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f2fs: declare nested quota_sem and remove unnecessary sems 

1.
f2fs_quota_sync
 -> down_read(&sbi->quota_sem)
 -> dquot_writeback_dquots
  -> f2fs_dquot_commit
   -> down_read(&sbi->quota_sem)

2.
f2fs_quota_sync
 -> down_read(&sbi->quota_sem)
  -> f2fs_write_data_pages
   -> f2fs_write_single_data_page
    -> down_write(&F2FS_I(inode)->i_sem)

f2fs_mkdir
 -> f2fs_do_add_link
   -> down_write(&F2FS_I(inode)->i_sem)
   -> f2fs_init_inode_metadata
    -> f2fs_new_node_page
     -> dquot_alloc_inode
      -> f2fs_dquot_mark_dquot_dirty
       -> down_read(&sbi->quota_sem)

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2019-12-03 17:31:00 -08:00
parent 762e4db545
commit 2c4e0c528e
1 changed files with 4 additions and 14 deletions
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18
fs/f2fs/super.c
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@ -2158,7 +2158,7 @@ static int f2fs_dquot_commit(struct dquot *dquot)
struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
int ret;
down_read(&sbi->quota_sem);
down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
ret = dquot_commit(dquot);
if (ret < 0)
set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
@ -2182,13 +2182,10 @@ static int f2fs_dquot_acquire(struct dquot *dquot)
static int f2fs_dquot_release(struct dquot *dquot)
{
struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
int ret;
int ret = dquot_release(dquot);
down_read(&sbi->quota_sem);
ret = dquot_release(dquot);
if (ret < 0)
set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
up_read(&sbi->quota_sem);
return ret;
}
@ -2196,29 +2193,22 @@ static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
{
struct super_block *sb = dquot->dq_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
int ret;
down_read(&sbi->quota_sem);
ret = dquot_mark_dquot_dirty(dquot);
int ret = dquot_mark_dquot_dirty(dquot);
/* if we are using journalled quota */
if (is_journalled_quota(sbi))
set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
up_read(&sbi->quota_sem);
return ret;
}
static int f2fs_dquot_commit_info(struct super_block *sb, int type)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
int ret;
int ret = dquot_commit_info(sb, type);
down_read(&sbi->quota_sem);
ret = dquot_commit_info(sb, type);
if (ret < 0)
set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
up_read(&sbi->quota_sem);
return ret;
}