1 files changed, 86 insertions, 0 deletions
diff --git a/cmd/zed/zed.d/io-email.sh b/cmd/zed/zed.d/io-email.sh
new file mode 100755
index 000000000..6cfe3c7f7
--- /dev/null
+++ b/cmd/zed/zed.d/io-email.sh
@@ -0,0 +1,86 @@
+#!/bin/sh
+#
+# Send email to ZED_EMAIL in response to a CHECKSUM or IO zevent.
+# Only one message per ZED_EMAIL_INTERVAL_SECS will be sent for a given
+#   class/pool/vdev combination.  This protects against spamming the recipient
+#   should multiple events occur together in time for the same pool/device.
+# Exit codes:
+#   0: email sent
+#   1: email failed
+#   2: email suppressed
+#   3: missing executable
+#   4: unsupported event class
+#   5: internal error
+# State File Format:
+#   POOL:VDEV_PATH:TIME_OF_LAST_EMAIL
+#
+test -f "${ZED_SCRIPT_DIR}/zed.rc" && . "${ZED_SCRIPT_DIR}/zed.rc"
+
+test -n "${ZEVENT_POOL}" || exit 5
+test -n "${ZEVENT_SUBCLASS}" || exit 5
+test -n "${ZEVENT_VDEV_PATH}" || exit 5
+
+if test "${ZEVENT_SUBCLASS}" != "checksum" \
+    -a  "${ZEVENT_SUBCLASS}" != "io"; then
+  logger -t "${ZED_SYSLOG_TAG:=zed}" \
+    -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
+    `basename "$0"`: unsupported event class \"${ZEVENT_SUBCLASS}\"
+  exit 4
+fi
+
+# Only send email if ZED_EMAIL has been configured.
+test -n "${ZED_EMAIL}" || exit 2
+
+# Ensure requisite executables are installed.
+if ! command -v "${MAIL:=mail}" >/dev/null 2>&1; then
+  logger -t "${ZED_SYSLOG_TAG:=zed}" \
+    -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
+    `basename "$0"`: "${MAIL}" not installed
+  exit 3
+fi
+
+NAME="zed.${ZEVENT_SUBCLASS}.email"
+LOCKFILE="${ZED_LOCKDIR:=/var/lock}/${NAME}.lock"
+STATEFILE="${ZED_RUNDIR:=/var/run}/${NAME}.state"
+
+# Obtain lock to ensure mutual exclusion for accessing state.
+exec 8> "${LOCKFILE}"
+flock -x 8
+
+# Query state for last time email was sent for this pool/vdev.
+TIME_NOW=`date +%s`
+TIME_LAST=`egrep "^${ZEVENT_POOL}:${ZEVENT_VDEV_PATH}:" "${STATEFILE}" \
+  2>/dev/null | cut -d: -f3`
+if test -n "${TIME_LAST}"; then
+  TIME_DELTA=`expr "${TIME_NOW}" - "${TIME_LAST}"`
+  if test "${TIME_DELTA}" -lt "${ZED_EMAIL_INTERVAL_SECS:=3600}"; then
+    exit 2
+  fi
+fi
+
+"${MAIL}" -s "ZFS ${ZEVENT_SUBCLASS} error for ${ZEVENT_POOL} on `hostname`" \
+  "${ZED_EMAIL}" <<EOF
+A ZFS ${ZEVENT_SUBCLASS} error has been detected:
+
+   eid: ${ZEVENT_EID}
+  host: `hostname`
+  time: ${ZEVENT_TIME_STRING}
+  pool: ${ZEVENT_POOL}
+  vdev: ${ZEVENT_VDEV_TYPE}:${ZEVENT_VDEV_PATH}
+EOF
+MAIL_STATUS=$?
+
+# Update state.
+egrep -v "^${ZEVENT_POOL}:${ZEVENT_VDEV_PATH}:" "${STATEFILE}" \
+  2>/dev/null > "${STATEFILE}.$$"
+echo "${ZEVENT_POOL}:${ZEVENT_VDEV_PATH}:${TIME_NOW}" >> "${STATEFILE}.$$"
+mv -f "${STATEFILE}.$$" "${STATEFILE}"
+
+if test "${MAIL_STATUS}" -ne 0; then
+  logger -t "${ZED_SYSLOG_TAG:=zed}" \
+    -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
+    `basename "$0"`: "${MAIL}" exit="${MAIL_STATUS}"
+  exit 1
+fi
+
+exit 0