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Subject[PATCH 052/124] staging: lustre: lmv: add testing for bad name hash
Date
From: Fan Yong <fan.yong@intel.com>

Enable testing of the lfsck recovery feature in the
client code for the case when name hash for some
entry becomes corrupt.

Signed-off-by: Fan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5519
Reviewed-on: http://review.whamcloud.com/11846
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
.../staging/lustre/lustre/include/obd_support.h | 1 +
drivers/staging/lustre/lustre/lmv/lmv_obd.c | 10 +++++++---
2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h
index d4c41d0..3144cca 100644
--- a/drivers/staging/lustre/lustre/include/obd_support.h
+++ b/drivers/staging/lustre/lustre/include/obd_support.h
@@ -479,6 +479,7 @@ extern char obd_jobid_var[];
#define OBD_FAIL_LFSCK_NO_AUTO 0x160b
#define OBD_FAIL_LFSCK_NO_DOUBLESCAN 0x160c
#define OBD_FAIL_LFSCK_INVALID_PFID 0x1619
+#define OBD_FAIL_LFSCK_BAD_NAME_HASH 0x1628

/* UPDATE */
#define OBD_FAIL_UPDATE_OBJ_NET 0x1700
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index d9f8003..fde71c9 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -1575,9 +1575,13 @@ lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
const struct lmv_oinfo *oinfo;
struct lmv_tgt_desc *tgt;

- oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
- if (IS_ERR(oinfo))
- return ERR_CAST(oinfo);
+ if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
+ oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
+ } else {
+ oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
+ if (IS_ERR(oinfo))
+ return ERR_CAST(oinfo);
+ }

*fid = oinfo->lmo_fid;
*mds = oinfo->lmo_mds;
--
1.7.1
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