4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
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 *fileinfo_put_wq;
123 struct workqueue_struct *cifsoplockd_wq;
124 __u32 cifs_lock_secret;
127 * Bumps refcount for cifs super block.
128 * Note that it should be only called if a referece to VFS super block is
129 * already held, e.g. in open-type syscalls context. Otherwise it can race with
130 * atomic_dec_and_test in deactivate_locked_super.
133 cifs_sb_active(struct super_block *sb)
135 struct cifs_sb_info *server = CIFS_SB(sb);
137 if (atomic_inc_return(&server->active) == 1)
138 atomic_inc(&sb->s_active);
142 cifs_sb_deactive(struct super_block *sb)
144 struct cifs_sb_info *server = CIFS_SB(sb);
146 if (atomic_dec_and_test(&server->active))
147 deactivate_super(sb);
151 cifs_read_super(struct super_block *sb)
154 struct cifs_sb_info *cifs_sb;
155 struct cifs_tcon *tcon;
156 struct timespec64 ts;
159 cifs_sb = CIFS_SB(sb);
160 tcon = cifs_sb_master_tcon(cifs_sb);
162 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
163 sb->s_flags |= SB_POSIXACL;
165 if (tcon->snapshot_time)
166 sb->s_flags |= SB_RDONLY;
168 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
169 sb->s_maxbytes = MAX_LFS_FILESIZE;
171 sb->s_maxbytes = MAX_NON_LFS;
174 * Some very old servers like DOS and OS/2 used 2 second granularity
175 * (while all current servers use 100ns granularity - see MS-DTYP)
176 * but 1 second is the maximum allowed granularity for the VFS
177 * so for old servers set time granularity to 1 second while for
178 * everything else (current servers) set it to 100ns.
180 if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) &&
181 ((tcon->ses->capabilities &
182 tcon->ses->server->vals->cap_nt_find) == 0) &&
184 sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */
185 ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0);
186 sb->s_time_min = ts.tv_sec;
187 ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX),
188 cpu_to_le16(SMB_TIME_MAX), 0);
189 sb->s_time_max = ts.tv_sec;
192 * Almost every server, including all SMB2+, uses DCE TIME
193 * ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC
195 sb->s_time_gran = 100;
196 ts = cifs_NTtimeToUnix(0);
197 sb->s_time_min = ts.tv_sec;
198 ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX));
199 sb->s_time_max = ts.tv_sec;
202 sb->s_magic = CIFS_MAGIC_NUMBER;
203 sb->s_op = &cifs_super_ops;
204 sb->s_xattr = cifs_xattr_handlers;
205 rc = super_setup_bdi(sb);
208 /* tune readahead according to rsize */
209 sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
211 sb->s_blocksize = CIFS_MAX_MSGSIZE;
212 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
213 inode = cifs_root_iget(sb);
221 sb->s_d_op = &cifs_ci_dentry_ops;
223 sb->s_d_op = &cifs_dentry_ops;
225 sb->s_root = d_make_root(inode);
231 #ifdef CONFIG_CIFS_NFSD_EXPORT
232 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
233 cifs_dbg(FYI, "export ops supported\n");
234 sb->s_export_op = &cifs_export_ops;
236 #endif /* CONFIG_CIFS_NFSD_EXPORT */
241 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
245 static void cifs_kill_sb(struct super_block *sb)
247 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
249 cifs_umount(cifs_sb);
253 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
255 struct super_block *sb = dentry->d_sb;
256 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
257 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
258 struct TCP_Server_Info *server = tcon->ses->server;
264 if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
266 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
268 buf->f_namelen = PATH_MAX;
270 buf->f_fsid.val[0] = tcon->vol_serial_number;
271 /* are using part of create time for more randomness, see man statfs */
272 buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
274 buf->f_files = 0; /* undefined */
275 buf->f_ffree = 0; /* unlimited */
277 if (server->ops->queryfs)
278 rc = server->ops->queryfs(xid, tcon, cifs_sb, buf);
284 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
286 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
287 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
288 struct TCP_Server_Info *server = tcon->ses->server;
290 if (server->ops->fallocate)
291 return server->ops->fallocate(file, tcon, mode, off, len);
296 static int cifs_permission(struct inode *inode, int mask)
298 struct cifs_sb_info *cifs_sb;
300 cifs_sb = CIFS_SB(inode->i_sb);
302 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
303 if ((mask & MAY_EXEC) && !execute_ok(inode))
307 } else /* file mode might have been restricted at mount time
308 on the client (above and beyond ACL on servers) for
309 servers which do not support setting and viewing mode bits,
310 so allowing client to check permissions is useful */
311 return generic_permission(inode, mask);
314 static struct kmem_cache *cifs_inode_cachep;
315 static struct kmem_cache *cifs_req_cachep;
316 static struct kmem_cache *cifs_mid_cachep;
317 static struct kmem_cache *cifs_sm_req_cachep;
318 mempool_t *cifs_sm_req_poolp;
319 mempool_t *cifs_req_poolp;
320 mempool_t *cifs_mid_poolp;
322 static struct inode *
323 cifs_alloc_inode(struct super_block *sb)
325 struct cifsInodeInfo *cifs_inode;
326 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
329 cifs_inode->cifsAttrs = 0x20; /* default */
330 cifs_inode->time = 0;
332 * Until the file is open and we have gotten oplock info back from the
333 * server, can not assume caching of file data or metadata.
335 cifs_set_oplock_level(cifs_inode, 0);
336 cifs_inode->flags = 0;
337 spin_lock_init(&cifs_inode->writers_lock);
338 cifs_inode->writers = 0;
339 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
340 cifs_inode->server_eof = 0;
341 cifs_inode->uniqueid = 0;
342 cifs_inode->createtime = 0;
343 cifs_inode->epoch = 0;
344 spin_lock_init(&cifs_inode->open_file_lock);
345 generate_random_uuid(cifs_inode->lease_key);
348 * Can not set i_flags here - they get immediately overwritten to zero
351 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
352 INIT_LIST_HEAD(&cifs_inode->openFileList);
353 INIT_LIST_HEAD(&cifs_inode->llist);
354 return &cifs_inode->vfs_inode;
358 cifs_free_inode(struct inode *inode)
360 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
364 cifs_evict_inode(struct inode *inode)
366 truncate_inode_pages_final(&inode->i_data);
368 cifs_fscache_release_inode_cookie(inode);
372 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
374 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
375 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
377 seq_puts(s, ",addr=");
379 switch (server->dstaddr.ss_family) {
381 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
384 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
385 if (sa6->sin6_scope_id)
386 seq_printf(s, "%%%u", sa6->sin6_scope_id);
389 seq_puts(s, "(unknown)");
392 seq_puts(s, ",rdma");
396 cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
398 if (ses->sectype == Unspecified) {
399 if (ses->user_name == NULL)
400 seq_puts(s, ",sec=none");
404 seq_puts(s, ",sec=");
406 switch (ses->sectype) {
408 seq_puts(s, "lanman");
411 seq_puts(s, "ntlmv2");
420 seq_puts(s, "ntlmssp");
423 /* shouldn't ever happen */
424 seq_puts(s, "unknown");
431 if (ses->sectype == Kerberos)
432 seq_printf(s, ",cruid=%u",
433 from_kuid_munged(&init_user_ns, ses->cred_uid));
437 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
439 seq_puts(s, ",cache=");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
442 seq_puts(s, "strict");
443 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
445 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
446 seq_puts(s, "singleclient"); /* assume only one client access */
447 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)
448 seq_puts(s, "ro"); /* read only caching assumed */
450 seq_puts(s, "loose");
454 cifs_show_nls(struct seq_file *s, struct nls_table *cur)
456 struct nls_table *def;
458 /* Display iocharset= option if it's not default charset */
459 def = load_nls_default();
461 seq_printf(s, ",iocharset=%s", cur->charset);
466 * cifs_show_options() is for displaying mount options in /proc/mounts.
467 * Not all settable options are displayed but most of the important
471 cifs_show_options(struct seq_file *s, struct dentry *root)
473 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
474 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
475 struct sockaddr *srcaddr;
476 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
478 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
479 cifs_show_security(s, tcon->ses);
480 cifs_show_cache_flavor(s, cifs_sb);
483 seq_puts(s, ",nolease");
484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
485 seq_puts(s, ",multiuser");
486 else if (tcon->ses->user_name)
487 seq_show_option(s, "username", tcon->ses->user_name);
489 if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
490 seq_show_option(s, "domain", tcon->ses->domainName);
492 if (srcaddr->sa_family != AF_UNSPEC) {
493 struct sockaddr_in *saddr4;
494 struct sockaddr_in6 *saddr6;
495 saddr4 = (struct sockaddr_in *)srcaddr;
496 saddr6 = (struct sockaddr_in6 *)srcaddr;
497 if (srcaddr->sa_family == AF_INET6)
498 seq_printf(s, ",srcaddr=%pI6c",
500 else if (srcaddr->sa_family == AF_INET)
501 seq_printf(s, ",srcaddr=%pI4",
502 &saddr4->sin_addr.s_addr);
504 seq_printf(s, ",srcaddr=BAD-AF:%i",
505 (int)(srcaddr->sa_family));
508 seq_printf(s, ",uid=%u",
509 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
510 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
511 seq_puts(s, ",forceuid");
513 seq_puts(s, ",noforceuid");
515 seq_printf(s, ",gid=%u",
516 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
517 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
518 seq_puts(s, ",forcegid");
520 seq_puts(s, ",noforcegid");
522 cifs_show_address(s, tcon->ses->server);
525 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
526 cifs_sb->mnt_file_mode,
527 cifs_sb->mnt_dir_mode);
529 cifs_show_nls(s, cifs_sb->local_nls);
532 seq_puts(s, ",seal");
533 else if (tcon->ses->server->ignore_signature)
534 seq_puts(s, ",signloosely");
536 seq_puts(s, ",nocase");
537 if (tcon->local_lease)
538 seq_puts(s, ",locallease");
540 seq_puts(s, ",hard");
542 seq_puts(s, ",soft");
543 if (tcon->use_persistent)
544 seq_puts(s, ",persistenthandles");
545 else if (tcon->use_resilient)
546 seq_puts(s, ",resilienthandles");
547 if (tcon->posix_extensions)
548 seq_puts(s, ",posix");
549 else if (tcon->unix_ext)
550 seq_puts(s, ",unix");
552 seq_puts(s, ",nounix");
553 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
554 seq_puts(s, ",nodfs");
555 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
556 seq_puts(s, ",posixpaths");
557 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
558 seq_puts(s, ",setuids");
559 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
560 seq_puts(s, ",idsfromsid");
561 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
562 seq_puts(s, ",serverino");
563 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
564 seq_puts(s, ",rwpidforward");
565 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
566 seq_puts(s, ",forcemand");
567 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
568 seq_puts(s, ",nouser_xattr");
569 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
570 seq_puts(s, ",mapchars");
571 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
572 seq_puts(s, ",mapposix");
573 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
575 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
576 seq_puts(s, ",nobrl");
577 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
578 seq_puts(s, ",nohandlecache");
579 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)
580 seq_puts(s, ",modefromsid");
581 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
582 seq_puts(s, ",cifsacl");
583 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
584 seq_puts(s, ",dynperm");
585 if (root->d_sb->s_flags & SB_POSIXACL)
587 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
588 seq_puts(s, ",mfsymlinks");
589 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
591 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
592 seq_puts(s, ",nostrictsync");
593 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
594 seq_puts(s, ",noperm");
595 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
596 seq_printf(s, ",backupuid=%u",
597 from_kuid_munged(&init_user_ns,
598 cifs_sb->mnt_backupuid));
599 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
600 seq_printf(s, ",backupgid=%u",
601 from_kgid_munged(&init_user_ns,
602 cifs_sb->mnt_backupgid));
604 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
605 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
606 seq_printf(s, ",bsize=%u", cifs_sb->bsize);
607 if (tcon->ses->server->min_offload)
608 seq_printf(s, ",esize=%u", tcon->ses->server->min_offload);
609 seq_printf(s, ",echo_interval=%lu",
610 tcon->ses->server->echo_interval / HZ);
612 /* Only display the following if overridden on mount */
613 if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE)
614 seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits);
615 if (tcon->ses->server->tcp_nodelay)
616 seq_puts(s, ",tcpnodelay");
617 if (tcon->ses->server->noautotune)
618 seq_puts(s, ",noautotune");
619 if (tcon->ses->server->noblocksnd)
620 seq_puts(s, ",noblocksend");
622 if (tcon->snapshot_time)
623 seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
624 if (tcon->handle_timeout)
625 seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
626 /* convert actimeo and display it in seconds */
627 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
632 static void cifs_umount_begin(struct super_block *sb)
634 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
635 struct cifs_tcon *tcon;
640 tcon = cifs_sb_master_tcon(cifs_sb);
642 spin_lock(&cifs_tcp_ses_lock);
643 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
644 /* we have other mounts to same share or we have
645 already tried to force umount this and woken up
646 all waiting network requests, nothing to do */
647 spin_unlock(&cifs_tcp_ses_lock);
649 } else if (tcon->tc_count == 1)
650 tcon->tidStatus = CifsExiting;
651 spin_unlock(&cifs_tcp_ses_lock);
653 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
654 /* cancel_notify_requests(tcon); */
655 if (tcon->ses && tcon->ses->server) {
656 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
657 wake_up_all(&tcon->ses->server->request_q);
658 wake_up_all(&tcon->ses->server->response_q);
659 msleep(1); /* yield */
660 /* we have to kick the requests once more */
661 wake_up_all(&tcon->ses->server->response_q);
668 #ifdef CONFIG_CIFS_STATS2
669 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
676 static int cifs_remount(struct super_block *sb, int *flags, char *data)
679 *flags |= SB_NODIRATIME;
683 static int cifs_drop_inode(struct inode *inode)
685 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
687 /* no serverino => unconditional eviction */
688 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
689 generic_drop_inode(inode);
692 static const struct super_operations cifs_super_ops = {
693 .statfs = cifs_statfs,
694 .alloc_inode = cifs_alloc_inode,
695 .free_inode = cifs_free_inode,
696 .drop_inode = cifs_drop_inode,
697 .evict_inode = cifs_evict_inode,
698 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
699 function unless later we add lazy close of inodes or unless the
700 kernel forgets to call us with the same number of releases (closes)
702 .show_options = cifs_show_options,
703 .umount_begin = cifs_umount_begin,
704 .remount_fs = cifs_remount,
705 #ifdef CONFIG_CIFS_STATS2
706 .show_stats = cifs_show_stats,
711 * Get root dentry from superblock according to prefix path mount option.
712 * Return dentry with refcount + 1 on success and NULL otherwise.
714 static struct dentry *
715 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
717 struct dentry *dentry;
718 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
719 char *full_path = NULL;
723 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
724 return dget(sb->s_root);
726 full_path = cifs_build_path_to_root(vol, cifs_sb,
727 cifs_sb_master_tcon(cifs_sb), 0);
728 if (full_path == NULL)
729 return ERR_PTR(-ENOMEM);
731 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
733 sep = CIFS_DIR_SEP(cifs_sb);
734 dentry = dget(sb->s_root);
738 struct inode *dir = d_inode(dentry);
739 struct dentry *child;
741 if (!S_ISDIR(dir->i_mode)) {
743 dentry = ERR_PTR(-ENOTDIR);
747 /* skip separators */
754 while (*s && *s != sep)
757 child = lookup_positive_unlocked(p, dentry, s - p);
760 } while (!IS_ERR(dentry));
765 static int cifs_set_super(struct super_block *sb, void *data)
767 struct cifs_mnt_data *mnt_data = data;
768 sb->s_fs_info = mnt_data->cifs_sb;
769 return set_anon_super(sb, NULL);
772 static struct dentry *
773 cifs_smb3_do_mount(struct file_system_type *fs_type,
774 int flags, const char *dev_name, void *data, bool is_smb3)
777 struct super_block *sb;
778 struct cifs_sb_info *cifs_sb;
779 struct smb_vol *volume_info;
780 struct cifs_mnt_data mnt_data;
784 * Prints in Kernel / CIFS log the attempted mount operation
785 * If CIFS_DEBUG && cifs_FYI
788 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
790 cifs_info("Attempting to mount %s\n", dev_name);
792 volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
793 if (IS_ERR(volume_info))
794 return ERR_CAST(volume_info);
796 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
797 if (cifs_sb == NULL) {
798 root = ERR_PTR(-ENOMEM);
802 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
803 if (cifs_sb->mountdata == NULL) {
804 root = ERR_PTR(-ENOMEM);
808 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
814 rc = cifs_mount(cifs_sb, volume_info);
816 if (!(flags & SB_SILENT))
817 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
823 mnt_data.vol = volume_info;
824 mnt_data.cifs_sb = cifs_sb;
825 mnt_data.flags = flags;
827 /* BB should we make this contingent on mount parm? */
828 flags |= SB_NODIRATIME | SB_NOATIME;
830 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
833 cifs_umount(cifs_sb);
838 cifs_dbg(FYI, "Use existing superblock\n");
839 cifs_umount(cifs_sb);
841 rc = cifs_read_super(sb);
847 sb->s_flags |= SB_ACTIVE;
850 root = cifs_get_root(volume_info, sb);
854 cifs_dbg(FYI, "dentry root is: %p\n", root);
858 deactivate_locked_super(sb);
861 cifs_cleanup_volume_info(volume_info);
865 kfree(cifs_sb->prepath);
866 kfree(cifs_sb->mountdata);
869 unload_nls(volume_info->local_nls);
873 static struct dentry *
874 smb3_do_mount(struct file_system_type *fs_type,
875 int flags, const char *dev_name, void *data)
877 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
880 static struct dentry *
881 cifs_do_mount(struct file_system_type *fs_type,
882 int flags, const char *dev_name, void *data)
884 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
888 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
891 struct inode *inode = file_inode(iocb->ki_filp);
893 if (iocb->ki_flags & IOCB_DIRECT)
894 return cifs_user_readv(iocb, iter);
896 rc = cifs_revalidate_mapping(inode);
900 return generic_file_read_iter(iocb, iter);
903 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
905 struct inode *inode = file_inode(iocb->ki_filp);
906 struct cifsInodeInfo *cinode = CIFS_I(inode);
910 if (iocb->ki_filp->f_flags & O_DIRECT) {
911 written = cifs_user_writev(iocb, from);
912 if (written > 0 && CIFS_CACHE_READ(cinode)) {
913 cifs_zap_mapping(inode);
915 "Set no oplock for inode=%p after a write operation\n",
922 written = cifs_get_writer(cinode);
926 written = generic_file_write_iter(iocb, from);
928 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
931 rc = filemap_fdatawrite(inode->i_mapping);
933 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
937 cifs_put_writer(cinode);
941 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
943 struct cifsFileInfo *cfile = file->private_data;
944 struct cifs_tcon *tcon;
947 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
948 * the cached file length
950 if (whence != SEEK_SET && whence != SEEK_CUR) {
952 struct inode *inode = file_inode(file);
955 * We need to be sure that all dirty pages are written and the
956 * server has the newest file length.
958 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
959 inode->i_mapping->nrpages != 0) {
960 rc = filemap_fdatawait(inode->i_mapping);
962 mapping_set_error(inode->i_mapping, rc);
967 * Some applications poll for the file length in this strange
968 * way so we must seek to end on non-oplocked files by
969 * setting the revalidate time to zero.
971 CIFS_I(inode)->time = 0;
973 rc = cifs_revalidate_file_attr(file);
977 if (cfile && cfile->tlink) {
978 tcon = tlink_tcon(cfile->tlink);
979 if (tcon->ses->server->ops->llseek)
980 return tcon->ses->server->ops->llseek(file, tcon,
983 return generic_file_llseek(file, offset, whence);
987 cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
990 * Note that this is called by vfs setlease with i_lock held to
991 * protect *lease from going away.
993 struct inode *inode = file_inode(file);
994 struct cifsFileInfo *cfile = file->private_data;
996 if (!(S_ISREG(inode->i_mode)))
999 /* Check if file is oplocked if this is request for new lease */
1000 if (arg == F_UNLCK ||
1001 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
1002 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
1003 return generic_setlease(file, arg, lease, priv);
1004 else if (tlink_tcon(cfile->tlink)->local_lease &&
1005 !CIFS_CACHE_READ(CIFS_I(inode)))
1007 * If the server claims to support oplock on this file, then we
1008 * still need to check oplock even if the local_lease mount
1009 * option is set, but there are servers which do not support
1010 * oplock for which this mount option may be useful if the user
1011 * knows that the file won't be changed on the server by anyone
1014 return generic_setlease(file, arg, lease, priv);
1019 struct file_system_type cifs_fs_type = {
1020 .owner = THIS_MODULE,
1022 .mount = cifs_do_mount,
1023 .kill_sb = cifs_kill_sb,
1026 MODULE_ALIAS_FS("cifs");
1028 static struct file_system_type smb3_fs_type = {
1029 .owner = THIS_MODULE,
1031 .mount = smb3_do_mount,
1032 .kill_sb = cifs_kill_sb,
1035 MODULE_ALIAS_FS("smb3");
1036 MODULE_ALIAS("smb3");
1038 const struct inode_operations cifs_dir_inode_ops = {
1039 .create = cifs_create,
1040 .atomic_open = cifs_atomic_open,
1041 .lookup = cifs_lookup,
1042 .getattr = cifs_getattr,
1043 .unlink = cifs_unlink,
1044 .link = cifs_hardlink,
1045 .mkdir = cifs_mkdir,
1046 .rmdir = cifs_rmdir,
1047 .rename = cifs_rename2,
1048 .permission = cifs_permission,
1049 .setattr = cifs_setattr,
1050 .symlink = cifs_symlink,
1051 .mknod = cifs_mknod,
1052 .listxattr = cifs_listxattr,
1055 const struct inode_operations cifs_file_inode_ops = {
1056 .setattr = cifs_setattr,
1057 .getattr = cifs_getattr,
1058 .permission = cifs_permission,
1059 .listxattr = cifs_listxattr,
1060 .fiemap = cifs_fiemap,
1063 const struct inode_operations cifs_symlink_inode_ops = {
1064 .get_link = cifs_get_link,
1065 .permission = cifs_permission,
1066 .listxattr = cifs_listxattr,
1069 static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
1070 struct file *dst_file, loff_t destoff, loff_t len,
1071 unsigned int remap_flags)
1073 struct inode *src_inode = file_inode(src_file);
1074 struct inode *target_inode = file_inode(dst_file);
1075 struct cifsFileInfo *smb_file_src = src_file->private_data;
1076 struct cifsFileInfo *smb_file_target;
1077 struct cifs_tcon *target_tcon;
1081 if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
1084 cifs_dbg(FYI, "clone range\n");
1088 if (!src_file->private_data || !dst_file->private_data) {
1090 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1094 smb_file_target = dst_file->private_data;
1095 target_tcon = tlink_tcon(smb_file_target->tlink);
1098 * Note: cifs case is easier than btrfs since server responsible for
1099 * checks for proper open modes and file type and if it wants
1100 * server could even support copy of range where source = target
1102 lock_two_nondirectories(target_inode, src_inode);
1105 len = src_inode->i_size - off;
1107 cifs_dbg(FYI, "about to flush pages\n");
1108 /* should we flush first and last page first */
1109 truncate_inode_pages_range(&target_inode->i_data, destoff,
1110 PAGE_ALIGN(destoff + len)-1);
1112 if (target_tcon->ses->server->ops->duplicate_extents)
1113 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
1114 smb_file_src, smb_file_target, off, len, destoff);
1118 /* force revalidate of size and timestamps of target file now
1119 that target is updated on the server */
1120 CIFS_I(target_inode)->time = 0;
1121 /* although unlocking in the reverse order from locking is not
1122 strictly necessary here it is a little cleaner to be consistent */
1123 unlock_two_nondirectories(src_inode, target_inode);
1126 return rc < 0 ? rc : len;
1129 ssize_t cifs_file_copychunk_range(unsigned int xid,
1130 struct file *src_file, loff_t off,
1131 struct file *dst_file, loff_t destoff,
1132 size_t len, unsigned int flags)
1134 struct inode *src_inode = file_inode(src_file);
1135 struct inode *target_inode = file_inode(dst_file);
1136 struct cifsFileInfo *smb_file_src;
1137 struct cifsFileInfo *smb_file_target;
1138 struct cifs_tcon *src_tcon;
1139 struct cifs_tcon *target_tcon;
1142 cifs_dbg(FYI, "copychunk range\n");
1144 if (!src_file->private_data || !dst_file->private_data) {
1146 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1151 smb_file_target = dst_file->private_data;
1152 smb_file_src = src_file->private_data;
1153 src_tcon = tlink_tcon(smb_file_src->tlink);
1154 target_tcon = tlink_tcon(smb_file_target->tlink);
1156 if (src_tcon->ses != target_tcon->ses) {
1157 cifs_dbg(VFS, "source and target of copy not on same server\n");
1162 if (!target_tcon->ses->server->ops->copychunk_range)
1166 * Note: cifs case is easier than btrfs since server responsible for
1167 * checks for proper open modes and file type and if it wants
1168 * server could even support copy of range where source = target
1170 lock_two_nondirectories(target_inode, src_inode);
1172 cifs_dbg(FYI, "about to flush pages\n");
1173 /* should we flush first and last page first */
1174 truncate_inode_pages(&target_inode->i_data, 0);
1176 rc = file_modified(dst_file);
1178 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1179 smb_file_src, smb_file_target, off, len, destoff);
1181 file_accessed(src_file);
1183 /* force revalidate of size and timestamps of target file now
1184 * that target is updated on the server
1186 CIFS_I(target_inode)->time = 0;
1187 /* although unlocking in the reverse order from locking is not
1188 * strictly necessary here it is a little cleaner to be consistent
1190 unlock_two_nondirectories(src_inode, target_inode);
1197 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1198 * is a dummy operation.
1200 static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1202 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1208 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1209 struct file *dst_file, loff_t destoff,
1210 size_t len, unsigned int flags)
1212 unsigned int xid = get_xid();
1215 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1219 if (rc == -EOPNOTSUPP || rc == -EXDEV)
1220 rc = generic_copy_file_range(src_file, off, dst_file,
1221 destoff, len, flags);
1225 const struct file_operations cifs_file_ops = {
1226 .read_iter = cifs_loose_read_iter,
1227 .write_iter = cifs_file_write_iter,
1229 .release = cifs_close,
1231 .fsync = cifs_fsync,
1232 .flush = cifs_flush,
1233 .mmap = cifs_file_mmap,
1234 .splice_read = generic_file_splice_read,
1235 .splice_write = iter_file_splice_write,
1236 .llseek = cifs_llseek,
1237 .unlocked_ioctl = cifs_ioctl,
1238 .copy_file_range = cifs_copy_file_range,
1239 .remap_file_range = cifs_remap_file_range,
1240 .setlease = cifs_setlease,
1241 .fallocate = cifs_fallocate,
1244 const struct file_operations cifs_file_strict_ops = {
1245 .read_iter = cifs_strict_readv,
1246 .write_iter = cifs_strict_writev,
1248 .release = cifs_close,
1250 .fsync = cifs_strict_fsync,
1251 .flush = cifs_flush,
1252 .mmap = cifs_file_strict_mmap,
1253 .splice_read = generic_file_splice_read,
1254 .splice_write = iter_file_splice_write,
1255 .llseek = cifs_llseek,
1256 .unlocked_ioctl = cifs_ioctl,
1257 .copy_file_range = cifs_copy_file_range,
1258 .remap_file_range = cifs_remap_file_range,
1259 .setlease = cifs_setlease,
1260 .fallocate = cifs_fallocate,
1263 const struct file_operations cifs_file_direct_ops = {
1264 .read_iter = cifs_direct_readv,
1265 .write_iter = cifs_direct_writev,
1267 .release = cifs_close,
1269 .fsync = cifs_fsync,
1270 .flush = cifs_flush,
1271 .mmap = cifs_file_mmap,
1272 .splice_read = generic_file_splice_read,
1273 .splice_write = iter_file_splice_write,
1274 .unlocked_ioctl = cifs_ioctl,
1275 .copy_file_range = cifs_copy_file_range,
1276 .remap_file_range = cifs_remap_file_range,
1277 .llseek = cifs_llseek,
1278 .setlease = cifs_setlease,
1279 .fallocate = cifs_fallocate,
1282 const struct file_operations cifs_file_nobrl_ops = {
1283 .read_iter = cifs_loose_read_iter,
1284 .write_iter = cifs_file_write_iter,
1286 .release = cifs_close,
1287 .fsync = cifs_fsync,
1288 .flush = cifs_flush,
1289 .mmap = cifs_file_mmap,
1290 .splice_read = generic_file_splice_read,
1291 .splice_write = iter_file_splice_write,
1292 .llseek = cifs_llseek,
1293 .unlocked_ioctl = cifs_ioctl,
1294 .copy_file_range = cifs_copy_file_range,
1295 .remap_file_range = cifs_remap_file_range,
1296 .setlease = cifs_setlease,
1297 .fallocate = cifs_fallocate,
1300 const struct file_operations cifs_file_strict_nobrl_ops = {
1301 .read_iter = cifs_strict_readv,
1302 .write_iter = cifs_strict_writev,
1304 .release = cifs_close,
1305 .fsync = cifs_strict_fsync,
1306 .flush = cifs_flush,
1307 .mmap = cifs_file_strict_mmap,
1308 .splice_read = generic_file_splice_read,
1309 .splice_write = iter_file_splice_write,
1310 .llseek = cifs_llseek,
1311 .unlocked_ioctl = cifs_ioctl,
1312 .copy_file_range = cifs_copy_file_range,
1313 .remap_file_range = cifs_remap_file_range,
1314 .setlease = cifs_setlease,
1315 .fallocate = cifs_fallocate,
1318 const struct file_operations cifs_file_direct_nobrl_ops = {
1319 .read_iter = cifs_direct_readv,
1320 .write_iter = cifs_direct_writev,
1322 .release = cifs_close,
1323 .fsync = cifs_fsync,
1324 .flush = cifs_flush,
1325 .mmap = cifs_file_mmap,
1326 .splice_read = generic_file_splice_read,
1327 .splice_write = iter_file_splice_write,
1328 .unlocked_ioctl = cifs_ioctl,
1329 .copy_file_range = cifs_copy_file_range,
1330 .remap_file_range = cifs_remap_file_range,
1331 .llseek = cifs_llseek,
1332 .setlease = cifs_setlease,
1333 .fallocate = cifs_fallocate,
1336 const struct file_operations cifs_dir_ops = {
1337 .iterate_shared = cifs_readdir,
1338 .release = cifs_closedir,
1339 .read = generic_read_dir,
1340 .unlocked_ioctl = cifs_ioctl,
1341 .copy_file_range = cifs_copy_file_range,
1342 .remap_file_range = cifs_remap_file_range,
1343 .llseek = generic_file_llseek,
1344 .fsync = cifs_dir_fsync,
1348 cifs_init_once(void *inode)
1350 struct cifsInodeInfo *cifsi = inode;
1352 inode_init_once(&cifsi->vfs_inode);
1353 init_rwsem(&cifsi->lock_sem);
1357 cifs_init_inodecache(void)
1359 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1360 sizeof(struct cifsInodeInfo),
1361 0, (SLAB_RECLAIM_ACCOUNT|
1362 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1364 if (cifs_inode_cachep == NULL)
1371 cifs_destroy_inodecache(void)
1374 * Make sure all delayed rcu free inodes are flushed before we
1378 kmem_cache_destroy(cifs_inode_cachep);
1382 cifs_init_request_bufs(void)
1385 * SMB2 maximum header size is bigger than CIFS one - no problems to
1386 * allocate some more bytes for CIFS.
1388 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1390 if (CIFSMaxBufSize < 8192) {
1391 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1392 Unicode path name has to fit in any SMB/CIFS path based frames */
1393 CIFSMaxBufSize = 8192;
1394 } else if (CIFSMaxBufSize > 1024*127) {
1395 CIFSMaxBufSize = 1024 * 127;
1397 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1400 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1401 CIFSMaxBufSize, CIFSMaxBufSize);
1403 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1404 CIFSMaxBufSize + max_hdr_size, 0,
1405 SLAB_HWCACHE_ALIGN, 0,
1406 CIFSMaxBufSize + max_hdr_size,
1408 if (cifs_req_cachep == NULL)
1411 if (cifs_min_rcv < 1)
1413 else if (cifs_min_rcv > 64) {
1415 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1418 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1421 if (cifs_req_poolp == NULL) {
1422 kmem_cache_destroy(cifs_req_cachep);
1425 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1426 almost all handle based requests (but not write response, nor is it
1427 sufficient for path based requests). A smaller size would have
1428 been more efficient (compacting multiple slab items on one 4k page)
1429 for the case in which debug was on, but this larger size allows
1430 more SMBs to use small buffer alloc and is still much more
1431 efficient to alloc 1 per page off the slab compared to 17K (5page)
1432 alloc of large cifs buffers even when page debugging is on */
1433 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1434 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1435 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1436 if (cifs_sm_req_cachep == NULL) {
1437 mempool_destroy(cifs_req_poolp);
1438 kmem_cache_destroy(cifs_req_cachep);
1442 if (cifs_min_small < 2)
1444 else if (cifs_min_small > 256) {
1445 cifs_min_small = 256;
1446 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1449 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1450 cifs_sm_req_cachep);
1452 if (cifs_sm_req_poolp == NULL) {
1453 mempool_destroy(cifs_req_poolp);
1454 kmem_cache_destroy(cifs_req_cachep);
1455 kmem_cache_destroy(cifs_sm_req_cachep);
1463 cifs_destroy_request_bufs(void)
1465 mempool_destroy(cifs_req_poolp);
1466 kmem_cache_destroy(cifs_req_cachep);
1467 mempool_destroy(cifs_sm_req_poolp);
1468 kmem_cache_destroy(cifs_sm_req_cachep);
1472 cifs_init_mids(void)
1474 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1475 sizeof(struct mid_q_entry), 0,
1476 SLAB_HWCACHE_ALIGN, NULL);
1477 if (cifs_mid_cachep == NULL)
1480 /* 3 is a reasonable minimum number of simultaneous operations */
1481 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1482 if (cifs_mid_poolp == NULL) {
1483 kmem_cache_destroy(cifs_mid_cachep);
1491 cifs_destroy_mids(void)
1493 mempool_destroy(cifs_mid_poolp);
1494 kmem_cache_destroy(cifs_mid_cachep);
1502 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1503 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1504 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1505 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1506 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1508 * Initialize Global counters
1510 atomic_set(&sesInfoAllocCount, 0);
1511 atomic_set(&tconInfoAllocCount, 0);
1512 atomic_set(&tcpSesAllocCount, 0);
1513 atomic_set(&tcpSesReconnectCount, 0);
1514 atomic_set(&tconInfoReconnectCount, 0);
1516 atomic_set(&bufAllocCount, 0);
1517 atomic_set(&smBufAllocCount, 0);
1518 #ifdef CONFIG_CIFS_STATS2
1519 atomic_set(&totBufAllocCount, 0);
1520 atomic_set(&totSmBufAllocCount, 0);
1521 if (slow_rsp_threshold < 1)
1522 cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
1523 else if (slow_rsp_threshold > 32767)
1525 "slow response threshold set higher than recommended (0 to 32767)\n");
1526 #endif /* CONFIG_CIFS_STATS2 */
1528 atomic_set(&midCount, 0);
1529 GlobalCurrentXid = 0;
1530 GlobalTotalActiveXid = 0;
1531 GlobalMaxActiveXid = 0;
1532 spin_lock_init(&cifs_tcp_ses_lock);
1533 spin_lock_init(&GlobalMid_Lock);
1535 cifs_lock_secret = get_random_u32();
1537 if (cifs_max_pending < 2) {
1538 cifs_max_pending = 2;
1539 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1540 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1541 cifs_max_pending = CIFS_MAX_REQ;
1542 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1546 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1549 goto out_clean_proc;
1553 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
1554 * so that we don't launch too many worker threads but
1555 * Documentation/workqueue.txt recommends setting it to 0
1558 /* WQ_UNBOUND allows decrypt tasks to run on any CPU */
1559 decrypt_wq = alloc_workqueue("smb3decryptd",
1560 WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1563 goto out_destroy_cifsiod_wq;
1566 fileinfo_put_wq = alloc_workqueue("cifsfileinfoput",
1567 WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1568 if (!fileinfo_put_wq) {
1570 goto out_destroy_decrypt_wq;
1573 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1574 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1575 if (!cifsoplockd_wq) {
1577 goto out_destroy_fileinfo_put_wq;
1580 rc = cifs_fscache_register();
1582 goto out_destroy_cifsoplockd_wq;
1584 rc = cifs_init_inodecache();
1586 goto out_unreg_fscache;
1588 rc = cifs_init_mids();
1590 goto out_destroy_inodecache;
1592 rc = cifs_init_request_bufs();
1594 goto out_destroy_mids;
1596 #ifdef CONFIG_CIFS_DFS_UPCALL
1597 rc = dfs_cache_init();
1599 goto out_destroy_request_bufs;
1600 #endif /* CONFIG_CIFS_DFS_UPCALL */
1601 #ifdef CONFIG_CIFS_UPCALL
1602 rc = init_cifs_spnego();
1604 goto out_destroy_dfs_cache;
1605 #endif /* CONFIG_CIFS_UPCALL */
1607 rc = init_cifs_idmap();
1609 goto out_register_key_type;
1611 rc = register_filesystem(&cifs_fs_type);
1613 goto out_init_cifs_idmap;
1615 rc = register_filesystem(&smb3_fs_type);
1617 unregister_filesystem(&cifs_fs_type);
1618 goto out_init_cifs_idmap;
1623 out_init_cifs_idmap:
1625 out_register_key_type:
1626 #ifdef CONFIG_CIFS_UPCALL
1628 out_destroy_dfs_cache:
1630 #ifdef CONFIG_CIFS_DFS_UPCALL
1631 dfs_cache_destroy();
1632 out_destroy_request_bufs:
1634 cifs_destroy_request_bufs();
1636 cifs_destroy_mids();
1637 out_destroy_inodecache:
1638 cifs_destroy_inodecache();
1640 cifs_fscache_unregister();
1641 out_destroy_cifsoplockd_wq:
1642 destroy_workqueue(cifsoplockd_wq);
1643 out_destroy_fileinfo_put_wq:
1644 destroy_workqueue(fileinfo_put_wq);
1645 out_destroy_decrypt_wq:
1646 destroy_workqueue(decrypt_wq);
1647 out_destroy_cifsiod_wq:
1648 destroy_workqueue(cifsiod_wq);
1657 cifs_dbg(NOISY, "exit_smb3\n");
1658 unregister_filesystem(&cifs_fs_type);
1659 unregister_filesystem(&smb3_fs_type);
1660 cifs_dfs_release_automount_timer();
1662 #ifdef CONFIG_CIFS_UPCALL
1665 #ifdef CONFIG_CIFS_DFS_UPCALL
1666 dfs_cache_destroy();
1668 cifs_destroy_request_bufs();
1669 cifs_destroy_mids();
1670 cifs_destroy_inodecache();
1671 cifs_fscache_unregister();
1672 destroy_workqueue(cifsoplockd_wq);
1673 destroy_workqueue(decrypt_wq);
1674 destroy_workqueue(fileinfo_put_wq);
1675 destroy_workqueue(cifsiod_wq);
1679 MODULE_AUTHOR("Steve French");
1680 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1682 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
1683 "also older servers complying with the SNIA CIFS Specification)");
1684 MODULE_VERSION(CIFS_VERSION);
1685 MODULE_SOFTDEP("pre: ecb");
1686 MODULE_SOFTDEP("pre: hmac");
1687 MODULE_SOFTDEP("pre: md4");
1688 MODULE_SOFTDEP("pre: md5");
1689 MODULE_SOFTDEP("pre: nls");
1690 MODULE_SOFTDEP("pre: aes");
1691 MODULE_SOFTDEP("pre: cmac");
1692 MODULE_SOFTDEP("pre: sha256");
1693 MODULE_SOFTDEP("pre: sha512");
1694 MODULE_SOFTDEP("pre: aead2");
1695 MODULE_SOFTDEP("pre: ccm");
1696 MODULE_SOFTDEP("pre: gcm");
1697 module_init(init_cifs)
1698 module_exit(exit_cifs)