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authorZhengui <lizhengui@huawei.com>2020-10-20 14:47:44 +0000
committerKevin Wolf <kwolf@redhat.com>2020-10-27 15:26:20 +0100
commit0c8c4895a6a54ffb7209402b183297c80c868873 (patch)
treefe1e22f729751fc7bf2c8f6e828c16cffe20d8c5 /qemu-img.c
parenta0441b66e811f24d92238e9a34f9d46b3a9058fa (diff)
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qemu-img: add support for rate limit in qemu-img convert
add support for rate limit in qemu-img convert. Signed-off-by: Zhengui <lizhengui@huawei.com> Message-Id: <1603205264-17424-3-git-send-email-lizhengui@huawei.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-img.c')
-rw-r--r--qemu-img.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/qemu-img.c b/qemu-img.c
index 3023abe..a968c74 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -50,6 +50,8 @@
#include "block/qapi.h"
#include "crypto/init.h"
#include "trace/control.h"
+#include "qemu/throttle.h"
+#include "block/throttle-groups.h"
#define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \
"\n" QEMU_COPYRIGHT "\n"
@@ -1669,6 +1671,7 @@ enum ImgConvertBlockStatus {
};
#define MAX_COROUTINES 16
+#define CONVERT_THROTTLE_GROUP "img_convert"
typedef struct ImgConvertState {
BlockBackend **src;
@@ -2184,6 +2187,17 @@ static int convert_copy_bitmaps(BlockDriverState *src, BlockDriverState *dst)
#define MAX_BUF_SECTORS 32768
+static void set_rate_limit(BlockBackend *blk, int64_t rate_limit)
+{
+ ThrottleConfig cfg;
+
+ throttle_config_init(&cfg);
+ cfg.buckets[THROTTLE_BPS_WRITE].avg = rate_limit;
+
+ blk_io_limits_enable(blk, CONVERT_THROTTLE_GROUP);
+ blk_set_io_limits(blk, &cfg);
+}
+
static int img_convert(int argc, char **argv)
{
int c, bs_i, flags, src_flags = 0;
@@ -2204,6 +2218,7 @@ static int img_convert(int argc, char **argv)
bool force_share = false;
bool explict_min_sparse = false;
bool bitmaps = false;
+ int64_t rate_limit = 0;
ImgConvertState s = (ImgConvertState) {
/* Need at least 4k of zeros for sparse detection */
@@ -2226,7 +2241,7 @@ static int img_convert(int argc, char **argv)
{"bitmaps", no_argument, 0, OPTION_BITMAPS},
{0, 0, 0, 0}
};
- c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WU",
+ c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WUr:",
long_options, NULL);
if (c == -1) {
break;
@@ -2323,6 +2338,12 @@ static int img_convert(int argc, char **argv)
case 'U':
force_share = true;
break;
+ case 'r':
+ rate_limit = cvtnum("rate limit", optarg);
+ if (rate_limit < 0) {
+ goto fail_getopt;
+ }
+ break;
case OPTION_OBJECT: {
QemuOpts *object_opts;
object_opts = qemu_opts_parse_noisily(&qemu_object_opts,
@@ -2712,6 +2733,10 @@ static int img_convert(int argc, char **argv)
s.cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
}
+ if (rate_limit) {
+ set_rate_limit(s.target, rate_limit);
+ }
+
ret = convert_do_copy(&s);
/* Now copy the bitmaps */