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mdadm/SOURCES/0088-Mdmonitor-Pass-events-...

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From 50232a6ec4a5c46c608181d72d0c633831a03134 Mon Sep 17 00:00:00 2001
From: Mateusz Grzonka <mateusz.grzonka@intel.com>
Date: Thu, 2 Feb 2023 12:27:00 +0100
Subject: [PATCH 088/125] Mdmonitor: Pass events to alert() using enums instead
of strings
Add events enum, and mapping_t struct, that maps them to strings, so
that enums are passed around instead of strings.
Signed-off-by: Mateusz Grzonka <mateusz.grzonka@intel.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
---
Monitor.c | 136 +++++++++++++++++++++++++++++++++---------------------
1 file changed, 83 insertions(+), 53 deletions(-)
diff --git a/Monitor.c b/Monitor.c
index 9ef4dab8..029e9efd 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -32,6 +32,8 @@
#include <libudev.h>
#endif
+#define EVENT_NAME_MAX 32
+
struct state {
char devname[MD_NAME_MAX + sizeof("/dev/md/")]; /* length of "/dev/md/" + device name + terminating byte*/
char devnm[MD_NAME_MAX]; /* to sync with mdstat info */
@@ -65,10 +67,43 @@ struct alert_info {
int dosyslog;
int test;
} info;
+
+enum event {
+ EVENT_SPARE_ACTIVE = 0,
+ EVENT_NEW_ARRAY,
+ EVENT_MOVE_SPARE,
+ EVENT_TEST_MESSAGE,
+ EVENT_REBUILD_STARTED,
+ EVENT_REBUILD,
+ EVENT_REBUILD_FINISHED,
+ EVENT_SPARES_MISSING,
+ EVENT_DEVICE_DISAPPEARED,
+ EVENT_FAIL,
+ EVENT_FAIL_SPARE,
+ EVENT_DEGRADED_ARRAY,
+ EVENT_UNKNOWN
+};
+
+mapping_t events_map[] = {
+ {"SpareActive", EVENT_SPARE_ACTIVE},
+ {"NewArray", EVENT_NEW_ARRAY},
+ {"MoveSpare", EVENT_MOVE_SPARE},
+ {"TestMessage", EVENT_TEST_MESSAGE},
+ {"RebuildStarted", EVENT_REBUILD_STARTED},
+ {"Rebuild", EVENT_REBUILD},
+ {"RebuildFinished", EVENT_REBUILD_FINISHED},
+ {"SparesMissing", EVENT_SPARES_MISSING},
+ {"DeviceDisappeared", EVENT_DEVICE_DISAPPEARED},
+ {"Fail", EVENT_FAIL},
+ {"FailSpare", EVENT_FAIL_SPARE},
+ {"DegradedArray", EVENT_DEGRADED_ARRAY},
+ {NULL, EVENT_UNKNOWN}
+};
+
static int make_daemon(char *pidfile);
static int check_one_sharer(int scan);
static void write_autorebuild_pid(void);
-static void alert(const char *event, const char *dev, const char *disc);
+static void alert(const enum event event_enum, const unsigned int progress, const char *dev, const char *disc);
static int check_array(struct state *st, struct mdstat_ent *mdstat, int increments, char *prefer);
static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist);
static void try_spare_migration(struct state *statelist);
@@ -415,7 +450,7 @@ static void write_autorebuild_pid()
}
}
-static void execute_alert_cmd(const char *event, const char *dev, const char *disc)
+static void execute_alert_cmd(const char *event_name, const char *dev, const char *disc)
{
int pid = fork();
@@ -427,12 +462,12 @@ static void execute_alert_cmd(const char *event, const char *dev, const char *di
pr_err("Cannot fork to execute alert command");
break;
case 0:
- execl(info.alert_cmd, info.alert_cmd, event, dev, disc, NULL);
+ execl(info.alert_cmd, info.alert_cmd, event_name, dev, disc, NULL);
exit(2);
}
}
-static void send_event_email(const char *event, const char *dev, const char *disc)
+static void send_event_email(const char *event_name, const char *dev, const char *disc)
{
FILE *mp, *mdstat;
char buf[BUFSIZ];
@@ -450,9 +485,9 @@ static void send_event_email(const char *event, const char *dev, const char *dis
else
fprintf(mp, "From: %s monitoring <root>\n", Name);
fprintf(mp, "To: %s\n", info.mailaddr);
- fprintf(mp, "Subject: %s event on %s:%s\n\n", event, dev, info.hostname);
+ fprintf(mp, "Subject: %s event on %s:%s\n\n", event_name, dev, info.hostname);
fprintf(mp, "This is an automatically generated mail message. \n");
- fprintf(mp, "A %s event had been detected on md device %s.\n\n", event, dev);
+ fprintf(mp, "A %s event had been detected on md device %s.\n\n", event_name, dev);
if (disc && disc[0] != ' ')
fprintf(mp,
@@ -474,20 +509,20 @@ static void send_event_email(const char *event, const char *dev, const char *dis
pclose(mp);
}
-static void log_event_to_syslog(const char *event, const char *dev, const char *disc)
+static void log_event_to_syslog(const enum event event_enum, const char *event_name, const char *dev, const char *disc)
{
int priority;
/* Log at a different severity depending on the event.
*
* These are the critical events: */
- if (strncmp(event, "Fail", 4) == 0 ||
- strncmp(event, "Degrade", 7) == 0 ||
- strncmp(event, "DeviceDisappeared", 17) == 0)
+ if (event_enum == EVENT_FAIL ||
+ event_enum == EVENT_DEGRADED_ARRAY ||
+ event_enum == EVENT_DEVICE_DISAPPEARED)
priority = LOG_CRIT;
/* Good to know about, but are not failures: */
- else if (strncmp(event, "Rebuild", 7) == 0 ||
- strncmp(event, "MoveSpare", 9) == 0 ||
- strncmp(event, "Spares", 6) != 0)
+ else if (event_enum == EVENT_REBUILD ||
+ event_enum == EVENT_MOVE_SPARE ||
+ event_enum == EVENT_SPARES_MISSING)
priority = LOG_WARNING;
/* Everything else: */
else
@@ -495,33 +530,37 @@ static void log_event_to_syslog(const char *event, const char *dev, const char *
if (disc && disc[0] != ' ')
syslog(priority,
- "%s event detected on md device %s, component device %s", event, dev, disc);
+ "%s event detected on md device %s, component device %s",
+ event_name, dev, disc);
else if (disc)
- syslog(priority, "%s event detected on md device %s: %s", event, dev, disc);
+ syslog(priority, "%s event detected on md device %s: %s", event_name, dev, disc);
else
- syslog(priority, "%s event detected on md device %s", event, dev);
+ syslog(priority, "%s event detected on md device %s", event_name, dev);
}
-static void alert(const char *event, const char *dev, const char *disc)
+static void alert(const enum event event_enum, const unsigned int progress, const char *dev, const char *disc)
{
- if (!info.alert_cmd && !info.mailaddr && !info.dosyslog) {
- time_t now = time(0);
+ char event_name[EVENT_NAME_MAX];
- printf("%1.15s: %s on %s %s\n", ctime(&now) + 4,
- event, dev, disc?disc:"unknown device");
+ if (event_enum == EVENT_REBUILD) {
+ snprintf(event_name, sizeof(event_name), "%s%02d",
+ map_num_s(events_map, EVENT_REBUILD), progress);
+ } else {
+ snprintf(event_name, sizeof(event_name), "%s", map_num_s(events_map, event_enum));
}
+
if (info.alert_cmd)
- execute_alert_cmd(event, dev, disc);
+ execute_alert_cmd(event_name, dev, disc);
- if (info.mailaddr && (strncmp(event, "Fail", 4) == 0 ||
- strncmp(event, "Test", 4) == 0 ||
- strncmp(event, "Spares", 6) == 0 ||
- strncmp(event, "Degrade", 7) == 0)) {
- send_event_email(event, dev, disc);
+ if (info.mailaddr && (event_enum == EVENT_FAIL ||
+ event_enum == EVENT_TEST_MESSAGE ||
+ event_enum == EVENT_SPARES_MISSING ||
+ event_enum == EVENT_DEGRADED_ARRAY)) {
+ send_event_email(event_name, dev, disc);
}
if (info.dosyslog)
- log_event_to_syslog(event, dev, disc);
+ log_event_to_syslog(event_enum, event_name, dev, disc);
}
static int check_array(struct state *st, struct mdstat_ent *mdstat,
@@ -546,7 +585,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
unsigned long redundancy_only_flags = 0;
if (info.test)
- alert("TestMessage", dev, NULL);
+ alert(EVENT_TEST_MESSAGE, 0, dev, NULL);
retval = 0;
@@ -595,7 +634,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
*/
if (sra->array.level == 0 || sra->array.level == -1) {
if (!st->err && !st->from_config)
- alert("DeviceDisappeared", dev, " Wrong-Level");
+ alert(EVENT_DEVICE_DISAPPEARED, 0, dev, " Wrong-Level");
st->err++;
goto out;
}
@@ -612,7 +651,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
st->percent = RESYNC_NONE;
new_array = 1;
if (!is_container)
- alert("NewArray", st->devname, NULL);
+ alert(EVENT_NEW_ARRAY, 0, st->devname, NULL);
}
if (st->utime == array.utime && st->failed == sra->array.failed_disks &&
@@ -625,29 +664,20 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
}
if (st->utime == 0 && /* new array */
mse->pattern && strchr(mse->pattern, '_') /* degraded */)
- alert("DegradedArray", dev, NULL);
+ alert(EVENT_DEGRADED_ARRAY, 0, dev, NULL);
if (st->utime == 0 && /* new array */ st->expected_spares > 0 &&
sra->array.spare_disks < st->expected_spares)
- alert("SparesMissing", dev, NULL);
+ alert(EVENT_SPARES_MISSING, 0, dev, NULL);
if (st->percent < 0 && st->percent != RESYNC_UNKNOWN &&
mse->percent >= 0)
- alert("RebuildStarted", dev, NULL);
+ alert(EVENT_REBUILD_STARTED, 0, dev, NULL);
if (st->percent >= 0 && mse->percent >= 0 &&
(mse->percent / increments) > (st->percent / increments)) {
- char percentalert[18];
- /*
- * "RebuildNN" (10 chars) or "RebuildStarted" (15 chars)
- */
-
if((mse->percent / increments) == 0)
- snprintf(percentalert, sizeof(percentalert),
- "RebuildStarted");
+ alert(EVENT_REBUILD_STARTED, 0, dev, NULL);
else
- snprintf(percentalert, sizeof(percentalert),
- "Rebuild%02d", mse->percent);
-
- alert(percentalert, dev, NULL);
+ alert(EVENT_REBUILD, mse->percent, dev, NULL);
}
if (mse->percent == RESYNC_NONE && st->percent >= 0) {
@@ -660,9 +690,9 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
snprintf(cnt, sizeof(cnt),
" mismatches found: %d (on raid level %d)",
sra->mismatch_cnt, sra->array.level);
- alert("RebuildFinished", dev, cnt);
+ alert(EVENT_REBUILD_FINISHED, 0, dev, cnt);
} else
- alert("RebuildFinished", dev, NULL);
+ alert(EVENT_REBUILD_FINISHED, 0, dev, NULL);
}
st->percent = mse->percent;
@@ -716,14 +746,14 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
change = newstate ^ st->devstate[i];
if (st->utime && change && !st->err && !new_array) {
if ((st->devstate[i]&change) & (1 << MD_DISK_SYNC))
- alert("Fail", dev, dv);
+ alert(EVENT_FAIL, 0, dev, dv);
else if ((newstate & (1 << MD_DISK_FAULTY)) &&
(disc.major || disc.minor) &&
st->devid[i] == makedev(disc.major,
disc.minor))
- alert("FailSpare", dev, dv);
+ alert(EVENT_FAIL_SPARE, 0, dev, dv);
else if ((newstate&change) & (1 << MD_DISK_SYNC))
- alert("SpareActive", dev, dv);
+ alert(EVENT_SPARE_ACTIVE, 0, dev, dv);
}
st->devstate[i] = newstate;
st->devid[i] = makedev(disc.major, disc.minor);
@@ -747,7 +777,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
disappeared:
if (!st->err && !is_container)
- alert("DeviceDisappeared", dev, NULL);
+ alert(EVENT_DEVICE_DISAPPEARED, 0, dev, NULL);
st->err++;
goto out;
}
@@ -806,7 +836,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist)
st->parent_devnm[0] = 0;
*statelist = st;
if (info.test)
- alert("TestMessage", st->devname, NULL);
+ alert(EVENT_TEST_MESSAGE, 0, st->devname, NULL);
new_found = 1;
}
return new_found;
@@ -1029,7 +1059,7 @@ static void try_spare_migration(struct state *statelist)
if (devid > 0 &&
move_spare(from->devname, to->devname,
devid)) {
- alert("MoveSpare", to->devname, from->devname);
+ alert(EVENT_MOVE_SPARE, 0, to->devname, from->devname);
break;
}
}
--
2.38.1
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