wc_db_wcroot.c revision 269847
1/* 2 * wc_db_wcroot.c : supporting datastructures for the administrative database 3 * 4 * ==================================================================== 5 * Licensed to the Apache Software Foundation (ASF) under one 6 * or more contributor license agreements. See the NOTICE file 7 * distributed with this work for additional information 8 * regarding copyright ownership. The ASF licenses this file 9 * to you under the Apache License, Version 2.0 (the 10 * "License"); you may not use this file except in compliance 11 * with the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, 16 * software distributed under the License is distributed on an 17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18 * KIND, either express or implied. See the License for the 19 * specific language governing permissions and limitations 20 * under the License. 21 * ==================================================================== 22 */ 23 24#define SVN_WC__I_AM_WC_DB 25 26#include <assert.h> 27 28#include "svn_dirent_uri.h" 29#include "svn_hash.h" 30#include "svn_path.h" 31#include "svn_version.h" 32 33#include "wc.h" 34#include "adm_files.h" 35#include "wc_db_private.h" 36#include "wc-queries.h" 37 38#include "svn_private_config.h" 39 40/* ### Same values as wc_db.c */ 41#define SDB_FILE "wc.db" 42#define UNKNOWN_WC_ID ((apr_int64_t) -1) 43#define FORMAT_FROM_SDB (-1) 44 45 46 47/* Get the format version from a wc-1 directory. If it is not a working copy 48 directory, then it sets VERSION to zero and returns no error. */ 49static svn_error_t * 50get_old_version(int *version, 51 const char *abspath, 52 apr_pool_t *scratch_pool) 53{ 54 svn_error_t *err; 55 const char *format_file_path; 56 svn_node_kind_t kind; 57 58 /* Try reading the format number from the entries file. */ 59 format_file_path = svn_wc__adm_child(abspath, SVN_WC__ADM_ENTRIES, 60 scratch_pool); 61 62 /* Since trying to open a non-existent file is quite expensive, try a 63 quick stat call first. In wc-ng w/cs, this will be an early exit. */ 64 SVN_ERR(svn_io_check_path(format_file_path, &kind, scratch_pool)); 65 if (kind == svn_node_none) 66 { 67 *version = 0; 68 return SVN_NO_ERROR; 69 } 70 71 err = svn_io_read_version_file(version, format_file_path, scratch_pool); 72 if (err == NULL) 73 return SVN_NO_ERROR; 74 if (err->apr_err != SVN_ERR_BAD_VERSION_FILE_FORMAT 75 && !APR_STATUS_IS_ENOENT(err->apr_err) 76 && !APR_STATUS_IS_ENOTDIR(err->apr_err)) 77 return svn_error_createf(SVN_ERR_WC_MISSING, err, _("'%s' does not exist"), 78 svn_dirent_local_style(abspath, scratch_pool)); 79 svn_error_clear(err); 80 81 /* This must be a really old working copy! Fall back to reading the 82 format file. 83 84 Note that the format file might not exist in newer working copies 85 (format 7 and higher), but in that case, the entries file should 86 have contained the format number. */ 87 format_file_path = svn_wc__adm_child(abspath, SVN_WC__ADM_FORMAT, 88 scratch_pool); 89 err = svn_io_read_version_file(version, format_file_path, scratch_pool); 90 if (err == NULL) 91 return SVN_NO_ERROR; 92 93 /* Whatever error may have occurred... we can just ignore. This is not 94 a working copy directory. Signal the caller. */ 95 svn_error_clear(err); 96 97 *version = 0; 98 return SVN_NO_ERROR; 99} 100 101 102/* A helper function to parse_local_abspath() which returns the on-disk KIND 103 of LOCAL_ABSPATH, using DB and SCRATCH_POOL as needed. 104 105 This function may do strange things, but at long as it comes up with the 106 Right Answer, we should be happy. */ 107static svn_error_t * 108get_path_kind(svn_node_kind_t *kind, 109 svn_wc__db_t *db, 110 const char *local_abspath, 111 apr_pool_t *scratch_pool) 112{ 113 svn_boolean_t special; 114 svn_node_kind_t node_kind; 115 116 /* This implements a *really* simple LRU cache, where "simple" is defined 117 as "only one element". In other words, we remember the most recently 118 queried path, and nothing else. This gives >80% cache hits. */ 119 120 if (db->parse_cache.abspath 121 && strcmp(db->parse_cache.abspath->data, local_abspath) == 0) 122 { 123 /* Cache hit! */ 124 *kind = db->parse_cache.kind; 125 return SVN_NO_ERROR; 126 } 127 128 if (!db->parse_cache.abspath) 129 { 130 db->parse_cache.abspath = svn_stringbuf_create(local_abspath, 131 db->state_pool); 132 } 133 else 134 { 135 svn_stringbuf_set(db->parse_cache.abspath, local_abspath); 136 } 137 138 SVN_ERR(svn_io_check_special_path(local_abspath, &node_kind, 139 &special, scratch_pool)); 140 141 db->parse_cache.kind = (special ? svn_node_symlink : node_kind); 142 *kind = db->parse_cache.kind; 143 144 return SVN_NO_ERROR; 145} 146 147 148/* Return an error if the work queue in SDB is non-empty. */ 149static svn_error_t * 150verify_no_work(svn_sqlite__db_t *sdb) 151{ 152 svn_sqlite__stmt_t *stmt; 153 svn_boolean_t have_row; 154 155 SVN_ERR(svn_sqlite__get_statement(&stmt, sdb, STMT_LOOK_FOR_WORK)); 156 SVN_ERR(svn_sqlite__step(&have_row, stmt)); 157 SVN_ERR(svn_sqlite__reset(stmt)); 158 159 if (have_row) 160 return svn_error_create(SVN_ERR_WC_CLEANUP_REQUIRED, NULL, 161 NULL /* nothing to add. */); 162 163 return SVN_NO_ERROR; 164} 165 166 167/* */ 168static apr_status_t 169close_wcroot(void *data) 170{ 171 svn_wc__db_wcroot_t *wcroot = data; 172 svn_error_t *err; 173 174 SVN_ERR_ASSERT_NO_RETURN(wcroot->sdb != NULL); 175 176 err = svn_sqlite__close(wcroot->sdb); 177 wcroot->sdb = NULL; 178 if (err) 179 { 180 apr_status_t result = err->apr_err; 181 svn_error_clear(err); 182 return result; 183 } 184 185 return APR_SUCCESS; 186} 187 188 189svn_error_t * 190svn_wc__db_open(svn_wc__db_t **db, 191 svn_config_t *config, 192 svn_boolean_t open_without_upgrade, 193 svn_boolean_t enforce_empty_wq, 194 apr_pool_t *result_pool, 195 apr_pool_t *scratch_pool) 196{ 197 *db = apr_pcalloc(result_pool, sizeof(**db)); 198 (*db)->config = config; 199 (*db)->verify_format = !open_without_upgrade; 200 (*db)->enforce_empty_wq = enforce_empty_wq; 201 (*db)->dir_data = apr_hash_make(result_pool); 202 203 (*db)->state_pool = result_pool; 204 205 /* Don't need to initialize (*db)->parse_cache, due to the calloc above */ 206 if (config) 207 { 208 svn_error_t *err; 209 svn_boolean_t sqlite_exclusive = FALSE; 210 211 err = svn_config_get_bool(config, &sqlite_exclusive, 212 SVN_CONFIG_SECTION_WORKING_COPY, 213 SVN_CONFIG_OPTION_SQLITE_EXCLUSIVE, 214 FALSE); 215 if (err) 216 { 217 svn_error_clear(err); 218 } 219 else 220 (*db)->exclusive = sqlite_exclusive; 221 } 222 223 return SVN_NO_ERROR; 224} 225 226 227svn_error_t * 228svn_wc__db_close(svn_wc__db_t *db) 229{ 230 apr_pool_t *scratch_pool = db->state_pool; 231 apr_hash_t *roots = apr_hash_make(scratch_pool); 232 apr_hash_index_t *hi; 233 234 /* Collect all the unique WCROOT structures, and empty out DIR_DATA. */ 235 for (hi = apr_hash_first(scratch_pool, db->dir_data); 236 hi; 237 hi = apr_hash_next(hi)) 238 { 239 svn_wc__db_wcroot_t *wcroot = svn__apr_hash_index_val(hi); 240 const char *local_abspath = svn__apr_hash_index_key(hi); 241 242 if (wcroot->sdb) 243 svn_hash_sets(roots, wcroot->abspath, wcroot); 244 245 svn_hash_sets(db->dir_data, local_abspath, NULL); 246 } 247 248 /* Run the cleanup for each WCROOT. */ 249 return svn_error_trace(svn_wc__db_close_many_wcroots(roots, db->state_pool, 250 scratch_pool)); 251} 252 253 254svn_error_t * 255svn_wc__db_pdh_create_wcroot(svn_wc__db_wcroot_t **wcroot, 256 const char *wcroot_abspath, 257 svn_sqlite__db_t *sdb, 258 apr_int64_t wc_id, 259 int format, 260 svn_boolean_t verify_format, 261 svn_boolean_t enforce_empty_wq, 262 apr_pool_t *result_pool, 263 apr_pool_t *scratch_pool) 264{ 265 if (sdb != NULL) 266 SVN_ERR(svn_sqlite__read_schema_version(&format, sdb, scratch_pool)); 267 268 /* If we construct a wcroot, then we better have a format. */ 269 SVN_ERR_ASSERT(format >= 1); 270 271 /* If this working copy is PRE-1.0, then simply bail out. */ 272 if (format < 4) 273 { 274 return svn_error_createf( 275 SVN_ERR_WC_UNSUPPORTED_FORMAT, NULL, 276 _("Working copy format of '%s' is too old (%d); " 277 "please check out your working copy again"), 278 svn_dirent_local_style(wcroot_abspath, scratch_pool), format); 279 } 280 281 /* If this working copy is from a future version, then bail out. */ 282 if (format > SVN_WC__VERSION) 283 { 284 return svn_error_createf( 285 SVN_ERR_WC_UNSUPPORTED_FORMAT, NULL, 286 _("This client is too old to work with the working copy at\n" 287 "'%s' (format %d).\n" 288 "You need to get a newer Subversion client. For more details, see\n" 289 " http://subversion.apache.org/faq.html#working-copy-format-change\n" 290 ), 291 svn_dirent_local_style(wcroot_abspath, scratch_pool), 292 format); 293 } 294 295 /* Verify that no work items exists. If they do, then our integrity is 296 suspect and, thus, we cannot use this database. */ 297 if (format >= SVN_WC__HAS_WORK_QUEUE 298 && (enforce_empty_wq || (format < SVN_WC__VERSION && verify_format))) 299 { 300 svn_error_t *err = verify_no_work(sdb); 301 if (err) 302 { 303 /* Special message for attempts to upgrade a 1.7-dev wc with 304 outstanding workqueue items. */ 305 if (err->apr_err == SVN_ERR_WC_CLEANUP_REQUIRED 306 && format < SVN_WC__VERSION && verify_format) 307 err = svn_error_quick_wrap(err, _("Cleanup with an older 1.7 " 308 "client before upgrading with " 309 "this client")); 310 return svn_error_trace(err); 311 } 312 } 313 314 /* Auto-upgrade the SDB if possible. */ 315 if (format < SVN_WC__VERSION && verify_format) 316 { 317 return svn_error_createf(SVN_ERR_WC_UPGRADE_REQUIRED, NULL, 318 _("The working copy at '%s'\nis too old " 319 "(format %d) to work with client version " 320 "'%s' (expects format %d). You need to " 321 "upgrade the working copy first.\n"), 322 svn_dirent_local_style(wcroot_abspath, 323 scratch_pool), 324 format, SVN_VERSION, SVN_WC__VERSION); 325 } 326 327 *wcroot = apr_palloc(result_pool, sizeof(**wcroot)); 328 329 (*wcroot)->abspath = wcroot_abspath; 330 (*wcroot)->sdb = sdb; 331 (*wcroot)->wc_id = wc_id; 332 (*wcroot)->format = format; 333 /* 8 concurrent locks is probably more than a typical wc_ng based svn client 334 uses. */ 335 (*wcroot)->owned_locks = apr_array_make(result_pool, 8, 336 sizeof(svn_wc__db_wclock_t)); 337 (*wcroot)->access_cache = apr_hash_make(result_pool); 338 339 /* SDB will be NULL for pre-NG working copies. We only need to run a 340 cleanup when the SDB is present. */ 341 if (sdb != NULL) 342 apr_pool_cleanup_register(result_pool, *wcroot, close_wcroot, 343 apr_pool_cleanup_null); 344 return SVN_NO_ERROR; 345} 346 347 348svn_error_t * 349svn_wc__db_close_many_wcroots(apr_hash_t *roots, 350 apr_pool_t *state_pool, 351 apr_pool_t *scratch_pool) 352{ 353 apr_hash_index_t *hi; 354 355 for (hi = apr_hash_first(scratch_pool, roots); hi; hi = apr_hash_next(hi)) 356 { 357 svn_wc__db_wcroot_t *wcroot = svn__apr_hash_index_val(hi); 358 apr_status_t result; 359 360 result = apr_pool_cleanup_run(state_pool, wcroot, close_wcroot); 361 if (result != APR_SUCCESS) 362 return svn_error_wrap_apr(result, NULL); 363 } 364 365 return SVN_NO_ERROR; 366} 367 368 369/* POOL may be NULL if the lifetime of LOCAL_ABSPATH is sufficient. */ 370static const char * 371compute_relpath(const svn_wc__db_wcroot_t *wcroot, 372 const char *local_abspath, 373 apr_pool_t *result_pool) 374{ 375 const char *relpath = svn_dirent_is_child(wcroot->abspath, local_abspath, 376 result_pool); 377 if (relpath == NULL) 378 return ""; 379 return relpath; 380} 381 382 383/* Return in *LINK_TARGET_ABSPATH the absolute path the symlink at 384 * LOCAL_ABSPATH is pointing to. Perform all allocations in POOL. */ 385static svn_error_t * 386read_link_target(const char **link_target_abspath, 387 const char *local_abspath, 388 apr_pool_t *pool) 389{ 390 svn_string_t *link_target; 391 const char *canon_link_target; 392 393 SVN_ERR(svn_io_read_link(&link_target, local_abspath, pool)); 394 if (link_target->len == 0) 395 return svn_error_createf(SVN_ERR_WC_NOT_SYMLINK, NULL, 396 _("The symlink at '%s' points nowhere"), 397 svn_dirent_local_style(local_abspath, pool)); 398 399 canon_link_target = svn_dirent_canonicalize(link_target->data, pool); 400 401 /* Treat relative symlinks as relative to LOCAL_ABSPATH's parent. */ 402 if (!svn_dirent_is_absolute(canon_link_target)) 403 canon_link_target = svn_dirent_join(svn_dirent_dirname(local_abspath, 404 pool), 405 canon_link_target, pool); 406 407 /* Collapse any .. in the symlink part of the path. */ 408 if (svn_path_is_backpath_present(canon_link_target)) 409 SVN_ERR(svn_dirent_get_absolute(link_target_abspath, canon_link_target, 410 pool)); 411 else 412 *link_target_abspath = canon_link_target; 413 414 return SVN_NO_ERROR; 415} 416 417svn_error_t * 418svn_wc__db_wcroot_parse_local_abspath(svn_wc__db_wcroot_t **wcroot, 419 const char **local_relpath, 420 svn_wc__db_t *db, 421 const char *local_abspath, 422 apr_pool_t *result_pool, 423 apr_pool_t *scratch_pool) 424{ 425 const char *local_dir_abspath; 426 const char *original_abspath = local_abspath; 427 svn_node_kind_t kind; 428 const char *build_relpath; 429 svn_wc__db_wcroot_t *probe_wcroot; 430 svn_wc__db_wcroot_t *found_wcroot = NULL; 431 const char *scan_abspath; 432 svn_sqlite__db_t *sdb = NULL; 433 svn_boolean_t moved_upwards = FALSE; 434 svn_boolean_t always_check = FALSE; 435 int wc_format = 0; 436 const char *adm_relpath; 437 /* Non-NULL if WCROOT is found through a symlink: */ 438 const char *symlink_wcroot_abspath = NULL; 439 440 /* ### we need more logic for finding the database (if it is located 441 ### outside of the wcroot) and then managing all of that within DB. 442 ### for now: play quick & dirty. */ 443 444 probe_wcroot = svn_hash_gets(db->dir_data, local_abspath); 445 if (probe_wcroot != NULL) 446 { 447 *wcroot = probe_wcroot; 448 449 /* We got lucky. Just return the thing BEFORE performing any I/O. */ 450 /* ### validate SMODE against how we opened wcroot->sdb? and against 451 ### DB->mode? (will we record per-dir mode?) */ 452 453 /* ### for most callers, we could pass NULL for result_pool. */ 454 *local_relpath = compute_relpath(probe_wcroot, local_abspath, 455 result_pool); 456 457 return SVN_NO_ERROR; 458 } 459 460 /* ### at some point in the future, we may need to find a way to get 461 ### rid of this stat() call. it is going to happen for EVERY call 462 ### into wc_db which references a file. calls for directories could 463 ### get an early-exit in the hash lookup just above. */ 464 SVN_ERR(get_path_kind(&kind, db, local_abspath, scratch_pool)); 465 if (kind != svn_node_dir) 466 { 467 /* If the node specified by the path is NOT present, then it cannot 468 possibly be a directory containing ".svn/wc.db". 469 470 If it is a file, then it cannot contain ".svn/wc.db". 471 472 For both of these cases, strip the basename off of the path and 473 move up one level. Keep record of what we strip, though, since 474 we'll need it later to construct local_relpath. */ 475 svn_dirent_split(&local_dir_abspath, &build_relpath, local_abspath, 476 scratch_pool); 477 478 /* Is this directory in our hash? */ 479 probe_wcroot = svn_hash_gets(db->dir_data, local_dir_abspath); 480 if (probe_wcroot != NULL) 481 { 482 const char *dir_relpath; 483 484 *wcroot = probe_wcroot; 485 486 /* Stashed directory's local_relpath + basename. */ 487 dir_relpath = compute_relpath(probe_wcroot, local_dir_abspath, 488 NULL); 489 *local_relpath = svn_relpath_join(dir_relpath, 490 build_relpath, 491 result_pool); 492 return SVN_NO_ERROR; 493 } 494 495 /* If the requested path is not on the disk, then we don't know how 496 many ancestors need to be scanned until we start hitting content 497 on the disk. Set ALWAYS_CHECK to keep looking for .svn/entries 498 rather than bailing out after the first check. */ 499 if (kind == svn_node_none) 500 always_check = TRUE; 501 502 /* Start the scanning at LOCAL_DIR_ABSPATH. */ 503 local_abspath = local_dir_abspath; 504 } 505 else 506 { 507 /* Start the local_relpath empty. If *this* directory contains the 508 wc.db, then relpath will be the empty string. */ 509 build_relpath = ""; 510 511 /* Remember the dir containing LOCAL_ABSPATH (they're the same). */ 512 local_dir_abspath = local_abspath; 513 } 514 515 /* LOCAL_ABSPATH refers to a directory at this point. At this point, 516 we've determined that an associated WCROOT is NOT in the DB's hash 517 table for this directory. Let's find an existing one in the ancestors, 518 or create one when we find the actual wcroot. */ 519 520 /* Assume that LOCAL_ABSPATH is a directory, and look for the SQLite 521 database in the right place. If we find it... great! If not, then 522 peel off some components, and try again. */ 523 524 adm_relpath = svn_wc_get_adm_dir(scratch_pool); 525 while (TRUE) 526 { 527 svn_error_t *err; 528 svn_node_kind_t adm_subdir_kind; 529 530 const char *adm_subdir = svn_dirent_join(local_abspath, adm_relpath, 531 scratch_pool); 532 533 SVN_ERR(svn_io_check_path(adm_subdir, &adm_subdir_kind, scratch_pool)); 534 535 if (adm_subdir_kind == svn_node_dir) 536 { 537 /* We always open the database in read/write mode. If the database 538 isn't writable in the filesystem, SQLite will internally open 539 it as read-only, and we'll get an error if we try to do a write 540 operation. 541 542 We could decide what to do on a per-operation basis, but since 543 we're caching database handles, it make sense to be as permissive 544 as the filesystem allows. */ 545 err = svn_wc__db_util_open_db(&sdb, local_abspath, SDB_FILE, 546 svn_sqlite__mode_readwrite, 547 db->exclusive, NULL, 548 db->state_pool, scratch_pool); 549 if (err == NULL) 550 { 551#ifdef SVN_DEBUG 552 /* Install self-verification trigger statements. */ 553 err = svn_sqlite__exec_statements(sdb, 554 STMT_VERIFICATION_TRIGGERS); 555 if (err && err->apr_err == SVN_ERR_SQLITE_ERROR) 556 { 557 /* Verification triggers can fail to install on old 1.7-dev 558 * formats which didn't have a NODES table yet. Ignore sqlite 559 * errors so such working copies can be upgraded. */ 560 svn_error_clear(err); 561 } 562 else 563 SVN_ERR(err); 564#endif 565 break; 566 } 567 if (err->apr_err != SVN_ERR_SQLITE_ERROR 568 && !APR_STATUS_IS_ENOENT(err->apr_err)) 569 return svn_error_trace(err); 570 svn_error_clear(err); 571 572 /* If we have not moved upwards, then check for a wc-1 working copy. 573 Since wc-1 has a .svn in every directory, and we didn't find one 574 in the original directory, then we aren't looking at a wc-1. 575 576 If the original path is not present, then we have to check on every 577 iteration. The content may be the immediate parent, or possibly 578 five ancetors higher. We don't test for directory presence (just 579 for the presence of subdirs/files), so we don't know when we can 580 stop checking ... so just check always. */ 581 if (!moved_upwards || always_check) 582 { 583 SVN_ERR(get_old_version(&wc_format, local_abspath, 584 scratch_pool)); 585 if (wc_format != 0) 586 break; 587 } 588 } 589 590 /* We couldn't open the SDB within the specified directory, so 591 move up one more directory. */ 592 if (svn_dirent_is_root(local_abspath, strlen(local_abspath))) 593 { 594 /* Hit the root without finding a wcroot. */ 595 596 /* The wcroot could be a symlink to a directory. 597 * (Issue #2557, #3987). If so, try again, this time scanning 598 * for a db within the directory the symlink points to, 599 * rather than within the symlink's parent directory. */ 600 if (kind == svn_node_symlink) 601 { 602 svn_node_kind_t resolved_kind; 603 604 local_abspath = original_abspath; 605 606 SVN_ERR(svn_io_check_resolved_path(local_abspath, 607 &resolved_kind, 608 scratch_pool)); 609 if (resolved_kind == svn_node_dir) 610 { 611 /* Is this directory recorded in our hash? */ 612 found_wcroot = svn_hash_gets(db->dir_data, local_abspath); 613 if (found_wcroot) 614 break; 615 616 symlink_wcroot_abspath = local_abspath; 617 SVN_ERR(read_link_target(&local_abspath, local_abspath, 618 scratch_pool)); 619try_symlink_as_dir: 620 kind = svn_node_dir; 621 moved_upwards = FALSE; 622 local_dir_abspath = local_abspath; 623 build_relpath = ""; 624 625 continue; 626 } 627 } 628 629 return svn_error_createf(SVN_ERR_WC_NOT_WORKING_COPY, NULL, 630 _("'%s' is not a working copy"), 631 svn_dirent_local_style(original_abspath, 632 scratch_pool)); 633 } 634 635 local_abspath = svn_dirent_dirname(local_abspath, scratch_pool); 636 637 moved_upwards = TRUE; 638 symlink_wcroot_abspath = NULL; 639 640 /* Is the parent directory recorded in our hash? */ 641 found_wcroot = svn_hash_gets(db->dir_data, local_abspath); 642 if (found_wcroot != NULL) 643 break; 644 } 645 646 if (found_wcroot != NULL) 647 { 648 /* We found a hash table entry for an ancestor, so we stopped scanning 649 since all subdirectories use the same WCROOT. */ 650 *wcroot = found_wcroot; 651 } 652 else if (wc_format == 0) 653 { 654 /* We finally found the database. Construct a wcroot_t for it. */ 655 656 apr_int64_t wc_id; 657 svn_error_t *err; 658 659 err = svn_wc__db_util_fetch_wc_id(&wc_id, sdb, scratch_pool); 660 if (err) 661 { 662 if (err->apr_err == SVN_ERR_WC_CORRUPT) 663 return svn_error_quick_wrap( 664 err, apr_psprintf(scratch_pool, 665 _("Missing a row in WCROOT for '%s'."), 666 svn_dirent_local_style(original_abspath, 667 scratch_pool))); 668 return svn_error_trace(err); 669 } 670 671 /* WCROOT.local_abspath may be NULL when the database is stored 672 inside the wcroot, but we know the abspath is this directory 673 (ie. where we found it). */ 674 675 err = svn_wc__db_pdh_create_wcroot(wcroot, 676 apr_pstrdup(db->state_pool, 677 symlink_wcroot_abspath 678 ? symlink_wcroot_abspath 679 : local_abspath), 680 sdb, wc_id, FORMAT_FROM_SDB, 681 db->verify_format, db->enforce_empty_wq, 682 db->state_pool, scratch_pool); 683 if (err && (err->apr_err == SVN_ERR_WC_UNSUPPORTED_FORMAT || 684 err->apr_err == SVN_ERR_WC_UPGRADE_REQUIRED) && 685 kind == svn_node_symlink) 686 { 687 /* We found an unsupported WC after traversing upwards from a 688 * symlink. Fall through to code below to check if the symlink 689 * points at a supported WC. */ 690 svn_error_clear(err); 691 *wcroot = NULL; 692 } 693 else if (err) 694 { 695 /* Close handle if we are not going to use it to support 696 upgrading with exclusive wc locking. */ 697 return svn_error_compose_create(err, svn_sqlite__close(sdb)); 698 } 699 } 700 else 701 { 702 /* We found something that looks like a wc-1 working copy directory. 703 However, if the format version is 12 and the .svn/entries file 704 is only 3 bytes long, then it's a breadcrumb in a wc-ng working 705 copy that's missing an .svn/wc.db, or its .svn/wc.db is corrupt. */ 706 if (wc_format == SVN_WC__WC_NG_VERSION /* 12 */) 707 { 708 apr_finfo_t info; 709 710 /* Check attributes of .svn/entries */ 711 const char *admin_abspath = svn_wc__adm_child( 712 local_abspath, SVN_WC__ADM_ENTRIES, scratch_pool); 713 svn_error_t *err = svn_io_stat(&info, admin_abspath, APR_FINFO_SIZE, 714 scratch_pool); 715 716 /* If the former does not succeed, something is seriously wrong. */ 717 if (err) 718 return svn_error_createf( 719 SVN_ERR_WC_CORRUPT, err, 720 _("The working copy at '%s' is corrupt."), 721 svn_dirent_local_style(local_abspath, scratch_pool)); 722 svn_error_clear(err); 723 724 if (3 == info.size) 725 { 726 /* Check existence of .svn/wc.db */ 727 admin_abspath = svn_wc__adm_child(local_abspath, SDB_FILE, 728 scratch_pool); 729 err = svn_io_stat(&info, admin_abspath, APR_FINFO_SIZE, 730 scratch_pool); 731 if (err && APR_STATUS_IS_ENOENT(err->apr_err)) 732 { 733 svn_error_clear(err); 734 return svn_error_createf( 735 SVN_ERR_WC_CORRUPT, NULL, 736 _("The working copy database at '%s' is missing."), 737 svn_dirent_local_style(local_abspath, scratch_pool)); 738 } 739 else 740 /* We should never have reached this point in the code 741 if .svn/wc.db exists; therefore it's best to assume 742 it's corrupt. */ 743 return svn_error_createf( 744 SVN_ERR_WC_CORRUPT, err, 745 _("The working copy database at '%s' is corrupt."), 746 svn_dirent_local_style(local_abspath, scratch_pool)); 747 } 748 } 749 750 SVN_ERR(svn_wc__db_pdh_create_wcroot(wcroot, 751 apr_pstrdup(db->state_pool, 752 symlink_wcroot_abspath 753 ? symlink_wcroot_abspath 754 : local_abspath), 755 NULL, UNKNOWN_WC_ID, wc_format, 756 db->verify_format, db->enforce_empty_wq, 757 db->state_pool, scratch_pool)); 758 } 759 760 if (*wcroot) 761 { 762 const char *dir_relpath; 763 764 if (symlink_wcroot_abspath) 765 { 766 /* The WCROOT was found through a symlink pointing at the root of 767 * the WC. Cache the WCROOT under the symlink's path. */ 768 local_dir_abspath = symlink_wcroot_abspath; 769 } 770 771 /* The subdirectory's relpath is easily computed relative to the 772 wcroot that we just found. */ 773 dir_relpath = compute_relpath(*wcroot, local_dir_abspath, NULL); 774 775 /* And the result local_relpath may include a filename. */ 776 *local_relpath = svn_relpath_join(dir_relpath, build_relpath, result_pool); 777 } 778 779 if (kind == svn_node_symlink) 780 { 781 svn_boolean_t retry_if_dir = FALSE; 782 svn_wc__db_status_t status; 783 svn_boolean_t conflicted; 784 svn_error_t *err; 785 786 /* Check if the symlink is versioned or obstructs a versioned node 787 * in this DB -- in that case, use this wcroot. Else, if the symlink 788 * points to a directory, try to find a wcroot in that directory 789 * instead. */ 790 791 if (*wcroot) 792 { 793 err = svn_wc__db_read_info_internal(&status, NULL, NULL, NULL, NULL, 794 NULL, NULL, NULL, NULL, NULL, 795 NULL, NULL, NULL, NULL, NULL, 796 NULL, NULL, NULL, &conflicted, 797 NULL, NULL, NULL, NULL, NULL, 798 NULL, *wcroot, *local_relpath, 799 scratch_pool, scratch_pool); 800 if (err) 801 { 802 if (err->apr_err != SVN_ERR_WC_PATH_NOT_FOUND 803 && !SVN_WC__ERR_IS_NOT_CURRENT_WC(err)) 804 return svn_error_trace(err); 805 806 svn_error_clear(err); 807 retry_if_dir = TRUE; /* The symlink is unversioned. */ 808 } 809 else 810 { 811 /* The symlink is versioned, or obstructs a versioned node. 812 * Ignore non-conflicted not-present/excluded nodes. 813 * This allows the symlink to redirect the wcroot query to a 814 * directory, regardless of 'invisible' nodes in this WC. */ 815 retry_if_dir = ((status == svn_wc__db_status_not_present || 816 status == svn_wc__db_status_excluded || 817 status == svn_wc__db_status_server_excluded) 818 && !conflicted); 819 } 820 } 821 else 822 retry_if_dir = TRUE; 823 824 if (retry_if_dir) 825 { 826 svn_node_kind_t resolved_kind; 827 828 SVN_ERR(svn_io_check_resolved_path(original_abspath, 829 &resolved_kind, 830 scratch_pool)); 831 if (resolved_kind == svn_node_dir) 832 { 833 symlink_wcroot_abspath = original_abspath; 834 SVN_ERR(read_link_target(&local_abspath, original_abspath, 835 scratch_pool)); 836 /* This handle was opened in this function but is not going 837 to be used further so close it. */ 838 if (sdb) 839 SVN_ERR(svn_sqlite__close(sdb)); 840 goto try_symlink_as_dir; 841 } 842 } 843 } 844 845 /* We've found the appropriate WCROOT for the requested path. Stash 846 it into that path's directory. */ 847 svn_hash_sets(db->dir_data, 848 apr_pstrdup(db->state_pool, local_dir_abspath), 849 *wcroot); 850 851 /* Did we traverse up to parent directories? */ 852 if (!moved_upwards) 853 { 854 /* We did NOT move to a parent of the original requested directory. 855 We've constructed and filled in a WCROOT for the request, so we 856 are done. */ 857 return SVN_NO_ERROR; 858 } 859 860 /* The WCROOT that we just found/built was for the LOCAL_ABSPATH originally 861 passed into this function. We stepped *at least* one directory above that. 862 We should now associate the WROOT for each parent directory that does 863 not (yet) have one. */ 864 865 scan_abspath = local_dir_abspath; 866 867 do 868 { 869 const char *parent_dir = svn_dirent_dirname(scan_abspath, scratch_pool); 870 svn_wc__db_wcroot_t *parent_wcroot; 871 872 parent_wcroot = svn_hash_gets(db->dir_data, parent_dir); 873 if (parent_wcroot == NULL) 874 { 875 svn_hash_sets(db->dir_data, apr_pstrdup(db->state_pool, parent_dir), 876 *wcroot); 877 } 878 879 /* Move up a directory, stopping when we reach the directory where 880 we found/built the WCROOT. */ 881 scan_abspath = parent_dir; 882 } 883 while (strcmp(scan_abspath, local_abspath) != 0); 884 885 return SVN_NO_ERROR; 886} 887 888 889svn_error_t * 890svn_wc__db_drop_root(svn_wc__db_t *db, 891 const char *local_abspath, 892 apr_pool_t *scratch_pool) 893{ 894 svn_wc__db_wcroot_t *root_wcroot = svn_hash_gets(db->dir_data, local_abspath); 895 apr_hash_index_t *hi; 896 apr_status_t result; 897 898 if (!root_wcroot) 899 return SVN_NO_ERROR; 900 901 if (strcmp(root_wcroot->abspath, local_abspath) != 0) 902 return svn_error_createf(SVN_ERR_WC_NOT_WORKING_COPY, NULL, 903 _("'%s' is not a working copy root"), 904 svn_dirent_local_style(local_abspath, 905 scratch_pool)); 906 907 for (hi = apr_hash_first(scratch_pool, db->dir_data); 908 hi; 909 hi = apr_hash_next(hi)) 910 { 911 svn_wc__db_wcroot_t *wcroot = svn__apr_hash_index_val(hi); 912 913 if (wcroot == root_wcroot) 914 svn_hash_sets(db->dir_data, svn__apr_hash_index_key(hi), NULL); 915 } 916 917 result = apr_pool_cleanup_run(db->state_pool, root_wcroot, close_wcroot); 918 if (result != APR_SUCCESS) 919 return svn_error_wrap_apr(result, NULL); 920 921 return SVN_NO_ERROR; 922} 923