spl/debian: add packaging files

based on Debian's packaging work, but simplified: - no DKMS and remove old patches which were based on top of Debian's packaging. Reviewed-by: Stoiko Ivanov <s.ivanov@proxmox.com> Tested-by: Stoiko Ivanov <s.ivanov@proxmox.com> Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
2019-02-05 16:55:32 +01:00
parent 28f635be8c
commit dee2ef0e31
18 changed files with 704 additions and 328 deletions
@@ -0,0 +1,49 @@
+#!/bin/sh
+set -e
+# The hostname and hostid of the last system to access a ZFS pool are stored in
+# the ZFS pool itself.  A pool is foreign if, during `zpool import`, the
+# current hostname and hostid are different than the stored values thereof.
+#
+# The hostid on Solaris is intrinsic, but is not on Linux (see #595790), so the
+# spl kernel module invokes /usr/bin/hostid from the userland in its initialization
+# routine.
+#
+# /usr/bin/hostid will return the 4 first bytes of the file /etc/hostid.
+# If this file is not present or contains less than 4 bytes, then /usr/bin/hostid
+# will return the bytes of the IP address of $(hostname) flipped, or zero if
+# such IP couldn't be obtained
+#
+# This means that things like a DHCP lease change can affect the hostid.
+#
+# Therefore the only way of having a stable hostid is to define it on /etc/hostid.
+# This postinst helper will check if we already have the hostid stabilized by
+# checking the existence of the file /etc/hostid to be 4 bytes at least.
+# If this file don't already exists on our system or has less than 4 bytes, then
+# we will stabilize our current hostid by writing its value to /etc/hostid
+
+# Detect if /etc/hostid is a conffile of previous spl package, migrate if yes
+# hostid file should preserve even when package is purged
+if $(dpkg-query --showformat='${Conffiles}\n' --show spl >/dev/null 2>&1); then
+	dpkg-maintscript-helper rm_conffile /etc/hostid -- "$@"
+fi
+
+if [ ! -f /etc/hostid ] || [ $(stat -c %s /etc/hostid) -lt 4 ] ; then
+
+	# Write our current hostid to /etc/hostid
+	HOSTID=$(hostid)
+	AA=$(echo $HOSTID | cut -b 1,2)
+	BB=$(echo $HOSTID | cut -b 3,4)
+	CC=$(echo $HOSTID | cut -b 5,6)
+	DD=$(echo $HOSTID | cut -b 7,8)
+
+	# Big Endian
+	if [ $(echo -n I | od -to2 | awk 'FNR==1{ print substr($2,6,1)}' 2>/dev/null) = 0 ]; then
+		# Invoke the printf from coreutils. shell builtin lacks the byte format.
+		/usr/bin/printf "\x$AA\x$BB\x$CC\x$DD" >/etc/hostid
+	else
+	# Little Endian
+		/usr/bin/printf "\x$DD\x$CC\x$BB\x$AA" >/etc/hostid
+	fi
+fi
+
+#DEBHELPER#