[lustre-devel] [PATCH 06/25] lustre: lmv: getattr_name("..") under striped directory

[James Simmons]

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

For getattr_name(".."), it should return FID of the master object for
striped directories. This includes changes on both client and server:
* lmv_getattr_name() should use master object FID if it's looking up
  "..".
* mdt_raw_lookup() should check parent object is sub stripe, if so
  it needs to lookup again to get master object FID. For old client
  without above change this needs to be checked twice.

This is needed by NFS export, because ll_get_parent() find parent by
getattr_name("..").

Reenable check_fhandle_syscall and update sanityn test_102.

WC-bug-id: https://jira.whamcloud.com/browse/LU-14826
Lustre-commit: cbc62b0b829afdce ("LU-14826 mdt: getattr_name("..") under striped directory")
Signed-off-by: Lai Siyao <lai.siyao at whamcloud.com>
Reviewed-on: https://review.whamcloud.com/44168
Reviewed-by: Andreas Dilger <adilger at whamcloud.com>
Reviewed-by: James Simmons <jsimmons at infradead.org>
Signed-off-by: James Simmons <jsimmons at infradead.org>
---
 fs/lustre/lmv/lmv_obd.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/lustre/lmv/lmv_obd.c b/fs/lustre/lmv/lmv_obd.c
index 2f84028..1d9b830 100644
--- a/fs/lustre/lmv/lmv_obd.c
+++ b/fs/lustre/lmv/lmv_obd.c
@@ -1945,7 +1945,11 @@ int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
 	int rc;
 
 retry:
-	tgt = lmv_locate_tgt(lmv, op_data);
+	if (op_data->op_namelen == 2 &&
+	    op_data->op_name[0] == '.' && op_data->op_name[1] == '.')
+		tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
+	else
+		tgt = lmv_locate_tgt(lmv, op_data);
 	if (IS_ERR(tgt))
 		return PTR_ERR(tgt);
 
-- 
1.8.3.1