| 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 "../smbfs_common/smb2pdu.h" |
| 28 | #include "smb2pdu.h" |
| 29 | #include <linux/filelock.h> |
| 30 | |
| 31 | #define SMB_PATH_MAX 260 |
| 32 | #define CIFS_PORT 445 |
| 33 | #define RFC1001_PORT 139 |
| 34 | |
| 35 | /* |
| 36 | * The sizes of various internal tables and strings |
| 37 | */ |
| 38 | #define MAX_UID_INFO 16 |
| 39 | #define MAX_SES_INFO 2 |
| 40 | #define MAX_TCON_INFO 4 |
| 41 | |
| 42 | #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) |
| 43 | |
| 44 | #define CIFS_MIN_RCV_POOL 4 |
| 45 | |
| 46 | #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ |
| 47 | /* |
| 48 | * default attribute cache timeout (jiffies) |
| 49 | */ |
| 50 | #define CIFS_DEF_ACTIMEO (1 * HZ) |
| 51 | |
| 52 | /* |
| 53 | * max attribute cache timeout (jiffies) - 2^30 |
| 54 | */ |
| 55 | #define CIFS_MAX_ACTIMEO (1 << 30) |
| 56 | |
| 57 | /* |
| 58 | * Max persistent and resilient handle timeout (milliseconds). |
| 59 | * Windows durable max was 960000 (16 minutes) |
| 60 | */ |
| 61 | #define SMB3_MAX_HANDLE_TIMEOUT 960000 |
| 62 | |
| 63 | /* |
| 64 | * MAX_REQ is the maximum number of requests that WE will send |
| 65 | * on one socket concurrently. |
| 66 | */ |
| 67 | #define CIFS_MAX_REQ 32767 |
| 68 | |
| 69 | #define RFC1001_NAME_LEN 15 |
| 70 | #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) |
| 71 | |
| 72 | /* maximum length of ip addr as a string (including ipv6 and sctp) */ |
| 73 | #define SERVER_NAME_LENGTH 80 |
| 74 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) |
| 75 | |
| 76 | /* echo interval in seconds */ |
| 77 | #define SMB_ECHO_INTERVAL_MIN 1 |
| 78 | #define SMB_ECHO_INTERVAL_MAX 600 |
| 79 | #define SMB_ECHO_INTERVAL_DEFAULT 60 |
| 80 | |
| 81 | /* smb multichannel query server interfaces interval in seconds */ |
| 82 | #define SMB_INTERFACE_POLL_INTERVAL 600 |
| 83 | |
| 84 | /* maximum number of PDUs in one compound */ |
| 85 | #define MAX_COMPOUND 5 |
| 86 | |
| 87 | /* |
| 88 | * Default number of credits to keep available for SMB3. |
| 89 | * This value is chosen somewhat arbitrarily. The Windows client |
| 90 | * defaults to 128 credits, the Windows server allows clients up to |
| 91 | * 512 credits (or 8K for later versions), and the NetApp server |
| 92 | * does not limit clients at all. Choose a high enough default value |
| 93 | * such that the client shouldn't limit performance, but allow mount |
| 94 | * to override (until you approach 64K, where we limit credits to 65000 |
| 95 | * to reduce possibility of seeing more server credit overflow bugs. |
| 96 | */ |
| 97 | #define SMB2_MAX_CREDITS_AVAILABLE 32000 |
| 98 | |
| 99 | #include "cifspdu.h" |
| 100 | |
| 101 | #ifndef XATTR_DOS_ATTRIB |
| 102 | #define XATTR_DOS_ATTRIB "user.DOSATTRIB" |
| 103 | #endif |
| 104 | |
| 105 | #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ |
| 106 | |
| 107 | #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) |
| 108 | |
| 109 | /* |
| 110 | * CIFS vfs client Status information (based on what we know.) |
| 111 | */ |
| 112 | |
| 113 | /* associated with each connection */ |
| 114 | enum statusEnum { |
| 115 | CifsNew = 0, |
| 116 | CifsGood, |
| 117 | CifsExiting, |
| 118 | CifsNeedReconnect, |
| 119 | CifsNeedNegotiate, |
| 120 | CifsInNegotiate, |
| 121 | }; |
| 122 | |
| 123 | /* associated with each smb session */ |
| 124 | enum ses_status_enum { |
| 125 | SES_NEW = 0, |
| 126 | SES_GOOD, |
| 127 | SES_EXITING, |
| 128 | SES_NEED_RECON, |
| 129 | SES_IN_SETUP |
| 130 | }; |
| 131 | |
| 132 | /* associated with each tree connection to the server */ |
| 133 | enum tid_status_enum { |
| 134 | TID_NEW = 0, |
| 135 | TID_GOOD, |
| 136 | TID_EXITING, |
| 137 | TID_NEED_RECON, |
| 138 | TID_NEED_TCON, |
| 139 | TID_IN_TCON, |
| 140 | TID_NEED_FILES_INVALIDATE, /* currently unused */ |
| 141 | TID_IN_FILES_INVALIDATE |
| 142 | }; |
| 143 | |
| 144 | enum securityEnum { |
| 145 | Unspecified = 0, /* not specified */ |
| 146 | NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ |
| 147 | RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ |
| 148 | Kerberos, /* Kerberos via SPNEGO */ |
| 149 | }; |
| 150 | |
| 151 | struct session_key { |
| 152 | unsigned int len; |
| 153 | char *response; |
| 154 | }; |
| 155 | |
| 156 | /* crypto hashing related structure/fields, not specific to a sec mech */ |
| 157 | struct cifs_secmech { |
| 158 | struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ |
| 159 | struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ |
| 160 | struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ |
| 161 | struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ |
| 162 | struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ |
| 163 | |
| 164 | struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ |
| 165 | struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ |
| 166 | }; |
| 167 | |
| 168 | /* per smb session structure/fields */ |
| 169 | struct ntlmssp_auth { |
| 170 | bool sesskey_per_smbsess; /* whether session key is per smb session */ |
| 171 | __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ |
| 172 | __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ |
| 173 | unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ |
| 174 | char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ |
| 175 | }; |
| 176 | |
| 177 | struct cifs_cred { |
| 178 | int uid; |
| 179 | int gid; |
| 180 | int mode; |
| 181 | int cecount; |
| 182 | struct cifs_sid osid; |
| 183 | struct cifs_sid gsid; |
| 184 | struct cifs_ntace *ntaces; |
| 185 | struct cifs_ace *aces; |
| 186 | }; |
| 187 | |
| 188 | struct cifs_open_info_data { |
| 189 | char *symlink_target; |
| 190 | union { |
| 191 | struct smb2_file_all_info fi; |
| 192 | struct smb311_posix_qinfo posix_fi; |
| 193 | }; |
| 194 | }; |
| 195 | |
| 196 | static inline void cifs_free_open_info(struct cifs_open_info_data *data) |
| 197 | { |
| 198 | kfree(data->symlink_target); |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | ***************************************************************** |
| 203 | * Except the CIFS PDUs themselves all the |
| 204 | * globally interesting structs should go here |
| 205 | ***************************************************************** |
| 206 | */ |
| 207 | |
| 208 | /* |
| 209 | * A smb_rqst represents a complete request to be issued to a server. It's |
| 210 | * formed by a kvec array, followed by an array of pages. Page data is assumed |
| 211 | * to start at the beginning of the first page. |
| 212 | */ |
| 213 | struct smb_rqst { |
| 214 | struct kvec *rq_iov; /* array of kvecs */ |
| 215 | unsigned int rq_nvec; /* number of kvecs in array */ |
| 216 | size_t rq_iter_size; /* Amount of data in ->rq_iter */ |
| 217 | struct iov_iter rq_iter; /* Data iterator */ |
| 218 | struct xarray rq_buffer; /* Page buffer for encryption */ |
| 219 | }; |
| 220 | |
| 221 | struct mid_q_entry; |
| 222 | struct TCP_Server_Info; |
| 223 | struct cifsFileInfo; |
| 224 | struct cifs_ses; |
| 225 | struct cifs_tcon; |
| 226 | struct dfs_info3_param; |
| 227 | struct cifs_fattr; |
| 228 | struct smb3_fs_context; |
| 229 | struct cifs_fid; |
| 230 | struct cifs_readdata; |
| 231 | struct cifs_writedata; |
| 232 | struct cifs_io_parms; |
| 233 | struct cifs_search_info; |
| 234 | struct cifsInodeInfo; |
| 235 | struct cifs_open_parms; |
| 236 | struct cifs_credits; |
| 237 | |
| 238 | struct smb_version_operations { |
| 239 | int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, |
| 240 | struct mid_q_entry *); |
| 241 | bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); |
| 242 | /* setup request: allocate mid, sign message */ |
| 243 | struct mid_q_entry *(*setup_request)(struct cifs_ses *, |
| 244 | struct TCP_Server_Info *, |
| 245 | struct smb_rqst *); |
| 246 | /* setup async request: allocate mid, sign message */ |
| 247 | struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, |
| 248 | struct smb_rqst *); |
| 249 | /* check response: verify signature, map error */ |
| 250 | int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, |
| 251 | bool); |
| 252 | void (*add_credits)(struct TCP_Server_Info *server, |
| 253 | const struct cifs_credits *credits, |
| 254 | const int optype); |
| 255 | void (*set_credits)(struct TCP_Server_Info *, const int); |
| 256 | int * (*get_credits_field)(struct TCP_Server_Info *, const int); |
| 257 | unsigned int (*get_credits)(struct mid_q_entry *); |
| 258 | __u64 (*get_next_mid)(struct TCP_Server_Info *); |
| 259 | void (*revert_current_mid)(struct TCP_Server_Info *server, |
| 260 | const unsigned int val); |
| 261 | /* data offset from read response message */ |
| 262 | unsigned int (*read_data_offset)(char *); |
| 263 | /* |
| 264 | * Data length from read response message |
| 265 | * When in_remaining is true, the returned data length is in |
| 266 | * message field DataRemaining for out-of-band data read (e.g through |
| 267 | * Memory Registration RDMA write in SMBD). |
| 268 | * Otherwise, the returned data length is in message field DataLength. |
| 269 | */ |
| 270 | unsigned int (*read_data_length)(char *, bool in_remaining); |
| 271 | /* map smb to linux error */ |
| 272 | int (*map_error)(char *, bool); |
| 273 | /* find mid corresponding to the response message */ |
| 274 | struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); |
| 275 | void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); |
| 276 | void (*clear_stats)(struct cifs_tcon *); |
| 277 | void (*print_stats)(struct seq_file *m, struct cifs_tcon *); |
| 278 | void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); |
| 279 | /* verify the message */ |
| 280 | int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); |
| 281 | bool (*is_oplock_break)(char *, struct TCP_Server_Info *); |
| 282 | int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); |
| 283 | void (*downgrade_oplock)(struct TCP_Server_Info *server, |
| 284 | struct cifsInodeInfo *cinode, __u32 oplock, |
| 285 | unsigned int epoch, bool *purge_cache); |
| 286 | /* process transaction2 response */ |
| 287 | bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, |
| 288 | char *, int); |
| 289 | /* check if we need to negotiate */ |
| 290 | bool (*need_neg)(struct TCP_Server_Info *); |
| 291 | /* negotiate to the server */ |
| 292 | int (*negotiate)(const unsigned int xid, |
| 293 | struct cifs_ses *ses, |
| 294 | struct TCP_Server_Info *server); |
| 295 | /* set negotiated write size */ |
| 296 | unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); |
| 297 | /* set negotiated read size */ |
| 298 | unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); |
| 299 | /* setup smb sessionn */ |
| 300 | int (*sess_setup)(const unsigned int, struct cifs_ses *, |
| 301 | struct TCP_Server_Info *server, |
| 302 | const struct nls_table *); |
| 303 | /* close smb session */ |
| 304 | int (*logoff)(const unsigned int, struct cifs_ses *); |
| 305 | /* connect to a server share */ |
| 306 | int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, |
| 307 | struct cifs_tcon *, const struct nls_table *); |
| 308 | /* close tree connecion */ |
| 309 | int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); |
| 310 | /* get DFS referrals */ |
| 311 | int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, |
| 312 | const char *, struct dfs_info3_param **, |
| 313 | unsigned int *, const struct nls_table *, int); |
| 314 | /* informational QFS call */ |
| 315 | void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, |
| 316 | struct cifs_sb_info *); |
| 317 | /* check if a path is accessible or not */ |
| 318 | int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, |
| 319 | struct cifs_sb_info *, const char *); |
| 320 | /* query path data from the server */ |
| 321 | int (*query_path_info)(const unsigned int xid, struct cifs_tcon *tcon, |
| 322 | struct cifs_sb_info *cifs_sb, const char *full_path, |
| 323 | struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse); |
| 324 | /* query file data from the server */ |
| 325 | int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, |
| 326 | struct cifsFileInfo *cfile, struct cifs_open_info_data *data); |
| 327 | /* query reparse tag from srv to determine which type of special file */ |
| 328 | int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon, |
| 329 | struct cifs_sb_info *cifs_sb, const char *path, |
| 330 | __u32 *reparse_tag); |
| 331 | /* get server index number */ |
| 332 | int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, |
| 333 | struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, |
| 334 | struct cifs_open_info_data *data); |
| 335 | /* set size by path */ |
| 336 | int (*set_path_size)(const unsigned int, struct cifs_tcon *, |
| 337 | const char *, __u64, struct cifs_sb_info *, bool); |
| 338 | /* set size by file handle */ |
| 339 | int (*set_file_size)(const unsigned int, struct cifs_tcon *, |
| 340 | struct cifsFileInfo *, __u64, bool); |
| 341 | /* set attributes */ |
| 342 | int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, |
| 343 | const unsigned int); |
| 344 | int (*set_compression)(const unsigned int, struct cifs_tcon *, |
| 345 | struct cifsFileInfo *); |
| 346 | /* check if we can send an echo or nor */ |
| 347 | bool (*can_echo)(struct TCP_Server_Info *); |
| 348 | /* send echo request */ |
| 349 | int (*echo)(struct TCP_Server_Info *); |
| 350 | /* create directory */ |
| 351 | int (*posix_mkdir)(const unsigned int xid, struct inode *inode, |
| 352 | umode_t mode, struct cifs_tcon *tcon, |
| 353 | const char *full_path, |
| 354 | struct cifs_sb_info *cifs_sb); |
| 355 | int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, |
| 356 | struct cifs_tcon *tcon, const char *name, |
| 357 | struct cifs_sb_info *sb); |
| 358 | /* set info on created directory */ |
| 359 | void (*mkdir_setinfo)(struct inode *, const char *, |
| 360 | struct cifs_sb_info *, struct cifs_tcon *, |
| 361 | const unsigned int); |
| 362 | /* remove directory */ |
| 363 | int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, |
| 364 | struct cifs_sb_info *); |
| 365 | /* unlink file */ |
| 366 | int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, |
| 367 | struct cifs_sb_info *); |
| 368 | /* open, rename and delete file */ |
| 369 | int (*rename_pending_delete)(const char *, struct dentry *, |
| 370 | const unsigned int); |
| 371 | /* send rename request */ |
| 372 | int (*rename)(const unsigned int, struct cifs_tcon *, const char *, |
| 373 | const char *, struct cifs_sb_info *); |
| 374 | /* send create hardlink request */ |
| 375 | int (*create_hardlink)(const unsigned int, struct cifs_tcon *, |
| 376 | const char *, const char *, |
| 377 | struct cifs_sb_info *); |
| 378 | /* query symlink target */ |
| 379 | int (*query_symlink)(const unsigned int, struct cifs_tcon *, |
| 380 | struct cifs_sb_info *, const char *, |
| 381 | char **, bool); |
| 382 | /* open a file for non-posix mounts */ |
| 383 | int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, |
| 384 | void *buf); |
| 385 | /* set fid protocol-specific info */ |
| 386 | void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); |
| 387 | /* close a file */ |
| 388 | void (*close)(const unsigned int, struct cifs_tcon *, |
| 389 | struct cifs_fid *); |
| 390 | /* close a file, returning file attributes and timestamps */ |
| 391 | void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, |
| 392 | struct cifsFileInfo *pfile_info); |
| 393 | /* send a flush request to the server */ |
| 394 | int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); |
| 395 | /* async read from the server */ |
| 396 | int (*async_readv)(struct cifs_readdata *); |
| 397 | /* async write to the server */ |
| 398 | int (*async_writev)(struct cifs_writedata *, |
| 399 | void (*release)(struct kref *)); |
| 400 | /* sync read from the server */ |
| 401 | int (*sync_read)(const unsigned int, struct cifs_fid *, |
| 402 | struct cifs_io_parms *, unsigned int *, char **, |
| 403 | int *); |
| 404 | /* sync write to the server */ |
| 405 | int (*sync_write)(const unsigned int, struct cifs_fid *, |
| 406 | struct cifs_io_parms *, unsigned int *, struct kvec *, |
| 407 | unsigned long); |
| 408 | /* open dir, start readdir */ |
| 409 | int (*query_dir_first)(const unsigned int, struct cifs_tcon *, |
| 410 | const char *, struct cifs_sb_info *, |
| 411 | struct cifs_fid *, __u16, |
| 412 | struct cifs_search_info *); |
| 413 | /* continue readdir */ |
| 414 | int (*query_dir_next)(const unsigned int, struct cifs_tcon *, |
| 415 | struct cifs_fid *, |
| 416 | __u16, struct cifs_search_info *srch_inf); |
| 417 | /* close dir */ |
| 418 | int (*close_dir)(const unsigned int, struct cifs_tcon *, |
| 419 | struct cifs_fid *); |
| 420 | /* calculate a size of SMB message */ |
| 421 | unsigned int (*calc_smb_size)(void *buf); |
| 422 | /* check for STATUS_PENDING and process the response if yes */ |
| 423 | bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); |
| 424 | /* check for STATUS_NETWORK_SESSION_EXPIRED */ |
| 425 | bool (*is_session_expired)(char *); |
| 426 | /* send oplock break response */ |
| 427 | int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *, |
| 428 | struct cifsInodeInfo *); |
| 429 | /* query remote filesystem */ |
| 430 | int (*queryfs)(const unsigned int, struct cifs_tcon *, |
| 431 | struct cifs_sb_info *, struct kstatfs *); |
| 432 | /* send mandatory brlock to the server */ |
| 433 | int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, |
| 434 | __u64, __u32, int, int, bool); |
| 435 | /* unlock range of mandatory locks */ |
| 436 | int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, |
| 437 | const unsigned int); |
| 438 | /* push brlocks from the cache to the server */ |
| 439 | int (*push_mand_locks)(struct cifsFileInfo *); |
| 440 | /* get lease key of the inode */ |
| 441 | void (*get_lease_key)(struct inode *, struct cifs_fid *); |
| 442 | /* set lease key of the inode */ |
| 443 | void (*set_lease_key)(struct inode *, struct cifs_fid *); |
| 444 | /* generate new lease key */ |
| 445 | void (*new_lease_key)(struct cifs_fid *); |
| 446 | int (*generate_signingkey)(struct cifs_ses *ses, |
| 447 | struct TCP_Server_Info *server); |
| 448 | int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, |
| 449 | bool allocate_crypto); |
| 450 | int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, |
| 451 | struct cifsFileInfo *src_file); |
| 452 | int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, |
| 453 | struct cifsFileInfo *src_file, void __user *); |
| 454 | int (*notify)(const unsigned int xid, struct file *pfile, |
| 455 | void __user *pbuf, bool return_changes); |
| 456 | int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, |
| 457 | struct cifs_sb_info *, const unsigned char *, |
| 458 | char *, unsigned int *); |
| 459 | int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, |
| 460 | struct cifs_sb_info *, const unsigned char *, |
| 461 | char *, unsigned int *); |
| 462 | /* if we can do cache read operations */ |
| 463 | bool (*is_read_op)(__u32); |
| 464 | /* set oplock level for the inode */ |
| 465 | void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, |
| 466 | bool *); |
| 467 | /* create lease context buffer for CREATE request */ |
| 468 | char * (*create_lease_buf)(u8 *lease_key, u8 oplock); |
| 469 | /* parse lease context buffer and return oplock/epoch info */ |
| 470 | __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); |
| 471 | ssize_t (*copychunk_range)(const unsigned int, |
| 472 | struct cifsFileInfo *src_file, |
| 473 | struct cifsFileInfo *target_file, |
| 474 | u64 src_off, u64 len, u64 dest_off); |
| 475 | int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, |
| 476 | struct cifsFileInfo *target_file, u64 src_off, u64 len, |
| 477 | u64 dest_off); |
| 478 | int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); |
| 479 | ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, |
| 480 | const unsigned char *, const unsigned char *, char *, |
| 481 | size_t, struct cifs_sb_info *); |
| 482 | int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, |
| 483 | const char *, const void *, const __u16, |
| 484 | const struct nls_table *, struct cifs_sb_info *); |
| 485 | struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, |
| 486 | const char *, u32 *, u32); |
| 487 | struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, |
| 488 | const struct cifs_fid *, u32 *, u32); |
| 489 | int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, |
| 490 | int); |
| 491 | /* writepages retry size */ |
| 492 | unsigned int (*wp_retry_size)(struct inode *); |
| 493 | /* get mtu credits */ |
| 494 | int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, |
| 495 | unsigned int *, struct cifs_credits *); |
| 496 | /* adjust previously taken mtu credits to request size */ |
| 497 | int (*adjust_credits)(struct TCP_Server_Info *server, |
| 498 | struct cifs_credits *credits, |
| 499 | const unsigned int payload_size); |
| 500 | /* check if we need to issue closedir */ |
| 501 | bool (*dir_needs_close)(struct cifsFileInfo *); |
| 502 | long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, |
| 503 | loff_t); |
| 504 | /* init transform request - used for encryption for now */ |
| 505 | int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, |
| 506 | struct smb_rqst *, struct smb_rqst *); |
| 507 | int (*is_transform_hdr)(void *buf); |
| 508 | int (*receive_transform)(struct TCP_Server_Info *, |
| 509 | struct mid_q_entry **, char **, int *); |
| 510 | enum securityEnum (*select_sectype)(struct TCP_Server_Info *, |
| 511 | enum securityEnum); |
| 512 | int (*next_header)(char *); |
| 513 | /* ioctl passthrough for query_info */ |
| 514 | int (*ioctl_query_info)(const unsigned int xid, |
| 515 | struct cifs_tcon *tcon, |
| 516 | struct cifs_sb_info *cifs_sb, |
| 517 | __le16 *path, int is_dir, |
| 518 | unsigned long p); |
| 519 | /* make unix special files (block, char, fifo, socket) */ |
| 520 | int (*make_node)(unsigned int xid, |
| 521 | struct inode *inode, |
| 522 | struct dentry *dentry, |
| 523 | struct cifs_tcon *tcon, |
| 524 | const char *full_path, |
| 525 | umode_t mode, |
| 526 | dev_t device_number); |
| 527 | /* version specific fiemap implementation */ |
| 528 | int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, |
| 529 | struct fiemap_extent_info *, u64, u64); |
| 530 | /* version specific llseek implementation */ |
| 531 | loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); |
| 532 | /* Check for STATUS_IO_TIMEOUT */ |
| 533 | bool (*is_status_io_timeout)(char *buf); |
| 534 | /* Check for STATUS_NETWORK_NAME_DELETED */ |
| 535 | void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); |
| 536 | }; |
| 537 | |
| 538 | struct smb_version_values { |
| 539 | char *version_string; |
| 540 | __u16 protocol_id; |
| 541 | __u32 req_capabilities; |
| 542 | __u32 large_lock_type; |
| 543 | __u32 exclusive_lock_type; |
| 544 | __u32 shared_lock_type; |
| 545 | __u32 unlock_lock_type; |
| 546 | size_t header_preamble_size; |
| 547 | size_t header_size; |
| 548 | size_t max_header_size; |
| 549 | size_t read_rsp_size; |
| 550 | __le16 lock_cmd; |
| 551 | unsigned int cap_unix; |
| 552 | unsigned int cap_nt_find; |
| 553 | unsigned int cap_large_files; |
| 554 | __u16 signing_enabled; |
| 555 | __u16 signing_required; |
| 556 | size_t create_lease_size; |
| 557 | }; |
| 558 | |
| 559 | #define HEADER_SIZE(server) (server->vals->header_size) |
| 560 | #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) |
| 561 | #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) |
| 562 | #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) |
| 563 | |
| 564 | /** |
| 565 | * CIFS superblock mount flags (mnt_cifs_flags) to consider when |
| 566 | * trying to reuse existing superblock for a new mount |
| 567 | */ |
| 568 | #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ |
| 569 | CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ |
| 570 | CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ |
| 571 | CIFS_MOUNT_MAP_SFM_CHR | \ |
| 572 | CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ |
| 573 | CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ |
| 574 | CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ |
| 575 | CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ |
| 576 | CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ |
| 577 | CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ |
| 578 | CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ |
| 579 | CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ |
| 580 | CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ |
| 581 | CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) |
| 582 | |
| 583 | /** |
| 584 | * Generic VFS superblock mount flags (s_flags) to consider when |
| 585 | * trying to reuse existing superblock for a new mount |
| 586 | */ |
| 587 | #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ |
| 588 | SB_NODEV | SB_SYNCHRONOUS) |
| 589 | |
| 590 | struct cifs_mnt_data { |
| 591 | struct cifs_sb_info *cifs_sb; |
| 592 | struct smb3_fs_context *ctx; |
| 593 | int flags; |
| 594 | }; |
| 595 | |
| 596 | static inline unsigned int |
| 597 | get_rfc1002_length(void *buf) |
| 598 | { |
| 599 | return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; |
| 600 | } |
| 601 | |
| 602 | static inline void |
| 603 | inc_rfc1001_len(void *buf, int count) |
| 604 | { |
| 605 | be32_add_cpu((__be32 *)buf, count); |
| 606 | } |
| 607 | |
| 608 | struct TCP_Server_Info { |
| 609 | struct list_head tcp_ses_list; |
| 610 | struct list_head smb_ses_list; |
| 611 | spinlock_t srv_lock; /* protect anything here that is not protected */ |
| 612 | __u64 conn_id; /* connection identifier (useful for debugging) */ |
| 613 | int srv_count; /* reference counter */ |
| 614 | /* 15 character server name + 0x20 16th byte indicating type = srv */ |
| 615 | char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; |
| 616 | struct smb_version_operations *ops; |
| 617 | struct smb_version_values *vals; |
| 618 | /* updates to tcpStatus protected by cifs_tcp_ses_lock */ |
| 619 | enum statusEnum tcpStatus; /* what we think the status is */ |
| 620 | char *hostname; /* hostname portion of UNC string */ |
| 621 | struct socket *ssocket; |
| 622 | struct sockaddr_storage dstaddr; |
| 623 | struct sockaddr_storage srcaddr; /* locally bind to this IP */ |
| 624 | #ifdef CONFIG_NET_NS |
| 625 | struct net *net; |
| 626 | #endif |
| 627 | wait_queue_head_t response_q; |
| 628 | wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ |
| 629 | spinlock_t mid_lock; /* protect mid queue and it's entries */ |
| 630 | struct list_head pending_mid_q; |
| 631 | bool noblocksnd; /* use blocking sendmsg */ |
| 632 | bool noautotune; /* do not autotune send buf sizes */ |
| 633 | bool nosharesock; |
| 634 | bool tcp_nodelay; |
| 635 | unsigned int credits; /* send no more requests at once */ |
| 636 | unsigned int max_credits; /* can override large 32000 default at mnt */ |
| 637 | unsigned int in_flight; /* number of requests on the wire to server */ |
| 638 | unsigned int max_in_flight; /* max number of requests that were on wire */ |
| 639 | spinlock_t req_lock; /* protect the two values above */ |
| 640 | struct mutex _srv_mutex; |
| 641 | unsigned int nofs_flag; |
| 642 | struct task_struct *tsk; |
| 643 | char server_GUID[16]; |
| 644 | __u16 sec_mode; |
| 645 | bool sign; /* is signing enabled on this connection? */ |
| 646 | bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ |
| 647 | bool session_estab; /* mark when very first sess is established */ |
| 648 | int echo_credits; /* echo reserved slots */ |
| 649 | int oplock_credits; /* oplock break reserved slots */ |
| 650 | bool echoes:1; /* enable echoes */ |
| 651 | __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ |
| 652 | u16 dialect; /* dialect index that server chose */ |
| 653 | bool oplocks:1; /* enable oplocks */ |
| 654 | unsigned int maxReq; /* Clients should submit no more */ |
| 655 | /* than maxReq distinct unanswered SMBs to the server when using */ |
| 656 | /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ |
| 657 | unsigned int maxBuf; /* maxBuf specifies the maximum */ |
| 658 | /* message size the server can send or receive for non-raw SMBs */ |
| 659 | /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ |
| 660 | /* when socket is setup (and during reconnect) before NegProt sent */ |
| 661 | unsigned int max_rw; /* maxRw specifies the maximum */ |
| 662 | /* message size the server can send or receive for */ |
| 663 | /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ |
| 664 | unsigned int capabilities; /* selective disabling of caps by smb sess */ |
| 665 | int timeAdj; /* Adjust for difference in server time zone in sec */ |
| 666 | __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ |
| 667 | char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ |
| 668 | /* 16th byte of RFC1001 workstation name is always null */ |
| 669 | char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; |
| 670 | __u32 sequence_number; /* for signing, protected by srv_mutex */ |
| 671 | __u32 reconnect_instance; /* incremented on each reconnect */ |
| 672 | struct session_key session_key; |
| 673 | unsigned long lstrp; /* when we got last response from this server */ |
| 674 | struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ |
| 675 | #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ |
| 676 | #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ |
| 677 | char negflavor; /* NEGOTIATE response flavor */ |
| 678 | /* extended security flavors that server supports */ |
| 679 | bool sec_ntlmssp; /* supports NTLMSSP */ |
| 680 | bool sec_kerberosu2u; /* supports U2U Kerberos */ |
| 681 | bool sec_kerberos; /* supports plain Kerberos */ |
| 682 | bool sec_mskerberos; /* supports legacy MS Kerberos */ |
| 683 | bool large_buf; /* is current buffer large? */ |
| 684 | /* use SMBD connection instead of socket */ |
| 685 | bool rdma; |
| 686 | /* point to the SMBD connection if RDMA is used instead of socket */ |
| 687 | struct smbd_connection *smbd_conn; |
| 688 | struct delayed_work echo; /* echo ping workqueue job */ |
| 689 | char *smallbuf; /* pointer to current "small" buffer */ |
| 690 | char *bigbuf; /* pointer to current "big" buffer */ |
| 691 | /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ |
| 692 | unsigned int pdu_size; |
| 693 | unsigned int total_read; /* total amount of data read in this pass */ |
| 694 | atomic_t in_send; /* requests trying to send */ |
| 695 | atomic_t num_waiters; /* blocked waiting to get in sendrecv */ |
| 696 | #ifdef CONFIG_CIFS_STATS2 |
| 697 | atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ |
| 698 | atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ |
| 699 | __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ |
| 700 | __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; |
| 701 | __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; |
| 702 | #endif /* STATS2 */ |
| 703 | unsigned int max_read; |
| 704 | unsigned int max_write; |
| 705 | unsigned int min_offload; |
| 706 | __le16 compress_algorithm; |
| 707 | __u16 signing_algorithm; |
| 708 | __le16 cipher_type; |
| 709 | /* save initital negprot hash */ |
| 710 | __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; |
| 711 | bool signing_negotiated; /* true if valid signing context rcvd from server */ |
| 712 | bool posix_ext_supported; |
| 713 | struct delayed_work reconnect; /* reconnect workqueue job */ |
| 714 | struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ |
| 715 | unsigned long echo_interval; |
| 716 | |
| 717 | /* |
| 718 | * Number of targets available for reconnect. The more targets |
| 719 | * the more tasks have to wait to let the demultiplex thread |
| 720 | * reconnect. |
| 721 | */ |
| 722 | int nr_targets; |
| 723 | bool noblockcnt; /* use non-blocking connect() */ |
| 724 | |
| 725 | /* |
| 726 | * If this is a session channel, |
| 727 | * primary_server holds the ref-counted |
| 728 | * pointer to primary channel connection for the session. |
| 729 | */ |
| 730 | #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server) |
| 731 | struct TCP_Server_Info *primary_server; |
| 732 | |
| 733 | #ifdef CONFIG_CIFS_SWN_UPCALL |
| 734 | bool use_swn_dstaddr; |
| 735 | struct sockaddr_storage swn_dstaddr; |
| 736 | #endif |
| 737 | struct mutex refpath_lock; /* protects leaf_fullpath */ |
| 738 | /* |
| 739 | * Canonical DFS full paths that were used to chase referrals in mount and reconnect. |
| 740 | * |
| 741 | * origin_fullpath: first or original referral path |
| 742 | * leaf_fullpath: last referral path (might be changed due to nested links in reconnect) |
| 743 | * |
| 744 | * current_fullpath: pointer to either origin_fullpath or leaf_fullpath |
| 745 | * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect() |
| 746 | * |
| 747 | * format: \\HOST\SHARE\[OPTIONAL PATH] |
| 748 | */ |
| 749 | char *origin_fullpath, *leaf_fullpath, *current_fullpath; |
| 750 | }; |
| 751 | |
| 752 | static inline bool is_smb1(struct TCP_Server_Info *server) |
| 753 | { |
| 754 | return HEADER_PREAMBLE_SIZE(server) != 0; |
| 755 | } |
| 756 | |
| 757 | static inline void cifs_server_lock(struct TCP_Server_Info *server) |
| 758 | { |
| 759 | unsigned int nofs_flag = memalloc_nofs_save(); |
| 760 | |
| 761 | mutex_lock(&server->_srv_mutex); |
| 762 | server->nofs_flag = nofs_flag; |
| 763 | } |
| 764 | |
| 765 | static inline void cifs_server_unlock(struct TCP_Server_Info *server) |
| 766 | { |
| 767 | unsigned int nofs_flag = server->nofs_flag; |
| 768 | |
| 769 | mutex_unlock(&server->_srv_mutex); |
| 770 | memalloc_nofs_restore(nofs_flag); |
| 771 | } |
| 772 | |
| 773 | struct cifs_credits { |
| 774 | unsigned int value; |
| 775 | unsigned int instance; |
| 776 | }; |
| 777 | |
| 778 | static inline unsigned int |
| 779 | in_flight(struct TCP_Server_Info *server) |
| 780 | { |
| 781 | unsigned int num; |
| 782 | |
| 783 | spin_lock(&server->req_lock); |
| 784 | num = server->in_flight; |
| 785 | spin_unlock(&server->req_lock); |
| 786 | return num; |
| 787 | } |
| 788 | |
| 789 | static inline bool |
| 790 | has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) |
| 791 | { |
| 792 | int num; |
| 793 | |
| 794 | spin_lock(&server->req_lock); |
| 795 | num = *credits; |
| 796 | spin_unlock(&server->req_lock); |
| 797 | return num >= num_credits; |
| 798 | } |
| 799 | |
| 800 | static inline void |
| 801 | add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, |
| 802 | const int optype) |
| 803 | { |
| 804 | server->ops->add_credits(server, credits, optype); |
| 805 | } |
| 806 | |
| 807 | static inline void |
| 808 | add_credits_and_wake_if(struct TCP_Server_Info *server, |
| 809 | const struct cifs_credits *credits, const int optype) |
| 810 | { |
| 811 | if (credits->value) { |
| 812 | server->ops->add_credits(server, credits, optype); |
| 813 | wake_up(&server->request_q); |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | static inline void |
| 818 | set_credits(struct TCP_Server_Info *server, const int val) |
| 819 | { |
| 820 | server->ops->set_credits(server, val); |
| 821 | } |
| 822 | |
| 823 | static inline int |
| 824 | adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, |
| 825 | const unsigned int payload_size) |
| 826 | { |
| 827 | return server->ops->adjust_credits ? |
| 828 | server->ops->adjust_credits(server, credits, payload_size) : 0; |
| 829 | } |
| 830 | |
| 831 | static inline __le64 |
| 832 | get_next_mid64(struct TCP_Server_Info *server) |
| 833 | { |
| 834 | return cpu_to_le64(server->ops->get_next_mid(server)); |
| 835 | } |
| 836 | |
| 837 | static inline __le16 |
| 838 | get_next_mid(struct TCP_Server_Info *server) |
| 839 | { |
| 840 | __u16 mid = server->ops->get_next_mid(server); |
| 841 | /* |
| 842 | * The value in the SMB header should be little endian for easy |
| 843 | * on-the-wire decoding. |
| 844 | */ |
| 845 | return cpu_to_le16(mid); |
| 846 | } |
| 847 | |
| 848 | static inline void |
| 849 | revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) |
| 850 | { |
| 851 | if (server->ops->revert_current_mid) |
| 852 | server->ops->revert_current_mid(server, val); |
| 853 | } |
| 854 | |
| 855 | static inline void |
| 856 | revert_current_mid_from_hdr(struct TCP_Server_Info *server, |
| 857 | const struct smb2_hdr *shdr) |
| 858 | { |
| 859 | unsigned int num = le16_to_cpu(shdr->CreditCharge); |
| 860 | |
| 861 | return revert_current_mid(server, num > 0 ? num : 1); |
| 862 | } |
| 863 | |
| 864 | static inline __u16 |
| 865 | get_mid(const struct smb_hdr *smb) |
| 866 | { |
| 867 | return le16_to_cpu(smb->Mid); |
| 868 | } |
| 869 | |
| 870 | static inline bool |
| 871 | compare_mid(__u16 mid, const struct smb_hdr *smb) |
| 872 | { |
| 873 | return mid == le16_to_cpu(smb->Mid); |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * When the server supports very large reads and writes via POSIX extensions, |
| 878 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not |
| 879 | * including the RFC1001 length. |
| 880 | * |
| 881 | * Note that this might make for "interesting" allocation problems during |
| 882 | * writeback however as we have to allocate an array of pointers for the |
| 883 | * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. |
| 884 | * |
| 885 | * For reads, there is a similar problem as we need to allocate an array |
| 886 | * of kvecs to handle the receive, though that should only need to be done |
| 887 | * once. |
| 888 | */ |
| 889 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
| 890 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
| 891 | |
| 892 | /* |
| 893 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
| 894 | * of 2^17-1 minus the size of the call header. That allows for a read or |
| 895 | * write up to the maximum size described by RFC1002. |
| 896 | */ |
| 897 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
| 898 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
| 899 | |
| 900 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
| 901 | |
| 902 | /* |
| 903 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
| 904 | * those values when posix extensions aren't in force. In actuality here, we |
| 905 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem |
| 906 | * to be ok with the extra byte even though Windows doesn't send writes that |
| 907 | * are that large. |
| 908 | * |
| 909 | * Citation: |
| 910 | * |
| 911 | * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx |
| 912 | */ |
| 913 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) |
| 914 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
| 915 | |
| 916 | /* |
| 917 | * Macros to allow the TCP_Server_Info->net field and related code to drop out |
| 918 | * when CONFIG_NET_NS isn't set. |
| 919 | */ |
| 920 | |
| 921 | #ifdef CONFIG_NET_NS |
| 922 | |
| 923 | static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) |
| 924 | { |
| 925 | return srv->net; |
| 926 | } |
| 927 | |
| 928 | static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) |
| 929 | { |
| 930 | srv->net = net; |
| 931 | } |
| 932 | |
| 933 | #else |
| 934 | |
| 935 | static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) |
| 936 | { |
| 937 | return &init_net; |
| 938 | } |
| 939 | |
| 940 | static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) |
| 941 | { |
| 942 | } |
| 943 | |
| 944 | #endif |
| 945 | |
| 946 | struct cifs_server_iface { |
| 947 | struct list_head iface_head; |
| 948 | struct kref refcount; |
| 949 | size_t speed; |
| 950 | unsigned int rdma_capable : 1; |
| 951 | unsigned int rss_capable : 1; |
| 952 | unsigned int is_active : 1; /* unset if non existent */ |
| 953 | struct sockaddr_storage sockaddr; |
| 954 | }; |
| 955 | |
| 956 | /* release iface when last ref is dropped */ |
| 957 | static inline void |
| 958 | release_iface(struct kref *ref) |
| 959 | { |
| 960 | struct cifs_server_iface *iface = container_of(ref, |
| 961 | struct cifs_server_iface, |
| 962 | refcount); |
| 963 | list_del_init(&iface->iface_head); |
| 964 | kfree(iface); |
| 965 | } |
| 966 | |
| 967 | /* |
| 968 | * compare two interfaces a and b |
| 969 | * return 0 if everything matches. |
| 970 | * return 1 if a has higher link speed, or rdma capable, or rss capable |
| 971 | * return -1 otherwise. |
| 972 | */ |
| 973 | static inline int |
| 974 | iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) |
| 975 | { |
| 976 | int cmp_ret = 0; |
| 977 | |
| 978 | WARN_ON(!a || !b); |
| 979 | if (a->speed == b->speed) { |
| 980 | if (a->rdma_capable == b->rdma_capable) { |
| 981 | if (a->rss_capable == b->rss_capable) { |
| 982 | cmp_ret = memcmp(&a->sockaddr, &b->sockaddr, |
| 983 | sizeof(a->sockaddr)); |
| 984 | if (!cmp_ret) |
| 985 | return 0; |
| 986 | else if (cmp_ret > 0) |
| 987 | return 1; |
| 988 | else |
| 989 | return -1; |
| 990 | } else if (a->rss_capable > b->rss_capable) |
| 991 | return 1; |
| 992 | else |
| 993 | return -1; |
| 994 | } else if (a->rdma_capable > b->rdma_capable) |
| 995 | return 1; |
| 996 | else |
| 997 | return -1; |
| 998 | } else if (a->speed > b->speed) |
| 999 | return 1; |
| 1000 | else |
| 1001 | return -1; |
| 1002 | } |
| 1003 | |
| 1004 | struct cifs_chan { |
| 1005 | unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ |
| 1006 | struct TCP_Server_Info *server; |
| 1007 | struct cifs_server_iface *iface; /* interface in use */ |
| 1008 | __u8 signkey[SMB3_SIGN_KEY_SIZE]; |
| 1009 | }; |
| 1010 | |
| 1011 | /* |
| 1012 | * Session structure. One of these for each uid session with a particular host |
| 1013 | */ |
| 1014 | struct cifs_ses { |
| 1015 | struct list_head smb_ses_list; |
| 1016 | struct list_head rlist; /* reconnect list */ |
| 1017 | struct list_head tcon_list; |
| 1018 | struct cifs_tcon *tcon_ipc; |
| 1019 | spinlock_t ses_lock; /* protect anything here that is not protected */ |
| 1020 | struct mutex session_mutex; |
| 1021 | struct TCP_Server_Info *server; /* pointer to server info */ |
| 1022 | int ses_count; /* reference counter */ |
| 1023 | enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ |
| 1024 | unsigned int overrideSecFlg; /* if non-zero override global sec flags */ |
| 1025 | char *serverOS; /* name of operating system underlying server */ |
| 1026 | char *serverNOS; /* name of network operating system of server */ |
| 1027 | char *serverDomain; /* security realm of server */ |
| 1028 | __u64 Suid; /* remote smb uid */ |
| 1029 | kuid_t linux_uid; /* overriding owner of files on the mount */ |
| 1030 | kuid_t cred_uid; /* owner of credentials */ |
| 1031 | unsigned int capabilities; |
| 1032 | char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ |
| 1033 | char *user_name; /* must not be null except during init of sess |
| 1034 | and after mount option parsing we fill it */ |
| 1035 | char *domainName; |
| 1036 | char *password; |
| 1037 | char workstation_name[CIFS_MAX_WORKSTATION_LEN]; |
| 1038 | struct session_key auth_key; |
| 1039 | struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ |
| 1040 | enum securityEnum sectype; /* what security flavor was specified? */ |
| 1041 | bool sign; /* is signing required? */ |
| 1042 | bool domainAuto:1; |
| 1043 | __u16 session_flags; |
| 1044 | __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; |
| 1045 | __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; |
| 1046 | __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; |
| 1047 | __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; |
| 1048 | |
| 1049 | /* |
| 1050 | * Network interfaces available on the server this session is |
| 1051 | * connected to. |
| 1052 | * |
| 1053 | * Other channels can be opened by connecting and binding this |
| 1054 | * session to interfaces from this list. |
| 1055 | * |
| 1056 | * iface_lock should be taken when accessing any of these fields |
| 1057 | */ |
| 1058 | spinlock_t iface_lock; |
| 1059 | /* ========= begin: protected by iface_lock ======== */ |
| 1060 | struct list_head iface_list; |
| 1061 | size_t iface_count; |
| 1062 | unsigned long iface_last_update; /* jiffies */ |
| 1063 | /* ========= end: protected by iface_lock ======== */ |
| 1064 | |
| 1065 | spinlock_t chan_lock; |
| 1066 | /* ========= begin: protected by chan_lock ======== */ |
| 1067 | #define CIFS_MAX_CHANNELS 16 |
| 1068 | #define CIFS_ALL_CHANNELS_SET(ses) \ |
| 1069 | ((1UL << (ses)->chan_count) - 1) |
| 1070 | #define CIFS_ALL_CHANS_GOOD(ses) \ |
| 1071 | (!(ses)->chans_need_reconnect) |
| 1072 | #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ |
| 1073 | ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) |
| 1074 | #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ |
| 1075 | ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) |
| 1076 | #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ |
| 1077 | test_bit((index), &(ses)->chans_need_reconnect) |
| 1078 | #define CIFS_CHAN_IN_RECONNECT(ses, index) \ |
| 1079 | ((ses)->chans[(index)].in_reconnect) |
| 1080 | |
| 1081 | struct cifs_chan chans[CIFS_MAX_CHANNELS]; |
| 1082 | size_t chan_count; |
| 1083 | size_t chan_max; |
| 1084 | atomic_t chan_seq; /* round robin state */ |
| 1085 | |
| 1086 | /* |
| 1087 | * chans_need_reconnect is a bitmap indicating which of the channels |
| 1088 | * under this smb session needs to be reconnected. |
| 1089 | * If not multichannel session, only one bit will be used. |
| 1090 | * |
| 1091 | * We will ask for sess and tcon reconnection only if all the |
| 1092 | * channels are marked for needing reconnection. This will |
| 1093 | * enable the sessions on top to continue to live till any |
| 1094 | * of the channels below are active. |
| 1095 | */ |
| 1096 | unsigned long chans_need_reconnect; |
| 1097 | /* ========= end: protected by chan_lock ======== */ |
| 1098 | struct cifs_ses *dfs_root_ses; |
| 1099 | }; |
| 1100 | |
| 1101 | static inline bool |
| 1102 | cap_unix(struct cifs_ses *ses) |
| 1103 | { |
| 1104 | return ses->server->vals->cap_unix & ses->capabilities; |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * common struct for holding inode info when searching for or updating an |
| 1109 | * inode with new info |
| 1110 | */ |
| 1111 | |
| 1112 | #define CIFS_FATTR_DFS_REFERRAL 0x1 |
| 1113 | #define CIFS_FATTR_DELETE_PENDING 0x2 |
| 1114 | #define CIFS_FATTR_NEED_REVAL 0x4 |
| 1115 | #define CIFS_FATTR_INO_COLLISION 0x8 |
| 1116 | #define CIFS_FATTR_UNKNOWN_NLINK 0x10 |
| 1117 | #define CIFS_FATTR_FAKE_ROOT_INO 0x20 |
| 1118 | |
| 1119 | struct cifs_fattr { |
| 1120 | u32 cf_flags; |
| 1121 | u32 cf_cifsattrs; |
| 1122 | u64 cf_uniqueid; |
| 1123 | u64 cf_eof; |
| 1124 | u64 cf_bytes; |
| 1125 | u64 cf_createtime; |
| 1126 | kuid_t cf_uid; |
| 1127 | kgid_t cf_gid; |
| 1128 | umode_t cf_mode; |
| 1129 | dev_t cf_rdev; |
| 1130 | unsigned int cf_nlink; |
| 1131 | unsigned int cf_dtype; |
| 1132 | struct timespec64 cf_atime; |
| 1133 | struct timespec64 cf_mtime; |
| 1134 | struct timespec64 cf_ctime; |
| 1135 | u32 cf_cifstag; |
| 1136 | char *cf_symlink_target; |
| 1137 | }; |
| 1138 | |
| 1139 | /* |
| 1140 | * there is one of these for each connection to a resource on a particular |
| 1141 | * session |
| 1142 | */ |
| 1143 | struct cifs_tcon { |
| 1144 | struct list_head tcon_list; |
| 1145 | int tc_count; |
| 1146 | struct list_head rlist; /* reconnect list */ |
| 1147 | spinlock_t tc_lock; /* protect anything here that is not protected */ |
| 1148 | atomic_t num_local_opens; /* num of all opens including disconnected */ |
| 1149 | atomic_t num_remote_opens; /* num of all network opens on server */ |
| 1150 | struct list_head openFileList; |
| 1151 | spinlock_t open_file_lock; /* protects list above */ |
| 1152 | struct cifs_ses *ses; /* pointer to session associated with */ |
| 1153 | char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ |
| 1154 | char *nativeFileSystem; |
| 1155 | char *password; /* for share-level security */ |
| 1156 | __u32 tid; /* The 4 byte tree id */ |
| 1157 | __u16 Flags; /* optional support bits */ |
| 1158 | enum tid_status_enum status; |
| 1159 | atomic_t num_smbs_sent; |
| 1160 | union { |
| 1161 | struct { |
| 1162 | atomic_t num_writes; |
| 1163 | atomic_t num_reads; |
| 1164 | atomic_t num_flushes; |
| 1165 | atomic_t num_oplock_brks; |
| 1166 | atomic_t num_opens; |
| 1167 | atomic_t num_closes; |
| 1168 | atomic_t num_deletes; |
| 1169 | atomic_t num_mkdirs; |
| 1170 | atomic_t num_posixopens; |
| 1171 | atomic_t num_posixmkdirs; |
| 1172 | atomic_t num_rmdirs; |
| 1173 | atomic_t num_renames; |
| 1174 | atomic_t num_t2renames; |
| 1175 | atomic_t num_ffirst; |
| 1176 | atomic_t num_fnext; |
| 1177 | atomic_t num_fclose; |
| 1178 | atomic_t num_hardlinks; |
| 1179 | atomic_t num_symlinks; |
| 1180 | atomic_t num_locks; |
| 1181 | atomic_t num_acl_get; |
| 1182 | atomic_t num_acl_set; |
| 1183 | } cifs_stats; |
| 1184 | struct { |
| 1185 | atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; |
| 1186 | atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; |
| 1187 | } smb2_stats; |
| 1188 | } stats; |
| 1189 | __u64 bytes_read; |
| 1190 | __u64 bytes_written; |
| 1191 | spinlock_t stat_lock; /* protects the two fields above */ |
| 1192 | FILE_SYSTEM_DEVICE_INFO fsDevInfo; |
| 1193 | FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ |
| 1194 | FILE_SYSTEM_UNIX_INFO fsUnixInfo; |
| 1195 | bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ |
| 1196 | bool pipe:1; /* set if connection to pipe share */ |
| 1197 | bool print:1; /* set if connection to printer share */ |
| 1198 | bool retry:1; |
| 1199 | bool nocase:1; |
| 1200 | bool nohandlecache:1; /* if strange server resource prob can turn off */ |
| 1201 | bool nodelete:1; |
| 1202 | bool seal:1; /* transport encryption for this mounted share */ |
| 1203 | bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol |
| 1204 | for this mount even if server would support */ |
| 1205 | bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ |
| 1206 | bool local_lease:1; /* check leases (only) on local system not remote */ |
| 1207 | bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ |
| 1208 | bool broken_sparse_sup; /* if server or share does not support sparse */ |
| 1209 | bool need_reconnect:1; /* connection reset, tid now invalid */ |
| 1210 | bool need_reopen_files:1; /* need to reopen tcon file handles */ |
| 1211 | bool use_resilient:1; /* use resilient instead of durable handles */ |
| 1212 | bool use_persistent:1; /* use persistent instead of durable handles */ |
| 1213 | bool no_lease:1; /* Do not request leases on files or directories */ |
| 1214 | bool use_witness:1; /* use witness protocol */ |
| 1215 | __le32 capabilities; |
| 1216 | __u32 share_flags; |
| 1217 | __u32 maximal_access; |
| 1218 | __u32 vol_serial_number; |
| 1219 | __le64 vol_create_time; |
| 1220 | __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ |
| 1221 | __u32 handle_timeout; /* persistent and durable handle timeout in ms */ |
| 1222 | __u32 ss_flags; /* sector size flags */ |
| 1223 | __u32 perf_sector_size; /* best sector size for perf */ |
| 1224 | __u32 max_chunks; |
| 1225 | __u32 max_bytes_chunk; |
| 1226 | __u32 max_bytes_copy; |
| 1227 | #ifdef CONFIG_CIFS_FSCACHE |
| 1228 | u64 resource_id; /* server resource id */ |
| 1229 | struct fscache_volume *fscache; /* cookie for share */ |
| 1230 | #endif |
| 1231 | struct list_head pending_opens; /* list of incomplete opens */ |
| 1232 | struct cached_fids *cfids; |
| 1233 | /* BB add field for back pointer to sb struct(s)? */ |
| 1234 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 1235 | struct list_head ulist; /* cache update list */ |
| 1236 | struct list_head dfs_ses_list; |
| 1237 | #endif |
| 1238 | struct delayed_work query_interfaces; /* query interfaces workqueue job */ |
| 1239 | }; |
| 1240 | |
| 1241 | /* |
| 1242 | * This is a refcounted and timestamped container for a tcon pointer. The |
| 1243 | * container holds a tcon reference. It is considered safe to free one of |
| 1244 | * these when the tl_count goes to 0. The tl_time is the time of the last |
| 1245 | * "get" on the container. |
| 1246 | */ |
| 1247 | struct tcon_link { |
| 1248 | struct rb_node tl_rbnode; |
| 1249 | kuid_t tl_uid; |
| 1250 | unsigned long tl_flags; |
| 1251 | #define TCON_LINK_MASTER 0 |
| 1252 | #define TCON_LINK_PENDING 1 |
| 1253 | #define TCON_LINK_IN_TREE 2 |
| 1254 | unsigned long tl_time; |
| 1255 | atomic_t tl_count; |
| 1256 | struct cifs_tcon *tl_tcon; |
| 1257 | }; |
| 1258 | |
| 1259 | extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); |
| 1260 | extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); |
| 1261 | |
| 1262 | static inline struct cifs_tcon * |
| 1263 | tlink_tcon(struct tcon_link *tlink) |
| 1264 | { |
| 1265 | return tlink->tl_tcon; |
| 1266 | } |
| 1267 | |
| 1268 | static inline struct tcon_link * |
| 1269 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| 1270 | { |
| 1271 | return cifs_sb->master_tlink; |
| 1272 | } |
| 1273 | |
| 1274 | extern void cifs_put_tlink(struct tcon_link *tlink); |
| 1275 | |
| 1276 | static inline struct tcon_link * |
| 1277 | cifs_get_tlink(struct tcon_link *tlink) |
| 1278 | { |
| 1279 | if (tlink && !IS_ERR(tlink)) |
| 1280 | atomic_inc(&tlink->tl_count); |
| 1281 | return tlink; |
| 1282 | } |
| 1283 | |
| 1284 | /* This function is always expected to succeed */ |
| 1285 | extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); |
| 1286 | |
| 1287 | #define CIFS_OPLOCK_NO_CHANGE 0xfe |
| 1288 | |
| 1289 | struct cifs_pending_open { |
| 1290 | struct list_head olist; |
| 1291 | struct tcon_link *tlink; |
| 1292 | __u8 lease_key[16]; |
| 1293 | __u32 oplock; |
| 1294 | }; |
| 1295 | |
| 1296 | struct cifs_deferred_close { |
| 1297 | struct list_head dlist; |
| 1298 | struct tcon_link *tlink; |
| 1299 | __u16 netfid; |
| 1300 | __u64 persistent_fid; |
| 1301 | __u64 volatile_fid; |
| 1302 | }; |
| 1303 | |
| 1304 | /* |
| 1305 | * This info hangs off the cifsFileInfo structure, pointed to by llist. |
| 1306 | * This is used to track byte stream locks on the file |
| 1307 | */ |
| 1308 | struct cifsLockInfo { |
| 1309 | struct list_head llist; /* pointer to next cifsLockInfo */ |
| 1310 | struct list_head blist; /* pointer to locks blocked on this */ |
| 1311 | wait_queue_head_t block_q; |
| 1312 | __u64 offset; |
| 1313 | __u64 length; |
| 1314 | __u32 pid; |
| 1315 | __u16 type; |
| 1316 | __u16 flags; |
| 1317 | }; |
| 1318 | |
| 1319 | /* |
| 1320 | * One of these for each open instance of a file |
| 1321 | */ |
| 1322 | struct cifs_search_info { |
| 1323 | loff_t index_of_last_entry; |
| 1324 | __u16 entries_in_buffer; |
| 1325 | __u16 info_level; |
| 1326 | __u32 resume_key; |
| 1327 | char *ntwrk_buf_start; |
| 1328 | char *srch_entries_start; |
| 1329 | char *last_entry; |
| 1330 | const char *presume_name; |
| 1331 | unsigned int resume_name_len; |
| 1332 | bool endOfSearch:1; |
| 1333 | bool emptyDir:1; |
| 1334 | bool unicode:1; |
| 1335 | bool smallBuf:1; /* so we know which buf_release function to call */ |
| 1336 | }; |
| 1337 | |
| 1338 | #define ACL_NO_MODE ((umode_t)(-1)) |
| 1339 | struct cifs_open_parms { |
| 1340 | struct cifs_tcon *tcon; |
| 1341 | struct cifs_sb_info *cifs_sb; |
| 1342 | int disposition; |
| 1343 | int desired_access; |
| 1344 | int create_options; |
| 1345 | const char *path; |
| 1346 | struct cifs_fid *fid; |
| 1347 | umode_t mode; |
| 1348 | bool reconnect:1; |
| 1349 | }; |
| 1350 | |
| 1351 | struct cifs_fid { |
| 1352 | __u16 netfid; |
| 1353 | __u64 persistent_fid; /* persist file id for smb2 */ |
| 1354 | __u64 volatile_fid; /* volatile file id for smb2 */ |
| 1355 | __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ |
| 1356 | __u8 create_guid[16]; |
| 1357 | __u32 access; |
| 1358 | struct cifs_pending_open *pending_open; |
| 1359 | unsigned int epoch; |
| 1360 | #ifdef CONFIG_CIFS_DEBUG2 |
| 1361 | __u64 mid; |
| 1362 | #endif /* CIFS_DEBUG2 */ |
| 1363 | bool purge_cache; |
| 1364 | }; |
| 1365 | |
| 1366 | struct cifs_fid_locks { |
| 1367 | struct list_head llist; |
| 1368 | struct cifsFileInfo *cfile; /* fid that owns locks */ |
| 1369 | struct list_head locks; /* locks held by fid above */ |
| 1370 | }; |
| 1371 | |
| 1372 | struct cifsFileInfo { |
| 1373 | /* following two lists are protected by tcon->open_file_lock */ |
| 1374 | struct list_head tlist; /* pointer to next fid owned by tcon */ |
| 1375 | struct list_head flist; /* next fid (file instance) for this inode */ |
| 1376 | /* lock list below protected by cifsi->lock_sem */ |
| 1377 | struct cifs_fid_locks *llist; /* brlocks held by this fid */ |
| 1378 | kuid_t uid; /* allows finding which FileInfo structure */ |
| 1379 | __u32 pid; /* process id who opened file */ |
| 1380 | struct cifs_fid fid; /* file id from remote */ |
| 1381 | struct list_head rlist; /* reconnect list */ |
| 1382 | /* BB add lock scope info here if needed */ |
| 1383 | /* lock scope id (0 if none) */ |
| 1384 | struct dentry *dentry; |
| 1385 | struct tcon_link *tlink; |
| 1386 | unsigned int f_flags; |
| 1387 | bool invalidHandle:1; /* file closed via session abend */ |
| 1388 | bool swapfile:1; |
| 1389 | bool oplock_break_cancelled:1; |
| 1390 | unsigned int oplock_epoch; /* epoch from the lease break */ |
| 1391 | __u32 oplock_level; /* oplock/lease level from the lease break */ |
| 1392 | int count; |
| 1393 | spinlock_t file_info_lock; /* protects four flag/count fields above */ |
| 1394 | struct mutex fh_mutex; /* prevents reopen race after dead ses*/ |
| 1395 | struct cifs_search_info srch_inf; |
| 1396 | struct work_struct oplock_break; /* work for oplock breaks */ |
| 1397 | struct work_struct put; /* work for the final part of _put */ |
| 1398 | struct delayed_work deferred; |
| 1399 | bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ |
| 1400 | char *symlink_target; |
| 1401 | }; |
| 1402 | |
| 1403 | struct cifs_io_parms { |
| 1404 | __u16 netfid; |
| 1405 | __u64 persistent_fid; /* persist file id for smb2 */ |
| 1406 | __u64 volatile_fid; /* volatile file id for smb2 */ |
| 1407 | __u32 pid; |
| 1408 | __u64 offset; |
| 1409 | unsigned int length; |
| 1410 | struct cifs_tcon *tcon; |
| 1411 | struct TCP_Server_Info *server; |
| 1412 | }; |
| 1413 | |
| 1414 | struct cifs_aio_ctx { |
| 1415 | struct kref refcount; |
| 1416 | struct list_head list; |
| 1417 | struct mutex aio_mutex; |
| 1418 | struct completion done; |
| 1419 | struct iov_iter iter; |
| 1420 | struct kiocb *iocb; |
| 1421 | struct cifsFileInfo *cfile; |
| 1422 | struct bio_vec *bv; |
| 1423 | loff_t pos; |
| 1424 | unsigned int nr_pinned_pages; |
| 1425 | ssize_t rc; |
| 1426 | unsigned int len; |
| 1427 | unsigned int total_len; |
| 1428 | unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ |
| 1429 | bool should_dirty; |
| 1430 | /* |
| 1431 | * Indicates if this aio_ctx is for direct_io, |
| 1432 | * If yes, iter is a copy of the user passed iov_iter |
| 1433 | */ |
| 1434 | bool direct_io; |
| 1435 | }; |
| 1436 | |
| 1437 | /* asynchronous read support */ |
| 1438 | struct cifs_readdata { |
| 1439 | struct kref refcount; |
| 1440 | struct list_head list; |
| 1441 | struct completion done; |
| 1442 | struct cifsFileInfo *cfile; |
| 1443 | struct address_space *mapping; |
| 1444 | struct cifs_aio_ctx *ctx; |
| 1445 | __u64 offset; |
| 1446 | ssize_t got_bytes; |
| 1447 | unsigned int bytes; |
| 1448 | pid_t pid; |
| 1449 | int result; |
| 1450 | struct work_struct work; |
| 1451 | struct iov_iter iter; |
| 1452 | struct kvec iov[2]; |
| 1453 | struct TCP_Server_Info *server; |
| 1454 | #ifdef CONFIG_CIFS_SMB_DIRECT |
| 1455 | struct smbd_mr *mr; |
| 1456 | #endif |
| 1457 | struct cifs_credits credits; |
| 1458 | }; |
| 1459 | |
| 1460 | /* asynchronous write support */ |
| 1461 | struct cifs_writedata { |
| 1462 | struct kref refcount; |
| 1463 | struct list_head list; |
| 1464 | struct completion done; |
| 1465 | enum writeback_sync_modes sync_mode; |
| 1466 | struct work_struct work; |
| 1467 | struct cifsFileInfo *cfile; |
| 1468 | struct cifs_aio_ctx *ctx; |
| 1469 | struct iov_iter iter; |
| 1470 | struct bio_vec *bv; |
| 1471 | __u64 offset; |
| 1472 | pid_t pid; |
| 1473 | unsigned int bytes; |
| 1474 | int result; |
| 1475 | struct TCP_Server_Info *server; |
| 1476 | #ifdef CONFIG_CIFS_SMB_DIRECT |
| 1477 | struct smbd_mr *mr; |
| 1478 | #endif |
| 1479 | struct cifs_credits credits; |
| 1480 | }; |
| 1481 | |
| 1482 | /* |
| 1483 | * Take a reference on the file private data. Must be called with |
| 1484 | * cfile->file_info_lock held. |
| 1485 | */ |
| 1486 | static inline void |
| 1487 | cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) |
| 1488 | { |
| 1489 | ++cifs_file->count; |
| 1490 | } |
| 1491 | |
| 1492 | struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); |
| 1493 | void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, |
| 1494 | bool offload); |
| 1495 | void cifsFileInfo_put(struct cifsFileInfo *cifs_file); |
| 1496 | |
| 1497 | #define CIFS_CACHE_READ_FLG 1 |
| 1498 | #define CIFS_CACHE_HANDLE_FLG 2 |
| 1499 | #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) |
| 1500 | #define CIFS_CACHE_WRITE_FLG 4 |
| 1501 | #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) |
| 1502 | #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) |
| 1503 | |
| 1504 | #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)) |
| 1505 | #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) |
| 1506 | #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)) |
| 1507 | |
| 1508 | /* |
| 1509 | * One of these for each file inode |
| 1510 | */ |
| 1511 | |
| 1512 | struct cifsInodeInfo { |
| 1513 | struct netfs_inode netfs; /* Netfslib context and vfs inode */ |
| 1514 | bool can_cache_brlcks; |
| 1515 | struct list_head llist; /* locks helb by this inode */ |
| 1516 | /* |
| 1517 | * NOTE: Some code paths call down_read(lock_sem) twice, so |
| 1518 | * we must always use cifs_down_write() instead of down_write() |
| 1519 | * for this semaphore to avoid deadlocks. |
| 1520 | */ |
| 1521 | struct rw_semaphore lock_sem; /* protect the fields above */ |
| 1522 | /* BB add in lists for dirty pages i.e. write caching info for oplock */ |
| 1523 | struct list_head openFileList; |
| 1524 | spinlock_t open_file_lock; /* protects openFileList */ |
| 1525 | __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ |
| 1526 | unsigned int oplock; /* oplock/lease level we have */ |
| 1527 | unsigned int epoch; /* used to track lease state changes */ |
| 1528 | #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ |
| 1529 | #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ |
| 1530 | #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ |
| 1531 | #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ |
| 1532 | #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ |
| 1533 | #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ |
| 1534 | #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ |
| 1535 | #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ |
| 1536 | unsigned long flags; |
| 1537 | spinlock_t writers_lock; |
| 1538 | unsigned int writers; /* Number of writers on this inode */ |
| 1539 | unsigned long time; /* jiffies of last update of inode */ |
| 1540 | u64 server_eof; /* current file size on server -- protected by i_lock */ |
| 1541 | u64 uniqueid; /* server inode number */ |
| 1542 | u64 createtime; /* creation time on server */ |
| 1543 | __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ |
| 1544 | struct list_head deferred_closes; /* list of deferred closes */ |
| 1545 | spinlock_t deferred_lock; /* protection on deferred list */ |
| 1546 | bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ |
| 1547 | char *symlink_target; |
| 1548 | }; |
| 1549 | |
| 1550 | static inline struct cifsInodeInfo * |
| 1551 | CIFS_I(struct inode *inode) |
| 1552 | { |
| 1553 | return container_of(inode, struct cifsInodeInfo, netfs.inode); |
| 1554 | } |
| 1555 | |
| 1556 | static inline struct cifs_sb_info * |
| 1557 | CIFS_SB(struct super_block *sb) |
| 1558 | { |
| 1559 | return sb->s_fs_info; |
| 1560 | } |
| 1561 | |
| 1562 | static inline struct cifs_sb_info * |
| 1563 | CIFS_FILE_SB(struct file *file) |
| 1564 | { |
| 1565 | return CIFS_SB(file_inode(file)->i_sb); |
| 1566 | } |
| 1567 | |
| 1568 | static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) |
| 1569 | { |
| 1570 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
| 1571 | return '/'; |
| 1572 | else |
| 1573 | return '\\'; |
| 1574 | } |
| 1575 | |
| 1576 | static inline void |
| 1577 | convert_delimiter(char *path, char delim) |
| 1578 | { |
| 1579 | char old_delim, *pos; |
| 1580 | |
| 1581 | if (delim == '/') |
| 1582 | old_delim = '\\'; |
| 1583 | else |
| 1584 | old_delim = '/'; |
| 1585 | |
| 1586 | pos = path; |
| 1587 | while ((pos = strchr(pos, old_delim))) |
| 1588 | *pos = delim; |
| 1589 | } |
| 1590 | |
| 1591 | #define cifs_stats_inc atomic_inc |
| 1592 | |
| 1593 | static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, |
| 1594 | unsigned int bytes) |
| 1595 | { |
| 1596 | if (bytes) { |
| 1597 | spin_lock(&tcon->stat_lock); |
| 1598 | tcon->bytes_written += bytes; |
| 1599 | spin_unlock(&tcon->stat_lock); |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, |
| 1604 | unsigned int bytes) |
| 1605 | { |
| 1606 | spin_lock(&tcon->stat_lock); |
| 1607 | tcon->bytes_read += bytes; |
| 1608 | spin_unlock(&tcon->stat_lock); |
| 1609 | } |
| 1610 | |
| 1611 | |
| 1612 | /* |
| 1613 | * This is the prototype for the mid receive function. This function is for |
| 1614 | * receiving the rest of the SMB frame, starting with the WordCount (which is |
| 1615 | * just after the MID in struct smb_hdr). Note: |
| 1616 | * |
| 1617 | * - This will be called by cifsd, with no locks held. |
| 1618 | * - The mid will still be on the pending_mid_q. |
| 1619 | * - mid->resp_buf will point to the current buffer. |
| 1620 | * |
| 1621 | * Returns zero on a successful receive, or an error. The receive state in |
| 1622 | * the TCP_Server_Info will also be updated. |
| 1623 | */ |
| 1624 | typedef int (mid_receive_t)(struct TCP_Server_Info *server, |
| 1625 | struct mid_q_entry *mid); |
| 1626 | |
| 1627 | /* |
| 1628 | * This is the prototype for the mid callback function. This is called once the |
| 1629 | * mid has been received off of the socket. When creating one, take special |
| 1630 | * care to avoid deadlocks. Things to bear in mind: |
| 1631 | * |
| 1632 | * - it will be called by cifsd, with no locks held |
| 1633 | * - the mid will be removed from any lists |
| 1634 | */ |
| 1635 | typedef void (mid_callback_t)(struct mid_q_entry *mid); |
| 1636 | |
| 1637 | /* |
| 1638 | * This is the protopyte for mid handle function. This is called once the mid |
| 1639 | * has been recognized after decryption of the message. |
| 1640 | */ |
| 1641 | typedef int (mid_handle_t)(struct TCP_Server_Info *server, |
| 1642 | struct mid_q_entry *mid); |
| 1643 | |
| 1644 | /* one of these for every pending CIFS request to the server */ |
| 1645 | struct mid_q_entry { |
| 1646 | struct list_head qhead; /* mids waiting on reply from this server */ |
| 1647 | struct kref refcount; |
| 1648 | struct TCP_Server_Info *server; /* server corresponding to this mid */ |
| 1649 | __u64 mid; /* multiplex id */ |
| 1650 | __u16 credits; /* number of credits consumed by this mid */ |
| 1651 | __u16 credits_received; /* number of credits from the response */ |
| 1652 | __u32 pid; /* process id */ |
| 1653 | __u32 sequence_number; /* for CIFS signing */ |
| 1654 | unsigned long when_alloc; /* when mid was created */ |
| 1655 | #ifdef CONFIG_CIFS_STATS2 |
| 1656 | unsigned long when_sent; /* time when smb send finished */ |
| 1657 | unsigned long when_received; /* when demux complete (taken off wire) */ |
| 1658 | #endif |
| 1659 | mid_receive_t *receive; /* call receive callback */ |
| 1660 | mid_callback_t *callback; /* call completion callback */ |
| 1661 | mid_handle_t *handle; /* call handle mid callback */ |
| 1662 | void *callback_data; /* general purpose pointer for callback */ |
| 1663 | struct task_struct *creator; |
| 1664 | void *resp_buf; /* pointer to received SMB header */ |
| 1665 | unsigned int resp_buf_size; |
| 1666 | int mid_state; /* wish this were enum but can not pass to wait_event */ |
| 1667 | unsigned int mid_flags; |
| 1668 | __le16 command; /* smb command code */ |
| 1669 | unsigned int optype; /* operation type */ |
| 1670 | bool large_buf:1; /* if valid response, is pointer to large buf */ |
| 1671 | bool multiRsp:1; /* multiple trans2 responses for one request */ |
| 1672 | bool multiEnd:1; /* both received */ |
| 1673 | bool decrypted:1; /* decrypted entry */ |
| 1674 | }; |
| 1675 | |
| 1676 | struct close_cancelled_open { |
| 1677 | struct cifs_fid fid; |
| 1678 | struct cifs_tcon *tcon; |
| 1679 | struct work_struct work; |
| 1680 | __u64 mid; |
| 1681 | __u16 cmd; |
| 1682 | }; |
| 1683 | |
| 1684 | /* Make code in transport.c a little cleaner by moving |
| 1685 | update of optional stats into function below */ |
| 1686 | static inline void cifs_in_send_inc(struct TCP_Server_Info *server) |
| 1687 | { |
| 1688 | atomic_inc(&server->in_send); |
| 1689 | } |
| 1690 | |
| 1691 | static inline void cifs_in_send_dec(struct TCP_Server_Info *server) |
| 1692 | { |
| 1693 | atomic_dec(&server->in_send); |
| 1694 | } |
| 1695 | |
| 1696 | static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) |
| 1697 | { |
| 1698 | atomic_inc(&server->num_waiters); |
| 1699 | } |
| 1700 | |
| 1701 | static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) |
| 1702 | { |
| 1703 | atomic_dec(&server->num_waiters); |
| 1704 | } |
| 1705 | |
| 1706 | #ifdef CONFIG_CIFS_STATS2 |
| 1707 | static inline void cifs_save_when_sent(struct mid_q_entry *mid) |
| 1708 | { |
| 1709 | mid->when_sent = jiffies; |
| 1710 | } |
| 1711 | #else |
| 1712 | static inline void cifs_save_when_sent(struct mid_q_entry *mid) |
| 1713 | { |
| 1714 | } |
| 1715 | #endif |
| 1716 | |
| 1717 | /* for pending dnotify requests */ |
| 1718 | struct dir_notify_req { |
| 1719 | struct list_head lhead; |
| 1720 | __le16 Pid; |
| 1721 | __le16 PidHigh; |
| 1722 | __u16 Mid; |
| 1723 | __u16 Tid; |
| 1724 | __u16 Uid; |
| 1725 | __u16 netfid; |
| 1726 | __u32 filter; /* CompletionFilter (for multishot) */ |
| 1727 | int multishot; |
| 1728 | struct file *pfile; |
| 1729 | }; |
| 1730 | |
| 1731 | struct dfs_info3_param { |
| 1732 | int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ |
| 1733 | int path_consumed; |
| 1734 | int server_type; |
| 1735 | int ref_flag; |
| 1736 | char *path_name; |
| 1737 | char *node_name; |
| 1738 | int ttl; |
| 1739 | }; |
| 1740 | |
| 1741 | struct file_list { |
| 1742 | struct list_head list; |
| 1743 | struct cifsFileInfo *cfile; |
| 1744 | }; |
| 1745 | |
| 1746 | struct cifs_mount_ctx { |
| 1747 | struct cifs_sb_info *cifs_sb; |
| 1748 | struct smb3_fs_context *fs_ctx; |
| 1749 | unsigned int xid; |
| 1750 | struct TCP_Server_Info *server; |
| 1751 | struct cifs_ses *ses; |
| 1752 | struct cifs_tcon *tcon; |
| 1753 | char *origin_fullpath, *leaf_fullpath; |
| 1754 | struct list_head dfs_ses_list; |
| 1755 | }; |
| 1756 | |
| 1757 | static inline void free_dfs_info_param(struct dfs_info3_param *param) |
| 1758 | { |
| 1759 | if (param) { |
| 1760 | kfree(param->path_name); |
| 1761 | kfree(param->node_name); |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | static inline void free_dfs_info_array(struct dfs_info3_param *param, |
| 1766 | int number_of_items) |
| 1767 | { |
| 1768 | int i; |
| 1769 | |
| 1770 | if ((number_of_items == 0) || (param == NULL)) |
| 1771 | return; |
| 1772 | for (i = 0; i < number_of_items; i++) { |
| 1773 | kfree(param[i].path_name); |
| 1774 | kfree(param[i].node_name); |
| 1775 | } |
| 1776 | kfree(param); |
| 1777 | } |
| 1778 | |
| 1779 | static inline bool is_interrupt_error(int error) |
| 1780 | { |
| 1781 | switch (error) { |
| 1782 | case -EINTR: |
| 1783 | case -ERESTARTSYS: |
| 1784 | case -ERESTARTNOHAND: |
| 1785 | case -ERESTARTNOINTR: |
| 1786 | return true; |
| 1787 | } |
| 1788 | return false; |
| 1789 | } |
| 1790 | |
| 1791 | static inline bool is_retryable_error(int error) |
| 1792 | { |
| 1793 | if (is_interrupt_error(error) || error == -EAGAIN) |
| 1794 | return true; |
| 1795 | return false; |
| 1796 | } |
| 1797 | |
| 1798 | |
| 1799 | /* cifs_get_writable_file() flags */ |
| 1800 | #define FIND_WR_ANY 0 |
| 1801 | #define FIND_WR_FSUID_ONLY 1 |
| 1802 | #define FIND_WR_WITH_DELETE 2 |
| 1803 | |
| 1804 | #define MID_FREE 0 |
| 1805 | #define MID_REQUEST_ALLOCATED 1 |
| 1806 | #define MID_REQUEST_SUBMITTED 2 |
| 1807 | #define MID_RESPONSE_RECEIVED 4 |
| 1808 | #define MID_RETRY_NEEDED 8 /* session closed while this request out */ |
| 1809 | #define MID_RESPONSE_MALFORMED 0x10 |
| 1810 | #define MID_SHUTDOWN 0x20 |
| 1811 | |
| 1812 | /* Flags */ |
| 1813 | #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ |
| 1814 | #define MID_DELETED 2 /* Mid has been dequeued/deleted */ |
| 1815 | |
| 1816 | /* Types of response buffer returned from SendReceive2 */ |
| 1817 | #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ |
| 1818 | #define CIFS_SMALL_BUFFER 1 |
| 1819 | #define CIFS_LARGE_BUFFER 2 |
| 1820 | #define CIFS_IOVEC 4 /* array of response buffers */ |
| 1821 | |
| 1822 | /* Type of Request to SendReceive2 */ |
| 1823 | #define CIFS_BLOCKING_OP 1 /* operation can block */ |
| 1824 | #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ |
| 1825 | #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ |
| 1826 | #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ |
| 1827 | #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ |
| 1828 | #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ |
| 1829 | |
| 1830 | /* Type of request operation */ |
| 1831 | #define CIFS_ECHO_OP 0x080 /* echo request */ |
| 1832 | #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ |
| 1833 | #define CIFS_NEG_OP 0x0200 /* negotiate request */ |
| 1834 | #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ |
| 1835 | /* Lower bitmask values are reserved by others below. */ |
| 1836 | #define CIFS_SESS_OP 0x2000 /* session setup request */ |
| 1837 | #define CIFS_OP_MASK 0x2780 /* mask request type */ |
| 1838 | |
| 1839 | #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ |
| 1840 | #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ |
| 1841 | #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ |
| 1842 | |
| 1843 | /* Security Flags: indicate type of session setup needed */ |
| 1844 | #define CIFSSEC_MAY_SIGN 0x00001 |
| 1845 | #define CIFSSEC_MAY_NTLMV2 0x00004 |
| 1846 | #define CIFSSEC_MAY_KRB5 0x00008 |
| 1847 | #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ |
| 1848 | #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ |
| 1849 | |
| 1850 | #define CIFSSEC_MUST_SIGN 0x01001 |
| 1851 | /* note that only one of the following can be set so the |
| 1852 | result of setting MUST flags more than once will be to |
| 1853 | require use of the stronger protocol */ |
| 1854 | #define CIFSSEC_MUST_NTLMV2 0x04004 |
| 1855 | #define CIFSSEC_MUST_KRB5 0x08008 |
| 1856 | #ifdef CONFIG_CIFS_UPCALL |
| 1857 | #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ |
| 1858 | #else |
| 1859 | #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ |
| 1860 | #endif /* UPCALL */ |
| 1861 | #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ |
| 1862 | #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ |
| 1863 | |
| 1864 | #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) |
| 1865 | #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) |
| 1866 | #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) |
| 1867 | /* |
| 1868 | ***************************************************************** |
| 1869 | * All constants go here |
| 1870 | ***************************************************************** |
| 1871 | */ |
| 1872 | |
| 1873 | #define UID_HASH (16) |
| 1874 | |
| 1875 | /* |
| 1876 | * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the |
| 1877 | * following to be declared. |
| 1878 | */ |
| 1879 | |
| 1880 | /**************************************************************************** |
| 1881 | * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according |
| 1882 | * to the locking order. i.e. if two locks are to be held together, the lock that |
| 1883 | * appears higher in this list needs to be taken before the other. |
| 1884 | * |
| 1885 | * If you hold a lock that is lower in this list, and you need to take a higher lock |
| 1886 | * (or if you think that one of the functions that you're calling may need to), first |
| 1887 | * drop the lock you hold, pick up the higher lock, then the lower one. This will |
| 1888 | * ensure that locks are picked up only in one direction in the below table |
| 1889 | * (top to bottom). |
| 1890 | * |
| 1891 | * Also, if you expect a function to be called with a lock held, explicitly document |
| 1892 | * this in the comments on top of your function definition. |
| 1893 | * |
| 1894 | * And also, try to keep the critical sections (lock hold time) to be as minimal as |
| 1895 | * possible. Blocking / calling other functions with a lock held always increase |
| 1896 | * the risk of a possible deadlock. |
| 1897 | * |
| 1898 | * Following this rule will avoid unnecessary deadlocks, which can get really hard to |
| 1899 | * debug. Also, any new lock that you introduce, please add to this list in the correct |
| 1900 | * order. |
| 1901 | * |
| 1902 | * Please populate this list whenever you introduce new locks in your changes. Or in |
| 1903 | * case I've missed some existing locks. Please ensure that it's added in the list |
| 1904 | * based on the locking order expected. |
| 1905 | * |
| 1906 | * ===================================================================================== |
| 1907 | * Lock Protects Initialization fn |
| 1908 | * ===================================================================================== |
| 1909 | * vol_list_lock |
| 1910 | * vol_info->ctx_lock vol_info->ctx |
| 1911 | * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb |
| 1912 | * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session |
| 1913 | * reconnect_mutex |
| 1914 | * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session |
| 1915 | * cifs_ses->session_mutex cifs_ses sesInfoAlloc |
| 1916 | * cifs_tcon |
| 1917 | * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc |
| 1918 | * cifs_tcon->pending_opens |
| 1919 | * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc |
| 1920 | * cifs_tcon->bytes_written |
| 1921 | * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc |
| 1922 | * GlobalMid_Lock GlobalMaxActiveXid init_cifs |
| 1923 | * GlobalCurrentXid |
| 1924 | * GlobalTotalActiveXid |
| 1925 | * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) |
| 1926 | * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session |
| 1927 | * ->CurrentMid |
| 1928 | * (any changes in mid_q_entry fields) |
| 1929 | * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session |
| 1930 | * ->credits |
| 1931 | * ->echo_credits |
| 1932 | * ->oplock_credits |
| 1933 | * ->reconnect_instance |
| 1934 | * cifs_ses->ses_lock (anything that is not protected by another lock and can change) |
| 1935 | * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc |
| 1936 | * ->iface_count |
| 1937 | * ->iface_last_update |
| 1938 | * cifs_ses->chan_lock cifs_ses->chans |
| 1939 | * ->chans_need_reconnect |
| 1940 | * ->chans_in_reconnect |
| 1941 | * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) |
| 1942 | * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode |
| 1943 | * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc |
| 1944 | * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once |
| 1945 | * ->can_cache_brlcks |
| 1946 | * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc |
| 1947 | * cached_fid->fid_mutex cifs_tcon->crfid tconInfoAlloc |
| 1948 | * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo |
| 1949 | * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo |
| 1950 | * ->invalidHandle initiate_cifs_search |
| 1951 | * ->oplock_break_cancelled |
| 1952 | * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc |
| 1953 | ****************************************************************************/ |
| 1954 | |
| 1955 | #ifdef DECLARE_GLOBALS_HERE |
| 1956 | #define GLOBAL_EXTERN |
| 1957 | #else |
| 1958 | #define GLOBAL_EXTERN extern |
| 1959 | #endif |
| 1960 | |
| 1961 | /* |
| 1962 | * the list of TCP_Server_Info structures, ie each of the sockets |
| 1963 | * connecting our client to a distinct server (ip address), is |
| 1964 | * chained together by cifs_tcp_ses_list. The list of all our SMB |
| 1965 | * sessions (and from that the tree connections) can be found |
| 1966 | * by iterating over cifs_tcp_ses_list |
| 1967 | */ |
| 1968 | extern struct list_head cifs_tcp_ses_list; |
| 1969 | |
| 1970 | /* |
| 1971 | * This lock protects the cifs_tcp_ses_list, the list of smb sessions per |
| 1972 | * tcp session, and the list of tcon's per smb session. It also protects |
| 1973 | * the reference counters for the server, smb session, and tcon. |
| 1974 | * generally the locks should be taken in order tcp_ses_lock before |
| 1975 | * tcon->open_file_lock and that before file->file_info_lock since the |
| 1976 | * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file |
| 1977 | */ |
| 1978 | extern spinlock_t cifs_tcp_ses_lock; |
| 1979 | |
| 1980 | /* |
| 1981 | * Global transaction id (XID) information |
| 1982 | */ |
| 1983 | extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ |
| 1984 | extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ |
| 1985 | extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ |
| 1986 | extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ |
| 1987 | |
| 1988 | /* |
| 1989 | * Global counters, updated atomically |
| 1990 | */ |
| 1991 | extern atomic_t sesInfoAllocCount; |
| 1992 | extern atomic_t tconInfoAllocCount; |
| 1993 | extern atomic_t tcpSesNextId; |
| 1994 | extern atomic_t tcpSesAllocCount; |
| 1995 | extern atomic_t tcpSesReconnectCount; |
| 1996 | extern atomic_t tconInfoReconnectCount; |
| 1997 | |
| 1998 | /* Various Debug counters */ |
| 1999 | extern atomic_t buf_alloc_count; /* current number allocated */ |
| 2000 | extern atomic_t small_buf_alloc_count; |
| 2001 | #ifdef CONFIG_CIFS_STATS2 |
| 2002 | extern atomic_t total_buf_alloc_count; /* total allocated over all time */ |
| 2003 | extern atomic_t total_small_buf_alloc_count; |
| 2004 | extern unsigned int slow_rsp_threshold; /* number of secs before logging */ |
| 2005 | #endif |
| 2006 | |
| 2007 | /* Misc globals */ |
| 2008 | extern bool enable_oplocks; /* enable or disable oplocks */ |
| 2009 | extern bool lookupCacheEnabled; |
| 2010 | extern unsigned int global_secflags; /* if on, session setup sent |
| 2011 | with more secure ntlmssp2 challenge/resp */ |
| 2012 | extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ |
| 2013 | extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ |
| 2014 | extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ |
| 2015 | extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ |
| 2016 | extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ |
| 2017 | extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ |
| 2018 | extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ |
| 2019 | extern unsigned int cifs_min_small; /* min size of small buf pool */ |
| 2020 | extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ |
| 2021 | extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ |
| 2022 | extern atomic_t mid_count; |
| 2023 | |
| 2024 | void cifs_oplock_break(struct work_struct *work); |
| 2025 | void cifs_queue_oplock_break(struct cifsFileInfo *cfile); |
| 2026 | void smb2_deferred_work_close(struct work_struct *work); |
| 2027 | |
| 2028 | extern const struct slow_work_ops cifs_oplock_break_ops; |
| 2029 | extern struct workqueue_struct *cifsiod_wq; |
| 2030 | extern struct workqueue_struct *decrypt_wq; |
| 2031 | extern struct workqueue_struct *fileinfo_put_wq; |
| 2032 | extern struct workqueue_struct *cifsoplockd_wq; |
| 2033 | extern struct workqueue_struct *deferredclose_wq; |
| 2034 | extern __u32 cifs_lock_secret; |
| 2035 | |
| 2036 | extern mempool_t *cifs_mid_poolp; |
| 2037 | |
| 2038 | /* Operations for different SMB versions */ |
| 2039 | #define SMB1_VERSION_STRING "1.0" |
| 2040 | #define SMB20_VERSION_STRING "2.0" |
| 2041 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
| 2042 | extern struct smb_version_operations smb1_operations; |
| 2043 | extern struct smb_version_values smb1_values; |
| 2044 | extern struct smb_version_operations smb20_operations; |
| 2045 | extern struct smb_version_values smb20_values; |
| 2046 | #endif /* CIFS_ALLOW_INSECURE_LEGACY */ |
| 2047 | #define SMB21_VERSION_STRING "2.1" |
| 2048 | extern struct smb_version_operations smb21_operations; |
| 2049 | extern struct smb_version_values smb21_values; |
| 2050 | #define SMBDEFAULT_VERSION_STRING "default" |
| 2051 | extern struct smb_version_values smbdefault_values; |
| 2052 | #define SMB3ANY_VERSION_STRING "3" |
| 2053 | extern struct smb_version_values smb3any_values; |
| 2054 | #define SMB30_VERSION_STRING "3.0" |
| 2055 | extern struct smb_version_operations smb30_operations; |
| 2056 | extern struct smb_version_values smb30_values; |
| 2057 | #define SMB302_VERSION_STRING "3.02" |
| 2058 | #define ALT_SMB302_VERSION_STRING "3.0.2" |
| 2059 | /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ |
| 2060 | extern struct smb_version_values smb302_values; |
| 2061 | #define SMB311_VERSION_STRING "3.1.1" |
| 2062 | #define ALT_SMB311_VERSION_STRING "3.11" |
| 2063 | extern struct smb_version_operations smb311_operations; |
| 2064 | extern struct smb_version_values smb311_values; |
| 2065 | |
| 2066 | static inline char *get_security_type_str(enum securityEnum sectype) |
| 2067 | { |
| 2068 | switch (sectype) { |
| 2069 | case RawNTLMSSP: |
| 2070 | return "RawNTLMSSP"; |
| 2071 | case Kerberos: |
| 2072 | return "Kerberos"; |
| 2073 | case NTLMv2: |
| 2074 | return "NTLMv2"; |
| 2075 | default: |
| 2076 | return "Unknown"; |
| 2077 | } |
| 2078 | } |
| 2079 | |
| 2080 | static inline bool is_smb1_server(struct TCP_Server_Info *server) |
| 2081 | { |
| 2082 | return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; |
| 2083 | } |
| 2084 | |
| 2085 | static inline bool is_tcon_dfs(struct cifs_tcon *tcon) |
| 2086 | { |
| 2087 | /* |
| 2088 | * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS |
| 2089 | * Subsystem Notifies That a Share Is a DFS Share. |
| 2090 | * |
| 2091 | * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server |
| 2092 | * Application Updates a Share. |
| 2093 | */ |
| 2094 | if (!tcon || !tcon->ses || !tcon->ses->server) |
| 2095 | return false; |
| 2096 | return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : |
| 2097 | tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); |
| 2098 | } |
| 2099 | |
| 2100 | static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, |
| 2101 | const struct dfs_info3_param *ref) |
| 2102 | { |
| 2103 | /* |
| 2104 | * Check if all targets are capable of handling DFS referrals as per |
| 2105 | * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. |
| 2106 | */ |
| 2107 | return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); |
| 2108 | } |
| 2109 | |
| 2110 | static inline u64 cifs_flock_len(const struct file_lock *fl) |
| 2111 | { |
| 2112 | return (u64)fl->fl_end - fl->fl_start + 1; |
| 2113 | } |
| 2114 | |
| 2115 | static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) |
| 2116 | { |
| 2117 | if (WARN_ON_ONCE(!ses || !ses->server)) |
| 2118 | return 0; |
| 2119 | /* |
| 2120 | * Make workstation name no more than 15 chars when using insecure dialects as some legacy |
| 2121 | * servers do require it during NTLMSSP. |
| 2122 | */ |
| 2123 | if (ses->server->dialect <= SMB20_PROT_ID) |
| 2124 | return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); |
| 2125 | return sizeof(ses->workstation_name); |
| 2126 | } |
| 2127 | |
| 2128 | static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) |
| 2129 | { |
| 2130 | memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); |
| 2131 | dst->AccessFlags = src->AccessFlags; |
| 2132 | dst->CurrentByteOffset = src->CurrentByteOffset; |
| 2133 | dst->Mode = src->Mode; |
| 2134 | dst->AlignmentRequirement = src->AlignmentRequirement; |
| 2135 | dst->FileNameLength = src->FileNameLength; |
| 2136 | } |
| 2137 | |
| 2138 | static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, |
| 2139 | int num_rqst, |
| 2140 | const u8 *sig) |
| 2141 | { |
| 2142 | unsigned int len, skip; |
| 2143 | unsigned int nents = 0; |
| 2144 | unsigned long addr; |
| 2145 | int i, j; |
| 2146 | |
| 2147 | /* |
| 2148 | * The first rqst has a transform header where the first 20 bytes are |
| 2149 | * not part of the encrypted blob. |
| 2150 | */ |
| 2151 | skip = 20; |
| 2152 | |
| 2153 | /* Assumes the first rqst has a transform header as the first iov. |
| 2154 | * I.e. |
| 2155 | * rqst[0].rq_iov[0] is transform header |
| 2156 | * rqst[0].rq_iov[1+] data to be encrypted/decrypted |
| 2157 | * rqst[1+].rq_iov[0+] data to be encrypted/decrypted |
| 2158 | */ |
| 2159 | for (i = 0; i < num_rqst; i++) { |
| 2160 | /* We really don't want a mixture of pinned and unpinned pages |
| 2161 | * in the sglist. It's hard to keep track of which is what. |
| 2162 | * Instead, we convert to a BVEC-type iterator higher up. |
| 2163 | */ |
| 2164 | if (WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) |
| 2165 | return -EIO; |
| 2166 | |
| 2167 | /* We also don't want to have any extra refs or pins to clean |
| 2168 | * up in the sglist. |
| 2169 | */ |
| 2170 | if (WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) |
| 2171 | return -EIO; |
| 2172 | |
| 2173 | for (j = 0; j < rqst[i].rq_nvec; j++) { |
| 2174 | struct kvec *iov = &rqst[i].rq_iov[j]; |
| 2175 | |
| 2176 | addr = (unsigned long)iov->iov_base + skip; |
| 2177 | if (unlikely(is_vmalloc_addr((void *)addr))) { |
| 2178 | len = iov->iov_len - skip; |
| 2179 | nents += DIV_ROUND_UP(offset_in_page(addr) + len, |
| 2180 | PAGE_SIZE); |
| 2181 | } else { |
| 2182 | nents++; |
| 2183 | } |
| 2184 | skip = 0; |
| 2185 | } |
| 2186 | nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); |
| 2187 | } |
| 2188 | nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); |
| 2189 | return nents; |
| 2190 | } |
| 2191 | |
| 2192 | /* We can not use the normal sg_set_buf() as we will sometimes pass a |
| 2193 | * stack object as buf. |
| 2194 | */ |
| 2195 | static inline void cifs_sg_set_buf(struct sg_table *sgtable, |
| 2196 | const void *buf, |
| 2197 | unsigned int buflen) |
| 2198 | { |
| 2199 | unsigned long addr = (unsigned long)buf; |
| 2200 | unsigned int off = offset_in_page(addr); |
| 2201 | |
| 2202 | addr &= PAGE_MASK; |
| 2203 | if (unlikely(is_vmalloc_addr((void *)addr))) { |
| 2204 | do { |
| 2205 | unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); |
| 2206 | |
| 2207 | sg_set_page(&sgtable->sgl[sgtable->nents++], |
| 2208 | vmalloc_to_page((void *)addr), len, off); |
| 2209 | |
| 2210 | off = 0; |
| 2211 | addr += PAGE_SIZE; |
| 2212 | buflen -= len; |
| 2213 | } while (buflen); |
| 2214 | } else { |
| 2215 | sg_set_page(&sgtable->sgl[sgtable->nents++], |
| 2216 | virt_to_page(addr), buflen, off); |
| 2217 | } |
| 2218 | } |
| 2219 | |
| 2220 | #endif /* _CIFS_GLOB_H */ |