^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * inode.c - NTFS kernel inode handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/quotaops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/log2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "aops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "attrib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "bitmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "dir.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "lcnalloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "malloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "mft.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "time.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "ntfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * ntfs_test_inode - compare two (possibly fake) inodes for equality
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * @vi: vfs inode which to test
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * @data: data which is being tested with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Compare the ntfs attribute embedded in the ntfs specific part of the vfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * inode @vi for equality with the ntfs attribute @data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * If searching for the normal file/directory inode, set @na->type to AT_UNUSED.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @na->name and @na->name_len are then ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * Return 1 if the attributes match and 0 if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * NOTE: This function runs with the inode_hash_lock spin lock held so it is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * allowed to sleep.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int ntfs_test_inode(struct inode *vi, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ntfs_attr *na = (ntfs_attr *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ntfs_inode *ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (vi->i_ino != na->mft_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* If !NInoAttr(ni), @vi is a normal file or directory inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (likely(!NInoAttr(ni))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* If not looking for a normal inode this is a mismatch. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (unlikely(na->type != AT_UNUSED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* A fake inode describing an attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (ni->type != na->type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (ni->name_len != na->name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (na->name_len && memcmp(ni->name, na->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) na->name_len * sizeof(ntfschar)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Match! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * ntfs_init_locked_inode - initialize an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * @vi: vfs inode to initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * @data: data which to initialize @vi to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * Initialize the vfs inode @vi with the values from the ntfs attribute @data in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * order to enable ntfs_test_inode() to do its work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * In that case, @na->name and @na->name_len should be set to NULL and 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * respectively. Although that is not strictly necessary as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * ntfs_read_locked_inode() will fill them in later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * Return 0 on success and -errno on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * NOTE: This function runs with the inode->i_lock spin lock held so it is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * allowed to sleep. (Hence the GFP_ATOMIC allocation.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static int ntfs_init_locked_inode(struct inode *vi, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ntfs_attr *na = (ntfs_attr *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ntfs_inode *ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) vi->i_ino = na->mft_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ni->type = na->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (na->type == AT_INDEX_ALLOCATION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) NInoSetMstProtected(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ni->name = na->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ni->name_len = na->name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* If initializing a normal inode, we are done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (likely(na->type == AT_UNUSED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) BUG_ON(na->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) BUG_ON(na->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* It is a fake inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) NInoSetAttr(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * We have I30 global constant as an optimization as it is the name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * in >99.9% of named attributes! The other <0.1% incur a GFP_ATOMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * allocation but that is ok. And most attributes are unnamed anyway,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * thus the fraction of named attributes with name != I30 is actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * absolutely tiny.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (na->name_len && na->name != I30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) BUG_ON(!na->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) i = na->name_len * sizeof(ntfschar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ni->name = kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (!ni->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) memcpy(ni->name, na->name, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ni->name[na->name_len] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static int ntfs_read_locked_inode(struct inode *vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int ntfs_read_locked_index_inode(struct inode *base_vi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct inode *vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * ntfs_iget - obtain a struct inode corresponding to a specific normal inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * @sb: super block of mounted volume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @mft_no: mft record number / inode number to obtain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * Obtain the struct inode corresponding to a specific normal inode (i.e. a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * file or directory).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * If the inode is in the cache, it is just returned with an increased
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * reference count. Otherwise, a new struct inode is allocated and initialized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * and finally ntfs_read_locked_inode() is called to read in the inode and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * fill in the remainder of the inode structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * Return the struct inode on success. Check the return value with IS_ERR() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * if true, the function failed and the error code is obtained from PTR_ERR().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct inode *vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ntfs_attr na;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) na.mft_no = mft_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) na.type = AT_UNUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) na.name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) na.name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) vi = iget5_locked(sb, mft_no, ntfs_test_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) ntfs_init_locked_inode, &na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (unlikely(!vi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* If this is a freshly allocated inode, need to read it now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (vi->i_state & I_NEW) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) err = ntfs_read_locked_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) unlock_new_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * There is no point in keeping bad inodes around if the failure was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * due to ENOMEM. We want to be able to retry again later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (unlikely(err == -ENOMEM)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) iput(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) vi = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * ntfs_attr_iget - obtain a struct inode corresponding to an attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * @base_vi: vfs base inode containing the attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * @type: attribute type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * @name: Unicode name of the attribute (NULL if unnamed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @name_len: length of @name in Unicode characters (0 if unnamed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * Obtain the (fake) struct inode corresponding to the attribute specified by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * @type, @name, and @name_len, which is present in the base mft record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * specified by the vfs inode @base_vi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * If the attribute inode is in the cache, it is just returned with an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * increased reference count. Otherwise, a new struct inode is allocated and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * initialized, and finally ntfs_read_locked_attr_inode() is called to read the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * attribute and fill in the inode structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * Note, for index allocation attributes, you need to use ntfs_index_iget()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * instead of ntfs_attr_iget() as working with indices is a lot more complex.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * Return the struct inode of the attribute inode on success. Check the return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * value with IS_ERR() and if true, the function failed and the error code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * obtained from PTR_ERR().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ntfschar *name, u32 name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct inode *vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) ntfs_attr na;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* Make sure no one calls ntfs_attr_iget() for indices. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) BUG_ON(type == AT_INDEX_ALLOCATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) na.mft_no = base_vi->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) na.type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) na.name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) na.name_len = name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ntfs_init_locked_inode, &na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (unlikely(!vi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* If this is a freshly allocated inode, need to read it now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (vi->i_state & I_NEW) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) err = ntfs_read_locked_attr_inode(base_vi, vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) unlock_new_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * There is no point in keeping bad attribute inodes around. This also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * simplifies things in that we never need to check for bad attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * inodes elsewhere.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) iput(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) vi = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * ntfs_index_iget - obtain a struct inode corresponding to an index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * @base_vi: vfs base inode containing the index related attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * @name: Unicode name of the index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * @name_len: length of @name in Unicode characters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * Obtain the (fake) struct inode corresponding to the index specified by @name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * and @name_len, which is present in the base mft record specified by the vfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * inode @base_vi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * If the index inode is in the cache, it is just returned with an increased
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * reference count. Otherwise, a new struct inode is allocated and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * initialized, and finally ntfs_read_locked_index_inode() is called to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * the index related attributes and fill in the inode structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * Return the struct inode of the index inode on success. Check the return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * value with IS_ERR() and if true, the function failed and the error code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * obtained from PTR_ERR().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) u32 name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct inode *vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) ntfs_attr na;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) na.mft_no = base_vi->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) na.type = AT_INDEX_ALLOCATION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) na.name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) na.name_len = name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) ntfs_init_locked_inode, &na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (unlikely(!vi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) /* If this is a freshly allocated inode, need to read it now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (vi->i_state & I_NEW) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) err = ntfs_read_locked_index_inode(base_vi, vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) unlock_new_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * There is no point in keeping bad index inodes around. This also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * simplifies things in that we never need to check for bad index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * inodes elsewhere.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) iput(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) vi = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct inode *ntfs_alloc_big_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) ntfs_inode *ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) ni = kmem_cache_alloc(ntfs_big_inode_cache, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (likely(ni != NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ni->state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return VFS_I(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) ntfs_error(sb, "Allocation of NTFS big inode structure failed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) void ntfs_free_big_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static inline ntfs_inode *ntfs_alloc_extent_inode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) ntfs_inode *ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) ni = kmem_cache_alloc(ntfs_inode_cache, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (likely(ni != NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) ni->state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ntfs_error(NULL, "Allocation of NTFS inode structure failed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static void ntfs_destroy_extent_inode(ntfs_inode *ni)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) BUG_ON(ni->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (!atomic_dec_and_test(&ni->count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) kmem_cache_free(ntfs_inode_cache, ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * The attribute runlist lock has separate locking rules from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * normal runlist lock, so split the two lock-classes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static struct lock_class_key attr_list_rl_lock_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * __ntfs_init_inode - initialize ntfs specific part of an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * @sb: super block of mounted volume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * @ni: freshly allocated ntfs inode which to initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * Initialize an ntfs inode to defaults.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * NOTE: ni->mft_no, ni->state, ni->type, ni->name, and ni->name_len are left
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * untouched. Make sure to initialize them elsewhere.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * Return zero on success and -ENOMEM on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) rwlock_init(&ni->size_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ni->initialized_size = ni->allocated_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) ni->seq_no = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) atomic_set(&ni->count, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ni->vol = NTFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) ntfs_init_runlist(&ni->runlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) mutex_init(&ni->mrec_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) ni->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ni->page_ofs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) ni->attr_list_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ni->attr_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) ntfs_init_runlist(&ni->attr_list_rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) lockdep_set_class(&ni->attr_list_rl.lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) &attr_list_rl_lock_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ni->itype.index.block_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) ni->itype.index.vcn_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ni->itype.index.collation_rule = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) ni->itype.index.block_size_bits = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) ni->itype.index.vcn_size_bits = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) mutex_init(&ni->extent_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) ni->nr_extents = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) ni->ext.base_ntfs_ino = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * Extent inodes get MFT-mapped in a nested way, while the base inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * is still mapped. Teach this nesting to the lock validator by creating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * a separate class for nested inode's mrec_lock's:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static struct lock_class_key extent_inode_mrec_lock_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) unsigned long mft_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) ntfs_inode *ni = ntfs_alloc_extent_inode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (likely(ni != NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) __ntfs_init_inode(sb, ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ni->mft_no = mft_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ni->type = AT_UNUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ni->name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ni->name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * ntfs_is_extended_system_file - check if a file is in the $Extend directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * @ctx: initialized attribute search context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * Search all file name attributes in the inode described by the attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * search context @ctx and check if any of the names are in the $Extend system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * Return values:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * 1: file is in $Extend directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * 0: file is not in $Extend directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * -errno: failed to determine if the file is in the $Extend directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static int ntfs_is_extended_system_file(ntfs_attr_search_ctx *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) int nr_links, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) /* Restart search. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /* Get number of hard links. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) nr_links = le16_to_cpu(ctx->mrec->link_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* Loop through all hard links. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) while (!(err = ntfs_attr_lookup(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) ctx))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) FILE_NAME_ATTR *file_name_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) ATTR_RECORD *attr = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) u8 *p, *p2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) nr_links--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * Maximum sanity checking as we are called on an inode that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * we suspect might be corrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) p = (u8*)attr + le32_to_cpu(attr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (p < (u8*)ctx->mrec || (u8*)p > (u8*)ctx->mrec +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) le32_to_cpu(ctx->mrec->bytes_in_use)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) err_corrupt_attr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ntfs_error(ctx->ntfs_ino->vol->sb, "Corrupt file name "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) "attribute. You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (attr->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) ntfs_error(ctx->ntfs_ino->vol->sb, "Non-resident file "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) "name. You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (attr->flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) ntfs_error(ctx->ntfs_ino->vol->sb, "File name with "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) "invalid flags. You should run "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) "chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (!(attr->data.resident.flags & RESIDENT_ATTR_IS_INDEXED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) ntfs_error(ctx->ntfs_ino->vol->sb, "Unindexed file "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) "name. You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) file_name_attr = (FILE_NAME_ATTR*)((u8*)attr +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) le16_to_cpu(attr->data.resident.value_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) p2 = (u8 *)file_name_attr + le32_to_cpu(attr->data.resident.value_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (p2 < (u8*)attr || p2 > p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) goto err_corrupt_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) /* This attribute is ok, but is it in the $Extend directory? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (MREF_LE(file_name_attr->parent_directory) == FILE_Extend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return 1; /* YES, it's an extended system file. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (unlikely(err != -ENOENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) if (unlikely(nr_links)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) ntfs_error(ctx->ntfs_ino->vol->sb, "Inode hard link count "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) "doesn't match number of name attributes. You "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) "should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) return 0; /* NO, it is not an extended system file. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * ntfs_read_locked_inode - read an inode from its device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * @vi: inode to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) * ntfs_read_locked_inode() is called from ntfs_iget() to read the inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * described by @vi into memory from the device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * The only fields in @vi that we need to/can look at when the function is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * called are i_sb, pointing to the mounted device's super block, and i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * the number of the inode to load.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) * ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * for reading and sets up the necessary @vi fields as well as initializing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * the ntfs inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * Q: What locks are held when the function is called?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * A: i_state has I_NEW set, hence the inode is locked, also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * i_count is set to 1, so it is not going to go away
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * i_flags is set to 0 and we have no business touching it. Only an ioctl()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * is allowed to write to them. We should of course be honouring them but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * we need to do that using the IS_* macros defined in include/linux/fs.h.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * In any case ntfs_read_locked_inode() has nothing to do with i_flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * Return 0 on success and -errno on error. In the error case, the inode will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * have had make_bad_inode() executed on it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) static int ntfs_read_locked_inode(struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ntfs_volume *vol = NTFS_SB(vi->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ntfs_inode *ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) struct inode *bvi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) MFT_RECORD *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) ATTR_RECORD *a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) STANDARD_INFORMATION *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /* Setup the generic vfs inode parts now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) vi->i_uid = vol->uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) vi->i_gid = vol->gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) vi->i_mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * Initialize the ntfs specific part of @vi special casing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * FILE_MFT which we need to do at mount time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (vi->i_ino != FILE_MFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) ntfs_init_big_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) m = map_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if (IS_ERR(m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) err = PTR_ERR(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) ctx = ntfs_attr_get_search_ctx(ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (!ctx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (!(m->flags & MFT_RECORD_IN_USE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) ntfs_error(vi->i_sb, "Inode is not in use!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (m->base_mft_record) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) ntfs_error(vi->i_sb, "Inode is an extent inode!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) /* Transfer information from mft record into vfs and ntfs inodes. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * FIXME: Keep in mind that link_count is two for files which have both
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * a long file name and a short file name as separate entries, so if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * we are hiding short file names this will be too high. Either we need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * to account for the short file names by subtracting them or we need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * to make sure we delete files even though i_nlink is not zero which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * might be tricky due to vfs interactions. Need to think about this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * some more when implementing the unlink command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) set_nlink(vi, le16_to_cpu(m->link_count));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * FIXME: Reparse points can have the directory bit set even though
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * they would be S_IFLNK. Need to deal with this further below when we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * implement reparse points / symbolic links but it will do for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) * Also if not a directory, it could be something else, rather than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) * a regular file. But again, will do for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /* Everyone gets all permissions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) vi->i_mode |= S_IRWXUGO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /* If read-only, no one gets write permissions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (IS_RDONLY(vi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) vi->i_mode &= ~S_IWUGO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (m->flags & MFT_RECORD_IS_DIRECTORY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) vi->i_mode |= S_IFDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * Apply the directory permissions mask set in the mount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) vi->i_mode &= ~vol->dmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /* Things break without this kludge! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) if (vi->i_nlink > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) set_nlink(vi, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) vi->i_mode |= S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) /* Apply the file permissions mask set in the mount options. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) vi->i_mode &= ~vol->fmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * Find the standard information attribute in the mft record. At this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * stage we haven't setup the attribute list stuff yet, so this could
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * in fact fail if the standard information is in an extent record, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * I don't think this actually ever happens.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (err == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) * TODO: We should be performing a hot fix here (if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * recover mount option is set) by creating a new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * attribute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) "is missing.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) /* Get the standard information attribute value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if ((u8 *)a + le16_to_cpu(a->data.resident.value_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) + le32_to_cpu(a->data.resident.value_length) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) (u8 *)ctx->mrec + vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) ntfs_error(vi->i_sb, "Corrupt standard information attribute in inode.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) si = (STANDARD_INFORMATION*)((u8*)a +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) le16_to_cpu(a->data.resident.value_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) /* Transfer information from the standard information into vi. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) * Note: The i_?times do not quite map perfectly onto the NTFS times,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) * but they are close enough, and in the end it doesn't really matter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) * that much...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * mtime is the last change of the data within the file. Not changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * when only metadata is changed, e.g. a rename doesn't affect mtime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) vi->i_mtime = ntfs2utc(si->last_data_change_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * ctime is the last change of the metadata of the file. This obviously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * always changes, when mtime is changed. ctime can be changed on its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * own, mtime is then not changed, e.g. when a file is renamed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) vi->i_ctime = ntfs2utc(si->last_mft_change_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * Last access to the data within the file. Not changed during a rename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * for example but changed whenever the file is written to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) vi->i_atime = ntfs2utc(si->last_access_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) /* Find the attribute list attribute if present. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (unlikely(err != -ENOENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) ntfs_error(vi->i_sb, "Failed to lookup attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) "attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) } else /* if (!err) */ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (vi->i_ino == FILE_MFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) goto skip_attr_list_load;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) ntfs_debug("Attribute list found in inode 0x%lx.", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) NInoSetAttrList(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) ntfs_error(vi->i_sb, "Attribute list attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) "compressed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (a->flags & ATTR_IS_ENCRYPTED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) a->flags & ATTR_IS_SPARSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) ntfs_error(vi->i_sb, "Non-resident attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) "list attribute is encrypted/"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) "sparse.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) ntfs_warning(vi->i_sb, "Resident attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) "attribute in inode 0x%lx is marked "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) "encrypted/sparse which is not true. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) "However, Windows allows this and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) "chkdsk does not detect or correct it "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) "so we will just ignore the invalid "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) "flags and pretend they are not set.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) /* Now allocate memory for the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) ni->attr_list_size = (u32)ntfs_attr_size(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) if (!ni->attr_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) ntfs_error(vi->i_sb, "Not enough memory to allocate "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) "buffer for attribute list.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) if (a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) NInoSetAttrListNonResident(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) ntfs_error(vi->i_sb, "Attribute list has non "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) "zero lowest_vcn.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) * Setup the runlist. No need for locking as we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * exclusive access to the inode at this time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) a, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (IS_ERR(ni->attr_list_rl.rl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) err = PTR_ERR(ni->attr_list_rl.rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) ni->attr_list_rl.rl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) ntfs_error(vi->i_sb, "Mapping pairs "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) "decompression failed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) /* Now load the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if ((err = load_attribute_list(vol, &ni->attr_list_rl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) ni->attr_list, ni->attr_list_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) sle64_to_cpu(a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) initialized_size)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) ntfs_error(vi->i_sb, "Failed to load "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) "attribute list attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) } else /* if (!a->non_resident) */ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) if ((u8*)a + le16_to_cpu(a->data.resident.value_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) + le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) a->data.resident.value_length) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) (u8*)ctx->mrec + vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ntfs_error(vi->i_sb, "Corrupt attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) "in inode.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) /* Now copy the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) a->data.resident.value_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) a->data.resident.value_length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) skip_attr_list_load:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * If an attribute list is present we now have the attribute list value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * in ntfs_ino->attr_list and it is ntfs_ino->attr_list_size bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) if (S_ISDIR(vi->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) loff_t bvi_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) ntfs_inode *bni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) INDEX_ROOT *ir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) u8 *ir_end, *index_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) /* It is a directory, find index root attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (err == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) // FIXME: File is corrupt! Hot-fix with empty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) // index root attribute if recovery option is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) // set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) ntfs_error(vi->i_sb, "$INDEX_ROOT attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) "is missing.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /* Set up the state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if (unlikely(a->non_resident)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) ntfs_error(vol->sb, "$INDEX_ROOT attribute is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) "resident.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /* Ensure the attribute name is placed before the value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) le16_to_cpu(a->data.resident.value_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) ntfs_error(vol->sb, "$INDEX_ROOT attribute name is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) "placed after the attribute value.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * Compressed/encrypted index root just means that the newly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) * created files in that directory should be created compressed/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) * encrypted. However index root cannot be both compressed and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) * encrypted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (a->flags & ATTR_COMPRESSION_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) NInoSetCompressed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (a->flags & ATTR_IS_ENCRYPTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) ntfs_error(vi->i_sb, "Found encrypted and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) "compressed attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) NInoSetEncrypted(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (a->flags & ATTR_IS_SPARSE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) NInoSetSparse(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) ir = (INDEX_ROOT*)((u8*)a +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) le16_to_cpu(a->data.resident.value_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) "corrupt.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) index_end = (u8*)&ir->index +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) le32_to_cpu(ir->index.index_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (index_end > ir_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) ntfs_error(vi->i_sb, "Directory index is corrupt.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (ir->type != AT_FILE_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) ntfs_error(vi->i_sb, "Indexed attribute is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) "$FILE_NAME.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (ir->collation_rule != COLLATION_FILE_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) ntfs_error(vi->i_sb, "Index collation rule is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) "COLLATION_FILE_NAME.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) ni->itype.index.collation_rule = ir->collation_rule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) if (ni->itype.index.block_size &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) (ni->itype.index.block_size - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) ntfs_error(vi->i_sb, "Index block size (%u) is not a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) "power of two.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) ni->itype.index.block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) if (ni->itype.index.block_size > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) ntfs_error(vi->i_sb, "Index block size (%u) > "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) "PAGE_SIZE (%ld) is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) "supported. Sorry.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) ni->itype.index.block_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) ntfs_error(vi->i_sb, "Index block size (%u) < "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) "NTFS_BLOCK_SIZE (%i) is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) "supported. Sorry.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) ni->itype.index.block_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) NTFS_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) ni->itype.index.block_size_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) ffs(ni->itype.index.block_size) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) /* Determine the size of a vcn in the directory index. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) if (vol->cluster_size <= ni->itype.index.block_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) ni->itype.index.vcn_size = vol->cluster_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) ni->itype.index.vcn_size = vol->sector_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) ni->itype.index.vcn_size_bits = vol->sector_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /* Setup the index allocation attribute, even if not present. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) NInoSetMstProtected(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) ni->type = AT_INDEX_ALLOCATION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) ni->name = I30;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) ni->name_len = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (!(ir->index.flags & LARGE_INDEX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) /* No index allocation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) vi->i_size = ni->initialized_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) ni->allocated_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) /* We are done with the mft record, so we release it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) goto skip_large_dir_stuff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) } /* LARGE_INDEX: Index allocation present. Setup state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) NInoSetIndexAllocPresent(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) /* Find index allocation attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, I30, 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) "attribute is not present but "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) "$INDEX_ROOT indicated it is.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) ntfs_error(vi->i_sb, "Failed to lookup "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) "$INDEX_ALLOCATION "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) "attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) if (!a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) "is resident.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) * Ensure the attribute name is placed before the mapping pairs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) * array.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) a->data.non_resident.mapping_pairs_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) "is placed after the mapping pairs "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) "array.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) if (a->flags & ATTR_IS_ENCRYPTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) "is encrypted.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (a->flags & ATTR_IS_SPARSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) "is sparse.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) "is compressed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) ntfs_error(vi->i_sb, "First extent of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) "$INDEX_ALLOCATION attribute has non "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) "zero lowest_vcn.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) ni->initialized_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) a->data.non_resident.initialized_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) ni->allocated_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) a->data.non_resident.allocated_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) * We are done with the mft record, so we release it. Otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) * we would deadlock in ntfs_attr_iget().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) /* Get the index bitmap attribute inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) bvi = ntfs_attr_iget(vi, AT_BITMAP, I30, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (IS_ERR(bvi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) err = PTR_ERR(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) bni = NTFS_I(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (NInoCompressed(bni) || NInoEncrypted(bni) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) NInoSparse(bni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) ntfs_error(vi->i_sb, "$BITMAP attribute is compressed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) "and/or encrypted and/or sparse.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) goto iput_unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) /* Consistency check bitmap size vs. index allocation size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) bvi_size = i_size_read(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) if ((bvi_size << 3) < (vi->i_size >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) ni->itype.index.block_size_bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) "for index allocation (0x%llx).",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) bvi_size << 3, vi->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) goto iput_unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) /* No longer need the bitmap attribute inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) iput(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) skip_large_dir_stuff:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) /* Setup the operations for this inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) vi->i_op = &ntfs_dir_inode_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) vi->i_fop = &ntfs_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) vi->i_mapping->a_ops = &ntfs_mst_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) /* It is a file. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) /* Setup the data attribute, even if not present. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) ni->type = AT_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) ni->name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) ni->name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) /* Find first extent of the unnamed data attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) vi->i_size = ni->initialized_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) ni->allocated_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) if (err != -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) ntfs_error(vi->i_sb, "Failed to lookup $DATA "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) "attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) * FILE_Secure does not have an unnamed $DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) * attribute, so we special case it here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) if (vi->i_ino == FILE_Secure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) goto no_data_attr_special_case;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) * Most if not all the system files in the $Extend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * system directory do not have unnamed data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) * attributes so we need to check if the parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) * directory of the file is FILE_Extend and if it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) * ignore this error. To do this we need to get the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) * name of this inode from the mft record as the name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) * contains the back reference to the parent directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) if (ntfs_is_extended_system_file(ctx) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) goto no_data_attr_special_case;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) // FIXME: File is corrupt! Hot-fix with empty data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) // attribute if recovery option is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) ntfs_error(vi->i_sb, "$DATA attribute is missing.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) /* Setup the state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) NInoSetCompressed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) if (vol->cluster_size > 4096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) ntfs_error(vi->i_sb, "Found "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) "compressed data but "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) "compression is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) "disabled due to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) "cluster size (%i) > "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) "4kiB.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) vol->cluster_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) if ((a->flags & ATTR_COMPRESSION_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) != ATTR_IS_COMPRESSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) ntfs_error(vi->i_sb, "Found unknown "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) "compression method "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) "or corrupt file.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) if (a->flags & ATTR_IS_SPARSE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) NInoSetSparse(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (a->flags & ATTR_IS_ENCRYPTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) if (NInoCompressed(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) ntfs_error(vi->i_sb, "Found encrypted and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) "compressed data.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) NInoSetEncrypted(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) if (a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) NInoSetNonResident(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) if (NInoCompressed(ni) || NInoSparse(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) if (NInoCompressed(ni) && a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) compression_unit != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) ntfs_error(vi->i_sb, "Found "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) "non-standard "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) "compression unit (%u "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) "instead of 4). "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) "Cannot handle this.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) compression_unit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) if (a->data.non_resident.compression_unit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) ni->itype.compressed.block_size = 1U <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) (a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) compression_unit +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) vol->cluster_size_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) ni->itype.compressed.block_size_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) ffs(ni->itype.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) compressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) block_size) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) ni->itype.compressed.block_clusters =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) 1U << a->data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) compression_unit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) ni->itype.compressed.block_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) ni->itype.compressed.block_size_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) ni->itype.compressed.block_clusters =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) ni->itype.compressed.size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) compressed_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) ntfs_error(vi->i_sb, "First extent of $DATA "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) "attribute has non zero "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) "lowest_vcn.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) vi->i_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) a->data.non_resident.data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) ni->initialized_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) a->data.non_resident.initialized_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) ni->allocated_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) a->data.non_resident.allocated_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) } else { /* Resident attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) vi->i_size = ni->initialized_size = le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) a->data.resident.value_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) ni->allocated_size = le32_to_cpu(a->length) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) a->data.resident.value_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (vi->i_size > ni->allocated_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) ntfs_error(vi->i_sb, "Resident data attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) "is corrupt (size exceeds "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) "allocation).");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) no_data_attr_special_case:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) /* We are done with the mft record, so we release it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /* Setup the operations for this inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) vi->i_op = &ntfs_file_inode_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) vi->i_fop = &ntfs_file_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) vi->i_mapping->a_ops = &ntfs_normal_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (NInoMstProtected(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) vi->i_mapping->a_ops = &ntfs_mst_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) else if (NInoCompressed(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) vi->i_mapping->a_ops = &ntfs_compressed_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) * The number of 512-byte blocks used on disk (for stat). This is in so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) * far inaccurate as it doesn't account for any named streams or other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) * special non-resident attributes, but that is how Windows works, too,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) * so we are at least consistent with Windows, if not entirely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) * consistent with the Linux Way. Doing it the Linux Way would cause a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) * significant slowdown as it would involve iterating over all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) * attributes in the mft record and adding the allocated/compressed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) * sizes of all non-resident attributes present to give us the Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) * correct size that should go into i_blocks (after division by 512).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) if (S_ISREG(vi->i_mode) && (NInoCompressed(ni) || NInoSparse(ni)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) vi->i_blocks = ni->itype.compressed.size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) vi->i_blocks = ni->allocated_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) iput_unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) iput(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) if (ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) if (m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) ntfs_error(vol->sb, "Failed with error code %i. Marking corrupt "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) "inode 0x%lx as bad. Run chkdsk.", err, vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) make_bad_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) if (err != -EOPNOTSUPP && err != -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) * ntfs_read_locked_attr_inode - read an attribute inode from its base inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) * @base_vi: base inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) * @vi: attribute inode to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) * attribute inode described by @vi into memory from the base mft record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) * described by @base_ni.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) * ntfs_read_locked_attr_inode() maps, pins and locks the base inode for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) * reading and looks up the attribute described by @vi before setting up the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) * necessary fields in @vi as well as initializing the ntfs inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) * Q: What locks are held when the function is called?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) * A: i_state has I_NEW set, hence the inode is locked, also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) * i_count is set to 1, so it is not going to go away
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) * Return 0 on success and -errno on error. In the error case, the inode will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) * have had make_bad_inode() executed on it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) * Note this cannot be called for AT_INDEX_ALLOCATION.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) ntfs_volume *vol = NTFS_SB(vi->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) ntfs_inode *ni, *base_ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) MFT_RECORD *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) ATTR_RECORD *a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) ntfs_init_big_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) base_ni = NTFS_I(base_vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) /* Just mirror the values from the base inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) vi->i_uid = base_vi->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) vi->i_gid = base_vi->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) set_nlink(vi, base_vi->i_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) vi->i_mtime = base_vi->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) vi->i_ctime = base_vi->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) vi->i_atime = base_vi->i_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) vi->i_generation = ni->seq_no = base_ni->seq_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) /* Set inode type to zero but preserve permissions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) vi->i_mode = base_vi->i_mode & ~S_IFMT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) m = map_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) if (IS_ERR(m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) err = PTR_ERR(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) ctx = ntfs_attr_get_search_ctx(base_ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) if (!ctx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) /* Find the attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) NInoSetCompressed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) if ((ni->type != AT_DATA) || (ni->type == AT_DATA &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) ni->name_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) ntfs_error(vi->i_sb, "Found compressed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) "non-data or named data "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) "attribute. Please report "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) "you saw this message to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) "linux-ntfs-dev@lists."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) "sourceforge.net");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) if (vol->cluster_size > 4096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) ntfs_error(vi->i_sb, "Found compressed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) "attribute but compression is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) "disabled due to cluster size "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) "(%i) > 4kiB.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) vol->cluster_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) if ((a->flags & ATTR_COMPRESSION_MASK) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) ATTR_IS_COMPRESSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) ntfs_error(vi->i_sb, "Found unknown "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) "compression method.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) * The compressed/sparse flag set in an index root just means
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) * to compress all files.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) ntfs_error(vi->i_sb, "Found mst protected attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) "but the attribute is %s. Please "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) "report you saw this message to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) "linux-ntfs-dev@lists.sourceforge.net",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) NInoCompressed(ni) ? "compressed" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) "sparse");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) if (a->flags & ATTR_IS_SPARSE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) NInoSetSparse(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) if (a->flags & ATTR_IS_ENCRYPTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) if (NInoCompressed(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) ntfs_error(vi->i_sb, "Found encrypted and compressed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) "data.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) * The encryption flag set in an index root just means to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) * encrypt all files.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) ntfs_error(vi->i_sb, "Found mst protected attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) "but the attribute is encrypted. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) "Please report you saw this message "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) "to linux-ntfs-dev@lists.sourceforge."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) "net");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) if (ni->type != AT_DATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) ntfs_error(vi->i_sb, "Found encrypted non-data "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) "attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) NInoSetEncrypted(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) if (!a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) /* Ensure the attribute name is placed before the value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) le16_to_cpu(a->data.resident.value_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) ntfs_error(vol->sb, "Attribute name is placed after "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) "the attribute value.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) if (NInoMstProtected(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) ntfs_error(vi->i_sb, "Found mst protected attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) "but the attribute is resident. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) "Please report you saw this message to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) "linux-ntfs-dev@lists.sourceforge.net");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) vi->i_size = ni->initialized_size = le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) a->data.resident.value_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) ni->allocated_size = le32_to_cpu(a->length) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) le16_to_cpu(a->data.resident.value_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) if (vi->i_size > ni->allocated_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) ntfs_error(vi->i_sb, "Resident attribute is corrupt "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) "(size exceeds allocation).");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) NInoSetNonResident(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) * Ensure the attribute name is placed before the mapping pairs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) * array.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) a->data.non_resident.mapping_pairs_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) ntfs_error(vol->sb, "Attribute name is placed after "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) "the mapping pairs array.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) if (NInoCompressed(ni) || NInoSparse(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) if (NInoCompressed(ni) && a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) compression_unit != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) ntfs_error(vi->i_sb, "Found non-standard "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) "compression unit (%u instead "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) "of 4). Cannot handle this.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) compression_unit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) if (a->data.non_resident.compression_unit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) ni->itype.compressed.block_size = 1U <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) (a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) compression_unit +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) vol->cluster_size_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) ni->itype.compressed.block_size_bits =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) ffs(ni->itype.compressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) block_size) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) ni->itype.compressed.block_clusters = 1U <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) a->data.non_resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) compression_unit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) ni->itype.compressed.block_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) ni->itype.compressed.block_size_bits = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) ni->itype.compressed.block_clusters = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) ni->itype.compressed.size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) a->data.non_resident.compressed_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) ntfs_error(vi->i_sb, "First extent of attribute has "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) "non-zero lowest_vcn.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) ni->initialized_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) a->data.non_resident.initialized_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) ni->allocated_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) a->data.non_resident.allocated_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) vi->i_mapping->a_ops = &ntfs_normal_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if (NInoMstProtected(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) vi->i_mapping->a_ops = &ntfs_mst_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) else if (NInoCompressed(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) vi->i_mapping->a_ops = &ntfs_compressed_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) vi->i_blocks = ni->itype.compressed.size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) vi->i_blocks = ni->allocated_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) * Make sure the base inode does not go away and attach it to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) * attribute inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) igrab(base_vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) ni->ext.base_ntfs_ino = base_ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) ni->nr_extents = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) if (ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) ntfs_error(vol->sb, "Failed with error code %i while reading attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) "inode (mft_no 0x%lx, type 0x%x, name_len %i). "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) "Marking corrupt inode and base inode 0x%lx as bad. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) "Run chkdsk.", err, vi->i_ino, ni->type, ni->name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) base_vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) make_bad_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) if (err != -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) * ntfs_read_locked_index_inode - read an index inode from its base inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) * @base_vi: base inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) * @vi: index inode to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) * index inode described by @vi into memory from the base mft record described
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) * by @base_ni.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) * ntfs_read_locked_index_inode() maps, pins and locks the base inode for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) * reading and looks up the attributes relating to the index described by @vi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) * before setting up the necessary fields in @vi as well as initializing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) * ntfs inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) * Note, index inodes are essentially attribute inodes (NInoAttr() is true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) * with the attribute type set to AT_INDEX_ALLOCATION. Apart from that, they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) * are setup like directory inodes since directories are a special case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) * indices ao they need to be treated in much the same way. Most importantly,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) * for small indices the index allocation attribute might not actually exist.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) * However, the index root attribute always exists but this does not need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) * have an inode associated with it and this is why we define a new inode type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) * index. Also, like for directories, we need to have an attribute inode for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) * the bitmap attribute corresponding to the index allocation attribute and we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) * can store this in the appropriate field of the inode, just like we do for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) * normal directory inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) * Q: What locks are held when the function is called?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) * A: i_state has I_NEW set, hence the inode is locked, also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) * i_count is set to 1, so it is not going to go away
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) * Return 0 on success and -errno on error. In the error case, the inode will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) * have had make_bad_inode() executed on it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) loff_t bvi_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) ntfs_volume *vol = NTFS_SB(vi->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) ntfs_inode *ni, *base_ni, *bni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) struct inode *bvi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) MFT_RECORD *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) ATTR_RECORD *a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) INDEX_ROOT *ir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) u8 *ir_end, *index_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) ntfs_init_big_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) base_ni = NTFS_I(base_vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) /* Just mirror the values from the base inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) vi->i_uid = base_vi->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) vi->i_gid = base_vi->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) set_nlink(vi, base_vi->i_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) vi->i_mtime = base_vi->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) vi->i_ctime = base_vi->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) vi->i_atime = base_vi->i_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) vi->i_generation = ni->seq_no = base_ni->seq_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) /* Set inode type to zero but preserve permissions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) vi->i_mode = base_vi->i_mode & ~S_IFMT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) /* Map the mft record for the base inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) m = map_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) if (IS_ERR(m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) err = PTR_ERR(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) ctx = ntfs_attr_get_search_ctx(base_ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (!ctx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) /* Find the index root attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) err = ntfs_attr_lookup(AT_INDEX_ROOT, ni->name, ni->name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) "missing.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) /* Set up the state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) if (unlikely(a->non_resident)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) ntfs_error(vol->sb, "$INDEX_ROOT attribute is not resident.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) /* Ensure the attribute name is placed before the value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) le16_to_cpu(a->data.resident.value_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) ntfs_error(vol->sb, "$INDEX_ROOT attribute name is placed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) "after the attribute value.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) * Compressed/encrypted/sparse index root is not allowed, except for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) * directories of course but those are not dealt with here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) ATTR_IS_SPARSE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) "root attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) ir = (INDEX_ROOT*)((u8*)a + le16_to_cpu(a->data.resident.value_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) if (index_end > ir_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) ntfs_error(vi->i_sb, "Index is corrupt.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) if (ir->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x).",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) le32_to_cpu(ir->type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) ni->itype.index.collation_rule = ir->collation_rule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) ntfs_debug("Index collation rule is 0x%x.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) le32_to_cpu(ir->collation_rule));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) if (!is_power_of_2(ni->itype.index.block_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) "two.", ni->itype.index.block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) if (ni->itype.index.block_size > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_SIZE "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) "(%ld) is not supported. Sorry.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) ni->itype.index.block_size, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) "(%i) is not supported. Sorry.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) ni->itype.index.block_size, NTFS_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) /* Determine the size of a vcn in the index. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) if (vol->cluster_size <= ni->itype.index.block_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) ni->itype.index.vcn_size = vol->cluster_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) ni->itype.index.vcn_size = vol->sector_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) ni->itype.index.vcn_size_bits = vol->sector_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) /* Check for presence of index allocation attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) if (!(ir->index.flags & LARGE_INDEX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) /* No index allocation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) vi->i_size = ni->initialized_size = ni->allocated_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) /* We are done with the mft record, so we release it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) goto skip_large_index_stuff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) } /* LARGE_INDEX: Index allocation present. Setup state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) NInoSetIndexAllocPresent(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) /* Find index allocation attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, ni->name, ni->name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) "not present but $INDEX_ROOT "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) "indicated it is.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) ntfs_error(vi->i_sb, "Failed to lookup "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) "$INDEX_ALLOCATION attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) if (!a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) "resident.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) * Ensure the attribute name is placed before the mapping pairs array.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) a->data.non_resident.mapping_pairs_offset)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) "placed after the mapping pairs array.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) if (a->flags & ATTR_IS_ENCRYPTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) "encrypted.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) if (a->flags & ATTR_IS_SPARSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) "compressed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) "attribute has non zero lowest_vcn.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) ni->initialized_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) a->data.non_resident.initialized_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) ni->allocated_size = sle64_to_cpu(a->data.non_resident.allocated_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) * We are done with the mft record, so we release it. Otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) * we would deadlock in ntfs_attr_iget().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) /* Get the index bitmap attribute inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) if (IS_ERR(bvi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) err = PTR_ERR(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) bni = NTFS_I(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) if (NInoCompressed(bni) || NInoEncrypted(bni) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) NInoSparse(bni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) ntfs_error(vi->i_sb, "$BITMAP attribute is compressed and/or "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) "encrypted and/or sparse.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) goto iput_unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) /* Consistency check bitmap size vs. index allocation size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) bvi_size = i_size_read(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) if ((bvi_size << 3) < (vi->i_size >> ni->itype.index.block_size_bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) "index allocation (0x%llx).", bvi_size << 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) vi->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) goto iput_unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) iput(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) skip_large_index_stuff:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) /* Setup the operations for this index inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) vi->i_mapping->a_ops = &ntfs_mst_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) vi->i_blocks = ni->allocated_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) * Make sure the base inode doesn't go away and attach it to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) * index inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) igrab(base_vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) ni->ext.base_ntfs_ino = base_ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) ni->nr_extents = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) iput_unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) iput(bvi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) if (ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) if (m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) ntfs_error(vi->i_sb, "Failed with error code %i while reading index "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) "inode (mft_no 0x%lx, name_len %i.", err, vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) ni->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) make_bad_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) if (err != -EOPNOTSUPP && err != -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) * The MFT inode has special locking, so teach the lock validator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) * about this by splitting off the locking rules of the MFT from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) * the locking rules of other inodes. The MFT inode can never be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) * accessed from the VFS side (or even internally), only by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) * map_mft functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) * ntfs_read_inode_mount - special read_inode for mount time use only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) * @vi: inode to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) * Read inode FILE_MFT at mount time, only called with super_block lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) * held from within the read_super() code path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) * This function exists because when it is called the page cache for $MFT/$DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) * is not initialized and hence we cannot get at the contents of mft records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) * by calling map_mft_record*().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) * Further it needs to cope with the circular references problem, i.e. cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) * we do not know where the other extent mft records are yet and again, because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) * we cannot call map_mft_record*() yet. Obviously this applies only when an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) * attribute list is actually present in $MFT inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) * We solve these problems by starting with the $DATA attribute before anything
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) * else and iterating using ntfs_attr_lookup($DATA) over all extents. As each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) * extent is found, we ntfs_mapping_pairs_decompress() including the implied
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) * ntfs_runlists_merge(). Each step of the iteration necessarily provides
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) * sufficient information for the next step to complete.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) * This should work but there are two possible pit falls (see inline comments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) * below), but only time will tell if they are real pits or just smoke...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) int ntfs_read_inode_mount(struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) VCN next_vcn, last_vcn, highest_vcn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) s64 block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) struct super_block *sb = vi->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) ntfs_volume *vol = NTFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) ntfs_inode *ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) MFT_RECORD *m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) ATTR_RECORD *a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) unsigned int i, nr_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) ntfs_debug("Entering.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) /* Initialize the ntfs specific part of @vi. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) ntfs_init_big_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) /* Setup the data attribute. It is special as it is mst protected. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) NInoSetNonResident(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) NInoSetMstProtected(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) NInoSetSparseDisabled(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) ni->type = AT_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) ni->name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) ni->name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) * This sets up our little cheat allowing us to reuse the async read io
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) * completion handler for directories.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) ni->itype.index.block_size = vol->mft_record_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) ni->itype.index.block_size_bits = vol->mft_record_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) /* Very important! Needed to be able to call map_mft_record*(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) vol->mft_ino = vi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) /* Allocate enough memory to read the first mft record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) if (vol->mft_record_size > 64 * 1024) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) ntfs_error(sb, "Unsupported mft record size %i (max 64kiB).",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) vol->mft_record_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) i = vol->mft_record_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) if (i < sb->s_blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) i = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) m = (MFT_RECORD*)ntfs_malloc_nofs(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) if (!m) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) ntfs_error(sb, "Failed to allocate buffer for $MFT record 0.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) /* Determine the first block of the $MFT/$DATA attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) block = vol->mft_lcn << vol->cluster_size_bits >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) sb->s_blocksize_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) nr_blocks = vol->mft_record_size >> sb->s_blocksize_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) if (!nr_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) nr_blocks = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) /* Load $MFT/$DATA's first mft record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) for (i = 0; i < nr_blocks; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) bh = sb_bread(sb, block++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) ntfs_error(sb, "Device read failed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) memcpy((char*)m + (i << sb->s_blocksize_bits), bh->b_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) sb->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) if (le32_to_cpu(m->bytes_allocated) != vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) ntfs_error(sb, "Incorrect mft record size %u in superblock, should be %u.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) le32_to_cpu(m->bytes_allocated), vol->mft_record_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) /* Apply the mst fixups. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) if (post_read_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) /* FIXME: Try to use the $MFTMirr now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) ntfs_error(sb, "MST fixup failed. $MFT is corrupt.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) /* Need this to sanity check attribute list references to $MFT. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) /* Provides readpage() for map_mft_record(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) vi->i_mapping->a_ops = &ntfs_mst_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) ctx = ntfs_attr_get_search_ctx(ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) if (!ctx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) /* Find the attribute list attribute if present. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) if (unlikely(err != -ENOENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) ntfs_error(sb, "Failed to lookup attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) "attribute. You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) } else /* if (!err) */ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) ATTR_LIST_ENTRY *al_entry, *next_al_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) u8 *al_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) static const char *es = " Not allowed. $MFT is corrupt. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) "You should run chkdsk.";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) ntfs_debug("Attribute list attribute found in $MFT.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) NInoSetAttrList(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) if (a->flags & ATTR_COMPRESSION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) ntfs_error(sb, "Attribute list attribute is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) "compressed.%s", es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) if (a->flags & ATTR_IS_ENCRYPTED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) a->flags & ATTR_IS_SPARSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) if (a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) ntfs_error(sb, "Non-resident attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) "attribute is encrypted/"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) "sparse.%s", es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) ntfs_warning(sb, "Resident attribute list attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) "in $MFT system file is marked "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) "encrypted/sparse which is not true. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) "However, Windows allows this and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) "chkdsk does not detect or correct it "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) "so we will just ignore the invalid "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) "flags and pretend they are not set.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) /* Now allocate memory for the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) ni->attr_list_size = (u32)ntfs_attr_size(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) if (!ni->attr_list_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) ntfs_error(sb, "Attr_list_size is zero");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) if (!ni->attr_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) ntfs_error(sb, "Not enough memory to allocate buffer "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) "for attribute list.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) if (a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) NInoSetAttrListNonResident(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) ntfs_error(sb, "Attribute list has non zero "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) "lowest_vcn. $MFT is corrupt. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) "You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) /* Setup the runlist. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) a, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) if (IS_ERR(ni->attr_list_rl.rl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) err = PTR_ERR(ni->attr_list_rl.rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) ni->attr_list_rl.rl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) ntfs_error(sb, "Mapping pairs decompression "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) "failed with error code %i.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) -err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) /* Now load the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) if ((err = load_attribute_list(vol, &ni->attr_list_rl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) ni->attr_list, ni->attr_list_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) sle64_to_cpu(a->data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) non_resident.initialized_size)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) ntfs_error(sb, "Failed to load attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) "attribute with error code %i.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) -err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) } else /* if (!ctx.attr->non_resident) */ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) if ((u8*)a + le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) a->data.resident.value_offset) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) a->data.resident.value_length) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) (u8*)ctx->mrec + vol->mft_record_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) ntfs_error(sb, "Corrupt attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) "attribute.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) /* Now copy the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) a->data.resident.value_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) a->data.resident.value_length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) /* The attribute list is now setup in memory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) * FIXME: I don't know if this case is actually possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) * According to logic it is not possible but I have seen too
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) * many weird things in MS software to rely on logic... Thus we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) * perform a manual search and make sure the first $MFT/$DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) * extent is in the base inode. If it is not we abort with an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) * error and if we ever see a report of this error we will need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) * to do some magic in order to have the necessary mft record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) * loaded and in the right place in the page cache. But
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) * hopefully logic will prevail and this never happens...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) al_entry = (ATTR_LIST_ENTRY*)ni->attr_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) al_end = (u8*)al_entry + ni->attr_list_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) for (;; al_entry = next_al_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) /* Out of bounds check. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) if ((u8*)al_entry < ni->attr_list ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) (u8*)al_entry > al_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) /* Catch the end of the attribute list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) if ((u8*)al_entry == al_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) if (!al_entry->length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) if ((u8*)al_entry + 6 > al_end || (u8*)al_entry +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) le16_to_cpu(al_entry->length) > al_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) next_al_entry = (ATTR_LIST_ENTRY*)((u8*)al_entry +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) le16_to_cpu(al_entry->length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) if (le32_to_cpu(al_entry->type) > le32_to_cpu(AT_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) if (AT_DATA != al_entry->type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) /* We want an unnamed attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) if (al_entry->name_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) /* Want the first entry, i.e. lowest_vcn == 0. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) if (al_entry->lowest_vcn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) /* First entry has to be in the base mft record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) if (MREF_LE(al_entry->mft_reference) != vi->i_ino) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) /* MFT references do not match, logic fails. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) ntfs_error(sb, "BUG: The first $DATA extent "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) "of $MFT is not in the base "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) "mft record. Please report "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) "you saw this message to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) "linux-ntfs-dev@lists."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) "sourceforge.net");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) /* Sequence numbers must match. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) if (MSEQNO_LE(al_entry->mft_reference) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) ni->seq_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) goto em_put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) /* Got it. All is ok. We can stop now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) ntfs_attr_reinit_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) /* Now load all attribute extents. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) a = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) next_vcn = last_vcn = highest_vcn = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) while (!(err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) ctx))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) runlist_element *nrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) /* Cache the current attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) /* $MFT must be non-resident. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) if (!a->non_resident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) ntfs_error(sb, "$MFT must be non-resident but a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) "resident extent was found. $MFT is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) "corrupt. Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) /* $MFT must be uncompressed and unencrypted. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) if (a->flags & ATTR_COMPRESSION_MASK ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) a->flags & ATTR_IS_ENCRYPTED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) a->flags & ATTR_IS_SPARSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) ntfs_error(sb, "$MFT must be uncompressed, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) "non-sparse, and unencrypted but a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) "compressed/sparse/encrypted extent "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) "was found. $MFT is corrupt. Run "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) "chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) * Decompress the mapping pairs array of this extent and merge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) * the result into the existing runlist. No need for locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) * as we have exclusive access to the inode at this time and we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) * are a mount in progress task, too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) nrl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) if (IS_ERR(nrl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) ntfs_error(sb, "ntfs_mapping_pairs_decompress() "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) "failed with error code %ld. $MFT is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) "corrupt.", PTR_ERR(nrl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) ni->runlist.rl = nrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) /* Are we in the first extent? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) if (!next_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) if (a->data.non_resident.lowest_vcn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) ntfs_error(sb, "First extent of $DATA "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) "attribute has non zero "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) "lowest_vcn. $MFT is corrupt. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) "You should run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) /* Get the last vcn in the $DATA attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) last_vcn = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) a->data.non_resident.allocated_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) >> vol->cluster_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) /* Fill in the inode size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) vi->i_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) a->data.non_resident.data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) ni->initialized_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) a->data.non_resident.initialized_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) ni->allocated_size = sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) a->data.non_resident.allocated_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) * Verify the number of mft records does not exceed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) * 2^32 - 1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) if ((vi->i_size >> vol->mft_record_size_bits) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) (1ULL << 32)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) ntfs_error(sb, "$MFT is too big! Aborting.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) * We have got the first extent of the runlist for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) * $MFT which means it is now relatively safe to call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) * the normal ntfs_read_inode() function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) * Complete reading the inode, this will actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) * re-read the mft record for $MFT, this time entering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) * it into the page cache with which we complete the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) * kick start of the volume. It should be safe to do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) * this now as the first extent of $MFT/$DATA is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) * already known and we would hope that we don't need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) * further extents in order to find the other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) * attributes belonging to $MFT. Only time will tell if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) * this is really the case. If not we will have to play
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) * magic at this point, possibly duplicating a lot of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) * ntfs_read_inode() at this point. We will need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) * ensure we do enough of its work to be able to call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) * ntfs_read_inode() on extents of $MFT/$DATA. But lets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) * hope this never happens...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) ntfs_read_locked_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) if (is_bad_inode(vi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) ntfs_error(sb, "ntfs_read_inode() of $MFT "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) "failed. BUG or corrupt $MFT. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) "Run chkdsk and if no errors "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) "are found, please report you "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) "saw this message to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) "linux-ntfs-dev@lists."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) "sourceforge.net");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) /* Revert to the safe super operations. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) ntfs_free(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) * Re-initialize some specifics about $MFT's inode as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) * ntfs_read_inode() will have set up the default ones.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) /* Set uid and gid to root. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) vi->i_uid = GLOBAL_ROOT_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) vi->i_gid = GLOBAL_ROOT_GID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) /* Regular file. No access for anyone. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) vi->i_mode = S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) /* No VFS initiated operations allowed for $MFT. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) vi->i_op = &ntfs_empty_inode_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) vi->i_fop = &ntfs_empty_file_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) /* Get the lowest vcn for the next extent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) next_vcn = highest_vcn + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) /* Only one extent or error, which we catch below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) if (next_vcn <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) /* Avoid endless loops due to corruption. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) if (next_vcn < sle64_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) a->data.non_resident.lowest_vcn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) ntfs_error(sb, "$MFT has corrupt attribute list "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) "attribute. Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) if (err != -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) ntfs_error(sb, "Failed to lookup $MFT/$DATA attribute extent. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) "$MFT is corrupt. Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) if (!a) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) ntfs_error(sb, "$MFT/$DATA attribute not found. $MFT is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) "corrupt. Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) if (highest_vcn && highest_vcn != last_vcn - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) ntfs_error(sb, "Failed to load the complete runlist for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) "$MFT/$DATA. Driver bug or corrupt $MFT. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) "Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) ntfs_debug("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) (unsigned long long)highest_vcn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) (unsigned long long)last_vcn - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) goto put_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) ntfs_free(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) * Split the locking rules of the MFT inode from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) * locking rules of other inodes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) em_put_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) ntfs_error(sb, "Couldn't find first extent of $DATA attribute in "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) "attribute list. $MFT is corrupt. Run chkdsk.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) put_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) ntfs_error(sb, "Failed. Marking inode as bad.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) make_bad_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) ntfs_free(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) static void __ntfs_clear_inode(ntfs_inode *ni)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) /* Free all alocated memory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) down_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) if (ni->runlist.rl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) ntfs_free(ni->runlist.rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) ni->runlist.rl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) up_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) if (ni->attr_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) ntfs_free(ni->attr_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) ni->attr_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) down_write(&ni->attr_list_rl.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) if (ni->attr_list_rl.rl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) ntfs_free(ni->attr_list_rl.rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) ni->attr_list_rl.rl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) up_write(&ni->attr_list_rl.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) if (ni->name_len && ni->name != I30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) /* Catch bugs... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) BUG_ON(!ni->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) kfree(ni->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) void ntfs_clear_extent_inode(ntfs_inode *ni)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) BUG_ON(NInoAttr(ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) BUG_ON(ni->nr_extents != -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) #ifdef NTFS_RW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) if (NInoDirty(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) if (!is_bad_inode(VFS_I(ni->ext.base_ntfs_ino)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) ntfs_error(ni->vol->sb, "Clearing dirty extent inode! "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) "Losing data! This is a BUG!!!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) // FIXME: Do something!!!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) #endif /* NTFS_RW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) __ntfs_clear_inode(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226) /* Bye, bye... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) ntfs_destroy_extent_inode(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) * ntfs_evict_big_inode - clean up the ntfs specific part of an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) * @vi: vfs inode pending annihilation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) * When the VFS is going to remove an inode from memory, ntfs_clear_big_inode()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) * is called, which deallocates all memory belonging to the NTFS specific part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) * of the inode and returns.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) * If the MFT record is dirty, we commit it before doing anything else.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) void ntfs_evict_big_inode(struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) ntfs_inode *ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) truncate_inode_pages_final(&vi->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) clear_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) #ifdef NTFS_RW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) if (NInoDirty(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) bool was_bad = (is_bad_inode(vi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) /* Committing the inode also commits all extent inodes. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) ntfs_commit_inode(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) if (!was_bad && (is_bad_inode(vi) || NInoDirty(ni))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) ntfs_error(vi->i_sb, "Failed to commit dirty inode "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) "0x%lx. Losing data!", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) // FIXME: Do something!!!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) #endif /* NTFS_RW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) /* No need to lock at this stage as no one else has a reference. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) if (ni->nr_extents > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) for (i = 0; i < ni->nr_extents; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) kfree(ni->ext.extent_ntfs_inos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) __ntfs_clear_inode(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) if (NInoAttr(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) /* Release the base inode if we are holding it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) if (ni->nr_extents == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) iput(VFS_I(ni->ext.base_ntfs_ino));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) ni->nr_extents = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) ni->ext.base_ntfs_ino = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) BUG_ON(ni->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) if (!atomic_dec_and_test(&ni->count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) * ntfs_show_options - show mount options in /proc/mounts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) * @sf: seq_file in which to write our mount options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) * @root: root of the mounted tree whose mount options to display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) * Called by the VFS once for each mounted ntfs volume when someone reads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) * /proc/mounts in order to display the NTFS specific mount options of each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) * mount. The mount options of fs specified by @root are written to the seq file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) * @sf and success is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) int ntfs_show_options(struct seq_file *sf, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) ntfs_volume *vol = NTFS_SB(root->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) seq_printf(sf, ",uid=%i", from_kuid_munged(&init_user_ns, vol->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) seq_printf(sf, ",gid=%i", from_kgid_munged(&init_user_ns, vol->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) if (vol->fmask == vol->dmask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) seq_printf(sf, ",umask=0%o", vol->fmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) seq_printf(sf, ",fmask=0%o", vol->fmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) seq_printf(sf, ",dmask=0%o", vol->dmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) seq_printf(sf, ",nls=%s", vol->nls_map->charset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) if (NVolCaseSensitive(vol))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) seq_printf(sf, ",case_sensitive");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) if (NVolShowSystemFiles(vol))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) seq_printf(sf, ",show_sys_files");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) if (!NVolSparseEnabled(vol))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) seq_printf(sf, ",disable_sparse");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) for (i = 0; on_errors_arr[i].val; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) if (on_errors_arr[i].val & vol->on_errors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) seq_printf(sf, ",errors=%s", on_errors_arr[i].str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) seq_printf(sf, ",mft_zone_multiplier=%i", vol->mft_zone_multiplier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) #ifdef NTFS_RW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) static const char *es = " Leaving inconsistent metadata. Unmount and run "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328) "chkdsk.";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) * ntfs_truncate - called when the i_size of an ntfs inode is changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) * @vi: inode for which the i_size was changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) * We only support i_size changes for normal files at present, i.e. not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) * compressed and not encrypted. This is enforced in ntfs_setattr(), see
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) * below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) * that the change is allowed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) * This implies for us that @vi is a file inode rather than a directory, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342) * or attribute inode as well as that @vi is a base inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) * Returns 0 on success or -errno on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) * Called with ->i_mutex held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) int ntfs_truncate(struct inode *vi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) VCN highest_vcn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) ntfs_inode *base_ni, *ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) ntfs_volume *vol = ni->vol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356) MFT_RECORD *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) ATTR_RECORD *a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) const char *te = " Leaving file length out of sync with i_size.";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) int err, mp_size, size_change, alloc_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) u32 attr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) BUG_ON(NInoAttr(ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) BUG_ON(S_ISDIR(vi->i_mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) BUG_ON(NInoMstProtected(ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) BUG_ON(ni->nr_extents < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) retry_truncate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) * Lock the runlist for writing and map the mft record to ensure it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) * safe to mess with the attribute runlist and sizes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) down_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) if (!NInoAttr(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) base_ni = ni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) base_ni = ni->ext.base_ntfs_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) m = map_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) if (IS_ERR(m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) err = PTR_ERR(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) "(error code %d).%s", vi->i_ino, err, te);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) ctx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) m = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) goto old_bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) ctx = ntfs_attr_get_search_ctx(base_ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) if (unlikely(!ctx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) ntfs_error(vi->i_sb, "Failed to allocate a search context for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) "inode 0x%lx (not enough memory).%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) vi->i_ino, te);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) goto old_bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) if (err == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) ntfs_error(vi->i_sb, "Open attribute is missing from "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) "mft record. Inode 0x%lx is corrupt. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) "Run chkdsk.%s", vi->i_ino, te);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) ntfs_error(vi->i_sb, "Failed to lookup attribute in "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) "inode 0x%lx (error code %d).%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) vi->i_ino, err, te);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) goto old_bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) m = ctx->mrec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) * The i_size of the vfs inode is the new size for the attribute value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) new_size = i_size_read(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) /* The current size of the attribute value is the old size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) old_size = ntfs_attr_size(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) /* Calculate the new allocated size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) if (NInoNonResident(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) new_alloc_size = (new_size + vol->cluster_size - 1) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) ~(s64)vol->cluster_size_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) new_alloc_size = (new_size + 7) & ~7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) /* The current allocated size is the old allocated size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) read_lock_irqsave(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) old_alloc_size = ni->allocated_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) read_unlock_irqrestore(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) * The change in the file size. This will be 0 if no change, >0 if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428) * size is growing, and <0 if the size is shrinking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) size_change = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) if (new_size - old_size >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) size_change = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433) if (new_size == old_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) size_change = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) /* As above for the allocated size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) alloc_change = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) if (new_alloc_size - old_alloc_size >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) alloc_change = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) if (new_alloc_size == old_alloc_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) alloc_change = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444) * If neither the size nor the allocation are being changed there is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) * nothing to do.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) if (!size_change && !alloc_change)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) goto unm_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) /* If the size is changing, check if new size is allowed in $AttrDef. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) if (size_change) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) if (err == -ERANGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) ntfs_error(vol->sb, "Truncate would cause the "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) "inode 0x%lx to %simum size "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) "for its attribute type "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) "(0x%x). Aborting truncate.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) new_size > old_size ? "exceed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460) "the max" : "go under the min",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) le32_to_cpu(ni->type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) err = -EFBIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) ntfs_error(vol->sb, "Inode 0x%lx has unknown "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) "attribute type 0x%x. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) "Aborting truncate.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) le32_to_cpu(ni->type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) /* Reset the vfs inode size to the old size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) i_size_write(vi, old_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) if (NInoCompressed(ni) || NInoEncrypted(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) ntfs_warning(vi->i_sb, "Changes in inode size are not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) "supported yet for %s files, ignoring.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) NInoCompressed(ni) ? "compressed" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) "encrypted");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) goto bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) if (a->non_resident)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) goto do_non_resident_truncate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) BUG_ON(NInoNonResident(ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) /* Resize the attribute record to best fit the new attribute size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) if (new_size < vol->mft_record_size &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) !ntfs_resident_attr_value_resize(m, a, new_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) /* The resize succeeded! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) flush_dcache_mft_record_page(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) mark_mft_record_dirty(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) write_lock_irqsave(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) /* Update the sizes in the ntfs inode and all is done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) ni->allocated_size = le32_to_cpu(a->length) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) le16_to_cpu(a->data.resident.value_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) * Note ntfs_resident_attr_value_resize() has already done any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) * necessary data clearing in the attribute record. When the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) * file is being shrunk vmtruncate() will already have cleared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) * the top part of the last partial page, i.e. since this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) * the resident case this is the page with index 0. However,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) * when the file is being expanded, the page cache page data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) * between the old data_size, i.e. old_size, and the new_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) * has not been zeroed. Fortunately, we do not need to zero it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) * either since on one hand it will either already be zero due
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) * to both readpage and writepage clearing partial page data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) * beyond i_size in which case there is nothing to do or in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) * case of the file being mmap()ped at the same time, POSIX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) * specifies that the behaviour is unspecified thus we do not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) * have to do anything. This means that in our implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) * in the rare case that the file is mmap()ped and a write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) * occurred into the mmap()ped region just beyond the file size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) * and writepage has not yet been called to write out the page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) * (which would clear the area beyond the file size) and we now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) * extend the file size to incorporate this dirty region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) * outside the file size, a write of the page would result in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) * this data being written to disk instead of being cleared.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) * Given both POSIX and the Linux mmap(2) man page specify that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) * this corner case is undefined, we choose to leave it like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521) * that as this is much simpler for us as we cannot lock the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) * relevant page now since we are holding too many ntfs locks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) * which would result in a lock reversal deadlock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) ni->initialized_size = new_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526) write_unlock_irqrestore(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) goto unm_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) /* If the above resize failed, this must be an attribute extension. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) BUG_ON(size_change < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532) * We have to drop all the locks so we can call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) * ntfs_attr_make_non_resident(). This could be optimised by try-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534) * locking the first page cache page and only if that fails dropping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) * the locks, locking the page, and redoing all the locking and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536) * lookups. While this would be a huge optimisation, it is not worth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537) * it as this is definitely a slow code path as it only ever can happen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) * once for any given file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542) up_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) * Not enough space in the mft record, try to make the attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545) * non-resident and if successful restart the truncation process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) err = ntfs_attr_make_non_resident(ni, old_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) if (likely(!err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549) goto retry_truncate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) * Could not make non-resident. If this is due to this not being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552) * permitted for this attribute type or there not being enough space,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) * try to make other attributes non-resident. Otherwise fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555) if (unlikely(err != -EPERM && err != -ENOSPC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556) ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) "type 0x%x, because the conversion from "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) "resident to non-resident attribute failed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559) "with error code %i.", vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) (unsigned)le32_to_cpu(ni->type), err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) if (err != -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563) goto conv_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565) /* TODO: Not implemented from here, abort. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566) if (err == -ENOSPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567) ntfs_error(vol->sb, "Not enough space in the mft record/on "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) "disk for the non-resident attribute value. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569) "This case is not implemented yet.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570) else /* if (err == -EPERM) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2571) ntfs_error(vol->sb, "This attribute type may not be "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2572) "non-resident. This case is not implemented "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2573) "yet.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2574) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2575) goto conv_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2576) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2577) // TODO: Attempt to make other attributes non-resident.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2578) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2579) goto do_resident_extend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2580) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2581) * Both the attribute list attribute and the standard information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2582) * attribute must remain in the base inode. Thus, if this is one of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2583) * these attributes, we have to try to move other attributes out into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2584) * extent mft records instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2585) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2586) if (ni->type == AT_ATTRIBUTE_LIST ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2587) ni->type == AT_STANDARD_INFORMATION) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2588) // TODO: Attempt to move other attributes into extent mft
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2589) // records.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2590) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2591) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2592) goto do_resident_extend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2593) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2595) // TODO: Attempt to move this attribute to an extent mft record, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2596) // only if it is not already the only attribute in an mft record in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2597) // which case there would be nothing to gain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2598) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2599) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2600) goto do_resident_extend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2601) /* There is nothing we can do to make enough space. )-: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2602) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2603) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2604) do_non_resident_truncate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2605) BUG_ON(!NInoNonResident(ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2606) if (alloc_change < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2607) highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2608) if (highest_vcn > 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2609) old_alloc_size >> vol->cluster_size_bits >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2610) highest_vcn + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2611) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2612) * This attribute has multiple extents. Not yet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2613) * supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2615) ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2616) "attribute type 0x%x, because the "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2617) "attribute is highly fragmented (it "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2618) "consists of multiple extents) and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2619) "this case is not implemented yet.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2620) vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2621) (unsigned)le32_to_cpu(ni->type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2622) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2623) goto bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2626) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2627) * If the size is shrinking, need to reduce the initialized_size and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2628) * the data_size before reducing the allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2629) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2630) if (size_change < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2631) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2632) * Make the valid size smaller (i_size is already up-to-date).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2633) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2634) write_lock_irqsave(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2635) if (new_size < ni->initialized_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2636) ni->initialized_size = new_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2637) a->data.non_resident.initialized_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2638) cpu_to_sle64(new_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2640) a->data.non_resident.data_size = cpu_to_sle64(new_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2641) write_unlock_irqrestore(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2642) flush_dcache_mft_record_page(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2643) mark_mft_record_dirty(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2644) /* If the allocated size is not changing, we are done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2645) if (!alloc_change)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2646) goto unm_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2647) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2648) * If the size is shrinking it makes no sense for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2649) * allocation to be growing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2651) BUG_ON(alloc_change > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2652) } else /* if (size_change >= 0) */ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2653) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2654) * The file size is growing or staying the same but the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2655) * allocation can be shrinking, growing or staying the same.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2657) if (alloc_change > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2658) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2659) * We need to extend the allocation and possibly update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2660) * the data size. If we are updating the data size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2661) * since we are not touching the initialized_size we do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2662) * not need to worry about the actual data on disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2663) * And as far as the page cache is concerned, there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2664) * will be no pages beyond the old data size and any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2665) * partial region in the last page between the old and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2666) * new data size (or the end of the page if the new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2667) * data size is outside the page) does not need to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2668) * modified as explained above for the resident
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2669) * attribute truncate case. To do this, we simply drop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2670) * the locks we hold and leave all the work to our
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2671) * friendly helper ntfs_attr_extend_allocation().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2672) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2673) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2674) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2675) up_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2676) err = ntfs_attr_extend_allocation(ni, new_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2677) size_change > 0 ? new_size : -1, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2678) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2679) * ntfs_attr_extend_allocation() will have done error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2680) * output already.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2681) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2682) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2684) if (!alloc_change)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2685) goto alloc_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2687) /* alloc_change < 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2688) /* Free the clusters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2689) nr_freed = ntfs_cluster_free(ni, new_alloc_size >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2690) vol->cluster_size_bits, -1, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2691) m = ctx->mrec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2692) a = ctx->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2693) if (unlikely(nr_freed < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2694) ntfs_error(vol->sb, "Failed to release cluster(s) (error code "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2695) "%lli). Unmount and run chkdsk to recover "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2696) "the lost cluster(s).", (long long)nr_freed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2697) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2698) nr_freed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2700) /* Truncate the runlist. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2701) err = ntfs_rl_truncate_nolock(vol, &ni->runlist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2702) new_alloc_size >> vol->cluster_size_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2703) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2704) * If the runlist truncation failed and/or the search context is no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2705) * longer valid, we cannot resize the attribute record or build the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2706) * mapping pairs array thus we mark the inode bad so that no access to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2707) * the freed clusters can happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2708) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2709) if (unlikely(err || IS_ERR(m))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2710) ntfs_error(vol->sb, "Failed to %s (error code %li).%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2711) IS_ERR(m) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2712) "restore attribute search context" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2713) "truncate attribute runlist",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2714) IS_ERR(m) ? PTR_ERR(m) : err, es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2715) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2716) goto bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2718) /* Get the size for the shrunk mapping pairs array for the runlist. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2719) mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2720) if (unlikely(mp_size <= 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2721) ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2722) "attribute type 0x%x, because determining the "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2723) "size for the mapping pairs failed with error "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2724) "code %i.%s", vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2725) (unsigned)le32_to_cpu(ni->type), mp_size, es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2726) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2727) goto bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2729) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2730) * Shrink the attribute record for the new mapping pairs array. Note,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2731) * this cannot fail since we are making the attribute smaller thus by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2732) * definition there is enough space to do so.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2733) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2734) attr_len = le32_to_cpu(a->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2735) err = ntfs_attr_record_resize(m, a, mp_size +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2736) le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2737) BUG_ON(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2738) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2739) * Generate the mapping pairs array directly into the attribute record.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2740) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2741) err = ntfs_mapping_pairs_build(vol, (u8*)a +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2742) le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2743) mp_size, ni->runlist.rl, 0, -1, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2744) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2745) ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2746) "attribute type 0x%x, because building the "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2747) "mapping pairs failed with error code %i.%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2748) vi->i_ino, (unsigned)le32_to_cpu(ni->type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2749) err, es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2750) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2751) goto bad_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2752) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2753) /* Update the allocated/compressed size as well as the highest vcn. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2754) a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2755) vol->cluster_size_bits) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2756) write_lock_irqsave(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2757) ni->allocated_size = new_alloc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2758) a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2759) if (NInoSparse(ni) || NInoCompressed(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2760) if (nr_freed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2761) ni->itype.compressed.size -= nr_freed <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2762) vol->cluster_size_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2763) BUG_ON(ni->itype.compressed.size < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2764) a->data.non_resident.compressed_size = cpu_to_sle64(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2765) ni->itype.compressed.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2766) vi->i_blocks = ni->itype.compressed.size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2768) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2769) vi->i_blocks = new_alloc_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2770) write_unlock_irqrestore(&ni->size_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2771) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2772) * We have shrunk the allocation. If this is a shrinking truncate we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2773) * have already dealt with the initialized_size and the data_size above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2774) * and we are done. If the truncate is only changing the allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2775) * and not the data_size, we are also done. If this is an extending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2776) * truncate, need to extend the data_size now which is ensured by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2777) * fact that @size_change is positive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2778) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2779) alloc_done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2780) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2781) * If the size is growing, need to update it now. If it is shrinking,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2782) * we have already updated it above (before the allocation change).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2783) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2784) if (size_change > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2785) a->data.non_resident.data_size = cpu_to_sle64(new_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2786) /* Ensure the modified mft record is written out. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2787) flush_dcache_mft_record_page(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2788) mark_mft_record_dirty(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2789) unm_done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2790) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2791) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2792) up_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2793) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2794) /* Update the mtime and ctime on the base inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2795) /* normally ->truncate shouldn't update ctime or mtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2796) * but ntfs did before so it got a copy & paste version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2797) * of file_update_time. one day someone should fix this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2798) * for real.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2799) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2800) if (!IS_NOCMTIME(VFS_I(base_ni)) && !IS_RDONLY(VFS_I(base_ni))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2801) struct timespec64 now = current_time(VFS_I(base_ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2802) int sync_it = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2804) if (!timespec64_equal(&VFS_I(base_ni)->i_mtime, &now) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2805) !timespec64_equal(&VFS_I(base_ni)->i_ctime, &now))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2806) sync_it = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2807) VFS_I(base_ni)->i_mtime = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2808) VFS_I(base_ni)->i_ctime = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2810) if (sync_it)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2811) mark_inode_dirty_sync(VFS_I(base_ni));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2814) if (likely(!err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2815) NInoClearTruncateFailed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2816) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2818) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2819) old_bad_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2820) old_size = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2821) bad_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2822) if (err != -ENOMEM && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2823) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2824) if (err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2825) NInoSetTruncateFailed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2826) else if (old_size >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2827) i_size_write(vi, old_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2828) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2829) if (ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2830) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2831) if (m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2832) unmap_mft_record(base_ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2833) up_write(&ni->runlist.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2834) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2835) ntfs_debug("Failed. Returning error code %i.", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2836) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2837) conv_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2838) if (err != -ENOMEM && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2839) NVolSetErrors(vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2840) if (err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2841) NInoSetTruncateFailed(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2842) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2843) i_size_write(vi, old_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2844) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2847) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2848) * ntfs_truncate_vfs - wrapper for ntfs_truncate() that has no return value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2849) * @vi: inode for which the i_size was changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2850) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2851) * Wrapper for ntfs_truncate() that has no return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2852) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2853) * See ntfs_truncate() description above for details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2854) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2855) #ifdef NTFS_RW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2856) void ntfs_truncate_vfs(struct inode *vi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2857) ntfs_truncate(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2859) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2861) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2862) * ntfs_setattr - called from notify_change() when an attribute is being changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2863) * @dentry: dentry whose attributes to change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2864) * @attr: structure describing the attributes and the changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2865) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2866) * We have to trap VFS attempts to truncate the file described by @dentry as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2867) * soon as possible, because we do not implement changes in i_size yet. So we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2868) * abort all i_size changes here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2869) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2870) * We also abort all changes of user, group, and mode as we do not implement
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2871) * the NTFS ACLs yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2872) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2873) * Called with ->i_mutex held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2874) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2875) int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2876) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2877) struct inode *vi = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2878) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2879) unsigned int ia_valid = attr->ia_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2881) err = setattr_prepare(dentry, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2882) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2883) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2884) /* We do not support NTFS ACLs yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2885) if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2886) ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2887) "supported yet, ignoring.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2888) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2889) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2891) if (ia_valid & ATTR_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2892) if (attr->ia_size != i_size_read(vi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2893) ntfs_inode *ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2894) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2895) * FIXME: For now we do not support resizing of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2896) * compressed or encrypted files yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2897) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2898) if (NInoCompressed(ni) || NInoEncrypted(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2899) ntfs_warning(vi->i_sb, "Changes in inode size "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2900) "are not supported yet for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2901) "%s files, ignoring.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2902) NInoCompressed(ni) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2903) "compressed" : "encrypted");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2904) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2905) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2906) truncate_setsize(vi, attr->ia_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2907) ntfs_truncate_vfs(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2908) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2909) if (err || ia_valid == ATTR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2910) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2911) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2912) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2913) * We skipped the truncate but must still update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2914) * timestamps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2915) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2916) ia_valid |= ATTR_MTIME | ATTR_CTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2917) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2918) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2919) if (ia_valid & ATTR_ATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2920) vi->i_atime = attr->ia_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2921) if (ia_valid & ATTR_MTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2922) vi->i_mtime = attr->ia_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2923) if (ia_valid & ATTR_CTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2924) vi->i_ctime = attr->ia_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2925) mark_inode_dirty(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2926) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2927) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2930) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2931) * ntfs_write_inode - write out a dirty inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2932) * @vi: inode to write out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2933) * @sync: if true, write out synchronously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2934) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2935) * Write out a dirty inode to disk including any extent inodes if present.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2936) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2937) * If @sync is true, commit the inode to disk and wait for io completion. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2938) * is done using write_mft_record().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2939) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2940) * If @sync is false, just schedule the write to happen but do not wait for i/o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2941) * completion. In 2.6 kernels, scheduling usually happens just by virtue of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2942) * marking the page (and in this case mft record) dirty but we do not implement
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2943) * this yet as write_mft_record() largely ignores the @sync parameter and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2944) * always performs synchronous writes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2945) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2946) * Return 0 on success and -errno on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2947) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2948) int __ntfs_write_inode(struct inode *vi, int sync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2949) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2950) sle64 nt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2951) ntfs_inode *ni = NTFS_I(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2952) ntfs_attr_search_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2953) MFT_RECORD *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2954) STANDARD_INFORMATION *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2955) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2956) bool modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2958) ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2959) vi->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2960) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2961) * Dirty attribute inodes are written via their real inodes so just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2962) * clean them here. Access time updates are taken care off when the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2963) * real inode is written.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2964) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2965) if (NInoAttr(ni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2966) NInoClearDirty(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2967) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2968) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2970) /* Map, pin, and lock the mft record belonging to the inode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2971) m = map_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2972) if (IS_ERR(m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2973) err = PTR_ERR(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2974) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2975) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2976) /* Update the access times in the standard information attribute. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2977) ctx = ntfs_attr_get_search_ctx(ni, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2978) if (unlikely(!ctx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2979) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2980) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2982) err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2983) CASE_SENSITIVE, 0, NULL, 0, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2984) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2985) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2986) goto unm_err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2988) si = (STANDARD_INFORMATION*)((u8*)ctx->attr +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2989) le16_to_cpu(ctx->attr->data.resident.value_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2990) /* Update the access times if they have changed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2991) nt = utc2ntfs(vi->i_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2992) if (si->last_data_change_time != nt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2993) ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2994) "new = 0x%llx", vi->i_ino, (long long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2995) sle64_to_cpu(si->last_data_change_time),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2996) (long long)sle64_to_cpu(nt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2997) si->last_data_change_time = nt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2998) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2999) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3000) nt = utc2ntfs(vi->i_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3001) if (si->last_mft_change_time != nt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3002) ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3003) "new = 0x%llx", vi->i_ino, (long long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3004) sle64_to_cpu(si->last_mft_change_time),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3005) (long long)sle64_to_cpu(nt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3006) si->last_mft_change_time = nt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3007) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3008) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3009) nt = utc2ntfs(vi->i_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3010) if (si->last_access_time != nt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3011) ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3012) "new = 0x%llx", vi->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3013) (long long)sle64_to_cpu(si->last_access_time),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3014) (long long)sle64_to_cpu(nt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3015) si->last_access_time = nt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3016) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3018) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3019) * If we just modified the standard information attribute we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3020) * mark the mft record it is in dirty. We do this manually so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3021) * mark_inode_dirty() is not called which would redirty the inode and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3022) * hence result in an infinite loop of trying to write the inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3023) * There is no need to mark the base inode nor the base mft record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3024) * dirty, since we are going to write this mft record below in any case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3025) * and the base mft record may actually not have been modified so it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3026) * might not need to be written out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3027) * NOTE: It is not a problem when the inode for $MFT itself is being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3028) * written out as mark_ntfs_record_dirty() will only set I_DIRTY_PAGES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3029) * on the $MFT inode and hence ntfs_write_inode() will not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3030) * re-invoked because of it which in turn is ok since the dirtied mft
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3031) * record will be cleaned and written out to disk below, i.e. before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3032) * this function returns.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3033) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3034) if (modified) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3035) flush_dcache_mft_record_page(ctx->ntfs_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3036) if (!NInoTestSetDirty(ctx->ntfs_ino))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3037) mark_ntfs_record_dirty(ctx->ntfs_ino->page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3038) ctx->ntfs_ino->page_ofs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3039) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3040) ntfs_attr_put_search_ctx(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3041) /* Now the access times are updated, write the base mft record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3042) if (NInoDirty(ni))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3043) err = write_mft_record(ni, m, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3044) /* Write all attached extent mft records. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3045) mutex_lock(&ni->extent_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3046) if (ni->nr_extents > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3047) ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3048) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3050) ntfs_debug("Writing %i extent inodes.", ni->nr_extents);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3051) for (i = 0; i < ni->nr_extents; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3052) ntfs_inode *tni = extent_nis[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3054) if (NInoDirty(tni)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3055) MFT_RECORD *tm = map_mft_record(tni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3056) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3058) if (IS_ERR(tm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3059) if (!err || err == -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3060) err = PTR_ERR(tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3061) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3063) ret = write_mft_record(tni, tm, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3064) unmap_mft_record(tni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3065) if (unlikely(ret)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3066) if (!err || err == -ENOMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3067) err = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3068) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3071) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3072) mutex_unlock(&ni->extent_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3073) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3074) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3075) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3076) ntfs_debug("Done.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3077) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3078) unm_err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3079) unmap_mft_record(ni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3080) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3081) if (err == -ENOMEM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3082) ntfs_warning(vi->i_sb, "Not enough memory to write inode. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3083) "Marking the inode dirty again, so the VFS "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3084) "retries later.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3085) mark_inode_dirty(vi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3086) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3087) ntfs_error(vi->i_sb, "Failed (error %i): Run chkdsk.", -err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3088) NVolSetErrors(ni->vol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3089) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3090) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3093) #endif /* NTFS_RW */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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