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exfat: remove EXFAT_SB_DIRTY flag 

This flag is set/reset in exfat_put_super()/exfat_sync_fs()
to avoid sync_blockdev().
- exfat_put_super():
Before calling this, the VFS has already called sync_filesystem(),
so sync is never performed here.
- exfat_sync_fs():
After calling this, the VFS calls sync_blockdev(), so, it is meaningless
to check EXFAT_SB_DIRTY or to bypass sync_blockdev() here.

Remove the EXFAT_SB_DIRTY check to ensure synchronization.
And remove the code related to the flag.

Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
This commit is contained in:
Tetsuhiro Kohada 2020-06-16 11:18:07 +09:00 committed by Namjae Jeon
parent bcf876870b
commit 2c7f8937ef
7 changed files with 26 additions and 35 deletions
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4
fs/exfat/balloc.c
View File

@ -158,7 +158,7 @@ int exfat_set_bitmap(struct inode *inode, unsigned int clu)
b = BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent_idx);
set_bit_le(b, sbi->vol_amap[i]->b_data);
exfat_update_bh(sb, sbi->vol_amap[i], IS_DIRSYNC(inode));
exfat_update_bh(sbi->vol_amap[i], IS_DIRSYNC(inode));
return 0;
}
@ -180,7 +180,7 @@ void exfat_clear_bitmap(struct inode *inode, unsigned int clu)
b = BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent_idx);
clear_bit_le(b, sbi->vol_amap[i]->b_data);
exfat_update_bh(sb, sbi->vol_amap[i], IS_DIRSYNC(inode));
exfat_update_bh(sbi->vol_amap[i], IS_DIRSYNC(inode));
if (opts->discard) {
int ret_discard;

16
fs/exfat/dir.c
View File

@ -470,7 +470,7 @@ int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
&ep->dentry.file.access_date,
NULL);
exfat_update_bh(sb, bh, IS_DIRSYNC(inode));
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
ep = exfat_get_dentry(sb, p_dir, entry + 1, &bh, &sector);
@ -480,7 +480,7 @@ int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
exfat_init_stream_entry(ep,
(type == TYPE_FILE) ? ALLOC_FAT_CHAIN : ALLOC_NO_FAT_CHAIN,
start_clu, size);
exfat_update_bh(sb, bh, IS_DIRSYNC(inode));
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
return 0;
@ -516,7 +516,7 @@ int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
}
fep->dentry.file.checksum = cpu_to_le16(chksum);
exfat_update_bh(sb, fbh, IS_DIRSYNC(inode));
exfat_update_bh(fbh, IS_DIRSYNC(inode));
release_fbh:
brelse(fbh);
return ret;
@ -538,7 +538,7 @@ int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
return -EIO;
ep->dentry.file.num_ext = (unsigned char)(num_entries - 1);
exfat_update_bh(sb, bh, sync);
exfat_update_bh(bh, sync);
brelse(bh);
ep = exfat_get_dentry(sb, p_dir, entry + 1, &bh, &sector);
@ -547,7 +547,7 @@ int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
ep->dentry.stream.name_len = p_uniname->name_len;
ep->dentry.stream.name_hash = cpu_to_le16(p_uniname->name_hash);
exfat_update_bh(sb, bh, sync);
exfat_update_bh(bh, sync);
brelse(bh);
for (i = EXFAT_FIRST_CLUSTER; i < num_entries; i++) {
@ -556,7 +556,7 @@ int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
return -EIO;
exfat_init_name_entry(ep, uniname);
exfat_update_bh(sb, bh, sync);
exfat_update_bh(bh, sync);
brelse(bh);
uniname += EXFAT_FILE_NAME_LEN;
}
@ -580,7 +580,7 @@ int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
return -EIO;
exfat_set_entry_type(ep, TYPE_DELETED);
exfat_update_bh(sb, bh, IS_DIRSYNC(inode));
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
}
@ -610,7 +610,7 @@ void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
for (i = 0; i < es->num_bh; i++) {
if (es->modified)
exfat_update_bh(es->sb, es->bh[i], sync);
exfat_update_bh(es->bh[i], sync);
brelse(es->bh[i]);
}
kfree(es);

5
fs/exfat/exfat_fs.h
View File

@ -13,8 +13,6 @@
#define EXFAT_SUPER_MAGIC 0x2011BAB0UL
#define EXFAT_ROOT_INO 1
#define EXFAT_SB_DIRTY 0
#define EXFAT_CLUSTERS_UNTRACKED (~0u)
/*
@ -238,7 +236,6 @@ struct exfat_sb_info {
unsigned int clu_srch_ptr; /* cluster search pointer */
unsigned int used_clusters; /* number of used clusters */
unsigned long s_state;
struct mutex s_lock; /* superblock lock */
struct exfat_mount_options options;
struct nls_table *nls_io; /* Charset used for input and display */
@ -515,7 +512,7 @@ void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
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_update_bh(struct buffer_head *bh, int sync);
void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
unsigned int size, unsigned char flags);
void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec);

7
fs/exfat/fatent.c
View File

@ -75,7 +75,7 @@ int exfat_ent_set(struct super_block *sb, unsigned int loc,
fat_entry = (__le32 *)&(bh->b_data[off]);
*fat_entry = cpu_to_le32(content);
exfat_update_bh(sb, bh, sb->s_flags & SB_SYNCHRONOUS);
exfat_update_bh(bh, sb->s_flags & SB_SYNCHRONOUS);
exfat_mirror_bh(sb, sec, bh);
brelse(bh);
return 0;
@ -174,7 +174,6 @@ int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain)
return -EIO;
}
set_bit(EXFAT_SB_DIRTY, &sbi->s_state);
clu = p_chain->dir;
if (p_chain->flags == ALLOC_NO_FAT_CHAIN) {
@ -274,7 +273,7 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
goto release_bhs;
}
memset(bhs[n]->b_data, 0, sb->s_blocksize);
exfat_update_bh(sb, bhs[n], 0);
exfat_update_bh(bhs[n], 0);
n++;
blknr++;
@ -358,8 +357,6 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
}
}
set_bit(EXFAT_SB_DIRTY, &sbi->s_state);
p_chain->dir = EXFAT_EOF_CLUSTER;
while ((new_clu = exfat_find_free_bitmap(sb, hint_clu)) !=

3
fs/exfat/misc.c
View File

@ -163,9 +163,8 @@ u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type)
return chksum;
}
void exfat_update_bh(struct super_block *sb, struct buffer_head *bh, int sync)
void exfat_update_bh(struct buffer_head *bh, int sync)
{
set_bit(EXFAT_SB_DIRTY, &EXFAT_SB(sb)->s_state);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);

12
fs/exfat/namei.c
View File

@ -387,7 +387,7 @@ static int exfat_find_empty_entry(struct inode *inode,
ep->dentry.stream.valid_size = cpu_to_le64(size);
ep->dentry.stream.size = ep->dentry.stream.valid_size;
ep->dentry.stream.flags = p_dir->flags;
exfat_update_bh(sb, bh, IS_DIRSYNC(inode));
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
if (exfat_update_dir_chksum(inode, &(ei->dir),
ei->entry))
@ -1071,7 +1071,7 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
epnew->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
ei->attr |= ATTR_ARCHIVE;
}
exfat_update_bh(sb, new_bh, sync);
exfat_update_bh(new_bh, sync);
brelse(old_bh);
brelse(new_bh);
@ -1087,7 +1087,7 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
}
memcpy(epnew, epold, DENTRY_SIZE);
exfat_update_bh(sb, new_bh, sync);
exfat_update_bh(new_bh, sync);
brelse(old_bh);
brelse(new_bh);
@ -1104,7 +1104,7 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
epold->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
ei->attr |= ATTR_ARCHIVE;
}
exfat_update_bh(sb, old_bh, sync);
exfat_update_bh(old_bh, sync);
brelse(old_bh);
ret = exfat_init_ext_entry(inode, p_dir, oldentry,
num_new_entries, p_uniname);
@ -1159,7 +1159,7 @@ static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
epnew->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
ei->attr |= ATTR_ARCHIVE;
}
exfat_update_bh(sb, new_bh, IS_DIRSYNC(inode));
exfat_update_bh(new_bh, IS_DIRSYNC(inode));
brelse(mov_bh);
brelse(new_bh);
@ -1175,7 +1175,7 @@ static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
}
memcpy(epnew, epmov, DENTRY_SIZE);
exfat_update_bh(sb, new_bh, IS_DIRSYNC(inode));
exfat_update_bh(new_bh, IS_DIRSYNC(inode));
brelse(mov_bh);
brelse(new_bh);

8
fs/exfat/super.c
View File

@ -45,9 +45,6 @@ static void exfat_put_super(struct super_block *sb)
struct exfat_sb_info *sbi = EXFAT_SB(sb);
mutex_lock(&sbi->s_lock);
if (test_and_clear_bit(EXFAT_SB_DIRTY, &sbi->s_state))
sync_blockdev(sb->s_bdev);
exfat_set_vol_flags(sb, VOL_CLEAN);
exfat_free_bitmap(sbi);
brelse(sbi->boot_bh);
mutex_unlock(&sbi->s_lock);
@ -60,13 +57,14 @@ static int exfat_sync_fs(struct super_block *sb, int wait)
struct exfat_sb_info *sbi = EXFAT_SB(sb);
int err = 0;
if (!wait)
return 0;
/* If there are some dirty buffers in the bdev inode */
mutex_lock(&sbi->s_lock);
if (test_and_clear_bit(EXFAT_SB_DIRTY, &sbi->s_state)) {
sync_blockdev(sb->s_bdev);
if (exfat_set_vol_flags(sb, VOL_CLEAN))
err = -EIO;
}
mutex_unlock(&sbi->s_lock);
return err;
}