[Devel] [PATCH] fs/fuse kio: skip iostat count for unknown req types

[Pavel Butsykin]

There are still some number of response req types:
PCS_CS_WRITE_ZERO_RESP
PCS_CS_WRITE_HOLE_RESP
PCS_CS_REPLICATEX_RESP
PCS_CS_FIEMAP_RESP
PCS_CS_MAP_PROP_RESP

It makes no sense to count statistics for such requests, so for them the stat
count will simply be skipped.

Signed-off-by: Pavel Butsykin <pbutsykin at virtuozzo.com>
---
 fs/fuse/kio/pcs/fuse_stat.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/fuse/kio/pcs/fuse_stat.c b/fs/fuse/kio/pcs/fuse_stat.c
index 06be3c75240c..31ff73d6c3dc 100644
--- a/fs/fuse/kio/pcs/fuse_stat.c
+++ b/fs/fuse/kio/pcs/fuse_stat.c
@@ -654,7 +654,6 @@ struct fuse_val_stat *req_stat_entry(struct pcs_fuse_io_stat *io, u32 type)
 		default:
 			break;
 	}
-	WARN_ON_ONCE(1);
 	return NULL;
 }
 
@@ -663,9 +662,11 @@ static void fuse_iostat_count(struct pcs_fuse_io_stat_sync *iostat,
 {
 	struct fuse_val_stat *se;
 
-	write_seqlock(&iostat->seqlock);
 	se = req_stat_entry(iostat->CURR(iostat), type);
-	BUG_ON(!se);
+	if (!se)
+		return;
+
+	write_seqlock(&iostat->seqlock);
 	fuse_val_stat_update(se, size);
 	write_sequnlock(&iostat->seqlock);
 }
-- 
2.15.1