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-rw-r--r--fs/nfs/Makefile2
-rw-r--r--fs/nfs/client.c5
-rw-r--r--fs/nfs/fscache-index.c65
-rw-r--r--fs/nfs/fscache.c52
-rw-r--r--fs/nfs/fscache.h10
5 files changed, 133 insertions, 1 deletions
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 0e0bb6c..8451598 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -15,4 +15,4 @@ nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
callback.o callback_xdr.o callback_proc.o \
nfs4namespace.o
nfs-$(CONFIG_SYSCTL) += sysctl.o
-nfs-$(CONFIG_NFS_FSCACHE) += fscache-index.o
+nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index aba3801..aa04da8 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -45,6 +45,7 @@
#include "delegation.h"
#include "iostat.h"
#include "internal.h"
+#include "fscache.h"
#define NFSDBG_FACILITY NFSDBG_CLIENT
@@ -154,6 +155,8 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
if (!IS_ERR(cred))
clp->cl_machine_cred = cred;
+ nfs_fscache_get_client_cookie(clp);
+
return clp;
error_3:
@@ -187,6 +190,8 @@ static void nfs_free_client(struct nfs_client *clp)
nfs4_shutdown_client(clp);
+ nfs_fscache_release_client_cookie(clp);
+
/* -EIO all pending I/O */
if (!IS_ERR(clp->cl_rpcclient))
rpc_shutdown_client(clp->cl_rpcclient);
diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c
index 6d5bb5c..ff14b03 100644
--- a/fs/nfs/fscache-index.c
+++ b/fs/nfs/fscache-index.c
@@ -47,3 +47,68 @@ void nfs_fscache_unregister(void)
{
fscache_unregister_netfs(&nfs_fscache_netfs);
}
+
+/*
+ * Layout of the key for an NFS server cache object.
+ */
+struct nfs_server_key {
+ uint16_t nfsversion; /* NFS protocol version */
+ uint16_t family; /* address family */
+ uint16_t port; /* IP port */
+ union {
+ struct in_addr ipv4_addr; /* IPv4 address */
+ struct in6_addr ipv6_addr; /* IPv6 address */
+ } addr[0];
+};
+
+/*
+ * Generate a key to describe a server in the main NFS index
+ * - We return the length of the key, or 0 if we can't generate one
+ */
+static uint16_t nfs_server_get_key(const void *cookie_netfs_data,
+ void *buffer, uint16_t bufmax)
+{
+ const struct nfs_client *clp = cookie_netfs_data;
+ const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &clp->cl_addr;
+ const struct sockaddr_in *sin = (struct sockaddr_in *) &clp->cl_addr;
+ struct nfs_server_key *key = buffer;
+ uint16_t len = sizeof(struct nfs_server_key);
+
+ key->nfsversion = clp->rpc_ops->version;
+ key->family = clp->cl_addr.ss_family;
+
+ memset(key, 0, len);
+
+ switch (clp->cl_addr.ss_family) {
+ case AF_INET:
+ key->port = sin->sin_port;
+ key->addr[0].ipv4_addr = sin->sin_addr;
+ len += sizeof(key->addr[0].ipv4_addr);
+ break;
+
+ case AF_INET6:
+ key->port = sin6->sin6_port;
+ key->addr[0].ipv6_addr = sin6->sin6_addr;
+ len += sizeof(key->addr[0].ipv6_addr);
+ break;
+
+ default:
+ printk(KERN_WARNING "NFS: Unknown network family '%d'\n",
+ clp->cl_addr.ss_family);
+ len = 0;
+ break;
+ }
+
+ return len;
+}
+
+/*
+ * Define the server object for FS-Cache. This is used to describe a server
+ * object to fscache_acquire_cookie(). It is keyed by the NFS protocol and
+ * server address parameters.
+ */
+const struct fscache_cookie_def nfs_fscache_server_index_def = {
+ .name = "NFS.server",
+ .type = FSCACHE_COOKIE_TYPE_INDEX,
+ .get_key = nfs_server_get_key,
+};
diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
new file mode 100644
index 0000000..c3f056f
--- /dev/null
+++ b/fs/nfs/fscache.c
@@ -0,0 +1,52 @@
+/* NFS filesystem cache interface
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/in6.h>
+#include <linux/seq_file.h>
+
+#include "internal.h"
+#include "fscache.h"
+
+#define NFSDBG_FACILITY NFSDBG_FSCACHE
+
+/*
+ * Get the per-client index cookie for an NFS client if the appropriate mount
+ * flag was set
+ * - We always try and get an index cookie for the client, but get filehandle
+ * cookies on a per-superblock basis, depending on the mount flags
+ */
+void nfs_fscache_get_client_cookie(struct nfs_client *clp)
+{
+ /* create a cache index for looking up filehandles */
+ clp->fscache = fscache_acquire_cookie(nfs_fscache_netfs.primary_index,
+ &nfs_fscache_server_index_def,
+ clp);
+ dfprintk(FSCACHE, "NFS: get client cookie (0x%p/0x%p)\n",
+ clp, clp->fscache);
+}
+
+/*
+ * Dispose of a per-client cookie
+ */
+void nfs_fscache_release_client_cookie(struct nfs_client *clp)
+{
+ dfprintk(FSCACHE, "NFS: releasing client cookie (0x%p/0x%p)\n",
+ clp, clp->fscache);
+
+ fscache_relinquish_cookie(clp->fscache, 0);
+ clp->fscache = NULL;
+}
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index ccfcdc5..1d864be 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -23,13 +23,23 @@
* fscache-index.c
*/
extern struct fscache_netfs nfs_fscache_netfs;
+extern const struct fscache_cookie_def nfs_fscache_server_index_def;
extern int nfs_fscache_register(void);
extern void nfs_fscache_unregister(void);
+/*
+ * fscache.c
+ */
+extern void nfs_fscache_get_client_cookie(struct nfs_client *);
+extern void nfs_fscache_release_client_cookie(struct nfs_client *);
+
#else /* CONFIG_NFS_FSCACHE */
static inline int nfs_fscache_register(void) { return 0; }
static inline void nfs_fscache_unregister(void) {}
+static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {}
+static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {}
+
#endif /* CONFIG_NFS_FSCACHE */
#endif /* _NFS_FSCACHE_H */
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