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authorSuresh Jayaraman <sjayaraman@suse.de>2010-07-05 18:12:15 +0530
committerSteve French <sfrench@us.ibm.com>2010-08-02 12:40:34 +0000
commit488f1d2d6cc9d665c9f09e4b54f77052732e3058 (patch)
tree2e240da84cdb009b89508e0fa748bebe71e35766 /fs/cifs/cache.c
parentf579cf3cfd1e19ae5aab6929679d0c04bf1a6284 (diff)
downloadlinux-488f1d2d6cc9d665c9f09e4b54f77052732e3058.tar.bz2
cifs: define server-level cache index objects and register them
Define server-level cache index objects (as managed by TCP_ServerInfo structs) and register then with FS-Cache. Each server object is created in the CIFS top-level index object and is itself an index into which superblock-level objects are inserted. The server objects are now keyed by {IPaddress,family,port} tuple. Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cache.c')
-rw-r--r--fs/cifs/cache.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
index 1cb5ffb017f1..f46468fb6a90 100644
--- a/fs/cifs/cache.c
+++ b/fs/cifs/cache.c
@@ -19,6 +19,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fscache.h"
+#include "cifs_debug.h"
/*
* CIFS filesystem definition for FS-Cache
@@ -44,3 +45,64 @@ void cifs_fscache_unregister(void)
fscache_unregister_netfs(&cifs_fscache_netfs);
}
+/*
+ * Key layout of CIFS server cache index object
+ */
+struct cifs_server_key {
+ uint16_t family; /* address family */
+ uint16_t port; /* IP port */
+ union {
+ struct in_addr ipv4_addr;
+ struct in6_addr ipv6_addr;
+ } addr[0];
+};
+
+/*
+ * Server object keyed by {IPaddress,port,family} tuple
+ */
+static uint16_t cifs_server_get_key(const void *cookie_netfs_data,
+ void *buffer, uint16_t maxbuf)
+{
+ const struct TCP_Server_Info *server = cookie_netfs_data;
+ const struct sockaddr *sa = (struct sockaddr *) &server->addr.sockAddr;
+ struct cifs_server_key *key = buffer;
+ uint16_t key_len = sizeof(struct cifs_server_key);
+
+ memset(key, 0, key_len);
+
+ /*
+ * Should not be a problem as sin_family/sin6_family overlays
+ * sa_family field
+ */
+ switch (sa->sa_family) {
+ case AF_INET:
+ key->family = server->addr.sockAddr.sin_family;
+ key->port = server->addr.sockAddr.sin_port;
+ key->addr[0].ipv4_addr = server->addr.sockAddr.sin_addr;
+ key_len += sizeof(key->addr[0].ipv4_addr);
+ break;
+
+ case AF_INET6:
+ key->family = server->addr.sockAddr6.sin6_family;
+ key->port = server->addr.sockAddr6.sin6_port;
+ key->addr[0].ipv6_addr = server->addr.sockAddr6.sin6_addr;
+ key_len += sizeof(key->addr[0].ipv6_addr);
+ break;
+
+ default:
+ cERROR(1, "CIFS: Unknown network family '%d'", sa->sa_family);
+ key_len = 0;
+ break;
+ }
+
+ return key_len;
+}
+
+/*
+ * Server object for FS-Cache
+ */
+const struct fscache_cookie_def cifs_fscache_server_index_def = {
+ .name = "CIFS.server",
+ .type = FSCACHE_COOKIE_TYPE_INDEX,
+ .get_key = cifs_server_get_key,
+};