OpenWrt – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 #!/bin/sh /etc/rc.common
2  
3 START=15
4  
5 ram_size()
6 {
7 local line
8  
9 while read line; do case "$line" in MemTotal:*) set $line; echo "$2"; break ;; esac; done </proc/meminfo
10 }
11  
12 zram_size() # in megabytes
13 {
14 local zram_size="$( uci -q get system.@system[0].zram_size_mb )"
15 local ram_size="$( ram_size )"
16  
17 if [ -z "$zram_size" ]; then
18 # e.g. 6mb for 16mb-routers or 61mb for 128mb-routers
19 echo $(( ram_size / 2048 ))
20 else
21 echo "$zram_size"
22 fi
23 }
24  
25 zram_applicable()
26 {
27 local zram_dev="$1"
28  
29 [ -e "$zram_dev" ] || {
30 logger -s -t zram_applicable -p daemon.crit "[ERROR] device '$zram_dev' not found"
31 return 1
32 }
33  
34 which mkswap >/dev/null || {
35 logger -s -t zram_applicable -p daemon.err "[ERROR] 'mkswap' not installed"
36 return 1
37 }
38  
39 which swapon >/dev/null || {
40 logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapon' not installed"
41 return 1
42 }
43  
44 which swapoff >/dev/null || {
45 logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapoff' not installed"
46 return 1
47 }
48 }
49  
50 zram_dev()
51 {
52 local idx="$1"
53 echo "/dev/zram${idx:-0}"
54 }
55  
56 zram_reset()
57 {
58 local dev="$1"
59 local message="$2"
60 local proc_entry="/sys/block/$( basename "$dev" )/reset"
61  
62 logger -s -t zram_reset -p daemon.debug "$message via $proc_entry"
63 echo "1" >"$proc_entry"
64 }
65  
66 zram_getdev()
67 {
68 #get unallocated zram dev
69 local zdev=$( zram_dev )
70  
71 if [ "$(mount | grep $zdev)" ]; then
72 local idx=`cat /sys/class/zram-control/hot_add`
73 zdev="$( zram_dev $idx )"
74 fi
75  
76 echo $zdev
77 }
78  
79 zram_comp_algo()
80 {
81 local dev="$1"
82 local zram_comp_algo="$( uci -q get system.@system[0].zram_comp_algo )"
83  
84 if [ -z "$zram_comp_algo" ] || [ ! -e /sys/block/$( basename $dev )/comp_algorithm ]; then
85 return 0
86 fi
87  
88 if [ `grep -c "$zram_comp_algo" /sys/block/$( basename $dev )/comp_algorithm` -ne 0 ]; then
89 logger -s -t zram_comp_algo -p daemon.debug "Set compression algorithm '$zram_comp_algo' for zram '$dev'"
90 echo $zram_comp_algo > "/sys/block/$( basename $dev )/comp_algorithm"
91 else
92 logger -s -t zram_comp_algo -p daemon.debug "Compression algorithm '$zram_comp_algo' is not supported for '$dev'"
93 fi
94 }
95  
96 zram_comp_streams()
97 {
98 local dev="$1"
99 local logical_cpus=$( grep -ci "^processor" /proc/cpuinfo )
100 [ $logical_cpus -gt 1 ] || return 1
101 local zram_comp_streams="$( uci -q get system.@system[0].zram_comp_streams )"
102 [ -n "$zram_comp_streams" ] && [ "$zram_comp_streams" -le "$logical_cpus" ] || zram_comp_streams=$logical_cpus
103 if [ -e /sys/block/$( basename $dev )/max_comp_streams ]; then
104 logger -s -t zram_comp_streams -p daemon.debug "Set max compression streams to '$zram_comp_streams' for zram '$dev'"
105 echo $zram_comp_streams > /sys/block/$( basename $dev )/max_comp_streams
106 fi
107 }
108  
109 start()
110 {
111 local zram_size="$( zram_size )"
112 local zram_dev
113  
114 if [ $( grep -cs zram /proc/swaps ) -ne 0 ]; then
115 logger -s -t zram_start -p daemon.notice "[OK] zram swap is already mounted"
116 return 1
117 fi
118  
119 zram_dev="$( zram_getdev )"
120 zram_applicable "$zram_dev" || return 1
121  
122 logger -s -t zram_start -p daemon.debug "activating '$zram_dev' for swapping ($zram_size MegaBytes)"
123  
124 zram_reset "$zram_dev" "enforcing defaults"
125 zram_comp_algo "$zram_dev"
126 zram_comp_streams "$zram_dev"
127 echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
128 mkswap "$zram_dev"
129 swapon "$zram_dev"
130 }
131  
132 stop()
133 {
134 local zram_dev
135  
136 for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
137 logger -s -t zram_stop -p daemon.debug "deactivate swap $zram_dev"
138 swapoff "$zram_dev" && zram_reset "$zram_dev" "claiming memory back"
139 local dev_index="$( echo $zram_dev | grep -o "[0-9]*$" )"
140 if [ $dev_index -ne 0 ]; then
141 logger -s -t zram_stop -p daemon.debug "removing zram $zram_dev"
142 echo $dev_index > /sys/class/zram-control/hot_remove
143 fi
144 } done
145 }
146