openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6:
  fat: Fix statfs->f_namelen
  fat: Replace all printk with fat_msg()
  fat: Add fat_msg() function for preformated FAT messages
  fat: Convert fat_fs_error to use %pV
  fat: Fix possible null deref in fat_cache_add()
  fat: use new setup() for ->dir_ops too
This commit is contained in:
Linus Torvalds 2011-05-23 21:11:38 -07:00
parent f4e0bcf06b f68e542f34
commit 343800e7d2
8 changed files with 104 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
fs/fat/cache.c
View File

@ -151,6 +151,13 @@ static void fat_cache_add(struct inode *inode, struct fat_cache_id *new)
spin_unlock(&MSDOS_I(inode)->cache_lru_lock);
tmp = fat_cache_alloc(inode);
if (!tmp) {
spin_lock(&MSDOS_I(inode)->cache_lru_lock);
MSDOS_I(inode)->nr_caches--;
spin_unlock(&MSDOS_I(inode)->cache_lru_lock);
return;
}
spin_lock(&MSDOS_I(inode)->cache_lru_lock);
cache = fat_cache_merge(inode, new);
if (cache != NULL) {

32
fs/fat/dir.c
View File

@ -98,7 +98,7 @@ static int fat__get_entry(struct inode *dir, loff_t *pos,
*bh = sb_bread(sb, phys);
if (*bh == NULL) {
printk(KERN_ERR "FAT: Directory bread(block %llu) failed\n",
fat_msg(sb, KERN_ERR, "Directory bread(block %llu) failed",
(llu)phys);
/* skip this block */
*pos = (iblock + 1) << sb->s_blocksize_bits;
@ -136,9 +136,10 @@ static inline int fat_get_entry(struct inode *dir, loff_t *pos,
* but ignore that right now.
* Ahem... Stack smashing in ring 0 isn't fun. Fixed.
*/
static int uni16_to_x8(unsigned char *ascii, const wchar_t *uni, int len,
int uni_xlate, struct nls_table *nls)
static int uni16_to_x8(struct super_block *sb, unsigned char *ascii,
const wchar_t *uni, int len, struct nls_table *nls)
{
int uni_xlate = MSDOS_SB(sb)->options.unicode_xlate;
const wchar_t *ip;
wchar_t ec;
unsigned char *op;
@ -166,23 +167,23 @@ static int uni16_to_x8(unsigned char *ascii, const wchar_t *uni, int len,
}
if (unlikely(*ip)) {
printk(KERN_WARNING "FAT: filename was truncated while "
"converting.");
fat_msg(sb, KERN_WARNING, "filename was truncated while "
"converting.");
}
*op = 0;
return (op - ascii);
}
static inline int fat_uni_to_x8(struct msdos_sb_info *sbi, const wchar_t *uni,
static inline int fat_uni_to_x8(struct super_block *sb, const wchar_t *uni,
unsigned char *buf, int size)
{
struct msdos_sb_info *sbi = MSDOS_SB(sb);
if (sbi->options.utf8)
return utf16s_to_utf8s(uni, FAT_MAX_UNI_CHARS,
UTF16_HOST_ENDIAN, buf, size);
else
return uni16_to_x8(buf, uni, size, sbi->options.unicode_xlate,
sbi->nls_io);
return uni16_to_x8(sb, buf, uni, size, sbi->nls_io);
}
static inline int
@ -419,7 +420,7 @@ int fat_search_long(struct inode *inode, const unsigned char *name,
/* Compare shortname */
bufuname[last_u] = 0x0000;
len = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
len = fat_uni_to_x8(sb, bufuname, bufname, sizeof(bufname));
if (fat_name_match(sbi, name, name_len, bufname, len))
goto found;
@ -428,7 +429,7 @@ int fat_search_long(struct inode *inode, const unsigned char *name,
int size = PATH_MAX - FAT_MAX_UNI_SIZE;
/* Compare longname */
len = fat_uni_to_x8(sbi, unicode, longname, size);
len = fat_uni_to_x8(sb, unicode, longname, size);
if (fat_name_match(sbi, name, name_len, longname, len))
goto found;
}
@ -545,7 +546,7 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
if (nr_slots) {
void *longname = unicode + FAT_MAX_UNI_CHARS;
int size = PATH_MAX - FAT_MAX_UNI_SIZE;
int len = fat_uni_to_x8(sbi, unicode, longname, size);
int len = fat_uni_to_x8(sb, unicode, longname, size);
fill_name = longname;
fill_len = len;
@ -621,7 +622,7 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
if (isvfat) {
bufuname[j] = 0x0000;
i = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
i = fat_uni_to_x8(sb, bufuname, bufname, sizeof(bufname));
}
if (nr_slots) {
/* hack for fat_ioctl_filldir() */
@ -979,6 +980,7 @@ static int __fat_remove_entries(struct inode *dir, loff_t pos, int nr_slots)
int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo)
{
struct super_block *sb = dir->i_sb;
struct msdos_dir_entry *de;
struct buffer_head *bh;
int err = 0, nr_slots;
@ -1013,8 +1015,8 @@ int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo)
*/
err = __fat_remove_entries(dir, sinfo->slot_off, nr_slots);
if (err) {
printk(KERN_WARNING
"FAT: Couldn't remove the long name slots\n");
fat_msg(sb, KERN_WARNING,
"Couldn't remove the long name slots");
}
}
@ -1265,7 +1267,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
if (sbi->fat_bits != 32)
goto error;
} else if (MSDOS_I(dir)->i_start == 0) {
printk(KERN_ERR "FAT: Corrupted directory (i_pos %lld)\n",
fat_msg(sb, KERN_ERR, "Corrupted directory (i_pos %lld)",
MSDOS_I(dir)->i_pos);
err = -EIO;
goto error;

15
fs/fat/fat.h
View File

@ -319,19 +319,20 @@ extern struct inode *fat_build_inode(struct super_block *sb,
struct msdos_dir_entry *de, loff_t i_pos);
extern int fat_sync_inode(struct inode *inode);
extern int fat_fill_super(struct super_block *sb, void *data, int silent,
const struct inode_operations *fs_dir_inode_ops,
int isvfat, void (*setup)(struct super_block *));
int isvfat, void (*setup)(struct super_block *));
extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
struct inode *i2);
/* fat/misc.c */
extern void
__fat_fs_error(struct super_block *s, int report, const char *fmt, ...)
__fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
__attribute__ ((format (printf, 3, 4))) __cold;
#define fat_fs_error(sb, fmt, args...) \
__fat_fs_error(sb, 1, fmt , ## args)
#define fat_fs_error_ratelimit(sb, fmt, args...) \
__fat_fs_error(sb, __ratelimit(&MSDOS_SB(sb)->ratelimit), fmt , ## args)
void fat_msg(struct super_block *sb, const char *level, const char *fmt, ...)
__attribute__ ((format (printf, 3, 4))) __cold;
#define fat_fs_error(s, fmt, args...) \
__fat_fs_error(s, 1, fmt , ## args)
#define fat_fs_error_ratelimit(s, fmt, args...) \
__fat_fs_error(s, __ratelimit(&MSDOS_SB(s)->ratelimit), fmt , ## args)
extern int fat_clusters_flush(struct super_block *sb);
extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,

4
fs/fat/fatent.c
View File

@ -95,7 +95,7 @@ static int fat12_ent_bread(struct super_block *sb, struct fat_entry *fatent,
err_brelse:
brelse(bhs[0]);
err:
printk(KERN_ERR "FAT: FAT read failed (blocknr %llu)\n", (llu)blocknr);
fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)", (llu)blocknr);
return -EIO;
}
@ -108,7 +108,7 @@ static int fat_ent_bread(struct super_block *sb, struct fat_entry *fatent,
fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
fatent->bhs[0] = sb_bread(sb, blocknr);
if (!fatent->bhs[0]) {
printk(KERN_ERR "FAT: FAT read failed (blocknr %llu)\n",
fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
(llu)blocknr);
return -EIO;
}

74
fs/fat/inode.c
View File

@ -581,7 +581,8 @@ static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_bavail = sbi->free_clusters;
buf->f_fsid.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = sbi->options.isvfat ? FAT_LFN_LEN : 12;
buf->f_namelen =
(sbi->options.isvfat ? FAT_LFN_LEN : 12) * NLS_MAX_CHARSET_SIZE;
return 0;
}
@ -619,8 +620,8 @@ static int __fat_write_inode(struct inode *inode, int wait)
bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
if (!bh) {
printk(KERN_ERR "FAT: unable to read inode block "
"for updating (i_pos %lld)\n", i_pos);
fat_msg(sb, KERN_ERR, "unable to read inode block "
"for updating (i_pos %lld)", i_pos);
return -EIO;
}
spin_lock(&sbi->inode_hash_lock);
@ -976,8 +977,8 @@ static const match_table_t vfat_tokens = {
{Opt_err, NULL}
};
static int parse_options(char *options, int is_vfat, int silent, int *debug,
struct fat_mount_options *opts)
static int parse_options(struct super_block *sb, char *options, int is_vfat,
int silent, int *debug, struct fat_mount_options *opts)
{
char *p;
substring_t args[MAX_OPT_ARGS];
@ -1168,15 +1169,15 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
/* obsolete mount options */
case Opt_obsolate:
printk(KERN_INFO "FAT: \"%s\" option is obsolete, "
"not supported now\n", p);
fat_msg(sb, KERN_INFO, "\"%s\" option is obsolete, "
"not supported now", p);
break;
/* unknown option */
default:
if (!silent) {
printk(KERN_ERR
"FAT: Unrecognized mount option \"%s\" "
"or missing value\n", p);
fat_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" "
"or missing value", p);
}
return -EINVAL;
}
@ -1185,7 +1186,7 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
out:
/* UTF-8 doesn't provide FAT semantics */
if (!strcmp(opts->iocharset, "utf8")) {
printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
fat_msg(sb, KERN_ERR, "utf8 is not a recommended IO charset"
" for FAT filesystems, filesystem will be "
"case sensitive!\n");
}
@ -1238,8 +1239,7 @@ static int fat_read_root(struct inode *inode)
/*
* Read the super block of an MS-DOS FS.
*/
int fat_fill_super(struct super_block *sb, void *data, int silent,
const struct inode_operations *fs_dir_inode_ops, int isvfat,
int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
void (*setup)(struct super_block *))
{
struct inode *root_inode = NULL, *fat_inode = NULL;
@ -1268,11 +1268,10 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sb->s_magic = MSDOS_SUPER_MAGIC;
sb->s_op = &fat_sops;
sb->s_export_op = &fat_export_ops;
sbi->dir_ops = fs_dir_inode_ops;
ratelimit_state_init(&sbi->ratelimit, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
error = parse_options(data, isvfat, silent, &debug, &sbi->options);
error = parse_options(sb, data, isvfat, silent, &debug, &sbi->options);
if (error)
goto out_fail;
@ -1282,20 +1281,20 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sb_min_blocksize(sb, 512);
bh = sb_bread(sb, 0);
if (bh == NULL) {
printk(KERN_ERR "FAT: unable to read boot sector\n");
fat_msg(sb, KERN_ERR, "unable to read boot sector");
goto out_fail;
}
b = (struct fat_boot_sector *) bh->b_data;
if (!b->reserved) {
if (!silent)
printk(KERN_ERR "FAT: bogus number of reserved sectors\n");
fat_msg(sb, KERN_ERR, "bogus number of reserved sectors");
brelse(bh);
goto out_invalid;
}
if (!b->fats) {
if (!silent)
printk(KERN_ERR "FAT: bogus number of FAT structure\n");
fat_msg(sb, KERN_ERR, "bogus number of FAT structure");
brelse(bh);
goto out_invalid;
}
@ -1308,7 +1307,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
media = b->media;
if (!fat_valid_media(media)) {
if (!silent)
printk(KERN_ERR "FAT: invalid media value (0x%02x)\n",
fat_msg(sb, KERN_ERR, "invalid media value (0x%02x)",
media);
brelse(bh);
goto out_invalid;
@ -1318,7 +1317,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
|| (logical_sector_size < 512)
|| (logical_sector_size > 4096)) {
if (!silent)
printk(KERN_ERR "FAT: bogus logical sector size %u\n",
fat_msg(sb, KERN_ERR, "bogus logical sector size %u",
logical_sector_size);
brelse(bh);
goto out_invalid;
@ -1326,15 +1325,15 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sbi->sec_per_clus = b->sec_per_clus;
if (!is_power_of_2(sbi->sec_per_clus)) {
if (!silent)
printk(KERN_ERR "FAT: bogus sectors per cluster %u\n",
fat_msg(sb, KERN_ERR, "bogus sectors per cluster %u",
sbi->sec_per_clus);
brelse(bh);
goto out_invalid;
}
if (logical_sector_size < sb->s_blocksize) {
printk(KERN_ERR "FAT: logical sector size too small for device"
" (logical sector size = %u)\n", logical_sector_size);
fat_msg(sb, KERN_ERR, "logical sector size too small for device"
" (logical sector size = %u)", logical_sector_size);
brelse(bh);
goto out_fail;
}
@ -1342,14 +1341,14 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
brelse(bh);
if (!sb_set_blocksize(sb, logical_sector_size)) {
printk(KERN_ERR "FAT: unable to set blocksize %u\n",
fat_msg(sb, KERN_ERR, "unable to set blocksize %u",
logical_sector_size);
goto out_fail;
}
bh = sb_bread(sb, 0);
if (bh == NULL) {
printk(KERN_ERR "FAT: unable to read boot sector"
" (logical sector size = %lu)\n",
fat_msg(sb, KERN_ERR, "unable to read boot sector"
" (logical sector size = %lu)",
sb->s_blocksize);
goto out_fail;
}
@ -1385,16 +1384,16 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
fsinfo_bh = sb_bread(sb, sbi->fsinfo_sector);
if (fsinfo_bh == NULL) {
printk(KERN_ERR "FAT: bread failed, FSINFO block"
" (sector = %lu)\n", sbi->fsinfo_sector);
fat_msg(sb, KERN_ERR, "bread failed, FSINFO block"
" (sector = %lu)", sbi->fsinfo_sector);
brelse(bh);
goto out_fail;
}
fsinfo = (struct fat_boot_fsinfo *)fsinfo_bh->b_data;
if (!IS_FSINFO(fsinfo)) {
printk(KERN_WARNING "FAT: Invalid FSINFO signature: "
"0x%08x, 0x%08x (sector = %lu)\n",
fat_msg(sb, KERN_WARNING, "Invalid FSINFO signature: "
"0x%08x, 0x%08x (sector = %lu)",
le32_to_cpu(fsinfo->signature1),
le32_to_cpu(fsinfo->signature2),
sbi->fsinfo_sector);
@ -1415,8 +1414,8 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sbi->dir_entries = get_unaligned_le16(&b->dir_entries);
if (sbi->dir_entries & (sbi->dir_per_block - 1)) {
if (!silent)
printk(KERN_ERR "FAT: bogus directroy-entries per block"
" (%u)\n", sbi->dir_entries);
fat_msg(sb, KERN_ERR, "bogus directroy-entries per block"
" (%u)", sbi->dir_entries);
brelse(bh);
goto out_invalid;
}
@ -1438,7 +1437,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
total_clusters = min(total_clusters, fat_clusters - FAT_START_ENT);
if (total_clusters > MAX_FAT(sb)) {
if (!silent)
printk(KERN_ERR "FAT: count of clusters too big (%u)\n",
fat_msg(sb, KERN_ERR, "count of clusters too big (%u)",
total_clusters);
brelse(bh);
goto out_invalid;
@ -1471,7 +1470,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sprintf(buf, "cp%d", sbi->options.codepage);
sbi->nls_disk = load_nls(buf);
if (!sbi->nls_disk) {
printk(KERN_ERR "FAT: codepage %s not found\n", buf);
fat_msg(sb, KERN_ERR, "codepage %s not found", buf);
goto out_fail;
}
@ -1479,7 +1478,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
if (sbi->options.isvfat) {
sbi->nls_io = load_nls(sbi->options.iocharset);
if (!sbi->nls_io) {
printk(KERN_ERR "FAT: IO charset %s not found\n",
fat_msg(sb, KERN_ERR, "IO charset %s not found",
sbi->options.iocharset);
goto out_fail;
}
@ -1503,7 +1502,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
insert_inode_hash(root_inode);
sb->s_root = d_alloc_root(root_inode);
if (!sb->s_root) {
printk(KERN_ERR "FAT: get root inode failed\n");
fat_msg(sb, KERN_ERR, "get root inode failed");
goto out_fail;
}
@ -1512,8 +1511,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
out_invalid:
error = -EINVAL;
if (!silent)
printk(KERN_INFO "VFS: Can't find a valid FAT filesystem"
" on dev %s.\n", sb->s_id);
fat_msg(sb, KERN_INFO, "Can't find a valid FAT filesystem");
out_fail:
if (fat_inode)

44
fs/fat/misc.c
View File

@ -20,30 +20,46 @@
* In case the file system is remounted read-only, it can be made writable
* again by remounting it.
*/
void __fat_fs_error(struct super_block *s, int report, const char *fmt, ...)
void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
{
struct fat_mount_options *opts = &MSDOS_SB(s)->options;
struct fat_mount_options *opts = &MSDOS_SB(sb)->options;
va_list args;
struct va_format vaf;
if (report) {
printk(KERN_ERR "FAT: Filesystem error (dev %s)\n", s->s_id);
printk(KERN_ERR " ");
va_start(args, fmt);
vprintk(fmt, args);
vaf.fmt = fmt;
vaf.va = &args;
printk(KERN_ERR "FAT-fs (%s): error, %pV\n", sb->s_id, &vaf);
va_end(args);
printk("\n");
}
if (opts->errors == FAT_ERRORS_PANIC)
panic("FAT: fs panic from previous error\n");
else if (opts->errors == FAT_ERRORS_RO && !(s->s_flags & MS_RDONLY)) {
s->s_flags |= MS_RDONLY;
printk(KERN_ERR "FAT: Filesystem has been set read-only\n");
panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id);
else if (opts->errors == FAT_ERRORS_RO && !(sb->s_flags & MS_RDONLY)) {
sb->s_flags |= MS_RDONLY;
printk(KERN_ERR "FAT-fs (%s): Filesystem has been "
"set read-only\n", sb->s_id);
}
}
EXPORT_SYMBOL_GPL(__fat_fs_error);
/**
* fat_msg() - print preformated FAT specific messages. Every thing what is
* not fat_fs_error() should be fat_msg().
*/
void fat_msg(struct super_block *sb, const char *level, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk("%sFAT-fs (%s): %pV\n", level, sb->s_id, &vaf);
va_end(args);
}
/* Flushes the number of free clusters on FAT32 */
/* XXX: Need to write one per FSINFO block. Currently only writes 1 */
int fat_clusters_flush(struct super_block *sb)
@ -57,15 +73,15 @@ int fat_clusters_flush(struct super_block *sb)
bh = sb_bread(sb, sbi->fsinfo_sector);
if (bh == NULL) {
printk(KERN_ERR "FAT: bread failed in fat_clusters_flush\n");
fat_msg(sb, KERN_ERR, "bread failed in fat_clusters_flush");
return -EIO;
}
fsinfo = (struct fat_boot_fsinfo *)bh->b_data;
/* Sanity check */
if (!IS_FSINFO(fsinfo)) {
printk(KERN_ERR "FAT: Invalid FSINFO signature: "
"0x%08x, 0x%08x (sector = %lu)\n",
fat_msg(sb, KERN_ERR, "Invalid FSINFO signature: "
"0x%08x, 0x%08x (sector = %lu)",
le32_to_cpu(fsinfo->signature1),
le32_to_cpu(fsinfo->signature2),
sbi->fsinfo_sector);

4
fs/fat/namei_msdos.c
View File

@ -659,14 +659,14 @@ static const struct inode_operations msdos_dir_inode_operations = {
static void setup(struct super_block *sb)
{
MSDOS_SB(sb)->dir_ops = &msdos_dir_inode_operations;
sb->s_d_op = &msdos_dentry_operations;
sb->s_flags |= MS_NOATIME;
}
static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
return fat_fill_super(sb, data, silent, &msdos_dir_inode_operations,
0, setup);
return fat_fill_super(sb, data, silent, 0, setup);
}
static struct dentry *msdos_mount(struct file_system_type *fs_type,

4
fs/fat/namei_vfat.c
View File

@ -1065,6 +1065,7 @@ static const struct inode_operations vfat_dir_inode_operations = {
static void setup(struct super_block *sb)
{
MSDOS_SB(sb)->dir_ops = &vfat_dir_inode_operations;
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_d_op = &vfat_ci_dentry_ops;
else
@ -1073,8 +1074,7 @@ static void setup(struct super_block *sb)
static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
return fat_fill_super(sb, data, silent, &vfat_dir_inode_operations,
1, setup);
return fat_fill_super(sb, data, silent, 1, setup);
}
static struct dentry *vfat_mount(struct file_system_type *fs_type,