1 // SPDX-License-Identifier: LGPL-2.1
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
11 /* Note that BB means BUGBUG (ie something to fix eventually) */
13 #include <linux/module.h>
15 #include <linux/filelock.h>
16 #include <linux/mount.h>
17 #include <linux/slab.h>
18 #include <linux/init.h>
19 #include <linux/list.h>
20 #include <linux/seq_file.h>
21 #include <linux/vfs.h>
22 #include <linux/mempool.h>
23 #include <linux/delay.h>
24 #include <linux/kthread.h>
25 #include <linux/freezer.h>
26 #include <linux/namei.h>
27 #include <linux/random.h>
28 #include <linux/splice.h>
29 #include <linux/uuid.h>
30 #include <linux/xattr.h>
31 #include <uapi/linux/magic.h>
35 #define DECLARE_GLOBALS_HERE
37 #include "cifsproto.h"
38 #include "cifs_debug.h"
39 #include "cifs_fs_sb.h"
41 #include <linux/key-type.h>
42 #include "cifs_spnego.h"
44 #ifdef CONFIG_CIFS_DFS_UPCALL
45 #include "dfs_cache.h"
47 #ifdef CONFIG_CIFS_SWN_UPCALL
50 #include "fs_context.h"
51 #include "cached_dir.h"
54 * DOS dates from 1980/1/1 through 2107/12/31
55 * Protocol specifications indicate the range should be to 119, which
56 * limits maximum year to 2099. But this range has not been checked.
58 #define SMB_DATE_MAX (127<<9 | 12<<5 | 31)
59 #define SMB_DATE_MIN (0<<9 | 1<<5 | 1)
60 #define SMB_TIME_MAX (23<<11 | 59<<5 | 29)
64 bool enable_oplocks
= true;
65 bool linuxExtEnabled
= true;
66 bool lookupCacheEnabled
= true;
67 bool disable_legacy_dialects
; /* false by default */
68 bool enable_gcm_256
= true;
69 bool require_gcm_256
; /* false by default */
70 bool enable_negotiate_signing
; /* false by default */
71 unsigned int global_secflags
= CIFSSEC_DEF
;
72 /* unsigned int ntlmv2_support = 0; */
73 unsigned int sign_CIFS_PDUs
= 1;
76 * Global transaction id (XID) information
78 unsigned int GlobalCurrentXid
; /* protected by GlobalMid_Sem */
79 unsigned int GlobalTotalActiveXid
; /* prot by GlobalMid_Sem */
80 unsigned int GlobalMaxActiveXid
; /* prot by GlobalMid_Sem */
81 spinlock_t GlobalMid_Lock
; /* protects above & list operations on midQ entries */
84 * Global counters, updated atomically
86 atomic_t sesInfoAllocCount
;
87 atomic_t tconInfoAllocCount
;
88 atomic_t tcpSesNextId
;
89 atomic_t tcpSesAllocCount
;
90 atomic_t tcpSesReconnectCount
;
91 atomic_t tconInfoReconnectCount
;
94 atomic_t buf_alloc_count
;
95 atomic_t small_buf_alloc_count
;
96 #ifdef CONFIG_CIFS_STATS2
97 atomic_t total_buf_alloc_count
;
98 atomic_t total_small_buf_alloc_count
;
100 struct list_head cifs_tcp_ses_list
;
101 spinlock_t cifs_tcp_ses_lock
;
102 static const struct super_operations cifs_super_ops
;
103 unsigned int CIFSMaxBufSize
= CIFS_MAX_MSGSIZE
;
104 module_param(CIFSMaxBufSize
, uint
, 0444);
105 MODULE_PARM_DESC(CIFSMaxBufSize
, "Network buffer size (not including header) "
106 "for CIFS requests. "
107 "Default: 16384 Range: 8192 to 130048");
108 unsigned int cifs_min_rcv
= CIFS_MIN_RCV_POOL
;
109 module_param(cifs_min_rcv
, uint
, 0444);
110 MODULE_PARM_DESC(cifs_min_rcv
, "Network buffers in pool. Default: 4 Range: "
112 unsigned int cifs_min_small
= 30;
113 module_param(cifs_min_small
, uint
, 0444);
114 MODULE_PARM_DESC(cifs_min_small
, "Small network buffers in pool. Default: 30 "
116 unsigned int cifs_max_pending
= CIFS_MAX_REQ
;
117 module_param(cifs_max_pending
, uint
, 0444);
118 MODULE_PARM_DESC(cifs_max_pending
, "Simultaneous requests to server for "
119 "CIFS/SMB1 dialect (N/A for SMB3) "
120 "Default: 32767 Range: 2 to 32767.");
121 unsigned int dir_cache_timeout
= 30;
122 module_param(dir_cache_timeout
, uint
, 0644);
123 MODULE_PARM_DESC(dir_cache_timeout
, "Number of seconds to cache directory contents for which we have a lease. Default: 30 "
124 "Range: 1 to 65000 seconds, 0 to disable caching dir contents");
125 #ifdef CONFIG_CIFS_STATS2
126 unsigned int slow_rsp_threshold
= 1;
127 module_param(slow_rsp_threshold
, uint
, 0644);
128 MODULE_PARM_DESC(slow_rsp_threshold
, "Amount of time (in seconds) to wait "
129 "before logging that a response is delayed. "
130 "Default: 1 (if set to 0 disables msg).");
133 module_param(enable_oplocks
, bool, 0644);
134 MODULE_PARM_DESC(enable_oplocks
, "Enable or disable oplocks. Default: y/Y/1");
136 module_param(enable_gcm_256
, bool, 0644);
137 MODULE_PARM_DESC(enable_gcm_256
, "Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0");
139 module_param(require_gcm_256
, bool, 0644);
140 MODULE_PARM_DESC(require_gcm_256
, "Require strongest (256 bit) GCM encryption. Default: n/N/0");
142 module_param(enable_negotiate_signing
, bool, 0644);
143 MODULE_PARM_DESC(enable_negotiate_signing
, "Enable negotiating packet signing algorithm with server. Default: n/N/0");
145 module_param(disable_legacy_dialects
, bool, 0644);
146 MODULE_PARM_DESC(disable_legacy_dialects
, "To improve security it may be "
147 "helpful to restrict the ability to "
148 "override the default dialects (SMB2.1, "
149 "SMB3 and SMB3.02) on mount with old "
150 "dialects (CIFS/SMB1 and SMB2) since "
151 "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
152 " and less secure. Default: n/N/0");
154 struct workqueue_struct
*cifsiod_wq
;
155 struct workqueue_struct
*decrypt_wq
;
156 struct workqueue_struct
*fileinfo_put_wq
;
157 struct workqueue_struct
*cifsoplockd_wq
;
158 struct workqueue_struct
*deferredclose_wq
;
159 struct workqueue_struct
*serverclose_wq
;
160 __u32 cifs_lock_secret
;
163 * Bumps refcount for cifs super block.
164 * Note that it should be only called if a referece to VFS super block is
165 * already held, e.g. in open-type syscalls context. Otherwise it can race with
166 * atomic_dec_and_test in deactivate_locked_super.
169 cifs_sb_active(struct super_block
*sb
)
171 struct cifs_sb_info
*server
= CIFS_SB(sb
);
173 if (atomic_inc_return(&server
->active
) == 1)
174 atomic_inc(&sb
->s_active
);
178 cifs_sb_deactive(struct super_block
*sb
)
180 struct cifs_sb_info
*server
= CIFS_SB(sb
);
182 if (atomic_dec_and_test(&server
->active
))
183 deactivate_super(sb
);
187 cifs_read_super(struct super_block
*sb
)
190 struct cifs_sb_info
*cifs_sb
;
191 struct cifs_tcon
*tcon
;
192 struct timespec64 ts
;
195 cifs_sb
= CIFS_SB(sb
);
196 tcon
= cifs_sb_master_tcon(cifs_sb
);
198 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIXACL
)
199 sb
->s_flags
|= SB_POSIXACL
;
201 if (tcon
->snapshot_time
)
202 sb
->s_flags
|= SB_RDONLY
;
204 if (tcon
->ses
->capabilities
& tcon
->ses
->server
->vals
->cap_large_files
)
205 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
207 sb
->s_maxbytes
= MAX_NON_LFS
;
210 * Some very old servers like DOS and OS/2 used 2 second granularity
211 * (while all current servers use 100ns granularity - see MS-DTYP)
212 * but 1 second is the maximum allowed granularity for the VFS
213 * so for old servers set time granularity to 1 second while for
214 * everything else (current servers) set it to 100ns.
216 if ((tcon
->ses
->server
->vals
->protocol_id
== SMB10_PROT_ID
) &&
217 ((tcon
->ses
->capabilities
&
218 tcon
->ses
->server
->vals
->cap_nt_find
) == 0) &&
220 sb
->s_time_gran
= 1000000000; /* 1 second is max allowed gran */
221 ts
= cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN
), 0, 0);
222 sb
->s_time_min
= ts
.tv_sec
;
223 ts
= cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX
),
224 cpu_to_le16(SMB_TIME_MAX
), 0);
225 sb
->s_time_max
= ts
.tv_sec
;
228 * Almost every server, including all SMB2+, uses DCE TIME
229 * ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC
231 sb
->s_time_gran
= 100;
232 ts
= cifs_NTtimeToUnix(0);
233 sb
->s_time_min
= ts
.tv_sec
;
234 ts
= cifs_NTtimeToUnix(cpu_to_le64(S64_MAX
));
235 sb
->s_time_max
= ts
.tv_sec
;
238 sb
->s_magic
= CIFS_SUPER_MAGIC
;
239 sb
->s_op
= &cifs_super_ops
;
240 sb
->s_xattr
= cifs_xattr_handlers
;
241 rc
= super_setup_bdi(sb
);
244 /* tune readahead according to rsize if readahead size not set on mount */
245 if (cifs_sb
->ctx
->rsize
== 0)
246 cifs_sb
->ctx
->rsize
=
247 tcon
->ses
->server
->ops
->negotiate_rsize(tcon
, cifs_sb
->ctx
);
248 if (cifs_sb
->ctx
->rasize
)
249 sb
->s_bdi
->ra_pages
= cifs_sb
->ctx
->rasize
/ PAGE_SIZE
;
251 sb
->s_bdi
->ra_pages
= 2 * (cifs_sb
->ctx
->rsize
/ PAGE_SIZE
);
253 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
254 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
255 inode
= cifs_root_iget(sb
);
263 sb
->s_d_op
= &cifs_ci_dentry_ops
;
265 sb
->s_d_op
= &cifs_dentry_ops
;
267 sb
->s_root
= d_make_root(inode
);
273 #ifdef CONFIG_CIFS_NFSD_EXPORT
274 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
275 cifs_dbg(FYI
, "export ops supported\n");
276 sb
->s_export_op
= &cifs_export_ops
;
278 #endif /* CONFIG_CIFS_NFSD_EXPORT */
283 cifs_dbg(VFS
, "%s: get root inode failed\n", __func__
);
287 static void cifs_kill_sb(struct super_block
*sb
)
289 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
292 * We ned to release all dentries for the cached directories
293 * before we kill the sb.
296 close_all_cached_dirs(cifs_sb
);
298 /* finally release root dentry */
300 cifs_sb
->root
= NULL
;
304 cifs_umount(cifs_sb
);
308 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
310 struct super_block
*sb
= dentry
->d_sb
;
311 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
312 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
313 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
319 if (le32_to_cpu(tcon
->fsAttrInfo
.MaxPathNameComponentLength
) > 0)
321 le32_to_cpu(tcon
->fsAttrInfo
.MaxPathNameComponentLength
);
323 buf
->f_namelen
= PATH_MAX
;
325 buf
->f_fsid
.val
[0] = tcon
->vol_serial_number
;
326 /* are using part of create time for more randomness, see man statfs */
327 buf
->f_fsid
.val
[1] = (int)le64_to_cpu(tcon
->vol_create_time
);
329 buf
->f_files
= 0; /* undefined */
330 buf
->f_ffree
= 0; /* unlimited */
332 if (server
->ops
->queryfs
)
333 rc
= server
->ops
->queryfs(xid
, tcon
, cifs_sb
, buf
);
339 static long cifs_fallocate(struct file
*file
, int mode
, loff_t off
, loff_t len
)
341 struct cifs_sb_info
*cifs_sb
= CIFS_FILE_SB(file
);
342 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
343 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
345 if (server
->ops
->fallocate
)
346 return server
->ops
->fallocate(file
, tcon
, mode
, off
, len
);
351 static int cifs_permission(struct mnt_idmap
*idmap
,
352 struct inode
*inode
, int mask
)
354 struct cifs_sb_info
*cifs_sb
;
356 cifs_sb
= CIFS_SB(inode
->i_sb
);
358 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
359 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
363 } else /* file mode might have been restricted at mount time
364 on the client (above and beyond ACL on servers) for
365 servers which do not support setting and viewing mode bits,
366 so allowing client to check permissions is useful */
367 return generic_permission(&nop_mnt_idmap
, inode
, mask
);
370 static struct kmem_cache
*cifs_inode_cachep
;
371 static struct kmem_cache
*cifs_req_cachep
;
372 static struct kmem_cache
*cifs_mid_cachep
;
373 static struct kmem_cache
*cifs_sm_req_cachep
;
374 mempool_t
*cifs_sm_req_poolp
;
375 mempool_t
*cifs_req_poolp
;
376 mempool_t
*cifs_mid_poolp
;
378 static struct inode
*
379 cifs_alloc_inode(struct super_block
*sb
)
381 struct cifsInodeInfo
*cifs_inode
;
382 cifs_inode
= alloc_inode_sb(sb
, cifs_inode_cachep
, GFP_KERNEL
);
385 cifs_inode
->cifsAttrs
= 0x20; /* default */
386 cifs_inode
->time
= 0;
388 * Until the file is open and we have gotten oplock info back from the
389 * server, can not assume caching of file data or metadata.
391 cifs_set_oplock_level(cifs_inode
, 0);
392 cifs_inode
->flags
= 0;
393 spin_lock_init(&cifs_inode
->writers_lock
);
394 cifs_inode
->writers
= 0;
395 cifs_inode
->netfs
.inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
396 cifs_inode
->netfs
.remote_i_size
= 0;
397 cifs_inode
->uniqueid
= 0;
398 cifs_inode
->createtime
= 0;
399 cifs_inode
->epoch
= 0;
400 spin_lock_init(&cifs_inode
->open_file_lock
);
401 generate_random_uuid(cifs_inode
->lease_key
);
402 cifs_inode
->symlink_target
= NULL
;
405 * Can not set i_flags here - they get immediately overwritten to zero
408 /* cifs_inode->netfs.inode.i_flags = S_NOATIME | S_NOCMTIME; */
409 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
410 INIT_LIST_HEAD(&cifs_inode
->llist
);
411 INIT_LIST_HEAD(&cifs_inode
->deferred_closes
);
412 spin_lock_init(&cifs_inode
->deferred_lock
);
413 return &cifs_inode
->netfs
.inode
;
417 cifs_free_inode(struct inode
*inode
)
419 struct cifsInodeInfo
*cinode
= CIFS_I(inode
);
421 if (S_ISLNK(inode
->i_mode
))
422 kfree(cinode
->symlink_target
);
423 kmem_cache_free(cifs_inode_cachep
, cinode
);
427 cifs_evict_inode(struct inode
*inode
)
429 truncate_inode_pages_final(&inode
->i_data
);
430 if (inode
->i_state
& I_PINNING_NETFS_WB
)
431 cifs_fscache_unuse_inode_cookie(inode
, true);
432 cifs_fscache_release_inode_cookie(inode
);
437 cifs_show_address(struct seq_file
*s
, struct TCP_Server_Info
*server
)
439 struct sockaddr_in
*sa
= (struct sockaddr_in
*) &server
->dstaddr
;
440 struct sockaddr_in6
*sa6
= (struct sockaddr_in6
*) &server
->dstaddr
;
442 seq_puts(s
, ",addr=");
444 switch (server
->dstaddr
.ss_family
) {
446 seq_printf(s
, "%pI4", &sa
->sin_addr
.s_addr
);
449 seq_printf(s
, "%pI6", &sa6
->sin6_addr
.s6_addr
);
450 if (sa6
->sin6_scope_id
)
451 seq_printf(s
, "%%%u", sa6
->sin6_scope_id
);
454 seq_puts(s
, "(unknown)");
457 seq_puts(s
, ",rdma");
461 cifs_show_security(struct seq_file
*s
, struct cifs_ses
*ses
)
463 if (ses
->sectype
== Unspecified
) {
464 if (ses
->user_name
== NULL
)
465 seq_puts(s
, ",sec=none");
469 seq_puts(s
, ",sec=");
471 switch (ses
->sectype
) {
473 seq_puts(s
, "ntlmv2");
479 seq_puts(s
, "ntlmssp");
482 /* shouldn't ever happen */
483 seq_puts(s
, "unknown");
490 if (ses
->sectype
== Kerberos
)
491 seq_printf(s
, ",cruid=%u",
492 from_kuid_munged(&init_user_ns
, ses
->cred_uid
));
496 cifs_show_cache_flavor(struct seq_file
*s
, struct cifs_sb_info
*cifs_sb
)
498 seq_puts(s
, ",cache=");
500 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_STRICT_IO
)
501 seq_puts(s
, "strict");
502 else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
504 else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_RW_CACHE
)
505 seq_puts(s
, "singleclient"); /* assume only one client access */
506 else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_RO_CACHE
)
507 seq_puts(s
, "ro"); /* read only caching assumed */
509 seq_puts(s
, "loose");
513 * cifs_show_devname() is used so we show the mount device name with correct
514 * format (e.g. forward slashes vs. back slashes) in /proc/mounts
516 static int cifs_show_devname(struct seq_file
*m
, struct dentry
*root
)
518 struct cifs_sb_info
*cifs_sb
= CIFS_SB(root
->d_sb
);
519 char *devname
= kstrdup(cifs_sb
->ctx
->source
, GFP_KERNEL
);
524 convert_delimiter(devname
, '/');
525 /* escape all spaces in share names */
526 seq_escape(m
, devname
, " \t");
533 * cifs_show_options() is for displaying mount options in /proc/mounts.
534 * Not all settable options are displayed but most of the important
538 cifs_show_options(struct seq_file
*s
, struct dentry
*root
)
540 struct cifs_sb_info
*cifs_sb
= CIFS_SB(root
->d_sb
);
541 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
542 struct sockaddr
*srcaddr
;
543 srcaddr
= (struct sockaddr
*)&tcon
->ses
->server
->srcaddr
;
545 seq_show_option(s
, "vers", tcon
->ses
->server
->vals
->version_string
);
546 cifs_show_security(s
, tcon
->ses
);
547 cifs_show_cache_flavor(s
, cifs_sb
);
550 seq_puts(s
, ",nolease");
551 if (cifs_sb
->ctx
->multiuser
)
552 seq_puts(s
, ",multiuser");
553 else if (tcon
->ses
->user_name
)
554 seq_show_option(s
, "username", tcon
->ses
->user_name
);
556 if (tcon
->ses
->domainName
&& tcon
->ses
->domainName
[0] != 0)
557 seq_show_option(s
, "domain", tcon
->ses
->domainName
);
559 if (srcaddr
->sa_family
!= AF_UNSPEC
) {
560 struct sockaddr_in
*saddr4
;
561 struct sockaddr_in6
*saddr6
;
562 saddr4
= (struct sockaddr_in
*)srcaddr
;
563 saddr6
= (struct sockaddr_in6
*)srcaddr
;
564 if (srcaddr
->sa_family
== AF_INET6
)
565 seq_printf(s
, ",srcaddr=%pI6c",
567 else if (srcaddr
->sa_family
== AF_INET
)
568 seq_printf(s
, ",srcaddr=%pI4",
569 &saddr4
->sin_addr
.s_addr
);
571 seq_printf(s
, ",srcaddr=BAD-AF:%i",
572 (int)(srcaddr
->sa_family
));
575 seq_printf(s
, ",uid=%u",
576 from_kuid_munged(&init_user_ns
, cifs_sb
->ctx
->linux_uid
));
577 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
578 seq_puts(s
, ",forceuid");
580 seq_puts(s
, ",noforceuid");
582 seq_printf(s
, ",gid=%u",
583 from_kgid_munged(&init_user_ns
, cifs_sb
->ctx
->linux_gid
));
584 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
585 seq_puts(s
, ",forcegid");
587 seq_puts(s
, ",noforcegid");
589 cifs_show_address(s
, tcon
->ses
->server
);
592 seq_printf(s
, ",file_mode=0%ho,dir_mode=0%ho",
593 cifs_sb
->ctx
->file_mode
,
594 cifs_sb
->ctx
->dir_mode
);
595 if (cifs_sb
->ctx
->iocharset
)
596 seq_printf(s
, ",iocharset=%s", cifs_sb
->ctx
->iocharset
);
598 seq_puts(s
, ",seal");
599 else if (tcon
->ses
->server
->ignore_signature
)
600 seq_puts(s
, ",signloosely");
602 seq_puts(s
, ",nocase");
604 seq_puts(s
, ",nodelete");
605 if (cifs_sb
->ctx
->no_sparse
)
606 seq_puts(s
, ",nosparse");
607 if (tcon
->local_lease
)
608 seq_puts(s
, ",locallease");
610 seq_puts(s
, ",hard");
612 seq_puts(s
, ",soft");
613 if (tcon
->use_persistent
)
614 seq_puts(s
, ",persistenthandles");
615 else if (tcon
->use_resilient
)
616 seq_puts(s
, ",resilienthandles");
617 if (tcon
->posix_extensions
)
618 seq_puts(s
, ",posix");
619 else if (tcon
->unix_ext
)
620 seq_puts(s
, ",unix");
622 seq_puts(s
, ",nounix");
623 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_DFS
)
624 seq_puts(s
, ",nodfs");
625 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
626 seq_puts(s
, ",posixpaths");
627 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
628 seq_puts(s
, ",setuids");
629 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UID_FROM_ACL
)
630 seq_puts(s
, ",idsfromsid");
631 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
632 seq_puts(s
, ",serverino");
633 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_RWPIDFORWARD
)
634 seq_puts(s
, ",rwpidforward");
635 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NOPOSIXBRL
)
636 seq_puts(s
, ",forcemand");
637 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
638 seq_puts(s
, ",nouser_xattr");
639 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
640 seq_puts(s
, ",mapchars");
641 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SFM_CHR
)
642 seq_puts(s
, ",mapposix");
643 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
645 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
646 seq_puts(s
, ",nobrl");
647 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_HANDLE_CACHE
)
648 seq_puts(s
, ",nohandlecache");
649 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MODE_FROM_SID
)
650 seq_puts(s
, ",modefromsid");
651 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
652 seq_puts(s
, ",cifsacl");
653 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
654 seq_puts(s
, ",dynperm");
655 if (root
->d_sb
->s_flags
& SB_POSIXACL
)
657 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
)
658 seq_puts(s
, ",mfsymlinks");
659 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_FSCACHE
)
661 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NOSSYNC
)
662 seq_puts(s
, ",nostrictsync");
663 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
)
664 seq_puts(s
, ",noperm");
665 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_BACKUPUID
)
666 seq_printf(s
, ",backupuid=%u",
667 from_kuid_munged(&init_user_ns
,
668 cifs_sb
->ctx
->backupuid
));
669 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_BACKUPGID
)
670 seq_printf(s
, ",backupgid=%u",
671 from_kgid_munged(&init_user_ns
,
672 cifs_sb
->ctx
->backupgid
));
673 seq_show_option(s
, "reparse",
674 cifs_reparse_type_str(cifs_sb
->ctx
->reparse_type
));
676 seq_printf(s
, ",rsize=%u", cifs_sb
->ctx
->rsize
);
677 seq_printf(s
, ",wsize=%u", cifs_sb
->ctx
->wsize
);
678 seq_printf(s
, ",bsize=%u", cifs_sb
->ctx
->bsize
);
679 if (cifs_sb
->ctx
->rasize
)
680 seq_printf(s
, ",rasize=%u", cifs_sb
->ctx
->rasize
);
681 if (tcon
->ses
->server
->min_offload
)
682 seq_printf(s
, ",esize=%u", tcon
->ses
->server
->min_offload
);
683 if (tcon
->ses
->server
->retrans
)
684 seq_printf(s
, ",retrans=%u", tcon
->ses
->server
->retrans
);
685 seq_printf(s
, ",echo_interval=%lu",
686 tcon
->ses
->server
->echo_interval
/ HZ
);
688 /* Only display the following if overridden on mount */
689 if (tcon
->ses
->server
->max_credits
!= SMB2_MAX_CREDITS_AVAILABLE
)
690 seq_printf(s
, ",max_credits=%u", tcon
->ses
->server
->max_credits
);
691 if (tcon
->ses
->server
->tcp_nodelay
)
692 seq_puts(s
, ",tcpnodelay");
693 if (tcon
->ses
->server
->noautotune
)
694 seq_puts(s
, ",noautotune");
695 if (tcon
->ses
->server
->noblocksnd
)
696 seq_puts(s
, ",noblocksend");
697 if (tcon
->ses
->server
->nosharesock
)
698 seq_puts(s
, ",nosharesock");
700 if (tcon
->snapshot_time
)
701 seq_printf(s
, ",snapshot=%llu", tcon
->snapshot_time
);
702 if (tcon
->handle_timeout
)
703 seq_printf(s
, ",handletimeout=%u", tcon
->handle_timeout
);
704 if (tcon
->max_cached_dirs
!= MAX_CACHED_FIDS
)
705 seq_printf(s
, ",max_cached_dirs=%u", tcon
->max_cached_dirs
);
708 * Display file and directory attribute timeout in seconds.
709 * If file and directory attribute timeout the same then actimeo
710 * was likely specified on mount
712 if (cifs_sb
->ctx
->acdirmax
== cifs_sb
->ctx
->acregmax
)
713 seq_printf(s
, ",actimeo=%lu", cifs_sb
->ctx
->acregmax
/ HZ
);
715 seq_printf(s
, ",acdirmax=%lu", cifs_sb
->ctx
->acdirmax
/ HZ
);
716 seq_printf(s
, ",acregmax=%lu", cifs_sb
->ctx
->acregmax
/ HZ
);
718 seq_printf(s
, ",closetimeo=%lu", cifs_sb
->ctx
->closetimeo
/ HZ
);
720 if (tcon
->ses
->chan_max
> 1)
721 seq_printf(s
, ",multichannel,max_channels=%zu",
722 tcon
->ses
->chan_max
);
724 if (tcon
->use_witness
)
725 seq_puts(s
, ",witness");
730 static void cifs_umount_begin(struct super_block
*sb
)
732 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
733 struct cifs_tcon
*tcon
;
738 tcon
= cifs_sb_master_tcon(cifs_sb
);
740 spin_lock(&cifs_tcp_ses_lock
);
741 spin_lock(&tcon
->tc_lock
);
742 trace_smb3_tcon_ref(tcon
->debug_id
, tcon
->tc_count
,
743 netfs_trace_tcon_ref_see_umount
);
744 if ((tcon
->tc_count
> 1) || (tcon
->status
== TID_EXITING
)) {
745 /* we have other mounts to same share or we have
746 already tried to umount this and woken up
747 all waiting network requests, nothing to do */
748 spin_unlock(&tcon
->tc_lock
);
749 spin_unlock(&cifs_tcp_ses_lock
);
753 * can not set tcon->status to TID_EXITING yet since we don't know if umount -f will
754 * fail later (e.g. due to open files). TID_EXITING will be set just before tdis req sent
756 spin_unlock(&tcon
->tc_lock
);
757 spin_unlock(&cifs_tcp_ses_lock
);
759 cifs_close_all_deferred_files(tcon
);
760 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
761 /* cancel_notify_requests(tcon); */
762 if (tcon
->ses
&& tcon
->ses
->server
) {
763 cifs_dbg(FYI
, "wake up tasks now - umount begin not complete\n");
764 wake_up_all(&tcon
->ses
->server
->request_q
);
765 wake_up_all(&tcon
->ses
->server
->response_q
);
766 msleep(1); /* yield */
767 /* we have to kick the requests once more */
768 wake_up_all(&tcon
->ses
->server
->response_q
);
775 static int cifs_freeze(struct super_block
*sb
)
777 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
778 struct cifs_tcon
*tcon
;
783 tcon
= cifs_sb_master_tcon(cifs_sb
);
785 cifs_close_all_deferred_files(tcon
);
789 #ifdef CONFIG_CIFS_STATS2
790 static int cifs_show_stats(struct seq_file
*s
, struct dentry
*root
)
797 static int cifs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
799 return netfs_unpin_writeback(inode
, wbc
);
802 static int cifs_drop_inode(struct inode
*inode
)
804 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
806 /* no serverino => unconditional eviction */
807 return !(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) ||
808 generic_drop_inode(inode
);
811 static const struct super_operations cifs_super_ops
= {
812 .statfs
= cifs_statfs
,
813 .alloc_inode
= cifs_alloc_inode
,
814 .write_inode
= cifs_write_inode
,
815 .free_inode
= cifs_free_inode
,
816 .drop_inode
= cifs_drop_inode
,
817 .evict_inode
= cifs_evict_inode
,
818 /* .show_path = cifs_show_path, */ /* Would we ever need show path? */
819 .show_devname
= cifs_show_devname
,
820 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
821 function unless later we add lazy close of inodes or unless the
822 kernel forgets to call us with the same number of releases (closes)
824 .show_options
= cifs_show_options
,
825 .umount_begin
= cifs_umount_begin
,
826 .freeze_fs
= cifs_freeze
,
827 #ifdef CONFIG_CIFS_STATS2
828 .show_stats
= cifs_show_stats
,
833 * Get root dentry from superblock according to prefix path mount option.
834 * Return dentry with refcount + 1 on success and NULL otherwise.
836 static struct dentry
*
837 cifs_get_root(struct smb3_fs_context
*ctx
, struct super_block
*sb
)
839 struct dentry
*dentry
;
840 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
841 char *full_path
= NULL
;
845 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_USE_PREFIX_PATH
)
846 return dget(sb
->s_root
);
848 full_path
= cifs_build_path_to_root(ctx
, cifs_sb
,
849 cifs_sb_master_tcon(cifs_sb
), 0);
850 if (full_path
== NULL
)
851 return ERR_PTR(-ENOMEM
);
853 cifs_dbg(FYI
, "Get root dentry for %s\n", full_path
);
855 sep
= CIFS_DIR_SEP(cifs_sb
);
856 dentry
= dget(sb
->s_root
);
860 struct inode
*dir
= d_inode(dentry
);
861 struct dentry
*child
;
863 if (!S_ISDIR(dir
->i_mode
)) {
865 dentry
= ERR_PTR(-ENOTDIR
);
869 /* skip separators */
876 while (*s
&& *s
!= sep
)
879 child
= lookup_positive_unlocked(p
, dentry
, s
- p
);
882 } while (!IS_ERR(dentry
));
887 static int cifs_set_super(struct super_block
*sb
, void *data
)
889 struct cifs_mnt_data
*mnt_data
= data
;
890 sb
->s_fs_info
= mnt_data
->cifs_sb
;
891 return set_anon_super(sb
, NULL
);
895 cifs_smb3_do_mount(struct file_system_type
*fs_type
,
896 int flags
, struct smb3_fs_context
*old_ctx
)
898 struct cifs_mnt_data mnt_data
;
899 struct cifs_sb_info
*cifs_sb
;
900 struct super_block
*sb
;
905 cifs_dbg(FYI
, "%s: devname=%s flags=0x%x\n", __func__
,
906 old_ctx
->source
, flags
);
908 cifs_info("Attempting to mount %s\n", old_ctx
->source
);
911 cifs_sb
= kzalloc(sizeof(*cifs_sb
), GFP_KERNEL
);
913 return ERR_PTR(-ENOMEM
);
915 cifs_sb
->ctx
= kzalloc(sizeof(struct smb3_fs_context
), GFP_KERNEL
);
917 root
= ERR_PTR(-ENOMEM
);
920 rc
= smb3_fs_context_dup(cifs_sb
->ctx
, old_ctx
);
926 rc
= cifs_setup_cifs_sb(cifs_sb
);
932 rc
= cifs_mount(cifs_sb
, cifs_sb
->ctx
);
934 if (!(flags
& SB_SILENT
))
935 cifs_dbg(VFS
, "cifs_mount failed w/return code = %d\n",
941 mnt_data
.ctx
= cifs_sb
->ctx
;
942 mnt_data
.cifs_sb
= cifs_sb
;
943 mnt_data
.flags
= flags
;
945 /* BB should we make this contingent on mount parm? */
946 flags
|= SB_NODIRATIME
| SB_NOATIME
;
948 sb
= sget(fs_type
, cifs_match_super
, cifs_set_super
, flags
, &mnt_data
);
950 cifs_umount(cifs_sb
);
955 cifs_dbg(FYI
, "Use existing superblock\n");
956 cifs_umount(cifs_sb
);
959 rc
= cifs_read_super(sb
);
965 sb
->s_flags
|= SB_ACTIVE
;
968 root
= cifs_get_root(cifs_sb
? cifs_sb
->ctx
: old_ctx
, sb
);
973 cifs_sb
->root
= dget(root
);
975 cifs_dbg(FYI
, "dentry root is: %p\n", root
);
979 deactivate_locked_super(sb
);
982 kfree(cifs_sb
->prepath
);
983 smb3_cleanup_fs_context(cifs_sb
->ctx
);
990 cifs_loose_read_iter(struct kiocb
*iocb
, struct iov_iter
*iter
)
993 struct inode
*inode
= file_inode(iocb
->ki_filp
);
995 if (iocb
->ki_flags
& IOCB_DIRECT
)
996 return cifs_user_readv(iocb
, iter
);
998 rc
= cifs_revalidate_mapping(inode
);
1002 return generic_file_read_iter(iocb
, iter
);
1005 static ssize_t
cifs_file_write_iter(struct kiocb
*iocb
, struct iov_iter
*from
)
1007 struct inode
*inode
= file_inode(iocb
->ki_filp
);
1008 struct cifsInodeInfo
*cinode
= CIFS_I(inode
);
1012 if (iocb
->ki_filp
->f_flags
& O_DIRECT
) {
1013 written
= cifs_user_writev(iocb
, from
);
1014 if (written
> 0 && CIFS_CACHE_READ(cinode
)) {
1015 cifs_zap_mapping(inode
);
1017 "Set no oplock for inode=%p after a write operation\n",
1024 written
= cifs_get_writer(cinode
);
1028 written
= generic_file_write_iter(iocb
, from
);
1030 if (CIFS_CACHE_WRITE(CIFS_I(inode
)))
1033 rc
= filemap_fdatawrite(inode
->i_mapping
);
1035 cifs_dbg(FYI
, "cifs_file_write_iter: %d rc on %p inode\n",
1039 cifs_put_writer(cinode
);
1043 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int whence
)
1045 struct cifsFileInfo
*cfile
= file
->private_data
;
1046 struct cifs_tcon
*tcon
;
1049 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
1050 * the cached file length
1052 if (whence
!= SEEK_SET
&& whence
!= SEEK_CUR
) {
1054 struct inode
*inode
= file_inode(file
);
1057 * We need to be sure that all dirty pages are written and the
1058 * server has the newest file length.
1060 if (!CIFS_CACHE_READ(CIFS_I(inode
)) && inode
->i_mapping
&&
1061 inode
->i_mapping
->nrpages
!= 0) {
1062 rc
= filemap_fdatawait(inode
->i_mapping
);
1064 mapping_set_error(inode
->i_mapping
, rc
);
1069 * Some applications poll for the file length in this strange
1070 * way so we must seek to end on non-oplocked files by
1071 * setting the revalidate time to zero.
1073 CIFS_I(inode
)->time
= 0;
1075 rc
= cifs_revalidate_file_attr(file
);
1079 if (cfile
&& cfile
->tlink
) {
1080 tcon
= tlink_tcon(cfile
->tlink
);
1081 if (tcon
->ses
->server
->ops
->llseek
)
1082 return tcon
->ses
->server
->ops
->llseek(file
, tcon
,
1085 return generic_file_llseek(file
, offset
, whence
);
1089 cifs_setlease(struct file
*file
, int arg
, struct file_lease
**lease
, void **priv
)
1092 * Note that this is called by vfs setlease with i_lock held to
1093 * protect *lease from going away.
1095 struct inode
*inode
= file_inode(file
);
1096 struct cifsFileInfo
*cfile
= file
->private_data
;
1098 /* Check if file is oplocked if this is request for new lease */
1099 if (arg
== F_UNLCK
||
1100 ((arg
== F_RDLCK
) && CIFS_CACHE_READ(CIFS_I(inode
))) ||
1101 ((arg
== F_WRLCK
) && CIFS_CACHE_WRITE(CIFS_I(inode
))))
1102 return generic_setlease(file
, arg
, lease
, priv
);
1103 else if (tlink_tcon(cfile
->tlink
)->local_lease
&&
1104 !CIFS_CACHE_READ(CIFS_I(inode
)))
1106 * If the server claims to support oplock on this file, then we
1107 * still need to check oplock even if the local_lease mount
1108 * option is set, but there are servers which do not support
1109 * oplock for which this mount option may be useful if the user
1110 * knows that the file won't be changed on the server by anyone
1113 return generic_setlease(file
, arg
, lease
, priv
);
1118 struct file_system_type cifs_fs_type
= {
1119 .owner
= THIS_MODULE
,
1121 .init_fs_context
= smb3_init_fs_context
,
1122 .parameters
= smb3_fs_parameters
,
1123 .kill_sb
= cifs_kill_sb
,
1124 .fs_flags
= FS_RENAME_DOES_D_MOVE
,
1126 MODULE_ALIAS_FS("cifs");
1128 struct file_system_type smb3_fs_type
= {
1129 .owner
= THIS_MODULE
,
1131 .init_fs_context
= smb3_init_fs_context
,
1132 .parameters
= smb3_fs_parameters
,
1133 .kill_sb
= cifs_kill_sb
,
1134 .fs_flags
= FS_RENAME_DOES_D_MOVE
,
1136 MODULE_ALIAS_FS("smb3");
1137 MODULE_ALIAS("smb3");
1139 const struct inode_operations cifs_dir_inode_ops
= {
1140 .create
= cifs_create
,
1141 .atomic_open
= cifs_atomic_open
,
1142 .lookup
= cifs_lookup
,
1143 .getattr
= cifs_getattr
,
1144 .unlink
= cifs_unlink
,
1145 .link
= cifs_hardlink
,
1146 .mkdir
= cifs_mkdir
,
1147 .rmdir
= cifs_rmdir
,
1148 .rename
= cifs_rename2
,
1149 .permission
= cifs_permission
,
1150 .setattr
= cifs_setattr
,
1151 .symlink
= cifs_symlink
,
1152 .mknod
= cifs_mknod
,
1153 .listxattr
= cifs_listxattr
,
1154 .get_acl
= cifs_get_acl
,
1155 .set_acl
= cifs_set_acl
,
1158 const struct inode_operations cifs_file_inode_ops
= {
1159 .setattr
= cifs_setattr
,
1160 .getattr
= cifs_getattr
,
1161 .permission
= cifs_permission
,
1162 .listxattr
= cifs_listxattr
,
1163 .fiemap
= cifs_fiemap
,
1164 .get_acl
= cifs_get_acl
,
1165 .set_acl
= cifs_set_acl
,
1168 const char *cifs_get_link(struct dentry
*dentry
, struct inode
*inode
,
1169 struct delayed_call
*done
)
1174 return ERR_PTR(-ECHILD
);
1176 target_path
= kmalloc(PATH_MAX
, GFP_KERNEL
);
1178 return ERR_PTR(-ENOMEM
);
1180 spin_lock(&inode
->i_lock
);
1181 if (likely(CIFS_I(inode
)->symlink_target
)) {
1182 strscpy(target_path
, CIFS_I(inode
)->symlink_target
, PATH_MAX
);
1185 target_path
= ERR_PTR(-EOPNOTSUPP
);
1187 spin_unlock(&inode
->i_lock
);
1189 if (!IS_ERR(target_path
))
1190 set_delayed_call(done
, kfree_link
, target_path
);
1195 const struct inode_operations cifs_symlink_inode_ops
= {
1196 .get_link
= cifs_get_link
,
1197 .setattr
= cifs_setattr
,
1198 .permission
= cifs_permission
,
1199 .listxattr
= cifs_listxattr
,
1203 * Advance the EOF marker to after the source range.
1205 static int cifs_precopy_set_eof(struct inode
*src_inode
, struct cifsInodeInfo
*src_cifsi
,
1206 struct cifs_tcon
*src_tcon
,
1207 unsigned int xid
, loff_t src_end
)
1209 struct cifsFileInfo
*writeable_srcfile
;
1212 writeable_srcfile
= find_writable_file(src_cifsi
, FIND_WR_FSUID_ONLY
);
1213 if (writeable_srcfile
) {
1214 if (src_tcon
->ses
->server
->ops
->set_file_size
)
1215 rc
= src_tcon
->ses
->server
->ops
->set_file_size(
1216 xid
, src_tcon
, writeable_srcfile
,
1217 src_inode
->i_size
, true /* no need to set sparse */);
1220 cifsFileInfo_put(writeable_srcfile
);
1221 cifs_dbg(FYI
, "SetFSize for copychunk rc = %d\n", rc
);
1227 netfs_resize_file(&src_cifsi
->netfs
, src_end
, true);
1228 fscache_resize_cookie(cifs_inode_cookie(src_inode
), src_end
);
1232 return filemap_write_and_wait(src_inode
->i_mapping
);
1236 * Flush out either the folio that overlaps the beginning of a range in which
1237 * pos resides or the folio that overlaps the end of a range unless that folio
1238 * is entirely within the range we're going to invalidate. We extend the flush
1239 * bounds to encompass the folio.
1241 static int cifs_flush_folio(struct inode
*inode
, loff_t pos
, loff_t
*_fstart
, loff_t
*_fend
,
1244 struct folio
*folio
;
1245 unsigned long long fpos
, fend
;
1246 pgoff_t index
= pos
/ PAGE_SIZE
;
1250 folio
= filemap_get_folio(inode
->i_mapping
, index
);
1254 size
= folio_size(folio
);
1255 fpos
= folio_pos(folio
);
1256 fend
= fpos
+ size
- 1;
1257 *_fstart
= min_t(unsigned long long, *_fstart
, fpos
);
1258 *_fend
= max_t(unsigned long long, *_fend
, fend
);
1259 if ((first
&& pos
== fpos
) || (!first
&& pos
== fend
))
1262 rc
= filemap_write_and_wait_range(inode
->i_mapping
, fpos
, fend
);
1268 static loff_t
cifs_remap_file_range(struct file
*src_file
, loff_t off
,
1269 struct file
*dst_file
, loff_t destoff
, loff_t len
,
1270 unsigned int remap_flags
)
1272 struct inode
*src_inode
= file_inode(src_file
);
1273 struct inode
*target_inode
= file_inode(dst_file
);
1274 struct cifsInodeInfo
*src_cifsi
= CIFS_I(src_inode
);
1275 struct cifsInodeInfo
*target_cifsi
= CIFS_I(target_inode
);
1276 struct cifsFileInfo
*smb_file_src
= src_file
->private_data
;
1277 struct cifsFileInfo
*smb_file_target
= dst_file
->private_data
;
1278 struct cifs_tcon
*target_tcon
, *src_tcon
;
1279 unsigned long long destend
, fstart
, fend
, new_size
;
1283 if (remap_flags
& REMAP_FILE_DEDUP
)
1285 if (remap_flags
& ~REMAP_FILE_ADVISORY
)
1288 cifs_dbg(FYI
, "clone range\n");
1292 if (!smb_file_src
|| !smb_file_target
) {
1294 cifs_dbg(VFS
, "missing cifsFileInfo on copy range src file\n");
1298 src_tcon
= tlink_tcon(smb_file_src
->tlink
);
1299 target_tcon
= tlink_tcon(smb_file_target
->tlink
);
1302 * Note: cifs case is easier than btrfs since server responsible for
1303 * checks for proper open modes and file type and if it wants
1304 * server could even support copy of range where source = target
1306 lock_two_nondirectories(target_inode
, src_inode
);
1309 len
= src_inode
->i_size
- off
;
1311 cifs_dbg(FYI
, "clone range\n");
1313 /* Flush the source buffer */
1314 rc
= filemap_write_and_wait_range(src_inode
->i_mapping
, off
,
1319 /* The server-side copy will fail if the source crosses the EOF marker.
1320 * Advance the EOF marker after the flush above to the end of the range
1321 * if it's short of that.
1323 if (src_cifsi
->netfs
.remote_i_size
< off
+ len
) {
1324 rc
= cifs_precopy_set_eof(src_inode
, src_cifsi
, src_tcon
, xid
, off
+ len
);
1329 new_size
= destoff
+ len
;
1330 destend
= destoff
+ len
- 1;
1332 /* Flush the folios at either end of the destination range to prevent
1333 * accidental loss of dirty data outside of the range.
1338 rc
= cifs_flush_folio(target_inode
, destoff
, &fstart
, &fend
, true);
1341 rc
= cifs_flush_folio(target_inode
, destend
, &fstart
, &fend
, false);
1345 /* Discard all the folios that overlap the destination region. */
1346 cifs_dbg(FYI
, "about to discard pages %llx-%llx\n", fstart
, fend
);
1347 truncate_inode_pages_range(&target_inode
->i_data
, fstart
, fend
);
1349 fscache_invalidate(cifs_inode_cookie(target_inode
), NULL
,
1350 i_size_read(target_inode
), 0);
1353 if (target_tcon
->ses
->server
->ops
->duplicate_extents
) {
1354 rc
= target_tcon
->ses
->server
->ops
->duplicate_extents(xid
,
1355 smb_file_src
, smb_file_target
, off
, len
, destoff
);
1356 if (rc
== 0 && new_size
> i_size_read(target_inode
)) {
1357 truncate_setsize(target_inode
, new_size
);
1358 netfs_resize_file(&target_cifsi
->netfs
, new_size
, true);
1359 fscache_resize_cookie(cifs_inode_cookie(target_inode
),
1364 /* force revalidate of size and timestamps of target file now
1365 that target is updated on the server */
1366 CIFS_I(target_inode
)->time
= 0;
1368 /* although unlocking in the reverse order from locking is not
1369 strictly necessary here it is a little cleaner to be consistent */
1370 unlock_two_nondirectories(src_inode
, target_inode
);
1373 return rc
< 0 ? rc
: len
;
1376 ssize_t
cifs_file_copychunk_range(unsigned int xid
,
1377 struct file
*src_file
, loff_t off
,
1378 struct file
*dst_file
, loff_t destoff
,
1379 size_t len
, unsigned int flags
)
1381 struct inode
*src_inode
= file_inode(src_file
);
1382 struct inode
*target_inode
= file_inode(dst_file
);
1383 struct cifsInodeInfo
*src_cifsi
= CIFS_I(src_inode
);
1384 struct cifsInodeInfo
*target_cifsi
= CIFS_I(target_inode
);
1385 struct cifsFileInfo
*smb_file_src
;
1386 struct cifsFileInfo
*smb_file_target
;
1387 struct cifs_tcon
*src_tcon
;
1388 struct cifs_tcon
*target_tcon
;
1389 unsigned long long destend
, fstart
, fend
;
1392 cifs_dbg(FYI
, "copychunk range\n");
1394 if (!src_file
->private_data
|| !dst_file
->private_data
) {
1396 cifs_dbg(VFS
, "missing cifsFileInfo on copy range src file\n");
1401 smb_file_target
= dst_file
->private_data
;
1402 smb_file_src
= src_file
->private_data
;
1403 src_tcon
= tlink_tcon(smb_file_src
->tlink
);
1404 target_tcon
= tlink_tcon(smb_file_target
->tlink
);
1406 if (src_tcon
->ses
!= target_tcon
->ses
) {
1407 cifs_dbg(VFS
, "source and target of copy not on same server\n");
1412 if (!target_tcon
->ses
->server
->ops
->copychunk_range
)
1416 * Note: cifs case is easier than btrfs since server responsible for
1417 * checks for proper open modes and file type and if it wants
1418 * server could even support copy of range where source = target
1420 lock_two_nondirectories(target_inode
, src_inode
);
1422 cifs_dbg(FYI
, "about to flush pages\n");
1424 rc
= filemap_write_and_wait_range(src_inode
->i_mapping
, off
,
1429 /* The server-side copy will fail if the source crosses the EOF marker.
1430 * Advance the EOF marker after the flush above to the end of the range
1431 * if it's short of that.
1433 if (src_cifsi
->netfs
.remote_i_size
< off
+ len
) {
1434 rc
= cifs_precopy_set_eof(src_inode
, src_cifsi
, src_tcon
, xid
, off
+ len
);
1439 destend
= destoff
+ len
- 1;
1441 /* Flush the folios at either end of the destination range to prevent
1442 * accidental loss of dirty data outside of the range.
1447 rc
= cifs_flush_folio(target_inode
, destoff
, &fstart
, &fend
, true);
1450 rc
= cifs_flush_folio(target_inode
, destend
, &fstart
, &fend
, false);
1454 /* Discard all the folios that overlap the destination region. */
1455 truncate_inode_pages_range(&target_inode
->i_data
, fstart
, fend
);
1457 fscache_invalidate(cifs_inode_cookie(target_inode
), NULL
,
1458 i_size_read(target_inode
), 0);
1460 rc
= file_modified(dst_file
);
1462 rc
= target_tcon
->ses
->server
->ops
->copychunk_range(xid
,
1463 smb_file_src
, smb_file_target
, off
, len
, destoff
);
1464 if (rc
> 0 && destoff
+ rc
> i_size_read(target_inode
)) {
1465 truncate_setsize(target_inode
, destoff
+ rc
);
1466 netfs_resize_file(&target_cifsi
->netfs
,
1467 i_size_read(target_inode
), true);
1468 fscache_resize_cookie(cifs_inode_cookie(target_inode
),
1469 i_size_read(target_inode
));
1471 if (rc
> 0 && destoff
+ rc
> target_cifsi
->netfs
.zero_point
)
1472 target_cifsi
->netfs
.zero_point
= destoff
+ rc
;
1475 file_accessed(src_file
);
1477 /* force revalidate of size and timestamps of target file now
1478 * that target is updated on the server
1480 CIFS_I(target_inode
)->time
= 0;
1483 /* although unlocking in the reverse order from locking is not
1484 * strictly necessary here it is a little cleaner to be consistent
1486 unlock_two_nondirectories(src_inode
, target_inode
);
1493 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1494 * is a dummy operation.
1496 static int cifs_dir_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
1498 cifs_dbg(FYI
, "Sync directory - name: %pD datasync: 0x%x\n",
1504 static ssize_t
cifs_copy_file_range(struct file
*src_file
, loff_t off
,
1505 struct file
*dst_file
, loff_t destoff
,
1506 size_t len
, unsigned int flags
)
1508 unsigned int xid
= get_xid();
1510 struct cifsFileInfo
*cfile
= dst_file
->private_data
;
1512 if (cfile
->swapfile
) {
1518 rc
= cifs_file_copychunk_range(xid
, src_file
, off
, dst_file
, destoff
,
1522 if (rc
== -EOPNOTSUPP
|| rc
== -EXDEV
)
1523 rc
= splice_copy_file_range(src_file
, off
, dst_file
,
1528 const struct file_operations cifs_file_ops
= {
1529 .read_iter
= cifs_loose_read_iter
,
1530 .write_iter
= cifs_file_write_iter
,
1532 .release
= cifs_close
,
1534 .flock
= cifs_flock
,
1535 .fsync
= cifs_fsync
,
1536 .flush
= cifs_flush
,
1537 .mmap
= cifs_file_mmap
,
1538 .splice_read
= filemap_splice_read
,
1539 .splice_write
= iter_file_splice_write
,
1540 .llseek
= cifs_llseek
,
1541 .unlocked_ioctl
= cifs_ioctl
,
1542 .copy_file_range
= cifs_copy_file_range
,
1543 .remap_file_range
= cifs_remap_file_range
,
1544 .setlease
= cifs_setlease
,
1545 .fallocate
= cifs_fallocate
,
1548 const struct file_operations cifs_file_strict_ops
= {
1549 .read_iter
= cifs_strict_readv
,
1550 .write_iter
= cifs_strict_writev
,
1552 .release
= cifs_close
,
1554 .flock
= cifs_flock
,
1555 .fsync
= cifs_strict_fsync
,
1556 .flush
= cifs_flush
,
1557 .mmap
= cifs_file_strict_mmap
,
1558 .splice_read
= filemap_splice_read
,
1559 .splice_write
= iter_file_splice_write
,
1560 .llseek
= cifs_llseek
,
1561 .unlocked_ioctl
= cifs_ioctl
,
1562 .copy_file_range
= cifs_copy_file_range
,
1563 .remap_file_range
= cifs_remap_file_range
,
1564 .setlease
= cifs_setlease
,
1565 .fallocate
= cifs_fallocate
,
1568 const struct file_operations cifs_file_direct_ops
= {
1569 .read_iter
= cifs_direct_readv
,
1570 .write_iter
= cifs_direct_writev
,
1572 .release
= cifs_close
,
1574 .flock
= cifs_flock
,
1575 .fsync
= cifs_fsync
,
1576 .flush
= cifs_flush
,
1577 .mmap
= cifs_file_mmap
,
1578 .splice_read
= copy_splice_read
,
1579 .splice_write
= iter_file_splice_write
,
1580 .unlocked_ioctl
= cifs_ioctl
,
1581 .copy_file_range
= cifs_copy_file_range
,
1582 .remap_file_range
= cifs_remap_file_range
,
1583 .llseek
= cifs_llseek
,
1584 .setlease
= cifs_setlease
,
1585 .fallocate
= cifs_fallocate
,
1588 const struct file_operations cifs_file_nobrl_ops
= {
1589 .read_iter
= cifs_loose_read_iter
,
1590 .write_iter
= cifs_file_write_iter
,
1592 .release
= cifs_close
,
1593 .fsync
= cifs_fsync
,
1594 .flush
= cifs_flush
,
1595 .mmap
= cifs_file_mmap
,
1596 .splice_read
= filemap_splice_read
,
1597 .splice_write
= iter_file_splice_write
,
1598 .llseek
= cifs_llseek
,
1599 .unlocked_ioctl
= cifs_ioctl
,
1600 .copy_file_range
= cifs_copy_file_range
,
1601 .remap_file_range
= cifs_remap_file_range
,
1602 .setlease
= cifs_setlease
,
1603 .fallocate
= cifs_fallocate
,
1606 const struct file_operations cifs_file_strict_nobrl_ops
= {
1607 .read_iter
= cifs_strict_readv
,
1608 .write_iter
= cifs_strict_writev
,
1610 .release
= cifs_close
,
1611 .fsync
= cifs_strict_fsync
,
1612 .flush
= cifs_flush
,
1613 .mmap
= cifs_file_strict_mmap
,
1614 .splice_read
= filemap_splice_read
,
1615 .splice_write
= iter_file_splice_write
,
1616 .llseek
= cifs_llseek
,
1617 .unlocked_ioctl
= cifs_ioctl
,
1618 .copy_file_range
= cifs_copy_file_range
,
1619 .remap_file_range
= cifs_remap_file_range
,
1620 .setlease
= cifs_setlease
,
1621 .fallocate
= cifs_fallocate
,
1624 const struct file_operations cifs_file_direct_nobrl_ops
= {
1625 .read_iter
= cifs_direct_readv
,
1626 .write_iter
= cifs_direct_writev
,
1628 .release
= cifs_close
,
1629 .fsync
= cifs_fsync
,
1630 .flush
= cifs_flush
,
1631 .mmap
= cifs_file_mmap
,
1632 .splice_read
= copy_splice_read
,
1633 .splice_write
= iter_file_splice_write
,
1634 .unlocked_ioctl
= cifs_ioctl
,
1635 .copy_file_range
= cifs_copy_file_range
,
1636 .remap_file_range
= cifs_remap_file_range
,
1637 .llseek
= cifs_llseek
,
1638 .setlease
= cifs_setlease
,
1639 .fallocate
= cifs_fallocate
,
1642 const struct file_operations cifs_dir_ops
= {
1643 .iterate_shared
= cifs_readdir
,
1644 .release
= cifs_closedir
,
1645 .read
= generic_read_dir
,
1646 .unlocked_ioctl
= cifs_ioctl
,
1647 .copy_file_range
= cifs_copy_file_range
,
1648 .remap_file_range
= cifs_remap_file_range
,
1649 .llseek
= generic_file_llseek
,
1650 .fsync
= cifs_dir_fsync
,
1654 cifs_init_once(void *inode
)
1656 struct cifsInodeInfo
*cifsi
= inode
;
1658 inode_init_once(&cifsi
->netfs
.inode
);
1659 init_rwsem(&cifsi
->lock_sem
);
1663 cifs_init_inodecache(void)
1665 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
1666 sizeof(struct cifsInodeInfo
),
1667 0, (SLAB_RECLAIM_ACCOUNT
|
1670 if (cifs_inode_cachep
== NULL
)
1677 cifs_destroy_inodecache(void)
1680 * Make sure all delayed rcu free inodes are flushed before we
1684 kmem_cache_destroy(cifs_inode_cachep
);
1688 cifs_init_request_bufs(void)
1691 * SMB2 maximum header size is bigger than CIFS one - no problems to
1692 * allocate some more bytes for CIFS.
1694 size_t max_hdr_size
= MAX_SMB2_HDR_SIZE
;
1696 if (CIFSMaxBufSize
< 8192) {
1697 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1698 Unicode path name has to fit in any SMB/CIFS path based frames */
1699 CIFSMaxBufSize
= 8192;
1700 } else if (CIFSMaxBufSize
> 1024*127) {
1701 CIFSMaxBufSize
= 1024 * 127;
1703 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
1706 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1707 CIFSMaxBufSize, CIFSMaxBufSize);
1709 cifs_req_cachep
= kmem_cache_create_usercopy("cifs_request",
1710 CIFSMaxBufSize
+ max_hdr_size
, 0,
1711 SLAB_HWCACHE_ALIGN
, 0,
1712 CIFSMaxBufSize
+ max_hdr_size
,
1714 if (cifs_req_cachep
== NULL
)
1717 if (cifs_min_rcv
< 1)
1719 else if (cifs_min_rcv
> 64) {
1721 cifs_dbg(VFS
, "cifs_min_rcv set to maximum (64)\n");
1724 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
1727 if (cifs_req_poolp
== NULL
) {
1728 kmem_cache_destroy(cifs_req_cachep
);
1731 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1732 almost all handle based requests (but not write response, nor is it
1733 sufficient for path based requests). A smaller size would have
1734 been more efficient (compacting multiple slab items on one 4k page)
1735 for the case in which debug was on, but this larger size allows
1736 more SMBs to use small buffer alloc and is still much more
1737 efficient to alloc 1 per page off the slab compared to 17K (5page)
1738 alloc of large cifs buffers even when page debugging is on */
1739 cifs_sm_req_cachep
= kmem_cache_create_usercopy("cifs_small_rq",
1740 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
1741 0, MAX_CIFS_SMALL_BUFFER_SIZE
, NULL
);
1742 if (cifs_sm_req_cachep
== NULL
) {
1743 mempool_destroy(cifs_req_poolp
);
1744 kmem_cache_destroy(cifs_req_cachep
);
1748 if (cifs_min_small
< 2)
1750 else if (cifs_min_small
> 256) {
1751 cifs_min_small
= 256;
1752 cifs_dbg(FYI
, "cifs_min_small set to maximum (256)\n");
1755 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
1756 cifs_sm_req_cachep
);
1758 if (cifs_sm_req_poolp
== NULL
) {
1759 mempool_destroy(cifs_req_poolp
);
1760 kmem_cache_destroy(cifs_req_cachep
);
1761 kmem_cache_destroy(cifs_sm_req_cachep
);
1769 cifs_destroy_request_bufs(void)
1771 mempool_destroy(cifs_req_poolp
);
1772 kmem_cache_destroy(cifs_req_cachep
);
1773 mempool_destroy(cifs_sm_req_poolp
);
1774 kmem_cache_destroy(cifs_sm_req_cachep
);
1777 static int init_mids(void)
1779 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
1780 sizeof(struct mid_q_entry
), 0,
1781 SLAB_HWCACHE_ALIGN
, NULL
);
1782 if (cifs_mid_cachep
== NULL
)
1785 /* 3 is a reasonable minimum number of simultaneous operations */
1786 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
1787 if (cifs_mid_poolp
== NULL
) {
1788 kmem_cache_destroy(cifs_mid_cachep
);
1795 static void destroy_mids(void)
1797 mempool_destroy(cifs_mid_poolp
);
1798 kmem_cache_destroy(cifs_mid_cachep
);
1806 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
1808 * Initialize Global counters
1810 atomic_set(&sesInfoAllocCount
, 0);
1811 atomic_set(&tconInfoAllocCount
, 0);
1812 atomic_set(&tcpSesNextId
, 0);
1813 atomic_set(&tcpSesAllocCount
, 0);
1814 atomic_set(&tcpSesReconnectCount
, 0);
1815 atomic_set(&tconInfoReconnectCount
, 0);
1817 atomic_set(&buf_alloc_count
, 0);
1818 atomic_set(&small_buf_alloc_count
, 0);
1819 #ifdef CONFIG_CIFS_STATS2
1820 atomic_set(&total_buf_alloc_count
, 0);
1821 atomic_set(&total_small_buf_alloc_count
, 0);
1822 if (slow_rsp_threshold
< 1)
1823 cifs_dbg(FYI
, "slow_response_threshold msgs disabled\n");
1824 else if (slow_rsp_threshold
> 32767)
1826 "slow response threshold set higher than recommended (0 to 32767)\n");
1827 #endif /* CONFIG_CIFS_STATS2 */
1829 atomic_set(&mid_count
, 0);
1830 GlobalCurrentXid
= 0;
1831 GlobalTotalActiveXid
= 0;
1832 GlobalMaxActiveXid
= 0;
1833 spin_lock_init(&cifs_tcp_ses_lock
);
1834 spin_lock_init(&GlobalMid_Lock
);
1836 cifs_lock_secret
= get_random_u32();
1838 if (cifs_max_pending
< 2) {
1839 cifs_max_pending
= 2;
1840 cifs_dbg(FYI
, "cifs_max_pending set to min of 2\n");
1841 } else if (cifs_max_pending
> CIFS_MAX_REQ
) {
1842 cifs_max_pending
= CIFS_MAX_REQ
;
1843 cifs_dbg(FYI
, "cifs_max_pending set to max of %u\n",
1847 /* Limit max to about 18 hours, and setting to zero disables directory entry caching */
1848 if (dir_cache_timeout
> 65000) {
1849 dir_cache_timeout
= 65000;
1850 cifs_dbg(VFS
, "dir_cache_timeout set to max of 65000 seconds\n");
1853 cifsiod_wq
= alloc_workqueue("cifsiod", WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1856 goto out_clean_proc
;
1860 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
1861 * so that we don't launch too many worker threads but
1862 * Documentation/core-api/workqueue.rst recommends setting it to 0
1865 /* WQ_UNBOUND allows decrypt tasks to run on any CPU */
1866 decrypt_wq
= alloc_workqueue("smb3decryptd",
1867 WQ_UNBOUND
|WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1870 goto out_destroy_cifsiod_wq
;
1873 fileinfo_put_wq
= alloc_workqueue("cifsfileinfoput",
1874 WQ_UNBOUND
|WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1875 if (!fileinfo_put_wq
) {
1877 goto out_destroy_decrypt_wq
;
1880 cifsoplockd_wq
= alloc_workqueue("cifsoplockd",
1881 WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1882 if (!cifsoplockd_wq
) {
1884 goto out_destroy_fileinfo_put_wq
;
1887 deferredclose_wq
= alloc_workqueue("deferredclose",
1888 WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1889 if (!deferredclose_wq
) {
1891 goto out_destroy_cifsoplockd_wq
;
1894 serverclose_wq
= alloc_workqueue("serverclose",
1895 WQ_FREEZABLE
|WQ_MEM_RECLAIM
, 0);
1896 if (!serverclose_wq
) {
1898 goto out_destroy_serverclose_wq
;
1901 rc
= cifs_init_inodecache();
1903 goto out_destroy_deferredclose_wq
;
1907 goto out_destroy_inodecache
;
1909 rc
= cifs_init_request_bufs();
1911 goto out_destroy_mids
;
1913 #ifdef CONFIG_CIFS_DFS_UPCALL
1914 rc
= dfs_cache_init();
1916 goto out_destroy_request_bufs
;
1917 #endif /* CONFIG_CIFS_DFS_UPCALL */
1918 #ifdef CONFIG_CIFS_UPCALL
1919 rc
= init_cifs_spnego();
1921 goto out_destroy_dfs_cache
;
1922 #endif /* CONFIG_CIFS_UPCALL */
1923 #ifdef CONFIG_CIFS_SWN_UPCALL
1924 rc
= cifs_genl_init();
1926 goto out_register_key_type
;
1927 #endif /* CONFIG_CIFS_SWN_UPCALL */
1929 rc
= init_cifs_idmap();
1931 goto out_cifs_swn_init
;
1933 rc
= register_filesystem(&cifs_fs_type
);
1935 goto out_init_cifs_idmap
;
1937 rc
= register_filesystem(&smb3_fs_type
);
1939 unregister_filesystem(&cifs_fs_type
);
1940 goto out_init_cifs_idmap
;
1945 out_init_cifs_idmap
:
1948 #ifdef CONFIG_CIFS_SWN_UPCALL
1950 out_register_key_type
:
1952 #ifdef CONFIG_CIFS_UPCALL
1954 out_destroy_dfs_cache
:
1956 #ifdef CONFIG_CIFS_DFS_UPCALL
1957 dfs_cache_destroy();
1958 out_destroy_request_bufs
:
1960 cifs_destroy_request_bufs();
1963 out_destroy_inodecache
:
1964 cifs_destroy_inodecache();
1965 out_destroy_deferredclose_wq
:
1966 destroy_workqueue(deferredclose_wq
);
1967 out_destroy_cifsoplockd_wq
:
1968 destroy_workqueue(cifsoplockd_wq
);
1969 out_destroy_fileinfo_put_wq
:
1970 destroy_workqueue(fileinfo_put_wq
);
1971 out_destroy_decrypt_wq
:
1972 destroy_workqueue(decrypt_wq
);
1973 out_destroy_cifsiod_wq
:
1974 destroy_workqueue(cifsiod_wq
);
1975 out_destroy_serverclose_wq
:
1976 destroy_workqueue(serverclose_wq
);
1985 cifs_dbg(NOISY
, "exit_smb3\n");
1986 unregister_filesystem(&cifs_fs_type
);
1987 unregister_filesystem(&smb3_fs_type
);
1988 cifs_release_automount_timer();
1990 #ifdef CONFIG_CIFS_SWN_UPCALL
1993 #ifdef CONFIG_CIFS_UPCALL
1996 #ifdef CONFIG_CIFS_DFS_UPCALL
1997 dfs_cache_destroy();
1999 cifs_destroy_request_bufs();
2001 cifs_destroy_inodecache();
2002 destroy_workqueue(deferredclose_wq
);
2003 destroy_workqueue(cifsoplockd_wq
);
2004 destroy_workqueue(decrypt_wq
);
2005 destroy_workqueue(fileinfo_put_wq
);
2006 destroy_workqueue(serverclose_wq
);
2007 destroy_workqueue(cifsiod_wq
);
2011 MODULE_AUTHOR("Steve French");
2012 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
2014 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
2015 "also older servers complying with the SNIA CIFS Specification)");
2016 MODULE_VERSION(CIFS_VERSION
);
2017 MODULE_SOFTDEP("ecb");
2018 MODULE_SOFTDEP("hmac");
2019 MODULE_SOFTDEP("md5");
2020 MODULE_SOFTDEP("nls");
2021 MODULE_SOFTDEP("aes");
2022 MODULE_SOFTDEP("cmac");
2023 MODULE_SOFTDEP("sha256");
2024 MODULE_SOFTDEP("sha512");
2025 MODULE_SOFTDEP("aead2");
2026 MODULE_SOFTDEP("ccm");
2027 MODULE_SOFTDEP("gcm");
2028 module_init(init_cifs
)
2029 module_exit(exit_cifs
)