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 <linux/netfs.h>
21 #include "cifs_fs_sb.h"
23 #include <crypto/internal/hash.h>
24 #include <linux/scatterlist.h>
25 #include <uapi/linux/cifs/cifs_mount.h>
26 #include "../smbfs_common/smb2pdu.h"
29 #define SMB_PATH_MAX 260
31 #define RFC1001_PORT 139
34 * The sizes of various internal tables and strings
36 #define MAX_UID_INFO 16
37 #define MAX_SES_INFO 2
38 #define MAX_TCON_INFO 4
40 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
42 #define CIFS_MIN_RCV_POOL 4
44 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
46 * default attribute cache timeout (jiffies)
48 #define CIFS_DEF_ACTIMEO (1 * HZ)
51 * max attribute cache timeout (jiffies) - 2^30
53 #define CIFS_MAX_ACTIMEO (1 << 30)
56 * Max persistent and resilient handle timeout (milliseconds).
57 * Windows durable max was 960000 (16 minutes)
59 #define SMB3_MAX_HANDLE_TIMEOUT 960000
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* maximum length of ip addr as a string (including ipv6 and sctp) */
71 #define SERVER_NAME_LENGTH 80
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* echo interval in seconds */
75 #define SMB_ECHO_INTERVAL_MIN 1
76 #define SMB_ECHO_INTERVAL_MAX 600
77 #define SMB_ECHO_INTERVAL_DEFAULT 60
79 /* dns resolution intervals in seconds */
80 #define SMB_DNS_RESOLVE_INTERVAL_MIN 120
81 #define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
83 /* smb multichannel query server interfaces interval in seconds */
84 #define SMB_INTERFACE_POLL_INTERVAL 600
86 /* maximum number of PDUs in one compound */
87 #define MAX_COMPOUND 5
90 * Default number of credits to keep available for SMB3.
91 * This value is chosen somewhat arbitrarily. The Windows client
92 * defaults to 128 credits, the Windows server allows clients up to
93 * 512 credits (or 8K for later versions), and the NetApp server
94 * does not limit clients at all. Choose a high enough default value
95 * such that the client shouldn't limit performance, but allow mount
96 * to override (until you approach 64K, where we limit credits to 65000
97 * to reduce possibility of seeing more server credit overflow bugs.
99 #define SMB2_MAX_CREDITS_AVAILABLE 32000
103 #ifndef XATTR_DOS_ATTRIB
104 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
107 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
110 * CIFS vfs client Status information (based on what we know.)
113 /* associated with each connection */
123 /* associated with each smb session */
124 enum ses_status_enum {
132 /* associated with each tree connection to the server */
133 enum tid_status_enum {
140 TID_NEED_FILES_INVALIDATE, /* currently unused */
141 TID_IN_FILES_INVALIDATE
145 Unspecified = 0, /* not specified */
146 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
147 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
148 Kerberos, /* Kerberos via SPNEGO */
156 /* crypto security descriptor definition */
158 struct shash_desc shash;
162 /* crypto hashing related structure/fields, not specific to a sec mech */
163 struct cifs_secmech {
164 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
165 struct crypto_shash *md5; /* md5 hash function */
166 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
167 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
168 struct crypto_shash *sha512; /* sha512 hash function */
169 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
170 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
171 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
172 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
173 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
174 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
175 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
178 /* per smb session structure/fields */
179 struct ntlmssp_auth {
180 bool sesskey_per_smbsess; /* whether session key is per smb session */
181 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
182 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
183 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
184 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
192 struct cifs_sid osid;
193 struct cifs_sid gsid;
194 struct cifs_ntace *ntaces;
195 struct cifs_ace *aces;
199 *****************************************************************
200 * Except the CIFS PDUs themselves all the
201 * globally interesting structs should go here
202 *****************************************************************
206 * A smb_rqst represents a complete request to be issued to a server. It's
207 * formed by a kvec array, followed by an array of pages. Page data is assumed
208 * to start at the beginning of the first page.
211 struct kvec *rq_iov; /* array of kvecs */
212 unsigned int rq_nvec; /* number of kvecs in array */
213 struct page **rq_pages; /* pointer to array of page ptrs */
214 unsigned int rq_offset; /* the offset to the 1st page */
215 unsigned int rq_npages; /* number pages in array */
216 unsigned int rq_pagesz; /* page size to use */
217 unsigned int rq_tailsz; /* length of last page */
221 struct TCP_Server_Info;
225 struct dfs_info3_param;
227 struct smb3_fs_context;
229 struct cifs_readdata;
230 struct cifs_writedata;
231 struct cifs_io_parms;
232 struct cifs_search_info;
233 struct cifsInodeInfo;
234 struct cifs_open_parms;
237 struct smb_version_operations {
238 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
239 struct mid_q_entry *);
240 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
241 /* setup request: allocate mid, sign message */
242 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
243 struct TCP_Server_Info *,
245 /* setup async request: allocate mid, sign message */
246 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
248 /* check response: verify signature, map error */
249 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
251 void (*add_credits)(struct TCP_Server_Info *server,
252 const struct cifs_credits *credits,
254 void (*set_credits)(struct TCP_Server_Info *, const int);
255 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
256 unsigned int (*get_credits)(struct mid_q_entry *);
257 __u64 (*get_next_mid)(struct TCP_Server_Info *);
258 void (*revert_current_mid)(struct TCP_Server_Info *server,
259 const unsigned int val);
260 /* data offset from read response message */
261 unsigned int (*read_data_offset)(char *);
263 * Data length from read response message
264 * When in_remaining is true, the returned data length is in
265 * message field DataRemaining for out-of-band data read (e.g through
266 * Memory Registration RDMA write in SMBD).
267 * Otherwise, the returned data length is in message field DataLength.
269 unsigned int (*read_data_length)(char *, bool in_remaining);
270 /* map smb to linux error */
271 int (*map_error)(char *, bool);
272 /* find mid corresponding to the response message */
273 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
274 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
275 void (*clear_stats)(struct cifs_tcon *);
276 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
277 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
278 /* verify the message */
279 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
280 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
281 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
282 void (*downgrade_oplock)(struct TCP_Server_Info *server,
283 struct cifsInodeInfo *cinode, __u32 oplock,
284 unsigned int epoch, bool *purge_cache);
285 /* process transaction2 response */
286 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
288 /* check if we need to negotiate */
289 bool (*need_neg)(struct TCP_Server_Info *);
290 /* negotiate to the server */
291 int (*negotiate)(const unsigned int xid,
292 struct cifs_ses *ses,
293 struct TCP_Server_Info *server);
294 /* set negotiated write size */
295 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
296 /* set negotiated read size */
297 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
298 /* setup smb sessionn */
299 int (*sess_setup)(const unsigned int, struct cifs_ses *,
300 struct TCP_Server_Info *server,
301 const struct nls_table *);
302 /* close smb session */
303 int (*logoff)(const unsigned int, struct cifs_ses *);
304 /* connect to a server share */
305 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
306 struct cifs_tcon *, const struct nls_table *);
307 /* close tree connecion */
308 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
309 /* get DFS referrals */
310 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
311 const char *, struct dfs_info3_param **,
312 unsigned int *, const struct nls_table *, int);
313 /* informational QFS call */
314 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
315 struct cifs_sb_info *);
316 /* check if a path is accessible or not */
317 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
318 struct cifs_sb_info *, const char *);
319 /* query path data from the server */
320 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
321 struct cifs_sb_info *, const char *,
322 FILE_ALL_INFO *, bool *, bool *);
323 /* query file data from the server */
324 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
325 struct cifs_fid *, FILE_ALL_INFO *);
326 /* query reparse tag from srv to determine which type of special file */
327 int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
328 struct cifs_sb_info *cifs_sb, const char *path,
330 /* get server index number */
331 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
332 struct cifs_sb_info *, const char *,
333 u64 *uniqueid, FILE_ALL_INFO *);
334 /* set size by path */
335 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
336 const char *, __u64, struct cifs_sb_info *, bool);
337 /* set size by file handle */
338 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
339 struct cifsFileInfo *, __u64, bool);
341 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
343 int (*set_compression)(const unsigned int, struct cifs_tcon *,
344 struct cifsFileInfo *);
345 /* check if we can send an echo or nor */
346 bool (*can_echo)(struct TCP_Server_Info *);
347 /* send echo request */
348 int (*echo)(struct TCP_Server_Info *);
349 /* create directory */
350 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
351 umode_t mode, struct cifs_tcon *tcon,
352 const char *full_path,
353 struct cifs_sb_info *cifs_sb);
354 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
355 struct cifs_tcon *tcon, const char *name,
356 struct cifs_sb_info *sb);
357 /* set info on created directory */
358 void (*mkdir_setinfo)(struct inode *, const char *,
359 struct cifs_sb_info *, struct cifs_tcon *,
361 /* remove directory */
362 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
363 struct cifs_sb_info *);
365 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
366 struct cifs_sb_info *);
367 /* open, rename and delete file */
368 int (*rename_pending_delete)(const char *, struct dentry *,
370 /* send rename request */
371 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
372 const char *, struct cifs_sb_info *);
373 /* send create hardlink request */
374 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
375 const char *, const char *,
376 struct cifs_sb_info *);
377 /* query symlink target */
378 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
379 struct cifs_sb_info *, const char *,
381 /* open a file for non-posix mounts */
382 int (*open)(const unsigned int, struct cifs_open_parms *,
383 __u32 *, FILE_ALL_INFO *);
384 /* set fid protocol-specific info */
385 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
387 void (*close)(const unsigned int, struct cifs_tcon *,
389 /* close a file, returning file attributes and timestamps */
390 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
391 struct cifsFileInfo *pfile_info);
392 /* send a flush request to the server */
393 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
394 /* async read from the server */
395 int (*async_readv)(struct cifs_readdata *);
396 /* async write to the server */
397 int (*async_writev)(struct cifs_writedata *,
398 void (*release)(struct kref *));
399 /* sync read from the server */
400 int (*sync_read)(const unsigned int, struct cifs_fid *,
401 struct cifs_io_parms *, unsigned int *, char **,
403 /* sync write to the server */
404 int (*sync_write)(const unsigned int, struct cifs_fid *,
405 struct cifs_io_parms *, unsigned int *, struct kvec *,
407 /* open dir, start readdir */
408 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
409 const char *, struct cifs_sb_info *,
410 struct cifs_fid *, __u16,
411 struct cifs_search_info *);
412 /* continue readdir */
413 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
415 __u16, struct cifs_search_info *srch_inf);
417 int (*close_dir)(const unsigned int, struct cifs_tcon *,
419 /* calculate a size of SMB message */
420 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
421 /* check for STATUS_PENDING and process the response if yes */
422 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
423 /* check for STATUS_NETWORK_SESSION_EXPIRED */
424 bool (*is_session_expired)(char *);
425 /* send oplock break response */
426 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
427 struct cifsInodeInfo *);
428 /* query remote filesystem */
429 int (*queryfs)(const unsigned int, struct cifs_tcon *,
430 struct cifs_sb_info *, struct kstatfs *);
431 /* send mandatory brlock to the server */
432 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
433 __u64, __u32, int, int, bool);
434 /* unlock range of mandatory locks */
435 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
437 /* push brlocks from the cache to the server */
438 int (*push_mand_locks)(struct cifsFileInfo *);
439 /* get lease key of the inode */
440 void (*get_lease_key)(struct inode *, struct cifs_fid *);
441 /* set lease key of the inode */
442 void (*set_lease_key)(struct inode *, struct cifs_fid *);
443 /* generate new lease key */
444 void (*new_lease_key)(struct cifs_fid *);
445 int (*generate_signingkey)(struct cifs_ses *ses,
446 struct TCP_Server_Info *server);
447 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
448 bool allocate_crypto);
449 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
450 struct cifsFileInfo *src_file);
451 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
452 struct cifsFileInfo *src_file, void __user *);
453 int (*notify)(const unsigned int xid, struct file *pfile,
455 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
456 struct cifs_sb_info *, const unsigned char *,
457 char *, unsigned int *);
458 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
459 struct cifs_sb_info *, const unsigned char *,
460 char *, unsigned int *);
461 /* if we can do cache read operations */
462 bool (*is_read_op)(__u32);
463 /* set oplock level for the inode */
464 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
466 /* create lease context buffer for CREATE request */
467 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
468 /* parse lease context buffer and return oplock/epoch info */
469 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
470 ssize_t (*copychunk_range)(const unsigned int,
471 struct cifsFileInfo *src_file,
472 struct cifsFileInfo *target_file,
473 u64 src_off, u64 len, u64 dest_off);
474 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
475 struct cifsFileInfo *target_file, u64 src_off, u64 len,
477 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
478 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
479 const unsigned char *, const unsigned char *, char *,
480 size_t, struct cifs_sb_info *);
481 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
482 const char *, const void *, const __u16,
483 const struct nls_table *, struct cifs_sb_info *);
484 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
485 const char *, u32 *, u32);
486 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
487 const struct cifs_fid *, u32 *, u32);
488 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
490 /* writepages retry size */
491 unsigned int (*wp_retry_size)(struct inode *);
492 /* get mtu credits */
493 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
494 unsigned int *, struct cifs_credits *);
495 /* adjust previously taken mtu credits to request size */
496 int (*adjust_credits)(struct TCP_Server_Info *server,
497 struct cifs_credits *credits,
498 const unsigned int payload_size);
499 /* check if we need to issue closedir */
500 bool (*dir_needs_close)(struct cifsFileInfo *);
501 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
503 /* init transform request - used for encryption for now */
504 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
505 struct smb_rqst *, struct smb_rqst *);
506 int (*is_transform_hdr)(void *buf);
507 int (*receive_transform)(struct TCP_Server_Info *,
508 struct mid_q_entry **, char **, int *);
509 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
511 int (*next_header)(char *);
512 /* ioctl passthrough for query_info */
513 int (*ioctl_query_info)(const unsigned int xid,
514 struct cifs_tcon *tcon,
515 struct cifs_sb_info *cifs_sb,
516 __le16 *path, int is_dir,
518 /* make unix special files (block, char, fifo, socket) */
519 int (*make_node)(unsigned int xid,
521 struct dentry *dentry,
522 struct cifs_tcon *tcon,
523 const char *full_path,
525 dev_t device_number);
526 /* version specific fiemap implementation */
527 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
528 struct fiemap_extent_info *, u64, u64);
529 /* version specific llseek implementation */
530 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
531 /* Check for STATUS_IO_TIMEOUT */
532 bool (*is_status_io_timeout)(char *buf);
533 /* Check for STATUS_NETWORK_NAME_DELETED */
534 void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
537 struct smb_version_values {
538 char *version_string;
540 __u32 req_capabilities;
541 __u32 large_lock_type;
542 __u32 exclusive_lock_type;
543 __u32 shared_lock_type;
544 __u32 unlock_lock_type;
545 size_t header_preamble_size;
547 size_t max_header_size;
548 size_t read_rsp_size;
550 unsigned int cap_unix;
551 unsigned int cap_nt_find;
552 unsigned int cap_large_files;
553 __u16 signing_enabled;
554 __u16 signing_required;
555 size_t create_lease_size;
558 #define HEADER_SIZE(server) (server->vals->header_size)
559 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
562 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
563 * trying to reuse existing superblock for a new mount
565 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
566 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
567 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
568 CIFS_MOUNT_MAP_SFM_CHR | \
569 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
570 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
571 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
572 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
573 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
574 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
575 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
576 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
577 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
578 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
581 * Generic VFS superblock mount flags (s_flags) to consider when
582 * trying to reuse existing superblock for a new mount
584 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
585 SB_NODEV | SB_SYNCHRONOUS)
587 struct cifs_mnt_data {
588 struct cifs_sb_info *cifs_sb;
589 struct smb3_fs_context *ctx;
593 static inline unsigned int
594 get_rfc1002_length(void *buf)
596 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
600 inc_rfc1001_len(void *buf, int count)
602 be32_add_cpu((__be32 *)buf, count);
605 struct TCP_Server_Info {
606 struct list_head tcp_ses_list;
607 struct list_head smb_ses_list;
608 __u64 conn_id; /* connection identifier (useful for debugging) */
609 int srv_count; /* reference counter */
610 /* 15 character server name + 0x20 16th byte indicating type = srv */
611 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
612 struct smb_version_operations *ops;
613 struct smb_version_values *vals;
614 /* updates to tcpStatus protected by cifs_tcp_ses_lock */
615 enum statusEnum tcpStatus; /* what we think the status is */
616 char *hostname; /* hostname portion of UNC string */
617 struct socket *ssocket;
618 struct sockaddr_storage dstaddr;
619 struct sockaddr_storage srcaddr; /* locally bind to this IP */
623 wait_queue_head_t response_q;
624 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
625 struct list_head pending_mid_q;
626 bool noblocksnd; /* use blocking sendmsg */
627 bool noautotune; /* do not autotune send buf sizes */
630 unsigned int credits; /* send no more requests at once */
631 unsigned int max_credits; /* can override large 32000 default at mnt */
632 unsigned int in_flight; /* number of requests on the wire to server */
633 unsigned int max_in_flight; /* max number of requests that were on wire */
634 spinlock_t req_lock; /* protect the two values above */
635 struct mutex _srv_mutex;
636 unsigned int nofs_flag;
637 struct task_struct *tsk;
638 char server_GUID[16];
640 bool sign; /* is signing enabled on this connection? */
641 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
642 bool session_estab; /* mark when very first sess is established */
643 int echo_credits; /* echo reserved slots */
644 int oplock_credits; /* oplock break reserved slots */
645 bool echoes:1; /* enable echoes */
646 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
647 u16 dialect; /* dialect index that server chose */
648 bool oplocks:1; /* enable oplocks */
649 unsigned int maxReq; /* Clients should submit no more */
650 /* than maxReq distinct unanswered SMBs to the server when using */
651 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
652 unsigned int maxBuf; /* maxBuf specifies the maximum */
653 /* message size the server can send or receive for non-raw SMBs */
654 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
655 /* when socket is setup (and during reconnect) before NegProt sent */
656 unsigned int max_rw; /* maxRw specifies the maximum */
657 /* message size the server can send or receive for */
658 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
659 unsigned int capabilities; /* selective disabling of caps by smb sess */
660 int timeAdj; /* Adjust for difference in server time zone in sec */
661 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
662 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
663 /* 16th byte of RFC1001 workstation name is always null */
664 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
665 __u32 sequence_number; /* for signing, protected by srv_mutex */
666 __u32 reconnect_instance; /* incremented on each reconnect */
667 struct session_key session_key;
668 unsigned long lstrp; /* when we got last response from this server */
669 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
670 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
671 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
672 char negflavor; /* NEGOTIATE response flavor */
673 /* extended security flavors that server supports */
674 bool sec_ntlmssp; /* supports NTLMSSP */
675 bool sec_kerberosu2u; /* supports U2U Kerberos */
676 bool sec_kerberos; /* supports plain Kerberos */
677 bool sec_mskerberos; /* supports legacy MS Kerberos */
678 bool large_buf; /* is current buffer large? */
679 /* use SMBD connection instead of socket */
681 /* point to the SMBD connection if RDMA is used instead of socket */
682 struct smbd_connection *smbd_conn;
683 struct delayed_work echo; /* echo ping workqueue job */
684 struct delayed_work resolve; /* dns resolution workqueue job */
685 char *smallbuf; /* pointer to current "small" buffer */
686 char *bigbuf; /* pointer to current "big" buffer */
687 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
688 unsigned int pdu_size;
689 unsigned int total_read; /* total amount of data read in this pass */
690 atomic_t in_send; /* requests trying to send */
691 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
692 #ifdef CONFIG_CIFS_STATS2
693 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
694 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
695 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
696 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
697 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
699 unsigned int max_read;
700 unsigned int max_write;
701 unsigned int min_offload;
702 __le16 compress_algorithm;
703 __u16 signing_algorithm;
705 /* save initital negprot hash */
706 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
707 bool signing_negotiated; /* true if valid signing context rcvd from server */
708 bool posix_ext_supported;
709 struct delayed_work reconnect; /* reconnect workqueue job */
710 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
711 unsigned long echo_interval;
714 * Number of targets available for reconnect. The more targets
715 * the more tasks have to wait to let the demultiplex thread
719 bool noblockcnt; /* use non-blocking connect() */
722 * If this is a session channel,
723 * primary_server holds the ref-counted
724 * pointer to primary channel connection for the session.
726 #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
727 struct TCP_Server_Info *primary_server;
729 #ifdef CONFIG_CIFS_SWN_UPCALL
730 bool use_swn_dstaddr;
731 struct sockaddr_storage swn_dstaddr;
733 #ifdef CONFIG_CIFS_DFS_UPCALL
734 bool is_dfs_conn; /* if a dfs connection */
735 struct mutex refpath_lock; /* protects leaf_fullpath */
737 * Canonical DFS full paths that were used to chase referrals in mount and reconnect.
739 * origin_fullpath: first or original referral path
740 * leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
742 * current_fullpath: pointer to either origin_fullpath or leaf_fullpath
743 * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
745 * format: \\HOST\SHARE\[OPTIONAL PATH]
747 char *origin_fullpath, *leaf_fullpath, *current_fullpath;
751 static inline void cifs_server_lock(struct TCP_Server_Info *server)
753 unsigned int nofs_flag = memalloc_nofs_save();
755 mutex_lock(&server->_srv_mutex);
756 server->nofs_flag = nofs_flag;
759 static inline void cifs_server_unlock(struct TCP_Server_Info *server)
761 unsigned int nofs_flag = server->nofs_flag;
763 mutex_unlock(&server->_srv_mutex);
764 memalloc_nofs_restore(nofs_flag);
767 struct cifs_credits {
769 unsigned int instance;
772 static inline unsigned int
773 in_flight(struct TCP_Server_Info *server)
776 spin_lock(&server->req_lock);
777 num = server->in_flight;
778 spin_unlock(&server->req_lock);
783 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
786 spin_lock(&server->req_lock);
788 spin_unlock(&server->req_lock);
789 return num >= num_credits;
793 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
796 server->ops->add_credits(server, credits, optype);
800 add_credits_and_wake_if(struct TCP_Server_Info *server,
801 const struct cifs_credits *credits, const int optype)
803 if (credits->value) {
804 server->ops->add_credits(server, credits, optype);
805 wake_up(&server->request_q);
810 set_credits(struct TCP_Server_Info *server, const int val)
812 server->ops->set_credits(server, val);
816 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
817 const unsigned int payload_size)
819 return server->ops->adjust_credits ?
820 server->ops->adjust_credits(server, credits, payload_size) : 0;
824 get_next_mid64(struct TCP_Server_Info *server)
826 return cpu_to_le64(server->ops->get_next_mid(server));
830 get_next_mid(struct TCP_Server_Info *server)
832 __u16 mid = server->ops->get_next_mid(server);
834 * The value in the SMB header should be little endian for easy
835 * on-the-wire decoding.
837 return cpu_to_le16(mid);
841 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
843 if (server->ops->revert_current_mid)
844 server->ops->revert_current_mid(server, val);
848 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
849 const struct smb2_hdr *shdr)
851 unsigned int num = le16_to_cpu(shdr->CreditCharge);
853 return revert_current_mid(server, num > 0 ? num : 1);
857 get_mid(const struct smb_hdr *smb)
859 return le16_to_cpu(smb->Mid);
863 compare_mid(__u16 mid, const struct smb_hdr *smb)
865 return mid == le16_to_cpu(smb->Mid);
869 * When the server supports very large reads and writes via POSIX extensions,
870 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
871 * including the RFC1001 length.
873 * Note that this might make for "interesting" allocation problems during
874 * writeback however as we have to allocate an array of pointers for the
875 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
877 * For reads, there is a similar problem as we need to allocate an array
878 * of kvecs to handle the receive, though that should only need to be done
881 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
882 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
885 * When the server doesn't allow large posix writes, only allow a rsize/wsize
886 * of 2^17-1 minus the size of the call header. That allows for a read or
887 * write up to the maximum size described by RFC1002.
889 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
890 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
892 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
895 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
896 * those values when posix extensions aren't in force. In actuality here, we
897 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
898 * to be ok with the extra byte even though Windows doesn't send writes that
903 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
905 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
906 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
909 * Macros to allow the TCP_Server_Info->net field and related code to drop out
910 * when CONFIG_NET_NS isn't set.
915 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
920 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
927 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
932 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
938 struct cifs_server_iface {
939 struct list_head iface_head;
940 struct kref refcount;
942 unsigned int rdma_capable : 1;
943 unsigned int rss_capable : 1;
944 unsigned int is_active : 1; /* unset if non existent */
945 struct sockaddr_storage sockaddr;
948 /* release iface when last ref is dropped */
950 release_iface(struct kref *ref)
952 struct cifs_server_iface *iface = container_of(ref,
953 struct cifs_server_iface,
955 list_del_init(&iface->iface_head);
960 * compare two interfaces a and b
961 * return 0 if everything matches.
962 * return 1 if a has higher link speed, or rdma capable, or rss capable
963 * return -1 otherwise.
966 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
971 if (a->speed == b->speed) {
972 if (a->rdma_capable == b->rdma_capable) {
973 if (a->rss_capable == b->rss_capable) {
974 cmp_ret = memcmp(&a->sockaddr, &b->sockaddr,
975 sizeof(a->sockaddr));
978 else if (cmp_ret > 0)
982 } else if (a->rss_capable > b->rss_capable)
986 } else if (a->rdma_capable > b->rdma_capable)
990 } else if (a->speed > b->speed)
997 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
998 struct TCP_Server_Info *server;
999 struct cifs_server_iface *iface; /* interface in use */
1000 __u8 signkey[SMB3_SIGN_KEY_SIZE];
1004 * Session structure. One of these for each uid session with a particular host
1007 struct list_head smb_ses_list;
1008 struct list_head rlist; /* reconnect list */
1009 struct list_head tcon_list;
1010 struct cifs_tcon *tcon_ipc;
1011 struct mutex session_mutex;
1012 struct TCP_Server_Info *server; /* pointer to server info */
1013 int ses_count; /* reference counter */
1014 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
1015 unsigned overrideSecFlg; /* if non-zero override global sec flags */
1016 char *serverOS; /* name of operating system underlying server */
1017 char *serverNOS; /* name of network operating system of server */
1018 char *serverDomain; /* security realm of server */
1019 __u64 Suid; /* remote smb uid */
1020 kuid_t linux_uid; /* overriding owner of files on the mount */
1021 kuid_t cred_uid; /* owner of credentials */
1022 unsigned int capabilities;
1023 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
1024 char *user_name; /* must not be null except during init of sess
1025 and after mount option parsing we fill it */
1028 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
1029 struct session_key auth_key;
1030 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
1031 enum securityEnum sectype; /* what security flavor was specified? */
1032 bool sign; /* is signing required? */
1034 __u16 session_flags;
1035 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
1036 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
1037 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
1038 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1041 * Network interfaces available on the server this session is
1044 * Other channels can be opened by connecting and binding this
1045 * session to interfaces from this list.
1047 * iface_lock should be taken when accessing any of these fields
1049 spinlock_t iface_lock;
1050 /* ========= begin: protected by iface_lock ======== */
1051 struct list_head iface_list;
1053 unsigned long iface_last_update; /* jiffies */
1054 /* ========= end: protected by iface_lock ======== */
1056 spinlock_t chan_lock;
1057 /* ========= begin: protected by chan_lock ======== */
1058 #define CIFS_MAX_CHANNELS 16
1059 #define CIFS_ALL_CHANNELS_SET(ses) \
1060 ((1UL << (ses)->chan_count) - 1)
1061 #define CIFS_ALL_CHANS_GOOD(ses) \
1062 (!(ses)->chans_need_reconnect)
1063 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
1064 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
1065 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
1066 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
1067 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
1068 test_bit((index), &(ses)->chans_need_reconnect)
1069 #define CIFS_CHAN_IN_RECONNECT(ses, index) \
1070 ((ses)->chans[(index)].in_reconnect)
1072 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1075 atomic_t chan_seq; /* round robin state */
1078 * chans_need_reconnect is a bitmap indicating which of the channels
1079 * under this smb session needs to be reconnected.
1080 * If not multichannel session, only one bit will be used.
1082 * We will ask for sess and tcon reconnection only if all the
1083 * channels are marked for needing reconnection. This will
1084 * enable the sessions on top to continue to live till any
1085 * of the channels below are active.
1087 unsigned long chans_need_reconnect;
1088 /* ========= end: protected by chan_lock ======== */
1092 cap_unix(struct cifs_ses *ses)
1094 return ses->server->vals->cap_unix & ses->capabilities;
1098 * common struct for holding inode info when searching for or updating an
1099 * inode with new info
1102 #define CIFS_FATTR_DFS_REFERRAL 0x1
1103 #define CIFS_FATTR_DELETE_PENDING 0x2
1104 #define CIFS_FATTR_NEED_REVAL 0x4
1105 #define CIFS_FATTR_INO_COLLISION 0x8
1106 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1107 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1120 unsigned int cf_nlink;
1121 unsigned int cf_dtype;
1122 struct timespec64 cf_atime;
1123 struct timespec64 cf_mtime;
1124 struct timespec64 cf_ctime;
1128 struct cached_dirent {
1129 struct list_head entry;
1134 struct cifs_fattr fattr;
1137 struct cached_dirents {
1140 struct dir_context *ctx; /*
1141 * Only used to make sure we only take entries
1142 * from a single context. Never dereferenced.
1144 struct mutex de_mutex;
1145 int pos; /* Expected ctx->pos */
1146 struct list_head entries;
1150 bool is_valid:1; /* Do we have a useable root fid */
1151 bool file_all_info_is_valid:1;
1153 unsigned long time; /* jiffies of when lease was taken */
1154 struct kref refcount;
1155 struct cifs_fid *fid;
1156 struct mutex fid_mutex;
1157 struct cifs_tcon *tcon;
1158 struct dentry *dentry;
1159 struct work_struct lease_break;
1160 struct smb2_file_all_info file_all_info;
1161 struct cached_dirents dirents;
1165 * there is one of these for each connection to a resource on a particular
1169 struct list_head tcon_list;
1171 struct list_head rlist; /* reconnect list */
1172 atomic_t num_local_opens; /* num of all opens including disconnected */
1173 atomic_t num_remote_opens; /* num of all network opens on server */
1174 struct list_head openFileList;
1175 spinlock_t open_file_lock; /* protects list above */
1176 struct cifs_ses *ses; /* pointer to session associated with */
1177 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1178 char *nativeFileSystem;
1179 char *password; /* for share-level security */
1180 __u32 tid; /* The 4 byte tree id */
1181 __u16 Flags; /* optional support bits */
1182 enum tid_status_enum status;
1183 atomic_t num_smbs_sent;
1186 atomic_t num_writes;
1188 atomic_t num_flushes;
1189 atomic_t num_oplock_brks;
1191 atomic_t num_closes;
1192 atomic_t num_deletes;
1193 atomic_t num_mkdirs;
1194 atomic_t num_posixopens;
1195 atomic_t num_posixmkdirs;
1196 atomic_t num_rmdirs;
1197 atomic_t num_renames;
1198 atomic_t num_t2renames;
1199 atomic_t num_ffirst;
1201 atomic_t num_fclose;
1202 atomic_t num_hardlinks;
1203 atomic_t num_symlinks;
1205 atomic_t num_acl_get;
1206 atomic_t num_acl_set;
1209 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1210 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1214 __u64 bytes_written;
1215 spinlock_t stat_lock; /* protects the two fields above */
1216 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1217 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1218 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1219 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1220 bool pipe:1; /* set if connection to pipe share */
1221 bool print:1; /* set if connection to printer share */
1224 bool nohandlecache:1; /* if strange server resource prob can turn off */
1226 bool seal:1; /* transport encryption for this mounted share */
1227 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1228 for this mount even if server would support */
1229 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1230 bool local_lease:1; /* check leases (only) on local system not remote */
1231 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1232 bool broken_sparse_sup; /* if server or share does not support sparse */
1233 bool need_reconnect:1; /* connection reset, tid now invalid */
1234 bool need_reopen_files:1; /* need to reopen tcon file handles */
1235 bool use_resilient:1; /* use resilient instead of durable handles */
1236 bool use_persistent:1; /* use persistent instead of durable handles */
1237 bool no_lease:1; /* Do not request leases on files or directories */
1238 bool use_witness:1; /* use witness protocol */
1239 __le32 capabilities;
1241 __u32 maximal_access;
1242 __u32 vol_serial_number;
1243 __le64 vol_create_time;
1244 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1245 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1246 __u32 ss_flags; /* sector size flags */
1247 __u32 perf_sector_size; /* best sector size for perf */
1249 __u32 max_bytes_chunk;
1250 __u32 max_bytes_copy;
1251 #ifdef CONFIG_CIFS_FSCACHE
1252 u64 resource_id; /* server resource id */
1253 struct fscache_volume *fscache; /* cookie for share */
1255 struct list_head pending_opens; /* list of incomplete opens */
1256 struct cached_fid crfid; /* Cached root fid */
1257 /* BB add field for back pointer to sb struct(s)? */
1258 #ifdef CONFIG_CIFS_DFS_UPCALL
1259 struct list_head ulist; /* cache update list */
1261 struct delayed_work query_interfaces; /* query interfaces workqueue job */
1265 * This is a refcounted and timestamped container for a tcon pointer. The
1266 * container holds a tcon reference. It is considered safe to free one of
1267 * these when the tl_count goes to 0. The tl_time is the time of the last
1268 * "get" on the container.
1271 struct rb_node tl_rbnode;
1273 unsigned long tl_flags;
1274 #define TCON_LINK_MASTER 0
1275 #define TCON_LINK_PENDING 1
1276 #define TCON_LINK_IN_TREE 2
1277 unsigned long tl_time;
1279 struct cifs_tcon *tl_tcon;
1282 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1283 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1285 static inline struct cifs_tcon *
1286 tlink_tcon(struct tcon_link *tlink)
1288 return tlink->tl_tcon;
1291 static inline struct tcon_link *
1292 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1294 return cifs_sb->master_tlink;
1297 extern void cifs_put_tlink(struct tcon_link *tlink);
1299 static inline struct tcon_link *
1300 cifs_get_tlink(struct tcon_link *tlink)
1302 if (tlink && !IS_ERR(tlink))
1303 atomic_inc(&tlink->tl_count);
1307 /* This function is always expected to succeed */
1308 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1310 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1312 struct cifs_pending_open {
1313 struct list_head olist;
1314 struct tcon_link *tlink;
1319 struct cifs_deferred_close {
1320 struct list_head dlist;
1321 struct tcon_link *tlink;
1323 __u64 persistent_fid;
1328 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1329 * This is used to track byte stream locks on the file
1331 struct cifsLockInfo {
1332 struct list_head llist; /* pointer to next cifsLockInfo */
1333 struct list_head blist; /* pointer to locks blocked on this */
1334 wait_queue_head_t block_q;
1343 * One of these for each open instance of a file
1345 struct cifs_search_info {
1346 loff_t index_of_last_entry;
1347 __u16 entries_in_buffer;
1350 char *ntwrk_buf_start;
1351 char *srch_entries_start;
1353 const char *presume_name;
1354 unsigned int resume_name_len;
1358 bool smallBuf:1; /* so we know which buf_release function to call */
1361 #define ACL_NO_MODE ((umode_t)(-1))
1362 struct cifs_open_parms {
1363 struct cifs_tcon *tcon;
1364 struct cifs_sb_info *cifs_sb;
1369 struct cifs_fid *fid;
1376 __u64 persistent_fid; /* persist file id for smb2 */
1377 __u64 volatile_fid; /* volatile file id for smb2 */
1378 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1379 __u8 create_guid[16];
1381 struct cifs_pending_open *pending_open;
1383 #ifdef CONFIG_CIFS_DEBUG2
1385 #endif /* CIFS_DEBUG2 */
1389 struct cifs_fid_locks {
1390 struct list_head llist;
1391 struct cifsFileInfo *cfile; /* fid that owns locks */
1392 struct list_head locks; /* locks held by fid above */
1395 struct cifsFileInfo {
1396 /* following two lists are protected by tcon->open_file_lock */
1397 struct list_head tlist; /* pointer to next fid owned by tcon */
1398 struct list_head flist; /* next fid (file instance) for this inode */
1399 /* lock list below protected by cifsi->lock_sem */
1400 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1401 kuid_t uid; /* allows finding which FileInfo structure */
1402 __u32 pid; /* process id who opened file */
1403 struct cifs_fid fid; /* file id from remote */
1404 struct list_head rlist; /* reconnect list */
1405 /* BB add lock scope info here if needed */ ;
1406 /* lock scope id (0 if none) */
1407 struct dentry *dentry;
1408 struct tcon_link *tlink;
1409 unsigned int f_flags;
1410 bool invalidHandle:1; /* file closed via session abend */
1412 bool oplock_break_cancelled:1;
1413 unsigned int oplock_epoch; /* epoch from the lease break */
1414 __u32 oplock_level; /* oplock/lease level from the lease break */
1416 spinlock_t file_info_lock; /* protects four flag/count fields above */
1417 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1418 struct cifs_search_info srch_inf;
1419 struct work_struct oplock_break; /* work for oplock breaks */
1420 struct work_struct put; /* work for the final part of _put */
1421 struct delayed_work deferred;
1422 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
1425 struct cifs_io_parms {
1427 __u64 persistent_fid; /* persist file id for smb2 */
1428 __u64 volatile_fid; /* volatile file id for smb2 */
1431 unsigned int length;
1432 struct cifs_tcon *tcon;
1433 struct TCP_Server_Info *server;
1436 struct cifs_aio_ctx {
1437 struct kref refcount;
1438 struct list_head list;
1439 struct mutex aio_mutex;
1440 struct completion done;
1441 struct iov_iter iter;
1443 struct cifsFileInfo *cfile;
1446 unsigned int npages;
1449 unsigned int total_len;
1452 * Indicates if this aio_ctx is for direct_io,
1453 * If yes, iter is a copy of the user passed iov_iter
1458 /* asynchronous read support */
1459 struct cifs_readdata {
1460 struct kref refcount;
1461 struct list_head list;
1462 struct completion done;
1463 struct cifsFileInfo *cfile;
1464 struct address_space *mapping;
1465 struct cifs_aio_ctx *ctx;
1468 unsigned int got_bytes;
1471 struct work_struct work;
1472 int (*read_into_pages)(struct TCP_Server_Info *server,
1473 struct cifs_readdata *rdata,
1475 int (*copy_into_pages)(struct TCP_Server_Info *server,
1476 struct cifs_readdata *rdata,
1477 struct iov_iter *iter);
1479 struct TCP_Server_Info *server;
1480 #ifdef CONFIG_CIFS_SMB_DIRECT
1483 unsigned int pagesz;
1484 unsigned int page_offset;
1485 unsigned int tailsz;
1486 struct cifs_credits credits;
1487 unsigned int nr_pages;
1488 struct page **pages;
1491 /* asynchronous write support */
1492 struct cifs_writedata {
1493 struct kref refcount;
1494 struct list_head list;
1495 struct completion done;
1496 enum writeback_sync_modes sync_mode;
1497 struct work_struct work;
1498 struct cifsFileInfo *cfile;
1499 struct cifs_aio_ctx *ctx;
1504 struct TCP_Server_Info *server;
1505 #ifdef CONFIG_CIFS_SMB_DIRECT
1508 unsigned int pagesz;
1509 unsigned int page_offset;
1510 unsigned int tailsz;
1511 struct cifs_credits credits;
1512 unsigned int nr_pages;
1513 struct page **pages;
1517 * Take a reference on the file private data. Must be called with
1518 * cfile->file_info_lock held.
1521 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1526 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1527 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1529 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1531 #define CIFS_CACHE_READ_FLG 1
1532 #define CIFS_CACHE_HANDLE_FLG 2
1533 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1534 #define CIFS_CACHE_WRITE_FLG 4
1535 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1536 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1538 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
1539 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1540 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
1543 * One of these for each file inode
1546 struct cifsInodeInfo {
1547 struct netfs_inode netfs; /* Netfslib context and vfs inode */
1548 bool can_cache_brlcks;
1549 struct list_head llist; /* locks helb by this inode */
1551 * NOTE: Some code paths call down_read(lock_sem) twice, so
1552 * we must always use cifs_down_write() instead of down_write()
1553 * for this semaphore to avoid deadlocks.
1555 struct rw_semaphore lock_sem; /* protect the fields above */
1556 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1557 struct list_head openFileList;
1558 spinlock_t open_file_lock; /* protects openFileList */
1559 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1560 unsigned int oplock; /* oplock/lease level we have */
1561 unsigned int epoch; /* used to track lease state changes */
1562 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1563 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1564 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1565 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1566 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1567 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1568 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
1569 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
1570 unsigned long flags;
1571 spinlock_t writers_lock;
1572 unsigned int writers; /* Number of writers on this inode */
1573 unsigned long time; /* jiffies of last update of inode */
1574 u64 server_eof; /* current file size on server -- protected by i_lock */
1575 u64 uniqueid; /* server inode number */
1576 u64 createtime; /* creation time on server */
1577 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1578 struct list_head deferred_closes; /* list of deferred closes */
1579 spinlock_t deferred_lock; /* protection on deferred list */
1580 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
1583 static inline struct cifsInodeInfo *
1584 CIFS_I(struct inode *inode)
1586 return container_of(inode, struct cifsInodeInfo, netfs.inode);
1589 static inline struct cifs_sb_info *
1590 CIFS_SB(struct super_block *sb)
1592 return sb->s_fs_info;
1595 static inline struct cifs_sb_info *
1596 CIFS_FILE_SB(struct file *file)
1598 return CIFS_SB(file_inode(file)->i_sb);
1601 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1603 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1610 convert_delimiter(char *path, char delim)
1612 char old_delim, *pos;
1620 while ((pos = strchr(pos, old_delim)))
1624 #define cifs_stats_inc atomic_inc
1626 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1630 spin_lock(&tcon->stat_lock);
1631 tcon->bytes_written += bytes;
1632 spin_unlock(&tcon->stat_lock);
1636 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1639 spin_lock(&tcon->stat_lock);
1640 tcon->bytes_read += bytes;
1641 spin_unlock(&tcon->stat_lock);
1646 * This is the prototype for the mid receive function. This function is for
1647 * receiving the rest of the SMB frame, starting with the WordCount (which is
1648 * just after the MID in struct smb_hdr). Note:
1650 * - This will be called by cifsd, with no locks held.
1651 * - The mid will still be on the pending_mid_q.
1652 * - mid->resp_buf will point to the current buffer.
1654 * Returns zero on a successful receive, or an error. The receive state in
1655 * the TCP_Server_Info will also be updated.
1657 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1658 struct mid_q_entry *mid);
1661 * This is the prototype for the mid callback function. This is called once the
1662 * mid has been received off of the socket. When creating one, take special
1663 * care to avoid deadlocks. Things to bear in mind:
1665 * - it will be called by cifsd, with no locks held
1666 * - the mid will be removed from any lists
1668 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1671 * This is the protopyte for mid handle function. This is called once the mid
1672 * has been recognized after decryption of the message.
1674 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1675 struct mid_q_entry *mid);
1677 /* one of these for every pending CIFS request to the server */
1678 struct mid_q_entry {
1679 struct list_head qhead; /* mids waiting on reply from this server */
1680 struct kref refcount;
1681 struct TCP_Server_Info *server; /* server corresponding to this mid */
1682 __u64 mid; /* multiplex id */
1683 __u16 credits; /* number of credits consumed by this mid */
1684 __u16 credits_received; /* number of credits from the response */
1685 __u32 pid; /* process id */
1686 __u32 sequence_number; /* for CIFS signing */
1687 unsigned long when_alloc; /* when mid was created */
1688 #ifdef CONFIG_CIFS_STATS2
1689 unsigned long when_sent; /* time when smb send finished */
1690 unsigned long when_received; /* when demux complete (taken off wire) */
1692 mid_receive_t *receive; /* call receive callback */
1693 mid_callback_t *callback; /* call completion callback */
1694 mid_handle_t *handle; /* call handle mid callback */
1695 void *callback_data; /* general purpose pointer for callback */
1696 struct task_struct *creator;
1697 void *resp_buf; /* pointer to received SMB header */
1698 unsigned int resp_buf_size;
1699 int mid_state; /* wish this were enum but can not pass to wait_event */
1700 unsigned int mid_flags;
1701 __le16 command; /* smb command code */
1702 unsigned int optype; /* operation type */
1703 bool large_buf:1; /* if valid response, is pointer to large buf */
1704 bool multiRsp:1; /* multiple trans2 responses for one request */
1705 bool multiEnd:1; /* both received */
1706 bool decrypted:1; /* decrypted entry */
1709 struct close_cancelled_open {
1710 struct cifs_fid fid;
1711 struct cifs_tcon *tcon;
1712 struct work_struct work;
1717 /* Make code in transport.c a little cleaner by moving
1718 update of optional stats into function below */
1719 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1721 atomic_inc(&server->in_send);
1724 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1726 atomic_dec(&server->in_send);
1729 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1731 atomic_inc(&server->num_waiters);
1734 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1736 atomic_dec(&server->num_waiters);
1739 #ifdef CONFIG_CIFS_STATS2
1740 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1742 mid->when_sent = jiffies;
1745 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1750 /* for pending dnotify requests */
1751 struct dir_notify_req {
1752 struct list_head lhead;
1759 __u32 filter; /* CompletionFilter (for multishot) */
1764 struct dfs_info3_param {
1765 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1775 struct list_head list;
1776 struct cifsFileInfo *cfile;
1779 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1782 kfree(param->path_name);
1783 kfree(param->node_name);
1787 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1788 int number_of_items)
1791 if ((number_of_items == 0) || (param == NULL))
1793 for (i = 0; i < number_of_items; i++) {
1794 kfree(param[i].path_name);
1795 kfree(param[i].node_name);
1800 static inline bool is_interrupt_error(int error)
1805 case -ERESTARTNOHAND:
1806 case -ERESTARTNOINTR:
1812 static inline bool is_retryable_error(int error)
1814 if (is_interrupt_error(error) || error == -EAGAIN)
1820 /* cifs_get_writable_file() flags */
1821 #define FIND_WR_ANY 0
1822 #define FIND_WR_FSUID_ONLY 1
1823 #define FIND_WR_WITH_DELETE 2
1826 #define MID_REQUEST_ALLOCATED 1
1827 #define MID_REQUEST_SUBMITTED 2
1828 #define MID_RESPONSE_RECEIVED 4
1829 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1830 #define MID_RESPONSE_MALFORMED 0x10
1831 #define MID_SHUTDOWN 0x20
1834 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1835 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1837 /* Types of response buffer returned from SendReceive2 */
1838 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1839 #define CIFS_SMALL_BUFFER 1
1840 #define CIFS_LARGE_BUFFER 2
1841 #define CIFS_IOVEC 4 /* array of response buffers */
1843 /* Type of Request to SendReceive2 */
1844 #define CIFS_BLOCKING_OP 1 /* operation can block */
1845 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1846 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1847 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1848 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1849 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1851 /* Type of request operation */
1852 #define CIFS_ECHO_OP 0x080 /* echo request */
1853 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1854 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1855 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
1856 /* Lower bitmask values are reserved by others below. */
1857 #define CIFS_SESS_OP 0x2000 /* session setup request */
1858 #define CIFS_OP_MASK 0x2780 /* mask request type */
1860 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1861 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1862 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1864 /* Security Flags: indicate type of session setup needed */
1865 #define CIFSSEC_MAY_SIGN 0x00001
1866 #define CIFSSEC_MAY_NTLMV2 0x00004
1867 #define CIFSSEC_MAY_KRB5 0x00008
1868 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1869 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1871 #define CIFSSEC_MUST_SIGN 0x01001
1872 /* note that only one of the following can be set so the
1873 result of setting MUST flags more than once will be to
1874 require use of the stronger protocol */
1875 #define CIFSSEC_MUST_NTLMV2 0x04004
1876 #define CIFSSEC_MUST_KRB5 0x08008
1877 #ifdef CONFIG_CIFS_UPCALL
1878 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1880 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1882 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1883 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1885 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1886 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
1887 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1889 *****************************************************************
1890 * All constants go here
1891 *****************************************************************
1894 #define UID_HASH (16)
1897 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1898 * following to be declared.
1901 /****************************************************************************
1902 * Locking notes. All updates to global variables and lists should be
1903 * protected by spinlocks or semaphores.
1907 * GlobalMid_Lock protects:
1908 * list operations on pending_mid_q and oplockQ
1909 * updates to XID counters, multiplex id and SMB sequence numbers
1910 * list operations on global DnotifyReqList
1911 * updates to ses->status and TCP_Server_Info->tcpStatus
1912 * updates to server->CurrentMid
1913 * tcp_ses_lock protects:
1914 * list operations on tcp and SMB session lists
1915 * tcon->open_file_lock protects the list of open files hanging off the tcon
1916 * inode->open_file_lock protects the openFileList hanging off the inode
1917 * cfile->file_info_lock protects counters and fields in cifs file struct
1918 * f_owner.lock protects certain per file struct operations
1919 * mapping->page_lock protects certain per page operations
1921 * Note that the cifs_tcon.open_file_lock should be taken before
1922 * not after the cifsInodeInfo.open_file_lock
1926 * cifsInodeInfo->lock_sem protects:
1927 * the list of locks held by the inode
1929 ****************************************************************************/
1931 #ifdef DECLARE_GLOBALS_HERE
1932 #define GLOBAL_EXTERN
1934 #define GLOBAL_EXTERN extern
1938 * the list of TCP_Server_Info structures, ie each of the sockets
1939 * connecting our client to a distinct server (ip address), is
1940 * chained together by cifs_tcp_ses_list. The list of all our SMB
1941 * sessions (and from that the tree connections) can be found
1942 * by iterating over cifs_tcp_ses_list
1944 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1947 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1948 * tcp session, and the list of tcon's per smb session. It also protects
1949 * the reference counters for the server, smb session, and tcon. It also
1950 * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
1951 * changes to the tcon->tidStatus should be done while holding this lock.
1952 * generally the locks should be taken in order tcp_ses_lock before
1953 * tcon->open_file_lock and that before file->file_info_lock since the
1954 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1956 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1959 * Global transaction id (XID) information
1961 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1962 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1963 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1964 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1965 /* on midQ entries */
1967 * Global counters, updated atomically
1969 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1970 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1971 GLOBAL_EXTERN atomic_t tcpSesNextId;
1972 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1973 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1974 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1976 /* Various Debug counters */
1977 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1978 #ifdef CONFIG_CIFS_STATS2
1979 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1980 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1981 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1983 GLOBAL_EXTERN atomic_t smBufAllocCount;
1984 GLOBAL_EXTERN atomic_t midCount;
1987 extern bool enable_oplocks; /* enable or disable oplocks */
1988 extern bool lookupCacheEnabled;
1989 extern unsigned int global_secflags; /* if on, session setup sent
1990 with more secure ntlmssp2 challenge/resp */
1991 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1992 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
1993 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
1994 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
1995 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1996 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1997 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1998 extern unsigned int cifs_min_small; /* min size of small buf pool */
1999 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
2000 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
2002 void cifs_oplock_break(struct work_struct *work);
2003 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
2004 void smb2_deferred_work_close(struct work_struct *work);
2006 extern const struct slow_work_ops cifs_oplock_break_ops;
2007 extern struct workqueue_struct *cifsiod_wq;
2008 extern struct workqueue_struct *decrypt_wq;
2009 extern struct workqueue_struct *fileinfo_put_wq;
2010 extern struct workqueue_struct *cifsoplockd_wq;
2011 extern struct workqueue_struct *deferredclose_wq;
2012 extern __u32 cifs_lock_secret;
2014 extern mempool_t *cifs_mid_poolp;
2016 /* Operations for different SMB versions */
2017 #define SMB1_VERSION_STRING "1.0"
2018 #define SMB20_VERSION_STRING "2.0"
2019 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2020 extern struct smb_version_operations smb1_operations;
2021 extern struct smb_version_values smb1_values;
2022 extern struct smb_version_operations smb20_operations;
2023 extern struct smb_version_values smb20_values;
2024 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
2025 #define SMB21_VERSION_STRING "2.1"
2026 extern struct smb_version_operations smb21_operations;
2027 extern struct smb_version_values smb21_values;
2028 #define SMBDEFAULT_VERSION_STRING "default"
2029 extern struct smb_version_values smbdefault_values;
2030 #define SMB3ANY_VERSION_STRING "3"
2031 extern struct smb_version_values smb3any_values;
2032 #define SMB30_VERSION_STRING "3.0"
2033 extern struct smb_version_operations smb30_operations;
2034 extern struct smb_version_values smb30_values;
2035 #define SMB302_VERSION_STRING "3.02"
2036 #define ALT_SMB302_VERSION_STRING "3.0.2"
2037 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
2038 extern struct smb_version_values smb302_values;
2039 #define SMB311_VERSION_STRING "3.1.1"
2040 #define ALT_SMB311_VERSION_STRING "3.11"
2041 extern struct smb_version_operations smb311_operations;
2042 extern struct smb_version_values smb311_values;
2044 static inline char *get_security_type_str(enum securityEnum sectype)
2048 return "RawNTLMSSP";
2058 static inline bool is_smb1_server(struct TCP_Server_Info *server)
2060 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
2063 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
2066 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
2067 * Subsystem Notifies That a Share Is a DFS Share.
2069 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
2070 * Application Updates a Share.
2072 if (!tcon || !tcon->ses || !tcon->ses->server)
2074 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
2075 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
2078 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
2079 const struct dfs_info3_param *ref)
2082 * Check if all targets are capable of handling DFS referrals as per
2083 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
2085 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
2088 static inline u64 cifs_flock_len(struct file_lock *fl)
2090 return fl->fl_end == OFFSET_MAX ? 0 : fl->fl_end - fl->fl_start + 1;
2093 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
2095 if (WARN_ON_ONCE(!ses || !ses->server))
2098 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
2099 * servers do require it during NTLMSSP.
2101 if (ses->server->dialect <= SMB20_PROT_ID)
2102 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
2103 return sizeof(ses->workstation_name);
2106 #endif /* _CIFS_GLOB_H */