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/scatterlist.h> 26 #include <linux/mm.h> 27 #include <linux/mempool.h> 28 #include <linux/workqueue.h> 29 #include "cifs_fs_sb.h" 30 #include "cifsacl.h" 31 #include <crypto/internal/hash.h> 32 #include <linux/scatterlist.h> 33 #include <uapi/linux/cifs/cifs_mount.h> 34 #include "smb2pdu.h" 35 #include "smb2glob.h" 36 37 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ 38 39 #define SMB_PATH_MAX 260 40 #define CIFS_PORT 445 41 #define RFC1001_PORT 139 42 43 /* 44 * The sizes of various internal tables and strings 45 */ 46 #define MAX_UID_INFO 16 47 #define MAX_SES_INFO 2 48 #define MAX_TCON_INFO 4 49 50 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) 51 52 #define CIFS_MIN_RCV_POOL 4 53 54 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ 55 /* 56 * default attribute cache timeout (jiffies) 57 */ 58 #define CIFS_DEF_ACTIMEO (1 * HZ) 59 60 /* 61 * max attribute cache timeout (jiffies) - 2^30 62 */ 63 #define CIFS_MAX_ACTIMEO (1 << 30) 64 65 /* 66 * Max persistent and resilient handle timeout (milliseconds). 67 * Windows durable max was 960000 (16 minutes) 68 */ 69 #define SMB3_MAX_HANDLE_TIMEOUT 960000 70 71 /* 72 * MAX_REQ is the maximum number of requests that WE will send 73 * on one socket concurrently. 74 */ 75 #define CIFS_MAX_REQ 32767 76 77 #define RFC1001_NAME_LEN 15 78 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 79 80 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 81 #define SERVER_NAME_LENGTH 80 82 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 83 84 /* echo interval in seconds */ 85 #define SMB_ECHO_INTERVAL_MIN 1 86 #define SMB_ECHO_INTERVAL_MAX 600 87 #define SMB_ECHO_INTERVAL_DEFAULT 60 88 89 /* maximum number of PDUs in one compound */ 90 #define MAX_COMPOUND 5 91 92 /* 93 * Default number of credits to keep available for SMB3. 94 * This value is chosen somewhat arbitrarily. The Windows client 95 * defaults to 128 credits, the Windows server allows clients up to 96 * 512 credits (or 8K for later versions), and the NetApp server 97 * does not limit clients at all. Choose a high enough default value 98 * such that the client shouldn't limit performance, but allow mount 99 * to override (until you approach 64K, where we limit credits to 65000 100 * to reduce possibility of seeing more server credit overflow bugs. 101 */ 102 #define SMB2_MAX_CREDITS_AVAILABLE 32000 103 104 #include "cifspdu.h" 105 106 #ifndef XATTR_DOS_ATTRIB 107 #define XATTR_DOS_ATTRIB "user.DOSATTRIB" 108 #endif 109 110 /* 111 * CIFS vfs client Status information (based on what we know.) 112 */ 113 114 /* associated with each tcp and smb session */ 115 enum statusEnum { 116 CifsNew = 0, 117 CifsGood, 118 CifsExiting, 119 CifsNeedReconnect, 120 CifsNeedNegotiate 121 }; 122 123 enum securityEnum { 124 Unspecified = 0, /* not specified */ 125 LANMAN, /* Legacy LANMAN auth */ 126 NTLM, /* Legacy NTLM012 auth with NTLM hash */ 127 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 128 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 129 Kerberos, /* Kerberos via SPNEGO */ 130 }; 131 132 struct session_key { 133 unsigned int len; 134 char *response; 135 }; 136 137 /* crypto security descriptor definition */ 138 struct sdesc { 139 struct shash_desc shash; 140 char ctx[]; 141 }; 142 143 /* crypto hashing related structure/fields, not specific to a sec mech */ 144 struct cifs_secmech { 145 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */ 146 struct crypto_shash *md5; /* md5 hash function */ 147 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */ 148 struct crypto_shash *cmacaes; /* block-cipher based MAC function */ 149 struct crypto_shash *sha512; /* sha512 hash function */ 150 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */ 151 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */ 152 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */ 153 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */ 154 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */ 155 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */ 156 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */ 157 }; 158 159 /* per smb session structure/fields */ 160 struct ntlmssp_auth { 161 bool sesskey_per_smbsess; /* whether session key is per smb session */ 162 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 163 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 164 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 165 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 166 }; 167 168 struct cifs_cred { 169 int uid; 170 int gid; 171 int mode; 172 int cecount; 173 struct cifs_sid osid; 174 struct cifs_sid gsid; 175 struct cifs_ntace *ntaces; 176 struct cifs_ace *aces; 177 }; 178 179 /* 180 ***************************************************************** 181 * Except the CIFS PDUs themselves all the 182 * globally interesting structs should go here 183 ***************************************************************** 184 */ 185 186 /* 187 * A smb_rqst represents a complete request to be issued to a server. It's 188 * formed by a kvec array, followed by an array of pages. Page data is assumed 189 * to start at the beginning of the first page. 190 */ 191 struct smb_rqst { 192 struct kvec *rq_iov; /* array of kvecs */ 193 unsigned int rq_nvec; /* number of kvecs in array */ 194 struct page **rq_pages; /* pointer to array of page ptrs */ 195 unsigned int rq_offset; /* the offset to the 1st page */ 196 unsigned int rq_npages; /* number pages in array */ 197 unsigned int rq_pagesz; /* page size to use */ 198 unsigned int rq_tailsz; /* length of last page */ 199 }; 200 201 enum smb_version { 202 Smb_1 = 1, 203 Smb_20, 204 Smb_21, 205 Smb_30, 206 Smb_302, 207 Smb_311, 208 Smb_3any, 209 Smb_default, 210 Smb_version_err 211 }; 212 213 struct mid_q_entry; 214 struct TCP_Server_Info; 215 struct cifsFileInfo; 216 struct cifs_ses; 217 struct cifs_tcon; 218 struct dfs_info3_param; 219 struct cifs_fattr; 220 struct smb_vol; 221 struct cifs_fid; 222 struct cifs_readdata; 223 struct cifs_writedata; 224 struct cifs_io_parms; 225 struct cifs_search_info; 226 struct cifsInodeInfo; 227 struct cifs_open_parms; 228 struct cifs_credits; 229 230 struct smb_version_operations { 231 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 232 struct mid_q_entry *); 233 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 234 /* setup request: allocate mid, sign message */ 235 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 236 struct smb_rqst *); 237 /* setup async request: allocate mid, sign message */ 238 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 239 struct smb_rqst *); 240 /* check response: verify signature, map error */ 241 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 242 bool); 243 void (*add_credits)(struct TCP_Server_Info *server, 244 const struct cifs_credits *credits, 245 const int optype); 246 void (*set_credits)(struct TCP_Server_Info *, const int); 247 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 248 unsigned int (*get_credits)(struct mid_q_entry *); 249 __u64 (*get_next_mid)(struct TCP_Server_Info *); 250 void (*revert_current_mid)(struct TCP_Server_Info *server, 251 const unsigned int val); 252 /* data offset from read response message */ 253 unsigned int (*read_data_offset)(char *); 254 /* 255 * Data length from read response message 256 * When in_remaining is true, the returned data length is in 257 * message field DataRemaining for out-of-band data read (e.g through 258 * Memory Registration RDMA write in SMBD). 259 * Otherwise, the returned data length is in message field DataLength. 260 */ 261 unsigned int (*read_data_length)(char *, bool in_remaining); 262 /* map smb to linux error */ 263 int (*map_error)(char *, bool); 264 /* find mid corresponding to the response message */ 265 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 266 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 267 void (*clear_stats)(struct cifs_tcon *); 268 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 269 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 270 /* verify the message */ 271 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 272 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 273 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *); 274 void (*downgrade_oplock)(struct TCP_Server_Info *server, 275 struct cifsInodeInfo *cinode, __u32 oplock, 276 unsigned int epoch, bool *purge_cache); 277 /* process transaction2 response */ 278 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 279 char *, int); 280 /* check if we need to negotiate */ 281 bool (*need_neg)(struct TCP_Server_Info *); 282 /* negotiate to the server */ 283 int (*negotiate)(const unsigned int, struct cifs_ses *); 284 /* set negotiated write size */ 285 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *); 286 /* set negotiated read size */ 287 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *); 288 /* setup smb sessionn */ 289 int (*sess_setup)(const unsigned int, struct cifs_ses *, 290 const struct nls_table *); 291 /* close smb session */ 292 int (*logoff)(const unsigned int, struct cifs_ses *); 293 /* connect to a server share */ 294 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 295 struct cifs_tcon *, const struct nls_table *); 296 /* close tree connecion */ 297 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 298 /* get DFS referrals */ 299 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 300 const char *, struct dfs_info3_param **, 301 unsigned int *, const struct nls_table *, int); 302 /* informational QFS call */ 303 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 304 struct cifs_sb_info *); 305 /* check if a path is accessible or not */ 306 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 307 struct cifs_sb_info *, const char *); 308 /* query path data from the server */ 309 int (*query_path_info)(const unsigned int, struct cifs_tcon *, 310 struct cifs_sb_info *, const char *, 311 FILE_ALL_INFO *, bool *, bool *); 312 /* query file data from the server */ 313 int (*query_file_info)(const unsigned int, struct cifs_tcon *, 314 struct cifs_fid *, FILE_ALL_INFO *); 315 /* get server index number */ 316 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *, 317 struct cifs_sb_info *, const char *, 318 u64 *uniqueid, FILE_ALL_INFO *); 319 /* set size by path */ 320 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 321 const char *, __u64, struct cifs_sb_info *, bool); 322 /* set size by file handle */ 323 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 324 struct cifsFileInfo *, __u64, bool); 325 /* set attributes */ 326 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 327 const unsigned int); 328 int (*set_compression)(const unsigned int, struct cifs_tcon *, 329 struct cifsFileInfo *); 330 /* check if we can send an echo or nor */ 331 bool (*can_echo)(struct TCP_Server_Info *); 332 /* send echo request */ 333 int (*echo)(struct TCP_Server_Info *); 334 /* create directory */ 335 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 336 umode_t mode, struct cifs_tcon *tcon, 337 const char *full_path, 338 struct cifs_sb_info *cifs_sb); 339 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 340 struct cifs_tcon *tcon, const char *name, 341 struct cifs_sb_info *sb); 342 /* set info on created directory */ 343 void (*mkdir_setinfo)(struct inode *, const char *, 344 struct cifs_sb_info *, struct cifs_tcon *, 345 const unsigned int); 346 /* remove directory */ 347 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 348 struct cifs_sb_info *); 349 /* unlink file */ 350 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 351 struct cifs_sb_info *); 352 /* open, rename and delete file */ 353 int (*rename_pending_delete)(const char *, struct dentry *, 354 const unsigned int); 355 /* send rename request */ 356 int (*rename)(const unsigned int, struct cifs_tcon *, const char *, 357 const char *, struct cifs_sb_info *); 358 /* send create hardlink request */ 359 int (*create_hardlink)(const unsigned int, struct cifs_tcon *, 360 const char *, const char *, 361 struct cifs_sb_info *); 362 /* query symlink target */ 363 int (*query_symlink)(const unsigned int, struct cifs_tcon *, 364 struct cifs_sb_info *, const char *, 365 char **, bool); 366 /* open a file for non-posix mounts */ 367 int (*open)(const unsigned int, struct cifs_open_parms *, 368 __u32 *, FILE_ALL_INFO *); 369 /* set fid protocol-specific info */ 370 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 371 /* close a file */ 372 void (*close)(const unsigned int, struct cifs_tcon *, 373 struct cifs_fid *); 374 /* send a flush request to the server */ 375 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 376 /* async read from the server */ 377 int (*async_readv)(struct cifs_readdata *); 378 /* async write to the server */ 379 int (*async_writev)(struct cifs_writedata *, 380 void (*release)(struct kref *)); 381 /* sync read from the server */ 382 int (*sync_read)(const unsigned int, struct cifs_fid *, 383 struct cifs_io_parms *, unsigned int *, char **, 384 int *); 385 /* sync write to the server */ 386 int (*sync_write)(const unsigned int, struct cifs_fid *, 387 struct cifs_io_parms *, unsigned int *, struct kvec *, 388 unsigned long); 389 /* open dir, start readdir */ 390 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 391 const char *, struct cifs_sb_info *, 392 struct cifs_fid *, __u16, 393 struct cifs_search_info *); 394 /* continue readdir */ 395 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 396 struct cifs_fid *, 397 __u16, struct cifs_search_info *srch_inf); 398 /* close dir */ 399 int (*close_dir)(const unsigned int, struct cifs_tcon *, 400 struct cifs_fid *); 401 /* calculate a size of SMB message */ 402 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi); 403 /* check for STATUS_PENDING and process the response if yes */ 404 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 405 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 406 bool (*is_session_expired)(char *); 407 /* send oplock break response */ 408 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *, 409 struct cifsInodeInfo *); 410 /* query remote filesystem */ 411 int (*queryfs)(const unsigned int, struct cifs_tcon *, 412 struct cifs_sb_info *, struct kstatfs *); 413 /* send mandatory brlock to the server */ 414 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 415 __u64, __u32, int, int, bool); 416 /* unlock range of mandatory locks */ 417 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 418 const unsigned int); 419 /* push brlocks from the cache to the server */ 420 int (*push_mand_locks)(struct cifsFileInfo *); 421 /* get lease key of the inode */ 422 void (*get_lease_key)(struct inode *, struct cifs_fid *); 423 /* set lease key of the inode */ 424 void (*set_lease_key)(struct inode *, struct cifs_fid *); 425 /* generate new lease key */ 426 void (*new_lease_key)(struct cifs_fid *); 427 int (*generate_signingkey)(struct cifs_ses *); 428 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *); 429 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 430 struct cifsFileInfo *src_file); 431 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 432 struct cifsFileInfo *src_file, void __user *); 433 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 434 struct cifs_sb_info *, const unsigned char *, 435 char *, unsigned int *); 436 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 437 struct cifs_sb_info *, const unsigned char *, 438 char *, unsigned int *); 439 /* if we can do cache read operations */ 440 bool (*is_read_op)(__u32); 441 /* set oplock level for the inode */ 442 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 443 bool *); 444 /* create lease context buffer for CREATE request */ 445 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 446 /* parse lease context buffer and return oplock/epoch info */ 447 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 448 ssize_t (*copychunk_range)(const unsigned int, 449 struct cifsFileInfo *src_file, 450 struct cifsFileInfo *target_file, 451 u64 src_off, u64 len, u64 dest_off); 452 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 453 struct cifsFileInfo *target_file, u64 src_off, u64 len, 454 u64 dest_off); 455 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 456 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 457 const unsigned char *, const unsigned char *, char *, 458 size_t, struct cifs_sb_info *); 459 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 460 const char *, const void *, const __u16, 461 const struct nls_table *, struct cifs_sb_info *); 462 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, 463 const char *, u32 *); 464 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, 465 const struct cifs_fid *, u32 *); 466 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, 467 int); 468 /* writepages retry size */ 469 unsigned int (*wp_retry_size)(struct inode *); 470 /* get mtu credits */ 471 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, 472 unsigned int *, struct cifs_credits *); 473 /* adjust previously taken mtu credits to request size */ 474 int (*adjust_credits)(struct TCP_Server_Info *server, 475 struct cifs_credits *credits, 476 const unsigned int payload_size); 477 /* check if we need to issue closedir */ 478 bool (*dir_needs_close)(struct cifsFileInfo *); 479 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 480 loff_t); 481 /* init transform request - used for encryption for now */ 482 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 483 struct smb_rqst *, struct smb_rqst *); 484 int (*is_transform_hdr)(void *buf); 485 int (*receive_transform)(struct TCP_Server_Info *, 486 struct mid_q_entry **, char **, int *); 487 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 488 enum securityEnum); 489 int (*next_header)(char *); 490 /* ioctl passthrough for query_info */ 491 int (*ioctl_query_info)(const unsigned int xid, 492 struct cifs_tcon *tcon, 493 struct cifs_sb_info *cifs_sb, 494 __le16 *path, int is_dir, 495 unsigned long p); 496 /* make unix special files (block, char, fifo, socket) */ 497 int (*make_node)(unsigned int xid, 498 struct inode *inode, 499 struct dentry *dentry, 500 struct cifs_tcon *tcon, 501 char *full_path, 502 umode_t mode, 503 dev_t device_number); 504 /* version specific fiemap implementation */ 505 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 506 struct fiemap_extent_info *, u64, u64); 507 /* version specific llseek implementation */ 508 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 509 }; 510 511 struct smb_version_values { 512 char *version_string; 513 __u16 protocol_id; 514 __u32 req_capabilities; 515 __u32 large_lock_type; 516 __u32 exclusive_lock_type; 517 __u32 shared_lock_type; 518 __u32 unlock_lock_type; 519 size_t header_preamble_size; 520 size_t header_size; 521 size_t max_header_size; 522 size_t read_rsp_size; 523 __le16 lock_cmd; 524 unsigned int cap_unix; 525 unsigned int cap_nt_find; 526 unsigned int cap_large_files; 527 __u16 signing_enabled; 528 __u16 signing_required; 529 size_t create_lease_size; 530 }; 531 532 #define HEADER_SIZE(server) (server->vals->header_size) 533 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 534 535 struct smb_vol { 536 char *username; 537 char *password; 538 char *domainname; 539 char *UNC; 540 char *iocharset; /* local code page for mapping to and from Unicode */ 541 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ 542 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ 543 kuid_t cred_uid; 544 kuid_t linux_uid; 545 kgid_t linux_gid; 546 kuid_t backupuid; 547 kgid_t backupgid; 548 umode_t file_mode; 549 umode_t dir_mode; 550 enum securityEnum sectype; /* sectype requested via mnt opts */ 551 bool sign; /* was signing requested via mnt opts? */ 552 bool ignore_signature:1; 553 bool retry:1; 554 bool intr:1; 555 bool setuids:1; 556 bool setuidfromacl:1; 557 bool override_uid:1; 558 bool override_gid:1; 559 bool dynperm:1; 560 bool noperm:1; 561 bool mode_ace:1; 562 bool no_psx_acl:1; /* set if posix acl support should be disabled */ 563 bool cifs_acl:1; 564 bool backupuid_specified; /* mount option backupuid is specified */ 565 bool backupgid_specified; /* mount option backupgid is specified */ 566 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/ 567 bool server_ino:1; /* use inode numbers from server ie UniqueId */ 568 bool direct_io:1; 569 bool strict_io:1; /* strict cache behavior */ 570 bool cache_ro:1; 571 bool cache_rw:1; 572 bool remap:1; /* set to remap seven reserved chars in filenames */ 573 bool sfu_remap:1; /* remap seven reserved chars ala SFU */ 574 bool posix_paths:1; /* unset to not ask for posix pathnames. */ 575 bool no_linux_ext:1; 576 bool linux_ext:1; 577 bool sfu_emul:1; 578 bool nullauth:1; /* attempt to authenticate with null user */ 579 bool nocase:1; /* request case insensitive filenames */ 580 bool nobrl:1; /* disable sending byte range locks to srv */ 581 bool nohandlecache:1; /* disable caching dir handles if srvr probs */ 582 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ 583 bool seal:1; /* request transport encryption on share */ 584 bool nodfs:1; /* Do not request DFS, even if available */ 585 bool local_lease:1; /* check leases only on local system, not remote */ 586 bool noblocksnd:1; 587 bool noautotune:1; 588 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ 589 bool no_lease:1; /* disable requesting leases */ 590 bool fsc:1; /* enable fscache */ 591 bool mfsymlinks:1; /* use Minshall+French Symlinks */ 592 bool multiuser:1; 593 bool rwpidforward:1; /* pid forward for read/write operations */ 594 bool nosharesock:1; 595 bool persistent:1; 596 bool nopersistent:1; 597 bool resilient:1; /* noresilient not required since not fored for CA */ 598 bool domainauto:1; 599 bool rdma:1; 600 unsigned int bsize; 601 unsigned int rsize; 602 unsigned int wsize; 603 unsigned int min_offload; 604 bool sockopt_tcp_nodelay:1; 605 unsigned long actimeo; /* attribute cache timeout (jiffies) */ 606 struct smb_version_operations *ops; 607 struct smb_version_values *vals; 608 char *prepath; 609 struct sockaddr_storage dstaddr; /* destination address */ 610 struct sockaddr_storage srcaddr; /* allow binding to a local IP */ 611 struct nls_table *local_nls; 612 unsigned int echo_interval; /* echo interval in secs */ 613 __u64 snapshot_time; /* needed for timewarp tokens */ 614 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 615 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */ 616 __u16 compression; /* compression algorithm 0xFFFF default 0=disabled */ 617 bool rootfs:1; /* if it's a SMB root file system */ 618 }; 619 620 /** 621 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 622 * trying to reuse existing superblock for a new mount 623 */ 624 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 625 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 626 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 627 CIFS_MOUNT_MAP_SFM_CHR | \ 628 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 629 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 630 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 631 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 632 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 633 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 634 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 635 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 636 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 637 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 638 639 /** 640 * Generic VFS superblock mount flags (s_flags) to consider when 641 * trying to reuse existing superblock for a new mount 642 */ 643 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 644 SB_NODEV | SB_SYNCHRONOUS) 645 646 struct cifs_mnt_data { 647 struct cifs_sb_info *cifs_sb; 648 struct smb_vol *vol; 649 int flags; 650 }; 651 652 static inline unsigned int get_rfc1002_length(void * buf)653 get_rfc1002_length(void *buf) 654 { 655 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 656 } 657 658 static inline void inc_rfc1001_len(void * buf,int count)659 inc_rfc1001_len(void *buf, int count) 660 { 661 be32_add_cpu((__be32 *)buf, count); 662 } 663 664 struct TCP_Server_Info { 665 struct list_head tcp_ses_list; 666 struct list_head smb_ses_list; 667 int srv_count; /* reference counter */ 668 /* 15 character server name + 0x20 16th byte indicating type = srv */ 669 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 670 struct smb_version_operations *ops; 671 struct smb_version_values *vals; 672 enum statusEnum tcpStatus; /* what we think the status is */ 673 char *hostname; /* hostname portion of UNC string */ 674 struct socket *ssocket; 675 struct sockaddr_storage dstaddr; 676 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 677 #ifdef CONFIG_NET_NS 678 struct net *net; 679 #endif 680 wait_queue_head_t response_q; 681 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 682 struct list_head pending_mid_q; 683 bool noblocksnd; /* use blocking sendmsg */ 684 bool noautotune; /* do not autotune send buf sizes */ 685 bool tcp_nodelay; 686 unsigned int credits; /* send no more requests at once */ 687 unsigned int max_credits; /* can override large 32000 default at mnt */ 688 unsigned int in_flight; /* number of requests on the wire to server */ 689 unsigned int max_in_flight; /* max number of requests that were on wire */ 690 spinlock_t req_lock; /* protect the two values above */ 691 struct mutex srv_mutex; 692 struct task_struct *tsk; 693 char server_GUID[16]; 694 __u16 sec_mode; 695 bool sign; /* is signing enabled on this connection? */ 696 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 697 bool session_estab; /* mark when very first sess is established */ 698 int echo_credits; /* echo reserved slots */ 699 int oplock_credits; /* oplock break reserved slots */ 700 bool echoes:1; /* enable echoes */ 701 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 702 u16 dialect; /* dialect index that server chose */ 703 bool oplocks:1; /* enable oplocks */ 704 unsigned int maxReq; /* Clients should submit no more */ 705 /* than maxReq distinct unanswered SMBs to the server when using */ 706 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 707 unsigned int maxBuf; /* maxBuf specifies the maximum */ 708 /* message size the server can send or receive for non-raw SMBs */ 709 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 710 /* when socket is setup (and during reconnect) before NegProt sent */ 711 unsigned int max_rw; /* maxRw specifies the maximum */ 712 /* message size the server can send or receive for */ 713 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 714 unsigned int capabilities; /* selective disabling of caps by smb sess */ 715 int timeAdj; /* Adjust for difference in server time zone in sec */ 716 __u64 CurrentMid; /* multiplex id - rotating counter */ 717 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 718 /* 16th byte of RFC1001 workstation name is always null */ 719 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 720 __u32 sequence_number; /* for signing, protected by srv_mutex */ 721 __u32 reconnect_instance; /* incremented on each reconnect */ 722 struct session_key session_key; 723 unsigned long lstrp; /* when we got last response from this server */ 724 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 725 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */ 726 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 727 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 728 char negflavor; /* NEGOTIATE response flavor */ 729 /* extended security flavors that server supports */ 730 bool sec_ntlmssp; /* supports NTLMSSP */ 731 bool sec_kerberosu2u; /* supports U2U Kerberos */ 732 bool sec_kerberos; /* supports plain Kerberos */ 733 bool sec_mskerberos; /* supports legacy MS Kerberos */ 734 bool large_buf; /* is current buffer large? */ 735 /* use SMBD connection instead of socket */ 736 bool rdma; 737 /* point to the SMBD connection if RDMA is used instead of socket */ 738 struct smbd_connection *smbd_conn; 739 struct delayed_work echo; /* echo ping workqueue job */ 740 char *smallbuf; /* pointer to current "small" buffer */ 741 char *bigbuf; /* pointer to current "big" buffer */ 742 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 743 unsigned int pdu_size; 744 unsigned int total_read; /* total amount of data read in this pass */ 745 #ifdef CONFIG_CIFS_FSCACHE 746 struct fscache_cookie *fscache; /* client index cache cookie */ 747 #endif 748 #ifdef CONFIG_CIFS_STATS2 749 atomic_t in_send; /* requests trying to send */ 750 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 751 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 752 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 753 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 754 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 755 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 756 #endif /* STATS2 */ 757 unsigned int max_read; 758 unsigned int max_write; 759 unsigned int min_offload; 760 __le16 compress_algorithm; 761 __le16 cipher_type; 762 /* save initital negprot hash */ 763 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 764 bool posix_ext_supported; 765 struct delayed_work reconnect; /* reconnect workqueue job */ 766 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 767 unsigned long echo_interval; 768 769 /* 770 * Number of targets available for reconnect. The more targets 771 * the more tasks have to wait to let the demultiplex thread 772 * reconnect. 773 */ 774 int nr_targets; 775 bool noblockcnt; /* use non-blocking connect() */ 776 }; 777 778 struct cifs_credits { 779 unsigned int value; 780 unsigned int instance; 781 }; 782 783 static inline unsigned int in_flight(struct TCP_Server_Info * server)784 in_flight(struct TCP_Server_Info *server) 785 { 786 unsigned int num; 787 spin_lock(&server->req_lock); 788 num = server->in_flight; 789 spin_unlock(&server->req_lock); 790 return num; 791 } 792 793 static inline bool has_credits(struct TCP_Server_Info * server,int * credits,int num_credits)794 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 795 { 796 int num; 797 spin_lock(&server->req_lock); 798 num = *credits; 799 spin_unlock(&server->req_lock); 800 return num >= num_credits; 801 } 802 803 static inline void add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)804 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 805 const int optype) 806 { 807 server->ops->add_credits(server, credits, optype); 808 } 809 810 static inline void add_credits_and_wake_if(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)811 add_credits_and_wake_if(struct TCP_Server_Info *server, 812 const struct cifs_credits *credits, const int optype) 813 { 814 if (credits->value) { 815 server->ops->add_credits(server, credits, optype); 816 wake_up(&server->request_q); 817 } 818 } 819 820 static inline void set_credits(struct TCP_Server_Info * server,const int val)821 set_credits(struct TCP_Server_Info *server, const int val) 822 { 823 server->ops->set_credits(server, val); 824 } 825 826 static inline int adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)827 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 828 const unsigned int payload_size) 829 { 830 return server->ops->adjust_credits ? 831 server->ops->adjust_credits(server, credits, payload_size) : 0; 832 } 833 834 static inline __le64 get_next_mid64(struct TCP_Server_Info * server)835 get_next_mid64(struct TCP_Server_Info *server) 836 { 837 return cpu_to_le64(server->ops->get_next_mid(server)); 838 } 839 840 static inline __le16 get_next_mid(struct TCP_Server_Info * server)841 get_next_mid(struct TCP_Server_Info *server) 842 { 843 __u16 mid = server->ops->get_next_mid(server); 844 /* 845 * The value in the SMB header should be little endian for easy 846 * on-the-wire decoding. 847 */ 848 return cpu_to_le16(mid); 849 } 850 851 static inline void revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)852 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 853 { 854 if (server->ops->revert_current_mid) 855 server->ops->revert_current_mid(server, val); 856 } 857 858 static inline void revert_current_mid_from_hdr(struct TCP_Server_Info * server,const struct smb2_sync_hdr * shdr)859 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 860 const struct smb2_sync_hdr *shdr) 861 { 862 unsigned int num = le16_to_cpu(shdr->CreditCharge); 863 864 return revert_current_mid(server, num > 0 ? num : 1); 865 } 866 867 static inline __u16 get_mid(const struct smb_hdr * smb)868 get_mid(const struct smb_hdr *smb) 869 { 870 return le16_to_cpu(smb->Mid); 871 } 872 873 static inline bool compare_mid(__u16 mid,const struct smb_hdr * smb)874 compare_mid(__u16 mid, const struct smb_hdr *smb) 875 { 876 return mid == le16_to_cpu(smb->Mid); 877 } 878 879 /* 880 * When the server supports very large reads and writes via POSIX extensions, 881 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 882 * including the RFC1001 length. 883 * 884 * Note that this might make for "interesting" allocation problems during 885 * writeback however as we have to allocate an array of pointers for the 886 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 887 * 888 * For reads, there is a similar problem as we need to allocate an array 889 * of kvecs to handle the receive, though that should only need to be done 890 * once. 891 */ 892 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 893 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 894 895 /* 896 * When the server doesn't allow large posix writes, only allow a rsize/wsize 897 * of 2^17-1 minus the size of the call header. That allows for a read or 898 * write up to the maximum size described by RFC1002. 899 */ 900 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 901 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 902 903 /* 904 * The default wsize is 1M. find_get_pages seems to return a maximum of 256 905 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill 906 * a single wsize request with a single call. 907 */ 908 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 909 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024) 910 911 /* 912 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 913 * those values when posix extensions aren't in force. In actuality here, we 914 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 915 * to be ok with the extra byte even though Windows doesn't send writes that 916 * are that large. 917 * 918 * Citation: 919 * 920 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 921 */ 922 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 923 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 924 925 /* 926 * Macros to allow the TCP_Server_Info->net field and related code to drop out 927 * when CONFIG_NET_NS isn't set. 928 */ 929 930 #ifdef CONFIG_NET_NS 931 cifs_net_ns(struct TCP_Server_Info * srv)932 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 933 { 934 return srv->net; 935 } 936 cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)937 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 938 { 939 srv->net = net; 940 } 941 942 #else 943 cifs_net_ns(struct TCP_Server_Info * srv)944 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 945 { 946 return &init_net; 947 } 948 cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)949 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 950 { 951 } 952 953 #endif 954 955 struct cifs_server_iface { 956 size_t speed; 957 unsigned int rdma_capable : 1; 958 unsigned int rss_capable : 1; 959 struct sockaddr_storage sockaddr; 960 }; 961 962 /* 963 * Session structure. One of these for each uid session with a particular host 964 */ 965 struct cifs_ses { 966 struct list_head smb_ses_list; 967 struct list_head tcon_list; 968 struct cifs_tcon *tcon_ipc; 969 struct mutex session_mutex; 970 struct TCP_Server_Info *server; /* pointer to server info */ 971 int ses_count; /* reference counter */ 972 enum statusEnum status; /* updates protected by GlobalMid_Lock */ 973 unsigned overrideSecFlg; /* if non-zero override global sec flags */ 974 char *serverOS; /* name of operating system underlying server */ 975 char *serverNOS; /* name of network operating system of server */ 976 char *serverDomain; /* security realm of server */ 977 __u64 Suid; /* remote smb uid */ 978 kuid_t linux_uid; /* overriding owner of files on the mount */ 979 kuid_t cred_uid; /* owner of credentials */ 980 unsigned int capabilities; 981 char serverName[SERVER_NAME_LEN_WITH_NULL]; 982 char *user_name; /* must not be null except during init of sess 983 and after mount option parsing we fill it */ 984 char *domainName; 985 char *password; 986 struct session_key auth_key; 987 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 988 enum securityEnum sectype; /* what security flavor was specified? */ 989 bool sign; /* is signing required? */ 990 bool need_reconnect:1; /* connection reset, uid now invalid */ 991 bool domainAuto:1; 992 __u16 session_flags; 993 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 994 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE]; 995 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE]; 996 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 997 998 /* 999 * Network interfaces available on the server this session is 1000 * connected to. 1001 * 1002 * Other channels can be opened by connecting and binding this 1003 * session to interfaces from this list. 1004 * 1005 * iface_lock should be taken when accessing any of these fields 1006 */ 1007 spinlock_t iface_lock; 1008 struct cifs_server_iface *iface_list; 1009 size_t iface_count; 1010 unsigned long iface_last_update; /* jiffies */ 1011 }; 1012 1013 static inline bool cap_unix(struct cifs_ses * ses)1014 cap_unix(struct cifs_ses *ses) 1015 { 1016 return ses->server->vals->cap_unix & ses->capabilities; 1017 } 1018 1019 struct cached_fid { 1020 bool is_valid:1; /* Do we have a useable root fid */ 1021 bool file_all_info_is_valid:1; 1022 1023 struct kref refcount; 1024 struct cifs_fid *fid; 1025 struct mutex fid_mutex; 1026 struct cifs_tcon *tcon; 1027 struct work_struct lease_break; 1028 struct smb2_file_all_info file_all_info; 1029 }; 1030 1031 /* 1032 * there is one of these for each connection to a resource on a particular 1033 * session 1034 */ 1035 struct cifs_tcon { 1036 struct list_head tcon_list; 1037 int tc_count; 1038 struct list_head rlist; /* reconnect list */ 1039 atomic_t num_local_opens; /* num of all opens including disconnected */ 1040 atomic_t num_remote_opens; /* num of all network opens on server */ 1041 struct list_head openFileList; 1042 spinlock_t open_file_lock; /* protects list above */ 1043 struct cifs_ses *ses; /* pointer to session associated with */ 1044 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1045 char *nativeFileSystem; 1046 char *password; /* for share-level security */ 1047 __u32 tid; /* The 4 byte tree id */ 1048 __u16 Flags; /* optional support bits */ 1049 enum statusEnum tidStatus; 1050 atomic_t num_smbs_sent; 1051 union { 1052 struct { 1053 atomic_t num_writes; 1054 atomic_t num_reads; 1055 atomic_t num_flushes; 1056 atomic_t num_oplock_brks; 1057 atomic_t num_opens; 1058 atomic_t num_closes; 1059 atomic_t num_deletes; 1060 atomic_t num_mkdirs; 1061 atomic_t num_posixopens; 1062 atomic_t num_posixmkdirs; 1063 atomic_t num_rmdirs; 1064 atomic_t num_renames; 1065 atomic_t num_t2renames; 1066 atomic_t num_ffirst; 1067 atomic_t num_fnext; 1068 atomic_t num_fclose; 1069 atomic_t num_hardlinks; 1070 atomic_t num_symlinks; 1071 atomic_t num_locks; 1072 atomic_t num_acl_get; 1073 atomic_t num_acl_set; 1074 } cifs_stats; 1075 struct { 1076 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1077 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1078 } smb2_stats; 1079 } stats; 1080 __u64 bytes_read; 1081 __u64 bytes_written; 1082 spinlock_t stat_lock; /* protects the two fields above */ 1083 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1084 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1085 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1086 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1087 bool pipe:1; /* set if connection to pipe share */ 1088 bool print:1; /* set if connection to printer share */ 1089 bool retry:1; 1090 bool nocase:1; 1091 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1092 bool seal:1; /* transport encryption for this mounted share */ 1093 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1094 for this mount even if server would support */ 1095 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1096 bool local_lease:1; /* check leases (only) on local system not remote */ 1097 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1098 bool broken_sparse_sup; /* if server or share does not support sparse */ 1099 bool need_reconnect:1; /* connection reset, tid now invalid */ 1100 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1101 bool use_resilient:1; /* use resilient instead of durable handles */ 1102 bool use_persistent:1; /* use persistent instead of durable handles */ 1103 bool no_lease:1; /* Do not request leases on files or directories */ 1104 __le32 capabilities; 1105 __u32 share_flags; 1106 __u32 maximal_access; 1107 __u32 vol_serial_number; 1108 __le64 vol_create_time; 1109 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1110 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1111 __u32 ss_flags; /* sector size flags */ 1112 __u32 perf_sector_size; /* best sector size for perf */ 1113 __u32 max_chunks; 1114 __u32 max_bytes_chunk; 1115 __u32 max_bytes_copy; 1116 #ifdef CONFIG_CIFS_FSCACHE 1117 u64 resource_id; /* server resource id */ 1118 struct fscache_cookie *fscache; /* cookie for share */ 1119 #endif 1120 struct list_head pending_opens; /* list of incomplete opens */ 1121 struct cached_fid crfid; /* Cached root fid */ 1122 /* BB add field for back pointer to sb struct(s)? */ 1123 #ifdef CONFIG_CIFS_DFS_UPCALL 1124 char *dfs_path; 1125 int remap:2; 1126 struct list_head ulist; /* cache update list */ 1127 #endif 1128 }; 1129 1130 /* 1131 * This is a refcounted and timestamped container for a tcon pointer. The 1132 * container holds a tcon reference. It is considered safe to free one of 1133 * these when the tl_count goes to 0. The tl_time is the time of the last 1134 * "get" on the container. 1135 */ 1136 struct tcon_link { 1137 struct rb_node tl_rbnode; 1138 kuid_t tl_uid; 1139 unsigned long tl_flags; 1140 #define TCON_LINK_MASTER 0 1141 #define TCON_LINK_PENDING 1 1142 #define TCON_LINK_IN_TREE 2 1143 unsigned long tl_time; 1144 atomic_t tl_count; 1145 struct cifs_tcon *tl_tcon; 1146 }; 1147 1148 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1149 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1150 1151 static inline struct cifs_tcon * tlink_tcon(struct tcon_link * tlink)1152 tlink_tcon(struct tcon_link *tlink) 1153 { 1154 return tlink->tl_tcon; 1155 } 1156 1157 static inline struct tcon_link * cifs_sb_master_tlink(struct cifs_sb_info * cifs_sb)1158 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1159 { 1160 return cifs_sb->master_tlink; 1161 } 1162 1163 extern void cifs_put_tlink(struct tcon_link *tlink); 1164 1165 static inline struct tcon_link * cifs_get_tlink(struct tcon_link * tlink)1166 cifs_get_tlink(struct tcon_link *tlink) 1167 { 1168 if (tlink && !IS_ERR(tlink)) 1169 atomic_inc(&tlink->tl_count); 1170 return tlink; 1171 } 1172 1173 /* This function is always expected to succeed */ 1174 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1175 1176 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1177 1178 struct cifs_pending_open { 1179 struct list_head olist; 1180 struct tcon_link *tlink; 1181 __u8 lease_key[16]; 1182 __u32 oplock; 1183 }; 1184 1185 /* 1186 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1187 * This is used to track byte stream locks on the file 1188 */ 1189 struct cifsLockInfo { 1190 struct list_head llist; /* pointer to next cifsLockInfo */ 1191 struct list_head blist; /* pointer to locks blocked on this */ 1192 wait_queue_head_t block_q; 1193 __u64 offset; 1194 __u64 length; 1195 __u32 pid; 1196 __u16 type; 1197 __u16 flags; 1198 }; 1199 1200 /* 1201 * One of these for each open instance of a file 1202 */ 1203 struct cifs_search_info { 1204 loff_t index_of_last_entry; 1205 __u16 entries_in_buffer; 1206 __u16 info_level; 1207 __u32 resume_key; 1208 char *ntwrk_buf_start; 1209 char *srch_entries_start; 1210 char *last_entry; 1211 const char *presume_name; 1212 unsigned int resume_name_len; 1213 bool endOfSearch:1; 1214 bool emptyDir:1; 1215 bool unicode:1; 1216 bool smallBuf:1; /* so we know which buf_release function to call */ 1217 }; 1218 1219 #define ACL_NO_MODE ((umode_t)(-1)) 1220 struct cifs_open_parms { 1221 struct cifs_tcon *tcon; 1222 struct cifs_sb_info *cifs_sb; 1223 int disposition; 1224 int desired_access; 1225 int create_options; 1226 const char *path; 1227 struct cifs_fid *fid; 1228 umode_t mode; 1229 bool reconnect:1; 1230 }; 1231 1232 struct cifs_fid { 1233 __u16 netfid; 1234 __u64 persistent_fid; /* persist file id for smb2 */ 1235 __u64 volatile_fid; /* volatile file id for smb2 */ 1236 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1237 __u8 create_guid[16]; 1238 __u32 access; 1239 struct cifs_pending_open *pending_open; 1240 unsigned int epoch; 1241 #ifdef CONFIG_CIFS_DEBUG2 1242 __u64 mid; 1243 #endif /* CIFS_DEBUG2 */ 1244 bool purge_cache; 1245 }; 1246 1247 struct cifs_fid_locks { 1248 struct list_head llist; 1249 struct cifsFileInfo *cfile; /* fid that owns locks */ 1250 struct list_head locks; /* locks held by fid above */ 1251 }; 1252 1253 struct cifsFileInfo { 1254 /* following two lists are protected by tcon->open_file_lock */ 1255 struct list_head tlist; /* pointer to next fid owned by tcon */ 1256 struct list_head flist; /* next fid (file instance) for this inode */ 1257 /* lock list below protected by cifsi->lock_sem */ 1258 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1259 kuid_t uid; /* allows finding which FileInfo structure */ 1260 __u32 pid; /* process id who opened file */ 1261 struct cifs_fid fid; /* file id from remote */ 1262 struct list_head rlist; /* reconnect list */ 1263 /* BB add lock scope info here if needed */ ; 1264 /* lock scope id (0 if none) */ 1265 struct dentry *dentry; 1266 struct tcon_link *tlink; 1267 unsigned int f_flags; 1268 bool invalidHandle:1; /* file closed via session abend */ 1269 bool oplock_break_cancelled:1; 1270 unsigned int oplock_epoch; /* epoch from the lease break */ 1271 __u32 oplock_level; /* oplock/lease level from the lease break */ 1272 int count; 1273 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1274 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1275 struct cifs_search_info srch_inf; 1276 struct work_struct oplock_break; /* work for oplock breaks */ 1277 struct work_struct put; /* work for the final part of _put */ 1278 }; 1279 1280 struct cifs_io_parms { 1281 __u16 netfid; 1282 __u64 persistent_fid; /* persist file id for smb2 */ 1283 __u64 volatile_fid; /* volatile file id for smb2 */ 1284 __u32 pid; 1285 __u64 offset; 1286 unsigned int length; 1287 struct cifs_tcon *tcon; 1288 }; 1289 1290 struct cifs_aio_ctx { 1291 struct kref refcount; 1292 struct list_head list; 1293 struct mutex aio_mutex; 1294 struct completion done; 1295 struct iov_iter iter; 1296 struct kiocb *iocb; 1297 struct cifsFileInfo *cfile; 1298 struct bio_vec *bv; 1299 loff_t pos; 1300 unsigned int npages; 1301 ssize_t rc; 1302 unsigned int len; 1303 unsigned int total_len; 1304 bool should_dirty; 1305 /* 1306 * Indicates if this aio_ctx is for direct_io, 1307 * If yes, iter is a copy of the user passed iov_iter 1308 */ 1309 bool direct_io; 1310 }; 1311 1312 struct cifs_readdata; 1313 1314 /* asynchronous read support */ 1315 struct cifs_readdata { 1316 struct kref refcount; 1317 struct list_head list; 1318 struct completion done; 1319 struct cifsFileInfo *cfile; 1320 struct address_space *mapping; 1321 struct cifs_aio_ctx *ctx; 1322 __u64 offset; 1323 unsigned int bytes; 1324 unsigned int got_bytes; 1325 pid_t pid; 1326 int result; 1327 struct work_struct work; 1328 int (*read_into_pages)(struct TCP_Server_Info *server, 1329 struct cifs_readdata *rdata, 1330 unsigned int len); 1331 int (*copy_into_pages)(struct TCP_Server_Info *server, 1332 struct cifs_readdata *rdata, 1333 struct iov_iter *iter); 1334 struct kvec iov[2]; 1335 #ifdef CONFIG_CIFS_SMB_DIRECT 1336 struct smbd_mr *mr; 1337 #endif 1338 unsigned int pagesz; 1339 unsigned int page_offset; 1340 unsigned int tailsz; 1341 struct cifs_credits credits; 1342 unsigned int nr_pages; 1343 struct page **pages; 1344 }; 1345 1346 struct cifs_writedata; 1347 1348 /* asynchronous write support */ 1349 struct cifs_writedata { 1350 struct kref refcount; 1351 struct list_head list; 1352 struct completion done; 1353 enum writeback_sync_modes sync_mode; 1354 struct work_struct work; 1355 struct cifsFileInfo *cfile; 1356 struct cifs_aio_ctx *ctx; 1357 __u64 offset; 1358 pid_t pid; 1359 unsigned int bytes; 1360 int result; 1361 #ifdef CONFIG_CIFS_SMB_DIRECT 1362 struct smbd_mr *mr; 1363 #endif 1364 unsigned int pagesz; 1365 unsigned int page_offset; 1366 unsigned int tailsz; 1367 struct cifs_credits credits; 1368 unsigned int nr_pages; 1369 struct page **pages; 1370 }; 1371 1372 /* 1373 * Take a reference on the file private data. Must be called with 1374 * cfile->file_info_lock held. 1375 */ 1376 static inline void cifsFileInfo_get_locked(struct cifsFileInfo * cifs_file)1377 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1378 { 1379 ++cifs_file->count; 1380 } 1381 1382 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1383 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1384 bool offload); 1385 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1386 1387 #define CIFS_CACHE_READ_FLG 1 1388 #define CIFS_CACHE_HANDLE_FLG 2 1389 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1390 #define CIFS_CACHE_WRITE_FLG 4 1391 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1392 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1393 1394 #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)) 1395 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1396 #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)) 1397 1398 /* 1399 * One of these for each file inode 1400 */ 1401 1402 struct cifsInodeInfo { 1403 bool can_cache_brlcks; 1404 struct list_head llist; /* locks helb by this inode */ 1405 /* 1406 * NOTE: Some code paths call down_read(lock_sem) twice, so 1407 * we must always use use cifs_down_write() instead of down_write() 1408 * for this semaphore to avoid deadlocks. 1409 */ 1410 struct rw_semaphore lock_sem; /* protect the fields above */ 1411 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1412 struct list_head openFileList; 1413 spinlock_t open_file_lock; /* protects openFileList */ 1414 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1415 unsigned int oplock; /* oplock/lease level we have */ 1416 unsigned int epoch; /* used to track lease state changes */ 1417 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1418 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1419 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1420 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1421 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1422 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1423 unsigned long flags; 1424 spinlock_t writers_lock; 1425 unsigned int writers; /* Number of writers on this inode */ 1426 unsigned long time; /* jiffies of last update of inode */ 1427 u64 server_eof; /* current file size on server -- protected by i_lock */ 1428 u64 uniqueid; /* server inode number */ 1429 u64 createtime; /* creation time on server */ 1430 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1431 #ifdef CONFIG_CIFS_FSCACHE 1432 struct fscache_cookie *fscache; 1433 #endif 1434 struct inode vfs_inode; 1435 }; 1436 1437 static inline struct cifsInodeInfo * CIFS_I(struct inode * inode)1438 CIFS_I(struct inode *inode) 1439 { 1440 return container_of(inode, struct cifsInodeInfo, vfs_inode); 1441 } 1442 1443 static inline struct cifs_sb_info * CIFS_SB(struct super_block * sb)1444 CIFS_SB(struct super_block *sb) 1445 { 1446 return sb->s_fs_info; 1447 } 1448 1449 static inline struct cifs_sb_info * CIFS_FILE_SB(struct file * file)1450 CIFS_FILE_SB(struct file *file) 1451 { 1452 return CIFS_SB(file_inode(file)->i_sb); 1453 } 1454 CIFS_DIR_SEP(const struct cifs_sb_info * cifs_sb)1455 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1456 { 1457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1458 return '/'; 1459 else 1460 return '\\'; 1461 } 1462 1463 static inline void convert_delimiter(char * path,char delim)1464 convert_delimiter(char *path, char delim) 1465 { 1466 char old_delim, *pos; 1467 1468 if (delim == '/') 1469 old_delim = '\\'; 1470 else 1471 old_delim = '/'; 1472 1473 pos = path; 1474 while ((pos = strchr(pos, old_delim))) 1475 *pos = delim; 1476 } 1477 1478 #define cifs_stats_inc atomic_inc 1479 cifs_stats_bytes_written(struct cifs_tcon * tcon,unsigned int bytes)1480 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1481 unsigned int bytes) 1482 { 1483 if (bytes) { 1484 spin_lock(&tcon->stat_lock); 1485 tcon->bytes_written += bytes; 1486 spin_unlock(&tcon->stat_lock); 1487 } 1488 } 1489 cifs_stats_bytes_read(struct cifs_tcon * tcon,unsigned int bytes)1490 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1491 unsigned int bytes) 1492 { 1493 spin_lock(&tcon->stat_lock); 1494 tcon->bytes_read += bytes; 1495 spin_unlock(&tcon->stat_lock); 1496 } 1497 1498 1499 /* 1500 * This is the prototype for the mid receive function. This function is for 1501 * receiving the rest of the SMB frame, starting with the WordCount (which is 1502 * just after the MID in struct smb_hdr). Note: 1503 * 1504 * - This will be called by cifsd, with no locks held. 1505 * - The mid will still be on the pending_mid_q. 1506 * - mid->resp_buf will point to the current buffer. 1507 * 1508 * Returns zero on a successful receive, or an error. The receive state in 1509 * the TCP_Server_Info will also be updated. 1510 */ 1511 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1512 struct mid_q_entry *mid); 1513 1514 /* 1515 * This is the prototype for the mid callback function. This is called once the 1516 * mid has been received off of the socket. When creating one, take special 1517 * care to avoid deadlocks. Things to bear in mind: 1518 * 1519 * - it will be called by cifsd, with no locks held 1520 * - the mid will be removed from any lists 1521 */ 1522 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1523 1524 /* 1525 * This is the protopyte for mid handle function. This is called once the mid 1526 * has been recognized after decryption of the message. 1527 */ 1528 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1529 struct mid_q_entry *mid); 1530 1531 /* one of these for every pending CIFS request to the server */ 1532 struct mid_q_entry { 1533 struct list_head qhead; /* mids waiting on reply from this server */ 1534 struct kref refcount; 1535 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1536 __u64 mid; /* multiplex id */ 1537 __u16 credits; /* number of credits consumed by this mid */ 1538 __u16 credits_received; /* number of credits from the response */ 1539 __u32 pid; /* process id */ 1540 __u32 sequence_number; /* for CIFS signing */ 1541 unsigned long when_alloc; /* when mid was created */ 1542 #ifdef CONFIG_CIFS_STATS2 1543 unsigned long when_sent; /* time when smb send finished */ 1544 unsigned long when_received; /* when demux complete (taken off wire) */ 1545 #endif 1546 mid_receive_t *receive; /* call receive callback */ 1547 mid_callback_t *callback; /* call completion callback */ 1548 mid_handle_t *handle; /* call handle mid callback */ 1549 void *callback_data; /* general purpose pointer for callback */ 1550 struct task_struct *creator; 1551 void *resp_buf; /* pointer to received SMB header */ 1552 unsigned int resp_buf_size; 1553 int mid_state; /* wish this were enum but can not pass to wait_event */ 1554 unsigned int mid_flags; 1555 __le16 command; /* smb command code */ 1556 unsigned int optype; /* operation type */ 1557 bool large_buf:1; /* if valid response, is pointer to large buf */ 1558 bool multiRsp:1; /* multiple trans2 responses for one request */ 1559 bool multiEnd:1; /* both received */ 1560 bool decrypted:1; /* decrypted entry */ 1561 }; 1562 1563 struct close_cancelled_open { 1564 struct cifs_fid fid; 1565 struct cifs_tcon *tcon; 1566 struct work_struct work; 1567 }; 1568 1569 /* Make code in transport.c a little cleaner by moving 1570 update of optional stats into function below */ 1571 #ifdef CONFIG_CIFS_STATS2 1572 cifs_in_send_inc(struct TCP_Server_Info * server)1573 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1574 { 1575 atomic_inc(&server->in_send); 1576 } 1577 cifs_in_send_dec(struct TCP_Server_Info * server)1578 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1579 { 1580 atomic_dec(&server->in_send); 1581 } 1582 cifs_num_waiters_inc(struct TCP_Server_Info * server)1583 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1584 { 1585 atomic_inc(&server->num_waiters); 1586 } 1587 cifs_num_waiters_dec(struct TCP_Server_Info * server)1588 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1589 { 1590 atomic_dec(&server->num_waiters); 1591 } 1592 cifs_save_when_sent(struct mid_q_entry * mid)1593 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1594 { 1595 mid->when_sent = jiffies; 1596 } 1597 #else cifs_in_send_inc(struct TCP_Server_Info * server)1598 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1599 { 1600 } cifs_in_send_dec(struct TCP_Server_Info * server)1601 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1602 { 1603 } 1604 cifs_num_waiters_inc(struct TCP_Server_Info * server)1605 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1606 { 1607 } 1608 cifs_num_waiters_dec(struct TCP_Server_Info * server)1609 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1610 { 1611 } 1612 cifs_save_when_sent(struct mid_q_entry * mid)1613 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1614 { 1615 } 1616 #endif 1617 1618 /* for pending dnotify requests */ 1619 struct dir_notify_req { 1620 struct list_head lhead; 1621 __le16 Pid; 1622 __le16 PidHigh; 1623 __u16 Mid; 1624 __u16 Tid; 1625 __u16 Uid; 1626 __u16 netfid; 1627 __u32 filter; /* CompletionFilter (for multishot) */ 1628 int multishot; 1629 struct file *pfile; 1630 }; 1631 1632 struct dfs_info3_param { 1633 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1634 int path_consumed; 1635 int server_type; 1636 int ref_flag; 1637 char *path_name; 1638 char *node_name; 1639 int ttl; 1640 }; 1641 1642 /* 1643 * common struct for holding inode info when searching for or updating an 1644 * inode with new info 1645 */ 1646 1647 #define CIFS_FATTR_DFS_REFERRAL 0x1 1648 #define CIFS_FATTR_DELETE_PENDING 0x2 1649 #define CIFS_FATTR_NEED_REVAL 0x4 1650 #define CIFS_FATTR_INO_COLLISION 0x8 1651 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1652 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1653 1654 struct cifs_fattr { 1655 u32 cf_flags; 1656 u32 cf_cifsattrs; 1657 u64 cf_uniqueid; 1658 u64 cf_eof; 1659 u64 cf_bytes; 1660 u64 cf_createtime; 1661 kuid_t cf_uid; 1662 kgid_t cf_gid; 1663 umode_t cf_mode; 1664 dev_t cf_rdev; 1665 unsigned int cf_nlink; 1666 unsigned int cf_dtype; 1667 struct timespec64 cf_atime; 1668 struct timespec64 cf_mtime; 1669 struct timespec64 cf_ctime; 1670 }; 1671 free_dfs_info_param(struct dfs_info3_param * param)1672 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1673 { 1674 if (param) { 1675 kfree(param->path_name); 1676 kfree(param->node_name); 1677 } 1678 } 1679 free_dfs_info_array(struct dfs_info3_param * param,int number_of_items)1680 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1681 int number_of_items) 1682 { 1683 int i; 1684 if ((number_of_items == 0) || (param == NULL)) 1685 return; 1686 for (i = 0; i < number_of_items; i++) { 1687 kfree(param[i].path_name); 1688 kfree(param[i].node_name); 1689 } 1690 kfree(param); 1691 } 1692 is_interrupt_error(int error)1693 static inline bool is_interrupt_error(int error) 1694 { 1695 switch (error) { 1696 case -EINTR: 1697 case -ERESTARTSYS: 1698 case -ERESTARTNOHAND: 1699 case -ERESTARTNOINTR: 1700 return true; 1701 } 1702 return false; 1703 } 1704 is_retryable_error(int error)1705 static inline bool is_retryable_error(int error) 1706 { 1707 if (is_interrupt_error(error) || error == -EAGAIN) 1708 return true; 1709 return false; 1710 } 1711 1712 1713 /* cifs_get_writable_file() flags */ 1714 #define FIND_WR_ANY 0 1715 #define FIND_WR_FSUID_ONLY 1 1716 #define FIND_WR_WITH_DELETE 2 1717 1718 #define MID_FREE 0 1719 #define MID_REQUEST_ALLOCATED 1 1720 #define MID_REQUEST_SUBMITTED 2 1721 #define MID_RESPONSE_RECEIVED 4 1722 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1723 #define MID_RESPONSE_MALFORMED 0x10 1724 #define MID_SHUTDOWN 0x20 1725 1726 /* Flags */ 1727 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1728 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1729 1730 /* Types of response buffer returned from SendReceive2 */ 1731 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1732 #define CIFS_SMALL_BUFFER 1 1733 #define CIFS_LARGE_BUFFER 2 1734 #define CIFS_IOVEC 4 /* array of response buffers */ 1735 1736 /* Type of Request to SendReceive2 */ 1737 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1738 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1739 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1740 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1741 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1742 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1743 1744 /* Type of request operation */ 1745 #define CIFS_ECHO_OP 0x080 /* echo request */ 1746 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1747 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1748 #define CIFS_OP_MASK 0x0380 /* mask request type */ 1749 1750 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1751 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1752 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1753 1754 /* Security Flags: indicate type of session setup needed */ 1755 #define CIFSSEC_MAY_SIGN 0x00001 1756 #define CIFSSEC_MAY_NTLM 0x00002 1757 #define CIFSSEC_MAY_NTLMV2 0x00004 1758 #define CIFSSEC_MAY_KRB5 0x00008 1759 #ifdef CONFIG_CIFS_WEAK_PW_HASH 1760 #define CIFSSEC_MAY_LANMAN 0x00010 1761 #define CIFSSEC_MAY_PLNTXT 0x00020 1762 #else 1763 #define CIFSSEC_MAY_LANMAN 0 1764 #define CIFSSEC_MAY_PLNTXT 0 1765 #endif /* weak passwords */ 1766 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1767 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1768 1769 #define CIFSSEC_MUST_SIGN 0x01001 1770 /* note that only one of the following can be set so the 1771 result of setting MUST flags more than once will be to 1772 require use of the stronger protocol */ 1773 #define CIFSSEC_MUST_NTLM 0x02002 1774 #define CIFSSEC_MUST_NTLMV2 0x04004 1775 #define CIFSSEC_MUST_KRB5 0x08008 1776 #ifdef CONFIG_CIFS_WEAK_PW_HASH 1777 #define CIFSSEC_MUST_LANMAN 0x10010 1778 #define CIFSSEC_MUST_PLNTXT 0x20020 1779 #ifdef CONFIG_CIFS_UPCALL 1780 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */ 1781 #else 1782 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */ 1783 #endif /* UPCALL */ 1784 #else /* do not allow weak pw hash */ 1785 #define CIFSSEC_MUST_LANMAN 0 1786 #define CIFSSEC_MUST_PLNTXT 0 1787 #ifdef CONFIG_CIFS_UPCALL 1788 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1789 #else 1790 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1791 #endif /* UPCALL */ 1792 #endif /* WEAK_PW_HASH */ 1793 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1794 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1795 1796 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1797 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2) 1798 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1799 /* 1800 ***************************************************************** 1801 * All constants go here 1802 ***************************************************************** 1803 */ 1804 1805 #define UID_HASH (16) 1806 1807 /* 1808 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1809 * following to be declared. 1810 */ 1811 1812 /**************************************************************************** 1813 * Locking notes. All updates to global variables and lists should be 1814 * protected by spinlocks or semaphores. 1815 * 1816 * Spinlocks 1817 * --------- 1818 * GlobalMid_Lock protects: 1819 * list operations on pending_mid_q and oplockQ 1820 * updates to XID counters, multiplex id and SMB sequence numbers 1821 * list operations on global DnotifyReqList 1822 * updates to ses->status 1823 * tcp_ses_lock protects: 1824 * list operations on tcp and SMB session lists 1825 * tcon->open_file_lock protects the list of open files hanging off the tcon 1826 * inode->open_file_lock protects the openFileList hanging off the inode 1827 * cfile->file_info_lock protects counters and fields in cifs file struct 1828 * f_owner.lock protects certain per file struct operations 1829 * mapping->page_lock protects certain per page operations 1830 * 1831 * Note that the cifs_tcon.open_file_lock should be taken before 1832 * not after the cifsInodeInfo.open_file_lock 1833 * 1834 * Semaphores 1835 * ---------- 1836 * sesSem operations on smb session 1837 * tconSem operations on tree connection 1838 * fh_sem file handle reconnection operations 1839 * 1840 ****************************************************************************/ 1841 1842 #ifdef DECLARE_GLOBALS_HERE 1843 #define GLOBAL_EXTERN 1844 #else 1845 #define GLOBAL_EXTERN extern 1846 #endif 1847 1848 /* 1849 * the list of TCP_Server_Info structures, ie each of the sockets 1850 * connecting our client to a distinct server (ip address), is 1851 * chained together by cifs_tcp_ses_list. The list of all our SMB 1852 * sessions (and from that the tree connections) can be found 1853 * by iterating over cifs_tcp_ses_list 1854 */ 1855 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list; 1856 1857 /* 1858 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1859 * tcp session, and the list of tcon's per smb session. It also protects 1860 * the reference counters for the server, smb session, and tcon. Finally, 1861 * changes to the tcon->tidStatus should be done while holding this lock. 1862 * generally the locks should be taken in order tcp_ses_lock before 1863 * tcon->open_file_lock and that before file->file_info_lock since the 1864 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 1865 */ 1866 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock; 1867 1868 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ 1869 /* Outstanding dir notify requests */ 1870 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; 1871 /* DirNotify response queue */ 1872 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; 1873 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ 1874 1875 /* 1876 * Global transaction id (XID) information 1877 */ 1878 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 1879 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 1880 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 1881 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */ 1882 /* on midQ entries */ 1883 /* 1884 * Global counters, updated atomically 1885 */ 1886 GLOBAL_EXTERN atomic_t sesInfoAllocCount; 1887 GLOBAL_EXTERN atomic_t tconInfoAllocCount; 1888 GLOBAL_EXTERN atomic_t tcpSesAllocCount; 1889 GLOBAL_EXTERN atomic_t tcpSesReconnectCount; 1890 GLOBAL_EXTERN atomic_t tconInfoReconnectCount; 1891 1892 /* Various Debug counters */ 1893 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */ 1894 #ifdef CONFIG_CIFS_STATS2 1895 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */ 1896 GLOBAL_EXTERN atomic_t totSmBufAllocCount; 1897 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 1898 #endif 1899 GLOBAL_EXTERN atomic_t smBufAllocCount; 1900 GLOBAL_EXTERN atomic_t midCount; 1901 1902 /* Misc globals */ 1903 extern bool enable_oplocks; /* enable or disable oplocks */ 1904 extern bool lookupCacheEnabled; 1905 extern unsigned int global_secflags; /* if on, session setup sent 1906 with more secure ntlmssp2 challenge/resp */ 1907 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 1908 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 1909 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 1910 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 1911 extern unsigned int cifs_min_small; /* min size of small buf pool */ 1912 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 1913 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 1914 1915 GLOBAL_EXTERN struct rb_root uidtree; 1916 GLOBAL_EXTERN struct rb_root gidtree; 1917 GLOBAL_EXTERN spinlock_t siduidlock; 1918 GLOBAL_EXTERN spinlock_t sidgidlock; 1919 GLOBAL_EXTERN struct rb_root siduidtree; 1920 GLOBAL_EXTERN struct rb_root sidgidtree; 1921 GLOBAL_EXTERN spinlock_t uidsidlock; 1922 GLOBAL_EXTERN spinlock_t gidsidlock; 1923 1924 void cifs_oplock_break(struct work_struct *work); 1925 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 1926 1927 extern const struct slow_work_ops cifs_oplock_break_ops; 1928 extern struct workqueue_struct *cifsiod_wq; 1929 extern struct workqueue_struct *decrypt_wq; 1930 extern struct workqueue_struct *fileinfo_put_wq; 1931 extern struct workqueue_struct *cifsoplockd_wq; 1932 extern __u32 cifs_lock_secret; 1933 1934 extern mempool_t *cifs_mid_poolp; 1935 1936 /* Operations for different SMB versions */ 1937 #define SMB1_VERSION_STRING "1.0" 1938 #define SMB20_VERSION_STRING "2.0" 1939 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 1940 extern struct smb_version_operations smb1_operations; 1941 extern struct smb_version_values smb1_values; 1942 extern struct smb_version_operations smb20_operations; 1943 extern struct smb_version_values smb20_values; 1944 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 1945 #define SMB21_VERSION_STRING "2.1" 1946 extern struct smb_version_operations smb21_operations; 1947 extern struct smb_version_values smb21_values; 1948 #define SMBDEFAULT_VERSION_STRING "default" 1949 extern struct smb_version_values smbdefault_values; 1950 #define SMB3ANY_VERSION_STRING "3" 1951 extern struct smb_version_values smb3any_values; 1952 #define SMB30_VERSION_STRING "3.0" 1953 extern struct smb_version_operations smb30_operations; 1954 extern struct smb_version_values smb30_values; 1955 #define SMB302_VERSION_STRING "3.02" 1956 #define ALT_SMB302_VERSION_STRING "3.0.2" 1957 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 1958 extern struct smb_version_values smb302_values; 1959 #define SMB311_VERSION_STRING "3.1.1" 1960 #define ALT_SMB311_VERSION_STRING "3.11" 1961 extern struct smb_version_operations smb311_operations; 1962 extern struct smb_version_values smb311_values; 1963 cifs_get_num_sgs(const struct smb_rqst * rqst,int num_rqst,const u8 * sig)1964 static inline unsigned int cifs_get_num_sgs(const struct smb_rqst *rqst, 1965 int num_rqst, 1966 const u8 *sig) 1967 { 1968 unsigned int len, skip; 1969 unsigned int nents = 0; 1970 unsigned long addr; 1971 int i, j; 1972 1973 /* Assumes the first rqst has a transform header as the first iov. 1974 * I.e. 1975 * rqst[0].rq_iov[0] is transform header 1976 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 1977 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 1978 */ 1979 for (i = 0; i < num_rqst; i++) { 1980 /* 1981 * The first rqst has a transform header where the 1982 * first 20 bytes are not part of the encrypted blob. 1983 */ 1984 for (j = 0; j < rqst[i].rq_nvec; j++) { 1985 struct kvec *iov = &rqst[i].rq_iov[j]; 1986 1987 skip = (i == 0) && (j == 0) ? 20 : 0; 1988 addr = (unsigned long)iov->iov_base + skip; 1989 if (unlikely(is_vmalloc_addr((void *)addr))) { 1990 len = iov->iov_len - skip; 1991 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 1992 PAGE_SIZE); 1993 } else { 1994 nents++; 1995 } 1996 } 1997 nents += rqst[i].rq_npages; 1998 } 1999 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2000 return nents; 2001 } 2002 2003 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2004 * stack object as buf. 2005 */ cifs_sg_set_buf(struct scatterlist * sg,const void * buf,unsigned int buflen)2006 static inline struct scatterlist *cifs_sg_set_buf(struct scatterlist *sg, 2007 const void *buf, 2008 unsigned int buflen) 2009 { 2010 unsigned long addr = (unsigned long)buf; 2011 unsigned int off = offset_in_page(addr); 2012 2013 addr &= PAGE_MASK; 2014 if (unlikely(is_vmalloc_addr((void *)addr))) { 2015 do { 2016 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2017 2018 sg_set_page(sg++, vmalloc_to_page((void *)addr), len, off); 2019 2020 off = 0; 2021 addr += PAGE_SIZE; 2022 buflen -= len; 2023 } while (buflen); 2024 } else { 2025 sg_set_page(sg++, virt_to_page(addr), buflen, off); 2026 } 2027 return sg; 2028 } 2029 2030 #endif /* _CIFS_GLOB_H */ 2031