Jeff Cody a375e0b03e block: set device_list.tqe_prev to NULL on BDS removal ... This fixes a regression introduced with commit 3f09bfbc7. Multiple bugs arise in conjunction with live snapshots and mirroring operations (which include active layer commit). After a live snapshot occurs, the active layer and the base layer both have a non-NULL tqe_prev field in the device_list, although the base node's tqe_prev field points to a NULL entry. This non-NULL tqe_prev field occurs after the bdrv_append() in the external snapshot calls change_parent_backing_link(). In change_parent_backing_link(), when the previous active layer is removed from device_list, the device_list.tqe_prev pointer is not set to NULL. The operating scheme in the block layer is to indicate that a BDS belongs in the bdrv_states device_list iff the device_list.tqe_prev pointer is non-NULL. This patch does two things: 1.) Introduces a new block layer helper bdrv_device_remove() to remove a BDS from the device_list, and 2.) uses that new API, which also fixes the regression once used in change_parent_backing_link(). Signed-off-by: Jeff Cody <jcody@redhat.com> Message-id: 0cd51e11c0666c04ddb7c05293fe94afeb551e89.1454376655.git.jcody@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> (cherry picked from commit f8aa905a4f) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>		2016-03-17 16:51:48 -05:00
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block	block: set device_list.tqe_prev to NULL on BDS removal	2016-03-17 16:51:48 -05:00
crypto	…
disas	…
exec	translate-all: ensure host page mask is always extended with 1's	2015-12-02 13:12:30 +01:00
fpu	…
hw	sdhci: Sanitize "sdhci-pci" properties for future qomification	2015-12-07 17:13:10 +00:00
libdecnumber	…
migration	Postcopy: Mark nohugepage before discard	2015-11-10 15:00:28 +01:00
monitor	monitor/target-ppc: Define target_get_monitor_def	2015-11-12 14:53:36 +11:00
net	vhost user: add rarp sending after live migration for legacy guest	2015-10-22 14:34:49 +03:00
qapi	qjson: surprise, allocating 6 QObjects per token is expensive	2015-11-26 10:07:07 +01:00
qemu	typedefs: Put them back into alphabetical order	2015-12-04 09:39:55 +03:00
qom	qom: Update documentation comment of struct Object	2015-12-03 20:10:22 +01:00
standard-headers	…
sysemu	oslib-win32: Change return type of function getpagesize	2015-11-30 06:47:02 +01:00
ui	replay: recording of the user input	2015-11-06 10:16:03 +01:00
config.h	…
elf.h	…
glib-compat.h	glib: add compatibility interface for g_hash_table_add()	2015-10-30 09:01:03 +01:00
qemu-common.h	Move page_size_init earlier	2015-11-10 14:51:48 +01:00
qemu-io.h	…
qjson.h	…
trace-tcg.h	…
trace.h	…