mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
549 lines
14 KiB
549 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* linux/fs/hfsplus/catalog.c |
|
* |
|
* Copyright (C) 2001 |
|
* Brad Boyer ([email protected]) |
|
* (C) 2003 Ardis Technologies <[email protected]> |
|
* |
|
* Handling of catalog records |
|
*/ |
|
|
|
|
|
#include "hfsplus_fs.h" |
|
#include "hfsplus_raw.h" |
|
|
|
int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, |
|
const hfsplus_btree_key *k2) |
|
{ |
|
__be32 k1p, k2p; |
|
|
|
k1p = k1->cat.parent; |
|
k2p = k2->cat.parent; |
|
if (k1p != k2p) |
|
return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; |
|
|
|
return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name); |
|
} |
|
|
|
int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, |
|
const hfsplus_btree_key *k2) |
|
{ |
|
__be32 k1p, k2p; |
|
|
|
k1p = k1->cat.parent; |
|
k2p = k2->cat.parent; |
|
if (k1p != k2p) |
|
return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; |
|
|
|
return hfsplus_strcmp(&k1->cat.name, &k2->cat.name); |
|
} |
|
|
|
/* Generates key for catalog file/folders record. */ |
|
int hfsplus_cat_build_key(struct super_block *sb, |
|
hfsplus_btree_key *key, u32 parent, const struct qstr *str) |
|
{ |
|
int len, err; |
|
|
|
key->cat.parent = cpu_to_be32(parent); |
|
err = hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN, |
|
str->name, str->len); |
|
if (unlikely(err < 0)) |
|
return err; |
|
|
|
len = be16_to_cpu(key->cat.name.length); |
|
key->key_len = cpu_to_be16(6 + 2 * len); |
|
return 0; |
|
} |
|
|
|
/* Generates key for catalog thread record. */ |
|
void hfsplus_cat_build_key_with_cnid(struct super_block *sb, |
|
hfsplus_btree_key *key, u32 parent) |
|
{ |
|
key->cat.parent = cpu_to_be32(parent); |
|
key->cat.name.length = 0; |
|
key->key_len = cpu_to_be16(6); |
|
} |
|
|
|
static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, |
|
struct hfsplus_unistr *name) |
|
{ |
|
int ustrlen; |
|
|
|
ustrlen = be16_to_cpu(name->length); |
|
key->cat.parent = cpu_to_be32(parent); |
|
key->cat.name.length = cpu_to_be16(ustrlen); |
|
ustrlen *= 2; |
|
memcpy(key->cat.name.unicode, name->unicode, ustrlen); |
|
key->key_len = cpu_to_be16(6 + ustrlen); |
|
} |
|
|
|
void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms) |
|
{ |
|
if (inode->i_flags & S_IMMUTABLE) |
|
perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; |
|
else |
|
perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; |
|
if (inode->i_flags & S_APPEND) |
|
perms->rootflags |= HFSPLUS_FLG_APPEND; |
|
else |
|
perms->rootflags &= ~HFSPLUS_FLG_APPEND; |
|
|
|
perms->userflags = HFSPLUS_I(inode)->userflags; |
|
perms->mode = cpu_to_be16(inode->i_mode); |
|
perms->owner = cpu_to_be32(i_uid_read(inode)); |
|
perms->group = cpu_to_be32(i_gid_read(inode)); |
|
|
|
if (S_ISREG(inode->i_mode)) |
|
perms->dev = cpu_to_be32(inode->i_nlink); |
|
else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) |
|
perms->dev = cpu_to_be32(inode->i_rdev); |
|
else |
|
perms->dev = 0; |
|
} |
|
|
|
static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, |
|
u32 cnid, struct inode *inode) |
|
{ |
|
struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
|
|
|
if (S_ISDIR(inode->i_mode)) { |
|
struct hfsplus_cat_folder *folder; |
|
|
|
folder = &entry->folder; |
|
memset(folder, 0, sizeof(*folder)); |
|
folder->type = cpu_to_be16(HFSPLUS_FOLDER); |
|
if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) |
|
folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT); |
|
folder->id = cpu_to_be32(inode->i_ino); |
|
HFSPLUS_I(inode)->create_date = |
|
folder->create_date = |
|
folder->content_mod_date = |
|
folder->attribute_mod_date = |
|
folder->access_date = hfsp_now2mt(); |
|
hfsplus_cat_set_perms(inode, &folder->permissions); |
|
if (inode == sbi->hidden_dir) |
|
/* invisible and namelocked */ |
|
folder->user_info.frFlags = cpu_to_be16(0x5000); |
|
return sizeof(*folder); |
|
} else { |
|
struct hfsplus_cat_file *file; |
|
|
|
file = &entry->file; |
|
memset(file, 0, sizeof(*file)); |
|
file->type = cpu_to_be16(HFSPLUS_FILE); |
|
file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); |
|
file->id = cpu_to_be32(cnid); |
|
HFSPLUS_I(inode)->create_date = |
|
file->create_date = |
|
file->content_mod_date = |
|
file->attribute_mod_date = |
|
file->access_date = hfsp_now2mt(); |
|
if (cnid == inode->i_ino) { |
|
hfsplus_cat_set_perms(inode, &file->permissions); |
|
if (S_ISLNK(inode->i_mode)) { |
|
file->user_info.fdType = |
|
cpu_to_be32(HFSP_SYMLINK_TYPE); |
|
file->user_info.fdCreator = |
|
cpu_to_be32(HFSP_SYMLINK_CREATOR); |
|
} else { |
|
file->user_info.fdType = |
|
cpu_to_be32(sbi->type); |
|
file->user_info.fdCreator = |
|
cpu_to_be32(sbi->creator); |
|
} |
|
if (HFSPLUS_FLG_IMMUTABLE & |
|
(file->permissions.rootflags | |
|
file->permissions.userflags)) |
|
file->flags |= |
|
cpu_to_be16(HFSPLUS_FILE_LOCKED); |
|
} else { |
|
file->user_info.fdType = |
|
cpu_to_be32(HFSP_HARDLINK_TYPE); |
|
file->user_info.fdCreator = |
|
cpu_to_be32(HFSP_HFSPLUS_CREATOR); |
|
file->user_info.fdFlags = |
|
cpu_to_be16(0x100); |
|
file->create_date = |
|
HFSPLUS_I(sbi->hidden_dir)->create_date; |
|
file->permissions.dev = |
|
cpu_to_be32(HFSPLUS_I(inode)->linkid); |
|
} |
|
return sizeof(*file); |
|
} |
|
} |
|
|
|
static int hfsplus_fill_cat_thread(struct super_block *sb, |
|
hfsplus_cat_entry *entry, int type, |
|
u32 parentid, const struct qstr *str) |
|
{ |
|
int err; |
|
|
|
entry->type = cpu_to_be16(type); |
|
entry->thread.reserved = 0; |
|
entry->thread.parentID = cpu_to_be32(parentid); |
|
err = hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN, |
|
str->name, str->len); |
|
if (unlikely(err < 0)) |
|
return err; |
|
|
|
return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; |
|
} |
|
|
|
/* Try to get a catalog entry for given catalog id */ |
|
int hfsplus_find_cat(struct super_block *sb, u32 cnid, |
|
struct hfs_find_data *fd) |
|
{ |
|
hfsplus_cat_entry tmp; |
|
int err; |
|
u16 type; |
|
|
|
hfsplus_cat_build_key_with_cnid(sb, fd->search_key, cnid); |
|
err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); |
|
if (err) |
|
return err; |
|
|
|
type = be16_to_cpu(tmp.type); |
|
if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { |
|
pr_err("found bad thread record in catalog\n"); |
|
return -EIO; |
|
} |
|
|
|
if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { |
|
pr_err("catalog name length corrupted\n"); |
|
return -EIO; |
|
} |
|
|
|
hfsplus_cat_build_key_uni(fd->search_key, |
|
be32_to_cpu(tmp.thread.parentID), |
|
&tmp.thread.nodeName); |
|
return hfs_brec_find(fd, hfs_find_rec_by_key); |
|
} |
|
|
|
static void hfsplus_subfolders_inc(struct inode *dir) |
|
{ |
|
struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb); |
|
|
|
if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { |
|
/* |
|
* Increment subfolder count. Note, the value is only meaningful |
|
* for folders with HFSPLUS_HAS_FOLDER_COUNT flag set. |
|
*/ |
|
HFSPLUS_I(dir)->subfolders++; |
|
} |
|
} |
|
|
|
static void hfsplus_subfolders_dec(struct inode *dir) |
|
{ |
|
struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb); |
|
|
|
if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { |
|
/* |
|
* Decrement subfolder count. Note, the value is only meaningful |
|
* for folders with HFSPLUS_HAS_FOLDER_COUNT flag set. |
|
* |
|
* Check for zero. Some subfolders may have been created |
|
* by an implementation ignorant of this counter. |
|
*/ |
|
if (HFSPLUS_I(dir)->subfolders) |
|
HFSPLUS_I(dir)->subfolders--; |
|
} |
|
} |
|
|
|
int hfsplus_create_cat(u32 cnid, struct inode *dir, |
|
const struct qstr *str, struct inode *inode) |
|
{ |
|
struct super_block *sb = dir->i_sb; |
|
struct hfs_find_data fd; |
|
hfsplus_cat_entry entry; |
|
int entry_size; |
|
int err; |
|
|
|
hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n", |
|
str->name, cnid, inode->i_nlink); |
|
err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); |
|
if (err) |
|
return err; |
|
|
|
/* |
|
* Fail early and avoid ENOSPC during the btree operations. We may |
|
* have to split the root node at most once. |
|
*/ |
|
err = hfs_bmap_reserve(fd.tree, 2 * fd.tree->depth); |
|
if (err) |
|
goto err2; |
|
|
|
hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); |
|
entry_size = hfsplus_fill_cat_thread(sb, &entry, |
|
S_ISDIR(inode->i_mode) ? |
|
HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, |
|
dir->i_ino, str); |
|
if (unlikely(entry_size < 0)) { |
|
err = entry_size; |
|
goto err2; |
|
} |
|
|
|
err = hfs_brec_find(&fd, hfs_find_rec_by_key); |
|
if (err != -ENOENT) { |
|
if (!err) |
|
err = -EEXIST; |
|
goto err2; |
|
} |
|
err = hfs_brec_insert(&fd, &entry, entry_size); |
|
if (err) |
|
goto err2; |
|
|
|
err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); |
|
if (unlikely(err)) |
|
goto err1; |
|
|
|
entry_size = hfsplus_cat_build_record(&entry, cnid, inode); |
|
err = hfs_brec_find(&fd, hfs_find_rec_by_key); |
|
if (err != -ENOENT) { |
|
/* panic? */ |
|
if (!err) |
|
err = -EEXIST; |
|
goto err1; |
|
} |
|
err = hfs_brec_insert(&fd, &entry, entry_size); |
|
if (err) |
|
goto err1; |
|
|
|
dir->i_size++; |
|
if (S_ISDIR(inode->i_mode)) |
|
hfsplus_subfolders_inc(dir); |
|
dir->i_mtime = dir->i_ctime = current_time(dir); |
|
hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); |
|
|
|
hfs_find_exit(&fd); |
|
return 0; |
|
|
|
err1: |
|
hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); |
|
if (!hfs_brec_find(&fd, hfs_find_rec_by_key)) |
|
hfs_brec_remove(&fd); |
|
err2: |
|
hfs_find_exit(&fd); |
|
return err; |
|
} |
|
|
|
int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str) |
|
{ |
|
struct super_block *sb = dir->i_sb; |
|
struct hfs_find_data fd; |
|
struct hfsplus_fork_raw fork; |
|
struct list_head *pos; |
|
int err, off; |
|
u16 type; |
|
|
|
hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); |
|
err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); |
|
if (err) |
|
return err; |
|
|
|
/* |
|
* Fail early and avoid ENOSPC during the btree operations. We may |
|
* have to split the root node at most once. |
|
*/ |
|
err = hfs_bmap_reserve(fd.tree, 2 * (int)fd.tree->depth - 2); |
|
if (err) |
|
goto out; |
|
|
|
if (!str) { |
|
int len; |
|
|
|
hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); |
|
err = hfs_brec_find(&fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
|
|
off = fd.entryoffset + |
|
offsetof(struct hfsplus_cat_thread, nodeName); |
|
fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); |
|
hfs_bnode_read(fd.bnode, |
|
&fd.search_key->cat.name.length, off, 2); |
|
len = be16_to_cpu(fd.search_key->cat.name.length) * 2; |
|
hfs_bnode_read(fd.bnode, |
|
&fd.search_key->cat.name.unicode, |
|
off + 2, len); |
|
fd.search_key->key_len = cpu_to_be16(6 + len); |
|
} else { |
|
err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); |
|
if (unlikely(err)) |
|
goto out; |
|
} |
|
|
|
err = hfs_brec_find(&fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
|
|
type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); |
|
if (type == HFSPLUS_FILE) { |
|
#if 0 |
|
off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); |
|
hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); |
|
hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); |
|
#endif |
|
|
|
off = fd.entryoffset + |
|
offsetof(struct hfsplus_cat_file, rsrc_fork); |
|
hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); |
|
hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); |
|
} |
|
|
|
/* we only need to take spinlock for exclusion with ->release() */ |
|
spin_lock(&HFSPLUS_I(dir)->open_dir_lock); |
|
list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) { |
|
struct hfsplus_readdir_data *rd = |
|
list_entry(pos, struct hfsplus_readdir_data, list); |
|
if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) |
|
rd->file->f_pos--; |
|
} |
|
spin_unlock(&HFSPLUS_I(dir)->open_dir_lock); |
|
|
|
err = hfs_brec_remove(&fd); |
|
if (err) |
|
goto out; |
|
|
|
hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); |
|
err = hfs_brec_find(&fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
|
|
err = hfs_brec_remove(&fd); |
|
if (err) |
|
goto out; |
|
|
|
dir->i_size--; |
|
if (type == HFSPLUS_FOLDER) |
|
hfsplus_subfolders_dec(dir); |
|
dir->i_mtime = dir->i_ctime = current_time(dir); |
|
hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); |
|
|
|
if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) { |
|
if (HFSPLUS_SB(sb)->attr_tree) |
|
hfsplus_delete_all_attrs(dir, cnid); |
|
} |
|
|
|
out: |
|
hfs_find_exit(&fd); |
|
|
|
return err; |
|
} |
|
|
|
int hfsplus_rename_cat(u32 cnid, |
|
struct inode *src_dir, const struct qstr *src_name, |
|
struct inode *dst_dir, const struct qstr *dst_name) |
|
{ |
|
struct super_block *sb = src_dir->i_sb; |
|
struct hfs_find_data src_fd, dst_fd; |
|
hfsplus_cat_entry entry; |
|
int entry_size, type; |
|
int err; |
|
|
|
hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", |
|
cnid, src_dir->i_ino, src_name->name, |
|
dst_dir->i_ino, dst_name->name); |
|
err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); |
|
if (err) |
|
return err; |
|
dst_fd = src_fd; |
|
|
|
/* |
|
* Fail early and avoid ENOSPC during the btree operations. We may |
|
* have to split the root node at most twice. |
|
*/ |
|
err = hfs_bmap_reserve(src_fd.tree, 4 * (int)src_fd.tree->depth - 1); |
|
if (err) |
|
goto out; |
|
|
|
/* find the old dir entry and read the data */ |
|
err = hfsplus_cat_build_key(sb, src_fd.search_key, |
|
src_dir->i_ino, src_name); |
|
if (unlikely(err)) |
|
goto out; |
|
|
|
err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) { |
|
err = -EIO; |
|
goto out; |
|
} |
|
|
|
hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, |
|
src_fd.entrylength); |
|
type = be16_to_cpu(entry.type); |
|
|
|
/* create new dir entry with the data from the old entry */ |
|
err = hfsplus_cat_build_key(sb, dst_fd.search_key, |
|
dst_dir->i_ino, dst_name); |
|
if (unlikely(err)) |
|
goto out; |
|
|
|
err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key); |
|
if (err != -ENOENT) { |
|
if (!err) |
|
err = -EEXIST; |
|
goto out; |
|
} |
|
|
|
err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); |
|
if (err) |
|
goto out; |
|
dst_dir->i_size++; |
|
if (type == HFSPLUS_FOLDER) |
|
hfsplus_subfolders_inc(dst_dir); |
|
dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir); |
|
|
|
/* finally remove the old entry */ |
|
err = hfsplus_cat_build_key(sb, src_fd.search_key, |
|
src_dir->i_ino, src_name); |
|
if (unlikely(err)) |
|
goto out; |
|
|
|
err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
err = hfs_brec_remove(&src_fd); |
|
if (err) |
|
goto out; |
|
src_dir->i_size--; |
|
if (type == HFSPLUS_FOLDER) |
|
hfsplus_subfolders_dec(src_dir); |
|
src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir); |
|
|
|
/* remove old thread entry */ |
|
hfsplus_cat_build_key_with_cnid(sb, src_fd.search_key, cnid); |
|
err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); |
|
if (err) |
|
goto out; |
|
type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); |
|
err = hfs_brec_remove(&src_fd); |
|
if (err) |
|
goto out; |
|
|
|
/* create new thread entry */ |
|
hfsplus_cat_build_key_with_cnid(sb, dst_fd.search_key, cnid); |
|
entry_size = hfsplus_fill_cat_thread(sb, &entry, type, |
|
dst_dir->i_ino, dst_name); |
|
if (unlikely(entry_size < 0)) { |
|
err = entry_size; |
|
goto out; |
|
} |
|
|
|
err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key); |
|
if (err != -ENOENT) { |
|
if (!err) |
|
err = -EEXIST; |
|
goto out; |
|
} |
|
err = hfs_brec_insert(&dst_fd, &entry, entry_size); |
|
|
|
hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY); |
|
hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY); |
|
out: |
|
hfs_bnode_put(dst_fd.bnode); |
|
hfs_find_exit(&src_fd); |
|
return err; |
|
}
|
|
|