106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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// SPDX-License-Identifier: LGPL-2.1
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/*
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* 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 (sjayaraman@suse.de>
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*
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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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