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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> |
3eb9a889 | 38 | #include <net/ipv6.h> |
1da177e4 LT |
39 | #include "cifsfs.h" |
40 | #include "cifspdu.h" | |
41 | #define DECLARE_GLOBALS_HERE | |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "cifs_fs_sb.h" | |
46 | #include <linux/mm.h> | |
84a15b93 | 47 | #include <linux/key-type.h> |
e545937a | 48 | #include "cifs_spnego.h" |
f579cf3c | 49 | #include "fscache.h" |
1da177e4 LT |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
51 | ||
1da177e4 LT |
52 | int cifsFYI = 0; |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
1da177e4 LT |
56 | unsigned int linuxExtEnabled = 1; |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
04912d6a | 59 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 60 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 61 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 62 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
63 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
64 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
65 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
66 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
68 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
69 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
70 | "1 to 64"); | |
1da177e4 LT |
71 | unsigned int cifs_min_small = 30; |
72 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
74 | "Range: 2 to 256"); | |
1da177e4 LT |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
76 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
78 | "Default: 50 Range: 2 to 256"); | |
fda35943 SF |
79 | unsigned short echo_retries = 5; |
80 | module_param(echo_retries, ushort, 0644); | |
81 | MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and " | |
82 | "reconnecting server. Default: 5. 0 means " | |
83 | "never reconnect."); | |
1da177e4 LT |
84 | extern mempool_t *cifs_sm_req_poolp; |
85 | extern mempool_t *cifs_req_poolp; | |
86 | extern mempool_t *cifs_mid_poolp; | |
87 | ||
d7c86ff8 JL |
88 | void |
89 | cifs_sb_active(struct super_block *sb) | |
90 | { | |
91 | struct cifs_sb_info *server = CIFS_SB(sb); | |
92 | ||
93 | if (atomic_inc_return(&server->active) == 1) | |
94 | atomic_inc(&sb->s_active); | |
95 | } | |
96 | ||
97 | void | |
98 | cifs_sb_deactive(struct super_block *sb) | |
99 | { | |
100 | struct cifs_sb_info *server = CIFS_SB(sb); | |
101 | ||
102 | if (atomic_dec_and_test(&server->active)) | |
103 | deactivate_super(sb); | |
104 | } | |
105 | ||
1da177e4 | 106 | static int |
97d1152a | 107 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
108 | { |
109 | struct inode *inode; | |
b2e5cd33 | 110 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 111 | int rc = 0; |
50c2f753 | 112 | |
b2e5cd33 | 113 | cifs_sb = CIFS_SB(sb); |
1da177e4 | 114 | |
2c6292ae AV |
115 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
116 | sb->s_flags |= MS_POSIXACL; | |
117 | ||
118 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) | |
119 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
120 | else | |
121 | sb->s_maxbytes = MAX_NON_LFS; | |
122 | ||
123 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
124 | sb->s_time_gran = 100; | |
125 | ||
1da177e4 LT |
126 | sb->s_magic = CIFS_MAGIC_NUMBER; |
127 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 128 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
129 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
130 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 131 | inode = cifs_root_iget(sb); |
1da177e4 | 132 | |
ce634ab2 DH |
133 | if (IS_ERR(inode)) { |
134 | rc = PTR_ERR(inode); | |
135 | inode = NULL; | |
1da177e4 LT |
136 | goto out_no_root; |
137 | } | |
138 | ||
139 | sb->s_root = d_alloc_root(inode); | |
140 | ||
141 | if (!sb->s_root) { | |
142 | rc = -ENOMEM; | |
143 | goto out_no_root; | |
144 | } | |
50c2f753 | 145 | |
1c929cfe AV |
146 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
147 | if (cifs_sb_master_tcon(cifs_sb)->nocase) | |
148 | sb->s_d_op = &cifs_ci_dentry_ops; | |
149 | else | |
150 | sb->s_d_op = &cifs_dentry_ops; | |
151 | ||
25720873 | 152 | #ifdef CIFS_NFSD_EXPORT |
7521a3c5 | 153 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 154 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
155 | sb->s_export_op = &cifs_export_ops; |
156 | } | |
25720873 | 157 | #endif /* CIFS_NFSD_EXPORT */ |
1da177e4 LT |
158 | |
159 | return 0; | |
160 | ||
161 | out_no_root: | |
b6b38f70 | 162 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
163 | if (inode) |
164 | iput(inode); | |
54b4602d | 165 | |
1da177e4 LT |
166 | return rc; |
167 | } | |
168 | ||
6d686175 AV |
169 | static void cifs_kill_sb(struct super_block *sb) |
170 | { | |
171 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
172 | kill_anon_super(sb); | |
98ab494d | 173 | cifs_umount(cifs_sb); |
1da177e4 LT |
174 | } |
175 | ||
176 | static int | |
726c3342 | 177 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 178 | { |
726c3342 | 179 | struct super_block *sb = dentry->d_sb; |
39da9847 | 180 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 181 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 182 | int rc = -EOPNOTSUPP; |
39da9847 | 183 | int xid; |
1da177e4 LT |
184 | |
185 | xid = GetXid(); | |
186 | ||
1da177e4 LT |
187 | buf->f_type = CIFS_MAGIC_NUMBER; |
188 | ||
39da9847 SF |
189 | /* |
190 | * PATH_MAX may be too long - it would presumably be total path, | |
191 | * but note that some servers (includinng Samba 3) have a shorter | |
192 | * maximum path. | |
193 | * | |
194 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
195 | */ | |
196 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
197 | buf->f_files = 0; /* undefined */ |
198 | buf->f_ffree = 0; /* unlimited */ | |
199 | ||
39da9847 SF |
200 | /* |
201 | * We could add a second check for a QFS Unix capability bit | |
202 | */ | |
203 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
204 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
205 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
206 | ||
207 | /* | |
208 | * Only need to call the old QFSInfo if failed on newer one, | |
209 | * e.g. by OS/2. | |
210 | **/ | |
211 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
212 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
213 | ||
214 | /* | |
215 | * Some old Windows servers also do not support level 103, retry with | |
216 | * older level one if old server failed the previous call or we | |
217 | * bypassed it because we detected that this was an older LANMAN sess | |
218 | */ | |
4523cc30 | 219 | if (rc) |
39da9847 SF |
220 | rc = SMBOldQFSInfo(xid, tcon, buf); |
221 | ||
1da177e4 | 222 | FreeXid(xid); |
39da9847 | 223 | return 0; |
1da177e4 LT |
224 | } |
225 | ||
b74c79e9 | 226 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
1da177e4 LT |
227 | { |
228 | struct cifs_sb_info *cifs_sb; | |
229 | ||
230 | cifs_sb = CIFS_SB(inode->i_sb); | |
231 | ||
f696a365 MS |
232 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
233 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
234 | return -EACCES; | |
235 | else | |
236 | return 0; | |
237 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 238 | on the client (above and beyond ACL on servers) for |
1da177e4 | 239 | servers which do not support setting and viewing mode bits, |
50c2f753 | 240 | so allowing client to check permissions is useful */ |
b74c79e9 | 241 | return generic_permission(inode, mask, flags, NULL); |
1da177e4 LT |
242 | } |
243 | ||
e18b890b CL |
244 | static struct kmem_cache *cifs_inode_cachep; |
245 | static struct kmem_cache *cifs_req_cachep; | |
246 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 247 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
248 | mempool_t *cifs_sm_req_poolp; |
249 | mempool_t *cifs_req_poolp; | |
250 | mempool_t *cifs_mid_poolp; | |
251 | ||
252 | static struct inode * | |
253 | cifs_alloc_inode(struct super_block *sb) | |
254 | { | |
255 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 256 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
257 | if (!cifs_inode) |
258 | return NULL; | |
259 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
260 | cifs_inode->time = 0; |
261 | /* Until the file is open and we have gotten oplock | |
262 | info back from the server, can not assume caching of | |
263 | file data or metadata */ | |
c6723628 | 264 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 265 | cifs_inode->delete_pending = false; |
df2cf170 | 266 | cifs_inode->invalid_mapping = false; |
1da177e4 | 267 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 268 | cifs_inode->server_eof = 0; |
20054bd6 JL |
269 | cifs_inode->uniqueid = 0; |
270 | cifs_inode->createtime = 0; | |
50c2f753 | 271 | |
1b2b2126 SF |
272 | /* Can not set i_flags here - they get immediately overwritten |
273 | to zero by the VFS */ | |
274 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
275 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
276 | return &cifs_inode->vfs_inode; | |
277 | } | |
278 | ||
fa0d7e3d NP |
279 | static void cifs_i_callback(struct rcu_head *head) |
280 | { | |
281 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
282 | INIT_LIST_HEAD(&inode->i_dentry); | |
283 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
284 | } | |
285 | ||
1da177e4 LT |
286 | static void |
287 | cifs_destroy_inode(struct inode *inode) | |
288 | { | |
fa0d7e3d | 289 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
290 | } |
291 | ||
9451a9a5 | 292 | static void |
b57922d9 | 293 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 294 | { |
b57922d9 AV |
295 | truncate_inode_pages(&inode->i_data, 0); |
296 | end_writeback(inode); | |
9451a9a5 SJ |
297 | cifs_fscache_release_inode_cookie(inode); |
298 | } | |
299 | ||
61f98ffd JL |
300 | static void |
301 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
302 | { | |
a9f1b85e PS |
303 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
304 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
305 | ||
61f98ffd JL |
306 | seq_printf(s, ",addr="); |
307 | ||
a9f1b85e | 308 | switch (server->dstaddr.ss_family) { |
61f98ffd | 309 | case AF_INET: |
a9f1b85e | 310 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
311 | break; |
312 | case AF_INET6: | |
a9f1b85e PS |
313 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
314 | if (sa6->sin6_scope_id) | |
315 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
316 | break; |
317 | default: | |
318 | seq_printf(s, "(unknown)"); | |
319 | } | |
320 | } | |
321 | ||
3e715513 JL |
322 | static void |
323 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
324 | { | |
325 | seq_printf(s, ",sec="); | |
326 | ||
327 | switch (server->secType) { | |
328 | case LANMAN: | |
329 | seq_printf(s, "lanman"); | |
330 | break; | |
331 | case NTLMv2: | |
332 | seq_printf(s, "ntlmv2"); | |
333 | break; | |
334 | case NTLM: | |
335 | seq_printf(s, "ntlm"); | |
336 | break; | |
337 | case Kerberos: | |
338 | seq_printf(s, "krb5"); | |
339 | break; | |
340 | case RawNTLMSSP: | |
341 | seq_printf(s, "ntlmssp"); | |
342 | break; | |
343 | default: | |
344 | /* shouldn't ever happen */ | |
345 | seq_printf(s, "unknown"); | |
346 | break; | |
347 | } | |
348 | ||
349 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
350 | seq_printf(s, "i"); | |
351 | } | |
352 | ||
1da177e4 LT |
353 | /* |
354 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
355 | * Not all settable options are displayed but most of the important | |
356 | * ones are. | |
357 | */ | |
358 | static int | |
359 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
360 | { | |
8e047d09 | 361 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
96daf2b0 | 362 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
363 | struct sockaddr *srcaddr; |
364 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 365 | |
3e715513 JL |
366 | cifs_show_security(s, tcon->ses->server); |
367 | ||
8e047d09 | 368 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
369 | |
370 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
371 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
372 | else if (tcon->ses->user_name) |
373 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 374 | |
8616e0fc JL |
375 | if (tcon->ses->domainName) |
376 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
377 | ||
3eb9a889 BG |
378 | if (srcaddr->sa_family != AF_UNSPEC) { |
379 | struct sockaddr_in *saddr4; | |
380 | struct sockaddr_in6 *saddr6; | |
381 | saddr4 = (struct sockaddr_in *)srcaddr; | |
382 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
383 | if (srcaddr->sa_family == AF_INET6) | |
384 | seq_printf(s, ",srcaddr=%pI6c", | |
385 | &saddr6->sin6_addr); | |
386 | else if (srcaddr->sa_family == AF_INET) | |
387 | seq_printf(s, ",srcaddr=%pI4", | |
388 | &saddr4->sin_addr.s_addr); | |
389 | else | |
390 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
391 | (int)(srcaddr->sa_family)); | |
392 | } | |
393 | ||
8616e0fc | 394 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
395 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
396 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
397 | else |
398 | seq_printf(s, ",noforceuid"); | |
340481a3 | 399 | |
8616e0fc | 400 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
402 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
403 | else |
404 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 405 | |
61f98ffd | 406 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 407 | |
8616e0fc JL |
408 | if (!tcon->unix_ext) |
409 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
410 | cifs_sb->mnt_file_mode, |
411 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
412 | if (tcon->seal) |
413 | seq_printf(s, ",seal"); | |
414 | if (tcon->nocase) | |
415 | seq_printf(s, ",nocase"); | |
416 | if (tcon->retry) | |
417 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
418 | if (tcon->unix_ext) |
419 | seq_printf(s, ",unix"); | |
420 | else | |
421 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
422 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
423 | seq_printf(s, ",posixpaths"); | |
424 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
425 | seq_printf(s, ",setuids"); | |
426 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
427 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
428 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
429 | seq_printf(s, ",rwpidforward"); | |
430 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
431 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
432 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
433 | seq_printf(s, ",directio"); | |
434 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
435 | seq_printf(s, ",nouser_xattr"); | |
436 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
437 | seq_printf(s, ",mapchars"); | |
438 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
439 | seq_printf(s, ",sfu"); | |
440 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
441 | seq_printf(s, ",nobrl"); | |
442 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
443 | seq_printf(s, ",cifsacl"); | |
444 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
445 | seq_printf(s, ",dynperm"); | |
446 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
447 | seq_printf(s, ",acl"); | |
736a3320 SM |
448 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
449 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
450 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
451 | seq_printf(s, ",fsc"); | |
8616e0fc JL |
452 | |
453 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
454 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
6d20e840 SJ |
455 | /* convert actimeo and display it in seconds */ |
456 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
8616e0fc | 457 | |
1da177e4 LT |
458 | return 0; |
459 | } | |
460 | ||
42faad99 | 461 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 462 | { |
42faad99 | 463 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 464 | struct cifs_tcon *tcon; |
68058e75 | 465 | |
4523cc30 | 466 | if (cifs_sb == NULL) |
9e2e85f8 SF |
467 | return; |
468 | ||
0d424ad0 | 469 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 470 | |
3f9bcca7 | 471 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
472 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
473 | /* we have other mounts to same share or we have | |
474 | already tried to force umount this and woken up | |
475 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 476 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
477 | return; |
478 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 479 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 480 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 481 | |
3a5ff61c | 482 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 483 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 484 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 485 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 486 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
487 | wake_up_all(&tcon->ses->server->response_q); |
488 | msleep(1); /* yield */ | |
489 | /* we have to kick the requests once more */ | |
490 | wake_up_all(&tcon->ses->server->response_q); | |
491 | msleep(1); | |
5e1253b5 | 492 | } |
68058e75 SF |
493 | |
494 | return; | |
495 | } | |
68058e75 | 496 | |
bf97d287 SF |
497 | #ifdef CONFIG_CIFS_STATS2 |
498 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
499 | { | |
500 | /* BB FIXME */ | |
501 | return 0; | |
502 | } | |
503 | #endif | |
504 | ||
1da177e4 LT |
505 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
506 | { | |
507 | *flags |= MS_NODIRATIME; | |
508 | return 0; | |
509 | } | |
510 | ||
45321ac5 | 511 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
512 | { |
513 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
514 | ||
45321ac5 AV |
515 | /* no serverino => unconditional eviction */ |
516 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
517 | generic_drop_inode(inode); | |
12420ac3 JL |
518 | } |
519 | ||
ee9b6d61 | 520 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
521 | .statfs = cifs_statfs, |
522 | .alloc_inode = cifs_alloc_inode, | |
523 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 524 | .drop_inode = cifs_drop_inode, |
b57922d9 | 525 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
526 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
527 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
528 | kernel forgets to call us with the same number of releases (closes) |
529 | as opens */ | |
1da177e4 | 530 | .show_options = cifs_show_options, |
7b7abfe3 | 531 | .umount_begin = cifs_umount_begin, |
1da177e4 | 532 | .remount_fs = cifs_remount, |
bf97d287 | 533 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 534 | .show_stats = cifs_show_stats, |
bf97d287 | 535 | #endif |
1da177e4 LT |
536 | }; |
537 | ||
f87d39d9 SF |
538 | /* |
539 | * Get root dentry from superblock according to prefix path mount option. | |
540 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
541 | */ | |
542 | static struct dentry * | |
543 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
544 | { | |
545 | int xid, rc; | |
546 | struct inode *inode; | |
547 | struct qstr name; | |
548 | struct dentry *dparent = NULL, *dchild = NULL, *alias; | |
549 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
550 | unsigned int i, full_len, len; | |
551 | char *full_path = NULL, *pstart; | |
552 | char sep; | |
553 | ||
554 | full_path = cifs_build_path_to_root(vol, cifs_sb, | |
555 | cifs_sb_master_tcon(cifs_sb)); | |
556 | if (full_path == NULL) | |
9403c9c5 | 557 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
558 | |
559 | cFYI(1, "Get root dentry for %s", full_path); | |
560 | ||
561 | xid = GetXid(); | |
562 | sep = CIFS_DIR_SEP(cifs_sb); | |
563 | dparent = dget(sb->s_root); | |
564 | full_len = strlen(full_path); | |
565 | full_path[full_len] = sep; | |
566 | pstart = full_path + 1; | |
567 | ||
568 | for (i = 1, len = 0; i <= full_len; i++) { | |
569 | if (full_path[i] != sep || !len) { | |
570 | len++; | |
571 | continue; | |
572 | } | |
573 | ||
574 | full_path[i] = 0; | |
575 | cFYI(1, "get dentry for %s", pstart); | |
576 | ||
577 | name.name = pstart; | |
578 | name.len = len; | |
579 | name.hash = full_name_hash(pstart, len); | |
580 | dchild = d_lookup(dparent, &name); | |
581 | if (dchild == NULL) { | |
582 | cFYI(1, "not exists"); | |
583 | dchild = d_alloc(dparent, &name); | |
584 | if (dchild == NULL) { | |
585 | dput(dparent); | |
9403c9c5 | 586 | dparent = ERR_PTR(-ENOMEM); |
f87d39d9 SF |
587 | goto out; |
588 | } | |
589 | } | |
590 | ||
591 | cFYI(1, "get inode"); | |
592 | if (dchild->d_inode == NULL) { | |
593 | cFYI(1, "not exists"); | |
594 | inode = NULL; | |
595 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) | |
596 | rc = cifs_get_inode_info_unix(&inode, full_path, | |
597 | sb, xid); | |
598 | else | |
599 | rc = cifs_get_inode_info(&inode, full_path, | |
600 | NULL, sb, xid, NULL); | |
601 | if (rc) { | |
602 | dput(dchild); | |
603 | dput(dparent); | |
9403c9c5 | 604 | dparent = ERR_PTR(rc); |
f87d39d9 SF |
605 | goto out; |
606 | } | |
607 | alias = d_materialise_unique(dchild, inode); | |
608 | if (alias != NULL) { | |
609 | dput(dchild); | |
610 | if (IS_ERR(alias)) { | |
611 | dput(dparent); | |
9403c9c5 | 612 | dparent = ERR_PTR(-EINVAL); /* XXX */ |
f87d39d9 SF |
613 | goto out; |
614 | } | |
615 | dchild = alias; | |
616 | } | |
617 | } | |
618 | cFYI(1, "parent %p, child %p", dparent, dchild); | |
619 | ||
620 | dput(dparent); | |
621 | dparent = dchild; | |
622 | len = 0; | |
623 | pstart = full_path + i + 1; | |
624 | full_path[i] = sep; | |
625 | } | |
626 | out: | |
627 | _FreeXid(xid); | |
628 | kfree(full_path); | |
629 | return dparent; | |
630 | } | |
631 | ||
ee01a14d AV |
632 | static int cifs_set_super(struct super_block *sb, void *data) |
633 | { | |
634 | struct cifs_mnt_data *mnt_data = data; | |
635 | sb->s_fs_info = mnt_data->cifs_sb; | |
636 | return set_anon_super(sb, NULL); | |
637 | } | |
638 | ||
d753ed97 AV |
639 | static struct dentry * |
640 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 641 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
642 | { |
643 | int rc; | |
db719222 | 644 | struct super_block *sb; |
724d9f1c PS |
645 | struct cifs_sb_info *cifs_sb; |
646 | struct smb_vol *volume_info; | |
25c7f41e | 647 | struct cifs_mnt_data mnt_data; |
724d9f1c | 648 | struct dentry *root; |
1da177e4 | 649 | |
b6b38f70 | 650 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 651 | |
04db79b0 JL |
652 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
653 | if (IS_ERR(volume_info)) | |
654 | return ERR_CAST(volume_info); | |
724d9f1c PS |
655 | |
656 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
657 | if (cifs_sb == NULL) { | |
658 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 659 | goto out_nls; |
724d9f1c PS |
660 | } |
661 | ||
5d3bc605 AV |
662 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
663 | if (cifs_sb->mountdata == NULL) { | |
664 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 665 | goto out_cifs_sb; |
5d3bc605 AV |
666 | } |
667 | ||
724d9f1c PS |
668 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
669 | ||
97d1152a AV |
670 | rc = cifs_mount(cifs_sb, volume_info); |
671 | if (rc) { | |
672 | if (!(flags & MS_SILENT)) | |
673 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
674 | root = ERR_PTR(rc); | |
5c4f1ad7 | 675 | goto out_mountdata; |
97d1152a AV |
676 | } |
677 | ||
25c7f41e PS |
678 | mnt_data.vol = volume_info; |
679 | mnt_data.cifs_sb = cifs_sb; | |
680 | mnt_data.flags = flags; | |
681 | ||
ee01a14d | 682 | sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data); |
724d9f1c | 683 | if (IS_ERR(sb)) { |
724d9f1c | 684 | root = ERR_CAST(sb); |
97d1152a | 685 | cifs_umount(cifs_sb); |
d757d71b | 686 | goto out; |
724d9f1c | 687 | } |
1da177e4 | 688 | |
ee01a14d | 689 | if (sb->s_root) { |
25c7f41e | 690 | cFYI(1, "Use existing superblock"); |
97d1152a | 691 | cifs_umount(cifs_sb); |
5c4f1ad7 AV |
692 | } else { |
693 | sb->s_flags = flags; | |
694 | /* BB should we make this contingent on mount parm? */ | |
695 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
696 | ||
697 | rc = cifs_read_super(sb); | |
698 | if (rc) { | |
699 | root = ERR_PTR(rc); | |
700 | goto out_super; | |
701 | } | |
b2e5cd33 | 702 | |
5c4f1ad7 | 703 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 704 | } |
724d9f1c | 705 | |
f87d39d9 | 706 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 707 | if (IS_ERR(root)) |
f87d39d9 | 708 | goto out_super; |
25c7f41e | 709 | |
f87d39d9 | 710 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 711 | goto out; |
724d9f1c | 712 | |
641a58d6 | 713 | out_super: |
641a58d6 | 714 | deactivate_locked_super(sb); |
641a58d6 | 715 | out: |
f9e59bcb | 716 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 717 | return root; |
5c4f1ad7 AV |
718 | |
719 | out_mountdata: | |
720 | kfree(cifs_sb->mountdata); | |
721 | out_cifs_sb: | |
722 | kfree(cifs_sb); | |
723 | out_nls: | |
724 | unload_nls(volume_info->local_nls); | |
725 | goto out; | |
1da177e4 LT |
726 | } |
727 | ||
027445c3 BP |
728 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
729 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 730 | { |
e6a00296 | 731 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 732 | ssize_t written; |
72432ffc | 733 | int rc; |
1da177e4 | 734 | |
027445c3 | 735 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
736 | |
737 | if (CIFS_I(inode)->clientCanCacheAll) | |
738 | return written; | |
739 | ||
740 | rc = filemap_fdatawrite(inode->i_mapping); | |
741 | if (rc) | |
742 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
743 | ||
1da177e4 LT |
744 | return written; |
745 | } | |
746 | ||
c32a0b68 SF |
747 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
748 | { | |
749 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 750 | if (origin == SEEK_END) { |
6feb9891 PS |
751 | int rc; |
752 | struct inode *inode = file->f_path.dentry->d_inode; | |
753 | ||
754 | /* | |
755 | * We need to be sure that all dirty pages are written and the | |
756 | * server has the newest file length. | |
757 | */ | |
758 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
759 | inode->i_mapping->nrpages != 0) { | |
760 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
761 | if (rc) { |
762 | mapping_set_error(inode->i_mapping, rc); | |
763 | return rc; | |
764 | } | |
6feb9891 PS |
765 | } |
766 | /* | |
767 | * Some applications poll for the file length in this strange | |
768 | * way so we must seek to end on non-oplocked files by | |
769 | * setting the revalidate time to zero. | |
770 | */ | |
771 | CIFS_I(inode)->time = 0; | |
772 | ||
773 | rc = cifs_revalidate_file_attr(file); | |
774 | if (rc < 0) | |
775 | return (loff_t)rc; | |
c32a0b68 | 776 | } |
9465efc9 | 777 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
778 | } |
779 | ||
84210e91 SF |
780 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
781 | { | |
b89f4321 AB |
782 | /* note that this is called by vfs setlease with lock_flocks held |
783 | to protect *lease from going away */ | |
84210e91 | 784 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 785 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
786 | |
787 | if (!(S_ISREG(inode->i_mode))) | |
788 | return -EINVAL; | |
789 | ||
790 | /* check if file is oplocked */ | |
791 | if (((arg == F_RDLCK) && | |
792 | (CIFS_I(inode)->clientCanCacheRead)) || | |
793 | ((arg == F_WRLCK) && | |
794 | (CIFS_I(inode)->clientCanCacheAll))) | |
795 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
796 | else if (tlink_tcon(cfile->tlink)->local_lease && |
797 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
798 | /* If the server claims to support oplock on this |
799 | file, then we still need to check oplock even | |
800 | if the local_lease mount option is set, but there | |
801 | are servers which do not support oplock for which | |
802 | this mount option may be useful if the user | |
803 | knows that the file won't be changed on the server | |
804 | by anyone else */ | |
805 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 806 | else |
84210e91 SF |
807 | return -EAGAIN; |
808 | } | |
84210e91 | 809 | |
e6ab1582 | 810 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
811 | .owner = THIS_MODULE, |
812 | .name = "cifs", | |
d753ed97 | 813 | .mount = cifs_do_mount, |
6d686175 | 814 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
815 | /* .fs_flags */ |
816 | }; | |
754661f1 | 817 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
818 | .create = cifs_create, |
819 | .lookup = cifs_lookup, | |
820 | .getattr = cifs_getattr, | |
821 | .unlink = cifs_unlink, | |
822 | .link = cifs_hardlink, | |
823 | .mkdir = cifs_mkdir, | |
824 | .rmdir = cifs_rmdir, | |
825 | .rename = cifs_rename, | |
826 | .permission = cifs_permission, | |
827 | /* revalidate:cifs_revalidate, */ | |
828 | .setattr = cifs_setattr, | |
829 | .symlink = cifs_symlink, | |
830 | .mknod = cifs_mknod, | |
831 | #ifdef CONFIG_CIFS_XATTR | |
832 | .setxattr = cifs_setxattr, | |
833 | .getxattr = cifs_getxattr, | |
834 | .listxattr = cifs_listxattr, | |
835 | .removexattr = cifs_removexattr, | |
836 | #endif | |
837 | }; | |
838 | ||
754661f1 | 839 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
840 | /* revalidate:cifs_revalidate, */ |
841 | .setattr = cifs_setattr, | |
842 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
843 | .rename = cifs_rename, | |
844 | .permission = cifs_permission, | |
845 | #ifdef CONFIG_CIFS_XATTR | |
846 | .setxattr = cifs_setxattr, | |
847 | .getxattr = cifs_getxattr, | |
848 | .listxattr = cifs_listxattr, | |
849 | .removexattr = cifs_removexattr, | |
50c2f753 | 850 | #endif |
1da177e4 LT |
851 | }; |
852 | ||
754661f1 | 853 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 854 | .readlink = generic_readlink, |
1da177e4 LT |
855 | .follow_link = cifs_follow_link, |
856 | .put_link = cifs_put_link, | |
857 | .permission = cifs_permission, | |
858 | /* BB add the following two eventually */ | |
859 | /* revalidate: cifs_revalidate, | |
860 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
861 | #ifdef CONFIG_CIFS_XATTR | |
862 | .setxattr = cifs_setxattr, | |
863 | .getxattr = cifs_getxattr, | |
864 | .listxattr = cifs_listxattr, | |
865 | .removexattr = cifs_removexattr, | |
50c2f753 | 866 | #endif |
1da177e4 LT |
867 | }; |
868 | ||
4b6f5d20 | 869 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
870 | .read = do_sync_read, |
871 | .write = do_sync_write, | |
87c89dd7 SF |
872 | .aio_read = generic_file_aio_read, |
873 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
874 | .open = cifs_open, |
875 | .release = cifs_close, | |
876 | .lock = cifs_lock, | |
877 | .fsync = cifs_fsync, | |
878 | .flush = cifs_flush, | |
879 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 880 | .splice_read = generic_file_splice_read, |
c32a0b68 | 881 | .llseek = cifs_llseek, |
c67593a0 | 882 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 883 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 884 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 885 | .setlease = cifs_setlease, |
1da177e4 LT |
886 | }; |
887 | ||
8be7e6ba PS |
888 | const struct file_operations cifs_file_strict_ops = { |
889 | .read = do_sync_read, | |
890 | .write = do_sync_write, | |
a70307ee | 891 | .aio_read = cifs_strict_readv, |
72432ffc | 892 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
893 | .open = cifs_open, |
894 | .release = cifs_close, | |
895 | .lock = cifs_lock, | |
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_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, | |
1da177e4 LT |
913 | .open = cifs_open, |
914 | .release = cifs_close, | |
915 | .lock = cifs_lock, | |
916 | .fsync = cifs_fsync, | |
917 | .flush = cifs_flush, | |
a994b8fa | 918 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 919 | .splice_read = generic_file_splice_read, |
c67593a0 | 920 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 921 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 922 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 923 | .llseek = cifs_llseek, |
84210e91 | 924 | .setlease = cifs_setlease, |
1da177e4 | 925 | }; |
8be7e6ba | 926 | |
4b6f5d20 | 927 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
928 | .read = do_sync_read, |
929 | .write = do_sync_write, | |
87c89dd7 SF |
930 | .aio_read = generic_file_aio_read, |
931 | .aio_write = cifs_file_aio_write, | |
932 | .open = cifs_open, | |
933 | .release = cifs_close, | |
934 | .fsync = cifs_fsync, | |
935 | .flush = cifs_flush, | |
936 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 937 | .splice_read = generic_file_splice_read, |
c32a0b68 | 938 | .llseek = cifs_llseek, |
8b94bcb9 | 939 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 940 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 941 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 942 | .setlease = cifs_setlease, |
8b94bcb9 SF |
943 | }; |
944 | ||
8be7e6ba PS |
945 | const struct file_operations cifs_file_strict_nobrl_ops = { |
946 | .read = do_sync_read, | |
947 | .write = do_sync_write, | |
a70307ee | 948 | .aio_read = cifs_strict_readv, |
72432ffc | 949 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
950 | .open = cifs_open, |
951 | .release = cifs_close, | |
952 | .fsync = cifs_strict_fsync, | |
953 | .flush = cifs_flush, | |
7a6a19b1 | 954 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
955 | .splice_read = generic_file_splice_read, |
956 | .llseek = cifs_llseek, | |
957 | #ifdef CONFIG_CIFS_POSIX | |
958 | .unlocked_ioctl = cifs_ioctl, | |
959 | #endif /* CONFIG_CIFS_POSIX */ | |
960 | .setlease = cifs_setlease, | |
961 | }; | |
962 | ||
4b6f5d20 | 963 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
964 | /* BB reevaluate whether they can be done with directio, no cache */ |
965 | .read = do_sync_read, | |
966 | .write = do_sync_write, | |
967 | .aio_read = cifs_user_readv, | |
968 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
969 | .open = cifs_open, |
970 | .release = cifs_close, | |
971 | .fsync = cifs_fsync, | |
972 | .flush = cifs_flush, | |
810627a0 | 973 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 974 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 975 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 976 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 977 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 978 | .llseek = cifs_llseek, |
84210e91 | 979 | .setlease = cifs_setlease, |
8b94bcb9 | 980 | }; |
1da177e4 | 981 | |
4b6f5d20 | 982 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
983 | .readdir = cifs_readdir, |
984 | .release = cifs_closedir, | |
985 | .read = generic_read_dir, | |
f9ddcca4 | 986 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 987 | .llseek = generic_file_llseek, |
1da177e4 LT |
988 | }; |
989 | ||
990 | static void | |
51cc5068 | 991 | cifs_init_once(void *inode) |
1da177e4 LT |
992 | { |
993 | struct cifsInodeInfo *cifsi = inode; | |
994 | ||
a35afb83 CL |
995 | inode_init_once(&cifsi->vfs_inode); |
996 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
997 | } |
998 | ||
999 | static int | |
1000 | cifs_init_inodecache(void) | |
1001 | { | |
1002 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 1003 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
1004 | 0, (SLAB_RECLAIM_ACCOUNT| |
1005 | SLAB_MEM_SPREAD), | |
20c2df83 | 1006 | cifs_init_once); |
1da177e4 LT |
1007 | if (cifs_inode_cachep == NULL) |
1008 | return -ENOMEM; | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static void | |
1014 | cifs_destroy_inodecache(void) | |
1015 | { | |
1a1d92c1 | 1016 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | static int | |
1020 | cifs_init_request_bufs(void) | |
1021 | { | |
4523cc30 | 1022 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
1023 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
1024 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
1025 | CIFSMaxBufSize = 8192; | |
1026 | } else if (CIFSMaxBufSize > 1024*127) { | |
1027 | CIFSMaxBufSize = 1024 * 127; | |
1028 | } else { | |
1029 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1030 | } | |
b6b38f70 | 1031 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
1032 | cifs_req_cachep = kmem_cache_create("cifs_request", |
1033 | CIFSMaxBufSize + | |
1034 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 1035 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1036 | if (cifs_req_cachep == NULL) |
1037 | return -ENOMEM; | |
1038 | ||
4523cc30 | 1039 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1040 | cifs_min_rcv = 1; |
1041 | else if (cifs_min_rcv > 64) { | |
1042 | cifs_min_rcv = 64; | |
b6b38f70 | 1043 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
1044 | } |
1045 | ||
93d2341c MD |
1046 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1047 | cifs_req_cachep); | |
1da177e4 | 1048 | |
4523cc30 | 1049 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1050 | kmem_cache_destroy(cifs_req_cachep); |
1051 | return -ENOMEM; | |
1052 | } | |
ec637e3f | 1053 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1054 | almost all handle based requests (but not write response, nor is it |
1055 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1056 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1057 | for the case in which debug was on, but this larger size allows |
1058 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1059 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1060 | alloc of large cifs buffers even when page debugging is on */ |
1061 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1062 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1063 | NULL); |
1da177e4 LT |
1064 | if (cifs_sm_req_cachep == NULL) { |
1065 | mempool_destroy(cifs_req_poolp); | |
1066 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1067 | return -ENOMEM; |
1da177e4 LT |
1068 | } |
1069 | ||
4523cc30 | 1070 | if (cifs_min_small < 2) |
1da177e4 LT |
1071 | cifs_min_small = 2; |
1072 | else if (cifs_min_small > 256) { | |
1073 | cifs_min_small = 256; | |
b6b38f70 | 1074 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1075 | } |
1076 | ||
93d2341c MD |
1077 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1078 | cifs_sm_req_cachep); | |
1da177e4 | 1079 | |
4523cc30 | 1080 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1081 | mempool_destroy(cifs_req_poolp); |
1082 | kmem_cache_destroy(cifs_req_cachep); | |
1083 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1084 | return -ENOMEM; | |
1085 | } | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | static void | |
1091 | cifs_destroy_request_bufs(void) | |
1092 | { | |
1093 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1094 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1095 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1096 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | static int | |
1100 | cifs_init_mids(void) | |
1101 | { | |
1102 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1103 | sizeof(struct mid_q_entry), 0, |
1104 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1105 | if (cifs_mid_cachep == NULL) |
1106 | return -ENOMEM; | |
1107 | ||
93d2341c MD |
1108 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1109 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1110 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1111 | kmem_cache_destroy(cifs_mid_cachep); |
1112 | return -ENOMEM; | |
1113 | } | |
1114 | ||
1da177e4 LT |
1115 | return 0; |
1116 | } | |
1117 | ||
1118 | static void | |
1119 | cifs_destroy_mids(void) | |
1120 | { | |
1121 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1122 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1123 | } |
1124 | ||
1da177e4 LT |
1125 | static int __init |
1126 | init_cifs(void) | |
1127 | { | |
1128 | int rc = 0; | |
1da177e4 | 1129 | cifs_proc_init(); |
e7ddee90 | 1130 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1131 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1132 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1133 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1134 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1135 | /* |
1136 | * Initialize Global counters | |
1137 | */ | |
1138 | atomic_set(&sesInfoAllocCount, 0); | |
1139 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1140 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1141 | atomic_set(&tcpSesReconnectCount, 0); |
1142 | atomic_set(&tconInfoReconnectCount, 0); | |
1143 | ||
1144 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1145 | atomic_set(&smBufAllocCount, 0); |
1146 | #ifdef CONFIG_CIFS_STATS2 | |
1147 | atomic_set(&totBufAllocCount, 0); | |
1148 | atomic_set(&totSmBufAllocCount, 0); | |
1149 | #endif /* CONFIG_CIFS_STATS2 */ | |
1150 | ||
1da177e4 LT |
1151 | atomic_set(&midCount, 0); |
1152 | GlobalCurrentXid = 0; | |
1153 | GlobalTotalActiveXid = 0; | |
1154 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1155 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1156 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1157 | spin_lock_init(&GlobalMid_Lock); |
1158 | ||
4523cc30 | 1159 | if (cifs_max_pending < 2) { |
1da177e4 | 1160 | cifs_max_pending = 2; |
b6b38f70 | 1161 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 1162 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1163 | cifs_max_pending = 256; |
b6b38f70 | 1164 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
1165 | } |
1166 | ||
f579cf3c SJ |
1167 | rc = cifs_fscache_register(); |
1168 | if (rc) | |
d3bf5221 | 1169 | goto out_clean_proc; |
f579cf3c | 1170 | |
1da177e4 | 1171 | rc = cifs_init_inodecache(); |
45af7a0f | 1172 | if (rc) |
d3bf5221 | 1173 | goto out_unreg_fscache; |
45af7a0f SF |
1174 | |
1175 | rc = cifs_init_mids(); | |
1176 | if (rc) | |
1177 | goto out_destroy_inodecache; | |
1178 | ||
1179 | rc = cifs_init_request_bufs(); | |
1180 | if (rc) | |
1181 | goto out_destroy_mids; | |
1182 | ||
84a15b93 JL |
1183 | #ifdef CONFIG_CIFS_UPCALL |
1184 | rc = register_key_type(&cifs_spnego_key_type); | |
1185 | if (rc) | |
4d79dba0 SP |
1186 | goto out_destroy_request_bufs; |
1187 | #endif /* CONFIG_CIFS_UPCALL */ | |
1188 | ||
1189 | #ifdef CONFIG_CIFS_ACL | |
1190 | rc = init_cifs_idmap(); | |
1191 | if (rc) | |
c4aca0c0 | 1192 | goto out_register_key_type; |
4d79dba0 SP |
1193 | #endif /* CONFIG_CIFS_ACL */ |
1194 | ||
1195 | rc = register_filesystem(&cifs_fs_type); | |
1196 | if (rc) | |
c4aca0c0 | 1197 | goto out_init_cifs_idmap; |
45af7a0f | 1198 | |
45af7a0f SF |
1199 | return 0; |
1200 | ||
c4aca0c0 | 1201 | out_init_cifs_idmap: |
4d79dba0 SP |
1202 | #ifdef CONFIG_CIFS_ACL |
1203 | exit_cifs_idmap(); | |
c4aca0c0 | 1204 | out_register_key_type: |
4d79dba0 | 1205 | #endif |
84a15b93 | 1206 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1207 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1208 | out_destroy_request_bufs: |
1fc7995d | 1209 | #endif |
45af7a0f | 1210 | cifs_destroy_request_bufs(); |
d3bf5221 | 1211 | out_destroy_mids: |
45af7a0f | 1212 | cifs_destroy_mids(); |
d3bf5221 | 1213 | out_destroy_inodecache: |
45af7a0f | 1214 | cifs_destroy_inodecache(); |
d3bf5221 | 1215 | out_unreg_fscache: |
f579cf3c | 1216 | cifs_fscache_unregister(); |
d3bf5221 SF |
1217 | out_clean_proc: |
1218 | cifs_proc_clean(); | |
1da177e4 LT |
1219 | return rc; |
1220 | } | |
1221 | ||
1222 | static void __exit | |
1223 | exit_cifs(void) | |
1224 | { | |
b6b38f70 | 1225 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 1226 | cifs_proc_clean(); |
f579cf3c | 1227 | cifs_fscache_unregister(); |
6103335d | 1228 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1229 | cifs_dfs_release_automount_timer(); |
6103335d | 1230 | #endif |
4d79dba0 SP |
1231 | #ifdef CONFIG_CIFS_ACL |
1232 | cifs_destroy_idmaptrees(); | |
1233 | exit_cifs_idmap(); | |
1234 | #endif | |
84a15b93 JL |
1235 | #ifdef CONFIG_CIFS_UPCALL |
1236 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1237 | #endif |
1238 | unregister_filesystem(&cifs_fs_type); | |
1239 | cifs_destroy_inodecache(); | |
1240 | cifs_destroy_mids(); | |
1241 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1245 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1246 | MODULE_DESCRIPTION |
63135e08 SF |
1247 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1248 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1249 | MODULE_VERSION(CIFS_VERSION); |
1250 | module_init(init_cifs) | |
1251 | module_exit(exit_cifs) |