summaryrefslogtreecommitdiffstats
path: root/fs/nfs/pnfs.h
diff options
context:
space:
mode:
authorJeff Layton <jlayton@redhat.com>2016-09-15 14:40:49 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-09-19 13:11:13 -0400
commitca440c383a588091cae9fbce610b86a6e9d961ad (patch)
tree07fe5e65d81652746607babd8553e1316cd10a79 /fs/nfs/pnfs.h
parent496b77a5c5ce8cd36b5fb78b8811f015643a6541 (diff)
downloadlinux-ca440c383a588091cae9fbce610b86a6e9d961ad.tar.bz2
pnfs: add a new mechanism to select a layout driver according to an ordered list
Currently, the layout driver selection code always chooses the first one from the list. That's not really ideal however, as the server can send the list of layout types in any order that it likes. It's up to the client to select the best one for its needs. This patch adds an ordered list of preferred driver types and has the selection code sort the list of available layout drivers according to it. Any unrecognized layout type is sorted to the end of the list. For now, the order of preference is hardcoded, but it should be possible to make this configurable in the future. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
-rw-r--r--fs/nfs/pnfs.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index be515e6a3823..5c295512c967 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -236,7 +236,7 @@ void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg);
-void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32 *);
+void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
void unset_pnfs_layoutdriver(struct nfs_server *);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
@@ -657,7 +657,8 @@ pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
}
static inline void set_pnfs_layoutdriver(struct nfs_server *s,
- const struct nfs_fh *mntfh, u32 *ids)
+ const struct nfs_fh *mntfh,
+ struct nfs_fsinfo *fsinfo)
{
}