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| author | Jan Kara <jack@suse.cz> | 2024-01-22 15:31:21 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2024-01-23 21:21:11 +0300 |
| commit | 6c5026c1ef5b57a8d1ddeb6f2bf0c1624d6a849f (patch) | |
| tree | 22c41faebed7ced474c72b3a83ae6570ae142f21 /fs/quota/quota_v1.c | |
| parent | c3e637c7f0c9aea051b3e49fc243ad83e19348c6 (diff) | |
| download | linux-6c5026c1ef5b57a8d1ddeb6f2bf0c1624d6a849f.tar.xz | |
quota: Set nofs allocation context when acquiring dqio_sem
dqio_sem can be acquired during inode reclaim through dquot_drop() ->
dqput() -> dquot_release() -> write_file_info() context. In some cases
(most notably through dquot_get_next_id()) it can be acquired without
holding dquot->dq_lock (which already sets nofs allocation context). So
we need to set nofs allocation context when acquiring it as well.
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota/quota_v1.c')
| -rw-r--r-- | fs/quota/quota_v1.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c index a0db3f195e95..3f3e8acc05db 100644 --- a/fs/quota/quota_v1.c +++ b/fs/quota/quota_v1.c @@ -160,9 +160,11 @@ static int v1_read_file_info(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); struct v1_disk_dqblk dqblk; + unsigned int memalloc; int ret; down_read(&dqopt->dqio_sem); + memalloc = memalloc_nofs_save(); ret = sb->s_op->quota_read(sb, type, (char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(0)); if (ret != sizeof(struct v1_disk_dqblk)) { @@ -179,6 +181,7 @@ static int v1_read_file_info(struct super_block *sb, int type) dqopt->info[type].dqi_bgrace = dqblk.dqb_btime ? dqblk.dqb_btime : MAX_DQ_TIME; out: + memalloc_nofs_restore(memalloc); up_read(&dqopt->dqio_sem); return ret; } @@ -187,9 +190,11 @@ static int v1_write_file_info(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); struct v1_disk_dqblk dqblk; + unsigned int memalloc; int ret; down_write(&dqopt->dqio_sem); + memalloc = memalloc_nofs_save(); ret = sb->s_op->quota_read(sb, type, (char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(0)); if (ret != sizeof(struct v1_disk_dqblk)) { @@ -209,6 +214,7 @@ static int v1_write_file_info(struct super_block *sb, int type) else if (ret >= 0) ret = -EIO; out: + memalloc_nofs_restore(memalloc); up_write(&dqopt->dqio_sem); return ret; } |