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 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
402 const struct cifs_fid *, u32 *);
403 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
407 struct smb_version_values {
408 char *version_string;
410 __u32 req_capabilities;
411 __u32 large_lock_type;
412 __u32 exclusive_lock_type;
413 __u32 shared_lock_type;
414 __u32 unlock_lock_type;
416 size_t max_header_size;
417 size_t read_rsp_size;
419 unsigned int cap_unix;
420 unsigned int cap_nt_find;
421 unsigned int cap_large_files;
422 __u16 signing_enabled;
423 __u16 signing_required;
424 size_t create_lease_size;
427 #define HEADER_SIZE(server) (server->vals->header_size)
428 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
435 char *iocharset; /* local code page for mapping to and from Unicode */
436 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
437 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
445 enum securityEnum sectype; /* sectype requested via mnt opts */
446 bool sign; /* was signing requested via mnt opts? */
454 bool no_psx_acl:1; /* set if posix acl support should be disabled */
456 bool backupuid_specified; /* mount option backupuid is specified */
457 bool backupgid_specified; /* mount option backupgid is specified */
458 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
459 bool server_ino:1; /* use inode numbers from server ie UniqueId */
461 bool strict_io:1; /* strict cache behavior */
462 bool remap:1; /* set to remap seven reserved chars in filenames */
463 bool posix_paths:1; /* unset to not ask for posix pathnames. */
466 bool nullauth:1; /* attempt to authenticate with null user */
467 bool nocase:1; /* request case insensitive filenames */
468 bool nobrl:1; /* disable sending byte range locks to srv */
469 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
470 bool seal:1; /* request transport encryption on share */
471 bool nodfs:1; /* Do not request DFS, even if available */
472 bool local_lease:1; /* check leases only on local system, not remote */
475 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
476 bool fsc:1; /* enable fscache */
477 bool mfsymlinks:1; /* use Minshall+French Symlinks */
479 bool rwpidforward:1; /* pid forward for read/write operations */
483 bool sockopt_tcp_nodelay:1;
484 unsigned long actimeo; /* attribute cache timeout (jiffies) */
485 struct smb_version_operations *ops;
486 struct smb_version_values *vals;
488 struct sockaddr_storage dstaddr; /* destination address */
489 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
490 struct nls_table *local_nls;
493 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
494 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
495 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
496 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
497 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
498 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
499 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
500 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
501 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
502 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
504 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
505 MS_NODEV | MS_SYNCHRONOUS)
507 struct cifs_mnt_data {
508 struct cifs_sb_info *cifs_sb;
513 static inline unsigned int
514 get_rfc1002_length(void *buf)
516 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
520 inc_rfc1001_len(void *buf, int count)
522 be32_add_cpu((__be32 *)buf, count);
525 struct TCP_Server_Info {
526 struct list_head tcp_ses_list;
527 struct list_head smb_ses_list;
528 int srv_count; /* reference counter */
529 /* 15 character server name + 0x20 16th byte indicating type = srv */
530 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
531 struct smb_version_operations *ops;
532 struct smb_version_values *vals;
533 enum statusEnum tcpStatus; /* what we think the status is */
534 char *hostname; /* hostname portion of UNC string */
535 struct socket *ssocket;
536 struct sockaddr_storage dstaddr;
537 struct sockaddr_storage srcaddr; /* locally bind to this IP */
541 wait_queue_head_t response_q;
542 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
543 struct list_head pending_mid_q;
544 bool noblocksnd; /* use blocking sendmsg */
545 bool noautotune; /* do not autotune send buf sizes */
547 int credits; /* send no more requests at once */
548 unsigned int in_flight; /* number of requests on the wire to server */
549 spinlock_t req_lock; /* protect the two values above */
550 struct mutex srv_mutex;
551 struct task_struct *tsk;
552 char server_GUID[16];
554 bool sign; /* is signing enabled on this connection? */
555 bool session_estab; /* mark when very first sess is established */
556 #ifdef CONFIG_CIFS_SMB2
557 int echo_credits; /* echo reserved slots */
558 int oplock_credits; /* oplock break reserved slots */
559 bool echoes:1; /* enable echoes */
561 u16 dialect; /* dialect index that server chose */
562 bool oplocks:1; /* enable oplocks */
563 unsigned int maxReq; /* Clients should submit no more */
564 /* than maxReq distinct unanswered SMBs to the server when using */
565 /* multiplexed reads or writes */
566 unsigned int maxBuf; /* maxBuf specifies the maximum */
567 /* message size the server can send or receive for non-raw SMBs */
568 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
569 /* when socket is setup (and during reconnect) before NegProt sent */
570 unsigned int max_rw; /* maxRw specifies the maximum */
571 /* message size the server can send or receive for */
572 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
573 unsigned int capabilities; /* selective disabling of caps by smb sess */
574 int timeAdj; /* Adjust for difference in server time zone in sec */
575 __u64 CurrentMid; /* multiplex id - rotating counter */
576 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
577 /* 16th byte of RFC1001 workstation name is always null */
578 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
579 __u32 sequence_number; /* for signing, protected by srv_mutex */
580 struct session_key session_key;
581 unsigned long lstrp; /* when we got last response from this server */
582 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
583 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
584 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
585 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
586 char negflavor; /* NEGOTIATE response flavor */
587 /* extended security flavors that server supports */
588 bool sec_ntlmssp; /* supports NTLMSSP */
589 bool sec_kerberosu2u; /* supports U2U Kerberos */
590 bool sec_kerberos; /* supports plain Kerberos */
591 bool sec_mskerberos; /* supports legacy MS Kerberos */
592 bool large_buf; /* is current buffer large? */
593 struct delayed_work echo; /* echo ping workqueue job */
594 struct kvec *iov; /* reusable kvec array for receives */
595 unsigned int nr_iov; /* number of kvecs in array */
596 char *smallbuf; /* pointer to current "small" buffer */
597 char *bigbuf; /* pointer to current "big" buffer */
598 unsigned int total_read; /* total amount of data read in this pass */
599 #ifdef CONFIG_CIFS_FSCACHE
600 struct fscache_cookie *fscache; /* client index cache cookie */
602 #ifdef CONFIG_CIFS_STATS2
603 atomic_t in_send; /* requests trying to send */
604 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
606 #ifdef CONFIG_CIFS_SMB2
607 unsigned int max_read;
608 unsigned int max_write;
609 #endif /* CONFIG_CIFS_SMB2 */
612 static inline unsigned int
613 in_flight(struct TCP_Server_Info *server)
616 spin_lock(&server->req_lock);
617 num = server->in_flight;
618 spin_unlock(&server->req_lock);
623 has_credits(struct TCP_Server_Info *server, int *credits)
626 spin_lock(&server->req_lock);
628 spin_unlock(&server->req_lock);
633 add_credits(struct TCP_Server_Info *server, const unsigned int add,
636 server->ops->add_credits(server, add, optype);
640 set_credits(struct TCP_Server_Info *server, const int val)
642 server->ops->set_credits(server, val);
646 get_next_mid64(struct TCP_Server_Info *server)
648 return server->ops->get_next_mid(server);
652 get_next_mid(struct TCP_Server_Info *server)
654 __u16 mid = get_next_mid64(server);
656 * The value in the SMB header should be little endian for easy
657 * on-the-wire decoding.
659 return cpu_to_le16(mid);
663 get_mid(const struct smb_hdr *smb)
665 return le16_to_cpu(smb->Mid);
669 compare_mid(__u16 mid, const struct smb_hdr *smb)
671 return mid == le16_to_cpu(smb->Mid);
675 * When the server supports very large reads and writes via POSIX extensions,
676 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
677 * including the RFC1001 length.
679 * Note that this might make for "interesting" allocation problems during
680 * writeback however as we have to allocate an array of pointers for the
681 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
683 * For reads, there is a similar problem as we need to allocate an array
684 * of kvecs to handle the receive, though that should only need to be done
687 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
688 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
691 * When the server doesn't allow large posix writes, only allow a rsize/wsize
692 * of 2^17-1 minus the size of the call header. That allows for a read or
693 * write up to the maximum size described by RFC1002.
695 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
696 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
699 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
700 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
701 * a single wsize request with a single call.
703 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
706 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
707 * those values when posix extensions aren't in force. In actuality here, we
708 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
709 * to be ok with the extra byte even though Windows doesn't send writes that
714 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
716 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
717 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
720 * Macros to allow the TCP_Server_Info->net field and related code to drop out
721 * when CONFIG_NET_NS isn't set.
726 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
731 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
738 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
743 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
750 * Session structure. One of these for each uid session with a particular host
753 struct list_head smb_ses_list;
754 struct list_head tcon_list;
755 struct mutex session_mutex;
756 struct TCP_Server_Info *server; /* pointer to server info */
757 int ses_count; /* reference counter */
758 enum statusEnum status;
759 unsigned overrideSecFlg; /* if non-zero override global sec flags */
760 __u16 ipc_tid; /* special tid for connection to IPC share */
761 char *serverOS; /* name of operating system underlying server */
762 char *serverNOS; /* name of network operating system of server */
763 char *serverDomain; /* security realm of server */
764 __u64 Suid; /* remote smb uid */
765 kuid_t linux_uid; /* overriding owner of files on the mount */
766 kuid_t cred_uid; /* owner of credentials */
767 unsigned int capabilities;
768 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
769 TCP names - will ipv6 and sctp addresses fit? */
770 char *user_name; /* must not be null except during init of sess
771 and after mount option parsing we fill it */
774 struct session_key auth_key;
775 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
776 enum securityEnum sectype; /* what security flavor was specified? */
777 bool sign; /* is signing required? */
778 bool need_reconnect:1; /* connection reset, uid now invalid */
779 #ifdef CONFIG_CIFS_SMB2
781 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
782 #endif /* CONFIG_CIFS_SMB2 */
786 cap_unix(struct cifs_ses *ses)
788 return ses->server->vals->cap_unix & ses->capabilities;
792 * there is one of these for each connection to a resource on a particular
796 struct list_head tcon_list;
798 struct list_head openFileList;
799 struct cifs_ses *ses; /* pointer to session associated with */
800 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
801 char *nativeFileSystem;
802 char *password; /* for share-level security */
803 __u32 tid; /* The 4 byte tree id */
804 __u16 Flags; /* optional support bits */
805 enum statusEnum tidStatus;
806 #ifdef CONFIG_CIFS_STATS
807 atomic_t num_smbs_sent;
812 atomic_t num_flushes;
813 atomic_t num_oplock_brks;
816 atomic_t num_deletes;
818 atomic_t num_posixopens;
819 atomic_t num_posixmkdirs;
821 atomic_t num_renames;
822 atomic_t num_t2renames;
826 atomic_t num_hardlinks;
827 atomic_t num_symlinks;
829 atomic_t num_acl_get;
830 atomic_t num_acl_set;
832 #ifdef CONFIG_CIFS_SMB2
834 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
835 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
837 #endif /* CONFIG_CIFS_SMB2 */
839 #ifdef CONFIG_CIFS_STATS2
840 unsigned long long time_writes;
841 unsigned long long time_reads;
842 unsigned long long time_opens;
843 unsigned long long time_deletes;
844 unsigned long long time_closes;
845 unsigned long long time_mkdirs;
846 unsigned long long time_rmdirs;
847 unsigned long long time_renames;
848 unsigned long long time_t2renames;
849 unsigned long long time_ffirst;
850 unsigned long long time_fnext;
851 unsigned long long time_fclose;
852 #endif /* CONFIG_CIFS_STATS2 */
855 spinlock_t stat_lock;
856 #endif /* CONFIG_CIFS_STATS */
857 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
858 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
859 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
860 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
863 bool seal:1; /* transport encryption for this mounted share */
864 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
865 for this mount even if server would support */
866 bool local_lease:1; /* check leases (only) on local system not remote */
867 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
868 bool need_reconnect:1; /* connection reset, tid now invalid */
869 #ifdef CONFIG_CIFS_SMB2
870 bool print:1; /* set if connection to printer share */
871 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
874 __u32 maximal_access;
875 __u32 vol_serial_number;
876 __le64 vol_create_time;
877 __u32 ss_flags; /* sector size flags */
878 __u32 perf_sector_size; /* best sector size for perf */
880 __u32 max_bytes_chunk;
881 __u32 max_bytes_copy;
882 #endif /* CONFIG_CIFS_SMB2 */
883 #ifdef CONFIG_CIFS_FSCACHE
884 u64 resource_id; /* server resource id */
885 struct fscache_cookie *fscache; /* cookie for share */
887 struct list_head pending_opens; /* list of incomplete opens */
888 /* BB add field for back pointer to sb struct(s)? */
892 * This is a refcounted and timestamped container for a tcon pointer. The
893 * container holds a tcon reference. It is considered safe to free one of
894 * these when the tl_count goes to 0. The tl_time is the time of the last
895 * "get" on the container.
898 struct rb_node tl_rbnode;
900 unsigned long tl_flags;
901 #define TCON_LINK_MASTER 0
902 #define TCON_LINK_PENDING 1
903 #define TCON_LINK_IN_TREE 2
904 unsigned long tl_time;
906 struct cifs_tcon *tl_tcon;
909 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
911 static inline struct cifs_tcon *
912 tlink_tcon(struct tcon_link *tlink)
914 return tlink->tl_tcon;
917 extern void cifs_put_tlink(struct tcon_link *tlink);
919 static inline struct tcon_link *
920 cifs_get_tlink(struct tcon_link *tlink)
922 if (tlink && !IS_ERR(tlink))
923 atomic_inc(&tlink->tl_count);
927 /* This function is always expected to succeed */
928 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
930 #define CIFS_OPLOCK_NO_CHANGE 0xfe
932 struct cifs_pending_open {
933 struct list_head olist;
934 struct tcon_link *tlink;
940 * This info hangs off the cifsFileInfo structure, pointed to by llist.
941 * This is used to track byte stream locks on the file
943 struct cifsLockInfo {
944 struct list_head llist; /* pointer to next cifsLockInfo */
945 struct list_head blist; /* pointer to locks blocked on this */
946 wait_queue_head_t block_q;
954 * One of these for each open instance of a file
956 struct cifs_search_info {
957 loff_t index_of_last_entry;
958 __u16 entries_in_buffer;
961 char *ntwrk_buf_start;
962 char *srch_entries_start;
964 const char *presume_name;
965 unsigned int resume_name_len;
969 bool smallBuf:1; /* so we know which buf_release function to call */
972 struct cifs_open_parms {
973 struct cifs_tcon *tcon;
974 struct cifs_sb_info *cifs_sb;
979 struct cifs_fid *fid;
985 #ifdef CONFIG_CIFS_SMB2
986 __u64 persistent_fid; /* persist file id for smb2 */
987 __u64 volatile_fid; /* volatile file id for smb2 */
988 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
990 struct cifs_pending_open *pending_open;
995 struct cifs_fid_locks {
996 struct list_head llist;
997 struct cifsFileInfo *cfile; /* fid that owns locks */
998 struct list_head locks; /* locks held by fid above */
1001 struct cifsFileInfo {
1002 struct list_head tlist; /* pointer to next fid owned by tcon */
1003 struct list_head flist; /* next fid (file instance) for this inode */
1004 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1005 kuid_t uid; /* allows finding which FileInfo structure */
1006 __u32 pid; /* process id who opened file */
1007 struct cifs_fid fid; /* file id from remote */
1008 /* BB add lock scope info here if needed */ ;
1009 /* lock scope id (0 if none) */
1010 struct dentry *dentry;
1011 unsigned int f_flags;
1012 struct tcon_link *tlink;
1013 bool invalidHandle:1; /* file closed via session abend */
1014 bool oplock_break_cancelled:1;
1015 int count; /* refcount protected by cifs_file_list_lock */
1016 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1017 struct cifs_search_info srch_inf;
1018 struct work_struct oplock_break; /* work for oplock breaks */
1021 struct cifs_io_parms {
1023 #ifdef CONFIG_CIFS_SMB2
1024 __u64 persistent_fid; /* persist file id for smb2 */
1025 __u64 volatile_fid; /* volatile file id for smb2 */
1029 unsigned int length;
1030 struct cifs_tcon *tcon;
1033 struct cifs_readdata;
1035 /* asynchronous read support */
1036 struct cifs_readdata {
1037 struct kref refcount;
1038 struct list_head list;
1039 struct completion done;
1040 struct cifsFileInfo *cfile;
1041 struct address_space *mapping;
1046 struct work_struct work;
1047 int (*read_into_pages)(struct TCP_Server_Info *server,
1048 struct cifs_readdata *rdata,
1051 unsigned int pagesz;
1052 unsigned int tailsz;
1053 unsigned int nr_pages;
1054 struct page *pages[];
1057 struct cifs_writedata;
1059 /* asynchronous write support */
1060 struct cifs_writedata {
1061 struct kref refcount;
1062 struct list_head list;
1063 struct completion done;
1064 enum writeback_sync_modes sync_mode;
1065 struct work_struct work;
1066 struct cifsFileInfo *cfile;
1071 unsigned int pagesz;
1072 unsigned int tailsz;
1073 unsigned int nr_pages;
1074 struct page *pages[];
1078 * Take a reference on the file private data. Must be called with
1079 * cifs_file_list_lock held.
1082 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1087 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1088 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1090 #define CIFS_CACHE_READ_FLG 1
1091 #define CIFS_CACHE_HANDLE_FLG 2
1092 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1093 #define CIFS_CACHE_WRITE_FLG 4
1094 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1095 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1097 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1098 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1099 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1102 * One of these for each file inode
1105 struct cifsInodeInfo {
1106 bool can_cache_brlcks;
1107 struct list_head llist; /* locks helb by this inode */
1108 struct rw_semaphore lock_sem; /* protect the fields above */
1109 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1110 struct list_head openFileList;
1111 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1112 unsigned int oplock; /* oplock/lease level we have */
1113 unsigned int epoch; /* used to track lease state changes */
1114 bool delete_pending; /* DELETE_ON_CLOSE is set */
1115 bool invalid_mapping; /* pagecache is invalid */
1116 unsigned long time; /* jiffies of last update of inode */
1117 u64 server_eof; /* current file size on server -- protected by i_lock */
1118 u64 uniqueid; /* server inode number */
1119 u64 createtime; /* creation time on server */
1120 #ifdef CONFIG_CIFS_SMB2
1121 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1123 #ifdef CONFIG_CIFS_FSCACHE
1124 struct fscache_cookie *fscache;
1126 struct inode vfs_inode;
1129 static inline struct cifsInodeInfo *
1130 CIFS_I(struct inode *inode)
1132 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1135 static inline struct cifs_sb_info *
1136 CIFS_SB(struct super_block *sb)
1138 return sb->s_fs_info;
1141 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1143 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1150 convert_delimiter(char *path, char delim)
1152 char old_delim, *pos;
1160 while ((pos = strchr(pos, old_delim)))
1164 #ifdef CONFIG_CIFS_STATS
1165 #define cifs_stats_inc atomic_inc
1167 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1171 spin_lock(&tcon->stat_lock);
1172 tcon->bytes_written += bytes;
1173 spin_unlock(&tcon->stat_lock);
1177 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1180 spin_lock(&tcon->stat_lock);
1181 tcon->bytes_read += bytes;
1182 spin_unlock(&tcon->stat_lock);
1186 #define cifs_stats_inc(field) do {} while (0)
1187 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1188 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1194 * This is the prototype for the mid receive function. This function is for
1195 * receiving the rest of the SMB frame, starting with the WordCount (which is
1196 * just after the MID in struct smb_hdr). Note:
1198 * - This will be called by cifsd, with no locks held.
1199 * - The mid will still be on the pending_mid_q.
1200 * - mid->resp_buf will point to the current buffer.
1202 * Returns zero on a successful receive, or an error. The receive state in
1203 * the TCP_Server_Info will also be updated.
1205 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1206 struct mid_q_entry *mid);
1209 * This is the prototype for the mid callback function. This is called once the
1210 * mid has been received off of the socket. When creating one, take special
1211 * care to avoid deadlocks. Things to bear in mind:
1213 * - it will be called by cifsd, with no locks held
1214 * - the mid will be removed from any lists
1216 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1218 /* one of these for every pending CIFS request to the server */
1219 struct mid_q_entry {
1220 struct list_head qhead; /* mids waiting on reply from this server */
1221 struct TCP_Server_Info *server; /* server corresponding to this mid */
1222 __u64 mid; /* multiplex id */
1223 __u32 pid; /* process id */
1224 __u32 sequence_number; /* for CIFS signing */
1225 unsigned long when_alloc; /* when mid was created */
1226 #ifdef CONFIG_CIFS_STATS2
1227 unsigned long when_sent; /* time when smb send finished */
1228 unsigned long when_received; /* when demux complete (taken off wire) */
1230 mid_receive_t *receive; /* call receive callback */
1231 mid_callback_t *callback; /* call completion callback */
1232 void *callback_data; /* general purpose pointer for callback */
1233 void *resp_buf; /* pointer to received SMB header */
1234 int mid_state; /* wish this were enum but can not pass to wait_event */
1235 __le16 command; /* smb command code */
1236 bool large_buf:1; /* if valid response, is pointer to large buf */
1237 bool multiRsp:1; /* multiple trans2 responses for one request */
1238 bool multiEnd:1; /* both received */
1241 /* Make code in transport.c a little cleaner by moving
1242 update of optional stats into function below */
1243 #ifdef CONFIG_CIFS_STATS2
1245 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1247 atomic_inc(&server->in_send);
1250 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1252 atomic_dec(&server->in_send);
1255 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1257 atomic_inc(&server->num_waiters);
1260 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1262 atomic_dec(&server->num_waiters);
1265 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1267 mid->when_sent = jiffies;
1270 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1273 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1277 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1281 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1285 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1290 /* for pending dnotify requests */
1291 struct dir_notify_req {
1292 struct list_head lhead;
1299 __u32 filter; /* CompletionFilter (for multishot) */
1304 struct dfs_info3_param {
1305 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1314 * common struct for holding inode info when searching for or updating an
1315 * inode with new info
1318 #define CIFS_FATTR_DFS_REFERRAL 0x1
1319 #define CIFS_FATTR_DELETE_PENDING 0x2
1320 #define CIFS_FATTR_NEED_REVAL 0x4
1321 #define CIFS_FATTR_INO_COLLISION 0x8
1322 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1335 unsigned int cf_nlink;
1336 unsigned int cf_dtype;
1337 struct timespec cf_atime;
1338 struct timespec cf_mtime;
1339 struct timespec cf_ctime;
1342 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1345 kfree(param->path_name);
1346 kfree(param->node_name);
1351 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1352 int number_of_items)
1355 if ((number_of_items == 0) || (param == NULL))
1357 for (i = 0; i < number_of_items; i++) {
1358 kfree(param[i].path_name);
1359 kfree(param[i].node_name);
1365 #define MID_REQUEST_ALLOCATED 1
1366 #define MID_REQUEST_SUBMITTED 2
1367 #define MID_RESPONSE_RECEIVED 4
1368 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1369 #define MID_RESPONSE_MALFORMED 0x10
1370 #define MID_SHUTDOWN 0x20
1372 /* Types of response buffer returned from SendReceive2 */
1373 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1374 #define CIFS_SMALL_BUFFER 1
1375 #define CIFS_LARGE_BUFFER 2
1376 #define CIFS_IOVEC 4 /* array of response buffers */
1378 /* Type of Request to SendReceive2 */
1379 #define CIFS_BLOCKING_OP 1 /* operation can block */
1380 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1381 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1382 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1383 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1384 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1386 /* Type of request operation */
1387 #define CIFS_ECHO_OP 0x080 /* echo request */
1388 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1389 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1390 #define CIFS_OP_MASK 0x0380 /* mask request type */
1392 /* Security Flags: indicate type of session setup needed */
1393 #define CIFSSEC_MAY_SIGN 0x00001
1394 #define CIFSSEC_MAY_NTLM 0x00002
1395 #define CIFSSEC_MAY_NTLMV2 0x00004
1396 #define CIFSSEC_MAY_KRB5 0x00008
1397 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1398 #define CIFSSEC_MAY_LANMAN 0x00010
1399 #define CIFSSEC_MAY_PLNTXT 0x00020
1401 #define CIFSSEC_MAY_LANMAN 0
1402 #define CIFSSEC_MAY_PLNTXT 0
1403 #endif /* weak passwords */
1404 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1405 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1407 #define CIFSSEC_MUST_SIGN 0x01001
1408 /* note that only one of the following can be set so the
1409 result of setting MUST flags more than once will be to
1410 require use of the stronger protocol */
1411 #define CIFSSEC_MUST_NTLM 0x02002
1412 #define CIFSSEC_MUST_NTLMV2 0x04004
1413 #define CIFSSEC_MUST_KRB5 0x08008
1414 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1415 #define CIFSSEC_MUST_LANMAN 0x10010
1416 #define CIFSSEC_MUST_PLNTXT 0x20020
1417 #ifdef CONFIG_CIFS_UPCALL
1418 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1420 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1422 #else /* do not allow weak pw hash */
1423 #define CIFSSEC_MUST_LANMAN 0
1424 #define CIFSSEC_MUST_PLNTXT 0
1425 #ifdef CONFIG_CIFS_UPCALL
1426 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1428 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1430 #endif /* WEAK_PW_HASH */
1431 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1432 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1434 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1435 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1436 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1438 *****************************************************************
1439 * All constants go here
1440 *****************************************************************
1443 #define UID_HASH (16)
1446 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1447 * following to be declared.
1450 /****************************************************************************
1451 * Locking notes. All updates to global variables and lists should be
1452 * protected by spinlocks or semaphores.
1456 * GlobalMid_Lock protects:
1457 * list operations on pending_mid_q and oplockQ
1458 * updates to XID counters, multiplex id and SMB sequence numbers
1459 * cifs_file_list_lock protects:
1460 * list operations on tcp and SMB session lists and tCon lists
1461 * f_owner.lock protects certain per file struct operations
1462 * mapping->page_lock protects certain per page operations
1466 * sesSem operations on smb session
1467 * tconSem operations on tree connection
1468 * fh_sem file handle reconnection operations
1470 ****************************************************************************/
1472 #ifdef DECLARE_GLOBALS_HERE
1473 #define GLOBAL_EXTERN
1475 #define GLOBAL_EXTERN extern
1479 * the list of TCP_Server_Info structures, ie each of the sockets
1480 * connecting our client to a distinct server (ip address), is
1481 * chained together by cifs_tcp_ses_list. The list of all our SMB
1482 * sessions (and from that the tree connections) can be found
1483 * by iterating over cifs_tcp_ses_list
1485 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1488 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1489 * tcp session, and the list of tcon's per smb session. It also protects
1490 * the reference counters for the server, smb session, and tcon. Finally,
1491 * changes to the tcon->tidStatus should be done while holding this lock.
1493 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1496 * This lock protects the cifs_file->llist and cifs_file->flist
1497 * list operations, and updates to some flags (cifs_file->invalidHandle)
1498 * It will be moved to either use the tcon->stat_lock or equivalent later.
1499 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1500 * the cifs_tcp_ses_lock must be grabbed first and released last.
1502 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1504 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1505 /* Outstanding dir notify requests */
1506 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1507 /* DirNotify response queue */
1508 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1509 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1512 * Global transaction id (XID) information
1514 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1515 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1516 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1517 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1518 /* on midQ entries */
1520 * Global counters, updated atomically
1522 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1523 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1524 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1525 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1526 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1528 /* Various Debug counters */
1529 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1530 #ifdef CONFIG_CIFS_STATS2
1531 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1532 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1534 GLOBAL_EXTERN atomic_t smBufAllocCount;
1535 GLOBAL_EXTERN atomic_t midCount;
1538 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1539 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1540 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1541 with more secure ntlmssp2 challenge/resp */
1542 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1543 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1544 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1545 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1546 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1547 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1549 #ifdef CONFIG_CIFS_ACL
1550 GLOBAL_EXTERN struct rb_root uidtree;
1551 GLOBAL_EXTERN struct rb_root gidtree;
1552 GLOBAL_EXTERN spinlock_t siduidlock;
1553 GLOBAL_EXTERN spinlock_t sidgidlock;
1554 GLOBAL_EXTERN struct rb_root siduidtree;
1555 GLOBAL_EXTERN struct rb_root sidgidtree;
1556 GLOBAL_EXTERN spinlock_t uidsidlock;
1557 GLOBAL_EXTERN spinlock_t gidsidlock;
1558 #endif /* CONFIG_CIFS_ACL */
1560 void cifs_oplock_break(struct work_struct *work);
1562 extern const struct slow_work_ops cifs_oplock_break_ops;
1563 extern struct workqueue_struct *cifsiod_wq;
1565 extern mempool_t *cifs_mid_poolp;
1567 /* Operations for different SMB versions */
1568 #define SMB1_VERSION_STRING "1.0"
1569 extern struct smb_version_operations smb1_operations;
1570 extern struct smb_version_values smb1_values;
1571 #define SMB20_VERSION_STRING "2.0"
1572 extern struct smb_version_operations smb20_operations;
1573 extern struct smb_version_values smb20_values;
1574 #define SMB21_VERSION_STRING "2.1"
1575 extern struct smb_version_operations smb21_operations;
1576 extern struct smb_version_values smb21_values;
1577 #define SMB30_VERSION_STRING "3.0"
1578 extern struct smb_version_operations smb30_operations;
1579 extern struct smb_version_values smb30_values;
1580 #define SMB302_VERSION_STRING "3.02"
1581 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1582 extern struct smb_version_values smb302_values;
1583 #endif /* _CIFS_GLOB_H */