source3/modules/vfs_snapper.c

   1 /*
   2  * Module for snapshot IO using snapper
   3  *
   4  * Copyright (C) David Disseldorp 2012-2014
   5  *
   6  * Portions taken from vfs_shadow_copy2.c:
   7  * Copyright (C) Andrew Tridgell   2007
   8  * Copyright (C) Ed Plese          2009
   9  * Copyright (C) Volker Lendecke   2011
  10  * Copyright (C) Christian Ambach  2011
  11  * Copyright (C) Michael Adam      2013
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 3 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 #include <dbus/dbus.h>
  28 #ifdef HAVE_LINUX_IOCTL_H
  29 #include <linux/ioctl.h>
  30 #endif
  31 #include <sys/ioctl.h>
  32 #include <dirent.h>
  33 #include <libgen.h>
  34 #include "includes.h"
  35 #include "include/ntioctl.h"
  36 #include "include/smb.h"
  37 #include "system/filesys.h"
  38 #include "smbd/smbd.h"
  39 #include "lib/util/tevent_ntstatus.h"
  40
  41 #define SNAPPER_SIG_LIST_SNAPS_RSP "a(uquxussa{ss})"
  42 #define SNAPPER_SIG_LIST_CONFS_RSP "a(ssa{ss})"
  43 #define SNAPPER_SIG_CREATE_SNAP_RSP "u"
  44 #define SNAPPER_SIG_DEL_SNAPS_RSP ""
  45 #define SNAPPER_SIG_STRING_DICT "{ss}"
  46
  47 struct snapper_dict {
  48         char *key;
  49         char *val;
  50 };
  51
  52 struct snapper_snap {
  53         uint32_t id;
  54         uint16_t type;
  55         uint32_t pre_id;
  56         int64_t time;
  57         uint32_t creator_uid;
  58         char *desc;
  59         char *cleanup;
  60         uint32_t num_user_data;
  61         struct snapper_dict *user_data;
  62 };
  63
  64 struct snapper_conf {
  65         char *name;
  66         char *mnt;
  67         uint32_t num_attrs;
  68         struct snapper_dict *attrs;
  69 };
  70
  71 static const struct {
  72         const char *snapper_err_str;
  73         NTSTATUS status;
  74 } snapper_err_map[] = {
  75         { "error.no_permissions", NT_STATUS_ACCESS_DENIED },
  76 };
  77
  78 static NTSTATUS snapper_err_ntstatus_map(const char *snapper_err_str)
  79 {
  80         int i;
  81
  82         if (snapper_err_str == NULL) {
  83                 return NT_STATUS_UNSUCCESSFUL;
  84         }
  85         for (i = 0; i < ARRAY_SIZE(snapper_err_map); i++) {
  86                 if (!strcmp(snapper_err_map[i].snapper_err_str,
  87                             snapper_err_str)) {
  88                         return snapper_err_map[i].status;
  89                 }
  90         }
  91         DEBUG(2, ("no explicit mapping for dbus error: %s\n", snapper_err_str));
  92
  93         return NT_STATUS_UNSUCCESSFUL;
  94 }
  95
  96 /*
  97  * Strings are UTF-8. Other characters must be encoded hexadecimal as "\x??".
  98  * As a consequence "\" must be encoded as "\\".
  99  */
 100 static NTSTATUS snapper_dbus_str_encode(TALLOC_CTX *mem_ctx, const char *in_str,
 101                                         char **_out_str)
 102 {
 103         size_t in_len;
 104         char *out_str;
 105         int i;
 106         int out_off;
 107         int out_len;
 108
 109         if (in_str == NULL) {
 110                 return NT_STATUS_INVALID_PARAMETER;
 111         }
 112
 113         in_len = strlen(in_str);
 114
 115         /* output can be max 4 times the length of @in_str, +1 for terminator */
 116         out_len = (in_len * 4) + 1;
 117
 118         out_str = talloc_array(mem_ctx, char, out_len);
 119         if (out_str == NULL) {
 120                 return NT_STATUS_NO_MEMORY;
 121         }
 122
 123         out_off = 0;
 124         for (i = 0; i < in_len; i++) {
 125                 size_t pushed;
 126
 127                 if (in_str[i] == '\\') {
 128                         pushed = snprintf(out_str + out_off, out_len - out_off,
 129                                           "\\\\");
 130                 } else if ((unsigned char)in_str[i] > 127) {
 131                         pushed = snprintf(out_str + out_off, out_len - out_off,
 132                                           "\\x%02x", (unsigned char)in_str[i]);
 133                 } else {
 134                         /* regular character */
 135                         *(out_str + out_off) = in_str[i];
 136                         pushed = sizeof(char);
 137                 }
 138                 if (pushed >= out_len - out_off) {
 139                         /* truncated, should never happen */
 140                         talloc_free(out_str);
 141                         return NT_STATUS_INTERNAL_ERROR;
 142                 }
 143                 out_off += pushed;
 144         }
 145
 146         *(out_str + out_off) = '\0';
 147         *_out_str = out_str;
 148
 149         return NT_STATUS_OK;
 150 }
 151
 152 static NTSTATUS snapper_dbus_str_decode(TALLOC_CTX *mem_ctx, const char *in_str,
 153                                         char **_out_str)
 154 {
 155         size_t in_len;
 156         char *out_str;
 157         int i;
 158         int out_off;
 159         int out_len;
 160
 161         if (in_str == NULL) {
 162                 return NT_STATUS_INVALID_PARAMETER;
 163         }
 164
 165         in_len = strlen(in_str);
 166
 167         /* output cannot be larger than input, +1 for terminator */
 168         out_len = in_len + 1;
 169
 170         out_str = talloc_array(mem_ctx, char, out_len);
 171         if (out_str == NULL) {
 172                 return NT_STATUS_NO_MEMORY;
 173         }
 174
 175         out_off = 0;
 176         for (i = 0; i < in_len; i++) {
 177                 int j;
 178                 char hex_buf[3];
 179                 unsigned int non_ascii_byte;
 180
 181                 if (in_str[i] != '\\') {
 182                         out_str[out_off] = in_str[i];
 183                         out_off++;
 184                         continue;
 185                 }
 186
 187                 i++;
 188                 if (in_str[i] == '\\') {
 189                         out_str[out_off] = '\\';
 190                         out_off++;
 191                         continue;
 192                 } else if (in_str[i] != 'x') {
 193                         goto err_invalid_src_encoding;
 194                 }
 195
 196                 /* non-ASCII, encoded as two hex chars */
 197                 for (j = 0; j < 2; j++) {
 198                         i++;
 199                         if ((in_str[i] == '\0') || !isxdigit(in_str[i])) {
 200                                 goto err_invalid_src_encoding;
 201                         }
 202                         hex_buf[j] = in_str[i];
 203                 }
 204                 hex_buf[2] = '\0';
 205
 206                 sscanf(hex_buf, "%x", &non_ascii_byte);
 207                 out_str[out_off] = (unsigned char)non_ascii_byte;
 208                 out_off++;
 209         }
 210
 211         out_str[out_off] = '\0';
 212         *_out_str = out_str;
 213
 214         return NT_STATUS_OK;
 215 err_invalid_src_encoding:
 216         DEBUG(0, ("invalid encoding %s\n", in_str));
 217         return NT_STATUS_INVALID_PARAMETER;
 218 }
 219
 220 static DBusConnection *snapper_dbus_conn_create(void)
 221 {
 222         DBusError err;
 223         DBusConnection *dconn;
 224
 225         dbus_error_init(&err);
 226
 227         /*
 228          * Always create a new DBus connection, to ensure snapperd detects the
 229          * correct client [E]UID. With dbus_bus_get() it does not!
 230          */
 231         dconn = dbus_bus_get_private(DBUS_BUS_SYSTEM, &err);
 232         if (dbus_error_is_set(&err)) {
 233                 DEBUG(0, ("dbus connection error: %s\n", err.message));
 234                 dbus_error_free(&err);
 235         }
 236         if (dconn == NULL) {
 237                 return NULL;
 238         }
 239
 240         /* dbus_bus_get_private() sets exit-on-disconnect by default, undo it */
 241         dbus_connection_set_exit_on_disconnect(dconn, false);
 242
 243         return dconn;
 244 }
 245
 246 static void snapper_dbus_conn_destroy(DBusConnection *dconn)
 247 {
 248         if (dconn == NULL) {
 249                 DEBUG(2, ("attempt to destroy NULL dbus connection\n"));
 250                 return;
 251         }
 252
 253         dbus_connection_close(dconn);
 254         dbus_connection_unref(dconn);
 255 }
 256
 257 /*
 258  * send the message @send_msg over the dbus and wait for a response, return the
 259  * responsee via @recv_msg_out.
 260  * @send_msg is not freed, dbus_message_unref() must be handled by the caller.
 261  */
 262 static NTSTATUS snapper_dbus_msg_xchng(DBusConnection *dconn,
 263                                        DBusMessage *send_msg,
 264                                        DBusMessage **recv_msg_out)
 265 {
 266         DBusPendingCall *pending;
 267         DBusMessage *recv_msg;
 268
 269         /* send message and get a handle for a reply */
 270         if (!dbus_connection_send_with_reply(dconn, send_msg, &pending, -1)) {
 271                 return NT_STATUS_NO_MEMORY;
 272         }
 273         if (NULL == pending) {
 274                 DEBUG(0, ("dbus msg send failed\n"));
 275                 return NT_STATUS_UNSUCCESSFUL;
 276         }
 277
 278         dbus_connection_flush(dconn);
 279
 280         /* block until we receive a reply */
 281         dbus_pending_call_block(pending);
 282
 283         /* get the reply message */
 284         recv_msg = dbus_pending_call_steal_reply(pending);
 285         if (recv_msg == NULL) {
 286                 DEBUG(0, ("Reply Null\n"));
 287                 return NT_STATUS_UNSUCCESSFUL;
 288         }
 289         /* free the pending message handle */
 290         dbus_pending_call_unref(pending);
 291         *recv_msg_out = recv_msg;
 292
 293         return NT_STATUS_OK;
 294 }
 295
 296 static NTSTATUS snapper_type_check(DBusMessageIter *iter,
 297                                    int expected_type)
 298 {
 299         int type = dbus_message_iter_get_arg_type(iter);
 300         if (type != expected_type) {
 301                 DEBUG(0, ("got type %d, expecting %d\n",
 302                         type, expected_type));
 303                 return NT_STATUS_INVALID_PARAMETER;
 304         }
 305
 306         return NT_STATUS_OK;
 307 }
 308
 309 static NTSTATUS snapper_type_check_get(DBusMessageIter *iter,
 310                                        int expected_type,
 311                                        void *val)
 312 {
 313         NTSTATUS status;
 314         status = snapper_type_check(iter, expected_type);
 315         if (!NT_STATUS_IS_OK(status)) {
 316                 return status;
 317         }
 318
 319         dbus_message_iter_get_basic(iter, val);
 320
 321         return NT_STATUS_OK;
 322 }
 323
 324 static NTSTATUS snapper_dict_unpack(TALLOC_CTX *mem_ctx,
 325                                     DBusMessageIter *iter,
 326                                     struct snapper_dict *dict_out)
 327
 328 {
 329         NTSTATUS status;
 330         DBusMessageIter dct_iter;
 331         char *key_encoded;
 332         char *val_encoded;
 333
 334         status = snapper_type_check(iter, DBUS_TYPE_DICT_ENTRY);
 335         if (!NT_STATUS_IS_OK(status)) {
 336                 return status;
 337         }
 338         dbus_message_iter_recurse(iter, &dct_iter);
 339
 340         status = snapper_type_check_get(&dct_iter, DBUS_TYPE_STRING,
 341                                         &key_encoded);
 342         if (!NT_STATUS_IS_OK(status)) {
 343                 return status;
 344         }
 345         status = snapper_dbus_str_decode(mem_ctx, key_encoded, &dict_out->key);
 346         if (!NT_STATUS_IS_OK(status)) {
 347                 return status;
 348         }
 349
 350         dbus_message_iter_next(&dct_iter);
 351         status = snapper_type_check_get(&dct_iter, DBUS_TYPE_STRING,
 352                                         &val_encoded);
 353         if (!NT_STATUS_IS_OK(status)) {
 354                 talloc_free(dict_out->key);
 355                 return status;
 356         }
 357         status = snapper_dbus_str_decode(mem_ctx, val_encoded, &dict_out->val);
 358         if (!NT_STATUS_IS_OK(status)) {
 359                 talloc_free(dict_out->key);
 360                 return status;
 361         }
 362
 363         return NT_STATUS_OK;
 364 }
 365
 366 static void snapper_dict_array_print(uint32_t num_dicts,
 367                                      struct snapper_dict *dicts)
 368 {
 369         int i;
 370
 371         for (i = 0; i < num_dicts; i++) {
 372                 DEBUG(10, ("dict (key: %s, val: %s)\n",
 373                            dicts[i].key, dicts[i].val));
 374         }
 375 }
 376
 377 static NTSTATUS snapper_dict_array_unpack(TALLOC_CTX *mem_ctx,
 378                                           DBusMessageIter *iter,
 379                                           uint32_t *num_dicts_out,
 380                                           struct snapper_dict **dicts_out)
 381 {
 382         NTSTATUS status;
 383         DBusMessageIter array_iter;
 384         uint32_t num_dicts;
 385         struct snapper_dict *dicts = NULL;
 386
 387         status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
 388         if (!NT_STATUS_IS_OK(status)) {
 389                 return status;
 390         }
 391         dbus_message_iter_recurse(iter, &array_iter);
 392
 393         num_dicts = 0;
 394         while (dbus_message_iter_get_arg_type(&array_iter)
 395                                                         != DBUS_TYPE_INVALID) {
 396                 num_dicts++;
 397                 dicts = talloc_realloc(mem_ctx, dicts, struct snapper_dict,
 398                                        num_dicts);
 399                 if (dicts == NULL)
 400                         abort();
 401
 402                 status = snapper_dict_unpack(mem_ctx, &array_iter,
 403                                              &dicts[num_dicts - 1]);
 404                 if (!NT_STATUS_IS_OK(status)) {
 405                         talloc_free(dicts);
 406                         return status;
 407                 }
 408                 dbus_message_iter_next(&array_iter);
 409         }
 410
 411         *num_dicts_out = num_dicts;
 412         *dicts_out = dicts;
 413
 414         return NT_STATUS_OK;
 415 }
 416
 417 static NTSTATUS snapper_list_confs_pack(DBusMessage **req_msg_out)
 418 {
 419         DBusMessage *msg;
 420
 421         msg = dbus_message_new_method_call("org.opensuse.Snapper",
 422                                            "/org/opensuse/Snapper",
 423                                            "org.opensuse.Snapper",
 424                                            "ListConfigs");
 425         if (msg == NULL) {
 426                 DEBUG(0, ("null msg\n"));
 427                 return NT_STATUS_NO_MEMORY;
 428         }
 429
 430         /* no arguments to append */
 431         *req_msg_out = msg;
 432
 433         return NT_STATUS_OK;
 434 }
 435
 436 static NTSTATUS snapper_conf_unpack(TALLOC_CTX *mem_ctx,
 437                                     DBusMessageIter *iter,
 438                                     struct snapper_conf *conf_out)
 439 {
 440         NTSTATUS status;
 441         DBusMessageIter st_iter;
 442         char *name_encoded;
 443         char *mnt_encoded;
 444
 445         status = snapper_type_check(iter, DBUS_TYPE_STRUCT);
 446         if (!NT_STATUS_IS_OK(status)) {
 447                 return status;
 448         }
 449         dbus_message_iter_recurse(iter, &st_iter);
 450
 451         status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
 452                                         &name_encoded);
 453         if (!NT_STATUS_IS_OK(status)) {
 454                 return status;
 455         }
 456
 457         status = snapper_dbus_str_decode(mem_ctx, name_encoded,
 458                                          &conf_out->name);
 459         if (!NT_STATUS_IS_OK(status)) {
 460                 return status;
 461         }
 462
 463         dbus_message_iter_next(&st_iter);
 464         status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
 465                                         &mnt_encoded);
 466         if (!NT_STATUS_IS_OK(status)) {
 467                 talloc_free(conf_out->name);
 468                 return status;
 469         }
 470
 471         status = snapper_dbus_str_decode(mem_ctx, mnt_encoded,
 472                                          &conf_out->mnt);
 473         if (!NT_STATUS_IS_OK(status)) {
 474                 talloc_free(conf_out->name);
 475                 return status;
 476         }
 477
 478         dbus_message_iter_next(&st_iter);
 479         status = snapper_dict_array_unpack(mem_ctx, &st_iter,
 480                                            &conf_out->num_attrs,
 481                                            &conf_out->attrs);
 482         if (!NT_STATUS_IS_OK(status)) {
 483                 talloc_free(conf_out->mnt);
 484                 talloc_free(conf_out->name);
 485                 return status;
 486         }
 487
 488         return NT_STATUS_OK;
 489 }
 490
 491 static struct snapper_conf *snapper_conf_array_base_find(int32_t num_confs,
 492                                                 struct snapper_conf *confs,
 493                                                          const char *base)
 494 {
 495         int i;
 496
 497         for (i = 0; i < num_confs; i++) {
 498                 if (strcmp(confs[i].mnt, base) == 0) {
 499                         DEBUG(5, ("found snapper conf %s for path %s\n",
 500                                   confs[i].name, base));
 501                         return &confs[i];
 502                 }
 503         }
 504         DEBUG(5, ("config for base %s not found\n", base));
 505
 506         return NULL;
 507 }
 508
 509 static void snapper_conf_array_print(int32_t num_confs,
 510                                      struct snapper_conf *confs)
 511 {
 512         int i;
 513
 514         for (i = 0; i < num_confs; i++) {
 515                 DEBUG(10, ("name: %s, mnt: %s\n",
 516                            confs[i].name, confs[i].mnt));
 517                 snapper_dict_array_print(confs[i].num_attrs, confs[i].attrs);
 518         }
 519 }
 520
 521 static NTSTATUS snapper_conf_array_unpack(TALLOC_CTX *mem_ctx,
 522                                           DBusMessageIter *iter,
 523                                           uint32_t *num_confs_out,
 524                                           struct snapper_conf **confs_out)
 525 {
 526         uint32_t num_confs;
 527         NTSTATUS status;
 528         struct snapper_conf *confs = NULL;
 529         DBusMessageIter array_iter;
 530
 531
 532         status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
 533         if (!NT_STATUS_IS_OK(status)) {
 534                 return status;
 535         }
 536         dbus_message_iter_recurse(iter, &array_iter);
 537
 538         num_confs = 0;
 539         while (dbus_message_iter_get_arg_type(&array_iter)
 540                                                         != DBUS_TYPE_INVALID) {
 541                 num_confs++;
 542                 confs = talloc_realloc(mem_ctx, confs, struct snapper_conf,
 543                                        num_confs);
 544                 if (confs == NULL)
 545                         abort();
 546
 547                 status = snapper_conf_unpack(confs, &array_iter,
 548                                              &confs[num_confs - 1]);
 549                 if (!NT_STATUS_IS_OK(status)) {
 550                         talloc_free(confs);
 551                         return status;
 552                 }
 553                 dbus_message_iter_next(&array_iter);
 554         }
 555
 556         *num_confs_out = num_confs;
 557         *confs_out = confs;
 558
 559         return NT_STATUS_OK;
 560 }
 561
 562 static NTSTATUS snapper_list_confs_unpack(TALLOC_CTX *mem_ctx,
 563                                           DBusConnection *dconn,
 564                                           DBusMessage *rsp_msg,
 565                                           uint32_t *num_confs_out,
 566                                           struct snapper_conf **confs_out)
 567 {
 568         NTSTATUS status;
 569         DBusMessageIter iter;
 570         int msg_type;
 571         uint32_t num_confs;
 572         struct snapper_conf *confs;
 573         const char *sig;
 574
 575         msg_type = dbus_message_get_type(rsp_msg);
 576         if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
 577                 const char *err_str = dbus_message_get_error_name(rsp_msg);
 578                 DEBUG(0, ("list_confs error response: %s\n", err_str));
 579                 return snapper_err_ntstatus_map(err_str);
 580         }
 581
 582         if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
 583                 DEBUG(0, ("unexpected list_confs ret type: %d\n",
 584                           msg_type));
 585                 return NT_STATUS_INVALID_PARAMETER;
 586         }
 587
 588         sig = dbus_message_get_signature(rsp_msg);
 589         if ((sig == NULL)
 590          || (strcmp(sig, SNAPPER_SIG_LIST_CONFS_RSP) != 0)) {
 591                 DEBUG(0, ("bad list confs response sig: %s, expected: %s\n",
 592                           (sig ? sig : "NULL"), SNAPPER_SIG_LIST_CONFS_RSP));
 593                 return NT_STATUS_INVALID_PARAMETER;
 594         }
 595
 596         if (!dbus_message_iter_init(rsp_msg, &iter)) {
 597                 /* FIXME return empty? */
 598                 DEBUG(0, ("Message has no arguments!\n"));
 599                 return NT_STATUS_INVALID_PARAMETER;
 600         }
 601
 602         status = snapper_conf_array_unpack(mem_ctx, &iter, &num_confs, &confs);
 603         if (!NT_STATUS_IS_OK(status)) {
 604                 DEBUG(0, ("failed to unpack conf array\n"));
 605                 return status;
 606         }
 607
 608         snapper_conf_array_print(num_confs, confs);
 609
 610         *num_confs_out = num_confs;
 611         *confs_out = confs;
 612
 613         return NT_STATUS_OK;
 614 }
 615
 616 static NTSTATUS snapper_list_snaps_pack(TALLOC_CTX *mem_ctx,
 617                                         char *snapper_conf,
 618                                         DBusMessage **req_msg_out)
 619 {
 620         DBusMessage *msg;
 621         DBusMessageIter args;
 622         char *conf_encoded;
 623         NTSTATUS status;
 624
 625         msg = dbus_message_new_method_call("org.opensuse.Snapper", /* target for the method call */
 626                                            "/org/opensuse/Snapper", /* object to call on */
 627                                            "org.opensuse.Snapper", /* interface to call on */
 628                                            "ListSnapshots"); /* method name */
 629         if (msg == NULL) {
 630                 DEBUG(0, ("failed to create list snaps message\n"));
 631                 return NT_STATUS_NO_MEMORY;
 632         }
 633
 634         status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
 635         if (!NT_STATUS_IS_OK(status)) {
 636                 dbus_message_unref(msg);
 637                 return status;
 638         }
 639
 640         /* append arguments */
 641         dbus_message_iter_init_append(msg, &args);
 642         if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
 643                                             &conf_encoded)) {
 644                 talloc_free(conf_encoded);
 645                 dbus_message_unref(msg);
 646                 return NT_STATUS_NO_MEMORY;
 647         }
 648
 649         *req_msg_out = msg;
 650
 651         return NT_STATUS_OK;
 652 }
 653
 654 static NTSTATUS snapper_snap_struct_unpack(TALLOC_CTX *mem_ctx,
 655                                            DBusMessageIter *iter,
 656                                            struct snapper_snap *snap_out)
 657 {
 658         NTSTATUS status;
 659         DBusMessageIter st_iter;
 660         char *desc_encoded;
 661         char *cleanup_encoded;
 662
 663         status = snapper_type_check(iter, DBUS_TYPE_STRUCT);
 664         if (!NT_STATUS_IS_OK(status)) {
 665                 return status;
 666         }
 667         dbus_message_iter_recurse(iter, &st_iter);
 668
 669         status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
 670                                         &snap_out->id);
 671         if (!NT_STATUS_IS_OK(status)) {
 672                 return status;
 673         }
 674
 675         dbus_message_iter_next(&st_iter);
 676         status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT16,
 677                                         &snap_out->type);
 678         if (!NT_STATUS_IS_OK(status)) {
 679                 return status;
 680         }
 681
 682         dbus_message_iter_next(&st_iter);
 683         status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
 684                                         &snap_out->pre_id);
 685         if (!NT_STATUS_IS_OK(status)) {
 686                 return status;
 687         }
 688
 689         dbus_message_iter_next(&st_iter);
 690         status = snapper_type_check_get(&st_iter, DBUS_TYPE_INT64,
 691                                         &snap_out->time);
 692         if (!NT_STATUS_IS_OK(status)) {
 693                 return status;
 694         }
 695
 696         dbus_message_iter_next(&st_iter);
 697         status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
 698                                         &snap_out->creator_uid);
 699         if (!NT_STATUS_IS_OK(status)) {
 700                 return status;
 701         }
 702
 703         dbus_message_iter_next(&st_iter);
 704         status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
 705                                         &desc_encoded);
 706         if (!NT_STATUS_IS_OK(status)) {
 707                 return status;
 708         }
 709
 710         status = snapper_dbus_str_decode(mem_ctx, desc_encoded,
 711                                          &snap_out->desc);
 712         if (!NT_STATUS_IS_OK(status)) {
 713                 return status;
 714         }
 715
 716         dbus_message_iter_next(&st_iter);
 717         status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
 718                                         &cleanup_encoded);
 719         if (!NT_STATUS_IS_OK(status)) {
 720                 talloc_free(snap_out->desc);
 721                 return status;
 722         }
 723
 724         status = snapper_dbus_str_decode(mem_ctx, cleanup_encoded,
 725                                          &snap_out->cleanup);
 726         if (!NT_STATUS_IS_OK(status)) {
 727                 talloc_free(snap_out->desc);
 728                 return status;
 729         }
 730
 731         dbus_message_iter_next(&st_iter);
 732         status = snapper_dict_array_unpack(mem_ctx, &st_iter,
 733                                            &snap_out->num_user_data,
 734                                            &snap_out->user_data);
 735         if (!NT_STATUS_IS_OK(status)) {
 736                 talloc_free(snap_out->cleanup);
 737                 talloc_free(snap_out->desc);
 738                 return status;
 739         }
 740
 741         return NT_STATUS_OK;
 742 }
 743
 744 static void snapper_snap_array_print(int32_t num_snaps,
 745                                      struct snapper_snap *snaps)
 746 {
 747         int i;
 748
 749         for (i = 0; i < num_snaps; i++) {
 750                 DEBUG(10, ("id: %u, "
 751                            "type: %u, "
 752                            "pre_id: %u, "
 753                            "time: %ld, "
 754                            "creator_uid: %u, "
 755                            "desc: %s, "
 756                            "cleanup: %s\n",
 757                            (unsigned int)snaps[i].id,
 758                            (unsigned int)snaps[i].type,
 759                            (unsigned int)snaps[i].pre_id,
 760                            (long int)snaps[i].time,
 761                            (unsigned int)snaps[i].creator_uid,
 762                            snaps[i].desc,
 763                            snaps[i].cleanup));
 764                 snapper_dict_array_print(snaps[i].num_user_data,
 765                                          snaps[i].user_data);
 766         }
 767 }
 768
 769 static NTSTATUS snapper_snap_array_unpack(TALLOC_CTX *mem_ctx,
 770                                           DBusMessageIter *iter,
 771                                           uint32_t *num_snaps_out,
 772                                           struct snapper_snap **snaps_out)
 773 {
 774         uint32_t num_snaps;
 775         NTSTATUS status;
 776         struct snapper_snap *snaps = NULL;
 777         DBusMessageIter array_iter;
 778
 779
 780         status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 return status;
 783         }
 784         dbus_message_iter_recurse(iter, &array_iter);
 785
 786         num_snaps = 0;
 787         while (dbus_message_iter_get_arg_type(&array_iter)
 788                                                         != DBUS_TYPE_INVALID) {
 789                 num_snaps++;
 790                 snaps = talloc_realloc(mem_ctx, snaps, struct snapper_snap,
 791                                        num_snaps);
 792                 if (snaps == NULL)
 793                         abort();
 794
 795                 status = snapper_snap_struct_unpack(snaps, &array_iter,
 796                                                     &snaps[num_snaps - 1]);
 797                 if (!NT_STATUS_IS_OK(status)) {
 798                         talloc_free(snaps);
 799                         return status;
 800                 }
 801                 dbus_message_iter_next(&array_iter);
 802         }
 803
 804         *num_snaps_out = num_snaps;
 805         *snaps_out = snaps;
 806
 807         return NT_STATUS_OK;
 808 }
 809
 810 static NTSTATUS snapper_list_snaps_unpack(TALLOC_CTX *mem_ctx,
 811                                           DBusMessage *rsp_msg,
 812                                           uint32_t *num_snaps_out,
 813                                           struct snapper_snap **snaps_out)
 814 {
 815         NTSTATUS status;
 816         DBusMessageIter iter;
 817         int msg_type;
 818         uint32_t num_snaps;
 819         struct snapper_snap *snaps;
 820         const char *sig;
 821
 822         msg_type = dbus_message_get_type(rsp_msg);
 823         if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
 824                 const char *err_str = dbus_message_get_error_name(rsp_msg);
 825                 DEBUG(0, ("list_snaps error response: %s\n", err_str));
 826                 return snapper_err_ntstatus_map(err_str);
 827         }
 828
 829         if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
 830                 DEBUG(0,("unexpected list_snaps ret type: %d\n",
 831                          msg_type));
 832                 return NT_STATUS_INVALID_PARAMETER;
 833         }
 834
 835         sig = dbus_message_get_signature(rsp_msg);
 836         if ((sig == NULL)
 837          || (strcmp(sig, SNAPPER_SIG_LIST_SNAPS_RSP) != 0)) {
 838                 DEBUG(0, ("bad list snaps response sig: %s, "
 839                           "expected: %s\n",
 840                           (sig ? sig : "NULL"),
 841                           SNAPPER_SIG_LIST_SNAPS_RSP));
 842                 return NT_STATUS_INVALID_PARAMETER;
 843         }
 844
 845         /* read the parameters */
 846         if (!dbus_message_iter_init(rsp_msg, &iter)) {
 847                 DEBUG(0, ("response has no arguments!\n"));
 848                 return NT_STATUS_INVALID_PARAMETER;
 849         }
 850
 851         status = snapper_snap_array_unpack(mem_ctx, &iter, &num_snaps, &snaps);
 852         if (!NT_STATUS_IS_OK(status)) {
 853                 DEBUG(0, ("failed to unpack snap array\n"));
 854                 return NT_STATUS_INVALID_PARAMETER;
 855         }
 856
 857         snapper_snap_array_print(num_snaps, snaps);
 858
 859         *num_snaps_out = num_snaps;
 860         *snaps_out = snaps;
 861
 862         return NT_STATUS_OK;
 863 }
 864
 865 static NTSTATUS snapper_create_snap_pack(TALLOC_CTX *mem_ctx,
 866                                          const char *snapper_conf,
 867                                          const char *desc,
 868                                          uint32_t num_user_data,
 869                                          struct snapper_dict *user_data,
 870                                          DBusMessage **req_msg_out)
 871 {
 872         DBusMessage *msg;
 873         DBusMessageIter args;
 874         DBusMessageIter array_iter;
 875         DBusMessageIter struct_iter;
 876         const char *empty = "";
 877         char *str_encoded;
 878         uint32_t i;
 879         bool ok;
 880         TALLOC_CTX *enc_ctx;
 881         NTSTATUS status;
 882
 883         DEBUG(10, ("CreateSingleSnapshot: %s, %s, %s, num user %u\n",
 884                   snapper_conf, desc, empty, num_user_data));
 885
 886         enc_ctx = talloc_new(mem_ctx);
 887         if (enc_ctx == NULL) {
 888                 return NT_STATUS_NO_MEMORY;
 889         }
 890
 891         msg = dbus_message_new_method_call("org.opensuse.Snapper",
 892                                            "/org/opensuse/Snapper",
 893                                            "org.opensuse.Snapper",
 894                                            "CreateSingleSnapshot");
 895         if (msg == NULL) {
 896                 DEBUG(0, ("failed to create req msg\n"));
 897                 talloc_free(enc_ctx);
 898                 return NT_STATUS_NO_MEMORY;
 899         }
 900
 901         status = snapper_dbus_str_encode(enc_ctx, snapper_conf, &str_encoded);
 902         if (!NT_STATUS_IS_OK(status)) {
 903                 dbus_message_unref(msg);
 904                 talloc_free(enc_ctx);
 905                 return status;
 906         }
 907
 908         /* append arguments */
 909         dbus_message_iter_init_append(msg, &args);
 910         ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
 911                                             &str_encoded);
 912         if (!ok) {
 913                 dbus_message_unref(msg);
 914                 talloc_free(enc_ctx);
 915                 return NT_STATUS_NO_MEMORY;
 916         }
 917
 918         status = snapper_dbus_str_encode(enc_ctx, desc, &str_encoded);
 919         if (!NT_STATUS_IS_OK(status)) {
 920                 dbus_message_unref(msg);
 921                 talloc_free(enc_ctx);
 922                 return status;
 923         }
 924
 925         ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
 926                                             &str_encoded);
 927         if (!ok) {
 928                 dbus_message_unref(msg);
 929                 talloc_free(enc_ctx);
 930                 return NT_STATUS_NO_MEMORY;
 931         }
 932
 933         /* cleanup - no need to encode empty string */
 934         ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
 935                                             &empty);
 936         if (!ok) {
 937                 dbus_message_unref(msg);
 938                 talloc_free(enc_ctx);
 939                 return NT_STATUS_NO_MEMORY;
 940         }
 941
 942         ok = dbus_message_iter_open_container(&args, DBUS_TYPE_ARRAY,
 943                                               SNAPPER_SIG_STRING_DICT,
 944                                               &array_iter);
 945         if (!ok) {
 946                 dbus_message_unref(msg);
 947                 talloc_free(enc_ctx);
 948                 return NT_STATUS_NO_MEMORY;
 949         }
 950
 951         for (i = 0; i < num_user_data; i++) {
 952                 ok = dbus_message_iter_open_container(&array_iter,
 953                                                       DBUS_TYPE_DICT_ENTRY,
 954                                                       NULL, &struct_iter);
 955                 if (!ok) {
 956                         dbus_message_unref(msg);
 957                         talloc_free(enc_ctx);
 958                         return NT_STATUS_NO_MEMORY;
 959                 }
 960
 961                 status = snapper_dbus_str_encode(enc_ctx, user_data[i].key,
 962                                                  &str_encoded);
 963                 if (!NT_STATUS_IS_OK(status)) {
 964                         dbus_message_unref(msg);
 965                         talloc_free(enc_ctx);
 966                         return status;
 967                 }
 968
 969                 ok = dbus_message_iter_append_basic(&struct_iter,
 970                                                     DBUS_TYPE_STRING,
 971                                                     &str_encoded);
 972                 if (!ok) {
 973                         dbus_message_unref(msg);
 974                         talloc_free(enc_ctx);
 975                         return NT_STATUS_NO_MEMORY;
 976                 }
 977
 978                 status = snapper_dbus_str_encode(enc_ctx, user_data[i].val,
 979                                                  &str_encoded);
 980                 if (!NT_STATUS_IS_OK(status)) {
 981                         dbus_message_unref(msg);
 982                         talloc_free(enc_ctx);
 983                         return status;
 984                 }
 985
 986                 ok = dbus_message_iter_append_basic(&struct_iter,
 987                                                     DBUS_TYPE_STRING,
 988                                                     &str_encoded);
 989                 if (!ok) {
 990                         dbus_message_unref(msg);
 991                         talloc_free(enc_ctx);
 992                         return NT_STATUS_NO_MEMORY;
 993                 }
 994
 995                 ok = dbus_message_iter_close_container(&array_iter, &struct_iter);
 996                 if (!ok) {
 997                         dbus_message_unref(msg);
 998                         talloc_free(enc_ctx);
 999                         return NT_STATUS_NO_MEMORY;
1000                 }
1001         }
1002
1003         ok = dbus_message_iter_close_container(&args, &array_iter);
1004         if (!ok) {
1005                 dbus_message_unref(msg);
1006                 talloc_free(enc_ctx);
1007                 return NT_STATUS_NO_MEMORY;
1008         }
1009
1010         *req_msg_out = msg;
1011
1012         return NT_STATUS_OK;
1013 }
1014
1015 static NTSTATUS snapper_create_snap_unpack(DBusConnection *conn,
1016                                            DBusMessage *rsp_msg,
1017                                            uint32_t *snap_id_out)
1018 {
1019         NTSTATUS status;
1020         DBusMessageIter iter;
1021         int msg_type;
1022         const char *sig;
1023         uint32_t snap_id;
1024
1025         msg_type = dbus_message_get_type(rsp_msg);
1026         if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
1027                 const char *err_str = dbus_message_get_error_name(rsp_msg);
1028                 DEBUG(0, ("create snap error response: %s, euid %d egid %d\n",
1029                           err_str, geteuid(), getegid()));
1030                 return snapper_err_ntstatus_map(err_str);
1031         }
1032
1033         if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
1034                 DEBUG(0, ("unexpected create snap ret type: %d\n",
1035                           msg_type));
1036                 return NT_STATUS_INVALID_PARAMETER;
1037         }
1038
1039         sig = dbus_message_get_signature(rsp_msg);
1040         if ((sig == NULL)
1041          || (strcmp(sig, SNAPPER_SIG_CREATE_SNAP_RSP) != 0)) {
1042                 DEBUG(0, ("bad create snap response sig: %s, expected: %s\n",
1043                           (sig ? sig : "NULL"), SNAPPER_SIG_CREATE_SNAP_RSP));
1044                 return NT_STATUS_INVALID_PARAMETER;
1045         }
1046
1047         /* read the parameters */
1048         if (!dbus_message_iter_init(rsp_msg, &iter)) {
1049                 DEBUG(0, ("response has no arguments!\n"));
1050                 return NT_STATUS_INVALID_PARAMETER;
1051         }
1052
1053         status = snapper_type_check_get(&iter, DBUS_TYPE_UINT32, &snap_id);
1054         if (!NT_STATUS_IS_OK(status)) {
1055                 return status;
1056         }
1057         *snap_id_out = snap_id;
1058
1059         return NT_STATUS_OK;
1060 }
1061
1062 static NTSTATUS snapper_del_snap_pack(TALLOC_CTX *mem_ctx,
1063                                       const char *snapper_conf,
1064                                       uint32_t snap_id,
1065                                       DBusMessage **req_msg_out)
1066 {
1067         DBusMessage *msg;
1068         DBusMessageIter args;
1069         DBusMessageIter array_iter;
1070         char *conf_encoded;
1071         bool ok;
1072         NTSTATUS status;
1073
1074         msg = dbus_message_new_method_call("org.opensuse.Snapper",
1075                                            "/org/opensuse/Snapper",
1076                                            "org.opensuse.Snapper",
1077                                            "DeleteSnapshots");
1078         if (msg == NULL) {
1079                 DEBUG(0, ("failed to create req msg\n"));
1080                 return NT_STATUS_NO_MEMORY;
1081         }
1082
1083         status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
1084         if (!NT_STATUS_IS_OK(status)) {
1085                 dbus_message_unref(msg);
1086                 return status;
1087         }
1088
1089         /* append arguments */
1090         dbus_message_iter_init_append(msg, &args);
1091         ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
1092                                             &conf_encoded);
1093         if (!ok) {
1094                 talloc_free(conf_encoded);
1095                 dbus_message_unref(msg);
1096                 return NT_STATUS_NO_MEMORY;
1097         }
1098
1099         ok = dbus_message_iter_open_container(&args, DBUS_TYPE_ARRAY,
1100                                                DBUS_TYPE_UINT32_AS_STRING,
1101                                                &array_iter);
1102         if (!ok) {
1103                 talloc_free(conf_encoded);
1104                 dbus_message_unref(msg);
1105                 return NT_STATUS_NO_MEMORY;
1106         }
1107
1108         ok = dbus_message_iter_append_basic(&array_iter,
1109                                             DBUS_TYPE_UINT32,
1110                                             &snap_id);
1111         if (!ok) {
1112                 talloc_free(conf_encoded);
1113                 dbus_message_unref(msg);
1114                 return NT_STATUS_NO_MEMORY;
1115         }
1116
1117         dbus_message_iter_close_container(&args, &array_iter);
1118         *req_msg_out = msg;
1119
1120         return NT_STATUS_OK;
1121 }
1122
1123 static NTSTATUS snapper_del_snap_unpack(DBusConnection *conn,
1124                                         DBusMessage *rsp_msg)
1125 {
1126         int msg_type;
1127         const char *sig;
1128
1129         msg_type = dbus_message_get_type(rsp_msg);
1130         if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
1131                 const char *err_str = dbus_message_get_error_name(rsp_msg);
1132                 DEBUG(0, ("del snap error response: %s\n", err_str));
1133                 return snapper_err_ntstatus_map(err_str);
1134         }
1135
1136         if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
1137                 DEBUG(0, ("unexpected del snap ret type: %d\n",
1138                           msg_type));
1139                 return NT_STATUS_INVALID_PARAMETER;
1140         }
1141
1142         sig = dbus_message_get_signature(rsp_msg);
1143         if ((sig == NULL)
1144          || (strcmp(sig, SNAPPER_SIG_DEL_SNAPS_RSP) != 0)) {
1145                 DEBUG(0, ("bad create snap response sig: %s, expected: %s\n",
1146                           (sig ? sig : "NULL"), SNAPPER_SIG_DEL_SNAPS_RSP));
1147                 return NT_STATUS_INVALID_PARAMETER;
1148         }
1149
1150         /* no parameters in response */
1151
1152         return NT_STATUS_OK;
1153 }
1154
1155 static NTSTATUS snapper_list_snaps_at_time_pack(TALLOC_CTX *mem_ctx,
1156                                                 const char *snapper_conf,
1157                                                 time_t time_lower,
1158                                                 time_t time_upper,
1159                                                 DBusMessage **req_msg_out)
1160 {
1161         DBusMessage *msg;
1162         DBusMessageIter args;
1163         char *conf_encoded;
1164         NTSTATUS status;
1165
1166         msg = dbus_message_new_method_call("org.opensuse.Snapper",
1167                                            "/org/opensuse/Snapper",
1168                                            "org.opensuse.Snapper",
1169                                            "ListSnapshotsAtTime");
1170         if (msg == NULL) {
1171                 DEBUG(0, ("failed to create list snaps message\n"));
1172                 return NT_STATUS_NO_MEMORY;
1173         }
1174
1175         status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
1176         if (!NT_STATUS_IS_OK(status)) {
1177                 dbus_message_unref(msg);
1178                 return status;
1179         }
1180
1181         dbus_message_iter_init_append(msg, &args);
1182         if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
1183                                             &conf_encoded)) {
1184                 talloc_free(conf_encoded);
1185                 dbus_message_unref(msg);
1186                 return NT_STATUS_NO_MEMORY;
1187         }
1188
1189         if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_INT64,
1190                                             &time_lower)) {
1191                 talloc_free(conf_encoded);
1192                 dbus_message_unref(msg);
1193                 return NT_STATUS_NO_MEMORY;
1194         }
1195
1196         if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_INT64,
1197                                             &time_upper)) {
1198                 talloc_free(conf_encoded);
1199                 dbus_message_unref(msg);
1200                 return NT_STATUS_NO_MEMORY;
1201         }
1202
1203         *req_msg_out = msg;
1204
1205         return NT_STATUS_OK;
1206 }
1207 /* no snapper_list_snaps_at_time_unpack, use snapper_list_snaps_unpack */
1208
1209 /*
1210  * Determine the snapper snapshot id given a path.
1211  * Ideally this should be determined via a lookup.
1212  */
1213 static NTSTATUS snapper_snap_path_to_id(TALLOC_CTX *mem_ctx,
1214                                         const char *snap_path,
1215                                         uint32_t *snap_id_out)
1216 {
1217         char *path_dup;
1218         char *str_idx;
1219         char *str_end;
1220         uint32_t snap_id;
1221         int error = 0;
1222
1223         path_dup = talloc_strdup(mem_ctx, snap_path);
1224         if (path_dup == NULL) {
1225                 return NT_STATUS_NO_MEMORY;
1226         }
1227
1228         /* trim trailing '/' */
1229         str_idx = path_dup + strlen(path_dup) - 1;
1230         while (*str_idx == '/') {
1231                 *str_idx = '\0';
1232                 str_idx--;
1233         }
1234
1235         str_idx = strrchr(path_dup, '/');
1236         if ((str_idx == NULL)
1237          || (strcmp(str_idx + 1, "snapshot") != 0)) {
1238                 talloc_free(path_dup);
1239                 return NT_STATUS_INVALID_PARAMETER;
1240         }
1241
1242         while (*str_idx == '/') {
1243                 *str_idx = '\0';
1244                 str_idx--;
1245         }
1246
1247         str_idx = strrchr(path_dup, '/');
1248         if (str_idx == NULL) {
1249                 talloc_free(path_dup);
1250                 return NT_STATUS_INVALID_PARAMETER;
1251         }
1252
1253         str_idx++;
1254         snap_id = strtoul_err(str_idx, &str_end, 10, &error);
1255         if (error != 0 || str_idx == str_end) {
1256                 talloc_free(path_dup);
1257                 return NT_STATUS_INVALID_PARAMETER;
1258         }
1259
1260         talloc_free(path_dup);
1261         *snap_id_out = snap_id;
1262         return NT_STATUS_OK;
1263 }
1264
1265 /*
1266  * Determine the snapper snapshot path given an id and base.
1267  * Ideally this should be determined via a lookup.
1268  */
1269 static NTSTATUS snapper_snap_id_to_path(TALLOC_CTX *mem_ctx,
1270                                         const char *base_path,
1271                                         uint32_t snap_id,
1272                                         char **snap_path_out)
1273 {
1274         char *snap_path;
1275
1276         snap_path = talloc_asprintf(mem_ctx, "%s/.snapshots/%u/snapshot",
1277                                     base_path, snap_id);
1278         if (snap_path == NULL) {
1279                 return NT_STATUS_NO_MEMORY;
1280         }
1281
1282         *snap_path_out = snap_path;
1283         return NT_STATUS_OK;
1284 }
1285
1286 static NTSTATUS snapper_get_conf_call(TALLOC_CTX *mem_ctx,
1287                                       DBusConnection *dconn,
1288                                       const char *path,
1289                                       char **conf_name_out,
1290                                       char **base_path_out)
1291 {
1292         NTSTATUS status;
1293         DBusMessage *req_msg;
1294         DBusMessage *rsp_msg;
1295         uint32_t num_confs = 0;
1296         struct snapper_conf *confs = NULL;
1297         struct snapper_conf *conf;
1298         char *conf_name;
1299         char *base_path;
1300
1301         status = snapper_list_confs_pack(&req_msg);
1302         if (!NT_STATUS_IS_OK(status)) {
1303                 goto err_out;
1304         }
1305
1306         status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1307         if (!NT_STATUS_IS_OK(status)) {
1308                 goto err_req_free;
1309         }
1310
1311         status = snapper_list_confs_unpack(mem_ctx, dconn, rsp_msg,
1312                                            &num_confs, &confs);
1313         if (!NT_STATUS_IS_OK(status)) {
1314                 goto err_rsp_free;
1315         }
1316
1317         /*
1318          * for now we only support shares where the path directly corresponds
1319          * to a snapper configuration.
1320          */
1321         conf = snapper_conf_array_base_find(num_confs, confs,
1322                                             path);
1323         if (conf == NULL) {
1324                 status = NT_STATUS_NOT_SUPPORTED;
1325                 goto err_array_free;
1326         }
1327
1328         conf_name = talloc_strdup(mem_ctx, conf->name);
1329         if (conf_name == NULL) {
1330                 status = NT_STATUS_NO_MEMORY;
1331                 goto err_array_free;
1332         }
1333         base_path = talloc_strdup(mem_ctx, conf->mnt);
1334         if (base_path == NULL) {
1335                 status = NT_STATUS_NO_MEMORY;
1336                 goto err_conf_name_free;
1337         }
1338
1339         talloc_free(confs);
1340         dbus_message_unref(rsp_msg);
1341         dbus_message_unref(req_msg);
1342
1343         *conf_name_out = conf_name;
1344         *base_path_out = base_path;
1345
1346         return NT_STATUS_OK;
1347
1348 err_conf_name_free:
1349         talloc_free(conf_name);
1350 err_array_free:
1351         talloc_free(confs);
1352 err_rsp_free:
1353         dbus_message_unref(rsp_msg);
1354 err_req_free:
1355         dbus_message_unref(req_msg);
1356 err_out:
1357         return status;
1358 }
1359
1360 /*
1361  * Check whether a path can be shadow copied. Return the base volume, allowing
1362  * the caller to determine if multiple paths lie on the same base volume.
1363  */
1364 static NTSTATUS snapper_snap_check_path(struct vfs_handle_struct *handle,
1365                                         TALLOC_CTX *mem_ctx,
1366                                         const char *service_path,
1367                                         char **base_volume)
1368 {
1369         NTSTATUS status;
1370         DBusConnection *dconn;
1371         char *conf_name;
1372         char *base_path;
1373
1374         dconn = snapper_dbus_conn_create();
1375         if (dconn == NULL) {
1376                 return NT_STATUS_UNSUCCESSFUL;
1377         }
1378
1379         status = snapper_get_conf_call(mem_ctx, dconn, service_path,
1380                                        &conf_name, &base_path);
1381         if (!NT_STATUS_IS_OK(status)) {
1382                 goto err_conn_close;
1383         }
1384
1385         talloc_free(conf_name);
1386         *base_volume = base_path;
1387         snapper_dbus_conn_destroy(dconn);
1388
1389         return NT_STATUS_OK;
1390
1391 err_conn_close:
1392         snapper_dbus_conn_destroy(dconn);
1393         return status;
1394 }
1395
1396 static NTSTATUS snapper_create_snap_call(TALLOC_CTX *mem_ctx,
1397                                          DBusConnection *dconn,
1398                                          const char *conf_name,
1399                                          const char *base_path,
1400                                          const char *snap_desc,
1401                                          uint32_t num_user_data,
1402                                          struct snapper_dict *user_data,
1403                                          char **snap_path_out)
1404 {
1405         NTSTATUS status;
1406         DBusMessage *req_msg;
1407         DBusMessage *rsp_msg;
1408         uint32_t snap_id = 0;
1409         char *snap_path;
1410
1411         status = snapper_create_snap_pack(mem_ctx,
1412                                           conf_name,
1413                                           snap_desc,
1414                                           num_user_data,
1415                                           user_data,
1416                                           &req_msg);
1417         if (!NT_STATUS_IS_OK(status)) {
1418                 goto err_out;
1419         }
1420
1421         status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1422         if (!NT_STATUS_IS_OK(status)) {
1423                 goto err_req_free;
1424         }
1425
1426         status = snapper_create_snap_unpack(dconn, rsp_msg, &snap_id);
1427         if (!NT_STATUS_IS_OK(status)) {
1428                 goto err_rsp_free;
1429         }
1430
1431         status = snapper_snap_id_to_path(mem_ctx, base_path, snap_id,
1432                                          &snap_path);
1433         if (!NT_STATUS_IS_OK(status)) {
1434                 goto err_rsp_free;
1435         }
1436
1437         dbus_message_unref(rsp_msg);
1438         dbus_message_unref(req_msg);
1439
1440         DEBUG(6, ("created new snapshot %u at %s\n", snap_id, snap_path));
1441         *snap_path_out = snap_path;
1442
1443         return NT_STATUS_OK;
1444
1445 err_rsp_free:
1446         dbus_message_unref(rsp_msg);
1447 err_req_free:
1448         dbus_message_unref(req_msg);
1449 err_out:
1450         return status;
1451 }
1452
1453 static NTSTATUS snapper_snap_create(struct vfs_handle_struct *handle,
1454                                     TALLOC_CTX *mem_ctx,
1455                                     const char *base_volume,
1456                                     time_t *tstamp,
1457                                     bool rw,
1458                                     char **_base_path,
1459                                     char **_snap_path)
1460 {
1461         DBusConnection *dconn;
1462         NTSTATUS status;
1463         char *conf_name;
1464         char *base_path;
1465         char *snap_path = NULL;
1466         TALLOC_CTX *tmp_ctx;
1467
1468         tmp_ctx = talloc_new(mem_ctx);
1469         if (tmp_ctx == NULL) {
1470                 return NT_STATUS_NO_MEMORY;
1471         }
1472
1473         dconn = snapper_dbus_conn_create();
1474         if (dconn == NULL) {
1475                 talloc_free(tmp_ctx);
1476                 return NT_STATUS_UNSUCCESSFUL;
1477         }
1478
1479         status = snapper_get_conf_call(tmp_ctx, dconn, base_volume,
1480                                        &conf_name, &base_path);
1481         if (!NT_STATUS_IS_OK(status)) {
1482                 snapper_dbus_conn_destroy(dconn);
1483                 talloc_free(tmp_ctx);
1484                 return status;
1485         }
1486
1487         status = snapper_create_snap_call(tmp_ctx, dconn,
1488                                           conf_name, base_path,
1489                                           "Snapshot created by Samba",
1490                                           0, NULL,
1491                                           &snap_path);
1492         if (!NT_STATUS_IS_OK(status)) {
1493                 snapper_dbus_conn_destroy(dconn);
1494                 talloc_free(tmp_ctx);
1495                 return status;
1496         }
1497
1498         snapper_dbus_conn_destroy(dconn);
1499         *_base_path = talloc_steal(mem_ctx, base_path);
1500         *_snap_path = talloc_steal(mem_ctx, snap_path);
1501         talloc_free(tmp_ctx);
1502
1503         return NT_STATUS_OK;
1504 }
1505
1506 static NTSTATUS snapper_delete_snap_call(TALLOC_CTX *mem_ctx,
1507                                          DBusConnection *dconn,
1508                                          const char *conf_name,
1509                                          uint32_t snap_id)
1510 {
1511         NTSTATUS status;
1512         DBusMessage *req_msg = NULL;
1513         DBusMessage *rsp_msg;
1514
1515         status = snapper_del_snap_pack(mem_ctx, conf_name, snap_id, &req_msg);
1516         if (!NT_STATUS_IS_OK(status)) {
1517                 goto err_out;
1518         }
1519
1520         status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1521         if (!NT_STATUS_IS_OK(status)) {
1522                 goto err_req_free;
1523         }
1524
1525         status = snapper_del_snap_unpack(dconn, rsp_msg);
1526         if (!NT_STATUS_IS_OK(status)) {
1527                 goto err_rsp_free;
1528         }
1529
1530         dbus_message_unref(rsp_msg);
1531         dbus_message_unref(req_msg);
1532
1533         DEBUG(6, ("deleted snapshot %u\n", snap_id));
1534
1535         return NT_STATUS_OK;
1536
1537 err_rsp_free:
1538         dbus_message_unref(rsp_msg);
1539 err_req_free:
1540         dbus_message_unref(req_msg);
1541 err_out:
1542         return status;
1543 }
1544
1545 static NTSTATUS snapper_snap_delete(struct vfs_handle_struct *handle,
1546                                     TALLOC_CTX *mem_ctx,
1547                                     char *base_path,
1548                                     char *snap_path)
1549 {
1550         DBusConnection *dconn;
1551         NTSTATUS status;
1552         char *conf_name;
1553         char *snap_base_path;
1554         uint32_t snap_id;
1555         TALLOC_CTX *tmp_ctx;
1556
1557         tmp_ctx = talloc_new(mem_ctx);
1558         if (tmp_ctx == NULL) {
1559                 return NT_STATUS_NO_MEMORY;
1560         }
1561
1562         dconn = snapper_dbus_conn_create();
1563         if (dconn == NULL) {
1564                 talloc_free(tmp_ctx);
1565                 return NT_STATUS_UNSUCCESSFUL;
1566         }
1567
1568         status = snapper_get_conf_call(tmp_ctx, dconn, base_path,
1569                                        &conf_name, &snap_base_path);
1570         if (!NT_STATUS_IS_OK(status)) {
1571                 snapper_dbus_conn_destroy(dconn);
1572                 talloc_free(tmp_ctx);
1573                 return status;
1574         }
1575
1576         status = snapper_snap_path_to_id(tmp_ctx, snap_path, &snap_id);
1577         if (!NT_STATUS_IS_OK(status)) {
1578                 snapper_dbus_conn_destroy(dconn);
1579                 talloc_free(tmp_ctx);
1580                 return status;
1581         }
1582
1583         status = snapper_delete_snap_call(tmp_ctx, dconn, conf_name, snap_id);
1584         if (!NT_STATUS_IS_OK(status)) {
1585                 snapper_dbus_conn_destroy(dconn);
1586                 talloc_free(tmp_ctx);
1587                 return status;
1588         }
1589
1590         snapper_dbus_conn_destroy(dconn);
1591         talloc_free(tmp_ctx);
1592
1593         return NT_STATUS_OK;
1594 }
1595
1596 /* sc_data used as parent talloc context for all labels */
1597 static int snapper_get_shadow_copy_data(struct vfs_handle_struct *handle,
1598                                         struct files_struct *fsp,
1599                                         struct shadow_copy_data *sc_data,
1600                                         bool labels)
1601 {
1602         DBusConnection *dconn;
1603         TALLOC_CTX *tmp_ctx;
1604         NTSTATUS status;
1605         char *conf_name;
1606         char *base_path;
1607         DBusMessage *req_msg = NULL;
1608         DBusMessage *rsp_msg;
1609         uint32_t num_snaps;
1610         struct snapper_snap *snaps;
1611         uint32_t i;
1612         uint32_t lbl_off;
1613
1614         tmp_ctx = talloc_new(sc_data);
1615         if (tmp_ctx == NULL) {
1616                 status = NT_STATUS_NO_MEMORY;
1617                 goto err_out;
1618         }
1619
1620         dconn = snapper_dbus_conn_create();
1621         if (dconn == NULL) {
1622                 status = NT_STATUS_UNSUCCESSFUL;
1623                 goto err_mem_ctx_free;
1624         }
1625
1626         if (fsp->conn->connectpath == NULL) {
1627                 status = NT_STATUS_INVALID_PARAMETER;
1628                 goto err_conn_free;
1629         }
1630
1631         status = snapper_get_conf_call(tmp_ctx, dconn,
1632                                        fsp->conn->connectpath,
1633                                        &conf_name,
1634                                        &base_path);
1635         if (!NT_STATUS_IS_OK(status)) {
1636                 goto err_conn_free;
1637         }
1638
1639         status = snapper_list_snaps_pack(tmp_ctx, conf_name, &req_msg);
1640         if (!NT_STATUS_IS_OK(status)) {
1641                 goto err_conn_free;
1642         }
1643
1644         status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1645         if (!NT_STATUS_IS_OK(status)) {
1646                 goto err_req_free;
1647         }
1648
1649         status = snapper_list_snaps_unpack(tmp_ctx, rsp_msg,
1650                                            &num_snaps, &snaps);
1651         if (!NT_STATUS_IS_OK(status)) {
1652                 goto err_rsp_free;
1653         }
1654         /* we should always get at least one snapshot (current) */
1655         if (num_snaps == 0) {
1656                 DEBUG(1, ("zero snapshots in snap list response\n"));
1657                 status = NT_STATUS_UNSUCCESSFUL;
1658                 goto err_rsp_free;
1659         }
1660
1661         /* subtract 1, (current) snapshot is not returned */
1662         sc_data->num_volumes = num_snaps - 1;
1663         sc_data->labels = NULL;
1664
1665         if ((labels == false) || (sc_data->num_volumes == 0)) {
1666                 /* tokens need not be added to the labels array */
1667                 goto done;
1668         }
1669
1670         sc_data->labels = talloc_array(sc_data, SHADOW_COPY_LABEL,
1671                                        sc_data->num_volumes);
1672         if (sc_data->labels == NULL) {
1673                 status = NT_STATUS_NO_MEMORY;
1674                 goto err_rsp_free;
1675         }
1676
1677         /* start at end for decending order, do not include 0 (current) */
1678         lbl_off = 0;
1679         for (i = num_snaps - 1; i > 0; i--) {
1680                 char *lbl = sc_data->labels[lbl_off++];
1681                 struct tm gmt_snap_time;
1682                 struct tm *tm_ret;
1683                 size_t str_sz;
1684
1685                 tm_ret = gmtime_r((time_t *)&snaps[i].time, &gmt_snap_time);
1686                 if (tm_ret == NULL) {
1687                         status = NT_STATUS_UNSUCCESSFUL;
1688                         goto err_labels_free;
1689                 }
1690                 str_sz = strftime(lbl, sizeof(SHADOW_COPY_LABEL),
1691                                   "@GMT-%Y.%m.%d-%H.%M.%S", &gmt_snap_time);
1692                 if (str_sz == 0) {
1693                         status = NT_STATUS_UNSUCCESSFUL;
1694                         goto err_labels_free;
1695                 }
1696         }
1697
1698 done:
1699         talloc_free(tmp_ctx);
1700         dbus_message_unref(rsp_msg);
1701         dbus_message_unref(req_msg);
1702         snapper_dbus_conn_destroy(dconn);
1703
1704         return 0;
1705
1706 err_labels_free:
1707         TALLOC_FREE(sc_data->labels);
1708 err_rsp_free:
1709         dbus_message_unref(rsp_msg);
1710 err_req_free:
1711         dbus_message_unref(req_msg);
1712 err_conn_free:
1713         snapper_dbus_conn_destroy(dconn);
1714 err_mem_ctx_free:
1715         talloc_free(tmp_ctx);
1716 err_out:
1717         errno = map_errno_from_nt_status(status);
1718         return -1;
1719 }
1720
1721 static bool snapper_gmt_strip_snapshot(TALLOC_CTX *mem_ctx,
1722                                        struct vfs_handle_struct *handle,
1723                                        const char *name,
1724                                        time_t *ptimestamp,
1725                                        char **pstripped)
1726 {
1727         struct tm tm;
1728         time_t timestamp;
1729         const char *p;
1730         char *q;
1731         char *stripped;
1732         size_t rest_len, dst_len;
1733         ptrdiff_t len_before_gmt;
1734
1735         p = strstr_m(name, "@GMT-");
1736         if (p == NULL) {
1737                 goto no_snapshot;
1738         }
1739         if ((p > name) && (p[-1] != '/')) {
1740                 goto no_snapshot;
1741         }
1742         len_before_gmt = p - name;
1743         q = strptime(p, GMT_FORMAT, &tm);
1744         if (q == NULL) {
1745                 goto no_snapshot;
1746         }
1747         tm.tm_isdst = -1;
1748         timestamp = timegm(&tm);
1749         if (timestamp == (time_t)-1) {
1750                 goto no_snapshot;
1751         }
1752         if (q[0] == '\0') {
1753                 /*
1754                  * The name consists of only the GMT token or the GMT
1755                  * token is at the end of the path. XP seems to send
1756                  * @GMT- at the end under certain circumstances even
1757                  * with a path prefix.
1758                  */
1759                 if (pstripped != NULL) {
1760                         if (len_before_gmt > 0) {
1761                                 /*
1762                                  * There is a slash before
1763                                  * the @GMT-. Remove it.
1764                                  */
1765                                 len_before_gmt -= 1;
1766                         }
1767                         stripped = talloc_strndup(mem_ctx, name,
1768                                         len_before_gmt);
1769                         if (stripped == NULL) {
1770                                 return false;
1771                         }
1772                         *pstripped = stripped;
1773                 }
1774                 *ptimestamp = timestamp;
1775                 return true;
1776         }
1777         if (q[0] != '/') {
1778                 /*
1779                  * It is not a complete path component, i.e. the path
1780                  * component continues after the gmt-token.
1781                  */
1782                 goto no_snapshot;
1783         }
1784         q += 1;
1785
1786         rest_len = strlen(q);
1787         dst_len = len_before_gmt + rest_len;
1788
1789         if (pstripped != NULL) {
1790                 stripped = talloc_array(mem_ctx, char, dst_len+1);
1791                 if (stripped == NULL) {
1792                         errno = ENOMEM;
1793                         return false;
1794                 }
1795                 if (p > name) {
1796                         memcpy(stripped, name, len_before_gmt);
1797                 }
1798                 if (rest_len > 0) {
1799                         memcpy(stripped + len_before_gmt, q, rest_len);
1800                 }
1801                 stripped[dst_len] = '\0';
1802                 *pstripped = stripped;
1803         }
1804         *ptimestamp = timestamp;
1805         return true;
1806 no_snapshot:
1807         *ptimestamp = 0;
1808         return true;
1809 }
1810
1811 static NTSTATUS snapper_get_snap_at_time_call(TALLOC_CTX *mem_ctx,
1812                                               DBusConnection *dconn,
1813                                               const char *conf_name,
1814                                               const char *base_path,
1815                                               time_t snaptime,
1816                                               char **snap_path_out)
1817 {
1818         NTSTATUS status;
1819         DBusMessage *req_msg = NULL;
1820         DBusMessage *rsp_msg;
1821         uint32_t num_snaps;
1822         struct snapper_snap *snaps;
1823         char *snap_path;
1824
1825         status = snapper_list_snaps_at_time_pack(mem_ctx,
1826                                                  conf_name,
1827                                                  snaptime,
1828                                                  snaptime,
1829                                                  &req_msg);
1830         if (!NT_STATUS_IS_OK(status)) {
1831                 goto err_out;
1832         }
1833
1834         status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1835         if (!NT_STATUS_IS_OK(status)) {
1836                 goto err_req_free;
1837         }
1838
1839         status = snapper_list_snaps_unpack(mem_ctx, rsp_msg,
1840                                            &num_snaps, &snaps);
1841         if (!NT_STATUS_IS_OK(status)) {
1842                 goto err_rsp_free;
1843         }
1844
1845         if (num_snaps == 0) {
1846                 DEBUG(4, ("no snapshots found with time: %lu\n",
1847                           (unsigned long)snaptime));
1848                 status = NT_STATUS_INVALID_PARAMETER;
1849                 goto err_snap_array_free;
1850         } else if (num_snaps > 0) {
1851                 DEBUG(4, ("got %u snapshots for single time %lu, using top\n",
1852                           num_snaps, (unsigned long)snaptime));
1853         }
1854
1855         status = snapper_snap_id_to_path(mem_ctx, base_path, snaps[0].id,
1856                                          &snap_path);
1857         if (!NT_STATUS_IS_OK(status)) {
1858                 goto err_snap_array_free;
1859         }
1860
1861         *snap_path_out = snap_path;
1862 err_snap_array_free:
1863         talloc_free(snaps);
1864 err_rsp_free:
1865         dbus_message_unref(rsp_msg);
1866 err_req_free:
1867         dbus_message_unref(req_msg);
1868 err_out:
1869         return status;
1870 }
1871
1872 static NTSTATUS snapper_snap_path_expand(struct connection_struct *conn,
1873                                          TALLOC_CTX *mem_ctx,
1874                                          time_t snap_time,
1875                                          char **snap_dir_out)
1876 {
1877         DBusConnection *dconn;
1878         NTSTATUS status;
1879         char *conf_name;
1880         char *base_path;
1881         char *snap_path = NULL;
1882
1883         dconn = snapper_dbus_conn_create();
1884         if (dconn == NULL) {
1885                 status = NT_STATUS_UNSUCCESSFUL;
1886                 goto err_out;
1887         }
1888
1889         if (conn->connectpath == NULL) {
1890                 status = NT_STATUS_INVALID_PARAMETER;
1891                 goto err_conn_free;
1892         }
1893
1894         status = snapper_get_conf_call(mem_ctx, dconn,
1895                                        conn->connectpath,
1896                                        &conf_name,
1897                                        &base_path);
1898         if (!NT_STATUS_IS_OK(status)) {
1899                 goto err_conn_free;
1900         }
1901
1902         status = snapper_get_snap_at_time_call(mem_ctx, dconn,
1903                                                conf_name, base_path, snap_time,
1904                                                &snap_path);
1905         if (!NT_STATUS_IS_OK(status)) {
1906                 goto err_conf_name_free;
1907         }
1908
1909         /* confirm snapshot path is nested under base path */
1910         if (strncmp(snap_path, base_path, strlen(base_path)) != 0) {
1911                 status = NT_STATUS_INVALID_PARAMETER;
1912                 goto err_snap_path_free;
1913         }
1914
1915         talloc_free(conf_name);
1916         talloc_free(base_path);
1917         snapper_dbus_conn_destroy(dconn);
1918         *snap_dir_out = snap_path;
1919
1920         return NT_STATUS_OK;
1921
1922 err_snap_path_free:
1923         talloc_free(snap_path);
1924 err_conf_name_free:
1925         talloc_free(conf_name);
1926         talloc_free(base_path);
1927 err_conn_free:
1928         snapper_dbus_conn_destroy(dconn);
1929 err_out:
1930         return status;
1931 }
1932
1933 static char *snapper_gmt_convert(TALLOC_CTX *mem_ctx,
1934                              struct vfs_handle_struct *handle,
1935                              const char *name, time_t timestamp)
1936 {
1937         char *snap_path = NULL;
1938         char *path = NULL;
1939         NTSTATUS status;
1940         int saved_errno;
1941
1942         status = snapper_snap_path_expand(handle->conn, mem_ctx, timestamp,
1943                                           &snap_path);
1944         if (!NT_STATUS_IS_OK(status)) {
1945                 errno = map_errno_from_nt_status(status);
1946                 goto err_out;
1947         }
1948
1949         path = talloc_asprintf(mem_ctx, "%s/%s", snap_path, name);
1950         if (path == NULL) {
1951                 errno = ENOMEM;
1952                 goto err_snap_path_free;
1953         }
1954
1955         DEBUG(10, ("converted %s/%s @ time to %s\n",
1956                    handle->conn->connectpath, name, path));
1957         return path;
1958
1959 err_snap_path_free:
1960         saved_errno = errno;
1961         talloc_free(snap_path);
1962         errno = saved_errno;
1963 err_out:
1964         return NULL;
1965 }
1966
1967 static DIR *snapper_gmt_opendir(vfs_handle_struct *handle,
1968                                 const struct smb_filename *smb_fname,
1969                                 const char *mask,
1970                                 uint32_t attr)
1971 {
1972         time_t timestamp;
1973         char *stripped;
1974         DIR *ret;
1975         int saved_errno;
1976         char *conv;
1977         struct smb_filename *conv_smb_fname = NULL;
1978
1979         if (!snapper_gmt_strip_snapshot(talloc_tos(),
1980                         handle,
1981                         smb_fname->base_name,
1982                         &timestamp,
1983                         &stripped)) {
1984                 return NULL;
1985         }
1986         if (timestamp == 0) {
1987                 return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
1988         }
1989         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
1990         TALLOC_FREE(stripped);
1991         if (conv == NULL) {
1992                 return NULL;
1993         }
1994         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1995                                         conv,
1996                                         NULL,
1997                                         NULL,
1998                                         smb_fname->flags);
1999         if (conv_smb_fname == NULL) {
2000                 TALLOC_FREE(conv);
2001                 errno = ENOMEM;
2002                 return NULL;
2003         }
2004
2005         ret = SMB_VFS_NEXT_OPENDIR(handle, conv_smb_fname, mask, attr);
2006         saved_errno = errno;
2007         TALLOC_FREE(conv);
2008         TALLOC_FREE(conv_smb_fname);
2009         errno = saved_errno;
2010         return ret;
2011 }
2012
2013 static int snapper_gmt_rename(vfs_handle_struct *handle,
2014                               const struct smb_filename *smb_fname_src,
2015                               const struct smb_filename *smb_fname_dst)
2016 {
2017         time_t timestamp_src, timestamp_dst;
2018
2019         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2020                                         smb_fname_src->base_name,
2021                                         &timestamp_src, NULL)) {
2022                 return -1;
2023         }
2024         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2025                                         smb_fname_dst->base_name,
2026                                         &timestamp_dst, NULL)) {
2027                 return -1;
2028         }
2029         if (timestamp_src != 0) {
2030                 errno = EXDEV;
2031                 return -1;
2032         }
2033         if (timestamp_dst != 0) {
2034                 errno = EROFS;
2035                 return -1;
2036         }
2037         return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
2038 }
2039
2040 static int snapper_gmt_symlink(vfs_handle_struct *handle,
2041                                 const char *link_contents,
2042                                 const struct smb_filename *new_smb_fname)
2043 {
2044         time_t timestamp_old = 0;
2045         time_t timestamp_new = 0;
2046
2047         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2048                                 handle,
2049                                 link_contents,
2050                                 &timestamp_old,
2051                                 NULL)) {
2052                 return -1;
2053         }
2054         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2055                                 handle,
2056                                 new_smb_fname->base_name,
2057                                 &timestamp_new,
2058                                 NULL)) {
2059                 return -1;
2060         }
2061         if ((timestamp_old != 0) || (timestamp_new != 0)) {
2062                 errno = EROFS;
2063                 return -1;
2064         }
2065         return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
2066 }
2067
2068 static int snapper_gmt_link(vfs_handle_struct *handle,
2069                                 const struct smb_filename *old_smb_fname,
2070                                 const struct smb_filename *new_smb_fname)
2071 {
2072         time_t timestamp_old = 0;
2073         time_t timestamp_new = 0;
2074
2075         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2076                                 handle,
2077                                 old_smb_fname->base_name,
2078                                 &timestamp_old,
2079                                 NULL)) {
2080                 return -1;
2081         }
2082         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2083                                 handle,
2084                                 new_smb_fname->base_name,
2085                                 &timestamp_new,
2086                                 NULL)) {
2087                 return -1;
2088         }
2089         if ((timestamp_old != 0) || (timestamp_new != 0)) {
2090                 errno = EROFS;
2091                 return -1;
2092         }
2093         return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
2094 }
2095
2096 static int snapper_gmt_stat(vfs_handle_struct *handle,
2097                             struct smb_filename *smb_fname)
2098 {
2099         time_t timestamp;
2100         char *stripped, *tmp;
2101         int ret, saved_errno;
2102
2103         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2104                                         smb_fname->base_name,
2105                                         &timestamp, &stripped)) {
2106                 return -1;
2107         }
2108         if (timestamp == 0) {
2109                 return SMB_VFS_NEXT_STAT(handle, smb_fname);
2110         }
2111
2112         tmp = smb_fname->base_name;
2113         smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2114                                                    stripped, timestamp);
2115         TALLOC_FREE(stripped);
2116
2117         if (smb_fname->base_name == NULL) {
2118                 smb_fname->base_name = tmp;
2119                 return -1;
2120         }
2121
2122         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
2123         saved_errno = errno;
2124
2125         TALLOC_FREE(smb_fname->base_name);
2126         smb_fname->base_name = tmp;
2127
2128         errno = saved_errno;
2129         return ret;
2130 }
2131
2132 static int snapper_gmt_lstat(vfs_handle_struct *handle,
2133                              struct smb_filename *smb_fname)
2134 {
2135         time_t timestamp;
2136         char *stripped, *tmp;
2137         int ret, saved_errno;
2138
2139         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2140                                         smb_fname->base_name,
2141                                         &timestamp, &stripped)) {
2142                 return -1;
2143         }
2144         if (timestamp == 0) {
2145                 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2146         }
2147
2148         tmp = smb_fname->base_name;
2149         smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2150                                                    stripped, timestamp);
2151         TALLOC_FREE(stripped);
2152
2153         if (smb_fname->base_name == NULL) {
2154                 smb_fname->base_name = tmp;
2155                 return -1;
2156         }
2157
2158         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2159         saved_errno = errno;
2160
2161         TALLOC_FREE(smb_fname->base_name);
2162         smb_fname->base_name = tmp;
2163
2164         errno = saved_errno;
2165         return ret;
2166 }
2167
2168 static int snapper_gmt_open(vfs_handle_struct *handle,
2169                             struct smb_filename *smb_fname, files_struct *fsp,
2170                             int flags, mode_t mode)
2171 {
2172         time_t timestamp;
2173         char *stripped, *tmp;
2174         int ret, saved_errno;
2175
2176         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2177                                         smb_fname->base_name,
2178                                         &timestamp, &stripped)) {
2179                 return -1;
2180         }
2181         if (timestamp == 0) {
2182                 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
2183         }
2184
2185         tmp = smb_fname->base_name;
2186         smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2187                                                    stripped, timestamp);
2188         TALLOC_FREE(stripped);
2189
2190         if (smb_fname->base_name == NULL) {
2191                 smb_fname->base_name = tmp;
2192                 return -1;
2193         }
2194
2195         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
2196         saved_errno = errno;
2197
2198         TALLOC_FREE(smb_fname->base_name);
2199         smb_fname->base_name = tmp;
2200
2201         errno = saved_errno;
2202         return ret;
2203 }
2204
2205 static int snapper_gmt_unlink(vfs_handle_struct *handle,
2206                               const struct smb_filename *smb_fname)
2207 {
2208         time_t timestamp;
2209         char *stripped;
2210         int ret, saved_errno;
2211         struct smb_filename *conv;
2212
2213         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2214                                         smb_fname->base_name,
2215                                         &timestamp, &stripped)) {
2216                 return -1;
2217         }
2218         if (timestamp == 0) {
2219                 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
2220         }
2221         conv = cp_smb_filename(talloc_tos(), smb_fname);
2222         if (conv == NULL) {
2223                 errno = ENOMEM;
2224                 return -1;
2225         }
2226         conv->base_name = snapper_gmt_convert(conv, handle,
2227                                               stripped, timestamp);
2228         TALLOC_FREE(stripped);
2229         if (conv->base_name == NULL) {
2230                 return -1;
2231         }
2232         ret = SMB_VFS_NEXT_UNLINK(handle, conv);
2233         saved_errno = errno;
2234         TALLOC_FREE(conv);
2235         errno = saved_errno;
2236         return ret;
2237 }
2238
2239 static int snapper_gmt_chmod(vfs_handle_struct *handle,
2240                         const struct smb_filename *smb_fname,
2241                         mode_t mode)
2242 {
2243         time_t timestamp;
2244         char *stripped = NULL;
2245         int ret, saved_errno;
2246         char *conv = NULL;
2247         struct smb_filename *conv_smb_fname = NULL;
2248
2249         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2250                                 handle,
2251                                 smb_fname->base_name,
2252                                 &timestamp,
2253                                 &stripped)) {
2254                 return -1;
2255         }
2256         if (timestamp == 0) {
2257                 TALLOC_FREE(stripped);
2258                 return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
2259         }
2260         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2261         TALLOC_FREE(stripped);
2262         if (conv == NULL) {
2263                 return -1;
2264         }
2265         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2266                                         conv,
2267                                         NULL,
2268                                         NULL,
2269                                         smb_fname->flags);
2270         if (conv_smb_fname == NULL) {
2271                 TALLOC_FREE(conv);
2272                 errno = ENOMEM;
2273                 return -1;
2274         }
2275
2276         ret = SMB_VFS_NEXT_CHMOD(handle, conv_smb_fname, mode);
2277         saved_errno = errno;
2278         TALLOC_FREE(conv);
2279         TALLOC_FREE(conv_smb_fname);
2280         errno = saved_errno;
2281         return ret;
2282 }
2283
2284 static int snapper_gmt_chown(vfs_handle_struct *handle,
2285                         const struct smb_filename *smb_fname,
2286                         uid_t uid,
2287                         gid_t gid)
2288 {
2289         time_t timestamp;
2290         char *stripped = NULL;
2291         int ret, saved_errno;
2292         char *conv = NULL;
2293         struct smb_filename *conv_smb_fname = NULL;
2294
2295         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2296                                 handle,
2297                                 smb_fname->base_name,
2298                                 &timestamp,
2299                                 &stripped)) {
2300                 return -1;
2301         }
2302         if (timestamp == 0) {
2303                 TALLOC_FREE(stripped);
2304                 return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
2305         }
2306         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2307         TALLOC_FREE(stripped);
2308         if (conv == NULL) {
2309                 return -1;
2310         }
2311         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2312                                         conv,
2313                                         NULL,
2314                                         NULL,
2315                                         smb_fname->flags);
2316         if (conv_smb_fname == NULL) {
2317                 TALLOC_FREE(conv);
2318                 errno = ENOMEM;
2319                 return -1;
2320         }
2321         ret = SMB_VFS_NEXT_CHOWN(handle, conv_smb_fname, uid, gid);
2322         saved_errno = errno;
2323         TALLOC_FREE(conv);
2324         TALLOC_FREE(conv_smb_fname);
2325         errno = saved_errno;
2326         return ret;
2327 }
2328
2329 static int snapper_gmt_chdir(vfs_handle_struct *handle,
2330                         const struct smb_filename *smb_fname)
2331 {
2332         time_t timestamp = 0;
2333         char *stripped = NULL;
2334         int ret;
2335         int saved_errno = 0;
2336         char *conv = NULL;
2337         struct smb_filename *conv_smb_fname = NULL;
2338
2339         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2340                                 handle,
2341                                 smb_fname->base_name,
2342                                 &timestamp,
2343                                 &stripped)) {
2344                 return -1;
2345         }
2346         if (timestamp == 0) {
2347                 return SMB_VFS_NEXT_CHDIR(handle, smb_fname);
2348         }
2349         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2350         TALLOC_FREE(stripped);
2351         if (conv == NULL) {
2352                 return -1;
2353         }
2354         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2355                                         conv,
2356                                         NULL,
2357                                         NULL,
2358                                         smb_fname->flags);
2359         if (conv_smb_fname == NULL) {
2360                 TALLOC_FREE(conv);
2361                 errno = ENOMEM;
2362                 return -1;
2363         }
2364         ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
2365         if (ret == -1) {
2366                 saved_errno = errno;
2367         }
2368         TALLOC_FREE(conv);
2369         TALLOC_FREE(conv_smb_fname);
2370         if (saved_errno != 0) {
2371                 errno = saved_errno;
2372         }
2373         return ret;
2374 }
2375
2376 static int snapper_gmt_ntimes(vfs_handle_struct *handle,
2377                               const struct smb_filename *smb_fname,
2378                               struct smb_file_time *ft)
2379 {
2380         time_t timestamp;
2381         char *stripped;
2382         int ret, saved_errno;
2383         struct smb_filename *conv;
2384
2385         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2386                                         smb_fname->base_name,
2387                                         &timestamp, &stripped)) {
2388                 return -1;
2389         }
2390         if (timestamp == 0) {
2391                 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
2392         }
2393         conv = cp_smb_filename(talloc_tos(), smb_fname);
2394         if (conv == NULL) {
2395                 errno = ENOMEM;
2396                 return -1;
2397         }
2398         conv->base_name = snapper_gmt_convert(conv, handle,
2399                                               stripped, timestamp);
2400         TALLOC_FREE(stripped);
2401         if (conv->base_name == NULL) {
2402                 return -1;
2403         }
2404         ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
2405         saved_errno = errno;
2406         TALLOC_FREE(conv);
2407         errno = saved_errno;
2408         return ret;
2409 }
2410
2411 static int snapper_gmt_readlink(vfs_handle_struct *handle,
2412                                 const struct smb_filename *smb_fname,
2413                                 char *buf,
2414                                 size_t bufsiz)
2415 {
2416         time_t timestamp = 0;
2417         char *stripped = NULL;
2418         int ret;
2419         int saved_errno = 0;
2420         struct smb_filename *conv = NULL;
2421
2422         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2423                                         smb_fname->base_name,
2424                                         &timestamp, &stripped)) {
2425                 return -1;
2426         }
2427         if (timestamp == 0) {
2428                 return SMB_VFS_NEXT_READLINK(handle, smb_fname, buf, bufsiz);
2429         }
2430         conv = cp_smb_filename(talloc_tos(), smb_fname);
2431         if (conv == NULL) {
2432                 TALLOC_FREE(stripped);
2433                 errno = ENOMEM;
2434                 return -1;
2435         }
2436         conv->base_name = snapper_gmt_convert(conv, handle,
2437                                               stripped, timestamp);
2438         TALLOC_FREE(stripped);
2439         if (conv->base_name == NULL) {
2440                 return -1;
2441         }
2442         ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
2443         if (ret == -1) {
2444                 saved_errno = errno;
2445         }
2446         TALLOC_FREE(conv);
2447         if (saved_errno != 0) {
2448                 errno = saved_errno;
2449         }
2450         return ret;
2451 }
2452
2453 static int snapper_gmt_mknod(vfs_handle_struct *handle,
2454                         const struct smb_filename *smb_fname,
2455                         mode_t mode,
2456                         SMB_DEV_T dev)
2457 {
2458         time_t timestamp = (time_t)0;
2459         char *stripped = NULL;
2460         int ret, saved_errno = 0;
2461         struct smb_filename *conv_smb_fname = NULL;
2462
2463         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2464                                         smb_fname->base_name,
2465                                         &timestamp, &stripped)) {
2466                 return -1;
2467         }
2468         if (timestamp == 0) {
2469                 return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
2470         }
2471         conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
2472         if (conv_smb_fname == NULL) {
2473                 errno = ENOMEM;
2474                 return -1;
2475         }
2476         conv_smb_fname->base_name = snapper_gmt_convert(conv_smb_fname, handle,
2477                                               stripped, timestamp);
2478         TALLOC_FREE(stripped);
2479         if (conv_smb_fname->base_name == NULL) {
2480                 return -1;
2481         }
2482         ret = SMB_VFS_NEXT_MKNOD(handle, conv_smb_fname, mode, dev);
2483         if (ret == -1) {
2484                 saved_errno = errno;
2485         }
2486         TALLOC_FREE(conv_smb_fname);
2487         if (saved_errno != 0) {
2488                 errno = saved_errno;
2489         }
2490         return ret;
2491 }
2492
2493 static struct smb_filename *snapper_gmt_realpath(vfs_handle_struct *handle,
2494                                 TALLOC_CTX *ctx,
2495                                 const struct smb_filename *smb_fname)
2496 {
2497         time_t timestamp = 0;
2498         char *stripped = NULL;
2499         struct smb_filename *result_fname = NULL;
2500         struct smb_filename *conv_smb_fname = NULL;
2501         int saved_errno = 0;
2502
2503         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2504                                         smb_fname->base_name,
2505                                         &timestamp, &stripped)) {
2506                 goto done;
2507         }
2508         if (timestamp == 0) {
2509                 return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
2510         }
2511
2512         conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
2513         if (conv_smb_fname == NULL) {
2514                 goto done;
2515         }
2516         conv_smb_fname->base_name = snapper_gmt_convert(conv_smb_fname, handle,
2517                                               stripped, timestamp);
2518         if (conv_smb_fname->base_name == NULL) {
2519                 goto done;
2520         }
2521
2522         result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_smb_fname);
2523
2524 done:
2525         if (result_fname == NULL) {
2526                 saved_errno = errno;
2527         }
2528         TALLOC_FREE(conv_smb_fname);
2529         TALLOC_FREE(stripped);
2530         if (saved_errno != 0) {
2531                 errno = saved_errno;
2532         }
2533         return result_fname;
2534 }
2535
2536 static NTSTATUS snapper_gmt_fget_nt_acl(vfs_handle_struct *handle,
2537                                         struct files_struct *fsp,
2538                                         uint32_t security_info,
2539                                         TALLOC_CTX *mem_ctx,
2540                                         struct security_descriptor **ppdesc)
2541 {
2542         time_t timestamp;
2543         char *stripped;
2544         NTSTATUS status;
2545         char *conv;
2546         struct smb_filename *smb_fname = NULL;
2547
2548         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2549                                         fsp->fsp_name->base_name,
2550                                         &timestamp, &stripped)) {
2551                 return map_nt_error_from_unix(errno);
2552         }
2553         if (timestamp == 0) {
2554                 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
2555                                                 mem_ctx,
2556                                                 ppdesc);
2557         }
2558         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2559         TALLOC_FREE(stripped);
2560         if (conv == NULL) {
2561                 return map_nt_error_from_unix(errno);
2562         }
2563
2564         smb_fname = synthetic_smb_fname(talloc_tos(),
2565                                         conv,
2566                                         NULL,
2567                                         NULL,
2568                                         fsp->fsp_name->flags);
2569         TALLOC_FREE(conv);
2570         if (smb_fname == NULL) {
2571                 return NT_STATUS_NO_MEMORY;
2572         }
2573
2574         status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2575                                          mem_ctx, ppdesc);
2576         TALLOC_FREE(smb_fname);
2577         return status;
2578 }
2579
2580 static NTSTATUS snapper_gmt_get_nt_acl(vfs_handle_struct *handle,
2581                                        const struct smb_filename *fname,
2582                                        uint32_t security_info,
2583                                        TALLOC_CTX *mem_ctx,
2584                                        struct security_descriptor **ppdesc)
2585 {
2586         time_t timestamp;
2587         char *stripped;
2588         NTSTATUS status;
2589         char *conv;
2590         struct smb_filename *smb_fname = NULL;
2591
2592         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2593                                         &timestamp, &stripped)) {
2594                 return map_nt_error_from_unix(errno);
2595         }
2596         if (timestamp == 0) {
2597                 return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info,
2598                                                mem_ctx, ppdesc);
2599         }
2600         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2601         TALLOC_FREE(stripped);
2602         if (conv == NULL) {
2603                 return map_nt_error_from_unix(errno);
2604         }
2605         smb_fname = synthetic_smb_fname(talloc_tos(),
2606                                         conv,
2607                                         NULL,
2608                                         NULL,
2609                                         fname->flags);
2610         TALLOC_FREE(conv);
2611         if (smb_fname == NULL) {
2612                 return NT_STATUS_NO_MEMORY;
2613         }
2614
2615         status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2616                                          mem_ctx, ppdesc);
2617         TALLOC_FREE(smb_fname);
2618         return status;
2619 }
2620
2621 static int snapper_gmt_mkdir(vfs_handle_struct *handle,
2622                                 const struct smb_filename *fname,
2623                                 mode_t mode)
2624 {
2625         time_t timestamp;
2626         char *stripped;
2627         int ret, saved_errno;
2628         char *conv;
2629         struct smb_filename *smb_fname = NULL;
2630
2631         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2632                                         &timestamp, &stripped)) {
2633                 return -1;
2634         }
2635         if (timestamp == 0) {
2636                 return SMB_VFS_NEXT_MKDIR(handle, fname, mode);
2637         }
2638         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2639         TALLOC_FREE(stripped);
2640         if (conv == NULL) {
2641                 return -1;
2642         }
2643         smb_fname = synthetic_smb_fname(talloc_tos(),
2644                                         conv,
2645                                         NULL,
2646                                         NULL,
2647                                         fname->flags);
2648         TALLOC_FREE(conv);
2649         if (smb_fname == NULL) {
2650                 errno = ENOMEM;
2651                 return -1;
2652         }
2653
2654         ret = SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
2655         saved_errno = errno;
2656         TALLOC_FREE(smb_fname);
2657         errno = saved_errno;
2658         return ret;
2659 }
2660
2661 static int snapper_gmt_rmdir(vfs_handle_struct *handle,
2662                                 const struct smb_filename *fname)
2663 {
2664         time_t timestamp;
2665         char *stripped;
2666         int ret, saved_errno;
2667         char *conv;
2668         struct smb_filename *smb_fname = NULL;
2669
2670         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2671                                         &timestamp, &stripped)) {
2672                 return -1;
2673         }
2674         if (timestamp == 0) {
2675                 return SMB_VFS_NEXT_RMDIR(handle, fname);
2676         }
2677         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2678         TALLOC_FREE(stripped);
2679         if (conv == NULL) {
2680                 return -1;
2681         }
2682         smb_fname = synthetic_smb_fname(talloc_tos(),
2683                                         conv,
2684                                         NULL,
2685                                         NULL,
2686                                         fname->flags);
2687         TALLOC_FREE(conv);
2688         if (smb_fname == NULL) {
2689                 errno = ENOMEM;
2690                 return -1;
2691         }
2692         ret = SMB_VFS_NEXT_RMDIR(handle, smb_fname);
2693         saved_errno = errno;
2694         TALLOC_FREE(smb_fname);
2695         errno = saved_errno;
2696         return ret;
2697 }
2698
2699 static int snapper_gmt_chflags(vfs_handle_struct *handle,
2700                                 const struct smb_filename *smb_fname,
2701                                 unsigned int flags)
2702 {
2703         time_t timestamp = 0;
2704         char *stripped = NULL;
2705         int ret = -1;
2706         int saved_errno = 0;
2707         char *conv = NULL;
2708         struct smb_filename *conv_smb_fname = NULL;
2709
2710         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2711                                 smb_fname->base_name, &timestamp, &stripped)) {
2712                 return -1;
2713         }
2714         if (timestamp == 0) {
2715                 return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
2716         }
2717         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2718         TALLOC_FREE(stripped);
2719         if (conv == NULL) {
2720                 return -1;
2721         }
2722         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2723                                         conv,
2724                                         NULL,
2725                                         NULL,
2726                                         smb_fname->flags);
2727         TALLOC_FREE(conv);
2728         if (conv_smb_fname == NULL) {
2729                 errno = ENOMEM;
2730                 return -1;
2731         }
2732         ret = SMB_VFS_NEXT_CHFLAGS(handle, conv_smb_fname, flags);
2733         if (ret == -1) {
2734                 saved_errno = errno;
2735         }
2736         TALLOC_FREE(conv_smb_fname);
2737         if (saved_errno != 0) {
2738                 errno = saved_errno;
2739         }
2740         return ret;
2741 }
2742
2743 static ssize_t snapper_gmt_getxattr(vfs_handle_struct *handle,
2744                                 const struct smb_filename *smb_fname,
2745                                 const char *aname,
2746                                 void *value,
2747                                 size_t size)
2748 {
2749         time_t timestamp = 0;
2750         char *stripped = NULL;
2751         ssize_t ret;
2752         int saved_errno = 0;
2753         char *conv = NULL;
2754         struct smb_filename *conv_smb_fname = NULL;
2755
2756         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2757                                         handle,
2758                                         smb_fname->base_name,
2759                                         &timestamp,
2760                                         &stripped)) {
2761                 return -1;
2762         }
2763         if (timestamp == 0) {
2764                 return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, aname, value,
2765                                              size);
2766         }
2767         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2768         TALLOC_FREE(stripped);
2769         if (conv == NULL) {
2770                 return -1;
2771         }
2772         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2773                                         conv,
2774                                         NULL,
2775                                         NULL,
2776                                         smb_fname->flags);
2777         TALLOC_FREE(conv);
2778         if (conv_smb_fname == NULL) {
2779                 errno = ENOMEM;
2780                 return -1;
2781         }
2782         ret = SMB_VFS_NEXT_GETXATTR(handle, conv_smb_fname, aname, value, size);
2783         if (ret == -1) {
2784                 saved_errno = errno;
2785         }
2786         TALLOC_FREE(conv_smb_fname);
2787         TALLOC_FREE(conv);
2788         if (saved_errno != 0) {
2789                 errno = saved_errno;
2790         }
2791         return ret;
2792 }
2793
2794 static ssize_t snapper_gmt_listxattr(struct vfs_handle_struct *handle,
2795                                      const struct smb_filename *smb_fname,
2796                                      char *list, size_t size)
2797 {
2798         time_t timestamp = 0;
2799         char *stripped = NULL;
2800         ssize_t ret;
2801         int saved_errno = 0;
2802         char *conv = NULL;
2803         struct smb_filename *conv_smb_fname = NULL;
2804
2805         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2806                                         handle,
2807                                         smb_fname->base_name,
2808                                         &timestamp,
2809                                         &stripped)) {
2810                 return -1;
2811         }
2812         if (timestamp == 0) {
2813                 return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
2814         }
2815         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2816         TALLOC_FREE(stripped);
2817         if (conv == NULL) {
2818                 return -1;
2819         }
2820         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2821                                         conv,
2822                                         NULL,
2823                                         NULL,
2824                                         smb_fname->flags);
2825         TALLOC_FREE(conv);
2826         if (conv_smb_fname == NULL) {
2827                 errno = ENOMEM;
2828                 return -1;
2829         }
2830         ret = SMB_VFS_NEXT_LISTXATTR(handle, conv_smb_fname, list, size);
2831         if (ret == -1) {
2832                 saved_errno = errno;
2833         }
2834         TALLOC_FREE(conv_smb_fname);
2835         TALLOC_FREE(conv);
2836         if (saved_errno != 0) {
2837                 errno = saved_errno;
2838         }
2839         return ret;
2840 }
2841
2842 static int snapper_gmt_removexattr(vfs_handle_struct *handle,
2843                                 const struct smb_filename *smb_fname,
2844                                 const char *aname)
2845 {
2846         time_t timestamp = 0;
2847         char *stripped = NULL;
2848         ssize_t ret;
2849         int saved_errno = 0;
2850         char *conv = NULL;
2851         struct smb_filename *conv_smb_fname = NULL;
2852
2853         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2854                                         handle,
2855                                         smb_fname->base_name,
2856                                         &timestamp,
2857                                         &stripped)) {
2858                 return -1;
2859         }
2860         if (timestamp == 0) {
2861                 return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, aname);
2862         }
2863         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2864         TALLOC_FREE(stripped);
2865         if (conv == NULL) {
2866                 return -1;
2867         }
2868         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2869                                         conv,
2870                                         NULL,
2871                                         NULL,
2872                                         smb_fname->flags);
2873         TALLOC_FREE(conv);
2874         if (conv_smb_fname == NULL) {
2875                 errno = ENOMEM;
2876                 return -1;
2877         }
2878         ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv_smb_fname, aname);
2879         if (ret == -1) {
2880                 saved_errno = errno;
2881         }
2882         TALLOC_FREE(conv_smb_fname);
2883         TALLOC_FREE(conv);
2884         if (saved_errno != 0) {
2885                 errno = saved_errno;
2886         }
2887         return ret;
2888 }
2889
2890 static int snapper_gmt_setxattr(struct vfs_handle_struct *handle,
2891                                 const struct smb_filename *smb_fname,
2892                                 const char *aname, const void *value,
2893                                 size_t size, int flags)
2894 {
2895         time_t timestamp = 0;
2896         char *stripped = NULL;
2897         ssize_t ret;
2898         int saved_errno = 0;
2899         char *conv = NULL;
2900         struct smb_filename *conv_smb_fname = NULL;
2901
2902         if (!snapper_gmt_strip_snapshot(talloc_tos(),
2903                                         handle,
2904                                         smb_fname->base_name,
2905                                         &timestamp,
2906                                         &stripped)) {
2907                 return -1;
2908         }
2909         if (timestamp == 0) {
2910                 return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
2911                                         aname, value, size, flags);
2912         }
2913         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2914         TALLOC_FREE(stripped);
2915         if (conv == NULL) {
2916                 return -1;
2917         }
2918         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2919                                         conv,
2920                                         NULL,
2921                                         NULL,
2922                                         smb_fname->flags);
2923         TALLOC_FREE(conv);
2924         if (conv_smb_fname == NULL) {
2925                 errno = ENOMEM;
2926                 return -1;
2927         }
2928         ret = SMB_VFS_NEXT_SETXATTR(handle, conv_smb_fname,
2929                                 aname, value, size, flags);
2930         if (ret == -1) {
2931                 saved_errno = errno;
2932         }
2933         TALLOC_FREE(conv_smb_fname);
2934         TALLOC_FREE(conv);
2935         if (saved_errno != 0) {
2936                 errno = saved_errno;
2937         }
2938         return ret;
2939 }
2940
2941 static int snapper_gmt_get_real_filename(struct vfs_handle_struct *handle,
2942                                          const char *path,
2943                                          const char *name,
2944                                          TALLOC_CTX *mem_ctx,
2945                                          char **found_name)
2946 {
2947         time_t timestamp;
2948         char *stripped;
2949         ssize_t ret;
2950         int saved_errno;
2951         char *conv;
2952
2953         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path,
2954                                         &timestamp, &stripped)) {
2955                 return -1;
2956         }
2957         if (timestamp == 0) {
2958                 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
2959                                                       mem_ctx, found_name);
2960         }
2961         if (stripped[0] == '\0') {
2962                 *found_name = talloc_strdup(mem_ctx, name);
2963                 if (*found_name == NULL) {
2964                         errno = ENOMEM;
2965                         return -1;
2966                 }
2967                 return 0;
2968         }
2969         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2970         TALLOC_FREE(stripped);
2971         if (conv == NULL) {
2972                 return -1;
2973         }
2974         ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
2975                                              mem_ctx, found_name);
2976         saved_errno = errno;
2977         TALLOC_FREE(conv);
2978         errno = saved_errno;
2979         return ret;
2980 }
2981
2982 static uint64_t snapper_gmt_disk_free(vfs_handle_struct *handle,
2983                                 const struct smb_filename *smb_fname,
2984                                 uint64_t *bsize,
2985                                 uint64_t *dfree,
2986                                 uint64_t *dsize)
2987 {
2988         time_t timestamp = 0;
2989         char *stripped = NULL;
2990         uint64_t ret;
2991         int saved_errno = 0;
2992         char *conv = NULL;
2993         struct smb_filename *conv_smb_fname = NULL;
2994
2995         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2996                         smb_fname->base_name, &timestamp, &stripped)) {
2997                 return (uint64_t)-1;
2998         }
2999         if (timestamp == 0) {
3000                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
3001                                               bsize, dfree, dsize);
3002         }
3003
3004         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
3005         TALLOC_FREE(stripped);
3006         if (conv == NULL) {
3007                 return (uint64_t)-1;
3008         }
3009         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
3010                                         conv,
3011                                         NULL,
3012                                         NULL,
3013                                         smb_fname->flags);
3014         if (conv_smb_fname == NULL) {
3015                 TALLOC_FREE(conv);
3016                 errno = ENOMEM;
3017                 return (uint64_t)-1;
3018         }
3019
3020         ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
3021                                 bsize, dfree, dsize);
3022
3023         if (ret == (uint64_t)-1) {
3024                 saved_errno = errno;
3025         }
3026         TALLOC_FREE(conv_smb_fname);
3027         if (saved_errno != 0) {
3028                 errno = saved_errno;
3029         }
3030         return ret;
3031 }
3032
3033 static int snapper_gmt_get_quota(vfs_handle_struct *handle,
3034                         const struct smb_filename *smb_fname,
3035                         enum SMB_QUOTA_TYPE qtype,
3036                         unid_t id,
3037                         SMB_DISK_QUOTA *dq)
3038 {
3039         time_t timestamp = 0;
3040         char *stripped = NULL;
3041         int ret;
3042         int saved_errno = 0;
3043         char *conv = NULL;
3044         struct smb_filename *conv_smb_fname = NULL;
3045
3046         if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
3047                                 smb_fname->base_name, &timestamp, &stripped)) {
3048                 return -1;
3049         }
3050         if (timestamp == 0) {
3051                 return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
3052         }
3053
3054         conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
3055         TALLOC_FREE(stripped);
3056         if (conv == NULL) {
3057                 return -1;
3058         }
3059         conv_smb_fname = synthetic_smb_fname(talloc_tos(),
3060                                         conv,
3061                                         NULL,
3062                                         NULL,
3063                                         smb_fname->flags);
3064         TALLOC_FREE(conv);
3065         if (conv_smb_fname == NULL) {
3066                 errno = ENOMEM;
3067                 return -1;
3068         }
3069
3070         ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
3071
3072         if (ret == -1) {
3073                 saved_errno = errno;
3074         }
3075         TALLOC_FREE(conv_smb_fname);
3076         if (saved_errno != 0) {
3077                 errno = saved_errno;
3078         }
3079         return ret;
3080 }
3081
3082
3083 static struct vfs_fn_pointers snapper_fns = {
3084         .snap_check_path_fn = snapper_snap_check_path,
3085         .snap_create_fn = snapper_snap_create,
3086         .snap_delete_fn = snapper_snap_delete,
3087         .get_shadow_copy_data_fn = snapper_get_shadow_copy_data,
3088         .opendir_fn = snapper_gmt_opendir,
3089         .disk_free_fn = snapper_gmt_disk_free,
3090         .get_quota_fn = snapper_gmt_get_quota,
3091         .rename_fn = snapper_gmt_rename,
3092         .link_fn = snapper_gmt_link,
3093         .symlink_fn = snapper_gmt_symlink,
3094         .stat_fn = snapper_gmt_stat,
3095         .lstat_fn = snapper_gmt_lstat,
3096         .open_fn = snapper_gmt_open,
3097         .unlink_fn = snapper_gmt_unlink,
3098         .chmod_fn = snapper_gmt_chmod,
3099         .chown_fn = snapper_gmt_chown,
3100         .chdir_fn = snapper_gmt_chdir,
3101         .ntimes_fn = snapper_gmt_ntimes,
3102         .readlink_fn = snapper_gmt_readlink,
3103         .mknod_fn = snapper_gmt_mknod,
3104         .realpath_fn = snapper_gmt_realpath,
3105         .get_nt_acl_fn = snapper_gmt_get_nt_acl,
3106         .fget_nt_acl_fn = snapper_gmt_fget_nt_acl,
3107         .mkdir_fn = snapper_gmt_mkdir,
3108         .rmdir_fn = snapper_gmt_rmdir,
3109         .getxattr_fn = snapper_gmt_getxattr,
3110         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
3111         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
3112         .listxattr_fn = snapper_gmt_listxattr,
3113         .removexattr_fn = snapper_gmt_removexattr,
3114         .setxattr_fn = snapper_gmt_setxattr,
3115         .chflags_fn = snapper_gmt_chflags,
3116         .get_real_filename_fn = snapper_gmt_get_real_filename,
3117 };
3118
3119 static_decl_vfs;
3120 NTSTATUS vfs_snapper_init(TALLOC_CTX *ctx)
3121 {
3122         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3123                                 "snapper", &snapper_fns);
3124 }