pnfs: factor GETDEVICEINFO implementations
Add support to the common pNFS core to issue GETDEVICEINFO calls on
a device ID cache miss. The code is taken from the well debugged
file layout implementation and calls out to the layoutdriver through
a new alloc_deviceid_node method. The calling conventions for
nfs4_find_get_deviceid are changed so that all information needed to
send a GETDEVICEINFO request is passed to the common code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 2c24942..ce89ae3 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -84,6 +84,7 @@
const char *name;
struct module *owner;
unsigned flags;
+ unsigned max_deviceinfo_size;
int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
int (*clear_layoutdriver) (struct nfs_server *);
@@ -126,6 +127,9 @@
enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
void (*free_deviceid_node) (struct nfs4_deviceid_node *);
+ struct nfs4_deviceid_node * (*alloc_deviceid_node)
+ (struct nfs_server *server, struct pnfs_device *pdev,
+ gfp_t gfp_flags);
void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
struct xdr_stream *xdr,
@@ -261,11 +265,12 @@
atomic_t ref;
};
-struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
+struct nfs4_deviceid_node *
+nfs4_find_get_deviceid(struct nfs_server *server,
+ const struct nfs4_deviceid *id, struct rpc_cred *cred,
+ gfp_t gfp_mask);
void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
-void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
- const struct pnfs_layoutdriver_type *,
- const struct nfs_client *,
+void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
const struct nfs4_deviceid *);
struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);