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/*-
* Public Domain 2014-2016 MongoDB, Inc.
* Public Domain 2008-2014 WiredTiger, Inc.
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "format.h"
/*
* salvage --
* A single salvage.
*/
static void
salvage(void)
{
WT_CONNECTION *conn;
WT_SESSION *session;
int ret;
conn = g.wts_conn;
track("salvage", 0ULL, NULL);
testutil_check(conn->open_session(conn, NULL, NULL, &session));
if ((ret = session->salvage(session, g.uri, "force=true")) != 0)
testutil_die(ret, "session.salvage: %s", g.uri);
testutil_check(session->close(session, NULL));
}
/*
* corrupt --
* Corrupt the file in a random way.
*/
static int
corrupt(void)
{
FILE *fp;
struct stat sb;
size_t len, nw;
wt_off_t offset;
int fd, ret;
char buf[8 * 1024], copycmd[2 * 1024];
/*
* If it's a single Btree file (not LSM), open the file, and corrupt
* roughly 2% of the file at a random spot, including the beginning
* of the file and overlapping the end.
*
* It's a little tricky: if the data source is a file, we're looking
* for "wt", if the data source is a table, we're looking for "wt.wt".
*/
(void)snprintf(buf, sizeof(buf), "%s/%s", g.home, WT_NAME);
if ((fd = open(buf, O_RDWR)) != -1) {
#ifdef _WIN32
(void)snprintf(copycmd, sizeof(copycmd),
"copy %s\\%s %s\\slvg.copy\\%s.corrupted",
g.home, WT_NAME, g.home, WT_NAME);
#else
(void)snprintf(copycmd, sizeof(copycmd),
"cp %s/%s %s/slvg.copy/%s.corrupted",
g.home, WT_NAME, g.home, WT_NAME);
#endif
goto found;
}
(void)snprintf(buf, sizeof(buf), "%s/%s.wt", g.home, WT_NAME);
if ((fd = open(buf, O_RDWR)) != -1) {
#ifdef _WIN32
(void)snprintf(copycmd, sizeof(copycmd),
"copy %s\\%s.wt %s\\slvg.copy\\%s.wt.corrupted",
g.home, WT_NAME, g.home, WT_NAME);
#else
(void)snprintf(copycmd, sizeof(copycmd),
"cp %s/%s.wt %s/slvg.copy/%s.wt.corrupted",
g.home, WT_NAME, g.home, WT_NAME);
#endif
goto found;
}
return (0);
found: if (fstat(fd, &sb) == -1)
testutil_die(errno, "salvage-corrupt: fstat");
offset = mmrand(NULL, 0, (u_int)sb.st_size);
len = (size_t)(20 + (sb.st_size / 100) * 2);
(void)snprintf(buf, sizeof(buf), "%s/slvg.corrupt", g.home);
if ((fp = fopen(buf, "w")) == NULL)
testutil_die(errno, "salvage-corrupt: open: %s", buf);
(void)fprintf(fp,
"salvage-corrupt: offset %" PRIuMAX ", length " SIZET_FMT "\n",
(uintmax_t)offset, len);
fclose_and_clear(&fp);
if (lseek(fd, offset, SEEK_SET) == -1)
testutil_die(errno, "salvage-corrupt: lseek");
memset(buf, 'z', sizeof(buf));
for (; len > 0; len -= nw) {
nw = (size_t)(len > sizeof(buf) ? sizeof(buf) : len);
if (write(fd, buf, nw) == -1)
testutil_die(errno, "salvage-corrupt: write");
}
if (close(fd) == -1)
testutil_die(errno, "salvage-corrupt: close");
/*
* Save a copy of the corrupted file so we can replay the salvage step
* as necessary.
*/
if ((ret = system(copycmd)) != 0)
testutil_die(ret, "salvage corrupt copy step failed");
return (1);
}
/*
* wts_salvage --
* Salvage testing.
*/
void
wts_salvage(void)
{
int ret;
/* Some data-sources don't support salvage. */
if (DATASOURCE("helium") || DATASOURCE("kvsbdb"))
return;
if (g.c_salvage == 0)
return;
/*
* Save a copy of the interesting files so we can replay the salvage
* step as necessary.
*/
if ((ret = system(g.home_salvage_copy)) != 0)
testutil_die(ret, "salvage copy step failed");
/* Salvage, then verify. */
wts_open(g.home, 1, &g.wts_conn);
salvage();
wts_verify("post-salvage verify");
wts_close();
/*
* If no records were deleted, dump and compare against Berkeley DB.
* (The problem with deleting records is salvage restores deleted
* records if a page splits leaving a deleted record on one side of
* the split, so we cannot depend on correctness in that case.)
*/
if (g.c_delete_pct == 0)
wts_dump("salvage", SINGLETHREADED);
/* Corrupt the file randomly, salvage, then verify. */
if (corrupt()) {
wts_open(g.home, 1, &g.wts_conn);
salvage();
wts_verify("post-corrupt-salvage verify");
wts_close();
}
}
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