From 44d631a001edf558d81f4d49c99c5496a949ff3a Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Wed, 26 Jan 2011 12:12:34 -0200 Subject: Add flag to indicate external users to block device 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 Signed-off-by: Kevin Wolf (cherry picked from commit db593f2565dc12442d6bac9e8eaefa027dfcada9) --- block.c | 11 +++++++++++ block.h | 2 ++ block_int.h | 1 + 3 files changed, 14 insertions(+) diff --git a/block.c b/block.c index 998df1b54b..ee9edfce2c 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 239f729580..19f4768873 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 6ebdc3eea2..545ad11ff3 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; }; -- cgit v1.2.1