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 = cdate ? svn_string_dup(cdate, b->pool) : NULL; 499 info->author = author ? svn_string_dup(author, b->pool) : NULL; 500 501 /* Cache it */ 502 apr_hash_set(b->revision_infos, &info->rev, sizeof(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_changed(&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 void *key; 607 void *val; 608 609 apr_hash_this(hi, &key, NULL, &val); 610 SVN_ERR(change_fn(b, object, key, val, pool)); 611 } 612 } 613 614 return SVN_NO_ERROR; 615} 616 617/* Baton type to be passed into send_zero_copy_delta. 618 */ 619typedef struct zero_copy_baton_t 620{ 621 /* don't process data larger than this limit */ 622 apr_size_t zero_copy_limit; 623 624 /* window handler and baton to send the data to */ 625 svn_txdelta_window_handler_t dhandler; 626 void *dbaton; 627 628 /* return value: will be set to TRUE, if the data was processed. */ 629 svn_boolean_t zero_copy_succeeded; 630} zero_copy_baton_t; 631 632/* Implement svn_fs_process_contents_func_t. If LEN is smaller than the 633 * limit given in *BATON, send the CONTENTS as an delta windows to the 634 * handler given in BATON and set the ZERO_COPY_SUCCEEDED flag in that 635 * BATON. Otherwise, reset it to FALSE. 636 * Use POOL for temporary allocations. 637 */ 638static svn_error_t * 639send_zero_copy_delta(const unsigned char *contents, 640 apr_size_t len, 641 void *baton, 642 apr_pool_t *pool) 643{ 644 zero_copy_baton_t *zero_copy_baton = baton; 645 646 /* if the item is too large, the caller must revert to traditional 647 streaming code. */ 648 if (len > zero_copy_baton->zero_copy_limit) 649 { 650 zero_copy_baton->zero_copy_succeeded = FALSE; 651 return SVN_NO_ERROR; 652 } 653 654 SVN_ERR(svn_txdelta_send_contents(contents, len, 655 zero_copy_baton->dhandler, 656 zero_copy_baton->dbaton, pool)); 657 658 /* all fine now */ 659 zero_copy_baton->zero_copy_succeeded = TRUE; 660 return SVN_NO_ERROR; 661} 662 663 664/* Make the appropriate edits on FILE_BATON to change its contents and 665 properties from those in S_REV/S_PATH to those in B->t_root/T_PATH, 666 possibly using LOCK_TOKEN to determine if the client's lock on the file 667 is defunct. */ 668static svn_error_t * 669delta_files(report_baton_t *b, void *file_baton, svn_revnum_t s_rev, 670 const char *s_path, const char *t_path, const char *lock_token, 671 apr_pool_t *pool) 672{ 673 svn_boolean_t changed; 674 svn_fs_root_t *s_root = NULL; 675 svn_txdelta_stream_t *dstream = NULL; 676 svn_checksum_t *s_checksum; 677 const char *s_hex_digest = NULL; 678 svn_txdelta_window_handler_t dhandler; 679 void *dbaton; 680 681 /* Compare the files' property lists. */ 682 SVN_ERR(delta_proplists(b, s_rev, s_path, t_path, lock_token, 683 change_file_prop, file_baton, pool)); 684 685 if (s_path) 686 { 687 SVN_ERR(get_source_root(b, &s_root, s_rev)); 688 689 /* We're not interested in the theoretical difference between "has 690 contents which have not changed with respect to" and "has the same 691 actual contents as" when sending text-deltas. If we know the 692 delta is an empty one, we avoiding sending it in either case. */ 693 SVN_ERR(svn_repos__compare_files(&changed, b->t_root, t_path, 694 s_root, s_path, pool)); 695 696 if (!changed) 697 return SVN_NO_ERROR; 698 699 SVN_ERR(svn_fs_file_checksum(&s_checksum, svn_checksum_md5, s_root, 700 s_path, TRUE, pool)); 701 s_hex_digest = svn_checksum_to_cstring(s_checksum, pool); 702 } 703 704 /* Send the delta stream if desired, or just a NULL window if not. */ 705 SVN_ERR(b->editor->apply_textdelta(file_baton, s_hex_digest, pool, 706 &dhandler, &dbaton)); 707 708 if (dhandler != svn_delta_noop_window_handler) 709 { 710 if (b->text_deltas) 711 { 712 /* if we send deltas against empty streams, we may use our 713 zero-copy code. */ 714 if (b->zero_copy_limit > 0 && s_path == NULL) 715 { 716 zero_copy_baton_t baton; 717 svn_boolean_t called = FALSE; 718 719 baton.zero_copy_limit = b->zero_copy_limit; 720 baton.dhandler = dhandler; 721 baton.dbaton = dbaton; 722 baton.zero_copy_succeeded = FALSE; 723 SVN_ERR(svn_fs_try_process_file_contents(&called, 724 b->t_root, t_path, 725 send_zero_copy_delta, 726 &baton, pool)); 727 728 /* data has been available and small enough, 729 i.e. been processed? */ 730 if (called && baton.zero_copy_succeeded) 731 return SVN_NO_ERROR; 732 } 733 734 SVN_ERR(svn_fs_get_file_delta_stream(&dstream, s_root, s_path, 735 b->t_root, t_path, pool)); 736 SVN_ERR(svn_txdelta_send_txstream(dstream, dhandler, dbaton, pool)); 737 } 738 else 739 SVN_ERR(dhandler(NULL, dbaton)); 740 } 741 742 return SVN_NO_ERROR; 743} 744 745/* Determine if the user is authorized to view B->t_root/PATH. */ 746static svn_error_t * 747check_auth(report_baton_t *b, svn_boolean_t *allowed, const char *path, 748 apr_pool_t *pool) 749{ 750 if (b->authz_read_func) 751 return svn_error_trace(b->authz_read_func(allowed, b->t_root, path, 752 b->authz_read_baton, pool)); 753 *allowed = TRUE; 754 return SVN_NO_ERROR; 755} 756 757/* Create a dirent in *ENTRY for the given ROOT and PATH. We use this to 758 replace the source or target dirent when a report pathinfo tells us to 759 change paths or revisions. */ 760static svn_error_t * 761fake_dirent(const svn_fs_dirent_t **entry, svn_fs_root_t *root, 762 const char *path, apr_pool_t *pool) 763{ 764 svn_node_kind_t kind; 765 svn_fs_dirent_t *ent; 766 767 SVN_ERR(svn_fs_check_path(&kind, root, path, pool)); 768 if (kind == svn_node_none) 769 *entry = NULL; 770 else 771 { 772 ent = apr_palloc(pool, sizeof(**entry)); 773 /* ### All callers should be updated to pass just one of these 774 formats */ 775 ent->name = (*path == '/') ? svn_fspath__basename(path, pool) 776 : svn_relpath_basename(path, pool); 777 SVN_ERR(svn_fs_node_id(&ent->id, root, path, pool)); 778 ent->kind = kind; 779 *entry = ent; 780 } 781 return SVN_NO_ERROR; 782} 783 784 785/* Given REQUESTED_DEPTH, WC_DEPTH and the current entry's KIND, 786 determine whether we need to send the whole entry, not just deltas. 787 Please refer to delta_dirs' docstring for an explanation of the 788 conditionals below. */ 789static svn_boolean_t 790is_depth_upgrade(svn_depth_t wc_depth, 791 svn_depth_t requested_depth, 792 svn_node_kind_t kind) 793{ 794 if (requested_depth == svn_depth_unknown 795 || requested_depth <= wc_depth 796 || wc_depth == svn_depth_immediates) 797 return FALSE; 798 799 if (kind == svn_node_file 800 && wc_depth == svn_depth_files) 801 return FALSE; 802 803 if (kind == svn_node_dir 804 && wc_depth == svn_depth_empty 805 && requested_depth == svn_depth_files) 806 return FALSE; 807 808 return TRUE; 809} 810 811 812/* Call the B->editor's add_file() function to create PATH as a child 813 of PARENT_BATON, returning a new baton in *NEW_FILE_BATON. 814 However, make an attempt to send 'copyfrom' arguments if they're 815 available, by examining the closest copy of the original file 816 O_PATH within B->t_root. If any copyfrom args are discovered, 817 return those in *COPYFROM_PATH and *COPYFROM_REV; otherwise leave 818 those return args untouched. */ 819static svn_error_t * 820add_file_smartly(report_baton_t *b, 821 const char *path, 822 void *parent_baton, 823 const char *o_path, 824 void **new_file_baton, 825 const char **copyfrom_path, 826 svn_revnum_t *copyfrom_rev, 827 apr_pool_t *pool) 828{ 829 /* ### TODO: use a subpool to do this work, clear it at the end? */ 830 svn_fs_t *fs = svn_repos_fs(b->repos); 831 svn_fs_root_t *closest_copy_root = NULL; 832 const char *closest_copy_path = NULL; 833 834 /* Pre-emptively assume no copyfrom args exist. */ 835 *copyfrom_path = NULL; 836 *copyfrom_rev = SVN_INVALID_REVNUM; 837 838 if (b->send_copyfrom_args) 839 { 840 /* Find the destination of the nearest 'copy event' which may have 841 caused o_path@t_root to exist. svn_fs_closest_copy only returns paths 842 starting with '/', so make sure o_path always starts with a '/' 843 too. */ 844 if (*o_path != '/') 845 o_path = apr_pstrcat(pool, "/", o_path, (char *)NULL); 846 847 SVN_ERR(svn_fs_closest_copy(&closest_copy_root, &closest_copy_path, 848 b->t_root, o_path, pool)); 849 if (closest_copy_root != NULL) 850 { 851 /* If the destination of the copy event is the same path as 852 o_path, then we've found something interesting that should 853 have 'copyfrom' history. */ 854 if (strcmp(closest_copy_path, o_path) == 0) 855 { 856 SVN_ERR(svn_fs_copied_from(copyfrom_rev, copyfrom_path, 857 closest_copy_root, closest_copy_path, 858 pool)); 859 if (b->authz_read_func) 860 { 861 svn_boolean_t allowed; 862 svn_fs_root_t *copyfrom_root; 863 SVN_ERR(svn_fs_revision_root(©from_root, fs, 864 *copyfrom_rev, pool)); 865 SVN_ERR(b->authz_read_func(&allowed, copyfrom_root, 866 *copyfrom_path, b->authz_read_baton, 867 pool)); 868 if (! allowed) 869 { 870 *copyfrom_path = NULL; 871 *copyfrom_rev = SVN_INVALID_REVNUM; 872 } 873 } 874 } 875 } 876 } 877 878 return svn_error_trace(b->editor->add_file(path, parent_baton, 879 *copyfrom_path, *copyfrom_rev, 880 pool, new_file_baton)); 881} 882 883 884/* Emit a series of editing operations to transform a source entry to 885 a target entry. 886 887 S_REV and S_PATH specify the source entry. S_ENTRY contains the 888 already-looked-up information about the node-revision existing at 889 that location. S_PATH and S_ENTRY may be NULL if the entry does 890 not exist in the source. S_PATH may be non-NULL and S_ENTRY may be 891 NULL if the caller expects INFO to modify the source to an existing 892 location. 893 894 B->t_root and T_PATH specify the target entry. T_ENTRY contains 895 the already-looked-up information about the node-revision existing 896 at that location. T_PATH and T_ENTRY may be NULL if the entry does 897 not exist in the target. 898 899 DIR_BATON and E_PATH contain the parameters which should be passed 900 to the editor calls--DIR_BATON for the parent directory baton and 901 E_PATH for the pathname. (E_PATH is the anchor-relative working 902 copy pathname, which may differ from the source and target 903 pathnames if the report contains a link_path.) 904 905 INFO contains the report information for this working copy path, or 906 NULL if there is none. This function will internally modify the 907 source and target entries as appropriate based on the report 908 information. 909 910 WC_DEPTH and REQUESTED_DEPTH are propagated to delta_dirs() if 911 necessary. Refer to delta_dirs' docstring to find out what 912 should happen for various combinations of WC_DEPTH/REQUESTED_DEPTH. */ 913static svn_error_t * 914update_entry(report_baton_t *b, svn_revnum_t s_rev, const char *s_path, 915 const svn_fs_dirent_t *s_entry, const char *t_path, 916 const svn_fs_dirent_t *t_entry, void *dir_baton, 917 const char *e_path, path_info_t *info, svn_depth_t wc_depth, 918 svn_depth_t requested_depth, apr_pool_t *pool) 919{ 920 svn_fs_root_t *s_root; 921 svn_boolean_t allowed, related; 922 void *new_baton; 923 svn_checksum_t *checksum; 924 const char *hex_digest; 925 926 /* For non-switch operations, follow link_path in the target. */ 927 if (info && info->link_path && !b->is_switch) 928 { 929 t_path = info->link_path; 930 SVN_ERR(fake_dirent(&t_entry, b->t_root, t_path, pool)); 931 } 932 933 if (info && !SVN_IS_VALID_REVNUM(info->rev)) 934 { 935 /* Delete this entry in the source. */ 936 s_path = NULL; 937 s_entry = NULL; 938 } 939 else if (info && s_path) 940 { 941 /* Follow the rev and possibly path in this entry. */ 942 s_path = (info->link_path) ? info->link_path : s_path; 943 s_rev = info->rev; 944 SVN_ERR(get_source_root(b, &s_root, s_rev)); 945 SVN_ERR(fake_dirent(&s_entry, s_root, s_path, pool)); 946 } 947 948 /* Don't let the report carry us somewhere nonexistent. */ 949 if (s_path && !s_entry) 950 return svn_error_createf(SVN_ERR_FS_NOT_FOUND, NULL, 951 _("Working copy path '%s' does not exist in " 952 "repository"), e_path); 953 954 /* If the source and target both exist and are of the same kind, 955 then find out whether they're related. If they're exactly the 956 same, then we don't have to do anything (unless the report has 957 changes to the source). If we're ignoring ancestry, then any two 958 nodes of the same type are related enough for us. */ 959 related = FALSE; 960 if (s_entry && t_entry && s_entry->kind == t_entry->kind) 961 { 962 int distance = svn_fs_compare_ids(s_entry->id, t_entry->id); 963 if (distance == 0 && !any_path_info(b, e_path) 964 && (requested_depth <= wc_depth || t_entry->kind == svn_node_file)) 965 { 966 if (!info) 967 return SVN_NO_ERROR; 968 969 if (!info->start_empty) 970 { 971 svn_lock_t *lock; 972 973 if (!info->lock_token) 974 return SVN_NO_ERROR; 975 976 SVN_ERR(svn_fs_get_lock(&lock, b->repos->fs, t_path, pool)); 977 if (lock && (strcmp(lock->token, info->lock_token) == 0)) 978 return SVN_NO_ERROR; 979 } 980 } 981 982 related = (distance != -1 || b->ignore_ancestry); 983 } 984 985 /* If there's a source and it's not related to the target, nuke it. */ 986 if (s_entry && !related) 987 { 988 svn_revnum_t deleted_rev; 989 990 SVN_ERR(svn_repos_deleted_rev(svn_fs_root_fs(b->t_root), t_path, 991 s_rev, b->t_rev, &deleted_rev, 992 pool)); 993 994 if (!SVN_IS_VALID_REVNUM(deleted_rev)) 995 { 996 /* Two possibilities: either the thing doesn't exist in S_REV; or 997 it wasn't deleted between S_REV and B->T_REV. In the first case, 998 I think we should leave DELETED_REV as SVN_INVALID_REVNUM, but 999 in the second, it should be set to B->T_REV-1 for the call to 1000 delete_entry() below. */ 1001 svn_node_kind_t kind; 1002 1003 SVN_ERR(svn_fs_check_path(&kind, b->t_root, t_path, pool)); 1004 if (kind != svn_node_none) 1005 deleted_rev = b->t_rev - 1; 1006 } 1007 1008 SVN_ERR(b->editor->delete_entry(e_path, deleted_rev, dir_baton, 1009 pool)); 1010 s_path = NULL; 1011 } 1012 1013 /* If there's no target, we have nothing more to do. */ 1014 if (!t_entry) 1015 return svn_error_trace(skip_path_info(b, e_path)); 1016 1017 /* Check if the user is authorized to find out about the target. */ 1018 SVN_ERR(check_auth(b, &allowed, t_path, pool)); 1019 if (!allowed) 1020 { 1021 if (t_entry->kind == svn_node_dir) 1022 SVN_ERR(b->editor->absent_directory(e_path, dir_baton, pool)); 1023 else 1024 SVN_ERR(b->editor->absent_file(e_path, dir_baton, pool)); 1025 return svn_error_trace(skip_path_info(b, e_path)); 1026 } 1027 1028 if (t_entry->kind == svn_node_dir) 1029 { 1030 if (related) 1031 SVN_ERR(b->editor->open_directory(e_path, dir_baton, s_rev, pool, 1032 &new_baton)); 1033 else 1034 SVN_ERR(b->editor->add_directory(e_path, dir_baton, NULL, 1035 SVN_INVALID_REVNUM, pool, 1036 &new_baton)); 1037 1038 SVN_ERR(delta_dirs(b, s_rev, s_path, t_path, new_baton, e_path, 1039 info ? info->start_empty : FALSE, 1040 wc_depth, requested_depth, pool)); 1041 return svn_error_trace(b->editor->close_directory(new_baton, pool)); 1042 } 1043 else 1044 { 1045 if (related) 1046 { 1047 SVN_ERR(b->editor->open_file(e_path, dir_baton, s_rev, pool, 1048 &new_baton)); 1049 SVN_ERR(delta_files(b, new_baton, s_rev, s_path, t_path, 1050 info ? info->lock_token : NULL, pool)); 1051 } 1052 else 1053 { 1054 svn_revnum_t copyfrom_rev = SVN_INVALID_REVNUM; 1055 const char *copyfrom_path = NULL; 1056 SVN_ERR(add_file_smartly(b, e_path, dir_baton, t_path, &new_baton, 1057 ©from_path, ©from_rev, pool)); 1058 if (! copyfrom_path) 1059 /* Send txdelta between empty file (s_path@s_rev doesn't 1060 exist) and added file (t_path@t_root). */ 1061 SVN_ERR(delta_files(b, new_baton, s_rev, s_path, t_path, 1062 info ? info->lock_token : NULL, pool)); 1063 else 1064 /* Send txdelta between copied file (copyfrom_path@copyfrom_rev) 1065 and added file (tpath@t_root). */ 1066 SVN_ERR(delta_files(b, new_baton, copyfrom_rev, copyfrom_path, 1067 t_path, info ? info->lock_token : NULL, pool)); 1068 } 1069 1070 SVN_ERR(svn_fs_file_checksum(&checksum, svn_checksum_md5, b->t_root, 1071 t_path, TRUE, pool)); 1072 hex_digest = svn_checksum_to_cstring(checksum, pool); 1073 return svn_error_trace(b->editor->close_file(new_baton, hex_digest, 1074 pool)); 1075 } 1076} 1077 1078/* A helper macro for when we have to recurse into subdirectories. */ 1079#define DEPTH_BELOW_HERE(depth) ((depth) == svn_depth_immediates) ? \ 1080 svn_depth_empty : (depth) 1081 1082/* Emit edits within directory DIR_BATON (with corresponding path 1083 E_PATH) with the changes from the directory S_REV/S_PATH to the 1084 directory B->t_rev/T_PATH. S_PATH may be NULL if the entry does 1085 not exist in the source. 1086 1087 WC_DEPTH is this path's depth as reported by set_path/link_path. 1088 REQUESTED_DEPTH is derived from the depth set by 1089 svn_repos_begin_report(). 1090 1091 When iterating over this directory's entries, the following tables 1092 describe what happens for all possible combinations 1093 of WC_DEPTH/REQUESTED_DEPTH (rows represent WC_DEPTH, columns 1094 represent REQUESTED_DEPTH): 1095 1096 Legend: 1097 X: ignore this entry (it's either below the requested depth, or 1098 if the requested depth is svn_depth_unknown, below the working 1099 copy depth) 1100 o: handle this entry normally 1101 U: handle the entry as if it were a newly added repository path 1102 (the client is upgrading to a deeper wc and doesn't currently 1103 have this entry, but it should be there after the upgrade, so we 1104 need to send the whole thing, not just deltas) 1105 1106 For files: 1107 ______________________________________________________________ 1108 | req. depth| unknown | empty | files | immediates | infinity | 1109 |wc. depth | | | | | | 1110 |___________|_________|_______|_______|____________|__________| 1111 |empty | X | X | U | U | U | 1112 |___________|_________|_______|_______|____________|__________| 1113 |files | o | X | o | o | o | 1114 |___________|_________|_______|_______|____________|__________| 1115 |immediates | o | X | o | o | o | 1116 |___________|_________|_______|_______|____________|__________| 1117 |infinity | o | X | o | o | o | 1118 |___________|_________|_______|_______|____________|__________| 1119 1120 For directories: 1121 ______________________________________________________________ 1122 | req. depth| unknown | empty | files | immediates | infinity | 1123 |wc. depth | | | | | | 1124 |___________|_________|_______|_______|____________|__________| 1125 |empty | X | X | X | U | U | 1126 |___________|_________|_______|_______|____________|__________| 1127 |files | X | X | X | U | U | 1128 |___________|_________|_______|_______|____________|__________| 1129 |immediates | o | X | X | o | o | 1130 |___________|_________|_______|_______|____________|__________| 1131 |infinity | o | X | X | o | o | 1132 |___________|_________|_______|_______|____________|__________| 1133 1134 These rules are enforced by the is_depth_upgrade() function and by 1135 various other checks below. 1136*/ 1137static svn_error_t * 1138delta_dirs(report_baton_t *b, svn_revnum_t s_rev, const char *s_path, 1139 const char *t_path, void *dir_baton, const char *e_path, 1140 svn_boolean_t start_empty, svn_depth_t wc_depth, 1141 svn_depth_t requested_depth, apr_pool_t *pool) 1142{ 1143 svn_fs_root_t *s_root; 1144 apr_hash_t *s_entries = NULL, *t_entries; 1145 apr_hash_index_t *hi; 1146 apr_pool_t *subpool; 1147 const char *name, *s_fullpath, *t_fullpath, *e_fullpath; 1148 path_info_t *info; 1149 1150 /* Compare the property lists. If we're starting empty, pass a NULL 1151 source path so that we add all the properties. 1152 1153 When we support directory locks, we must pass the lock token here. */ 1154 SVN_ERR(delta_proplists(b, s_rev, start_empty ? NULL : s_path, t_path, 1155 NULL, change_dir_prop, dir_baton, pool)); 1156 1157 if (requested_depth > svn_depth_empty 1158 || requested_depth == svn_depth_unknown) 1159 { 1160 /* Get the list of entries in each of source and target. */ 1161 if (s_path && !start_empty) 1162 { 1163 SVN_ERR(get_source_root(b, &s_root, s_rev)); 1164 SVN_ERR(svn_fs_dir_entries(&s_entries, s_root, s_path, pool)); 1165 } 1166 SVN_ERR(svn_fs_dir_entries(&t_entries, b->t_root, t_path, pool)); 1167 1168 /* Iterate over the report information for this directory. */ 1169 subpool = svn_pool_create(pool); 1170 1171 while (1) 1172 { 1173 const svn_fs_dirent_t *s_entry, *t_entry; 1174 1175 svn_pool_clear(subpool); 1176 SVN_ERR(fetch_path_info(b, &name, &info, e_path, subpool)); 1177 if (!name) 1178 break; 1179 1180 /* Invalid revnum means we should delete, unless this is 1181 just an excluded subpath. */ 1182 if (info 1183 && !SVN_IS_VALID_REVNUM(info->rev) 1184 && info->depth != svn_depth_exclude) 1185 { 1186 /* We want to perform deletes before non-replacement adds, 1187 for graceful handling of case-only renames on 1188 case-insensitive client filesystems. So, if the report 1189 item is a delete, remove the entry from the source hash, 1190 but don't update the entry yet. */ 1191 if (s_entries) 1192 svn_hash_sets(s_entries, name, NULL); 1193 continue; 1194 } 1195 1196 e_fullpath = svn_relpath_join(e_path, name, subpool); 1197 t_fullpath = svn_fspath__join(t_path, name, subpool); 1198 t_entry = svn_hash_gets(t_entries, name); 1199 s_fullpath = s_path ? svn_fspath__join(s_path, name, subpool) : NULL; 1200 s_entry = s_entries ? 1201 svn_hash_gets(s_entries, name) : NULL; 1202 1203 /* The only special cases here are 1204 1205 - When requested_depth is files but the reported path is 1206 a directory. This is technically a client error, but we 1207 handle it anyway, by skipping the entry. 1208 1209 - When the reported depth is svn_depth_exclude. 1210 */ 1211 if ((! info || info->depth != svn_depth_exclude) 1212 && (requested_depth != svn_depth_files 1213 || ((! t_entry || t_entry->kind != svn_node_dir) 1214 && (! s_entry || s_entry->kind != svn_node_dir)))) 1215 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, t_fullpath, 1216 t_entry, dir_baton, e_fullpath, info, 1217 info ? info->depth 1218 : DEPTH_BELOW_HERE(wc_depth), 1219 DEPTH_BELOW_HERE(requested_depth), subpool)); 1220 1221 /* Don't revisit this name in the target or source entries. */ 1222 svn_hash_sets(t_entries, name, NULL); 1223 if (s_entries 1224 /* Keep the entry for later process if it is reported as 1225 excluded and got deleted in repos. */ 1226 && (! info || info->depth != svn_depth_exclude || t_entry)) 1227 svn_hash_sets(s_entries, name, NULL); 1228 1229 /* pathinfo entries live in their own subpools due to lookahead, 1230 so we need to clear each one out as we finish with it. */ 1231 if (info) 1232 svn_pool_destroy(info->pool); 1233 } 1234 1235 /* Remove any deleted entries. Do this before processing the 1236 target, for graceful handling of case-only renames. */ 1237 if (s_entries) 1238 { 1239 for (hi = apr_hash_first(pool, s_entries); 1240 hi; 1241 hi = apr_hash_next(hi)) 1242 { 1243 const svn_fs_dirent_t *s_entry; 1244 1245 svn_pool_clear(subpool); 1246 s_entry = svn__apr_hash_index_val(hi); 1247 1248 if (svn_hash_gets(t_entries, s_entry->name) == NULL) 1249 { 1250 svn_revnum_t deleted_rev; 1251 1252 if (s_entry->kind == svn_node_file 1253 && wc_depth < svn_depth_files) 1254 continue; 1255 1256 if (s_entry->kind == svn_node_dir 1257 && (wc_depth < svn_depth_immediates 1258 || requested_depth == svn_depth_files)) 1259 continue; 1260 1261 /* There is no corresponding target entry, so delete. */ 1262 e_fullpath = svn_relpath_join(e_path, s_entry->name, subpool); 1263 SVN_ERR(svn_repos_deleted_rev(svn_fs_root_fs(b->t_root), 1264 svn_fspath__join(t_path, 1265 s_entry->name, 1266 subpool), 1267 s_rev, b->t_rev, 1268 &deleted_rev, subpool)); 1269 1270 SVN_ERR(b->editor->delete_entry(e_fullpath, 1271 deleted_rev, 1272 dir_baton, subpool)); 1273 } 1274 } 1275 } 1276 1277 /* Loop over the dirents in the target. */ 1278 for (hi = apr_hash_first(pool, t_entries); hi; hi = apr_hash_next(hi)) 1279 { 1280 const svn_fs_dirent_t *s_entry, *t_entry; 1281 1282 svn_pool_clear(subpool); 1283 t_entry = svn__apr_hash_index_val(hi); 1284 1285 if (is_depth_upgrade(wc_depth, requested_depth, t_entry->kind)) 1286 { 1287 /* We're making the working copy deeper, pretend the source 1288 doesn't exist. */ 1289 s_entry = NULL; 1290 s_fullpath = NULL; 1291 } 1292 else 1293 { 1294 if (t_entry->kind == svn_node_file 1295 && requested_depth == svn_depth_unknown 1296 && wc_depth < svn_depth_files) 1297 continue; 1298 1299 if (t_entry->kind == svn_node_dir 1300 && (wc_depth < svn_depth_immediates 1301 || requested_depth == svn_depth_files)) 1302 continue; 1303 1304 /* Look for an entry with the same name 1305 in the source dirents. */ 1306 s_entry = s_entries ? 1307 svn_hash_gets(s_entries, t_entry->name) 1308 : NULL; 1309 s_fullpath = s_entry ? 1310 svn_fspath__join(s_path, t_entry->name, subpool) : NULL; 1311 } 1312 1313 /* Compose the report, editor, and target paths for this entry. */ 1314 e_fullpath = svn_relpath_join(e_path, t_entry->name, subpool); 1315 t_fullpath = svn_fspath__join(t_path, t_entry->name, subpool); 1316 1317 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, t_fullpath, 1318 t_entry, dir_baton, e_fullpath, NULL, 1319 DEPTH_BELOW_HERE(wc_depth), 1320 DEPTH_BELOW_HERE(requested_depth), 1321 subpool)); 1322 } 1323 1324 1325 /* Destroy iteration subpool. */ 1326 svn_pool_destroy(subpool); 1327 } 1328 return SVN_NO_ERROR; 1329} 1330 1331static svn_error_t * 1332drive(report_baton_t *b, svn_revnum_t s_rev, path_info_t *info, 1333 apr_pool_t *pool) 1334{ 1335 const char *t_anchor, *s_fullpath; 1336 svn_boolean_t allowed, info_is_set_path; 1337 svn_fs_root_t *s_root; 1338 const svn_fs_dirent_t *s_entry, *t_entry; 1339 void *root_baton; 1340 1341 /* Compute the target path corresponding to the working copy anchor, 1342 and check its authorization. */ 1343 t_anchor = *b->s_operand ? svn_fspath__dirname(b->t_path, pool) : b->t_path; 1344 SVN_ERR(check_auth(b, &allowed, t_anchor, pool)); 1345 if (!allowed) 1346 return svn_error_create 1347 (SVN_ERR_AUTHZ_ROOT_UNREADABLE, NULL, 1348 _("Not authorized to open root of edit operation")); 1349 1350 /* Collect information about the source and target nodes. */ 1351 s_fullpath = svn_fspath__join(b->fs_base, b->s_operand, pool); 1352 SVN_ERR(get_source_root(b, &s_root, s_rev)); 1353 SVN_ERR(fake_dirent(&s_entry, s_root, s_fullpath, pool)); 1354 SVN_ERR(fake_dirent(&t_entry, b->t_root, b->t_path, pool)); 1355 1356 /* If the operand is a locally added file or directory, it won't 1357 exist in the source, so accept that. */ 1358 info_is_set_path = (SVN_IS_VALID_REVNUM(info->rev) && !info->link_path); 1359 if (info_is_set_path && !s_entry) 1360 s_fullpath = NULL; 1361 1362 /* Check if the target path exists first. */ 1363 if (!*b->s_operand && !(t_entry)) 1364 return svn_error_createf(SVN_ERR_FS_PATH_SYNTAX, NULL, 1365 _("Target path '%s' does not exist"), 1366 b->t_path); 1367 1368 /* If the anchor is the operand, the source and target must be dirs. 1369 Check this before opening the root to avoid modifying the wc. */ 1370 else if (!*b->s_operand && (!s_entry || s_entry->kind != svn_node_dir 1371 || t_entry->kind != svn_node_dir)) 1372 return svn_error_create(SVN_ERR_FS_PATH_SYNTAX, NULL, 1373 _("Cannot replace a directory from within")); 1374 1375 SVN_ERR(b->editor->set_target_revision(b->edit_baton, b->t_rev, pool)); 1376 SVN_ERR(b->editor->open_root(b->edit_baton, s_rev, pool, &root_baton)); 1377 1378 /* If the anchor is the operand, diff the two directories; otherwise 1379 update the operand within the anchor directory. */ 1380 if (!*b->s_operand) 1381 SVN_ERR(delta_dirs(b, s_rev, s_fullpath, b->t_path, root_baton, 1382 "", info->start_empty, info->depth, b->requested_depth, 1383 pool)); 1384 else 1385 SVN_ERR(update_entry(b, s_rev, s_fullpath, s_entry, b->t_path, 1386 t_entry, root_baton, b->s_operand, info, 1387 info->depth, b->requested_depth, pool)); 1388 1389 return svn_error_trace(b->editor->close_directory(root_baton, pool)); 1390} 1391 1392/* Initialize the baton fields for editor-driving, and drive the editor. */ 1393static svn_error_t * 1394finish_report(report_baton_t *b, apr_pool_t *pool) 1395{ 1396 path_info_t *info; 1397 apr_pool_t *subpool; 1398 svn_revnum_t s_rev; 1399 int i; 1400 1401 /* Save our pool to manage the lookahead and fs_root cache with. */ 1402 b->pool = pool; 1403 1404 /* Add the end marker. */ 1405 SVN_ERR(svn_spillbuf__reader_write(b->reader, "-", 1, pool)); 1406 1407 /* Read the first pathinfo from the report and verify that it is a top-level 1408 set_path entry. */ 1409 SVN_ERR(read_path_info(&info, b->reader, pool)); 1410 if (!info || strcmp(info->path, b->s_operand) != 0 1411 || info->link_path || !SVN_IS_VALID_REVNUM(info->rev)) 1412 return svn_error_create(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 1413 _("Invalid report for top level of working copy")); 1414 s_rev = info->rev; 1415 1416 /* Initialize the lookahead pathinfo. */ 1417 subpool = svn_pool_create(pool); 1418 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 1419 1420 if (b->lookahead && strcmp(b->lookahead->path, b->s_operand) == 0) 1421 { 1422 /* If the operand of the wc operation is switched or deleted, 1423 then info above is just a place-holder, and the only thing we 1424 have to do is pass the revision it contains to open_root. 1425 The next pathinfo actually describes the target. */ 1426 if (!*b->s_operand) 1427 return svn_error_create(SVN_ERR_REPOS_BAD_REVISION_REPORT, NULL, 1428 _("Two top-level reports with no target")); 1429 /* If the client issued a set-path followed by a delete-path, we need 1430 to respect the depth set by the initial set-path. */ 1431 if (! SVN_IS_VALID_REVNUM(b->lookahead->rev)) 1432 { 1433 b->lookahead->depth = info->depth; 1434 } 1435 info = b->lookahead; 1436 SVN_ERR(read_path_info(&b->lookahead, b->reader, subpool)); 1437 } 1438 1439 /* Open the target root and initialize the source root cache. */ 1440 SVN_ERR(svn_fs_revision_root(&b->t_root, b->repos->fs, b->t_rev, pool)); 1441 for (i = 0; i < NUM_CACHED_SOURCE_ROOTS; i++) 1442 b->s_roots[i] = NULL; 1443 1444 { 1445 svn_error_t *err = svn_error_trace(drive(b, s_rev, info, pool)); 1446 1447 if (err == SVN_NO_ERROR) 1448 return svn_error_trace(b->editor->close_edit(b->edit_baton, pool)); 1449 1450 return svn_error_trace( 1451 svn_error_compose_create(err, 1452 b->editor->abort_edit(b->edit_baton, 1453 pool))); 1454 } 1455} 1456 1457/* --- COLLECTING THE REPORT INFORMATION --- */ 1458 1459/* Record a report operation into the spill buffer. Return an error 1460 if DEPTH is svn_depth_unknown. */ 1461static svn_error_t * 1462write_path_info(report_baton_t *b, const char *path, const char *lpath, 1463 svn_revnum_t rev, svn_depth_t depth, 1464 svn_boolean_t start_empty, 1465 const char *lock_token, apr_pool_t *pool) 1466{ 1467 const char *lrep, *rrep, *drep, *ltrep, *rep; 1468 1469 /* Munge the path to be anchor-relative, so that we can use edit paths 1470 as report paths. */ 1471 path = svn_relpath_join(b->s_operand, path, pool); 1472 1473 lrep = lpath ? apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s", 1474 strlen(lpath), lpath) : "-"; 1475 rrep = (SVN_IS_VALID_REVNUM(rev)) ? 1476 apr_psprintf(pool, "+%ld:", rev) : "-"; 1477 1478 if (depth == svn_depth_exclude) 1479 drep = "+X"; 1480 else if (depth == svn_depth_empty) 1481 drep = "+E"; 1482 else if (depth == svn_depth_files) 1483 drep = "+F"; 1484 else if (depth == svn_depth_immediates) 1485 drep = "+M"; 1486 else if (depth == svn_depth_infinity) 1487 drep = "-"; 1488 else 1489 return svn_error_createf(SVN_ERR_REPOS_BAD_ARGS, NULL, 1490 _("Unsupported report depth '%s'"), 1491 svn_depth_to_word(depth)); 1492 1493 ltrep = lock_token ? apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s", 1494 strlen(lock_token), lock_token) : "-"; 1495 rep = apr_psprintf(pool, "+%" APR_SIZE_T_FMT ":%s%s%s%s%c%s", 1496 strlen(path), path, lrep, rrep, drep, 1497 start_empty ? '+' : '-', ltrep); 1498 return svn_error_trace( 1499 svn_spillbuf__reader_write(b->reader, rep, strlen(rep), pool)); 1500} 1501 1502svn_error_t * 1503svn_repos_set_path3(void *baton, const char *path, svn_revnum_t rev, 1504 svn_depth_t depth, svn_boolean_t start_empty, 1505 const char *lock_token, apr_pool_t *pool) 1506{ 1507 return svn_error_trace( 1508 write_path_info(baton, path, NULL, rev, depth, start_empty, 1509 lock_token, pool)); 1510} 1511 1512svn_error_t * 1513svn_repos_link_path3(void *baton, const char *path, const char *link_path, 1514 svn_revnum_t rev, svn_depth_t depth, 1515 svn_boolean_t start_empty, 1516 const char *lock_token, apr_pool_t *pool) 1517{ 1518 if (depth == svn_depth_exclude) 1519 return svn_error_create(SVN_ERR_REPOS_BAD_ARGS, NULL, 1520 _("Depth 'exclude' not supported for link")); 1521 1522 return svn_error_trace( 1523 write_path_info(baton, path, link_path, rev, depth, 1524 start_empty, lock_token, pool)); 1525} 1526 1527svn_error_t * 1528svn_repos_delete_path(void *baton, const char *path, apr_pool_t *pool) 1529{ 1530 /* We pass svn_depth_infinity because deletion of a path always 1531 deletes everything underneath it. */ 1532 return svn_error_trace( 1533 write_path_info(baton, path, NULL, SVN_INVALID_REVNUM, 1534 svn_depth_infinity, FALSE, NULL, pool)); 1535} 1536 1537svn_error_t * 1538svn_repos_finish_report(void *baton, apr_pool_t *pool) 1539{ 1540 report_baton_t *b = baton; 1541 1542 return svn_error_trace(finish_report(b, pool)); 1543} 1544 1545svn_error_t * 1546svn_repos_abort_report(void *baton, apr_pool_t *pool) 1547{ 1548 return SVN_NO_ERROR; 1549} 1550 1551/* --- BEGINNING THE REPORT --- */ 1552 1553 1554svn_error_t * 1555svn_repos_begin_report3(void **report_baton, 1556 svn_revnum_t revnum, 1557 svn_repos_t *repos, 1558 const char *fs_base, 1559 const char *s_operand, 1560 const char *switch_path, 1561 svn_boolean_t text_deltas, 1562 svn_depth_t depth, 1563 svn_boolean_t ignore_ancestry, 1564 svn_boolean_t send_copyfrom_args, 1565 const svn_delta_editor_t *editor, 1566 void *edit_baton, 1567 svn_repos_authz_func_t authz_read_func, 1568 void *authz_read_baton, 1569 apr_size_t zero_copy_limit, 1570 apr_pool_t *pool) 1571{ 1572 report_baton_t *b; 1573 const char *uuid; 1574 1575 if (depth == svn_depth_exclude) 1576 return svn_error_create(SVN_ERR_REPOS_BAD_ARGS, NULL, 1577 _("Request depth 'exclude' not supported")); 1578 1579 SVN_ERR(svn_fs_get_uuid(repos->fs, &uuid, pool)); 1580 1581 /* Build a reporter baton. Copy strings in case the caller doesn't 1582 keep track of them. */ 1583 b = apr_palloc(pool, sizeof(*b)); 1584 b->repos = repos; 1585 b->fs_base = svn_fspath__canonicalize(fs_base, pool); 1586 b->s_operand = apr_pstrdup(pool, s_operand); 1587 b->t_rev = revnum; 1588 b->t_path = switch_path ? svn_fspath__canonicalize(switch_path, pool) 1589 : svn_fspath__join(b->fs_base, s_operand, pool); 1590 b->text_deltas = text_deltas; 1591 b->zero_copy_limit = zero_copy_limit; 1592 b->requested_depth = depth; 1593 b->ignore_ancestry = ignore_ancestry; 1594 b->send_copyfrom_args = send_copyfrom_args; 1595 b->is_switch = (switch_path != NULL); 1596 b->editor = editor; 1597 b->edit_baton = edit_baton; 1598 b->authz_read_func = authz_read_func; 1599 b->authz_read_baton = authz_read_baton; 1600 b->revision_infos = apr_hash_make(pool); 1601 b->pool = pool; 1602 b->reader = svn_spillbuf__reader_create(1000 /* blocksize */, 1603 1000000 /* maxsize */, 1604 pool); 1605 b->repos_uuid = svn_string_create(uuid, pool); 1606 1607 /* Hand reporter back to client. */ 1608 *report_baton = b; 1609 return SVN_NO_ERROR; 1610} 1611