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 void (*downgrade_oplock)(struct TCP_Server_Info *,
232 struct cifsInodeInfo *, bool);
233 /* process transaction2 response */
234 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
236 /* check if we need to negotiate */
237 bool (*need_neg)(struct TCP_Server_Info *);
238 /* negotiate to the server */
239 int (*negotiate)(const unsigned int, struct cifs_ses *);
240 /* set negotiated write size */
241 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
242 /* set negotiated read size */
243 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
244 /* setup smb sessionn */
245 int (*sess_setup)(const unsigned int, struct cifs_ses *,
246 const struct nls_table *);
247 /* close smb session */
248 int (*logoff)(const unsigned int, struct cifs_ses *);
249 /* connect to a server share */
250 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
251 struct cifs_tcon *, const struct nls_table *);
252 /* close tree connecion */
253 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
254 /* get DFS referrals */
255 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
256 const char *, struct dfs_info3_param **,
257 unsigned int *, const struct nls_table *, int);
258 /* informational QFS call */
259 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
260 /* check if a path is accessible or not */
261 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
262 struct cifs_sb_info *, const char *);
263 /* query path data from the server */
264 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
265 struct cifs_sb_info *, const char *,
266 FILE_ALL_INFO *, bool *, bool *);
267 /* query file data from the server */
268 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
269 struct cifs_fid *, FILE_ALL_INFO *);
270 /* get server index number */
271 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
272 struct cifs_sb_info *, const char *,
273 u64 *uniqueid, FILE_ALL_INFO *);
274 /* set size by path */
275 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
276 const char *, __u64, struct cifs_sb_info *, bool);
277 /* set size by file handle */
278 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
279 struct cifsFileInfo *, __u64, bool);
281 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
283 int (*set_compression)(const unsigned int, struct cifs_tcon *,
284 struct cifsFileInfo *);
285 /* check if we can send an echo or nor */
286 bool (*can_echo)(struct TCP_Server_Info *);
287 /* send echo request */
288 int (*echo)(struct TCP_Server_Info *);
289 /* create directory */
290 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
291 struct cifs_sb_info *);
292 /* set info on created directory */
293 void (*mkdir_setinfo)(struct inode *, const char *,
294 struct cifs_sb_info *, struct cifs_tcon *,
296 /* remove directory */
297 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
298 struct cifs_sb_info *);
300 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
301 struct cifs_sb_info *);
302 /* open, rename and delete file */
303 int (*rename_pending_delete)(const char *, struct dentry *,
305 /* send rename request */
306 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
307 const char *, struct cifs_sb_info *);
308 /* send create hardlink request */
309 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
310 const char *, const char *,
311 struct cifs_sb_info *);
312 /* query symlink target */
313 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
314 const char *, char **, struct cifs_sb_info *);
315 /* open a file for non-posix mounts */
316 int (*open)(const unsigned int, struct cifs_open_parms *,
317 __u32 *, FILE_ALL_INFO *);
318 /* set fid protocol-specific info */
319 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
321 void (*close)(const unsigned int, struct cifs_tcon *,
323 /* send a flush request to the server */
324 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
325 /* async read from the server */
326 int (*async_readv)(struct cifs_readdata *);
327 /* async write to the server */
328 int (*async_writev)(struct cifs_writedata *,
329 void (*release)(struct kref *));
330 /* sync read from the server */
331 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
332 struct cifs_io_parms *, unsigned int *, char **,
334 /* sync write to the server */
335 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
336 struct cifs_io_parms *, unsigned int *, struct kvec *,
338 /* open dir, start readdir */
339 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
340 const char *, struct cifs_sb_info *,
341 struct cifs_fid *, __u16,
342 struct cifs_search_info *);
343 /* continue readdir */
344 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
346 __u16, struct cifs_search_info *srch_inf);
348 int (*close_dir)(const unsigned int, struct cifs_tcon *,
350 /* calculate a size of SMB message */
351 unsigned int (*calc_smb_size)(void *);
352 /* check for STATUS_PENDING and process it in a positive case */
353 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
354 /* send oplock break response */
355 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
356 struct cifsInodeInfo *);
357 /* query remote filesystem */
358 int (*queryfs)(const unsigned int, struct cifs_tcon *,
360 /* send mandatory brlock to the server */
361 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
362 __u64, __u32, int, int, bool);
363 /* unlock range of mandatory locks */
364 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
366 /* push brlocks from the cache to the server */
367 int (*push_mand_locks)(struct cifsFileInfo *);
368 /* get lease key of the inode */
369 void (*get_lease_key)(struct inode *, struct cifs_fid *);
370 /* set lease key of the inode */
371 void (*set_lease_key)(struct inode *, struct cifs_fid *);
372 /* generate new lease key */
373 void (*new_lease_key)(struct cifs_fid *);
374 int (*generate_signingkey)(struct cifs_ses *);
375 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
376 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
377 struct cifs_sb_info *, const unsigned char *,
378 char *, unsigned int *);
379 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
380 struct cifs_sb_info *, const unsigned char *,
381 char *, unsigned int *);
382 /* if we can do cache read operations */
383 bool (*is_read_op)(__u32);
384 /* set oplock level for the inode */
385 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
387 /* create lease context buffer for CREATE request */
388 char * (*create_lease_buf)(u8 *, u8);
389 /* parse lease context buffer and return oplock/epoch info */
390 __u8 (*parse_lease_buf)(void *, unsigned int *);
391 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
392 struct cifsFileInfo *target_file, u64 src_off, u64 len,
394 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
395 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
396 const unsigned char *, const unsigned char *, char *,
397 size_t, const struct nls_table *, int);
398 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
399 const char *, const void *, const __u16,
400 const struct nls_table *, int);
401 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
402 const char *, u32 *);
403 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
404 const struct cifs_fid *, u32 *);
405 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
407 /* writepages retry size */
408 unsigned int (*wp_retry_size)(struct inode *);
409 /* get mtu credits */
410 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
411 unsigned int *, unsigned int *);
412 /* check if we need to issue closedir */
413 bool (*dir_needs_close)(struct cifsFileInfo *);
414 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
418 struct smb_version_values {
419 char *version_string;
421 __u32 req_capabilities;
422 __u32 large_lock_type;
423 __u32 exclusive_lock_type;
424 __u32 shared_lock_type;
425 __u32 unlock_lock_type;
427 size_t max_header_size;
428 size_t read_rsp_size;
430 unsigned int cap_unix;
431 unsigned int cap_nt_find;
432 unsigned int cap_large_files;
433 __u16 signing_enabled;
434 __u16 signing_required;
435 size_t create_lease_size;
438 #define HEADER_SIZE(server) (server->vals->header_size)
439 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
446 char *iocharset; /* local code page for mapping to and from Unicode */
447 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
448 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
456 enum securityEnum sectype; /* sectype requested via mnt opts */
457 bool sign; /* was signing requested via mnt opts? */
465 bool no_psx_acl:1; /* set if posix acl support should be disabled */
467 bool backupuid_specified; /* mount option backupuid is specified */
468 bool backupgid_specified; /* mount option backupgid is specified */
469 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
470 bool server_ino:1; /* use inode numbers from server ie UniqueId */
472 bool strict_io:1; /* strict cache behavior */
473 bool remap:1; /* set to remap seven reserved chars in filenames */
474 bool posix_paths:1; /* unset to not ask for posix pathnames. */
477 bool nullauth:1; /* attempt to authenticate with null user */
478 bool nocase:1; /* request case insensitive filenames */
479 bool nobrl:1; /* disable sending byte range locks to srv */
480 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
481 bool seal:1; /* request transport encryption on share */
482 bool nodfs:1; /* Do not request DFS, even if available */
483 bool local_lease:1; /* check leases only on local system, not remote */
486 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
487 bool fsc:1; /* enable fscache */
488 bool mfsymlinks:1; /* use Minshall+French Symlinks */
490 bool rwpidforward:1; /* pid forward for read/write operations */
494 bool sockopt_tcp_nodelay:1;
495 unsigned long actimeo; /* attribute cache timeout (jiffies) */
496 struct smb_version_operations *ops;
497 struct smb_version_values *vals;
499 struct sockaddr_storage dstaddr; /* destination address */
500 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
501 struct nls_table *local_nls;
504 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
505 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
506 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
507 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
508 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
509 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
510 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
511 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
512 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
513 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
515 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
516 MS_NODEV | MS_SYNCHRONOUS)
518 struct cifs_mnt_data {
519 struct cifs_sb_info *cifs_sb;
524 static inline unsigned int
525 get_rfc1002_length(void *buf)
527 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
531 inc_rfc1001_len(void *buf, int count)
533 be32_add_cpu((__be32 *)buf, count);
536 struct TCP_Server_Info {
537 struct list_head tcp_ses_list;
538 struct list_head smb_ses_list;
539 int srv_count; /* reference counter */
540 /* 15 character server name + 0x20 16th byte indicating type = srv */
541 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
542 struct smb_version_operations *ops;
543 struct smb_version_values *vals;
544 enum statusEnum tcpStatus; /* what we think the status is */
545 char *hostname; /* hostname portion of UNC string */
546 struct socket *ssocket;
547 struct sockaddr_storage dstaddr;
548 struct sockaddr_storage srcaddr; /* locally bind to this IP */
552 wait_queue_head_t response_q;
553 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
554 struct list_head pending_mid_q;
555 bool noblocksnd; /* use blocking sendmsg */
556 bool noautotune; /* do not autotune send buf sizes */
558 int credits; /* send no more requests at once */
559 unsigned int in_flight; /* number of requests on the wire to server */
560 spinlock_t req_lock; /* protect the two values above */
561 struct mutex srv_mutex;
562 struct task_struct *tsk;
563 char server_GUID[16];
565 bool sign; /* is signing enabled on this connection? */
566 bool session_estab; /* mark when very first sess is established */
567 #ifdef CONFIG_CIFS_SMB2
568 int echo_credits; /* echo reserved slots */
569 int oplock_credits; /* oplock break reserved slots */
570 bool echoes:1; /* enable echoes */
571 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
573 u16 dialect; /* dialect index that server chose */
574 bool oplocks:1; /* enable oplocks */
575 unsigned int maxReq; /* Clients should submit no more */
576 /* than maxReq distinct unanswered SMBs to the server when using */
577 /* multiplexed reads or writes */
578 unsigned int maxBuf; /* maxBuf specifies the maximum */
579 /* message size the server can send or receive for non-raw SMBs */
580 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
581 /* when socket is setup (and during reconnect) before NegProt sent */
582 unsigned int max_rw; /* maxRw specifies the maximum */
583 /* message size the server can send or receive for */
584 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
585 unsigned int capabilities; /* selective disabling of caps by smb sess */
586 int timeAdj; /* Adjust for difference in server time zone in sec */
587 __u64 CurrentMid; /* multiplex id - rotating counter */
588 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
589 /* 16th byte of RFC1001 workstation name is always null */
590 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
591 __u32 sequence_number; /* for signing, protected by srv_mutex */
592 struct session_key session_key;
593 unsigned long lstrp; /* when we got last response from this server */
594 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
595 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
596 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
597 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
598 char negflavor; /* NEGOTIATE response flavor */
599 /* extended security flavors that server supports */
600 bool sec_ntlmssp; /* supports NTLMSSP */
601 bool sec_kerberosu2u; /* supports U2U Kerberos */
602 bool sec_kerberos; /* supports plain Kerberos */
603 bool sec_mskerberos; /* supports legacy MS Kerberos */
604 bool large_buf; /* is current buffer large? */
605 struct delayed_work echo; /* echo ping workqueue job */
606 struct kvec *iov; /* reusable kvec array for receives */
607 unsigned int nr_iov; /* number of kvecs in array */
608 char *smallbuf; /* pointer to current "small" buffer */
609 char *bigbuf; /* pointer to current "big" buffer */
610 unsigned int total_read; /* total amount of data read in this pass */
611 #ifdef CONFIG_CIFS_FSCACHE
612 struct fscache_cookie *fscache; /* client index cache cookie */
614 #ifdef CONFIG_CIFS_STATS2
615 atomic_t in_send; /* requests trying to send */
616 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
618 #ifdef CONFIG_CIFS_SMB2
619 unsigned int max_read;
620 unsigned int max_write;
621 #endif /* CONFIG_CIFS_SMB2 */
624 static inline unsigned int
625 in_flight(struct TCP_Server_Info *server)
628 spin_lock(&server->req_lock);
629 num = server->in_flight;
630 spin_unlock(&server->req_lock);
635 has_credits(struct TCP_Server_Info *server, int *credits)
638 spin_lock(&server->req_lock);
640 spin_unlock(&server->req_lock);
645 add_credits(struct TCP_Server_Info *server, const unsigned int add,
648 server->ops->add_credits(server, add, optype);
652 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
656 server->ops->add_credits(server, add, optype);
657 wake_up(&server->request_q);
662 set_credits(struct TCP_Server_Info *server, const int val)
664 server->ops->set_credits(server, val);
668 get_next_mid64(struct TCP_Server_Info *server)
670 return server->ops->get_next_mid(server);
674 get_next_mid(struct TCP_Server_Info *server)
676 __u16 mid = get_next_mid64(server);
678 * The value in the SMB header should be little endian for easy
679 * on-the-wire decoding.
681 return cpu_to_le16(mid);
685 get_mid(const struct smb_hdr *smb)
687 return le16_to_cpu(smb->Mid);
691 compare_mid(__u16 mid, const struct smb_hdr *smb)
693 return mid == le16_to_cpu(smb->Mid);
697 * When the server supports very large reads and writes via POSIX extensions,
698 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
699 * including the RFC1001 length.
701 * Note that this might make for "interesting" allocation problems during
702 * writeback however as we have to allocate an array of pointers for the
703 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
705 * For reads, there is a similar problem as we need to allocate an array
706 * of kvecs to handle the receive, though that should only need to be done
709 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
710 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
713 * When the server doesn't allow large posix writes, only allow a rsize/wsize
714 * of 2^17-1 minus the size of the call header. That allows for a read or
715 * write up to the maximum size described by RFC1002.
717 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
718 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
721 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
722 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
723 * a single wsize request with a single call.
725 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
728 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
729 * those values when posix extensions aren't in force. In actuality here, we
730 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
731 * to be ok with the extra byte even though Windows doesn't send writes that
736 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
738 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
739 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
742 * Macros to allow the TCP_Server_Info->net field and related code to drop out
743 * when CONFIG_NET_NS isn't set.
748 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
753 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
760 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
765 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
772 * Session structure. One of these for each uid session with a particular host
775 struct list_head smb_ses_list;
776 struct list_head tcon_list;
777 struct mutex session_mutex;
778 struct TCP_Server_Info *server; /* pointer to server info */
779 int ses_count; /* reference counter */
780 enum statusEnum status;
781 unsigned overrideSecFlg; /* if non-zero override global sec flags */
782 __u16 ipc_tid; /* special tid for connection to IPC share */
783 char *serverOS; /* name of operating system underlying server */
784 char *serverNOS; /* name of network operating system of server */
785 char *serverDomain; /* security realm of server */
786 __u64 Suid; /* remote smb uid */
787 kuid_t linux_uid; /* overriding owner of files on the mount */
788 kuid_t cred_uid; /* owner of credentials */
789 unsigned int capabilities;
790 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
791 TCP names - will ipv6 and sctp addresses fit? */
792 char *user_name; /* must not be null except during init of sess
793 and after mount option parsing we fill it */
796 struct session_key auth_key;
797 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
798 enum securityEnum sectype; /* what security flavor was specified? */
799 bool sign; /* is signing required? */
800 bool need_reconnect:1; /* connection reset, uid now invalid */
801 #ifdef CONFIG_CIFS_SMB2
803 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
804 #endif /* CONFIG_CIFS_SMB2 */
808 cap_unix(struct cifs_ses *ses)
810 return ses->server->vals->cap_unix & ses->capabilities;
814 * there is one of these for each connection to a resource on a particular
818 struct list_head tcon_list;
820 struct list_head openFileList;
821 struct cifs_ses *ses; /* pointer to session associated with */
822 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
823 char *nativeFileSystem;
824 char *password; /* for share-level security */
825 __u32 tid; /* The 4 byte tree id */
826 __u16 Flags; /* optional support bits */
827 enum statusEnum tidStatus;
828 #ifdef CONFIG_CIFS_STATS
829 atomic_t num_smbs_sent;
834 atomic_t num_flushes;
835 atomic_t num_oplock_brks;
838 atomic_t num_deletes;
840 atomic_t num_posixopens;
841 atomic_t num_posixmkdirs;
843 atomic_t num_renames;
844 atomic_t num_t2renames;
848 atomic_t num_hardlinks;
849 atomic_t num_symlinks;
851 atomic_t num_acl_get;
852 atomic_t num_acl_set;
854 #ifdef CONFIG_CIFS_SMB2
856 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
857 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
859 #endif /* CONFIG_CIFS_SMB2 */
861 #ifdef CONFIG_CIFS_STATS2
862 unsigned long long time_writes;
863 unsigned long long time_reads;
864 unsigned long long time_opens;
865 unsigned long long time_deletes;
866 unsigned long long time_closes;
867 unsigned long long time_mkdirs;
868 unsigned long long time_rmdirs;
869 unsigned long long time_renames;
870 unsigned long long time_t2renames;
871 unsigned long long time_ffirst;
872 unsigned long long time_fnext;
873 unsigned long long time_fclose;
874 #endif /* CONFIG_CIFS_STATS2 */
877 spinlock_t stat_lock;
878 #endif /* CONFIG_CIFS_STATS */
879 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
880 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
881 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
882 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
885 bool seal:1; /* transport encryption for this mounted share */
886 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
887 for this mount even if server would support */
888 bool local_lease:1; /* check leases (only) on local system not remote */
889 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
890 bool broken_sparse_sup; /* if server or share does not support sparse */
891 bool need_reconnect:1; /* connection reset, tid now invalid */
892 #ifdef CONFIG_CIFS_SMB2
893 bool print:1; /* set if connection to printer share */
894 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
897 __u32 maximal_access;
898 __u32 vol_serial_number;
899 __le64 vol_create_time;
900 __u32 ss_flags; /* sector size flags */
901 __u32 perf_sector_size; /* best sector size for perf */
903 __u32 max_bytes_chunk;
904 __u32 max_bytes_copy;
905 #endif /* CONFIG_CIFS_SMB2 */
906 #ifdef CONFIG_CIFS_FSCACHE
907 u64 resource_id; /* server resource id */
908 struct fscache_cookie *fscache; /* cookie for share */
910 struct list_head pending_opens; /* list of incomplete opens */
911 /* BB add field for back pointer to sb struct(s)? */
915 * This is a refcounted and timestamped container for a tcon pointer. The
916 * container holds a tcon reference. It is considered safe to free one of
917 * these when the tl_count goes to 0. The tl_time is the time of the last
918 * "get" on the container.
921 struct rb_node tl_rbnode;
923 unsigned long tl_flags;
924 #define TCON_LINK_MASTER 0
925 #define TCON_LINK_PENDING 1
926 #define TCON_LINK_IN_TREE 2
927 unsigned long tl_time;
929 struct cifs_tcon *tl_tcon;
932 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
934 static inline struct cifs_tcon *
935 tlink_tcon(struct tcon_link *tlink)
937 return tlink->tl_tcon;
940 extern void cifs_put_tlink(struct tcon_link *tlink);
942 static inline struct tcon_link *
943 cifs_get_tlink(struct tcon_link *tlink)
945 if (tlink && !IS_ERR(tlink))
946 atomic_inc(&tlink->tl_count);
950 /* This function is always expected to succeed */
951 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
953 #define CIFS_OPLOCK_NO_CHANGE 0xfe
955 struct cifs_pending_open {
956 struct list_head olist;
957 struct tcon_link *tlink;
963 * This info hangs off the cifsFileInfo structure, pointed to by llist.
964 * This is used to track byte stream locks on the file
966 struct cifsLockInfo {
967 struct list_head llist; /* pointer to next cifsLockInfo */
968 struct list_head blist; /* pointer to locks blocked on this */
969 wait_queue_head_t block_q;
977 * One of these for each open instance of a file
979 struct cifs_search_info {
980 loff_t index_of_last_entry;
981 __u16 entries_in_buffer;
984 char *ntwrk_buf_start;
985 char *srch_entries_start;
987 const char *presume_name;
988 unsigned int resume_name_len;
992 bool smallBuf:1; /* so we know which buf_release function to call */
995 struct cifs_open_parms {
996 struct cifs_tcon *tcon;
997 struct cifs_sb_info *cifs_sb;
1002 struct cifs_fid *fid;
1008 #ifdef CONFIG_CIFS_SMB2
1009 __u64 persistent_fid; /* persist file id for smb2 */
1010 __u64 volatile_fid; /* volatile file id for smb2 */
1011 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1013 struct cifs_pending_open *pending_open;
1018 struct cifs_fid_locks {
1019 struct list_head llist;
1020 struct cifsFileInfo *cfile; /* fid that owns locks */
1021 struct list_head locks; /* locks held by fid above */
1024 struct cifsFileInfo {
1025 struct list_head tlist; /* pointer to next fid owned by tcon */
1026 struct list_head flist; /* next fid (file instance) for this inode */
1027 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1028 kuid_t uid; /* allows finding which FileInfo structure */
1029 __u32 pid; /* process id who opened file */
1030 struct cifs_fid fid; /* file id from remote */
1031 /* BB add lock scope info here if needed */ ;
1032 /* lock scope id (0 if none) */
1033 struct dentry *dentry;
1034 unsigned int f_flags;
1035 struct tcon_link *tlink;
1036 bool invalidHandle:1; /* file closed via session abend */
1037 bool oplock_break_cancelled:1;
1038 int count; /* refcount protected by cifs_file_list_lock */
1039 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1040 struct cifs_search_info srch_inf;
1041 struct work_struct oplock_break; /* work for oplock breaks */
1044 struct cifs_io_parms {
1046 #ifdef CONFIG_CIFS_SMB2
1047 __u64 persistent_fid; /* persist file id for smb2 */
1048 __u64 volatile_fid; /* volatile file id for smb2 */
1052 unsigned int length;
1053 struct cifs_tcon *tcon;
1056 struct cifs_readdata;
1058 /* asynchronous read support */
1059 struct cifs_readdata {
1060 struct kref refcount;
1061 struct list_head list;
1062 struct completion done;
1063 struct cifsFileInfo *cfile;
1064 struct address_space *mapping;
1067 unsigned int got_bytes;
1070 struct work_struct work;
1071 int (*read_into_pages)(struct TCP_Server_Info *server,
1072 struct cifs_readdata *rdata,
1075 unsigned int pagesz;
1076 unsigned int tailsz;
1077 unsigned int credits;
1078 unsigned int nr_pages;
1079 struct page *pages[];
1082 struct cifs_writedata;
1084 /* asynchronous write support */
1085 struct cifs_writedata {
1086 struct kref refcount;
1087 struct list_head list;
1088 struct completion done;
1089 enum writeback_sync_modes sync_mode;
1090 struct work_struct work;
1091 struct cifsFileInfo *cfile;
1096 unsigned int pagesz;
1097 unsigned int tailsz;
1098 unsigned int credits;
1099 unsigned int nr_pages;
1100 struct page *pages[];
1104 * Take a reference on the file private data. Must be called with
1105 * cifs_file_list_lock held.
1108 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1113 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1114 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1116 #define CIFS_CACHE_READ_FLG 1
1117 #define CIFS_CACHE_HANDLE_FLG 2
1118 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1119 #define CIFS_CACHE_WRITE_FLG 4
1120 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1121 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1123 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1124 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1125 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1128 * One of these for each file inode
1131 struct cifsInodeInfo {
1132 bool can_cache_brlcks;
1133 struct list_head llist; /* locks helb by this inode */
1134 struct rw_semaphore lock_sem; /* protect the fields above */
1135 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1136 struct list_head openFileList;
1137 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1138 unsigned int oplock; /* oplock/lease level we have */
1139 unsigned int epoch; /* used to track lease state changes */
1140 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1141 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1142 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1143 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1144 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1145 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1146 unsigned long flags;
1147 spinlock_t writers_lock;
1148 unsigned int writers; /* Number of writers on this inode */
1149 unsigned long time; /* jiffies of last update of inode */
1150 u64 server_eof; /* current file size on server -- protected by i_lock */
1151 u64 uniqueid; /* server inode number */
1152 u64 createtime; /* creation time on server */
1153 #ifdef CONFIG_CIFS_SMB2
1154 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1156 #ifdef CONFIG_CIFS_FSCACHE
1157 struct fscache_cookie *fscache;
1159 struct inode vfs_inode;
1162 static inline struct cifsInodeInfo *
1163 CIFS_I(struct inode *inode)
1165 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1168 static inline struct cifs_sb_info *
1169 CIFS_SB(struct super_block *sb)
1171 return sb->s_fs_info;
1174 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1176 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1183 convert_delimiter(char *path, char delim)
1185 char old_delim, *pos;
1193 while ((pos = strchr(pos, old_delim)))
1197 #ifdef CONFIG_CIFS_STATS
1198 #define cifs_stats_inc atomic_inc
1200 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1204 spin_lock(&tcon->stat_lock);
1205 tcon->bytes_written += bytes;
1206 spin_unlock(&tcon->stat_lock);
1210 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1213 spin_lock(&tcon->stat_lock);
1214 tcon->bytes_read += bytes;
1215 spin_unlock(&tcon->stat_lock);
1219 #define cifs_stats_inc(field) do {} while (0)
1220 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1221 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1227 * This is the prototype for the mid receive function. This function is for
1228 * receiving the rest of the SMB frame, starting with the WordCount (which is
1229 * just after the MID in struct smb_hdr). Note:
1231 * - This will be called by cifsd, with no locks held.
1232 * - The mid will still be on the pending_mid_q.
1233 * - mid->resp_buf will point to the current buffer.
1235 * Returns zero on a successful receive, or an error. The receive state in
1236 * the TCP_Server_Info will also be updated.
1238 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1239 struct mid_q_entry *mid);
1242 * This is the prototype for the mid callback function. This is called once the
1243 * mid has been received off of the socket. When creating one, take special
1244 * care to avoid deadlocks. Things to bear in mind:
1246 * - it will be called by cifsd, with no locks held
1247 * - the mid will be removed from any lists
1249 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1251 /* one of these for every pending CIFS request to the server */
1252 struct mid_q_entry {
1253 struct list_head qhead; /* mids waiting on reply from this server */
1254 struct TCP_Server_Info *server; /* server corresponding to this mid */
1255 __u64 mid; /* multiplex id */
1256 __u32 pid; /* process id */
1257 __u32 sequence_number; /* for CIFS signing */
1258 unsigned long when_alloc; /* when mid was created */
1259 #ifdef CONFIG_CIFS_STATS2
1260 unsigned long when_sent; /* time when smb send finished */
1261 unsigned long when_received; /* when demux complete (taken off wire) */
1263 mid_receive_t *receive; /* call receive callback */
1264 mid_callback_t *callback; /* call completion callback */
1265 void *callback_data; /* general purpose pointer for callback */
1266 void *resp_buf; /* pointer to received SMB header */
1267 int mid_state; /* wish this were enum but can not pass to wait_event */
1268 __le16 command; /* smb command code */
1269 bool large_buf:1; /* if valid response, is pointer to large buf */
1270 bool multiRsp:1; /* multiple trans2 responses for one request */
1271 bool multiEnd:1; /* both received */
1274 /* Make code in transport.c a little cleaner by moving
1275 update of optional stats into function below */
1276 #ifdef CONFIG_CIFS_STATS2
1278 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1280 atomic_inc(&server->in_send);
1283 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1285 atomic_dec(&server->in_send);
1288 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1290 atomic_inc(&server->num_waiters);
1293 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1295 atomic_dec(&server->num_waiters);
1298 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1300 mid->when_sent = jiffies;
1303 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1306 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1310 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1314 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1318 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1323 /* for pending dnotify requests */
1324 struct dir_notify_req {
1325 struct list_head lhead;
1332 __u32 filter; /* CompletionFilter (for multishot) */
1337 struct dfs_info3_param {
1338 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1347 * common struct for holding inode info when searching for or updating an
1348 * inode with new info
1351 #define CIFS_FATTR_DFS_REFERRAL 0x1
1352 #define CIFS_FATTR_DELETE_PENDING 0x2
1353 #define CIFS_FATTR_NEED_REVAL 0x4
1354 #define CIFS_FATTR_INO_COLLISION 0x8
1355 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1368 unsigned int cf_nlink;
1369 unsigned int cf_dtype;
1370 struct timespec cf_atime;
1371 struct timespec cf_mtime;
1372 struct timespec cf_ctime;
1375 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1378 kfree(param->path_name);
1379 kfree(param->node_name);
1384 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1385 int number_of_items)
1388 if ((number_of_items == 0) || (param == NULL))
1390 for (i = 0; i < number_of_items; i++) {
1391 kfree(param[i].path_name);
1392 kfree(param[i].node_name);
1398 #define MID_REQUEST_ALLOCATED 1
1399 #define MID_REQUEST_SUBMITTED 2
1400 #define MID_RESPONSE_RECEIVED 4
1401 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1402 #define MID_RESPONSE_MALFORMED 0x10
1403 #define MID_SHUTDOWN 0x20
1405 /* Types of response buffer returned from SendReceive2 */
1406 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1407 #define CIFS_SMALL_BUFFER 1
1408 #define CIFS_LARGE_BUFFER 2
1409 #define CIFS_IOVEC 4 /* array of response buffers */
1411 /* Type of Request to SendReceive2 */
1412 #define CIFS_BLOCKING_OP 1 /* operation can block */
1413 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1414 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1415 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1416 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1417 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1419 /* Type of request operation */
1420 #define CIFS_ECHO_OP 0x080 /* echo request */
1421 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1422 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1423 #define CIFS_OP_MASK 0x0380 /* mask request type */
1424 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1426 /* Security Flags: indicate type of session setup needed */
1427 #define CIFSSEC_MAY_SIGN 0x00001
1428 #define CIFSSEC_MAY_NTLM 0x00002
1429 #define CIFSSEC_MAY_NTLMV2 0x00004
1430 #define CIFSSEC_MAY_KRB5 0x00008
1431 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1432 #define CIFSSEC_MAY_LANMAN 0x00010
1433 #define CIFSSEC_MAY_PLNTXT 0x00020
1435 #define CIFSSEC_MAY_LANMAN 0
1436 #define CIFSSEC_MAY_PLNTXT 0
1437 #endif /* weak passwords */
1438 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1439 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1441 #define CIFSSEC_MUST_SIGN 0x01001
1442 /* note that only one of the following can be set so the
1443 result of setting MUST flags more than once will be to
1444 require use of the stronger protocol */
1445 #define CIFSSEC_MUST_NTLM 0x02002
1446 #define CIFSSEC_MUST_NTLMV2 0x04004
1447 #define CIFSSEC_MUST_KRB5 0x08008
1448 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1449 #define CIFSSEC_MUST_LANMAN 0x10010
1450 #define CIFSSEC_MUST_PLNTXT 0x20020
1451 #ifdef CONFIG_CIFS_UPCALL
1452 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1454 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1456 #else /* do not allow weak pw hash */
1457 #define CIFSSEC_MUST_LANMAN 0
1458 #define CIFSSEC_MUST_PLNTXT 0
1459 #ifdef CONFIG_CIFS_UPCALL
1460 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1462 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1464 #endif /* WEAK_PW_HASH */
1465 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1466 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1468 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1469 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1470 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1472 *****************************************************************
1473 * All constants go here
1474 *****************************************************************
1477 #define UID_HASH (16)
1480 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1481 * following to be declared.
1484 /****************************************************************************
1485 * Locking notes. All updates to global variables and lists should be
1486 * protected by spinlocks or semaphores.
1490 * GlobalMid_Lock protects:
1491 * list operations on pending_mid_q and oplockQ
1492 * updates to XID counters, multiplex id and SMB sequence numbers
1493 * cifs_file_list_lock protects:
1494 * list operations on tcp and SMB session lists and tCon lists
1495 * f_owner.lock protects certain per file struct operations
1496 * mapping->page_lock protects certain per page operations
1500 * sesSem operations on smb session
1501 * tconSem operations on tree connection
1502 * fh_sem file handle reconnection operations
1504 ****************************************************************************/
1506 #ifdef DECLARE_GLOBALS_HERE
1507 #define GLOBAL_EXTERN
1509 #define GLOBAL_EXTERN extern
1513 * the list of TCP_Server_Info structures, ie each of the sockets
1514 * connecting our client to a distinct server (ip address), is
1515 * chained together by cifs_tcp_ses_list. The list of all our SMB
1516 * sessions (and from that the tree connections) can be found
1517 * by iterating over cifs_tcp_ses_list
1519 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1522 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1523 * tcp session, and the list of tcon's per smb session. It also protects
1524 * the reference counters for the server, smb session, and tcon. Finally,
1525 * changes to the tcon->tidStatus should be done while holding this lock.
1527 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1530 * This lock protects the cifs_file->llist and cifs_file->flist
1531 * list operations, and updates to some flags (cifs_file->invalidHandle)
1532 * It will be moved to either use the tcon->stat_lock or equivalent later.
1533 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1534 * the cifs_tcp_ses_lock must be grabbed first and released last.
1536 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1538 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1539 /* Outstanding dir notify requests */
1540 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1541 /* DirNotify response queue */
1542 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1543 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1546 * Global transaction id (XID) information
1548 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1549 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1550 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1551 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1552 /* on midQ entries */
1554 * Global counters, updated atomically
1556 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1557 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1558 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1559 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1560 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1562 /* Various Debug counters */
1563 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1564 #ifdef CONFIG_CIFS_STATS2
1565 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1566 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1568 GLOBAL_EXTERN atomic_t smBufAllocCount;
1569 GLOBAL_EXTERN atomic_t midCount;
1572 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1573 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1574 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1575 with more secure ntlmssp2 challenge/resp */
1576 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1577 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1578 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1579 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1580 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1581 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1583 #ifdef CONFIG_CIFS_ACL
1584 GLOBAL_EXTERN struct rb_root uidtree;
1585 GLOBAL_EXTERN struct rb_root gidtree;
1586 GLOBAL_EXTERN spinlock_t siduidlock;
1587 GLOBAL_EXTERN spinlock_t sidgidlock;
1588 GLOBAL_EXTERN struct rb_root siduidtree;
1589 GLOBAL_EXTERN struct rb_root sidgidtree;
1590 GLOBAL_EXTERN spinlock_t uidsidlock;
1591 GLOBAL_EXTERN spinlock_t gidsidlock;
1592 #endif /* CONFIG_CIFS_ACL */
1594 void cifs_oplock_break(struct work_struct *work);
1596 extern const struct slow_work_ops cifs_oplock_break_ops;
1597 extern struct workqueue_struct *cifsiod_wq;
1599 extern mempool_t *cifs_mid_poolp;
1601 /* Operations for different SMB versions */
1602 #define SMB1_VERSION_STRING "1.0"
1603 extern struct smb_version_operations smb1_operations;
1604 extern struct smb_version_values smb1_values;
1605 #define SMB20_VERSION_STRING "2.0"
1606 extern struct smb_version_operations smb20_operations;
1607 extern struct smb_version_values smb20_values;
1608 #define SMB21_VERSION_STRING "2.1"
1609 extern struct smb_version_operations smb21_operations;
1610 extern struct smb_version_values smb21_values;
1611 #define SMB30_VERSION_STRING "3.0"
1612 extern struct smb_version_operations smb30_operations;
1613 extern struct smb_version_values smb30_values;
1614 #define SMB302_VERSION_STRING "3.02"
1615 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1616 extern struct smb_version_values smb302_values;
1617 #endif /* _CIFS_GLOB_H */