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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#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
47/*
48 * default attribute cache timeout (jiffies)
49 */
50#define CIFS_DEF_ACTIMEO (1 * HZ)
51
52/*
53 * max attribute cache timeout (jiffies) - 2^30
54 */
55#define CIFS_MAX_ACTIMEO (1 << 30)
56
57/*
58 * MAX_REQ is the maximum number of requests that WE will send
59 * on one socket concurrently.
60 */
61#define CIFS_MAX_REQ 32767
62
63#define RFC1001_NAME_LEN 15
64#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
65
66/* currently length of NIP6_FMT */
67#define SERVER_NAME_LENGTH 40
68#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
69
70/* used to define string lengths for reversing unicode strings */
71/* (256+1)*2 = 514 */
72/* (max path length + 1 for null) * 2 for unicode */
73#define MAX_NAME 514
74
75#include "cifspdu.h"
76
77#ifndef XATTR_DOS_ATTRIB
78#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
79#endif
80
81/*
82 * CIFS vfs client Status information (based on what we know.)
83 */
84
85/* associated with each tcp and smb session */
86enum statusEnum {
87 CifsNew = 0,
88 CifsGood,
89 CifsExiting,
90 CifsNeedReconnect,
91 CifsNeedNegotiate
92};
93
94enum securityEnum {
95 LANMAN = 0, /* Legacy LANMAN auth */
96 NTLM, /* Legacy NTLM012 auth with NTLM hash */
97 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
98 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
99/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
100 Kerberos, /* Kerberos via SPNEGO */
101};
102
103enum protocolEnum {
104 TCP = 0,
105 SCTP
106 /* Netbios frames protocol not supported at this time */
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 sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
125 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
126};
127
128/* per smb session structure/fields */
129struct ntlmssp_auth {
130 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
131 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
132 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
133 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
134};
135
136struct cifs_cred {
137 int uid;
138 int gid;
139 int mode;
140 int cecount;
141 struct cifs_sid osid;
142 struct cifs_sid gsid;
143 struct cifs_ntace *ntaces;
144 struct cifs_ace *aces;
145};
146
147/*
148 *****************************************************************
149 * Except the CIFS PDUs themselves all the
150 * globally interesting structs should go here
151 *****************************************************************
152 */
153
154enum smb_version {
155 Smb_1 = 1,
156 Smb_21,
157};
158
159struct mid_q_entry;
160struct TCP_Server_Info;
161struct cifsFileInfo;
162struct cifs_ses;
163
164struct smb_version_operations {
165 int (*send_cancel)(struct TCP_Server_Info *, void *,
166 struct mid_q_entry *);
167 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
168 /* setup request: allocate mid, sign message */
169 int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
170 struct mid_q_entry **);
171 /* check response: verify signature, map error */
172 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
173 bool);
174 void (*add_credits)(struct TCP_Server_Info *, const unsigned int);
175 void (*set_credits)(struct TCP_Server_Info *, const int);
176 int * (*get_credits_field)(struct TCP_Server_Info *);
177 __u64 (*get_next_mid)(struct TCP_Server_Info *);
178 /* data offset from read response message */
179 unsigned int (*read_data_offset)(char *);
180 /* data length from read response message */
181 unsigned int (*read_data_length)(char *);
182 /* map smb to linux error */
183 int (*map_error)(char *, bool);
184 /* find mid corresponding to the response message */
185 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
186 void (*dump_detail)(void *);
187 /* verify the message */
188 int (*check_message)(char *, unsigned int);
189 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
190};
191
192struct smb_version_values {
193 char *version_string;
194 __u32 large_lock_type;
195 __u32 exclusive_lock_type;
196 __u32 shared_lock_type;
197 __u32 unlock_lock_type;
198 size_t header_size;
199 size_t max_header_size;
200 size_t read_rsp_size;
201};
202
203#define HEADER_SIZE(server) (server->vals->header_size)
204#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
205
206struct smb_vol {
207 char *username;
208 char *password;
209 char *domainname;
210 char *UNC;
211 char *UNCip;
212 char *iocharset; /* local code page for mapping to and from Unicode */
213 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
214 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
215 uid_t cred_uid;
216 uid_t linux_uid;
217 gid_t linux_gid;
218 uid_t backupuid;
219 gid_t backupgid;
220 umode_t file_mode;
221 umode_t dir_mode;
222 unsigned secFlg;
223 bool retry:1;
224 bool intr:1;
225 bool setuids:1;
226 bool override_uid:1;
227 bool override_gid:1;
228 bool dynperm:1;
229 bool noperm:1;
230 bool no_psx_acl:1; /* set if posix acl support should be disabled */
231 bool cifs_acl:1;
232 bool backupuid_specified; /* mount option backupuid is specified */
233 bool backupgid_specified; /* mount option backupgid is specified */
234 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
235 bool server_ino:1; /* use inode numbers from server ie UniqueId */
236 bool direct_io:1;
237 bool strict_io:1; /* strict cache behavior */
238 bool remap:1; /* set to remap seven reserved chars in filenames */
239 bool posix_paths:1; /* unset to not ask for posix pathnames. */
240 bool no_linux_ext:1;
241 bool sfu_emul:1;
242 bool nullauth:1; /* attempt to authenticate with null user */
243 bool nocase:1; /* request case insensitive filenames */
244 bool nobrl:1; /* disable sending byte range locks to srv */
245 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
246 bool seal:1; /* request transport encryption on share */
247 bool nodfs:1; /* Do not request DFS, even if available */
248 bool local_lease:1; /* check leases only on local system, not remote */
249 bool noblocksnd:1;
250 bool noautotune:1;
251 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
252 bool fsc:1; /* enable fscache */
253 bool mfsymlinks:1; /* use Minshall+French Symlinks */
254 bool multiuser:1;
255 bool rwpidforward:1; /* pid forward for read/write operations */
256 unsigned int rsize;
257 unsigned int wsize;
258 bool sockopt_tcp_nodelay:1;
259 unsigned short int port;
260 unsigned long actimeo; /* attribute cache timeout (jiffies) */
261 struct smb_version_operations *ops;
262 struct smb_version_values *vals;
263 char *prepath;
264 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
265 struct nls_table *local_nls;
266};
267
268#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
269 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
270 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
271 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
272 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
273 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
274 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
275 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
276 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
277 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
278
279#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
280 MS_NODEV | MS_SYNCHRONOUS)
281
282struct cifs_mnt_data {
283 struct cifs_sb_info *cifs_sb;
284 struct smb_vol *vol;
285 int flags;
286};
287
288static inline unsigned int
289get_rfc1002_length(void *buf)
290{
291 return be32_to_cpu(*((__be32 *)buf));
292}
293
294struct TCP_Server_Info {
295 struct list_head tcp_ses_list;
296 struct list_head smb_ses_list;
297 int srv_count; /* reference counter */
298 /* 15 character server name + 0x20 16th byte indicating type = srv */
299 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
300 struct smb_version_operations *ops;
301 struct smb_version_values *vals;
302 enum statusEnum tcpStatus; /* what we think the status is */
303 char *hostname; /* hostname portion of UNC string */
304 struct socket *ssocket;
305 struct sockaddr_storage dstaddr;
306 struct sockaddr_storage srcaddr; /* locally bind to this IP */
307#ifdef CONFIG_NET_NS
308 struct net *net;
309#endif
310 wait_queue_head_t response_q;
311 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
312 struct list_head pending_mid_q;
313 bool noblocksnd; /* use blocking sendmsg */
314 bool noautotune; /* do not autotune send buf sizes */
315 bool tcp_nodelay;
316 int credits; /* send no more requests at once */
317 unsigned int in_flight; /* number of requests on the wire to server */
318 spinlock_t req_lock; /* protect the two values above */
319 struct mutex srv_mutex;
320 struct task_struct *tsk;
321 char server_GUID[16];
322 char sec_mode;
323 bool session_estab; /* mark when very first sess is established */
324 u16 dialect; /* dialect index that server chose */
325 enum securityEnum secType;
326 bool oplocks:1; /* enable oplocks */
327 unsigned int maxReq; /* Clients should submit no more */
328 /* than maxReq distinct unanswered SMBs to the server when using */
329 /* multiplexed reads or writes */
330 unsigned int maxBuf; /* maxBuf specifies the maximum */
331 /* message size the server can send or receive for non-raw SMBs */
332 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
333 /* when socket is setup (and during reconnect) before NegProt sent */
334 unsigned int max_rw; /* maxRw specifies the maximum */
335 /* message size the server can send or receive for */
336 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
337 unsigned int max_vcs; /* maximum number of smb sessions, at least
338 those that can be specified uniquely with
339 vcnumbers */
340 int capabilities; /* allow selective disabling of caps by smb sess */
341 int timeAdj; /* Adjust for difference in server time zone in sec */
342 __u64 CurrentMid; /* multiplex id - rotating counter */
343 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
344 /* 16th byte of RFC1001 workstation name is always null */
345 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
346 __u32 sequence_number; /* for signing, protected by srv_mutex */
347 struct session_key session_key;
348 unsigned long lstrp; /* when we got last response from this server */
349 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
350 /* extended security flavors that server supports */
351 bool sec_ntlmssp; /* supports NTLMSSP */
352 bool sec_kerberosu2u; /* supports U2U Kerberos */
353 bool sec_kerberos; /* supports plain Kerberos */
354 bool sec_mskerberos; /* supports legacy MS Kerberos */
355 bool large_buf; /* is current buffer large? */
356 struct delayed_work echo; /* echo ping workqueue job */
357 struct kvec *iov; /* reusable kvec array for receives */
358 unsigned int nr_iov; /* number of kvecs in array */
359 char *smallbuf; /* pointer to current "small" buffer */
360 char *bigbuf; /* pointer to current "big" buffer */
361 unsigned int total_read; /* total amount of data read in this pass */
362#ifdef CONFIG_CIFS_FSCACHE
363 struct fscache_cookie *fscache; /* client index cache cookie */
364#endif
365#ifdef CONFIG_CIFS_STATS2
366 atomic_t in_send; /* requests trying to send */
367 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
368#endif
369};
370
371static inline unsigned int
372in_flight(struct TCP_Server_Info *server)
373{
374 unsigned int num;
375 spin_lock(&server->req_lock);
376 num = server->in_flight;
377 spin_unlock(&server->req_lock);
378 return num;
379}
380
381static inline bool
382has_credits(struct TCP_Server_Info *server, int *credits)
383{
384 int num;
385 spin_lock(&server->req_lock);
386 num = *credits;
387 spin_unlock(&server->req_lock);
388 return num > 0;
389}
390
391static inline void
392add_credits(struct TCP_Server_Info *server, const unsigned int add)
393{
394 server->ops->add_credits(server, add);
395}
396
397static inline void
398set_credits(struct TCP_Server_Info *server, const int val)
399{
400 server->ops->set_credits(server, val);
401}
402
403static inline __u64
404get_next_mid(struct TCP_Server_Info *server)
405{
406 return server->ops->get_next_mid(server);
407}
408
409/*
410 * Macros to allow the TCP_Server_Info->net field and related code to drop out
411 * when CONFIG_NET_NS isn't set.
412 */
413
414#ifdef CONFIG_NET_NS
415
416static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
417{
418 return srv->net;
419}
420
421static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
422{
423 srv->net = net;
424}
425
426#else
427
428static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
429{
430 return &init_net;
431}
432
433static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
434{
435}
436
437#endif
438
439/*
440 * Session structure. One of these for each uid session with a particular host
441 */
442struct cifs_ses {
443 struct list_head smb_ses_list;
444 struct list_head tcon_list;
445 struct mutex session_mutex;
446 struct TCP_Server_Info *server; /* pointer to server info */
447 int ses_count; /* reference counter */
448 enum statusEnum status;
449 unsigned overrideSecFlg; /* if non-zero override global sec flags */
450 __u16 ipc_tid; /* special tid for connection to IPC share */
451 __u16 flags;
452 __u16 vcnum;
453 char *serverOS; /* name of operating system underlying server */
454 char *serverNOS; /* name of network operating system of server */
455 char *serverDomain; /* security realm of server */
456 int Suid; /* remote smb uid */
457 uid_t linux_uid; /* overriding owner of files on the mount */
458 uid_t cred_uid; /* owner of credentials */
459 int capabilities;
460 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
461 TCP names - will ipv6 and sctp addresses fit? */
462 char *user_name; /* must not be null except during init of sess
463 and after mount option parsing we fill it */
464 char *domainName;
465 char *password;
466 struct session_key auth_key;
467 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
468 bool need_reconnect:1; /* connection reset, uid now invalid */
469};
470/* no more than one of the following three session flags may be set */
471#define CIFS_SES_NT4 1
472#define CIFS_SES_OS2 2
473#define CIFS_SES_W9X 4
474/* following flag is set for old servers such as OS2 (and Win95?)
475 which do not negotiate NTLM or POSIX dialects, but instead
476 negotiate one of the older LANMAN dialects */
477#define CIFS_SES_LANMAN 8
478/*
479 * there is one of these for each connection to a resource on a particular
480 * session
481 */
482struct cifs_tcon {
483 struct list_head tcon_list;
484 int tc_count;
485 struct list_head openFileList;
486 struct cifs_ses *ses; /* pointer to session associated with */
487 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
488 char *nativeFileSystem;
489 char *password; /* for share-level security */
490 __u16 tid; /* The 2 byte tree id */
491 __u16 Flags; /* optional support bits */
492 enum statusEnum tidStatus;
493#ifdef CONFIG_CIFS_STATS
494 atomic_t num_smbs_sent;
495 atomic_t num_writes;
496 atomic_t num_reads;
497 atomic_t num_flushes;
498 atomic_t num_oplock_brks;
499 atomic_t num_opens;
500 atomic_t num_closes;
501 atomic_t num_deletes;
502 atomic_t num_mkdirs;
503 atomic_t num_posixopens;
504 atomic_t num_posixmkdirs;
505 atomic_t num_rmdirs;
506 atomic_t num_renames;
507 atomic_t num_t2renames;
508 atomic_t num_ffirst;
509 atomic_t num_fnext;
510 atomic_t num_fclose;
511 atomic_t num_hardlinks;
512 atomic_t num_symlinks;
513 atomic_t num_locks;
514 atomic_t num_acl_get;
515 atomic_t num_acl_set;
516#ifdef CONFIG_CIFS_STATS2
517 unsigned long long time_writes;
518 unsigned long long time_reads;
519 unsigned long long time_opens;
520 unsigned long long time_deletes;
521 unsigned long long time_closes;
522 unsigned long long time_mkdirs;
523 unsigned long long time_rmdirs;
524 unsigned long long time_renames;
525 unsigned long long time_t2renames;
526 unsigned long long time_ffirst;
527 unsigned long long time_fnext;
528 unsigned long long time_fclose;
529#endif /* CONFIG_CIFS_STATS2 */
530 __u64 bytes_read;
531 __u64 bytes_written;
532 spinlock_t stat_lock;
533#endif /* CONFIG_CIFS_STATS */
534 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
535 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
536 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
537 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
538 bool retry:1;
539 bool nocase:1;
540 bool seal:1; /* transport encryption for this mounted share */
541 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
542 for this mount even if server would support */
543 bool local_lease:1; /* check leases (only) on local system not remote */
544 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
545 bool need_reconnect:1; /* connection reset, tid now invalid */
546#ifdef CONFIG_CIFS_FSCACHE
547 u64 resource_id; /* server resource id */
548 struct fscache_cookie *fscache; /* cookie for share */
549#endif
550 /* BB add field for back pointer to sb struct(s)? */
551};
552
553/*
554 * This is a refcounted and timestamped container for a tcon pointer. The
555 * container holds a tcon reference. It is considered safe to free one of
556 * these when the tl_count goes to 0. The tl_time is the time of the last
557 * "get" on the container.
558 */
559struct tcon_link {
560 struct rb_node tl_rbnode;
561 uid_t tl_uid;
562 unsigned long tl_flags;
563#define TCON_LINK_MASTER 0
564#define TCON_LINK_PENDING 1
565#define TCON_LINK_IN_TREE 2
566 unsigned long tl_time;
567 atomic_t tl_count;
568 struct cifs_tcon *tl_tcon;
569};
570
571extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
572
573static inline struct cifs_tcon *
574tlink_tcon(struct tcon_link *tlink)
575{
576 return tlink->tl_tcon;
577}
578
579extern void cifs_put_tlink(struct tcon_link *tlink);
580
581static inline struct tcon_link *
582cifs_get_tlink(struct tcon_link *tlink)
583{
584 if (tlink && !IS_ERR(tlink))
585 atomic_inc(&tlink->tl_count);
586 return tlink;
587}
588
589/* This function is always expected to succeed */
590extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
591
592/*
593 * This info hangs off the cifsFileInfo structure, pointed to by llist.
594 * This is used to track byte stream locks on the file
595 */
596struct cifsLockInfo {
597 struct list_head llist; /* pointer to next cifsLockInfo */
598 struct list_head blist; /* pointer to locks blocked on this */
599 wait_queue_head_t block_q;
600 __u64 offset;
601 __u64 length;
602 __u32 pid;
603 __u32 type;
604};
605
606/*
607 * One of these for each open instance of a file
608 */
609struct cifs_search_info {
610 loff_t index_of_last_entry;
611 __u16 entries_in_buffer;
612 __u16 info_level;
613 __u32 resume_key;
614 char *ntwrk_buf_start;
615 char *srch_entries_start;
616 char *last_entry;
617 const char *presume_name;
618 unsigned int resume_name_len;
619 bool endOfSearch:1;
620 bool emptyDir:1;
621 bool unicode:1;
622 bool smallBuf:1; /* so we know which buf_release function to call */
623};
624
625struct cifsFileInfo {
626 struct list_head tlist; /* pointer to next fid owned by tcon */
627 struct list_head flist; /* next fid (file instance) for this inode */
628 struct list_head llist; /*
629 * brlocks held by this fid, protected by
630 * lock_mutex from cifsInodeInfo structure
631 */
632 unsigned int uid; /* allows finding which FileInfo structure */
633 __u32 pid; /* process id who opened file */
634 __u16 netfid; /* file id from remote */
635 /* BB add lock scope info here if needed */ ;
636 /* lock scope id (0 if none) */
637 struct dentry *dentry;
638 unsigned int f_flags;
639 struct tcon_link *tlink;
640 bool invalidHandle:1; /* file closed via session abend */
641 bool oplock_break_cancelled:1;
642 int count; /* refcount protected by cifs_file_list_lock */
643 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
644 struct cifs_search_info srch_inf;
645 struct work_struct oplock_break; /* work for oplock breaks */
646};
647
648struct cifs_io_parms {
649 __u16 netfid;
650 __u32 pid;
651 __u64 offset;
652 unsigned int length;
653 struct cifs_tcon *tcon;
654};
655
656/*
657 * Take a reference on the file private data. Must be called with
658 * cifs_file_list_lock held.
659 */
660static inline void
661cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
662{
663 ++cifs_file->count;
664}
665
666struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
667void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
668
669/*
670 * One of these for each file inode
671 */
672
673struct cifsInodeInfo {
674 bool can_cache_brlcks;
675 struct mutex lock_mutex; /*
676 * protect the field above and llist
677 * from every cifsFileInfo structure
678 * from openFileList
679 */
680 /* BB add in lists for dirty pages i.e. write caching info for oplock */
681 struct list_head openFileList;
682 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
683 bool clientCanCacheRead; /* read oplock */
684 bool clientCanCacheAll; /* read and writebehind oplock */
685 bool delete_pending; /* DELETE_ON_CLOSE is set */
686 bool invalid_mapping; /* pagecache is invalid */
687 unsigned long time; /* jiffies of last update of inode */
688 u64 server_eof; /* current file size on server -- protected by i_lock */
689 u64 uniqueid; /* server inode number */
690 u64 createtime; /* creation time on server */
691#ifdef CONFIG_CIFS_FSCACHE
692 struct fscache_cookie *fscache;
693#endif
694 struct inode vfs_inode;
695};
696
697static inline struct cifsInodeInfo *
698CIFS_I(struct inode *inode)
699{
700 return container_of(inode, struct cifsInodeInfo, vfs_inode);
701}
702
703static inline struct cifs_sb_info *
704CIFS_SB(struct super_block *sb)
705{
706 return sb->s_fs_info;
707}
708
709static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
710{
711 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
712 return '/';
713 else
714 return '\\';
715}
716
717static inline void
718convert_delimiter(char *path, char delim)
719{
720 int i;
721 char old_delim;
722
723 if (path == NULL)
724 return;
725
726 if (delim == '/')
727 old_delim = '\\';
728 else
729 old_delim = '/';
730
731 for (i = 0; path[i] != '\0'; i++) {
732 if (path[i] == old_delim)
733 path[i] = delim;
734 }
735}
736
737#ifdef CONFIG_CIFS_STATS
738#define cifs_stats_inc atomic_inc
739
740static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
741 unsigned int bytes)
742{
743 if (bytes) {
744 spin_lock(&tcon->stat_lock);
745 tcon->bytes_written += bytes;
746 spin_unlock(&tcon->stat_lock);
747 }
748}
749
750static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
751 unsigned int bytes)
752{
753 spin_lock(&tcon->stat_lock);
754 tcon->bytes_read += bytes;
755 spin_unlock(&tcon->stat_lock);
756}
757#else
758
759#define cifs_stats_inc(field) do {} while (0)
760#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
761#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
762
763#endif
764
765
766/*
767 * This is the prototype for the mid receive function. This function is for
768 * receiving the rest of the SMB frame, starting with the WordCount (which is
769 * just after the MID in struct smb_hdr). Note:
770 *
771 * - This will be called by cifsd, with no locks held.
772 * - The mid will still be on the pending_mid_q.
773 * - mid->resp_buf will point to the current buffer.
774 *
775 * Returns zero on a successful receive, or an error. The receive state in
776 * the TCP_Server_Info will also be updated.
777 */
778typedef int (mid_receive_t)(struct TCP_Server_Info *server,
779 struct mid_q_entry *mid);
780
781/*
782 * This is the prototype for the mid callback function. This is called once the
783 * mid has been received off of the socket. When creating one, take special
784 * care to avoid deadlocks. Things to bear in mind:
785 *
786 * - it will be called by cifsd, with no locks held
787 * - the mid will be removed from any lists
788 */
789typedef void (mid_callback_t)(struct mid_q_entry *mid);
790
791/* one of these for every pending CIFS request to the server */
792struct mid_q_entry {
793 struct list_head qhead; /* mids waiting on reply from this server */
794 __u64 mid; /* multiplex id */
795 __u32 pid; /* process id */
796 __u32 sequence_number; /* for CIFS signing */
797 unsigned long when_alloc; /* when mid was created */
798#ifdef CONFIG_CIFS_STATS2
799 unsigned long when_sent; /* time when smb send finished */
800 unsigned long when_received; /* when demux complete (taken off wire) */
801#endif
802 mid_receive_t *receive; /* call receive callback */
803 mid_callback_t *callback; /* call completion callback */
804 void *callback_data; /* general purpose pointer for callback */
805 void *resp_buf; /* pointer to received SMB header */
806 int mid_state; /* wish this were enum but can not pass to wait_event */
807 __le16 command; /* smb command code */
808 bool large_buf:1; /* if valid response, is pointer to large buf */
809 bool multiRsp:1; /* multiple trans2 responses for one request */
810 bool multiEnd:1; /* both received */
811};
812
813/* Make code in transport.c a little cleaner by moving
814 update of optional stats into function below */
815#ifdef CONFIG_CIFS_STATS2
816
817static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
818{
819 atomic_inc(&server->in_send);
820}
821
822static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
823{
824 atomic_dec(&server->in_send);
825}
826
827static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
828{
829 atomic_inc(&server->num_waiters);
830}
831
832static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
833{
834 atomic_dec(&server->num_waiters);
835}
836
837static inline void cifs_save_when_sent(struct mid_q_entry *mid)
838{
839 mid->when_sent = jiffies;
840}
841#else
842static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
843{
844}
845static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
846{
847}
848
849static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
850{
851}
852
853static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
854{
855}
856
857static inline void cifs_save_when_sent(struct mid_q_entry *mid)
858{
859}
860#endif
861
862/* for pending dnotify requests */
863struct dir_notify_req {
864 struct list_head lhead;
865 __le16 Pid;
866 __le16 PidHigh;
867 __u16 Mid;
868 __u16 Tid;
869 __u16 Uid;
870 __u16 netfid;
871 __u32 filter; /* CompletionFilter (for multishot) */
872 int multishot;
873 struct file *pfile;
874};
875
876struct dfs_info3_param {
877 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
878 int path_consumed;
879 int server_type;
880 int ref_flag;
881 char *path_name;
882 char *node_name;
883};
884
885/*
886 * common struct for holding inode info when searching for or updating an
887 * inode with new info
888 */
889
890#define CIFS_FATTR_DFS_REFERRAL 0x1
891#define CIFS_FATTR_DELETE_PENDING 0x2
892#define CIFS_FATTR_NEED_REVAL 0x4
893#define CIFS_FATTR_INO_COLLISION 0x8
894
895struct cifs_fattr {
896 u32 cf_flags;
897 u32 cf_cifsattrs;
898 u64 cf_uniqueid;
899 u64 cf_eof;
900 u64 cf_bytes;
901 u64 cf_createtime;
902 uid_t cf_uid;
903 gid_t cf_gid;
904 umode_t cf_mode;
905 dev_t cf_rdev;
906 unsigned int cf_nlink;
907 unsigned int cf_dtype;
908 struct timespec cf_atime;
909 struct timespec cf_mtime;
910 struct timespec cf_ctime;
911};
912
913static inline void free_dfs_info_param(struct dfs_info3_param *param)
914{
915 if (param) {
916 kfree(param->path_name);
917 kfree(param->node_name);
918 kfree(param);
919 }
920}
921
922static inline void free_dfs_info_array(struct dfs_info3_param *param,
923 int number_of_items)
924{
925 int i;
926 if ((number_of_items == 0) || (param == NULL))
927 return;
928 for (i = 0; i < number_of_items; i++) {
929 kfree(param[i].path_name);
930 kfree(param[i].node_name);
931 }
932 kfree(param);
933}
934
935#define MID_FREE 0
936#define MID_REQUEST_ALLOCATED 1
937#define MID_REQUEST_SUBMITTED 2
938#define MID_RESPONSE_RECEIVED 4
939#define MID_RETRY_NEEDED 8 /* session closed while this request out */
940#define MID_RESPONSE_MALFORMED 0x10
941#define MID_SHUTDOWN 0x20
942
943/* Types of response buffer returned from SendReceive2 */
944#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
945#define CIFS_SMALL_BUFFER 1
946#define CIFS_LARGE_BUFFER 2
947#define CIFS_IOVEC 4 /* array of response buffers */
948
949/* Type of Request to SendReceive2 */
950#define CIFS_BLOCKING_OP 1 /* operation can block */
951#define CIFS_ASYNC_OP 2 /* do not wait for response */
952#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
953#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
954#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
955#define CIFS_NO_RESP 0x040 /* no response buffer required */
956
957/* Security Flags: indicate type of session setup needed */
958#define CIFSSEC_MAY_SIGN 0x00001
959#define CIFSSEC_MAY_NTLM 0x00002
960#define CIFSSEC_MAY_NTLMV2 0x00004
961#define CIFSSEC_MAY_KRB5 0x00008
962#ifdef CONFIG_CIFS_WEAK_PW_HASH
963#define CIFSSEC_MAY_LANMAN 0x00010
964#define CIFSSEC_MAY_PLNTXT 0x00020
965#else
966#define CIFSSEC_MAY_LANMAN 0
967#define CIFSSEC_MAY_PLNTXT 0
968#endif /* weak passwords */
969#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
970#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
971
972#define CIFSSEC_MUST_SIGN 0x01001
973/* note that only one of the following can be set so the
974result of setting MUST flags more than once will be to
975require use of the stronger protocol */
976#define CIFSSEC_MUST_NTLM 0x02002
977#define CIFSSEC_MUST_NTLMV2 0x04004
978#define CIFSSEC_MUST_KRB5 0x08008
979#ifdef CONFIG_CIFS_WEAK_PW_HASH
980#define CIFSSEC_MUST_LANMAN 0x10010
981#define CIFSSEC_MUST_PLNTXT 0x20020
982#ifdef CONFIG_CIFS_UPCALL
983#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
984#else
985#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
986#endif /* UPCALL */
987#else /* do not allow weak pw hash */
988#define CIFSSEC_MUST_LANMAN 0
989#define CIFSSEC_MUST_PLNTXT 0
990#ifdef CONFIG_CIFS_UPCALL
991#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
992#else
993#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
994#endif /* UPCALL */
995#endif /* WEAK_PW_HASH */
996#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
997#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
998
999#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
1000#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1001#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1002/*
1003 *****************************************************************
1004 * All constants go here
1005 *****************************************************************
1006 */
1007
1008#define UID_HASH (16)
1009
1010/*
1011 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1012 * following to be declared.
1013 */
1014
1015/****************************************************************************
1016 * Locking notes. All updates to global variables and lists should be
1017 * protected by spinlocks or semaphores.
1018 *
1019 * Spinlocks
1020 * ---------
1021 * GlobalMid_Lock protects:
1022 * list operations on pending_mid_q and oplockQ
1023 * updates to XID counters, multiplex id and SMB sequence numbers
1024 * cifs_file_list_lock protects:
1025 * list operations on tcp and SMB session lists and tCon lists
1026 * f_owner.lock protects certain per file struct operations
1027 * mapping->page_lock protects certain per page operations
1028 *
1029 * Semaphores
1030 * ----------
1031 * sesSem operations on smb session
1032 * tconSem operations on tree connection
1033 * fh_sem file handle reconnection operations
1034 *
1035 ****************************************************************************/
1036
1037#ifdef DECLARE_GLOBALS_HERE
1038#define GLOBAL_EXTERN
1039#else
1040#define GLOBAL_EXTERN extern
1041#endif
1042
1043/*
1044 * the list of TCP_Server_Info structures, ie each of the sockets
1045 * connecting our client to a distinct server (ip address), is
1046 * chained together by cifs_tcp_ses_list. The list of all our SMB
1047 * sessions (and from that the tree connections) can be found
1048 * by iterating over cifs_tcp_ses_list
1049 */
1050GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1051
1052/*
1053 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1054 * tcp session, and the list of tcon's per smb session. It also protects
1055 * the reference counters for the server, smb session, and tcon. Finally,
1056 * changes to the tcon->tidStatus should be done while holding this lock.
1057 */
1058GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1059
1060/*
1061 * This lock protects the cifs_file->llist and cifs_file->flist
1062 * list operations, and updates to some flags (cifs_file->invalidHandle)
1063 * It will be moved to either use the tcon->stat_lock or equivalent later.
1064 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1065 * the cifs_tcp_ses_lock must be grabbed first and released last.
1066 */
1067GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1068
1069#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1070/* Outstanding dir notify requests */
1071GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1072/* DirNotify response queue */
1073GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1074#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1075
1076/*
1077 * Global transaction id (XID) information
1078 */
1079GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1080GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1081GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1082GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1083 /* on midQ entries */
1084/*
1085 * Global counters, updated atomically
1086 */
1087GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1088GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1089GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1090GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1091GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1092
1093/* Various Debug counters */
1094GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1095#ifdef CONFIG_CIFS_STATS2
1096GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1097GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1098#endif
1099GLOBAL_EXTERN atomic_t smBufAllocCount;
1100GLOBAL_EXTERN atomic_t midCount;
1101
1102/* Misc globals */
1103GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1104GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1105GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1106 with more secure ntlmssp2 challenge/resp */
1107GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1108GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1109GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1110GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1111GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1112GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1113
1114#ifdef CONFIG_CIFS_ACL
1115GLOBAL_EXTERN struct rb_root uidtree;
1116GLOBAL_EXTERN struct rb_root gidtree;
1117GLOBAL_EXTERN spinlock_t siduidlock;
1118GLOBAL_EXTERN spinlock_t sidgidlock;
1119GLOBAL_EXTERN struct rb_root siduidtree;
1120GLOBAL_EXTERN struct rb_root sidgidtree;
1121GLOBAL_EXTERN spinlock_t uidsidlock;
1122GLOBAL_EXTERN spinlock_t gidsidlock;
1123#endif /* CONFIG_CIFS_ACL */
1124
1125void cifs_oplock_break(struct work_struct *work);
1126
1127extern const struct slow_work_ops cifs_oplock_break_ops;
1128extern struct workqueue_struct *cifsiod_wq;
1129
1130/* Operations for different SMB versions */
1131#define SMB1_VERSION_STRING "1.0"
1132extern struct smb_version_operations smb1_operations;
1133extern struct smb_version_values smb1_values;
1134#define SMB21_VERSION_STRING "2.1"
1135extern struct smb_version_operations smb21_operations;
1136extern struct smb_version_values smb21_values;
1137#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#include "smb2pdu.h"
33
34#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
35
36#define SMB_PATH_MAX 260
37#define CIFS_PORT 445
38#define RFC1001_PORT 139
39
40/*
41 * The sizes of various internal tables and strings
42 */
43#define MAX_UID_INFO 16
44#define MAX_SES_INFO 2
45#define MAX_TCON_INFO 4
46
47#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
48
49#define CIFS_MIN_RCV_POOL 4
50
51#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
52/*
53 * default attribute cache timeout (jiffies)
54 */
55#define CIFS_DEF_ACTIMEO (1 * HZ)
56
57/*
58 * max attribute cache timeout (jiffies) - 2^30
59 */
60#define CIFS_MAX_ACTIMEO (1 << 30)
61
62/*
63 * Max persistent and resilient handle timeout (milliseconds).
64 * Windows durable max was 960000 (16 minutes)
65 */
66#define SMB3_MAX_HANDLE_TIMEOUT 960000
67
68/*
69 * MAX_REQ is the maximum number of requests that WE will send
70 * on one socket concurrently.
71 */
72#define CIFS_MAX_REQ 32767
73
74#define RFC1001_NAME_LEN 15
75#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
76
77/* maximum length of ip addr as a string (including ipv6 and sctp) */
78#define SERVER_NAME_LENGTH 80
79#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
80
81/* echo interval in seconds */
82#define SMB_ECHO_INTERVAL_MIN 1
83#define SMB_ECHO_INTERVAL_MAX 600
84#define SMB_ECHO_INTERVAL_DEFAULT 60
85
86/* maximum number of PDUs in one compound */
87#define MAX_COMPOUND 5
88
89/*
90 * Default number of credits to keep available for SMB3.
91 * This value is chosen somewhat arbitrarily. The Windows client
92 * defaults to 128 credits, the Windows server allows clients up to
93 * 512 credits (or 8K for later versions), and the NetApp server
94 * does not limit clients at all. Choose a high enough default value
95 * such that the client shouldn't limit performance, but allow mount
96 * to override (until you approach 64K, where we limit credits to 65000
97 * to reduce possibility of seeing more server credit overflow bugs.
98 */
99#define SMB2_MAX_CREDITS_AVAILABLE 32000
100
101#include "cifspdu.h"
102
103#ifndef XATTR_DOS_ATTRIB
104#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
105#endif
106
107/*
108 * CIFS vfs client Status information (based on what we know.)
109 */
110
111/* associated with each tcp and smb session */
112enum statusEnum {
113 CifsNew = 0,
114 CifsGood,
115 CifsExiting,
116 CifsNeedReconnect,
117 CifsNeedNegotiate
118};
119
120enum securityEnum {
121 Unspecified = 0, /* not specified */
122 LANMAN, /* Legacy LANMAN auth */
123 NTLM, /* Legacy NTLM012 auth with NTLM hash */
124 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
125 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
126 Kerberos, /* Kerberos via SPNEGO */
127};
128
129struct session_key {
130 unsigned int len;
131 char *response;
132};
133
134/* crypto security descriptor definition */
135struct sdesc {
136 struct shash_desc shash;
137 char ctx[];
138};
139
140/* crypto hashing related structure/fields, not specific to a sec mech */
141struct cifs_secmech {
142 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
143 struct crypto_shash *md5; /* md5 hash function */
144 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
145 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
146 struct crypto_shash *sha512; /* sha512 hash function */
147 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
148 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
149 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
150 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
151 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
152 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
153 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
154};
155
156/* per smb session structure/fields */
157struct ntlmssp_auth {
158 bool sesskey_per_smbsess; /* whether session key is per smb session */
159 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
160 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
161 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
162 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
163};
164
165struct cifs_cred {
166 int uid;
167 int gid;
168 int mode;
169 int cecount;
170 struct cifs_sid osid;
171 struct cifs_sid gsid;
172 struct cifs_ntace *ntaces;
173 struct cifs_ace *aces;
174};
175
176/*
177 *****************************************************************
178 * Except the CIFS PDUs themselves all the
179 * globally interesting structs should go here
180 *****************************************************************
181 */
182
183/*
184 * A smb_rqst represents a complete request to be issued to a server. It's
185 * formed by a kvec array, followed by an array of pages. Page data is assumed
186 * to start at the beginning of the first page.
187 */
188struct smb_rqst {
189 struct kvec *rq_iov; /* array of kvecs */
190 unsigned int rq_nvec; /* number of kvecs in array */
191 struct page **rq_pages; /* pointer to array of page ptrs */
192 unsigned int rq_offset; /* the offset to the 1st page */
193 unsigned int rq_npages; /* number pages in array */
194 unsigned int rq_pagesz; /* page size to use */
195 unsigned int rq_tailsz; /* length of last page */
196};
197
198enum smb_version {
199 Smb_1 = 1,
200 Smb_20,
201 Smb_21,
202 Smb_30,
203 Smb_302,
204 Smb_311,
205 Smb_3any,
206 Smb_default,
207 Smb_version_err
208};
209
210struct mid_q_entry;
211struct TCP_Server_Info;
212struct cifsFileInfo;
213struct cifs_ses;
214struct cifs_tcon;
215struct dfs_info3_param;
216struct cifs_fattr;
217struct smb_vol;
218struct cifs_fid;
219struct cifs_readdata;
220struct cifs_writedata;
221struct cifs_io_parms;
222struct cifs_search_info;
223struct cifsInodeInfo;
224struct cifs_open_parms;
225struct cifs_credits;
226
227struct smb_version_operations {
228 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
229 struct mid_q_entry *);
230 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
231 /* setup request: allocate mid, sign message */
232 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
233 struct smb_rqst *);
234 /* setup async request: allocate mid, sign message */
235 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
236 struct smb_rqst *);
237 /* check response: verify signature, map error */
238 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
239 bool);
240 void (*add_credits)(struct TCP_Server_Info *server,
241 const struct cifs_credits *credits,
242 const int optype);
243 void (*set_credits)(struct TCP_Server_Info *, const int);
244 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
245 unsigned int (*get_credits)(struct mid_q_entry *);
246 __u64 (*get_next_mid)(struct TCP_Server_Info *);
247 void (*revert_current_mid)(struct TCP_Server_Info *server,
248 const unsigned int val);
249 /* data offset from read response message */
250 unsigned int (*read_data_offset)(char *);
251 /*
252 * Data length from read response message
253 * When in_remaining is true, the returned data length is in
254 * message field DataRemaining for out-of-band data read (e.g through
255 * Memory Registration RDMA write in SMBD).
256 * Otherwise, the returned data length is in message field DataLength.
257 */
258 unsigned int (*read_data_length)(char *, bool in_remaining);
259 /* map smb to linux error */
260 int (*map_error)(char *, bool);
261 /* find mid corresponding to the response message */
262 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
263 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
264 void (*clear_stats)(struct cifs_tcon *);
265 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
266 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
267 /* verify the message */
268 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
269 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
270 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
271 void (*downgrade_oplock)(struct TCP_Server_Info *,
272 struct cifsInodeInfo *, bool);
273 /* process transaction2 response */
274 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
275 char *, int);
276 /* check if we need to negotiate */
277 bool (*need_neg)(struct TCP_Server_Info *);
278 /* negotiate to the server */
279 int (*negotiate)(const unsigned int, struct cifs_ses *);
280 /* set negotiated write size */
281 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
282 /* set negotiated read size */
283 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
284 /* setup smb sessionn */
285 int (*sess_setup)(const unsigned int, struct cifs_ses *,
286 const struct nls_table *);
287 /* close smb session */
288 int (*logoff)(const unsigned int, struct cifs_ses *);
289 /* connect to a server share */
290 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
291 struct cifs_tcon *, const struct nls_table *);
292 /* close tree connecion */
293 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
294 /* get DFS referrals */
295 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
296 const char *, struct dfs_info3_param **,
297 unsigned int *, const struct nls_table *, int);
298 /* informational QFS call */
299 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
300 /* check if a path is accessible or not */
301 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
302 struct cifs_sb_info *, const char *);
303 /* query path data from the server */
304 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
305 struct cifs_sb_info *, const char *,
306 FILE_ALL_INFO *, bool *, bool *);
307 /* query file data from the server */
308 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
309 struct cifs_fid *, FILE_ALL_INFO *);
310 /* get server index number */
311 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
312 struct cifs_sb_info *, const char *,
313 u64 *uniqueid, FILE_ALL_INFO *);
314 /* set size by path */
315 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
316 const char *, __u64, struct cifs_sb_info *, bool);
317 /* set size by file handle */
318 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
319 struct cifsFileInfo *, __u64, bool);
320 /* set attributes */
321 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
322 const unsigned int);
323 int (*set_compression)(const unsigned int, struct cifs_tcon *,
324 struct cifsFileInfo *);
325 /* check if we can send an echo or nor */
326 bool (*can_echo)(struct TCP_Server_Info *);
327 /* send echo request */
328 int (*echo)(struct TCP_Server_Info *);
329 /* create directory */
330 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
331 umode_t mode, struct cifs_tcon *tcon,
332 const char *full_path,
333 struct cifs_sb_info *cifs_sb);
334 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
335 struct cifs_tcon *tcon, const char *name,
336 struct cifs_sb_info *sb);
337 /* set info on created directory */
338 void (*mkdir_setinfo)(struct inode *, const char *,
339 struct cifs_sb_info *, struct cifs_tcon *,
340 const unsigned int);
341 /* remove directory */
342 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
343 struct cifs_sb_info *);
344 /* unlink file */
345 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
346 struct cifs_sb_info *);
347 /* open, rename and delete file */
348 int (*rename_pending_delete)(const char *, struct dentry *,
349 const unsigned int);
350 /* send rename request */
351 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
352 const char *, struct cifs_sb_info *);
353 /* send create hardlink request */
354 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
355 const char *, const char *,
356 struct cifs_sb_info *);
357 /* query symlink target */
358 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
359 struct cifs_sb_info *, const char *,
360 char **, bool);
361 /* open a file for non-posix mounts */
362 int (*open)(const unsigned int, struct cifs_open_parms *,
363 __u32 *, FILE_ALL_INFO *);
364 /* set fid protocol-specific info */
365 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
366 /* close a file */
367 void (*close)(const unsigned int, struct cifs_tcon *,
368 struct cifs_fid *);
369 /* send a flush request to the server */
370 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
371 /* async read from the server */
372 int (*async_readv)(struct cifs_readdata *);
373 /* async write to the server */
374 int (*async_writev)(struct cifs_writedata *,
375 void (*release)(struct kref *));
376 /* sync read from the server */
377 int (*sync_read)(const unsigned int, struct cifs_fid *,
378 struct cifs_io_parms *, unsigned int *, char **,
379 int *);
380 /* sync write to the server */
381 int (*sync_write)(const unsigned int, struct cifs_fid *,
382 struct cifs_io_parms *, unsigned int *, struct kvec *,
383 unsigned long);
384 /* open dir, start readdir */
385 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
386 const char *, struct cifs_sb_info *,
387 struct cifs_fid *, __u16,
388 struct cifs_search_info *);
389 /* continue readdir */
390 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
391 struct cifs_fid *,
392 __u16, struct cifs_search_info *srch_inf);
393 /* close dir */
394 int (*close_dir)(const unsigned int, struct cifs_tcon *,
395 struct cifs_fid *);
396 /* calculate a size of SMB message */
397 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
398 /* check for STATUS_PENDING and process the response if yes */
399 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
400 /* check for STATUS_NETWORK_SESSION_EXPIRED */
401 bool (*is_session_expired)(char *);
402 /* send oplock break response */
403 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
404 struct cifsInodeInfo *);
405 /* query remote filesystem */
406 int (*queryfs)(const unsigned int, struct cifs_tcon *,
407 struct kstatfs *);
408 /* send mandatory brlock to the server */
409 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
410 __u64, __u32, int, int, bool);
411 /* unlock range of mandatory locks */
412 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
413 const unsigned int);
414 /* push brlocks from the cache to the server */
415 int (*push_mand_locks)(struct cifsFileInfo *);
416 /* get lease key of the inode */
417 void (*get_lease_key)(struct inode *, struct cifs_fid *);
418 /* set lease key of the inode */
419 void (*set_lease_key)(struct inode *, struct cifs_fid *);
420 /* generate new lease key */
421 void (*new_lease_key)(struct cifs_fid *);
422 int (*generate_signingkey)(struct cifs_ses *);
423 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
424 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
425 struct cifsFileInfo *src_file);
426 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
427 struct cifsFileInfo *src_file, void __user *);
428 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
429 struct cifs_sb_info *, const unsigned char *,
430 char *, unsigned int *);
431 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
432 struct cifs_sb_info *, const unsigned char *,
433 char *, unsigned int *);
434 /* if we can do cache read operations */
435 bool (*is_read_op)(__u32);
436 /* set oplock level for the inode */
437 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
438 bool *);
439 /* create lease context buffer for CREATE request */
440 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
441 /* parse lease context buffer and return oplock/epoch info */
442 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
443 ssize_t (*copychunk_range)(const unsigned int,
444 struct cifsFileInfo *src_file,
445 struct cifsFileInfo *target_file,
446 u64 src_off, u64 len, u64 dest_off);
447 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
448 struct cifsFileInfo *target_file, u64 src_off, u64 len,
449 u64 dest_off);
450 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
451 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
452 const unsigned char *, const unsigned char *, char *,
453 size_t, struct cifs_sb_info *);
454 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
455 const char *, const void *, const __u16,
456 const struct nls_table *, struct cifs_sb_info *);
457 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
458 const char *, u32 *);
459 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
460 const struct cifs_fid *, u32 *);
461 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
462 int);
463 /* writepages retry size */
464 unsigned int (*wp_retry_size)(struct inode *);
465 /* get mtu credits */
466 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
467 unsigned int *, struct cifs_credits *);
468 /* adjust previously taken mtu credits to request size */
469 int (*adjust_credits)(struct TCP_Server_Info *server,
470 struct cifs_credits *credits,
471 const unsigned int payload_size);
472 /* check if we need to issue closedir */
473 bool (*dir_needs_close)(struct cifsFileInfo *);
474 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
475 loff_t);
476 /* init transform request - used for encryption for now */
477 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
478 struct smb_rqst *, struct smb_rqst *);
479 int (*is_transform_hdr)(void *buf);
480 int (*receive_transform)(struct TCP_Server_Info *,
481 struct mid_q_entry **, char **, int *);
482 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
483 enum securityEnum);
484 int (*next_header)(char *);
485 /* ioctl passthrough for query_info */
486 int (*ioctl_query_info)(const unsigned int xid,
487 struct cifs_tcon *tcon,
488 __le16 *path, int is_dir,
489 unsigned long p);
490 /* make unix special files (block, char, fifo, socket) */
491 int (*make_node)(unsigned int xid,
492 struct inode *inode,
493 struct dentry *dentry,
494 struct cifs_tcon *tcon,
495 char *full_path,
496 umode_t mode,
497 dev_t device_number);
498 /* version specific fiemap implementation */
499 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
500 struct fiemap_extent_info *, u64, u64);
501 /* version specific llseek implementation */
502 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
503};
504
505struct smb_version_values {
506 char *version_string;
507 __u16 protocol_id;
508 __u32 req_capabilities;
509 __u32 large_lock_type;
510 __u32 exclusive_lock_type;
511 __u32 shared_lock_type;
512 __u32 unlock_lock_type;
513 size_t header_preamble_size;
514 size_t header_size;
515 size_t max_header_size;
516 size_t read_rsp_size;
517 __le16 lock_cmd;
518 unsigned int cap_unix;
519 unsigned int cap_nt_find;
520 unsigned int cap_large_files;
521 __u16 signing_enabled;
522 __u16 signing_required;
523 size_t create_lease_size;
524};
525
526#define HEADER_SIZE(server) (server->vals->header_size)
527#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
528
529struct smb_vol {
530 char *username;
531 char *password;
532 char *domainname;
533 char *UNC;
534 char *iocharset; /* local code page for mapping to and from Unicode */
535 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
536 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
537 kuid_t cred_uid;
538 kuid_t linux_uid;
539 kgid_t linux_gid;
540 kuid_t backupuid;
541 kgid_t backupgid;
542 umode_t file_mode;
543 umode_t dir_mode;
544 enum securityEnum sectype; /* sectype requested via mnt opts */
545 bool sign; /* was signing requested via mnt opts? */
546 bool ignore_signature:1;
547 bool retry:1;
548 bool intr:1;
549 bool setuids:1;
550 bool setuidfromacl:1;
551 bool override_uid:1;
552 bool override_gid:1;
553 bool dynperm:1;
554 bool noperm:1;
555 bool mode_ace:1;
556 bool no_psx_acl:1; /* set if posix acl support should be disabled */
557 bool cifs_acl:1;
558 bool backupuid_specified; /* mount option backupuid is specified */
559 bool backupgid_specified; /* mount option backupgid is specified */
560 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
561 bool server_ino:1; /* use inode numbers from server ie UniqueId */
562 bool direct_io:1;
563 bool strict_io:1; /* strict cache behavior */
564 bool cache_ro:1;
565 bool cache_rw:1;
566 bool remap:1; /* set to remap seven reserved chars in filenames */
567 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
568 bool posix_paths:1; /* unset to not ask for posix pathnames. */
569 bool no_linux_ext:1;
570 bool linux_ext:1;
571 bool sfu_emul:1;
572 bool nullauth:1; /* attempt to authenticate with null user */
573 bool nocase:1; /* request case insensitive filenames */
574 bool nobrl:1; /* disable sending byte range locks to srv */
575 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
576 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
577 bool seal:1; /* request transport encryption on share */
578 bool nodfs:1; /* Do not request DFS, even if available */
579 bool local_lease:1; /* check leases only on local system, not remote */
580 bool noblocksnd:1;
581 bool noautotune:1;
582 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
583 bool no_lease:1; /* disable requesting leases */
584 bool fsc:1; /* enable fscache */
585 bool mfsymlinks:1; /* use Minshall+French Symlinks */
586 bool multiuser:1;
587 bool rwpidforward:1; /* pid forward for read/write operations */
588 bool nosharesock:1;
589 bool persistent:1;
590 bool nopersistent:1;
591 bool resilient:1; /* noresilient not required since not fored for CA */
592 bool domainauto:1;
593 bool rdma:1;
594 unsigned int bsize;
595 unsigned int rsize;
596 unsigned int wsize;
597 unsigned int min_offload;
598 bool sockopt_tcp_nodelay:1;
599 unsigned long actimeo; /* attribute cache timeout (jiffies) */
600 struct smb_version_operations *ops;
601 struct smb_version_values *vals;
602 char *prepath;
603 struct sockaddr_storage dstaddr; /* destination address */
604 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
605 struct nls_table *local_nls;
606 unsigned int echo_interval; /* echo interval in secs */
607 __u64 snapshot_time; /* needed for timewarp tokens */
608 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
609 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
610 __u16 compression; /* compression algorithm 0xFFFF default 0=disabled */
611 bool rootfs:1; /* if it's a SMB root file system */
612};
613
614/**
615 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
616 * trying to reuse existing superblock for a new mount
617 */
618#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
619 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
620 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
621 CIFS_MOUNT_MAP_SFM_CHR | \
622 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
623 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
624 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
625 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
626 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
627 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
628 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
629 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
630 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
631 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
632
633/**
634 * Generic VFS superblock mount flags (s_flags) to consider when
635 * trying to reuse existing superblock for a new mount
636 */
637#define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
638 SB_NODEV | SB_SYNCHRONOUS)
639
640struct cifs_mnt_data {
641 struct cifs_sb_info *cifs_sb;
642 struct smb_vol *vol;
643 int flags;
644};
645
646static inline unsigned int
647get_rfc1002_length(void *buf)
648{
649 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
650}
651
652static inline void
653inc_rfc1001_len(void *buf, int count)
654{
655 be32_add_cpu((__be32 *)buf, count);
656}
657
658struct TCP_Server_Info {
659 struct list_head tcp_ses_list;
660 struct list_head smb_ses_list;
661 int srv_count; /* reference counter */
662 /* 15 character server name + 0x20 16th byte indicating type = srv */
663 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
664 struct smb_version_operations *ops;
665 struct smb_version_values *vals;
666 enum statusEnum tcpStatus; /* what we think the status is */
667 char *hostname; /* hostname portion of UNC string */
668 struct socket *ssocket;
669 struct sockaddr_storage dstaddr;
670 struct sockaddr_storage srcaddr; /* locally bind to this IP */
671#ifdef CONFIG_NET_NS
672 struct net *net;
673#endif
674 wait_queue_head_t response_q;
675 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
676 struct list_head pending_mid_q;
677 bool noblocksnd; /* use blocking sendmsg */
678 bool noautotune; /* do not autotune send buf sizes */
679 bool tcp_nodelay;
680 unsigned int credits; /* send no more requests at once */
681 unsigned int max_credits; /* can override large 32000 default at mnt */
682 unsigned int in_flight; /* number of requests on the wire to server */
683 unsigned int max_in_flight; /* max number of requests that were on wire */
684 spinlock_t req_lock; /* protect the two values above */
685 struct mutex srv_mutex;
686 struct task_struct *tsk;
687 char server_GUID[16];
688 __u16 sec_mode;
689 bool sign; /* is signing enabled on this connection? */
690 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
691 bool session_estab; /* mark when very first sess is established */
692 int echo_credits; /* echo reserved slots */
693 int oplock_credits; /* oplock break reserved slots */
694 bool echoes:1; /* enable echoes */
695 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
696 u16 dialect; /* dialect index that server chose */
697 bool oplocks:1; /* enable oplocks */
698 unsigned int maxReq; /* Clients should submit no more */
699 /* than maxReq distinct unanswered SMBs to the server when using */
700 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
701 unsigned int maxBuf; /* maxBuf specifies the maximum */
702 /* message size the server can send or receive for non-raw SMBs */
703 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
704 /* when socket is setup (and during reconnect) before NegProt sent */
705 unsigned int max_rw; /* maxRw specifies the maximum */
706 /* message size the server can send or receive for */
707 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
708 unsigned int capabilities; /* selective disabling of caps by smb sess */
709 int timeAdj; /* Adjust for difference in server time zone in sec */
710 __u64 CurrentMid; /* multiplex id - rotating counter */
711 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
712 /* 16th byte of RFC1001 workstation name is always null */
713 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
714 __u32 sequence_number; /* for signing, protected by srv_mutex */
715 __u32 reconnect_instance; /* incremented on each reconnect */
716 struct session_key session_key;
717 unsigned long lstrp; /* when we got last response from this server */
718 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
719#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
720#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
721#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
722 char negflavor; /* NEGOTIATE response flavor */
723 /* extended security flavors that server supports */
724 bool sec_ntlmssp; /* supports NTLMSSP */
725 bool sec_kerberosu2u; /* supports U2U Kerberos */
726 bool sec_kerberos; /* supports plain Kerberos */
727 bool sec_mskerberos; /* supports legacy MS Kerberos */
728 bool large_buf; /* is current buffer large? */
729 /* use SMBD connection instead of socket */
730 bool rdma;
731 /* point to the SMBD connection if RDMA is used instead of socket */
732 struct smbd_connection *smbd_conn;
733 struct delayed_work echo; /* echo ping workqueue job */
734 char *smallbuf; /* pointer to current "small" buffer */
735 char *bigbuf; /* pointer to current "big" buffer */
736 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
737 unsigned int pdu_size;
738 unsigned int total_read; /* total amount of data read in this pass */
739#ifdef CONFIG_CIFS_FSCACHE
740 struct fscache_cookie *fscache; /* client index cache cookie */
741#endif
742#ifdef CONFIG_CIFS_STATS2
743 atomic_t in_send; /* requests trying to send */
744 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
745 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
746 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
747 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
748 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
749 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
750#endif /* STATS2 */
751 unsigned int max_read;
752 unsigned int max_write;
753 unsigned int min_offload;
754 __le16 compress_algorithm;
755 __le16 cipher_type;
756 /* save initital negprot hash */
757 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
758 bool posix_ext_supported;
759 struct delayed_work reconnect; /* reconnect workqueue job */
760 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
761 unsigned long echo_interval;
762
763 /*
764 * Number of targets available for reconnect. The more targets
765 * the more tasks have to wait to let the demultiplex thread
766 * reconnect.
767 */
768 int nr_targets;
769 bool noblockcnt; /* use non-blocking connect() */
770};
771
772struct cifs_credits {
773 unsigned int value;
774 unsigned int instance;
775};
776
777static inline unsigned int
778in_flight(struct TCP_Server_Info *server)
779{
780 unsigned int num;
781 spin_lock(&server->req_lock);
782 num = server->in_flight;
783 spin_unlock(&server->req_lock);
784 return num;
785}
786
787static inline bool
788has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
789{
790 int num;
791 spin_lock(&server->req_lock);
792 num = *credits;
793 spin_unlock(&server->req_lock);
794 return num >= num_credits;
795}
796
797static inline void
798add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
799 const int optype)
800{
801 server->ops->add_credits(server, credits, optype);
802}
803
804static inline void
805add_credits_and_wake_if(struct TCP_Server_Info *server,
806 const struct cifs_credits *credits, const int optype)
807{
808 if (credits->value) {
809 server->ops->add_credits(server, credits, optype);
810 wake_up(&server->request_q);
811 }
812}
813
814static inline void
815set_credits(struct TCP_Server_Info *server, const int val)
816{
817 server->ops->set_credits(server, val);
818}
819
820static inline int
821adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
822 const unsigned int payload_size)
823{
824 return server->ops->adjust_credits ?
825 server->ops->adjust_credits(server, credits, payload_size) : 0;
826}
827
828static inline __le64
829get_next_mid64(struct TCP_Server_Info *server)
830{
831 return cpu_to_le64(server->ops->get_next_mid(server));
832}
833
834static inline __le16
835get_next_mid(struct TCP_Server_Info *server)
836{
837 __u16 mid = server->ops->get_next_mid(server);
838 /*
839 * The value in the SMB header should be little endian for easy
840 * on-the-wire decoding.
841 */
842 return cpu_to_le16(mid);
843}
844
845static inline void
846revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
847{
848 if (server->ops->revert_current_mid)
849 server->ops->revert_current_mid(server, val);
850}
851
852static inline void
853revert_current_mid_from_hdr(struct TCP_Server_Info *server,
854 const struct smb2_sync_hdr *shdr)
855{
856 unsigned int num = le16_to_cpu(shdr->CreditCharge);
857
858 return revert_current_mid(server, num > 0 ? num : 1);
859}
860
861static inline __u16
862get_mid(const struct smb_hdr *smb)
863{
864 return le16_to_cpu(smb->Mid);
865}
866
867static inline bool
868compare_mid(__u16 mid, const struct smb_hdr *smb)
869{
870 return mid == le16_to_cpu(smb->Mid);
871}
872
873/*
874 * When the server supports very large reads and writes via POSIX extensions,
875 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
876 * including the RFC1001 length.
877 *
878 * Note that this might make for "interesting" allocation problems during
879 * writeback however as we have to allocate an array of pointers for the
880 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
881 *
882 * For reads, there is a similar problem as we need to allocate an array
883 * of kvecs to handle the receive, though that should only need to be done
884 * once.
885 */
886#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
887#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
888
889/*
890 * When the server doesn't allow large posix writes, only allow a rsize/wsize
891 * of 2^17-1 minus the size of the call header. That allows for a read or
892 * write up to the maximum size described by RFC1002.
893 */
894#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
895#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
896
897/*
898 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
899 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
900 * a single wsize request with a single call.
901 */
902#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
903#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
904
905/*
906 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
907 * those values when posix extensions aren't in force. In actuality here, we
908 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
909 * to be ok with the extra byte even though Windows doesn't send writes that
910 * are that large.
911 *
912 * Citation:
913 *
914 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
915 */
916#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
917#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
918
919/*
920 * Macros to allow the TCP_Server_Info->net field and related code to drop out
921 * when CONFIG_NET_NS isn't set.
922 */
923
924#ifdef CONFIG_NET_NS
925
926static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
927{
928 return srv->net;
929}
930
931static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
932{
933 srv->net = net;
934}
935
936#else
937
938static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
939{
940 return &init_net;
941}
942
943static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
944{
945}
946
947#endif
948
949struct cifs_server_iface {
950 size_t speed;
951 unsigned int rdma_capable : 1;
952 unsigned int rss_capable : 1;
953 struct sockaddr_storage sockaddr;
954};
955
956/*
957 * Session structure. One of these for each uid session with a particular host
958 */
959struct cifs_ses {
960 struct list_head smb_ses_list;
961 struct list_head tcon_list;
962 struct cifs_tcon *tcon_ipc;
963 struct mutex session_mutex;
964 struct TCP_Server_Info *server; /* pointer to server info */
965 int ses_count; /* reference counter */
966 enum statusEnum status;
967 unsigned overrideSecFlg; /* if non-zero override global sec flags */
968 char *serverOS; /* name of operating system underlying server */
969 char *serverNOS; /* name of network operating system of server */
970 char *serverDomain; /* security realm of server */
971 __u64 Suid; /* remote smb uid */
972 kuid_t linux_uid; /* overriding owner of files on the mount */
973 kuid_t cred_uid; /* owner of credentials */
974 unsigned int capabilities;
975 char serverName[SERVER_NAME_LEN_WITH_NULL];
976 char *user_name; /* must not be null except during init of sess
977 and after mount option parsing we fill it */
978 char *domainName;
979 char *password;
980 struct session_key auth_key;
981 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
982 enum securityEnum sectype; /* what security flavor was specified? */
983 bool sign; /* is signing required? */
984 bool need_reconnect:1; /* connection reset, uid now invalid */
985 bool domainAuto:1;
986 __u16 session_flags;
987 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
988 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
989 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
990 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
991
992 /*
993 * Network interfaces available on the server this session is
994 * connected to.
995 *
996 * Other channels can be opened by connecting and binding this
997 * session to interfaces from this list.
998 *
999 * iface_lock should be taken when accessing any of these fields
1000 */
1001 spinlock_t iface_lock;
1002 struct cifs_server_iface *iface_list;
1003 size_t iface_count;
1004 unsigned long iface_last_update; /* jiffies */
1005};
1006
1007static inline bool
1008cap_unix(struct cifs_ses *ses)
1009{
1010 return ses->server->vals->cap_unix & ses->capabilities;
1011}
1012
1013struct cached_fid {
1014 bool is_valid:1; /* Do we have a useable root fid */
1015 bool file_all_info_is_valid:1;
1016
1017 struct kref refcount;
1018 struct cifs_fid *fid;
1019 struct mutex fid_mutex;
1020 struct cifs_tcon *tcon;
1021 struct work_struct lease_break;
1022 struct smb2_file_all_info file_all_info;
1023};
1024
1025/*
1026 * there is one of these for each connection to a resource on a particular
1027 * session
1028 */
1029struct cifs_tcon {
1030 struct list_head tcon_list;
1031 int tc_count;
1032 struct list_head rlist; /* reconnect list */
1033 atomic_t num_local_opens; /* num of all opens including disconnected */
1034 atomic_t num_remote_opens; /* num of all network opens on server */
1035 struct list_head openFileList;
1036 spinlock_t open_file_lock; /* protects list above */
1037 struct cifs_ses *ses; /* pointer to session associated with */
1038 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1039 char *nativeFileSystem;
1040 char *password; /* for share-level security */
1041 __u32 tid; /* The 4 byte tree id */
1042 __u16 Flags; /* optional support bits */
1043 enum statusEnum tidStatus;
1044 atomic_t num_smbs_sent;
1045 union {
1046 struct {
1047 atomic_t num_writes;
1048 atomic_t num_reads;
1049 atomic_t num_flushes;
1050 atomic_t num_oplock_brks;
1051 atomic_t num_opens;
1052 atomic_t num_closes;
1053 atomic_t num_deletes;
1054 atomic_t num_mkdirs;
1055 atomic_t num_posixopens;
1056 atomic_t num_posixmkdirs;
1057 atomic_t num_rmdirs;
1058 atomic_t num_renames;
1059 atomic_t num_t2renames;
1060 atomic_t num_ffirst;
1061 atomic_t num_fnext;
1062 atomic_t num_fclose;
1063 atomic_t num_hardlinks;
1064 atomic_t num_symlinks;
1065 atomic_t num_locks;
1066 atomic_t num_acl_get;
1067 atomic_t num_acl_set;
1068 } cifs_stats;
1069 struct {
1070 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1071 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1072 } smb2_stats;
1073 } stats;
1074 __u64 bytes_read;
1075 __u64 bytes_written;
1076 spinlock_t stat_lock; /* protects the two fields above */
1077 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1078 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1079 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1080 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1081 bool pipe:1; /* set if connection to pipe share */
1082 bool print:1; /* set if connection to printer share */
1083 bool retry:1;
1084 bool nocase:1;
1085 bool nohandlecache:1; /* if strange server resource prob can turn off */
1086 bool seal:1; /* transport encryption for this mounted share */
1087 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1088 for this mount even if server would support */
1089 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1090 bool local_lease:1; /* check leases (only) on local system not remote */
1091 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1092 bool broken_sparse_sup; /* if server or share does not support sparse */
1093 bool need_reconnect:1; /* connection reset, tid now invalid */
1094 bool need_reopen_files:1; /* need to reopen tcon file handles */
1095 bool use_resilient:1; /* use resilient instead of durable handles */
1096 bool use_persistent:1; /* use persistent instead of durable handles */
1097 bool no_lease:1; /* Do not request leases on files or directories */
1098 __le32 capabilities;
1099 __u32 share_flags;
1100 __u32 maximal_access;
1101 __u32 vol_serial_number;
1102 __le64 vol_create_time;
1103 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1104 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1105 __u32 ss_flags; /* sector size flags */
1106 __u32 perf_sector_size; /* best sector size for perf */
1107 __u32 max_chunks;
1108 __u32 max_bytes_chunk;
1109 __u32 max_bytes_copy;
1110#ifdef CONFIG_CIFS_FSCACHE
1111 u64 resource_id; /* server resource id */
1112 struct fscache_cookie *fscache; /* cookie for share */
1113#endif
1114 struct list_head pending_opens; /* list of incomplete opens */
1115 struct cached_fid crfid; /* Cached root fid */
1116 /* BB add field for back pointer to sb struct(s)? */
1117#ifdef CONFIG_CIFS_DFS_UPCALL
1118 char *dfs_path;
1119 int remap:2;
1120 struct list_head ulist; /* cache update list */
1121#endif
1122};
1123
1124/*
1125 * This is a refcounted and timestamped container for a tcon pointer. The
1126 * container holds a tcon reference. It is considered safe to free one of
1127 * these when the tl_count goes to 0. The tl_time is the time of the last
1128 * "get" on the container.
1129 */
1130struct tcon_link {
1131 struct rb_node tl_rbnode;
1132 kuid_t tl_uid;
1133 unsigned long tl_flags;
1134#define TCON_LINK_MASTER 0
1135#define TCON_LINK_PENDING 1
1136#define TCON_LINK_IN_TREE 2
1137 unsigned long tl_time;
1138 atomic_t tl_count;
1139 struct cifs_tcon *tl_tcon;
1140};
1141
1142extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1143extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1144
1145static inline struct cifs_tcon *
1146tlink_tcon(struct tcon_link *tlink)
1147{
1148 return tlink->tl_tcon;
1149}
1150
1151static inline struct tcon_link *
1152cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1153{
1154 return cifs_sb->master_tlink;
1155}
1156
1157extern void cifs_put_tlink(struct tcon_link *tlink);
1158
1159static inline struct tcon_link *
1160cifs_get_tlink(struct tcon_link *tlink)
1161{
1162 if (tlink && !IS_ERR(tlink))
1163 atomic_inc(&tlink->tl_count);
1164 return tlink;
1165}
1166
1167/* This function is always expected to succeed */
1168extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1169
1170#define CIFS_OPLOCK_NO_CHANGE 0xfe
1171
1172struct cifs_pending_open {
1173 struct list_head olist;
1174 struct tcon_link *tlink;
1175 __u8 lease_key[16];
1176 __u32 oplock;
1177};
1178
1179/*
1180 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1181 * This is used to track byte stream locks on the file
1182 */
1183struct cifsLockInfo {
1184 struct list_head llist; /* pointer to next cifsLockInfo */
1185 struct list_head blist; /* pointer to locks blocked on this */
1186 wait_queue_head_t block_q;
1187 __u64 offset;
1188 __u64 length;
1189 __u32 pid;
1190 __u16 type;
1191 __u16 flags;
1192};
1193
1194/*
1195 * One of these for each open instance of a file
1196 */
1197struct cifs_search_info {
1198 loff_t index_of_last_entry;
1199 __u16 entries_in_buffer;
1200 __u16 info_level;
1201 __u32 resume_key;
1202 char *ntwrk_buf_start;
1203 char *srch_entries_start;
1204 char *last_entry;
1205 const char *presume_name;
1206 unsigned int resume_name_len;
1207 bool endOfSearch:1;
1208 bool emptyDir:1;
1209 bool unicode:1;
1210 bool smallBuf:1; /* so we know which buf_release function to call */
1211};
1212
1213#define ACL_NO_MODE ((umode_t)(-1))
1214struct cifs_open_parms {
1215 struct cifs_tcon *tcon;
1216 struct cifs_sb_info *cifs_sb;
1217 int disposition;
1218 int desired_access;
1219 int create_options;
1220 const char *path;
1221 struct cifs_fid *fid;
1222 umode_t mode;
1223 bool reconnect:1;
1224};
1225
1226struct cifs_fid {
1227 __u16 netfid;
1228 __u64 persistent_fid; /* persist file id for smb2 */
1229 __u64 volatile_fid; /* volatile file id for smb2 */
1230 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1231 __u8 create_guid[16];
1232 struct cifs_pending_open *pending_open;
1233 unsigned int epoch;
1234#ifdef CONFIG_CIFS_DEBUG2
1235 __u64 mid;
1236#endif /* CIFS_DEBUG2 */
1237 bool purge_cache;
1238};
1239
1240struct cifs_fid_locks {
1241 struct list_head llist;
1242 struct cifsFileInfo *cfile; /* fid that owns locks */
1243 struct list_head locks; /* locks held by fid above */
1244};
1245
1246struct cifsFileInfo {
1247 /* following two lists are protected by tcon->open_file_lock */
1248 struct list_head tlist; /* pointer to next fid owned by tcon */
1249 struct list_head flist; /* next fid (file instance) for this inode */
1250 /* lock list below protected by cifsi->lock_sem */
1251 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1252 kuid_t uid; /* allows finding which FileInfo structure */
1253 __u32 pid; /* process id who opened file */
1254 struct cifs_fid fid; /* file id from remote */
1255 struct list_head rlist; /* reconnect list */
1256 /* BB add lock scope info here if needed */ ;
1257 /* lock scope id (0 if none) */
1258 struct dentry *dentry;
1259 struct tcon_link *tlink;
1260 unsigned int f_flags;
1261 bool invalidHandle:1; /* file closed via session abend */
1262 bool oplock_break_cancelled:1;
1263 int count;
1264 spinlock_t file_info_lock; /* protects four flag/count fields above */
1265 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1266 struct cifs_search_info srch_inf;
1267 struct work_struct oplock_break; /* work for oplock breaks */
1268};
1269
1270struct cifs_io_parms {
1271 __u16 netfid;
1272 __u64 persistent_fid; /* persist file id for smb2 */
1273 __u64 volatile_fid; /* volatile file id for smb2 */
1274 __u32 pid;
1275 __u64 offset;
1276 unsigned int length;
1277 struct cifs_tcon *tcon;
1278};
1279
1280struct cifs_aio_ctx {
1281 struct kref refcount;
1282 struct list_head list;
1283 struct mutex aio_mutex;
1284 struct completion done;
1285 struct iov_iter iter;
1286 struct kiocb *iocb;
1287 struct cifsFileInfo *cfile;
1288 struct bio_vec *bv;
1289 loff_t pos;
1290 unsigned int npages;
1291 ssize_t rc;
1292 unsigned int len;
1293 unsigned int total_len;
1294 bool should_dirty;
1295 /*
1296 * Indicates if this aio_ctx is for direct_io,
1297 * If yes, iter is a copy of the user passed iov_iter
1298 */
1299 bool direct_io;
1300};
1301
1302struct cifs_readdata;
1303
1304/* asynchronous read support */
1305struct cifs_readdata {
1306 struct kref refcount;
1307 struct list_head list;
1308 struct completion done;
1309 struct cifsFileInfo *cfile;
1310 struct address_space *mapping;
1311 struct cifs_aio_ctx *ctx;
1312 __u64 offset;
1313 unsigned int bytes;
1314 unsigned int got_bytes;
1315 pid_t pid;
1316 int result;
1317 struct work_struct work;
1318 int (*read_into_pages)(struct TCP_Server_Info *server,
1319 struct cifs_readdata *rdata,
1320 unsigned int len);
1321 int (*copy_into_pages)(struct TCP_Server_Info *server,
1322 struct cifs_readdata *rdata,
1323 struct iov_iter *iter);
1324 struct kvec iov[2];
1325#ifdef CONFIG_CIFS_SMB_DIRECT
1326 struct smbd_mr *mr;
1327#endif
1328 unsigned int pagesz;
1329 unsigned int page_offset;
1330 unsigned int tailsz;
1331 struct cifs_credits credits;
1332 unsigned int nr_pages;
1333 struct page **pages;
1334};
1335
1336struct cifs_writedata;
1337
1338/* asynchronous write support */
1339struct cifs_writedata {
1340 struct kref refcount;
1341 struct list_head list;
1342 struct completion done;
1343 enum writeback_sync_modes sync_mode;
1344 struct work_struct work;
1345 struct cifsFileInfo *cfile;
1346 struct cifs_aio_ctx *ctx;
1347 __u64 offset;
1348 pid_t pid;
1349 unsigned int bytes;
1350 int result;
1351#ifdef CONFIG_CIFS_SMB_DIRECT
1352 struct smbd_mr *mr;
1353#endif
1354 unsigned int pagesz;
1355 unsigned int page_offset;
1356 unsigned int tailsz;
1357 struct cifs_credits credits;
1358 unsigned int nr_pages;
1359 struct page **pages;
1360};
1361
1362/*
1363 * Take a reference on the file private data. Must be called with
1364 * cfile->file_info_lock held.
1365 */
1366static inline void
1367cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1368{
1369 ++cifs_file->count;
1370}
1371
1372struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1373void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr);
1374void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1375
1376#define CIFS_CACHE_READ_FLG 1
1377#define CIFS_CACHE_HANDLE_FLG 2
1378#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1379#define CIFS_CACHE_WRITE_FLG 4
1380#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1381#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1382
1383#define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
1384#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1385#define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
1386
1387/*
1388 * One of these for each file inode
1389 */
1390
1391struct cifsInodeInfo {
1392 bool can_cache_brlcks;
1393 struct list_head llist; /* locks helb by this inode */
1394 /*
1395 * NOTE: Some code paths call down_read(lock_sem) twice, so
1396 * we must always use use cifs_down_write() instead of down_write()
1397 * for this semaphore to avoid deadlocks.
1398 */
1399 struct rw_semaphore lock_sem; /* protect the fields above */
1400 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1401 struct list_head openFileList;
1402 spinlock_t open_file_lock; /* protects openFileList */
1403 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1404 unsigned int oplock; /* oplock/lease level we have */
1405 unsigned int epoch; /* used to track lease state changes */
1406#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1407#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1408#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1409#define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1410#define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1411#define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1412 unsigned long flags;
1413 spinlock_t writers_lock;
1414 unsigned int writers; /* Number of writers on this inode */
1415 unsigned long time; /* jiffies of last update of inode */
1416 u64 server_eof; /* current file size on server -- protected by i_lock */
1417 u64 uniqueid; /* server inode number */
1418 u64 createtime; /* creation time on server */
1419 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1420#ifdef CONFIG_CIFS_FSCACHE
1421 struct fscache_cookie *fscache;
1422#endif
1423 struct inode vfs_inode;
1424};
1425
1426static inline struct cifsInodeInfo *
1427CIFS_I(struct inode *inode)
1428{
1429 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1430}
1431
1432static inline struct cifs_sb_info *
1433CIFS_SB(struct super_block *sb)
1434{
1435 return sb->s_fs_info;
1436}
1437
1438static inline struct cifs_sb_info *
1439CIFS_FILE_SB(struct file *file)
1440{
1441 return CIFS_SB(file_inode(file)->i_sb);
1442}
1443
1444static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1445{
1446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1447 return '/';
1448 else
1449 return '\\';
1450}
1451
1452static inline void
1453convert_delimiter(char *path, char delim)
1454{
1455 char old_delim, *pos;
1456
1457 if (delim == '/')
1458 old_delim = '\\';
1459 else
1460 old_delim = '/';
1461
1462 pos = path;
1463 while ((pos = strchr(pos, old_delim)))
1464 *pos = delim;
1465}
1466
1467#define cifs_stats_inc atomic_inc
1468
1469static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1470 unsigned int bytes)
1471{
1472 if (bytes) {
1473 spin_lock(&tcon->stat_lock);
1474 tcon->bytes_written += bytes;
1475 spin_unlock(&tcon->stat_lock);
1476 }
1477}
1478
1479static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1480 unsigned int bytes)
1481{
1482 spin_lock(&tcon->stat_lock);
1483 tcon->bytes_read += bytes;
1484 spin_unlock(&tcon->stat_lock);
1485}
1486
1487
1488/*
1489 * This is the prototype for the mid receive function. This function is for
1490 * receiving the rest of the SMB frame, starting with the WordCount (which is
1491 * just after the MID in struct smb_hdr). Note:
1492 *
1493 * - This will be called by cifsd, with no locks held.
1494 * - The mid will still be on the pending_mid_q.
1495 * - mid->resp_buf will point to the current buffer.
1496 *
1497 * Returns zero on a successful receive, or an error. The receive state in
1498 * the TCP_Server_Info will also be updated.
1499 */
1500typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1501 struct mid_q_entry *mid);
1502
1503/*
1504 * This is the prototype for the mid callback function. This is called once the
1505 * mid has been received off of the socket. When creating one, take special
1506 * care to avoid deadlocks. Things to bear in mind:
1507 *
1508 * - it will be called by cifsd, with no locks held
1509 * - the mid will be removed from any lists
1510 */
1511typedef void (mid_callback_t)(struct mid_q_entry *mid);
1512
1513/*
1514 * This is the protopyte for mid handle function. This is called once the mid
1515 * has been recognized after decryption of the message.
1516 */
1517typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1518 struct mid_q_entry *mid);
1519
1520/* one of these for every pending CIFS request to the server */
1521struct mid_q_entry {
1522 struct list_head qhead; /* mids waiting on reply from this server */
1523 struct kref refcount;
1524 struct TCP_Server_Info *server; /* server corresponding to this mid */
1525 __u64 mid; /* multiplex id */
1526 __u16 credits; /* number of credits consumed by this mid */
1527 __u32 pid; /* process id */
1528 __u32 sequence_number; /* for CIFS signing */
1529 unsigned long when_alloc; /* when mid was created */
1530#ifdef CONFIG_CIFS_STATS2
1531 unsigned long when_sent; /* time when smb send finished */
1532 unsigned long when_received; /* when demux complete (taken off wire) */
1533#endif
1534 mid_receive_t *receive; /* call receive callback */
1535 mid_callback_t *callback; /* call completion callback */
1536 mid_handle_t *handle; /* call handle mid callback */
1537 void *callback_data; /* general purpose pointer for callback */
1538 void *resp_buf; /* pointer to received SMB header */
1539 unsigned int resp_buf_size;
1540 int mid_state; /* wish this were enum but can not pass to wait_event */
1541 unsigned int mid_flags;
1542 __le16 command; /* smb command code */
1543 unsigned int optype; /* operation type */
1544 bool large_buf:1; /* if valid response, is pointer to large buf */
1545 bool multiRsp:1; /* multiple trans2 responses for one request */
1546 bool multiEnd:1; /* both received */
1547 bool decrypted:1; /* decrypted entry */
1548};
1549
1550struct close_cancelled_open {
1551 struct cifs_fid fid;
1552 struct cifs_tcon *tcon;
1553 struct work_struct work;
1554};
1555
1556/* Make code in transport.c a little cleaner by moving
1557 update of optional stats into function below */
1558#ifdef CONFIG_CIFS_STATS2
1559
1560static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1561{
1562 atomic_inc(&server->in_send);
1563}
1564
1565static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1566{
1567 atomic_dec(&server->in_send);
1568}
1569
1570static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1571{
1572 atomic_inc(&server->num_waiters);
1573}
1574
1575static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1576{
1577 atomic_dec(&server->num_waiters);
1578}
1579
1580static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1581{
1582 mid->when_sent = jiffies;
1583}
1584#else
1585static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1586{
1587}
1588static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1589{
1590}
1591
1592static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1593{
1594}
1595
1596static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1597{
1598}
1599
1600static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1601{
1602}
1603#endif
1604
1605/* for pending dnotify requests */
1606struct dir_notify_req {
1607 struct list_head lhead;
1608 __le16 Pid;
1609 __le16 PidHigh;
1610 __u16 Mid;
1611 __u16 Tid;
1612 __u16 Uid;
1613 __u16 netfid;
1614 __u32 filter; /* CompletionFilter (for multishot) */
1615 int multishot;
1616 struct file *pfile;
1617};
1618
1619struct dfs_info3_param {
1620 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1621 int path_consumed;
1622 int server_type;
1623 int ref_flag;
1624 char *path_name;
1625 char *node_name;
1626 int ttl;
1627};
1628
1629/*
1630 * common struct for holding inode info when searching for or updating an
1631 * inode with new info
1632 */
1633
1634#define CIFS_FATTR_DFS_REFERRAL 0x1
1635#define CIFS_FATTR_DELETE_PENDING 0x2
1636#define CIFS_FATTR_NEED_REVAL 0x4
1637#define CIFS_FATTR_INO_COLLISION 0x8
1638#define CIFS_FATTR_UNKNOWN_NLINK 0x10
1639#define CIFS_FATTR_FAKE_ROOT_INO 0x20
1640
1641struct cifs_fattr {
1642 u32 cf_flags;
1643 u32 cf_cifsattrs;
1644 u64 cf_uniqueid;
1645 u64 cf_eof;
1646 u64 cf_bytes;
1647 u64 cf_createtime;
1648 kuid_t cf_uid;
1649 kgid_t cf_gid;
1650 umode_t cf_mode;
1651 dev_t cf_rdev;
1652 unsigned int cf_nlink;
1653 unsigned int cf_dtype;
1654 struct timespec64 cf_atime;
1655 struct timespec64 cf_mtime;
1656 struct timespec64 cf_ctime;
1657};
1658
1659static inline void free_dfs_info_param(struct dfs_info3_param *param)
1660{
1661 if (param) {
1662 kfree(param->path_name);
1663 kfree(param->node_name);
1664 }
1665}
1666
1667static inline void free_dfs_info_array(struct dfs_info3_param *param,
1668 int number_of_items)
1669{
1670 int i;
1671 if ((number_of_items == 0) || (param == NULL))
1672 return;
1673 for (i = 0; i < number_of_items; i++) {
1674 kfree(param[i].path_name);
1675 kfree(param[i].node_name);
1676 }
1677 kfree(param);
1678}
1679
1680static inline bool is_interrupt_error(int error)
1681{
1682 switch (error) {
1683 case -EINTR:
1684 case -ERESTARTSYS:
1685 case -ERESTARTNOHAND:
1686 case -ERESTARTNOINTR:
1687 return true;
1688 }
1689 return false;
1690}
1691
1692static inline bool is_retryable_error(int error)
1693{
1694 if (is_interrupt_error(error) || error == -EAGAIN)
1695 return true;
1696 return false;
1697}
1698
1699#define MID_FREE 0
1700#define MID_REQUEST_ALLOCATED 1
1701#define MID_REQUEST_SUBMITTED 2
1702#define MID_RESPONSE_RECEIVED 4
1703#define MID_RETRY_NEEDED 8 /* session closed while this request out */
1704#define MID_RESPONSE_MALFORMED 0x10
1705#define MID_SHUTDOWN 0x20
1706
1707/* Flags */
1708#define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1709#define MID_DELETED 2 /* Mid has been dequeued/deleted */
1710
1711/* Types of response buffer returned from SendReceive2 */
1712#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1713#define CIFS_SMALL_BUFFER 1
1714#define CIFS_LARGE_BUFFER 2
1715#define CIFS_IOVEC 4 /* array of response buffers */
1716
1717/* Type of Request to SendReceive2 */
1718#define CIFS_BLOCKING_OP 1 /* operation can block */
1719#define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1720#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1721#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1722#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1723#define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1724
1725/* Type of request operation */
1726#define CIFS_ECHO_OP 0x080 /* echo request */
1727#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1728#define CIFS_NEG_OP 0x0200 /* negotiate request */
1729#define CIFS_OP_MASK 0x0380 /* mask request type */
1730
1731#define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1732#define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1733#define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1734
1735/* Security Flags: indicate type of session setup needed */
1736#define CIFSSEC_MAY_SIGN 0x00001
1737#define CIFSSEC_MAY_NTLM 0x00002
1738#define CIFSSEC_MAY_NTLMV2 0x00004
1739#define CIFSSEC_MAY_KRB5 0x00008
1740#ifdef CONFIG_CIFS_WEAK_PW_HASH
1741#define CIFSSEC_MAY_LANMAN 0x00010
1742#define CIFSSEC_MAY_PLNTXT 0x00020
1743#else
1744#define CIFSSEC_MAY_LANMAN 0
1745#define CIFSSEC_MAY_PLNTXT 0
1746#endif /* weak passwords */
1747#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1748#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1749
1750#define CIFSSEC_MUST_SIGN 0x01001
1751/* note that only one of the following can be set so the
1752result of setting MUST flags more than once will be to
1753require use of the stronger protocol */
1754#define CIFSSEC_MUST_NTLM 0x02002
1755#define CIFSSEC_MUST_NTLMV2 0x04004
1756#define CIFSSEC_MUST_KRB5 0x08008
1757#ifdef CONFIG_CIFS_WEAK_PW_HASH
1758#define CIFSSEC_MUST_LANMAN 0x10010
1759#define CIFSSEC_MUST_PLNTXT 0x20020
1760#ifdef CONFIG_CIFS_UPCALL
1761#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1762#else
1763#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1764#endif /* UPCALL */
1765#else /* do not allow weak pw hash */
1766#define CIFSSEC_MUST_LANMAN 0
1767#define CIFSSEC_MUST_PLNTXT 0
1768#ifdef CONFIG_CIFS_UPCALL
1769#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1770#else
1771#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1772#endif /* UPCALL */
1773#endif /* WEAK_PW_HASH */
1774#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1775#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1776
1777#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1778#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1779#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1780/*
1781 *****************************************************************
1782 * All constants go here
1783 *****************************************************************
1784 */
1785
1786#define UID_HASH (16)
1787
1788/*
1789 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1790 * following to be declared.
1791 */
1792
1793/****************************************************************************
1794 * Locking notes. All updates to global variables and lists should be
1795 * protected by spinlocks or semaphores.
1796 *
1797 * Spinlocks
1798 * ---------
1799 * GlobalMid_Lock protects:
1800 * list operations on pending_mid_q and oplockQ
1801 * updates to XID counters, multiplex id and SMB sequence numbers
1802 * list operations on global DnotifyReqList
1803 * tcp_ses_lock protects:
1804 * list operations on tcp and SMB session lists
1805 * tcon->open_file_lock protects the list of open files hanging off the tcon
1806 * inode->open_file_lock protects the openFileList hanging off the inode
1807 * cfile->file_info_lock protects counters and fields in cifs file struct
1808 * f_owner.lock protects certain per file struct operations
1809 * mapping->page_lock protects certain per page operations
1810 *
1811 * Note that the cifs_tcon.open_file_lock should be taken before
1812 * not after the cifsInodeInfo.open_file_lock
1813 *
1814 * Semaphores
1815 * ----------
1816 * sesSem operations on smb session
1817 * tconSem operations on tree connection
1818 * fh_sem file handle reconnection operations
1819 *
1820 ****************************************************************************/
1821
1822#ifdef DECLARE_GLOBALS_HERE
1823#define GLOBAL_EXTERN
1824#else
1825#define GLOBAL_EXTERN extern
1826#endif
1827
1828/*
1829 * the list of TCP_Server_Info structures, ie each of the sockets
1830 * connecting our client to a distinct server (ip address), is
1831 * chained together by cifs_tcp_ses_list. The list of all our SMB
1832 * sessions (and from that the tree connections) can be found
1833 * by iterating over cifs_tcp_ses_list
1834 */
1835GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1836
1837/*
1838 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1839 * tcp session, and the list of tcon's per smb session. It also protects
1840 * the reference counters for the server, smb session, and tcon. Finally,
1841 * changes to the tcon->tidStatus should be done while holding this lock.
1842 * generally the locks should be taken in order tcp_ses_lock before
1843 * tcon->open_file_lock and that before file->file_info_lock since the
1844 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1845 */
1846GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1847
1848#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1849/* Outstanding dir notify requests */
1850GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1851/* DirNotify response queue */
1852GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1853#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1854
1855/*
1856 * Global transaction id (XID) information
1857 */
1858GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1859GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1860GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1861GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1862 /* on midQ entries */
1863/*
1864 * Global counters, updated atomically
1865 */
1866GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1867GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1868GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1869GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1870GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1871
1872/* Various Debug counters */
1873GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1874#ifdef CONFIG_CIFS_STATS2
1875GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1876GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1877extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1878#endif
1879GLOBAL_EXTERN atomic_t smBufAllocCount;
1880GLOBAL_EXTERN atomic_t midCount;
1881
1882/* Misc globals */
1883extern bool enable_oplocks; /* enable or disable oplocks */
1884extern bool lookupCacheEnabled;
1885extern unsigned int global_secflags; /* if on, session setup sent
1886 with more secure ntlmssp2 challenge/resp */
1887extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1888extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1889extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1890extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1891extern unsigned int cifs_min_small; /* min size of small buf pool */
1892extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1893extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1894
1895GLOBAL_EXTERN struct rb_root uidtree;
1896GLOBAL_EXTERN struct rb_root gidtree;
1897GLOBAL_EXTERN spinlock_t siduidlock;
1898GLOBAL_EXTERN spinlock_t sidgidlock;
1899GLOBAL_EXTERN struct rb_root siduidtree;
1900GLOBAL_EXTERN struct rb_root sidgidtree;
1901GLOBAL_EXTERN spinlock_t uidsidlock;
1902GLOBAL_EXTERN spinlock_t gidsidlock;
1903
1904void cifs_oplock_break(struct work_struct *work);
1905void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1906
1907extern const struct slow_work_ops cifs_oplock_break_ops;
1908extern struct workqueue_struct *cifsiod_wq;
1909extern struct workqueue_struct *decrypt_wq;
1910extern struct workqueue_struct *cifsoplockd_wq;
1911extern __u32 cifs_lock_secret;
1912
1913extern mempool_t *cifs_mid_poolp;
1914
1915/* Operations for different SMB versions */
1916#define SMB1_VERSION_STRING "1.0"
1917extern struct smb_version_operations smb1_operations;
1918extern struct smb_version_values smb1_values;
1919#define SMB20_VERSION_STRING "2.0"
1920extern struct smb_version_operations smb20_operations;
1921extern struct smb_version_values smb20_values;
1922#define SMB21_VERSION_STRING "2.1"
1923extern struct smb_version_operations smb21_operations;
1924extern struct smb_version_values smb21_values;
1925#define SMBDEFAULT_VERSION_STRING "default"
1926extern struct smb_version_values smbdefault_values;
1927#define SMB3ANY_VERSION_STRING "3"
1928extern struct smb_version_values smb3any_values;
1929#define SMB30_VERSION_STRING "3.0"
1930extern struct smb_version_operations smb30_operations;
1931extern struct smb_version_values smb30_values;
1932#define SMB302_VERSION_STRING "3.02"
1933#define ALT_SMB302_VERSION_STRING "3.0.2"
1934/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1935extern struct smb_version_values smb302_values;
1936#define SMB311_VERSION_STRING "3.1.1"
1937#define ALT_SMB311_VERSION_STRING "3.11"
1938extern struct smb_version_operations smb311_operations;
1939extern struct smb_version_values smb311_values;
1940#endif /* _CIFS_GLOB_H */