1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 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 */ 9 #ifndef _CIFS_GLOB_H 10 #define _CIFS_GLOB_H 11 12 #include <linux/in.h> 13 #include <linux/in6.h> 14 #include <linux/inet.h> 15 #include <linux/slab.h> 16 #include <linux/scatterlist.h> 17 #include <linux/mm.h> 18 #include <linux/mempool.h> 19 #include <linux/workqueue.h> 20 #include <linux/utsname.h> 21 #include <linux/sched/mm.h> 22 #include <linux/netfs.h> 23 #include "cifs_fs_sb.h" 24 #include "cifsacl.h" 25 #include <crypto/internal/hash.h> 26 #include <uapi/linux/cifs/cifs_mount.h> 27 #include "../common/smb2pdu.h" 28 #include "smb2pdu.h" 29 #include <linux/filelock.h> 30 31 #define SMB_PATH_MAX 260 32 #define CIFS_PORT 445 33 #define RFC1001_PORT 139 34 35 /* 36 * The sizes of various internal tables and strings 37 */ 38 #define MAX_UID_INFO 16 39 #define MAX_SES_INFO 2 40 #define MAX_TCON_INFO 4 41 42 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) 43 44 #define CIFS_MIN_RCV_POOL 4 45 46 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ 47 /* 48 * default attribute cache timeout (jiffies) 49 */ 50 #define CIFS_DEF_ACTIMEO (1 * HZ) 51 52 /* 53 * max sleep time before retry to server 54 */ 55 #define CIFS_MAX_SLEEP 2000 56 57 /* 58 * max attribute cache timeout (jiffies) - 2^30 59 */ 60 #define CIFS_MAX_ACTIMEO (1 << 30) 61 62 /* 63 * Max persistent and resilient handle timeout (milliseconds). 64 * Windows durable max was 960000 (16 minutes) 65 */ 66 #define SMB3_MAX_HANDLE_TIMEOUT 960000 67 68 /* 69 * MAX_REQ is the maximum number of requests that WE will send 70 * on one socket concurrently. 71 */ 72 #define CIFS_MAX_REQ 32767 73 74 #define RFC1001_NAME_LEN 15 75 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 76 77 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 78 #define SERVER_NAME_LENGTH 80 79 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 80 81 /* echo interval in seconds */ 82 #define SMB_ECHO_INTERVAL_MIN 1 83 #define SMB_ECHO_INTERVAL_MAX 600 84 #define SMB_ECHO_INTERVAL_DEFAULT 60 85 86 /* smb multichannel query server interfaces interval in seconds */ 87 #define SMB_INTERFACE_POLL_INTERVAL 600 88 89 /* maximum number of PDUs in one compound */ 90 #define MAX_COMPOUND 7 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 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ 111 112 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) 113 114 /* 115 * CIFS vfs client Status information (based on what we know.) 116 */ 117 118 /* associated with each connection */ 119 enum statusEnum { 120 CifsNew = 0, 121 CifsGood, 122 CifsExiting, 123 CifsNeedReconnect, 124 CifsNeedNegotiate, 125 CifsInNegotiate, 126 }; 127 128 /* associated with each smb session */ 129 enum ses_status_enum { 130 SES_NEW = 0, 131 SES_GOOD, 132 SES_EXITING, 133 SES_NEED_RECON, 134 SES_IN_SETUP 135 }; 136 137 /* associated with each tree connection to the server */ 138 enum tid_status_enum { 139 TID_NEW = 0, 140 TID_GOOD, 141 TID_EXITING, 142 TID_NEED_RECON, 143 TID_NEED_TCON, 144 TID_IN_TCON, 145 TID_NEED_FILES_INVALIDATE, /* currently unused */ 146 TID_IN_FILES_INVALIDATE 147 }; 148 149 enum securityEnum { 150 Unspecified = 0, /* not specified */ 151 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 152 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 153 Kerberos, /* Kerberos via SPNEGO */ 154 IAKerb, /* Kerberos proxy */ 155 }; 156 157 enum upcall_target_enum { 158 UPTARGET_UNSPECIFIED, /* not specified, defaults to app */ 159 UPTARGET_MOUNT, /* upcall to the mount namespace */ 160 UPTARGET_APP, /* upcall to the application namespace which did the mount */ 161 }; 162 163 enum cifs_reparse_type { 164 CIFS_REPARSE_TYPE_NONE, 165 CIFS_REPARSE_TYPE_NFS, 166 CIFS_REPARSE_TYPE_WSL, 167 CIFS_REPARSE_TYPE_DEFAULT = CIFS_REPARSE_TYPE_NFS, 168 }; 169 170 static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type) 171 { 172 switch (type) { 173 case CIFS_REPARSE_TYPE_NONE: 174 return "none"; 175 case CIFS_REPARSE_TYPE_NFS: 176 return "nfs"; 177 case CIFS_REPARSE_TYPE_WSL: 178 return "wsl"; 179 default: 180 return "unknown"; 181 } 182 } 183 184 enum cifs_symlink_type { 185 CIFS_SYMLINK_TYPE_DEFAULT, 186 CIFS_SYMLINK_TYPE_NONE, 187 CIFS_SYMLINK_TYPE_NATIVE, 188 CIFS_SYMLINK_TYPE_UNIX, 189 CIFS_SYMLINK_TYPE_MFSYMLINKS, 190 CIFS_SYMLINK_TYPE_SFU, 191 CIFS_SYMLINK_TYPE_NFS, 192 CIFS_SYMLINK_TYPE_WSL, 193 }; 194 195 static inline const char *cifs_symlink_type_str(enum cifs_symlink_type type) 196 { 197 switch (type) { 198 case CIFS_SYMLINK_TYPE_NONE: 199 return "none"; 200 case CIFS_SYMLINK_TYPE_NATIVE: 201 return "native"; 202 case CIFS_SYMLINK_TYPE_UNIX: 203 return "unix"; 204 case CIFS_SYMLINK_TYPE_MFSYMLINKS: 205 return "mfsymlinks"; 206 case CIFS_SYMLINK_TYPE_SFU: 207 return "sfu"; 208 case CIFS_SYMLINK_TYPE_NFS: 209 return "nfs"; 210 case CIFS_SYMLINK_TYPE_WSL: 211 return "wsl"; 212 default: 213 return "unknown"; 214 } 215 } 216 217 struct session_key { 218 unsigned int len; 219 char *response; 220 }; 221 222 /* crypto hashing related structure/fields, not specific to a sec mech */ 223 struct cifs_secmech { 224 struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ 225 struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ 226 struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ 227 struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ 228 229 struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ 230 struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ 231 }; 232 233 /* per smb session structure/fields */ 234 struct ntlmssp_auth { 235 bool sesskey_per_smbsess; /* whether session key is per smb session */ 236 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 237 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 238 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 239 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 240 }; 241 242 struct cifs_cred { 243 int uid; 244 int gid; 245 int mode; 246 int cecount; 247 struct smb_sid osid; 248 struct smb_sid gsid; 249 struct cifs_ntace *ntaces; 250 struct smb_ace *aces; 251 }; 252 253 struct cifs_open_info_data { 254 bool adjust_tz; 255 bool reparse_point; 256 struct { 257 /* ioctl response buffer */ 258 struct { 259 int buftype; 260 struct kvec iov; 261 } io; 262 __u32 tag; 263 struct reparse_data_buffer *buf; 264 } reparse; 265 struct { 266 __u8 eas[SMB2_WSL_MAX_QUERY_EA_RESP_SIZE]; 267 unsigned int eas_len; 268 } wsl; 269 char *symlink_target; 270 struct smb_sid posix_owner; 271 struct smb_sid posix_group; 272 union { 273 struct smb2_file_all_info fi; 274 struct smb311_posix_qinfo posix_fi; 275 }; 276 }; 277 278 /* 279 ***************************************************************** 280 * Except the CIFS PDUs themselves all the 281 * globally interesting structs should go here 282 ***************************************************************** 283 */ 284 285 /* 286 * A smb_rqst represents a complete request to be issued to a server. It's 287 * formed by a kvec array, followed by an array of pages. Page data is assumed 288 * to start at the beginning of the first page. 289 */ 290 struct smb_rqst { 291 struct kvec *rq_iov; /* array of kvecs */ 292 unsigned int rq_nvec; /* number of kvecs in array */ 293 struct iov_iter rq_iter; /* Data iterator */ 294 struct folio_queue *rq_buffer; /* Buffer for encryption */ 295 }; 296 297 struct mid_q_entry; 298 struct TCP_Server_Info; 299 struct cifsFileInfo; 300 struct cifs_ses; 301 struct cifs_tcon; 302 struct dfs_info3_param; 303 struct cifs_fattr; 304 struct smb3_fs_context; 305 struct cifs_fid; 306 struct cifs_io_subrequest; 307 struct cifs_io_parms; 308 struct cifs_search_info; 309 struct cifsInodeInfo; 310 struct cifs_open_parms; 311 struct cifs_credits; 312 313 struct smb_version_operations { 314 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 315 struct mid_q_entry *); 316 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 317 /* setup request: allocate mid, sign message */ 318 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 319 struct TCP_Server_Info *, 320 struct smb_rqst *); 321 /* setup async request: allocate mid, sign message */ 322 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 323 struct smb_rqst *); 324 /* check response: verify signature, map error */ 325 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 326 bool); 327 void (*add_credits)(struct TCP_Server_Info *server, 328 struct cifs_credits *credits, 329 const int optype); 330 void (*set_credits)(struct TCP_Server_Info *, const int); 331 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 332 unsigned int (*get_credits)(struct mid_q_entry *); 333 __u64 (*get_next_mid)(struct TCP_Server_Info *); 334 void (*revert_current_mid)(struct TCP_Server_Info *server, 335 const unsigned int val); 336 /* data offset from read response message */ 337 unsigned int (*read_data_offset)(char *); 338 /* 339 * Data length from read response message 340 * When in_remaining is true, the returned data length is in 341 * message field DataRemaining for out-of-band data read (e.g through 342 * Memory Registration RDMA write in SMBD). 343 * Otherwise, the returned data length is in message field DataLength. 344 */ 345 unsigned int (*read_data_length)(char *, bool in_remaining); 346 /* map smb to linux error */ 347 int (*map_error)(char *, bool); 348 /* find mid corresponding to the response message */ 349 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 350 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 351 void (*clear_stats)(struct cifs_tcon *); 352 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 353 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 354 /* verify the message */ 355 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 356 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 357 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 358 void (*downgrade_oplock)(struct TCP_Server_Info *server, 359 struct cifsInodeInfo *cinode, __u32 oplock, 360 __u16 epoch, bool *purge_cache); 361 /* process transaction2 response */ 362 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 363 char *, int); 364 /* check if we need to negotiate */ 365 bool (*need_neg)(struct TCP_Server_Info *); 366 /* negotiate to the server */ 367 int (*negotiate)(const unsigned int xid, 368 struct cifs_ses *ses, 369 struct TCP_Server_Info *server); 370 /* set negotiated write size */ 371 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 372 /* set negotiated read size */ 373 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 374 /* setup smb sessionn */ 375 int (*sess_setup)(const unsigned int, struct cifs_ses *, 376 struct TCP_Server_Info *server, 377 const struct nls_table *); 378 /* close smb session */ 379 int (*logoff)(const unsigned int, struct cifs_ses *); 380 /* connect to a server share */ 381 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 382 struct cifs_tcon *, const struct nls_table *); 383 /* close tree connection */ 384 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 385 /* get DFS referrals */ 386 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 387 const char *, struct dfs_info3_param **, 388 unsigned int *, const struct nls_table *, int); 389 /* informational QFS call */ 390 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 391 struct cifs_sb_info *); 392 /* query for server interfaces */ 393 int (*query_server_interfaces)(const unsigned int, struct cifs_tcon *, 394 bool); 395 /* check if a path is accessible or not */ 396 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 397 struct cifs_sb_info *, const char *); 398 /* query path data from the server */ 399 int (*query_path_info)(const unsigned int xid, 400 struct cifs_tcon *tcon, 401 struct cifs_sb_info *cifs_sb, 402 const char *full_path, 403 struct cifs_open_info_data *data); 404 /* query file data from the server */ 405 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 406 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 407 /* query reparse point to determine which type of special file */ 408 int (*query_reparse_point)(const unsigned int xid, 409 struct cifs_tcon *tcon, 410 struct cifs_sb_info *cifs_sb, 411 const char *full_path, 412 u32 *tag, struct kvec *rsp, 413 int *rsp_buftype); 414 /* get server index number */ 415 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 416 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 417 struct cifs_open_info_data *data); 418 /* set size by path */ 419 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 420 const char *, __u64, struct cifs_sb_info *, bool, 421 struct dentry *); 422 /* set size by file handle */ 423 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 424 struct cifsFileInfo *, __u64, bool); 425 /* set attributes */ 426 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 427 const unsigned int); 428 int (*set_compression)(const unsigned int, struct cifs_tcon *, 429 struct cifsFileInfo *); 430 /* check if we can send an echo or nor */ 431 bool (*can_echo)(struct TCP_Server_Info *); 432 /* send echo request */ 433 int (*echo)(struct TCP_Server_Info *); 434 /* create directory */ 435 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 436 umode_t mode, struct cifs_tcon *tcon, 437 const char *full_path, 438 struct cifs_sb_info *cifs_sb); 439 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 440 struct cifs_tcon *tcon, const char *name, 441 struct cifs_sb_info *sb); 442 /* set info on created directory */ 443 void (*mkdir_setinfo)(struct inode *, const char *, 444 struct cifs_sb_info *, struct cifs_tcon *, 445 const unsigned int); 446 /* remove directory */ 447 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 448 struct cifs_sb_info *); 449 /* unlink file */ 450 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 451 struct cifs_sb_info *, struct dentry *); 452 /* open, rename and delete file */ 453 int (*rename_pending_delete)(const char *, struct dentry *, 454 const unsigned int); 455 /* send rename request */ 456 int (*rename)(const unsigned int xid, 457 struct cifs_tcon *tcon, 458 struct dentry *source_dentry, 459 const char *from_name, const char *to_name, 460 struct cifs_sb_info *cifs_sb); 461 /* send create hardlink request */ 462 int (*create_hardlink)(const unsigned int xid, 463 struct cifs_tcon *tcon, 464 struct dentry *source_dentry, 465 const char *from_name, const char *to_name, 466 struct cifs_sb_info *cifs_sb); 467 /* query symlink target */ 468 int (*query_symlink)(const unsigned int xid, 469 struct cifs_tcon *tcon, 470 struct cifs_sb_info *cifs_sb, 471 const char *full_path, 472 char **target_path); 473 /* open a file for non-posix mounts */ 474 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 475 void *buf); 476 /* set fid protocol-specific info */ 477 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 478 /* close a file */ 479 int (*close)(const unsigned int, struct cifs_tcon *, 480 struct cifs_fid *); 481 /* close a file, returning file attributes and timestamps */ 482 int (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 483 struct cifsFileInfo *pfile_info); 484 /* send a flush request to the server */ 485 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 486 /* async read from the server */ 487 int (*async_readv)(struct cifs_io_subrequest *); 488 /* async write to the server */ 489 void (*async_writev)(struct cifs_io_subrequest *); 490 /* sync read from the server */ 491 int (*sync_read)(const unsigned int, struct cifs_fid *, 492 struct cifs_io_parms *, unsigned int *, char **, 493 int *); 494 /* sync write to the server */ 495 int (*sync_write)(const unsigned int, struct cifs_fid *, 496 struct cifs_io_parms *, unsigned int *, struct kvec *, 497 unsigned long); 498 /* open dir, start readdir */ 499 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 500 const char *, struct cifs_sb_info *, 501 struct cifs_fid *, __u16, 502 struct cifs_search_info *); 503 /* continue readdir */ 504 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 505 struct cifs_fid *, 506 __u16, struct cifs_search_info *srch_inf); 507 /* close dir */ 508 int (*close_dir)(const unsigned int, struct cifs_tcon *, 509 struct cifs_fid *); 510 /* calculate a size of SMB message */ 511 unsigned int (*calc_smb_size)(void *buf); 512 /* check for STATUS_PENDING and process the response if yes */ 513 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 514 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 515 bool (*is_session_expired)(char *); 516 /* send oplock break response */ 517 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 518 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 519 /* query remote filesystem */ 520 int (*queryfs)(const unsigned int, struct cifs_tcon *, 521 const char *, struct cifs_sb_info *, struct kstatfs *); 522 /* send mandatory brlock to the server */ 523 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 524 __u64, __u32, int, int, bool); 525 /* unlock range of mandatory locks */ 526 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 527 const unsigned int); 528 /* push brlocks from the cache to the server */ 529 int (*push_mand_locks)(struct cifsFileInfo *); 530 /* get lease key of the inode */ 531 void (*get_lease_key)(struct inode *, struct cifs_fid *); 532 /* set lease key of the inode */ 533 void (*set_lease_key)(struct inode *, struct cifs_fid *); 534 /* generate new lease key */ 535 void (*new_lease_key)(struct cifs_fid *); 536 int (*generate_signingkey)(struct cifs_ses *ses, 537 struct TCP_Server_Info *server); 538 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 539 bool allocate_crypto); 540 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 541 struct cifsFileInfo *src_file); 542 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 543 struct cifsFileInfo *src_file, void __user *); 544 int (*notify)(const unsigned int xid, struct file *pfile, 545 void __user *pbuf, bool return_changes); 546 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 547 struct cifs_sb_info *, const unsigned char *, 548 char *, unsigned int *); 549 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 550 struct cifs_sb_info *, const unsigned char *, 551 char *, unsigned int *); 552 /* if we can do cache read operations */ 553 bool (*is_read_op)(__u32); 554 /* set oplock level for the inode */ 555 void (*set_oplock_level)(struct cifsInodeInfo *cinode, __u32 oplock, __u16 epoch, 556 bool *purge_cache); 557 /* create lease context buffer for CREATE request */ 558 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 559 /* parse lease context buffer and return oplock/epoch info */ 560 __u8 (*parse_lease_buf)(void *buf, __u16 *epoch, char *lkey); 561 ssize_t (*copychunk_range)(const unsigned int, 562 struct cifsFileInfo *src_file, 563 struct cifsFileInfo *target_file, 564 u64 src_off, u64 len, u64 dest_off); 565 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 566 struct cifsFileInfo *target_file, u64 src_off, u64 len, 567 u64 dest_off); 568 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 569 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 570 const unsigned char *, const unsigned char *, char *, 571 size_t, struct cifs_sb_info *); 572 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 573 const char *, const void *, const __u16, 574 const struct nls_table *, struct cifs_sb_info *); 575 struct smb_ntsd * (*get_acl)(struct cifs_sb_info *cifssb, struct inode *ino, 576 const char *patch, u32 *plen, u32 info); 577 struct smb_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *cifssmb, 578 const struct cifs_fid *pfid, u32 *plen, u32 info); 579 int (*set_acl)(struct smb_ntsd *pntsd, __u32 len, struct inode *ino, const char *path, 580 int flag); 581 /* writepages retry size */ 582 unsigned int (*wp_retry_size)(struct inode *); 583 /* get mtu credits */ 584 int (*wait_mtu_credits)(struct TCP_Server_Info *, size_t, 585 size_t *, struct cifs_credits *); 586 /* adjust previously taken mtu credits to request size */ 587 int (*adjust_credits)(struct TCP_Server_Info *server, 588 struct cifs_io_subrequest *subreq, 589 unsigned int /*enum smb3_rw_credits_trace*/ trace); 590 /* check if we need to issue closedir */ 591 bool (*dir_needs_close)(struct cifsFileInfo *); 592 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 593 loff_t); 594 /* init transform (compress/encrypt) request */ 595 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 596 struct smb_rqst *, struct smb_rqst *); 597 int (*is_transform_hdr)(void *buf); 598 int (*receive_transform)(struct TCP_Server_Info *, 599 struct mid_q_entry **, char **, int *); 600 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 601 enum securityEnum); 602 int (*next_header)(struct TCP_Server_Info *server, char *buf, 603 unsigned int *noff); 604 /* ioctl passthrough for query_info */ 605 int (*ioctl_query_info)(const unsigned int xid, 606 struct cifs_tcon *tcon, 607 struct cifs_sb_info *cifs_sb, 608 __le16 *path, int is_dir, 609 unsigned long p); 610 /* make unix special files (block, char, fifo, socket) */ 611 int (*make_node)(unsigned int xid, 612 struct inode *inode, 613 struct dentry *dentry, 614 struct cifs_tcon *tcon, 615 const char *full_path, 616 umode_t mode, 617 dev_t device_number); 618 /* version specific fiemap implementation */ 619 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 620 struct fiemap_extent_info *, u64, u64); 621 /* version specific llseek implementation */ 622 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 623 /* Check for STATUS_IO_TIMEOUT */ 624 bool (*is_status_io_timeout)(char *buf); 625 /* Check for STATUS_NETWORK_NAME_DELETED */ 626 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 627 int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, 628 const char *full_path, 629 struct kvec *rsp_iov, 630 struct cifs_open_info_data *data); 631 int (*create_reparse_symlink)(const unsigned int xid, 632 struct inode *inode, 633 struct dentry *dentry, 634 struct cifs_tcon *tcon, 635 const char *full_path, 636 const char *symname); 637 }; 638 639 struct smb_version_values { 640 char *version_string; 641 __u16 protocol_id; 642 __u32 req_capabilities; 643 __u32 large_lock_type; 644 __u32 exclusive_lock_type; 645 __u32 shared_lock_type; 646 __u32 unlock_lock_type; 647 size_t header_preamble_size; 648 size_t header_size; 649 size_t max_header_size; 650 size_t read_rsp_size; 651 __le16 lock_cmd; 652 unsigned int cap_unix; 653 unsigned int cap_nt_find; 654 unsigned int cap_large_files; 655 __u16 signing_enabled; 656 __u16 signing_required; 657 size_t create_lease_size; 658 }; 659 660 #define HEADER_SIZE(server) (server->vals->header_size) 661 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 662 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 663 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 664 665 /** 666 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 667 * trying to reuse existing superblock for a new mount 668 */ 669 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 670 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 671 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 672 CIFS_MOUNT_MAP_SFM_CHR | \ 673 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 674 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 675 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 676 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 677 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 678 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 679 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 680 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 681 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 682 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 683 684 /** 685 * Generic VFS superblock mount flags (s_flags) to consider when 686 * trying to reuse existing superblock for a new mount 687 */ 688 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 689 SB_NODEV | SB_SYNCHRONOUS) 690 691 struct cifs_mnt_data { 692 struct cifs_sb_info *cifs_sb; 693 struct smb3_fs_context *ctx; 694 int flags; 695 }; 696 697 static inline unsigned int 698 get_rfc1002_length(void *buf) 699 { 700 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 701 } 702 703 static inline void 704 inc_rfc1001_len(void *buf, int count) 705 { 706 be32_add_cpu((__be32 *)buf, count); 707 } 708 709 struct TCP_Server_Info { 710 struct list_head tcp_ses_list; 711 struct list_head smb_ses_list; 712 spinlock_t srv_lock; /* protect anything here that is not protected */ 713 __u64 conn_id; /* connection identifier (useful for debugging) */ 714 int srv_count; /* reference counter */ 715 /* 15 character server name + 0x20 16th byte indicating type = srv */ 716 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 717 struct smb_version_operations *ops; 718 struct smb_version_values *vals; 719 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 720 enum statusEnum tcpStatus; /* what we think the status is */ 721 char *hostname; /* hostname portion of UNC string */ 722 struct socket *ssocket; 723 struct sockaddr_storage dstaddr; 724 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 725 #ifdef CONFIG_NET_NS 726 struct net *net; 727 #endif 728 wait_queue_head_t response_q; 729 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 730 spinlock_t mid_lock; /* protect mid queue and it's entries */ 731 struct list_head pending_mid_q; 732 bool noblocksnd; /* use blocking sendmsg */ 733 bool noautotune; /* do not autotune send buf sizes */ 734 bool nosharesock; 735 bool tcp_nodelay; 736 bool terminate; 737 unsigned int credits; /* send no more requests at once */ 738 unsigned int max_credits; /* can override large 32000 default at mnt */ 739 unsigned int in_flight; /* number of requests on the wire to server */ 740 unsigned int max_in_flight; /* max number of requests that were on wire */ 741 spinlock_t req_lock; /* protect the two values above */ 742 struct mutex _srv_mutex; 743 unsigned int nofs_flag; 744 struct task_struct *tsk; 745 char server_GUID[16]; 746 __u16 sec_mode; 747 bool sign; /* is signing enabled on this connection? */ 748 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 749 bool session_estab; /* mark when very first sess is established */ 750 int echo_credits; /* echo reserved slots */ 751 int oplock_credits; /* oplock break reserved slots */ 752 bool echoes:1; /* enable echoes */ 753 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 754 u16 dialect; /* dialect index that server chose */ 755 bool oplocks:1; /* enable oplocks */ 756 unsigned int maxReq; /* Clients should submit no more */ 757 /* than maxReq distinct unanswered SMBs to the server when using */ 758 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 759 unsigned int maxBuf; /* maxBuf specifies the maximum */ 760 /* message size the server can send or receive for non-raw SMBs */ 761 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 762 /* when socket is setup (and during reconnect) before NegProt sent */ 763 unsigned int max_rw; /* maxRw specifies the maximum */ 764 /* message size the server can send or receive for */ 765 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 766 unsigned int capabilities; /* selective disabling of caps by smb sess */ 767 int timeAdj; /* Adjust for difference in server time zone in sec */ 768 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 769 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 770 /* 16th byte of RFC1001 workstation name is always null */ 771 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 772 __u32 sequence_number; /* for signing, protected by srv_mutex */ 773 __u32 reconnect_instance; /* incremented on each reconnect */ 774 struct session_key session_key; 775 unsigned long lstrp; /* when we got last response from this server */ 776 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 777 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 778 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 779 char negflavor; /* NEGOTIATE response flavor */ 780 /* extended security flavors that server supports */ 781 bool sec_ntlmssp; /* supports NTLMSSP */ 782 bool sec_kerberosu2u; /* supports U2U Kerberos */ 783 bool sec_kerberos; /* supports plain Kerberos */ 784 bool sec_mskerberos; /* supports legacy MS Kerberos */ 785 bool sec_iakerb; /* supports pass-through auth for Kerberos (krb5 proxy) */ 786 bool large_buf; /* is current buffer large? */ 787 /* use SMBD connection instead of socket */ 788 bool rdma; 789 /* point to the SMBD connection if RDMA is used instead of socket */ 790 struct smbd_connection *smbd_conn; 791 struct delayed_work echo; /* echo ping workqueue job */ 792 char *smallbuf; /* pointer to current "small" buffer */ 793 char *bigbuf; /* pointer to current "big" buffer */ 794 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 795 unsigned int pdu_size; 796 unsigned int total_read; /* total amount of data read in this pass */ 797 atomic_t in_send; /* requests trying to send */ 798 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 799 #ifdef CONFIG_CIFS_STATS2 800 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 801 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 802 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 803 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 804 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 805 #endif /* STATS2 */ 806 unsigned int max_read; 807 unsigned int max_write; 808 unsigned int min_offload; 809 unsigned int retrans; 810 struct { 811 bool requested; /* "compress" mount option set*/ 812 bool enabled; /* actually negotiated with server */ 813 __le16 alg; /* preferred alg negotiated with server */ 814 } compression; 815 __u16 signing_algorithm; 816 __le16 cipher_type; 817 /* save initial negprot hash */ 818 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 819 bool signing_negotiated; /* true if valid signing context rcvd from server */ 820 bool posix_ext_supported; 821 struct delayed_work reconnect; /* reconnect workqueue job */ 822 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 823 unsigned long echo_interval; 824 825 /* 826 * Number of targets available for reconnect. The more targets 827 * the more tasks have to wait to let the demultiplex thread 828 * reconnect. 829 */ 830 int nr_targets; 831 bool noblockcnt; /* use non-blocking connect() */ 832 833 /* 834 * If this is a session channel, 835 * primary_server holds the ref-counted 836 * pointer to primary channel connection for the session. 837 */ 838 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 839 struct TCP_Server_Info *primary_server; 840 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 841 842 #ifdef CONFIG_CIFS_SWN_UPCALL 843 bool use_swn_dstaddr; 844 struct sockaddr_storage swn_dstaddr; 845 #endif 846 /* 847 * Canonical DFS referral path used in cifs_reconnect() for failover as 848 * well as in DFS cache refresher. 849 * 850 * format: \\HOST\SHARE[\OPTIONAL PATH] 851 */ 852 char *leaf_fullpath; 853 bool dfs_conn:1; 854 char dns_dom[CIFS_MAX_DOMAINNAME_LEN + 1]; 855 }; 856 857 static inline bool is_smb1(struct TCP_Server_Info *server) 858 { 859 return HEADER_PREAMBLE_SIZE(server) != 0; 860 } 861 862 static inline void cifs_server_lock(struct TCP_Server_Info *server) 863 { 864 unsigned int nofs_flag = memalloc_nofs_save(); 865 866 mutex_lock(&server->_srv_mutex); 867 server->nofs_flag = nofs_flag; 868 } 869 870 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 871 { 872 unsigned int nofs_flag = server->nofs_flag; 873 874 mutex_unlock(&server->_srv_mutex); 875 memalloc_nofs_restore(nofs_flag); 876 } 877 878 struct cifs_credits { 879 unsigned int value; 880 unsigned int instance; 881 unsigned int in_flight_check; 882 unsigned int rreq_debug_id; 883 unsigned int rreq_debug_index; 884 }; 885 886 static inline unsigned int 887 in_flight(struct TCP_Server_Info *server) 888 { 889 unsigned int num; 890 891 spin_lock(&server->req_lock); 892 num = server->in_flight; 893 spin_unlock(&server->req_lock); 894 return num; 895 } 896 897 static inline bool 898 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 899 { 900 int num; 901 902 spin_lock(&server->req_lock); 903 num = *credits; 904 spin_unlock(&server->req_lock); 905 return num >= num_credits; 906 } 907 908 static inline void 909 add_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 910 const int optype) 911 { 912 server->ops->add_credits(server, credits, optype); 913 } 914 915 static inline void 916 add_credits_and_wake_if(struct TCP_Server_Info *server, 917 struct cifs_credits *credits, const int optype) 918 { 919 if (credits->value) { 920 server->ops->add_credits(server, credits, optype); 921 wake_up(&server->request_q); 922 credits->value = 0; 923 } 924 } 925 926 static inline void 927 set_credits(struct TCP_Server_Info *server, const int val) 928 { 929 server->ops->set_credits(server, val); 930 } 931 932 static inline int 933 adjust_credits(struct TCP_Server_Info *server, struct cifs_io_subrequest *subreq, 934 unsigned int /* enum smb3_rw_credits_trace */ trace) 935 { 936 return server->ops->adjust_credits ? 937 server->ops->adjust_credits(server, subreq, trace) : 0; 938 } 939 940 static inline __le64 941 get_next_mid64(struct TCP_Server_Info *server) 942 { 943 return cpu_to_le64(server->ops->get_next_mid(server)); 944 } 945 946 static inline __le16 947 get_next_mid(struct TCP_Server_Info *server) 948 { 949 __u16 mid = server->ops->get_next_mid(server); 950 /* 951 * The value in the SMB header should be little endian for easy 952 * on-the-wire decoding. 953 */ 954 return cpu_to_le16(mid); 955 } 956 957 static inline void 958 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 959 { 960 if (server->ops->revert_current_mid) 961 server->ops->revert_current_mid(server, val); 962 } 963 964 static inline void 965 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 966 const struct smb2_hdr *shdr) 967 { 968 unsigned int num = le16_to_cpu(shdr->CreditCharge); 969 970 return revert_current_mid(server, num > 0 ? num : 1); 971 } 972 973 static inline __u16 974 get_mid(const struct smb_hdr *smb) 975 { 976 return le16_to_cpu(smb->Mid); 977 } 978 979 static inline bool 980 compare_mid(__u16 mid, const struct smb_hdr *smb) 981 { 982 return mid == le16_to_cpu(smb->Mid); 983 } 984 985 /* 986 * When the server supports very large reads and writes via POSIX extensions, 987 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 988 * including the RFC1001 length. 989 * 990 * Note that this might make for "interesting" allocation problems during 991 * writeback however as we have to allocate an array of pointers for the 992 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 993 * 994 * For reads, there is a similar problem as we need to allocate an array 995 * of kvecs to handle the receive, though that should only need to be done 996 * once. 997 */ 998 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 999 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 1000 1001 /* 1002 * When the server doesn't allow large posix writes, only allow a rsize/wsize 1003 * of 2^17-1 minus the size of the call header. That allows for a read or 1004 * write up to the maximum size described by RFC1002. 1005 */ 1006 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 1007 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 1008 1009 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 1010 1011 /* 1012 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 1013 * those values when posix extensions aren't in force. In actuality here, we 1014 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 1015 * to be ok with the extra byte even though Windows doesn't send writes that 1016 * are that large. 1017 * 1018 * Citation: 1019 * 1020 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 1021 */ 1022 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 1023 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 1024 1025 /* 1026 * Macros to allow the TCP_Server_Info->net field and related code to drop out 1027 * when CONFIG_NET_NS isn't set. 1028 */ 1029 1030 #ifdef CONFIG_NET_NS 1031 1032 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 1033 { 1034 return srv->net; 1035 } 1036 1037 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 1038 { 1039 srv->net = net; 1040 } 1041 1042 #else 1043 1044 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 1045 { 1046 return &init_net; 1047 } 1048 1049 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 1050 { 1051 } 1052 1053 #endif 1054 1055 struct cifs_server_iface { 1056 struct list_head iface_head; 1057 struct kref refcount; 1058 size_t speed; 1059 size_t weight_fulfilled; 1060 unsigned int num_channels; 1061 unsigned int rdma_capable : 1; 1062 unsigned int rss_capable : 1; 1063 unsigned int is_active : 1; /* unset if non existent */ 1064 struct sockaddr_storage sockaddr; 1065 }; 1066 1067 /* release iface when last ref is dropped */ 1068 static inline void 1069 release_iface(struct kref *ref) 1070 { 1071 struct cifs_server_iface *iface = container_of(ref, 1072 struct cifs_server_iface, 1073 refcount); 1074 kfree(iface); 1075 } 1076 1077 struct cifs_chan { 1078 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1079 struct TCP_Server_Info *server; 1080 struct cifs_server_iface *iface; /* interface in use */ 1081 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1082 }; 1083 1084 #define CIFS_SES_FLAG_SCALE_CHANNELS (0x1) 1085 1086 /* 1087 * Session structure. One of these for each uid session with a particular host 1088 */ 1089 struct cifs_ses { 1090 struct list_head smb_ses_list; 1091 struct list_head rlist; /* reconnect list */ 1092 struct list_head tcon_list; 1093 struct list_head dlist; /* dfs list */ 1094 struct cifs_tcon *tcon_ipc; 1095 spinlock_t ses_lock; /* protect anything here that is not protected */ 1096 struct mutex session_mutex; 1097 struct TCP_Server_Info *server; /* pointer to server info */ 1098 int ses_count; /* reference counter */ 1099 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1100 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1101 char *serverOS; /* name of operating system underlying server */ 1102 char *serverNOS; /* name of network operating system of server */ 1103 char *serverDomain; /* security realm of server */ 1104 __u64 Suid; /* remote smb uid */ 1105 kuid_t linux_uid; /* overriding owner of files on the mount */ 1106 kuid_t cred_uid; /* owner of credentials */ 1107 unsigned int capabilities; 1108 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1109 char *user_name; /* must not be null except during init of sess 1110 and after mount option parsing we fill it */ 1111 char *domainName; 1112 char *password; 1113 char *password2; /* When key rotation used, new password may be set before it expires */ 1114 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1115 struct session_key auth_key; 1116 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1117 enum securityEnum sectype; /* what security flavor was specified? */ 1118 enum upcall_target_enum upcall_target; /* what upcall target was specified? */ 1119 bool sign; /* is signing required? */ 1120 bool domainAuto:1; 1121 bool expired_pwd; /* track if access denied or expired pwd so can know if need to update */ 1122 unsigned int flags; 1123 __u16 session_flags; 1124 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1125 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1126 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1127 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1128 1129 /* 1130 * Network interfaces available on the server this session is 1131 * connected to. 1132 * 1133 * Other channels can be opened by connecting and binding this 1134 * session to interfaces from this list. 1135 * 1136 * iface_lock should be taken when accessing any of these fields 1137 */ 1138 spinlock_t iface_lock; 1139 /* ========= begin: protected by iface_lock ======== */ 1140 struct list_head iface_list; 1141 size_t iface_count; 1142 unsigned long iface_last_update; /* jiffies */ 1143 /* ========= end: protected by iface_lock ======== */ 1144 1145 spinlock_t chan_lock; 1146 /* ========= begin: protected by chan_lock ======== */ 1147 #define CIFS_MAX_CHANNELS 16 1148 #define CIFS_INVAL_CHAN_INDEX (-1) 1149 #define CIFS_ALL_CHANNELS_SET(ses) \ 1150 ((1UL << (ses)->chan_count) - 1) 1151 #define CIFS_ALL_CHANS_GOOD(ses) \ 1152 (!(ses)->chans_need_reconnect) 1153 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1154 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1155 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1156 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1157 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1158 test_bit((index), &(ses)->chans_need_reconnect) 1159 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1160 ((ses)->chans[(index)].in_reconnect) 1161 1162 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1163 size_t chan_count; 1164 size_t chan_max; 1165 atomic_t chan_seq; /* round robin state */ 1166 1167 /* 1168 * chans_need_reconnect is a bitmap indicating which of the channels 1169 * under this smb session needs to be reconnected. 1170 * If not multichannel session, only one bit will be used. 1171 * 1172 * We will ask for sess and tcon reconnection only if all the 1173 * channels are marked for needing reconnection. This will 1174 * enable the sessions on top to continue to live till any 1175 * of the channels below are active. 1176 */ 1177 unsigned long chans_need_reconnect; 1178 /* ========= end: protected by chan_lock ======== */ 1179 struct cifs_ses *dfs_root_ses; 1180 struct nls_table *local_nls; 1181 char *dns_dom; /* FQDN of the domain */ 1182 }; 1183 1184 static inline bool 1185 cap_unix(struct cifs_ses *ses) 1186 { 1187 return ses->server->vals->cap_unix & ses->capabilities; 1188 } 1189 1190 /* 1191 * common struct for holding inode info when searching for or updating an 1192 * inode with new info 1193 */ 1194 1195 #define CIFS_FATTR_JUNCTION 0x1 1196 #define CIFS_FATTR_DELETE_PENDING 0x2 1197 #define CIFS_FATTR_NEED_REVAL 0x4 1198 #define CIFS_FATTR_INO_COLLISION 0x8 1199 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1200 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1201 1202 struct cifs_fattr { 1203 u32 cf_flags; 1204 u32 cf_cifsattrs; 1205 u64 cf_uniqueid; 1206 u64 cf_eof; 1207 u64 cf_bytes; 1208 u64 cf_createtime; 1209 kuid_t cf_uid; 1210 kgid_t cf_gid; 1211 umode_t cf_mode; 1212 dev_t cf_rdev; 1213 unsigned int cf_nlink; 1214 unsigned int cf_dtype; 1215 struct timespec64 cf_atime; 1216 struct timespec64 cf_mtime; 1217 struct timespec64 cf_ctime; 1218 u32 cf_cifstag; 1219 char *cf_symlink_target; 1220 }; 1221 1222 /* 1223 * there is one of these for each connection to a resource on a particular 1224 * session 1225 */ 1226 struct cifs_tcon { 1227 struct list_head tcon_list; 1228 int debug_id; /* Debugging for tracing */ 1229 int tc_count; 1230 struct list_head rlist; /* reconnect list */ 1231 spinlock_t tc_lock; /* protect anything here that is not protected */ 1232 atomic_t num_local_opens; /* num of all opens including disconnected */ 1233 atomic_t num_remote_opens; /* num of all network opens on server */ 1234 struct list_head openFileList; 1235 spinlock_t open_file_lock; /* protects list above */ 1236 struct cifs_ses *ses; /* pointer to session associated with */ 1237 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1238 char *nativeFileSystem; 1239 char *password; /* for share-level security */ 1240 __u32 tid; /* The 4 byte tree id */ 1241 __u16 Flags; /* optional support bits */ 1242 enum tid_status_enum status; 1243 atomic_t num_smbs_sent; 1244 union { 1245 struct { 1246 atomic_t num_writes; 1247 atomic_t num_reads; 1248 atomic_t num_flushes; 1249 atomic_t num_oplock_brks; 1250 atomic_t num_opens; 1251 atomic_t num_closes; 1252 atomic_t num_deletes; 1253 atomic_t num_mkdirs; 1254 atomic_t num_posixopens; 1255 atomic_t num_posixmkdirs; 1256 atomic_t num_rmdirs; 1257 atomic_t num_renames; 1258 atomic_t num_t2renames; 1259 atomic_t num_ffirst; 1260 atomic_t num_fnext; 1261 atomic_t num_fclose; 1262 atomic_t num_hardlinks; 1263 atomic_t num_symlinks; 1264 atomic_t num_locks; 1265 atomic_t num_acl_get; 1266 atomic_t num_acl_set; 1267 } cifs_stats; 1268 struct { 1269 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1270 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1271 } smb2_stats; 1272 } stats; 1273 __u64 bytes_read; 1274 __u64 bytes_written; 1275 spinlock_t stat_lock; /* protects the two fields above */ 1276 time64_t stats_from_time; 1277 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1278 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1279 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1280 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1281 bool pipe:1; /* set if connection to pipe share */ 1282 bool print:1; /* set if connection to printer share */ 1283 bool retry:1; 1284 bool nocase:1; 1285 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1286 bool nodelete:1; 1287 bool seal:1; /* transport encryption for this mounted share */ 1288 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1289 for this mount even if server would support */ 1290 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1291 bool local_lease:1; /* check leases (only) on local system not remote */ 1292 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1293 bool broken_sparse_sup; /* if server or share does not support sparse */ 1294 bool need_reconnect:1; /* connection reset, tid now invalid */ 1295 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1296 bool use_resilient:1; /* use resilient instead of durable handles */ 1297 bool use_persistent:1; /* use persistent instead of durable handles */ 1298 bool no_lease:1; /* Do not request leases on files or directories */ 1299 bool use_witness:1; /* use witness protocol */ 1300 __le32 capabilities; 1301 __u32 share_flags; 1302 __u32 maximal_access; 1303 __u32 vol_serial_number; 1304 __le64 vol_create_time; 1305 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1306 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1307 __u32 ss_flags; /* sector size flags */ 1308 __u32 perf_sector_size; /* best sector size for perf */ 1309 __u32 max_chunks; 1310 __u32 max_bytes_chunk; 1311 __u32 max_bytes_copy; 1312 __u32 max_cached_dirs; 1313 #ifdef CONFIG_CIFS_FSCACHE 1314 u64 resource_id; /* server resource id */ 1315 bool fscache_acquired; /* T if we've tried acquiring a cookie */ 1316 struct fscache_volume *fscache; /* cookie for share */ 1317 struct mutex fscache_lock; /* Prevent regetting a cookie */ 1318 #endif 1319 struct list_head pending_opens; /* list of incomplete opens */ 1320 struct cached_fids *cfids; 1321 /* BB add field for back pointer to sb struct(s)? */ 1322 #ifdef CONFIG_CIFS_DFS_UPCALL 1323 struct delayed_work dfs_cache_work; 1324 struct list_head dfs_ses_list; 1325 #endif 1326 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1327 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1328 }; 1329 1330 /* 1331 * This is a refcounted and timestamped container for a tcon pointer. The 1332 * container holds a tcon reference. It is considered safe to free one of 1333 * these when the tl_count goes to 0. The tl_time is the time of the last 1334 * "get" on the container. 1335 */ 1336 struct tcon_link { 1337 struct rb_node tl_rbnode; 1338 kuid_t tl_uid; 1339 unsigned long tl_flags; 1340 #define TCON_LINK_MASTER 0 1341 #define TCON_LINK_PENDING 1 1342 #define TCON_LINK_IN_TREE 2 1343 unsigned long tl_time; 1344 atomic_t tl_count; 1345 struct cifs_tcon *tl_tcon; 1346 }; 1347 1348 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1349 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1350 1351 static inline struct cifs_tcon * 1352 tlink_tcon(struct tcon_link *tlink) 1353 { 1354 return tlink->tl_tcon; 1355 } 1356 1357 static inline struct tcon_link * 1358 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1359 { 1360 return cifs_sb->master_tlink; 1361 } 1362 1363 extern void cifs_put_tlink(struct tcon_link *tlink); 1364 1365 static inline struct tcon_link * 1366 cifs_get_tlink(struct tcon_link *tlink) 1367 { 1368 if (tlink && !IS_ERR(tlink)) 1369 atomic_inc(&tlink->tl_count); 1370 return tlink; 1371 } 1372 1373 /* This function is always expected to succeed */ 1374 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1375 1376 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1377 1378 struct cifs_pending_open { 1379 struct list_head olist; 1380 struct tcon_link *tlink; 1381 __u8 lease_key[16]; 1382 __u32 oplock; 1383 }; 1384 1385 struct cifs_deferred_close { 1386 struct list_head dlist; 1387 struct tcon_link *tlink; 1388 __u16 netfid; 1389 __u64 persistent_fid; 1390 __u64 volatile_fid; 1391 }; 1392 1393 /* 1394 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1395 * This is used to track byte stream locks on the file 1396 */ 1397 struct cifsLockInfo { 1398 struct list_head llist; /* pointer to next cifsLockInfo */ 1399 struct list_head blist; /* pointer to locks blocked on this */ 1400 wait_queue_head_t block_q; 1401 __u64 offset; 1402 __u64 length; 1403 __u32 pid; 1404 __u16 type; 1405 __u16 flags; 1406 }; 1407 1408 /* 1409 * One of these for each open instance of a file 1410 */ 1411 struct cifs_search_info { 1412 loff_t index_of_last_entry; 1413 __u16 entries_in_buffer; 1414 __u16 info_level; 1415 __u32 resume_key; 1416 char *ntwrk_buf_start; 1417 char *srch_entries_start; 1418 char *last_entry; 1419 const char *presume_name; 1420 unsigned int resume_name_len; 1421 bool endOfSearch:1; 1422 bool emptyDir:1; 1423 bool unicode:1; 1424 bool smallBuf:1; /* so we know which buf_release function to call */ 1425 }; 1426 1427 #define ACL_NO_MODE ((umode_t)(-1)) 1428 struct cifs_open_parms { 1429 struct cifs_tcon *tcon; 1430 struct cifs_sb_info *cifs_sb; 1431 int disposition; 1432 int desired_access; 1433 int create_options; 1434 const char *path; 1435 struct cifs_fid *fid; 1436 umode_t mode; 1437 bool reconnect:1; 1438 bool replay:1; /* indicates that this open is for a replay */ 1439 struct kvec *ea_cctx; 1440 }; 1441 1442 struct cifs_fid { 1443 __u16 netfid; 1444 __u64 persistent_fid; /* persist file id for smb2 */ 1445 __u64 volatile_fid; /* volatile file id for smb2 */ 1446 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1447 __u8 create_guid[16]; 1448 __u32 access; 1449 struct cifs_pending_open *pending_open; 1450 __u16 epoch; 1451 #ifdef CONFIG_CIFS_DEBUG2 1452 __u64 mid; 1453 #endif /* CIFS_DEBUG2 */ 1454 bool purge_cache; 1455 }; 1456 1457 struct cifs_fid_locks { 1458 struct list_head llist; 1459 struct cifsFileInfo *cfile; /* fid that owns locks */ 1460 struct list_head locks; /* locks held by fid above */ 1461 }; 1462 1463 struct cifsFileInfo { 1464 /* following two lists are protected by tcon->open_file_lock */ 1465 struct list_head tlist; /* pointer to next fid owned by tcon */ 1466 struct list_head flist; /* next fid (file instance) for this inode */ 1467 /* lock list below protected by cifsi->lock_sem */ 1468 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1469 kuid_t uid; /* allows finding which FileInfo structure */ 1470 __u32 pid; /* process id who opened file */ 1471 struct cifs_fid fid; /* file id from remote */ 1472 struct list_head rlist; /* reconnect list */ 1473 /* BB add lock scope info here if needed */ 1474 /* lock scope id (0 if none) */ 1475 struct dentry *dentry; 1476 struct tcon_link *tlink; 1477 unsigned int f_flags; 1478 bool invalidHandle:1; /* file closed via session abend */ 1479 bool swapfile:1; 1480 bool oplock_break_cancelled:1; 1481 bool status_file_deleted:1; /* file has been deleted */ 1482 bool offload:1; /* offload final part of _put to a wq */ 1483 __u16 oplock_epoch; /* epoch from the lease break */ 1484 __u32 oplock_level; /* oplock/lease level from the lease break */ 1485 int count; 1486 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1487 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1488 struct cifs_search_info srch_inf; 1489 struct work_struct oplock_break; /* work for oplock breaks */ 1490 struct work_struct put; /* work for the final part of _put */ 1491 struct work_struct serverclose; /* work for serverclose */ 1492 struct delayed_work deferred; 1493 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1494 char *symlink_target; 1495 }; 1496 1497 struct cifs_io_parms { 1498 __u16 netfid; 1499 __u64 persistent_fid; /* persist file id for smb2 */ 1500 __u64 volatile_fid; /* volatile file id for smb2 */ 1501 __u32 pid; 1502 __u64 offset; 1503 unsigned int length; 1504 struct cifs_tcon *tcon; 1505 struct TCP_Server_Info *server; 1506 }; 1507 1508 struct cifs_io_request { 1509 struct netfs_io_request rreq; 1510 struct cifsFileInfo *cfile; 1511 pid_t pid; 1512 }; 1513 1514 /* asynchronous read support */ 1515 struct cifs_io_subrequest { 1516 union { 1517 struct netfs_io_subrequest subreq; 1518 struct netfs_io_request *rreq; 1519 struct cifs_io_request *req; 1520 }; 1521 ssize_t got_bytes; 1522 unsigned int xid; 1523 int result; 1524 bool have_xid; 1525 bool replay; 1526 struct kvec iov[2]; 1527 struct TCP_Server_Info *server; 1528 #ifdef CONFIG_CIFS_SMB_DIRECT 1529 struct smbd_mr *mr; 1530 #endif 1531 struct cifs_credits credits; 1532 }; 1533 1534 /* 1535 * Take a reference on the file private data. Must be called with 1536 * cfile->file_info_lock held. 1537 */ 1538 static inline void 1539 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1540 { 1541 ++cifs_file->count; 1542 } 1543 1544 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1545 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1546 bool offload); 1547 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1548 1549 #define CIFS_CACHE_READ_FLG 1 1550 #define CIFS_CACHE_HANDLE_FLG 2 1551 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1552 #define CIFS_CACHE_WRITE_FLG 4 1553 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1554 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1555 1556 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)) 1557 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1558 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)) 1559 1560 /* 1561 * One of these for each file inode 1562 */ 1563 1564 struct cifsInodeInfo { 1565 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1566 bool can_cache_brlcks; 1567 struct list_head llist; /* locks helb by this inode */ 1568 /* 1569 * NOTE: Some code paths call down_read(lock_sem) twice, so 1570 * we must always use cifs_down_write() instead of down_write() 1571 * for this semaphore to avoid deadlocks. 1572 */ 1573 struct rw_semaphore lock_sem; /* protect the fields above */ 1574 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1575 struct list_head openFileList; 1576 spinlock_t open_file_lock; /* protects openFileList */ 1577 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1578 unsigned int oplock; /* oplock/lease level we have */ 1579 __u16 epoch; /* used to track lease state changes */ 1580 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1581 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1582 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1583 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1584 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1585 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1586 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1587 unsigned long flags; 1588 spinlock_t writers_lock; 1589 unsigned int writers; /* Number of writers on this inode */ 1590 unsigned long time; /* jiffies of last update of inode */ 1591 u64 uniqueid; /* server inode number */ 1592 u64 createtime; /* creation time on server */ 1593 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1594 struct list_head deferred_closes; /* list of deferred closes */ 1595 spinlock_t deferred_lock; /* protection on deferred list */ 1596 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1597 char *symlink_target; 1598 __u32 reparse_tag; 1599 }; 1600 1601 static inline struct cifsInodeInfo * 1602 CIFS_I(struct inode *inode) 1603 { 1604 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1605 } 1606 1607 static inline struct cifs_sb_info * 1608 CIFS_SB(struct super_block *sb) 1609 { 1610 return sb->s_fs_info; 1611 } 1612 1613 static inline struct cifs_sb_info * 1614 CIFS_FILE_SB(struct file *file) 1615 { 1616 return CIFS_SB(file_inode(file)->i_sb); 1617 } 1618 1619 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1620 { 1621 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1622 return '/'; 1623 else 1624 return '\\'; 1625 } 1626 1627 static inline void 1628 convert_delimiter(char *path, char delim) 1629 { 1630 char old_delim, *pos; 1631 1632 if (delim == '/') 1633 old_delim = '\\'; 1634 else 1635 old_delim = '/'; 1636 1637 pos = path; 1638 while ((pos = strchr(pos, old_delim))) 1639 *pos = delim; 1640 } 1641 1642 #define cifs_stats_inc atomic_inc 1643 1644 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1645 unsigned int bytes) 1646 { 1647 if (bytes) { 1648 spin_lock(&tcon->stat_lock); 1649 tcon->bytes_written += bytes; 1650 spin_unlock(&tcon->stat_lock); 1651 } 1652 } 1653 1654 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1655 unsigned int bytes) 1656 { 1657 spin_lock(&tcon->stat_lock); 1658 tcon->bytes_read += bytes; 1659 spin_unlock(&tcon->stat_lock); 1660 } 1661 1662 1663 /* 1664 * This is the prototype for the mid receive function. This function is for 1665 * receiving the rest of the SMB frame, starting with the WordCount (which is 1666 * just after the MID in struct smb_hdr). Note: 1667 * 1668 * - This will be called by cifsd, with no locks held. 1669 * - The mid will still be on the pending_mid_q. 1670 * - mid->resp_buf will point to the current buffer. 1671 * 1672 * Returns zero on a successful receive, or an error. The receive state in 1673 * the TCP_Server_Info will also be updated. 1674 */ 1675 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1676 struct mid_q_entry *mid); 1677 1678 /* 1679 * This is the prototype for the mid callback function. This is called once the 1680 * mid has been received off of the socket. When creating one, take special 1681 * care to avoid deadlocks. Things to bear in mind: 1682 * 1683 * - it will be called by cifsd, with no locks held 1684 * - the mid will be removed from any lists 1685 */ 1686 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1687 1688 /* 1689 * This is the protopyte for mid handle function. This is called once the mid 1690 * has been recognized after decryption of the message. 1691 */ 1692 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1693 struct mid_q_entry *mid); 1694 1695 /* one of these for every pending CIFS request to the server */ 1696 struct mid_q_entry { 1697 struct list_head qhead; /* mids waiting on reply from this server */ 1698 struct kref refcount; 1699 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1700 __u64 mid; /* multiplex id */ 1701 __u16 credits; /* number of credits consumed by this mid */ 1702 __u16 credits_received; /* number of credits from the response */ 1703 __u32 pid; /* process id */ 1704 __u32 sequence_number; /* for CIFS signing */ 1705 unsigned long when_alloc; /* when mid was created */ 1706 #ifdef CONFIG_CIFS_STATS2 1707 unsigned long when_sent; /* time when smb send finished */ 1708 unsigned long when_received; /* when demux complete (taken off wire) */ 1709 #endif 1710 mid_receive_t *receive; /* call receive callback */ 1711 mid_callback_t *callback; /* call completion callback */ 1712 mid_handle_t *handle; /* call handle mid callback */ 1713 void *callback_data; /* general purpose pointer for callback */ 1714 struct task_struct *creator; 1715 void *resp_buf; /* pointer to received SMB header */ 1716 unsigned int resp_buf_size; 1717 int mid_state; /* wish this were enum but can not pass to wait_event */ 1718 unsigned int mid_flags; 1719 __le16 command; /* smb command code */ 1720 unsigned int optype; /* operation type */ 1721 bool large_buf:1; /* if valid response, is pointer to large buf */ 1722 bool multiRsp:1; /* multiple trans2 responses for one request */ 1723 bool multiEnd:1; /* both received */ 1724 bool decrypted:1; /* decrypted entry */ 1725 }; 1726 1727 struct close_cancelled_open { 1728 struct cifs_fid fid; 1729 struct cifs_tcon *tcon; 1730 struct work_struct work; 1731 __u64 mid; 1732 __u16 cmd; 1733 }; 1734 1735 /* Make code in transport.c a little cleaner by moving 1736 update of optional stats into function below */ 1737 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1738 { 1739 atomic_inc(&server->in_send); 1740 } 1741 1742 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1743 { 1744 atomic_dec(&server->in_send); 1745 } 1746 1747 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1748 { 1749 atomic_inc(&server->num_waiters); 1750 } 1751 1752 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1753 { 1754 atomic_dec(&server->num_waiters); 1755 } 1756 1757 #ifdef CONFIG_CIFS_STATS2 1758 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1759 { 1760 mid->when_sent = jiffies; 1761 } 1762 #else 1763 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1764 { 1765 } 1766 #endif 1767 1768 /* for pending dnotify requests */ 1769 struct dir_notify_req { 1770 struct list_head lhead; 1771 __le16 Pid; 1772 __le16 PidHigh; 1773 __u16 Mid; 1774 __u16 Tid; 1775 __u16 Uid; 1776 __u16 netfid; 1777 __u32 filter; /* CompletionFilter (for multishot) */ 1778 int multishot; 1779 struct file *pfile; 1780 }; 1781 1782 struct dfs_info3_param { 1783 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1784 int path_consumed; 1785 int server_type; 1786 int ref_flag; 1787 char *path_name; 1788 char *node_name; 1789 int ttl; 1790 }; 1791 1792 struct file_list { 1793 struct list_head list; 1794 struct cifsFileInfo *cfile; 1795 }; 1796 1797 struct cifs_mount_ctx { 1798 struct cifs_sb_info *cifs_sb; 1799 struct smb3_fs_context *fs_ctx; 1800 unsigned int xid; 1801 struct TCP_Server_Info *server; 1802 struct cifs_ses *ses; 1803 struct cifs_tcon *tcon; 1804 }; 1805 1806 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1807 { 1808 kfree(param->path_name); 1809 kfree(param->node_name); 1810 } 1811 1812 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1813 { 1814 if (param) 1815 __free_dfs_info_param(param); 1816 } 1817 1818 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1819 { 1820 if (param) { 1821 __free_dfs_info_param(param); 1822 memset(param, 0, sizeof(*param)); 1823 } 1824 } 1825 1826 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1827 int number_of_items) 1828 { 1829 int i; 1830 1831 if ((number_of_items == 0) || (param == NULL)) 1832 return; 1833 for (i = 0; i < number_of_items; i++) { 1834 kfree(param[i].path_name); 1835 kfree(param[i].node_name); 1836 } 1837 kfree(param); 1838 } 1839 1840 static inline bool is_interrupt_error(int error) 1841 { 1842 switch (error) { 1843 case -EINTR: 1844 case -ERESTARTSYS: 1845 case -ERESTARTNOHAND: 1846 case -ERESTARTNOINTR: 1847 return true; 1848 } 1849 return false; 1850 } 1851 1852 static inline bool is_retryable_error(int error) 1853 { 1854 if (is_interrupt_error(error) || error == -EAGAIN) 1855 return true; 1856 return false; 1857 } 1858 1859 static inline bool is_replayable_error(int error) 1860 { 1861 if (error == -EAGAIN || error == -ECONNABORTED) 1862 return true; 1863 return false; 1864 } 1865 1866 1867 /* cifs_get_writable_file() flags */ 1868 #define FIND_WR_ANY 0 1869 #define FIND_WR_FSUID_ONLY 1 1870 #define FIND_WR_WITH_DELETE 2 1871 1872 #define MID_FREE 0 1873 #define MID_REQUEST_ALLOCATED 1 1874 #define MID_REQUEST_SUBMITTED 2 1875 #define MID_RESPONSE_RECEIVED 4 1876 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1877 #define MID_RESPONSE_MALFORMED 0x10 1878 #define MID_SHUTDOWN 0x20 1879 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1880 1881 /* Flags */ 1882 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1883 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1884 1885 /* Types of response buffer returned from SendReceive2 */ 1886 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1887 #define CIFS_SMALL_BUFFER 1 1888 #define CIFS_LARGE_BUFFER 2 1889 #define CIFS_IOVEC 4 /* array of response buffers */ 1890 1891 /* Type of Request to SendReceive2 */ 1892 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1893 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1894 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1895 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1896 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1897 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1898 1899 /* Type of request operation */ 1900 #define CIFS_ECHO_OP 0x080 /* echo request */ 1901 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1902 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1903 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1904 /* Lower bitmask values are reserved by others below. */ 1905 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1906 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1907 1908 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1909 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1910 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1911 #define CIFS_COMPRESS_REQ 0x4000 /* compress request before sending */ 1912 1913 /* Security Flags: indicate type of session setup needed */ 1914 #define CIFSSEC_MAY_SIGN 0x00001 1915 #define CIFSSEC_MAY_NTLMV2 0x00004 1916 #define CIFSSEC_MAY_KRB5 0x00008 1917 #define CIFSSEC_MAY_SEAL 0x00040 1918 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1919 1920 #define CIFSSEC_MUST_SIGN 0x01001 1921 /* note that only one of the following can be set so the 1922 result of setting MUST flags more than once will be to 1923 require use of the stronger protocol */ 1924 #define CIFSSEC_MUST_NTLMV2 0x04004 1925 #define CIFSSEC_MUST_KRB5 0x08008 1926 #ifdef CONFIG_CIFS_UPCALL 1927 #define CIFSSEC_MASK 0xCF0CF /* flags supported if no weak allowed */ 1928 #else 1929 #define CIFSSEC_MASK 0xC70C7 /* flags supported if no weak allowed */ 1930 #endif /* UPCALL */ 1931 #define CIFSSEC_MUST_SEAL 0x40040 1932 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1933 1934 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP | CIFSSEC_MAY_SEAL) 1935 #define CIFSSEC_MAX (CIFSSEC_MAY_SIGN | CIFSSEC_MUST_KRB5 | CIFSSEC_MAY_SEAL) 1936 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1937 /* 1938 ***************************************************************** 1939 * All constants go here 1940 ***************************************************************** 1941 */ 1942 1943 #define UID_HASH (16) 1944 1945 /* 1946 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1947 * following to be declared. 1948 */ 1949 1950 /**************************************************************************** 1951 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1952 * to the locking order. i.e. if two locks are to be held together, the lock that 1953 * appears higher in this list needs to be taken before the other. 1954 * 1955 * If you hold a lock that is lower in this list, and you need to take a higher lock 1956 * (or if you think that one of the functions that you're calling may need to), first 1957 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1958 * ensure that locks are picked up only in one direction in the below table 1959 * (top to bottom). 1960 * 1961 * Also, if you expect a function to be called with a lock held, explicitly document 1962 * this in the comments on top of your function definition. 1963 * 1964 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1965 * possible. Blocking / calling other functions with a lock held always increase 1966 * the risk of a possible deadlock. 1967 * 1968 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1969 * debug. Also, any new lock that you introduce, please add to this list in the correct 1970 * order. 1971 * 1972 * Please populate this list whenever you introduce new locks in your changes. Or in 1973 * case I've missed some existing locks. Please ensure that it's added in the list 1974 * based on the locking order expected. 1975 * 1976 * ===================================================================================== 1977 * Lock Protects Initialization fn 1978 * ===================================================================================== 1979 * vol_list_lock 1980 * vol_info->ctx_lock vol_info->ctx 1981 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1982 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1983 * reconnect_mutex 1984 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1985 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1986 * cifs_tcon 1987 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1988 * cifs_tcon->pending_opens 1989 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1990 * cifs_tcon->bytes_written 1991 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1992 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1993 * GlobalCurrentXid 1994 * GlobalTotalActiveXid 1995 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1996 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1997 * ->CurrentMid 1998 * (any changes in mid_q_entry fields) 1999 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 2000 * ->credits 2001 * ->echo_credits 2002 * ->oplock_credits 2003 * ->reconnect_instance 2004 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 2005 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 2006 * ->iface_count 2007 * ->iface_last_update 2008 * cifs_ses->chan_lock cifs_ses->chans 2009 * ->chans_need_reconnect 2010 * ->chans_in_reconnect 2011 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 2012 * inode->i_rwsem, taken by fs/netfs/locking.c e.g. should be taken before cifsInodeInfo locks 2013 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 2014 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 2015 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 2016 * ->can_cache_brlcks 2017 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 2018 * cached_fids->cfid_list_lock cifs_tcon->cfids->entries init_cached_dirs 2019 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 2020 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 2021 * ->invalidHandle initiate_cifs_search 2022 * ->oplock_break_cancelled 2023 ****************************************************************************/ 2024 2025 #ifdef DECLARE_GLOBALS_HERE 2026 #define GLOBAL_EXTERN 2027 #else 2028 #define GLOBAL_EXTERN extern 2029 #endif 2030 2031 /* 2032 * the list of TCP_Server_Info structures, ie each of the sockets 2033 * connecting our client to a distinct server (ip address), is 2034 * chained together by cifs_tcp_ses_list. The list of all our SMB 2035 * sessions (and from that the tree connections) can be found 2036 * by iterating over cifs_tcp_ses_list 2037 */ 2038 extern struct list_head cifs_tcp_ses_list; 2039 2040 /* 2041 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 2042 * tcp session, and the list of tcon's per smb session. It also protects 2043 * the reference counters for the server, smb session, and tcon. 2044 * generally the locks should be taken in order tcp_ses_lock before 2045 * tcon->open_file_lock and that before file->file_info_lock since the 2046 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 2047 */ 2048 extern spinlock_t cifs_tcp_ses_lock; 2049 2050 /* 2051 * Global transaction id (XID) information 2052 */ 2053 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Lock */ 2054 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Lock */ 2055 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Lock */ 2056 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2057 2058 /* 2059 * Global counters, updated atomically 2060 */ 2061 extern atomic_t sesInfoAllocCount; 2062 extern atomic_t tconInfoAllocCount; 2063 extern atomic_t tcpSesNextId; 2064 extern atomic_t tcpSesAllocCount; 2065 extern atomic_t tcpSesReconnectCount; 2066 extern atomic_t tconInfoReconnectCount; 2067 2068 /* Various Debug counters */ 2069 extern atomic_t buf_alloc_count; /* current number allocated */ 2070 extern atomic_t small_buf_alloc_count; 2071 #ifdef CONFIG_CIFS_STATS2 2072 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2073 extern atomic_t total_small_buf_alloc_count; 2074 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2075 #endif 2076 2077 /* Misc globals */ 2078 extern bool enable_oplocks; /* enable or disable oplocks */ 2079 extern bool lookupCacheEnabled; 2080 extern unsigned int global_secflags; /* if on, session setup sent 2081 with more secure ntlmssp2 challenge/resp */ 2082 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2083 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2084 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2085 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2086 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2087 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2088 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2089 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2090 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2091 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2092 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2093 extern atomic_t mid_count; 2094 2095 void cifs_oplock_break(struct work_struct *work); 2096 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2097 void smb2_deferred_work_close(struct work_struct *work); 2098 2099 extern const struct slow_work_ops cifs_oplock_break_ops; 2100 extern struct workqueue_struct *cifsiod_wq; 2101 extern struct workqueue_struct *decrypt_wq; 2102 extern struct workqueue_struct *fileinfo_put_wq; 2103 extern struct workqueue_struct *cifsoplockd_wq; 2104 extern struct workqueue_struct *deferredclose_wq; 2105 extern struct workqueue_struct *serverclose_wq; 2106 extern struct workqueue_struct *cfid_put_wq; 2107 extern __u32 cifs_lock_secret; 2108 2109 extern mempool_t *cifs_sm_req_poolp; 2110 extern mempool_t *cifs_req_poolp; 2111 extern mempool_t *cifs_mid_poolp; 2112 extern mempool_t cifs_io_request_pool; 2113 extern mempool_t cifs_io_subrequest_pool; 2114 2115 /* Operations for different SMB versions */ 2116 #define SMB1_VERSION_STRING "1.0" 2117 #define SMB20_VERSION_STRING "2.0" 2118 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2119 extern struct smb_version_operations smb1_operations; 2120 extern struct smb_version_values smb1_values; 2121 extern struct smb_version_operations smb20_operations; 2122 extern struct smb_version_values smb20_values; 2123 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2124 #define SMB21_VERSION_STRING "2.1" 2125 extern struct smb_version_operations smb21_operations; 2126 extern struct smb_version_values smb21_values; 2127 #define SMBDEFAULT_VERSION_STRING "default" 2128 extern struct smb_version_values smbdefault_values; 2129 #define SMB3ANY_VERSION_STRING "3" 2130 extern struct smb_version_values smb3any_values; 2131 #define SMB30_VERSION_STRING "3.0" 2132 extern struct smb_version_operations smb30_operations; 2133 extern struct smb_version_values smb30_values; 2134 #define SMB302_VERSION_STRING "3.02" 2135 #define ALT_SMB302_VERSION_STRING "3.0.2" 2136 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2137 extern struct smb_version_values smb302_values; 2138 #define SMB311_VERSION_STRING "3.1.1" 2139 #define ALT_SMB311_VERSION_STRING "3.11" 2140 extern struct smb_version_operations smb311_operations; 2141 extern struct smb_version_values smb311_values; 2142 2143 static inline char *get_security_type_str(enum securityEnum sectype) 2144 { 2145 switch (sectype) { 2146 case RawNTLMSSP: 2147 return "RawNTLMSSP"; 2148 case Kerberos: 2149 return "Kerberos"; 2150 case NTLMv2: 2151 return "NTLMv2"; 2152 case IAKerb: 2153 return "IAKerb"; 2154 default: 2155 return "Unknown"; 2156 } 2157 } 2158 2159 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2160 { 2161 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2162 } 2163 2164 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2165 { 2166 /* 2167 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2168 * Subsystem Notifies That a Share Is a DFS Share. 2169 * 2170 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2171 * Application Updates a Share. 2172 */ 2173 if (!tcon || !tcon->ses || !tcon->ses->server) 2174 return false; 2175 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2176 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2177 } 2178 2179 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2180 const struct dfs_info3_param *ref) 2181 { 2182 /* 2183 * Check if all targets are capable of handling DFS referrals as per 2184 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2185 */ 2186 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2187 } 2188 2189 static inline u64 cifs_flock_len(const struct file_lock *fl) 2190 { 2191 return (u64)fl->fl_end - fl->fl_start + 1; 2192 } 2193 2194 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2195 { 2196 if (WARN_ON_ONCE(!ses || !ses->server)) 2197 return 0; 2198 /* 2199 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2200 * servers do require it during NTLMSSP. 2201 */ 2202 if (ses->server->dialect <= SMB20_PROT_ID) 2203 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2204 return sizeof(ses->workstation_name); 2205 } 2206 2207 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2208 { 2209 memcpy(dst, src, (size_t)((u8 *)&src->EASize - (u8 *)src)); 2210 dst->IndexNumber = 0; 2211 dst->EASize = src->EASize; 2212 dst->AccessFlags = 0; 2213 dst->CurrentByteOffset = 0; 2214 dst->Mode = 0; 2215 dst->AlignmentRequirement = 0; 2216 dst->FileNameLength = src->FileNameLength; 2217 } 2218 2219 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2220 int num_rqst, 2221 const u8 *sig) 2222 { 2223 unsigned int len, skip; 2224 unsigned int nents = 0; 2225 unsigned long addr; 2226 size_t data_size; 2227 int i, j; 2228 2229 /* 2230 * The first rqst has a transform header where the first 20 bytes are 2231 * not part of the encrypted blob. 2232 */ 2233 skip = 20; 2234 2235 /* Assumes the first rqst has a transform header as the first iov. 2236 * I.e. 2237 * rqst[0].rq_iov[0] is transform header 2238 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2239 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2240 */ 2241 for (i = 0; i < num_rqst; i++) { 2242 data_size = iov_iter_count(&rqst[i].rq_iter); 2243 2244 /* We really don't want a mixture of pinned and unpinned pages 2245 * in the sglist. It's hard to keep track of which is what. 2246 * Instead, we convert to a BVEC-type iterator higher up. 2247 */ 2248 if (data_size && 2249 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2250 return -EIO; 2251 2252 /* We also don't want to have any extra refs or pins to clean 2253 * up in the sglist. 2254 */ 2255 if (data_size && 2256 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2257 return -EIO; 2258 2259 for (j = 0; j < rqst[i].rq_nvec; j++) { 2260 struct kvec *iov = &rqst[i].rq_iov[j]; 2261 2262 addr = (unsigned long)iov->iov_base + skip; 2263 if (is_vmalloc_or_module_addr((void *)addr)) { 2264 len = iov->iov_len - skip; 2265 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2266 PAGE_SIZE); 2267 } else { 2268 nents++; 2269 } 2270 skip = 0; 2271 } 2272 if (data_size) 2273 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2274 } 2275 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2276 return nents; 2277 } 2278 2279 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2280 * stack object as buf. 2281 */ 2282 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2283 const void *buf, 2284 unsigned int buflen) 2285 { 2286 unsigned long addr = (unsigned long)buf; 2287 unsigned int off = offset_in_page(addr); 2288 2289 addr &= PAGE_MASK; 2290 if (is_vmalloc_or_module_addr((void *)addr)) { 2291 do { 2292 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2293 2294 sg_set_page(&sgtable->sgl[sgtable->nents++], 2295 vmalloc_to_page((void *)addr), len, off); 2296 2297 off = 0; 2298 addr += PAGE_SIZE; 2299 buflen -= len; 2300 } while (buflen); 2301 } else { 2302 sg_set_page(&sgtable->sgl[sgtable->nents++], 2303 virt_to_page((void *)addr), buflen, off); 2304 } 2305 } 2306 2307 #define CIFS_OPARMS(_cifs_sb, _tcon, _path, _da, _cd, _co, _mode) \ 2308 ((struct cifs_open_parms) { \ 2309 .tcon = _tcon, \ 2310 .path = _path, \ 2311 .desired_access = (_da), \ 2312 .disposition = (_cd), \ 2313 .create_options = cifs_create_options(_cifs_sb, (_co)), \ 2314 .mode = (_mode), \ 2315 .cifs_sb = _cifs_sb, \ 2316 }) 2317 2318 struct smb2_compound_vars { 2319 struct cifs_open_parms oparms; 2320 struct kvec rsp_iov[MAX_COMPOUND]; 2321 struct smb_rqst rqst[MAX_COMPOUND]; 2322 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2323 struct kvec qi_iov; 2324 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2325 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2326 struct kvec close_iov; 2327 struct smb2_file_rename_info rename_info; 2328 struct smb2_file_link_info link_info; 2329 struct kvec ea_iov; 2330 }; 2331 2332 static inline bool cifs_ses_exiting(struct cifs_ses *ses) 2333 { 2334 bool ret; 2335 2336 spin_lock(&ses->ses_lock); 2337 ret = ses->ses_status == SES_EXITING; 2338 spin_unlock(&ses->ses_lock); 2339 return ret; 2340 } 2341 2342 static inline bool cifs_netbios_name(const char *name, size_t namelen) 2343 { 2344 bool ret = false; 2345 size_t i; 2346 2347 if (namelen >= 1 && namelen <= RFC1001_NAME_LEN) { 2348 for (i = 0; i < namelen; i++) { 2349 const unsigned char c = name[i]; 2350 2351 if (c == '\\' || c == '/' || c == ':' || c == '*' || 2352 c == '?' || c == '"' || c == '<' || c == '>' || 2353 c == '|' || c == '.') 2354 return false; 2355 if (!ret && isalpha(c)) 2356 ret = true; 2357 } 2358 } 2359 return ret; 2360 } 2361 2362 #endif /* _CIFS_GLOB_H */ 2363