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authorlirans@il.ibm.com <lirans@il.ibm.com>2009-11-02 15:40:41 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2009-11-17 08:03:31 -0600
commit7cd1e32a860895ccca89eb90a0226efbcd969b55 (patch)
tree3b2c8712ea67b77d1a7a4b86a532744f9daa2aac /block_int.h
parentchar: rename qemu_chr_reset to qemu_chr_generic_open (diff)
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Expose a mechanism to trace block writes
To support live migration without shared storage we need to be able to trace writes to disk while migrating. This Patch expose dirty block tracking per device to be polled from upper layer. Changes from v4: - Register dirty tracking for each block device. - Minor coding style issues. - Block.c will now manage a dirty bitmap per device once bdrv_set_dirty_tracking() is called. Bitmap is polled by the upper layer (block-migration.c). Signed-off-by: Liran Schour <lirans@il.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'block_int.h')
-rw-r--r--block_int.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h
index 8e72abee0..7ebe926f5 100644
--- a/block_int.h
+++ b/block_int.h
@@ -168,6 +168,8 @@ struct BlockDriverState {
int cyls, heads, secs, translation;
int type;
char device_name[32];
+ int dirty_tracking;
+ uint8_t *dirty_bitmap;
BlockDriverState *next;
void *private;
};