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