diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 11:24:59 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 11:24:59 -0700 |
commit | ad57a1022f9e050a09812d975874b94b4fcb0f46 (patch) | |
tree | 595a44c3a75995293bff2b26c020d16dfe2d54f8 /fs/exfat | |
parent | 3beff76b54986fc3132fb62614875f116bba7701 (diff) | |
parent | fc961522ddbdf00254dd03b677627139cc1f68bc (diff) |
Merge tag 'exfat-for-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat
Pull exfat update from Namjae Jeon:
"Bug fixes:
- Fix memory leak on mount failure with iocharset= option
- Fix incorrect update of stream entry
- Fix cluster range validation error
Clean-ups:
- Remove unused code and unneeded assignment
- Rename variables in exfat structure as specification
- Reorganize boot sector analysis code
- Simplify exfat_utf8_d_hash and exfat_utf8_d_cmp()
- Optimize exfat entry cache functions
- Improve wording of EXFAT_DEFAULT_IOCHARSET config option
New Feature:
- Add boot region verification"
* tag 'exfat-for-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
exfat: Fix potential use after free in exfat_load_upcase_table()
exfat: fix range validation error in alloc and free cluster
exfat: fix incorrect update of stream entry in __exfat_truncate()
exfat: fix memory leak in exfat_parse_param()
exfat: remove unnecessary reassignment of p_uniname->name_len
exfat: standardize checksum calculation
exfat: add boot region verification
exfat: separate the boot sector analysis
exfat: redefine PBR as boot_sector
exfat: optimize dir-cache
exfat: replace 'time_ms' with 'time_cs'
exfat: remove the assignment of 0 to bool variable
exfat: Remove unused functions exfat_high_surrogate() and exfat_low_surrogate()
exfat: Simplify exfat_utf8_d_hash() for code points above U+FFFF
exfat: Improve wording of EXFAT_DEFAULT_IOCHARSET config option
exfat: Use a more common logging style
exfat: Simplify exfat_utf8_d_cmp() for code points above U+FFFF
Diffstat (limited to 'fs/exfat')
-rw-r--r-- | fs/exfat/Kconfig | 7 | ||||
-rw-r--r-- | fs/exfat/balloc.c | 8 | ||||
-rw-r--r-- | fs/exfat/dir.c | 222 | ||||
-rw-r--r-- | fs/exfat/exfat_fs.h | 48 | ||||
-rw-r--r-- | fs/exfat/exfat_raw.h | 85 | ||||
-rw-r--r-- | fs/exfat/fatent.c | 17 | ||||
-rw-r--r-- | fs/exfat/file.c | 25 | ||||
-rw-r--r-- | fs/exfat/inode.c | 57 | ||||
-rw-r--r-- | fs/exfat/misc.c | 46 | ||||
-rw-r--r-- | fs/exfat/namei.c | 63 | ||||
-rw-r--r-- | fs/exfat/nls.c | 52 | ||||
-rw-r--r-- | fs/exfat/super.c | 262 |
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; |