1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002,2008 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * Jeremy Allison (jra@samba.org) 7 * 8 */ 9 #ifndef _CIFS_GLOB_H 10 #define _CIFS_GLOB_H 11 12 #include <linux/in.h> 13 #include <linux/in6.h> 14 #include <linux/inet.h> 15 #include <linux/slab.h> 16 #include <linux/scatterlist.h> 17 #include <linux/mm.h> 18 #include <linux/mempool.h> 19 #include <linux/workqueue.h> 20 #include <linux/utsname.h> 21 #include <linux/sched/mm.h> 22 #include <linux/netfs.h> 23 #include "cifs_fs_sb.h" 24 #include "cifsacl.h" 25 #include <crypto/internal/hash.h> 26 #include <uapi/linux/cifs/cifs_mount.h> 27 #include "../common/smb2pdu.h" 28 #include "smb2pdu.h" 29 #include <linux/filelock.h> 30 31 #define SMB_PATH_MAX 260 32 #define CIFS_PORT 445 33 #define RFC1001_PORT 139 34 35 /* 36 * The sizes of various internal tables and strings 37 */ 38 #define MAX_UID_INFO 16 39 #define MAX_SES_INFO 2 40 #define MAX_TCON_INFO 4 41 42 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) 43 44 #define CIFS_MIN_RCV_POOL 4 45 46 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ 47 /* 48 * default attribute cache timeout (jiffies) 49 */ 50 #define CIFS_DEF_ACTIMEO (1 * HZ) 51 52 /* 53 * max sleep time before retry to server 54 */ 55 #define CIFS_MAX_SLEEP 2000 56 57 /* 58 * max attribute cache timeout (jiffies) - 2^30 59 */ 60 #define CIFS_MAX_ACTIMEO (1 << 30) 61 62 /* 63 * Max persistent and resilient handle timeout (milliseconds). 64 * Windows durable max was 960000 (16 minutes) 65 */ 66 #define SMB3_MAX_HANDLE_TIMEOUT 960000 67 68 /* 69 * MAX_REQ is the maximum number of requests that WE will send 70 * on one socket concurrently. 71 */ 72 #define CIFS_MAX_REQ 32767 73 74 #define RFC1001_NAME_LEN 15 75 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 76 77 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 78 #define SERVER_NAME_LENGTH 80 79 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 80 81 /* echo interval in seconds */ 82 #define SMB_ECHO_INTERVAL_MIN 1 83 #define SMB_ECHO_INTERVAL_MAX 600 84 #define SMB_ECHO_INTERVAL_DEFAULT 60 85 86 /* smb multichannel query server interfaces interval in seconds */ 87 #define SMB_INTERFACE_POLL_INTERVAL 600 88 89 /* maximum number of PDUs in one compound */ 90 #define MAX_COMPOUND 7 91 92 /* 93 * Default number of credits to keep available for SMB3. 94 * This value is chosen somewhat arbitrarily. The Windows client 95 * defaults to 128 credits, the Windows server allows clients up to 96 * 512 credits (or 8K for later versions), and the NetApp server 97 * does not limit clients at all. Choose a high enough default value 98 * such that the client shouldn't limit performance, but allow mount 99 * to override (until you approach 64K, where we limit credits to 65000 100 * to reduce possibility of seeing more server credit overflow bugs. 101 */ 102 #define SMB2_MAX_CREDITS_AVAILABLE 32000 103 104 #include "cifspdu.h" 105 106 #ifndef XATTR_DOS_ATTRIB 107 #define XATTR_DOS_ATTRIB "user.DOSATTRIB" 108 #endif 109 110 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ 111 112 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) 113 114 /* 115 * CIFS vfs client Status information (based on what we know.) 116 */ 117 118 /* associated with each connection */ 119 enum statusEnum { 120 CifsNew = 0, 121 CifsGood, 122 CifsExiting, 123 CifsNeedReconnect, 124 CifsNeedNegotiate, 125 CifsInNegotiate, 126 }; 127 128 /* associated with each smb session */ 129 enum ses_status_enum { 130 SES_NEW = 0, 131 SES_GOOD, 132 SES_EXITING, 133 SES_NEED_RECON, 134 SES_IN_SETUP 135 }; 136 137 /* associated with each tree connection to the server */ 138 enum tid_status_enum { 139 TID_NEW = 0, 140 TID_GOOD, 141 TID_EXITING, 142 TID_NEED_RECON, 143 TID_NEED_TCON, 144 TID_IN_TCON, 145 TID_NEED_FILES_INVALIDATE, /* currently unused */ 146 TID_IN_FILES_INVALIDATE 147 }; 148 149 enum securityEnum { 150 Unspecified = 0, /* not specified */ 151 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 152 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 153 Kerberos, /* Kerberos via SPNEGO */ 154 }; 155 156 enum cifs_reparse_type { 157 CIFS_REPARSE_TYPE_NFS, 158 CIFS_REPARSE_TYPE_WSL, 159 CIFS_REPARSE_TYPE_DEFAULT = CIFS_REPARSE_TYPE_NFS, 160 }; 161 162 static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type) 163 { 164 switch (type) { 165 case CIFS_REPARSE_TYPE_NFS: 166 return "nfs"; 167 case CIFS_REPARSE_TYPE_WSL: 168 return "wsl"; 169 default: 170 return "unknown"; 171 } 172 } 173 174 struct session_key { 175 unsigned int len; 176 char *response; 177 }; 178 179 /* crypto hashing related structure/fields, not specific to a sec mech */ 180 struct cifs_secmech { 181 struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ 182 struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ 183 struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ 184 struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ 185 struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ 186 187 struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ 188 struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ 189 }; 190 191 /* per smb session structure/fields */ 192 struct ntlmssp_auth { 193 bool sesskey_per_smbsess; /* whether session key is per smb session */ 194 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 195 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 196 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 197 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 198 }; 199 200 struct cifs_cred { 201 int uid; 202 int gid; 203 int mode; 204 int cecount; 205 struct smb_sid osid; 206 struct smb_sid gsid; 207 struct cifs_ntace *ntaces; 208 struct smb_ace *aces; 209 }; 210 211 struct cifs_open_info_data { 212 bool adjust_tz; 213 union { 214 bool reparse_point; 215 bool symlink; 216 }; 217 struct { 218 /* ioctl response buffer */ 219 struct { 220 int buftype; 221 struct kvec iov; 222 } io; 223 __u32 tag; 224 union { 225 struct reparse_data_buffer *buf; 226 struct reparse_posix_data *posix; 227 }; 228 } reparse; 229 struct { 230 __u8 eas[SMB2_WSL_MAX_QUERY_EA_RESP_SIZE]; 231 unsigned int eas_len; 232 } wsl; 233 char *symlink_target; 234 struct smb_sid posix_owner; 235 struct smb_sid posix_group; 236 union { 237 struct smb2_file_all_info fi; 238 struct smb311_posix_qinfo posix_fi; 239 }; 240 }; 241 242 /* 243 ***************************************************************** 244 * Except the CIFS PDUs themselves all the 245 * globally interesting structs should go here 246 ***************************************************************** 247 */ 248 249 /* 250 * A smb_rqst represents a complete request to be issued to a server. It's 251 * formed by a kvec array, followed by an array of pages. Page data is assumed 252 * to start at the beginning of the first page. 253 */ 254 struct smb_rqst { 255 struct kvec *rq_iov; /* array of kvecs */ 256 unsigned int rq_nvec; /* number of kvecs in array */ 257 struct iov_iter rq_iter; /* Data iterator */ 258 struct folio_queue *rq_buffer; /* Buffer for encryption */ 259 }; 260 261 struct mid_q_entry; 262 struct TCP_Server_Info; 263 struct cifsFileInfo; 264 struct cifs_ses; 265 struct cifs_tcon; 266 struct dfs_info3_param; 267 struct cifs_fattr; 268 struct smb3_fs_context; 269 struct cifs_fid; 270 struct cifs_io_subrequest; 271 struct cifs_io_parms; 272 struct cifs_search_info; 273 struct cifsInodeInfo; 274 struct cifs_open_parms; 275 struct cifs_credits; 276 277 struct smb_version_operations { 278 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 279 struct mid_q_entry *); 280 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 281 /* setup request: allocate mid, sign message */ 282 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 283 struct TCP_Server_Info *, 284 struct smb_rqst *); 285 /* setup async request: allocate mid, sign message */ 286 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 287 struct smb_rqst *); 288 /* check response: verify signature, map error */ 289 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 290 bool); 291 void (*add_credits)(struct TCP_Server_Info *server, 292 struct cifs_credits *credits, 293 const int optype); 294 void (*set_credits)(struct TCP_Server_Info *, const int); 295 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 296 unsigned int (*get_credits)(struct mid_q_entry *); 297 __u64 (*get_next_mid)(struct TCP_Server_Info *); 298 void (*revert_current_mid)(struct TCP_Server_Info *server, 299 const unsigned int val); 300 /* data offset from read response message */ 301 unsigned int (*read_data_offset)(char *); 302 /* 303 * Data length from read response message 304 * When in_remaining is true, the returned data length is in 305 * message field DataRemaining for out-of-band data read (e.g through 306 * Memory Registration RDMA write in SMBD). 307 * Otherwise, the returned data length is in message field DataLength. 308 */ 309 unsigned int (*read_data_length)(char *, bool in_remaining); 310 /* map smb to linux error */ 311 int (*map_error)(char *, bool); 312 /* find mid corresponding to the response message */ 313 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 314 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 315 void (*clear_stats)(struct cifs_tcon *); 316 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 317 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 318 /* verify the message */ 319 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 320 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 321 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 322 void (*downgrade_oplock)(struct TCP_Server_Info *server, 323 struct cifsInodeInfo *cinode, __u32 oplock, 324 unsigned int epoch, bool *purge_cache); 325 /* process transaction2 response */ 326 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 327 char *, int); 328 /* check if we need to negotiate */ 329 bool (*need_neg)(struct TCP_Server_Info *); 330 /* negotiate to the server */ 331 int (*negotiate)(const unsigned int xid, 332 struct cifs_ses *ses, 333 struct TCP_Server_Info *server); 334 /* set negotiated write size */ 335 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 336 /* set negotiated read size */ 337 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 338 /* setup smb sessionn */ 339 int (*sess_setup)(const unsigned int, struct cifs_ses *, 340 struct TCP_Server_Info *server, 341 const struct nls_table *); 342 /* close smb session */ 343 int (*logoff)(const unsigned int, struct cifs_ses *); 344 /* connect to a server share */ 345 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 346 struct cifs_tcon *, const struct nls_table *); 347 /* close tree connection */ 348 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 349 /* get DFS referrals */ 350 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 351 const char *, struct dfs_info3_param **, 352 unsigned int *, const struct nls_table *, int); 353 /* informational QFS call */ 354 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 355 struct cifs_sb_info *); 356 /* query for server interfaces */ 357 int (*query_server_interfaces)(const unsigned int, struct cifs_tcon *, 358 bool); 359 /* check if a path is accessible or not */ 360 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 361 struct cifs_sb_info *, const char *); 362 /* query path data from the server */ 363 int (*query_path_info)(const unsigned int xid, 364 struct cifs_tcon *tcon, 365 struct cifs_sb_info *cifs_sb, 366 const char *full_path, 367 struct cifs_open_info_data *data); 368 /* query file data from the server */ 369 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 370 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 371 /* query reparse point to determine which type of special file */ 372 int (*query_reparse_point)(const unsigned int xid, 373 struct cifs_tcon *tcon, 374 struct cifs_sb_info *cifs_sb, 375 const char *full_path, 376 u32 *tag, struct kvec *rsp, 377 int *rsp_buftype); 378 /* get server index number */ 379 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 380 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 381 struct cifs_open_info_data *data); 382 /* set size by path */ 383 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 384 const char *, __u64, struct cifs_sb_info *, bool, 385 struct dentry *); 386 /* set size by file handle */ 387 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 388 struct cifsFileInfo *, __u64, bool); 389 /* set attributes */ 390 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 391 const unsigned int); 392 int (*set_compression)(const unsigned int, struct cifs_tcon *, 393 struct cifsFileInfo *); 394 /* check if we can send an echo or nor */ 395 bool (*can_echo)(struct TCP_Server_Info *); 396 /* send echo request */ 397 int (*echo)(struct TCP_Server_Info *); 398 /* create directory */ 399 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 400 umode_t mode, struct cifs_tcon *tcon, 401 const char *full_path, 402 struct cifs_sb_info *cifs_sb); 403 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 404 struct cifs_tcon *tcon, const char *name, 405 struct cifs_sb_info *sb); 406 /* set info on created directory */ 407 void (*mkdir_setinfo)(struct inode *, const char *, 408 struct cifs_sb_info *, struct cifs_tcon *, 409 const unsigned int); 410 /* remove directory */ 411 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 412 struct cifs_sb_info *); 413 /* unlink file */ 414 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 415 struct cifs_sb_info *, struct dentry *); 416 /* open, rename and delete file */ 417 int (*rename_pending_delete)(const char *, struct dentry *, 418 const unsigned int); 419 /* send rename request */ 420 int (*rename)(const unsigned int xid, 421 struct cifs_tcon *tcon, 422 struct dentry *source_dentry, 423 const char *from_name, const char *to_name, 424 struct cifs_sb_info *cifs_sb); 425 /* send create hardlink request */ 426 int (*create_hardlink)(const unsigned int xid, 427 struct cifs_tcon *tcon, 428 struct dentry *source_dentry, 429 const char *from_name, const char *to_name, 430 struct cifs_sb_info *cifs_sb); 431 /* query symlink target */ 432 int (*query_symlink)(const unsigned int xid, 433 struct cifs_tcon *tcon, 434 struct cifs_sb_info *cifs_sb, 435 const char *full_path, 436 char **target_path); 437 /* open a file for non-posix mounts */ 438 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 439 void *buf); 440 /* set fid protocol-specific info */ 441 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 442 /* close a file */ 443 int (*close)(const unsigned int, struct cifs_tcon *, 444 struct cifs_fid *); 445 /* close a file, returning file attributes and timestamps */ 446 int (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 447 struct cifsFileInfo *pfile_info); 448 /* send a flush request to the server */ 449 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 450 /* async read from the server */ 451 int (*async_readv)(struct cifs_io_subrequest *); 452 /* async write to the server */ 453 void (*async_writev)(struct cifs_io_subrequest *); 454 /* sync read from the server */ 455 int (*sync_read)(const unsigned int, struct cifs_fid *, 456 struct cifs_io_parms *, unsigned int *, char **, 457 int *); 458 /* sync write to the server */ 459 int (*sync_write)(const unsigned int, struct cifs_fid *, 460 struct cifs_io_parms *, unsigned int *, struct kvec *, 461 unsigned long); 462 /* open dir, start readdir */ 463 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 464 const char *, struct cifs_sb_info *, 465 struct cifs_fid *, __u16, 466 struct cifs_search_info *); 467 /* continue readdir */ 468 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 469 struct cifs_fid *, 470 __u16, struct cifs_search_info *srch_inf); 471 /* close dir */ 472 int (*close_dir)(const unsigned int, struct cifs_tcon *, 473 struct cifs_fid *); 474 /* calculate a size of SMB message */ 475 unsigned int (*calc_smb_size)(void *buf); 476 /* check for STATUS_PENDING and process the response if yes */ 477 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 478 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 479 bool (*is_session_expired)(char *); 480 /* send oplock break response */ 481 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 482 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 483 /* query remote filesystem */ 484 int (*queryfs)(const unsigned int, struct cifs_tcon *, 485 struct cifs_sb_info *, struct kstatfs *); 486 /* send mandatory brlock to the server */ 487 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 488 __u64, __u32, int, int, bool); 489 /* unlock range of mandatory locks */ 490 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 491 const unsigned int); 492 /* push brlocks from the cache to the server */ 493 int (*push_mand_locks)(struct cifsFileInfo *); 494 /* get lease key of the inode */ 495 void (*get_lease_key)(struct inode *, struct cifs_fid *); 496 /* set lease key of the inode */ 497 void (*set_lease_key)(struct inode *, struct cifs_fid *); 498 /* generate new lease key */ 499 void (*new_lease_key)(struct cifs_fid *); 500 int (*generate_signingkey)(struct cifs_ses *ses, 501 struct TCP_Server_Info *server); 502 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 503 bool allocate_crypto); 504 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 505 struct cifsFileInfo *src_file); 506 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 507 struct cifsFileInfo *src_file, void __user *); 508 int (*notify)(const unsigned int xid, struct file *pfile, 509 void __user *pbuf, bool return_changes); 510 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 511 struct cifs_sb_info *, const unsigned char *, 512 char *, unsigned int *); 513 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 514 struct cifs_sb_info *, const unsigned char *, 515 char *, unsigned int *); 516 /* if we can do cache read operations */ 517 bool (*is_read_op)(__u32); 518 /* set oplock level for the inode */ 519 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 520 bool *); 521 /* create lease context buffer for CREATE request */ 522 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 523 /* parse lease context buffer and return oplock/epoch info */ 524 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 525 ssize_t (*copychunk_range)(const unsigned int, 526 struct cifsFileInfo *src_file, 527 struct cifsFileInfo *target_file, 528 u64 src_off, u64 len, u64 dest_off); 529 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 530 struct cifsFileInfo *target_file, u64 src_off, u64 len, 531 u64 dest_off); 532 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 533 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 534 const unsigned char *, const unsigned char *, char *, 535 size_t, struct cifs_sb_info *); 536 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 537 const char *, const void *, const __u16, 538 const struct nls_table *, struct cifs_sb_info *); 539 struct smb_ntsd * (*get_acl)(struct cifs_sb_info *cifssb, struct inode *ino, 540 const char *patch, u32 *plen, u32 info); 541 struct smb_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *cifssmb, 542 const struct cifs_fid *pfid, u32 *plen, u32 info); 543 int (*set_acl)(struct smb_ntsd *pntsd, __u32 len, struct inode *ino, const char *path, 544 int flag); 545 /* writepages retry size */ 546 unsigned int (*wp_retry_size)(struct inode *); 547 /* get mtu credits */ 548 int (*wait_mtu_credits)(struct TCP_Server_Info *, size_t, 549 size_t *, struct cifs_credits *); 550 /* adjust previously taken mtu credits to request size */ 551 int (*adjust_credits)(struct TCP_Server_Info *server, 552 struct cifs_io_subrequest *subreq, 553 unsigned int /*enum smb3_rw_credits_trace*/ trace); 554 /* check if we need to issue closedir */ 555 bool (*dir_needs_close)(struct cifsFileInfo *); 556 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 557 loff_t); 558 /* init transform (compress/encrypt) request */ 559 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 560 struct smb_rqst *, struct smb_rqst *); 561 int (*is_transform_hdr)(void *buf); 562 int (*receive_transform)(struct TCP_Server_Info *, 563 struct mid_q_entry **, char **, int *); 564 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 565 enum securityEnum); 566 int (*next_header)(struct TCP_Server_Info *server, char *buf, 567 unsigned int *noff); 568 /* ioctl passthrough for query_info */ 569 int (*ioctl_query_info)(const unsigned int xid, 570 struct cifs_tcon *tcon, 571 struct cifs_sb_info *cifs_sb, 572 __le16 *path, int is_dir, 573 unsigned long p); 574 /* make unix special files (block, char, fifo, socket) */ 575 int (*make_node)(unsigned int xid, 576 struct inode *inode, 577 struct dentry *dentry, 578 struct cifs_tcon *tcon, 579 const char *full_path, 580 umode_t mode, 581 dev_t device_number); 582 /* version specific fiemap implementation */ 583 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 584 struct fiemap_extent_info *, u64, u64); 585 /* version specific llseek implementation */ 586 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 587 /* Check for STATUS_IO_TIMEOUT */ 588 bool (*is_status_io_timeout)(char *buf); 589 /* Check for STATUS_NETWORK_NAME_DELETED */ 590 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 591 int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, 592 struct kvec *rsp_iov, 593 struct cifs_open_info_data *data); 594 int (*create_reparse_symlink)(const unsigned int xid, 595 struct inode *inode, 596 struct dentry *dentry, 597 struct cifs_tcon *tcon, 598 const char *full_path, 599 const char *symname); 600 }; 601 602 struct smb_version_values { 603 char *version_string; 604 __u16 protocol_id; 605 __u32 req_capabilities; 606 __u32 large_lock_type; 607 __u32 exclusive_lock_type; 608 __u32 shared_lock_type; 609 __u32 unlock_lock_type; 610 size_t header_preamble_size; 611 size_t header_size; 612 size_t max_header_size; 613 size_t read_rsp_size; 614 __le16 lock_cmd; 615 unsigned int cap_unix; 616 unsigned int cap_nt_find; 617 unsigned int cap_large_files; 618 __u16 signing_enabled; 619 __u16 signing_required; 620 size_t create_lease_size; 621 }; 622 623 #define HEADER_SIZE(server) (server->vals->header_size) 624 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 625 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 626 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 627 628 /** 629 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 630 * trying to reuse existing superblock for a new mount 631 */ 632 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 633 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 634 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 635 CIFS_MOUNT_MAP_SFM_CHR | \ 636 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 637 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 638 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 639 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 640 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 641 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 642 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 643 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 644 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 645 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 646 647 /** 648 * Generic VFS superblock mount flags (s_flags) to consider when 649 * trying to reuse existing superblock for a new mount 650 */ 651 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 652 SB_NODEV | SB_SYNCHRONOUS) 653 654 struct cifs_mnt_data { 655 struct cifs_sb_info *cifs_sb; 656 struct smb3_fs_context *ctx; 657 int flags; 658 }; 659 660 static inline unsigned int 661 get_rfc1002_length(void *buf) 662 { 663 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 664 } 665 666 static inline void 667 inc_rfc1001_len(void *buf, int count) 668 { 669 be32_add_cpu((__be32 *)buf, count); 670 } 671 672 struct TCP_Server_Info { 673 struct list_head tcp_ses_list; 674 struct list_head smb_ses_list; 675 spinlock_t srv_lock; /* protect anything here that is not protected */ 676 __u64 conn_id; /* connection identifier (useful for debugging) */ 677 int srv_count; /* reference counter */ 678 /* 15 character server name + 0x20 16th byte indicating type = srv */ 679 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 680 struct smb_version_operations *ops; 681 struct smb_version_values *vals; 682 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 683 enum statusEnum tcpStatus; /* what we think the status is */ 684 char *hostname; /* hostname portion of UNC string */ 685 struct socket *ssocket; 686 struct sockaddr_storage dstaddr; 687 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 688 #ifdef CONFIG_NET_NS 689 struct net *net; 690 #endif 691 wait_queue_head_t response_q; 692 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 693 spinlock_t mid_lock; /* protect mid queue and it's entries */ 694 struct list_head pending_mid_q; 695 bool noblocksnd; /* use blocking sendmsg */ 696 bool noautotune; /* do not autotune send buf sizes */ 697 bool nosharesock; 698 bool tcp_nodelay; 699 bool terminate; 700 unsigned int credits; /* send no more requests at once */ 701 unsigned int max_credits; /* can override large 32000 default at mnt */ 702 unsigned int in_flight; /* number of requests on the wire to server */ 703 unsigned int max_in_flight; /* max number of requests that were on wire */ 704 spinlock_t req_lock; /* protect the two values above */ 705 struct mutex _srv_mutex; 706 unsigned int nofs_flag; 707 struct task_struct *tsk; 708 char server_GUID[16]; 709 __u16 sec_mode; 710 bool sign; /* is signing enabled on this connection? */ 711 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 712 bool session_estab; /* mark when very first sess is established */ 713 int echo_credits; /* echo reserved slots */ 714 int oplock_credits; /* oplock break reserved slots */ 715 bool echoes:1; /* enable echoes */ 716 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 717 u16 dialect; /* dialect index that server chose */ 718 bool oplocks:1; /* enable oplocks */ 719 unsigned int maxReq; /* Clients should submit no more */ 720 /* than maxReq distinct unanswered SMBs to the server when using */ 721 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 722 unsigned int maxBuf; /* maxBuf specifies the maximum */ 723 /* message size the server can send or receive for non-raw SMBs */ 724 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 725 /* when socket is setup (and during reconnect) before NegProt sent */ 726 unsigned int max_rw; /* maxRw specifies the maximum */ 727 /* message size the server can send or receive for */ 728 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 729 unsigned int capabilities; /* selective disabling of caps by smb sess */ 730 int timeAdj; /* Adjust for difference in server time zone in sec */ 731 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 732 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 733 /* 16th byte of RFC1001 workstation name is always null */ 734 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 735 __u32 sequence_number; /* for signing, protected by srv_mutex */ 736 __u32 reconnect_instance; /* incremented on each reconnect */ 737 struct session_key session_key; 738 unsigned long lstrp; /* when we got last response from this server */ 739 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 740 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 741 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 742 char negflavor; /* NEGOTIATE response flavor */ 743 /* extended security flavors that server supports */ 744 bool sec_ntlmssp; /* supports NTLMSSP */ 745 bool sec_kerberosu2u; /* supports U2U Kerberos */ 746 bool sec_kerberos; /* supports plain Kerberos */ 747 bool sec_mskerberos; /* supports legacy MS Kerberos */ 748 bool large_buf; /* is current buffer large? */ 749 /* use SMBD connection instead of socket */ 750 bool rdma; 751 /* point to the SMBD connection if RDMA is used instead of socket */ 752 struct smbd_connection *smbd_conn; 753 struct delayed_work echo; /* echo ping workqueue job */ 754 char *smallbuf; /* pointer to current "small" buffer */ 755 char *bigbuf; /* pointer to current "big" buffer */ 756 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 757 unsigned int pdu_size; 758 unsigned int total_read; /* total amount of data read in this pass */ 759 atomic_t in_send; /* requests trying to send */ 760 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 761 #ifdef CONFIG_CIFS_STATS2 762 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 763 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 764 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 765 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 766 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 767 #endif /* STATS2 */ 768 unsigned int max_read; 769 unsigned int max_write; 770 unsigned int min_offload; 771 unsigned int retrans; 772 struct { 773 bool requested; /* "compress" mount option set*/ 774 bool enabled; /* actually negotiated with server */ 775 __le16 alg; /* preferred alg negotiated with server */ 776 } compression; 777 __u16 signing_algorithm; 778 __le16 cipher_type; 779 /* save initital negprot hash */ 780 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 781 bool signing_negotiated; /* true if valid signing context rcvd from server */ 782 bool posix_ext_supported; 783 struct delayed_work reconnect; /* reconnect workqueue job */ 784 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 785 unsigned long echo_interval; 786 787 /* 788 * Number of targets available for reconnect. The more targets 789 * the more tasks have to wait to let the demultiplex thread 790 * reconnect. 791 */ 792 int nr_targets; 793 bool noblockcnt; /* use non-blocking connect() */ 794 795 /* 796 * If this is a session channel, 797 * primary_server holds the ref-counted 798 * pointer to primary channel connection for the session. 799 */ 800 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 801 struct TCP_Server_Info *primary_server; 802 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 803 804 #ifdef CONFIG_CIFS_SWN_UPCALL 805 bool use_swn_dstaddr; 806 struct sockaddr_storage swn_dstaddr; 807 #endif 808 struct mutex refpath_lock; /* protects leaf_fullpath */ 809 /* 810 * leaf_fullpath: Canonical DFS referral path related to this 811 * connection. 812 * It is used in DFS cache refresher, reconnect and may 813 * change due to nested DFS links. 814 * 815 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 816 * mostly used for not requiring a copy of @leaf_fullpath when getting 817 * cached or new DFS referrals (which might also sleep during I/O). 818 * While @srv_lock is held for making string and NULL comparisons against 819 * both fields as in mount(2) and cache refresh. 820 * 821 * format: \\HOST\SHARE[\OPTIONAL PATH] 822 */ 823 char *leaf_fullpath; 824 }; 825 826 static inline bool is_smb1(struct TCP_Server_Info *server) 827 { 828 return HEADER_PREAMBLE_SIZE(server) != 0; 829 } 830 831 static inline void cifs_server_lock(struct TCP_Server_Info *server) 832 { 833 unsigned int nofs_flag = memalloc_nofs_save(); 834 835 mutex_lock(&server->_srv_mutex); 836 server->nofs_flag = nofs_flag; 837 } 838 839 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 840 { 841 unsigned int nofs_flag = server->nofs_flag; 842 843 mutex_unlock(&server->_srv_mutex); 844 memalloc_nofs_restore(nofs_flag); 845 } 846 847 struct cifs_credits { 848 unsigned int value; 849 unsigned int instance; 850 unsigned int in_flight_check; 851 unsigned int rreq_debug_id; 852 unsigned int rreq_debug_index; 853 }; 854 855 static inline unsigned int 856 in_flight(struct TCP_Server_Info *server) 857 { 858 unsigned int num; 859 860 spin_lock(&server->req_lock); 861 num = server->in_flight; 862 spin_unlock(&server->req_lock); 863 return num; 864 } 865 866 static inline bool 867 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 868 { 869 int num; 870 871 spin_lock(&server->req_lock); 872 num = *credits; 873 spin_unlock(&server->req_lock); 874 return num >= num_credits; 875 } 876 877 static inline void 878 add_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 879 const int optype) 880 { 881 server->ops->add_credits(server, credits, optype); 882 } 883 884 static inline void 885 add_credits_and_wake_if(struct TCP_Server_Info *server, 886 struct cifs_credits *credits, const int optype) 887 { 888 if (credits->value) { 889 server->ops->add_credits(server, credits, optype); 890 wake_up(&server->request_q); 891 credits->value = 0; 892 } 893 } 894 895 static inline void 896 set_credits(struct TCP_Server_Info *server, const int val) 897 { 898 server->ops->set_credits(server, val); 899 } 900 901 static inline int 902 adjust_credits(struct TCP_Server_Info *server, struct cifs_io_subrequest *subreq, 903 unsigned int /* enum smb3_rw_credits_trace */ trace) 904 { 905 return server->ops->adjust_credits ? 906 server->ops->adjust_credits(server, subreq, trace) : 0; 907 } 908 909 static inline __le64 910 get_next_mid64(struct TCP_Server_Info *server) 911 { 912 return cpu_to_le64(server->ops->get_next_mid(server)); 913 } 914 915 static inline __le16 916 get_next_mid(struct TCP_Server_Info *server) 917 { 918 __u16 mid = server->ops->get_next_mid(server); 919 /* 920 * The value in the SMB header should be little endian for easy 921 * on-the-wire decoding. 922 */ 923 return cpu_to_le16(mid); 924 } 925 926 static inline void 927 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 928 { 929 if (server->ops->revert_current_mid) 930 server->ops->revert_current_mid(server, val); 931 } 932 933 static inline void 934 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 935 const struct smb2_hdr *shdr) 936 { 937 unsigned int num = le16_to_cpu(shdr->CreditCharge); 938 939 return revert_current_mid(server, num > 0 ? num : 1); 940 } 941 942 static inline __u16 943 get_mid(const struct smb_hdr *smb) 944 { 945 return le16_to_cpu(smb->Mid); 946 } 947 948 static inline bool 949 compare_mid(__u16 mid, const struct smb_hdr *smb) 950 { 951 return mid == le16_to_cpu(smb->Mid); 952 } 953 954 /* 955 * When the server supports very large reads and writes via POSIX extensions, 956 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 957 * including the RFC1001 length. 958 * 959 * Note that this might make for "interesting" allocation problems during 960 * writeback however as we have to allocate an array of pointers for the 961 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 962 * 963 * For reads, there is a similar problem as we need to allocate an array 964 * of kvecs to handle the receive, though that should only need to be done 965 * once. 966 */ 967 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 968 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 969 970 /* 971 * When the server doesn't allow large posix writes, only allow a rsize/wsize 972 * of 2^17-1 minus the size of the call header. That allows for a read or 973 * write up to the maximum size described by RFC1002. 974 */ 975 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 976 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 977 978 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 979 980 /* 981 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 982 * those values when posix extensions aren't in force. In actuality here, we 983 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 984 * to be ok with the extra byte even though Windows doesn't send writes that 985 * are that large. 986 * 987 * Citation: 988 * 989 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 990 */ 991 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 992 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 993 994 /* 995 * Macros to allow the TCP_Server_Info->net field and related code to drop out 996 * when CONFIG_NET_NS isn't set. 997 */ 998 999 #ifdef CONFIG_NET_NS 1000 1001 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 1002 { 1003 return srv->net; 1004 } 1005 1006 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 1007 { 1008 srv->net = net; 1009 } 1010 1011 #else 1012 1013 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 1014 { 1015 return &init_net; 1016 } 1017 1018 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 1019 { 1020 } 1021 1022 #endif 1023 1024 struct cifs_server_iface { 1025 struct list_head iface_head; 1026 struct kref refcount; 1027 size_t speed; 1028 size_t weight_fulfilled; 1029 unsigned int num_channels; 1030 unsigned int rdma_capable : 1; 1031 unsigned int rss_capable : 1; 1032 unsigned int is_active : 1; /* unset if non existent */ 1033 struct sockaddr_storage sockaddr; 1034 }; 1035 1036 /* release iface when last ref is dropped */ 1037 static inline void 1038 release_iface(struct kref *ref) 1039 { 1040 struct cifs_server_iface *iface = container_of(ref, 1041 struct cifs_server_iface, 1042 refcount); 1043 kfree(iface); 1044 } 1045 1046 struct cifs_chan { 1047 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1048 struct TCP_Server_Info *server; 1049 struct cifs_server_iface *iface; /* interface in use */ 1050 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1051 }; 1052 1053 #define CIFS_SES_FLAG_SCALE_CHANNELS (0x1) 1054 1055 /* 1056 * Session structure. One of these for each uid session with a particular host 1057 */ 1058 struct cifs_ses { 1059 struct list_head smb_ses_list; 1060 struct list_head rlist; /* reconnect list */ 1061 struct list_head tcon_list; 1062 struct cifs_tcon *tcon_ipc; 1063 spinlock_t ses_lock; /* protect anything here that is not protected */ 1064 struct mutex session_mutex; 1065 struct TCP_Server_Info *server; /* pointer to server info */ 1066 int ses_count; /* reference counter */ 1067 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1068 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1069 char *serverOS; /* name of operating system underlying server */ 1070 char *serverNOS; /* name of network operating system of server */ 1071 char *serverDomain; /* security realm of server */ 1072 __u64 Suid; /* remote smb uid */ 1073 kuid_t linux_uid; /* overriding owner of files on the mount */ 1074 kuid_t cred_uid; /* owner of credentials */ 1075 unsigned int capabilities; 1076 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1077 char *user_name; /* must not be null except during init of sess 1078 and after mount option parsing we fill it */ 1079 char *domainName; 1080 char *password; 1081 char *password2; /* When key rotation used, new password may be set before it expires */ 1082 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1083 struct session_key auth_key; 1084 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1085 enum securityEnum sectype; /* what security flavor was specified? */ 1086 bool sign; /* is signing required? */ 1087 bool domainAuto:1; 1088 bool expired_pwd; /* track if access denied or expired pwd so can know if need to update */ 1089 unsigned int flags; 1090 __u16 session_flags; 1091 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1092 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1093 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1094 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1095 1096 /* 1097 * Network interfaces available on the server this session is 1098 * connected to. 1099 * 1100 * Other channels can be opened by connecting and binding this 1101 * session to interfaces from this list. 1102 * 1103 * iface_lock should be taken when accessing any of these fields 1104 */ 1105 spinlock_t iface_lock; 1106 /* ========= begin: protected by iface_lock ======== */ 1107 struct list_head iface_list; 1108 size_t iface_count; 1109 unsigned long iface_last_update; /* jiffies */ 1110 /* ========= end: protected by iface_lock ======== */ 1111 1112 spinlock_t chan_lock; 1113 /* ========= begin: protected by chan_lock ======== */ 1114 #define CIFS_MAX_CHANNELS 16 1115 #define CIFS_INVAL_CHAN_INDEX (-1) 1116 #define CIFS_ALL_CHANNELS_SET(ses) \ 1117 ((1UL << (ses)->chan_count) - 1) 1118 #define CIFS_ALL_CHANS_GOOD(ses) \ 1119 (!(ses)->chans_need_reconnect) 1120 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1121 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1122 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1123 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1124 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1125 test_bit((index), &(ses)->chans_need_reconnect) 1126 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1127 ((ses)->chans[(index)].in_reconnect) 1128 1129 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1130 size_t chan_count; 1131 size_t chan_max; 1132 atomic_t chan_seq; /* round robin state */ 1133 1134 /* 1135 * chans_need_reconnect is a bitmap indicating which of the channels 1136 * under this smb session needs to be reconnected. 1137 * If not multichannel session, only one bit will be used. 1138 * 1139 * We will ask for sess and tcon reconnection only if all the 1140 * channels are marked for needing reconnection. This will 1141 * enable the sessions on top to continue to live till any 1142 * of the channels below are active. 1143 */ 1144 unsigned long chans_need_reconnect; 1145 /* ========= end: protected by chan_lock ======== */ 1146 struct cifs_ses *dfs_root_ses; 1147 struct nls_table *local_nls; 1148 }; 1149 1150 static inline bool 1151 cap_unix(struct cifs_ses *ses) 1152 { 1153 return ses->server->vals->cap_unix & ses->capabilities; 1154 } 1155 1156 /* 1157 * common struct for holding inode info when searching for or updating an 1158 * inode with new info 1159 */ 1160 1161 #define CIFS_FATTR_JUNCTION 0x1 1162 #define CIFS_FATTR_DELETE_PENDING 0x2 1163 #define CIFS_FATTR_NEED_REVAL 0x4 1164 #define CIFS_FATTR_INO_COLLISION 0x8 1165 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1166 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1167 1168 struct cifs_fattr { 1169 u32 cf_flags; 1170 u32 cf_cifsattrs; 1171 u64 cf_uniqueid; 1172 u64 cf_eof; 1173 u64 cf_bytes; 1174 u64 cf_createtime; 1175 kuid_t cf_uid; 1176 kgid_t cf_gid; 1177 umode_t cf_mode; 1178 dev_t cf_rdev; 1179 unsigned int cf_nlink; 1180 unsigned int cf_dtype; 1181 struct timespec64 cf_atime; 1182 struct timespec64 cf_mtime; 1183 struct timespec64 cf_ctime; 1184 u32 cf_cifstag; 1185 char *cf_symlink_target; 1186 }; 1187 1188 /* 1189 * there is one of these for each connection to a resource on a particular 1190 * session 1191 */ 1192 struct cifs_tcon { 1193 struct list_head tcon_list; 1194 int debug_id; /* Debugging for tracing */ 1195 int tc_count; 1196 struct list_head rlist; /* reconnect list */ 1197 spinlock_t tc_lock; /* protect anything here that is not protected */ 1198 atomic_t num_local_opens; /* num of all opens including disconnected */ 1199 atomic_t num_remote_opens; /* num of all network opens on server */ 1200 struct list_head openFileList; 1201 spinlock_t open_file_lock; /* protects list above */ 1202 struct cifs_ses *ses; /* pointer to session associated with */ 1203 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1204 char *nativeFileSystem; 1205 char *password; /* for share-level security */ 1206 __u32 tid; /* The 4 byte tree id */ 1207 __u16 Flags; /* optional support bits */ 1208 enum tid_status_enum status; 1209 atomic_t num_smbs_sent; 1210 union { 1211 struct { 1212 atomic_t num_writes; 1213 atomic_t num_reads; 1214 atomic_t num_flushes; 1215 atomic_t num_oplock_brks; 1216 atomic_t num_opens; 1217 atomic_t num_closes; 1218 atomic_t num_deletes; 1219 atomic_t num_mkdirs; 1220 atomic_t num_posixopens; 1221 atomic_t num_posixmkdirs; 1222 atomic_t num_rmdirs; 1223 atomic_t num_renames; 1224 atomic_t num_t2renames; 1225 atomic_t num_ffirst; 1226 atomic_t num_fnext; 1227 atomic_t num_fclose; 1228 atomic_t num_hardlinks; 1229 atomic_t num_symlinks; 1230 atomic_t num_locks; 1231 atomic_t num_acl_get; 1232 atomic_t num_acl_set; 1233 } cifs_stats; 1234 struct { 1235 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1236 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1237 } smb2_stats; 1238 } stats; 1239 __u64 bytes_read; 1240 __u64 bytes_written; 1241 spinlock_t stat_lock; /* protects the two fields above */ 1242 time64_t stats_from_time; 1243 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1244 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1245 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1246 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1247 bool pipe:1; /* set if connection to pipe share */ 1248 bool print:1; /* set if connection to printer share */ 1249 bool retry:1; 1250 bool nocase:1; 1251 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1252 bool nodelete:1; 1253 bool seal:1; /* transport encryption for this mounted share */ 1254 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1255 for this mount even if server would support */ 1256 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1257 bool local_lease:1; /* check leases (only) on local system not remote */ 1258 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1259 bool broken_sparse_sup; /* if server or share does not support sparse */ 1260 bool need_reconnect:1; /* connection reset, tid now invalid */ 1261 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1262 bool use_resilient:1; /* use resilient instead of durable handles */ 1263 bool use_persistent:1; /* use persistent instead of durable handles */ 1264 bool no_lease:1; /* Do not request leases on files or directories */ 1265 bool use_witness:1; /* use witness protocol */ 1266 __le32 capabilities; 1267 __u32 share_flags; 1268 __u32 maximal_access; 1269 __u32 vol_serial_number; 1270 __le64 vol_create_time; 1271 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1272 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1273 __u32 ss_flags; /* sector size flags */ 1274 __u32 perf_sector_size; /* best sector size for perf */ 1275 __u32 max_chunks; 1276 __u32 max_bytes_chunk; 1277 __u32 max_bytes_copy; 1278 __u32 max_cached_dirs; 1279 #ifdef CONFIG_CIFS_FSCACHE 1280 u64 resource_id; /* server resource id */ 1281 bool fscache_acquired; /* T if we've tried acquiring a cookie */ 1282 struct fscache_volume *fscache; /* cookie for share */ 1283 struct mutex fscache_lock; /* Prevent regetting a cookie */ 1284 #endif 1285 struct list_head pending_opens; /* list of incomplete opens */ 1286 struct cached_fids *cfids; 1287 /* BB add field for back pointer to sb struct(s)? */ 1288 #ifdef CONFIG_CIFS_DFS_UPCALL 1289 struct delayed_work dfs_cache_work; 1290 #endif 1291 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1292 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1293 }; 1294 1295 /* 1296 * This is a refcounted and timestamped container for a tcon pointer. The 1297 * container holds a tcon reference. It is considered safe to free one of 1298 * these when the tl_count goes to 0. The tl_time is the time of the last 1299 * "get" on the container. 1300 */ 1301 struct tcon_link { 1302 struct rb_node tl_rbnode; 1303 kuid_t tl_uid; 1304 unsigned long tl_flags; 1305 #define TCON_LINK_MASTER 0 1306 #define TCON_LINK_PENDING 1 1307 #define TCON_LINK_IN_TREE 2 1308 unsigned long tl_time; 1309 atomic_t tl_count; 1310 struct cifs_tcon *tl_tcon; 1311 }; 1312 1313 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1314 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1315 1316 static inline struct cifs_tcon * 1317 tlink_tcon(struct tcon_link *tlink) 1318 { 1319 return tlink->tl_tcon; 1320 } 1321 1322 static inline struct tcon_link * 1323 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1324 { 1325 return cifs_sb->master_tlink; 1326 } 1327 1328 extern void cifs_put_tlink(struct tcon_link *tlink); 1329 1330 static inline struct tcon_link * 1331 cifs_get_tlink(struct tcon_link *tlink) 1332 { 1333 if (tlink && !IS_ERR(tlink)) 1334 atomic_inc(&tlink->tl_count); 1335 return tlink; 1336 } 1337 1338 /* This function is always expected to succeed */ 1339 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1340 1341 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1342 1343 struct cifs_pending_open { 1344 struct list_head olist; 1345 struct tcon_link *tlink; 1346 __u8 lease_key[16]; 1347 __u32 oplock; 1348 }; 1349 1350 struct cifs_deferred_close { 1351 struct list_head dlist; 1352 struct tcon_link *tlink; 1353 __u16 netfid; 1354 __u64 persistent_fid; 1355 __u64 volatile_fid; 1356 }; 1357 1358 /* 1359 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1360 * This is used to track byte stream locks on the file 1361 */ 1362 struct cifsLockInfo { 1363 struct list_head llist; /* pointer to next cifsLockInfo */ 1364 struct list_head blist; /* pointer to locks blocked on this */ 1365 wait_queue_head_t block_q; 1366 __u64 offset; 1367 __u64 length; 1368 __u32 pid; 1369 __u16 type; 1370 __u16 flags; 1371 }; 1372 1373 /* 1374 * One of these for each open instance of a file 1375 */ 1376 struct cifs_search_info { 1377 loff_t index_of_last_entry; 1378 __u16 entries_in_buffer; 1379 __u16 info_level; 1380 __u32 resume_key; 1381 char *ntwrk_buf_start; 1382 char *srch_entries_start; 1383 char *last_entry; 1384 const char *presume_name; 1385 unsigned int resume_name_len; 1386 bool endOfSearch:1; 1387 bool emptyDir:1; 1388 bool unicode:1; 1389 bool smallBuf:1; /* so we know which buf_release function to call */ 1390 }; 1391 1392 #define ACL_NO_MODE ((umode_t)(-1)) 1393 struct cifs_open_parms { 1394 struct cifs_tcon *tcon; 1395 struct cifs_sb_info *cifs_sb; 1396 int disposition; 1397 int desired_access; 1398 int create_options; 1399 const char *path; 1400 struct cifs_fid *fid; 1401 umode_t mode; 1402 bool reconnect:1; 1403 bool replay:1; /* indicates that this open is for a replay */ 1404 struct kvec *ea_cctx; 1405 }; 1406 1407 struct cifs_fid { 1408 __u16 netfid; 1409 __u64 persistent_fid; /* persist file id for smb2 */ 1410 __u64 volatile_fid; /* volatile file id for smb2 */ 1411 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1412 __u8 create_guid[16]; 1413 __u32 access; 1414 struct cifs_pending_open *pending_open; 1415 unsigned int epoch; 1416 #ifdef CONFIG_CIFS_DEBUG2 1417 __u64 mid; 1418 #endif /* CIFS_DEBUG2 */ 1419 bool purge_cache; 1420 }; 1421 1422 struct cifs_fid_locks { 1423 struct list_head llist; 1424 struct cifsFileInfo *cfile; /* fid that owns locks */ 1425 struct list_head locks; /* locks held by fid above */ 1426 }; 1427 1428 struct cifsFileInfo { 1429 /* following two lists are protected by tcon->open_file_lock */ 1430 struct list_head tlist; /* pointer to next fid owned by tcon */ 1431 struct list_head flist; /* next fid (file instance) for this inode */ 1432 /* lock list below protected by cifsi->lock_sem */ 1433 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1434 kuid_t uid; /* allows finding which FileInfo structure */ 1435 __u32 pid; /* process id who opened file */ 1436 struct cifs_fid fid; /* file id from remote */ 1437 struct list_head rlist; /* reconnect list */ 1438 /* BB add lock scope info here if needed */ 1439 /* lock scope id (0 if none) */ 1440 struct dentry *dentry; 1441 struct tcon_link *tlink; 1442 unsigned int f_flags; 1443 bool invalidHandle:1; /* file closed via session abend */ 1444 bool swapfile:1; 1445 bool oplock_break_cancelled:1; 1446 bool status_file_deleted:1; /* file has been deleted */ 1447 bool offload:1; /* offload final part of _put to a wq */ 1448 unsigned int oplock_epoch; /* epoch from the lease break */ 1449 __u32 oplock_level; /* oplock/lease level from the lease break */ 1450 int count; 1451 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1452 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1453 struct cifs_search_info srch_inf; 1454 struct work_struct oplock_break; /* work for oplock breaks */ 1455 struct work_struct put; /* work for the final part of _put */ 1456 struct work_struct serverclose; /* work for serverclose */ 1457 struct delayed_work deferred; 1458 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1459 char *symlink_target; 1460 }; 1461 1462 struct cifs_io_parms { 1463 __u16 netfid; 1464 __u64 persistent_fid; /* persist file id for smb2 */ 1465 __u64 volatile_fid; /* volatile file id for smb2 */ 1466 __u32 pid; 1467 __u64 offset; 1468 unsigned int length; 1469 struct cifs_tcon *tcon; 1470 struct TCP_Server_Info *server; 1471 }; 1472 1473 struct cifs_io_request { 1474 struct netfs_io_request rreq; 1475 struct cifsFileInfo *cfile; 1476 struct TCP_Server_Info *server; 1477 pid_t pid; 1478 }; 1479 1480 /* asynchronous read support */ 1481 struct cifs_io_subrequest { 1482 union { 1483 struct netfs_io_subrequest subreq; 1484 struct netfs_io_request *rreq; 1485 struct cifs_io_request *req; 1486 }; 1487 ssize_t got_bytes; 1488 unsigned int xid; 1489 int result; 1490 bool have_xid; 1491 bool replay; 1492 struct kvec iov[2]; 1493 struct TCP_Server_Info *server; 1494 #ifdef CONFIG_CIFS_SMB_DIRECT 1495 struct smbd_mr *mr; 1496 #endif 1497 struct cifs_credits credits; 1498 }; 1499 1500 /* 1501 * Take a reference on the file private data. Must be called with 1502 * cfile->file_info_lock held. 1503 */ 1504 static inline void 1505 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1506 { 1507 ++cifs_file->count; 1508 } 1509 1510 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1511 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1512 bool offload); 1513 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1514 1515 #define CIFS_CACHE_READ_FLG 1 1516 #define CIFS_CACHE_HANDLE_FLG 2 1517 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1518 #define CIFS_CACHE_WRITE_FLG 4 1519 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1520 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1521 1522 #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)) 1523 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1524 #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)) 1525 1526 /* 1527 * One of these for each file inode 1528 */ 1529 1530 struct cifsInodeInfo { 1531 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1532 bool can_cache_brlcks; 1533 struct list_head llist; /* locks helb by this inode */ 1534 /* 1535 * NOTE: Some code paths call down_read(lock_sem) twice, so 1536 * we must always use cifs_down_write() instead of down_write() 1537 * for this semaphore to avoid deadlocks. 1538 */ 1539 struct rw_semaphore lock_sem; /* protect the fields above */ 1540 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1541 struct list_head openFileList; 1542 spinlock_t open_file_lock; /* protects openFileList */ 1543 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1544 unsigned int oplock; /* oplock/lease level we have */ 1545 unsigned int epoch; /* used to track lease state changes */ 1546 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1547 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1548 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1549 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1550 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1551 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1552 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1553 unsigned long flags; 1554 spinlock_t writers_lock; 1555 unsigned int writers; /* Number of writers on this inode */ 1556 unsigned long time; /* jiffies of last update of inode */ 1557 u64 uniqueid; /* server inode number */ 1558 u64 createtime; /* creation time on server */ 1559 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1560 struct list_head deferred_closes; /* list of deferred closes */ 1561 spinlock_t deferred_lock; /* protection on deferred list */ 1562 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1563 char *symlink_target; 1564 __u32 reparse_tag; 1565 }; 1566 1567 static inline struct cifsInodeInfo * 1568 CIFS_I(struct inode *inode) 1569 { 1570 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1571 } 1572 1573 static inline struct cifs_sb_info * 1574 CIFS_SB(struct super_block *sb) 1575 { 1576 return sb->s_fs_info; 1577 } 1578 1579 static inline struct cifs_sb_info * 1580 CIFS_FILE_SB(struct file *file) 1581 { 1582 return CIFS_SB(file_inode(file)->i_sb); 1583 } 1584 1585 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1586 { 1587 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1588 return '/'; 1589 else 1590 return '\\'; 1591 } 1592 1593 static inline void 1594 convert_delimiter(char *path, char delim) 1595 { 1596 char old_delim, *pos; 1597 1598 if (delim == '/') 1599 old_delim = '\\'; 1600 else 1601 old_delim = '/'; 1602 1603 pos = path; 1604 while ((pos = strchr(pos, old_delim))) 1605 *pos = delim; 1606 } 1607 1608 #define cifs_stats_inc atomic_inc 1609 1610 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1611 unsigned int bytes) 1612 { 1613 if (bytes) { 1614 spin_lock(&tcon->stat_lock); 1615 tcon->bytes_written += bytes; 1616 spin_unlock(&tcon->stat_lock); 1617 } 1618 } 1619 1620 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1621 unsigned int bytes) 1622 { 1623 spin_lock(&tcon->stat_lock); 1624 tcon->bytes_read += bytes; 1625 spin_unlock(&tcon->stat_lock); 1626 } 1627 1628 1629 /* 1630 * This is the prototype for the mid receive function. This function is for 1631 * receiving the rest of the SMB frame, starting with the WordCount (which is 1632 * just after the MID in struct smb_hdr). Note: 1633 * 1634 * - This will be called by cifsd, with no locks held. 1635 * - The mid will still be on the pending_mid_q. 1636 * - mid->resp_buf will point to the current buffer. 1637 * 1638 * Returns zero on a successful receive, or an error. The receive state in 1639 * the TCP_Server_Info will also be updated. 1640 */ 1641 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1642 struct mid_q_entry *mid); 1643 1644 /* 1645 * This is the prototype for the mid callback function. This is called once the 1646 * mid has been received off of the socket. When creating one, take special 1647 * care to avoid deadlocks. Things to bear in mind: 1648 * 1649 * - it will be called by cifsd, with no locks held 1650 * - the mid will be removed from any lists 1651 */ 1652 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1653 1654 /* 1655 * This is the protopyte for mid handle function. This is called once the mid 1656 * has been recognized after decryption of the message. 1657 */ 1658 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1659 struct mid_q_entry *mid); 1660 1661 /* one of these for every pending CIFS request to the server */ 1662 struct mid_q_entry { 1663 struct list_head qhead; /* mids waiting on reply from this server */ 1664 struct kref refcount; 1665 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1666 __u64 mid; /* multiplex id */ 1667 __u16 credits; /* number of credits consumed by this mid */ 1668 __u16 credits_received; /* number of credits from the response */ 1669 __u32 pid; /* process id */ 1670 __u32 sequence_number; /* for CIFS signing */ 1671 unsigned long when_alloc; /* when mid was created */ 1672 #ifdef CONFIG_CIFS_STATS2 1673 unsigned long when_sent; /* time when smb send finished */ 1674 unsigned long when_received; /* when demux complete (taken off wire) */ 1675 #endif 1676 mid_receive_t *receive; /* call receive callback */ 1677 mid_callback_t *callback; /* call completion callback */ 1678 mid_handle_t *handle; /* call handle mid callback */ 1679 void *callback_data; /* general purpose pointer for callback */ 1680 struct task_struct *creator; 1681 void *resp_buf; /* pointer to received SMB header */ 1682 unsigned int resp_buf_size; 1683 int mid_state; /* wish this were enum but can not pass to wait_event */ 1684 unsigned int mid_flags; 1685 __le16 command; /* smb command code */ 1686 unsigned int optype; /* operation type */ 1687 bool large_buf:1; /* if valid response, is pointer to large buf */ 1688 bool multiRsp:1; /* multiple trans2 responses for one request */ 1689 bool multiEnd:1; /* both received */ 1690 bool decrypted:1; /* decrypted entry */ 1691 }; 1692 1693 struct close_cancelled_open { 1694 struct cifs_fid fid; 1695 struct cifs_tcon *tcon; 1696 struct work_struct work; 1697 __u64 mid; 1698 __u16 cmd; 1699 }; 1700 1701 /* Make code in transport.c a little cleaner by moving 1702 update of optional stats into function below */ 1703 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1704 { 1705 atomic_inc(&server->in_send); 1706 } 1707 1708 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1709 { 1710 atomic_dec(&server->in_send); 1711 } 1712 1713 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1714 { 1715 atomic_inc(&server->num_waiters); 1716 } 1717 1718 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1719 { 1720 atomic_dec(&server->num_waiters); 1721 } 1722 1723 #ifdef CONFIG_CIFS_STATS2 1724 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1725 { 1726 mid->when_sent = jiffies; 1727 } 1728 #else 1729 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1730 { 1731 } 1732 #endif 1733 1734 /* for pending dnotify requests */ 1735 struct dir_notify_req { 1736 struct list_head lhead; 1737 __le16 Pid; 1738 __le16 PidHigh; 1739 __u16 Mid; 1740 __u16 Tid; 1741 __u16 Uid; 1742 __u16 netfid; 1743 __u32 filter; /* CompletionFilter (for multishot) */ 1744 int multishot; 1745 struct file *pfile; 1746 }; 1747 1748 struct dfs_info3_param { 1749 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1750 int path_consumed; 1751 int server_type; 1752 int ref_flag; 1753 char *path_name; 1754 char *node_name; 1755 int ttl; 1756 }; 1757 1758 struct file_list { 1759 struct list_head list; 1760 struct cifsFileInfo *cfile; 1761 }; 1762 1763 struct cifs_mount_ctx { 1764 struct cifs_sb_info *cifs_sb; 1765 struct smb3_fs_context *fs_ctx; 1766 unsigned int xid; 1767 struct TCP_Server_Info *server; 1768 struct cifs_ses *ses; 1769 struct cifs_tcon *tcon; 1770 }; 1771 1772 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1773 { 1774 kfree(param->path_name); 1775 kfree(param->node_name); 1776 } 1777 1778 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1779 { 1780 if (param) 1781 __free_dfs_info_param(param); 1782 } 1783 1784 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1785 { 1786 if (param) { 1787 __free_dfs_info_param(param); 1788 memset(param, 0, sizeof(*param)); 1789 } 1790 } 1791 1792 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1793 int number_of_items) 1794 { 1795 int i; 1796 1797 if ((number_of_items == 0) || (param == NULL)) 1798 return; 1799 for (i = 0; i < number_of_items; i++) { 1800 kfree(param[i].path_name); 1801 kfree(param[i].node_name); 1802 } 1803 kfree(param); 1804 } 1805 1806 static inline bool is_interrupt_error(int error) 1807 { 1808 switch (error) { 1809 case -EINTR: 1810 case -ERESTARTSYS: 1811 case -ERESTARTNOHAND: 1812 case -ERESTARTNOINTR: 1813 return true; 1814 } 1815 return false; 1816 } 1817 1818 static inline bool is_retryable_error(int error) 1819 { 1820 if (is_interrupt_error(error) || error == -EAGAIN) 1821 return true; 1822 return false; 1823 } 1824 1825 static inline bool is_replayable_error(int error) 1826 { 1827 if (error == -EAGAIN || error == -ECONNABORTED) 1828 return true; 1829 return false; 1830 } 1831 1832 1833 /* cifs_get_writable_file() flags */ 1834 #define FIND_WR_ANY 0 1835 #define FIND_WR_FSUID_ONLY 1 1836 #define FIND_WR_WITH_DELETE 2 1837 1838 #define MID_FREE 0 1839 #define MID_REQUEST_ALLOCATED 1 1840 #define MID_REQUEST_SUBMITTED 2 1841 #define MID_RESPONSE_RECEIVED 4 1842 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1843 #define MID_RESPONSE_MALFORMED 0x10 1844 #define MID_SHUTDOWN 0x20 1845 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1846 1847 /* Flags */ 1848 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1849 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1850 1851 /* Types of response buffer returned from SendReceive2 */ 1852 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1853 #define CIFS_SMALL_BUFFER 1 1854 #define CIFS_LARGE_BUFFER 2 1855 #define CIFS_IOVEC 4 /* array of response buffers */ 1856 1857 /* Type of Request to SendReceive2 */ 1858 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1859 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1860 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1861 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1862 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1863 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1864 1865 /* Type of request operation */ 1866 #define CIFS_ECHO_OP 0x080 /* echo request */ 1867 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1868 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1869 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1870 /* Lower bitmask values are reserved by others below. */ 1871 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1872 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1873 1874 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1875 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1876 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1877 #define CIFS_COMPRESS_REQ 0x4000 /* compress request before sending */ 1878 1879 /* Security Flags: indicate type of session setup needed */ 1880 #define CIFSSEC_MAY_SIGN 0x00001 1881 #define CIFSSEC_MAY_NTLMV2 0x00004 1882 #define CIFSSEC_MAY_KRB5 0x00008 1883 #define CIFSSEC_MAY_SEAL 0x00040 1884 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1885 1886 #define CIFSSEC_MUST_SIGN 0x01001 1887 /* note that only one of the following can be set so the 1888 result of setting MUST flags more than once will be to 1889 require use of the stronger protocol */ 1890 #define CIFSSEC_MUST_NTLMV2 0x04004 1891 #define CIFSSEC_MUST_KRB5 0x08008 1892 #ifdef CONFIG_CIFS_UPCALL 1893 #define CIFSSEC_MASK 0xCF0CF /* flags supported if no weak allowed */ 1894 #else 1895 #define CIFSSEC_MASK 0xC70C7 /* flags supported if no weak allowed */ 1896 #endif /* UPCALL */ 1897 #define CIFSSEC_MUST_SEAL 0x40040 1898 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1899 1900 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP | CIFSSEC_MAY_SEAL) 1901 #define CIFSSEC_MAX (CIFSSEC_MAY_SIGN | CIFSSEC_MUST_KRB5 | CIFSSEC_MAY_SEAL) 1902 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1903 /* 1904 ***************************************************************** 1905 * All constants go here 1906 ***************************************************************** 1907 */ 1908 1909 #define UID_HASH (16) 1910 1911 /* 1912 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1913 * following to be declared. 1914 */ 1915 1916 /**************************************************************************** 1917 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1918 * to the locking order. i.e. if two locks are to be held together, the lock that 1919 * appears higher in this list needs to be taken before the other. 1920 * 1921 * If you hold a lock that is lower in this list, and you need to take a higher lock 1922 * (or if you think that one of the functions that you're calling may need to), first 1923 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1924 * ensure that locks are picked up only in one direction in the below table 1925 * (top to bottom). 1926 * 1927 * Also, if you expect a function to be called with a lock held, explicitly document 1928 * this in the comments on top of your function definition. 1929 * 1930 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1931 * possible. Blocking / calling other functions with a lock held always increase 1932 * the risk of a possible deadlock. 1933 * 1934 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1935 * debug. Also, any new lock that you introduce, please add to this list in the correct 1936 * order. 1937 * 1938 * Please populate this list whenever you introduce new locks in your changes. Or in 1939 * case I've missed some existing locks. Please ensure that it's added in the list 1940 * based on the locking order expected. 1941 * 1942 * ===================================================================================== 1943 * Lock Protects Initialization fn 1944 * ===================================================================================== 1945 * vol_list_lock 1946 * vol_info->ctx_lock vol_info->ctx 1947 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1948 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1949 * reconnect_mutex 1950 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1951 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1952 * cifs_tcon 1953 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1954 * cifs_tcon->pending_opens 1955 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1956 * cifs_tcon->bytes_written 1957 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1958 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1959 * GlobalCurrentXid 1960 * GlobalTotalActiveXid 1961 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1962 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1963 * ->CurrentMid 1964 * (any changes in mid_q_entry fields) 1965 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1966 * ->credits 1967 * ->echo_credits 1968 * ->oplock_credits 1969 * ->reconnect_instance 1970 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1971 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1972 * ->iface_count 1973 * ->iface_last_update 1974 * cifs_ses->chan_lock cifs_ses->chans 1975 * ->chans_need_reconnect 1976 * ->chans_in_reconnect 1977 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1978 * inode->i_rwsem, taken by fs/netfs/locking.c e.g. should be taken before cifsInodeInfo locks 1979 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1980 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1981 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1982 * ->can_cache_brlcks 1983 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1984 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1985 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1986 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1987 * ->invalidHandle initiate_cifs_search 1988 * ->oplock_break_cancelled 1989 ****************************************************************************/ 1990 1991 #ifdef DECLARE_GLOBALS_HERE 1992 #define GLOBAL_EXTERN 1993 #else 1994 #define GLOBAL_EXTERN extern 1995 #endif 1996 1997 /* 1998 * the list of TCP_Server_Info structures, ie each of the sockets 1999 * connecting our client to a distinct server (ip address), is 2000 * chained together by cifs_tcp_ses_list. The list of all our SMB 2001 * sessions (and from that the tree connections) can be found 2002 * by iterating over cifs_tcp_ses_list 2003 */ 2004 extern struct list_head cifs_tcp_ses_list; 2005 2006 /* 2007 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 2008 * tcp session, and the list of tcon's per smb session. It also protects 2009 * the reference counters for the server, smb session, and tcon. 2010 * generally the locks should be taken in order tcp_ses_lock before 2011 * tcon->open_file_lock and that before file->file_info_lock since the 2012 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 2013 */ 2014 extern spinlock_t cifs_tcp_ses_lock; 2015 2016 /* 2017 * Global transaction id (XID) information 2018 */ 2019 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Lock */ 2020 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Lock */ 2021 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Lock */ 2022 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2023 2024 /* 2025 * Global counters, updated atomically 2026 */ 2027 extern atomic_t sesInfoAllocCount; 2028 extern atomic_t tconInfoAllocCount; 2029 extern atomic_t tcpSesNextId; 2030 extern atomic_t tcpSesAllocCount; 2031 extern atomic_t tcpSesReconnectCount; 2032 extern atomic_t tconInfoReconnectCount; 2033 2034 /* Various Debug counters */ 2035 extern atomic_t buf_alloc_count; /* current number allocated */ 2036 extern atomic_t small_buf_alloc_count; 2037 #ifdef CONFIG_CIFS_STATS2 2038 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2039 extern atomic_t total_small_buf_alloc_count; 2040 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2041 #endif 2042 2043 /* Misc globals */ 2044 extern bool enable_oplocks; /* enable or disable oplocks */ 2045 extern bool lookupCacheEnabled; 2046 extern unsigned int global_secflags; /* if on, session setup sent 2047 with more secure ntlmssp2 challenge/resp */ 2048 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2049 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2050 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2051 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2052 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2053 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2054 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2055 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2056 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2057 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2058 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2059 extern atomic_t mid_count; 2060 2061 void cifs_oplock_break(struct work_struct *work); 2062 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2063 void smb2_deferred_work_close(struct work_struct *work); 2064 2065 extern const struct slow_work_ops cifs_oplock_break_ops; 2066 extern struct workqueue_struct *cifsiod_wq; 2067 extern struct workqueue_struct *decrypt_wq; 2068 extern struct workqueue_struct *fileinfo_put_wq; 2069 extern struct workqueue_struct *cifsoplockd_wq; 2070 extern struct workqueue_struct *deferredclose_wq; 2071 extern struct workqueue_struct *serverclose_wq; 2072 extern __u32 cifs_lock_secret; 2073 2074 extern mempool_t *cifs_sm_req_poolp; 2075 extern mempool_t *cifs_req_poolp; 2076 extern mempool_t *cifs_mid_poolp; 2077 extern mempool_t cifs_io_request_pool; 2078 extern mempool_t cifs_io_subrequest_pool; 2079 2080 /* Operations for different SMB versions */ 2081 #define SMB1_VERSION_STRING "1.0" 2082 #define SMB20_VERSION_STRING "2.0" 2083 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2084 extern struct smb_version_operations smb1_operations; 2085 extern struct smb_version_values smb1_values; 2086 extern struct smb_version_operations smb20_operations; 2087 extern struct smb_version_values smb20_values; 2088 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2089 #define SMB21_VERSION_STRING "2.1" 2090 extern struct smb_version_operations smb21_operations; 2091 extern struct smb_version_values smb21_values; 2092 #define SMBDEFAULT_VERSION_STRING "default" 2093 extern struct smb_version_values smbdefault_values; 2094 #define SMB3ANY_VERSION_STRING "3" 2095 extern struct smb_version_values smb3any_values; 2096 #define SMB30_VERSION_STRING "3.0" 2097 extern struct smb_version_operations smb30_operations; 2098 extern struct smb_version_values smb30_values; 2099 #define SMB302_VERSION_STRING "3.02" 2100 #define ALT_SMB302_VERSION_STRING "3.0.2" 2101 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2102 extern struct smb_version_values smb302_values; 2103 #define SMB311_VERSION_STRING "3.1.1" 2104 #define ALT_SMB311_VERSION_STRING "3.11" 2105 extern struct smb_version_operations smb311_operations; 2106 extern struct smb_version_values smb311_values; 2107 2108 static inline char *get_security_type_str(enum securityEnum sectype) 2109 { 2110 switch (sectype) { 2111 case RawNTLMSSP: 2112 return "RawNTLMSSP"; 2113 case Kerberos: 2114 return "Kerberos"; 2115 case NTLMv2: 2116 return "NTLMv2"; 2117 default: 2118 return "Unknown"; 2119 } 2120 } 2121 2122 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2123 { 2124 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2125 } 2126 2127 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2128 { 2129 /* 2130 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2131 * Subsystem Notifies That a Share Is a DFS Share. 2132 * 2133 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2134 * Application Updates a Share. 2135 */ 2136 if (!tcon || !tcon->ses || !tcon->ses->server) 2137 return false; 2138 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2139 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2140 } 2141 2142 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2143 const struct dfs_info3_param *ref) 2144 { 2145 /* 2146 * Check if all targets are capable of handling DFS referrals as per 2147 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2148 */ 2149 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2150 } 2151 2152 static inline u64 cifs_flock_len(const struct file_lock *fl) 2153 { 2154 return (u64)fl->fl_end - fl->fl_start + 1; 2155 } 2156 2157 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2158 { 2159 if (WARN_ON_ONCE(!ses || !ses->server)) 2160 return 0; 2161 /* 2162 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2163 * servers do require it during NTLMSSP. 2164 */ 2165 if (ses->server->dialect <= SMB20_PROT_ID) 2166 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2167 return sizeof(ses->workstation_name); 2168 } 2169 2170 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2171 { 2172 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2173 dst->AccessFlags = src->AccessFlags; 2174 dst->CurrentByteOffset = src->CurrentByteOffset; 2175 dst->Mode = src->Mode; 2176 dst->AlignmentRequirement = src->AlignmentRequirement; 2177 dst->FileNameLength = src->FileNameLength; 2178 } 2179 2180 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2181 int num_rqst, 2182 const u8 *sig) 2183 { 2184 unsigned int len, skip; 2185 unsigned int nents = 0; 2186 unsigned long addr; 2187 size_t data_size; 2188 int i, j; 2189 2190 /* 2191 * The first rqst has a transform header where the first 20 bytes are 2192 * not part of the encrypted blob. 2193 */ 2194 skip = 20; 2195 2196 /* Assumes the first rqst has a transform header as the first iov. 2197 * I.e. 2198 * rqst[0].rq_iov[0] is transform header 2199 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2200 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2201 */ 2202 for (i = 0; i < num_rqst; i++) { 2203 data_size = iov_iter_count(&rqst[i].rq_iter); 2204 2205 /* We really don't want a mixture of pinned and unpinned pages 2206 * in the sglist. It's hard to keep track of which is what. 2207 * Instead, we convert to a BVEC-type iterator higher up. 2208 */ 2209 if (data_size && 2210 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2211 return -EIO; 2212 2213 /* We also don't want to have any extra refs or pins to clean 2214 * up in the sglist. 2215 */ 2216 if (data_size && 2217 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2218 return -EIO; 2219 2220 for (j = 0; j < rqst[i].rq_nvec; j++) { 2221 struct kvec *iov = &rqst[i].rq_iov[j]; 2222 2223 addr = (unsigned long)iov->iov_base + skip; 2224 if (unlikely(is_vmalloc_addr((void *)addr))) { 2225 len = iov->iov_len - skip; 2226 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2227 PAGE_SIZE); 2228 } else { 2229 nents++; 2230 } 2231 skip = 0; 2232 } 2233 if (data_size) 2234 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2235 } 2236 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2237 return nents; 2238 } 2239 2240 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2241 * stack object as buf. 2242 */ 2243 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2244 const void *buf, 2245 unsigned int buflen) 2246 { 2247 unsigned long addr = (unsigned long)buf; 2248 unsigned int off = offset_in_page(addr); 2249 2250 addr &= PAGE_MASK; 2251 if (unlikely(is_vmalloc_addr((void *)addr))) { 2252 do { 2253 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2254 2255 sg_set_page(&sgtable->sgl[sgtable->nents++], 2256 vmalloc_to_page((void *)addr), len, off); 2257 2258 off = 0; 2259 addr += PAGE_SIZE; 2260 buflen -= len; 2261 } while (buflen); 2262 } else { 2263 sg_set_page(&sgtable->sgl[sgtable->nents++], 2264 virt_to_page((void *)addr), buflen, off); 2265 } 2266 } 2267 2268 #define CIFS_OPARMS(_cifs_sb, _tcon, _path, _da, _cd, _co, _mode) \ 2269 ((struct cifs_open_parms) { \ 2270 .tcon = _tcon, \ 2271 .path = _path, \ 2272 .desired_access = (_da), \ 2273 .disposition = (_cd), \ 2274 .create_options = cifs_create_options(_cifs_sb, (_co)), \ 2275 .mode = (_mode), \ 2276 .cifs_sb = _cifs_sb, \ 2277 }) 2278 2279 struct smb2_compound_vars { 2280 struct cifs_open_parms oparms; 2281 struct kvec rsp_iov[MAX_COMPOUND]; 2282 struct smb_rqst rqst[MAX_COMPOUND]; 2283 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2284 struct kvec qi_iov; 2285 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2286 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2287 struct kvec close_iov; 2288 struct smb2_file_rename_info rename_info; 2289 struct smb2_file_link_info link_info; 2290 struct kvec ea_iov; 2291 }; 2292 2293 static inline bool cifs_ses_exiting(struct cifs_ses *ses) 2294 { 2295 bool ret; 2296 2297 spin_lock(&ses->ses_lock); 2298 ret = ses->ses_status == SES_EXITING; 2299 spin_unlock(&ses->ses_lock); 2300 return ret; 2301 } 2302 2303 #endif /* _CIFS_GLOB_H */ 2304