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/* 29 * The sizes of various internal tables and strings 30 */ 31#define MAX_UID_INFO 16 32#define MAX_SES_INFO 2 33#define MAX_TCON_INFO 4 34 35#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1) 36#define MAX_SERVER_SIZE 15 37#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */ 38#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null 39 termination then *2 for unicode versions */ 40#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */ 41 42#define CIFS_MIN_RCV_POOL 4 43 44/* 45 * MAX_REQ is the maximum number of requests that WE will send 46 * on one socket concurrently. It also matches the most common 47 * value of max multiplex returned by servers. We may 48 * eventually want to use the negotiated value (in case 49 * future servers can handle more) when we are more confident that 50 * we will not have problems oveloading the socket with pending 51 * write data. 52 */ 53#define CIFS_MAX_REQ 50 54 55#define RFC1001_NAME_LEN 15 56#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 57 58/* currently length of NIP6_FMT */ 59#define SERVER_NAME_LENGTH 40 60#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 61 62/* used to define string lengths for reversing unicode strings */ 63/* (256+1)*2 = 514 */ 64/* (max path length + 1 for null) * 2 for unicode */ 65#define MAX_NAME 514 66 67#include "cifspdu.h" 68 69#ifndef XATTR_DOS_ATTRIB 70#define XATTR_DOS_ATTRIB "user.DOSATTRIB" 71#endif 72 73/* 74 * CIFS vfs client Status information (based on what we know.) 75 */ 76 77 /* associated with each tcp and smb session */ 78enum statusEnum { 79 CifsNew = 0, 80 CifsGood, 81 CifsExiting, 82 CifsNeedReconnect 83}; 84 85enum securityEnum { 86 LANMAN = 0, /* Legacy LANMAN auth */ 87 NTLM, /* Legacy NTLM012 auth with NTLM hash */ 88 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 89 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 90/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */ 91 Kerberos, /* Kerberos via SPNEGO */ 92}; 93 94enum protocolEnum { 95 TCP = 0, 96 SCTP 97 /* Netbios frames protocol not supported at this time */ 98}; 99 100struct mac_key { 101 unsigned int len; 102 union { 103 char ntlm[CIFS_SESS_KEY_SIZE + 16]; 104 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */ 105 struct { 106 char key[16]; 107 struct ntlmv2_resp resp; 108 } ntlmv2; 109 } data; 110}; 111 112struct cifs_cred { 113 int uid; 114 int gid; 115 int mode; 116 int cecount; 117 struct cifs_sid osid; 118 struct cifs_sid gsid; 119 struct cifs_ntace *ntaces; 120 struct cifs_ace *aces; 121}; 122 123/* 124 ***************************************************************** 125 * Except the CIFS PDUs themselves all the 126 * globally interesting structs should go here 127 ***************************************************************** 128 */ 129 130struct TCP_Server_Info { 131 struct list_head tcp_ses_list; 132 struct list_head smb_ses_list; 133 int srv_count; /* reference counter */ 134 /* 15 character server name + 0x20 16th byte indicating type = srv */ 135 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 136 char *hostname; /* hostname portion of UNC string */ 137 struct socket *ssocket; 138 union { 139 struct sockaddr_in sockAddr; 140 struct sockaddr_in6 sockAddr6; 141 } addr; 142 wait_queue_head_t response_q; 143 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 144 struct list_head pending_mid_q; 145 void *Server_NlsInfo; /* BB - placeholder for future NLS info */ 146 unsigned short server_codepage; /* codepage for the server */ 147 enum protocolEnum protocolType; 148 char versionMajor; 149 char versionMinor; 150 bool svlocal:1; /* local server or remote */ 151 bool noblocksnd; /* use blocking sendmsg */ 152 bool noautotune; /* do not autotune send buf sizes */ 153 bool tcp_nodelay; 154 atomic_t inFlight; /* number of requests on the wire to server */ 155#ifdef CONFIG_CIFS_STATS2 156 atomic_t inSend; /* requests trying to send */ 157 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 158#endif 159 enum statusEnum tcpStatus; /* what we think the status is */ 160 struct mutex srv_mutex; 161 struct task_struct *tsk; 162 char server_GUID[16]; 163 char secMode; 164 enum securityEnum secType; 165 unsigned int maxReq; /* Clients should submit no more */ 166 /* than maxReq distinct unanswered SMBs to the server when using */ 167 /* multiplexed reads or writes */ 168 unsigned int maxBuf; /* maxBuf specifies the maximum */ 169 /* message size the server can send or receive for non-raw SMBs */ 170 unsigned int max_rw; /* maxRw specifies the maximum */ 171 /* message size the server can send or receive for */ 172 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 173 unsigned int max_vcs; /* maximum number of smb sessions, at least 174 those that can be specified uniquely with 175 vcnumbers */ 176 char sessid[4]; /* unique token id for this session */ 177 /* (returned on Negotiate */ 178 int capabilities; /* allow selective disabling of caps by smb sess */ 179 int timeAdj; /* Adjust for difference in server time zone in sec */ 180 __u16 CurrentMid; /* multiplex id - rotating counter */ 181 char cryptKey[CIFS_CRYPTO_KEY_SIZE]; 182 /* 16th byte of RFC1001 workstation name is always null */ 183 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 184 __u32 sequence_number; /* needed for CIFS PDU signature */ 185 struct mac_key mac_signing_key; 186 char ntlmv2_hash[16]; 187 unsigned long lstrp; /* when we got last response from this server */ 188 u16 dialect; /* dialect index that server chose */ 189 /* extended security flavors that server supports */ 190 bool sec_kerberos; /* supports plain Kerberos */ 191 bool sec_mskerberos; /* supports legacy MS Kerberos */ 192 bool sec_kerberosu2u; /* supports U2U Kerberos */ 193 bool sec_ntlmssp; /* supports NTLMSSP */ 194#ifdef CONFIG_CIFS_FSCACHE 195 struct fscache_cookie *fscache; /* client index cache cookie */ 196#endif 197}; 198 199/* 200 * Session structure. One of these for each uid session with a particular host 201 */ 202struct cifsSesInfo { 203 struct list_head smb_ses_list; 204 struct list_head tcon_list; 205 struct mutex session_mutex; 206 struct TCP_Server_Info *server; /* pointer to server info */ 207 int ses_count; /* reference counter */ 208 enum statusEnum status; 209 unsigned overrideSecFlg; /* if non-zero override global sec flags */ 210 __u16 ipc_tid; /* special tid for connection to IPC share */ 211 __u16 flags; 212 __u16 vcnum; 213 char *serverOS; /* name of operating system underlying server */ 214 char *serverNOS; /* name of network operating system of server */ 215 char *serverDomain; /* security realm of server */ 216 int Suid; /* remote smb uid */ 217 uid_t linux_uid; /* overriding owner of files on the mount */ 218 uid_t cred_uid; /* owner of credentials */ 219 int capabilities; 220 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for 221 TCP names - will ipv6 and sctp addresses fit? */ 222 char userName[MAX_USERNAME_SIZE + 1]; 223 char *domainName; 224 char *password; 225 bool need_reconnect:1; /* connection reset, uid now invalid */ 226}; 227/* no more than one of the following three session flags may be set */ 228#define CIFS_SES_NT4 1 229#define CIFS_SES_OS2 2 230#define CIFS_SES_W9X 4 231/* following flag is set for old servers such as OS2 (and Win95?) 232 which do not negotiate NTLM or POSIX dialects, but instead 233 negotiate one of the older LANMAN dialects */ 234#define CIFS_SES_LANMAN 8 235/* 236 * there is one of these for each connection to a resource on a particular 237 * session 238 */ 239struct cifsTconInfo { 240 struct list_head tcon_list; 241 int tc_count; 242 struct list_head openFileList; 243 struct cifsSesInfo *ses; /* pointer to session associated with */ 244 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 245 char *nativeFileSystem; 246 char *password; /* for share-level security */ 247 __u16 tid; /* The 2 byte tree id */ 248 __u16 Flags; /* optional support bits */ 249 enum statusEnum tidStatus; 250#ifdef CONFIG_CIFS_STATS 251 atomic_t num_smbs_sent; 252 atomic_t num_writes; 253 atomic_t num_reads; 254 atomic_t num_flushes; 255 atomic_t num_oplock_brks; 256 atomic_t num_opens; 257 atomic_t num_closes; 258 atomic_t num_deletes; 259 atomic_t num_mkdirs; 260 atomic_t num_posixopens; 261 atomic_t num_posixmkdirs; 262 atomic_t num_rmdirs; 263 atomic_t num_renames; 264 atomic_t num_t2renames; 265 atomic_t num_ffirst; 266 atomic_t num_fnext; 267 atomic_t num_fclose; 268 atomic_t num_hardlinks; 269 atomic_t num_symlinks; 270 atomic_t num_locks; 271 atomic_t num_acl_get; 272 atomic_t num_acl_set; 273#ifdef CONFIG_CIFS_STATS2 274 unsigned long long time_writes; 275 unsigned long long time_reads; 276 unsigned long long time_opens; 277 unsigned long long time_deletes; 278 unsigned long long time_closes; 279 unsigned long long time_mkdirs; 280 unsigned long long time_rmdirs; 281 unsigned long long time_renames; 282 unsigned long long time_t2renames; 283 unsigned long long time_ffirst; 284 unsigned long long time_fnext; 285 unsigned long long time_fclose; 286#endif /* CONFIG_CIFS_STATS2 */ 287 __u64 bytes_read; 288 __u64 bytes_written; 289 spinlock_t stat_lock; 290#endif /* CONFIG_CIFS_STATS */ 291 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 292 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 293 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 294 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */ 295 bool retry:1; 296 bool nocase:1; 297 bool seal:1; /* transport encryption for this mounted share */ 298 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 299 for this mount even if server would support */ 300 bool local_lease:1; /* check leases (only) on local system not remote */ 301 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 302 bool need_reconnect:1; /* connection reset, tid now invalid */ 303#ifdef CONFIG_CIFS_FSCACHE 304 u64 resource_id; /* server resource id */ 305 struct fscache_cookie *fscache; /* cookie for share */ 306#endif 307 /* BB add field for back pointer to sb struct(s)? */ 308}; 309 310/* 311 * This info hangs off the cifsFileInfo structure, pointed to by llist. 312 * This is used to track byte stream locks on the file 313 */ 314struct cifsLockInfo { 315 struct list_head llist; /* pointer to next cifsLockInfo */ 316 __u64 offset; 317 __u64 length; 318 __u8 type; 319}; 320 321/* 322 * One of these for each open instance of a file 323 */ 324struct cifs_search_info { 325 loff_t index_of_last_entry; 326 __u16 entries_in_buffer; 327 __u16 info_level; 328 __u32 resume_key; 329 char *ntwrk_buf_start; 330 char *srch_entries_start; 331 char *last_entry; 332 char *presume_name; 333 unsigned int resume_name_len; 334 bool endOfSearch:1; 335 bool emptyDir:1; 336 bool unicode:1; 337 bool smallBuf:1; /* so we know which buf_release function to call */ 338}; 339 340struct cifsFileInfo { 341 struct list_head tlist; /* pointer to next fid owned by tcon */ 342 struct list_head flist; /* next fid (file instance) for this inode */ 343 unsigned int uid; /* allows finding which FileInfo structure */ 344 __u32 pid; /* process id who opened file */ 345 __u16 netfid; /* file id from remote */ 346 /* BB add lock scope info here if needed */ ; 347 /* lock scope id (0 if none) */ 348 struct file *pfile; /* needed for writepage */ 349 struct inode *pInode; /* needed for oplock break */ 350 struct vfsmount *mnt; 351 struct mutex lock_mutex; 352 struct list_head llist; /* list of byte range locks we have. */ 353 bool closePend:1; /* file is marked to close */ 354 bool invalidHandle:1; /* file closed via session abend */ 355 bool oplock_break_cancelled:1; 356 atomic_t count; /* reference count */ 357 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 358 struct cifs_search_info srch_inf; 359 struct work_struct oplock_break; /* work for oplock breaks */ 360}; 361 362/* Take a reference on the file private data */ 363static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file) 364{ 365 atomic_inc(&cifs_file->count); 366} 367 368/* Release a reference on the file private data */ 369static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file) 370{ 371 if (atomic_dec_and_test(&cifs_file->count)) { 372 iput(cifs_file->pInode); 373 kfree(cifs_file); 374 } 375} 376 377/* 378 * One of these for each file inode 379 */ 380 381struct cifsInodeInfo { 382 struct list_head lockList; 383 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 384 struct list_head openFileList; 385 int write_behind_rc; 386 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 387 unsigned long time; /* jiffies of last update/check of inode */ 388 bool clientCanCacheRead:1; /* read oplock */ 389 bool clientCanCacheAll:1; /* read and writebehind oplock */ 390 bool delete_pending:1; /* DELETE_ON_CLOSE is set */ 391 bool invalid_mapping:1; /* pagecache is invalid */ 392 u64 server_eof; /* current file size on server */ 393 u64 uniqueid; /* server inode number */ 394#ifdef CONFIG_CIFS_FSCACHE 395 struct fscache_cookie *fscache; 396#endif 397 struct inode vfs_inode; 398}; 399 400static inline struct cifsInodeInfo * 401CIFS_I(struct inode *inode) 402{ 403 return container_of(inode, struct cifsInodeInfo, vfs_inode); 404} 405 406static inline struct cifs_sb_info * 407CIFS_SB(struct super_block *sb) 408{ 409 return sb->s_fs_info; 410} 411 412static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 413{ 414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 415 return '/'; 416 else 417 return '\\'; 418} 419 420#ifdef CONFIG_CIFS_STATS 421#define cifs_stats_inc atomic_inc 422 423static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon, 424 unsigned int bytes) 425{ 426 if (bytes) { 427 spin_lock(&tcon->stat_lock); 428 tcon->bytes_written += bytes; 429 spin_unlock(&tcon->stat_lock); 430 } 431} 432 433static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon, 434 unsigned int bytes) 435{ 436 spin_lock(&tcon->stat_lock); 437 tcon->bytes_read += bytes; 438 spin_unlock(&tcon->stat_lock); 439} 440#else 441 442#define cifs_stats_inc(field) do {} while (0) 443#define cifs_stats_bytes_written(tcon, bytes) do {} while (0) 444#define cifs_stats_bytes_read(tcon, bytes) do {} while (0) 445 446#endif 447 448/* one of these for every pending CIFS request to the server */ 449struct mid_q_entry { 450 struct list_head qhead; /* mids waiting on reply from this server */ 451 __u16 mid; /* multiplex id */ 452 __u16 pid; /* process id */ 453 __u32 sequence_number; /* for CIFS signing */ 454 unsigned long when_alloc; /* when mid was created */ 455#ifdef CONFIG_CIFS_STATS2 456 unsigned long when_sent; /* time when smb send finished */ 457 unsigned long when_received; /* when demux complete (taken off wire) */ 458#endif 459 struct task_struct *tsk; /* task waiting for response */ 460 struct smb_hdr *resp_buf; /* response buffer */ 461 int midState; /* wish this were enum but can not pass to wait_event */ 462 __u8 command; /* smb command code */ 463 bool largeBuf:1; /* if valid response, is pointer to large buf */ 464 bool multiRsp:1; /* multiple trans2 responses for one request */ 465 bool multiEnd:1; /* both received */ 466}; 467 468struct oplock_q_entry { 469 struct list_head qhead; 470 struct inode *pinode; 471 struct cifsTconInfo *tcon; 472 __u16 netfid; 473}; 474 475/* for pending dnotify requests */ 476struct dir_notify_req { 477 struct list_head lhead; 478 __le16 Pid; 479 __le16 PidHigh; 480 __u16 Mid; 481 __u16 Tid; 482 __u16 Uid; 483 __u16 netfid; 484 __u32 filter; /* CompletionFilter (for multishot) */ 485 int multishot; 486 struct file *pfile; 487}; 488 489struct dfs_info3_param { 490 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 491 int path_consumed; 492 int server_type; 493 int ref_flag; 494 char *path_name; 495 char *node_name; 496}; 497 498/* 499 * common struct for holding inode info when searching for or updating an 500 * inode with new info 501 */ 502 503#define CIFS_FATTR_DFS_REFERRAL 0x1 504#define CIFS_FATTR_DELETE_PENDING 0x2 505#define CIFS_FATTR_NEED_REVAL 0x4 506#define CIFS_FATTR_INO_COLLISION 0x8 507 508struct cifs_fattr { 509 u32 cf_flags; 510 u32 cf_cifsattrs; 511 u64 cf_uniqueid; 512 u64 cf_eof; 513 u64 cf_bytes; 514 uid_t cf_uid; 515 gid_t cf_gid; 516 umode_t cf_mode; 517 dev_t cf_rdev; 518 unsigned int cf_nlink; 519 unsigned int cf_dtype; 520 struct timespec cf_atime; 521 struct timespec cf_mtime; 522 struct timespec cf_ctime; 523}; 524 525static inline void free_dfs_info_param(struct dfs_info3_param *param) 526{ 527 if (param) { 528 kfree(param->path_name); 529 kfree(param->node_name); 530 kfree(param); 531 } 532} 533 534static inline void free_dfs_info_array(struct dfs_info3_param *param, 535 int number_of_items) 536{ 537 int i; 538 if ((number_of_items == 0) || (param == NULL)) 539 return; 540 for (i = 0; i < number_of_items; i++) { 541 kfree(param[i].path_name); 542 kfree(param[i].node_name); 543 } 544 kfree(param); 545} 546 547#define MID_FREE 0 548#define MID_REQUEST_ALLOCATED 1 549#define MID_REQUEST_SUBMITTED 2 550#define MID_RESPONSE_RECEIVED 4 551#define MID_RETRY_NEEDED 8 /* session closed while this request out */ 552#define MID_NO_RESP_NEEDED 0x10 553 554/* Types of response buffer returned from SendReceive2 */ 555#define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 556#define CIFS_SMALL_BUFFER 1 557#define CIFS_LARGE_BUFFER 2 558#define CIFS_IOVEC 4 /* array of response buffers */ 559 560/* Type of Request to SendReceive2 */ 561#define CIFS_STD_OP 0 /* normal request timeout */ 562#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */ 563#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */ 564#define CIFS_BLOCKING_OP 4 /* operation can block */ 565#define CIFS_ASYNC_OP 8 /* do not wait for response */ 566#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */ 567#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 568#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 569#define CIFS_NO_RESP 0x040 /* no response buffer required */ 570 571/* Security Flags: indicate type of session setup needed */ 572#define CIFSSEC_MAY_SIGN 0x00001 573#define CIFSSEC_MAY_NTLM 0x00002 574#define CIFSSEC_MAY_NTLMV2 0x00004 575#define CIFSSEC_MAY_KRB5 0x00008 576#ifdef CONFIG_CIFS_WEAK_PW_HASH 577#define CIFSSEC_MAY_LANMAN 0x00010 578#define CIFSSEC_MAY_PLNTXT 0x00020 579#else 580#define CIFSSEC_MAY_LANMAN 0 581#define CIFSSEC_MAY_PLNTXT 0 582#endif /* weak passwords */ 583#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 584#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 585 586#define CIFSSEC_MUST_SIGN 0x01001 587/* note that only one of the following can be set so the 588result of setting MUST flags more than once will be to 589require use of the stronger protocol */ 590#define CIFSSEC_MUST_NTLM 0x02002 591#define CIFSSEC_MUST_NTLMV2 0x04004 592#define CIFSSEC_MUST_KRB5 0x08008 593#ifdef CONFIG_CIFS_WEAK_PW_HASH 594#define CIFSSEC_MUST_LANMAN 0x10010 595#define CIFSSEC_MUST_PLNTXT 0x20020 596#ifdef CONFIG_CIFS_UPCALL 597#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */ 598#else 599#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */ 600#endif /* UPCALL */ 601#else /* do not allow weak pw hash */ 602#ifdef CONFIG_CIFS_UPCALL 603#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 604#else 605#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 606#endif /* UPCALL */ 607#endif /* WEAK_PW_HASH */ 608#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 609#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 610 611#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2) 612#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2) 613#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 614/* 615 ***************************************************************** 616 * All constants go here 617 ***************************************************************** 618 */ 619 620#define UID_HASH (16) 621 622/* 623 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 624 * following to be declared. 625 */ 626 627/**************************************************************************** 628 * Locking notes. All updates to global variables and lists should be 629 * protected by spinlocks or semaphores. 630 * 631 * Spinlocks 632 * --------- 633 * GlobalMid_Lock protects: 634 * list operations on pending_mid_q and oplockQ 635 * updates to XID counters, multiplex id and SMB sequence numbers 636 * GlobalSMBSesLock protects: 637 * list operations on tcp and SMB session lists and tCon lists 638 * f_owner.lock protects certain per file struct operations 639 * mapping->page_lock protects certain per page operations 640 * 641 * Semaphores 642 * ---------- 643 * sesSem operations on smb session 644 * tconSem operations on tree connection 645 * fh_sem file handle reconnection operations 646 * 647 ****************************************************************************/ 648 649#ifdef DECLARE_GLOBALS_HERE 650#define GLOBAL_EXTERN 651#else 652#define GLOBAL_EXTERN extern 653#endif 654 655/* 656 * the list of TCP_Server_Info structures, ie each of the sockets 657 * connecting our client to a distinct server (ip address), is 658 * chained together by cifs_tcp_ses_list. The list of all our SMB 659 * sessions (and from that the tree connections) can be found 660 * by iterating over cifs_tcp_ses_list 661 */ 662GLOBAL_EXTERN struct list_head cifs_tcp_ses_list; 663 664/* 665 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 666 * tcp session, and the list of tcon's per smb session. It also protects 667 * the reference counters for the server, smb session, and tcon. Finally, 668 * changes to the tcon->tidStatus should be done while holding this lock. 669 */ 670GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock; 671 672/* 673 * This lock protects the cifs_file->llist and cifs_file->flist 674 * list operations, and updates to some flags (cifs_file->invalidHandle) 675 * It will be moved to either use the tcon->stat_lock or equivalent later. 676 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then 677 * the cifs_tcp_ses_lock must be grabbed first and released last. 678 */ 679GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; 680 681/* Outstanding dir notify requests */ 682GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; 683/* DirNotify response queue */ 684GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; 685 686/* 687 * Global transaction id (XID) information 688 */ 689GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 690GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 691GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 692GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */ 693 /* on midQ entries */ 694GLOBAL_EXTERN char Local_System_Name[15]; 695 696/* 697 * Global counters, updated atomically 698 */ 699GLOBAL_EXTERN atomic_t sesInfoAllocCount; 700GLOBAL_EXTERN atomic_t tconInfoAllocCount; 701GLOBAL_EXTERN atomic_t tcpSesAllocCount; 702GLOBAL_EXTERN atomic_t tcpSesReconnectCount; 703GLOBAL_EXTERN atomic_t tconInfoReconnectCount; 704 705/* Various Debug counters */ 706GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */ 707#ifdef CONFIG_CIFS_STATS2 708GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */ 709GLOBAL_EXTERN atomic_t totSmBufAllocCount; 710#endif 711GLOBAL_EXTERN atomic_t smBufAllocCount; 712GLOBAL_EXTERN atomic_t midCount; 713 714/* Misc globals */ 715GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions 716 to be established on existing mount if we 717 have the uid/password or Kerberos credential 718 or equivalent for current user */ 719GLOBAL_EXTERN unsigned int oplockEnabled; 720GLOBAL_EXTERN unsigned int experimEnabled; 721GLOBAL_EXTERN unsigned int lookupCacheEnabled; 722GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent 723 with more secure ntlmssp2 challenge/resp */ 724GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 725GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 726GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ 727GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 728GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ 729GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/ 730 731void cifs_oplock_break(struct work_struct *work); 732void cifs_oplock_break_get(struct cifsFileInfo *cfile); 733void cifs_oplock_break_put(struct cifsFileInfo *cfile); 734 735extern const struct slow_work_ops cifs_oplock_break_ops; 736 737#endif /* _CIFS_GLOB_H */ 738