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 5 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 /* 1036 * Session structure. One of these for each uid session with a particular host 1037 */ 1038 struct cifs_ses { 1039 struct list_head smb_ses_list; 1040 struct list_head rlist; /* reconnect list */ 1041 struct list_head tcon_list; 1042 struct cifs_tcon *tcon_ipc; 1043 spinlock_t ses_lock; /* protect anything here that is not protected */ 1044 struct mutex session_mutex; 1045 struct TCP_Server_Info *server; /* pointer to server info */ 1046 int ses_count; /* reference counter */ 1047 enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ 1048 unsigned int overrideSecFlg; /* if non-zero override global sec flags */ 1049 char *serverOS; /* name of operating system underlying server */ 1050 char *serverNOS; /* name of network operating system of server */ 1051 char *serverDomain; /* security realm of server */ 1052 __u64 Suid; /* remote smb uid */ 1053 kuid_t linux_uid; /* overriding owner of files on the mount */ 1054 kuid_t cred_uid; /* owner of credentials */ 1055 unsigned int capabilities; 1056 char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ 1057 char *user_name; /* must not be null except during init of sess 1058 and after mount option parsing we fill it */ 1059 char *domainName; 1060 char *password; 1061 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 1062 struct session_key auth_key; 1063 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 1064 enum securityEnum sectype; /* what security flavor was specified? */ 1065 bool sign; /* is signing required? */ 1066 bool domainAuto:1; 1067 __u16 session_flags; 1068 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 1069 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1070 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 1071 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; 1072 1073 /* 1074 * Network interfaces available on the server this session is 1075 * connected to. 1076 * 1077 * Other channels can be opened by connecting and binding this 1078 * session to interfaces from this list. 1079 * 1080 * iface_lock should be taken when accessing any of these fields 1081 */ 1082 spinlock_t iface_lock; 1083 /* ========= begin: protected by iface_lock ======== */ 1084 struct list_head iface_list; 1085 size_t iface_count; 1086 unsigned long iface_last_update; /* jiffies */ 1087 /* ========= end: protected by iface_lock ======== */ 1088 1089 spinlock_t chan_lock; 1090 /* ========= begin: protected by chan_lock ======== */ 1091 #define CIFS_MAX_CHANNELS 16 1092 #define CIFS_INVAL_CHAN_INDEX (-1) 1093 #define CIFS_ALL_CHANNELS_SET(ses) \ 1094 ((1UL << (ses)->chan_count) - 1) 1095 #define CIFS_ALL_CHANS_GOOD(ses) \ 1096 (!(ses)->chans_need_reconnect) 1097 #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ 1098 ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) 1099 #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ 1100 ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) 1101 #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ 1102 test_bit((index), &(ses)->chans_need_reconnect) 1103 #define CIFS_CHAN_IN_RECONNECT(ses, index) \ 1104 ((ses)->chans[(index)].in_reconnect) 1105 1106 struct cifs_chan chans[CIFS_MAX_CHANNELS]; 1107 size_t chan_count; 1108 size_t chan_max; 1109 atomic_t chan_seq; /* round robin state */ 1110 1111 /* 1112 * chans_need_reconnect is a bitmap indicating which of the channels 1113 * under this smb session needs to be reconnected. 1114 * If not multichannel session, only one bit will be used. 1115 * 1116 * We will ask for sess and tcon reconnection only if all the 1117 * channels are marked for needing reconnection. This will 1118 * enable the sessions on top to continue to live till any 1119 * of the channels below are active. 1120 */ 1121 unsigned long chans_need_reconnect; 1122 /* ========= end: protected by chan_lock ======== */ 1123 struct cifs_ses *dfs_root_ses; 1124 struct nls_table *local_nls; 1125 }; 1126 1127 static inline bool 1128 cap_unix(struct cifs_ses *ses) 1129 { 1130 return ses->server->vals->cap_unix & ses->capabilities; 1131 } 1132 1133 /* 1134 * common struct for holding inode info when searching for or updating an 1135 * inode with new info 1136 */ 1137 1138 #define CIFS_FATTR_JUNCTION 0x1 1139 #define CIFS_FATTR_DELETE_PENDING 0x2 1140 #define CIFS_FATTR_NEED_REVAL 0x4 1141 #define CIFS_FATTR_INO_COLLISION 0x8 1142 #define CIFS_FATTR_UNKNOWN_NLINK 0x10 1143 #define CIFS_FATTR_FAKE_ROOT_INO 0x20 1144 1145 struct cifs_fattr { 1146 u32 cf_flags; 1147 u32 cf_cifsattrs; 1148 u64 cf_uniqueid; 1149 u64 cf_eof; 1150 u64 cf_bytes; 1151 u64 cf_createtime; 1152 kuid_t cf_uid; 1153 kgid_t cf_gid; 1154 umode_t cf_mode; 1155 dev_t cf_rdev; 1156 unsigned int cf_nlink; 1157 unsigned int cf_dtype; 1158 struct timespec64 cf_atime; 1159 struct timespec64 cf_mtime; 1160 struct timespec64 cf_ctime; 1161 u32 cf_cifstag; 1162 char *cf_symlink_target; 1163 }; 1164 1165 /* 1166 * there is one of these for each connection to a resource on a particular 1167 * session 1168 */ 1169 struct cifs_tcon { 1170 struct list_head tcon_list; 1171 int tc_count; 1172 struct list_head rlist; /* reconnect list */ 1173 spinlock_t tc_lock; /* protect anything here that is not protected */ 1174 atomic_t num_local_opens; /* num of all opens including disconnected */ 1175 atomic_t num_remote_opens; /* num of all network opens on server */ 1176 struct list_head openFileList; 1177 spinlock_t open_file_lock; /* protects list above */ 1178 struct cifs_ses *ses; /* pointer to session associated with */ 1179 char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ 1180 char *nativeFileSystem; 1181 char *password; /* for share-level security */ 1182 __u32 tid; /* The 4 byte tree id */ 1183 __u16 Flags; /* optional support bits */ 1184 enum tid_status_enum status; 1185 atomic_t num_smbs_sent; 1186 union { 1187 struct { 1188 atomic_t num_writes; 1189 atomic_t num_reads; 1190 atomic_t num_flushes; 1191 atomic_t num_oplock_brks; 1192 atomic_t num_opens; 1193 atomic_t num_closes; 1194 atomic_t num_deletes; 1195 atomic_t num_mkdirs; 1196 atomic_t num_posixopens; 1197 atomic_t num_posixmkdirs; 1198 atomic_t num_rmdirs; 1199 atomic_t num_renames; 1200 atomic_t num_t2renames; 1201 atomic_t num_ffirst; 1202 atomic_t num_fnext; 1203 atomic_t num_fclose; 1204 atomic_t num_hardlinks; 1205 atomic_t num_symlinks; 1206 atomic_t num_locks; 1207 atomic_t num_acl_get; 1208 atomic_t num_acl_set; 1209 } cifs_stats; 1210 struct { 1211 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; 1212 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; 1213 } smb2_stats; 1214 } stats; 1215 __u64 bytes_read; 1216 __u64 bytes_written; 1217 spinlock_t stat_lock; /* protects the two fields above */ 1218 time64_t stats_from_time; 1219 FILE_SYSTEM_DEVICE_INFO fsDevInfo; 1220 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ 1221 FILE_SYSTEM_UNIX_INFO fsUnixInfo; 1222 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ 1223 bool pipe:1; /* set if connection to pipe share */ 1224 bool print:1; /* set if connection to printer share */ 1225 bool retry:1; 1226 bool nocase:1; 1227 bool nohandlecache:1; /* if strange server resource prob can turn off */ 1228 bool nodelete:1; 1229 bool seal:1; /* transport encryption for this mounted share */ 1230 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol 1231 for this mount even if server would support */ 1232 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ 1233 bool local_lease:1; /* check leases (only) on local system not remote */ 1234 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ 1235 bool broken_sparse_sup; /* if server or share does not support sparse */ 1236 bool need_reconnect:1; /* connection reset, tid now invalid */ 1237 bool need_reopen_files:1; /* need to reopen tcon file handles */ 1238 bool use_resilient:1; /* use resilient instead of durable handles */ 1239 bool use_persistent:1; /* use persistent instead of durable handles */ 1240 bool no_lease:1; /* Do not request leases on files or directories */ 1241 bool use_witness:1; /* use witness protocol */ 1242 __le32 capabilities; 1243 __u32 share_flags; 1244 __u32 maximal_access; 1245 __u32 vol_serial_number; 1246 __le64 vol_create_time; 1247 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ 1248 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 1249 __u32 ss_flags; /* sector size flags */ 1250 __u32 perf_sector_size; /* best sector size for perf */ 1251 __u32 max_chunks; 1252 __u32 max_bytes_chunk; 1253 __u32 max_bytes_copy; 1254 __u32 max_cached_dirs; 1255 #ifdef CONFIG_CIFS_FSCACHE 1256 u64 resource_id; /* server resource id */ 1257 struct fscache_volume *fscache; /* cookie for share */ 1258 #endif 1259 struct list_head pending_opens; /* list of incomplete opens */ 1260 struct cached_fids *cfids; 1261 /* BB add field for back pointer to sb struct(s)? */ 1262 #ifdef CONFIG_CIFS_DFS_UPCALL 1263 struct list_head dfs_ses_list; 1264 struct delayed_work dfs_cache_work; 1265 #endif 1266 struct delayed_work query_interfaces; /* query interfaces workqueue job */ 1267 char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ 1268 }; 1269 1270 /* 1271 * This is a refcounted and timestamped container for a tcon pointer. The 1272 * container holds a tcon reference. It is considered safe to free one of 1273 * these when the tl_count goes to 0. The tl_time is the time of the last 1274 * "get" on the container. 1275 */ 1276 struct tcon_link { 1277 struct rb_node tl_rbnode; 1278 kuid_t tl_uid; 1279 unsigned long tl_flags; 1280 #define TCON_LINK_MASTER 0 1281 #define TCON_LINK_PENDING 1 1282 #define TCON_LINK_IN_TREE 2 1283 unsigned long tl_time; 1284 atomic_t tl_count; 1285 struct cifs_tcon *tl_tcon; 1286 }; 1287 1288 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); 1289 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); 1290 1291 static inline struct cifs_tcon * 1292 tlink_tcon(struct tcon_link *tlink) 1293 { 1294 return tlink->tl_tcon; 1295 } 1296 1297 static inline struct tcon_link * 1298 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) 1299 { 1300 return cifs_sb->master_tlink; 1301 } 1302 1303 extern void cifs_put_tlink(struct tcon_link *tlink); 1304 1305 static inline struct tcon_link * 1306 cifs_get_tlink(struct tcon_link *tlink) 1307 { 1308 if (tlink && !IS_ERR(tlink)) 1309 atomic_inc(&tlink->tl_count); 1310 return tlink; 1311 } 1312 1313 /* This function is always expected to succeed */ 1314 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); 1315 1316 #define CIFS_OPLOCK_NO_CHANGE 0xfe 1317 1318 struct cifs_pending_open { 1319 struct list_head olist; 1320 struct tcon_link *tlink; 1321 __u8 lease_key[16]; 1322 __u32 oplock; 1323 }; 1324 1325 struct cifs_deferred_close { 1326 struct list_head dlist; 1327 struct tcon_link *tlink; 1328 __u16 netfid; 1329 __u64 persistent_fid; 1330 __u64 volatile_fid; 1331 }; 1332 1333 /* 1334 * This info hangs off the cifsFileInfo structure, pointed to by llist. 1335 * This is used to track byte stream locks on the file 1336 */ 1337 struct cifsLockInfo { 1338 struct list_head llist; /* pointer to next cifsLockInfo */ 1339 struct list_head blist; /* pointer to locks blocked on this */ 1340 wait_queue_head_t block_q; 1341 __u64 offset; 1342 __u64 length; 1343 __u32 pid; 1344 __u16 type; 1345 __u16 flags; 1346 }; 1347 1348 /* 1349 * One of these for each open instance of a file 1350 */ 1351 struct cifs_search_info { 1352 loff_t index_of_last_entry; 1353 __u16 entries_in_buffer; 1354 __u16 info_level; 1355 __u32 resume_key; 1356 char *ntwrk_buf_start; 1357 char *srch_entries_start; 1358 char *last_entry; 1359 const char *presume_name; 1360 unsigned int resume_name_len; 1361 bool endOfSearch:1; 1362 bool emptyDir:1; 1363 bool unicode:1; 1364 bool smallBuf:1; /* so we know which buf_release function to call */ 1365 }; 1366 1367 #define ACL_NO_MODE ((umode_t)(-1)) 1368 struct cifs_open_parms { 1369 struct cifs_tcon *tcon; 1370 struct cifs_sb_info *cifs_sb; 1371 int disposition; 1372 int desired_access; 1373 int create_options; 1374 const char *path; 1375 struct cifs_fid *fid; 1376 umode_t mode; 1377 bool reconnect:1; 1378 }; 1379 1380 struct cifs_fid { 1381 __u16 netfid; 1382 __u64 persistent_fid; /* persist file id for smb2 */ 1383 __u64 volatile_fid; /* volatile file id for smb2 */ 1384 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ 1385 __u8 create_guid[16]; 1386 __u32 access; 1387 struct cifs_pending_open *pending_open; 1388 unsigned int epoch; 1389 #ifdef CONFIG_CIFS_DEBUG2 1390 __u64 mid; 1391 #endif /* CIFS_DEBUG2 */ 1392 bool purge_cache; 1393 }; 1394 1395 struct cifs_fid_locks { 1396 struct list_head llist; 1397 struct cifsFileInfo *cfile; /* fid that owns locks */ 1398 struct list_head locks; /* locks held by fid above */ 1399 }; 1400 1401 struct cifsFileInfo { 1402 /* following two lists are protected by tcon->open_file_lock */ 1403 struct list_head tlist; /* pointer to next fid owned by tcon */ 1404 struct list_head flist; /* next fid (file instance) for this inode */ 1405 /* lock list below protected by cifsi->lock_sem */ 1406 struct cifs_fid_locks *llist; /* brlocks held by this fid */ 1407 kuid_t uid; /* allows finding which FileInfo structure */ 1408 __u32 pid; /* process id who opened file */ 1409 struct cifs_fid fid; /* file id from remote */ 1410 struct list_head rlist; /* reconnect list */ 1411 /* BB add lock scope info here if needed */ 1412 /* lock scope id (0 if none) */ 1413 struct dentry *dentry; 1414 struct tcon_link *tlink; 1415 unsigned int f_flags; 1416 bool invalidHandle:1; /* file closed via session abend */ 1417 bool swapfile:1; 1418 bool oplock_break_cancelled:1; 1419 unsigned int oplock_epoch; /* epoch from the lease break */ 1420 __u32 oplock_level; /* oplock/lease level from the lease break */ 1421 int count; 1422 spinlock_t file_info_lock; /* protects four flag/count fields above */ 1423 struct mutex fh_mutex; /* prevents reopen race after dead ses*/ 1424 struct cifs_search_info srch_inf; 1425 struct work_struct oplock_break; /* work for oplock breaks */ 1426 struct work_struct put; /* work for the final part of _put */ 1427 struct delayed_work deferred; 1428 bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ 1429 char *symlink_target; 1430 }; 1431 1432 struct cifs_io_parms { 1433 __u16 netfid; 1434 __u64 persistent_fid; /* persist file id for smb2 */ 1435 __u64 volatile_fid; /* volatile file id for smb2 */ 1436 __u32 pid; 1437 __u64 offset; 1438 unsigned int length; 1439 struct cifs_tcon *tcon; 1440 struct TCP_Server_Info *server; 1441 }; 1442 1443 struct cifs_aio_ctx { 1444 struct kref refcount; 1445 struct list_head list; 1446 struct mutex aio_mutex; 1447 struct completion done; 1448 struct iov_iter iter; 1449 struct kiocb *iocb; 1450 struct cifsFileInfo *cfile; 1451 struct bio_vec *bv; 1452 loff_t pos; 1453 unsigned int nr_pinned_pages; 1454 ssize_t rc; 1455 unsigned int len; 1456 unsigned int total_len; 1457 unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ 1458 bool should_dirty; 1459 /* 1460 * Indicates if this aio_ctx is for direct_io, 1461 * If yes, iter is a copy of the user passed iov_iter 1462 */ 1463 bool direct_io; 1464 }; 1465 1466 /* asynchronous read support */ 1467 struct cifs_readdata { 1468 struct kref refcount; 1469 struct list_head list; 1470 struct completion done; 1471 struct cifsFileInfo *cfile; 1472 struct address_space *mapping; 1473 struct cifs_aio_ctx *ctx; 1474 __u64 offset; 1475 ssize_t got_bytes; 1476 unsigned int bytes; 1477 pid_t pid; 1478 int result; 1479 struct work_struct work; 1480 struct iov_iter iter; 1481 struct kvec iov[2]; 1482 struct TCP_Server_Info *server; 1483 #ifdef CONFIG_CIFS_SMB_DIRECT 1484 struct smbd_mr *mr; 1485 #endif 1486 struct cifs_credits credits; 1487 }; 1488 1489 /* asynchronous write support */ 1490 struct cifs_writedata { 1491 struct kref refcount; 1492 struct list_head list; 1493 struct completion done; 1494 enum writeback_sync_modes sync_mode; 1495 struct work_struct work; 1496 struct cifsFileInfo *cfile; 1497 struct cifs_aio_ctx *ctx; 1498 struct iov_iter iter; 1499 struct bio_vec *bv; 1500 __u64 offset; 1501 pid_t pid; 1502 unsigned int bytes; 1503 int result; 1504 struct TCP_Server_Info *server; 1505 #ifdef CONFIG_CIFS_SMB_DIRECT 1506 struct smbd_mr *mr; 1507 #endif 1508 struct cifs_credits credits; 1509 bool replay; 1510 }; 1511 1512 /* 1513 * Take a reference on the file private data. Must be called with 1514 * cfile->file_info_lock held. 1515 */ 1516 static inline void 1517 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) 1518 { 1519 ++cifs_file->count; 1520 } 1521 1522 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); 1523 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, 1524 bool offload); 1525 void cifsFileInfo_put(struct cifsFileInfo *cifs_file); 1526 1527 #define CIFS_CACHE_READ_FLG 1 1528 #define CIFS_CACHE_HANDLE_FLG 2 1529 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) 1530 #define CIFS_CACHE_WRITE_FLG 4 1531 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) 1532 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) 1533 1534 #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)) 1535 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) 1536 #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)) 1537 1538 /* 1539 * One of these for each file inode 1540 */ 1541 1542 struct cifsInodeInfo { 1543 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 1544 bool can_cache_brlcks; 1545 struct list_head llist; /* locks helb by this inode */ 1546 /* 1547 * NOTE: Some code paths call down_read(lock_sem) twice, so 1548 * we must always use cifs_down_write() instead of down_write() 1549 * for this semaphore to avoid deadlocks. 1550 */ 1551 struct rw_semaphore lock_sem; /* protect the fields above */ 1552 /* BB add in lists for dirty pages i.e. write caching info for oplock */ 1553 struct list_head openFileList; 1554 spinlock_t open_file_lock; /* protects openFileList */ 1555 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ 1556 unsigned int oplock; /* oplock/lease level we have */ 1557 unsigned int epoch; /* used to track lease state changes */ 1558 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ 1559 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ 1560 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ 1561 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ 1562 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ 1563 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ 1564 #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ 1565 #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ 1566 unsigned long flags; 1567 spinlock_t writers_lock; 1568 unsigned int writers; /* Number of writers on this inode */ 1569 unsigned long time; /* jiffies of last update of inode */ 1570 u64 uniqueid; /* server inode number */ 1571 u64 createtime; /* creation time on server */ 1572 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ 1573 struct list_head deferred_closes; /* list of deferred closes */ 1574 spinlock_t deferred_lock; /* protection on deferred list */ 1575 bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ 1576 char *symlink_target; 1577 __u32 reparse_tag; 1578 }; 1579 1580 static inline struct cifsInodeInfo * 1581 CIFS_I(struct inode *inode) 1582 { 1583 return container_of(inode, struct cifsInodeInfo, netfs.inode); 1584 } 1585 1586 static inline struct cifs_sb_info * 1587 CIFS_SB(struct super_block *sb) 1588 { 1589 return sb->s_fs_info; 1590 } 1591 1592 static inline struct cifs_sb_info * 1593 CIFS_FILE_SB(struct file *file) 1594 { 1595 return CIFS_SB(file_inode(file)->i_sb); 1596 } 1597 1598 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) 1599 { 1600 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 1601 return '/'; 1602 else 1603 return '\\'; 1604 } 1605 1606 static inline void 1607 convert_delimiter(char *path, char delim) 1608 { 1609 char old_delim, *pos; 1610 1611 if (delim == '/') 1612 old_delim = '\\'; 1613 else 1614 old_delim = '/'; 1615 1616 pos = path; 1617 while ((pos = strchr(pos, old_delim))) 1618 *pos = delim; 1619 } 1620 1621 #define cifs_stats_inc atomic_inc 1622 1623 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, 1624 unsigned int bytes) 1625 { 1626 if (bytes) { 1627 spin_lock(&tcon->stat_lock); 1628 tcon->bytes_written += bytes; 1629 spin_unlock(&tcon->stat_lock); 1630 } 1631 } 1632 1633 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, 1634 unsigned int bytes) 1635 { 1636 spin_lock(&tcon->stat_lock); 1637 tcon->bytes_read += bytes; 1638 spin_unlock(&tcon->stat_lock); 1639 } 1640 1641 1642 /* 1643 * This is the prototype for the mid receive function. This function is for 1644 * receiving the rest of the SMB frame, starting with the WordCount (which is 1645 * just after the MID in struct smb_hdr). Note: 1646 * 1647 * - This will be called by cifsd, with no locks held. 1648 * - The mid will still be on the pending_mid_q. 1649 * - mid->resp_buf will point to the current buffer. 1650 * 1651 * Returns zero on a successful receive, or an error. The receive state in 1652 * the TCP_Server_Info will also be updated. 1653 */ 1654 typedef int (mid_receive_t)(struct TCP_Server_Info *server, 1655 struct mid_q_entry *mid); 1656 1657 /* 1658 * This is the prototype for the mid callback function. This is called once the 1659 * mid has been received off of the socket. When creating one, take special 1660 * care to avoid deadlocks. Things to bear in mind: 1661 * 1662 * - it will be called by cifsd, with no locks held 1663 * - the mid will be removed from any lists 1664 */ 1665 typedef void (mid_callback_t)(struct mid_q_entry *mid); 1666 1667 /* 1668 * This is the protopyte for mid handle function. This is called once the mid 1669 * has been recognized after decryption of the message. 1670 */ 1671 typedef int (mid_handle_t)(struct TCP_Server_Info *server, 1672 struct mid_q_entry *mid); 1673 1674 /* one of these for every pending CIFS request to the server */ 1675 struct mid_q_entry { 1676 struct list_head qhead; /* mids waiting on reply from this server */ 1677 struct kref refcount; 1678 struct TCP_Server_Info *server; /* server corresponding to this mid */ 1679 __u64 mid; /* multiplex id */ 1680 __u16 credits; /* number of credits consumed by this mid */ 1681 __u16 credits_received; /* number of credits from the response */ 1682 __u32 pid; /* process id */ 1683 __u32 sequence_number; /* for CIFS signing */ 1684 unsigned long when_alloc; /* when mid was created */ 1685 #ifdef CONFIG_CIFS_STATS2 1686 unsigned long when_sent; /* time when smb send finished */ 1687 unsigned long when_received; /* when demux complete (taken off wire) */ 1688 #endif 1689 mid_receive_t *receive; /* call receive callback */ 1690 mid_callback_t *callback; /* call completion callback */ 1691 mid_handle_t *handle; /* call handle mid callback */ 1692 void *callback_data; /* general purpose pointer for callback */ 1693 struct task_struct *creator; 1694 void *resp_buf; /* pointer to received SMB header */ 1695 unsigned int resp_buf_size; 1696 int mid_state; /* wish this were enum but can not pass to wait_event */ 1697 unsigned int mid_flags; 1698 __le16 command; /* smb command code */ 1699 unsigned int optype; /* operation type */ 1700 bool large_buf:1; /* if valid response, is pointer to large buf */ 1701 bool multiRsp:1; /* multiple trans2 responses for one request */ 1702 bool multiEnd:1; /* both received */ 1703 bool decrypted:1; /* decrypted entry */ 1704 }; 1705 1706 struct close_cancelled_open { 1707 struct cifs_fid fid; 1708 struct cifs_tcon *tcon; 1709 struct work_struct work; 1710 __u64 mid; 1711 __u16 cmd; 1712 }; 1713 1714 /* Make code in transport.c a little cleaner by moving 1715 update of optional stats into function below */ 1716 static inline void cifs_in_send_inc(struct TCP_Server_Info *server) 1717 { 1718 atomic_inc(&server->in_send); 1719 } 1720 1721 static inline void cifs_in_send_dec(struct TCP_Server_Info *server) 1722 { 1723 atomic_dec(&server->in_send); 1724 } 1725 1726 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) 1727 { 1728 atomic_inc(&server->num_waiters); 1729 } 1730 1731 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) 1732 { 1733 atomic_dec(&server->num_waiters); 1734 } 1735 1736 #ifdef CONFIG_CIFS_STATS2 1737 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1738 { 1739 mid->when_sent = jiffies; 1740 } 1741 #else 1742 static inline void cifs_save_when_sent(struct mid_q_entry *mid) 1743 { 1744 } 1745 #endif 1746 1747 /* for pending dnotify requests */ 1748 struct dir_notify_req { 1749 struct list_head lhead; 1750 __le16 Pid; 1751 __le16 PidHigh; 1752 __u16 Mid; 1753 __u16 Tid; 1754 __u16 Uid; 1755 __u16 netfid; 1756 __u32 filter; /* CompletionFilter (for multishot) */ 1757 int multishot; 1758 struct file *pfile; 1759 }; 1760 1761 struct dfs_info3_param { 1762 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ 1763 int path_consumed; 1764 int server_type; 1765 int ref_flag; 1766 char *path_name; 1767 char *node_name; 1768 int ttl; 1769 }; 1770 1771 struct file_list { 1772 struct list_head list; 1773 struct cifsFileInfo *cfile; 1774 }; 1775 1776 struct cifs_mount_ctx { 1777 struct cifs_sb_info *cifs_sb; 1778 struct smb3_fs_context *fs_ctx; 1779 unsigned int xid; 1780 struct TCP_Server_Info *server; 1781 struct cifs_ses *ses; 1782 struct cifs_tcon *tcon; 1783 struct list_head dfs_ses_list; 1784 }; 1785 1786 static inline void __free_dfs_info_param(struct dfs_info3_param *param) 1787 { 1788 kfree(param->path_name); 1789 kfree(param->node_name); 1790 } 1791 1792 static inline void free_dfs_info_param(struct dfs_info3_param *param) 1793 { 1794 if (param) 1795 __free_dfs_info_param(param); 1796 } 1797 1798 static inline void zfree_dfs_info_param(struct dfs_info3_param *param) 1799 { 1800 if (param) { 1801 __free_dfs_info_param(param); 1802 memset(param, 0, sizeof(*param)); 1803 } 1804 } 1805 1806 static inline void free_dfs_info_array(struct dfs_info3_param *param, 1807 int number_of_items) 1808 { 1809 int i; 1810 1811 if ((number_of_items == 0) || (param == NULL)) 1812 return; 1813 for (i = 0; i < number_of_items; i++) { 1814 kfree(param[i].path_name); 1815 kfree(param[i].node_name); 1816 } 1817 kfree(param); 1818 } 1819 1820 static inline bool is_interrupt_error(int error) 1821 { 1822 switch (error) { 1823 case -EINTR: 1824 case -ERESTARTSYS: 1825 case -ERESTARTNOHAND: 1826 case -ERESTARTNOINTR: 1827 return true; 1828 } 1829 return false; 1830 } 1831 1832 static inline bool is_retryable_error(int error) 1833 { 1834 if (is_interrupt_error(error) || error == -EAGAIN) 1835 return true; 1836 return false; 1837 } 1838 1839 static inline bool is_replayable_error(int error) 1840 { 1841 if (error == -EAGAIN || error == -ECONNABORTED) 1842 return true; 1843 return false; 1844 } 1845 1846 1847 /* cifs_get_writable_file() flags */ 1848 #define FIND_WR_ANY 0 1849 #define FIND_WR_FSUID_ONLY 1 1850 #define FIND_WR_WITH_DELETE 2 1851 1852 #define MID_FREE 0 1853 #define MID_REQUEST_ALLOCATED 1 1854 #define MID_REQUEST_SUBMITTED 2 1855 #define MID_RESPONSE_RECEIVED 4 1856 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ 1857 #define MID_RESPONSE_MALFORMED 0x10 1858 #define MID_SHUTDOWN 0x20 1859 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ 1860 1861 /* Flags */ 1862 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ 1863 #define MID_DELETED 2 /* Mid has been dequeued/deleted */ 1864 1865 /* Types of response buffer returned from SendReceive2 */ 1866 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ 1867 #define CIFS_SMALL_BUFFER 1 1868 #define CIFS_LARGE_BUFFER 2 1869 #define CIFS_IOVEC 4 /* array of response buffers */ 1870 1871 /* Type of Request to SendReceive2 */ 1872 #define CIFS_BLOCKING_OP 1 /* operation can block */ 1873 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ 1874 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ 1875 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ 1876 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ 1877 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ 1878 1879 /* Type of request operation */ 1880 #define CIFS_ECHO_OP 0x080 /* echo request */ 1881 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ 1882 #define CIFS_NEG_OP 0x0200 /* negotiate request */ 1883 #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ 1884 /* Lower bitmask values are reserved by others below. */ 1885 #define CIFS_SESS_OP 0x2000 /* session setup request */ 1886 #define CIFS_OP_MASK 0x2780 /* mask request type */ 1887 1888 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ 1889 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ 1890 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ 1891 1892 /* Security Flags: indicate type of session setup needed */ 1893 #define CIFSSEC_MAY_SIGN 0x00001 1894 #define CIFSSEC_MAY_NTLMV2 0x00004 1895 #define CIFSSEC_MAY_KRB5 0x00008 1896 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ 1897 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ 1898 1899 #define CIFSSEC_MUST_SIGN 0x01001 1900 /* note that only one of the following can be set so the 1901 result of setting MUST flags more than once will be to 1902 require use of the stronger protocol */ 1903 #define CIFSSEC_MUST_NTLMV2 0x04004 1904 #define CIFSSEC_MUST_KRB5 0x08008 1905 #ifdef CONFIG_CIFS_UPCALL 1906 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ 1907 #else 1908 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ 1909 #endif /* UPCALL */ 1910 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1911 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1912 1913 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) 1914 #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) 1915 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1916 /* 1917 ***************************************************************** 1918 * All constants go here 1919 ***************************************************************** 1920 */ 1921 1922 #define UID_HASH (16) 1923 1924 /* 1925 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the 1926 * following to be declared. 1927 */ 1928 1929 /**************************************************************************** 1930 * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according 1931 * to the locking order. i.e. if two locks are to be held together, the lock that 1932 * appears higher in this list needs to be taken before the other. 1933 * 1934 * If you hold a lock that is lower in this list, and you need to take a higher lock 1935 * (or if you think that one of the functions that you're calling may need to), first 1936 * drop the lock you hold, pick up the higher lock, then the lower one. This will 1937 * ensure that locks are picked up only in one direction in the below table 1938 * (top to bottom). 1939 * 1940 * Also, if you expect a function to be called with a lock held, explicitly document 1941 * this in the comments on top of your function definition. 1942 * 1943 * And also, try to keep the critical sections (lock hold time) to be as minimal as 1944 * possible. Blocking / calling other functions with a lock held always increase 1945 * the risk of a possible deadlock. 1946 * 1947 * Following this rule will avoid unnecessary deadlocks, which can get really hard to 1948 * debug. Also, any new lock that you introduce, please add to this list in the correct 1949 * order. 1950 * 1951 * Please populate this list whenever you introduce new locks in your changes. Or in 1952 * case I've missed some existing locks. Please ensure that it's added in the list 1953 * based on the locking order expected. 1954 * 1955 * ===================================================================================== 1956 * Lock Protects Initialization fn 1957 * ===================================================================================== 1958 * vol_list_lock 1959 * vol_info->ctx_lock vol_info->ctx 1960 * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb 1961 * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session 1962 * reconnect_mutex 1963 * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session 1964 * cifs_ses->session_mutex cifs_ses sesInfoAlloc 1965 * cifs_tcon 1966 * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc 1967 * cifs_tcon->pending_opens 1968 * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc 1969 * cifs_tcon->bytes_written 1970 * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc 1971 * GlobalMid_Lock GlobalMaxActiveXid init_cifs 1972 * GlobalCurrentXid 1973 * GlobalTotalActiveXid 1974 * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) 1975 * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session 1976 * ->CurrentMid 1977 * (any changes in mid_q_entry fields) 1978 * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session 1979 * ->credits 1980 * ->echo_credits 1981 * ->oplock_credits 1982 * ->reconnect_instance 1983 * cifs_ses->ses_lock (anything that is not protected by another lock and can change) 1984 * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc 1985 * ->iface_count 1986 * ->iface_last_update 1987 * cifs_ses->chan_lock cifs_ses->chans 1988 * ->chans_need_reconnect 1989 * ->chans_in_reconnect 1990 * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) 1991 * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode 1992 * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc 1993 * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once 1994 * ->can_cache_brlcks 1995 * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc 1996 * cached_fid->fid_mutex cifs_tcon->crfid tcon_info_alloc 1997 * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo 1998 * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo 1999 * ->invalidHandle initiate_cifs_search 2000 * ->oplock_break_cancelled 2001 * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc 2002 ****************************************************************************/ 2003 2004 #ifdef DECLARE_GLOBALS_HERE 2005 #define GLOBAL_EXTERN 2006 #else 2007 #define GLOBAL_EXTERN extern 2008 #endif 2009 2010 /* 2011 * the list of TCP_Server_Info structures, ie each of the sockets 2012 * connecting our client to a distinct server (ip address), is 2013 * chained together by cifs_tcp_ses_list. The list of all our SMB 2014 * sessions (and from that the tree connections) can be found 2015 * by iterating over cifs_tcp_ses_list 2016 */ 2017 extern struct list_head cifs_tcp_ses_list; 2018 2019 /* 2020 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per 2021 * tcp session, and the list of tcon's per smb session. It also protects 2022 * the reference counters for the server, smb session, and tcon. 2023 * generally the locks should be taken in order tcp_ses_lock before 2024 * tcon->open_file_lock and that before file->file_info_lock since the 2025 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file 2026 */ 2027 extern spinlock_t cifs_tcp_ses_lock; 2028 2029 /* 2030 * Global transaction id (XID) information 2031 */ 2032 extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ 2033 extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ 2034 extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ 2035 extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ 2036 2037 /* 2038 * Global counters, updated atomically 2039 */ 2040 extern atomic_t sesInfoAllocCount; 2041 extern atomic_t tconInfoAllocCount; 2042 extern atomic_t tcpSesNextId; 2043 extern atomic_t tcpSesAllocCount; 2044 extern atomic_t tcpSesReconnectCount; 2045 extern atomic_t tconInfoReconnectCount; 2046 2047 /* Various Debug counters */ 2048 extern atomic_t buf_alloc_count; /* current number allocated */ 2049 extern atomic_t small_buf_alloc_count; 2050 #ifdef CONFIG_CIFS_STATS2 2051 extern atomic_t total_buf_alloc_count; /* total allocated over all time */ 2052 extern atomic_t total_small_buf_alloc_count; 2053 extern unsigned int slow_rsp_threshold; /* number of secs before logging */ 2054 #endif 2055 2056 /* Misc globals */ 2057 extern bool enable_oplocks; /* enable or disable oplocks */ 2058 extern bool lookupCacheEnabled; 2059 extern unsigned int global_secflags; /* if on, session setup sent 2060 with more secure ntlmssp2 challenge/resp */ 2061 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ 2062 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ 2063 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ 2064 extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ 2065 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ 2066 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ 2067 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ 2068 extern unsigned int cifs_min_small; /* min size of small buf pool */ 2069 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ 2070 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 2071 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ 2072 extern atomic_t mid_count; 2073 2074 void cifs_oplock_break(struct work_struct *work); 2075 void cifs_queue_oplock_break(struct cifsFileInfo *cfile); 2076 void smb2_deferred_work_close(struct work_struct *work); 2077 2078 extern const struct slow_work_ops cifs_oplock_break_ops; 2079 extern struct workqueue_struct *cifsiod_wq; 2080 extern struct workqueue_struct *decrypt_wq; 2081 extern struct workqueue_struct *fileinfo_put_wq; 2082 extern struct workqueue_struct *cifsoplockd_wq; 2083 extern struct workqueue_struct *deferredclose_wq; 2084 extern __u32 cifs_lock_secret; 2085 2086 extern mempool_t *cifs_mid_poolp; 2087 2088 /* Operations for different SMB versions */ 2089 #define SMB1_VERSION_STRING "1.0" 2090 #define SMB20_VERSION_STRING "2.0" 2091 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 2092 extern struct smb_version_operations smb1_operations; 2093 extern struct smb_version_values smb1_values; 2094 extern struct smb_version_operations smb20_operations; 2095 extern struct smb_version_values smb20_values; 2096 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 2097 #define SMB21_VERSION_STRING "2.1" 2098 extern struct smb_version_operations smb21_operations; 2099 extern struct smb_version_values smb21_values; 2100 #define SMBDEFAULT_VERSION_STRING "default" 2101 extern struct smb_version_values smbdefault_values; 2102 #define SMB3ANY_VERSION_STRING "3" 2103 extern struct smb_version_values smb3any_values; 2104 #define SMB30_VERSION_STRING "3.0" 2105 extern struct smb_version_operations smb30_operations; 2106 extern struct smb_version_values smb30_values; 2107 #define SMB302_VERSION_STRING "3.02" 2108 #define ALT_SMB302_VERSION_STRING "3.0.2" 2109 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ 2110 extern struct smb_version_values smb302_values; 2111 #define SMB311_VERSION_STRING "3.1.1" 2112 #define ALT_SMB311_VERSION_STRING "3.11" 2113 extern struct smb_version_operations smb311_operations; 2114 extern struct smb_version_values smb311_values; 2115 2116 static inline char *get_security_type_str(enum securityEnum sectype) 2117 { 2118 switch (sectype) { 2119 case RawNTLMSSP: 2120 return "RawNTLMSSP"; 2121 case Kerberos: 2122 return "Kerberos"; 2123 case NTLMv2: 2124 return "NTLMv2"; 2125 default: 2126 return "Unknown"; 2127 } 2128 } 2129 2130 static inline bool is_smb1_server(struct TCP_Server_Info *server) 2131 { 2132 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; 2133 } 2134 2135 static inline bool is_tcon_dfs(struct cifs_tcon *tcon) 2136 { 2137 /* 2138 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS 2139 * Subsystem Notifies That a Share Is a DFS Share. 2140 * 2141 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server 2142 * Application Updates a Share. 2143 */ 2144 if (!tcon || !tcon->ses || !tcon->ses->server) 2145 return false; 2146 return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : 2147 tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); 2148 } 2149 2150 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, 2151 const struct dfs_info3_param *ref) 2152 { 2153 /* 2154 * Check if all targets are capable of handling DFS referrals as per 2155 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. 2156 */ 2157 return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); 2158 } 2159 2160 static inline u64 cifs_flock_len(const struct file_lock *fl) 2161 { 2162 return (u64)fl->fl_end - fl->fl_start + 1; 2163 } 2164 2165 static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) 2166 { 2167 if (WARN_ON_ONCE(!ses || !ses->server)) 2168 return 0; 2169 /* 2170 * Make workstation name no more than 15 chars when using insecure dialects as some legacy 2171 * servers do require it during NTLMSSP. 2172 */ 2173 if (ses->server->dialect <= SMB20_PROT_ID) 2174 return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); 2175 return sizeof(ses->workstation_name); 2176 } 2177 2178 static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) 2179 { 2180 memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); 2181 dst->AccessFlags = src->AccessFlags; 2182 dst->CurrentByteOffset = src->CurrentByteOffset; 2183 dst->Mode = src->Mode; 2184 dst->AlignmentRequirement = src->AlignmentRequirement; 2185 dst->FileNameLength = src->FileNameLength; 2186 } 2187 2188 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 2189 int num_rqst, 2190 const u8 *sig) 2191 { 2192 unsigned int len, skip; 2193 unsigned int nents = 0; 2194 unsigned long addr; 2195 size_t data_size; 2196 int i, j; 2197 2198 /* 2199 * The first rqst has a transform header where the first 20 bytes are 2200 * not part of the encrypted blob. 2201 */ 2202 skip = 20; 2203 2204 /* Assumes the first rqst has a transform header as the first iov. 2205 * I.e. 2206 * rqst[0].rq_iov[0] is transform header 2207 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 2208 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 2209 */ 2210 for (i = 0; i < num_rqst; i++) { 2211 data_size = iov_iter_count(&rqst[i].rq_iter); 2212 2213 /* We really don't want a mixture of pinned and unpinned pages 2214 * in the sglist. It's hard to keep track of which is what. 2215 * Instead, we convert to a BVEC-type iterator higher up. 2216 */ 2217 if (data_size && 2218 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 2219 return -EIO; 2220 2221 /* We also don't want to have any extra refs or pins to clean 2222 * up in the sglist. 2223 */ 2224 if (data_size && 2225 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 2226 return -EIO; 2227 2228 for (j = 0; j < rqst[i].rq_nvec; j++) { 2229 struct kvec *iov = &rqst[i].rq_iov[j]; 2230 2231 addr = (unsigned long)iov->iov_base + skip; 2232 if (unlikely(is_vmalloc_addr((void *)addr))) { 2233 len = iov->iov_len - skip; 2234 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 2235 PAGE_SIZE); 2236 } else { 2237 nents++; 2238 } 2239 skip = 0; 2240 } 2241 if (data_size) 2242 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 2243 } 2244 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 2245 return nents; 2246 } 2247 2248 /* We can not use the normal sg_set_buf() as we will sometimes pass a 2249 * stack object as buf. 2250 */ 2251 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 2252 const void *buf, 2253 unsigned int buflen) 2254 { 2255 unsigned long addr = (unsigned long)buf; 2256 unsigned int off = offset_in_page(addr); 2257 2258 addr &= PAGE_MASK; 2259 if (unlikely(is_vmalloc_addr((void *)addr))) { 2260 do { 2261 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 2262 2263 sg_set_page(&sgtable->sgl[sgtable->nents++], 2264 vmalloc_to_page((void *)addr), len, off); 2265 2266 off = 0; 2267 addr += PAGE_SIZE; 2268 buflen -= len; 2269 } while (buflen); 2270 } else { 2271 sg_set_page(&sgtable->sgl[sgtable->nents++], 2272 virt_to_page((void *)addr), buflen, off); 2273 } 2274 } 2275 2276 struct smb2_compound_vars { 2277 struct cifs_open_parms oparms; 2278 struct kvec rsp_iov[MAX_COMPOUND]; 2279 struct smb_rqst rqst[MAX_COMPOUND]; 2280 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2281 struct kvec qi_iov; 2282 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2283 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 2284 struct kvec close_iov; 2285 struct smb2_file_rename_info rename_info; 2286 struct smb2_file_link_info link_info; 2287 }; 2288 2289 #endif /* _CIFS_GLOB_H */ 2290