pnfs: Add layout driver flag PNFS_LAYOUTGET_ON_OPEN
Driver can set flag to allow LAYOUTGET to be sent with OPEN.
Signed-off-by: Fred Isaman <fred.isaman@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index c75ad98..3ae038d 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -2347,6 +2347,7 @@ static struct pnfs_layoutdriver_type flexfilelayout_type = {
.id = LAYOUT_FLEX_FILES,
.name = "LAYOUT_FLEX_FILES",
.owner = THIS_MODULE,
+ .flags = PNFS_LAYOUTGET_ON_OPEN,
.set_layoutdriver = ff_layout_set_layoutdriver,
.alloc_layout_hdr = ff_layout_alloc_layout_hdr,
.free_layout_hdr = ff_layout_free_layout_hdr,
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index daf6cbf..f71a55f 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -110,6 +110,7 @@ enum layoutdriver_policy_flags {
PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
PNFS_READ_WHOLE_PAGE = 1 << 2,
+ PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
};
struct nfs4_deviceid_node;
