NFS: Relax requirements in nfs_flush_incompatible
If two processes share the same credentials and NFSv4 open stateid, then
allow them both to dirty the same page, even if their nfs_open_context
differs.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 99a2919..870e2ba 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -264,6 +264,12 @@
return desc->pg_mirror_count > 1;
}
+static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
+ const struct nfs_open_context *ctx2)
+{
+ return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state;
+}
+
/* nfs2xdr.c */
extern struct rpc_procinfo nfs_procedures[];
extern int nfs2_decode_dirent(struct xdr_stream *,
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 452a011..c3a7845 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -903,12 +903,6 @@
pgio->pg_mirrors_dynamic = NULL;
}
-static bool nfs_match_open_context(const struct nfs_open_context *ctx1,
- const struct nfs_open_context *ctx2)
-{
- return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state;
-}
-
static bool nfs_match_lock_context(const struct nfs_lock_context *l1,
const struct nfs_lock_context *l2)
{
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 0aa8d6f..2c26e04 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1130,7 +1130,8 @@
if (req == NULL)
return 0;
l_ctx = req->wb_lock_context;
- do_flush = req->wb_page != page || req->wb_context != ctx;
+ do_flush = req->wb_page != page ||
+ !nfs_match_open_context(req->wb_context, ctx);
/* for now, flush if more than 1 request in page_group */
do_flush |= req->wb_this_page != req;
if (l_ctx && flctx &&