1 /*
2 * fs/cifs/cifsglob.h
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
7 *
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published
10 * by the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU Lesser General Public License for more details.
17 *
18 */
19 #ifndef _CIFS_GLOB_H
20 #define _CIFS_GLOB_H
21
22 #include <linux/in.h>
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/mempool.h>
26 #include <linux/workqueue.h>
27 #include "cifs_fs_sb.h"
28 #include "cifsacl.h"
29 #include <crypto/internal/hash.h>
30 #include <linux/scatterlist.h>
31 #include <uapi/linux/cifs/cifs_mount.h>
32 #include "smb2pdu.h"
33
34 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
35
36 #define CIFS_PORT 445
37 #define RFC1001_PORT 139
38
39 /*
40 * The sizes of various internal tables and strings
41 */
42 #define MAX_UID_INFO 16
43 #define MAX_SES_INFO 2
44 #define MAX_TCON_INFO 4
45
46 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
47
48 #define CIFS_MIN_RCV_POOL 4
49
50 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
51 /*
52 * default attribute cache timeout (jiffies)
53 */
54 #define CIFS_DEF_ACTIMEO (1 * HZ)
55
56 /*
57 * max attribute cache timeout (jiffies) - 2^30
58 */
59 #define CIFS_MAX_ACTIMEO (1 << 30)
60
61 /*
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
64 */
65 #define CIFS_MAX_REQ 32767
66
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69
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)
73
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
78
79 /* maximum number of PDUs in one compound */
80 #define MAX_COMPOUND 5
81
82 /*
83 * Default number of credits to keep available for SMB3.
84 * This value is chosen somewhat arbitrarily. The Windows client
85 * defaults to 128 credits, the Windows server allows clients up to
86 * 512 credits (or 8K for later versions), and the NetApp server
87 * does not limit clients at all. Choose a high enough default value
88 * such that the client shouldn't limit performance, but allow mount
89 * to override (until you approach 64K, where we limit credits to 65000
90 * to reduce possibility of seeing more server credit overflow bugs.
91 */
92 #define SMB2_MAX_CREDITS_AVAILABLE 32000
93
94 #include "cifspdu.h"
95
96 #ifndef XATTR_DOS_ATTRIB
97 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
98 #endif
99
100 /*
101 * CIFS vfs client Status information (based on what we know.)
102 */
103
104 /* associated with each tcp and smb session */
105 enum statusEnum {
106 CifsNew = 0,
107 CifsGood,
108 CifsExiting,
109 CifsNeedReconnect,
110 CifsNeedNegotiate
111 };
112
113 enum securityEnum {
114 Unspecified = 0, /* not specified */
115 LANMAN, /* Legacy LANMAN auth */
116 NTLM, /* Legacy NTLM012 auth with NTLM hash */
117 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
118 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
119 Kerberos, /* Kerberos via SPNEGO */
120 };
121
122 struct session_key {
123 unsigned int len;
124 char *response;
125 };
126
127 /* crypto security descriptor definition */
128 struct sdesc {
129 struct shash_desc shash;
130 char ctx[];
131 };
132
133 /* crypto hashing related structure/fields, not specific to a sec mech */
134 struct cifs_secmech {
135 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
136 struct crypto_shash *md5; /* md5 hash function */
137 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
138 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
139 struct crypto_shash *sha512; /* sha512 hash function */
140 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
141 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
142 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
143 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
144 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
145 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
146 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
147 };
148
149 /* per smb session structure/fields */
150 struct ntlmssp_auth {
151 bool sesskey_per_smbsess; /* whether session key is per smb session */
152 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
153 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
154 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
155 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
156 };
157
158 struct cifs_cred {
159 int uid;
160 int gid;
161 int mode;
162 int cecount;
163 struct cifs_sid osid;
164 struct cifs_sid gsid;
165 struct cifs_ntace *ntaces;
166 struct cifs_ace *aces;
167 };
168
169 /*
170 *****************************************************************
171 * Except the CIFS PDUs themselves all the
172 * globally interesting structs should go here
173 *****************************************************************
174 */
175
176 /*
177 * A smb_rqst represents a complete request to be issued to a server. It's
178 * formed by a kvec array, followed by an array of pages. Page data is assumed
179 * to start at the beginning of the first page.
180 */
181 struct smb_rqst {
182 struct kvec *rq_iov; /* array of kvecs */
183 unsigned int rq_nvec; /* number of kvecs in array */
184 struct page **rq_pages; /* pointer to array of page ptrs */
185 unsigned int rq_offset; /* the offset to the 1st page */
186 unsigned int rq_npages; /* number pages in array */
187 unsigned int rq_pagesz; /* page size to use */
188 unsigned int rq_tailsz; /* length of last page */
189 };
190
191 enum smb_version {
192 Smb_1 = 1,
193 Smb_20,
194 Smb_21,
195 Smb_30,
196 Smb_302,
197 Smb_311,
198 Smb_3any,
199 Smb_default,
200 Smb_version_err
201 };
202
203 struct mid_q_entry;
204 struct TCP_Server_Info;
205 struct cifsFileInfo;
206 struct cifs_ses;
207 struct cifs_tcon;
208 struct dfs_info3_param;
209 struct cifs_fattr;
210 struct smb_vol;
211 struct cifs_fid;
212 struct cifs_readdata;
213 struct cifs_writedata;
214 struct cifs_io_parms;
215 struct cifs_search_info;
216 struct cifsInodeInfo;
217 struct cifs_open_parms;
218
219 struct smb_version_operations {
220 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
221 struct mid_q_entry *);
222 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
223 /* setup request: allocate mid, sign message */
224 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
225 struct smb_rqst *);
226 /* setup async request: allocate mid, sign message */
227 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
228 struct smb_rqst *);
229 /* check response: verify signature, map error */
230 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
231 bool);
232 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
233 const int);
234 void (*set_credits)(struct TCP_Server_Info *, const int);
235 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
236 unsigned int (*get_credits)(struct mid_q_entry *);
237 __u64 (*get_next_mid)(struct TCP_Server_Info *);
238 void (*revert_current_mid)(struct TCP_Server_Info *server,
239 const unsigned int val);
240 /* data offset from read response message */
241 unsigned int (*read_data_offset)(char *);
242 /*
243 * Data length from read response message
244 * When in_remaining is true, the returned data length is in
245 * message field DataRemaining for out-of-band data read (e.g through
246 * Memory Registration RDMA write in SMBD).
247 * Otherwise, the returned data length is in message field DataLength.
248 */
249 unsigned int (*read_data_length)(char *, bool in_remaining);
250 /* map smb to linux error */
251 int (*map_error)(char *, bool);
252 /* find mid corresponding to the response message */
253 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
254 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
255 void (*clear_stats)(struct cifs_tcon *);
256 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
257 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
258 /* verify the message */
259 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
260 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
261 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
262 void (*downgrade_oplock)(struct TCP_Server_Info *server,
263 struct cifsInodeInfo *cinode, __u32 oplock,
264 unsigned int epoch, bool *purge_cache);
265 /* process transaction2 response */
266 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
267 char *, int);
268 /* check if we need to negotiate */
269 bool (*need_neg)(struct TCP_Server_Info *);
270 /* negotiate to the server */
271 int (*negotiate)(const unsigned int, struct cifs_ses *);
272 /* set negotiated write size */
273 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
274 /* set negotiated read size */
275 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
276 /* setup smb sessionn */
277 int (*sess_setup)(const unsigned int, struct cifs_ses *,
278 const struct nls_table *);
279 /* close smb session */
280 int (*logoff)(const unsigned int, struct cifs_ses *);
281 /* connect to a server share */
282 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
283 struct cifs_tcon *, const struct nls_table *);
284 /* close tree connecion */
285 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
286 /* get DFS referrals */
287 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
288 const char *, struct dfs_info3_param **,
289 unsigned int *, const struct nls_table *, int);
290 /* informational QFS call */
291 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
292 /* check if a path is accessible or not */
293 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
294 struct cifs_sb_info *, const char *);
295 /* query path data from the server */
296 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
297 struct cifs_sb_info *, const char *,
298 FILE_ALL_INFO *, bool *, bool *);
299 /* query file data from the server */
300 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
301 struct cifs_fid *, FILE_ALL_INFO *);
302 /* get server index number */
303 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
304 struct cifs_sb_info *, const char *,
305 u64 *uniqueid, FILE_ALL_INFO *);
306 /* set size by path */
307 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
308 const char *, __u64, struct cifs_sb_info *, bool);
309 /* set size by file handle */
310 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
311 struct cifsFileInfo *, __u64, bool);
312 /* set attributes */
313 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
314 const unsigned int);
315 int (*set_compression)(const unsigned int, struct cifs_tcon *,
316 struct cifsFileInfo *);
317 /* check if we can send an echo or nor */
318 bool (*can_echo)(struct TCP_Server_Info *);
319 /* send echo request */
320 int (*echo)(struct TCP_Server_Info *);
321 /* create directory */
322 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
323 umode_t mode, struct cifs_tcon *tcon,
324 const char *full_path,
325 struct cifs_sb_info *cifs_sb);
326 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
327 struct cifs_sb_info *);
328 /* set info on created directory */
329 void (*mkdir_setinfo)(struct inode *, const char *,
330 struct cifs_sb_info *, struct cifs_tcon *,
331 const unsigned int);
332 /* remove directory */
333 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
334 struct cifs_sb_info *);
335 /* unlink file */
336 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
337 struct cifs_sb_info *);
338 /* open, rename and delete file */
339 int (*rename_pending_delete)(const char *, struct dentry *,
340 const unsigned int);
341 /* send rename request */
342 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
343 const char *, struct cifs_sb_info *);
344 /* send create hardlink request */
345 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
346 const char *, const char *,
347 struct cifs_sb_info *);
348 /* query symlink target */
349 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
350 const char *, char **, struct cifs_sb_info *);
351 /* open a file for non-posix mounts */
352 int (*open)(const unsigned int, struct cifs_open_parms *,
353 __u32 *, FILE_ALL_INFO *);
354 /* set fid protocol-specific info */
355 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
356 /* close a file */
357 void (*close)(const unsigned int, struct cifs_tcon *,
358 struct cifs_fid *);
359 /* send a flush request to the server */
360 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
361 /* async read from the server */
362 int (*async_readv)(struct cifs_readdata *);
363 /* async write to the server */
364 int (*async_writev)(struct cifs_writedata *,
365 void (*release)(struct kref *));
366 /* sync read from the server */
367 int (*sync_read)(const unsigned int, struct cifs_fid *,
368 struct cifs_io_parms *, unsigned int *, char **,
369 int *);
370 /* sync write to the server */
371 int (*sync_write)(const unsigned int, struct cifs_fid *,
372 struct cifs_io_parms *, unsigned int *, struct kvec *,
373 unsigned long);
374 /* open dir, start readdir */
375 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
376 const char *, struct cifs_sb_info *,
377 struct cifs_fid *, __u16,
378 struct cifs_search_info *);
379 /* continue readdir */
380 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
381 struct cifs_fid *,
382 __u16, struct cifs_search_info *srch_inf);
383 /* close dir */
384 int (*close_dir)(const unsigned int, struct cifs_tcon *,
385 struct cifs_fid *);
386 /* calculate a size of SMB message */
387 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
388 /* check for STATUS_PENDING and process it in a positive case */
389 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
390 /* check for STATUS_NETWORK_SESSION_EXPIRED */
391 bool (*is_session_expired)(char *);
392 /* send oplock break response */
393 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
394 struct cifsInodeInfo *);
395 /* query remote filesystem */
396 int (*queryfs)(const unsigned int, struct cifs_tcon *,
397 struct kstatfs *);
398 /* send mandatory brlock to the server */
399 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
400 __u64, __u32, int, int, bool);
401 /* unlock range of mandatory locks */
402 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
403 const unsigned int);
404 /* push brlocks from the cache to the server */
405 int (*push_mand_locks)(struct cifsFileInfo *);
406 /* get lease key of the inode */
407 void (*get_lease_key)(struct inode *, struct cifs_fid *);
408 /* set lease key of the inode */
409 void (*set_lease_key)(struct inode *, struct cifs_fid *);
410 /* generate new lease key */
411 void (*new_lease_key)(struct cifs_fid *);
412 int (*generate_signingkey)(struct cifs_ses *);
413 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
414 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
415 struct cifsFileInfo *src_file);
416 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
417 struct cifsFileInfo *src_file, void __user *);
418 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
419 struct cifs_sb_info *, const unsigned char *,
420 char *, unsigned int *);
421 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
422 struct cifs_sb_info *, const unsigned char *,
423 char *, unsigned int *);
424 /* if we can do cache read operations */
425 bool (*is_read_op)(__u32);
426 /* set oplock level for the inode */
427 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
428 bool *);
429 /* create lease context buffer for CREATE request */
430 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
431 /* parse lease context buffer and return oplock/epoch info */
432 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
433 ssize_t (*copychunk_range)(const unsigned int,
434 struct cifsFileInfo *src_file,
435 struct cifsFileInfo *target_file,
436 u64 src_off, u64 len, u64 dest_off);
437 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
438 struct cifsFileInfo *target_file, u64 src_off, u64 len,
439 u64 dest_off);
440 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
441 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
442 const unsigned char *, const unsigned char *, char *,
443 size_t, struct cifs_sb_info *);
444 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
445 const char *, const void *, const __u16,
446 const struct nls_table *, struct cifs_sb_info *);
447 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
448 const char *, u32 *);
449 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
450 const struct cifs_fid *, u32 *);
451 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
452 int);
453 /* writepages retry size */
454 unsigned int (*wp_retry_size)(struct inode *);
455 /* get mtu credits */
456 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
457 unsigned int *, unsigned int *);
458 /* check if we need to issue closedir */
459 bool (*dir_needs_close)(struct cifsFileInfo *);
460 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
461 loff_t);
462 /* init transform request - used for encryption for now */
463 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
464 struct smb_rqst *, struct smb_rqst *);
465 int (*is_transform_hdr)(void *buf);
466 int (*receive_transform)(struct TCP_Server_Info *,
467 struct mid_q_entry **, char **, int *);
468 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
469 enum securityEnum);
470 int (*next_header)(char *);
471 };
472
473 struct smb_version_values {
474 char *version_string;
475 __u16 protocol_id;
476 __u32 req_capabilities;
477 __u32 large_lock_type;
478 __u32 exclusive_lock_type;
479 __u32 shared_lock_type;
480 __u32 unlock_lock_type;
481 size_t header_preamble_size;
482 size_t header_size;
483 size_t max_header_size;
484 size_t read_rsp_size;
485 __le16 lock_cmd;
486 unsigned int cap_unix;
487 unsigned int cap_nt_find;
488 unsigned int cap_large_files;
489 __u16 signing_enabled;
490 __u16 signing_required;
491 size_t create_lease_size;
492 };
493
494 #define HEADER_SIZE(server) (server->vals->header_size)
495 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
496
497 struct smb_vol {
498 char *username;
499 char *password;
500 char *domainname;
501 char *UNC;
502 char *iocharset; /* local code page for mapping to and from Unicode */
503 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
504 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
505 kuid_t cred_uid;
506 kuid_t linux_uid;
507 kgid_t linux_gid;
508 kuid_t backupuid;
509 kgid_t backupgid;
510 umode_t file_mode;
511 umode_t dir_mode;
512 enum securityEnum sectype; /* sectype requested via mnt opts */
513 bool sign; /* was signing requested via mnt opts? */
514 bool retry:1;
515 bool intr:1;
516 bool setuids:1;
517 bool setuidfromacl:1;
518 bool override_uid:1;
519 bool override_gid:1;
520 bool dynperm:1;
521 bool noperm:1;
522 bool no_psx_acl:1; /* set if posix acl support should be disabled */
523 bool cifs_acl:1;
524 bool backupuid_specified; /* mount option backupuid is specified */
525 bool backupgid_specified; /* mount option backupgid is specified */
526 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
527 bool server_ino:1; /* use inode numbers from server ie UniqueId */
528 bool direct_io:1;
529 bool strict_io:1; /* strict cache behavior */
530 bool remap:1; /* set to remap seven reserved chars in filenames */
531 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
532 bool posix_paths:1; /* unset to not ask for posix pathnames. */
533 bool no_linux_ext:1;
534 bool linux_ext:1;
535 bool sfu_emul:1;
536 bool nullauth:1; /* attempt to authenticate with null user */
537 bool nocase:1; /* request case insensitive filenames */
538 bool nobrl:1; /* disable sending byte range locks to srv */
539 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
540 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
541 bool seal:1; /* request transport encryption on share */
542 bool nodfs:1; /* Do not request DFS, even if available */
543 bool local_lease:1; /* check leases only on local system, not remote */
544 bool noblocksnd:1;
545 bool noautotune:1;
546 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
547 bool no_lease:1; /* disable requesting leases */
548 bool fsc:1; /* enable fscache */
549 bool mfsymlinks:1; /* use Minshall+French Symlinks */
550 bool multiuser:1;
551 bool rwpidforward:1; /* pid forward for read/write operations */
552 bool nosharesock:1;
553 bool persistent:1;
554 bool nopersistent:1;
555 bool resilient:1; /* noresilient not required since not fored for CA */
556 bool domainauto:1;
557 bool rdma:1;
558 unsigned int rsize;
559 unsigned int wsize;
560 bool sockopt_tcp_nodelay:1;
561 unsigned long actimeo; /* attribute cache timeout (jiffies) */
562 struct smb_version_operations *ops;
563 struct smb_version_values *vals;
564 char *prepath;
565 struct sockaddr_storage dstaddr; /* destination address */
566 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
567 struct nls_table *local_nls;
568 unsigned int echo_interval; /* echo interval in secs */
569 __u64 snapshot_time; /* needed for timewarp tokens */
570 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
571 };
572
573 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
574 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
575 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
576 CIFS_MOUNT_MAP_SFM_CHR | \
577 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
578 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
579 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
580 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
581 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
582 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
583 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
584
585 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
586 SB_NODEV | SB_SYNCHRONOUS)
587
588 struct cifs_mnt_data {
589 struct cifs_sb_info *cifs_sb;
590 struct smb_vol *vol;
591 int flags;
592 };
593
594 static inline unsigned int
get_rfc1002_length(void * buf)595 get_rfc1002_length(void *buf)
596 {
597 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
598 }
599
600 static inline void
inc_rfc1001_len(void * buf,int count)601 inc_rfc1001_len(void *buf, int count)
602 {
603 be32_add_cpu((__be32 *)buf, count);
604 }
605
606 struct TCP_Server_Info {
607 struct list_head tcp_ses_list;
608 struct list_head smb_ses_list;
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 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 */
619 #ifdef CONFIG_NET_NS
620 struct net *net;
621 #endif
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 */
627 bool tcp_nodelay;
628 unsigned int credits; /* send no more requests at once */
629 unsigned int max_credits; /* can override large 32000 default at mnt */
630 unsigned int in_flight; /* number of requests on the wire to server */
631 spinlock_t req_lock; /* protect the two values above */
632 struct mutex srv_mutex;
633 struct task_struct *tsk;
634 char server_GUID[16];
635 __u16 sec_mode;
636 bool sign; /* is signing enabled on this connection? */
637 bool session_estab; /* mark when very first sess is established */
638 int echo_credits; /* echo reserved slots */
639 int oplock_credits; /* oplock break reserved slots */
640 bool echoes:1; /* enable echoes */
641 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
642 u16 dialect; /* dialect index that server chose */
643 bool oplocks:1; /* enable oplocks */
644 unsigned int maxReq; /* Clients should submit no more */
645 /* than maxReq distinct unanswered SMBs to the server when using */
646 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
647 unsigned int maxBuf; /* maxBuf specifies the maximum */
648 /* message size the server can send or receive for non-raw SMBs */
649 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
650 /* when socket is setup (and during reconnect) before NegProt sent */
651 unsigned int max_rw; /* maxRw specifies the maximum */
652 /* message size the server can send or receive for */
653 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
654 unsigned int capabilities; /* selective disabling of caps by smb sess */
655 int timeAdj; /* Adjust for difference in server time zone in sec */
656 __u64 CurrentMid; /* multiplex id - rotating counter */
657 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
658 /* 16th byte of RFC1001 workstation name is always null */
659 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
660 __u32 sequence_number; /* for signing, protected by srv_mutex */
661 struct session_key session_key;
662 unsigned long lstrp; /* when we got last response from this server */
663 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
664 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
665 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
666 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
667 char negflavor; /* NEGOTIATE response flavor */
668 /* extended security flavors that server supports */
669 bool sec_ntlmssp; /* supports NTLMSSP */
670 bool sec_kerberosu2u; /* supports U2U Kerberos */
671 bool sec_kerberos; /* supports plain Kerberos */
672 bool sec_mskerberos; /* supports legacy MS Kerberos */
673 bool large_buf; /* is current buffer large? */
674 /* use SMBD connection instead of socket */
675 bool rdma;
676 /* point to the SMBD connection if RDMA is used instead of socket */
677 struct smbd_connection *smbd_conn;
678 struct delayed_work echo; /* echo ping workqueue job */
679 char *smallbuf; /* pointer to current "small" buffer */
680 char *bigbuf; /* pointer to current "big" buffer */
681 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
682 unsigned int pdu_size;
683 unsigned int total_read; /* total amount of data read in this pass */
684 #ifdef CONFIG_CIFS_FSCACHE
685 struct fscache_cookie *fscache; /* client index cache cookie */
686 #endif
687 #ifdef CONFIG_CIFS_STATS2
688 atomic_t in_send; /* requests trying to send */
689 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
690 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
691 #endif /* STATS2 */
692 unsigned int max_read;
693 unsigned int max_write;
694 __le16 cipher_type;
695 /* save initital negprot hash */
696 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
697 bool posix_ext_supported;
698 struct delayed_work reconnect; /* reconnect workqueue job */
699 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
700 unsigned long echo_interval;
701 };
702
703 static inline unsigned int
in_flight(struct TCP_Server_Info * server)704 in_flight(struct TCP_Server_Info *server)
705 {
706 unsigned int num;
707 spin_lock(&server->req_lock);
708 num = server->in_flight;
709 spin_unlock(&server->req_lock);
710 return num;
711 }
712
713 static inline bool
has_credits(struct TCP_Server_Info * server,int * credits)714 has_credits(struct TCP_Server_Info *server, int *credits)
715 {
716 int num;
717 spin_lock(&server->req_lock);
718 num = *credits;
719 spin_unlock(&server->req_lock);
720 return num > 0;
721 }
722
723 static inline void
add_credits(struct TCP_Server_Info * server,const unsigned int add,const int optype)724 add_credits(struct TCP_Server_Info *server, const unsigned int add,
725 const int optype)
726 {
727 server->ops->add_credits(server, add, optype);
728 }
729
730 static inline void
add_credits_and_wake_if(struct TCP_Server_Info * server,const unsigned int add,const int optype)731 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
732 const int optype)
733 {
734 if (add) {
735 server->ops->add_credits(server, add, optype);
736 wake_up(&server->request_q);
737 }
738 }
739
740 static inline void
set_credits(struct TCP_Server_Info * server,const int val)741 set_credits(struct TCP_Server_Info *server, const int val)
742 {
743 server->ops->set_credits(server, val);
744 }
745
746 static inline __le64
get_next_mid64(struct TCP_Server_Info * server)747 get_next_mid64(struct TCP_Server_Info *server)
748 {
749 return cpu_to_le64(server->ops->get_next_mid(server));
750 }
751
752 static inline __le16
get_next_mid(struct TCP_Server_Info * server)753 get_next_mid(struct TCP_Server_Info *server)
754 {
755 __u16 mid = server->ops->get_next_mid(server);
756 /*
757 * The value in the SMB header should be little endian for easy
758 * on-the-wire decoding.
759 */
760 return cpu_to_le16(mid);
761 }
762
763 static inline void
revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)764 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
765 {
766 if (server->ops->revert_current_mid)
767 server->ops->revert_current_mid(server, val);
768 }
769
770 static inline void
revert_current_mid_from_hdr(struct TCP_Server_Info * server,const struct smb2_sync_hdr * shdr)771 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
772 const struct smb2_sync_hdr *shdr)
773 {
774 unsigned int num = le16_to_cpu(shdr->CreditCharge);
775
776 return revert_current_mid(server, num > 0 ? num : 1);
777 }
778
779 static inline __u16
get_mid(const struct smb_hdr * smb)780 get_mid(const struct smb_hdr *smb)
781 {
782 return le16_to_cpu(smb->Mid);
783 }
784
785 static inline bool
compare_mid(__u16 mid,const struct smb_hdr * smb)786 compare_mid(__u16 mid, const struct smb_hdr *smb)
787 {
788 return mid == le16_to_cpu(smb->Mid);
789 }
790
791 /*
792 * When the server supports very large reads and writes via POSIX extensions,
793 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
794 * including the RFC1001 length.
795 *
796 * Note that this might make for "interesting" allocation problems during
797 * writeback however as we have to allocate an array of pointers for the
798 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
799 *
800 * For reads, there is a similar problem as we need to allocate an array
801 * of kvecs to handle the receive, though that should only need to be done
802 * once.
803 */
804 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
805 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
806
807 /*
808 * When the server doesn't allow large posix writes, only allow a rsize/wsize
809 * of 2^17-1 minus the size of the call header. That allows for a read or
810 * write up to the maximum size described by RFC1002.
811 */
812 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
813 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
814
815 /*
816 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
817 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
818 * a single wsize request with a single call.
819 */
820 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
821
822 /*
823 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
824 * those values when posix extensions aren't in force. In actuality here, we
825 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
826 * to be ok with the extra byte even though Windows doesn't send writes that
827 * are that large.
828 *
829 * Citation:
830 *
831 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
832 */
833 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
834 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
835
836 /*
837 * Macros to allow the TCP_Server_Info->net field and related code to drop out
838 * when CONFIG_NET_NS isn't set.
839 */
840
841 #ifdef CONFIG_NET_NS
842
cifs_net_ns(struct TCP_Server_Info * srv)843 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
844 {
845 return srv->net;
846 }
847
cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)848 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
849 {
850 srv->net = net;
851 }
852
853 #else
854
cifs_net_ns(struct TCP_Server_Info * srv)855 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
856 {
857 return &init_net;
858 }
859
cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)860 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
861 {
862 }
863
864 #endif
865
866 struct cifs_server_iface {
867 size_t speed;
868 unsigned int rdma_capable : 1;
869 unsigned int rss_capable : 1;
870 struct sockaddr_storage sockaddr;
871 };
872
873 /*
874 * Session structure. One of these for each uid session with a particular host
875 */
876 struct cifs_ses {
877 struct list_head smb_ses_list;
878 struct list_head tcon_list;
879 struct cifs_tcon *tcon_ipc;
880 struct mutex session_mutex;
881 struct TCP_Server_Info *server; /* pointer to server info */
882 int ses_count; /* reference counter */
883 enum statusEnum status;
884 unsigned overrideSecFlg; /* if non-zero override global sec flags */
885 char *serverOS; /* name of operating system underlying server */
886 char *serverNOS; /* name of network operating system of server */
887 char *serverDomain; /* security realm of server */
888 __u64 Suid; /* remote smb uid */
889 kuid_t linux_uid; /* overriding owner of files on the mount */
890 kuid_t cred_uid; /* owner of credentials */
891 unsigned int capabilities;
892 char serverName[SERVER_NAME_LEN_WITH_NULL];
893 char *user_name; /* must not be null except during init of sess
894 and after mount option parsing we fill it */
895 char *domainName;
896 char *password;
897 struct session_key auth_key;
898 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
899 enum securityEnum sectype; /* what security flavor was specified? */
900 bool sign; /* is signing required? */
901 bool need_reconnect:1; /* connection reset, uid now invalid */
902 bool domainAuto:1;
903 __u16 session_flags;
904 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
905 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
906 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
907 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
908
909 /*
910 * Network interfaces available on the server this session is
911 * connected to.
912 *
913 * Other channels can be opened by connecting and binding this
914 * session to interfaces from this list.
915 *
916 * iface_lock should be taken when accessing any of these fields
917 */
918 spinlock_t iface_lock;
919 struct cifs_server_iface *iface_list;
920 size_t iface_count;
921 unsigned long iface_last_update; /* jiffies */
922 };
923
924 static inline bool
cap_unix(struct cifs_ses * ses)925 cap_unix(struct cifs_ses *ses)
926 {
927 return ses->server->vals->cap_unix & ses->capabilities;
928 }
929
930 struct cached_fid {
931 bool is_valid:1; /* Do we have a useable root fid */
932 struct kref refcount;
933 struct cifs_fid *fid;
934 struct mutex fid_mutex;
935 struct cifs_tcon *tcon;
936 struct work_struct lease_break;
937 };
938
939 /*
940 * there is one of these for each connection to a resource on a particular
941 * session
942 */
943 struct cifs_tcon {
944 struct list_head tcon_list;
945 int tc_count;
946 struct list_head rlist; /* reconnect list */
947 struct list_head openFileList;
948 spinlock_t open_file_lock; /* protects list above */
949 struct cifs_ses *ses; /* pointer to session associated with */
950 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
951 char *nativeFileSystem;
952 char *password; /* for share-level security */
953 __u32 tid; /* The 4 byte tree id */
954 __u16 Flags; /* optional support bits */
955 enum statusEnum tidStatus;
956 atomic_t num_smbs_sent;
957 union {
958 struct {
959 atomic_t num_writes;
960 atomic_t num_reads;
961 atomic_t num_flushes;
962 atomic_t num_oplock_brks;
963 atomic_t num_opens;
964 atomic_t num_closes;
965 atomic_t num_deletes;
966 atomic_t num_mkdirs;
967 atomic_t num_posixopens;
968 atomic_t num_posixmkdirs;
969 atomic_t num_rmdirs;
970 atomic_t num_renames;
971 atomic_t num_t2renames;
972 atomic_t num_ffirst;
973 atomic_t num_fnext;
974 atomic_t num_fclose;
975 atomic_t num_hardlinks;
976 atomic_t num_symlinks;
977 atomic_t num_locks;
978 atomic_t num_acl_get;
979 atomic_t num_acl_set;
980 } cifs_stats;
981 struct {
982 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
983 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
984 } smb2_stats;
985 } stats;
986 __u64 bytes_read;
987 __u64 bytes_written;
988 spinlock_t stat_lock; /* protects the two fields above */
989 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
990 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
991 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
992 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
993 bool pipe:1; /* set if connection to pipe share */
994 bool print:1; /* set if connection to printer share */
995 bool retry:1;
996 bool nocase:1;
997 bool nohandlecache:1; /* if strange server resource prob can turn off */
998 bool seal:1; /* transport encryption for this mounted share */
999 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1000 for this mount even if server would support */
1001 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1002 bool local_lease:1; /* check leases (only) on local system not remote */
1003 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1004 bool broken_sparse_sup; /* if server or share does not support sparse */
1005 bool need_reconnect:1; /* connection reset, tid now invalid */
1006 bool need_reopen_files:1; /* need to reopen tcon file handles */
1007 bool use_resilient:1; /* use resilient instead of durable handles */
1008 bool use_persistent:1; /* use persistent instead of durable handles */
1009 bool no_lease:1; /* Do not request leases on files or directories */
1010 __le32 capabilities;
1011 __u32 share_flags;
1012 __u32 maximal_access;
1013 __u32 vol_serial_number;
1014 __le64 vol_create_time;
1015 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1016 __u32 ss_flags; /* sector size flags */
1017 __u32 perf_sector_size; /* best sector size for perf */
1018 __u32 max_chunks;
1019 __u32 max_bytes_chunk;
1020 __u32 max_bytes_copy;
1021 #ifdef CONFIG_CIFS_FSCACHE
1022 u64 resource_id; /* server resource id */
1023 struct fscache_cookie *fscache; /* cookie for share */
1024 #endif
1025 struct list_head pending_opens; /* list of incomplete opens */
1026 struct cached_fid crfid; /* Cached root fid */
1027 /* BB add field for back pointer to sb struct(s)? */
1028 };
1029
1030 /*
1031 * This is a refcounted and timestamped container for a tcon pointer. The
1032 * container holds a tcon reference. It is considered safe to free one of
1033 * these when the tl_count goes to 0. The tl_time is the time of the last
1034 * "get" on the container.
1035 */
1036 struct tcon_link {
1037 struct rb_node tl_rbnode;
1038 kuid_t tl_uid;
1039 unsigned long tl_flags;
1040 #define TCON_LINK_MASTER 0
1041 #define TCON_LINK_PENDING 1
1042 #define TCON_LINK_IN_TREE 2
1043 unsigned long tl_time;
1044 atomic_t tl_count;
1045 struct cifs_tcon *tl_tcon;
1046 };
1047
1048 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1049 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1050
1051 static inline struct cifs_tcon *
tlink_tcon(struct tcon_link * tlink)1052 tlink_tcon(struct tcon_link *tlink)
1053 {
1054 return tlink->tl_tcon;
1055 }
1056
1057 static inline struct tcon_link *
cifs_sb_master_tlink(struct cifs_sb_info * cifs_sb)1058 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1059 {
1060 return cifs_sb->master_tlink;
1061 }
1062
1063 extern void cifs_put_tlink(struct tcon_link *tlink);
1064
1065 static inline struct tcon_link *
cifs_get_tlink(struct tcon_link * tlink)1066 cifs_get_tlink(struct tcon_link *tlink)
1067 {
1068 if (tlink && !IS_ERR(tlink))
1069 atomic_inc(&tlink->tl_count);
1070 return tlink;
1071 }
1072
1073 /* This function is always expected to succeed */
1074 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1075
1076 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1077
1078 struct cifs_pending_open {
1079 struct list_head olist;
1080 struct tcon_link *tlink;
1081 __u8 lease_key[16];
1082 __u32 oplock;
1083 };
1084
1085 /*
1086 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1087 * This is used to track byte stream locks on the file
1088 */
1089 struct cifsLockInfo {
1090 struct list_head llist; /* pointer to next cifsLockInfo */
1091 struct list_head blist; /* pointer to locks blocked on this */
1092 wait_queue_head_t block_q;
1093 __u64 offset;
1094 __u64 length;
1095 __u32 pid;
1096 __u32 type;
1097 };
1098
1099 /*
1100 * One of these for each open instance of a file
1101 */
1102 struct cifs_search_info {
1103 loff_t index_of_last_entry;
1104 __u16 entries_in_buffer;
1105 __u16 info_level;
1106 __u32 resume_key;
1107 char *ntwrk_buf_start;
1108 char *srch_entries_start;
1109 char *last_entry;
1110 const char *presume_name;
1111 unsigned int resume_name_len;
1112 bool endOfSearch:1;
1113 bool emptyDir:1;
1114 bool unicode:1;
1115 bool smallBuf:1; /* so we know which buf_release function to call */
1116 };
1117
1118 struct cifs_open_parms {
1119 struct cifs_tcon *tcon;
1120 struct cifs_sb_info *cifs_sb;
1121 int disposition;
1122 int desired_access;
1123 int create_options;
1124 const char *path;
1125 struct cifs_fid *fid;
1126 umode_t mode;
1127 bool reconnect:1;
1128 };
1129
1130 struct cifs_fid {
1131 __u16 netfid;
1132 __u64 persistent_fid; /* persist file id for smb2 */
1133 __u64 volatile_fid; /* volatile file id for smb2 */
1134 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1135 __u8 create_guid[16];
1136 struct cifs_pending_open *pending_open;
1137 unsigned int epoch;
1138 bool purge_cache;
1139 };
1140
1141 struct cifs_fid_locks {
1142 struct list_head llist;
1143 struct cifsFileInfo *cfile; /* fid that owns locks */
1144 struct list_head locks; /* locks held by fid above */
1145 };
1146
1147 struct cifsFileInfo {
1148 /* following two lists are protected by tcon->open_file_lock */
1149 struct list_head tlist; /* pointer to next fid owned by tcon */
1150 struct list_head flist; /* next fid (file instance) for this inode */
1151 /* lock list below protected by cifsi->lock_sem */
1152 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1153 kuid_t uid; /* allows finding which FileInfo structure */
1154 __u32 pid; /* process id who opened file */
1155 struct cifs_fid fid; /* file id from remote */
1156 struct list_head rlist; /* reconnect list */
1157 /* BB add lock scope info here if needed */ ;
1158 /* lock scope id (0 if none) */
1159 struct dentry *dentry;
1160 struct tcon_link *tlink;
1161 unsigned int f_flags;
1162 bool invalidHandle:1; /* file closed via session abend */
1163 bool oplock_break_cancelled:1;
1164 unsigned int oplock_epoch; /* epoch from the lease break */
1165 __u32 oplock_level; /* oplock/lease level from the lease break */
1166 int count;
1167 spinlock_t file_info_lock; /* protects four flag/count fields above */
1168 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1169 struct cifs_search_info srch_inf;
1170 struct work_struct oplock_break; /* work for oplock breaks */
1171 };
1172
1173 struct cifs_io_parms {
1174 __u16 netfid;
1175 __u64 persistent_fid; /* persist file id for smb2 */
1176 __u64 volatile_fid; /* volatile file id for smb2 */
1177 __u32 pid;
1178 __u64 offset;
1179 unsigned int length;
1180 struct cifs_tcon *tcon;
1181 };
1182
1183 struct cifs_aio_ctx {
1184 struct kref refcount;
1185 struct list_head list;
1186 struct mutex aio_mutex;
1187 struct completion done;
1188 struct iov_iter iter;
1189 struct kiocb *iocb;
1190 struct cifsFileInfo *cfile;
1191 struct bio_vec *bv;
1192 loff_t pos;
1193 unsigned int npages;
1194 ssize_t rc;
1195 unsigned int len;
1196 unsigned int total_len;
1197 bool should_dirty;
1198 };
1199
1200 struct cifs_readdata;
1201
1202 /* asynchronous read support */
1203 struct cifs_readdata {
1204 struct kref refcount;
1205 struct list_head list;
1206 struct completion done;
1207 struct cifsFileInfo *cfile;
1208 struct address_space *mapping;
1209 struct cifs_aio_ctx *ctx;
1210 __u64 offset;
1211 unsigned int bytes;
1212 unsigned int got_bytes;
1213 pid_t pid;
1214 int result;
1215 struct work_struct work;
1216 int (*read_into_pages)(struct TCP_Server_Info *server,
1217 struct cifs_readdata *rdata,
1218 unsigned int len);
1219 int (*copy_into_pages)(struct TCP_Server_Info *server,
1220 struct cifs_readdata *rdata,
1221 struct iov_iter *iter);
1222 struct kvec iov[2];
1223 #ifdef CONFIG_CIFS_SMB_DIRECT
1224 struct smbd_mr *mr;
1225 #endif
1226 unsigned int pagesz;
1227 unsigned int page_offset;
1228 unsigned int tailsz;
1229 unsigned int credits;
1230 unsigned int nr_pages;
1231 struct page **pages;
1232 };
1233
1234 struct cifs_writedata;
1235
1236 /* asynchronous write support */
1237 struct cifs_writedata {
1238 struct kref refcount;
1239 struct list_head list;
1240 struct completion done;
1241 enum writeback_sync_modes sync_mode;
1242 struct work_struct work;
1243 struct cifsFileInfo *cfile;
1244 struct cifs_aio_ctx *ctx;
1245 __u64 offset;
1246 pid_t pid;
1247 unsigned int bytes;
1248 int result;
1249 #ifdef CONFIG_CIFS_SMB_DIRECT
1250 struct smbd_mr *mr;
1251 #endif
1252 unsigned int pagesz;
1253 unsigned int page_offset;
1254 unsigned int tailsz;
1255 unsigned int credits;
1256 unsigned int nr_pages;
1257 struct page **pages;
1258 };
1259
1260 /*
1261 * Take a reference on the file private data. Must be called with
1262 * cfile->file_info_lock held.
1263 */
1264 static inline void
cifsFileInfo_get_locked(struct cifsFileInfo * cifs_file)1265 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1266 {
1267 ++cifs_file->count;
1268 }
1269
1270 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1271 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr);
1272 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1273
1274 #define CIFS_CACHE_READ_FLG 1
1275 #define CIFS_CACHE_HANDLE_FLG 2
1276 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1277 #define CIFS_CACHE_WRITE_FLG 4
1278 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1279 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1280
1281 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1282 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1283 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1284
1285 /*
1286 * One of these for each file inode
1287 */
1288
1289 struct cifsInodeInfo {
1290 bool can_cache_brlcks;
1291 struct list_head llist; /* locks helb by this inode */
1292 /*
1293 * NOTE: Some code paths call down_read(lock_sem) twice, so
1294 * we must always use use cifs_down_write() instead of down_write()
1295 * for this semaphore to avoid deadlocks.
1296 */
1297 struct rw_semaphore lock_sem; /* protect the fields above */
1298 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1299 struct list_head openFileList;
1300 spinlock_t open_file_lock; /* protects openFileList */
1301 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1302 unsigned int oplock; /* oplock/lease level we have */
1303 unsigned int epoch; /* used to track lease state changes */
1304 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1305 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1306 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1307 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1308 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1309 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1310 unsigned long flags;
1311 spinlock_t writers_lock;
1312 unsigned int writers; /* Number of writers on this inode */
1313 unsigned long time; /* jiffies of last update of inode */
1314 u64 server_eof; /* current file size on server -- protected by i_lock */
1315 u64 uniqueid; /* server inode number */
1316 u64 createtime; /* creation time on server */
1317 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1318 #ifdef CONFIG_CIFS_FSCACHE
1319 struct fscache_cookie *fscache;
1320 #endif
1321 struct inode vfs_inode;
1322 };
1323
1324 static inline struct cifsInodeInfo *
CIFS_I(struct inode * inode)1325 CIFS_I(struct inode *inode)
1326 {
1327 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1328 }
1329
1330 static inline struct cifs_sb_info *
CIFS_SB(struct super_block * sb)1331 CIFS_SB(struct super_block *sb)
1332 {
1333 return sb->s_fs_info;
1334 }
1335
1336 static inline struct cifs_sb_info *
CIFS_FILE_SB(struct file * file)1337 CIFS_FILE_SB(struct file *file)
1338 {
1339 return CIFS_SB(file_inode(file)->i_sb);
1340 }
1341
CIFS_DIR_SEP(const struct cifs_sb_info * cifs_sb)1342 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1343 {
1344 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1345 return '/';
1346 else
1347 return '\\';
1348 }
1349
1350 static inline void
convert_delimiter(char * path,char delim)1351 convert_delimiter(char *path, char delim)
1352 {
1353 char old_delim, *pos;
1354
1355 if (delim == '/')
1356 old_delim = '\\';
1357 else
1358 old_delim = '/';
1359
1360 pos = path;
1361 while ((pos = strchr(pos, old_delim)))
1362 *pos = delim;
1363 }
1364
1365 #define cifs_stats_inc atomic_inc
1366
cifs_stats_bytes_written(struct cifs_tcon * tcon,unsigned int bytes)1367 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1368 unsigned int bytes)
1369 {
1370 if (bytes) {
1371 spin_lock(&tcon->stat_lock);
1372 tcon->bytes_written += bytes;
1373 spin_unlock(&tcon->stat_lock);
1374 }
1375 }
1376
cifs_stats_bytes_read(struct cifs_tcon * tcon,unsigned int bytes)1377 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1378 unsigned int bytes)
1379 {
1380 spin_lock(&tcon->stat_lock);
1381 tcon->bytes_read += bytes;
1382 spin_unlock(&tcon->stat_lock);
1383 }
1384
1385
1386 /*
1387 * This is the prototype for the mid receive function. This function is for
1388 * receiving the rest of the SMB frame, starting with the WordCount (which is
1389 * just after the MID in struct smb_hdr). Note:
1390 *
1391 * - This will be called by cifsd, with no locks held.
1392 * - The mid will still be on the pending_mid_q.
1393 * - mid->resp_buf will point to the current buffer.
1394 *
1395 * Returns zero on a successful receive, or an error. The receive state in
1396 * the TCP_Server_Info will also be updated.
1397 */
1398 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1399 struct mid_q_entry *mid);
1400
1401 /*
1402 * This is the prototype for the mid callback function. This is called once the
1403 * mid has been received off of the socket. When creating one, take special
1404 * care to avoid deadlocks. Things to bear in mind:
1405 *
1406 * - it will be called by cifsd, with no locks held
1407 * - the mid will be removed from any lists
1408 */
1409 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1410
1411 /*
1412 * This is the protopyte for mid handle function. This is called once the mid
1413 * has been recognized after decryption of the message.
1414 */
1415 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1416 struct mid_q_entry *mid);
1417
1418 /* one of these for every pending CIFS request to the server */
1419 struct mid_q_entry {
1420 struct list_head qhead; /* mids waiting on reply from this server */
1421 struct kref refcount;
1422 struct TCP_Server_Info *server; /* server corresponding to this mid */
1423 __u64 mid; /* multiplex id */
1424 __u16 credits; /* number of credits consumed by this mid */
1425 __u32 pid; /* process id */
1426 __u32 sequence_number; /* for CIFS signing */
1427 unsigned long when_alloc; /* when mid was created */
1428 #ifdef CONFIG_CIFS_STATS2
1429 unsigned long when_sent; /* time when smb send finished */
1430 unsigned long when_received; /* when demux complete (taken off wire) */
1431 #endif
1432 mid_receive_t *receive; /* call receive callback */
1433 mid_callback_t *callback; /* call completion callback */
1434 mid_handle_t *handle; /* call handle mid callback */
1435 void *callback_data; /* general purpose pointer for callback */
1436 void *resp_buf; /* pointer to received SMB header */
1437 unsigned int resp_buf_size;
1438 int mid_state; /* wish this were enum but can not pass to wait_event */
1439 unsigned int mid_flags;
1440 __le16 command; /* smb command code */
1441 bool large_buf:1; /* if valid response, is pointer to large buf */
1442 bool multiRsp:1; /* multiple trans2 responses for one request */
1443 bool multiEnd:1; /* both received */
1444 bool decrypted:1; /* decrypted entry */
1445 };
1446
1447 struct close_cancelled_open {
1448 struct cifs_fid fid;
1449 struct cifs_tcon *tcon;
1450 struct work_struct work;
1451 };
1452
1453 /* Make code in transport.c a little cleaner by moving
1454 update of optional stats into function below */
1455 #ifdef CONFIG_CIFS_STATS2
1456
cifs_in_send_inc(struct TCP_Server_Info * server)1457 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1458 {
1459 atomic_inc(&server->in_send);
1460 }
1461
cifs_in_send_dec(struct TCP_Server_Info * server)1462 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1463 {
1464 atomic_dec(&server->in_send);
1465 }
1466
cifs_num_waiters_inc(struct TCP_Server_Info * server)1467 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1468 {
1469 atomic_inc(&server->num_waiters);
1470 }
1471
cifs_num_waiters_dec(struct TCP_Server_Info * server)1472 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1473 {
1474 atomic_dec(&server->num_waiters);
1475 }
1476
cifs_save_when_sent(struct mid_q_entry * mid)1477 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1478 {
1479 mid->when_sent = jiffies;
1480 }
1481 #else
cifs_in_send_inc(struct TCP_Server_Info * server)1482 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1483 {
1484 }
cifs_in_send_dec(struct TCP_Server_Info * server)1485 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1486 {
1487 }
1488
cifs_num_waiters_inc(struct TCP_Server_Info * server)1489 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1490 {
1491 }
1492
cifs_num_waiters_dec(struct TCP_Server_Info * server)1493 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1494 {
1495 }
1496
cifs_save_when_sent(struct mid_q_entry * mid)1497 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1498 {
1499 }
1500 #endif
1501
1502 /* for pending dnotify requests */
1503 struct dir_notify_req {
1504 struct list_head lhead;
1505 __le16 Pid;
1506 __le16 PidHigh;
1507 __u16 Mid;
1508 __u16 Tid;
1509 __u16 Uid;
1510 __u16 netfid;
1511 __u32 filter; /* CompletionFilter (for multishot) */
1512 int multishot;
1513 struct file *pfile;
1514 };
1515
1516 struct dfs_info3_param {
1517 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1518 int path_consumed;
1519 int server_type;
1520 int ref_flag;
1521 char *path_name;
1522 char *node_name;
1523 };
1524
1525 /*
1526 * common struct for holding inode info when searching for or updating an
1527 * inode with new info
1528 */
1529
1530 #define CIFS_FATTR_DFS_REFERRAL 0x1
1531 #define CIFS_FATTR_DELETE_PENDING 0x2
1532 #define CIFS_FATTR_NEED_REVAL 0x4
1533 #define CIFS_FATTR_INO_COLLISION 0x8
1534 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1535 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1536
1537 struct cifs_fattr {
1538 u32 cf_flags;
1539 u32 cf_cifsattrs;
1540 u64 cf_uniqueid;
1541 u64 cf_eof;
1542 u64 cf_bytes;
1543 u64 cf_createtime;
1544 kuid_t cf_uid;
1545 kgid_t cf_gid;
1546 umode_t cf_mode;
1547 dev_t cf_rdev;
1548 unsigned int cf_nlink;
1549 unsigned int cf_dtype;
1550 struct timespec64 cf_atime;
1551 struct timespec64 cf_mtime;
1552 struct timespec64 cf_ctime;
1553 };
1554
free_dfs_info_param(struct dfs_info3_param * param)1555 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1556 {
1557 if (param) {
1558 kfree(param->path_name);
1559 kfree(param->node_name);
1560 kfree(param);
1561 }
1562 }
1563
free_dfs_info_array(struct dfs_info3_param * param,int number_of_items)1564 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1565 int number_of_items)
1566 {
1567 int i;
1568 if ((number_of_items == 0) || (param == NULL))
1569 return;
1570 for (i = 0; i < number_of_items; i++) {
1571 kfree(param[i].path_name);
1572 kfree(param[i].node_name);
1573 }
1574 kfree(param);
1575 }
1576
is_interrupt_error(int error)1577 static inline bool is_interrupt_error(int error)
1578 {
1579 switch (error) {
1580 case -EINTR:
1581 case -ERESTARTSYS:
1582 case -ERESTARTNOHAND:
1583 case -ERESTARTNOINTR:
1584 return true;
1585 }
1586 return false;
1587 }
1588
is_retryable_error(int error)1589 static inline bool is_retryable_error(int error)
1590 {
1591 if (is_interrupt_error(error) || error == -EAGAIN)
1592 return true;
1593 return false;
1594 }
1595
1596 #define MID_FREE 0
1597 #define MID_REQUEST_ALLOCATED 1
1598 #define MID_REQUEST_SUBMITTED 2
1599 #define MID_RESPONSE_RECEIVED 4
1600 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1601 #define MID_RESPONSE_MALFORMED 0x10
1602 #define MID_SHUTDOWN 0x20
1603
1604 /* Flags */
1605 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1606 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1607
1608 /* Types of response buffer returned from SendReceive2 */
1609 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1610 #define CIFS_SMALL_BUFFER 1
1611 #define CIFS_LARGE_BUFFER 2
1612 #define CIFS_IOVEC 4 /* array of response buffers */
1613
1614 /* Type of Request to SendReceive2 */
1615 #define CIFS_BLOCKING_OP 1 /* operation can block */
1616 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1617 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1618 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1619 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1620 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1621
1622 /* Type of request operation */
1623 #define CIFS_ECHO_OP 0x080 /* echo request */
1624 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1625 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1626 #define CIFS_OP_MASK 0x0380 /* mask request type */
1627
1628 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1629 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1630
1631 /* Security Flags: indicate type of session setup needed */
1632 #define CIFSSEC_MAY_SIGN 0x00001
1633 #define CIFSSEC_MAY_NTLM 0x00002
1634 #define CIFSSEC_MAY_NTLMV2 0x00004
1635 #define CIFSSEC_MAY_KRB5 0x00008
1636 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1637 #define CIFSSEC_MAY_LANMAN 0x00010
1638 #define CIFSSEC_MAY_PLNTXT 0x00020
1639 #else
1640 #define CIFSSEC_MAY_LANMAN 0
1641 #define CIFSSEC_MAY_PLNTXT 0
1642 #endif /* weak passwords */
1643 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1644 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1645
1646 #define CIFSSEC_MUST_SIGN 0x01001
1647 /* note that only one of the following can be set so the
1648 result of setting MUST flags more than once will be to
1649 require use of the stronger protocol */
1650 #define CIFSSEC_MUST_NTLM 0x02002
1651 #define CIFSSEC_MUST_NTLMV2 0x04004
1652 #define CIFSSEC_MUST_KRB5 0x08008
1653 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1654 #define CIFSSEC_MUST_LANMAN 0x10010
1655 #define CIFSSEC_MUST_PLNTXT 0x20020
1656 #ifdef CONFIG_CIFS_UPCALL
1657 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1658 #else
1659 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1660 #endif /* UPCALL */
1661 #else /* do not allow weak pw hash */
1662 #define CIFSSEC_MUST_LANMAN 0
1663 #define CIFSSEC_MUST_PLNTXT 0
1664 #ifdef CONFIG_CIFS_UPCALL
1665 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1666 #else
1667 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1668 #endif /* UPCALL */
1669 #endif /* WEAK_PW_HASH */
1670 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1671 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1672
1673 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1674 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1675 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1676 /*
1677 *****************************************************************
1678 * All constants go here
1679 *****************************************************************
1680 */
1681
1682 #define UID_HASH (16)
1683
1684 /*
1685 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1686 * following to be declared.
1687 */
1688
1689 /****************************************************************************
1690 * Locking notes. All updates to global variables and lists should be
1691 * protected by spinlocks or semaphores.
1692 *
1693 * Spinlocks
1694 * ---------
1695 * GlobalMid_Lock protects:
1696 * list operations on pending_mid_q and oplockQ
1697 * updates to XID counters, multiplex id and SMB sequence numbers
1698 * tcp_ses_lock protects:
1699 * list operations on tcp and SMB session lists
1700 * tcon->open_file_lock protects the list of open files hanging off the tcon
1701 * inode->open_file_lock protects the openFileList hanging off the inode
1702 * cfile->file_info_lock protects counters and fields in cifs file struct
1703 * f_owner.lock protects certain per file struct operations
1704 * mapping->page_lock protects certain per page operations
1705 *
1706 * Note that the cifs_tcon.open_file_lock should be taken before
1707 * not after the cifsInodeInfo.open_file_lock
1708 *
1709 * Semaphores
1710 * ----------
1711 * sesSem operations on smb session
1712 * tconSem operations on tree connection
1713 * fh_sem file handle reconnection operations
1714 *
1715 ****************************************************************************/
1716
1717 #ifdef DECLARE_GLOBALS_HERE
1718 #define GLOBAL_EXTERN
1719 #else
1720 #define GLOBAL_EXTERN extern
1721 #endif
1722
1723 /*
1724 * the list of TCP_Server_Info structures, ie each of the sockets
1725 * connecting our client to a distinct server (ip address), is
1726 * chained together by cifs_tcp_ses_list. The list of all our SMB
1727 * sessions (and from that the tree connections) can be found
1728 * by iterating over cifs_tcp_ses_list
1729 */
1730 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1731
1732 /*
1733 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1734 * tcp session, and the list of tcon's per smb session. It also protects
1735 * the reference counters for the server, smb session, and tcon. Finally,
1736 * changes to the tcon->tidStatus should be done while holding this lock.
1737 * generally the locks should be taken in order tcp_ses_lock before
1738 * tcon->open_file_lock and that before file->file_info_lock since the
1739 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1740 */
1741 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1742
1743 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1744 /* Outstanding dir notify requests */
1745 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1746 /* DirNotify response queue */
1747 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1748 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1749
1750 /*
1751 * Global transaction id (XID) information
1752 */
1753 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1754 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1755 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1756 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1757 /* on midQ entries */
1758 /*
1759 * Global counters, updated atomically
1760 */
1761 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1762 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1763 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1764 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1765 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1766
1767 /* Various Debug counters */
1768 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1769 #ifdef CONFIG_CIFS_STATS2
1770 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1771 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1772 #endif
1773 GLOBAL_EXTERN atomic_t smBufAllocCount;
1774 GLOBAL_EXTERN atomic_t midCount;
1775
1776 /* Misc globals */
1777 extern bool enable_oplocks; /* enable or disable oplocks */
1778 extern bool lookupCacheEnabled;
1779 extern unsigned int global_secflags; /* if on, session setup sent
1780 with more secure ntlmssp2 challenge/resp */
1781 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1782 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1783 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1784 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1785 extern unsigned int cifs_min_small; /* min size of small buf pool */
1786 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1787 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1788
1789 #ifdef CONFIG_CIFS_ACL
1790 GLOBAL_EXTERN struct rb_root uidtree;
1791 GLOBAL_EXTERN struct rb_root gidtree;
1792 GLOBAL_EXTERN spinlock_t siduidlock;
1793 GLOBAL_EXTERN spinlock_t sidgidlock;
1794 GLOBAL_EXTERN struct rb_root siduidtree;
1795 GLOBAL_EXTERN struct rb_root sidgidtree;
1796 GLOBAL_EXTERN spinlock_t uidsidlock;
1797 GLOBAL_EXTERN spinlock_t gidsidlock;
1798 #endif /* CONFIG_CIFS_ACL */
1799
1800 void cifs_oplock_break(struct work_struct *work);
1801 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1802
1803 extern const struct slow_work_ops cifs_oplock_break_ops;
1804 extern struct workqueue_struct *cifsiod_wq;
1805 extern struct workqueue_struct *cifsoplockd_wq;
1806 extern __u32 cifs_lock_secret;
1807
1808 extern mempool_t *cifs_mid_poolp;
1809
1810 /* Operations for different SMB versions */
1811 #define SMB1_VERSION_STRING "1.0"
1812 extern struct smb_version_operations smb1_operations;
1813 extern struct smb_version_values smb1_values;
1814 #define SMB20_VERSION_STRING "2.0"
1815 extern struct smb_version_operations smb20_operations;
1816 extern struct smb_version_values smb20_values;
1817 #define SMB21_VERSION_STRING "2.1"
1818 extern struct smb_version_operations smb21_operations;
1819 extern struct smb_version_values smb21_values;
1820 #define SMBDEFAULT_VERSION_STRING "default"
1821 extern struct smb_version_values smbdefault_values;
1822 #define SMB3ANY_VERSION_STRING "3"
1823 extern struct smb_version_values smb3any_values;
1824 #define SMB30_VERSION_STRING "3.0"
1825 extern struct smb_version_operations smb30_operations;
1826 extern struct smb_version_values smb30_values;
1827 #define SMB302_VERSION_STRING "3.02"
1828 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1829 extern struct smb_version_values smb302_values;
1830 #define SMB311_VERSION_STRING "3.1.1"
1831 #define ALT_SMB311_VERSION_STRING "3.11"
1832 extern struct smb_version_operations smb311_operations;
1833 extern struct smb_version_values smb311_values;
1834 #endif /* _CIFS_GLOB_H */
1835