4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
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.
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.
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"
29 #include <crypto/internal/hash.h>
30 #include <linux/scatterlist.h>
31 #include <uapi/linux/cifs/cifs_mount.h>
32 #ifdef CONFIG_CIFS_SMB2
36 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
39 * The sizes of various internal tables and strings
41 #define MAX_UID_INFO 16
42 #define MAX_SES_INFO 2
43 #define MAX_TCON_INFO 4
45 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
47 #define CIFS_MIN_RCV_POOL 4
49 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
51 * default attribute cache timeout (jiffies)
53 #define CIFS_DEF_ACTIMEO (1 * HZ)
56 * max attribute cache timeout (jiffies) - 2^30
58 #define CIFS_MAX_ACTIMEO (1 << 30)
61 * MAX_REQ is the maximum number of requests that WE will send
62 * on one socket concurrently.
64 #define CIFS_MAX_REQ 32767
66 #define RFC1001_NAME_LEN 15
67 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69 /* currently length of NIP6_FMT */
70 #define SERVER_NAME_LENGTH 40
71 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73 /* used to define string lengths for reversing unicode strings */
75 /* (max path length + 1 for null) * 2 for unicode */
78 /* SMB echo "timeout" -- FIXME: tunable? */
79 #define SMB_ECHO_INTERVAL (60 * HZ)
83 #ifndef XATTR_DOS_ATTRIB
84 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
88 * CIFS vfs client Status information (based on what we know.)
91 /* associated with each tcp and smb session */
101 Unspecified = 0, /* not specified */
102 LANMAN, /* Legacy LANMAN auth */
103 NTLM, /* Legacy NTLM012 auth with NTLM hash */
104 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
105 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
106 Kerberos, /* Kerberos via SPNEGO */
114 /* crypto security descriptor definition */
116 struct shash_desc shash;
120 /* crypto hashing related structure/fields, not specific to a sec mech */
121 struct cifs_secmech {
122 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
123 struct crypto_shash *md5; /* md5 hash function */
124 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
125 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
126 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
127 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
128 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
129 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
132 /* per smb session structure/fields */
133 struct ntlmssp_auth {
134 bool sesskey_per_smbsess; /* whether session key is per smb session */
135 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
136 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
137 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
138 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
146 struct cifs_sid osid;
147 struct cifs_sid gsid;
148 struct cifs_ntace *ntaces;
149 struct cifs_ace *aces;
153 *****************************************************************
154 * Except the CIFS PDUs themselves all the
155 * globally interesting structs should go here
156 *****************************************************************
160 * A smb_rqst represents a complete request to be issued to a server. It's
161 * formed by a kvec array, followed by an array of pages. Page data is assumed
162 * to start at the beginning of the first page.
165 struct kvec *rq_iov; /* array of kvecs */
166 unsigned int rq_nvec; /* number of kvecs in array */
167 struct page **rq_pages; /* pointer to array of page ptrs */
168 unsigned int rq_npages; /* number pages in array */
169 unsigned int rq_pagesz; /* page size to use */
170 unsigned int rq_tailsz; /* length of last page */
182 struct TCP_Server_Info;
186 struct dfs_info3_param;
190 struct cifs_readdata;
191 struct cifs_writedata;
192 struct cifs_io_parms;
193 struct cifs_search_info;
194 struct cifsInodeInfo;
195 struct cifs_open_parms;
197 struct smb_version_operations {
198 int (*send_cancel)(struct TCP_Server_Info *, void *,
199 struct mid_q_entry *);
200 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
201 /* setup request: allocate mid, sign message */
202 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
204 /* setup async request: allocate mid, sign message */
205 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
207 /* check response: verify signature, map error */
208 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
210 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
212 void (*set_credits)(struct TCP_Server_Info *, const int);
213 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
214 unsigned int (*get_credits)(struct mid_q_entry *);
215 __u64 (*get_next_mid)(struct TCP_Server_Info *);
216 /* data offset from read response message */
217 unsigned int (*read_data_offset)(char *);
218 /* data length from read response message */
219 unsigned int (*read_data_length)(char *);
220 /* map smb to linux error */
221 int (*map_error)(char *, bool);
222 /* find mid corresponding to the response message */
223 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
224 void (*dump_detail)(void *);
225 void (*clear_stats)(struct cifs_tcon *);
226 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
227 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
228 /* verify the message */
229 int (*check_message)(char *, unsigned int);
230 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
231 /* process transaction2 response */
232 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
234 /* check if we need to negotiate */
235 bool (*need_neg)(struct TCP_Server_Info *);
236 /* negotiate to the server */
237 int (*negotiate)(const unsigned int, struct cifs_ses *);
238 /* set negotiated write size */
239 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
240 /* set negotiated read size */
241 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
242 /* setup smb sessionn */
243 int (*sess_setup)(const unsigned int, struct cifs_ses *,
244 const struct nls_table *);
245 /* close smb session */
246 int (*logoff)(const unsigned int, struct cifs_ses *);
247 /* connect to a server share */
248 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
249 struct cifs_tcon *, const struct nls_table *);
250 /* close tree connecion */
251 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
252 /* get DFS referrals */
253 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
254 const char *, struct dfs_info3_param **,
255 unsigned int *, const struct nls_table *, int);
256 /* informational QFS call */
257 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
258 /* check if a path is accessible or not */
259 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
260 struct cifs_sb_info *, const char *);
261 /* query path data from the server */
262 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
263 struct cifs_sb_info *, const char *,
264 FILE_ALL_INFO *, bool *, bool *);
265 /* query file data from the server */
266 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
267 struct cifs_fid *, FILE_ALL_INFO *);
268 /* get server index number */
269 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
270 struct cifs_sb_info *, const char *,
271 u64 *uniqueid, FILE_ALL_INFO *);
272 /* set size by path */
273 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
274 const char *, __u64, struct cifs_sb_info *, bool);
275 /* set size by file handle */
276 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
277 struct cifsFileInfo *, __u64, bool);
279 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
281 int (*set_compression)(const unsigned int, struct cifs_tcon *,
282 struct cifsFileInfo *);
283 /* check if we can send an echo or nor */
284 bool (*can_echo)(struct TCP_Server_Info *);
285 /* send echo request */
286 int (*echo)(struct TCP_Server_Info *);
287 /* create directory */
288 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
289 struct cifs_sb_info *);
290 /* set info on created directory */
291 void (*mkdir_setinfo)(struct inode *, const char *,
292 struct cifs_sb_info *, struct cifs_tcon *,
294 /* remove directory */
295 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
298 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
299 struct cifs_sb_info *);
300 /* open, rename and delete file */
301 int (*rename_pending_delete)(const char *, struct dentry *,
303 /* send rename request */
304 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
305 const char *, struct cifs_sb_info *);
306 /* send create hardlink request */
307 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
308 const char *, const char *,
309 struct cifs_sb_info *);
310 /* query symlink target */
311 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
312 const char *, char **, struct cifs_sb_info *);
313 /* open a file for non-posix mounts */
314 int (*open)(const unsigned int, struct cifs_open_parms *,
315 __u32 *, FILE_ALL_INFO *);
316 /* set fid protocol-specific info */
317 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
319 void (*close)(const unsigned int, struct cifs_tcon *,
321 /* send a flush request to the server */
322 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
323 /* async read from the server */
324 int (*async_readv)(struct cifs_readdata *);
325 /* async write to the server */
326 int (*async_writev)(struct cifs_writedata *,
327 void (*release)(struct kref *));
328 /* sync read from the server */
329 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
330 struct cifs_io_parms *, unsigned int *, char **,
332 /* sync write to the server */
333 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
334 struct cifs_io_parms *, unsigned int *, struct kvec *,
336 /* open dir, start readdir */
337 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
338 const char *, struct cifs_sb_info *,
339 struct cifs_fid *, __u16,
340 struct cifs_search_info *);
341 /* continue readdir */
342 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
344 __u16, struct cifs_search_info *srch_inf);
346 int (*close_dir)(const unsigned int, struct cifs_tcon *,
348 /* calculate a size of SMB message */
349 unsigned int (*calc_smb_size)(void *);
350 /* check for STATUS_PENDING and process it in a positive case */
351 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
352 /* send oplock break response */
353 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
354 struct cifsInodeInfo *);
355 /* query remote filesystem */
356 int (*queryfs)(const unsigned int, struct cifs_tcon *,
358 /* send mandatory brlock to the server */
359 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
360 __u64, __u32, int, int, bool);
361 /* unlock range of mandatory locks */
362 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
364 /* push brlocks from the cache to the server */
365 int (*push_mand_locks)(struct cifsFileInfo *);
366 /* get lease key of the inode */
367 void (*get_lease_key)(struct inode *, struct cifs_fid *);
368 /* set lease key of the inode */
369 void (*set_lease_key)(struct inode *, struct cifs_fid *);
370 /* generate new lease key */
371 void (*new_lease_key)(struct cifs_fid *);
372 int (*generate_signingkey)(struct cifs_ses *);
373 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
374 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
375 struct cifs_sb_info *, const unsigned char *,
376 char *, unsigned int *);
377 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
378 struct cifs_sb_info *, const unsigned char *,
379 char *, unsigned int *);
380 /* if we can do cache read operations */
381 bool (*is_read_op)(__u32);
382 /* set oplock level for the inode */
383 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
385 /* create lease context buffer for CREATE request */
386 char * (*create_lease_buf)(u8 *, u8);
387 /* parse lease context buffer and return oplock/epoch info */
388 __u8 (*parse_lease_buf)(void *, unsigned int *);
389 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
390 struct cifsFileInfo *target_file, u64 src_off, u64 len,
392 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
393 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
394 const unsigned char *, const unsigned char *, char *,
395 size_t, const struct nls_table *, int);
396 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
397 const char *, const void *, const __u16,
398 const struct nls_table *, int);
399 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
400 const char *, u32 *);
401 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
405 struct smb_version_values {
406 char *version_string;
408 __u32 req_capabilities;
409 __u32 large_lock_type;
410 __u32 exclusive_lock_type;
411 __u32 shared_lock_type;
412 __u32 unlock_lock_type;
414 size_t max_header_size;
415 size_t read_rsp_size;
417 unsigned int cap_unix;
418 unsigned int cap_nt_find;
419 unsigned int cap_large_files;
420 __u16 signing_enabled;
421 __u16 signing_required;
422 size_t create_lease_size;
425 #define HEADER_SIZE(server) (server->vals->header_size)
426 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
433 char *iocharset; /* local code page for mapping to and from Unicode */
434 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
435 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
443 enum securityEnum sectype; /* sectype requested via mnt opts */
444 bool sign; /* was signing requested via mnt opts? */
452 bool no_psx_acl:1; /* set if posix acl support should be disabled */
454 bool backupuid_specified; /* mount option backupuid is specified */
455 bool backupgid_specified; /* mount option backupgid is specified */
456 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
457 bool server_ino:1; /* use inode numbers from server ie UniqueId */
459 bool strict_io:1; /* strict cache behavior */
460 bool remap:1; /* set to remap seven reserved chars in filenames */
461 bool posix_paths:1; /* unset to not ask for posix pathnames. */
464 bool nullauth:1; /* attempt to authenticate with null user */
465 bool nocase:1; /* request case insensitive filenames */
466 bool nobrl:1; /* disable sending byte range locks to srv */
467 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
468 bool seal:1; /* request transport encryption on share */
469 bool nodfs:1; /* Do not request DFS, even if available */
470 bool local_lease:1; /* check leases only on local system, not remote */
473 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
474 bool fsc:1; /* enable fscache */
475 bool mfsymlinks:1; /* use Minshall+French Symlinks */
477 bool rwpidforward:1; /* pid forward for read/write operations */
481 bool sockopt_tcp_nodelay:1;
482 unsigned long actimeo; /* attribute cache timeout (jiffies) */
483 struct smb_version_operations *ops;
484 struct smb_version_values *vals;
486 struct sockaddr_storage dstaddr; /* destination address */
487 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
488 struct nls_table *local_nls;
491 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
492 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
493 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
494 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
495 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
496 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
497 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
498 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
499 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
500 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
502 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
503 MS_NODEV | MS_SYNCHRONOUS)
505 struct cifs_mnt_data {
506 struct cifs_sb_info *cifs_sb;
511 static inline unsigned int
512 get_rfc1002_length(void *buf)
514 return be32_to_cpu(*((__be32 *)buf));
518 inc_rfc1001_len(void *buf, int count)
520 be32_add_cpu((__be32 *)buf, count);
523 struct TCP_Server_Info {
524 struct list_head tcp_ses_list;
525 struct list_head smb_ses_list;
526 int srv_count; /* reference counter */
527 /* 15 character server name + 0x20 16th byte indicating type = srv */
528 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
529 struct smb_version_operations *ops;
530 struct smb_version_values *vals;
531 enum statusEnum tcpStatus; /* what we think the status is */
532 char *hostname; /* hostname portion of UNC string */
533 struct socket *ssocket;
534 struct sockaddr_storage dstaddr;
535 struct sockaddr_storage srcaddr; /* locally bind to this IP */
539 wait_queue_head_t response_q;
540 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
541 struct list_head pending_mid_q;
542 bool noblocksnd; /* use blocking sendmsg */
543 bool noautotune; /* do not autotune send buf sizes */
545 int credits; /* send no more requests at once */
546 unsigned int in_flight; /* number of requests on the wire to server */
547 spinlock_t req_lock; /* protect the two values above */
548 struct mutex srv_mutex;
549 struct task_struct *tsk;
550 char server_GUID[16];
552 bool sign; /* is signing enabled on this connection? */
553 bool session_estab; /* mark when very first sess is established */
554 #ifdef CONFIG_CIFS_SMB2
555 int echo_credits; /* echo reserved slots */
556 int oplock_credits; /* oplock break reserved slots */
557 bool echoes:1; /* enable echoes */
559 u16 dialect; /* dialect index that server chose */
560 bool oplocks:1; /* enable oplocks */
561 unsigned int maxReq; /* Clients should submit no more */
562 /* than maxReq distinct unanswered SMBs to the server when using */
563 /* multiplexed reads or writes */
564 unsigned int maxBuf; /* maxBuf specifies the maximum */
565 /* message size the server can send or receive for non-raw SMBs */
566 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
567 /* when socket is setup (and during reconnect) before NegProt sent */
568 unsigned int max_rw; /* maxRw specifies the maximum */
569 /* message size the server can send or receive for */
570 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
571 unsigned int capabilities; /* selective disabling of caps by smb sess */
572 int timeAdj; /* Adjust for difference in server time zone in sec */
573 __u64 CurrentMid; /* multiplex id - rotating counter */
574 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
575 /* 16th byte of RFC1001 workstation name is always null */
576 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
577 __u32 sequence_number; /* for signing, protected by srv_mutex */
578 struct session_key session_key;
579 unsigned long lstrp; /* when we got last response from this server */
580 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
581 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
582 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
583 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
584 char negflavor; /* NEGOTIATE response flavor */
585 /* extended security flavors that server supports */
586 bool sec_ntlmssp; /* supports NTLMSSP */
587 bool sec_kerberosu2u; /* supports U2U Kerberos */
588 bool sec_kerberos; /* supports plain Kerberos */
589 bool sec_mskerberos; /* supports legacy MS Kerberos */
590 bool large_buf; /* is current buffer large? */
591 struct delayed_work echo; /* echo ping workqueue job */
592 struct kvec *iov; /* reusable kvec array for receives */
593 unsigned int nr_iov; /* number of kvecs in array */
594 char *smallbuf; /* pointer to current "small" buffer */
595 char *bigbuf; /* pointer to current "big" buffer */
596 unsigned int total_read; /* total amount of data read in this pass */
597 #ifdef CONFIG_CIFS_FSCACHE
598 struct fscache_cookie *fscache; /* client index cache cookie */
600 #ifdef CONFIG_CIFS_STATS2
601 atomic_t in_send; /* requests trying to send */
602 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
604 #ifdef CONFIG_CIFS_SMB2
605 unsigned int max_read;
606 unsigned int max_write;
607 #endif /* CONFIG_CIFS_SMB2 */
610 static inline unsigned int
611 in_flight(struct TCP_Server_Info *server)
614 spin_lock(&server->req_lock);
615 num = server->in_flight;
616 spin_unlock(&server->req_lock);
621 has_credits(struct TCP_Server_Info *server, int *credits)
624 spin_lock(&server->req_lock);
626 spin_unlock(&server->req_lock);
631 add_credits(struct TCP_Server_Info *server, const unsigned int add,
634 server->ops->add_credits(server, add, optype);
638 set_credits(struct TCP_Server_Info *server, const int val)
640 server->ops->set_credits(server, val);
644 get_next_mid64(struct TCP_Server_Info *server)
646 return server->ops->get_next_mid(server);
650 get_next_mid(struct TCP_Server_Info *server)
652 __u16 mid = get_next_mid64(server);
654 * The value in the SMB header should be little endian for easy
655 * on-the-wire decoding.
657 return cpu_to_le16(mid);
661 get_mid(const struct smb_hdr *smb)
663 return le16_to_cpu(smb->Mid);
667 compare_mid(__u16 mid, const struct smb_hdr *smb)
669 return mid == le16_to_cpu(smb->Mid);
673 * When the server supports very large reads and writes via POSIX extensions,
674 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
675 * including the RFC1001 length.
677 * Note that this might make for "interesting" allocation problems during
678 * writeback however as we have to allocate an array of pointers for the
679 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
681 * For reads, there is a similar problem as we need to allocate an array
682 * of kvecs to handle the receive, though that should only need to be done
685 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
686 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
689 * When the server doesn't allow large posix writes, only allow a rsize/wsize
690 * of 2^17-1 minus the size of the call header. That allows for a read or
691 * write up to the maximum size described by RFC1002.
693 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
694 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
697 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
698 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
699 * a single wsize request with a single call.
701 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
704 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
705 * those values when posix extensions aren't in force. In actuality here, we
706 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
707 * to be ok with the extra byte even though Windows doesn't send writes that
712 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
714 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
715 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
718 * Macros to allow the TCP_Server_Info->net field and related code to drop out
719 * when CONFIG_NET_NS isn't set.
724 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
729 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
736 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
741 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
748 * Session structure. One of these for each uid session with a particular host
751 struct list_head smb_ses_list;
752 struct list_head tcon_list;
753 struct mutex session_mutex;
754 struct TCP_Server_Info *server; /* pointer to server info */
755 int ses_count; /* reference counter */
756 enum statusEnum status;
757 unsigned overrideSecFlg; /* if non-zero override global sec flags */
758 __u16 ipc_tid; /* special tid for connection to IPC share */
759 char *serverOS; /* name of operating system underlying server */
760 char *serverNOS; /* name of network operating system of server */
761 char *serverDomain; /* security realm of server */
762 __u64 Suid; /* remote smb uid */
763 kuid_t linux_uid; /* overriding owner of files on the mount */
764 kuid_t cred_uid; /* owner of credentials */
765 unsigned int capabilities;
766 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
767 TCP names - will ipv6 and sctp addresses fit? */
768 char *user_name; /* must not be null except during init of sess
769 and after mount option parsing we fill it */
772 struct session_key auth_key;
773 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
774 enum securityEnum sectype; /* what security flavor was specified? */
775 bool sign; /* is signing required? */
776 bool need_reconnect:1; /* connection reset, uid now invalid */
777 #ifdef CONFIG_CIFS_SMB2
779 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
780 #endif /* CONFIG_CIFS_SMB2 */
784 cap_unix(struct cifs_ses *ses)
786 return ses->server->vals->cap_unix & ses->capabilities;
790 * there is one of these for each connection to a resource on a particular
794 struct list_head tcon_list;
796 struct list_head openFileList;
797 struct cifs_ses *ses; /* pointer to session associated with */
798 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
799 char *nativeFileSystem;
800 char *password; /* for share-level security */
801 __u32 tid; /* The 4 byte tree id */
802 __u16 Flags; /* optional support bits */
803 enum statusEnum tidStatus;
804 #ifdef CONFIG_CIFS_STATS
805 atomic_t num_smbs_sent;
810 atomic_t num_flushes;
811 atomic_t num_oplock_brks;
814 atomic_t num_deletes;
816 atomic_t num_posixopens;
817 atomic_t num_posixmkdirs;
819 atomic_t num_renames;
820 atomic_t num_t2renames;
824 atomic_t num_hardlinks;
825 atomic_t num_symlinks;
827 atomic_t num_acl_get;
828 atomic_t num_acl_set;
830 #ifdef CONFIG_CIFS_SMB2
832 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
833 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
835 #endif /* CONFIG_CIFS_SMB2 */
837 #ifdef CONFIG_CIFS_STATS2
838 unsigned long long time_writes;
839 unsigned long long time_reads;
840 unsigned long long time_opens;
841 unsigned long long time_deletes;
842 unsigned long long time_closes;
843 unsigned long long time_mkdirs;
844 unsigned long long time_rmdirs;
845 unsigned long long time_renames;
846 unsigned long long time_t2renames;
847 unsigned long long time_ffirst;
848 unsigned long long time_fnext;
849 unsigned long long time_fclose;
850 #endif /* CONFIG_CIFS_STATS2 */
853 spinlock_t stat_lock;
854 #endif /* CONFIG_CIFS_STATS */
855 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
856 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
857 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
858 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
861 bool seal:1; /* transport encryption for this mounted share */
862 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
863 for this mount even if server would support */
864 bool local_lease:1; /* check leases (only) on local system not remote */
865 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
866 bool need_reconnect:1; /* connection reset, tid now invalid */
867 #ifdef CONFIG_CIFS_SMB2
868 bool print:1; /* set if connection to printer share */
869 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
872 __u32 maximal_access;
873 __u32 vol_serial_number;
874 __le64 vol_create_time;
875 __u32 ss_flags; /* sector size flags */
876 __u32 perf_sector_size; /* best sector size for perf */
878 __u32 max_bytes_chunk;
879 __u32 max_bytes_copy;
880 #endif /* CONFIG_CIFS_SMB2 */
881 #ifdef CONFIG_CIFS_FSCACHE
882 u64 resource_id; /* server resource id */
883 struct fscache_cookie *fscache; /* cookie for share */
885 struct list_head pending_opens; /* list of incomplete opens */
886 /* BB add field for back pointer to sb struct(s)? */
890 * This is a refcounted and timestamped container for a tcon pointer. The
891 * container holds a tcon reference. It is considered safe to free one of
892 * these when the tl_count goes to 0. The tl_time is the time of the last
893 * "get" on the container.
896 struct rb_node tl_rbnode;
898 unsigned long tl_flags;
899 #define TCON_LINK_MASTER 0
900 #define TCON_LINK_PENDING 1
901 #define TCON_LINK_IN_TREE 2
902 unsigned long tl_time;
904 struct cifs_tcon *tl_tcon;
907 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
909 static inline struct cifs_tcon *
910 tlink_tcon(struct tcon_link *tlink)
912 return tlink->tl_tcon;
915 extern void cifs_put_tlink(struct tcon_link *tlink);
917 static inline struct tcon_link *
918 cifs_get_tlink(struct tcon_link *tlink)
920 if (tlink && !IS_ERR(tlink))
921 atomic_inc(&tlink->tl_count);
925 /* This function is always expected to succeed */
926 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
928 #define CIFS_OPLOCK_NO_CHANGE 0xfe
930 struct cifs_pending_open {
931 struct list_head olist;
932 struct tcon_link *tlink;
938 * This info hangs off the cifsFileInfo structure, pointed to by llist.
939 * This is used to track byte stream locks on the file
941 struct cifsLockInfo {
942 struct list_head llist; /* pointer to next cifsLockInfo */
943 struct list_head blist; /* pointer to locks blocked on this */
944 wait_queue_head_t block_q;
952 * One of these for each open instance of a file
954 struct cifs_search_info {
955 loff_t index_of_last_entry;
956 __u16 entries_in_buffer;
959 char *ntwrk_buf_start;
960 char *srch_entries_start;
962 const char *presume_name;
963 unsigned int resume_name_len;
967 bool smallBuf:1; /* so we know which buf_release function to call */
970 struct cifs_open_parms {
971 struct cifs_tcon *tcon;
972 struct cifs_sb_info *cifs_sb;
977 struct cifs_fid *fid;
983 #ifdef CONFIG_CIFS_SMB2
984 __u64 persistent_fid; /* persist file id for smb2 */
985 __u64 volatile_fid; /* volatile file id for smb2 */
986 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
988 struct cifs_pending_open *pending_open;
993 struct cifs_fid_locks {
994 struct list_head llist;
995 struct cifsFileInfo *cfile; /* fid that owns locks */
996 struct list_head locks; /* locks held by fid above */
999 struct cifsFileInfo {
1000 struct list_head tlist; /* pointer to next fid owned by tcon */
1001 struct list_head flist; /* next fid (file instance) for this inode */
1002 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1003 kuid_t uid; /* allows finding which FileInfo structure */
1004 __u32 pid; /* process id who opened file */
1005 struct cifs_fid fid; /* file id from remote */
1006 /* BB add lock scope info here if needed */ ;
1007 /* lock scope id (0 if none) */
1008 struct dentry *dentry;
1009 unsigned int f_flags;
1010 struct tcon_link *tlink;
1011 bool invalidHandle:1; /* file closed via session abend */
1012 bool oplock_break_cancelled:1;
1013 int count; /* refcount protected by cifs_file_list_lock */
1014 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1015 struct cifs_search_info srch_inf;
1016 struct work_struct oplock_break; /* work for oplock breaks */
1019 struct cifs_io_parms {
1021 #ifdef CONFIG_CIFS_SMB2
1022 __u64 persistent_fid; /* persist file id for smb2 */
1023 __u64 volatile_fid; /* volatile file id for smb2 */
1027 unsigned int length;
1028 struct cifs_tcon *tcon;
1031 struct cifs_readdata;
1033 /* asynchronous read support */
1034 struct cifs_readdata {
1035 struct kref refcount;
1036 struct list_head list;
1037 struct completion done;
1038 struct cifsFileInfo *cfile;
1039 struct address_space *mapping;
1044 struct work_struct work;
1045 int (*read_into_pages)(struct TCP_Server_Info *server,
1046 struct cifs_readdata *rdata,
1049 unsigned int pagesz;
1050 unsigned int tailsz;
1051 unsigned int nr_pages;
1052 struct page *pages[];
1055 struct cifs_writedata;
1057 /* asynchronous write support */
1058 struct cifs_writedata {
1059 struct kref refcount;
1060 struct list_head list;
1061 struct completion done;
1062 enum writeback_sync_modes sync_mode;
1063 struct work_struct work;
1064 struct cifsFileInfo *cfile;
1069 unsigned int pagesz;
1070 unsigned int tailsz;
1071 unsigned int nr_pages;
1072 struct page *pages[];
1076 * Take a reference on the file private data. Must be called with
1077 * cifs_file_list_lock held.
1080 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1085 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1086 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1088 #define CIFS_CACHE_READ_FLG 1
1089 #define CIFS_CACHE_HANDLE_FLG 2
1090 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1091 #define CIFS_CACHE_WRITE_FLG 4
1092 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1093 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1095 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1096 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1097 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1100 * One of these for each file inode
1103 struct cifsInodeInfo {
1104 bool can_cache_brlcks;
1105 struct list_head llist; /* locks helb by this inode */
1106 struct rw_semaphore lock_sem; /* protect the fields above */
1107 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1108 struct list_head openFileList;
1109 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1110 unsigned int oplock; /* oplock/lease level we have */
1111 unsigned int epoch; /* used to track lease state changes */
1112 bool delete_pending; /* DELETE_ON_CLOSE is set */
1113 bool invalid_mapping; /* pagecache is invalid */
1114 unsigned long time; /* jiffies of last update of inode */
1115 u64 server_eof; /* current file size on server -- protected by i_lock */
1116 u64 uniqueid; /* server inode number */
1117 u64 createtime; /* creation time on server */
1118 #ifdef CONFIG_CIFS_SMB2
1119 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1121 #ifdef CONFIG_CIFS_FSCACHE
1122 struct fscache_cookie *fscache;
1124 struct inode vfs_inode;
1127 static inline struct cifsInodeInfo *
1128 CIFS_I(struct inode *inode)
1130 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1133 static inline struct cifs_sb_info *
1134 CIFS_SB(struct super_block *sb)
1136 return sb->s_fs_info;
1139 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1141 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1148 convert_delimiter(char *path, char delim)
1150 char old_delim, *pos;
1158 while ((pos = strchr(pos, old_delim)))
1162 #ifdef CONFIG_CIFS_STATS
1163 #define cifs_stats_inc atomic_inc
1165 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1169 spin_lock(&tcon->stat_lock);
1170 tcon->bytes_written += bytes;
1171 spin_unlock(&tcon->stat_lock);
1175 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1178 spin_lock(&tcon->stat_lock);
1179 tcon->bytes_read += bytes;
1180 spin_unlock(&tcon->stat_lock);
1184 #define cifs_stats_inc(field) do {} while (0)
1185 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1186 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1192 * This is the prototype for the mid receive function. This function is for
1193 * receiving the rest of the SMB frame, starting with the WordCount (which is
1194 * just after the MID in struct smb_hdr). Note:
1196 * - This will be called by cifsd, with no locks held.
1197 * - The mid will still be on the pending_mid_q.
1198 * - mid->resp_buf will point to the current buffer.
1200 * Returns zero on a successful receive, or an error. The receive state in
1201 * the TCP_Server_Info will also be updated.
1203 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1204 struct mid_q_entry *mid);
1207 * This is the prototype for the mid callback function. This is called once the
1208 * mid has been received off of the socket. When creating one, take special
1209 * care to avoid deadlocks. Things to bear in mind:
1211 * - it will be called by cifsd, with no locks held
1212 * - the mid will be removed from any lists
1214 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1216 /* one of these for every pending CIFS request to the server */
1217 struct mid_q_entry {
1218 struct list_head qhead; /* mids waiting on reply from this server */
1219 struct TCP_Server_Info *server; /* server corresponding to this mid */
1220 __u64 mid; /* multiplex id */
1221 __u32 pid; /* process id */
1222 __u32 sequence_number; /* for CIFS signing */
1223 unsigned long when_alloc; /* when mid was created */
1224 #ifdef CONFIG_CIFS_STATS2
1225 unsigned long when_sent; /* time when smb send finished */
1226 unsigned long when_received; /* when demux complete (taken off wire) */
1228 mid_receive_t *receive; /* call receive callback */
1229 mid_callback_t *callback; /* call completion callback */
1230 void *callback_data; /* general purpose pointer for callback */
1231 void *resp_buf; /* pointer to received SMB header */
1232 int mid_state; /* wish this were enum but can not pass to wait_event */
1233 __le16 command; /* smb command code */
1234 bool large_buf:1; /* if valid response, is pointer to large buf */
1235 bool multiRsp:1; /* multiple trans2 responses for one request */
1236 bool multiEnd:1; /* both received */
1239 /* Make code in transport.c a little cleaner by moving
1240 update of optional stats into function below */
1241 #ifdef CONFIG_CIFS_STATS2
1243 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1245 atomic_inc(&server->in_send);
1248 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1250 atomic_dec(&server->in_send);
1253 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1255 atomic_inc(&server->num_waiters);
1258 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1260 atomic_dec(&server->num_waiters);
1263 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1265 mid->when_sent = jiffies;
1268 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1271 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1275 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1279 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1283 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1288 /* for pending dnotify requests */
1289 struct dir_notify_req {
1290 struct list_head lhead;
1297 __u32 filter; /* CompletionFilter (for multishot) */
1302 struct dfs_info3_param {
1303 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1312 * common struct for holding inode info when searching for or updating an
1313 * inode with new info
1316 #define CIFS_FATTR_DFS_REFERRAL 0x1
1317 #define CIFS_FATTR_DELETE_PENDING 0x2
1318 #define CIFS_FATTR_NEED_REVAL 0x4
1319 #define CIFS_FATTR_INO_COLLISION 0x8
1320 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1333 unsigned int cf_nlink;
1334 unsigned int cf_dtype;
1335 struct timespec cf_atime;
1336 struct timespec cf_mtime;
1337 struct timespec cf_ctime;
1340 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1343 kfree(param->path_name);
1344 kfree(param->node_name);
1349 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1350 int number_of_items)
1353 if ((number_of_items == 0) || (param == NULL))
1355 for (i = 0; i < number_of_items; i++) {
1356 kfree(param[i].path_name);
1357 kfree(param[i].node_name);
1363 #define MID_REQUEST_ALLOCATED 1
1364 #define MID_REQUEST_SUBMITTED 2
1365 #define MID_RESPONSE_RECEIVED 4
1366 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1367 #define MID_RESPONSE_MALFORMED 0x10
1368 #define MID_SHUTDOWN 0x20
1370 /* Types of response buffer returned from SendReceive2 */
1371 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1372 #define CIFS_SMALL_BUFFER 1
1373 #define CIFS_LARGE_BUFFER 2
1374 #define CIFS_IOVEC 4 /* array of response buffers */
1376 /* Type of Request to SendReceive2 */
1377 #define CIFS_BLOCKING_OP 1 /* operation can block */
1378 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1379 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1380 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1381 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1382 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1384 /* Type of request operation */
1385 #define CIFS_ECHO_OP 0x080 /* echo request */
1386 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1387 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1388 #define CIFS_OP_MASK 0x0380 /* mask request type */
1390 /* Security Flags: indicate type of session setup needed */
1391 #define CIFSSEC_MAY_SIGN 0x00001
1392 #define CIFSSEC_MAY_NTLM 0x00002
1393 #define CIFSSEC_MAY_NTLMV2 0x00004
1394 #define CIFSSEC_MAY_KRB5 0x00008
1395 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1396 #define CIFSSEC_MAY_LANMAN 0x00010
1397 #define CIFSSEC_MAY_PLNTXT 0x00020
1399 #define CIFSSEC_MAY_LANMAN 0
1400 #define CIFSSEC_MAY_PLNTXT 0
1401 #endif /* weak passwords */
1402 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1403 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1405 #define CIFSSEC_MUST_SIGN 0x01001
1406 /* note that only one of the following can be set so the
1407 result of setting MUST flags more than once will be to
1408 require use of the stronger protocol */
1409 #define CIFSSEC_MUST_NTLM 0x02002
1410 #define CIFSSEC_MUST_NTLMV2 0x04004
1411 #define CIFSSEC_MUST_KRB5 0x08008
1412 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1413 #define CIFSSEC_MUST_LANMAN 0x10010
1414 #define CIFSSEC_MUST_PLNTXT 0x20020
1415 #ifdef CONFIG_CIFS_UPCALL
1416 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1418 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1420 #else /* do not allow weak pw hash */
1421 #define CIFSSEC_MUST_LANMAN 0
1422 #define CIFSSEC_MUST_PLNTXT 0
1423 #ifdef CONFIG_CIFS_UPCALL
1424 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1426 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1428 #endif /* WEAK_PW_HASH */
1429 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1430 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1432 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1433 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1434 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1436 *****************************************************************
1437 * All constants go here
1438 *****************************************************************
1441 #define UID_HASH (16)
1444 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1445 * following to be declared.
1448 /****************************************************************************
1449 * Locking notes. All updates to global variables and lists should be
1450 * protected by spinlocks or semaphores.
1454 * GlobalMid_Lock protects:
1455 * list operations on pending_mid_q and oplockQ
1456 * updates to XID counters, multiplex id and SMB sequence numbers
1457 * cifs_file_list_lock protects:
1458 * list operations on tcp and SMB session lists and tCon lists
1459 * f_owner.lock protects certain per file struct operations
1460 * mapping->page_lock protects certain per page operations
1464 * sesSem operations on smb session
1465 * tconSem operations on tree connection
1466 * fh_sem file handle reconnection operations
1468 ****************************************************************************/
1470 #ifdef DECLARE_GLOBALS_HERE
1471 #define GLOBAL_EXTERN
1473 #define GLOBAL_EXTERN extern
1477 * the list of TCP_Server_Info structures, ie each of the sockets
1478 * connecting our client to a distinct server (ip address), is
1479 * chained together by cifs_tcp_ses_list. The list of all our SMB
1480 * sessions (and from that the tree connections) can be found
1481 * by iterating over cifs_tcp_ses_list
1483 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1486 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1487 * tcp session, and the list of tcon's per smb session. It also protects
1488 * the reference counters for the server, smb session, and tcon. Finally,
1489 * changes to the tcon->tidStatus should be done while holding this lock.
1491 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1494 * This lock protects the cifs_file->llist and cifs_file->flist
1495 * list operations, and updates to some flags (cifs_file->invalidHandle)
1496 * It will be moved to either use the tcon->stat_lock or equivalent later.
1497 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1498 * the cifs_tcp_ses_lock must be grabbed first and released last.
1500 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1502 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1503 /* Outstanding dir notify requests */
1504 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1505 /* DirNotify response queue */
1506 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1507 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1510 * Global transaction id (XID) information
1512 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1513 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1514 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1515 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1516 /* on midQ entries */
1518 * Global counters, updated atomically
1520 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1521 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1522 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1523 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1524 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1526 /* Various Debug counters */
1527 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1528 #ifdef CONFIG_CIFS_STATS2
1529 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1530 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1532 GLOBAL_EXTERN atomic_t smBufAllocCount;
1533 GLOBAL_EXTERN atomic_t midCount;
1536 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1537 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1538 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1539 with more secure ntlmssp2 challenge/resp */
1540 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1541 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1542 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1543 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1544 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1545 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1547 #ifdef CONFIG_CIFS_ACL
1548 GLOBAL_EXTERN struct rb_root uidtree;
1549 GLOBAL_EXTERN struct rb_root gidtree;
1550 GLOBAL_EXTERN spinlock_t siduidlock;
1551 GLOBAL_EXTERN spinlock_t sidgidlock;
1552 GLOBAL_EXTERN struct rb_root siduidtree;
1553 GLOBAL_EXTERN struct rb_root sidgidtree;
1554 GLOBAL_EXTERN spinlock_t uidsidlock;
1555 GLOBAL_EXTERN spinlock_t gidsidlock;
1556 #endif /* CONFIG_CIFS_ACL */
1558 void cifs_oplock_break(struct work_struct *work);
1560 extern const struct slow_work_ops cifs_oplock_break_ops;
1561 extern struct workqueue_struct *cifsiod_wq;
1563 extern mempool_t *cifs_mid_poolp;
1565 /* Operations for different SMB versions */
1566 #define SMB1_VERSION_STRING "1.0"
1567 extern struct smb_version_operations smb1_operations;
1568 extern struct smb_version_values smb1_values;
1569 #define SMB20_VERSION_STRING "2.0"
1570 extern struct smb_version_operations smb20_operations;
1571 extern struct smb_version_values smb20_values;
1572 #define SMB21_VERSION_STRING "2.1"
1573 extern struct smb_version_operations smb21_operations;
1574 extern struct smb_version_values smb21_values;
1575 #define SMB30_VERSION_STRING "3.0"
1576 extern struct smb_version_operations smb30_operations;
1577 extern struct smb_version_values smb30_values;
1578 #define SMB302_VERSION_STRING "3.02"
1579 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1580 extern struct smb_version_values smb302_values;
1581 #endif /* _CIFS_GLOB_H */