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authorGuilhem Moulin <guilhem@fripost.org>2014-01-23 07:40:58 +0100
committerGuilhem Moulin <guilhem@fripost.org>2015-06-07 04:27:58 +0200
commit16e2c85922848adb1c21a46a6cc23846ef94b951 (patch)
tree740413af17c446acf4478ed7e176caa881bdcf9e /src/fripost-partman-udeb
parentba40cbca9650e1ddaa8357c21b5de31cc376c481 (diff)
Enable RAID root system.
Quoting /usr/share/doc/cryptsetup/README.keyctl : The current state for dm-crypt in Linux is that it is single threaded, thus every dm-crypt mapping only uses a single core for crypto operations. To use the full power of your many-core processor it is thus necessary to split the dm-crypt device. For Linux software raid arrays the easiest segmentation is to just put the dm-crypt layer below the software raid layer. However, this seems no longer true since 2.6.38, cf. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=714806 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c029772125594e31eb1a5ad9e0913724ed9891f2 http://kernelnewbies.org/Linux_2_6_38#head-49f5f735853f8cc7c4d89e5c266fe07316b49f4c Therefore encrypting the array (instead of assembling an array of encrypted disks) shouldn't cause a performance cost. Also, it makes the ramdisk much easier to configure :-)
Diffstat (limited to 'src/fripost-partman-udeb')
-rw-r--r--src/fripost-partman-udeb/base.sh16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/fripost-partman-udeb/base.sh b/src/fripost-partman-udeb/base.sh
index b6770f8..976cfb6 100644
--- a/src/fripost-partman-udeb/base.sh
+++ b/src/fripost-partman-udeb/base.sh
@@ -586,3 +586,19 @@ getIPv4() {
$ip -4 address show dev "$if" scope global \
| sed -nr '/^\s+inet\s([[:xdigit:].:]{3,39}).*/ {s//\1/p;q}'
}
+
+
+
+##############################################################################
+# Remove a partition from a device
+#
+# Usage: fripost_rmpart device partition
+
+fripost_rmpart () {
+ local device="$1" part="$2"
+ n=$( /sbin/parted -sm "$device" p
+ | sed -nr "/^[0-9].*:$part:[^:]*;$/ s/:.*//p" )
+ [ "$n" ] || return
+ log "Removing partition $n ($part) from $device"
+ /sbin/parted -sm "$device" rm "$n"
+}