1 /* SPDX-License-Identifier: LGPL-2.1 */
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
13 #include <linux/in6.h>
14 #include <linux/inet.h>
15 #include <linux/slab.h>
16 #include <linux/mempool.h>
17 #include <linux/workqueue.h>
18 #include <linux/utsname.h>
19 #include <linux/sched/mm.h>
20 #include "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 /* smb multichannel query server interfaces interval in seconds */
83 #define SMB_INTERFACE_POLL_INTERVAL 600
85 /* maximum number of PDUs in one compound */
86 #define MAX_COMPOUND 5
89 * Default number of credits to keep available for SMB3.
90 * This value is chosen somewhat arbitrarily. The Windows client
91 * defaults to 128 credits, the Windows server allows clients up to
92 * 512 credits (or 8K for later versions), and the NetApp server
93 * does not limit clients at all. Choose a high enough default value
94 * such that the client shouldn't limit performance, but allow mount
95 * to override (until you approach 64K, where we limit credits to 65000
96 * to reduce possibility of seeing more server credit overflow bugs.
98 #define SMB2_MAX_CREDITS_AVAILABLE 32000
102 #ifndef XATTR_DOS_ATTRIB
103 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
106 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
109 * CIFS vfs client Status information (based on what we know.)
112 /* associated with each connection */
122 /* associated with each smb session */
123 enum ses_status_enum {
131 /* associated with each tree connection to the server */
132 enum tid_status_enum {
139 TID_NEED_FILES_INVALIDATE, /* currently unused */
140 TID_IN_FILES_INVALIDATE
144 Unspecified = 0, /* not specified */
145 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
146 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
147 Kerberos, /* Kerberos via SPNEGO */
155 /* crypto security descriptor definition */
157 struct shash_desc shash;
161 /* crypto hashing related structure/fields, not specific to a sec mech */
162 struct cifs_secmech {
163 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
164 struct crypto_shash *md5; /* md5 hash function */
165 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
166 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
167 struct crypto_shash *sha512; /* sha512 hash function */
168 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
169 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
170 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
171 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
172 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
173 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
174 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
177 /* per smb session structure/fields */
178 struct ntlmssp_auth {
179 bool sesskey_per_smbsess; /* whether session key is per smb session */
180 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
181 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
182 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
183 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
191 struct cifs_sid osid;
192 struct cifs_sid gsid;
193 struct cifs_ntace *ntaces;
194 struct cifs_ace *aces;
198 *****************************************************************
199 * Except the CIFS PDUs themselves all the
200 * globally interesting structs should go here
201 *****************************************************************
205 * A smb_rqst represents a complete request to be issued to a server. It's
206 * formed by a kvec array, followed by an array of pages. Page data is assumed
207 * to start at the beginning of the first page.
210 struct kvec *rq_iov; /* array of kvecs */
211 unsigned int rq_nvec; /* number of kvecs in array */
212 struct page **rq_pages; /* pointer to array of page ptrs */
213 unsigned int rq_offset; /* the offset to the 1st page */
214 unsigned int rq_npages; /* number pages in array */
215 unsigned int rq_pagesz; /* page size to use */
216 unsigned int rq_tailsz; /* length of last page */
220 struct TCP_Server_Info;
224 struct dfs_info3_param;
226 struct smb3_fs_context;
228 struct cifs_readdata;
229 struct cifs_writedata;
230 struct cifs_io_parms;
231 struct cifs_search_info;
232 struct cifsInodeInfo;
233 struct cifs_open_parms;
236 struct smb_version_operations {
237 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
238 struct mid_q_entry *);
239 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
240 /* setup request: allocate mid, sign message */
241 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
242 struct TCP_Server_Info *,
244 /* setup async request: allocate mid, sign message */
245 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
247 /* check response: verify signature, map error */
248 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
250 void (*add_credits)(struct TCP_Server_Info *server,
251 const struct cifs_credits *credits,
253 void (*set_credits)(struct TCP_Server_Info *, const int);
254 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
255 unsigned int (*get_credits)(struct mid_q_entry *);
256 __u64 (*get_next_mid)(struct TCP_Server_Info *);
257 void (*revert_current_mid)(struct TCP_Server_Info *server,
258 const unsigned int val);
259 /* data offset from read response message */
260 unsigned int (*read_data_offset)(char *);
262 * Data length from read response message
263 * When in_remaining is true, the returned data length is in
264 * message field DataRemaining for out-of-band data read (e.g through
265 * Memory Registration RDMA write in SMBD).
266 * Otherwise, the returned data length is in message field DataLength.
268 unsigned int (*read_data_length)(char *, bool in_remaining);
269 /* map smb to linux error */
270 int (*map_error)(char *, bool);
271 /* find mid corresponding to the response message */
272 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
273 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
274 void (*clear_stats)(struct cifs_tcon *);
275 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
276 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
277 /* verify the message */
278 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
279 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
280 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
281 void (*downgrade_oplock)(struct TCP_Server_Info *server,
282 struct cifsInodeInfo *cinode, __u32 oplock,
283 unsigned int epoch, bool *purge_cache);
284 /* process transaction2 response */
285 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
287 /* check if we need to negotiate */
288 bool (*need_neg)(struct TCP_Server_Info *);
289 /* negotiate to the server */
290 int (*negotiate)(const unsigned int xid,
291 struct cifs_ses *ses,
292 struct TCP_Server_Info *server);
293 /* set negotiated write size */
294 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
295 /* set negotiated read size */
296 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
297 /* setup smb sessionn */
298 int (*sess_setup)(const unsigned int, struct cifs_ses *,
299 struct TCP_Server_Info *server,
300 const struct nls_table *);
301 /* close smb session */
302 int (*logoff)(const unsigned int, struct cifs_ses *);
303 /* connect to a server share */
304 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
305 struct cifs_tcon *, const struct nls_table *);
306 /* close tree connecion */
307 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
308 /* get DFS referrals */
309 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
310 const char *, struct dfs_info3_param **,
311 unsigned int *, const struct nls_table *, int);
312 /* informational QFS call */
313 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
314 struct cifs_sb_info *);
315 /* check if a path is accessible or not */
316 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
317 struct cifs_sb_info *, const char *);
318 /* query path data from the server */
319 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
320 struct cifs_sb_info *, const char *,
321 FILE_ALL_INFO *, bool *, bool *);
322 /* query file data from the server */
323 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
324 struct cifs_fid *, FILE_ALL_INFO *);
325 /* query reparse tag from srv to determine which type of special file */
326 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
327 struct cifs_sb_info *cifs_sb, const char *path,
329 /* get server index number */
330 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
331 struct cifs_sb_info *, const char *,
332 u64 *uniqueid, FILE_ALL_INFO *);
333 /* set size by path */
334 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
335 const char *, __u64, struct cifs_sb_info *, bool);
336 /* set size by file handle */
337 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
338 struct cifsFileInfo *, __u64, bool);
340 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
342 int (*set_compression)(const unsigned int, struct cifs_tcon *,
343 struct cifsFileInfo *);
344 /* check if we can send an echo or nor */
345 bool (*can_echo)(struct TCP_Server_Info *);
346 /* send echo request */
347 int (*echo)(struct TCP_Server_Info *);
348 /* create directory */
349 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
350 umode_t mode, struct cifs_tcon *tcon,
351 const char *full_path,
352 struct cifs_sb_info *cifs_sb);
353 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
354 struct cifs_tcon *tcon, const char *name,
355 struct cifs_sb_info *sb);
356 /* set info on created directory */
357 void (*mkdir_setinfo)(struct inode *, const char *,
358 struct cifs_sb_info *, struct cifs_tcon *,
360 /* remove directory */
361 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
362 struct cifs_sb_info *);
364 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
365 struct cifs_sb_info *);
366 /* open, rename and delete file */
367 int (*rename_pending_delete)(const char *, struct dentry *,
369 /* send rename request */
370 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
371 const char *, struct cifs_sb_info *);
372 /* send create hardlink request */
373 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
374 const char *, const char *,
375 struct cifs_sb_info *);
376 /* query symlink target */
377 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
378 struct cifs_sb_info *, const char *,
380 /* open a file for non-posix mounts */
381 int (*open)(const unsigned int, struct cifs_open_parms *,
382 __u32 *, FILE_ALL_INFO *);
383 /* set fid protocol-specific info */
384 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
386 void (*close)(const unsigned int, struct cifs_tcon *,
388 /* close a file, returning file attributes and timestamps */
389 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
390 struct cifsFileInfo *pfile_info);
391 /* send a flush request to the server */
392 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
393 /* async read from the server */
394 int (*async_readv)(struct cifs_readdata *);
395 /* async write to the server */
396 int (*async_writev)(struct cifs_writedata *,
397 void (*release)(struct kref *));
398 /* sync read from the server */
399 int (*sync_read)(const unsigned int, struct cifs_fid *,
400 struct cifs_io_parms *, unsigned int *, char **,
402 /* sync write to the server */
403 int (*sync_write)(const unsigned int, struct cifs_fid *,
404 struct cifs_io_parms *, unsigned int *, struct kvec *,
406 /* open dir, start readdir */
407 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
408 const char *, struct cifs_sb_info *,
409 struct cifs_fid *, __u16,
410 struct cifs_search_info *);
411 /* continue readdir */
412 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
414 __u16, struct cifs_search_info *srch_inf);
416 int (*close_dir)(const unsigned int, struct cifs_tcon *,
418 /* calculate a size of SMB message */
419 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
420 /* check for STATUS_PENDING and process the response if yes */
421 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
422 /* check for STATUS_NETWORK_SESSION_EXPIRED */
423 bool (*is_session_expired)(char *);
424 /* send oplock break response */
425 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
426 struct cifsInodeInfo *);
427 /* query remote filesystem */
428 int (*queryfs)(const unsigned int, struct cifs_tcon *,
429 struct cifs_sb_info *, struct kstatfs *);
430 /* send mandatory brlock to the server */
431 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
432 __u64, __u32, int, int, bool);
433 /* unlock range of mandatory locks */
434 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
436 /* push brlocks from the cache to the server */
437 int (*push_mand_locks)(struct cifsFileInfo *);
438 /* get lease key of the inode */
439 void (*get_lease_key)(struct inode *, struct cifs_fid *);
440 /* set lease key of the inode */
441 void (*set_lease_key)(struct inode *, struct cifs_fid *);
442 /* generate new lease key */
443 void (*new_lease_key)(struct cifs_fid *);
444 int (*generate_signingkey)(struct cifs_ses *ses,
445 struct TCP_Server_Info *server);
446 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
447 bool allocate_crypto);
448 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
449 struct cifsFileInfo *src_file);
450 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
451 struct cifsFileInfo *src_file, void __user *);
452 int (*notify)(const unsigned int xid, struct file *pfile,
454 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
455 struct cifs_sb_info *, const unsigned char *,
456 char *, unsigned int *);
457 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
458 struct cifs_sb_info *, const unsigned char *,
459 char *, unsigned int *);
460 /* if we can do cache read operations */
461 bool (*is_read_op)(__u32);
462 /* set oplock level for the inode */
463 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
465 /* create lease context buffer for CREATE request */
466 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
467 /* parse lease context buffer and return oplock/epoch info */
468 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
469 ssize_t (*copychunk_range)(const unsigned int,
470 struct cifsFileInfo *src_file,
471 struct cifsFileInfo *target_file,
472 u64 src_off, u64 len, u64 dest_off);
473 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
474 struct cifsFileInfo *target_file, u64 src_off, u64 len,
476 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
477 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
478 const unsigned char *, const unsigned char *, char *,
479 size_t, struct cifs_sb_info *);
480 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
481 const char *, const void *, const __u16,
482 const struct nls_table *, struct cifs_sb_info *);
483 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
484 const char *, u32 *, u32);
485 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
486 const struct cifs_fid *, u32 *, u32);
487 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
489 /* writepages retry size */
490 unsigned int (*wp_retry_size)(struct inode *);
491 /* get mtu credits */
492 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
493 unsigned int *, struct cifs_credits *);
494 /* adjust previously taken mtu credits to request size */
495 int (*adjust_credits)(struct TCP_Server_Info *server,
496 struct cifs_credits *credits,
497 const unsigned int payload_size);
498 /* check if we need to issue closedir */
499 bool (*dir_needs_close)(struct cifsFileInfo *);
500 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
502 /* init transform request - used for encryption for now */
503 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
504 struct smb_rqst *, struct smb_rqst *);
505 int (*is_transform_hdr)(void *buf);
506 int (*receive_transform)(struct TCP_Server_Info *,
507 struct mid_q_entry **, char **, int *);
508 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
510 int (*next_header)(char *);
511 /* ioctl passthrough for query_info */
512 int (*ioctl_query_info)(const unsigned int xid,
513 struct cifs_tcon *tcon,
514 struct cifs_sb_info *cifs_sb,
515 __le16 *path, int is_dir,
517 /* make unix special files (block, char, fifo, socket) */
518 int (*make_node)(unsigned int xid,
520 struct dentry *dentry,
521 struct cifs_tcon *tcon,
522 const char *full_path,
524 dev_t device_number);
525 /* version specific fiemap implementation */
526 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
527 struct fiemap_extent_info *, u64, u64);
528 /* version specific llseek implementation */
529 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
530 /* Check for STATUS_IO_TIMEOUT */
531 bool (*is_status_io_timeout)(char *buf);
532 /* Check for STATUS_NETWORK_NAME_DELETED */
533 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
536 struct smb_version_values {
537 char *version_string;
539 __u32 req_capabilities;
540 __u32 large_lock_type;
541 __u32 exclusive_lock_type;
542 __u32 shared_lock_type;
543 __u32 unlock_lock_type;
544 size_t header_preamble_size;
546 size_t max_header_size;
547 size_t read_rsp_size;
549 unsigned int cap_unix;
550 unsigned int cap_nt_find;
551 unsigned int cap_large_files;
552 __u16 signing_enabled;
553 __u16 signing_required;
554 size_t create_lease_size;
557 #define HEADER_SIZE(server) (server->vals->header_size)
558 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
561 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
562 * trying to reuse existing superblock for a new mount
564 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
565 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
566 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
567 CIFS_MOUNT_MAP_SFM_CHR | \
568 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
569 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
570 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
571 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
572 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
573 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
574 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
575 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
576 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
577 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
580 * Generic VFS superblock mount flags (s_flags) to consider when
581 * trying to reuse existing superblock for a new mount
583 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
584 SB_NODEV | SB_SYNCHRONOUS)
586 struct cifs_mnt_data {
587 struct cifs_sb_info *cifs_sb;
588 struct smb3_fs_context *ctx;
592 static inline unsigned int
593 get_rfc1002_length(void *buf)
595 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
599 inc_rfc1001_len(void *buf, int count)
601 be32_add_cpu((__be32 *)buf, count);
604 struct TCP_Server_Info {
605 struct list_head tcp_ses_list;
606 struct list_head smb_ses_list;
607 __u64 conn_id; /* connection identifier (useful for debugging) */
608 int srv_count; /* reference counter */
609 /* 15 character server name + 0x20 16th byte indicating type = srv */
610 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
611 struct smb_version_operations *ops;
612 struct smb_version_values *vals;
613 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
614 enum statusEnum tcpStatus; /* what we think the status is */
615 char *hostname; /* hostname portion of UNC string */
616 struct socket *ssocket;
617 struct sockaddr_storage dstaddr;
618 struct sockaddr_storage srcaddr; /* locally bind to this IP */
622 wait_queue_head_t response_q;
623 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
624 struct list_head pending_mid_q;
625 bool noblocksnd; /* use blocking sendmsg */
626 bool noautotune; /* do not autotune send buf sizes */
629 unsigned int credits; /* send no more requests at once */
630 unsigned int max_credits; /* can override large 32000 default at mnt */
631 unsigned int in_flight; /* number of requests on the wire to server */
632 unsigned int max_in_flight; /* max number of requests that were on wire */
633 spinlock_t req_lock; /* protect the two values above */
634 struct mutex _srv_mutex;
635 unsigned int nofs_flag;
636 struct task_struct *tsk;
637 char server_GUID[16];
639 bool sign; /* is signing enabled on this connection? */
640 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
641 bool session_estab; /* mark when very first sess is established */
642 int echo_credits; /* echo reserved slots */
643 int oplock_credits; /* oplock break reserved slots */
644 bool echoes:1; /* enable echoes */
645 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
646 u16 dialect; /* dialect index that server chose */
647 bool oplocks:1; /* enable oplocks */
648 unsigned int maxReq; /* Clients should submit no more */
649 /* than maxReq distinct unanswered SMBs to the server when using */
650 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
651 unsigned int maxBuf; /* maxBuf specifies the maximum */
652 /* message size the server can send or receive for non-raw SMBs */
653 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
654 /* when socket is setup (and during reconnect) before NegProt sent */
655 unsigned int max_rw; /* maxRw specifies the maximum */
656 /* message size the server can send or receive for */
657 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
658 unsigned int capabilities; /* selective disabling of caps by smb sess */
659 int timeAdj; /* Adjust for difference in server time zone in sec */
660 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
661 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
662 /* 16th byte of RFC1001 workstation name is always null */
663 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
664 __u32 sequence_number; /* for signing, protected by srv_mutex */
665 __u32 reconnect_instance; /* incremented on each reconnect */
666 struct session_key session_key;
667 unsigned long lstrp; /* when we got last response from this server */
668 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
669 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
670 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
671 char negflavor; /* NEGOTIATE response flavor */
672 /* extended security flavors that server supports */
673 bool sec_ntlmssp; /* supports NTLMSSP */
674 bool sec_kerberosu2u; /* supports U2U Kerberos */
675 bool sec_kerberos; /* supports plain Kerberos */
676 bool sec_mskerberos; /* supports legacy MS Kerberos */
677 bool large_buf; /* is current buffer large? */
678 /* use SMBD connection instead of socket */
680 /* point to the SMBD connection if RDMA is used instead of socket */
681 struct smbd_connection *smbd_conn;
682 struct delayed_work echo; /* echo ping workqueue job */
683 struct delayed_work resolve; /* dns resolution workqueue job */
684 char *smallbuf; /* pointer to current "small" buffer */
685 char *bigbuf; /* pointer to current "big" buffer */
686 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
687 unsigned int pdu_size;
688 unsigned int total_read; /* total amount of data read in this pass */
689 atomic_t in_send; /* requests trying to send */
690 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
691 #ifdef CONFIG_CIFS_FSCACHE
692 struct fscache_cookie *fscache; /* client index cache cookie */
694 #ifdef CONFIG_CIFS_STATS2
695 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
696 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
697 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
698 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
699 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
701 unsigned int max_read;
702 unsigned int max_write;
703 unsigned int min_offload;
704 __le16 compress_algorithm;
705 __u16 signing_algorithm;
707 /* save initital negprot hash */
708 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
709 bool signing_negotiated; /* true if valid signing context rcvd from server */
710 bool posix_ext_supported;
711 struct delayed_work reconnect; /* reconnect workqueue job */
712 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
713 unsigned long echo_interval;
716 * Number of targets available for reconnect. The more targets
717 * the more tasks have to wait to let the demultiplex thread
721 bool noblockcnt; /* use non-blocking connect() */
724 * If this is a session channel,
725 * primary_server holds the ref-counted
726 * pointer to primary channel connection for the session.
728 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
729 struct TCP_Server_Info *primary_server;
731 #ifdef CONFIG_CIFS_SWN_UPCALL
732 bool use_swn_dstaddr;
733 struct sockaddr_storage swn_dstaddr;
735 #ifdef CONFIG_CIFS_DFS_UPCALL
736 bool is_dfs_conn; /* if a dfs connection */
737 struct mutex refpath_lock; /* protects leaf_fullpath */
739 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
741 * origin_fullpath: first or original referral path
742 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
744 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
745 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
747 * format: \\HOST\SHARE\[OPTIONAL PATH]
749 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
753 static inline void cifs_server_lock(struct TCP_Server_Info *server)
755 unsigned int nofs_flag = memalloc_nofs_save();
757 mutex_lock(&server->_srv_mutex);
758 server->nofs_flag = nofs_flag;
761 static inline void cifs_server_unlock(struct TCP_Server_Info *server)
763 unsigned int nofs_flag = server->nofs_flag;
765 mutex_unlock(&server->_srv_mutex);
766 memalloc_nofs_restore(nofs_flag);
769 struct cifs_credits {
771 unsigned int instance;
774 static inline unsigned int
775 in_flight(struct TCP_Server_Info *server)
778 spin_lock(&server->req_lock);
779 num = server->in_flight;
780 spin_unlock(&server->req_lock);
785 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
788 spin_lock(&server->req_lock);
790 spin_unlock(&server->req_lock);
791 return num >= num_credits;
795 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
798 server->ops->add_credits(server, credits, optype);
802 add_credits_and_wake_if(struct TCP_Server_Info *server,
803 const struct cifs_credits *credits, const int optype)
805 if (credits->value) {
806 server->ops->add_credits(server, credits, optype);
807 wake_up(&server->request_q);
812 set_credits(struct TCP_Server_Info *server, const int val)
814 server->ops->set_credits(server, val);
818 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
819 const unsigned int payload_size)
821 return server->ops->adjust_credits ?
822 server->ops->adjust_credits(server, credits, payload_size) : 0;
826 get_next_mid64(struct TCP_Server_Info *server)
828 return cpu_to_le64(server->ops->get_next_mid(server));
832 get_next_mid(struct TCP_Server_Info *server)
834 __u16 mid = server->ops->get_next_mid(server);
836 * The value in the SMB header should be little endian for easy
837 * on-the-wire decoding.
839 return cpu_to_le16(mid);
843 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
845 if (server->ops->revert_current_mid)
846 server->ops->revert_current_mid(server, val);
850 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
851 const struct smb2_hdr *shdr)
853 unsigned int num = le16_to_cpu(shdr->CreditCharge);
855 return revert_current_mid(server, num > 0 ? num : 1);
859 get_mid(const struct smb_hdr *smb)
861 return le16_to_cpu(smb->Mid);
865 compare_mid(__u16 mid, const struct smb_hdr *smb)
867 return mid == le16_to_cpu(smb->Mid);
871 * When the server supports very large reads and writes via POSIX extensions,
872 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
873 * including the RFC1001 length.
875 * Note that this might make for "interesting" allocation problems during
876 * writeback however as we have to allocate an array of pointers for the
877 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
879 * For reads, there is a similar problem as we need to allocate an array
880 * of kvecs to handle the receive, though that should only need to be done
883 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
884 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
887 * When the server doesn't allow large posix writes, only allow a rsize/wsize
888 * of 2^17-1 minus the size of the call header. That allows for a read or
889 * write up to the maximum size described by RFC1002.
891 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
892 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
894 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
897 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
898 * those values when posix extensions aren't in force. In actuality here, we
899 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
900 * to be ok with the extra byte even though Windows doesn't send writes that
905 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
907 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
908 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
911 * Macros to allow the TCP_Server_Info->net field and related code to drop out
912 * when CONFIG_NET_NS isn't set.
917 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
922 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
929 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
934 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
940 struct cifs_server_iface {
941 struct list_head iface_head;
942 struct kref refcount;
944 unsigned int rdma_capable : 1;
945 unsigned int rss_capable : 1;
946 unsigned int is_active : 1; /* unset if non existent */
947 struct sockaddr_storage sockaddr;
950 /* release iface when last ref is dropped */
952 release_iface(struct kref *ref)
954 struct cifs_server_iface *iface = container_of(ref,
955 struct cifs_server_iface,
957 list_del_init(&iface->iface_head);
962 * compare two interfaces a and b
963 * return 0 if everything matches.
964 * return 1 if a has higher link speed, or rdma capable, or rss capable
965 * return -1 otherwise.
968 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
973 if (a->speed == b->speed) {
974 if (a->rdma_capable == b->rdma_capable) {
975 if (a->rss_capable == b->rss_capable) {
976 cmp_ret = memcmp(&a->sockaddr, &b->sockaddr,
977 sizeof(a->sockaddr));
980 else if (cmp_ret > 0)
984 } else if (a->rss_capable > b->rss_capable)
988 } else if (a->rdma_capable > b->rdma_capable)
992 } else if (a->speed > b->speed)
999 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
1000 struct TCP_Server_Info *server;
1001 struct cifs_server_iface *iface; /* interface in use */
1002 __u8 signkey[SMB3_SIGN_KEY_SIZE];
1006 * Session structure. One of these for each uid session with a particular host
1009 struct list_head smb_ses_list;
1010 struct list_head rlist; /* reconnect list */
1011 struct list_head tcon_list;
1012 struct cifs_tcon *tcon_ipc;
1013 struct mutex session_mutex;
1014 struct TCP_Server_Info *server; /* pointer to server info */
1015 int ses_count; /* reference counter */
1016 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
1017 unsigned overrideSecFlg; /* if non-zero override global sec flags */
1018 char *serverOS; /* name of operating system underlying server */
1019 char *serverNOS; /* name of network operating system of server */
1020 char *serverDomain; /* security realm of server */
1021 __u64 Suid; /* remote smb uid */
1022 kuid_t linux_uid; /* overriding owner of files on the mount */
1023 kuid_t cred_uid; /* owner of credentials */
1024 unsigned int capabilities;
1025 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
1026 char *user_name; /* must not be null except during init of sess
1027 and after mount option parsing we fill it */
1030 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
1031 struct session_key auth_key;
1032 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
1033 enum securityEnum sectype; /* what security flavor was specified? */
1034 bool sign; /* is signing required? */
1036 __u16 session_flags;
1037 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
1038 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
1039 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
1040 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1043 * Network interfaces available on the server this session is
1046 * Other channels can be opened by connecting and binding this
1047 * session to interfaces from this list.
1049 * iface_lock should be taken when accessing any of these fields
1051 spinlock_t iface_lock;
1052 /* ========= begin: protected by iface_lock ======== */
1053 struct list_head iface_list;
1055 unsigned long iface_last_update; /* jiffies */
1056 /* ========= end: protected by iface_lock ======== */
1058 spinlock_t chan_lock;
1059 /* ========= begin: protected by chan_lock ======== */
1060 #define CIFS_MAX_CHANNELS 16
1061 #define CIFS_ALL_CHANNELS_SET(ses) \
1062 ((1UL << (ses)->chan_count) - 1)
1063 #define CIFS_ALL_CHANS_GOOD(ses) \
1064 (!(ses)->chans_need_reconnect)
1065 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
1066 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
1067 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
1068 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
1069 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
1070 test_bit((index), &(ses)->chans_need_reconnect)
1071 #define CIFS_CHAN_IN_RECONNECT(ses, index) \
1072 ((ses)->chans[(index)].in_reconnect)
1074 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1077 atomic_t chan_seq; /* round robin state */
1080 * chans_need_reconnect is a bitmap indicating which of the channels
1081 * under this smb session needs to be reconnected.
1082 * If not multichannel session, only one bit will be used.
1084 * We will ask for sess and tcon reconnection only if all the
1085 * channels are marked for needing reconnection. This will
1086 * enable the sessions on top to continue to live till any
1087 * of the channels below are active.
1089 unsigned long chans_need_reconnect;
1090 /* ========= end: protected by chan_lock ======== */
1094 cap_unix(struct cifs_ses *ses)
1096 return ses->server->vals->cap_unix & ses->capabilities;
1100 * common struct for holding inode info when searching for or updating an
1101 * inode with new info
1104 #define CIFS_FATTR_DFS_REFERRAL 0x1
1105 #define CIFS_FATTR_DELETE_PENDING 0x2
1106 #define CIFS_FATTR_NEED_REVAL 0x4
1107 #define CIFS_FATTR_INO_COLLISION 0x8
1108 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1109 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1122 unsigned int cf_nlink;
1123 unsigned int cf_dtype;
1124 struct timespec64 cf_atime;
1125 struct timespec64 cf_mtime;
1126 struct timespec64 cf_ctime;
1130 struct cached_dirent {
1131 struct list_head entry;
1136 struct cifs_fattr fattr;
1139 struct cached_dirents {
1142 struct dir_context *ctx; /*
1143 * Only used to make sure we only take entries
1144 * from a single context. Never dereferenced.
1146 struct mutex de_mutex;
1147 int pos; /* Expected ctx->pos */
1148 struct list_head entries;
1152 bool is_valid:1; /* Do we have a useable root fid */
1153 bool file_all_info_is_valid:1;
1155 unsigned long time; /* jiffies of when lease was taken */
1156 struct kref refcount;
1157 struct cifs_fid *fid;
1158 struct mutex fid_mutex;
1159 struct cifs_tcon *tcon;
1160 struct dentry *dentry;
1161 struct work_struct lease_break;
1162 struct smb2_file_all_info file_all_info;
1163 struct cached_dirents dirents;
1167 * there is one of these for each connection to a resource on a particular
1171 struct list_head tcon_list;
1173 struct list_head rlist; /* reconnect list */
1174 atomic_t num_local_opens; /* num of all opens including disconnected */
1175 atomic_t num_remote_opens; /* num of all network opens on server */
1176 struct list_head openFileList;
1177 spinlock_t open_file_lock; /* protects list above */
1178 struct cifs_ses *ses; /* pointer to session associated with */
1179 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1180 char *nativeFileSystem;
1181 char *password; /* for share-level security */
1182 __u32 tid; /* The 4 byte tree id */
1183 __u16 Flags; /* optional support bits */
1184 enum tid_status_enum status;
1185 atomic_t num_smbs_sent;
1188 atomic_t num_writes;
1190 atomic_t num_flushes;
1191 atomic_t num_oplock_brks;
1193 atomic_t num_closes;
1194 atomic_t num_deletes;
1195 atomic_t num_mkdirs;
1196 atomic_t num_posixopens;
1197 atomic_t num_posixmkdirs;
1198 atomic_t num_rmdirs;
1199 atomic_t num_renames;
1200 atomic_t num_t2renames;
1201 atomic_t num_ffirst;
1203 atomic_t num_fclose;
1204 atomic_t num_hardlinks;
1205 atomic_t num_symlinks;
1207 atomic_t num_acl_get;
1208 atomic_t num_acl_set;
1211 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1212 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1216 __u64 bytes_written;
1217 spinlock_t stat_lock; /* protects the two fields above */
1218 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1219 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1220 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1221 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1222 bool pipe:1; /* set if connection to pipe share */
1223 bool print:1; /* set if connection to printer share */
1226 bool nohandlecache:1; /* if strange server resource prob can turn off */
1228 bool seal:1; /* transport encryption for this mounted share */
1229 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1230 for this mount even if server would support */
1231 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1232 bool local_lease:1; /* check leases (only) on local system not remote */
1233 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1234 bool broken_sparse_sup; /* if server or share does not support sparse */
1235 bool need_reconnect:1; /* connection reset, tid now invalid */
1236 bool need_reopen_files:1; /* need to reopen tcon file handles */
1237 bool use_resilient:1; /* use resilient instead of durable handles */
1238 bool use_persistent:1; /* use persistent instead of durable handles */
1239 bool no_lease:1; /* Do not request leases on files or directories */
1240 bool use_witness:1; /* use witness protocol */
1241 __le32 capabilities;
1243 __u32 maximal_access;
1244 __u32 vol_serial_number;
1245 __le64 vol_create_time;
1246 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1247 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1248 __u32 ss_flags; /* sector size flags */
1249 __u32 perf_sector_size; /* best sector size for perf */
1251 __u32 max_bytes_chunk;
1252 __u32 max_bytes_copy;
1253 #ifdef CONFIG_CIFS_FSCACHE
1254 u64 resource_id; /* server resource id */
1255 struct fscache_cookie *fscache; /* cookie for share */
1257 struct list_head pending_opens; /* list of incomplete opens */
1258 struct cached_fid crfid; /* Cached root fid */
1259 /* BB add field for back pointer to sb struct(s)? */
1260 #ifdef CONFIG_CIFS_DFS_UPCALL
1261 struct list_head ulist; /* cache update list */
1263 struct delayed_work query_interfaces; /* query interfaces workqueue job */
1267 * This is a refcounted and timestamped container for a tcon pointer. The
1268 * container holds a tcon reference. It is considered safe to free one of
1269 * these when the tl_count goes to 0. The tl_time is the time of the last
1270 * "get" on the container.
1273 struct rb_node tl_rbnode;
1275 unsigned long tl_flags;
1276 #define TCON_LINK_MASTER 0
1277 #define TCON_LINK_PENDING 1
1278 #define TCON_LINK_IN_TREE 2
1279 unsigned long tl_time;
1281 struct cifs_tcon *tl_tcon;
1284 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1285 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1287 static inline struct cifs_tcon *
1288 tlink_tcon(struct tcon_link *tlink)
1290 return tlink->tl_tcon;
1293 static inline struct tcon_link *
1294 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1296 return cifs_sb->master_tlink;
1299 extern void cifs_put_tlink(struct tcon_link *tlink);
1301 static inline struct tcon_link *
1302 cifs_get_tlink(struct tcon_link *tlink)
1304 if (tlink && !IS_ERR(tlink))
1305 atomic_inc(&tlink->tl_count);
1309 /* This function is always expected to succeed */
1310 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1312 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1314 struct cifs_pending_open {
1315 struct list_head olist;
1316 struct tcon_link *tlink;
1321 struct cifs_deferred_close {
1322 struct list_head dlist;
1323 struct tcon_link *tlink;
1325 __u64 persistent_fid;
1330 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1331 * This is used to track byte stream locks on the file
1333 struct cifsLockInfo {
1334 struct list_head llist; /* pointer to next cifsLockInfo */
1335 struct list_head blist; /* pointer to locks blocked on this */
1336 wait_queue_head_t block_q;
1345 * One of these for each open instance of a file
1347 struct cifs_search_info {
1348 loff_t index_of_last_entry;
1349 __u16 entries_in_buffer;
1352 char *ntwrk_buf_start;
1353 char *srch_entries_start;
1355 const char *presume_name;
1356 unsigned int resume_name_len;
1360 bool smallBuf:1; /* so we know which buf_release function to call */
1363 #define ACL_NO_MODE ((umode_t)(-1))
1364 struct cifs_open_parms {
1365 struct cifs_tcon *tcon;
1366 struct cifs_sb_info *cifs_sb;
1371 struct cifs_fid *fid;
1378 __u64 persistent_fid; /* persist file id for smb2 */
1379 __u64 volatile_fid; /* volatile file id for smb2 */
1380 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1381 __u8 create_guid[16];
1383 struct cifs_pending_open *pending_open;
1385 #ifdef CONFIG_CIFS_DEBUG2
1387 #endif /* CIFS_DEBUG2 */
1391 struct cifs_fid_locks {
1392 struct list_head llist;
1393 struct cifsFileInfo *cfile; /* fid that owns locks */
1394 struct list_head locks; /* locks held by fid above */
1397 struct cifsFileInfo {
1398 /* following two lists are protected by tcon->open_file_lock */
1399 struct list_head tlist; /* pointer to next fid owned by tcon */
1400 struct list_head flist; /* next fid (file instance) for this inode */
1401 /* lock list below protected by cifsi->lock_sem */
1402 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1403 kuid_t uid; /* allows finding which FileInfo structure */
1404 __u32 pid; /* process id who opened file */
1405 struct cifs_fid fid; /* file id from remote */
1406 struct list_head rlist; /* reconnect list */
1407 /* BB add lock scope info here if needed */ ;
1408 /* lock scope id (0 if none) */
1409 struct dentry *dentry;
1410 struct tcon_link *tlink;
1411 unsigned int f_flags;
1412 bool invalidHandle:1; /* file closed via session abend */
1414 bool oplock_break_cancelled:1;
1415 unsigned int oplock_epoch; /* epoch from the lease break */
1416 __u32 oplock_level; /* oplock/lease level from the lease break */
1418 spinlock_t file_info_lock; /* protects four flag/count fields above */
1419 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1420 struct cifs_search_info srch_inf;
1421 struct work_struct oplock_break; /* work for oplock breaks */
1422 struct work_struct put; /* work for the final part of _put */
1423 struct delayed_work deferred;
1424 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1427 struct cifs_io_parms {
1429 __u64 persistent_fid; /* persist file id for smb2 */
1430 __u64 volatile_fid; /* volatile file id for smb2 */
1433 unsigned int length;
1434 struct cifs_tcon *tcon;
1435 struct TCP_Server_Info *server;
1438 struct cifs_aio_ctx {
1439 struct kref refcount;
1440 struct list_head list;
1441 struct mutex aio_mutex;
1442 struct completion done;
1443 struct iov_iter iter;
1445 struct cifsFileInfo *cfile;
1448 unsigned int npages;
1451 unsigned int total_len;
1454 * Indicates if this aio_ctx is for direct_io,
1455 * If yes, iter is a copy of the user passed iov_iter
1460 /* asynchronous read support */
1461 struct cifs_readdata {
1462 struct kref refcount;
1463 struct list_head list;
1464 struct completion done;
1465 struct cifsFileInfo *cfile;
1466 struct address_space *mapping;
1467 struct cifs_aio_ctx *ctx;
1470 unsigned int got_bytes;
1473 struct work_struct work;
1474 int (*read_into_pages)(struct TCP_Server_Info *server,
1475 struct cifs_readdata *rdata,
1477 int (*copy_into_pages)(struct TCP_Server_Info *server,
1478 struct cifs_readdata *rdata,
1479 struct iov_iter *iter);
1481 struct TCP_Server_Info *server;
1482 #ifdef CONFIG_CIFS_SMB_DIRECT
1485 unsigned int pagesz;
1486 unsigned int page_offset;
1487 unsigned int tailsz;
1488 struct cifs_credits credits;
1489 unsigned int nr_pages;
1490 struct page **pages;
1493 /* asynchronous write support */
1494 struct cifs_writedata {
1495 struct kref refcount;
1496 struct list_head list;
1497 struct completion done;
1498 enum writeback_sync_modes sync_mode;
1499 struct work_struct work;
1500 struct cifsFileInfo *cfile;
1501 struct cifs_aio_ctx *ctx;
1506 struct TCP_Server_Info *server;
1507 #ifdef CONFIG_CIFS_SMB_DIRECT
1510 unsigned int pagesz;
1511 unsigned int page_offset;
1512 unsigned int tailsz;
1513 struct cifs_credits credits;
1514 unsigned int nr_pages;
1515 struct page **pages;
1519 * Take a reference on the file private data. Must be called with
1520 * cfile->file_info_lock held.
1523 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1528 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1529 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1531 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1533 #define CIFS_CACHE_READ_FLG 1
1534 #define CIFS_CACHE_HANDLE_FLG 2
1535 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1536 #define CIFS_CACHE_WRITE_FLG 4
1537 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1538 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1540 #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))
1541 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1542 #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))
1545 * One of these for each file inode
1548 struct cifsInodeInfo {
1549 bool can_cache_brlcks;
1550 struct list_head llist; /* locks helb by this inode */
1552 * NOTE: Some code paths call down_read(lock_sem) twice, so
1553 * we must always use cifs_down_write() instead of down_write()
1554 * for this semaphore to avoid deadlocks.
1556 struct rw_semaphore lock_sem; /* protect the fields above */
1557 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1558 struct list_head openFileList;
1559 spinlock_t open_file_lock; /* protects openFileList */
1560 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1561 unsigned int oplock; /* oplock/lease level we have */
1562 unsigned int epoch; /* used to track lease state changes */
1563 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1564 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1565 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1566 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1567 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1568 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1569 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1570 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1571 unsigned long flags;
1572 spinlock_t writers_lock;
1573 unsigned int writers; /* Number of writers on this inode */
1574 unsigned long time; /* jiffies of last update of inode */
1575 u64 server_eof; /* current file size on server -- protected by i_lock */
1576 u64 uniqueid; /* server inode number */
1577 u64 createtime; /* creation time on server */
1578 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1579 #ifdef CONFIG_CIFS_FSCACHE
1580 struct fscache_cookie *fscache;
1582 struct inode vfs_inode;
1583 struct list_head deferred_closes; /* list of deferred closes */
1584 spinlock_t deferred_lock; /* protection on deferred list */
1585 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1588 static inline struct cifsInodeInfo *
1589 CIFS_I(struct inode *inode)
1591 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1594 static inline struct cifs_sb_info *
1595 CIFS_SB(struct super_block *sb)
1597 return sb->s_fs_info;
1600 static inline struct cifs_sb_info *
1601 CIFS_FILE_SB(struct file *file)
1603 return CIFS_SB(file_inode(file)->i_sb);
1606 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1608 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1615 convert_delimiter(char *path, char delim)
1617 char old_delim, *pos;
1625 while ((pos = strchr(pos, old_delim)))
1629 #define cifs_stats_inc atomic_inc
1631 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1635 spin_lock(&tcon->stat_lock);
1636 tcon->bytes_written += bytes;
1637 spin_unlock(&tcon->stat_lock);
1641 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1644 spin_lock(&tcon->stat_lock);
1645 tcon->bytes_read += bytes;
1646 spin_unlock(&tcon->stat_lock);
1651 * This is the prototype for the mid receive function. This function is for
1652 * receiving the rest of the SMB frame, starting with the WordCount (which is
1653 * just after the MID in struct smb_hdr). Note:
1655 * - This will be called by cifsd, with no locks held.
1656 * - The mid will still be on the pending_mid_q.
1657 * - mid->resp_buf will point to the current buffer.
1659 * Returns zero on a successful receive, or an error. The receive state in
1660 * the TCP_Server_Info will also be updated.
1662 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1663 struct mid_q_entry *mid);
1666 * This is the prototype for the mid callback function. This is called once the
1667 * mid has been received off of the socket. When creating one, take special
1668 * care to avoid deadlocks. Things to bear in mind:
1670 * - it will be called by cifsd, with no locks held
1671 * - the mid will be removed from any lists
1673 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1676 * This is the protopyte for mid handle function. This is called once the mid
1677 * has been recognized after decryption of the message.
1679 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1680 struct mid_q_entry *mid);
1682 /* one of these for every pending CIFS request to the server */
1683 struct mid_q_entry {
1684 struct list_head qhead; /* mids waiting on reply from this server */
1685 struct kref refcount;
1686 struct TCP_Server_Info *server; /* server corresponding to this mid */
1687 __u64 mid; /* multiplex id */
1688 __u16 credits; /* number of credits consumed by this mid */
1689 __u16 credits_received; /* number of credits from the response */
1690 __u32 pid; /* process id */
1691 __u32 sequence_number; /* for CIFS signing */
1692 unsigned long when_alloc; /* when mid was created */
1693 #ifdef CONFIG_CIFS_STATS2
1694 unsigned long when_sent; /* time when smb send finished */
1695 unsigned long when_received; /* when demux complete (taken off wire) */
1697 mid_receive_t *receive; /* call receive callback */
1698 mid_callback_t *callback; /* call completion callback */
1699 mid_handle_t *handle; /* call handle mid callback */
1700 void *callback_data; /* general purpose pointer for callback */
1701 struct task_struct *creator;
1702 void *resp_buf; /* pointer to received SMB header */
1703 unsigned int resp_buf_size;
1704 int mid_state; /* wish this were enum but can not pass to wait_event */
1705 unsigned int mid_flags;
1706 __le16 command; /* smb command code */
1707 unsigned int optype; /* operation type */
1708 bool large_buf:1; /* if valid response, is pointer to large buf */
1709 bool multiRsp:1; /* multiple trans2 responses for one request */
1710 bool multiEnd:1; /* both received */
1711 bool decrypted:1; /* decrypted entry */
1714 struct close_cancelled_open {
1715 struct cifs_fid fid;
1716 struct cifs_tcon *tcon;
1717 struct work_struct work;
1722 /* Make code in transport.c a little cleaner by moving
1723 update of optional stats into function below */
1724 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1726 atomic_inc(&server->in_send);
1729 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1731 atomic_dec(&server->in_send);
1734 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1736 atomic_inc(&server->num_waiters);
1739 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1741 atomic_dec(&server->num_waiters);
1744 #ifdef CONFIG_CIFS_STATS2
1745 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1747 mid->when_sent = jiffies;
1750 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1755 /* for pending dnotify requests */
1756 struct dir_notify_req {
1757 struct list_head lhead;
1764 __u32 filter; /* CompletionFilter (for multishot) */
1769 struct dfs_info3_param {
1770 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1780 struct list_head list;
1781 struct cifsFileInfo *cfile;
1784 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1787 kfree(param->path_name);
1788 kfree(param->node_name);
1792 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1793 int number_of_items)
1796 if ((number_of_items == 0) || (param == NULL))
1798 for (i = 0; i < number_of_items; i++) {
1799 kfree(param[i].path_name);
1800 kfree(param[i].node_name);
1805 static inline bool is_interrupt_error(int error)
1810 case -ERESTARTNOHAND:
1811 case -ERESTARTNOINTR:
1817 static inline bool is_retryable_error(int error)
1819 if (is_interrupt_error(error) || error == -EAGAIN)
1825 /* cifs_get_writable_file() flags */
1826 #define FIND_WR_ANY 0
1827 #define FIND_WR_FSUID_ONLY 1
1828 #define FIND_WR_WITH_DELETE 2
1831 #define MID_REQUEST_ALLOCATED 1
1832 #define MID_REQUEST_SUBMITTED 2
1833 #define MID_RESPONSE_RECEIVED 4
1834 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1835 #define MID_RESPONSE_MALFORMED 0x10
1836 #define MID_SHUTDOWN 0x20
1839 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1840 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1842 /* Types of response buffer returned from SendReceive2 */
1843 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1844 #define CIFS_SMALL_BUFFER 1
1845 #define CIFS_LARGE_BUFFER 2
1846 #define CIFS_IOVEC 4 /* array of response buffers */
1848 /* Type of Request to SendReceive2 */
1849 #define CIFS_BLOCKING_OP 1 /* operation can block */
1850 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1851 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1852 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1853 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1854 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1856 /* Type of request operation */
1857 #define CIFS_ECHO_OP 0x080 /* echo request */
1858 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1859 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1860 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1861 /* Lower bitmask values are reserved by others below. */
1862 #define CIFS_SESS_OP 0x2000 /* session setup request */
1863 #define CIFS_OP_MASK 0x2780 /* mask request type */
1865 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1866 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1867 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1869 /* Security Flags: indicate type of session setup needed */
1870 #define CIFSSEC_MAY_SIGN 0x00001
1871 #define CIFSSEC_MAY_NTLMV2 0x00004
1872 #define CIFSSEC_MAY_KRB5 0x00008
1873 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1874 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1876 #define CIFSSEC_MUST_SIGN 0x01001
1877 /* note that only one of the following can be set so the
1878 result of setting MUST flags more than once will be to
1879 require use of the stronger protocol */
1880 #define CIFSSEC_MUST_NTLMV2 0x04004
1881 #define CIFSSEC_MUST_KRB5 0x08008
1882 #ifdef CONFIG_CIFS_UPCALL
1883 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1885 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1887 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1888 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1890 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1891 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1892 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1894 *****************************************************************
1895 * All constants go here
1896 *****************************************************************
1899 #define UID_HASH (16)
1902 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1903 * following to be declared.
1906 /****************************************************************************
1907 * Locking notes. All updates to global variables and lists should be
1908 * protected by spinlocks or semaphores.
1912 * GlobalMid_Lock protects:
1913 * list operations on pending_mid_q and oplockQ
1914 * updates to XID counters, multiplex id and SMB sequence numbers
1915 * list operations on global DnotifyReqList
1916 * updates to ses->status and TCP_Server_Info->tcpStatus
1917 * updates to server->CurrentMid
1918 * tcp_ses_lock protects:
1919 * list operations on tcp and SMB session lists
1920 * tcon->open_file_lock protects the list of open files hanging off the tcon
1921 * inode->open_file_lock protects the openFileList hanging off the inode
1922 * cfile->file_info_lock protects counters and fields in cifs file struct
1923 * f_owner.lock protects certain per file struct operations
1924 * mapping->page_lock protects certain per page operations
1926 * Note that the cifs_tcon.open_file_lock should be taken before
1927 * not after the cifsInodeInfo.open_file_lock
1931 * cifsInodeInfo->lock_sem protects:
1932 * the list of locks held by the inode
1934 ****************************************************************************/
1936 #ifdef DECLARE_GLOBALS_HERE
1937 #define GLOBAL_EXTERN
1939 #define GLOBAL_EXTERN extern
1943 * the list of TCP_Server_Info structures, ie each of the sockets
1944 * connecting our client to a distinct server (ip address), is
1945 * chained together by cifs_tcp_ses_list. The list of all our SMB
1946 * sessions (and from that the tree connections) can be found
1947 * by iterating over cifs_tcp_ses_list
1949 extern struct list_head cifs_tcp_ses_list;
1952 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1953 * tcp session, and the list of tcon's per smb session. It also protects
1954 * the reference counters for the server, smb session, and tcon. It also
1955 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1956 * changes to the tcon->tidStatus should be done while holding this lock.
1957 * generally the locks should be taken in order tcp_ses_lock before
1958 * tcon->open_file_lock and that before file->file_info_lock since the
1959 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1961 extern spinlock_t cifs_tcp_ses_lock;
1964 * Global transaction id (XID) information
1966 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1967 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1968 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1969 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1970 /* on midQ entries */
1972 * Global counters, updated atomically
1974 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1975 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1976 GLOBAL_EXTERN atomic_t tcpSesNextId;
1977 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1978 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1979 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1981 /* Various Debug counters */
1982 extern atomic_t buf_alloc_count; /* current number allocated */
1983 extern atomic_t small_buf_alloc_count;
1984 #ifdef CONFIG_CIFS_STATS2
1985 extern atomic_t total_buf_alloc_count; /* total allocated over all time */
1986 extern atomic_t total_small_buf_alloc_count;
1987 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1991 extern bool enable_oplocks; /* enable or disable oplocks */
1992 extern bool lookupCacheEnabled;
1993 extern unsigned int global_secflags; /* if on, session setup sent
1994 with more secure ntlmssp2 challenge/resp */
1995 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1996 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1997 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1998 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1999 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
2000 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
2001 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
2002 extern unsigned int cifs_min_small; /* min size of small buf pool */
2003 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
2004 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
2005 extern atomic_t mid_count;
2007 void cifs_oplock_break(struct work_struct *work);
2008 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
2009 void smb2_deferred_work_close(struct work_struct *work);
2011 extern const struct slow_work_ops cifs_oplock_break_ops;
2012 extern struct workqueue_struct *cifsiod_wq;
2013 extern struct workqueue_struct *decrypt_wq;
2014 extern struct workqueue_struct *fileinfo_put_wq;
2015 extern struct workqueue_struct *cifsoplockd_wq;
2016 extern struct workqueue_struct *deferredclose_wq;
2017 extern __u32 cifs_lock_secret;
2019 extern mempool_t *cifs_mid_poolp;
2021 /* Operations for different SMB versions */
2022 #define SMB1_VERSION_STRING "1.0"
2023 #define SMB20_VERSION_STRING "2.0"
2024 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2025 extern struct smb_version_operations smb1_operations;
2026 extern struct smb_version_values smb1_values;
2027 extern struct smb_version_operations smb20_operations;
2028 extern struct smb_version_values smb20_values;
2029 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
2030 #define SMB21_VERSION_STRING "2.1"
2031 extern struct smb_version_operations smb21_operations;
2032 extern struct smb_version_values smb21_values;
2033 #define SMBDEFAULT_VERSION_STRING "default"
2034 extern struct smb_version_values smbdefault_values;
2035 #define SMB3ANY_VERSION_STRING "3"
2036 extern struct smb_version_values smb3any_values;
2037 #define SMB30_VERSION_STRING "3.0"
2038 extern struct smb_version_operations smb30_operations;
2039 extern struct smb_version_values smb30_values;
2040 #define SMB302_VERSION_STRING "3.02"
2041 #define ALT_SMB302_VERSION_STRING "3.0.2"
2042 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
2043 extern struct smb_version_values smb302_values;
2044 #define SMB311_VERSION_STRING "3.1.1"
2045 #define ALT_SMB311_VERSION_STRING "3.11"
2046 extern struct smb_version_operations smb311_operations;
2047 extern struct smb_version_values smb311_values;
2049 static inline char *get_security_type_str(enum securityEnum sectype)
2053 return "RawNTLMSSP";
2063 static inline bool is_smb1_server(struct TCP_Server_Info *server)
2065 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
2068 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
2071 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
2072 * Subsystem Notifies That a Share Is a DFS Share.
2074 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
2075 * Application Updates a Share.
2077 if (!tcon || !tcon->ses || !tcon->ses->server)
2079 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
2080 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
2083 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
2084 const struct dfs_info3_param *ref)
2087 * Check if all targets are capable of handling DFS referrals as per
2088 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
2090 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
2093 static inline u64 cifs_flock_len(struct file_lock *fl)
2095 return fl->fl_end == OFFSET_MAX ? 0 : fl->fl_end - fl->fl_start + 1;
2098 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
2100 if (WARN_ON_ONCE(!ses || !ses->server))
2103 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
2104 * servers do require it during NTLMSSP.
2106 if (ses->server->dialect <= SMB20_PROT_ID)
2107 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
2108 return sizeof(ses->workstation_name);
2111 #endif /* _CIFS_GLOB_H */