1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2020, Microsoft Corporation. 4 * 5 * Author(s): Steve French <stfrench@microsoft.com> 6 * David Howells <dhowells@redhat.com> 7 */ 8 9 /* 10 #include <linux/module.h> 11 #include <linux/nsproxy.h> 12 #include <linux/slab.h> 13 #include <linux/magic.h> 14 #include <linux/security.h> 15 #include <net/net_namespace.h> 16 #ifdef CONFIG_CIFS_DFS_UPCALL 17 #include "dfs_cache.h" 18 #endif 19 */ 20 21 #include <linux/ctype.h> 22 #include <linux/fs_context.h> 23 #include <linux/fs_parser.h> 24 #include <linux/fs.h> 25 #include <linux/mount.h> 26 #include <linux/parser.h> 27 #include <linux/utsname.h> 28 #include "cifsfs.h" 29 #include "cifspdu.h" 30 #include "cifsglob.h" 31 #include "cifsproto.h" 32 #include "cifs_unicode.h" 33 #include "cifs_debug.h" 34 #include "cifs_fs_sb.h" 35 #include "ntlmssp.h" 36 #include "nterr.h" 37 #include "rfc1002pdu.h" 38 #include "fs_context.h" 39 40 DEFINE_MUTEX(cifs_mount_mutex); 41 42 static const match_table_t cifs_smb_version_tokens = { 43 { Smb_1, SMB1_VERSION_STRING }, 44 { Smb_20, SMB20_VERSION_STRING}, 45 { Smb_21, SMB21_VERSION_STRING }, 46 { Smb_30, SMB30_VERSION_STRING }, 47 { Smb_302, SMB302_VERSION_STRING }, 48 { Smb_302, ALT_SMB302_VERSION_STRING }, 49 { Smb_311, SMB311_VERSION_STRING }, 50 { Smb_311, ALT_SMB311_VERSION_STRING }, 51 { Smb_3any, SMB3ANY_VERSION_STRING }, 52 { Smb_default, SMBDEFAULT_VERSION_STRING }, 53 { Smb_version_err, NULL } 54 }; 55 56 static const match_table_t cifs_secflavor_tokens = { 57 { Opt_sec_krb5, "krb5" }, 58 { Opt_sec_krb5i, "krb5i" }, 59 { Opt_sec_krb5p, "krb5p" }, 60 { Opt_sec_ntlmsspi, "ntlmsspi" }, 61 { Opt_sec_ntlmssp, "ntlmssp" }, 62 { Opt_sec_ntlmv2, "nontlm" }, 63 { Opt_sec_ntlmv2, "ntlmv2" }, 64 { Opt_sec_ntlmv2i, "ntlmv2i" }, 65 { Opt_sec_none, "none" }, 66 67 { Opt_sec_err, NULL } 68 }; 69 70 static const match_table_t cifs_upcall_target = { 71 { Opt_upcall_target_mount, "mount" }, 72 { Opt_upcall_target_application, "app" }, 73 { Opt_upcall_target_err, NULL } 74 }; 75 76 const struct fs_parameter_spec smb3_fs_parameters[] = { 77 /* Mount options that take no arguments */ 78 fsparam_flag_no("user_xattr", Opt_user_xattr), 79 fsparam_flag_no("forceuid", Opt_forceuid), 80 fsparam_flag_no("multichannel", Opt_multichannel), 81 fsparam_flag_no("forcegid", Opt_forcegid), 82 fsparam_flag("noblocksend", Opt_noblocksend), 83 fsparam_flag("noautotune", Opt_noautotune), 84 fsparam_flag("nolease", Opt_nolease), 85 fsparam_flag_no("hard", Opt_hard), 86 fsparam_flag_no("soft", Opt_soft), 87 fsparam_flag_no("perm", Opt_perm), 88 fsparam_flag("nodelete", Opt_nodelete), 89 fsparam_flag_no("mapposix", Opt_mapposix), 90 fsparam_flag("mapchars", Opt_mapchars), 91 fsparam_flag("nomapchars", Opt_nomapchars), 92 fsparam_flag_no("sfu", Opt_sfu), 93 fsparam_flag("nodfs", Opt_nodfs), 94 fsparam_flag_no("posixpaths", Opt_posixpaths), 95 fsparam_flag_no("unix", Opt_unix), 96 fsparam_flag_no("linux", Opt_unix), 97 fsparam_flag_no("posix", Opt_unix), 98 fsparam_flag("nocase", Opt_nocase), 99 fsparam_flag("ignorecase", Opt_nocase), 100 fsparam_flag_no("brl", Opt_brl), 101 fsparam_flag_no("handlecache", Opt_handlecache), 102 fsparam_flag("forcemandatorylock", Opt_forcemandatorylock), 103 fsparam_flag("forcemand", Opt_forcemandatorylock), 104 fsparam_flag("setuidfromacl", Opt_setuidfromacl), 105 fsparam_flag("idsfromsid", Opt_setuidfromacl), 106 fsparam_flag_no("setuids", Opt_setuids), 107 fsparam_flag_no("dynperm", Opt_dynperm), 108 fsparam_flag_no("intr", Opt_intr), 109 fsparam_flag_no("strictsync", Opt_strictsync), 110 fsparam_flag_no("serverino", Opt_serverino), 111 fsparam_flag("rwpidforward", Opt_rwpidforward), 112 fsparam_flag("cifsacl", Opt_cifsacl), 113 fsparam_flag_no("acl", Opt_acl), 114 fsparam_flag("locallease", Opt_locallease), 115 fsparam_flag("sign", Opt_sign), 116 fsparam_flag("ignore_signature", Opt_ignore_signature), 117 fsparam_flag("signloosely", Opt_ignore_signature), 118 fsparam_flag("seal", Opt_seal), 119 fsparam_flag("noac", Opt_noac), 120 fsparam_flag("fsc", Opt_fsc), 121 fsparam_flag("mfsymlinks", Opt_mfsymlinks), 122 fsparam_flag("multiuser", Opt_multiuser), 123 fsparam_flag("sloppy", Opt_sloppy), 124 fsparam_flag("nosharesock", Opt_nosharesock), 125 fsparam_flag_no("persistenthandles", Opt_persistent), 126 fsparam_flag_no("resilienthandles", Opt_resilient), 127 fsparam_flag_no("tcpnodelay", Opt_tcp_nodelay), 128 fsparam_flag("nosparse", Opt_nosparse), 129 fsparam_flag("domainauto", Opt_domainauto), 130 fsparam_flag("rdma", Opt_rdma), 131 fsparam_flag("modesid", Opt_modesid), 132 fsparam_flag("modefromsid", Opt_modesid), 133 fsparam_flag("rootfs", Opt_rootfs), 134 fsparam_flag("compress", Opt_compress), 135 fsparam_flag("witness", Opt_witness), 136 fsparam_flag_no("nativesocket", Opt_nativesocket), 137 fsparam_flag_no("unicode", Opt_unicode), 138 fsparam_flag_no("nbsessinit", Opt_nbsessinit), 139 140 /* Mount options which take uid or gid */ 141 fsparam_uid("backupuid", Opt_backupuid), 142 fsparam_gid("backupgid", Opt_backupgid), 143 fsparam_uid("uid", Opt_uid), 144 fsparam_uid("cruid", Opt_cruid), 145 fsparam_gid("gid", Opt_gid), 146 147 /* Mount options which take numeric value */ 148 fsparam_u32("file_mode", Opt_file_mode), 149 fsparam_u32("dirmode", Opt_dirmode), 150 fsparam_u32("dir_mode", Opt_dirmode), 151 fsparam_u32("port", Opt_port), 152 fsparam_u32("min_enc_offload", Opt_min_enc_offload), 153 fsparam_u32("retrans", Opt_retrans), 154 fsparam_u32("esize", Opt_min_enc_offload), 155 fsparam_u32("bsize", Opt_blocksize), 156 fsparam_u32("rasize", Opt_rasize), 157 fsparam_u32("rsize", Opt_rsize), 158 fsparam_u32("wsize", Opt_wsize), 159 fsparam_u32("actimeo", Opt_actimeo), 160 fsparam_u32("acdirmax", Opt_acdirmax), 161 fsparam_u32("acregmax", Opt_acregmax), 162 fsparam_u32("closetimeo", Opt_closetimeo), 163 fsparam_u32("echo_interval", Opt_echo_interval), 164 fsparam_u32("max_credits", Opt_max_credits), 165 fsparam_u32("max_cached_dirs", Opt_max_cached_dirs), 166 fsparam_u32("handletimeout", Opt_handletimeout), 167 fsparam_u64("snapshot", Opt_snapshot), 168 fsparam_u32("max_channels", Opt_max_channels), 169 170 /* Mount options which take string value */ 171 fsparam_string("source", Opt_source), 172 fsparam_string("user", Opt_user), 173 fsparam_string("username", Opt_user), 174 fsparam_string("pass", Opt_pass), 175 fsparam_string("password", Opt_pass), 176 fsparam_string("pass2", Opt_pass2), 177 fsparam_string("password2", Opt_pass2), 178 fsparam_string("ip", Opt_ip), 179 fsparam_string("addr", Opt_ip), 180 fsparam_string("domain", Opt_domain), 181 fsparam_string("dom", Opt_domain), 182 fsparam_string("srcaddr", Opt_srcaddr), 183 fsparam_string("iocharset", Opt_iocharset), 184 fsparam_string("netbiosname", Opt_netbiosname), 185 fsparam_string("servern", Opt_servern), 186 fsparam_string("ver", Opt_ver), 187 fsparam_string("vers", Opt_vers), 188 fsparam_string("sec", Opt_sec), 189 fsparam_string("cache", Opt_cache), 190 fsparam_string("reparse", Opt_reparse), 191 fsparam_string("upcall_target", Opt_upcalltarget), 192 fsparam_string("symlink", Opt_symlink), 193 fsparam_string("symlinkroot", Opt_symlinkroot), 194 195 /* Arguments that should be ignored */ 196 fsparam_flag("guest", Opt_ignore), 197 fsparam_flag("noatime", Opt_ignore), 198 fsparam_flag("relatime", Opt_ignore), 199 fsparam_flag("_netdev", Opt_ignore), 200 fsparam_flag_no("suid", Opt_ignore), 201 fsparam_flag_no("exec", Opt_ignore), 202 fsparam_flag_no("dev", Opt_ignore), 203 fsparam_flag_no("mand", Opt_ignore), 204 fsparam_flag_no("auto", Opt_ignore), 205 fsparam_string("cred", Opt_ignore), 206 fsparam_string("credentials", Opt_ignore), 207 /* 208 * UNC and prefixpath is now extracted from Opt_source 209 * in the new mount API so we can just ignore them going forward. 210 */ 211 fsparam_string("unc", Opt_ignore), 212 fsparam_string("prefixpath", Opt_ignore), 213 {} 214 }; 215 216 static int 217 cifs_parse_security_flavors(struct fs_context *fc, char *value, struct smb3_fs_context *ctx) 218 { 219 220 substring_t args[MAX_OPT_ARGS]; 221 222 /* 223 * With mount options, the last one should win. Reset any existing 224 * settings back to default. 225 */ 226 ctx->sectype = Unspecified; 227 ctx->sign = false; 228 229 switch (match_token(value, cifs_secflavor_tokens, args)) { 230 case Opt_sec_krb5p: 231 cifs_errorf(fc, "sec=krb5p is not supported. Use sec=krb5,seal instead\n"); 232 return 1; 233 case Opt_sec_krb5i: 234 ctx->sign = true; 235 fallthrough; 236 case Opt_sec_krb5: 237 ctx->sectype = Kerberos; 238 break; 239 case Opt_sec_ntlmsspi: 240 ctx->sign = true; 241 fallthrough; 242 case Opt_sec_ntlmssp: 243 ctx->sectype = RawNTLMSSP; 244 break; 245 case Opt_sec_ntlmv2i: 246 ctx->sign = true; 247 fallthrough; 248 case Opt_sec_ntlmv2: 249 ctx->sectype = NTLMv2; 250 break; 251 case Opt_sec_none: 252 ctx->nullauth = 1; 253 kfree(ctx->username); 254 ctx->username = NULL; 255 break; 256 default: 257 cifs_errorf(fc, "bad security option: %s\n", value); 258 return 1; 259 } 260 261 return 0; 262 } 263 264 static int 265 cifs_parse_upcall_target(struct fs_context *fc, char *value, struct smb3_fs_context *ctx) 266 { 267 substring_t args[MAX_OPT_ARGS]; 268 269 ctx->upcall_target = UPTARGET_UNSPECIFIED; 270 271 switch (match_token(value, cifs_upcall_target, args)) { 272 case Opt_upcall_target_mount: 273 ctx->upcall_target = UPTARGET_MOUNT; 274 break; 275 case Opt_upcall_target_application: 276 ctx->upcall_target = UPTARGET_APP; 277 break; 278 279 default: 280 cifs_errorf(fc, "bad upcall target: %s\n", value); 281 return 1; 282 } 283 284 return 0; 285 } 286 287 static const match_table_t cifs_cacheflavor_tokens = { 288 { Opt_cache_loose, "loose" }, 289 { Opt_cache_strict, "strict" }, 290 { Opt_cache_none, "none" }, 291 { Opt_cache_ro, "ro" }, 292 { Opt_cache_rw, "singleclient" }, 293 { Opt_cache_err, NULL } 294 }; 295 296 static int 297 cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_context *ctx) 298 { 299 substring_t args[MAX_OPT_ARGS]; 300 301 switch (match_token(value, cifs_cacheflavor_tokens, args)) { 302 case Opt_cache_loose: 303 ctx->direct_io = false; 304 ctx->strict_io = false; 305 ctx->cache_ro = false; 306 ctx->cache_rw = false; 307 break; 308 case Opt_cache_strict: 309 ctx->direct_io = false; 310 ctx->strict_io = true; 311 ctx->cache_ro = false; 312 ctx->cache_rw = false; 313 break; 314 case Opt_cache_none: 315 ctx->direct_io = true; 316 ctx->strict_io = false; 317 ctx->cache_ro = false; 318 ctx->cache_rw = false; 319 break; 320 case Opt_cache_ro: 321 ctx->direct_io = false; 322 ctx->strict_io = false; 323 ctx->cache_ro = true; 324 ctx->cache_rw = false; 325 break; 326 case Opt_cache_rw: 327 ctx->direct_io = false; 328 ctx->strict_io = false; 329 ctx->cache_ro = false; 330 ctx->cache_rw = true; 331 break; 332 default: 333 cifs_errorf(fc, "bad cache= option: %s\n", value); 334 return 1; 335 } 336 return 0; 337 } 338 339 static const match_table_t reparse_flavor_tokens = { 340 { Opt_reparse_default, "default" }, 341 { Opt_reparse_none, "none" }, 342 { Opt_reparse_nfs, "nfs" }, 343 { Opt_reparse_wsl, "wsl" }, 344 { Opt_reparse_err, NULL }, 345 }; 346 347 static int parse_reparse_flavor(struct fs_context *fc, char *value, 348 struct smb3_fs_context *ctx) 349 { 350 substring_t args[MAX_OPT_ARGS]; 351 352 switch (match_token(value, reparse_flavor_tokens, args)) { 353 case Opt_reparse_default: 354 ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT; 355 break; 356 case Opt_reparse_none: 357 ctx->reparse_type = CIFS_REPARSE_TYPE_NONE; 358 break; 359 case Opt_reparse_nfs: 360 ctx->reparse_type = CIFS_REPARSE_TYPE_NFS; 361 break; 362 case Opt_reparse_wsl: 363 ctx->reparse_type = CIFS_REPARSE_TYPE_WSL; 364 break; 365 default: 366 cifs_errorf(fc, "bad reparse= option: %s\n", value); 367 return 1; 368 } 369 return 0; 370 } 371 372 static const match_table_t symlink_flavor_tokens = { 373 { Opt_symlink_default, "default" }, 374 { Opt_symlink_none, "none" }, 375 { Opt_symlink_native, "native" }, 376 { Opt_symlink_unix, "unix" }, 377 { Opt_symlink_mfsymlinks, "mfsymlinks" }, 378 { Opt_symlink_sfu, "sfu" }, 379 { Opt_symlink_nfs, "nfs" }, 380 { Opt_symlink_wsl, "wsl" }, 381 { Opt_symlink_err, NULL }, 382 }; 383 384 static int parse_symlink_flavor(struct fs_context *fc, char *value, 385 struct smb3_fs_context *ctx) 386 { 387 substring_t args[MAX_OPT_ARGS]; 388 389 switch (match_token(value, symlink_flavor_tokens, args)) { 390 case Opt_symlink_default: 391 ctx->symlink_type = CIFS_SYMLINK_TYPE_DEFAULT; 392 break; 393 case Opt_symlink_none: 394 ctx->symlink_type = CIFS_SYMLINK_TYPE_NONE; 395 break; 396 case Opt_symlink_native: 397 ctx->symlink_type = CIFS_SYMLINK_TYPE_NATIVE; 398 break; 399 case Opt_symlink_unix: 400 ctx->symlink_type = CIFS_SYMLINK_TYPE_UNIX; 401 break; 402 case Opt_symlink_mfsymlinks: 403 ctx->symlink_type = CIFS_SYMLINK_TYPE_MFSYMLINKS; 404 break; 405 case Opt_symlink_sfu: 406 ctx->symlink_type = CIFS_SYMLINK_TYPE_SFU; 407 break; 408 case Opt_symlink_nfs: 409 ctx->symlink_type = CIFS_SYMLINK_TYPE_NFS; 410 break; 411 case Opt_symlink_wsl: 412 ctx->symlink_type = CIFS_SYMLINK_TYPE_WSL; 413 break; 414 default: 415 cifs_errorf(fc, "bad symlink= option: %s\n", value); 416 return 1; 417 } 418 return 0; 419 } 420 421 #define DUP_CTX_STR(field) \ 422 do { \ 423 if (ctx->field) { \ 424 new_ctx->field = kstrdup(ctx->field, GFP_ATOMIC); \ 425 if (new_ctx->field == NULL) { \ 426 smb3_cleanup_fs_context_contents(new_ctx); \ 427 return -ENOMEM; \ 428 } \ 429 } \ 430 } while (0) 431 432 int 433 smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx) 434 { 435 memcpy(new_ctx, ctx, sizeof(*ctx)); 436 new_ctx->prepath = NULL; 437 new_ctx->nodename = NULL; 438 new_ctx->username = NULL; 439 new_ctx->password = NULL; 440 new_ctx->password2 = NULL; 441 new_ctx->server_hostname = NULL; 442 new_ctx->domainname = NULL; 443 new_ctx->UNC = NULL; 444 new_ctx->source = NULL; 445 new_ctx->iocharset = NULL; 446 new_ctx->leaf_fullpath = NULL; 447 new_ctx->dns_dom = NULL; 448 new_ctx->symlinkroot = NULL; 449 /* 450 * Make sure to stay in sync with smb3_cleanup_fs_context_contents() 451 */ 452 DUP_CTX_STR(prepath); 453 DUP_CTX_STR(username); 454 DUP_CTX_STR(password); 455 DUP_CTX_STR(password2); 456 DUP_CTX_STR(server_hostname); 457 DUP_CTX_STR(UNC); 458 DUP_CTX_STR(source); 459 DUP_CTX_STR(domainname); 460 DUP_CTX_STR(nodename); 461 DUP_CTX_STR(iocharset); 462 DUP_CTX_STR(leaf_fullpath); 463 DUP_CTX_STR(dns_dom); 464 DUP_CTX_STR(symlinkroot); 465 466 return 0; 467 } 468 469 static int 470 cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3) 471 { 472 substring_t args[MAX_OPT_ARGS]; 473 474 switch (match_token(value, cifs_smb_version_tokens, args)) { 475 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 476 case Smb_1: 477 if (disable_legacy_dialects) { 478 cifs_errorf(fc, "mount with legacy dialect disabled\n"); 479 return 1; 480 } 481 if (is_smb3) { 482 cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n"); 483 return 1; 484 } 485 cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n"); 486 ctx->ops = &smb1_operations; 487 ctx->vals = &smb1_values; 488 break; 489 case Smb_20: 490 if (disable_legacy_dialects) { 491 cifs_errorf(fc, "mount with legacy dialect disabled\n"); 492 return 1; 493 } 494 if (is_smb3) { 495 cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n"); 496 return 1; 497 } 498 ctx->ops = &smb20_operations; 499 ctx->vals = &smb20_values; 500 break; 501 #else 502 case Smb_1: 503 cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n"); 504 return 1; 505 case Smb_20: 506 cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n"); 507 return 1; 508 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 509 case Smb_21: 510 ctx->ops = &smb21_operations; 511 ctx->vals = &smb21_values; 512 break; 513 case Smb_30: 514 ctx->ops = &smb30_operations; 515 ctx->vals = &smb30_values; 516 break; 517 case Smb_302: 518 ctx->ops = &smb30_operations; /* currently identical with 3.0 */ 519 ctx->vals = &smb302_values; 520 break; 521 case Smb_311: 522 ctx->ops = &smb311_operations; 523 ctx->vals = &smb311_values; 524 break; 525 case Smb_3any: 526 ctx->ops = &smb30_operations; /* currently identical with 3.0 */ 527 ctx->vals = &smb3any_values; 528 break; 529 case Smb_default: 530 ctx->ops = &smb30_operations; 531 ctx->vals = &smbdefault_values; 532 break; 533 default: 534 cifs_errorf(fc, "Unknown vers= option specified: %s\n", value); 535 return 1; 536 } 537 return 0; 538 } 539 540 int smb3_parse_opt(const char *options, const char *key, char **val) 541 { 542 int rc = -ENOENT; 543 char *opts, *orig, *p; 544 545 orig = opts = kstrdup(options, GFP_KERNEL); 546 if (!opts) 547 return -ENOMEM; 548 549 while ((p = strsep(&opts, ","))) { 550 char *nval; 551 552 if (!*p) 553 continue; 554 if (strncasecmp(p, key, strlen(key))) 555 continue; 556 nval = strchr(p, '='); 557 if (nval) { 558 if (nval == p) 559 continue; 560 *nval++ = 0; 561 *val = kstrdup(nval, GFP_KERNEL); 562 rc = !*val ? -ENOMEM : 0; 563 goto out; 564 } 565 } 566 out: 567 kfree(orig); 568 return rc; 569 } 570 571 /* 572 * Remove duplicate path delimiters. Windows is supposed to do that 573 * but there are some bugs that prevent rename from working if there are 574 * multiple delimiters. 575 * 576 * Return a sanitized duplicate of @path or NULL for empty prefix paths. 577 * Otherwise, return ERR_PTR. 578 * 579 * @gfp indicates the GFP_* flags for kstrdup. 580 * The caller is responsible for freeing the original. 581 */ 582 #define IS_DELIM(c) ((c) == '/' || (c) == '\\') 583 char *cifs_sanitize_prepath(char *prepath, gfp_t gfp) 584 { 585 char *cursor1 = prepath, *cursor2 = prepath; 586 char *s; 587 588 /* skip all prepended delimiters */ 589 while (IS_DELIM(*cursor1)) 590 cursor1++; 591 592 /* copy the first letter */ 593 *cursor2 = *cursor1; 594 595 /* copy the remainder... */ 596 while (*(cursor1++)) { 597 /* ... skipping all duplicated delimiters */ 598 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2)) 599 continue; 600 *(++cursor2) = *cursor1; 601 } 602 603 /* if the last character is a delimiter, skip it */ 604 if (IS_DELIM(*(cursor2 - 1))) 605 cursor2--; 606 607 *cursor2 = '\0'; 608 if (!*prepath) 609 return NULL; 610 s = kstrdup(prepath, gfp); 611 if (!s) 612 return ERR_PTR(-ENOMEM); 613 return s; 614 } 615 616 /* 617 * Return full path based on the values of @ctx->{UNC,prepath}. 618 * 619 * It is assumed that both values were already parsed by smb3_parse_devname(). 620 */ 621 char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx, char dirsep) 622 { 623 size_t ulen, plen; 624 char *s; 625 626 ulen = strlen(ctx->UNC); 627 plen = ctx->prepath ? strlen(ctx->prepath) + 1 : 0; 628 629 s = kmalloc(ulen + plen + 1, GFP_KERNEL); 630 if (!s) 631 return ERR_PTR(-ENOMEM); 632 memcpy(s, ctx->UNC, ulen); 633 if (plen) { 634 s[ulen] = dirsep; 635 memcpy(s + ulen + 1, ctx->prepath, plen); 636 } 637 s[ulen + plen] = '\0'; 638 convert_delimiter(s, dirsep); 639 return s; 640 } 641 642 /* 643 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath 644 * fields with the result. Returns 0 on success and an error otherwise 645 * (e.g. ENOMEM or EINVAL) 646 */ 647 int 648 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx) 649 { 650 char *pos; 651 const char *delims = "/\\"; 652 size_t len; 653 int rc; 654 655 if (unlikely(!devname || !*devname)) { 656 cifs_dbg(VFS, "Device name not specified\n"); 657 return -EINVAL; 658 } 659 660 /* make sure we have a valid UNC double delimiter prefix */ 661 len = strspn(devname, delims); 662 if (len != 2) 663 return -EINVAL; 664 665 /* find delimiter between host and sharename */ 666 pos = strpbrk(devname + 2, delims); 667 if (!pos) 668 return -EINVAL; 669 670 /* record the server hostname */ 671 kfree(ctx->server_hostname); 672 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL); 673 if (!ctx->server_hostname) 674 return -ENOMEM; 675 676 /* skip past delimiter */ 677 ++pos; 678 679 /* now go until next delimiter or end of string */ 680 len = strcspn(pos, delims); 681 if (!len) 682 return -EINVAL; 683 684 /* move "pos" up to delimiter or NULL */ 685 pos += len; 686 kfree(ctx->UNC); 687 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); 688 if (!ctx->UNC) 689 return -ENOMEM; 690 691 convert_delimiter(ctx->UNC, '\\'); 692 693 /* skip any delimiter */ 694 if (*pos == '/' || *pos == '\\') 695 pos++; 696 697 kfree(ctx->prepath); 698 ctx->prepath = NULL; 699 700 /* If pos is NULL then no prepath */ 701 if (!*pos) 702 return 0; 703 704 ctx->prepath = cifs_sanitize_prepath(pos, GFP_KERNEL); 705 if (IS_ERR(ctx->prepath)) { 706 rc = PTR_ERR(ctx->prepath); 707 ctx->prepath = NULL; 708 return rc; 709 } 710 711 return 0; 712 } 713 714 static void smb3_fs_context_free(struct fs_context *fc); 715 static int smb3_fs_context_parse_param(struct fs_context *fc, 716 struct fs_parameter *param); 717 static int smb3_fs_context_parse_monolithic(struct fs_context *fc, 718 void *data); 719 static int smb3_get_tree(struct fs_context *fc); 720 static int smb3_reconfigure(struct fs_context *fc); 721 722 static const struct fs_context_operations smb3_fs_context_ops = { 723 .free = smb3_fs_context_free, 724 .parse_param = smb3_fs_context_parse_param, 725 .parse_monolithic = smb3_fs_context_parse_monolithic, 726 .get_tree = smb3_get_tree, 727 .reconfigure = smb3_reconfigure, 728 }; 729 730 /* 731 * Parse a monolithic block of data from sys_mount(). 732 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data 733 * @ctx: The superblock configuration to fill in. 734 * @data: The data to parse 735 * 736 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be 737 * called from the ->monolithic_mount_data() fs_context operation. 738 * 739 * Returns 0 on success or the error returned by the ->parse_option() fs_context 740 * operation on failure. 741 */ 742 static int smb3_fs_context_parse_monolithic(struct fs_context *fc, 743 void *data) 744 { 745 char *options = data, *key; 746 int ret = 0; 747 748 if (!options) 749 return 0; 750 751 ret = security_sb_eat_lsm_opts(options, &fc->security); 752 if (ret) 753 return ret; 754 755 /* BB Need to add support for sep= here TBD */ 756 while ((key = strsep(&options, ",")) != NULL) { 757 size_t len; 758 char *value; 759 760 if (*key == 0) 761 break; 762 763 /* Check if following character is the deliminator If yes, 764 * we have encountered a double deliminator reset the NULL 765 * character to the deliminator 766 */ 767 while (options && options[0] == ',') { 768 len = strlen(key); 769 strcpy(key + len, options); 770 options = strchr(options, ','); 771 if (options) 772 *options++ = 0; 773 } 774 775 776 len = 0; 777 value = strchr(key, '='); 778 if (value) { 779 if (value == key) 780 continue; 781 *value++ = 0; 782 len = strlen(value); 783 } 784 785 ret = vfs_parse_fs_string(fc, key, value, len); 786 if (ret < 0) 787 break; 788 } 789 790 return ret; 791 } 792 793 /* 794 * Validate the preparsed information in the config. 795 */ 796 static int smb3_fs_context_validate(struct fs_context *fc) 797 { 798 struct smb3_fs_context *ctx = smb3_fc2context(fc); 799 800 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) { 801 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n"); 802 return -EOPNOTSUPP; 803 } 804 805 #ifndef CONFIG_KEYS 806 /* Muliuser mounts require CONFIG_KEYS support */ 807 if (ctx->multiuser) { 808 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); 809 return -1; 810 } 811 #endif 812 813 if (ctx->got_version == false) 814 pr_warn_once("No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3.1.1), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3.1.1 (or even SMB3 or SMB2.1) specify vers=1.0 on mount.\n"); 815 816 817 if (!ctx->UNC) { 818 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n"); 819 return -1; 820 } 821 822 /* make sure UNC has a share name */ 823 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) { 824 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n"); 825 return -ENOENT; 826 } 827 828 if (!ctx->got_ip) { 829 int len; 830 const char *slash; 831 832 /* No ip= option specified? Try to get it from UNC */ 833 /* Use the address part of the UNC. */ 834 slash = strchr(&ctx->UNC[2], '\\'); 835 len = slash - &ctx->UNC[2]; 836 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr, 837 &ctx->UNC[2], len)) { 838 pr_err("Unable to determine destination address\n"); 839 return -EHOSTUNREACH; 840 } 841 } 842 843 /* set the port that we got earlier */ 844 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port); 845 846 if (ctx->uid_specified && !ctx->forceuid_specified) { 847 ctx->override_uid = 1; 848 pr_notice("enabling forceuid mount option implicitly because uid= option is specified\n"); 849 } 850 851 if (ctx->gid_specified && !ctx->forcegid_specified) { 852 ctx->override_gid = 1; 853 pr_notice("enabling forcegid mount option implicitly because gid= option is specified\n"); 854 } 855 856 if (ctx->override_uid && !ctx->uid_specified) { 857 ctx->override_uid = 0; 858 pr_notice("ignoring forceuid mount option specified with no uid= option\n"); 859 } 860 861 if (ctx->override_gid && !ctx->gid_specified) { 862 ctx->override_gid = 0; 863 pr_notice("ignoring forcegid mount option specified with no gid= option\n"); 864 } 865 866 return 0; 867 } 868 869 static int smb3_get_tree_common(struct fs_context *fc) 870 { 871 struct smb3_fs_context *ctx = smb3_fc2context(fc); 872 struct dentry *root; 873 int rc = 0; 874 875 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx); 876 if (IS_ERR(root)) 877 return PTR_ERR(root); 878 879 fc->root = root; 880 881 return rc; 882 } 883 884 /* 885 * Create an SMB3 superblock from the parameters passed. 886 */ 887 static int smb3_get_tree(struct fs_context *fc) 888 { 889 int err = smb3_fs_context_validate(fc); 890 int ret; 891 892 if (err) 893 return err; 894 cifs_mount_lock(); 895 ret = smb3_get_tree_common(fc); 896 cifs_mount_unlock(); 897 return ret; 898 } 899 900 static void smb3_fs_context_free(struct fs_context *fc) 901 { 902 struct smb3_fs_context *ctx = smb3_fc2context(fc); 903 904 smb3_cleanup_fs_context(ctx); 905 } 906 907 /* 908 * Compare the old and new proposed context during reconfigure 909 * and check if the changes are compatible. 910 */ 911 static int smb3_verify_reconfigure_ctx(struct fs_context *fc, 912 struct smb3_fs_context *new_ctx, 913 struct smb3_fs_context *old_ctx, bool need_recon) 914 { 915 if (new_ctx->posix_paths != old_ctx->posix_paths) { 916 cifs_errorf(fc, "can not change posixpaths during remount\n"); 917 return -EINVAL; 918 } 919 if (new_ctx->sectype != old_ctx->sectype) { 920 cifs_errorf(fc, "can not change sec during remount\n"); 921 return -EINVAL; 922 } 923 if (new_ctx->multiuser != old_ctx->multiuser) { 924 cifs_errorf(fc, "can not change multiuser during remount\n"); 925 return -EINVAL; 926 } 927 if (new_ctx->UNC && 928 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) { 929 cifs_errorf(fc, "can not change UNC during remount\n"); 930 return -EINVAL; 931 } 932 if (new_ctx->username && 933 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) { 934 cifs_errorf(fc, "can not change username during remount\n"); 935 return -EINVAL; 936 } 937 if (new_ctx->password && 938 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) { 939 if (need_recon == false) { 940 cifs_errorf(fc, 941 "can not change password of active session during remount\n"); 942 return -EINVAL; 943 } else if (old_ctx->sectype == Kerberos) { 944 cifs_errorf(fc, 945 "can not change password for Kerberos via remount\n"); 946 return -EINVAL; 947 } 948 } 949 if (new_ctx->domainname && 950 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) { 951 cifs_errorf(fc, "can not change domainname during remount\n"); 952 return -EINVAL; 953 } 954 if (strcmp(new_ctx->workstation_name, old_ctx->workstation_name)) { 955 cifs_errorf(fc, "can not change workstation_name during remount\n"); 956 return -EINVAL; 957 } 958 if (new_ctx->nodename && 959 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) { 960 cifs_errorf(fc, "can not change nodename during remount\n"); 961 return -EINVAL; 962 } 963 if (new_ctx->iocharset && 964 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) { 965 cifs_errorf(fc, "can not change iocharset during remount\n"); 966 return -EINVAL; 967 } 968 if (new_ctx->unicode != old_ctx->unicode) { 969 cifs_errorf(fc, "can not change unicode during remount\n"); 970 return -EINVAL; 971 } 972 if (new_ctx->rfc1001_sessinit != old_ctx->rfc1001_sessinit) { 973 cifs_errorf(fc, "can not change nbsessinit during remount\n"); 974 return -EINVAL; 975 } 976 977 return 0; 978 } 979 980 #define STEAL_STRING(cifs_sb, ctx, field) \ 981 do { \ 982 kfree(ctx->field); \ 983 ctx->field = cifs_sb->ctx->field; \ 984 cifs_sb->ctx->field = NULL; \ 985 } while (0) 986 987 #define STEAL_STRING_SENSITIVE(cifs_sb, ctx, field) \ 988 do { \ 989 kfree_sensitive(ctx->field); \ 990 ctx->field = cifs_sb->ctx->field; \ 991 cifs_sb->ctx->field = NULL; \ 992 } while (0) 993 994 int smb3_sync_session_ctx_passwords(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses) 995 { 996 if (ses->password && 997 cifs_sb->ctx->password && 998 strcmp(ses->password, cifs_sb->ctx->password)) { 999 kfree_sensitive(cifs_sb->ctx->password); 1000 cifs_sb->ctx->password = kstrdup(ses->password, GFP_KERNEL); 1001 if (!cifs_sb->ctx->password) 1002 return -ENOMEM; 1003 } 1004 if (ses->password2 && 1005 cifs_sb->ctx->password2 && 1006 strcmp(ses->password2, cifs_sb->ctx->password2)) { 1007 kfree_sensitive(cifs_sb->ctx->password2); 1008 cifs_sb->ctx->password2 = kstrdup(ses->password2, GFP_KERNEL); 1009 if (!cifs_sb->ctx->password2) { 1010 kfree_sensitive(cifs_sb->ctx->password); 1011 cifs_sb->ctx->password = NULL; 1012 return -ENOMEM; 1013 } 1014 } 1015 return 0; 1016 } 1017 1018 static int smb3_reconfigure(struct fs_context *fc) 1019 { 1020 struct smb3_fs_context *ctx = smb3_fc2context(fc); 1021 struct dentry *root = fc->root; 1022 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); 1023 struct cifs_ses *ses = cifs_sb_master_tcon(cifs_sb)->ses; 1024 unsigned int rsize = ctx->rsize, wsize = ctx->wsize; 1025 char *new_password = NULL, *new_password2 = NULL; 1026 bool need_recon = false; 1027 int rc; 1028 1029 if (ses->expired_pwd) 1030 need_recon = true; 1031 1032 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx, need_recon); 1033 if (rc) 1034 return rc; 1035 1036 /* 1037 * We can not change UNC/username/password/domainname/ 1038 * workstation_name/nodename/iocharset 1039 * during reconnect so ignore what we have in the new context and 1040 * just use what we already have in cifs_sb->ctx. 1041 */ 1042 STEAL_STRING(cifs_sb, ctx, UNC); 1043 STEAL_STRING(cifs_sb, ctx, source); 1044 STEAL_STRING(cifs_sb, ctx, username); 1045 1046 if (need_recon == false) 1047 STEAL_STRING_SENSITIVE(cifs_sb, ctx, password); 1048 else { 1049 if (ctx->password) { 1050 new_password = kstrdup(ctx->password, GFP_KERNEL); 1051 if (!new_password) 1052 return -ENOMEM; 1053 } else 1054 STEAL_STRING_SENSITIVE(cifs_sb, ctx, password); 1055 } 1056 1057 /* 1058 * if a new password2 has been specified, then reset it's value 1059 * inside the ses struct 1060 */ 1061 if (ctx->password2) { 1062 new_password2 = kstrdup(ctx->password2, GFP_KERNEL); 1063 if (!new_password2) { 1064 kfree_sensitive(new_password); 1065 return -ENOMEM; 1066 } 1067 } else 1068 STEAL_STRING_SENSITIVE(cifs_sb, ctx, password2); 1069 1070 /* 1071 * we may update the passwords in the ses struct below. Make sure we do 1072 * not race with smb2_reconnect 1073 */ 1074 mutex_lock(&ses->session_mutex); 1075 1076 /* 1077 * smb2_reconnect may swap password and password2 in case session setup 1078 * failed. First get ctx passwords in sync with ses passwords. It should 1079 * be okay to do this even if this function were to return an error at a 1080 * later stage 1081 */ 1082 rc = smb3_sync_session_ctx_passwords(cifs_sb, ses); 1083 if (rc) { 1084 mutex_unlock(&ses->session_mutex); 1085 return rc; 1086 } 1087 1088 /* 1089 * now that allocations for passwords are done, commit them 1090 */ 1091 if (new_password) { 1092 kfree_sensitive(ses->password); 1093 ses->password = new_password; 1094 } 1095 if (new_password2) { 1096 kfree_sensitive(ses->password2); 1097 ses->password2 = new_password2; 1098 } 1099 1100 mutex_unlock(&ses->session_mutex); 1101 1102 STEAL_STRING(cifs_sb, ctx, domainname); 1103 STEAL_STRING(cifs_sb, ctx, nodename); 1104 STEAL_STRING(cifs_sb, ctx, iocharset); 1105 1106 /* if rsize or wsize not passed in on remount, use previous values */ 1107 ctx->rsize = rsize ? CIFS_ALIGN_RSIZE(fc, rsize) : cifs_sb->ctx->rsize; 1108 ctx->wsize = wsize ? CIFS_ALIGN_WSIZE(fc, wsize) : cifs_sb->ctx->wsize; 1109 1110 smb3_cleanup_fs_context_contents(cifs_sb->ctx); 1111 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx); 1112 smb3_update_mnt_flags(cifs_sb); 1113 #ifdef CONFIG_CIFS_DFS_UPCALL 1114 if (!rc) 1115 rc = dfs_cache_remount_fs(cifs_sb); 1116 #endif 1117 1118 return rc; 1119 } 1120 1121 static int smb3_fs_context_parse_param(struct fs_context *fc, 1122 struct fs_parameter *param) 1123 { 1124 struct fs_parse_result result; 1125 struct smb3_fs_context *ctx = smb3_fc2context(fc); 1126 int i, opt; 1127 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3"); 1128 bool skip_parsing = false; 1129 char *hostname; 1130 1131 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key); 1132 1133 /* 1134 * fs_parse can not handle string options with an empty value so 1135 * we will need special handling of them. 1136 */ 1137 if (param->type == fs_value_is_string && param->string[0] == 0) { 1138 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) { 1139 skip_parsing = true; 1140 opt = Opt_pass; 1141 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) { 1142 skip_parsing = true; 1143 opt = Opt_user; 1144 } else if (!strcmp("pass2", param->key) || !strcmp("password2", param->key)) { 1145 skip_parsing = true; 1146 opt = Opt_pass2; 1147 } 1148 } 1149 1150 if (!skip_parsing) { 1151 opt = fs_parse(fc, smb3_fs_parameters, param, &result); 1152 if (opt < 0) 1153 return ctx->sloppy ? 1 : opt; 1154 } 1155 1156 switch (opt) { 1157 case Opt_compress: 1158 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION)) { 1159 cifs_errorf(fc, "CONFIG_CIFS_COMPRESSION kernel config option is unset\n"); 1160 goto cifs_parse_mount_err; 1161 } 1162 ctx->compress = true; 1163 cifs_dbg(VFS, "SMB3 compression support is experimental\n"); 1164 break; 1165 case Opt_nodfs: 1166 ctx->nodfs = 1; 1167 break; 1168 case Opt_hard: 1169 if (result.negated) { 1170 if (ctx->retry == 1) 1171 cifs_dbg(VFS, "conflicting hard vs. soft mount options\n"); 1172 ctx->retry = 0; 1173 } else 1174 ctx->retry = 1; 1175 break; 1176 case Opt_soft: 1177 if (result.negated) 1178 ctx->retry = 1; 1179 else { 1180 if (ctx->retry == 1) 1181 cifs_dbg(VFS, "conflicting hard vs soft mount options\n"); 1182 ctx->retry = 0; 1183 } 1184 break; 1185 case Opt_mapposix: 1186 if (result.negated) 1187 ctx->remap = false; 1188 else { 1189 ctx->remap = true; 1190 ctx->sfu_remap = false; /* disable SFU mapping */ 1191 } 1192 break; 1193 case Opt_mapchars: 1194 if (result.negated) 1195 ctx->sfu_remap = false; 1196 else { 1197 ctx->sfu_remap = true; 1198 ctx->remap = false; /* disable SFM (mapposix) mapping */ 1199 } 1200 break; 1201 case Opt_user_xattr: 1202 if (result.negated) 1203 ctx->no_xattr = 1; 1204 else 1205 ctx->no_xattr = 0; 1206 break; 1207 case Opt_forceuid: 1208 if (result.negated) 1209 ctx->override_uid = 0; 1210 else 1211 ctx->override_uid = 1; 1212 ctx->forceuid_specified = true; 1213 break; 1214 case Opt_forcegid: 1215 if (result.negated) 1216 ctx->override_gid = 0; 1217 else 1218 ctx->override_gid = 1; 1219 ctx->forcegid_specified = true; 1220 break; 1221 case Opt_perm: 1222 if (result.negated) 1223 ctx->noperm = 1; 1224 else 1225 ctx->noperm = 0; 1226 break; 1227 case Opt_dynperm: 1228 if (result.negated) 1229 ctx->dynperm = 0; 1230 else 1231 ctx->dynperm = 1; 1232 break; 1233 case Opt_sfu: 1234 if (result.negated) 1235 ctx->sfu_emul = 0; 1236 else 1237 ctx->sfu_emul = 1; 1238 break; 1239 case Opt_noblocksend: 1240 ctx->noblocksnd = 1; 1241 break; 1242 case Opt_noautotune: 1243 ctx->noautotune = 1; 1244 break; 1245 case Opt_nolease: 1246 ctx->no_lease = 1; 1247 break; 1248 case Opt_nosparse: 1249 ctx->no_sparse = 1; 1250 break; 1251 case Opt_nodelete: 1252 ctx->nodelete = 1; 1253 break; 1254 case Opt_multichannel: 1255 if (result.negated) { 1256 ctx->multichannel = false; 1257 ctx->max_channels = 1; 1258 } else { 1259 ctx->multichannel = true; 1260 /* if number of channels not specified, default to 2 */ 1261 if (ctx->max_channels < 2) 1262 ctx->max_channels = 2; 1263 } 1264 break; 1265 case Opt_uid: 1266 ctx->linux_uid = result.uid; 1267 ctx->uid_specified = true; 1268 break; 1269 case Opt_cruid: 1270 ctx->cred_uid = result.uid; 1271 ctx->cruid_specified = true; 1272 break; 1273 case Opt_backupuid: 1274 ctx->backupuid = result.uid; 1275 ctx->backupuid_specified = true; 1276 break; 1277 case Opt_backupgid: 1278 ctx->backupgid = result.gid; 1279 ctx->backupgid_specified = true; 1280 break; 1281 case Opt_gid: 1282 ctx->linux_gid = result.gid; 1283 ctx->gid_specified = true; 1284 break; 1285 case Opt_port: 1286 ctx->port = result.uint_32; 1287 break; 1288 case Opt_file_mode: 1289 ctx->file_mode = result.uint_32; 1290 break; 1291 case Opt_dirmode: 1292 ctx->dir_mode = result.uint_32; 1293 break; 1294 case Opt_min_enc_offload: 1295 ctx->min_offload = result.uint_32; 1296 break; 1297 case Opt_retrans: 1298 ctx->retrans = result.uint_32; 1299 break; 1300 case Opt_blocksize: 1301 /* 1302 * inode blocksize realistically should never need to be 1303 * less than 16K or greater than 16M and default is 1MB. 1304 * Note that small inode block sizes (e.g. 64K) can lead 1305 * to very poor performance of common tools like cp and scp 1306 */ 1307 if ((result.uint_32 < CIFS_MAX_MSGSIZE) || 1308 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) { 1309 cifs_errorf(fc, "%s: Invalid blocksize\n", 1310 __func__); 1311 goto cifs_parse_mount_err; 1312 } 1313 ctx->bsize = CIFS_ALIGN_BSIZE(fc, result.uint_32); 1314 ctx->got_bsize = true; 1315 break; 1316 case Opt_rasize: 1317 /* 1318 * readahead size realistically should never need to be 1319 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M 1320 * (perhaps an exception should be considered in the 1321 * for the case of a large number of channels 1322 * when multichannel is negotiated) since that would lead 1323 * to plenty of parallel I/O in flight to the server. 1324 * Note that smaller read ahead sizes would 1325 * hurt performance of common tools like cp and scp 1326 * which often trigger sequential i/o with read ahead 1327 */ 1328 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) || 1329 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) { 1330 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n", 1331 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE); 1332 goto cifs_parse_mount_err; 1333 } 1334 ctx->rasize = result.uint_32; 1335 break; 1336 case Opt_rsize: 1337 ctx->rsize = CIFS_ALIGN_RSIZE(fc, result.uint_32); 1338 ctx->got_rsize = true; 1339 ctx->vol_rsize = ctx->rsize; 1340 break; 1341 case Opt_wsize: 1342 ctx->wsize = CIFS_ALIGN_WSIZE(fc, result.uint_32); 1343 ctx->got_wsize = true; 1344 ctx->vol_wsize = ctx->wsize; 1345 break; 1346 case Opt_acregmax: 1347 if (result.uint_32 > CIFS_MAX_ACTIMEO / HZ) { 1348 cifs_errorf(fc, "acregmax too large\n"); 1349 goto cifs_parse_mount_err; 1350 } 1351 ctx->acregmax = HZ * result.uint_32; 1352 break; 1353 case Opt_acdirmax: 1354 if (result.uint_32 > CIFS_MAX_ACTIMEO / HZ) { 1355 cifs_errorf(fc, "acdirmax too large\n"); 1356 goto cifs_parse_mount_err; 1357 } 1358 ctx->acdirmax = HZ * result.uint_32; 1359 break; 1360 case Opt_actimeo: 1361 if (result.uint_32 > CIFS_MAX_ACTIMEO / HZ) { 1362 cifs_errorf(fc, "timeout too large\n"); 1363 goto cifs_parse_mount_err; 1364 } 1365 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) || 1366 (ctx->acregmax != CIFS_DEF_ACTIMEO)) { 1367 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n"); 1368 break; 1369 } 1370 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32; 1371 break; 1372 case Opt_closetimeo: 1373 if (result.uint_32 > SMB3_MAX_DCLOSETIMEO / HZ) { 1374 cifs_errorf(fc, "closetimeo too large\n"); 1375 goto cifs_parse_mount_err; 1376 } 1377 ctx->closetimeo = HZ * result.uint_32; 1378 break; 1379 case Opt_echo_interval: 1380 if (result.uint_32 < SMB_ECHO_INTERVAL_MIN || 1381 result.uint_32 > SMB_ECHO_INTERVAL_MAX) { 1382 cifs_errorf(fc, "echo interval is out of bounds\n"); 1383 goto cifs_parse_mount_err; 1384 } 1385 ctx->echo_interval = result.uint_32; 1386 break; 1387 case Opt_snapshot: 1388 ctx->snapshot_time = result.uint_64; 1389 break; 1390 case Opt_max_credits: 1391 if (result.uint_32 < 20 || result.uint_32 > 60000) { 1392 cifs_errorf(fc, "%s: Invalid max_credits value\n", 1393 __func__); 1394 goto cifs_parse_mount_err; 1395 } 1396 ctx->max_credits = result.uint_32; 1397 break; 1398 case Opt_max_channels: 1399 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) { 1400 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n", 1401 __func__, CIFS_MAX_CHANNELS); 1402 goto cifs_parse_mount_err; 1403 } 1404 ctx->max_channels = result.uint_32; 1405 /* If more than one channel requested ... they want multichan */ 1406 if (result.uint_32 > 1) 1407 ctx->multichannel = true; 1408 break; 1409 case Opt_max_cached_dirs: 1410 if (result.uint_32 < 1) { 1411 cifs_errorf(fc, "%s: Invalid max_cached_dirs, needs to be 1 or more\n", 1412 __func__); 1413 goto cifs_parse_mount_err; 1414 } 1415 ctx->max_cached_dirs = result.uint_32; 1416 break; 1417 case Opt_handletimeout: 1418 ctx->handle_timeout = result.uint_32; 1419 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) { 1420 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n"); 1421 goto cifs_parse_mount_err; 1422 } 1423 break; 1424 case Opt_source: 1425 kfree(ctx->UNC); 1426 ctx->UNC = NULL; 1427 switch (smb3_parse_devname(param->string, ctx)) { 1428 case 0: 1429 break; 1430 case -ENOMEM: 1431 cifs_errorf(fc, "Unable to allocate memory for devname\n"); 1432 goto cifs_parse_mount_err; 1433 case -EINVAL: 1434 cifs_errorf(fc, "Malformed UNC in devname\n"); 1435 goto cifs_parse_mount_err; 1436 default: 1437 cifs_errorf(fc, "Unknown error parsing devname\n"); 1438 goto cifs_parse_mount_err; 1439 } 1440 ctx->source = smb3_fs_context_fullpath(ctx, '/'); 1441 if (IS_ERR(ctx->source)) { 1442 ctx->source = NULL; 1443 cifs_errorf(fc, "OOM when copying UNC string\n"); 1444 goto cifs_parse_mount_err; 1445 } 1446 fc->source = kstrdup(ctx->source, GFP_KERNEL); 1447 if (fc->source == NULL) { 1448 cifs_errorf(fc, "OOM when copying UNC string\n"); 1449 goto cifs_parse_mount_err; 1450 } 1451 hostname = extract_hostname(ctx->UNC); 1452 if (IS_ERR(hostname)) { 1453 cifs_errorf(fc, "Cannot extract hostname from UNC string\n"); 1454 goto cifs_parse_mount_err; 1455 } 1456 /* last byte, type, is 0x20 for servr type */ 1457 memset(ctx->target_rfc1001_name, 0x20, RFC1001_NAME_LEN_WITH_NULL); 1458 for (i = 0; i < RFC1001_NAME_LEN && hostname[i] != 0; i++) 1459 ctx->target_rfc1001_name[i] = toupper(hostname[i]); 1460 kfree(hostname); 1461 break; 1462 case Opt_user: 1463 kfree(ctx->username); 1464 ctx->username = NULL; 1465 if (ctx->nullauth) 1466 break; 1467 if (strlen(param->string) == 0) { 1468 /* null user, ie. anonymous authentication */ 1469 ctx->nullauth = 1; 1470 break; 1471 } 1472 1473 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) > 1474 CIFS_MAX_USERNAME_LEN) { 1475 pr_warn("username too long\n"); 1476 goto cifs_parse_mount_err; 1477 } 1478 ctx->username = no_free_ptr(param->string); 1479 break; 1480 case Opt_pass: 1481 kfree_sensitive(ctx->password); 1482 ctx->password = NULL; 1483 if (strlen(param->string) == 0) 1484 break; 1485 ctx->password = no_free_ptr(param->string); 1486 break; 1487 case Opt_pass2: 1488 kfree_sensitive(ctx->password2); 1489 ctx->password2 = NULL; 1490 if (strlen(param->string) == 0) 1491 break; 1492 ctx->password2 = no_free_ptr(param->string); 1493 break; 1494 case Opt_ip: 1495 if (strlen(param->string) == 0) { 1496 ctx->got_ip = false; 1497 break; 1498 } 1499 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr, 1500 param->string, 1501 strlen(param->string))) { 1502 pr_err("bad ip= option (%s)\n", param->string); 1503 goto cifs_parse_mount_err; 1504 } 1505 ctx->got_ip = true; 1506 break; 1507 case Opt_domain: 1508 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN) 1509 == CIFS_MAX_DOMAINNAME_LEN) { 1510 pr_warn("domain name too long\n"); 1511 goto cifs_parse_mount_err; 1512 } 1513 1514 kfree(ctx->domainname); 1515 ctx->domainname = no_free_ptr(param->string); 1516 cifs_dbg(FYI, "Domain name set\n"); 1517 break; 1518 case Opt_srcaddr: 1519 if (!cifs_convert_address( 1520 (struct sockaddr *)&ctx->srcaddr, 1521 param->string, strlen(param->string))) { 1522 pr_warn("Could not parse srcaddr: %s\n", 1523 param->string); 1524 goto cifs_parse_mount_err; 1525 } 1526 break; 1527 case Opt_iocharset: 1528 if (strnlen(param->string, 1024) >= 65) { 1529 pr_warn("iocharset name too long\n"); 1530 goto cifs_parse_mount_err; 1531 } 1532 1533 if (strncasecmp(param->string, "default", 7) != 0) { 1534 kfree(ctx->iocharset); 1535 ctx->iocharset = no_free_ptr(param->string); 1536 } 1537 /* if iocharset not set then load_nls_default 1538 * is used by caller 1539 */ 1540 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset); 1541 break; 1542 case Opt_netbiosname: 1543 memset(ctx->source_rfc1001_name, 0x20, 1544 RFC1001_NAME_LEN); 1545 /* 1546 * FIXME: are there cases in which a comma can 1547 * be valid in workstation netbios name (and 1548 * need special handling)? 1549 */ 1550 for (i = 0; i < RFC1001_NAME_LEN; i++) { 1551 /* don't ucase netbiosname for user */ 1552 if (param->string[i] == 0) 1553 break; 1554 ctx->source_rfc1001_name[i] = param->string[i]; 1555 } 1556 /* The string has 16th byte zero still from 1557 * set at top of the function 1558 */ 1559 if (i == RFC1001_NAME_LEN && param->string[i] != 0) 1560 pr_warn("netbiosname longer than 15 truncated\n"); 1561 break; 1562 case Opt_servern: 1563 /* last byte, type, is 0x20 for servr type */ 1564 memset(ctx->target_rfc1001_name, 0x20, 1565 RFC1001_NAME_LEN_WITH_NULL); 1566 /* 1567 * BB are there cases in which a comma can be valid in this 1568 * workstation netbios name (and need special handling)? 1569 */ 1570 1571 /* user or mount helper must uppercase the netbios name */ 1572 for (i = 0; i < 15; i++) { 1573 if (param->string[i] == 0) 1574 break; 1575 ctx->target_rfc1001_name[i] = param->string[i]; 1576 } 1577 1578 /* The string has 16th byte zero still from set at top of function */ 1579 if (i == RFC1001_NAME_LEN && param->string[i] != 0) 1580 pr_warn("server netbiosname longer than 15 truncated\n"); 1581 break; 1582 case Opt_nbsessinit: 1583 ctx->rfc1001_sessinit = !result.negated; 1584 cifs_dbg(FYI, "rfc1001_sessinit set to %d\n", ctx->rfc1001_sessinit); 1585 break; 1586 case Opt_ver: 1587 /* version of mount userspace tools, not dialect */ 1588 /* If interface changes in mount.cifs bump to new ver */ 1589 if (strncasecmp(param->string, "1", 1) == 0) { 1590 if (strlen(param->string) > 1) { 1591 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n", 1592 param->string); 1593 goto cifs_parse_mount_err; 1594 } 1595 /* This is the default */ 1596 break; 1597 } 1598 /* For all other value, error */ 1599 pr_warn("Invalid mount helper version specified\n"); 1600 goto cifs_parse_mount_err; 1601 case Opt_vers: 1602 /* protocol version (dialect) */ 1603 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0) 1604 goto cifs_parse_mount_err; 1605 ctx->got_version = true; 1606 break; 1607 case Opt_sec: 1608 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0) 1609 goto cifs_parse_mount_err; 1610 break; 1611 case Opt_upcalltarget: 1612 if (cifs_parse_upcall_target(fc, param->string, ctx) != 0) 1613 goto cifs_parse_mount_err; 1614 break; 1615 case Opt_cache: 1616 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0) 1617 goto cifs_parse_mount_err; 1618 break; 1619 case Opt_witness: 1620 #ifndef CONFIG_CIFS_SWN_UPCALL 1621 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n"); 1622 goto cifs_parse_mount_err; 1623 #endif 1624 ctx->witness = true; 1625 pr_warn_once("Witness protocol support is experimental\n"); 1626 break; 1627 case Opt_unicode: 1628 ctx->unicode = !result.negated; 1629 cifs_dbg(FYI, "unicode set to %d\n", ctx->unicode); 1630 break; 1631 case Opt_rootfs: 1632 #ifndef CONFIG_CIFS_ROOT 1633 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n"); 1634 goto cifs_parse_mount_err; 1635 #endif 1636 ctx->rootfs = true; 1637 break; 1638 case Opt_posixpaths: 1639 if (result.negated) 1640 ctx->posix_paths = 0; 1641 else 1642 ctx->posix_paths = 1; 1643 break; 1644 case Opt_unix: 1645 if (result.negated) { 1646 if (ctx->linux_ext == 1) 1647 pr_warn_once("conflicting posix mount options specified\n"); 1648 ctx->linux_ext = 0; 1649 ctx->no_linux_ext = 1; 1650 } else { 1651 if (ctx->no_linux_ext == 1) 1652 pr_warn_once("conflicting posix mount options specified\n"); 1653 ctx->linux_ext = 1; 1654 ctx->no_linux_ext = 0; 1655 ctx->nonativesocket = 1; /* POSIX mounts use NFS style reparse points */ 1656 } 1657 break; 1658 case Opt_nocase: 1659 ctx->nocase = 1; 1660 break; 1661 case Opt_brl: 1662 if (result.negated) { 1663 /* 1664 * turn off mandatory locking in mode 1665 * if remote locking is turned off since the 1666 * local vfs will do advisory 1667 */ 1668 if (ctx->file_mode == 1669 (S_IALLUGO & ~(S_ISUID | S_IXGRP))) 1670 ctx->file_mode = S_IALLUGO; 1671 ctx->nobrl = 1; 1672 } else 1673 ctx->nobrl = 0; 1674 break; 1675 case Opt_handlecache: 1676 if (result.negated) 1677 ctx->nohandlecache = 1; 1678 else 1679 ctx->nohandlecache = 0; 1680 break; 1681 case Opt_forcemandatorylock: 1682 ctx->mand_lock = 1; 1683 break; 1684 case Opt_setuids: 1685 ctx->setuids = result.negated; 1686 break; 1687 case Opt_intr: 1688 ctx->intr = !result.negated; 1689 break; 1690 case Opt_setuidfromacl: 1691 ctx->setuidfromacl = 1; 1692 break; 1693 case Opt_strictsync: 1694 ctx->nostrictsync = result.negated; 1695 break; 1696 case Opt_serverino: 1697 ctx->server_ino = !result.negated; 1698 break; 1699 case Opt_rwpidforward: 1700 ctx->rwpidforward = 1; 1701 break; 1702 case Opt_modesid: 1703 ctx->mode_ace = 1; 1704 break; 1705 case Opt_cifsacl: 1706 ctx->cifs_acl = !result.negated; 1707 break; 1708 case Opt_acl: 1709 ctx->no_psx_acl = result.negated; 1710 break; 1711 case Opt_locallease: 1712 ctx->local_lease = 1; 1713 break; 1714 case Opt_sign: 1715 ctx->sign = true; 1716 break; 1717 case Opt_ignore_signature: 1718 ctx->sign = true; 1719 ctx->ignore_signature = true; 1720 break; 1721 case Opt_seal: 1722 /* we do not do the following in secFlags because seal 1723 * is a per tree connection (mount) not a per socket 1724 * or per-smb connection option in the protocol 1725 * vol->secFlg |= CIFSSEC_MUST_SEAL; 1726 */ 1727 ctx->seal = 1; 1728 break; 1729 case Opt_noac: 1730 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); 1731 break; 1732 case Opt_fsc: 1733 #ifndef CONFIG_CIFS_FSCACHE 1734 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); 1735 goto cifs_parse_mount_err; 1736 #endif 1737 ctx->fsc = true; 1738 break; 1739 case Opt_mfsymlinks: 1740 ctx->mfsymlinks = true; 1741 break; 1742 case Opt_multiuser: 1743 ctx->multiuser = true; 1744 break; 1745 case Opt_sloppy: 1746 ctx->sloppy = true; 1747 break; 1748 case Opt_nosharesock: 1749 ctx->nosharesock = true; 1750 break; 1751 case Opt_persistent: 1752 if (result.negated) { 1753 ctx->nopersistent = true; 1754 if (ctx->persistent) { 1755 cifs_errorf(fc, "persistenthandles mount options conflict\n"); 1756 goto cifs_parse_mount_err; 1757 } 1758 } else { 1759 ctx->persistent = true; 1760 if ((ctx->nopersistent) || (ctx->resilient)) { 1761 cifs_errorf(fc, "persistenthandles mount options conflict\n"); 1762 goto cifs_parse_mount_err; 1763 } 1764 } 1765 break; 1766 case Opt_resilient: 1767 if (result.negated) { 1768 ctx->resilient = false; /* already the default */ 1769 } else { 1770 ctx->resilient = true; 1771 if (ctx->persistent) { 1772 cifs_errorf(fc, "persistenthandles mount options conflict\n"); 1773 goto cifs_parse_mount_err; 1774 } 1775 } 1776 break; 1777 case Opt_tcp_nodelay: 1778 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */ 1779 if (result.negated) 1780 ctx->sockopt_tcp_nodelay = false; 1781 else 1782 ctx->sockopt_tcp_nodelay = true; 1783 break; 1784 case Opt_domainauto: 1785 ctx->domainauto = true; 1786 break; 1787 case Opt_rdma: 1788 ctx->rdma = true; 1789 break; 1790 case Opt_reparse: 1791 if (parse_reparse_flavor(fc, param->string, ctx)) 1792 goto cifs_parse_mount_err; 1793 break; 1794 case Opt_nativesocket: 1795 ctx->nonativesocket = result.negated; 1796 break; 1797 case Opt_symlink: 1798 if (parse_symlink_flavor(fc, param->string, ctx)) 1799 goto cifs_parse_mount_err; 1800 break; 1801 case Opt_symlinkroot: 1802 if (param->string[0] != '/') { 1803 cifs_errorf(fc, "symlinkroot mount options must be absolute path\n"); 1804 goto cifs_parse_mount_err; 1805 } 1806 if (strnlen(param->string, PATH_MAX) == PATH_MAX) { 1807 cifs_errorf(fc, "symlinkroot path too long (max path length: %u)\n", 1808 PATH_MAX - 1); 1809 goto cifs_parse_mount_err; 1810 } 1811 kfree(ctx->symlinkroot); 1812 ctx->symlinkroot = param->string; 1813 param->string = NULL; 1814 break; 1815 } 1816 /* case Opt_ignore: - is ignored as expected ... */ 1817 1818 if (ctx->multiuser && ctx->upcall_target == UPTARGET_MOUNT) { 1819 cifs_errorf(fc, "multiuser mount option not supported with upcalltarget set as 'mount'\n"); 1820 goto cifs_parse_mount_err; 1821 } 1822 1823 return 0; 1824 1825 cifs_parse_mount_err: 1826 kfree_sensitive(ctx->password); 1827 ctx->password = NULL; 1828 kfree_sensitive(ctx->password2); 1829 ctx->password2 = NULL; 1830 return -EINVAL; 1831 } 1832 1833 int smb3_init_fs_context(struct fs_context *fc) 1834 { 1835 struct smb3_fs_context *ctx; 1836 char *nodename = utsname()->nodename; 1837 int i; 1838 1839 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL); 1840 if (unlikely(!ctx)) 1841 return -ENOMEM; 1842 1843 strscpy(ctx->workstation_name, nodename, sizeof(ctx->workstation_name)); 1844 1845 /* 1846 * does not have to be perfect mapping since field is 1847 * informational, only used for servers that do not support 1848 * port 445 and it can be overridden at mount time 1849 */ 1850 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); 1851 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) 1852 ctx->source_rfc1001_name[i] = toupper(nodename[i]); 1853 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0; 1854 1855 /* 1856 * null target name indicates to use *SMBSERVR default called name 1857 * if we end up sending RFC1001 session initialize 1858 */ 1859 ctx->target_rfc1001_name[0] = 0; 1860 1861 ctx->rfc1001_sessinit = -1; /* autodetect based on port number */ 1862 1863 ctx->cred_uid = current_uid(); 1864 ctx->linux_uid = current_uid(); 1865 ctx->linux_gid = current_gid(); 1866 /* By default 4MB read ahead size, 1MB block size */ 1867 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */ 1868 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */ 1869 1870 /* 1871 * default to SFM style remapping of seven reserved characters 1872 * unless user overrides it or we negotiate CIFS POSIX where 1873 * it is unnecessary. Can not simultaneously use more than one mapping 1874 * since then readdir could list files that open could not open 1875 */ 1876 ctx->remap = true; 1877 1878 /* default to only allowing write access to owner of the mount */ 1879 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; 1880 1881 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */ 1882 /* default is always to request posix paths. */ 1883 ctx->posix_paths = 1; 1884 /* default to using server inode numbers where available */ 1885 ctx->server_ino = 1; 1886 1887 /* default is to use strict cifs caching semantics */ 1888 ctx->strict_io = true; 1889 1890 ctx->acregmax = CIFS_DEF_ACTIMEO; 1891 ctx->acdirmax = CIFS_DEF_ACTIMEO; 1892 ctx->closetimeo = SMB3_DEF_DCLOSETIMEO; 1893 ctx->max_cached_dirs = MAX_CACHED_FIDS; 1894 /* Most clients set timeout to 0, allows server to use its default */ 1895 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */ 1896 1897 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */ 1898 ctx->ops = &smb30_operations; 1899 ctx->vals = &smbdefault_values; 1900 1901 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; 1902 1903 /* default to no multichannel (single server connection) */ 1904 ctx->multichannel = false; 1905 ctx->max_channels = 1; 1906 1907 ctx->backupuid_specified = false; /* no backup intent for a user */ 1908 ctx->backupgid_specified = false; /* no backup intent for a group */ 1909 1910 ctx->retrans = 1; 1911 ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT; 1912 ctx->symlink_type = CIFS_SYMLINK_TYPE_DEFAULT; 1913 ctx->nonativesocket = 0; 1914 1915 ctx->unicode = -1; /* autodetect, but prefer UNICODE mode */ 1916 1917 /* 1918 * short int override_uid = -1; 1919 * short int override_gid = -1; 1920 * char *nodename = strdup(utsname()->nodename); 1921 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; 1922 */ 1923 1924 fc->fs_private = ctx; 1925 fc->ops = &smb3_fs_context_ops; 1926 return 0; 1927 } 1928 1929 void 1930 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx) 1931 { 1932 if (ctx == NULL) 1933 return; 1934 1935 /* 1936 * Make sure this stays in sync with smb3_fs_context_dup() 1937 */ 1938 kfree(ctx->username); 1939 ctx->username = NULL; 1940 kfree_sensitive(ctx->password); 1941 ctx->password = NULL; 1942 kfree_sensitive(ctx->password2); 1943 ctx->password2 = NULL; 1944 kfree(ctx->server_hostname); 1945 ctx->server_hostname = NULL; 1946 kfree(ctx->UNC); 1947 ctx->UNC = NULL; 1948 kfree(ctx->source); 1949 ctx->source = NULL; 1950 kfree(ctx->domainname); 1951 ctx->domainname = NULL; 1952 kfree(ctx->nodename); 1953 ctx->nodename = NULL; 1954 kfree(ctx->iocharset); 1955 ctx->iocharset = NULL; 1956 kfree(ctx->prepath); 1957 ctx->prepath = NULL; 1958 kfree(ctx->leaf_fullpath); 1959 ctx->leaf_fullpath = NULL; 1960 kfree(ctx->dns_dom); 1961 ctx->dns_dom = NULL; 1962 kfree(ctx->symlinkroot); 1963 ctx->symlinkroot = NULL; 1964 } 1965 1966 void 1967 smb3_cleanup_fs_context(struct smb3_fs_context *ctx) 1968 { 1969 if (!ctx) 1970 return; 1971 smb3_cleanup_fs_context_contents(ctx); 1972 kfree(ctx); 1973 } 1974 1975 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb) 1976 { 1977 struct smb3_fs_context *ctx = cifs_sb->ctx; 1978 1979 if (ctx->nodfs) 1980 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS; 1981 else 1982 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS; 1983 1984 if (ctx->noperm) 1985 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; 1986 else 1987 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM; 1988 1989 if (ctx->setuids) 1990 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; 1991 else 1992 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID; 1993 1994 if (ctx->setuidfromacl) 1995 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; 1996 else 1997 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL; 1998 1999 if (ctx->server_ino) 2000 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; 2001 else 2002 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; 2003 2004 if (ctx->remap) 2005 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; 2006 else 2007 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR; 2008 2009 if (ctx->sfu_remap) 2010 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; 2011 else 2012 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR; 2013 2014 if (ctx->no_xattr) 2015 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; 2016 else 2017 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR; 2018 2019 if (ctx->sfu_emul) 2020 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; 2021 else 2022 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL; 2023 2024 if (ctx->nobrl) 2025 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; 2026 else 2027 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL; 2028 2029 if (ctx->nohandlecache) 2030 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE; 2031 else 2032 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE; 2033 2034 if (ctx->nostrictsync) 2035 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; 2036 else 2037 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC; 2038 2039 if (ctx->mand_lock) 2040 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; 2041 else 2042 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL; 2043 2044 if (ctx->rwpidforward) 2045 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; 2046 else 2047 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD; 2048 2049 if (ctx->mode_ace) 2050 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID; 2051 else 2052 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID; 2053 2054 if (ctx->cifs_acl) 2055 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; 2056 else 2057 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL; 2058 2059 if (ctx->backupuid_specified) 2060 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; 2061 else 2062 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID; 2063 2064 if (ctx->backupgid_specified) 2065 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; 2066 else 2067 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID; 2068 2069 if (ctx->override_uid) 2070 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; 2071 else 2072 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID; 2073 2074 if (ctx->override_gid) 2075 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; 2076 else 2077 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID; 2078 2079 if (ctx->dynperm) 2080 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; 2081 else 2082 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM; 2083 2084 if (ctx->fsc) 2085 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; 2086 else 2087 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE; 2088 2089 if (ctx->multiuser) 2090 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | 2091 CIFS_MOUNT_NO_PERM); 2092 else 2093 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER; 2094 2095 2096 if (ctx->strict_io) 2097 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; 2098 else 2099 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO; 2100 2101 if (ctx->direct_io) 2102 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; 2103 else 2104 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO; 2105 2106 if (ctx->mfsymlinks) 2107 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; 2108 else 2109 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS; 2110 if (ctx->mfsymlinks) { 2111 if (ctx->sfu_emul) { 2112 /* 2113 * Our SFU ("Services for Unix") emulation allows now 2114 * creating new and reading existing SFU symlinks. 2115 * Older Linux kernel versions were not able to neither 2116 * read existing nor create new SFU symlinks. But 2117 * creating and reading SFU style mknod and FIFOs was 2118 * supported for long time. When "mfsymlinks" and 2119 * "sfu" are both enabled at the same time, it allows 2120 * reading both types of symlinks, but will only create 2121 * them with mfsymlinks format. This allows better 2122 * Apple compatibility, compatibility with older Linux 2123 * kernel clients (probably better for Samba too) 2124 * while still recognizing old Windows style symlinks. 2125 */ 2126 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); 2127 } 2128 } 2129 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN; 2130 2131 return; 2132 } 2133