diff options
| author | Peter Lieven <pl@kamp.de> | 2015-02-06 11:54:11 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-02-06 17:24:22 +0100 |
| commit | 75af1f34cd5b07c3c7fcf86dfc99a42de48a600d (patch) | |
| tree | 701e882e64c3023a6e6b9fbd1a9547e5f2d8c5f9 /include/block/block.h | |
| parent | 1ce52846d3ce0e4b58caebcae84719bef6401fbb (diff) | |
| download | qemu-75af1f34cd5b07c3c7fcf86dfc99a42de48a600d.tar.gz | |
block: introduce BDRV_REQUEST_MAX_SECTORS
we check and adjust request sizes at several places with
sometimes inconsistent checks or default values:
INT_MAX
INT_MAX >> BDRV_SECTOR_BITS
UINT_MAX >> BDRV_SECTOR_BITS
SIZE_MAX >> BDRV_SECTOR_BITS
This patches introdocues a macro for the maximal allowed sectors
per request and uses it at several places.
Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include/block/block.h')
| -rw-r--r-- | include/block/block.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index 3082d2b80e..25a6d62d1b 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -83,6 +83,9 @@ typedef enum { #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) +#define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ + INT_MAX >> BDRV_SECTOR_BITS) + /* * Allocation status flags * BDRV_BLOCK_DATA: data is read from bs->file or another file |