[lustre-devel] [PATCH 22/32] lustre: lmv: support striped LMVs

[James Simmons]

From: Lai Siyao <lai.siyao at whamcloud.com>

lmv_name_to_stripe_index() should support stripe LMV, which is used
by LFSCK to verify name hash.

WC-bug-id: https://jira.whamcloud.com/browse/LU-15868
Lustre-commit: 54a2d4662b58e2ba4 ("LU-15868 lfsck: don't crash upon dir migration failure")
Signed-off-by: Lai Siyao <lai.siyao at whamcloud.com>
Reviewed-on: https://review.whamcloud.com/47381
Reviewed-by: Andreas Dilger <adilger at whamcloud.com>
Reviewed-by: Hongchao Zhang <hongchao at whamcloud.com>
Reviewed-by: Oleg Drokin <green at whamcloud.com>
Signed-off-by: James Simmons <jsimmons at infradead.org>
---
 fs/lustre/include/lustre_lmv.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/lustre/include/lustre_lmv.h b/fs/lustre/include/lustre_lmv.h
index b1d8ed9..cd7cf9e 100644
--- a/fs/lustre/include/lustre_lmv.h
+++ b/fs/lustre/include/lustre_lmv.h
@@ -366,14 +366,16 @@ static inline u32 crush_hash(u32 a, u32 b)
 static inline int lmv_name_to_stripe_index(struct lmv_mds_md_v1 *lmv,
 					   const char *name, int namelen)
 {
-	if (lmv->lmv_magic == LMV_MAGIC_V1)
+	if (lmv->lmv_magic == LMV_MAGIC_V1 ||
+	    lmv->lmv_magic == LMV_MAGIC_STRIPE)
 		return __lmv_name_to_stripe_index(lmv->lmv_hash_type,
 						  lmv->lmv_stripe_count,
 						  lmv->lmv_migrate_hash,
 						  lmv->lmv_migrate_offset,
 						  name, namelen, true);
 
-	if (lmv->lmv_magic == cpu_to_le32(LMV_MAGIC_V1))
+	if (lmv->lmv_magic == cpu_to_le32(LMV_MAGIC_V1) ||
+	    lmv->lmv_magic == cpu_to_le32(LMV_MAGIC_STRIPE))
 		return __lmv_name_to_stripe_index(
 					le32_to_cpu(lmv->lmv_hash_type),
 					le32_to_cpu(lmv->lmv_stripe_count),
-- 
1.8.3.1