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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 <linux/namei.h>
39#include <net/ipv6.h>
40#include "cifsfs.h"
41#include "cifspdu.h"
42#define DECLARE_GLOBALS_HERE
43#include "cifsglob.h"
44#include "cifsproto.h"
45#include "cifs_debug.h"
46#include "cifs_fs_sb.h"
47#include <linux/mm.h>
48#include <linux/key-type.h>
49#include "cifs_spnego.h"
50#include "fscache.h"
51#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
52
53int cifsFYI = 0;
54int cifsERROR = 1;
55int traceSMB = 0;
56bool enable_oplocks = true;
57unsigned int linuxExtEnabled = 1;
58unsigned int lookupCacheEnabled = 1;
59unsigned int global_secflags = CIFSSEC_DEF;
60/* unsigned int ntlmv2_support = 0; */
61unsigned int sign_CIFS_PDUs = 1;
62static const struct super_operations cifs_super_ops;
63unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
64module_param(CIFSMaxBufSize, int, 0);
65MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
67unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
68module_param(cifs_min_rcv, int, 0);
69MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
70 "1 to 64");
71unsigned int cifs_min_small = 30;
72module_param(cifs_min_small, int, 0);
73MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
74 "Range: 2 to 256");
75unsigned int cifs_max_pending = CIFS_MAX_REQ;
76module_param(cifs_max_pending, int, 0444);
77MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
78 "Default: 32767 Range: 2 to 32767.");
79module_param(enable_oplocks, bool, 0644);
80MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
81 "y/Y/1");
82
83extern mempool_t *cifs_sm_req_poolp;
84extern mempool_t *cifs_req_poolp;
85extern mempool_t *cifs_mid_poolp;
86
87struct workqueue_struct *cifsiod_wq;
88
89static int
90cifs_read_super(struct super_block *sb)
91{
92 struct inode *inode;
93 struct cifs_sb_info *cifs_sb;
94 int rc = 0;
95
96 cifs_sb = CIFS_SB(sb);
97
98 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
99 sb->s_flags |= MS_POSIXACL;
100
101 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
102 sb->s_maxbytes = MAX_LFS_FILESIZE;
103 else
104 sb->s_maxbytes = MAX_NON_LFS;
105
106 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
107 sb->s_time_gran = 100;
108
109 sb->s_magic = CIFS_MAGIC_NUMBER;
110 sb->s_op = &cifs_super_ops;
111 sb->s_bdi = &cifs_sb->bdi;
112 sb->s_blocksize = CIFS_MAX_MSGSIZE;
113 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
114 inode = cifs_root_iget(sb);
115
116 if (IS_ERR(inode)) {
117 rc = PTR_ERR(inode);
118 goto out_no_root;
119 }
120
121 sb->s_root = d_make_root(inode);
122 if (!sb->s_root) {
123 rc = -ENOMEM;
124 goto out_no_root;
125 }
126
127 /* do that *after* d_make_root() - we want NULL ->d_op for root here */
128 if (cifs_sb_master_tcon(cifs_sb)->nocase)
129 sb->s_d_op = &cifs_ci_dentry_ops;
130 else
131 sb->s_d_op = &cifs_dentry_ops;
132
133#ifdef CONFIG_CIFS_NFSD_EXPORT
134 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
135 cFYI(1, "export ops supported");
136 sb->s_export_op = &cifs_export_ops;
137 }
138#endif /* CONFIG_CIFS_NFSD_EXPORT */
139
140 return 0;
141
142out_no_root:
143 cERROR(1, "cifs_read_super: get root inode failed");
144 return rc;
145}
146
147static void cifs_kill_sb(struct super_block *sb)
148{
149 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
150 kill_anon_super(sb);
151 cifs_umount(cifs_sb);
152}
153
154static int
155cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
156{
157 struct super_block *sb = dentry->d_sb;
158 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
159 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
160 int rc = -EOPNOTSUPP;
161 int xid;
162
163 xid = GetXid();
164
165 buf->f_type = CIFS_MAGIC_NUMBER;
166
167 /*
168 * PATH_MAX may be too long - it would presumably be total path,
169 * but note that some servers (includinng Samba 3) have a shorter
170 * maximum path.
171 *
172 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
173 */
174 buf->f_namelen = PATH_MAX;
175 buf->f_files = 0; /* undefined */
176 buf->f_ffree = 0; /* unlimited */
177
178 /*
179 * We could add a second check for a QFS Unix capability bit
180 */
181 if ((tcon->ses->capabilities & CAP_UNIX) &&
182 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
183 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
184
185 /*
186 * Only need to call the old QFSInfo if failed on newer one,
187 * e.g. by OS/2.
188 **/
189 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
190 rc = CIFSSMBQFSInfo(xid, tcon, buf);
191
192 /*
193 * Some old Windows servers also do not support level 103, retry with
194 * older level one if old server failed the previous call or we
195 * bypassed it because we detected that this was an older LANMAN sess
196 */
197 if (rc)
198 rc = SMBOldQFSInfo(xid, tcon, buf);
199
200 FreeXid(xid);
201 return 0;
202}
203
204static int cifs_permission(struct inode *inode, int mask)
205{
206 struct cifs_sb_info *cifs_sb;
207
208 cifs_sb = CIFS_SB(inode->i_sb);
209
210 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
211 if ((mask & MAY_EXEC) && !execute_ok(inode))
212 return -EACCES;
213 else
214 return 0;
215 } else /* file mode might have been restricted at mount time
216 on the client (above and beyond ACL on servers) for
217 servers which do not support setting and viewing mode bits,
218 so allowing client to check permissions is useful */
219 return generic_permission(inode, mask);
220}
221
222static struct kmem_cache *cifs_inode_cachep;
223static struct kmem_cache *cifs_req_cachep;
224static struct kmem_cache *cifs_mid_cachep;
225static struct kmem_cache *cifs_sm_req_cachep;
226mempool_t *cifs_sm_req_poolp;
227mempool_t *cifs_req_poolp;
228mempool_t *cifs_mid_poolp;
229
230static struct inode *
231cifs_alloc_inode(struct super_block *sb)
232{
233 struct cifsInodeInfo *cifs_inode;
234 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
235 if (!cifs_inode)
236 return NULL;
237 cifs_inode->cifsAttrs = 0x20; /* default */
238 cifs_inode->time = 0;
239 /* Until the file is open and we have gotten oplock
240 info back from the server, can not assume caching of
241 file data or metadata */
242 cifs_set_oplock_level(cifs_inode, 0);
243 cifs_inode->delete_pending = false;
244 cifs_inode->invalid_mapping = false;
245 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
246 cifs_inode->server_eof = 0;
247 cifs_inode->uniqueid = 0;
248 cifs_inode->createtime = 0;
249
250 /* Can not set i_flags here - they get immediately overwritten
251 to zero by the VFS */
252/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
253 INIT_LIST_HEAD(&cifs_inode->openFileList);
254 return &cifs_inode->vfs_inode;
255}
256
257static void cifs_i_callback(struct rcu_head *head)
258{
259 struct inode *inode = container_of(head, struct inode, i_rcu);
260 INIT_LIST_HEAD(&inode->i_dentry);
261 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
262}
263
264static void
265cifs_destroy_inode(struct inode *inode)
266{
267 call_rcu(&inode->i_rcu, cifs_i_callback);
268}
269
270static void
271cifs_evict_inode(struct inode *inode)
272{
273 truncate_inode_pages(&inode->i_data, 0);
274 clear_inode(inode);
275 cifs_fscache_release_inode_cookie(inode);
276}
277
278static void
279cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
280{
281 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
282 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
283
284 seq_printf(s, ",addr=");
285
286 switch (server->dstaddr.ss_family) {
287 case AF_INET:
288 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
289 break;
290 case AF_INET6:
291 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
292 if (sa6->sin6_scope_id)
293 seq_printf(s, "%%%u", sa6->sin6_scope_id);
294 break;
295 default:
296 seq_printf(s, "(unknown)");
297 }
298}
299
300static void
301cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
302{
303 seq_printf(s, ",sec=");
304
305 switch (server->secType) {
306 case LANMAN:
307 seq_printf(s, "lanman");
308 break;
309 case NTLMv2:
310 seq_printf(s, "ntlmv2");
311 break;
312 case NTLM:
313 seq_printf(s, "ntlm");
314 break;
315 case Kerberos:
316 seq_printf(s, "krb5");
317 break;
318 case RawNTLMSSP:
319 seq_printf(s, "ntlmssp");
320 break;
321 default:
322 /* shouldn't ever happen */
323 seq_printf(s, "unknown");
324 break;
325 }
326
327 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
328 seq_printf(s, "i");
329}
330
331static void
332cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
333{
334 seq_printf(s, ",cache=");
335
336 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
337 seq_printf(s, "strict");
338 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
339 seq_printf(s, "none");
340 else
341 seq_printf(s, "loose");
342}
343
344/*
345 * cifs_show_options() is for displaying mount options in /proc/mounts.
346 * Not all settable options are displayed but most of the important
347 * ones are.
348 */
349static int
350cifs_show_options(struct seq_file *s, struct dentry *root)
351{
352 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
353 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
354 struct sockaddr *srcaddr;
355 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
356
357 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
358 cifs_show_security(s, tcon->ses->server);
359 cifs_show_cache_flavor(s, cifs_sb);
360
361 seq_printf(s, ",unc=%s", tcon->treeName);
362
363 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
364 seq_printf(s, ",multiuser");
365 else if (tcon->ses->user_name)
366 seq_printf(s, ",username=%s", tcon->ses->user_name);
367
368 if (tcon->ses->domainName)
369 seq_printf(s, ",domain=%s", tcon->ses->domainName);
370
371 if (srcaddr->sa_family != AF_UNSPEC) {
372 struct sockaddr_in *saddr4;
373 struct sockaddr_in6 *saddr6;
374 saddr4 = (struct sockaddr_in *)srcaddr;
375 saddr6 = (struct sockaddr_in6 *)srcaddr;
376 if (srcaddr->sa_family == AF_INET6)
377 seq_printf(s, ",srcaddr=%pI6c",
378 &saddr6->sin6_addr);
379 else if (srcaddr->sa_family == AF_INET)
380 seq_printf(s, ",srcaddr=%pI4",
381 &saddr4->sin_addr.s_addr);
382 else
383 seq_printf(s, ",srcaddr=BAD-AF:%i",
384 (int)(srcaddr->sa_family));
385 }
386
387 seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
388 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
389 seq_printf(s, ",forceuid");
390 else
391 seq_printf(s, ",noforceuid");
392
393 seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
395 seq_printf(s, ",forcegid");
396 else
397 seq_printf(s, ",noforcegid");
398
399 cifs_show_address(s, tcon->ses->server);
400
401 if (!tcon->unix_ext)
402 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
403 cifs_sb->mnt_file_mode,
404 cifs_sb->mnt_dir_mode);
405 if (tcon->seal)
406 seq_printf(s, ",seal");
407 if (tcon->nocase)
408 seq_printf(s, ",nocase");
409 if (tcon->retry)
410 seq_printf(s, ",hard");
411 if (tcon->unix_ext)
412 seq_printf(s, ",unix");
413 else
414 seq_printf(s, ",nounix");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
416 seq_printf(s, ",posixpaths");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
418 seq_printf(s, ",setuids");
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
420 seq_printf(s, ",serverino");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
422 seq_printf(s, ",rwpidforward");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
424 seq_printf(s, ",forcemand");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
426 seq_printf(s, ",nouser_xattr");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
428 seq_printf(s, ",mapchars");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
430 seq_printf(s, ",sfu");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
432 seq_printf(s, ",nobrl");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
434 seq_printf(s, ",cifsacl");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
436 seq_printf(s, ",dynperm");
437 if (root->d_sb->s_flags & MS_POSIXACL)
438 seq_printf(s, ",acl");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
440 seq_printf(s, ",mfsymlinks");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
442 seq_printf(s, ",fsc");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
444 seq_printf(s, ",nostrictsync");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
446 seq_printf(s, ",noperm");
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
448 seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
450 seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
451
452 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
453 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
454 /* convert actimeo and display it in seconds */
455 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
456
457 return 0;
458}
459
460static void cifs_umount_begin(struct super_block *sb)
461{
462 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
463 struct cifs_tcon *tcon;
464
465 if (cifs_sb == NULL)
466 return;
467
468 tcon = cifs_sb_master_tcon(cifs_sb);
469
470 spin_lock(&cifs_tcp_ses_lock);
471 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
472 /* we have other mounts to same share or we have
473 already tried to force umount this and woken up
474 all waiting network requests, nothing to do */
475 spin_unlock(&cifs_tcp_ses_lock);
476 return;
477 } else if (tcon->tc_count == 1)
478 tcon->tidStatus = CifsExiting;
479 spin_unlock(&cifs_tcp_ses_lock);
480
481 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
482 /* cancel_notify_requests(tcon); */
483 if (tcon->ses && tcon->ses->server) {
484 cFYI(1, "wake up tasks now - umount begin not complete");
485 wake_up_all(&tcon->ses->server->request_q);
486 wake_up_all(&tcon->ses->server->response_q);
487 msleep(1); /* yield */
488 /* we have to kick the requests once more */
489 wake_up_all(&tcon->ses->server->response_q);
490 msleep(1);
491 }
492
493 return;
494}
495
496#ifdef CONFIG_CIFS_STATS2
497static int cifs_show_stats(struct seq_file *s, struct dentry *root)
498{
499 /* BB FIXME */
500 return 0;
501}
502#endif
503
504static int cifs_remount(struct super_block *sb, int *flags, char *data)
505{
506 *flags |= MS_NODIRATIME;
507 return 0;
508}
509
510static int cifs_drop_inode(struct inode *inode)
511{
512 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
513
514 /* no serverino => unconditional eviction */
515 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
516 generic_drop_inode(inode);
517}
518
519static const struct super_operations cifs_super_ops = {
520 .statfs = cifs_statfs,
521 .alloc_inode = cifs_alloc_inode,
522 .destroy_inode = cifs_destroy_inode,
523 .drop_inode = cifs_drop_inode,
524 .evict_inode = cifs_evict_inode,
525/* .delete_inode = cifs_delete_inode, */ /* Do not need above
526 function unless later we add lazy close of inodes or unless the
527 kernel forgets to call us with the same number of releases (closes)
528 as opens */
529 .show_options = cifs_show_options,
530 .umount_begin = cifs_umount_begin,
531 .remount_fs = cifs_remount,
532#ifdef CONFIG_CIFS_STATS2
533 .show_stats = cifs_show_stats,
534#endif
535};
536
537/*
538 * Get root dentry from superblock according to prefix path mount option.
539 * Return dentry with refcount + 1 on success and NULL otherwise.
540 */
541static struct dentry *
542cifs_get_root(struct smb_vol *vol, struct super_block *sb)
543{
544 struct dentry *dentry;
545 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
546 char *full_path = NULL;
547 char *s, *p;
548 char sep;
549
550 full_path = cifs_build_path_to_root(vol, cifs_sb,
551 cifs_sb_master_tcon(cifs_sb));
552 if (full_path == NULL)
553 return ERR_PTR(-ENOMEM);
554
555 cFYI(1, "Get root dentry for %s", full_path);
556
557 sep = CIFS_DIR_SEP(cifs_sb);
558 dentry = dget(sb->s_root);
559 p = s = full_path;
560
561 do {
562 struct inode *dir = dentry->d_inode;
563 struct dentry *child;
564
565 if (!dir) {
566 dput(dentry);
567 dentry = ERR_PTR(-ENOENT);
568 break;
569 }
570
571 /* skip separators */
572 while (*s == sep)
573 s++;
574 if (!*s)
575 break;
576 p = s++;
577 /* next separator */
578 while (*s && *s != sep)
579 s++;
580
581 mutex_lock(&dir->i_mutex);
582 child = lookup_one_len(p, dentry, s - p);
583 mutex_unlock(&dir->i_mutex);
584 dput(dentry);
585 dentry = child;
586 } while (!IS_ERR(dentry));
587 kfree(full_path);
588 return dentry;
589}
590
591static int cifs_set_super(struct super_block *sb, void *data)
592{
593 struct cifs_mnt_data *mnt_data = data;
594 sb->s_fs_info = mnt_data->cifs_sb;
595 return set_anon_super(sb, NULL);
596}
597
598static struct dentry *
599cifs_do_mount(struct file_system_type *fs_type,
600 int flags, const char *dev_name, void *data)
601{
602 int rc;
603 struct super_block *sb;
604 struct cifs_sb_info *cifs_sb;
605 struct smb_vol *volume_info;
606 struct cifs_mnt_data mnt_data;
607 struct dentry *root;
608
609 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
610
611 volume_info = cifs_get_volume_info((char *)data, dev_name);
612 if (IS_ERR(volume_info))
613 return ERR_CAST(volume_info);
614
615 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
616 if (cifs_sb == NULL) {
617 root = ERR_PTR(-ENOMEM);
618 goto out_nls;
619 }
620
621 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
622 if (cifs_sb->mountdata == NULL) {
623 root = ERR_PTR(-ENOMEM);
624 goto out_cifs_sb;
625 }
626
627 cifs_setup_cifs_sb(volume_info, cifs_sb);
628
629 rc = cifs_mount(cifs_sb, volume_info);
630 if (rc) {
631 if (!(flags & MS_SILENT))
632 cERROR(1, "cifs_mount failed w/return code = %d", rc);
633 root = ERR_PTR(rc);
634 goto out_mountdata;
635 }
636
637 mnt_data.vol = volume_info;
638 mnt_data.cifs_sb = cifs_sb;
639 mnt_data.flags = flags;
640
641 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
642 if (IS_ERR(sb)) {
643 root = ERR_CAST(sb);
644 cifs_umount(cifs_sb);
645 goto out;
646 }
647
648 if (sb->s_root) {
649 cFYI(1, "Use existing superblock");
650 cifs_umount(cifs_sb);
651 } else {
652 sb->s_flags = flags;
653 /* BB should we make this contingent on mount parm? */
654 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
655
656 rc = cifs_read_super(sb);
657 if (rc) {
658 root = ERR_PTR(rc);
659 goto out_super;
660 }
661
662 sb->s_flags |= MS_ACTIVE;
663 }
664
665 root = cifs_get_root(volume_info, sb);
666 if (IS_ERR(root))
667 goto out_super;
668
669 cFYI(1, "dentry root is: %p", root);
670 goto out;
671
672out_super:
673 deactivate_locked_super(sb);
674out:
675 cifs_cleanup_volume_info(volume_info);
676 return root;
677
678out_mountdata:
679 kfree(cifs_sb->mountdata);
680out_cifs_sb:
681 kfree(cifs_sb);
682out_nls:
683 unload_nls(volume_info->local_nls);
684 goto out;
685}
686
687static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
688 unsigned long nr_segs, loff_t pos)
689{
690 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
691 ssize_t written;
692 int rc;
693
694 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
695
696 if (CIFS_I(inode)->clientCanCacheAll)
697 return written;
698
699 rc = filemap_fdatawrite(inode->i_mapping);
700 if (rc)
701 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
702
703 return written;
704}
705
706static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
707{
708 /*
709 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
710 * the cached file length
711 */
712 if (origin != SEEK_SET && origin != SEEK_CUR) {
713 int rc;
714 struct inode *inode = file->f_path.dentry->d_inode;
715
716 /*
717 * We need to be sure that all dirty pages are written and the
718 * server has the newest file length.
719 */
720 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
721 inode->i_mapping->nrpages != 0) {
722 rc = filemap_fdatawait(inode->i_mapping);
723 if (rc) {
724 mapping_set_error(inode->i_mapping, rc);
725 return rc;
726 }
727 }
728 /*
729 * Some applications poll for the file length in this strange
730 * way so we must seek to end on non-oplocked files by
731 * setting the revalidate time to zero.
732 */
733 CIFS_I(inode)->time = 0;
734
735 rc = cifs_revalidate_file_attr(file);
736 if (rc < 0)
737 return (loff_t)rc;
738 }
739 return generic_file_llseek(file, offset, origin);
740}
741
742static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
743{
744 /* note that this is called by vfs setlease with lock_flocks held
745 to protect *lease from going away */
746 struct inode *inode = file->f_path.dentry->d_inode;
747 struct cifsFileInfo *cfile = file->private_data;
748
749 if (!(S_ISREG(inode->i_mode)))
750 return -EINVAL;
751
752 /* check if file is oplocked */
753 if (((arg == F_RDLCK) &&
754 (CIFS_I(inode)->clientCanCacheRead)) ||
755 ((arg == F_WRLCK) &&
756 (CIFS_I(inode)->clientCanCacheAll)))
757 return generic_setlease(file, arg, lease);
758 else if (tlink_tcon(cfile->tlink)->local_lease &&
759 !CIFS_I(inode)->clientCanCacheRead)
760 /* If the server claims to support oplock on this
761 file, then we still need to check oplock even
762 if the local_lease mount option is set, but there
763 are servers which do not support oplock for which
764 this mount option may be useful if the user
765 knows that the file won't be changed on the server
766 by anyone else */
767 return generic_setlease(file, arg, lease);
768 else
769 return -EAGAIN;
770}
771
772struct file_system_type cifs_fs_type = {
773 .owner = THIS_MODULE,
774 .name = "cifs",
775 .mount = cifs_do_mount,
776 .kill_sb = cifs_kill_sb,
777 /* .fs_flags */
778};
779const struct inode_operations cifs_dir_inode_ops = {
780 .create = cifs_create,
781 .lookup = cifs_lookup,
782 .getattr = cifs_getattr,
783 .unlink = cifs_unlink,
784 .link = cifs_hardlink,
785 .mkdir = cifs_mkdir,
786 .rmdir = cifs_rmdir,
787 .rename = cifs_rename,
788 .permission = cifs_permission,
789/* revalidate:cifs_revalidate, */
790 .setattr = cifs_setattr,
791 .symlink = cifs_symlink,
792 .mknod = cifs_mknod,
793#ifdef CONFIG_CIFS_XATTR
794 .setxattr = cifs_setxattr,
795 .getxattr = cifs_getxattr,
796 .listxattr = cifs_listxattr,
797 .removexattr = cifs_removexattr,
798#endif
799};
800
801const struct inode_operations cifs_file_inode_ops = {
802/* revalidate:cifs_revalidate, */
803 .setattr = cifs_setattr,
804 .getattr = cifs_getattr, /* do we need this anymore? */
805 .rename = cifs_rename,
806 .permission = cifs_permission,
807#ifdef CONFIG_CIFS_XATTR
808 .setxattr = cifs_setxattr,
809 .getxattr = cifs_getxattr,
810 .listxattr = cifs_listxattr,
811 .removexattr = cifs_removexattr,
812#endif
813};
814
815const struct inode_operations cifs_symlink_inode_ops = {
816 .readlink = generic_readlink,
817 .follow_link = cifs_follow_link,
818 .put_link = cifs_put_link,
819 .permission = cifs_permission,
820 /* BB add the following two eventually */
821 /* revalidate: cifs_revalidate,
822 setattr: cifs_notify_change, *//* BB do we need notify change */
823#ifdef CONFIG_CIFS_XATTR
824 .setxattr = cifs_setxattr,
825 .getxattr = cifs_getxattr,
826 .listxattr = cifs_listxattr,
827 .removexattr = cifs_removexattr,
828#endif
829};
830
831const struct file_operations cifs_file_ops = {
832 .read = do_sync_read,
833 .write = do_sync_write,
834 .aio_read = generic_file_aio_read,
835 .aio_write = cifs_file_aio_write,
836 .open = cifs_open,
837 .release = cifs_close,
838 .lock = cifs_lock,
839 .fsync = cifs_fsync,
840 .flush = cifs_flush,
841 .mmap = cifs_file_mmap,
842 .splice_read = generic_file_splice_read,
843 .llseek = cifs_llseek,
844#ifdef CONFIG_CIFS_POSIX
845 .unlocked_ioctl = cifs_ioctl,
846#endif /* CONFIG_CIFS_POSIX */
847 .setlease = cifs_setlease,
848};
849
850const struct file_operations cifs_file_strict_ops = {
851 .read = do_sync_read,
852 .write = do_sync_write,
853 .aio_read = cifs_strict_readv,
854 .aio_write = cifs_strict_writev,
855 .open = cifs_open,
856 .release = cifs_close,
857 .lock = cifs_lock,
858 .fsync = cifs_strict_fsync,
859 .flush = cifs_flush,
860 .mmap = cifs_file_strict_mmap,
861 .splice_read = generic_file_splice_read,
862 .llseek = cifs_llseek,
863#ifdef CONFIG_CIFS_POSIX
864 .unlocked_ioctl = cifs_ioctl,
865#endif /* CONFIG_CIFS_POSIX */
866 .setlease = cifs_setlease,
867};
868
869const struct file_operations cifs_file_direct_ops = {
870 /* BB reevaluate whether they can be done with directio, no cache */
871 .read = do_sync_read,
872 .write = do_sync_write,
873 .aio_read = cifs_user_readv,
874 .aio_write = cifs_user_writev,
875 .open = cifs_open,
876 .release = cifs_close,
877 .lock = cifs_lock,
878 .fsync = cifs_fsync,
879 .flush = cifs_flush,
880 .mmap = cifs_file_mmap,
881 .splice_read = generic_file_splice_read,
882#ifdef CONFIG_CIFS_POSIX
883 .unlocked_ioctl = cifs_ioctl,
884#endif /* CONFIG_CIFS_POSIX */
885 .llseek = cifs_llseek,
886 .setlease = cifs_setlease,
887};
888
889const struct file_operations cifs_file_nobrl_ops = {
890 .read = do_sync_read,
891 .write = do_sync_write,
892 .aio_read = generic_file_aio_read,
893 .aio_write = cifs_file_aio_write,
894 .open = cifs_open,
895 .release = cifs_close,
896 .fsync = cifs_fsync,
897 .flush = cifs_flush,
898 .mmap = cifs_file_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
907const struct file_operations cifs_file_strict_nobrl_ops = {
908 .read = do_sync_read,
909 .write = do_sync_write,
910 .aio_read = cifs_strict_readv,
911 .aio_write = cifs_strict_writev,
912 .open = cifs_open,
913 .release = cifs_close,
914 .fsync = cifs_strict_fsync,
915 .flush = cifs_flush,
916 .mmap = cifs_file_strict_mmap,
917 .splice_read = generic_file_splice_read,
918 .llseek = cifs_llseek,
919#ifdef CONFIG_CIFS_POSIX
920 .unlocked_ioctl = cifs_ioctl,
921#endif /* CONFIG_CIFS_POSIX */
922 .setlease = cifs_setlease,
923};
924
925const struct file_operations cifs_file_direct_nobrl_ops = {
926 /* BB reevaluate whether they can be done with directio, no cache */
927 .read = do_sync_read,
928 .write = do_sync_write,
929 .aio_read = cifs_user_readv,
930 .aio_write = cifs_user_writev,
931 .open = cifs_open,
932 .release = cifs_close,
933 .fsync = cifs_fsync,
934 .flush = cifs_flush,
935 .mmap = cifs_file_mmap,
936 .splice_read = generic_file_splice_read,
937#ifdef CONFIG_CIFS_POSIX
938 .unlocked_ioctl = cifs_ioctl,
939#endif /* CONFIG_CIFS_POSIX */
940 .llseek = cifs_llseek,
941 .setlease = cifs_setlease,
942};
943
944const struct file_operations cifs_dir_ops = {
945 .readdir = cifs_readdir,
946 .release = cifs_closedir,
947 .read = generic_read_dir,
948 .unlocked_ioctl = cifs_ioctl,
949 .llseek = generic_file_llseek,
950};
951
952static void
953cifs_init_once(void *inode)
954{
955 struct cifsInodeInfo *cifsi = inode;
956
957 inode_init_once(&cifsi->vfs_inode);
958 mutex_init(&cifsi->lock_mutex);
959}
960
961static int
962cifs_init_inodecache(void)
963{
964 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
965 sizeof(struct cifsInodeInfo),
966 0, (SLAB_RECLAIM_ACCOUNT|
967 SLAB_MEM_SPREAD),
968 cifs_init_once);
969 if (cifs_inode_cachep == NULL)
970 return -ENOMEM;
971
972 return 0;
973}
974
975static void
976cifs_destroy_inodecache(void)
977{
978 kmem_cache_destroy(cifs_inode_cachep);
979}
980
981static int
982cifs_init_request_bufs(void)
983{
984 if (CIFSMaxBufSize < 8192) {
985 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
986 Unicode path name has to fit in any SMB/CIFS path based frames */
987 CIFSMaxBufSize = 8192;
988 } else if (CIFSMaxBufSize > 1024*127) {
989 CIFSMaxBufSize = 1024 * 127;
990 } else {
991 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
992 }
993/* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
994 cifs_req_cachep = kmem_cache_create("cifs_request",
995 CIFSMaxBufSize +
996 MAX_CIFS_HDR_SIZE, 0,
997 SLAB_HWCACHE_ALIGN, NULL);
998 if (cifs_req_cachep == NULL)
999 return -ENOMEM;
1000
1001 if (cifs_min_rcv < 1)
1002 cifs_min_rcv = 1;
1003 else if (cifs_min_rcv > 64) {
1004 cifs_min_rcv = 64;
1005 cERROR(1, "cifs_min_rcv set to maximum (64)");
1006 }
1007
1008 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1009 cifs_req_cachep);
1010
1011 if (cifs_req_poolp == NULL) {
1012 kmem_cache_destroy(cifs_req_cachep);
1013 return -ENOMEM;
1014 }
1015 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1016 almost all handle based requests (but not write response, nor is it
1017 sufficient for path based requests). A smaller size would have
1018 been more efficient (compacting multiple slab items on one 4k page)
1019 for the case in which debug was on, but this larger size allows
1020 more SMBs to use small buffer alloc and is still much more
1021 efficient to alloc 1 per page off the slab compared to 17K (5page)
1022 alloc of large cifs buffers even when page debugging is on */
1023 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1024 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1025 NULL);
1026 if (cifs_sm_req_cachep == NULL) {
1027 mempool_destroy(cifs_req_poolp);
1028 kmem_cache_destroy(cifs_req_cachep);
1029 return -ENOMEM;
1030 }
1031
1032 if (cifs_min_small < 2)
1033 cifs_min_small = 2;
1034 else if (cifs_min_small > 256) {
1035 cifs_min_small = 256;
1036 cFYI(1, "cifs_min_small set to maximum (256)");
1037 }
1038
1039 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1040 cifs_sm_req_cachep);
1041
1042 if (cifs_sm_req_poolp == NULL) {
1043 mempool_destroy(cifs_req_poolp);
1044 kmem_cache_destroy(cifs_req_cachep);
1045 kmem_cache_destroy(cifs_sm_req_cachep);
1046 return -ENOMEM;
1047 }
1048
1049 return 0;
1050}
1051
1052static void
1053cifs_destroy_request_bufs(void)
1054{
1055 mempool_destroy(cifs_req_poolp);
1056 kmem_cache_destroy(cifs_req_cachep);
1057 mempool_destroy(cifs_sm_req_poolp);
1058 kmem_cache_destroy(cifs_sm_req_cachep);
1059}
1060
1061static int
1062cifs_init_mids(void)
1063{
1064 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1065 sizeof(struct mid_q_entry), 0,
1066 SLAB_HWCACHE_ALIGN, NULL);
1067 if (cifs_mid_cachep == NULL)
1068 return -ENOMEM;
1069
1070 /* 3 is a reasonable minimum number of simultaneous operations */
1071 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1072 if (cifs_mid_poolp == NULL) {
1073 kmem_cache_destroy(cifs_mid_cachep);
1074 return -ENOMEM;
1075 }
1076
1077 return 0;
1078}
1079
1080static void
1081cifs_destroy_mids(void)
1082{
1083 mempool_destroy(cifs_mid_poolp);
1084 kmem_cache_destroy(cifs_mid_cachep);
1085}
1086
1087static int __init
1088init_cifs(void)
1089{
1090 int rc = 0;
1091 cifs_proc_init();
1092 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1093#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1094 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1095 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1096#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1097/*
1098 * Initialize Global counters
1099 */
1100 atomic_set(&sesInfoAllocCount, 0);
1101 atomic_set(&tconInfoAllocCount, 0);
1102 atomic_set(&tcpSesAllocCount, 0);
1103 atomic_set(&tcpSesReconnectCount, 0);
1104 atomic_set(&tconInfoReconnectCount, 0);
1105
1106 atomic_set(&bufAllocCount, 0);
1107 atomic_set(&smBufAllocCount, 0);
1108#ifdef CONFIG_CIFS_STATS2
1109 atomic_set(&totBufAllocCount, 0);
1110 atomic_set(&totSmBufAllocCount, 0);
1111#endif /* CONFIG_CIFS_STATS2 */
1112
1113 atomic_set(&midCount, 0);
1114 GlobalCurrentXid = 0;
1115 GlobalTotalActiveXid = 0;
1116 GlobalMaxActiveXid = 0;
1117 spin_lock_init(&cifs_tcp_ses_lock);
1118 spin_lock_init(&cifs_file_list_lock);
1119 spin_lock_init(&GlobalMid_Lock);
1120
1121 if (cifs_max_pending < 2) {
1122 cifs_max_pending = 2;
1123 cFYI(1, "cifs_max_pending set to min of 2");
1124 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1125 cifs_max_pending = CIFS_MAX_REQ;
1126 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1127 }
1128
1129 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1130 if (!cifsiod_wq) {
1131 rc = -ENOMEM;
1132 goto out_clean_proc;
1133 }
1134
1135 rc = cifs_fscache_register();
1136 if (rc)
1137 goto out_destroy_wq;
1138
1139 rc = cifs_init_inodecache();
1140 if (rc)
1141 goto out_unreg_fscache;
1142
1143 rc = cifs_init_mids();
1144 if (rc)
1145 goto out_destroy_inodecache;
1146
1147 rc = cifs_init_request_bufs();
1148 if (rc)
1149 goto out_destroy_mids;
1150
1151#ifdef CONFIG_CIFS_UPCALL
1152 rc = register_key_type(&cifs_spnego_key_type);
1153 if (rc)
1154 goto out_destroy_request_bufs;
1155#endif /* CONFIG_CIFS_UPCALL */
1156
1157#ifdef CONFIG_CIFS_ACL
1158 rc = init_cifs_idmap();
1159 if (rc)
1160 goto out_register_key_type;
1161#endif /* CONFIG_CIFS_ACL */
1162
1163 rc = register_filesystem(&cifs_fs_type);
1164 if (rc)
1165 goto out_init_cifs_idmap;
1166
1167 return 0;
1168
1169out_init_cifs_idmap:
1170#ifdef CONFIG_CIFS_ACL
1171 exit_cifs_idmap();
1172out_register_key_type:
1173#endif
1174#ifdef CONFIG_CIFS_UPCALL
1175 unregister_key_type(&cifs_spnego_key_type);
1176out_destroy_request_bufs:
1177#endif
1178 cifs_destroy_request_bufs();
1179out_destroy_mids:
1180 cifs_destroy_mids();
1181out_destroy_inodecache:
1182 cifs_destroy_inodecache();
1183out_unreg_fscache:
1184 cifs_fscache_unregister();
1185out_destroy_wq:
1186 destroy_workqueue(cifsiod_wq);
1187out_clean_proc:
1188 cifs_proc_clean();
1189 return rc;
1190}
1191
1192static void __exit
1193exit_cifs(void)
1194{
1195 cFYI(DBG2, "exit_cifs");
1196 unregister_filesystem(&cifs_fs_type);
1197 cifs_dfs_release_automount_timer();
1198#ifdef CONFIG_CIFS_ACL
1199 cifs_destroy_idmaptrees();
1200 exit_cifs_idmap();
1201#endif
1202#ifdef CONFIG_CIFS_UPCALL
1203 unregister_key_type(&cifs_spnego_key_type);
1204#endif
1205 cifs_destroy_request_bufs();
1206 cifs_destroy_mids();
1207 cifs_destroy_inodecache();
1208 cifs_fscache_unregister();
1209 destroy_workqueue(cifsiod_wq);
1210 cifs_proc_clean();
1211}
1212
1213MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1214MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1215MODULE_DESCRIPTION
1216 ("VFS to access servers complying with the SNIA CIFS Specification "
1217 "e.g. Samba and Windows");
1218MODULE_VERSION(CIFS_VERSION);
1219module_init(init_cifs)
1220module_exit(exit_cifs)
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 <linux/namei.h>
39#include <linux/random.h>
40#include <linux/uuid.h>
41#include <linux/xattr.h>
42#include <net/ipv6.h>
43#include "cifsfs.h"
44#include "cifspdu.h"
45#define DECLARE_GLOBALS_HERE
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_debug.h"
49#include "cifs_fs_sb.h"
50#include <linux/mm.h>
51#include <linux/key-type.h>
52#include "cifs_spnego.h"
53#include "fscache.h"
54#include "smb2pdu.h"
55
56int cifsFYI = 0;
57bool traceSMB;
58bool enable_oplocks = true;
59bool linuxExtEnabled = true;
60bool lookupCacheEnabled = true;
61unsigned int global_secflags = CIFSSEC_DEF;
62/* unsigned int ntlmv2_support = 0; */
63unsigned int sign_CIFS_PDUs = 1;
64static const struct super_operations cifs_super_ops;
65unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
66module_param(CIFSMaxBufSize, uint, 0444);
67MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
68 "Default: 16384 Range: 8192 to 130048");
69unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
70module_param(cifs_min_rcv, uint, 0444);
71MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
72 "1 to 64");
73unsigned int cifs_min_small = 30;
74module_param(cifs_min_small, uint, 0444);
75MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
76 "Range: 2 to 256");
77unsigned int cifs_max_pending = CIFS_MAX_REQ;
78module_param(cifs_max_pending, uint, 0444);
79MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
80 "Default: 32767 Range: 2 to 32767.");
81module_param(enable_oplocks, bool, 0644);
82MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
83
84extern mempool_t *cifs_sm_req_poolp;
85extern mempool_t *cifs_req_poolp;
86extern mempool_t *cifs_mid_poolp;
87
88struct workqueue_struct *cifsiod_wq;
89struct workqueue_struct *cifsoplockd_wq;
90__u32 cifs_lock_secret;
91
92/*
93 * Bumps refcount for cifs super block.
94 * Note that it should be only called if a referece to VFS super block is
95 * already held, e.g. in open-type syscalls context. Otherwise it can race with
96 * atomic_dec_and_test in deactivate_locked_super.
97 */
98void
99cifs_sb_active(struct super_block *sb)
100{
101 struct cifs_sb_info *server = CIFS_SB(sb);
102
103 if (atomic_inc_return(&server->active) == 1)
104 atomic_inc(&sb->s_active);
105}
106
107void
108cifs_sb_deactive(struct super_block *sb)
109{
110 struct cifs_sb_info *server = CIFS_SB(sb);
111
112 if (atomic_dec_and_test(&server->active))
113 deactivate_super(sb);
114}
115
116static int
117cifs_read_super(struct super_block *sb)
118{
119 struct inode *inode;
120 struct cifs_sb_info *cifs_sb;
121 struct cifs_tcon *tcon;
122 int rc = 0;
123
124 cifs_sb = CIFS_SB(sb);
125 tcon = cifs_sb_master_tcon(cifs_sb);
126
127 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
128 sb->s_flags |= SB_POSIXACL;
129
130 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
131 sb->s_maxbytes = MAX_LFS_FILESIZE;
132 else
133 sb->s_maxbytes = MAX_NON_LFS;
134
135 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
136 sb->s_time_gran = 100;
137
138 sb->s_magic = CIFS_MAGIC_NUMBER;
139 sb->s_op = &cifs_super_ops;
140 sb->s_xattr = cifs_xattr_handlers;
141 rc = super_setup_bdi(sb);
142 if (rc)
143 goto out_no_root;
144 /* tune readahead according to rsize */
145 sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
146
147 sb->s_blocksize = CIFS_MAX_MSGSIZE;
148 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
149 inode = cifs_root_iget(sb);
150
151 if (IS_ERR(inode)) {
152 rc = PTR_ERR(inode);
153 goto out_no_root;
154 }
155
156 if (tcon->nocase)
157 sb->s_d_op = &cifs_ci_dentry_ops;
158 else
159 sb->s_d_op = &cifs_dentry_ops;
160
161 sb->s_root = d_make_root(inode);
162 if (!sb->s_root) {
163 rc = -ENOMEM;
164 goto out_no_root;
165 }
166
167#ifdef CONFIG_CIFS_NFSD_EXPORT
168 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
169 cifs_dbg(FYI, "export ops supported\n");
170 sb->s_export_op = &cifs_export_ops;
171 }
172#endif /* CONFIG_CIFS_NFSD_EXPORT */
173
174 return 0;
175
176out_no_root:
177 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
178 return rc;
179}
180
181static void cifs_kill_sb(struct super_block *sb)
182{
183 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
184 kill_anon_super(sb);
185 cifs_umount(cifs_sb);
186}
187
188static int
189cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
190{
191 struct super_block *sb = dentry->d_sb;
192 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
193 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
194 struct TCP_Server_Info *server = tcon->ses->server;
195 unsigned int xid;
196 int rc = 0;
197
198 xid = get_xid();
199
200 /*
201 * PATH_MAX may be too long - it would presumably be total path,
202 * but note that some servers (includinng Samba 3) have a shorter
203 * maximum path.
204 *
205 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
206 */
207 buf->f_namelen = PATH_MAX;
208 buf->f_files = 0; /* undefined */
209 buf->f_ffree = 0; /* unlimited */
210
211 if (server->ops->queryfs)
212 rc = server->ops->queryfs(xid, tcon, buf);
213
214 free_xid(xid);
215 return 0;
216}
217
218static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
219{
220 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
221 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
222 struct TCP_Server_Info *server = tcon->ses->server;
223
224 if (server->ops->fallocate)
225 return server->ops->fallocate(file, tcon, mode, off, len);
226
227 return -EOPNOTSUPP;
228}
229
230static int cifs_permission(struct inode *inode, int mask)
231{
232 struct cifs_sb_info *cifs_sb;
233
234 cifs_sb = CIFS_SB(inode->i_sb);
235
236 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
237 if ((mask & MAY_EXEC) && !execute_ok(inode))
238 return -EACCES;
239 else
240 return 0;
241 } else /* file mode might have been restricted at mount time
242 on the client (above and beyond ACL on servers) for
243 servers which do not support setting and viewing mode bits,
244 so allowing client to check permissions is useful */
245 return generic_permission(inode, mask);
246}
247
248static struct kmem_cache *cifs_inode_cachep;
249static struct kmem_cache *cifs_req_cachep;
250static struct kmem_cache *cifs_mid_cachep;
251static struct kmem_cache *cifs_sm_req_cachep;
252mempool_t *cifs_sm_req_poolp;
253mempool_t *cifs_req_poolp;
254mempool_t *cifs_mid_poolp;
255
256static struct inode *
257cifs_alloc_inode(struct super_block *sb)
258{
259 struct cifsInodeInfo *cifs_inode;
260 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
261 if (!cifs_inode)
262 return NULL;
263 cifs_inode->cifsAttrs = 0x20; /* default */
264 cifs_inode->time = 0;
265 /*
266 * Until the file is open and we have gotten oplock info back from the
267 * server, can not assume caching of file data or metadata.
268 */
269 cifs_set_oplock_level(cifs_inode, 0);
270 cifs_inode->flags = 0;
271 spin_lock_init(&cifs_inode->writers_lock);
272 cifs_inode->writers = 0;
273 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
274 cifs_inode->server_eof = 0;
275 cifs_inode->uniqueid = 0;
276 cifs_inode->createtime = 0;
277 cifs_inode->epoch = 0;
278 generate_random_uuid(cifs_inode->lease_key);
279
280 /*
281 * Can not set i_flags here - they get immediately overwritten to zero
282 * by the VFS.
283 */
284 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
285 INIT_LIST_HEAD(&cifs_inode->openFileList);
286 INIT_LIST_HEAD(&cifs_inode->llist);
287 return &cifs_inode->vfs_inode;
288}
289
290static void cifs_i_callback(struct rcu_head *head)
291{
292 struct inode *inode = container_of(head, struct inode, i_rcu);
293 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
294}
295
296static void
297cifs_destroy_inode(struct inode *inode)
298{
299 call_rcu(&inode->i_rcu, cifs_i_callback);
300}
301
302static void
303cifs_evict_inode(struct inode *inode)
304{
305 truncate_inode_pages_final(&inode->i_data);
306 clear_inode(inode);
307 cifs_fscache_release_inode_cookie(inode);
308}
309
310static void
311cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
312{
313 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
314 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
315
316 seq_puts(s, ",addr=");
317
318 switch (server->dstaddr.ss_family) {
319 case AF_INET:
320 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
321 break;
322 case AF_INET6:
323 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
324 if (sa6->sin6_scope_id)
325 seq_printf(s, "%%%u", sa6->sin6_scope_id);
326 break;
327 default:
328 seq_puts(s, "(unknown)");
329 }
330 if (server->rdma)
331 seq_puts(s, ",rdma");
332}
333
334static void
335cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
336{
337 if (ses->sectype == Unspecified) {
338 if (ses->user_name == NULL)
339 seq_puts(s, ",sec=none");
340 return;
341 }
342
343 seq_puts(s, ",sec=");
344
345 switch (ses->sectype) {
346 case LANMAN:
347 seq_puts(s, "lanman");
348 break;
349 case NTLMv2:
350 seq_puts(s, "ntlmv2");
351 break;
352 case NTLM:
353 seq_puts(s, "ntlm");
354 break;
355 case Kerberos:
356 seq_puts(s, "krb5");
357 break;
358 case RawNTLMSSP:
359 seq_puts(s, "ntlmssp");
360 break;
361 default:
362 /* shouldn't ever happen */
363 seq_puts(s, "unknown");
364 break;
365 }
366
367 if (ses->sign)
368 seq_puts(s, "i");
369}
370
371static void
372cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
373{
374 seq_puts(s, ",cache=");
375
376 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
377 seq_puts(s, "strict");
378 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
379 seq_puts(s, "none");
380 else
381 seq_puts(s, "loose");
382}
383
384static void
385cifs_show_nls(struct seq_file *s, struct nls_table *cur)
386{
387 struct nls_table *def;
388
389 /* Display iocharset= option if it's not default charset */
390 def = load_nls_default();
391 if (def != cur)
392 seq_printf(s, ",iocharset=%s", cur->charset);
393 unload_nls(def);
394}
395
396/*
397 * cifs_show_options() is for displaying mount options in /proc/mounts.
398 * Not all settable options are displayed but most of the important
399 * ones are.
400 */
401static int
402cifs_show_options(struct seq_file *s, struct dentry *root)
403{
404 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
405 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
406 struct sockaddr *srcaddr;
407 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
408
409 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
410 cifs_show_security(s, tcon->ses);
411 cifs_show_cache_flavor(s, cifs_sb);
412
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
414 seq_puts(s, ",multiuser");
415 else if (tcon->ses->user_name)
416 seq_show_option(s, "username", tcon->ses->user_name);
417
418 if (tcon->ses->domainName)
419 seq_show_option(s, "domain", tcon->ses->domainName);
420
421 if (srcaddr->sa_family != AF_UNSPEC) {
422 struct sockaddr_in *saddr4;
423 struct sockaddr_in6 *saddr6;
424 saddr4 = (struct sockaddr_in *)srcaddr;
425 saddr6 = (struct sockaddr_in6 *)srcaddr;
426 if (srcaddr->sa_family == AF_INET6)
427 seq_printf(s, ",srcaddr=%pI6c",
428 &saddr6->sin6_addr);
429 else if (srcaddr->sa_family == AF_INET)
430 seq_printf(s, ",srcaddr=%pI4",
431 &saddr4->sin_addr.s_addr);
432 else
433 seq_printf(s, ",srcaddr=BAD-AF:%i",
434 (int)(srcaddr->sa_family));
435 }
436
437 seq_printf(s, ",uid=%u",
438 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
440 seq_puts(s, ",forceuid");
441 else
442 seq_puts(s, ",noforceuid");
443
444 seq_printf(s, ",gid=%u",
445 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
447 seq_puts(s, ",forcegid");
448 else
449 seq_puts(s, ",noforcegid");
450
451 cifs_show_address(s, tcon->ses->server);
452
453 if (!tcon->unix_ext)
454 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
455 cifs_sb->mnt_file_mode,
456 cifs_sb->mnt_dir_mode);
457
458 cifs_show_nls(s, cifs_sb->local_nls);
459
460 if (tcon->seal)
461 seq_puts(s, ",seal");
462 if (tcon->nocase)
463 seq_puts(s, ",nocase");
464 if (tcon->retry)
465 seq_puts(s, ",hard");
466 else
467 seq_puts(s, ",soft");
468 if (tcon->use_persistent)
469 seq_puts(s, ",persistenthandles");
470 else if (tcon->use_resilient)
471 seq_puts(s, ",resilienthandles");
472 if (tcon->unix_ext)
473 seq_puts(s, ",unix");
474 else
475 seq_puts(s, ",nounix");
476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
477 seq_puts(s, ",posixpaths");
478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
479 seq_puts(s, ",setuids");
480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
481 seq_puts(s, ",idsfromsid");
482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
483 seq_puts(s, ",serverino");
484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
485 seq_puts(s, ",rwpidforward");
486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
487 seq_puts(s, ",forcemand");
488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
489 seq_puts(s, ",nouser_xattr");
490 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
491 seq_puts(s, ",mapchars");
492 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
493 seq_puts(s, ",mapposix");
494 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
495 seq_puts(s, ",sfu");
496 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
497 seq_puts(s, ",nobrl");
498 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
499 seq_puts(s, ",cifsacl");
500 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
501 seq_puts(s, ",dynperm");
502 if (root->d_sb->s_flags & SB_POSIXACL)
503 seq_puts(s, ",acl");
504 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
505 seq_puts(s, ",mfsymlinks");
506 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
507 seq_puts(s, ",fsc");
508 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
509 seq_puts(s, ",nostrictsync");
510 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
511 seq_puts(s, ",noperm");
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
513 seq_printf(s, ",backupuid=%u",
514 from_kuid_munged(&init_user_ns,
515 cifs_sb->mnt_backupuid));
516 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
517 seq_printf(s, ",backupgid=%u",
518 from_kgid_munged(&init_user_ns,
519 cifs_sb->mnt_backupgid));
520
521 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
522 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
523 seq_printf(s, ",echo_interval=%lu",
524 tcon->ses->server->echo_interval / HZ);
525 /* convert actimeo and display it in seconds */
526 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
527
528 return 0;
529}
530
531static void cifs_umount_begin(struct super_block *sb)
532{
533 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
534 struct cifs_tcon *tcon;
535
536 if (cifs_sb == NULL)
537 return;
538
539 tcon = cifs_sb_master_tcon(cifs_sb);
540
541 spin_lock(&cifs_tcp_ses_lock);
542 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
543 /* we have other mounts to same share or we have
544 already tried to force umount this and woken up
545 all waiting network requests, nothing to do */
546 spin_unlock(&cifs_tcp_ses_lock);
547 return;
548 } else if (tcon->tc_count == 1)
549 tcon->tidStatus = CifsExiting;
550 spin_unlock(&cifs_tcp_ses_lock);
551
552 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
553 /* cancel_notify_requests(tcon); */
554 if (tcon->ses && tcon->ses->server) {
555 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
556 wake_up_all(&tcon->ses->server->request_q);
557 wake_up_all(&tcon->ses->server->response_q);
558 msleep(1); /* yield */
559 /* we have to kick the requests once more */
560 wake_up_all(&tcon->ses->server->response_q);
561 msleep(1);
562 }
563
564 return;
565}
566
567#ifdef CONFIG_CIFS_STATS2
568static int cifs_show_stats(struct seq_file *s, struct dentry *root)
569{
570 /* BB FIXME */
571 return 0;
572}
573#endif
574
575static int cifs_remount(struct super_block *sb, int *flags, char *data)
576{
577 sync_filesystem(sb);
578 *flags |= SB_NODIRATIME;
579 return 0;
580}
581
582static int cifs_drop_inode(struct inode *inode)
583{
584 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
585
586 /* no serverino => unconditional eviction */
587 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
588 generic_drop_inode(inode);
589}
590
591static const struct super_operations cifs_super_ops = {
592 .statfs = cifs_statfs,
593 .alloc_inode = cifs_alloc_inode,
594 .destroy_inode = cifs_destroy_inode,
595 .drop_inode = cifs_drop_inode,
596 .evict_inode = cifs_evict_inode,
597/* .delete_inode = cifs_delete_inode, */ /* Do not need above
598 function unless later we add lazy close of inodes or unless the
599 kernel forgets to call us with the same number of releases (closes)
600 as opens */
601 .show_options = cifs_show_options,
602 .umount_begin = cifs_umount_begin,
603 .remount_fs = cifs_remount,
604#ifdef CONFIG_CIFS_STATS2
605 .show_stats = cifs_show_stats,
606#endif
607};
608
609/*
610 * Get root dentry from superblock according to prefix path mount option.
611 * Return dentry with refcount + 1 on success and NULL otherwise.
612 */
613static struct dentry *
614cifs_get_root(struct smb_vol *vol, struct super_block *sb)
615{
616 struct dentry *dentry;
617 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
618 char *full_path = NULL;
619 char *s, *p;
620 char sep;
621
622 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
623 return dget(sb->s_root);
624
625 full_path = cifs_build_path_to_root(vol, cifs_sb,
626 cifs_sb_master_tcon(cifs_sb), 0);
627 if (full_path == NULL)
628 return ERR_PTR(-ENOMEM);
629
630 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
631
632 sep = CIFS_DIR_SEP(cifs_sb);
633 dentry = dget(sb->s_root);
634 p = s = full_path;
635
636 do {
637 struct inode *dir = d_inode(dentry);
638 struct dentry *child;
639
640 if (!dir) {
641 dput(dentry);
642 dentry = ERR_PTR(-ENOENT);
643 break;
644 }
645 if (!S_ISDIR(dir->i_mode)) {
646 dput(dentry);
647 dentry = ERR_PTR(-ENOTDIR);
648 break;
649 }
650
651 /* skip separators */
652 while (*s == sep)
653 s++;
654 if (!*s)
655 break;
656 p = s++;
657 /* next separator */
658 while (*s && *s != sep)
659 s++;
660
661 child = lookup_one_len_unlocked(p, dentry, s - p);
662 dput(dentry);
663 dentry = child;
664 } while (!IS_ERR(dentry));
665 kfree(full_path);
666 return dentry;
667}
668
669static int cifs_set_super(struct super_block *sb, void *data)
670{
671 struct cifs_mnt_data *mnt_data = data;
672 sb->s_fs_info = mnt_data->cifs_sb;
673 return set_anon_super(sb, NULL);
674}
675
676static struct dentry *
677cifs_do_mount(struct file_system_type *fs_type,
678 int flags, const char *dev_name, void *data)
679{
680 int rc;
681 struct super_block *sb;
682 struct cifs_sb_info *cifs_sb;
683 struct smb_vol *volume_info;
684 struct cifs_mnt_data mnt_data;
685 struct dentry *root;
686
687 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
688
689 volume_info = cifs_get_volume_info((char *)data, dev_name);
690 if (IS_ERR(volume_info))
691 return ERR_CAST(volume_info);
692
693 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
694 if (cifs_sb == NULL) {
695 root = ERR_PTR(-ENOMEM);
696 goto out_nls;
697 }
698
699 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
700 if (cifs_sb->mountdata == NULL) {
701 root = ERR_PTR(-ENOMEM);
702 goto out_free;
703 }
704
705 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
706 if (rc) {
707 root = ERR_PTR(rc);
708 goto out_free;
709 }
710
711 rc = cifs_mount(cifs_sb, volume_info);
712 if (rc) {
713 if (!(flags & SB_SILENT))
714 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
715 rc);
716 root = ERR_PTR(rc);
717 goto out_free;
718 }
719
720 mnt_data.vol = volume_info;
721 mnt_data.cifs_sb = cifs_sb;
722 mnt_data.flags = flags;
723
724 /* BB should we make this contingent on mount parm? */
725 flags |= SB_NODIRATIME | SB_NOATIME;
726
727 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
728 if (IS_ERR(sb)) {
729 root = ERR_CAST(sb);
730 cifs_umount(cifs_sb);
731 goto out;
732 }
733
734 if (sb->s_root) {
735 cifs_dbg(FYI, "Use existing superblock\n");
736 cifs_umount(cifs_sb);
737 } else {
738 rc = cifs_read_super(sb);
739 if (rc) {
740 root = ERR_PTR(rc);
741 goto out_super;
742 }
743
744 sb->s_flags |= SB_ACTIVE;
745 }
746
747 root = cifs_get_root(volume_info, sb);
748 if (IS_ERR(root))
749 goto out_super;
750
751 cifs_dbg(FYI, "dentry root is: %p\n", root);
752 goto out;
753
754out_super:
755 deactivate_locked_super(sb);
756out:
757 cifs_cleanup_volume_info(volume_info);
758 return root;
759
760out_free:
761 kfree(cifs_sb->prepath);
762 kfree(cifs_sb->mountdata);
763 kfree(cifs_sb);
764out_nls:
765 unload_nls(volume_info->local_nls);
766 goto out;
767}
768
769static ssize_t
770cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
771{
772 ssize_t rc;
773 struct inode *inode = file_inode(iocb->ki_filp);
774
775 if (iocb->ki_filp->f_flags & O_DIRECT)
776 return cifs_user_readv(iocb, iter);
777
778 rc = cifs_revalidate_mapping(inode);
779 if (rc)
780 return rc;
781
782 return generic_file_read_iter(iocb, iter);
783}
784
785static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
786{
787 struct inode *inode = file_inode(iocb->ki_filp);
788 struct cifsInodeInfo *cinode = CIFS_I(inode);
789 ssize_t written;
790 int rc;
791
792 if (iocb->ki_filp->f_flags & O_DIRECT) {
793 written = cifs_user_writev(iocb, from);
794 if (written > 0 && CIFS_CACHE_READ(cinode)) {
795 cifs_zap_mapping(inode);
796 cifs_dbg(FYI,
797 "Set no oplock for inode=%p after a write operation\n",
798 inode);
799 cinode->oplock = 0;
800 }
801 return written;
802 }
803
804 written = cifs_get_writer(cinode);
805 if (written)
806 return written;
807
808 written = generic_file_write_iter(iocb, from);
809
810 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
811 goto out;
812
813 rc = filemap_fdatawrite(inode->i_mapping);
814 if (rc)
815 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
816 rc, inode);
817
818out:
819 cifs_put_writer(cinode);
820 return written;
821}
822
823static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
824{
825 /*
826 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
827 * the cached file length
828 */
829 if (whence != SEEK_SET && whence != SEEK_CUR) {
830 int rc;
831 struct inode *inode = file_inode(file);
832
833 /*
834 * We need to be sure that all dirty pages are written and the
835 * server has the newest file length.
836 */
837 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
838 inode->i_mapping->nrpages != 0) {
839 rc = filemap_fdatawait(inode->i_mapping);
840 if (rc) {
841 mapping_set_error(inode->i_mapping, rc);
842 return rc;
843 }
844 }
845 /*
846 * Some applications poll for the file length in this strange
847 * way so we must seek to end on non-oplocked files by
848 * setting the revalidate time to zero.
849 */
850 CIFS_I(inode)->time = 0;
851
852 rc = cifs_revalidate_file_attr(file);
853 if (rc < 0)
854 return (loff_t)rc;
855 }
856 return generic_file_llseek(file, offset, whence);
857}
858
859static int
860cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
861{
862 /*
863 * Note that this is called by vfs setlease with i_lock held to
864 * protect *lease from going away.
865 */
866 struct inode *inode = file_inode(file);
867 struct cifsFileInfo *cfile = file->private_data;
868
869 if (!(S_ISREG(inode->i_mode)))
870 return -EINVAL;
871
872 /* Check if file is oplocked if this is request for new lease */
873 if (arg == F_UNLCK ||
874 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
875 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
876 return generic_setlease(file, arg, lease, priv);
877 else if (tlink_tcon(cfile->tlink)->local_lease &&
878 !CIFS_CACHE_READ(CIFS_I(inode)))
879 /*
880 * If the server claims to support oplock on this file, then we
881 * still need to check oplock even if the local_lease mount
882 * option is set, but there are servers which do not support
883 * oplock for which this mount option may be useful if the user
884 * knows that the file won't be changed on the server by anyone
885 * else.
886 */
887 return generic_setlease(file, arg, lease, priv);
888 else
889 return -EAGAIN;
890}
891
892struct file_system_type cifs_fs_type = {
893 .owner = THIS_MODULE,
894 .name = "cifs",
895 .mount = cifs_do_mount,
896 .kill_sb = cifs_kill_sb,
897 /* .fs_flags */
898};
899MODULE_ALIAS_FS("cifs");
900const struct inode_operations cifs_dir_inode_ops = {
901 .create = cifs_create,
902 .atomic_open = cifs_atomic_open,
903 .lookup = cifs_lookup,
904 .getattr = cifs_getattr,
905 .unlink = cifs_unlink,
906 .link = cifs_hardlink,
907 .mkdir = cifs_mkdir,
908 .rmdir = cifs_rmdir,
909 .rename = cifs_rename2,
910 .permission = cifs_permission,
911 .setattr = cifs_setattr,
912 .symlink = cifs_symlink,
913 .mknod = cifs_mknod,
914 .listxattr = cifs_listxattr,
915};
916
917const struct inode_operations cifs_file_inode_ops = {
918 .setattr = cifs_setattr,
919 .getattr = cifs_getattr,
920 .permission = cifs_permission,
921 .listxattr = cifs_listxattr,
922};
923
924const struct inode_operations cifs_symlink_inode_ops = {
925 .get_link = cifs_get_link,
926 .permission = cifs_permission,
927 .listxattr = cifs_listxattr,
928};
929
930static int cifs_clone_file_range(struct file *src_file, loff_t off,
931 struct file *dst_file, loff_t destoff, u64 len)
932{
933 struct inode *src_inode = file_inode(src_file);
934 struct inode *target_inode = file_inode(dst_file);
935 struct cifsFileInfo *smb_file_src = src_file->private_data;
936 struct cifsFileInfo *smb_file_target = dst_file->private_data;
937 struct cifs_tcon *target_tcon = tlink_tcon(smb_file_target->tlink);
938 unsigned int xid;
939 int rc;
940
941 cifs_dbg(FYI, "clone range\n");
942
943 xid = get_xid();
944
945 if (!src_file->private_data || !dst_file->private_data) {
946 rc = -EBADF;
947 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
948 goto out;
949 }
950
951 /*
952 * Note: cifs case is easier than btrfs since server responsible for
953 * checks for proper open modes and file type and if it wants
954 * server could even support copy of range where source = target
955 */
956 lock_two_nondirectories(target_inode, src_inode);
957
958 if (len == 0)
959 len = src_inode->i_size - off;
960
961 cifs_dbg(FYI, "about to flush pages\n");
962 /* should we flush first and last page first */
963 truncate_inode_pages_range(&target_inode->i_data, destoff,
964 PAGE_ALIGN(destoff + len)-1);
965
966 if (target_tcon->ses->server->ops->duplicate_extents)
967 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
968 smb_file_src, smb_file_target, off, len, destoff);
969 else
970 rc = -EOPNOTSUPP;
971
972 /* force revalidate of size and timestamps of target file now
973 that target is updated on the server */
974 CIFS_I(target_inode)->time = 0;
975 /* although unlocking in the reverse order from locking is not
976 strictly necessary here it is a little cleaner to be consistent */
977 unlock_two_nondirectories(src_inode, target_inode);
978out:
979 free_xid(xid);
980 return rc;
981}
982
983ssize_t cifs_file_copychunk_range(unsigned int xid,
984 struct file *src_file, loff_t off,
985 struct file *dst_file, loff_t destoff,
986 size_t len, unsigned int flags)
987{
988 struct inode *src_inode = file_inode(src_file);
989 struct inode *target_inode = file_inode(dst_file);
990 struct cifsFileInfo *smb_file_src;
991 struct cifsFileInfo *smb_file_target;
992 struct cifs_tcon *src_tcon;
993 struct cifs_tcon *target_tcon;
994 ssize_t rc;
995
996 cifs_dbg(FYI, "copychunk range\n");
997
998 if (src_inode == target_inode) {
999 rc = -EINVAL;
1000 goto out;
1001 }
1002
1003 if (!src_file->private_data || !dst_file->private_data) {
1004 rc = -EBADF;
1005 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1006 goto out;
1007 }
1008
1009 rc = -EXDEV;
1010 smb_file_target = dst_file->private_data;
1011 smb_file_src = src_file->private_data;
1012 src_tcon = tlink_tcon(smb_file_src->tlink);
1013 target_tcon = tlink_tcon(smb_file_target->tlink);
1014
1015 if (src_tcon->ses != target_tcon->ses) {
1016 cifs_dbg(VFS, "source and target of copy not on same server\n");
1017 goto out;
1018 }
1019
1020 /*
1021 * Note: cifs case is easier than btrfs since server responsible for
1022 * checks for proper open modes and file type and if it wants
1023 * server could even support copy of range where source = target
1024 */
1025 lock_two_nondirectories(target_inode, src_inode);
1026
1027 cifs_dbg(FYI, "about to flush pages\n");
1028 /* should we flush first and last page first */
1029 truncate_inode_pages(&target_inode->i_data, 0);
1030
1031 if (target_tcon->ses->server->ops->copychunk_range)
1032 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1033 smb_file_src, smb_file_target, off, len, destoff);
1034 else
1035 rc = -EOPNOTSUPP;
1036
1037 /* force revalidate of size and timestamps of target file now
1038 * that target is updated on the server
1039 */
1040 CIFS_I(target_inode)->time = 0;
1041 /* although unlocking in the reverse order from locking is not
1042 * strictly necessary here it is a little cleaner to be consistent
1043 */
1044 unlock_two_nondirectories(src_inode, target_inode);
1045
1046out:
1047 return rc;
1048}
1049
1050/*
1051 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1052 * is a dummy operation.
1053 */
1054static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1055{
1056 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1057 file, datasync);
1058
1059 return 0;
1060}
1061
1062static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1063 struct file *dst_file, loff_t destoff,
1064 size_t len, unsigned int flags)
1065{
1066 unsigned int xid = get_xid();
1067 ssize_t rc;
1068
1069 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1070 len, flags);
1071 free_xid(xid);
1072 return rc;
1073}
1074
1075const struct file_operations cifs_file_ops = {
1076 .read_iter = cifs_loose_read_iter,
1077 .write_iter = cifs_file_write_iter,
1078 .open = cifs_open,
1079 .release = cifs_close,
1080 .lock = cifs_lock,
1081 .fsync = cifs_fsync,
1082 .flush = cifs_flush,
1083 .mmap = cifs_file_mmap,
1084 .splice_read = generic_file_splice_read,
1085 .splice_write = iter_file_splice_write,
1086 .llseek = cifs_llseek,
1087 .unlocked_ioctl = cifs_ioctl,
1088 .copy_file_range = cifs_copy_file_range,
1089 .clone_file_range = cifs_clone_file_range,
1090 .setlease = cifs_setlease,
1091 .fallocate = cifs_fallocate,
1092};
1093
1094const struct file_operations cifs_file_strict_ops = {
1095 .read_iter = cifs_strict_readv,
1096 .write_iter = cifs_strict_writev,
1097 .open = cifs_open,
1098 .release = cifs_close,
1099 .lock = cifs_lock,
1100 .fsync = cifs_strict_fsync,
1101 .flush = cifs_flush,
1102 .mmap = cifs_file_strict_mmap,
1103 .splice_read = generic_file_splice_read,
1104 .splice_write = iter_file_splice_write,
1105 .llseek = cifs_llseek,
1106 .unlocked_ioctl = cifs_ioctl,
1107 .copy_file_range = cifs_copy_file_range,
1108 .clone_file_range = cifs_clone_file_range,
1109 .setlease = cifs_setlease,
1110 .fallocate = cifs_fallocate,
1111};
1112
1113const struct file_operations cifs_file_direct_ops = {
1114 /* BB reevaluate whether they can be done with directio, no cache */
1115 .read_iter = cifs_user_readv,
1116 .write_iter = cifs_user_writev,
1117 .open = cifs_open,
1118 .release = cifs_close,
1119 .lock = cifs_lock,
1120 .fsync = cifs_fsync,
1121 .flush = cifs_flush,
1122 .mmap = cifs_file_mmap,
1123 .splice_read = generic_file_splice_read,
1124 .splice_write = iter_file_splice_write,
1125 .unlocked_ioctl = cifs_ioctl,
1126 .copy_file_range = cifs_copy_file_range,
1127 .clone_file_range = cifs_clone_file_range,
1128 .llseek = cifs_llseek,
1129 .setlease = cifs_setlease,
1130 .fallocate = cifs_fallocate,
1131};
1132
1133const struct file_operations cifs_file_nobrl_ops = {
1134 .read_iter = cifs_loose_read_iter,
1135 .write_iter = cifs_file_write_iter,
1136 .open = cifs_open,
1137 .release = cifs_close,
1138 .fsync = cifs_fsync,
1139 .flush = cifs_flush,
1140 .mmap = cifs_file_mmap,
1141 .splice_read = generic_file_splice_read,
1142 .splice_write = iter_file_splice_write,
1143 .llseek = cifs_llseek,
1144 .unlocked_ioctl = cifs_ioctl,
1145 .copy_file_range = cifs_copy_file_range,
1146 .clone_file_range = cifs_clone_file_range,
1147 .setlease = cifs_setlease,
1148 .fallocate = cifs_fallocate,
1149};
1150
1151const struct file_operations cifs_file_strict_nobrl_ops = {
1152 .read_iter = cifs_strict_readv,
1153 .write_iter = cifs_strict_writev,
1154 .open = cifs_open,
1155 .release = cifs_close,
1156 .fsync = cifs_strict_fsync,
1157 .flush = cifs_flush,
1158 .mmap = cifs_file_strict_mmap,
1159 .splice_read = generic_file_splice_read,
1160 .splice_write = iter_file_splice_write,
1161 .llseek = cifs_llseek,
1162 .unlocked_ioctl = cifs_ioctl,
1163 .copy_file_range = cifs_copy_file_range,
1164 .clone_file_range = cifs_clone_file_range,
1165 .setlease = cifs_setlease,
1166 .fallocate = cifs_fallocate,
1167};
1168
1169const struct file_operations cifs_file_direct_nobrl_ops = {
1170 /* BB reevaluate whether they can be done with directio, no cache */
1171 .read_iter = cifs_user_readv,
1172 .write_iter = cifs_user_writev,
1173 .open = cifs_open,
1174 .release = cifs_close,
1175 .fsync = cifs_fsync,
1176 .flush = cifs_flush,
1177 .mmap = cifs_file_mmap,
1178 .splice_read = generic_file_splice_read,
1179 .splice_write = iter_file_splice_write,
1180 .unlocked_ioctl = cifs_ioctl,
1181 .copy_file_range = cifs_copy_file_range,
1182 .clone_file_range = cifs_clone_file_range,
1183 .llseek = cifs_llseek,
1184 .setlease = cifs_setlease,
1185 .fallocate = cifs_fallocate,
1186};
1187
1188const struct file_operations cifs_dir_ops = {
1189 .iterate_shared = cifs_readdir,
1190 .release = cifs_closedir,
1191 .read = generic_read_dir,
1192 .unlocked_ioctl = cifs_ioctl,
1193 .copy_file_range = cifs_copy_file_range,
1194 .clone_file_range = cifs_clone_file_range,
1195 .llseek = generic_file_llseek,
1196 .fsync = cifs_dir_fsync,
1197};
1198
1199static void
1200cifs_init_once(void *inode)
1201{
1202 struct cifsInodeInfo *cifsi = inode;
1203
1204 inode_init_once(&cifsi->vfs_inode);
1205 init_rwsem(&cifsi->lock_sem);
1206}
1207
1208static int __init
1209cifs_init_inodecache(void)
1210{
1211 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1212 sizeof(struct cifsInodeInfo),
1213 0, (SLAB_RECLAIM_ACCOUNT|
1214 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1215 cifs_init_once);
1216 if (cifs_inode_cachep == NULL)
1217 return -ENOMEM;
1218
1219 return 0;
1220}
1221
1222static void
1223cifs_destroy_inodecache(void)
1224{
1225 /*
1226 * Make sure all delayed rcu free inodes are flushed before we
1227 * destroy cache.
1228 */
1229 rcu_barrier();
1230 kmem_cache_destroy(cifs_inode_cachep);
1231}
1232
1233static int
1234cifs_init_request_bufs(void)
1235{
1236 /*
1237 * SMB2 maximum header size is bigger than CIFS one - no problems to
1238 * allocate some more bytes for CIFS.
1239 */
1240 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1241
1242 if (CIFSMaxBufSize < 8192) {
1243 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1244 Unicode path name has to fit in any SMB/CIFS path based frames */
1245 CIFSMaxBufSize = 8192;
1246 } else if (CIFSMaxBufSize > 1024*127) {
1247 CIFSMaxBufSize = 1024 * 127;
1248 } else {
1249 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1250 }
1251/*
1252 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1253 CIFSMaxBufSize, CIFSMaxBufSize);
1254*/
1255 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1256 CIFSMaxBufSize + max_hdr_size, 0,
1257 SLAB_HWCACHE_ALIGN, 0,
1258 CIFSMaxBufSize + max_hdr_size,
1259 NULL);
1260 if (cifs_req_cachep == NULL)
1261 return -ENOMEM;
1262
1263 if (cifs_min_rcv < 1)
1264 cifs_min_rcv = 1;
1265 else if (cifs_min_rcv > 64) {
1266 cifs_min_rcv = 64;
1267 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1268 }
1269
1270 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1271 cifs_req_cachep);
1272
1273 if (cifs_req_poolp == NULL) {
1274 kmem_cache_destroy(cifs_req_cachep);
1275 return -ENOMEM;
1276 }
1277 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1278 almost all handle based requests (but not write response, nor is it
1279 sufficient for path based requests). A smaller size would have
1280 been more efficient (compacting multiple slab items on one 4k page)
1281 for the case in which debug was on, but this larger size allows
1282 more SMBs to use small buffer alloc and is still much more
1283 efficient to alloc 1 per page off the slab compared to 17K (5page)
1284 alloc of large cifs buffers even when page debugging is on */
1285 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1286 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1287 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1288 if (cifs_sm_req_cachep == NULL) {
1289 mempool_destroy(cifs_req_poolp);
1290 kmem_cache_destroy(cifs_req_cachep);
1291 return -ENOMEM;
1292 }
1293
1294 if (cifs_min_small < 2)
1295 cifs_min_small = 2;
1296 else if (cifs_min_small > 256) {
1297 cifs_min_small = 256;
1298 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1299 }
1300
1301 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1302 cifs_sm_req_cachep);
1303
1304 if (cifs_sm_req_poolp == NULL) {
1305 mempool_destroy(cifs_req_poolp);
1306 kmem_cache_destroy(cifs_req_cachep);
1307 kmem_cache_destroy(cifs_sm_req_cachep);
1308 return -ENOMEM;
1309 }
1310
1311 return 0;
1312}
1313
1314static void
1315cifs_destroy_request_bufs(void)
1316{
1317 mempool_destroy(cifs_req_poolp);
1318 kmem_cache_destroy(cifs_req_cachep);
1319 mempool_destroy(cifs_sm_req_poolp);
1320 kmem_cache_destroy(cifs_sm_req_cachep);
1321}
1322
1323static int
1324cifs_init_mids(void)
1325{
1326 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1327 sizeof(struct mid_q_entry), 0,
1328 SLAB_HWCACHE_ALIGN, NULL);
1329 if (cifs_mid_cachep == NULL)
1330 return -ENOMEM;
1331
1332 /* 3 is a reasonable minimum number of simultaneous operations */
1333 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1334 if (cifs_mid_poolp == NULL) {
1335 kmem_cache_destroy(cifs_mid_cachep);
1336 return -ENOMEM;
1337 }
1338
1339 return 0;
1340}
1341
1342static void
1343cifs_destroy_mids(void)
1344{
1345 mempool_destroy(cifs_mid_poolp);
1346 kmem_cache_destroy(cifs_mid_cachep);
1347}
1348
1349static int __init
1350init_cifs(void)
1351{
1352 int rc = 0;
1353 cifs_proc_init();
1354 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1355#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1356 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1357 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1358#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1359/*
1360 * Initialize Global counters
1361 */
1362 atomic_set(&sesInfoAllocCount, 0);
1363 atomic_set(&tconInfoAllocCount, 0);
1364 atomic_set(&tcpSesAllocCount, 0);
1365 atomic_set(&tcpSesReconnectCount, 0);
1366 atomic_set(&tconInfoReconnectCount, 0);
1367
1368 atomic_set(&bufAllocCount, 0);
1369 atomic_set(&smBufAllocCount, 0);
1370#ifdef CONFIG_CIFS_STATS2
1371 atomic_set(&totBufAllocCount, 0);
1372 atomic_set(&totSmBufAllocCount, 0);
1373#endif /* CONFIG_CIFS_STATS2 */
1374
1375 atomic_set(&midCount, 0);
1376 GlobalCurrentXid = 0;
1377 GlobalTotalActiveXid = 0;
1378 GlobalMaxActiveXid = 0;
1379 spin_lock_init(&cifs_tcp_ses_lock);
1380 spin_lock_init(&GlobalMid_Lock);
1381
1382 cifs_lock_secret = get_random_u32();
1383
1384 if (cifs_max_pending < 2) {
1385 cifs_max_pending = 2;
1386 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1387 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1388 cifs_max_pending = CIFS_MAX_REQ;
1389 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1390 CIFS_MAX_REQ);
1391 }
1392
1393 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1394 if (!cifsiod_wq) {
1395 rc = -ENOMEM;
1396 goto out_clean_proc;
1397 }
1398
1399 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1400 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1401 if (!cifsoplockd_wq) {
1402 rc = -ENOMEM;
1403 goto out_destroy_cifsiod_wq;
1404 }
1405
1406 rc = cifs_fscache_register();
1407 if (rc)
1408 goto out_destroy_cifsoplockd_wq;
1409
1410 rc = cifs_init_inodecache();
1411 if (rc)
1412 goto out_unreg_fscache;
1413
1414 rc = cifs_init_mids();
1415 if (rc)
1416 goto out_destroy_inodecache;
1417
1418 rc = cifs_init_request_bufs();
1419 if (rc)
1420 goto out_destroy_mids;
1421
1422#ifdef CONFIG_CIFS_UPCALL
1423 rc = init_cifs_spnego();
1424 if (rc)
1425 goto out_destroy_request_bufs;
1426#endif /* CONFIG_CIFS_UPCALL */
1427
1428#ifdef CONFIG_CIFS_ACL
1429 rc = init_cifs_idmap();
1430 if (rc)
1431 goto out_register_key_type;
1432#endif /* CONFIG_CIFS_ACL */
1433
1434 rc = register_filesystem(&cifs_fs_type);
1435 if (rc)
1436 goto out_init_cifs_idmap;
1437
1438 return 0;
1439
1440out_init_cifs_idmap:
1441#ifdef CONFIG_CIFS_ACL
1442 exit_cifs_idmap();
1443out_register_key_type:
1444#endif
1445#ifdef CONFIG_CIFS_UPCALL
1446 exit_cifs_spnego();
1447out_destroy_request_bufs:
1448#endif
1449 cifs_destroy_request_bufs();
1450out_destroy_mids:
1451 cifs_destroy_mids();
1452out_destroy_inodecache:
1453 cifs_destroy_inodecache();
1454out_unreg_fscache:
1455 cifs_fscache_unregister();
1456out_destroy_cifsoplockd_wq:
1457 destroy_workqueue(cifsoplockd_wq);
1458out_destroy_cifsiod_wq:
1459 destroy_workqueue(cifsiod_wq);
1460out_clean_proc:
1461 cifs_proc_clean();
1462 return rc;
1463}
1464
1465static void __exit
1466exit_cifs(void)
1467{
1468 cifs_dbg(NOISY, "exit_cifs\n");
1469 unregister_filesystem(&cifs_fs_type);
1470 cifs_dfs_release_automount_timer();
1471#ifdef CONFIG_CIFS_ACL
1472 exit_cifs_idmap();
1473#endif
1474#ifdef CONFIG_CIFS_UPCALL
1475 exit_cifs_spnego();
1476#endif
1477 cifs_destroy_request_bufs();
1478 cifs_destroy_mids();
1479 cifs_destroy_inodecache();
1480 cifs_fscache_unregister();
1481 destroy_workqueue(cifsoplockd_wq);
1482 destroy_workqueue(cifsiod_wq);
1483 cifs_proc_clean();
1484}
1485
1486MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1487MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1488MODULE_DESCRIPTION
1489 ("VFS to access servers complying with the SNIA CIFS Specification "
1490 "e.g. Samba and Windows");
1491MODULE_VERSION(CIFS_VERSION);
1492MODULE_SOFTDEP("pre: arc4");
1493MODULE_SOFTDEP("pre: des");
1494MODULE_SOFTDEP("pre: ecb");
1495MODULE_SOFTDEP("pre: hmac");
1496MODULE_SOFTDEP("pre: md4");
1497MODULE_SOFTDEP("pre: md5");
1498MODULE_SOFTDEP("pre: nls");
1499MODULE_SOFTDEP("pre: aes");
1500MODULE_SOFTDEP("pre: cmac");
1501MODULE_SOFTDEP("pre: sha256");
1502MODULE_SOFTDEP("pre: sha512");
1503MODULE_SOFTDEP("pre: aead2");
1504MODULE_SOFTDEP("pre: ccm");
1505module_init(init_cifs)
1506module_exit(exit_cifs)