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Posted to commits@subversion.apache.org by st...@apache.org on 2015/01/29 11:42:16 UTC
svn commit: r1655579 - in /subversion/branches/1.7.x-issue4554: ./
subversion/libsvn_fs_fs/fs_fs.c subversion/libsvn_fs_fs/structure
subversion/tests/libsvn_fs_fs/fs-pack-test.c
Author: stefan2
Date: Thu Jan 29 10:42:16 2015
New Revision: 1655579
URL: http://svn.apache.org/r1655579
Log:
Merge r1654932, r1654933, r1654934 and r1654937 from /trunk and resolve
the text and file conflicts just like for 1.8.x. Adapt to old APIs.
Modified:
subversion/branches/1.7.x-issue4554/ (props changed)
subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/fs_fs.c
subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/structure
subversion/branches/1.7.x-issue4554/subversion/tests/libsvn_fs_fs/fs-pack-test.c
Propchange: subversion/branches/1.7.x-issue4554/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Jan 29 10:42:16 2015
@@ -151,4 +151,4 @@
/subversion/branches/tree-conflicts:868291-873154
/subversion/branches/tree-conflicts-notify:873926-874008
/subversion/branches/uris-as-urls:1060426-1064427
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+/subversion/trunk:1146013,1146121,1146219,1146222,1146274,1146492,1146555,1146606,1146620,1146684,1146762,1146781,1146832,1146834,1146870,1146899,1146904,1147293,1147299,1147309,1147882,1148071,1148083,1148094,1148131,1148374,1148424,1148566,1148588,1148652,1148662,1148699,1148853,1148877,1148882,1148936,1149103,1149105,1149135,1149141,1149160,1149228,1149240,1149343,1149371-1149372,1149377,1149398,1149401,1149539,1149572,1149627,1149675,1149701,1149713,1150242,1150254,1150260-1150261,1150266,1150302,1150327,1150344,1150368,1150372,1150441,1150506,1150812,1150853,1151036,1151177,1151610,1151854,1151906,1151911,1152129,1152140,1152189-1152190,1152267,1152282,1152286,1152726,1152809,1153138,1153141,1153416,1153540,1153566,1153799,1153807,1153968,1154009,1154023,1154115,1154119,1154121,1154144,1154155,1154159,1154165,1154215,1154225,1154273,1154278,1154379,1154382,1154461,1154717-1154718,1154733,1154908,1154982,1155015,1155044,1155124,1155131,1155160,1155313,1155334,1155391,1155404,115
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1178280,1178282,1178942,1179680,1179767,1179776,1180154,1181090,1181110,1181155,1181215,1181609,1181666,1182115,1182527,1182771,1182904,1182909,1183054,1183263,1183347,1185222,1185242,1185280,1185282,1185730,1185738,1185746,1185763,1185768,1185886,1185911,1185918,1186059,1186092,1186101,1186107,1186109,1186121,1186231,1186240,1186422,1186434,1186732,1186755,1186784,1186815,1186928,1186944,1186981,1186983,1187311,1187676,1187695,1188609,1188652,1188677,1188762,1188774,1189190,1189261,1189395,1189580,1189665,1190463,1195480,1197135,1197998,1199876,1199950,1200277,1200837,1200896,1201002,1201072,1201419,1201824,1202132,1202135,1202187,1202333,1202630,1202807,1203546,1203651,1203653,1203977,1204167,1204478,1204610,1204673,1205188,1205193,1205209,1205726,1205839,1205848,1205968,1206523,1206533,1206576,1206718-1206719,1206724,1206741,1206748,1207555,1207656,1207663,1207808,1207823,1207858,1207949,1208840,1209631,1209654,1210147,1210195,1210913,1211048,1211483,1211859,1211885,1212476,12124
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Modified: subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/fs_fs.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/fs_fs.c?rev=1655579&r1=1655578&r2=1655579&view=diff
==============================================================================
--- subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/fs_fs.c (original)
+++ subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/fs_fs.c Thu Jan 29 10:42:16 2015
@@ -41,6 +41,7 @@
#include "svn_fs.h"
#include "svn_dirent_uri.h"
#include "svn_path.h"
+#include "svn_checksum.h"
#include "svn_hash.h"
#include "svn_props.h"
#include "svn_sorts.h"
@@ -4137,10 +4138,42 @@ svn_fs_fs__file_length(svn_filesize_t *l
node_revision_t *noderev,
apr_pool_t *pool)
{
- if (noderev->data_rep)
- *length = noderev->data_rep->expanded_size;
+ representation_t *data_rep = noderev->data_rep;
+ if (!data_rep)
+ {
+ /* Treat "no representation" as "empty file". */
+ *length = 0;
+ }
+ else if (data_rep->expanded_size)
+ {
+ /* Standard case: a non-empty file. */
+ *length = data_rep->expanded_size;
+ }
else
- *length = 0;
+ {
+ /* Work around a FSFS format quirk (see issue #4554).
+ A plain representation may specify its EXPANDED LENGTH as "0"
+ in which case, the SIZE value is what we want.
+
+ Because EXPANDED_LENGTH will also be 0 for empty files, while
+ SIZE is non-null, we need to check wether the content is
+ actually empty. We simply compare with the MD5 checksum of
+ empty content (sha-1 is not always available).
+ */
+ if (svn_checksum_match(data_rep->md5_checksum,
+ svn_checksum_empty_checksum(svn_checksum_md5,
+ pool)))
+ {
+ /* Contents is empty. */
+ *length = 0;
+ }
+ else
+ {
+ /* Contents is not empty, i.e. EXPANDED_LENGTH cannot be the
+ actual file length. */
+ *length = data_rep->size;
+ }
+ }
return SVN_NO_ERROR;
}
@@ -5702,7 +5735,12 @@ rep_write_contents_close(void *baton)
else
old_rep = NULL;
- if (old_rep)
+ /* We don't want 0-length PLAIN representations to replace non-0-length
+ ones (see issue #4554). Also, this doubles as a simple guard against
+ general rep-cache induced corruption. */
+ if (old_rep
+ && (old_rep->expanded_size != rep->expanded_size)
+ && (old_rep->size != rep->size))
{
/* We need to erase from the protorev the data we just wrote. */
SVN_ERR(svn_io_file_trunc(b->file, b->rep_offset, b->pool));
Modified: subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/structure
URL: http://svn.apache.org/viewvc/subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/structure?rev=1655579&r1=1655578&r2=1655579&view=diff
==============================================================================
--- subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/structure (original)
+++ subversion/branches/1.7.x-issue4554/subversion/libsvn_fs_fs/structure Thu Jan 29 10:42:16 2015
@@ -379,7 +379,7 @@ defined:
props "<rev> <offset> <length> <size> <digest>" for props rep
<rev> and <offset> give location of rep
<length> gives length of rep, sans header and trailer
- <size> gives size of expanded rep
+ <size> gives size of expanded rep (*)
<digest> gives hex MD5 digest of expanded rep
### in formats >=4, also present:
<sha1-digest> gives hex SHA1 digest of expanded rep
@@ -391,6 +391,15 @@ defined:
which have svn:mergeinfo.
minfo-here Exists if this node itself has svn:mergeinfo.
+(*) Earlier versions of this document would state that <size> may be 0
+ if the actual value matches <length>. This is only true for property
+ and directory representations and should be avoided in general. File
+ representations may not be handled correctly by SVN before 1.7.20,
+ if they have 0 <size> fields for non-empty contents. Releases 1.8.0
+ through 1.8.11 may have falsely created instances of that (see issue
+ #4554). Finally, 0 <size> fields for non-empty reps are NEVER legal
+ for DELTA representations.
+
The predecessor of a node-rev crosses both soft and true copies;
together with the count field, it allows efficient determination of
the base for skip-deltas. The first node-rev of a node contains no
Modified: subversion/branches/1.7.x-issue4554/subversion/tests/libsvn_fs_fs/fs-pack-test.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.7.x-issue4554/subversion/tests/libsvn_fs_fs/fs-pack-test.c?rev=1655579&r1=1655578&r2=1655579&view=diff
==============================================================================
--- subversion/branches/1.7.x-issue4554/subversion/tests/libsvn_fs_fs/fs-pack-test.c (original)
+++ subversion/branches/1.7.x-issue4554/subversion/tests/libsvn_fs_fs/fs-pack-test.c Thu Jan 29 10:42:16 2015
@@ -25,7 +25,9 @@
#include <apr_pools.h>
#include "../svn_test.h"
+#include "../../libsvn_fs/fs-loader.h"
#include "../../libsvn_fs_fs/fs.h"
+#include "../../libsvn_fs_fs/fs_fs.h"
#include "svn_pools.h"
#include "svn_props.h"
@@ -477,6 +479,113 @@ recover_fully_packed(const svn_test_opts
#undef SHARD_SIZE
/* ------------------------------------------------------------------------ */
+
+#define REPO_NAME "test-repo-plain_0_length"
+
+static char *
+stringbuf_find(svn_stringbuf_t *rev_contents,
+ const char *substring)
+{
+ apr_size_t i;
+ apr_size_t len = strlen(substring);
+
+ for (i = 0; i < rev_contents->len - len + 1; ++i)
+ if (!memcmp(rev_contents->data + i, substring, len))
+ return rev_contents->data + i;
+
+ return NULL;
+}
+
+
+static svn_stringbuf_t *
+get_line(svn_stringbuf_t *rev_contents,
+ const char *prefix,
+ apr_pool_t *pool)
+{
+ char *end, *start = stringbuf_find(rev_contents, prefix);
+ if (start == NULL)
+ return svn_stringbuf_create("", pool);
+
+ end = strchr(start, '\n');
+ if (end == NULL)
+ return svn_stringbuf_create("", pool);
+
+ return svn_stringbuf_ncreate(start, end - start, pool);
+}
+
+static svn_error_t *
+plain_0_length(const svn_test_opts_t *opts,
+ apr_pool_t *pool)
+{
+ svn_fs_t *fs;
+ fs_fs_data_t *ffd;
+ svn_fs_txn_t *txn;
+ svn_fs_root_t *root;
+ svn_revnum_t rev;
+ const char *rev_path;
+ svn_stringbuf_t *rev_contents, *props_line;
+ char *text;
+ svn_filesize_t file_length;
+ apr_file_t *file;
+
+ if (strcmp(opts->fs_type, "fsfs") != 0)
+ return svn_error_create(SVN_ERR_TEST_SKIPPED, NULL, NULL);
+
+ /* Create a repo that does not share reps on its own - makes it easier to
+ do that later by hand. */
+ SVN_ERR(svn_test__create_fs(&fs, REPO_NAME, opts, pool));
+ ffd = fs->fsap_data;
+ ffd->rep_sharing_allowed = FALSE;
+
+ /* Create one file node with matching contents and property reps. */
+ SVN_ERR(svn_fs_begin_txn(&txn, fs, 0, pool));
+ SVN_ERR(svn_fs_txn_root(&root, txn, pool));
+ SVN_ERR(svn_fs_make_file(root, "foo", pool));
+ SVN_ERR(svn_test__set_file_contents(root, "foo", "END\n", pool));
+ SVN_ERR(svn_fs_change_node_prop(root, "foo", "x", NULL, pool));
+ SVN_ERR(svn_fs_commit_txn(NULL, &rev, txn, pool));
+
+ /* Redirect text rep to props rep. */
+ SVN_ERR(svn_fs_fs__path_rev_absolute(&rev_path, fs, rev, pool));
+ SVN_ERR(svn_stringbuf_from_file2(&rev_contents, rev_path, pool));
+
+ props_line = get_line(rev_contents, "props: ", pool);
+ text = stringbuf_find(rev_contents, "text: ");
+
+ if (text)
+ {
+ /* Explicitly set the last number before the MD5 to 0 */
+ strstr(props_line->data, " 2d29")[-1] = '0';
+
+ /* Add a padding space - in case we shorten the number in TEXT */
+ svn_stringbuf_appendbyte(props_line, ' ');
+
+ /* Make text point to the PLAIN data rep with no expanded size info. */
+ memcpy(text + 6, props_line->data + 7, props_line->len - 7);
+ }
+
+ SVN_ERR(svn_io_set_file_read_write(rev_path, FALSE, pool));
+ SVN_ERR(svn_io_file_open(&file, rev_path, APR_WRITE | APR_TRUNCATE,
+ APR_OS_DEFAULT, pool));
+ SVN_ERR(svn_io_file_write_full(file, rev_contents->data,
+ rev_contents->len, NULL, pool));
+ SVN_ERR(svn_io_file_close(file, pool));
+
+ /* Create a new FS instance. */
+ SVN_ERR(svn_fs_open(&fs, REPO_NAME, NULL, pool));
+
+ /* Now, check that we get the correct file length. */
+ SVN_ERR(svn_fs_revision_root(&root, fs, rev, pool));
+ SVN_ERR(svn_fs_file_length(&file_length, root, "foo", pool));
+
+ SVN_TEST_ASSERT(file_length == 4);
+
+ return SVN_NO_ERROR;
+}
+
+#undef REPO_NAME
+
+/* ------------------------------------------------------------------------ */
/* The test table. */
@@ -495,5 +604,7 @@ struct svn_test_descriptor_t test_funcs[
"get/set revprop while packing FSFS filesystem"),
SVN_TEST_OPTS_PASS(recover_fully_packed,
"recover a fully packed filesystem"),
+ SVN_TEST_OPTS_PASS(plain_0_length,
+ "file with 0 expanded-length, issue #4554"),
SVN_TEST_NULL
};