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mdadm/0063-Mdmonitor-Split-alert-into-separate-functions.patch

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From 3698867194f27fdd7824b8bdd172d619a2c087cc Mon Sep 17 00:00:00 2001
From: Mateusz Grzonka <mateusz.grzonka@intel.com>
Date: Wed, 7 Sep 2022 14:56:49 +0200
Subject: [PATCH] Mdmonitor: Split alert() into separate functions
Signed-off-by: Mateusz Grzonka <mateusz.grzonka@intel.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
---
Monitor.c | 186 ++++++++++++++++++++++++++++--------------------------
1 file changed, 95 insertions(+), 91 deletions(-)
diff --git a/Monitor.c b/Monitor.c
index 7d7dc4d..0036e8c 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -66,7 +66,7 @@ struct alert_info {
static int make_daemon(char *pidfile);
static int check_one_sharer(int scan);
static void write_autorebuild_pid(void);
-static void alert(char *event, char *dev, char *disc, struct alert_info *info);
+static void alert(const char *event, const char *dev, const char *disc, struct alert_info *info);
static int check_array(struct state *st, struct mdstat_ent *mdstat,
int test, struct alert_info *info,
int increments, char *prefer);
@@ -407,111 +407,115 @@ static void write_autorebuild_pid()
}
}
-static void alert(char *event, char *dev, char *disc, struct alert_info *info)
+static void execute_alert_cmd(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
+ int pid = fork();
+
+ switch (pid) {
+ default:
+ waitpid(pid, NULL, 0);
+ break;
+ case -1:
+ pr_err("Cannot fork to execute alert command");
+ break;
+ case 0:
+ execl(info->alert_cmd, info->alert_cmd, event, dev, disc, NULL);
+ exit(2);
+ }
+}
+
+static void send_event_email(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
+ FILE *mp, *mdstat;
+ char hname[256];
+ char buf[BUFSIZ];
+ int n;
+
+ mp = popen(Sendmail, "w");
+ if (!mp) {
+ pr_err("Cannot open pipe stream for sendmail.\n");
+ return;
+ }
+
+ gethostname(hname, sizeof(hname));
+ signal(SIGPIPE, SIG_IGN);
+ if (info->mailfrom)
+ fprintf(mp, "From: %s\n", info->mailfrom);
+ 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, hname);
+ 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);
+
+ 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);
+
+ mdstat = fopen("/proc/mdstat", "r");
+ if (!mdstat) {
+ pr_err("Cannot open /proc/mdstat\n");
+ pclose(mp);
+ return;
+ }
+
+ fprintf(mp, "The /proc/mdstat file currently contains the following:\n\n");
+ while ((n = fread(buf, 1, sizeof(buf), mdstat)) > 0)
+ n = fwrite(buf, 1, n, mp);
+ fclose(mdstat);
+ pclose(mp);
+}
+
+static void log_event_to_syslog(const char *event, 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)
+ 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)
+ 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, dev, disc);
+ else if (disc)
+ syslog(priority, "%s event detected on md device %s: %s", event, dev, disc);
+ else
+ syslog(priority, "%s event detected on md device %s", event, dev);
+}
+
+static void alert(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
if (!info->alert_cmd && !info->mailaddr && !info->dosyslog) {
time_t now = time(0);
printf("%1.15s: %s on %s %s\n", ctime(&now) + 4,
event, dev, disc?disc:"unknown device");
}
- if (info->alert_cmd) {
- int pid = fork();
- switch(pid) {
- default:
- waitpid(pid, NULL, 0);
- break;
- case -1:
- break;
- case 0:
- execl(info->alert_cmd, info->alert_cmd,
- event, dev, disc, NULL);
- exit(2);
- }
- }
+ if (info->alert_cmd)
+ execute_alert_cmd(event, dev, disc, info);
+
if (info->mailaddr && (strncmp(event, "Fail", 4) == 0 ||
strncmp(event, "Test", 4) == 0 ||
strncmp(event, "Spares", 6) == 0 ||
strncmp(event, "Degrade", 7) == 0)) {
- FILE *mp = popen(Sendmail, "w");
- if (mp) {
- FILE *mdstat;
- char hname[256];
-
- gethostname(hname, sizeof(hname));
- signal_s(SIGPIPE, SIG_IGN);
-
- if (info->mailfrom)
- fprintf(mp, "From: %s\n", info->mailfrom);
- 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, hname);
-
- fprintf(mp,
- "This is an automatically generated mail message from %s\n", Name);
- fprintf(mp, "running on %s\n\n", hname);
-
- fprintf(mp,
- "A %s event had been detected on md device %s.\n\n", event, 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, "Faithfully yours, etc.\n");
-
- mdstat = fopen("/proc/mdstat", "r");
- if (mdstat) {
- char buf[8192];
- int n;
- fprintf(mp,
- "\nP.S. The /proc/mdstat file currently contains the following:\n\n");
- while ((n = fread(buf, 1, sizeof(buf),
- mdstat)) > 0)
- n = fwrite(buf, 1, n, mp);
- fclose(mdstat);
- }
- pclose(mp);
- }
+ send_event_email(event, dev, disc, info);
}
- /* log the event to syslog maybe */
- if (info->dosyslog) {
- /* 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)
- 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)
- 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, dev, disc);
- else if (disc)
- syslog(priority,
- "%s event detected on md device %s: %s",
- event, dev, disc);
- else
- syslog(priority,
- "%s event detected on md device %s",
- event, dev);
- }
+ if (info->dosyslog)
+ log_event_to_syslog(event, dev, disc);
}
static int check_array(struct state *st, struct mdstat_ent *mdstat,
--
2.35.3
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