[PATCH 09/29] staging: lustre: dne: setdirstripe should fail if not supported

From: James Simmons
Date: Thu Oct 27 2016 - 18:12:39 EST


From: Lai Siyao <lai.siyao@xxxxxxxxx>

If MDS doesn't support striped directory, creating striped directory
from a userland utility such as 'lfs setdirstripe' should fail.

Signed-off-by: Lai Siyao <lai.siyao@xxxxxxxxx>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6661
Reviewed-on: http://review.whamcloud.com/15123
Reviewed-by: James Simmons <uja.ornl@xxxxxxxxx>
Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>
Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx>
Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx>
---
drivers/staging/lustre/lustre/llite/dir.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 929c32c..6e744a5 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -419,6 +419,10 @@ static int ll_dir_setdirstripe(struct inode *parent, struct lmv_user_md *lump,
PFID(ll_inode2fid(parent)), parent, dirname,
(int)lump->lum_stripe_offset, lump->lum_stripe_count);

+ if (lump->lum_stripe_count > 1 &&
+ !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
+ return -EINVAL;
+
if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
lustre_swab_lmv_user_md(lump);

--
1.7.1