Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
2b280fab | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
fec11dd9 | 38 | #include <linux/namei.h> |
3eb9a889 | 39 | #include <net/ipv6.h> |
1da177e4 LT |
40 | #include "cifsfs.h" |
41 | #include "cifspdu.h" | |
42 | #define DECLARE_GLOBALS_HERE | |
43 | #include "cifsglob.h" | |
44 | #include "cifsproto.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "cifs_fs_sb.h" | |
47 | #include <linux/mm.h> | |
84a15b93 | 48 | #include <linux/key-type.h> |
e545937a | 49 | #include "cifs_spnego.h" |
f579cf3c | 50 | #include "fscache.h" |
3792c173 PS |
51 | #ifdef CONFIG_CIFS_SMB2 |
52 | #include "smb2pdu.h" | |
53 | #endif | |
1da177e4 | 54 | |
1da177e4 LT |
55 | int cifsFYI = 0; |
56 | int cifsERROR = 1; | |
57 | int traceSMB = 0; | |
e7504734 | 58 | bool enable_oplocks = true; |
1da177e4 LT |
59 | unsigned int linuxExtEnabled = 1; |
60 | unsigned int lookupCacheEnabled = 1; | |
04912d6a | 61 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 62 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 63 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 64 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
65 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
66 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
67 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
68 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
69 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
70 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
71 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
72 | "1 to 64"); | |
1da177e4 LT |
73 | unsigned int cifs_min_small = 30; |
74 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
75 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
76 | "Range: 2 to 256"); | |
1da177e4 | 77 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
fef33df8 | 78 | module_param(cifs_max_pending, int, 0444); |
63135e08 | 79 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
10b9b98e | 80 | "Default: 32767 Range: 2 to 32767."); |
e7504734 SF |
81 | module_param(enable_oplocks, bool, 0644); |
82 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:" | |
83 | "y/Y/1"); | |
84 | ||
1da177e4 LT |
85 | extern mempool_t *cifs_sm_req_poolp; |
86 | extern mempool_t *cifs_req_poolp; | |
87 | extern mempool_t *cifs_mid_poolp; | |
88 | ||
da472fc8 JL |
89 | struct workqueue_struct *cifsiod_wq; |
90 | ||
1da177e4 | 91 | static int |
97d1152a | 92 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
93 | { |
94 | struct inode *inode; | |
b2e5cd33 | 95 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 96 | int rc = 0; |
50c2f753 | 97 | |
b2e5cd33 | 98 | cifs_sb = CIFS_SB(sb); |
1da177e4 | 99 | |
2c6292ae AV |
100 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
101 | sb->s_flags |= MS_POSIXACL; | |
102 | ||
103 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) | |
104 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
105 | else | |
106 | sb->s_maxbytes = MAX_NON_LFS; | |
107 | ||
108 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
109 | sb->s_time_gran = 100; | |
110 | ||
1da177e4 LT |
111 | sb->s_magic = CIFS_MAGIC_NUMBER; |
112 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 113 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
114 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
115 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 116 | inode = cifs_root_iget(sb); |
1da177e4 | 117 | |
ce634ab2 DH |
118 | if (IS_ERR(inode)) { |
119 | rc = PTR_ERR(inode); | |
1da177e4 LT |
120 | goto out_no_root; |
121 | } | |
122 | ||
48fde701 | 123 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
124 | if (!sb->s_root) { |
125 | rc = -ENOMEM; | |
126 | goto out_no_root; | |
127 | } | |
50c2f753 | 128 | |
ea4b5740 | 129 | /* do that *after* d_make_root() - we want NULL ->d_op for root here */ |
1c929cfe AV |
130 | if (cifs_sb_master_tcon(cifs_sb)->nocase) |
131 | sb->s_d_op = &cifs_ci_dentry_ops; | |
132 | else | |
133 | sb->s_d_op = &cifs_dentry_ops; | |
134 | ||
f3a6a60e | 135 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
7521a3c5 | 136 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 137 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
138 | sb->s_export_op = &cifs_export_ops; |
139 | } | |
f3a6a60e | 140 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
1da177e4 LT |
141 | |
142 | return 0; | |
143 | ||
144 | out_no_root: | |
b6b38f70 | 145 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
146 | return rc; |
147 | } | |
148 | ||
6d686175 AV |
149 | static void cifs_kill_sb(struct super_block *sb) |
150 | { | |
151 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
152 | kill_anon_super(sb); | |
98ab494d | 153 | cifs_umount(cifs_sb); |
1da177e4 LT |
154 | } |
155 | ||
156 | static int | |
726c3342 | 157 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 158 | { |
726c3342 | 159 | struct super_block *sb = dentry->d_sb; |
39da9847 | 160 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 161 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
76ec5e33 | 162 | struct TCP_Server_Info *server = tcon->ses->server; |
6d5786a3 | 163 | unsigned int xid; |
76ec5e33 | 164 | int rc = 0; |
1da177e4 | 165 | |
6d5786a3 | 166 | xid = get_xid(); |
1da177e4 | 167 | |
39da9847 SF |
168 | /* |
169 | * PATH_MAX may be too long - it would presumably be total path, | |
170 | * but note that some servers (includinng Samba 3) have a shorter | |
171 | * maximum path. | |
172 | * | |
173 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
174 | */ | |
175 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
176 | buf->f_files = 0; /* undefined */ |
177 | buf->f_ffree = 0; /* unlimited */ | |
178 | ||
76ec5e33 PS |
179 | if (server->ops->queryfs) |
180 | rc = server->ops->queryfs(xid, tcon, buf); | |
39da9847 | 181 | |
6d5786a3 | 182 | free_xid(xid); |
39da9847 | 183 | return 0; |
1da177e4 LT |
184 | } |
185 | ||
10556cb2 | 186 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
187 | { |
188 | struct cifs_sb_info *cifs_sb; | |
189 | ||
190 | cifs_sb = CIFS_SB(inode->i_sb); | |
191 | ||
f696a365 MS |
192 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
193 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
194 | return -EACCES; | |
195 | else | |
196 | return 0; | |
197 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 198 | on the client (above and beyond ACL on servers) for |
1da177e4 | 199 | servers which do not support setting and viewing mode bits, |
50c2f753 | 200 | so allowing client to check permissions is useful */ |
2830ba7f | 201 | return generic_permission(inode, mask); |
1da177e4 LT |
202 | } |
203 | ||
e18b890b CL |
204 | static struct kmem_cache *cifs_inode_cachep; |
205 | static struct kmem_cache *cifs_req_cachep; | |
206 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 207 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
208 | mempool_t *cifs_sm_req_poolp; |
209 | mempool_t *cifs_req_poolp; | |
210 | mempool_t *cifs_mid_poolp; | |
211 | ||
212 | static struct inode * | |
213 | cifs_alloc_inode(struct super_block *sb) | |
214 | { | |
215 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 216 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
217 | if (!cifs_inode) |
218 | return NULL; | |
219 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
220 | cifs_inode->time = 0; |
221 | /* Until the file is open and we have gotten oplock | |
222 | info back from the server, can not assume caching of | |
223 | file data or metadata */ | |
c6723628 | 224 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 225 | cifs_inode->delete_pending = false; |
df2cf170 | 226 | cifs_inode->invalid_mapping = false; |
1da177e4 | 227 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 228 | cifs_inode->server_eof = 0; |
20054bd6 JL |
229 | cifs_inode->uniqueid = 0; |
230 | cifs_inode->createtime = 0; | |
50c2f753 | 231 | |
1b2b2126 SF |
232 | /* Can not set i_flags here - they get immediately overwritten |
233 | to zero by the VFS */ | |
234 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 | 235 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
f45d3416 | 236 | INIT_LIST_HEAD(&cifs_inode->llist); |
1da177e4 LT |
237 | return &cifs_inode->vfs_inode; |
238 | } | |
239 | ||
fa0d7e3d NP |
240 | static void cifs_i_callback(struct rcu_head *head) |
241 | { | |
242 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
243 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
244 | } | |
245 | ||
1da177e4 LT |
246 | static void |
247 | cifs_destroy_inode(struct inode *inode) | |
248 | { | |
fa0d7e3d | 249 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
250 | } |
251 | ||
9451a9a5 | 252 | static void |
b57922d9 | 253 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 254 | { |
b57922d9 | 255 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 256 | clear_inode(inode); |
9451a9a5 SJ |
257 | cifs_fscache_release_inode_cookie(inode); |
258 | } | |
259 | ||
61f98ffd JL |
260 | static void |
261 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
262 | { | |
a9f1b85e PS |
263 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
264 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
265 | ||
61f98ffd JL |
266 | seq_printf(s, ",addr="); |
267 | ||
a9f1b85e | 268 | switch (server->dstaddr.ss_family) { |
61f98ffd | 269 | case AF_INET: |
a9f1b85e | 270 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
271 | break; |
272 | case AF_INET6: | |
a9f1b85e PS |
273 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
274 | if (sa6->sin6_scope_id) | |
275 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
276 | break; |
277 | default: | |
278 | seq_printf(s, "(unknown)"); | |
279 | } | |
280 | } | |
281 | ||
3e715513 JL |
282 | static void |
283 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
284 | { | |
285 | seq_printf(s, ",sec="); | |
286 | ||
287 | switch (server->secType) { | |
288 | case LANMAN: | |
289 | seq_printf(s, "lanman"); | |
290 | break; | |
291 | case NTLMv2: | |
292 | seq_printf(s, "ntlmv2"); | |
293 | break; | |
294 | case NTLM: | |
295 | seq_printf(s, "ntlm"); | |
296 | break; | |
297 | case Kerberos: | |
298 | seq_printf(s, "krb5"); | |
299 | break; | |
300 | case RawNTLMSSP: | |
301 | seq_printf(s, "ntlmssp"); | |
302 | break; | |
303 | default: | |
304 | /* shouldn't ever happen */ | |
305 | seq_printf(s, "unknown"); | |
306 | break; | |
307 | } | |
308 | ||
309 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
310 | seq_printf(s, "i"); | |
311 | } | |
312 | ||
d06b5056 JL |
313 | static void |
314 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
315 | { | |
316 | seq_printf(s, ",cache="); | |
317 | ||
318 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
319 | seq_printf(s, "strict"); | |
320 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
321 | seq_printf(s, "none"); | |
322 | else | |
323 | seq_printf(s, "loose"); | |
324 | } | |
325 | ||
1da177e4 LT |
326 | /* |
327 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
328 | * Not all settable options are displayed but most of the important | |
329 | * ones are. | |
330 | */ | |
331 | static int | |
34c80b1d | 332 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 333 | { |
34c80b1d | 334 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 335 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
336 | struct sockaddr *srcaddr; |
337 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 338 | |
23db65f5 | 339 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
3e715513 | 340 | cifs_show_security(s, tcon->ses->server); |
d06b5056 | 341 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 342 | |
8e047d09 | 343 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
344 | |
345 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
346 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
347 | else if (tcon->ses->user_name) |
348 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 349 | |
8616e0fc JL |
350 | if (tcon->ses->domainName) |
351 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
352 | ||
3eb9a889 BG |
353 | if (srcaddr->sa_family != AF_UNSPEC) { |
354 | struct sockaddr_in *saddr4; | |
355 | struct sockaddr_in6 *saddr6; | |
356 | saddr4 = (struct sockaddr_in *)srcaddr; | |
357 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
358 | if (srcaddr->sa_family == AF_INET6) | |
359 | seq_printf(s, ",srcaddr=%pI6c", | |
360 | &saddr6->sin6_addr); | |
361 | else if (srcaddr->sa_family == AF_INET) | |
362 | seq_printf(s, ",srcaddr=%pI4", | |
363 | &saddr4->sin_addr.s_addr); | |
364 | else | |
365 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
366 | (int)(srcaddr->sa_family)); | |
367 | } | |
368 | ||
28f88810 | 369 | seq_printf(s, ",uid=%u", cifs_sb->mnt_uid); |
340481a3 JL |
370 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
371 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
372 | else |
373 | seq_printf(s, ",noforceuid"); | |
340481a3 | 374 | |
28f88810 | 375 | seq_printf(s, ",gid=%u", cifs_sb->mnt_gid); |
340481a3 JL |
376 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
377 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
378 | else |
379 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 380 | |
61f98ffd | 381 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 382 | |
8616e0fc | 383 | if (!tcon->unix_ext) |
5206efd6 | 384 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
2b280fab SF |
385 | cifs_sb->mnt_file_mode, |
386 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
387 | if (tcon->seal) |
388 | seq_printf(s, ",seal"); | |
389 | if (tcon->nocase) | |
390 | seq_printf(s, ",nocase"); | |
391 | if (tcon->retry) | |
392 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
393 | if (tcon->unix_ext) |
394 | seq_printf(s, ",unix"); | |
395 | else | |
396 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
397 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
398 | seq_printf(s, ",posixpaths"); | |
399 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
400 | seq_printf(s, ",setuids"); | |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
402 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
404 | seq_printf(s, ",rwpidforward"); | |
405 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
406 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
407 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
408 | seq_printf(s, ",nouser_xattr"); | |
409 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
410 | seq_printf(s, ",mapchars"); | |
411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
412 | seq_printf(s, ",sfu"); | |
413 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
414 | seq_printf(s, ",nobrl"); | |
415 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
416 | seq_printf(s, ",cifsacl"); | |
417 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
418 | seq_printf(s, ",dynperm"); | |
34c80b1d | 419 | if (root->d_sb->s_flags & MS_POSIXACL) |
8616e0fc | 420 | seq_printf(s, ",acl"); |
736a3320 SM |
421 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
422 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
424 | seq_printf(s, ",fsc"); | |
71c424ba SF |
425 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
426 | seq_printf(s, ",nostrictsync"); | |
427 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
428 | seq_printf(s, ",noperm"); | |
3c7c87fd SP |
429 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
430 | seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid); | |
431 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) | |
432 | seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid); | |
8616e0fc | 433 | |
28f88810 SP |
434 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
435 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); | |
6d20e840 | 436 | /* convert actimeo and display it in seconds */ |
156d1790 | 437 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
8616e0fc | 438 | |
1da177e4 LT |
439 | return 0; |
440 | } | |
441 | ||
42faad99 | 442 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 443 | { |
42faad99 | 444 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 445 | struct cifs_tcon *tcon; |
68058e75 | 446 | |
4523cc30 | 447 | if (cifs_sb == NULL) |
9e2e85f8 SF |
448 | return; |
449 | ||
0d424ad0 | 450 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 451 | |
3f9bcca7 | 452 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
453 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
454 | /* we have other mounts to same share or we have | |
455 | already tried to force umount this and woken up | |
456 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 457 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
458 | return; |
459 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 460 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 461 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 462 | |
3a5ff61c | 463 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 464 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 465 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 466 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 467 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
468 | wake_up_all(&tcon->ses->server->response_q); |
469 | msleep(1); /* yield */ | |
470 | /* we have to kick the requests once more */ | |
471 | wake_up_all(&tcon->ses->server->response_q); | |
472 | msleep(1); | |
5e1253b5 | 473 | } |
68058e75 SF |
474 | |
475 | return; | |
476 | } | |
68058e75 | 477 | |
bf97d287 | 478 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 479 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
480 | { |
481 | /* BB FIXME */ | |
482 | return 0; | |
483 | } | |
484 | #endif | |
485 | ||
1da177e4 LT |
486 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
487 | { | |
488 | *flags |= MS_NODIRATIME; | |
489 | return 0; | |
490 | } | |
491 | ||
45321ac5 | 492 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
493 | { |
494 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
495 | ||
45321ac5 AV |
496 | /* no serverino => unconditional eviction */ |
497 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
498 | generic_drop_inode(inode); | |
12420ac3 JL |
499 | } |
500 | ||
ee9b6d61 | 501 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
502 | .statfs = cifs_statfs, |
503 | .alloc_inode = cifs_alloc_inode, | |
504 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 505 | .drop_inode = cifs_drop_inode, |
b57922d9 | 506 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
507 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
508 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
509 | kernel forgets to call us with the same number of releases (closes) |
510 | as opens */ | |
1da177e4 | 511 | .show_options = cifs_show_options, |
7b7abfe3 | 512 | .umount_begin = cifs_umount_begin, |
1da177e4 | 513 | .remount_fs = cifs_remount, |
bf97d287 | 514 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 515 | .show_stats = cifs_show_stats, |
bf97d287 | 516 | #endif |
1da177e4 LT |
517 | }; |
518 | ||
f87d39d9 SF |
519 | /* |
520 | * Get root dentry from superblock according to prefix path mount option. | |
521 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
522 | */ | |
523 | static struct dentry * | |
524 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
525 | { | |
fec11dd9 | 526 | struct dentry *dentry; |
f87d39d9 | 527 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
528 | char *full_path = NULL; |
529 | char *s, *p; | |
f87d39d9 SF |
530 | char sep; |
531 | ||
9224dfc2 PS |
532 | full_path = build_path_to_root(vol, cifs_sb, |
533 | cifs_sb_master_tcon(cifs_sb)); | |
f87d39d9 | 534 | if (full_path == NULL) |
9403c9c5 | 535 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
536 | |
537 | cFYI(1, "Get root dentry for %s", full_path); | |
538 | ||
f87d39d9 | 539 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 AV |
540 | dentry = dget(sb->s_root); |
541 | p = s = full_path; | |
542 | ||
543 | do { | |
544 | struct inode *dir = dentry->d_inode; | |
545 | struct dentry *child; | |
546 | ||
5b980b01 PS |
547 | if (!dir) { |
548 | dput(dentry); | |
549 | dentry = ERR_PTR(-ENOENT); | |
550 | break; | |
551 | } | |
552 | ||
fec11dd9 AV |
553 | /* skip separators */ |
554 | while (*s == sep) | |
555 | s++; | |
556 | if (!*s) | |
557 | break; | |
558 | p = s++; | |
559 | /* next separator */ | |
560 | while (*s && *s != sep) | |
561 | s++; | |
562 | ||
563 | mutex_lock(&dir->i_mutex); | |
564 | child = lookup_one_len(p, dentry, s - p); | |
565 | mutex_unlock(&dir->i_mutex); | |
566 | dput(dentry); | |
567 | dentry = child; | |
568 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 569 | kfree(full_path); |
fec11dd9 | 570 | return dentry; |
f87d39d9 SF |
571 | } |
572 | ||
ee01a14d AV |
573 | static int cifs_set_super(struct super_block *sb, void *data) |
574 | { | |
575 | struct cifs_mnt_data *mnt_data = data; | |
576 | sb->s_fs_info = mnt_data->cifs_sb; | |
577 | return set_anon_super(sb, NULL); | |
578 | } | |
579 | ||
d753ed97 AV |
580 | static struct dentry * |
581 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 582 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
583 | { |
584 | int rc; | |
db719222 | 585 | struct super_block *sb; |
724d9f1c PS |
586 | struct cifs_sb_info *cifs_sb; |
587 | struct smb_vol *volume_info; | |
25c7f41e | 588 | struct cifs_mnt_data mnt_data; |
724d9f1c | 589 | struct dentry *root; |
1da177e4 | 590 | |
b6b38f70 | 591 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 592 | |
04db79b0 JL |
593 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
594 | if (IS_ERR(volume_info)) | |
595 | return ERR_CAST(volume_info); | |
724d9f1c PS |
596 | |
597 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
598 | if (cifs_sb == NULL) { | |
599 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 600 | goto out_nls; |
724d9f1c PS |
601 | } |
602 | ||
5d3bc605 AV |
603 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
604 | if (cifs_sb->mountdata == NULL) { | |
605 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 606 | goto out_cifs_sb; |
5d3bc605 AV |
607 | } |
608 | ||
724d9f1c PS |
609 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
610 | ||
97d1152a AV |
611 | rc = cifs_mount(cifs_sb, volume_info); |
612 | if (rc) { | |
613 | if (!(flags & MS_SILENT)) | |
614 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
615 | root = ERR_PTR(rc); | |
5c4f1ad7 | 616 | goto out_mountdata; |
97d1152a AV |
617 | } |
618 | ||
25c7f41e PS |
619 | mnt_data.vol = volume_info; |
620 | mnt_data.cifs_sb = cifs_sb; | |
621 | mnt_data.flags = flags; | |
622 | ||
9249e17f DH |
623 | /* BB should we make this contingent on mount parm? */ |
624 | flags |= MS_NODIRATIME | MS_NOATIME; | |
625 | ||
626 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 627 | if (IS_ERR(sb)) { |
724d9f1c | 628 | root = ERR_CAST(sb); |
97d1152a | 629 | cifs_umount(cifs_sb); |
d757d71b | 630 | goto out; |
724d9f1c | 631 | } |
1da177e4 | 632 | |
ee01a14d | 633 | if (sb->s_root) { |
25c7f41e | 634 | cFYI(1, "Use existing superblock"); |
97d1152a | 635 | cifs_umount(cifs_sb); |
5c4f1ad7 | 636 | } else { |
5c4f1ad7 AV |
637 | rc = cifs_read_super(sb); |
638 | if (rc) { | |
639 | root = ERR_PTR(rc); | |
640 | goto out_super; | |
641 | } | |
b2e5cd33 | 642 | |
5c4f1ad7 | 643 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 644 | } |
724d9f1c | 645 | |
f87d39d9 | 646 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 647 | if (IS_ERR(root)) |
f87d39d9 | 648 | goto out_super; |
25c7f41e | 649 | |
f87d39d9 | 650 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 651 | goto out; |
724d9f1c | 652 | |
641a58d6 | 653 | out_super: |
641a58d6 | 654 | deactivate_locked_super(sb); |
641a58d6 | 655 | out: |
f9e59bcb | 656 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 657 | return root; |
5c4f1ad7 AV |
658 | |
659 | out_mountdata: | |
660 | kfree(cifs_sb->mountdata); | |
661 | out_cifs_sb: | |
662 | kfree(cifs_sb); | |
663 | out_nls: | |
664 | unload_nls(volume_info->local_nls); | |
665 | goto out; | |
1da177e4 LT |
666 | } |
667 | ||
027445c3 BP |
668 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
669 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 670 | { |
e6a00296 | 671 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 672 | ssize_t written; |
72432ffc | 673 | int rc; |
1da177e4 | 674 | |
027445c3 | 675 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
676 | |
677 | if (CIFS_I(inode)->clientCanCacheAll) | |
678 | return written; | |
679 | ||
680 | rc = filemap_fdatawrite(inode->i_mapping); | |
681 | if (rc) | |
682 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
683 | ||
1da177e4 LT |
684 | return written; |
685 | } | |
686 | ||
c32a0b68 SF |
687 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
688 | { | |
06222e49 JB |
689 | /* |
690 | * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate | |
691 | * the cached file length | |
692 | */ | |
48a5730e | 693 | if (origin != SEEK_SET && origin != SEEK_CUR) { |
6feb9891 PS |
694 | int rc; |
695 | struct inode *inode = file->f_path.dentry->d_inode; | |
696 | ||
697 | /* | |
698 | * We need to be sure that all dirty pages are written and the | |
699 | * server has the newest file length. | |
700 | */ | |
701 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
702 | inode->i_mapping->nrpages != 0) { | |
703 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
704 | if (rc) { |
705 | mapping_set_error(inode->i_mapping, rc); | |
706 | return rc; | |
707 | } | |
6feb9891 PS |
708 | } |
709 | /* | |
710 | * Some applications poll for the file length in this strange | |
711 | * way so we must seek to end on non-oplocked files by | |
712 | * setting the revalidate time to zero. | |
713 | */ | |
714 | CIFS_I(inode)->time = 0; | |
715 | ||
716 | rc = cifs_revalidate_file_attr(file); | |
717 | if (rc < 0) | |
718 | return (loff_t)rc; | |
c32a0b68 | 719 | } |
ef3d0fd2 | 720 | return generic_file_llseek(file, offset, origin); |
c32a0b68 SF |
721 | } |
722 | ||
84210e91 SF |
723 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
724 | { | |
b89f4321 AB |
725 | /* note that this is called by vfs setlease with lock_flocks held |
726 | to protect *lease from going away */ | |
84210e91 | 727 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 728 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
729 | |
730 | if (!(S_ISREG(inode->i_mode))) | |
731 | return -EINVAL; | |
732 | ||
733 | /* check if file is oplocked */ | |
734 | if (((arg == F_RDLCK) && | |
735 | (CIFS_I(inode)->clientCanCacheRead)) || | |
736 | ((arg == F_WRLCK) && | |
737 | (CIFS_I(inode)->clientCanCacheAll))) | |
738 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
739 | else if (tlink_tcon(cfile->tlink)->local_lease && |
740 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
741 | /* If the server claims to support oplock on this |
742 | file, then we still need to check oplock even | |
743 | if the local_lease mount option is set, but there | |
744 | are servers which do not support oplock for which | |
745 | this mount option may be useful if the user | |
746 | knows that the file won't be changed on the server | |
747 | by anyone else */ | |
748 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 749 | else |
84210e91 SF |
750 | return -EAGAIN; |
751 | } | |
84210e91 | 752 | |
e6ab1582 | 753 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
754 | .owner = THIS_MODULE, |
755 | .name = "cifs", | |
d753ed97 | 756 | .mount = cifs_do_mount, |
6d686175 | 757 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
758 | /* .fs_flags */ |
759 | }; | |
754661f1 | 760 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 761 | .create = cifs_create, |
d2c12719 | 762 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
763 | .lookup = cifs_lookup, |
764 | .getattr = cifs_getattr, | |
765 | .unlink = cifs_unlink, | |
766 | .link = cifs_hardlink, | |
767 | .mkdir = cifs_mkdir, | |
768 | .rmdir = cifs_rmdir, | |
769 | .rename = cifs_rename, | |
770 | .permission = cifs_permission, | |
771 | /* revalidate:cifs_revalidate, */ | |
772 | .setattr = cifs_setattr, | |
773 | .symlink = cifs_symlink, | |
774 | .mknod = cifs_mknod, | |
775 | #ifdef CONFIG_CIFS_XATTR | |
776 | .setxattr = cifs_setxattr, | |
777 | .getxattr = cifs_getxattr, | |
778 | .listxattr = cifs_listxattr, | |
779 | .removexattr = cifs_removexattr, | |
780 | #endif | |
781 | }; | |
782 | ||
754661f1 | 783 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
784 | /* revalidate:cifs_revalidate, */ |
785 | .setattr = cifs_setattr, | |
786 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
787 | .rename = cifs_rename, | |
788 | .permission = cifs_permission, | |
789 | #ifdef CONFIG_CIFS_XATTR | |
790 | .setxattr = cifs_setxattr, | |
791 | .getxattr = cifs_getxattr, | |
792 | .listxattr = cifs_listxattr, | |
793 | .removexattr = cifs_removexattr, | |
50c2f753 | 794 | #endif |
1da177e4 LT |
795 | }; |
796 | ||
754661f1 | 797 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 798 | .readlink = generic_readlink, |
1da177e4 LT |
799 | .follow_link = cifs_follow_link, |
800 | .put_link = cifs_put_link, | |
801 | .permission = cifs_permission, | |
802 | /* BB add the following two eventually */ | |
803 | /* revalidate: cifs_revalidate, | |
804 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
805 | #ifdef CONFIG_CIFS_XATTR | |
806 | .setxattr = cifs_setxattr, | |
807 | .getxattr = cifs_getxattr, | |
808 | .listxattr = cifs_listxattr, | |
809 | .removexattr = cifs_removexattr, | |
50c2f753 | 810 | #endif |
1da177e4 LT |
811 | }; |
812 | ||
4b6f5d20 | 813 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
814 | .read = do_sync_read, |
815 | .write = do_sync_write, | |
87c89dd7 SF |
816 | .aio_read = generic_file_aio_read, |
817 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
818 | .open = cifs_open, |
819 | .release = cifs_close, | |
820 | .lock = cifs_lock, | |
821 | .fsync = cifs_fsync, | |
822 | .flush = cifs_flush, | |
823 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 824 | .splice_read = generic_file_splice_read, |
c32a0b68 | 825 | .llseek = cifs_llseek, |
c67593a0 | 826 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 827 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 828 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 829 | .setlease = cifs_setlease, |
1da177e4 LT |
830 | }; |
831 | ||
8be7e6ba PS |
832 | const struct file_operations cifs_file_strict_ops = { |
833 | .read = do_sync_read, | |
834 | .write = do_sync_write, | |
a70307ee | 835 | .aio_read = cifs_strict_readv, |
72432ffc | 836 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
837 | .open = cifs_open, |
838 | .release = cifs_close, | |
839 | .lock = cifs_lock, | |
840 | .fsync = cifs_strict_fsync, | |
841 | .flush = cifs_flush, | |
7a6a19b1 | 842 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
843 | .splice_read = generic_file_splice_read, |
844 | .llseek = cifs_llseek, | |
845 | #ifdef CONFIG_CIFS_POSIX | |
846 | .unlocked_ioctl = cifs_ioctl, | |
847 | #endif /* CONFIG_CIFS_POSIX */ | |
848 | .setlease = cifs_setlease, | |
849 | }; | |
850 | ||
4b6f5d20 | 851 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
852 | /* BB reevaluate whether they can be done with directio, no cache */ |
853 | .read = do_sync_read, | |
854 | .write = do_sync_write, | |
855 | .aio_read = cifs_user_readv, | |
856 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
857 | .open = cifs_open, |
858 | .release = cifs_close, | |
859 | .lock = cifs_lock, | |
860 | .fsync = cifs_fsync, | |
861 | .flush = cifs_flush, | |
a994b8fa | 862 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 863 | .splice_read = generic_file_splice_read, |
c67593a0 | 864 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 865 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 866 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 867 | .llseek = cifs_llseek, |
84210e91 | 868 | .setlease = cifs_setlease, |
1da177e4 | 869 | }; |
8be7e6ba | 870 | |
4b6f5d20 | 871 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
872 | .read = do_sync_read, |
873 | .write = do_sync_write, | |
87c89dd7 SF |
874 | .aio_read = generic_file_aio_read, |
875 | .aio_write = cifs_file_aio_write, | |
876 | .open = cifs_open, | |
877 | .release = cifs_close, | |
878 | .fsync = cifs_fsync, | |
879 | .flush = cifs_flush, | |
880 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 881 | .splice_read = generic_file_splice_read, |
c32a0b68 | 882 | .llseek = cifs_llseek, |
8b94bcb9 | 883 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 884 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 885 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 886 | .setlease = cifs_setlease, |
8b94bcb9 SF |
887 | }; |
888 | ||
8be7e6ba PS |
889 | const struct file_operations cifs_file_strict_nobrl_ops = { |
890 | .read = do_sync_read, | |
891 | .write = do_sync_write, | |
a70307ee | 892 | .aio_read = cifs_strict_readv, |
72432ffc | 893 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
894 | .open = cifs_open, |
895 | .release = cifs_close, | |
896 | .fsync = cifs_strict_fsync, | |
897 | .flush = cifs_flush, | |
7a6a19b1 | 898 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
899 | .splice_read = generic_file_splice_read, |
900 | .llseek = cifs_llseek, | |
901 | #ifdef CONFIG_CIFS_POSIX | |
902 | .unlocked_ioctl = cifs_ioctl, | |
903 | #endif /* CONFIG_CIFS_POSIX */ | |
904 | .setlease = cifs_setlease, | |
905 | }; | |
906 | ||
4b6f5d20 | 907 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
908 | /* BB reevaluate whether they can be done with directio, no cache */ |
909 | .read = do_sync_read, | |
910 | .write = do_sync_write, | |
911 | .aio_read = cifs_user_readv, | |
912 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
913 | .open = cifs_open, |
914 | .release = cifs_close, | |
915 | .fsync = cifs_fsync, | |
916 | .flush = cifs_flush, | |
810627a0 | 917 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 918 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 919 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 920 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 921 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 922 | .llseek = cifs_llseek, |
84210e91 | 923 | .setlease = cifs_setlease, |
8b94bcb9 | 924 | }; |
1da177e4 | 925 | |
4b6f5d20 | 926 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
927 | .readdir = cifs_readdir, |
928 | .release = cifs_closedir, | |
929 | .read = generic_read_dir, | |
f9ddcca4 | 930 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 931 | .llseek = generic_file_llseek, |
1da177e4 LT |
932 | }; |
933 | ||
934 | static void | |
51cc5068 | 935 | cifs_init_once(void *inode) |
1da177e4 LT |
936 | { |
937 | struct cifsInodeInfo *cifsi = inode; | |
938 | ||
a35afb83 | 939 | inode_init_once(&cifsi->vfs_inode); |
1b4b55a1 | 940 | init_rwsem(&cifsi->lock_sem); |
1da177e4 LT |
941 | } |
942 | ||
943 | static int | |
944 | cifs_init_inodecache(void) | |
945 | { | |
946 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 947 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
948 | 0, (SLAB_RECLAIM_ACCOUNT| |
949 | SLAB_MEM_SPREAD), | |
20c2df83 | 950 | cifs_init_once); |
1da177e4 LT |
951 | if (cifs_inode_cachep == NULL) |
952 | return -ENOMEM; | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | static void | |
958 | cifs_destroy_inodecache(void) | |
959 | { | |
1a1d92c1 | 960 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
961 | } |
962 | ||
963 | static int | |
964 | cifs_init_request_bufs(void) | |
965 | { | |
3792c173 PS |
966 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
967 | #ifdef CONFIG_CIFS_SMB2 | |
968 | /* | |
969 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
970 | * allocate some more bytes for CIFS. | |
971 | */ | |
972 | max_hdr_size = MAX_SMB2_HDR_SIZE; | |
973 | #endif | |
4523cc30 | 974 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
975 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
976 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
977 | CIFSMaxBufSize = 8192; | |
978 | } else if (CIFSMaxBufSize > 1024*127) { | |
979 | CIFSMaxBufSize = 1024 * 127; | |
980 | } else { | |
981 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
982 | } | |
b6b38f70 | 983 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 | 984 | cifs_req_cachep = kmem_cache_create("cifs_request", |
3792c173 | 985 | CIFSMaxBufSize + max_hdr_size, 0, |
20c2df83 | 986 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
987 | if (cifs_req_cachep == NULL) |
988 | return -ENOMEM; | |
989 | ||
4523cc30 | 990 | if (cifs_min_rcv < 1) |
1da177e4 LT |
991 | cifs_min_rcv = 1; |
992 | else if (cifs_min_rcv > 64) { | |
993 | cifs_min_rcv = 64; | |
b6b38f70 | 994 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
995 | } |
996 | ||
93d2341c MD |
997 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
998 | cifs_req_cachep); | |
1da177e4 | 999 | |
4523cc30 | 1000 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1001 | kmem_cache_destroy(cifs_req_cachep); |
1002 | return -ENOMEM; | |
1003 | } | |
ec637e3f | 1004 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1005 | almost all handle based requests (but not write response, nor is it |
1006 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1007 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1008 | for the case in which debug was on, but this larger size allows |
1009 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1010 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1011 | alloc of large cifs buffers even when page debugging is on */ |
1012 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1013 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1014 | NULL); |
1da177e4 LT |
1015 | if (cifs_sm_req_cachep == NULL) { |
1016 | mempool_destroy(cifs_req_poolp); | |
1017 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1018 | return -ENOMEM; |
1da177e4 LT |
1019 | } |
1020 | ||
4523cc30 | 1021 | if (cifs_min_small < 2) |
1da177e4 LT |
1022 | cifs_min_small = 2; |
1023 | else if (cifs_min_small > 256) { | |
1024 | cifs_min_small = 256; | |
b6b38f70 | 1025 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1026 | } |
1027 | ||
93d2341c MD |
1028 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1029 | cifs_sm_req_cachep); | |
1da177e4 | 1030 | |
4523cc30 | 1031 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1032 | mempool_destroy(cifs_req_poolp); |
1033 | kmem_cache_destroy(cifs_req_cachep); | |
1034 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1035 | return -ENOMEM; | |
1036 | } | |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | static void | |
1042 | cifs_destroy_request_bufs(void) | |
1043 | { | |
1044 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1045 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1046 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1047 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | static int | |
1051 | cifs_init_mids(void) | |
1052 | { | |
1053 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1054 | sizeof(struct mid_q_entry), 0, |
1055 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1056 | if (cifs_mid_cachep == NULL) |
1057 | return -ENOMEM; | |
1058 | ||
93d2341c MD |
1059 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1060 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1061 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1062 | kmem_cache_destroy(cifs_mid_cachep); |
1063 | return -ENOMEM; | |
1064 | } | |
1065 | ||
1da177e4 LT |
1066 | return 0; |
1067 | } | |
1068 | ||
1069 | static void | |
1070 | cifs_destroy_mids(void) | |
1071 | { | |
1072 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1073 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1074 | } |
1075 | ||
1da177e4 LT |
1076 | static int __init |
1077 | init_cifs(void) | |
1078 | { | |
1079 | int rc = 0; | |
1da177e4 | 1080 | cifs_proc_init(); |
e7ddee90 | 1081 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1082 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1083 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1084 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1085 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1086 | /* |
1087 | * Initialize Global counters | |
1088 | */ | |
1089 | atomic_set(&sesInfoAllocCount, 0); | |
1090 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1091 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1092 | atomic_set(&tcpSesReconnectCount, 0); |
1093 | atomic_set(&tconInfoReconnectCount, 0); | |
1094 | ||
1095 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1096 | atomic_set(&smBufAllocCount, 0); |
1097 | #ifdef CONFIG_CIFS_STATS2 | |
1098 | atomic_set(&totBufAllocCount, 0); | |
1099 | atomic_set(&totSmBufAllocCount, 0); | |
1100 | #endif /* CONFIG_CIFS_STATS2 */ | |
1101 | ||
1da177e4 LT |
1102 | atomic_set(&midCount, 0); |
1103 | GlobalCurrentXid = 0; | |
1104 | GlobalTotalActiveXid = 0; | |
1105 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1106 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1107 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1108 | spin_lock_init(&GlobalMid_Lock); |
1109 | ||
4523cc30 | 1110 | if (cifs_max_pending < 2) { |
1da177e4 | 1111 | cifs_max_pending = 2; |
b6b38f70 | 1112 | cFYI(1, "cifs_max_pending set to min of 2"); |
10b9b98e PS |
1113 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1114 | cifs_max_pending = CIFS_MAX_REQ; | |
1115 | cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ); | |
1da177e4 LT |
1116 | } |
1117 | ||
da472fc8 JL |
1118 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1119 | if (!cifsiod_wq) { | |
1120 | rc = -ENOMEM; | |
1121 | goto out_clean_proc; | |
1122 | } | |
1123 | ||
f579cf3c SJ |
1124 | rc = cifs_fscache_register(); |
1125 | if (rc) | |
da472fc8 | 1126 | goto out_destroy_wq; |
f579cf3c | 1127 | |
1da177e4 | 1128 | rc = cifs_init_inodecache(); |
45af7a0f | 1129 | if (rc) |
d3bf5221 | 1130 | goto out_unreg_fscache; |
45af7a0f SF |
1131 | |
1132 | rc = cifs_init_mids(); | |
1133 | if (rc) | |
1134 | goto out_destroy_inodecache; | |
1135 | ||
1136 | rc = cifs_init_request_bufs(); | |
1137 | if (rc) | |
1138 | goto out_destroy_mids; | |
1139 | ||
84a15b93 JL |
1140 | #ifdef CONFIG_CIFS_UPCALL |
1141 | rc = register_key_type(&cifs_spnego_key_type); | |
1142 | if (rc) | |
4d79dba0 SP |
1143 | goto out_destroy_request_bufs; |
1144 | #endif /* CONFIG_CIFS_UPCALL */ | |
1145 | ||
1146 | #ifdef CONFIG_CIFS_ACL | |
1147 | rc = init_cifs_idmap(); | |
1148 | if (rc) | |
c4aca0c0 | 1149 | goto out_register_key_type; |
4d79dba0 SP |
1150 | #endif /* CONFIG_CIFS_ACL */ |
1151 | ||
1152 | rc = register_filesystem(&cifs_fs_type); | |
1153 | if (rc) | |
c4aca0c0 | 1154 | goto out_init_cifs_idmap; |
45af7a0f | 1155 | |
45af7a0f SF |
1156 | return 0; |
1157 | ||
c4aca0c0 | 1158 | out_init_cifs_idmap: |
4d79dba0 SP |
1159 | #ifdef CONFIG_CIFS_ACL |
1160 | exit_cifs_idmap(); | |
c4aca0c0 | 1161 | out_register_key_type: |
4d79dba0 | 1162 | #endif |
84a15b93 | 1163 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1164 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1165 | out_destroy_request_bufs: |
1fc7995d | 1166 | #endif |
45af7a0f | 1167 | cifs_destroy_request_bufs(); |
d3bf5221 | 1168 | out_destroy_mids: |
45af7a0f | 1169 | cifs_destroy_mids(); |
d3bf5221 | 1170 | out_destroy_inodecache: |
45af7a0f | 1171 | cifs_destroy_inodecache(); |
d3bf5221 | 1172 | out_unreg_fscache: |
f579cf3c | 1173 | cifs_fscache_unregister(); |
da472fc8 JL |
1174 | out_destroy_wq: |
1175 | destroy_workqueue(cifsiod_wq); | |
d3bf5221 SF |
1176 | out_clean_proc: |
1177 | cifs_proc_clean(); | |
1da177e4 LT |
1178 | return rc; |
1179 | } | |
1180 | ||
1181 | static void __exit | |
1182 | exit_cifs(void) | |
1183 | { | |
b6b38f70 | 1184 | cFYI(DBG2, "exit_cifs"); |
3dd93306 | 1185 | unregister_filesystem(&cifs_fs_type); |
78d31a3a | 1186 | cifs_dfs_release_automount_timer(); |
4d79dba0 SP |
1187 | #ifdef CONFIG_CIFS_ACL |
1188 | cifs_destroy_idmaptrees(); | |
1189 | exit_cifs_idmap(); | |
1190 | #endif | |
84a15b93 JL |
1191 | #ifdef CONFIG_CIFS_UPCALL |
1192 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 | 1193 | #endif |
1da177e4 | 1194 | cifs_destroy_request_bufs(); |
3dd93306 JL |
1195 | cifs_destroy_mids(); |
1196 | cifs_destroy_inodecache(); | |
1197 | cifs_fscache_unregister(); | |
da472fc8 | 1198 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1199 | cifs_proc_clean(); |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1203 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1204 | MODULE_DESCRIPTION |
63135e08 SF |
1205 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1206 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1207 | MODULE_VERSION(CIFS_VERSION); |
1208 | module_init(init_cifs) | |
1209 | module_exit(exit_cifs) |