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Commit | Line | Data |
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1cea325b ER |
1 | #!/bin/sh |
2 | # | |
3 | # geninitrd functions | |
4 | ||
5 | # Find root device from fstab. | |
6 | # | |
7 | # @param string $fstab location of /etc/fstab | |
1cea325b ER |
8 | # @return false on failure |
9 | # | |
10 | # Sets global variables: | |
11 | # - $rootdev | |
5101a385 | 12 | # - $rootdev_add |
1cea325b ER |
13 | # - $rootFS |
14 | # | |
15 | find_root() { | |
16 | local fstab="$1" | |
ca2c2012 | 17 | local function="${PROGRAM:+$PROGRAM: }find_root" |
5101a385 | 18 | local rootopt |
1cea325b | 19 | |
8bc082c8 | 20 | eval $(awk '!/^[\t ]*#/ && $2 == "/" {printf("rootdev=\"%s\"\nrootFs=\"%s\"\nrootopt=\"%s\"\n", $1, $3, $4)}' $fstab) |
1cea325b | 21 | if [ -z "$rootdev" ]; then |
8bc082c8 | 22 | echo >&2 "$function: can't find fstab entry for root mountpoint" |
1cea325b ER |
23 | return 1 |
24 | fi | |
25 | ||
5101a385 AM |
26 | # additional devices needed (xfs logdev) |
27 | rootdev_add=$(echo "$rootopt" | awk -F',' '{ for (i=1; i<=NF; i++) { if ($i ~ /^logdev=/) { gsub(/^logdev=/, NIL, $i); print $i; } } }') | |
28 | ||
1cea325b ER |
29 | case $rootdev in |
30 | LABEL=*) | |
31 | if [ ! -x /sbin/blkid ]; then | |
32 | echo >&2 "$function: /sbin/blkid is missing" | |
33 | return 2 | |
34 | fi | |
35 | ||
36 | local label=${rootdev#"LABEL="} | |
10d8618c | 37 | local dev=$(/sbin/blkid -l -t LABEL="$label" -o device) |
8bc082c8 ER |
38 | if [ "$dev" ]; then |
39 | if [ ! -r "$dev" ]; then | |
40 | echo >&2 "$function: blkid returned device $dev which doesn't exist" | |
41 | return 2 | |
42 | fi | |
1cea325b ER |
43 | rootdev=$dev |
44 | fi | |
45 | ;; | |
46 | ||
47 | UUID=*) | |
48 | if [ ! -x /sbin/blkid ]; then | |
49 | echo >&2 "$function: /sbin/blkid is missing" | |
50 | return 2 | |
51 | fi | |
52 | ||
53 | local uuid=${rootdev#"UUID="} | |
10d8618c | 54 | local dev=$(/sbin/blkid -l -t UUID="$uuid" -o device) |
1cea325b | 55 | |
8bc082c8 ER |
56 | if [ "$dev" ]; then |
57 | if [ ! -r "$dev" ]; then | |
58 | echo >&2 "$function: blkid returned device $dev which doesn't exist" | |
59 | return 2 | |
60 | fi | |
1cea325b ER |
61 | rootdev=$dev |
62 | fi | |
63 | ;; | |
f2581979 | 64 | esac |
65 | ||
66 | case $rootdev in | |
d348a28e | 67 | /dev/dm-* | /dev/mapper/*) |
b6c4aab1 | 68 | local node |
ada7e429 | 69 | node=$(dm_lvm2_name "$rootdev") || return 1 |
b6c4aab1 ER |
70 | if [ "$node" ]; then |
71 | rootdev="$node" | |
72 | fi | |
d348a28e | 73 | ;; |
74 | esac | |
b6c4aab1 | 75 | |
6d2c63ed ER |
76 | if [ "$rootFs" = "nfs" ]; then |
77 | rootdev="/dev/nfs" | |
78 | return 0 | |
79 | fi | |
80 | ||
1cea325b ER |
81 | if [ ! -r "$rootdev" ]; then |
82 | echo >&2 "$function: can't find real device for $rootdev" | |
83 | return 1 | |
84 | fi | |
85 | ||
86 | return 0 | |
87 | } | |
b6c4aab1 ER |
88 | |
89 | # resolve /dev/dm-0 to lvm2 node | |
dc006e4d | 90 | # which they got from blkid program fs was specifed as UUID= in fstab |
b6c4aab1 ER |
91 | dm_lvm2_name() { |
92 | local node="$1" | |
edecd1e2 | 93 | local dm_minor |
e211ded9 ER |
94 | |
95 | if [ ! -b "$node" ]; then | |
96 | echo >&2 "dm_lvm2_name: $node is not a block device" | |
97 | return 1 | |
98 | fi | |
99 | ||
edecd1e2 ER |
100 | case $node in |
101 | /dev/dm-*) | |
102 | dm_minor=${node#/dev/dm-} | |
103 | ;; | |
104 | /dev/mapper/*) | |
105 | dm_minor=$(ls -l $node | awk '{print $6}') | |
106 | ;; | |
107 | esac | |
108 | ||
8bc082c8 ER |
109 | local lvm_path=$(/sbin/lvdisplay -c 2>/dev/null | awk -F: -vn=$dm_minor '{node=$1; major=$12; minor=$13; if (n == minor) print node}' | xargs) |
110 | if [ -z "$lvm_path" ]; then | |
111 | # XXX: this could happen also for non-lvm nodes? | |
a14a054a ER |
112 | cat >&2 <<-EOF |
113 | LVM doesn't recognize device-mapper node with minor $dm_minor | |
114 | ||
115 | In case your Physical Volumes are device mapper nodes, you should add to lvm.conf: | |
116 | types = [ "device-mapper", 254 ] | |
117 | ||
118 | In case the LVM nodes are not present yet, it could be fixed by running: | |
119 | # vgscan --mknodes | |
120 | EOF | |
8bc082c8 ER |
121 | return 2 |
122 | fi | |
123 | if [ ! -r "$lvm_path" ]; then | |
124 | echo >&2 "lvdisplay returned $lvm_path which doesn't exist in filesystem; try running 'vgscan --mknodes'." | |
125 | return 2 | |
126 | fi | |
18a69561 | 127 | echo $lvm_path |
b6c4aab1 | 128 | } |
bc0d6f2d ER |
129 | |
130 | # try to resolve /dev/dm-0 to item from /dev/mapper dir | |
131 | dm_longname() { | |
132 | local node="$1" | |
133 | local ret | |
14da5fc6 ER |
134 | local dm_major=$(awk '$2 == "device-mapper" {print $1}' /proc/devices) |
135 | local dm_minor=${node#/dev/dm-} | |
bc0d6f2d | 136 | |
6ef1a353 | 137 | local dm_name=$(dmsetup info -c --noheadings -j $dm_major -m $dm_minor | awk -F: '{print $1}') |
14da5fc6 | 138 | echo "/dev/mapper/$dm_name" |
bc0d6f2d | 139 | } |