1 /* SPDX-License-Identifier: LGPL-2.1 */
4 * Copyright (C) International Business Machines Corp., 2002,2008
13 #include <linux/in6.h>
14 #include <linux/inet.h>
15 #include <linux/slab.h>
16 #include <linux/mempool.h>
17 #include <linux/workqueue.h>
18 #include <linux/utsname.h>
19 #include <linux/netfs.h>
20 #include "cifs_fs_sb.h"
22 #include <crypto/internal/hash.h>
23 #include <linux/scatterlist.h>
24 #include <uapi/linux/cifs/cifs_mount.h>
25 #include "../smbfs_common/smb2pdu.h"
28 #define SMB_PATH_MAX 260
30 #define RFC1001_PORT 139
33 * The sizes of various internal tables and strings
35 #define MAX_UID_INFO 16
36 #define MAX_SES_INFO 2
37 #define MAX_TCON_INFO 4
39 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
41 #define CIFS_MIN_RCV_POOL 4
43 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
45 * default attribute cache timeout (jiffies)
47 #define CIFS_DEF_ACTIMEO (1 * HZ)
50 * max attribute cache timeout (jiffies) - 2^30
52 #define CIFS_MAX_ACTIMEO (1 << 30)
55 * Max persistent and resilient handle timeout (milliseconds).
56 * Windows durable max was 960000 (16 minutes)
58 #define SMB3_MAX_HANDLE_TIMEOUT 960000
61 * MAX_REQ is the maximum number of requests that WE will send
62 * on one socket concurrently.
64 #define CIFS_MAX_REQ 32767
66 #define RFC1001_NAME_LEN 15
67 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69 /* maximum length of ip addr as a string (including ipv6 and sctp) */
70 #define SERVER_NAME_LENGTH 80
71 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73 /* echo interval in seconds */
74 #define SMB_ECHO_INTERVAL_MIN 1
75 #define SMB_ECHO_INTERVAL_MAX 600
76 #define SMB_ECHO_INTERVAL_DEFAULT 60
78 /* dns resolution intervals in seconds */
79 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
80 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
82 /* maximum number of PDUs in one compound */
83 #define MAX_COMPOUND 5
86 * Default number of credits to keep available for SMB3.
87 * This value is chosen somewhat arbitrarily. The Windows client
88 * defaults to 128 credits, the Windows server allows clients up to
89 * 512 credits (or 8K for later versions), and the NetApp server
90 * does not limit clients at all. Choose a high enough default value
91 * such that the client shouldn't limit performance, but allow mount
92 * to override (until you approach 64K, where we limit credits to 65000
93 * to reduce possibility of seeing more server credit overflow bugs.
95 #define SMB2_MAX_CREDITS_AVAILABLE 32000
99 #ifndef XATTR_DOS_ATTRIB
100 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
103 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
106 * CIFS vfs client Status information (based on what we know.)
109 /* associated with each tcp and smb session */
121 /* associated with each tree connection to the server */
122 enum tid_status_enum {
129 TID_NEED_FILES_INVALIDATE, /* currently unused */
130 TID_IN_FILES_INVALIDATE
134 Unspecified = 0, /* not specified */
135 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
136 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
137 Kerberos, /* Kerberos via SPNEGO */
145 /* crypto security descriptor definition */
147 struct shash_desc shash;
151 /* crypto hashing related structure/fields, not specific to a sec mech */
152 struct cifs_secmech {
153 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
154 struct crypto_shash *md5; /* md5 hash function */
155 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
156 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
157 struct crypto_shash *sha512; /* sha512 hash function */
158 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
159 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
160 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
161 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
162 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
163 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
164 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
167 /* per smb session structure/fields */
168 struct ntlmssp_auth {
169 bool sesskey_per_smbsess; /* whether session key is per smb session */
170 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
171 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
172 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
173 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
181 struct cifs_sid osid;
182 struct cifs_sid gsid;
183 struct cifs_ntace *ntaces;
184 struct cifs_ace *aces;
188 *****************************************************************
189 * Except the CIFS PDUs themselves all the
190 * globally interesting structs should go here
191 *****************************************************************
195 * A smb_rqst represents a complete request to be issued to a server. It's
196 * formed by a kvec array, followed by an array of pages. Page data is assumed
197 * to start at the beginning of the first page.
200 struct kvec *rq_iov; /* array of kvecs */
201 unsigned int rq_nvec; /* number of kvecs in array */
202 struct page **rq_pages; /* pointer to array of page ptrs */
203 unsigned int rq_offset; /* the offset to the 1st page */
204 unsigned int rq_npages; /* number pages in array */
205 unsigned int rq_pagesz; /* page size to use */
206 unsigned int rq_tailsz; /* length of last page */
210 struct TCP_Server_Info;
214 struct dfs_info3_param;
216 struct smb3_fs_context;
218 struct cifs_readdata;
219 struct cifs_writedata;
220 struct cifs_io_parms;
221 struct cifs_search_info;
222 struct cifsInodeInfo;
223 struct cifs_open_parms;
226 struct smb_version_operations {
227 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
228 struct mid_q_entry *);
229 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
230 /* setup request: allocate mid, sign message */
231 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
232 struct TCP_Server_Info *,
234 /* setup async request: allocate mid, sign message */
235 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
237 /* check response: verify signature, map error */
238 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
240 void (*add_credits)(struct TCP_Server_Info *server,
241 const struct cifs_credits *credits,
243 void (*set_credits)(struct TCP_Server_Info *, const int);
244 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
245 unsigned int (*get_credits)(struct mid_q_entry *);
246 __u64 (*get_next_mid)(struct TCP_Server_Info *);
247 void (*revert_current_mid)(struct TCP_Server_Info *server,
248 const unsigned int val);
249 /* data offset from read response message */
250 unsigned int (*read_data_offset)(char *);
252 * Data length from read response message
253 * When in_remaining is true, the returned data length is in
254 * message field DataRemaining for out-of-band data read (e.g through
255 * Memory Registration RDMA write in SMBD).
256 * Otherwise, the returned data length is in message field DataLength.
258 unsigned int (*read_data_length)(char *, bool in_remaining);
259 /* map smb to linux error */
260 int (*map_error)(char *, bool);
261 /* find mid corresponding to the response message */
262 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
263 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
264 void (*clear_stats)(struct cifs_tcon *);
265 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
266 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
267 /* verify the message */
268 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
269 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
270 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
271 void (*downgrade_oplock)(struct TCP_Server_Info *server,
272 struct cifsInodeInfo *cinode, __u32 oplock,
273 unsigned int epoch, bool *purge_cache);
274 /* process transaction2 response */
275 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
277 /* check if we need to negotiate */
278 bool (*need_neg)(struct TCP_Server_Info *);
279 /* negotiate to the server */
280 int (*negotiate)(const unsigned int xid,
281 struct cifs_ses *ses,
282 struct TCP_Server_Info *server);
283 /* set negotiated write size */
284 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
285 /* set negotiated read size */
286 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
287 /* setup smb sessionn */
288 int (*sess_setup)(const unsigned int, struct cifs_ses *,
289 struct TCP_Server_Info *server,
290 const struct nls_table *);
291 /* close smb session */
292 int (*logoff)(const unsigned int, struct cifs_ses *);
293 /* connect to a server share */
294 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
295 struct cifs_tcon *, const struct nls_table *);
296 /* close tree connecion */
297 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
298 /* get DFS referrals */
299 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
300 const char *, struct dfs_info3_param **,
301 unsigned int *, const struct nls_table *, int);
302 /* informational QFS call */
303 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
304 struct cifs_sb_info *);
305 /* check if a path is accessible or not */
306 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
307 struct cifs_sb_info *, const char *);
308 /* query path data from the server */
309 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
310 struct cifs_sb_info *, const char *,
311 FILE_ALL_INFO *, bool *, bool *);
312 /* query file data from the server */
313 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
314 struct cifs_fid *, FILE_ALL_INFO *);
315 /* query reparse tag from srv to determine which type of special file */
316 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
317 struct cifs_sb_info *cifs_sb, const char *path,
319 /* get server index number */
320 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
321 struct cifs_sb_info *, const char *,
322 u64 *uniqueid, FILE_ALL_INFO *);
323 /* set size by path */
324 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
325 const char *, __u64, struct cifs_sb_info *, bool);
326 /* set size by file handle */
327 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
328 struct cifsFileInfo *, __u64, bool);
330 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
332 int (*set_compression)(const unsigned int, struct cifs_tcon *,
333 struct cifsFileInfo *);
334 /* check if we can send an echo or nor */
335 bool (*can_echo)(struct TCP_Server_Info *);
336 /* send echo request */
337 int (*echo)(struct TCP_Server_Info *);
338 /* create directory */
339 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
340 umode_t mode, struct cifs_tcon *tcon,
341 const char *full_path,
342 struct cifs_sb_info *cifs_sb);
343 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
344 struct cifs_tcon *tcon, const char *name,
345 struct cifs_sb_info *sb);
346 /* set info on created directory */
347 void (*mkdir_setinfo)(struct inode *, const char *,
348 struct cifs_sb_info *, struct cifs_tcon *,
350 /* remove directory */
351 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
352 struct cifs_sb_info *);
354 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
355 struct cifs_sb_info *);
356 /* open, rename and delete file */
357 int (*rename_pending_delete)(const char *, struct dentry *,
359 /* send rename request */
360 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
361 const char *, struct cifs_sb_info *);
362 /* send create hardlink request */
363 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
364 const char *, const char *,
365 struct cifs_sb_info *);
366 /* query symlink target */
367 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
368 struct cifs_sb_info *, const char *,
370 /* open a file for non-posix mounts */
371 int (*open)(const unsigned int, struct cifs_open_parms *,
372 __u32 *, FILE_ALL_INFO *);
373 /* set fid protocol-specific info */
374 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
376 void (*close)(const unsigned int, struct cifs_tcon *,
378 /* close a file, returning file attributes and timestamps */
379 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
380 struct cifsFileInfo *pfile_info);
381 /* send a flush request to the server */
382 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
383 /* async read from the server */
384 int (*async_readv)(struct cifs_readdata *);
385 /* async write to the server */
386 int (*async_writev)(struct cifs_writedata *,
387 void (*release)(struct kref *));
388 /* sync read from the server */
389 int (*sync_read)(const unsigned int, struct cifs_fid *,
390 struct cifs_io_parms *, unsigned int *, char **,
392 /* sync write to the server */
393 int (*sync_write)(const unsigned int, struct cifs_fid *,
394 struct cifs_io_parms *, unsigned int *, struct kvec *,
396 /* open dir, start readdir */
397 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
398 const char *, struct cifs_sb_info *,
399 struct cifs_fid *, __u16,
400 struct cifs_search_info *);
401 /* continue readdir */
402 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
404 __u16, struct cifs_search_info *srch_inf);
406 int (*close_dir)(const unsigned int, struct cifs_tcon *,
408 /* calculate a size of SMB message */
409 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
410 /* check for STATUS_PENDING and process the response if yes */
411 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
412 /* check for STATUS_NETWORK_SESSION_EXPIRED */
413 bool (*is_session_expired)(char *);
414 /* send oplock break response */
415 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
416 struct cifsInodeInfo *);
417 /* query remote filesystem */
418 int (*queryfs)(const unsigned int, struct cifs_tcon *,
419 struct cifs_sb_info *, struct kstatfs *);
420 /* send mandatory brlock to the server */
421 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
422 __u64, __u32, int, int, bool);
423 /* unlock range of mandatory locks */
424 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
426 /* push brlocks from the cache to the server */
427 int (*push_mand_locks)(struct cifsFileInfo *);
428 /* get lease key of the inode */
429 void (*get_lease_key)(struct inode *, struct cifs_fid *);
430 /* set lease key of the inode */
431 void (*set_lease_key)(struct inode *, struct cifs_fid *);
432 /* generate new lease key */
433 void (*new_lease_key)(struct cifs_fid *);
434 int (*generate_signingkey)(struct cifs_ses *ses,
435 struct TCP_Server_Info *server);
436 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
437 bool allocate_crypto);
438 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
439 struct cifsFileInfo *src_file);
440 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
441 struct cifsFileInfo *src_file, void __user *);
442 int (*notify)(const unsigned int xid, struct file *pfile,
444 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
445 struct cifs_sb_info *, const unsigned char *,
446 char *, unsigned int *);
447 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
448 struct cifs_sb_info *, const unsigned char *,
449 char *, unsigned int *);
450 /* if we can do cache read operations */
451 bool (*is_read_op)(__u32);
452 /* set oplock level for the inode */
453 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
455 /* create lease context buffer for CREATE request */
456 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
457 /* parse lease context buffer and return oplock/epoch info */
458 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
459 ssize_t (*copychunk_range)(const unsigned int,
460 struct cifsFileInfo *src_file,
461 struct cifsFileInfo *target_file,
462 u64 src_off, u64 len, u64 dest_off);
463 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
464 struct cifsFileInfo *target_file, u64 src_off, u64 len,
466 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
467 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
468 const unsigned char *, const unsigned char *, char *,
469 size_t, struct cifs_sb_info *);
470 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
471 const char *, const void *, const __u16,
472 const struct nls_table *, struct cifs_sb_info *);
473 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
474 const char *, u32 *, u32);
475 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
476 const struct cifs_fid *, u32 *, u32);
477 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
479 /* writepages retry size */
480 unsigned int (*wp_retry_size)(struct inode *);
481 /* get mtu credits */
482 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
483 unsigned int *, struct cifs_credits *);
484 /* adjust previously taken mtu credits to request size */
485 int (*adjust_credits)(struct TCP_Server_Info *server,
486 struct cifs_credits *credits,
487 const unsigned int payload_size);
488 /* check if we need to issue closedir */
489 bool (*dir_needs_close)(struct cifsFileInfo *);
490 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
492 /* init transform request - used for encryption for now */
493 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
494 struct smb_rqst *, struct smb_rqst *);
495 int (*is_transform_hdr)(void *buf);
496 int (*receive_transform)(struct TCP_Server_Info *,
497 struct mid_q_entry **, char **, int *);
498 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
500 int (*next_header)(char *);
501 /* ioctl passthrough for query_info */
502 int (*ioctl_query_info)(const unsigned int xid,
503 struct cifs_tcon *tcon,
504 struct cifs_sb_info *cifs_sb,
505 __le16 *path, int is_dir,
507 /* make unix special files (block, char, fifo, socket) */
508 int (*make_node)(unsigned int xid,
510 struct dentry *dentry,
511 struct cifs_tcon *tcon,
512 const char *full_path,
514 dev_t device_number);
515 /* version specific fiemap implementation */
516 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
517 struct fiemap_extent_info *, u64, u64);
518 /* version specific llseek implementation */
519 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
520 /* Check for STATUS_IO_TIMEOUT */
521 bool (*is_status_io_timeout)(char *buf);
522 /* Check for STATUS_NETWORK_NAME_DELETED */
523 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
526 struct smb_version_values {
527 char *version_string;
529 __u32 req_capabilities;
530 __u32 large_lock_type;
531 __u32 exclusive_lock_type;
532 __u32 shared_lock_type;
533 __u32 unlock_lock_type;
534 size_t header_preamble_size;
536 size_t max_header_size;
537 size_t read_rsp_size;
539 unsigned int cap_unix;
540 unsigned int cap_nt_find;
541 unsigned int cap_large_files;
542 __u16 signing_enabled;
543 __u16 signing_required;
544 size_t create_lease_size;
547 #define HEADER_SIZE(server) (server->vals->header_size)
548 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
551 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
552 * trying to reuse existing superblock for a new mount
554 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
555 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
556 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
557 CIFS_MOUNT_MAP_SFM_CHR | \
558 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
559 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
560 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
561 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
562 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
563 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
564 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
565 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
566 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
567 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
570 * Generic VFS superblock mount flags (s_flags) to consider when
571 * trying to reuse existing superblock for a new mount
573 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
574 SB_NODEV | SB_SYNCHRONOUS)
576 struct cifs_mnt_data {
577 struct cifs_sb_info *cifs_sb;
578 struct smb3_fs_context *ctx;
582 static inline unsigned int
583 get_rfc1002_length(void *buf)
585 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
589 inc_rfc1001_len(void *buf, int count)
591 be32_add_cpu((__be32 *)buf, count);
594 struct TCP_Server_Info {
595 struct list_head tcp_ses_list;
596 struct list_head smb_ses_list;
597 __u64 conn_id; /* connection identifier (useful for debugging) */
598 int srv_count; /* reference counter */
599 /* 15 character server name + 0x20 16th byte indicating type = srv */
600 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
601 struct smb_version_operations *ops;
602 struct smb_version_values *vals;
603 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
604 enum statusEnum tcpStatus; /* what we think the status is */
605 char *hostname; /* hostname portion of UNC string */
606 struct socket *ssocket;
607 struct sockaddr_storage dstaddr;
608 struct sockaddr_storage srcaddr; /* locally bind to this IP */
612 wait_queue_head_t response_q;
613 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
614 struct list_head pending_mid_q;
615 bool noblocksnd; /* use blocking sendmsg */
616 bool noautotune; /* do not autotune send buf sizes */
619 unsigned int credits; /* send no more requests at once */
620 unsigned int max_credits; /* can override large 32000 default at mnt */
621 unsigned int in_flight; /* number of requests on the wire to server */
622 unsigned int max_in_flight; /* max number of requests that were on wire */
623 spinlock_t req_lock; /* protect the two values above */
624 struct mutex srv_mutex;
625 struct task_struct *tsk;
626 char server_GUID[16];
628 bool sign; /* is signing enabled on this connection? */
629 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
630 bool session_estab; /* mark when very first sess is established */
631 int echo_credits; /* echo reserved slots */
632 int oplock_credits; /* oplock break reserved slots */
633 bool echoes:1; /* enable echoes */
634 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
635 u16 dialect; /* dialect index that server chose */
636 bool oplocks:1; /* enable oplocks */
637 unsigned int maxReq; /* Clients should submit no more */
638 /* than maxReq distinct unanswered SMBs to the server when using */
639 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
640 unsigned int maxBuf; /* maxBuf specifies the maximum */
641 /* message size the server can send or receive for non-raw SMBs */
642 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
643 /* when socket is setup (and during reconnect) before NegProt sent */
644 unsigned int max_rw; /* maxRw specifies the maximum */
645 /* message size the server can send or receive for */
646 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
647 unsigned int capabilities; /* selective disabling of caps by smb sess */
648 int timeAdj; /* Adjust for difference in server time zone in sec */
649 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
650 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
651 /* 16th byte of RFC1001 workstation name is always null */
652 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
653 __u32 sequence_number; /* for signing, protected by srv_mutex */
654 __u32 reconnect_instance; /* incremented on each reconnect */
655 struct session_key session_key;
656 unsigned long lstrp; /* when we got last response from this server */
657 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
658 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
659 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
660 char negflavor; /* NEGOTIATE response flavor */
661 /* extended security flavors that server supports */
662 bool sec_ntlmssp; /* supports NTLMSSP */
663 bool sec_kerberosu2u; /* supports U2U Kerberos */
664 bool sec_kerberos; /* supports plain Kerberos */
665 bool sec_mskerberos; /* supports legacy MS Kerberos */
666 bool large_buf; /* is current buffer large? */
667 /* use SMBD connection instead of socket */
669 /* point to the SMBD connection if RDMA is used instead of socket */
670 struct smbd_connection *smbd_conn;
671 struct delayed_work echo; /* echo ping workqueue job */
672 struct delayed_work resolve; /* dns resolution workqueue job */
673 char *smallbuf; /* pointer to current "small" buffer */
674 char *bigbuf; /* pointer to current "big" buffer */
675 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
676 unsigned int pdu_size;
677 unsigned int total_read; /* total amount of data read in this pass */
678 atomic_t in_send; /* requests trying to send */
679 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
680 #ifdef CONFIG_CIFS_STATS2
681 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
682 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
683 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
684 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
685 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
687 unsigned int max_read;
688 unsigned int max_write;
689 unsigned int min_offload;
690 __le16 compress_algorithm;
691 __u16 signing_algorithm;
693 /* save initital negprot hash */
694 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
695 bool signing_negotiated; /* true if valid signing context rcvd from server */
696 bool posix_ext_supported;
697 struct delayed_work reconnect; /* reconnect workqueue job */
698 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
699 unsigned long echo_interval;
702 * Number of targets available for reconnect. The more targets
703 * the more tasks have to wait to let the demultiplex thread
707 bool noblockcnt; /* use non-blocking connect() */
710 * If this is a session channel,
711 * primary_server holds the ref-counted
712 * pointer to primary channel connection for the session.
714 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
715 struct TCP_Server_Info *primary_server;
717 #ifdef CONFIG_CIFS_SWN_UPCALL
718 bool use_swn_dstaddr;
719 struct sockaddr_storage swn_dstaddr;
721 #ifdef CONFIG_CIFS_DFS_UPCALL
722 bool is_dfs_conn; /* if a dfs connection */
723 struct mutex refpath_lock; /* protects leaf_fullpath */
725 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
727 * origin_fullpath: first or original referral path
728 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
730 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
731 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
733 * format: \\HOST\SHARE\[OPTIONAL PATH]
735 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
739 struct cifs_credits {
741 unsigned int instance;
744 static inline unsigned int
745 in_flight(struct TCP_Server_Info *server)
748 spin_lock(&server->req_lock);
749 num = server->in_flight;
750 spin_unlock(&server->req_lock);
755 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
758 spin_lock(&server->req_lock);
760 spin_unlock(&server->req_lock);
761 return num >= num_credits;
765 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
768 server->ops->add_credits(server, credits, optype);
772 add_credits_and_wake_if(struct TCP_Server_Info *server,
773 const struct cifs_credits *credits, const int optype)
775 if (credits->value) {
776 server->ops->add_credits(server, credits, optype);
777 wake_up(&server->request_q);
782 set_credits(struct TCP_Server_Info *server, const int val)
784 server->ops->set_credits(server, val);
788 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
789 const unsigned int payload_size)
791 return server->ops->adjust_credits ?
792 server->ops->adjust_credits(server, credits, payload_size) : 0;
796 get_next_mid64(struct TCP_Server_Info *server)
798 return cpu_to_le64(server->ops->get_next_mid(server));
802 get_next_mid(struct TCP_Server_Info *server)
804 __u16 mid = server->ops->get_next_mid(server);
806 * The value in the SMB header should be little endian for easy
807 * on-the-wire decoding.
809 return cpu_to_le16(mid);
813 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
815 if (server->ops->revert_current_mid)
816 server->ops->revert_current_mid(server, val);
820 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
821 const struct smb2_hdr *shdr)
823 unsigned int num = le16_to_cpu(shdr->CreditCharge);
825 return revert_current_mid(server, num > 0 ? num : 1);
829 get_mid(const struct smb_hdr *smb)
831 return le16_to_cpu(smb->Mid);
835 compare_mid(__u16 mid, const struct smb_hdr *smb)
837 return mid == le16_to_cpu(smb->Mid);
841 * When the server supports very large reads and writes via POSIX extensions,
842 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
843 * including the RFC1001 length.
845 * Note that this might make for "interesting" allocation problems during
846 * writeback however as we have to allocate an array of pointers for the
847 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
849 * For reads, there is a similar problem as we need to allocate an array
850 * of kvecs to handle the receive, though that should only need to be done
853 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
854 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
857 * When the server doesn't allow large posix writes, only allow a rsize/wsize
858 * of 2^17-1 minus the size of the call header. That allows for a read or
859 * write up to the maximum size described by RFC1002.
861 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
862 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
864 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
867 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
868 * those values when posix extensions aren't in force. In actuality here, we
869 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
870 * to be ok with the extra byte even though Windows doesn't send writes that
875 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
877 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
878 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
881 * Macros to allow the TCP_Server_Info->net field and related code to drop out
882 * when CONFIG_NET_NS isn't set.
887 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
892 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
899 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
904 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
910 struct cifs_server_iface {
912 unsigned int rdma_capable : 1;
913 unsigned int rss_capable : 1;
914 struct sockaddr_storage sockaddr;
918 struct TCP_Server_Info *server;
919 __u8 signkey[SMB3_SIGN_KEY_SIZE];
923 * Session structure. One of these for each uid session with a particular host
926 struct list_head smb_ses_list;
927 struct list_head rlist; /* reconnect list */
928 struct list_head tcon_list;
929 struct cifs_tcon *tcon_ipc;
930 struct mutex session_mutex;
931 struct TCP_Server_Info *server; /* pointer to server info */
932 int ses_count; /* reference counter */
933 enum statusEnum status; /* updates protected by cifs_tcp_ses_lock */
934 unsigned overrideSecFlg; /* if non-zero override global sec flags */
935 char *serverOS; /* name of operating system underlying server */
936 char *serverNOS; /* name of network operating system of server */
937 char *serverDomain; /* security realm of server */
938 __u64 Suid; /* remote smb uid */
939 kuid_t linux_uid; /* overriding owner of files on the mount */
940 kuid_t cred_uid; /* owner of credentials */
941 unsigned int capabilities;
942 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
943 char *user_name; /* must not be null except during init of sess
944 and after mount option parsing we fill it */
947 char *workstation_name;
948 struct session_key auth_key;
949 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
950 enum securityEnum sectype; /* what security flavor was specified? */
951 bool sign; /* is signing required? */
954 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
955 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
956 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
957 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
960 * Network interfaces available on the server this session is
963 * Other channels can be opened by connecting and binding this
964 * session to interfaces from this list.
966 * iface_lock should be taken when accessing any of these fields
968 spinlock_t iface_lock;
969 /* ========= begin: protected by iface_lock ======== */
970 struct cifs_server_iface *iface_list;
972 unsigned long iface_last_update; /* jiffies */
973 /* ========= end: protected by iface_lock ======== */
975 spinlock_t chan_lock;
976 /* ========= begin: protected by chan_lock ======== */
977 #define CIFS_MAX_CHANNELS 16
978 #define CIFS_ALL_CHANNELS_SET(ses) \
979 ((1UL << (ses)->chan_count) - 1)
980 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
981 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
982 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
983 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
984 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
985 test_bit((index), &(ses)->chans_need_reconnect)
987 struct cifs_chan chans[CIFS_MAX_CHANNELS];
990 atomic_t chan_seq; /* round robin state */
993 * chans_need_reconnect is a bitmap indicating which of the channels
994 * under this smb session needs to be reconnected.
995 * If not multichannel session, only one bit will be used.
997 * We will ask for sess and tcon reconnection only if all the
998 * channels are marked for needing reconnection. This will
999 * enable the sessions on top to continue to live till any
1000 * of the channels below are active.
1002 unsigned long chans_need_reconnect;
1003 /* ========= end: protected by chan_lock ======== */
1007 cap_unix(struct cifs_ses *ses)
1009 return ses->server->vals->cap_unix & ses->capabilities;
1013 bool is_valid:1; /* Do we have a useable root fid */
1014 bool file_all_info_is_valid:1;
1016 unsigned long time; /* jiffies of when lease was taken */
1017 struct kref refcount;
1018 struct cifs_fid *fid;
1019 struct mutex fid_mutex;
1020 struct cifs_tcon *tcon;
1021 struct dentry *dentry;
1022 struct work_struct lease_break;
1023 struct smb2_file_all_info file_all_info;
1027 * there is one of these for each connection to a resource on a particular
1031 struct list_head tcon_list;
1033 struct list_head rlist; /* reconnect list */
1034 atomic_t num_local_opens; /* num of all opens including disconnected */
1035 atomic_t num_remote_opens; /* num of all network opens on server */
1036 struct list_head openFileList;
1037 spinlock_t open_file_lock; /* protects list above */
1038 struct cifs_ses *ses; /* pointer to session associated with */
1039 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1040 char *nativeFileSystem;
1041 char *password; /* for share-level security */
1042 __u32 tid; /* The 4 byte tree id */
1043 __u16 Flags; /* optional support bits */
1044 enum tid_status_enum status;
1045 atomic_t num_smbs_sent;
1048 atomic_t num_writes;
1050 atomic_t num_flushes;
1051 atomic_t num_oplock_brks;
1053 atomic_t num_closes;
1054 atomic_t num_deletes;
1055 atomic_t num_mkdirs;
1056 atomic_t num_posixopens;
1057 atomic_t num_posixmkdirs;
1058 atomic_t num_rmdirs;
1059 atomic_t num_renames;
1060 atomic_t num_t2renames;
1061 atomic_t num_ffirst;
1063 atomic_t num_fclose;
1064 atomic_t num_hardlinks;
1065 atomic_t num_symlinks;
1067 atomic_t num_acl_get;
1068 atomic_t num_acl_set;
1071 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1072 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1076 __u64 bytes_written;
1077 spinlock_t stat_lock; /* protects the two fields above */
1078 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1079 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1080 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1081 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1082 bool pipe:1; /* set if connection to pipe share */
1083 bool print:1; /* set if connection to printer share */
1086 bool nohandlecache:1; /* if strange server resource prob can turn off */
1088 bool seal:1; /* transport encryption for this mounted share */
1089 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1090 for this mount even if server would support */
1091 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1092 bool local_lease:1; /* check leases (only) on local system not remote */
1093 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1094 bool broken_sparse_sup; /* if server or share does not support sparse */
1095 bool need_reconnect:1; /* connection reset, tid now invalid */
1096 bool need_reopen_files:1; /* need to reopen tcon file handles */
1097 bool use_resilient:1; /* use resilient instead of durable handles */
1098 bool use_persistent:1; /* use persistent instead of durable handles */
1099 bool no_lease:1; /* Do not request leases on files or directories */
1100 bool use_witness:1; /* use witness protocol */
1101 __le32 capabilities;
1103 __u32 maximal_access;
1104 __u32 vol_serial_number;
1105 __le64 vol_create_time;
1106 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1107 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1108 __u32 ss_flags; /* sector size flags */
1109 __u32 perf_sector_size; /* best sector size for perf */
1111 __u32 max_bytes_chunk;
1112 __u32 max_bytes_copy;
1113 #ifdef CONFIG_CIFS_FSCACHE
1114 u64 resource_id; /* server resource id */
1115 struct fscache_volume *fscache; /* cookie for share */
1117 struct list_head pending_opens; /* list of incomplete opens */
1118 struct cached_fid crfid; /* Cached root fid */
1119 /* BB add field for back pointer to sb struct(s)? */
1120 #ifdef CONFIG_CIFS_DFS_UPCALL
1121 struct list_head ulist; /* cache update list */
1126 * This is a refcounted and timestamped container for a tcon pointer. The
1127 * container holds a tcon reference. It is considered safe to free one of
1128 * these when the tl_count goes to 0. The tl_time is the time of the last
1129 * "get" on the container.
1132 struct rb_node tl_rbnode;
1134 unsigned long tl_flags;
1135 #define TCON_LINK_MASTER 0
1136 #define TCON_LINK_PENDING 1
1137 #define TCON_LINK_IN_TREE 2
1138 unsigned long tl_time;
1140 struct cifs_tcon *tl_tcon;
1143 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1144 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1146 static inline struct cifs_tcon *
1147 tlink_tcon(struct tcon_link *tlink)
1149 return tlink->tl_tcon;
1152 static inline struct tcon_link *
1153 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1155 return cifs_sb->master_tlink;
1158 extern void cifs_put_tlink(struct tcon_link *tlink);
1160 static inline struct tcon_link *
1161 cifs_get_tlink(struct tcon_link *tlink)
1163 if (tlink && !IS_ERR(tlink))
1164 atomic_inc(&tlink->tl_count);
1168 /* This function is always expected to succeed */
1169 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1171 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1173 struct cifs_pending_open {
1174 struct list_head olist;
1175 struct tcon_link *tlink;
1180 struct cifs_deferred_close {
1181 struct list_head dlist;
1182 struct tcon_link *tlink;
1184 __u64 persistent_fid;
1189 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1190 * This is used to track byte stream locks on the file
1192 struct cifsLockInfo {
1193 struct list_head llist; /* pointer to next cifsLockInfo */
1194 struct list_head blist; /* pointer to locks blocked on this */
1195 wait_queue_head_t block_q;
1204 * One of these for each open instance of a file
1206 struct cifs_search_info {
1207 loff_t index_of_last_entry;
1208 __u16 entries_in_buffer;
1211 char *ntwrk_buf_start;
1212 char *srch_entries_start;
1214 const char *presume_name;
1215 unsigned int resume_name_len;
1219 bool smallBuf:1; /* so we know which buf_release function to call */
1222 #define ACL_NO_MODE ((umode_t)(-1))
1223 struct cifs_open_parms {
1224 struct cifs_tcon *tcon;
1225 struct cifs_sb_info *cifs_sb;
1230 struct cifs_fid *fid;
1237 __u64 persistent_fid; /* persist file id for smb2 */
1238 __u64 volatile_fid; /* volatile file id for smb2 */
1239 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1240 __u8 create_guid[16];
1242 struct cifs_pending_open *pending_open;
1244 #ifdef CONFIG_CIFS_DEBUG2
1246 #endif /* CIFS_DEBUG2 */
1250 struct cifs_fid_locks {
1251 struct list_head llist;
1252 struct cifsFileInfo *cfile; /* fid that owns locks */
1253 struct list_head locks; /* locks held by fid above */
1256 struct cifsFileInfo {
1257 /* following two lists are protected by tcon->open_file_lock */
1258 struct list_head tlist; /* pointer to next fid owned by tcon */
1259 struct list_head flist; /* next fid (file instance) for this inode */
1260 /* lock list below protected by cifsi->lock_sem */
1261 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1262 kuid_t uid; /* allows finding which FileInfo structure */
1263 __u32 pid; /* process id who opened file */
1264 struct cifs_fid fid; /* file id from remote */
1265 struct list_head rlist; /* reconnect list */
1266 /* BB add lock scope info here if needed */ ;
1267 /* lock scope id (0 if none) */
1268 struct dentry *dentry;
1269 struct tcon_link *tlink;
1270 unsigned int f_flags;
1271 bool invalidHandle:1; /* file closed via session abend */
1273 bool oplock_break_cancelled:1;
1274 unsigned int oplock_epoch; /* epoch from the lease break */
1275 __u32 oplock_level; /* oplock/lease level from the lease break */
1277 spinlock_t file_info_lock; /* protects four flag/count fields above */
1278 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1279 struct cifs_search_info srch_inf;
1280 struct work_struct oplock_break; /* work for oplock breaks */
1281 struct work_struct put; /* work for the final part of _put */
1282 struct delayed_work deferred;
1283 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1286 struct cifs_io_parms {
1288 __u64 persistent_fid; /* persist file id for smb2 */
1289 __u64 volatile_fid; /* volatile file id for smb2 */
1292 unsigned int length;
1293 struct cifs_tcon *tcon;
1294 struct TCP_Server_Info *server;
1297 struct cifs_aio_ctx {
1298 struct kref refcount;
1299 struct list_head list;
1300 struct mutex aio_mutex;
1301 struct completion done;
1302 struct iov_iter iter;
1304 struct cifsFileInfo *cfile;
1307 unsigned int npages;
1310 unsigned int total_len;
1313 * Indicates if this aio_ctx is for direct_io,
1314 * If yes, iter is a copy of the user passed iov_iter
1319 /* asynchronous read support */
1320 struct cifs_readdata {
1321 struct kref refcount;
1322 struct list_head list;
1323 struct completion done;
1324 struct cifsFileInfo *cfile;
1325 struct address_space *mapping;
1326 struct cifs_aio_ctx *ctx;
1329 unsigned int got_bytes;
1332 struct work_struct work;
1333 int (*read_into_pages)(struct TCP_Server_Info *server,
1334 struct cifs_readdata *rdata,
1336 int (*copy_into_pages)(struct TCP_Server_Info *server,
1337 struct cifs_readdata *rdata,
1338 struct iov_iter *iter);
1340 struct TCP_Server_Info *server;
1341 #ifdef CONFIG_CIFS_SMB_DIRECT
1344 unsigned int pagesz;
1345 unsigned int page_offset;
1346 unsigned int tailsz;
1347 struct cifs_credits credits;
1348 unsigned int nr_pages;
1349 struct page **pages;
1352 /* asynchronous write support */
1353 struct cifs_writedata {
1354 struct kref refcount;
1355 struct list_head list;
1356 struct completion done;
1357 enum writeback_sync_modes sync_mode;
1358 struct work_struct work;
1359 struct cifsFileInfo *cfile;
1360 struct cifs_aio_ctx *ctx;
1365 struct TCP_Server_Info *server;
1366 #ifdef CONFIG_CIFS_SMB_DIRECT
1369 unsigned int pagesz;
1370 unsigned int page_offset;
1371 unsigned int tailsz;
1372 struct cifs_credits credits;
1373 unsigned int nr_pages;
1374 struct page **pages;
1378 * Take a reference on the file private data. Must be called with
1379 * cfile->file_info_lock held.
1382 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1387 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1388 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1390 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1392 #define CIFS_CACHE_READ_FLG 1
1393 #define CIFS_CACHE_HANDLE_FLG 2
1394 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1395 #define CIFS_CACHE_WRITE_FLG 4
1396 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1397 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1399 #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))
1400 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1401 #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))
1404 * One of these for each file inode
1407 struct cifsInodeInfo {
1409 /* These must be contiguous */
1410 struct inode vfs_inode; /* the VFS's inode record */
1411 struct netfs_i_context netfs_ctx; /* Netfslib context */
1413 bool can_cache_brlcks;
1414 struct list_head llist; /* locks helb by this inode */
1416 * NOTE: Some code paths call down_read(lock_sem) twice, so
1417 * we must always use cifs_down_write() instead of down_write()
1418 * for this semaphore to avoid deadlocks.
1420 struct rw_semaphore lock_sem; /* protect the fields above */
1421 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1422 struct list_head openFileList;
1423 spinlock_t open_file_lock; /* protects openFileList */
1424 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1425 unsigned int oplock; /* oplock/lease level we have */
1426 unsigned int epoch; /* used to track lease state changes */
1427 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1428 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1429 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1430 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1431 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1432 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1433 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1434 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1435 unsigned long flags;
1436 spinlock_t writers_lock;
1437 unsigned int writers; /* Number of writers on this inode */
1438 unsigned long time; /* jiffies of last update of inode */
1439 u64 server_eof; /* current file size on server -- protected by i_lock */
1440 u64 uniqueid; /* server inode number */
1441 u64 createtime; /* creation time on server */
1442 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1443 struct list_head deferred_closes; /* list of deferred closes */
1444 spinlock_t deferred_lock; /* protection on deferred list */
1445 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1448 static inline struct cifsInodeInfo *
1449 CIFS_I(struct inode *inode)
1451 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1454 static inline struct cifs_sb_info *
1455 CIFS_SB(struct super_block *sb)
1457 return sb->s_fs_info;
1460 static inline struct cifs_sb_info *
1461 CIFS_FILE_SB(struct file *file)
1463 return CIFS_SB(file_inode(file)->i_sb);
1466 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1475 convert_delimiter(char *path, char delim)
1477 char old_delim, *pos;
1485 while ((pos = strchr(pos, old_delim)))
1489 #define cifs_stats_inc atomic_inc
1491 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1495 spin_lock(&tcon->stat_lock);
1496 tcon->bytes_written += bytes;
1497 spin_unlock(&tcon->stat_lock);
1501 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1504 spin_lock(&tcon->stat_lock);
1505 tcon->bytes_read += bytes;
1506 spin_unlock(&tcon->stat_lock);
1511 * This is the prototype for the mid receive function. This function is for
1512 * receiving the rest of the SMB frame, starting with the WordCount (which is
1513 * just after the MID in struct smb_hdr). Note:
1515 * - This will be called by cifsd, with no locks held.
1516 * - The mid will still be on the pending_mid_q.
1517 * - mid->resp_buf will point to the current buffer.
1519 * Returns zero on a successful receive, or an error. The receive state in
1520 * the TCP_Server_Info will also be updated.
1522 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1523 struct mid_q_entry *mid);
1526 * This is the prototype for the mid callback function. This is called once the
1527 * mid has been received off of the socket. When creating one, take special
1528 * care to avoid deadlocks. Things to bear in mind:
1530 * - it will be called by cifsd, with no locks held
1531 * - the mid will be removed from any lists
1533 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1536 * This is the protopyte for mid handle function. This is called once the mid
1537 * has been recognized after decryption of the message.
1539 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1540 struct mid_q_entry *mid);
1542 /* one of these for every pending CIFS request to the server */
1543 struct mid_q_entry {
1544 struct list_head qhead; /* mids waiting on reply from this server */
1545 struct kref refcount;
1546 struct TCP_Server_Info *server; /* server corresponding to this mid */
1547 __u64 mid; /* multiplex id */
1548 __u16 credits; /* number of credits consumed by this mid */
1549 __u16 credits_received; /* number of credits from the response */
1550 __u32 pid; /* process id */
1551 __u32 sequence_number; /* for CIFS signing */
1552 unsigned long when_alloc; /* when mid was created */
1553 #ifdef CONFIG_CIFS_STATS2
1554 unsigned long when_sent; /* time when smb send finished */
1555 unsigned long when_received; /* when demux complete (taken off wire) */
1557 mid_receive_t *receive; /* call receive callback */
1558 mid_callback_t *callback; /* call completion callback */
1559 mid_handle_t *handle; /* call handle mid callback */
1560 void *callback_data; /* general purpose pointer for callback */
1561 struct task_struct *creator;
1562 void *resp_buf; /* pointer to received SMB header */
1563 unsigned int resp_buf_size;
1564 int mid_state; /* wish this were enum but can not pass to wait_event */
1565 unsigned int mid_flags;
1566 __le16 command; /* smb command code */
1567 unsigned int optype; /* operation type */
1568 bool large_buf:1; /* if valid response, is pointer to large buf */
1569 bool multiRsp:1; /* multiple trans2 responses for one request */
1570 bool multiEnd:1; /* both received */
1571 bool decrypted:1; /* decrypted entry */
1574 struct close_cancelled_open {
1575 struct cifs_fid fid;
1576 struct cifs_tcon *tcon;
1577 struct work_struct work;
1582 /* Make code in transport.c a little cleaner by moving
1583 update of optional stats into function below */
1584 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1586 atomic_inc(&server->in_send);
1589 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1591 atomic_dec(&server->in_send);
1594 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1596 atomic_inc(&server->num_waiters);
1599 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1601 atomic_dec(&server->num_waiters);
1604 #ifdef CONFIG_CIFS_STATS2
1605 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1607 mid->when_sent = jiffies;
1610 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1615 /* for pending dnotify requests */
1616 struct dir_notify_req {
1617 struct list_head lhead;
1624 __u32 filter; /* CompletionFilter (for multishot) */
1629 struct dfs_info3_param {
1630 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1640 struct list_head list;
1641 struct cifsFileInfo *cfile;
1645 * common struct for holding inode info when searching for or updating an
1646 * inode with new info
1649 #define CIFS_FATTR_DFS_REFERRAL 0x1
1650 #define CIFS_FATTR_DELETE_PENDING 0x2
1651 #define CIFS_FATTR_NEED_REVAL 0x4
1652 #define CIFS_FATTR_INO_COLLISION 0x8
1653 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1654 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1667 unsigned int cf_nlink;
1668 unsigned int cf_dtype;
1669 struct timespec64 cf_atime;
1670 struct timespec64 cf_mtime;
1671 struct timespec64 cf_ctime;
1675 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1678 kfree(param->path_name);
1679 kfree(param->node_name);
1683 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1684 int number_of_items)
1687 if ((number_of_items == 0) || (param == NULL))
1689 for (i = 0; i < number_of_items; i++) {
1690 kfree(param[i].path_name);
1691 kfree(param[i].node_name);
1696 static inline bool is_interrupt_error(int error)
1701 case -ERESTARTNOHAND:
1702 case -ERESTARTNOINTR:
1708 static inline bool is_retryable_error(int error)
1710 if (is_interrupt_error(error) || error == -EAGAIN)
1716 /* cifs_get_writable_file() flags */
1717 #define FIND_WR_ANY 0
1718 #define FIND_WR_FSUID_ONLY 1
1719 #define FIND_WR_WITH_DELETE 2
1722 #define MID_REQUEST_ALLOCATED 1
1723 #define MID_REQUEST_SUBMITTED 2
1724 #define MID_RESPONSE_RECEIVED 4
1725 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1726 #define MID_RESPONSE_MALFORMED 0x10
1727 #define MID_SHUTDOWN 0x20
1730 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1731 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1733 /* Types of response buffer returned from SendReceive2 */
1734 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1735 #define CIFS_SMALL_BUFFER 1
1736 #define CIFS_LARGE_BUFFER 2
1737 #define CIFS_IOVEC 4 /* array of response buffers */
1739 /* Type of Request to SendReceive2 */
1740 #define CIFS_BLOCKING_OP 1 /* operation can block */
1741 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1742 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1743 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1744 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1745 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1747 /* Type of request operation */
1748 #define CIFS_ECHO_OP 0x080 /* echo request */
1749 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1750 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1751 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1752 /* Lower bitmask values are reserved by others below. */
1753 #define CIFS_SESS_OP 0x2000 /* session setup request */
1754 #define CIFS_OP_MASK 0x2780 /* mask request type */
1756 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1757 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1758 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1760 /* Security Flags: indicate type of session setup needed */
1761 #define CIFSSEC_MAY_SIGN 0x00001
1762 #define CIFSSEC_MAY_NTLMV2 0x00004
1763 #define CIFSSEC_MAY_KRB5 0x00008
1764 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1765 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1767 #define CIFSSEC_MUST_SIGN 0x01001
1768 /* note that only one of the following can be set so the
1769 result of setting MUST flags more than once will be to
1770 require use of the stronger protocol */
1771 #define CIFSSEC_MUST_NTLMV2 0x04004
1772 #define CIFSSEC_MUST_KRB5 0x08008
1773 #ifdef CONFIG_CIFS_UPCALL
1774 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1776 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1778 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1779 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1781 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1782 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1783 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1785 *****************************************************************
1786 * All constants go here
1787 *****************************************************************
1790 #define UID_HASH (16)
1793 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1794 * following to be declared.
1797 /****************************************************************************
1798 * Locking notes. All updates to global variables and lists should be
1799 * protected by spinlocks or semaphores.
1803 * GlobalMid_Lock protects:
1804 * list operations on pending_mid_q and oplockQ
1805 * updates to XID counters, multiplex id and SMB sequence numbers
1806 * list operations on global DnotifyReqList
1807 * updates to ses->status and TCP_Server_Info->tcpStatus
1808 * updates to server->CurrentMid
1809 * tcp_ses_lock protects:
1810 * list operations on tcp and SMB session lists
1811 * tcon->open_file_lock protects the list of open files hanging off the tcon
1812 * inode->open_file_lock protects the openFileList hanging off the inode
1813 * cfile->file_info_lock protects counters and fields in cifs file struct
1814 * f_owner.lock protects certain per file struct operations
1815 * mapping->page_lock protects certain per page operations
1817 * Note that the cifs_tcon.open_file_lock should be taken before
1818 * not after the cifsInodeInfo.open_file_lock
1822 * cifsInodeInfo->lock_sem protects:
1823 * the list of locks held by the inode
1825 ****************************************************************************/
1827 #ifdef DECLARE_GLOBALS_HERE
1828 #define GLOBAL_EXTERN
1830 #define GLOBAL_EXTERN extern
1834 * the list of TCP_Server_Info structures, ie each of the sockets
1835 * connecting our client to a distinct server (ip address), is
1836 * chained together by cifs_tcp_ses_list. The list of all our SMB
1837 * sessions (and from that the tree connections) can be found
1838 * by iterating over cifs_tcp_ses_list
1840 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1843 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1844 * tcp session, and the list of tcon's per smb session. It also protects
1845 * the reference counters for the server, smb session, and tcon. It also
1846 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1847 * changes to the tcon->tidStatus should be done while holding this lock.
1848 * generally the locks should be taken in order tcp_ses_lock before
1849 * tcon->open_file_lock and that before file->file_info_lock since the
1850 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1852 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1855 * Global transaction id (XID) information
1857 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1858 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1859 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1860 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1861 /* on midQ entries */
1863 * Global counters, updated atomically
1865 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1866 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1867 GLOBAL_EXTERN atomic_t tcpSesNextId;
1868 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1869 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1870 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1872 /* Various Debug counters */
1873 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1874 #ifdef CONFIG_CIFS_STATS2
1875 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1876 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1877 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1879 GLOBAL_EXTERN atomic_t smBufAllocCount;
1880 GLOBAL_EXTERN atomic_t midCount;
1883 extern bool enable_oplocks; /* enable or disable oplocks */
1884 extern bool lookupCacheEnabled;
1885 extern unsigned int global_secflags; /* if on, session setup sent
1886 with more secure ntlmssp2 challenge/resp */
1887 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1888 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1889 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1890 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1891 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1892 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1893 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1894 extern unsigned int cifs_min_small; /* min size of small buf pool */
1895 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1896 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1898 void cifs_oplock_break(struct work_struct *work);
1899 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1900 void smb2_deferred_work_close(struct work_struct *work);
1902 extern const struct slow_work_ops cifs_oplock_break_ops;
1903 extern struct workqueue_struct *cifsiod_wq;
1904 extern struct workqueue_struct *decrypt_wq;
1905 extern struct workqueue_struct *fileinfo_put_wq;
1906 extern struct workqueue_struct *cifsoplockd_wq;
1907 extern struct workqueue_struct *deferredclose_wq;
1908 extern __u32 cifs_lock_secret;
1910 extern mempool_t *cifs_mid_poolp;
1912 /* Operations for different SMB versions */
1913 #define SMB1_VERSION_STRING "1.0"
1914 extern struct smb_version_operations smb1_operations;
1915 extern struct smb_version_values smb1_values;
1916 #define SMB20_VERSION_STRING "2.0"
1917 extern struct smb_version_operations smb20_operations;
1918 extern struct smb_version_values smb20_values;
1919 #define SMB21_VERSION_STRING "2.1"
1920 extern struct smb_version_operations smb21_operations;
1921 extern struct smb_version_values smb21_values;
1922 #define SMBDEFAULT_VERSION_STRING "default"
1923 extern struct smb_version_values smbdefault_values;
1924 #define SMB3ANY_VERSION_STRING "3"
1925 extern struct smb_version_values smb3any_values;
1926 #define SMB30_VERSION_STRING "3.0"
1927 extern struct smb_version_operations smb30_operations;
1928 extern struct smb_version_values smb30_values;
1929 #define SMB302_VERSION_STRING "3.02"
1930 #define ALT_SMB302_VERSION_STRING "3.0.2"
1931 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1932 extern struct smb_version_values smb302_values;
1933 #define SMB311_VERSION_STRING "3.1.1"
1934 #define ALT_SMB311_VERSION_STRING "3.11"
1935 extern struct smb_version_operations smb311_operations;
1936 extern struct smb_version_values smb311_values;
1938 static inline char *get_security_type_str(enum securityEnum sectype)
1942 return "RawNTLMSSP";
1952 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1954 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
1957 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
1960 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
1961 * Subsystem Notifies That a Share Is a DFS Share.
1963 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
1964 * Application Updates a Share.
1966 if (!tcon || !tcon->ses || !tcon->ses->server)
1968 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
1969 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
1972 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
1973 const struct dfs_info3_param *ref)
1976 * Check if all targets are capable of handling DFS referrals as per
1977 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
1979 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
1982 #endif /* _CIFS_GLOB_H */