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/netfs.h>
20 #include "cifs_fs_sb.h"
22 #include <crypto/internal/hash.h>
23 #include <linux/scatterlist.h>
24 #include <uapi/linux/cifs/cifs_mount.h>
25 #include "../smbfs_common/smb2pdu.h"
28 #define SMB_PATH_MAX 260
30 #define RFC1001_PORT 139
33 * The sizes of various internal tables and strings
35 #define MAX_UID_INFO 16
36 #define MAX_SES_INFO 2
37 #define MAX_TCON_INFO 4
39 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
41 #define CIFS_MIN_RCV_POOL 4
43 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
45 * default attribute cache timeout (jiffies)
47 #define CIFS_DEF_ACTIMEO (1 * HZ)
50 * max attribute cache timeout (jiffies) - 2^30
52 #define CIFS_MAX_ACTIMEO (1 << 30)
55 * Max persistent and resilient handle timeout (milliseconds).
56 * Windows durable max was 960000 (16 minutes)
58 #define SMB3_MAX_HANDLE_TIMEOUT 960000
61 * MAX_REQ is the maximum number of requests that WE will send
62 * on one socket concurrently.
64 #define CIFS_MAX_REQ 32767
66 #define RFC1001_NAME_LEN 15
67 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69 /* maximum length of ip addr as a string (including ipv6 and sctp) */
70 #define SERVER_NAME_LENGTH 80
71 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73 /* echo interval in seconds */
74 #define SMB_ECHO_INTERVAL_MIN 1
75 #define SMB_ECHO_INTERVAL_MAX 600
76 #define SMB_ECHO_INTERVAL_DEFAULT 60
78 /* dns resolution intervals in seconds */
79 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
80 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
82 /* maximum number of PDUs in one compound */
83 #define MAX_COMPOUND 5
86 * Default number of credits to keep available for SMB3.
87 * This value is chosen somewhat arbitrarily. The Windows client
88 * defaults to 128 credits, the Windows server allows clients up to
89 * 512 credits (or 8K for later versions), and the NetApp server
90 * does not limit clients at all. Choose a high enough default value
91 * such that the client shouldn't limit performance, but allow mount
92 * to override (until you approach 64K, where we limit credits to 65000
93 * to reduce possibility of seeing more server credit overflow bugs.
95 #define SMB2_MAX_CREDITS_AVAILABLE 32000
99 #ifndef XATTR_DOS_ATTRIB
100 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
103 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
106 * CIFS vfs client Status information (based on what we know.)
109 /* associated with each connection */
119 /* associated with each smb session */
120 enum ses_status_enum {
128 /* associated with each tree connection to the server */
129 enum tid_status_enum {
136 TID_NEED_FILES_INVALIDATE, /* currently unused */
137 TID_IN_FILES_INVALIDATE
141 Unspecified = 0, /* not specified */
142 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
143 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
144 Kerberos, /* Kerberos via SPNEGO */
152 /* crypto security descriptor definition */
154 struct shash_desc shash;
158 /* crypto hashing related structure/fields, not specific to a sec mech */
159 struct cifs_secmech {
160 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
161 struct crypto_shash *md5; /* md5 hash function */
162 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
163 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
164 struct crypto_shash *sha512; /* sha512 hash function */
165 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
166 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
167 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
168 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
169 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
170 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
171 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
174 /* per smb session structure/fields */
175 struct ntlmssp_auth {
176 bool sesskey_per_smbsess; /* whether session key is per smb session */
177 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
178 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
179 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
180 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
188 struct cifs_sid osid;
189 struct cifs_sid gsid;
190 struct cifs_ntace *ntaces;
191 struct cifs_ace *aces;
195 *****************************************************************
196 * Except the CIFS PDUs themselves all the
197 * globally interesting structs should go here
198 *****************************************************************
202 * A smb_rqst represents a complete request to be issued to a server. It's
203 * formed by a kvec array, followed by an array of pages. Page data is assumed
204 * to start at the beginning of the first page.
207 struct kvec *rq_iov; /* array of kvecs */
208 unsigned int rq_nvec; /* number of kvecs in array */
209 struct page **rq_pages; /* pointer to array of page ptrs */
210 unsigned int rq_offset; /* the offset to the 1st page */
211 unsigned int rq_npages; /* number pages in array */
212 unsigned int rq_pagesz; /* page size to use */
213 unsigned int rq_tailsz; /* length of last page */
217 struct TCP_Server_Info;
221 struct dfs_info3_param;
223 struct smb3_fs_context;
225 struct cifs_readdata;
226 struct cifs_writedata;
227 struct cifs_io_parms;
228 struct cifs_search_info;
229 struct cifsInodeInfo;
230 struct cifs_open_parms;
233 struct smb_version_operations {
234 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
235 struct mid_q_entry *);
236 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
237 /* setup request: allocate mid, sign message */
238 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
239 struct TCP_Server_Info *,
241 /* setup async request: allocate mid, sign message */
242 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
244 /* check response: verify signature, map error */
245 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
247 void (*add_credits)(struct TCP_Server_Info *server,
248 const struct cifs_credits *credits,
250 void (*set_credits)(struct TCP_Server_Info *, const int);
251 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
252 unsigned int (*get_credits)(struct mid_q_entry *);
253 __u64 (*get_next_mid)(struct TCP_Server_Info *);
254 void (*revert_current_mid)(struct TCP_Server_Info *server,
255 const unsigned int val);
256 /* data offset from read response message */
257 unsigned int (*read_data_offset)(char *);
259 * Data length from read response message
260 * When in_remaining is true, the returned data length is in
261 * message field DataRemaining for out-of-band data read (e.g through
262 * Memory Registration RDMA write in SMBD).
263 * Otherwise, the returned data length is in message field DataLength.
265 unsigned int (*read_data_length)(char *, bool in_remaining);
266 /* map smb to linux error */
267 int (*map_error)(char *, bool);
268 /* find mid corresponding to the response message */
269 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
270 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
271 void (*clear_stats)(struct cifs_tcon *);
272 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
273 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
274 /* verify the message */
275 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
276 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
277 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
278 void (*downgrade_oplock)(struct TCP_Server_Info *server,
279 struct cifsInodeInfo *cinode, __u32 oplock,
280 unsigned int epoch, bool *purge_cache);
281 /* process transaction2 response */
282 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
284 /* check if we need to negotiate */
285 bool (*need_neg)(struct TCP_Server_Info *);
286 /* negotiate to the server */
287 int (*negotiate)(const unsigned int xid,
288 struct cifs_ses *ses,
289 struct TCP_Server_Info *server);
290 /* set negotiated write size */
291 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
292 /* set negotiated read size */
293 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
294 /* setup smb sessionn */
295 int (*sess_setup)(const unsigned int, struct cifs_ses *,
296 struct TCP_Server_Info *server,
297 const struct nls_table *);
298 /* close smb session */
299 int (*logoff)(const unsigned int, struct cifs_ses *);
300 /* connect to a server share */
301 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
302 struct cifs_tcon *, const struct nls_table *);
303 /* close tree connecion */
304 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
305 /* get DFS referrals */
306 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
307 const char *, struct dfs_info3_param **,
308 unsigned int *, const struct nls_table *, int);
309 /* informational QFS call */
310 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
311 struct cifs_sb_info *);
312 /* check if a path is accessible or not */
313 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
314 struct cifs_sb_info *, const char *);
315 /* query path data from the server */
316 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
317 struct cifs_sb_info *, const char *,
318 FILE_ALL_INFO *, bool *, bool *);
319 /* query file data from the server */
320 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
321 struct cifs_fid *, FILE_ALL_INFO *);
322 /* query reparse tag from srv to determine which type of special file */
323 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
324 struct cifs_sb_info *cifs_sb, const char *path,
326 /* get server index number */
327 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
328 struct cifs_sb_info *, const char *,
329 u64 *uniqueid, FILE_ALL_INFO *);
330 /* set size by path */
331 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
332 const char *, __u64, struct cifs_sb_info *, bool);
333 /* set size by file handle */
334 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
335 struct cifsFileInfo *, __u64, bool);
337 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
339 int (*set_compression)(const unsigned int, struct cifs_tcon *,
340 struct cifsFileInfo *);
341 /* check if we can send an echo or nor */
342 bool (*can_echo)(struct TCP_Server_Info *);
343 /* send echo request */
344 int (*echo)(struct TCP_Server_Info *);
345 /* create directory */
346 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
347 umode_t mode, struct cifs_tcon *tcon,
348 const char *full_path,
349 struct cifs_sb_info *cifs_sb);
350 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
351 struct cifs_tcon *tcon, const char *name,
352 struct cifs_sb_info *sb);
353 /* set info on created directory */
354 void (*mkdir_setinfo)(struct inode *, const char *,
355 struct cifs_sb_info *, struct cifs_tcon *,
357 /* remove directory */
358 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
359 struct cifs_sb_info *);
361 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
362 struct cifs_sb_info *);
363 /* open, rename and delete file */
364 int (*rename_pending_delete)(const char *, struct dentry *,
366 /* send rename request */
367 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
368 const char *, struct cifs_sb_info *);
369 /* send create hardlink request */
370 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
371 const char *, const char *,
372 struct cifs_sb_info *);
373 /* query symlink target */
374 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
375 struct cifs_sb_info *, const char *,
377 /* open a file for non-posix mounts */
378 int (*open)(const unsigned int, struct cifs_open_parms *,
379 __u32 *, FILE_ALL_INFO *);
380 /* set fid protocol-specific info */
381 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
383 void (*close)(const unsigned int, struct cifs_tcon *,
385 /* close a file, returning file attributes and timestamps */
386 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
387 struct cifsFileInfo *pfile_info);
388 /* send a flush request to the server */
389 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
390 /* async read from the server */
391 int (*async_readv)(struct cifs_readdata *);
392 /* async write to the server */
393 int (*async_writev)(struct cifs_writedata *,
394 void (*release)(struct kref *));
395 /* sync read from the server */
396 int (*sync_read)(const unsigned int, struct cifs_fid *,
397 struct cifs_io_parms *, unsigned int *, char **,
399 /* sync write to the server */
400 int (*sync_write)(const unsigned int, struct cifs_fid *,
401 struct cifs_io_parms *, unsigned int *, struct kvec *,
403 /* open dir, start readdir */
404 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
405 const char *, struct cifs_sb_info *,
406 struct cifs_fid *, __u16,
407 struct cifs_search_info *);
408 /* continue readdir */
409 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
411 __u16, struct cifs_search_info *srch_inf);
413 int (*close_dir)(const unsigned int, struct cifs_tcon *,
415 /* calculate a size of SMB message */
416 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
417 /* check for STATUS_PENDING and process the response if yes */
418 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
419 /* check for STATUS_NETWORK_SESSION_EXPIRED */
420 bool (*is_session_expired)(char *);
421 /* send oplock break response */
422 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
423 struct cifsInodeInfo *);
424 /* query remote filesystem */
425 int (*queryfs)(const unsigned int, struct cifs_tcon *,
426 struct cifs_sb_info *, struct kstatfs *);
427 /* send mandatory brlock to the server */
428 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
429 __u64, __u32, int, int, bool);
430 /* unlock range of mandatory locks */
431 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
433 /* push brlocks from the cache to the server */
434 int (*push_mand_locks)(struct cifsFileInfo *);
435 /* get lease key of the inode */
436 void (*get_lease_key)(struct inode *, struct cifs_fid *);
437 /* set lease key of the inode */
438 void (*set_lease_key)(struct inode *, struct cifs_fid *);
439 /* generate new lease key */
440 void (*new_lease_key)(struct cifs_fid *);
441 int (*generate_signingkey)(struct cifs_ses *ses,
442 struct TCP_Server_Info *server);
443 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
444 bool allocate_crypto);
445 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
446 struct cifsFileInfo *src_file);
447 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
448 struct cifsFileInfo *src_file, void __user *);
449 int (*notify)(const unsigned int xid, struct file *pfile,
451 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
452 struct cifs_sb_info *, const unsigned char *,
453 char *, unsigned int *);
454 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
455 struct cifs_sb_info *, const unsigned char *,
456 char *, unsigned int *);
457 /* if we can do cache read operations */
458 bool (*is_read_op)(__u32);
459 /* set oplock level for the inode */
460 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
462 /* create lease context buffer for CREATE request */
463 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
464 /* parse lease context buffer and return oplock/epoch info */
465 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
466 ssize_t (*copychunk_range)(const unsigned int,
467 struct cifsFileInfo *src_file,
468 struct cifsFileInfo *target_file,
469 u64 src_off, u64 len, u64 dest_off);
470 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
471 struct cifsFileInfo *target_file, u64 src_off, u64 len,
473 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
474 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
475 const unsigned char *, const unsigned char *, char *,
476 size_t, struct cifs_sb_info *);
477 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
478 const char *, const void *, const __u16,
479 const struct nls_table *, struct cifs_sb_info *);
480 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
481 const char *, u32 *, u32);
482 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
483 const struct cifs_fid *, u32 *, u32);
484 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
486 /* writepages retry size */
487 unsigned int (*wp_retry_size)(struct inode *);
488 /* get mtu credits */
489 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
490 unsigned int *, struct cifs_credits *);
491 /* adjust previously taken mtu credits to request size */
492 int (*adjust_credits)(struct TCP_Server_Info *server,
493 struct cifs_credits *credits,
494 const unsigned int payload_size);
495 /* check if we need to issue closedir */
496 bool (*dir_needs_close)(struct cifsFileInfo *);
497 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
499 /* init transform request - used for encryption for now */
500 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
501 struct smb_rqst *, struct smb_rqst *);
502 int (*is_transform_hdr)(void *buf);
503 int (*receive_transform)(struct TCP_Server_Info *,
504 struct mid_q_entry **, char **, int *);
505 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
507 int (*next_header)(char *);
508 /* ioctl passthrough for query_info */
509 int (*ioctl_query_info)(const unsigned int xid,
510 struct cifs_tcon *tcon,
511 struct cifs_sb_info *cifs_sb,
512 __le16 *path, int is_dir,
514 /* make unix special files (block, char, fifo, socket) */
515 int (*make_node)(unsigned int xid,
517 struct dentry *dentry,
518 struct cifs_tcon *tcon,
519 const char *full_path,
521 dev_t device_number);
522 /* version specific fiemap implementation */
523 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
524 struct fiemap_extent_info *, u64, u64);
525 /* version specific llseek implementation */
526 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
527 /* Check for STATUS_IO_TIMEOUT */
528 bool (*is_status_io_timeout)(char *buf);
529 /* Check for STATUS_NETWORK_NAME_DELETED */
530 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
533 struct smb_version_values {
534 char *version_string;
536 __u32 req_capabilities;
537 __u32 large_lock_type;
538 __u32 exclusive_lock_type;
539 __u32 shared_lock_type;
540 __u32 unlock_lock_type;
541 size_t header_preamble_size;
543 size_t max_header_size;
544 size_t read_rsp_size;
546 unsigned int cap_unix;
547 unsigned int cap_nt_find;
548 unsigned int cap_large_files;
549 __u16 signing_enabled;
550 __u16 signing_required;
551 size_t create_lease_size;
554 #define HEADER_SIZE(server) (server->vals->header_size)
555 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
558 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
559 * trying to reuse existing superblock for a new mount
561 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
562 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
563 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
564 CIFS_MOUNT_MAP_SFM_CHR | \
565 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
566 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
567 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
568 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
569 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
570 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
571 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
572 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
573 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
574 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
577 * Generic VFS superblock mount flags (s_flags) to consider when
578 * trying to reuse existing superblock for a new mount
580 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
581 SB_NODEV | SB_SYNCHRONOUS)
583 struct cifs_mnt_data {
584 struct cifs_sb_info *cifs_sb;
585 struct smb3_fs_context *ctx;
589 static inline unsigned int
590 get_rfc1002_length(void *buf)
592 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
596 inc_rfc1001_len(void *buf, int count)
598 be32_add_cpu((__be32 *)buf, count);
601 struct TCP_Server_Info {
602 struct list_head tcp_ses_list;
603 struct list_head smb_ses_list;
604 __u64 conn_id; /* connection identifier (useful for debugging) */
605 int srv_count; /* reference counter */
606 /* 15 character server name + 0x20 16th byte indicating type = srv */
607 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
608 struct smb_version_operations *ops;
609 struct smb_version_values *vals;
610 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
611 enum statusEnum tcpStatus; /* what we think the status is */
612 char *hostname; /* hostname portion of UNC string */
613 struct socket *ssocket;
614 struct sockaddr_storage dstaddr;
615 struct sockaddr_storage srcaddr; /* locally bind to this IP */
619 wait_queue_head_t response_q;
620 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
621 struct list_head pending_mid_q;
622 bool noblocksnd; /* use blocking sendmsg */
623 bool noautotune; /* do not autotune send buf sizes */
626 unsigned int credits; /* send no more requests at once */
627 unsigned int max_credits; /* can override large 32000 default at mnt */
628 unsigned int in_flight; /* number of requests on the wire to server */
629 unsigned int max_in_flight; /* max number of requests that were on wire */
630 spinlock_t req_lock; /* protect the two values above */
631 struct mutex srv_mutex;
632 struct task_struct *tsk;
633 char server_GUID[16];
635 bool sign; /* is signing enabled on this connection? */
636 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
637 bool session_estab; /* mark when very first sess is established */
638 int echo_credits; /* echo reserved slots */
639 int oplock_credits; /* oplock break reserved slots */
640 bool echoes:1; /* enable echoes */
641 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
642 u16 dialect; /* dialect index that server chose */
643 bool oplocks:1; /* enable oplocks */
644 unsigned int maxReq; /* Clients should submit no more */
645 /* than maxReq distinct unanswered SMBs to the server when using */
646 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
647 unsigned int maxBuf; /* maxBuf specifies the maximum */
648 /* message size the server can send or receive for non-raw SMBs */
649 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
650 /* when socket is setup (and during reconnect) before NegProt sent */
651 unsigned int max_rw; /* maxRw specifies the maximum */
652 /* message size the server can send or receive for */
653 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
654 unsigned int capabilities; /* selective disabling of caps by smb sess */
655 int timeAdj; /* Adjust for difference in server time zone in sec */
656 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
657 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
658 /* 16th byte of RFC1001 workstation name is always null */
659 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
660 __u32 sequence_number; /* for signing, protected by srv_mutex */
661 __u32 reconnect_instance; /* incremented on each reconnect */
662 struct session_key session_key;
663 unsigned long lstrp; /* when we got last response from this server */
664 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
665 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
666 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
667 char negflavor; /* NEGOTIATE response flavor */
668 /* extended security flavors that server supports */
669 bool sec_ntlmssp; /* supports NTLMSSP */
670 bool sec_kerberosu2u; /* supports U2U Kerberos */
671 bool sec_kerberos; /* supports plain Kerberos */
672 bool sec_mskerberos; /* supports legacy MS Kerberos */
673 bool large_buf; /* is current buffer large? */
674 /* use SMBD connection instead of socket */
676 /* point to the SMBD connection if RDMA is used instead of socket */
677 struct smbd_connection *smbd_conn;
678 struct delayed_work echo; /* echo ping workqueue job */
679 struct delayed_work resolve; /* dns resolution workqueue job */
680 char *smallbuf; /* pointer to current "small" buffer */
681 char *bigbuf; /* pointer to current "big" buffer */
682 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
683 unsigned int pdu_size;
684 unsigned int total_read; /* total amount of data read in this pass */
685 atomic_t in_send; /* requests trying to send */
686 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
687 #ifdef CONFIG_CIFS_STATS2
688 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
689 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
690 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
691 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
692 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
694 unsigned int max_read;
695 unsigned int max_write;
696 unsigned int min_offload;
697 __le16 compress_algorithm;
698 __u16 signing_algorithm;
700 /* save initital negprot hash */
701 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
702 bool signing_negotiated; /* true if valid signing context rcvd from server */
703 bool posix_ext_supported;
704 struct delayed_work reconnect; /* reconnect workqueue job */
705 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
706 unsigned long echo_interval;
709 * Number of targets available for reconnect. The more targets
710 * the more tasks have to wait to let the demultiplex thread
714 bool noblockcnt; /* use non-blocking connect() */
717 * If this is a session channel,
718 * primary_server holds the ref-counted
719 * pointer to primary channel connection for the session.
721 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
722 struct TCP_Server_Info *primary_server;
724 #ifdef CONFIG_CIFS_SWN_UPCALL
725 bool use_swn_dstaddr;
726 struct sockaddr_storage swn_dstaddr;
728 #ifdef CONFIG_CIFS_DFS_UPCALL
729 bool is_dfs_conn; /* if a dfs connection */
730 struct mutex refpath_lock; /* protects leaf_fullpath */
732 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
734 * origin_fullpath: first or original referral path
735 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
737 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
738 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
740 * format: \\HOST\SHARE\[OPTIONAL PATH]
742 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
746 struct cifs_credits {
748 unsigned int instance;
751 static inline unsigned int
752 in_flight(struct TCP_Server_Info *server)
755 spin_lock(&server->req_lock);
756 num = server->in_flight;
757 spin_unlock(&server->req_lock);
762 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
765 spin_lock(&server->req_lock);
767 spin_unlock(&server->req_lock);
768 return num >= num_credits;
772 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
775 server->ops->add_credits(server, credits, optype);
779 add_credits_and_wake_if(struct TCP_Server_Info *server,
780 const struct cifs_credits *credits, const int optype)
782 if (credits->value) {
783 server->ops->add_credits(server, credits, optype);
784 wake_up(&server->request_q);
789 set_credits(struct TCP_Server_Info *server, const int val)
791 server->ops->set_credits(server, val);
795 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
796 const unsigned int payload_size)
798 return server->ops->adjust_credits ?
799 server->ops->adjust_credits(server, credits, payload_size) : 0;
803 get_next_mid64(struct TCP_Server_Info *server)
805 return cpu_to_le64(server->ops->get_next_mid(server));
809 get_next_mid(struct TCP_Server_Info *server)
811 __u16 mid = server->ops->get_next_mid(server);
813 * The value in the SMB header should be little endian for easy
814 * on-the-wire decoding.
816 return cpu_to_le16(mid);
820 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
822 if (server->ops->revert_current_mid)
823 server->ops->revert_current_mid(server, val);
827 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
828 const struct smb2_hdr *shdr)
830 unsigned int num = le16_to_cpu(shdr->CreditCharge);
832 return revert_current_mid(server, num > 0 ? num : 1);
836 get_mid(const struct smb_hdr *smb)
838 return le16_to_cpu(smb->Mid);
842 compare_mid(__u16 mid, const struct smb_hdr *smb)
844 return mid == le16_to_cpu(smb->Mid);
848 * When the server supports very large reads and writes via POSIX extensions,
849 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
850 * including the RFC1001 length.
852 * Note that this might make for "interesting" allocation problems during
853 * writeback however as we have to allocate an array of pointers for the
854 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
856 * For reads, there is a similar problem as we need to allocate an array
857 * of kvecs to handle the receive, though that should only need to be done
860 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
861 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
864 * When the server doesn't allow large posix writes, only allow a rsize/wsize
865 * of 2^17-1 minus the size of the call header. That allows for a read or
866 * write up to the maximum size described by RFC1002.
868 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
869 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
871 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
874 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
875 * those values when posix extensions aren't in force. In actuality here, we
876 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
877 * to be ok with the extra byte even though Windows doesn't send writes that
882 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
884 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
885 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
888 * Macros to allow the TCP_Server_Info->net field and related code to drop out
889 * when CONFIG_NET_NS isn't set.
894 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
899 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
906 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
911 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
917 struct cifs_server_iface {
919 unsigned int rdma_capable : 1;
920 unsigned int rss_capable : 1;
921 struct sockaddr_storage sockaddr;
925 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
926 struct TCP_Server_Info *server;
927 __u8 signkey[SMB3_SIGN_KEY_SIZE];
931 * Session structure. One of these for each uid session with a particular host
934 struct list_head smb_ses_list;
935 struct list_head rlist; /* reconnect list */
936 struct list_head tcon_list;
937 struct cifs_tcon *tcon_ipc;
938 struct mutex session_mutex;
939 struct TCP_Server_Info *server; /* pointer to server info */
940 int ses_count; /* reference counter */
941 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
942 unsigned overrideSecFlg; /* if non-zero override global sec flags */
943 char *serverOS; /* name of operating system underlying server */
944 char *serverNOS; /* name of network operating system of server */
945 char *serverDomain; /* security realm of server */
946 __u64 Suid; /* remote smb uid */
947 kuid_t linux_uid; /* overriding owner of files on the mount */
948 kuid_t cred_uid; /* owner of credentials */
949 unsigned int capabilities;
950 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
951 char *user_name; /* must not be null except during init of sess
952 and after mount option parsing we fill it */
955 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
956 struct session_key auth_key;
957 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
958 enum securityEnum sectype; /* what security flavor was specified? */
959 bool sign; /* is signing required? */
962 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
963 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
964 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
965 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
968 * Network interfaces available on the server this session is
971 * Other channels can be opened by connecting and binding this
972 * session to interfaces from this list.
974 * iface_lock should be taken when accessing any of these fields
976 spinlock_t iface_lock;
977 /* ========= begin: protected by iface_lock ======== */
978 struct cifs_server_iface *iface_list;
980 unsigned long iface_last_update; /* jiffies */
981 /* ========= end: protected by iface_lock ======== */
983 spinlock_t chan_lock;
984 /* ========= begin: protected by chan_lock ======== */
985 #define CIFS_MAX_CHANNELS 16
986 #define CIFS_ALL_CHANNELS_SET(ses) \
987 ((1UL << (ses)->chan_count) - 1)
988 #define CIFS_ALL_CHANS_GOOD(ses) \
989 (!(ses)->chans_need_reconnect)
990 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
991 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
992 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
993 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
994 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
995 test_bit((index), &(ses)->chans_need_reconnect)
996 #define CIFS_CHAN_IN_RECONNECT(ses, index) \
997 ((ses)->chans[(index)].in_reconnect)
999 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1002 atomic_t chan_seq; /* round robin state */
1005 * chans_need_reconnect is a bitmap indicating which of the channels
1006 * under this smb session needs to be reconnected.
1007 * If not multichannel session, only one bit will be used.
1009 * We will ask for sess and tcon reconnection only if all the
1010 * channels are marked for needing reconnection. This will
1011 * enable the sessions on top to continue to live till any
1012 * of the channels below are active.
1014 unsigned long chans_need_reconnect;
1015 /* ========= end: protected by chan_lock ======== */
1019 cap_unix(struct cifs_ses *ses)
1021 return ses->server->vals->cap_unix & ses->capabilities;
1025 * common struct for holding inode info when searching for or updating an
1026 * inode with new info
1029 #define CIFS_FATTR_DFS_REFERRAL 0x1
1030 #define CIFS_FATTR_DELETE_PENDING 0x2
1031 #define CIFS_FATTR_NEED_REVAL 0x4
1032 #define CIFS_FATTR_INO_COLLISION 0x8
1033 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1034 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1047 unsigned int cf_nlink;
1048 unsigned int cf_dtype;
1049 struct timespec64 cf_atime;
1050 struct timespec64 cf_mtime;
1051 struct timespec64 cf_ctime;
1055 struct cached_dirent {
1056 struct list_head entry;
1061 struct cifs_fattr fattr;
1064 struct cached_dirents {
1067 struct dir_context *ctx; /*
1068 * Only used to make sure we only take entries
1069 * from a single context. Never dereferenced.
1071 struct mutex de_mutex;
1072 int pos; /* Expected ctx->pos */
1073 struct list_head entries;
1077 bool is_valid:1; /* Do we have a useable root fid */
1078 bool file_all_info_is_valid:1;
1080 unsigned long time; /* jiffies of when lease was taken */
1081 struct kref refcount;
1082 struct cifs_fid *fid;
1083 struct mutex fid_mutex;
1084 struct cifs_tcon *tcon;
1085 struct dentry *dentry;
1086 struct work_struct lease_break;
1087 struct smb2_file_all_info file_all_info;
1088 struct cached_dirents dirents;
1092 * there is one of these for each connection to a resource on a particular
1096 struct list_head tcon_list;
1098 struct list_head rlist; /* reconnect list */
1099 atomic_t num_local_opens; /* num of all opens including disconnected */
1100 atomic_t num_remote_opens; /* num of all network opens on server */
1101 struct list_head openFileList;
1102 spinlock_t open_file_lock; /* protects list above */
1103 struct cifs_ses *ses; /* pointer to session associated with */
1104 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1105 char *nativeFileSystem;
1106 char *password; /* for share-level security */
1107 __u32 tid; /* The 4 byte tree id */
1108 __u16 Flags; /* optional support bits */
1109 enum tid_status_enum status;
1110 atomic_t num_smbs_sent;
1113 atomic_t num_writes;
1115 atomic_t num_flushes;
1116 atomic_t num_oplock_brks;
1118 atomic_t num_closes;
1119 atomic_t num_deletes;
1120 atomic_t num_mkdirs;
1121 atomic_t num_posixopens;
1122 atomic_t num_posixmkdirs;
1123 atomic_t num_rmdirs;
1124 atomic_t num_renames;
1125 atomic_t num_t2renames;
1126 atomic_t num_ffirst;
1128 atomic_t num_fclose;
1129 atomic_t num_hardlinks;
1130 atomic_t num_symlinks;
1132 atomic_t num_acl_get;
1133 atomic_t num_acl_set;
1136 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1137 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1141 __u64 bytes_written;
1142 spinlock_t stat_lock; /* protects the two fields above */
1143 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1144 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1145 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1146 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1147 bool pipe:1; /* set if connection to pipe share */
1148 bool print:1; /* set if connection to printer share */
1151 bool nohandlecache:1; /* if strange server resource prob can turn off */
1153 bool seal:1; /* transport encryption for this mounted share */
1154 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1155 for this mount even if server would support */
1156 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1157 bool local_lease:1; /* check leases (only) on local system not remote */
1158 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1159 bool broken_sparse_sup; /* if server or share does not support sparse */
1160 bool need_reconnect:1; /* connection reset, tid now invalid */
1161 bool need_reopen_files:1; /* need to reopen tcon file handles */
1162 bool use_resilient:1; /* use resilient instead of durable handles */
1163 bool use_persistent:1; /* use persistent instead of durable handles */
1164 bool no_lease:1; /* Do not request leases on files or directories */
1165 bool use_witness:1; /* use witness protocol */
1166 __le32 capabilities;
1168 __u32 maximal_access;
1169 __u32 vol_serial_number;
1170 __le64 vol_create_time;
1171 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1172 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1173 __u32 ss_flags; /* sector size flags */
1174 __u32 perf_sector_size; /* best sector size for perf */
1176 __u32 max_bytes_chunk;
1177 __u32 max_bytes_copy;
1178 #ifdef CONFIG_CIFS_FSCACHE
1179 u64 resource_id; /* server resource id */
1180 struct fscache_volume *fscache; /* cookie for share */
1182 struct list_head pending_opens; /* list of incomplete opens */
1183 struct cached_fid crfid; /* Cached root fid */
1184 /* BB add field for back pointer to sb struct(s)? */
1185 #ifdef CONFIG_CIFS_DFS_UPCALL
1186 struct list_head ulist; /* cache update list */
1191 * This is a refcounted and timestamped container for a tcon pointer. The
1192 * container holds a tcon reference. It is considered safe to free one of
1193 * these when the tl_count goes to 0. The tl_time is the time of the last
1194 * "get" on the container.
1197 struct rb_node tl_rbnode;
1199 unsigned long tl_flags;
1200 #define TCON_LINK_MASTER 0
1201 #define TCON_LINK_PENDING 1
1202 #define TCON_LINK_IN_TREE 2
1203 unsigned long tl_time;
1205 struct cifs_tcon *tl_tcon;
1208 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1209 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1211 static inline struct cifs_tcon *
1212 tlink_tcon(struct tcon_link *tlink)
1214 return tlink->tl_tcon;
1217 static inline struct tcon_link *
1218 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1220 return cifs_sb->master_tlink;
1223 extern void cifs_put_tlink(struct tcon_link *tlink);
1225 static inline struct tcon_link *
1226 cifs_get_tlink(struct tcon_link *tlink)
1228 if (tlink && !IS_ERR(tlink))
1229 atomic_inc(&tlink->tl_count);
1233 /* This function is always expected to succeed */
1234 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1236 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1238 struct cifs_pending_open {
1239 struct list_head olist;
1240 struct tcon_link *tlink;
1245 struct cifs_deferred_close {
1246 struct list_head dlist;
1247 struct tcon_link *tlink;
1249 __u64 persistent_fid;
1254 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1255 * This is used to track byte stream locks on the file
1257 struct cifsLockInfo {
1258 struct list_head llist; /* pointer to next cifsLockInfo */
1259 struct list_head blist; /* pointer to locks blocked on this */
1260 wait_queue_head_t block_q;
1269 * One of these for each open instance of a file
1271 struct cifs_search_info {
1272 loff_t index_of_last_entry;
1273 __u16 entries_in_buffer;
1276 char *ntwrk_buf_start;
1277 char *srch_entries_start;
1279 const char *presume_name;
1280 unsigned int resume_name_len;
1284 bool smallBuf:1; /* so we know which buf_release function to call */
1287 #define ACL_NO_MODE ((umode_t)(-1))
1288 struct cifs_open_parms {
1289 struct cifs_tcon *tcon;
1290 struct cifs_sb_info *cifs_sb;
1295 struct cifs_fid *fid;
1302 __u64 persistent_fid; /* persist file id for smb2 */
1303 __u64 volatile_fid; /* volatile file id for smb2 */
1304 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1305 __u8 create_guid[16];
1307 struct cifs_pending_open *pending_open;
1309 #ifdef CONFIG_CIFS_DEBUG2
1311 #endif /* CIFS_DEBUG2 */
1315 struct cifs_fid_locks {
1316 struct list_head llist;
1317 struct cifsFileInfo *cfile; /* fid that owns locks */
1318 struct list_head locks; /* locks held by fid above */
1321 struct cifsFileInfo {
1322 /* following two lists are protected by tcon->open_file_lock */
1323 struct list_head tlist; /* pointer to next fid owned by tcon */
1324 struct list_head flist; /* next fid (file instance) for this inode */
1325 /* lock list below protected by cifsi->lock_sem */
1326 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1327 kuid_t uid; /* allows finding which FileInfo structure */
1328 __u32 pid; /* process id who opened file */
1329 struct cifs_fid fid; /* file id from remote */
1330 struct list_head rlist; /* reconnect list */
1331 /* BB add lock scope info here if needed */ ;
1332 /* lock scope id (0 if none) */
1333 struct dentry *dentry;
1334 struct tcon_link *tlink;
1335 unsigned int f_flags;
1336 bool invalidHandle:1; /* file closed via session abend */
1338 bool oplock_break_cancelled:1;
1339 unsigned int oplock_epoch; /* epoch from the lease break */
1340 __u32 oplock_level; /* oplock/lease level from the lease break */
1342 spinlock_t file_info_lock; /* protects four flag/count fields above */
1343 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1344 struct cifs_search_info srch_inf;
1345 struct work_struct oplock_break; /* work for oplock breaks */
1346 struct work_struct put; /* work for the final part of _put */
1347 struct delayed_work deferred;
1348 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1351 struct cifs_io_parms {
1353 __u64 persistent_fid; /* persist file id for smb2 */
1354 __u64 volatile_fid; /* volatile file id for smb2 */
1357 unsigned int length;
1358 struct cifs_tcon *tcon;
1359 struct TCP_Server_Info *server;
1362 struct cifs_aio_ctx {
1363 struct kref refcount;
1364 struct list_head list;
1365 struct mutex aio_mutex;
1366 struct completion done;
1367 struct iov_iter iter;
1369 struct cifsFileInfo *cfile;
1372 unsigned int npages;
1375 unsigned int total_len;
1378 * Indicates if this aio_ctx is for direct_io,
1379 * If yes, iter is a copy of the user passed iov_iter
1384 /* asynchronous read support */
1385 struct cifs_readdata {
1386 struct kref refcount;
1387 struct list_head list;
1388 struct completion done;
1389 struct cifsFileInfo *cfile;
1390 struct address_space *mapping;
1391 struct cifs_aio_ctx *ctx;
1394 unsigned int got_bytes;
1397 struct work_struct work;
1398 int (*read_into_pages)(struct TCP_Server_Info *server,
1399 struct cifs_readdata *rdata,
1401 int (*copy_into_pages)(struct TCP_Server_Info *server,
1402 struct cifs_readdata *rdata,
1403 struct iov_iter *iter);
1405 struct TCP_Server_Info *server;
1406 #ifdef CONFIG_CIFS_SMB_DIRECT
1409 unsigned int pagesz;
1410 unsigned int page_offset;
1411 unsigned int tailsz;
1412 struct cifs_credits credits;
1413 unsigned int nr_pages;
1414 struct page **pages;
1417 /* asynchronous write support */
1418 struct cifs_writedata {
1419 struct kref refcount;
1420 struct list_head list;
1421 struct completion done;
1422 enum writeback_sync_modes sync_mode;
1423 struct work_struct work;
1424 struct cifsFileInfo *cfile;
1425 struct cifs_aio_ctx *ctx;
1430 struct TCP_Server_Info *server;
1431 #ifdef CONFIG_CIFS_SMB_DIRECT
1434 unsigned int pagesz;
1435 unsigned int page_offset;
1436 unsigned int tailsz;
1437 struct cifs_credits credits;
1438 unsigned int nr_pages;
1439 struct page **pages;
1443 * Take a reference on the file private data. Must be called with
1444 * cfile->file_info_lock held.
1447 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1452 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1453 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1455 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1457 #define CIFS_CACHE_READ_FLG 1
1458 #define CIFS_CACHE_HANDLE_FLG 2
1459 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1460 #define CIFS_CACHE_WRITE_FLG 4
1461 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1462 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1464 #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))
1465 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1466 #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))
1469 * One of these for each file inode
1472 struct cifsInodeInfo {
1474 /* These must be contiguous */
1475 struct inode vfs_inode; /* the VFS's inode record */
1476 struct netfs_i_context netfs_ctx; /* Netfslib context */
1478 bool can_cache_brlcks;
1479 struct list_head llist; /* locks helb by this inode */
1481 * NOTE: Some code paths call down_read(lock_sem) twice, so
1482 * we must always use cifs_down_write() instead of down_write()
1483 * for this semaphore to avoid deadlocks.
1485 struct rw_semaphore lock_sem; /* protect the fields above */
1486 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1487 struct list_head openFileList;
1488 spinlock_t open_file_lock; /* protects openFileList */
1489 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1490 unsigned int oplock; /* oplock/lease level we have */
1491 unsigned int epoch; /* used to track lease state changes */
1492 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1493 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1494 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1495 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1496 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1497 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1498 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1499 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1500 unsigned long flags;
1501 spinlock_t writers_lock;
1502 unsigned int writers; /* Number of writers on this inode */
1503 unsigned long time; /* jiffies of last update of inode */
1504 u64 server_eof; /* current file size on server -- protected by i_lock */
1505 u64 uniqueid; /* server inode number */
1506 u64 createtime; /* creation time on server */
1507 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1508 struct list_head deferred_closes; /* list of deferred closes */
1509 spinlock_t deferred_lock; /* protection on deferred list */
1510 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1513 static inline struct cifsInodeInfo *
1514 CIFS_I(struct inode *inode)
1516 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1519 static inline struct cifs_sb_info *
1520 CIFS_SB(struct super_block *sb)
1522 return sb->s_fs_info;
1525 static inline struct cifs_sb_info *
1526 CIFS_FILE_SB(struct file *file)
1528 return CIFS_SB(file_inode(file)->i_sb);
1531 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1533 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1540 convert_delimiter(char *path, char delim)
1542 char old_delim, *pos;
1550 while ((pos = strchr(pos, old_delim)))
1554 #define cifs_stats_inc atomic_inc
1556 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1560 spin_lock(&tcon->stat_lock);
1561 tcon->bytes_written += bytes;
1562 spin_unlock(&tcon->stat_lock);
1566 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1569 spin_lock(&tcon->stat_lock);
1570 tcon->bytes_read += bytes;
1571 spin_unlock(&tcon->stat_lock);
1576 * This is the prototype for the mid receive function. This function is for
1577 * receiving the rest of the SMB frame, starting with the WordCount (which is
1578 * just after the MID in struct smb_hdr). Note:
1580 * - This will be called by cifsd, with no locks held.
1581 * - The mid will still be on the pending_mid_q.
1582 * - mid->resp_buf will point to the current buffer.
1584 * Returns zero on a successful receive, or an error. The receive state in
1585 * the TCP_Server_Info will also be updated.
1587 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1588 struct mid_q_entry *mid);
1591 * This is the prototype for the mid callback function. This is called once the
1592 * mid has been received off of the socket. When creating one, take special
1593 * care to avoid deadlocks. Things to bear in mind:
1595 * - it will be called by cifsd, with no locks held
1596 * - the mid will be removed from any lists
1598 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1601 * This is the protopyte for mid handle function. This is called once the mid
1602 * has been recognized after decryption of the message.
1604 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1605 struct mid_q_entry *mid);
1607 /* one of these for every pending CIFS request to the server */
1608 struct mid_q_entry {
1609 struct list_head qhead; /* mids waiting on reply from this server */
1610 struct kref refcount;
1611 struct TCP_Server_Info *server; /* server corresponding to this mid */
1612 __u64 mid; /* multiplex id */
1613 __u16 credits; /* number of credits consumed by this mid */
1614 __u16 credits_received; /* number of credits from the response */
1615 __u32 pid; /* process id */
1616 __u32 sequence_number; /* for CIFS signing */
1617 unsigned long when_alloc; /* when mid was created */
1618 #ifdef CONFIG_CIFS_STATS2
1619 unsigned long when_sent; /* time when smb send finished */
1620 unsigned long when_received; /* when demux complete (taken off wire) */
1622 mid_receive_t *receive; /* call receive callback */
1623 mid_callback_t *callback; /* call completion callback */
1624 mid_handle_t *handle; /* call handle mid callback */
1625 void *callback_data; /* general purpose pointer for callback */
1626 struct task_struct *creator;
1627 void *resp_buf; /* pointer to received SMB header */
1628 unsigned int resp_buf_size;
1629 int mid_state; /* wish this were enum but can not pass to wait_event */
1630 unsigned int mid_flags;
1631 __le16 command; /* smb command code */
1632 unsigned int optype; /* operation type */
1633 bool large_buf:1; /* if valid response, is pointer to large buf */
1634 bool multiRsp:1; /* multiple trans2 responses for one request */
1635 bool multiEnd:1; /* both received */
1636 bool decrypted:1; /* decrypted entry */
1639 struct close_cancelled_open {
1640 struct cifs_fid fid;
1641 struct cifs_tcon *tcon;
1642 struct work_struct work;
1647 /* Make code in transport.c a little cleaner by moving
1648 update of optional stats into function below */
1649 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1651 atomic_inc(&server->in_send);
1654 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1656 atomic_dec(&server->in_send);
1659 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1661 atomic_inc(&server->num_waiters);
1664 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1666 atomic_dec(&server->num_waiters);
1669 #ifdef CONFIG_CIFS_STATS2
1670 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1672 mid->when_sent = jiffies;
1675 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1680 /* for pending dnotify requests */
1681 struct dir_notify_req {
1682 struct list_head lhead;
1689 __u32 filter; /* CompletionFilter (for multishot) */
1694 struct dfs_info3_param {
1695 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1705 struct list_head list;
1706 struct cifsFileInfo *cfile;
1709 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1712 kfree(param->path_name);
1713 kfree(param->node_name);
1717 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1718 int number_of_items)
1721 if ((number_of_items == 0) || (param == NULL))
1723 for (i = 0; i < number_of_items; i++) {
1724 kfree(param[i].path_name);
1725 kfree(param[i].node_name);
1730 static inline bool is_interrupt_error(int error)
1735 case -ERESTARTNOHAND:
1736 case -ERESTARTNOINTR:
1742 static inline bool is_retryable_error(int error)
1744 if (is_interrupt_error(error) || error == -EAGAIN)
1750 /* cifs_get_writable_file() flags */
1751 #define FIND_WR_ANY 0
1752 #define FIND_WR_FSUID_ONLY 1
1753 #define FIND_WR_WITH_DELETE 2
1756 #define MID_REQUEST_ALLOCATED 1
1757 #define MID_REQUEST_SUBMITTED 2
1758 #define MID_RESPONSE_RECEIVED 4
1759 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1760 #define MID_RESPONSE_MALFORMED 0x10
1761 #define MID_SHUTDOWN 0x20
1764 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1765 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1767 /* Types of response buffer returned from SendReceive2 */
1768 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1769 #define CIFS_SMALL_BUFFER 1
1770 #define CIFS_LARGE_BUFFER 2
1771 #define CIFS_IOVEC 4 /* array of response buffers */
1773 /* Type of Request to SendReceive2 */
1774 #define CIFS_BLOCKING_OP 1 /* operation can block */
1775 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1776 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1777 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1778 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1779 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1781 /* Type of request operation */
1782 #define CIFS_ECHO_OP 0x080 /* echo request */
1783 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1784 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1785 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1786 /* Lower bitmask values are reserved by others below. */
1787 #define CIFS_SESS_OP 0x2000 /* session setup request */
1788 #define CIFS_OP_MASK 0x2780 /* mask request type */
1790 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1791 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1792 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1794 /* Security Flags: indicate type of session setup needed */
1795 #define CIFSSEC_MAY_SIGN 0x00001
1796 #define CIFSSEC_MAY_NTLMV2 0x00004
1797 #define CIFSSEC_MAY_KRB5 0x00008
1798 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1799 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1801 #define CIFSSEC_MUST_SIGN 0x01001
1802 /* note that only one of the following can be set so the
1803 result of setting MUST flags more than once will be to
1804 require use of the stronger protocol */
1805 #define CIFSSEC_MUST_NTLMV2 0x04004
1806 #define CIFSSEC_MUST_KRB5 0x08008
1807 #ifdef CONFIG_CIFS_UPCALL
1808 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1810 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1812 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1813 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1815 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1816 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1817 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1819 *****************************************************************
1820 * All constants go here
1821 *****************************************************************
1824 #define UID_HASH (16)
1827 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1828 * following to be declared.
1831 /****************************************************************************
1832 * Locking notes. All updates to global variables and lists should be
1833 * protected by spinlocks or semaphores.
1837 * GlobalMid_Lock protects:
1838 * list operations on pending_mid_q and oplockQ
1839 * updates to XID counters, multiplex id and SMB sequence numbers
1840 * list operations on global DnotifyReqList
1841 * updates to ses->status and TCP_Server_Info->tcpStatus
1842 * updates to server->CurrentMid
1843 * tcp_ses_lock protects:
1844 * list operations on tcp and SMB session lists
1845 * tcon->open_file_lock protects the list of open files hanging off the tcon
1846 * inode->open_file_lock protects the openFileList hanging off the inode
1847 * cfile->file_info_lock protects counters and fields in cifs file struct
1848 * f_owner.lock protects certain per file struct operations
1849 * mapping->page_lock protects certain per page operations
1851 * Note that the cifs_tcon.open_file_lock should be taken before
1852 * not after the cifsInodeInfo.open_file_lock
1856 * cifsInodeInfo->lock_sem protects:
1857 * the list of locks held by the inode
1859 ****************************************************************************/
1861 #ifdef DECLARE_GLOBALS_HERE
1862 #define GLOBAL_EXTERN
1864 #define GLOBAL_EXTERN extern
1868 * the list of TCP_Server_Info structures, ie each of the sockets
1869 * connecting our client to a distinct server (ip address), is
1870 * chained together by cifs_tcp_ses_list. The list of all our SMB
1871 * sessions (and from that the tree connections) can be found
1872 * by iterating over cifs_tcp_ses_list
1874 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1877 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1878 * tcp session, and the list of tcon's per smb session. It also protects
1879 * the reference counters for the server, smb session, and tcon. It also
1880 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1881 * changes to the tcon->tidStatus should be done while holding this lock.
1882 * generally the locks should be taken in order tcp_ses_lock before
1883 * tcon->open_file_lock and that before file->file_info_lock since the
1884 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1886 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1889 * Global transaction id (XID) information
1891 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1892 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1893 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1894 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1895 /* on midQ entries */
1897 * Global counters, updated atomically
1899 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1900 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1901 GLOBAL_EXTERN atomic_t tcpSesNextId;
1902 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1903 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1904 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1906 /* Various Debug counters */
1907 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1908 #ifdef CONFIG_CIFS_STATS2
1909 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1910 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1911 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1913 GLOBAL_EXTERN atomic_t smBufAllocCount;
1914 GLOBAL_EXTERN atomic_t midCount;
1917 extern bool enable_oplocks; /* enable or disable oplocks */
1918 extern bool lookupCacheEnabled;
1919 extern unsigned int global_secflags; /* if on, session setup sent
1920 with more secure ntlmssp2 challenge/resp */
1921 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1922 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1923 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1924 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1925 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1926 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1927 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1928 extern unsigned int cifs_min_small; /* min size of small buf pool */
1929 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1930 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1932 void cifs_oplock_break(struct work_struct *work);
1933 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1934 void smb2_deferred_work_close(struct work_struct *work);
1936 extern const struct slow_work_ops cifs_oplock_break_ops;
1937 extern struct workqueue_struct *cifsiod_wq;
1938 extern struct workqueue_struct *decrypt_wq;
1939 extern struct workqueue_struct *fileinfo_put_wq;
1940 extern struct workqueue_struct *cifsoplockd_wq;
1941 extern struct workqueue_struct *deferredclose_wq;
1942 extern __u32 cifs_lock_secret;
1944 extern mempool_t *cifs_mid_poolp;
1946 /* Operations for different SMB versions */
1947 #define SMB1_VERSION_STRING "1.0"
1948 extern struct smb_version_operations smb1_operations;
1949 extern struct smb_version_values smb1_values;
1950 #define SMB20_VERSION_STRING "2.0"
1951 extern struct smb_version_operations smb20_operations;
1952 extern struct smb_version_values smb20_values;
1953 #define SMB21_VERSION_STRING "2.1"
1954 extern struct smb_version_operations smb21_operations;
1955 extern struct smb_version_values smb21_values;
1956 #define SMBDEFAULT_VERSION_STRING "default"
1957 extern struct smb_version_values smbdefault_values;
1958 #define SMB3ANY_VERSION_STRING "3"
1959 extern struct smb_version_values smb3any_values;
1960 #define SMB30_VERSION_STRING "3.0"
1961 extern struct smb_version_operations smb30_operations;
1962 extern struct smb_version_values smb30_values;
1963 #define SMB302_VERSION_STRING "3.02"
1964 #define ALT_SMB302_VERSION_STRING "3.0.2"
1965 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1966 extern struct smb_version_values smb302_values;
1967 #define SMB311_VERSION_STRING "3.1.1"
1968 #define ALT_SMB311_VERSION_STRING "3.11"
1969 extern struct smb_version_operations smb311_operations;
1970 extern struct smb_version_values smb311_values;
1972 static inline char *get_security_type_str(enum securityEnum sectype)
1976 return "RawNTLMSSP";
1986 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1988 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
1991 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
1994 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
1995 * Subsystem Notifies That a Share Is a DFS Share.
1997 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
1998 * Application Updates a Share.
2000 if (!tcon || !tcon->ses || !tcon->ses->server)
2002 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
2003 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
2006 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
2007 const struct dfs_info3_param *ref)
2010 * Check if all targets are capable of handling DFS referrals as per
2011 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
2013 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
2016 static inline u64 cifs_flock_len(struct file_lock *fl)
2018 return fl->fl_end == OFFSET_MAX ? 0 : fl->fl_end - fl->fl_start + 1;
2021 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
2023 if (WARN_ON_ONCE(!ses || !ses->server))
2026 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
2027 * servers do require it during NTLMSSP.
2029 if (ses->server->dialect <= SMB20_PROT_ID)
2030 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
2031 return sizeof(ses->workstation_name);
2034 #endif /* _CIFS_GLOB_H */