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cifs: clean up check_rfc1002_header
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / cifsglob.h
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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 uid_t backupuid;
171 gid_t backupgid;
172 mode_t file_mode;
173 mode_t dir_mode;
174 unsigned secFlg;
175 bool retry:1;
176 bool intr:1;
177 bool setuids:1;
178 bool override_uid:1;
179 bool override_gid:1;
180 bool dynperm:1;
181 bool noperm:1;
182 bool no_psx_acl:1; /* set if posix acl support should be disabled */
183 bool cifs_acl:1;
184 bool backupuid_specified; /* mount option backupuid is specified */
185 bool backupgid_specified; /* mount option backupgid is specified */
186 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
187 bool server_ino:1; /* use inode numbers from server ie UniqueId */
188 bool direct_io:1;
189 bool strict_io:1; /* strict cache behavior */
190 bool remap:1; /* set to remap seven reserved chars in filenames */
191 bool posix_paths:1; /* unset to not ask for posix pathnames. */
192 bool no_linux_ext:1;
193 bool sfu_emul:1;
194 bool nullauth:1; /* attempt to authenticate with null user */
195 bool nocase:1; /* request case insensitive filenames */
196 bool nobrl:1; /* disable sending byte range locks to srv */
197 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
198 bool seal:1; /* request transport encryption on share */
199 bool nodfs:1; /* Do not request DFS, even if available */
200 bool local_lease:1; /* check leases only on local system, not remote */
201 bool noblocksnd:1;
202 bool noautotune:1;
203 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
204 bool fsc:1; /* enable fscache */
205 bool mfsymlinks:1; /* use Minshall+French Symlinks */
206 bool multiuser:1;
207 bool rwpidforward:1; /* pid forward for read/write operations */
208 unsigned int rsize;
209 unsigned int wsize;
210 bool sockopt_tcp_nodelay:1;
211 unsigned short int port;
212 unsigned long actimeo; /* attribute cache timeout (jiffies) */
213 char *prepath;
214 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
215 struct nls_table *local_nls;
216};
217
218#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
219 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
220 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
221 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
222 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
223 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
224 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
225 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
226 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
227 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
228
229#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
230 MS_NODEV | MS_SYNCHRONOUS)
231
232struct cifs_mnt_data {
233 struct cifs_sb_info *cifs_sb;
234 struct smb_vol *vol;
235 int flags;
236};
237
238struct TCP_Server_Info {
239 struct list_head tcp_ses_list;
240 struct list_head smb_ses_list;
241 int srv_count; /* reference counter */
242 /* 15 character server name + 0x20 16th byte indicating type = srv */
243 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
244 enum statusEnum tcpStatus; /* what we think the status is */
245 char *hostname; /* hostname portion of UNC string */
246 struct socket *ssocket;
247 struct sockaddr_storage dstaddr;
248 struct sockaddr_storage srcaddr; /* locally bind to this IP */
249#ifdef CONFIG_NET_NS
250 struct net *net;
251#endif
252 wait_queue_head_t response_q;
253 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
254 struct list_head pending_mid_q;
255 bool noblocksnd; /* use blocking sendmsg */
256 bool noautotune; /* do not autotune send buf sizes */
257 bool tcp_nodelay;
258 atomic_t inFlight; /* number of requests on the wire to server */
259 struct mutex srv_mutex;
260 struct task_struct *tsk;
261 char server_GUID[16];
262 char sec_mode;
263 bool session_estab; /* mark when very first sess is established */
264 u16 dialect; /* dialect index that server chose */
265 enum securityEnum secType;
266 unsigned int maxReq; /* Clients should submit no more */
267 /* than maxReq distinct unanswered SMBs to the server when using */
268 /* multiplexed reads or writes */
269 unsigned int maxBuf; /* maxBuf specifies the maximum */
270 /* message size the server can send or receive for non-raw SMBs */
271 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
272 /* when socket is setup (and during reconnect) before NegProt sent */
273 unsigned int max_rw; /* maxRw specifies the maximum */
274 /* message size the server can send or receive for */
275 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
276 unsigned int max_vcs; /* maximum number of smb sessions, at least
277 those that can be specified uniquely with
278 vcnumbers */
279 int capabilities; /* allow selective disabling of caps by smb sess */
280 int timeAdj; /* Adjust for difference in server time zone in sec */
281 __u16 CurrentMid; /* multiplex id - rotating counter */
282 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
283 /* 16th byte of RFC1001 workstation name is always null */
284 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
285 __u32 sequence_number; /* for signing, protected by srv_mutex */
286 struct session_key session_key;
287 unsigned long lstrp; /* when we got last response from this server */
288 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
289 /* extended security flavors that server supports */
290 bool sec_ntlmssp; /* supports NTLMSSP */
291 bool sec_kerberosu2u; /* supports U2U Kerberos */
292 bool sec_kerberos; /* supports plain Kerberos */
293 bool sec_mskerberos; /* supports legacy MS Kerberos */
294 struct delayed_work echo; /* echo ping workqueue job */
295#ifdef CONFIG_CIFS_FSCACHE
296 struct fscache_cookie *fscache; /* client index cache cookie */
297#endif
298#ifdef CONFIG_CIFS_STATS2
299 atomic_t in_send; /* requests trying to send */
300 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
301#endif
302};
303
304/*
305 * Macros to allow the TCP_Server_Info->net field and related code to drop out
306 * when CONFIG_NET_NS isn't set.
307 */
308
309#ifdef CONFIG_NET_NS
310
311static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
312{
313 return srv->net;
314}
315
316static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
317{
318 srv->net = net;
319}
320
321#else
322
323static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
324{
325 return &init_net;
326}
327
328static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
329{
330}
331
332#endif
333
334/*
335 * Session structure. One of these for each uid session with a particular host
336 */
337struct cifs_ses {
338 struct list_head smb_ses_list;
339 struct list_head tcon_list;
340 struct mutex session_mutex;
341 struct TCP_Server_Info *server; /* pointer to server info */
342 int ses_count; /* reference counter */
343 enum statusEnum status;
344 unsigned overrideSecFlg; /* if non-zero override global sec flags */
345 __u16 ipc_tid; /* special tid for connection to IPC share */
346 __u16 flags;
347 __u16 vcnum;
348 char *serverOS; /* name of operating system underlying server */
349 char *serverNOS; /* name of network operating system of server */
350 char *serverDomain; /* security realm of server */
351 int Suid; /* remote smb uid */
352 uid_t linux_uid; /* overriding owner of files on the mount */
353 uid_t cred_uid; /* owner of credentials */
354 int capabilities;
355 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
356 TCP names - will ipv6 and sctp addresses fit? */
357 char *user_name; /* must not be null except during init of sess
358 and after mount option parsing we fill it */
359 char *domainName;
360 char *password;
361 struct session_key auth_key;
362 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
363 bool need_reconnect:1; /* connection reset, uid now invalid */
364};
365/* no more than one of the following three session flags may be set */
366#define CIFS_SES_NT4 1
367#define CIFS_SES_OS2 2
368#define CIFS_SES_W9X 4
369/* following flag is set for old servers such as OS2 (and Win95?)
370 which do not negotiate NTLM or POSIX dialects, but instead
371 negotiate one of the older LANMAN dialects */
372#define CIFS_SES_LANMAN 8
373/*
374 * there is one of these for each connection to a resource on a particular
375 * session
376 */
377struct cifs_tcon {
378 struct list_head tcon_list;
379 int tc_count;
380 struct list_head openFileList;
381 struct cifs_ses *ses; /* pointer to session associated with */
382 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
383 char *nativeFileSystem;
384 char *password; /* for share-level security */
385 __u16 tid; /* The 2 byte tree id */
386 __u16 Flags; /* optional support bits */
387 enum statusEnum tidStatus;
388#ifdef CONFIG_CIFS_STATS
389 atomic_t num_smbs_sent;
390 atomic_t num_writes;
391 atomic_t num_reads;
392 atomic_t num_flushes;
393 atomic_t num_oplock_brks;
394 atomic_t num_opens;
395 atomic_t num_closes;
396 atomic_t num_deletes;
397 atomic_t num_mkdirs;
398 atomic_t num_posixopens;
399 atomic_t num_posixmkdirs;
400 atomic_t num_rmdirs;
401 atomic_t num_renames;
402 atomic_t num_t2renames;
403 atomic_t num_ffirst;
404 atomic_t num_fnext;
405 atomic_t num_fclose;
406 atomic_t num_hardlinks;
407 atomic_t num_symlinks;
408 atomic_t num_locks;
409 atomic_t num_acl_get;
410 atomic_t num_acl_set;
411#ifdef CONFIG_CIFS_STATS2
412 unsigned long long time_writes;
413 unsigned long long time_reads;
414 unsigned long long time_opens;
415 unsigned long long time_deletes;
416 unsigned long long time_closes;
417 unsigned long long time_mkdirs;
418 unsigned long long time_rmdirs;
419 unsigned long long time_renames;
420 unsigned long long time_t2renames;
421 unsigned long long time_ffirst;
422 unsigned long long time_fnext;
423 unsigned long long time_fclose;
424#endif /* CONFIG_CIFS_STATS2 */
425 __u64 bytes_read;
426 __u64 bytes_written;
427 spinlock_t stat_lock;
428#endif /* CONFIG_CIFS_STATS */
429 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
430 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
431 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
432 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
433 bool retry:1;
434 bool nocase:1;
435 bool seal:1; /* transport encryption for this mounted share */
436 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
437 for this mount even if server would support */
438 bool local_lease:1; /* check leases (only) on local system not remote */
439 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
440 bool need_reconnect:1; /* connection reset, tid now invalid */
441#ifdef CONFIG_CIFS_FSCACHE
442 u64 resource_id; /* server resource id */
443 struct fscache_cookie *fscache; /* cookie for share */
444#endif
445 /* BB add field for back pointer to sb struct(s)? */
446};
447
448/*
449 * This is a refcounted and timestamped container for a tcon pointer. The
450 * container holds a tcon reference. It is considered safe to free one of
451 * these when the tl_count goes to 0. The tl_time is the time of the last
452 * "get" on the container.
453 */
454struct tcon_link {
455 struct rb_node tl_rbnode;
456 uid_t tl_uid;
457 unsigned long tl_flags;
458#define TCON_LINK_MASTER 0
459#define TCON_LINK_PENDING 1
460#define TCON_LINK_IN_TREE 2
461 unsigned long tl_time;
462 atomic_t tl_count;
463 struct cifs_tcon *tl_tcon;
464};
465
466extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
467
468static inline struct cifs_tcon *
469tlink_tcon(struct tcon_link *tlink)
470{
471 return tlink->tl_tcon;
472}
473
474extern void cifs_put_tlink(struct tcon_link *tlink);
475
476static inline struct tcon_link *
477cifs_get_tlink(struct tcon_link *tlink)
478{
479 if (tlink && !IS_ERR(tlink))
480 atomic_inc(&tlink->tl_count);
481 return tlink;
482}
483
484/* This function is always expected to succeed */
485extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
486
487/*
488 * This info hangs off the cifsFileInfo structure, pointed to by llist.
489 * This is used to track byte stream locks on the file
490 */
491struct cifsLockInfo {
492 struct list_head llist; /* pointer to next cifsLockInfo */
493 __u64 offset;
494 __u64 length;
495 __u32 pid;
496 __u8 type;
497};
498
499/*
500 * One of these for each open instance of a file
501 */
502struct cifs_search_info {
503 loff_t index_of_last_entry;
504 __u16 entries_in_buffer;
505 __u16 info_level;
506 __u32 resume_key;
507 char *ntwrk_buf_start;
508 char *srch_entries_start;
509 char *last_entry;
510 const char *presume_name;
511 unsigned int resume_name_len;
512 bool endOfSearch:1;
513 bool emptyDir:1;
514 bool unicode:1;
515 bool smallBuf:1; /* so we know which buf_release function to call */
516};
517
518struct cifsFileInfo {
519 struct list_head tlist; /* pointer to next fid owned by tcon */
520 struct list_head flist; /* next fid (file instance) for this inode */
521 unsigned int uid; /* allows finding which FileInfo structure */
522 __u32 pid; /* process id who opened file */
523 __u16 netfid; /* file id from remote */
524 /* BB add lock scope info here if needed */ ;
525 /* lock scope id (0 if none) */
526 struct dentry *dentry;
527 unsigned int f_flags;
528 struct tcon_link *tlink;
529 struct mutex lock_mutex;
530 struct list_head llist; /* list of byte range locks we have. */
531 bool invalidHandle:1; /* file closed via session abend */
532 bool oplock_break_cancelled:1;
533 int count; /* refcount protected by cifs_file_list_lock */
534 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
535 struct cifs_search_info srch_inf;
536 struct work_struct oplock_break; /* work for oplock breaks */
537};
538
539struct cifs_io_parms {
540 __u16 netfid;
541 __u32 pid;
542 __u64 offset;
543 unsigned int length;
544 struct cifs_tcon *tcon;
545};
546
547/*
548 * Take a reference on the file private data. Must be called with
549 * cifs_file_list_lock held.
550 */
551static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
552{
553 ++cifs_file->count;
554}
555
556void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
557
558/*
559 * One of these for each file inode
560 */
561
562struct cifsInodeInfo {
563 struct list_head lockList;
564 /* BB add in lists for dirty pages i.e. write caching info for oplock */
565 struct list_head openFileList;
566 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
567 bool clientCanCacheRead; /* read oplock */
568 bool clientCanCacheAll; /* read and writebehind oplock */
569 bool delete_pending; /* DELETE_ON_CLOSE is set */
570 bool invalid_mapping; /* pagecache is invalid */
571 unsigned long time; /* jiffies of last update of inode */
572 u64 server_eof; /* current file size on server */
573 u64 uniqueid; /* server inode number */
574 u64 createtime; /* creation time on server */
575#ifdef CONFIG_CIFS_FSCACHE
576 struct fscache_cookie *fscache;
577#endif
578 struct inode vfs_inode;
579};
580
581static inline struct cifsInodeInfo *
582CIFS_I(struct inode *inode)
583{
584 return container_of(inode, struct cifsInodeInfo, vfs_inode);
585}
586
587static inline struct cifs_sb_info *
588CIFS_SB(struct super_block *sb)
589{
590 return sb->s_fs_info;
591}
592
593static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
594{
595 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
596 return '/';
597 else
598 return '\\';
599}
600
601static inline void
602convert_delimiter(char *path, char delim)
603{
604 int i;
605 char old_delim;
606
607 if (path == NULL)
608 return;
609
610 if (delim == '/')
611 old_delim = '\\';
612 else
613 old_delim = '/';
614
615 for (i = 0; path[i] != '\0'; i++) {
616 if (path[i] == old_delim)
617 path[i] = delim;
618 }
619}
620
621#ifdef CONFIG_CIFS_STATS
622#define cifs_stats_inc atomic_inc
623
624static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
625 unsigned int bytes)
626{
627 if (bytes) {
628 spin_lock(&tcon->stat_lock);
629 tcon->bytes_written += bytes;
630 spin_unlock(&tcon->stat_lock);
631 }
632}
633
634static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
635 unsigned int bytes)
636{
637 spin_lock(&tcon->stat_lock);
638 tcon->bytes_read += bytes;
639 spin_unlock(&tcon->stat_lock);
640}
641#else
642
643#define cifs_stats_inc(field) do {} while (0)
644#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
645#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
646
647#endif
648
649struct mid_q_entry;
650
651/*
652 * This is the prototype for the mid callback function. When creating one,
653 * take special care to avoid deadlocks. Things to bear in mind:
654 *
655 * - it will be called by cifsd, with no locks held
656 * - the mid will be removed from any lists
657 */
658typedef void (mid_callback_t)(struct mid_q_entry *mid);
659
660/* one of these for every pending CIFS request to the server */
661struct mid_q_entry {
662 struct list_head qhead; /* mids waiting on reply from this server */
663 __u16 mid; /* multiplex id */
664 __u16 pid; /* process id */
665 __u32 sequence_number; /* for CIFS signing */
666 unsigned long when_alloc; /* when mid was created */
667#ifdef CONFIG_CIFS_STATS2
668 unsigned long when_sent; /* time when smb send finished */
669 unsigned long when_received; /* when demux complete (taken off wire) */
670#endif
671 mid_callback_t *callback; /* call completion callback */
672 void *callback_data; /* general purpose pointer for callback */
673 struct smb_hdr *resp_buf; /* response buffer */
674 int midState; /* wish this were enum but can not pass to wait_event */
675 __u8 command; /* smb command code */
676 bool largeBuf:1; /* if valid response, is pointer to large buf */
677 bool multiRsp:1; /* multiple trans2 responses for one request */
678 bool multiEnd:1; /* both received */
679};
680
681/* Make code in transport.c a little cleaner by moving
682 update of optional stats into function below */
683#ifdef CONFIG_CIFS_STATS2
684
685static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
686{
687 atomic_inc(&server->in_send);
688}
689
690static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
691{
692 atomic_dec(&server->in_send);
693}
694
695static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
696{
697 atomic_inc(&server->num_waiters);
698}
699
700static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
701{
702 atomic_dec(&server->num_waiters);
703}
704
705static inline void cifs_save_when_sent(struct mid_q_entry *mid)
706{
707 mid->when_sent = jiffies;
708}
709#else
710static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
711{
712}
713static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
714{
715}
716
717static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
718{
719}
720
721static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
722{
723}
724
725static inline void cifs_save_when_sent(struct mid_q_entry *mid)
726{
727}
728#endif
729
730/* for pending dnotify requests */
731struct dir_notify_req {
732 struct list_head lhead;
733 __le16 Pid;
734 __le16 PidHigh;
735 __u16 Mid;
736 __u16 Tid;
737 __u16 Uid;
738 __u16 netfid;
739 __u32 filter; /* CompletionFilter (for multishot) */
740 int multishot;
741 struct file *pfile;
742};
743
744struct dfs_info3_param {
745 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
746 int path_consumed;
747 int server_type;
748 int ref_flag;
749 char *path_name;
750 char *node_name;
751};
752
753/*
754 * common struct for holding inode info when searching for or updating an
755 * inode with new info
756 */
757
758#define CIFS_FATTR_DFS_REFERRAL 0x1
759#define CIFS_FATTR_DELETE_PENDING 0x2
760#define CIFS_FATTR_NEED_REVAL 0x4
761#define CIFS_FATTR_INO_COLLISION 0x8
762
763struct cifs_fattr {
764 u32 cf_flags;
765 u32 cf_cifsattrs;
766 u64 cf_uniqueid;
767 u64 cf_eof;
768 u64 cf_bytes;
769 u64 cf_createtime;
770 uid_t cf_uid;
771 gid_t cf_gid;
772 umode_t cf_mode;
773 dev_t cf_rdev;
774 unsigned int cf_nlink;
775 unsigned int cf_dtype;
776 struct timespec cf_atime;
777 struct timespec cf_mtime;
778 struct timespec cf_ctime;
779};
780
781static inline void free_dfs_info_param(struct dfs_info3_param *param)
782{
783 if (param) {
784 kfree(param->path_name);
785 kfree(param->node_name);
786 kfree(param);
787 }
788}
789
790static inline void free_dfs_info_array(struct dfs_info3_param *param,
791 int number_of_items)
792{
793 int i;
794 if ((number_of_items == 0) || (param == NULL))
795 return;
796 for (i = 0; i < number_of_items; i++) {
797 kfree(param[i].path_name);
798 kfree(param[i].node_name);
799 }
800 kfree(param);
801}
802
803#define MID_FREE 0
804#define MID_REQUEST_ALLOCATED 1
805#define MID_REQUEST_SUBMITTED 2
806#define MID_RESPONSE_RECEIVED 4
807#define MID_RETRY_NEEDED 8 /* session closed while this request out */
808#define MID_RESPONSE_MALFORMED 0x10
809#define MID_SHUTDOWN 0x20
810
811/* Types of response buffer returned from SendReceive2 */
812#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
813#define CIFS_SMALL_BUFFER 1
814#define CIFS_LARGE_BUFFER 2
815#define CIFS_IOVEC 4 /* array of response buffers */
816
817/* Type of Request to SendReceive2 */
818#define CIFS_BLOCKING_OP 1 /* operation can block */
819#define CIFS_ASYNC_OP 2 /* do not wait for response */
820#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
821#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
822#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
823#define CIFS_NO_RESP 0x040 /* no response buffer required */
824
825/* Security Flags: indicate type of session setup needed */
826#define CIFSSEC_MAY_SIGN 0x00001
827#define CIFSSEC_MAY_NTLM 0x00002
828#define CIFSSEC_MAY_NTLMV2 0x00004
829#define CIFSSEC_MAY_KRB5 0x00008
830#ifdef CONFIG_CIFS_WEAK_PW_HASH
831#define CIFSSEC_MAY_LANMAN 0x00010
832#define CIFSSEC_MAY_PLNTXT 0x00020
833#else
834#define CIFSSEC_MAY_LANMAN 0
835#define CIFSSEC_MAY_PLNTXT 0
836#endif /* weak passwords */
837#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
838#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
839
840#define CIFSSEC_MUST_SIGN 0x01001
841/* note that only one of the following can be set so the
842result of setting MUST flags more than once will be to
843require use of the stronger protocol */
844#define CIFSSEC_MUST_NTLM 0x02002
845#define CIFSSEC_MUST_NTLMV2 0x04004
846#define CIFSSEC_MUST_KRB5 0x08008
847#ifdef CONFIG_CIFS_WEAK_PW_HASH
848#define CIFSSEC_MUST_LANMAN 0x10010
849#define CIFSSEC_MUST_PLNTXT 0x20020
850#ifdef CONFIG_CIFS_UPCALL
851#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
852#else
853#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
854#endif /* UPCALL */
855#else /* do not allow weak pw hash */
856#ifdef CONFIG_CIFS_UPCALL
857#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
858#else
859#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
860#endif /* UPCALL */
861#endif /* WEAK_PW_HASH */
862#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
863#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
864
865#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
866#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
867#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
868/*
869 *****************************************************************
870 * All constants go here
871 *****************************************************************
872 */
873
874#define UID_HASH (16)
875
876/*
877 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
878 * following to be declared.
879 */
880
881/****************************************************************************
882 * Locking notes. All updates to global variables and lists should be
883 * protected by spinlocks or semaphores.
884 *
885 * Spinlocks
886 * ---------
887 * GlobalMid_Lock protects:
888 * list operations on pending_mid_q and oplockQ
889 * updates to XID counters, multiplex id and SMB sequence numbers
890 * cifs_file_list_lock protects:
891 * list operations on tcp and SMB session lists and tCon lists
892 * f_owner.lock protects certain per file struct operations
893 * mapping->page_lock protects certain per page operations
894 *
895 * Semaphores
896 * ----------
897 * sesSem operations on smb session
898 * tconSem operations on tree connection
899 * fh_sem file handle reconnection operations
900 *
901 ****************************************************************************/
902
903#ifdef DECLARE_GLOBALS_HERE
904#define GLOBAL_EXTERN
905#else
906#define GLOBAL_EXTERN extern
907#endif
908
909/*
910 * the list of TCP_Server_Info structures, ie each of the sockets
911 * connecting our client to a distinct server (ip address), is
912 * chained together by cifs_tcp_ses_list. The list of all our SMB
913 * sessions (and from that the tree connections) can be found
914 * by iterating over cifs_tcp_ses_list
915 */
916GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
917
918/*
919 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
920 * tcp session, and the list of tcon's per smb session. It also protects
921 * the reference counters for the server, smb session, and tcon. Finally,
922 * changes to the tcon->tidStatus should be done while holding this lock.
923 */
924GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
925
926/*
927 * This lock protects the cifs_file->llist and cifs_file->flist
928 * list operations, and updates to some flags (cifs_file->invalidHandle)
929 * It will be moved to either use the tcon->stat_lock or equivalent later.
930 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
931 * the cifs_tcp_ses_lock must be grabbed first and released last.
932 */
933GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
934
935#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
936/* Outstanding dir notify requests */
937GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
938/* DirNotify response queue */
939GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
940#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
941
942/*
943 * Global transaction id (XID) information
944 */
945GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
946GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
947GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
948GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
949 /* on midQ entries */
950/*
951 * Global counters, updated atomically
952 */
953GLOBAL_EXTERN atomic_t sesInfoAllocCount;
954GLOBAL_EXTERN atomic_t tconInfoAllocCount;
955GLOBAL_EXTERN atomic_t tcpSesAllocCount;
956GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
957GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
958
959/* Various Debug counters */
960GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
961#ifdef CONFIG_CIFS_STATS2
962GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
963GLOBAL_EXTERN atomic_t totSmBufAllocCount;
964#endif
965GLOBAL_EXTERN atomic_t smBufAllocCount;
966GLOBAL_EXTERN atomic_t midCount;
967
968/* Misc globals */
969GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
970 to be established on existing mount if we
971 have the uid/password or Kerberos credential
972 or equivalent for current user */
973/* enable or disable oplocks */
974GLOBAL_EXTERN bool enable_oplocks;
975GLOBAL_EXTERN unsigned int lookupCacheEnabled;
976GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
977 with more secure ntlmssp2 challenge/resp */
978GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
979GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
980GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
981GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
982GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
983GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
984
985/* reconnect after this many failed echo attempts */
986GLOBAL_EXTERN unsigned short echo_retries;
987
988#ifdef CONFIG_CIFS_ACL
989GLOBAL_EXTERN struct rb_root uidtree;
990GLOBAL_EXTERN struct rb_root gidtree;
991GLOBAL_EXTERN spinlock_t siduidlock;
992GLOBAL_EXTERN spinlock_t sidgidlock;
993GLOBAL_EXTERN struct rb_root siduidtree;
994GLOBAL_EXTERN struct rb_root sidgidtree;
995GLOBAL_EXTERN spinlock_t uidsidlock;
996GLOBAL_EXTERN spinlock_t gidsidlock;
997#endif /* CONFIG_CIFS_ACL */
998
999void cifs_oplock_break(struct work_struct *work);
1000
1001extern const struct slow_work_ops cifs_oplock_break_ops;
1002
1003#endif /* _CIFS_GLOB_H */
kernel source for telekom puls (alcatel/mediatek)