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exfat: write multiple sectors at once 

Write multiple sectors at once when updating dir-entries.
Add exfat_update_bhs() for that. It wait for write completion once
instead of sector by sector.
It's only effective if sync enabled.

Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
This commit is contained in:
Tetsuhiro Kohada 2020-06-23 15:22:19 +09:00 committed by Namjae Jeon
parent 2c7f8937ef
commit 3db3c3fb84
3 changed files with 29 additions and 6 deletions
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11
fs/exfat/dir.c
View File

@ -606,13 +606,16 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
{
int i;
int i, err = 0;
for (i = 0; i < es->num_bh; i++) {
if (es->modified)
exfat_update_bh(es->bh[i], sync);
err = exfat_update_bhs(es->bh, es->num_bh, sync);
for (i = 0; i < es->num_bh; i++)
if (err)
bforget(es->bh[i]);
else
brelse(es->bh[i]);
}
kfree(es);
}

1
fs/exfat/exfat_fs.h
View File

@ -513,6 +513,7 @@ void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
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 buffer_head *bh, int sync);
int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, 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);

19
fs/exfat/misc.c
View File

@ -172,6 +172,25 @@ void exfat_update_bh(struct buffer_head *bh, int sync)
sync_dirty_buffer(bh);
}
int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync)
{
int i, err = 0;
for (i = 0; i < nr_bhs; i++) {
set_buffer_uptodate(bhs[i]);
mark_buffer_dirty(bhs[i]);
if (sync)
write_dirty_buffer(bhs[i], 0);
}
for (i = 0; i < nr_bhs && sync; i++) {
wait_on_buffer(bhs[i]);
if (!err && !buffer_uptodate(bhs[i]))
err = -EIO;
}
return err;
}
void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
unsigned int size, unsigned char flags)
{