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 "cifs_fs_sb.h"
21 #include <crypto/internal/hash.h>
22 #include <linux/scatterlist.h>
23 #include <uapi/linux/cifs/cifs_mount.h>
24 #include "../smbfs_common/smb2pdu.h"
27 #define SMB_PATH_MAX 260
29 #define RFC1001_PORT 139
32 * The sizes of various internal tables and strings
34 #define MAX_UID_INFO 16
35 #define MAX_SES_INFO 2
36 #define MAX_TCON_INFO 4
38 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
40 #define CIFS_MIN_RCV_POOL 4
42 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
44 * default attribute cache timeout (jiffies)
46 #define CIFS_DEF_ACTIMEO (1 * HZ)
49 * max attribute cache timeout (jiffies) - 2^30
51 #define CIFS_MAX_ACTIMEO (1 << 30)
54 * Max persistent and resilient handle timeout (milliseconds).
55 * Windows durable max was 960000 (16 minutes)
57 #define SMB3_MAX_HANDLE_TIMEOUT 960000
60 * MAX_REQ is the maximum number of requests that WE will send
61 * on one socket concurrently.
63 #define CIFS_MAX_REQ 32767
65 #define RFC1001_NAME_LEN 15
66 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
68 /* maximum length of ip addr as a string (including ipv6 and sctp) */
69 #define SERVER_NAME_LENGTH 80
70 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
72 /* echo interval in seconds */
73 #define SMB_ECHO_INTERVAL_MIN 1
74 #define SMB_ECHO_INTERVAL_MAX 600
75 #define SMB_ECHO_INTERVAL_DEFAULT 60
77 /* dns resolution intervals in seconds */
78 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
79 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
81 /* maximum number of PDUs in one compound */
82 #define MAX_COMPOUND 5
85 * Default number of credits to keep available for SMB3.
86 * This value is chosen somewhat arbitrarily. The Windows client
87 * defaults to 128 credits, the Windows server allows clients up to
88 * 512 credits (or 8K for later versions), and the NetApp server
89 * does not limit clients at all. Choose a high enough default value
90 * such that the client shouldn't limit performance, but allow mount
91 * to override (until you approach 64K, where we limit credits to 65000
92 * to reduce possibility of seeing more server credit overflow bugs.
94 #define SMB2_MAX_CREDITS_AVAILABLE 32000
98 #ifndef XATTR_DOS_ATTRIB
99 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
102 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
105 * CIFS vfs client Status information (based on what we know.)
108 /* associated with each tcp and smb session */
120 CifsNeedFilesInvalidate,
121 CifsInFilesInvalidate
125 Unspecified = 0, /* not specified */
126 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
127 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
128 Kerberos, /* Kerberos via SPNEGO */
136 /* crypto security descriptor definition */
138 struct shash_desc shash;
142 /* crypto hashing related structure/fields, not specific to a sec mech */
143 struct cifs_secmech {
144 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
145 struct crypto_shash *md5; /* md5 hash function */
146 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
147 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
148 struct crypto_shash *sha512; /* sha512 hash function */
149 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
150 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
151 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
152 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
153 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
154 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
155 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
158 /* per smb session structure/fields */
159 struct ntlmssp_auth {
160 bool sesskey_per_smbsess; /* whether session key is per smb session */
161 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
162 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
163 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
164 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
172 struct cifs_sid osid;
173 struct cifs_sid gsid;
174 struct cifs_ntace *ntaces;
175 struct cifs_ace *aces;
179 *****************************************************************
180 * Except the CIFS PDUs themselves all the
181 * globally interesting structs should go here
182 *****************************************************************
186 * A smb_rqst represents a complete request to be issued to a server. It's
187 * formed by a kvec array, followed by an array of pages. Page data is assumed
188 * to start at the beginning of the first page.
191 struct kvec *rq_iov; /* array of kvecs */
192 unsigned int rq_nvec; /* number of kvecs in array */
193 struct page **rq_pages; /* pointer to array of page ptrs */
194 unsigned int rq_offset; /* the offset to the 1st page */
195 unsigned int rq_npages; /* number pages in array */
196 unsigned int rq_pagesz; /* page size to use */
197 unsigned int rq_tailsz; /* length of last page */
201 struct TCP_Server_Info;
205 struct dfs_info3_param;
207 struct smb3_fs_context;
209 struct cifs_readdata;
210 struct cifs_writedata;
211 struct cifs_io_parms;
212 struct cifs_search_info;
213 struct cifsInodeInfo;
214 struct cifs_open_parms;
217 struct smb_version_operations {
218 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
219 struct mid_q_entry *);
220 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
221 /* setup request: allocate mid, sign message */
222 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
223 struct TCP_Server_Info *,
225 /* setup async request: allocate mid, sign message */
226 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
228 /* check response: verify signature, map error */
229 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
231 void (*add_credits)(struct TCP_Server_Info *server,
232 const struct cifs_credits *credits,
234 void (*set_credits)(struct TCP_Server_Info *, const int);
235 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
236 unsigned int (*get_credits)(struct mid_q_entry *);
237 __u64 (*get_next_mid)(struct TCP_Server_Info *);
238 void (*revert_current_mid)(struct TCP_Server_Info *server,
239 const unsigned int val);
240 /* data offset from read response message */
241 unsigned int (*read_data_offset)(char *);
243 * Data length from read response message
244 * When in_remaining is true, the returned data length is in
245 * message field DataRemaining for out-of-band data read (e.g through
246 * Memory Registration RDMA write in SMBD).
247 * Otherwise, the returned data length is in message field DataLength.
249 unsigned int (*read_data_length)(char *, bool in_remaining);
250 /* map smb to linux error */
251 int (*map_error)(char *, bool);
252 /* find mid corresponding to the response message */
253 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
254 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
255 void (*clear_stats)(struct cifs_tcon *);
256 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
257 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
258 /* verify the message */
259 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
260 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
261 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
262 void (*downgrade_oplock)(struct TCP_Server_Info *server,
263 struct cifsInodeInfo *cinode, __u32 oplock,
264 unsigned int epoch, bool *purge_cache);
265 /* process transaction2 response */
266 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
268 /* check if we need to negotiate */
269 bool (*need_neg)(struct TCP_Server_Info *);
270 /* negotiate to the server */
271 int (*negotiate)(const unsigned int xid,
272 struct cifs_ses *ses,
273 struct TCP_Server_Info *server);
274 /* set negotiated write size */
275 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
276 /* set negotiated read size */
277 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
278 /* setup smb sessionn */
279 int (*sess_setup)(const unsigned int, struct cifs_ses *,
280 struct TCP_Server_Info *server,
281 const struct nls_table *);
282 /* close smb session */
283 int (*logoff)(const unsigned int, struct cifs_ses *);
284 /* connect to a server share */
285 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
286 struct cifs_tcon *, const struct nls_table *);
287 /* close tree connecion */
288 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
289 /* get DFS referrals */
290 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
291 const char *, struct dfs_info3_param **,
292 unsigned int *, const struct nls_table *, int);
293 /* informational QFS call */
294 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
295 struct cifs_sb_info *);
296 /* check if a path is accessible or not */
297 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
298 struct cifs_sb_info *, const char *);
299 /* query path data from the server */
300 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
301 struct cifs_sb_info *, const char *,
302 FILE_ALL_INFO *, bool *, bool *);
303 /* query file data from the server */
304 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
305 struct cifs_fid *, FILE_ALL_INFO *);
306 /* query reparse tag from srv to determine which type of special file */
307 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
308 struct cifs_sb_info *cifs_sb, const char *path,
310 /* get server index number */
311 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
312 struct cifs_sb_info *, const char *,
313 u64 *uniqueid, FILE_ALL_INFO *);
314 /* set size by path */
315 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
316 const char *, __u64, struct cifs_sb_info *, bool);
317 /* set size by file handle */
318 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
319 struct cifsFileInfo *, __u64, bool);
321 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
323 int (*set_compression)(const unsigned int, struct cifs_tcon *,
324 struct cifsFileInfo *);
325 /* check if we can send an echo or nor */
326 bool (*can_echo)(struct TCP_Server_Info *);
327 /* send echo request */
328 int (*echo)(struct TCP_Server_Info *);
329 /* create directory */
330 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
331 umode_t mode, struct cifs_tcon *tcon,
332 const char *full_path,
333 struct cifs_sb_info *cifs_sb);
334 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
335 struct cifs_tcon *tcon, const char *name,
336 struct cifs_sb_info *sb);
337 /* set info on created directory */
338 void (*mkdir_setinfo)(struct inode *, const char *,
339 struct cifs_sb_info *, struct cifs_tcon *,
341 /* remove directory */
342 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
343 struct cifs_sb_info *);
345 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
346 struct cifs_sb_info *);
347 /* open, rename and delete file */
348 int (*rename_pending_delete)(const char *, struct dentry *,
350 /* send rename request */
351 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
352 const char *, struct cifs_sb_info *);
353 /* send create hardlink request */
354 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
355 const char *, const char *,
356 struct cifs_sb_info *);
357 /* query symlink target */
358 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
359 struct cifs_sb_info *, const char *,
361 /* open a file for non-posix mounts */
362 int (*open)(const unsigned int, struct cifs_open_parms *,
363 __u32 *, FILE_ALL_INFO *);
364 /* set fid protocol-specific info */
365 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
367 void (*close)(const unsigned int, struct cifs_tcon *,
369 /* close a file, returning file attributes and timestamps */
370 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
371 struct cifsFileInfo *pfile_info);
372 /* send a flush request to the server */
373 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
374 /* async read from the server */
375 int (*async_readv)(struct cifs_readdata *);
376 /* async write to the server */
377 int (*async_writev)(struct cifs_writedata *,
378 void (*release)(struct kref *));
379 /* sync read from the server */
380 int (*sync_read)(const unsigned int, struct cifs_fid *,
381 struct cifs_io_parms *, unsigned int *, char **,
383 /* sync write to the server */
384 int (*sync_write)(const unsigned int, struct cifs_fid *,
385 struct cifs_io_parms *, unsigned int *, struct kvec *,
387 /* open dir, start readdir */
388 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
389 const char *, struct cifs_sb_info *,
390 struct cifs_fid *, __u16,
391 struct cifs_search_info *);
392 /* continue readdir */
393 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
395 __u16, struct cifs_search_info *srch_inf);
397 int (*close_dir)(const unsigned int, struct cifs_tcon *,
399 /* calculate a size of SMB message */
400 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
401 /* check for STATUS_PENDING and process the response if yes */
402 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
403 /* check for STATUS_NETWORK_SESSION_EXPIRED */
404 bool (*is_session_expired)(char *);
405 /* send oplock break response */
406 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
407 struct cifsInodeInfo *);
408 /* query remote filesystem */
409 int (*queryfs)(const unsigned int, struct cifs_tcon *,
410 struct cifs_sb_info *, struct kstatfs *);
411 /* send mandatory brlock to the server */
412 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
413 __u64, __u32, int, int, bool);
414 /* unlock range of mandatory locks */
415 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
417 /* push brlocks from the cache to the server */
418 int (*push_mand_locks)(struct cifsFileInfo *);
419 /* get lease key of the inode */
420 void (*get_lease_key)(struct inode *, struct cifs_fid *);
421 /* set lease key of the inode */
422 void (*set_lease_key)(struct inode *, struct cifs_fid *);
423 /* generate new lease key */
424 void (*new_lease_key)(struct cifs_fid *);
425 int (*generate_signingkey)(struct cifs_ses *ses,
426 struct TCP_Server_Info *server);
427 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
428 bool allocate_crypto);
429 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
430 struct cifsFileInfo *src_file);
431 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
432 struct cifsFileInfo *src_file, void __user *);
433 int (*notify)(const unsigned int xid, struct file *pfile,
435 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
436 struct cifs_sb_info *, const unsigned char *,
437 char *, unsigned int *);
438 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
439 struct cifs_sb_info *, const unsigned char *,
440 char *, unsigned int *);
441 /* if we can do cache read operations */
442 bool (*is_read_op)(__u32);
443 /* set oplock level for the inode */
444 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
446 /* create lease context buffer for CREATE request */
447 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
448 /* parse lease context buffer and return oplock/epoch info */
449 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
450 ssize_t (*copychunk_range)(const unsigned int,
451 struct cifsFileInfo *src_file,
452 struct cifsFileInfo *target_file,
453 u64 src_off, u64 len, u64 dest_off);
454 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
455 struct cifsFileInfo *target_file, u64 src_off, u64 len,
457 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
458 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
459 const unsigned char *, const unsigned char *, char *,
460 size_t, struct cifs_sb_info *);
461 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
462 const char *, const void *, const __u16,
463 const struct nls_table *, struct cifs_sb_info *);
464 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
465 const char *, u32 *, u32);
466 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
467 const struct cifs_fid *, u32 *, u32);
468 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
470 /* writepages retry size */
471 unsigned int (*wp_retry_size)(struct inode *);
472 /* get mtu credits */
473 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
474 unsigned int *, struct cifs_credits *);
475 /* adjust previously taken mtu credits to request size */
476 int (*adjust_credits)(struct TCP_Server_Info *server,
477 struct cifs_credits *credits,
478 const unsigned int payload_size);
479 /* check if we need to issue closedir */
480 bool (*dir_needs_close)(struct cifsFileInfo *);
481 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
483 /* init transform request - used for encryption for now */
484 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
485 struct smb_rqst *, struct smb_rqst *);
486 int (*is_transform_hdr)(void *buf);
487 int (*receive_transform)(struct TCP_Server_Info *,
488 struct mid_q_entry **, char **, int *);
489 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
491 int (*next_header)(char *);
492 /* ioctl passthrough for query_info */
493 int (*ioctl_query_info)(const unsigned int xid,
494 struct cifs_tcon *tcon,
495 struct cifs_sb_info *cifs_sb,
496 __le16 *path, int is_dir,
498 /* make unix special files (block, char, fifo, socket) */
499 int (*make_node)(unsigned int xid,
501 struct dentry *dentry,
502 struct cifs_tcon *tcon,
503 const char *full_path,
505 dev_t device_number);
506 /* version specific fiemap implementation */
507 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
508 struct fiemap_extent_info *, u64, u64);
509 /* version specific llseek implementation */
510 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
511 /* Check for STATUS_IO_TIMEOUT */
512 bool (*is_status_io_timeout)(char *buf);
513 /* Check for STATUS_NETWORK_NAME_DELETED */
514 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
517 struct smb_version_values {
518 char *version_string;
520 __u32 req_capabilities;
521 __u32 large_lock_type;
522 __u32 exclusive_lock_type;
523 __u32 shared_lock_type;
524 __u32 unlock_lock_type;
525 size_t header_preamble_size;
527 size_t max_header_size;
528 size_t read_rsp_size;
530 unsigned int cap_unix;
531 unsigned int cap_nt_find;
532 unsigned int cap_large_files;
533 __u16 signing_enabled;
534 __u16 signing_required;
535 size_t create_lease_size;
538 #define HEADER_SIZE(server) (server->vals->header_size)
539 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
542 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
543 * trying to reuse existing superblock for a new mount
545 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
546 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
547 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
548 CIFS_MOUNT_MAP_SFM_CHR | \
549 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
550 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
551 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
552 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
553 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
554 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
555 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
556 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
557 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
558 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
561 * Generic VFS superblock mount flags (s_flags) to consider when
562 * trying to reuse existing superblock for a new mount
564 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
565 SB_NODEV | SB_SYNCHRONOUS)
567 struct cifs_mnt_data {
568 struct cifs_sb_info *cifs_sb;
569 struct smb3_fs_context *ctx;
573 static inline unsigned int
574 get_rfc1002_length(void *buf)
576 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
580 inc_rfc1001_len(void *buf, int count)
582 be32_add_cpu((__be32 *)buf, count);
585 struct TCP_Server_Info {
586 struct list_head tcp_ses_list;
587 struct list_head smb_ses_list;
588 __u64 conn_id; /* connection identifier (useful for debugging) */
589 int srv_count; /* reference counter */
590 /* 15 character server name + 0x20 16th byte indicating type = srv */
591 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
592 struct smb_version_operations *ops;
593 struct smb_version_values *vals;
594 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
595 enum statusEnum tcpStatus; /* what we think the status is */
596 char *hostname; /* hostname portion of UNC string */
597 struct socket *ssocket;
598 struct sockaddr_storage dstaddr;
599 struct sockaddr_storage srcaddr; /* locally bind to this IP */
603 wait_queue_head_t response_q;
604 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
605 struct list_head pending_mid_q;
606 bool noblocksnd; /* use blocking sendmsg */
607 bool noautotune; /* do not autotune send buf sizes */
610 unsigned int credits; /* send no more requests at once */
611 unsigned int max_credits; /* can override large 32000 default at mnt */
612 unsigned int in_flight; /* number of requests on the wire to server */
613 unsigned int max_in_flight; /* max number of requests that were on wire */
614 spinlock_t req_lock; /* protect the two values above */
615 struct mutex srv_mutex;
616 struct task_struct *tsk;
617 char server_GUID[16];
619 bool sign; /* is signing enabled on this connection? */
620 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
621 bool session_estab; /* mark when very first sess is established */
622 int echo_credits; /* echo reserved slots */
623 int oplock_credits; /* oplock break reserved slots */
624 bool echoes:1; /* enable echoes */
625 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
626 u16 dialect; /* dialect index that server chose */
627 bool oplocks:1; /* enable oplocks */
628 unsigned int maxReq; /* Clients should submit no more */
629 /* than maxReq distinct unanswered SMBs to the server when using */
630 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
631 unsigned int maxBuf; /* maxBuf specifies the maximum */
632 /* message size the server can send or receive for non-raw SMBs */
633 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
634 /* when socket is setup (and during reconnect) before NegProt sent */
635 unsigned int max_rw; /* maxRw specifies the maximum */
636 /* message size the server can send or receive for */
637 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
638 unsigned int capabilities; /* selective disabling of caps by smb sess */
639 int timeAdj; /* Adjust for difference in server time zone in sec */
640 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
641 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
642 /* 16th byte of RFC1001 workstation name is always null */
643 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
644 __u32 sequence_number; /* for signing, protected by srv_mutex */
645 __u32 reconnect_instance; /* incremented on each reconnect */
646 struct session_key session_key;
647 unsigned long lstrp; /* when we got last response from this server */
648 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
649 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
650 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
651 char negflavor; /* NEGOTIATE response flavor */
652 /* extended security flavors that server supports */
653 bool sec_ntlmssp; /* supports NTLMSSP */
654 bool sec_kerberosu2u; /* supports U2U Kerberos */
655 bool sec_kerberos; /* supports plain Kerberos */
656 bool sec_mskerberos; /* supports legacy MS Kerberos */
657 bool large_buf; /* is current buffer large? */
658 /* use SMBD connection instead of socket */
660 /* point to the SMBD connection if RDMA is used instead of socket */
661 struct smbd_connection *smbd_conn;
662 struct delayed_work echo; /* echo ping workqueue job */
663 struct delayed_work resolve; /* dns resolution workqueue job */
664 char *smallbuf; /* pointer to current "small" buffer */
665 char *bigbuf; /* pointer to current "big" buffer */
666 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
667 unsigned int pdu_size;
668 unsigned int total_read; /* total amount of data read in this pass */
669 atomic_t in_send; /* requests trying to send */
670 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
671 #ifdef CONFIG_CIFS_STATS2
672 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
673 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
674 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
675 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
676 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
678 unsigned int max_read;
679 unsigned int max_write;
680 unsigned int min_offload;
681 __le16 compress_algorithm;
682 __u16 signing_algorithm;
684 /* save initital negprot hash */
685 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
686 bool signing_negotiated; /* true if valid signing context rcvd from server */
687 bool posix_ext_supported;
688 struct delayed_work reconnect; /* reconnect workqueue job */
689 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
690 unsigned long echo_interval;
693 * Number of targets available for reconnect. The more targets
694 * the more tasks have to wait to let the demultiplex thread
698 bool noblockcnt; /* use non-blocking connect() */
701 * If this is a session channel,
702 * primary_server holds the ref-counted
703 * pointer to primary channel connection for the session.
705 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
706 struct TCP_Server_Info *primary_server;
708 #ifdef CONFIG_CIFS_SWN_UPCALL
709 bool use_swn_dstaddr;
710 struct sockaddr_storage swn_dstaddr;
712 #ifdef CONFIG_CIFS_DFS_UPCALL
713 bool is_dfs_conn; /* if a dfs connection */
714 struct mutex refpath_lock; /* protects leaf_fullpath */
716 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
718 * origin_fullpath: first or original referral path
719 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
721 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
722 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
724 * format: \\HOST\SHARE\[OPTIONAL PATH]
726 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
730 struct cifs_credits {
732 unsigned int instance;
735 static inline unsigned int
736 in_flight(struct TCP_Server_Info *server)
739 spin_lock(&server->req_lock);
740 num = server->in_flight;
741 spin_unlock(&server->req_lock);
746 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
749 spin_lock(&server->req_lock);
751 spin_unlock(&server->req_lock);
752 return num >= num_credits;
756 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
759 server->ops->add_credits(server, credits, optype);
763 add_credits_and_wake_if(struct TCP_Server_Info *server,
764 const struct cifs_credits *credits, const int optype)
766 if (credits->value) {
767 server->ops->add_credits(server, credits, optype);
768 wake_up(&server->request_q);
773 set_credits(struct TCP_Server_Info *server, const int val)
775 server->ops->set_credits(server, val);
779 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
780 const unsigned int payload_size)
782 return server->ops->adjust_credits ?
783 server->ops->adjust_credits(server, credits, payload_size) : 0;
787 get_next_mid64(struct TCP_Server_Info *server)
789 return cpu_to_le64(server->ops->get_next_mid(server));
793 get_next_mid(struct TCP_Server_Info *server)
795 __u16 mid = server->ops->get_next_mid(server);
797 * The value in the SMB header should be little endian for easy
798 * on-the-wire decoding.
800 return cpu_to_le16(mid);
804 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
806 if (server->ops->revert_current_mid)
807 server->ops->revert_current_mid(server, val);
811 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
812 const struct smb2_hdr *shdr)
814 unsigned int num = le16_to_cpu(shdr->CreditCharge);
816 return revert_current_mid(server, num > 0 ? num : 1);
820 get_mid(const struct smb_hdr *smb)
822 return le16_to_cpu(smb->Mid);
826 compare_mid(__u16 mid, const struct smb_hdr *smb)
828 return mid == le16_to_cpu(smb->Mid);
832 * When the server supports very large reads and writes via POSIX extensions,
833 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
834 * including the RFC1001 length.
836 * Note that this might make for "interesting" allocation problems during
837 * writeback however as we have to allocate an array of pointers for the
838 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
840 * For reads, there is a similar problem as we need to allocate an array
841 * of kvecs to handle the receive, though that should only need to be done
844 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
845 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
848 * When the server doesn't allow large posix writes, only allow a rsize/wsize
849 * of 2^17-1 minus the size of the call header. That allows for a read or
850 * write up to the maximum size described by RFC1002.
852 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
853 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
856 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
857 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
858 * a single wsize request with a single call.
860 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
861 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
864 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
865 * those values when posix extensions aren't in force. In actuality here, we
866 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
867 * to be ok with the extra byte even though Windows doesn't send writes that
872 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
874 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
875 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
878 * Macros to allow the TCP_Server_Info->net field and related code to drop out
879 * when CONFIG_NET_NS isn't set.
884 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
889 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
896 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
901 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
907 struct cifs_server_iface {
909 unsigned int rdma_capable : 1;
910 unsigned int rss_capable : 1;
911 struct sockaddr_storage sockaddr;
915 struct TCP_Server_Info *server;
916 __u8 signkey[SMB3_SIGN_KEY_SIZE];
920 * Session structure. One of these for each uid session with a particular host
923 struct list_head smb_ses_list;
924 struct list_head rlist; /* reconnect list */
925 struct list_head tcon_list;
926 struct cifs_tcon *tcon_ipc;
927 struct mutex session_mutex;
928 struct TCP_Server_Info *server; /* pointer to server info */
929 int ses_count; /* reference counter */
930 enum statusEnum status; /* updates protected by cifs_tcp_ses_lock */
931 unsigned overrideSecFlg; /* if non-zero override global sec flags */
932 char *serverOS; /* name of operating system underlying server */
933 char *serverNOS; /* name of network operating system of server */
934 char *serverDomain; /* security realm of server */
935 __u64 Suid; /* remote smb uid */
936 kuid_t linux_uid; /* overriding owner of files on the mount */
937 kuid_t cred_uid; /* owner of credentials */
938 unsigned int capabilities;
939 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
940 char *user_name; /* must not be null except during init of sess
941 and after mount option parsing we fill it */
944 char *workstation_name;
945 struct session_key auth_key;
946 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
947 enum securityEnum sectype; /* what security flavor was specified? */
948 bool sign; /* is signing required? */
951 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
952 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
953 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
954 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
957 * Network interfaces available on the server this session is
960 * Other channels can be opened by connecting and binding this
961 * session to interfaces from this list.
963 * iface_lock should be taken when accessing any of these fields
965 spinlock_t iface_lock;
966 /* ========= begin: protected by iface_lock ======== */
967 struct cifs_server_iface *iface_list;
969 unsigned long iface_last_update; /* jiffies */
970 /* ========= end: protected by iface_lock ======== */
972 spinlock_t chan_lock;
973 /* ========= begin: protected by chan_lock ======== */
974 #define CIFS_MAX_CHANNELS 16
975 #define CIFS_ALL_CHANNELS_SET(ses) \
976 ((1UL << (ses)->chan_count) - 1)
977 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
978 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
979 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
980 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
981 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
982 test_bit((index), &(ses)->chans_need_reconnect)
984 struct cifs_chan chans[CIFS_MAX_CHANNELS];
987 atomic_t chan_seq; /* round robin state */
990 * chans_need_reconnect is a bitmap indicating which of the channels
991 * under this smb session needs to be reconnected.
992 * If not multichannel session, only one bit will be used.
994 * We will ask for sess and tcon reconnection only if all the
995 * channels are marked for needing reconnection. This will
996 * enable the sessions on top to continue to live till any
997 * of the channels below are active.
999 unsigned long chans_need_reconnect;
1000 /* ========= end: protected by chan_lock ======== */
1004 cap_unix(struct cifs_ses *ses)
1006 return ses->server->vals->cap_unix & ses->capabilities;
1010 bool is_valid:1; /* Do we have a useable root fid */
1011 bool file_all_info_is_valid:1;
1013 unsigned long time; /* jiffies of when lease was taken */
1014 struct kref refcount;
1015 struct cifs_fid *fid;
1016 struct mutex fid_mutex;
1017 struct cifs_tcon *tcon;
1018 struct dentry *dentry;
1019 struct work_struct lease_break;
1020 struct smb2_file_all_info file_all_info;
1024 * there is one of these for each connection to a resource on a particular
1028 struct list_head tcon_list;
1030 struct list_head rlist; /* reconnect list */
1031 atomic_t num_local_opens; /* num of all opens including disconnected */
1032 atomic_t num_remote_opens; /* num of all network opens on server */
1033 struct list_head openFileList;
1034 spinlock_t open_file_lock; /* protects list above */
1035 struct cifs_ses *ses; /* pointer to session associated with */
1036 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1037 char *nativeFileSystem;
1038 char *password; /* for share-level security */
1039 __u32 tid; /* The 4 byte tree id */
1040 __u16 Flags; /* optional support bits */
1041 enum statusEnum tidStatus;
1042 atomic_t num_smbs_sent;
1045 atomic_t num_writes;
1047 atomic_t num_flushes;
1048 atomic_t num_oplock_brks;
1050 atomic_t num_closes;
1051 atomic_t num_deletes;
1052 atomic_t num_mkdirs;
1053 atomic_t num_posixopens;
1054 atomic_t num_posixmkdirs;
1055 atomic_t num_rmdirs;
1056 atomic_t num_renames;
1057 atomic_t num_t2renames;
1058 atomic_t num_ffirst;
1060 atomic_t num_fclose;
1061 atomic_t num_hardlinks;
1062 atomic_t num_symlinks;
1064 atomic_t num_acl_get;
1065 atomic_t num_acl_set;
1068 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1069 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1073 __u64 bytes_written;
1074 spinlock_t stat_lock; /* protects the two fields above */
1075 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1076 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1077 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1078 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1079 bool pipe:1; /* set if connection to pipe share */
1080 bool print:1; /* set if connection to printer share */
1083 bool nohandlecache:1; /* if strange server resource prob can turn off */
1085 bool seal:1; /* transport encryption for this mounted share */
1086 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1087 for this mount even if server would support */
1088 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1089 bool local_lease:1; /* check leases (only) on local system not remote */
1090 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1091 bool broken_sparse_sup; /* if server or share does not support sparse */
1092 bool need_reconnect:1; /* connection reset, tid now invalid */
1093 bool need_reopen_files:1; /* need to reopen tcon file handles */
1094 bool use_resilient:1; /* use resilient instead of durable handles */
1095 bool use_persistent:1; /* use persistent instead of durable handles */
1096 bool no_lease:1; /* Do not request leases on files or directories */
1097 bool use_witness:1; /* use witness protocol */
1098 __le32 capabilities;
1100 __u32 maximal_access;
1101 __u32 vol_serial_number;
1102 __le64 vol_create_time;
1103 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1104 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1105 __u32 ss_flags; /* sector size flags */
1106 __u32 perf_sector_size; /* best sector size for perf */
1108 __u32 max_bytes_chunk;
1109 __u32 max_bytes_copy;
1110 #ifdef CONFIG_CIFS_FSCACHE
1111 u64 resource_id; /* server resource id */
1112 struct fscache_volume *fscache; /* cookie for share */
1114 struct list_head pending_opens; /* list of incomplete opens */
1115 struct cached_fid crfid; /* Cached root fid */
1116 /* BB add field for back pointer to sb struct(s)? */
1117 #ifdef CONFIG_CIFS_DFS_UPCALL
1118 struct list_head ulist; /* cache update list */
1123 * This is a refcounted and timestamped container for a tcon pointer. The
1124 * container holds a tcon reference. It is considered safe to free one of
1125 * these when the tl_count goes to 0. The tl_time is the time of the last
1126 * "get" on the container.
1129 struct rb_node tl_rbnode;
1131 unsigned long tl_flags;
1132 #define TCON_LINK_MASTER 0
1133 #define TCON_LINK_PENDING 1
1134 #define TCON_LINK_IN_TREE 2
1135 unsigned long tl_time;
1137 struct cifs_tcon *tl_tcon;
1140 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1141 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1143 static inline struct cifs_tcon *
1144 tlink_tcon(struct tcon_link *tlink)
1146 return tlink->tl_tcon;
1149 static inline struct tcon_link *
1150 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1152 return cifs_sb->master_tlink;
1155 extern void cifs_put_tlink(struct tcon_link *tlink);
1157 static inline struct tcon_link *
1158 cifs_get_tlink(struct tcon_link *tlink)
1160 if (tlink && !IS_ERR(tlink))
1161 atomic_inc(&tlink->tl_count);
1165 /* This function is always expected to succeed */
1166 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1168 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1170 struct cifs_pending_open {
1171 struct list_head olist;
1172 struct tcon_link *tlink;
1177 struct cifs_deferred_close {
1178 struct list_head dlist;
1179 struct tcon_link *tlink;
1181 __u64 persistent_fid;
1186 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1187 * This is used to track byte stream locks on the file
1189 struct cifsLockInfo {
1190 struct list_head llist; /* pointer to next cifsLockInfo */
1191 struct list_head blist; /* pointer to locks blocked on this */
1192 wait_queue_head_t block_q;
1201 * One of these for each open instance of a file
1203 struct cifs_search_info {
1204 loff_t index_of_last_entry;
1205 __u16 entries_in_buffer;
1208 char *ntwrk_buf_start;
1209 char *srch_entries_start;
1211 const char *presume_name;
1212 unsigned int resume_name_len;
1216 bool smallBuf:1; /* so we know which buf_release function to call */
1219 #define ACL_NO_MODE ((umode_t)(-1))
1220 struct cifs_open_parms {
1221 struct cifs_tcon *tcon;
1222 struct cifs_sb_info *cifs_sb;
1227 struct cifs_fid *fid;
1234 __u64 persistent_fid; /* persist file id for smb2 */
1235 __u64 volatile_fid; /* volatile file id for smb2 */
1236 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1237 __u8 create_guid[16];
1239 struct cifs_pending_open *pending_open;
1241 #ifdef CONFIG_CIFS_DEBUG2
1243 #endif /* CIFS_DEBUG2 */
1247 struct cifs_fid_locks {
1248 struct list_head llist;
1249 struct cifsFileInfo *cfile; /* fid that owns locks */
1250 struct list_head locks; /* locks held by fid above */
1253 struct cifsFileInfo {
1254 /* following two lists are protected by tcon->open_file_lock */
1255 struct list_head tlist; /* pointer to next fid owned by tcon */
1256 struct list_head flist; /* next fid (file instance) for this inode */
1257 /* lock list below protected by cifsi->lock_sem */
1258 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1259 kuid_t uid; /* allows finding which FileInfo structure */
1260 __u32 pid; /* process id who opened file */
1261 struct cifs_fid fid; /* file id from remote */
1262 struct list_head rlist; /* reconnect list */
1263 /* BB add lock scope info here if needed */ ;
1264 /* lock scope id (0 if none) */
1265 struct dentry *dentry;
1266 struct tcon_link *tlink;
1267 unsigned int f_flags;
1268 bool invalidHandle:1; /* file closed via session abend */
1270 bool oplock_break_cancelled:1;
1271 unsigned int oplock_epoch; /* epoch from the lease break */
1272 __u32 oplock_level; /* oplock/lease level from the lease break */
1274 spinlock_t file_info_lock; /* protects four flag/count fields above */
1275 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1276 struct cifs_search_info srch_inf;
1277 struct work_struct oplock_break; /* work for oplock breaks */
1278 struct work_struct put; /* work for the final part of _put */
1279 struct delayed_work deferred;
1280 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1283 struct cifs_io_parms {
1285 __u64 persistent_fid; /* persist file id for smb2 */
1286 __u64 volatile_fid; /* volatile file id for smb2 */
1289 unsigned int length;
1290 struct cifs_tcon *tcon;
1291 struct TCP_Server_Info *server;
1294 struct cifs_aio_ctx {
1295 struct kref refcount;
1296 struct list_head list;
1297 struct mutex aio_mutex;
1298 struct completion done;
1299 struct iov_iter iter;
1301 struct cifsFileInfo *cfile;
1304 unsigned int npages;
1307 unsigned int total_len;
1310 * Indicates if this aio_ctx is for direct_io,
1311 * If yes, iter is a copy of the user passed iov_iter
1316 /* asynchronous read support */
1317 struct cifs_readdata {
1318 struct kref refcount;
1319 struct list_head list;
1320 struct completion done;
1321 struct cifsFileInfo *cfile;
1322 struct address_space *mapping;
1323 struct cifs_aio_ctx *ctx;
1326 unsigned int got_bytes;
1329 struct work_struct work;
1330 int (*read_into_pages)(struct TCP_Server_Info *server,
1331 struct cifs_readdata *rdata,
1333 int (*copy_into_pages)(struct TCP_Server_Info *server,
1334 struct cifs_readdata *rdata,
1335 struct iov_iter *iter);
1337 struct TCP_Server_Info *server;
1338 #ifdef CONFIG_CIFS_SMB_DIRECT
1341 unsigned int pagesz;
1342 unsigned int page_offset;
1343 unsigned int tailsz;
1344 struct cifs_credits credits;
1345 unsigned int nr_pages;
1346 struct page **pages;
1349 /* asynchronous write support */
1350 struct cifs_writedata {
1351 struct kref refcount;
1352 struct list_head list;
1353 struct completion done;
1354 enum writeback_sync_modes sync_mode;
1355 struct work_struct work;
1356 struct cifsFileInfo *cfile;
1357 struct cifs_aio_ctx *ctx;
1362 struct TCP_Server_Info *server;
1363 #ifdef CONFIG_CIFS_SMB_DIRECT
1366 unsigned int pagesz;
1367 unsigned int page_offset;
1368 unsigned int tailsz;
1369 struct cifs_credits credits;
1370 unsigned int nr_pages;
1371 struct page **pages;
1375 * Take a reference on the file private data. Must be called with
1376 * cfile->file_info_lock held.
1379 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1384 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1385 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1387 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1389 #define CIFS_CACHE_READ_FLG 1
1390 #define CIFS_CACHE_HANDLE_FLG 2
1391 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1392 #define CIFS_CACHE_WRITE_FLG 4
1393 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1394 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1396 #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))
1397 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1398 #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))
1401 * One of these for each file inode
1404 struct cifsInodeInfo {
1405 bool can_cache_brlcks;
1406 struct list_head llist; /* locks helb by this inode */
1408 * NOTE: Some code paths call down_read(lock_sem) twice, so
1409 * we must always use cifs_down_write() instead of down_write()
1410 * for this semaphore to avoid deadlocks.
1412 struct rw_semaphore lock_sem; /* protect the fields above */
1413 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1414 struct list_head openFileList;
1415 spinlock_t open_file_lock; /* protects openFileList */
1416 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1417 unsigned int oplock; /* oplock/lease level we have */
1418 unsigned int epoch; /* used to track lease state changes */
1419 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1420 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1421 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1422 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1423 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1424 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1425 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1426 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1427 unsigned long flags;
1428 spinlock_t writers_lock;
1429 unsigned int writers; /* Number of writers on this inode */
1430 unsigned long time; /* jiffies of last update of inode */
1431 u64 server_eof; /* current file size on server -- protected by i_lock */
1432 u64 uniqueid; /* server inode number */
1433 u64 createtime; /* creation time on server */
1434 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1435 #ifdef CONFIG_CIFS_FSCACHE
1436 struct fscache_cookie *fscache;
1438 struct inode vfs_inode;
1439 struct list_head deferred_closes; /* list of deferred closes */
1440 spinlock_t deferred_lock; /* protection on deferred list */
1441 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1444 static inline struct cifsInodeInfo *
1445 CIFS_I(struct inode *inode)
1447 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1450 static inline struct cifs_sb_info *
1451 CIFS_SB(struct super_block *sb)
1453 return sb->s_fs_info;
1456 static inline struct cifs_sb_info *
1457 CIFS_FILE_SB(struct file *file)
1459 return CIFS_SB(file_inode(file)->i_sb);
1462 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1471 convert_delimiter(char *path, char delim)
1473 char old_delim, *pos;
1481 while ((pos = strchr(pos, old_delim)))
1485 #define cifs_stats_inc atomic_inc
1487 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1491 spin_lock(&tcon->stat_lock);
1492 tcon->bytes_written += bytes;
1493 spin_unlock(&tcon->stat_lock);
1497 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1500 spin_lock(&tcon->stat_lock);
1501 tcon->bytes_read += bytes;
1502 spin_unlock(&tcon->stat_lock);
1507 * This is the prototype for the mid receive function. This function is for
1508 * receiving the rest of the SMB frame, starting with the WordCount (which is
1509 * just after the MID in struct smb_hdr). Note:
1511 * - This will be called by cifsd, with no locks held.
1512 * - The mid will still be on the pending_mid_q.
1513 * - mid->resp_buf will point to the current buffer.
1515 * Returns zero on a successful receive, or an error. The receive state in
1516 * the TCP_Server_Info will also be updated.
1518 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1519 struct mid_q_entry *mid);
1522 * This is the prototype for the mid callback function. This is called once the
1523 * mid has been received off of the socket. When creating one, take special
1524 * care to avoid deadlocks. Things to bear in mind:
1526 * - it will be called by cifsd, with no locks held
1527 * - the mid will be removed from any lists
1529 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1532 * This is the protopyte for mid handle function. This is called once the mid
1533 * has been recognized after decryption of the message.
1535 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1536 struct mid_q_entry *mid);
1538 /* one of these for every pending CIFS request to the server */
1539 struct mid_q_entry {
1540 struct list_head qhead; /* mids waiting on reply from this server */
1541 struct kref refcount;
1542 struct TCP_Server_Info *server; /* server corresponding to this mid */
1543 __u64 mid; /* multiplex id */
1544 __u16 credits; /* number of credits consumed by this mid */
1545 __u16 credits_received; /* number of credits from the response */
1546 __u32 pid; /* process id */
1547 __u32 sequence_number; /* for CIFS signing */
1548 unsigned long when_alloc; /* when mid was created */
1549 #ifdef CONFIG_CIFS_STATS2
1550 unsigned long when_sent; /* time when smb send finished */
1551 unsigned long when_received; /* when demux complete (taken off wire) */
1553 mid_receive_t *receive; /* call receive callback */
1554 mid_callback_t *callback; /* call completion callback */
1555 mid_handle_t *handle; /* call handle mid callback */
1556 void *callback_data; /* general purpose pointer for callback */
1557 struct task_struct *creator;
1558 void *resp_buf; /* pointer to received SMB header */
1559 unsigned int resp_buf_size;
1560 int mid_state; /* wish this were enum but can not pass to wait_event */
1561 unsigned int mid_flags;
1562 __le16 command; /* smb command code */
1563 unsigned int optype; /* operation type */
1564 bool large_buf:1; /* if valid response, is pointer to large buf */
1565 bool multiRsp:1; /* multiple trans2 responses for one request */
1566 bool multiEnd:1; /* both received */
1567 bool decrypted:1; /* decrypted entry */
1570 struct close_cancelled_open {
1571 struct cifs_fid fid;
1572 struct cifs_tcon *tcon;
1573 struct work_struct work;
1578 /* Make code in transport.c a little cleaner by moving
1579 update of optional stats into function below */
1580 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1582 atomic_inc(&server->in_send);
1585 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1587 atomic_dec(&server->in_send);
1590 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1592 atomic_inc(&server->num_waiters);
1595 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1597 atomic_dec(&server->num_waiters);
1600 #ifdef CONFIG_CIFS_STATS2
1601 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1603 mid->when_sent = jiffies;
1606 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1611 /* for pending dnotify requests */
1612 struct dir_notify_req {
1613 struct list_head lhead;
1620 __u32 filter; /* CompletionFilter (for multishot) */
1625 struct dfs_info3_param {
1626 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1636 struct list_head list;
1637 struct cifsFileInfo *cfile;
1641 * common struct for holding inode info when searching for or updating an
1642 * inode with new info
1645 #define CIFS_FATTR_DFS_REFERRAL 0x1
1646 #define CIFS_FATTR_DELETE_PENDING 0x2
1647 #define CIFS_FATTR_NEED_REVAL 0x4
1648 #define CIFS_FATTR_INO_COLLISION 0x8
1649 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1650 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1663 unsigned int cf_nlink;
1664 unsigned int cf_dtype;
1665 struct timespec64 cf_atime;
1666 struct timespec64 cf_mtime;
1667 struct timespec64 cf_ctime;
1671 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1674 kfree(param->path_name);
1675 kfree(param->node_name);
1679 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1680 int number_of_items)
1683 if ((number_of_items == 0) || (param == NULL))
1685 for (i = 0; i < number_of_items; i++) {
1686 kfree(param[i].path_name);
1687 kfree(param[i].node_name);
1692 static inline bool is_interrupt_error(int error)
1697 case -ERESTARTNOHAND:
1698 case -ERESTARTNOINTR:
1704 static inline bool is_retryable_error(int error)
1706 if (is_interrupt_error(error) || error == -EAGAIN)
1712 /* cifs_get_writable_file() flags */
1713 #define FIND_WR_ANY 0
1714 #define FIND_WR_FSUID_ONLY 1
1715 #define FIND_WR_WITH_DELETE 2
1718 #define MID_REQUEST_ALLOCATED 1
1719 #define MID_REQUEST_SUBMITTED 2
1720 #define MID_RESPONSE_RECEIVED 4
1721 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1722 #define MID_RESPONSE_MALFORMED 0x10
1723 #define MID_SHUTDOWN 0x20
1726 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1727 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1729 /* Types of response buffer returned from SendReceive2 */
1730 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1731 #define CIFS_SMALL_BUFFER 1
1732 #define CIFS_LARGE_BUFFER 2
1733 #define CIFS_IOVEC 4 /* array of response buffers */
1735 /* Type of Request to SendReceive2 */
1736 #define CIFS_BLOCKING_OP 1 /* operation can block */
1737 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1738 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1739 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1740 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1741 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1743 /* Type of request operation */
1744 #define CIFS_ECHO_OP 0x080 /* echo request */
1745 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1746 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1747 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1748 /* Lower bitmask values are reserved by others below. */
1749 #define CIFS_SESS_OP 0x2000 /* session setup request */
1750 #define CIFS_OP_MASK 0x2780 /* mask request type */
1752 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1753 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1754 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1756 /* Security Flags: indicate type of session setup needed */
1757 #define CIFSSEC_MAY_SIGN 0x00001
1758 #define CIFSSEC_MAY_NTLMV2 0x00004
1759 #define CIFSSEC_MAY_KRB5 0x00008
1760 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1761 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1763 #define CIFSSEC_MUST_SIGN 0x01001
1764 /* note that only one of the following can be set so the
1765 result of setting MUST flags more than once will be to
1766 require use of the stronger protocol */
1767 #define CIFSSEC_MUST_NTLMV2 0x04004
1768 #define CIFSSEC_MUST_KRB5 0x08008
1769 #ifdef CONFIG_CIFS_UPCALL
1770 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1772 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1774 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1775 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1777 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1778 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1779 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1781 *****************************************************************
1782 * All constants go here
1783 *****************************************************************
1786 #define UID_HASH (16)
1789 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1790 * following to be declared.
1793 /****************************************************************************
1794 * Locking notes. All updates to global variables and lists should be
1795 * protected by spinlocks or semaphores.
1799 * GlobalMid_Lock protects:
1800 * list operations on pending_mid_q and oplockQ
1801 * updates to XID counters, multiplex id and SMB sequence numbers
1802 * list operations on global DnotifyReqList
1803 * updates to ses->status and TCP_Server_Info->tcpStatus
1804 * updates to server->CurrentMid
1805 * tcp_ses_lock protects:
1806 * list operations on tcp and SMB session lists
1807 * tcon->open_file_lock protects the list of open files hanging off the tcon
1808 * inode->open_file_lock protects the openFileList hanging off the inode
1809 * cfile->file_info_lock protects counters and fields in cifs file struct
1810 * f_owner.lock protects certain per file struct operations
1811 * mapping->page_lock protects certain per page operations
1813 * Note that the cifs_tcon.open_file_lock should be taken before
1814 * not after the cifsInodeInfo.open_file_lock
1818 * cifsInodeInfo->lock_sem protects:
1819 * the list of locks held by the inode
1821 ****************************************************************************/
1823 #ifdef DECLARE_GLOBALS_HERE
1824 #define GLOBAL_EXTERN
1826 #define GLOBAL_EXTERN extern
1830 * the list of TCP_Server_Info structures, ie each of the sockets
1831 * connecting our client to a distinct server (ip address), is
1832 * chained together by cifs_tcp_ses_list. The list of all our SMB
1833 * sessions (and from that the tree connections) can be found
1834 * by iterating over cifs_tcp_ses_list
1836 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1839 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1840 * tcp session, and the list of tcon's per smb session. It also protects
1841 * the reference counters for the server, smb session, and tcon. It also
1842 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1843 * changes to the tcon->tidStatus should be done while holding this lock.
1844 * generally the locks should be taken in order tcp_ses_lock before
1845 * tcon->open_file_lock and that before file->file_info_lock since the
1846 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1848 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1851 * Global transaction id (XID) information
1853 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1854 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1855 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1856 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1857 /* on midQ entries */
1859 * Global counters, updated atomically
1861 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1862 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1863 GLOBAL_EXTERN atomic_t tcpSesNextId;
1864 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1865 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1866 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1868 /* Various Debug counters */
1869 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1870 #ifdef CONFIG_CIFS_STATS2
1871 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1872 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1873 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1875 GLOBAL_EXTERN atomic_t smBufAllocCount;
1876 GLOBAL_EXTERN atomic_t midCount;
1879 extern bool enable_oplocks; /* enable or disable oplocks */
1880 extern bool lookupCacheEnabled;
1881 extern unsigned int global_secflags; /* if on, session setup sent
1882 with more secure ntlmssp2 challenge/resp */
1883 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1884 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1885 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1886 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1887 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1888 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1889 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1890 extern unsigned int cifs_min_small; /* min size of small buf pool */
1891 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1892 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1894 void cifs_oplock_break(struct work_struct *work);
1895 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1896 void smb2_deferred_work_close(struct work_struct *work);
1898 extern const struct slow_work_ops cifs_oplock_break_ops;
1899 extern struct workqueue_struct *cifsiod_wq;
1900 extern struct workqueue_struct *decrypt_wq;
1901 extern struct workqueue_struct *fileinfo_put_wq;
1902 extern struct workqueue_struct *cifsoplockd_wq;
1903 extern struct workqueue_struct *deferredclose_wq;
1904 extern __u32 cifs_lock_secret;
1906 extern mempool_t *cifs_mid_poolp;
1908 /* Operations for different SMB versions */
1909 #define SMB1_VERSION_STRING "1.0"
1910 extern struct smb_version_operations smb1_operations;
1911 extern struct smb_version_values smb1_values;
1912 #define SMB20_VERSION_STRING "2.0"
1913 extern struct smb_version_operations smb20_operations;
1914 extern struct smb_version_values smb20_values;
1915 #define SMB21_VERSION_STRING "2.1"
1916 extern struct smb_version_operations smb21_operations;
1917 extern struct smb_version_values smb21_values;
1918 #define SMBDEFAULT_VERSION_STRING "default"
1919 extern struct smb_version_values smbdefault_values;
1920 #define SMB3ANY_VERSION_STRING "3"
1921 extern struct smb_version_values smb3any_values;
1922 #define SMB30_VERSION_STRING "3.0"
1923 extern struct smb_version_operations smb30_operations;
1924 extern struct smb_version_values smb30_values;
1925 #define SMB302_VERSION_STRING "3.02"
1926 #define ALT_SMB302_VERSION_STRING "3.0.2"
1927 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1928 extern struct smb_version_values smb302_values;
1929 #define SMB311_VERSION_STRING "3.1.1"
1930 #define ALT_SMB311_VERSION_STRING "3.11"
1931 extern struct smb_version_operations smb311_operations;
1932 extern struct smb_version_values smb311_values;
1934 static inline char *get_security_type_str(enum securityEnum sectype)
1938 return "RawNTLMSSP";
1948 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1950 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
1953 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
1956 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
1957 * Subsystem Notifies That a Share Is a DFS Share.
1959 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
1960 * Application Updates a Share.
1962 if (!tcon || !tcon->ses || !tcon->ses->server)
1964 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
1965 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
1968 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
1969 const struct dfs_info3_param *ref)
1972 * Check if all targets are capable of handling DFS referrals as per
1973 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
1975 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
1978 #endif /* _CIFS_GLOB_H */