| /* |
| * fs/cifs/cache.c - CIFS filesystem cache index structure definitions |
| * |
| * Copyright (c) 2010 Novell, Inc. |
| * Authors(s): Suresh Jayaraman (sjayaraman@suse.de> |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * 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 |
| */ |
| struct fscache_netfs cifs_fscache_netfs = { |
| .name = "cifs", |
| .version = 0, |
| }; |
| |
| /* |
| * Register CIFS for caching with FS-Cache |
| */ |
| int cifs_fscache_register(void) |
| { |
| return fscache_register_netfs(&cifs_fscache_netfs); |
| } |
| |
| /* |
| * Unregister CIFS for caching |
| */ |
| 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, |
| }; |