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