NFS: Display local caching state

Display the local caching state in /proc/fs/nfsfs/volumes.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index aa04da8..726fe5a 100644 (file)
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1564,7 +1564,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v)
 
        /* display header on line 1 */
        if (v == &nfs_volume_list) {
-               seq_puts(m, "NV SERVER   PORT DEV     FSID\n");
+               seq_puts(m, "NV SERVER   PORT DEV     FSID              FSC\n");
                return 0;
        }
        /* display one transport per line on subsequent lines */
@@ -1578,12 +1578,13 @@ static int nfs_volume_list_show(struct seq_file *m, void *v)
                 (unsigned long long) server->fsid.major,
                 (unsigned long long) server->fsid.minor);
 
-       seq_printf(m, "v%u %s %s %-7s %-17s\n",
+       seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
                   clp->rpc_ops->version,
                   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
                   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
                   dev,
-                  fsid);
+                  fsid,
+                  nfs_server_fscache_state(server));
 
        return 0;
 }

diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index 1ec3ebb..6e809bb 100644 (file)
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -153,6 +153,16 @@ static inline void nfs_readpage_to_fscache(struct inode *inode,
                __nfs_readpage_to_fscache(inode, page, sync);
 }
 
+/*
+ * indicate the client caching state as readable text
+ */
+static inline const char *nfs_server_fscache_state(struct nfs_server *server)
+{
+       if (server->fscache && (server->options & NFS_OPTION_FSCACHE))
+               return "yes";
+       return "no ";
+}
+
 
 #else /* CONFIG_NFS_FSCACHE */
 static inline int nfs_fscache_register(void) { return 0; }
@@ -201,5 +211,10 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx,
 static inline void nfs_readpage_to_fscache(struct inode *inode,
                                           struct page *page, int sync) {}
 
+static inline const char *nfs_server_fscache_state(struct nfs_server *server)
+{
+       return "no ";
+}
+
 #endif /* CONFIG_NFS_FSCACHE */
 #endif /* _NFS_FSCACHE_H */