[lustre-devel] [PATCH 23/39] lustre: llite: don't check layout info for page discard

[James Simmons]

From: Bobi Jam <bobijam at whamcloud.com>

The CIT_MISC+ignore_layout is indicating locks/pages manipulation
from the OSC layer, it does not care/access lov layout related info.

WC-bug-id: https://jira.whamcloud.com/browse/LU-14042
Lustre-commit: 5d1ffc65d5a97c ("LU-14042 llite: don't check layout info for page discard")
Signed-off-by: Bobi Jam <bobijam at whamcloud.com>
Reviewed-on: https://review.whamcloud.com/40267
Reviewed-by: Andreas Dilger <adilger at whamcloud.com>
Reviewed-by: Yingjin Qian <qian at ddn.com>
Signed-off-by: James Simmons <jsimmons at infradead.org>
---
 fs/lustre/lov/lov_io.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/fs/lustre/lov/lov_io.c b/fs/lustre/lov/lov_io.c
index 20fcde1..7f0e945 100644
--- a/fs/lustre/lov/lov_io.c
+++ b/fs/lustre/lov/lov_io.c
@@ -465,8 +465,6 @@ static int lov_io_slice_init(struct lov_io *lio, struct lov_object *obj,
 	io->ci_result = 0;
 	lio->lis_object = obj;
 
-	LASSERT(obj->lo_lsm);
-
 	switch (io->ci_type) {
 	case CIT_READ:
 	case CIT_WRITE:
@@ -555,6 +553,18 @@ static int lov_io_slice_init(struct lov_io *lio, struct lov_object *obj,
 	default:
 		LBUG();
 	}
+
+	/*
+	 * CIT_MISC + ci_ignore_layout can identify the I/O from the OSC layer,
+	 * it won't care/access lov layout related info.
+	 */
+	if (io->ci_ignore_layout && io->ci_type == CIT_MISC) {
+		result = 0;
+		goto out;
+	}
+
+	LASSERT(obj->lo_lsm);
+
 	result = lov_io_mirror_init(lio, obj, io);
 	if (result)
 		goto out;
-- 
1.8.3.1