From 488f1d2d6cc9d665c9f09e4b54f77052732e3058 Mon Sep 17 00:00:00 2001 From: Suresh Jayaraman Date: Mon, 5 Jul 2010 18:12:15 +0530 Subject: 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 Signed-off-by: Steve French --- fs/cifs/cache.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) (limited to 'fs/cifs/cache.c') 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, +}; -- cgit v1.2.3