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 /* SMB echo "timeout" -- FIXME: tunable? */
74 #define SMB_ECHO_INTERVAL (60 * HZ)
78 #ifndef XATTR_DOS_ATTRIB
79 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
83 * CIFS vfs client Status information (based on what we know.)
86 /* associated with each tcp and smb session */
96 Unspecified = 0, /* not specified */
97 LANMAN, /* Legacy LANMAN auth */
98 NTLM, /* Legacy NTLM012 auth with NTLM hash */
99 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
100 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
101 Kerberos, /* Kerberos via SPNEGO */
109 /* crypto security descriptor definition */
111 struct shash_desc shash;
115 /* crypto hashing related structure/fields, not specific to a sec mech */
116 struct cifs_secmech {
117 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
118 struct crypto_shash *md5; /* md5 hash function */
119 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
120 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
121 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
122 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
123 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
124 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
127 /* per smb session structure/fields */
128 struct ntlmssp_auth {
129 bool sesskey_per_smbsess; /* whether session key is per smb session */
130 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
131 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
132 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
133 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
141 struct cifs_sid osid;
142 struct cifs_sid gsid;
143 struct cifs_ntace *ntaces;
144 struct cifs_ace *aces;
148 *****************************************************************
149 * Except the CIFS PDUs themselves all the
150 * globally interesting structs should go here
151 *****************************************************************
155 * A smb_rqst represents a complete request to be issued to a server. It's
156 * formed by a kvec array, followed by an array of pages. Page data is assumed
157 * to start at the beginning of the first page.
160 struct kvec *rq_iov; /* array of kvecs */
161 unsigned int rq_nvec; /* number of kvecs in array */
162 struct page **rq_pages; /* pointer to array of page ptrs */
163 unsigned int rq_npages; /* number pages in array */
164 unsigned int rq_pagesz; /* page size to use */
165 unsigned int rq_tailsz; /* length of last page */
177 struct TCP_Server_Info;
181 struct dfs_info3_param;
185 struct cifs_readdata;
186 struct cifs_writedata;
187 struct cifs_io_parms;
188 struct cifs_search_info;
189 struct cifsInodeInfo;
190 struct cifs_open_parms;
192 struct smb_version_operations {
193 int (*send_cancel)(struct TCP_Server_Info *, void *,
194 struct mid_q_entry *);
195 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
196 /* setup request: allocate mid, sign message */
197 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
199 /* setup async request: allocate mid, sign message */
200 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
202 /* check response: verify signature, map error */
203 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
205 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
207 void (*set_credits)(struct TCP_Server_Info *, const int);
208 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
209 unsigned int (*get_credits)(struct mid_q_entry *);
210 __u64 (*get_next_mid)(struct TCP_Server_Info *);
211 /* data offset from read response message */
212 unsigned int (*read_data_offset)(char *);
213 /* data length from read response message */
214 unsigned int (*read_data_length)(char *);
215 /* map smb to linux error */
216 int (*map_error)(char *, bool);
217 /* find mid corresponding to the response message */
218 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
219 void (*dump_detail)(void *);
220 void (*clear_stats)(struct cifs_tcon *);
221 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
222 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
223 /* verify the message */
224 int (*check_message)(char *, unsigned int);
225 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
226 void (*downgrade_oplock)(struct TCP_Server_Info *,
227 struct cifsInodeInfo *, bool);
228 /* process transaction2 response */
229 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
231 /* check if we need to negotiate */
232 bool (*need_neg)(struct TCP_Server_Info *);
233 /* negotiate to the server */
234 int (*negotiate)(const unsigned int, struct cifs_ses *);
235 /* set negotiated write size */
236 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
237 /* set negotiated read size */
238 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
239 /* setup smb sessionn */
240 int (*sess_setup)(const unsigned int, struct cifs_ses *,
241 const struct nls_table *);
242 /* close smb session */
243 int (*logoff)(const unsigned int, struct cifs_ses *);
244 /* connect to a server share */
245 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
246 struct cifs_tcon *, const struct nls_table *);
247 /* close tree connecion */
248 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
249 /* get DFS referrals */
250 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
251 const char *, struct dfs_info3_param **,
252 unsigned int *, const struct nls_table *, int);
253 /* informational QFS call */
254 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
255 /* check if a path is accessible or not */
256 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
257 struct cifs_sb_info *, const char *);
258 /* query path data from the server */
259 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
260 struct cifs_sb_info *, const char *,
261 FILE_ALL_INFO *, bool *, bool *);
262 /* query file data from the server */
263 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
264 struct cifs_fid *, FILE_ALL_INFO *);
265 /* get server index number */
266 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
267 struct cifs_sb_info *, const char *,
268 u64 *uniqueid, FILE_ALL_INFO *);
269 /* set size by path */
270 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
271 const char *, __u64, struct cifs_sb_info *, bool);
272 /* set size by file handle */
273 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
274 struct cifsFileInfo *, __u64, bool);
276 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
278 int (*set_compression)(const unsigned int, struct cifs_tcon *,
279 struct cifsFileInfo *);
280 /* check if we can send an echo or nor */
281 bool (*can_echo)(struct TCP_Server_Info *);
282 /* send echo request */
283 int (*echo)(struct TCP_Server_Info *);
284 /* create directory */
285 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
286 struct cifs_sb_info *);
287 /* set info on created directory */
288 void (*mkdir_setinfo)(struct inode *, const char *,
289 struct cifs_sb_info *, struct cifs_tcon *,
291 /* remove directory */
292 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
293 struct cifs_sb_info *);
295 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
297 /* open, rename and delete file */
298 int (*rename_pending_delete)(const char *, struct dentry *,
300 /* send rename request */
301 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
302 const char *, struct cifs_sb_info *);
303 /* send create hardlink request */
304 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
305 const char *, const char *,
306 struct cifs_sb_info *);
307 /* query symlink target */
308 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
309 const char *, char **, struct cifs_sb_info *);
310 /* open a file for non-posix mounts */
311 int (*open)(const unsigned int, struct cifs_open_parms *,
312 __u32 *, FILE_ALL_INFO *);
313 /* set fid protocol-specific info */
314 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
316 void (*close)(const unsigned int, struct cifs_tcon *,
318 /* send a flush request to the server */
319 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
320 /* async read from the server */
321 int (*async_readv)(struct cifs_readdata *);
322 /* async write to the server */
323 int (*async_writev)(struct cifs_writedata *,
324 void (*release)(struct kref *));
325 /* sync read from the server */
326 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
327 struct cifs_io_parms *, unsigned int *, char **,
329 /* sync write to the server */
330 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
331 struct cifs_io_parms *, unsigned int *, struct kvec *,
333 /* open dir, start readdir */
334 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
335 const char *, struct cifs_sb_info *,
336 struct cifs_fid *, __u16,
337 struct cifs_search_info *);
338 /* continue readdir */
339 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
341 __u16, struct cifs_search_info *srch_inf);
343 int (*close_dir)(const unsigned int, struct cifs_tcon *,
345 /* calculate a size of SMB message */
346 unsigned int (*calc_smb_size)(void *);
347 /* check for STATUS_PENDING and process it in a positive case */
348 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
349 /* send oplock break response */
350 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
351 struct cifsInodeInfo *);
352 /* query remote filesystem */
353 int (*queryfs)(const unsigned int, struct cifs_tcon *,
355 /* send mandatory brlock to the server */
356 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
357 __u64, __u32, int, int, bool);
358 /* unlock range of mandatory locks */
359 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
361 /* push brlocks from the cache to the server */
362 int (*push_mand_locks)(struct cifsFileInfo *);
363 /* get lease key of the inode */
364 void (*get_lease_key)(struct inode *, struct cifs_fid *);
365 /* set lease key of the inode */
366 void (*set_lease_key)(struct inode *, struct cifs_fid *);
367 /* generate new lease key */
368 void (*new_lease_key)(struct cifs_fid *);
369 int (*generate_signingkey)(struct cifs_ses *);
370 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
371 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
372 struct cifs_sb_info *, const unsigned char *,
373 char *, unsigned int *);
374 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
375 struct cifs_sb_info *, const unsigned char *,
376 char *, unsigned int *);
377 /* if we can do cache read operations */
378 bool (*is_read_op)(__u32);
379 /* set oplock level for the inode */
380 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
382 /* create lease context buffer for CREATE request */
383 char * (*create_lease_buf)(u8 *, u8);
384 /* parse lease context buffer and return oplock/epoch info */
385 __u8 (*parse_lease_buf)(void *, unsigned int *);
386 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
387 struct cifsFileInfo *target_file, u64 src_off, u64 len,
389 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
390 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
391 const unsigned char *, const unsigned char *, char *,
392 size_t, const struct nls_table *, int);
393 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
394 const char *, const void *, const __u16,
395 const struct nls_table *, int);
396 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
397 const char *, u32 *);
398 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
399 const struct cifs_fid *, u32 *);
400 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
404 struct smb_version_values {
405 char *version_string;
407 __u32 req_capabilities;
408 __u32 large_lock_type;
409 __u32 exclusive_lock_type;
410 __u32 shared_lock_type;
411 __u32 unlock_lock_type;
413 size_t max_header_size;
414 size_t read_rsp_size;
416 unsigned int cap_unix;
417 unsigned int cap_nt_find;
418 unsigned int cap_large_files;
419 __u16 signing_enabled;
420 __u16 signing_required;
421 size_t create_lease_size;
424 #define HEADER_SIZE(server) (server->vals->header_size)
425 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
432 char *iocharset; /* local code page for mapping to and from Unicode */
433 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
434 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
442 enum securityEnum sectype; /* sectype requested via mnt opts */
443 bool sign; /* was signing requested via mnt opts? */
451 bool no_psx_acl:1; /* set if posix acl support should be disabled */
453 bool backupuid_specified; /* mount option backupuid is specified */
454 bool backupgid_specified; /* mount option backupgid is specified */
455 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
456 bool server_ino:1; /* use inode numbers from server ie UniqueId */
458 bool strict_io:1; /* strict cache behavior */
459 bool remap:1; /* set to remap seven reserved chars in filenames */
460 bool posix_paths:1; /* unset to not ask for posix pathnames. */
463 bool nullauth:1; /* attempt to authenticate with null user */
464 bool nocase:1; /* request case insensitive filenames */
465 bool nobrl:1; /* disable sending byte range locks to srv */
466 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
467 bool seal:1; /* request transport encryption on share */
468 bool nodfs:1; /* Do not request DFS, even if available */
469 bool local_lease:1; /* check leases only on local system, not remote */
472 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
473 bool fsc:1; /* enable fscache */
474 bool mfsymlinks:1; /* use Minshall+French Symlinks */
476 bool rwpidforward:1; /* pid forward for read/write operations */
480 bool sockopt_tcp_nodelay:1;
481 unsigned long actimeo; /* attribute cache timeout (jiffies) */
482 struct smb_version_operations *ops;
483 struct smb_version_values *vals;
485 struct sockaddr_storage dstaddr; /* destination address */
486 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
487 struct nls_table *local_nls;
490 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
491 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
492 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
493 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
494 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
495 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
496 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
497 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
498 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
499 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
501 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
502 MS_NODEV | MS_SYNCHRONOUS)
504 struct cifs_mnt_data {
505 struct cifs_sb_info *cifs_sb;
510 static inline unsigned int
511 get_rfc1002_length(void *buf)
513 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
517 inc_rfc1001_len(void *buf, int count)
519 be32_add_cpu((__be32 *)buf, count);
522 struct TCP_Server_Info {
523 struct list_head tcp_ses_list;
524 struct list_head smb_ses_list;
525 int srv_count; /* reference counter */
526 /* 15 character server name + 0x20 16th byte indicating type = srv */
527 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
528 struct smb_version_operations *ops;
529 struct smb_version_values *vals;
530 enum statusEnum tcpStatus; /* what we think the status is */
531 char *hostname; /* hostname portion of UNC string */
532 struct socket *ssocket;
533 struct sockaddr_storage dstaddr;
534 struct sockaddr_storage srcaddr; /* locally bind to this IP */
538 wait_queue_head_t response_q;
539 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
540 struct list_head pending_mid_q;
541 bool noblocksnd; /* use blocking sendmsg */
542 bool noautotune; /* do not autotune send buf sizes */
544 int credits; /* send no more requests at once */
545 unsigned int in_flight; /* number of requests on the wire to server */
546 spinlock_t req_lock; /* protect the two values above */
547 struct mutex srv_mutex;
548 struct task_struct *tsk;
549 char server_GUID[16];
551 bool sign; /* is signing enabled on this connection? */
552 bool session_estab; /* mark when very first sess is established */
553 #ifdef CONFIG_CIFS_SMB2
554 int echo_credits; /* echo reserved slots */
555 int oplock_credits; /* oplock break reserved slots */
556 bool echoes:1; /* enable echoes */
558 u16 dialect; /* dialect index that server chose */
559 bool oplocks:1; /* enable oplocks */
560 unsigned int maxReq; /* Clients should submit no more */
561 /* than maxReq distinct unanswered SMBs to the server when using */
562 /* multiplexed reads or writes */
563 unsigned int maxBuf; /* maxBuf specifies the maximum */
564 /* message size the server can send or receive for non-raw SMBs */
565 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
566 /* when socket is setup (and during reconnect) before NegProt sent */
567 unsigned int max_rw; /* maxRw specifies the maximum */
568 /* message size the server can send or receive for */
569 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
570 unsigned int capabilities; /* selective disabling of caps by smb sess */
571 int timeAdj; /* Adjust for difference in server time zone in sec */
572 __u64 CurrentMid; /* multiplex id - rotating counter */
573 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
574 /* 16th byte of RFC1001 workstation name is always null */
575 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
576 __u32 sequence_number; /* for signing, protected by srv_mutex */
577 struct session_key session_key;
578 unsigned long lstrp; /* when we got last response from this server */
579 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
580 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
581 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
582 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
583 char negflavor; /* NEGOTIATE response flavor */
584 /* extended security flavors that server supports */
585 bool sec_ntlmssp; /* supports NTLMSSP */
586 bool sec_kerberosu2u; /* supports U2U Kerberos */
587 bool sec_kerberos; /* supports plain Kerberos */
588 bool sec_mskerberos; /* supports legacy MS Kerberos */
589 bool large_buf; /* is current buffer large? */
590 struct delayed_work echo; /* echo ping workqueue job */
591 struct kvec *iov; /* reusable kvec array for receives */
592 unsigned int nr_iov; /* number of kvecs in array */
593 char *smallbuf; /* pointer to current "small" buffer */
594 char *bigbuf; /* pointer to current "big" buffer */
595 unsigned int total_read; /* total amount of data read in this pass */
596 #ifdef CONFIG_CIFS_FSCACHE
597 struct fscache_cookie *fscache; /* client index cache cookie */
599 #ifdef CONFIG_CIFS_STATS2
600 atomic_t in_send; /* requests trying to send */
601 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
603 #ifdef CONFIG_CIFS_SMB2
604 unsigned int max_read;
605 unsigned int max_write;
606 #endif /* CONFIG_CIFS_SMB2 */
609 static inline unsigned int
610 in_flight(struct TCP_Server_Info *server)
613 spin_lock(&server->req_lock);
614 num = server->in_flight;
615 spin_unlock(&server->req_lock);
620 has_credits(struct TCP_Server_Info *server, int *credits)
623 spin_lock(&server->req_lock);
625 spin_unlock(&server->req_lock);
630 add_credits(struct TCP_Server_Info *server, const unsigned int add,
633 server->ops->add_credits(server, add, optype);
637 set_credits(struct TCP_Server_Info *server, const int val)
639 server->ops->set_credits(server, val);
643 get_next_mid64(struct TCP_Server_Info *server)
645 return server->ops->get_next_mid(server);
649 get_next_mid(struct TCP_Server_Info *server)
651 __u16 mid = get_next_mid64(server);
653 * The value in the SMB header should be little endian for easy
654 * on-the-wire decoding.
656 return cpu_to_le16(mid);
660 get_mid(const struct smb_hdr *smb)
662 return le16_to_cpu(smb->Mid);
666 compare_mid(__u16 mid, const struct smb_hdr *smb)
668 return mid == le16_to_cpu(smb->Mid);
672 * When the server supports very large reads and writes via POSIX extensions,
673 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
674 * including the RFC1001 length.
676 * Note that this might make for "interesting" allocation problems during
677 * writeback however as we have to allocate an array of pointers for the
678 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
680 * For reads, there is a similar problem as we need to allocate an array
681 * of kvecs to handle the receive, though that should only need to be done
684 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
685 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
688 * When the server doesn't allow large posix writes, only allow a rsize/wsize
689 * of 2^17-1 minus the size of the call header. That allows for a read or
690 * write up to the maximum size described by RFC1002.
692 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
693 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
696 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
697 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
698 * a single wsize request with a single call.
700 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
703 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
704 * those values when posix extensions aren't in force. In actuality here, we
705 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
706 * to be ok with the extra byte even though Windows doesn't send writes that
711 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
713 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
714 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
717 * Macros to allow the TCP_Server_Info->net field and related code to drop out
718 * when CONFIG_NET_NS isn't set.
723 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
728 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
735 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
740 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
747 * Session structure. One of these for each uid session with a particular host
750 struct list_head smb_ses_list;
751 struct list_head tcon_list;
752 struct mutex session_mutex;
753 struct TCP_Server_Info *server; /* pointer to server info */
754 int ses_count; /* reference counter */
755 enum statusEnum status;
756 unsigned overrideSecFlg; /* if non-zero override global sec flags */
757 __u16 ipc_tid; /* special tid for connection to IPC share */
758 char *serverOS; /* name of operating system underlying server */
759 char *serverNOS; /* name of network operating system of server */
760 char *serverDomain; /* security realm of server */
761 __u64 Suid; /* remote smb uid */
762 kuid_t linux_uid; /* overriding owner of files on the mount */
763 kuid_t cred_uid; /* owner of credentials */
764 unsigned int capabilities;
765 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
766 TCP names - will ipv6 and sctp addresses fit? */
767 char *user_name; /* must not be null except during init of sess
768 and after mount option parsing we fill it */
771 struct session_key auth_key;
772 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
773 enum securityEnum sectype; /* what security flavor was specified? */
774 bool sign; /* is signing required? */
775 bool need_reconnect:1; /* connection reset, uid now invalid */
776 #ifdef CONFIG_CIFS_SMB2
778 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
779 #endif /* CONFIG_CIFS_SMB2 */
783 cap_unix(struct cifs_ses *ses)
785 return ses->server->vals->cap_unix & ses->capabilities;
789 * there is one of these for each connection to a resource on a particular
793 struct list_head tcon_list;
795 struct list_head openFileList;
796 struct cifs_ses *ses; /* pointer to session associated with */
797 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
798 char *nativeFileSystem;
799 char *password; /* for share-level security */
800 __u32 tid; /* The 4 byte tree id */
801 __u16 Flags; /* optional support bits */
802 enum statusEnum tidStatus;
803 #ifdef CONFIG_CIFS_STATS
804 atomic_t num_smbs_sent;
809 atomic_t num_flushes;
810 atomic_t num_oplock_brks;
813 atomic_t num_deletes;
815 atomic_t num_posixopens;
816 atomic_t num_posixmkdirs;
818 atomic_t num_renames;
819 atomic_t num_t2renames;
823 atomic_t num_hardlinks;
824 atomic_t num_symlinks;
826 atomic_t num_acl_get;
827 atomic_t num_acl_set;
829 #ifdef CONFIG_CIFS_SMB2
831 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
832 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
834 #endif /* CONFIG_CIFS_SMB2 */
836 #ifdef CONFIG_CIFS_STATS2
837 unsigned long long time_writes;
838 unsigned long long time_reads;
839 unsigned long long time_opens;
840 unsigned long long time_deletes;
841 unsigned long long time_closes;
842 unsigned long long time_mkdirs;
843 unsigned long long time_rmdirs;
844 unsigned long long time_renames;
845 unsigned long long time_t2renames;
846 unsigned long long time_ffirst;
847 unsigned long long time_fnext;
848 unsigned long long time_fclose;
849 #endif /* CONFIG_CIFS_STATS2 */
852 spinlock_t stat_lock;
853 #endif /* CONFIG_CIFS_STATS */
854 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
855 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
856 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
857 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
860 bool seal:1; /* transport encryption for this mounted share */
861 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
862 for this mount even if server would support */
863 bool local_lease:1; /* check leases (only) on local system not remote */
864 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
865 bool need_reconnect:1; /* connection reset, tid now invalid */
866 #ifdef CONFIG_CIFS_SMB2
867 bool print:1; /* set if connection to printer share */
868 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
871 __u32 maximal_access;
872 __u32 vol_serial_number;
873 __le64 vol_create_time;
874 __u32 ss_flags; /* sector size flags */
875 __u32 perf_sector_size; /* best sector size for perf */
877 __u32 max_bytes_chunk;
878 __u32 max_bytes_copy;
879 #endif /* CONFIG_CIFS_SMB2 */
880 #ifdef CONFIG_CIFS_FSCACHE
881 u64 resource_id; /* server resource id */
882 struct fscache_cookie *fscache; /* cookie for share */
884 struct list_head pending_opens; /* list of incomplete opens */
885 /* BB add field for back pointer to sb struct(s)? */
889 * This is a refcounted and timestamped container for a tcon pointer. The
890 * container holds a tcon reference. It is considered safe to free one of
891 * these when the tl_count goes to 0. The tl_time is the time of the last
892 * "get" on the container.
895 struct rb_node tl_rbnode;
897 unsigned long tl_flags;
898 #define TCON_LINK_MASTER 0
899 #define TCON_LINK_PENDING 1
900 #define TCON_LINK_IN_TREE 2
901 unsigned long tl_time;
903 struct cifs_tcon *tl_tcon;
906 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
908 static inline struct cifs_tcon *
909 tlink_tcon(struct tcon_link *tlink)
911 return tlink->tl_tcon;
914 extern void cifs_put_tlink(struct tcon_link *tlink);
916 static inline struct tcon_link *
917 cifs_get_tlink(struct tcon_link *tlink)
919 if (tlink && !IS_ERR(tlink))
920 atomic_inc(&tlink->tl_count);
924 /* This function is always expected to succeed */
925 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
927 #define CIFS_OPLOCK_NO_CHANGE 0xfe
929 struct cifs_pending_open {
930 struct list_head olist;
931 struct tcon_link *tlink;
937 * This info hangs off the cifsFileInfo structure, pointed to by llist.
938 * This is used to track byte stream locks on the file
940 struct cifsLockInfo {
941 struct list_head llist; /* pointer to next cifsLockInfo */
942 struct list_head blist; /* pointer to locks blocked on this */
943 wait_queue_head_t block_q;
951 * One of these for each open instance of a file
953 struct cifs_search_info {
954 loff_t index_of_last_entry;
955 __u16 entries_in_buffer;
958 char *ntwrk_buf_start;
959 char *srch_entries_start;
961 const char *presume_name;
962 unsigned int resume_name_len;
966 bool smallBuf:1; /* so we know which buf_release function to call */
969 struct cifs_open_parms {
970 struct cifs_tcon *tcon;
971 struct cifs_sb_info *cifs_sb;
976 struct cifs_fid *fid;
982 #ifdef CONFIG_CIFS_SMB2
983 __u64 persistent_fid; /* persist file id for smb2 */
984 __u64 volatile_fid; /* volatile file id for smb2 */
985 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
987 struct cifs_pending_open *pending_open;
992 struct cifs_fid_locks {
993 struct list_head llist;
994 struct cifsFileInfo *cfile; /* fid that owns locks */
995 struct list_head locks; /* locks held by fid above */
998 struct cifsFileInfo {
999 struct list_head tlist; /* pointer to next fid owned by tcon */
1000 struct list_head flist; /* next fid (file instance) for this inode */
1001 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1002 kuid_t uid; /* allows finding which FileInfo structure */
1003 __u32 pid; /* process id who opened file */
1004 struct cifs_fid fid; /* file id from remote */
1005 /* BB add lock scope info here if needed */ ;
1006 /* lock scope id (0 if none) */
1007 struct dentry *dentry;
1008 unsigned int f_flags;
1009 struct tcon_link *tlink;
1010 bool invalidHandle:1; /* file closed via session abend */
1011 bool oplock_break_cancelled:1;
1012 int count; /* refcount protected by cifs_file_list_lock */
1013 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1014 struct cifs_search_info srch_inf;
1015 struct work_struct oplock_break; /* work for oplock breaks */
1018 struct cifs_io_parms {
1020 #ifdef CONFIG_CIFS_SMB2
1021 __u64 persistent_fid; /* persist file id for smb2 */
1022 __u64 volatile_fid; /* volatile file id for smb2 */
1026 unsigned int length;
1027 struct cifs_tcon *tcon;
1030 struct cifs_readdata;
1032 /* asynchronous read support */
1033 struct cifs_readdata {
1034 struct kref refcount;
1035 struct list_head list;
1036 struct completion done;
1037 struct cifsFileInfo *cfile;
1038 struct address_space *mapping;
1043 struct work_struct work;
1044 int (*read_into_pages)(struct TCP_Server_Info *server,
1045 struct cifs_readdata *rdata,
1048 unsigned int pagesz;
1049 unsigned int tailsz;
1050 unsigned int nr_pages;
1051 struct page *pages[];
1054 struct cifs_writedata;
1056 /* asynchronous write support */
1057 struct cifs_writedata {
1058 struct kref refcount;
1059 struct list_head list;
1060 struct completion done;
1061 enum writeback_sync_modes sync_mode;
1062 struct work_struct work;
1063 struct cifsFileInfo *cfile;
1068 unsigned int pagesz;
1069 unsigned int tailsz;
1070 unsigned int nr_pages;
1071 struct page *pages[];
1075 * Take a reference on the file private data. Must be called with
1076 * cifs_file_list_lock held.
1079 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1084 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1085 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1087 #define CIFS_CACHE_READ_FLG 1
1088 #define CIFS_CACHE_HANDLE_FLG 2
1089 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1090 #define CIFS_CACHE_WRITE_FLG 4
1091 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1092 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1094 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1095 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1096 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1099 * One of these for each file inode
1102 struct cifsInodeInfo {
1103 bool can_cache_brlcks;
1104 struct list_head llist; /* locks helb by this inode */
1105 struct rw_semaphore lock_sem; /* protect the fields above */
1106 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1107 struct list_head openFileList;
1108 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1109 unsigned int oplock; /* oplock/lease level we have */
1110 unsigned int epoch; /* used to track lease state changes */
1111 bool delete_pending; /* DELETE_ON_CLOSE is set */
1112 bool invalid_mapping; /* pagecache is invalid */
1113 unsigned long flags;
1114 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1115 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1116 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1117 spinlock_t writers_lock;
1118 unsigned int writers; /* Number of writers on this inode */
1119 unsigned long time; /* jiffies of last update of inode */
1120 u64 server_eof; /* current file size on server -- protected by i_lock */
1121 u64 uniqueid; /* server inode number */
1122 u64 createtime; /* creation time on server */
1123 #ifdef CONFIG_CIFS_SMB2
1124 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1126 #ifdef CONFIG_CIFS_FSCACHE
1127 struct fscache_cookie *fscache;
1129 struct inode vfs_inode;
1132 static inline struct cifsInodeInfo *
1133 CIFS_I(struct inode *inode)
1135 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1138 static inline struct cifs_sb_info *
1139 CIFS_SB(struct super_block *sb)
1141 return sb->s_fs_info;
1144 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1146 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1153 convert_delimiter(char *path, char delim)
1155 char old_delim, *pos;
1163 while ((pos = strchr(pos, old_delim)))
1167 #ifdef CONFIG_CIFS_STATS
1168 #define cifs_stats_inc atomic_inc
1170 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1174 spin_lock(&tcon->stat_lock);
1175 tcon->bytes_written += bytes;
1176 spin_unlock(&tcon->stat_lock);
1180 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1183 spin_lock(&tcon->stat_lock);
1184 tcon->bytes_read += bytes;
1185 spin_unlock(&tcon->stat_lock);
1189 #define cifs_stats_inc(field) do {} while (0)
1190 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1191 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1197 * This is the prototype for the mid receive function. This function is for
1198 * receiving the rest of the SMB frame, starting with the WordCount (which is
1199 * just after the MID in struct smb_hdr). Note:
1201 * - This will be called by cifsd, with no locks held.
1202 * - The mid will still be on the pending_mid_q.
1203 * - mid->resp_buf will point to the current buffer.
1205 * Returns zero on a successful receive, or an error. The receive state in
1206 * the TCP_Server_Info will also be updated.
1208 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1209 struct mid_q_entry *mid);
1212 * This is the prototype for the mid callback function. This is called once the
1213 * mid has been received off of the socket. When creating one, take special
1214 * care to avoid deadlocks. Things to bear in mind:
1216 * - it will be called by cifsd, with no locks held
1217 * - the mid will be removed from any lists
1219 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1221 /* one of these for every pending CIFS request to the server */
1222 struct mid_q_entry {
1223 struct list_head qhead; /* mids waiting on reply from this server */
1224 struct TCP_Server_Info *server; /* server corresponding to this mid */
1225 __u64 mid; /* multiplex id */
1226 __u32 pid; /* process id */
1227 __u32 sequence_number; /* for CIFS signing */
1228 unsigned long when_alloc; /* when mid was created */
1229 #ifdef CONFIG_CIFS_STATS2
1230 unsigned long when_sent; /* time when smb send finished */
1231 unsigned long when_received; /* when demux complete (taken off wire) */
1233 mid_receive_t *receive; /* call receive callback */
1234 mid_callback_t *callback; /* call completion callback */
1235 void *callback_data; /* general purpose pointer for callback */
1236 void *resp_buf; /* pointer to received SMB header */
1237 int mid_state; /* wish this were enum but can not pass to wait_event */
1238 __le16 command; /* smb command code */
1239 bool large_buf:1; /* if valid response, is pointer to large buf */
1240 bool multiRsp:1; /* multiple trans2 responses for one request */
1241 bool multiEnd:1; /* both received */
1244 /* Make code in transport.c a little cleaner by moving
1245 update of optional stats into function below */
1246 #ifdef CONFIG_CIFS_STATS2
1248 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1250 atomic_inc(&server->in_send);
1253 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1255 atomic_dec(&server->in_send);
1258 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1260 atomic_inc(&server->num_waiters);
1263 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1265 atomic_dec(&server->num_waiters);
1268 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1270 mid->when_sent = jiffies;
1273 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1276 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1280 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1284 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1288 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1293 /* for pending dnotify requests */
1294 struct dir_notify_req {
1295 struct list_head lhead;
1302 __u32 filter; /* CompletionFilter (for multishot) */
1307 struct dfs_info3_param {
1308 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1317 * common struct for holding inode info when searching for or updating an
1318 * inode with new info
1321 #define CIFS_FATTR_DFS_REFERRAL 0x1
1322 #define CIFS_FATTR_DELETE_PENDING 0x2
1323 #define CIFS_FATTR_NEED_REVAL 0x4
1324 #define CIFS_FATTR_INO_COLLISION 0x8
1325 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1338 unsigned int cf_nlink;
1339 unsigned int cf_dtype;
1340 struct timespec cf_atime;
1341 struct timespec cf_mtime;
1342 struct timespec cf_ctime;
1345 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1348 kfree(param->path_name);
1349 kfree(param->node_name);
1354 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1355 int number_of_items)
1358 if ((number_of_items == 0) || (param == NULL))
1360 for (i = 0; i < number_of_items; i++) {
1361 kfree(param[i].path_name);
1362 kfree(param[i].node_name);
1368 #define MID_REQUEST_ALLOCATED 1
1369 #define MID_REQUEST_SUBMITTED 2
1370 #define MID_RESPONSE_RECEIVED 4
1371 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1372 #define MID_RESPONSE_MALFORMED 0x10
1373 #define MID_SHUTDOWN 0x20
1375 /* Types of response buffer returned from SendReceive2 */
1376 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1377 #define CIFS_SMALL_BUFFER 1
1378 #define CIFS_LARGE_BUFFER 2
1379 #define CIFS_IOVEC 4 /* array of response buffers */
1381 /* Type of Request to SendReceive2 */
1382 #define CIFS_BLOCKING_OP 1 /* operation can block */
1383 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1384 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1385 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1386 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1387 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1389 /* Type of request operation */
1390 #define CIFS_ECHO_OP 0x080 /* echo request */
1391 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1392 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1393 #define CIFS_OP_MASK 0x0380 /* mask request type */
1395 /* Security Flags: indicate type of session setup needed */
1396 #define CIFSSEC_MAY_SIGN 0x00001
1397 #define CIFSSEC_MAY_NTLM 0x00002
1398 #define CIFSSEC_MAY_NTLMV2 0x00004
1399 #define CIFSSEC_MAY_KRB5 0x00008
1400 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1401 #define CIFSSEC_MAY_LANMAN 0x00010
1402 #define CIFSSEC_MAY_PLNTXT 0x00020
1404 #define CIFSSEC_MAY_LANMAN 0
1405 #define CIFSSEC_MAY_PLNTXT 0
1406 #endif /* weak passwords */
1407 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1408 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1410 #define CIFSSEC_MUST_SIGN 0x01001
1411 /* note that only one of the following can be set so the
1412 result of setting MUST flags more than once will be to
1413 require use of the stronger protocol */
1414 #define CIFSSEC_MUST_NTLM 0x02002
1415 #define CIFSSEC_MUST_NTLMV2 0x04004
1416 #define CIFSSEC_MUST_KRB5 0x08008
1417 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1418 #define CIFSSEC_MUST_LANMAN 0x10010
1419 #define CIFSSEC_MUST_PLNTXT 0x20020
1420 #ifdef CONFIG_CIFS_UPCALL
1421 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1423 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1425 #else /* do not allow weak pw hash */
1426 #define CIFSSEC_MUST_LANMAN 0
1427 #define CIFSSEC_MUST_PLNTXT 0
1428 #ifdef CONFIG_CIFS_UPCALL
1429 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1431 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1433 #endif /* WEAK_PW_HASH */
1434 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1435 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1437 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1438 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1439 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1441 *****************************************************************
1442 * All constants go here
1443 *****************************************************************
1446 #define UID_HASH (16)
1449 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1450 * following to be declared.
1453 /****************************************************************************
1454 * Locking notes. All updates to global variables and lists should be
1455 * protected by spinlocks or semaphores.
1459 * GlobalMid_Lock protects:
1460 * list operations on pending_mid_q and oplockQ
1461 * updates to XID counters, multiplex id and SMB sequence numbers
1462 * cifs_file_list_lock protects:
1463 * list operations on tcp and SMB session lists and tCon lists
1464 * f_owner.lock protects certain per file struct operations
1465 * mapping->page_lock protects certain per page operations
1469 * sesSem operations on smb session
1470 * tconSem operations on tree connection
1471 * fh_sem file handle reconnection operations
1473 ****************************************************************************/
1475 #ifdef DECLARE_GLOBALS_HERE
1476 #define GLOBAL_EXTERN
1478 #define GLOBAL_EXTERN extern
1482 * the list of TCP_Server_Info structures, ie each of the sockets
1483 * connecting our client to a distinct server (ip address), is
1484 * chained together by cifs_tcp_ses_list. The list of all our SMB
1485 * sessions (and from that the tree connections) can be found
1486 * by iterating over cifs_tcp_ses_list
1488 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1491 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1492 * tcp session, and the list of tcon's per smb session. It also protects
1493 * the reference counters for the server, smb session, and tcon. Finally,
1494 * changes to the tcon->tidStatus should be done while holding this lock.
1496 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1499 * This lock protects the cifs_file->llist and cifs_file->flist
1500 * list operations, and updates to some flags (cifs_file->invalidHandle)
1501 * It will be moved to either use the tcon->stat_lock or equivalent later.
1502 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1503 * the cifs_tcp_ses_lock must be grabbed first and released last.
1505 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1507 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1508 /* Outstanding dir notify requests */
1509 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1510 /* DirNotify response queue */
1511 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1512 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1515 * Global transaction id (XID) information
1517 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1518 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1519 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1520 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1521 /* on midQ entries */
1523 * Global counters, updated atomically
1525 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1526 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1527 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1528 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1529 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1531 /* Various Debug counters */
1532 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1533 #ifdef CONFIG_CIFS_STATS2
1534 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1535 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1537 GLOBAL_EXTERN atomic_t smBufAllocCount;
1538 GLOBAL_EXTERN atomic_t midCount;
1541 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1542 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1543 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1544 with more secure ntlmssp2 challenge/resp */
1545 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1546 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1547 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1548 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1549 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1550 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1552 #ifdef CONFIG_CIFS_ACL
1553 GLOBAL_EXTERN struct rb_root uidtree;
1554 GLOBAL_EXTERN struct rb_root gidtree;
1555 GLOBAL_EXTERN spinlock_t siduidlock;
1556 GLOBAL_EXTERN spinlock_t sidgidlock;
1557 GLOBAL_EXTERN struct rb_root siduidtree;
1558 GLOBAL_EXTERN struct rb_root sidgidtree;
1559 GLOBAL_EXTERN spinlock_t uidsidlock;
1560 GLOBAL_EXTERN spinlock_t gidsidlock;
1561 #endif /* CONFIG_CIFS_ACL */
1563 void cifs_oplock_break(struct work_struct *work);
1565 extern const struct slow_work_ops cifs_oplock_break_ops;
1566 extern struct workqueue_struct *cifsiod_wq;
1568 extern mempool_t *cifs_mid_poolp;
1570 /* Operations for different SMB versions */
1571 #define SMB1_VERSION_STRING "1.0"
1572 extern struct smb_version_operations smb1_operations;
1573 extern struct smb_version_values smb1_values;
1574 #define SMB20_VERSION_STRING "2.0"
1575 extern struct smb_version_operations smb20_operations;
1576 extern struct smb_version_values smb20_values;
1577 #define SMB21_VERSION_STRING "2.1"
1578 extern struct smb_version_operations smb21_operations;
1579 extern struct smb_version_values smb21_values;
1580 #define SMB30_VERSION_STRING "3.0"
1581 extern struct smb_version_operations smb30_operations;
1582 extern struct smb_version_values smb30_values;
1583 #define SMB302_VERSION_STRING "3.02"
1584 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1585 extern struct smb_version_values smb302_values;
1586 #endif /* _CIFS_GLOB_H */