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 *);
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 /* check if we can send an echo or nor */
282 bool (*can_echo)(struct TCP_Server_Info *);
283 /* send echo request */
284 int (*echo)(struct TCP_Server_Info *);
285 /* create directory */
286 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
287 struct cifs_sb_info *);
288 /* set info on created directory */
289 void (*mkdir_setinfo)(struct inode *, const char *,
290 struct cifs_sb_info *, struct cifs_tcon *,
292 /* remove directory */
293 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
294 struct cifs_sb_info *);
296 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
297 struct cifs_sb_info *);
298 /* open, rename and delete file */
299 int (*rename_pending_delete)(const char *, struct dentry *,
301 /* send rename request */
302 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
303 const char *, struct cifs_sb_info *);
304 /* send create hardlink request */
305 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
306 const char *, const char *,
307 struct cifs_sb_info *);
308 /* query symlink target */
309 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
310 const char *, char **, struct cifs_sb_info *);
311 /* open a file for non-posix mounts */
312 int (*open)(const unsigned int, struct cifs_open_parms *,
313 __u32 *, FILE_ALL_INFO *);
314 /* set fid protocol-specific info */
315 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
317 void (*close)(const unsigned int, struct cifs_tcon *,
319 /* send a flush request to the server */
320 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
321 /* async read from the server */
322 int (*async_readv)(struct cifs_readdata *);
323 /* async write to the server */
324 int (*async_writev)(struct cifs_writedata *);
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)(const unsigned char *, char *, unsigned int *,
372 struct cifs_sb_info *, unsigned int);
373 /* if we can do cache read operations */
374 bool (*is_read_op)(__u32);
375 /* set oplock level for the inode */
376 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
378 /* create lease context buffer for CREATE request */
379 char * (*create_lease_buf)(u8 *, u8);
380 /* parse lease context buffer and return oplock/epoch info */
381 __u8 (*parse_lease_buf)(void *, unsigned int *);
384 struct smb_version_values {
385 char *version_string;
387 __u32 req_capabilities;
388 __u32 large_lock_type;
389 __u32 exclusive_lock_type;
390 __u32 shared_lock_type;
391 __u32 unlock_lock_type;
393 size_t max_header_size;
394 size_t read_rsp_size;
396 unsigned int cap_unix;
397 unsigned int cap_nt_find;
398 unsigned int cap_large_files;
399 __u16 signing_enabled;
400 __u16 signing_required;
401 size_t create_lease_size;
404 #define HEADER_SIZE(server) (server->vals->header_size)
405 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
412 char *iocharset; /* local code page for mapping to and from Unicode */
413 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
414 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
422 enum securityEnum sectype; /* sectype requested via mnt opts */
423 bool sign; /* was signing requested via mnt opts? */
431 bool no_psx_acl:1; /* set if posix acl support should be disabled */
433 bool backupuid_specified; /* mount option backupuid is specified */
434 bool backupgid_specified; /* mount option backupgid is specified */
435 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
436 bool server_ino:1; /* use inode numbers from server ie UniqueId */
438 bool strict_io:1; /* strict cache behavior */
439 bool remap:1; /* set to remap seven reserved chars in filenames */
440 bool posix_paths:1; /* unset to not ask for posix pathnames. */
443 bool nullauth:1; /* attempt to authenticate with null user */
444 bool nocase:1; /* request case insensitive filenames */
445 bool nobrl:1; /* disable sending byte range locks to srv */
446 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
447 bool seal:1; /* request transport encryption on share */
448 bool nodfs:1; /* Do not request DFS, even if available */
449 bool local_lease:1; /* check leases only on local system, not remote */
452 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
453 bool fsc:1; /* enable fscache */
454 bool mfsymlinks:1; /* use Minshall+French Symlinks */
456 bool rwpidforward:1; /* pid forward for read/write operations */
460 bool sockopt_tcp_nodelay:1;
461 unsigned long actimeo; /* attribute cache timeout (jiffies) */
462 struct smb_version_operations *ops;
463 struct smb_version_values *vals;
465 struct sockaddr_storage dstaddr; /* destination address */
466 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
467 struct nls_table *local_nls;
470 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
471 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
472 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
473 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
474 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
475 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
476 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
477 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
478 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
479 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
481 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
482 MS_NODEV | MS_SYNCHRONOUS)
484 struct cifs_mnt_data {
485 struct cifs_sb_info *cifs_sb;
490 static inline unsigned int
491 get_rfc1002_length(void *buf)
493 return be32_to_cpu(*((__be32 *)buf));
497 inc_rfc1001_len(void *buf, int count)
499 be32_add_cpu((__be32 *)buf, count);
502 struct TCP_Server_Info {
503 struct list_head tcp_ses_list;
504 struct list_head smb_ses_list;
505 int srv_count; /* reference counter */
506 /* 15 character server name + 0x20 16th byte indicating type = srv */
507 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
508 struct smb_version_operations *ops;
509 struct smb_version_values *vals;
510 enum statusEnum tcpStatus; /* what we think the status is */
511 char *hostname; /* hostname portion of UNC string */
512 struct socket *ssocket;
513 struct sockaddr_storage dstaddr;
514 struct sockaddr_storage srcaddr; /* locally bind to this IP */
518 wait_queue_head_t response_q;
519 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
520 struct list_head pending_mid_q;
521 bool noblocksnd; /* use blocking sendmsg */
522 bool noautotune; /* do not autotune send buf sizes */
524 int credits; /* send no more requests at once */
525 unsigned int in_flight; /* number of requests on the wire to server */
526 spinlock_t req_lock; /* protect the two values above */
527 struct mutex srv_mutex;
528 struct task_struct *tsk;
529 char server_GUID[16];
531 bool sign; /* is signing enabled on this connection? */
532 bool session_estab; /* mark when very first sess is established */
533 #ifdef CONFIG_CIFS_SMB2
534 int echo_credits; /* echo reserved slots */
535 int oplock_credits; /* oplock break reserved slots */
536 bool echoes:1; /* enable echoes */
538 u16 dialect; /* dialect index that server chose */
539 bool oplocks:1; /* enable oplocks */
540 unsigned int maxReq; /* Clients should submit no more */
541 /* than maxReq distinct unanswered SMBs to the server when using */
542 /* multiplexed reads or writes */
543 unsigned int maxBuf; /* maxBuf specifies the maximum */
544 /* message size the server can send or receive for non-raw SMBs */
545 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
546 /* when socket is setup (and during reconnect) before NegProt sent */
547 unsigned int max_rw; /* maxRw specifies the maximum */
548 /* message size the server can send or receive for */
549 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
550 unsigned int capabilities; /* selective disabling of caps by smb sess */
551 int timeAdj; /* Adjust for difference in server time zone in sec */
552 __u64 CurrentMid; /* multiplex id - rotating counter */
553 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
554 /* 16th byte of RFC1001 workstation name is always null */
555 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
556 __u32 sequence_number; /* for signing, protected by srv_mutex */
557 struct session_key session_key;
558 unsigned long lstrp; /* when we got last response from this server */
559 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
560 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
561 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
562 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
563 char negflavor; /* NEGOTIATE response flavor */
564 /* extended security flavors that server supports */
565 bool sec_ntlmssp; /* supports NTLMSSP */
566 bool sec_kerberosu2u; /* supports U2U Kerberos */
567 bool sec_kerberos; /* supports plain Kerberos */
568 bool sec_mskerberos; /* supports legacy MS Kerberos */
569 bool large_buf; /* is current buffer large? */
570 struct delayed_work echo; /* echo ping workqueue job */
571 struct kvec *iov; /* reusable kvec array for receives */
572 unsigned int nr_iov; /* number of kvecs in array */
573 char *smallbuf; /* pointer to current "small" buffer */
574 char *bigbuf; /* pointer to current "big" buffer */
575 unsigned int total_read; /* total amount of data read in this pass */
576 #ifdef CONFIG_CIFS_FSCACHE
577 struct fscache_cookie *fscache; /* client index cache cookie */
579 #ifdef CONFIG_CIFS_STATS2
580 atomic_t in_send; /* requests trying to send */
581 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
583 #ifdef CONFIG_CIFS_SMB2
584 unsigned int max_read;
585 unsigned int max_write;
586 #endif /* CONFIG_CIFS_SMB2 */
589 static inline unsigned int
590 in_flight(struct TCP_Server_Info *server)
593 spin_lock(&server->req_lock);
594 num = server->in_flight;
595 spin_unlock(&server->req_lock);
600 has_credits(struct TCP_Server_Info *server, int *credits)
603 spin_lock(&server->req_lock);
605 spin_unlock(&server->req_lock);
610 add_credits(struct TCP_Server_Info *server, const unsigned int add,
613 server->ops->add_credits(server, add, optype);
617 set_credits(struct TCP_Server_Info *server, const int val)
619 server->ops->set_credits(server, val);
623 get_next_mid(struct TCP_Server_Info *server)
625 return server->ops->get_next_mid(server);
629 * When the server supports very large reads and writes via POSIX extensions,
630 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
631 * including the RFC1001 length.
633 * Note that this might make for "interesting" allocation problems during
634 * writeback however as we have to allocate an array of pointers for the
635 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
637 * For reads, there is a similar problem as we need to allocate an array
638 * of kvecs to handle the receive, though that should only need to be done
641 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
642 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
645 * When the server doesn't allow large posix writes, only allow a rsize/wsize
646 * of 2^17-1 minus the size of the call header. That allows for a read or
647 * write up to the maximum size described by RFC1002.
649 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
650 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
653 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
654 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
655 * a single wsize request with a single call.
657 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
660 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
661 * those values when posix extensions aren't in force. In actuality here, we
662 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
663 * to be ok with the extra byte even though Windows doesn't send writes that
668 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
670 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
671 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
674 * Macros to allow the TCP_Server_Info->net field and related code to drop out
675 * when CONFIG_NET_NS isn't set.
680 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
685 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
692 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
697 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
704 * Session structure. One of these for each uid session with a particular host
707 struct list_head smb_ses_list;
708 struct list_head tcon_list;
709 struct mutex session_mutex;
710 struct TCP_Server_Info *server; /* pointer to server info */
711 int ses_count; /* reference counter */
712 enum statusEnum status;
713 unsigned overrideSecFlg; /* if non-zero override global sec flags */
714 __u16 ipc_tid; /* special tid for connection to IPC share */
715 char *serverOS; /* name of operating system underlying server */
716 char *serverNOS; /* name of network operating system of server */
717 char *serverDomain; /* security realm of server */
718 __u64 Suid; /* remote smb uid */
719 kuid_t linux_uid; /* overriding owner of files on the mount */
720 kuid_t cred_uid; /* owner of credentials */
721 unsigned int capabilities;
722 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
723 TCP names - will ipv6 and sctp addresses fit? */
724 char *user_name; /* must not be null except during init of sess
725 and after mount option parsing we fill it */
728 struct session_key auth_key;
729 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
730 enum securityEnum sectype; /* what security flavor was specified? */
731 bool sign; /* is signing required? */
732 bool need_reconnect:1; /* connection reset, uid now invalid */
733 #ifdef CONFIG_CIFS_SMB2
735 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
736 #endif /* CONFIG_CIFS_SMB2 */
740 cap_unix(struct cifs_ses *ses)
742 return ses->server->vals->cap_unix & ses->capabilities;
746 * there is one of these for each connection to a resource on a particular
750 struct list_head tcon_list;
752 struct list_head openFileList;
753 struct cifs_ses *ses; /* pointer to session associated with */
754 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
755 char *nativeFileSystem;
756 char *password; /* for share-level security */
757 __u32 tid; /* The 4 byte tree id */
758 __u16 Flags; /* optional support bits */
759 enum statusEnum tidStatus;
760 #ifdef CONFIG_CIFS_STATS
761 atomic_t num_smbs_sent;
766 atomic_t num_flushes;
767 atomic_t num_oplock_brks;
770 atomic_t num_deletes;
772 atomic_t num_posixopens;
773 atomic_t num_posixmkdirs;
775 atomic_t num_renames;
776 atomic_t num_t2renames;
780 atomic_t num_hardlinks;
781 atomic_t num_symlinks;
783 atomic_t num_acl_get;
784 atomic_t num_acl_set;
786 #ifdef CONFIG_CIFS_SMB2
788 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
789 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
791 #endif /* CONFIG_CIFS_SMB2 */
793 #ifdef CONFIG_CIFS_STATS2
794 unsigned long long time_writes;
795 unsigned long long time_reads;
796 unsigned long long time_opens;
797 unsigned long long time_deletes;
798 unsigned long long time_closes;
799 unsigned long long time_mkdirs;
800 unsigned long long time_rmdirs;
801 unsigned long long time_renames;
802 unsigned long long time_t2renames;
803 unsigned long long time_ffirst;
804 unsigned long long time_fnext;
805 unsigned long long time_fclose;
806 #endif /* CONFIG_CIFS_STATS2 */
809 spinlock_t stat_lock;
810 #endif /* CONFIG_CIFS_STATS */
811 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
812 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
813 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
814 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
817 bool seal:1; /* transport encryption for this mounted share */
818 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
819 for this mount even if server would support */
820 bool local_lease:1; /* check leases (only) on local system not remote */
821 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
822 bool need_reconnect:1; /* connection reset, tid now invalid */
823 #ifdef CONFIG_CIFS_SMB2
824 bool print:1; /* set if connection to printer share */
825 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
828 __u32 maximal_access;
829 __u32 vol_serial_number;
830 __le64 vol_create_time;
831 #endif /* CONFIG_CIFS_SMB2 */
832 #ifdef CONFIG_CIFS_FSCACHE
833 u64 resource_id; /* server resource id */
834 struct fscache_cookie *fscache; /* cookie for share */
836 struct list_head pending_opens; /* list of incomplete opens */
837 /* BB add field for back pointer to sb struct(s)? */
841 * This is a refcounted and timestamped container for a tcon pointer. The
842 * container holds a tcon reference. It is considered safe to free one of
843 * these when the tl_count goes to 0. The tl_time is the time of the last
844 * "get" on the container.
847 struct rb_node tl_rbnode;
849 unsigned long tl_flags;
850 #define TCON_LINK_MASTER 0
851 #define TCON_LINK_PENDING 1
852 #define TCON_LINK_IN_TREE 2
853 unsigned long tl_time;
855 struct cifs_tcon *tl_tcon;
858 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
860 static inline struct cifs_tcon *
861 tlink_tcon(struct tcon_link *tlink)
863 return tlink->tl_tcon;
866 extern void cifs_put_tlink(struct tcon_link *tlink);
868 static inline struct tcon_link *
869 cifs_get_tlink(struct tcon_link *tlink)
871 if (tlink && !IS_ERR(tlink))
872 atomic_inc(&tlink->tl_count);
876 /* This function is always expected to succeed */
877 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
879 #define CIFS_OPLOCK_NO_CHANGE 0xfe
881 struct cifs_pending_open {
882 struct list_head olist;
883 struct tcon_link *tlink;
889 * This info hangs off the cifsFileInfo structure, pointed to by llist.
890 * This is used to track byte stream locks on the file
892 struct cifsLockInfo {
893 struct list_head llist; /* pointer to next cifsLockInfo */
894 struct list_head blist; /* pointer to locks blocked on this */
895 wait_queue_head_t block_q;
903 * One of these for each open instance of a file
905 struct cifs_search_info {
906 loff_t index_of_last_entry;
907 __u16 entries_in_buffer;
910 char *ntwrk_buf_start;
911 char *srch_entries_start;
913 const char *presume_name;
914 unsigned int resume_name_len;
918 bool smallBuf:1; /* so we know which buf_release function to call */
921 struct cifs_open_parms {
922 struct cifs_tcon *tcon;
923 struct cifs_sb_info *cifs_sb;
928 struct cifs_fid *fid;
934 #ifdef CONFIG_CIFS_SMB2
935 __u64 persistent_fid; /* persist file id for smb2 */
936 __u64 volatile_fid; /* volatile file id for smb2 */
937 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
939 struct cifs_pending_open *pending_open;
944 struct cifs_fid_locks {
945 struct list_head llist;
946 struct cifsFileInfo *cfile; /* fid that owns locks */
947 struct list_head locks; /* locks held by fid above */
950 struct cifsFileInfo {
951 struct list_head tlist; /* pointer to next fid owned by tcon */
952 struct list_head flist; /* next fid (file instance) for this inode */
953 struct cifs_fid_locks *llist; /* brlocks held by this fid */
954 kuid_t uid; /* allows finding which FileInfo structure */
955 __u32 pid; /* process id who opened file */
956 struct cifs_fid fid; /* file id from remote */
957 /* BB add lock scope info here if needed */ ;
958 /* lock scope id (0 if none) */
959 struct dentry *dentry;
960 unsigned int f_flags;
961 struct tcon_link *tlink;
962 bool invalidHandle:1; /* file closed via session abend */
963 bool oplock_break_cancelled:1;
964 int count; /* refcount protected by cifs_file_list_lock */
965 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
966 struct cifs_search_info srch_inf;
967 struct work_struct oplock_break; /* work for oplock breaks */
970 struct cifs_io_parms {
972 #ifdef CONFIG_CIFS_SMB2
973 __u64 persistent_fid; /* persist file id for smb2 */
974 __u64 volatile_fid; /* volatile file id for smb2 */
979 struct cifs_tcon *tcon;
982 struct cifs_readdata;
984 /* asynchronous read support */
985 struct cifs_readdata {
986 struct kref refcount;
987 struct list_head list;
988 struct completion done;
989 struct cifsFileInfo *cfile;
990 struct address_space *mapping;
995 struct work_struct work;
996 int (*read_into_pages)(struct TCP_Server_Info *server,
997 struct cifs_readdata *rdata,
1000 unsigned int pagesz;
1001 unsigned int tailsz;
1002 unsigned int nr_pages;
1003 struct page *pages[];
1006 struct cifs_writedata;
1008 /* asynchronous write support */
1009 struct cifs_writedata {
1010 struct kref refcount;
1011 struct list_head list;
1012 struct completion done;
1013 enum writeback_sync_modes sync_mode;
1014 struct work_struct work;
1015 struct cifsFileInfo *cfile;
1020 unsigned int pagesz;
1021 unsigned int tailsz;
1022 unsigned int nr_pages;
1023 struct page *pages[1];
1027 * Take a reference on the file private data. Must be called with
1028 * cifs_file_list_lock held.
1031 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1036 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1037 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1039 #define CIFS_CACHE_READ_FLG 1
1040 #define CIFS_CACHE_HANDLE_FLG 2
1041 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1042 #define CIFS_CACHE_WRITE_FLG 4
1043 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1044 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1046 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1047 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1048 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1051 * One of these for each file inode
1054 struct cifsInodeInfo {
1055 bool can_cache_brlcks;
1056 struct list_head llist; /* locks helb by this inode */
1057 struct rw_semaphore lock_sem; /* protect the fields above */
1058 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1059 struct list_head openFileList;
1060 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1061 unsigned int oplock; /* oplock/lease level we have */
1062 unsigned int epoch; /* used to track lease state changes */
1063 bool delete_pending; /* DELETE_ON_CLOSE is set */
1064 bool invalid_mapping; /* pagecache is invalid */
1065 unsigned long time; /* jiffies of last update of inode */
1066 u64 server_eof; /* current file size on server -- protected by i_lock */
1067 u64 uniqueid; /* server inode number */
1068 u64 createtime; /* creation time on server */
1069 #ifdef CONFIG_CIFS_SMB2
1070 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1072 #ifdef CONFIG_CIFS_FSCACHE
1073 struct fscache_cookie *fscache;
1075 struct inode vfs_inode;
1078 static inline struct cifsInodeInfo *
1079 CIFS_I(struct inode *inode)
1081 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1084 static inline struct cifs_sb_info *
1085 CIFS_SB(struct super_block *sb)
1087 return sb->s_fs_info;
1090 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1092 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1099 convert_delimiter(char *path, char delim)
1101 char old_delim, *pos;
1109 while ((pos = strchr(pos, old_delim)))
1113 #ifdef CONFIG_CIFS_STATS
1114 #define cifs_stats_inc atomic_inc
1116 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1120 spin_lock(&tcon->stat_lock);
1121 tcon->bytes_written += bytes;
1122 spin_unlock(&tcon->stat_lock);
1126 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1129 spin_lock(&tcon->stat_lock);
1130 tcon->bytes_read += bytes;
1131 spin_unlock(&tcon->stat_lock);
1135 #define cifs_stats_inc(field) do {} while (0)
1136 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1137 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1143 * This is the prototype for the mid receive function. This function is for
1144 * receiving the rest of the SMB frame, starting with the WordCount (which is
1145 * just after the MID in struct smb_hdr). Note:
1147 * - This will be called by cifsd, with no locks held.
1148 * - The mid will still be on the pending_mid_q.
1149 * - mid->resp_buf will point to the current buffer.
1151 * Returns zero on a successful receive, or an error. The receive state in
1152 * the TCP_Server_Info will also be updated.
1154 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1155 struct mid_q_entry *mid);
1158 * This is the prototype for the mid callback function. This is called once the
1159 * mid has been received off of the socket. When creating one, take special
1160 * care to avoid deadlocks. Things to bear in mind:
1162 * - it will be called by cifsd, with no locks held
1163 * - the mid will be removed from any lists
1165 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1167 /* one of these for every pending CIFS request to the server */
1168 struct mid_q_entry {
1169 struct list_head qhead; /* mids waiting on reply from this server */
1170 struct TCP_Server_Info *server; /* server corresponding to this mid */
1171 __u64 mid; /* multiplex id */
1172 __u32 pid; /* process id */
1173 __u32 sequence_number; /* for CIFS signing */
1174 unsigned long when_alloc; /* when mid was created */
1175 #ifdef CONFIG_CIFS_STATS2
1176 unsigned long when_sent; /* time when smb send finished */
1177 unsigned long when_received; /* when demux complete (taken off wire) */
1179 mid_receive_t *receive; /* call receive callback */
1180 mid_callback_t *callback; /* call completion callback */
1181 void *callback_data; /* general purpose pointer for callback */
1182 void *resp_buf; /* pointer to received SMB header */
1183 int mid_state; /* wish this were enum but can not pass to wait_event */
1184 __le16 command; /* smb command code */
1185 bool large_buf:1; /* if valid response, is pointer to large buf */
1186 bool multiRsp:1; /* multiple trans2 responses for one request */
1187 bool multiEnd:1; /* both received */
1190 /* Make code in transport.c a little cleaner by moving
1191 update of optional stats into function below */
1192 #ifdef CONFIG_CIFS_STATS2
1194 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1196 atomic_inc(&server->in_send);
1199 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1201 atomic_dec(&server->in_send);
1204 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1206 atomic_inc(&server->num_waiters);
1209 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1211 atomic_dec(&server->num_waiters);
1214 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1216 mid->when_sent = jiffies;
1219 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1222 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1226 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1230 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1234 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1239 /* for pending dnotify requests */
1240 struct dir_notify_req {
1241 struct list_head lhead;
1248 __u32 filter; /* CompletionFilter (for multishot) */
1253 struct dfs_info3_param {
1254 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1263 * common struct for holding inode info when searching for or updating an
1264 * inode with new info
1267 #define CIFS_FATTR_DFS_REFERRAL 0x1
1268 #define CIFS_FATTR_DELETE_PENDING 0x2
1269 #define CIFS_FATTR_NEED_REVAL 0x4
1270 #define CIFS_FATTR_INO_COLLISION 0x8
1283 unsigned int cf_nlink;
1284 unsigned int cf_dtype;
1285 struct timespec cf_atime;
1286 struct timespec cf_mtime;
1287 struct timespec cf_ctime;
1290 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1293 kfree(param->path_name);
1294 kfree(param->node_name);
1299 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1300 int number_of_items)
1303 if ((number_of_items == 0) || (param == NULL))
1305 for (i = 0; i < number_of_items; i++) {
1306 kfree(param[i].path_name);
1307 kfree(param[i].node_name);
1313 #define MID_REQUEST_ALLOCATED 1
1314 #define MID_REQUEST_SUBMITTED 2
1315 #define MID_RESPONSE_RECEIVED 4
1316 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1317 #define MID_RESPONSE_MALFORMED 0x10
1318 #define MID_SHUTDOWN 0x20
1320 /* Types of response buffer returned from SendReceive2 */
1321 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1322 #define CIFS_SMALL_BUFFER 1
1323 #define CIFS_LARGE_BUFFER 2
1324 #define CIFS_IOVEC 4 /* array of response buffers */
1326 /* Type of Request to SendReceive2 */
1327 #define CIFS_BLOCKING_OP 1 /* operation can block */
1328 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1329 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1330 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1331 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1332 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1334 /* Type of request operation */
1335 #define CIFS_ECHO_OP 0x080 /* echo request */
1336 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1337 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1338 #define CIFS_OP_MASK 0x0380 /* mask request type */
1340 /* Security Flags: indicate type of session setup needed */
1341 #define CIFSSEC_MAY_SIGN 0x00001
1342 #define CIFSSEC_MAY_NTLM 0x00002
1343 #define CIFSSEC_MAY_NTLMV2 0x00004
1344 #define CIFSSEC_MAY_KRB5 0x00008
1345 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1346 #define CIFSSEC_MAY_LANMAN 0x00010
1347 #define CIFSSEC_MAY_PLNTXT 0x00020
1349 #define CIFSSEC_MAY_LANMAN 0
1350 #define CIFSSEC_MAY_PLNTXT 0
1351 #endif /* weak passwords */
1352 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1353 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1355 #define CIFSSEC_MUST_SIGN 0x01001
1356 /* note that only one of the following can be set so the
1357 result of setting MUST flags more than once will be to
1358 require use of the stronger protocol */
1359 #define CIFSSEC_MUST_NTLM 0x02002
1360 #define CIFSSEC_MUST_NTLMV2 0x04004
1361 #define CIFSSEC_MUST_KRB5 0x08008
1362 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1363 #define CIFSSEC_MUST_LANMAN 0x10010
1364 #define CIFSSEC_MUST_PLNTXT 0x20020
1365 #ifdef CONFIG_CIFS_UPCALL
1366 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1368 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1370 #else /* do not allow weak pw hash */
1371 #define CIFSSEC_MUST_LANMAN 0
1372 #define CIFSSEC_MUST_PLNTXT 0
1373 #ifdef CONFIG_CIFS_UPCALL
1374 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1376 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1378 #endif /* WEAK_PW_HASH */
1379 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1380 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1382 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1383 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1384 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1386 *****************************************************************
1387 * All constants go here
1388 *****************************************************************
1391 #define UID_HASH (16)
1394 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1395 * following to be declared.
1398 /****************************************************************************
1399 * Locking notes. All updates to global variables and lists should be
1400 * protected by spinlocks or semaphores.
1404 * GlobalMid_Lock protects:
1405 * list operations on pending_mid_q and oplockQ
1406 * updates to XID counters, multiplex id and SMB sequence numbers
1407 * cifs_file_list_lock protects:
1408 * list operations on tcp and SMB session lists and tCon lists
1409 * f_owner.lock protects certain per file struct operations
1410 * mapping->page_lock protects certain per page operations
1414 * sesSem operations on smb session
1415 * tconSem operations on tree connection
1416 * fh_sem file handle reconnection operations
1418 ****************************************************************************/
1420 #ifdef DECLARE_GLOBALS_HERE
1421 #define GLOBAL_EXTERN
1423 #define GLOBAL_EXTERN extern
1427 * the list of TCP_Server_Info structures, ie each of the sockets
1428 * connecting our client to a distinct server (ip address), is
1429 * chained together by cifs_tcp_ses_list. The list of all our SMB
1430 * sessions (and from that the tree connections) can be found
1431 * by iterating over cifs_tcp_ses_list
1433 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1436 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1437 * tcp session, and the list of tcon's per smb session. It also protects
1438 * the reference counters for the server, smb session, and tcon. Finally,
1439 * changes to the tcon->tidStatus should be done while holding this lock.
1441 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1444 * This lock protects the cifs_file->llist and cifs_file->flist
1445 * list operations, and updates to some flags (cifs_file->invalidHandle)
1446 * It will be moved to either use the tcon->stat_lock or equivalent later.
1447 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1448 * the cifs_tcp_ses_lock must be grabbed first and released last.
1450 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1452 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1453 /* Outstanding dir notify requests */
1454 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1455 /* DirNotify response queue */
1456 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1457 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1460 * Global transaction id (XID) information
1462 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1463 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1464 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1465 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1466 /* on midQ entries */
1468 * Global counters, updated atomically
1470 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1471 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1472 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1473 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1474 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1476 /* Various Debug counters */
1477 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1478 #ifdef CONFIG_CIFS_STATS2
1479 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1480 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1482 GLOBAL_EXTERN atomic_t smBufAllocCount;
1483 GLOBAL_EXTERN atomic_t midCount;
1486 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1487 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1488 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1489 with more secure ntlmssp2 challenge/resp */
1490 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1491 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1492 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1493 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1494 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1495 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1497 #ifdef CONFIG_CIFS_ACL
1498 GLOBAL_EXTERN struct rb_root uidtree;
1499 GLOBAL_EXTERN struct rb_root gidtree;
1500 GLOBAL_EXTERN spinlock_t siduidlock;
1501 GLOBAL_EXTERN spinlock_t sidgidlock;
1502 GLOBAL_EXTERN struct rb_root siduidtree;
1503 GLOBAL_EXTERN struct rb_root sidgidtree;
1504 GLOBAL_EXTERN spinlock_t uidsidlock;
1505 GLOBAL_EXTERN spinlock_t gidsidlock;
1506 #endif /* CONFIG_CIFS_ACL */
1508 void cifs_oplock_break(struct work_struct *work);
1510 extern const struct slow_work_ops cifs_oplock_break_ops;
1511 extern struct workqueue_struct *cifsiod_wq;
1513 extern mempool_t *cifs_mid_poolp;
1515 /* Operations for different SMB versions */
1516 #define SMB1_VERSION_STRING "1.0"
1517 extern struct smb_version_operations smb1_operations;
1518 extern struct smb_version_values smb1_values;
1519 #define SMB20_VERSION_STRING "2.0"
1520 extern struct smb_version_operations smb20_operations;
1521 extern struct smb_version_values smb20_values;
1522 #define SMB21_VERSION_STRING "2.1"
1523 extern struct smb_version_operations smb21_operations;
1524 extern struct smb_version_values smb21_values;
1525 #define SMB30_VERSION_STRING "3.0"
1526 extern struct smb_version_operations smb30_operations;
1527 extern struct smb_version_values smb30_values;
1528 #define SMB302_VERSION_STRING "3.02"
1529 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1530 extern struct smb_version_values smb302_values;
1531 #endif /* _CIFS_GLOB_H */