xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Browse Source 
Pull ext4 updates from Ted Ts'o:
 "Add as a feature case-insensitive directories (the casefold feature)
  using Unicode 12.1.

  Also, the usual largish number of cleanups and bug fixes"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (25 commits)
  ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
  ext4: fix ext4_show_options for file systems w/o journal
  unicode: refactor the rule for regenerating utf8data.h
  docs: ext4.rst: document case-insensitive directories
  ext4: Support case-insensitive file name lookups
  ext4: include charset encoding information in the superblock
  MAINTAINERS: add Unicode subsystem entry
  unicode: update unicode database unicode version 12.1.0
  unicode: introduce test module for normalized utf8 implementation
  unicode: implement higher level API for string handling
  unicode: reduce the size of utf8data[]
  unicode: introduce code for UTF-8 normalization
  unicode: introduce UTF-8 character database
  ext4: actually request zeroing of inode table after grow
  ext4: cond_resched in work-heavy group loops
  ext4: fix use-after-free race with debug_want_extra_isize
  ext4: avoid drop reference to iloc.bh twice
  ext4: ignore e_value_offs for xattrs with value-in-ea-inode
  ext4: protect journal inode's blocks using block_validity
  ext4: use BUG() instead of BUG_ON(1)
  ...
This commit is contained in:
Linus Torvalds
2019-05-07 21:12:44 -07:00
parent e5fef2a973 db90f41916
commit 5abe37954e
35 changed files with 9591 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
fs/ext4/block_validity.c
View File

@@ -137,6 +137,48 @@ static void debug_print_tree(struct ext4_sb_info *sbi)
printk(KERN_CONT "\n");
}
static int ext4_protect_reserved_inode(struct super_block *sb, u32 ino)
{
struct inode *inode;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_map_blocks map;
u32 i = 0, err = 0, num, n;
if ((ino < EXT4_ROOT_INO) ||
(ino > le32_to_cpu(sbi->s_es->s_inodes_count)))
return -EINVAL;
inode = ext4_iget(sb, ino, EXT4_IGET_SPECIAL);
if (IS_ERR(inode))
return PTR_ERR(inode);
num = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
while (i < num) {
map.m_lblk = i;
map.m_len = num - i;
n = ext4_map_blocks(NULL, inode, &map, 0);
if (n < 0) {
err = n;
break;
}
if (n == 0) {
i++;
} else {
if (!ext4_data_block_valid(sbi, map.m_pblk, n)) {
ext4_error(sb, "blocks %llu-%llu from inode %u "
"overlap system zone", map.m_pblk,
map.m_pblk + map.m_len - 1, ino);
err = -EFSCORRUPTED;
break;
}
err = add_system_zone(sbi, map.m_pblk, n);
if (err < 0)
break;
i += n;
}
}
iput(inode);
return err;
}
int ext4_setup_system_zone(struct super_block *sb)
{
ext4_group_t ngroups = ext4_get_groups_count(sb);
@@ -155,6 +197,7 @@ int ext4_setup_system_zone(struct super_block *sb)
return 0;
for (i=0; i < ngroups; i++) {
cond_resched();
if (ext4_bg_has_super(sb, i) &&
((i < 5) || ((i % flex_size) == 0)))
add_system_zone(sbi, ext4_group_first_block_no(sb, i),
@@ -171,6 +214,12 @@ int ext4_setup_system_zone(struct super_block *sb)
if (ret)
return ret;
}
if (ext4_has_feature_journal(sb) && sbi->s_es->s_journal_inum) {
ret = ext4_protect_reserved_inode(sb,
le32_to_cpu(sbi->s_es->s_journal_inum));
if (ret)
return ret;
}
if (test_opt(sb, DEBUG))
debug_print_tree(sbi);

48
fs/ext4/dir.c
View File

@@ -26,6 +26,7 @@
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/iversion.h>
#include <linux/unicode.h>
#include "ext4.h"
#include "xattr.h"
@@ -660,3 +661,50 @@ const struct file_operations ext4_dir_operations = {
.open = ext4_dir_open,
.release = ext4_release_dir,
};
#ifdef CONFIG_UNICODE
static int ext4_d_compare(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name)
{
struct qstr qstr = {.name = str, .len = len };
if (!IS_CASEFOLDED(dentry->d_parent->d_inode)) {
if (len != name->len)
return -1;
return !memcmp(str, name, len);
}
return ext4_ci_compare(dentry->d_parent->d_inode, name, &qstr);
}
static int ext4_d_hash(const struct dentry *dentry, struct qstr *str)
{
const struct ext4_sb_info *sbi = EXT4_SB(dentry->d_sb);
const struct unicode_map *um = sbi->s_encoding;
unsigned char *norm;
int len, ret = 0;
if (!IS_CASEFOLDED(dentry->d_inode))
return 0;
norm = kmalloc(PATH_MAX, GFP_ATOMIC);
if (!norm)
return -ENOMEM;
len = utf8_casefold(um, str, norm, PATH_MAX);
if (len < 0) {
if (ext4_has_strict_mode(sbi))
ret = -EINVAL;
goto out;
}
str->hash = full_name_hash(dentry, norm, len);
out:
kfree(norm);
return ret;
}
const struct dentry_operations ext4_dentry_ops = {
.d_hash = ext4_d_hash,
.d_compare = ext4_d_compare,
};
#endif

45
fs/ext4/ext4.h
View File

@@ -399,10 +399,11 @@ struct flex_groups {
#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */
#define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */
#define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
#define EXT4_CASEFOLD_FL 0x40000000 /* Casefolded file */
#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
#define EXT4_FL_USER_VISIBLE 0x304BDFFF /* User visible flags */
#define EXT4_FL_USER_MODIFIABLE 0x204BC0FF /* User modifiable flags */
#define EXT4_FL_USER_VISIBLE 0x704BDFFF /* User visible flags */
#define EXT4_FL_USER_MODIFIABLE 0x604BC0FF /* User modifiable flags */
/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
#define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \
@@ -417,10 +418,10 @@ struct flex_groups {
EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\
EXT4_PROJINHERIT_FL)
EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL)
/* Flags that are appropriate for regular files (all but dir-specific ones). */
#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL))
/* Flags that are appropriate for non-directories/regular files. */
#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
@@ -1313,7 +1314,9 @@ struct ext4_super_block {
__u8 s_first_error_time_hi;
__u8 s_last_error_time_hi;
__u8 s_pad[2];
__le32 s_reserved[96]; /* Padding to the end of the block */
__le16 s_encoding; /* Filename charset encoding */
__le16 s_encoding_flags; /* Filename charset encoding flags */
__le32 s_reserved[95]; /* Padding to the end of the block */
__le32 s_checksum; /* crc32c(superblock) */
};
@@ -1338,6 +1341,16 @@ struct ext4_super_block {
/* Number of quota types we support */
#define EXT4_MAXQUOTAS 3
#define EXT4_ENC_UTF8_12_1 1
/*
* Flags for ext4_sb_info.s_encoding_flags.
*/
#define EXT4_ENC_STRICT_MODE_FL (1 << 0)
#define ext4_has_strict_mode(sbi) \
(sbi->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL)
/*
* fourth extended-fs super-block data in memory
*/
@@ -1387,6 +1400,10 @@ struct ext4_sb_info {
struct kobject s_kobj;
struct completion s_kobj_unregister;
struct super_block *s_sb;
#ifdef CONFIG_UNICODE
struct unicode_map *s_encoding;
__u16 s_encoding_flags;
#endif
/* Journaling */
struct journal_s *s_journal;
@@ -1592,9 +1609,6 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_SB(sb) (sb)
#endif
/*
* Returns true if the inode is inode is encrypted
*/
#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
/*
@@ -1663,6 +1677,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
#define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000
extern void ext4_update_dynamic_rev(struct super_block *sb);
@@ -1756,6 +1771,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED)
EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR)
EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA)
EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD)
#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
@@ -1783,6 +1799,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
EXT4_FEATURE_INCOMPAT_MMP | \
EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
EXT4_FEATURE_INCOMPAT_ENCRYPT | \
EXT4_FEATURE_INCOMPAT_CASEFOLD | \
EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
EXT4_FEATURE_INCOMPAT_LARGEDIR)
#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
@@ -2376,8 +2393,8 @@ extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
/* hash.c */
extern int ext4fs_dirhash(const char *name, int len, struct
dx_hash_info *hinfo);
extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
struct dx_hash_info *hinfo);
/* ialloc.c */
extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
@@ -2973,6 +2990,10 @@ static inline void ext4_unlock_group(struct super_block *sb,
/* dir.c */
extern const struct file_operations ext4_dir_operations;
#ifdef CONFIG_UNICODE
extern const struct dentry_operations ext4_dentry_ops;
#endif
/* file.c */
extern const struct inode_operations ext4_file_inode_operations;
extern const struct file_operations ext4_file_operations;
@@ -3065,6 +3086,10 @@ extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
extern int ext4_handle_dirty_dirent_node(handle_t *handle,
struct inode *inode,
struct buffer_head *bh);
extern int ext4_ci_compare(const struct inode *parent,
const struct qstr *name,
const struct qstr *entry);
#define S_SHIFT 12
static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
[S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,

4
fs/ext4/extents_status.c
View File

@@ -711,7 +711,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
* We don't need to check unwritten extent because
* indirect-based file doesn't have it.
*/
BUG_ON(1);
BUG();
}
} else if (retval == 0) {
if (ext4_es_is_written(es)) {
@@ -780,7 +780,7 @@ static int __es_insert_extent(struct inode *inode, struct extent_status *newes)
}
p = &(*p)->rb_right;
} else {
BUG_ON(1);
BUG();
return -EINVAL;
}
}

34
fs/ext4/hash.c
View File

@@ -6,6 +6,7 @@
*/
#include <linux/fs.h>
#include <linux/unicode.h>
#include <linux/compiler.h>
#include <linux/bitops.h>
#include "ext4.h"
@@ -196,7 +197,8 @@ static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
* represented, and whether or not the returned hash is 32 bits or 64
* bits. 32 bit hashes will return 0 for the minor hash.
*/
int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
static int __ext4fs_dirhash(const char *name, int len,
struct dx_hash_info *hinfo)
{
__u32 hash;
__u32 minor_hash = 0;
@@ -268,3 +270,33 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
hinfo->minor_hash = minor_hash;
return 0;
}
int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
struct dx_hash_info *hinfo)
{
#ifdef CONFIG_UNICODE
const struct unicode_map *um = EXT4_SB(dir->i_sb)->s_encoding;
int r, dlen;
unsigned char *buff;
struct qstr qstr = {.name = name, .len = len };
if (len && IS_CASEFOLDED(dir)) {
buff = kzalloc(sizeof(char) * PATH_MAX, GFP_KERNEL);
if (!buff)
return -ENOMEM;
dlen = utf8_casefold(um, &qstr, buff, PATH_MAX);
if (dlen < 0) {
kfree(buff);
goto opaque_seq;
}
r = __ext4fs_dirhash(buff, dlen, hinfo);
kfree(buff);
return r;
}
opaque_seq:
#endif
return __ext4fs_dirhash(name, len, hinfo);
}

2
fs/ext4/ialloc.c
View File

@@ -455,7 +455,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
if (qstr) {
hinfo.hash_version = DX_HASH_HALF_MD4;
hinfo.seed = sbi->s_hash_seed;
ext4fs_dirhash(qstr->name, qstr->len, &hinfo);
ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo);
grp = hinfo.hash;
} else
grp = prandom_u32();

2
fs/ext4/inline.c
View File

@@ -1407,7 +1407,7 @@ int htree_inlinedir_to_tree(struct file *dir_file,
}
}
ext4fs_dirhash(de->name, de->name_len, hinfo);
ext4fs_dirhash(dir, de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
((hinfo->hash == start_hash) &&
(hinfo->minor_hash < start_minor_hash)))

12
fs/ext4/inode.c
View File

@@ -399,6 +399,10 @@ static int __check_block_validity(struct inode *inode, const char *func,
unsigned int line,
struct ext4_map_blocks *map)
{
if (ext4_has_feature_journal(inode->i_sb) &&
(inode->i_ino ==
le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
return 0;
if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
map->m_len)) {
ext4_error_inode(inode, func, line, map->m_pblk,
@@ -541,7 +545,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
map->m_len = retval;
retval = 0;
} else {
BUG_ON(1);
BUG();
}
#ifdef ES_AGGRESSIVE_TEST
ext4_map_blocks_es_recheck(handle, inode, map,
@@ -1876,7 +1880,7 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
else if (ext4_es_is_unwritten(&es))
map->m_flags |= EXT4_MAP_UNWRITTEN;
else
BUG_ON(1);
BUG();
#ifdef ES_AGGRESSIVE_TEST
ext4_map_blocks_es_recheck(NULL, inode, map, &orig_map, 0);
@@ -4738,9 +4742,11 @@ void ext4_set_inode_flags(struct inode *inode)
new_fl |= S_DAX;
if (flags & EXT4_ENCRYPT_FL)
new_fl |= S_ENCRYPTED;
if (flags & EXT4_CASEFOLD_FL)
new_fl |= S_CASEFOLD;
inode_set_flags(inode, new_fl,
S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX|
S_ENCRYPTED);
S_ENCRYPTED|S_CASEFOLD);
}
static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,

20
fs/ext4/ioctl.c
View File

@@ -278,6 +278,7 @@ static int ext4_ioctl_setflags(struct inode *inode,
struct ext4_iloc iloc;
unsigned int oldflags, mask, i;
unsigned int jflag;
struct super_block *sb = inode->i_sb;
/* Is it quota file? Do not allow user to mess with it */
if (ext4_is_quota_file(inode))
@@ -322,6 +323,23 @@ static int ext4_ioctl_setflags(struct inode *inode,
goto flags_out;
}
if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
if (!ext4_has_feature_casefold(sb)) {
err = -EOPNOTSUPP;
goto flags_out;
}
if (!S_ISDIR(inode->i_mode)) {
err = -ENOTDIR;
goto flags_out;
}
if (!ext4_empty_dir(inode)) {
err = -ENOTEMPTY;
goto flags_out;
}
}
handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
@@ -978,7 +996,7 @@ mext_out:
if (err == 0)
err = err2;
mnt_drop_write_file(filp);
if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
ext4_has_group_desc_csum(sb) &&
test_opt(sb, INIT_INODE_TABLE))
err = ext4_register_li_request(sb, o_group);

4
fs/ext4/mballoc.c
View File

@@ -1539,7 +1539,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block,
ex->fe_len += 1 << order;
}
if (ex->fe_start + ex->fe_len > (1 << (e4b->bd_blkbits + 3))) {
if (ex->fe_start + ex->fe_len > EXT4_CLUSTERS_PER_GROUP(e4b->bd_sb)) {
/* Should never happen! (but apparently sometimes does?!?) */
WARN_ON(1);
ext4_error(e4b->bd_sb, "corruption or bug in mb_find_extent "
@@ -2490,6 +2490,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;
EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
for (i = 0; i < ngroups; i++) {
cond_resched();
desc = ext4_get_group_desc(sb, i, NULL);
if (desc == NULL) {
ext4_msg(sb, KERN_ERR, "can't read descriptor %u", i);
@@ -2705,6 +2706,7 @@ int ext4_mb_release(struct super_block *sb)
if (sbi->s_group_info) {
for (i = 0; i < ngroups; i++) {
cond_resched();
grinfo = ext4_get_group_info(sb, i);
#ifdef DOUBLE_CHECK
kfree(grinfo->bb_bitmap);

107
fs/ext4/namei.c
View File

@@ -35,6 +35,7 @@
#include <linux/buffer_head.h>
#include <linux/bio.h>
#include <linux/iversion.h>
#include <linux/unicode.h>
#include "ext4.h"
#include "ext4_jbd2.h"
@@ -629,7 +630,7 @@ static struct stats dx_show_leaf(struct inode *dir,
}
if (!fscrypt_has_encryption_key(dir)) {
/* Directory is not encrypted */
ext4fs_dirhash(de->name,
ext4fs_dirhash(dir, de->name,
de->name_len, &h);
printk("%*.s:(U)%x.%u ", len,
name, h.hash,
@@ -662,8 +663,8 @@ static struct stats dx_show_leaf(struct inode *dir,
name = fname_crypto_str.name;
len = fname_crypto_str.len;
}
ext4fs_dirhash(de->name, de->name_len,
&h);
ext4fs_dirhash(dir, de->name,
de->name_len, &h);
printk("%*.s:(E)%x.%u ", len, name,
h.hash, (unsigned) ((char *) de
- base));
@@ -673,7 +674,7 @@ static struct stats dx_show_leaf(struct inode *dir,
#else
int len = de->name_len;
char *name = de->name;
ext4fs_dirhash(de->name, de->name_len, &h);
ext4fs_dirhash(dir, de->name, de->name_len, &h);
printk("%*.s:%x.%u ", len, name, h.hash,
(unsigned) ((char *) de - base));
#endif
@@ -762,7 +763,7 @@ dx_probe(struct ext4_filename *fname, struct inode *dir,
hinfo->hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
if (fname && fname_name(fname))
ext4fs_dirhash(fname_name(fname), fname_len(fname), hinfo);
ext4fs_dirhash(dir, fname_name(fname), fname_len(fname), hinfo);
hash = hinfo->hash;
if (root->info.unused_flags & 1) {
@@ -1008,7 +1009,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
/* silently ignore the rest of the block */
break;
}
ext4fs_dirhash(de->name, de->name_len, hinfo);
ext4fs_dirhash(dir, de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
((hinfo->hash == start_hash) &&
(hinfo->minor_hash < start_minor_hash)))
@@ -1197,7 +1198,7 @@ static int dx_make_map(struct inode *dir, struct ext4_dir_entry_2 *de,
while ((char *) de < base + blocksize) {
if (de->name_len && de->inode) {
ext4fs_dirhash(de->name, de->name_len, &h);
ext4fs_dirhash(dir, de->name, de->name_len, &h);
map_tail--;
map_tail->hash = h.hash;
map_tail->offs = ((char *) de - base)>>2;
@@ -1252,15 +1253,52 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
dx_set_count(entries, count + 1);
}
#ifdef CONFIG_UNICODE
/*
* Test whether a case-insensitive directory entry matches the filename
* being searched for.
*
* Returns: 0 if the directory entry matches, more than 0 if it
* doesn't match or less than zero on error.
*/
int ext4_ci_compare(const struct inode *parent, const struct qstr *name,
const struct qstr *entry)
{
const struct ext4_sb_info *sbi = EXT4_SB(parent->i_sb);
const struct unicode_map *um = sbi->s_encoding;
int ret;
ret = utf8_strncasecmp(um, name, entry);
if (ret < 0) {
/* Handle invalid character sequence as either an error
* or as an opaque byte sequence.
*/
if (ext4_has_strict_mode(sbi))
return -EINVAL;
if (name->len != entry->len)
return 1;
return !!memcmp(name->name, entry->name, name->len);
}
return ret;
}
#endif
/*
* Test whether a directory entry matches the filename being searched for.
*
* Return: %true if the directory entry matches, otherwise %false.
*/
static inline bool ext4_match(const struct ext4_filename *fname,
static inline bool ext4_match(const struct inode *parent,
const struct ext4_filename *fname,
const struct ext4_dir_entry_2 *de)
{
struct fscrypt_name f;
#ifdef CONFIG_UNICODE
const struct qstr entry = {.name = de->name, .len = de->name_len};
#endif
if (!de->inode)
return false;
@@ -1270,6 +1308,12 @@ static inline bool ext4_match(const struct ext4_filename *fname,
#ifdef CONFIG_FS_ENCRYPTION
f.crypto_buf = fname->crypto_buf;
#endif
#ifdef CONFIG_UNICODE
if (EXT4_SB(parent->i_sb)->s_encoding && IS_CASEFOLDED(parent))
return (ext4_ci_compare(parent, fname->usr_fname, &entry) == 0);
#endif
return fscrypt_match_name(&f, de->name, de->name_len);
}
@@ -1290,7 +1334,7 @@ int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
/* this code is executed quadratically often */
/* do minimal checking `by hand' */
if ((char *) de + de->name_len <= dlimit &&
ext4_match(fname, de)) {
ext4_match(dir, fname, de)) {
/* found a match - just to be sure, do
* a full check */
if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
@@ -1588,6 +1632,17 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
return ERR_PTR(-EPERM);
}
}
#ifdef CONFIG_UNICODE
if (!inode && IS_CASEFOLDED(dir)) {
/* Eventually we want to call d_add_ci(dentry, NULL)
* for negative dentries in the encoding case as
* well. For now, prevent the negative dentry
* from being cached.
*/
return NULL;
}
#endif
return d_splice_alias(inode, dentry);
}
@@ -1798,7 +1853,7 @@ int ext4_find_dest_de(struct inode *dir, struct inode *inode,
if (ext4_check_dir_entry(dir, NULL, de, bh,
buf, buf_size, offset))
return -EFSCORRUPTED;
if (ext4_match(fname, de))
if (ext4_match(dir, fname, de))
return -EEXIST;
nlen = EXT4_DIR_REC_LEN(de->name_len);
rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
@@ -1983,7 +2038,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
if (fname->hinfo.hash_version <= DX_HASH_TEA)
fname->hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
fname->hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
ext4fs_dirhash(fname_name(fname), fname_len(fname), &fname->hinfo);
ext4fs_dirhash(dir, fname_name(fname), fname_len(fname), &fname->hinfo);
memset(frames, 0, sizeof(frames));
frame = frames;
@@ -2036,6 +2091,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
struct ext4_dir_entry_2 *de;
struct ext4_dir_entry_tail *t;
struct super_block *sb;
struct ext4_sb_info *sbi;
struct ext4_filename fname;
int retval;
int dx_fallback=0;
@@ -2047,10 +2103,17 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
csum_size = sizeof(struct ext4_dir_entry_tail);
sb = dir->i_sb;
sbi = EXT4_SB(sb);
blocksize = sb->s_blocksize;
if (!dentry->d_name.len)
return -EINVAL;
#ifdef CONFIG_UNICODE
if (ext4_has_strict_mode(sbi) && IS_CASEFOLDED(dir) &&
utf8_validate(sbi->s_encoding, &dentry->d_name))
return -EINVAL;
#endif
retval = ext4_fname_setup_filename(dir, &dentry->d_name, 0, &fname);
if (retval)
return retval;
@@ -2975,6 +3038,17 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
ext4_update_dx_flag(dir);
ext4_mark_inode_dirty(handle, dir);
#ifdef CONFIG_UNICODE
/* VFS negative dentries are incompatible with Encoding and
* Case-insensitiveness. Eventually we'll want avoid
* invalidating the dentries here, alongside with returning the
* negative dentries at ext4_lookup(), when it is better
* supported by the VFS for the CI case.
*/
if (IS_CASEFOLDED(dir))
d_invalidate(dentry);
#endif
end_rmdir:
brelse(bh);
if (handle)
@@ -3044,6 +3118,17 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
#ifdef CONFIG_UNICODE
/* VFS negative dentries are incompatible with Encoding and
* Case-insensitiveness. Eventually we'll want avoid
* invalidating the dentries here, alongside with returning the
* negative dentries at ext4_lookup(), when it is better
* supported by the VFS for the CI case.
*/
if (IS_CASEFOLDED(dir))
d_invalidate(dentry);
#endif
end_unlink:
brelse(bh);
if (handle)

3
fs/ext4/readpage.c
View File

@@ -126,9 +126,10 @@ int ext4_mpage_readpages(struct address_space *mapping,
int fully_mapped = 1;
unsigned first_hole = blocks_per_page;
prefetchw(&page->flags);
if (pages) {
page = lru_to_page(pages);
prefetchw(&page->flags);
list_del(&page->lru);
if (add_to_page_cache_lru(page, mapping, page->index,
readahead_gfp_mask(mapping)))

1
fs/ext4/resize.c
View File

@@ -874,6 +874,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
if (unlikely(err)) {
ext4_std_error(sb, err);
iloc.bh = NULL;
goto errout;
}
brelse(dind);

151
fs/ext4/super.c
View File

@@ -42,6 +42,7 @@
#include <linux/cleancache.h>
#include <linux/uaccess.h>
#include <linux/iversion.h>
#include <linux/unicode.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
@@ -1054,6 +1055,9 @@ static void ext4_put_super(struct super_block *sb)
crypto_free_shash(sbi->s_chksum_driver);
kfree(sbi->s_blockgroup_lock);
fs_put_dax(sbi->s_daxdev);
#ifdef CONFIG_UNICODE
utf8_unload(sbi->s_encoding);
#endif
kfree(sbi);
}
@@ -1749,6 +1753,36 @@ static const struct mount_opts {
{Opt_err, 0, 0}
};
#ifdef CONFIG_UNICODE
static const struct ext4_sb_encodings {
__u16 magic;
char *name;
char *version;
} ext4_sb_encoding_map[] = {
{EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"},
};
static int ext4_sb_read_encoding(const struct ext4_super_block *es,
const struct ext4_sb_encodings **encoding,
__u16 *flags)
{
__u16 magic = le16_to_cpu(es->s_encoding);
int i;
for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++)
if (magic == ext4_sb_encoding_map[i].magic)
break;
if (i >= ARRAY_SIZE(ext4_sb_encoding_map))
return -EINVAL;
*encoding = &ext4_sb_encoding_map[i];
*flags = le16_to_cpu(es->s_encoding_flags);
return 0;
}
#endif
static int handle_mount_opt(struct super_block *sb, char *opt, int token,
substring_t *args, unsigned long *journal_devnum,
unsigned int *journal_ioprio, int is_remount)
@@ -2875,6 +2909,15 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
return 0;
}
#ifndef CONFIG_UNICODE
if (ext4_has_feature_casefold(sb)) {
ext4_msg(sb, KERN_ERR,
"Filesystem with casefold feature cannot be "
"mounted without CONFIG_UNICODE");
return 0;
}
#endif
if (readonly)
return 1;
@@ -3496,6 +3539,37 @@ int ext4_calculate_overhead(struct super_block *sb)
return 0;
}
static void ext4_clamp_want_extra_isize(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
/* determine the minimum size of new large inodes, if present */
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE &&
sbi->s_want_extra_isize == 0) {
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
if (ext4_has_feature_extra_isize(sb)) {
if (sbi->s_want_extra_isize <
le16_to_cpu(es->s_want_extra_isize))
sbi->s_want_extra_isize =
le16_to_cpu(es->s_want_extra_isize);
if (sbi->s_want_extra_isize <
le16_to_cpu(es->s_min_extra_isize))
sbi->s_want_extra_isize =
le16_to_cpu(es->s_min_extra_isize);
}
}
/* Check if enough inode space is available */
if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize >
sbi->s_inode_size) {
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
ext4_msg(sb, KERN_INFO,
"required extra inode space not available");
}
}
static void ext4_set_resv_clusters(struct super_block *sb)
{
ext4_fsblk_t resv_clusters;
@@ -3722,6 +3796,43 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
&journal_ioprio, 0))
goto failed_mount;
#ifdef CONFIG_UNICODE
if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) {
const struct ext4_sb_encodings *encoding_info;
struct unicode_map *encoding;
__u16 encoding_flags;
if (ext4_has_feature_encrypt(sb)) {
ext4_msg(sb, KERN_ERR,
"Can't mount with encoding and encryption");
goto failed_mount;
}
if (ext4_sb_read_encoding(es, &encoding_info,
&encoding_flags)) {
ext4_msg(sb, KERN_ERR,
"Encoding requested by superblock is unknown");
goto failed_mount;
}
encoding = utf8_load(encoding_info->version);
if (IS_ERR(encoding)) {
ext4_msg(sb, KERN_ERR,
"can't mount with superblock charset: %s-%s "
"not supported by the kernel. flags: 0x%x.",
encoding_info->name, encoding_info->version,
encoding_flags);
goto failed_mount;
}
ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: "
"%s-%s with flags 0x%hx", encoding_info->name,
encoding_info->version?:"\b", encoding_flags);
sbi->s_encoding = encoding;
sbi->s_encoding_flags = encoding_flags;
}
#endif
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
printk_once(KERN_WARNING "EXT4-fs: Warning: mounting "
"with data=journal disables delayed "
@@ -4219,7 +4330,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
"data=, fs mounted w/o journal");
goto failed_mount_wq;
}
sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM;
sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;
clear_opt(sb, JOURNAL_CHECKSUM);
clear_opt(sb, DATA_FLAGS);
sbi->s_journal = NULL;
@@ -4354,6 +4465,12 @@ no_journal:
iput(root);
goto failed_mount4;
}
#ifdef CONFIG_UNICODE
if (sbi->s_encoding)
sb->s_d_op = &ext4_dentry_ops;
#endif
sb->s_root = d_make_root(root);
if (!sb->s_root) {
ext4_msg(sb, KERN_ERR, "get root dentry failed");
@@ -4368,30 +4485,7 @@ no_journal:
} else if (ret)
goto failed_mount4a;
/* determine the minimum size of new large inodes, if present */
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE &&
sbi->s_want_extra_isize == 0) {
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
if (ext4_has_feature_extra_isize(sb)) {
if (sbi->s_want_extra_isize <
le16_to_cpu(es->s_want_extra_isize))
sbi->s_want_extra_isize =
le16_to_cpu(es->s_want_extra_isize);
if (sbi->s_want_extra_isize <
le16_to_cpu(es->s_min_extra_isize))
sbi->s_want_extra_isize =
le16_to_cpu(es->s_min_extra_isize);
}
}
/* Check if enough inode space is available */
if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize >
sbi->s_inode_size) {
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
ext4_msg(sb, KERN_INFO, "required extra inode space not"
"available");
}
ext4_clamp_want_extra_isize(sb);
ext4_set_resv_clusters(sb);
@@ -4559,6 +4653,11 @@ failed_mount2:
failed_mount:
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
#ifdef CONFIG_UNICODE
utf8_unload(sbi->s_encoding);
#endif
#ifdef CONFIG_QUOTA
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
@@ -5175,6 +5274,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
goto restore_opts;
}
ext4_clamp_want_extra_isize(sb);
if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
test_opt(sb, JOURNAL_CHECKSUM)) {
ext4_msg(sb, KERN_ERR, "changing journal_checksum "

6
fs/ext4/sysfs.c
View File

@@ -238,6 +238,9 @@ EXT4_ATTR_FEATURE(meta_bg_resize);
#ifdef CONFIG_FS_ENCRYPTION
EXT4_ATTR_FEATURE(encryption);
#endif
#ifdef CONFIG_UNICODE
EXT4_ATTR_FEATURE(casefold);
#endif
EXT4_ATTR_FEATURE(metadata_csum_seed);
static struct attribute *ext4_feat_attrs[] = {
@@ -246,6 +249,9 @@ static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(meta_bg_resize),
#ifdef CONFIG_FS_ENCRYPTION
ATTR_LIST(encryption),
#endif
#ifdef CONFIG_UNICODE
ATTR_LIST(casefold),
#endif
ATTR_LIST(metadata_csum_seed),
NULL,

2
fs/ext4/xattr.c
View File

@@ -1696,7 +1696,7 @@ static int ext4_xattr_set_entry(struct ext4_xattr_info *i,
/* No failures allowed past this point. */
if (!s->not_found && here->e_value_size && here->e_value_offs) {
if (!s->not_found && here->e_value_size && !here->e_value_inum) {
/* Remove the old value. */
void *first_val = s->base + min_offs;
size_t offs = le16_to_cpu(here->e_value_offs);