reporter.c revision 299742
1/* 2 * reporter.c : `reporter' vtable routines for updates. 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#include "svn_dirent_uri.h" 25#include "svn_hash.h" 26#include "svn_path.h" 27#include "svn_types.h" 28#include "svn_error.h" 29#include "svn_error_codes.h" 30#include "svn_fs.h" 31#include "svn_repos.h" 32#include "svn_pools.h" 33#include "svn_props.h" 34#include "repos.h" 35#include "svn_private_config.h" 36 37#include "private/svn_dep_compat.h" 38#include "private/svn_fspath.h" 39#include "private/svn_subr_private.h" 40#include "private/svn_string_private.h" 41 42#define NUM_CACHED_SOURCE_ROOTS 4 43 44/* Theory of operation: we write report operations out to a spill-buffer 45 as we receive them. When the report is finished, we read the 46 operations back out again, using them to guide the progression of 47 the delta between the source and target revs. 48 49 Spill-buffer content format: we use a simple ad-hoc format to store the 50 report operations. Each report operation is the concatention of 51 the following ("+/-" indicates the single character '+' or '-'; 52 <length> and <revnum> are written out as decimal strings): 53 54 +/- '-' marks the end of the report 55 If previous is +: 56 <length>:<bytes> Length-counted path string 57 +/- '+' indicates the presence of link_path 58 If previous is +: 59 <length>:<bytes> Length-counted link_path string 60 +/- '+' indicates presence of revnum 61 If previous is +: 62 <revnum>: Revnum of set_path or link_path 63 +/- '+' indicates depth other than svn_depth_infinity 64 If previous is +: 65 <depth>: "X","E","F","M" => 66 svn_depth_{exclude,empty,files,immediates} 67 +/- '+' indicates start_empty field set 68 +/- '+' indicates presence of lock_token field. 69 If previous is +: 70 <length>:<bytes> Length-counted lock_token string 71 72 Terminology: for brevity, this file frequently uses the prefixes 73 "s_" for source, "t_" for target, and "e_" for editor. Also, to 74 avoid overloading the word "target", we talk about the source 75 "anchor and operand", rather than the usual "anchor and target". */ 76 77/* Describes the state of a working copy subtree, as given by a 78 report. Because we keep a lookahead pathinfo, we need to allocate 79 each one of these things in a subpool of the report baton and free 80 it when done. */ 81typedef struct path_info_t 82{ 83 const char *path; /* path, munged to be anchor-relative */ 84 const char *link_path; /* NULL for set_path or delete_path */ 85 svn_revnum_t rev; /* SVN_INVALID_REVNUM for delete_path */ 86 svn_depth_t depth; /* Depth of this path, meaningless for files */ 87 svn_boolean_t start_empty; /* Meaningless for delete_path */ 88 const char *lock_token; /* NULL if no token */ 89 apr_pool_t *pool; /* Container pool */ 90} path_info_t; 91 92/* Describes the standard revision properties that are relevant for 93 reports. Since a particular revision will often show up more than 94 once in the report, we cache these properties for the time of the 95 report generation. */ 96typedef struct revision_info_t 97{ 98 svn_revnum_t rev; /* revision number */ 99 svn_string_t* date; /* revision timestamp */ 100 svn_string_t* author; /* name of the revisions' author */ 101} revision_info_t; 102 103/* A structure used by the routines within the `reporter' vtable, 104 driven by the client as it describes its working copy revisions. */ 105typedef struct report_baton_t 106{ 107 /* Parameters remembered from svn_repos_begin_report3 */ 108 svn_repos_t *repos; 109 const char *fs_base; /* fspath corresponding to wc anchor */ 110 const char *s_operand; /* anchor-relative wc target (may be empty) */ 111 svn_revnum_t t_rev; /* Revnum which the edit will bring the wc to */ 112 const char *t_path; /* FS path the edit will bring the wc to */ 113 svn_boolean_t text_deltas; /* Whether to report text deltas */ 114 apr_size_t zero_copy_limit; /* Max item size that will be sent using 115 the zero-copy code path. */ 116 117 /* If the client requested a specific depth, record it here; if the 118 client did not, then this is svn_depth_unknown, and the depth of 119 information transmitted from server to client will be governed 120 strictly by the path-associated depths recorded in the report. */ 121 svn_depth_t requested_depth; 122 123 svn_boolean_t ignore_ancestry; 124 svn_boolean_t send_copyfrom_args; 125 svn_boolean_t is_switch; 126 const svn_delta_editor_t *editor; 127 void *edit_baton; 128 svn_repos_authz_func_t authz_read_func; 129 void *authz_read_baton; 130 131 /* The spill-buffer holding the report. */ 132 svn_spillbuf_reader_t *reader; 133 134 /* For the actual editor drive, we'll need a lookahead path info 135 entry, a cache of FS roots, and a pool to store them. */ 136 path_info_t *lookahead; 137 svn_fs_root_t *t_root; 138 svn_fs_root_t *s_roots[NUM_CACHED_SOURCE_ROOTS]; 139 140 /* Cache for revision properties. This is used to eliminate redundant 141 revprop fetching. */ 142 apr_hash_t *revision_infos; 143 144 /* This will not change. So, fetch it once and reuse it. */ 145 svn_string_t *repos_uuid; 146 apr_pool_t *pool; 147} report_baton_t; 148 149/* The type of a function that accepts changes to an object's property 150 list. OBJECT is the object whose properties are being changed. 151 NAME is the name of the property to change. VALUE is the new value 152 for the property, or zero if the property should be deleted. */ 153typedef svn_error_t *proplist_change_fn_t(report_baton_t *b, void *object, 154 const char *name, 155 const svn_string_t *value, 156 apr_pool_t *pool); 157 158static svn_error_t *delta_dirs(report_baton_t *b, svn_revnum_t s_rev, 159 const char *s_path, const char *t_path, 160 void *dir_baton, const char *e_path, 161 svn_boolean_t start_empty, 162 svn_depth_t wc_depth, 163 svn_depth_t requested_depth, 164 apr_pool_t *pool); 165 166/* --- READING PREVIOUSLY STORED REPORT INFORMATION --- */ 167 168static svn_error_t * 169read_number(apr_uint64_t *num, svn_spillbuf_reader_t *reader, apr_pool_t *pool) 170{ 171 char c; 172 173 *num = 0; 174 while (1) 175 { 176 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 177 if (c == ':') 178 break; 179 *num = *num * 10 + (c - '0'); 180 } 181 return SVN_NO_ERROR; 182} 183 184static svn_error_t * 185read_string(const char **str, svn_spillbuf_reader_t *reader, apr_pool_t *pool) 186{ 187 apr_uint64_t len; 188 apr_size_t size; 189 apr_size_t amt; 190 char *buf; 191 192 SVN_ERR(read_number(&len, reader, pool)); 193 194 /* Len can never be less than zero. But could len be so large that 195 len + 1 wraps around and we end up passing 0 to apr_palloc(), 196 thus getting a pointer to no storage? Probably not (16 exabyte 197 string, anyone?) but let's be future-proof anyway. */ 198 if (len + 1 < len || len + 1 > APR_SIZE_MAX) 199 { 200 /* xgettext doesn't expand preprocessor definitions, so we must 201 pass translatable string to apr_psprintf() function to create 202 intermediate string with appropriate format specifier. */ 203 return svn_error_createf(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 204 apr_psprintf(pool, 205 _("Invalid length (%%%s) when " 206 "about to read a string"), 207 APR_UINT64_T_FMT), 208 len); 209 } 210 211 size = (apr_size_t)len; 212 buf = apr_palloc(pool, size+1); 213 if (size > 0) 214 { 215 SVN_ERR(svn_spillbuf__reader_read(&amt, reader, buf, size, pool)); 216 SVN_ERR_ASSERT(amt == size); 217 } 218 buf[len] = 0; 219 *str = buf; 220 return SVN_NO_ERROR; 221} 222 223static svn_error_t * 224read_rev(svn_revnum_t *rev, svn_spillbuf_reader_t *reader, apr_pool_t *pool) 225{ 226 char c; 227 apr_uint64_t num; 228 229 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 230 if (c == '+') 231 { 232 SVN_ERR(read_number(&num, reader, pool)); 233 *rev = (svn_revnum_t) num; 234 } 235 else 236 *rev = SVN_INVALID_REVNUM; 237 return SVN_NO_ERROR; 238} 239 240/* Read a single character to set *DEPTH (having already read '+') 241 from READER. PATH is the path to which the depth applies, and is 242 used for error reporting only. */ 243static svn_error_t * 244read_depth(svn_depth_t *depth, svn_spillbuf_reader_t *reader, const char *path, 245 apr_pool_t *pool) 246{ 247 char c; 248 249 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 250 switch (c) 251 { 252 case 'X': 253 *depth = svn_depth_exclude; 254 break; 255 case 'E': 256 *depth = svn_depth_empty; 257 break; 258 case 'F': 259 *depth = svn_depth_files; 260 break; 261 case 'M': 262 *depth = svn_depth_immediates; 263 break; 264 265 /* Note that we do not tolerate explicit representation of 266 svn_depth_infinity here, because that's not how 267 write_path_info() writes it. */ 268 default: 269 return svn_error_createf(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 270 _("Invalid depth (%c) for path '%s'"), c, path); 271 } 272 273 return SVN_NO_ERROR; 274} 275 276/* Read a report operation *PI out of READER. Set *PI to NULL if we 277 have reached the end of the report. */ 278static svn_error_t * 279read_path_info(path_info_t **pi, 280 svn_spillbuf_reader_t *reader, 281 apr_pool_t *pool) 282{ 283 char c; 284 285 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 286 if (c == '-') 287 { 288 *pi = NULL; 289 return SVN_NO_ERROR; 290 } 291 292 *pi = apr_palloc(pool, sizeof(**pi)); 293 SVN_ERR(read_string(&(*pi)->path, reader, pool)); 294 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 295 if (c == '+') 296 SVN_ERR(read_string(&(*pi)->link_path, reader, pool)); 297 else 298 (*pi)->link_path = NULL; 299 SVN_ERR(read_rev(&(*pi)->rev, reader, pool)); 300 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 301 if (c == '+') 302 SVN_ERR(read_depth(&((*pi)->depth), reader, (*pi)->path, pool)); 303 else 304 (*pi)->depth = svn_depth_infinity; 305 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 306 (*pi)->start_empty = (c == '+'); 307 SVN_ERR(svn_spillbuf__reader_getc(&c, reader, pool)); 308 if (c == '+') 309 SVN_ERR(read_string(&(*pi)->lock_token, reader, pool)); 310 else 311 (*pi)->lock_token = NULL; 312 (*pi)->pool = pool; 313 return SVN_NO_ERROR; 314} 315 316/* Return true if PI's path is a child of PREFIX (which has length PLEN). */ 317static svn_boolean_t 318relevant(path_info_t *pi, const char *prefix, apr_size_t plen) 319{ 320 return (pi && strncmp(pi->path, prefix, plen) == 0 && 321 (!*prefix || pi->path[plen] == '/')); 322} 323 324/* Fetch the next pathinfo from B->reader for a descendant of 325 PREFIX. If the next pathinfo is for an immediate child of PREFIX, 326 set *ENTRY to the path component of the report information and 327 *INFO to the path information for that entry. If the next pathinfo 328 is for a grandchild or other more remote descendant of PREFIX, set 329 *ENTRY to the immediate child corresponding to that descendant and 330 set *INFO to NULL. If the next pathinfo is not for a descendant of 331 PREFIX, or if we reach the end of the report, set both *ENTRY and 332 *INFO to NULL. 333 334 At all times, B->lookahead is presumed to be the next pathinfo not 335 yet returned as an immediate child, or NULL if we have reached the 336 end of the report. Because we use a lookahead element, we can't 337 rely on the usual nested pool lifetimes, so allocate each pathinfo 338 in a subpool of the report baton's pool. The caller should delete 339 (*INFO)->pool when it is done with the information. */ 340static svn_error_t * 341fetch_path_info(report_baton_t *b, const char **entry, path_info_t **info, 342 const char *prefix, apr_pool_t *pool) 343{ 344 apr_size_t plen = strlen(prefix); 345 const char *relpath, *sep; 346 apr_pool_t *subpool; 347 348 if (!relevant(b->lookahead, prefix, plen)) 349 { 350 /* No more entries relevant to prefix. */ 351 *entry = NULL; 352 *info = NULL; 353 } 354 else 355 { 356 /* Take a look at the prefix-relative part of the path. */ 357 relpath = b->lookahead->path + (*prefix ? plen + 1 : 0); 358 sep = strchr(relpath, '/'); 359 if (sep) 360 { 361 /* Return the immediate child part; do not advance. */ 362 *entry = apr_pstrmemdup(pool, relpath, sep - relpath); 363 *info = NULL; 364 } 365 else 366 { 367 /* This is an immediate child; return it and advance. */ 368 *entry = relpath; 369 *info = b->lookahead; 370 subpool = svn_pool_create(b->pool); 371 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 372 } 373 } 374 return SVN_NO_ERROR; 375} 376 377/* Skip all path info entries relevant to *PREFIX. Call this when the 378 editor drive skips a directory. */ 379static svn_error_t * 380skip_path_info(report_baton_t *b, const char *prefix) 381{ 382 apr_size_t plen = strlen(prefix); 383 apr_pool_t *subpool; 384 385 while (relevant(b->lookahead, prefix, plen)) 386 { 387 svn_pool_destroy(b->lookahead->pool); 388 subpool = svn_pool_create(b->pool); 389 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 390 } 391 return SVN_NO_ERROR; 392} 393 394/* Return true if there is at least one path info entry relevant to *PREFIX. */ 395static svn_boolean_t 396any_path_info(report_baton_t *b, const char *prefix) 397{ 398 return relevant(b->lookahead, prefix, strlen(prefix)); 399} 400 401/* --- DRIVING THE EDITOR ONCE THE REPORT IS FINISHED --- */ 402 403/* While driving the editor, the target root will remain constant, but 404 we may have to jump around between source roots depending on the 405 state of the working copy. If we were to open a root each time we 406 revisit a rev, we would get no benefit from node-id caching; on the 407 other hand, if we hold open all the roots we ever visit, we'll use 408 an unbounded amount of memory. As a compromise, we maintain a 409 fixed-size LRU cache of source roots. get_source_root retrieves a 410 root from the cache, using POOL to allocate the new root if 411 necessary. Be careful not to hold onto the root for too long, 412 particularly after recursing, since another call to get_source_root 413 can close it. */ 414static svn_error_t * 415get_source_root(report_baton_t *b, svn_fs_root_t **s_root, svn_revnum_t rev) 416{ 417 int i; 418 svn_fs_root_t *root, *prev = NULL; 419 420 /* Look for the desired root in the cache, sliding all the unmatched 421 entries backwards a slot to make room for the right one. */ 422 for (i = 0; i < NUM_CACHED_SOURCE_ROOTS; i++) 423 { 424 root = b->s_roots[i]; 425 b->s_roots[i] = prev; 426 if (root && svn_fs_revision_root_revision(root) == rev) 427 break; 428 prev = root; 429 } 430 431 /* If we didn't find it, throw out the oldest root and open a new one. */ 432 if (i == NUM_CACHED_SOURCE_ROOTS) 433 { 434 if (prev) 435 svn_fs_close_root(prev); 436 SVN_ERR(svn_fs_revision_root(&root, b->repos->fs, rev, b->pool)); 437 } 438 439 /* Assign the desired root to the first cache slot and hand it back. */ 440 b->s_roots[0] = root; 441 *s_root = root; 442 return SVN_NO_ERROR; 443} 444 445/* Call the directory property-setting function of B->editor to set 446 the property NAME to VALUE on DIR_BATON. */ 447static svn_error_t * 448change_dir_prop(report_baton_t *b, void *dir_baton, const char *name, 449 const svn_string_t *value, apr_pool_t *pool) 450{ 451 return svn_error_trace(b->editor->change_dir_prop(dir_baton, name, value, 452 pool)); 453} 454 455/* Call the file property-setting function of B->editor to set the 456 property NAME to VALUE on FILE_BATON. */ 457static svn_error_t * 458change_file_prop(report_baton_t *b, void *file_baton, const char *name, 459 const svn_string_t *value, apr_pool_t *pool) 460{ 461 return svn_error_trace(b->editor->change_file_prop(file_baton, name, value, 462 pool)); 463} 464 465/* For the report B, return the relevant revprop data of revision REV in 466 REVISION_INFO. The revision info will be allocated in b->pool. 467 Temporaries get allocated on SCRATCH_POOL. */ 468static svn_error_t * 469get_revision_info(report_baton_t *b, 470 svn_revnum_t rev, 471 revision_info_t** revision_info, 472 apr_pool_t *scratch_pool) 473{ 474 apr_hash_t *r_props; 475 svn_string_t *cdate, *author; 476 revision_info_t* info; 477 478 /* Try to find the info in the report's cache */ 479 info = apr_hash_get(b->revision_infos, &rev, sizeof(rev)); 480 if (!info) 481 { 482 /* Info is not available, yet. 483 Get all revprops. */ 484 SVN_ERR(svn_fs_revision_proplist(&r_props, 485 b->repos->fs, 486 rev, 487 scratch_pool)); 488 489 /* Extract the committed-date. */ 490 cdate = svn_hash_gets(r_props, SVN_PROP_REVISION_DATE); 491 492 /* Extract the last-author. */ 493 author = svn_hash_gets(r_props, SVN_PROP_REVISION_AUTHOR); 494 495 /* Create a result object */ 496 info = apr_palloc(b->pool, sizeof(*info)); 497 info->rev = rev; 498 info->date = svn_string_dup(cdate, b->pool); 499 info->author = svn_string_dup(author, b->pool); 500 501 /* Cache it */ 502 apr_hash_set(b->revision_infos, &info->rev, sizeof(info->rev), info); 503 } 504 505 *revision_info = info; 506 return SVN_NO_ERROR; 507} 508 509 510/* Generate the appropriate property editing calls to turn the 511 properties of S_REV/S_PATH into those of B->t_root/T_PATH. If 512 S_PATH is NULL, this is an add, so assume the target starts with no 513 properties. Pass OBJECT on to the editor function wrapper 514 CHANGE_FN. */ 515static svn_error_t * 516delta_proplists(report_baton_t *b, svn_revnum_t s_rev, const char *s_path, 517 const char *t_path, const char *lock_token, 518 proplist_change_fn_t *change_fn, 519 void *object, apr_pool_t *pool) 520{ 521 svn_fs_root_t *s_root; 522 apr_hash_t *s_props = NULL, *t_props; 523 apr_array_header_t *prop_diffs; 524 int i; 525 svn_revnum_t crev; 526 revision_info_t *revision_info; 527 svn_boolean_t changed; 528 const svn_prop_t *pc; 529 svn_lock_t *lock; 530 apr_hash_index_t *hi; 531 532 /* Fetch the created-rev and send entry props. */ 533 SVN_ERR(svn_fs_node_created_rev(&crev, b->t_root, t_path, pool)); 534 if (SVN_IS_VALID_REVNUM(crev)) 535 { 536 /* convert committed-rev to string */ 537 char buf[SVN_INT64_BUFFER_SIZE]; 538 svn_string_t cr_str; 539 cr_str.data = buf; 540 cr_str.len = svn__i64toa(buf, crev); 541 542 /* Transmit the committed-rev. */ 543 SVN_ERR(change_fn(b, object, 544 SVN_PROP_ENTRY_COMMITTED_REV, &cr_str, pool)); 545 546 SVN_ERR(get_revision_info(b, crev, &revision_info, pool)); 547 548 /* Transmit the committed-date. */ 549 if (revision_info->date || s_path) 550 SVN_ERR(change_fn(b, object, SVN_PROP_ENTRY_COMMITTED_DATE, 551 revision_info->date, pool)); 552 553 /* Transmit the last-author. */ 554 if (revision_info->author || s_path) 555 SVN_ERR(change_fn(b, object, SVN_PROP_ENTRY_LAST_AUTHOR, 556 revision_info->author, pool)); 557 558 /* Transmit the UUID. */ 559 SVN_ERR(change_fn(b, object, SVN_PROP_ENTRY_UUID, 560 b->repos_uuid, pool)); 561 } 562 563 /* Update lock properties. */ 564 if (lock_token) 565 { 566 SVN_ERR(svn_fs_get_lock(&lock, b->repos->fs, t_path, pool)); 567 568 /* Delete a defunct lock. */ 569 if (! lock || strcmp(lock_token, lock->token) != 0) 570 SVN_ERR(change_fn(b, object, SVN_PROP_ENTRY_LOCK_TOKEN, 571 NULL, pool)); 572 } 573 574 if (s_path) 575 { 576 SVN_ERR(get_source_root(b, &s_root, s_rev)); 577 578 /* Is this deltification worth our time? */ 579 SVN_ERR(svn_fs_props_different(&changed, b->t_root, t_path, s_root, 580 s_path, pool)); 581 if (! changed) 582 return SVN_NO_ERROR; 583 584 /* If so, go ahead and get the source path's properties. */ 585 SVN_ERR(svn_fs_node_proplist(&s_props, s_root, s_path, pool)); 586 } 587 588 /* Get the target path's properties */ 589 SVN_ERR(svn_fs_node_proplist(&t_props, b->t_root, t_path, pool)); 590 591 if (s_props && apr_hash_count(s_props)) 592 { 593 /* Now transmit the differences. */ 594 SVN_ERR(svn_prop_diffs(&prop_diffs, t_props, s_props, pool)); 595 for (i = 0; i < prop_diffs->nelts; i++) 596 { 597 pc = &APR_ARRAY_IDX(prop_diffs, i, svn_prop_t); 598 SVN_ERR(change_fn(b, object, pc->name, pc->value, pool)); 599 } 600 } 601 else if (apr_hash_count(t_props)) 602 { 603 /* So source, i.e. all new. Transmit all target props. */ 604 for (hi = apr_hash_first(pool, t_props); hi; hi = apr_hash_next(hi)) 605 { 606 const char *key = apr_hash_this_key(hi); 607 svn_string_t *val = apr_hash_this_val(hi); 608 609 SVN_ERR(change_fn(b, object, key, val, pool)); 610 } 611 } 612 613 return SVN_NO_ERROR; 614} 615 616/* Baton type to be passed into send_zero_copy_delta. 617 */ 618typedef struct zero_copy_baton_t 619{ 620 /* don't process data larger than this limit */ 621 apr_size_t zero_copy_limit; 622 623 /* window handler and baton to send the data to */ 624 svn_txdelta_window_handler_t dhandler; 625 void *dbaton; 626 627 /* return value: will be set to TRUE, if the data was processed. */ 628 svn_boolean_t zero_copy_succeeded; 629} zero_copy_baton_t; 630 631/* Implement svn_fs_process_contents_func_t. If LEN is smaller than the 632 * limit given in *BATON, send the CONTENTS as an delta windows to the 633 * handler given in BATON and set the ZERO_COPY_SUCCEEDED flag in that 634 * BATON. Otherwise, reset it to FALSE. 635 * Use POOL for temporary allocations. 636 */ 637static svn_error_t * 638send_zero_copy_delta(const unsigned char *contents, 639 apr_size_t len, 640 void *baton, 641 apr_pool_t *pool) 642{ 643 zero_copy_baton_t *zero_copy_baton = baton; 644 645 /* if the item is too large, the caller must revert to traditional 646 streaming code. */ 647 if (len > zero_copy_baton->zero_copy_limit) 648 { 649 zero_copy_baton->zero_copy_succeeded = FALSE; 650 return SVN_NO_ERROR; 651 } 652 653 SVN_ERR(svn_txdelta_send_contents(contents, len, 654 zero_copy_baton->dhandler, 655 zero_copy_baton->dbaton, pool)); 656 657 /* all fine now */ 658 zero_copy_baton->zero_copy_succeeded = TRUE; 659 return SVN_NO_ERROR; 660} 661 662 663/* Make the appropriate edits on FILE_BATON to change its contents and 664 properties from those in S_REV/S_PATH to those in B->t_root/T_PATH, 665 possibly using LOCK_TOKEN to determine if the client's lock on the file 666 is defunct. */ 667static svn_error_t * 668delta_files(report_baton_t *b, void *file_baton, svn_revnum_t s_rev, 669 const char *s_path, const char *t_path, const char *lock_token, 670 apr_pool_t *pool) 671{ 672 svn_boolean_t changed; 673 svn_fs_root_t *s_root = NULL; 674 svn_txdelta_stream_t *dstream = NULL; 675 svn_checksum_t *s_checksum; 676 const char *s_hex_digest = NULL; 677 svn_txdelta_window_handler_t dhandler; 678 void *dbaton; 679 680 /* Compare the files' property lists. */ 681 SVN_ERR(delta_proplists(b, s_rev, s_path, t_path, lock_token, 682 change_file_prop, file_baton, pool)); 683 684 if (s_path) 685 { 686 SVN_ERR(get_source_root(b, &s_root, s_rev)); 687 688 /* We're not interested in the theoretical difference between "has 689 contents which have not changed with respect to" and "has the same 690 actual contents as" when sending text-deltas. If we know the 691 delta is an empty one, we avoiding sending it in either case. */ 692 SVN_ERR(svn_repos__compare_files(&changed, b->t_root, t_path, 693 s_root, s_path, pool)); 694 695 if (!changed) 696 return SVN_NO_ERROR; 697 698 SVN_ERR(svn_fs_file_checksum(&s_checksum, svn_checksum_md5, s_root, 699 s_path, TRUE, pool)); 700 s_hex_digest = svn_checksum_to_cstring(s_checksum, pool); 701 } 702 703 /* Send the delta stream if desired, or just a NULL window if not. */ 704 SVN_ERR(b->editor->apply_textdelta(file_baton, s_hex_digest, pool, 705 &dhandler, &dbaton)); 706 707 if (dhandler != svn_delta_noop_window_handler) 708 { 709 if (b->text_deltas) 710 { 711 /* if we send deltas against empty streams, we may use our 712 zero-copy code. */ 713 if (b->zero_copy_limit > 0 && s_path == NULL) 714 { 715 zero_copy_baton_t baton; 716 svn_boolean_t called = FALSE; 717 718 baton.zero_copy_limit = b->zero_copy_limit; 719 baton.dhandler = dhandler; 720 baton.dbaton = dbaton; 721 baton.zero_copy_succeeded = FALSE; 722 SVN_ERR(svn_fs_try_process_file_contents(&called, 723 b->t_root, t_path, 724 send_zero_copy_delta, 725 &baton, pool)); 726 727 /* data has been available and small enough, 728 i.e. been processed? */ 729 if (called && baton.zero_copy_succeeded) 730 return SVN_NO_ERROR; 731 } 732 733 SVN_ERR(svn_fs_get_file_delta_stream(&dstream, s_root, s_path, 734 b->t_root, t_path, pool)); 735 SVN_ERR(svn_txdelta_send_txstream(dstream, dhandler, dbaton, pool)); 736 } 737 else 738 SVN_ERR(dhandler(NULL, dbaton)); 739 } 740 741 return SVN_NO_ERROR; 742} 743 744/* Determine if the user is authorized to view B->t_root/PATH. */ 745static svn_error_t * 746check_auth(report_baton_t *b, svn_boolean_t *allowed, const char *path, 747 apr_pool_t *pool) 748{ 749 if (b->authz_read_func) 750 return svn_error_trace(b->authz_read_func(allowed, b->t_root, path, 751 b->authz_read_baton, pool)); 752 *allowed = TRUE; 753 return SVN_NO_ERROR; 754} 755 756/* Create a dirent in *ENTRY for the given ROOT and PATH. We use this to 757 replace the source or target dirent when a report pathinfo tells us to 758 change paths or revisions. */ 759static svn_error_t * 760fake_dirent(const svn_fs_dirent_t **entry, svn_fs_root_t *root, 761 const char *path, apr_pool_t *pool) 762{ 763 svn_node_kind_t kind; 764 svn_fs_dirent_t *ent; 765 766 SVN_ERR(svn_fs_check_path(&kind, root, path, pool)); 767 if (kind == svn_node_none) 768 *entry = NULL; 769 else 770 { 771 ent = apr_palloc(pool, sizeof(**entry)); 772 /* ### All callers should be updated to pass just one of these 773 formats */ 774 ent->name = (*path == '/') ? svn_fspath__basename(path, pool) 775 : svn_relpath_basename(path, pool); 776 SVN_ERR(svn_fs_node_id(&ent->id, root, path, pool)); 777 ent->kind = kind; 778 *entry = ent; 779 } 780 return SVN_NO_ERROR; 781} 782 783 784/* Given REQUESTED_DEPTH, WC_DEPTH and the current entry's KIND, 785 determine whether we need to send the whole entry, not just deltas. 786 Please refer to delta_dirs' docstring for an explanation of the 787 conditionals below. */ 788static svn_boolean_t 789is_depth_upgrade(svn_depth_t wc_depth, 790 svn_depth_t requested_depth, 791 svn_node_kind_t kind) 792{ 793 if (requested_depth == svn_depth_unknown 794 || requested_depth <= wc_depth 795 || wc_depth == svn_depth_immediates) 796 return FALSE; 797 798 if (kind == svn_node_file 799 && wc_depth == svn_depth_files) 800 return FALSE; 801 802 if (kind == svn_node_dir 803 && wc_depth == svn_depth_empty 804 && requested_depth == svn_depth_files) 805 return FALSE; 806 807 return TRUE; 808} 809 810 811/* Call the B->editor's add_file() function to create PATH as a child 812 of PARENT_BATON, returning a new baton in *NEW_FILE_BATON. 813 However, make an attempt to send 'copyfrom' arguments if they're 814 available, by examining the closest copy of the original file 815 O_PATH within B->t_root. If any copyfrom args are discovered, 816 return those in *COPYFROM_PATH and *COPYFROM_REV; otherwise leave 817 those return args untouched. */ 818static svn_error_t * 819add_file_smartly(report_baton_t *b, 820 const char *path, 821 void *parent_baton, 822 const char *o_path, 823 void **new_file_baton, 824 const char **copyfrom_path, 825 svn_revnum_t *copyfrom_rev, 826 apr_pool_t *pool) 827{ 828 /* ### TODO: use a subpool to do this work, clear it at the end? */ 829 svn_fs_t *fs = svn_repos_fs(b->repos); 830 svn_fs_root_t *closest_copy_root = NULL; 831 const char *closest_copy_path = NULL; 832 833 /* Pre-emptively assume no copyfrom args exist. */ 834 *copyfrom_path = NULL; 835 *copyfrom_rev = SVN_INVALID_REVNUM; 836 837 if (b->send_copyfrom_args) 838 { 839 /* Find the destination of the nearest 'copy event' which may have 840 caused o_path@t_root to exist. svn_fs_closest_copy only returns paths 841 starting with '/', so make sure o_path always starts with a '/' 842 too. */ 843 if (*o_path != '/') 844 o_path = apr_pstrcat(pool, "/", o_path, SVN_VA_NULL); 845 846 SVN_ERR(svn_fs_closest_copy(&closest_copy_root, &closest_copy_path, 847 b->t_root, o_path, pool)); 848 if (closest_copy_root != NULL) 849 { 850 /* If the destination of the copy event is the same path as 851 o_path, then we've found something interesting that should 852 have 'copyfrom' history. */ 853 if (strcmp(closest_copy_path, o_path) == 0) 854 { 855 SVN_ERR(svn_fs_copied_from(copyfrom_rev, copyfrom_path, 856 closest_copy_root, closest_copy_path, 857 pool)); 858 if (b->authz_read_func) 859 { 860 svn_boolean_t allowed; 861 svn_fs_root_t *copyfrom_root; 862 SVN_ERR(svn_fs_revision_root(©from_root, fs, 863 *copyfrom_rev, pool)); 864 SVN_ERR(b->authz_read_func(&allowed, copyfrom_root, 865 *copyfrom_path, b->authz_read_baton, 866 pool)); 867 if (! allowed) 868 { 869 *copyfrom_path = NULL; 870 *copyfrom_rev = SVN_INVALID_REVNUM; 871 } 872 } 873 } 874 } 875 } 876 877 return svn_error_trace(b->editor->add_file(path, parent_baton, 878 *copyfrom_path, *copyfrom_rev, 879 pool, new_file_baton)); 880} 881 882 883/* Emit a series of editing operations to transform a source entry to 884 a target entry. 885 886 S_REV and S_PATH specify the source entry. S_ENTRY contains the 887 already-looked-up information about the node-revision existing at 888 that location. S_PATH and S_ENTRY may be NULL if the entry does 889 not exist in the source. S_PATH may be non-NULL and S_ENTRY may be 890 NULL if the caller expects INFO to modify the source to an existing 891 location. 892 893 B->t_root and T_PATH specify the target entry. T_ENTRY contains 894 the already-looked-up information about the node-revision existing 895 at that location. T_PATH and T_ENTRY may be NULL if the entry does 896 not exist in the target. 897 898 DIR_BATON and E_PATH contain the parameters which should be passed 899 to the editor calls--DIR_BATON for the parent directory baton and 900 E_PATH for the pathname. (E_PATH is the anchor-relative working 901 copy pathname, which may differ from the source and target 902 pathnames if the report contains a link_path.) 903 904 INFO contains the report information for this working copy path, or 905 NULL if there is none. This function will internally modify the 906 source and target entries as appropriate based on the report 907 information. 908 909 WC_DEPTH and REQUESTED_DEPTH are propagated to delta_dirs() if 910 necessary. Refer to delta_dirs' docstring to find out what 911 should happen for various combinations of WC_DEPTH/REQUESTED_DEPTH. */ 912static svn_error_t * 913update_entry(report_baton_t *b, svn_revnum_t s_rev, const char *s_path, 914 const svn_fs_dirent_t *s_entry, const char *t_path, 915 const svn_fs_dirent_t *t_entry, void *dir_baton, 916 const char *e_path, path_info_t *info, svn_depth_t wc_depth, 917 svn_depth_t requested_depth, apr_pool_t *pool) 918{ 919 svn_fs_root_t *s_root; 920 svn_boolean_t allowed, related; 921 void *new_baton; 922 svn_checksum_t *checksum; 923 const char *hex_digest; 924 925 /* For non-switch operations, follow link_path in the target. */ 926 if (info && info->link_path && !b->is_switch) 927 { 928 t_path = info->link_path; 929 SVN_ERR(fake_dirent(&t_entry, b->t_root, t_path, pool)); 930 } 931 932 if (info && !SVN_IS_VALID_REVNUM(info->rev)) 933 { 934 /* Delete this entry in the source. */ 935 s_path = NULL; 936 s_entry = NULL; 937 } 938 else if (info && s_path) 939 { 940 /* Follow the rev and possibly path in this entry. */ 941 s_path = (info->link_path) ? info->link_path : s_path; 942 s_rev = info->rev; 943 SVN_ERR(get_source_root(b, &s_root, s_rev)); 944 SVN_ERR(fake_dirent(&s_entry, s_root, s_path, pool)); 945 } 946 947 /* Don't let the report carry us somewhere nonexistent. */ 948 if (s_path && !s_entry) 949 return svn_error_createf(SVN_ERR_FS_NOT_FOUND, NULL, 950 _("Working copy path '%s' does not exist in " 951 "repository"), e_path); 952 953 /* If the source and target both exist and are of the same kind, 954 then find out whether they're related. If they're exactly the 955 same, then we don't have to do anything (unless the report has 956 changes to the source). If we're ignoring ancestry, then any two 957 nodes of the same type are related enough for us. */ 958 related = FALSE; 959 if (s_entry && t_entry && s_entry->kind == t_entry->kind) 960 { 961 int distance = svn_fs_compare_ids(s_entry->id, t_entry->id); 962 if (distance == 0 && !any_path_info(b, e_path) 963 && (requested_depth <= wc_depth || t_entry->kind == svn_node_file)) 964 { 965 if (!info) 966 return SVN_NO_ERROR; 967 968 if (!info->start_empty) 969 { 970 svn_lock_t *lock; 971 972 if (!info->lock_token) 973 return SVN_NO_ERROR; 974 975 SVN_ERR(svn_fs_get_lock(&lock, b->repos->fs, t_path, pool)); 976 if (lock && (strcmp(lock->token, info->lock_token) == 0)) 977 return SVN_NO_ERROR; 978 } 979 } 980 981 related = (distance != -1 || b->ignore_ancestry); 982 } 983 984 /* If there's a source and it's not related to the target, nuke it. */ 985 if (s_entry && !related) 986 { 987 svn_revnum_t deleted_rev; 988 989 SVN_ERR(svn_repos_deleted_rev(svn_fs_root_fs(b->t_root), t_path, 990 s_rev, b->t_rev, &deleted_rev, 991 pool)); 992 993 if (!SVN_IS_VALID_REVNUM(deleted_rev)) 994 { 995 /* Two possibilities: either the thing doesn't exist in S_REV; or 996 it wasn't deleted between S_REV and B->T_REV. In the first case, 997 I think we should leave DELETED_REV as SVN_INVALID_REVNUM, but 998 in the second, it should be set to B->T_REV-1 for the call to 999 delete_entry() below. */ 1000 svn_node_kind_t kind; 1001 1002 SVN_ERR(svn_fs_check_path(&kind, b->t_root, t_path, pool)); 1003 if (kind != svn_node_none) 1004 deleted_rev = b->t_rev - 1; 1005 } 1006 1007 SVN_ERR(b->editor->delete_entry(e_path, deleted_rev, dir_baton, 1008 pool)); 1009 s_path = NULL; 1010 } 1011 1012 /* If there's no target, we have nothing more to do. */ 1013 if (!t_entry) 1014 return svn_error_trace(skip_path_info(b, e_path)); 1015 1016 /* Check if the user is authorized to find out about the target. */ 1017 SVN_ERR(check_auth(b, &allowed, t_path, pool)); 1018 if (!allowed) 1019 { 1020 if (t_entry->kind == svn_node_dir) 1021 SVN_ERR(b->editor->absent_directory(e_path, dir_baton, pool)); 1022 else 1023 SVN_ERR(b->editor->absent_file(e_path, dir_baton, pool)); 1024 return svn_error_trace(skip_path_info(b, e_path)); 1025 } 1026 1027 if (t_entry->kind == svn_node_dir) 1028 { 1029 if (related) 1030 SVN_ERR(b->editor->open_directory(e_path, dir_baton, s_rev, pool, 1031 &new_baton)); 1032 else 1033 SVN_ERR(b->editor->add_directory(e_path, dir_baton, NULL, 1034 SVN_INVALID_REVNUM, pool, 1035 &new_baton)); 1036 1037 SVN_ERR(delta_dirs(b, s_rev, s_path, t_path, new_baton, e_path, 1038 info ? info->start_empty : FALSE, 1039 wc_depth, requested_depth, pool)); 1040 return svn_error_trace(b->editor->close_directory(new_baton, pool)); 1041 } 1042 else 1043 { 1044 if (related) 1045 { 1046 SVN_ERR(b->editor->open_file(e_path, dir_baton, s_rev, pool, 1047 &new_baton)); 1048 SVN_ERR(delta_files(b, new_baton, s_rev, s_path, t_path, 1049 info ? info->lock_token : NULL, pool)); 1050 } 1051 else 1052 { 1053 svn_revnum_t copyfrom_rev = SVN_INVALID_REVNUM; 1054 const char *copyfrom_path = NULL; 1055 SVN_ERR(add_file_smartly(b, e_path, dir_baton, t_path, &new_baton, 1056 ©from_path, ©from_rev, pool)); 1057 if (! copyfrom_path) 1058 /* Send txdelta between empty file (s_path@s_rev doesn't 1059 exist) and added file (t_path@t_root). */ 1060 SVN_ERR(delta_files(b, new_baton, s_rev, s_path, t_path, 1061 info ? info->lock_token : NULL, pool)); 1062 else 1063 /* Send txdelta between copied file (copyfrom_path@copyfrom_rev) 1064 and added file (tpath@t_root). */ 1065 SVN_ERR(delta_files(b, new_baton, copyfrom_rev, copyfrom_path, 1066 t_path, info ? info->lock_token : NULL, pool)); 1067 } 1068 1069 SVN_ERR(svn_fs_file_checksum(&checksum, svn_checksum_md5, b->t_root, 1070 t_path, TRUE, pool)); 1071 hex_digest = svn_checksum_to_cstring(checksum, pool); 1072 return svn_error_trace(b->editor->close_file(new_baton, hex_digest, 1073 pool)); 1074 } 1075} 1076 1077/* A helper macro for when we have to recurse into subdirectories. */ 1078#define DEPTH_BELOW_HERE(depth) ((depth) == svn_depth_immediates) ? \ 1079 svn_depth_empty : (depth) 1080 1081/* Emit edits within directory DIR_BATON (with corresponding path 1082 E_PATH) with the changes from the directory S_REV/S_PATH to the 1083 directory B->t_rev/T_PATH. S_PATH may be NULL if the entry does 1084 not exist in the source. 1085 1086 WC_DEPTH is this path's depth as reported by set_path/link_path. 1087 REQUESTED_DEPTH is derived from the depth set by 1088 svn_repos_begin_report(). 1089 1090 When iterating over this directory's entries, the following tables 1091 describe what happens for all possible combinations 1092 of WC_DEPTH/REQUESTED_DEPTH (rows represent WC_DEPTH, columns 1093 represent REQUESTED_DEPTH): 1094 1095 Legend: 1096 X: ignore this entry (it's either below the requested depth, or 1097 if the requested depth is svn_depth_unknown, below the working 1098 copy depth) 1099 o: handle this entry normally 1100 U: handle the entry as if it were a newly added repository path 1101 (the client is upgrading to a deeper wc and doesn't currently 1102 have this entry, but it should be there after the upgrade, so we 1103 need to send the whole thing, not just deltas) 1104 1105 For files: 1106 ______________________________________________________________ 1107 | req. depth| unknown | empty | files | immediates | infinity | 1108 |wc. depth | | | | | | 1109 |___________|_________|_______|_______|____________|__________| 1110 |empty | X | X | U | U | U | 1111 |___________|_________|_______|_______|____________|__________| 1112 |files | o | X | o | o | o | 1113 |___________|_________|_______|_______|____________|__________| 1114 |immediates | o | X | o | o | o | 1115 |___________|_________|_______|_______|____________|__________| 1116 |infinity | o | X | o | o | o | 1117 |___________|_________|_______|_______|____________|__________| 1118 1119 For directories: 1120 ______________________________________________________________ 1121 | req. depth| unknown | empty | files | immediates | infinity | 1122 |wc. depth | | | | | | 1123 |___________|_________|_______|_______|____________|__________| 1124 |empty | X | X | X | U | U | 1125 |___________|_________|_______|_______|____________|__________| 1126 |files | X | X | X | U | U | 1127 |___________|_________|_______|_______|____________|__________| 1128 |immediates | o | X | X | o | o | 1129 |___________|_________|_______|_______|____________|__________| 1130 |infinity | o | X | X | o | o | 1131 |___________|_________|_______|_______|____________|__________| 1132 1133 These rules are enforced by the is_depth_upgrade() function and by 1134 various other checks below. 1135*/ 1136static svn_error_t * 1137delta_dirs(report_baton_t *b, svn_revnum_t s_rev, const char *s_path, 1138 const char *t_path, void *dir_baton, const char *e_path, 1139 svn_boolean_t start_empty, svn_depth_t wc_depth, 1140 svn_depth_t requested_depth, apr_pool_t *pool) 1141{ 1142 apr_hash_t *s_entries = NULL, *t_entries; 1143 apr_hash_index_t *hi; 1144 apr_pool_t *subpool = svn_pool_create(pool); 1145 apr_array_header_t *t_ordered_entries = NULL; 1146 int i; 1147 1148 /* Compare the property lists. If we're starting empty, pass a NULL 1149 source path so that we add all the properties. 1150 1151 When we support directory locks, we must pass the lock token here. */ 1152 SVN_ERR(delta_proplists(b, s_rev, start_empty ? NULL : s_path, t_path, 1153 NULL, change_dir_prop, dir_baton, subpool)); 1154 svn_pool_clear(subpool); 1155 1156 if (requested_depth > svn_depth_empty 1157 || requested_depth == svn_depth_unknown) 1158 { 1159 apr_pool_t *iterpool; 1160 1161 /* Get the list of entries in each of source and target. */ 1162 if (s_path && !start_empty) 1163 { 1164 svn_fs_root_t *s_root; 1165 1166 SVN_ERR(get_source_root(b, &s_root, s_rev)); 1167 SVN_ERR(svn_fs_dir_entries(&s_entries, s_root, s_path, subpool)); 1168 } 1169 SVN_ERR(svn_fs_dir_entries(&t_entries, b->t_root, t_path, subpool)); 1170 1171 /* Iterate over the report information for this directory. */ 1172 iterpool = svn_pool_create(subpool); 1173 1174 while (1) 1175 { 1176 path_info_t *info; 1177 const char *name, *s_fullpath, *t_fullpath, *e_fullpath; 1178 const svn_fs_dirent_t *s_entry, *t_entry; 1179 1180 svn_pool_clear(iterpool); 1181 SVN_ERR(fetch_path_info(b, &name, &info, e_path, iterpool)); 1182 if (!name) 1183 break; 1184 1185 /* Invalid revnum means we should delete, unless this is 1186 just an excluded subpath. */ 1187 if (info 1188 && !SVN_IS_VALID_REVNUM(info->rev) 1189 && info->depth != svn_depth_exclude) 1190 { 1191 /* We want to perform deletes before non-replacement adds, 1192 for graceful handling of case-only renames on 1193 case-insensitive client filesystems. So, if the report 1194 item is a delete, remove the entry from the source hash, 1195 but don't update the entry yet. */ 1196 if (s_entries) 1197 svn_hash_sets(s_entries, name, NULL); 1198 1199 svn_pool_destroy(info->pool); 1200 continue; 1201 } 1202 1203 e_fullpath = svn_relpath_join(e_path, name, iterpool); 1204 t_fullpath = svn_fspath__join(t_path, name, iterpool); 1205 t_entry = svn_hash_gets(t_entries, name); 1206 s_fullpath = s_path ? svn_fspath__join(s_path, name, iterpool) : NULL; 1207 s_entry = s_entries ? svn_hash_gets(s_entries, name) : NULL; 1208 1209 /* The only special cases where we don't process the entry are 1210 1211 - When requested_depth is files but the reported path is 1212 a directory. This is technically a client error, but we 1213 handle it anyway, by skipping the entry. 1214 1215 - When the reported depth is svn_depth_exclude. 1216 */ 1217 if (! ((requested_depth == svn_depth_files 1218 && ((t_entry && t_entry->kind == svn_node_dir) 1219 || (s_entry && s_entry->kind == svn_node_dir))) 1220 || (info && info->depth == svn_depth_exclude))) 1221 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, t_fullpath, 1222 t_entry, dir_baton, e_fullpath, info, 1223 info ? info->depth 1224 : DEPTH_BELOW_HERE(wc_depth), 1225 DEPTH_BELOW_HERE(requested_depth), iterpool)); 1226 1227 /* Don't revisit this name in the target or source entries. */ 1228 svn_hash_sets(t_entries, name, NULL); 1229 if (s_entries 1230 /* Keep the entry for later process if it is reported as 1231 excluded and got deleted in repos. */ 1232 && (! info || info->depth != svn_depth_exclude || t_entry)) 1233 svn_hash_sets(s_entries, name, NULL); 1234 1235 /* pathinfo entries live in their own subpools due to lookahead, 1236 so we need to clear each one out as we finish with it. */ 1237 if (info) 1238 svn_pool_destroy(info->pool); 1239 } 1240 1241 /* Remove any deleted entries. Do this before processing the 1242 target, for graceful handling of case-only renames. */ 1243 if (s_entries) 1244 { 1245 for (hi = apr_hash_first(subpool, s_entries); 1246 hi; 1247 hi = apr_hash_next(hi)) 1248 { 1249 const svn_fs_dirent_t *s_entry = apr_hash_this_val(hi); 1250 1251 svn_pool_clear(iterpool); 1252 1253 if (svn_hash_gets(t_entries, s_entry->name) == NULL) 1254 { 1255 const char *e_fullpath; 1256 svn_revnum_t deleted_rev; 1257 1258 if (s_entry->kind == svn_node_file 1259 && wc_depth < svn_depth_files) 1260 continue; 1261 1262 if (s_entry->kind == svn_node_dir 1263 && (wc_depth < svn_depth_immediates 1264 || requested_depth == svn_depth_files)) 1265 continue; 1266 1267 /* There is no corresponding target entry, so delete. */ 1268 e_fullpath = svn_relpath_join(e_path, s_entry->name, iterpool); 1269 SVN_ERR(svn_repos_deleted_rev(svn_fs_root_fs(b->t_root), 1270 svn_fspath__join(t_path, 1271 s_entry->name, 1272 iterpool), 1273 s_rev, b->t_rev, 1274 &deleted_rev, iterpool)); 1275 1276 SVN_ERR(b->editor->delete_entry(e_fullpath, 1277 deleted_rev, 1278 dir_baton, iterpool)); 1279 } 1280 } 1281 } 1282 1283 /* Loop over the dirents in the target. */ 1284 SVN_ERR(svn_fs_dir_optimal_order(&t_ordered_entries, b->t_root, 1285 t_entries, subpool, iterpool)); 1286 for (i = 0; i < t_ordered_entries->nelts; ++i) 1287 { 1288 const svn_fs_dirent_t *t_entry 1289 = APR_ARRAY_IDX(t_ordered_entries, i, svn_fs_dirent_t *); 1290 const svn_fs_dirent_t *s_entry; 1291 const char *s_fullpath, *t_fullpath, *e_fullpath; 1292 1293 svn_pool_clear(iterpool); 1294 1295 if (is_depth_upgrade(wc_depth, requested_depth, t_entry->kind)) 1296 { 1297 /* We're making the working copy deeper, pretend the source 1298 doesn't exist. */ 1299 s_entry = NULL; 1300 s_fullpath = NULL; 1301 } 1302 else 1303 { 1304 if (t_entry->kind == svn_node_file 1305 && requested_depth == svn_depth_unknown 1306 && wc_depth < svn_depth_files) 1307 continue; 1308 1309 if (t_entry->kind == svn_node_dir 1310 && (wc_depth < svn_depth_immediates 1311 || requested_depth == svn_depth_files)) 1312 continue; 1313 1314 /* Look for an entry with the same name in the source dirents. */ 1315 s_entry = s_entries ? 1316 svn_hash_gets(s_entries, t_entry->name) : NULL; 1317 s_fullpath = s_entry ? 1318 svn_fspath__join(s_path, t_entry->name, iterpool) : NULL; 1319 } 1320 1321 /* Compose the report, editor, and target paths for this entry. */ 1322 e_fullpath = svn_relpath_join(e_path, t_entry->name, iterpool); 1323 t_fullpath = svn_fspath__join(t_path, t_entry->name, iterpool); 1324 1325 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, t_fullpath, 1326 t_entry, dir_baton, e_fullpath, NULL, 1327 DEPTH_BELOW_HERE(wc_depth), 1328 DEPTH_BELOW_HERE(requested_depth), 1329 iterpool)); 1330 } 1331 1332 /* iterpool is destroyed by destroying its parent (subpool) below */ 1333 } 1334 1335 svn_pool_destroy(subpool); 1336 1337 return SVN_NO_ERROR; 1338} 1339 1340static svn_error_t * 1341drive(report_baton_t *b, svn_revnum_t s_rev, path_info_t *info, 1342 apr_pool_t *pool) 1343{ 1344 const char *t_anchor, *s_fullpath; 1345 svn_boolean_t allowed, info_is_set_path; 1346 svn_fs_root_t *s_root; 1347 const svn_fs_dirent_t *s_entry, *t_entry; 1348 void *root_baton; 1349 1350 /* Compute the target path corresponding to the working copy anchor, 1351 and check its authorization. */ 1352 t_anchor = *b->s_operand ? svn_fspath__dirname(b->t_path, pool) : b->t_path; 1353 SVN_ERR(check_auth(b, &allowed, t_anchor, pool)); 1354 if (!allowed) 1355 return svn_error_create 1356 (SVN_ERR_AUTHZ_ROOT_UNREADABLE, NULL, 1357 _("Not authorized to open root of edit operation")); 1358 1359 /* Collect information about the source and target nodes. */ 1360 s_fullpath = svn_fspath__join(b->fs_base, b->s_operand, pool); 1361 SVN_ERR(get_source_root(b, &s_root, s_rev)); 1362 SVN_ERR(fake_dirent(&s_entry, s_root, s_fullpath, pool)); 1363 SVN_ERR(fake_dirent(&t_entry, b->t_root, b->t_path, pool)); 1364 1365 /* If the operand is a locally added file or directory, it won't 1366 exist in the source, so accept that. */ 1367 info_is_set_path = (SVN_IS_VALID_REVNUM(info->rev) && !info->link_path); 1368 if (info_is_set_path && !s_entry) 1369 s_fullpath = NULL; 1370 1371 /* Check if the target path exists first. */ 1372 if (!*b->s_operand && !(t_entry)) 1373 return svn_error_createf(SVN_ERR_FS_PATH_SYNTAX, NULL, 1374 _("Target path '%s' does not exist"), 1375 b->t_path); 1376 1377 /* If the anchor is the operand, the source and target must be dirs. 1378 Check this before opening the root to avoid modifying the wc. */ 1379 else if (!*b->s_operand && (!s_entry || s_entry->kind != svn_node_dir 1380 || t_entry->kind != svn_node_dir)) 1381 return svn_error_create(SVN_ERR_FS_PATH_SYNTAX, NULL, 1382 _("Cannot replace a directory from within")); 1383 1384 SVN_ERR(b->editor->set_target_revision(b->edit_baton, b->t_rev, pool)); 1385 SVN_ERR(b->editor->open_root(b->edit_baton, s_rev, pool, &root_baton)); 1386 1387 /* If the anchor is the operand, diff the two directories; otherwise 1388 update the operand within the anchor directory. */ 1389 if (!*b->s_operand) 1390 SVN_ERR(delta_dirs(b, s_rev, s_fullpath, b->t_path, root_baton, 1391 "", info->start_empty, info->depth, b->requested_depth, 1392 pool)); 1393 else 1394 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, b->t_path, 1395 t_entry, root_baton, b->s_operand, info, 1396 info->depth, b->requested_depth, pool)); 1397 1398 return svn_error_trace(b->editor->close_directory(root_baton, pool)); 1399} 1400 1401/* Initialize the baton fields for editor-driving, and drive the editor. */ 1402static svn_error_t * 1403finish_report(report_baton_t *b, apr_pool_t *pool) 1404{ 1405 path_info_t *info; 1406 apr_pool_t *subpool; 1407 svn_revnum_t s_rev; 1408 int i; 1409 1410 /* Save our pool to manage the lookahead and fs_root cache with. */ 1411 b->pool = pool; 1412 1413 /* Add the end marker. */ 1414 SVN_ERR(svn_spillbuf__reader_write(b->reader, "-", 1, pool)); 1415 1416 /* Read the first pathinfo from the report and verify that it is a top-level 1417 set_path entry. */ 1418 SVN_ERR(read_path_info(&info, b->reader, pool)); 1419 if (!info || strcmp(info->path, b->s_operand) != 0 1420 || info->link_path || !SVN_IS_VALID_REVNUM(info->rev)) 1421 return svn_error_create(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 1422 _("Invalid report for top level of working copy")); 1423 s_rev = info->rev; 1424 1425 /* Initialize the lookahead pathinfo. */ 1426 subpool = svn_pool_create(pool); 1427 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 1428 1429 if (b->lookahead && strcmp(b->lookahead->path, b->s_operand) == 0) 1430 { 1431 /* If the operand of the wc operation is switched or deleted, 1432 then info above is just a place-holder, and the only thing we 1433 have to do is pass the revision it contains to open_root. 1434 The next pathinfo actually describes the target. */ 1435 if (!*b->s_operand) 1436 return svn_error_create(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 1437 _("Two top-level reports with no target")); 1438 /* If the client issued a set-path followed by a delete-path, we need 1439 to respect the depth set by the initial set-path. */ 1440 if (! SVN_IS_VALID_REVNUM(b->lookahead->rev)) 1441 { 1442 b->lookahead->depth = info->depth; 1443 } 1444 info = b->lookahead; 1445 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 1446 } 1447 1448 /* Open the target root and initialize the source root cache. */ 1449 SVN_ERR(svn_fs_revision_root(&b->t_root, b->repos->fs, b->t_rev, pool)); 1450 for (i = 0; i < NUM_CACHED_SOURCE_ROOTS; i++) 1451 b->s_roots[i] = NULL; 1452 1453 { 1454 svn_error_t *err = svn_error_trace(drive(b, s_rev, info, pool)); 1455 1456 if (err == SVN_NO_ERROR) 1457 return svn_error_trace(b->editor->close_edit(b->edit_baton, pool)); 1458 1459 return svn_error_trace( 1460 svn_error_compose_create(err, 1461 b->editor->abort_edit(b->edit_baton, 1462 pool))); 1463 } 1464} 1465 1466/* --- COLLECTING THE REPORT INFORMATION --- */ 1467 1468/* Record a report operation into the spill buffer. Return an error 1469 if DEPTH is svn_depth_unknown. */ 1470static svn_error_t * 1471write_path_info(report_baton_t *b, const char *path, const char *lpath, 1472 svn_revnum_t rev, svn_depth_t depth, 1473 svn_boolean_t start_empty, 1474 const char *lock_token, apr_pool_t *pool) 1475{ 1476 const char *lrep, *rrep, *drep, *ltrep, *rep; 1477 1478 /* Munge the path to be anchor-relative, so that we can use edit paths 1479 as report paths. */ 1480 path = svn_relpath_join(b->s_operand, path, pool); 1481 1482 lrep = lpath ? apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s", 1483 strlen(lpath), lpath) : "-"; 1484 rrep = (SVN_IS_VALID_REVNUM(rev)) ? 1485 apr_psprintf(pool, "+%ld:", rev) : "-"; 1486 1487 if (depth == svn_depth_exclude) 1488 drep = "+X"; 1489 else if (depth == svn_depth_empty) 1490 drep = "+E"; 1491 else if (depth == svn_depth_files) 1492 drep = "+F"; 1493 else if (depth == svn_depth_immediates) 1494 drep = "+M"; 1495 else if (depth == svn_depth_infinity) 1496 drep = "-"; 1497 else 1498 return svn_error_createf(SVN_ERR_REPOS_BAD_ARGS, NULL, 1499 _("Unsupported report depth '%s'"), 1500 svn_depth_to_word(depth)); 1501 1502 ltrep = lock_token ? apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s", 1503 strlen(lock_token), lock_token) : "-"; 1504 rep = apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s%s%s%s%c%s", 1505 strlen(path), path, lrep, rrep, drep, 1506 start_empty ? '+' : '-', ltrep); 1507 return svn_error_trace( 1508 svn_spillbuf__reader_write(b->reader, rep, strlen(rep), pool)); 1509} 1510 1511svn_error_t * 1512svn_repos_set_path3(void *baton, const char *path, svn_revnum_t rev, 1513 svn_depth_t depth, svn_boolean_t start_empty, 1514 const char *lock_token, apr_pool_t *pool) 1515{ 1516 return svn_error_trace( 1517 write_path_info(baton, path, NULL, rev, depth, start_empty, 1518 lock_token, pool)); 1519} 1520 1521svn_error_t * 1522svn_repos_link_path3(void *baton, const char *path, const char *link_path, 1523 svn_revnum_t rev, svn_depth_t depth, 1524 svn_boolean_t start_empty, 1525 const char *lock_token, apr_pool_t *pool) 1526{ 1527 if (depth == svn_depth_exclude) 1528 return svn_error_create(SVN_ERR_REPOS_BAD_ARGS, NULL, 1529 _("Depth 'exclude' not supported for link")); 1530 1531 return svn_error_trace( 1532 write_path_info(baton, path, link_path, rev, depth, 1533 start_empty, lock_token, pool)); 1534} 1535 1536svn_error_t * 1537svn_repos_delete_path(void *baton, const char *path, apr_pool_t *pool) 1538{ 1539 /* We pass svn_depth_infinity because deletion of a path always 1540 deletes everything underneath it. */ 1541 return svn_error_trace( 1542 write_path_info(baton, path, NULL, SVN_INVALID_REVNUM, 1543 svn_depth_infinity, FALSE, NULL, pool)); 1544} 1545 1546svn_error_t * 1547svn_repos_finish_report(void *baton, apr_pool_t *pool) 1548{ 1549 report_baton_t *b = baton; 1550 1551 return svn_error_trace(finish_report(b, pool)); 1552} 1553 1554svn_error_t * 1555svn_repos_abort_report(void *baton, apr_pool_t *pool) 1556{ 1557 return SVN_NO_ERROR; 1558} 1559 1560/* --- BEGINNING THE REPORT --- */ 1561 1562 1563svn_error_t * 1564svn_repos_begin_report3(void **report_baton, 1565 svn_revnum_t revnum, 1566 svn_repos_t *repos, 1567 const char *fs_base, 1568 const char *s_operand, 1569 const char *switch_path, 1570 svn_boolean_t text_deltas, 1571 svn_depth_t depth, 1572 svn_boolean_t ignore_ancestry, 1573 svn_boolean_t send_copyfrom_args, 1574 const svn_delta_editor_t *editor, 1575 void *edit_baton, 1576 svn_repos_authz_func_t authz_read_func, 1577 void *authz_read_baton, 1578 apr_size_t zero_copy_limit, 1579 apr_pool_t *pool) 1580{ 1581 report_baton_t *b; 1582 const char *uuid; 1583 1584 if (depth == svn_depth_exclude) 1585 return svn_error_create(SVN_ERR_REPOS_BAD_ARGS, NULL, 1586 _("Request depth 'exclude' not supported")); 1587 1588 SVN_ERR(svn_fs_get_uuid(repos->fs, &uuid, pool)); 1589 1590 /* Build a reporter baton. Copy strings in case the caller doesn't 1591 keep track of them. */ 1592 b = apr_palloc(pool, sizeof(*b)); 1593 b->repos = repos; 1594 b->fs_base = svn_fspath__canonicalize(fs_base, pool); 1595 b->s_operand = apr_pstrdup(pool, s_operand); 1596 b->t_rev = revnum; 1597 b->t_path = switch_path ? svn_fspath__canonicalize(switch_path, pool) 1598 : svn_fspath__join(b->fs_base, s_operand, pool); 1599 b->text_deltas = text_deltas; 1600 b->zero_copy_limit = zero_copy_limit; 1601 b->requested_depth = depth; 1602 b->ignore_ancestry = ignore_ancestry; 1603 b->send_copyfrom_args = send_copyfrom_args; 1604 b->is_switch = (switch_path != NULL); 1605 b->editor = editor; 1606 b->edit_baton = edit_baton; 1607 b->authz_read_func = authz_read_func; 1608 b->authz_read_baton = authz_read_baton; 1609 b->revision_infos = apr_hash_make(pool); 1610 b->pool = pool; 1611 b->reader = svn_spillbuf__reader_create(1000 /* blocksize */, 1612 1000000 /* maxsize */, 1613 pool); 1614 b->repos_uuid = svn_string_create(uuid, pool); 1615 1616 /* Hand reporter back to client. */ 1617 *report_baton = b; 1618 return SVN_NO_ERROR; 1619} 1620