^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * namei.c - NILFS pathname lookup operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Modified for NILFS by Amagai Yoshiji and Ryusuke Konishi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * linux/fs/ext2/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Copyright (C) 1992, 1993, 1994, 1995
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Remy Card (card@masi.ibp.fr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Laboratoire MASI - Institut Blaise Pascal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Universite Pierre et Marie Curie (Paris VI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * linux/fs/minix/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Copyright (C) 1991, 1992 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Big-endian to little-endian byte-swapping/bitmaps by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * David S. Miller (davem@caip.rutgers.edu), 1995
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "nilfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "export.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define NILFS_FID_SIZE_NON_CONNECTABLE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) (offsetof(struct nilfs_fid, parent_gen) / 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define NILFS_FID_SIZE_CONNECTABLE (sizeof(struct nilfs_fid) / 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int err = nilfs_add_link(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) d_instantiate_new(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * Methods themselves.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) nilfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ino_t ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (dentry->d_name.len > NILFS_NAME_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ino = nilfs_inode_by_name(dir, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) inode = ino ? nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * By the time this is called, we already have created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * the directory cache entry for the new file, but it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * is so far negative - it has no inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * If the create succeeds, we fill in the inode information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * with d_instantiate().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static int nilfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) bool excl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) inode = nilfs_new_inode(dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) inode->i_op = &nilfs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) inode->i_fop = &nilfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) inode->i_mapping->a_ops = &nilfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) err = nilfs_add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) nilfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) inode = nilfs_new_inode(dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (!IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) init_special_inode(inode, inode->i_mode, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) err = nilfs_add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int nilfs_symlink(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) const char *symname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) unsigned int l = strlen(symname) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (l > sb->s_blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) inode = nilfs_new_inode(dir, S_IFLNK | 0777);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* slow symlink */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) inode->i_op = &nilfs_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) inode_nohighmem(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) inode->i_mapping->a_ops = &nilfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) err = page_symlink(inode, symname, l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* mark_inode_dirty(inode); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* page_symlink() do this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) err = nilfs_add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct inode *inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) inode_inc_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ihold(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) err = nilfs_add_link(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int nilfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) inc_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) inode = nilfs_new_inode(dir, S_IFDIR | mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) inode->i_op = &nilfs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) inode->i_fop = &nilfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) inode->i_mapping->a_ops = &nilfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) err = nilfs_make_empty(inode, dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) err = nilfs_add_link(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) d_instantiate_new(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) out_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) drop_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) nilfs_mark_inode_dirty(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static int nilfs_do_unlink(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct nilfs_dir_entry *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) de = nilfs_find_entry(dir, &dentry->d_name, &page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (!de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (le64_to_cpu(de->inode) != inode->i_ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (!inode->i_nlink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) nilfs_warn(inode->i_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) "deleting nonexistent file (ino=%lu), %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) inode->i_ino, inode->i_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) err = nilfs_delete_entry(de, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) inode->i_ctime = dir->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int nilfs_unlink(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) err = nilfs_transaction_begin(dir->i_sb, &ti, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) err = nilfs_do_unlink(dir, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) nilfs_mark_inode_dirty(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) nilfs_mark_inode_dirty(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static int nilfs_rmdir(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) err = nilfs_transaction_begin(dir->i_sb, &ti, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) err = -ENOTEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (nilfs_empty_dir(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) err = nilfs_do_unlink(dir, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) nilfs_mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) drop_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) nilfs_mark_inode_dirty(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) err = nilfs_transaction_commit(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) nilfs_transaction_abort(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return err;
^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 int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct inode *new_dir, struct dentry *new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct inode *old_inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) struct inode *new_inode = d_inode(new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) struct page *dir_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct nilfs_dir_entry *dir_de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct page *old_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct nilfs_dir_entry *old_de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) struct nilfs_transaction_info ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (flags & ~RENAME_NOREPLACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) err = nilfs_transaction_begin(old_dir->i_sb, &ti, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (!old_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (S_ISDIR(old_inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) dir_de = nilfs_dotdot(old_inode, &dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (!dir_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto out_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (new_inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) struct page *new_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct nilfs_dir_entry *new_de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) err = -ENOTEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (dir_de && !nilfs_empty_dir(new_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (!new_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) nilfs_set_link(new_dir, new_de, new_page, old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) nilfs_mark_inode_dirty(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) new_inode->i_ctime = current_time(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (dir_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) drop_nlink(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) drop_nlink(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) nilfs_mark_inode_dirty(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) err = nilfs_add_link(new_dentry, old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (dir_de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) inc_nlink(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) nilfs_mark_inode_dirty(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * Like most other Unix systems, set the ctime for inodes on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * rename.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) old_inode->i_ctime = current_time(old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) nilfs_delete_entry(old_de, old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (dir_de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) nilfs_set_link(old_inode, dir_de, dir_page, new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) drop_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) nilfs_mark_inode_dirty(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) nilfs_mark_inode_dirty(old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) err = nilfs_transaction_commit(old_dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) out_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (dir_de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) kunmap(dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) put_page(dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) out_old:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) kunmap(old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) put_page(old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) nilfs_transaction_abort(old_dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * Export operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) static struct dentry *nilfs_get_parent(struct dentry *child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) unsigned long ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct qstr dotdot = QSTR_INIT("..", 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) struct nilfs_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) ino = nilfs_inode_by_name(d_inode(child), &dotdot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) root = NILFS_I(d_inode(child))->i_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) inode = nilfs_iget(child->d_sb, root, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return ERR_CAST(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return d_obtain_alias(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static struct dentry *nilfs_get_dentry(struct super_block *sb, u64 cno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) u64 ino, u32 gen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct nilfs_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (ino < NILFS_FIRST_INO(sb) && ino != NILFS_ROOT_INO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) root = nilfs_lookup_root(sb->s_fs_info, cno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) inode = nilfs_iget(sb, root, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) nilfs_put_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return ERR_CAST(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (gen && inode->i_generation != gen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return d_obtain_alias(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static struct dentry *nilfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) struct nilfs_fid *fid = (struct nilfs_fid *)fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (fh_len < NILFS_FID_SIZE_NON_CONNECTABLE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) (fh_type != FILEID_NILFS_WITH_PARENT &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) fh_type != FILEID_NILFS_WITHOUT_PARENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return nilfs_get_dentry(sb, fid->cno, fid->ino, fid->gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static struct dentry *nilfs_fh_to_parent(struct super_block *sb, struct fid *fh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct nilfs_fid *fid = (struct nilfs_fid *)fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (fh_len < NILFS_FID_SIZE_CONNECTABLE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) fh_type != FILEID_NILFS_WITH_PARENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return nilfs_get_dentry(sb, fid->cno, fid->parent_ino, fid->parent_gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static int nilfs_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct inode *parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) struct nilfs_fid *fid = (struct nilfs_fid *)fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) struct nilfs_root *root = NILFS_I(inode)->i_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (parent && *lenp < NILFS_FID_SIZE_CONNECTABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) *lenp = NILFS_FID_SIZE_CONNECTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return FILEID_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (*lenp < NILFS_FID_SIZE_NON_CONNECTABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) *lenp = NILFS_FID_SIZE_NON_CONNECTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return FILEID_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) fid->cno = root->cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) fid->ino = inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) fid->gen = inode->i_generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) fid->parent_ino = parent->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) fid->parent_gen = parent->i_generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) type = FILEID_NILFS_WITH_PARENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) *lenp = NILFS_FID_SIZE_CONNECTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) type = FILEID_NILFS_WITHOUT_PARENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) *lenp = NILFS_FID_SIZE_NON_CONNECTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) return type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) const struct inode_operations nilfs_dir_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) .create = nilfs_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) .lookup = nilfs_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) .link = nilfs_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) .unlink = nilfs_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) .symlink = nilfs_symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) .mkdir = nilfs_mkdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) .rmdir = nilfs_rmdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) .mknod = nilfs_mknod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) .rename = nilfs_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) .setattr = nilfs_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) .permission = nilfs_permission,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) .fiemap = nilfs_fiemap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) const struct inode_operations nilfs_special_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) .setattr = nilfs_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) .permission = nilfs_permission,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) const struct inode_operations nilfs_symlink_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) .get_link = page_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) .permission = nilfs_permission,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) const struct export_operations nilfs_export_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) .encode_fh = nilfs_encode_fh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) .fh_to_dentry = nilfs_fh_to_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) .fh_to_parent = nilfs_fh_to_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) .get_parent = nilfs_get_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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