diff options
| author | Wen Congyang <wency@cn.fujitsu.com> | 2015-05-15 15:51:36 +0800 |
|---|---|---|
| committer | Jeff Cody <jcody@redhat.com> | 2015-07-14 21:50:13 -0400 |
| commit | 48ac0a4df84662f23da25262443e1810b70c2228 (patch) | |
| tree | 16ae278a96c3b019ab94d0b7b0889043a718d649 /block | |
| parent | 17d9716d7b5381c4b6566bb1a06267d2bfcd1821 (diff) | |
| download | qemu-48ac0a4df84662f23da25262443e1810b70c2228.zip | |
mirror: correct buf_size
If bus_size is less than 0, the command fails.
If buf_size is 0, use DEFAULT_MIRROR_BUF_SIZE.
If buf_size % granularity is not 0, mirror_free_init() will
do dangerous things.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 5555A588.3080907@cn.fujitsu.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/mirror.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/mirror.c b/block/mirror.c index a2700ca154..323f747c75 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -20,6 +20,7 @@ #define SLICE_TIME 100000000ULL /* ns */ #define MAX_IN_FLIGHT 16 +#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) /* The mirroring buffer is a list of granularity-sized chunks. * Free chunks are organized in a list. @@ -701,6 +702,14 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target, return; } + if (buf_size < 0) { + error_setg(errp, "Invalid parameter 'buf-size'"); + return; + } + + if (buf_size == 0) { + buf_size = DEFAULT_MIRROR_BUF_SIZE; + } s = block_job_create(driver, bs, speed, cb, opaque, errp); if (!s) { @@ -714,7 +723,7 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target, s->is_none_mode = is_none_mode; s->base = base; s->granularity = granularity; - s->buf_size = MAX(buf_size, granularity); + s->buf_size = ROUND_UP(buf_size, granularity); s->unmap = unmap; s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp); |