4 * Copyright (C) International Business Machines Corp., 2002,2008
7 * Common Internet FileSystem (CIFS) client
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.
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.
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
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.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>
45 #define DECLARE_GLOBALS_HERE
47 #include "cifsproto.h"
48 #include "cifs_debug.h"
49 #include "cifs_fs_sb.h"
51 #include <linux/key-type.h>
52 #include "cifs_spnego.h"
55 #ifdef CONFIG_CIFS_DFS_UPCALL
56 #include "dfs_cache.h"
60 * DOS dates from 1980/1/1 through 2107/12/31
61 * Protocol specifications indicate the range should be to 119, which
62 * limits maximum year to 2099. But this range has not been checked.
64 #define SMB_DATE_MAX (127<<9 | 12<<5 | 31)
65 #define SMB_DATE_MIN (0<<9 | 1<<5 | 1)
66 #define SMB_TIME_MAX (23<<11 | 59<<5 | 29)
70 bool enable_oplocks = true;
71 bool linuxExtEnabled = true;
72 bool lookupCacheEnabled = true;
73 bool disable_legacy_dialects; /* false by default */
74 unsigned int global_secflags = CIFSSEC_DEF;
75 /* unsigned int ntlmv2_support = 0; */
76 unsigned int sign_CIFS_PDUs = 1;
77 static const struct super_operations cifs_super_ops;
78 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
79 module_param(CIFSMaxBufSize, uint, 0444);
80 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) "
82 "Default: 16384 Range: 8192 to 130048");
83 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
84 module_param(cifs_min_rcv, uint, 0444);
85 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
87 unsigned int cifs_min_small = 30;
88 module_param(cifs_min_small, uint, 0444);
89 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
91 unsigned int cifs_max_pending = CIFS_MAX_REQ;
92 module_param(cifs_max_pending, uint, 0444);
93 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for "
94 "CIFS/SMB1 dialect (N/A for SMB3) "
95 "Default: 32767 Range: 2 to 32767.");
96 #ifdef CONFIG_CIFS_STATS2
97 unsigned int slow_rsp_threshold = 1;
98 module_param(slow_rsp_threshold, uint, 0644);
99 MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait "
100 "before logging that a response is delayed. "
101 "Default: 1 (if set to 0 disables msg).");
104 module_param(enable_oplocks, bool, 0644);
105 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
107 module_param(disable_legacy_dialects, bool, 0644);
108 MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be "
109 "helpful to restrict the ability to "
110 "override the default dialects (SMB2.1, "
111 "SMB3 and SMB3.02) on mount with old "
112 "dialects (CIFS/SMB1 and SMB2) since "
113 "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
114 " and less secure. Default: n/N/0");
116 extern mempool_t *cifs_sm_req_poolp;
117 extern mempool_t *cifs_req_poolp;
118 extern mempool_t *cifs_mid_poolp;
120 struct workqueue_struct *cifsiod_wq;
121 struct workqueue_struct *decrypt_wq;
122 struct workqueue_struct *cifsoplockd_wq;
123 __u32 cifs_lock_secret;
126 * Bumps refcount for cifs super block.
127 * Note that it should be only called if a referece to VFS super block is
128 * already held, e.g. in open-type syscalls context. Otherwise it can race with
129 * atomic_dec_and_test in deactivate_locked_super.
132 cifs_sb_active(struct super_block *sb)
134 struct cifs_sb_info *server = CIFS_SB(sb);
136 if (atomic_inc_return(&server->active) == 1)
137 atomic_inc(&sb->s_active);
141 cifs_sb_deactive(struct super_block *sb)
143 struct cifs_sb_info *server = CIFS_SB(sb);
145 if (atomic_dec_and_test(&server->active))
146 deactivate_super(sb);
150 cifs_read_super(struct super_block *sb)
153 struct cifs_sb_info *cifs_sb;
154 struct cifs_tcon *tcon;
155 struct timespec64 ts;
158 cifs_sb = CIFS_SB(sb);
159 tcon = cifs_sb_master_tcon(cifs_sb);
161 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
162 sb->s_flags |= SB_POSIXACL;
164 if (tcon->snapshot_time)
165 sb->s_flags |= SB_RDONLY;
167 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
168 sb->s_maxbytes = MAX_LFS_FILESIZE;
170 sb->s_maxbytes = MAX_NON_LFS;
173 * Some very old servers like DOS and OS/2 used 2 second granularity
174 * (while all current servers use 100ns granularity - see MS-DTYP)
175 * but 1 second is the maximum allowed granularity for the VFS
176 * so for old servers set time granularity to 1 second while for
177 * everything else (current servers) set it to 100ns.
179 if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) &&
180 ((tcon->ses->capabilities &
181 tcon->ses->server->vals->cap_nt_find) == 0) &&
183 sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */
184 ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0);
185 sb->s_time_min = ts.tv_sec;
186 ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX),
187 cpu_to_le16(SMB_TIME_MAX), 0);
188 sb->s_time_max = ts.tv_sec;
191 * Almost every server, including all SMB2+, uses DCE TIME
192 * ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC
194 sb->s_time_gran = 100;
195 ts = cifs_NTtimeToUnix(0);
196 sb->s_time_min = ts.tv_sec;
197 ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX));
198 sb->s_time_max = ts.tv_sec;
201 sb->s_magic = CIFS_MAGIC_NUMBER;
202 sb->s_op = &cifs_super_ops;
203 sb->s_xattr = cifs_xattr_handlers;
204 rc = super_setup_bdi(sb);
207 /* tune readahead according to rsize */
208 sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
210 sb->s_blocksize = CIFS_MAX_MSGSIZE;
211 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
212 inode = cifs_root_iget(sb);
220 sb->s_d_op = &cifs_ci_dentry_ops;
222 sb->s_d_op = &cifs_dentry_ops;
224 sb->s_root = d_make_root(inode);
230 #ifdef CONFIG_CIFS_NFSD_EXPORT
231 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
232 cifs_dbg(FYI, "export ops supported\n");
233 sb->s_export_op = &cifs_export_ops;
235 #endif /* CONFIG_CIFS_NFSD_EXPORT */
240 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
244 static void cifs_kill_sb(struct super_block *sb)
246 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
248 cifs_umount(cifs_sb);
252 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
254 struct super_block *sb = dentry->d_sb;
255 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
256 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
257 struct TCP_Server_Info *server = tcon->ses->server;
263 if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
265 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
267 buf->f_namelen = PATH_MAX;
269 buf->f_fsid.val[0] = tcon->vol_serial_number;
270 /* are using part of create time for more randomness, see man statfs */
271 buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
273 buf->f_files = 0; /* undefined */
274 buf->f_ffree = 0; /* unlimited */
276 if (server->ops->queryfs)
277 rc = server->ops->queryfs(xid, tcon, buf);
283 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
285 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
286 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
287 struct TCP_Server_Info *server = tcon->ses->server;
289 if (server->ops->fallocate)
290 return server->ops->fallocate(file, tcon, mode, off, len);
295 static int cifs_permission(struct inode *inode, int mask)
297 struct cifs_sb_info *cifs_sb;
299 cifs_sb = CIFS_SB(inode->i_sb);
301 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
302 if ((mask & MAY_EXEC) && !execute_ok(inode))
306 } else /* file mode might have been restricted at mount time
307 on the client (above and beyond ACL on servers) for
308 servers which do not support setting and viewing mode bits,
309 so allowing client to check permissions is useful */
310 return generic_permission(inode, mask);
313 static struct kmem_cache *cifs_inode_cachep;
314 static struct kmem_cache *cifs_req_cachep;
315 static struct kmem_cache *cifs_mid_cachep;
316 static struct kmem_cache *cifs_sm_req_cachep;
317 mempool_t *cifs_sm_req_poolp;
318 mempool_t *cifs_req_poolp;
319 mempool_t *cifs_mid_poolp;
321 static struct inode *
322 cifs_alloc_inode(struct super_block *sb)
324 struct cifsInodeInfo *cifs_inode;
325 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
328 cifs_inode->cifsAttrs = 0x20; /* default */
329 cifs_inode->time = 0;
331 * Until the file is open and we have gotten oplock info back from the
332 * server, can not assume caching of file data or metadata.
334 cifs_set_oplock_level(cifs_inode, 0);
335 cifs_inode->flags = 0;
336 spin_lock_init(&cifs_inode->writers_lock);
337 cifs_inode->writers = 0;
338 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
339 cifs_inode->server_eof = 0;
340 cifs_inode->uniqueid = 0;
341 cifs_inode->createtime = 0;
342 cifs_inode->epoch = 0;
343 spin_lock_init(&cifs_inode->open_file_lock);
344 generate_random_uuid(cifs_inode->lease_key);
347 * Can not set i_flags here - they get immediately overwritten to zero
350 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
351 INIT_LIST_HEAD(&cifs_inode->openFileList);
352 INIT_LIST_HEAD(&cifs_inode->llist);
353 return &cifs_inode->vfs_inode;
357 cifs_free_inode(struct inode *inode)
359 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
363 cifs_evict_inode(struct inode *inode)
365 truncate_inode_pages_final(&inode->i_data);
367 cifs_fscache_release_inode_cookie(inode);
371 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
373 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
374 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
376 seq_puts(s, ",addr=");
378 switch (server->dstaddr.ss_family) {
380 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
383 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
384 if (sa6->sin6_scope_id)
385 seq_printf(s, "%%%u", sa6->sin6_scope_id);
388 seq_puts(s, "(unknown)");
391 seq_puts(s, ",rdma");
395 cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
397 if (ses->sectype == Unspecified) {
398 if (ses->user_name == NULL)
399 seq_puts(s, ",sec=none");
403 seq_puts(s, ",sec=");
405 switch (ses->sectype) {
407 seq_puts(s, "lanman");
410 seq_puts(s, "ntlmv2");
416 seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid));
419 seq_puts(s, "ntlmssp");
422 /* shouldn't ever happen */
423 seq_puts(s, "unknown");
432 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
434 seq_puts(s, ",cache=");
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
437 seq_puts(s, "strict");
438 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
440 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
441 seq_puts(s, "singleclient"); /* assume only one client access */
442 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)
443 seq_puts(s, "ro"); /* read only caching assumed */
445 seq_puts(s, "loose");
449 cifs_show_nls(struct seq_file *s, struct nls_table *cur)
451 struct nls_table *def;
453 /* Display iocharset= option if it's not default charset */
454 def = load_nls_default();
456 seq_printf(s, ",iocharset=%s", cur->charset);
461 * cifs_show_options() is for displaying mount options in /proc/mounts.
462 * Not all settable options are displayed but most of the important
466 cifs_show_options(struct seq_file *s, struct dentry *root)
468 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
469 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
470 struct sockaddr *srcaddr;
471 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
473 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
474 cifs_show_security(s, tcon->ses);
475 cifs_show_cache_flavor(s, cifs_sb);
478 seq_puts(s, ",nolease");
479 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
480 seq_puts(s, ",multiuser");
481 else if (tcon->ses->user_name)
482 seq_show_option(s, "username", tcon->ses->user_name);
484 if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
485 seq_show_option(s, "domain", tcon->ses->domainName);
487 if (srcaddr->sa_family != AF_UNSPEC) {
488 struct sockaddr_in *saddr4;
489 struct sockaddr_in6 *saddr6;
490 saddr4 = (struct sockaddr_in *)srcaddr;
491 saddr6 = (struct sockaddr_in6 *)srcaddr;
492 if (srcaddr->sa_family == AF_INET6)
493 seq_printf(s, ",srcaddr=%pI6c",
495 else if (srcaddr->sa_family == AF_INET)
496 seq_printf(s, ",srcaddr=%pI4",
497 &saddr4->sin_addr.s_addr);
499 seq_printf(s, ",srcaddr=BAD-AF:%i",
500 (int)(srcaddr->sa_family));
503 seq_printf(s, ",uid=%u",
504 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
505 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
506 seq_puts(s, ",forceuid");
508 seq_puts(s, ",noforceuid");
510 seq_printf(s, ",gid=%u",
511 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
513 seq_puts(s, ",forcegid");
515 seq_puts(s, ",noforcegid");
517 cifs_show_address(s, tcon->ses->server);
520 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
521 cifs_sb->mnt_file_mode,
522 cifs_sb->mnt_dir_mode);
524 cifs_show_nls(s, cifs_sb->local_nls);
527 seq_puts(s, ",seal");
529 seq_puts(s, ",nocase");
530 if (tcon->local_lease)
531 seq_puts(s, ",locallease");
533 seq_puts(s, ",hard");
535 seq_puts(s, ",soft");
536 if (tcon->use_persistent)
537 seq_puts(s, ",persistenthandles");
538 else if (tcon->use_resilient)
539 seq_puts(s, ",resilienthandles");
540 if (tcon->posix_extensions)
541 seq_puts(s, ",posix");
542 else if (tcon->unix_ext)
543 seq_puts(s, ",unix");
545 seq_puts(s, ",nounix");
546 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
547 seq_puts(s, ",nodfs");
548 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
549 seq_puts(s, ",posixpaths");
550 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
551 seq_puts(s, ",setuids");
552 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
553 seq_puts(s, ",idsfromsid");
554 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
555 seq_puts(s, ",serverino");
556 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
557 seq_puts(s, ",rwpidforward");
558 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
559 seq_puts(s, ",forcemand");
560 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
561 seq_puts(s, ",nouser_xattr");
562 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
563 seq_puts(s, ",mapchars");
564 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
565 seq_puts(s, ",mapposix");
566 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
568 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
569 seq_puts(s, ",nobrl");
570 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
571 seq_puts(s, ",nohandlecache");
572 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)
573 seq_puts(s, ",modefromsid");
574 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
575 seq_puts(s, ",cifsacl");
576 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
577 seq_puts(s, ",dynperm");
578 if (root->d_sb->s_flags & SB_POSIXACL)
580 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
581 seq_puts(s, ",mfsymlinks");
582 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
584 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
585 seq_puts(s, ",nostrictsync");
586 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
587 seq_puts(s, ",noperm");
588 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
589 seq_printf(s, ",backupuid=%u",
590 from_kuid_munged(&init_user_ns,
591 cifs_sb->mnt_backupuid));
592 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
593 seq_printf(s, ",backupgid=%u",
594 from_kgid_munged(&init_user_ns,
595 cifs_sb->mnt_backupgid));
597 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
598 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
599 seq_printf(s, ",bsize=%u", cifs_sb->bsize);
600 if (tcon->ses->server->min_offload)
601 seq_printf(s, ",esize=%u", tcon->ses->server->min_offload);
602 seq_printf(s, ",echo_interval=%lu",
603 tcon->ses->server->echo_interval / HZ);
605 /* Only display max_credits if it was overridden on mount */
606 if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE)
607 seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits);
609 if (tcon->snapshot_time)
610 seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
611 if (tcon->handle_timeout)
612 seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
613 /* convert actimeo and display it in seconds */
614 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
619 static void cifs_umount_begin(struct super_block *sb)
621 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
622 struct cifs_tcon *tcon;
627 tcon = cifs_sb_master_tcon(cifs_sb);
629 spin_lock(&cifs_tcp_ses_lock);
630 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
631 /* we have other mounts to same share or we have
632 already tried to force umount this and woken up
633 all waiting network requests, nothing to do */
634 spin_unlock(&cifs_tcp_ses_lock);
636 } else if (tcon->tc_count == 1)
637 tcon->tidStatus = CifsExiting;
638 spin_unlock(&cifs_tcp_ses_lock);
640 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
641 /* cancel_notify_requests(tcon); */
642 if (tcon->ses && tcon->ses->server) {
643 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
644 wake_up_all(&tcon->ses->server->request_q);
645 wake_up_all(&tcon->ses->server->response_q);
646 msleep(1); /* yield */
647 /* we have to kick the requests once more */
648 wake_up_all(&tcon->ses->server->response_q);
655 #ifdef CONFIG_CIFS_STATS2
656 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
663 static int cifs_remount(struct super_block *sb, int *flags, char *data)
666 *flags |= SB_NODIRATIME;
670 static int cifs_drop_inode(struct inode *inode)
672 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
674 /* no serverino => unconditional eviction */
675 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
676 generic_drop_inode(inode);
679 static const struct super_operations cifs_super_ops = {
680 .statfs = cifs_statfs,
681 .alloc_inode = cifs_alloc_inode,
682 .free_inode = cifs_free_inode,
683 .drop_inode = cifs_drop_inode,
684 .evict_inode = cifs_evict_inode,
685 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
686 function unless later we add lazy close of inodes or unless the
687 kernel forgets to call us with the same number of releases (closes)
689 .show_options = cifs_show_options,
690 .umount_begin = cifs_umount_begin,
691 .remount_fs = cifs_remount,
692 #ifdef CONFIG_CIFS_STATS2
693 .show_stats = cifs_show_stats,
698 * Get root dentry from superblock according to prefix path mount option.
699 * Return dentry with refcount + 1 on success and NULL otherwise.
701 static struct dentry *
702 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
704 struct dentry *dentry;
705 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
706 char *full_path = NULL;
710 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
711 return dget(sb->s_root);
713 full_path = cifs_build_path_to_root(vol, cifs_sb,
714 cifs_sb_master_tcon(cifs_sb), 0);
715 if (full_path == NULL)
716 return ERR_PTR(-ENOMEM);
718 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
720 sep = CIFS_DIR_SEP(cifs_sb);
721 dentry = dget(sb->s_root);
725 struct inode *dir = d_inode(dentry);
726 struct dentry *child;
730 dentry = ERR_PTR(-ENOENT);
733 if (!S_ISDIR(dir->i_mode)) {
735 dentry = ERR_PTR(-ENOTDIR);
739 /* skip separators */
746 while (*s && *s != sep)
749 child = lookup_one_len_unlocked(p, dentry, s - p);
752 } while (!IS_ERR(dentry));
757 static int cifs_set_super(struct super_block *sb, void *data)
759 struct cifs_mnt_data *mnt_data = data;
760 sb->s_fs_info = mnt_data->cifs_sb;
761 return set_anon_super(sb, NULL);
764 static struct dentry *
765 cifs_smb3_do_mount(struct file_system_type *fs_type,
766 int flags, const char *dev_name, void *data, bool is_smb3)
769 struct super_block *sb;
770 struct cifs_sb_info *cifs_sb;
771 struct smb_vol *volume_info;
772 struct cifs_mnt_data mnt_data;
776 * Prints in Kernel / CIFS log the attempted mount operation
777 * If CIFS_DEBUG && cifs_FYI
780 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
782 cifs_info("Attempting to mount %s\n", dev_name);
784 volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
785 if (IS_ERR(volume_info))
786 return ERR_CAST(volume_info);
788 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
789 if (cifs_sb == NULL) {
790 root = ERR_PTR(-ENOMEM);
794 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
795 if (cifs_sb->mountdata == NULL) {
796 root = ERR_PTR(-ENOMEM);
800 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
806 rc = cifs_mount(cifs_sb, volume_info);
808 if (!(flags & SB_SILENT))
809 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
815 mnt_data.vol = volume_info;
816 mnt_data.cifs_sb = cifs_sb;
817 mnt_data.flags = flags;
819 /* BB should we make this contingent on mount parm? */
820 flags |= SB_NODIRATIME | SB_NOATIME;
822 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
825 cifs_umount(cifs_sb);
830 cifs_dbg(FYI, "Use existing superblock\n");
831 cifs_umount(cifs_sb);
833 rc = cifs_read_super(sb);
839 sb->s_flags |= SB_ACTIVE;
842 root = cifs_get_root(volume_info, sb);
846 cifs_dbg(FYI, "dentry root is: %p\n", root);
850 deactivate_locked_super(sb);
852 cifs_cleanup_volume_info(volume_info);
856 kfree(cifs_sb->prepath);
857 kfree(cifs_sb->mountdata);
860 unload_nls(volume_info->local_nls);
864 static struct dentry *
865 smb3_do_mount(struct file_system_type *fs_type,
866 int flags, const char *dev_name, void *data)
868 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
871 static struct dentry *
872 cifs_do_mount(struct file_system_type *fs_type,
873 int flags, const char *dev_name, void *data)
875 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
879 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
882 struct inode *inode = file_inode(iocb->ki_filp);
884 if (iocb->ki_filp->f_flags & O_DIRECT)
885 return cifs_user_readv(iocb, iter);
887 rc = cifs_revalidate_mapping(inode);
891 return generic_file_read_iter(iocb, iter);
894 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
896 struct inode *inode = file_inode(iocb->ki_filp);
897 struct cifsInodeInfo *cinode = CIFS_I(inode);
901 if (iocb->ki_filp->f_flags & O_DIRECT) {
902 written = cifs_user_writev(iocb, from);
903 if (written > 0 && CIFS_CACHE_READ(cinode)) {
904 cifs_zap_mapping(inode);
906 "Set no oplock for inode=%p after a write operation\n",
913 written = cifs_get_writer(cinode);
917 written = generic_file_write_iter(iocb, from);
919 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
922 rc = filemap_fdatawrite(inode->i_mapping);
924 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
928 cifs_put_writer(cinode);
932 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
934 struct cifsFileInfo *cfile = file->private_data;
935 struct cifs_tcon *tcon;
938 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
939 * the cached file length
941 if (whence != SEEK_SET && whence != SEEK_CUR) {
943 struct inode *inode = file_inode(file);
946 * We need to be sure that all dirty pages are written and the
947 * server has the newest file length.
949 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
950 inode->i_mapping->nrpages != 0) {
951 rc = filemap_fdatawait(inode->i_mapping);
953 mapping_set_error(inode->i_mapping, rc);
958 * Some applications poll for the file length in this strange
959 * way so we must seek to end on non-oplocked files by
960 * setting the revalidate time to zero.
962 CIFS_I(inode)->time = 0;
964 rc = cifs_revalidate_file_attr(file);
968 if (cfile && cfile->tlink) {
969 tcon = tlink_tcon(cfile->tlink);
970 if (tcon->ses->server->ops->llseek)
971 return tcon->ses->server->ops->llseek(file, tcon,
974 return generic_file_llseek(file, offset, whence);
978 cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
981 * Note that this is called by vfs setlease with i_lock held to
982 * protect *lease from going away.
984 struct inode *inode = file_inode(file);
985 struct cifsFileInfo *cfile = file->private_data;
987 if (!(S_ISREG(inode->i_mode)))
990 /* Check if file is oplocked if this is request for new lease */
991 if (arg == F_UNLCK ||
992 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
993 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
994 return generic_setlease(file, arg, lease, priv);
995 else if (tlink_tcon(cfile->tlink)->local_lease &&
996 !CIFS_CACHE_READ(CIFS_I(inode)))
998 * If the server claims to support oplock on this file, then we
999 * still need to check oplock even if the local_lease mount
1000 * option is set, but there are servers which do not support
1001 * oplock for which this mount option may be useful if the user
1002 * knows that the file won't be changed on the server by anyone
1005 return generic_setlease(file, arg, lease, priv);
1010 struct file_system_type cifs_fs_type = {
1011 .owner = THIS_MODULE,
1013 .mount = cifs_do_mount,
1014 .kill_sb = cifs_kill_sb,
1017 MODULE_ALIAS_FS("cifs");
1019 static struct file_system_type smb3_fs_type = {
1020 .owner = THIS_MODULE,
1022 .mount = smb3_do_mount,
1023 .kill_sb = cifs_kill_sb,
1026 MODULE_ALIAS_FS("smb3");
1027 MODULE_ALIAS("smb3");
1029 const struct inode_operations cifs_dir_inode_ops = {
1030 .create = cifs_create,
1031 .atomic_open = cifs_atomic_open,
1032 .lookup = cifs_lookup,
1033 .getattr = cifs_getattr,
1034 .unlink = cifs_unlink,
1035 .link = cifs_hardlink,
1036 .mkdir = cifs_mkdir,
1037 .rmdir = cifs_rmdir,
1038 .rename = cifs_rename2,
1039 .permission = cifs_permission,
1040 .setattr = cifs_setattr,
1041 .symlink = cifs_symlink,
1042 .mknod = cifs_mknod,
1043 .listxattr = cifs_listxattr,
1046 const struct inode_operations cifs_file_inode_ops = {
1047 .setattr = cifs_setattr,
1048 .getattr = cifs_getattr,
1049 .permission = cifs_permission,
1050 .listxattr = cifs_listxattr,
1051 .fiemap = cifs_fiemap,
1054 const struct inode_operations cifs_symlink_inode_ops = {
1055 .get_link = cifs_get_link,
1056 .permission = cifs_permission,
1057 .listxattr = cifs_listxattr,
1060 static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
1061 struct file *dst_file, loff_t destoff, loff_t len,
1062 unsigned int remap_flags)
1064 struct inode *src_inode = file_inode(src_file);
1065 struct inode *target_inode = file_inode(dst_file);
1066 struct cifsFileInfo *smb_file_src = src_file->private_data;
1067 struct cifsFileInfo *smb_file_target;
1068 struct cifs_tcon *target_tcon;
1072 if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
1075 cifs_dbg(FYI, "clone range\n");
1079 if (!src_file->private_data || !dst_file->private_data) {
1081 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1085 smb_file_target = dst_file->private_data;
1086 target_tcon = tlink_tcon(smb_file_target->tlink);
1089 * Note: cifs case is easier than btrfs since server responsible for
1090 * checks for proper open modes and file type and if it wants
1091 * server could even support copy of range where source = target
1093 lock_two_nondirectories(target_inode, src_inode);
1096 len = src_inode->i_size - off;
1098 cifs_dbg(FYI, "about to flush pages\n");
1099 /* should we flush first and last page first */
1100 truncate_inode_pages_range(&target_inode->i_data, destoff,
1101 PAGE_ALIGN(destoff + len)-1);
1103 if (target_tcon->ses->server->ops->duplicate_extents)
1104 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
1105 smb_file_src, smb_file_target, off, len, destoff);
1109 /* force revalidate of size and timestamps of target file now
1110 that target is updated on the server */
1111 CIFS_I(target_inode)->time = 0;
1112 /* although unlocking in the reverse order from locking is not
1113 strictly necessary here it is a little cleaner to be consistent */
1114 unlock_two_nondirectories(src_inode, target_inode);
1117 return rc < 0 ? rc : len;
1120 ssize_t cifs_file_copychunk_range(unsigned int xid,
1121 struct file *src_file, loff_t off,
1122 struct file *dst_file, loff_t destoff,
1123 size_t len, unsigned int flags)
1125 struct inode *src_inode = file_inode(src_file);
1126 struct inode *target_inode = file_inode(dst_file);
1127 struct cifsFileInfo *smb_file_src;
1128 struct cifsFileInfo *smb_file_target;
1129 struct cifs_tcon *src_tcon;
1130 struct cifs_tcon *target_tcon;
1133 cifs_dbg(FYI, "copychunk range\n");
1135 if (!src_file->private_data || !dst_file->private_data) {
1137 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1142 smb_file_target = dst_file->private_data;
1143 smb_file_src = src_file->private_data;
1144 src_tcon = tlink_tcon(smb_file_src->tlink);
1145 target_tcon = tlink_tcon(smb_file_target->tlink);
1147 if (src_tcon->ses != target_tcon->ses) {
1148 cifs_dbg(VFS, "source and target of copy not on same server\n");
1153 if (!target_tcon->ses->server->ops->copychunk_range)
1157 * Note: cifs case is easier than btrfs since server responsible for
1158 * checks for proper open modes and file type and if it wants
1159 * server could even support copy of range where source = target
1161 lock_two_nondirectories(target_inode, src_inode);
1163 cifs_dbg(FYI, "about to flush pages\n");
1164 /* should we flush first and last page first */
1165 truncate_inode_pages(&target_inode->i_data, 0);
1167 rc = file_modified(dst_file);
1169 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1170 smb_file_src, smb_file_target, off, len, destoff);
1172 file_accessed(src_file);
1174 /* force revalidate of size and timestamps of target file now
1175 * that target is updated on the server
1177 CIFS_I(target_inode)->time = 0;
1178 /* although unlocking in the reverse order from locking is not
1179 * strictly necessary here it is a little cleaner to be consistent
1181 unlock_two_nondirectories(src_inode, target_inode);
1188 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1189 * is a dummy operation.
1191 static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1193 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1199 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1200 struct file *dst_file, loff_t destoff,
1201 size_t len, unsigned int flags)
1203 unsigned int xid = get_xid();
1206 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1210 if (rc == -EOPNOTSUPP || rc == -EXDEV)
1211 rc = generic_copy_file_range(src_file, off, dst_file,
1212 destoff, len, flags);
1216 const struct file_operations cifs_file_ops = {
1217 .read_iter = cifs_loose_read_iter,
1218 .write_iter = cifs_file_write_iter,
1220 .release = cifs_close,
1222 .fsync = cifs_fsync,
1223 .flush = cifs_flush,
1224 .mmap = cifs_file_mmap,
1225 .splice_read = generic_file_splice_read,
1226 .splice_write = iter_file_splice_write,
1227 .llseek = cifs_llseek,
1228 .unlocked_ioctl = cifs_ioctl,
1229 .copy_file_range = cifs_copy_file_range,
1230 .remap_file_range = cifs_remap_file_range,
1231 .setlease = cifs_setlease,
1232 .fallocate = cifs_fallocate,
1235 const struct file_operations cifs_file_strict_ops = {
1236 .read_iter = cifs_strict_readv,
1237 .write_iter = cifs_strict_writev,
1239 .release = cifs_close,
1241 .fsync = cifs_strict_fsync,
1242 .flush = cifs_flush,
1243 .mmap = cifs_file_strict_mmap,
1244 .splice_read = generic_file_splice_read,
1245 .splice_write = iter_file_splice_write,
1246 .llseek = cifs_llseek,
1247 .unlocked_ioctl = cifs_ioctl,
1248 .copy_file_range = cifs_copy_file_range,
1249 .remap_file_range = cifs_remap_file_range,
1250 .setlease = cifs_setlease,
1251 .fallocate = cifs_fallocate,
1254 const struct file_operations cifs_file_direct_ops = {
1255 .read_iter = cifs_direct_readv,
1256 .write_iter = cifs_direct_writev,
1258 .release = cifs_close,
1260 .fsync = cifs_fsync,
1261 .flush = cifs_flush,
1262 .mmap = cifs_file_mmap,
1263 .splice_read = generic_file_splice_read,
1264 .splice_write = iter_file_splice_write,
1265 .unlocked_ioctl = cifs_ioctl,
1266 .copy_file_range = cifs_copy_file_range,
1267 .remap_file_range = cifs_remap_file_range,
1268 .llseek = cifs_llseek,
1269 .setlease = cifs_setlease,
1270 .fallocate = cifs_fallocate,
1273 const struct file_operations cifs_file_nobrl_ops = {
1274 .read_iter = cifs_loose_read_iter,
1275 .write_iter = cifs_file_write_iter,
1277 .release = cifs_close,
1278 .fsync = cifs_fsync,
1279 .flush = cifs_flush,
1280 .mmap = cifs_file_mmap,
1281 .splice_read = generic_file_splice_read,
1282 .splice_write = iter_file_splice_write,
1283 .llseek = cifs_llseek,
1284 .unlocked_ioctl = cifs_ioctl,
1285 .copy_file_range = cifs_copy_file_range,
1286 .remap_file_range = cifs_remap_file_range,
1287 .setlease = cifs_setlease,
1288 .fallocate = cifs_fallocate,
1291 const struct file_operations cifs_file_strict_nobrl_ops = {
1292 .read_iter = cifs_strict_readv,
1293 .write_iter = cifs_strict_writev,
1295 .release = cifs_close,
1296 .fsync = cifs_strict_fsync,
1297 .flush = cifs_flush,
1298 .mmap = cifs_file_strict_mmap,
1299 .splice_read = generic_file_splice_read,
1300 .splice_write = iter_file_splice_write,
1301 .llseek = cifs_llseek,
1302 .unlocked_ioctl = cifs_ioctl,
1303 .copy_file_range = cifs_copy_file_range,
1304 .remap_file_range = cifs_remap_file_range,
1305 .setlease = cifs_setlease,
1306 .fallocate = cifs_fallocate,
1309 const struct file_operations cifs_file_direct_nobrl_ops = {
1310 .read_iter = cifs_direct_readv,
1311 .write_iter = cifs_direct_writev,
1313 .release = cifs_close,
1314 .fsync = cifs_fsync,
1315 .flush = cifs_flush,
1316 .mmap = cifs_file_mmap,
1317 .splice_read = generic_file_splice_read,
1318 .splice_write = iter_file_splice_write,
1319 .unlocked_ioctl = cifs_ioctl,
1320 .copy_file_range = cifs_copy_file_range,
1321 .remap_file_range = cifs_remap_file_range,
1322 .llseek = cifs_llseek,
1323 .setlease = cifs_setlease,
1324 .fallocate = cifs_fallocate,
1327 const struct file_operations cifs_dir_ops = {
1328 .iterate_shared = cifs_readdir,
1329 .release = cifs_closedir,
1330 .read = generic_read_dir,
1331 .unlocked_ioctl = cifs_ioctl,
1332 .copy_file_range = cifs_copy_file_range,
1333 .remap_file_range = cifs_remap_file_range,
1334 .llseek = generic_file_llseek,
1335 .fsync = cifs_dir_fsync,
1339 cifs_init_once(void *inode)
1341 struct cifsInodeInfo *cifsi = inode;
1343 inode_init_once(&cifsi->vfs_inode);
1344 init_rwsem(&cifsi->lock_sem);
1348 cifs_init_inodecache(void)
1350 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1351 sizeof(struct cifsInodeInfo),
1352 0, (SLAB_RECLAIM_ACCOUNT|
1353 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1355 if (cifs_inode_cachep == NULL)
1362 cifs_destroy_inodecache(void)
1365 * Make sure all delayed rcu free inodes are flushed before we
1369 kmem_cache_destroy(cifs_inode_cachep);
1373 cifs_init_request_bufs(void)
1376 * SMB2 maximum header size is bigger than CIFS one - no problems to
1377 * allocate some more bytes for CIFS.
1379 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1381 if (CIFSMaxBufSize < 8192) {
1382 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1383 Unicode path name has to fit in any SMB/CIFS path based frames */
1384 CIFSMaxBufSize = 8192;
1385 } else if (CIFSMaxBufSize > 1024*127) {
1386 CIFSMaxBufSize = 1024 * 127;
1388 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1391 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1392 CIFSMaxBufSize, CIFSMaxBufSize);
1394 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1395 CIFSMaxBufSize + max_hdr_size, 0,
1396 SLAB_HWCACHE_ALIGN, 0,
1397 CIFSMaxBufSize + max_hdr_size,
1399 if (cifs_req_cachep == NULL)
1402 if (cifs_min_rcv < 1)
1404 else if (cifs_min_rcv > 64) {
1406 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1409 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1412 if (cifs_req_poolp == NULL) {
1413 kmem_cache_destroy(cifs_req_cachep);
1416 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1417 almost all handle based requests (but not write response, nor is it
1418 sufficient for path based requests). A smaller size would have
1419 been more efficient (compacting multiple slab items on one 4k page)
1420 for the case in which debug was on, but this larger size allows
1421 more SMBs to use small buffer alloc and is still much more
1422 efficient to alloc 1 per page off the slab compared to 17K (5page)
1423 alloc of large cifs buffers even when page debugging is on */
1424 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1425 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1426 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1427 if (cifs_sm_req_cachep == NULL) {
1428 mempool_destroy(cifs_req_poolp);
1429 kmem_cache_destroy(cifs_req_cachep);
1433 if (cifs_min_small < 2)
1435 else if (cifs_min_small > 256) {
1436 cifs_min_small = 256;
1437 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1440 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1441 cifs_sm_req_cachep);
1443 if (cifs_sm_req_poolp == NULL) {
1444 mempool_destroy(cifs_req_poolp);
1445 kmem_cache_destroy(cifs_req_cachep);
1446 kmem_cache_destroy(cifs_sm_req_cachep);
1454 cifs_destroy_request_bufs(void)
1456 mempool_destroy(cifs_req_poolp);
1457 kmem_cache_destroy(cifs_req_cachep);
1458 mempool_destroy(cifs_sm_req_poolp);
1459 kmem_cache_destroy(cifs_sm_req_cachep);
1463 cifs_init_mids(void)
1465 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1466 sizeof(struct mid_q_entry), 0,
1467 SLAB_HWCACHE_ALIGN, NULL);
1468 if (cifs_mid_cachep == NULL)
1471 /* 3 is a reasonable minimum number of simultaneous operations */
1472 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1473 if (cifs_mid_poolp == NULL) {
1474 kmem_cache_destroy(cifs_mid_cachep);
1482 cifs_destroy_mids(void)
1484 mempool_destroy(cifs_mid_poolp);
1485 kmem_cache_destroy(cifs_mid_cachep);
1493 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1494 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1495 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1496 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1497 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1499 * Initialize Global counters
1501 atomic_set(&sesInfoAllocCount, 0);
1502 atomic_set(&tconInfoAllocCount, 0);
1503 atomic_set(&tcpSesAllocCount, 0);
1504 atomic_set(&tcpSesReconnectCount, 0);
1505 atomic_set(&tconInfoReconnectCount, 0);
1507 atomic_set(&bufAllocCount, 0);
1508 atomic_set(&smBufAllocCount, 0);
1509 #ifdef CONFIG_CIFS_STATS2
1510 atomic_set(&totBufAllocCount, 0);
1511 atomic_set(&totSmBufAllocCount, 0);
1512 if (slow_rsp_threshold < 1)
1513 cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
1514 else if (slow_rsp_threshold > 32767)
1516 "slow response threshold set higher than recommended (0 to 32767)\n");
1517 #endif /* CONFIG_CIFS_STATS2 */
1519 atomic_set(&midCount, 0);
1520 GlobalCurrentXid = 0;
1521 GlobalTotalActiveXid = 0;
1522 GlobalMaxActiveXid = 0;
1523 spin_lock_init(&cifs_tcp_ses_lock);
1524 spin_lock_init(&GlobalMid_Lock);
1526 cifs_lock_secret = get_random_u32();
1528 if (cifs_max_pending < 2) {
1529 cifs_max_pending = 2;
1530 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1531 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1532 cifs_max_pending = CIFS_MAX_REQ;
1533 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1537 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1540 goto out_clean_proc;
1544 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
1545 * so that we don't launch too many worker threads but
1546 * Documentation/workqueue.txt recommends setting it to 0
1549 /* WQ_UNBOUND allows decrypt tasks to run on any CPU */
1550 decrypt_wq = alloc_workqueue("smb3decryptd",
1551 WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1554 goto out_destroy_cifsiod_wq;
1557 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1558 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1559 if (!cifsoplockd_wq) {
1561 goto out_destroy_decrypt_wq;
1564 rc = cifs_fscache_register();
1566 goto out_destroy_cifsoplockd_wq;
1568 rc = cifs_init_inodecache();
1570 goto out_unreg_fscache;
1572 rc = cifs_init_mids();
1574 goto out_destroy_inodecache;
1576 rc = cifs_init_request_bufs();
1578 goto out_destroy_mids;
1580 #ifdef CONFIG_CIFS_DFS_UPCALL
1581 rc = dfs_cache_init();
1583 goto out_destroy_request_bufs;
1584 #endif /* CONFIG_CIFS_DFS_UPCALL */
1585 #ifdef CONFIG_CIFS_UPCALL
1586 rc = init_cifs_spnego();
1588 goto out_destroy_dfs_cache;
1589 #endif /* CONFIG_CIFS_UPCALL */
1591 rc = init_cifs_idmap();
1593 goto out_register_key_type;
1595 rc = register_filesystem(&cifs_fs_type);
1597 goto out_init_cifs_idmap;
1599 rc = register_filesystem(&smb3_fs_type);
1601 unregister_filesystem(&cifs_fs_type);
1602 goto out_init_cifs_idmap;
1607 out_init_cifs_idmap:
1609 out_register_key_type:
1610 #ifdef CONFIG_CIFS_UPCALL
1612 out_destroy_dfs_cache:
1614 #ifdef CONFIG_CIFS_DFS_UPCALL
1615 dfs_cache_destroy();
1616 out_destroy_request_bufs:
1618 cifs_destroy_request_bufs();
1620 cifs_destroy_mids();
1621 out_destroy_inodecache:
1622 cifs_destroy_inodecache();
1624 cifs_fscache_unregister();
1625 out_destroy_cifsoplockd_wq:
1626 destroy_workqueue(cifsoplockd_wq);
1627 out_destroy_decrypt_wq:
1628 destroy_workqueue(decrypt_wq);
1629 out_destroy_cifsiod_wq:
1630 destroy_workqueue(cifsiod_wq);
1639 cifs_dbg(NOISY, "exit_smb3\n");
1640 unregister_filesystem(&cifs_fs_type);
1641 unregister_filesystem(&smb3_fs_type);
1642 cifs_dfs_release_automount_timer();
1644 #ifdef CONFIG_CIFS_UPCALL
1647 #ifdef CONFIG_CIFS_DFS_UPCALL
1648 dfs_cache_destroy();
1650 cifs_destroy_request_bufs();
1651 cifs_destroy_mids();
1652 cifs_destroy_inodecache();
1653 cifs_fscache_unregister();
1654 destroy_workqueue(cifsoplockd_wq);
1655 destroy_workqueue(decrypt_wq);
1656 destroy_workqueue(cifsiod_wq);
1660 MODULE_AUTHOR("Steve French");
1661 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1663 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
1664 "also older servers complying with the SNIA CIFS Specification)");
1665 MODULE_VERSION(CIFS_VERSION);
1666 MODULE_SOFTDEP("pre: ecb");
1667 MODULE_SOFTDEP("pre: hmac");
1668 MODULE_SOFTDEP("pre: md4");
1669 MODULE_SOFTDEP("pre: md5");
1670 MODULE_SOFTDEP("pre: nls");
1671 MODULE_SOFTDEP("pre: aes");
1672 MODULE_SOFTDEP("pre: cmac");
1673 MODULE_SOFTDEP("pre: sha256");
1674 MODULE_SOFTDEP("pre: sha512");
1675 MODULE_SOFTDEP("pre: aead2");
1676 MODULE_SOFTDEP("pre: ccm");
1677 MODULE_SOFTDEP("pre: gcm");
1678 module_init(init_cifs)
1679 module_exit(exit_cifs)