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 list_del_init(&iface->iface_head); 998 kfree(iface); 999 } 1000 1001 struct cifs_chan { 1002 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1003 struct TCP_Server_Info *server; 1004 struct cifs_server_iface *iface; /* interface in use */ 1005 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1006 }; 1007 1008 /* 1009 * Session structure. One of these for each uid session with a particular host 1010 */ 1011 struct cifs_ses { 1012 struct list_head smb_ses_list; 1013 struct list_head rlist; /* reconnect list */ 1014 struct list_head tcon_list; 1015 struct cifs_tcon *tcon_ipc; 1016 spinlock_t ses_lock; /* protect anything here that is not protected */ 1017 struct mutex session_mutex; 1018 struct TCP_Server_Info *server; /* pointer to server info */ 1019 int ses_count; /* reference counter */ 1020 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1021 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1022 char *serverOS; /* name of operating system underlying server */ 1023 char *serverNOS; /* name of network operating system of server */ 1024 char *serverDomain; /* security realm of server */ 1025 __u64 Suid; /* remote smb uid */ 1026 kuid_t linux_uid; /* overriding owner of files on the mount */ 1027 kuid_t cred_uid; /* owner of credentials */ 1028 unsigned int capabilities; 1029 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1030 char *user_name; /* must not be null except during init of sess 1031 and after mount option parsing we fill it */ 1032 char *domainName; 1033 char *password; 1034 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1035 struct session_key auth_key; 1036 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1037 enum securityEnum sectype; /* what security flavor was specified? */ 1038 bool sign; /* is signing required? */ 1039 bool domainAuto:1; 1040 __u16 session_flags; 1041 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1042 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1043 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1044 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1045 1046 /* 1047 * Network interfaces available on the server this session is 1048 * connected to. 1049 * 1050 * Other channels can be opened by connecting and binding this 1051 * session to interfaces from this list. 1052 * 1053 * iface_lock should be taken when accessing any of these fields 1054 */ 1055 spinlock_t iface_lock; 1056 /* ========= begin: protected by iface_lock ======== */ 1057 struct list_head iface_list; 1058 size_t iface_count; 1059 unsigned long iface_last_update; /* jiffies */ 1060 /* ========= end: protected by iface_lock ======== */ 1061 1062 spinlock_t chan_lock; 1063 /* ========= begin: protected by chan_lock ======== */ 1064 #define CIFS_MAX_CHANNELS 16 1065 #define CIFS_INVAL_CHAN_INDEX (-1) 1066 #define CIFS_ALL_CHANNELS_SET(ses) \ 1067 ((1UL << (ses)->chan_count) - 1) 1068 #define CIFS_ALL_CHANS_GOOD(ses) \ 1069 (!(ses)->chans_need_reconnect) 1070 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1071 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1072 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1073 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1074 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1075 test_bit((index), &(ses)->chans_need_reconnect) 1076 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1077 ((ses)->chans[(index)].in_reconnect) 1078 1079 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1080 size_t chan_count; 1081 size_t chan_max; 1082 atomic_t chan_seq; /* round robin state */ 1083 1084 /* 1085 * chans_need_reconnect is a bitmap indicating which of the channels 1086 * under this smb session needs to be reconnected. 1087 * If not multichannel session, only one bit will be used. 1088 * 1089 * We will ask for sess and tcon reconnection only if all the 1090 * channels are marked for needing reconnection. This will 1091 * enable the sessions on top to continue to live till any 1092 * of the channels below are active. 1093 */ 1094 unsigned long chans_need_reconnect; 1095 /* ========= end: protected by chan_lock ======== */ 1096 struct cifs_ses *dfs_root_ses; 1097 struct nls_table *local_nls; 1098 }; 1099 1100 static inline bool 1101 cap_unix(struct cifs_ses *ses) 1102 { 1103 return ses->server->vals->cap_unix & ses->capabilities; 1104 } 1105 1106 /* 1107 * common struct for holding inode info when searching for or updating an 1108 * inode with new info 1109 */ 1110 1111 #define CIFS_FATTR_JUNCTION 0x1 1112 #define CIFS_FATTR_DELETE_PENDING 0x2 1113 #define CIFS_FATTR_NEED_REVAL 0x4 1114 #define CIFS_FATTR_INO_COLLISION 0x8 1115 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1116 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1117 1118 struct cifs_fattr { 1119 u32 cf_flags; 1120 u32 cf_cifsattrs; 1121 u64 cf_uniqueid; 1122 u64 cf_eof; 1123 u64 cf_bytes; 1124 u64 cf_createtime; 1125 kuid_t cf_uid; 1126 kgid_t cf_gid; 1127 umode_t cf_mode; 1128 dev_t cf_rdev; 1129 unsigned int cf_nlink; 1130 unsigned int cf_dtype; 1131 struct timespec64 cf_atime; 1132 struct timespec64 cf_mtime; 1133 struct timespec64 cf_ctime; 1134 u32 cf_cifstag; 1135 char *cf_symlink_target; 1136 }; 1137 1138 /* 1139 * there is one of these for each connection to a resource on a particular 1140 * session 1141 */ 1142 struct cifs_tcon { 1143 struct list_head tcon_list; 1144 int tc_count; 1145 struct list_head rlist; /* reconnect list */ 1146 spinlock_t tc_lock; /* protect anything here that is not protected */ 1147 atomic_t num_local_opens; /* num of all opens including disconnected */ 1148 atomic_t num_remote_opens; /* num of all network opens on server */ 1149 struct list_head openFileList; 1150 spinlock_t open_file_lock; /* protects list above */ 1151 struct cifs_ses *ses; /* pointer to session associated with */ 1152 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1153 char *nativeFileSystem; 1154 char *password; /* for share-level security */ 1155 __u32 tid; /* The 4 byte tree id */ 1156 __u16 Flags; /* optional support bits */ 1157 enum tid_status_enum status; 1158 atomic_t num_smbs_sent; 1159 union { 1160 struct { 1161 atomic_t num_writes; 1162 atomic_t num_reads; 1163 atomic_t num_flushes; 1164 atomic_t num_oplock_brks; 1165 atomic_t num_opens; 1166 atomic_t num_closes; 1167 atomic_t num_deletes; 1168 atomic_t num_mkdirs; 1169 atomic_t num_posixopens; 1170 atomic_t num_posixmkdirs; 1171 atomic_t num_rmdirs; 1172 atomic_t num_renames; 1173 atomic_t num_t2renames; 1174 atomic_t num_ffirst; 1175 atomic_t num_fnext; 1176 atomic_t num_fclose; 1177 atomic_t num_hardlinks; 1178 atomic_t num_symlinks; 1179 atomic_t num_locks; 1180 atomic_t num_acl_get; 1181 atomic_t num_acl_set; 1182 } cifs_stats; 1183 struct { 1184 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1185 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1186 } smb2_stats; 1187 } stats; 1188 __u64 bytes_read; 1189 __u64 bytes_written; 1190 spinlock_t stat_lock; /* protects the two fields above */ 1191 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1192 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1193 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1194 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1195 bool pipe:1; /* set if connection to pipe share */ 1196 bool print:1; /* set if connection to printer share */ 1197 bool retry:1; 1198 bool nocase:1; 1199 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1200 bool nodelete:1; 1201 bool seal:1; /* transport encryption for this mounted share */ 1202 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1203 for this mount even if server would support */ 1204 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1205 bool local_lease:1; /* check leases (only) on local system not remote */ 1206 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1207 bool broken_sparse_sup; /* if server or share does not support sparse */ 1208 bool need_reconnect:1; /* connection reset, tid now invalid */ 1209 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1210 bool use_resilient:1; /* use resilient instead of durable handles */ 1211 bool use_persistent:1; /* use persistent instead of durable handles */ 1212 bool no_lease:1; /* Do not request leases on files or directories */ 1213 bool use_witness:1; /* use witness protocol */ 1214 __le32 capabilities; 1215 __u32 share_flags; 1216 __u32 maximal_access; 1217 __u32 vol_serial_number; 1218 __le64 vol_create_time; 1219 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1220 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1221 __u32 ss_flags; /* sector size flags */ 1222 __u32 perf_sector_size; /* best sector size for perf */ 1223 __u32 max_chunks; 1224 __u32 max_bytes_chunk; 1225 __u32 max_bytes_copy; 1226 __u32 max_cached_dirs; 1227 #ifdef CONFIG_CIFS_FSCACHE 1228 u64 resource_id; /* server resource id */ 1229 struct fscache_volume *fscache; /* cookie for share */ 1230 #endif 1231 struct list_head pending_opens; /* list of incomplete opens */ 1232 struct cached_fids *cfids; 1233 /* BB add field for back pointer to sb struct(s)? */ 1234 #ifdef CONFIG_CIFS_DFS_UPCALL 1235 struct list_head dfs_ses_list; 1236 struct delayed_work dfs_cache_work; 1237 #endif 1238 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1239 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1240 }; 1241 1242 /* 1243 * This is a refcounted and timestamped container for a tcon pointer. The 1244 * container holds a tcon reference. It is considered safe to free one of 1245 * these when the tl_count goes to 0. The tl_time is the time of the last 1246 * "get" on the container. 1247 */ 1248 struct tcon_link { 1249 struct rb_node tl_rbnode; 1250 kuid_t tl_uid; 1251 unsigned long tl_flags; 1252 #define TCON_LINK_MASTER 0 1253 #define TCON_LINK_PENDING 1 1254 #define TCON_LINK_IN_TREE 2 1255 unsigned long tl_time; 1256 atomic_t tl_count; 1257 struct cifs_tcon *tl_tcon; 1258 }; 1259 1260 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1261 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1262 1263 static inline struct cifs_tcon * 1264 tlink_tcon(struct tcon_link *tlink) 1265 { 1266 return tlink->tl_tcon; 1267 } 1268 1269 static inline struct tcon_link * 1270 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1271 { 1272 return cifs_sb->master_tlink; 1273 } 1274 1275 extern void cifs_put_tlink(struct tcon_link *tlink); 1276 1277 static inline struct tcon_link * 1278 cifs_get_tlink(struct tcon_link *tlink) 1279 { 1280 if (tlink && !IS_ERR(tlink)) 1281 atomic_inc(&tlink->tl_count); 1282 return tlink; 1283 } 1284 1285 /* This function is always expected to succeed */ 1286 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1287 1288 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1289 1290 struct cifs_pending_open { 1291 struct list_head olist; 1292 struct tcon_link *tlink; 1293 __u8 lease_key[16]; 1294 __u32 oplock; 1295 }; 1296 1297 struct cifs_deferred_close { 1298 struct list_head dlist; 1299 struct tcon_link *tlink; 1300 __u16 netfid; 1301 __u64 persistent_fid; 1302 __u64 volatile_fid; 1303 }; 1304 1305 /* 1306 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1307 * This is used to track byte stream locks on the file 1308 */ 1309 struct cifsLockInfo { 1310 struct list_head llist; /* pointer to next cifsLockInfo */ 1311 struct list_head blist; /* pointer to locks blocked on this */ 1312 wait_queue_head_t block_q; 1313 __u64 offset; 1314 __u64 length; 1315 __u32 pid; 1316 __u16 type; 1317 __u16 flags; 1318 }; 1319 1320 /* 1321 * One of these for each open instance of a file 1322 */ 1323 struct cifs_search_info { 1324 loff_t index_of_last_entry; 1325 __u16 entries_in_buffer; 1326 __u16 info_level; 1327 __u32 resume_key; 1328 char *ntwrk_buf_start; 1329 char *srch_entries_start; 1330 char *last_entry; 1331 const char *presume_name; 1332 unsigned int resume_name_len; 1333 bool endOfSearch:1; 1334 bool emptyDir:1; 1335 bool unicode:1; 1336 bool smallBuf:1; /* so we know which buf_release function to call */ 1337 }; 1338 1339 #define ACL_NO_MODE ((umode_t)(-1)) 1340 struct cifs_open_parms { 1341 struct cifs_tcon *tcon; 1342 struct cifs_sb_info *cifs_sb; 1343 int disposition; 1344 int desired_access; 1345 int create_options; 1346 const char *path; 1347 struct cifs_fid *fid; 1348 umode_t mode; 1349 bool reconnect:1; 1350 }; 1351 1352 struct cifs_fid { 1353 __u16 netfid; 1354 __u64 persistent_fid; /* persist file id for smb2 */ 1355 __u64 volatile_fid; /* volatile file id for smb2 */ 1356 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1357 __u8 create_guid[16]; 1358 __u32 access; 1359 struct cifs_pending_open *pending_open; 1360 unsigned int epoch; 1361 #ifdef CONFIG_CIFS_DEBUG2 1362 __u64 mid; 1363 #endif /* CIFS_DEBUG2 */ 1364 bool purge_cache; 1365 }; 1366 1367 struct cifs_fid_locks { 1368 struct list_head llist; 1369 struct cifsFileInfo *cfile; /* fid that owns locks */ 1370 struct list_head locks; /* locks held by fid above */ 1371 }; 1372 1373 struct cifsFileInfo { 1374 /* following two lists are protected by tcon->open_file_lock */ 1375 struct list_head tlist; /* pointer to next fid owned by tcon */ 1376 struct list_head flist; /* next fid (file instance) for this inode */ 1377 /* lock list below protected by cifsi->lock_sem */ 1378 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1379 kuid_t uid; /* allows finding which FileInfo structure */ 1380 __u32 pid; /* process id who opened file */ 1381 struct cifs_fid fid; /* file id from remote */ 1382 struct list_head rlist; /* reconnect list */ 1383 /* BB add lock scope info here if needed */ 1384 /* lock scope id (0 if none) */ 1385 struct dentry *dentry; 1386 struct tcon_link *tlink; 1387 unsigned int f_flags; 1388 bool invalidHandle:1; /* file closed via session abend */ 1389 bool swapfile:1; 1390 bool oplock_break_cancelled:1; 1391 unsigned int oplock_epoch; /* epoch from the lease break */ 1392 __u32 oplock_level; /* oplock/lease level from the lease break */ 1393 int count; 1394 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1395 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1396 struct cifs_search_info srch_inf; 1397 struct work_struct oplock_break; /* work for oplock breaks */ 1398 struct work_struct put; /* work for the final part of _put */ 1399 struct delayed_work deferred; 1400 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1401 char *symlink_target; 1402 }; 1403 1404 struct cifs_io_parms { 1405 __u16 netfid; 1406 __u64 persistent_fid; /* persist file id for smb2 */ 1407 __u64 volatile_fid; /* volatile file id for smb2 */ 1408 __u32 pid; 1409 __u64 offset; 1410 unsigned int length; 1411 struct cifs_tcon *tcon; 1412 struct TCP_Server_Info *server; 1413 }; 1414 1415 struct cifs_aio_ctx { 1416 struct kref refcount; 1417 struct list_head list; 1418 struct mutex aio_mutex; 1419 struct completion done; 1420 struct iov_iter iter; 1421 struct kiocb *iocb; 1422 struct cifsFileInfo *cfile; 1423 struct bio_vec *bv; 1424 loff_t pos; 1425 unsigned int nr_pinned_pages; 1426 ssize_t rc; 1427 unsigned int len; 1428 unsigned int total_len; 1429 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1430 bool should_dirty; 1431 /* 1432 * Indicates if this aio_ctx is for direct_io, 1433 * If yes, iter is a copy of the user passed iov_iter 1434 */ 1435 bool direct_io; 1436 }; 1437 1438 /* asynchronous read support */ 1439 struct cifs_readdata { 1440 struct kref refcount; 1441 struct list_head list; 1442 struct completion done; 1443 struct cifsFileInfo *cfile; 1444 struct address_space *mapping; 1445 struct cifs_aio_ctx *ctx; 1446 __u64 offset; 1447 ssize_t got_bytes; 1448 unsigned int bytes; 1449 pid_t pid; 1450 int result; 1451 struct work_struct work; 1452 struct iov_iter iter; 1453 struct kvec iov[2]; 1454 struct TCP_Server_Info *server; 1455 #ifdef CONFIG_CIFS_SMB_DIRECT 1456 struct smbd_mr *mr; 1457 #endif 1458 struct cifs_credits credits; 1459 }; 1460 1461 /* asynchronous write support */ 1462 struct cifs_writedata { 1463 struct kref refcount; 1464 struct list_head list; 1465 struct completion done; 1466 enum writeback_sync_modes sync_mode; 1467 struct work_struct work; 1468 struct cifsFileInfo *cfile; 1469 struct cifs_aio_ctx *ctx; 1470 struct iov_iter iter; 1471 struct bio_vec *bv; 1472 __u64 offset; 1473 pid_t pid; 1474 unsigned int bytes; 1475 int result; 1476 struct TCP_Server_Info *server; 1477 #ifdef CONFIG_CIFS_SMB_DIRECT 1478 struct smbd_mr *mr; 1479 #endif 1480 struct cifs_credits credits; 1481 }; 1482 1483 /* 1484 * Take a reference on the file private data. Must be called with 1485 * cfile->file_info_lock held. 1486 */ 1487 static inline void 1488 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1489 { 1490 ++cifs_file->count; 1491 } 1492 1493 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1494 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1495 bool offload); 1496 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1497 1498 #define CIFS_CACHE_READ_FLG 1 1499 #define CIFS_CACHE_HANDLE_FLG 2 1500 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1501 #define CIFS_CACHE_WRITE_FLG 4 1502 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1503 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1504 1505 #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)) 1506 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1507 #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)) 1508 1509 /* 1510 * One of these for each file inode 1511 */ 1512 1513 struct cifsInodeInfo { 1514 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1515 bool can_cache_brlcks; 1516 struct list_head llist; /* locks helb by this inode */ 1517 /* 1518 * NOTE: Some code paths call down_read(lock_sem) twice, so 1519 * we must always use cifs_down_write() instead of down_write() 1520 * for this semaphore to avoid deadlocks. 1521 */ 1522 struct rw_semaphore lock_sem; /* protect the fields above */ 1523 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1524 struct list_head openFileList; 1525 spinlock_t open_file_lock; /* protects openFileList */ 1526 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1527 unsigned int oplock; /* oplock/lease level we have */ 1528 unsigned int epoch; /* used to track lease state changes */ 1529 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1530 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1531 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1532 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1533 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1534 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1535 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1536 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1537 unsigned long flags; 1538 spinlock_t writers_lock; 1539 unsigned int writers; /* Number of writers on this inode */ 1540 unsigned long time; /* jiffies of last update of inode */ 1541 u64 server_eof; /* current file size on server -- protected by i_lock */ 1542 u64 uniqueid; /* server inode number */ 1543 u64 createtime; /* creation time on server */ 1544 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1545 struct list_head deferred_closes; /* list of deferred closes */ 1546 spinlock_t deferred_lock; /* protection on deferred list */ 1547 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1548 char *symlink_target; 1549 }; 1550 1551 static inline struct cifsInodeInfo * 1552 CIFS_I(struct inode *inode) 1553 { 1554 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1555 } 1556 1557 static inline struct cifs_sb_info * 1558 CIFS_SB(struct super_block *sb) 1559 { 1560 return sb->s_fs_info; 1561 } 1562 1563 static inline struct cifs_sb_info * 1564 CIFS_FILE_SB(struct file *file) 1565 { 1566 return CIFS_SB(file_inode(file)->i_sb); 1567 } 1568 1569 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1570 { 1571 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1572 return '/'; 1573 else 1574 return '\\'; 1575 } 1576 1577 static inline void 1578 convert_delimiter(char *path, char delim) 1579 { 1580 char old_delim, *pos; 1581 1582 if (delim == '/') 1583 old_delim = '\\'; 1584 else 1585 old_delim = '/'; 1586 1587 pos = path; 1588 while ((pos = strchr(pos, old_delim))) 1589 *pos = delim; 1590 } 1591 1592 #define cifs_stats_inc atomic_inc 1593 1594 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1595 unsigned int bytes) 1596 { 1597 if (bytes) { 1598 spin_lock(&tcon->stat_lock); 1599 tcon->bytes_written += bytes; 1600 spin_unlock(&tcon->stat_lock); 1601 } 1602 } 1603 1604 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1605 unsigned int bytes) 1606 { 1607 spin_lock(&tcon->stat_lock); 1608 tcon->bytes_read += bytes; 1609 spin_unlock(&tcon->stat_lock); 1610 } 1611 1612 1613 /* 1614 * This is the prototype for the mid receive function. This function is for 1615 * receiving the rest of the SMB frame, starting with the WordCount (which is 1616 * just after the MID in struct smb_hdr). Note: 1617 * 1618 * - This will be called by cifsd, with no locks held. 1619 * - The mid will still be on the pending_mid_q. 1620 * - mid->resp_buf will point to the current buffer. 1621 * 1622 * Returns zero on a successful receive, or an error. The receive state in 1623 * the TCP_Server_Info will also be updated. 1624 */ 1625 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1626 struct mid_q_entry *mid); 1627 1628 /* 1629 * This is the prototype for the mid callback function. This is called once the 1630 * mid has been received off of the socket. When creating one, take special 1631 * care to avoid deadlocks. Things to bear in mind: 1632 * 1633 * - it will be called by cifsd, with no locks held 1634 * - the mid will be removed from any lists 1635 */ 1636 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1637 1638 /* 1639 * This is the protopyte for mid handle function. This is called once the mid 1640 * has been recognized after decryption of the message. 1641 */ 1642 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1643 struct mid_q_entry *mid); 1644 1645 /* one of these for every pending CIFS request to the server */ 1646 struct mid_q_entry { 1647 struct list_head qhead; /* mids waiting on reply from this server */ 1648 struct kref refcount; 1649 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1650 __u64 mid; /* multiplex id */ 1651 __u16 credits; /* number of credits consumed by this mid */ 1652 __u16 credits_received; /* number of credits from the response */ 1653 __u32 pid; /* process id */ 1654 __u32 sequence_number; /* for CIFS signing */ 1655 unsigned long when_alloc; /* when mid was created */ 1656 #ifdef CONFIG_CIFS_STATS2 1657 unsigned long when_sent; /* time when smb send finished */ 1658 unsigned long when_received; /* when demux complete (taken off wire) */ 1659 #endif 1660 mid_receive_t *receive; /* call receive callback */ 1661 mid_callback_t *callback; /* call completion callback */ 1662 mid_handle_t *handle; /* call handle mid callback */ 1663 void *callback_data; /* general purpose pointer for callback */ 1664 struct task_struct *creator; 1665 void *resp_buf; /* pointer to received SMB header */ 1666 unsigned int resp_buf_size; 1667 int mid_state; /* wish this were enum but can not pass to wait_event */ 1668 unsigned int mid_flags; 1669 __le16 command; /* smb command code */ 1670 unsigned int optype; /* operation type */ 1671 bool large_buf:1; /* if valid response, is pointer to large buf */ 1672 bool multiRsp:1; /* multiple trans2 responses for one request */ 1673 bool multiEnd:1; /* both received */ 1674 bool decrypted:1; /* decrypted entry */ 1675 }; 1676 1677 struct close_cancelled_open { 1678 struct cifs_fid fid; 1679 struct cifs_tcon *tcon; 1680 struct work_struct work; 1681 __u64 mid; 1682 __u16 cmd; 1683 }; 1684 1685 /* Make code in transport.c a little cleaner by moving 1686 update of optional stats into function below */ 1687 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1688 { 1689 atomic_inc(&server->in_send); 1690 } 1691 1692 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1693 { 1694 atomic_dec(&server->in_send); 1695 } 1696 1697 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1698 { 1699 atomic_inc(&server->num_waiters); 1700 } 1701 1702 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1703 { 1704 atomic_dec(&server->num_waiters); 1705 } 1706 1707 #ifdef CONFIG_CIFS_STATS2 1708 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1709 { 1710 mid->when_sent = jiffies; 1711 } 1712 #else 1713 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1714 { 1715 } 1716 #endif 1717 1718 /* for pending dnotify requests */ 1719 struct dir_notify_req { 1720 struct list_head lhead; 1721 __le16 Pid; 1722 __le16 PidHigh; 1723 __u16 Mid; 1724 __u16 Tid; 1725 __u16 Uid; 1726 __u16 netfid; 1727 __u32 filter; /* CompletionFilter (for multishot) */ 1728 int multishot; 1729 struct file *pfile; 1730 }; 1731 1732 struct dfs_info3_param { 1733 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1734 int path_consumed; 1735 int server_type; 1736 int ref_flag; 1737 char *path_name; 1738 char *node_name; 1739 int ttl; 1740 }; 1741 1742 struct file_list { 1743 struct list_head list; 1744 struct cifsFileInfo *cfile; 1745 }; 1746 1747 struct cifs_mount_ctx { 1748 struct cifs_sb_info *cifs_sb; 1749 struct smb3_fs_context *fs_ctx; 1750 unsigned int xid; 1751 struct TCP_Server_Info *server; 1752 struct cifs_ses *ses; 1753 struct cifs_tcon *tcon; 1754 struct list_head dfs_ses_list; 1755 }; 1756 1757 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1758 { 1759 kfree(param->path_name); 1760 kfree(param->node_name); 1761 } 1762 1763 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1764 { 1765 if (param) 1766 __free_dfs_info_param(param); 1767 } 1768 1769 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1770 { 1771 if (param) { 1772 __free_dfs_info_param(param); 1773 memset(param, 0, sizeof(*param)); 1774 } 1775 } 1776 1777 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1778 int number_of_items) 1779 { 1780 int i; 1781 1782 if ((number_of_items == 0) || (param == NULL)) 1783 return; 1784 for (i = 0; i < number_of_items; i++) { 1785 kfree(param[i].path_name); 1786 kfree(param[i].node_name); 1787 } 1788 kfree(param); 1789 } 1790 1791 static inline bool is_interrupt_error(int error) 1792 { 1793 switch (error) { 1794 case -EINTR: 1795 case -ERESTARTSYS: 1796 case -ERESTARTNOHAND: 1797 case -ERESTARTNOINTR: 1798 return true; 1799 } 1800 return false; 1801 } 1802 1803 static inline bool is_retryable_error(int error) 1804 { 1805 if (is_interrupt_error(error) || error == -EAGAIN) 1806 return true; 1807 return false; 1808 } 1809 1810 1811 /* cifs_get_writable_file() flags */ 1812 #define FIND_WR_ANY 0 1813 #define FIND_WR_FSUID_ONLY 1 1814 #define FIND_WR_WITH_DELETE 2 1815 1816 #define MID_FREE 0 1817 #define MID_REQUEST_ALLOCATED 1 1818 #define MID_REQUEST_SUBMITTED 2 1819 #define MID_RESPONSE_RECEIVED 4 1820 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1821 #define MID_RESPONSE_MALFORMED 0x10 1822 #define MID_SHUTDOWN 0x20 1823 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1824 1825 /* Flags */ 1826 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1827 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1828 1829 /* Types of response buffer returned from SendReceive2 */ 1830 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1831 #define CIFS_SMALL_BUFFER 1 1832 #define CIFS_LARGE_BUFFER 2 1833 #define CIFS_IOVEC 4 /* array of response buffers */ 1834 1835 /* Type of Request to SendReceive2 */ 1836 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1837 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1838 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1839 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1840 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1841 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1842 1843 /* Type of request operation */ 1844 #define CIFS_ECHO_OP 0x080 /* echo request */ 1845 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1846 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1847 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1848 /* Lower bitmask values are reserved by others below. */ 1849 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1850 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1851 1852 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1853 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1854 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1855 1856 /* Security Flags: indicate type of session setup needed */ 1857 #define CIFSSEC_MAY_SIGN 0x00001 1858 #define CIFSSEC_MAY_NTLMV2 0x00004 1859 #define CIFSSEC_MAY_KRB5 0x00008 1860 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1861 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1862 1863 #define CIFSSEC_MUST_SIGN 0x01001 1864 /* note that only one of the following can be set so the 1865 result of setting MUST flags more than once will be to 1866 require use of the stronger protocol */ 1867 #define CIFSSEC_MUST_NTLMV2 0x04004 1868 #define CIFSSEC_MUST_KRB5 0x08008 1869 #ifdef CONFIG_CIFS_UPCALL 1870 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1871 #else 1872 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1873 #endif /* UPCALL */ 1874 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1875 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1876 1877 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1878 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1879 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1880 /* 1881 ***************************************************************** 1882 * All constants go here 1883 ***************************************************************** 1884 */ 1885 1886 #define UID_HASH (16) 1887 1888 /* 1889 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1890 * following to be declared. 1891 */ 1892 1893 /**************************************************************************** 1894 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1895 * to the locking order. i.e. if two locks are to be held together, the lock that 1896 * appears higher in this list needs to be taken before the other. 1897 * 1898 * If you hold a lock that is lower in this list, and you need to take a higher lock 1899 * (or if you think that one of the functions that you're calling may need to), first 1900 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1901 * ensure that locks are picked up only in one direction in the below table 1902 * (top to bottom). 1903 * 1904 * Also, if you expect a function to be called with a lock held, explicitly document 1905 * this in the comments on top of your function definition. 1906 * 1907 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1908 * possible. Blocking / calling other functions with a lock held always increase 1909 * the risk of a possible deadlock. 1910 * 1911 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1912 * debug. Also, any new lock that you introduce, please add to this list in the correct 1913 * order. 1914 * 1915 * Please populate this list whenever you introduce new locks in your changes. Or in 1916 * case I've missed some existing locks. Please ensure that it's added in the list 1917 * based on the locking order expected. 1918 * 1919 * ===================================================================================== 1920 * Lock Protects Initialization fn 1921 * ===================================================================================== 1922 * vol_list_lock 1923 * vol_info->ctx_lock vol_info->ctx 1924 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1925 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1926 * reconnect_mutex 1927 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1928 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1929 * cifs_tcon 1930 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1931 * cifs_tcon->pending_opens 1932 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1933 * cifs_tcon->bytes_written 1934 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1935 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1936 * GlobalCurrentXid 1937 * GlobalTotalActiveXid 1938 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1939 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1940 * ->CurrentMid 1941 * (any changes in mid_q_entry fields) 1942 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1943 * ->credits 1944 * ->echo_credits 1945 * ->oplock_credits 1946 * ->reconnect_instance 1947 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1948 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1949 * ->iface_count 1950 * ->iface_last_update 1951 * cifs_ses->chan_lock cifs_ses->chans 1952 * ->chans_need_reconnect 1953 * ->chans_in_reconnect 1954 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1955 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1956 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1957 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1958 * ->can_cache_brlcks 1959 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1960 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1961 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1962 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1963 * ->invalidHandle initiate_cifs_search 1964 * ->oplock_break_cancelled 1965 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 1966 ****************************************************************************/ 1967 1968 #ifdef DECLARE_GLOBALS_HERE 1969 #define GLOBAL_EXTERN 1970 #else 1971 #define GLOBAL_EXTERN extern 1972 #endif 1973 1974 /* 1975 * the list of TCP_Server_Info structures, ie each of the sockets 1976 * connecting our client to a distinct server (ip address), is 1977 * chained together by cifs_tcp_ses_list. The list of all our SMB 1978 * sessions (and from that the tree connections) can be found 1979 * by iterating over cifs_tcp_ses_list 1980 */ 1981 extern struct list_head cifs_tcp_ses_list; 1982 1983 /* 1984 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1985 * tcp session, and the list of tcon's per smb session. It also protects 1986 * the reference counters for the server, smb session, and tcon. 1987 * generally the locks should be taken in order tcp_ses_lock before 1988 * tcon->open_file_lock and that before file->file_info_lock since the 1989 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 1990 */ 1991 extern spinlock_t cifs_tcp_ses_lock; 1992 1993 /* 1994 * Global transaction id (XID) information 1995 */ 1996 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 1997 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 1998 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 1999 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2000 2001 /* 2002 * Global counters, updated atomically 2003 */ 2004 extern atomic_t sesInfoAllocCount; 2005 extern atomic_t tconInfoAllocCount; 2006 extern atomic_t tcpSesNextId; 2007 extern atomic_t tcpSesAllocCount; 2008 extern atomic_t tcpSesReconnectCount; 2009 extern atomic_t tconInfoReconnectCount; 2010 2011 /* Various Debug counters */ 2012 extern atomic_t buf_alloc_count; /* current number allocated */ 2013 extern atomic_t small_buf_alloc_count; 2014 #ifdef CONFIG_CIFS_STATS2 2015 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2016 extern atomic_t total_small_buf_alloc_count; 2017 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2018 #endif 2019 2020 /* Misc globals */ 2021 extern bool enable_oplocks; /* enable or disable oplocks */ 2022 extern bool lookupCacheEnabled; 2023 extern unsigned int global_secflags; /* if on, session setup sent 2024 with more secure ntlmssp2 challenge/resp */ 2025 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2026 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2027 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2028 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2029 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2030 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2031 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2032 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2033 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2034 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2035 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2036 extern atomic_t mid_count; 2037 2038 void cifs_oplock_break(struct work_struct *work); 2039 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2040 void smb2_deferred_work_close(struct work_struct *work); 2041 2042 extern const struct slow_work_ops cifs_oplock_break_ops; 2043 extern struct workqueue_struct *cifsiod_wq; 2044 extern struct workqueue_struct *decrypt_wq; 2045 extern struct workqueue_struct *fileinfo_put_wq; 2046 extern struct workqueue_struct *cifsoplockd_wq; 2047 extern struct workqueue_struct *deferredclose_wq; 2048 extern __u32 cifs_lock_secret; 2049 2050 extern mempool_t *cifs_mid_poolp; 2051 2052 /* Operations for different SMB versions */ 2053 #define SMB1_VERSION_STRING "1.0" 2054 #define SMB20_VERSION_STRING "2.0" 2055 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2056 extern struct smb_version_operations smb1_operations; 2057 extern struct smb_version_values smb1_values; 2058 extern struct smb_version_operations smb20_operations; 2059 extern struct smb_version_values smb20_values; 2060 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2061 #define SMB21_VERSION_STRING "2.1" 2062 extern struct smb_version_operations smb21_operations; 2063 extern struct smb_version_values smb21_values; 2064 #define SMBDEFAULT_VERSION_STRING "default" 2065 extern struct smb_version_values smbdefault_values; 2066 #define SMB3ANY_VERSION_STRING "3" 2067 extern struct smb_version_values smb3any_values; 2068 #define SMB30_VERSION_STRING "3.0" 2069 extern struct smb_version_operations smb30_operations; 2070 extern struct smb_version_values smb30_values; 2071 #define SMB302_VERSION_STRING "3.02" 2072 #define ALT_SMB302_VERSION_STRING "3.0.2" 2073 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2074 extern struct smb_version_values smb302_values; 2075 #define SMB311_VERSION_STRING "3.1.1" 2076 #define ALT_SMB311_VERSION_STRING "3.11" 2077 extern struct smb_version_operations smb311_operations; 2078 extern struct smb_version_values smb311_values; 2079 2080 static inline char *get_security_type_str(enum securityEnum sectype) 2081 { 2082 switch (sectype) { 2083 case RawNTLMSSP: 2084 return "RawNTLMSSP"; 2085 case Kerberos: 2086 return "Kerberos"; 2087 case NTLMv2: 2088 return "NTLMv2"; 2089 default: 2090 return "Unknown"; 2091 } 2092 } 2093 2094 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2095 { 2096 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2097 } 2098 2099 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2100 { 2101 /* 2102 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2103 * Subsystem Notifies That a Share Is a DFS Share. 2104 * 2105 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2106 * Application Updates a Share. 2107 */ 2108 if (!tcon || !tcon->ses || !tcon->ses->server) 2109 return false; 2110 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2111 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2112 } 2113 2114 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2115 const struct dfs_info3_param *ref) 2116 { 2117 /* 2118 * Check if all targets are capable of handling DFS referrals as per 2119 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2120 */ 2121 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2122 } 2123 2124 static inline u64 cifs_flock_len(const struct file_lock *fl) 2125 { 2126 return (u64)fl->fl_end - fl->fl_start + 1; 2127 } 2128 2129 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2130 { 2131 if (WARN_ON_ONCE(!ses || !ses->server)) 2132 return 0; 2133 /* 2134 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2135 * servers do require it during NTLMSSP. 2136 */ 2137 if (ses->server->dialect <= SMB20_PROT_ID) 2138 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2139 return sizeof(ses->workstation_name); 2140 } 2141 2142 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2143 { 2144 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2145 dst->AccessFlags = src->AccessFlags; 2146 dst->CurrentByteOffset = src->CurrentByteOffset; 2147 dst->Mode = src->Mode; 2148 dst->AlignmentRequirement = src->AlignmentRequirement; 2149 dst->FileNameLength = src->FileNameLength; 2150 } 2151 2152 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2153 int num_rqst, 2154 const u8 *sig) 2155 { 2156 unsigned int len, skip; 2157 unsigned int nents = 0; 2158 unsigned long addr; 2159 size_t data_size; 2160 int i, j; 2161 2162 /* 2163 * The first rqst has a transform header where the first 20 bytes are 2164 * not part of the encrypted blob. 2165 */ 2166 skip = 20; 2167 2168 /* Assumes the first rqst has a transform header as the first iov. 2169 * I.e. 2170 * rqst[0].rq_iov[0] is transform header 2171 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2172 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2173 */ 2174 for (i = 0; i < num_rqst; i++) { 2175 data_size = iov_iter_count(&rqst[i].rq_iter); 2176 2177 /* We really don't want a mixture of pinned and unpinned pages 2178 * in the sglist. It's hard to keep track of which is what. 2179 * Instead, we convert to a BVEC-type iterator higher up. 2180 */ 2181 if (data_size && 2182 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2183 return -EIO; 2184 2185 /* We also don't want to have any extra refs or pins to clean 2186 * up in the sglist. 2187 */ 2188 if (data_size && 2189 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2190 return -EIO; 2191 2192 for (j = 0; j < rqst[i].rq_nvec; j++) { 2193 struct kvec *iov = &rqst[i].rq_iov[j]; 2194 2195 addr = (unsigned long)iov->iov_base + skip; 2196 if (unlikely(is_vmalloc_addr((void *)addr))) { 2197 len = iov->iov_len - skip; 2198 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2199 PAGE_SIZE); 2200 } else { 2201 nents++; 2202 } 2203 skip = 0; 2204 } 2205 if (data_size) 2206 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2207 } 2208 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2209 return nents; 2210 } 2211 2212 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2213 * stack object as buf. 2214 */ 2215 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2216 const void *buf, 2217 unsigned int buflen) 2218 { 2219 unsigned long addr = (unsigned long)buf; 2220 unsigned int off = offset_in_page(addr); 2221 2222 addr &= PAGE_MASK; 2223 if (unlikely(is_vmalloc_addr((void *)addr))) { 2224 do { 2225 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2226 2227 sg_set_page(&sgtable->sgl[sgtable->nents++], 2228 vmalloc_to_page((void *)addr), len, off); 2229 2230 off = 0; 2231 addr += PAGE_SIZE; 2232 buflen -= len; 2233 } while (buflen); 2234 } else { 2235 sg_set_page(&sgtable->sgl[sgtable->nents++], 2236 virt_to_page((void *)addr), buflen, off); 2237 } 2238 } 2239 2240 struct smb2_compound_vars { 2241 struct cifs_open_parms oparms; 2242 struct kvec rsp_iov[3]; 2243 struct smb_rqst rqst[3]; 2244 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2245 struct kvec qi_iov; 2246 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2247 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2248 struct kvec close_iov; 2249 struct smb2_file_rename_info rename_info; 2250 struct smb2_file_link_info link_info; 2251 }; 2252 2253 #endif /* _CIFS_GLOB_H */ 2254