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network: add support for netroot=...

Browse Source 
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.
This commit is contained in:
David Dillow 2009-06-09 01:14:35 -04:00
parent a29f15a5b6
commit aec48753c2
9 changed files with 92 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
modules.d/40network/dhcp-fallback.sh
View File

@ -1,12 +1,18 @@
# We should go last, and default the root if needed
if [ -z "$root" ]; then
root=dhcp
if [ -z "$root" -a -z "$netroot" ]; then
netroot=dhcp
fi
if [ "$root" = "dhcp" -a -z "$netroot" ]; then
rootok=1
netroot=dhcp
unset root
fi
# Cleanup any coversions from root->netroot if they are the same
if [ "$netroot" = "$root" ]; then
unset root
fi
if [ "${netroot+set}" = "set" ]; then

2
modules.d/40network/netroot
View File

@ -46,7 +46,7 @@ fi
# Run the handler; don't store the root, it may change from device to device
# XXX other variables to export?
export NEWROOT
if $handler $netif $root; then
if $handler $netif $netroot; then
# Network rootfs mount successful
[ -f /tmp/dhclient.$netif.lease ] && cp /tmp/dhclient.$netif.lease /tmp/net.$netif.lease
[ -f /tmp/dhclient.$netif.dhcpopts ] && cp /tmp/dhclient.$netif.dhcpopts /tmp/net.$netif.dhcpopts

6
modules.d/95nbd/nbd-netroot.sh
View File

@ -1,9 +1,9 @@
if [ "$root" = "dhcp" ]; then
if [ "$netroot" = "dhcp" ]; then
if [ -n "$new_root_path" -a -z "${new_root_path%%nbd:*}" ]; then
root="$new_root_path"
netroot="$new_root_path"
fi
fi
if [ -z "${root%nbd:*}" ]; then
if [ -z "${netroot%nbd:*}" ]; then
handler=/sbin/nbdroot
fi

8
modules.d/95nbd/parse-nbdroot.sh
View File

@ -39,9 +39,13 @@ case "$root" in
;;
esac
if [ "${root%%:*}" = "nbd" ]; then
if [ -z "$netroot" -a -n "$root" -a -z "${root%%nbd:*}" ]; then
netroot="$root"
unset root
fi
if [ "${netroot%%:*}" = "nbd" ]; then
# XXX validate options here?
# XXX generate udev rules?
rootok=1
netroot=nbd
fi

38
modules.d/95nfs/nfs-netroot.sh
View File

@ -3,47 +3,47 @@
# that the number of colons match what we expect, and our glob didn't
# inadvertently match a different handler's.
#
if [ "$root" = "dhcp" -o "$root" = "nfs" -o "$root" = "nfs4" ]; then
if [ "$netroot" = "dhcp" -o "$netroot" = "nfs" -o "$netroot" = "nfs4" ]; then
nfsver=nfs
if [ "$root" = "nfs4" ]; then
if [ "$netroot" = "nfs4" ]; then
nfsver=nfs4
fi
case "$new_root_path" in
nfs:*|nfs4:*) root="$new_root_path" ;;
nfs:*|nfs4:*) netroot="$new_root_path" ;;
*:/*:*)
if check_occurances "$new_root_path" ':' 2; then
root="$nfsver:$new_root_path"
netroot="$nfsver:$new_root_path"
fi ;;
*:/*,*)
if check_occurances "$new_root_path" ':' 1; then
root="$nfsver:$new_root_path"
netroot="$nfsver:$new_root_path"
fi ;;
*:/*)
if check_occurances "$new_root_path" ':' 1; then
root="$nfsver:$new_root_path:"
netroot="$nfsver:$new_root_path:"
fi ;;
/*:*)
if check_occurances "$new_root_path" ':' 1; then
root="$nfsver::$new_root_path"
netroot="$nfsver::$new_root_path"
fi ;;
/*,*)
if check_occurances "$new_root_path" ':' 0; then
root="$nfsver::$new_root_path"
netroot="$nfsver::$new_root_path"
fi ;;
/*)
if check_occurances "$new_root_path" ':' 0; then
root="$nfsver::$new_root_path:"
netroot="$nfsver::$new_root_path:"
fi ;;
'') root="$nfsver:::" ;;
'') netroot="$nfsver:::" ;;
esac
fi
if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
if [ -z "${netroot%%nfs:*}" -o -z "${netroot%%nfs4:*}" ]; then
# Fill in missing information from DHCP
nfsver=${root%%:*}; root=${root#*:}
nfsserver=${root%%:*}; root=${root#*:}
nfspath=${root%%:*}
nfsflags=${root#*:}
nfsver=${netroot%%:*}; netroot=${netroot#*:}
nfsserver=${netroot%%:*}; netroot=${netroot#*:}
nfspath=${netroot%%:*}
nfsflags=${netroot#*:}
# XXX where does dhclient stash the next-server option? Do we care?
if [ -z "$nfsserver" -o "$nfsserver" = "$nfspath" ]; then
@ -51,9 +51,9 @@ if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
fi
# Handle alternate syntax of path,options
if [ "$nfsflags" = "$nfspath" -a "${root#*,}" != "$root" ]; then
nfspath=${root%%,*}
nfsflags=${root#*,}
if [ "$nfsflags" = "$nfspath" -a "${netroot#*,}" != "$netroot" ]; then
nfspath=${netroot%%,*}
nfsflags=${netroot#*,}
fi
# Catch the case when no additional flags are set
@ -62,6 +62,6 @@ if [ -z "${root%%nfs:*}" -o -z "${root%%nfs4:*}" ]; then
fi
# XXX validate we have all the required info?
root="$nfsver:$nfsserver:$nfspath:$nfsflags"
netroot="$nfsver:$nfsserver:$nfspath:$nfsflags"
handler=/sbin/nfsroot
fi

13
modules.d/95nfs/parse-nfsroot.sh
View File

@ -2,6 +2,7 @@
#
# Preferred format:
# root=nfs[4]:[server:]path[:options]
# netroot=nfs[4]:[server:]path[:options]
#
# If server is unspecified it will be pulled from one of the following
# sources, in order:
@ -38,9 +39,17 @@ case "$root" in
;;
esac
case "$root" in
if [ -z "$netroot" -a -n "$root" -a -z "${root%%nfs*}" ]; then
netroot="$root"
unset root
fi
case "$netroot" in
nfs|nfs4|nfs:*|nfs4:*)
rootok=1
netroot=nfs
if [ -n "$root" -a "$netroot" != "$root" ]; then
echo "WARNING: root= and netroot= do not match, ignoring root="
fi
unset root
;;
esac

2
modules.d/99base/init
View File

@ -45,7 +45,7 @@ if [ -z "$rootok" -a -n "${root%%error:*}" ]; then
root="error: No handler for root=${root}"
fi
if [ -z "${root%%error:*}" ]; then
if [ -n "$root" -a -z "${root%%error:*}" ]; then
case "${root%%:*}" in
'') echo "FATAL: no root= option specified, and no network support" ;;
error) echo "FATAL: ${root#error:}" ;;

37
test/TEST-20-NFS/test.sh
View File

@ -100,7 +100,10 @@ test_nfsv3() {
# MAC numbering scheme:
# NFSv3: last octect starts at 0x00 and works up
# NFSv4: last octect starts at 0x80 and works up
client_test "NFSv3 netroot=dhcp DHCP path only" 52:54:00:12:34:00 \
"netroot=dhcp" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv3 root=dhcp DHCP path only" 52:54:00:12:34:00 \
"root=dhcp" 192.168.50.1 -wsize=4096 || return 1
@ -110,6 +113,9 @@ test_nfsv3() {
client_test "NFSv3 root=/dev/nfs DHCP path only" 52:54:00:12:34:00 \
"root=/dev/nfs" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv3 netroot=dhcp DHCP IP:path" 52:54:00:12:34:01 \
"netroot=dhcp" 192.168.50.2 -wsize=4096 || return 1
client_test "NFSv3 root=dhcp DHCP IP:path" 52:54:00:12:34:01 \
"root=dhcp" 192.168.50.2 -wsize=4096 || return 1
@ -122,9 +128,16 @@ test_nfsv3() {
client_test "NFSv3 root=dhcp DHCP proto:IP:path" 52:54:00:12:34:02 \
"root=dhcp" 192.168.50.3 -wsize=4096 || return 1
client_test "NFSv3 netroot=dhcp DHCP proto:IP:path:options" \
52:54:00:12:34:03 "netroot=dhcp" 192.168.50.3 wsize=4096 || return 1
client_test "NFSv3 root=dhcp DHCP proto:IP:path:options" 52:54:00:12:34:03 \
"root=dhcp" 192.168.50.3 wsize=4096 || return 1
client_test "NFSv3 netroot=nfs:..." 52:54:00:12:34:04 \
"netroot=nfs:192.168.50.1:/nfs/client" 192.168.50.1 \
-wsize=4096 || return 1
client_test "NFSv3 root=nfs:..." 52:54:00:12:34:04 \
"root=nfs:192.168.50.1:/nfs/client" 192.168.50.1 -wsize=4096 || return 1
@ -168,24 +181,40 @@ test_nfsv4() {
# server, so put these later in the list to avoid a pause when doing
# switch_root
client_test "NFSv4 netroot=nfs4 DHCP path only" 52:54:00:12:34:80 \
"netroot=nfs4" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv4 root=nfs4 DHCP path only" 52:54:00:12:34:80 \
"root=nfs4" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv4 root=/dev/nfs4 DHCP path only" 52:54:00:12:34:80 \
"root=/dev/nfs4" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv4 netroot=nfs4 DHCP IP:path" 52:54:00:12:34:81 \
"netroot=nfs4" 192.168.50.2 -wsize=4096 || return 1
client_test "NFSv4 root=nfs4 DHCP IP:path" 52:54:00:12:34:81 \
"root=nfs4" 192.168.50.2 -wsize=4096 || return 1
client_test "NFSv4 root=/dev/nfs4 DHCP IP:path" 52:54:00:12:34:81 \
"root=/dev/nfs4" 192.168.50.2 -wsize=4096 || return 1
client_test "NFSv4 netroot=dhcp DHCP proto:IP:path" 52:54:00:12:34:82 \
"netroot=dhcp" 192.168.50.3 -wsize=4096 || return 1
client_test "NFSv4 root=dhcp DHCP proto:IP:path" 52:54:00:12:34:82 \
"root=dhcp" 192.168.50.3 -wsize=4096 || return 1
client_test "NFSv4 netroot=dhcp DHCP proto:IP:path:options" \
52:54:00:12:34:83 "netroot=dhcp" 192.168.50.3 wsize=4096 || return 1
client_test "NFSv4 root=dhcp DHCP proto:IP:path:options" 52:54:00:12:34:83 \
"root=dhcp" 192.168.50.3 wsize=4096 || return 1
client_test "NFSv4 netroot=nfs4:..." 52:54:00:12:34:84 \
"netroot=nfs4:192.168.50.1:/client" 192.168.50.1 \
-wsize=4096 || return 1
client_test "NFSv4 root=nfs4:..." 52:54:00:12:34:84 \
"root=nfs4:192.168.50.1:/client" 192.168.50.1 \
-wsize=4096 || return 1
@ -201,8 +230,12 @@ test_nfsv4() {
52:54:00:12:34:84 "root=nfs4 nfsroot=/client,wsize=4096" \
192.168.50.1 wsize=4096 || return 1
# This one only works with NFSv4 in the test suite -- NFSv3 needs
# These two only work with NFSv4 in the test suite -- NFSv3 needs
# a /nfs prefix due to our server configuration
client_test "NFSv4 netroot=nfs4" 52:54:00:12:34:84 \
"netroot=nfs4" 192.168.50.1 -wsize=4096 || return 1
client_test "NFSv4 root=nfs4" 52:54:00:12:34:84 \
"root=nfs4" 192.168.50.1 -wsize=4096 || return 1

8
test/TEST-40-NBD/test.sh
View File

@ -146,6 +146,14 @@ test_run() {
client_test "NBD root=dhcp DHCP root-path nbd:srv:port:fstype:fsopts" \
52:54:00:12:34:04 "root=dhcp" ext2 errors=panic || return 1
# netroot handling
client_test "NBD netroot=nbd:IP:port" 52:54:00:12:34:00 \
"netroot=nbd:192.168.50.1:2000" || return 1
client_test "NBD netroot=dhcp DHCP root-path nbd:srv:port:fstype:fsopts" \
52:54:00:12:34:04 "netroot=dhcp" ext2 errors=panic || return 1
}
make_client_root() {