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1 | #!/bin/sh | |
2 | # | |
3 | # kexec-load Load kernel image with kexec | |
4 | # | |
5 | # chkconfig: 345 99 01 | |
6 | # | |
7 | # description: This tool is used to load a kernel in memory and reboot into the kernel \ | |
8 | # loaded in memory using the kexec system call. | |
9 | # | |
10 | # $Id$ | |
11 | ||
12 | # Source function library | |
13 | . /etc/rc.d/init.d/functions | |
14 | ||
15 | LOAD_KEXEC=yes | |
16 | KERNEL_IMAGE="/boot/vmlinuz" | |
17 | INITRD="/boot/initrd" | |
18 | APPEND="" | |
19 | ||
20 | # Get service config - may override defaults | |
21 | [ -f /etc/sysconfig/kexec ] && . /etc/sysconfig/kexec | |
22 | ||
23 | load() { | |
24 | if [ -z "$APPEND" ]; then | |
25 | local a | |
26 | for a in $(cat /proc/cmdline); do | |
27 | case "$a" in | |
28 | kexec_*=) | |
29 | # skip entries like: | |
30 | # kexec_jump_back_entry=0x01000201a4814e49 | |
31 | ;; | |
32 | *) | |
33 | APPEND="$APPEND $a" | |
34 | esac | |
35 | done | |
36 | fi | |
37 | ||
38 | # convert to real file for readability | |
39 | if [ -L "$KERNEL_IMAGE" ]; then | |
40 | KERNEL_IMAGE=$(readlink -f "$KERNEL_IMAGE") | |
41 | fi | |
42 | if [ -L "$INITRD" ]; then | |
43 | INITRD=$(readlink -f "$INITRD") | |
44 | fi | |
45 | ||
46 | if [ -z "$INITRD" ]; then | |
47 | show "Loading kernel image: %s, args [%s]" "$KERNEL_IMAGE" "$APPEND" | |
48 | kexec -l "$KERNEL_IMAGE" --append="$APPEND" | |
49 | else | |
50 | show "Loading kernel image: %s, initrd %s, args [%s]" "$KERNEL_IMAGE" "$INITRD" "$APPEND" | |
51 | kexec -l "$KERNEL_IMAGE" --initrd="$INITRD" --append="$APPEND" | |
52 | fi | |
53 | RETVAL=$? | |
54 | [ $RETVAL = 0 ] && ok || fail | |
55 | } | |
56 | ||
57 | start() { | |
58 | if [ -f /var/lock/subsys/kexec ]; then | |
59 | return | |
60 | fi | |
61 | touch /var/lock/subsys/kexec | |
62 | } | |
63 | ||
64 | stop() { | |
65 | if ! is_yes "$LOAD_KEXEC" || [ ! -f /sys/kernel/kexec_loaded ]; then | |
66 | return | |
67 | fi | |
68 | ||
69 | # skip if already loaded something | |
70 | if [ "$(cat /sys/kernel/kexec_loaded 2>/dev/null)" = "1" ]; then | |
71 | return | |
72 | fi | |
73 | ||
74 | load | |
75 | rm -f /var/lock/subsys/kexec | |
76 | } | |
77 | ||
78 | status() { | |
79 | if [ "$(cat /sys/kernel/kexec_loaded 2>/dev/null)" = "1" ]; then | |
80 | show "Kexec image loaded"; ok | |
81 | else | |
82 | show "Kexec image is not loaded"; fail | |
83 | fi | |
84 | if [ "$(cat /sys/kernel/kexec_crash_loaded 2>/dev/null)" = 1 ]; then | |
85 | show "Kexec image for kernel crash loaded"; ok | |
86 | else | |
87 | show "Kexec image for kernel crash is not loaded"; fail | |
88 | fi | |
89 | ||
90 | # convert to real file for readability | |
91 | if [ -L "$KERNEL_IMAGE" ]; then | |
92 | KERNEL_IMAGE=$(readlink -f "$KERNEL_IMAGE") | |
93 | fi | |
94 | if [ -L "$INITRD" ]; then | |
95 | INITRD=$(readlink -f "$INITRD") | |
96 | fi | |
97 | INIT_COL=0 show "Configured kernel: %s" "$KERNEL_IMAGE"; echo | |
98 | if [ -n "$INITRD" ]; then | |
99 | INIT_COL=0 show "Configured initrd: %s" "$INITRD"; echo | |
100 | fi | |
101 | } | |
102 | ||
103 | RETVAL=0 | |
104 | # See how we were called. | |
105 | case "$1" in | |
106 | start) | |
107 | start | |
108 | ;; | |
109 | stop) | |
110 | stop | |
111 | ;; | |
112 | restart) | |
113 | stop | |
114 | start | |
115 | ;; | |
116 | load) | |
117 | load | |
118 | ;; | |
119 | status) | |
120 | status | |
121 | ;; | |
122 | *) | |
123 | msg_usage "$0 {start|stop|load|restart|status}" | |
124 | exit 3 | |
125 | esac | |
126 | ||
127 | exit $RETVAL |