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1/*
2 * fs/cifs/cifsglob.h
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
7 *
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.
12 *
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.
17 *
18 */
19#ifndef _CIFS_GLOB_H
20#define _CIFS_GLOB_H
21
22#include <linux/in.h>
23#include <linux/in6.h>
24#include <linux/slab.h>
25#include <linux/workqueue.h>
26#include "cifs_fs_sb.h"
27#include "cifsacl.h"
28#include <crypto/internal/hash.h>
29#include <linux/scatterlist.h>
30
31/*
32 * The sizes of various internal tables and strings
33 */
34#define MAX_UID_INFO 16
35#define MAX_SES_INFO 2
36#define MAX_TCON_INFO 4
37
38#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
39#define MAX_SERVER_SIZE 15
40#define MAX_SHARE_SIZE 80
41#define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
42#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
43
44#define CIFS_MIN_RCV_POOL 4
45
46/*
47 * default attribute cache timeout (jiffies)
48 */
49#define CIFS_DEF_ACTIMEO (1 * HZ)
50
51/*
52 * max attribute cache timeout (jiffies) - 2^30
53 */
54#define CIFS_MAX_ACTIMEO (1 << 30)
55
56/*
57 * MAX_REQ is the maximum number of requests that WE will send
58 * on one socket concurrently. It also matches the most common
59 * value of max multiplex returned by servers. We may
60 * eventually want to use the negotiated value (in case
61 * future servers can handle more) when we are more confident that
62 * we will not have problems oveloading the socket with pending
63 * write data.
64 */
65#define CIFS_MAX_REQ 50
66
67#define RFC1001_NAME_LEN 15
68#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69
70/* currently length of NIP6_FMT */
71#define SERVER_NAME_LENGTH 40
72#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73
74/* used to define string lengths for reversing unicode strings */
75/* (256+1)*2 = 514 */
76/* (max path length + 1 for null) * 2 for unicode */
77#define MAX_NAME 514
78
79#include "cifspdu.h"
80
81#ifndef XATTR_DOS_ATTRIB
82#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
83#endif
84
85/*
86 * CIFS vfs client Status information (based on what we know.)
87 */
88
89/* associated with each tcp and smb session */
90enum statusEnum {
91 CifsNew = 0,
92 CifsGood,
93 CifsExiting,
94 CifsNeedReconnect,
95 CifsNeedNegotiate
96};
97
98enum securityEnum {
99 LANMAN = 0, /* Legacy LANMAN auth */
100 NTLM, /* Legacy NTLM012 auth with NTLM hash */
101 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
102 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
103/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
104 Kerberos, /* Kerberos via SPNEGO */
105};
106
107enum protocolEnum {
108 TCP = 0,
109 SCTP
110 /* Netbios frames protocol not supported at this time */
111};
112
113struct session_key {
114 unsigned int len;
115 char *response;
116};
117
118/* crypto security descriptor definition */
119struct sdesc {
120 struct shash_desc shash;
121 char ctx[];
122};
123
124/* crypto hashing related structure/fields, not specific to a sec mech */
125struct cifs_secmech {
126 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
127 struct crypto_shash *md5; /* md5 hash function */
128 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
129 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
130};
131
132/* per smb session structure/fields */
133struct ntlmssp_auth {
134 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
135 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
136 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
137 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
138};
139
140struct cifs_cred {
141 int uid;
142 int gid;
143 int mode;
144 int cecount;
145 struct cifs_sid osid;
146 struct cifs_sid gsid;
147 struct cifs_ntace *ntaces;
148 struct cifs_ace *aces;
149};
150
151/*
152 *****************************************************************
153 * Except the CIFS PDUs themselves all the
154 * globally interesting structs should go here
155 *****************************************************************
156 */
157
158struct smb_vol {
159 char *username;
160 char *password;
161 char *domainname;
162 char *UNC;
163 char *UNCip;
164 char *iocharset; /* local code page for mapping to and from Unicode */
165 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
166 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
167 uid_t cred_uid;
168 uid_t linux_uid;
169 gid_t linux_gid;
170 mode_t file_mode;
171 mode_t dir_mode;
172 unsigned secFlg;
173 bool retry:1;
174 bool intr:1;
175 bool setuids:1;
176 bool override_uid:1;
177 bool override_gid:1;
178 bool dynperm:1;
179 bool noperm:1;
180 bool no_psx_acl:1; /* set if posix acl support should be disabled */
181 bool cifs_acl:1;
182 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
183 bool server_ino:1; /* use inode numbers from server ie UniqueId */
184 bool direct_io:1;
185 bool strict_io:1; /* strict cache behavior */
186 bool remap:1; /* set to remap seven reserved chars in filenames */
187 bool posix_paths:1; /* unset to not ask for posix pathnames. */
188 bool no_linux_ext:1;
189 bool sfu_emul:1;
190 bool nullauth:1; /* attempt to authenticate with null user */
191 bool nocase:1; /* request case insensitive filenames */
192 bool nobrl:1; /* disable sending byte range locks to srv */
193 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
194 bool seal:1; /* request transport encryption on share */
195 bool nodfs:1; /* Do not request DFS, even if available */
196 bool local_lease:1; /* check leases only on local system, not remote */
197 bool noblocksnd:1;
198 bool noautotune:1;
199 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
200 bool fsc:1; /* enable fscache */
201 bool mfsymlinks:1; /* use Minshall+French Symlinks */
202 bool multiuser:1;
203 bool rwpidforward:1; /* pid forward for read/write operations */
204 unsigned int rsize;
205 unsigned int wsize;
206 bool sockopt_tcp_nodelay:1;
207 unsigned short int port;
208 unsigned long actimeo; /* attribute cache timeout (jiffies) */
209 char *prepath;
210 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
211 struct nls_table *local_nls;
212};
213
214#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
215 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
216 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
217 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
218 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
219 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
220 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
221 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
222 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO)
223
224#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
225 MS_NODEV | MS_SYNCHRONOUS)
226
227struct cifs_mnt_data {
228 struct cifs_sb_info *cifs_sb;
229 struct smb_vol *vol;
230 int flags;
231};
232
233struct TCP_Server_Info {
234 struct list_head tcp_ses_list;
235 struct list_head smb_ses_list;
236 int srv_count; /* reference counter */
237 /* 15 character server name + 0x20 16th byte indicating type = srv */
238 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
239 enum statusEnum tcpStatus; /* what we think the status is */
240 char *hostname; /* hostname portion of UNC string */
241 struct socket *ssocket;
242 struct sockaddr_storage dstaddr;
243 struct sockaddr_storage srcaddr; /* locally bind to this IP */
244#ifdef CONFIG_NET_NS
245 struct net *net;
246#endif
247 wait_queue_head_t response_q;
248 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
249 struct list_head pending_mid_q;
250 bool noblocksnd; /* use blocking sendmsg */
251 bool noautotune; /* do not autotune send buf sizes */
252 bool tcp_nodelay;
253 atomic_t inFlight; /* number of requests on the wire to server */
254 struct mutex srv_mutex;
255 struct task_struct *tsk;
256 char server_GUID[16];
257 char sec_mode;
258 bool session_estab; /* mark when very first sess is established */
259 u16 dialect; /* dialect index that server chose */
260 enum securityEnum secType;
261 unsigned int maxReq; /* Clients should submit no more */
262 /* than maxReq distinct unanswered SMBs to the server when using */
263 /* multiplexed reads or writes */
264 unsigned int maxBuf; /* maxBuf specifies the maximum */
265 /* message size the server can send or receive for non-raw SMBs */
266 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
267 /* when socket is setup (and during reconnect) before NegProt sent */
268 unsigned int max_rw; /* maxRw specifies the maximum */
269 /* message size the server can send or receive for */
270 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
271 unsigned int max_vcs; /* maximum number of smb sessions, at least
272 those that can be specified uniquely with
273 vcnumbers */
274 int capabilities; /* allow selective disabling of caps by smb sess */
275 int timeAdj; /* Adjust for difference in server time zone in sec */
276 __u16 CurrentMid; /* multiplex id - rotating counter */
277 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
278 /* 16th byte of RFC1001 workstation name is always null */
279 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
280 __u32 sequence_number; /* for signing, protected by srv_mutex */
281 struct session_key session_key;
282 unsigned long lstrp; /* when we got last response from this server */
283 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
284 /* extended security flavors that server supports */
285 bool sec_ntlmssp; /* supports NTLMSSP */
286 bool sec_kerberosu2u; /* supports U2U Kerberos */
287 bool sec_kerberos; /* supports plain Kerberos */
288 bool sec_mskerberos; /* supports legacy MS Kerberos */
289 struct delayed_work echo; /* echo ping workqueue job */
290#ifdef CONFIG_CIFS_FSCACHE
291 struct fscache_cookie *fscache; /* client index cache cookie */
292#endif
293#ifdef CONFIG_CIFS_STATS2
294 atomic_t in_send; /* requests trying to send */
295 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
296#endif
297};
298
299/*
300 * Macros to allow the TCP_Server_Info->net field and related code to drop out
301 * when CONFIG_NET_NS isn't set.
302 */
303
304#ifdef CONFIG_NET_NS
305
306static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
307{
308 return srv->net;
309}
310
311static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
312{
313 srv->net = net;
314}
315
316#else
317
318static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
319{
320 return &init_net;
321}
322
323static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
324{
325}
326
327#endif
328
329/*
330 * Session structure. One of these for each uid session with a particular host
331 */
332struct cifs_ses {
333 struct list_head smb_ses_list;
334 struct list_head tcon_list;
335 struct mutex session_mutex;
336 struct TCP_Server_Info *server; /* pointer to server info */
337 int ses_count; /* reference counter */
338 enum statusEnum status;
339 unsigned overrideSecFlg; /* if non-zero override global sec flags */
340 __u16 ipc_tid; /* special tid for connection to IPC share */
341 __u16 flags;
342 __u16 vcnum;
343 char *serverOS; /* name of operating system underlying server */
344 char *serverNOS; /* name of network operating system of server */
345 char *serverDomain; /* security realm of server */
346 int Suid; /* remote smb uid */
347 uid_t linux_uid; /* overriding owner of files on the mount */
348 uid_t cred_uid; /* owner of credentials */
349 int capabilities;
350 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
351 TCP names - will ipv6 and sctp addresses fit? */
352 char *user_name; /* must not be null except during init of sess
353 and after mount option parsing we fill it */
354 char *domainName;
355 char *password;
356 struct session_key auth_key;
357 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
358 bool need_reconnect:1; /* connection reset, uid now invalid */
359};
360/* no more than one of the following three session flags may be set */
361#define CIFS_SES_NT4 1
362#define CIFS_SES_OS2 2
363#define CIFS_SES_W9X 4
364/* following flag is set for old servers such as OS2 (and Win95?)
365 which do not negotiate NTLM or POSIX dialects, but instead
366 negotiate one of the older LANMAN dialects */
367#define CIFS_SES_LANMAN 8
368/*
369 * there is one of these for each connection to a resource on a particular
370 * session
371 */
372struct cifs_tcon {
373 struct list_head tcon_list;
374 int tc_count;
375 struct list_head openFileList;
376 struct cifs_ses *ses; /* pointer to session associated with */
377 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
378 char *nativeFileSystem;
379 char *password; /* for share-level security */
380 __u16 tid; /* The 2 byte tree id */
381 __u16 Flags; /* optional support bits */
382 enum statusEnum tidStatus;
383#ifdef CONFIG_CIFS_STATS
384 atomic_t num_smbs_sent;
385 atomic_t num_writes;
386 atomic_t num_reads;
387 atomic_t num_flushes;
388 atomic_t num_oplock_brks;
389 atomic_t num_opens;
390 atomic_t num_closes;
391 atomic_t num_deletes;
392 atomic_t num_mkdirs;
393 atomic_t num_posixopens;
394 atomic_t num_posixmkdirs;
395 atomic_t num_rmdirs;
396 atomic_t num_renames;
397 atomic_t num_t2renames;
398 atomic_t num_ffirst;
399 atomic_t num_fnext;
400 atomic_t num_fclose;
401 atomic_t num_hardlinks;
402 atomic_t num_symlinks;
403 atomic_t num_locks;
404 atomic_t num_acl_get;
405 atomic_t num_acl_set;
406#ifdef CONFIG_CIFS_STATS2
407 unsigned long long time_writes;
408 unsigned long long time_reads;
409 unsigned long long time_opens;
410 unsigned long long time_deletes;
411 unsigned long long time_closes;
412 unsigned long long time_mkdirs;
413 unsigned long long time_rmdirs;
414 unsigned long long time_renames;
415 unsigned long long time_t2renames;
416 unsigned long long time_ffirst;
417 unsigned long long time_fnext;
418 unsigned long long time_fclose;
419#endif /* CONFIG_CIFS_STATS2 */
420 __u64 bytes_read;
421 __u64 bytes_written;
422 spinlock_t stat_lock;
423#endif /* CONFIG_CIFS_STATS */
424 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
425 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
426 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
427 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
428 bool retry:1;
429 bool nocase:1;
430 bool seal:1; /* transport encryption for this mounted share */
431 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
432 for this mount even if server would support */
433 bool local_lease:1; /* check leases (only) on local system not remote */
434 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
435 bool need_reconnect:1; /* connection reset, tid now invalid */
436#ifdef CONFIG_CIFS_FSCACHE
437 u64 resource_id; /* server resource id */
438 struct fscache_cookie *fscache; /* cookie for share */
439#endif
440 /* BB add field for back pointer to sb struct(s)? */
441};
442
443/*
444 * This is a refcounted and timestamped container for a tcon pointer. The
445 * container holds a tcon reference. It is considered safe to free one of
446 * these when the tl_count goes to 0. The tl_time is the time of the last
447 * "get" on the container.
448 */
449struct tcon_link {
450 struct rb_node tl_rbnode;
451 uid_t tl_uid;
452 unsigned long tl_flags;
453#define TCON_LINK_MASTER 0
454#define TCON_LINK_PENDING 1
455#define TCON_LINK_IN_TREE 2
456 unsigned long tl_time;
457 atomic_t tl_count;
458 struct cifs_tcon *tl_tcon;
459};
460
461extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
462
463static inline struct cifs_tcon *
464tlink_tcon(struct tcon_link *tlink)
465{
466 return tlink->tl_tcon;
467}
468
469extern void cifs_put_tlink(struct tcon_link *tlink);
470
471static inline struct tcon_link *
472cifs_get_tlink(struct tcon_link *tlink)
473{
474 if (tlink && !IS_ERR(tlink))
475 atomic_inc(&tlink->tl_count);
476 return tlink;
477}
478
479/* This function is always expected to succeed */
480extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
481
482/*
483 * This info hangs off the cifsFileInfo structure, pointed to by llist.
484 * This is used to track byte stream locks on the file
485 */
486struct cifsLockInfo {
487 struct list_head llist; /* pointer to next cifsLockInfo */
488 __u64 offset;
489 __u64 length;
490 __u8 type;
491};
492
493/*
494 * One of these for each open instance of a file
495 */
496struct cifs_search_info {
497 loff_t index_of_last_entry;
498 __u16 entries_in_buffer;
499 __u16 info_level;
500 __u32 resume_key;
501 char *ntwrk_buf_start;
502 char *srch_entries_start;
503 char *last_entry;
504 const char *presume_name;
505 unsigned int resume_name_len;
506 bool endOfSearch:1;
507 bool emptyDir:1;
508 bool unicode:1;
509 bool smallBuf:1; /* so we know which buf_release function to call */
510};
511
512struct cifsFileInfo {
513 struct list_head tlist; /* pointer to next fid owned by tcon */
514 struct list_head flist; /* next fid (file instance) for this inode */
515 unsigned int uid; /* allows finding which FileInfo structure */
516 __u32 pid; /* process id who opened file */
517 __u16 netfid; /* file id from remote */
518 /* BB add lock scope info here if needed */ ;
519 /* lock scope id (0 if none) */
520 struct dentry *dentry;
521 unsigned int f_flags;
522 struct tcon_link *tlink;
523 struct mutex lock_mutex;
524 struct list_head llist; /* list of byte range locks we have. */
525 bool invalidHandle:1; /* file closed via session abend */
526 bool oplock_break_cancelled:1;
527 int count; /* refcount protected by cifs_file_list_lock */
528 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
529 struct cifs_search_info srch_inf;
530 struct work_struct oplock_break; /* work for oplock breaks */
531};
532
533struct cifs_io_parms {
534 __u16 netfid;
535 __u32 pid;
536 __u64 offset;
537 unsigned int length;
538 struct cifs_tcon *tcon;
539};
540
541/*
542 * Take a reference on the file private data. Must be called with
543 * cifs_file_list_lock held.
544 */
545static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
546{
547 ++cifs_file->count;
548}
549
550void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
551
552/*
553 * One of these for each file inode
554 */
555
556struct cifsInodeInfo {
557 struct list_head lockList;
558 /* BB add in lists for dirty pages i.e. write caching info for oplock */
559 struct list_head openFileList;
560 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
561 bool clientCanCacheRead; /* read oplock */
562 bool clientCanCacheAll; /* read and writebehind oplock */
563 bool delete_pending; /* DELETE_ON_CLOSE is set */
564 bool invalid_mapping; /* pagecache is invalid */
565 unsigned long time; /* jiffies of last update of inode */
566 u64 server_eof; /* current file size on server */
567 u64 uniqueid; /* server inode number */
568 u64 createtime; /* creation time on server */
569#ifdef CONFIG_CIFS_FSCACHE
570 struct fscache_cookie *fscache;
571#endif
572 struct inode vfs_inode;
573};
574
575static inline struct cifsInodeInfo *
576CIFS_I(struct inode *inode)
577{
578 return container_of(inode, struct cifsInodeInfo, vfs_inode);
579}
580
581static inline struct cifs_sb_info *
582CIFS_SB(struct super_block *sb)
583{
584 return sb->s_fs_info;
585}
586
587static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
588{
589 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
590 return '/';
591 else
592 return '\\';
593}
594
595static inline void
596convert_delimiter(char *path, char delim)
597{
598 int i;
599 char old_delim;
600
601 if (path == NULL)
602 return;
603
604 if (delim == '/')
605 old_delim = '\\';
606 else
607 old_delim = '/';
608
609 for (i = 0; path[i] != '\0'; i++) {
610 if (path[i] == old_delim)
611 path[i] = delim;
612 }
613}
614
615#ifdef CONFIG_CIFS_STATS
616#define cifs_stats_inc atomic_inc
617
618static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
619 unsigned int bytes)
620{
621 if (bytes) {
622 spin_lock(&tcon->stat_lock);
623 tcon->bytes_written += bytes;
624 spin_unlock(&tcon->stat_lock);
625 }
626}
627
628static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
629 unsigned int bytes)
630{
631 spin_lock(&tcon->stat_lock);
632 tcon->bytes_read += bytes;
633 spin_unlock(&tcon->stat_lock);
634}
635#else
636
637#define cifs_stats_inc(field) do {} while (0)
638#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
639#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
640
641#endif
642
643struct mid_q_entry;
644
645/*
646 * This is the prototype for the mid callback function. When creating one,
647 * take special care to avoid deadlocks. Things to bear in mind:
648 *
649 * - it will be called by cifsd, with no locks held
650 * - the mid will be removed from any lists
651 */
652typedef void (mid_callback_t)(struct mid_q_entry *mid);
653
654/* one of these for every pending CIFS request to the server */
655struct mid_q_entry {
656 struct list_head qhead; /* mids waiting on reply from this server */
657 __u16 mid; /* multiplex id */
658 __u16 pid; /* process id */
659 __u32 sequence_number; /* for CIFS signing */
660 unsigned long when_alloc; /* when mid was created */
661#ifdef CONFIG_CIFS_STATS2
662 unsigned long when_sent; /* time when smb send finished */
663 unsigned long when_received; /* when demux complete (taken off wire) */
664#endif
665 mid_callback_t *callback; /* call completion callback */
666 void *callback_data; /* general purpose pointer for callback */
667 struct smb_hdr *resp_buf; /* response buffer */
668 int midState; /* wish this were enum but can not pass to wait_event */
669 __u8 command; /* smb command code */
670 bool largeBuf:1; /* if valid response, is pointer to large buf */
671 bool multiRsp:1; /* multiple trans2 responses for one request */
672 bool multiEnd:1; /* both received */
673};
674
675/* Make code in transport.c a little cleaner by moving
676 update of optional stats into function below */
677#ifdef CONFIG_CIFS_STATS2
678
679static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
680{
681 atomic_inc(&server->in_send);
682}
683
684static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
685{
686 atomic_dec(&server->in_send);
687}
688
689static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
690{
691 atomic_inc(&server->num_waiters);
692}
693
694static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
695{
696 atomic_dec(&server->num_waiters);
697}
698
699static inline void cifs_save_when_sent(struct mid_q_entry *mid)
700{
701 mid->when_sent = jiffies;
702}
703#else
704static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
705{
706}
707static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
708{
709}
710
711static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
712{
713}
714
715static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
716{
717}
718
719static inline void cifs_save_when_sent(struct mid_q_entry *mid)
720{
721}
722#endif
723
724/* for pending dnotify requests */
725struct dir_notify_req {
726 struct list_head lhead;
727 __le16 Pid;
728 __le16 PidHigh;
729 __u16 Mid;
730 __u16 Tid;
731 __u16 Uid;
732 __u16 netfid;
733 __u32 filter; /* CompletionFilter (for multishot) */
734 int multishot;
735 struct file *pfile;
736};
737
738struct dfs_info3_param {
739 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
740 int path_consumed;
741 int server_type;
742 int ref_flag;
743 char *path_name;
744 char *node_name;
745};
746
747/*
748 * common struct for holding inode info when searching for or updating an
749 * inode with new info
750 */
751
752#define CIFS_FATTR_DFS_REFERRAL 0x1
753#define CIFS_FATTR_DELETE_PENDING 0x2
754#define CIFS_FATTR_NEED_REVAL 0x4
755#define CIFS_FATTR_INO_COLLISION 0x8
756
757struct cifs_fattr {
758 u32 cf_flags;
759 u32 cf_cifsattrs;
760 u64 cf_uniqueid;
761 u64 cf_eof;
762 u64 cf_bytes;
763 u64 cf_createtime;
764 uid_t cf_uid;
765 gid_t cf_gid;
766 umode_t cf_mode;
767 dev_t cf_rdev;
768 unsigned int cf_nlink;
769 unsigned int cf_dtype;
770 struct timespec cf_atime;
771 struct timespec cf_mtime;
772 struct timespec cf_ctime;
773};
774
775static inline void free_dfs_info_param(struct dfs_info3_param *param)
776{
777 if (param) {
778 kfree(param->path_name);
779 kfree(param->node_name);
780 kfree(param);
781 }
782}
783
784static inline void free_dfs_info_array(struct dfs_info3_param *param,
785 int number_of_items)
786{
787 int i;
788 if ((number_of_items == 0) || (param == NULL))
789 return;
790 for (i = 0; i < number_of_items; i++) {
791 kfree(param[i].path_name);
792 kfree(param[i].node_name);
793 }
794 kfree(param);
795}
796
797#define MID_FREE 0
798#define MID_REQUEST_ALLOCATED 1
799#define MID_REQUEST_SUBMITTED 2
800#define MID_RESPONSE_RECEIVED 4
801#define MID_RETRY_NEEDED 8 /* session closed while this request out */
802#define MID_RESPONSE_MALFORMED 0x10
803#define MID_SHUTDOWN 0x20
804
805/* Types of response buffer returned from SendReceive2 */
806#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
807#define CIFS_SMALL_BUFFER 1
808#define CIFS_LARGE_BUFFER 2
809#define CIFS_IOVEC 4 /* array of response buffers */
810
811/* Type of Request to SendReceive2 */
812#define CIFS_BLOCKING_OP 1 /* operation can block */
813#define CIFS_ASYNC_OP 2 /* do not wait for response */
814#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
815#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
816#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
817#define CIFS_NO_RESP 0x040 /* no response buffer required */
818
819/* Security Flags: indicate type of session setup needed */
820#define CIFSSEC_MAY_SIGN 0x00001
821#define CIFSSEC_MAY_NTLM 0x00002
822#define CIFSSEC_MAY_NTLMV2 0x00004
823#define CIFSSEC_MAY_KRB5 0x00008
824#ifdef CONFIG_CIFS_WEAK_PW_HASH
825#define CIFSSEC_MAY_LANMAN 0x00010
826#define CIFSSEC_MAY_PLNTXT 0x00020
827#else
828#define CIFSSEC_MAY_LANMAN 0
829#define CIFSSEC_MAY_PLNTXT 0
830#endif /* weak passwords */
831#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
832#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
833
834#define CIFSSEC_MUST_SIGN 0x01001
835/* note that only one of the following can be set so the
836result of setting MUST flags more than once will be to
837require use of the stronger protocol */
838#define CIFSSEC_MUST_NTLM 0x02002
839#define CIFSSEC_MUST_NTLMV2 0x04004
840#define CIFSSEC_MUST_KRB5 0x08008
841#ifdef CONFIG_CIFS_WEAK_PW_HASH
842#define CIFSSEC_MUST_LANMAN 0x10010
843#define CIFSSEC_MUST_PLNTXT 0x20020
844#ifdef CONFIG_CIFS_UPCALL
845#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
846#else
847#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
848#endif /* UPCALL */
849#else /* do not allow weak pw hash */
850#ifdef CONFIG_CIFS_UPCALL
851#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
852#else
853#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
854#endif /* UPCALL */
855#endif /* WEAK_PW_HASH */
856#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
857#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
858
859#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
860#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
861#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
862/*
863 *****************************************************************
864 * All constants go here
865 *****************************************************************
866 */
867
868#define UID_HASH (16)
869
870/*
871 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
872 * following to be declared.
873 */
874
875/****************************************************************************
876 * Locking notes. All updates to global variables and lists should be
877 * protected by spinlocks or semaphores.
878 *
879 * Spinlocks
880 * ---------
881 * GlobalMid_Lock protects:
882 * list operations on pending_mid_q and oplockQ
883 * updates to XID counters, multiplex id and SMB sequence numbers
884 * cifs_file_list_lock protects:
885 * list operations on tcp and SMB session lists and tCon lists
886 * f_owner.lock protects certain per file struct operations
887 * mapping->page_lock protects certain per page operations
888 *
889 * Semaphores
890 * ----------
891 * sesSem operations on smb session
892 * tconSem operations on tree connection
893 * fh_sem file handle reconnection operations
894 *
895 ****************************************************************************/
896
897#ifdef DECLARE_GLOBALS_HERE
898#define GLOBAL_EXTERN
899#else
900#define GLOBAL_EXTERN extern
901#endif
902
903/*
904 * the list of TCP_Server_Info structures, ie each of the sockets
905 * connecting our client to a distinct server (ip address), is
906 * chained together by cifs_tcp_ses_list. The list of all our SMB
907 * sessions (and from that the tree connections) can be found
908 * by iterating over cifs_tcp_ses_list
909 */
910GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
911
912/*
913 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
914 * tcp session, and the list of tcon's per smb session. It also protects
915 * the reference counters for the server, smb session, and tcon. Finally,
916 * changes to the tcon->tidStatus should be done while holding this lock.
917 */
918GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
919
920/*
921 * This lock protects the cifs_file->llist and cifs_file->flist
922 * list operations, and updates to some flags (cifs_file->invalidHandle)
923 * It will be moved to either use the tcon->stat_lock or equivalent later.
924 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
925 * the cifs_tcp_ses_lock must be grabbed first and released last.
926 */
927GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
928
929#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
930/* Outstanding dir notify requests */
931GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
932/* DirNotify response queue */
933GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
934#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
935
936/*
937 * Global transaction id (XID) information
938 */
939GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
940GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
941GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
942GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
943 /* on midQ entries */
944/*
945 * Global counters, updated atomically
946 */
947GLOBAL_EXTERN atomic_t sesInfoAllocCount;
948GLOBAL_EXTERN atomic_t tconInfoAllocCount;
949GLOBAL_EXTERN atomic_t tcpSesAllocCount;
950GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
951GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
952
953/* Various Debug counters */
954GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
955#ifdef CONFIG_CIFS_STATS2
956GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
957GLOBAL_EXTERN atomic_t totSmBufAllocCount;
958#endif
959GLOBAL_EXTERN atomic_t smBufAllocCount;
960GLOBAL_EXTERN atomic_t midCount;
961
962/* Misc globals */
963GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
964 to be established on existing mount if we
965 have the uid/password or Kerberos credential
966 or equivalent for current user */
967GLOBAL_EXTERN unsigned int oplockEnabled;
968GLOBAL_EXTERN unsigned int lookupCacheEnabled;
969GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
970 with more secure ntlmssp2 challenge/resp */
971GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
972GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
973GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
974GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
975GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
976GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
977
978/* reconnect after this many failed echo attempts */
979GLOBAL_EXTERN unsigned short echo_retries;
980
981GLOBAL_EXTERN struct rb_root uidtree;
982GLOBAL_EXTERN struct rb_root gidtree;
983GLOBAL_EXTERN spinlock_t siduidlock;
984GLOBAL_EXTERN spinlock_t sidgidlock;
985
986void cifs_oplock_break(struct work_struct *work);
987
988extern const struct slow_work_ops cifs_oplock_break_ops;
989
990#endif /* _CIFS_GLOB_H */
1/*
2 * fs/cifs/cifsglob.h
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
7 *
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.
12 *
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.
17 *
18 */
19#ifndef _CIFS_GLOB_H
20#define _CIFS_GLOB_H
21
22#include <linux/in.h>
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"
28#include "cifsacl.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
33#include "smb2pdu.h"
34#endif
35
36#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
37
38/*
39 * The sizes of various internal tables and strings
40 */
41#define MAX_UID_INFO 16
42#define MAX_SES_INFO 2
43#define MAX_TCON_INFO 4
44
45#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
46
47#define CIFS_MIN_RCV_POOL 4
48
49#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
50/*
51 * default attribute cache timeout (jiffies)
52 */
53#define CIFS_DEF_ACTIMEO (1 * HZ)
54
55/*
56 * max attribute cache timeout (jiffies) - 2^30
57 */
58#define CIFS_MAX_ACTIMEO (1 << 30)
59
60/*
61 * MAX_REQ is the maximum number of requests that WE will send
62 * on one socket concurrently.
63 */
64#define CIFS_MAX_REQ 32767
65
66#define RFC1001_NAME_LEN 15
67#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
68
69/* currently length of NIP6_FMT */
70#define SERVER_NAME_LENGTH 40
71#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
72
73/* used to define string lengths for reversing unicode strings */
74/* (256+1)*2 = 514 */
75/* (max path length + 1 for null) * 2 for unicode */
76#define MAX_NAME 514
77
78/* SMB echo "timeout" -- FIXME: tunable? */
79#define SMB_ECHO_INTERVAL (60 * HZ)
80
81#include "cifspdu.h"
82
83#ifndef XATTR_DOS_ATTRIB
84#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
85#endif
86
87/*
88 * CIFS vfs client Status information (based on what we know.)
89 */
90
91/* associated with each tcp and smb session */
92enum statusEnum {
93 CifsNew = 0,
94 CifsGood,
95 CifsExiting,
96 CifsNeedReconnect,
97 CifsNeedNegotiate
98};
99
100enum securityEnum {
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 */
107};
108
109struct session_key {
110 unsigned int len;
111 char *response;
112};
113
114/* crypto security descriptor definition */
115struct sdesc {
116 struct shash_desc shash;
117 char ctx[];
118};
119
120/* crypto hashing related structure/fields, not specific to a sec mech */
121struct 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 */
130};
131
132/* per smb session structure/fields */
133struct 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 */
139};
140
141struct cifs_cred {
142 int uid;
143 int gid;
144 int mode;
145 int cecount;
146 struct cifs_sid osid;
147 struct cifs_sid gsid;
148 struct cifs_ntace *ntaces;
149 struct cifs_ace *aces;
150};
151
152/*
153 *****************************************************************
154 * Except the CIFS PDUs themselves all the
155 * globally interesting structs should go here
156 *****************************************************************
157 */
158
159/*
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.
163 */
164struct smb_rqst {
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 */
171};
172
173enum smb_version {
174 Smb_1 = 1,
175 Smb_20,
176 Smb_21,
177 Smb_30,
178 Smb_302,
179};
180
181struct mid_q_entry;
182struct TCP_Server_Info;
183struct cifsFileInfo;
184struct cifs_ses;
185struct cifs_tcon;
186struct dfs_info3_param;
187struct cifs_fattr;
188struct smb_vol;
189struct cifs_fid;
190struct cifs_readdata;
191struct cifs_writedata;
192struct cifs_io_parms;
193struct cifs_search_info;
194struct cifsInodeInfo;
195struct cifs_open_parms;
196
197struct 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 *,
203 struct smb_rqst *);
204 /* setup async request: allocate mid, sign message */
205 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
206 struct smb_rqst *);
207 /* check response: verify signature, map error */
208 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
209 bool);
210 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
211 const 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 *,
235 char *, int);
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);
280 /* set attributes */
281 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
282 const unsigned int);
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 *,
295 const unsigned int);
296 /* remove directory */
297 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
298 struct cifs_sb_info *);
299 /* unlink file */
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 *,
304 const unsigned int);
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);
320 /* close a file */
321 void (*close)(const unsigned int, struct cifs_tcon *,
322 struct cifs_fid *);
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 **,
333 int *);
334 /* sync write to the server */
335 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
336 struct cifs_io_parms *, unsigned int *, struct kvec *,
337 unsigned long);
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 *,
345 struct cifs_fid *,
346 __u16, struct cifs_search_info *srch_inf);
347 /* close dir */
348 int (*close_dir)(const unsigned int, struct cifs_tcon *,
349 struct cifs_fid *);
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 *,
359 struct kstatfs *);
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 *,
365 const unsigned int);
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,
386 bool *);
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,
393 u64 dest_off);
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 *,
406 int);
407};
408
409struct smb_version_values {
410 char *version_string;
411 __u16 protocol_id;
412 __u32 req_capabilities;
413 __u32 large_lock_type;
414 __u32 exclusive_lock_type;
415 __u32 shared_lock_type;
416 __u32 unlock_lock_type;
417 size_t header_size;
418 size_t max_header_size;
419 size_t read_rsp_size;
420 __le16 lock_cmd;
421 unsigned int cap_unix;
422 unsigned int cap_nt_find;
423 unsigned int cap_large_files;
424 __u16 signing_enabled;
425 __u16 signing_required;
426 size_t create_lease_size;
427};
428
429#define HEADER_SIZE(server) (server->vals->header_size)
430#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
431
432struct smb_vol {
433 char *username;
434 char *password;
435 char *domainname;
436 char *UNC;
437 char *iocharset; /* local code page for mapping to and from Unicode */
438 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
439 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
440 kuid_t cred_uid;
441 kuid_t linux_uid;
442 kgid_t linux_gid;
443 kuid_t backupuid;
444 kgid_t backupgid;
445 umode_t file_mode;
446 umode_t dir_mode;
447 enum securityEnum sectype; /* sectype requested via mnt opts */
448 bool sign; /* was signing requested via mnt opts? */
449 bool retry:1;
450 bool intr:1;
451 bool setuids:1;
452 bool override_uid:1;
453 bool override_gid:1;
454 bool dynperm:1;
455 bool noperm:1;
456 bool no_psx_acl:1; /* set if posix acl support should be disabled */
457 bool cifs_acl:1;
458 bool backupuid_specified; /* mount option backupuid is specified */
459 bool backupgid_specified; /* mount option backupgid is specified */
460 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
461 bool server_ino:1; /* use inode numbers from server ie UniqueId */
462 bool direct_io:1;
463 bool strict_io:1; /* strict cache behavior */
464 bool remap:1; /* set to remap seven reserved chars in filenames */
465 bool posix_paths:1; /* unset to not ask for posix pathnames. */
466 bool no_linux_ext:1;
467 bool sfu_emul:1;
468 bool nullauth:1; /* attempt to authenticate with null user */
469 bool nocase:1; /* request case insensitive filenames */
470 bool nobrl:1; /* disable sending byte range locks to srv */
471 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
472 bool seal:1; /* request transport encryption on share */
473 bool nodfs:1; /* Do not request DFS, even if available */
474 bool local_lease:1; /* check leases only on local system, not remote */
475 bool noblocksnd:1;
476 bool noautotune:1;
477 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
478 bool fsc:1; /* enable fscache */
479 bool mfsymlinks:1; /* use Minshall+French Symlinks */
480 bool multiuser:1;
481 bool rwpidforward:1; /* pid forward for read/write operations */
482 bool nosharesock;
483 unsigned int rsize;
484 unsigned int wsize;
485 bool sockopt_tcp_nodelay:1;
486 unsigned long actimeo; /* attribute cache timeout (jiffies) */
487 struct smb_version_operations *ops;
488 struct smb_version_values *vals;
489 char *prepath;
490 struct sockaddr_storage dstaddr; /* destination address */
491 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
492 struct nls_table *local_nls;
493};
494
495#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
496 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
497 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
498 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
499 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
500 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
501 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
502 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
503 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
504 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
505
506#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
507 MS_NODEV | MS_SYNCHRONOUS)
508
509struct cifs_mnt_data {
510 struct cifs_sb_info *cifs_sb;
511 struct smb_vol *vol;
512 int flags;
513};
514
515static inline unsigned int
516get_rfc1002_length(void *buf)
517{
518 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
519}
520
521static inline void
522inc_rfc1001_len(void *buf, int count)
523{
524 be32_add_cpu((__be32 *)buf, count);
525}
526
527struct TCP_Server_Info {
528 struct list_head tcp_ses_list;
529 struct list_head smb_ses_list;
530 int srv_count; /* reference counter */
531 /* 15 character server name + 0x20 16th byte indicating type = srv */
532 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
533 struct smb_version_operations *ops;
534 struct smb_version_values *vals;
535 enum statusEnum tcpStatus; /* what we think the status is */
536 char *hostname; /* hostname portion of UNC string */
537 struct socket *ssocket;
538 struct sockaddr_storage dstaddr;
539 struct sockaddr_storage srcaddr; /* locally bind to this IP */
540#ifdef CONFIG_NET_NS
541 struct net *net;
542#endif
543 wait_queue_head_t response_q;
544 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
545 struct list_head pending_mid_q;
546 bool noblocksnd; /* use blocking sendmsg */
547 bool noautotune; /* do not autotune send buf sizes */
548 bool tcp_nodelay;
549 int credits; /* send no more requests at once */
550 unsigned int in_flight; /* number of requests on the wire to server */
551 spinlock_t req_lock; /* protect the two values above */
552 struct mutex srv_mutex;
553 struct task_struct *tsk;
554 char server_GUID[16];
555 __u16 sec_mode;
556 bool sign; /* is signing enabled on this connection? */
557 bool session_estab; /* mark when very first sess is established */
558#ifdef CONFIG_CIFS_SMB2
559 int echo_credits; /* echo reserved slots */
560 int oplock_credits; /* oplock break reserved slots */
561 bool echoes:1; /* enable echoes */
562#endif
563 u16 dialect; /* dialect index that server chose */
564 bool oplocks:1; /* enable oplocks */
565 unsigned int maxReq; /* Clients should submit no more */
566 /* than maxReq distinct unanswered SMBs to the server when using */
567 /* multiplexed reads or writes */
568 unsigned int maxBuf; /* maxBuf specifies the maximum */
569 /* message size the server can send or receive for non-raw SMBs */
570 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
571 /* when socket is setup (and during reconnect) before NegProt sent */
572 unsigned int max_rw; /* maxRw specifies the maximum */
573 /* message size the server can send or receive for */
574 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
575 unsigned int capabilities; /* selective disabling of caps by smb sess */
576 int timeAdj; /* Adjust for difference in server time zone in sec */
577 __u64 CurrentMid; /* multiplex id - rotating counter */
578 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
579 /* 16th byte of RFC1001 workstation name is always null */
580 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
581 __u32 sequence_number; /* for signing, protected by srv_mutex */
582 struct session_key session_key;
583 unsigned long lstrp; /* when we got last response from this server */
584 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
585#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
586#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
587#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
588 char negflavor; /* NEGOTIATE response flavor */
589 /* extended security flavors that server supports */
590 bool sec_ntlmssp; /* supports NTLMSSP */
591 bool sec_kerberosu2u; /* supports U2U Kerberos */
592 bool sec_kerberos; /* supports plain Kerberos */
593 bool sec_mskerberos; /* supports legacy MS Kerberos */
594 bool large_buf; /* is current buffer large? */
595 struct delayed_work echo; /* echo ping workqueue job */
596 struct kvec *iov; /* reusable kvec array for receives */
597 unsigned int nr_iov; /* number of kvecs in array */
598 char *smallbuf; /* pointer to current "small" buffer */
599 char *bigbuf; /* pointer to current "big" buffer */
600 unsigned int total_read; /* total amount of data read in this pass */
601#ifdef CONFIG_CIFS_FSCACHE
602 struct fscache_cookie *fscache; /* client index cache cookie */
603#endif
604#ifdef CONFIG_CIFS_STATS2
605 atomic_t in_send; /* requests trying to send */
606 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
607#endif
608#ifdef CONFIG_CIFS_SMB2
609 unsigned int max_read;
610 unsigned int max_write;
611#endif /* CONFIG_CIFS_SMB2 */
612};
613
614static inline unsigned int
615in_flight(struct TCP_Server_Info *server)
616{
617 unsigned int num;
618 spin_lock(&server->req_lock);
619 num = server->in_flight;
620 spin_unlock(&server->req_lock);
621 return num;
622}
623
624static inline bool
625has_credits(struct TCP_Server_Info *server, int *credits)
626{
627 int num;
628 spin_lock(&server->req_lock);
629 num = *credits;
630 spin_unlock(&server->req_lock);
631 return num > 0;
632}
633
634static inline void
635add_credits(struct TCP_Server_Info *server, const unsigned int add,
636 const int optype)
637{
638 server->ops->add_credits(server, add, optype);
639}
640
641static inline void
642set_credits(struct TCP_Server_Info *server, const int val)
643{
644 server->ops->set_credits(server, val);
645}
646
647static inline __u64
648get_next_mid64(struct TCP_Server_Info *server)
649{
650 return server->ops->get_next_mid(server);
651}
652
653static inline __le16
654get_next_mid(struct TCP_Server_Info *server)
655{
656 __u16 mid = get_next_mid64(server);
657 /*
658 * The value in the SMB header should be little endian for easy
659 * on-the-wire decoding.
660 */
661 return cpu_to_le16(mid);
662}
663
664static inline __u16
665get_mid(const struct smb_hdr *smb)
666{
667 return le16_to_cpu(smb->Mid);
668}
669
670static inline bool
671compare_mid(__u16 mid, const struct smb_hdr *smb)
672{
673 return mid == le16_to_cpu(smb->Mid);
674}
675
676/*
677 * When the server supports very large reads and writes via POSIX extensions,
678 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
679 * including the RFC1001 length.
680 *
681 * Note that this might make for "interesting" allocation problems during
682 * writeback however as we have to allocate an array of pointers for the
683 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
684 *
685 * For reads, there is a similar problem as we need to allocate an array
686 * of kvecs to handle the receive, though that should only need to be done
687 * once.
688 */
689#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
690#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
691
692/*
693 * When the server doesn't allow large posix writes, only allow a rsize/wsize
694 * of 2^17-1 minus the size of the call header. That allows for a read or
695 * write up to the maximum size described by RFC1002.
696 */
697#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
698#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
699
700/*
701 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
702 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
703 * a single wsize request with a single call.
704 */
705#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
706
707/*
708 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
709 * those values when posix extensions aren't in force. In actuality here, we
710 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
711 * to be ok with the extra byte even though Windows doesn't send writes that
712 * are that large.
713 *
714 * Citation:
715 *
716 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
717 */
718#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
719#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
720
721/*
722 * Macros to allow the TCP_Server_Info->net field and related code to drop out
723 * when CONFIG_NET_NS isn't set.
724 */
725
726#ifdef CONFIG_NET_NS
727
728static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
729{
730 return srv->net;
731}
732
733static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
734{
735 srv->net = net;
736}
737
738#else
739
740static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
741{
742 return &init_net;
743}
744
745static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
746{
747}
748
749#endif
750
751/*
752 * Session structure. One of these for each uid session with a particular host
753 */
754struct cifs_ses {
755 struct list_head smb_ses_list;
756 struct list_head tcon_list;
757 struct mutex session_mutex;
758 struct TCP_Server_Info *server; /* pointer to server info */
759 int ses_count; /* reference counter */
760 enum statusEnum status;
761 unsigned overrideSecFlg; /* if non-zero override global sec flags */
762 __u16 ipc_tid; /* special tid for connection to IPC share */
763 char *serverOS; /* name of operating system underlying server */
764 char *serverNOS; /* name of network operating system of server */
765 char *serverDomain; /* security realm of server */
766 __u64 Suid; /* remote smb uid */
767 kuid_t linux_uid; /* overriding owner of files on the mount */
768 kuid_t cred_uid; /* owner of credentials */
769 unsigned int capabilities;
770 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
771 TCP names - will ipv6 and sctp addresses fit? */
772 char *user_name; /* must not be null except during init of sess
773 and after mount option parsing we fill it */
774 char *domainName;
775 char *password;
776 struct session_key auth_key;
777 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
778 enum securityEnum sectype; /* what security flavor was specified? */
779 bool sign; /* is signing required? */
780 bool need_reconnect:1; /* connection reset, uid now invalid */
781#ifdef CONFIG_CIFS_SMB2
782 __u16 session_flags;
783 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
784#endif /* CONFIG_CIFS_SMB2 */
785};
786
787static inline bool
788cap_unix(struct cifs_ses *ses)
789{
790 return ses->server->vals->cap_unix & ses->capabilities;
791}
792
793/*
794 * there is one of these for each connection to a resource on a particular
795 * session
796 */
797struct cifs_tcon {
798 struct list_head tcon_list;
799 int tc_count;
800 struct list_head openFileList;
801 struct cifs_ses *ses; /* pointer to session associated with */
802 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
803 char *nativeFileSystem;
804 char *password; /* for share-level security */
805 __u32 tid; /* The 4 byte tree id */
806 __u16 Flags; /* optional support bits */
807 enum statusEnum tidStatus;
808#ifdef CONFIG_CIFS_STATS
809 atomic_t num_smbs_sent;
810 union {
811 struct {
812 atomic_t num_writes;
813 atomic_t num_reads;
814 atomic_t num_flushes;
815 atomic_t num_oplock_brks;
816 atomic_t num_opens;
817 atomic_t num_closes;
818 atomic_t num_deletes;
819 atomic_t num_mkdirs;
820 atomic_t num_posixopens;
821 atomic_t num_posixmkdirs;
822 atomic_t num_rmdirs;
823 atomic_t num_renames;
824 atomic_t num_t2renames;
825 atomic_t num_ffirst;
826 atomic_t num_fnext;
827 atomic_t num_fclose;
828 atomic_t num_hardlinks;
829 atomic_t num_symlinks;
830 atomic_t num_locks;
831 atomic_t num_acl_get;
832 atomic_t num_acl_set;
833 } cifs_stats;
834#ifdef CONFIG_CIFS_SMB2
835 struct {
836 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
837 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
838 } smb2_stats;
839#endif /* CONFIG_CIFS_SMB2 */
840 } stats;
841#ifdef CONFIG_CIFS_STATS2
842 unsigned long long time_writes;
843 unsigned long long time_reads;
844 unsigned long long time_opens;
845 unsigned long long time_deletes;
846 unsigned long long time_closes;
847 unsigned long long time_mkdirs;
848 unsigned long long time_rmdirs;
849 unsigned long long time_renames;
850 unsigned long long time_t2renames;
851 unsigned long long time_ffirst;
852 unsigned long long time_fnext;
853 unsigned long long time_fclose;
854#endif /* CONFIG_CIFS_STATS2 */
855 __u64 bytes_read;
856 __u64 bytes_written;
857 spinlock_t stat_lock;
858#endif /* CONFIG_CIFS_STATS */
859 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
860 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
861 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
862 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
863 bool retry:1;
864 bool nocase:1;
865 bool seal:1; /* transport encryption for this mounted share */
866 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
867 for this mount even if server would support */
868 bool local_lease:1; /* check leases (only) on local system not remote */
869 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
870 bool need_reconnect:1; /* connection reset, tid now invalid */
871#ifdef CONFIG_CIFS_SMB2
872 bool print:1; /* set if connection to printer share */
873 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
874 __le32 capabilities;
875 __u32 share_flags;
876 __u32 maximal_access;
877 __u32 vol_serial_number;
878 __le64 vol_create_time;
879 __u32 ss_flags; /* sector size flags */
880 __u32 perf_sector_size; /* best sector size for perf */
881 __u32 max_chunks;
882 __u32 max_bytes_chunk;
883 __u32 max_bytes_copy;
884#endif /* CONFIG_CIFS_SMB2 */
885#ifdef CONFIG_CIFS_FSCACHE
886 u64 resource_id; /* server resource id */
887 struct fscache_cookie *fscache; /* cookie for share */
888#endif
889 struct list_head pending_opens; /* list of incomplete opens */
890 /* BB add field for back pointer to sb struct(s)? */
891};
892
893/*
894 * This is a refcounted and timestamped container for a tcon pointer. The
895 * container holds a tcon reference. It is considered safe to free one of
896 * these when the tl_count goes to 0. The tl_time is the time of the last
897 * "get" on the container.
898 */
899struct tcon_link {
900 struct rb_node tl_rbnode;
901 kuid_t tl_uid;
902 unsigned long tl_flags;
903#define TCON_LINK_MASTER 0
904#define TCON_LINK_PENDING 1
905#define TCON_LINK_IN_TREE 2
906 unsigned long tl_time;
907 atomic_t tl_count;
908 struct cifs_tcon *tl_tcon;
909};
910
911extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
912
913static inline struct cifs_tcon *
914tlink_tcon(struct tcon_link *tlink)
915{
916 return tlink->tl_tcon;
917}
918
919extern void cifs_put_tlink(struct tcon_link *tlink);
920
921static inline struct tcon_link *
922cifs_get_tlink(struct tcon_link *tlink)
923{
924 if (tlink && !IS_ERR(tlink))
925 atomic_inc(&tlink->tl_count);
926 return tlink;
927}
928
929/* This function is always expected to succeed */
930extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
931
932#define CIFS_OPLOCK_NO_CHANGE 0xfe
933
934struct cifs_pending_open {
935 struct list_head olist;
936 struct tcon_link *tlink;
937 __u8 lease_key[16];
938 __u32 oplock;
939};
940
941/*
942 * This info hangs off the cifsFileInfo structure, pointed to by llist.
943 * This is used to track byte stream locks on the file
944 */
945struct cifsLockInfo {
946 struct list_head llist; /* pointer to next cifsLockInfo */
947 struct list_head blist; /* pointer to locks blocked on this */
948 wait_queue_head_t block_q;
949 __u64 offset;
950 __u64 length;
951 __u32 pid;
952 __u32 type;
953};
954
955/*
956 * One of these for each open instance of a file
957 */
958struct cifs_search_info {
959 loff_t index_of_last_entry;
960 __u16 entries_in_buffer;
961 __u16 info_level;
962 __u32 resume_key;
963 char *ntwrk_buf_start;
964 char *srch_entries_start;
965 char *last_entry;
966 const char *presume_name;
967 unsigned int resume_name_len;
968 bool endOfSearch:1;
969 bool emptyDir:1;
970 bool unicode:1;
971 bool smallBuf:1; /* so we know which buf_release function to call */
972};
973
974struct cifs_open_parms {
975 struct cifs_tcon *tcon;
976 struct cifs_sb_info *cifs_sb;
977 int disposition;
978 int desired_access;
979 int create_options;
980 const char *path;
981 struct cifs_fid *fid;
982 bool reconnect:1;
983};
984
985struct cifs_fid {
986 __u16 netfid;
987#ifdef CONFIG_CIFS_SMB2
988 __u64 persistent_fid; /* persist file id for smb2 */
989 __u64 volatile_fid; /* volatile file id for smb2 */
990 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
991#endif
992 struct cifs_pending_open *pending_open;
993 unsigned int epoch;
994 bool purge_cache;
995};
996
997struct cifs_fid_locks {
998 struct list_head llist;
999 struct cifsFileInfo *cfile; /* fid that owns locks */
1000 struct list_head locks; /* locks held by fid above */
1001};
1002
1003struct cifsFileInfo {
1004 struct list_head tlist; /* pointer to next fid owned by tcon */
1005 struct list_head flist; /* next fid (file instance) for this inode */
1006 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1007 kuid_t uid; /* allows finding which FileInfo structure */
1008 __u32 pid; /* process id who opened file */
1009 struct cifs_fid fid; /* file id from remote */
1010 /* BB add lock scope info here if needed */ ;
1011 /* lock scope id (0 if none) */
1012 struct dentry *dentry;
1013 unsigned int f_flags;
1014 struct tcon_link *tlink;
1015 bool invalidHandle:1; /* file closed via session abend */
1016 bool oplock_break_cancelled:1;
1017 int count; /* refcount protected by cifs_file_list_lock */
1018 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1019 struct cifs_search_info srch_inf;
1020 struct work_struct oplock_break; /* work for oplock breaks */
1021};
1022
1023struct cifs_io_parms {
1024 __u16 netfid;
1025#ifdef CONFIG_CIFS_SMB2
1026 __u64 persistent_fid; /* persist file id for smb2 */
1027 __u64 volatile_fid; /* volatile file id for smb2 */
1028#endif
1029 __u32 pid;
1030 __u64 offset;
1031 unsigned int length;
1032 struct cifs_tcon *tcon;
1033};
1034
1035struct cifs_readdata;
1036
1037/* asynchronous read support */
1038struct cifs_readdata {
1039 struct kref refcount;
1040 struct list_head list;
1041 struct completion done;
1042 struct cifsFileInfo *cfile;
1043 struct address_space *mapping;
1044 __u64 offset;
1045 unsigned int bytes;
1046 pid_t pid;
1047 int result;
1048 struct work_struct work;
1049 int (*read_into_pages)(struct TCP_Server_Info *server,
1050 struct cifs_readdata *rdata,
1051 unsigned int len);
1052 struct kvec iov;
1053 unsigned int pagesz;
1054 unsigned int tailsz;
1055 unsigned int nr_pages;
1056 struct page *pages[];
1057};
1058
1059struct cifs_writedata;
1060
1061/* asynchronous write support */
1062struct cifs_writedata {
1063 struct kref refcount;
1064 struct list_head list;
1065 struct completion done;
1066 enum writeback_sync_modes sync_mode;
1067 struct work_struct work;
1068 struct cifsFileInfo *cfile;
1069 __u64 offset;
1070 pid_t pid;
1071 unsigned int bytes;
1072 int result;
1073 unsigned int pagesz;
1074 unsigned int tailsz;
1075 unsigned int nr_pages;
1076 struct page *pages[];
1077};
1078
1079/*
1080 * Take a reference on the file private data. Must be called with
1081 * cifs_file_list_lock held.
1082 */
1083static inline void
1084cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1085{
1086 ++cifs_file->count;
1087}
1088
1089struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1090void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1091
1092#define CIFS_CACHE_READ_FLG 1
1093#define CIFS_CACHE_HANDLE_FLG 2
1094#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1095#define CIFS_CACHE_WRITE_FLG 4
1096#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1097#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1098
1099#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1100#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1101#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1102
1103/*
1104 * One of these for each file inode
1105 */
1106
1107struct cifsInodeInfo {
1108 bool can_cache_brlcks;
1109 struct list_head llist; /* locks helb by this inode */
1110 struct rw_semaphore lock_sem; /* protect the fields above */
1111 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1112 struct list_head openFileList;
1113 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1114 unsigned int oplock; /* oplock/lease level we have */
1115 unsigned int epoch; /* used to track lease state changes */
1116 bool delete_pending; /* DELETE_ON_CLOSE is set */
1117 bool invalid_mapping; /* pagecache is invalid */
1118 unsigned long flags;
1119#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1120#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1121#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1122 spinlock_t writers_lock;
1123 unsigned int writers; /* Number of writers on this inode */
1124 unsigned long time; /* jiffies of last update of inode */
1125 u64 server_eof; /* current file size on server -- protected by i_lock */
1126 u64 uniqueid; /* server inode number */
1127 u64 createtime; /* creation time on server */
1128#ifdef CONFIG_CIFS_SMB2
1129 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1130#endif
1131#ifdef CONFIG_CIFS_FSCACHE
1132 struct fscache_cookie *fscache;
1133#endif
1134 struct inode vfs_inode;
1135};
1136
1137static inline struct cifsInodeInfo *
1138CIFS_I(struct inode *inode)
1139{
1140 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1141}
1142
1143static inline struct cifs_sb_info *
1144CIFS_SB(struct super_block *sb)
1145{
1146 return sb->s_fs_info;
1147}
1148
1149static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1150{
1151 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1152 return '/';
1153 else
1154 return '\\';
1155}
1156
1157static inline void
1158convert_delimiter(char *path, char delim)
1159{
1160 char old_delim, *pos;
1161
1162 if (delim == '/')
1163 old_delim = '\\';
1164 else
1165 old_delim = '/';
1166
1167 pos = path;
1168 while ((pos = strchr(pos, old_delim)))
1169 *pos = delim;
1170}
1171
1172#ifdef CONFIG_CIFS_STATS
1173#define cifs_stats_inc atomic_inc
1174
1175static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1176 unsigned int bytes)
1177{
1178 if (bytes) {
1179 spin_lock(&tcon->stat_lock);
1180 tcon->bytes_written += bytes;
1181 spin_unlock(&tcon->stat_lock);
1182 }
1183}
1184
1185static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1186 unsigned int bytes)
1187{
1188 spin_lock(&tcon->stat_lock);
1189 tcon->bytes_read += bytes;
1190 spin_unlock(&tcon->stat_lock);
1191}
1192#else
1193
1194#define cifs_stats_inc(field) do {} while (0)
1195#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1196#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1197
1198#endif
1199
1200
1201/*
1202 * This is the prototype for the mid receive function. This function is for
1203 * receiving the rest of the SMB frame, starting with the WordCount (which is
1204 * just after the MID in struct smb_hdr). Note:
1205 *
1206 * - This will be called by cifsd, with no locks held.
1207 * - The mid will still be on the pending_mid_q.
1208 * - mid->resp_buf will point to the current buffer.
1209 *
1210 * Returns zero on a successful receive, or an error. The receive state in
1211 * the TCP_Server_Info will also be updated.
1212 */
1213typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1214 struct mid_q_entry *mid);
1215
1216/*
1217 * This is the prototype for the mid callback function. This is called once the
1218 * mid has been received off of the socket. When creating one, take special
1219 * care to avoid deadlocks. Things to bear in mind:
1220 *
1221 * - it will be called by cifsd, with no locks held
1222 * - the mid will be removed from any lists
1223 */
1224typedef void (mid_callback_t)(struct mid_q_entry *mid);
1225
1226/* one of these for every pending CIFS request to the server */
1227struct mid_q_entry {
1228 struct list_head qhead; /* mids waiting on reply from this server */
1229 struct TCP_Server_Info *server; /* server corresponding to this mid */
1230 __u64 mid; /* multiplex id */
1231 __u32 pid; /* process id */
1232 __u32 sequence_number; /* for CIFS signing */
1233 unsigned long when_alloc; /* when mid was created */
1234#ifdef CONFIG_CIFS_STATS2
1235 unsigned long when_sent; /* time when smb send finished */
1236 unsigned long when_received; /* when demux complete (taken off wire) */
1237#endif
1238 mid_receive_t *receive; /* call receive callback */
1239 mid_callback_t *callback; /* call completion callback */
1240 void *callback_data; /* general purpose pointer for callback */
1241 void *resp_buf; /* pointer to received SMB header */
1242 int mid_state; /* wish this were enum but can not pass to wait_event */
1243 __le16 command; /* smb command code */
1244 bool large_buf:1; /* if valid response, is pointer to large buf */
1245 bool multiRsp:1; /* multiple trans2 responses for one request */
1246 bool multiEnd:1; /* both received */
1247};
1248
1249/* Make code in transport.c a little cleaner by moving
1250 update of optional stats into function below */
1251#ifdef CONFIG_CIFS_STATS2
1252
1253static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1254{
1255 atomic_inc(&server->in_send);
1256}
1257
1258static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1259{
1260 atomic_dec(&server->in_send);
1261}
1262
1263static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1264{
1265 atomic_inc(&server->num_waiters);
1266}
1267
1268static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1269{
1270 atomic_dec(&server->num_waiters);
1271}
1272
1273static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1274{
1275 mid->when_sent = jiffies;
1276}
1277#else
1278static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1279{
1280}
1281static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1282{
1283}
1284
1285static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1286{
1287}
1288
1289static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1290{
1291}
1292
1293static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1294{
1295}
1296#endif
1297
1298/* for pending dnotify requests */
1299struct dir_notify_req {
1300 struct list_head lhead;
1301 __le16 Pid;
1302 __le16 PidHigh;
1303 __u16 Mid;
1304 __u16 Tid;
1305 __u16 Uid;
1306 __u16 netfid;
1307 __u32 filter; /* CompletionFilter (for multishot) */
1308 int multishot;
1309 struct file *pfile;
1310};
1311
1312struct dfs_info3_param {
1313 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1314 int path_consumed;
1315 int server_type;
1316 int ref_flag;
1317 char *path_name;
1318 char *node_name;
1319};
1320
1321/*
1322 * common struct for holding inode info when searching for or updating an
1323 * inode with new info
1324 */
1325
1326#define CIFS_FATTR_DFS_REFERRAL 0x1
1327#define CIFS_FATTR_DELETE_PENDING 0x2
1328#define CIFS_FATTR_NEED_REVAL 0x4
1329#define CIFS_FATTR_INO_COLLISION 0x8
1330#define CIFS_FATTR_UNKNOWN_NLINK 0x10
1331
1332struct cifs_fattr {
1333 u32 cf_flags;
1334 u32 cf_cifsattrs;
1335 u64 cf_uniqueid;
1336 u64 cf_eof;
1337 u64 cf_bytes;
1338 u64 cf_createtime;
1339 kuid_t cf_uid;
1340 kgid_t cf_gid;
1341 umode_t cf_mode;
1342 dev_t cf_rdev;
1343 unsigned int cf_nlink;
1344 unsigned int cf_dtype;
1345 struct timespec cf_atime;
1346 struct timespec cf_mtime;
1347 struct timespec cf_ctime;
1348};
1349
1350static inline void free_dfs_info_param(struct dfs_info3_param *param)
1351{
1352 if (param) {
1353 kfree(param->path_name);
1354 kfree(param->node_name);
1355 kfree(param);
1356 }
1357}
1358
1359static inline void free_dfs_info_array(struct dfs_info3_param *param,
1360 int number_of_items)
1361{
1362 int i;
1363 if ((number_of_items == 0) || (param == NULL))
1364 return;
1365 for (i = 0; i < number_of_items; i++) {
1366 kfree(param[i].path_name);
1367 kfree(param[i].node_name);
1368 }
1369 kfree(param);
1370}
1371
1372#define MID_FREE 0
1373#define MID_REQUEST_ALLOCATED 1
1374#define MID_REQUEST_SUBMITTED 2
1375#define MID_RESPONSE_RECEIVED 4
1376#define MID_RETRY_NEEDED 8 /* session closed while this request out */
1377#define MID_RESPONSE_MALFORMED 0x10
1378#define MID_SHUTDOWN 0x20
1379
1380/* Types of response buffer returned from SendReceive2 */
1381#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1382#define CIFS_SMALL_BUFFER 1
1383#define CIFS_LARGE_BUFFER 2
1384#define CIFS_IOVEC 4 /* array of response buffers */
1385
1386/* Type of Request to SendReceive2 */
1387#define CIFS_BLOCKING_OP 1 /* operation can block */
1388#define CIFS_ASYNC_OP 2 /* do not wait for response */
1389#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1390#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1391#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1392#define CIFS_NO_RESP 0x040 /* no response buffer required */
1393
1394/* Type of request operation */
1395#define CIFS_ECHO_OP 0x080 /* echo request */
1396#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1397#define CIFS_NEG_OP 0x0200 /* negotiate request */
1398#define CIFS_OP_MASK 0x0380 /* mask request type */
1399
1400/* Security Flags: indicate type of session setup needed */
1401#define CIFSSEC_MAY_SIGN 0x00001
1402#define CIFSSEC_MAY_NTLM 0x00002
1403#define CIFSSEC_MAY_NTLMV2 0x00004
1404#define CIFSSEC_MAY_KRB5 0x00008
1405#ifdef CONFIG_CIFS_WEAK_PW_HASH
1406#define CIFSSEC_MAY_LANMAN 0x00010
1407#define CIFSSEC_MAY_PLNTXT 0x00020
1408#else
1409#define CIFSSEC_MAY_LANMAN 0
1410#define CIFSSEC_MAY_PLNTXT 0
1411#endif /* weak passwords */
1412#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1413#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1414
1415#define CIFSSEC_MUST_SIGN 0x01001
1416/* note that only one of the following can be set so the
1417result of setting MUST flags more than once will be to
1418require use of the stronger protocol */
1419#define CIFSSEC_MUST_NTLM 0x02002
1420#define CIFSSEC_MUST_NTLMV2 0x04004
1421#define CIFSSEC_MUST_KRB5 0x08008
1422#ifdef CONFIG_CIFS_WEAK_PW_HASH
1423#define CIFSSEC_MUST_LANMAN 0x10010
1424#define CIFSSEC_MUST_PLNTXT 0x20020
1425#ifdef CONFIG_CIFS_UPCALL
1426#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1427#else
1428#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1429#endif /* UPCALL */
1430#else /* do not allow weak pw hash */
1431#define CIFSSEC_MUST_LANMAN 0
1432#define CIFSSEC_MUST_PLNTXT 0
1433#ifdef CONFIG_CIFS_UPCALL
1434#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1435#else
1436#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1437#endif /* UPCALL */
1438#endif /* WEAK_PW_HASH */
1439#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1440#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1441
1442#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1443#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1444#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1445/*
1446 *****************************************************************
1447 * All constants go here
1448 *****************************************************************
1449 */
1450
1451#define UID_HASH (16)
1452
1453/*
1454 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1455 * following to be declared.
1456 */
1457
1458/****************************************************************************
1459 * Locking notes. All updates to global variables and lists should be
1460 * protected by spinlocks or semaphores.
1461 *
1462 * Spinlocks
1463 * ---------
1464 * GlobalMid_Lock protects:
1465 * list operations on pending_mid_q and oplockQ
1466 * updates to XID counters, multiplex id and SMB sequence numbers
1467 * cifs_file_list_lock protects:
1468 * list operations on tcp and SMB session lists and tCon lists
1469 * f_owner.lock protects certain per file struct operations
1470 * mapping->page_lock protects certain per page operations
1471 *
1472 * Semaphores
1473 * ----------
1474 * sesSem operations on smb session
1475 * tconSem operations on tree connection
1476 * fh_sem file handle reconnection operations
1477 *
1478 ****************************************************************************/
1479
1480#ifdef DECLARE_GLOBALS_HERE
1481#define GLOBAL_EXTERN
1482#else
1483#define GLOBAL_EXTERN extern
1484#endif
1485
1486/*
1487 * the list of TCP_Server_Info structures, ie each of the sockets
1488 * connecting our client to a distinct server (ip address), is
1489 * chained together by cifs_tcp_ses_list. The list of all our SMB
1490 * sessions (and from that the tree connections) can be found
1491 * by iterating over cifs_tcp_ses_list
1492 */
1493GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1494
1495/*
1496 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1497 * tcp session, and the list of tcon's per smb session. It also protects
1498 * the reference counters for the server, smb session, and tcon. Finally,
1499 * changes to the tcon->tidStatus should be done while holding this lock.
1500 */
1501GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1502
1503/*
1504 * This lock protects the cifs_file->llist and cifs_file->flist
1505 * list operations, and updates to some flags (cifs_file->invalidHandle)
1506 * It will be moved to either use the tcon->stat_lock or equivalent later.
1507 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1508 * the cifs_tcp_ses_lock must be grabbed first and released last.
1509 */
1510GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1511
1512#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1513/* Outstanding dir notify requests */
1514GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1515/* DirNotify response queue */
1516GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1517#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1518
1519/*
1520 * Global transaction id (XID) information
1521 */
1522GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1523GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1524GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1525GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1526 /* on midQ entries */
1527/*
1528 * Global counters, updated atomically
1529 */
1530GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1531GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1532GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1533GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1534GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1535
1536/* Various Debug counters */
1537GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1538#ifdef CONFIG_CIFS_STATS2
1539GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1540GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1541#endif
1542GLOBAL_EXTERN atomic_t smBufAllocCount;
1543GLOBAL_EXTERN atomic_t midCount;
1544
1545/* Misc globals */
1546GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1547GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1548GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1549 with more secure ntlmssp2 challenge/resp */
1550GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1551GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1552GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1553GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1554GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1555GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1556
1557#ifdef CONFIG_CIFS_ACL
1558GLOBAL_EXTERN struct rb_root uidtree;
1559GLOBAL_EXTERN struct rb_root gidtree;
1560GLOBAL_EXTERN spinlock_t siduidlock;
1561GLOBAL_EXTERN spinlock_t sidgidlock;
1562GLOBAL_EXTERN struct rb_root siduidtree;
1563GLOBAL_EXTERN struct rb_root sidgidtree;
1564GLOBAL_EXTERN spinlock_t uidsidlock;
1565GLOBAL_EXTERN spinlock_t gidsidlock;
1566#endif /* CONFIG_CIFS_ACL */
1567
1568void cifs_oplock_break(struct work_struct *work);
1569
1570extern const struct slow_work_ops cifs_oplock_break_ops;
1571extern struct workqueue_struct *cifsiod_wq;
1572
1573extern mempool_t *cifs_mid_poolp;
1574
1575/* Operations for different SMB versions */
1576#define SMB1_VERSION_STRING "1.0"
1577extern struct smb_version_operations smb1_operations;
1578extern struct smb_version_values smb1_values;
1579#define SMB20_VERSION_STRING "2.0"
1580extern struct smb_version_operations smb20_operations;
1581extern struct smb_version_values smb20_values;
1582#define SMB21_VERSION_STRING "2.1"
1583extern struct smb_version_operations smb21_operations;
1584extern struct smb_version_values smb21_values;
1585#define SMB30_VERSION_STRING "3.0"
1586extern struct smb_version_operations smb30_operations;
1587extern struct smb_version_values smb30_values;
1588#define SMB302_VERSION_STRING "3.02"
1589/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1590extern struct smb_version_values smb302_values;
1591#endif /* _CIFS_GLOB_H */