63 lines
1.6 KiB
Bash
Executable File
63 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Preferred format:
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# root=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
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# [root=*] netroot=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
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#
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# nbdopts is a comma separated list of options to give to nbd-client
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#
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# root= takes precedence over netroot= if root=nbd[...]
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#
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# This script is sourced, so root should be set. But let's be paranoid
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[ -z "$root" ] && root=$(getarg root=)
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if [ -z "$netroot" ]; then
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for netroot in $(getargs netroot=); do
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[ "${netroot%%:*}" = "nbd" ] && break
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done
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[ "${netroot%%:*}" = "nbd" ] || unset netroot
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fi
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# Root takes precedence over netroot
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if [ "${root%%:*}" = "nbd" ]; then
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if [ -n "$netroot" ]; then
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warn "root takes precedence over netroot. Ignoring netroot"
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fi
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netroot=$root
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unset root
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fi
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# If it's not nbd we don't continue
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[ "${netroot%%:*}" = "nbd" ] || return
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# Check required arguments
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nroot=${netroot#nbd:}
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server=${nroot%%:*}
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if [ "${server%"${server#?}"}" = "[" ]; then
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server=${nroot#[}
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server=${server%%]:*}\]
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nroot=${nroot#*]:}
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else
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nroot=${nroot#*:}
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fi
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port=${nroot%%:*}
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unset nroot
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[ -z "$server" ] && die "Argument server for nbdroot is missing"
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[ -z "$port" ] && die "Argument port for nbdroot is missing"
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# NBD actually supported?
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incol2 /proc/devices nbd || modprobe nbd || die "nbdroot requested but kernel/initrd does not support nbd"
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# Done, all good!
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# shellcheck disable=SC2034
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rootok=1
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# Shut up init error check
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if [ -z "$root" ]; then
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root=block:/dev/root
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# the device is created and waited for in ./nbdroot.sh
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fi
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