1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002,2008 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * Jeremy Allison (jra@samba.org) 7 * 8 */ 9 #ifndef _CIFS_GLOB_H 10 #define _CIFS_GLOB_H 11 12 #include <linux/in.h> 13 #include <linux/in6.h> 14 #include <linux/inet.h> 15 #include <linux/slab.h> 16 #include <linux/scatterlist.h> 17 #include <linux/mm.h> 18 #include <linux/mempool.h> 19 #include <linux/workqueue.h> 20 #include <linux/utsname.h> 21 #include <linux/sched/mm.h> 22 #include <linux/netfs.h> 23 #include "cifs_fs_sb.h" 24 #include "cifsacl.h" 25 #include <crypto/internal/hash.h> 26 #include <uapi/linux/cifs/cifs_mount.h> 27 #include "../common/smb2pdu.h" 28 #include "smb2pdu.h" 29 #include <linux/filelock.h> 30 31 #define SMB_PATH_MAX 260 32 #define CIFS_PORT 445 33 #define RFC1001_PORT 139 34 35 /* 36 * The sizes of various internal tables and strings 37 */ 38 #define MAX_UID_INFO 16 39 #define MAX_SES_INFO 2 40 #define MAX_TCON_INFO 4 41 42 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) 43 44 #define CIFS_MIN_RCV_POOL 4 45 46 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ 47 /* 48 * default attribute cache timeout (jiffies) 49 */ 50 #define CIFS_DEF_ACTIMEO (1 * HZ) 51 52 /* 53 * max sleep time before retry to server 54 */ 55 #define CIFS_MAX_SLEEP 2000 56 57 /* 58 * max attribute cache timeout (jiffies) - 2^30 59 */ 60 #define CIFS_MAX_ACTIMEO (1 << 30) 61 62 /* 63 * Max persistent and resilient handle timeout (milliseconds). 64 * Windows durable max was 960000 (16 minutes) 65 */ 66 #define SMB3_MAX_HANDLE_TIMEOUT 960000 67 68 /* 69 * MAX_REQ is the maximum number of requests that WE will send 70 * on one socket concurrently. 71 */ 72 #define CIFS_MAX_REQ 32767 73 74 #define RFC1001_NAME_LEN 15 75 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) 76 77 /* maximum length of ip addr as a string (including ipv6 and sctp) */ 78 #define SERVER_NAME_LENGTH 80 79 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) 80 81 /* echo interval in seconds */ 82 #define SMB_ECHO_INTERVAL_MIN 1 83 #define SMB_ECHO_INTERVAL_MAX 600 84 #define SMB_ECHO_INTERVAL_DEFAULT 60 85 86 /* smb multichannel query server interfaces interval in seconds */ 87 #define SMB_INTERFACE_POLL_INTERVAL 600 88 89 /* maximum number of PDUs in one compound */ 90 #define MAX_COMPOUND 7 91 92 /* 93 * Default number of credits to keep available for SMB3. 94 * This value is chosen somewhat arbitrarily. The Windows client 95 * defaults to 128 credits, the Windows server allows clients up to 96 * 512 credits (or 8K for later versions), and the NetApp server 97 * does not limit clients at all. Choose a high enough default value 98 * such that the client shouldn't limit performance, but allow mount 99 * to override (until you approach 64K, where we limit credits to 65000 100 * to reduce possibility of seeing more server credit overflow bugs. 101 */ 102 #define SMB2_MAX_CREDITS_AVAILABLE 32000 103 104 #include "cifspdu.h" 105 106 #ifndef XATTR_DOS_ATTRIB 107 #define XATTR_DOS_ATTRIB "user.DOSATTRIB" 108 #endif 109 110 #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ 111 112 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) 113 114 /* 115 * CIFS vfs client Status information (based on what we know.) 116 */ 117 118 /* associated with each connection */ 119 enum statusEnum { 120 CifsNew = 0, 121 CifsGood, 122 CifsExiting, 123 CifsNeedReconnect, 124 CifsNeedNegotiate, 125 CifsInNegotiate, 126 }; 127 128 /* associated with each smb session */ 129 enum ses_status_enum { 130 SES_NEW = 0, 131 SES_GOOD, 132 SES_EXITING, 133 SES_NEED_RECON, 134 SES_IN_SETUP 135 }; 136 137 /* associated with each tree connection to the server */ 138 enum tid_status_enum { 139 TID_NEW = 0, 140 TID_GOOD, 141 TID_EXITING, 142 TID_NEED_RECON, 143 TID_NEED_TCON, 144 TID_IN_TCON, 145 TID_NEED_FILES_INVALIDATE, /* currently unused */ 146 TID_IN_FILES_INVALIDATE 147 }; 148 149 enum securityEnum { 150 Unspecified = 0, /* not specified */ 151 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 152 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 153 Kerberos, /* Kerberos via SPNEGO */ 154 }; 155 156 struct session_key { 157 unsigned int len; 158 char *response; 159 }; 160 161 /* crypto hashing related structure/fields, not specific to a sec mech */ 162 struct cifs_secmech { 163 struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ 164 struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ 165 struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ 166 struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ 167 struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ 168 169 struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ 170 struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ 171 }; 172 173 /* per smb session structure/fields */ 174 struct ntlmssp_auth { 175 bool sesskey_per_smbsess; /* whether session key is per smb session */ 176 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ 177 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ 178 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ 179 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ 180 }; 181 182 struct cifs_cred { 183 int uid; 184 int gid; 185 int mode; 186 int cecount; 187 struct cifs_sid osid; 188 struct cifs_sid gsid; 189 struct cifs_ntace *ntaces; 190 struct cifs_ace *aces; 191 }; 192 193 struct cifs_open_info_data { 194 bool adjust_tz; 195 union { 196 bool reparse_point; 197 bool symlink; 198 }; 199 struct { 200 /* ioctl response buffer */ 201 struct { 202 int buftype; 203 struct kvec iov; 204 } io; 205 __u32 tag; 206 union { 207 struct reparse_data_buffer *buf; 208 struct reparse_posix_data *posix; 209 }; 210 } reparse; 211 char *symlink_target; 212 struct cifs_sid posix_owner; 213 struct cifs_sid posix_group; 214 union { 215 struct smb2_file_all_info fi; 216 struct smb311_posix_qinfo posix_fi; 217 }; 218 }; 219 220 static inline bool cifs_open_data_reparse(struct cifs_open_info_data *data) 221 { 222 struct smb2_file_all_info *fi = &data->fi; 223 u32 attrs = le32_to_cpu(fi->Attributes); 224 bool ret; 225 226 ret = data->reparse_point || (attrs & ATTR_REPARSE); 227 if (ret) 228 attrs |= ATTR_REPARSE; 229 fi->Attributes = cpu_to_le32(attrs); 230 return ret; 231 } 232 233 /* 234 ***************************************************************** 235 * Except the CIFS PDUs themselves all the 236 * globally interesting structs should go here 237 ***************************************************************** 238 */ 239 240 /* 241 * A smb_rqst represents a complete request to be issued to a server. It's 242 * formed by a kvec array, followed by an array of pages. Page data is assumed 243 * to start at the beginning of the first page. 244 */ 245 struct smb_rqst { 246 struct kvec *rq_iov; /* array of kvecs */ 247 unsigned int rq_nvec; /* number of kvecs in array */ 248 size_t rq_iter_size; /* Amount of data in ->rq_iter */ 249 struct iov_iter rq_iter; /* Data iterator */ 250 struct xarray rq_buffer; /* Page buffer for encryption */ 251 }; 252 253 struct mid_q_entry; 254 struct TCP_Server_Info; 255 struct cifsFileInfo; 256 struct cifs_ses; 257 struct cifs_tcon; 258 struct dfs_info3_param; 259 struct cifs_fattr; 260 struct smb3_fs_context; 261 struct cifs_fid; 262 struct cifs_readdata; 263 struct cifs_writedata; 264 struct cifs_io_parms; 265 struct cifs_search_info; 266 struct cifsInodeInfo; 267 struct cifs_open_parms; 268 struct cifs_credits; 269 270 struct smb_version_operations { 271 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, 272 struct mid_q_entry *); 273 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); 274 /* setup request: allocate mid, sign message */ 275 struct mid_q_entry *(*setup_request)(struct cifs_ses *, 276 struct TCP_Server_Info *, 277 struct smb_rqst *); 278 /* setup async request: allocate mid, sign message */ 279 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, 280 struct smb_rqst *); 281 /* check response: verify signature, map error */ 282 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, 283 bool); 284 void (*add_credits)(struct TCP_Server_Info *server, 285 const struct cifs_credits *credits, 286 const int optype); 287 void (*set_credits)(struct TCP_Server_Info *, const int); 288 int * (*get_credits_field)(struct TCP_Server_Info *, const int); 289 unsigned int (*get_credits)(struct mid_q_entry *); 290 __u64 (*get_next_mid)(struct TCP_Server_Info *); 291 void (*revert_current_mid)(struct TCP_Server_Info *server, 292 const unsigned int val); 293 /* data offset from read response message */ 294 unsigned int (*read_data_offset)(char *); 295 /* 296 * Data length from read response message 297 * When in_remaining is true, the returned data length is in 298 * message field DataRemaining for out-of-band data read (e.g through 299 * Memory Registration RDMA write in SMBD). 300 * Otherwise, the returned data length is in message field DataLength. 301 */ 302 unsigned int (*read_data_length)(char *, bool in_remaining); 303 /* map smb to linux error */ 304 int (*map_error)(char *, bool); 305 /* find mid corresponding to the response message */ 306 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); 307 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); 308 void (*clear_stats)(struct cifs_tcon *); 309 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 310 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); 311 /* verify the message */ 312 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); 313 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 314 int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); 315 void (*downgrade_oplock)(struct TCP_Server_Info *server, 316 struct cifsInodeInfo *cinode, __u32 oplock, 317 unsigned int epoch, bool *purge_cache); 318 /* process transaction2 response */ 319 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, 320 char *, int); 321 /* check if we need to negotiate */ 322 bool (*need_neg)(struct TCP_Server_Info *); 323 /* negotiate to the server */ 324 int (*negotiate)(const unsigned int xid, 325 struct cifs_ses *ses, 326 struct TCP_Server_Info *server); 327 /* set negotiated write size */ 328 unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 329 /* set negotiated read size */ 330 unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); 331 /* setup smb sessionn */ 332 int (*sess_setup)(const unsigned int, struct cifs_ses *, 333 struct TCP_Server_Info *server, 334 const struct nls_table *); 335 /* close smb session */ 336 int (*logoff)(const unsigned int, struct cifs_ses *); 337 /* connect to a server share */ 338 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, 339 struct cifs_tcon *, const struct nls_table *); 340 /* close tree connecion */ 341 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); 342 /* get DFS referrals */ 343 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, 344 const char *, struct dfs_info3_param **, 345 unsigned int *, const struct nls_table *, int); 346 /* informational QFS call */ 347 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, 348 struct cifs_sb_info *); 349 /* check if a path is accessible or not */ 350 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, 351 struct cifs_sb_info *, const char *); 352 /* query path data from the server */ 353 int (*query_path_info)(const unsigned int xid, 354 struct cifs_tcon *tcon, 355 struct cifs_sb_info *cifs_sb, 356 const char *full_path, 357 struct cifs_open_info_data *data); 358 /* query file data from the server */ 359 int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, 360 struct cifsFileInfo *cfile, struct cifs_open_info_data *data); 361 /* query reparse point to determine which type of special file */ 362 int (*query_reparse_point)(const unsigned int xid, 363 struct cifs_tcon *tcon, 364 struct cifs_sb_info *cifs_sb, 365 const char *full_path, 366 u32 *tag, struct kvec *rsp, 367 int *rsp_buftype); 368 /* get server index number */ 369 int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, 370 struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, 371 struct cifs_open_info_data *data); 372 /* set size by path */ 373 int (*set_path_size)(const unsigned int, struct cifs_tcon *, 374 const char *, __u64, struct cifs_sb_info *, bool); 375 /* set size by file handle */ 376 int (*set_file_size)(const unsigned int, struct cifs_tcon *, 377 struct cifsFileInfo *, __u64, bool); 378 /* set attributes */ 379 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, 380 const unsigned int); 381 int (*set_compression)(const unsigned int, struct cifs_tcon *, 382 struct cifsFileInfo *); 383 /* check if we can send an echo or nor */ 384 bool (*can_echo)(struct TCP_Server_Info *); 385 /* send echo request */ 386 int (*echo)(struct TCP_Server_Info *); 387 /* create directory */ 388 int (*posix_mkdir)(const unsigned int xid, struct inode *inode, 389 umode_t mode, struct cifs_tcon *tcon, 390 const char *full_path, 391 struct cifs_sb_info *cifs_sb); 392 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, 393 struct cifs_tcon *tcon, const char *name, 394 struct cifs_sb_info *sb); 395 /* set info on created directory */ 396 void (*mkdir_setinfo)(struct inode *, const char *, 397 struct cifs_sb_info *, struct cifs_tcon *, 398 const unsigned int); 399 /* remove directory */ 400 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, 401 struct cifs_sb_info *); 402 /* unlink file */ 403 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, 404 struct cifs_sb_info *); 405 /* open, rename and delete file */ 406 int (*rename_pending_delete)(const char *, struct dentry *, 407 const unsigned int); 408 /* send rename request */ 409 int (*rename)(const unsigned int xid, 410 struct cifs_tcon *tcon, 411 struct dentry *source_dentry, 412 const char *from_name, const char *to_name, 413 struct cifs_sb_info *cifs_sb); 414 /* send create hardlink request */ 415 int (*create_hardlink)(const unsigned int xid, 416 struct cifs_tcon *tcon, 417 struct dentry *source_dentry, 418 const char *from_name, const char *to_name, 419 struct cifs_sb_info *cifs_sb); 420 /* query symlink target */ 421 int (*query_symlink)(const unsigned int xid, 422 struct cifs_tcon *tcon, 423 struct cifs_sb_info *cifs_sb, 424 const char *full_path, 425 char **target_path); 426 /* open a file for non-posix mounts */ 427 int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, 428 void *buf); 429 /* set fid protocol-specific info */ 430 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); 431 /* close a file */ 432 void (*close)(const unsigned int, struct cifs_tcon *, 433 struct cifs_fid *); 434 /* close a file, returning file attributes and timestamps */ 435 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, 436 struct cifsFileInfo *pfile_info); 437 /* send a flush request to the server */ 438 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); 439 /* async read from the server */ 440 int (*async_readv)(struct cifs_readdata *); 441 /* async write to the server */ 442 int (*async_writev)(struct cifs_writedata *, 443 void (*release)(struct kref *)); 444 /* sync read from the server */ 445 int (*sync_read)(const unsigned int, struct cifs_fid *, 446 struct cifs_io_parms *, unsigned int *, char **, 447 int *); 448 /* sync write to the server */ 449 int (*sync_write)(const unsigned int, struct cifs_fid *, 450 struct cifs_io_parms *, unsigned int *, struct kvec *, 451 unsigned long); 452 /* open dir, start readdir */ 453 int (*query_dir_first)(const unsigned int, struct cifs_tcon *, 454 const char *, struct cifs_sb_info *, 455 struct cifs_fid *, __u16, 456 struct cifs_search_info *); 457 /* continue readdir */ 458 int (*query_dir_next)(const unsigned int, struct cifs_tcon *, 459 struct cifs_fid *, 460 __u16, struct cifs_search_info *srch_inf); 461 /* close dir */ 462 int (*close_dir)(const unsigned int, struct cifs_tcon *, 463 struct cifs_fid *); 464 /* calculate a size of SMB message */ 465 unsigned int (*calc_smb_size)(void *buf); 466 /* check for STATUS_PENDING and process the response if yes */ 467 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); 468 /* check for STATUS_NETWORK_SESSION_EXPIRED */ 469 bool (*is_session_expired)(char *); 470 /* send oplock break response */ 471 int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, 472 __u16 net_fid, struct cifsInodeInfo *cifs_inode); 473 /* query remote filesystem */ 474 int (*queryfs)(const unsigned int, struct cifs_tcon *, 475 struct cifs_sb_info *, struct kstatfs *); 476 /* send mandatory brlock to the server */ 477 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, 478 __u64, __u32, int, int, bool); 479 /* unlock range of mandatory locks */ 480 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, 481 const unsigned int); 482 /* push brlocks from the cache to the server */ 483 int (*push_mand_locks)(struct cifsFileInfo *); 484 /* get lease key of the inode */ 485 void (*get_lease_key)(struct inode *, struct cifs_fid *); 486 /* set lease key of the inode */ 487 void (*set_lease_key)(struct inode *, struct cifs_fid *); 488 /* generate new lease key */ 489 void (*new_lease_key)(struct cifs_fid *); 490 int (*generate_signingkey)(struct cifs_ses *ses, 491 struct TCP_Server_Info *server); 492 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, 493 bool allocate_crypto); 494 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, 495 struct cifsFileInfo *src_file); 496 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, 497 struct cifsFileInfo *src_file, void __user *); 498 int (*notify)(const unsigned int xid, struct file *pfile, 499 void __user *pbuf, bool return_changes); 500 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, 501 struct cifs_sb_info *, const unsigned char *, 502 char *, unsigned int *); 503 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, 504 struct cifs_sb_info *, const unsigned char *, 505 char *, unsigned int *); 506 /* if we can do cache read operations */ 507 bool (*is_read_op)(__u32); 508 /* set oplock level for the inode */ 509 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, 510 bool *); 511 /* create lease context buffer for CREATE request */ 512 char * (*create_lease_buf)(u8 *lease_key, u8 oplock); 513 /* parse lease context buffer and return oplock/epoch info */ 514 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); 515 ssize_t (*copychunk_range)(const unsigned int, 516 struct cifsFileInfo *src_file, 517 struct cifsFileInfo *target_file, 518 u64 src_off, u64 len, u64 dest_off); 519 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, 520 struct cifsFileInfo *target_file, u64 src_off, u64 len, 521 u64 dest_off); 522 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); 523 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, 524 const unsigned char *, const unsigned char *, char *, 525 size_t, struct cifs_sb_info *); 526 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, 527 const char *, const void *, const __u16, 528 const struct nls_table *, struct cifs_sb_info *); 529 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, 530 const char *, u32 *, u32); 531 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, 532 const struct cifs_fid *, u32 *, u32); 533 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, 534 int); 535 /* writepages retry size */ 536 unsigned int (*wp_retry_size)(struct inode *); 537 /* get mtu credits */ 538 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, 539 unsigned int *, struct cifs_credits *); 540 /* adjust previously taken mtu credits to request size */ 541 int (*adjust_credits)(struct TCP_Server_Info *server, 542 struct cifs_credits *credits, 543 const unsigned int payload_size); 544 /* check if we need to issue closedir */ 545 bool (*dir_needs_close)(struct cifsFileInfo *); 546 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, 547 loff_t); 548 /* init transform request - used for encryption for now */ 549 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, 550 struct smb_rqst *, struct smb_rqst *); 551 int (*is_transform_hdr)(void *buf); 552 int (*receive_transform)(struct TCP_Server_Info *, 553 struct mid_q_entry **, char **, int *); 554 enum securityEnum (*select_sectype)(struct TCP_Server_Info *, 555 enum securityEnum); 556 int (*next_header)(struct TCP_Server_Info *server, char *buf, 557 unsigned int *noff); 558 /* ioctl passthrough for query_info */ 559 int (*ioctl_query_info)(const unsigned int xid, 560 struct cifs_tcon *tcon, 561 struct cifs_sb_info *cifs_sb, 562 __le16 *path, int is_dir, 563 unsigned long p); 564 /* make unix special files (block, char, fifo, socket) */ 565 int (*make_node)(unsigned int xid, 566 struct inode *inode, 567 struct dentry *dentry, 568 struct cifs_tcon *tcon, 569 const char *full_path, 570 umode_t mode, 571 dev_t device_number); 572 /* version specific fiemap implementation */ 573 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, 574 struct fiemap_extent_info *, u64, u64); 575 /* version specific llseek implementation */ 576 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); 577 /* Check for STATUS_IO_TIMEOUT */ 578 bool (*is_status_io_timeout)(char *buf); 579 /* Check for STATUS_NETWORK_NAME_DELETED */ 580 bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); 581 int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, 582 struct kvec *rsp_iov, 583 struct cifs_open_info_data *data); 584 int (*create_reparse_symlink)(const unsigned int xid, 585 struct inode *inode, 586 struct dentry *dentry, 587 struct cifs_tcon *tcon, 588 const char *full_path, 589 const char *symname); 590 }; 591 592 struct smb_version_values { 593 char *version_string; 594 __u16 protocol_id; 595 __u32 req_capabilities; 596 __u32 large_lock_type; 597 __u32 exclusive_lock_type; 598 __u32 shared_lock_type; 599 __u32 unlock_lock_type; 600 size_t header_preamble_size; 601 size_t header_size; 602 size_t max_header_size; 603 size_t read_rsp_size; 604 __le16 lock_cmd; 605 unsigned int cap_unix; 606 unsigned int cap_nt_find; 607 unsigned int cap_large_files; 608 __u16 signing_enabled; 609 __u16 signing_required; 610 size_t create_lease_size; 611 }; 612 613 #define HEADER_SIZE(server) (server->vals->header_size) 614 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) 615 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) 616 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) 617 618 /** 619 * CIFS superblock mount flags (mnt_cifs_flags) to consider when 620 * trying to reuse existing superblock for a new mount 621 */ 622 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ 623 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ 624 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ 625 CIFS_MOUNT_MAP_SFM_CHR | \ 626 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ 627 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ 628 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ 629 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ 630 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ 631 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ 632 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ 633 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ 634 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ 635 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) 636 637 /** 638 * Generic VFS superblock mount flags (s_flags) to consider when 639 * trying to reuse existing superblock for a new mount 640 */ 641 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ 642 SB_NODEV | SB_SYNCHRONOUS) 643 644 struct cifs_mnt_data { 645 struct cifs_sb_info *cifs_sb; 646 struct smb3_fs_context *ctx; 647 int flags; 648 }; 649 650 static inline unsigned int 651 get_rfc1002_length(void *buf) 652 { 653 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 654 } 655 656 static inline void 657 inc_rfc1001_len(void *buf, int count) 658 { 659 be32_add_cpu((__be32 *)buf, count); 660 } 661 662 struct TCP_Server_Info { 663 struct list_head tcp_ses_list; 664 struct list_head smb_ses_list; 665 spinlock_t srv_lock; /* protect anything here that is not protected */ 666 __u64 conn_id; /* connection identifier (useful for debugging) */ 667 int srv_count; /* reference counter */ 668 /* 15 character server name + 0x20 16th byte indicating type = srv */ 669 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 670 struct smb_version_operations *ops; 671 struct smb_version_values *vals; 672 /* updates to tcpStatus protected by cifs_tcp_ses_lock */ 673 enum statusEnum tcpStatus; /* what we think the status is */ 674 char *hostname; /* hostname portion of UNC string */ 675 struct socket *ssocket; 676 struct sockaddr_storage dstaddr; 677 struct sockaddr_storage srcaddr; /* locally bind to this IP */ 678 #ifdef CONFIG_NET_NS 679 struct net *net; 680 #endif 681 wait_queue_head_t response_q; 682 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ 683 spinlock_t mid_lock; /* protect mid queue and it's entries */ 684 struct list_head pending_mid_q; 685 bool noblocksnd; /* use blocking sendmsg */ 686 bool noautotune; /* do not autotune send buf sizes */ 687 bool nosharesock; 688 bool tcp_nodelay; 689 bool terminate; 690 unsigned int credits; /* send no more requests at once */ 691 unsigned int max_credits; /* can override large 32000 default at mnt */ 692 unsigned int in_flight; /* number of requests on the wire to server */ 693 unsigned int max_in_flight; /* max number of requests that were on wire */ 694 spinlock_t req_lock; /* protect the two values above */ 695 struct mutex _srv_mutex; 696 unsigned int nofs_flag; 697 struct task_struct *tsk; 698 char server_GUID[16]; 699 __u16 sec_mode; 700 bool sign; /* is signing enabled on this connection? */ 701 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ 702 bool session_estab; /* mark when very first sess is established */ 703 int echo_credits; /* echo reserved slots */ 704 int oplock_credits; /* oplock break reserved slots */ 705 bool echoes:1; /* enable echoes */ 706 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ 707 u16 dialect; /* dialect index that server chose */ 708 bool oplocks:1; /* enable oplocks */ 709 unsigned int maxReq; /* Clients should submit no more */ 710 /* than maxReq distinct unanswered SMBs to the server when using */ 711 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ 712 unsigned int maxBuf; /* maxBuf specifies the maximum */ 713 /* message size the server can send or receive for non-raw SMBs */ 714 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ 715 /* when socket is setup (and during reconnect) before NegProt sent */ 716 unsigned int max_rw; /* maxRw specifies the maximum */ 717 /* message size the server can send or receive for */ 718 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ 719 unsigned int capabilities; /* selective disabling of caps by smb sess */ 720 int timeAdj; /* Adjust for difference in server time zone in sec */ 721 __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ 722 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 723 /* 16th byte of RFC1001 workstation name is always null */ 724 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 725 __u32 sequence_number; /* for signing, protected by srv_mutex */ 726 __u32 reconnect_instance; /* incremented on each reconnect */ 727 struct session_key session_key; 728 unsigned long lstrp; /* when we got last response from this server */ 729 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 730 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ 731 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ 732 char negflavor; /* NEGOTIATE response flavor */ 733 /* extended security flavors that server supports */ 734 bool sec_ntlmssp; /* supports NTLMSSP */ 735 bool sec_kerberosu2u; /* supports U2U Kerberos */ 736 bool sec_kerberos; /* supports plain Kerberos */ 737 bool sec_mskerberos; /* supports legacy MS Kerberos */ 738 bool large_buf; /* is current buffer large? */ 739 /* use SMBD connection instead of socket */ 740 bool rdma; 741 /* point to the SMBD connection if RDMA is used instead of socket */ 742 struct smbd_connection *smbd_conn; 743 struct delayed_work echo; /* echo ping workqueue job */ 744 char *smallbuf; /* pointer to current "small" buffer */ 745 char *bigbuf; /* pointer to current "big" buffer */ 746 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ 747 unsigned int pdu_size; 748 unsigned int total_read; /* total amount of data read in this pass */ 749 atomic_t in_send; /* requests trying to send */ 750 atomic_t num_waiters; /* blocked waiting to get in sendrecv */ 751 #ifdef CONFIG_CIFS_STATS2 752 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ 753 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ 754 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ 755 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; 756 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; 757 #endif /* STATS2 */ 758 unsigned int max_read; 759 unsigned int max_write; 760 unsigned int min_offload; 761 unsigned int retrans; 762 __le16 compress_algorithm; 763 __u16 signing_algorithm; 764 __le16 cipher_type; 765 /* save initital negprot hash */ 766 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 767 bool signing_negotiated; /* true if valid signing context rcvd from server */ 768 bool posix_ext_supported; 769 struct delayed_work reconnect; /* reconnect workqueue job */ 770 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ 771 unsigned long echo_interval; 772 773 /* 774 * Number of targets available for reconnect. The more targets 775 * the more tasks have to wait to let the demultiplex thread 776 * reconnect. 777 */ 778 int nr_targets; 779 bool noblockcnt; /* use non-blocking connect() */ 780 781 /* 782 * If this is a session channel, 783 * primary_server holds the ref-counted 784 * pointer to primary channel connection for the session. 785 */ 786 #define SERVER_IS_CHAN(server) (!!(server)->primary_server) 787 struct TCP_Server_Info *primary_server; 788 __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ 789 790 #ifdef CONFIG_CIFS_SWN_UPCALL 791 bool use_swn_dstaddr; 792 struct sockaddr_storage swn_dstaddr; 793 #endif 794 struct mutex refpath_lock; /* protects leaf_fullpath */ 795 /* 796 * leaf_fullpath: Canonical DFS referral path related to this 797 * connection. 798 * It is used in DFS cache refresher, reconnect and may 799 * change due to nested DFS links. 800 * 801 * Protected by @refpath_lock and @srv_lock. The @refpath_lock is 802 * mostly used for not requiring a copy of @leaf_fullpath when getting 803 * cached or new DFS referrals (which might also sleep during I/O). 804 * While @srv_lock is held for making string and NULL comparions against 805 * both fields as in mount(2) and cache refresh. 806 * 807 * format: \\HOST\SHARE[\OPTIONAL PATH] 808 */ 809 char *leaf_fullpath; 810 }; 811 812 static inline bool is_smb1(struct TCP_Server_Info *server) 813 { 814 return HEADER_PREAMBLE_SIZE(server) != 0; 815 } 816 817 static inline void cifs_server_lock(struct TCP_Server_Info *server) 818 { 819 unsigned int nofs_flag = memalloc_nofs_save(); 820 821 mutex_lock(&server->_srv_mutex); 822 server->nofs_flag = nofs_flag; 823 } 824 825 static inline void cifs_server_unlock(struct TCP_Server_Info *server) 826 { 827 unsigned int nofs_flag = server->nofs_flag; 828 829 mutex_unlock(&server->_srv_mutex); 830 memalloc_nofs_restore(nofs_flag); 831 } 832 833 struct cifs_credits { 834 unsigned int value; 835 unsigned int instance; 836 }; 837 838 static inline unsigned int 839 in_flight(struct TCP_Server_Info *server) 840 { 841 unsigned int num; 842 843 spin_lock(&server->req_lock); 844 num = server->in_flight; 845 spin_unlock(&server->req_lock); 846 return num; 847 } 848 849 static inline bool 850 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) 851 { 852 int num; 853 854 spin_lock(&server->req_lock); 855 num = *credits; 856 spin_unlock(&server->req_lock); 857 return num >= num_credits; 858 } 859 860 static inline void 861 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, 862 const int optype) 863 { 864 server->ops->add_credits(server, credits, optype); 865 } 866 867 static inline void 868 add_credits_and_wake_if(struct TCP_Server_Info *server, 869 const struct cifs_credits *credits, const int optype) 870 { 871 if (credits->value) { 872 server->ops->add_credits(server, credits, optype); 873 wake_up(&server->request_q); 874 } 875 } 876 877 static inline void 878 set_credits(struct TCP_Server_Info *server, const int val) 879 { 880 server->ops->set_credits(server, val); 881 } 882 883 static inline int 884 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, 885 const unsigned int payload_size) 886 { 887 return server->ops->adjust_credits ? 888 server->ops->adjust_credits(server, credits, payload_size) : 0; 889 } 890 891 static inline __le64 892 get_next_mid64(struct TCP_Server_Info *server) 893 { 894 return cpu_to_le64(server->ops->get_next_mid(server)); 895 } 896 897 static inline __le16 898 get_next_mid(struct TCP_Server_Info *server) 899 { 900 __u16 mid = server->ops->get_next_mid(server); 901 /* 902 * The value in the SMB header should be little endian for easy 903 * on-the-wire decoding. 904 */ 905 return cpu_to_le16(mid); 906 } 907 908 static inline void 909 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 910 { 911 if (server->ops->revert_current_mid) 912 server->ops->revert_current_mid(server, val); 913 } 914 915 static inline void 916 revert_current_mid_from_hdr(struct TCP_Server_Info *server, 917 const struct smb2_hdr *shdr) 918 { 919 unsigned int num = le16_to_cpu(shdr->CreditCharge); 920 921 return revert_current_mid(server, num > 0 ? num : 1); 922 } 923 924 static inline __u16 925 get_mid(const struct smb_hdr *smb) 926 { 927 return le16_to_cpu(smb->Mid); 928 } 929 930 static inline bool 931 compare_mid(__u16 mid, const struct smb_hdr *smb) 932 { 933 return mid == le16_to_cpu(smb->Mid); 934 } 935 936 /* 937 * When the server supports very large reads and writes via POSIX extensions, 938 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not 939 * including the RFC1001 length. 940 * 941 * Note that this might make for "interesting" allocation problems during 942 * writeback however as we have to allocate an array of pointers for the 943 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. 944 * 945 * For reads, there is a similar problem as we need to allocate an array 946 * of kvecs to handle the receive, though that should only need to be done 947 * once. 948 */ 949 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) 950 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) 951 952 /* 953 * When the server doesn't allow large posix writes, only allow a rsize/wsize 954 * of 2^17-1 minus the size of the call header. That allows for a read or 955 * write up to the maximum size described by RFC1002. 956 */ 957 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) 958 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) 959 960 #define CIFS_DEFAULT_IOSIZE (1024 * 1024) 961 962 /* 963 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to 964 * those values when posix extensions aren't in force. In actuality here, we 965 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem 966 * to be ok with the extra byte even though Windows doesn't send writes that 967 * are that large. 968 * 969 * Citation: 970 * 971 * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx 972 */ 973 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) 974 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) 975 976 /* 977 * Macros to allow the TCP_Server_Info->net field and related code to drop out 978 * when CONFIG_NET_NS isn't set. 979 */ 980 981 #ifdef CONFIG_NET_NS 982 983 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 984 { 985 return srv->net; 986 } 987 988 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 989 { 990 srv->net = net; 991 } 992 993 #else 994 995 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) 996 { 997 return &init_net; 998 } 999 1000 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) 1001 { 1002 } 1003 1004 #endif 1005 1006 struct cifs_server_iface { 1007 struct list_head iface_head; 1008 struct kref refcount; 1009 size_t speed; 1010 size_t weight_fulfilled; 1011 unsigned int num_channels; 1012 unsigned int rdma_capable : 1; 1013 unsigned int rss_capable : 1; 1014 unsigned int is_active : 1; /* unset if non existent */ 1015 struct sockaddr_storage sockaddr; 1016 }; 1017 1018 /* release iface when last ref is dropped */ 1019 static inline void 1020 release_iface(struct kref *ref) 1021 { 1022 struct cifs_server_iface *iface = container_of(ref, 1023 struct cifs_server_iface, 1024 refcount); 1025 kfree(iface); 1026 } 1027 1028 struct cifs_chan { 1029 unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ 1030 struct TCP_Server_Info *server; 1031 struct cifs_server_iface *iface; /* interface in use */ 1032 __u8 signkey[SMB3_SIGN_KEY_SIZE]; 1033 }; 1034 1035 #define CIFS_SES_FLAG_SCALE_CHANNELS (0x1) 1036 1037 /* 1038 * Session structure. One of these for each uid session with a particular host 1039 */ 1040 struct cifs_ses { 1041 struct list_head smb_ses_list; 1042 struct list_head rlist; /* reconnect list */ 1043 struct list_head tcon_list; 1044 struct cifs_tcon *tcon_ipc; 1045 spinlock_t ses_lock; /* protect anything here that is not protected */ 1046 struct mutex session_mutex; 1047 struct TCP_Server_Info *server; /* pointer to server info */ 1048 int ses_count; /* reference counter */ 1049 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1050 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1051 char *serverOS; /* name of operating system underlying server */ 1052 char *serverNOS; /* name of network operating system of server */ 1053 char *serverDomain; /* security realm of server */ 1054 __u64 Suid; /* remote smb uid */ 1055 kuid_t linux_uid; /* overriding owner of files on the mount */ 1056 kuid_t cred_uid; /* owner of credentials */ 1057 unsigned int capabilities; 1058 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1059 char *user_name; /* must not be null except during init of sess 1060 and after mount option parsing we fill it */ 1061 char *domainName; 1062 char *password; 1063 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1064 struct session_key auth_key; 1065 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1066 enum securityEnum sectype; /* what security flavor was specified? */ 1067 bool sign; /* is signing required? */ 1068 bool domainAuto:1; 1069 unsigned int flags; 1070 __u16 session_flags; 1071 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1072 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1073 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1074 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1075 1076 /* 1077 * Network interfaces available on the server this session is 1078 * connected to. 1079 * 1080 * Other channels can be opened by connecting and binding this 1081 * session to interfaces from this list. 1082 * 1083 * iface_lock should be taken when accessing any of these fields 1084 */ 1085 spinlock_t iface_lock; 1086 /* ========= begin: protected by iface_lock ======== */ 1087 struct list_head iface_list; 1088 size_t iface_count; 1089 unsigned long iface_last_update; /* jiffies */ 1090 /* ========= end: protected by iface_lock ======== */ 1091 1092 spinlock_t chan_lock; 1093 /* ========= begin: protected by chan_lock ======== */ 1094 #define CIFS_MAX_CHANNELS 16 1095 #define CIFS_INVAL_CHAN_INDEX (-1) 1096 #define CIFS_ALL_CHANNELS_SET(ses) \ 1097 ((1UL << (ses)->chan_count) - 1) 1098 #define CIFS_ALL_CHANS_GOOD(ses) \ 1099 (!(ses)->chans_need_reconnect) 1100 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1101 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1102 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1103 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1104 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1105 test_bit((index), &(ses)->chans_need_reconnect) 1106 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1107 ((ses)->chans[(index)].in_reconnect) 1108 1109 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1110 size_t chan_count; 1111 size_t chan_max; 1112 atomic_t chan_seq; /* round robin state */ 1113 1114 /* 1115 * chans_need_reconnect is a bitmap indicating which of the channels 1116 * under this smb session needs to be reconnected. 1117 * If not multichannel session, only one bit will be used. 1118 * 1119 * We will ask for sess and tcon reconnection only if all the 1120 * channels are marked for needing reconnection. This will 1121 * enable the sessions on top to continue to live till any 1122 * of the channels below are active. 1123 */ 1124 unsigned long chans_need_reconnect; 1125 /* ========= end: protected by chan_lock ======== */ 1126 struct cifs_ses *dfs_root_ses; 1127 struct nls_table *local_nls; 1128 }; 1129 1130 static inline bool 1131 cap_unix(struct cifs_ses *ses) 1132 { 1133 return ses->server->vals->cap_unix & ses->capabilities; 1134 } 1135 1136 /* 1137 * common struct for holding inode info when searching for or updating an 1138 * inode with new info 1139 */ 1140 1141 #define CIFS_FATTR_JUNCTION 0x1 1142 #define CIFS_FATTR_DELETE_PENDING 0x2 1143 #define CIFS_FATTR_NEED_REVAL 0x4 1144 #define CIFS_FATTR_INO_COLLISION 0x8 1145 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1146 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1147 1148 struct cifs_fattr { 1149 u32 cf_flags; 1150 u32 cf_cifsattrs; 1151 u64 cf_uniqueid; 1152 u64 cf_eof; 1153 u64 cf_bytes; 1154 u64 cf_createtime; 1155 kuid_t cf_uid; 1156 kgid_t cf_gid; 1157 umode_t cf_mode; 1158 dev_t cf_rdev; 1159 unsigned int cf_nlink; 1160 unsigned int cf_dtype; 1161 struct timespec64 cf_atime; 1162 struct timespec64 cf_mtime; 1163 struct timespec64 cf_ctime; 1164 u32 cf_cifstag; 1165 char *cf_symlink_target; 1166 }; 1167 1168 /* 1169 * there is one of these for each connection to a resource on a particular 1170 * session 1171 */ 1172 struct cifs_tcon { 1173 struct list_head tcon_list; 1174 int tc_count; 1175 struct list_head rlist; /* reconnect list */ 1176 spinlock_t tc_lock; /* protect anything here that is not protected */ 1177 atomic_t num_local_opens; /* num of all opens including disconnected */ 1178 atomic_t num_remote_opens; /* num of all network opens on server */ 1179 struct list_head openFileList; 1180 spinlock_t open_file_lock; /* protects list above */ 1181 struct cifs_ses *ses; /* pointer to session associated with */ 1182 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1183 char *nativeFileSystem; 1184 char *password; /* for share-level security */ 1185 __u32 tid; /* The 4 byte tree id */ 1186 __u16 Flags; /* optional support bits */ 1187 enum tid_status_enum status; 1188 atomic_t num_smbs_sent; 1189 union { 1190 struct { 1191 atomic_t num_writes; 1192 atomic_t num_reads; 1193 atomic_t num_flushes; 1194 atomic_t num_oplock_brks; 1195 atomic_t num_opens; 1196 atomic_t num_closes; 1197 atomic_t num_deletes; 1198 atomic_t num_mkdirs; 1199 atomic_t num_posixopens; 1200 atomic_t num_posixmkdirs; 1201 atomic_t num_rmdirs; 1202 atomic_t num_renames; 1203 atomic_t num_t2renames; 1204 atomic_t num_ffirst; 1205 atomic_t num_fnext; 1206 atomic_t num_fclose; 1207 atomic_t num_hardlinks; 1208 atomic_t num_symlinks; 1209 atomic_t num_locks; 1210 atomic_t num_acl_get; 1211 atomic_t num_acl_set; 1212 } cifs_stats; 1213 struct { 1214 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1215 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1216 } smb2_stats; 1217 } stats; 1218 __u64 bytes_read; 1219 __u64 bytes_written; 1220 spinlock_t stat_lock; /* protects the two fields above */ 1221 time64_t stats_from_time; 1222 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1223 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1224 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1225 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1226 bool pipe:1; /* set if connection to pipe share */ 1227 bool print:1; /* set if connection to printer share */ 1228 bool retry:1; 1229 bool nocase:1; 1230 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1231 bool nodelete:1; 1232 bool seal:1; /* transport encryption for this mounted share */ 1233 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1234 for this mount even if server would support */ 1235 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1236 bool local_lease:1; /* check leases (only) on local system not remote */ 1237 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1238 bool broken_sparse_sup; /* if server or share does not support sparse */ 1239 bool need_reconnect:1; /* connection reset, tid now invalid */ 1240 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1241 bool use_resilient:1; /* use resilient instead of durable handles */ 1242 bool use_persistent:1; /* use persistent instead of durable handles */ 1243 bool no_lease:1; /* Do not request leases on files or directories */ 1244 bool use_witness:1; /* use witness protocol */ 1245 __le32 capabilities; 1246 __u32 share_flags; 1247 __u32 maximal_access; 1248 __u32 vol_serial_number; 1249 __le64 vol_create_time; 1250 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1251 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1252 __u32 ss_flags; /* sector size flags */ 1253 __u32 perf_sector_size; /* best sector size for perf */ 1254 __u32 max_chunks; 1255 __u32 max_bytes_chunk; 1256 __u32 max_bytes_copy; 1257 __u32 max_cached_dirs; 1258 #ifdef CONFIG_CIFS_FSCACHE 1259 u64 resource_id; /* server resource id */ 1260 struct fscache_volume *fscache; /* cookie for share */ 1261 #endif 1262 struct list_head pending_opens; /* list of incomplete opens */ 1263 struct cached_fids *cfids; 1264 /* BB add field for back pointer to sb struct(s)? */ 1265 #ifdef CONFIG_CIFS_DFS_UPCALL 1266 struct list_head dfs_ses_list; 1267 struct delayed_work dfs_cache_work; 1268 #endif 1269 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1270 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1271 }; 1272 1273 /* 1274 * This is a refcounted and timestamped container for a tcon pointer. The 1275 * container holds a tcon reference. It is considered safe to free one of 1276 * these when the tl_count goes to 0. The tl_time is the time of the last 1277 * "get" on the container. 1278 */ 1279 struct tcon_link { 1280 struct rb_node tl_rbnode; 1281 kuid_t tl_uid; 1282 unsigned long tl_flags; 1283 #define TCON_LINK_MASTER 0 1284 #define TCON_LINK_PENDING 1 1285 #define TCON_LINK_IN_TREE 2 1286 unsigned long tl_time; 1287 atomic_t tl_count; 1288 struct cifs_tcon *tl_tcon; 1289 }; 1290 1291 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1292 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1293 1294 static inline struct cifs_tcon * 1295 tlink_tcon(struct tcon_link *tlink) 1296 { 1297 return tlink->tl_tcon; 1298 } 1299 1300 static inline struct tcon_link * 1301 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1302 { 1303 return cifs_sb->master_tlink; 1304 } 1305 1306 extern void cifs_put_tlink(struct tcon_link *tlink); 1307 1308 static inline struct tcon_link * 1309 cifs_get_tlink(struct tcon_link *tlink) 1310 { 1311 if (tlink && !IS_ERR(tlink)) 1312 atomic_inc(&tlink->tl_count); 1313 return tlink; 1314 } 1315 1316 /* This function is always expected to succeed */ 1317 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1318 1319 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1320 1321 struct cifs_pending_open { 1322 struct list_head olist; 1323 struct tcon_link *tlink; 1324 __u8 lease_key[16]; 1325 __u32 oplock; 1326 }; 1327 1328 struct cifs_deferred_close { 1329 struct list_head dlist; 1330 struct tcon_link *tlink; 1331 __u16 netfid; 1332 __u64 persistent_fid; 1333 __u64 volatile_fid; 1334 }; 1335 1336 /* 1337 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1338 * This is used to track byte stream locks on the file 1339 */ 1340 struct cifsLockInfo { 1341 struct list_head llist; /* pointer to next cifsLockInfo */ 1342 struct list_head blist; /* pointer to locks blocked on this */ 1343 wait_queue_head_t block_q; 1344 __u64 offset; 1345 __u64 length; 1346 __u32 pid; 1347 __u16 type; 1348 __u16 flags; 1349 }; 1350 1351 /* 1352 * One of these for each open instance of a file 1353 */ 1354 struct cifs_search_info { 1355 loff_t index_of_last_entry; 1356 __u16 entries_in_buffer; 1357 __u16 info_level; 1358 __u32 resume_key; 1359 char *ntwrk_buf_start; 1360 char *srch_entries_start; 1361 char *last_entry; 1362 const char *presume_name; 1363 unsigned int resume_name_len; 1364 bool endOfSearch:1; 1365 bool emptyDir:1; 1366 bool unicode:1; 1367 bool smallBuf:1; /* so we know which buf_release function to call */ 1368 }; 1369 1370 #define ACL_NO_MODE ((umode_t)(-1)) 1371 struct cifs_open_parms { 1372 struct cifs_tcon *tcon; 1373 struct cifs_sb_info *cifs_sb; 1374 int disposition; 1375 int desired_access; 1376 int create_options; 1377 const char *path; 1378 struct cifs_fid *fid; 1379 umode_t mode; 1380 bool reconnect:1; 1381 bool replay:1; /* indicates that this open is for a replay */ 1382 }; 1383 1384 struct cifs_fid { 1385 __u16 netfid; 1386 __u64 persistent_fid; /* persist file id for smb2 */ 1387 __u64 volatile_fid; /* volatile file id for smb2 */ 1388 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1389 __u8 create_guid[16]; 1390 __u32 access; 1391 struct cifs_pending_open *pending_open; 1392 unsigned int epoch; 1393 #ifdef CONFIG_CIFS_DEBUG2 1394 __u64 mid; 1395 #endif /* CIFS_DEBUG2 */ 1396 bool purge_cache; 1397 }; 1398 1399 struct cifs_fid_locks { 1400 struct list_head llist; 1401 struct cifsFileInfo *cfile; /* fid that owns locks */ 1402 struct list_head locks; /* locks held by fid above */ 1403 }; 1404 1405 struct cifsFileInfo { 1406 /* following two lists are protected by tcon->open_file_lock */ 1407 struct list_head tlist; /* pointer to next fid owned by tcon */ 1408 struct list_head flist; /* next fid (file instance) for this inode */ 1409 /* lock list below protected by cifsi->lock_sem */ 1410 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1411 kuid_t uid; /* allows finding which FileInfo structure */ 1412 __u32 pid; /* process id who opened file */ 1413 struct cifs_fid fid; /* file id from remote */ 1414 struct list_head rlist; /* reconnect list */ 1415 /* BB add lock scope info here if needed */ 1416 /* lock scope id (0 if none) */ 1417 struct dentry *dentry; 1418 struct tcon_link *tlink; 1419 unsigned int f_flags; 1420 bool invalidHandle:1; /* file closed via session abend */ 1421 bool swapfile:1; 1422 bool oplock_break_cancelled:1; 1423 unsigned int oplock_epoch; /* epoch from the lease break */ 1424 __u32 oplock_level; /* oplock/lease level from the lease break */ 1425 int count; 1426 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1427 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1428 struct cifs_search_info srch_inf; 1429 struct work_struct oplock_break; /* work for oplock breaks */ 1430 struct work_struct put; /* work for the final part of _put */ 1431 struct delayed_work deferred; 1432 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1433 char *symlink_target; 1434 }; 1435 1436 struct cifs_io_parms { 1437 __u16 netfid; 1438 __u64 persistent_fid; /* persist file id for smb2 */ 1439 __u64 volatile_fid; /* volatile file id for smb2 */ 1440 __u32 pid; 1441 __u64 offset; 1442 unsigned int length; 1443 struct cifs_tcon *tcon; 1444 struct TCP_Server_Info *server; 1445 }; 1446 1447 struct cifs_aio_ctx { 1448 struct kref refcount; 1449 struct list_head list; 1450 struct mutex aio_mutex; 1451 struct completion done; 1452 struct iov_iter iter; 1453 struct kiocb *iocb; 1454 struct cifsFileInfo *cfile; 1455 struct bio_vec *bv; 1456 loff_t pos; 1457 unsigned int nr_pinned_pages; 1458 ssize_t rc; 1459 unsigned int len; 1460 unsigned int total_len; 1461 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1462 bool should_dirty; 1463 /* 1464 * Indicates if this aio_ctx is for direct_io, 1465 * If yes, iter is a copy of the user passed iov_iter 1466 */ 1467 bool direct_io; 1468 }; 1469 1470 /* asynchronous read support */ 1471 struct cifs_readdata { 1472 struct kref refcount; 1473 struct list_head list; 1474 struct completion done; 1475 struct cifsFileInfo *cfile; 1476 struct address_space *mapping; 1477 struct cifs_aio_ctx *ctx; 1478 __u64 offset; 1479 ssize_t got_bytes; 1480 unsigned int bytes; 1481 pid_t pid; 1482 int result; 1483 struct work_struct work; 1484 struct iov_iter iter; 1485 struct kvec iov[2]; 1486 struct TCP_Server_Info *server; 1487 #ifdef CONFIG_CIFS_SMB_DIRECT 1488 struct smbd_mr *mr; 1489 #endif 1490 struct cifs_credits credits; 1491 }; 1492 1493 /* asynchronous write support */ 1494 struct cifs_writedata { 1495 struct kref refcount; 1496 struct list_head list; 1497 struct completion done; 1498 enum writeback_sync_modes sync_mode; 1499 struct work_struct work; 1500 struct cifsFileInfo *cfile; 1501 struct cifs_aio_ctx *ctx; 1502 struct iov_iter iter; 1503 struct bio_vec *bv; 1504 __u64 offset; 1505 pid_t pid; 1506 unsigned int bytes; 1507 int result; 1508 struct TCP_Server_Info *server; 1509 #ifdef CONFIG_CIFS_SMB_DIRECT 1510 struct smbd_mr *mr; 1511 #endif 1512 struct cifs_credits credits; 1513 bool replay; 1514 }; 1515 1516 /* 1517 * Take a reference on the file private data. Must be called with 1518 * cfile->file_info_lock held. 1519 */ 1520 static inline void 1521 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1522 { 1523 ++cifs_file->count; 1524 } 1525 1526 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1527 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1528 bool offload); 1529 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1530 1531 #define CIFS_CACHE_READ_FLG 1 1532 #define CIFS_CACHE_HANDLE_FLG 2 1533 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1534 #define CIFS_CACHE_WRITE_FLG 4 1535 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1536 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1537 1538 #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)) 1539 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1540 #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)) 1541 1542 /* 1543 * One of these for each file inode 1544 */ 1545 1546 struct cifsInodeInfo { 1547 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1548 bool can_cache_brlcks; 1549 struct list_head llist; /* locks helb by this inode */ 1550 /* 1551 * NOTE: Some code paths call down_read(lock_sem) twice, so 1552 * we must always use cifs_down_write() instead of down_write() 1553 * for this semaphore to avoid deadlocks. 1554 */ 1555 struct rw_semaphore lock_sem; /* protect the fields above */ 1556 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1557 struct list_head openFileList; 1558 spinlock_t open_file_lock; /* protects openFileList */ 1559 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1560 unsigned int oplock; /* oplock/lease level we have */ 1561 unsigned int epoch; /* used to track lease state changes */ 1562 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1563 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1564 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1565 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1566 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1567 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1568 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1569 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1570 unsigned long flags; 1571 spinlock_t writers_lock; 1572 unsigned int writers; /* Number of writers on this inode */ 1573 unsigned long time; /* jiffies of last update of inode */ 1574 u64 uniqueid; /* server inode number */ 1575 u64 createtime; /* creation time on server */ 1576 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1577 struct list_head deferred_closes; /* list of deferred closes */ 1578 spinlock_t deferred_lock; /* protection on deferred list */ 1579 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1580 char *symlink_target; 1581 __u32 reparse_tag; 1582 }; 1583 1584 static inline struct cifsInodeInfo * 1585 CIFS_I(struct inode *inode) 1586 { 1587 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1588 } 1589 1590 static inline struct cifs_sb_info * 1591 CIFS_SB(struct super_block *sb) 1592 { 1593 return sb->s_fs_info; 1594 } 1595 1596 static inline struct cifs_sb_info * 1597 CIFS_FILE_SB(struct file *file) 1598 { 1599 return CIFS_SB(file_inode(file)->i_sb); 1600 } 1601 1602 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1603 { 1604 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1605 return '/'; 1606 else 1607 return '\\'; 1608 } 1609 1610 static inline void 1611 convert_delimiter(char *path, char delim) 1612 { 1613 char old_delim, *pos; 1614 1615 if (delim == '/') 1616 old_delim = '\\'; 1617 else 1618 old_delim = '/'; 1619 1620 pos = path; 1621 while ((pos = strchr(pos, old_delim))) 1622 *pos = delim; 1623 } 1624 1625 #define cifs_stats_inc atomic_inc 1626 1627 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1628 unsigned int bytes) 1629 { 1630 if (bytes) { 1631 spin_lock(&tcon->stat_lock); 1632 tcon->bytes_written += bytes; 1633 spin_unlock(&tcon->stat_lock); 1634 } 1635 } 1636 1637 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1638 unsigned int bytes) 1639 { 1640 spin_lock(&tcon->stat_lock); 1641 tcon->bytes_read += bytes; 1642 spin_unlock(&tcon->stat_lock); 1643 } 1644 1645 1646 /* 1647 * This is the prototype for the mid receive function. This function is for 1648 * receiving the rest of the SMB frame, starting with the WordCount (which is 1649 * just after the MID in struct smb_hdr). Note: 1650 * 1651 * - This will be called by cifsd, with no locks held. 1652 * - The mid will still be on the pending_mid_q. 1653 * - mid->resp_buf will point to the current buffer. 1654 * 1655 * Returns zero on a successful receive, or an error. The receive state in 1656 * the TCP_Server_Info will also be updated. 1657 */ 1658 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1659 struct mid_q_entry *mid); 1660 1661 /* 1662 * This is the prototype for the mid callback function. This is called once the 1663 * mid has been received off of the socket. When creating one, take special 1664 * care to avoid deadlocks. Things to bear in mind: 1665 * 1666 * - it will be called by cifsd, with no locks held 1667 * - the mid will be removed from any lists 1668 */ 1669 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1670 1671 /* 1672 * This is the protopyte for mid handle function. This is called once the mid 1673 * has been recognized after decryption of the message. 1674 */ 1675 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1676 struct mid_q_entry *mid); 1677 1678 /* one of these for every pending CIFS request to the server */ 1679 struct mid_q_entry { 1680 struct list_head qhead; /* mids waiting on reply from this server */ 1681 struct kref refcount; 1682 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1683 __u64 mid; /* multiplex id */ 1684 __u16 credits; /* number of credits consumed by this mid */ 1685 __u16 credits_received; /* number of credits from the response */ 1686 __u32 pid; /* process id */ 1687 __u32 sequence_number; /* for CIFS signing */ 1688 unsigned long when_alloc; /* when mid was created */ 1689 #ifdef CONFIG_CIFS_STATS2 1690 unsigned long when_sent; /* time when smb send finished */ 1691 unsigned long when_received; /* when demux complete (taken off wire) */ 1692 #endif 1693 mid_receive_t *receive; /* call receive callback */ 1694 mid_callback_t *callback; /* call completion callback */ 1695 mid_handle_t *handle; /* call handle mid callback */ 1696 void *callback_data; /* general purpose pointer for callback */ 1697 struct task_struct *creator; 1698 void *resp_buf; /* pointer to received SMB header */ 1699 unsigned int resp_buf_size; 1700 int mid_state; /* wish this were enum but can not pass to wait_event */ 1701 unsigned int mid_flags; 1702 __le16 command; /* smb command code */ 1703 unsigned int optype; /* operation type */ 1704 bool large_buf:1; /* if valid response, is pointer to large buf */ 1705 bool multiRsp:1; /* multiple trans2 responses for one request */ 1706 bool multiEnd:1; /* both received */ 1707 bool decrypted:1; /* decrypted entry */ 1708 }; 1709 1710 struct close_cancelled_open { 1711 struct cifs_fid fid; 1712 struct cifs_tcon *tcon; 1713 struct work_struct work; 1714 __u64 mid; 1715 __u16 cmd; 1716 }; 1717 1718 /* Make code in transport.c a little cleaner by moving 1719 update of optional stats into function below */ 1720 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1721 { 1722 atomic_inc(&server->in_send); 1723 } 1724 1725 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1726 { 1727 atomic_dec(&server->in_send); 1728 } 1729 1730 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1731 { 1732 atomic_inc(&server->num_waiters); 1733 } 1734 1735 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1736 { 1737 atomic_dec(&server->num_waiters); 1738 } 1739 1740 #ifdef CONFIG_CIFS_STATS2 1741 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1742 { 1743 mid->when_sent = jiffies; 1744 } 1745 #else 1746 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1747 { 1748 } 1749 #endif 1750 1751 /* for pending dnotify requests */ 1752 struct dir_notify_req { 1753 struct list_head lhead; 1754 __le16 Pid; 1755 __le16 PidHigh; 1756 __u16 Mid; 1757 __u16 Tid; 1758 __u16 Uid; 1759 __u16 netfid; 1760 __u32 filter; /* CompletionFilter (for multishot) */ 1761 int multishot; 1762 struct file *pfile; 1763 }; 1764 1765 struct dfs_info3_param { 1766 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1767 int path_consumed; 1768 int server_type; 1769 int ref_flag; 1770 char *path_name; 1771 char *node_name; 1772 int ttl; 1773 }; 1774 1775 struct file_list { 1776 struct list_head list; 1777 struct cifsFileInfo *cfile; 1778 }; 1779 1780 struct cifs_mount_ctx { 1781 struct cifs_sb_info *cifs_sb; 1782 struct smb3_fs_context *fs_ctx; 1783 unsigned int xid; 1784 struct TCP_Server_Info *server; 1785 struct cifs_ses *ses; 1786 struct cifs_tcon *tcon; 1787 struct list_head dfs_ses_list; 1788 }; 1789 1790 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1791 { 1792 kfree(param->path_name); 1793 kfree(param->node_name); 1794 } 1795 1796 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1797 { 1798 if (param) 1799 __free_dfs_info_param(param); 1800 } 1801 1802 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1803 { 1804 if (param) { 1805 __free_dfs_info_param(param); 1806 memset(param, 0, sizeof(*param)); 1807 } 1808 } 1809 1810 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1811 int number_of_items) 1812 { 1813 int i; 1814 1815 if ((number_of_items == 0) || (param == NULL)) 1816 return; 1817 for (i = 0; i < number_of_items; i++) { 1818 kfree(param[i].path_name); 1819 kfree(param[i].node_name); 1820 } 1821 kfree(param); 1822 } 1823 1824 static inline bool is_interrupt_error(int error) 1825 { 1826 switch (error) { 1827 case -EINTR: 1828 case -ERESTARTSYS: 1829 case -ERESTARTNOHAND: 1830 case -ERESTARTNOINTR: 1831 return true; 1832 } 1833 return false; 1834 } 1835 1836 static inline bool is_retryable_error(int error) 1837 { 1838 if (is_interrupt_error(error) || error == -EAGAIN) 1839 return true; 1840 return false; 1841 } 1842 1843 static inline bool is_replayable_error(int error) 1844 { 1845 if (error == -EAGAIN || error == -ECONNABORTED) 1846 return true; 1847 return false; 1848 } 1849 1850 1851 /* cifs_get_writable_file() flags */ 1852 #define FIND_WR_ANY 0 1853 #define FIND_WR_FSUID_ONLY 1 1854 #define FIND_WR_WITH_DELETE 2 1855 1856 #define MID_FREE 0 1857 #define MID_REQUEST_ALLOCATED 1 1858 #define MID_REQUEST_SUBMITTED 2 1859 #define MID_RESPONSE_RECEIVED 4 1860 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1861 #define MID_RESPONSE_MALFORMED 0x10 1862 #define MID_SHUTDOWN 0x20 1863 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1864 1865 /* Flags */ 1866 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1867 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1868 1869 /* Types of response buffer returned from SendReceive2 */ 1870 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1871 #define CIFS_SMALL_BUFFER 1 1872 #define CIFS_LARGE_BUFFER 2 1873 #define CIFS_IOVEC 4 /* array of response buffers */ 1874 1875 /* Type of Request to SendReceive2 */ 1876 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1877 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1878 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1879 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1880 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1881 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1882 1883 /* Type of request operation */ 1884 #define CIFS_ECHO_OP 0x080 /* echo request */ 1885 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1886 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1887 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1888 /* Lower bitmask values are reserved by others below. */ 1889 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1890 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1891 1892 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1893 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1894 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1895 1896 /* Security Flags: indicate type of session setup needed */ 1897 #define CIFSSEC_MAY_SIGN 0x00001 1898 #define CIFSSEC_MAY_NTLMV2 0x00004 1899 #define CIFSSEC_MAY_KRB5 0x00008 1900 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1901 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1902 1903 #define CIFSSEC_MUST_SIGN 0x01001 1904 /* note that only one of the following can be set so the 1905 result of setting MUST flags more than once will be to 1906 require use of the stronger protocol */ 1907 #define CIFSSEC_MUST_NTLMV2 0x04004 1908 #define CIFSSEC_MUST_KRB5 0x08008 1909 #ifdef CONFIG_CIFS_UPCALL 1910 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1911 #else 1912 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1913 #endif /* UPCALL */ 1914 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1915 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1916 1917 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1918 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1919 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1920 /* 1921 ***************************************************************** 1922 * All constants go here 1923 ***************************************************************** 1924 */ 1925 1926 #define UID_HASH (16) 1927 1928 /* 1929 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1930 * following to be declared. 1931 */ 1932 1933 /**************************************************************************** 1934 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1935 * to the locking order. i.e. if two locks are to be held together, the lock that 1936 * appears higher in this list needs to be taken before the other. 1937 * 1938 * If you hold a lock that is lower in this list, and you need to take a higher lock 1939 * (or if you think that one of the functions that you're calling may need to), first 1940 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1941 * ensure that locks are picked up only in one direction in the below table 1942 * (top to bottom). 1943 * 1944 * Also, if you expect a function to be called with a lock held, explicitly document 1945 * this in the comments on top of your function definition. 1946 * 1947 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1948 * possible. Blocking / calling other functions with a lock held always increase 1949 * the risk of a possible deadlock. 1950 * 1951 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1952 * debug. Also, any new lock that you introduce, please add to this list in the correct 1953 * order. 1954 * 1955 * Please populate this list whenever you introduce new locks in your changes. Or in 1956 * case I've missed some existing locks. Please ensure that it's added in the list 1957 * based on the locking order expected. 1958 * 1959 * ===================================================================================== 1960 * Lock Protects Initialization fn 1961 * ===================================================================================== 1962 * vol_list_lock 1963 * vol_info->ctx_lock vol_info->ctx 1964 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1965 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1966 * reconnect_mutex 1967 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1968 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1969 * cifs_tcon 1970 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1971 * cifs_tcon->pending_opens 1972 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1973 * cifs_tcon->bytes_written 1974 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1975 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1976 * GlobalCurrentXid 1977 * GlobalTotalActiveXid 1978 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1979 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1980 * ->CurrentMid 1981 * (any changes in mid_q_entry fields) 1982 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1983 * ->credits 1984 * ->echo_credits 1985 * ->oplock_credits 1986 * ->reconnect_instance 1987 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1988 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1989 * ->iface_count 1990 * ->iface_last_update 1991 * cifs_ses->chan_lock cifs_ses->chans 1992 * ->chans_need_reconnect 1993 * ->chans_in_reconnect 1994 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1995 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1996 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1997 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1998 * ->can_cache_brlcks 1999 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 2000 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 2001 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 2002 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 2003 * ->invalidHandle initiate_cifs_search 2004 * ->oplock_break_cancelled 2005 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 2006 ****************************************************************************/ 2007 2008 #ifdef DECLARE_GLOBALS_HERE 2009 #define GLOBAL_EXTERN 2010 #else 2011 #define GLOBAL_EXTERN extern 2012 #endif 2013 2014 /* 2015 * the list of TCP_Server_Info structures, ie each of the sockets 2016 * connecting our client to a distinct server (ip address), is 2017 * chained together by cifs_tcp_ses_list. The list of all our SMB 2018 * sessions (and from that the tree connections) can be found 2019 * by iterating over cifs_tcp_ses_list 2020 */ 2021 extern struct list_head cifs_tcp_ses_list; 2022 2023 /* 2024 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 2025 * tcp session, and the list of tcon's per smb session. It also protects 2026 * the reference counters for the server, smb session, and tcon. 2027 * generally the locks should be taken in order tcp_ses_lock before 2028 * tcon->open_file_lock and that before file->file_info_lock since the 2029 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 2030 */ 2031 extern spinlock_t cifs_tcp_ses_lock; 2032 2033 /* 2034 * Global transaction id (XID) information 2035 */ 2036 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 2037 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 2038 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 2039 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2040 2041 /* 2042 * Global counters, updated atomically 2043 */ 2044 extern atomic_t sesInfoAllocCount; 2045 extern atomic_t tconInfoAllocCount; 2046 extern atomic_t tcpSesNextId; 2047 extern atomic_t tcpSesAllocCount; 2048 extern atomic_t tcpSesReconnectCount; 2049 extern atomic_t tconInfoReconnectCount; 2050 2051 /* Various Debug counters */ 2052 extern atomic_t buf_alloc_count; /* current number allocated */ 2053 extern atomic_t small_buf_alloc_count; 2054 #ifdef CONFIG_CIFS_STATS2 2055 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2056 extern atomic_t total_small_buf_alloc_count; 2057 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2058 #endif 2059 2060 /* Misc globals */ 2061 extern bool enable_oplocks; /* enable or disable oplocks */ 2062 extern bool lookupCacheEnabled; 2063 extern unsigned int global_secflags; /* if on, session setup sent 2064 with more secure ntlmssp2 challenge/resp */ 2065 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2066 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2067 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2068 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2069 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2070 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2071 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2072 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2073 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2074 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2075 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2076 extern atomic_t mid_count; 2077 2078 void cifs_oplock_break(struct work_struct *work); 2079 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2080 void smb2_deferred_work_close(struct work_struct *work); 2081 2082 extern const struct slow_work_ops cifs_oplock_break_ops; 2083 extern struct workqueue_struct *cifsiod_wq; 2084 extern struct workqueue_struct *decrypt_wq; 2085 extern struct workqueue_struct *fileinfo_put_wq; 2086 extern struct workqueue_struct *cifsoplockd_wq; 2087 extern struct workqueue_struct *deferredclose_wq; 2088 extern __u32 cifs_lock_secret; 2089 2090 extern mempool_t *cifs_mid_poolp; 2091 2092 /* Operations for different SMB versions */ 2093 #define SMB1_VERSION_STRING "1.0" 2094 #define SMB20_VERSION_STRING "2.0" 2095 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2096 extern struct smb_version_operations smb1_operations; 2097 extern struct smb_version_values smb1_values; 2098 extern struct smb_version_operations smb20_operations; 2099 extern struct smb_version_values smb20_values; 2100 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2101 #define SMB21_VERSION_STRING "2.1" 2102 extern struct smb_version_operations smb21_operations; 2103 extern struct smb_version_values smb21_values; 2104 #define SMBDEFAULT_VERSION_STRING "default" 2105 extern struct smb_version_values smbdefault_values; 2106 #define SMB3ANY_VERSION_STRING "3" 2107 extern struct smb_version_values smb3any_values; 2108 #define SMB30_VERSION_STRING "3.0" 2109 extern struct smb_version_operations smb30_operations; 2110 extern struct smb_version_values smb30_values; 2111 #define SMB302_VERSION_STRING "3.02" 2112 #define ALT_SMB302_VERSION_STRING "3.0.2" 2113 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2114 extern struct smb_version_values smb302_values; 2115 #define SMB311_VERSION_STRING "3.1.1" 2116 #define ALT_SMB311_VERSION_STRING "3.11" 2117 extern struct smb_version_operations smb311_operations; 2118 extern struct smb_version_values smb311_values; 2119 2120 static inline char *get_security_type_str(enum securityEnum sectype) 2121 { 2122 switch (sectype) { 2123 case RawNTLMSSP: 2124 return "RawNTLMSSP"; 2125 case Kerberos: 2126 return "Kerberos"; 2127 case NTLMv2: 2128 return "NTLMv2"; 2129 default: 2130 return "Unknown"; 2131 } 2132 } 2133 2134 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2135 { 2136 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2137 } 2138 2139 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2140 { 2141 /* 2142 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2143 * Subsystem Notifies That a Share Is a DFS Share. 2144 * 2145 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2146 * Application Updates a Share. 2147 */ 2148 if (!tcon || !tcon->ses || !tcon->ses->server) 2149 return false; 2150 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2151 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2152 } 2153 2154 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2155 const struct dfs_info3_param *ref) 2156 { 2157 /* 2158 * Check if all targets are capable of handling DFS referrals as per 2159 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2160 */ 2161 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2162 } 2163 2164 static inline u64 cifs_flock_len(const struct file_lock *fl) 2165 { 2166 return (u64)fl->fl_end - fl->fl_start + 1; 2167 } 2168 2169 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2170 { 2171 if (WARN_ON_ONCE(!ses || !ses->server)) 2172 return 0; 2173 /* 2174 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2175 * servers do require it during NTLMSSP. 2176 */ 2177 if (ses->server->dialect <= SMB20_PROT_ID) 2178 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2179 return sizeof(ses->workstation_name); 2180 } 2181 2182 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2183 { 2184 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2185 dst->AccessFlags = src->AccessFlags; 2186 dst->CurrentByteOffset = src->CurrentByteOffset; 2187 dst->Mode = src->Mode; 2188 dst->AlignmentRequirement = src->AlignmentRequirement; 2189 dst->FileNameLength = src->FileNameLength; 2190 } 2191 2192 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2193 int num_rqst, 2194 const u8 *sig) 2195 { 2196 unsigned int len, skip; 2197 unsigned int nents = 0; 2198 unsigned long addr; 2199 size_t data_size; 2200 int i, j; 2201 2202 /* 2203 * The first rqst has a transform header where the first 20 bytes are 2204 * not part of the encrypted blob. 2205 */ 2206 skip = 20; 2207 2208 /* Assumes the first rqst has a transform header as the first iov. 2209 * I.e. 2210 * rqst[0].rq_iov[0] is transform header 2211 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2212 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2213 */ 2214 for (i = 0; i < num_rqst; i++) { 2215 data_size = iov_iter_count(&rqst[i].rq_iter); 2216 2217 /* We really don't want a mixture of pinned and unpinned pages 2218 * in the sglist. It's hard to keep track of which is what. 2219 * Instead, we convert to a BVEC-type iterator higher up. 2220 */ 2221 if (data_size && 2222 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2223 return -EIO; 2224 2225 /* We also don't want to have any extra refs or pins to clean 2226 * up in the sglist. 2227 */ 2228 if (data_size && 2229 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2230 return -EIO; 2231 2232 for (j = 0; j < rqst[i].rq_nvec; j++) { 2233 struct kvec *iov = &rqst[i].rq_iov[j]; 2234 2235 addr = (unsigned long)iov->iov_base + skip; 2236 if (unlikely(is_vmalloc_addr((void *)addr))) { 2237 len = iov->iov_len - skip; 2238 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2239 PAGE_SIZE); 2240 } else { 2241 nents++; 2242 } 2243 skip = 0; 2244 } 2245 if (data_size) 2246 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2247 } 2248 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2249 return nents; 2250 } 2251 2252 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2253 * stack object as buf. 2254 */ 2255 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2256 const void *buf, 2257 unsigned int buflen) 2258 { 2259 unsigned long addr = (unsigned long)buf; 2260 unsigned int off = offset_in_page(addr); 2261 2262 addr &= PAGE_MASK; 2263 if (unlikely(is_vmalloc_addr((void *)addr))) { 2264 do { 2265 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2266 2267 sg_set_page(&sgtable->sgl[sgtable->nents++], 2268 vmalloc_to_page((void *)addr), len, off); 2269 2270 off = 0; 2271 addr += PAGE_SIZE; 2272 buflen -= len; 2273 } while (buflen); 2274 } else { 2275 sg_set_page(&sgtable->sgl[sgtable->nents++], 2276 virt_to_page((void *)addr), buflen, off); 2277 } 2278 } 2279 2280 struct smb2_compound_vars { 2281 struct cifs_open_parms oparms; 2282 struct kvec rsp_iov[MAX_COMPOUND]; 2283 struct smb_rqst rqst[MAX_COMPOUND]; 2284 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2285 struct kvec qi_iov; 2286 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2287 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2288 struct kvec close_iov; 2289 struct smb2_file_rename_info rename_info; 2290 struct smb2_file_link_info link_info; 2291 }; 2292 2293 #endif /* _CIFS_GLOB_H */ 2294