mirror of
https://github.com/dracutdevs/dracut.git
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125 lines
3.7 KiB
Bash
Executable File
125 lines
3.7 KiB
Bash
Executable File
#!/bin/sh
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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# ex: ts=8 sw=4 sts=4 et filetype=sh
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type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
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PATH=/usr/sbin:/usr/bin:/sbin:/bin
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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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nfsroot_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" ] && nfsroot_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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command -v portmap >/dev/null && [ -z "$(pidof portmap)" ] && portmap
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command -v rpcbind >/dev/null && [ -z "$(pidof rpcbind)" ] && rpcbind
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if [ "$nfs" = "nfs4" ]; then
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[ ! -d /var/lib/nfs/rpc_pipefs/nfs ] && \
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mount -t rpc_pipefs rpc_pipefs /var/lib/nfs/rpc_pipefs
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# Start rpc.statd as mount won't let us use locks on a NFSv4
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# filesystem without talking to it. NFSv4 does locks internally,
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# rpc.lockd isn't needed
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[ -z "$(pidof rpc.statd)" ] && rpc.statd
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[ -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,nfsvers=3 $server:$path $NEWROOT || \
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mount -t nfs -o$options${options:+,}nolock,nfsvers=2 $server:$path $NEWROOT ; } \
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&& { [ -e /dev/root ] || >/dev/root ; }
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fi
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# inject new exit_if_exists
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echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/initqueue/nfs.sh
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# force udevsettle to break
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> $hookdir/initqueue/work
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