---
Monitor.c | 230 +++++++++++++++++++++++++++++++++++++-----------------
1 file changed, 158 insertions(+), 72 deletions(-)
diff --git a/Monitor.c b/Monitor.c
index aa0ee047..80e43ebe 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -73,10 +73,12 @@ enum event {
EVENT_NEW_ARRAY,
EVENT_MOVE_SPARE,
EVENT_TEST_MESSAGE,
+ __SYSLOG_PRIORITY_WARNING,
EVENT_REBUILD_STARTED,
EVENT_REBUILD,
EVENT_REBUILD_FINISHED,
EVENT_SPARES_MISSING,
+ __SYSLOG_PRIORITY_CRITICAL,
EVENT_DEVICE_DISAPPEARED,
EVENT_FAIL,
EVENT_FAIL_SPARE,
@@ -100,17 +102,28 @@ mapping_t events_map[] = {
{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 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);
+struct event_data {
+ enum event event_enum;
+ /**
+ * @event_name: Rebuild event name must be in form "RebuildXX", where XX is rebuild progress.
+ */
+ char event_name[EVENT_NAME_MAX];
+ char message[BUFSIZ];
+ const char *description;
+ const char *dev;
+ const char *disc;
+};
+
static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist);
-static void try_spare_migration(struct state *statelist);
-static void link_containers_with_subarrays(struct state *list);
+static int check_array(struct state *st, struct mdstat_ent *mdstat, int increments, char *prefer);
+static int check_one_sharer(int scan);
#ifndef NO_LIBUDEV
static int check_udev_activity(void);
#endif
+static void link_containers_with_subarrays(struct state *list);
+static int make_daemon(char *pidfile);
+static void try_spare_migration(struct state *statelist);
+static void write_autorebuild_pid(void);
int Monitor(struct mddev_dev *devlist,
char *mailaddr, char *alert_cmd,
@@ -440,7 +453,80 @@ static void write_autorebuild_pid()
}
}
-static void execute_alert_cmd(const char *event_name, const char *dev, const char *disc)
+#define BASE_MESSAGE "%s event detected on md device %s"
+#define COMPONENT_DEVICE_MESSAGE ", component device %s"
+#define DESCRIPTION_MESSAGE ": %s"
+/**
+ * sprint_event_message() - Writes basic message about detected event to destination ptr.
+ * @dest: message destination, should be at least the size of BUFSIZ
+ * @data: event data
+ *
+ * Return: 0 on success, 1 on error
+ */
+static int sprint_event_message(char *dest, const struct event_data *data)
+{
+ if (!dest || !data)
+ return 1;
+
+ if (data->disc && data->description)
+ snprintf(dest, BUFSIZ, BASE_MESSAGE COMPONENT_DEVICE_MESSAGE DESCRIPTION_MESSAGE,
+ data->event_name, data->dev, data->disc, data->description);
+ else if (data->disc)
+ snprintf(dest, BUFSIZ, BASE_MESSAGE COMPONENT_DEVICE_MESSAGE,
+ data->event_name, data->dev, data->disc);
+ else if (data->description)
+ snprintf(dest, BUFSIZ, BASE_MESSAGE DESCRIPTION_MESSAGE,
+ data->event_name, data->dev, data->description);
+ else
+ snprintf(dest, BUFSIZ, BASE_MESSAGE, data->event_name, data->dev);
+
+ return 0;
+}
+
+/**
+ * get_syslog_event_priority() - Determines event priority.
+ * @event_enum: event to be checked
+ *
+ * Return: LOG_CRIT, LOG_WARNING or LOG_INFO
+ */
+static int get_syslog_event_priority(const enum event event_enum)
+{
+ if (event_enum > __SYSLOG_PRIORITY_CRITICAL)
+ return LOG_CRIT;
+ if (event_enum > __SYSLOG_PRIORITY_WARNING)
+ return LOG_WARNING;
+ return LOG_INFO;
+}
+
+/**
+ * is_email_event() - Determines whether email for event should be sent or not.
+ * @event_enum: event to be checked
+ *
+ * Return: true if email should be sent, false otherwise
+ */
+static bool is_email_event(const enum event event_enum)
+{
+ static const enum event email_events[] = {
+ EVENT_FAIL,
+ EVENT_FAIL_SPARE,
+ EVENT_DEGRADED_ARRAY,
+ EVENT_SPARES_MISSING,
+ EVENT_TEST_MESSAGE
+ };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(email_events); ++i) {
+ if (event_enum == email_events[i])
+ return true;
+ }
+ return false;
+}
+
+/**
+ * execute_alert_cmd() - Forks and executes command provided as alert_cmd.
+ * @data: event data
+ */
+static void execute_alert_cmd(const struct event_data *data)
{
int pid = fork();
@@ -452,12 +538,16 @@ static void execute_alert_cmd(const char *event_name, const char *dev, const cha
pr_err("Cannot fork to execute alert command");
break;
case 0:
- execl(info.alert_cmd, info.alert_cmd, event_name, dev, disc, NULL);
+ execl(info.alert_cmd, info.alert_cmd, data->event_name, data->dev, data->disc, NULL);
exit(2);
}
}
-static void send_event_email(const char *event_name, const char *dev, const char *disc)
+/**
+ * send_event_email() - Sends an email about event detected by monitor.
+ * @data: event data
+ */
+static void send_event_email(const struct event_data *data)
{
FILE *mp, *mdstat;
char buf[BUFSIZ];
@@ -475,15 +565,9 @@ static void send_event_email(const char *event_name, const char *dev, const char
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_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_name, dev);
-
- if (disc && disc[0] != ' ')
- fprintf(mp,
- "It could be related to component device %s.\n\n", disc);
- if (disc && disc[0] == ' ')
- fprintf(mp, "Extra information:%s.\n\n", disc);
+ fprintf(mp, "Subject: %s event on %s:%s\n\n", data->event_name, data->dev, info.hostname);
+ fprintf(mp, "This is an automatically generated mail message.\n");
+ fprintf(mp, "%s\n", data->message);
mdstat = fopen("/proc/mdstat", "r");
if (!mdstat) {
@@ -499,58 +583,60 @@ static void send_event_email(const char *event_name, const char *dev, const char
pclose(mp);
}
-static void log_event_to_syslog(const enum event event_enum, const char *event_name, const char *dev, const char *disc)
+/**
+ * log_event_to_syslog() - Logs an event into syslog.
+ * @data: event data
+ */
+static void log_event_to_syslog(const struct event_data *data)
{
int priority;
- /* Log at a different severity depending on the event.
- *
- * These are the critical events: */
- 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 (event_enum == EVENT_REBUILD ||
- event_enum == EVENT_MOVE_SPARE ||
- event_enum == EVENT_SPARES_MISSING)
- priority = LOG_WARNING;
- /* Everything else: */
- else
- priority = LOG_INFO;
-
- if (disc && disc[0] != ' ')
- syslog(priority,
- "%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_name, dev, disc);
- else
- syslog(priority, "%s event detected on md device %s", event_name, dev);
+
+ priority = get_syslog_event_priority(data->event_enum);
+
+ syslog(priority, "%s\n", data->message);
}
-static void alert(const enum event event_enum, const unsigned int progress, const char *dev, const char *disc)
+/**
+ * alert() - Alerts about the monitor event.
+ * @event_enum: event to be sent
+ * @description: event description
+ * @progress: rebuild progress
+ * @dev: md device name
+ * @disc: component device
+ *
+ * If needed function executes alert command, sends an email or logs event to syslog.
+ */
+static void alert(const enum event event_enum, const char *description, const uint8_t progress,
+ const char *dev, const char *disc)
{
- char event_name[EVENT_NAME_MAX];
+ struct event_data data = {.dev = dev, .disc = disc, .description = description};
+
+ if (!dev)
+ return;
if (event_enum == EVENT_REBUILD) {
- snprintf(event_name, sizeof(event_name), "%s%02d",
+ snprintf(data.event_name, sizeof(data.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));
+ snprintf(data.event_name, sizeof(data.event_name), "%s", map_num_s(events_map, event_enum));
}
- if (info.alert_cmd)
- execute_alert_cmd(event_name, dev, disc);
+ data.event_enum = event_enum;
- 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 (sprint_event_message(data.message, &data) != 0) {
+ pr_err("Cannot create event message.\n");
+ return;
}
+ pr_err("%s\n", data.message);
+
+ if (info.alert_cmd)
+ execute_alert_cmd(&data);
+
+ if (info.mailaddr && is_email_event(event_enum))
+ send_event_email(&data);
if (info.dosyslog)
- log_event_to_syslog(event_enum, event_name, dev, disc);
+ log_event_to_syslog(&data);
}
static int check_array(struct state *st, struct mdstat_ent *mdstat,
@@ -575,7 +661,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
unsigned long redundancy_only_flags = 0;
if (info.test)
- alert(EVENT_TEST_MESSAGE, 0, dev, NULL);
+ alert(EVENT_TEST_MESSAGE, NULL, 0, dev, NULL);
retval = 0;
@@ -624,7 +710,7 @@ 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(EVENT_DEVICE_DISAPPEARED, 0, dev, " Wrong-Level");
+ alert(EVENT_DEVICE_DISAPPEARED, "Wrong-Level", 0, dev, NULL);
st->err++;
goto out;
}
@@ -641,7 +727,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
st->percent = RESYNC_NONE;
new_array = 1;
if (!is_container)
- alert(EVENT_NEW_ARRAY, 0, st->devname, NULL);
+ alert(EVENT_NEW_ARRAY, NULL, 0, st->devname, NULL);
}
if (st->utime == array.utime && st->failed == sra->array.failed_disks &&
@@ -654,20 +740,20 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
}
if (st->utime == 0 && /* new array */
mse->pattern && strchr(mse->pattern, '_') /* degraded */)
- alert(EVENT_DEGRADED_ARRAY, 0, dev, NULL);
+ alert(EVENT_DEGRADED_ARRAY, NULL, 0, dev, NULL);
if (st->utime == 0 && /* new array */ st->expected_spares > 0 &&
sra->array.spare_disks < st->expected_spares)
- alert(EVENT_SPARES_MISSING, 0, dev, NULL);
+ alert(EVENT_SPARES_MISSING, NULL, 0, dev, NULL);
if (st->percent < 0 && st->percent != RESYNC_UNKNOWN &&
mse->percent >= 0)
- alert(EVENT_REBUILD_STARTED, 0, dev, NULL);
+ alert(EVENT_REBUILD_STARTED, NULL, 0, dev, NULL);
if (st->percent >= 0 && mse->percent >= 0 &&
(mse->percent / increments) > (st->percent / increments)) {
if((mse->percent / increments) == 0)
- alert(EVENT_REBUILD_STARTED, 0, dev, NULL);
+ alert(EVENT_REBUILD_STARTED, NULL, 0, dev, NULL);
else
- alert(EVENT_REBUILD, mse->percent, dev, NULL);
+ alert(EVENT_REBUILD, NULL, mse->percent, dev, NULL);
}
if (mse->percent == RESYNC_NONE && st->percent >= 0) {
@@ -680,9 +766,9 @@ 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(EVENT_REBUILD_FINISHED, 0, dev, cnt);
+ alert(EVENT_REBUILD_FINISHED, NULL, 0, dev, cnt);
} else
- alert(EVENT_REBUILD_FINISHED, 0, dev, NULL);
+ alert(EVENT_REBUILD_FINISHED, NULL, 0, dev, NULL);
}
st->percent = mse->percent;
@@ -736,14 +822,14 @@ 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(EVENT_FAIL, 0, dev, dv);
+ alert(EVENT_FAIL, NULL, 0, dev, dv);
else if ((newstate & (1 << MD_DISK_FAULTY)) &&
(disc.major || disc.minor) &&
st->devid[i] == makedev(disc.major,
disc.minor))
- alert(EVENT_FAIL_SPARE, 0, dev, dv);
+ alert(EVENT_FAIL_SPARE, NULL, 0, dev, dv);
else if ((newstate&change) & (1 << MD_DISK_SYNC))
- alert(EVENT_SPARE_ACTIVE, 0, dev, dv);
+ alert(EVENT_SPARE_ACTIVE, NULL, 0, dev, dv);
}
st->devstate[i] = newstate;
st->devid[i] = makedev(disc.major, disc.minor);
@@ -767,7 +853,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
disappeared:
if (!st->err && !is_container)
- alert(EVENT_DEVICE_DISAPPEARED, 0, dev, NULL);
+ alert(EVENT_DEVICE_DISAPPEARED, NULL, 0, dev, NULL);
st->err++;
goto out;
}
@@ -827,7 +913,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist)
st->parent_devnm[0] = 0;
*statelist = st;
if (info.test)
- alert(EVENT_TEST_MESSAGE, 0, st->devname, NULL);
+ alert(EVENT_TEST_MESSAGE, NULL, 0, st->devname, NULL);
new_found = 1;
}
return new_found;
@@ -1050,7 +1136,7 @@ static void try_spare_migration(struct state *statelist)
if (devid > 0 &&
move_spare(from->devname, to->devname,
devid)) {
- alert(EVENT_MOVE_SPARE, 0, to->devname, from->devname);
+ alert(EVENT_MOVE_SPARE, NULL, 0, to->devname, from->devname);
break;
}
}
