[Qemu-devel] [PATCH] block: Use BDRV_REQUEST_MAX_BYTES instead of BDRV_REQUEST_MAX_SECTORS

Alberto Garcia posted 1 patch 1 week ago
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git fetch https://github.com/patchew-project/qemu tags/patchew/20190514135735.14497-1-berto@igalia.com
Maintainers: Max Reitz <mreitz@redhat.com>, Kevin Wolf <kwolf@redhat.com>, Fam Zheng <fam@euphon.net>, Stefan Hajnoczi <stefanha@redhat.com>
block/io.c     | 6 +++---
qemu-io-cmds.c | 7 +++----
2 files changed, 6 insertions(+), 7 deletions(-)

[Qemu-devel] [PATCH] block: Use BDRV_REQUEST_MAX_BYTES instead of BDRV_REQUEST_MAX_SECTORS

Posted by Alberto Garcia 1 week ago
There are a few places in which we turn a number of bytes into sectors
in order to compare the result against BDRV_REQUEST_MAX_SECTORS
instead of using BDRV_REQUEST_MAX_BYTES directly.

Signed-off-by: Alberto Garcia <berto@igalia.com>
---
 block/io.c     | 6 +++---
 qemu-io-cmds.c | 7 +++----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/block/io.c b/block/io.c
index aeebc9c23c..3134a60a48 100644
--- a/block/io.c
+++ b/block/io.c
@@ -769,7 +769,7 @@ static bool coroutine_fn wait_serialising_requests(BdrvTrackedRequest *self)
 static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset,
                                    size_t size)
 {
-    if (size > BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS) {
+    if (size > BDRV_REQUEST_MAX_BYTES) {
         return -EIO;
     }
 
@@ -1017,7 +1017,7 @@ static int coroutine_fn bdrv_driver_preadv(BlockDriverState *bs,
 
     assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
     assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes >> BDRV_SECTOR_BITS) <= BDRV_REQUEST_MAX_SECTORS);
+    assert(bytes <= BDRV_REQUEST_MAX_BYTES);
     assert(drv->bdrv_co_readv);
 
     return drv->bdrv_co_readv(bs, sector_num, nb_sectors, qiov);
@@ -1070,7 +1070,7 @@ static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs,
 
     assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
     assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes >> BDRV_SECTOR_BITS) <= BDRV_REQUEST_MAX_SECTORS);
+    assert(bytes <= BDRV_REQUEST_MAX_BYTES);
 
     assert(drv->bdrv_co_writev);
     ret = drv->bdrv_co_writev(bs, sector_num, nb_sectors, qiov,
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index 8826bebaf6..30a7d9a13b 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -538,7 +538,7 @@ static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
 {
     int ret;
 
-    if (bytes >> 9 > BDRV_REQUEST_MAX_SECTORS) {
+    if (bytes > BDRV_REQUEST_MAX_BYTES) {
         return -ERANGE;
     }
 
@@ -1781,10 +1781,9 @@ static int discard_f(BlockBackend *blk, int argc, char **argv)
     if (bytes < 0) {
         print_cvtnum_err(bytes, argv[optind]);
         return bytes;
-    } else if (bytes >> BDRV_SECTOR_BITS > BDRV_REQUEST_MAX_SECTORS) {
+    } else if (bytes > BDRV_REQUEST_MAX_BYTES) {
         printf("length cannot exceed %"PRIu64", given %s\n",
-               (uint64_t)BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS,
-               argv[optind]);
+               (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
         return -EINVAL;
     }
 
-- 
2.11.0


Re: [Qemu-devel] [PATCH] block: Use BDRV_REQUEST_MAX_BYTES instead of BDRV_REQUEST_MAX_SECTORS

Posted by Kevin Wolf 6 days ago
Am 14.05.2019 um 15:57 hat Alberto Garcia geschrieben:
> There are a few places in which we turn a number of bytes into sectors
> in order to compare the result against BDRV_REQUEST_MAX_SECTORS
> instead of using BDRV_REQUEST_MAX_BYTES directly.
> 
> Signed-off-by: Alberto Garcia <berto@igalia.com>

Thanks, applied to the block branch.

Kevin

Re: [Qemu-devel] [Qemu-block] [PATCH] block: Use BDRV_REQUEST_MAX_BYTES instead of BDRV_REQUEST_MAX_SECTORS

Posted by Stefano Garzarella 1 week ago
On Tue, May 14, 2019 at 04:57:35PM +0300, Alberto Garcia wrote:
> There are a few places in which we turn a number of bytes into sectors
> in order to compare the result against BDRV_REQUEST_MAX_SECTORS
> instead of using BDRV_REQUEST_MAX_BYTES directly.
> 
> Signed-off-by: Alberto Garcia <berto@igalia.com>
> ---
>  block/io.c     | 6 +++---
>  qemu-io-cmds.c | 7 +++----
>  2 files changed, 6 insertions(+), 7 deletions(-)
> 

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

Thanks,
Stefano