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 attribute cache timeout (jiffies) - 2^30 54 */ 55 #define CIFS_MAX_ACTIMEO (1 << 30) 56 57 /* 58 * Max persistent and resilient handle timeout (milliseconds). 59 * Windows durable max was 960000 (16 minutes) 60 */ 61 #define SMB3_MAX_HANDLE_TIMEOUT 960000 62 63 /* 64 * MAX_REQ is the maximum number of requests that WE will send 65 * on one socket concurrently. 66 */ 67 #define CIFS_MAX_REQ 32767 68 69 #define RFC1001_NAME_LEN 15 70 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 71 72 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 73 #define SERVER_NAME_LENGTH 80 74 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 75 76 /* echo interval in seconds */ 77 #define SMB_ECHO_INTERVAL_MIN 1 78 #define SMB_ECHO_INTERVAL_MAX 600 79 #define SMB_ECHO_INTERVAL_DEFAULT 60 80 81 /* smb multichannel query server interfaces interval in seconds */ 82 #define SMB_INTERFACE_POLL_INTERVAL 600 83 84 /* maximum number of PDUs in one compound */ 85 #define MAX_COMPOUND 5 86 87 /* 88 * Default number of credits to keep available for SMB3. 89 * This value is chosen somewhat arbitrarily. The Windows client 90 * defaults to 128 credits, the Windows server allows clients up to 91 * 512 credits (or 8K for later versions), and the NetApp server 92 * does not limit clients at all. Choose a high enough default value 93 * such that the client shouldn't limit performance, but allow mount 94 * to override (until you approach 64K, where we limit credits to 65000 95 * to reduce possibility of seeing more server credit overflow bugs. 96 */ 97 #define SMB2_MAX_CREDITS_AVAILABLE 32000 98 99 #include "cifspdu.h" 100 101 #ifndef XATTR_DOS_ATTRIB 102 #define XATTR_DOS_ATTRIB "user.DOSATTRIB" 103 #endif 104 105 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ 106 107 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) 108 109 /* 110 * CIFS vfs client Status information (based on what we know.) 111 */ 112 113 /* associated with each connection */ 114 enum statusEnum { 115 CifsNew = 0, 116 CifsGood, 117 CifsExiting, 118 CifsNeedReconnect, 119 CifsNeedNegotiate, 120 CifsInNegotiate, 121 }; 122 123 /* associated with each smb session */ 124 enum ses_status_enum { 125 SES_NEW = 0, 126 SES_GOOD, 127 SES_EXITING, 128 SES_NEED_RECON, 129 SES_IN_SETUP 130 }; 131 132 /* associated with each tree connection to the server */ 133 enum tid_status_enum { 134 TID_NEW = 0, 135 TID_GOOD, 136 TID_EXITING, 137 TID_NEED_RECON, 138 TID_NEED_TCON, 139 TID_IN_TCON, 140 TID_NEED_FILES_INVALIDATE, /* currently unused */ 141 TID_IN_FILES_INVALIDATE 142 }; 143 144 enum securityEnum { 145 Unspecified = 0, /* not specified */ 146 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 147 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 148 Kerberos, /* Kerberos via SPNEGO */ 149 }; 150 151 struct session_key { 152 unsigned int len; 153 char *response; 154 }; 155 156 /* crypto hashing related structure/fields, not specific to a sec mech */ 157 struct cifs_secmech { 158 struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ 159 struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ 160 struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ 161 struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ 162 struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ 163 164 struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ 165 struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ 166 }; 167 168 /* per smb session structure/fields */ 169 struct ntlmssp_auth { 170 bool sesskey_per_smbsess; /* whether session key is per smb session */ 171 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 172 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 173 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 174 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 175 }; 176 177 struct cifs_cred { 178 int uid; 179 int gid; 180 int mode; 181 int cecount; 182 struct cifs_sid osid; 183 struct cifs_sid gsid; 184 struct cifs_ntace *ntaces; 185 struct cifs_ace *aces; 186 }; 187 188 struct cifs_open_info_data { 189 bool adjust_tz; 190 union { 191 bool reparse_point; 192 bool symlink; 193 }; 194 __u32 reparse_tag; 195 char *symlink_target; 196 union { 197 struct smb2_file_all_info fi; 198 struct smb311_posix_qinfo posix_fi; 199 }; 200 }; 201 202 #define cifs_open_data_reparse(d) \ 203 ((d)->reparse_point || \ 204 (le32_to_cpu((d)->fi.Attributes) & ATTR_REPARSE)) 205 206 static inline void cifs_free_open_info(struct cifs_open_info_data *data) 207 { 208 kfree(data->symlink_target); 209 } 210 211 /* 212 ***************************************************************** 213 * Except the CIFS PDUs themselves all the 214 * globally interesting structs should go here 215 ***************************************************************** 216 */ 217 218 /* 219 * A smb_rqst represents a complete request to be issued to a server. It's 220 * formed by a kvec array, followed by an array of pages. Page data is assumed 221 * to start at the beginning of the first page. 222 */ 223 struct smb_rqst { 224 struct kvec *rq_iov; /* array of kvecs */ 225 unsigned int rq_nvec; /* number of kvecs in array */ 226 size_t rq_iter_size; /* Amount of data in ->rq_iter */ 227 struct iov_iter rq_iter; /* Data iterator */ 228 struct xarray rq_buffer; /* Page buffer for encryption */ 229 }; 230 231 struct mid_q_entry; 232 struct TCP_Server_Info; 233 struct cifsFileInfo; 234 struct cifs_ses; 235 struct cifs_tcon; 236 struct dfs_info3_param; 237 struct cifs_fattr; 238 struct smb3_fs_context; 239 struct cifs_fid; 240 struct cifs_readdata; 241 struct cifs_writedata; 242 struct cifs_io_parms; 243 struct cifs_search_info; 244 struct cifsInodeInfo; 245 struct cifs_open_parms; 246 struct cifs_credits; 247 248 struct smb_version_operations { 249 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 250 struct mid_q_entry *); 251 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 252 /* setup request: allocate mid, sign message */ 253 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 254 struct TCP_Server_Info *, 255 struct smb_rqst *); 256 /* setup async request: allocate mid, sign message */ 257 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 258 struct smb_rqst *); 259 /* check response: verify signature, map error */ 260 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 261 bool); 262 void (*add_credits)(struct TCP_Server_Info *server, 263 const struct cifs_credits *credits, 264 const int optype); 265 void (*set_credits)(struct TCP_Server_Info *, const int); 266 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 267 unsigned int (*get_credits)(struct mid_q_entry *); 268 __u64 (*get_next_mid)(struct TCP_Server_Info *); 269 void (*revert_current_mid)(struct TCP_Server_Info *server, 270 const unsigned int val); 271 /* data offset from read response message */ 272 unsigned int (*read_data_offset)(char *); 273 /* 274 * Data length from read response message 275 * When in_remaining is true, the returned data length is in 276 * message field DataRemaining for out-of-band data read (e.g through 277 * Memory Registration RDMA write in SMBD). 278 * Otherwise, the returned data length is in message field DataLength. 279 */ 280 unsigned int (*read_data_length)(char *, bool in_remaining); 281 /* map smb to linux error */ 282 int (*map_error)(char *, bool); 283 /* find mid corresponding to the response message */ 284 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 285 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 286 void (*clear_stats)(struct cifs_tcon *); 287 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 288 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 289 /* verify the message */ 290 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 291 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 292 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 293 void (*downgrade_oplock)(struct TCP_Server_Info *server, 294 struct cifsInodeInfo *cinode, __u32 oplock, 295 unsigned int epoch, bool *purge_cache); 296 /* process transaction2 response */ 297 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 298 char *, int); 299 /* check if we need to negotiate */ 300 bool (*need_neg)(struct TCP_Server_Info *); 301 /* negotiate to the server */ 302 int (*negotiate)(const unsigned int xid, 303 struct cifs_ses *ses, 304 struct TCP_Server_Info *server); 305 /* set negotiated write size */ 306 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 307 /* set negotiated read size */ 308 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 309 /* setup smb sessionn */ 310 int (*sess_setup)(const unsigned int, struct cifs_ses *, 311 struct TCP_Server_Info *server, 312 const struct nls_table *); 313 /* close smb session */ 314 int (*logoff)(const unsigned int, struct cifs_ses *); 315 /* connect to a server share */ 316 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 317 struct cifs_tcon *, const struct nls_table *); 318 /* close tree connecion */ 319 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 320 /* get DFS referrals */ 321 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 322 const char *, struct dfs_info3_param **, 323 unsigned int *, const struct nls_table *, int); 324 /* informational QFS call */ 325 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 326 struct cifs_sb_info *); 327 /* check if a path is accessible or not */ 328 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 329 struct cifs_sb_info *, const char *); 330 /* query path data from the server */ 331 int (*query_path_info)(const unsigned int xid, 332 struct cifs_tcon *tcon, 333 struct cifs_sb_info *cifs_sb, 334 const char *full_path, 335 struct cifs_open_info_data *data); 336 /* query file data from the server */ 337 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 338 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 339 /* query reparse point to determine which type of special file */ 340 int (*query_reparse_point)(const unsigned int xid, 341 struct cifs_tcon *tcon, 342 struct cifs_sb_info *cifs_sb, 343 const char *full_path, 344 u32 *tag, struct kvec *rsp, 345 int *rsp_buftype); 346 /* get server index number */ 347 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 348 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 349 struct cifs_open_info_data *data); 350 /* set size by path */ 351 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 352 const char *, __u64, struct cifs_sb_info *, bool); 353 /* set size by file handle */ 354 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 355 struct cifsFileInfo *, __u64, bool); 356 /* set attributes */ 357 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 358 const unsigned int); 359 int (*set_compression)(const unsigned int, struct cifs_tcon *, 360 struct cifsFileInfo *); 361 /* check if we can send an echo or nor */ 362 bool (*can_echo)(struct TCP_Server_Info *); 363 /* send echo request */ 364 int (*echo)(struct TCP_Server_Info *); 365 /* create directory */ 366 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 367 umode_t mode, struct cifs_tcon *tcon, 368 const char *full_path, 369 struct cifs_sb_info *cifs_sb); 370 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 371 struct cifs_tcon *tcon, const char *name, 372 struct cifs_sb_info *sb); 373 /* set info on created directory */ 374 void (*mkdir_setinfo)(struct inode *, const char *, 375 struct cifs_sb_info *, struct cifs_tcon *, 376 const unsigned int); 377 /* remove directory */ 378 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 379 struct cifs_sb_info *); 380 /* unlink file */ 381 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 382 struct cifs_sb_info *); 383 /* open, rename and delete file */ 384 int (*rename_pending_delete)(const char *, struct dentry *, 385 const unsigned int); 386 /* send rename request */ 387 int (*rename)(const unsigned int, struct cifs_tcon *, const char *, 388 const char *, struct cifs_sb_info *); 389 /* send create hardlink request */ 390 int (*create_hardlink)(const unsigned int, struct cifs_tcon *, 391 const char *, const char *, 392 struct cifs_sb_info *); 393 /* query symlink target */ 394 int (*query_symlink)(const unsigned int xid, 395 struct cifs_tcon *tcon, 396 struct cifs_sb_info *cifs_sb, 397 const char *full_path, 398 char **target_path, 399 struct kvec *rsp_iov); 400 /* open a file for non-posix mounts */ 401 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 402 void *buf); 403 /* set fid protocol-specific info */ 404 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 405 /* close a file */ 406 void (*close)(const unsigned int, struct cifs_tcon *, 407 struct cifs_fid *); 408 /* close a file, returning file attributes and timestamps */ 409 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 410 struct cifsFileInfo *pfile_info); 411 /* send a flush request to the server */ 412 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 413 /* async read from the server */ 414 int (*async_readv)(struct cifs_readdata *); 415 /* async write to the server */ 416 int (*async_writev)(struct cifs_writedata *, 417 void (*release)(struct kref *)); 418 /* sync read from the server */ 419 int (*sync_read)(const unsigned int, struct cifs_fid *, 420 struct cifs_io_parms *, unsigned int *, char **, 421 int *); 422 /* sync write to the server */ 423 int (*sync_write)(const unsigned int, struct cifs_fid *, 424 struct cifs_io_parms *, unsigned int *, struct kvec *, 425 unsigned long); 426 /* open dir, start readdir */ 427 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 428 const char *, struct cifs_sb_info *, 429 struct cifs_fid *, __u16, 430 struct cifs_search_info *); 431 /* continue readdir */ 432 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 433 struct cifs_fid *, 434 __u16, struct cifs_search_info *srch_inf); 435 /* close dir */ 436 int (*close_dir)(const unsigned int, struct cifs_tcon *, 437 struct cifs_fid *); 438 /* calculate a size of SMB message */ 439 unsigned int (*calc_smb_size)(void *buf); 440 /* check for STATUS_PENDING and process the response if yes */ 441 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 442 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 443 bool (*is_session_expired)(char *); 444 /* send oplock break response */ 445 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 446 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 447 /* query remote filesystem */ 448 int (*queryfs)(const unsigned int, struct cifs_tcon *, 449 struct cifs_sb_info *, struct kstatfs *); 450 /* send mandatory brlock to the server */ 451 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 452 __u64, __u32, int, int, bool); 453 /* unlock range of mandatory locks */ 454 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 455 const unsigned int); 456 /* push brlocks from the cache to the server */ 457 int (*push_mand_locks)(struct cifsFileInfo *); 458 /* get lease key of the inode */ 459 void (*get_lease_key)(struct inode *, struct cifs_fid *); 460 /* set lease key of the inode */ 461 void (*set_lease_key)(struct inode *, struct cifs_fid *); 462 /* generate new lease key */ 463 void (*new_lease_key)(struct cifs_fid *); 464 int (*generate_signingkey)(struct cifs_ses *ses, 465 struct TCP_Server_Info *server); 466 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 467 bool allocate_crypto); 468 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 469 struct cifsFileInfo *src_file); 470 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 471 struct cifsFileInfo *src_file, void __user *); 472 int (*notify)(const unsigned int xid, struct file *pfile, 473 void __user *pbuf, bool return_changes); 474 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 475 struct cifs_sb_info *, const unsigned char *, 476 char *, unsigned int *); 477 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 478 struct cifs_sb_info *, const unsigned char *, 479 char *, unsigned int *); 480 /* if we can do cache read operations */ 481 bool (*is_read_op)(__u32); 482 /* set oplock level for the inode */ 483 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 484 bool *); 485 /* create lease context buffer for CREATE request */ 486 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 487 /* parse lease context buffer and return oplock/epoch info */ 488 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 489 ssize_t (*copychunk_range)(const unsigned int, 490 struct cifsFileInfo *src_file, 491 struct cifsFileInfo *target_file, 492 u64 src_off, u64 len, u64 dest_off); 493 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 494 struct cifsFileInfo *target_file, u64 src_off, u64 len, 495 u64 dest_off); 496 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 497 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 498 const unsigned char *, const unsigned char *, char *, 499 size_t, struct cifs_sb_info *); 500 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 501 const char *, const void *, const __u16, 502 const struct nls_table *, struct cifs_sb_info *); 503 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, 504 const char *, u32 *, u32); 505 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, 506 const struct cifs_fid *, u32 *, u32); 507 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, 508 int); 509 /* writepages retry size */ 510 unsigned int (*wp_retry_size)(struct inode *); 511 /* get mtu credits */ 512 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, 513 unsigned int *, struct cifs_credits *); 514 /* adjust previously taken mtu credits to request size */ 515 int (*adjust_credits)(struct TCP_Server_Info *server, 516 struct cifs_credits *credits, 517 const unsigned int payload_size); 518 /* check if we need to issue closedir */ 519 bool (*dir_needs_close)(struct cifsFileInfo *); 520 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 521 loff_t); 522 /* init transform request - used for encryption for now */ 523 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 524 struct smb_rqst *, struct smb_rqst *); 525 int (*is_transform_hdr)(void *buf); 526 int (*receive_transform)(struct TCP_Server_Info *, 527 struct mid_q_entry **, char **, int *); 528 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 529 enum securityEnum); 530 int (*next_header)(char *); 531 /* ioctl passthrough for query_info */ 532 int (*ioctl_query_info)(const unsigned int xid, 533 struct cifs_tcon *tcon, 534 struct cifs_sb_info *cifs_sb, 535 __le16 *path, int is_dir, 536 unsigned long p); 537 /* make unix special files (block, char, fifo, socket) */ 538 int (*make_node)(unsigned int xid, 539 struct inode *inode, 540 struct dentry *dentry, 541 struct cifs_tcon *tcon, 542 const char *full_path, 543 umode_t mode, 544 dev_t device_number); 545 /* version specific fiemap implementation */ 546 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 547 struct fiemap_extent_info *, u64, u64); 548 /* version specific llseek implementation */ 549 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 550 /* Check for STATUS_IO_TIMEOUT */ 551 bool (*is_status_io_timeout)(char *buf); 552 /* Check for STATUS_NETWORK_NAME_DELETED */ 553 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 554 }; 555 556 struct smb_version_values { 557 char *version_string; 558 __u16 protocol_id; 559 __u32 req_capabilities; 560 __u32 large_lock_type; 561 __u32 exclusive_lock_type; 562 __u32 shared_lock_type; 563 __u32 unlock_lock_type; 564 size_t header_preamble_size; 565 size_t header_size; 566 size_t max_header_size; 567 size_t read_rsp_size; 568 __le16 lock_cmd; 569 unsigned int cap_unix; 570 unsigned int cap_nt_find; 571 unsigned int cap_large_files; 572 __u16 signing_enabled; 573 __u16 signing_required; 574 size_t create_lease_size; 575 }; 576 577 #define HEADER_SIZE(server) (server->vals->header_size) 578 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 579 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 580 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 581 582 /** 583 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 584 * trying to reuse existing superblock for a new mount 585 */ 586 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 587 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 588 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 589 CIFS_MOUNT_MAP_SFM_CHR | \ 590 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 591 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 592 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 593 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 594 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 595 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 596 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 597 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 598 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 599 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 600 601 /** 602 * Generic VFS superblock mount flags (s_flags) to consider when 603 * trying to reuse existing superblock for a new mount 604 */ 605 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 606 SB_NODEV | SB_SYNCHRONOUS) 607 608 struct cifs_mnt_data { 609 struct cifs_sb_info *cifs_sb; 610 struct smb3_fs_context *ctx; 611 int flags; 612 }; 613 614 static inline unsigned int 615 get_rfc1002_length(void *buf) 616 { 617 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 618 } 619 620 static inline void 621 inc_rfc1001_len(void *buf, int count) 622 { 623 be32_add_cpu((__be32 *)buf, count); 624 } 625 626 struct TCP_Server_Info { 627 struct list_head tcp_ses_list; 628 struct list_head smb_ses_list; 629 spinlock_t srv_lock; /* protect anything here that is not protected */ 630 __u64 conn_id; /* connection identifier (useful for debugging) */ 631 int srv_count; /* reference counter */ 632 /* 15 character server name + 0x20 16th byte indicating type = srv */ 633 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 634 struct smb_version_operations *ops; 635 struct smb_version_values *vals; 636 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 637 enum statusEnum tcpStatus; /* what we think the status is */ 638 char *hostname; /* hostname portion of UNC string */ 639 struct socket *ssocket; 640 struct sockaddr_storage dstaddr; 641 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 642 #ifdef CONFIG_NET_NS 643 struct net *net; 644 #endif 645 wait_queue_head_t response_q; 646 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 647 spinlock_t mid_lock; /* protect mid queue and it's entries */ 648 struct list_head pending_mid_q; 649 bool noblocksnd; /* use blocking sendmsg */ 650 bool noautotune; /* do not autotune send buf sizes */ 651 bool nosharesock; 652 bool tcp_nodelay; 653 unsigned int credits; /* send no more requests at once */ 654 unsigned int max_credits; /* can override large 32000 default at mnt */ 655 unsigned int in_flight; /* number of requests on the wire to server */ 656 unsigned int max_in_flight; /* max number of requests that were on wire */ 657 spinlock_t req_lock; /* protect the two values above */ 658 struct mutex _srv_mutex; 659 unsigned int nofs_flag; 660 struct task_struct *tsk; 661 char server_GUID[16]; 662 __u16 sec_mode; 663 bool sign; /* is signing enabled on this connection? */ 664 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 665 bool session_estab; /* mark when very first sess is established */ 666 int echo_credits; /* echo reserved slots */ 667 int oplock_credits; /* oplock break reserved slots */ 668 bool echoes:1; /* enable echoes */ 669 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 670 u16 dialect; /* dialect index that server chose */ 671 bool oplocks:1; /* enable oplocks */ 672 unsigned int maxReq; /* Clients should submit no more */ 673 /* than maxReq distinct unanswered SMBs to the server when using */ 674 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 675 unsigned int maxBuf; /* maxBuf specifies the maximum */ 676 /* message size the server can send or receive for non-raw SMBs */ 677 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 678 /* when socket is setup (and during reconnect) before NegProt sent */ 679 unsigned int max_rw; /* maxRw specifies the maximum */ 680 /* message size the server can send or receive for */ 681 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 682 unsigned int capabilities; /* selective disabling of caps by smb sess */ 683 int timeAdj; /* Adjust for difference in server time zone in sec */ 684 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 685 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 686 /* 16th byte of RFC1001 workstation name is always null */ 687 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 688 __u32 sequence_number; /* for signing, protected by srv_mutex */ 689 __u32 reconnect_instance; /* incremented on each reconnect */ 690 struct session_key session_key; 691 unsigned long lstrp; /* when we got last response from this server */ 692 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 693 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 694 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 695 char negflavor; /* NEGOTIATE response flavor */ 696 /* extended security flavors that server supports */ 697 bool sec_ntlmssp; /* supports NTLMSSP */ 698 bool sec_kerberosu2u; /* supports U2U Kerberos */ 699 bool sec_kerberos; /* supports plain Kerberos */ 700 bool sec_mskerberos; /* supports legacy MS Kerberos */ 701 bool large_buf; /* is current buffer large? */ 702 /* use SMBD connection instead of socket */ 703 bool rdma; 704 /* point to the SMBD connection if RDMA is used instead of socket */ 705 struct smbd_connection *smbd_conn; 706 struct delayed_work echo; /* echo ping workqueue job */ 707 char *smallbuf; /* pointer to current "small" buffer */ 708 char *bigbuf; /* pointer to current "big" buffer */ 709 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 710 unsigned int pdu_size; 711 unsigned int total_read; /* total amount of data read in this pass */ 712 atomic_t in_send; /* requests trying to send */ 713 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 714 #ifdef CONFIG_CIFS_STATS2 715 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 716 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 717 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 718 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 719 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 720 #endif /* STATS2 */ 721 unsigned int max_read; 722 unsigned int max_write; 723 unsigned int min_offload; 724 __le16 compress_algorithm; 725 __u16 signing_algorithm; 726 __le16 cipher_type; 727 /* save initital negprot hash */ 728 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 729 bool signing_negotiated; /* true if valid signing context rcvd from server */ 730 bool posix_ext_supported; 731 struct delayed_work reconnect; /* reconnect workqueue job */ 732 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 733 unsigned long echo_interval; 734 735 /* 736 * Number of targets available for reconnect. The more targets 737 * the more tasks have to wait to let the demultiplex thread 738 * reconnect. 739 */ 740 int nr_targets; 741 bool noblockcnt; /* use non-blocking connect() */ 742 743 /* 744 * If this is a session channel, 745 * primary_server holds the ref-counted 746 * pointer to primary channel connection for the session. 747 */ 748 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 749 struct TCP_Server_Info *primary_server; 750 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 751 752 #ifdef CONFIG_CIFS_SWN_UPCALL 753 bool use_swn_dstaddr; 754 struct sockaddr_storage swn_dstaddr; 755 #endif 756 struct mutex refpath_lock; /* protects leaf_fullpath */ 757 /* 758 * leaf_fullpath: Canonical DFS referral path related to this 759 * connection. 760 * It is used in DFS cache refresher, reconnect and may 761 * change due to nested DFS links. 762 * 763 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 764 * mostly used for not requiring a copy of @leaf_fullpath when getting 765 * cached or new DFS referrals (which might also sleep during I/O). 766 * While @srv_lock is held for making string and NULL comparions against 767 * both fields as in mount(2) and cache refresh. 768 * 769 * format: \\HOST\SHARE[\OPTIONAL PATH] 770 */ 771 char *leaf_fullpath; 772 }; 773 774 static inline bool is_smb1(struct TCP_Server_Info *server) 775 { 776 return HEADER_PREAMBLE_SIZE(server) != 0; 777 } 778 779 static inline void cifs_server_lock(struct TCP_Server_Info *server) 780 { 781 unsigned int nofs_flag = memalloc_nofs_save(); 782 783 mutex_lock(&server->_srv_mutex); 784 server->nofs_flag = nofs_flag; 785 } 786 787 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 788 { 789 unsigned int nofs_flag = server->nofs_flag; 790 791 mutex_unlock(&server->_srv_mutex); 792 memalloc_nofs_restore(nofs_flag); 793 } 794 795 struct cifs_credits { 796 unsigned int value; 797 unsigned int instance; 798 }; 799 800 static inline unsigned int 801 in_flight(struct TCP_Server_Info *server) 802 { 803 unsigned int num; 804 805 spin_lock(&server->req_lock); 806 num = server->in_flight; 807 spin_unlock(&server->req_lock); 808 return num; 809 } 810 811 static inline bool 812 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 813 { 814 int num; 815 816 spin_lock(&server->req_lock); 817 num = *credits; 818 spin_unlock(&server->req_lock); 819 return num >= num_credits; 820 } 821 822 static inline void 823 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 824 const int optype) 825 { 826 server->ops->add_credits(server, credits, optype); 827 } 828 829 static inline void 830 add_credits_and_wake_if(struct TCP_Server_Info *server, 831 const struct cifs_credits *credits, const int optype) 832 { 833 if (credits->value) { 834 server->ops->add_credits(server, credits, optype); 835 wake_up(&server->request_q); 836 } 837 } 838 839 static inline void 840 set_credits(struct TCP_Server_Info *server, const int val) 841 { 842 server->ops->set_credits(server, val); 843 } 844 845 static inline int 846 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 847 const unsigned int payload_size) 848 { 849 return server->ops->adjust_credits ? 850 server->ops->adjust_credits(server, credits, payload_size) : 0; 851 } 852 853 static inline __le64 854 get_next_mid64(struct TCP_Server_Info *server) 855 { 856 return cpu_to_le64(server->ops->get_next_mid(server)); 857 } 858 859 static inline __le16 860 get_next_mid(struct TCP_Server_Info *server) 861 { 862 __u16 mid = server->ops->get_next_mid(server); 863 /* 864 * The value in the SMB header should be little endian for easy 865 * on-the-wire decoding. 866 */ 867 return cpu_to_le16(mid); 868 } 869 870 static inline void 871 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 872 { 873 if (server->ops->revert_current_mid) 874 server->ops->revert_current_mid(server, val); 875 } 876 877 static inline void 878 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 879 const struct smb2_hdr *shdr) 880 { 881 unsigned int num = le16_to_cpu(shdr->CreditCharge); 882 883 return revert_current_mid(server, num > 0 ? num : 1); 884 } 885 886 static inline __u16 887 get_mid(const struct smb_hdr *smb) 888 { 889 return le16_to_cpu(smb->Mid); 890 } 891 892 static inline bool 893 compare_mid(__u16 mid, const struct smb_hdr *smb) 894 { 895 return mid == le16_to_cpu(smb->Mid); 896 } 897 898 /* 899 * When the server supports very large reads and writes via POSIX extensions, 900 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 901 * including the RFC1001 length. 902 * 903 * Note that this might make for "interesting" allocation problems during 904 * writeback however as we have to allocate an array of pointers for the 905 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 906 * 907 * For reads, there is a similar problem as we need to allocate an array 908 * of kvecs to handle the receive, though that should only need to be done 909 * once. 910 */ 911 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 912 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 913 914 /* 915 * When the server doesn't allow large posix writes, only allow a rsize/wsize 916 * of 2^17-1 minus the size of the call header. That allows for a read or 917 * write up to the maximum size described by RFC1002. 918 */ 919 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 920 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 921 922 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 923 924 /* 925 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 926 * those values when posix extensions aren't in force. In actuality here, we 927 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 928 * to be ok with the extra byte even though Windows doesn't send writes that 929 * are that large. 930 * 931 * Citation: 932 * 933 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 934 */ 935 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 936 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 937 938 /* 939 * Macros to allow the TCP_Server_Info->net field and related code to drop out 940 * when CONFIG_NET_NS isn't set. 941 */ 942 943 #ifdef CONFIG_NET_NS 944 945 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 946 { 947 return srv->net; 948 } 949 950 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 951 { 952 srv->net = net; 953 } 954 955 #else 956 957 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 958 { 959 return &init_net; 960 } 961 962 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 963 { 964 } 965 966 #endif 967 968 struct cifs_server_iface { 969 struct list_head iface_head; 970 struct kref refcount; 971 size_t speed; 972 unsigned int rdma_capable : 1; 973 unsigned int rss_capable : 1; 974 unsigned int is_active : 1; /* unset if non existent */ 975 struct sockaddr_storage sockaddr; 976 }; 977 978 /* release iface when last ref is dropped */ 979 static inline void 980 release_iface(struct kref *ref) 981 { 982 struct cifs_server_iface *iface = container_of(ref, 983 struct cifs_server_iface, 984 refcount); 985 list_del_init(&iface->iface_head); 986 kfree(iface); 987 } 988 989 struct cifs_chan { 990 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 991 struct TCP_Server_Info *server; 992 struct cifs_server_iface *iface; /* interface in use */ 993 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 994 }; 995 996 /* 997 * Session structure. One of these for each uid session with a particular host 998 */ 999 struct cifs_ses { 1000 struct list_head smb_ses_list; 1001 struct list_head rlist; /* reconnect list */ 1002 struct list_head tcon_list; 1003 struct cifs_tcon *tcon_ipc; 1004 spinlock_t ses_lock; /* protect anything here that is not protected */ 1005 struct mutex session_mutex; 1006 struct TCP_Server_Info *server; /* pointer to server info */ 1007 int ses_count; /* reference counter */ 1008 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1009 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1010 char *serverOS; /* name of operating system underlying server */ 1011 char *serverNOS; /* name of network operating system of server */ 1012 char *serverDomain; /* security realm of server */ 1013 __u64 Suid; /* remote smb uid */ 1014 kuid_t linux_uid; /* overriding owner of files on the mount */ 1015 kuid_t cred_uid; /* owner of credentials */ 1016 unsigned int capabilities; 1017 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1018 char *user_name; /* must not be null except during init of sess 1019 and after mount option parsing we fill it */ 1020 char *domainName; 1021 char *password; 1022 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1023 struct session_key auth_key; 1024 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1025 enum securityEnum sectype; /* what security flavor was specified? */ 1026 bool sign; /* is signing required? */ 1027 bool domainAuto:1; 1028 __u16 session_flags; 1029 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1030 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1031 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1032 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1033 1034 /* 1035 * Network interfaces available on the server this session is 1036 * connected to. 1037 * 1038 * Other channels can be opened by connecting and binding this 1039 * session to interfaces from this list. 1040 * 1041 * iface_lock should be taken when accessing any of these fields 1042 */ 1043 spinlock_t iface_lock; 1044 /* ========= begin: protected by iface_lock ======== */ 1045 struct list_head iface_list; 1046 size_t iface_count; 1047 unsigned long iface_last_update; /* jiffies */ 1048 /* ========= end: protected by iface_lock ======== */ 1049 1050 spinlock_t chan_lock; 1051 /* ========= begin: protected by chan_lock ======== */ 1052 #define CIFS_MAX_CHANNELS 16 1053 #define CIFS_ALL_CHANNELS_SET(ses) \ 1054 ((1UL << (ses)->chan_count) - 1) 1055 #define CIFS_ALL_CHANS_GOOD(ses) \ 1056 (!(ses)->chans_need_reconnect) 1057 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1058 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1059 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1060 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1061 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1062 test_bit((index), &(ses)->chans_need_reconnect) 1063 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1064 ((ses)->chans[(index)].in_reconnect) 1065 1066 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1067 size_t chan_count; 1068 size_t chan_max; 1069 atomic_t chan_seq; /* round robin state */ 1070 1071 /* 1072 * chans_need_reconnect is a bitmap indicating which of the channels 1073 * under this smb session needs to be reconnected. 1074 * If not multichannel session, only one bit will be used. 1075 * 1076 * We will ask for sess and tcon reconnection only if all the 1077 * channels are marked for needing reconnection. This will 1078 * enable the sessions on top to continue to live till any 1079 * of the channels below are active. 1080 */ 1081 unsigned long chans_need_reconnect; 1082 /* ========= end: protected by chan_lock ======== */ 1083 struct cifs_ses *dfs_root_ses; 1084 struct nls_table *local_nls; 1085 }; 1086 1087 static inline bool 1088 cap_unix(struct cifs_ses *ses) 1089 { 1090 return ses->server->vals->cap_unix & ses->capabilities; 1091 } 1092 1093 /* 1094 * common struct for holding inode info when searching for or updating an 1095 * inode with new info 1096 */ 1097 1098 #define CIFS_FATTR_JUNCTION 0x1 1099 #define CIFS_FATTR_DELETE_PENDING 0x2 1100 #define CIFS_FATTR_NEED_REVAL 0x4 1101 #define CIFS_FATTR_INO_COLLISION 0x8 1102 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1103 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1104 1105 struct cifs_fattr { 1106 u32 cf_flags; 1107 u32 cf_cifsattrs; 1108 u64 cf_uniqueid; 1109 u64 cf_eof; 1110 u64 cf_bytes; 1111 u64 cf_createtime; 1112 kuid_t cf_uid; 1113 kgid_t cf_gid; 1114 umode_t cf_mode; 1115 dev_t cf_rdev; 1116 unsigned int cf_nlink; 1117 unsigned int cf_dtype; 1118 struct timespec64 cf_atime; 1119 struct timespec64 cf_mtime; 1120 struct timespec64 cf_ctime; 1121 u32 cf_cifstag; 1122 char *cf_symlink_target; 1123 }; 1124 1125 /* 1126 * there is one of these for each connection to a resource on a particular 1127 * session 1128 */ 1129 struct cifs_tcon { 1130 struct list_head tcon_list; 1131 int tc_count; 1132 struct list_head rlist; /* reconnect list */ 1133 spinlock_t tc_lock; /* protect anything here that is not protected */ 1134 atomic_t num_local_opens; /* num of all opens including disconnected */ 1135 atomic_t num_remote_opens; /* num of all network opens on server */ 1136 struct list_head openFileList; 1137 spinlock_t open_file_lock; /* protects list above */ 1138 struct cifs_ses *ses; /* pointer to session associated with */ 1139 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1140 char *nativeFileSystem; 1141 char *password; /* for share-level security */ 1142 __u32 tid; /* The 4 byte tree id */ 1143 __u16 Flags; /* optional support bits */ 1144 enum tid_status_enum status; 1145 atomic_t num_smbs_sent; 1146 union { 1147 struct { 1148 atomic_t num_writes; 1149 atomic_t num_reads; 1150 atomic_t num_flushes; 1151 atomic_t num_oplock_brks; 1152 atomic_t num_opens; 1153 atomic_t num_closes; 1154 atomic_t num_deletes; 1155 atomic_t num_mkdirs; 1156 atomic_t num_posixopens; 1157 atomic_t num_posixmkdirs; 1158 atomic_t num_rmdirs; 1159 atomic_t num_renames; 1160 atomic_t num_t2renames; 1161 atomic_t num_ffirst; 1162 atomic_t num_fnext; 1163 atomic_t num_fclose; 1164 atomic_t num_hardlinks; 1165 atomic_t num_symlinks; 1166 atomic_t num_locks; 1167 atomic_t num_acl_get; 1168 atomic_t num_acl_set; 1169 } cifs_stats; 1170 struct { 1171 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1172 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1173 } smb2_stats; 1174 } stats; 1175 __u64 bytes_read; 1176 __u64 bytes_written; 1177 spinlock_t stat_lock; /* protects the two fields above */ 1178 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1179 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1180 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1181 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1182 bool pipe:1; /* set if connection to pipe share */ 1183 bool print:1; /* set if connection to printer share */ 1184 bool retry:1; 1185 bool nocase:1; 1186 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1187 bool nodelete:1; 1188 bool seal:1; /* transport encryption for this mounted share */ 1189 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1190 for this mount even if server would support */ 1191 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1192 bool local_lease:1; /* check leases (only) on local system not remote */ 1193 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1194 bool broken_sparse_sup; /* if server or share does not support sparse */ 1195 bool need_reconnect:1; /* connection reset, tid now invalid */ 1196 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1197 bool use_resilient:1; /* use resilient instead of durable handles */ 1198 bool use_persistent:1; /* use persistent instead of durable handles */ 1199 bool no_lease:1; /* Do not request leases on files or directories */ 1200 bool use_witness:1; /* use witness protocol */ 1201 __le32 capabilities; 1202 __u32 share_flags; 1203 __u32 maximal_access; 1204 __u32 vol_serial_number; 1205 __le64 vol_create_time; 1206 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1207 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1208 __u32 ss_flags; /* sector size flags */ 1209 __u32 perf_sector_size; /* best sector size for perf */ 1210 __u32 max_chunks; 1211 __u32 max_bytes_chunk; 1212 __u32 max_bytes_copy; 1213 __u32 max_cached_dirs; 1214 #ifdef CONFIG_CIFS_FSCACHE 1215 u64 resource_id; /* server resource id */ 1216 struct fscache_volume *fscache; /* cookie for share */ 1217 #endif 1218 struct list_head pending_opens; /* list of incomplete opens */ 1219 struct cached_fids *cfids; 1220 /* BB add field for back pointer to sb struct(s)? */ 1221 #ifdef CONFIG_CIFS_DFS_UPCALL 1222 struct list_head dfs_ses_list; 1223 struct delayed_work dfs_cache_work; 1224 #endif 1225 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1226 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1227 }; 1228 1229 /* 1230 * This is a refcounted and timestamped container for a tcon pointer. The 1231 * container holds a tcon reference. It is considered safe to free one of 1232 * these when the tl_count goes to 0. The tl_time is the time of the last 1233 * "get" on the container. 1234 */ 1235 struct tcon_link { 1236 struct rb_node tl_rbnode; 1237 kuid_t tl_uid; 1238 unsigned long tl_flags; 1239 #define TCON_LINK_MASTER 0 1240 #define TCON_LINK_PENDING 1 1241 #define TCON_LINK_IN_TREE 2 1242 unsigned long tl_time; 1243 atomic_t tl_count; 1244 struct cifs_tcon *tl_tcon; 1245 }; 1246 1247 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1248 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1249 1250 static inline struct cifs_tcon * 1251 tlink_tcon(struct tcon_link *tlink) 1252 { 1253 return tlink->tl_tcon; 1254 } 1255 1256 static inline struct tcon_link * 1257 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1258 { 1259 return cifs_sb->master_tlink; 1260 } 1261 1262 extern void cifs_put_tlink(struct tcon_link *tlink); 1263 1264 static inline struct tcon_link * 1265 cifs_get_tlink(struct tcon_link *tlink) 1266 { 1267 if (tlink && !IS_ERR(tlink)) 1268 atomic_inc(&tlink->tl_count); 1269 return tlink; 1270 } 1271 1272 /* This function is always expected to succeed */ 1273 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1274 1275 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1276 1277 struct cifs_pending_open { 1278 struct list_head olist; 1279 struct tcon_link *tlink; 1280 __u8 lease_key[16]; 1281 __u32 oplock; 1282 }; 1283 1284 struct cifs_deferred_close { 1285 struct list_head dlist; 1286 struct tcon_link *tlink; 1287 __u16 netfid; 1288 __u64 persistent_fid; 1289 __u64 volatile_fid; 1290 }; 1291 1292 /* 1293 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1294 * This is used to track byte stream locks on the file 1295 */ 1296 struct cifsLockInfo { 1297 struct list_head llist; /* pointer to next cifsLockInfo */ 1298 struct list_head blist; /* pointer to locks blocked on this */ 1299 wait_queue_head_t block_q; 1300 __u64 offset; 1301 __u64 length; 1302 __u32 pid; 1303 __u16 type; 1304 __u16 flags; 1305 }; 1306 1307 /* 1308 * One of these for each open instance of a file 1309 */ 1310 struct cifs_search_info { 1311 loff_t index_of_last_entry; 1312 __u16 entries_in_buffer; 1313 __u16 info_level; 1314 __u32 resume_key; 1315 char *ntwrk_buf_start; 1316 char *srch_entries_start; 1317 char *last_entry; 1318 const char *presume_name; 1319 unsigned int resume_name_len; 1320 bool endOfSearch:1; 1321 bool emptyDir:1; 1322 bool unicode:1; 1323 bool smallBuf:1; /* so we know which buf_release function to call */ 1324 }; 1325 1326 #define ACL_NO_MODE ((umode_t)(-1)) 1327 struct cifs_open_parms { 1328 struct cifs_tcon *tcon; 1329 struct cifs_sb_info *cifs_sb; 1330 int disposition; 1331 int desired_access; 1332 int create_options; 1333 const char *path; 1334 struct cifs_fid *fid; 1335 umode_t mode; 1336 bool reconnect:1; 1337 }; 1338 1339 struct cifs_fid { 1340 __u16 netfid; 1341 __u64 persistent_fid; /* persist file id for smb2 */ 1342 __u64 volatile_fid; /* volatile file id for smb2 */ 1343 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1344 __u8 create_guid[16]; 1345 __u32 access; 1346 struct cifs_pending_open *pending_open; 1347 unsigned int epoch; 1348 #ifdef CONFIG_CIFS_DEBUG2 1349 __u64 mid; 1350 #endif /* CIFS_DEBUG2 */ 1351 bool purge_cache; 1352 }; 1353 1354 struct cifs_fid_locks { 1355 struct list_head llist; 1356 struct cifsFileInfo *cfile; /* fid that owns locks */ 1357 struct list_head locks; /* locks held by fid above */ 1358 }; 1359 1360 struct cifsFileInfo { 1361 /* following two lists are protected by tcon->open_file_lock */ 1362 struct list_head tlist; /* pointer to next fid owned by tcon */ 1363 struct list_head flist; /* next fid (file instance) for this inode */ 1364 /* lock list below protected by cifsi->lock_sem */ 1365 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1366 kuid_t uid; /* allows finding which FileInfo structure */ 1367 __u32 pid; /* process id who opened file */ 1368 struct cifs_fid fid; /* file id from remote */ 1369 struct list_head rlist; /* reconnect list */ 1370 /* BB add lock scope info here if needed */ 1371 /* lock scope id (0 if none) */ 1372 struct dentry *dentry; 1373 struct tcon_link *tlink; 1374 unsigned int f_flags; 1375 bool invalidHandle:1; /* file closed via session abend */ 1376 bool swapfile:1; 1377 bool oplock_break_cancelled:1; 1378 unsigned int oplock_epoch; /* epoch from the lease break */ 1379 __u32 oplock_level; /* oplock/lease level from the lease break */ 1380 int count; 1381 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1382 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1383 struct cifs_search_info srch_inf; 1384 struct work_struct oplock_break; /* work for oplock breaks */ 1385 struct work_struct put; /* work for the final part of _put */ 1386 struct delayed_work deferred; 1387 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1388 char *symlink_target; 1389 }; 1390 1391 struct cifs_io_parms { 1392 __u16 netfid; 1393 __u64 persistent_fid; /* persist file id for smb2 */ 1394 __u64 volatile_fid; /* volatile file id for smb2 */ 1395 __u32 pid; 1396 __u64 offset; 1397 unsigned int length; 1398 struct cifs_tcon *tcon; 1399 struct TCP_Server_Info *server; 1400 }; 1401 1402 struct cifs_aio_ctx { 1403 struct kref refcount; 1404 struct list_head list; 1405 struct mutex aio_mutex; 1406 struct completion done; 1407 struct iov_iter iter; 1408 struct kiocb *iocb; 1409 struct cifsFileInfo *cfile; 1410 struct bio_vec *bv; 1411 loff_t pos; 1412 unsigned int nr_pinned_pages; 1413 ssize_t rc; 1414 unsigned int len; 1415 unsigned int total_len; 1416 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1417 bool should_dirty; 1418 /* 1419 * Indicates if this aio_ctx is for direct_io, 1420 * If yes, iter is a copy of the user passed iov_iter 1421 */ 1422 bool direct_io; 1423 }; 1424 1425 /* asynchronous read support */ 1426 struct cifs_readdata { 1427 struct kref refcount; 1428 struct list_head list; 1429 struct completion done; 1430 struct cifsFileInfo *cfile; 1431 struct address_space *mapping; 1432 struct cifs_aio_ctx *ctx; 1433 __u64 offset; 1434 ssize_t got_bytes; 1435 unsigned int bytes; 1436 pid_t pid; 1437 int result; 1438 struct work_struct work; 1439 struct iov_iter iter; 1440 struct kvec iov[2]; 1441 struct TCP_Server_Info *server; 1442 #ifdef CONFIG_CIFS_SMB_DIRECT 1443 struct smbd_mr *mr; 1444 #endif 1445 struct cifs_credits credits; 1446 }; 1447 1448 /* asynchronous write support */ 1449 struct cifs_writedata { 1450 struct kref refcount; 1451 struct list_head list; 1452 struct completion done; 1453 enum writeback_sync_modes sync_mode; 1454 struct work_struct work; 1455 struct cifsFileInfo *cfile; 1456 struct cifs_aio_ctx *ctx; 1457 struct iov_iter iter; 1458 struct bio_vec *bv; 1459 __u64 offset; 1460 pid_t pid; 1461 unsigned int bytes; 1462 int result; 1463 struct TCP_Server_Info *server; 1464 #ifdef CONFIG_CIFS_SMB_DIRECT 1465 struct smbd_mr *mr; 1466 #endif 1467 struct cifs_credits credits; 1468 }; 1469 1470 /* 1471 * Take a reference on the file private data. Must be called with 1472 * cfile->file_info_lock held. 1473 */ 1474 static inline void 1475 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1476 { 1477 ++cifs_file->count; 1478 } 1479 1480 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1481 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1482 bool offload); 1483 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1484 1485 #define CIFS_CACHE_READ_FLG 1 1486 #define CIFS_CACHE_HANDLE_FLG 2 1487 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1488 #define CIFS_CACHE_WRITE_FLG 4 1489 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1490 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1491 1492 #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)) 1493 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1494 #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)) 1495 1496 /* 1497 * One of these for each file inode 1498 */ 1499 1500 struct cifsInodeInfo { 1501 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1502 bool can_cache_brlcks; 1503 struct list_head llist; /* locks helb by this inode */ 1504 /* 1505 * NOTE: Some code paths call down_read(lock_sem) twice, so 1506 * we must always use cifs_down_write() instead of down_write() 1507 * for this semaphore to avoid deadlocks. 1508 */ 1509 struct rw_semaphore lock_sem; /* protect the fields above */ 1510 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1511 struct list_head openFileList; 1512 spinlock_t open_file_lock; /* protects openFileList */ 1513 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1514 unsigned int oplock; /* oplock/lease level we have */ 1515 unsigned int epoch; /* used to track lease state changes */ 1516 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1517 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1518 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1519 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1520 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1521 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1522 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1523 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1524 unsigned long flags; 1525 spinlock_t writers_lock; 1526 unsigned int writers; /* Number of writers on this inode */ 1527 unsigned long time; /* jiffies of last update of inode */ 1528 u64 server_eof; /* current file size on server -- protected by i_lock */ 1529 u64 uniqueid; /* server inode number */ 1530 u64 createtime; /* creation time on server */ 1531 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1532 struct list_head deferred_closes; /* list of deferred closes */ 1533 spinlock_t deferred_lock; /* protection on deferred list */ 1534 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1535 char *symlink_target; 1536 }; 1537 1538 static inline struct cifsInodeInfo * 1539 CIFS_I(struct inode *inode) 1540 { 1541 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1542 } 1543 1544 static inline struct cifs_sb_info * 1545 CIFS_SB(struct super_block *sb) 1546 { 1547 return sb->s_fs_info; 1548 } 1549 1550 static inline struct cifs_sb_info * 1551 CIFS_FILE_SB(struct file *file) 1552 { 1553 return CIFS_SB(file_inode(file)->i_sb); 1554 } 1555 1556 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1557 { 1558 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1559 return '/'; 1560 else 1561 return '\\'; 1562 } 1563 1564 static inline void 1565 convert_delimiter(char *path, char delim) 1566 { 1567 char old_delim, *pos; 1568 1569 if (delim == '/') 1570 old_delim = '\\'; 1571 else 1572 old_delim = '/'; 1573 1574 pos = path; 1575 while ((pos = strchr(pos, old_delim))) 1576 *pos = delim; 1577 } 1578 1579 #define cifs_stats_inc atomic_inc 1580 1581 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1582 unsigned int bytes) 1583 { 1584 if (bytes) { 1585 spin_lock(&tcon->stat_lock); 1586 tcon->bytes_written += bytes; 1587 spin_unlock(&tcon->stat_lock); 1588 } 1589 } 1590 1591 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1592 unsigned int bytes) 1593 { 1594 spin_lock(&tcon->stat_lock); 1595 tcon->bytes_read += bytes; 1596 spin_unlock(&tcon->stat_lock); 1597 } 1598 1599 1600 /* 1601 * This is the prototype for the mid receive function. This function is for 1602 * receiving the rest of the SMB frame, starting with the WordCount (which is 1603 * just after the MID in struct smb_hdr). Note: 1604 * 1605 * - This will be called by cifsd, with no locks held. 1606 * - The mid will still be on the pending_mid_q. 1607 * - mid->resp_buf will point to the current buffer. 1608 * 1609 * Returns zero on a successful receive, or an error. The receive state in 1610 * the TCP_Server_Info will also be updated. 1611 */ 1612 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1613 struct mid_q_entry *mid); 1614 1615 /* 1616 * This is the prototype for the mid callback function. This is called once the 1617 * mid has been received off of the socket. When creating one, take special 1618 * care to avoid deadlocks. Things to bear in mind: 1619 * 1620 * - it will be called by cifsd, with no locks held 1621 * - the mid will be removed from any lists 1622 */ 1623 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1624 1625 /* 1626 * This is the protopyte for mid handle function. This is called once the mid 1627 * has been recognized after decryption of the message. 1628 */ 1629 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1630 struct mid_q_entry *mid); 1631 1632 /* one of these for every pending CIFS request to the server */ 1633 struct mid_q_entry { 1634 struct list_head qhead; /* mids waiting on reply from this server */ 1635 struct kref refcount; 1636 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1637 __u64 mid; /* multiplex id */ 1638 __u16 credits; /* number of credits consumed by this mid */ 1639 __u16 credits_received; /* number of credits from the response */ 1640 __u32 pid; /* process id */ 1641 __u32 sequence_number; /* for CIFS signing */ 1642 unsigned long when_alloc; /* when mid was created */ 1643 #ifdef CONFIG_CIFS_STATS2 1644 unsigned long when_sent; /* time when smb send finished */ 1645 unsigned long when_received; /* when demux complete (taken off wire) */ 1646 #endif 1647 mid_receive_t *receive; /* call receive callback */ 1648 mid_callback_t *callback; /* call completion callback */ 1649 mid_handle_t *handle; /* call handle mid callback */ 1650 void *callback_data; /* general purpose pointer for callback */ 1651 struct task_struct *creator; 1652 void *resp_buf; /* pointer to received SMB header */ 1653 unsigned int resp_buf_size; 1654 int mid_state; /* wish this were enum but can not pass to wait_event */ 1655 unsigned int mid_flags; 1656 __le16 command; /* smb command code */ 1657 unsigned int optype; /* operation type */ 1658 bool large_buf:1; /* if valid response, is pointer to large buf */ 1659 bool multiRsp:1; /* multiple trans2 responses for one request */ 1660 bool multiEnd:1; /* both received */ 1661 bool decrypted:1; /* decrypted entry */ 1662 }; 1663 1664 struct close_cancelled_open { 1665 struct cifs_fid fid; 1666 struct cifs_tcon *tcon; 1667 struct work_struct work; 1668 __u64 mid; 1669 __u16 cmd; 1670 }; 1671 1672 /* Make code in transport.c a little cleaner by moving 1673 update of optional stats into function below */ 1674 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1675 { 1676 atomic_inc(&server->in_send); 1677 } 1678 1679 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1680 { 1681 atomic_dec(&server->in_send); 1682 } 1683 1684 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1685 { 1686 atomic_inc(&server->num_waiters); 1687 } 1688 1689 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1690 { 1691 atomic_dec(&server->num_waiters); 1692 } 1693 1694 #ifdef CONFIG_CIFS_STATS2 1695 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1696 { 1697 mid->when_sent = jiffies; 1698 } 1699 #else 1700 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1701 { 1702 } 1703 #endif 1704 1705 /* for pending dnotify requests */ 1706 struct dir_notify_req { 1707 struct list_head lhead; 1708 __le16 Pid; 1709 __le16 PidHigh; 1710 __u16 Mid; 1711 __u16 Tid; 1712 __u16 Uid; 1713 __u16 netfid; 1714 __u32 filter; /* CompletionFilter (for multishot) */ 1715 int multishot; 1716 struct file *pfile; 1717 }; 1718 1719 struct dfs_info3_param { 1720 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1721 int path_consumed; 1722 int server_type; 1723 int ref_flag; 1724 char *path_name; 1725 char *node_name; 1726 int ttl; 1727 }; 1728 1729 struct file_list { 1730 struct list_head list; 1731 struct cifsFileInfo *cfile; 1732 }; 1733 1734 struct cifs_mount_ctx { 1735 struct cifs_sb_info *cifs_sb; 1736 struct smb3_fs_context *fs_ctx; 1737 unsigned int xid; 1738 struct TCP_Server_Info *server; 1739 struct cifs_ses *ses; 1740 struct cifs_tcon *tcon; 1741 struct list_head dfs_ses_list; 1742 }; 1743 1744 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1745 { 1746 kfree(param->path_name); 1747 kfree(param->node_name); 1748 } 1749 1750 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1751 { 1752 if (param) 1753 __free_dfs_info_param(param); 1754 } 1755 1756 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1757 { 1758 if (param) { 1759 __free_dfs_info_param(param); 1760 memset(param, 0, sizeof(*param)); 1761 } 1762 } 1763 1764 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1765 int number_of_items) 1766 { 1767 int i; 1768 1769 if ((number_of_items == 0) || (param == NULL)) 1770 return; 1771 for (i = 0; i < number_of_items; i++) { 1772 kfree(param[i].path_name); 1773 kfree(param[i].node_name); 1774 } 1775 kfree(param); 1776 } 1777 1778 static inline bool is_interrupt_error(int error) 1779 { 1780 switch (error) { 1781 case -EINTR: 1782 case -ERESTARTSYS: 1783 case -ERESTARTNOHAND: 1784 case -ERESTARTNOINTR: 1785 return true; 1786 } 1787 return false; 1788 } 1789 1790 static inline bool is_retryable_error(int error) 1791 { 1792 if (is_interrupt_error(error) || error == -EAGAIN) 1793 return true; 1794 return false; 1795 } 1796 1797 1798 /* cifs_get_writable_file() flags */ 1799 #define FIND_WR_ANY 0 1800 #define FIND_WR_FSUID_ONLY 1 1801 #define FIND_WR_WITH_DELETE 2 1802 1803 #define MID_FREE 0 1804 #define MID_REQUEST_ALLOCATED 1 1805 #define MID_REQUEST_SUBMITTED 2 1806 #define MID_RESPONSE_RECEIVED 4 1807 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1808 #define MID_RESPONSE_MALFORMED 0x10 1809 #define MID_SHUTDOWN 0x20 1810 1811 /* Flags */ 1812 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1813 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1814 1815 /* Types of response buffer returned from SendReceive2 */ 1816 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1817 #define CIFS_SMALL_BUFFER 1 1818 #define CIFS_LARGE_BUFFER 2 1819 #define CIFS_IOVEC 4 /* array of response buffers */ 1820 1821 /* Type of Request to SendReceive2 */ 1822 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1823 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1824 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1825 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1826 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1827 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1828 1829 /* Type of request operation */ 1830 #define CIFS_ECHO_OP 0x080 /* echo request */ 1831 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1832 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1833 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1834 /* Lower bitmask values are reserved by others below. */ 1835 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1836 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1837 1838 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1839 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1840 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1841 1842 /* Security Flags: indicate type of session setup needed */ 1843 #define CIFSSEC_MAY_SIGN 0x00001 1844 #define CIFSSEC_MAY_NTLMV2 0x00004 1845 #define CIFSSEC_MAY_KRB5 0x00008 1846 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1847 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1848 1849 #define CIFSSEC_MUST_SIGN 0x01001 1850 /* note that only one of the following can be set so the 1851 result of setting MUST flags more than once will be to 1852 require use of the stronger protocol */ 1853 #define CIFSSEC_MUST_NTLMV2 0x04004 1854 #define CIFSSEC_MUST_KRB5 0x08008 1855 #ifdef CONFIG_CIFS_UPCALL 1856 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1857 #else 1858 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1859 #endif /* UPCALL */ 1860 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1861 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1862 1863 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1864 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1865 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1866 /* 1867 ***************************************************************** 1868 * All constants go here 1869 ***************************************************************** 1870 */ 1871 1872 #define UID_HASH (16) 1873 1874 /* 1875 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1876 * following to be declared. 1877 */ 1878 1879 /**************************************************************************** 1880 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1881 * to the locking order. i.e. if two locks are to be held together, the lock that 1882 * appears higher in this list needs to be taken before the other. 1883 * 1884 * If you hold a lock that is lower in this list, and you need to take a higher lock 1885 * (or if you think that one of the functions that you're calling may need to), first 1886 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1887 * ensure that locks are picked up only in one direction in the below table 1888 * (top to bottom). 1889 * 1890 * Also, if you expect a function to be called with a lock held, explicitly document 1891 * this in the comments on top of your function definition. 1892 * 1893 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1894 * possible. Blocking / calling other functions with a lock held always increase 1895 * the risk of a possible deadlock. 1896 * 1897 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1898 * debug. Also, any new lock that you introduce, please add to this list in the correct 1899 * order. 1900 * 1901 * Please populate this list whenever you introduce new locks in your changes. Or in 1902 * case I've missed some existing locks. Please ensure that it's added in the list 1903 * based on the locking order expected. 1904 * 1905 * ===================================================================================== 1906 * Lock Protects Initialization fn 1907 * ===================================================================================== 1908 * vol_list_lock 1909 * vol_info->ctx_lock vol_info->ctx 1910 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1911 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1912 * reconnect_mutex 1913 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1914 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1915 * cifs_tcon 1916 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1917 * cifs_tcon->pending_opens 1918 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1919 * cifs_tcon->bytes_written 1920 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1921 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1922 * GlobalCurrentXid 1923 * GlobalTotalActiveXid 1924 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1925 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1926 * ->CurrentMid 1927 * (any changes in mid_q_entry fields) 1928 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1929 * ->credits 1930 * ->echo_credits 1931 * ->oplock_credits 1932 * ->reconnect_instance 1933 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1934 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1935 * ->iface_count 1936 * ->iface_last_update 1937 * cifs_ses->chan_lock cifs_ses->chans 1938 * ->chans_need_reconnect 1939 * ->chans_in_reconnect 1940 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1941 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1942 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1943 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1944 * ->can_cache_brlcks 1945 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1946 * cached_fid->fid_mutex cifs_tcon->crfid tconInfoAlloc 1947 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1948 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1949 * ->invalidHandle initiate_cifs_search 1950 * ->oplock_break_cancelled 1951 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 1952 ****************************************************************************/ 1953 1954 #ifdef DECLARE_GLOBALS_HERE 1955 #define GLOBAL_EXTERN 1956 #else 1957 #define GLOBAL_EXTERN extern 1958 #endif 1959 1960 /* 1961 * the list of TCP_Server_Info structures, ie each of the sockets 1962 * connecting our client to a distinct server (ip address), is 1963 * chained together by cifs_tcp_ses_list. The list of all our SMB 1964 * sessions (and from that the tree connections) can be found 1965 * by iterating over cifs_tcp_ses_list 1966 */ 1967 extern struct list_head cifs_tcp_ses_list; 1968 1969 /* 1970 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1971 * tcp session, and the list of tcon's per smb session. It also protects 1972 * the reference counters for the server, smb session, and tcon. 1973 * generally the locks should be taken in order tcp_ses_lock before 1974 * tcon->open_file_lock and that before file->file_info_lock since the 1975 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 1976 */ 1977 extern spinlock_t cifs_tcp_ses_lock; 1978 1979 /* 1980 * Global transaction id (XID) information 1981 */ 1982 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 1983 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 1984 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 1985 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 1986 1987 /* 1988 * Global counters, updated atomically 1989 */ 1990 extern atomic_t sesInfoAllocCount; 1991 extern atomic_t tconInfoAllocCount; 1992 extern atomic_t tcpSesNextId; 1993 extern atomic_t tcpSesAllocCount; 1994 extern atomic_t tcpSesReconnectCount; 1995 extern atomic_t tconInfoReconnectCount; 1996 1997 /* Various Debug counters */ 1998 extern atomic_t buf_alloc_count; /* current number allocated */ 1999 extern atomic_t small_buf_alloc_count; 2000 #ifdef CONFIG_CIFS_STATS2 2001 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2002 extern atomic_t total_small_buf_alloc_count; 2003 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2004 #endif 2005 2006 /* Misc globals */ 2007 extern bool enable_oplocks; /* enable or disable oplocks */ 2008 extern bool lookupCacheEnabled; 2009 extern unsigned int global_secflags; /* if on, session setup sent 2010 with more secure ntlmssp2 challenge/resp */ 2011 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2012 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2013 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2014 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2015 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2016 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2017 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2018 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2019 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2020 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2021 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2022 extern atomic_t mid_count; 2023 2024 void cifs_oplock_break(struct work_struct *work); 2025 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2026 void smb2_deferred_work_close(struct work_struct *work); 2027 2028 extern const struct slow_work_ops cifs_oplock_break_ops; 2029 extern struct workqueue_struct *cifsiod_wq; 2030 extern struct workqueue_struct *decrypt_wq; 2031 extern struct workqueue_struct *fileinfo_put_wq; 2032 extern struct workqueue_struct *cifsoplockd_wq; 2033 extern struct workqueue_struct *deferredclose_wq; 2034 extern __u32 cifs_lock_secret; 2035 2036 extern mempool_t *cifs_mid_poolp; 2037 2038 /* Operations for different SMB versions */ 2039 #define SMB1_VERSION_STRING "1.0" 2040 #define SMB20_VERSION_STRING "2.0" 2041 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2042 extern struct smb_version_operations smb1_operations; 2043 extern struct smb_version_values smb1_values; 2044 extern struct smb_version_operations smb20_operations; 2045 extern struct smb_version_values smb20_values; 2046 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2047 #define SMB21_VERSION_STRING "2.1" 2048 extern struct smb_version_operations smb21_operations; 2049 extern struct smb_version_values smb21_values; 2050 #define SMBDEFAULT_VERSION_STRING "default" 2051 extern struct smb_version_values smbdefault_values; 2052 #define SMB3ANY_VERSION_STRING "3" 2053 extern struct smb_version_values smb3any_values; 2054 #define SMB30_VERSION_STRING "3.0" 2055 extern struct smb_version_operations smb30_operations; 2056 extern struct smb_version_values smb30_values; 2057 #define SMB302_VERSION_STRING "3.02" 2058 #define ALT_SMB302_VERSION_STRING "3.0.2" 2059 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2060 extern struct smb_version_values smb302_values; 2061 #define SMB311_VERSION_STRING "3.1.1" 2062 #define ALT_SMB311_VERSION_STRING "3.11" 2063 extern struct smb_version_operations smb311_operations; 2064 extern struct smb_version_values smb311_values; 2065 2066 static inline char *get_security_type_str(enum securityEnum sectype) 2067 { 2068 switch (sectype) { 2069 case RawNTLMSSP: 2070 return "RawNTLMSSP"; 2071 case Kerberos: 2072 return "Kerberos"; 2073 case NTLMv2: 2074 return "NTLMv2"; 2075 default: 2076 return "Unknown"; 2077 } 2078 } 2079 2080 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2081 { 2082 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2083 } 2084 2085 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2086 { 2087 /* 2088 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2089 * Subsystem Notifies That a Share Is a DFS Share. 2090 * 2091 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2092 * Application Updates a Share. 2093 */ 2094 if (!tcon || !tcon->ses || !tcon->ses->server) 2095 return false; 2096 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2097 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2098 } 2099 2100 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2101 const struct dfs_info3_param *ref) 2102 { 2103 /* 2104 * Check if all targets are capable of handling DFS referrals as per 2105 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2106 */ 2107 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2108 } 2109 2110 static inline u64 cifs_flock_len(const struct file_lock *fl) 2111 { 2112 return (u64)fl->fl_end - fl->fl_start + 1; 2113 } 2114 2115 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2116 { 2117 if (WARN_ON_ONCE(!ses || !ses->server)) 2118 return 0; 2119 /* 2120 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2121 * servers do require it during NTLMSSP. 2122 */ 2123 if (ses->server->dialect <= SMB20_PROT_ID) 2124 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2125 return sizeof(ses->workstation_name); 2126 } 2127 2128 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2129 { 2130 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2131 dst->AccessFlags = src->AccessFlags; 2132 dst->CurrentByteOffset = src->CurrentByteOffset; 2133 dst->Mode = src->Mode; 2134 dst->AlignmentRequirement = src->AlignmentRequirement; 2135 dst->FileNameLength = src->FileNameLength; 2136 } 2137 2138 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2139 int num_rqst, 2140 const u8 *sig) 2141 { 2142 unsigned int len, skip; 2143 unsigned int nents = 0; 2144 unsigned long addr; 2145 int i, j; 2146 2147 /* 2148 * The first rqst has a transform header where the first 20 bytes are 2149 * not part of the encrypted blob. 2150 */ 2151 skip = 20; 2152 2153 /* Assumes the first rqst has a transform header as the first iov. 2154 * I.e. 2155 * rqst[0].rq_iov[0] is transform header 2156 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2157 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2158 */ 2159 for (i = 0; i < num_rqst; i++) { 2160 /* We really don't want a mixture of pinned and unpinned pages 2161 * in the sglist. It's hard to keep track of which is what. 2162 * Instead, we convert to a BVEC-type iterator higher up. 2163 */ 2164 if (WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2165 return -EIO; 2166 2167 /* We also don't want to have any extra refs or pins to clean 2168 * up in the sglist. 2169 */ 2170 if (WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2171 return -EIO; 2172 2173 for (j = 0; j < rqst[i].rq_nvec; j++) { 2174 struct kvec *iov = &rqst[i].rq_iov[j]; 2175 2176 addr = (unsigned long)iov->iov_base + skip; 2177 if (unlikely(is_vmalloc_addr((void *)addr))) { 2178 len = iov->iov_len - skip; 2179 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2180 PAGE_SIZE); 2181 } else { 2182 nents++; 2183 } 2184 skip = 0; 2185 } 2186 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2187 } 2188 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2189 return nents; 2190 } 2191 2192 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2193 * stack object as buf. 2194 */ 2195 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2196 const void *buf, 2197 unsigned int buflen) 2198 { 2199 unsigned long addr = (unsigned long)buf; 2200 unsigned int off = offset_in_page(addr); 2201 2202 addr &= PAGE_MASK; 2203 if (unlikely(is_vmalloc_addr((void *)addr))) { 2204 do { 2205 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2206 2207 sg_set_page(&sgtable->sgl[sgtable->nents++], 2208 vmalloc_to_page((void *)addr), len, off); 2209 2210 off = 0; 2211 addr += PAGE_SIZE; 2212 buflen -= len; 2213 } while (buflen); 2214 } else { 2215 sg_set_page(&sgtable->sgl[sgtable->nents++], 2216 virt_to_page((void *)addr), buflen, off); 2217 } 2218 } 2219 2220 struct smb2_compound_vars { 2221 struct cifs_open_parms oparms; 2222 struct kvec rsp_iov[3]; 2223 struct smb_rqst rqst[3]; 2224 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2225 struct kvec qi_iov; 2226 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2227 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2228 struct kvec close_iov; 2229 struct smb2_file_rename_info rename_info; 2230 struct smb2_file_link_info link_info; 2231 }; 2232 2233 #endif /* _CIFS_GLOB_H */ 2234