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smb2inode.c
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linux-6.19.14/fs/smb/client/smb2inode.c
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 "cifspdu.h" 17#include "cifsglob.h" 18#include "cifsproto.h" 19#include "cifs_debug.h" 20#include "cifs_fs_sb.h" 21#include "cifs_unicode.h" 22#include "fscache.h" 23#include "smb2glob.h" 24#include "smb2proto.h" 25#include "cached_dir.h" 26#include "../common/smb2status.h" 27 28static 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 50static 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 */ 63static 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 91struct 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 99static 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 106static 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->ea_data + 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 */ 175static 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 = 1; 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 205replay_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 for (i = 1; i < num_rqst - 2; i++) 643 smb2_set_replay(server, &rqst[i]); 644 645 rc = compound_send_recv(xid, ses, server, 646 flags, num_rqst - 2, 647 &rqst[1], &resp_buftype[1], 648 &rsp_iov[1]); 649 } else { 650 if (retries) 651 for (i = 0; i < num_rqst; i++) 652 smb2_set_replay(server, &rqst[i]); 653 654 rc = compound_send_recv(xid, ses, server, 655 flags, num_rqst, 656 rqst, resp_buftype, 657 rsp_iov); 658 } 659 660finished: 661 num_rqst = 0; 662 SMB2_open_free(&rqst[num_rqst++]); 663 if (rc == -EREMCHG) { 664 pr_warn_once("server share %s deleted\n", tcon->tree_name); 665 tcon->need_reconnect = true; 666 } 667 668 tmp_rc = rc; 669 670 if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) { 671 create_rsp = rsp_iov[0].iov_base; 672 idata = in_iov[0].iov_base; 673 idata->fi.CreationTime = create_rsp->CreationTime; 674 idata->fi.LastAccessTime = create_rsp->LastAccessTime; 675 idata->fi.LastWriteTime = create_rsp->LastWriteTime; 676 idata->fi.ChangeTime = create_rsp->ChangeTime; 677 idata->fi.Attributes = create_rsp->FileAttributes; 678 idata->fi.AllocationSize = create_rsp->AllocationSize; 679 idata->fi.EndOfFile = create_rsp->EndofFile; 680 if (le32_to_cpu(idata->fi.NumberOfLinks) == 0) 681 idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */ 682 idata->fi.DeletePending = 0; /* successful open = not delete pending */ 683 idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY); 684 685 /* smb2_parse_contexts() fills idata->fi.IndexNumber */ 686 rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch, 687 oparms->fid->lease_key, &oplock, &idata->fi, NULL); 688 if (rc) 689 cifs_dbg(VFS, "rc: %d parsing context of compound op\n", rc); 690 } 691 692 for (i = 0; i < num_cmds; i++) { 693 char *buf = rsp_iov[i + 1].iov_base; 694 695 if (buf && resp_buftype[i + 1] != CIFS_NO_BUFFER) 696 rc = server->ops->map_error(buf, false); 697 else 698 rc = tmp_rc; 699 switch (cmds[i]) { 700 case SMB2_OP_QUERY_INFO: 701 idata = in_iov[i].iov_base; 702 idata->contains_posix_file_info = false; 703 if (rc == 0 && cfile && cfile->symlink_target) { 704 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 705 if (!idata->symlink_target) 706 rc = -ENOMEM; 707 } 708 if (rc == 0) { 709 qi_rsp = (struct smb2_query_info_rsp *) 710 rsp_iov[i + 1].iov_base; 711 rc = smb2_validate_and_copy_iov( 712 le16_to_cpu(qi_rsp->OutputBufferOffset), 713 le32_to_cpu(qi_rsp->OutputBufferLength), 714 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi); 715 } 716 SMB2_query_info_free(&rqst[num_rqst++]); 717 if (rc) 718 trace_smb3_query_info_compound_err(xid, tcon->tid, 719 ses->Suid, rc); 720 else 721 trace_smb3_query_info_compound_done(xid, tcon->tid, 722 ses->Suid); 723 break; 724 case SMB2_OP_POSIX_QUERY_INFO: 725 idata = in_iov[i].iov_base; 726 idata->contains_posix_file_info = true; 727 if (rc == 0 && cfile && cfile->symlink_target) { 728 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 729 if (!idata->symlink_target) 730 rc = -ENOMEM; 731 } 732 if (rc == 0) { 733 qi_rsp = (struct smb2_query_info_rsp *) 734 rsp_iov[i + 1].iov_base; 735 rc = smb2_validate_and_copy_iov( 736 le16_to_cpu(qi_rsp->OutputBufferOffset), 737 le32_to_cpu(qi_rsp->OutputBufferLength), 738 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */, 739 (char *)&idata->posix_fi); 740 } 741 if (rc == 0) 742 rc = parse_posix_sids(idata, &rsp_iov[i + 1]); 743 744 SMB2_query_info_free(&rqst[num_rqst++]); 745 if (rc) 746 trace_smb3_posix_query_info_compound_err(xid, tcon->tid, 747 ses->Suid, rc); 748 else 749 trace_smb3_posix_query_info_compound_done(xid, tcon->tid, 750 ses->Suid); 751 break; 752 case SMB2_OP_MKDIR: 753 if (rc) 754 trace_smb3_mkdir_err(xid, tcon->tid, ses->Suid, rc); 755 else 756 trace_smb3_mkdir_done(xid, tcon->tid, ses->Suid); 757 break; 758 case SMB2_OP_HARDLINK: 759 if (rc) 760 trace_smb3_hardlink_err(xid, tcon->tid, ses->Suid, rc); 761 else 762 trace_smb3_hardlink_done(xid, tcon->tid, ses->Suid); 763 SMB2_set_info_free(&rqst[num_rqst++]); 764 break; 765 case SMB2_OP_RENAME: 766 if (rc) 767 trace_smb3_rename_err(xid, tcon->tid, ses->Suid, rc); 768 else 769 trace_smb3_rename_done(xid, tcon->tid, ses->Suid); 770 SMB2_set_info_free(&rqst[num_rqst++]); 771 break; 772 case SMB2_OP_UNLINK: 773 if (!rc) 774 trace_smb3_unlink_done(xid, tcon->tid, ses->Suid); 775 else 776 trace_smb3_unlink_err(xid, tcon->tid, ses->Suid, rc); 777 SMB2_set_info_free(&rqst[num_rqst++]); 778 break; 779 case SMB2_OP_SET_EOF: 780 if (rc) 781 trace_smb3_set_eof_err(xid, tcon->tid, ses->Suid, rc); 782 else 783 trace_smb3_set_eof_done(xid, tcon->tid, ses->Suid); 784 SMB2_set_info_free(&rqst[num_rqst++]); 785 break; 786 case SMB2_OP_SET_INFO: 787 if (rc) 788 trace_smb3_set_info_compound_err(xid, tcon->tid, 789 ses->Suid, rc); 790 else 791 trace_smb3_set_info_compound_done(xid, tcon->tid, 792 ses->Suid); 793 SMB2_set_info_free(&rqst[num_rqst++]); 794 break; 795 case SMB2_OP_SET_REPARSE: 796 if (rc) { 797 trace_smb3_set_reparse_compound_err(xid, tcon->tid, 798 ses->Suid, rc); 799 } else { 800 trace_smb3_set_reparse_compound_done(xid, tcon->tid, 801 ses->Suid); 802 } 803 SMB2_ioctl_free(&rqst[num_rqst++]); 804 break; 805 case SMB2_OP_GET_REPARSE: 806 if (!rc) { 807 iov = &rsp_iov[i + 1]; 808 idata = in_iov[i].iov_base; 809 idata->reparse.io.iov = *iov; 810 idata->reparse.io.buftype = resp_buftype[i + 1]; 811 idata->contains_posix_file_info = false; /* BB VERIFY */ 812 rbuf = reparse_buf_ptr(iov); 813 if (IS_ERR(rbuf)) { 814 rc = PTR_ERR(rbuf); 815 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 816 ses->Suid, rc); 817 } else { 818 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag); 819 trace_smb3_get_reparse_compound_done(xid, tcon->tid, 820 ses->Suid); 821 } 822 memset(iov, 0, sizeof(*iov)); 823 resp_buftype[i + 1] = CIFS_NO_BUFFER; 824 } else { 825 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 826 ses->Suid, rc); 827 } 828 SMB2_ioctl_free(&rqst[num_rqst++]); 829 break; 830 case SMB2_OP_QUERY_WSL_EA: 831 if (!rc) { 832 idata = in_iov[i].iov_base; 833 idata->contains_posix_file_info = false; 834 qi_rsp = rsp_iov[i + 1].iov_base; 835 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset); 836 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength); 837 rc = check_wsl_eas(&rsp_iov[i + 1]); 838 if (!rc) { 839 memcpy(idata->wsl.eas, data[0], size[0]); 840 idata->wsl.eas_len = size[0]; 841 } 842 } 843 if (!rc) { 844 trace_smb3_query_wsl_ea_compound_done(xid, tcon->tid, 845 ses->Suid); 846 } else { 847 trace_smb3_query_wsl_ea_compound_err(xid, tcon->tid, 848 ses->Suid, rc); 849 } 850 SMB2_query_info_free(&rqst[num_rqst++]); 851 break; 852 } 853 } 854 SMB2_close_free(&rqst[num_rqst]); 855 rc = tmp_rc; 856 857 num_cmds += 2; 858 if (out_iov && out_buftype) { 859 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov)); 860 memcpy(out_buftype, resp_buftype, 861 num_cmds * sizeof(*out_buftype)); 862 } else { 863 for (i = 0; i < num_cmds; i++) 864 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base); 865 } 866 num_cmds -= 2; /* correct num_cmds as there could be a retry */ 867 kfree(vars); 868 869 if (is_replayable_error(rc) && 870 smb2_should_replay(tcon, &retries, &cur_sleep)) 871 goto replay_again; 872 873out: 874 if (cfile) 875 cifsFileInfo_put(cfile); 876 877 return rc; 878} 879 880static int parse_create_response(struct cifs_open_info_data *data, 881 struct cifs_sb_info *cifs_sb, 882 const char *full_path, 883 const struct kvec *iov) 884{ 885 struct smb2_create_rsp *rsp = iov->iov_base; 886 bool reparse_point = false; 887 u32 tag = 0; 888 int rc = 0; 889 890 switch (rsp->hdr.Status) { 891 case STATUS_IO_REPARSE_TAG_NOT_HANDLED: 892 reparse_point = true; 893 break; 894 case STATUS_STOPPED_ON_SYMLINK: 895 rc = smb2_parse_symlink_response(cifs_sb, iov, 896 full_path, 897 &data->symlink_target); 898 if (rc) 899 return rc; 900 tag = IO_REPARSE_TAG_SYMLINK; 901 reparse_point = true; 902 break; 903 case STATUS_SUCCESS: 904 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT); 905 break; 906 } 907 data->reparse_point = reparse_point; 908 data->reparse.tag = tag; 909 return rc; 910} 911 912/* Check only if SMB2_OP_QUERY_WSL_EA command failed in the compound chain */ 913static bool ea_unsupported(int *cmds, int num_cmds, 914 struct kvec *out_iov, int *out_buftype) 915{ 916 int i; 917 918 if (cmds[num_cmds - 1] != SMB2_OP_QUERY_WSL_EA) 919 return false; 920 921 for (i = 1; i < num_cmds - 1; i++) { 922 struct smb2_hdr *hdr = out_iov[i].iov_base; 923 924 if (out_buftype[i] == CIFS_NO_BUFFER || !hdr || 925 hdr->Status != STATUS_SUCCESS) 926 return false; 927 } 928 return true; 929} 930 931static inline void free_rsp_iov(struct kvec *iovs, int *buftype, int count) 932{ 933 int i; 934 935 for (i = 0; i < count; i++) { 936 free_rsp_buf(buftype[i], iovs[i].iov_base); 937 memset(&iovs[i], 0, sizeof(*iovs)); 938 buftype[i] = CIFS_NO_BUFFER; 939 } 940} 941 942int smb2_query_path_info(const unsigned int xid, 943 struct cifs_tcon *tcon, 944 struct cifs_sb_info *cifs_sb, 945 const char *full_path, 946 struct cifs_open_info_data *data) 947{ 948 struct kvec in_iov[3], out_iov[5] = {}; 949 struct cached_fid *cfid = NULL; 950 struct cifs_open_parms oparms; 951 struct cifsFileInfo *cfile; 952 __u32 create_options = 0; 953 int out_buftype[5] = {}; 954 struct smb2_hdr *hdr; 955 int num_cmds = 0; 956 int cmds[3]; 957 bool islink; 958 int rc, rc2; 959 960 data->adjust_tz = false; 961 data->reparse_point = false; 962 963 /* 964 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX. 965 * Create SMB2_query_posix_info worker function to do non-compounded 966 * query when we already have an open file handle for this. For now this 967 * is fast enough (always using the compounded version). 968 */ 969 if (!tcon->posix_extensions) { 970 if (*full_path) { 971 rc = -ENOENT; 972 } else { 973 rc = open_cached_dir(xid, tcon, full_path, 974 cifs_sb, false, &cfid); 975 } 976 /* If it is a root and its handle is cached then use it */ 977 if (!rc) { 978 if (cfid->file_all_info_is_valid) { 979 memcpy(&data->fi, &cfid->file_all_info, 980 sizeof(data->fi)); 981 } else { 982 rc = SMB2_query_info(xid, tcon, 983 cfid->fid.persistent_fid, 984 cfid->fid.volatile_fid, 985 &data->fi); 986 } 987 close_cached_dir(cfid); 988 return rc; 989 } 990 cmds[num_cmds++] = SMB2_OP_QUERY_INFO; 991 } else { 992 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO; 993 } 994 995 in_iov[0].iov_base = data; 996 in_iov[0].iov_len = sizeof(*data); 997 in_iov[1] = in_iov[0]; 998 in_iov[2] = in_iov[0]; 999 1000 cifs_get_readable_path(tcon, full_path, &cfile); 1001 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES, 1002 FILE_OPEN, create_options, ACL_NO_MODE); 1003 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1004 &oparms, in_iov, cmds, num_cmds, 1005 cfile, out_iov, out_buftype, NULL); 1006 hdr = out_iov[0].iov_base; 1007 /* 1008 * If first iov is unset, then SMB session was dropped or we've got a 1009 * cached open file (@cfile). 1010 */ 1011 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1012 goto out; 1013 1014 switch (rc) { 1015 case 0: 1016 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1017 break; 1018 case -EACCES: 1019 /* 1020 * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with 1021 * STATUS_ACCESS_DENIED then it means that caller does not have permission to 1022 * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue 1023 * SMB2_OP_QUERY_INFO command. 1024 * 1025 * There is an alternative way how to query limited information about path but still 1026 * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful 1027 * response subset of query information. 1028 * 1029 * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED 1030 * access which will grant the maximum possible access to the file and the response 1031 * will contain required query information for stat() syscall. 1032 */ 1033 1034 if (tcon->posix_extensions) 1035 break; 1036 1037 num_cmds = 1; 1038 cmds[0] = SMB2_OP_OPEN_QUERY; 1039 in_iov[0].iov_base = data; 1040 in_iov[0].iov_len = sizeof(*data); 1041 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED, 1042 FILE_OPEN, create_options, ACL_NO_MODE); 1043 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1044 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1045 &oparms, in_iov, cmds, num_cmds, 1046 cfile, out_iov, out_buftype, NULL); 1047 1048 hdr = out_iov[0].iov_base; 1049 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1050 goto out; 1051 1052 if (!rc) 1053 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1054 break; 1055 case -EOPNOTSUPP: 1056 /* 1057 * BB TODO: When support for special files added to Samba 1058 * re-verify this path. 1059 */ 1060 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1061 if (rc || !data->reparse_point) 1062 goto out; 1063 1064 /* 1065 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create 1066 * response. 1067 */ 1068 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK) { 1069 cmds[num_cmds++] = SMB2_OP_GET_REPARSE; 1070 if (!tcon->posix_extensions) 1071 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA; 1072 } 1073 1074 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1075 FILE_READ_ATTRIBUTES | 1076 FILE_READ_EA | SYNCHRONIZE, 1077 FILE_OPEN, create_options | 1078 OPEN_REPARSE_POINT, ACL_NO_MODE); 1079 cifs_get_readable_path(tcon, full_path, &cfile); 1080 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1081 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1082 &oparms, in_iov, cmds, num_cmds, 1083 cfile, out_iov, out_buftype, NULL); 1084 if (rc && ea_unsupported(cmds, num_cmds, 1085 out_iov, out_buftype)) { 1086 if (data->reparse.tag != IO_REPARSE_TAG_LX_BLK && 1087 data->reparse.tag != IO_REPARSE_TAG_LX_CHR) 1088 rc = 0; 1089 else 1090 rc = -EOPNOTSUPP; 1091 } 1092 1093 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) { 1094 bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY; 1095 rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb); 1096 } 1097 break; 1098 case -EREMOTE: 1099 break; 1100 default: 1101 if (hdr->Status != STATUS_OBJECT_NAME_INVALID) 1102 break; 1103 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 1104 full_path, &islink); 1105 if (rc2) { 1106 rc = rc2; 1107 goto out; 1108 } 1109 if (islink) 1110 rc = -EREMOTE; 1111 } 1112 1113out: 1114 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1115 return rc; 1116} 1117 1118int 1119smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, 1120 struct cifs_tcon *tcon, const char *name, 1121 struct cifs_sb_info *cifs_sb) 1122{ 1123 struct cifs_open_parms oparms; 1124 1125 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1126 FILE_CREATE, CREATE_NOT_FILE, mode); 1127 return smb2_compound_op(xid, tcon, cifs_sb, 1128 name, &oparms, NULL, 1129 &(int){SMB2_OP_MKDIR}, 1, 1130 NULL, NULL, NULL, NULL); 1131} 1132 1133void 1134smb2_mkdir_setinfo(struct inode *inode, const char *name, 1135 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 1136 const unsigned int xid) 1137{ 1138 struct cifs_open_parms oparms; 1139 FILE_BASIC_INFO data = {}; 1140 struct cifsInodeInfo *cifs_i; 1141 struct cifsFileInfo *cfile; 1142 struct kvec in_iov; 1143 u32 dosattrs; 1144 int tmprc; 1145 1146 in_iov.iov_base = &data; 1147 in_iov.iov_len = sizeof(data); 1148 cifs_i = CIFS_I(inode); 1149 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 1150 data.Attributes = cpu_to_le32(dosattrs); 1151 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); 1152 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1153 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE); 1154 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, 1155 &oparms, &in_iov, 1156 &(int){SMB2_OP_SET_INFO}, 1, 1157 cfile, NULL, NULL, NULL); 1158 if (tmprc == 0) 1159 cifs_i->cifsAttrs = dosattrs; 1160} 1161 1162int 1163smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1164 struct cifs_sb_info *cifs_sb) 1165{ 1166 struct cifs_open_parms oparms; 1167 1168 drop_cached_dir_by_name(xid, tcon, name, cifs_sb); 1169 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE, 1170 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE); 1171 return smb2_compound_op(xid, tcon, cifs_sb, 1172 name, &oparms, NULL, 1173 &(int){SMB2_OP_UNLINK}, 1, 1174 NULL, NULL, NULL, NULL); 1175} 1176 1177int 1178smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1179 struct cifs_sb_info *cifs_sb, struct dentry *dentry) 1180{ 1181 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 1182 __le16 *utf16_path __free(kfree) = NULL; 1183 int retries = 0, cur_sleep = 1; 1184 struct TCP_Server_Info *server; 1185 struct cifs_open_parms oparms; 1186 struct smb2_create_req *creq; 1187 struct inode *inode = NULL; 1188 struct smb_rqst rqst[2]; 1189 struct kvec rsp_iov[2]; 1190 struct kvec close_iov; 1191 int resp_buftype[2]; 1192 struct cifs_fid fid; 1193 int flags = 0; 1194 __u8 oplock; 1195 int rc; 1196 1197 utf16_path = cifs_convert_path_to_utf16(name, cifs_sb); 1198 if (!utf16_path) 1199 return -ENOMEM; 1200 1201 if (smb3_encryption_required(tcon)) 1202 flags |= CIFS_TRANSFORM_REQ; 1203again: 1204 oplock = SMB2_OPLOCK_LEVEL_NONE; 1205 server = cifs_pick_channel(tcon->ses); 1206 1207 memset(rqst, 0, sizeof(rqst)); 1208 memset(resp_buftype, 0, sizeof(resp_buftype)); 1209 memset(rsp_iov, 0, sizeof(rsp_iov)); 1210 1211 memset(open_iov, 0, sizeof(open_iov)); 1212 rqst[0].rq_iov = open_iov; 1213 rqst[0].rq_nvec = ARRAY_SIZE(open_iov); 1214 1215 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE | FILE_READ_ATTRIBUTES, 1216 FILE_OPEN, CREATE_DELETE_ON_CLOSE | 1217 OPEN_REPARSE_POINT, ACL_NO_MODE); 1218 oparms.fid = &fid; 1219 1220 if (dentry) { 1221 inode = d_inode(dentry); 1222 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) { 1223 oplock = SMB2_OPLOCK_LEVEL_LEASE; 1224 server->ops->get_lease_key(inode, &fid); 1225 } 1226 } 1227 1228 rc = SMB2_open_init(tcon, server, 1229 &rqst[0], &oplock, &oparms, utf16_path); 1230 if (rc) 1231 goto err_free; 1232 smb2_set_next_command(tcon, &rqst[0]); 1233 creq = rqst[0].rq_iov[0].iov_base; 1234 creq->ShareAccess = FILE_SHARE_DELETE_LE; 1235 1236 memset(&close_iov, 0, sizeof(close_iov)); 1237 rqst[1].rq_iov = &close_iov; 1238 rqst[1].rq_nvec = 1; 1239 1240 rc = SMB2_close_init(tcon, server, &rqst[1], 1241 COMPOUND_FID, COMPOUND_FID, false); 1242 if (rc) 1243 goto err_free; 1244 smb2_set_related(&rqst[1]); 1245 1246 if (retries) { 1247 for (int i = 0; i < ARRAY_SIZE(rqst); i++) 1248 smb2_set_replay(server, &rqst[i]); 1249 } 1250 1251 rc = compound_send_recv(xid, tcon->ses, server, flags, 1252 ARRAY_SIZE(rqst), rqst, 1253 resp_buftype, rsp_iov); 1254 SMB2_open_free(&rqst[0]); 1255 SMB2_close_free(&rqst[1]); 1256 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1257 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1258 1259 if (is_replayable_error(rc) && 1260 smb2_should_replay(tcon, &retries, &cur_sleep)) 1261 goto again; 1262 1263 /* Retry compound request without lease */ 1264 if (rc == -EINVAL && dentry) { 1265 dentry = NULL; 1266 retries = 0; 1267 cur_sleep = 1; 1268 goto again; 1269 } 1270 /* 1271 * If dentry (hence, inode) is NULL, lease break is going to 1272 * take care of degrading leases on handles for deleted files. 1273 */ 1274 if (!rc && inode) 1275 cifs_mark_open_handles_for_deleted_file(inode, name); 1276 1277 return rc; 1278 1279err_free: 1280 SMB2_open_free(&rqst[0]); 1281 SMB2_close_free(&rqst[1]); 1282 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1283 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1284 return rc; 1285} 1286 1287static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 1288 const char *from_name, const char *to_name, 1289 struct cifs_sb_info *cifs_sb, 1290 __u32 create_options, __u32 access, 1291 int command, struct cifsFileInfo *cfile, 1292 struct dentry *dentry) 1293{ 1294 struct cifs_open_parms oparms; 1295 struct kvec in_iov; 1296 __le16 *smb2_to_name = NULL; 1297 int rc; 1298 1299 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 1300 if (smb2_to_name == NULL) { 1301 rc = -ENOMEM; 1302 if (cfile) 1303 cifsFileInfo_put(cfile); 1304 goto smb2_rename_path; 1305 } 1306 in_iov.iov_base = smb2_to_name; 1307 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX); 1308 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN, 1309 create_options, ACL_NO_MODE); 1310 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, 1311 &oparms, &in_iov, &command, 1, 1312 cfile, NULL, NULL, dentry); 1313smb2_rename_path: 1314 kfree(smb2_to_name); 1315 return rc; 1316} 1317 1318int smb2_rename_path(const unsigned int xid, 1319 struct cifs_tcon *tcon, 1320 struct dentry *source_dentry, 1321 const char *from_name, const char *to_name, 1322 struct cifs_sb_info *cifs_sb) 1323{ 1324 struct cifsFileInfo *cfile; 1325 __u32 co = file_create_options(source_dentry); 1326 1327 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb); 1328 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); 1329 1330 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1331 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry); 1332 if (rc == -EINVAL) { 1333 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1334 cifs_get_writable_path(tcon, from_name, 1335 FIND_WR_WITH_DELETE, &cfile); 1336 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1337 co, DELETE, SMB2_OP_RENAME, cfile, NULL); 1338 } 1339 return rc; 1340} 1341 1342int smb2_create_hardlink(const unsigned int xid, 1343 struct cifs_tcon *tcon, 1344 struct dentry *source_dentry, 1345 const char *from_name, const char *to_name, 1346 struct cifs_sb_info *cifs_sb) 1347{ 1348 __u32 co = file_create_options(source_dentry); 1349 1350 return smb2_set_path_attr(xid, tcon, from_name, to_name, 1351 cifs_sb, co, FILE_READ_ATTRIBUTES, 1352 SMB2_OP_HARDLINK, NULL, NULL); 1353} 1354 1355int 1356smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 1357 const char *full_path, __u64 size, 1358 struct cifs_sb_info *cifs_sb, bool set_alloc, 1359 struct dentry *dentry) 1360{ 1361 struct cifs_open_parms oparms; 1362 struct cifsFileInfo *cfile; 1363 struct kvec in_iov; 1364 __le64 eof = cpu_to_le64(size); 1365 int rc; 1366 1367 in_iov.iov_base = &eof; 1368 in_iov.iov_len = sizeof(eof); 1369 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1370 1371 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA, 1372 FILE_OPEN, 0, ACL_NO_MODE); 1373 rc = smb2_compound_op(xid, tcon, cifs_sb, 1374 full_path, &oparms, &in_iov, 1375 &(int){SMB2_OP_SET_EOF}, 1, 1376 cfile, NULL, NULL, dentry); 1377 if (rc == -EINVAL) { 1378 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1379 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1380 rc = smb2_compound_op(xid, tcon, cifs_sb, 1381 full_path, &oparms, &in_iov, 1382 &(int){SMB2_OP_SET_EOF}, 1, 1383 cfile, NULL, NULL, NULL); 1384 } 1385 return rc; 1386} 1387 1388int 1389smb2_set_file_info(struct inode *inode, const char *full_path, 1390 FILE_BASIC_INFO *buf, const unsigned int xid) 1391{ 1392 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), }; 1393 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 1394 struct cifsFileInfo *cfile = NULL; 1395 struct cifs_open_parms oparms; 1396 struct tcon_link *tlink; 1397 struct cifs_tcon *tcon; 1398 int rc = 0; 1399 1400 tlink = cifs_sb_tlink(cifs_sb); 1401 if (IS_ERR(tlink)) 1402 return PTR_ERR(tlink); 1403 tcon = tlink_tcon(tlink); 1404 1405 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && 1406 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0)) { 1407 if (buf->Attributes == 0) 1408 goto out; /* would be a no op, no sense sending this */ 1409 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1410 } 1411 1412 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES, 1413 FILE_OPEN, 0, ACL_NO_MODE); 1414 rc = smb2_compound_op(xid, tcon, cifs_sb, 1415 full_path, &oparms, &in_iov, 1416 &(int){SMB2_OP_SET_INFO}, 1, 1417 cfile, NULL, NULL, NULL); 1418out: 1419 cifs_put_tlink(tlink); 1420 return rc; 1421} 1422 1423struct inode *smb2_create_reparse_inode(struct cifs_open_info_data *data, 1424 struct super_block *sb, 1425 const unsigned int xid, 1426 struct cifs_tcon *tcon, 1427 const char *full_path, 1428 bool directory, 1429 struct kvec *reparse_iov, 1430 struct kvec *xattr_iov) 1431{ 1432 struct cifs_open_parms oparms; 1433 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 1434 struct cifsFileInfo *cfile; 1435 struct inode *new = NULL; 1436 int out_buftype[4] = {}; 1437 struct kvec out_iov[4] = {}; 1438 struct kvec in_iov[2]; 1439 int cmds[2]; 1440 int rc; 1441 int i; 1442 1443 /* 1444 * If server filesystem does not support reparse points then do not 1445 * attempt to create reparse point. This will prevent creating unusable 1446 * empty object on the server. 1447 */ 1448 if (!CIFS_REPARSE_SUPPORT(tcon)) 1449 return ERR_PTR(-EOPNOTSUPP); 1450 1451 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1452 SYNCHRONIZE | DELETE | 1453 FILE_READ_ATTRIBUTES | 1454 FILE_WRITE_ATTRIBUTES, 1455 FILE_CREATE, 1456 (directory ? CREATE_NOT_FILE : CREATE_NOT_DIR) | OPEN_REPARSE_POINT, 1457 ACL_NO_MODE); 1458 if (xattr_iov) 1459 oparms.ea_cctx = xattr_iov; 1460 1461 cmds[0] = SMB2_OP_SET_REPARSE; 1462 in_iov[0] = *reparse_iov; 1463 in_iov[1].iov_base = data; 1464 in_iov[1].iov_len = sizeof(*data); 1465 1466 if (tcon->posix_extensions) { 1467 cmds[1] = SMB2_OP_POSIX_QUERY_INFO; 1468 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1469 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, 1470 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL); 1471 if (!rc) { 1472 rc = smb311_posix_get_inode_info(&new, full_path, 1473 data, sb, xid); 1474 } 1475 } else { 1476 cmds[1] = SMB2_OP_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 = cifs_get_inode_info(&new, full_path, 1482 data, sb, xid, NULL); 1483 } 1484 } 1485 1486 1487 /* 1488 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then 1489 * remove the intermediate object created by CREATE. Otherwise 1490 * empty object stay on the server when reparse call failed. 1491 */ 1492 if (rc && 1493 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER && 1494 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS && 1495 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER || 1496 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS)) 1497 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL); 1498 1499 for (i = 0; i < ARRAY_SIZE(out_buftype); i++) 1500 free_rsp_buf(out_buftype[i], out_iov[i].iov_base); 1501 1502 return rc ? ERR_PTR(rc) : new; 1503} 1504 1505int smb2_query_reparse_point(const unsigned int xid, 1506 struct cifs_tcon *tcon, 1507 struct cifs_sb_info *cifs_sb, 1508 const char *full_path, 1509 u32 *tag, struct kvec *rsp, 1510 int *rsp_buftype) 1511{ 1512 struct cifs_open_parms oparms; 1513 struct cifs_open_info_data data = {}; 1514 struct cifsFileInfo *cfile; 1515 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), }; 1516 int rc; 1517 1518 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 1519 1520 cifs_get_readable_path(tcon, full_path, &cfile); 1521 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1522 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE, 1523 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE); 1524 rc = smb2_compound_op(xid, tcon, cifs_sb, 1525 full_path, &oparms, &in_iov, 1526 &(int){SMB2_OP_GET_REPARSE}, 1, 1527 cfile, NULL, NULL, NULL); 1528 if (rc) 1529 goto out; 1530 1531 *tag = data.reparse.tag; 1532 *rsp = data.reparse.io.iov; 1533 *rsp_buftype = data.reparse.io.buftype; 1534 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov)); 1535 data.reparse.io.buftype = CIFS_NO_BUFFER; 1536out: 1537 cifs_free_open_info(&data); 1538 return rc; 1539} 1540 1541static inline __le16 *utf16_smb2_path(struct cifs_sb_info *cifs_sb, 1542 const char *name, size_t namelen) 1543{ 1544 int len; 1545 1546 if (*name == '\\' || 1547 (cifs_sb_master_tlink(cifs_sb) && 1548 cifs_sb_master_tcon(cifs_sb)->posix_extensions && *name == '/')) 1549 name++; 1550 return cifs_strndup_to_utf16(name, namelen, &len, 1551 cifs_sb->local_nls, 1552 cifs_remap(cifs_sb)); 1553} 1554 1555int smb2_rename_pending_delete(const char *full_path, 1556 struct dentry *dentry, 1557 const unsigned int xid) 1558{ 1559 struct cifs_sb_info *cifs_sb = CIFS_SB(d_inode(dentry)->i_sb); 1560 struct cifsInodeInfo *cinode = CIFS_I(d_inode(dentry)); 1561 __le16 *utf16_path __free(kfree) = NULL; 1562 __u32 co = file_create_options(dentry); 1563 int cmds[] = { 1564 SMB2_OP_SET_INFO, 1565 SMB2_OP_RENAME, 1566 SMB2_OP_UNLINK, 1567 }; 1568 const int num_cmds = ARRAY_SIZE(cmds); 1569 char *to_name __free(kfree) = NULL; 1570 __u32 attrs = cinode->cifsAttrs; 1571 struct cifs_open_parms oparms; 1572 static atomic_t sillycounter; 1573 struct cifsFileInfo *cfile; 1574 struct tcon_link *tlink; 1575 struct cifs_tcon *tcon; 1576 struct kvec iov[2]; 1577 const char *ppath; 1578 void *page; 1579 size_t len; 1580 int rc; 1581 1582 tlink = cifs_sb_tlink(cifs_sb); 1583 if (IS_ERR(tlink)) 1584 return PTR_ERR(tlink); 1585 tcon = tlink_tcon(tlink); 1586 1587 page = alloc_dentry_path(); 1588 1589 ppath = build_path_from_dentry(dentry->d_parent, page); 1590 if (IS_ERR(ppath)) { 1591 rc = PTR_ERR(ppath); 1592 goto out; 1593 } 1594 1595 len = strlen(ppath) + strlen("/.__smb1234") + 1; 1596 to_name = kmalloc(len, GFP_KERNEL); 1597 if (!to_name) { 1598 rc = -ENOMEM; 1599 goto out; 1600 } 1601 1602 scnprintf(to_name, len, "%s%c.__smb%04X", ppath, CIFS_DIR_SEP(cifs_sb), 1603 atomic_inc_return(&sillycounter) & 0xffff); 1604 1605 utf16_path = utf16_smb2_path(cifs_sb, to_name, len); 1606 if (!utf16_path) { 1607 rc = -ENOMEM; 1608 goto out; 1609 } 1610 1611 drop_cached_dir_by_name(xid, tcon, full_path, cifs_sb); 1612 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1613 DELETE | FILE_WRITE_ATTRIBUTES, 1614 FILE_OPEN, co, ACL_NO_MODE); 1615 1616 attrs &= ~ATTR_READONLY; 1617 if (!attrs) 1618 attrs = ATTR_NORMAL; 1619 if (d_inode(dentry)->i_nlink <= 1) 1620 attrs |= ATTR_HIDDEN; 1621 iov[0].iov_base = &(FILE_BASIC_INFO) { 1622 .Attributes = cpu_to_le32(attrs), 1623 }; 1624 iov[0].iov_len = sizeof(FILE_BASIC_INFO); 1625 iov[1].iov_base = utf16_path; 1626 iov[1].iov_len = sizeof(*utf16_path) * UniStrlen((wchar_t *)utf16_path); 1627 1628 cifs_get_writable_path(tcon, full_path, FIND_WR_WITH_DELETE, &cfile); 1629 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, iov, 1630 cmds, num_cmds, cfile, NULL, NULL, dentry); 1631 if (rc == -EINVAL) { 1632 cifs_dbg(FYI, "invalid lease key, resending request without lease\n"); 1633 cifs_get_writable_path(tcon, full_path, 1634 FIND_WR_WITH_DELETE, &cfile); 1635 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, iov, 1636 cmds, num_cmds, cfile, NULL, NULL, NULL); 1637 } 1638 if (!rc) { 1639 set_bit(CIFS_INO_DELETE_PENDING, &cinode->flags); 1640 } else { 1641 cifs_tcon_dbg(FYI, "%s: failed to rename '%s' to '%s': %d\n", 1642 __func__, full_path, to_name, rc); 1643 rc = smb_EIO1(smb_eio_trace_pend_del_fail, rc); 1644 } 1645out: 1646 cifs_put_tlink(tlink); 1647 free_dentry_path(page); 1648 return rc; 1649}
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