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[Qemu-devel] [PATCH 13/14] Add flag to indicate external users to block
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 13/14] Add flag to indicate external users to block device |
Date: |
Mon, 7 Feb 2011 13:40:29 +0100 |
From: Marcelo Tosatti <address@hidden>
Certain operations such as drive_del or resize cannot be performed
while external users (eg. block migration) reference the block device.
Add a flag to indicate that.
Signed-off-by: Marcelo Tosatti <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 11 +++++++++++
block.h | 2 ++
block_int.h | 1 +
3 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 998df1b..ee9edfc 100644
--- a/block.c
+++ b/block.c
@@ -2774,6 +2774,17 @@ int64_t bdrv_get_dirty_count(BlockDriverState *bs)
return bs->dirty_count;
}
+void bdrv_set_in_use(BlockDriverState *bs, int in_use)
+{
+ assert(bs->in_use != in_use);
+ bs->in_use = in_use;
+}
+
+int bdrv_in_use(BlockDriverState *bs)
+{
+ return bs->in_use;
+}
+
int bdrv_img_create(const char *filename, const char *fmt,
const char *base_filename, const char *base_fmt,
char *options, uint64_t img_size, int flags)
diff --git a/block.h b/block.h
index 239f729..19f4768 100644
--- a/block.h
+++ b/block.h
@@ -241,6 +241,8 @@ void bdrv_reset_dirty(BlockDriverState *bs, int64_t
cur_sector,
int nr_sectors);
int64_t bdrv_get_dirty_count(BlockDriverState *bs);
+void bdrv_set_in_use(BlockDriverState *bs, int in_use);
+int bdrv_in_use(BlockDriverState *bs);
typedef enum {
BLKDBG_L1_UPDATE,
diff --git a/block_int.h b/block_int.h
index 6ebdc3e..545ad11 100644
--- a/block_int.h
+++ b/block_int.h
@@ -199,6 +199,7 @@ struct BlockDriverState {
char device_name[32];
unsigned long *dirty_bitmap;
int64_t dirty_count;
+ int in_use; /* users other than guest access, eg. block migration */
QTAILQ_ENTRY(BlockDriverState) list;
void *private;
};
--
1.7.2.3
- [Qemu-devel] [PATCH 02/14] Documentation: add Sheepdog disk images, (continued)
- [Qemu-devel] [PATCH 02/14] Documentation: add Sheepdog disk images, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 03/14] block/vdi: Fix wrong size in conditionally used memset, memcmp, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 05/14] ahci: add license header in ahci.h, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 07/14] ahci: send init d2h fis on fis enable, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 04/14] ahci: split ICH9 from core, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 06/14] ahci: split ICH and AHCI even more, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 08/14] ahci: Implement HBA reset, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 09/14] ahci: make number of ports runtime determined, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 10/14] block-migration: actually disable dirty tracking on cleanup, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 11/14] blockdev: add refcount to DriveInfo, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 13/14] Add flag to indicate external users to block device,
Kevin Wolf <=
- [Qemu-devel] [PATCH 12/14] block-migration: add reference to target DriveInfo, Kevin Wolf, 2011/02/07
- [Qemu-devel] [PATCH 14/14] block: enable in_use flag, Kevin Wolf, 2011/02/07
- [Qemu-devel] Re: [PULL 00/14] Block patches for master, Anthony Liguori, 2011/02/07