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zed: bump zfs_zevent_len_max if we miss any events

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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #11834
This commit is contained in:
наб 2021-04-02 17:14:31 +02:00 committed by Brian Behlendorf
parent c52612ba03
commit 1a05182ba0
1 changed files with 41 additions and 8 deletions
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49
cmd/zed/zed_event.c
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@ -100,6 +100,45 @@ zed_event_fini(struct zed_conf *zcp)
zed_exec_fini();
}
static void
_bump_event_queue_length(void)
{
int zzlm = -1, wr;
char qlen_buf[12] = {0}; /* parameter is int => max "-2147483647\n" */
long int qlen;
zzlm = open("/sys/module/zfs/parameters/zfs_zevent_len_max", O_RDWR);
if (zzlm < 0)
goto done;
if (read(zzlm, qlen_buf, sizeof (qlen_buf)) < 0)
goto done;
qlen_buf[sizeof (qlen_buf) - 1] = '\0';
errno = 0;
qlen = strtol(qlen_buf, NULL, 10);
if (errno == ERANGE)
goto done;
if (qlen <= 0)
qlen = 512; /* default zfs_zevent_len_max value */
else
qlen *= 2;
if (qlen > INT_MAX)
qlen = INT_MAX;
wr = snprintf(qlen_buf, sizeof (qlen_buf), "%ld", qlen);
if (pwrite(zzlm, qlen_buf, wr, 0) < 0)
goto done;
zed_log_msg(LOG_WARNING, "Bumping queue length to %ld", qlen);
done:
if (zzlm > -1)
(void) close(zzlm);
}
/*
* Seek to the event specified by [saved_eid] and [saved_etime].
* This protects against processing a given event more than once.
@ -138,10 +177,7 @@ zed_event_seek(struct zed_conf *zcp, uint64_t saved_eid, int64_t saved_etime[])
if (n_dropped > 0) {
zed_log_msg(LOG_WARNING, "Missed %d events", n_dropped);
/*
* FIXME: Increase max size of event nvlist in
* /sys/module/zfs/parameters/zfs_zevent_len_max ?
*/
_bump_event_queue_length();
}
if (nvlist_lookup_uint64(nvl, "eid", &eid) != 0) {
zed_log_msg(LOG_WARNING, "Failed to lookup zevent eid");
@ -914,10 +950,7 @@ zed_event_service(struct zed_conf *zcp)
if (n_dropped > 0) {
zed_log_msg(LOG_WARNING, "Missed %d events", n_dropped);
/*
* FIXME: Increase max size of event nvlist in
* /sys/module/zfs/parameters/zfs_zevent_len_max ?
*/
_bump_event_queue_length();
}
if (nvlist_lookup_uint64(nvl, "eid", &eid) != 0) {
zed_log_msg(LOG_WARNING, "Failed to lookup zevent eid");