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 CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
29 #define SMB_PATH_MAX 260
31 #define RFC1001_PORT 139
34 * The sizes of various internal tables and strings
36 #define MAX_UID_INFO 16
37 #define MAX_SES_INFO 2
38 #define MAX_TCON_INFO 4
40 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
42 #define CIFS_MIN_RCV_POOL 4
44 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
46 * default attribute cache timeout (jiffies)
48 #define CIFS_DEF_ACTIMEO (1 * HZ)
51 * max attribute cache timeout (jiffies) - 2^30
53 #define CIFS_MAX_ACTIMEO (1 << 30)
56 * Max persistent and resilient handle timeout (milliseconds).
57 * Windows durable max was 960000 (16 minutes)
59 #define SMB3_MAX_HANDLE_TIMEOUT 960000
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* maximum length of ip addr as a string (including ipv6 and sctp) */
71 #define SERVER_NAME_LENGTH 80
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* echo interval in seconds */
75 #define SMB_ECHO_INTERVAL_MIN 1
76 #define SMB_ECHO_INTERVAL_MAX 600
77 #define SMB_ECHO_INTERVAL_DEFAULT 60
79 /* dns resolution intervals in seconds */
80 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
81 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
83 /* maximum number of PDUs in one compound */
84 #define MAX_COMPOUND 5
87 * Default number of credits to keep available for SMB3.
88 * This value is chosen somewhat arbitrarily. The Windows client
89 * defaults to 128 credits, the Windows server allows clients up to
90 * 512 credits (or 8K for later versions), and the NetApp server
91 * does not limit clients at all. Choose a high enough default value
92 * such that the client shouldn't limit performance, but allow mount
93 * to override (until you approach 64K, where we limit credits to 65000
94 * to reduce possibility of seeing more server credit overflow bugs.
96 #define SMB2_MAX_CREDITS_AVAILABLE 32000
100 #ifndef XATTR_DOS_ATTRIB
101 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
104 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
107 * CIFS vfs client Status information (based on what we know.)
110 /* associated with each tcp and smb session */
120 Unspecified = 0, /* not specified */
121 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
122 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
123 Kerberos, /* Kerberos via SPNEGO */
131 /* crypto security descriptor definition */
133 struct shash_desc shash;
137 /* crypto hashing related structure/fields, not specific to a sec mech */
138 struct cifs_secmech {
139 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
140 struct crypto_shash *md5; /* md5 hash function */
141 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
142 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
143 struct crypto_shash *sha512; /* sha512 hash function */
144 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
145 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
146 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
147 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
148 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
149 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
150 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
153 /* per smb session structure/fields */
154 struct ntlmssp_auth {
155 bool sesskey_per_smbsess; /* whether session key is per smb session */
156 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
157 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
158 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
159 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
167 struct cifs_sid osid;
168 struct cifs_sid gsid;
169 struct cifs_ntace *ntaces;
170 struct cifs_ace *aces;
174 *****************************************************************
175 * Except the CIFS PDUs themselves all the
176 * globally interesting structs should go here
177 *****************************************************************
181 * A smb_rqst represents a complete request to be issued to a server. It's
182 * formed by a kvec array, followed by an array of pages. Page data is assumed
183 * to start at the beginning of the first page.
186 struct kvec *rq_iov; /* array of kvecs */
187 unsigned int rq_nvec; /* number of kvecs in array */
188 struct page **rq_pages; /* pointer to array of page ptrs */
189 unsigned int rq_offset; /* the offset to the 1st page */
190 unsigned int rq_npages; /* number pages in array */
191 unsigned int rq_pagesz; /* page size to use */
192 unsigned int rq_tailsz; /* length of last page */
196 struct TCP_Server_Info;
200 struct dfs_info3_param;
202 struct smb3_fs_context;
204 struct cifs_readdata;
205 struct cifs_writedata;
206 struct cifs_io_parms;
207 struct cifs_search_info;
208 struct cifsInodeInfo;
209 struct cifs_open_parms;
212 struct smb_version_operations {
213 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
214 struct mid_q_entry *);
215 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
216 /* setup request: allocate mid, sign message */
217 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
218 struct TCP_Server_Info *,
220 /* setup async request: allocate mid, sign message */
221 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
223 /* check response: verify signature, map error */
224 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
226 void (*add_credits)(struct TCP_Server_Info *server,
227 const struct cifs_credits *credits,
229 void (*set_credits)(struct TCP_Server_Info *, const int);
230 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
231 unsigned int (*get_credits)(struct mid_q_entry *);
232 __u64 (*get_next_mid)(struct TCP_Server_Info *);
233 void (*revert_current_mid)(struct TCP_Server_Info *server,
234 const unsigned int val);
235 /* data offset from read response message */
236 unsigned int (*read_data_offset)(char *);
238 * Data length from read response message
239 * When in_remaining is true, the returned data length is in
240 * message field DataRemaining for out-of-band data read (e.g through
241 * Memory Registration RDMA write in SMBD).
242 * Otherwise, the returned data length is in message field DataLength.
244 unsigned int (*read_data_length)(char *, bool in_remaining);
245 /* map smb to linux error */
246 int (*map_error)(char *, bool);
247 /* find mid corresponding to the response message */
248 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
249 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
250 void (*clear_stats)(struct cifs_tcon *);
251 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
252 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
253 /* verify the message */
254 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
255 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
256 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
257 void (*downgrade_oplock)(struct TCP_Server_Info *server,
258 struct cifsInodeInfo *cinode, __u32 oplock,
259 unsigned int epoch, bool *purge_cache);
260 /* process transaction2 response */
261 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
263 /* check if we need to negotiate */
264 bool (*need_neg)(struct TCP_Server_Info *);
265 /* negotiate to the server */
266 int (*negotiate)(const unsigned int xid,
267 struct cifs_ses *ses,
268 struct TCP_Server_Info *server);
269 /* set negotiated write size */
270 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
271 /* set negotiated read size */
272 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
273 /* setup smb sessionn */
274 int (*sess_setup)(const unsigned int, struct cifs_ses *,
275 struct TCP_Server_Info *server,
276 const struct nls_table *);
277 /* close smb session */
278 int (*logoff)(const unsigned int, struct cifs_ses *);
279 /* connect to a server share */
280 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
281 struct cifs_tcon *, const struct nls_table *);
282 /* close tree connecion */
283 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
284 /* get DFS referrals */
285 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
286 const char *, struct dfs_info3_param **,
287 unsigned int *, const struct nls_table *, int);
288 /* informational QFS call */
289 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
290 struct cifs_sb_info *);
291 /* check if a path is accessible or not */
292 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
293 struct cifs_sb_info *, const char *);
294 /* query path data from the server */
295 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
296 struct cifs_sb_info *, const char *,
297 FILE_ALL_INFO *, bool *, bool *);
298 /* query file data from the server */
299 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
300 struct cifs_fid *, FILE_ALL_INFO *);
301 /* query reparse tag from srv to determine which type of special file */
302 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
303 struct cifs_sb_info *cifs_sb, const char *path,
305 /* get server index number */
306 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
307 struct cifs_sb_info *, const char *,
308 u64 *uniqueid, FILE_ALL_INFO *);
309 /* set size by path */
310 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
311 const char *, __u64, struct cifs_sb_info *, bool);
312 /* set size by file handle */
313 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
314 struct cifsFileInfo *, __u64, bool);
316 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
318 int (*set_compression)(const unsigned int, struct cifs_tcon *,
319 struct cifsFileInfo *);
320 /* check if we can send an echo or nor */
321 bool (*can_echo)(struct TCP_Server_Info *);
322 /* send echo request */
323 int (*echo)(struct TCP_Server_Info *);
324 /* create directory */
325 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
326 umode_t mode, struct cifs_tcon *tcon,
327 const char *full_path,
328 struct cifs_sb_info *cifs_sb);
329 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
330 struct cifs_tcon *tcon, const char *name,
331 struct cifs_sb_info *sb);
332 /* set info on created directory */
333 void (*mkdir_setinfo)(struct inode *, const char *,
334 struct cifs_sb_info *, struct cifs_tcon *,
336 /* remove directory */
337 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
338 struct cifs_sb_info *);
340 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
341 struct cifs_sb_info *);
342 /* open, rename and delete file */
343 int (*rename_pending_delete)(const char *, struct dentry *,
345 /* send rename request */
346 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
347 const char *, struct cifs_sb_info *);
348 /* send create hardlink request */
349 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
350 const char *, const char *,
351 struct cifs_sb_info *);
352 /* query symlink target */
353 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
354 struct cifs_sb_info *, const char *,
356 /* open a file for non-posix mounts */
357 int (*open)(const unsigned int, struct cifs_open_parms *,
358 __u32 *, FILE_ALL_INFO *);
359 /* set fid protocol-specific info */
360 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
362 void (*close)(const unsigned int, struct cifs_tcon *,
364 /* close a file, returning file attributes and timestamps */
365 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
366 struct cifsFileInfo *pfile_info);
367 /* send a flush request to the server */
368 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
369 /* async read from the server */
370 int (*async_readv)(struct cifs_readdata *);
371 /* async write to the server */
372 int (*async_writev)(struct cifs_writedata *,
373 void (*release)(struct kref *));
374 /* sync read from the server */
375 int (*sync_read)(const unsigned int, struct cifs_fid *,
376 struct cifs_io_parms *, unsigned int *, char **,
378 /* sync write to the server */
379 int (*sync_write)(const unsigned int, struct cifs_fid *,
380 struct cifs_io_parms *, unsigned int *, struct kvec *,
382 /* open dir, start readdir */
383 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
384 const char *, struct cifs_sb_info *,
385 struct cifs_fid *, __u16,
386 struct cifs_search_info *);
387 /* continue readdir */
388 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
390 __u16, struct cifs_search_info *srch_inf);
392 int (*close_dir)(const unsigned int, struct cifs_tcon *,
394 /* calculate a size of SMB message */
395 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
396 /* check for STATUS_PENDING and process the response if yes */
397 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
398 /* check for STATUS_NETWORK_SESSION_EXPIRED */
399 bool (*is_session_expired)(char *);
400 /* send oplock break response */
401 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
402 struct cifsInodeInfo *);
403 /* query remote filesystem */
404 int (*queryfs)(const unsigned int, struct cifs_tcon *,
405 struct cifs_sb_info *, struct kstatfs *);
406 /* send mandatory brlock to the server */
407 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
408 __u64, __u32, int, int, bool);
409 /* unlock range of mandatory locks */
410 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
412 /* push brlocks from the cache to the server */
413 int (*push_mand_locks)(struct cifsFileInfo *);
414 /* get lease key of the inode */
415 void (*get_lease_key)(struct inode *, struct cifs_fid *);
416 /* set lease key of the inode */
417 void (*set_lease_key)(struct inode *, struct cifs_fid *);
418 /* generate new lease key */
419 void (*new_lease_key)(struct cifs_fid *);
420 int (*generate_signingkey)(struct cifs_ses *ses,
421 struct TCP_Server_Info *server);
422 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
423 bool allocate_crypto);
424 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
425 struct cifsFileInfo *src_file);
426 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
427 struct cifsFileInfo *src_file, void __user *);
428 int (*notify)(const unsigned int xid, struct file *pfile,
430 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
431 struct cifs_sb_info *, const unsigned char *,
432 char *, unsigned int *);
433 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
434 struct cifs_sb_info *, const unsigned char *,
435 char *, unsigned int *);
436 /* if we can do cache read operations */
437 bool (*is_read_op)(__u32);
438 /* set oplock level for the inode */
439 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
441 /* create lease context buffer for CREATE request */
442 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
443 /* parse lease context buffer and return oplock/epoch info */
444 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
445 ssize_t (*copychunk_range)(const unsigned int,
446 struct cifsFileInfo *src_file,
447 struct cifsFileInfo *target_file,
448 u64 src_off, u64 len, u64 dest_off);
449 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
450 struct cifsFileInfo *target_file, u64 src_off, u64 len,
452 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
453 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
454 const unsigned char *, const unsigned char *, char *,
455 size_t, struct cifs_sb_info *);
456 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
457 const char *, const void *, const __u16,
458 const struct nls_table *, struct cifs_sb_info *);
459 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
460 const char *, u32 *, u32);
461 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
462 const struct cifs_fid *, u32 *, u32);
463 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
465 /* writepages retry size */
466 unsigned int (*wp_retry_size)(struct inode *);
467 /* get mtu credits */
468 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
469 unsigned int *, struct cifs_credits *);
470 /* adjust previously taken mtu credits to request size */
471 int (*adjust_credits)(struct TCP_Server_Info *server,
472 struct cifs_credits *credits,
473 const unsigned int payload_size);
474 /* check if we need to issue closedir */
475 bool (*dir_needs_close)(struct cifsFileInfo *);
476 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
478 /* init transform request - used for encryption for now */
479 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
480 struct smb_rqst *, struct smb_rqst *);
481 int (*is_transform_hdr)(void *buf);
482 int (*receive_transform)(struct TCP_Server_Info *,
483 struct mid_q_entry **, char **, int *);
484 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
486 int (*next_header)(char *);
487 /* ioctl passthrough for query_info */
488 int (*ioctl_query_info)(const unsigned int xid,
489 struct cifs_tcon *tcon,
490 struct cifs_sb_info *cifs_sb,
491 __le16 *path, int is_dir,
493 /* make unix special files (block, char, fifo, socket) */
494 int (*make_node)(unsigned int xid,
496 struct dentry *dentry,
497 struct cifs_tcon *tcon,
498 const char *full_path,
500 dev_t device_number);
501 /* version specific fiemap implementation */
502 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
503 struct fiemap_extent_info *, u64, u64);
504 /* version specific llseek implementation */
505 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
506 /* Check for STATUS_IO_TIMEOUT */
507 bool (*is_status_io_timeout)(char *buf);
508 /* Check for STATUS_NETWORK_NAME_DELETED */
509 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
512 struct smb_version_values {
513 char *version_string;
515 __u32 req_capabilities;
516 __u32 large_lock_type;
517 __u32 exclusive_lock_type;
518 __u32 shared_lock_type;
519 __u32 unlock_lock_type;
520 size_t header_preamble_size;
522 size_t max_header_size;
523 size_t read_rsp_size;
525 unsigned int cap_unix;
526 unsigned int cap_nt_find;
527 unsigned int cap_large_files;
528 __u16 signing_enabled;
529 __u16 signing_required;
530 size_t create_lease_size;
533 #define HEADER_SIZE(server) (server->vals->header_size)
534 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
537 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
538 * trying to reuse existing superblock for a new mount
540 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
541 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
542 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
543 CIFS_MOUNT_MAP_SFM_CHR | \
544 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
545 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
546 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
547 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
548 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
549 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
550 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
551 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
552 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
553 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
556 * Generic VFS superblock mount flags (s_flags) to consider when
557 * trying to reuse existing superblock for a new mount
559 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
560 SB_NODEV | SB_SYNCHRONOUS)
562 struct cifs_mnt_data {
563 struct cifs_sb_info *cifs_sb;
564 struct smb3_fs_context *ctx;
568 static inline unsigned int
569 get_rfc1002_length(void *buf)
571 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
575 inc_rfc1001_len(void *buf, int count)
577 be32_add_cpu((__be32 *)buf, count);
580 struct TCP_Server_Info {
581 struct list_head tcp_ses_list;
582 struct list_head smb_ses_list;
583 __u64 conn_id; /* connection identifier (useful for debugging) */
584 int srv_count; /* reference counter */
585 /* 15 character server name + 0x20 16th byte indicating type = srv */
586 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
587 struct smb_version_operations *ops;
588 struct smb_version_values *vals;
589 /* updates to tcpStatus protected by GlobalMid_Lock */
590 enum statusEnum tcpStatus; /* what we think the status is */
591 char *hostname; /* hostname portion of UNC string */
592 struct socket *ssocket;
593 struct sockaddr_storage dstaddr;
594 struct sockaddr_storage srcaddr; /* locally bind to this IP */
598 wait_queue_head_t response_q;
599 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
600 struct list_head pending_mid_q;
601 bool noblocksnd; /* use blocking sendmsg */
602 bool noautotune; /* do not autotune send buf sizes */
605 unsigned int credits; /* send no more requests at once */
606 unsigned int max_credits; /* can override large 32000 default at mnt */
607 unsigned int in_flight; /* number of requests on the wire to server */
608 unsigned int max_in_flight; /* max number of requests that were on wire */
609 spinlock_t req_lock; /* protect the two values above */
610 struct mutex srv_mutex;
611 struct task_struct *tsk;
612 char server_GUID[16];
614 bool sign; /* is signing enabled on this connection? */
615 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
616 bool session_estab; /* mark when very first sess is established */
617 int echo_credits; /* echo reserved slots */
618 int oplock_credits; /* oplock break reserved slots */
619 bool echoes:1; /* enable echoes */
620 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
621 u16 dialect; /* dialect index that server chose */
622 bool oplocks:1; /* enable oplocks */
623 unsigned int maxReq; /* Clients should submit no more */
624 /* than maxReq distinct unanswered SMBs to the server when using */
625 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
626 unsigned int maxBuf; /* maxBuf specifies the maximum */
627 /* message size the server can send or receive for non-raw SMBs */
628 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
629 /* when socket is setup (and during reconnect) before NegProt sent */
630 unsigned int max_rw; /* maxRw specifies the maximum */
631 /* message size the server can send or receive for */
632 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
633 unsigned int capabilities; /* selective disabling of caps by smb sess */
634 int timeAdj; /* Adjust for difference in server time zone in sec */
635 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
636 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
637 /* 16th byte of RFC1001 workstation name is always null */
638 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
639 __u32 sequence_number; /* for signing, protected by srv_mutex */
640 __u32 reconnect_instance; /* incremented on each reconnect */
641 struct session_key session_key;
642 unsigned long lstrp; /* when we got last response from this server */
643 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
644 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
645 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
646 char negflavor; /* NEGOTIATE response flavor */
647 /* extended security flavors that server supports */
648 bool sec_ntlmssp; /* supports NTLMSSP */
649 bool sec_kerberosu2u; /* supports U2U Kerberos */
650 bool sec_kerberos; /* supports plain Kerberos */
651 bool sec_mskerberos; /* supports legacy MS Kerberos */
652 bool large_buf; /* is current buffer large? */
653 /* use SMBD connection instead of socket */
655 /* point to the SMBD connection if RDMA is used instead of socket */
656 struct smbd_connection *smbd_conn;
657 struct delayed_work echo; /* echo ping workqueue job */
658 struct delayed_work resolve; /* dns resolution workqueue job */
659 char *smallbuf; /* pointer to current "small" buffer */
660 char *bigbuf; /* pointer to current "big" buffer */
661 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
662 unsigned int pdu_size;
663 unsigned int total_read; /* total amount of data read in this pass */
664 atomic_t in_send; /* requests trying to send */
665 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
666 #ifdef CONFIG_CIFS_FSCACHE
667 struct fscache_cookie *fscache; /* client index cache cookie */
669 #ifdef CONFIG_CIFS_STATS2
670 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
671 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
672 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
673 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
674 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
676 unsigned int max_read;
677 unsigned int max_write;
678 unsigned int min_offload;
679 __le16 compress_algorithm;
680 __u16 signing_algorithm;
682 /* save initital negprot hash */
683 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
684 bool signing_negotiated; /* true if valid signing context rcvd from server */
685 bool posix_ext_supported;
686 struct delayed_work reconnect; /* reconnect workqueue job */
687 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
688 unsigned long echo_interval;
691 * Number of targets available for reconnect. The more targets
692 * the more tasks have to wait to let the demultiplex thread
696 bool noblockcnt; /* use non-blocking connect() */
699 * If this is a session channel,
700 * primary_server holds the ref-counted
701 * pointer to primary channel connection for the session.
703 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
704 struct TCP_Server_Info *primary_server;
706 #ifdef CONFIG_CIFS_SWN_UPCALL
707 bool use_swn_dstaddr;
708 struct sockaddr_storage swn_dstaddr;
710 #ifdef CONFIG_CIFS_DFS_UPCALL
711 bool is_dfs_conn; /* if a dfs connection */
712 struct mutex refpath_lock; /* protects leaf_fullpath */
714 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
716 * origin_fullpath: first or original referral path
717 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
719 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
720 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
722 * format: \\HOST\SHARE\[OPTIONAL PATH]
724 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
728 struct cifs_credits {
730 unsigned int instance;
733 static inline unsigned int
734 in_flight(struct TCP_Server_Info *server)
737 spin_lock(&server->req_lock);
738 num = server->in_flight;
739 spin_unlock(&server->req_lock);
744 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
747 spin_lock(&server->req_lock);
749 spin_unlock(&server->req_lock);
750 return num >= num_credits;
754 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
757 server->ops->add_credits(server, credits, optype);
761 add_credits_and_wake_if(struct TCP_Server_Info *server,
762 const struct cifs_credits *credits, const int optype)
764 if (credits->value) {
765 server->ops->add_credits(server, credits, optype);
766 wake_up(&server->request_q);
771 set_credits(struct TCP_Server_Info *server, const int val)
773 server->ops->set_credits(server, val);
777 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
778 const unsigned int payload_size)
780 return server->ops->adjust_credits ?
781 server->ops->adjust_credits(server, credits, payload_size) : 0;
785 get_next_mid64(struct TCP_Server_Info *server)
787 return cpu_to_le64(server->ops->get_next_mid(server));
791 get_next_mid(struct TCP_Server_Info *server)
793 __u16 mid = server->ops->get_next_mid(server);
795 * The value in the SMB header should be little endian for easy
796 * on-the-wire decoding.
798 return cpu_to_le16(mid);
802 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
804 if (server->ops->revert_current_mid)
805 server->ops->revert_current_mid(server, val);
809 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
810 const struct smb2_hdr *shdr)
812 unsigned int num = le16_to_cpu(shdr->CreditCharge);
814 return revert_current_mid(server, num > 0 ? num : 1);
818 get_mid(const struct smb_hdr *smb)
820 return le16_to_cpu(smb->Mid);
824 compare_mid(__u16 mid, const struct smb_hdr *smb)
826 return mid == le16_to_cpu(smb->Mid);
830 * When the server supports very large reads and writes via POSIX extensions,
831 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
832 * including the RFC1001 length.
834 * Note that this might make for "interesting" allocation problems during
835 * writeback however as we have to allocate an array of pointers for the
836 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
838 * For reads, there is a similar problem as we need to allocate an array
839 * of kvecs to handle the receive, though that should only need to be done
842 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
843 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
846 * When the server doesn't allow large posix writes, only allow a rsize/wsize
847 * of 2^17-1 minus the size of the call header. That allows for a read or
848 * write up to the maximum size described by RFC1002.
850 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
851 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
854 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
855 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
856 * a single wsize request with a single call.
858 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
859 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
862 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
863 * those values when posix extensions aren't in force. In actuality here, we
864 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
865 * to be ok with the extra byte even though Windows doesn't send writes that
870 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
872 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
873 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
876 * Macros to allow the TCP_Server_Info->net field and related code to drop out
877 * when CONFIG_NET_NS isn't set.
882 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
887 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
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)
905 struct cifs_server_iface {
907 unsigned int rdma_capable : 1;
908 unsigned int rss_capable : 1;
909 struct sockaddr_storage sockaddr;
913 struct TCP_Server_Info *server;
914 __u8 signkey[SMB3_SIGN_KEY_SIZE];
918 * Session structure. One of these for each uid session with a particular host
921 struct list_head smb_ses_list;
922 struct list_head tcon_list;
923 struct cifs_tcon *tcon_ipc;
924 struct mutex session_mutex;
925 struct TCP_Server_Info *server; /* pointer to server info */
926 int ses_count; /* reference counter */
927 enum statusEnum status; /* updates protected by GlobalMid_Lock */
928 unsigned overrideSecFlg; /* if non-zero override global sec flags */
929 char *serverOS; /* name of operating system underlying server */
930 char *serverNOS; /* name of network operating system of server */
931 char *serverDomain; /* security realm of server */
932 __u64 Suid; /* remote smb uid */
933 kuid_t linux_uid; /* overriding owner of files on the mount */
934 kuid_t cred_uid; /* owner of credentials */
935 unsigned int capabilities;
936 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
937 char *user_name; /* must not be null except during init of sess
938 and after mount option parsing we fill it */
941 char *workstation_name;
942 struct session_key auth_key;
943 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
944 enum securityEnum sectype; /* what security flavor was specified? */
945 bool sign; /* is signing required? */
948 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
949 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
950 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
951 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
954 * Network interfaces available on the server this session is
957 * Other channels can be opened by connecting and binding this
958 * session to interfaces from this list.
960 * iface_lock should be taken when accessing any of these fields
962 spinlock_t iface_lock;
963 /* ========= begin: protected by iface_lock ======== */
964 struct cifs_server_iface *iface_list;
966 unsigned long iface_last_update; /* jiffies */
967 /* ========= end: protected by iface_lock ======== */
969 spinlock_t chan_lock;
970 /* ========= begin: protected by chan_lock ======== */
971 #define CIFS_MAX_CHANNELS 16
972 #define CIFS_ALL_CHANNELS_SET(ses) \
973 ((1UL << (ses)->chan_count) - 1)
974 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
975 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
976 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
977 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
978 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
979 test_bit((index), &(ses)->chans_need_reconnect)
981 struct cifs_chan chans[CIFS_MAX_CHANNELS];
984 atomic_t chan_seq; /* round robin state */
987 * chans_need_reconnect is a bitmap indicating which of the channels
988 * under this smb session needs to be reconnected.
989 * If not multichannel session, only one bit will be used.
991 * We will ask for sess and tcon reconnection only if all the
992 * channels are marked for needing reconnection. This will
993 * enable the sessions on top to continue to live till any
994 * of the channels below are active.
996 unsigned long chans_need_reconnect;
997 /* ========= end: protected by chan_lock ======== */
1001 cap_unix(struct cifs_ses *ses)
1003 return ses->server->vals->cap_unix & ses->capabilities;
1007 bool is_valid:1; /* Do we have a useable root fid */
1008 bool file_all_info_is_valid:1;
1010 unsigned long time; /* jiffies of when lease was taken */
1011 struct kref refcount;
1012 struct cifs_fid *fid;
1013 struct mutex fid_mutex;
1014 struct cifs_tcon *tcon;
1015 struct dentry *dentry;
1016 struct work_struct lease_break;
1017 struct smb2_file_all_info file_all_info;
1021 * there is one of these for each connection to a resource on a particular
1025 struct list_head tcon_list;
1027 struct list_head rlist; /* reconnect list */
1028 atomic_t num_local_opens; /* num of all opens including disconnected */
1029 atomic_t num_remote_opens; /* num of all network opens on server */
1030 struct list_head openFileList;
1031 spinlock_t open_file_lock; /* protects list above */
1032 struct cifs_ses *ses; /* pointer to session associated with */
1033 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1034 char *nativeFileSystem;
1035 char *password; /* for share-level security */
1036 __u32 tid; /* The 4 byte tree id */
1037 __u16 Flags; /* optional support bits */
1038 enum statusEnum tidStatus;
1039 atomic_t num_smbs_sent;
1042 atomic_t num_writes;
1044 atomic_t num_flushes;
1045 atomic_t num_oplock_brks;
1047 atomic_t num_closes;
1048 atomic_t num_deletes;
1049 atomic_t num_mkdirs;
1050 atomic_t num_posixopens;
1051 atomic_t num_posixmkdirs;
1052 atomic_t num_rmdirs;
1053 atomic_t num_renames;
1054 atomic_t num_t2renames;
1055 atomic_t num_ffirst;
1057 atomic_t num_fclose;
1058 atomic_t num_hardlinks;
1059 atomic_t num_symlinks;
1061 atomic_t num_acl_get;
1062 atomic_t num_acl_set;
1065 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1066 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1070 __u64 bytes_written;
1071 spinlock_t stat_lock; /* protects the two fields above */
1072 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1073 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1074 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1075 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1076 bool pipe:1; /* set if connection to pipe share */
1077 bool print:1; /* set if connection to printer share */
1080 bool nohandlecache:1; /* if strange server resource prob can turn off */
1082 bool seal:1; /* transport encryption for this mounted share */
1083 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1084 for this mount even if server would support */
1085 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1086 bool local_lease:1; /* check leases (only) on local system not remote */
1087 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1088 bool broken_sparse_sup; /* if server or share does not support sparse */
1089 bool need_reconnect:1; /* connection reset, tid now invalid */
1090 bool need_reopen_files:1; /* need to reopen tcon file handles */
1091 bool use_resilient:1; /* use resilient instead of durable handles */
1092 bool use_persistent:1; /* use persistent instead of durable handles */
1093 bool no_lease:1; /* Do not request leases on files or directories */
1094 bool use_witness:1; /* use witness protocol */
1095 __le32 capabilities;
1097 __u32 maximal_access;
1098 __u32 vol_serial_number;
1099 __le64 vol_create_time;
1100 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1101 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1102 __u32 ss_flags; /* sector size flags */
1103 __u32 perf_sector_size; /* best sector size for perf */
1105 __u32 max_bytes_chunk;
1106 __u32 max_bytes_copy;
1107 #ifdef CONFIG_CIFS_FSCACHE
1108 u64 resource_id; /* server resource id */
1109 struct fscache_cookie *fscache; /* cookie for share */
1111 struct list_head pending_opens; /* list of incomplete opens */
1112 struct cached_fid crfid; /* Cached root fid */
1113 /* BB add field for back pointer to sb struct(s)? */
1114 #ifdef CONFIG_CIFS_DFS_UPCALL
1115 struct list_head ulist; /* cache update list */
1120 * This is a refcounted and timestamped container for a tcon pointer. The
1121 * container holds a tcon reference. It is considered safe to free one of
1122 * these when the tl_count goes to 0. The tl_time is the time of the last
1123 * "get" on the container.
1126 struct rb_node tl_rbnode;
1128 unsigned long tl_flags;
1129 #define TCON_LINK_MASTER 0
1130 #define TCON_LINK_PENDING 1
1131 #define TCON_LINK_IN_TREE 2
1132 unsigned long tl_time;
1134 struct cifs_tcon *tl_tcon;
1137 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1138 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1140 static inline struct cifs_tcon *
1141 tlink_tcon(struct tcon_link *tlink)
1143 return tlink->tl_tcon;
1146 static inline struct tcon_link *
1147 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1149 return cifs_sb->master_tlink;
1152 extern void cifs_put_tlink(struct tcon_link *tlink);
1154 static inline struct tcon_link *
1155 cifs_get_tlink(struct tcon_link *tlink)
1157 if (tlink && !IS_ERR(tlink))
1158 atomic_inc(&tlink->tl_count);
1162 /* This function is always expected to succeed */
1163 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1165 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1167 struct cifs_pending_open {
1168 struct list_head olist;
1169 struct tcon_link *tlink;
1174 struct cifs_deferred_close {
1175 struct list_head dlist;
1176 struct tcon_link *tlink;
1178 __u64 persistent_fid;
1183 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1184 * This is used to track byte stream locks on the file
1186 struct cifsLockInfo {
1187 struct list_head llist; /* pointer to next cifsLockInfo */
1188 struct list_head blist; /* pointer to locks blocked on this */
1189 wait_queue_head_t block_q;
1198 * One of these for each open instance of a file
1200 struct cifs_search_info {
1201 loff_t index_of_last_entry;
1202 __u16 entries_in_buffer;
1205 char *ntwrk_buf_start;
1206 char *srch_entries_start;
1208 const char *presume_name;
1209 unsigned int resume_name_len;
1213 bool smallBuf:1; /* so we know which buf_release function to call */
1216 #define ACL_NO_MODE ((umode_t)(-1))
1217 struct cifs_open_parms {
1218 struct cifs_tcon *tcon;
1219 struct cifs_sb_info *cifs_sb;
1224 struct cifs_fid *fid;
1231 __u64 persistent_fid; /* persist file id for smb2 */
1232 __u64 volatile_fid; /* volatile file id for smb2 */
1233 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1234 __u8 create_guid[16];
1236 struct cifs_pending_open *pending_open;
1238 #ifdef CONFIG_CIFS_DEBUG2
1240 #endif /* CIFS_DEBUG2 */
1244 struct cifs_fid_locks {
1245 struct list_head llist;
1246 struct cifsFileInfo *cfile; /* fid that owns locks */
1247 struct list_head locks; /* locks held by fid above */
1250 struct cifsFileInfo {
1251 /* following two lists are protected by tcon->open_file_lock */
1252 struct list_head tlist; /* pointer to next fid owned by tcon */
1253 struct list_head flist; /* next fid (file instance) for this inode */
1254 /* lock list below protected by cifsi->lock_sem */
1255 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1256 kuid_t uid; /* allows finding which FileInfo structure */
1257 __u32 pid; /* process id who opened file */
1258 struct cifs_fid fid; /* file id from remote */
1259 struct list_head rlist; /* reconnect list */
1260 /* BB add lock scope info here if needed */ ;
1261 /* lock scope id (0 if none) */
1262 struct dentry *dentry;
1263 struct tcon_link *tlink;
1264 unsigned int f_flags;
1265 bool invalidHandle:1; /* file closed via session abend */
1267 bool oplock_break_cancelled:1;
1268 unsigned int oplock_epoch; /* epoch from the lease break */
1269 __u32 oplock_level; /* oplock/lease level from the lease break */
1271 spinlock_t file_info_lock; /* protects four flag/count fields above */
1272 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1273 struct cifs_search_info srch_inf;
1274 struct work_struct oplock_break; /* work for oplock breaks */
1275 struct work_struct put; /* work for the final part of _put */
1276 struct delayed_work deferred;
1277 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1280 struct cifs_io_parms {
1282 __u64 persistent_fid; /* persist file id for smb2 */
1283 __u64 volatile_fid; /* volatile file id for smb2 */
1286 unsigned int length;
1287 struct cifs_tcon *tcon;
1288 struct TCP_Server_Info *server;
1291 struct cifs_aio_ctx {
1292 struct kref refcount;
1293 struct list_head list;
1294 struct mutex aio_mutex;
1295 struct completion done;
1296 struct iov_iter iter;
1298 struct cifsFileInfo *cfile;
1301 unsigned int npages;
1304 unsigned int total_len;
1307 * Indicates if this aio_ctx is for direct_io,
1308 * If yes, iter is a copy of the user passed iov_iter
1313 /* asynchronous read support */
1314 struct cifs_readdata {
1315 struct kref refcount;
1316 struct list_head list;
1317 struct completion done;
1318 struct cifsFileInfo *cfile;
1319 struct address_space *mapping;
1320 struct cifs_aio_ctx *ctx;
1323 unsigned int got_bytes;
1326 struct work_struct work;
1327 int (*read_into_pages)(struct TCP_Server_Info *server,
1328 struct cifs_readdata *rdata,
1330 int (*copy_into_pages)(struct TCP_Server_Info *server,
1331 struct cifs_readdata *rdata,
1332 struct iov_iter *iter);
1334 struct TCP_Server_Info *server;
1335 #ifdef CONFIG_CIFS_SMB_DIRECT
1338 unsigned int pagesz;
1339 unsigned int page_offset;
1340 unsigned int tailsz;
1341 struct cifs_credits credits;
1342 unsigned int nr_pages;
1343 struct page **pages;
1346 /* asynchronous write support */
1347 struct cifs_writedata {
1348 struct kref refcount;
1349 struct list_head list;
1350 struct completion done;
1351 enum writeback_sync_modes sync_mode;
1352 struct work_struct work;
1353 struct cifsFileInfo *cfile;
1354 struct cifs_aio_ctx *ctx;
1359 struct TCP_Server_Info *server;
1360 #ifdef CONFIG_CIFS_SMB_DIRECT
1363 unsigned int pagesz;
1364 unsigned int page_offset;
1365 unsigned int tailsz;
1366 struct cifs_credits credits;
1367 unsigned int nr_pages;
1368 struct page **pages;
1372 * Take a reference on the file private data. Must be called with
1373 * cfile->file_info_lock held.
1376 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1381 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1382 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1384 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1386 #define CIFS_CACHE_READ_FLG 1
1387 #define CIFS_CACHE_HANDLE_FLG 2
1388 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1389 #define CIFS_CACHE_WRITE_FLG 4
1390 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1391 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1393 #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))
1394 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1395 #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))
1398 * One of these for each file inode
1401 struct cifsInodeInfo {
1402 bool can_cache_brlcks;
1403 struct list_head llist; /* locks helb by this inode */
1405 * NOTE: Some code paths call down_read(lock_sem) twice, so
1406 * we must always use cifs_down_write() instead of down_write()
1407 * for this semaphore to avoid deadlocks.
1409 struct rw_semaphore lock_sem; /* protect the fields above */
1410 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1411 struct list_head openFileList;
1412 spinlock_t open_file_lock; /* protects openFileList */
1413 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1414 unsigned int oplock; /* oplock/lease level we have */
1415 unsigned int epoch; /* used to track lease state changes */
1416 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1417 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1418 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1419 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1420 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1421 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1422 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1423 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1424 unsigned long flags;
1425 spinlock_t writers_lock;
1426 unsigned int writers; /* Number of writers on this inode */
1427 unsigned long time; /* jiffies of last update of inode */
1428 u64 server_eof; /* current file size on server -- protected by i_lock */
1429 u64 uniqueid; /* server inode number */
1430 u64 createtime; /* creation time on server */
1431 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1432 #ifdef CONFIG_CIFS_FSCACHE
1433 struct fscache_cookie *fscache;
1435 struct inode vfs_inode;
1436 struct list_head deferred_closes; /* list of deferred closes */
1437 spinlock_t deferred_lock; /* protection on deferred list */
1438 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1441 static inline struct cifsInodeInfo *
1442 CIFS_I(struct inode *inode)
1444 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1447 static inline struct cifs_sb_info *
1448 CIFS_SB(struct super_block *sb)
1450 return sb->s_fs_info;
1453 static inline struct cifs_sb_info *
1454 CIFS_FILE_SB(struct file *file)
1456 return CIFS_SB(file_inode(file)->i_sb);
1459 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1468 convert_delimiter(char *path, char delim)
1470 char old_delim, *pos;
1478 while ((pos = strchr(pos, old_delim)))
1482 #define cifs_stats_inc atomic_inc
1484 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1488 spin_lock(&tcon->stat_lock);
1489 tcon->bytes_written += bytes;
1490 spin_unlock(&tcon->stat_lock);
1494 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1497 spin_lock(&tcon->stat_lock);
1498 tcon->bytes_read += bytes;
1499 spin_unlock(&tcon->stat_lock);
1504 * This is the prototype for the mid receive function. This function is for
1505 * receiving the rest of the SMB frame, starting with the WordCount (which is
1506 * just after the MID in struct smb_hdr). Note:
1508 * - This will be called by cifsd, with no locks held.
1509 * - The mid will still be on the pending_mid_q.
1510 * - mid->resp_buf will point to the current buffer.
1512 * Returns zero on a successful receive, or an error. The receive state in
1513 * the TCP_Server_Info will also be updated.
1515 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1516 struct mid_q_entry *mid);
1519 * This is the prototype for the mid callback function. This is called once the
1520 * mid has been received off of the socket. When creating one, take special
1521 * care to avoid deadlocks. Things to bear in mind:
1523 * - it will be called by cifsd, with no locks held
1524 * - the mid will be removed from any lists
1526 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1529 * This is the protopyte for mid handle function. This is called once the mid
1530 * has been recognized after decryption of the message.
1532 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1533 struct mid_q_entry *mid);
1535 /* one of these for every pending CIFS request to the server */
1536 struct mid_q_entry {
1537 struct list_head qhead; /* mids waiting on reply from this server */
1538 struct kref refcount;
1539 struct TCP_Server_Info *server; /* server corresponding to this mid */
1540 __u64 mid; /* multiplex id */
1541 __u16 credits; /* number of credits consumed by this mid */
1542 __u16 credits_received; /* number of credits from the response */
1543 __u32 pid; /* process id */
1544 __u32 sequence_number; /* for CIFS signing */
1545 unsigned long when_alloc; /* when mid was created */
1546 #ifdef CONFIG_CIFS_STATS2
1547 unsigned long when_sent; /* time when smb send finished */
1548 unsigned long when_received; /* when demux complete (taken off wire) */
1550 mid_receive_t *receive; /* call receive callback */
1551 mid_callback_t *callback; /* call completion callback */
1552 mid_handle_t *handle; /* call handle mid callback */
1553 void *callback_data; /* general purpose pointer for callback */
1554 struct task_struct *creator;
1555 void *resp_buf; /* pointer to received SMB header */
1556 unsigned int resp_buf_size;
1557 int mid_state; /* wish this were enum but can not pass to wait_event */
1558 unsigned int mid_flags;
1559 __le16 command; /* smb command code */
1560 unsigned int optype; /* operation type */
1561 bool large_buf:1; /* if valid response, is pointer to large buf */
1562 bool multiRsp:1; /* multiple trans2 responses for one request */
1563 bool multiEnd:1; /* both received */
1564 bool decrypted:1; /* decrypted entry */
1567 struct close_cancelled_open {
1568 struct cifs_fid fid;
1569 struct cifs_tcon *tcon;
1570 struct work_struct work;
1575 /* Make code in transport.c a little cleaner by moving
1576 update of optional stats into function below */
1577 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1579 atomic_inc(&server->in_send);
1582 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1584 atomic_dec(&server->in_send);
1587 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1589 atomic_inc(&server->num_waiters);
1592 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1594 atomic_dec(&server->num_waiters);
1597 #ifdef CONFIG_CIFS_STATS2
1598 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1600 mid->when_sent = jiffies;
1603 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1608 /* for pending dnotify requests */
1609 struct dir_notify_req {
1610 struct list_head lhead;
1617 __u32 filter; /* CompletionFilter (for multishot) */
1622 struct dfs_info3_param {
1623 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1633 struct list_head list;
1634 struct cifsFileInfo *cfile;
1638 * common struct for holding inode info when searching for or updating an
1639 * inode with new info
1642 #define CIFS_FATTR_DFS_REFERRAL 0x1
1643 #define CIFS_FATTR_DELETE_PENDING 0x2
1644 #define CIFS_FATTR_NEED_REVAL 0x4
1645 #define CIFS_FATTR_INO_COLLISION 0x8
1646 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1647 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1660 unsigned int cf_nlink;
1661 unsigned int cf_dtype;
1662 struct timespec64 cf_atime;
1663 struct timespec64 cf_mtime;
1664 struct timespec64 cf_ctime;
1668 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1671 kfree(param->path_name);
1672 kfree(param->node_name);
1676 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1677 int number_of_items)
1680 if ((number_of_items == 0) || (param == NULL))
1682 for (i = 0; i < number_of_items; i++) {
1683 kfree(param[i].path_name);
1684 kfree(param[i].node_name);
1689 static inline bool is_interrupt_error(int error)
1694 case -ERESTARTNOHAND:
1695 case -ERESTARTNOINTR:
1701 static inline bool is_retryable_error(int error)
1703 if (is_interrupt_error(error) || error == -EAGAIN)
1709 /* cifs_get_writable_file() flags */
1710 #define FIND_WR_ANY 0
1711 #define FIND_WR_FSUID_ONLY 1
1712 #define FIND_WR_WITH_DELETE 2
1715 #define MID_REQUEST_ALLOCATED 1
1716 #define MID_REQUEST_SUBMITTED 2
1717 #define MID_RESPONSE_RECEIVED 4
1718 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1719 #define MID_RESPONSE_MALFORMED 0x10
1720 #define MID_SHUTDOWN 0x20
1723 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1724 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1726 /* Types of response buffer returned from SendReceive2 */
1727 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1728 #define CIFS_SMALL_BUFFER 1
1729 #define CIFS_LARGE_BUFFER 2
1730 #define CIFS_IOVEC 4 /* array of response buffers */
1732 /* Type of Request to SendReceive2 */
1733 #define CIFS_BLOCKING_OP 1 /* operation can block */
1734 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1735 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1736 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1737 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1738 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1740 /* Type of request operation */
1741 #define CIFS_ECHO_OP 0x080 /* echo request */
1742 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1743 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1744 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1745 /* Lower bitmask values are reserved by others below. */
1746 #define CIFS_SESS_OP 0x2000 /* session setup request */
1747 #define CIFS_OP_MASK 0x2780 /* mask request type */
1749 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1750 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1751 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1753 /* Security Flags: indicate type of session setup needed */
1754 #define CIFSSEC_MAY_SIGN 0x00001
1755 #define CIFSSEC_MAY_NTLMV2 0x00004
1756 #define CIFSSEC_MAY_KRB5 0x00008
1757 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1758 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1760 #define CIFSSEC_MUST_SIGN 0x01001
1761 /* note that only one of the following can be set so the
1762 result of setting MUST flags more than once will be to
1763 require use of the stronger protocol */
1764 #define CIFSSEC_MUST_NTLMV2 0x04004
1765 #define CIFSSEC_MUST_KRB5 0x08008
1766 #ifdef CONFIG_CIFS_UPCALL
1767 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1769 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1771 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1772 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1774 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1775 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1776 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1778 *****************************************************************
1779 * All constants go here
1780 *****************************************************************
1783 #define UID_HASH (16)
1786 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1787 * following to be declared.
1790 /****************************************************************************
1791 * Locking notes. All updates to global variables and lists should be
1792 * protected by spinlocks or semaphores.
1796 * GlobalMid_Lock protects:
1797 * list operations on pending_mid_q and oplockQ
1798 * updates to XID counters, multiplex id and SMB sequence numbers
1799 * list operations on global DnotifyReqList
1800 * updates to ses->status and TCP_Server_Info->tcpStatus
1801 * updates to server->CurrentMid
1802 * tcp_ses_lock protects:
1803 * list operations on tcp and SMB session lists
1804 * tcon->open_file_lock protects the list of open files hanging off the tcon
1805 * inode->open_file_lock protects the openFileList hanging off the inode
1806 * cfile->file_info_lock protects counters and fields in cifs file struct
1807 * f_owner.lock protects certain per file struct operations
1808 * mapping->page_lock protects certain per page operations
1810 * Note that the cifs_tcon.open_file_lock should be taken before
1811 * not after the cifsInodeInfo.open_file_lock
1815 * cifsInodeInfo->lock_sem protects:
1816 * the list of locks held by the inode
1818 ****************************************************************************/
1820 #ifdef DECLARE_GLOBALS_HERE
1821 #define GLOBAL_EXTERN
1823 #define GLOBAL_EXTERN extern
1827 * the list of TCP_Server_Info structures, ie each of the sockets
1828 * connecting our client to a distinct server (ip address), is
1829 * chained together by cifs_tcp_ses_list. The list of all our SMB
1830 * sessions (and from that the tree connections) can be found
1831 * by iterating over cifs_tcp_ses_list
1833 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1836 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1837 * tcp session, and the list of tcon's per smb session. It also protects
1838 * the reference counters for the server, smb session, and tcon. It also
1839 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1840 * changes to the tcon->tidStatus should be done while holding this lock.
1841 * generally the locks should be taken in order tcp_ses_lock before
1842 * tcon->open_file_lock and that before file->file_info_lock since the
1843 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1845 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1848 * Global transaction id (XID) information
1850 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1851 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1852 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1853 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1854 /* on midQ entries */
1856 * Global counters, updated atomically
1858 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1859 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1860 GLOBAL_EXTERN atomic_t tcpSesNextId;
1861 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1862 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1863 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1865 /* Various Debug counters */
1866 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1867 #ifdef CONFIG_CIFS_STATS2
1868 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1869 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1870 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1872 GLOBAL_EXTERN atomic_t smBufAllocCount;
1873 GLOBAL_EXTERN atomic_t midCount;
1876 extern bool enable_oplocks; /* enable or disable oplocks */
1877 extern bool lookupCacheEnabled;
1878 extern unsigned int global_secflags; /* if on, session setup sent
1879 with more secure ntlmssp2 challenge/resp */
1880 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1881 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1882 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1883 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1884 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1885 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1886 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1887 extern unsigned int cifs_min_small; /* min size of small buf pool */
1888 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1889 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1891 void cifs_oplock_break(struct work_struct *work);
1892 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1893 void smb2_deferred_work_close(struct work_struct *work);
1895 extern const struct slow_work_ops cifs_oplock_break_ops;
1896 extern struct workqueue_struct *cifsiod_wq;
1897 extern struct workqueue_struct *decrypt_wq;
1898 extern struct workqueue_struct *fileinfo_put_wq;
1899 extern struct workqueue_struct *cifsoplockd_wq;
1900 extern struct workqueue_struct *deferredclose_wq;
1901 extern __u32 cifs_lock_secret;
1903 extern mempool_t *cifs_mid_poolp;
1905 /* Operations for different SMB versions */
1906 #define SMB1_VERSION_STRING "1.0"
1907 extern struct smb_version_operations smb1_operations;
1908 extern struct smb_version_values smb1_values;
1909 #define SMB20_VERSION_STRING "2.0"
1910 extern struct smb_version_operations smb20_operations;
1911 extern struct smb_version_values smb20_values;
1912 #define SMB21_VERSION_STRING "2.1"
1913 extern struct smb_version_operations smb21_operations;
1914 extern struct smb_version_values smb21_values;
1915 #define SMBDEFAULT_VERSION_STRING "default"
1916 extern struct smb_version_values smbdefault_values;
1917 #define SMB3ANY_VERSION_STRING "3"
1918 extern struct smb_version_values smb3any_values;
1919 #define SMB30_VERSION_STRING "3.0"
1920 extern struct smb_version_operations smb30_operations;
1921 extern struct smb_version_values smb30_values;
1922 #define SMB302_VERSION_STRING "3.02"
1923 #define ALT_SMB302_VERSION_STRING "3.0.2"
1924 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1925 extern struct smb_version_values smb302_values;
1926 #define SMB311_VERSION_STRING "3.1.1"
1927 #define ALT_SMB311_VERSION_STRING "3.11"
1928 extern struct smb_version_operations smb311_operations;
1929 extern struct smb_version_values smb311_values;
1931 static inline char *get_security_type_str(enum securityEnum sectype)
1935 return "RawNTLMSSP";
1945 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1947 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
1950 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
1953 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
1954 * Subsystem Notifies That a Share Is a DFS Share.
1956 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
1957 * Application Updates a Share.
1959 if (!tcon || !tcon->ses || !tcon->ses->server)
1961 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
1962 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
1965 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
1966 const struct dfs_info3_param *ref)
1969 * Check if all targets are capable of handling DFS referrals as per
1970 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
1972 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
1975 #endif /* _CIFS_GLOB_H */