fs/cifs/smb2inode.c

   1 /*
   2  *   fs/cifs/smb2inode.c
   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  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #include <linux/fs.h>
  24 #include <linux/stat.h>
  25 #include <linux/slab.h>
  26 #include <linux/pagemap.h>
  27 #include <asm/div64.h>
  28 #include "cifsfs.h"
  29 #include "cifspdu.h"
  30 #include "cifsglob.h"
  31 #include "cifsproto.h"
  32 #include "cifs_debug.h"
  33 #include "cifs_fs_sb.h"
  34 #include "cifs_unicode.h"
  35 #include "fscache.h"
  36 #include "smb2glob.h"
  37 #include "smb2pdu.h"
  38 #include "smb2proto.h"
  39
  40 static void
  41 free_set_inf_compound(struct smb_rqst *rqst)
  42 {
  43         if (rqst[1].rq_iov)
  44                 SMB2_set_info_free(&rqst[1]);
  45         if (rqst[2].rq_iov)
  46                 SMB2_close_free(&rqst[2]);
  47 }
  48
  49
  50 struct cop_vars {
  51         struct cifs_open_parms oparms;
  52         struct kvec rsp_iov[3];
  53         struct smb_rqst rqst[3];
  54         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  55         struct kvec qi_iov[1];
  56         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  57         struct kvec close_iov[1];
  58         struct smb2_file_rename_info rename_info;
  59         struct smb2_file_link_info link_info;
  60 };
  61
  62 static int
  63 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  64                  struct cifs_sb_info *cifs_sb, const char *full_path,
  65                  __u32 desired_access, __u32 create_disposition,
  66                  __u32 create_options, umode_t mode, void *ptr, int command,
  67                  struct cifsFileInfo *cfile)
  68 {
  69         struct cop_vars *vars = NULL;
  70         struct kvec *rsp_iov;
  71         struct smb_rqst *rqst;
  72         int rc;
  73         __le16 *utf16_path = NULL;
  74         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  75         struct cifs_fid fid;
  76         struct cifs_ses *ses = tcon->ses;
  77         struct TCP_Server_Info *server;
  78         int num_rqst = 0;
  79         int resp_buftype[3];
  80         struct smb2_query_info_rsp *qi_rsp = NULL;
  81         int flags = 0;
  82         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  83         unsigned int size[2];
  84         void *data[2];
  85         int len;
  86
  87         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  88         if (vars == NULL)
  89                 return -ENOMEM;
  90         rqst = &vars->rqst[0];
  91         rsp_iov = &vars->rsp_iov[0];
  92
  93         server = cifs_pick_channel(ses);
  94
  95         if (smb3_encryption_required(tcon))
  96                 flags |= CIFS_TRANSFORM_REQ;
  97
  98         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  99
 100         /* We already have a handle so we can skip the open */
 101         if (cfile)
 102                 goto after_open;
 103
 104         /* Open */
 105         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 106         if (!utf16_path) {
 107                 rc = -ENOMEM;
 108                 goto finished;
 109         }
 110
 111         vars->oparms.tcon = tcon;
 112         vars->oparms.desired_access = desired_access;
 113         vars->oparms.disposition = create_disposition;
 114         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 115         vars->oparms.fid = &fid;
 116         vars->oparms.reconnect = false;
 117         vars->oparms.mode = mode;
 118         vars->oparms.cifs_sb = cifs_sb;
 119
 120         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 121         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 122         rc = SMB2_open_init(tcon, server,
 123                             &rqst[num_rqst], &oplock, &vars->oparms,
 124                             utf16_path);
 125         kfree(utf16_path);
 126         if (rc)
 127                 goto finished;
 128
 129         smb2_set_next_command(tcon, &rqst[num_rqst]);
 130  after_open:
 131         num_rqst++;
 132         rc = 0;
 133
 134         /* Operation */
 135         switch (command) {
 136         case SMB2_OP_QUERY_INFO:
 137                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 138                 rqst[num_rqst].rq_nvec = 1;
 139
 140                 if (cfile)
 141                         rc = SMB2_query_info_init(tcon, server,
 142                                 &rqst[num_rqst],
 143                                 cfile->fid.persistent_fid,
 144                                 cfile->fid.volatile_fid,
 145                                 FILE_ALL_INFORMATION,
 146                                 SMB2_O_INFO_FILE, 0,
 147                                 sizeof(struct smb2_file_all_info) +
 148                                           PATH_MAX * 2, 0, NULL);
 149                 else {
 150                         rc = SMB2_query_info_init(tcon, server,
 151                                 &rqst[num_rqst],
 152                                 COMPOUND_FID,
 153                                 COMPOUND_FID,
 154                                 FILE_ALL_INFORMATION,
 155                                 SMB2_O_INFO_FILE, 0,
 156                                 sizeof(struct smb2_file_all_info) +
 157                                           PATH_MAX * 2, 0, NULL);
 158                         if (!rc) {
 159                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 160                                 smb2_set_related(&rqst[num_rqst]);
 161                         }
 162                 }
 163
 164                 if (rc)
 165                         goto finished;
 166                 num_rqst++;
 167                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 168                                                      full_path);
 169                 break;
 170         case SMB2_OP_POSIX_QUERY_INFO:
 171                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 172                 rqst[num_rqst].rq_nvec = 1;
 173
 174                 if (cfile)
 175                         rc = SMB2_query_info_init(tcon, server,
 176                                 &rqst[num_rqst],
 177                                 cfile->fid.persistent_fid,
 178                                 cfile->fid.volatile_fid,
 179                                 SMB_FIND_FILE_POSIX_INFO,
 180                                 SMB2_O_INFO_FILE, 0,
 181                                 /* TBD: fix following to allow for longer SIDs */
 182                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 183                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 184                 else {
 185                         rc = SMB2_query_info_init(tcon, server,
 186                                 &rqst[num_rqst],
 187                                 COMPOUND_FID,
 188                                 COMPOUND_FID,
 189                                 SMB_FIND_FILE_POSIX_INFO,
 190                                 SMB2_O_INFO_FILE, 0,
 191                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 192                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 193                         if (!rc) {
 194                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 195                                 smb2_set_related(&rqst[num_rqst]);
 196                         }
 197                 }
 198
 199                 if (rc)
 200                         goto finished;
 201                 num_rqst++;
 202                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 203                 break;
 204         case SMB2_OP_DELETE:
 205                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 206                 break;
 207         case SMB2_OP_MKDIR:
 208                 /*
 209                  * Directories are created through parameters in the
 210                  * SMB2_open() call.
 211                  */
 212                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 213                 break;
 214         case SMB2_OP_RMDIR:
 215                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 216                 rqst[num_rqst].rq_nvec = 1;
 217
 218                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 219                 data[0] = &delete_pending[0];
 220
 221                 rc = SMB2_set_info_init(tcon, server,
 222                                         &rqst[num_rqst], COMPOUND_FID,
 223                                         COMPOUND_FID, current->tgid,
 224                                         FILE_DISPOSITION_INFORMATION,
 225                                         SMB2_O_INFO_FILE, 0, data, size);
 226                 if (rc)
 227                         goto finished;
 228                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 229                 smb2_set_related(&rqst[num_rqst++]);
 230                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 231                 break;
 232         case SMB2_OP_SET_EOF:
 233                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 234                 rqst[num_rqst].rq_nvec = 1;
 235
 236                 size[0] = 8; /* sizeof __le64 */
 237                 data[0] = ptr;
 238
 239                 rc = SMB2_set_info_init(tcon, server,
 240                                         &rqst[num_rqst], COMPOUND_FID,
 241                                         COMPOUND_FID, current->tgid,
 242                                         FILE_END_OF_FILE_INFORMATION,
 243                                         SMB2_O_INFO_FILE, 0, data, size);
 244                 if (rc)
 245                         goto finished;
 246                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 247                 smb2_set_related(&rqst[num_rqst++]);
 248                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 249                 break;
 250         case SMB2_OP_SET_INFO:
 251                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 252                 rqst[num_rqst].rq_nvec = 1;
 253
 254
 255                 size[0] = sizeof(FILE_BASIC_INFO);
 256                 data[0] = ptr;
 257
 258                 if (cfile)
 259                         rc = SMB2_set_info_init(tcon, server,
 260                                 &rqst[num_rqst],
 261                                 cfile->fid.persistent_fid,
 262                                 cfile->fid.volatile_fid, current->tgid,
 263                                 FILE_BASIC_INFORMATION,
 264                                 SMB2_O_INFO_FILE, 0, data, size);
 265                 else {
 266                         rc = SMB2_set_info_init(tcon, server,
 267                                 &rqst[num_rqst],
 268                                 COMPOUND_FID,
 269                                 COMPOUND_FID, current->tgid,
 270                                 FILE_BASIC_INFORMATION,
 271                                 SMB2_O_INFO_FILE, 0, data, size);
 272                         if (!rc) {
 273                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 274                                 smb2_set_related(&rqst[num_rqst]);
 275                         }
 276                 }
 277
 278                 if (rc)
 279                         goto finished;
 280                 num_rqst++;
 281                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 282                                                    full_path);
 283                 break;
 284         case SMB2_OP_RENAME:
 285                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 286                 rqst[num_rqst].rq_nvec = 2;
 287
 288                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 289
 290                 vars->rename_info.ReplaceIfExists = 1;
 291                 vars->rename_info.RootDirectory = 0;
 292                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 293
 294                 size[0] = sizeof(struct smb2_file_rename_info);
 295                 data[0] = &vars->rename_info;
 296
 297                 size[1] = len + 2 /* null */;
 298                 data[1] = (__le16 *)ptr;
 299
 300                 if (cfile)
 301                         rc = SMB2_set_info_init(tcon, server,
 302                                                 &rqst[num_rqst],
 303                                                 cfile->fid.persistent_fid,
 304                                                 cfile->fid.volatile_fid,
 305                                         current->tgid, FILE_RENAME_INFORMATION,
 306                                         SMB2_O_INFO_FILE, 0, data, size);
 307                 else {
 308                         rc = SMB2_set_info_init(tcon, server,
 309                                         &rqst[num_rqst],
 310                                         COMPOUND_FID, COMPOUND_FID,
 311                                         current->tgid, FILE_RENAME_INFORMATION,
 312                                         SMB2_O_INFO_FILE, 0, data, size);
 313                         if (!rc) {
 314                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 315                                 smb2_set_related(&rqst[num_rqst]);
 316                         }
 317                 }
 318                 if (rc)
 319                         goto finished;
 320                 num_rqst++;
 321                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 322                 break;
 323         case SMB2_OP_HARDLINK:
 324                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 325                 rqst[num_rqst].rq_nvec = 2;
 326
 327                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 328
 329                 vars->link_info.ReplaceIfExists = 0;
 330                 vars->link_info.RootDirectory = 0;
 331                 vars->link_info.FileNameLength = cpu_to_le32(len);
 332
 333                 size[0] = sizeof(struct smb2_file_link_info);
 334                 data[0] = &vars->link_info;
 335
 336                 size[1] = len + 2 /* null */;
 337                 data[1] = (__le16 *)ptr;
 338
 339                 rc = SMB2_set_info_init(tcon, server,
 340                                         &rqst[num_rqst], COMPOUND_FID,
 341                                         COMPOUND_FID, current->tgid,
 342                                         FILE_LINK_INFORMATION,
 343                                         SMB2_O_INFO_FILE, 0, data, size);
 344                 if (rc)
 345                         goto finished;
 346                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 347                 smb2_set_related(&rqst[num_rqst++]);
 348                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 349                 break;
 350         default:
 351                 cifs_dbg(VFS, "Invalid command\n");
 352                 rc = -EINVAL;
 353         }
 354         if (rc)
 355                 goto finished;
 356
 357         /* We already have a handle so we can skip the close */
 358         if (cfile)
 359                 goto after_close;
 360         /* Close */
 361         flags |= CIFS_CP_CREATE_CLOSE_OP;
 362         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 363         rqst[num_rqst].rq_nvec = 1;
 364         rc = SMB2_close_init(tcon, server,
 365                              &rqst[num_rqst], COMPOUND_FID,
 366                              COMPOUND_FID, false);
 367         smb2_set_related(&rqst[num_rqst]);
 368         if (rc)
 369                 goto finished;
 370  after_close:
 371         num_rqst++;
 372
 373         if (cfile) {
 374                 cifsFileInfo_put(cfile);
 375                 cfile = NULL;
 376                 rc = compound_send_recv(xid, ses, server,
 377                                         flags, num_rqst - 2,
 378                                         &rqst[1], &resp_buftype[1],
 379                                         &rsp_iov[1]);
 380         } else
 381                 rc = compound_send_recv(xid, ses, server,
 382                                         flags, num_rqst,
 383                                         rqst, resp_buftype,
 384                                         rsp_iov);
 385
 386  finished:
 387         if (cfile)
 388                 cifsFileInfo_put(cfile);
 389
 390         SMB2_open_free(&rqst[0]);
 391         if (rc == -EREMCHG) {
 392                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 393                 tcon->need_reconnect = true;
 394         }
 395
 396         switch (command) {
 397         case SMB2_OP_QUERY_INFO:
 398                 if (rc == 0) {
 399                         qi_rsp = (struct smb2_query_info_rsp *)
 400                                 rsp_iov[1].iov_base;
 401                         rc = smb2_validate_and_copy_iov(
 402                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 403                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 404                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 405                                 ptr);
 406                 }
 407                 if (rqst[1].rq_iov)
 408                         SMB2_query_info_free(&rqst[1]);
 409                 if (rqst[2].rq_iov)
 410                         SMB2_close_free(&rqst[2]);
 411                 if (rc)
 412                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 413                                                 tcon->tid, rc);
 414                 else
 415                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 416                                                 tcon->tid);
 417                 break;
 418         case SMB2_OP_POSIX_QUERY_INFO:
 419                 if (rc == 0) {
 420                         qi_rsp = (struct smb2_query_info_rsp *)
 421                                 rsp_iov[1].iov_base;
 422                         rc = smb2_validate_and_copy_iov(
 423                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 424                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 425                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 426                 }
 427                 if (rqst[1].rq_iov)
 428                         SMB2_query_info_free(&rqst[1]);
 429                 if (rqst[2].rq_iov)
 430                         SMB2_close_free(&rqst[2]);
 431                 if (rc)
 432                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 433                 else
 434                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 435                 break;
 436         case SMB2_OP_DELETE:
 437                 if (rc)
 438                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 439                 else
 440                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 441                 if (rqst[1].rq_iov)
 442                         SMB2_close_free(&rqst[1]);
 443                 break;
 444         case SMB2_OP_MKDIR:
 445                 if (rc)
 446                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 447                 else
 448                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 449                 if (rqst[1].rq_iov)
 450                         SMB2_close_free(&rqst[1]);
 451                 break;
 452         case SMB2_OP_HARDLINK:
 453                 if (rc)
 454                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 455                 else
 456                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 457                 free_set_inf_compound(rqst);
 458                 break;
 459         case SMB2_OP_RENAME:
 460                 if (rc)
 461                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 462                 else
 463                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 464                 free_set_inf_compound(rqst);
 465                 break;
 466         case SMB2_OP_RMDIR:
 467                 if (rc)
 468                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 469                 else
 470                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 471                 free_set_inf_compound(rqst);
 472                 break;
 473         case SMB2_OP_SET_EOF:
 474                 if (rc)
 475                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 476                 else
 477                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 478                 free_set_inf_compound(rqst);
 479                 break;
 480         case SMB2_OP_SET_INFO:
 481                 if (rc)
 482                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 483                                                 tcon->tid, rc);
 484                 else
 485                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 486                                                 tcon->tid);
 487                 free_set_inf_compound(rqst);
 488                 break;
 489         }
 490         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 491         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 492         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 493         kfree(vars);
 494         return rc;
 495 }
 496
 497 void
 498 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 499 {
 500         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 501         dst->CurrentByteOffset = src->CurrentByteOffset;
 502         dst->Mode = src->Mode;
 503         dst->AlignmentRequirement = src->AlignmentRequirement;
 504         dst->IndexNumber1 = 0; /* we don't use it */
 505 }
 506
 507 int
 508 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 509                      struct cifs_sb_info *cifs_sb, const char *full_path,
 510                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 511 {
 512         int rc;
 513         struct smb2_file_all_info *smb2_data;
 514         __u32 create_options = 0;
 515         bool no_cached_open = tcon->nohandlecache;
 516         struct cifsFileInfo *cfile;
 517         struct cached_fid *cfid = NULL;
 518
 519         *adjust_tz = false;
 520         *reparse = false;
 521
 522         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 523                             GFP_KERNEL);
 524         if (smb2_data == NULL)
 525                 return -ENOMEM;
 526
 527         /* If it is a root and its handle is cached then use it */
 528         if (!strlen(full_path) && !no_cached_open) {
 529                 rc = open_shroot(xid, tcon, cifs_sb, &cfid);
 530                 if (rc)
 531                         goto out;
 532
 533                 if (tcon->crfid.file_all_info_is_valid) {
 534                         move_smb2_info_to_cifs(data,
 535                                                &tcon->crfid.file_all_info);
 536                 } else {
 537                         rc = SMB2_query_info(xid, tcon,
 538                                              cfid->fid->persistent_fid,
 539                                              cfid->fid->volatile_fid, smb2_data);
 540                         if (!rc)
 541                                 move_smb2_info_to_cifs(data, smb2_data);
 542                 }
 543                 close_shroot(cfid);
 544                 goto out;
 545         }
 546
 547         cifs_get_readable_path(tcon, full_path, &cfile);
 548         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 549                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 550                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 551         if (rc == -EOPNOTSUPP) {
 552                 *reparse = true;
 553                 create_options |= OPEN_REPARSE_POINT;
 554
 555                 /* Failed on a symbolic link - query a reparse point info */
 556                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 557                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 558                                       create_options, ACL_NO_MODE,
 559                                       smb2_data, SMB2_OP_QUERY_INFO, NULL);
 560         }
 561         if (rc)
 562                 goto out;
 563
 564         move_smb2_info_to_cifs(data, smb2_data);
 565 out:
 566         kfree(smb2_data);
 567         return rc;
 568 }
 569
 570
 571 int
 572 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 573                      struct cifs_sb_info *cifs_sb, const char *full_path,
 574                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 575 {
 576         int rc;
 577         __u32 create_options = 0;
 578         struct cifsFileInfo *cfile;
 579         struct smb311_posix_qinfo *smb2_data;
 580
 581         *adjust_tz = false;
 582         *reparse = false;
 583
 584         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 585         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 586                             GFP_KERNEL);
 587         if (smb2_data == NULL)
 588                 return -ENOMEM;
 589
 590         /*
 591          * BB TODO: Add support for using the cached root handle.
 592          * Create SMB2_query_posix_info worker function to do non-compounded query
 593          * when we already have an open file handle for this. For now this is fast enough
 594          * (always using the compounded version).
 595          */
 596
 597         cifs_get_readable_path(tcon, full_path, &cfile);
 598         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 599                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 600                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 601         if (rc == -EOPNOTSUPP) {
 602                 /* BB TODO: When support for special files added to Samba re-verify this path */
 603                 *reparse = true;
 604                 create_options |= OPEN_REPARSE_POINT;
 605
 606                 /* Failed on a symbolic link - query a reparse point info */
 607                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 608                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 609                                       create_options, ACL_NO_MODE,
 610                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, NULL);
 611         }
 612         if (rc)
 613                 goto out;
 614
 615          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 616         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 617
 618 out:
 619         kfree(smb2_data);
 620         return rc;
 621 }
 622
 623 int
 624 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 625            struct cifs_tcon *tcon, const char *name,
 626            struct cifs_sb_info *cifs_sb)
 627 {
 628         return smb2_compound_op(xid, tcon, cifs_sb, name,
 629                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 630                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 631                                 NULL);
 632 }
 633
 634 void
 635 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 636                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 637                    const unsigned int xid)
 638 {
 639         FILE_BASIC_INFO data;
 640         struct cifsInodeInfo *cifs_i;
 641         struct cifsFileInfo *cfile;
 642         u32 dosattrs;
 643         int tmprc;
 644
 645         memset(&data, 0, sizeof(data));
 646         cifs_i = CIFS_I(inode);
 647         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 648         data.Attributes = cpu_to_le32(dosattrs);
 649         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 650         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 651                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 652                                  CREATE_NOT_FILE, ACL_NO_MODE,
 653                                  &data, SMB2_OP_SET_INFO, cfile);
 654         if (tmprc == 0)
 655                 cifs_i->cifsAttrs = dosattrs;
 656 }
 657
 658 int
 659 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 660            struct cifs_sb_info *cifs_sb)
 661 {
 662         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 663                                 CREATE_NOT_FILE, ACL_NO_MODE,
 664                                 NULL, SMB2_OP_RMDIR, NULL);
 665 }
 666
 667 int
 668 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 669             struct cifs_sb_info *cifs_sb)
 670 {
 671         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 672                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 673                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 674 }
 675
 676 static int
 677 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 678                    const char *from_name, const char *to_name,
 679                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 680                    struct cifsFileInfo *cfile)
 681 {
 682         __le16 *smb2_to_name = NULL;
 683         int rc;
 684
 685         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 686         if (smb2_to_name == NULL) {
 687                 rc = -ENOMEM;
 688                 goto smb2_rename_path;
 689         }
 690         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 691                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 692                               command, cfile);
 693 smb2_rename_path:
 694         kfree(smb2_to_name);
 695         return rc;
 696 }
 697
 698 int
 699 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 700                  const char *from_name, const char *to_name,
 701                  struct cifs_sb_info *cifs_sb)
 702 {
 703         struct cifsFileInfo *cfile;
 704
 705         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 706
 707         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 708                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 709 }
 710
 711 int
 712 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 713                      const char *from_name, const char *to_name,
 714                      struct cifs_sb_info *cifs_sb)
 715 {
 716         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 717                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 718                                   NULL);
 719 }
 720
 721 int
 722 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 723                    const char *full_path, __u64 size,
 724                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 725 {
 726         __le64 eof = cpu_to_le64(size);
 727
 728         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 729                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 730                                 &eof, SMB2_OP_SET_EOF, NULL);
 731 }
 732
 733 int
 734 smb2_set_file_info(struct inode *inode, const char *full_path,
 735                    FILE_BASIC_INFO *buf, const unsigned int xid)
 736 {
 737         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 738         struct tcon_link *tlink;
 739         int rc;
 740
 741         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 742             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 743             (buf->Attributes == 0))
 744                 return 0; /* would be a no op, no sense sending this */
 745
 746         tlink = cifs_sb_tlink(cifs_sb);
 747         if (IS_ERR(tlink))
 748                 return PTR_ERR(tlink);
 749
 750         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 751                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 752                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
 753         cifs_put_tlink(tlink);
 754         return rc;
 755 }