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 */
174 #ifdef CONFIG_CIFS_SMB311
181 struct TCP_Server_Info;
185 struct dfs_info3_param;
189 struct cifs_readdata;
190 struct cifs_writedata;
191 struct cifs_io_parms;
192 struct cifs_search_info;
193 struct cifsInodeInfo;
194 struct cifs_open_parms;
196 struct smb_version_operations {
197 int (*send_cancel)(struct TCP_Server_Info *, void *,
198 struct mid_q_entry *);
199 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
200 /* setup request: allocate mid, sign message */
201 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
203 /* setup async request: allocate mid, sign message */
204 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
206 /* check response: verify signature, map error */
207 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
209 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
211 void (*set_credits)(struct TCP_Server_Info *, const int);
212 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
213 unsigned int (*get_credits)(struct mid_q_entry *);
214 __u64 (*get_next_mid)(struct TCP_Server_Info *);
215 /* data offset from read response message */
216 unsigned int (*read_data_offset)(char *);
217 /* data length from read response message */
218 unsigned int (*read_data_length)(char *);
219 /* map smb to linux error */
220 int (*map_error)(char *, bool);
221 /* find mid corresponding to the response message */
222 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
223 void (*dump_detail)(void *);
224 void (*clear_stats)(struct cifs_tcon *);
225 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
226 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
227 /* verify the message */
228 int (*check_message)(char *, unsigned int);
229 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
230 void (*downgrade_oplock)(struct TCP_Server_Info *,
231 struct cifsInodeInfo *, bool);
232 /* process transaction2 response */
233 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
235 /* check if we need to negotiate */
236 bool (*need_neg)(struct TCP_Server_Info *);
237 /* negotiate to the server */
238 int (*negotiate)(const unsigned int, struct cifs_ses *);
239 /* set negotiated write size */
240 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
241 /* set negotiated read size */
242 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
243 /* setup smb sessionn */
244 int (*sess_setup)(const unsigned int, struct cifs_ses *,
245 const struct nls_table *);
246 /* close smb session */
247 int (*logoff)(const unsigned int, struct cifs_ses *);
248 /* connect to a server share */
249 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
250 struct cifs_tcon *, const struct nls_table *);
251 /* close tree connecion */
252 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
253 /* get DFS referrals */
254 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
255 const char *, struct dfs_info3_param **,
256 unsigned int *, const struct nls_table *, int);
257 /* informational QFS call */
258 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
259 /* check if a path is accessible or not */
260 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
261 struct cifs_sb_info *, const char *);
262 /* query path data from the server */
263 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
264 struct cifs_sb_info *, const char *,
265 FILE_ALL_INFO *, bool *, bool *);
266 /* query file data from the server */
267 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
268 struct cifs_fid *, FILE_ALL_INFO *);
269 /* get server index number */
270 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
271 struct cifs_sb_info *, const char *,
272 u64 *uniqueid, FILE_ALL_INFO *);
273 /* set size by path */
274 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
275 const char *, __u64, struct cifs_sb_info *, bool);
276 /* set size by file handle */
277 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
278 struct cifsFileInfo *, __u64, bool);
280 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
282 int (*set_compression)(const unsigned int, struct cifs_tcon *,
283 struct cifsFileInfo *);
284 /* check if we can send an echo or nor */
285 bool (*can_echo)(struct TCP_Server_Info *);
286 /* send echo request */
287 int (*echo)(struct TCP_Server_Info *);
288 /* create directory */
289 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
290 struct cifs_sb_info *);
291 /* set info on created directory */
292 void (*mkdir_setinfo)(struct inode *, const char *,
293 struct cifs_sb_info *, struct cifs_tcon *,
295 /* remove directory */
296 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
297 struct cifs_sb_info *);
299 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
300 struct cifs_sb_info *);
301 /* open, rename and delete file */
302 int (*rename_pending_delete)(const char *, struct dentry *,
304 /* send rename request */
305 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
306 const char *, struct cifs_sb_info *);
307 /* send create hardlink request */
308 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
309 const char *, const char *,
310 struct cifs_sb_info *);
311 /* query symlink target */
312 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
313 const char *, char **, struct cifs_sb_info *);
314 /* open a file for non-posix mounts */
315 int (*open)(const unsigned int, struct cifs_open_parms *,
316 __u32 *, FILE_ALL_INFO *);
317 /* set fid protocol-specific info */
318 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
320 void (*close)(const unsigned int, struct cifs_tcon *,
322 /* send a flush request to the server */
323 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
324 /* async read from the server */
325 int (*async_readv)(struct cifs_readdata *);
326 /* async write to the server */
327 int (*async_writev)(struct cifs_writedata *,
328 void (*release)(struct kref *));
329 /* sync read from the server */
330 int (*sync_read)(const unsigned int, struct cifs_fid *,
331 struct cifs_io_parms *, unsigned int *, char **,
333 /* sync write to the server */
334 int (*sync_write)(const unsigned int, struct cifs_fid *,
335 struct cifs_io_parms *, unsigned int *, struct kvec *,
337 /* open dir, start readdir */
338 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
339 const char *, struct cifs_sb_info *,
340 struct cifs_fid *, __u16,
341 struct cifs_search_info *);
342 /* continue readdir */
343 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
345 __u16, struct cifs_search_info *srch_inf);
347 int (*close_dir)(const unsigned int, struct cifs_tcon *,
349 /* calculate a size of SMB message */
350 unsigned int (*calc_smb_size)(void *);
351 /* check for STATUS_PENDING and process it in a positive case */
352 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
353 /* send oplock break response */
354 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
355 struct cifsInodeInfo *);
356 /* query remote filesystem */
357 int (*queryfs)(const unsigned int, struct cifs_tcon *,
359 /* send mandatory brlock to the server */
360 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
361 __u64, __u32, int, int, bool);
362 /* unlock range of mandatory locks */
363 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
365 /* push brlocks from the cache to the server */
366 int (*push_mand_locks)(struct cifsFileInfo *);
367 /* get lease key of the inode */
368 void (*get_lease_key)(struct inode *, struct cifs_fid *);
369 /* set lease key of the inode */
370 void (*set_lease_key)(struct inode *, struct cifs_fid *);
371 /* generate new lease key */
372 void (*new_lease_key)(struct cifs_fid *);
373 int (*generate_signingkey)(struct cifs_ses *);
374 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
375 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
376 struct cifsFileInfo *src_file);
377 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
378 struct cifs_sb_info *, const unsigned char *,
379 char *, unsigned int *);
380 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
381 struct cifs_sb_info *, const unsigned char *,
382 char *, unsigned int *);
383 /* if we can do cache read operations */
384 bool (*is_read_op)(__u32);
385 /* set oplock level for the inode */
386 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
388 /* create lease context buffer for CREATE request */
389 char * (*create_lease_buf)(u8 *, u8);
390 /* parse lease context buffer and return oplock/epoch info */
391 __u8 (*parse_lease_buf)(void *, unsigned int *);
392 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
393 struct cifsFileInfo *target_file, u64 src_off, u64 len,
395 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
396 struct cifsFileInfo *target_file, u64 src_off, u64 len,
398 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
399 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
400 const unsigned char *, const unsigned char *, char *,
401 size_t, const struct nls_table *, int);
402 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
403 const char *, const void *, const __u16,
404 const struct nls_table *, int);
405 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
406 const char *, u32 *);
407 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
408 const struct cifs_fid *, u32 *);
409 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
411 /* writepages retry size */
412 unsigned int (*wp_retry_size)(struct inode *);
413 /* get mtu credits */
414 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
415 unsigned int *, unsigned int *);
416 /* check if we need to issue closedir */
417 bool (*dir_needs_close)(struct cifsFileInfo *);
418 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
422 struct smb_version_values {
423 char *version_string;
425 __u32 req_capabilities;
426 __u32 large_lock_type;
427 __u32 exclusive_lock_type;
428 __u32 shared_lock_type;
429 __u32 unlock_lock_type;
431 size_t max_header_size;
432 size_t read_rsp_size;
434 unsigned int cap_unix;
435 unsigned int cap_nt_find;
436 unsigned int cap_large_files;
437 __u16 signing_enabled;
438 __u16 signing_required;
439 size_t create_lease_size;
442 #define HEADER_SIZE(server) (server->vals->header_size)
443 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
450 char *iocharset; /* local code page for mapping to and from Unicode */
451 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
452 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
460 enum securityEnum sectype; /* sectype requested via mnt opts */
461 bool sign; /* was signing requested via mnt opts? */
469 bool no_psx_acl:1; /* set if posix acl support should be disabled */
471 bool backupuid_specified; /* mount option backupuid is specified */
472 bool backupgid_specified; /* mount option backupgid is specified */
473 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
474 bool server_ino:1; /* use inode numbers from server ie UniqueId */
476 bool strict_io:1; /* strict cache behavior */
477 bool remap:1; /* set to remap seven reserved chars in filenames */
478 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
479 bool posix_paths:1; /* unset to not ask for posix pathnames. */
482 bool nullauth:1; /* attempt to authenticate with null user */
483 bool nocase:1; /* request case insensitive filenames */
484 bool nobrl:1; /* disable sending byte range locks to srv */
485 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
486 bool seal:1; /* request transport encryption on share */
487 bool nodfs:1; /* Do not request DFS, even if available */
488 bool local_lease:1; /* check leases only on local system, not remote */
491 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
492 bool fsc:1; /* enable fscache */
493 bool mfsymlinks:1; /* use Minshall+French Symlinks */
495 bool rwpidforward:1; /* pid forward for read/write operations */
499 bool resilient:1; /* noresilient not required since not fored for CA */
502 bool sockopt_tcp_nodelay:1;
503 unsigned long actimeo; /* attribute cache timeout (jiffies) */
504 struct smb_version_operations *ops;
505 struct smb_version_values *vals;
507 struct sockaddr_storage dstaddr; /* destination address */
508 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
509 struct nls_table *local_nls;
512 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
513 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
514 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
515 CIFS_MOUNT_MAP_SFM_CHR | \
516 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
517 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
518 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
519 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
520 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
521 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
522 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
524 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
525 MS_NODEV | MS_SYNCHRONOUS)
527 struct cifs_mnt_data {
528 struct cifs_sb_info *cifs_sb;
533 static inline unsigned int
534 get_rfc1002_length(void *buf)
536 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
540 inc_rfc1001_len(void *buf, int count)
542 be32_add_cpu((__be32 *)buf, count);
545 struct TCP_Server_Info {
546 struct list_head tcp_ses_list;
547 struct list_head smb_ses_list;
548 int srv_count; /* reference counter */
549 /* 15 character server name + 0x20 16th byte indicating type = srv */
550 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
551 struct smb_version_operations *ops;
552 struct smb_version_values *vals;
553 enum statusEnum tcpStatus; /* what we think the status is */
554 char *hostname; /* hostname portion of UNC string */
555 struct socket *ssocket;
556 struct sockaddr_storage dstaddr;
557 struct sockaddr_storage srcaddr; /* locally bind to this IP */
561 wait_queue_head_t response_q;
562 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
563 struct list_head pending_mid_q;
564 bool noblocksnd; /* use blocking sendmsg */
565 bool noautotune; /* do not autotune send buf sizes */
567 int credits; /* send no more requests at once */
568 unsigned int in_flight; /* number of requests on the wire to server */
569 spinlock_t req_lock; /* protect the two values above */
570 struct mutex srv_mutex;
571 struct task_struct *tsk;
572 char server_GUID[16];
574 bool sign; /* is signing enabled on this connection? */
575 bool session_estab; /* mark when very first sess is established */
576 #ifdef CONFIG_CIFS_SMB2
577 int echo_credits; /* echo reserved slots */
578 int oplock_credits; /* oplock break reserved slots */
579 bool echoes:1; /* enable echoes */
580 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
582 u16 dialect; /* dialect index that server chose */
583 bool oplocks:1; /* enable oplocks */
584 unsigned int maxReq; /* Clients should submit no more */
585 /* than maxReq distinct unanswered SMBs to the server when using */
586 /* multiplexed reads or writes */
587 unsigned int maxBuf; /* maxBuf specifies the maximum */
588 /* message size the server can send or receive for non-raw SMBs */
589 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
590 /* when socket is setup (and during reconnect) before NegProt sent */
591 unsigned int max_rw; /* maxRw specifies the maximum */
592 /* message size the server can send or receive for */
593 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
594 unsigned int capabilities; /* selective disabling of caps by smb sess */
595 int timeAdj; /* Adjust for difference in server time zone in sec */
596 __u64 CurrentMid; /* multiplex id - rotating counter */
597 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
598 /* 16th byte of RFC1001 workstation name is always null */
599 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
600 __u32 sequence_number; /* for signing, protected by srv_mutex */
601 struct session_key session_key;
602 unsigned long lstrp; /* when we got last response from this server */
603 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
604 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
605 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
606 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
607 char negflavor; /* NEGOTIATE response flavor */
608 /* extended security flavors that server supports */
609 bool sec_ntlmssp; /* supports NTLMSSP */
610 bool sec_kerberosu2u; /* supports U2U Kerberos */
611 bool sec_kerberos; /* supports plain Kerberos */
612 bool sec_mskerberos; /* supports legacy MS Kerberos */
613 bool large_buf; /* is current buffer large? */
614 struct delayed_work echo; /* echo ping workqueue job */
615 struct kvec *iov; /* reusable kvec array for receives */
616 unsigned int nr_iov; /* number of kvecs in array */
617 char *smallbuf; /* pointer to current "small" buffer */
618 char *bigbuf; /* pointer to current "big" buffer */
619 unsigned int total_read; /* total amount of data read in this pass */
620 #ifdef CONFIG_CIFS_FSCACHE
621 struct fscache_cookie *fscache; /* client index cache cookie */
623 #ifdef CONFIG_CIFS_STATS2
624 atomic_t in_send; /* requests trying to send */
625 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
627 #ifdef CONFIG_CIFS_SMB2
628 unsigned int max_read;
629 unsigned int max_write;
630 struct delayed_work reconnect; /* reconnect workqueue job */
631 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
632 #endif /* CONFIG_CIFS_SMB2 */
635 static inline unsigned int
636 in_flight(struct TCP_Server_Info *server)
639 spin_lock(&server->req_lock);
640 num = server->in_flight;
641 spin_unlock(&server->req_lock);
646 has_credits(struct TCP_Server_Info *server, int *credits)
649 spin_lock(&server->req_lock);
651 spin_unlock(&server->req_lock);
656 add_credits(struct TCP_Server_Info *server, const unsigned int add,
659 server->ops->add_credits(server, add, optype);
663 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
667 server->ops->add_credits(server, add, optype);
668 wake_up(&server->request_q);
673 set_credits(struct TCP_Server_Info *server, const int val)
675 server->ops->set_credits(server, val);
679 get_next_mid64(struct TCP_Server_Info *server)
681 return cpu_to_le64(server->ops->get_next_mid(server));
685 get_next_mid(struct TCP_Server_Info *server)
687 __u16 mid = server->ops->get_next_mid(server);
689 * The value in the SMB header should be little endian for easy
690 * on-the-wire decoding.
692 return cpu_to_le16(mid);
696 get_mid(const struct smb_hdr *smb)
698 return le16_to_cpu(smb->Mid);
702 compare_mid(__u16 mid, const struct smb_hdr *smb)
704 return mid == le16_to_cpu(smb->Mid);
708 * When the server supports very large reads and writes via POSIX extensions,
709 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
710 * including the RFC1001 length.
712 * Note that this might make for "interesting" allocation problems during
713 * writeback however as we have to allocate an array of pointers for the
714 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
716 * For reads, there is a similar problem as we need to allocate an array
717 * of kvecs to handle the receive, though that should only need to be done
720 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
721 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
724 * When the server doesn't allow large posix writes, only allow a rsize/wsize
725 * of 2^17-1 minus the size of the call header. That allows for a read or
726 * write up to the maximum size described by RFC1002.
728 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
729 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
732 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
733 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
734 * a single wsize request with a single call.
736 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
739 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
740 * those values when posix extensions aren't in force. In actuality here, we
741 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
742 * to be ok with the extra byte even though Windows doesn't send writes that
747 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
749 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
750 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
753 * Macros to allow the TCP_Server_Info->net field and related code to drop out
754 * when CONFIG_NET_NS isn't set.
759 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
764 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
771 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
776 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
783 * Session structure. One of these for each uid session with a particular host
786 struct list_head smb_ses_list;
787 struct list_head tcon_list;
788 struct mutex session_mutex;
789 struct TCP_Server_Info *server; /* pointer to server info */
790 int ses_count; /* reference counter */
791 enum statusEnum status;
792 unsigned overrideSecFlg; /* if non-zero override global sec flags */
793 __u16 ipc_tid; /* special tid for connection to IPC share */
794 char *serverOS; /* name of operating system underlying server */
795 char *serverNOS; /* name of network operating system of server */
796 char *serverDomain; /* security realm of server */
797 __u64 Suid; /* remote smb uid */
798 kuid_t linux_uid; /* overriding owner of files on the mount */
799 kuid_t cred_uid; /* owner of credentials */
800 unsigned int capabilities;
801 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
802 TCP names - will ipv6 and sctp addresses fit? */
803 char *user_name; /* must not be null except during init of sess
804 and after mount option parsing we fill it */
807 struct session_key auth_key;
808 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
809 enum securityEnum sectype; /* what security flavor was specified? */
810 bool sign; /* is signing required? */
811 bool need_reconnect:1; /* connection reset, uid now invalid */
812 #ifdef CONFIG_CIFS_SMB2
814 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
815 #endif /* CONFIG_CIFS_SMB2 */
819 cap_unix(struct cifs_ses *ses)
821 return ses->server->vals->cap_unix & ses->capabilities;
825 * there is one of these for each connection to a resource on a particular
829 struct list_head tcon_list;
831 struct list_head rlist; /* reconnect list */
832 struct list_head openFileList;
833 spinlock_t open_file_lock; /* protects list above */
834 struct cifs_ses *ses; /* pointer to session associated with */
835 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
836 char *nativeFileSystem;
837 char *password; /* for share-level security */
838 __u32 tid; /* The 4 byte tree id */
839 __u16 Flags; /* optional support bits */
840 enum statusEnum tidStatus;
841 #ifdef CONFIG_CIFS_STATS
842 atomic_t num_smbs_sent;
847 atomic_t num_flushes;
848 atomic_t num_oplock_brks;
851 atomic_t num_deletes;
853 atomic_t num_posixopens;
854 atomic_t num_posixmkdirs;
856 atomic_t num_renames;
857 atomic_t num_t2renames;
861 atomic_t num_hardlinks;
862 atomic_t num_symlinks;
864 atomic_t num_acl_get;
865 atomic_t num_acl_set;
867 #ifdef CONFIG_CIFS_SMB2
869 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
870 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
872 #endif /* CONFIG_CIFS_SMB2 */
874 #ifdef CONFIG_CIFS_STATS2
875 unsigned long long time_writes;
876 unsigned long long time_reads;
877 unsigned long long time_opens;
878 unsigned long long time_deletes;
879 unsigned long long time_closes;
880 unsigned long long time_mkdirs;
881 unsigned long long time_rmdirs;
882 unsigned long long time_renames;
883 unsigned long long time_t2renames;
884 unsigned long long time_ffirst;
885 unsigned long long time_fnext;
886 unsigned long long time_fclose;
887 #endif /* CONFIG_CIFS_STATS2 */
890 spinlock_t stat_lock; /* protects the two fields above */
891 #endif /* CONFIG_CIFS_STATS */
892 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
893 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
894 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
895 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
898 bool seal:1; /* transport encryption for this mounted share */
899 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
900 for this mount even if server would support */
901 bool local_lease:1; /* check leases (only) on local system not remote */
902 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
903 bool broken_sparse_sup; /* if server or share does not support sparse */
904 bool need_reconnect:1; /* connection reset, tid now invalid */
905 bool use_resilient:1; /* use resilient instead of durable handles */
906 bool use_persistent:1; /* use persistent instead of durable handles */
907 #ifdef CONFIG_CIFS_SMB2
908 bool print:1; /* set if connection to printer share */
909 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
912 __u32 maximal_access;
913 __u32 vol_serial_number;
914 __le64 vol_create_time;
915 __u32 ss_flags; /* sector size flags */
916 __u32 perf_sector_size; /* best sector size for perf */
918 __u32 max_bytes_chunk;
919 __u32 max_bytes_copy;
920 #endif /* CONFIG_CIFS_SMB2 */
921 #ifdef CONFIG_CIFS_FSCACHE
922 u64 resource_id; /* server resource id */
923 struct fscache_cookie *fscache; /* cookie for share */
925 struct list_head pending_opens; /* list of incomplete opens */
926 /* BB add field for back pointer to sb struct(s)? */
930 * This is a refcounted and timestamped container for a tcon pointer. The
931 * container holds a tcon reference. It is considered safe to free one of
932 * these when the tl_count goes to 0. The tl_time is the time of the last
933 * "get" on the container.
936 struct rb_node tl_rbnode;
938 unsigned long tl_flags;
939 #define TCON_LINK_MASTER 0
940 #define TCON_LINK_PENDING 1
941 #define TCON_LINK_IN_TREE 2
942 unsigned long tl_time;
944 struct cifs_tcon *tl_tcon;
947 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
949 static inline struct cifs_tcon *
950 tlink_tcon(struct tcon_link *tlink)
952 return tlink->tl_tcon;
955 extern void cifs_put_tlink(struct tcon_link *tlink);
957 static inline struct tcon_link *
958 cifs_get_tlink(struct tcon_link *tlink)
960 if (tlink && !IS_ERR(tlink))
961 atomic_inc(&tlink->tl_count);
965 /* This function is always expected to succeed */
966 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
968 #define CIFS_OPLOCK_NO_CHANGE 0xfe
970 struct cifs_pending_open {
971 struct list_head olist;
972 struct tcon_link *tlink;
978 * This info hangs off the cifsFileInfo structure, pointed to by llist.
979 * This is used to track byte stream locks on the file
981 struct cifsLockInfo {
982 struct list_head llist; /* pointer to next cifsLockInfo */
983 struct list_head blist; /* pointer to locks blocked on this */
984 wait_queue_head_t block_q;
992 * One of these for each open instance of a file
994 struct cifs_search_info {
995 loff_t index_of_last_entry;
996 __u16 entries_in_buffer;
999 char *ntwrk_buf_start;
1000 char *srch_entries_start;
1002 const char *presume_name;
1003 unsigned int resume_name_len;
1007 bool smallBuf:1; /* so we know which buf_release function to call */
1010 struct cifs_open_parms {
1011 struct cifs_tcon *tcon;
1012 struct cifs_sb_info *cifs_sb;
1017 struct cifs_fid *fid;
1023 #ifdef CONFIG_CIFS_SMB2
1024 __u64 persistent_fid; /* persist file id for smb2 */
1025 __u64 volatile_fid; /* volatile file id for smb2 */
1026 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1027 __u8 create_guid[16];
1029 struct cifs_pending_open *pending_open;
1034 struct cifs_fid_locks {
1035 struct list_head llist;
1036 struct cifsFileInfo *cfile; /* fid that owns locks */
1037 struct list_head locks; /* locks held by fid above */
1040 struct cifsFileInfo {
1041 /* following two lists are protected by tcon->open_file_lock */
1042 struct list_head tlist; /* pointer to next fid owned by tcon */
1043 struct list_head flist; /* next fid (file instance) for this inode */
1044 /* lock list below protected by cifsi->lock_sem */
1045 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1046 kuid_t uid; /* allows finding which FileInfo structure */
1047 __u32 pid; /* process id who opened file */
1048 struct cifs_fid fid; /* file id from remote */
1049 /* BB add lock scope info here if needed */ ;
1050 /* lock scope id (0 if none) */
1051 struct dentry *dentry;
1052 struct tcon_link *tlink;
1053 unsigned int f_flags;
1054 bool invalidHandle:1; /* file closed via session abend */
1055 bool oplock_break_cancelled:1;
1057 spinlock_t file_info_lock; /* protects four flag/count fields above */
1058 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1059 struct cifs_search_info srch_inf;
1060 struct work_struct oplock_break; /* work for oplock breaks */
1063 struct cifs_io_parms {
1065 #ifdef CONFIG_CIFS_SMB2
1066 __u64 persistent_fid; /* persist file id for smb2 */
1067 __u64 volatile_fid; /* volatile file id for smb2 */
1071 unsigned int length;
1072 struct cifs_tcon *tcon;
1075 struct cifs_readdata;
1077 /* asynchronous read support */
1078 struct cifs_readdata {
1079 struct kref refcount;
1080 struct list_head list;
1081 struct completion done;
1082 struct cifsFileInfo *cfile;
1083 struct address_space *mapping;
1086 unsigned int got_bytes;
1089 struct work_struct work;
1090 int (*read_into_pages)(struct TCP_Server_Info *server,
1091 struct cifs_readdata *rdata,
1094 unsigned int pagesz;
1095 unsigned int tailsz;
1096 unsigned int credits;
1097 unsigned int nr_pages;
1098 struct page *pages[];
1101 struct cifs_writedata;
1103 /* asynchronous write support */
1104 struct cifs_writedata {
1105 struct kref refcount;
1106 struct list_head list;
1107 struct completion done;
1108 enum writeback_sync_modes sync_mode;
1109 struct work_struct work;
1110 struct cifsFileInfo *cfile;
1115 unsigned int pagesz;
1116 unsigned int tailsz;
1117 unsigned int credits;
1118 unsigned int nr_pages;
1119 struct page *pages[];
1123 * Take a reference on the file private data. Must be called with
1124 * cfile->file_info_lock held.
1127 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1132 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1133 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1135 #define CIFS_CACHE_READ_FLG 1
1136 #define CIFS_CACHE_HANDLE_FLG 2
1137 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1138 #define CIFS_CACHE_WRITE_FLG 4
1139 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1140 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1142 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1143 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1144 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1147 * One of these for each file inode
1150 struct cifsInodeInfo {
1151 bool can_cache_brlcks;
1152 struct list_head llist; /* locks helb by this inode */
1153 struct rw_semaphore lock_sem; /* protect the fields above */
1154 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1155 struct list_head openFileList;
1156 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1157 unsigned int oplock; /* oplock/lease level we have */
1158 unsigned int epoch; /* used to track lease state changes */
1159 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1160 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1161 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1162 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1163 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1164 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1165 unsigned long flags;
1166 spinlock_t writers_lock;
1167 unsigned int writers; /* Number of writers on this inode */
1168 unsigned long time; /* jiffies of last update of inode */
1169 u64 server_eof; /* current file size on server -- protected by i_lock */
1170 u64 uniqueid; /* server inode number */
1171 u64 createtime; /* creation time on server */
1172 #ifdef CONFIG_CIFS_SMB2
1173 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1175 #ifdef CONFIG_CIFS_FSCACHE
1176 struct fscache_cookie *fscache;
1178 struct inode vfs_inode;
1181 static inline struct cifsInodeInfo *
1182 CIFS_I(struct inode *inode)
1184 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1187 static inline struct cifs_sb_info *
1188 CIFS_SB(struct super_block *sb)
1190 return sb->s_fs_info;
1193 static inline struct cifs_sb_info *
1194 CIFS_FILE_SB(struct file *file)
1196 return CIFS_SB(file_inode(file)->i_sb);
1199 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1201 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1208 convert_delimiter(char *path, char delim)
1210 char old_delim, *pos;
1218 while ((pos = strchr(pos, old_delim)))
1222 #ifdef CONFIG_CIFS_STATS
1223 #define cifs_stats_inc atomic_inc
1225 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1229 spin_lock(&tcon->stat_lock);
1230 tcon->bytes_written += bytes;
1231 spin_unlock(&tcon->stat_lock);
1235 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1238 spin_lock(&tcon->stat_lock);
1239 tcon->bytes_read += bytes;
1240 spin_unlock(&tcon->stat_lock);
1244 #define cifs_stats_inc(field) do {} while (0)
1245 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1246 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1252 * This is the prototype for the mid receive function. This function is for
1253 * receiving the rest of the SMB frame, starting with the WordCount (which is
1254 * just after the MID in struct smb_hdr). Note:
1256 * - This will be called by cifsd, with no locks held.
1257 * - The mid will still be on the pending_mid_q.
1258 * - mid->resp_buf will point to the current buffer.
1260 * Returns zero on a successful receive, or an error. The receive state in
1261 * the TCP_Server_Info will also be updated.
1263 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1264 struct mid_q_entry *mid);
1267 * This is the prototype for the mid callback function. This is called once the
1268 * mid has been received off of the socket. When creating one, take special
1269 * care to avoid deadlocks. Things to bear in mind:
1271 * - it will be called by cifsd, with no locks held
1272 * - the mid will be removed from any lists
1274 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1276 /* one of these for every pending CIFS request to the server */
1277 struct mid_q_entry {
1278 struct list_head qhead; /* mids waiting on reply from this server */
1279 struct TCP_Server_Info *server; /* server corresponding to this mid */
1280 __u64 mid; /* multiplex id */
1281 __u32 pid; /* process id */
1282 __u32 sequence_number; /* for CIFS signing */
1283 unsigned long when_alloc; /* when mid was created */
1284 #ifdef CONFIG_CIFS_STATS2
1285 unsigned long when_sent; /* time when smb send finished */
1286 unsigned long when_received; /* when demux complete (taken off wire) */
1288 mid_receive_t *receive; /* call receive callback */
1289 mid_callback_t *callback; /* call completion callback */
1290 void *callback_data; /* general purpose pointer for callback */
1291 void *resp_buf; /* pointer to received SMB header */
1292 int mid_state; /* wish this were enum but can not pass to wait_event */
1293 __le16 command; /* smb command code */
1294 bool large_buf:1; /* if valid response, is pointer to large buf */
1295 bool multiRsp:1; /* multiple trans2 responses for one request */
1296 bool multiEnd:1; /* both received */
1299 /* Make code in transport.c a little cleaner by moving
1300 update of optional stats into function below */
1301 #ifdef CONFIG_CIFS_STATS2
1303 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1305 atomic_inc(&server->in_send);
1308 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1310 atomic_dec(&server->in_send);
1313 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1315 atomic_inc(&server->num_waiters);
1318 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1320 atomic_dec(&server->num_waiters);
1323 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1325 mid->when_sent = jiffies;
1328 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1331 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1335 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1339 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1343 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1348 /* for pending dnotify requests */
1349 struct dir_notify_req {
1350 struct list_head lhead;
1357 __u32 filter; /* CompletionFilter (for multishot) */
1362 struct dfs_info3_param {
1363 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1372 * common struct for holding inode info when searching for or updating an
1373 * inode with new info
1376 #define CIFS_FATTR_DFS_REFERRAL 0x1
1377 #define CIFS_FATTR_DELETE_PENDING 0x2
1378 #define CIFS_FATTR_NEED_REVAL 0x4
1379 #define CIFS_FATTR_INO_COLLISION 0x8
1380 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1393 unsigned int cf_nlink;
1394 unsigned int cf_dtype;
1395 struct timespec cf_atime;
1396 struct timespec cf_mtime;
1397 struct timespec cf_ctime;
1400 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1403 kfree(param->path_name);
1404 kfree(param->node_name);
1409 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1410 int number_of_items)
1413 if ((number_of_items == 0) || (param == NULL))
1415 for (i = 0; i < number_of_items; i++) {
1416 kfree(param[i].path_name);
1417 kfree(param[i].node_name);
1423 #define MID_REQUEST_ALLOCATED 1
1424 #define MID_REQUEST_SUBMITTED 2
1425 #define MID_RESPONSE_RECEIVED 4
1426 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1427 #define MID_RESPONSE_MALFORMED 0x10
1428 #define MID_SHUTDOWN 0x20
1430 /* Types of response buffer returned from SendReceive2 */
1431 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1432 #define CIFS_SMALL_BUFFER 1
1433 #define CIFS_LARGE_BUFFER 2
1434 #define CIFS_IOVEC 4 /* array of response buffers */
1436 /* Type of Request to SendReceive2 */
1437 #define CIFS_BLOCKING_OP 1 /* operation can block */
1438 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1439 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1440 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1441 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1442 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1444 /* Type of request operation */
1445 #define CIFS_ECHO_OP 0x080 /* echo request */
1446 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1447 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1448 #define CIFS_OP_MASK 0x0380 /* mask request type */
1449 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1451 /* Security Flags: indicate type of session setup needed */
1452 #define CIFSSEC_MAY_SIGN 0x00001
1453 #define CIFSSEC_MAY_NTLM 0x00002
1454 #define CIFSSEC_MAY_NTLMV2 0x00004
1455 #define CIFSSEC_MAY_KRB5 0x00008
1456 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1457 #define CIFSSEC_MAY_LANMAN 0x00010
1458 #define CIFSSEC_MAY_PLNTXT 0x00020
1460 #define CIFSSEC_MAY_LANMAN 0
1461 #define CIFSSEC_MAY_PLNTXT 0
1462 #endif /* weak passwords */
1463 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1464 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1466 #define CIFSSEC_MUST_SIGN 0x01001
1467 /* note that only one of the following can be set so the
1468 result of setting MUST flags more than once will be to
1469 require use of the stronger protocol */
1470 #define CIFSSEC_MUST_NTLM 0x02002
1471 #define CIFSSEC_MUST_NTLMV2 0x04004
1472 #define CIFSSEC_MUST_KRB5 0x08008
1473 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1474 #define CIFSSEC_MUST_LANMAN 0x10010
1475 #define CIFSSEC_MUST_PLNTXT 0x20020
1476 #ifdef CONFIG_CIFS_UPCALL
1477 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1479 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1481 #else /* do not allow weak pw hash */
1482 #define CIFSSEC_MUST_LANMAN 0
1483 #define CIFSSEC_MUST_PLNTXT 0
1484 #ifdef CONFIG_CIFS_UPCALL
1485 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1487 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1489 #endif /* WEAK_PW_HASH */
1490 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1491 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1493 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1494 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1495 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1497 *****************************************************************
1498 * All constants go here
1499 *****************************************************************
1502 #define UID_HASH (16)
1505 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1506 * following to be declared.
1509 /****************************************************************************
1510 * Locking notes. All updates to global variables and lists should be
1511 * protected by spinlocks or semaphores.
1515 * GlobalMid_Lock protects:
1516 * list operations on pending_mid_q and oplockQ
1517 * updates to XID counters, multiplex id and SMB sequence numbers
1518 * tcp_ses_lock protects:
1519 * list operations on tcp and SMB session lists
1520 * tcon->open_file_lock protects the list of open files hanging off the tcon
1521 * cfile->file_info_lock protects counters and fields in cifs file struct
1522 * f_owner.lock protects certain per file struct operations
1523 * mapping->page_lock protects certain per page operations
1527 * sesSem operations on smb session
1528 * tconSem operations on tree connection
1529 * fh_sem file handle reconnection operations
1531 ****************************************************************************/
1533 #ifdef DECLARE_GLOBALS_HERE
1534 #define GLOBAL_EXTERN
1536 #define GLOBAL_EXTERN extern
1540 * the list of TCP_Server_Info structures, ie each of the sockets
1541 * connecting our client to a distinct server (ip address), is
1542 * chained together by cifs_tcp_ses_list. The list of all our SMB
1543 * sessions (and from that the tree connections) can be found
1544 * by iterating over cifs_tcp_ses_list
1546 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1549 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1550 * tcp session, and the list of tcon's per smb session. It also protects
1551 * the reference counters for the server, smb session, and tcon. Finally,
1552 * changes to the tcon->tidStatus should be done while holding this lock.
1553 * generally the locks should be taken in order tcp_ses_lock before
1554 * tcon->open_file_lock and that before file->file_info_lock since the
1555 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1557 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1559 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1560 /* Outstanding dir notify requests */
1561 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1562 /* DirNotify response queue */
1563 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1564 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1567 * Global transaction id (XID) information
1569 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1570 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1571 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1572 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1573 /* on midQ entries */
1575 * Global counters, updated atomically
1577 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1578 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1579 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1580 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1581 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1583 /* Various Debug counters */
1584 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1585 #ifdef CONFIG_CIFS_STATS2
1586 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1587 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1589 GLOBAL_EXTERN atomic_t smBufAllocCount;
1590 GLOBAL_EXTERN atomic_t midCount;
1593 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1594 GLOBAL_EXTERN bool lookupCacheEnabled;
1595 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1596 with more secure ntlmssp2 challenge/resp */
1597 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1598 GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1599 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1600 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1601 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1602 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1604 #ifdef CONFIG_CIFS_ACL
1605 GLOBAL_EXTERN struct rb_root uidtree;
1606 GLOBAL_EXTERN struct rb_root gidtree;
1607 GLOBAL_EXTERN spinlock_t siduidlock;
1608 GLOBAL_EXTERN spinlock_t sidgidlock;
1609 GLOBAL_EXTERN struct rb_root siduidtree;
1610 GLOBAL_EXTERN struct rb_root sidgidtree;
1611 GLOBAL_EXTERN spinlock_t uidsidlock;
1612 GLOBAL_EXTERN spinlock_t gidsidlock;
1613 #endif /* CONFIG_CIFS_ACL */
1615 void cifs_oplock_break(struct work_struct *work);
1617 extern const struct slow_work_ops cifs_oplock_break_ops;
1618 extern struct workqueue_struct *cifsiod_wq;
1620 extern mempool_t *cifs_mid_poolp;
1622 /* Operations for different SMB versions */
1623 #define SMB1_VERSION_STRING "1.0"
1624 extern struct smb_version_operations smb1_operations;
1625 extern struct smb_version_values smb1_values;
1626 #define SMB20_VERSION_STRING "2.0"
1627 extern struct smb_version_operations smb20_operations;
1628 extern struct smb_version_values smb20_values;
1629 #define SMB21_VERSION_STRING "2.1"
1630 extern struct smb_version_operations smb21_operations;
1631 extern struct smb_version_values smb21_values;
1632 #define SMB30_VERSION_STRING "3.0"
1633 extern struct smb_version_operations smb30_operations;
1634 extern struct smb_version_values smb30_values;
1635 #define SMB302_VERSION_STRING "3.02"
1636 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1637 extern struct smb_version_values smb302_values;
1638 #define SMB311_VERSION_STRING "3.1.1"
1639 #define ALT_SMB311_VERSION_STRING "3.11"
1640 extern struct smb_version_operations smb311_operations;
1641 extern struct smb_version_values smb311_values;
1642 #endif /* _CIFS_GLOB_H */