1 #!/sbin/sh
2 #
3 # CDDL HEADER START
4 #
5 # The contents of this file are subject to the terms of the
6 # Common Development and Distribution License (the "License").
7 # You may not use this file except in compliance with the License.
8 #
9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 # or http://www.opensolaris.org/os/licensing.
11 # See the License for the specific language governing permissions
12 # and limitations under the License.
13 #
14 # When distributing Covered Code, include this CDDL HEADER in each
15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 # If applicable, add the following below this CDDL HEADER, with the
17 # fields enclosed by brackets "[]" replaced with your own identifying
18 # information: Portions Copyright [yyyy] [name of copyright owner]
19 #
20 # CDDL HEADER END
21 #
22 #
23 # Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 # Copyright 2017 Nexenta Systems, Inc. All rights reserved.
25 #
26
27 . /lib/svc/share/smf_include.sh
28 . /lib/svc/share/fs_include.sh
29
30 #
31 # mksavedir
32 # Make sure that $DUMPADM_SAVDIR is set and exists.
33 #
34 mksavedir ()
35 {
36 [ -z "$DUMPADM_SAVDIR" ] && DUMPADM_SAVDIR=/var/crash
37 [ -d "$DUMPADM_SAVDIR" ] || /usr/bin/mkdir -m 0700 -p $DUMPADM_SAVDIR
38 }
39
40 #
41 # We haven't run savecore on a dump device yet
42 #
43 savedev=none
44
45 #
46 # If we previously crashed early in boot before dumpadm was used to configure
47 # an alternate dump device, then the dump is in the primary swap partition,
48 # which was configured as the dump device by the first swapadd early in boot.
49 # Thus before we run dumpadm to configure the dump device, we first run
50 # savecore to check the swap partition for a dump; this is run in the
51 # foreground to reduce the chances of overwriting the dump.
52 #
53 # This does not apply for zfs root systems that use a zvol for dump;
54 # for such systems the dedicated dump device is appointed during startup
55 # of the filesystem/usr:default instance before any swap is added.
56 # Therefore we must check that the dump device is a swap device here -
57 # if not then we'll run savecore here in the foreground and prevent
58 # our dependent services coming online until we're done.
59 #
60
61 rootiszfs=0
62 alreadydedicated=0
63
64 readmnttab / </etc/mnttab
65 if [ "$fstype" = zfs ] ; then
66 rootiszfs=1
67 if [ -x /usr/sbin/dumpadm ]; then
68 if /usr/sbin/dumpadm 2>/dev/null | grep "Dump device:" | \
69 grep '(dedicated)' > /dev/null 2>&1; then
70 alreadydedicated=1
71 fi
72 fi
73 fi
74
75 if [ -x /usr/bin/savecore -a \
76 \( ! $rootiszfs -eq 1 -o $alreadydedicated -eq 0 \) ]; then
77 [ -r /etc/dumpadm.conf ] && . /etc/dumpadm.conf
78
79 if [ "x$DUMPADM_ENABLE" != xno ] && mksavedir; then
80 /usr/bin/savecore $DUMPADM_SAVDIR
81 shift $#
82 set -- `/usr/sbin/dumpadm 2>/dev/null | /usr/bin/grep 'device:'`
83 savedev=${3:-none}
84 else
85 #
86 # dumpadm -n is in effect, but we can still run savecore
87 # to raise an event with initial panic detail extracted
88 # from the dump header.
89 #
90 /usr/bin/savecore -c
91 fi
92 fi
93
94 if [ ! -x /usr/bin/savecore ]; then
95 echo "WARNING: /usr/bin/savecore is missing or not executable" >& 2
96 fi
97
98 #
99 # Now run dumpadm to configure the dump device based on the settings
100 # previously saved by dumpadm. See dumpadm(1m) for instructions on
101 # how to modify the dump settings.
102 #
103 if [ -x /usr/sbin/dumpadm ]; then
104 /usr/sbin/dumpadm -u || $SMF_EXIT_ERR_CONFIG
105 else
106 echo "WARNING: /usr/sbin/dumpadm is missing or not executable" >& 2
107 exit $SMF_EXIT_ERR_CONFIG
108 fi
109
110 if [ -r /etc/dumpadm.conf ]; then
111 . /etc/dumpadm.conf
112 else
113 echo "WARNING: /etc/dumpadm.conf is missing or unreadable" >& 2
114 exit $SMF_EXIT_ERR_CONFIG
115 fi
116
117 #
118 # If the savecore executable is absent then we're done
119 #
120 if [ ! -x /usr/bin/savecore ]; then
121 exit $SMF_EXIT_ERR_CONFIG
122 fi
123
124 #
125 # Now that dumpadm has reconfigured /dev/dump, we need to run savecore again
126 # because the dump device may have changed. If the earlier savecore had
127 # saved the dump, savecore will just exit immediately.
128 #
129
130 isswap=0
131 swapchanged=0
132 if /usr/sbin/swap -l 2>/dev/null | grep "^${DUMPADM_DEVICE} " \
133 >/dev/null 2>&1; then
134 isswap=1
135 if [ "x$savedev" != "x$DUMPADM_DEVICE" ]; then
136 swapchanged=1
137 fi
138 fi
139
140 if [ "x$DUMPADM_ENABLE" != xno ]; then
141 if [ $isswap -eq 1 ]; then
142 #
143 # If the dump device is part of swap, we only need to run
144 # savecore a second time if the device is different from the
145 # swap device on which we initially ran savecore.
146 #
147 if [ $swapchanged -eq 1 ]; then
148 mksavedir && /usr/bin/savecore $DUMPADM_SAVDIR &
149 fi
150 else
151 #
152 # The dump device couldn't have been dedicated before we
153 # ran dumpadm, so we must execute savecore again.
154 #
155 mksavedir && /usr/bin/savecore $DUMPADM_SAVDIR &
156 fi
157 else
158 #
159 # savecore not enabled. Check whether a valid dump is
160 # present on the device and raise an event to signal that,
161 # but avoid sending a duplicate event from the savecore -c
162 # earlier.
163 #
164 if [ $isswap -eq 0 -o $swapchanged -eq 1 ]; then
165 /usr/bin/savecore -c
166 fi
167 fi
168
169 exit $SMF_EXIT_OK