]>
Commit | Line | Data |
---|---|---|
488f1d2d SJ |
1 | /* |
2 | * fs/cifs/fscache.c - CIFS filesystem cache interface | |
3 | * | |
4 | * Copyright (c) 2010 Novell, Inc. | |
5 | * Author(s): Suresh Jayaraman (sjayaraman@suse.de> | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include "fscache.h" | |
22 | #include "cifsglob.h" | |
23 | #include "cifs_debug.h" | |
9451a9a5 | 24 | #include "cifs_fs_sb.h" |
488f1d2d SJ |
25 | |
26 | void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) | |
27 | { | |
28 | server->fscache = | |
29 | fscache_acquire_cookie(cifs_fscache_netfs.primary_index, | |
30 | &cifs_fscache_server_index_def, server); | |
31 | cFYI(1, "CIFS: get client cookie (0x%p/0x%p)", server, | |
32 | server->fscache); | |
33 | } | |
34 | ||
35 | void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) | |
36 | { | |
37 | cFYI(1, "CIFS: release client cookie (0x%p/0x%p)", server, | |
38 | server->fscache); | |
39 | fscache_relinquish_cookie(server->fscache, 0); | |
40 | server->fscache = NULL; | |
41 | } | |
42 | ||
d03382ce SJ |
43 | void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) |
44 | { | |
45 | struct TCP_Server_Info *server = tcon->ses->server; | |
46 | ||
47 | tcon->fscache = | |
48 | fscache_acquire_cookie(server->fscache, | |
49 | &cifs_fscache_super_index_def, tcon); | |
50 | cFYI(1, "CIFS: get superblock cookie (0x%p/0x%p)", | |
51 | server->fscache, tcon->fscache); | |
52 | } | |
53 | ||
54 | void cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) | |
55 | { | |
56 | cFYI(1, "CIFS: releasing superblock cookie (0x%p)", tcon->fscache); | |
57 | fscache_relinquish_cookie(tcon->fscache, 0); | |
58 | tcon->fscache = NULL; | |
59 | } | |
9451a9a5 SJ |
60 | |
61 | static void cifs_fscache_enable_inode_cookie(struct inode *inode) | |
62 | { | |
63 | struct cifsInodeInfo *cifsi = CIFS_I(inode); | |
64 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
65 | ||
66 | if (cifsi->fscache) | |
67 | return; | |
68 | ||
69 | cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache, | |
70 | &cifs_fscache_inode_object_def, | |
71 | cifsi); | |
72 | cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)", | |
73 | cifs_sb->tcon->fscache, cifsi->fscache); | |
74 | } | |
75 | ||
76 | void cifs_fscache_release_inode_cookie(struct inode *inode) | |
77 | { | |
78 | struct cifsInodeInfo *cifsi = CIFS_I(inode); | |
79 | ||
80 | if (cifsi->fscache) { | |
81 | cFYI(1, "CIFS releasing inode cookie (0x%p)", | |
82 | cifsi->fscache); | |
83 | fscache_relinquish_cookie(cifsi->fscache, 0); | |
84 | cifsi->fscache = NULL; | |
85 | } | |
86 | } | |
87 | ||
88 | static void cifs_fscache_disable_inode_cookie(struct inode *inode) | |
89 | { | |
90 | struct cifsInodeInfo *cifsi = CIFS_I(inode); | |
91 | ||
92 | if (cifsi->fscache) { | |
93 | cFYI(1, "CIFS disabling inode cookie (0x%p)", | |
94 | cifsi->fscache); | |
95 | fscache_relinquish_cookie(cifsi->fscache, 1); | |
96 | cifsi->fscache = NULL; | |
97 | } | |
98 | } | |
99 | ||
100 | void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) | |
101 | { | |
102 | if ((filp->f_flags & O_ACCMODE) != O_RDONLY) | |
103 | cifs_fscache_disable_inode_cookie(inode); | |
104 | else { | |
105 | cifs_fscache_enable_inode_cookie(inode); | |
106 | cFYI(1, "CIFS: fscache inode cookie set"); | |
107 | } | |
108 | } | |
109 | ||
110 | void cifs_fscache_reset_inode_cookie(struct inode *inode) | |
111 | { | |
112 | struct cifsInodeInfo *cifsi = CIFS_I(inode); | |
113 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
114 | struct fscache_cookie *old = cifsi->fscache; | |
115 | ||
116 | if (cifsi->fscache) { | |
117 | /* retire the current fscache cache and get a new one */ | |
118 | fscache_relinquish_cookie(cifsi->fscache, 1); | |
119 | ||
120 | cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache, | |
121 | &cifs_fscache_inode_object_def, | |
122 | cifsi); | |
123 | cFYI(1, "CIFS: new cookie 0x%p oldcookie 0x%p", | |
124 | cifsi->fscache, old); | |
125 | } | |
126 | } |