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 static inline bool cifs_open_data_reparse(struct cifs_open_info_data *data) 209 { 210 struct smb2_file_all_info *fi = &data->fi; 211 u32 attrs = le32_to_cpu(fi->Attributes); 212 bool ret; 213 214 ret = data->reparse_point || (attrs & ATTR_REPARSE); 215 if (ret) 216 attrs |= ATTR_REPARSE; 217 fi->Attributes = cpu_to_le32(attrs); 218 return ret; 219 } 220 221 static inline void cifs_free_open_info(struct cifs_open_info_data *data) 222 { 223 kfree(data->symlink_target); 224 } 225 226 /* 227 ***************************************************************** 228 * Except the CIFS PDUs themselves all the 229 * globally interesting structs should go here 230 ***************************************************************** 231 */ 232 233 /* 234 * A smb_rqst represents a complete request to be issued to a server. It's 235 * formed by a kvec array, followed by an array of pages. Page data is assumed 236 * to start at the beginning of the first page. 237 */ 238 struct smb_rqst { 239 struct kvec *rq_iov; /* array of kvecs */ 240 unsigned int rq_nvec; /* number of kvecs in array */ 241 size_t rq_iter_size; /* Amount of data in ->rq_iter */ 242 struct iov_iter rq_iter; /* Data iterator */ 243 struct xarray rq_buffer; /* Page buffer for encryption */ 244 }; 245 246 struct mid_q_entry; 247 struct TCP_Server_Info; 248 struct cifsFileInfo; 249 struct cifs_ses; 250 struct cifs_tcon; 251 struct dfs_info3_param; 252 struct cifs_fattr; 253 struct smb3_fs_context; 254 struct cifs_fid; 255 struct cifs_readdata; 256 struct cifs_writedata; 257 struct cifs_io_parms; 258 struct cifs_search_info; 259 struct cifsInodeInfo; 260 struct cifs_open_parms; 261 struct cifs_credits; 262 263 struct smb_version_operations { 264 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 265 struct mid_q_entry *); 266 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 267 /* setup request: allocate mid, sign message */ 268 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 269 struct TCP_Server_Info *, 270 struct smb_rqst *); 271 /* setup async request: allocate mid, sign message */ 272 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 273 struct smb_rqst *); 274 /* check response: verify signature, map error */ 275 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 276 bool); 277 void (*add_credits)(struct TCP_Server_Info *server, 278 const struct cifs_credits *credits, 279 const int optype); 280 void (*set_credits)(struct TCP_Server_Info *, const int); 281 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 282 unsigned int (*get_credits)(struct mid_q_entry *); 283 __u64 (*get_next_mid)(struct TCP_Server_Info *); 284 void (*revert_current_mid)(struct TCP_Server_Info *server, 285 const unsigned int val); 286 /* data offset from read response message */ 287 unsigned int (*read_data_offset)(char *); 288 /* 289 * Data length from read response message 290 * When in_remaining is true, the returned data length is in 291 * message field DataRemaining for out-of-band data read (e.g through 292 * Memory Registration RDMA write in SMBD). 293 * Otherwise, the returned data length is in message field DataLength. 294 */ 295 unsigned int (*read_data_length)(char *, bool in_remaining); 296 /* map smb to linux error */ 297 int (*map_error)(char *, bool); 298 /* find mid corresponding to the response message */ 299 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 300 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 301 void (*clear_stats)(struct cifs_tcon *); 302 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 303 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 304 /* verify the message */ 305 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 306 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 307 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 308 void (*downgrade_oplock)(struct TCP_Server_Info *server, 309 struct cifsInodeInfo *cinode, __u32 oplock, 310 unsigned int epoch, bool *purge_cache); 311 /* process transaction2 response */ 312 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 313 char *, int); 314 /* check if we need to negotiate */ 315 bool (*need_neg)(struct TCP_Server_Info *); 316 /* negotiate to the server */ 317 int (*negotiate)(const unsigned int xid, 318 struct cifs_ses *ses, 319 struct TCP_Server_Info *server); 320 /* set negotiated write size */ 321 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 322 /* set negotiated read size */ 323 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 324 /* setup smb sessionn */ 325 int (*sess_setup)(const unsigned int, struct cifs_ses *, 326 struct TCP_Server_Info *server, 327 const struct nls_table *); 328 /* close smb session */ 329 int (*logoff)(const unsigned int, struct cifs_ses *); 330 /* connect to a server share */ 331 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 332 struct cifs_tcon *, const struct nls_table *); 333 /* close tree connecion */ 334 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 335 /* get DFS referrals */ 336 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 337 const char *, struct dfs_info3_param **, 338 unsigned int *, const struct nls_table *, int); 339 /* informational QFS call */ 340 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 341 struct cifs_sb_info *); 342 /* check if a path is accessible or not */ 343 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 344 struct cifs_sb_info *, const char *); 345 /* query path data from the server */ 346 int (*query_path_info)(const unsigned int xid, 347 struct cifs_tcon *tcon, 348 struct cifs_sb_info *cifs_sb, 349 const char *full_path, 350 struct cifs_open_info_data *data); 351 /* query file data from the server */ 352 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 353 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 354 /* query reparse point to determine which type of special file */ 355 int (*query_reparse_point)(const unsigned int xid, 356 struct cifs_tcon *tcon, 357 struct cifs_sb_info *cifs_sb, 358 const char *full_path, 359 u32 *tag, struct kvec *rsp, 360 int *rsp_buftype); 361 /* get server index number */ 362 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 363 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 364 struct cifs_open_info_data *data); 365 /* set size by path */ 366 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 367 const char *, __u64, struct cifs_sb_info *, bool); 368 /* set size by file handle */ 369 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 370 struct cifsFileInfo *, __u64, bool); 371 /* set attributes */ 372 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 373 const unsigned int); 374 int (*set_compression)(const unsigned int, struct cifs_tcon *, 375 struct cifsFileInfo *); 376 /* check if we can send an echo or nor */ 377 bool (*can_echo)(struct TCP_Server_Info *); 378 /* send echo request */ 379 int (*echo)(struct TCP_Server_Info *); 380 /* create directory */ 381 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 382 umode_t mode, struct cifs_tcon *tcon, 383 const char *full_path, 384 struct cifs_sb_info *cifs_sb); 385 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 386 struct cifs_tcon *tcon, const char *name, 387 struct cifs_sb_info *sb); 388 /* set info on created directory */ 389 void (*mkdir_setinfo)(struct inode *, const char *, 390 struct cifs_sb_info *, struct cifs_tcon *, 391 const unsigned int); 392 /* remove directory */ 393 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 394 struct cifs_sb_info *); 395 /* unlink file */ 396 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 397 struct cifs_sb_info *); 398 /* open, rename and delete file */ 399 int (*rename_pending_delete)(const char *, struct dentry *, 400 const unsigned int); 401 /* send rename request */ 402 int (*rename)(const unsigned int xid, 403 struct cifs_tcon *tcon, 404 struct dentry *source_dentry, 405 const char *from_name, const char *to_name, 406 struct cifs_sb_info *cifs_sb); 407 /* send create hardlink request */ 408 int (*create_hardlink)(const unsigned int xid, 409 struct cifs_tcon *tcon, 410 struct dentry *source_dentry, 411 const char *from_name, const char *to_name, 412 struct cifs_sb_info *cifs_sb); 413 /* query symlink target */ 414 int (*query_symlink)(const unsigned int xid, 415 struct cifs_tcon *tcon, 416 struct cifs_sb_info *cifs_sb, 417 const char *full_path, 418 char **target_path); 419 /* open a file for non-posix mounts */ 420 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 421 void *buf); 422 /* set fid protocol-specific info */ 423 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 424 /* close a file */ 425 void (*close)(const unsigned int, struct cifs_tcon *, 426 struct cifs_fid *); 427 /* close a file, returning file attributes and timestamps */ 428 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 429 struct cifsFileInfo *pfile_info); 430 /* send a flush request to the server */ 431 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 432 /* async read from the server */ 433 int (*async_readv)(struct cifs_readdata *); 434 /* async write to the server */ 435 int (*async_writev)(struct cifs_writedata *, 436 void (*release)(struct kref *)); 437 /* sync read from the server */ 438 int (*sync_read)(const unsigned int, struct cifs_fid *, 439 struct cifs_io_parms *, unsigned int *, char **, 440 int *); 441 /* sync write to the server */ 442 int (*sync_write)(const unsigned int, struct cifs_fid *, 443 struct cifs_io_parms *, unsigned int *, struct kvec *, 444 unsigned long); 445 /* open dir, start readdir */ 446 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 447 const char *, struct cifs_sb_info *, 448 struct cifs_fid *, __u16, 449 struct cifs_search_info *); 450 /* continue readdir */ 451 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 452 struct cifs_fid *, 453 __u16, struct cifs_search_info *srch_inf); 454 /* close dir */ 455 int (*close_dir)(const unsigned int, struct cifs_tcon *, 456 struct cifs_fid *); 457 /* calculate a size of SMB message */ 458 unsigned int (*calc_smb_size)(void *buf); 459 /* check for STATUS_PENDING and process the response if yes */ 460 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 461 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 462 bool (*is_session_expired)(char *); 463 /* send oplock break response */ 464 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 465 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 466 /* query remote filesystem */ 467 int (*queryfs)(const unsigned int, struct cifs_tcon *, 468 struct cifs_sb_info *, struct kstatfs *); 469 /* send mandatory brlock to the server */ 470 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 471 __u64, __u32, int, int, bool); 472 /* unlock range of mandatory locks */ 473 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 474 const unsigned int); 475 /* push brlocks from the cache to the server */ 476 int (*push_mand_locks)(struct cifsFileInfo *); 477 /* get lease key of the inode */ 478 void (*get_lease_key)(struct inode *, struct cifs_fid *); 479 /* set lease key of the inode */ 480 void (*set_lease_key)(struct inode *, struct cifs_fid *); 481 /* generate new lease key */ 482 void (*new_lease_key)(struct cifs_fid *); 483 int (*generate_signingkey)(struct cifs_ses *ses, 484 struct TCP_Server_Info *server); 485 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 486 bool allocate_crypto); 487 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 488 struct cifsFileInfo *src_file); 489 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 490 struct cifsFileInfo *src_file, void __user *); 491 int (*notify)(const unsigned int xid, struct file *pfile, 492 void __user *pbuf, bool return_changes); 493 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 494 struct cifs_sb_info *, const unsigned char *, 495 char *, unsigned int *); 496 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 497 struct cifs_sb_info *, const unsigned char *, 498 char *, unsigned int *); 499 /* if we can do cache read operations */ 500 bool (*is_read_op)(__u32); 501 /* set oplock level for the inode */ 502 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 503 bool *); 504 /* create lease context buffer for CREATE request */ 505 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 506 /* parse lease context buffer and return oplock/epoch info */ 507 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 508 ssize_t (*copychunk_range)(const unsigned int, 509 struct cifsFileInfo *src_file, 510 struct cifsFileInfo *target_file, 511 u64 src_off, u64 len, u64 dest_off); 512 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 513 struct cifsFileInfo *target_file, u64 src_off, u64 len, 514 u64 dest_off); 515 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 516 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 517 const unsigned char *, const unsigned char *, char *, 518 size_t, struct cifs_sb_info *); 519 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 520 const char *, const void *, const __u16, 521 const struct nls_table *, struct cifs_sb_info *); 522 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, 523 const char *, u32 *, u32); 524 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, 525 const struct cifs_fid *, u32 *, u32); 526 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, 527 int); 528 /* writepages retry size */ 529 unsigned int (*wp_retry_size)(struct inode *); 530 /* get mtu credits */ 531 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, 532 unsigned int *, struct cifs_credits *); 533 /* adjust previously taken mtu credits to request size */ 534 int (*adjust_credits)(struct TCP_Server_Info *server, 535 struct cifs_credits *credits, 536 const unsigned int payload_size); 537 /* check if we need to issue closedir */ 538 bool (*dir_needs_close)(struct cifsFileInfo *); 539 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 540 loff_t); 541 /* init transform request - used for encryption for now */ 542 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 543 struct smb_rqst *, struct smb_rqst *); 544 int (*is_transform_hdr)(void *buf); 545 int (*receive_transform)(struct TCP_Server_Info *, 546 struct mid_q_entry **, char **, int *); 547 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 548 enum securityEnum); 549 int (*next_header)(struct TCP_Server_Info *server, char *buf, 550 unsigned int *noff); 551 /* ioctl passthrough for query_info */ 552 int (*ioctl_query_info)(const unsigned int xid, 553 struct cifs_tcon *tcon, 554 struct cifs_sb_info *cifs_sb, 555 __le16 *path, int is_dir, 556 unsigned long p); 557 /* make unix special files (block, char, fifo, socket) */ 558 int (*make_node)(unsigned int xid, 559 struct inode *inode, 560 struct dentry *dentry, 561 struct cifs_tcon *tcon, 562 const char *full_path, 563 umode_t mode, 564 dev_t device_number); 565 /* version specific fiemap implementation */ 566 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 567 struct fiemap_extent_info *, u64, u64); 568 /* version specific llseek implementation */ 569 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 570 /* Check for STATUS_IO_TIMEOUT */ 571 bool (*is_status_io_timeout)(char *buf); 572 /* Check for STATUS_NETWORK_NAME_DELETED */ 573 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 574 int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, 575 struct kvec *rsp_iov, 576 struct cifs_open_info_data *data); 577 }; 578 579 struct smb_version_values { 580 char *version_string; 581 __u16 protocol_id; 582 __u32 req_capabilities; 583 __u32 large_lock_type; 584 __u32 exclusive_lock_type; 585 __u32 shared_lock_type; 586 __u32 unlock_lock_type; 587 size_t header_preamble_size; 588 size_t header_size; 589 size_t max_header_size; 590 size_t read_rsp_size; 591 __le16 lock_cmd; 592 unsigned int cap_unix; 593 unsigned int cap_nt_find; 594 unsigned int cap_large_files; 595 __u16 signing_enabled; 596 __u16 signing_required; 597 size_t create_lease_size; 598 }; 599 600 #define HEADER_SIZE(server) (server->vals->header_size) 601 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 602 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 603 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 604 605 /** 606 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 607 * trying to reuse existing superblock for a new mount 608 */ 609 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 610 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 611 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 612 CIFS_MOUNT_MAP_SFM_CHR | \ 613 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 614 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 615 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 616 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 617 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 618 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 619 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 620 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 621 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 622 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 623 624 /** 625 * Generic VFS superblock mount flags (s_flags) to consider when 626 * trying to reuse existing superblock for a new mount 627 */ 628 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 629 SB_NODEV | SB_SYNCHRONOUS) 630 631 struct cifs_mnt_data { 632 struct cifs_sb_info *cifs_sb; 633 struct smb3_fs_context *ctx; 634 int flags; 635 }; 636 637 static inline unsigned int 638 get_rfc1002_length(void *buf) 639 { 640 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 641 } 642 643 static inline void 644 inc_rfc1001_len(void *buf, int count) 645 { 646 be32_add_cpu((__be32 *)buf, count); 647 } 648 649 struct TCP_Server_Info { 650 struct list_head tcp_ses_list; 651 struct list_head smb_ses_list; 652 spinlock_t srv_lock; /* protect anything here that is not protected */ 653 __u64 conn_id; /* connection identifier (useful for debugging) */ 654 int srv_count; /* reference counter */ 655 /* 15 character server name + 0x20 16th byte indicating type = srv */ 656 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 657 struct smb_version_operations *ops; 658 struct smb_version_values *vals; 659 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 660 enum statusEnum tcpStatus; /* what we think the status is */ 661 char *hostname; /* hostname portion of UNC string */ 662 struct socket *ssocket; 663 struct sockaddr_storage dstaddr; 664 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 665 #ifdef CONFIG_NET_NS 666 struct net *net; 667 #endif 668 wait_queue_head_t response_q; 669 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 670 spinlock_t mid_lock; /* protect mid queue and it's entries */ 671 struct list_head pending_mid_q; 672 bool noblocksnd; /* use blocking sendmsg */ 673 bool noautotune; /* do not autotune send buf sizes */ 674 bool nosharesock; 675 bool tcp_nodelay; 676 bool terminate; 677 unsigned int credits; /* send no more requests at once */ 678 unsigned int max_credits; /* can override large 32000 default at mnt */ 679 unsigned int in_flight; /* number of requests on the wire to server */ 680 unsigned int max_in_flight; /* max number of requests that were on wire */ 681 spinlock_t req_lock; /* protect the two values above */ 682 struct mutex _srv_mutex; 683 unsigned int nofs_flag; 684 struct task_struct *tsk; 685 char server_GUID[16]; 686 __u16 sec_mode; 687 bool sign; /* is signing enabled on this connection? */ 688 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 689 bool session_estab; /* mark when very first sess is established */ 690 int echo_credits; /* echo reserved slots */ 691 int oplock_credits; /* oplock break reserved slots */ 692 bool echoes:1; /* enable echoes */ 693 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 694 u16 dialect; /* dialect index that server chose */ 695 bool oplocks:1; /* enable oplocks */ 696 unsigned int maxReq; /* Clients should submit no more */ 697 /* than maxReq distinct unanswered SMBs to the server when using */ 698 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 699 unsigned int maxBuf; /* maxBuf specifies the maximum */ 700 /* message size the server can send or receive for non-raw SMBs */ 701 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 702 /* when socket is setup (and during reconnect) before NegProt sent */ 703 unsigned int max_rw; /* maxRw specifies the maximum */ 704 /* message size the server can send or receive for */ 705 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 706 unsigned int capabilities; /* selective disabling of caps by smb sess */ 707 int timeAdj; /* Adjust for difference in server time zone in sec */ 708 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 709 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 710 /* 16th byte of RFC1001 workstation name is always null */ 711 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 712 __u32 sequence_number; /* for signing, protected by srv_mutex */ 713 __u32 reconnect_instance; /* incremented on each reconnect */ 714 struct session_key session_key; 715 unsigned long lstrp; /* when we got last response from this server */ 716 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 717 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 718 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 719 char negflavor; /* NEGOTIATE response flavor */ 720 /* extended security flavors that server supports */ 721 bool sec_ntlmssp; /* supports NTLMSSP */ 722 bool sec_kerberosu2u; /* supports U2U Kerberos */ 723 bool sec_kerberos; /* supports plain Kerberos */ 724 bool sec_mskerberos; /* supports legacy MS Kerberos */ 725 bool large_buf; /* is current buffer large? */ 726 /* use SMBD connection instead of socket */ 727 bool rdma; 728 /* point to the SMBD connection if RDMA is used instead of socket */ 729 struct smbd_connection *smbd_conn; 730 struct delayed_work echo; /* echo ping workqueue job */ 731 char *smallbuf; /* pointer to current "small" buffer */ 732 char *bigbuf; /* pointer to current "big" buffer */ 733 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 734 unsigned int pdu_size; 735 unsigned int total_read; /* total amount of data read in this pass */ 736 atomic_t in_send; /* requests trying to send */ 737 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 738 #ifdef CONFIG_CIFS_STATS2 739 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 740 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 741 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 742 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 743 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 744 #endif /* STATS2 */ 745 unsigned int max_read; 746 unsigned int max_write; 747 unsigned int min_offload; 748 __le16 compress_algorithm; 749 __u16 signing_algorithm; 750 __le16 cipher_type; 751 /* save initital negprot hash */ 752 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 753 bool signing_negotiated; /* true if valid signing context rcvd from server */ 754 bool posix_ext_supported; 755 struct delayed_work reconnect; /* reconnect workqueue job */ 756 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 757 unsigned long echo_interval; 758 759 /* 760 * Number of targets available for reconnect. The more targets 761 * the more tasks have to wait to let the demultiplex thread 762 * reconnect. 763 */ 764 int nr_targets; 765 bool noblockcnt; /* use non-blocking connect() */ 766 767 /* 768 * If this is a session channel, 769 * primary_server holds the ref-counted 770 * pointer to primary channel connection for the session. 771 */ 772 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 773 struct TCP_Server_Info *primary_server; 774 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 775 776 #ifdef CONFIG_CIFS_SWN_UPCALL 777 bool use_swn_dstaddr; 778 struct sockaddr_storage swn_dstaddr; 779 #endif 780 struct mutex refpath_lock; /* protects leaf_fullpath */ 781 /* 782 * leaf_fullpath: Canonical DFS referral path related to this 783 * connection. 784 * It is used in DFS cache refresher, reconnect and may 785 * change due to nested DFS links. 786 * 787 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 788 * mostly used for not requiring a copy of @leaf_fullpath when getting 789 * cached or new DFS referrals (which might also sleep during I/O). 790 * While @srv_lock is held for making string and NULL comparions against 791 * both fields as in mount(2) and cache refresh. 792 * 793 * format: \\HOST\SHARE[\OPTIONAL PATH] 794 */ 795 char *leaf_fullpath; 796 }; 797 798 static inline bool is_smb1(struct TCP_Server_Info *server) 799 { 800 return HEADER_PREAMBLE_SIZE(server) != 0; 801 } 802 803 static inline void cifs_server_lock(struct TCP_Server_Info *server) 804 { 805 unsigned int nofs_flag = memalloc_nofs_save(); 806 807 mutex_lock(&server->_srv_mutex); 808 server->nofs_flag = nofs_flag; 809 } 810 811 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 812 { 813 unsigned int nofs_flag = server->nofs_flag; 814 815 mutex_unlock(&server->_srv_mutex); 816 memalloc_nofs_restore(nofs_flag); 817 } 818 819 struct cifs_credits { 820 unsigned int value; 821 unsigned int instance; 822 }; 823 824 static inline unsigned int 825 in_flight(struct TCP_Server_Info *server) 826 { 827 unsigned int num; 828 829 spin_lock(&server->req_lock); 830 num = server->in_flight; 831 spin_unlock(&server->req_lock); 832 return num; 833 } 834 835 static inline bool 836 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 837 { 838 int num; 839 840 spin_lock(&server->req_lock); 841 num = *credits; 842 spin_unlock(&server->req_lock); 843 return num >= num_credits; 844 } 845 846 static inline void 847 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 848 const int optype) 849 { 850 server->ops->add_credits(server, credits, optype); 851 } 852 853 static inline void 854 add_credits_and_wake_if(struct TCP_Server_Info *server, 855 const struct cifs_credits *credits, const int optype) 856 { 857 if (credits->value) { 858 server->ops->add_credits(server, credits, optype); 859 wake_up(&server->request_q); 860 } 861 } 862 863 static inline void 864 set_credits(struct TCP_Server_Info *server, const int val) 865 { 866 server->ops->set_credits(server, val); 867 } 868 869 static inline int 870 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 871 const unsigned int payload_size) 872 { 873 return server->ops->adjust_credits ? 874 server->ops->adjust_credits(server, credits, payload_size) : 0; 875 } 876 877 static inline __le64 878 get_next_mid64(struct TCP_Server_Info *server) 879 { 880 return cpu_to_le64(server->ops->get_next_mid(server)); 881 } 882 883 static inline __le16 884 get_next_mid(struct TCP_Server_Info *server) 885 { 886 __u16 mid = server->ops->get_next_mid(server); 887 /* 888 * The value in the SMB header should be little endian for easy 889 * on-the-wire decoding. 890 */ 891 return cpu_to_le16(mid); 892 } 893 894 static inline void 895 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 896 { 897 if (server->ops->revert_current_mid) 898 server->ops->revert_current_mid(server, val); 899 } 900 901 static inline void 902 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 903 const struct smb2_hdr *shdr) 904 { 905 unsigned int num = le16_to_cpu(shdr->CreditCharge); 906 907 return revert_current_mid(server, num > 0 ? num : 1); 908 } 909 910 static inline __u16 911 get_mid(const struct smb_hdr *smb) 912 { 913 return le16_to_cpu(smb->Mid); 914 } 915 916 static inline bool 917 compare_mid(__u16 mid, const struct smb_hdr *smb) 918 { 919 return mid == le16_to_cpu(smb->Mid); 920 } 921 922 /* 923 * When the server supports very large reads and writes via POSIX extensions, 924 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 925 * including the RFC1001 length. 926 * 927 * Note that this might make for "interesting" allocation problems during 928 * writeback however as we have to allocate an array of pointers for the 929 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 930 * 931 * For reads, there is a similar problem as we need to allocate an array 932 * of kvecs to handle the receive, though that should only need to be done 933 * once. 934 */ 935 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 936 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 937 938 /* 939 * When the server doesn't allow large posix writes, only allow a rsize/wsize 940 * of 2^17-1 minus the size of the call header. That allows for a read or 941 * write up to the maximum size described by RFC1002. 942 */ 943 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 944 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 945 946 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 947 948 /* 949 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 950 * those values when posix extensions aren't in force. In actuality here, we 951 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 952 * to be ok with the extra byte even though Windows doesn't send writes that 953 * are that large. 954 * 955 * Citation: 956 * 957 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 958 */ 959 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 960 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 961 962 /* 963 * Macros to allow the TCP_Server_Info->net field and related code to drop out 964 * when CONFIG_NET_NS isn't set. 965 */ 966 967 #ifdef CONFIG_NET_NS 968 969 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 970 { 971 return srv->net; 972 } 973 974 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 975 { 976 srv->net = net; 977 } 978 979 #else 980 981 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 982 { 983 return &init_net; 984 } 985 986 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 987 { 988 } 989 990 #endif 991 992 struct cifs_server_iface { 993 struct list_head iface_head; 994 struct kref refcount; 995 size_t speed; 996 size_t weight_fulfilled; 997 unsigned int num_channels; 998 unsigned int rdma_capable : 1; 999 unsigned int rss_capable : 1; 1000 unsigned int is_active : 1; /* unset if non existent */ 1001 struct sockaddr_storage sockaddr; 1002 }; 1003 1004 /* release iface when last ref is dropped */ 1005 static inline void 1006 release_iface(struct kref *ref) 1007 { 1008 struct cifs_server_iface *iface = container_of(ref, 1009 struct cifs_server_iface, 1010 refcount); 1011 kfree(iface); 1012 } 1013 1014 struct cifs_chan { 1015 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1016 struct TCP_Server_Info *server; 1017 struct cifs_server_iface *iface; /* interface in use */ 1018 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1019 }; 1020 1021 /* 1022 * Session structure. One of these for each uid session with a particular host 1023 */ 1024 struct cifs_ses { 1025 struct list_head smb_ses_list; 1026 struct list_head rlist; /* reconnect list */ 1027 struct list_head tcon_list; 1028 struct cifs_tcon *tcon_ipc; 1029 spinlock_t ses_lock; /* protect anything here that is not protected */ 1030 struct mutex session_mutex; 1031 struct TCP_Server_Info *server; /* pointer to server info */ 1032 int ses_count; /* reference counter */ 1033 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1034 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1035 char *serverOS; /* name of operating system underlying server */ 1036 char *serverNOS; /* name of network operating system of server */ 1037 char *serverDomain; /* security realm of server */ 1038 __u64 Suid; /* remote smb uid */ 1039 kuid_t linux_uid; /* overriding owner of files on the mount */ 1040 kuid_t cred_uid; /* owner of credentials */ 1041 unsigned int capabilities; 1042 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1043 char *user_name; /* must not be null except during init of sess 1044 and after mount option parsing we fill it */ 1045 char *domainName; 1046 char *password; 1047 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1048 struct session_key auth_key; 1049 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1050 enum securityEnum sectype; /* what security flavor was specified? */ 1051 bool sign; /* is signing required? */ 1052 bool domainAuto:1; 1053 __u16 session_flags; 1054 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1055 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1056 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1057 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1058 1059 /* 1060 * Network interfaces available on the server this session is 1061 * connected to. 1062 * 1063 * Other channels can be opened by connecting and binding this 1064 * session to interfaces from this list. 1065 * 1066 * iface_lock should be taken when accessing any of these fields 1067 */ 1068 spinlock_t iface_lock; 1069 /* ========= begin: protected by iface_lock ======== */ 1070 struct list_head iface_list; 1071 size_t iface_count; 1072 unsigned long iface_last_update; /* jiffies */ 1073 /* ========= end: protected by iface_lock ======== */ 1074 1075 spinlock_t chan_lock; 1076 /* ========= begin: protected by chan_lock ======== */ 1077 #define CIFS_MAX_CHANNELS 16 1078 #define CIFS_INVAL_CHAN_INDEX (-1) 1079 #define CIFS_ALL_CHANNELS_SET(ses) \ 1080 ((1UL << (ses)->chan_count) - 1) 1081 #define CIFS_ALL_CHANS_GOOD(ses) \ 1082 (!(ses)->chans_need_reconnect) 1083 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1084 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1085 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1086 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1087 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1088 test_bit((index), &(ses)->chans_need_reconnect) 1089 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1090 ((ses)->chans[(index)].in_reconnect) 1091 1092 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1093 size_t chan_count; 1094 size_t chan_max; 1095 atomic_t chan_seq; /* round robin state */ 1096 1097 /* 1098 * chans_need_reconnect is a bitmap indicating which of the channels 1099 * under this smb session needs to be reconnected. 1100 * If not multichannel session, only one bit will be used. 1101 * 1102 * We will ask for sess and tcon reconnection only if all the 1103 * channels are marked for needing reconnection. This will 1104 * enable the sessions on top to continue to live till any 1105 * of the channels below are active. 1106 */ 1107 unsigned long chans_need_reconnect; 1108 /* ========= end: protected by chan_lock ======== */ 1109 struct cifs_ses *dfs_root_ses; 1110 struct nls_table *local_nls; 1111 }; 1112 1113 static inline bool 1114 cap_unix(struct cifs_ses *ses) 1115 { 1116 return ses->server->vals->cap_unix & ses->capabilities; 1117 } 1118 1119 /* 1120 * common struct for holding inode info when searching for or updating an 1121 * inode with new info 1122 */ 1123 1124 #define CIFS_FATTR_JUNCTION 0x1 1125 #define CIFS_FATTR_DELETE_PENDING 0x2 1126 #define CIFS_FATTR_NEED_REVAL 0x4 1127 #define CIFS_FATTR_INO_COLLISION 0x8 1128 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1129 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1130 1131 struct cifs_fattr { 1132 u32 cf_flags; 1133 u32 cf_cifsattrs; 1134 u64 cf_uniqueid; 1135 u64 cf_eof; 1136 u64 cf_bytes; 1137 u64 cf_createtime; 1138 kuid_t cf_uid; 1139 kgid_t cf_gid; 1140 umode_t cf_mode; 1141 dev_t cf_rdev; 1142 unsigned int cf_nlink; 1143 unsigned int cf_dtype; 1144 struct timespec64 cf_atime; 1145 struct timespec64 cf_mtime; 1146 struct timespec64 cf_ctime; 1147 u32 cf_cifstag; 1148 char *cf_symlink_target; 1149 }; 1150 1151 /* 1152 * there is one of these for each connection to a resource on a particular 1153 * session 1154 */ 1155 struct cifs_tcon { 1156 struct list_head tcon_list; 1157 int tc_count; 1158 struct list_head rlist; /* reconnect list */ 1159 spinlock_t tc_lock; /* protect anything here that is not protected */ 1160 atomic_t num_local_opens; /* num of all opens including disconnected */ 1161 atomic_t num_remote_opens; /* num of all network opens on server */ 1162 struct list_head openFileList; 1163 spinlock_t open_file_lock; /* protects list above */ 1164 struct cifs_ses *ses; /* pointer to session associated with */ 1165 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1166 char *nativeFileSystem; 1167 char *password; /* for share-level security */ 1168 __u32 tid; /* The 4 byte tree id */ 1169 __u16 Flags; /* optional support bits */ 1170 enum tid_status_enum status; 1171 atomic_t num_smbs_sent; 1172 union { 1173 struct { 1174 atomic_t num_writes; 1175 atomic_t num_reads; 1176 atomic_t num_flushes; 1177 atomic_t num_oplock_brks; 1178 atomic_t num_opens; 1179 atomic_t num_closes; 1180 atomic_t num_deletes; 1181 atomic_t num_mkdirs; 1182 atomic_t num_posixopens; 1183 atomic_t num_posixmkdirs; 1184 atomic_t num_rmdirs; 1185 atomic_t num_renames; 1186 atomic_t num_t2renames; 1187 atomic_t num_ffirst; 1188 atomic_t num_fnext; 1189 atomic_t num_fclose; 1190 atomic_t num_hardlinks; 1191 atomic_t num_symlinks; 1192 atomic_t num_locks; 1193 atomic_t num_acl_get; 1194 atomic_t num_acl_set; 1195 } cifs_stats; 1196 struct { 1197 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1198 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1199 } smb2_stats; 1200 } stats; 1201 __u64 bytes_read; 1202 __u64 bytes_written; 1203 spinlock_t stat_lock; /* protects the two fields above */ 1204 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1205 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1206 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1207 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1208 bool pipe:1; /* set if connection to pipe share */ 1209 bool print:1; /* set if connection to printer share */ 1210 bool retry:1; 1211 bool nocase:1; 1212 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1213 bool nodelete:1; 1214 bool seal:1; /* transport encryption for this mounted share */ 1215 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1216 for this mount even if server would support */ 1217 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1218 bool local_lease:1; /* check leases (only) on local system not remote */ 1219 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1220 bool broken_sparse_sup; /* if server or share does not support sparse */ 1221 bool need_reconnect:1; /* connection reset, tid now invalid */ 1222 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1223 bool use_resilient:1; /* use resilient instead of durable handles */ 1224 bool use_persistent:1; /* use persistent instead of durable handles */ 1225 bool no_lease:1; /* Do not request leases on files or directories */ 1226 bool use_witness:1; /* use witness protocol */ 1227 __le32 capabilities; 1228 __u32 share_flags; 1229 __u32 maximal_access; 1230 __u32 vol_serial_number; 1231 __le64 vol_create_time; 1232 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1233 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1234 __u32 ss_flags; /* sector size flags */ 1235 __u32 perf_sector_size; /* best sector size for perf */ 1236 __u32 max_chunks; 1237 __u32 max_bytes_chunk; 1238 __u32 max_bytes_copy; 1239 __u32 max_cached_dirs; 1240 #ifdef CONFIG_CIFS_FSCACHE 1241 u64 resource_id; /* server resource id */ 1242 struct fscache_volume *fscache; /* cookie for share */ 1243 #endif 1244 struct list_head pending_opens; /* list of incomplete opens */ 1245 struct cached_fids *cfids; 1246 /* BB add field for back pointer to sb struct(s)? */ 1247 #ifdef CONFIG_CIFS_DFS_UPCALL 1248 struct list_head dfs_ses_list; 1249 struct delayed_work dfs_cache_work; 1250 #endif 1251 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1252 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1253 }; 1254 1255 /* 1256 * This is a refcounted and timestamped container for a tcon pointer. The 1257 * container holds a tcon reference. It is considered safe to free one of 1258 * these when the tl_count goes to 0. The tl_time is the time of the last 1259 * "get" on the container. 1260 */ 1261 struct tcon_link { 1262 struct rb_node tl_rbnode; 1263 kuid_t tl_uid; 1264 unsigned long tl_flags; 1265 #define TCON_LINK_MASTER 0 1266 #define TCON_LINK_PENDING 1 1267 #define TCON_LINK_IN_TREE 2 1268 unsigned long tl_time; 1269 atomic_t tl_count; 1270 struct cifs_tcon *tl_tcon; 1271 }; 1272 1273 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1274 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1275 1276 static inline struct cifs_tcon * 1277 tlink_tcon(struct tcon_link *tlink) 1278 { 1279 return tlink->tl_tcon; 1280 } 1281 1282 static inline struct tcon_link * 1283 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1284 { 1285 return cifs_sb->master_tlink; 1286 } 1287 1288 extern void cifs_put_tlink(struct tcon_link *tlink); 1289 1290 static inline struct tcon_link * 1291 cifs_get_tlink(struct tcon_link *tlink) 1292 { 1293 if (tlink && !IS_ERR(tlink)) 1294 atomic_inc(&tlink->tl_count); 1295 return tlink; 1296 } 1297 1298 /* This function is always expected to succeed */ 1299 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1300 1301 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1302 1303 struct cifs_pending_open { 1304 struct list_head olist; 1305 struct tcon_link *tlink; 1306 __u8 lease_key[16]; 1307 __u32 oplock; 1308 }; 1309 1310 struct cifs_deferred_close { 1311 struct list_head dlist; 1312 struct tcon_link *tlink; 1313 __u16 netfid; 1314 __u64 persistent_fid; 1315 __u64 volatile_fid; 1316 }; 1317 1318 /* 1319 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1320 * This is used to track byte stream locks on the file 1321 */ 1322 struct cifsLockInfo { 1323 struct list_head llist; /* pointer to next cifsLockInfo */ 1324 struct list_head blist; /* pointer to locks blocked on this */ 1325 wait_queue_head_t block_q; 1326 __u64 offset; 1327 __u64 length; 1328 __u32 pid; 1329 __u16 type; 1330 __u16 flags; 1331 }; 1332 1333 /* 1334 * One of these for each open instance of a file 1335 */ 1336 struct cifs_search_info { 1337 loff_t index_of_last_entry; 1338 __u16 entries_in_buffer; 1339 __u16 info_level; 1340 __u32 resume_key; 1341 char *ntwrk_buf_start; 1342 char *srch_entries_start; 1343 char *last_entry; 1344 const char *presume_name; 1345 unsigned int resume_name_len; 1346 bool endOfSearch:1; 1347 bool emptyDir:1; 1348 bool unicode:1; 1349 bool smallBuf:1; /* so we know which buf_release function to call */ 1350 }; 1351 1352 #define ACL_NO_MODE ((umode_t)(-1)) 1353 struct cifs_open_parms { 1354 struct cifs_tcon *tcon; 1355 struct cifs_sb_info *cifs_sb; 1356 int disposition; 1357 int desired_access; 1358 int create_options; 1359 const char *path; 1360 struct cifs_fid *fid; 1361 umode_t mode; 1362 bool reconnect:1; 1363 }; 1364 1365 struct cifs_fid { 1366 __u16 netfid; 1367 __u64 persistent_fid; /* persist file id for smb2 */ 1368 __u64 volatile_fid; /* volatile file id for smb2 */ 1369 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1370 __u8 create_guid[16]; 1371 __u32 access; 1372 struct cifs_pending_open *pending_open; 1373 unsigned int epoch; 1374 #ifdef CONFIG_CIFS_DEBUG2 1375 __u64 mid; 1376 #endif /* CIFS_DEBUG2 */ 1377 bool purge_cache; 1378 }; 1379 1380 struct cifs_fid_locks { 1381 struct list_head llist; 1382 struct cifsFileInfo *cfile; /* fid that owns locks */ 1383 struct list_head locks; /* locks held by fid above */ 1384 }; 1385 1386 struct cifsFileInfo { 1387 /* following two lists are protected by tcon->open_file_lock */ 1388 struct list_head tlist; /* pointer to next fid owned by tcon */ 1389 struct list_head flist; /* next fid (file instance) for this inode */ 1390 /* lock list below protected by cifsi->lock_sem */ 1391 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1392 kuid_t uid; /* allows finding which FileInfo structure */ 1393 __u32 pid; /* process id who opened file */ 1394 struct cifs_fid fid; /* file id from remote */ 1395 struct list_head rlist; /* reconnect list */ 1396 /* BB add lock scope info here if needed */ 1397 /* lock scope id (0 if none) */ 1398 struct dentry *dentry; 1399 struct tcon_link *tlink; 1400 unsigned int f_flags; 1401 bool invalidHandle:1; /* file closed via session abend */ 1402 bool swapfile:1; 1403 bool oplock_break_cancelled:1; 1404 unsigned int oplock_epoch; /* epoch from the lease break */ 1405 __u32 oplock_level; /* oplock/lease level from the lease break */ 1406 int count; 1407 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1408 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1409 struct cifs_search_info srch_inf; 1410 struct work_struct oplock_break; /* work for oplock breaks */ 1411 struct work_struct put; /* work for the final part of _put */ 1412 struct delayed_work deferred; 1413 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1414 char *symlink_target; 1415 }; 1416 1417 struct cifs_io_parms { 1418 __u16 netfid; 1419 __u64 persistent_fid; /* persist file id for smb2 */ 1420 __u64 volatile_fid; /* volatile file id for smb2 */ 1421 __u32 pid; 1422 __u64 offset; 1423 unsigned int length; 1424 struct cifs_tcon *tcon; 1425 struct TCP_Server_Info *server; 1426 }; 1427 1428 struct cifs_aio_ctx { 1429 struct kref refcount; 1430 struct list_head list; 1431 struct mutex aio_mutex; 1432 struct completion done; 1433 struct iov_iter iter; 1434 struct kiocb *iocb; 1435 struct cifsFileInfo *cfile; 1436 struct bio_vec *bv; 1437 loff_t pos; 1438 unsigned int nr_pinned_pages; 1439 ssize_t rc; 1440 unsigned int len; 1441 unsigned int total_len; 1442 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1443 bool should_dirty; 1444 /* 1445 * Indicates if this aio_ctx is for direct_io, 1446 * If yes, iter is a copy of the user passed iov_iter 1447 */ 1448 bool direct_io; 1449 }; 1450 1451 /* asynchronous read support */ 1452 struct cifs_readdata { 1453 struct kref refcount; 1454 struct list_head list; 1455 struct completion done; 1456 struct cifsFileInfo *cfile; 1457 struct address_space *mapping; 1458 struct cifs_aio_ctx *ctx; 1459 __u64 offset; 1460 ssize_t got_bytes; 1461 unsigned int bytes; 1462 pid_t pid; 1463 int result; 1464 struct work_struct work; 1465 struct iov_iter iter; 1466 struct kvec iov[2]; 1467 struct TCP_Server_Info *server; 1468 #ifdef CONFIG_CIFS_SMB_DIRECT 1469 struct smbd_mr *mr; 1470 #endif 1471 struct cifs_credits credits; 1472 }; 1473 1474 /* asynchronous write support */ 1475 struct cifs_writedata { 1476 struct kref refcount; 1477 struct list_head list; 1478 struct completion done; 1479 enum writeback_sync_modes sync_mode; 1480 struct work_struct work; 1481 struct cifsFileInfo *cfile; 1482 struct cifs_aio_ctx *ctx; 1483 struct iov_iter iter; 1484 struct bio_vec *bv; 1485 __u64 offset; 1486 pid_t pid; 1487 unsigned int bytes; 1488 int result; 1489 struct TCP_Server_Info *server; 1490 #ifdef CONFIG_CIFS_SMB_DIRECT 1491 struct smbd_mr *mr; 1492 #endif 1493 struct cifs_credits credits; 1494 }; 1495 1496 /* 1497 * Take a reference on the file private data. Must be called with 1498 * cfile->file_info_lock held. 1499 */ 1500 static inline void 1501 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1502 { 1503 ++cifs_file->count; 1504 } 1505 1506 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1507 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1508 bool offload); 1509 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1510 1511 #define CIFS_CACHE_READ_FLG 1 1512 #define CIFS_CACHE_HANDLE_FLG 2 1513 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1514 #define CIFS_CACHE_WRITE_FLG 4 1515 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1516 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1517 1518 #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)) 1519 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1520 #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)) 1521 1522 /* 1523 * One of these for each file inode 1524 */ 1525 1526 struct cifsInodeInfo { 1527 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1528 bool can_cache_brlcks; 1529 struct list_head llist; /* locks helb by this inode */ 1530 /* 1531 * NOTE: Some code paths call down_read(lock_sem) twice, so 1532 * we must always use cifs_down_write() instead of down_write() 1533 * for this semaphore to avoid deadlocks. 1534 */ 1535 struct rw_semaphore lock_sem; /* protect the fields above */ 1536 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1537 struct list_head openFileList; 1538 spinlock_t open_file_lock; /* protects openFileList */ 1539 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1540 unsigned int oplock; /* oplock/lease level we have */ 1541 unsigned int epoch; /* used to track lease state changes */ 1542 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1543 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1544 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1545 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1546 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1547 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1548 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1549 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1550 unsigned long flags; 1551 spinlock_t writers_lock; 1552 unsigned int writers; /* Number of writers on this inode */ 1553 unsigned long time; /* jiffies of last update of inode */ 1554 u64 server_eof; /* current file size on server -- protected by i_lock */ 1555 u64 uniqueid; /* server inode number */ 1556 u64 createtime; /* creation time on server */ 1557 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1558 struct list_head deferred_closes; /* list of deferred closes */ 1559 spinlock_t deferred_lock; /* protection on deferred list */ 1560 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1561 char *symlink_target; 1562 }; 1563 1564 static inline struct cifsInodeInfo * 1565 CIFS_I(struct inode *inode) 1566 { 1567 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1568 } 1569 1570 static inline struct cifs_sb_info * 1571 CIFS_SB(struct super_block *sb) 1572 { 1573 return sb->s_fs_info; 1574 } 1575 1576 static inline struct cifs_sb_info * 1577 CIFS_FILE_SB(struct file *file) 1578 { 1579 return CIFS_SB(file_inode(file)->i_sb); 1580 } 1581 1582 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1583 { 1584 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1585 return '/'; 1586 else 1587 return '\\'; 1588 } 1589 1590 static inline void 1591 convert_delimiter(char *path, char delim) 1592 { 1593 char old_delim, *pos; 1594 1595 if (delim == '/') 1596 old_delim = '\\'; 1597 else 1598 old_delim = '/'; 1599 1600 pos = path; 1601 while ((pos = strchr(pos, old_delim))) 1602 *pos = delim; 1603 } 1604 1605 #define cifs_stats_inc atomic_inc 1606 1607 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1608 unsigned int bytes) 1609 { 1610 if (bytes) { 1611 spin_lock(&tcon->stat_lock); 1612 tcon->bytes_written += bytes; 1613 spin_unlock(&tcon->stat_lock); 1614 } 1615 } 1616 1617 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1618 unsigned int bytes) 1619 { 1620 spin_lock(&tcon->stat_lock); 1621 tcon->bytes_read += bytes; 1622 spin_unlock(&tcon->stat_lock); 1623 } 1624 1625 1626 /* 1627 * This is the prototype for the mid receive function. This function is for 1628 * receiving the rest of the SMB frame, starting with the WordCount (which is 1629 * just after the MID in struct smb_hdr). Note: 1630 * 1631 * - This will be called by cifsd, with no locks held. 1632 * - The mid will still be on the pending_mid_q. 1633 * - mid->resp_buf will point to the current buffer. 1634 * 1635 * Returns zero on a successful receive, or an error. The receive state in 1636 * the TCP_Server_Info will also be updated. 1637 */ 1638 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1639 struct mid_q_entry *mid); 1640 1641 /* 1642 * This is the prototype for the mid callback function. This is called once the 1643 * mid has been received off of the socket. When creating one, take special 1644 * care to avoid deadlocks. Things to bear in mind: 1645 * 1646 * - it will be called by cifsd, with no locks held 1647 * - the mid will be removed from any lists 1648 */ 1649 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1650 1651 /* 1652 * This is the protopyte for mid handle function. This is called once the mid 1653 * has been recognized after decryption of the message. 1654 */ 1655 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1656 struct mid_q_entry *mid); 1657 1658 /* one of these for every pending CIFS request to the server */ 1659 struct mid_q_entry { 1660 struct list_head qhead; /* mids waiting on reply from this server */ 1661 struct kref refcount; 1662 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1663 __u64 mid; /* multiplex id */ 1664 __u16 credits; /* number of credits consumed by this mid */ 1665 __u16 credits_received; /* number of credits from the response */ 1666 __u32 pid; /* process id */ 1667 __u32 sequence_number; /* for CIFS signing */ 1668 unsigned long when_alloc; /* when mid was created */ 1669 #ifdef CONFIG_CIFS_STATS2 1670 unsigned long when_sent; /* time when smb send finished */ 1671 unsigned long when_received; /* when demux complete (taken off wire) */ 1672 #endif 1673 mid_receive_t *receive; /* call receive callback */ 1674 mid_callback_t *callback; /* call completion callback */ 1675 mid_handle_t *handle; /* call handle mid callback */ 1676 void *callback_data; /* general purpose pointer for callback */ 1677 struct task_struct *creator; 1678 void *resp_buf; /* pointer to received SMB header */ 1679 unsigned int resp_buf_size; 1680 int mid_state; /* wish this were enum but can not pass to wait_event */ 1681 unsigned int mid_flags; 1682 __le16 command; /* smb command code */ 1683 unsigned int optype; /* operation type */ 1684 bool large_buf:1; /* if valid response, is pointer to large buf */ 1685 bool multiRsp:1; /* multiple trans2 responses for one request */ 1686 bool multiEnd:1; /* both received */ 1687 bool decrypted:1; /* decrypted entry */ 1688 }; 1689 1690 struct close_cancelled_open { 1691 struct cifs_fid fid; 1692 struct cifs_tcon *tcon; 1693 struct work_struct work; 1694 __u64 mid; 1695 __u16 cmd; 1696 }; 1697 1698 /* Make code in transport.c a little cleaner by moving 1699 update of optional stats into function below */ 1700 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1701 { 1702 atomic_inc(&server->in_send); 1703 } 1704 1705 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1706 { 1707 atomic_dec(&server->in_send); 1708 } 1709 1710 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1711 { 1712 atomic_inc(&server->num_waiters); 1713 } 1714 1715 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1716 { 1717 atomic_dec(&server->num_waiters); 1718 } 1719 1720 #ifdef CONFIG_CIFS_STATS2 1721 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1722 { 1723 mid->when_sent = jiffies; 1724 } 1725 #else 1726 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1727 { 1728 } 1729 #endif 1730 1731 /* for pending dnotify requests */ 1732 struct dir_notify_req { 1733 struct list_head lhead; 1734 __le16 Pid; 1735 __le16 PidHigh; 1736 __u16 Mid; 1737 __u16 Tid; 1738 __u16 Uid; 1739 __u16 netfid; 1740 __u32 filter; /* CompletionFilter (for multishot) */ 1741 int multishot; 1742 struct file *pfile; 1743 }; 1744 1745 struct dfs_info3_param { 1746 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1747 int path_consumed; 1748 int server_type; 1749 int ref_flag; 1750 char *path_name; 1751 char *node_name; 1752 int ttl; 1753 }; 1754 1755 struct file_list { 1756 struct list_head list; 1757 struct cifsFileInfo *cfile; 1758 }; 1759 1760 struct cifs_mount_ctx { 1761 struct cifs_sb_info *cifs_sb; 1762 struct smb3_fs_context *fs_ctx; 1763 unsigned int xid; 1764 struct TCP_Server_Info *server; 1765 struct cifs_ses *ses; 1766 struct cifs_tcon *tcon; 1767 struct list_head dfs_ses_list; 1768 }; 1769 1770 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1771 { 1772 kfree(param->path_name); 1773 kfree(param->node_name); 1774 } 1775 1776 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1777 { 1778 if (param) 1779 __free_dfs_info_param(param); 1780 } 1781 1782 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1783 { 1784 if (param) { 1785 __free_dfs_info_param(param); 1786 memset(param, 0, sizeof(*param)); 1787 } 1788 } 1789 1790 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1791 int number_of_items) 1792 { 1793 int i; 1794 1795 if ((number_of_items == 0) || (param == NULL)) 1796 return; 1797 for (i = 0; i < number_of_items; i++) { 1798 kfree(param[i].path_name); 1799 kfree(param[i].node_name); 1800 } 1801 kfree(param); 1802 } 1803 1804 static inline bool is_interrupt_error(int error) 1805 { 1806 switch (error) { 1807 case -EINTR: 1808 case -ERESTARTSYS: 1809 case -ERESTARTNOHAND: 1810 case -ERESTARTNOINTR: 1811 return true; 1812 } 1813 return false; 1814 } 1815 1816 static inline bool is_retryable_error(int error) 1817 { 1818 if (is_interrupt_error(error) || error == -EAGAIN) 1819 return true; 1820 return false; 1821 } 1822 1823 1824 /* cifs_get_writable_file() flags */ 1825 #define FIND_WR_ANY 0 1826 #define FIND_WR_FSUID_ONLY 1 1827 #define FIND_WR_WITH_DELETE 2 1828 1829 #define MID_FREE 0 1830 #define MID_REQUEST_ALLOCATED 1 1831 #define MID_REQUEST_SUBMITTED 2 1832 #define MID_RESPONSE_RECEIVED 4 1833 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1834 #define MID_RESPONSE_MALFORMED 0x10 1835 #define MID_SHUTDOWN 0x20 1836 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1837 1838 /* Flags */ 1839 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1840 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1841 1842 /* Types of response buffer returned from SendReceive2 */ 1843 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1844 #define CIFS_SMALL_BUFFER 1 1845 #define CIFS_LARGE_BUFFER 2 1846 #define CIFS_IOVEC 4 /* array of response buffers */ 1847 1848 /* Type of Request to SendReceive2 */ 1849 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1850 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1851 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1852 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1853 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1854 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1855 1856 /* Type of request operation */ 1857 #define CIFS_ECHO_OP 0x080 /* echo request */ 1858 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1859 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1860 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1861 /* Lower bitmask values are reserved by others below. */ 1862 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1863 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1864 1865 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1866 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1867 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1868 1869 /* Security Flags: indicate type of session setup needed */ 1870 #define CIFSSEC_MAY_SIGN 0x00001 1871 #define CIFSSEC_MAY_NTLMV2 0x00004 1872 #define CIFSSEC_MAY_KRB5 0x00008 1873 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1874 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1875 1876 #define CIFSSEC_MUST_SIGN 0x01001 1877 /* note that only one of the following can be set so the 1878 result of setting MUST flags more than once will be to 1879 require use of the stronger protocol */ 1880 #define CIFSSEC_MUST_NTLMV2 0x04004 1881 #define CIFSSEC_MUST_KRB5 0x08008 1882 #ifdef CONFIG_CIFS_UPCALL 1883 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1884 #else 1885 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1886 #endif /* UPCALL */ 1887 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1888 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1889 1890 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1891 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1892 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1893 /* 1894 ***************************************************************** 1895 * All constants go here 1896 ***************************************************************** 1897 */ 1898 1899 #define UID_HASH (16) 1900 1901 /* 1902 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1903 * following to be declared. 1904 */ 1905 1906 /**************************************************************************** 1907 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1908 * to the locking order. i.e. if two locks are to be held together, the lock that 1909 * appears higher in this list needs to be taken before the other. 1910 * 1911 * If you hold a lock that is lower in this list, and you need to take a higher lock 1912 * (or if you think that one of the functions that you're calling may need to), first 1913 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1914 * ensure that locks are picked up only in one direction in the below table 1915 * (top to bottom). 1916 * 1917 * Also, if you expect a function to be called with a lock held, explicitly document 1918 * this in the comments on top of your function definition. 1919 * 1920 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1921 * possible. Blocking / calling other functions with a lock held always increase 1922 * the risk of a possible deadlock. 1923 * 1924 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1925 * debug. Also, any new lock that you introduce, please add to this list in the correct 1926 * order. 1927 * 1928 * Please populate this list whenever you introduce new locks in your changes. Or in 1929 * case I've missed some existing locks. Please ensure that it's added in the list 1930 * based on the locking order expected. 1931 * 1932 * ===================================================================================== 1933 * Lock Protects Initialization fn 1934 * ===================================================================================== 1935 * vol_list_lock 1936 * vol_info->ctx_lock vol_info->ctx 1937 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1938 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1939 * reconnect_mutex 1940 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1941 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1942 * cifs_tcon 1943 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1944 * cifs_tcon->pending_opens 1945 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1946 * cifs_tcon->bytes_written 1947 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1948 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1949 * GlobalCurrentXid 1950 * GlobalTotalActiveXid 1951 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1952 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1953 * ->CurrentMid 1954 * (any changes in mid_q_entry fields) 1955 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1956 * ->credits 1957 * ->echo_credits 1958 * ->oplock_credits 1959 * ->reconnect_instance 1960 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1961 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1962 * ->iface_count 1963 * ->iface_last_update 1964 * cifs_ses->chan_lock cifs_ses->chans 1965 * ->chans_need_reconnect 1966 * ->chans_in_reconnect 1967 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1968 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1969 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1970 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1971 * ->can_cache_brlcks 1972 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1973 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1974 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1975 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1976 * ->invalidHandle initiate_cifs_search 1977 * ->oplock_break_cancelled 1978 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 1979 ****************************************************************************/ 1980 1981 #ifdef DECLARE_GLOBALS_HERE 1982 #define GLOBAL_EXTERN 1983 #else 1984 #define GLOBAL_EXTERN extern 1985 #endif 1986 1987 /* 1988 * the list of TCP_Server_Info structures, ie each of the sockets 1989 * connecting our client to a distinct server (ip address), is 1990 * chained together by cifs_tcp_ses_list. The list of all our SMB 1991 * sessions (and from that the tree connections) can be found 1992 * by iterating over cifs_tcp_ses_list 1993 */ 1994 extern struct list_head cifs_tcp_ses_list; 1995 1996 /* 1997 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 1998 * tcp session, and the list of tcon's per smb session. It also protects 1999 * the reference counters for the server, smb session, and tcon. 2000 * generally the locks should be taken in order tcp_ses_lock before 2001 * tcon->open_file_lock and that before file->file_info_lock since the 2002 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 2003 */ 2004 extern spinlock_t cifs_tcp_ses_lock; 2005 2006 /* 2007 * Global transaction id (XID) information 2008 */ 2009 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 2010 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 2011 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 2012 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2013 2014 /* 2015 * Global counters, updated atomically 2016 */ 2017 extern atomic_t sesInfoAllocCount; 2018 extern atomic_t tconInfoAllocCount; 2019 extern atomic_t tcpSesNextId; 2020 extern atomic_t tcpSesAllocCount; 2021 extern atomic_t tcpSesReconnectCount; 2022 extern atomic_t tconInfoReconnectCount; 2023 2024 /* Various Debug counters */ 2025 extern atomic_t buf_alloc_count; /* current number allocated */ 2026 extern atomic_t small_buf_alloc_count; 2027 #ifdef CONFIG_CIFS_STATS2 2028 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2029 extern atomic_t total_small_buf_alloc_count; 2030 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2031 #endif 2032 2033 /* Misc globals */ 2034 extern bool enable_oplocks; /* enable or disable oplocks */ 2035 extern bool lookupCacheEnabled; 2036 extern unsigned int global_secflags; /* if on, session setup sent 2037 with more secure ntlmssp2 challenge/resp */ 2038 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2039 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2040 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2041 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2042 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2043 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2044 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2045 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2046 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2047 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2048 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2049 extern atomic_t mid_count; 2050 2051 void cifs_oplock_break(struct work_struct *work); 2052 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2053 void smb2_deferred_work_close(struct work_struct *work); 2054 2055 extern const struct slow_work_ops cifs_oplock_break_ops; 2056 extern struct workqueue_struct *cifsiod_wq; 2057 extern struct workqueue_struct *decrypt_wq; 2058 extern struct workqueue_struct *fileinfo_put_wq; 2059 extern struct workqueue_struct *cifsoplockd_wq; 2060 extern struct workqueue_struct *deferredclose_wq; 2061 extern __u32 cifs_lock_secret; 2062 2063 extern mempool_t *cifs_mid_poolp; 2064 2065 /* Operations for different SMB versions */ 2066 #define SMB1_VERSION_STRING "1.0" 2067 #define SMB20_VERSION_STRING "2.0" 2068 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2069 extern struct smb_version_operations smb1_operations; 2070 extern struct smb_version_values smb1_values; 2071 extern struct smb_version_operations smb20_operations; 2072 extern struct smb_version_values smb20_values; 2073 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2074 #define SMB21_VERSION_STRING "2.1" 2075 extern struct smb_version_operations smb21_operations; 2076 extern struct smb_version_values smb21_values; 2077 #define SMBDEFAULT_VERSION_STRING "default" 2078 extern struct smb_version_values smbdefault_values; 2079 #define SMB3ANY_VERSION_STRING "3" 2080 extern struct smb_version_values smb3any_values; 2081 #define SMB30_VERSION_STRING "3.0" 2082 extern struct smb_version_operations smb30_operations; 2083 extern struct smb_version_values smb30_values; 2084 #define SMB302_VERSION_STRING "3.02" 2085 #define ALT_SMB302_VERSION_STRING "3.0.2" 2086 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2087 extern struct smb_version_values smb302_values; 2088 #define SMB311_VERSION_STRING "3.1.1" 2089 #define ALT_SMB311_VERSION_STRING "3.11" 2090 extern struct smb_version_operations smb311_operations; 2091 extern struct smb_version_values smb311_values; 2092 2093 static inline char *get_security_type_str(enum securityEnum sectype) 2094 { 2095 switch (sectype) { 2096 case RawNTLMSSP: 2097 return "RawNTLMSSP"; 2098 case Kerberos: 2099 return "Kerberos"; 2100 case NTLMv2: 2101 return "NTLMv2"; 2102 default: 2103 return "Unknown"; 2104 } 2105 } 2106 2107 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2108 { 2109 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2110 } 2111 2112 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2113 { 2114 /* 2115 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2116 * Subsystem Notifies That a Share Is a DFS Share. 2117 * 2118 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2119 * Application Updates a Share. 2120 */ 2121 if (!tcon || !tcon->ses || !tcon->ses->server) 2122 return false; 2123 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2124 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2125 } 2126 2127 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2128 const struct dfs_info3_param *ref) 2129 { 2130 /* 2131 * Check if all targets are capable of handling DFS referrals as per 2132 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2133 */ 2134 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2135 } 2136 2137 static inline u64 cifs_flock_len(const struct file_lock *fl) 2138 { 2139 return (u64)fl->fl_end - fl->fl_start + 1; 2140 } 2141 2142 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2143 { 2144 if (WARN_ON_ONCE(!ses || !ses->server)) 2145 return 0; 2146 /* 2147 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2148 * servers do require it during NTLMSSP. 2149 */ 2150 if (ses->server->dialect <= SMB20_PROT_ID) 2151 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2152 return sizeof(ses->workstation_name); 2153 } 2154 2155 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2156 { 2157 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2158 dst->AccessFlags = src->AccessFlags; 2159 dst->CurrentByteOffset = src->CurrentByteOffset; 2160 dst->Mode = src->Mode; 2161 dst->AlignmentRequirement = src->AlignmentRequirement; 2162 dst->FileNameLength = src->FileNameLength; 2163 } 2164 2165 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2166 int num_rqst, 2167 const u8 *sig) 2168 { 2169 unsigned int len, skip; 2170 unsigned int nents = 0; 2171 unsigned long addr; 2172 size_t data_size; 2173 int i, j; 2174 2175 /* 2176 * The first rqst has a transform header where the first 20 bytes are 2177 * not part of the encrypted blob. 2178 */ 2179 skip = 20; 2180 2181 /* Assumes the first rqst has a transform header as the first iov. 2182 * I.e. 2183 * rqst[0].rq_iov[0] is transform header 2184 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2185 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2186 */ 2187 for (i = 0; i < num_rqst; i++) { 2188 data_size = iov_iter_count(&rqst[i].rq_iter); 2189 2190 /* We really don't want a mixture of pinned and unpinned pages 2191 * in the sglist. It's hard to keep track of which is what. 2192 * Instead, we convert to a BVEC-type iterator higher up. 2193 */ 2194 if (data_size && 2195 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2196 return -EIO; 2197 2198 /* We also don't want to have any extra refs or pins to clean 2199 * up in the sglist. 2200 */ 2201 if (data_size && 2202 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2203 return -EIO; 2204 2205 for (j = 0; j < rqst[i].rq_nvec; j++) { 2206 struct kvec *iov = &rqst[i].rq_iov[j]; 2207 2208 addr = (unsigned long)iov->iov_base + skip; 2209 if (unlikely(is_vmalloc_addr((void *)addr))) { 2210 len = iov->iov_len - skip; 2211 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2212 PAGE_SIZE); 2213 } else { 2214 nents++; 2215 } 2216 skip = 0; 2217 } 2218 if (data_size) 2219 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2220 } 2221 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2222 return nents; 2223 } 2224 2225 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2226 * stack object as buf. 2227 */ 2228 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2229 const void *buf, 2230 unsigned int buflen) 2231 { 2232 unsigned long addr = (unsigned long)buf; 2233 unsigned int off = offset_in_page(addr); 2234 2235 addr &= PAGE_MASK; 2236 if (unlikely(is_vmalloc_addr((void *)addr))) { 2237 do { 2238 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2239 2240 sg_set_page(&sgtable->sgl[sgtable->nents++], 2241 vmalloc_to_page((void *)addr), len, off); 2242 2243 off = 0; 2244 addr += PAGE_SIZE; 2245 buflen -= len; 2246 } while (buflen); 2247 } else { 2248 sg_set_page(&sgtable->sgl[sgtable->nents++], 2249 virt_to_page((void *)addr), buflen, off); 2250 } 2251 } 2252 2253 struct smb2_compound_vars { 2254 struct cifs_open_parms oparms; 2255 struct kvec rsp_iov[3]; 2256 struct smb_rqst rqst[3]; 2257 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2258 struct kvec qi_iov; 2259 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2260 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2261 struct kvec close_iov; 2262 struct smb2_file_rename_info rename_info; 2263 struct smb2_file_link_info link_info; 2264 }; 2265 2266 #endif /* _CIFS_GLOB_H */ 2267