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157 lines
4.2 KiB
157 lines
4.2 KiB
#!/bin/sh |
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# Copy from parse-nfsroot.sh |
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root_to_var() { |
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local v=${1}: |
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set -- |
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while [ -n "$v" ]; do |
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set -- "$@" "${v%%:*}" |
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v=${v#*:} |
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done |
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unset nfs server path options |
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# Ugly: Can't -z test $path after the case, since it might be allowed |
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# to be empty for root=nfs |
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nfs=$1 |
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case $# in |
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0|1);; |
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2) path=$2;; |
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3) |
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# This is ultra ugly. But we can't decide in which position path |
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# sits without checking if the string starts with '/' |
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case $2 in |
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/*) path=$2; options=$3;; |
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*) server=$2; path=$3;; |
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esac |
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;; |
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*) server=$2; path=$3; options=$4; |
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esac |
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# Does it really start with '/'? |
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[ -n "${path%%/*}" ] && path="error"; |
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#Fix kernel legacy style separating path and options with ',' |
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if [ "$path" != "${path#*,}" ] ; then |
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options=${path#*,} |
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path=${path%%,*} |
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fi |
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} |
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. /lib/dracut-lib.sh |
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PATH=$PATH:/sbin:/usr/sbin |
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if getarg rdnetdebug ; then |
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exec > /tmp/nfsroot.$1.$$.out |
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exec 2>> /tmp/nfsroot.$1.$$.out |
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set -x |
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fi |
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# Huh? Empty $1? |
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[ -z "$1" ] && exit 1 |
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# Huh? Empty $2? |
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[ -z "$2" ] && exit 1 |
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# Huh? Empty $3? |
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[ -z "$3" ] && exit 1 |
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# root is in the form root=nfs[4]:[server:]path[:options], either from |
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# cmdline or dhcp root-path |
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netif="$1" |
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root="$2" |
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NEWROOT="$3" |
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# Continue if nfs prefix |
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case "${root%%:*}" in |
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nfs|nfs4);; |
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*) return;; |
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esac |
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root_to_var $root |
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#Load other data that might provide info |
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[ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override |
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[ -f /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts |
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#Empty path means try dhcp root-path, this is ok here since parse-nfsroot.sh |
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#already takes care of nfs:... formatted root-path |
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[ -z "$path" ] && root_to_var $nfs:$new_root_path |
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#Empty path defaults to "/tftpboot/%s" only in nfsroot.txt legacy mode |
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[ -z "$path" ] && [ "$(getarg root=)" = "/dev/nfs" ] && path="/tftpboot/%s" |
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if [ -z "$server" ] ; then |
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# XXX new_dhcp_next_server is unconfirmed this is an assumption |
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for var in $srv $new_dhcp_server_identifier $new_dhcp_next_server $new_root_path '' ; do |
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[ -n "$var" ] && server=$var && break; |
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done |
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# XXX This blindly assumes that if new_root_path has to used that |
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# XXX it really can be used as server |
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server=${server%%:*} |
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fi |
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[ -z "$server" ] && die "Required parameter 'server' is missing" |
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# Kernel replaces first %s with host name, and falls back to the ip address |
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# if it isn't set. Only the first %s is substituted. |
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if [ "${path#*%s}" != "$path" ]; then |
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ip=$(ip -o -f inet addr show $netif) |
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ip=${ip%%/*} |
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ip=${ip##* } |
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read node < /proc/sys/kernel/hostname |
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[ "$node" = "(none)" ] && node=$ip |
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path=${path%%%s*}$node${path#*%s} |
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fi |
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# Look through the options and remove rw/locking options |
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OLDIFS=$IFS |
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IFS=, |
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for f in $options ; do |
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[ "$f" = "ro" -o "$f" = "rw" ] && nfsrw=$f && continue |
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[ "$f" = "lock" -o "$f" = "nolock" ] && nfslock=$f && continue |
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flags=${flags:+$flags,}$f |
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done |
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IFS=$OLDIFS |
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options=$flags |
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# Override rw/ro if set on cmdline |
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getarg ro && nfsrw=ro |
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getarg rw && nfsrw=rw |
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# Default to ro if unset |
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[ -z "$nfsrw" ] && nfsrw=ro |
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options=${options:+$options,}$nfsrw |
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# Start rpcbind or rpcbind |
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# FIXME occasionally saw 'rpcbind: fork failed: No such device' -- why? |
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[ -x /sbin/portmap ] && [ -z "$(pidof portmap)" ] && portmap |
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[ -x /sbin/rpcbind ] && [ -z "$(pidof rpcbind)" ] && rpcbind |
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if [ "$nfs" = "nfs4" ]; then |
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# Start rpc.statd as mount won't let us use locks on a NFSv4 |
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# filesystem without talking to it. NFSv4 does locks internally, |
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# rpc.lockd isn't needed |
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[ -z "$(pidof rpc.statd)" ] && rpc.statd |
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# XXX really needed? Do we need non-root users before we start it in |
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# XXX the real root image? |
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[ -z "$(pidof rpc.idmapd)" ] && rpc.idmapd |
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# XXX Should we loop here? |
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mount -t nfs4 -o$options${nfslock+,$nfslock} \ |
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$server:$path $NEWROOT \ |
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&& { [ -e /dev/root ] || >/dev/root ; } |
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else |
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# NFSv{2,3} doesn't support using locks as it requires a helper to transfer |
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# the rpcbind state to the new root |
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[ "$nfslock" = "lock" ] && \ |
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warn "Locks unsupported on NFSv{2,3}, using nolock" 1>&2 |
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# XXX Should we loop here? |
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mount -t nfs -o$options${options:+,}nolock $server:$path $NEWROOT \ |
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&& { [ -e /dev/root ] || >/dev/root ; } |
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fi
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