pnfs: add set-clear layoutdriver interface
To allow layout driver to issue getdevicelist at mount time, and clean up
at umount time.
[fixup non NFS_V4_1 set_pnfs_layoutdriver definition]
[pnfs: pass mntfh down the init_pnfs path]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 7074394..bddd8b9 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -80,6 +80,9 @@
struct module *owner;
unsigned flags;
+ int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
+ int (*clear_layoutdriver) (struct nfs_server *);
+
struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
void (*free_layout_hdr) (struct pnfs_layout_hdr *);
@@ -167,7 +170,7 @@
bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *);
bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int);
-void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
+void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
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);
@@ -374,7 +377,8 @@
return false;
}
-static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
+static inline void set_pnfs_layoutdriver(struct nfs_server *s,
+ const struct nfs_fh *mntfh, u32 id);
{
}