^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/befs/linuxvfs.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/nls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/cred.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/exportfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "befs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "btree.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "datastream.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "super.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) MODULE_DESCRIPTION("BeOS File System (BeFS) driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_AUTHOR("Will Dyson");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* The units the vfs expects inode->i_blocks to be in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define VFS_BLOCK_SIZE 512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int befs_readdir(struct file *, struct dir_context *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int befs_readpage(struct file *file, struct page *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static sector_t befs_bmap(struct address_space *mapping, sector_t block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static struct dentry *befs_lookup(struct inode *, struct dentry *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct inode *befs_iget(struct super_block *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct inode *befs_alloc_inode(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static void befs_free_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void befs_destroy_inodecache(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int befs_symlink_readpage(struct file *, struct page *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) char **out, int *out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) char **out, int *out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static void befs_put_super(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int befs_remount(struct super_block *, int *, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int befs_statfs(struct dentry *, struct kstatfs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int befs_show_options(struct seq_file *, struct dentry *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int parse_options(char *, struct befs_mount_options *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static struct dentry *befs_fh_to_dentry(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct fid *fid, int fh_len, int fh_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static struct dentry *befs_fh_to_parent(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct fid *fid, int fh_len, int fh_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static struct dentry *befs_get_parent(struct dentry *child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static const struct super_operations befs_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .alloc_inode = befs_alloc_inode, /* allocate a new inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .free_inode = befs_free_inode, /* deallocate an inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .put_super = befs_put_super, /* uninit super */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .statfs = befs_statfs, /* statfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .remount_fs = befs_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .show_options = befs_show_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* slab cache for befs_inode_info objects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static struct kmem_cache *befs_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static const struct file_operations befs_dir_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .read = generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .iterate_shared = befs_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static const struct inode_operations befs_dir_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .lookup = befs_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const struct address_space_operations befs_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .readpage = befs_readpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .bmap = befs_bmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static const struct address_space_operations befs_symlink_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .readpage = befs_symlink_readpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static const struct export_operations befs_export_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .fh_to_dentry = befs_fh_to_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .fh_to_parent = befs_fh_to_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .get_parent = befs_get_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * Called by generic_file_read() to read a page of data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * In turn, simply calls a generic block read function and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * passes it the address of befs_get_block, for mapping file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * positions to disk blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) befs_readpage(struct file *file, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return block_read_full_page(page, befs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static sector_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) befs_bmap(struct address_space *mapping, sector_t block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return generic_block_bmap(mapping, block, befs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * Generic function to map a file position (block) to a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * disk offset (passed back in bh_result).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Used by many higher level functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * Calls befs_fblock2brun() in datastream.c to do the real work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) befs_get_block(struct inode *inode, sector_t block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct buffer_head *bh_result, int create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) befs_block_run run = BAD_IADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ulong disk_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) (unsigned long)inode->i_ino, (long)block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (create) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) befs_error(sb, "befs_get_block() was asked to write to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) "block %ld in inode %lu", (long)block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) (unsigned long)inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) res = befs_fblock2brun(sb, ds, block, &run);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (res != BEFS_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) befs_error(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) "<--- %s for inode %lu, block %ld ERROR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) __func__, (unsigned long)inode->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) (long)block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return -EFBIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) disk_off = (ulong) iaddr2blockno(sb, &run);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) map_bh(bh_result, inode->i_sb, disk_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) __func__, (unsigned long)inode->i_ino, (long)block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) (unsigned long)disk_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) befs_off_t offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int utfnamelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) char *utfname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) const char *name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) befs_debug(sb, "---> %s name %pd inode %ld", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dentry, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* Convert to UTF-8 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (BEFS_SB(sb)->nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ret =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) befs_debug(sb, "<--- %s ERROR", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) ret = befs_btree_find(sb, ds, utfname, &offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kfree(utfname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) ret = befs_btree_find(sb, ds, name, &offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (ret == BEFS_BT_NOT_FOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) befs_debug(sb, "<--- %s %pd not found", __func__, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) } else if (ret != BEFS_OK || offset == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) befs_error(sb, "<--- %s Error", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) inode = ERR_PTR(-ENODATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) inode = befs_iget(dir->i_sb, (ino_t) offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) befs_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) const befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) befs_off_t value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) size_t keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) char keybuf[BEFS_NAME_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) __func__, file, inode->i_ino, ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) keybuf, &keysize, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (result == BEFS_ERR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) befs_debug(sb, "<--- %s ERROR", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) befs_error(sb, "IO error reading %pD (inode %lu)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) file, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) } else if (result == BEFS_BT_END) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) befs_debug(sb, "<--- %s END", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) } else if (result == BEFS_BT_EMPTY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) befs_debug(sb, "<--- %s Empty directory", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /* Convert to NLS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (BEFS_SB(sb)->nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) char *nlsname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int nlsnamelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) result =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) befs_utf2nls(sb, keybuf, keysize, &nlsname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) &nlsnamelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (result < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) befs_debug(sb, "<--- %s ERROR", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (!dir_emit(ctx, nlsname, nlsnamelen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) (ino_t) value, DT_UNKNOWN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) kfree(nlsname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) kfree(nlsname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (!dir_emit(ctx, keybuf, keysize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) (ino_t) value, DT_UNKNOWN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) ctx->pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static struct inode *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) befs_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct befs_inode_info *bi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (!bi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return &bi->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static void befs_free_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static void init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct befs_inode_info *bi = (struct befs_inode_info *) foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) inode_init_once(&bi->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) befs_inode *raw_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct befs_sb_info *befs_sb = BEFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) struct befs_inode_info *befs_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) befs_debug(sb, "---> %s inode = %lu", __func__, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) befs_ino = BEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* convert from vfs's inode number to befs's inode number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) befs_debug(sb, " real inode number [%u, %hu, %hu]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) befs_ino->i_inode_num.allocation_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) befs_ino->i_inode_num.start, befs_ino->i_inode_num.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) bh = sb_bread(sb, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) befs_error(sb, "unable to read inode block - "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) "inode = %lu", inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) goto unacquire_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) raw_inode = (befs_inode *) bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) befs_dump_inode(sb, raw_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) befs_error(sb, "Bad inode: %lu", inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) goto unacquire_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * set uid and gid. But since current BeOS is single user OS, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * you can change by "uid" or "gid" options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) inode->i_uid = befs_sb->mount_opts.use_uid ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) befs_sb->mount_opts.uid :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) inode->i_gid = befs_sb->mount_opts.use_gid ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) befs_sb->mount_opts.gid :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) set_nlink(inode, 1);
^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) * BEFS's time is 64 bits, but current VFS is 32 bits...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * BEFS don't have access time. Nor inode change time. VFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * doesn't have creation time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * Also, the lower 16 bits of the last_modified_time and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * create_time are just a counter to help ensure uniqueness
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * for indexing purposes. (PFD, page 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) inode->i_mtime.tv_sec =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) inode->i_ctime = inode->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) inode->i_atime = inode->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) BEFS_SYMLINK_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) int num_blks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) befs_ino->i_data.ds =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) fsds_to_cpu(sb, &raw_inode->data.datastream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) inode->i_blocks =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) inode->i_size = befs_ino->i_data.ds.size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) inode->i_mapping->a_ops = &befs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) inode->i_fop = &generic_ro_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) } else if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) inode->i_op = &befs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) inode->i_fop = &befs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) } else if (S_ISLNK(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) inode->i_op = &page_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) inode_nohighmem(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) inode->i_mapping->a_ops = &befs_symlink_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) inode->i_link = befs_ino->i_data.symlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) inode->i_op = &simple_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) befs_error(sb, "Inode %lu is not a regular file, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) "directory or symlink. THAT IS WRONG! BeFS has no "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) "on disk special files", inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) goto unacquire_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) unacquire_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) unacquire_none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) befs_debug(sb, "<--- %s - Bad inode", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* Initialize the inode cache. Called at fs setup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * Taken from NFS implementation by Al Viro.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) befs_init_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) befs_inode_cachep = kmem_cache_create_usercopy("befs_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) sizeof(struct befs_inode_info), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) SLAB_ACCOUNT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) offsetof(struct befs_inode_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) i_data.symlink),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) sizeof_field(struct befs_inode_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) i_data.symlink),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (befs_inode_cachep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* Called at fs teardown.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * Taken from NFS implementation by Al Viro.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) befs_destroy_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) kmem_cache_destroy(befs_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * The inode of symbolic link is different to data stream.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * The data stream become link name. Unless the LONG_SYMLINK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * flag is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static int befs_symlink_readpage(struct file *unused, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct inode *inode = page->mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct befs_inode_info *befs_ino = BEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) befs_data_stream *data = &befs_ino->i_data.ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) befs_off_t len = data->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) char *link = page_address(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (len == 0 || len > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) befs_error(sb, "Long symlink with illegal length");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) befs_debug(sb, "Follow long symlink");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (befs_read_lsymlink(sb, data, link, len) != len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) befs_error(sb, "Failed to read entire long symlink");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) link[len - 1] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) SetPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) SetPageError(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) * UTF-8 to NLS charset convert routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * Uses uni2char() / char2uni() rather than the nls tables directly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) befs_utf2nls(struct super_block *sb, const char *in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) int in_len, char **out, int *out_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) struct nls_table *nls = BEFS_SB(sb)->nls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) int i, o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) unicode_t uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int unilen, utflen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) char *result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /* The utf8->nls conversion won't make the final nls string bigger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * than the utf one, but if the string is pure ascii they'll have the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * same width and an extra char is needed to save the additional \0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) int maxlen = in_len + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) befs_debug(sb, "---> %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (!nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) befs_error(sb, "%s called with no NLS table loaded", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) *out = result = kmalloc(maxlen, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (!*out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) for (i = o = 0; i < in_len; i += utflen, o += unilen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) /* convert from UTF-8 to Unicode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) utflen = utf8_to_utf32(&in[i], in_len - i, &uni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (utflen < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) goto conv_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /* convert from Unicode to nls */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (uni > MAX_WCHAR_T)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) goto conv_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) unilen = nls->uni2char(uni, &result[o], in_len - o);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (unilen < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) goto conv_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) result[o] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) *out_len = o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) conv_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) befs_error(sb, "Name using character set %s contains a character that "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) "cannot be converted to unicode.", nls->charset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) kfree(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return -EILSEQ;
^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) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * befs_nls2utf - Convert NLS string to utf8 encodeing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * @sb: Superblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * @in: Input string buffer in NLS format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @in_len: Length of input string in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * @out: The output string in UTF-8 format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * @out_len: Length of the output buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * Converts input string @in, which is in the format of the loaded NLS map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) * into a utf8 string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) * The destination string @out is allocated by this function and the caller is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * responsible for freeing it with kfree()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * On return, *@out_len is the length of @out in bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * On success, the return value is the number of utf8 characters written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * the output buffer @out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * On Failure, a negative number coresponding to the error code is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) befs_nls2utf(struct super_block *sb, const char *in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) int in_len, char **out, int *out_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) struct nls_table *nls = BEFS_SB(sb)->nls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int i, o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) wchar_t uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) int unilen, utflen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) char *result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * There are nls characters that will translate to 3-chars-wide UTF-8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * characters, an additional byte is needed to save the final \0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * in special cases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) int maxlen = (3 * in_len) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) befs_debug(sb, "---> %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (!nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) befs_error(sb, "%s called with no NLS table loaded.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) *out = result = kmalloc(maxlen, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (!*out) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) *out_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) for (i = o = 0; i < in_len; i += unilen, o += utflen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* convert from nls to unicode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) unilen = nls->char2uni(&in[i], in_len - i, &uni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (unilen < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) goto conv_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) /* convert from unicode to UTF-8 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) utflen = utf32_to_utf8(uni, &result[o], 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) if (utflen <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) goto conv_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) result[o] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) *out_len = o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) conv_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) befs_error(sb, "Name using character set %s contains a character that "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) "cannot be converted to unicode.", nls->charset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) kfree(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return -EILSEQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) uint32_t generation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* No need to handle i_generation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) return befs_iget(sb, ino);
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * Map a NFS file handle to a corresponding dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) static struct dentry *befs_fh_to_dentry(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct fid *fid, int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) befs_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * Find the parent for a file specified by NFS handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) static struct dentry *befs_fh_to_parent(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct fid *fid, int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) return generic_fh_to_parent(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) befs_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) static struct dentry *befs_get_parent(struct dentry *child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) struct inode *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct befs_inode_info *befs_ino = BEFS_I(d_inode(child));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) parent = befs_iget(child->d_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) (unsigned long)befs_ino->i_parent.start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (IS_ERR(parent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return ERR_CAST(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return d_obtain_alias(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static const match_table_t befs_tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {Opt_uid, "uid=%d"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) {Opt_gid, "gid=%d"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {Opt_charset, "iocharset=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {Opt_debug, "debug"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) {Opt_err, NULL}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) parse_options(char *options, struct befs_mount_options *opts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) int option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) kuid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) kgid_t gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /* Initialize options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) opts->uid = GLOBAL_ROOT_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) opts->gid = GLOBAL_ROOT_GID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) opts->use_uid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) opts->use_gid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) opts->iocharset = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) opts->debug = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) if (!options)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) while ((p = strsep(&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) int token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) token = match_token(p, befs_tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) case Opt_uid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) uid = INVALID_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (option >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) uid = make_kuid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (!uid_valid(uid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) pr_err("Invalid uid %d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) "using default\n", option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) opts->uid = uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) opts->use_uid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) case Opt_gid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) gid = INVALID_GID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) if (option >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) gid = make_kgid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (!gid_valid(gid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) pr_err("Invalid gid %d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) "using default\n", option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) opts->gid = gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) opts->use_gid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) case Opt_charset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) kfree(opts->iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) opts->iocharset = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) if (!opts->iocharset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) pr_err("allocation failure for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) "iocharset string\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) case Opt_debug:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) opts->debug = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) pr_err("Unrecognized mount option \"%s\" "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) "or missing value\n", p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) static int befs_show_options(struct seq_file *m, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) struct befs_sb_info *befs_sb = BEFS_SB(root->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) struct befs_mount_options *opts = &befs_sb->mount_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) seq_printf(m, ",uid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) from_kuid_munged(&init_user_ns, opts->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) seq_printf(m, ",gid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) from_kgid_munged(&init_user_ns, opts->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (opts->iocharset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) seq_printf(m, ",charset=%s", opts->iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (opts->debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) seq_puts(m, ",debug");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) /* This function has the responsibiltiy of getting the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * filesystem ready for unmounting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) * Basically, we free everything that we allocated in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * befs_read_inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) befs_put_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) kfree(BEFS_SB(sb)->mount_opts.iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) BEFS_SB(sb)->mount_opts.iocharset = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) unload_nls(BEFS_SB(sb)->nls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) kfree(sb->s_fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) /* Allocate private field of the superblock, fill it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * Finish filling the public superblock fields
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * Make the root directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * Load a set of NLS translations if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) befs_fill_super(struct super_block *sb, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) struct befs_sb_info *befs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) befs_super_block *disk_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) struct inode *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) long ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) const unsigned long sb_block = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) const off_t x86_sb_off = 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) int blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (sb->s_fs_info == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) goto unacquire_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) befs_sb = BEFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (!parse_options((char *) data, &befs_sb->mount_opts)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) befs_error(sb, "cannot parse mount options");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) befs_debug(sb, "---> %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) if (!sb_rdonly(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) befs_warning(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) "No write support. Marking filesystem read-only");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) sb->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * Set dummy blocksize to read super block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) * Will be set to real fs blocksize later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) * Linux 2.4.10 and later refuse to read blocks smaller than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) * the logical block size for the device. But we also need to read at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) * least 1k to get the second 512 bytes of the volume.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) blocksize = sb_min_blocksize(sb, 1024);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) if (!blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) befs_error(sb, "unable to set blocksize");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) bh = sb_bread(sb, sb_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) befs_error(sb, "unable to read superblock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) /* account for offset of super block on x86 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) disk_sb = (befs_super_block *) bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) befs_debug(sb, "Using PPC superblock location");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) befs_debug(sb, "Using x86 superblock location");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) disk_sb =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
^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) if ((befs_load_sb(sb, disk_sb) != BEFS_OK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) (befs_check_sb(sb) != BEFS_OK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) goto unacquire_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) befs_dump_super_block(sb, disk_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) if (befs_sb->num_blocks > ~((sector_t)0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) befs_error(sb, "blocks count: %llu is larger than the host can use",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) befs_sb->num_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) * set up enough so that it can read an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) * Fill in kernel superblock fields from private sb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) sb->s_magic = BEFS_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) /* Set real blocksize of fs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) sb_set_blocksize(sb, (ulong) befs_sb->block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) sb->s_op = &befs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) sb->s_export_op = &befs_export_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) sb->s_time_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) sb->s_time_max = 0xffffffffffffll;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (IS_ERR(root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) ret = PTR_ERR(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) sb->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) if (!sb->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) befs_error(sb, "get root inode failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) goto unacquire_priv_sbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* load nls library */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (befs_sb->mount_opts.iocharset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) befs_debug(sb, "Loading nls: %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) befs_sb->mount_opts.iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (!befs_sb->nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) befs_warning(sb, "Cannot load nls %s"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) " loading default nls",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) befs_sb->mount_opts.iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) befs_sb->nls = load_nls_default();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) /* load default nls if none is specified in mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) befs_debug(sb, "Loading default nls");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) befs_sb->nls = load_nls_default();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) unacquire_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) unacquire_priv_sbp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) kfree(befs_sb->mount_opts.iocharset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) kfree(sb->s_fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) unacquire_none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) befs_remount(struct super_block *sb, int *flags, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) if (!(*flags & SB_RDONLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) befs_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) struct super_block *sb = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) befs_debug(sb, "---> %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) buf->f_type = BEFS_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) buf->f_bsize = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) buf->f_blocks = BEFS_SB(sb)->num_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) buf->f_bavail = buf->f_bfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) buf->f_files = 0; /* UNKNOWN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) buf->f_ffree = 0; /* UNKNOWN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) buf->f_namelen = BEFS_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) befs_debug(sb, "<--- %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) static struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) static struct file_system_type befs_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) .name = "befs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) .mount = befs_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) .kill_sb = kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) .fs_flags = FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) MODULE_ALIAS_FS("befs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) init_befs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) pr_info("version: %s\n", BEFS_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) err = befs_init_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) goto unacquire_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) err = register_filesystem(&befs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) goto unacquire_inodecache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) unacquire_inodecache:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) befs_destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) unacquire_none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) static void __exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) exit_befs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) befs_destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) unregister_filesystem(&befs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) * Macros that typecheck the init and exit functions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) * ensures that they are called at init and cleanup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * and eliminates warnings about unused functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) module_init(init_befs_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) module_exit(exit_befs_fs)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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