1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002,2008 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * Jeremy Allison (jra@samba.org) 7 * 8 */ 9 #ifndef _CIFS_GLOB_H 10 #define _CIFS_GLOB_H 11 12 #include <linux/in.h> 13 #include <linux/in6.h> 14 #include <linux/inet.h> 15 #include <linux/slab.h> 16 #include <linux/scatterlist.h> 17 #include <linux/mm.h> 18 #include <linux/mempool.h> 19 #include <linux/workqueue.h> 20 #include <linux/utsname.h> 21 #include <linux/sched/mm.h> 22 #include <linux/netfs.h> 23 #include "cifs_fs_sb.h" 24 #include "cifsacl.h" 25 #include <crypto/internal/hash.h> 26 #include <uapi/linux/cifs/cifs_mount.h> 27 #include "../common/smb2pdu.h" 28 #include "smb2pdu.h" 29 #include <linux/filelock.h> 30 31 #define SMB_PATH_MAX 260 32 #define CIFS_PORT 445 33 #define RFC1001_PORT 139 34 35 /* 36 * The sizes of various internal tables and strings 37 */ 38 #define MAX_UID_INFO 16 39 #define MAX_SES_INFO 2 40 #define MAX_TCON_INFO 4 41 42 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) 43 44 #define CIFS_MIN_RCV_POOL 4 45 46 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ 47 /* 48 * default attribute cache timeout (jiffies) 49 */ 50 #define CIFS_DEF_ACTIMEO (1 * HZ) 51 52 /* 53 * max attribute cache timeout (jiffies) - 2^30 54 */ 55 #define CIFS_MAX_ACTIMEO (1 << 30) 56 57 /* 58 * Max persistent and resilient handle timeout (milliseconds). 59 * Windows durable max was 960000 (16 minutes) 60 */ 61 #define SMB3_MAX_HANDLE_TIMEOUT 960000 62 63 /* 64 * MAX_REQ is the maximum number of requests that WE will send 65 * on one socket concurrently. 66 */ 67 #define CIFS_MAX_REQ 32767 68 69 #define RFC1001_NAME_LEN 15 70 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 71 72 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 73 #define SERVER_NAME_LENGTH 80 74 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 75 76 /* echo interval in seconds */ 77 #define SMB_ECHO_INTERVAL_MIN 1 78 #define SMB_ECHO_INTERVAL_MAX 600 79 #define SMB_ECHO_INTERVAL_DEFAULT 60 80 81 /* smb multichannel query server interfaces interval in seconds */ 82 #define SMB_INTERFACE_POLL_INTERVAL 600 83 84 /* maximum number of PDUs in one compound */ 85 #define MAX_COMPOUND 5 86 87 /* 88 * Default number of credits to keep available for SMB3. 89 * This value is chosen somewhat arbitrarily. The Windows client 90 * defaults to 128 credits, the Windows server allows clients up to 91 * 512 credits (or 8K for later versions), and the NetApp server 92 * does not limit clients at all. Choose a high enough default value 93 * such that the client shouldn't limit performance, but allow mount 94 * to override (until you approach 64K, where we limit credits to 65000 95 * to reduce possibility of seeing more server credit overflow bugs. 96 */ 97 #define SMB2_MAX_CREDITS_AVAILABLE 32000 98 99 #include "cifspdu.h" 100 101 #ifndef XATTR_DOS_ATTRIB 102 #define XATTR_DOS_ATTRIB "user.DOSATTRIB" 103 #endif 104 105 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ 106 107 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) 108 109 /* 110 * CIFS vfs client Status information (based on what we know.) 111 */ 112 113 /* associated with each connection */ 114 enum statusEnum { 115 CifsNew = 0, 116 CifsGood, 117 CifsExiting, 118 CifsNeedReconnect, 119 CifsNeedNegotiate, 120 CifsInNegotiate, 121 }; 122 123 /* associated with each smb session */ 124 enum ses_status_enum { 125 SES_NEW = 0, 126 SES_GOOD, 127 SES_EXITING, 128 SES_NEED_RECON, 129 SES_IN_SETUP 130 }; 131 132 /* associated with each tree connection to the server */ 133 enum tid_status_enum { 134 TID_NEW = 0, 135 TID_GOOD, 136 TID_EXITING, 137 TID_NEED_RECON, 138 TID_NEED_TCON, 139 TID_IN_TCON, 140 TID_NEED_FILES_INVALIDATE, /* currently unused */ 141 TID_IN_FILES_INVALIDATE 142 }; 143 144 enum securityEnum { 145 Unspecified = 0, /* not specified */ 146 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 147 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 148 Kerberos, /* Kerberos via SPNEGO */ 149 }; 150 151 struct session_key { 152 unsigned int len; 153 char *response; 154 }; 155 156 /* crypto hashing related structure/fields, not specific to a sec mech */ 157 struct cifs_secmech { 158 struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ 159 struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ 160 struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ 161 struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ 162 struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ 163 164 struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ 165 struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ 166 }; 167 168 /* per smb session structure/fields */ 169 struct ntlmssp_auth { 170 bool sesskey_per_smbsess; /* whether session key is per smb session */ 171 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 172 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 173 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 174 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 175 }; 176 177 struct cifs_cred { 178 int uid; 179 int gid; 180 int mode; 181 int cecount; 182 struct cifs_sid osid; 183 struct cifs_sid gsid; 184 struct cifs_ntace *ntaces; 185 struct cifs_ace *aces; 186 }; 187 188 struct cifs_open_info_data { 189 bool adjust_tz; 190 union { 191 bool reparse_point; 192 bool symlink; 193 }; 194 struct { 195 __u32 tag; 196 union { 197 struct reparse_data_buffer *buf; 198 struct reparse_posix_data *posix; 199 }; 200 } reparse; 201 char *symlink_target; 202 union { 203 struct smb2_file_all_info fi; 204 struct smb311_posix_qinfo posix_fi; 205 }; 206 }; 207 208 #define cifs_open_data_reparse(d) \ 209 ((d)->reparse_point || \ 210 (le32_to_cpu((d)->fi.Attributes) & ATTR_REPARSE)) 211 212 static inline void cifs_free_open_info(struct cifs_open_info_data *data) 213 { 214 kfree(data->symlink_target); 215 } 216 217 /* 218 ***************************************************************** 219 * Except the CIFS PDUs themselves all the 220 * globally interesting structs should go here 221 ***************************************************************** 222 */ 223 224 /* 225 * A smb_rqst represents a complete request to be issued to a server. It's 226 * formed by a kvec array, followed by an array of pages. Page data is assumed 227 * to start at the beginning of the first page. 228 */ 229 struct smb_rqst { 230 struct kvec *rq_iov; /* array of kvecs */ 231 unsigned int rq_nvec; /* number of kvecs in array */ 232 size_t rq_iter_size; /* Amount of data in ->rq_iter */ 233 struct iov_iter rq_iter; /* Data iterator */ 234 struct xarray rq_buffer; /* Page buffer for encryption */ 235 }; 236 237 struct mid_q_entry; 238 struct TCP_Server_Info; 239 struct cifsFileInfo; 240 struct cifs_ses; 241 struct cifs_tcon; 242 struct dfs_info3_param; 243 struct cifs_fattr; 244 struct smb3_fs_context; 245 struct cifs_fid; 246 struct cifs_readdata; 247 struct cifs_writedata; 248 struct cifs_io_parms; 249 struct cifs_search_info; 250 struct cifsInodeInfo; 251 struct cifs_open_parms; 252 struct cifs_credits; 253 254 struct smb_version_operations { 255 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 256 struct mid_q_entry *); 257 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 258 /* setup request: allocate mid, sign message */ 259 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 260 struct TCP_Server_Info *, 261 struct smb_rqst *); 262 /* setup async request: allocate mid, sign message */ 263 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 264 struct smb_rqst *); 265 /* check response: verify signature, map error */ 266 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 267 bool); 268 void (*add_credits)(struct TCP_Server_Info *server, 269 const struct cifs_credits *credits, 270 const int optype); 271 void (*set_credits)(struct TCP_Server_Info *, const int); 272 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 273 unsigned int (*get_credits)(struct mid_q_entry *); 274 __u64 (*get_next_mid)(struct TCP_Server_Info *); 275 void (*revert_current_mid)(struct TCP_Server_Info *server, 276 const unsigned int val); 277 /* data offset from read response message */ 278 unsigned int (*read_data_offset)(char *); 279 /* 280 * Data length from read response message 281 * When in_remaining is true, the returned data length is in 282 * message field DataRemaining for out-of-band data read (e.g through 283 * Memory Registration RDMA write in SMBD). 284 * Otherwise, the returned data length is in message field DataLength. 285 */ 286 unsigned int (*read_data_length)(char *, bool in_remaining); 287 /* map smb to linux error */ 288 int (*map_error)(char *, bool); 289 /* find mid corresponding to the response message */ 290 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 291 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 292 void (*clear_stats)(struct cifs_tcon *); 293 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 294 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 295 /* verify the message */ 296 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 297 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 298 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 299 void (*downgrade_oplock)(struct TCP_Server_Info *server, 300 struct cifsInodeInfo *cinode, __u32 oplock, 301 unsigned int epoch, bool *purge_cache); 302 /* process transaction2 response */ 303 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 304 char *, int); 305 /* check if we need to negotiate */ 306 bool (*need_neg)(struct TCP_Server_Info *); 307 /* negotiate to the server */ 308 int (*negotiate)(const unsigned int xid, 309 struct cifs_ses *ses, 310 struct TCP_Server_Info *server); 311 /* set negotiated write size */ 312 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 313 /* set negotiated read size */ 314 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 315 /* setup smb sessionn */ 316 int (*sess_setup)(const unsigned int, struct cifs_ses *, 317 struct TCP_Server_Info *server, 318 const struct nls_table *); 319 /* close smb session */ 320 int (*logoff)(const unsigned int, struct cifs_ses *); 321 /* connect to a server share */ 322 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 323 struct cifs_tcon *, const struct nls_table *); 324 /* close tree connecion */ 325 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 326 /* get DFS referrals */ 327 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 328 const char *, struct dfs_info3_param **, 329 unsigned int *, const struct nls_table *, int); 330 /* informational QFS call */ 331 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 332 struct cifs_sb_info *); 333 /* check if a path is accessible or not */ 334 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 335 struct cifs_sb_info *, const char *); 336 /* query path data from the server */ 337 int (*query_path_info)(const unsigned int xid, 338 struct cifs_tcon *tcon, 339 struct cifs_sb_info *cifs_sb, 340 const char *full_path, 341 struct cifs_open_info_data *data); 342 /* query file data from the server */ 343 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 344 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 345 /* query reparse point to determine which type of special file */ 346 int (*query_reparse_point)(const unsigned int xid, 347 struct cifs_tcon *tcon, 348 struct cifs_sb_info *cifs_sb, 349 const char *full_path, 350 u32 *tag, struct kvec *rsp, 351 int *rsp_buftype); 352 /* get server index number */ 353 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 354 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 355 struct cifs_open_info_data *data); 356 /* set size by path */ 357 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 358 const char *, __u64, struct cifs_sb_info *, bool); 359 /* set size by file handle */ 360 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 361 struct cifsFileInfo *, __u64, bool); 362 /* set attributes */ 363 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 364 const unsigned int); 365 int (*set_compression)(const unsigned int, struct cifs_tcon *, 366 struct cifsFileInfo *); 367 /* check if we can send an echo or nor */ 368 bool (*can_echo)(struct TCP_Server_Info *); 369 /* send echo request */ 370 int (*echo)(struct TCP_Server_Info *); 371 /* create directory */ 372 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 373 umode_t mode, struct cifs_tcon *tcon, 374 const char *full_path, 375 struct cifs_sb_info *cifs_sb); 376 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 377 struct cifs_tcon *tcon, const char *name, 378 struct cifs_sb_info *sb); 379 /* set info on created directory */ 380 void (*mkdir_setinfo)(struct inode *, const char *, 381 struct cifs_sb_info *, struct cifs_tcon *, 382 const unsigned int); 383 /* remove directory */ 384 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 385 struct cifs_sb_info *); 386 /* unlink file */ 387 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 388 struct cifs_sb_info *); 389 /* open, rename and delete file */ 390 int (*rename_pending_delete)(const char *, struct dentry *, 391 const unsigned int); 392 /* send rename request */ 393 int (*rename)(const unsigned int, struct cifs_tcon *, const char *, 394 const char *, struct cifs_sb_info *); 395 /* send create hardlink request */ 396 int (*create_hardlink)(const unsigned int, struct cifs_tcon *, 397 const char *, const char *, 398 struct cifs_sb_info *); 399 /* query symlink target */ 400 int (*query_symlink)(const unsigned int xid, 401 struct cifs_tcon *tcon, 402 struct cifs_sb_info *cifs_sb, 403 const char *full_path, 404 char **target_path); 405 /* open a file for non-posix mounts */ 406 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 407 void *buf); 408 /* set fid protocol-specific info */ 409 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 410 /* close a file */ 411 void (*close)(const unsigned int, struct cifs_tcon *, 412 struct cifs_fid *); 413 /* close a file, returning file attributes and timestamps */ 414 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 415 struct cifsFileInfo *pfile_info); 416 /* send a flush request to the server */ 417 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 418 /* async read from the server */ 419 int (*async_readv)(struct cifs_readdata *); 420 /* async write to the server */ 421 int (*async_writev)(struct cifs_writedata *, 422 void (*release)(struct kref *)); 423 /* sync read from the server */ 424 int (*sync_read)(const unsigned int, struct cifs_fid *, 425 struct cifs_io_parms *, unsigned int *, char **, 426 int *); 427 /* sync write to the server */ 428 int (*sync_write)(const unsigned int, struct cifs_fid *, 429 struct cifs_io_parms *, unsigned int *, struct kvec *, 430 unsigned long); 431 /* open dir, start readdir */ 432 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 433 const char *, struct cifs_sb_info *, 434 struct cifs_fid *, __u16, 435 struct cifs_search_info *); 436 /* continue readdir */ 437 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 438 struct cifs_fid *, 439 __u16, struct cifs_search_info *srch_inf); 440 /* close dir */ 441 int (*close_dir)(const unsigned int, struct cifs_tcon *, 442 struct cifs_fid *); 443 /* calculate a size of SMB message */ 444 unsigned int (*calc_smb_size)(void *buf); 445 /* check for STATUS_PENDING and process the response if yes */ 446 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 447 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 448 bool (*is_session_expired)(char *); 449 /* send oplock break response */ 450 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 451 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 452 /* query remote filesystem */ 453 int (*queryfs)(const unsigned int, struct cifs_tcon *, 454 struct cifs_sb_info *, struct kstatfs *); 455 /* send mandatory brlock to the server */ 456 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 457 __u64, __u32, int, int, bool); 458 /* unlock range of mandatory locks */ 459 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 460 const unsigned int); 461 /* push brlocks from the cache to the server */ 462 int (*push_mand_locks)(struct cifsFileInfo *); 463 /* get lease key of the inode */ 464 void (*get_lease_key)(struct inode *, struct cifs_fid *); 465 /* set lease key of the inode */ 466 void (*set_lease_key)(struct inode *, struct cifs_fid *); 467 /* generate new lease key */ 468 void (*new_lease_key)(struct cifs_fid *); 469 int (*generate_signingkey)(struct cifs_ses *ses, 470 struct TCP_Server_Info *server); 471 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 472 bool allocate_crypto); 473 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 474 struct cifsFileInfo *src_file); 475 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 476 struct cifsFileInfo *src_file, void __user *); 477 int (*notify)(const unsigned int xid, struct file *pfile, 478 void __user *pbuf, bool return_changes); 479 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 480 struct cifs_sb_info *, const unsigned char *, 481 char *, unsigned int *); 482 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 483 struct cifs_sb_info *, const unsigned char *, 484 char *, unsigned int *); 485 /* if we can do cache read operations */ 486 bool (*is_read_op)(__u32); 487 /* set oplock level for the inode */ 488 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 489 bool *); 490 /* create lease context buffer for CREATE request */ 491 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 492 /* parse lease context buffer and return oplock/epoch info */ 493 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 494 ssize_t (*copychunk_range)(const unsigned int, 495 struct cifsFileInfo *src_file, 496 struct cifsFileInfo *target_file, 497 u64 src_off, u64 len, u64 dest_off); 498 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 499 struct cifsFileInfo *target_file, u64 src_off, u64 len, 500 u64 dest_off); 501 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 502 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 503 const unsigned char *, const unsigned char *, char *, 504 size_t, struct cifs_sb_info *); 505 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 506 const char *, const void *, const __u16, 507 const struct nls_table *, struct cifs_sb_info *); 508 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, 509 const char *, u32 *, u32); 510 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, 511 const struct cifs_fid *, u32 *, u32); 512 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, 513 int); 514 /* writepages retry size */ 515 unsigned int (*wp_retry_size)(struct inode *); 516 /* get mtu credits */ 517 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, 518 unsigned int *, struct cifs_credits *); 519 /* adjust previously taken mtu credits to request size */ 520 int (*adjust_credits)(struct TCP_Server_Info *server, 521 struct cifs_credits *credits, 522 const unsigned int payload_size); 523 /* check if we need to issue closedir */ 524 bool (*dir_needs_close)(struct cifsFileInfo *); 525 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 526 loff_t); 527 /* init transform request - used for encryption for now */ 528 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 529 struct smb_rqst *, struct smb_rqst *); 530 int (*is_transform_hdr)(void *buf); 531 int (*receive_transform)(struct TCP_Server_Info *, 532 struct mid_q_entry **, char **, int *); 533 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 534 enum securityEnum); 535 int (*next_header)(struct TCP_Server_Info *server, char *buf, 536 unsigned int *noff); 537 /* ioctl passthrough for query_info */ 538 int (*ioctl_query_info)(const unsigned int xid, 539 struct cifs_tcon *tcon, 540 struct cifs_sb_info *cifs_sb, 541 __le16 *path, int is_dir, 542 unsigned long p); 543 /* make unix special files (block, char, fifo, socket) */ 544 int (*make_node)(unsigned int xid, 545 struct inode *inode, 546 struct dentry *dentry, 547 struct cifs_tcon *tcon, 548 const char *full_path, 549 umode_t mode, 550 dev_t device_number); 551 /* version specific fiemap implementation */ 552 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 553 struct fiemap_extent_info *, u64, u64); 554 /* version specific llseek implementation */ 555 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 556 /* Check for STATUS_IO_TIMEOUT */ 557 bool (*is_status_io_timeout)(char *buf); 558 /* Check for STATUS_NETWORK_NAME_DELETED */ 559 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 560 int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, 561 struct kvec *rsp_iov, 562 struct cifs_open_info_data *data); 563 }; 564 565 struct smb_version_values { 566 char *version_string; 567 __u16 protocol_id; 568 __u32 req_capabilities; 569 __u32 large_lock_type; 570 __u32 exclusive_lock_type; 571 __u32 shared_lock_type; 572 __u32 unlock_lock_type; 573 size_t header_preamble_size; 574 size_t header_size; 575 size_t max_header_size; 576 size_t read_rsp_size; 577 __le16 lock_cmd; 578 unsigned int cap_unix; 579 unsigned int cap_nt_find; 580 unsigned int cap_large_files; 581 __u16 signing_enabled; 582 __u16 signing_required; 583 size_t create_lease_size; 584 }; 585 586 #define HEADER_SIZE(server) (server->vals->header_size) 587 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 588 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 589 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 590 591 /** 592 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 593 * trying to reuse existing superblock for a new mount 594 */ 595 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 596 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 597 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 598 CIFS_MOUNT_MAP_SFM_CHR | \ 599 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 600 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 601 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 602 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 603 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 604 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 605 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 606 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 607 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 608 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 609 610 /** 611 * Generic VFS superblock mount flags (s_flags) to consider when 612 * trying to reuse existing superblock for a new mount 613 */ 614 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 615 SB_NODEV | SB_SYNCHRONOUS) 616 617 struct cifs_mnt_data { 618 struct cifs_sb_info *cifs_sb; 619 struct smb3_fs_context *ctx; 620 int flags; 621 }; 622 623 static inline unsigned int 624 get_rfc1002_length(void *buf) 625 { 626 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 627 } 628 629 static inline void 630 inc_rfc1001_len(void *buf, int count) 631 { 632 be32_add_cpu((__be32 *)buf, count); 633 } 634 635 struct TCP_Server_Info { 636 struct list_head tcp_ses_list; 637 struct list_head smb_ses_list; 638 spinlock_t srv_lock; /* protect anything here that is not protected */ 639 __u64 conn_id; /* connection identifier (useful for debugging) */ 640 int srv_count; /* reference counter */ 641 /* 15 character server name + 0x20 16th byte indicating type = srv */ 642 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 643 struct smb_version_operations *ops; 644 struct smb_version_values *vals; 645 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 646 enum statusEnum tcpStatus; /* what we think the status is */ 647 char *hostname; /* hostname portion of UNC string */ 648 struct socket *ssocket; 649 struct sockaddr_storage dstaddr; 650 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 651 #ifdef CONFIG_NET_NS 652 struct net *net; 653 #endif 654 wait_queue_head_t response_q; 655 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 656 spinlock_t mid_lock; /* protect mid queue and it's entries */ 657 struct list_head pending_mid_q; 658 bool noblocksnd; /* use blocking sendmsg */ 659 bool noautotune; /* do not autotune send buf sizes */ 660 bool nosharesock; 661 bool tcp_nodelay; 662 bool terminate; 663 unsigned int credits; /* send no more requests at once */ 664 unsigned int max_credits; /* can override large 32000 default at mnt */ 665 unsigned int in_flight; /* number of requests on the wire to server */ 666 unsigned int max_in_flight; /* max number of requests that were on wire */ 667 spinlock_t req_lock; /* protect the two values above */ 668 struct mutex _srv_mutex; 669 unsigned int nofs_flag; 670 struct task_struct *tsk; 671 char server_GUID[16]; 672 __u16 sec_mode; 673 bool sign; /* is signing enabled on this connection? */ 674 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 675 bool session_estab; /* mark when very first sess is established */ 676 int echo_credits; /* echo reserved slots */ 677 int oplock_credits; /* oplock break reserved slots */ 678 bool echoes:1; /* enable echoes */ 679 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 680 u16 dialect; /* dialect index that server chose */ 681 bool oplocks:1; /* enable oplocks */ 682 unsigned int maxReq; /* Clients should submit no more */ 683 /* than maxReq distinct unanswered SMBs to the server when using */ 684 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 685 unsigned int maxBuf; /* maxBuf specifies the maximum */ 686 /* message size the server can send or receive for non-raw SMBs */ 687 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 688 /* when socket is setup (and during reconnect) before NegProt sent */ 689 unsigned int max_rw; /* maxRw specifies the maximum */ 690 /* message size the server can send or receive for */ 691 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 692 unsigned int capabilities; /* selective disabling of caps by smb sess */ 693 int timeAdj; /* Adjust for difference in server time zone in sec */ 694 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 695 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 696 /* 16th byte of RFC1001 workstation name is always null */ 697 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 698 __u32 sequence_number; /* for signing, protected by srv_mutex */ 699 __u32 reconnect_instance; /* incremented on each reconnect */ 700 struct session_key session_key; 701 unsigned long lstrp; /* when we got last response from this server */ 702 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 703 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 704 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 705 char negflavor; /* NEGOTIATE response flavor */ 706 /* extended security flavors that server supports */ 707 bool sec_ntlmssp; /* supports NTLMSSP */ 708 bool sec_kerberosu2u; /* supports U2U Kerberos */ 709 bool sec_kerberos; /* supports plain Kerberos */ 710 bool sec_mskerberos; /* supports legacy MS Kerberos */ 711 bool large_buf; /* is current buffer large? */ 712 /* use SMBD connection instead of socket */ 713 bool rdma; 714 /* point to the SMBD connection if RDMA is used instead of socket */ 715 struct smbd_connection *smbd_conn; 716 struct delayed_work echo; /* echo ping workqueue job */ 717 char *smallbuf; /* pointer to current "small" buffer */ 718 char *bigbuf; /* pointer to current "big" buffer */ 719 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 720 unsigned int pdu_size; 721 unsigned int total_read; /* total amount of data read in this pass */ 722 atomic_t in_send; /* requests trying to send */ 723 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 724 #ifdef CONFIG_CIFS_STATS2 725 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 726 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 727 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 728 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 729 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 730 #endif /* STATS2 */ 731 unsigned int max_read; 732 unsigned int max_write; 733 unsigned int min_offload; 734 __le16 compress_algorithm; 735 __u16 signing_algorithm; 736 __le16 cipher_type; 737 /* save initital negprot hash */ 738 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 739 bool signing_negotiated; /* true if valid signing context rcvd from server */ 740 bool posix_ext_supported; 741 struct delayed_work reconnect; /* reconnect workqueue job */ 742 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 743 unsigned long echo_interval; 744 745 /* 746 * Number of targets available for reconnect. The more targets 747 * the more tasks have to wait to let the demultiplex thread 748 * reconnect. 749 */ 750 int nr_targets; 751 bool noblockcnt; /* use non-blocking connect() */ 752 753 /* 754 * If this is a session channel, 755 * primary_server holds the ref-counted 756 * pointer to primary channel connection for the session. 757 */ 758 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 759 struct TCP_Server_Info *primary_server; 760 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 761 762 #ifdef CONFIG_CIFS_SWN_UPCALL 763 bool use_swn_dstaddr; 764 struct sockaddr_storage swn_dstaddr; 765 #endif 766 struct mutex refpath_lock; /* protects leaf_fullpath */ 767 /* 768 * leaf_fullpath: Canonical DFS referral path related to this 769 * connection. 770 * It is used in DFS cache refresher, reconnect and may 771 * change due to nested DFS links. 772 * 773 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 774 * mostly used for not requiring a copy of @leaf_fullpath when getting 775 * cached or new DFS referrals (which might also sleep during I/O). 776 * While @srv_lock is held for making string and NULL comparions against 777 * both fields as in mount(2) and cache refresh. 778 * 779 * format: \\HOST\SHARE[\OPTIONAL PATH] 780 */ 781 char *leaf_fullpath; 782 }; 783 784 static inline bool is_smb1(struct TCP_Server_Info *server) 785 { 786 return HEADER_PREAMBLE_SIZE(server) != 0; 787 } 788 789 static inline void cifs_server_lock(struct TCP_Server_Info *server) 790 { 791 unsigned int nofs_flag = memalloc_nofs_save(); 792 793 mutex_lock(&server->_srv_mutex); 794 server->nofs_flag = nofs_flag; 795 } 796 797 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 798 { 799 unsigned int nofs_flag = server->nofs_flag; 800 801 mutex_unlock(&server->_srv_mutex); 802 memalloc_nofs_restore(nofs_flag); 803 } 804 805 struct cifs_credits { 806 unsigned int value; 807 unsigned int instance; 808 }; 809 810 static inline unsigned int 811 in_flight(struct TCP_Server_Info *server) 812 { 813 unsigned int num; 814 815 spin_lock(&server->req_lock); 816 num = server->in_flight; 817 spin_unlock(&server->req_lock); 818 return num; 819 } 820 821 static inline bool 822 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 823 { 824 int num; 825 826 spin_lock(&server->req_lock); 827 num = *credits; 828 spin_unlock(&server->req_lock); 829 return num >= num_credits; 830 } 831 832 static inline void 833 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 834 const int optype) 835 { 836 server->ops->add_credits(server, credits, optype); 837 } 838 839 static inline void 840 add_credits_and_wake_if(struct TCP_Server_Info *server, 841 const struct cifs_credits *credits, const int optype) 842 { 843 if (credits->value) { 844 server->ops->add_credits(server, credits, optype); 845 wake_up(&server->request_q); 846 } 847 } 848 849 static inline void 850 set_credits(struct TCP_Server_Info *server, const int val) 851 { 852 server->ops->set_credits(server, val); 853 } 854 855 static inline int 856 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 857 const unsigned int payload_size) 858 { 859 return server->ops->adjust_credits ? 860 server->ops->adjust_credits(server, credits, payload_size) : 0; 861 } 862 863 static inline __le64 864 get_next_mid64(struct TCP_Server_Info *server) 865 { 866 return cpu_to_le64(server->ops->get_next_mid(server)); 867 } 868 869 static inline __le16 870 get_next_mid(struct TCP_Server_Info *server) 871 { 872 __u16 mid = server->ops->get_next_mid(server); 873 /* 874 * The value in the SMB header should be little endian for easy 875 * on-the-wire decoding. 876 */ 877 return cpu_to_le16(mid); 878 } 879 880 static inline void 881 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 882 { 883 if (server->ops->revert_current_mid) 884 server->ops->revert_current_mid(server, val); 885 } 886 887 static inline void 888 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 889 const struct smb2_hdr *shdr) 890 { 891 unsigned int num = le16_to_cpu(shdr->CreditCharge); 892 893 return revert_current_mid(server, num > 0 ? num : 1); 894 } 895 896 static inline __u16 897 get_mid(const struct smb_hdr *smb) 898 { 899 return le16_to_cpu(smb->Mid); 900 } 901 902 static inline bool 903 compare_mid(__u16 mid, const struct smb_hdr *smb) 904 { 905 return mid == le16_to_cpu(smb->Mid); 906 } 907 908 /* 909 * When the server supports very large reads and writes via POSIX extensions, 910 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 911 * including the RFC1001 length. 912 * 913 * Note that this might make for "interesting" allocation problems during 914 * writeback however as we have to allocate an array of pointers for the 915 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 916 * 917 * For reads, there is a similar problem as we need to allocate an array 918 * of kvecs to handle the receive, though that should only need to be done 919 * once. 920 */ 921 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 922 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 923 924 /* 925 * When the server doesn't allow large posix writes, only allow a rsize/wsize 926 * of 2^17-1 minus the size of the call header. That allows for a read or 927 * write up to the maximum size described by RFC1002. 928 */ 929 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 930 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 931 932 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 933 934 /* 935 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 936 * those values when posix extensions aren't in force. In actuality here, we 937 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 938 * to be ok with the extra byte even though Windows doesn't send writes that 939 * are that large. 940 * 941 * Citation: 942 * 943 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 944 */ 945 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 946 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 947 948 /* 949 * Macros to allow the TCP_Server_Info->net field and related code to drop out 950 * when CONFIG_NET_NS isn't set. 951 */ 952 953 #ifdef CONFIG_NET_NS 954 955 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 956 { 957 return srv->net; 958 } 959 960 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 961 { 962 srv->net = net; 963 } 964 965 #else 966 967 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 968 { 969 return &init_net; 970 } 971 972 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 973 { 974 } 975 976 #endif 977 978 struct cifs_server_iface { 979 struct list_head iface_head; 980 struct kref refcount; 981 size_t speed; 982 size_t weight_fulfilled; 983 unsigned int num_channels; 984 unsigned int rdma_capable : 1; 985 unsigned int rss_capable : 1; 986 unsigned int is_active : 1; /* unset if non existent */ 987 struct sockaddr_storage sockaddr; 988 }; 989 990 /* release iface when last ref is dropped */ 991 static inline void 992 release_iface(struct kref *ref) 993 { 994 struct cifs_server_iface *iface = container_of(ref, 995 struct cifs_server_iface, 996 refcount); 997 kfree(iface); 998 } 999 1000 struct cifs_chan { 1001 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1002 struct TCP_Server_Info *server; 1003 struct cifs_server_iface *iface; /* interface in use */ 1004 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1005 }; 1006 1007 /* 1008 * Session structure. One of these for each uid session with a particular host 1009 */ 1010 struct cifs_ses { 1011 struct list_head smb_ses_list; 1012 struct list_head rlist; /* reconnect list */ 1013 struct list_head tcon_list; 1014 struct cifs_tcon *tcon_ipc; 1015 spinlock_t ses_lock; /* protect anything here that is not protected */ 1016 struct mutex session_mutex; 1017 struct TCP_Server_Info *server; /* pointer to server info */ 1018 int ses_count; /* reference counter */ 1019 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1020 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1021 char *serverOS; /* name of operating system underlying server */ 1022 char *serverNOS; /* name of network operating system of server */ 1023 char *serverDomain; /* security realm of server */ 1024 __u64 Suid; /* remote smb uid */ 1025 kuid_t linux_uid; /* overriding owner of files on the mount */ 1026 kuid_t cred_uid; /* owner of credentials */ 1027 unsigned int capabilities; 1028 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1029 char *user_name; /* must not be null except during init of sess 1030 and after mount option parsing we fill it */ 1031 char *domainName; 1032 char *password; 1033 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1034 struct session_key auth_key; 1035 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1036 enum securityEnum sectype; /* what security flavor was specified? */ 1037 bool sign; /* is signing required? */ 1038 bool domainAuto:1; 1039 __u16 session_flags; 1040 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1041 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1042 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1043 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1044 1045 /* 1046 * Network interfaces available on the server this session is 1047 * connected to. 1048 * 1049 * Other channels can be opened by connecting and binding this 1050 * session to interfaces from this list. 1051 * 1052 * iface_lock should be taken when accessing any of these fields 1053 */ 1054 spinlock_t iface_lock; 1055 /* ========= begin: protected by iface_lock ======== */ 1056 struct list_head iface_list; 1057 size_t iface_count; 1058 unsigned long iface_last_update; /* jiffies */ 1059 /* ========= end: protected by iface_lock ======== */ 1060 1061 spinlock_t chan_lock; 1062 /* ========= begin: protected by chan_lock ======== */ 1063 #define CIFS_MAX_CHANNELS 16 1064 #define CIFS_INVAL_CHAN_INDEX (-1) 1065 #define CIFS_ALL_CHANNELS_SET(ses) \ 1066 ((1UL << (ses)->chan_count) - 1) 1067 #define CIFS_ALL_CHANS_GOOD(ses) \ 1068 (!(ses)->chans_need_reconnect) 1069 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1070 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1071 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1072 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1073 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1074 test_bit((index), &(ses)->chans_need_reconnect) 1075 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1076 ((ses)->chans[(index)].in_reconnect) 1077 1078 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1079 size_t chan_count; 1080 size_t chan_max; 1081 atomic_t chan_seq; /* round robin state */ 1082 1083 /* 1084 * chans_need_reconnect is a bitmap indicating which of the channels 1085 * under this smb session needs to be reconnected. 1086 * If not multichannel session, only one bit will be used. 1087 * 1088 * We will ask for sess and tcon reconnection only if all the 1089 * channels are marked for needing reconnection. This will 1090 * enable the sessions on top to continue to live till any 1091 * of the channels below are active. 1092 */ 1093 unsigned long chans_need_reconnect; 1094 /* ========= end: protected by chan_lock ======== */ 1095 struct cifs_ses *dfs_root_ses; 1096 struct nls_table *local_nls; 1097 }; 1098 1099 static inline bool 1100 cap_unix(struct cifs_ses *ses) 1101 { 1102 return ses->server->vals->cap_unix & ses->capabilities; 1103 } 1104 1105 /* 1106 * common struct for holding inode info when searching for or updating an 1107 * inode with new info 1108 */ 1109 1110 #define CIFS_FATTR_JUNCTION 0x1 1111 #define CIFS_FATTR_DELETE_PENDING 0x2 1112 #define CIFS_FATTR_NEED_REVAL 0x4 1113 #define CIFS_FATTR_INO_COLLISION 0x8 1114 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1115 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1116 1117 struct cifs_fattr { 1118 u32 cf_flags; 1119 u32 cf_cifsattrs; 1120 u64 cf_uniqueid; 1121 u64 cf_eof; 1122 u64 cf_bytes; 1123 u64 cf_createtime; 1124 kuid_t cf_uid; 1125 kgid_t cf_gid; 1126 umode_t cf_mode; 1127 dev_t cf_rdev; 1128 unsigned int cf_nlink; 1129 unsigned int cf_dtype; 1130 struct timespec64 cf_atime; 1131 struct timespec64 cf_mtime; 1132 struct timespec64 cf_ctime; 1133 u32 cf_cifstag; 1134 char *cf_symlink_target; 1135 }; 1136 1137 /* 1138 * there is one of these for each connection to a resource on a particular 1139 * session 1140 */ 1141 struct cifs_tcon { 1142 struct list_head tcon_list; 1143 int tc_count; 1144 struct list_head rlist; /* reconnect list */ 1145 spinlock_t tc_lock; /* protect anything here that is not protected */ 1146 atomic_t num_local_opens; /* num of all opens including disconnected */ 1147 atomic_t num_remote_opens; /* num of all network opens on server */ 1148 struct list_head openFileList; 1149 spinlock_t open_file_lock; /* protects list above */ 1150 struct cifs_ses *ses; /* pointer to session associated with */ 1151 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1152 char *nativeFileSystem; 1153 char *password; /* for share-level security */ 1154 __u32 tid; /* The 4 byte tree id */ 1155 __u16 Flags; /* optional support bits */ 1156 enum tid_status_enum status; 1157 atomic_t num_smbs_sent; 1158 union { 1159 struct { 1160 atomic_t num_writes; 1161 atomic_t num_reads; 1162 atomic_t num_flushes; 1163 atomic_t num_oplock_brks; 1164 atomic_t num_opens; 1165 atomic_t num_closes; 1166 atomic_t num_deletes; 1167 atomic_t num_mkdirs; 1168 atomic_t num_posixopens; 1169 atomic_t num_posixmkdirs; 1170 atomic_t num_rmdirs; 1171 atomic_t num_renames; 1172 atomic_t num_t2renames; 1173 atomic_t num_ffirst; 1174 atomic_t num_fnext; 1175 atomic_t num_fclose; 1176 atomic_t num_hardlinks; 1177 atomic_t num_symlinks; 1178 atomic_t num_locks; 1179 atomic_t num_acl_get; 1180 atomic_t num_acl_set; 1181 } cifs_stats; 1182 struct { 1183 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1184 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1185 } smb2_stats; 1186 } stats; 1187 __u64 bytes_read; 1188 __u64 bytes_written; 1189 spinlock_t stat_lock; /* protects the two fields above */ 1190 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1191 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1192 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1193 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1194 bool pipe:1; /* set if connection to pipe share */ 1195 bool print:1; /* set if connection to printer share */ 1196 bool retry:1; 1197 bool nocase:1; 1198 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1199 bool nodelete:1; 1200 bool seal:1; /* transport encryption for this mounted share */ 1201 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1202 for this mount even if server would support */ 1203 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1204 bool local_lease:1; /* check leases (only) on local system not remote */ 1205 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1206 bool broken_sparse_sup; /* if server or share does not support sparse */ 1207 bool need_reconnect:1; /* connection reset, tid now invalid */ 1208 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1209 bool use_resilient:1; /* use resilient instead of durable handles */ 1210 bool use_persistent:1; /* use persistent instead of durable handles */ 1211 bool no_lease:1; /* Do not request leases on files or directories */ 1212 bool use_witness:1; /* use witness protocol */ 1213 __le32 capabilities; 1214 __u32 share_flags; 1215 __u32 maximal_access; 1216 __u32 vol_serial_number; 1217 __le64 vol_create_time; 1218 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1219 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1220 __u32 ss_flags; /* sector size flags */ 1221 __u32 perf_sector_size; /* best sector size for perf */ 1222 __u32 max_chunks; 1223 __u32 max_bytes_chunk; 1224 __u32 max_bytes_copy; 1225 __u32 max_cached_dirs; 1226 #ifdef CONFIG_CIFS_FSCACHE 1227 u64 resource_id; /* server resource id */ 1228 struct fscache_volume *fscache; /* cookie for share */ 1229 #endif 1230 struct list_head pending_opens; /* list of incomplete opens */ 1231 struct cached_fids *cfids; 1232 /* BB add field for back pointer to sb struct(s)? */ 1233 #ifdef CONFIG_CIFS_DFS_UPCALL 1234 struct list_head dfs_ses_list; 1235 struct delayed_work dfs_cache_work; 1236 #endif 1237 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1238 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1239 }; 1240 1241 /* 1242 * This is a refcounted and timestamped container for a tcon pointer. The 1243 * container holds a tcon reference. It is considered safe to free one of 1244 * these when the tl_count goes to 0. The tl_time is the time of the last 1245 * "get" on the container. 1246 */ 1247 struct tcon_link { 1248 struct rb_node tl_rbnode; 1249 kuid_t tl_uid; 1250 unsigned long tl_flags; 1251 #define TCON_LINK_MASTER 0 1252 #define TCON_LINK_PENDING 1 1253 #define TCON_LINK_IN_TREE 2 1254 unsigned long tl_time; 1255 atomic_t tl_count; 1256 struct cifs_tcon *tl_tcon; 1257 }; 1258 1259 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1260 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1261 1262 static inline struct cifs_tcon * 1263 tlink_tcon(struct tcon_link *tlink) 1264 { 1265 return tlink->tl_tcon; 1266 } 1267 1268 static inline struct tcon_link * 1269 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1270 { 1271 return cifs_sb->master_tlink; 1272 } 1273 1274 extern void cifs_put_tlink(struct tcon_link *tlink); 1275 1276 static inline struct tcon_link * 1277 cifs_get_tlink(struct tcon_link *tlink) 1278 { 1279 if (tlink && !IS_ERR(tlink)) 1280 atomic_inc(&tlink->tl_count); 1281 return tlink; 1282 } 1283 1284 /* This function is always expected to succeed */ 1285 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1286 1287 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1288 1289 struct cifs_pending_open { 1290 struct list_head olist; 1291 struct tcon_link *tlink; 1292 __u8 lease_key[16]; 1293 __u32 oplock; 1294 }; 1295 1296 struct cifs_deferred_close { 1297 struct list_head dlist; 1298 struct tcon_link *tlink; 1299 __u16 netfid; 1300 __u64 persistent_fid; 1301 __u64 volatile_fid; 1302 }; 1303 1304 /* 1305 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1306 * This is used to track byte stream locks on the file 1307 */ 1308 struct cifsLockInfo { 1309 struct list_head llist; /* pointer to next cifsLockInfo */ 1310 struct list_head blist; /* pointer to locks blocked on this */ 1311 wait_queue_head_t block_q; 1312 __u64 offset; 1313 __u64 length; 1314 __u32 pid; 1315 __u16 type; 1316 __u16 flags; 1317 }; 1318 1319 /* 1320 * One of these for each open instance of a file 1321 */ 1322 struct cifs_search_info { 1323 loff_t index_of_last_entry; 1324 __u16 entries_in_buffer; 1325 __u16 info_level; 1326 __u32 resume_key; 1327 char *ntwrk_buf_start; 1328 char *srch_entries_start; 1329 char *last_entry; 1330 const char *presume_name; 1331 unsigned int resume_name_len; 1332 bool endOfSearch:1; 1333 bool emptyDir:1; 1334 bool unicode:1; 1335 bool smallBuf:1; /* so we know which buf_release function to call */ 1336 }; 1337 1338 #define ACL_NO_MODE ((umode_t)(-1)) 1339 struct cifs_open_parms { 1340 struct cifs_tcon *tcon; 1341 struct cifs_sb_info *cifs_sb; 1342 int disposition; 1343 int desired_access; 1344 int create_options; 1345 const char *path; 1346 struct cifs_fid *fid; 1347 umode_t mode; 1348 bool reconnect:1; 1349 }; 1350 1351 struct cifs_fid { 1352 __u16 netfid; 1353 __u64 persistent_fid; /* persist file id for smb2 */ 1354 __u64 volatile_fid; /* volatile file id for smb2 */ 1355 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1356 __u8 create_guid[16]; 1357 __u32 access; 1358 struct cifs_pending_open *pending_open; 1359 unsigned int epoch; 1360 #ifdef CONFIG_CIFS_DEBUG2 1361 __u64 mid; 1362 #endif /* CIFS_DEBUG2 */ 1363 bool purge_cache; 1364 }; 1365 1366 struct cifs_fid_locks { 1367 struct list_head llist; 1368 struct cifsFileInfo *cfile; /* fid that owns locks */ 1369 struct list_head locks; /* locks held by fid above */ 1370 }; 1371 1372 struct cifsFileInfo { 1373 /* following two lists are protected by tcon->open_file_lock */ 1374 struct list_head tlist; /* pointer to next fid owned by tcon */ 1375 struct list_head flist; /* next fid (file instance) for this inode */ 1376 /* lock list below protected by cifsi->lock_sem */ 1377 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1378 kuid_t uid; /* allows finding which FileInfo structure */ 1379 __u32 pid; /* process id who opened file */ 1380 struct cifs_fid fid; /* file id from remote */ 1381 struct list_head rlist; /* reconnect list */ 1382 /* BB add lock scope info here if needed */ 1383 /* lock scope id (0 if none) */ 1384 struct dentry *dentry; 1385 struct tcon_link *tlink; 1386 unsigned int f_flags; 1387 bool invalidHandle:1; /* file closed via session abend */ 1388 bool swapfile:1; 1389 bool oplock_break_cancelled:1; 1390 unsigned int oplock_epoch; /* epoch from the lease break */ 1391 __u32 oplock_level; /* oplock/lease level from the lease break */ 1392 int count; 1393 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1394 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1395 struct cifs_search_info srch_inf; 1396 struct work_struct oplock_break; /* work for oplock breaks */ 1397 struct work_struct put; /* work for the final part of _put */ 1398 struct delayed_work deferred; 1399 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1400 char *symlink_target; 1401 }; 1402 1403 struct cifs_io_parms { 1404 __u16 netfid; 1405 __u64 persistent_fid; /* persist file id for smb2 */ 1406 __u64 volatile_fid; /* volatile file id for smb2 */ 1407 __u32 pid; 1408 __u64 offset; 1409 unsigned int length; 1410 struct cifs_tcon *tcon; 1411 struct TCP_Server_Info *server; 1412 }; 1413 1414 struct cifs_aio_ctx { 1415 struct kref refcount; 1416 struct list_head list; 1417 struct mutex aio_mutex; 1418 struct completion done; 1419 struct iov_iter iter; 1420 struct kiocb *iocb; 1421 struct cifsFileInfo *cfile; 1422 struct bio_vec *bv; 1423 loff_t pos; 1424 unsigned int nr_pinned_pages; 1425 ssize_t rc; 1426 unsigned int len; 1427 unsigned int total_len; 1428 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1429 bool should_dirty; 1430 /* 1431 * Indicates if this aio_ctx is for direct_io, 1432 * If yes, iter is a copy of the user passed iov_iter 1433 */ 1434 bool direct_io; 1435 }; 1436 1437 /* asynchronous read support */ 1438 struct cifs_readdata { 1439 struct kref refcount; 1440 struct list_head list; 1441 struct completion done; 1442 struct cifsFileInfo *cfile; 1443 struct address_space *mapping; 1444 struct cifs_aio_ctx *ctx; 1445 __u64 offset; 1446 ssize_t got_bytes; 1447 unsigned int bytes; 1448 pid_t pid; 1449 int result; 1450 struct work_struct work; 1451 struct iov_iter iter; 1452 struct kvec iov[2]; 1453 struct TCP_Server_Info *server; 1454 #ifdef CONFIG_CIFS_SMB_DIRECT 1455 struct smbd_mr *mr; 1456 #endif 1457 struct cifs_credits credits; 1458 }; 1459 1460 /* asynchronous write support */ 1461 struct cifs_writedata { 1462 struct kref refcount; 1463 struct list_head list; 1464 struct completion done; 1465 enum writeback_sync_modes sync_mode; 1466 struct work_struct work; 1467 struct cifsFileInfo *cfile; 1468 struct cifs_aio_ctx *ctx; 1469 struct iov_iter iter; 1470 struct bio_vec *bv; 1471 __u64 offset; 1472 pid_t pid; 1473 unsigned int bytes; 1474 int result; 1475 struct TCP_Server_Info *server; 1476 #ifdef CONFIG_CIFS_SMB_DIRECT 1477 struct smbd_mr *mr; 1478 #endif 1479 struct cifs_credits credits; 1480 }; 1481 1482 /* 1483 * Take a reference on the file private data. Must be called with 1484 * cfile->file_info_lock held. 1485 */ 1486 static inline void 1487 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1488 { 1489 ++cifs_file->count; 1490 } 1491 1492 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1493 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1494 bool offload); 1495 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1496 1497 #define CIFS_CACHE_READ_FLG 1 1498 #define CIFS_CACHE_HANDLE_FLG 2 1499 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1500 #define CIFS_CACHE_WRITE_FLG 4 1501 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1502 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1503 1504 #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)) 1505 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1506 #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)) 1507 1508 /* 1509 * One of these for each file inode 1510 */ 1511 1512 struct cifsInodeInfo { 1513 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1514 bool can_cache_brlcks; 1515 struct list_head llist; /* locks helb by this inode */ 1516 /* 1517 * NOTE: Some code paths call down_read(lock_sem) twice, so 1518 * we must always use cifs_down_write() instead of down_write() 1519 * for this semaphore to avoid deadlocks. 1520 */ 1521 struct rw_semaphore lock_sem; /* protect the fields above */ 1522 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1523 struct list_head openFileList; 1524 spinlock_t open_file_lock; /* protects openFileList */ 1525 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1526 unsigned int oplock; /* oplock/lease level we have */ 1527 unsigned int epoch; /* used to track lease state changes */ 1528 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1529 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1530 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1531 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1532 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1533 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1534 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1535 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1536 unsigned long flags; 1537 spinlock_t writers_lock; 1538 unsigned int writers; /* Number of writers on this inode */ 1539 unsigned long time; /* jiffies of last update of inode */ 1540 u64 server_eof; /* current file size on server -- protected by i_lock */ 1541 u64 uniqueid; /* server inode number */ 1542 u64 createtime; /* creation time on server */ 1543 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1544 struct list_head deferred_closes; /* list of deferred closes */ 1545 spinlock_t deferred_lock; /* protection on deferred list */ 1546 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1547 char *symlink_target; 1548 }; 1549 1550 static inline struct cifsInodeInfo * 1551 CIFS_I(struct inode *inode) 1552 { 1553 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1554 } 1555 1556 static inline struct cifs_sb_info * 1557 CIFS_SB(struct super_block *sb) 1558 { 1559 return sb->s_fs_info; 1560 } 1561 1562 static inline struct cifs_sb_info * 1563 CIFS_FILE_SB(struct file *file) 1564 { 1565 return CIFS_SB(file_inode(file)->i_sb); 1566 } 1567 1568 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1569 { 1570 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1571 return '/'; 1572 else 1573 return '\\'; 1574 } 1575 1576 static inline void 1577 convert_delimiter(char *path, char delim) 1578 { 1579 char old_delim, *pos; 1580 1581 if (delim == '/') 1582 old_delim = '\\'; 1583 else 1584 old_delim = '/'; 1585 1586 pos = path; 1587 while ((pos = strchr(pos, old_delim))) 1588 *pos = delim; 1589 } 1590 1591 #define cifs_stats_inc atomic_inc 1592 1593 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1594 unsigned int bytes) 1595 { 1596 if (bytes) { 1597 spin_lock(&tcon->stat_lock); 1598 tcon->bytes_written += bytes; 1599 spin_unlock(&tcon->stat_lock); 1600 } 1601 } 1602 1603 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1604 unsigned int bytes) 1605 { 1606 spin_lock(&tcon->stat_lock); 1607 tcon->bytes_read += bytes; 1608 spin_unlock(&tcon->stat_lock); 1609 } 1610 1611 1612 /* 1613 * This is the prototype for the mid receive function. This function is for 1614 * receiving the rest of the SMB frame, starting with the WordCount (which is 1615 * just after the MID in struct smb_hdr). Note: 1616 * 1617 * - This will be called by cifsd, with no locks held. 1618 * - The mid will still be on the pending_mid_q. 1619 * - mid->resp_buf will point to the current buffer. 1620 * 1621 * Returns zero on a successful receive, or an error. The receive state in 1622 * the TCP_Server_Info will also be updated. 1623 */ 1624 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1625 struct mid_q_entry *mid); 1626 1627 /* 1628 * This is the prototype for the mid callback function. This is called once the 1629 * mid has been received off of the socket. When creating one, take special 1630 * care to avoid deadlocks. Things to bear in mind: 1631 * 1632 * - it will be called by cifsd, with no locks held 1633 * - the mid will be removed from any lists 1634 */ 1635 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1636 1637 /* 1638 * This is the protopyte for mid handle function. This is called once the mid 1639 * has been recognized after decryption of the message. 1640 */ 1641 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1642 struct mid_q_entry *mid); 1643 1644 /* one of these for every pending CIFS request to the server */ 1645 struct mid_q_entry { 1646 struct list_head qhead; /* mids waiting on reply from this server */ 1647 struct kref refcount; 1648 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1649 __u64 mid; /* multiplex id */ 1650 __u16 credits; /* number of credits consumed by this mid */ 1651 __u16 credits_received; /* number of credits from the response */ 1652 __u32 pid; /* process id */ 1653 __u32 sequence_number; /* for CIFS signing */ 1654 unsigned long when_alloc; /* when mid was created */ 1655 #ifdef CONFIG_CIFS_STATS2 1656 unsigned long when_sent; /* time when smb send finished */ 1657 unsigned long when_received; /* when demux complete (taken off wire) */ 1658 #endif 1659 mid_receive_t *receive; /* call receive callback */ 1660 mid_callback_t *callback; /* call completion callback */ 1661 mid_handle_t *handle; /* call handle mid callback */ 1662 void *callback_data; /* general purpose pointer for callback */ 1663 struct task_struct *creator; 1664 void *resp_buf; /* pointer to received SMB header */ 1665 unsigned int resp_buf_size; 1666 int mid_state; /* wish this were enum but can not pass to wait_event */ 1667 unsigned int mid_flags; 1668 __le16 command; /* smb command code */ 1669 unsigned int optype; /* operation type */ 1670 bool large_buf:1; /* if valid response, is pointer to large buf */ 1671 bool multiRsp:1; /* multiple trans2 responses for one request */ 1672 bool multiEnd:1; /* both received */ 1673 bool decrypted:1; /* decrypted entry */ 1674 }; 1675 1676 struct close_cancelled_open { 1677 struct cifs_fid fid; 1678 struct cifs_tcon *tcon; 1679 struct work_struct work; 1680 __u64 mid; 1681 __u16 cmd; 1682 }; 1683 1684 /* Make code in transport.c a little cleaner by moving 1685 update of optional stats into function below */ 1686 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1687 { 1688 atomic_inc(&server->in_send); 1689 } 1690 1691 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1692 { 1693 atomic_dec(&server->in_send); 1694 } 1695 1696 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1697 { 1698 atomic_inc(&server->num_waiters); 1699 } 1700 1701 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1702 { 1703 atomic_dec(&server->num_waiters); 1704 } 1705 1706 #ifdef CONFIG_CIFS_STATS2 1707 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1708 { 1709 mid->when_sent = jiffies; 1710 } 1711 #else 1712 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1713 { 1714 } 1715 #endif 1716 1717 /* for pending dnotify requests */ 1718 struct dir_notify_req { 1719 struct list_head lhead; 1720 __le16 Pid; 1721 __le16 PidHigh; 1722 __u16 Mid; 1723 __u16 Tid; 1724 __u16 Uid; 1725 __u16 netfid; 1726 __u32 filter; /* CompletionFilter (for multishot) */ 1727 int multishot; 1728 struct file *pfile; 1729 }; 1730 1731 struct dfs_info3_param { 1732 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1733 int path_consumed; 1734 int server_type; 1735 int ref_flag; 1736 char *path_name; 1737 char *node_name; 1738 int ttl; 1739 }; 1740 1741 struct file_list { 1742 struct list_head list; 1743 struct cifsFileInfo *cfile; 1744 }; 1745 1746 struct cifs_mount_ctx { 1747 struct cifs_sb_info *cifs_sb; 1748 struct smb3_fs_context *fs_ctx; 1749 unsigned int xid; 1750 struct TCP_Server_Info *server; 1751 struct cifs_ses *ses; 1752 struct cifs_tcon *tcon; 1753 struct list_head dfs_ses_list; 1754 }; 1755 1756 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1757 { 1758 kfree(param->path_name); 1759 kfree(param->node_name); 1760 } 1761 1762 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1763 { 1764 if (param) 1765 __free_dfs_info_param(param); 1766 } 1767 1768 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1769 { 1770 if (param) { 1771 __free_dfs_info_param(param); 1772 memset(param, 0, sizeof(*param)); 1773 } 1774 } 1775 1776 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1777 int number_of_items) 1778 { 1779 int i; 1780 1781 if ((number_of_items == 0) || (param == NULL)) 1782 return; 1783 for (i = 0; i < number_of_items; i++) { 1784 kfree(param[i].path_name); 1785 kfree(param[i].node_name); 1786 } 1787 kfree(param); 1788 } 1789 1790 static inline bool is_interrupt_error(int error) 1791 { 1792 switch (error) { 1793 case -EINTR: 1794 case -ERESTARTSYS: 1795 case -ERESTARTNOHAND: 1796 case -ERESTARTNOINTR: 1797 return true; 1798 } 1799 return false; 1800 } 1801 1802 static inline bool is_retryable_error(int error) 1803 { 1804 if (is_interrupt_error(error) || error == -EAGAIN) 1805 return true; 1806 return false; 1807 } 1808 1809 1810 /* cifs_get_writable_file() flags */ 1811 #define FIND_WR_ANY 0 1812 #define FIND_WR_FSUID_ONLY 1 1813 #define FIND_WR_WITH_DELETE 2 1814 1815 #define MID_FREE 0 1816 #define MID_REQUEST_ALLOCATED 1 1817 #define MID_REQUEST_SUBMITTED 2 1818 #define MID_RESPONSE_RECEIVED 4 1819 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1820 #define MID_RESPONSE_MALFORMED 0x10 1821 #define MID_SHUTDOWN 0x20 1822 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1823 1824 /* Flags */ 1825 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1826 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1827 1828 /* Types of response buffer returned from SendReceive2 */ 1829 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1830 #define CIFS_SMALL_BUFFER 1 1831 #define CIFS_LARGE_BUFFER 2 1832 #define CIFS_IOVEC 4 /* array of response buffers */ 1833 1834 /* Type of Request to SendReceive2 */ 1835 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1836 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1837 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1838 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1839 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1840 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1841 1842 /* Type of request operation */ 1843 #define CIFS_ECHO_OP 0x080 /* echo request */ 1844 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1845 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1846 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1847 /* Lower bitmask values are reserved by others below. */ 1848 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1849 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1850 1851 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1852 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1853 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1854 1855 /* Security Flags: indicate type of session setup needed */ 1856 #define CIFSSEC_MAY_SIGN 0x00001 1857 #define CIFSSEC_MAY_NTLMV2 0x00004 1858 #define CIFSSEC_MAY_KRB5 0x00008 1859 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1860 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1861 1862 #define CIFSSEC_MUST_SIGN 0x01001 1863 /* note that only one of the following can be set so the 1864 result of setting MUST flags more than once will be to 1865 require use of the stronger protocol */ 1866 #define CIFSSEC_MUST_NTLMV2 0x04004 1867 #define CIFSSEC_MUST_KRB5 0x08008 1868 #ifdef CONFIG_CIFS_UPCALL 1869 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1870 #else 1871 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1872 #endif /* UPCALL */ 1873 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1874 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1875 1876 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1877 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1878 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1879 /* 1880 ***************************************************************** 1881 * All constants go here 1882 ***************************************************************** 1883 */ 1884 1885 #define UID_HASH (16) 1886 1887 /* 1888 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1889 * following to be declared. 1890 */ 1891 1892 /**************************************************************************** 1893 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1894 * to the locking order. i.e. if two locks are to be held together, the lock that 1895 * appears higher in this list needs to be taken before the other. 1896 * 1897 * If you hold a lock that is lower in this list, and you need to take a higher lock 1898 * (or if you think that one of the functions that you're calling may need to), first 1899 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1900 * ensure that locks are picked up only in one direction in the below table 1901 * (top to bottom). 1902 * 1903 * Also, if you expect a function to be called with a lock held, explicitly document 1904 * this in the comments on top of your function definition. 1905 * 1906 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1907 * possible. Blocking / calling other functions with a lock held always increase 1908 * the risk of a possible deadlock. 1909 * 1910 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1911 * debug. Also, any new lock that you introduce, please add to this list in the correct 1912 * order. 1913 * 1914 * Please populate this list whenever you introduce new locks in your changes. Or in 1915 * case I've missed some existing locks. Please ensure that it's added in the list 1916 * based on the locking order expected. 1917 * 1918 * ===================================================================================== 1919 * Lock Protects Initialization fn 1920 * ===================================================================================== 1921 * vol_list_lock 1922 * vol_info->ctx_lock vol_info->ctx 1923 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1924 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1925 * reconnect_mutex 1926 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1927 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1928 * cifs_tcon 1929 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1930 * cifs_tcon->pending_opens 1931 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1932 * cifs_tcon->bytes_written 1933 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1934 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1935 * GlobalCurrentXid 1936 * GlobalTotalActiveXid 1937 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1938 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1939 * ->CurrentMid 1940 * (any changes in mid_q_entry fields) 1941 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1942 * ->credits 1943 * ->echo_credits 1944 * ->oplock_credits 1945 * ->reconnect_instance 1946 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1947 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1948 * ->iface_count 1949 * ->iface_last_update 1950 * cifs_ses->chan_lock cifs_ses->chans 1951 * ->chans_need_reconnect 1952 * ->chans_in_reconnect 1953 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1954 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1955 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1956 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1957 * ->can_cache_brlcks 1958 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1959 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1960 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1961 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1962 * ->invalidHandle initiate_cifs_search 1963 * ->oplock_break_cancelled 1964 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 1965 ****************************************************************************/ 1966 1967 #ifdef DECLARE_GLOBALS_HERE 1968 #define GLOBAL_EXTERN 1969 #else 1970 #define GLOBAL_EXTERN extern 1971 #endif 1972 1973 /* 1974 * the list of TCP_Server_Info structures, ie each of the sockets 1975 * connecting our client to a distinct server (ip address), is 1976 * chained together by cifs_tcp_ses_list. The list of all our SMB 1977 * sessions (and from that the tree connections) can be found 1978 * by iterating over cifs_tcp_ses_list 1979 */ 1980 extern struct list_head cifs_tcp_ses_list; 1981 1982 /* 1983 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1984 * tcp session, and the list of tcon's per smb session. It also protects 1985 * the reference counters for the server, smb session, and tcon. 1986 * generally the locks should be taken in order tcp_ses_lock before 1987 * tcon->open_file_lock and that before file->file_info_lock since the 1988 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 1989 */ 1990 extern spinlock_t cifs_tcp_ses_lock; 1991 1992 /* 1993 * Global transaction id (XID) information 1994 */ 1995 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 1996 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 1997 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 1998 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 1999 2000 /* 2001 * Global counters, updated atomically 2002 */ 2003 extern atomic_t sesInfoAllocCount; 2004 extern atomic_t tconInfoAllocCount; 2005 extern atomic_t tcpSesNextId; 2006 extern atomic_t tcpSesAllocCount; 2007 extern atomic_t tcpSesReconnectCount; 2008 extern atomic_t tconInfoReconnectCount; 2009 2010 /* Various Debug counters */ 2011 extern atomic_t buf_alloc_count; /* current number allocated */ 2012 extern atomic_t small_buf_alloc_count; 2013 #ifdef CONFIG_CIFS_STATS2 2014 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2015 extern atomic_t total_small_buf_alloc_count; 2016 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2017 #endif 2018 2019 /* Misc globals */ 2020 extern bool enable_oplocks; /* enable or disable oplocks */ 2021 extern bool lookupCacheEnabled; 2022 extern unsigned int global_secflags; /* if on, session setup sent 2023 with more secure ntlmssp2 challenge/resp */ 2024 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2025 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2026 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2027 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2028 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2029 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2030 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2031 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2032 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2033 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2034 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2035 extern atomic_t mid_count; 2036 2037 void cifs_oplock_break(struct work_struct *work); 2038 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2039 void smb2_deferred_work_close(struct work_struct *work); 2040 2041 extern const struct slow_work_ops cifs_oplock_break_ops; 2042 extern struct workqueue_struct *cifsiod_wq; 2043 extern struct workqueue_struct *decrypt_wq; 2044 extern struct workqueue_struct *fileinfo_put_wq; 2045 extern struct workqueue_struct *cifsoplockd_wq; 2046 extern struct workqueue_struct *deferredclose_wq; 2047 extern __u32 cifs_lock_secret; 2048 2049 extern mempool_t *cifs_mid_poolp; 2050 2051 /* Operations for different SMB versions */ 2052 #define SMB1_VERSION_STRING "1.0" 2053 #define SMB20_VERSION_STRING "2.0" 2054 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2055 extern struct smb_version_operations smb1_operations; 2056 extern struct smb_version_values smb1_values; 2057 extern struct smb_version_operations smb20_operations; 2058 extern struct smb_version_values smb20_values; 2059 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2060 #define SMB21_VERSION_STRING "2.1" 2061 extern struct smb_version_operations smb21_operations; 2062 extern struct smb_version_values smb21_values; 2063 #define SMBDEFAULT_VERSION_STRING "default" 2064 extern struct smb_version_values smbdefault_values; 2065 #define SMB3ANY_VERSION_STRING "3" 2066 extern struct smb_version_values smb3any_values; 2067 #define SMB30_VERSION_STRING "3.0" 2068 extern struct smb_version_operations smb30_operations; 2069 extern struct smb_version_values smb30_values; 2070 #define SMB302_VERSION_STRING "3.02" 2071 #define ALT_SMB302_VERSION_STRING "3.0.2" 2072 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2073 extern struct smb_version_values smb302_values; 2074 #define SMB311_VERSION_STRING "3.1.1" 2075 #define ALT_SMB311_VERSION_STRING "3.11" 2076 extern struct smb_version_operations smb311_operations; 2077 extern struct smb_version_values smb311_values; 2078 2079 static inline char *get_security_type_str(enum securityEnum sectype) 2080 { 2081 switch (sectype) { 2082 case RawNTLMSSP: 2083 return "RawNTLMSSP"; 2084 case Kerberos: 2085 return "Kerberos"; 2086 case NTLMv2: 2087 return "NTLMv2"; 2088 default: 2089 return "Unknown"; 2090 } 2091 } 2092 2093 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2094 { 2095 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2096 } 2097 2098 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2099 { 2100 /* 2101 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2102 * Subsystem Notifies That a Share Is a DFS Share. 2103 * 2104 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2105 * Application Updates a Share. 2106 */ 2107 if (!tcon || !tcon->ses || !tcon->ses->server) 2108 return false; 2109 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2110 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2111 } 2112 2113 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2114 const struct dfs_info3_param *ref) 2115 { 2116 /* 2117 * Check if all targets are capable of handling DFS referrals as per 2118 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2119 */ 2120 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2121 } 2122 2123 static inline u64 cifs_flock_len(const struct file_lock *fl) 2124 { 2125 return (u64)fl->fl_end - fl->fl_start + 1; 2126 } 2127 2128 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2129 { 2130 if (WARN_ON_ONCE(!ses || !ses->server)) 2131 return 0; 2132 /* 2133 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2134 * servers do require it during NTLMSSP. 2135 */ 2136 if (ses->server->dialect <= SMB20_PROT_ID) 2137 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2138 return sizeof(ses->workstation_name); 2139 } 2140 2141 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2142 { 2143 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2144 dst->AccessFlags = src->AccessFlags; 2145 dst->CurrentByteOffset = src->CurrentByteOffset; 2146 dst->Mode = src->Mode; 2147 dst->AlignmentRequirement = src->AlignmentRequirement; 2148 dst->FileNameLength = src->FileNameLength; 2149 } 2150 2151 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2152 int num_rqst, 2153 const u8 *sig) 2154 { 2155 unsigned int len, skip; 2156 unsigned int nents = 0; 2157 unsigned long addr; 2158 size_t data_size; 2159 int i, j; 2160 2161 /* 2162 * The first rqst has a transform header where the first 20 bytes are 2163 * not part of the encrypted blob. 2164 */ 2165 skip = 20; 2166 2167 /* Assumes the first rqst has a transform header as the first iov. 2168 * I.e. 2169 * rqst[0].rq_iov[0] is transform header 2170 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2171 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2172 */ 2173 for (i = 0; i < num_rqst; i++) { 2174 data_size = iov_iter_count(&rqst[i].rq_iter); 2175 2176 /* We really don't want a mixture of pinned and unpinned pages 2177 * in the sglist. It's hard to keep track of which is what. 2178 * Instead, we convert to a BVEC-type iterator higher up. 2179 */ 2180 if (data_size && 2181 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2182 return -EIO; 2183 2184 /* We also don't want to have any extra refs or pins to clean 2185 * up in the sglist. 2186 */ 2187 if (data_size && 2188 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2189 return -EIO; 2190 2191 for (j = 0; j < rqst[i].rq_nvec; j++) { 2192 struct kvec *iov = &rqst[i].rq_iov[j]; 2193 2194 addr = (unsigned long)iov->iov_base + skip; 2195 if (unlikely(is_vmalloc_addr((void *)addr))) { 2196 len = iov->iov_len - skip; 2197 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2198 PAGE_SIZE); 2199 } else { 2200 nents++; 2201 } 2202 skip = 0; 2203 } 2204 if (data_size) 2205 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2206 } 2207 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2208 return nents; 2209 } 2210 2211 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2212 * stack object as buf. 2213 */ 2214 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2215 const void *buf, 2216 unsigned int buflen) 2217 { 2218 unsigned long addr = (unsigned long)buf; 2219 unsigned int off = offset_in_page(addr); 2220 2221 addr &= PAGE_MASK; 2222 if (unlikely(is_vmalloc_addr((void *)addr))) { 2223 do { 2224 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2225 2226 sg_set_page(&sgtable->sgl[sgtable->nents++], 2227 vmalloc_to_page((void *)addr), len, off); 2228 2229 off = 0; 2230 addr += PAGE_SIZE; 2231 buflen -= len; 2232 } while (buflen); 2233 } else { 2234 sg_set_page(&sgtable->sgl[sgtable->nents++], 2235 virt_to_page((void *)addr), buflen, off); 2236 } 2237 } 2238 2239 struct smb2_compound_vars { 2240 struct cifs_open_parms oparms; 2241 struct kvec rsp_iov[3]; 2242 struct smb_rqst rqst[3]; 2243 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2244 struct kvec qi_iov; 2245 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2246 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2247 struct kvec close_iov; 2248 struct smb2_file_rename_info rename_info; 2249 struct smb2_file_link_info link_info; 2250 }; 2251 2252 #endif /* _CIFS_GLOB_H */ 2253