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 #ifdef CONFIG_CIFS_SMB2
36 * The sizes of various internal tables and strings
38 #define MAX_UID_INFO 16
39 #define MAX_SES_INFO 2
40 #define MAX_TCON_INFO 4
42 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
43 #define MAX_SERVER_SIZE 15
44 #define MAX_SHARE_SIZE 80
45 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
46 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
48 #define CIFS_MIN_RCV_POOL 4
50 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
52 * default attribute cache timeout (jiffies)
54 #define CIFS_DEF_ACTIMEO (1 * HZ)
57 * max attribute cache timeout (jiffies) - 2^30
59 #define CIFS_MAX_ACTIMEO (1 << 30)
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* currently length of NIP6_FMT */
71 #define SERVER_NAME_LENGTH 40
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* used to define string lengths for reversing unicode strings */
76 /* (max path length + 1 for null) * 2 for unicode */
79 /* SMB echo "timeout" -- FIXME: tunable? */
80 #define SMB_ECHO_INTERVAL (60 * HZ)
84 #ifndef XATTR_DOS_ATTRIB
85 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
89 * CIFS vfs client Status information (based on what we know.)
92 /* associated with each tcp and smb session */
102 LANMAN = 0, /* 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 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
107 Kerberos, /* Kerberos via SPNEGO */
113 /* Netbios frames protocol not supported at this time */
121 /* crypto security descriptor definition */
123 struct shash_desc shash;
127 /* crypto hashing related structure/fields, not specific to a sec mech */
128 struct cifs_secmech {
129 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
130 struct crypto_shash *md5; /* md5 hash function */
131 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
132 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
135 /* per smb session structure/fields */
136 struct ntlmssp_auth {
137 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
138 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
139 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
140 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
148 struct cifs_sid osid;
149 struct cifs_sid gsid;
150 struct cifs_ntace *ntaces;
151 struct cifs_ace *aces;
155 *****************************************************************
156 * Except the CIFS PDUs themselves all the
157 * globally interesting structs should go here
158 *****************************************************************
167 struct TCP_Server_Info;
171 struct dfs_info3_param;
175 struct cifs_readdata;
177 struct smb_version_operations {
178 int (*send_cancel)(struct TCP_Server_Info *, void *,
179 struct mid_q_entry *);
180 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
181 /* setup request: allocate mid, sign message */
182 int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
183 struct mid_q_entry **);
184 /* setup async request: allocate mid, sign message */
185 int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
186 unsigned int, struct mid_q_entry **);
187 /* check response: verify signature, map error */
188 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
190 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
192 void (*set_credits)(struct TCP_Server_Info *, const int);
193 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
194 unsigned int (*get_credits)(struct mid_q_entry *);
195 __u64 (*get_next_mid)(struct TCP_Server_Info *);
196 /* data offset from read response message */
197 unsigned int (*read_data_offset)(char *);
198 /* data length from read response message */
199 unsigned int (*read_data_length)(char *);
200 /* map smb to linux error */
201 int (*map_error)(char *, bool);
202 /* find mid corresponding to the response message */
203 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
204 void (*dump_detail)(void *);
205 void (*clear_stats)(struct cifs_tcon *);
206 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
207 /* verify the message */
208 int (*check_message)(char *, unsigned int);
209 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
210 /* process transaction2 response */
211 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
213 /* check if we need to negotiate */
214 bool (*need_neg)(struct TCP_Server_Info *);
215 /* negotiate to the server */
216 int (*negotiate)(const unsigned int, struct cifs_ses *);
217 /* set negotiated write size */
218 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
219 /* set negotiated read size */
220 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
221 /* setup smb sessionn */
222 int (*sess_setup)(const unsigned int, struct cifs_ses *,
223 const struct nls_table *);
224 /* close smb session */
225 int (*logoff)(const unsigned int, struct cifs_ses *);
226 /* connect to a server share */
227 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
228 struct cifs_tcon *, const struct nls_table *);
229 /* close tree connecion */
230 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
231 /* get DFS referrals */
232 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
233 const char *, struct dfs_info3_param **,
234 unsigned int *, const struct nls_table *, int);
235 /* informational QFS call */
236 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
237 /* check if a path is accessible or not */
238 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
239 struct cifs_sb_info *, const char *);
240 /* query path data from the server */
241 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
242 struct cifs_sb_info *, const char *,
243 FILE_ALL_INFO *, bool *);
244 /* query file data from the server */
245 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
246 struct cifs_fid *, FILE_ALL_INFO *);
247 /* get server index number */
248 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
249 struct cifs_sb_info *, const char *,
250 u64 *uniqueid, FILE_ALL_INFO *);
251 /* build a full path to the root of the mount */
252 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
254 /* check if we can send an echo or nor */
255 bool (*can_echo)(struct TCP_Server_Info *);
256 /* send echo request */
257 int (*echo)(struct TCP_Server_Info *);
258 /* create directory */
259 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
260 struct cifs_sb_info *);
261 /* set info on created directory */
262 void (*mkdir_setinfo)(struct inode *, const char *,
263 struct cifs_sb_info *, struct cifs_tcon *,
265 /* remove directory */
266 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
267 struct cifs_sb_info *);
269 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
270 struct cifs_sb_info *);
271 /* open, rename and delete file */
272 int (*rename_pending_delete)(const char *, struct dentry *,
274 /* open a file for non-posix mounts */
275 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
276 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
277 struct cifs_sb_info *);
278 /* set fid protocol-specific info */
279 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
281 int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
282 /* send a flush request to the server */
283 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
284 /* async read from the server */
285 int (*async_readv)(struct cifs_readdata *);
288 struct smb_version_values {
289 char *version_string;
290 __u32 large_lock_type;
291 __u32 exclusive_lock_type;
292 __u32 shared_lock_type;
293 __u32 unlock_lock_type;
295 size_t max_header_size;
296 size_t read_rsp_size;
298 unsigned int cap_unix;
299 unsigned int cap_nt_find;
300 unsigned int cap_large_files;
303 #define HEADER_SIZE(server) (server->vals->header_size)
304 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
312 char *iocharset; /* local code page for mapping to and from Unicode */
313 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
314 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
330 bool no_psx_acl:1; /* set if posix acl support should be disabled */
332 bool backupuid_specified; /* mount option backupuid is specified */
333 bool backupgid_specified; /* mount option backupgid is specified */
334 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
335 bool server_ino:1; /* use inode numbers from server ie UniqueId */
337 bool strict_io:1; /* strict cache behavior */
338 bool remap:1; /* set to remap seven reserved chars in filenames */
339 bool posix_paths:1; /* unset to not ask for posix pathnames. */
342 bool nullauth:1; /* attempt to authenticate with null user */
343 bool nocase:1; /* request case insensitive filenames */
344 bool nobrl:1; /* disable sending byte range locks to srv */
345 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
346 bool seal:1; /* request transport encryption on share */
347 bool nodfs:1; /* Do not request DFS, even if available */
348 bool local_lease:1; /* check leases only on local system, not remote */
351 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
352 bool fsc:1; /* enable fscache */
353 bool mfsymlinks:1; /* use Minshall+French Symlinks */
355 bool rwpidforward:1; /* pid forward for read/write operations */
358 bool sockopt_tcp_nodelay:1;
359 unsigned short int port;
360 unsigned long actimeo; /* attribute cache timeout (jiffies) */
361 struct smb_version_operations *ops;
362 struct smb_version_values *vals;
364 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
365 struct nls_table *local_nls;
368 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
369 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
370 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
371 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
372 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
373 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
374 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
375 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
376 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
377 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
379 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
380 MS_NODEV | MS_SYNCHRONOUS)
382 struct cifs_mnt_data {
383 struct cifs_sb_info *cifs_sb;
388 static inline unsigned int
389 get_rfc1002_length(void *buf)
391 return be32_to_cpu(*((__be32 *)buf));
395 inc_rfc1001_len(void *buf, int count)
397 be32_add_cpu((__be32 *)buf, count);
400 struct TCP_Server_Info {
401 struct list_head tcp_ses_list;
402 struct list_head smb_ses_list;
403 int srv_count; /* reference counter */
404 /* 15 character server name + 0x20 16th byte indicating type = srv */
405 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
406 struct smb_version_operations *ops;
407 struct smb_version_values *vals;
408 enum statusEnum tcpStatus; /* what we think the status is */
409 char *hostname; /* hostname portion of UNC string */
410 struct socket *ssocket;
411 struct sockaddr_storage dstaddr;
412 struct sockaddr_storage srcaddr; /* locally bind to this IP */
416 wait_queue_head_t response_q;
417 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
418 struct list_head pending_mid_q;
419 bool noblocksnd; /* use blocking sendmsg */
420 bool noautotune; /* do not autotune send buf sizes */
422 int credits; /* send no more requests at once */
423 unsigned int in_flight; /* number of requests on the wire to server */
424 spinlock_t req_lock; /* protect the two values above */
425 struct mutex srv_mutex;
426 struct task_struct *tsk;
427 char server_GUID[16];
429 bool session_estab; /* mark when very first sess is established */
430 #ifdef CONFIG_CIFS_SMB2
431 int echo_credits; /* echo reserved slots */
432 int oplock_credits; /* oplock break reserved slots */
433 bool echoes:1; /* enable echoes */
435 u16 dialect; /* dialect index that server chose */
436 enum securityEnum secType;
437 bool oplocks:1; /* enable oplocks */
438 unsigned int maxReq; /* Clients should submit no more */
439 /* than maxReq distinct unanswered SMBs to the server when using */
440 /* multiplexed reads or writes */
441 unsigned int maxBuf; /* maxBuf specifies the maximum */
442 /* message size the server can send or receive for non-raw SMBs */
443 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
444 /* when socket is setup (and during reconnect) before NegProt sent */
445 unsigned int max_rw; /* maxRw specifies the maximum */
446 /* message size the server can send or receive for */
447 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
448 unsigned int max_vcs; /* maximum number of smb sessions, at least
449 those that can be specified uniquely with
451 unsigned int capabilities; /* selective disabling of caps by smb sess */
452 int timeAdj; /* Adjust for difference in server time zone in sec */
453 __u64 CurrentMid; /* multiplex id - rotating counter */
454 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
455 /* 16th byte of RFC1001 workstation name is always null */
456 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
457 __u32 sequence_number; /* for signing, protected by srv_mutex */
458 struct session_key session_key;
459 unsigned long lstrp; /* when we got last response from this server */
460 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
461 /* extended security flavors that server supports */
462 bool sec_ntlmssp; /* supports NTLMSSP */
463 bool sec_kerberosu2u; /* supports U2U Kerberos */
464 bool sec_kerberos; /* supports plain Kerberos */
465 bool sec_mskerberos; /* supports legacy MS Kerberos */
466 bool large_buf; /* is current buffer large? */
467 struct delayed_work echo; /* echo ping workqueue job */
468 struct kvec *iov; /* reusable kvec array for receives */
469 unsigned int nr_iov; /* number of kvecs in array */
470 char *smallbuf; /* pointer to current "small" buffer */
471 char *bigbuf; /* pointer to current "big" buffer */
472 unsigned int total_read; /* total amount of data read in this pass */
473 #ifdef CONFIG_CIFS_FSCACHE
474 struct fscache_cookie *fscache; /* client index cache cookie */
476 #ifdef CONFIG_CIFS_STATS2
477 atomic_t in_send; /* requests trying to send */
478 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
480 #ifdef CONFIG_CIFS_SMB2
481 unsigned int max_read;
482 unsigned int max_write;
483 #endif /* CONFIG_CIFS_SMB2 */
486 static inline unsigned int
487 in_flight(struct TCP_Server_Info *server)
490 spin_lock(&server->req_lock);
491 num = server->in_flight;
492 spin_unlock(&server->req_lock);
497 has_credits(struct TCP_Server_Info *server, int *credits)
500 spin_lock(&server->req_lock);
502 spin_unlock(&server->req_lock);
507 add_credits(struct TCP_Server_Info *server, const unsigned int add,
510 server->ops->add_credits(server, add, optype);
514 set_credits(struct TCP_Server_Info *server, const int val)
516 server->ops->set_credits(server, val);
520 get_next_mid(struct TCP_Server_Info *server)
522 return server->ops->get_next_mid(server);
526 * When the server supports very large reads and writes via POSIX extensions,
527 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
528 * including the RFC1001 length.
530 * Note that this might make for "interesting" allocation problems during
531 * writeback however as we have to allocate an array of pointers for the
532 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
534 * For reads, there is a similar problem as we need to allocate an array
535 * of kvecs to handle the receive, though that should only need to be done
538 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
539 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
542 * When the server doesn't allow large posix writes, only allow a rsize/wsize
543 * of 2^17-1 minus the size of the call header. That allows for a read or
544 * write up to the maximum size described by RFC1002.
546 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
547 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
550 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
551 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
552 * a single wsize request with a single call.
554 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
557 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
558 * those values when posix extensions aren't in force. In actuality here, we
559 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
560 * to be ok with the extra byte even though Windows doesn't send writes that
565 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
567 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
568 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
571 * On hosts with high memory, we can't currently support wsize/rsize that are
572 * larger than we can kmap at once. Cap the rsize/wsize at
573 * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request
574 * larger than that anyway.
576 #ifdef CONFIG_HIGHMEM
577 #define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE)
578 #else /* CONFIG_HIGHMEM */
579 #define CIFS_KMAP_SIZE_LIMIT (1<<24)
580 #endif /* CONFIG_HIGHMEM */
583 * Macros to allow the TCP_Server_Info->net field and related code to drop out
584 * when CONFIG_NET_NS isn't set.
589 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
594 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
601 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
606 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
613 * Session structure. One of these for each uid session with a particular host
616 struct list_head smb_ses_list;
617 struct list_head tcon_list;
618 struct mutex session_mutex;
619 struct TCP_Server_Info *server; /* pointer to server info */
620 int ses_count; /* reference counter */
621 enum statusEnum status;
622 unsigned overrideSecFlg; /* if non-zero override global sec flags */
623 __u16 ipc_tid; /* special tid for connection to IPC share */
626 char *serverOS; /* name of operating system underlying server */
627 char *serverNOS; /* name of network operating system of server */
628 char *serverDomain; /* security realm of server */
629 __u64 Suid; /* remote smb uid */
630 uid_t linux_uid; /* overriding owner of files on the mount */
631 uid_t cred_uid; /* owner of credentials */
632 unsigned int capabilities;
633 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
634 TCP names - will ipv6 and sctp addresses fit? */
635 char *user_name; /* must not be null except during init of sess
636 and after mount option parsing we fill it */
639 struct session_key auth_key;
640 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
641 bool need_reconnect:1; /* connection reset, uid now invalid */
642 #ifdef CONFIG_CIFS_SMB2
644 #endif /* CONFIG_CIFS_SMB2 */
646 /* no more than one of the following three session flags may be set */
647 #define CIFS_SES_NT4 1
648 #define CIFS_SES_OS2 2
649 #define CIFS_SES_W9X 4
650 /* following flag is set for old servers such as OS2 (and Win95?)
651 which do not negotiate NTLM or POSIX dialects, but instead
652 negotiate one of the older LANMAN dialects */
653 #define CIFS_SES_LANMAN 8
656 cap_unix(struct cifs_ses *ses)
658 return ses->server->vals->cap_unix & ses->capabilities;
662 * there is one of these for each connection to a resource on a particular
666 struct list_head tcon_list;
668 struct list_head openFileList;
669 struct cifs_ses *ses; /* pointer to session associated with */
670 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
671 char *nativeFileSystem;
672 char *password; /* for share-level security */
673 __u32 tid; /* The 4 byte tree id */
674 __u16 Flags; /* optional support bits */
675 enum statusEnum tidStatus;
676 #ifdef CONFIG_CIFS_STATS
677 atomic_t num_smbs_sent;
682 atomic_t num_flushes;
683 atomic_t num_oplock_brks;
686 atomic_t num_deletes;
688 atomic_t num_posixopens;
689 atomic_t num_posixmkdirs;
691 atomic_t num_renames;
692 atomic_t num_t2renames;
696 atomic_t num_hardlinks;
697 atomic_t num_symlinks;
699 atomic_t num_acl_get;
700 atomic_t num_acl_set;
702 #ifdef CONFIG_CIFS_SMB2
704 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
705 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
707 #endif /* CONFIG_CIFS_SMB2 */
709 #ifdef CONFIG_CIFS_STATS2
710 unsigned long long time_writes;
711 unsigned long long time_reads;
712 unsigned long long time_opens;
713 unsigned long long time_deletes;
714 unsigned long long time_closes;
715 unsigned long long time_mkdirs;
716 unsigned long long time_rmdirs;
717 unsigned long long time_renames;
718 unsigned long long time_t2renames;
719 unsigned long long time_ffirst;
720 unsigned long long time_fnext;
721 unsigned long long time_fclose;
722 #endif /* CONFIG_CIFS_STATS2 */
725 spinlock_t stat_lock;
726 #endif /* CONFIG_CIFS_STATS */
727 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
728 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
729 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
730 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
733 bool seal:1; /* transport encryption for this mounted share */
734 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
735 for this mount even if server would support */
736 bool local_lease:1; /* check leases (only) on local system not remote */
737 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
738 bool need_reconnect:1; /* connection reset, tid now invalid */
739 #ifdef CONFIG_CIFS_SMB2
740 bool print:1; /* set if connection to printer share */
741 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
744 __u32 maximal_access;
745 __u32 vol_serial_number;
746 __le64 vol_create_time;
747 #endif /* CONFIG_CIFS_SMB2 */
748 #ifdef CONFIG_CIFS_FSCACHE
749 u64 resource_id; /* server resource id */
750 struct fscache_cookie *fscache; /* cookie for share */
752 /* BB add field for back pointer to sb struct(s)? */
756 * This is a refcounted and timestamped container for a tcon pointer. The
757 * container holds a tcon reference. It is considered safe to free one of
758 * these when the tl_count goes to 0. The tl_time is the time of the last
759 * "get" on the container.
762 struct rb_node tl_rbnode;
764 unsigned long tl_flags;
765 #define TCON_LINK_MASTER 0
766 #define TCON_LINK_PENDING 1
767 #define TCON_LINK_IN_TREE 2
768 unsigned long tl_time;
770 struct cifs_tcon *tl_tcon;
773 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
775 static inline struct cifs_tcon *
776 tlink_tcon(struct tcon_link *tlink)
778 return tlink->tl_tcon;
781 extern void cifs_put_tlink(struct tcon_link *tlink);
783 static inline struct tcon_link *
784 cifs_get_tlink(struct tcon_link *tlink)
786 if (tlink && !IS_ERR(tlink))
787 atomic_inc(&tlink->tl_count);
791 /* This function is always expected to succeed */
792 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
795 * This info hangs off the cifsFileInfo structure, pointed to by llist.
796 * This is used to track byte stream locks on the file
798 struct cifsLockInfo {
799 struct list_head llist; /* pointer to next cifsLockInfo */
800 struct list_head blist; /* pointer to locks blocked on this */
801 wait_queue_head_t block_q;
809 * One of these for each open instance of a file
811 struct cifs_search_info {
812 loff_t index_of_last_entry;
813 __u16 entries_in_buffer;
816 char *ntwrk_buf_start;
817 char *srch_entries_start;
819 const char *presume_name;
820 unsigned int resume_name_len;
824 bool smallBuf:1; /* so we know which buf_release function to call */
829 #ifdef CONFIG_CIFS_SMB2
830 __u64 persistent_fid; /* persist file id for smb2 */
831 __u64 volatile_fid; /* volatile file id for smb2 */
835 struct cifsFileInfo {
836 struct list_head tlist; /* pointer to next fid owned by tcon */
837 struct list_head flist; /* next fid (file instance) for this inode */
838 struct list_head llist; /*
839 * brlocks held by this fid, protected by
840 * lock_mutex from cifsInodeInfo structure
842 unsigned int uid; /* allows finding which FileInfo structure */
843 __u32 pid; /* process id who opened file */
844 struct cifs_fid fid; /* file id from remote */
845 /* BB add lock scope info here if needed */ ;
846 /* lock scope id (0 if none) */
847 struct dentry *dentry;
848 unsigned int f_flags;
849 struct tcon_link *tlink;
850 bool invalidHandle:1; /* file closed via session abend */
851 bool oplock_break_cancelled:1;
852 int count; /* refcount protected by cifs_file_list_lock */
853 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
854 struct cifs_search_info srch_inf;
855 struct work_struct oplock_break; /* work for oplock breaks */
858 struct cifs_io_parms {
863 struct cifs_tcon *tcon;
867 * Take a reference on the file private data. Must be called with
868 * cifs_file_list_lock held.
871 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
876 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
877 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
880 * One of these for each file inode
883 struct cifsInodeInfo {
884 bool can_cache_brlcks;
885 struct mutex lock_mutex; /*
886 * protect the field above and llist
887 * from every cifsFileInfo structure
890 /* BB add in lists for dirty pages i.e. write caching info for oplock */
891 struct list_head openFileList;
892 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
893 bool clientCanCacheRead; /* read oplock */
894 bool clientCanCacheAll; /* read and writebehind oplock */
895 bool delete_pending; /* DELETE_ON_CLOSE is set */
896 bool invalid_mapping; /* pagecache is invalid */
897 unsigned long time; /* jiffies of last update of inode */
898 u64 server_eof; /* current file size on server -- protected by i_lock */
899 u64 uniqueid; /* server inode number */
900 u64 createtime; /* creation time on server */
901 #ifdef CONFIG_CIFS_FSCACHE
902 struct fscache_cookie *fscache;
904 struct inode vfs_inode;
907 static inline struct cifsInodeInfo *
908 CIFS_I(struct inode *inode)
910 return container_of(inode, struct cifsInodeInfo, vfs_inode);
913 static inline struct cifs_sb_info *
914 CIFS_SB(struct super_block *sb)
916 return sb->s_fs_info;
919 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
921 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
928 convert_delimiter(char *path, char delim)
941 for (i = 0; path[i] != '\0'; i++) {
942 if (path[i] == old_delim)
948 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
949 struct cifs_tcon *tcon)
951 if (!vol->ops->build_path_to_root)
953 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
956 #ifdef CONFIG_CIFS_STATS
957 #define cifs_stats_inc atomic_inc
959 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
963 spin_lock(&tcon->stat_lock);
964 tcon->bytes_written += bytes;
965 spin_unlock(&tcon->stat_lock);
969 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
972 spin_lock(&tcon->stat_lock);
973 tcon->bytes_read += bytes;
974 spin_unlock(&tcon->stat_lock);
978 #define cifs_stats_inc(field) do {} while (0)
979 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
980 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
986 * This is the prototype for the mid receive function. This function is for
987 * receiving the rest of the SMB frame, starting with the WordCount (which is
988 * just after the MID in struct smb_hdr). Note:
990 * - This will be called by cifsd, with no locks held.
991 * - The mid will still be on the pending_mid_q.
992 * - mid->resp_buf will point to the current buffer.
994 * Returns zero on a successful receive, or an error. The receive state in
995 * the TCP_Server_Info will also be updated.
997 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
998 struct mid_q_entry *mid);
1001 * This is the prototype for the mid callback function. This is called once the
1002 * mid has been received off of the socket. When creating one, take special
1003 * care to avoid deadlocks. Things to bear in mind:
1005 * - it will be called by cifsd, with no locks held
1006 * - the mid will be removed from any lists
1008 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1010 /* one of these for every pending CIFS request to the server */
1011 struct mid_q_entry {
1012 struct list_head qhead; /* mids waiting on reply from this server */
1013 struct TCP_Server_Info *server; /* server corresponding to this mid */
1014 __u64 mid; /* multiplex id */
1015 __u32 pid; /* process id */
1016 __u32 sequence_number; /* for CIFS signing */
1017 unsigned long when_alloc; /* when mid was created */
1018 #ifdef CONFIG_CIFS_STATS2
1019 unsigned long when_sent; /* time when smb send finished */
1020 unsigned long when_received; /* when demux complete (taken off wire) */
1022 mid_receive_t *receive; /* call receive callback */
1023 mid_callback_t *callback; /* call completion callback */
1024 void *callback_data; /* general purpose pointer for callback */
1025 void *resp_buf; /* pointer to received SMB header */
1026 int mid_state; /* wish this were enum but can not pass to wait_event */
1027 __le16 command; /* smb command code */
1028 bool large_buf:1; /* if valid response, is pointer to large buf */
1029 bool multiRsp:1; /* multiple trans2 responses for one request */
1030 bool multiEnd:1; /* both received */
1033 /* Make code in transport.c a little cleaner by moving
1034 update of optional stats into function below */
1035 #ifdef CONFIG_CIFS_STATS2
1037 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1039 atomic_inc(&server->in_send);
1042 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1044 atomic_dec(&server->in_send);
1047 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1049 atomic_inc(&server->num_waiters);
1052 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1054 atomic_dec(&server->num_waiters);
1057 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1059 mid->when_sent = jiffies;
1062 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1065 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1069 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1073 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1077 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1082 /* for pending dnotify requests */
1083 struct dir_notify_req {
1084 struct list_head lhead;
1091 __u32 filter; /* CompletionFilter (for multishot) */
1096 struct dfs_info3_param {
1097 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1106 * common struct for holding inode info when searching for or updating an
1107 * inode with new info
1110 #define CIFS_FATTR_DFS_REFERRAL 0x1
1111 #define CIFS_FATTR_DELETE_PENDING 0x2
1112 #define CIFS_FATTR_NEED_REVAL 0x4
1113 #define CIFS_FATTR_INO_COLLISION 0x8
1126 unsigned int cf_nlink;
1127 unsigned int cf_dtype;
1128 struct timespec cf_atime;
1129 struct timespec cf_mtime;
1130 struct timespec cf_ctime;
1133 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1136 kfree(param->path_name);
1137 kfree(param->node_name);
1142 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1143 int number_of_items)
1146 if ((number_of_items == 0) || (param == NULL))
1148 for (i = 0; i < number_of_items; i++) {
1149 kfree(param[i].path_name);
1150 kfree(param[i].node_name);
1156 #define MID_REQUEST_ALLOCATED 1
1157 #define MID_REQUEST_SUBMITTED 2
1158 #define MID_RESPONSE_RECEIVED 4
1159 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1160 #define MID_RESPONSE_MALFORMED 0x10
1161 #define MID_SHUTDOWN 0x20
1163 /* Types of response buffer returned from SendReceive2 */
1164 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1165 #define CIFS_SMALL_BUFFER 1
1166 #define CIFS_LARGE_BUFFER 2
1167 #define CIFS_IOVEC 4 /* array of response buffers */
1169 /* Type of Request to SendReceive2 */
1170 #define CIFS_BLOCKING_OP 1 /* operation can block */
1171 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1172 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1173 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1174 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1175 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1177 /* Type of request operation */
1178 #define CIFS_ECHO_OP 0x080 /* echo request */
1179 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1180 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1181 #define CIFS_OP_MASK 0x0380 /* mask request type */
1183 /* Security Flags: indicate type of session setup needed */
1184 #define CIFSSEC_MAY_SIGN 0x00001
1185 #define CIFSSEC_MAY_NTLM 0x00002
1186 #define CIFSSEC_MAY_NTLMV2 0x00004
1187 #define CIFSSEC_MAY_KRB5 0x00008
1188 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1189 #define CIFSSEC_MAY_LANMAN 0x00010
1190 #define CIFSSEC_MAY_PLNTXT 0x00020
1192 #define CIFSSEC_MAY_LANMAN 0
1193 #define CIFSSEC_MAY_PLNTXT 0
1194 #endif /* weak passwords */
1195 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1196 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1198 #define CIFSSEC_MUST_SIGN 0x01001
1199 /* note that only one of the following can be set so the
1200 result of setting MUST flags more than once will be to
1201 require use of the stronger protocol */
1202 #define CIFSSEC_MUST_NTLM 0x02002
1203 #define CIFSSEC_MUST_NTLMV2 0x04004
1204 #define CIFSSEC_MUST_KRB5 0x08008
1205 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1206 #define CIFSSEC_MUST_LANMAN 0x10010
1207 #define CIFSSEC_MUST_PLNTXT 0x20020
1208 #ifdef CONFIG_CIFS_UPCALL
1209 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1211 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1213 #else /* do not allow weak pw hash */
1214 #define CIFSSEC_MUST_LANMAN 0
1215 #define CIFSSEC_MUST_PLNTXT 0
1216 #ifdef CONFIG_CIFS_UPCALL
1217 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1219 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1221 #endif /* WEAK_PW_HASH */
1222 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1223 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1225 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
1226 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1227 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1229 *****************************************************************
1230 * All constants go here
1231 *****************************************************************
1234 #define UID_HASH (16)
1237 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1238 * following to be declared.
1241 /****************************************************************************
1242 * Locking notes. All updates to global variables and lists should be
1243 * protected by spinlocks or semaphores.
1247 * GlobalMid_Lock protects:
1248 * list operations on pending_mid_q and oplockQ
1249 * updates to XID counters, multiplex id and SMB sequence numbers
1250 * cifs_file_list_lock protects:
1251 * list operations on tcp and SMB session lists and tCon lists
1252 * f_owner.lock protects certain per file struct operations
1253 * mapping->page_lock protects certain per page operations
1257 * sesSem operations on smb session
1258 * tconSem operations on tree connection
1259 * fh_sem file handle reconnection operations
1261 ****************************************************************************/
1263 #ifdef DECLARE_GLOBALS_HERE
1264 #define GLOBAL_EXTERN
1266 #define GLOBAL_EXTERN extern
1270 * the list of TCP_Server_Info structures, ie each of the sockets
1271 * connecting our client to a distinct server (ip address), is
1272 * chained together by cifs_tcp_ses_list. The list of all our SMB
1273 * sessions (and from that the tree connections) can be found
1274 * by iterating over cifs_tcp_ses_list
1276 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1279 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1280 * tcp session, and the list of tcon's per smb session. It also protects
1281 * the reference counters for the server, smb session, and tcon. Finally,
1282 * changes to the tcon->tidStatus should be done while holding this lock.
1284 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1287 * This lock protects the cifs_file->llist and cifs_file->flist
1288 * list operations, and updates to some flags (cifs_file->invalidHandle)
1289 * It will be moved to either use the tcon->stat_lock or equivalent later.
1290 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1291 * the cifs_tcp_ses_lock must be grabbed first and released last.
1293 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1295 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1296 /* Outstanding dir notify requests */
1297 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1298 /* DirNotify response queue */
1299 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1300 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1303 * Global transaction id (XID) information
1305 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1306 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1307 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1308 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1309 /* on midQ entries */
1311 * Global counters, updated atomically
1313 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1314 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1315 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1316 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1317 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1319 /* Various Debug counters */
1320 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1321 #ifdef CONFIG_CIFS_STATS2
1322 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1323 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1325 GLOBAL_EXTERN atomic_t smBufAllocCount;
1326 GLOBAL_EXTERN atomic_t midCount;
1329 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1330 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1331 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1332 with more secure ntlmssp2 challenge/resp */
1333 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1334 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1335 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1336 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1337 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1338 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1340 #ifdef CONFIG_CIFS_ACL
1341 GLOBAL_EXTERN struct rb_root uidtree;
1342 GLOBAL_EXTERN struct rb_root gidtree;
1343 GLOBAL_EXTERN spinlock_t siduidlock;
1344 GLOBAL_EXTERN spinlock_t sidgidlock;
1345 GLOBAL_EXTERN struct rb_root siduidtree;
1346 GLOBAL_EXTERN struct rb_root sidgidtree;
1347 GLOBAL_EXTERN spinlock_t uidsidlock;
1348 GLOBAL_EXTERN spinlock_t gidsidlock;
1349 #endif /* CONFIG_CIFS_ACL */
1351 void cifs_oplock_break(struct work_struct *work);
1353 extern const struct slow_work_ops cifs_oplock_break_ops;
1354 extern struct workqueue_struct *cifsiod_wq;
1356 extern mempool_t *cifs_mid_poolp;
1358 /* Operations for different SMB versions */
1359 #define SMB1_VERSION_STRING "1.0"
1360 extern struct smb_version_operations smb1_operations;
1361 extern struct smb_version_values smb1_values;
1362 #define SMB21_VERSION_STRING "2.1"
1363 extern struct smb_version_operations smb21_operations;
1364 extern struct smb_version_values smb21_values;
1365 #endif /* _CIFS_GLOB_H */