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 /* sync read from the server */
328 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
329 struct cifs_io_parms *, unsigned int *, char **,
331 /* sync write to the server */
332 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
333 struct cifs_io_parms *, unsigned int *, struct kvec *,
335 /* open dir, start readdir */
336 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
337 const char *, struct cifs_sb_info *,
338 struct cifs_fid *, __u16,
339 struct cifs_search_info *);
340 /* continue readdir */
341 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
343 __u16, struct cifs_search_info *srch_inf);
345 int (*close_dir)(const unsigned int, struct cifs_tcon *,
347 /* calculate a size of SMB message */
348 unsigned int (*calc_smb_size)(void *);
349 /* check for STATUS_PENDING and process it in a positive case */
350 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
351 /* send oplock break response */
352 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
353 struct cifsInodeInfo *);
354 /* query remote filesystem */
355 int (*queryfs)(const unsigned int, struct cifs_tcon *,
357 /* send mandatory brlock to the server */
358 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
359 __u64, __u32, int, int, bool);
360 /* unlock range of mandatory locks */
361 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
363 /* push brlocks from the cache to the server */
364 int (*push_mand_locks)(struct cifsFileInfo *);
365 /* get lease key of the inode */
366 void (*get_lease_key)(struct inode *, struct cifs_fid *);
367 /* set lease key of the inode */
368 void (*set_lease_key)(struct inode *, struct cifs_fid *);
369 /* generate new lease key */
370 void (*new_lease_key)(struct cifs_fid *);
371 int (*generate_signingkey)(struct cifs_ses *);
372 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
373 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
374 struct cifs_sb_info *, const unsigned char *,
375 char *, unsigned int *);
376 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
377 struct cifs_sb_info *, const unsigned char *,
378 char *, unsigned int *);
379 /* if we can do cache read operations */
380 bool (*is_read_op)(__u32);
381 /* set oplock level for the inode */
382 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
384 /* create lease context buffer for CREATE request */
385 char * (*create_lease_buf)(u8 *, u8);
386 /* parse lease context buffer and return oplock/epoch info */
387 __u8 (*parse_lease_buf)(void *, unsigned int *);
388 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
389 struct cifsFileInfo *target_file, u64 src_off, u64 len,
391 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
394 struct smb_version_values {
395 char *version_string;
397 __u32 req_capabilities;
398 __u32 large_lock_type;
399 __u32 exclusive_lock_type;
400 __u32 shared_lock_type;
401 __u32 unlock_lock_type;
403 size_t max_header_size;
404 size_t read_rsp_size;
406 unsigned int cap_unix;
407 unsigned int cap_nt_find;
408 unsigned int cap_large_files;
409 __u16 signing_enabled;
410 __u16 signing_required;
411 size_t create_lease_size;
414 #define HEADER_SIZE(server) (server->vals->header_size)
415 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
422 char *iocharset; /* local code page for mapping to and from Unicode */
423 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
424 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
432 enum securityEnum sectype; /* sectype requested via mnt opts */
433 bool sign; /* was signing requested via mnt opts? */
441 bool no_psx_acl:1; /* set if posix acl support should be disabled */
443 bool backupuid_specified; /* mount option backupuid is specified */
444 bool backupgid_specified; /* mount option backupgid is specified */
445 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
446 bool server_ino:1; /* use inode numbers from server ie UniqueId */
448 bool strict_io:1; /* strict cache behavior */
449 bool remap:1; /* set to remap seven reserved chars in filenames */
450 bool posix_paths:1; /* unset to not ask for posix pathnames. */
453 bool nullauth:1; /* attempt to authenticate with null user */
454 bool nocase:1; /* request case insensitive filenames */
455 bool nobrl:1; /* disable sending byte range locks to srv */
456 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
457 bool seal:1; /* request transport encryption on share */
458 bool nodfs:1; /* Do not request DFS, even if available */
459 bool local_lease:1; /* check leases only on local system, not remote */
462 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
463 bool fsc:1; /* enable fscache */
464 bool mfsymlinks:1; /* use Minshall+French Symlinks */
466 bool rwpidforward:1; /* pid forward for read/write operations */
470 bool sockopt_tcp_nodelay:1;
471 unsigned long actimeo; /* attribute cache timeout (jiffies) */
472 struct smb_version_operations *ops;
473 struct smb_version_values *vals;
475 struct sockaddr_storage dstaddr; /* destination address */
476 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
477 struct nls_table *local_nls;
480 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
481 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
482 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
483 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
484 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
485 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
486 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
487 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
488 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
489 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
491 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
492 MS_NODEV | MS_SYNCHRONOUS)
494 struct cifs_mnt_data {
495 struct cifs_sb_info *cifs_sb;
500 static inline unsigned int
501 get_rfc1002_length(void *buf)
503 return be32_to_cpu(*((__be32 *)buf));
507 inc_rfc1001_len(void *buf, int count)
509 be32_add_cpu((__be32 *)buf, count);
512 struct TCP_Server_Info {
513 struct list_head tcp_ses_list;
514 struct list_head smb_ses_list;
515 int srv_count; /* reference counter */
516 /* 15 character server name + 0x20 16th byte indicating type = srv */
517 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
518 struct smb_version_operations *ops;
519 struct smb_version_values *vals;
520 enum statusEnum tcpStatus; /* what we think the status is */
521 char *hostname; /* hostname portion of UNC string */
522 struct socket *ssocket;
523 struct sockaddr_storage dstaddr;
524 struct sockaddr_storage srcaddr; /* locally bind to this IP */
528 wait_queue_head_t response_q;
529 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
530 struct list_head pending_mid_q;
531 bool noblocksnd; /* use blocking sendmsg */
532 bool noautotune; /* do not autotune send buf sizes */
534 int credits; /* send no more requests at once */
535 unsigned int in_flight; /* number of requests on the wire to server */
536 spinlock_t req_lock; /* protect the two values above */
537 struct mutex srv_mutex;
538 struct task_struct *tsk;
539 char server_GUID[16];
541 bool sign; /* is signing enabled on this connection? */
542 bool session_estab; /* mark when very first sess is established */
543 #ifdef CONFIG_CIFS_SMB2
544 int echo_credits; /* echo reserved slots */
545 int oplock_credits; /* oplock break reserved slots */
546 bool echoes:1; /* enable echoes */
548 u16 dialect; /* dialect index that server chose */
549 bool oplocks:1; /* enable oplocks */
550 unsigned int maxReq; /* Clients should submit no more */
551 /* than maxReq distinct unanswered SMBs to the server when using */
552 /* multiplexed reads or writes */
553 unsigned int maxBuf; /* maxBuf specifies the maximum */
554 /* message size the server can send or receive for non-raw SMBs */
555 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
556 /* when socket is setup (and during reconnect) before NegProt sent */
557 unsigned int max_rw; /* maxRw specifies the maximum */
558 /* message size the server can send or receive for */
559 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
560 unsigned int capabilities; /* selective disabling of caps by smb sess */
561 int timeAdj; /* Adjust for difference in server time zone in sec */
562 __u64 CurrentMid; /* multiplex id - rotating counter */
563 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
564 /* 16th byte of RFC1001 workstation name is always null */
565 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
566 __u32 sequence_number; /* for signing, protected by srv_mutex */
567 struct session_key session_key;
568 unsigned long lstrp; /* when we got last response from this server */
569 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
570 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
571 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
572 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
573 char negflavor; /* NEGOTIATE response flavor */
574 /* extended security flavors that server supports */
575 bool sec_ntlmssp; /* supports NTLMSSP */
576 bool sec_kerberosu2u; /* supports U2U Kerberos */
577 bool sec_kerberos; /* supports plain Kerberos */
578 bool sec_mskerberos; /* supports legacy MS Kerberos */
579 bool large_buf; /* is current buffer large? */
580 struct delayed_work echo; /* echo ping workqueue job */
581 struct kvec *iov; /* reusable kvec array for receives */
582 unsigned int nr_iov; /* number of kvecs in array */
583 char *smallbuf; /* pointer to current "small" buffer */
584 char *bigbuf; /* pointer to current "big" buffer */
585 unsigned int total_read; /* total amount of data read in this pass */
586 #ifdef CONFIG_CIFS_FSCACHE
587 struct fscache_cookie *fscache; /* client index cache cookie */
589 #ifdef CONFIG_CIFS_STATS2
590 atomic_t in_send; /* requests trying to send */
591 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
593 #ifdef CONFIG_CIFS_SMB2
594 unsigned int max_read;
595 unsigned int max_write;
596 #endif /* CONFIG_CIFS_SMB2 */
599 static inline unsigned int
600 in_flight(struct TCP_Server_Info *server)
603 spin_lock(&server->req_lock);
604 num = server->in_flight;
605 spin_unlock(&server->req_lock);
610 has_credits(struct TCP_Server_Info *server, int *credits)
613 spin_lock(&server->req_lock);
615 spin_unlock(&server->req_lock);
620 add_credits(struct TCP_Server_Info *server, const unsigned int add,
623 server->ops->add_credits(server, add, optype);
627 set_credits(struct TCP_Server_Info *server, const int val)
629 server->ops->set_credits(server, val);
633 get_next_mid64(struct TCP_Server_Info *server)
635 return server->ops->get_next_mid(server);
639 get_next_mid(struct TCP_Server_Info *server)
641 __u16 mid = get_next_mid64(server);
643 * The value in the SMB header should be little endian for easy
644 * on-the-wire decoding.
646 return cpu_to_le16(mid);
650 get_mid(const struct smb_hdr *smb)
652 return le16_to_cpu(smb->Mid);
656 compare_mid(__u16 mid, const struct smb_hdr *smb)
658 return mid == le16_to_cpu(smb->Mid);
662 * When the server supports very large reads and writes via POSIX extensions,
663 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
664 * including the RFC1001 length.
666 * Note that this might make for "interesting" allocation problems during
667 * writeback however as we have to allocate an array of pointers for the
668 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
670 * For reads, there is a similar problem as we need to allocate an array
671 * of kvecs to handle the receive, though that should only need to be done
674 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
675 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
678 * When the server doesn't allow large posix writes, only allow a rsize/wsize
679 * of 2^17-1 minus the size of the call header. That allows for a read or
680 * write up to the maximum size described by RFC1002.
682 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
683 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
686 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
687 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
688 * a single wsize request with a single call.
690 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
693 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
694 * those values when posix extensions aren't in force. In actuality here, we
695 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
696 * to be ok with the extra byte even though Windows doesn't send writes that
701 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
703 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
704 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
707 * Macros to allow the TCP_Server_Info->net field and related code to drop out
708 * when CONFIG_NET_NS isn't set.
713 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
718 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
725 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
730 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
737 * Session structure. One of these for each uid session with a particular host
740 struct list_head smb_ses_list;
741 struct list_head tcon_list;
742 struct mutex session_mutex;
743 struct TCP_Server_Info *server; /* pointer to server info */
744 int ses_count; /* reference counter */
745 enum statusEnum status;
746 unsigned overrideSecFlg; /* if non-zero override global sec flags */
747 __u16 ipc_tid; /* special tid for connection to IPC share */
748 char *serverOS; /* name of operating system underlying server */
749 char *serverNOS; /* name of network operating system of server */
750 char *serverDomain; /* security realm of server */
751 __u64 Suid; /* remote smb uid */
752 kuid_t linux_uid; /* overriding owner of files on the mount */
753 kuid_t cred_uid; /* owner of credentials */
754 unsigned int capabilities;
755 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
756 TCP names - will ipv6 and sctp addresses fit? */
757 char *user_name; /* must not be null except during init of sess
758 and after mount option parsing we fill it */
761 struct session_key auth_key;
762 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
763 enum securityEnum sectype; /* what security flavor was specified? */
764 bool sign; /* is signing required? */
765 bool need_reconnect:1; /* connection reset, uid now invalid */
766 #ifdef CONFIG_CIFS_SMB2
768 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
769 #endif /* CONFIG_CIFS_SMB2 */
773 cap_unix(struct cifs_ses *ses)
775 return ses->server->vals->cap_unix & ses->capabilities;
779 * there is one of these for each connection to a resource on a particular
783 struct list_head tcon_list;
785 struct list_head openFileList;
786 struct cifs_ses *ses; /* pointer to session associated with */
787 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
788 char *nativeFileSystem;
789 char *password; /* for share-level security */
790 __u32 tid; /* The 4 byte tree id */
791 __u16 Flags; /* optional support bits */
792 enum statusEnum tidStatus;
793 #ifdef CONFIG_CIFS_STATS
794 atomic_t num_smbs_sent;
799 atomic_t num_flushes;
800 atomic_t num_oplock_brks;
803 atomic_t num_deletes;
805 atomic_t num_posixopens;
806 atomic_t num_posixmkdirs;
808 atomic_t num_renames;
809 atomic_t num_t2renames;
813 atomic_t num_hardlinks;
814 atomic_t num_symlinks;
816 atomic_t num_acl_get;
817 atomic_t num_acl_set;
819 #ifdef CONFIG_CIFS_SMB2
821 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
822 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
824 #endif /* CONFIG_CIFS_SMB2 */
826 #ifdef CONFIG_CIFS_STATS2
827 unsigned long long time_writes;
828 unsigned long long time_reads;
829 unsigned long long time_opens;
830 unsigned long long time_deletes;
831 unsigned long long time_closes;
832 unsigned long long time_mkdirs;
833 unsigned long long time_rmdirs;
834 unsigned long long time_renames;
835 unsigned long long time_t2renames;
836 unsigned long long time_ffirst;
837 unsigned long long time_fnext;
838 unsigned long long time_fclose;
839 #endif /* CONFIG_CIFS_STATS2 */
842 spinlock_t stat_lock;
843 #endif /* CONFIG_CIFS_STATS */
844 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
845 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
846 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
847 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
850 bool seal:1; /* transport encryption for this mounted share */
851 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
852 for this mount even if server would support */
853 bool local_lease:1; /* check leases (only) on local system not remote */
854 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
855 bool need_reconnect:1; /* connection reset, tid now invalid */
856 #ifdef CONFIG_CIFS_SMB2
857 bool print:1; /* set if connection to printer share */
858 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
861 __u32 maximal_access;
862 __u32 vol_serial_number;
863 __le64 vol_create_time;
864 __u32 ss_flags; /* sector size flags */
865 __u32 perf_sector_size; /* best sector size for perf */
867 __u32 max_bytes_chunk;
868 __u32 max_bytes_copy;
869 #endif /* CONFIG_CIFS_SMB2 */
870 #ifdef CONFIG_CIFS_FSCACHE
871 u64 resource_id; /* server resource id */
872 struct fscache_cookie *fscache; /* cookie for share */
874 struct list_head pending_opens; /* list of incomplete opens */
875 /* BB add field for back pointer to sb struct(s)? */
879 * This is a refcounted and timestamped container for a tcon pointer. The
880 * container holds a tcon reference. It is considered safe to free one of
881 * these when the tl_count goes to 0. The tl_time is the time of the last
882 * "get" on the container.
885 struct rb_node tl_rbnode;
887 unsigned long tl_flags;
888 #define TCON_LINK_MASTER 0
889 #define TCON_LINK_PENDING 1
890 #define TCON_LINK_IN_TREE 2
891 unsigned long tl_time;
893 struct cifs_tcon *tl_tcon;
896 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
898 static inline struct cifs_tcon *
899 tlink_tcon(struct tcon_link *tlink)
901 return tlink->tl_tcon;
904 extern void cifs_put_tlink(struct tcon_link *tlink);
906 static inline struct tcon_link *
907 cifs_get_tlink(struct tcon_link *tlink)
909 if (tlink && !IS_ERR(tlink))
910 atomic_inc(&tlink->tl_count);
914 /* This function is always expected to succeed */
915 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
917 #define CIFS_OPLOCK_NO_CHANGE 0xfe
919 struct cifs_pending_open {
920 struct list_head olist;
921 struct tcon_link *tlink;
927 * This info hangs off the cifsFileInfo structure, pointed to by llist.
928 * This is used to track byte stream locks on the file
930 struct cifsLockInfo {
931 struct list_head llist; /* pointer to next cifsLockInfo */
932 struct list_head blist; /* pointer to locks blocked on this */
933 wait_queue_head_t block_q;
941 * One of these for each open instance of a file
943 struct cifs_search_info {
944 loff_t index_of_last_entry;
945 __u16 entries_in_buffer;
948 char *ntwrk_buf_start;
949 char *srch_entries_start;
951 const char *presume_name;
952 unsigned int resume_name_len;
956 bool smallBuf:1; /* so we know which buf_release function to call */
959 struct cifs_open_parms {
960 struct cifs_tcon *tcon;
961 struct cifs_sb_info *cifs_sb;
966 struct cifs_fid *fid;
972 #ifdef CONFIG_CIFS_SMB2
973 __u64 persistent_fid; /* persist file id for smb2 */
974 __u64 volatile_fid; /* volatile file id for smb2 */
975 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
977 struct cifs_pending_open *pending_open;
982 struct cifs_fid_locks {
983 struct list_head llist;
984 struct cifsFileInfo *cfile; /* fid that owns locks */
985 struct list_head locks; /* locks held by fid above */
988 struct cifsFileInfo {
989 struct list_head tlist; /* pointer to next fid owned by tcon */
990 struct list_head flist; /* next fid (file instance) for this inode */
991 struct cifs_fid_locks *llist; /* brlocks held by this fid */
992 kuid_t uid; /* allows finding which FileInfo structure */
993 __u32 pid; /* process id who opened file */
994 struct cifs_fid fid; /* file id from remote */
995 /* BB add lock scope info here if needed */ ;
996 /* lock scope id (0 if none) */
997 struct dentry *dentry;
998 unsigned int f_flags;
999 struct tcon_link *tlink;
1000 bool invalidHandle:1; /* file closed via session abend */
1001 bool oplock_break_cancelled:1;
1002 int count; /* refcount protected by cifs_file_list_lock */
1003 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1004 struct cifs_search_info srch_inf;
1005 struct work_struct oplock_break; /* work for oplock breaks */
1008 struct cifs_io_parms {
1010 #ifdef CONFIG_CIFS_SMB2
1011 __u64 persistent_fid; /* persist file id for smb2 */
1012 __u64 volatile_fid; /* volatile file id for smb2 */
1016 unsigned int length;
1017 struct cifs_tcon *tcon;
1020 struct cifs_readdata;
1022 /* asynchronous read support */
1023 struct cifs_readdata {
1024 struct kref refcount;
1025 struct list_head list;
1026 struct completion done;
1027 struct cifsFileInfo *cfile;
1028 struct address_space *mapping;
1033 struct work_struct work;
1034 int (*read_into_pages)(struct TCP_Server_Info *server,
1035 struct cifs_readdata *rdata,
1038 unsigned int pagesz;
1039 unsigned int tailsz;
1040 unsigned int nr_pages;
1041 struct page *pages[];
1044 struct cifs_writedata;
1046 /* asynchronous write support */
1047 struct cifs_writedata {
1048 struct kref refcount;
1049 struct list_head list;
1050 struct completion done;
1051 enum writeback_sync_modes sync_mode;
1052 struct work_struct work;
1053 struct cifsFileInfo *cfile;
1058 unsigned int pagesz;
1059 unsigned int tailsz;
1060 unsigned int nr_pages;
1061 struct page *pages[1];
1065 * Take a reference on the file private data. Must be called with
1066 * cifs_file_list_lock held.
1069 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1074 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1075 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1077 #define CIFS_CACHE_READ_FLG 1
1078 #define CIFS_CACHE_HANDLE_FLG 2
1079 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1080 #define CIFS_CACHE_WRITE_FLG 4
1081 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1082 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1084 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1085 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1086 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1089 * One of these for each file inode
1092 struct cifsInodeInfo {
1093 bool can_cache_brlcks;
1094 struct list_head llist; /* locks helb by this inode */
1095 struct rw_semaphore lock_sem; /* protect the fields above */
1096 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1097 struct list_head openFileList;
1098 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1099 unsigned int oplock; /* oplock/lease level we have */
1100 unsigned int epoch; /* used to track lease state changes */
1101 bool delete_pending; /* DELETE_ON_CLOSE is set */
1102 bool invalid_mapping; /* pagecache is invalid */
1103 unsigned long time; /* jiffies of last update of inode */
1104 u64 server_eof; /* current file size on server -- protected by i_lock */
1105 u64 uniqueid; /* server inode number */
1106 u64 createtime; /* creation time on server */
1107 #ifdef CONFIG_CIFS_SMB2
1108 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1110 #ifdef CONFIG_CIFS_FSCACHE
1111 struct fscache_cookie *fscache;
1113 struct inode vfs_inode;
1116 static inline struct cifsInodeInfo *
1117 CIFS_I(struct inode *inode)
1119 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1122 static inline struct cifs_sb_info *
1123 CIFS_SB(struct super_block *sb)
1125 return sb->s_fs_info;
1128 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1130 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1137 convert_delimiter(char *path, char delim)
1139 char old_delim, *pos;
1147 while ((pos = strchr(pos, old_delim)))
1151 #ifdef CONFIG_CIFS_STATS
1152 #define cifs_stats_inc atomic_inc
1154 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1158 spin_lock(&tcon->stat_lock);
1159 tcon->bytes_written += bytes;
1160 spin_unlock(&tcon->stat_lock);
1164 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1167 spin_lock(&tcon->stat_lock);
1168 tcon->bytes_read += bytes;
1169 spin_unlock(&tcon->stat_lock);
1173 #define cifs_stats_inc(field) do {} while (0)
1174 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1175 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1181 * This is the prototype for the mid receive function. This function is for
1182 * receiving the rest of the SMB frame, starting with the WordCount (which is
1183 * just after the MID in struct smb_hdr). Note:
1185 * - This will be called by cifsd, with no locks held.
1186 * - The mid will still be on the pending_mid_q.
1187 * - mid->resp_buf will point to the current buffer.
1189 * Returns zero on a successful receive, or an error. The receive state in
1190 * the TCP_Server_Info will also be updated.
1192 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1193 struct mid_q_entry *mid);
1196 * This is the prototype for the mid callback function. This is called once the
1197 * mid has been received off of the socket. When creating one, take special
1198 * care to avoid deadlocks. Things to bear in mind:
1200 * - it will be called by cifsd, with no locks held
1201 * - the mid will be removed from any lists
1203 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1205 /* one of these for every pending CIFS request to the server */
1206 struct mid_q_entry {
1207 struct list_head qhead; /* mids waiting on reply from this server */
1208 struct TCP_Server_Info *server; /* server corresponding to this mid */
1209 __u64 mid; /* multiplex id */
1210 __u32 pid; /* process id */
1211 __u32 sequence_number; /* for CIFS signing */
1212 unsigned long when_alloc; /* when mid was created */
1213 #ifdef CONFIG_CIFS_STATS2
1214 unsigned long when_sent; /* time when smb send finished */
1215 unsigned long when_received; /* when demux complete (taken off wire) */
1217 mid_receive_t *receive; /* call receive callback */
1218 mid_callback_t *callback; /* call completion callback */
1219 void *callback_data; /* general purpose pointer for callback */
1220 void *resp_buf; /* pointer to received SMB header */
1221 int mid_state; /* wish this were enum but can not pass to wait_event */
1222 __le16 command; /* smb command code */
1223 bool large_buf:1; /* if valid response, is pointer to large buf */
1224 bool multiRsp:1; /* multiple trans2 responses for one request */
1225 bool multiEnd:1; /* both received */
1228 /* Make code in transport.c a little cleaner by moving
1229 update of optional stats into function below */
1230 #ifdef CONFIG_CIFS_STATS2
1232 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1234 atomic_inc(&server->in_send);
1237 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1239 atomic_dec(&server->in_send);
1242 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1244 atomic_inc(&server->num_waiters);
1247 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1249 atomic_dec(&server->num_waiters);
1252 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1254 mid->when_sent = jiffies;
1257 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1260 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1264 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1268 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1272 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1277 /* for pending dnotify requests */
1278 struct dir_notify_req {
1279 struct list_head lhead;
1286 __u32 filter; /* CompletionFilter (for multishot) */
1291 struct dfs_info3_param {
1292 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1301 * common struct for holding inode info when searching for or updating an
1302 * inode with new info
1305 #define CIFS_FATTR_DFS_REFERRAL 0x1
1306 #define CIFS_FATTR_DELETE_PENDING 0x2
1307 #define CIFS_FATTR_NEED_REVAL 0x4
1308 #define CIFS_FATTR_INO_COLLISION 0x8
1309 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1322 unsigned int cf_nlink;
1323 unsigned int cf_dtype;
1324 struct timespec cf_atime;
1325 struct timespec cf_mtime;
1326 struct timespec cf_ctime;
1329 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1332 kfree(param->path_name);
1333 kfree(param->node_name);
1338 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1339 int number_of_items)
1342 if ((number_of_items == 0) || (param == NULL))
1344 for (i = 0; i < number_of_items; i++) {
1345 kfree(param[i].path_name);
1346 kfree(param[i].node_name);
1352 #define MID_REQUEST_ALLOCATED 1
1353 #define MID_REQUEST_SUBMITTED 2
1354 #define MID_RESPONSE_RECEIVED 4
1355 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1356 #define MID_RESPONSE_MALFORMED 0x10
1357 #define MID_SHUTDOWN 0x20
1359 /* Types of response buffer returned from SendReceive2 */
1360 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1361 #define CIFS_SMALL_BUFFER 1
1362 #define CIFS_LARGE_BUFFER 2
1363 #define CIFS_IOVEC 4 /* array of response buffers */
1365 /* Type of Request to SendReceive2 */
1366 #define CIFS_BLOCKING_OP 1 /* operation can block */
1367 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1368 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1369 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1370 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1371 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1373 /* Type of request operation */
1374 #define CIFS_ECHO_OP 0x080 /* echo request */
1375 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1376 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1377 #define CIFS_OP_MASK 0x0380 /* mask request type */
1379 /* Security Flags: indicate type of session setup needed */
1380 #define CIFSSEC_MAY_SIGN 0x00001
1381 #define CIFSSEC_MAY_NTLM 0x00002
1382 #define CIFSSEC_MAY_NTLMV2 0x00004
1383 #define CIFSSEC_MAY_KRB5 0x00008
1384 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1385 #define CIFSSEC_MAY_LANMAN 0x00010
1386 #define CIFSSEC_MAY_PLNTXT 0x00020
1388 #define CIFSSEC_MAY_LANMAN 0
1389 #define CIFSSEC_MAY_PLNTXT 0
1390 #endif /* weak passwords */
1391 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1392 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1394 #define CIFSSEC_MUST_SIGN 0x01001
1395 /* note that only one of the following can be set so the
1396 result of setting MUST flags more than once will be to
1397 require use of the stronger protocol */
1398 #define CIFSSEC_MUST_NTLM 0x02002
1399 #define CIFSSEC_MUST_NTLMV2 0x04004
1400 #define CIFSSEC_MUST_KRB5 0x08008
1401 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1402 #define CIFSSEC_MUST_LANMAN 0x10010
1403 #define CIFSSEC_MUST_PLNTXT 0x20020
1404 #ifdef CONFIG_CIFS_UPCALL
1405 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1407 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1409 #else /* do not allow weak pw hash */
1410 #define CIFSSEC_MUST_LANMAN 0
1411 #define CIFSSEC_MUST_PLNTXT 0
1412 #ifdef CONFIG_CIFS_UPCALL
1413 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1415 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1417 #endif /* WEAK_PW_HASH */
1418 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1419 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1421 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1422 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1423 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1425 *****************************************************************
1426 * All constants go here
1427 *****************************************************************
1430 #define UID_HASH (16)
1433 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1434 * following to be declared.
1437 /****************************************************************************
1438 * Locking notes. All updates to global variables and lists should be
1439 * protected by spinlocks or semaphores.
1443 * GlobalMid_Lock protects:
1444 * list operations on pending_mid_q and oplockQ
1445 * updates to XID counters, multiplex id and SMB sequence numbers
1446 * cifs_file_list_lock protects:
1447 * list operations on tcp and SMB session lists and tCon lists
1448 * f_owner.lock protects certain per file struct operations
1449 * mapping->page_lock protects certain per page operations
1453 * sesSem operations on smb session
1454 * tconSem operations on tree connection
1455 * fh_sem file handle reconnection operations
1457 ****************************************************************************/
1459 #ifdef DECLARE_GLOBALS_HERE
1460 #define GLOBAL_EXTERN
1462 #define GLOBAL_EXTERN extern
1466 * the list of TCP_Server_Info structures, ie each of the sockets
1467 * connecting our client to a distinct server (ip address), is
1468 * chained together by cifs_tcp_ses_list. The list of all our SMB
1469 * sessions (and from that the tree connections) can be found
1470 * by iterating over cifs_tcp_ses_list
1472 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1475 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1476 * tcp session, and the list of tcon's per smb session. It also protects
1477 * the reference counters for the server, smb session, and tcon. Finally,
1478 * changes to the tcon->tidStatus should be done while holding this lock.
1480 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1483 * This lock protects the cifs_file->llist and cifs_file->flist
1484 * list operations, and updates to some flags (cifs_file->invalidHandle)
1485 * It will be moved to either use the tcon->stat_lock or equivalent later.
1486 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1487 * the cifs_tcp_ses_lock must be grabbed first and released last.
1489 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1491 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1492 /* Outstanding dir notify requests */
1493 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1494 /* DirNotify response queue */
1495 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1496 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1499 * Global transaction id (XID) information
1501 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1502 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1503 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1504 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1505 /* on midQ entries */
1507 * Global counters, updated atomically
1509 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1510 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1511 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1512 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1513 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1515 /* Various Debug counters */
1516 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1517 #ifdef CONFIG_CIFS_STATS2
1518 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1519 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1521 GLOBAL_EXTERN atomic_t smBufAllocCount;
1522 GLOBAL_EXTERN atomic_t midCount;
1525 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1526 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1527 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1528 with more secure ntlmssp2 challenge/resp */
1529 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1530 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1531 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1532 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1533 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1534 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1536 #ifdef CONFIG_CIFS_ACL
1537 GLOBAL_EXTERN struct rb_root uidtree;
1538 GLOBAL_EXTERN struct rb_root gidtree;
1539 GLOBAL_EXTERN spinlock_t siduidlock;
1540 GLOBAL_EXTERN spinlock_t sidgidlock;
1541 GLOBAL_EXTERN struct rb_root siduidtree;
1542 GLOBAL_EXTERN struct rb_root sidgidtree;
1543 GLOBAL_EXTERN spinlock_t uidsidlock;
1544 GLOBAL_EXTERN spinlock_t gidsidlock;
1545 #endif /* CONFIG_CIFS_ACL */
1547 void cifs_oplock_break(struct work_struct *work);
1549 extern const struct slow_work_ops cifs_oplock_break_ops;
1550 extern struct workqueue_struct *cifsiod_wq;
1552 extern mempool_t *cifs_mid_poolp;
1554 /* Operations for different SMB versions */
1555 #define SMB1_VERSION_STRING "1.0"
1556 extern struct smb_version_operations smb1_operations;
1557 extern struct smb_version_values smb1_values;
1558 #define SMB20_VERSION_STRING "2.0"
1559 extern struct smb_version_operations smb20_operations;
1560 extern struct smb_version_values smb20_values;
1561 #define SMB21_VERSION_STRING "2.1"
1562 extern struct smb_version_operations smb21_operations;
1563 extern struct smb_version_values smb21_values;
1564 #define SMB30_VERSION_STRING "3.0"
1565 extern struct smb_version_operations smb30_operations;
1566 extern struct smb_version_values smb30_values;
1567 #define SMB302_VERSION_STRING "3.02"
1568 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1569 extern struct smb_version_values smb302_values;
1570 #endif /* _CIFS_GLOB_H */