1 // SPDX-License-Identifier: LGPL-2.1 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002, 2011 5 * Etersoft, 2012 6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org), 7 * Steve French (sfrench@us.ibm.com) 8 * 9 */ 10 #include <linux/fs.h> 11 #include <linux/stat.h> 12 #include <linux/slab.h> 13 #include <linux/pagemap.h> 14 #include <asm/div64.h> 15 #include "cifsfs.h" 16 #include "cifsglob.h" 17 #include "cifsproto.h" 18 #include "cifs_debug.h" 19 #include "cifs_fs_sb.h" 20 #include "cifs_unicode.h" 21 #include "fscache.h" 22 #include "smb2glob.h" 23 #include "smb2proto.h" 24 #include "cached_dir.h" 25 #include "../common/smb2status.h" 26 #include "../common/smbfsctl.h" 27 28 static struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov) 29 { 30 struct reparse_data_buffer *buf; 31 struct smb2_ioctl_rsp *io = iov->iov_base; 32 u32 off, count, len; 33 u16 rdlen; 34 35 count = le32_to_cpu(io->OutputCount); 36 off = le32_to_cpu(io->OutputOffset); 37 if (check_add_overflow(off, count, &len) || len > iov->iov_len) 38 return ERR_PTR(smb_EIO2(smb_eio_trace_reparse_overlong, 39 off, count)); 40 41 buf = (struct reparse_data_buffer *)((u8 *)io + off); 42 len = sizeof(*buf); 43 rdlen = le16_to_cpu(buf->ReparseDataLength); 44 45 if (count < len || count < rdlen + len) 46 return ERR_PTR(smb_EIO2(smb_eio_trace_reparse_rdlen, count, rdlen)); 47 return buf; 48 } 49 50 static inline __u32 file_create_options(struct dentry *dentry) 51 { 52 struct cifsInodeInfo *ci; 53 54 if (dentry) { 55 ci = CIFS_I(d_inode(dentry)); 56 if (ci->cifsAttrs & ATTR_REPARSE_POINT) 57 return OPEN_REPARSE_POINT; 58 } 59 return 0; 60 } 61 62 /* Parse owner and group from SMB3.1.1 POSIX query info */ 63 static int parse_posix_sids(struct cifs_open_info_data *data, 64 struct kvec *rsp_iov) 65 { 66 struct smb2_query_info_rsp *qi = rsp_iov->iov_base; 67 unsigned int out_len = le32_to_cpu(qi->OutputBufferLength); 68 unsigned int qi_len = sizeof(data->posix_fi); 69 int owner_len, group_len; 70 u8 *sidsbuf, *sidsbuf_end; 71 72 if (out_len <= qi_len) 73 return -EINVAL; 74 75 sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len; 76 sidsbuf_end = sidsbuf + out_len - qi_len; 77 78 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end); 79 if (owner_len == -1) 80 return -EINVAL; 81 82 memcpy(&data->posix_owner, sidsbuf, owner_len); 83 group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end); 84 if (group_len == -1) 85 return -EINVAL; 86 87 memcpy(&data->posix_group, sidsbuf + owner_len, group_len); 88 return 0; 89 } 90 91 struct wsl_query_ea { 92 __le32 next; 93 __u8 name_len; 94 __u8 name[SMB2_WSL_XATTR_NAME_LEN + 1]; 95 } __packed; 96 97 #define NEXT_OFF cpu_to_le32(sizeof(struct wsl_query_ea)) 98 99 static const struct wsl_query_ea wsl_query_eas[] = { 100 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_UID, }, 101 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_GID, }, 102 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_MODE, }, 103 { .next = 0, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_DEV, }, 104 }; 105 106 static int check_wsl_eas(struct kvec *rsp_iov) 107 { 108 struct smb2_file_full_ea_info *ea; 109 struct smb2_query_info_rsp *rsp = rsp_iov->iov_base; 110 unsigned long addr; 111 u32 outlen, next; 112 u16 vlen; 113 u8 nlen; 114 u8 *end; 115 116 outlen = le32_to_cpu(rsp->OutputBufferLength); 117 if (outlen < SMB2_WSL_MIN_QUERY_EA_RESP_SIZE || 118 outlen > SMB2_WSL_MAX_QUERY_EA_RESP_SIZE) 119 return -EINVAL; 120 121 ea = (void *)((u8 *)rsp_iov->iov_base + 122 le16_to_cpu(rsp->OutputBufferOffset)); 123 end = (u8 *)rsp_iov->iov_base + rsp_iov->iov_len; 124 for (;;) { 125 if ((u8 *)ea > end - sizeof(*ea)) 126 return -EINVAL; 127 128 nlen = ea->ea_name_length; 129 vlen = le16_to_cpu(ea->ea_value_length); 130 if (nlen != SMB2_WSL_XATTR_NAME_LEN || 131 (u8 *)ea + nlen + 1 + vlen > end) 132 return -EINVAL; 133 134 switch (vlen) { 135 case 4: 136 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) && 137 strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) && 138 strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen)) 139 return -EINVAL; 140 break; 141 case 8: 142 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen)) 143 return -EINVAL; 144 break; 145 case 0: 146 if (!strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) || 147 !strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) || 148 !strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen) || 149 !strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen)) 150 break; 151 fallthrough; 152 default: 153 return -EINVAL; 154 } 155 156 next = le32_to_cpu(ea->next_entry_offset); 157 if (!next) 158 break; 159 if (!IS_ALIGNED(next, 4) || 160 check_add_overflow((unsigned long)ea, next, &addr)) 161 return -EINVAL; 162 ea = (void *)addr; 163 } 164 return 0; 165 } 166 167 /* 168 * note: If cfile is passed, the reference to it is dropped here. 169 * So make sure that you do not reuse cfile after return from this func. 170 * 171 * If passing @out_iov and @out_buftype, ensure to make them both large enough 172 * (>= 3) to hold all compounded responses. Caller is also responsible for 173 * freeing them up with free_rsp_buf(). 174 */ 175 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, 176 struct cifs_sb_info *cifs_sb, const char *full_path, 177 struct cifs_open_parms *oparms, struct kvec *in_iov, 178 int *cmds, int num_cmds, struct cifsFileInfo *cfile, 179 struct kvec *out_iov, int *out_buftype, struct dentry *dentry) 180 { 181 182 struct smb2_create_rsp *create_rsp = NULL; 183 struct smb2_query_info_rsp *qi_rsp = NULL; 184 struct smb2_compound_vars *vars = NULL; 185 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 186 struct cifs_open_info_data *idata; 187 struct cifs_ses *ses = tcon->ses; 188 struct reparse_data_buffer *rbuf; 189 struct TCP_Server_Info *server; 190 int resp_buftype[MAX_COMPOUND]; 191 int retries = 0, cur_sleep = 0; 192 __u8 delete_pending[8] = {1,}; 193 struct kvec *rsp_iov, *iov; 194 struct inode *inode = NULL; 195 __le16 *utf16_path = NULL; 196 struct smb_rqst *rqst; 197 unsigned int size[2]; 198 struct cifs_fid fid; 199 int num_rqst = 0, i; 200 unsigned int len; 201 int tmp_rc, rc; 202 int flags = 0; 203 void *data[2]; 204 205 replay_again: 206 /* reinitialize for possible replay */ 207 flags = 0; 208 oplock = SMB2_OPLOCK_LEVEL_NONE; 209 num_rqst = 0; 210 server = cifs_pick_channel(ses); 211 212 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 213 if (vars == NULL) { 214 rc = -ENOMEM; 215 goto out; 216 } 217 rqst = &vars->rqst[0]; 218 rsp_iov = &vars->rsp_iov[0]; 219 220 if (smb3_encryption_required(tcon)) 221 flags |= CIFS_TRANSFORM_REQ; 222 223 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++) 224 resp_buftype[i] = CIFS_NO_BUFFER; 225 226 /* We already have a handle so we can skip the open */ 227 if (cfile) 228 goto after_open; 229 230 /* Open */ 231 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 232 if (!utf16_path) { 233 rc = -ENOMEM; 234 goto finished; 235 } 236 237 /* if there is an existing lease, reuse it */ 238 239 /* 240 * note: files with hardlinks cause unexpected behaviour. As per MS-SMB2, 241 * lease keys are associated with the filepath. We are maintaining lease keys 242 * with the inode on the client. If the file has hardlinks, it is possible 243 * that the lease for a file be reused for an operation on its hardlink or 244 * vice versa. 245 * As a workaround, send request using an existing lease key and if the server 246 * returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request 247 * again without the lease. 248 */ 249 if (dentry) { 250 inode = d_inode(dentry); 251 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) { 252 oplock = SMB2_OPLOCK_LEVEL_LEASE; 253 server->ops->get_lease_key(inode, &fid); 254 } 255 } 256 257 vars->oparms = *oparms; 258 vars->oparms.fid = &fid; 259 260 rqst[num_rqst].rq_iov = &vars->open_iov[0]; 261 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE; 262 rc = SMB2_open_init(tcon, server, 263 &rqst[num_rqst], &oplock, &vars->oparms, 264 utf16_path); 265 kfree(utf16_path); 266 if (rc) 267 goto finished; 268 269 smb2_set_next_command(tcon, &rqst[num_rqst]); 270 after_open: 271 num_rqst++; 272 rc = 0; 273 274 i = 0; 275 276 /* Skip the leading explicit OPEN operation */ 277 if (num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) 278 i++; 279 280 for (; i < num_cmds; i++) { 281 /* Operation */ 282 switch (cmds[i]) { 283 case SMB2_OP_QUERY_INFO: 284 rqst[num_rqst].rq_iov = &vars->qi_iov; 285 rqst[num_rqst].rq_nvec = 1; 286 287 if (cfile) { 288 rc = SMB2_query_info_init(tcon, server, 289 &rqst[num_rqst], 290 cfile->fid.persistent_fid, 291 cfile->fid.volatile_fid, 292 FILE_ALL_INFORMATION, 293 SMB2_O_INFO_FILE, 0, 294 sizeof(struct smb2_file_all_info) + 295 PATH_MAX * 2, 0, NULL); 296 } else { 297 rc = SMB2_query_info_init(tcon, server, 298 &rqst[num_rqst], 299 COMPOUND_FID, 300 COMPOUND_FID, 301 FILE_ALL_INFORMATION, 302 SMB2_O_INFO_FILE, 0, 303 sizeof(struct smb2_file_all_info) + 304 PATH_MAX * 2, 0, NULL); 305 } 306 if (!rc && (!cfile || num_rqst > 1)) { 307 smb2_set_next_command(tcon, &rqst[num_rqst]); 308 smb2_set_related(&rqst[num_rqst]); 309 } else if (rc) { 310 goto finished; 311 } 312 num_rqst++; 313 trace_smb3_query_info_compound_enter(xid, tcon->tid, 314 ses->Suid, full_path); 315 break; 316 case SMB2_OP_POSIX_QUERY_INFO: 317 rqst[num_rqst].rq_iov = &vars->qi_iov; 318 rqst[num_rqst].rq_nvec = 1; 319 320 if (cfile) { 321 /* TBD: fix following to allow for longer SIDs */ 322 rc = SMB2_query_info_init(tcon, server, 323 &rqst[num_rqst], 324 cfile->fid.persistent_fid, 325 cfile->fid.volatile_fid, 326 SMB_FIND_FILE_POSIX_INFO, 327 SMB2_O_INFO_FILE, 0, 328 sizeof(struct smb311_posix_qinfo *) + 329 (PATH_MAX * 2) + 330 (sizeof(struct smb_sid) * 2), 0, NULL); 331 } else { 332 rc = SMB2_query_info_init(tcon, server, 333 &rqst[num_rqst], 334 COMPOUND_FID, 335 COMPOUND_FID, 336 SMB_FIND_FILE_POSIX_INFO, 337 SMB2_O_INFO_FILE, 0, 338 sizeof(struct smb311_posix_qinfo *) + 339 (PATH_MAX * 2) + 340 (sizeof(struct smb_sid) * 2), 0, NULL); 341 } 342 if (!rc && (!cfile || num_rqst > 1)) { 343 smb2_set_next_command(tcon, &rqst[num_rqst]); 344 smb2_set_related(&rqst[num_rqst]); 345 } else if (rc) { 346 goto finished; 347 } 348 num_rqst++; 349 trace_smb3_posix_query_info_compound_enter(xid, tcon->tid, 350 ses->Suid, full_path); 351 break; 352 case SMB2_OP_MKDIR: 353 /* 354 * Directories are created through parameters in the 355 * SMB2_open() call. 356 */ 357 trace_smb3_mkdir_enter(xid, tcon->tid, ses->Suid, full_path); 358 break; 359 case SMB2_OP_UNLINK: 360 rqst[num_rqst].rq_iov = vars->unlink_iov; 361 rqst[num_rqst].rq_nvec = 1; 362 363 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ 364 data[0] = &delete_pending[0]; 365 366 if (cfile) { 367 rc = SMB2_set_info_init(tcon, server, 368 &rqst[num_rqst], 369 cfile->fid.persistent_fid, 370 cfile->fid.volatile_fid, 371 current->tgid, 372 FILE_DISPOSITION_INFORMATION, 373 SMB2_O_INFO_FILE, 0, 374 data, size); 375 } else { 376 rc = SMB2_set_info_init(tcon, server, 377 &rqst[num_rqst], 378 COMPOUND_FID, 379 COMPOUND_FID, 380 current->tgid, 381 FILE_DISPOSITION_INFORMATION, 382 SMB2_O_INFO_FILE, 0, 383 data, size); 384 } 385 if (!rc && (!cfile || num_rqst > 1)) { 386 smb2_set_next_command(tcon, &rqst[num_rqst]); 387 smb2_set_related(&rqst[num_rqst]); 388 } else if (rc) { 389 goto finished; 390 } 391 num_rqst++; 392 trace_smb3_unlink_enter(xid, tcon->tid, ses->Suid, full_path); 393 break; 394 case SMB2_OP_SET_EOF: 395 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 396 rqst[num_rqst].rq_nvec = 1; 397 398 size[0] = in_iov[i].iov_len; 399 data[0] = in_iov[i].iov_base; 400 401 if (cfile) { 402 rc = SMB2_set_info_init(tcon, server, 403 &rqst[num_rqst], 404 cfile->fid.persistent_fid, 405 cfile->fid.volatile_fid, 406 current->tgid, 407 FILE_END_OF_FILE_INFORMATION, 408 SMB2_O_INFO_FILE, 0, 409 data, size); 410 } else { 411 rc = SMB2_set_info_init(tcon, server, 412 &rqst[num_rqst], 413 COMPOUND_FID, 414 COMPOUND_FID, 415 current->tgid, 416 FILE_END_OF_FILE_INFORMATION, 417 SMB2_O_INFO_FILE, 0, 418 data, size); 419 } 420 if (!rc && (!cfile || num_rqst > 1)) { 421 smb2_set_next_command(tcon, &rqst[num_rqst]); 422 smb2_set_related(&rqst[num_rqst]); 423 } else if (rc) { 424 goto finished; 425 } 426 num_rqst++; 427 trace_smb3_set_eof_enter(xid, tcon->tid, ses->Suid, full_path); 428 break; 429 case SMB2_OP_SET_INFO: 430 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 431 rqst[num_rqst].rq_nvec = 1; 432 433 size[0] = in_iov[i].iov_len; 434 data[0] = in_iov[i].iov_base; 435 436 if (cfile) { 437 rc = SMB2_set_info_init(tcon, server, 438 &rqst[num_rqst], 439 cfile->fid.persistent_fid, 440 cfile->fid.volatile_fid, current->tgid, 441 FILE_BASIC_INFORMATION, 442 SMB2_O_INFO_FILE, 0, data, size); 443 } else { 444 rc = SMB2_set_info_init(tcon, server, 445 &rqst[num_rqst], 446 COMPOUND_FID, 447 COMPOUND_FID, current->tgid, 448 FILE_BASIC_INFORMATION, 449 SMB2_O_INFO_FILE, 0, data, size); 450 } 451 if (!rc && (!cfile || num_rqst > 1)) { 452 smb2_set_next_command(tcon, &rqst[num_rqst]); 453 smb2_set_related(&rqst[num_rqst]); 454 } else if (rc) { 455 goto finished; 456 } 457 num_rqst++; 458 trace_smb3_set_info_compound_enter(xid, tcon->tid, 459 ses->Suid, full_path); 460 break; 461 case SMB2_OP_RENAME: 462 rqst[num_rqst].rq_iov = vars->rename_iov; 463 rqst[num_rqst].rq_nvec = 2; 464 465 len = in_iov[i].iov_len; 466 467 vars->rename_info.ReplaceIfExists = 1; 468 vars->rename_info.RootDirectory = 0; 469 vars->rename_info.FileNameLength = cpu_to_le32(len); 470 471 size[0] = sizeof(struct smb2_file_rename_info); 472 data[0] = &vars->rename_info; 473 474 size[1] = len + 2 /* null */; 475 data[1] = in_iov[i].iov_base; 476 477 if (cfile) { 478 rc = SMB2_set_info_init(tcon, server, 479 &rqst[num_rqst], 480 cfile->fid.persistent_fid, 481 cfile->fid.volatile_fid, 482 current->tgid, FILE_RENAME_INFORMATION, 483 SMB2_O_INFO_FILE, 0, data, size); 484 } else { 485 rc = SMB2_set_info_init(tcon, server, 486 &rqst[num_rqst], 487 COMPOUND_FID, COMPOUND_FID, 488 current->tgid, FILE_RENAME_INFORMATION, 489 SMB2_O_INFO_FILE, 0, data, size); 490 } 491 if (!rc && (!cfile || num_rqst > 1)) { 492 smb2_set_next_command(tcon, &rqst[num_rqst]); 493 smb2_set_related(&rqst[num_rqst]); 494 } else if (rc) { 495 goto finished; 496 } 497 num_rqst++; 498 trace_smb3_rename_enter(xid, tcon->tid, ses->Suid, full_path); 499 break; 500 case SMB2_OP_HARDLINK: 501 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 502 rqst[num_rqst].rq_nvec = 2; 503 504 len = in_iov[i].iov_len; 505 506 vars->link_info.ReplaceIfExists = 0; 507 vars->link_info.RootDirectory = 0; 508 vars->link_info.FileNameLength = cpu_to_le32(len); 509 510 size[0] = sizeof(struct smb2_file_link_info); 511 data[0] = &vars->link_info; 512 513 size[1] = len + 2 /* null */; 514 data[1] = in_iov[i].iov_base; 515 516 rc = SMB2_set_info_init(tcon, server, 517 &rqst[num_rqst], COMPOUND_FID, 518 COMPOUND_FID, current->tgid, 519 FILE_LINK_INFORMATION, 520 SMB2_O_INFO_FILE, 0, data, size); 521 if (rc) 522 goto finished; 523 smb2_set_next_command(tcon, &rqst[num_rqst]); 524 smb2_set_related(&rqst[num_rqst++]); 525 trace_smb3_hardlink_enter(xid, tcon->tid, ses->Suid, full_path); 526 break; 527 case SMB2_OP_SET_REPARSE: 528 rqst[num_rqst].rq_iov = vars->io_iov; 529 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov); 530 531 if (cfile) { 532 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 533 cfile->fid.persistent_fid, 534 cfile->fid.volatile_fid, 535 FSCTL_SET_REPARSE_POINT, 536 in_iov[i].iov_base, 537 in_iov[i].iov_len, 0); 538 } else { 539 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 540 COMPOUND_FID, COMPOUND_FID, 541 FSCTL_SET_REPARSE_POINT, 542 in_iov[i].iov_base, 543 in_iov[i].iov_len, 0); 544 } 545 if (!rc && (!cfile || num_rqst > 1)) { 546 smb2_set_next_command(tcon, &rqst[num_rqst]); 547 smb2_set_related(&rqst[num_rqst]); 548 } else if (rc) { 549 goto finished; 550 } 551 num_rqst++; 552 trace_smb3_set_reparse_compound_enter(xid, tcon->tid, 553 ses->Suid, full_path); 554 break; 555 case SMB2_OP_GET_REPARSE: 556 rqst[num_rqst].rq_iov = vars->io_iov; 557 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov); 558 559 if (cfile) { 560 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 561 cfile->fid.persistent_fid, 562 cfile->fid.volatile_fid, 563 FSCTL_GET_REPARSE_POINT, 564 NULL, 0, CIFSMaxBufSize); 565 } else { 566 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 567 COMPOUND_FID, COMPOUND_FID, 568 FSCTL_GET_REPARSE_POINT, 569 NULL, 0, CIFSMaxBufSize); 570 } 571 if (!rc && (!cfile || num_rqst > 1)) { 572 smb2_set_next_command(tcon, &rqst[num_rqst]); 573 smb2_set_related(&rqst[num_rqst]); 574 } else if (rc) { 575 goto finished; 576 } 577 num_rqst++; 578 trace_smb3_get_reparse_compound_enter(xid, tcon->tid, 579 ses->Suid, full_path); 580 break; 581 case SMB2_OP_QUERY_WSL_EA: 582 rqst[num_rqst].rq_iov = &vars->ea_iov; 583 rqst[num_rqst].rq_nvec = 1; 584 585 if (cfile) { 586 rc = SMB2_query_info_init(tcon, server, 587 &rqst[num_rqst], 588 cfile->fid.persistent_fid, 589 cfile->fid.volatile_fid, 590 FILE_FULL_EA_INFORMATION, 591 SMB2_O_INFO_FILE, 0, 592 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE, 593 sizeof(wsl_query_eas), 594 (void *)wsl_query_eas); 595 } else { 596 rc = SMB2_query_info_init(tcon, server, 597 &rqst[num_rqst], 598 COMPOUND_FID, 599 COMPOUND_FID, 600 FILE_FULL_EA_INFORMATION, 601 SMB2_O_INFO_FILE, 0, 602 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE, 603 sizeof(wsl_query_eas), 604 (void *)wsl_query_eas); 605 } 606 if (!rc && (!cfile || num_rqst > 1)) { 607 smb2_set_next_command(tcon, &rqst[num_rqst]); 608 smb2_set_related(&rqst[num_rqst]); 609 } else if (rc) { 610 goto finished; 611 } 612 num_rqst++; 613 trace_smb3_query_wsl_ea_compound_enter(xid, tcon->tid, 614 ses->Suid, full_path); 615 break; 616 default: 617 cifs_dbg(VFS, "Invalid command\n"); 618 rc = -EINVAL; 619 } 620 } 621 if (rc) 622 goto finished; 623 624 /* We already have a handle so we can skip the close */ 625 if (cfile) 626 goto after_close; 627 /* Close */ 628 flags |= CIFS_CP_CREATE_CLOSE_OP; 629 rqst[num_rqst].rq_iov = &vars->close_iov; 630 rqst[num_rqst].rq_nvec = 1; 631 rc = SMB2_close_init(tcon, server, 632 &rqst[num_rqst], COMPOUND_FID, 633 COMPOUND_FID, false); 634 smb2_set_related(&rqst[num_rqst]); 635 if (rc) 636 goto finished; 637 after_close: 638 num_rqst++; 639 640 if (cfile) { 641 if (retries) { 642 /* Back-off before retry */ 643 if (cur_sleep) 644 msleep(cur_sleep); 645 for (i = 1; i < num_rqst - 2; i++) 646 smb2_set_replay(server, &rqst[i]); 647 } 648 649 rc = compound_send_recv(xid, ses, server, 650 flags, num_rqst - 2, 651 &rqst[1], &resp_buftype[1], 652 &rsp_iov[1]); 653 } else { 654 if (retries) { 655 /* Back-off before retry */ 656 if (cur_sleep) 657 msleep(cur_sleep); 658 for (i = 0; i < num_rqst; i++) 659 smb2_set_replay(server, &rqst[i]); 660 } 661 662 rc = compound_send_recv(xid, ses, server, 663 flags, num_rqst, 664 rqst, resp_buftype, 665 rsp_iov); 666 } 667 668 finished: 669 num_rqst = 0; 670 SMB2_open_free(&rqst[num_rqst++]); 671 if (rc == -EREMCHG) { 672 pr_warn_once("server share %s deleted\n", tcon->tree_name); 673 tcon->need_reconnect = true; 674 } 675 676 tmp_rc = rc; 677 678 if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) { 679 create_rsp = rsp_iov[0].iov_base; 680 idata = in_iov[0].iov_base; 681 idata->fi.CreationTime = create_rsp->CreationTime; 682 idata->fi.LastAccessTime = create_rsp->LastAccessTime; 683 idata->fi.LastWriteTime = create_rsp->LastWriteTime; 684 idata->fi.ChangeTime = create_rsp->ChangeTime; 685 idata->fi.Attributes = create_rsp->FileAttributes; 686 idata->fi.AllocationSize = create_rsp->AllocationSize; 687 idata->fi.EndOfFile = create_rsp->EndofFile; 688 if (le32_to_cpu(idata->fi.NumberOfLinks) == 0) 689 idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */ 690 idata->fi.DeletePending = 0; /* successful open = not delete pending */ 691 idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY); 692 693 /* smb2_parse_contexts() fills idata->fi.IndexNumber */ 694 rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch, 695 oparms->fid->lease_key, &oplock, &idata->fi, NULL); 696 if (rc) 697 cifs_dbg(VFS, "rc: %d parsing context of compound op\n", rc); 698 } 699 700 for (i = 0; i < num_cmds; i++) { 701 char *buf = rsp_iov[i + 1].iov_base; 702 703 if (buf && resp_buftype[i + 1] != CIFS_NO_BUFFER) 704 rc = server->ops->map_error(buf, false); 705 else 706 rc = tmp_rc; 707 switch (cmds[i]) { 708 case SMB2_OP_QUERY_INFO: 709 idata = in_iov[i].iov_base; 710 idata->contains_posix_file_info = false; 711 if (rc == 0 && cfile && cfile->symlink_target) { 712 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 713 if (!idata->symlink_target) 714 rc = -ENOMEM; 715 } 716 if (rc == 0) { 717 qi_rsp = (struct smb2_query_info_rsp *) 718 rsp_iov[i + 1].iov_base; 719 rc = smb2_validate_and_copy_iov( 720 le16_to_cpu(qi_rsp->OutputBufferOffset), 721 le32_to_cpu(qi_rsp->OutputBufferLength), 722 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi); 723 } 724 SMB2_query_info_free(&rqst[num_rqst++]); 725 if (rc) 726 trace_smb3_query_info_compound_err(xid, tcon->tid, 727 ses->Suid, rc); 728 else 729 trace_smb3_query_info_compound_done(xid, tcon->tid, 730 ses->Suid); 731 break; 732 case SMB2_OP_POSIX_QUERY_INFO: 733 idata = in_iov[i].iov_base; 734 idata->contains_posix_file_info = true; 735 if (rc == 0 && cfile && cfile->symlink_target) { 736 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 737 if (!idata->symlink_target) 738 rc = -ENOMEM; 739 } 740 if (rc == 0) { 741 qi_rsp = (struct smb2_query_info_rsp *) 742 rsp_iov[i + 1].iov_base; 743 rc = smb2_validate_and_copy_iov( 744 le16_to_cpu(qi_rsp->OutputBufferOffset), 745 le32_to_cpu(qi_rsp->OutputBufferLength), 746 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */, 747 (char *)&idata->posix_fi); 748 } 749 if (rc == 0) 750 rc = parse_posix_sids(idata, &rsp_iov[i + 1]); 751 752 SMB2_query_info_free(&rqst[num_rqst++]); 753 if (rc) 754 trace_smb3_posix_query_info_compound_err(xid, tcon->tid, 755 ses->Suid, rc); 756 else 757 trace_smb3_posix_query_info_compound_done(xid, tcon->tid, 758 ses->Suid); 759 break; 760 case SMB2_OP_MKDIR: 761 if (rc) 762 trace_smb3_mkdir_err(xid, tcon->tid, ses->Suid, rc); 763 else 764 trace_smb3_mkdir_done(xid, tcon->tid, ses->Suid); 765 break; 766 case SMB2_OP_HARDLINK: 767 if (rc) 768 trace_smb3_hardlink_err(xid, tcon->tid, ses->Suid, rc); 769 else 770 trace_smb3_hardlink_done(xid, tcon->tid, ses->Suid); 771 SMB2_set_info_free(&rqst[num_rqst++]); 772 break; 773 case SMB2_OP_RENAME: 774 if (rc) 775 trace_smb3_rename_err(xid, tcon->tid, ses->Suid, rc); 776 else 777 trace_smb3_rename_done(xid, tcon->tid, ses->Suid); 778 SMB2_set_info_free(&rqst[num_rqst++]); 779 break; 780 case SMB2_OP_UNLINK: 781 if (!rc) 782 trace_smb3_unlink_done(xid, tcon->tid, ses->Suid); 783 else 784 trace_smb3_unlink_err(xid, tcon->tid, ses->Suid, rc); 785 SMB2_set_info_free(&rqst[num_rqst++]); 786 break; 787 case SMB2_OP_SET_EOF: 788 if (rc) 789 trace_smb3_set_eof_err(xid, tcon->tid, ses->Suid, rc); 790 else 791 trace_smb3_set_eof_done(xid, tcon->tid, ses->Suid); 792 SMB2_set_info_free(&rqst[num_rqst++]); 793 break; 794 case SMB2_OP_SET_INFO: 795 if (rc) 796 trace_smb3_set_info_compound_err(xid, tcon->tid, 797 ses->Suid, rc); 798 else 799 trace_smb3_set_info_compound_done(xid, tcon->tid, 800 ses->Suid); 801 SMB2_set_info_free(&rqst[num_rqst++]); 802 break; 803 case SMB2_OP_SET_REPARSE: 804 if (rc) { 805 trace_smb3_set_reparse_compound_err(xid, tcon->tid, 806 ses->Suid, rc); 807 } else { 808 trace_smb3_set_reparse_compound_done(xid, tcon->tid, 809 ses->Suid); 810 } 811 SMB2_ioctl_free(&rqst[num_rqst++]); 812 break; 813 case SMB2_OP_GET_REPARSE: 814 if (!rc) { 815 iov = &rsp_iov[i + 1]; 816 idata = in_iov[i].iov_base; 817 idata->reparse.io.iov = *iov; 818 idata->reparse.io.buftype = resp_buftype[i + 1]; 819 idata->contains_posix_file_info = false; /* BB VERIFY */ 820 rbuf = reparse_buf_ptr(iov); 821 if (IS_ERR(rbuf)) { 822 rc = PTR_ERR(rbuf); 823 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 824 ses->Suid, rc); 825 } else { 826 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag); 827 trace_smb3_get_reparse_compound_done(xid, tcon->tid, 828 ses->Suid); 829 } 830 memset(iov, 0, sizeof(*iov)); 831 resp_buftype[i + 1] = CIFS_NO_BUFFER; 832 } else { 833 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 834 ses->Suid, rc); 835 } 836 SMB2_ioctl_free(&rqst[num_rqst++]); 837 break; 838 case SMB2_OP_QUERY_WSL_EA: 839 if (!rc) { 840 idata = in_iov[i].iov_base; 841 idata->contains_posix_file_info = false; 842 qi_rsp = rsp_iov[i + 1].iov_base; 843 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset); 844 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength); 845 rc = check_wsl_eas(&rsp_iov[i + 1]); 846 if (!rc) { 847 memcpy(idata->wsl.eas, data[0], size[0]); 848 idata->wsl.eas_len = size[0]; 849 } 850 } 851 if (!rc) { 852 trace_smb3_query_wsl_ea_compound_done(xid, tcon->tid, 853 ses->Suid); 854 } else { 855 trace_smb3_query_wsl_ea_compound_err(xid, tcon->tid, 856 ses->Suid, rc); 857 } 858 SMB2_query_info_free(&rqst[num_rqst++]); 859 break; 860 } 861 } 862 SMB2_close_free(&rqst[num_rqst]); 863 rc = tmp_rc; 864 865 num_cmds += 2; 866 if (out_iov && out_buftype) { 867 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov)); 868 memcpy(out_buftype, resp_buftype, 869 num_cmds * sizeof(*out_buftype)); 870 } else { 871 for (i = 0; i < num_cmds; i++) 872 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base); 873 } 874 num_cmds -= 2; /* correct num_cmds as there could be a retry */ 875 kfree(vars); 876 877 if (is_replayable_error(rc) && 878 smb2_should_replay(tcon, &retries, &cur_sleep)) 879 goto replay_again; 880 881 out: 882 if (cfile) 883 cifsFileInfo_put(cfile); 884 885 return rc; 886 } 887 888 static int parse_create_response(struct cifs_open_info_data *data, 889 struct cifs_sb_info *cifs_sb, 890 const char *full_path, 891 const struct kvec *iov) 892 { 893 struct smb2_create_rsp *rsp = iov->iov_base; 894 bool reparse_point = false; 895 u32 tag = 0; 896 int rc = 0; 897 898 switch (rsp->hdr.Status) { 899 case STATUS_IO_REPARSE_TAG_NOT_HANDLED: 900 reparse_point = true; 901 break; 902 case STATUS_STOPPED_ON_SYMLINK: 903 rc = smb2_parse_symlink_response(cifs_sb, iov, 904 full_path, 905 &data->symlink_target); 906 if (rc) 907 return rc; 908 tag = IO_REPARSE_TAG_SYMLINK; 909 reparse_point = true; 910 break; 911 case STATUS_SUCCESS: 912 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT); 913 break; 914 } 915 data->reparse_point = reparse_point; 916 data->reparse.tag = tag; 917 return rc; 918 } 919 920 /* Check only if SMB2_OP_QUERY_WSL_EA command failed in the compound chain */ 921 static bool ea_unsupported(int *cmds, int num_cmds, 922 struct kvec *out_iov, int *out_buftype) 923 { 924 int i; 925 926 if (cmds[num_cmds - 1] != SMB2_OP_QUERY_WSL_EA) 927 return false; 928 929 for (i = 1; i < num_cmds - 1; i++) { 930 struct smb2_hdr *hdr = out_iov[i].iov_base; 931 932 if (out_buftype[i] == CIFS_NO_BUFFER || !hdr || 933 hdr->Status != STATUS_SUCCESS) 934 return false; 935 } 936 return true; 937 } 938 939 static inline void free_rsp_iov(struct kvec *iovs, int *buftype, int count) 940 { 941 int i; 942 943 for (i = 0; i < count; i++) { 944 free_rsp_buf(buftype[i], iovs[i].iov_base); 945 memset(&iovs[i], 0, sizeof(*iovs)); 946 buftype[i] = CIFS_NO_BUFFER; 947 } 948 } 949 950 int smb2_query_path_info(const unsigned int xid, 951 struct cifs_tcon *tcon, 952 struct cifs_sb_info *cifs_sb, 953 const char *full_path, 954 struct cifs_open_info_data *data) 955 { 956 struct kvec in_iov[3], out_iov[5] = {}; 957 struct cached_fid *cfid = NULL; 958 struct cifs_open_parms oparms; 959 struct cifsFileInfo *cfile; 960 __u32 create_options = 0; 961 int out_buftype[5] = {}; 962 struct smb2_hdr *hdr; 963 int num_cmds = 0; 964 int cmds[3]; 965 bool islink; 966 int rc, rc2; 967 968 data->adjust_tz = false; 969 data->reparse_point = false; 970 971 /* 972 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX. 973 * Create SMB2_query_posix_info worker function to do non-compounded 974 * query when we already have an open file handle for this. For now this 975 * is fast enough (always using the compounded version). 976 */ 977 if (!tcon->posix_extensions) { 978 if (*full_path) { 979 rc = -ENOENT; 980 } else { 981 rc = open_cached_dir(xid, tcon, full_path, 982 cifs_sb, false, &cfid); 983 } 984 /* If it is a root and its handle is cached then use it */ 985 if (!rc) { 986 if (cfid->file_all_info_is_valid) { 987 memcpy(&data->fi, &cfid->file_all_info, 988 sizeof(data->fi)); 989 } else { 990 rc = SMB2_query_info(xid, tcon, 991 cfid->fid.persistent_fid, 992 cfid->fid.volatile_fid, 993 &data->fi); 994 } 995 close_cached_dir(cfid); 996 return rc; 997 } 998 cmds[num_cmds++] = SMB2_OP_QUERY_INFO; 999 } else { 1000 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO; 1001 } 1002 1003 in_iov[0].iov_base = data; 1004 in_iov[0].iov_len = sizeof(*data); 1005 in_iov[1] = in_iov[0]; 1006 in_iov[2] = in_iov[0]; 1007 1008 cifs_get_readable_path(tcon, full_path, &cfile); 1009 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES, 1010 FILE_OPEN, create_options, ACL_NO_MODE); 1011 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1012 &oparms, in_iov, cmds, num_cmds, 1013 cfile, out_iov, out_buftype, NULL); 1014 hdr = out_iov[0].iov_base; 1015 /* 1016 * If first iov is unset, then SMB session was dropped or we've got a 1017 * cached open file (@cfile). 1018 */ 1019 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1020 goto out; 1021 1022 switch (rc) { 1023 case 0: 1024 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1025 break; 1026 case -EACCES: 1027 /* 1028 * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with 1029 * STATUS_ACCESS_DENIED then it means that caller does not have permission to 1030 * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue 1031 * SMB2_OP_QUERY_INFO command. 1032 * 1033 * There is an alternative way how to query limited information about path but still 1034 * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful 1035 * response subset of query information. 1036 * 1037 * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED 1038 * access which will grant the maximum possible access to the file and the response 1039 * will contain required query information for stat() syscall. 1040 */ 1041 1042 if (tcon->posix_extensions) 1043 break; 1044 1045 num_cmds = 1; 1046 cmds[0] = SMB2_OP_OPEN_QUERY; 1047 in_iov[0].iov_base = data; 1048 in_iov[0].iov_len = sizeof(*data); 1049 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED, 1050 FILE_OPEN, create_options, ACL_NO_MODE); 1051 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1052 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1053 &oparms, in_iov, cmds, num_cmds, 1054 cfile, out_iov, out_buftype, NULL); 1055 1056 hdr = out_iov[0].iov_base; 1057 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1058 goto out; 1059 1060 if (!rc) 1061 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1062 break; 1063 case -EOPNOTSUPP: 1064 /* 1065 * BB TODO: When support for special files added to Samba 1066 * re-verify this path. 1067 */ 1068 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1069 if (rc || !data->reparse_point) 1070 goto out; 1071 1072 /* 1073 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create 1074 * response. 1075 */ 1076 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK) { 1077 cmds[num_cmds++] = SMB2_OP_GET_REPARSE; 1078 if (!tcon->posix_extensions) 1079 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA; 1080 } 1081 1082 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1083 FILE_READ_ATTRIBUTES | 1084 FILE_READ_EA | SYNCHRONIZE, 1085 FILE_OPEN, create_options | 1086 OPEN_REPARSE_POINT, ACL_NO_MODE); 1087 cifs_get_readable_path(tcon, full_path, &cfile); 1088 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1089 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1090 &oparms, in_iov, cmds, num_cmds, 1091 cfile, out_iov, out_buftype, NULL); 1092 if (rc && ea_unsupported(cmds, num_cmds, 1093 out_iov, out_buftype)) { 1094 if (data->reparse.tag != IO_REPARSE_TAG_LX_BLK && 1095 data->reparse.tag != IO_REPARSE_TAG_LX_CHR) 1096 rc = 0; 1097 else 1098 rc = -EOPNOTSUPP; 1099 } 1100 1101 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) { 1102 bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY; 1103 rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb); 1104 } 1105 break; 1106 case -EREMOTE: 1107 break; 1108 default: 1109 if (hdr->Status != STATUS_OBJECT_NAME_INVALID) 1110 break; 1111 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 1112 full_path, &islink); 1113 if (rc2) { 1114 rc = rc2; 1115 goto out; 1116 } 1117 if (islink) 1118 rc = -EREMOTE; 1119 } 1120 1121 out: 1122 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1123 return rc; 1124 } 1125 1126 int 1127 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, 1128 struct cifs_tcon *tcon, const char *name, 1129 struct cifs_sb_info *cifs_sb) 1130 { 1131 struct cifs_open_parms oparms; 1132 1133 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1134 FILE_CREATE, CREATE_NOT_FILE, mode); 1135 return smb2_compound_op(xid, tcon, cifs_sb, 1136 name, &oparms, NULL, 1137 &(int){SMB2_OP_MKDIR}, 1, 1138 NULL, NULL, NULL, NULL); 1139 } 1140 1141 void 1142 smb2_mkdir_setinfo(struct inode *inode, const char *name, 1143 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 1144 const unsigned int xid) 1145 { 1146 struct cifs_open_parms oparms; 1147 FILE_BASIC_INFO data = {}; 1148 struct cifsInodeInfo *cifs_i; 1149 struct cifsFileInfo *cfile; 1150 struct kvec in_iov; 1151 u32 dosattrs; 1152 int tmprc; 1153 1154 in_iov.iov_base = &data; 1155 in_iov.iov_len = sizeof(data); 1156 cifs_i = CIFS_I(inode); 1157 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 1158 data.Attributes = cpu_to_le32(dosattrs); 1159 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); 1160 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1161 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE); 1162 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, 1163 &oparms, &in_iov, 1164 &(int){SMB2_OP_SET_INFO}, 1, 1165 cfile, NULL, NULL, NULL); 1166 if (tmprc == 0) 1167 cifs_i->cifsAttrs = dosattrs; 1168 } 1169 1170 int 1171 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1172 struct cifs_sb_info *cifs_sb) 1173 { 1174 struct cifs_open_parms oparms; 1175 1176 drop_cached_dir_by_name(xid, tcon, name, cifs_sb); 1177 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE, 1178 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE); 1179 return smb2_compound_op(xid, tcon, cifs_sb, 1180 name, &oparms, NULL, 1181 &(int){SMB2_OP_UNLINK}, 1, 1182 NULL, NULL, NULL, NULL); 1183 } 1184 1185 int 1186 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1187 struct cifs_sb_info *cifs_sb, struct dentry *dentry) 1188 { 1189 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 1190 __le16 *utf16_path __free(kfree) = NULL; 1191 int retries = 0, cur_sleep = 0; 1192 struct TCP_Server_Info *server; 1193 struct cifs_open_parms oparms; 1194 struct smb2_create_req *creq; 1195 struct inode *inode = NULL; 1196 struct smb_rqst rqst[2]; 1197 struct kvec rsp_iov[2]; 1198 struct kvec close_iov; 1199 int resp_buftype[2]; 1200 struct cifs_fid fid; 1201 int flags = 0; 1202 __u8 oplock; 1203 int rc; 1204 1205 utf16_path = cifs_convert_path_to_utf16(name, cifs_sb); 1206 if (!utf16_path) 1207 return -ENOMEM; 1208 1209 if (smb3_encryption_required(tcon)) 1210 flags |= CIFS_TRANSFORM_REQ; 1211 again: 1212 oplock = SMB2_OPLOCK_LEVEL_NONE; 1213 server = cifs_pick_channel(tcon->ses); 1214 1215 memset(rqst, 0, sizeof(rqst)); 1216 memset(resp_buftype, 0, sizeof(resp_buftype)); 1217 memset(rsp_iov, 0, sizeof(rsp_iov)); 1218 1219 rqst[0].rq_iov = open_iov; 1220 rqst[0].rq_nvec = ARRAY_SIZE(open_iov); 1221 1222 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE | FILE_READ_ATTRIBUTES, 1223 FILE_OPEN, CREATE_DELETE_ON_CLOSE | 1224 OPEN_REPARSE_POINT, ACL_NO_MODE); 1225 oparms.fid = &fid; 1226 1227 if (dentry) { 1228 inode = d_inode(dentry); 1229 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) { 1230 oplock = SMB2_OPLOCK_LEVEL_LEASE; 1231 server->ops->get_lease_key(inode, &fid); 1232 } 1233 } 1234 1235 rc = SMB2_open_init(tcon, server, 1236 &rqst[0], &oplock, &oparms, utf16_path); 1237 if (rc) 1238 goto err_free; 1239 smb2_set_next_command(tcon, &rqst[0]); 1240 creq = rqst[0].rq_iov[0].iov_base; 1241 creq->ShareAccess = FILE_SHARE_DELETE_LE; 1242 1243 rqst[1].rq_iov = &close_iov; 1244 rqst[1].rq_nvec = 1; 1245 1246 rc = SMB2_close_init(tcon, server, &rqst[1], 1247 COMPOUND_FID, COMPOUND_FID, false); 1248 smb2_set_related(&rqst[1]); 1249 if (rc) 1250 goto err_free; 1251 1252 if (retries) { 1253 /* Back-off before retry */ 1254 if (cur_sleep) 1255 msleep(cur_sleep); 1256 for (int i = 0; i < ARRAY_SIZE(rqst); i++) 1257 smb2_set_replay(server, &rqst[i]); 1258 } 1259 1260 rc = compound_send_recv(xid, tcon->ses, server, flags, 1261 ARRAY_SIZE(rqst), rqst, 1262 resp_buftype, rsp_iov); 1263 SMB2_open_free(&rqst[0]); 1264 SMB2_close_free(&rqst[1]); 1265 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1266 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1267 1268 if (is_replayable_error(rc) && 1269 smb2_should_replay(tcon, &retries, &cur_sleep)) 1270 goto again; 1271 1272 /* Retry compound request without lease */ 1273 if (rc == -EINVAL && dentry) { 1274 dentry = NULL; 1275 retries = 0; 1276 cur_sleep = 0; 1277 goto again; 1278 } 1279 /* 1280 * If dentry (hence, inode) is NULL, lease break is going to 1281 * take care of degrading leases on handles for deleted files. 1282 */ 1283 if (!rc && inode) 1284 cifs_mark_open_handles_for_deleted_file(inode, name); 1285 1286 return rc; 1287 1288 err_free: 1289 SMB2_open_free(&rqst[0]); 1290 SMB2_close_free(&rqst[1]); 1291 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1292 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1293 return rc; 1294 } 1295 1296 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 1297 const char *from_name, const char *to_name, 1298 struct cifs_sb_info *cifs_sb, 1299 __u32 create_options, __u32 access, 1300 int command, struct cifsFileInfo *cfile, 1301 struct dentry *dentry) 1302 { 1303 struct cifs_open_parms oparms; 1304 struct kvec in_iov; 1305 __le16 *smb2_to_name = NULL; 1306 int rc; 1307 1308 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 1309 if (smb2_to_name == NULL) { 1310 rc = -ENOMEM; 1311 if (cfile) 1312 cifsFileInfo_put(cfile); 1313 goto smb2_rename_path; 1314 } 1315 in_iov.iov_base = smb2_to_name; 1316 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX); 1317 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN, 1318 create_options, ACL_NO_MODE); 1319 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, 1320 &oparms, &in_iov, &command, 1, 1321 cfile, NULL, NULL, dentry); 1322 smb2_rename_path: 1323 kfree(smb2_to_name); 1324 return rc; 1325 } 1326 1327 int smb2_rename_path(const unsigned int xid, 1328 struct cifs_tcon *tcon, 1329 struct dentry *source_dentry, 1330 const char *from_name, const char *to_name, 1331 struct cifs_sb_info *cifs_sb) 1332 { 1333 struct cifsFileInfo *cfile; 1334 __u32 co = file_create_options(source_dentry); 1335 1336 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb); 1337 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); 1338 1339 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1340 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry); 1341 if (rc == -EINVAL) { 1342 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1343 cifs_get_writable_path(tcon, from_name, 1344 FIND_WR_WITH_DELETE, &cfile); 1345 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1346 co, DELETE, SMB2_OP_RENAME, cfile, NULL); 1347 } 1348 return rc; 1349 } 1350 1351 int smb2_create_hardlink(const unsigned int xid, 1352 struct cifs_tcon *tcon, 1353 struct dentry *source_dentry, 1354 const char *from_name, const char *to_name, 1355 struct cifs_sb_info *cifs_sb) 1356 { 1357 __u32 co = file_create_options(source_dentry); 1358 1359 return smb2_set_path_attr(xid, tcon, from_name, to_name, 1360 cifs_sb, co, FILE_READ_ATTRIBUTES, 1361 SMB2_OP_HARDLINK, NULL, NULL); 1362 } 1363 1364 int 1365 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 1366 const char *full_path, __u64 size, 1367 struct cifs_sb_info *cifs_sb, bool set_alloc, 1368 struct dentry *dentry) 1369 { 1370 struct cifs_open_parms oparms; 1371 struct cifsFileInfo *cfile; 1372 struct kvec in_iov; 1373 __le64 eof = cpu_to_le64(size); 1374 int rc; 1375 1376 in_iov.iov_base = &eof; 1377 in_iov.iov_len = sizeof(eof); 1378 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1379 1380 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA, 1381 FILE_OPEN, 0, ACL_NO_MODE); 1382 rc = smb2_compound_op(xid, tcon, cifs_sb, 1383 full_path, &oparms, &in_iov, 1384 &(int){SMB2_OP_SET_EOF}, 1, 1385 cfile, NULL, NULL, dentry); 1386 if (rc == -EINVAL) { 1387 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1388 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1389 rc = smb2_compound_op(xid, tcon, cifs_sb, 1390 full_path, &oparms, &in_iov, 1391 &(int){SMB2_OP_SET_EOF}, 1, 1392 cfile, NULL, NULL, NULL); 1393 } 1394 return rc; 1395 } 1396 1397 int 1398 smb2_set_file_info(struct inode *inode, const char *full_path, 1399 FILE_BASIC_INFO *buf, const unsigned int xid) 1400 { 1401 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), }; 1402 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 1403 struct cifsFileInfo *cfile = NULL; 1404 struct cifs_open_parms oparms; 1405 struct tcon_link *tlink; 1406 struct cifs_tcon *tcon; 1407 int rc = 0; 1408 1409 tlink = cifs_sb_tlink(cifs_sb); 1410 if (IS_ERR(tlink)) 1411 return PTR_ERR(tlink); 1412 tcon = tlink_tcon(tlink); 1413 1414 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && 1415 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0)) { 1416 if (buf->Attributes == 0) 1417 goto out; /* would be a no op, no sense sending this */ 1418 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1419 } 1420 1421 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES, 1422 FILE_OPEN, 0, ACL_NO_MODE); 1423 rc = smb2_compound_op(xid, tcon, cifs_sb, 1424 full_path, &oparms, &in_iov, 1425 &(int){SMB2_OP_SET_INFO}, 1, 1426 cfile, NULL, NULL, NULL); 1427 out: 1428 cifs_put_tlink(tlink); 1429 return rc; 1430 } 1431 1432 struct inode *smb2_create_reparse_inode(struct cifs_open_info_data *data, 1433 struct super_block *sb, 1434 const unsigned int xid, 1435 struct cifs_tcon *tcon, 1436 const char *full_path, 1437 bool directory, 1438 struct kvec *reparse_iov, 1439 struct kvec *xattr_iov) 1440 { 1441 struct cifs_open_parms oparms; 1442 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 1443 struct cifsFileInfo *cfile; 1444 struct inode *new = NULL; 1445 int out_buftype[4] = {}; 1446 struct kvec out_iov[4] = {}; 1447 struct kvec in_iov[2]; 1448 int cmds[2]; 1449 int rc; 1450 int i; 1451 1452 /* 1453 * If server filesystem does not support reparse points then do not 1454 * attempt to create reparse point. This will prevent creating unusable 1455 * empty object on the server. 1456 */ 1457 if (!CIFS_REPARSE_SUPPORT(tcon)) 1458 return ERR_PTR(-EOPNOTSUPP); 1459 1460 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1461 SYNCHRONIZE | DELETE | 1462 FILE_READ_ATTRIBUTES | 1463 FILE_WRITE_ATTRIBUTES, 1464 FILE_CREATE, 1465 (directory ? CREATE_NOT_FILE : CREATE_NOT_DIR) | OPEN_REPARSE_POINT, 1466 ACL_NO_MODE); 1467 if (xattr_iov) 1468 oparms.ea_cctx = xattr_iov; 1469 1470 cmds[0] = SMB2_OP_SET_REPARSE; 1471 in_iov[0] = *reparse_iov; 1472 in_iov[1].iov_base = data; 1473 in_iov[1].iov_len = sizeof(*data); 1474 1475 if (tcon->posix_extensions) { 1476 cmds[1] = SMB2_OP_POSIX_QUERY_INFO; 1477 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1478 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, 1479 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL); 1480 if (!rc) { 1481 rc = smb311_posix_get_inode_info(&new, full_path, 1482 data, sb, xid); 1483 } 1484 } else { 1485 cmds[1] = SMB2_OP_QUERY_INFO; 1486 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1487 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, 1488 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL); 1489 if (!rc) { 1490 rc = cifs_get_inode_info(&new, full_path, 1491 data, sb, xid, NULL); 1492 } 1493 } 1494 1495 1496 /* 1497 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then 1498 * remove the intermediate object created by CREATE. Otherwise 1499 * empty object stay on the server when reparse call failed. 1500 */ 1501 if (rc && 1502 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER && 1503 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS && 1504 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER || 1505 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS)) 1506 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL); 1507 1508 for (i = 0; i < ARRAY_SIZE(out_buftype); i++) 1509 free_rsp_buf(out_buftype[i], out_iov[i].iov_base); 1510 1511 return rc ? ERR_PTR(rc) : new; 1512 } 1513 1514 int smb2_query_reparse_point(const unsigned int xid, 1515 struct cifs_tcon *tcon, 1516 struct cifs_sb_info *cifs_sb, 1517 const char *full_path, 1518 u32 *tag, struct kvec *rsp, 1519 int *rsp_buftype) 1520 { 1521 struct cifs_open_parms oparms; 1522 struct cifs_open_info_data data = {}; 1523 struct cifsFileInfo *cfile; 1524 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), }; 1525 int rc; 1526 1527 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 1528 1529 cifs_get_readable_path(tcon, full_path, &cfile); 1530 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1531 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE, 1532 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE); 1533 rc = smb2_compound_op(xid, tcon, cifs_sb, 1534 full_path, &oparms, &in_iov, 1535 &(int){SMB2_OP_GET_REPARSE}, 1, 1536 cfile, NULL, NULL, NULL); 1537 if (rc) 1538 goto out; 1539 1540 *tag = data.reparse.tag; 1541 *rsp = data.reparse.io.iov; 1542 *rsp_buftype = data.reparse.io.buftype; 1543 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov)); 1544 data.reparse.io.buftype = CIFS_NO_BUFFER; 1545 out: 1546 cifs_free_open_info(&data); 1547 return rc; 1548 } 1549 1550 static inline __le16 *utf16_smb2_path(struct cifs_sb_info *cifs_sb, 1551 const char *name, size_t namelen) 1552 { 1553 int len; 1554 1555 if (*name == '\\' || 1556 (cifs_sb_master_tlink(cifs_sb) && 1557 cifs_sb_master_tcon(cifs_sb)->posix_extensions && *name == '/')) 1558 name++; 1559 return cifs_strndup_to_utf16(name, namelen, &len, 1560 cifs_sb->local_nls, 1561 cifs_remap(cifs_sb)); 1562 } 1563 1564 int smb2_rename_pending_delete(const char *full_path, 1565 struct dentry *dentry, 1566 const unsigned int xid) 1567 { 1568 struct cifs_sb_info *cifs_sb = CIFS_SB(d_inode(dentry)->i_sb); 1569 struct cifsInodeInfo *cinode = CIFS_I(d_inode(dentry)); 1570 __le16 *utf16_path __free(kfree) = NULL; 1571 __u32 co = file_create_options(dentry); 1572 int cmds[] = { 1573 SMB2_OP_SET_INFO, 1574 SMB2_OP_RENAME, 1575 SMB2_OP_UNLINK, 1576 }; 1577 const int num_cmds = ARRAY_SIZE(cmds); 1578 char *to_name __free(kfree) = NULL; 1579 __u32 attrs = cinode->cifsAttrs; 1580 struct cifs_open_parms oparms; 1581 static atomic_t sillycounter; 1582 struct cifsFileInfo *cfile; 1583 struct tcon_link *tlink; 1584 struct cifs_tcon *tcon; 1585 struct kvec iov[2]; 1586 const char *ppath; 1587 void *page; 1588 size_t len; 1589 int rc; 1590 1591 tlink = cifs_sb_tlink(cifs_sb); 1592 if (IS_ERR(tlink)) 1593 return PTR_ERR(tlink); 1594 tcon = tlink_tcon(tlink); 1595 1596 page = alloc_dentry_path(); 1597 1598 ppath = build_path_from_dentry(dentry->d_parent, page); 1599 if (IS_ERR(ppath)) { 1600 rc = PTR_ERR(ppath); 1601 goto out; 1602 } 1603 1604 len = strlen(ppath) + strlen("/.__smb1234") + 1; 1605 to_name = kmalloc(len, GFP_KERNEL); 1606 if (!to_name) { 1607 rc = -ENOMEM; 1608 goto out; 1609 } 1610 1611 scnprintf(to_name, len, "%s%c.__smb%04X", ppath, CIFS_DIR_SEP(cifs_sb), 1612 atomic_inc_return(&sillycounter) & 0xffff); 1613 1614 utf16_path = utf16_smb2_path(cifs_sb, to_name, len); 1615 if (!utf16_path) { 1616 rc = -ENOMEM; 1617 goto out; 1618 } 1619 1620 drop_cached_dir_by_name(xid, tcon, full_path, cifs_sb); 1621 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1622 DELETE | FILE_WRITE_ATTRIBUTES, 1623 FILE_OPEN, co, ACL_NO_MODE); 1624 1625 attrs &= ~ATTR_READONLY; 1626 if (!attrs) 1627 attrs = ATTR_NORMAL; 1628 if (d_inode(dentry)->i_nlink <= 1) 1629 attrs |= ATTR_HIDDEN; 1630 iov[0].iov_base = &(FILE_BASIC_INFO) { 1631 .Attributes = cpu_to_le32(attrs), 1632 }; 1633 iov[0].iov_len = sizeof(FILE_BASIC_INFO); 1634 iov[1].iov_base = utf16_path; 1635 iov[1].iov_len = sizeof(*utf16_path) * UniStrlen((wchar_t *)utf16_path); 1636 1637 cifs_get_writable_path(tcon, full_path, FIND_WR_WITH_DELETE, &cfile); 1638 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, iov, 1639 cmds, num_cmds, cfile, NULL, NULL, dentry); 1640 if (rc == -EINVAL) { 1641 cifs_dbg(FYI, "invalid lease key, resending request without lease\n"); 1642 cifs_get_writable_path(tcon, full_path, 1643 FIND_WR_WITH_DELETE, &cfile); 1644 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, iov, 1645 cmds, num_cmds, cfile, NULL, NULL, NULL); 1646 } 1647 if (!rc) { 1648 set_bit(CIFS_INO_DELETE_PENDING, &cinode->flags); 1649 } else { 1650 cifs_tcon_dbg(FYI, "%s: failed to rename '%s' to '%s': %d\n", 1651 __func__, full_path, to_name, rc); 1652 rc = smb_EIO1(smb_eio_trace_pend_del_fail, rc); 1653 } 1654 out: 1655 cifs_put_tlink(tlink); 1656 free_dentry_path(page); 1657 return rc; 1658 } 1659