The patch titled
blk-cgroup: fix return code for mkdir calls
has been added to the -mm tree. Its filename is
blk-cgroup-fix-return-code-for-mkdir-calls.patch
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------------------------------------------------------
Subject: blk-cgroup: fix return code for mkdir calls
From: Ciju Rajan K <ciju@xxxxxxxxxxxxxxxxxx>
If the cgroup hierarchy for blkio control groups is deeper than two
levels, kernel should not allow the creation of further levels. mkdir
system call does not except EINVAL as a return value. This patch replaces
EINVAL with more appropriate EPERM
Signed-off-by: Ciju Rajan K <ciju@xxxxxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Divyesh Shah <dpshah@xxxxxxxxxx>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/blk-cgroup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN block/blk-cgroup.c~blk-cgroup-fix-return-code-for-mkdir-calls block/blk-cgroup.c
--- a/block/blk-cgroup.c~blk-cgroup-fix-return-code-for-mkdir-calls
+++ a/block/blk-cgroup.c
@@ -966,7 +966,7 @@ blkiocg_create(struct cgroup_subsys *sub
/* Currently we do not support hierarchy deeper than two level (0,1) */
if (parent != cgroup->top_cgroup)
- return ERR_PTR(-EINVAL);
+ return ERR_PTR(-EPERM);
blkcg = kzalloc(sizeof(*blkcg), GFP_KERNEL);
if (!blkcg)
_
Patches currently in -mm which might be from ciju@xxxxxxxxxxxxxxxxxx are
blk-cgroup-fix-return-code-for-mkdir-calls.patch
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