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117 lines
3.3 KiB
117 lines
3.3 KiB
/* |
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* fs/cifs/cache.c - CIFS filesystem cache index structure definitions |
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* |
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* Copyright (c) 2010 Novell, Inc. |
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* Authors(s): Suresh Jayaraman ([email protected]> |
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* |
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* This library is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation; either version 2.1 of the License, or |
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* (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
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* the GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "fscache.h" |
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#include "cifs_debug.h" |
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/* |
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* CIFS filesystem definition for FS-Cache |
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*/ |
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struct fscache_netfs cifs_fscache_netfs = { |
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.name = "cifs", |
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.version = 0, |
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}; |
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/* |
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* Register CIFS for caching with FS-Cache |
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*/ |
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int cifs_fscache_register(void) |
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{ |
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return fscache_register_netfs(&cifs_fscache_netfs); |
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} |
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/* |
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* Unregister CIFS for caching |
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*/ |
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void cifs_fscache_unregister(void) |
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{ |
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fscache_unregister_netfs(&cifs_fscache_netfs); |
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} |
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/* |
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* Server object for FS-Cache |
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*/ |
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const struct fscache_cookie_def cifs_fscache_server_index_def = { |
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.name = "CIFS.server", |
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.type = FSCACHE_COOKIE_TYPE_INDEX, |
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}; |
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static enum |
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fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data, |
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const void *data, |
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uint16_t datalen, |
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loff_t object_size) |
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{ |
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struct cifs_fscache_super_auxdata auxdata; |
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const struct cifs_tcon *tcon = cookie_netfs_data; |
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if (datalen != sizeof(auxdata)) |
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return FSCACHE_CHECKAUX_OBSOLETE; |
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memset(&auxdata, 0, sizeof(auxdata)); |
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auxdata.resource_id = tcon->resource_id; |
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auxdata.vol_create_time = tcon->vol_create_time; |
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auxdata.vol_serial_number = tcon->vol_serial_number; |
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if (memcmp(data, &auxdata, datalen) != 0) |
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return FSCACHE_CHECKAUX_OBSOLETE; |
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return FSCACHE_CHECKAUX_OKAY; |
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} |
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/* |
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* Superblock object for FS-Cache |
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*/ |
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const struct fscache_cookie_def cifs_fscache_super_index_def = { |
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.name = "CIFS.super", |
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.type = FSCACHE_COOKIE_TYPE_INDEX, |
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.check_aux = cifs_fscache_super_check_aux, |
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}; |
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static enum |
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fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data, |
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const void *data, |
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uint16_t datalen, |
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loff_t object_size) |
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{ |
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struct cifs_fscache_inode_auxdata auxdata; |
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struct cifsInodeInfo *cifsi = cookie_netfs_data; |
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if (datalen != sizeof(auxdata)) |
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return FSCACHE_CHECKAUX_OBSOLETE; |
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memset(&auxdata, 0, sizeof(auxdata)); |
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auxdata.eof = cifsi->server_eof; |
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auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; |
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auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; |
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auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; |
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auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; |
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if (memcmp(data, &auxdata, datalen) != 0) |
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return FSCACHE_CHECKAUX_OBSOLETE; |
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return FSCACHE_CHECKAUX_OKAY; |
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} |
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const struct fscache_cookie_def cifs_fscache_inode_object_def = { |
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.name = "CIFS.uniqueid", |
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.type = FSCACHE_COOKIE_TYPE_DATAFILE, |
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.check_aux = cifs_fscache_inode_check_aux, |
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};
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