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ntdb: test arbitrary operations during ntdb_parse_record().

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In particular, this tests that we can store enough records to make the
database expand while we map the given record.  We use a global lock for
this, but it could happen in theory with another process.

It also tests the that we can recurse inside ntdb_parse_record().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2012-06-22 09:44:41 +09:30
parent 01ec4a72de
commit 4c51ee1116
2 changed files with 90 additions and 0 deletions
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89
lib/ntdb/test/api-94-expand-during-parse.c Normal file
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@ -0,0 +1,89 @@
/* We use direct access to hand to the parse function: what if db expands? */
#include "config.h"
#include "ntdb.h"
#include "tap-interface.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "logging.h"
#include "../private.h" /* To establish size, esp. for NTDB_INTERNAL dbs */
static struct ntdb_context *ntdb;
static off_t ntdb_size(void)
{
return ntdb->file->map_size;
}
struct parse_info {
unsigned int depth;
NTDB_DATA expected;
};
static enum NTDB_ERROR parse(NTDB_DATA key, NTDB_DATA data,
struct parse_info *pinfo)
{
off_t flen;
unsigned int i;
if (!ntdb_deq(data, pinfo->expected))
return NTDB_ERR_EINVAL;
flen = ntdb_size();
for (i = 0; ntdb_size() == flen; i++) {
NTDB_DATA add = ntdb_mkdata(&i, sizeof(i));
/* This is technically illegal parse(), which is why we
* grabbed allrecord lock.*/
ntdb_store(ntdb, add, add, NTDB_INSERT);
}
/* Access the record again. */
if (!ntdb_deq(data, pinfo->expected))
return NTDB_ERR_EINVAL;
/* Recurse! Woot! */
if (pinfo->depth != 0) {
enum NTDB_ERROR ecode;
pinfo->depth--;
ecode = ntdb_parse_record(ntdb, key, parse, pinfo);
if (ecode) {
return ecode;
}
}
/* Access the record one more time. */
if (!ntdb_deq(data, pinfo->expected))
return NTDB_ERR_EINVAL;
return NTDB_SUCCESS;
}
int main(int argc, char *argv[])
{
unsigned int i;
int flags[] = { NTDB_INTERNAL, NTDB_DEFAULT, NTDB_NOMMAP,
NTDB_INTERNAL|NTDB_CONVERT, NTDB_CONVERT,
NTDB_NOMMAP|NTDB_CONVERT };
struct parse_info pinfo;
NTDB_DATA key = ntdb_mkdata("hello", 5), data = ntdb_mkdata("world", 5);
plan_tests(sizeof(flags) / sizeof(flags[0]) * 3 + 1);
for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
ntdb = ntdb_open("api-94-expand-during-parse.ntdb",
flags[i]|MAYBE_NOSYNC,
O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
ok1(ntdb_store(ntdb, key, data, NTDB_INSERT) == NTDB_SUCCESS);
ok1(ntdb_lockall(ntdb) == NTDB_SUCCESS);
pinfo.expected = data;
pinfo.depth = 3;
ok1(ntdb_parse_record(ntdb, key, parse, &pinfo) == NTDB_SUCCESS);
ntdb_unlockall(ntdb);
ntdb_close(ntdb);
}
ok1(tap_log_messages == 0);
return exit_status();
}

1
lib/ntdb/wscript
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@ -79,6 +79,7 @@ def configure(conf):
'test/api-91-get-stats.c',
'test/api-92-get-set-readonly.c',
'test/api-93-repack.c',
'test/api-94-expand-during-parse.c',
'test/api-95-read-only-during-parse.c',
'test/api-add-remove-flags.c',
'test/api-check-callback.c',