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 "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cached_dir.h"
  27 #include "smb2status.h"
  28
  29 static struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov)
  30 {
  31         struct reparse_data_buffer *buf;
  32         struct smb2_ioctl_rsp *io = iov->iov_base;
  33         u32 off, count, len;
  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(-EIO);
  39
  40         buf = (struct reparse_data_buffer *)((u8 *)io + off);
  41         len = sizeof(*buf);
  42         if (count < len || count < le16_to_cpu(buf->ReparseDataLength) + len)
  43                 return ERR_PTR(-EIO);
  44         return buf;
  45 }
  46
  47 static inline __u32 file_create_options(struct dentry *dentry)
  48 {
  49         struct cifsInodeInfo *ci;
  50
  51         if (dentry) {
  52                 ci = CIFS_I(d_inode(dentry));
  53                 if (ci->cifsAttrs & ATTR_REPARSE)
  54                         return OPEN_REPARSE_POINT;
  55         }
  56         return 0;
  57 }
  58
  59 /* Parse owner and group from SMB3.1.1 POSIX query info */
  60 static int parse_posix_sids(struct cifs_open_info_data *data,
  61                             struct kvec *rsp_iov)
  62 {
  63         struct smb2_query_info_rsp *qi = rsp_iov->iov_base;
  64         unsigned int out_len = le32_to_cpu(qi->OutputBufferLength);
  65         unsigned int qi_len = sizeof(data->posix_fi);
  66         int owner_len, group_len;
  67         u8 *sidsbuf, *sidsbuf_end;
  68
  69         if (out_len <= qi_len)
  70                 return -EINVAL;
  71
  72         sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len;
  73         sidsbuf_end = sidsbuf + out_len - qi_len;
  74
  75         owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
  76         if (owner_len == -1)
  77                 return -EINVAL;
  78
  79         memcpy(&data->posix_owner, sidsbuf, owner_len);
  80         group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end);
  81         if (group_len == -1)
  82                 return -EINVAL;
  83
  84         memcpy(&data->posix_group, sidsbuf + owner_len, group_len);
  85         return 0;
  86 }
  87
  88 /*
  89  * note: If cfile is passed, the reference to it is dropped here.
  90  * So make sure that you do not reuse cfile after return from this func.
  91  *
  92  * If passing @out_iov and @out_buftype, ensure to make them both large enough
  93  * (>= 3) to hold all compounded responses.  Caller is also responsible for
  94  * freeing them up with free_rsp_buf().
  95  */
  96 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  97                             struct cifs_sb_info *cifs_sb, const char *full_path,
  98                             __u32 desired_access, __u32 create_disposition,
  99                             __u32 create_options, umode_t mode, struct kvec *in_iov,
 100                             int *cmds, int num_cmds, struct cifsFileInfo *cfile,
 101                             struct kvec *out_iov, int *out_buftype)
 102 {
 103
 104         struct reparse_data_buffer *rbuf;
 105         struct smb2_compound_vars *vars = NULL;
 106         struct kvec *rsp_iov, *iov;
 107         struct smb_rqst *rqst;
 108         int rc;
 109         __le16 *utf16_path = NULL;
 110         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 111         struct cifs_fid fid;
 112         struct cifs_ses *ses = tcon->ses;
 113         struct TCP_Server_Info *server;
 114         int num_rqst = 0, i;
 115         int resp_buftype[MAX_COMPOUND];
 116         struct smb2_query_info_rsp *qi_rsp = NULL;
 117         struct cifs_open_info_data *idata;
 118         int flags = 0;
 119         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
 120         unsigned int size[2];
 121         void *data[2];
 122         int len;
 123
 124         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
 125         if (vars == NULL)
 126                 return -ENOMEM;
 127         rqst = &vars->rqst[0];
 128         rsp_iov = &vars->rsp_iov[0];
 129
 130         server = cifs_pick_channel(ses);
 131
 132         if (smb3_encryption_required(tcon))
 133                 flags |= CIFS_TRANSFORM_REQ;
 134
 135         for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
 136                 resp_buftype[i] = CIFS_NO_BUFFER;
 137
 138         /* We already have a handle so we can skip the open */
 139         if (cfile)
 140                 goto after_open;
 141
 142         /* Open */
 143         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 144         if (!utf16_path) {
 145                 rc = -ENOMEM;
 146                 goto finished;
 147         }
 148
 149         vars->oparms = (struct cifs_open_parms) {
 150                 .tcon = tcon,
 151                 .path = full_path,
 152                 .desired_access = desired_access,
 153                 .disposition = create_disposition,
 154                 .create_options = cifs_create_options(cifs_sb, create_options),
 155                 .fid = &fid,
 156                 .mode = mode,
 157                 .cifs_sb = cifs_sb,
 158         };
 159
 160         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 161         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 162         rc = SMB2_open_init(tcon, server,
 163                             &rqst[num_rqst], &oplock, &vars->oparms,
 164                             utf16_path);
 165         kfree(utf16_path);
 166         if (rc)
 167                 goto finished;
 168
 169         smb2_set_next_command(tcon, &rqst[num_rqst]);
 170  after_open:
 171         num_rqst++;
 172         rc = 0;
 173
 174         for (i = 0; i < num_cmds; i++) {
 175                 /* Operation */
 176                 switch (cmds[i]) {
 177                 case SMB2_OP_QUERY_INFO:
 178                         rqst[num_rqst].rq_iov = &vars->qi_iov;
 179                         rqst[num_rqst].rq_nvec = 1;
 180
 181                         if (cfile) {
 182                                 rc = SMB2_query_info_init(tcon, server,
 183                                                           &rqst[num_rqst],
 184                                                           cfile->fid.persistent_fid,
 185                                                           cfile->fid.volatile_fid,
 186                                                           FILE_ALL_INFORMATION,
 187                                                           SMB2_O_INFO_FILE, 0,
 188                                                           sizeof(struct smb2_file_all_info) +
 189                                                           PATH_MAX * 2, 0, NULL);
 190                         } else {
 191                                 rc = SMB2_query_info_init(tcon, server,
 192                                                           &rqst[num_rqst],
 193                                                           COMPOUND_FID,
 194                                                           COMPOUND_FID,
 195                                                           FILE_ALL_INFORMATION,
 196                                                           SMB2_O_INFO_FILE, 0,
 197                                                           sizeof(struct smb2_file_all_info) +
 198                                                           PATH_MAX * 2, 0, NULL);
 199                                 if (!rc) {
 200                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 201                                         smb2_set_related(&rqst[num_rqst]);
 202                                 }
 203                         }
 204
 205                         if (rc)
 206                                 goto finished;
 207                         num_rqst++;
 208                         trace_smb3_query_info_compound_enter(xid, ses->Suid,
 209                                                              tcon->tid, full_path);
 210                         break;
 211                 case SMB2_OP_POSIX_QUERY_INFO:
 212                         rqst[num_rqst].rq_iov = &vars->qi_iov;
 213                         rqst[num_rqst].rq_nvec = 1;
 214
 215                         if (cfile) {
 216                                 /* TBD: fix following to allow for longer SIDs */
 217                                 rc = SMB2_query_info_init(tcon, server,
 218                                                           &rqst[num_rqst],
 219                                                           cfile->fid.persistent_fid,
 220                                                           cfile->fid.volatile_fid,
 221                                                           SMB_FIND_FILE_POSIX_INFO,
 222                                                           SMB2_O_INFO_FILE, 0,
 223                                                           sizeof(struct smb311_posix_qinfo *) +
 224                                                           (PATH_MAX * 2) +
 225                                                           (sizeof(struct cifs_sid) * 2), 0, NULL);
 226                         } else {
 227                                 rc = SMB2_query_info_init(tcon, server,
 228                                                           &rqst[num_rqst],
 229                                                           COMPOUND_FID,
 230                                                           COMPOUND_FID,
 231                                                           SMB_FIND_FILE_POSIX_INFO,
 232                                                           SMB2_O_INFO_FILE, 0,
 233                                                           sizeof(struct smb311_posix_qinfo *) +
 234                                                           (PATH_MAX * 2) +
 235                                                           (sizeof(struct cifs_sid) * 2), 0, NULL);
 236                                 if (!rc) {
 237                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 238                                         smb2_set_related(&rqst[num_rqst]);
 239                                 }
 240                         }
 241
 242                         if (rc)
 243                                 goto finished;
 244                         num_rqst++;
 245                         trace_smb3_posix_query_info_compound_enter(xid, ses->Suid,
 246                                                                    tcon->tid, full_path);
 247                         break;
 248                 case SMB2_OP_DELETE:
 249                         trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 250                         break;
 251                 case SMB2_OP_MKDIR:
 252                         /*
 253                          * Directories are created through parameters in the
 254                          * SMB2_open() call.
 255                          */
 256                         trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 257                         break;
 258                 case SMB2_OP_RMDIR:
 259                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 260                         rqst[num_rqst].rq_nvec = 1;
 261
 262                         size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 263                         data[0] = &delete_pending[0];
 264
 265                         rc = SMB2_set_info_init(tcon, server,
 266                                                 &rqst[num_rqst], COMPOUND_FID,
 267                                                 COMPOUND_FID, current->tgid,
 268                                                 FILE_DISPOSITION_INFORMATION,
 269                                                 SMB2_O_INFO_FILE, 0, data, size);
 270                         if (rc)
 271                                 goto finished;
 272                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 273                         smb2_set_related(&rqst[num_rqst++]);
 274                         trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 275                         break;
 276                 case SMB2_OP_SET_EOF:
 277                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 278                         rqst[num_rqst].rq_nvec = 1;
 279
 280                         size[0] = in_iov[i].iov_len;
 281                         data[0] = in_iov[i].iov_base;
 282
 283                         if (cfile) {
 284                                 rc = SMB2_set_info_init(tcon, server,
 285                                                         &rqst[num_rqst],
 286                                                         cfile->fid.persistent_fid,
 287                                                         cfile->fid.volatile_fid,
 288                                                         current->tgid,
 289                                                         FILE_END_OF_FILE_INFORMATION,
 290                                                         SMB2_O_INFO_FILE, 0,
 291                                                         data, size);
 292                         } else {
 293                                 rc = SMB2_set_info_init(tcon, server,
 294                                                         &rqst[num_rqst],
 295                                                         COMPOUND_FID,
 296                                                         COMPOUND_FID,
 297                                                         current->tgid,
 298                                                         FILE_END_OF_FILE_INFORMATION,
 299                                                         SMB2_O_INFO_FILE, 0,
 300                                                         data, size);
 301                                 if (!rc) {
 302                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 303                                         smb2_set_related(&rqst[num_rqst]);
 304                                 }
 305                         }
 306                         if (rc)
 307                                 goto finished;
 308                         num_rqst++;
 309                         trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 310                         break;
 311                 case SMB2_OP_SET_INFO:
 312                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 313                         rqst[num_rqst].rq_nvec = 1;
 314
 315                         size[0] = in_iov[i].iov_len;
 316                         data[0] = in_iov[i].iov_base;
 317
 318                         if (cfile) {
 319                                 rc = SMB2_set_info_init(tcon, server,
 320                                                         &rqst[num_rqst],
 321                                                         cfile->fid.persistent_fid,
 322                                                         cfile->fid.volatile_fid, current->tgid,
 323                                                         FILE_BASIC_INFORMATION,
 324                                                         SMB2_O_INFO_FILE, 0, data, size);
 325                         } else {
 326                                 rc = SMB2_set_info_init(tcon, server,
 327                                                         &rqst[num_rqst],
 328                                                         COMPOUND_FID,
 329                                                         COMPOUND_FID, current->tgid,
 330                                                         FILE_BASIC_INFORMATION,
 331                                                         SMB2_O_INFO_FILE, 0, data, size);
 332                                 if (!rc) {
 333                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 334                                         smb2_set_related(&rqst[num_rqst]);
 335                                 }
 336                         }
 337
 338                         if (rc)
 339                                 goto finished;
 340                         num_rqst++;
 341                         trace_smb3_set_info_compound_enter(xid, ses->Suid,
 342                                                            tcon->tid, full_path);
 343                         break;
 344                 case SMB2_OP_RENAME:
 345                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 346                         rqst[num_rqst].rq_nvec = 2;
 347
 348                         len = in_iov[i].iov_len;
 349
 350                         vars->rename_info.ReplaceIfExists = 1;
 351                         vars->rename_info.RootDirectory = 0;
 352                         vars->rename_info.FileNameLength = cpu_to_le32(len);
 353
 354                         size[0] = sizeof(struct smb2_file_rename_info);
 355                         data[0] = &vars->rename_info;
 356
 357                         size[1] = len + 2 /* null */;
 358                         data[1] = in_iov[i].iov_base;
 359
 360                         if (cfile) {
 361                                 rc = SMB2_set_info_init(tcon, server,
 362                                                         &rqst[num_rqst],
 363                                                         cfile->fid.persistent_fid,
 364                                                         cfile->fid.volatile_fid,
 365                                                         current->tgid, FILE_RENAME_INFORMATION,
 366                                                         SMB2_O_INFO_FILE, 0, data, size);
 367                         } else {
 368                                 rc = SMB2_set_info_init(tcon, server,
 369                                                         &rqst[num_rqst],
 370                                                         COMPOUND_FID, COMPOUND_FID,
 371                                                         current->tgid, FILE_RENAME_INFORMATION,
 372                                                         SMB2_O_INFO_FILE, 0, data, size);
 373                                 if (!rc) {
 374                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 375                                         smb2_set_related(&rqst[num_rqst]);
 376                                 }
 377                         }
 378                         if (rc)
 379                                 goto finished;
 380                         num_rqst++;
 381                         trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 382                         break;
 383                 case SMB2_OP_HARDLINK:
 384                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 385                         rqst[num_rqst].rq_nvec = 2;
 386
 387                         len = in_iov[i].iov_len;
 388
 389                         vars->link_info.ReplaceIfExists = 0;
 390                         vars->link_info.RootDirectory = 0;
 391                         vars->link_info.FileNameLength = cpu_to_le32(len);
 392
 393                         size[0] = sizeof(struct smb2_file_link_info);
 394                         data[0] = &vars->link_info;
 395
 396                         size[1] = len + 2 /* null */;
 397                         data[1] = in_iov[i].iov_base;
 398
 399                         rc = SMB2_set_info_init(tcon, server,
 400                                                 &rqst[num_rqst], COMPOUND_FID,
 401                                                 COMPOUND_FID, current->tgid,
 402                                                 FILE_LINK_INFORMATION,
 403                                                 SMB2_O_INFO_FILE, 0, data, size);
 404                         if (rc)
 405                                 goto finished;
 406                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 407                         smb2_set_related(&rqst[num_rqst++]);
 408                         trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 409                         break;
 410                 case SMB2_OP_SET_REPARSE:
 411                         rqst[num_rqst].rq_iov = vars->io_iov;
 412                         rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
 413
 414                         rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
 415                                              COMPOUND_FID, COMPOUND_FID,
 416                                              FSCTL_SET_REPARSE_POINT,
 417                                              in_iov[i].iov_base,
 418                                              in_iov[i].iov_len, 0);
 419                         if (rc)
 420                                 goto finished;
 421                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 422                         smb2_set_related(&rqst[num_rqst++]);
 423                         trace_smb3_set_reparse_compound_enter(xid, ses->Suid,
 424                                                               tcon->tid, full_path);
 425                         break;
 426                 case SMB2_OP_GET_REPARSE:
 427                         rqst[num_rqst].rq_iov = vars->io_iov;
 428                         rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
 429
 430                         rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
 431                                              COMPOUND_FID, COMPOUND_FID,
 432                                              FSCTL_GET_REPARSE_POINT,
 433                                              NULL, 0, CIFSMaxBufSize);
 434                         if (rc)
 435                                 goto finished;
 436                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 437                         smb2_set_related(&rqst[num_rqst++]);
 438                         trace_smb3_get_reparse_compound_enter(xid, ses->Suid,
 439                                                               tcon->tid, full_path);
 440                         break;
 441                 default:
 442                         cifs_dbg(VFS, "Invalid command\n");
 443                         rc = -EINVAL;
 444                 }
 445         }
 446         if (rc)
 447                 goto finished;
 448
 449         /* We already have a handle so we can skip the close */
 450         if (cfile)
 451                 goto after_close;
 452         /* Close */
 453         flags |= CIFS_CP_CREATE_CLOSE_OP;
 454         rqst[num_rqst].rq_iov = &vars->close_iov;
 455         rqst[num_rqst].rq_nvec = 1;
 456         rc = SMB2_close_init(tcon, server,
 457                              &rqst[num_rqst], COMPOUND_FID,
 458                              COMPOUND_FID, false);
 459         smb2_set_related(&rqst[num_rqst]);
 460         if (rc)
 461                 goto finished;
 462  after_close:
 463         num_rqst++;
 464
 465         if (cfile) {
 466                 rc = compound_send_recv(xid, ses, server,
 467                                         flags, num_rqst - 2,
 468                                         &rqst[1], &resp_buftype[1],
 469                                         &rsp_iov[1]);
 470         } else
 471                 rc = compound_send_recv(xid, ses, server,
 472                                         flags, num_rqst,
 473                                         rqst, resp_buftype,
 474                                         rsp_iov);
 475
 476 finished:
 477         num_rqst = 0;
 478         SMB2_open_free(&rqst[num_rqst++]);
 479         if (rc == -EREMCHG) {
 480                 pr_warn_once("server share %s deleted\n", tcon->tree_name);
 481                 tcon->need_reconnect = true;
 482         }
 483
 484         for (i = 0; i < num_cmds; i++) {
 485                 switch (cmds[i]) {
 486                 case SMB2_OP_QUERY_INFO:
 487                         idata = in_iov[i].iov_base;
 488                         if (rc == 0 && cfile && cfile->symlink_target) {
 489                                 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 490                                 if (!idata->symlink_target)
 491                                         rc = -ENOMEM;
 492                         }
 493                         if (rc == 0) {
 494                                 qi_rsp = (struct smb2_query_info_rsp *)
 495                                         rsp_iov[i + 1].iov_base;
 496                                 rc = smb2_validate_and_copy_iov(
 497                                         le16_to_cpu(qi_rsp->OutputBufferOffset),
 498                                         le32_to_cpu(qi_rsp->OutputBufferLength),
 499                                         &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
 500                         }
 501                         SMB2_query_info_free(&rqst[num_rqst++]);
 502                         if (rc)
 503                                 trace_smb3_query_info_compound_err(xid,  ses->Suid,
 504                                                                    tcon->tid, rc);
 505                         else
 506                                 trace_smb3_query_info_compound_done(xid, ses->Suid,
 507                                                                     tcon->tid);
 508                         break;
 509                 case SMB2_OP_POSIX_QUERY_INFO:
 510                         idata = in_iov[i].iov_base;
 511                         if (rc == 0 && cfile && cfile->symlink_target) {
 512                                 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 513                                 if (!idata->symlink_target)
 514                                         rc = -ENOMEM;
 515                         }
 516                         if (rc == 0) {
 517                                 qi_rsp = (struct smb2_query_info_rsp *)
 518                                         rsp_iov[i + 1].iov_base;
 519                                 rc = smb2_validate_and_copy_iov(
 520                                         le16_to_cpu(qi_rsp->OutputBufferOffset),
 521                                         le32_to_cpu(qi_rsp->OutputBufferLength),
 522                                         &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
 523                                         (char *)&idata->posix_fi);
 524                         }
 525                         if (rc == 0)
 526                                 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
 527
 528                         SMB2_query_info_free(&rqst[num_rqst++]);
 529                         if (rc)
 530                                 trace_smb3_posix_query_info_compound_err(xid,  ses->Suid,
 531                                                                          tcon->tid, rc);
 532                         else
 533                                 trace_smb3_posix_query_info_compound_done(xid, ses->Suid,
 534                                                                           tcon->tid);
 535                         break;
 536                 case SMB2_OP_DELETE:
 537                         if (rc)
 538                                 trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 539                         else
 540                                 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 541                         break;
 542                 case SMB2_OP_MKDIR:
 543                         if (rc)
 544                                 trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 545                         else
 546                                 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 547                         break;
 548                 case SMB2_OP_HARDLINK:
 549                         if (rc)
 550                                 trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 551                         else
 552                                 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 553                         SMB2_set_info_free(&rqst[num_rqst++]);
 554                         break;
 555                 case SMB2_OP_RENAME:
 556                         if (rc)
 557                                 trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 558                         else
 559                                 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 560                         SMB2_set_info_free(&rqst[num_rqst++]);
 561                         break;
 562                 case SMB2_OP_RMDIR:
 563                         if (rc)
 564                                 trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 565                         else
 566                                 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 567                         SMB2_set_info_free(&rqst[num_rqst++]);
 568                         break;
 569                 case SMB2_OP_SET_EOF:
 570                         if (rc)
 571                                 trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 572                         else
 573                                 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 574                         SMB2_set_info_free(&rqst[num_rqst++]);
 575                         break;
 576                 case SMB2_OP_SET_INFO:
 577                         if (rc)
 578                                 trace_smb3_set_info_compound_err(xid,  ses->Suid,
 579                                                                  tcon->tid, rc);
 580                         else
 581                                 trace_smb3_set_info_compound_done(xid, ses->Suid,
 582                                                                   tcon->tid);
 583                         SMB2_set_info_free(&rqst[num_rqst++]);
 584                         break;
 585                 case SMB2_OP_SET_REPARSE:
 586                         if (rc) {
 587                                 trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 588                                                                     tcon->tid, rc);
 589                         } else {
 590                                 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
 591                                                                      tcon->tid);
 592                         }
 593                         SMB2_ioctl_free(&rqst[num_rqst++]);
 594                         break;
 595                 case SMB2_OP_GET_REPARSE:
 596                         if (!rc) {
 597                                 iov = &rsp_iov[i + 1];
 598                                 idata = in_iov[i].iov_base;
 599                                 idata->reparse.io.iov = *iov;
 600                                 idata->reparse.io.buftype = resp_buftype[i + 1];
 601                                 rbuf = reparse_buf_ptr(iov);
 602                                 if (IS_ERR(rbuf)) {
 603                                         rc = PTR_ERR(rbuf);
 604                                         trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 605                                                                             tcon->tid, rc);
 606                                 } else {
 607                                         idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
 608                                         trace_smb3_set_reparse_compound_done(xid, ses->Suid,
 609                                                                              tcon->tid);
 610                                 }
 611                                 memset(iov, 0, sizeof(*iov));
 612                                 resp_buftype[i + 1] = CIFS_NO_BUFFER;
 613                         } else {
 614                                 trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 615                                                                     tcon->tid, rc);
 616                         }
 617                         SMB2_ioctl_free(&rqst[num_rqst++]);
 618                         break;
 619                 }
 620         }
 621         SMB2_close_free(&rqst[num_rqst]);
 622
 623         if (cfile)
 624                 cifsFileInfo_put(cfile);
 625
 626         num_cmds += 2;
 627         if (out_iov && out_buftype) {
 628                 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
 629                 memcpy(out_buftype, resp_buftype,
 630                        num_cmds * sizeof(*out_buftype));
 631         } else {
 632                 for (i = 0; i < num_cmds; i++)
 633                         free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
 634         }
 635         kfree(vars);
 636         return rc;
 637 }
 638
 639 static int parse_create_response(struct cifs_open_info_data *data,
 640                                  struct cifs_sb_info *cifs_sb,
 641                                  const struct kvec *iov)
 642 {
 643         struct smb2_create_rsp *rsp = iov->iov_base;
 644         bool reparse_point = false;
 645         u32 tag = 0;
 646         int rc = 0;
 647
 648         switch (rsp->hdr.Status) {
 649         case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
 650                 reparse_point = true;
 651                 break;
 652         case STATUS_STOPPED_ON_SYMLINK:
 653                 rc = smb2_parse_symlink_response(cifs_sb, iov,
 654                                                  &data->symlink_target);
 655                 if (rc)
 656                         return rc;
 657                 tag = IO_REPARSE_TAG_SYMLINK;
 658                 reparse_point = true;
 659                 break;
 660         case STATUS_SUCCESS:
 661                 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
 662                 break;
 663         }
 664         data->reparse_point = reparse_point;
 665         data->reparse.tag = tag;
 666         return rc;
 667 }
 668
 669 int smb2_query_path_info(const unsigned int xid,
 670                          struct cifs_tcon *tcon,
 671                          struct cifs_sb_info *cifs_sb,
 672                          const char *full_path,
 673                          struct cifs_open_info_data *data)
 674 {
 675         __u32 create_options = 0;
 676         struct cifsFileInfo *cfile;
 677         struct cached_fid *cfid = NULL;
 678         struct smb2_hdr *hdr;
 679         struct kvec in_iov[2], out_iov[3] = {};
 680         int out_buftype[3] = {};
 681         int cmds[2];
 682         bool islink;
 683         int i, num_cmds;
 684         int rc, rc2;
 685
 686         data->adjust_tz = false;
 687         data->reparse_point = false;
 688
 689         /*
 690          * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
 691          * Create SMB2_query_posix_info worker function to do non-compounded
 692          * query when we already have an open file handle for this. For now this
 693          * is fast enough (always using the compounded version).
 694          */
 695         if (!tcon->posix_extensions) {
 696                 if (*full_path) {
 697                         rc = -ENOENT;
 698                 } else {
 699                         rc = open_cached_dir(xid, tcon, full_path,
 700                                              cifs_sb, false, &cfid);
 701                 }
 702                 /* If it is a root and its handle is cached then use it */
 703                 if (!rc) {
 704                         if (cfid->file_all_info_is_valid) {
 705                                 memcpy(&data->fi, &cfid->file_all_info,
 706                                        sizeof(data->fi));
 707                         } else {
 708                                 rc = SMB2_query_info(xid, tcon,
 709                                                      cfid->fid.persistent_fid,
 710                                                      cfid->fid.volatile_fid,
 711                                                      &data->fi);
 712                         }
 713                         close_cached_dir(cfid);
 714                         return rc;
 715                 }
 716                 cmds[0] = SMB2_OP_QUERY_INFO;
 717         } else {
 718                 cmds[0] = SMB2_OP_POSIX_QUERY_INFO;
 719         }
 720
 721         in_iov[0].iov_base = data;
 722         in_iov[0].iov_len = sizeof(*data);
 723         in_iov[1] = in_iov[0];
 724
 725         cifs_get_readable_path(tcon, full_path, &cfile);
 726         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 727                               FILE_READ_ATTRIBUTES, FILE_OPEN,
 728                               create_options, ACL_NO_MODE, in_iov,
 729                               cmds, 1, cfile, out_iov, out_buftype);
 730         hdr = out_iov[0].iov_base;
 731         /*
 732          * If first iov is unset, then SMB session was dropped or we've got a
 733          * cached open file (@cfile).
 734          */
 735         if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
 736                 goto out;
 737
 738         switch (rc) {
 739         case 0:
 740         case -EOPNOTSUPP:
 741                 /*
 742                  * BB TODO: When support for special files added to Samba
 743                  * re-verify this path.
 744                  */
 745                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 746                 if (rc || !data->reparse_point)
 747                         goto out;
 748
 749                 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK) {
 750                         /* symlink already parsed in create response */
 751                         num_cmds = 1;
 752                 } else {
 753                         cmds[1] = SMB2_OP_GET_REPARSE;
 754                         num_cmds = 2;
 755                 }
 756                 create_options |= OPEN_REPARSE_POINT;
 757                 cifs_get_readable_path(tcon, full_path, &cfile);
 758                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 759                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 760                                       create_options, ACL_NO_MODE, in_iov,
 761                                       cmds, num_cmds, cfile, NULL, NULL);
 762                 break;
 763         case -EREMOTE:
 764                 break;
 765         default:
 766                 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
 767                         break;
 768                 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 769                                                      full_path, &islink);
 770                 if (rc2) {
 771                         rc = rc2;
 772                         goto out;
 773                 }
 774                 if (islink)
 775                         rc = -EREMOTE;
 776         }
 777
 778 out:
 779         for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
 780                 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
 781         return rc;
 782 }
 783
 784 int
 785 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 786            struct cifs_tcon *tcon, const char *name,
 787            struct cifs_sb_info *cifs_sb)
 788 {
 789         return smb2_compound_op(xid, tcon, cifs_sb, name,
 790                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 791                                 CREATE_NOT_FILE, mode,
 792                                 NULL, &(int){SMB2_OP_MKDIR}, 1,
 793                                 NULL, NULL, NULL);
 794 }
 795
 796 void
 797 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 798                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 799                    const unsigned int xid)
 800 {
 801         FILE_BASIC_INFO data = {};
 802         struct cifsInodeInfo *cifs_i;
 803         struct cifsFileInfo *cfile;
 804         struct kvec in_iov;
 805         u32 dosattrs;
 806         int tmprc;
 807
 808         in_iov.iov_base = &data;
 809         in_iov.iov_len = sizeof(data);
 810         cifs_i = CIFS_I(inode);
 811         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 812         data.Attributes = cpu_to_le32(dosattrs);
 813         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 814         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 815                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 816                                  CREATE_NOT_FILE, ACL_NO_MODE, &in_iov,
 817                                  &(int){SMB2_OP_SET_INFO}, 1,
 818                                  cfile, NULL, NULL);
 819         if (tmprc == 0)
 820                 cifs_i->cifsAttrs = dosattrs;
 821 }
 822
 823 int
 824 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 825            struct cifs_sb_info *cifs_sb)
 826 {
 827         drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
 828         return smb2_compound_op(xid, tcon, cifs_sb, name,
 829                                 DELETE, FILE_OPEN, CREATE_NOT_FILE,
 830                                 ACL_NO_MODE, NULL,
 831                                 &(int){SMB2_OP_RMDIR}, 1,
 832                                 NULL, NULL, NULL);
 833 }
 834
 835 int
 836 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 837             struct cifs_sb_info *cifs_sb)
 838 {
 839         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 840                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 841                                 ACL_NO_MODE, NULL,
 842                                 &(int){SMB2_OP_DELETE}, 1,
 843                                 NULL, NULL, NULL);
 844 }
 845
 846 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 847                               const char *from_name, const char *to_name,
 848                               struct cifs_sb_info *cifs_sb,
 849                               __u32 create_options, __u32 access,
 850                               int command, struct cifsFileInfo *cfile)
 851 {
 852         struct kvec in_iov;
 853         __le16 *smb2_to_name = NULL;
 854         int rc;
 855
 856         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 857         if (smb2_to_name == NULL) {
 858                 rc = -ENOMEM;
 859                 goto smb2_rename_path;
 860         }
 861         in_iov.iov_base = smb2_to_name;
 862         in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
 863         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 864                               FILE_OPEN, create_options, ACL_NO_MODE,
 865                               &in_iov, &command, 1, cfile, NULL, NULL);
 866 smb2_rename_path:
 867         kfree(smb2_to_name);
 868         return rc;
 869 }
 870
 871 int smb2_rename_path(const unsigned int xid,
 872                      struct cifs_tcon *tcon,
 873                      struct dentry *source_dentry,
 874                      const char *from_name, const char *to_name,
 875                      struct cifs_sb_info *cifs_sb)
 876 {
 877         struct cifsFileInfo *cfile;
 878         __u32 co = file_create_options(source_dentry);
 879
 880         drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
 881         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 882
 883         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 884                                   co, DELETE, SMB2_OP_RENAME, cfile);
 885 }
 886
 887 int smb2_create_hardlink(const unsigned int xid,
 888                          struct cifs_tcon *tcon,
 889                          struct dentry *source_dentry,
 890                          const char *from_name, const char *to_name,
 891                          struct cifs_sb_info *cifs_sb)
 892 {
 893         __u32 co = file_create_options(source_dentry);
 894
 895         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 896                                   cifs_sb, co, FILE_READ_ATTRIBUTES,
 897                                   SMB2_OP_HARDLINK, NULL);
 898 }
 899
 900 int
 901 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 902                    const char *full_path, __u64 size,
 903                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 904 {
 905         struct cifsFileInfo *cfile;
 906         struct kvec in_iov;
 907         __le64 eof = cpu_to_le64(size);
 908
 909         in_iov.iov_base = &eof;
 910         in_iov.iov_len = sizeof(eof);
 911         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 912         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 913                                 FILE_WRITE_DATA, FILE_OPEN,
 914                                 0, ACL_NO_MODE, &in_iov,
 915                                 &(int){SMB2_OP_SET_EOF}, 1,
 916                                 cfile, NULL, NULL);
 917 }
 918
 919 int
 920 smb2_set_file_info(struct inode *inode, const char *full_path,
 921                    FILE_BASIC_INFO *buf, const unsigned int xid)
 922 {
 923         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 924         struct tcon_link *tlink;
 925         struct cifs_tcon *tcon;
 926         struct cifsFileInfo *cfile;
 927         struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
 928         int rc;
 929
 930         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 931             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 932             (buf->Attributes == 0))
 933                 return 0; /* would be a no op, no sense sending this */
 934
 935         tlink = cifs_sb_tlink(cifs_sb);
 936         if (IS_ERR(tlink))
 937                 return PTR_ERR(tlink);
 938         tcon = tlink_tcon(tlink);
 939
 940         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 941         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 942                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 943                               0, ACL_NO_MODE, &in_iov,
 944                               &(int){SMB2_OP_SET_INFO}, 1,
 945                               cfile, NULL, NULL);
 946         cifs_put_tlink(tlink);
 947         return rc;
 948 }
 949
 950 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
 951                                      struct super_block *sb,
 952                                      const unsigned int xid,
 953                                      struct cifs_tcon *tcon,
 954                                      const char *full_path,
 955                                      struct kvec *iov)
 956 {
 957         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 958         struct cifsFileInfo *cfile;
 959         struct inode *new = NULL;
 960         struct kvec in_iov[2];
 961         int cmds[2];
 962         int da, co, cd;
 963         int rc;
 964
 965         da = SYNCHRONIZE | DELETE |
 966                 FILE_READ_ATTRIBUTES |
 967                 FILE_WRITE_ATTRIBUTES;
 968         co = CREATE_NOT_DIR | OPEN_REPARSE_POINT;
 969         cd = FILE_CREATE;
 970         cmds[0] = SMB2_OP_SET_REPARSE;
 971         in_iov[0] = *iov;
 972         in_iov[1].iov_base = data;
 973         in_iov[1].iov_len = sizeof(*data);
 974
 975         if (tcon->posix_extensions) {
 976                 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
 977                 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 978                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 979                                       da, cd, co, ACL_NO_MODE, in_iov,
 980                                       cmds, 2, cfile, NULL, NULL);
 981                 if (!rc) {
 982                         rc = smb311_posix_get_inode_info(&new, full_path,
 983                                                          data, sb, xid);
 984                 }
 985         } else {
 986                 cmds[1] = SMB2_OP_QUERY_INFO;
 987                 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 988                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 989                                       da, cd, co, ACL_NO_MODE, in_iov,
 990                                       cmds, 2, cfile, NULL, NULL);
 991                 if (!rc) {
 992                         rc = cifs_get_inode_info(&new, full_path,
 993                                                  data, sb, xid, NULL);
 994                 }
 995         }
 996         return rc ? ERR_PTR(rc) : new;
 997 }
 998
 999 int smb2_query_reparse_point(const unsigned int xid,
1000                              struct cifs_tcon *tcon,
1001                              struct cifs_sb_info *cifs_sb,
1002                              const char *full_path,
1003                              u32 *tag, struct kvec *rsp,
1004                              int *rsp_buftype)
1005 {
1006         struct cifs_open_info_data data = {};
1007         struct cifsFileInfo *cfile;
1008         struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1009         int rc;
1010
1011         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1012
1013         cifs_get_readable_path(tcon, full_path, &cfile);
1014         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1015                               FILE_READ_ATTRIBUTES, FILE_OPEN,
1016                               OPEN_REPARSE_POINT, ACL_NO_MODE, &in_iov,
1017                               &(int){SMB2_OP_GET_REPARSE}, 1,
1018                               cfile, NULL, NULL);
1019         if (rc)
1020                 goto out;
1021
1022         *tag = data.reparse.tag;
1023         *rsp = data.reparse.io.iov;
1024         *rsp_buftype = data.reparse.io.buftype;
1025         memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1026         data.reparse.io.buftype = CIFS_NO_BUFFER;
1027 out:
1028         cifs_free_open_info(&data);
1029         return rc;
1030 }