Accepting request 309239 from home:eeich:branches:Base:System

- Improve-btrfs-handling-on-os-probing-for-grub2.patch
  * Improve btrfs handling on os-probing for grub2 (bsc#892364)
- Replaces: os-prober-btrfsfix-trim-leading-subvol.patch

OBS-URL: https://build.opensuse.org/request/show/309239
OBS-URL: https://build.opensuse.org/package/show/Base:System/os-prober?expand=0&rev=53

Improve-btrfs-handling-on-os-probing-for-grub2.patch

@@ -0,0 +1,61 @@
+From: Egbert Eich <eich@suse.de>
+Date: Fri May 29 08:55:21 2015 +0200
+Subject: Improve btrfs handling on os-probing for grub2
+Patch-mainline: never
+
+References: bsc#892364
+Signed-off-by: Egbert Eich <eich@suse.com>
+
+Currently probing of a grub2 config file is broken if
+the root/boot fs is btrfs. This is due to a patch picked
+from Fedora which attempts to determine the location of
+the kernel and probe for it.
+This code has meanwhile changed on Fedora, however the
+new version works no better than the old one.
+It is possible that this code works under very special
+circumstances of the Fedora system, however it is by no
+means valid.
+Our goal is to
+a. determine the location of the kernel in the mounted fs
+   regardless whether the grub2 config specifies an absolute
+   or relative path to the kernel file.
+b. Prepend the correct prefix if grub2_btrfs expects an
+   absolute path (either because the current grub2 fs isn't
+   btrfs or absolute path addressing is explicitely requested).
+c. Attempt to handle the location of the kernel file correctly
+   if this lives on a separate btrfs subvolume.
+   (Currently this only works if the path to this subvolume is
+   identical to the fs path).
+
+Signed-off-by: Egbert Eich <eich@suse.de>
+---
+ linux-boot-probes/mounted/common/40grub2 | 16 +++++++++++++---
+ 1 file changed, 13 insertions(+), 3 deletions(-)
+
+diff --git a/linux-boot-probes/mounted/common/40grub2 b/linux-boot-probes/mounted/common/40grub2
+index b548585..ccdbebb 100755
+--- a/linux-boot-probes/mounted/common/40grub2
++++ b/linux-boot-probes/mounted/common/40grub2
+@@ -14,9 +14,19 @@ bootsv="$6"
+ found_item=0
+ 
+ entry_result () {
+-	if [ "x$type" = "xbtrfs" -a "$rootsv" = "$bootsv" ]; then
+-		# trim off the leading subvol
+-		kernelfile=$(echo "$kernel" | cut -d '/' -f 2- | cut -d '/' -f 2-)
++	if [ "x$type" = "xbtrfs" ]; then
++		bsv=${bootsv:+/}${bootsv}
++		# if path is not relative to subvolume make it relative
++		kernel=${kernel#${bsv}}
++		kernelfile=$kernel
++		initrd=${initrd#${bsv}}
++		if [ "x$GRUB_FS" != "xbtrfs" -o "x${SUSE_BTRFS_SNAPSHOT_BOOTING}" != "xtrue" ]; then
++		    # absolute path needed: prepend subvolume if $kernel isn't empty
++		    kernel=${kernel:+${bsv}}${kernel}
++		    initrd=${initrd:+${bsv}}${initrd}
++		fi
++		# assumed: rootsv != bootsv if rootsv isn't ancestor of bootsv
++		[ "$partition" != "$bootpart" -o "$rootsv" != "$bootsv" ] && kernelfile="/boot${kernelfile}"
+ 	else
+ 		kernelfile=$kernel
+ 	fi

os-prober.changes

@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Fri May 29 07:14:40 UTC 2015 - eich@suse.com
+
+- Improve-btrfs-handling-on-os-probing-for-grub2.patch
+  * Improve btrfs handling on os-probing for grub2 (bsc#892364)
+- Replaces: os-prober-btrfsfix-trim-leading-subvol.patch
+
 -------------------------------------------------------------------
 Wed May 13 15:45:30 UTC 2015 - mchang@suse.com
 

os-prober.spec

@@ -57,7 +57,7 @@ Patch15:        os-prober-call-dmraid-once.patch
 # PATCH-FIX-OPENSUSE: fix os-prober misinterprets Windows 8 to be Vista (bsc#910654)
 Patch16:        os-prober-grep-for-windows-bcd-file.patch
 # PATCH-FIX-SLE: fix os-prober fails to detect other SLES12 installation (bsc#892364)
-Patch17:        os-prober-btrfsfix-trim-leading-subvol.patch
+Patch17:        Improve-btrfs-handling-on-os-probing-for-grub2.patch
 Requires:       /bin/grep
 Requires:       /bin/sed
 Requires:       /sbin/modprobe