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-rw-r--r--fs/exfat/Kconfig7
-rw-r--r--fs/exfat/balloc.c8
-rw-r--r--fs/exfat/dir.c222
-rw-r--r--fs/exfat/exfat_fs.h48
-rw-r--r--fs/exfat/exfat_raw.h85
-rw-r--r--fs/exfat/fatent.c17
-rw-r--r--fs/exfat/file.c25
-rw-r--r--fs/exfat/inode.c57
-rw-r--r--fs/exfat/misc.c46
-rw-r--r--fs/exfat/namei.c63
-rw-r--r--fs/exfat/nls.c52
-rw-r--r--fs/exfat/super.c262
12 files changed, 423 insertions, 469 deletions
diff --git a/fs/exfat/Kconfig b/fs/exfat/Kconfig
index 2d3636dc5b8c..5a65071b5ecf 100644
--- a/fs/exfat/Kconfig
+++ b/fs/exfat/Kconfig
@@ -16,6 +16,7 @@ config EXFAT_DEFAULT_IOCHARSET
depends on EXFAT_FS
help
Set this to the default input/output character set to use for
- converting between the encoding is used for user visible filename and
- UTF-16 character that exfat filesystem use, and can be overridden with
- the "iocharset" mount option for exFAT filesystems.
+ converting between the encoding that is used for user visible
+ filenames and the UTF-16 character encoding that the exFAT
+ filesystem uses. This can be overridden with the "iocharset" mount
+ option for the exFAT filesystems.
diff --git a/fs/exfat/balloc.c b/fs/exfat/balloc.c
index 6774a5a6ded8..4055eb00ea9b 100644
--- a/fs/exfat/balloc.c
+++ b/fs/exfat/balloc.c
@@ -58,9 +58,8 @@ static int exfat_allocate_bitmap(struct super_block *sb,
need_map_size = ((EXFAT_DATA_CLUSTER_COUNT(sbi) - 1) / BITS_PER_BYTE)
+ 1;
if (need_map_size != map_size) {
- exfat_msg(sb, KERN_ERR,
- "bogus allocation bitmap size(need : %u, cur : %lld)",
- need_map_size, map_size);
+ exfat_err(sb, "bogus allocation bitmap size(need : %u, cur : %lld)",
+ need_map_size, map_size);
/*
* Only allowed when bogus allocation
* bitmap size is large
@@ -192,8 +191,7 @@ void exfat_clear_bitmap(struct inode *inode, unsigned int clu)
(1 << sbi->sect_per_clus_bits), GFP_NOFS, 0);
if (ret_discard == -EOPNOTSUPP) {
- exfat_msg(sb, KERN_ERR,
- "discard not supported by device, disabling");
+ exfat_err(sb, "discard not supported by device, disabling");
opts->discard = 0;
}
}
diff --git a/fs/exfat/dir.c b/fs/exfat/dir.c
index 4b91afb0f051..de43534aa299 100644
--- a/fs/exfat/dir.c
+++ b/fs/exfat/dir.c
@@ -32,35 +32,30 @@ static void exfat_get_uniname_from_ext_entry(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned short *uniname)
{
int i;
- struct exfat_dentry *ep;
struct exfat_entry_set_cache *es;
- es = exfat_get_dentry_set(sb, p_dir, entry, ES_ALL_ENTRIES, &ep);
+ es = exfat_get_dentry_set(sb, p_dir, entry, ES_ALL_ENTRIES);
if (!es)
return;
- if (es->num_entries < 3)
- goto free_es;
-
- ep += 2;
-
/*
* First entry : file entry
* Second entry : stream-extension entry
* Third entry : first file-name entry
* So, the index of first file-name dentry should start from 2.
*/
- for (i = 2; i < es->num_entries; i++, ep++) {
+ for (i = 2; i < es->num_entries; i++) {
+ struct exfat_dentry *ep = exfat_get_dentry_cached(es, i);
+
/* end of name entry */
if (exfat_get_entry_type(ep) != TYPE_EXTEND)
- goto free_es;
+ break;
exfat_extract_uni_name(ep, uniname);
uniname += EXFAT_FILE_NAME_LEN;
}
-free_es:
- kfree(es);
+ exfat_free_dentry_set(es, false);
}
/* read a directory entry from the opened directory */
@@ -137,12 +132,12 @@ static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
ep->dentry.file.create_tz,
ep->dentry.file.create_time,
ep->dentry.file.create_date,
- ep->dentry.file.create_time_ms);
+ ep->dentry.file.create_time_cs);
exfat_get_entry_time(sbi, &dir_entry->mtime,
ep->dentry.file.modify_tz,
ep->dentry.file.modify_time,
ep->dentry.file.modify_date,
- ep->dentry.file.modify_time_ms);
+ ep->dentry.file.modify_time_cs);
exfat_get_entry_time(sbi, &dir_entry->atime,
ep->dentry.file.access_tz,
ep->dentry.file.access_time,
@@ -461,12 +456,12 @@ int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
&ep->dentry.file.create_tz,
&ep->dentry.file.create_time,
&ep->dentry.file.create_date,
- &ep->dentry.file.create_time_ms);
+ &ep->dentry.file.create_time_cs);
exfat_set_entry_time(sbi, &ts,
&ep->dentry.file.modify_tz,
&ep->dentry.file.modify_time,
&ep->dentry.file.modify_date,
- &ep->dentry.file.modify_time_ms);
+ &ep->dentry.file.modify_time_cs);
exfat_set_entry_time(sbi, &ts,
&ep->dentry.file.access_tz,
&ep->dentry.file.access_time,
@@ -496,7 +491,7 @@ int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
int ret = 0;
int i, num_entries;
sector_t sector;
- unsigned short chksum;
+ u16 chksum;
struct exfat_dentry *ep, *fep;
struct buffer_head *fbh, *bh;
@@ -505,7 +500,7 @@ int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
return -EIO;
num_entries = fep->dentry.file.num_ext + 1;
- chksum = exfat_calc_chksum_2byte(fep, DENTRY_SIZE, 0, CS_DIR_ENTRY);
+ chksum = exfat_calc_chksum16(fep, DENTRY_SIZE, 0, CS_DIR_ENTRY);
for (i = 1; i < num_entries; i++) {
ep = exfat_get_dentry(sb, p_dir, entry + i, &bh, NULL);
@@ -513,7 +508,7 @@ int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
ret = -EIO;
goto release_fbh;
}
- chksum = exfat_calc_chksum_2byte(ep, DENTRY_SIZE, chksum,
+ chksum = exfat_calc_chksum16(ep, DENTRY_SIZE, chksum,
CS_DEFAULT);
brelse(bh);
}
@@ -590,62 +585,33 @@ int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
return 0;
}
-int exfat_update_dir_chksum_with_entry_set(struct super_block *sb,
- struct exfat_entry_set_cache *es, int sync)
+void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct buffer_head *bh;
- sector_t sec = es->sector;
- unsigned int off = es->offset;
- int chksum_type = CS_DIR_ENTRY, i, num_entries = es->num_entries;
- unsigned int buf_off = (off - es->offset);
- unsigned int remaining_byte_in_sector, copy_entries, clu;
+ int chksum_type = CS_DIR_ENTRY, i;
unsigned short chksum = 0;
+ struct exfat_dentry *ep;
- for (i = 0; i < num_entries; i++) {
- chksum = exfat_calc_chksum_2byte(&es->entries[i], DENTRY_SIZE,
- chksum, chksum_type);
+ for (i = 0; i < es->num_entries; i++) {
+ ep = exfat_get_dentry_cached(es, i);
+ chksum = exfat_calc_chksum16(ep, DENTRY_SIZE, chksum,
+ chksum_type);
chksum_type = CS_DEFAULT;
}
+ ep = exfat_get_dentry_cached(es, 0);
+ ep->dentry.file.checksum = cpu_to_le16(chksum);
+ es->modified = true;
+}
- es->entries[0].dentry.file.checksum = cpu_to_le16(chksum);
+void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
+{
+ int i;
- while (num_entries) {
- /* write per sector base */
- remaining_byte_in_sector = (1 << sb->s_blocksize_bits) - off;
- copy_entries = min_t(int,
- EXFAT_B_TO_DEN(remaining_byte_in_sector),
- num_entries);
- bh = sb_bread(sb, sec);
- if (!bh)
- goto err_out;
- memcpy(bh->b_data + off,
- (unsigned char *)&es->entries[0] + buf_off,
- EXFAT_DEN_TO_B(copy_entries));
- exfat_update_bh(sb, bh, sync);
- brelse(bh);
- num_entries -= copy_entries;
-
- if (num_entries) {
- /* get next sector */
- if (exfat_is_last_sector_in_cluster(sbi, sec)) {
- clu = exfat_sector_to_cluster(sbi, sec);
- if (es->alloc_flag == ALLOC_NO_FAT_CHAIN)
- clu++;
- else if (exfat_get_next_cluster(sb, &clu))
- goto err_out;
- sec = exfat_cluster_to_sector(sbi, clu);
- } else {
- sec++;
- }
- off = 0;
- buf_off += EXFAT_DEN_TO_B(copy_entries);
- }
+ for (i = 0; i < es->num_bh; i++) {
+ if (es->modified)
+ exfat_update_bh(es->sb, es->bh[i], sync);
+ brelse(es->bh[i]);
}
-
- return 0;
-err_out:
- return -EIO;
+ kfree(es);
}
static int exfat_walk_fat_chain(struct super_block *sb,
@@ -720,9 +686,8 @@ static int exfat_dir_readahead(struct super_block *sb, sector_t sec)
return 0;
if (sec < sbi->data_start_sector) {
- exfat_msg(sb, KERN_ERR,
- "requested sector is invalid(sect:%llu, root:%llu)",
- (unsigned long long)sec, sbi->data_start_sector);
+ exfat_err(sb, "requested sector is invalid(sect:%llu, root:%llu)",
+ (unsigned long long)sec, sbi->data_start_sector);
return -EIO;
}
@@ -750,7 +715,7 @@ struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
sector_t sec;
if (p_dir->dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR, "abnormal access to deleted dentry\n");
+ exfat_err(sb, "abnormal access to deleted dentry");
return NULL;
}
@@ -821,39 +786,45 @@ static bool exfat_validate_entry(unsigned int type,
}
}
+struct exfat_dentry *exfat_get_dentry_cached(
+ struct exfat_entry_set_cache *es, int num)
+{
+ int off = es->start_off + num * DENTRY_SIZE;
+ struct buffer_head *bh = es->bh[EXFAT_B_TO_BLK(off, es->sb)];
+ char *p = bh->b_data + EXFAT_BLK_OFFSET(off, es->sb);
+
+ return (struct exfat_dentry *)p;
+}
+
/*
* Returns a set of dentries for a file or dir.
*
- * Note that this is a copy (dump) of dentries so that user should
- * call write_entry_set() to apply changes made in this entry set
- * to the real device.
+ * Note It provides a direct pointer to bh->data via exfat_get_dentry_cached().
+ * User should call exfat_get_dentry_set() after setting 'modified' to apply
+ * changes made in this entry set to the real device.
*
* in:
* sb+p_dir+entry: indicates a file/dir
* type: specifies how many dentries should be included.
- * out:
- * file_ep: will point the first dentry(= file dentry) on success
* return:
* pointer of entry set on success,
* NULL on failure.
*/
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
- struct exfat_chain *p_dir, int entry, unsigned int type,
- struct exfat_dentry **file_ep)
+ struct exfat_chain *p_dir, int entry, unsigned int type)
{
- int ret;
+ int ret, i, num_bh;
unsigned int off, byte_offset, clu = 0;
- unsigned int entry_type;
sector_t sec;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_entry_set_cache *es;
- struct exfat_dentry *ep, *pos;
- unsigned char num_entries;
+ struct exfat_dentry *ep;
+ int num_entries;
enum exfat_validate_dentry_mode mode = ES_MODE_STARTED;
struct buffer_head *bh;
if (p_dir->dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR, "access to deleted dentry\n");
+ exfat_err(sb, "access to deleted dentry");
return NULL;
}
@@ -862,11 +833,18 @@ struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
if (ret)
return NULL;
+ es = kzalloc(sizeof(*es), GFP_KERNEL);
+ if (!es)
+ return NULL;
+ es->sb = sb;
+ es->modified = false;
+
/* byte offset in cluster */
byte_offset = EXFAT_CLU_OFFSET(byte_offset, sbi);
/* byte offset in sector */
off = EXFAT_BLK_OFFSET(byte_offset, sb);
+ es->start_off = off;
/* sector offset in cluster */
sec = EXFAT_B_TO_BLK(byte_offset, sb);
@@ -874,72 +852,46 @@ struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
bh = sb_bread(sb, sec);
if (!bh)
- return NULL;
-
- ep = (struct exfat_dentry *)(bh->b_data + off);
- entry_type = exfat_get_entry_type(ep);
+ goto free_es;
+ es->bh[es->num_bh++] = bh;
- if (entry_type != TYPE_FILE && entry_type != TYPE_DIR)
- goto release_bh;
+ ep = exfat_get_dentry_cached(es, 0);
+ if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
+ goto free_es;
num_entries = type == ES_ALL_ENTRIES ?
ep->dentry.file.num_ext + 1 : type;
- es = kmalloc(struct_size(es, entries, num_entries), GFP_KERNEL);
- if (!es)
- goto release_bh;
-
es->num_entries = num_entries;
- es->sector = sec;
- es->offset = off;
- es->alloc_flag = p_dir->flags;
-
- pos = &es->entries[0];
-
- while (num_entries) {
- if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
- goto free_es;
-
- /* copy dentry */
- memcpy(pos, ep, sizeof(struct exfat_dentry));
-
- if (--num_entries == 0)
- break;
-
- if (((off + DENTRY_SIZE) & (sb->s_blocksize - 1)) <
- (off & (sb->s_blocksize - 1))) {
- /* get the next sector */
- if (exfat_is_last_sector_in_cluster(sbi, sec)) {
- if (es->alloc_flag == ALLOC_NO_FAT_CHAIN)
- clu++;
- else if (exfat_get_next_cluster(sb, &clu))
- goto free_es;
- sec = exfat_cluster_to_sector(sbi, clu);
- } else {
- sec++;
- }
- brelse(bh);
- bh = sb_bread(sb, sec);
- if (!bh)
+ num_bh = EXFAT_B_TO_BLK_ROUND_UP(off + num_entries * DENTRY_SIZE, sb);
+ for (i = 1; i < num_bh; i++) {
+ /* get the next sector */
+ if (exfat_is_last_sector_in_cluster(sbi, sec)) {
+ if (p_dir->flags == ALLOC_NO_FAT_CHAIN)
+ clu++;
+ else if (exfat_get_next_cluster(sb, &clu))
goto free_es;
- off = 0;
- ep = (struct exfat_dentry *)bh->b_data;
+ sec = exfat_cluster_to_sector(sbi, clu);
} else {
- ep++;
- off += DENTRY_SIZE;
+ sec++;
}
- pos++;
+
+ bh = sb_bread(sb, sec);
+ if (!bh)
+ goto free_es;
+ es->bh[es->num_bh++] = bh;
}
- if (file_ep)
- *file_ep = &es->entries[0];
- brelse(bh);
+ /* validiate cached dentries */
+ for (i = 1; i < num_entries; i++) {
+ ep = exfat_get_dentry_cached(es, i);
+ if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
+ goto free_es;
+ }
return es;
free_es:
- kfree(es);
-release_bh:
- brelse(bh);
+ exfat_free_dentry_set(es, false);
return NULL;
}
@@ -1048,7 +1000,7 @@ rewind:
}
if (entry_type == TYPE_STREAM) {
- unsigned short name_hash;
+ u16 name_hash;
if (step != DIRENT_STEP_STRM) {
step = DIRENT_STEP_FILE;
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index d67fb8a6f770..595f3117f492 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -71,10 +71,8 @@ enum {
#define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */
#define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE)
-#define FAT_CACHE_SIZE 128
-#define FAT_CACHE_HASH_SIZE 64
-#define BUF_CACHE_SIZE 256
-#define BUF_CACHE_HASH_SIZE 64
+/* Enough size to hold 256 dentry (even 512 Byte sector) */
+#define DIR_CACHE_SIZE (256*sizeof(struct exfat_dentry)/512+1)
#define EXFAT_HINT_NONE -1
#define EXFAT_MIN_SUBDIR 2
@@ -139,7 +137,7 @@ struct exfat_dentry_namebuf {
struct exfat_uni_name {
/* +3 for null and for converting */
unsigned short name[MAX_NAME_LENGTH + 3];
- unsigned short name_hash;
+ u16 name_hash;
unsigned char name_len;
};
@@ -170,14 +168,12 @@ struct exfat_hint {
};
struct exfat_entry_set_cache {
- /* sector number that contains file_entry */
- sector_t sector;
- /* byte offset in the sector */
- unsigned int offset;
- /* flag in stream entry. 01 for cluster chain, 03 for contig. */
- int alloc_flag;
+ struct super_block *sb;
+ bool modified;
+ unsigned int start_off;
+ int num_bh;
+ struct buffer_head *bh[DIR_CACHE_SIZE];
unsigned int num_entries;
- struct exfat_dentry entries[];
};
struct exfat_dir_entry {
@@ -231,7 +227,7 @@ struct exfat_sb_info {
unsigned int root_dir; /* root dir cluster */
unsigned int dentries_per_clu; /* num of dentries per cluster */
unsigned int vol_flag; /* volume dirty flag */
- struct buffer_head *pbr_bh; /* buffer_head of PBR sector */
+ struct buffer_head *boot_bh; /* buffer_head of BOOT sector */
unsigned int map_clu; /* allocation bitmap start cluster */
unsigned int map_sectors; /* num of allocation bitmap sectors */
@@ -451,8 +447,7 @@ int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
int entry, int order, int num_entries);
int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
int entry);
-int exfat_update_dir_chksum_with_entry_set(struct super_block *sb,
- struct exfat_entry_set_cache *es, int sync);
+void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es);
int exfat_calc_num_entries(struct exfat_uni_name *p_uniname);
int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
@@ -463,9 +458,11 @@ int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir,
struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
struct exfat_chain *p_dir, int entry, struct buffer_head **bh,
sector_t *sector);
+struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
+ int num);
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
- struct exfat_chain *p_dir, int entry, unsigned int type,
- struct exfat_dentry **file_ep);
+ struct exfat_chain *p_dir, int entry, unsigned int type);
+void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
/* inode.c */
@@ -492,8 +489,6 @@ int exfat_nls_to_utf16(struct super_block *sb,
struct exfat_uni_name *uniname, int *p_lossy);
int exfat_create_upcase_table(struct super_block *sb);
void exfat_free_upcase_table(struct exfat_sb_info *sbi);
-unsigned short exfat_high_surrogate(unicode_t u);
-unsigned short exfat_low_surrogate(unicode_t u);
/* exfat/misc.c */
void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
@@ -505,13 +500,20 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
fmt, ## args)
void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...)
__printf(3, 4) __cold;
+#define exfat_err(sb, fmt, ...) \
+ exfat_msg(sb, KERN_ERR, fmt, ##__VA_ARGS__)
+#define exfat_warn(sb, fmt, ...) \
+ exfat_msg(sb, KERN_WARNING, fmt, ##__VA_ARGS__)
+#define exfat_info(sb, fmt, ...) \
+ exfat_msg(sb, KERN_INFO, fmt, ##__VA_ARGS__)
+
void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
- u8 tz, __le16 time, __le16 date, u8 time_ms);
+ u8 tz, __le16 time, __le16 date, u8 time_cs);
void exfat_truncate_atime(struct timespec64 *ts);
void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
- u8 *tz, __le16 *time, __le16 *date, u8 *time_ms);
-unsigned short exfat_calc_chksum_2byte(void *data, int len,
- unsigned short chksum, int type);
+ u8 *tz, __le16 *time, __le16 *date, u8 *time_cs);
+u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type);
+u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type);
void exfat_update_bh(struct super_block *sb, struct buffer_head *bh, int sync);
void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
unsigned int size, unsigned char flags);
diff --git a/fs/exfat/exfat_raw.h b/fs/exfat/exfat_raw.h
index 2a841010e649..350ce59cc324 100644
--- a/fs/exfat/exfat_raw.h
+++ b/fs/exfat/exfat_raw.h
@@ -8,12 +8,15 @@
#include <linux/types.h>
-#define PBR_SIGNATURE 0xAA55
+#define BOOT_SIGNATURE 0xAA55
+#define EXBOOT_SIGNATURE 0xAA550000
+#define STR_EXFAT "EXFAT " /* size should be 8 */
#define EXFAT_MAX_FILE_LEN 255
#define VOL_CLEAN 0x0000
#define VOL_DIRTY 0x0002
+#define ERR_MEDIUM 0x0004
#define EXFAT_EOF_CLUSTER 0xFFFFFFFFu
#define EXFAT_BAD_CLUSTER 0xFFFFFFF7u
@@ -55,7 +58,7 @@
/* checksum types */
#define CS_DIR_ENTRY 0
-#define CS_PBR_SECTOR 1
+#define CS_BOOT_SECTOR 1
#define CS_DEFAULT 2
/* file attributes */
@@ -69,57 +72,35 @@
#define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
ATTR_SUBDIR | ATTR_ARCHIVE)
-#define PBR64_JUMP_BOOT_LEN 3
-#define PBR64_OEM_NAME_LEN 8
-#define PBR64_RESERVED_LEN 53
+#define BOOTSEC_JUMP_BOOT_LEN 3
+#define BOOTSEC_FS_NAME_LEN 8
+#define BOOTSEC_OLDBPB_LEN 53
#define EXFAT_FILE_NAME_LEN 15
-/* EXFAT BIOS parameter block (64 bytes) */
-struct bpb64 {
- __u8 jmp_boot[PBR64_JUMP_BOOT_LEN];
- __u8 oem_name[PBR64_OEM_NAME_LEN];
- __u8 res_zero[PBR64_RESERVED_LEN];
-} __packed;
-
-/* EXFAT EXTEND BIOS parameter block (56 bytes) */
-struct bsx64 {
- __le64 vol_offset;
- __le64 vol_length;
- __le32 fat_offset;
- __le32 fat_length;
- __le32 clu_offset;
- __le32 clu_count;
- __le32 root_cluster;
- __le32 vol_serial;
- __u8 fs_version[2];
- __le16 vol_flags;
- __u8 sect_size_bits;
- __u8 sect_per_clus_bits;
- __u8 num_fats;
- __u8 phy_drv_no;
- __u8 perc_in_use;
- __u8 reserved2[7];
-} __packed;
-
-/* EXFAT PBR[BPB+BSX] (120 bytes) */
-struct pbr64 {
- struct bpb64 bpb;
- struct bsx64 bsx;
-} __packed;
-
-/* Common PBR[Partition Boot Record] (512 bytes) */
-struct pbr {
- union {
- __u8 raw[64];
- struct bpb64 f64;
- } bpb;
- union {
- __u8 raw[56];
- struct bsx64 f64;
- } bsx;
- __u8 boot_code[390];
- __le16 signature;
+/* EXFAT: Main and Backup Boot Sector (512 bytes) */
+struct boot_sector {
+ __u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
+ __u8 fs_name[BOOTSEC_FS_NAME_LEN];
+ __u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
+ __le64 partition_offset;
+ __le64 vol_length;
+ __le32 fat_offset;
+ __le32 fat_length;
+ __le32 clu_offset;
+ __le32 clu_count;
+ __le32 root_cluster;
+ __le32 vol_serial;
+ __u8 fs_revision[2];
+ __le16 vol_flags;
+ __u8 sect_size_bits;
+ __u8 sect_per_clus_bits;
+ __u8 num_fats;
+ __u8 drv_sel;
+ __u8 percent_in_use;
+ __u8 reserved[7];
+ __u8 boot_code[390];
+ __le16 signature;
} __packed;
struct exfat_dentry {
@@ -136,8 +117,8 @@ struct exfat_dentry {
__le16 modify_date;
__le16 access_time;
__le16 access_date;
- __u8 create_time_ms;
- __u8 modify_time_ms;
+ __u8 create_time_cs;
+ __u8 modify_time_cs;
__u8 create_tz;
__u8 modify_tz;
__u8 access_tz;
diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index a855b1769a96..4e5c5c9c0f2d 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -169,9 +169,8 @@ int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain)
return 0;
/* check cluster validation */
- if (p_chain->dir < 2 && p_chain->dir >= sbi->num_clusters) {
- exfat_msg(sb, KERN_ERR, "invalid start cluster (%u)",
- p_chain->dir);
+ if (!is_valid_cluster(sbi, p_chain->dir)) {
+ exfat_err(sb, "invalid start cluster (%u)", p_chain->dir);
return -EIO;
}
@@ -305,8 +304,7 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
return 0;
release_bhs:
- exfat_msg(sb, KERN_ERR, "failed zeroed sect %llu\n",
- (unsigned long long)blknr);
+ exfat_err(sb, "failed zeroed sect %llu\n", (unsigned long long)blknr);
for (i = 0; i < n; i++)
bforget(bhs[i]);
return err;
@@ -337,9 +335,8 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
/* find new cluster */
if (hint_clu == EXFAT_EOF_CLUSTER) {
if (sbi->clu_srch_ptr < EXFAT_FIRST_CLUSTER) {
- exfat_msg(sb, KERN_ERR,
- "sbi->clu_srch_ptr is invalid (%u)\n",
- sbi->clu_srch_ptr);
+ exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)\n",
+ sbi->clu_srch_ptr);
sbi->clu_srch_ptr = EXFAT_FIRST_CLUSTER;
}
@@ -349,8 +346,8 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
}
/* check cluster validation */
- if (hint_clu < EXFAT_FIRST_CLUSTER && hint_clu >= sbi->num_clusters) {
- exfat_msg(sb, KERN_ERR, "hint_cluster is invalid (%u)\n",
+ if (!is_valid_cluster(sbi, hint_clu)) {
+ exfat_err(sb, "hint_cluster is invalid (%u)",
hint_clu);
hint_clu = EXFAT_FIRST_CLUSTER;
if (p_chain->flags == ALLOC_NO_FAT_CHAIN) {
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index c9db8eb0cfc3..fce03f318787 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -96,11 +96,9 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
unsigned int num_clusters_new, num_clusters_phys;
unsigned int last_clu = EXFAT_FREE_CLUSTER;
struct exfat_chain clu;
- struct exfat_dentry *ep, *ep2;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
- struct exfat_entry_set_cache *es = NULL;
int evict = (ei->dir.dir == DIR_DELETED) ? 1 : 0;
/* check if the given file ID is opened */
@@ -153,28 +151,31 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
/* update the directory entry */
if (!evict) {
struct timespec64 ts;
+ struct exfat_dentry *ep, *ep2;
+ struct exfat_entry_set_cache *es;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
- ES_ALL_ENTRIES, &ep);
+ ES_ALL_ENTRIES);
if (!es)
return -EIO;
- ep2 = ep + 1;
+ ep = exfat_get_dentry_cached(es, 0);
+ ep2 = exfat_get_dentry_cached(es, 1);
ts = current_time(inode);
exfat_set_entry_time(sbi, &ts,
&ep->dentry.file.modify_tz,
&ep->dentry.file.modify_time,
&ep->dentry.file.modify_date,
- &ep->dentry.file.modify_time_ms);
+ &ep->dentry.file.modify_time_cs);
ep->dentry.file.attr = cpu_to_le16(ei->attr);
/* File size should be zero if there is no cluster allocated */
if (ei->start_clu == EXFAT_EOF_CLUSTER) {
- ep->dentry.stream.valid_size = 0;
- ep->dentry.stream.size = 0;
+ ep2->dentry.stream.valid_size = 0;
+ ep2->dentry.stream.size = 0;
} else {
- ep->dentry.stream.valid_size = cpu_to_le64(new_size);
- ep->dentry.stream.size = ep->dentry.stream.valid_size;
+ ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
+ ep2->dentry.stream.size = ep->dentry.stream.valid_size;
}
if (new_size == 0) {
@@ -185,10 +186,8 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER;
}
- if (exfat_update_dir_chksum_with_entry_set(sb, es,
- inode_needs_sync(inode)))
- return -EIO;
- kfree(es);
+ exfat_update_dir_chksum_with_entry_set(es);
+ exfat_free_dentry_set(es, inode_needs_sync(inode));
}
/* cut off from the FAT chain */
diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index 785ead346543..cf9ca6c4d046 100644
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -19,7 +19,6 @@
static int __exfat_write_inode(struct inode *inode, int sync)
{
- int ret = -EIO;
unsigned long long on_disk_size;
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es = NULL;
@@ -43,11 +42,11 @@ static int __exfat_write_inode(struct inode *inode, int sync)
exfat_set_vol_flags(sb, VOL_DIRTY);
/* get the directory entry of given file or directory */
- es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry, ES_ALL_ENTRIES,
- &ep);
+ es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry, ES_ALL_ENTRIES);
if (!es)
return -EIO;
- ep2 = ep + 1;
+ ep = exfat_get_dentry_cached(es, 0);
+ ep2 = exfat_get_dentry_cached(es, 1);
ep->dentry.file.attr = cpu_to_le16(exfat_make_attr(inode));
@@ -56,12 +55,12 @@ static int __exfat_write_inode(struct inode *inode, int sync)
&ep->dentry.file.create_tz,
&ep->dentry.file.create_time,
&ep->dentry.file.create_date,
- &ep->dentry.file.create_time_ms);
+ &ep->dentry.file.create_time_cs);
exfat_set_entry_time(sbi, &inode->i_mtime,
&ep->dentry.file.modify_tz,
&ep->dentry.file.modify_time,
&ep->dentry.file.modify_date,
- &ep->dentry.file.modify_time_ms);
+ &ep->dentry.file.modify_time_cs);
exfat_set_entry_time(sbi, &inode->i_atime,
&ep->dentry.file.access_tz,
&ep->dentry.file.access_time,
@@ -77,9 +76,9 @@ static int __exfat_write_inode(struct inode *inode, int sync)
ep2->dentry.stream.valid_size = cpu_to_le64(on_disk_size);
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
- ret = exfat_update_dir_chksum_with_entry_set(sb, es, sync);
- kfree(es);
- return ret;
+ exfat_update_dir_chksum_with_entry_set(es);
+ exfat_free_dentry_set(es, sync);
+ return 0;
}
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
@@ -110,8 +109,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
int ret, modified = false;
unsigned int last_clu;
struct exfat_chain new_clu;
- struct exfat_dentry *ep;
- struct exfat_entry_set_cache *es = NULL;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
@@ -222,34 +219,28 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
num_clusters += num_to_be_allocated;
*clu = new_clu.dir;
- if (ei->dir.dir != DIR_DELETED) {
+ if (ei->dir.dir != DIR_DELETED && modified) {
+ struct exfat_dentry *ep;
+ struct exfat_entry_set_cache *es;
+
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
- ES_ALL_ENTRIES, &ep);
+ ES_ALL_ENTRIES);
if (!es)
return -EIO;
/* get stream entry */
- ep++;
+ ep = exfat_get_dentry_cached(es, 1);
/* update directory entry */
- if (modified) {
- if (ep->dentry.stream.flags != ei->flags)
- ep->dentry.stream.flags = ei->flags;
-
- if (le32_to_cpu(ep->dentry.stream.start_clu) !=
- ei->start_clu)
- ep->dentry.stream.start_clu =
- cpu_to_le32(ei->start_clu);
-
- ep->dentry.stream.valid_size =
- cpu_to_le64(i_size_read(inode));
- ep->dentry.stream.size =
- ep->dentry.stream.valid_size;
- }
-
- if (exfat_update_dir_chksum_with_entry_set(sb, es,
- inode_needs_sync(inode)))
- return -EIO;
- kfree(es);
+ ep->dentry.stream.flags = ei->flags;
+ ep->dentry.stream.start_clu =
+ cpu_to_le32(ei->start_clu);
+ ep->dentry.stream.valid_size =
+ cpu_to_le64(i_size_read(inode));
+ ep->dentry.stream.size =
+ ep->dentry.stream.valid_size;
+
+ exfat_update_dir_chksum_with_entry_set(es);
+ exfat_free_dentry_set(es, inode_needs_sync(inode));
} /* end of if != DIR_DELETED */
diff --git a/fs/exfat/misc.c b/fs/exfat/misc.c
index ebd2cbe3cbc1..17d41f3d3709 100644
--- a/fs/exfat/misc.c
+++ b/fs/exfat/misc.c
@@ -32,7 +32,7 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
- exfat_msg(sb, KERN_ERR, "error, %pV\n", &vaf);
+ exfat_err(sb, "error, %pV", &vaf);
va_end(args);
}
@@ -41,7 +41,7 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
sb->s_id);
} else if (opts->errors == EXFAT_ERRORS_RO && !sb_rdonly(sb)) {
sb->s_flags |= SB_RDONLY;
- exfat_msg(sb, KERN_ERR, "Filesystem has been set read-only");
+ exfat_err(sb, "Filesystem has been set read-only");
}
}
@@ -75,7 +75,7 @@ static void exfat_adjust_tz(struct timespec64 *ts, u8 tz_off)
/* Convert a EXFAT time/date pair to a UNIX date (seconds since 1 1 70). */
void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
- u8 tz, __le16 time, __le16 date, u8 time_ms)
+ u8 tz, __le16 time, __le16 date, u8 time_cs)
{
u16 t = le16_to_cpu(time);
u16 d = le16_to_cpu(date);
@@ -84,10 +84,10 @@ void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
t >> 11, (t >> 5) & 0x003F, (t & 0x001F) << 1);
- /* time_ms field represent 0 ~ 199(1990 ms) */
- if (time_ms) {
- ts->tv_sec += time_ms / 100;
- ts->tv_nsec = (time_ms % 100) * 10 * NSEC_PER_MSEC;
+ /* time_cs field represent 0 ~ 199cs(1990 ms) */
+ if (time_cs) {
+ ts->tv_sec += time_cs / 100;
+ ts->tv_nsec = (time_cs % 100) * 10 * NSEC_PER_MSEC;
} else
ts->tv_nsec = 0;
@@ -101,7 +101,7 @@ void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
/* Convert linear UNIX date to a EXFAT time/date pair. */
void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
- u8 *tz, __le16 *time, __le16 *date, u8 *time_ms)
+ u8 *tz, __le16 *time, __le16 *date, u8 *time_cs)
{
struct tm tm;
u16 t, d;
@@ -113,9 +113,9 @@ void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
*time = cpu_to_le16(t);
*date = cpu_to_le16(d);
- /* time_ms field represent 0 ~ 199(1990 ms) */
- if (time_ms)
- *time_ms = (tm.tm_sec & 1) * 100 +
+ /* time_cs field represent 0 ~ 199cs(1990 ms) */
+ if (time_cs)
+ *time_cs = (tm.tm_sec & 1) * 100 +
ts->tv_nsec / (10 * NSEC_PER_MSEC);
/*
@@ -136,17 +136,29 @@ void exfat_truncate_atime(struct timespec64 *ts)
ts->tv_nsec = 0;
}
-unsigned short exfat_calc_chksum_2byte(void *data, int len,
- unsigned short chksum, int type)
+u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type)
{
int i;
- unsigned char *c = (unsigned char *)data;
+ u8 *c = (u8 *)data;
for (i = 0; i < len; i++, c++) {
- if (((i == 2) || (i == 3)) && (type == CS_DIR_ENTRY))
+ if (unlikely(type == CS_DIR_ENTRY && (i == 2 || i == 3)))
continue;
- chksum = (((chksum & 1) << 15) | ((chksum & 0xFFFE) >> 1)) +
- (unsigned short)*c;
+ chksum = ((chksum << 15) | (chksum >> 1)) + *c;
+ }
+ return chksum;
+}
+
+u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type)
+{
+ int i;
+ u8 *c = (u8 *)data;
+
+ for (i = 0; i < len; i++, c++) {
+ if (unlikely(type == CS_BOOT_SECTOR &&
+ (i == 106 || i == 107 || i == 112)))
+ continue;
+ chksum = ((chksum << 31) | (chksum >> 1)) + *c;
}
return chksum;
}
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index a2659a8a68a1..5b0f35329d63 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -147,16 +147,10 @@ static int exfat_utf8_d_hash(const struct dentry *dentry, struct qstr *qstr)
return charlen;
/*
- * Convert to UTF-16: code points above U+FFFF are encoded as
- * surrogate pairs.
* exfat_toupper() works only for code points up to the U+FFFF.
*/
- if (u > 0xFFFF) {
- hash = partial_name_hash(exfat_high_surrogate(u), hash);
- hash = partial_name_hash(exfat_low_surrogate(u), hash);
- } else {
- hash = partial_name_hash(exfat_toupper(sb, u), hash);
- }
+ hash = partial_name_hash(u <= 0xFFFF ? exfat_toupper(sb, u) : u,
+ hash);
}
qstr->hash = end_name_hash(hash);
@@ -185,14 +179,9 @@ static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len,
if (u_a <= 0xFFFF && u_b <= 0xFFFF) {
if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b))
return 1;
- } else if (u_a > 0xFFFF && u_b > 0xFFFF) {
- if (exfat_low_surrogate(u_a) !=
- exfat_low_surrogate(u_b) ||
- exfat_high_surrogate(u_a) !=
- exfat_high_surrogate(u_b))
- return 1;
} else {
- return 1;
+ if (u_a != u_b)
+ return 1;
}
}
@@ -611,8 +600,6 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
int ret, dentry, num_entries, count;
struct exfat_chain cdir;
struct exfat_uni_name uni_name;
- struct exfat_dentry *ep, *ep2;
- struct exfat_entry_set_cache *es = NULL;
struct super_block *sb = dir->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(dir);
@@ -671,10 +658,14 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
info->num_subdirs = count;
} else {
- es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES, &ep);
+ struct exfat_dentry *ep, *ep2;
+ struct exfat_entry_set_cache *es;
+
+ es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES);
if (!es)
return -EIO;
- ep2 = ep + 1;
+ ep = exfat_get_dentry_cached(es, 0);
+ ep2 = exfat_get_dentry_cached(es, 1);
info->type = exfat_get_entry_type(ep);
info->attr = le16_to_cpu(ep->dentry.file.attr);
@@ -692,7 +683,7 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
exfat_fs_error(sb,
"non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)",
i_size_read(dir), ei->dir.dir, ei->entry);
- kfree(es);
+ exfat_free_dentry_set(es, false);
return -EIO;
}
@@ -700,18 +691,18 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
ep->dentry.file.create_tz,
ep->dentry.file.create_time,
ep->dentry.file.create_date,
- ep->dentry.file.create_time_ms);
+ ep->dentry.file.create_time_cs);
exfat_get_entry_time(sbi, &info->mtime,
ep->dentry.file.modify_tz,
ep->dentry.file.modify_time,
ep->dentry.file.modify_date,
- ep->dentry.file.modify_time_ms);
+ ep->dentry.file.modify_time_cs);
exfat_get_entry_time(sbi, &info->atime,
ep->dentry.file.access_tz,
ep->dentry.file.access_time,
ep->dentry.file.access_date,
0);
- kfree(es);
+ exfat_free_dentry_set(es, false);
if (info->type == TYPE_DIR) {
exfat_chain_set(&cdir, info->start_clu,
@@ -778,8 +769,8 @@ static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
if (d_unhashed(alias)) {
WARN_ON(alias->d_name.hash_len !=
dentry->d_name.hash_len);
- exfat_msg(sb, KERN_INFO,
- "rehashed a dentry(%p) in read lookup", alias);
+ exfat_info(sb, "rehashed a dentry(%p) in read lookup",
+ alias);
d_drop(dentry);
d_rehash(alias);
} else if (!S_ISDIR(i_mode)) {
@@ -824,7 +815,7 @@ static int exfat_unlink(struct inode *dir, struct dentry *dentry)
exfat_chain_dup(&cdir, &ei->dir);
entry = ei->entry;
if (ei->dir.dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR, "abnormal access to deleted dentry");
+ exfat_err(sb, "abnormal access to deleted dentry");
err = -ENOENT;
goto unlock;
}
@@ -979,7 +970,7 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
entry = ei->entry;
if (ei->dir.dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR, "abnormal access to deleted dentry");
+ exfat_err(sb, "abnormal access to deleted dentry");
err = -ENOENT;
goto unlock;
}
@@ -991,9 +982,8 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
err = exfat_check_dir_empty(sb, &clu_to_free);
if (err) {
if (err == -EIO)
- exfat_msg(sb, KERN_ERR,
- "failed to exfat_check_dir_empty : err(%d)",
- err);
+ exfat_err(sb, "failed to exfat_check_dir_empty : err(%d)",
+ err);
goto unlock;
}
@@ -1014,9 +1004,7 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
err = exfat_remove_entries(dir, &cdir, entry, 0, num_entries);
if (err) {
- exfat_msg(sb, KERN_ERR,
- "failed to exfat_remove_entries : err(%d)",
- err);
+ exfat_err(sb, "failed to exfat_remove_entries : err(%d)", err);
goto unlock;
}
ei->dir.dir = DIR_DELETED;
@@ -1245,8 +1233,7 @@ static int __exfat_rename(struct inode *old_parent_inode,
return -EINVAL;
if (ei->dir.dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR,
- "abnormal access to deleted source dentry");
+ exfat_err(sb, "abnormal access to deleted source dentry");
return -ENOENT;
}
@@ -1268,8 +1255,7 @@ static int __exfat_rename(struct inode *old_parent_inode,
new_ei = EXFAT_I(new_inode);
if (new_ei->dir.dir == DIR_DELETED) {
- exfat_msg(sb, KERN_ERR,
- "abnormal access to deleted target dentry");
+ exfat_err(sb, "abnormal access to deleted target dentry");
goto out;
}
@@ -1431,8 +1417,7 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
if (S_ISDIR(new_inode->i_mode))
drop_nlink(new_inode);
} else {
- exfat_msg(sb, KERN_WARNING,
- "abnormal access to an inode dropped");
+ exfat_warn(sb, "abnormal access to an inode dropped");
WARN_ON(new_inode->i_nlink == 0);
}
new_inode->i_ctime = EXFAT_I(new_inode)->i_crtime =
diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
index 6d1c3ae130ff..57b5a7a4d1f7 100644
--- a/fs/exfat/nls.c
+++ b/fs/exfat/nls.c
@@ -503,21 +503,17 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
unilen = utf8s_to_utf16s(p_cstring, len, UTF16_HOST_ENDIAN,
(wchar_t *)uniname, MAX_NAME_LENGTH + 2);
if (unilen < 0) {
- exfat_msg(sb, KERN_ERR,
- "failed to %s (err : %d) nls len : %d",
- __func__, unilen, len);
+ exfat_err(sb, "failed to %s (err : %d) nls len : %d",
+ __func__, unilen, len);
return unilen;
}
if (unilen > MAX_NAME_LENGTH) {
- exfat_msg(sb, KERN_ERR,
- "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d",
- __func__, len, unilen, MAX_NAME_LENGTH);
+ exfat_err(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d",
+ __func__, len, unilen, MAX_NAME_LENGTH);
return -ENAMETOOLONG;
}
- p_uniname->name_len = unilen & 0xFF;
-
for (i = 0; i < unilen; i++) {
if (*uniname < 0x0020 ||
exfat_wstrchr(bad_uni_chars, *uniname))
@@ -529,7 +525,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
*uniname = '\0';
p_uniname->name_len = unilen;
- p_uniname->name_hash = exfat_calc_chksum_2byte(upname, unilen << 1, 0,
+ p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0,
CS_DEFAULT);
if (p_lossy)
@@ -537,22 +533,9 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
return unilen;
}
-#define PLANE_SIZE 0x00010000
#define SURROGATE_MASK 0xfffff800
#define SURROGATE_PAIR 0x0000d800
#define SURROGATE_LOW 0x00000400
-#define SURROGATE_BITS 0x000003ff
-
-unsigned short exfat_high_surrogate(unicode_t u)
-{
- return ((u - PLANE_SIZE) >> 10) + SURROGATE_PAIR;
-}
-
-unsigned short exfat_low_surrogate(unicode_t u)
-{
- return ((u - PLANE_SIZE) & SURROGATE_BITS) | SURROGATE_PAIR |
- SURROGATE_LOW;
-}
static int __exfat_utf16_to_nls(struct super_block *sb,
struct exfat_uni_name *p_uniname, unsigned char *p_cstring,
@@ -638,7 +621,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
*uniname = '\0';
p_uniname->name_len = unilen;
- p_uniname->name_hash = exfat_calc_chksum_2byte(upname, unilen << 1, 0,
+ p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0,
CS_DEFAULT);
if (p_lossy)
@@ -670,7 +653,8 @@ static int exfat_load_upcase_table(struct super_block *sb,
{
struct exfat_sb_info *sbi = EXFAT_SB(sb);
unsigned int sect_size = sb->s_blocksize;
- unsigned int i, index = 0, checksum = 0;
+ unsigned int i, index = 0;
+ u32 chksum = 0;
int ret;
unsigned char skip = false;
unsigned short *upcase_table;
@@ -687,9 +671,8 @@ static int exfat_load_upcase_table(struct super_block *sb,
bh = sb_bread(sb, sector);
if (!bh) {
- exfat_msg(sb, KERN_ERR,
- "failed to read sector(0x%llx)\n",
- (unsigned long long)sector);
+ exfat_err(sb, "failed to read sector(0x%llx)\n",
+ (unsigned long long)sector);
ret = -EIO;
goto free_table;
}
@@ -697,13 +680,6 @@ static int exfat_load_upcase_table(struct super_block *sb,
for (i = 0; i < sect_size && index <= 0xFFFF; i += 2) {
unsigned short uni = get_unaligned_le16(bh->b_data + i);
- checksum = ((checksum & 1) ? 0x80000000 : 0) +
- (checksum >> 1) +
- *(((unsigned char *)bh->b_data) + i);
- checksum = ((checksum & 1) ? 0x80000000 : 0) +
- (checksum >> 1) +
- *(((unsigned char *)bh->b_data) + (i + 1));
-
if (skip) {
index += uni;
skip = false;
@@ -716,15 +692,15 @@ static int exfat_load_upcase_table(struct super_block *sb,
index++;
}
}
+ chksum = exfat_calc_chksum32(bh->b_data, i, chksum, CS_DEFAULT);
brelse(bh);
}
- if (index >= 0xFFFF && utbl_checksum == checksum)
+ if (index >= 0xFFFF && utbl_checksum == chksum)
return 0;
- exfat_msg(sb, KERN_ERR,
- "failed to load upcase table (idx : 0x%08x, chksum : 0x%08x, utbl_chksum : 0x%08x)\n",
- index, checksum, utbl_checksum);
+ exfat_err(sb, "failed to load upcase table (idx : 0x%08x, chksum : 0x%08x, utbl_chksum : 0x%08x)",
+ index, chksum, utbl_checksum);
ret = -EINVAL;
free_table:
exfat_free_upcase_table(sbi);
diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index a846ff555656..e650e65536f8 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -49,7 +49,7 @@ static void exfat_put_super(struct super_block *sb)
sync_blockdev(sb->s_bdev);
exfat_set_vol_flags(sb, VOL_CLEAN);
exfat_free_bitmap(sbi);
- brelse(sbi->pbr_bh);
+ brelse(sbi->boot_bh);
mutex_unlock(&sbi->s_lock);
call_rcu(&sbi->rcu, exfat_delayed_free);
@@ -101,8 +101,8 @@ static int exfat_statfs(struct dentry *dentry, struct kstatfs *buf)
int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flag)
{
struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct pbr64 *bpb = (struct pbr64 *)sbi->pbr_bh->b_data;
- bool sync = 0;
+ struct boot_sector *p_boot = (struct boot_sector *)sbi->boot_bh->b_data;
+ bool sync;
/* flags are not changed */
if (sbi->vol_flag == new_flag)
@@ -116,18 +116,18 @@ int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flag)
if (sb_rdonly(sb))
return 0;
- bpb->bsx.vol_flags = cpu_to_le16(new_flag);
+ p_boot->vol_flags = cpu_to_le16(new_flag);
- if (new_flag == VOL_DIRTY && !buffer_dirty(sbi->pbr_bh))
+ if (new_flag == VOL_DIRTY && !buffer_dirty(sbi->boot_bh))
sync = true;
else
sync = false;
- set_buffer_uptodate(sbi->pbr_bh);
- mark_buffer_dirty(sbi->pbr_bh);
+ set_buffer_uptodate(sbi->boot_bh);
+ mark_buffer_dirty(sbi->boot_bh);
if (sync)
- sync_dirty_buffer(sbi->pbr_bh);
+ sync_dirty_buffer(sbi->boot_bh);
return 0;
}
@@ -273,9 +273,8 @@ static int exfat_parse_param(struct fs_context *fc, struct fs_parameter *param)
break;
case Opt_charset:
exfat_free_iocharset(sbi);
- opts->iocharset = kstrdup(param->string, GFP_KERNEL);
- if (!opts->iocharset)
- return -ENOMEM;
+ opts->iocharset = param->string;
+ param->string = NULL;
break;
case Opt_errors:
opts->errors = result.uint_32;
@@ -366,151 +365,208 @@ static int exfat_read_root(struct inode *inode)
return 0;
}
-static struct pbr *exfat_read_pbr_with_logical_sector(struct super_block *sb)
+static int exfat_calibrate_blocksize(struct super_block *sb, int logical_sect)
{
struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct pbr *p_pbr = (struct pbr *) (sbi->pbr_bh)->b_data;
- unsigned short logical_sect = 0;
-
- logical_sect = 1 << p_pbr->bsx.f64.sect_size_bits;
if (!is_power_of_2(logical_sect) ||
logical_sect < 512 || logical_sect > 4096) {
- exfat_msg(sb, KERN_ERR, "bogus logical sector size %u",
- logical_sect);
- return NULL;
+ exfat_err(sb, "bogus logical sector size %u", logical_sect);
+ return -EIO;
}
if (logical_sect < sb->s_blocksize) {
- exfat_msg(sb, KERN_ERR,
- "logical sector size too small for device (logical sector size = %u)",
- logical_sect);
- return NULL;
+ exfat_err(sb, "logical sector size too small for device (logical sector size = %u)",
+ logical_sect);
+ return -EIO;
}
if (logical_sect > sb->s_blocksize) {
- brelse(sbi->pbr_bh);
- sbi->pbr_bh = NULL;
+ brelse(sbi->boot_bh);
+ sbi->boot_bh = NULL;
if (!sb_set_blocksize(sb, logical_sect)) {
- exfat_msg(sb, KERN_ERR,
- "unable to set blocksize %u", logical_sect);
- return NULL;
+ exfat_err(sb, "unable to set blocksize %u",
+ logical_sect);
+ return -EIO;
}
- sbi->pbr_bh = sb_bread(sb, 0);
- if (!sbi->pbr_bh) {
- exfat_msg(sb, KERN_ERR,
- "unable to read boot sector (logical sector size = %lu)",
- sb->s_blocksize);
- return NULL;
+ sbi->boot_bh = sb_bread(sb, 0);
+ if (!sbi->boot_bh) {
+ exfat_err(sb, "unable to read boot sector (logical sector size = %lu)",
+ sb->s_blocksize);
+ return -EIO;
}
-
- p_pbr = (struct pbr *)sbi->pbr_bh->b_data;
}
- return p_pbr;
+ return 0;
}
-/* mount the file system volume */
-static int __exfat_fill_super(struct super_block *sb)
+static int exfat_read_boot_sector(struct super_block *sb)
{
- int ret;
- struct pbr *p_pbr;
- struct pbr64 *p_bpb;
+ struct boot_sector *p_boot;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
/* set block size to read super block */
sb_min_blocksize(sb, 512);
/* read boot sector */
- sbi->pbr_bh = sb_bread(sb, 0);
- if (!sbi->pbr_bh) {
- exfat_msg(sb, KERN_ERR, "unable to read boot sector");
+ sbi->boot_bh = sb_bread(sb, 0);
+ if (!sbi->boot_bh) {
+ exfat_err(sb, "unable to read boot sector");
return -EIO;
}
+ p_boot = (struct boot_sector *)sbi->boot_bh->b_data;
- /* PRB is read */
- p_pbr = (struct pbr *)sbi->pbr_bh->b_data;
-
- /* check the validity of PBR */
- if (le16_to_cpu((p_pbr->signature)) != PBR_SIGNATURE) {
- exfat_msg(sb, KERN_ERR, "invalid boot record signature");
- ret = -EINVAL;
- goto free_bh;
+ /* check the validity of BOOT */
+ if (le16_to_cpu((p_boot->signature)) != BOOT_SIGNATURE) {
+ exfat_err(sb, "invalid boot record signature");
+ return -EINVAL;
}
-
- /* check logical sector size */
- p_pbr = exfat_read_pbr_with_logical_sector(sb);
- if (!p_pbr) {
- ret = -EIO;
- goto free_bh;
+ if (memcmp(p_boot->fs_name, STR_EXFAT, BOOTSEC_FS_NAME_LEN)) {
+ exfat_err(sb, "invalid fs_name"); /* fs_name may unprintable */
+ return -EINVAL;
}
/*
- * res_zero field must be filled with zero to prevent mounting
+ * must_be_zero field must be filled with zero to prevent mounting
* from FAT volume.
*/
- if (memchr_inv(p_pbr->bpb.f64.res_zero, 0,
- sizeof(p_pbr->bpb.f64.res_zero))) {
- ret = -EINVAL;
- goto free_bh;
- }
+ if (memchr_inv(p_boot->must_be_zero, 0, sizeof(p_boot->must_be_zero)))
+ return -EINVAL;
- p_bpb = (struct pbr64 *)p_pbr;
- if (!p_bpb->bsx.num_fats) {
- exfat_msg(sb, KERN_ERR, "bogus number of FAT structure");
- ret = -EINVAL;
- goto free_bh;
+ if (p_boot->num_fats != 1 && p_boot->num_fats != 2) {
+ exfat_err(sb, "bogus number of FAT structure");
+ return -EINVAL;
}
- sbi->sect_per_clus = 1 << p_bpb->bsx.sect_per_clus_bits;
- sbi->sect_per_clus_bits = p_bpb->bsx.sect_per_clus_bits;
- sbi->cluster_size_bits = sbi->sect_per_clus_bits + sb->s_blocksize_bits;
+ sbi->sect_per_clus = 1 << p_boot->sect_per_clus_bits;
+ sbi->sect_per_clus_bits = p_boot->sect_per_clus_bits;
+ sbi->cluster_size_bits = p_boot->sect_per_clus_bits +
+ p_boot->sect_size_bits;
sbi->cluster_size = 1 << sbi->cluster_size_bits;
- sbi->num_FAT_sectors = le32_to_cpu(p_bpb->bsx.fat_length);
- sbi->FAT1_start_sector = le32_to_cpu(p_bpb->bsx.fat_offset);
- sbi->FAT2_start_sector = p_bpb->bsx.num_fats == 1 ?
- sbi->FAT1_start_sector :
- sbi->FAT1_start_sector + sbi->num_FAT_sectors;
- sbi->data_start_sector = le32_to_cpu(p_bpb->bsx.clu_offset);
- sbi->num_sectors = le64_to_cpu(p_bpb->bsx.vol_length);
+ sbi->num_FAT_sectors = le32_to_cpu(p_boot->fat_length);
+ sbi->FAT1_start_sector = le32_to_cpu(p_boot->fat_offset);
+ sbi->FAT2_start_sector = le32_to_cpu(p_boot->fat_offset);
+ if (p_boot->num_fats == 2)
+ sbi->FAT2_start_sector += sbi->num_FAT_sectors;
+ sbi->data_start_sector = le32_to_cpu(p_boot->clu_offset);
+ sbi->num_sectors = le64_to_cpu(p_boot->vol_length);
/* because the cluster index starts with 2 */
- sbi->num_clusters = le32_to_cpu(p_bpb->bsx.clu_count) +
+ sbi->num_clusters = le32_to_cpu(p_boot->clu_count) +
EXFAT_RESERVED_CLUSTERS;
- sbi->root_dir = le32_to_cpu(p_bpb->bsx.root_cluster);
+ sbi->root_dir = le32_to_cpu(p_boot->root_cluster);
sbi->dentries_per_clu = 1 <<
(sbi->cluster_size_bits - DENTRY_SIZE_BITS);
- sbi->vol_flag = le16_to_cpu(p_bpb->bsx.vol_flags);
+ sbi->vol_flag = le16_to_cpu(p_boot->vol_flags);
sbi->clu_srch_ptr = EXFAT_FIRST_CLUSTER;
sbi->used_clusters = EXFAT_CLUSTERS_UNTRACKED;
- if (le16_to_cpu(p_bpb->bsx.vol_flags) & VOL_DIRTY) {
- sbi->vol_flag |= VOL_DIRTY;
- exfat_msg(sb, KERN_WARNING,
- "Volume was not properly unmounted. Some data may be corrupt. Please run fsck.");
+ /* check consistencies */
+ if (sbi->num_FAT_sectors << p_boot->sect_size_bits <
+ sbi->num_clusters * 4) {
+ exfat_err(sb, "bogus fat length");
+ return -EINVAL;
}
+ if (sbi->data_start_sector <
+ sbi->FAT1_start_sector + sbi->num_FAT_sectors * p_boot->num_fats) {
+ exfat_err(sb, "bogus data start sector");
+ return -EINVAL;
+ }
+ if (sbi->vol_flag & VOL_DIRTY)
+ exfat_warn(sb, "Volume was not properly unmounted. Some data may be corrupt. Please run fsck.");
+ if (sbi->vol_flag & ERR_MEDIUM)
+ exfat_warn(sb, "Medium has reported failures. Some data may be lost.");
/* exFAT file size is limited by a disk volume size */
sb->s_maxbytes = (u64)(sbi->num_clusters - EXFAT_RESERVED_CLUSTERS) <<
sbi->cluster_size_bits;
+ /* check logical sector size */
+ if (exfat_calibrate_blocksize(sb, 1 << p_boot->sect_size_bits))
+ return -EIO;
+
+ return 0;
+}
+
+static int exfat_verify_boot_region(struct super_block *sb)
+{
+ struct buffer_head *bh = NULL;
+ u32 chksum = 0;
+ __le32 *p_sig, *p_chksum;
+ int sn, i;
+
+ /* read boot sector sub-regions */
+ for (sn = 0; sn < 11; sn++) {
+ bh = sb_bread(sb, sn);
+ if (!bh)
+ return -EIO;
+
+ if (sn != 0 && sn <= 8) {
+ /* extended boot sector sub-regions */
+ p_sig = (__le32 *)&bh->b_data[sb->s_blocksize - 4];
+ if (le32_to_cpu(*p_sig) != EXBOOT_SIGNATURE)
+ exfat_warn(sb, "Invalid exboot-signature(sector = %d): 0x%08x",
+ sn, le32_to_cpu(*p_sig));
+ }
+
+ chksum = exfat_calc_chksum32(bh->b_data, sb->s_blocksize,
+ chksum, sn ? CS_DEFAULT : CS_BOOT_SECTOR);
+ brelse(bh);
+ }
+
+ /* boot checksum sub-regions */
+ bh = sb_bread(sb, sn);
+ if (!bh)
+ return -EIO;
+
+ for (i = 0; i < sb->s_blocksize; i += sizeof(u32)) {
+ p_chksum = (__le32 *)&bh->b_data[i];
+ if (le32_to_cpu(*p_chksum) != chksum) {
+ exfat_err(sb, "Invalid boot checksum (boot checksum : 0x%08x, checksum : 0x%08x)",
+ le32_to_cpu(*p_chksum), chksum);
+ brelse(bh);
+ return -EINVAL;
+ }
+ }
+ brelse(bh);
+ return 0;
+}
+
+/* mount the file system volume */
+static int __exfat_fill_super(struct super_block *sb)
+{
+ int ret;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ ret = exfat_read_boot_sector(sb);
+ if (ret) {
+ exfat_err(sb, "failed to read boot sector");
+ goto free_bh;
+ }
+
+ ret = exfat_verify_boot_region(sb);
+ if (ret) {
+ exfat_err(sb, "invalid boot region");
+ goto free_bh;
+ }
+
ret = exfat_create_upcase_table(sb);
if (ret) {
- exfat_msg(sb, KERN_ERR, "failed to load upcase table");
+ exfat_err(sb, "failed to load upcase table");
goto free_bh;
}
ret = exfat_load_bitmap(sb);
if (ret) {
- exfat_msg(sb, KERN_ERR, "failed to load alloc-bitmap");
+ exfat_err(sb, "failed to load alloc-bitmap");
goto free_upcase_table;
}
ret = exfat_count_used_clusters(sb, &sbi->used_clusters);
if (ret) {
- exfat_msg(sb, KERN_ERR, "failed to scan clusters");
+ exfat_err(sb, "failed to scan clusters");
goto free_alloc_bitmap;
}
@@ -521,7 +577,7 @@ free_alloc_bitmap:
free_upcase_table:
exfat_free_upcase_table(sbi);
free_bh:
- brelse(sbi->pbr_bh);
+ brelse(sbi->boot_bh);
return ret;
}
@@ -539,8 +595,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
struct request_queue *q = bdev_get_queue(sb->s_bdev);
if (!blk_queue_discard(q)) {
- exfat_msg(sb, KERN_WARNING,
- "mounting with \"discard\" option, but the device does not support discard");
+ exfat_warn(sb, "mounting with \"discard\" option, but the device does not support discard");
opts->discard = 0;
}
}
@@ -555,7 +610,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
err = __exfat_fill_super(sb);
if (err) {
- exfat_msg(sb, KERN_ERR, "failed to recognize exfat type");
+ exfat_err(sb, "failed to recognize exfat type");
goto check_nls_io;
}
@@ -567,8 +622,8 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
else {
sbi->nls_io = load_nls(sbi->options.iocharset);
if (!sbi->nls_io) {
- exfat_msg(sb, KERN_ERR, "IO charset %s not found",
- sbi->options.iocharset);
+ exfat_err(sb, "IO charset %s not found",
+ sbi->options.iocharset);
err = -EINVAL;
goto free_table;
}
@@ -581,7 +636,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
root_inode = new_inode(sb);
if (!root_inode) {
- exfat_msg(sb, KERN_ERR, "failed to allocate root inode.");
+ exfat_err(sb, "failed to allocate root inode");
err = -ENOMEM;
goto free_table;
}
@@ -590,7 +645,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
inode_set_iversion(root_inode, 1);
err = exfat_read_root(root_inode);
if (err) {
- exfat_msg(sb, KERN_ERR, "failed to initialize root inode.");
+ exfat_err(sb, "failed to initialize root inode");
goto put_inode;
}
@@ -599,7 +654,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
sb->s_root = d_make_root(root_inode);
if (!sb->s_root) {
- exfat_msg(sb, KERN_ERR, "failed to get the root dentry");
+ exfat_err(sb, "failed to get the root dentry");
err = -ENOMEM;
goto put_inode;
}
@@ -613,7 +668,7 @@ put_inode:
free_table:
exfat_free_upcase_table(sbi);
exfat_free_bitmap(sbi);
- brelse(sbi->pbr_bh);
+ brelse(sbi->boot_bh);
check_nls_io:
unload_nls(sbi->nls_io);
@@ -630,7 +685,12 @@ static int exfat_get_tree(struct fs_context *fc)
static void exfat_free(struct fs_context *fc)
{
- kfree(fc->s_fs_info);
+ struct exfat_sb_info *sbi = fc->s_fs_info;
+
+ if (sbi) {
+ exfat_free_iocharset(sbi);
+ kfree(sbi);
+ }
}
static const struct fs_context_operations exfat_context_ops = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 22:26:35 +0000