- udev: use device mapper target name for btrfs device ready (bnc#888215).

- Add udev-use-device-mapper-target-name-for-btrfs-device-ready.patch

- udev: use device mapper target name for btrfs device ready (bnc#888215).
- Add udev-use-device-mapper-target-name-for-btrfs-device-ready.patch

OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=743

systemd-mini.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Jul 30 21:10:32 UTC 2014 - jeffm@suse.com
+
+- udev: use device mapper target name for btrfs device ready (bnc#888215).
+- Add udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
+
 -------------------------------------------------------------------
 Wed Jul 30 12:53:07 UTC 2014 - werner@suse.de
 

systemd-mini.spec

@@ -884,6 +884,8 @@ Patch1057:      1057-udev-unify-event-timeout-handling.patch
 Patch1058:      1058-udev-unify-event-timeout-handling.patch
 # PATCH-FIX-UPSTREAM 1059-udev-fixup-commit-dd5eddd28a74a49607a8fffcaf960040db.patch
 Patch1059:      1059-udev-fixup-commit-dd5eddd28a74a49607a8fffcaf960040db.patch
+# PATCH-FIX-SUSE udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
+Patch1060:      udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
 
 %description
 Systemd is a system and service manager, compatible with SysV and LSB
@@ -1491,6 +1493,7 @@ cp %{SOURCE7} m4/
 %patch1058 -p0
 %endif
 %patch1059 -p0
+%patch1060 -p1
 
 # ensure generate files are removed
 rm -f units/emergency.service

systemd.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Jul 30 21:10:21 UTC 2014 - jeffm@suse.com
+
+- udev: use device mapper target name for btrfs device ready (bnc#888215).
+- Add udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
+
 -------------------------------------------------------------------
 Wed Jul 30 12:53:07 UTC 2014 - werner@suse.de
 

systemd.spec

@@ -879,6 +879,8 @@ Patch1057:      1057-udev-unify-event-timeout-handling.patch
 Patch1058:      1058-udev-unify-event-timeout-handling.patch
 # PATCH-FIX-UPSTREAM 1059-udev-fixup-commit-dd5eddd28a74a49607a8fffcaf960040db.patch
 Patch1059:      1059-udev-fixup-commit-dd5eddd28a74a49607a8fffcaf960040db.patch
+# PATCH-FIX-SUSE udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
+Patch1060:      udev-use-device-mapper-target-name-for-btrfs-device-ready.patch
 
 %description
 Systemd is a system and service manager, compatible with SysV and LSB
@@ -1486,6 +1488,7 @@ cp %{SOURCE7} m4/
 %patch1058 -p0
 %endif
 %patch1059 -p0
+%patch1060 -p1
 
 # ensure generate files are removed
 rm -f units/emergency.service

udev-use-device-mapper-target-name-for-btrfs-device-ready.patch

@@ -0,0 +1,43 @@
+From: Jeff Mahoney <jeffm@suse.com>
+Subject: udev: use device mapper target name for btrfs device ready
+References: bnc#888215
+
+When udev gets a change event for a block device, it calls the builtin
+btrfs helper to scan it for a btrfs file system. If the file system was
+mounted using a device mapper node, mount(8) will have looked up the
+device mapper table and used the /dev/mapper/<name> node for mount.
+
+If something like partprobe runs, and then causes change events to be
+handled, the btrfs ready event is handled using /dev/dm-N instead of
+the device mapper named node. Btrfs caches the last name passed to
+the scanning ioctl and uses that to report the device name for
+things like /proc/mounts.
+
+So, after running partprobe we go from:
+/dev/mapper/test-test on /mnt type btrfs (rw,relatime,space_cache)
+... to ...
+/dev/dm-0 on /mnt type btrfs (rw,relatime,space_cache)
+
+This doesn't apply only to LVM device, but multipath as well.
+
+If the device is a DM device, udev will have already cached the table name
+from sysfs and we can use that to pass /dev/mapper/<name> to the builtin
+so that the correct name is used.
+
+Signed-off-by: Jeff Mahoney <jeffm@suse.com>
+---
+ rules/64-btrfs.rules |    3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/rules/64-btrfs.rules
++++ b/rules/64-btrfs.rules
+@@ -6,7 +6,8 @@ ENV{ID_FS_TYPE}!="btrfs", GOTO="btrfs_en
+ ENV{SYSTEMD_READY}=="0", GOTO="btrfs_end"
+ 
+ # let the kernel know about this btrfs filesystem, and check if it is complete
+-IMPORT{builtin}="btrfs ready $devnode"
++ENV{DM_NAME}=="", IMPORT{builtin}="btrfs ready $devnode"
++ENV{DM_NAME}=="?*", IMPORT{builtin}="btrfs ready /dev/mapper/$env{DM_NAME}"
+ 
+ # mark the device as not ready to be used by the system
+ ENV{ID_BTRFS_READY}=="0", ENV{SYSTEMD_READY}="0"