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Maintain and report outgoing transfer statistics

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Transfer statistics are currently only reported for incoming transfers,
even though they are equally useful for outgoing transfers.  Define a
separate structure for keeping track of the number of messages, records,
and bytes sent during each outgoing transfer, along with the time each
outgoing transfer took.  Repurpose the 'nmsg' field of the xfrout_ctx_t
structure for tracking the number of messages actually sent, ensuring it
is only increased after isc_socket_send() indicates success.  Report the
statistics gathered when an outgoing transfer completes.
This commit is contained in:
Michał Kępień 2019-01-31 15:43:58 +01:00 committed by Evan Hunt
parent c20d81fd06
commit 7f52b87227
1 changed files with 53 additions and 8 deletions
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61
lib/ns/xfrout.c
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@ -645,11 +645,22 @@ static rrstream_methods_t compound_rrstream_methods = {
};
/**************************************************************************/
/*
/*%
* Structure holding outgoing transfer statistics
*/
struct xfr_stats {
uint64_t nmsg; /*%< Number of messages sent */
uint64_t nrecs; /*%< Number of records sent */
uint64_t nbytes; /*%< Number of bytes sent */
isc_time_t start; /*%< Start time of the transfer */
isc_time_t end; /*%< End time of the transfer */
};
/*%
* An 'xfrout_ctx_t' contains the state of an outgoing AXFR or IXFR
* in progress.
*/
typedef struct {
isc_mem_t *mctx;
ns_client_t *client;
@ -670,7 +681,6 @@ typedef struct {
isc_buffer_t txbuf; /* Transmit message buffer */
void *txmem;
unsigned int txmemlen;
unsigned int nmsg; /* Number of messages sent */
dns_tsigkey_t *tsigkey; /* Key used to create TSIG */
isc_buffer_t *lasttsig; /* the last TSIG */
bool verified_tsig; /* verified request MAC */
@ -678,6 +688,7 @@ typedef struct {
int sends; /* Send in progress */
bool shuttingdown;
const char *mnemonic; /* Style of transfer */
struct xfr_stats stats; /*%< Transfer statistics */
} xfrout_ctx_t;
static isc_result_t
@ -1186,7 +1197,6 @@ xfrout_ctx_create(isc_mem_t *mctx, ns_client_t *client, unsigned int id,
xfr->tsigkey = tsigkey;
xfr->lasttsig = lasttsig;
xfr->verified_tsig = verified_tsig;
xfr->nmsg = 0;
xfr->many_answers = many_answers;
xfr->sends = 0;
xfr->shuttingdown = false;
@ -1198,6 +1208,11 @@ xfrout_ctx_create(isc_mem_t *mctx, ns_client_t *client, unsigned int id,
xfr->stream = NULL;
xfr->quota = NULL;
xfr->stats.nmsg = 0;
xfr->stats.nrecs = 0;
xfr->stats.nbytes = 0;
isc_time_now(&xfr->stats.start);
/*
* Allocate a temporary buffer for the uncompressed response
* message data. The size should be no more than 65535 bytes
@ -1483,6 +1498,8 @@ sendstream(xfrout_ctx_t *xfr) {
dns_message_addname(msg, msgname, DNS_SECTION_ANSWER);
msgname = NULL;
xfr->stats.nrecs++;
result = xfr->stream->methods->next(xfr->stream);
if (result == ISC_R_NOMORE) {
xfr->end_of_stream = true;
@ -1537,8 +1554,6 @@ sendstream(xfrout_ctx_t *xfr) {
/* Advance lasttsig to be the last TSIG generated */
CHECK(dns_message_getquerytsig(msg, xfr->mctx, &xfr->lasttsig));
xfr->nmsg++;
failure:
if (msgname != NULL) {
if (msgrds != NULL) {
@ -1621,10 +1636,20 @@ xfrout_senddone(isc_task_t *task, isc_event_t *event) {
INSIST(event->ev_type == ISC_SOCKEVENT_SENDDONE);
isc_event_free(&event);
xfr->sends--;
INSIST(xfr->sends == 0);
/*
* Update transfer statistics if sending succeeded, accounting for the
* two-byte TCP length prefix included in the number of bytes sent.
*/
if (evresult == ISC_R_SUCCESS) {
xfr->stats.nmsg++;
xfr->stats.nbytes += sev->region.length - 2;
}
isc_event_free(&event);
(void)isc_timer_touch(xfr->client->timer);
if (xfr->shuttingdown == true) {
xfrout_maybe_destroy(xfr);
@ -1634,8 +1659,28 @@ xfrout_senddone(isc_task_t *task, isc_event_t *event) {
sendstream(xfr);
} else {
/* End of zone transfer stream. */
uint64_t msecs, persec;
inc_stats(xfr->client, xfr->zone, ns_statscounter_xfrdone);
xfrout_log(xfr, ISC_LOG_INFO, "%s ended", xfr->mnemonic);
isc_time_now(&xfr->stats.end);
msecs = isc_time_microdiff(&xfr->stats.end, &xfr->stats.start);
msecs /= 1000;
if (msecs == 0) {
msecs = 1;
}
persec = (xfr->stats.nbytes * 1000) / msecs;
xfrout_log(xfr, ISC_LOG_INFO,
"%s ended: "
"%" PRIu64 " messages, %" PRIu64 " records, "
"%" PRIu64 " bytes, "
"%u.%03u secs (%u bytes/sec)",
xfr->mnemonic,
xfr->stats.nmsg, xfr->stats.nrecs,
xfr->stats.nbytes,
(unsigned int) (msecs / 1000),
(unsigned int) (msecs % 1000),
(unsigned int) persec);
ns_client_next(xfr->client, ISC_R_SUCCESS);
xfrout_ctx_destroy(&xfr);
}