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block: add bdrv_get_device_or_node_name()

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This function gets the device name associated with a BlockDriverState,
or its node name if the device name is empty.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 4fa30aa8d61d9052ce266fd5429a59a14e941255.1428485266.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2015-04-08 12:29:18 +03:00 committed by Kevin Wolf
parent ec683d6040
commit 9b2aa84f87
3 changed files with 11 additions and 4 deletions
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9
block.c
View File

@ -3980,6 +3980,15 @@ const char *bdrv_get_device_name(const BlockDriverState *bs)
return bs->blk ? blk_name(bs->blk) : "";
}
/* This can be used to identify nodes that might not have a device
* name associated. Since node and device names live in the same
* namespace, the result is unambiguous. The exception is if both are
* absent, then this returns an empty (non-null) string. */
const char *bdrv_get_device_or_node_name(const BlockDriverState *bs)
{
return bs->blk ? blk_name(bs->blk) : bs->node_name;
}
int bdrv_get_flags(BlockDriverState *bs)
{
return bs->open_flags;

5
block/quorum.c
View File

@ -226,10 +226,7 @@ static void quorum_report_bad(QuorumAIOCB *acb, char *node_name, int ret)
static void quorum_report_failure(QuorumAIOCB *acb)
{
const char *reference = bdrv_get_device_name(acb->common.bs)[0] ?
bdrv_get_device_name(acb->common.bs) :
acb->common.bs->node_name;
const char *reference = bdrv_get_device_or_node_name(acb->common.bs);
qapi_event_send_quorum_failure(reference, acb->sector_num,
acb->nb_sectors, &error_abort);
}

1
include/block/block.h
View File

@ -398,6 +398,7 @@ void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
void *opaque);
const char *bdrv_get_node_name(const BlockDriverState *bs);
const char *bdrv_get_device_name(const BlockDriverState *bs);
const char *bdrv_get_device_or_node_name(const BlockDriverState *bs);
int bdrv_get_flags(BlockDriverState *bs);
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);