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)
6 * Jeremy Allison (jra@samba.org)
13 #include <linux/in6.h>
14 #include <linux/inet.h>
15 #include <linux/slab.h>
16 #include <linux/mempool.h>
17 #include <linux/workqueue.h>
18 #include <linux/utsname.h>
19 #include <linux/sched/mm.h>
20 #include <linux/netfs.h>
21 #include "cifs_fs_sb.h"
23 #include <crypto/internal/hash.h>
24 #include <linux/scatterlist.h>
25 #include <uapi/linux/cifs/cifs_mount.h>
26 #include "../smbfs_common/smb2pdu.h"
29 #define SMB_PATH_MAX 260
31 #define RFC1001_PORT 139
34 * The sizes of various internal tables and strings
36 #define MAX_UID_INFO 16
37 #define MAX_SES_INFO 2
38 #define MAX_TCON_INFO 4
40 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
42 #define CIFS_MIN_RCV_POOL 4
44 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
46 * default attribute cache timeout (jiffies)
48 #define CIFS_DEF_ACTIMEO (1 * HZ)
51 * max attribute cache timeout (jiffies) - 2^30
53 #define CIFS_MAX_ACTIMEO (1 << 30)
56 * Max persistent and resilient handle timeout (milliseconds).
57 * Windows durable max was 960000 (16 minutes)
59 #define SMB3_MAX_HANDLE_TIMEOUT 960000
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* maximum length of ip addr as a string (including ipv6 and sctp) */
71 #define SERVER_NAME_LENGTH 80
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* echo interval in seconds */
75 #define SMB_ECHO_INTERVAL_MIN 1
76 #define SMB_ECHO_INTERVAL_MAX 600
77 #define SMB_ECHO_INTERVAL_DEFAULT 60
79 /* dns resolution intervals in seconds */
80 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
81 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
83 /* maximum number of PDUs in one compound */
84 #define MAX_COMPOUND 5
87 * Default number of credits to keep available for SMB3.
88 * This value is chosen somewhat arbitrarily. The Windows client
89 * defaults to 128 credits, the Windows server allows clients up to
90 * 512 credits (or 8K for later versions), and the NetApp server
91 * does not limit clients at all. Choose a high enough default value
92 * such that the client shouldn't limit performance, but allow mount
93 * to override (until you approach 64K, where we limit credits to 65000
94 * to reduce possibility of seeing more server credit overflow bugs.
96 #define SMB2_MAX_CREDITS_AVAILABLE 32000
100 #ifndef XATTR_DOS_ATTRIB
101 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
104 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
107 * CIFS vfs client Status information (based on what we know.)
110 /* associated with each connection */
120 /* associated with each smb session */
121 enum ses_status_enum {
129 /* associated with each tree connection to the server */
130 enum tid_status_enum {
137 TID_NEED_FILES_INVALIDATE, /* currently unused */
138 TID_IN_FILES_INVALIDATE
142 Unspecified = 0, /* not specified */
143 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
144 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
145 Kerberos, /* Kerberos via SPNEGO */
153 /* crypto security descriptor definition */
155 struct shash_desc shash;
159 /* crypto hashing related structure/fields, not specific to a sec mech */
160 struct cifs_secmech {
161 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
162 struct crypto_shash *md5; /* md5 hash function */
163 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
164 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
165 struct crypto_shash *sha512; /* sha512 hash function */
166 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
167 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
168 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
169 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
170 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
171 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
172 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
175 /* per smb session structure/fields */
176 struct ntlmssp_auth {
177 bool sesskey_per_smbsess; /* whether session key is per smb session */
178 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
179 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
180 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
181 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
189 struct cifs_sid osid;
190 struct cifs_sid gsid;
191 struct cifs_ntace *ntaces;
192 struct cifs_ace *aces;
196 *****************************************************************
197 * Except the CIFS PDUs themselves all the
198 * globally interesting structs should go here
199 *****************************************************************
203 * A smb_rqst represents a complete request to be issued to a server. It's
204 * formed by a kvec array, followed by an array of pages. Page data is assumed
205 * to start at the beginning of the first page.
208 struct kvec *rq_iov; /* array of kvecs */
209 unsigned int rq_nvec; /* number of kvecs in array */
210 struct page **rq_pages; /* pointer to array of page ptrs */
211 unsigned int rq_offset; /* the offset to the 1st page */
212 unsigned int rq_npages; /* number pages in array */
213 unsigned int rq_pagesz; /* page size to use */
214 unsigned int rq_tailsz; /* length of last page */
218 struct TCP_Server_Info;
222 struct dfs_info3_param;
224 struct smb3_fs_context;
226 struct cifs_readdata;
227 struct cifs_writedata;
228 struct cifs_io_parms;
229 struct cifs_search_info;
230 struct cifsInodeInfo;
231 struct cifs_open_parms;
234 struct smb_version_operations {
235 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
236 struct mid_q_entry *);
237 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
238 /* setup request: allocate mid, sign message */
239 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
240 struct TCP_Server_Info *,
242 /* setup async request: allocate mid, sign message */
243 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
245 /* check response: verify signature, map error */
246 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
248 void (*add_credits)(struct TCP_Server_Info *server,
249 const struct cifs_credits *credits,
251 void (*set_credits)(struct TCP_Server_Info *, const int);
252 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
253 unsigned int (*get_credits)(struct mid_q_entry *);
254 __u64 (*get_next_mid)(struct TCP_Server_Info *);
255 void (*revert_current_mid)(struct TCP_Server_Info *server,
256 const unsigned int val);
257 /* data offset from read response message */
258 unsigned int (*read_data_offset)(char *);
260 * Data length from read response message
261 * When in_remaining is true, the returned data length is in
262 * message field DataRemaining for out-of-band data read (e.g through
263 * Memory Registration RDMA write in SMBD).
264 * Otherwise, the returned data length is in message field DataLength.
266 unsigned int (*read_data_length)(char *, bool in_remaining);
267 /* map smb to linux error */
268 int (*map_error)(char *, bool);
269 /* find mid corresponding to the response message */
270 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
271 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
272 void (*clear_stats)(struct cifs_tcon *);
273 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
274 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
275 /* verify the message */
276 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
277 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
278 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
279 void (*downgrade_oplock)(struct TCP_Server_Info *server,
280 struct cifsInodeInfo *cinode, __u32 oplock,
281 unsigned int epoch, bool *purge_cache);
282 /* process transaction2 response */
283 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
285 /* check if we need to negotiate */
286 bool (*need_neg)(struct TCP_Server_Info *);
287 /* negotiate to the server */
288 int (*negotiate)(const unsigned int xid,
289 struct cifs_ses *ses,
290 struct TCP_Server_Info *server);
291 /* set negotiated write size */
292 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
293 /* set negotiated read size */
294 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
295 /* setup smb sessionn */
296 int (*sess_setup)(const unsigned int, struct cifs_ses *,
297 struct TCP_Server_Info *server,
298 const struct nls_table *);
299 /* close smb session */
300 int (*logoff)(const unsigned int, struct cifs_ses *);
301 /* connect to a server share */
302 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
303 struct cifs_tcon *, const struct nls_table *);
304 /* close tree connecion */
305 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
306 /* get DFS referrals */
307 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
308 const char *, struct dfs_info3_param **,
309 unsigned int *, const struct nls_table *, int);
310 /* informational QFS call */
311 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
312 struct cifs_sb_info *);
313 /* check if a path is accessible or not */
314 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
315 struct cifs_sb_info *, const char *);
316 /* query path data from the server */
317 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
318 struct cifs_sb_info *, const char *,
319 FILE_ALL_INFO *, bool *, bool *);
320 /* query file data from the server */
321 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
322 struct cifs_fid *, FILE_ALL_INFO *);
323 /* query reparse tag from srv to determine which type of special file */
324 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
325 struct cifs_sb_info *cifs_sb, const char *path,
327 /* get server index number */
328 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
329 struct cifs_sb_info *, const char *,
330 u64 *uniqueid, FILE_ALL_INFO *);
331 /* set size by path */
332 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
333 const char *, __u64, struct cifs_sb_info *, bool);
334 /* set size by file handle */
335 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
336 struct cifsFileInfo *, __u64, bool);
338 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
340 int (*set_compression)(const unsigned int, struct cifs_tcon *,
341 struct cifsFileInfo *);
342 /* check if we can send an echo or nor */
343 bool (*can_echo)(struct TCP_Server_Info *);
344 /* send echo request */
345 int (*echo)(struct TCP_Server_Info *);
346 /* create directory */
347 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
348 umode_t mode, struct cifs_tcon *tcon,
349 const char *full_path,
350 struct cifs_sb_info *cifs_sb);
351 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
352 struct cifs_tcon *tcon, const char *name,
353 struct cifs_sb_info *sb);
354 /* set info on created directory */
355 void (*mkdir_setinfo)(struct inode *, const char *,
356 struct cifs_sb_info *, struct cifs_tcon *,
358 /* remove directory */
359 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
360 struct cifs_sb_info *);
362 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
363 struct cifs_sb_info *);
364 /* open, rename and delete file */
365 int (*rename_pending_delete)(const char *, struct dentry *,
367 /* send rename request */
368 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
369 const char *, struct cifs_sb_info *);
370 /* send create hardlink request */
371 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
372 const char *, const char *,
373 struct cifs_sb_info *);
374 /* query symlink target */
375 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
376 struct cifs_sb_info *, const char *,
378 /* open a file for non-posix mounts */
379 int (*open)(const unsigned int, struct cifs_open_parms *,
380 __u32 *, FILE_ALL_INFO *);
381 /* set fid protocol-specific info */
382 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
384 void (*close)(const unsigned int, struct cifs_tcon *,
386 /* close a file, returning file attributes and timestamps */
387 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
388 struct cifsFileInfo *pfile_info);
389 /* send a flush request to the server */
390 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
391 /* async read from the server */
392 int (*async_readv)(struct cifs_readdata *);
393 /* async write to the server */
394 int (*async_writev)(struct cifs_writedata *,
395 void (*release)(struct kref *));
396 /* sync read from the server */
397 int (*sync_read)(const unsigned int, struct cifs_fid *,
398 struct cifs_io_parms *, unsigned int *, char **,
400 /* sync write to the server */
401 int (*sync_write)(const unsigned int, struct cifs_fid *,
402 struct cifs_io_parms *, unsigned int *, struct kvec *,
404 /* open dir, start readdir */
405 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
406 const char *, struct cifs_sb_info *,
407 struct cifs_fid *, __u16,
408 struct cifs_search_info *);
409 /* continue readdir */
410 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
412 __u16, struct cifs_search_info *srch_inf);
414 int (*close_dir)(const unsigned int, struct cifs_tcon *,
416 /* calculate a size of SMB message */
417 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
418 /* check for STATUS_PENDING and process the response if yes */
419 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
420 /* check for STATUS_NETWORK_SESSION_EXPIRED */
421 bool (*is_session_expired)(char *);
422 /* send oplock break response */
423 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
424 struct cifsInodeInfo *);
425 /* query remote filesystem */
426 int (*queryfs)(const unsigned int, struct cifs_tcon *,
427 struct cifs_sb_info *, struct kstatfs *);
428 /* send mandatory brlock to the server */
429 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
430 __u64, __u32, int, int, bool);
431 /* unlock range of mandatory locks */
432 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
434 /* push brlocks from the cache to the server */
435 int (*push_mand_locks)(struct cifsFileInfo *);
436 /* get lease key of the inode */
437 void (*get_lease_key)(struct inode *, struct cifs_fid *);
438 /* set lease key of the inode */
439 void (*set_lease_key)(struct inode *, struct cifs_fid *);
440 /* generate new lease key */
441 void (*new_lease_key)(struct cifs_fid *);
442 int (*generate_signingkey)(struct cifs_ses *ses,
443 struct TCP_Server_Info *server);
444 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
445 bool allocate_crypto);
446 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
447 struct cifsFileInfo *src_file);
448 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
449 struct cifsFileInfo *src_file, void __user *);
450 int (*notify)(const unsigned int xid, struct file *pfile,
452 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
453 struct cifs_sb_info *, const unsigned char *,
454 char *, unsigned int *);
455 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
456 struct cifs_sb_info *, const unsigned char *,
457 char *, unsigned int *);
458 /* if we can do cache read operations */
459 bool (*is_read_op)(__u32);
460 /* set oplock level for the inode */
461 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
463 /* create lease context buffer for CREATE request */
464 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
465 /* parse lease context buffer and return oplock/epoch info */
466 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
467 ssize_t (*copychunk_range)(const unsigned int,
468 struct cifsFileInfo *src_file,
469 struct cifsFileInfo *target_file,
470 u64 src_off, u64 len, u64 dest_off);
471 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
472 struct cifsFileInfo *target_file, u64 src_off, u64 len,
474 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
475 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
476 const unsigned char *, const unsigned char *, char *,
477 size_t, struct cifs_sb_info *);
478 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
479 const char *, const void *, const __u16,
480 const struct nls_table *, struct cifs_sb_info *);
481 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
482 const char *, u32 *, u32);
483 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
484 const struct cifs_fid *, u32 *, u32);
485 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
487 /* writepages retry size */
488 unsigned int (*wp_retry_size)(struct inode *);
489 /* get mtu credits */
490 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
491 unsigned int *, struct cifs_credits *);
492 /* adjust previously taken mtu credits to request size */
493 int (*adjust_credits)(struct TCP_Server_Info *server,
494 struct cifs_credits *credits,
495 const unsigned int payload_size);
496 /* check if we need to issue closedir */
497 bool (*dir_needs_close)(struct cifsFileInfo *);
498 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
500 /* init transform request - used for encryption for now */
501 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
502 struct smb_rqst *, struct smb_rqst *);
503 int (*is_transform_hdr)(void *buf);
504 int (*receive_transform)(struct TCP_Server_Info *,
505 struct mid_q_entry **, char **, int *);
506 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
508 int (*next_header)(char *);
509 /* ioctl passthrough for query_info */
510 int (*ioctl_query_info)(const unsigned int xid,
511 struct cifs_tcon *tcon,
512 struct cifs_sb_info *cifs_sb,
513 __le16 *path, int is_dir,
515 /* make unix special files (block, char, fifo, socket) */
516 int (*make_node)(unsigned int xid,
518 struct dentry *dentry,
519 struct cifs_tcon *tcon,
520 const char *full_path,
522 dev_t device_number);
523 /* version specific fiemap implementation */
524 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
525 struct fiemap_extent_info *, u64, u64);
526 /* version specific llseek implementation */
527 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
528 /* Check for STATUS_IO_TIMEOUT */
529 bool (*is_status_io_timeout)(char *buf);
530 /* Check for STATUS_NETWORK_NAME_DELETED */
531 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
534 struct smb_version_values {
535 char *version_string;
537 __u32 req_capabilities;
538 __u32 large_lock_type;
539 __u32 exclusive_lock_type;
540 __u32 shared_lock_type;
541 __u32 unlock_lock_type;
542 size_t header_preamble_size;
544 size_t max_header_size;
545 size_t read_rsp_size;
547 unsigned int cap_unix;
548 unsigned int cap_nt_find;
549 unsigned int cap_large_files;
550 __u16 signing_enabled;
551 __u16 signing_required;
552 size_t create_lease_size;
555 #define HEADER_SIZE(server) (server->vals->header_size)
556 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
559 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
560 * trying to reuse existing superblock for a new mount
562 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
563 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
564 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
565 CIFS_MOUNT_MAP_SFM_CHR | \
566 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
567 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
568 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
569 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
570 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
571 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
572 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
573 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
574 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
575 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
578 * Generic VFS superblock mount flags (s_flags) to consider when
579 * trying to reuse existing superblock for a new mount
581 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
582 SB_NODEV | SB_SYNCHRONOUS)
584 struct cifs_mnt_data {
585 struct cifs_sb_info *cifs_sb;
586 struct smb3_fs_context *ctx;
590 static inline unsigned int
591 get_rfc1002_length(void *buf)
593 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
597 inc_rfc1001_len(void *buf, int count)
599 be32_add_cpu((__be32 *)buf, count);
602 struct TCP_Server_Info {
603 struct list_head tcp_ses_list;
604 struct list_head smb_ses_list;
605 __u64 conn_id; /* connection identifier (useful for debugging) */
606 int srv_count; /* reference counter */
607 /* 15 character server name + 0x20 16th byte indicating type = srv */
608 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
609 struct smb_version_operations *ops;
610 struct smb_version_values *vals;
611 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
612 enum statusEnum tcpStatus; /* what we think the status is */
613 char *hostname; /* hostname portion of UNC string */
614 struct socket *ssocket;
615 struct sockaddr_storage dstaddr;
616 struct sockaddr_storage srcaddr; /* locally bind to this IP */
620 wait_queue_head_t response_q;
621 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
622 struct list_head pending_mid_q;
623 bool noblocksnd; /* use blocking sendmsg */
624 bool noautotune; /* do not autotune send buf sizes */
627 unsigned int credits; /* send no more requests at once */
628 unsigned int max_credits; /* can override large 32000 default at mnt */
629 unsigned int in_flight; /* number of requests on the wire to server */
630 unsigned int max_in_flight; /* max number of requests that were on wire */
631 spinlock_t req_lock; /* protect the two values above */
632 struct mutex _srv_mutex;
633 unsigned int nofs_flag;
634 struct task_struct *tsk;
635 char server_GUID[16];
637 bool sign; /* is signing enabled on this connection? */
638 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
639 bool session_estab; /* mark when very first sess is established */
640 int echo_credits; /* echo reserved slots */
641 int oplock_credits; /* oplock break reserved slots */
642 bool echoes:1; /* enable echoes */
643 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
644 u16 dialect; /* dialect index that server chose */
645 bool oplocks:1; /* enable oplocks */
646 unsigned int maxReq; /* Clients should submit no more */
647 /* than maxReq distinct unanswered SMBs to the server when using */
648 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
649 unsigned int maxBuf; /* maxBuf specifies the maximum */
650 /* message size the server can send or receive for non-raw SMBs */
651 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
652 /* when socket is setup (and during reconnect) before NegProt sent */
653 unsigned int max_rw; /* maxRw specifies the maximum */
654 /* message size the server can send or receive for */
655 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
656 unsigned int capabilities; /* selective disabling of caps by smb sess */
657 int timeAdj; /* Adjust for difference in server time zone in sec */
658 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
659 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
660 /* 16th byte of RFC1001 workstation name is always null */
661 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
662 __u32 sequence_number; /* for signing, protected by srv_mutex */
663 __u32 reconnect_instance; /* incremented on each reconnect */
664 struct session_key session_key;
665 unsigned long lstrp; /* when we got last response from this server */
666 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
667 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
668 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
669 char negflavor; /* NEGOTIATE response flavor */
670 /* extended security flavors that server supports */
671 bool sec_ntlmssp; /* supports NTLMSSP */
672 bool sec_kerberosu2u; /* supports U2U Kerberos */
673 bool sec_kerberos; /* supports plain Kerberos */
674 bool sec_mskerberos; /* supports legacy MS Kerberos */
675 bool large_buf; /* is current buffer large? */
676 /* use SMBD connection instead of socket */
678 /* point to the SMBD connection if RDMA is used instead of socket */
679 struct smbd_connection *smbd_conn;
680 struct delayed_work echo; /* echo ping workqueue job */
681 struct delayed_work resolve; /* dns resolution workqueue job */
682 char *smallbuf; /* pointer to current "small" buffer */
683 char *bigbuf; /* pointer to current "big" buffer */
684 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
685 unsigned int pdu_size;
686 unsigned int total_read; /* total amount of data read in this pass */
687 atomic_t in_send; /* requests trying to send */
688 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
689 #ifdef CONFIG_CIFS_STATS2
690 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
691 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
692 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
693 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
694 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
696 unsigned int max_read;
697 unsigned int max_write;
698 unsigned int min_offload;
699 __le16 compress_algorithm;
700 __u16 signing_algorithm;
702 /* save initital negprot hash */
703 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
704 bool signing_negotiated; /* true if valid signing context rcvd from server */
705 bool posix_ext_supported;
706 struct delayed_work reconnect; /* reconnect workqueue job */
707 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
708 unsigned long echo_interval;
711 * Number of targets available for reconnect. The more targets
712 * the more tasks have to wait to let the demultiplex thread
716 bool noblockcnt; /* use non-blocking connect() */
719 * If this is a session channel,
720 * primary_server holds the ref-counted
721 * pointer to primary channel connection for the session.
723 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
724 struct TCP_Server_Info *primary_server;
726 #ifdef CONFIG_CIFS_SWN_UPCALL
727 bool use_swn_dstaddr;
728 struct sockaddr_storage swn_dstaddr;
730 #ifdef CONFIG_CIFS_DFS_UPCALL
731 bool is_dfs_conn; /* if a dfs connection */
732 struct mutex refpath_lock; /* protects leaf_fullpath */
734 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
736 * origin_fullpath: first or original referral path
737 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
739 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
740 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
742 * format: \\HOST\SHARE\[OPTIONAL PATH]
744 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
748 static inline void cifs_server_lock(struct TCP_Server_Info *server)
750 unsigned int nofs_flag = memalloc_nofs_save();
752 mutex_lock(&server->_srv_mutex);
753 server->nofs_flag = nofs_flag;
756 static inline void cifs_server_unlock(struct TCP_Server_Info *server)
758 unsigned int nofs_flag = server->nofs_flag;
760 mutex_unlock(&server->_srv_mutex);
761 memalloc_nofs_restore(nofs_flag);
764 struct cifs_credits {
766 unsigned int instance;
769 static inline unsigned int
770 in_flight(struct TCP_Server_Info *server)
773 spin_lock(&server->req_lock);
774 num = server->in_flight;
775 spin_unlock(&server->req_lock);
780 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
783 spin_lock(&server->req_lock);
785 spin_unlock(&server->req_lock);
786 return num >= num_credits;
790 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
793 server->ops->add_credits(server, credits, optype);
797 add_credits_and_wake_if(struct TCP_Server_Info *server,
798 const struct cifs_credits *credits, const int optype)
800 if (credits->value) {
801 server->ops->add_credits(server, credits, optype);
802 wake_up(&server->request_q);
807 set_credits(struct TCP_Server_Info *server, const int val)
809 server->ops->set_credits(server, val);
813 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
814 const unsigned int payload_size)
816 return server->ops->adjust_credits ?
817 server->ops->adjust_credits(server, credits, payload_size) : 0;
821 get_next_mid64(struct TCP_Server_Info *server)
823 return cpu_to_le64(server->ops->get_next_mid(server));
827 get_next_mid(struct TCP_Server_Info *server)
829 __u16 mid = server->ops->get_next_mid(server);
831 * The value in the SMB header should be little endian for easy
832 * on-the-wire decoding.
834 return cpu_to_le16(mid);
838 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
840 if (server->ops->revert_current_mid)
841 server->ops->revert_current_mid(server, val);
845 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
846 const struct smb2_hdr *shdr)
848 unsigned int num = le16_to_cpu(shdr->CreditCharge);
850 return revert_current_mid(server, num > 0 ? num : 1);
854 get_mid(const struct smb_hdr *smb)
856 return le16_to_cpu(smb->Mid);
860 compare_mid(__u16 mid, const struct smb_hdr *smb)
862 return mid == le16_to_cpu(smb->Mid);
866 * When the server supports very large reads and writes via POSIX extensions,
867 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
868 * including the RFC1001 length.
870 * Note that this might make for "interesting" allocation problems during
871 * writeback however as we have to allocate an array of pointers for the
872 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
874 * For reads, there is a similar problem as we need to allocate an array
875 * of kvecs to handle the receive, though that should only need to be done
878 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
879 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
882 * When the server doesn't allow large posix writes, only allow a rsize/wsize
883 * of 2^17-1 minus the size of the call header. That allows for a read or
884 * write up to the maximum size described by RFC1002.
886 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
887 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
889 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
892 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
893 * those values when posix extensions aren't in force. In actuality here, we
894 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
895 * to be ok with the extra byte even though Windows doesn't send writes that
900 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
902 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
903 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
906 * Macros to allow the TCP_Server_Info->net field and related code to drop out
907 * when CONFIG_NET_NS isn't set.
912 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
917 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
924 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
929 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
935 struct cifs_server_iface {
937 unsigned int rdma_capable : 1;
938 unsigned int rss_capable : 1;
939 struct sockaddr_storage sockaddr;
943 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
944 struct TCP_Server_Info *server;
945 __u8 signkey[SMB3_SIGN_KEY_SIZE];
949 * Session structure. One of these for each uid session with a particular host
952 struct list_head smb_ses_list;
953 struct list_head rlist; /* reconnect list */
954 struct list_head tcon_list;
955 struct cifs_tcon *tcon_ipc;
956 struct mutex session_mutex;
957 struct TCP_Server_Info *server; /* pointer to server info */
958 int ses_count; /* reference counter */
959 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
960 unsigned overrideSecFlg; /* if non-zero override global sec flags */
961 char *serverOS; /* name of operating system underlying server */
962 char *serverNOS; /* name of network operating system of server */
963 char *serverDomain; /* security realm of server */
964 __u64 Suid; /* remote smb uid */
965 kuid_t linux_uid; /* overriding owner of files on the mount */
966 kuid_t cred_uid; /* owner of credentials */
967 unsigned int capabilities;
968 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
969 char *user_name; /* must not be null except during init of sess
970 and after mount option parsing we fill it */
973 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
974 struct session_key auth_key;
975 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
976 enum securityEnum sectype; /* what security flavor was specified? */
977 bool sign; /* is signing required? */
980 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
981 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
982 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
983 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
986 * Network interfaces available on the server this session is
989 * Other channels can be opened by connecting and binding this
990 * session to interfaces from this list.
992 * iface_lock should be taken when accessing any of these fields
994 spinlock_t iface_lock;
995 /* ========= begin: protected by iface_lock ======== */
996 struct cifs_server_iface *iface_list;
998 unsigned long iface_last_update; /* jiffies */
999 /* ========= end: protected by iface_lock ======== */
1001 spinlock_t chan_lock;
1002 /* ========= begin: protected by chan_lock ======== */
1003 #define CIFS_MAX_CHANNELS 16
1004 #define CIFS_ALL_CHANNELS_SET(ses) \
1005 ((1UL << (ses)->chan_count) - 1)
1006 #define CIFS_ALL_CHANS_GOOD(ses) \
1007 (!(ses)->chans_need_reconnect)
1008 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
1009 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
1010 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
1011 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
1012 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
1013 test_bit((index), &(ses)->chans_need_reconnect)
1014 #define CIFS_CHAN_IN_RECONNECT(ses, index) \
1015 ((ses)->chans[(index)].in_reconnect)
1017 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1020 atomic_t chan_seq; /* round robin state */
1023 * chans_need_reconnect is a bitmap indicating which of the channels
1024 * under this smb session needs to be reconnected.
1025 * If not multichannel session, only one bit will be used.
1027 * We will ask for sess and tcon reconnection only if all the
1028 * channels are marked for needing reconnection. This will
1029 * enable the sessions on top to continue to live till any
1030 * of the channels below are active.
1032 unsigned long chans_need_reconnect;
1033 /* ========= end: protected by chan_lock ======== */
1037 cap_unix(struct cifs_ses *ses)
1039 return ses->server->vals->cap_unix & ses->capabilities;
1043 * common struct for holding inode info when searching for or updating an
1044 * inode with new info
1047 #define CIFS_FATTR_DFS_REFERRAL 0x1
1048 #define CIFS_FATTR_DELETE_PENDING 0x2
1049 #define CIFS_FATTR_NEED_REVAL 0x4
1050 #define CIFS_FATTR_INO_COLLISION 0x8
1051 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1052 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1065 unsigned int cf_nlink;
1066 unsigned int cf_dtype;
1067 struct timespec64 cf_atime;
1068 struct timespec64 cf_mtime;
1069 struct timespec64 cf_ctime;
1073 struct cached_dirent {
1074 struct list_head entry;
1079 struct cifs_fattr fattr;
1082 struct cached_dirents {
1085 struct dir_context *ctx; /*
1086 * Only used to make sure we only take entries
1087 * from a single context. Never dereferenced.
1089 struct mutex de_mutex;
1090 int pos; /* Expected ctx->pos */
1091 struct list_head entries;
1095 bool is_valid:1; /* Do we have a useable root fid */
1096 bool file_all_info_is_valid:1;
1098 unsigned long time; /* jiffies of when lease was taken */
1099 struct kref refcount;
1100 struct cifs_fid *fid;
1101 struct mutex fid_mutex;
1102 struct cifs_tcon *tcon;
1103 struct dentry *dentry;
1104 struct work_struct lease_break;
1105 struct smb2_file_all_info file_all_info;
1106 struct cached_dirents dirents;
1110 * there is one of these for each connection to a resource on a particular
1114 struct list_head tcon_list;
1116 struct list_head rlist; /* reconnect list */
1117 atomic_t num_local_opens; /* num of all opens including disconnected */
1118 atomic_t num_remote_opens; /* num of all network opens on server */
1119 struct list_head openFileList;
1120 spinlock_t open_file_lock; /* protects list above */
1121 struct cifs_ses *ses; /* pointer to session associated with */
1122 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1123 char *nativeFileSystem;
1124 char *password; /* for share-level security */
1125 __u32 tid; /* The 4 byte tree id */
1126 __u16 Flags; /* optional support bits */
1127 enum tid_status_enum status;
1128 atomic_t num_smbs_sent;
1131 atomic_t num_writes;
1133 atomic_t num_flushes;
1134 atomic_t num_oplock_brks;
1136 atomic_t num_closes;
1137 atomic_t num_deletes;
1138 atomic_t num_mkdirs;
1139 atomic_t num_posixopens;
1140 atomic_t num_posixmkdirs;
1141 atomic_t num_rmdirs;
1142 atomic_t num_renames;
1143 atomic_t num_t2renames;
1144 atomic_t num_ffirst;
1146 atomic_t num_fclose;
1147 atomic_t num_hardlinks;
1148 atomic_t num_symlinks;
1150 atomic_t num_acl_get;
1151 atomic_t num_acl_set;
1154 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1155 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1159 __u64 bytes_written;
1160 spinlock_t stat_lock; /* protects the two fields above */
1161 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1162 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1163 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1164 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1165 bool pipe:1; /* set if connection to pipe share */
1166 bool print:1; /* set if connection to printer share */
1169 bool nohandlecache:1; /* if strange server resource prob can turn off */
1171 bool seal:1; /* transport encryption for this mounted share */
1172 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1173 for this mount even if server would support */
1174 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1175 bool local_lease:1; /* check leases (only) on local system not remote */
1176 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1177 bool broken_sparse_sup; /* if server or share does not support sparse */
1178 bool need_reconnect:1; /* connection reset, tid now invalid */
1179 bool need_reopen_files:1; /* need to reopen tcon file handles */
1180 bool use_resilient:1; /* use resilient instead of durable handles */
1181 bool use_persistent:1; /* use persistent instead of durable handles */
1182 bool no_lease:1; /* Do not request leases on files or directories */
1183 bool use_witness:1; /* use witness protocol */
1184 __le32 capabilities;
1186 __u32 maximal_access;
1187 __u32 vol_serial_number;
1188 __le64 vol_create_time;
1189 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1190 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1191 __u32 ss_flags; /* sector size flags */
1192 __u32 perf_sector_size; /* best sector size for perf */
1194 __u32 max_bytes_chunk;
1195 __u32 max_bytes_copy;
1196 #ifdef CONFIG_CIFS_FSCACHE
1197 u64 resource_id; /* server resource id */
1198 struct fscache_volume *fscache; /* cookie for share */
1200 struct list_head pending_opens; /* list of incomplete opens */
1201 struct cached_fid crfid; /* Cached root fid */
1202 /* BB add field for back pointer to sb struct(s)? */
1203 #ifdef CONFIG_CIFS_DFS_UPCALL
1204 struct list_head ulist; /* cache update list */
1209 * This is a refcounted and timestamped container for a tcon pointer. The
1210 * container holds a tcon reference. It is considered safe to free one of
1211 * these when the tl_count goes to 0. The tl_time is the time of the last
1212 * "get" on the container.
1215 struct rb_node tl_rbnode;
1217 unsigned long tl_flags;
1218 #define TCON_LINK_MASTER 0
1219 #define TCON_LINK_PENDING 1
1220 #define TCON_LINK_IN_TREE 2
1221 unsigned long tl_time;
1223 struct cifs_tcon *tl_tcon;
1226 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1227 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1229 static inline struct cifs_tcon *
1230 tlink_tcon(struct tcon_link *tlink)
1232 return tlink->tl_tcon;
1235 static inline struct tcon_link *
1236 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1238 return cifs_sb->master_tlink;
1241 extern void cifs_put_tlink(struct tcon_link *tlink);
1243 static inline struct tcon_link *
1244 cifs_get_tlink(struct tcon_link *tlink)
1246 if (tlink && !IS_ERR(tlink))
1247 atomic_inc(&tlink->tl_count);
1251 /* This function is always expected to succeed */
1252 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1254 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1256 struct cifs_pending_open {
1257 struct list_head olist;
1258 struct tcon_link *tlink;
1263 struct cifs_deferred_close {
1264 struct list_head dlist;
1265 struct tcon_link *tlink;
1267 __u64 persistent_fid;
1272 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1273 * This is used to track byte stream locks on the file
1275 struct cifsLockInfo {
1276 struct list_head llist; /* pointer to next cifsLockInfo */
1277 struct list_head blist; /* pointer to locks blocked on this */
1278 wait_queue_head_t block_q;
1287 * One of these for each open instance of a file
1289 struct cifs_search_info {
1290 loff_t index_of_last_entry;
1291 __u16 entries_in_buffer;
1294 char *ntwrk_buf_start;
1295 char *srch_entries_start;
1297 const char *presume_name;
1298 unsigned int resume_name_len;
1302 bool smallBuf:1; /* so we know which buf_release function to call */
1305 #define ACL_NO_MODE ((umode_t)(-1))
1306 struct cifs_open_parms {
1307 struct cifs_tcon *tcon;
1308 struct cifs_sb_info *cifs_sb;
1313 struct cifs_fid *fid;
1320 __u64 persistent_fid; /* persist file id for smb2 */
1321 __u64 volatile_fid; /* volatile file id for smb2 */
1322 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1323 __u8 create_guid[16];
1325 struct cifs_pending_open *pending_open;
1327 #ifdef CONFIG_CIFS_DEBUG2
1329 #endif /* CIFS_DEBUG2 */
1333 struct cifs_fid_locks {
1334 struct list_head llist;
1335 struct cifsFileInfo *cfile; /* fid that owns locks */
1336 struct list_head locks; /* locks held by fid above */
1339 struct cifsFileInfo {
1340 /* following two lists are protected by tcon->open_file_lock */
1341 struct list_head tlist; /* pointer to next fid owned by tcon */
1342 struct list_head flist; /* next fid (file instance) for this inode */
1343 /* lock list below protected by cifsi->lock_sem */
1344 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1345 kuid_t uid; /* allows finding which FileInfo structure */
1346 __u32 pid; /* process id who opened file */
1347 struct cifs_fid fid; /* file id from remote */
1348 struct list_head rlist; /* reconnect list */
1349 /* BB add lock scope info here if needed */ ;
1350 /* lock scope id (0 if none) */
1351 struct dentry *dentry;
1352 struct tcon_link *tlink;
1353 unsigned int f_flags;
1354 bool invalidHandle:1; /* file closed via session abend */
1356 bool oplock_break_cancelled:1;
1357 unsigned int oplock_epoch; /* epoch from the lease break */
1358 __u32 oplock_level; /* oplock/lease level from the lease break */
1360 spinlock_t file_info_lock; /* protects four flag/count fields above */
1361 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1362 struct cifs_search_info srch_inf;
1363 struct work_struct oplock_break; /* work for oplock breaks */
1364 struct work_struct put; /* work for the final part of _put */
1365 struct delayed_work deferred;
1366 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1369 struct cifs_io_parms {
1371 __u64 persistent_fid; /* persist file id for smb2 */
1372 __u64 volatile_fid; /* volatile file id for smb2 */
1375 unsigned int length;
1376 struct cifs_tcon *tcon;
1377 struct TCP_Server_Info *server;
1380 struct cifs_aio_ctx {
1381 struct kref refcount;
1382 struct list_head list;
1383 struct mutex aio_mutex;
1384 struct completion done;
1385 struct iov_iter iter;
1387 struct cifsFileInfo *cfile;
1390 unsigned int npages;
1393 unsigned int total_len;
1396 * Indicates if this aio_ctx is for direct_io,
1397 * If yes, iter is a copy of the user passed iov_iter
1402 /* asynchronous read support */
1403 struct cifs_readdata {
1404 struct kref refcount;
1405 struct list_head list;
1406 struct completion done;
1407 struct cifsFileInfo *cfile;
1408 struct address_space *mapping;
1409 struct cifs_aio_ctx *ctx;
1412 unsigned int got_bytes;
1415 struct work_struct work;
1416 int (*read_into_pages)(struct TCP_Server_Info *server,
1417 struct cifs_readdata *rdata,
1419 int (*copy_into_pages)(struct TCP_Server_Info *server,
1420 struct cifs_readdata *rdata,
1421 struct iov_iter *iter);
1423 struct TCP_Server_Info *server;
1424 #ifdef CONFIG_CIFS_SMB_DIRECT
1427 unsigned int pagesz;
1428 unsigned int page_offset;
1429 unsigned int tailsz;
1430 struct cifs_credits credits;
1431 unsigned int nr_pages;
1432 struct page **pages;
1435 /* asynchronous write support */
1436 struct cifs_writedata {
1437 struct kref refcount;
1438 struct list_head list;
1439 struct completion done;
1440 enum writeback_sync_modes sync_mode;
1441 struct work_struct work;
1442 struct cifsFileInfo *cfile;
1443 struct cifs_aio_ctx *ctx;
1448 struct TCP_Server_Info *server;
1449 #ifdef CONFIG_CIFS_SMB_DIRECT
1452 unsigned int pagesz;
1453 unsigned int page_offset;
1454 unsigned int tailsz;
1455 struct cifs_credits credits;
1456 unsigned int nr_pages;
1457 struct page **pages;
1461 * Take a reference on the file private data. Must be called with
1462 * cfile->file_info_lock held.
1465 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1470 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1471 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1473 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1475 #define CIFS_CACHE_READ_FLG 1
1476 #define CIFS_CACHE_HANDLE_FLG 2
1477 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1478 #define CIFS_CACHE_WRITE_FLG 4
1479 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1480 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1482 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
1483 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1484 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
1487 * One of these for each file inode
1490 struct cifsInodeInfo {
1492 /* These must be contiguous */
1493 struct inode vfs_inode; /* the VFS's inode record */
1494 struct netfs_i_context netfs_ctx; /* Netfslib context */
1496 bool can_cache_brlcks;
1497 struct list_head llist; /* locks helb by this inode */
1499 * NOTE: Some code paths call down_read(lock_sem) twice, so
1500 * we must always use cifs_down_write() instead of down_write()
1501 * for this semaphore to avoid deadlocks.
1503 struct rw_semaphore lock_sem; /* protect the fields above */
1504 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1505 struct list_head openFileList;
1506 spinlock_t open_file_lock; /* protects openFileList */
1507 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1508 unsigned int oplock; /* oplock/lease level we have */
1509 unsigned int epoch; /* used to track lease state changes */
1510 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1511 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1512 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1513 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1514 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1515 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1516 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1517 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1518 unsigned long flags;
1519 spinlock_t writers_lock;
1520 unsigned int writers; /* Number of writers on this inode */
1521 unsigned long time; /* jiffies of last update of inode */
1522 u64 server_eof; /* current file size on server -- protected by i_lock */
1523 u64 uniqueid; /* server inode number */
1524 u64 createtime; /* creation time on server */
1525 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1526 struct list_head deferred_closes; /* list of deferred closes */
1527 spinlock_t deferred_lock; /* protection on deferred list */
1528 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1531 static inline struct cifsInodeInfo *
1532 CIFS_I(struct inode *inode)
1534 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1537 static inline struct cifs_sb_info *
1538 CIFS_SB(struct super_block *sb)
1540 return sb->s_fs_info;
1543 static inline struct cifs_sb_info *
1544 CIFS_FILE_SB(struct file *file)
1546 return CIFS_SB(file_inode(file)->i_sb);
1549 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1551 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1558 convert_delimiter(char *path, char delim)
1560 char old_delim, *pos;
1568 while ((pos = strchr(pos, old_delim)))
1572 #define cifs_stats_inc atomic_inc
1574 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1578 spin_lock(&tcon->stat_lock);
1579 tcon->bytes_written += bytes;
1580 spin_unlock(&tcon->stat_lock);
1584 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1587 spin_lock(&tcon->stat_lock);
1588 tcon->bytes_read += bytes;
1589 spin_unlock(&tcon->stat_lock);
1594 * This is the prototype for the mid receive function. This function is for
1595 * receiving the rest of the SMB frame, starting with the WordCount (which is
1596 * just after the MID in struct smb_hdr). Note:
1598 * - This will be called by cifsd, with no locks held.
1599 * - The mid will still be on the pending_mid_q.
1600 * - mid->resp_buf will point to the current buffer.
1602 * Returns zero on a successful receive, or an error. The receive state in
1603 * the TCP_Server_Info will also be updated.
1605 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1606 struct mid_q_entry *mid);
1609 * This is the prototype for the mid callback function. This is called once the
1610 * mid has been received off of the socket. When creating one, take special
1611 * care to avoid deadlocks. Things to bear in mind:
1613 * - it will be called by cifsd, with no locks held
1614 * - the mid will be removed from any lists
1616 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1619 * This is the protopyte for mid handle function. This is called once the mid
1620 * has been recognized after decryption of the message.
1622 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1623 struct mid_q_entry *mid);
1625 /* one of these for every pending CIFS request to the server */
1626 struct mid_q_entry {
1627 struct list_head qhead; /* mids waiting on reply from this server */
1628 struct kref refcount;
1629 struct TCP_Server_Info *server; /* server corresponding to this mid */
1630 __u64 mid; /* multiplex id */
1631 __u16 credits; /* number of credits consumed by this mid */
1632 __u16 credits_received; /* number of credits from the response */
1633 __u32 pid; /* process id */
1634 __u32 sequence_number; /* for CIFS signing */
1635 unsigned long when_alloc; /* when mid was created */
1636 #ifdef CONFIG_CIFS_STATS2
1637 unsigned long when_sent; /* time when smb send finished */
1638 unsigned long when_received; /* when demux complete (taken off wire) */
1640 mid_receive_t *receive; /* call receive callback */
1641 mid_callback_t *callback; /* call completion callback */
1642 mid_handle_t *handle; /* call handle mid callback */
1643 void *callback_data; /* general purpose pointer for callback */
1644 struct task_struct *creator;
1645 void *resp_buf; /* pointer to received SMB header */
1646 unsigned int resp_buf_size;
1647 int mid_state; /* wish this were enum but can not pass to wait_event */
1648 unsigned int mid_flags;
1649 __le16 command; /* smb command code */
1650 unsigned int optype; /* operation type */
1651 bool large_buf:1; /* if valid response, is pointer to large buf */
1652 bool multiRsp:1; /* multiple trans2 responses for one request */
1653 bool multiEnd:1; /* both received */
1654 bool decrypted:1; /* decrypted entry */
1657 struct close_cancelled_open {
1658 struct cifs_fid fid;
1659 struct cifs_tcon *tcon;
1660 struct work_struct work;
1665 /* Make code in transport.c a little cleaner by moving
1666 update of optional stats into function below */
1667 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1669 atomic_inc(&server->in_send);
1672 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1674 atomic_dec(&server->in_send);
1677 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1679 atomic_inc(&server->num_waiters);
1682 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1684 atomic_dec(&server->num_waiters);
1687 #ifdef CONFIG_CIFS_STATS2
1688 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1690 mid->when_sent = jiffies;
1693 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1698 /* for pending dnotify requests */
1699 struct dir_notify_req {
1700 struct list_head lhead;
1707 __u32 filter; /* CompletionFilter (for multishot) */
1712 struct dfs_info3_param {
1713 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1723 struct list_head list;
1724 struct cifsFileInfo *cfile;
1727 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1730 kfree(param->path_name);
1731 kfree(param->node_name);
1735 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1736 int number_of_items)
1739 if ((number_of_items == 0) || (param == NULL))
1741 for (i = 0; i < number_of_items; i++) {
1742 kfree(param[i].path_name);
1743 kfree(param[i].node_name);
1748 static inline bool is_interrupt_error(int error)
1753 case -ERESTARTNOHAND:
1754 case -ERESTARTNOINTR:
1760 static inline bool is_retryable_error(int error)
1762 if (is_interrupt_error(error) || error == -EAGAIN)
1768 /* cifs_get_writable_file() flags */
1769 #define FIND_WR_ANY 0
1770 #define FIND_WR_FSUID_ONLY 1
1771 #define FIND_WR_WITH_DELETE 2
1774 #define MID_REQUEST_ALLOCATED 1
1775 #define MID_REQUEST_SUBMITTED 2
1776 #define MID_RESPONSE_RECEIVED 4
1777 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1778 #define MID_RESPONSE_MALFORMED 0x10
1779 #define MID_SHUTDOWN 0x20
1782 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1783 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1785 /* Types of response buffer returned from SendReceive2 */
1786 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1787 #define CIFS_SMALL_BUFFER 1
1788 #define CIFS_LARGE_BUFFER 2
1789 #define CIFS_IOVEC 4 /* array of response buffers */
1791 /* Type of Request to SendReceive2 */
1792 #define CIFS_BLOCKING_OP 1 /* operation can block */
1793 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1794 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1795 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1796 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1797 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1799 /* Type of request operation */
1800 #define CIFS_ECHO_OP 0x080 /* echo request */
1801 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1802 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1803 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1804 /* Lower bitmask values are reserved by others below. */
1805 #define CIFS_SESS_OP 0x2000 /* session setup request */
1806 #define CIFS_OP_MASK 0x2780 /* mask request type */
1808 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1809 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1810 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1812 /* Security Flags: indicate type of session setup needed */
1813 #define CIFSSEC_MAY_SIGN 0x00001
1814 #define CIFSSEC_MAY_NTLMV2 0x00004
1815 #define CIFSSEC_MAY_KRB5 0x00008
1816 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1817 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1819 #define CIFSSEC_MUST_SIGN 0x01001
1820 /* note that only one of the following can be set so the
1821 result of setting MUST flags more than once will be to
1822 require use of the stronger protocol */
1823 #define CIFSSEC_MUST_NTLMV2 0x04004
1824 #define CIFSSEC_MUST_KRB5 0x08008
1825 #ifdef CONFIG_CIFS_UPCALL
1826 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1828 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1830 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1831 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1833 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1834 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1835 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1837 *****************************************************************
1838 * All constants go here
1839 *****************************************************************
1842 #define UID_HASH (16)
1845 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1846 * following to be declared.
1849 /****************************************************************************
1850 * Locking notes. All updates to global variables and lists should be
1851 * protected by spinlocks or semaphores.
1855 * GlobalMid_Lock protects:
1856 * list operations on pending_mid_q and oplockQ
1857 * updates to XID counters, multiplex id and SMB sequence numbers
1858 * list operations on global DnotifyReqList
1859 * updates to ses->status and TCP_Server_Info->tcpStatus
1860 * updates to server->CurrentMid
1861 * tcp_ses_lock protects:
1862 * list operations on tcp and SMB session lists
1863 * tcon->open_file_lock protects the list of open files hanging off the tcon
1864 * inode->open_file_lock protects the openFileList hanging off the inode
1865 * cfile->file_info_lock protects counters and fields in cifs file struct
1866 * f_owner.lock protects certain per file struct operations
1867 * mapping->page_lock protects certain per page operations
1869 * Note that the cifs_tcon.open_file_lock should be taken before
1870 * not after the cifsInodeInfo.open_file_lock
1874 * cifsInodeInfo->lock_sem protects:
1875 * the list of locks held by the inode
1877 ****************************************************************************/
1879 #ifdef DECLARE_GLOBALS_HERE
1880 #define GLOBAL_EXTERN
1882 #define GLOBAL_EXTERN extern
1886 * the list of TCP_Server_Info structures, ie each of the sockets
1887 * connecting our client to a distinct server (ip address), is
1888 * chained together by cifs_tcp_ses_list. The list of all our SMB
1889 * sessions (and from that the tree connections) can be found
1890 * by iterating over cifs_tcp_ses_list
1892 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1895 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1896 * tcp session, and the list of tcon's per smb session. It also protects
1897 * the reference counters for the server, smb session, and tcon. It also
1898 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1899 * changes to the tcon->tidStatus should be done while holding this lock.
1900 * generally the locks should be taken in order tcp_ses_lock before
1901 * tcon->open_file_lock and that before file->file_info_lock since the
1902 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1904 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1907 * Global transaction id (XID) information
1909 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1910 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1911 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1912 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1913 /* on midQ entries */
1915 * Global counters, updated atomically
1917 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1918 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1919 GLOBAL_EXTERN atomic_t tcpSesNextId;
1920 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1921 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1922 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1924 /* Various Debug counters */
1925 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1926 #ifdef CONFIG_CIFS_STATS2
1927 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1928 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1929 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1931 GLOBAL_EXTERN atomic_t smBufAllocCount;
1932 GLOBAL_EXTERN atomic_t midCount;
1935 extern bool enable_oplocks; /* enable or disable oplocks */
1936 extern bool lookupCacheEnabled;
1937 extern unsigned int global_secflags; /* if on, session setup sent
1938 with more secure ntlmssp2 challenge/resp */
1939 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1940 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1941 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1942 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1943 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1944 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1945 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1946 extern unsigned int cifs_min_small; /* min size of small buf pool */
1947 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1948 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1950 void cifs_oplock_break(struct work_struct *work);
1951 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1952 void smb2_deferred_work_close(struct work_struct *work);
1954 extern const struct slow_work_ops cifs_oplock_break_ops;
1955 extern struct workqueue_struct *cifsiod_wq;
1956 extern struct workqueue_struct *decrypt_wq;
1957 extern struct workqueue_struct *fileinfo_put_wq;
1958 extern struct workqueue_struct *cifsoplockd_wq;
1959 extern struct workqueue_struct *deferredclose_wq;
1960 extern __u32 cifs_lock_secret;
1962 extern mempool_t *cifs_mid_poolp;
1964 /* Operations for different SMB versions */
1965 #define SMB1_VERSION_STRING "1.0"
1966 #define SMB20_VERSION_STRING "2.0"
1967 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1968 extern struct smb_version_operations smb1_operations;
1969 extern struct smb_version_values smb1_values;
1970 extern struct smb_version_operations smb20_operations;
1971 extern struct smb_version_values smb20_values;
1972 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
1973 #define SMB21_VERSION_STRING "2.1"
1974 extern struct smb_version_operations smb21_operations;
1975 extern struct smb_version_values smb21_values;
1976 #define SMBDEFAULT_VERSION_STRING "default"
1977 extern struct smb_version_values smbdefault_values;
1978 #define SMB3ANY_VERSION_STRING "3"
1979 extern struct smb_version_values smb3any_values;
1980 #define SMB30_VERSION_STRING "3.0"
1981 extern struct smb_version_operations smb30_operations;
1982 extern struct smb_version_values smb30_values;
1983 #define SMB302_VERSION_STRING "3.02"
1984 #define ALT_SMB302_VERSION_STRING "3.0.2"
1985 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1986 extern struct smb_version_values smb302_values;
1987 #define SMB311_VERSION_STRING "3.1.1"
1988 #define ALT_SMB311_VERSION_STRING "3.11"
1989 extern struct smb_version_operations smb311_operations;
1990 extern struct smb_version_values smb311_values;
1992 static inline char *get_security_type_str(enum securityEnum sectype)
1996 return "RawNTLMSSP";
2006 static inline bool is_smb1_server(struct TCP_Server_Info *server)
2008 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
2011 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
2014 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
2015 * Subsystem Notifies That a Share Is a DFS Share.
2017 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
2018 * Application Updates a Share.
2020 if (!tcon || !tcon->ses || !tcon->ses->server)
2022 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
2023 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
2026 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
2027 const struct dfs_info3_param *ref)
2030 * Check if all targets are capable of handling DFS referrals as per
2031 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
2033 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
2036 static inline u64 cifs_flock_len(struct file_lock *fl)
2038 return fl->fl_end == OFFSET_MAX ? 0 : fl->fl_end - fl->fl_start + 1;
2041 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
2043 if (WARN_ON_ONCE(!ses || !ses->server))
2046 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
2047 * servers do require it during NTLMSSP.
2049 if (ses->server->dialect <= SMB20_PROT_ID)
2050 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
2051 return sizeof(ses->workstation_name);
2054 #endif /* _CIFS_GLOB_H */