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 bool terminate; 654 unsigned int credits; /* send no more requests at once */ 655 unsigned int max_credits; /* can override large 32000 default at mnt */ 656 unsigned int in_flight; /* number of requests on the wire to server */ 657 unsigned int max_in_flight; /* max number of requests that were on wire */ 658 spinlock_t req_lock; /* protect the two values above */ 659 struct mutex _srv_mutex; 660 unsigned int nofs_flag; 661 struct task_struct *tsk; 662 char server_GUID[16]; 663 __u16 sec_mode; 664 bool sign; /* is signing enabled on this connection? */ 665 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 666 bool session_estab; /* mark when very first sess is established */ 667 int echo_credits; /* echo reserved slots */ 668 int oplock_credits; /* oplock break reserved slots */ 669 bool echoes:1; /* enable echoes */ 670 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 671 u16 dialect; /* dialect index that server chose */ 672 bool oplocks:1; /* enable oplocks */ 673 unsigned int maxReq; /* Clients should submit no more */ 674 /* than maxReq distinct unanswered SMBs to the server when using */ 675 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 676 unsigned int maxBuf; /* maxBuf specifies the maximum */ 677 /* message size the server can send or receive for non-raw SMBs */ 678 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 679 /* when socket is setup (and during reconnect) before NegProt sent */ 680 unsigned int max_rw; /* maxRw specifies the maximum */ 681 /* message size the server can send or receive for */ 682 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 683 unsigned int capabilities; /* selective disabling of caps by smb sess */ 684 int timeAdj; /* Adjust for difference in server time zone in sec */ 685 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 686 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 687 /* 16th byte of RFC1001 workstation name is always null */ 688 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 689 __u32 sequence_number; /* for signing, protected by srv_mutex */ 690 __u32 reconnect_instance; /* incremented on each reconnect */ 691 struct session_key session_key; 692 unsigned long lstrp; /* when we got last response from this server */ 693 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 694 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 695 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 696 char negflavor; /* NEGOTIATE response flavor */ 697 /* extended security flavors that server supports */ 698 bool sec_ntlmssp; /* supports NTLMSSP */ 699 bool sec_kerberosu2u; /* supports U2U Kerberos */ 700 bool sec_kerberos; /* supports plain Kerberos */ 701 bool sec_mskerberos; /* supports legacy MS Kerberos */ 702 bool large_buf; /* is current buffer large? */ 703 /* use SMBD connection instead of socket */ 704 bool rdma; 705 /* point to the SMBD connection if RDMA is used instead of socket */ 706 struct smbd_connection *smbd_conn; 707 struct delayed_work echo; /* echo ping workqueue job */ 708 char *smallbuf; /* pointer to current "small" buffer */ 709 char *bigbuf; /* pointer to current "big" buffer */ 710 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 711 unsigned int pdu_size; 712 unsigned int total_read; /* total amount of data read in this pass */ 713 atomic_t in_send; /* requests trying to send */ 714 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 715 #ifdef CONFIG_CIFS_STATS2 716 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 717 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 718 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 719 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 720 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 721 #endif /* STATS2 */ 722 unsigned int max_read; 723 unsigned int max_write; 724 unsigned int min_offload; 725 __le16 compress_algorithm; 726 __u16 signing_algorithm; 727 __le16 cipher_type; 728 /* save initital negprot hash */ 729 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 730 bool signing_negotiated; /* true if valid signing context rcvd from server */ 731 bool posix_ext_supported; 732 struct delayed_work reconnect; /* reconnect workqueue job */ 733 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 734 unsigned long echo_interval; 735 736 /* 737 * Number of targets available for reconnect. The more targets 738 * the more tasks have to wait to let the demultiplex thread 739 * reconnect. 740 */ 741 int nr_targets; 742 bool noblockcnt; /* use non-blocking connect() */ 743 744 /* 745 * If this is a session channel, 746 * primary_server holds the ref-counted 747 * pointer to primary channel connection for the session. 748 */ 749 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 750 struct TCP_Server_Info *primary_server; 751 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 752 753 #ifdef CONFIG_CIFS_SWN_UPCALL 754 bool use_swn_dstaddr; 755 struct sockaddr_storage swn_dstaddr; 756 #endif 757 struct mutex refpath_lock; /* protects leaf_fullpath */ 758 /* 759 * leaf_fullpath: Canonical DFS referral path related to this 760 * connection. 761 * It is used in DFS cache refresher, reconnect and may 762 * change due to nested DFS links. 763 * 764 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 765 * mostly used for not requiring a copy of @leaf_fullpath when getting 766 * cached or new DFS referrals (which might also sleep during I/O). 767 * While @srv_lock is held for making string and NULL comparions against 768 * both fields as in mount(2) and cache refresh. 769 * 770 * format: \\HOST\SHARE[\OPTIONAL PATH] 771 */ 772 char *leaf_fullpath; 773 }; 774 775 static inline bool is_smb1(struct TCP_Server_Info *server) 776 { 777 return HEADER_PREAMBLE_SIZE(server) != 0; 778 } 779 780 static inline void cifs_server_lock(struct TCP_Server_Info *server) 781 { 782 unsigned int nofs_flag = memalloc_nofs_save(); 783 784 mutex_lock(&server->_srv_mutex); 785 server->nofs_flag = nofs_flag; 786 } 787 788 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 789 { 790 unsigned int nofs_flag = server->nofs_flag; 791 792 mutex_unlock(&server->_srv_mutex); 793 memalloc_nofs_restore(nofs_flag); 794 } 795 796 struct cifs_credits { 797 unsigned int value; 798 unsigned int instance; 799 }; 800 801 static inline unsigned int 802 in_flight(struct TCP_Server_Info *server) 803 { 804 unsigned int num; 805 806 spin_lock(&server->req_lock); 807 num = server->in_flight; 808 spin_unlock(&server->req_lock); 809 return num; 810 } 811 812 static inline bool 813 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 814 { 815 int num; 816 817 spin_lock(&server->req_lock); 818 num = *credits; 819 spin_unlock(&server->req_lock); 820 return num >= num_credits; 821 } 822 823 static inline void 824 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 825 const int optype) 826 { 827 server->ops->add_credits(server, credits, optype); 828 } 829 830 static inline void 831 add_credits_and_wake_if(struct TCP_Server_Info *server, 832 const struct cifs_credits *credits, const int optype) 833 { 834 if (credits->value) { 835 server->ops->add_credits(server, credits, optype); 836 wake_up(&server->request_q); 837 } 838 } 839 840 static inline void 841 set_credits(struct TCP_Server_Info *server, const int val) 842 { 843 server->ops->set_credits(server, val); 844 } 845 846 static inline int 847 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 848 const unsigned int payload_size) 849 { 850 return server->ops->adjust_credits ? 851 server->ops->adjust_credits(server, credits, payload_size) : 0; 852 } 853 854 static inline __le64 855 get_next_mid64(struct TCP_Server_Info *server) 856 { 857 return cpu_to_le64(server->ops->get_next_mid(server)); 858 } 859 860 static inline __le16 861 get_next_mid(struct TCP_Server_Info *server) 862 { 863 __u16 mid = server->ops->get_next_mid(server); 864 /* 865 * The value in the SMB header should be little endian for easy 866 * on-the-wire decoding. 867 */ 868 return cpu_to_le16(mid); 869 } 870 871 static inline void 872 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 873 { 874 if (server->ops->revert_current_mid) 875 server->ops->revert_current_mid(server, val); 876 } 877 878 static inline void 879 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 880 const struct smb2_hdr *shdr) 881 { 882 unsigned int num = le16_to_cpu(shdr->CreditCharge); 883 884 return revert_current_mid(server, num > 0 ? num : 1); 885 } 886 887 static inline __u16 888 get_mid(const struct smb_hdr *smb) 889 { 890 return le16_to_cpu(smb->Mid); 891 } 892 893 static inline bool 894 compare_mid(__u16 mid, const struct smb_hdr *smb) 895 { 896 return mid == le16_to_cpu(smb->Mid); 897 } 898 899 /* 900 * When the server supports very large reads and writes via POSIX extensions, 901 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 902 * including the RFC1001 length. 903 * 904 * Note that this might make for "interesting" allocation problems during 905 * writeback however as we have to allocate an array of pointers for the 906 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 907 * 908 * For reads, there is a similar problem as we need to allocate an array 909 * of kvecs to handle the receive, though that should only need to be done 910 * once. 911 */ 912 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 913 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 914 915 /* 916 * When the server doesn't allow large posix writes, only allow a rsize/wsize 917 * of 2^17-1 minus the size of the call header. That allows for a read or 918 * write up to the maximum size described by RFC1002. 919 */ 920 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 921 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 922 923 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 924 925 /* 926 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 927 * those values when posix extensions aren't in force. In actuality here, we 928 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 929 * to be ok with the extra byte even though Windows doesn't send writes that 930 * are that large. 931 * 932 * Citation: 933 * 934 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 935 */ 936 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 937 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 938 939 /* 940 * Macros to allow the TCP_Server_Info->net field and related code to drop out 941 * when CONFIG_NET_NS isn't set. 942 */ 943 944 #ifdef CONFIG_NET_NS 945 946 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 947 { 948 return srv->net; 949 } 950 951 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 952 { 953 srv->net = net; 954 } 955 956 #else 957 958 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 959 { 960 return &init_net; 961 } 962 963 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 964 { 965 } 966 967 #endif 968 969 struct cifs_server_iface { 970 struct list_head iface_head; 971 struct kref refcount; 972 size_t speed; 973 size_t weight_fulfilled; 974 unsigned int num_channels; 975 unsigned int rdma_capable : 1; 976 unsigned int rss_capable : 1; 977 unsigned int is_active : 1; /* unset if non existent */ 978 struct sockaddr_storage sockaddr; 979 }; 980 981 /* release iface when last ref is dropped */ 982 static inline void 983 release_iface(struct kref *ref) 984 { 985 struct cifs_server_iface *iface = container_of(ref, 986 struct cifs_server_iface, 987 refcount); 988 list_del_init(&iface->iface_head); 989 kfree(iface); 990 } 991 992 struct cifs_chan { 993 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 994 struct TCP_Server_Info *server; 995 struct cifs_server_iface *iface; /* interface in use */ 996 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 997 }; 998 999 /* 1000 * Session structure. One of these for each uid session with a particular host 1001 */ 1002 struct cifs_ses { 1003 struct list_head smb_ses_list; 1004 struct list_head rlist; /* reconnect list */ 1005 struct list_head tcon_list; 1006 struct cifs_tcon *tcon_ipc; 1007 spinlock_t ses_lock; /* protect anything here that is not protected */ 1008 struct mutex session_mutex; 1009 struct TCP_Server_Info *server; /* pointer to server info */ 1010 int ses_count; /* reference counter */ 1011 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1012 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1013 char *serverOS; /* name of operating system underlying server */ 1014 char *serverNOS; /* name of network operating system of server */ 1015 char *serverDomain; /* security realm of server */ 1016 __u64 Suid; /* remote smb uid */ 1017 kuid_t linux_uid; /* overriding owner of files on the mount */ 1018 kuid_t cred_uid; /* owner of credentials */ 1019 unsigned int capabilities; 1020 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1021 char *user_name; /* must not be null except during init of sess 1022 and after mount option parsing we fill it */ 1023 char *domainName; 1024 char *password; 1025 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1026 struct session_key auth_key; 1027 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1028 enum securityEnum sectype; /* what security flavor was specified? */ 1029 bool sign; /* is signing required? */ 1030 bool domainAuto:1; 1031 __u16 session_flags; 1032 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1033 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1034 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1035 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1036 1037 /* 1038 * Network interfaces available on the server this session is 1039 * connected to. 1040 * 1041 * Other channels can be opened by connecting and binding this 1042 * session to interfaces from this list. 1043 * 1044 * iface_lock should be taken when accessing any of these fields 1045 */ 1046 spinlock_t iface_lock; 1047 /* ========= begin: protected by iface_lock ======== */ 1048 struct list_head iface_list; 1049 size_t iface_count; 1050 unsigned long iface_last_update; /* jiffies */ 1051 /* ========= end: protected by iface_lock ======== */ 1052 1053 spinlock_t chan_lock; 1054 /* ========= begin: protected by chan_lock ======== */ 1055 #define CIFS_MAX_CHANNELS 16 1056 #define CIFS_INVAL_CHAN_INDEX (-1) 1057 #define CIFS_ALL_CHANNELS_SET(ses) \ 1058 ((1UL << (ses)->chan_count) - 1) 1059 #define CIFS_ALL_CHANS_GOOD(ses) \ 1060 (!(ses)->chans_need_reconnect) 1061 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1062 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1063 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1064 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1065 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1066 test_bit((index), &(ses)->chans_need_reconnect) 1067 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1068 ((ses)->chans[(index)].in_reconnect) 1069 1070 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1071 size_t chan_count; 1072 size_t chan_max; 1073 atomic_t chan_seq; /* round robin state */ 1074 1075 /* 1076 * chans_need_reconnect is a bitmap indicating which of the channels 1077 * under this smb session needs to be reconnected. 1078 * If not multichannel session, only one bit will be used. 1079 * 1080 * We will ask for sess and tcon reconnection only if all the 1081 * channels are marked for needing reconnection. This will 1082 * enable the sessions on top to continue to live till any 1083 * of the channels below are active. 1084 */ 1085 unsigned long chans_need_reconnect; 1086 /* ========= end: protected by chan_lock ======== */ 1087 struct cifs_ses *dfs_root_ses; 1088 struct nls_table *local_nls; 1089 }; 1090 1091 static inline bool 1092 cap_unix(struct cifs_ses *ses) 1093 { 1094 return ses->server->vals->cap_unix & ses->capabilities; 1095 } 1096 1097 /* 1098 * common struct for holding inode info when searching for or updating an 1099 * inode with new info 1100 */ 1101 1102 #define CIFS_FATTR_JUNCTION 0x1 1103 #define CIFS_FATTR_DELETE_PENDING 0x2 1104 #define CIFS_FATTR_NEED_REVAL 0x4 1105 #define CIFS_FATTR_INO_COLLISION 0x8 1106 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1107 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1108 1109 struct cifs_fattr { 1110 u32 cf_flags; 1111 u32 cf_cifsattrs; 1112 u64 cf_uniqueid; 1113 u64 cf_eof; 1114 u64 cf_bytes; 1115 u64 cf_createtime; 1116 kuid_t cf_uid; 1117 kgid_t cf_gid; 1118 umode_t cf_mode; 1119 dev_t cf_rdev; 1120 unsigned int cf_nlink; 1121 unsigned int cf_dtype; 1122 struct timespec64 cf_atime; 1123 struct timespec64 cf_mtime; 1124 struct timespec64 cf_ctime; 1125 u32 cf_cifstag; 1126 char *cf_symlink_target; 1127 }; 1128 1129 /* 1130 * there is one of these for each connection to a resource on a particular 1131 * session 1132 */ 1133 struct cifs_tcon { 1134 struct list_head tcon_list; 1135 int tc_count; 1136 struct list_head rlist; /* reconnect list */ 1137 spinlock_t tc_lock; /* protect anything here that is not protected */ 1138 atomic_t num_local_opens; /* num of all opens including disconnected */ 1139 atomic_t num_remote_opens; /* num of all network opens on server */ 1140 struct list_head openFileList; 1141 spinlock_t open_file_lock; /* protects list above */ 1142 struct cifs_ses *ses; /* pointer to session associated with */ 1143 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1144 char *nativeFileSystem; 1145 char *password; /* for share-level security */ 1146 __u32 tid; /* The 4 byte tree id */ 1147 __u16 Flags; /* optional support bits */ 1148 enum tid_status_enum status; 1149 atomic_t num_smbs_sent; 1150 union { 1151 struct { 1152 atomic_t num_writes; 1153 atomic_t num_reads; 1154 atomic_t num_flushes; 1155 atomic_t num_oplock_brks; 1156 atomic_t num_opens; 1157 atomic_t num_closes; 1158 atomic_t num_deletes; 1159 atomic_t num_mkdirs; 1160 atomic_t num_posixopens; 1161 atomic_t num_posixmkdirs; 1162 atomic_t num_rmdirs; 1163 atomic_t num_renames; 1164 atomic_t num_t2renames; 1165 atomic_t num_ffirst; 1166 atomic_t num_fnext; 1167 atomic_t num_fclose; 1168 atomic_t num_hardlinks; 1169 atomic_t num_symlinks; 1170 atomic_t num_locks; 1171 atomic_t num_acl_get; 1172 atomic_t num_acl_set; 1173 } cifs_stats; 1174 struct { 1175 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1176 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1177 } smb2_stats; 1178 } stats; 1179 __u64 bytes_read; 1180 __u64 bytes_written; 1181 spinlock_t stat_lock; /* protects the two fields above */ 1182 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1183 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1184 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1185 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1186 bool pipe:1; /* set if connection to pipe share */ 1187 bool print:1; /* set if connection to printer share */ 1188 bool retry:1; 1189 bool nocase:1; 1190 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1191 bool nodelete:1; 1192 bool seal:1; /* transport encryption for this mounted share */ 1193 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1194 for this mount even if server would support */ 1195 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1196 bool local_lease:1; /* check leases (only) on local system not remote */ 1197 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1198 bool broken_sparse_sup; /* if server or share does not support sparse */ 1199 bool need_reconnect:1; /* connection reset, tid now invalid */ 1200 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1201 bool use_resilient:1; /* use resilient instead of durable handles */ 1202 bool use_persistent:1; /* use persistent instead of durable handles */ 1203 bool no_lease:1; /* Do not request leases on files or directories */ 1204 bool use_witness:1; /* use witness protocol */ 1205 __le32 capabilities; 1206 __u32 share_flags; 1207 __u32 maximal_access; 1208 __u32 vol_serial_number; 1209 __le64 vol_create_time; 1210 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1211 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1212 __u32 ss_flags; /* sector size flags */ 1213 __u32 perf_sector_size; /* best sector size for perf */ 1214 __u32 max_chunks; 1215 __u32 max_bytes_chunk; 1216 __u32 max_bytes_copy; 1217 __u32 max_cached_dirs; 1218 #ifdef CONFIG_CIFS_FSCACHE 1219 u64 resource_id; /* server resource id */ 1220 struct fscache_volume *fscache; /* cookie for share */ 1221 #endif 1222 struct list_head pending_opens; /* list of incomplete opens */ 1223 struct cached_fids *cfids; 1224 /* BB add field for back pointer to sb struct(s)? */ 1225 #ifdef CONFIG_CIFS_DFS_UPCALL 1226 struct list_head dfs_ses_list; 1227 struct delayed_work dfs_cache_work; 1228 #endif 1229 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1230 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1231 }; 1232 1233 /* 1234 * This is a refcounted and timestamped container for a tcon pointer. The 1235 * container holds a tcon reference. It is considered safe to free one of 1236 * these when the tl_count goes to 0. The tl_time is the time of the last 1237 * "get" on the container. 1238 */ 1239 struct tcon_link { 1240 struct rb_node tl_rbnode; 1241 kuid_t tl_uid; 1242 unsigned long tl_flags; 1243 #define TCON_LINK_MASTER 0 1244 #define TCON_LINK_PENDING 1 1245 #define TCON_LINK_IN_TREE 2 1246 unsigned long tl_time; 1247 atomic_t tl_count; 1248 struct cifs_tcon *tl_tcon; 1249 }; 1250 1251 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1252 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1253 1254 static inline struct cifs_tcon * 1255 tlink_tcon(struct tcon_link *tlink) 1256 { 1257 return tlink->tl_tcon; 1258 } 1259 1260 static inline struct tcon_link * 1261 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1262 { 1263 return cifs_sb->master_tlink; 1264 } 1265 1266 extern void cifs_put_tlink(struct tcon_link *tlink); 1267 1268 static inline struct tcon_link * 1269 cifs_get_tlink(struct tcon_link *tlink) 1270 { 1271 if (tlink && !IS_ERR(tlink)) 1272 atomic_inc(&tlink->tl_count); 1273 return tlink; 1274 } 1275 1276 /* This function is always expected to succeed */ 1277 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1278 1279 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1280 1281 struct cifs_pending_open { 1282 struct list_head olist; 1283 struct tcon_link *tlink; 1284 __u8 lease_key[16]; 1285 __u32 oplock; 1286 }; 1287 1288 struct cifs_deferred_close { 1289 struct list_head dlist; 1290 struct tcon_link *tlink; 1291 __u16 netfid; 1292 __u64 persistent_fid; 1293 __u64 volatile_fid; 1294 }; 1295 1296 /* 1297 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1298 * This is used to track byte stream locks on the file 1299 */ 1300 struct cifsLockInfo { 1301 struct list_head llist; /* pointer to next cifsLockInfo */ 1302 struct list_head blist; /* pointer to locks blocked on this */ 1303 wait_queue_head_t block_q; 1304 __u64 offset; 1305 __u64 length; 1306 __u32 pid; 1307 __u16 type; 1308 __u16 flags; 1309 }; 1310 1311 /* 1312 * One of these for each open instance of a file 1313 */ 1314 struct cifs_search_info { 1315 loff_t index_of_last_entry; 1316 __u16 entries_in_buffer; 1317 __u16 info_level; 1318 __u32 resume_key; 1319 char *ntwrk_buf_start; 1320 char *srch_entries_start; 1321 char *last_entry; 1322 const char *presume_name; 1323 unsigned int resume_name_len; 1324 bool endOfSearch:1; 1325 bool emptyDir:1; 1326 bool unicode:1; 1327 bool smallBuf:1; /* so we know which buf_release function to call */ 1328 }; 1329 1330 #define ACL_NO_MODE ((umode_t)(-1)) 1331 struct cifs_open_parms { 1332 struct cifs_tcon *tcon; 1333 struct cifs_sb_info *cifs_sb; 1334 int disposition; 1335 int desired_access; 1336 int create_options; 1337 const char *path; 1338 struct cifs_fid *fid; 1339 umode_t mode; 1340 bool reconnect:1; 1341 }; 1342 1343 struct cifs_fid { 1344 __u16 netfid; 1345 __u64 persistent_fid; /* persist file id for smb2 */ 1346 __u64 volatile_fid; /* volatile file id for smb2 */ 1347 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1348 __u8 create_guid[16]; 1349 __u32 access; 1350 struct cifs_pending_open *pending_open; 1351 unsigned int epoch; 1352 #ifdef CONFIG_CIFS_DEBUG2 1353 __u64 mid; 1354 #endif /* CIFS_DEBUG2 */ 1355 bool purge_cache; 1356 }; 1357 1358 struct cifs_fid_locks { 1359 struct list_head llist; 1360 struct cifsFileInfo *cfile; /* fid that owns locks */ 1361 struct list_head locks; /* locks held by fid above */ 1362 }; 1363 1364 struct cifsFileInfo { 1365 /* following two lists are protected by tcon->open_file_lock */ 1366 struct list_head tlist; /* pointer to next fid owned by tcon */ 1367 struct list_head flist; /* next fid (file instance) for this inode */ 1368 /* lock list below protected by cifsi->lock_sem */ 1369 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1370 kuid_t uid; /* allows finding which FileInfo structure */ 1371 __u32 pid; /* process id who opened file */ 1372 struct cifs_fid fid; /* file id from remote */ 1373 struct list_head rlist; /* reconnect list */ 1374 /* BB add lock scope info here if needed */ 1375 /* lock scope id (0 if none) */ 1376 struct dentry *dentry; 1377 struct tcon_link *tlink; 1378 unsigned int f_flags; 1379 bool invalidHandle:1; /* file closed via session abend */ 1380 bool swapfile:1; 1381 bool oplock_break_cancelled:1; 1382 unsigned int oplock_epoch; /* epoch from the lease break */ 1383 __u32 oplock_level; /* oplock/lease level from the lease break */ 1384 int count; 1385 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1386 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1387 struct cifs_search_info srch_inf; 1388 struct work_struct oplock_break; /* work for oplock breaks */ 1389 struct work_struct put; /* work for the final part of _put */ 1390 struct delayed_work deferred; 1391 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1392 char *symlink_target; 1393 }; 1394 1395 struct cifs_io_parms { 1396 __u16 netfid; 1397 __u64 persistent_fid; /* persist file id for smb2 */ 1398 __u64 volatile_fid; /* volatile file id for smb2 */ 1399 __u32 pid; 1400 __u64 offset; 1401 unsigned int length; 1402 struct cifs_tcon *tcon; 1403 struct TCP_Server_Info *server; 1404 }; 1405 1406 struct cifs_aio_ctx { 1407 struct kref refcount; 1408 struct list_head list; 1409 struct mutex aio_mutex; 1410 struct completion done; 1411 struct iov_iter iter; 1412 struct kiocb *iocb; 1413 struct cifsFileInfo *cfile; 1414 struct bio_vec *bv; 1415 loff_t pos; 1416 unsigned int nr_pinned_pages; 1417 ssize_t rc; 1418 unsigned int len; 1419 unsigned int total_len; 1420 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1421 bool should_dirty; 1422 /* 1423 * Indicates if this aio_ctx is for direct_io, 1424 * If yes, iter is a copy of the user passed iov_iter 1425 */ 1426 bool direct_io; 1427 }; 1428 1429 /* asynchronous read support */ 1430 struct cifs_readdata { 1431 struct kref refcount; 1432 struct list_head list; 1433 struct completion done; 1434 struct cifsFileInfo *cfile; 1435 struct address_space *mapping; 1436 struct cifs_aio_ctx *ctx; 1437 __u64 offset; 1438 ssize_t got_bytes; 1439 unsigned int bytes; 1440 pid_t pid; 1441 int result; 1442 struct work_struct work; 1443 struct iov_iter iter; 1444 struct kvec iov[2]; 1445 struct TCP_Server_Info *server; 1446 #ifdef CONFIG_CIFS_SMB_DIRECT 1447 struct smbd_mr *mr; 1448 #endif 1449 struct cifs_credits credits; 1450 }; 1451 1452 /* asynchronous write support */ 1453 struct cifs_writedata { 1454 struct kref refcount; 1455 struct list_head list; 1456 struct completion done; 1457 enum writeback_sync_modes sync_mode; 1458 struct work_struct work; 1459 struct cifsFileInfo *cfile; 1460 struct cifs_aio_ctx *ctx; 1461 struct iov_iter iter; 1462 struct bio_vec *bv; 1463 __u64 offset; 1464 pid_t pid; 1465 unsigned int bytes; 1466 int result; 1467 struct TCP_Server_Info *server; 1468 #ifdef CONFIG_CIFS_SMB_DIRECT 1469 struct smbd_mr *mr; 1470 #endif 1471 struct cifs_credits credits; 1472 }; 1473 1474 /* 1475 * Take a reference on the file private data. Must be called with 1476 * cfile->file_info_lock held. 1477 */ 1478 static inline void 1479 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1480 { 1481 ++cifs_file->count; 1482 } 1483 1484 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1485 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1486 bool offload); 1487 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1488 1489 #define CIFS_CACHE_READ_FLG 1 1490 #define CIFS_CACHE_HANDLE_FLG 2 1491 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1492 #define CIFS_CACHE_WRITE_FLG 4 1493 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1494 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1495 1496 #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)) 1497 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1498 #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)) 1499 1500 /* 1501 * One of these for each file inode 1502 */ 1503 1504 struct cifsInodeInfo { 1505 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1506 bool can_cache_brlcks; 1507 struct list_head llist; /* locks helb by this inode */ 1508 /* 1509 * NOTE: Some code paths call down_read(lock_sem) twice, so 1510 * we must always use cifs_down_write() instead of down_write() 1511 * for this semaphore to avoid deadlocks. 1512 */ 1513 struct rw_semaphore lock_sem; /* protect the fields above */ 1514 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1515 struct list_head openFileList; 1516 spinlock_t open_file_lock; /* protects openFileList */ 1517 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1518 unsigned int oplock; /* oplock/lease level we have */ 1519 unsigned int epoch; /* used to track lease state changes */ 1520 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1521 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1522 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1523 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1524 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1525 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1526 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1527 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1528 unsigned long flags; 1529 spinlock_t writers_lock; 1530 unsigned int writers; /* Number of writers on this inode */ 1531 unsigned long time; /* jiffies of last update of inode */ 1532 u64 server_eof; /* current file size on server -- protected by i_lock */ 1533 u64 uniqueid; /* server inode number */ 1534 u64 createtime; /* creation time on server */ 1535 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1536 struct list_head deferred_closes; /* list of deferred closes */ 1537 spinlock_t deferred_lock; /* protection on deferred list */ 1538 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1539 char *symlink_target; 1540 }; 1541 1542 static inline struct cifsInodeInfo * 1543 CIFS_I(struct inode *inode) 1544 { 1545 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1546 } 1547 1548 static inline struct cifs_sb_info * 1549 CIFS_SB(struct super_block *sb) 1550 { 1551 return sb->s_fs_info; 1552 } 1553 1554 static inline struct cifs_sb_info * 1555 CIFS_FILE_SB(struct file *file) 1556 { 1557 return CIFS_SB(file_inode(file)->i_sb); 1558 } 1559 1560 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1561 { 1562 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1563 return '/'; 1564 else 1565 return '\\'; 1566 } 1567 1568 static inline void 1569 convert_delimiter(char *path, char delim) 1570 { 1571 char old_delim, *pos; 1572 1573 if (delim == '/') 1574 old_delim = '\\'; 1575 else 1576 old_delim = '/'; 1577 1578 pos = path; 1579 while ((pos = strchr(pos, old_delim))) 1580 *pos = delim; 1581 } 1582 1583 #define cifs_stats_inc atomic_inc 1584 1585 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1586 unsigned int bytes) 1587 { 1588 if (bytes) { 1589 spin_lock(&tcon->stat_lock); 1590 tcon->bytes_written += bytes; 1591 spin_unlock(&tcon->stat_lock); 1592 } 1593 } 1594 1595 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1596 unsigned int bytes) 1597 { 1598 spin_lock(&tcon->stat_lock); 1599 tcon->bytes_read += bytes; 1600 spin_unlock(&tcon->stat_lock); 1601 } 1602 1603 1604 /* 1605 * This is the prototype for the mid receive function. This function is for 1606 * receiving the rest of the SMB frame, starting with the WordCount (which is 1607 * just after the MID in struct smb_hdr). Note: 1608 * 1609 * - This will be called by cifsd, with no locks held. 1610 * - The mid will still be on the pending_mid_q. 1611 * - mid->resp_buf will point to the current buffer. 1612 * 1613 * Returns zero on a successful receive, or an error. The receive state in 1614 * the TCP_Server_Info will also be updated. 1615 */ 1616 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1617 struct mid_q_entry *mid); 1618 1619 /* 1620 * This is the prototype for the mid callback function. This is called once the 1621 * mid has been received off of the socket. When creating one, take special 1622 * care to avoid deadlocks. Things to bear in mind: 1623 * 1624 * - it will be called by cifsd, with no locks held 1625 * - the mid will be removed from any lists 1626 */ 1627 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1628 1629 /* 1630 * This is the protopyte for mid handle function. This is called once the mid 1631 * has been recognized after decryption of the message. 1632 */ 1633 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1634 struct mid_q_entry *mid); 1635 1636 /* one of these for every pending CIFS request to the server */ 1637 struct mid_q_entry { 1638 struct list_head qhead; /* mids waiting on reply from this server */ 1639 struct kref refcount; 1640 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1641 __u64 mid; /* multiplex id */ 1642 __u16 credits; /* number of credits consumed by this mid */ 1643 __u16 credits_received; /* number of credits from the response */ 1644 __u32 pid; /* process id */ 1645 __u32 sequence_number; /* for CIFS signing */ 1646 unsigned long when_alloc; /* when mid was created */ 1647 #ifdef CONFIG_CIFS_STATS2 1648 unsigned long when_sent; /* time when smb send finished */ 1649 unsigned long when_received; /* when demux complete (taken off wire) */ 1650 #endif 1651 mid_receive_t *receive; /* call receive callback */ 1652 mid_callback_t *callback; /* call completion callback */ 1653 mid_handle_t *handle; /* call handle mid callback */ 1654 void *callback_data; /* general purpose pointer for callback */ 1655 struct task_struct *creator; 1656 void *resp_buf; /* pointer to received SMB header */ 1657 unsigned int resp_buf_size; 1658 int mid_state; /* wish this were enum but can not pass to wait_event */ 1659 unsigned int mid_flags; 1660 __le16 command; /* smb command code */ 1661 unsigned int optype; /* operation type */ 1662 bool large_buf:1; /* if valid response, is pointer to large buf */ 1663 bool multiRsp:1; /* multiple trans2 responses for one request */ 1664 bool multiEnd:1; /* both received */ 1665 bool decrypted:1; /* decrypted entry */ 1666 }; 1667 1668 struct close_cancelled_open { 1669 struct cifs_fid fid; 1670 struct cifs_tcon *tcon; 1671 struct work_struct work; 1672 __u64 mid; 1673 __u16 cmd; 1674 }; 1675 1676 /* Make code in transport.c a little cleaner by moving 1677 update of optional stats into function below */ 1678 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1679 { 1680 atomic_inc(&server->in_send); 1681 } 1682 1683 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1684 { 1685 atomic_dec(&server->in_send); 1686 } 1687 1688 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1689 { 1690 atomic_inc(&server->num_waiters); 1691 } 1692 1693 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1694 { 1695 atomic_dec(&server->num_waiters); 1696 } 1697 1698 #ifdef CONFIG_CIFS_STATS2 1699 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1700 { 1701 mid->when_sent = jiffies; 1702 } 1703 #else 1704 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1705 { 1706 } 1707 #endif 1708 1709 /* for pending dnotify requests */ 1710 struct dir_notify_req { 1711 struct list_head lhead; 1712 __le16 Pid; 1713 __le16 PidHigh; 1714 __u16 Mid; 1715 __u16 Tid; 1716 __u16 Uid; 1717 __u16 netfid; 1718 __u32 filter; /* CompletionFilter (for multishot) */ 1719 int multishot; 1720 struct file *pfile; 1721 }; 1722 1723 struct dfs_info3_param { 1724 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1725 int path_consumed; 1726 int server_type; 1727 int ref_flag; 1728 char *path_name; 1729 char *node_name; 1730 int ttl; 1731 }; 1732 1733 struct file_list { 1734 struct list_head list; 1735 struct cifsFileInfo *cfile; 1736 }; 1737 1738 struct cifs_mount_ctx { 1739 struct cifs_sb_info *cifs_sb; 1740 struct smb3_fs_context *fs_ctx; 1741 unsigned int xid; 1742 struct TCP_Server_Info *server; 1743 struct cifs_ses *ses; 1744 struct cifs_tcon *tcon; 1745 struct list_head dfs_ses_list; 1746 }; 1747 1748 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1749 { 1750 kfree(param->path_name); 1751 kfree(param->node_name); 1752 } 1753 1754 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1755 { 1756 if (param) 1757 __free_dfs_info_param(param); 1758 } 1759 1760 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1761 { 1762 if (param) { 1763 __free_dfs_info_param(param); 1764 memset(param, 0, sizeof(*param)); 1765 } 1766 } 1767 1768 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1769 int number_of_items) 1770 { 1771 int i; 1772 1773 if ((number_of_items == 0) || (param == NULL)) 1774 return; 1775 for (i = 0; i < number_of_items; i++) { 1776 kfree(param[i].path_name); 1777 kfree(param[i].node_name); 1778 } 1779 kfree(param); 1780 } 1781 1782 static inline bool is_interrupt_error(int error) 1783 { 1784 switch (error) { 1785 case -EINTR: 1786 case -ERESTARTSYS: 1787 case -ERESTARTNOHAND: 1788 case -ERESTARTNOINTR: 1789 return true; 1790 } 1791 return false; 1792 } 1793 1794 static inline bool is_retryable_error(int error) 1795 { 1796 if (is_interrupt_error(error) || error == -EAGAIN) 1797 return true; 1798 return false; 1799 } 1800 1801 1802 /* cifs_get_writable_file() flags */ 1803 #define FIND_WR_ANY 0 1804 #define FIND_WR_FSUID_ONLY 1 1805 #define FIND_WR_WITH_DELETE 2 1806 1807 #define MID_FREE 0 1808 #define MID_REQUEST_ALLOCATED 1 1809 #define MID_REQUEST_SUBMITTED 2 1810 #define MID_RESPONSE_RECEIVED 4 1811 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1812 #define MID_RESPONSE_MALFORMED 0x10 1813 #define MID_SHUTDOWN 0x20 1814 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1815 1816 /* Flags */ 1817 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1818 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1819 1820 /* Types of response buffer returned from SendReceive2 */ 1821 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1822 #define CIFS_SMALL_BUFFER 1 1823 #define CIFS_LARGE_BUFFER 2 1824 #define CIFS_IOVEC 4 /* array of response buffers */ 1825 1826 /* Type of Request to SendReceive2 */ 1827 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1828 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1829 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1830 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1831 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1832 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1833 1834 /* Type of request operation */ 1835 #define CIFS_ECHO_OP 0x080 /* echo request */ 1836 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1837 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1838 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1839 /* Lower bitmask values are reserved by others below. */ 1840 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1841 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1842 1843 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1844 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1845 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1846 1847 /* Security Flags: indicate type of session setup needed */ 1848 #define CIFSSEC_MAY_SIGN 0x00001 1849 #define CIFSSEC_MAY_NTLMV2 0x00004 1850 #define CIFSSEC_MAY_KRB5 0x00008 1851 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1852 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1853 1854 #define CIFSSEC_MUST_SIGN 0x01001 1855 /* note that only one of the following can be set so the 1856 result of setting MUST flags more than once will be to 1857 require use of the stronger protocol */ 1858 #define CIFSSEC_MUST_NTLMV2 0x04004 1859 #define CIFSSEC_MUST_KRB5 0x08008 1860 #ifdef CONFIG_CIFS_UPCALL 1861 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1862 #else 1863 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1864 #endif /* UPCALL */ 1865 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1866 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1867 1868 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1869 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1870 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1871 /* 1872 ***************************************************************** 1873 * All constants go here 1874 ***************************************************************** 1875 */ 1876 1877 #define UID_HASH (16) 1878 1879 /* 1880 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1881 * following to be declared. 1882 */ 1883 1884 /**************************************************************************** 1885 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1886 * to the locking order. i.e. if two locks are to be held together, the lock that 1887 * appears higher in this list needs to be taken before the other. 1888 * 1889 * If you hold a lock that is lower in this list, and you need to take a higher lock 1890 * (or if you think that one of the functions that you're calling may need to), first 1891 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1892 * ensure that locks are picked up only in one direction in the below table 1893 * (top to bottom). 1894 * 1895 * Also, if you expect a function to be called with a lock held, explicitly document 1896 * this in the comments on top of your function definition. 1897 * 1898 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1899 * possible. Blocking / calling other functions with a lock held always increase 1900 * the risk of a possible deadlock. 1901 * 1902 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1903 * debug. Also, any new lock that you introduce, please add to this list in the correct 1904 * order. 1905 * 1906 * Please populate this list whenever you introduce new locks in your changes. Or in 1907 * case I've missed some existing locks. Please ensure that it's added in the list 1908 * based on the locking order expected. 1909 * 1910 * ===================================================================================== 1911 * Lock Protects Initialization fn 1912 * ===================================================================================== 1913 * vol_list_lock 1914 * vol_info->ctx_lock vol_info->ctx 1915 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1916 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1917 * reconnect_mutex 1918 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1919 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1920 * cifs_tcon 1921 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1922 * cifs_tcon->pending_opens 1923 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1924 * cifs_tcon->bytes_written 1925 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1926 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1927 * GlobalCurrentXid 1928 * GlobalTotalActiveXid 1929 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1930 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1931 * ->CurrentMid 1932 * (any changes in mid_q_entry fields) 1933 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1934 * ->credits 1935 * ->echo_credits 1936 * ->oplock_credits 1937 * ->reconnect_instance 1938 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1939 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1940 * ->iface_count 1941 * ->iface_last_update 1942 * cifs_ses->chan_lock cifs_ses->chans 1943 * ->chans_need_reconnect 1944 * ->chans_in_reconnect 1945 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1946 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1947 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1948 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1949 * ->can_cache_brlcks 1950 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1951 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1952 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1953 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1954 * ->invalidHandle initiate_cifs_search 1955 * ->oplock_break_cancelled 1956 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 1957 ****************************************************************************/ 1958 1959 #ifdef DECLARE_GLOBALS_HERE 1960 #define GLOBAL_EXTERN 1961 #else 1962 #define GLOBAL_EXTERN extern 1963 #endif 1964 1965 /* 1966 * the list of TCP_Server_Info structures, ie each of the sockets 1967 * connecting our client to a distinct server (ip address), is 1968 * chained together by cifs_tcp_ses_list. The list of all our SMB 1969 * sessions (and from that the tree connections) can be found 1970 * by iterating over cifs_tcp_ses_list 1971 */ 1972 extern struct list_head cifs_tcp_ses_list; 1973 1974 /* 1975 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1976 * tcp session, and the list of tcon's per smb session. It also protects 1977 * the reference counters for the server, smb session, and tcon. 1978 * generally the locks should be taken in order tcp_ses_lock before 1979 * tcon->open_file_lock and that before file->file_info_lock since the 1980 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 1981 */ 1982 extern spinlock_t cifs_tcp_ses_lock; 1983 1984 /* 1985 * Global transaction id (XID) information 1986 */ 1987 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 1988 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 1989 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 1990 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 1991 1992 /* 1993 * Global counters, updated atomically 1994 */ 1995 extern atomic_t sesInfoAllocCount; 1996 extern atomic_t tconInfoAllocCount; 1997 extern atomic_t tcpSesNextId; 1998 extern atomic_t tcpSesAllocCount; 1999 extern atomic_t tcpSesReconnectCount; 2000 extern atomic_t tconInfoReconnectCount; 2001 2002 /* Various Debug counters */ 2003 extern atomic_t buf_alloc_count; /* current number allocated */ 2004 extern atomic_t small_buf_alloc_count; 2005 #ifdef CONFIG_CIFS_STATS2 2006 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2007 extern atomic_t total_small_buf_alloc_count; 2008 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2009 #endif 2010 2011 /* Misc globals */ 2012 extern bool enable_oplocks; /* enable or disable oplocks */ 2013 extern bool lookupCacheEnabled; 2014 extern unsigned int global_secflags; /* if on, session setup sent 2015 with more secure ntlmssp2 challenge/resp */ 2016 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2017 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2018 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2019 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2020 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2021 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2022 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2023 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2024 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2025 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2026 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2027 extern atomic_t mid_count; 2028 2029 void cifs_oplock_break(struct work_struct *work); 2030 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2031 void smb2_deferred_work_close(struct work_struct *work); 2032 2033 extern const struct slow_work_ops cifs_oplock_break_ops; 2034 extern struct workqueue_struct *cifsiod_wq; 2035 extern struct workqueue_struct *decrypt_wq; 2036 extern struct workqueue_struct *fileinfo_put_wq; 2037 extern struct workqueue_struct *cifsoplockd_wq; 2038 extern struct workqueue_struct *deferredclose_wq; 2039 extern __u32 cifs_lock_secret; 2040 2041 extern mempool_t *cifs_mid_poolp; 2042 2043 /* Operations for different SMB versions */ 2044 #define SMB1_VERSION_STRING "1.0" 2045 #define SMB20_VERSION_STRING "2.0" 2046 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2047 extern struct smb_version_operations smb1_operations; 2048 extern struct smb_version_values smb1_values; 2049 extern struct smb_version_operations smb20_operations; 2050 extern struct smb_version_values smb20_values; 2051 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2052 #define SMB21_VERSION_STRING "2.1" 2053 extern struct smb_version_operations smb21_operations; 2054 extern struct smb_version_values smb21_values; 2055 #define SMBDEFAULT_VERSION_STRING "default" 2056 extern struct smb_version_values smbdefault_values; 2057 #define SMB3ANY_VERSION_STRING "3" 2058 extern struct smb_version_values smb3any_values; 2059 #define SMB30_VERSION_STRING "3.0" 2060 extern struct smb_version_operations smb30_operations; 2061 extern struct smb_version_values smb30_values; 2062 #define SMB302_VERSION_STRING "3.02" 2063 #define ALT_SMB302_VERSION_STRING "3.0.2" 2064 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2065 extern struct smb_version_values smb302_values; 2066 #define SMB311_VERSION_STRING "3.1.1" 2067 #define ALT_SMB311_VERSION_STRING "3.11" 2068 extern struct smb_version_operations smb311_operations; 2069 extern struct smb_version_values smb311_values; 2070 2071 static inline char *get_security_type_str(enum securityEnum sectype) 2072 { 2073 switch (sectype) { 2074 case RawNTLMSSP: 2075 return "RawNTLMSSP"; 2076 case Kerberos: 2077 return "Kerberos"; 2078 case NTLMv2: 2079 return "NTLMv2"; 2080 default: 2081 return "Unknown"; 2082 } 2083 } 2084 2085 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2086 { 2087 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2088 } 2089 2090 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2091 { 2092 /* 2093 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2094 * Subsystem Notifies That a Share Is a DFS Share. 2095 * 2096 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2097 * Application Updates a Share. 2098 */ 2099 if (!tcon || !tcon->ses || !tcon->ses->server) 2100 return false; 2101 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2102 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2103 } 2104 2105 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2106 const struct dfs_info3_param *ref) 2107 { 2108 /* 2109 * Check if all targets are capable of handling DFS referrals as per 2110 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2111 */ 2112 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2113 } 2114 2115 static inline u64 cifs_flock_len(const struct file_lock *fl) 2116 { 2117 return (u64)fl->fl_end - fl->fl_start + 1; 2118 } 2119 2120 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2121 { 2122 if (WARN_ON_ONCE(!ses || !ses->server)) 2123 return 0; 2124 /* 2125 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2126 * servers do require it during NTLMSSP. 2127 */ 2128 if (ses->server->dialect <= SMB20_PROT_ID) 2129 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2130 return sizeof(ses->workstation_name); 2131 } 2132 2133 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2134 { 2135 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2136 dst->AccessFlags = src->AccessFlags; 2137 dst->CurrentByteOffset = src->CurrentByteOffset; 2138 dst->Mode = src->Mode; 2139 dst->AlignmentRequirement = src->AlignmentRequirement; 2140 dst->FileNameLength = src->FileNameLength; 2141 } 2142 2143 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2144 int num_rqst, 2145 const u8 *sig) 2146 { 2147 unsigned int len, skip; 2148 unsigned int nents = 0; 2149 unsigned long addr; 2150 size_t data_size; 2151 int i, j; 2152 2153 /* 2154 * The first rqst has a transform header where the first 20 bytes are 2155 * not part of the encrypted blob. 2156 */ 2157 skip = 20; 2158 2159 /* Assumes the first rqst has a transform header as the first iov. 2160 * I.e. 2161 * rqst[0].rq_iov[0] is transform header 2162 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2163 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2164 */ 2165 for (i = 0; i < num_rqst; i++) { 2166 data_size = iov_iter_count(&rqst[i].rq_iter); 2167 2168 /* We really don't want a mixture of pinned and unpinned pages 2169 * in the sglist. It's hard to keep track of which is what. 2170 * Instead, we convert to a BVEC-type iterator higher up. 2171 */ 2172 if (data_size && 2173 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2174 return -EIO; 2175 2176 /* We also don't want to have any extra refs or pins to clean 2177 * up in the sglist. 2178 */ 2179 if (data_size && 2180 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2181 return -EIO; 2182 2183 for (j = 0; j < rqst[i].rq_nvec; j++) { 2184 struct kvec *iov = &rqst[i].rq_iov[j]; 2185 2186 addr = (unsigned long)iov->iov_base + skip; 2187 if (unlikely(is_vmalloc_addr((void *)addr))) { 2188 len = iov->iov_len - skip; 2189 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2190 PAGE_SIZE); 2191 } else { 2192 nents++; 2193 } 2194 skip = 0; 2195 } 2196 if (data_size) 2197 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2198 } 2199 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2200 return nents; 2201 } 2202 2203 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2204 * stack object as buf. 2205 */ 2206 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2207 const void *buf, 2208 unsigned int buflen) 2209 { 2210 unsigned long addr = (unsigned long)buf; 2211 unsigned int off = offset_in_page(addr); 2212 2213 addr &= PAGE_MASK; 2214 if (unlikely(is_vmalloc_addr((void *)addr))) { 2215 do { 2216 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2217 2218 sg_set_page(&sgtable->sgl[sgtable->nents++], 2219 vmalloc_to_page((void *)addr), len, off); 2220 2221 off = 0; 2222 addr += PAGE_SIZE; 2223 buflen -= len; 2224 } while (buflen); 2225 } else { 2226 sg_set_page(&sgtable->sgl[sgtable->nents++], 2227 virt_to_page((void *)addr), buflen, off); 2228 } 2229 } 2230 2231 struct smb2_compound_vars { 2232 struct cifs_open_parms oparms; 2233 struct kvec rsp_iov[3]; 2234 struct smb_rqst rqst[3]; 2235 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2236 struct kvec qi_iov; 2237 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2238 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2239 struct kvec close_iov; 2240 struct smb2_file_rename_info rename_info; 2241 struct smb2_file_link_info link_info; 2242 }; 2243 2244 #endif /* _CIFS_GLOB_H */ 2245