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1 | /* | |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2008 | |
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> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/kthread.h> | |
37 | #include <linux/freezer.h> | |
38 | #include <net/ipv6.h> | |
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> | |
47 | #include <linux/key-type.h> | |
48 | #include "cifs_spnego.h" | |
49 | #include "fscache.h" | |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ | |
51 | ||
52 | int cifsFYI = 0; | |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
56 | unsigned int linuxExtEnabled = 1; | |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
59 | unsigned int global_secflags = CIFSSEC_DEF; | |
60 | /* unsigned int ntlmv2_support = 0; */ | |
61 | unsigned int sign_CIFS_PDUs = 1; | |
62 | static const struct super_operations cifs_super_ops; | |
63 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; | |
64 | module_param(CIFSMaxBufSize, int, 0); | |
65 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " | |
66 | "Default: 16384 Range: 8192 to 130048"); | |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
68 | module_param(cifs_min_rcv, int, 0); | |
69 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " | |
70 | "1 to 64"); | |
71 | unsigned int cifs_min_small = 30; | |
72 | module_param(cifs_min_small, int, 0); | |
73 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " | |
74 | "Range: 2 to 256"); | |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
76 | module_param(cifs_max_pending, int, 0); | |
77 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " | |
78 | "Default: 50 Range: 2 to 256"); | |
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."); | |
84 | extern mempool_t *cifs_sm_req_poolp; | |
85 | extern mempool_t *cifs_req_poolp; | |
86 | extern mempool_t *cifs_mid_poolp; | |
87 | ||
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 | ||
106 | static int | |
107 | cifs_read_super(struct super_block *sb) | |
108 | { | |
109 | struct inode *inode; | |
110 | struct cifs_sb_info *cifs_sb; | |
111 | int rc = 0; | |
112 | ||
113 | cifs_sb = CIFS_SB(sb); | |
114 | ||
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 | ||
126 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
127 | sb->s_op = &cifs_super_ops; | |
128 | sb->s_bdi = &cifs_sb->bdi; | |
129 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
130 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
131 | inode = cifs_root_iget(sb); | |
132 | ||
133 | if (IS_ERR(inode)) { | |
134 | rc = PTR_ERR(inode); | |
135 | inode = NULL; | |
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 | } | |
145 | ||
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 | ||
152 | #ifdef CIFS_NFSD_EXPORT | |
153 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
154 | cFYI(1, "export ops supported"); | |
155 | sb->s_export_op = &cifs_export_ops; | |
156 | } | |
157 | #endif /* CIFS_NFSD_EXPORT */ | |
158 | ||
159 | return 0; | |
160 | ||
161 | out_no_root: | |
162 | cERROR(1, "cifs_read_super: get root inode failed"); | |
163 | if (inode) | |
164 | iput(inode); | |
165 | ||
166 | return rc; | |
167 | } | |
168 | ||
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); | |
173 | cifs_umount(cifs_sb); | |
174 | } | |
175 | ||
176 | static int | |
177 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
178 | { | |
179 | struct super_block *sb = dentry->d_sb; | |
180 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
181 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
182 | int rc = -EOPNOTSUPP; | |
183 | int xid; | |
184 | ||
185 | xid = GetXid(); | |
186 | ||
187 | buf->f_type = CIFS_MAGIC_NUMBER; | |
188 | ||
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; | |
197 | buf->f_files = 0; /* undefined */ | |
198 | buf->f_ffree = 0; /* unlimited */ | |
199 | ||
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 | */ | |
219 | if (rc) | |
220 | rc = SMBOldQFSInfo(xid, tcon, buf); | |
221 | ||
222 | FreeXid(xid); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) | |
227 | { | |
228 | struct cifs_sb_info *cifs_sb; | |
229 | ||
230 | cifs_sb = CIFS_SB(inode->i_sb); | |
231 | ||
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 | |
238 | on the client (above and beyond ACL on servers) for | |
239 | servers which do not support setting and viewing mode bits, | |
240 | so allowing client to check permissions is useful */ | |
241 | return generic_permission(inode, mask, flags, NULL); | |
242 | } | |
243 | ||
244 | static struct kmem_cache *cifs_inode_cachep; | |
245 | static struct kmem_cache *cifs_req_cachep; | |
246 | static struct kmem_cache *cifs_mid_cachep; | |
247 | static struct kmem_cache *cifs_sm_req_cachep; | |
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; | |
256 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); | |
257 | if (!cifs_inode) | |
258 | return NULL; | |
259 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
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 */ | |
264 | cifs_set_oplock_level(cifs_inode, 0); | |
265 | cifs_inode->delete_pending = false; | |
266 | cifs_inode->invalid_mapping = false; | |
267 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ | |
268 | cifs_inode->server_eof = 0; | |
269 | cifs_inode->uniqueid = 0; | |
270 | cifs_inode->createtime = 0; | |
271 | ||
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;*/ | |
275 | INIT_LIST_HEAD(&cifs_inode->openFileList); | |
276 | return &cifs_inode->vfs_inode; | |
277 | } | |
278 | ||
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 | ||
286 | static void | |
287 | cifs_destroy_inode(struct inode *inode) | |
288 | { | |
289 | call_rcu(&inode->i_rcu, cifs_i_callback); | |
290 | } | |
291 | ||
292 | static void | |
293 | cifs_evict_inode(struct inode *inode) | |
294 | { | |
295 | truncate_inode_pages(&inode->i_data, 0); | |
296 | end_writeback(inode); | |
297 | cifs_fscache_release_inode_cookie(inode); | |
298 | } | |
299 | ||
300 | static void | |
301 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
302 | { | |
303 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; | |
304 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
305 | ||
306 | seq_printf(s, ",addr="); | |
307 | ||
308 | switch (server->dstaddr.ss_family) { | |
309 | case AF_INET: | |
310 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); | |
311 | break; | |
312 | case AF_INET6: | |
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); | |
316 | break; | |
317 | default: | |
318 | seq_printf(s, "(unknown)"); | |
319 | } | |
320 | } | |
321 | ||
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 | ||
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 | { | |
361 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); | |
362 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
363 | struct sockaddr *srcaddr; | |
364 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
365 | ||
366 | cifs_show_security(s, tcon->ses->server); | |
367 | ||
368 | seq_printf(s, ",unc=%s", tcon->treeName); | |
369 | ||
370 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
371 | seq_printf(s, ",multiuser"); | |
372 | else if (tcon->ses->user_name) | |
373 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
374 | ||
375 | if (tcon->ses->domainName) | |
376 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
377 | ||
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 | ||
394 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
395 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) | |
396 | seq_printf(s, ",forceuid"); | |
397 | else | |
398 | seq_printf(s, ",noforceuid"); | |
399 | ||
400 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
402 | seq_printf(s, ",forcegid"); | |
403 | else | |
404 | seq_printf(s, ",noforcegid"); | |
405 | ||
406 | cifs_show_address(s, tcon->ses->server); | |
407 | ||
408 | if (!tcon->unix_ext) | |
409 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
410 | cifs_sb->mnt_file_mode, | |
411 | cifs_sb->mnt_dir_mode); | |
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"); | |
418 | if (tcon->unix_ext) | |
419 | seq_printf(s, ",unix"); | |
420 | else | |
421 | seq_printf(s, ",nounix"); | |
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"); | |
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"); | |
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"); | |
448 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) | |
449 | seq_printf(s, ",mfsymlinks"); | |
450 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) | |
451 | seq_printf(s, ",fsc"); | |
452 | ||
453 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
454 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
455 | /* convert actimeo and display it in seconds */ | |
456 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static void cifs_umount_begin(struct super_block *sb) | |
462 | { | |
463 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
464 | struct cifs_tcon *tcon; | |
465 | ||
466 | if (cifs_sb == NULL) | |
467 | return; | |
468 | ||
469 | tcon = cifs_sb_master_tcon(cifs_sb); | |
470 | ||
471 | spin_lock(&cifs_tcp_ses_lock); | |
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 */ | |
476 | spin_unlock(&cifs_tcp_ses_lock); | |
477 | return; | |
478 | } else if (tcon->tc_count == 1) | |
479 | tcon->tidStatus = CifsExiting; | |
480 | spin_unlock(&cifs_tcp_ses_lock); | |
481 | ||
482 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ | |
483 | /* cancel_notify_requests(tcon); */ | |
484 | if (tcon->ses && tcon->ses->server) { | |
485 | cFYI(1, "wake up tasks now - umount begin not complete"); | |
486 | wake_up_all(&tcon->ses->server->request_q); | |
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); | |
492 | } | |
493 | ||
494 | return; | |
495 | } | |
496 | ||
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 | ||
505 | static int cifs_remount(struct super_block *sb, int *flags, char *data) | |
506 | { | |
507 | *flags |= MS_NODIRATIME; | |
508 | return 0; | |
509 | } | |
510 | ||
511 | static int cifs_drop_inode(struct inode *inode) | |
512 | { | |
513 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
514 | ||
515 | /* no serverino => unconditional eviction */ | |
516 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
517 | generic_drop_inode(inode); | |
518 | } | |
519 | ||
520 | static const struct super_operations cifs_super_ops = { | |
521 | .statfs = cifs_statfs, | |
522 | .alloc_inode = cifs_alloc_inode, | |
523 | .destroy_inode = cifs_destroy_inode, | |
524 | .drop_inode = cifs_drop_inode, | |
525 | .evict_inode = cifs_evict_inode, | |
526 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above | |
527 | function unless later we add lazy close of inodes or unless the | |
528 | kernel forgets to call us with the same number of releases (closes) | |
529 | as opens */ | |
530 | .show_options = cifs_show_options, | |
531 | .umount_begin = cifs_umount_begin, | |
532 | .remount_fs = cifs_remount, | |
533 | #ifdef CONFIG_CIFS_STATS2 | |
534 | .show_stats = cifs_show_stats, | |
535 | #endif | |
536 | }; | |
537 | ||
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) | |
557 | return ERR_PTR(-ENOMEM); | |
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); | |
586 | dparent = ERR_PTR(-ENOMEM); | |
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); | |
604 | dparent = ERR_PTR(rc); | |
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); | |
612 | dparent = ERR_PTR(-EINVAL); /* XXX */ | |
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 | ||
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 | ||
639 | static struct dentry * | |
640 | cifs_do_mount(struct file_system_type *fs_type, | |
641 | int flags, const char *dev_name, void *data) | |
642 | { | |
643 | int rc; | |
644 | struct super_block *sb; | |
645 | struct cifs_sb_info *cifs_sb; | |
646 | struct smb_vol *volume_info; | |
647 | struct cifs_mnt_data mnt_data; | |
648 | struct dentry *root; | |
649 | ||
650 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); | |
651 | ||
652 | rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name); | |
653 | if (rc) | |
654 | return ERR_PTR(rc); | |
655 | ||
656 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
657 | if (cifs_sb == NULL) { | |
658 | root = ERR_PTR(-ENOMEM); | |
659 | goto out_nls; | |
660 | } | |
661 | ||
662 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); | |
663 | if (cifs_sb->mountdata == NULL) { | |
664 | root = ERR_PTR(-ENOMEM); | |
665 | goto out_cifs_sb; | |
666 | } | |
667 | ||
668 | cifs_setup_cifs_sb(volume_info, cifs_sb); | |
669 | ||
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); | |
675 | goto out_mountdata; | |
676 | } | |
677 | ||
678 | mnt_data.vol = volume_info; | |
679 | mnt_data.cifs_sb = cifs_sb; | |
680 | mnt_data.flags = flags; | |
681 | ||
682 | sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data); | |
683 | if (IS_ERR(sb)) { | |
684 | root = ERR_CAST(sb); | |
685 | cifs_umount(cifs_sb); | |
686 | goto out; | |
687 | } | |
688 | ||
689 | if (sb->s_root) { | |
690 | cFYI(1, "Use existing superblock"); | |
691 | cifs_umount(cifs_sb); | |
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 | } | |
702 | ||
703 | sb->s_flags |= MS_ACTIVE; | |
704 | } | |
705 | ||
706 | root = cifs_get_root(volume_info, sb); | |
707 | if (IS_ERR(root)) | |
708 | goto out_super; | |
709 | ||
710 | cFYI(1, "dentry root is: %p", root); | |
711 | goto out; | |
712 | ||
713 | out_super: | |
714 | deactivate_locked_super(sb); | |
715 | out: | |
716 | cifs_cleanup_volume_info(&volume_info); | |
717 | return root; | |
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; | |
726 | } | |
727 | ||
728 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
729 | unsigned long nr_segs, loff_t pos) | |
730 | { | |
731 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; | |
732 | ssize_t written; | |
733 | int rc; | |
734 | ||
735 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); | |
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 | ||
744 | return written; | |
745 | } | |
746 | ||
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 */ | |
750 | if (origin == SEEK_END) { | |
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); | |
761 | if (rc) { | |
762 | mapping_set_error(inode->i_mapping, rc); | |
763 | return rc; | |
764 | } | |
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; | |
776 | } | |
777 | return generic_file_llseek_unlocked(file, offset, origin); | |
778 | } | |
779 | ||
780 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) | |
781 | { | |
782 | /* note that this is called by vfs setlease with lock_flocks held | |
783 | to protect *lease from going away */ | |
784 | struct inode *inode = file->f_path.dentry->d_inode; | |
785 | struct cifsFileInfo *cfile = file->private_data; | |
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); | |
796 | else if (tlink_tcon(cfile->tlink)->local_lease && | |
797 | !CIFS_I(inode)->clientCanCacheRead) | |
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); | |
806 | else | |
807 | return -EAGAIN; | |
808 | } | |
809 | ||
810 | struct file_system_type cifs_fs_type = { | |
811 | .owner = THIS_MODULE, | |
812 | .name = "cifs", | |
813 | .mount = cifs_do_mount, | |
814 | .kill_sb = cifs_kill_sb, | |
815 | /* .fs_flags */ | |
816 | }; | |
817 | const struct inode_operations cifs_dir_inode_ops = { | |
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 | ||
839 | const struct inode_operations cifs_file_inode_ops = { | |
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, | |
850 | #endif | |
851 | }; | |
852 | ||
853 | const struct inode_operations cifs_symlink_inode_ops = { | |
854 | .readlink = generic_readlink, | |
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, | |
866 | #endif | |
867 | }; | |
868 | ||
869 | const struct file_operations cifs_file_ops = { | |
870 | .read = do_sync_read, | |
871 | .write = do_sync_write, | |
872 | .aio_read = generic_file_aio_read, | |
873 | .aio_write = cifs_file_aio_write, | |
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, | |
880 | .splice_read = generic_file_splice_read, | |
881 | .llseek = cifs_llseek, | |
882 | #ifdef CONFIG_CIFS_POSIX | |
883 | .unlocked_ioctl = cifs_ioctl, | |
884 | #endif /* CONFIG_CIFS_POSIX */ | |
885 | .setlease = cifs_setlease, | |
886 | }; | |
887 | ||
888 | const struct file_operations cifs_file_strict_ops = { | |
889 | .read = do_sync_read, | |
890 | .write = do_sync_write, | |
891 | .aio_read = cifs_strict_readv, | |
892 | .aio_write = cifs_strict_writev, | |
893 | .open = cifs_open, | |
894 | .release = cifs_close, | |
895 | .lock = cifs_lock, | |
896 | .fsync = cifs_strict_fsync, | |
897 | .flush = cifs_flush, | |
898 | .mmap = cifs_file_strict_mmap, | |
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 | ||
907 | const struct file_operations cifs_file_direct_ops = { | |
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, | |
913 | .open = cifs_open, | |
914 | .release = cifs_close, | |
915 | .lock = cifs_lock, | |
916 | .fsync = cifs_fsync, | |
917 | .flush = cifs_flush, | |
918 | .mmap = cifs_file_mmap, | |
919 | .splice_read = generic_file_splice_read, | |
920 | #ifdef CONFIG_CIFS_POSIX | |
921 | .unlocked_ioctl = cifs_ioctl, | |
922 | #endif /* CONFIG_CIFS_POSIX */ | |
923 | .llseek = cifs_llseek, | |
924 | .setlease = cifs_setlease, | |
925 | }; | |
926 | ||
927 | const struct file_operations cifs_file_nobrl_ops = { | |
928 | .read = do_sync_read, | |
929 | .write = do_sync_write, | |
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, | |
937 | .splice_read = generic_file_splice_read, | |
938 | .llseek = cifs_llseek, | |
939 | #ifdef CONFIG_CIFS_POSIX | |
940 | .unlocked_ioctl = cifs_ioctl, | |
941 | #endif /* CONFIG_CIFS_POSIX */ | |
942 | .setlease = cifs_setlease, | |
943 | }; | |
944 | ||
945 | const struct file_operations cifs_file_strict_nobrl_ops = { | |
946 | .read = do_sync_read, | |
947 | .write = do_sync_write, | |
948 | .aio_read = cifs_strict_readv, | |
949 | .aio_write = cifs_strict_writev, | |
950 | .open = cifs_open, | |
951 | .release = cifs_close, | |
952 | .fsync = cifs_strict_fsync, | |
953 | .flush = cifs_flush, | |
954 | .mmap = cifs_file_strict_mmap, | |
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 | ||
963 | const struct file_operations cifs_file_direct_nobrl_ops = { | |
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, | |
969 | .open = cifs_open, | |
970 | .release = cifs_close, | |
971 | .fsync = cifs_fsync, | |
972 | .flush = cifs_flush, | |
973 | .mmap = cifs_file_mmap, | |
974 | .splice_read = generic_file_splice_read, | |
975 | #ifdef CONFIG_CIFS_POSIX | |
976 | .unlocked_ioctl = cifs_ioctl, | |
977 | #endif /* CONFIG_CIFS_POSIX */ | |
978 | .llseek = cifs_llseek, | |
979 | .setlease = cifs_setlease, | |
980 | }; | |
981 | ||
982 | const struct file_operations cifs_dir_ops = { | |
983 | .readdir = cifs_readdir, | |
984 | .release = cifs_closedir, | |
985 | .read = generic_read_dir, | |
986 | .unlocked_ioctl = cifs_ioctl, | |
987 | .llseek = generic_file_llseek, | |
988 | }; | |
989 | ||
990 | static void | |
991 | cifs_init_once(void *inode) | |
992 | { | |
993 | struct cifsInodeInfo *cifsi = inode; | |
994 | ||
995 | inode_init_once(&cifsi->vfs_inode); | |
996 | INIT_LIST_HEAD(&cifsi->lockList); | |
997 | } | |
998 | ||
999 | static int | |
1000 | cifs_init_inodecache(void) | |
1001 | { | |
1002 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
1003 | sizeof(struct cifsInodeInfo), | |
1004 | 0, (SLAB_RECLAIM_ACCOUNT| | |
1005 | SLAB_MEM_SPREAD), | |
1006 | cifs_init_once); | |
1007 | if (cifs_inode_cachep == NULL) | |
1008 | return -ENOMEM; | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static void | |
1014 | cifs_destroy_inodecache(void) | |
1015 | { | |
1016 | kmem_cache_destroy(cifs_inode_cachep); | |
1017 | } | |
1018 | ||
1019 | static int | |
1020 | cifs_init_request_bufs(void) | |
1021 | { | |
1022 | if (CIFSMaxBufSize < 8192) { | |
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 | } | |
1031 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ | |
1032 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
1033 | CIFSMaxBufSize + | |
1034 | MAX_CIFS_HDR_SIZE, 0, | |
1035 | SLAB_HWCACHE_ALIGN, NULL); | |
1036 | if (cifs_req_cachep == NULL) | |
1037 | return -ENOMEM; | |
1038 | ||
1039 | if (cifs_min_rcv < 1) | |
1040 | cifs_min_rcv = 1; | |
1041 | else if (cifs_min_rcv > 64) { | |
1042 | cifs_min_rcv = 64; | |
1043 | cERROR(1, "cifs_min_rcv set to maximum (64)"); | |
1044 | } | |
1045 | ||
1046 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, | |
1047 | cifs_req_cachep); | |
1048 | ||
1049 | if (cifs_req_poolp == NULL) { | |
1050 | kmem_cache_destroy(cifs_req_cachep); | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and | |
1054 | almost all handle based requests (but not write response, nor is it | |
1055 | sufficient for path based requests). A smaller size would have | |
1056 | been more efficient (compacting multiple slab items on one 4k page) | |
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 | |
1059 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
1060 | alloc of large cifs buffers even when page debugging is on */ | |
1061 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
1062 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
1063 | NULL); | |
1064 | if (cifs_sm_req_cachep == NULL) { | |
1065 | mempool_destroy(cifs_req_poolp); | |
1066 | kmem_cache_destroy(cifs_req_cachep); | |
1067 | return -ENOMEM; | |
1068 | } | |
1069 | ||
1070 | if (cifs_min_small < 2) | |
1071 | cifs_min_small = 2; | |
1072 | else if (cifs_min_small > 256) { | |
1073 | cifs_min_small = 256; | |
1074 | cFYI(1, "cifs_min_small set to maximum (256)"); | |
1075 | } | |
1076 | ||
1077 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, | |
1078 | cifs_sm_req_cachep); | |
1079 | ||
1080 | if (cifs_sm_req_poolp == NULL) { | |
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); | |
1094 | kmem_cache_destroy(cifs_req_cachep); | |
1095 | mempool_destroy(cifs_sm_req_poolp); | |
1096 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1097 | } | |
1098 | ||
1099 | static int | |
1100 | cifs_init_mids(void) | |
1101 | { | |
1102 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
1103 | sizeof(struct mid_q_entry), 0, | |
1104 | SLAB_HWCACHE_ALIGN, NULL); | |
1105 | if (cifs_mid_cachep == NULL) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | /* 3 is a reasonable minimum number of simultaneous operations */ | |
1109 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
1110 | if (cifs_mid_poolp == NULL) { | |
1111 | kmem_cache_destroy(cifs_mid_cachep); | |
1112 | return -ENOMEM; | |
1113 | } | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static void | |
1119 | cifs_destroy_mids(void) | |
1120 | { | |
1121 | mempool_destroy(cifs_mid_poolp); | |
1122 | kmem_cache_destroy(cifs_mid_cachep); | |
1123 | } | |
1124 | ||
1125 | static int __init | |
1126 | init_cifs(void) | |
1127 | { | |
1128 | int rc = 0; | |
1129 | cifs_proc_init(); | |
1130 | INIT_LIST_HEAD(&cifs_tcp_ses_list); | |
1131 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ | |
1132 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
1133 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
1134 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ | |
1135 | /* | |
1136 | * Initialize Global counters | |
1137 | */ | |
1138 | atomic_set(&sesInfoAllocCount, 0); | |
1139 | atomic_set(&tconInfoAllocCount, 0); | |
1140 | atomic_set(&tcpSesAllocCount, 0); | |
1141 | atomic_set(&tcpSesReconnectCount, 0); | |
1142 | atomic_set(&tconInfoReconnectCount, 0); | |
1143 | ||
1144 | atomic_set(&bufAllocCount, 0); | |
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 | ||
1151 | atomic_set(&midCount, 0); | |
1152 | GlobalCurrentXid = 0; | |
1153 | GlobalTotalActiveXid = 0; | |
1154 | GlobalMaxActiveXid = 0; | |
1155 | spin_lock_init(&cifs_tcp_ses_lock); | |
1156 | spin_lock_init(&cifs_file_list_lock); | |
1157 | spin_lock_init(&GlobalMid_Lock); | |
1158 | ||
1159 | if (cifs_max_pending < 2) { | |
1160 | cifs_max_pending = 2; | |
1161 | cFYI(1, "cifs_max_pending set to min of 2"); | |
1162 | } else if (cifs_max_pending > 256) { | |
1163 | cifs_max_pending = 256; | |
1164 | cFYI(1, "cifs_max_pending set to max of 256"); | |
1165 | } | |
1166 | ||
1167 | rc = cifs_fscache_register(); | |
1168 | if (rc) | |
1169 | goto out_clean_proc; | |
1170 | ||
1171 | rc = cifs_init_inodecache(); | |
1172 | if (rc) | |
1173 | goto out_unreg_fscache; | |
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 | ||
1183 | #ifdef CONFIG_CIFS_UPCALL | |
1184 | rc = register_key_type(&cifs_spnego_key_type); | |
1185 | if (rc) | |
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) | |
1192 | goto out_register_key_type; | |
1193 | #endif /* CONFIG_CIFS_ACL */ | |
1194 | ||
1195 | rc = register_filesystem(&cifs_fs_type); | |
1196 | if (rc) | |
1197 | goto out_init_cifs_idmap; | |
1198 | ||
1199 | return 0; | |
1200 | ||
1201 | out_init_cifs_idmap: | |
1202 | #ifdef CONFIG_CIFS_ACL | |
1203 | exit_cifs_idmap(); | |
1204 | out_register_key_type: | |
1205 | #endif | |
1206 | #ifdef CONFIG_CIFS_UPCALL | |
1207 | unregister_key_type(&cifs_spnego_key_type); | |
1208 | out_destroy_request_bufs: | |
1209 | #endif | |
1210 | cifs_destroy_request_bufs(); | |
1211 | out_destroy_mids: | |
1212 | cifs_destroy_mids(); | |
1213 | out_destroy_inodecache: | |
1214 | cifs_destroy_inodecache(); | |
1215 | out_unreg_fscache: | |
1216 | cifs_fscache_unregister(); | |
1217 | out_clean_proc: | |
1218 | cifs_proc_clean(); | |
1219 | return rc; | |
1220 | } | |
1221 | ||
1222 | static void __exit | |
1223 | exit_cifs(void) | |
1224 | { | |
1225 | cFYI(DBG2, "exit_cifs"); | |
1226 | cifs_proc_clean(); | |
1227 | cifs_fscache_unregister(); | |
1228 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1229 | cifs_dfs_release_automount_timer(); | |
1230 | #endif | |
1231 | #ifdef CONFIG_CIFS_ACL | |
1232 | cifs_destroy_idmaptrees(); | |
1233 | exit_cifs_idmap(); | |
1234 | #endif | |
1235 | #ifdef CONFIG_CIFS_UPCALL | |
1236 | unregister_key_type(&cifs_spnego_key_type); | |
1237 | #endif | |
1238 | unregister_filesystem(&cifs_fs_type); | |
1239 | cifs_destroy_inodecache(); | |
1240 | cifs_destroy_mids(); | |
1241 | cifs_destroy_request_bufs(); | |
1242 | } | |
1243 | ||
1244 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1245 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1246 | MODULE_DESCRIPTION | |
1247 | ("VFS to access servers complying with the SNIA CIFS Specification " | |
1248 | "e.g. Samba and Windows"); | |
1249 | MODULE_VERSION(CIFS_VERSION); | |
1250 | module_init(init_cifs) | |
1251 | module_exit(exit_cifs) |