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Merge branch '2732-pause-the-dbiterator-in-dumptostream' into 'main'

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Pause the dbiterator when dumping the zone to the disk

Closes #2732

See merge request isc-projects/bind9!5150
This commit is contained in:
Ondřej Surý
2021-06-04 09:05:52 +00:00
parent 7fef01201d 7e59b8a4a1
commit be01f589d9
1 changed files with 19 additions and 26 deletions
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45
lib/dns/masterdump.c
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@@ -254,7 +254,6 @@ struct dns_dumpctx {
isc_mutex_t lock;
isc_refcount_t references;
atomic_bool canceled;
bool first;
bool do_date;
isc_stdtime_t now;
FILE *f;
@@ -1578,7 +1577,6 @@ dumpctx_create(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version,
dctx->done = NULL;
dctx->done_arg = NULL;
dctx->task = NULL;
dctx->first = true;
atomic_init(&dctx->canceled, false);
dctx->file = NULL;
dctx->tmpfile = NULL;
@@ -1737,7 +1735,6 @@ dumptostream(dns_dumpctx_t *dctx) {
char *bufmem;
dns_name_t *name;
dns_fixedname_t fixname;
isc_time_t start;
bufmem = isc_mem_get(dctx->mctx, initial_buffer_length);
@@ -1745,32 +1742,24 @@ dumptostream(dns_dumpctx_t *dctx) {
name = dns_fixedname_initname(&fixname);
if (dctx->first) {
CHECK(writeheader(dctx));
CHECK(writeheader(dctx));
/*
* Fast format is not currently written incrementally,
* so we make the call to dns_db_serialize() here.
* If the database is anything other than an rbtdb,
* this should result in not implemented
*/
if (dctx->format == dns_masterformat_map) {
result = dns_db_serialize(dctx->db, dctx->version,
dctx->f);
goto cleanup;
}
result = dns_dbiterator_first(dctx->dbiter);
if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE) {
goto cleanup;
}
dctx->first = false;
} else {
result = ISC_R_SUCCESS;
/*
* Fast format is not currently written incrementally,
* so we make the call to dns_db_serialize() here.
* If the database is anything other than an rbtdb,
* this should result in not implemented
*/
if (dctx->format == dns_masterformat_map) {
result = dns_db_serialize(dctx->db, dctx->version, dctx->f);
goto cleanup;
}
result = dns_dbiterator_first(dctx->dbiter);
if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE) {
goto cleanup;
}
isc_time_now(&start);
while (result == ISC_R_SUCCESS) {
dns_rdatasetiter_t *rdsiter = NULL;
dns_dbnode_t *node = NULL;
@@ -1790,6 +1779,10 @@ dumptostream(dns_dumpctx_t *dctx) {
}
dctx->tctx.neworigin = origin;
}
result = dns_dbiterator_pause(dctx->dbiter);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_db_allrdatasets(dctx->db, node, dctx->version,
dctx->now, &rdsiter);
if (result != ISC_R_SUCCESS) {