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https://github.com/dracutdevs/dracut.git
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network: add support for netroot=...
This adds support for a command line option netroot=, which is currently equivalent to root=. This will allow us to break out handling in NBD and iSCSI to support constructs such as "root=LABEL=/ netroot=dhcp" to make use of our block device handling with network attached devices. iSCSI has not been changed in this patch as I don't currently have a way to test it.
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a29f15a5b6
commit
aec48753c2
@ -1,12 +1,18 @@
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# We should go last, and default the root if needed
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if [ -z "$root" ]; then
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root=dhcp
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if [ -z "$root" -a -z "$netroot" ]; then
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netroot=dhcp
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fi
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if [ "$root" = "dhcp" -a -z "$netroot" ]; then
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rootok=1
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netroot=dhcp
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unset root
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fi
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# Cleanup any coversions from root->netroot if they are the same
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if [ "$netroot" = "$root" ]; then
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unset root
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fi
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if [ "${netroot+set}" = "set" ]; then
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@ -46,7 +46,7 @@ fi
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# Run the handler; don't store the root, it may change from device to device
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# XXX other variables to export?
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export NEWROOT
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if $handler $netif $root; then
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if $handler $netif $netroot; then
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# Network rootfs mount successful
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[ -f /tmp/dhclient.$netif.lease ] && cp /tmp/dhclient.$netif.lease /tmp/net.$netif.lease
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[ -f /tmp/dhclient.$netif.dhcpopts ] && cp /tmp/dhclient.$netif.dhcpopts /tmp/net.$netif.dhcpopts
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@ -1,9 +1,9 @@
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if [ "$root" = "dhcp" ]; then
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if [ "$netroot" = "dhcp" ]; then
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if [ -n "$new_root_path" -a -z "${new_root_path%%nbd:*}" ]; then
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root="$new_root_path"
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netroot="$new_root_path"
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fi
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fi
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if [ -z "${root%nbd:*}" ]; then
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if [ -z "${netroot%nbd:*}" ]; then
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handler=/sbin/nbdroot
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fi
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@ -39,9 +39,13 @@ case "$root" in
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;;
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esac
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if [ "${root%%:*}" = "nbd" ]; then
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if [ -z "$netroot" -a -n "$root" -a -z "${root%%nbd:*}" ]; then
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netroot="$root"
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unset root
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fi
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if [ "${netroot%%:*}" = "nbd" ]; then
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# XXX validate options here?
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# XXX generate udev rules?
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rootok=1
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netroot=nbd
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fi
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@ -3,47 +3,47 @@
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# that the number of colons match what we expect, and our glob didn't
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# inadvertently match a different handler's.
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#
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if [ "$root" = "dhcp" -o "$root" = "nfs" -o "$root" = "nfs4" ]; then
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if [ "$netroot" = "dhcp" -o "$netroot" = "nfs" -o "$netroot" = "nfs4" ]; then
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nfsver=nfs
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if [ "$root" = "nfs4" ]; then
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if [ "$netroot" = "nfs4" ]; then
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nfsver=nfs4
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fi
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case "$new_root_path" in
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nfs:*|nfs4:*) root="$new_root_path" ;;
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nfs:*|nfs4:*) netroot="$new_root_path" ;;
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*:/*:*)
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if check_occurances "$new_root_path" ':' 2; then
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root="$nfsver:$new_root_path"
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netroot="$nfsver:$new_root_path"
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fi ;;
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*:/*,*)
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if check_occurances "$new_root_path" ':' 1; then
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root="$nfsver:$new_root_path"
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netroot="$nfsver:$new_root_path"
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fi ;;
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*:/*)
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if check_occurances "$new_root_path" ':' 1; then
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root="$nfsver:$new_root_path:"
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netroot="$nfsver:$new_root_path:"
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fi ;;
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/*:*)
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if check_occurances "$new_root_path" ':' 1; then
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root="$nfsver::$new_root_path"
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netroot="$nfsver::$new_root_path"
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fi ;;
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/*,*)
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if check_occurances "$new_root_path" ':' 0; then
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root="$nfsver::$new_root_path"
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netroot="$nfsver::$new_root_path"
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fi ;;
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/*)
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if check_occurances "$new_root_path" ':' 0; then
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root="$nfsver::$new_root_path:"
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netroot="$nfsver::$new_root_path:"
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fi ;;
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'') root="$nfsver:::" ;;
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'') netroot="$nfsver:::" ;;
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esac
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fi
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if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
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if [ -z "${netroot%%nfs:*}" -o -z "${netroot%%nfs4:*}" ]; then
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# Fill in missing information from DHCP
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nfsver=${root%%:*}; root=${root#*:}
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nfsserver=${root%%:*}; root=${root#*:}
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nfspath=${root%%:*}
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nfsflags=${root#*:}
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nfsver=${netroot%%:*}; netroot=${netroot#*:}
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nfsserver=${netroot%%:*}; netroot=${netroot#*:}
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nfspath=${netroot%%:*}
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nfsflags=${netroot#*:}
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# XXX where does dhclient stash the next-server option? Do we care?
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if [ -z "$nfsserver" -o "$nfsserver" = "$nfspath" ]; then
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@ -51,9 +51,9 @@ if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
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fi
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# Handle alternate syntax of path,options
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if [ "$nfsflags" = "$nfspath" -a "${root#*,}" != "$root" ]; then
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nfspath=${root%%,*}
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nfsflags=${root#*,}
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if [ "$nfsflags" = "$nfspath" -a "${netroot#*,}" != "$netroot" ]; then
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nfspath=${netroot%%,*}
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nfsflags=${netroot#*,}
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fi
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# Catch the case when no additional flags are set
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@ -62,6 +62,6 @@ if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
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fi
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# XXX validate we have all the required info?
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root="$nfsver:$nfsserver:$nfspath:$nfsflags"
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netroot="$nfsver:$nfsserver:$nfspath:$nfsflags"
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handler=/sbin/nfsroot
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fi
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@ -2,6 +2,7 @@
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#
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# Preferred format:
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# root=nfs[4]:[server:]path[:options]
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# netroot=nfs[4]:[server:]path[:options]
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#
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# If server is unspecified it will be pulled from one of the following
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# sources, in order:
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@ -38,9 +39,17 @@ case "$root" in
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;;
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esac
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case "$root" in
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if [ -z "$netroot" -a -n "$root" -a -z "${root%%nfs*}" ]; then
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netroot="$root"
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unset root
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fi
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case "$netroot" in
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nfs|nfs4|nfs:*|nfs4:*)
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rootok=1
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netroot=nfs
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if [ -n "$root" -a "$netroot" != "$root" ]; then
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echo "WARNING: root= and netroot= do not match, ignoring root="
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fi
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unset root
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;;
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esac
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@ -45,7 +45,7 @@ if [ -z "$rootok" -a -n "${root%%error:*}" ]; then
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root="error: No handler for root=${root}"
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fi
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if [ -z "${root%%error:*}" ]; then
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if [ -n "$root" -a -z "${root%%error:*}" ]; then
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case "${root%%:*}" in
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'') echo "FATAL: no root= option specified, and no network support" ;;
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error) echo "FATAL: ${root#error:}" ;;
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@ -100,7 +100,10 @@ test_nfsv3() {
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# MAC numbering scheme:
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# NFSv3: last octect starts at 0x00 and works up
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# NFSv4: last octect starts at 0x80 and works up
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client_test "NFSv3 netroot=dhcp DHCP path only" 52:54:00:12:34:00 \
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"netroot=dhcp" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv3 root=dhcp DHCP path only" 52:54:00:12:34:00 \
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"root=dhcp" 192.168.50.1 -wsize=4096 || return 1
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@ -110,6 +113,9 @@ test_nfsv3() {
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client_test "NFSv3 root=/dev/nfs DHCP path only" 52:54:00:12:34:00 \
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"root=/dev/nfs" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv3 netroot=dhcp DHCP IP:path" 52:54:00:12:34:01 \
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"netroot=dhcp" 192.168.50.2 -wsize=4096 || return 1
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client_test "NFSv3 root=dhcp DHCP IP:path" 52:54:00:12:34:01 \
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"root=dhcp" 192.168.50.2 -wsize=4096 || return 1
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@ -122,9 +128,16 @@ test_nfsv3() {
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client_test "NFSv3 root=dhcp DHCP proto:IP:path" 52:54:00:12:34:02 \
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"root=dhcp" 192.168.50.3 -wsize=4096 || return 1
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client_test "NFSv3 netroot=dhcp DHCP proto:IP:path:options" \
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52:54:00:12:34:03 "netroot=dhcp" 192.168.50.3 wsize=4096 || return 1
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client_test "NFSv3 root=dhcp DHCP proto:IP:path:options" 52:54:00:12:34:03 \
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"root=dhcp" 192.168.50.3 wsize=4096 || return 1
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client_test "NFSv3 netroot=nfs:..." 52:54:00:12:34:04 \
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"netroot=nfs:192.168.50.1:/nfs/client" 192.168.50.1 \
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-wsize=4096 || return 1
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client_test "NFSv3 root=nfs:..." 52:54:00:12:34:04 \
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"root=nfs:192.168.50.1:/nfs/client" 192.168.50.1 -wsize=4096 || return 1
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@ -168,24 +181,40 @@ test_nfsv4() {
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# server, so put these later in the list to avoid a pause when doing
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# switch_root
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client_test "NFSv4 netroot=nfs4 DHCP path only" 52:54:00:12:34:80 \
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"netroot=nfs4" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv4 root=nfs4 DHCP path only" 52:54:00:12:34:80 \
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"root=nfs4" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv4 root=/dev/nfs4 DHCP path only" 52:54:00:12:34:80 \
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"root=/dev/nfs4" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv4 netroot=nfs4 DHCP IP:path" 52:54:00:12:34:81 \
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"netroot=nfs4" 192.168.50.2 -wsize=4096 || return 1
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client_test "NFSv4 root=nfs4 DHCP IP:path" 52:54:00:12:34:81 \
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"root=nfs4" 192.168.50.2 -wsize=4096 || return 1
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client_test "NFSv4 root=/dev/nfs4 DHCP IP:path" 52:54:00:12:34:81 \
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"root=/dev/nfs4" 192.168.50.2 -wsize=4096 || return 1
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client_test "NFSv4 netroot=dhcp DHCP proto:IP:path" 52:54:00:12:34:82 \
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"netroot=dhcp" 192.168.50.3 -wsize=4096 || return 1
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client_test "NFSv4 root=dhcp DHCP proto:IP:path" 52:54:00:12:34:82 \
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"root=dhcp" 192.168.50.3 -wsize=4096 || return 1
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client_test "NFSv4 netroot=dhcp DHCP proto:IP:path:options" \
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52:54:00:12:34:83 "netroot=dhcp" 192.168.50.3 wsize=4096 || return 1
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client_test "NFSv4 root=dhcp DHCP proto:IP:path:options" 52:54:00:12:34:83 \
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"root=dhcp" 192.168.50.3 wsize=4096 || return 1
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client_test "NFSv4 netroot=nfs4:..." 52:54:00:12:34:84 \
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"netroot=nfs4:192.168.50.1:/client" 192.168.50.1 \
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-wsize=4096 || return 1
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client_test "NFSv4 root=nfs4:..." 52:54:00:12:34:84 \
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"root=nfs4:192.168.50.1:/client" 192.168.50.1 \
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-wsize=4096 || return 1
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@ -201,8 +230,12 @@ test_nfsv4() {
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52:54:00:12:34:84 "root=nfs4 nfsroot=/client,wsize=4096" \
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192.168.50.1 wsize=4096 || return 1
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# This one only works with NFSv4 in the test suite -- NFSv3 needs
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# These two only work with NFSv4 in the test suite -- NFSv3 needs
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# a /nfs prefix due to our server configuration
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client_test "NFSv4 netroot=nfs4" 52:54:00:12:34:84 \
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"netroot=nfs4" 192.168.50.1 -wsize=4096 || return 1
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client_test "NFSv4 root=nfs4" 52:54:00:12:34:84 \
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"root=nfs4" 192.168.50.1 -wsize=4096 || return 1
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@ -146,6 +146,14 @@ test_run() {
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client_test "NBD root=dhcp DHCP root-path nbd:srv:port:fstype:fsopts" \
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52:54:00:12:34:04 "root=dhcp" ext2 errors=panic || return 1
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# netroot handling
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client_test "NBD netroot=nbd:IP:port" 52:54:00:12:34:00 \
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"netroot=nbd:192.168.50.1:2000" || return 1
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client_test "NBD netroot=dhcp DHCP root-path nbd:srv:port:fstype:fsopts" \
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52:54:00:12:34:04 "netroot=dhcp" ext2 errors=panic || return 1
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}
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make_client_root() {
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