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[Qemu-devel] [PULL 07/41] block: add BlockLimits structure to BlockDrive
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PULL 07/41] block: add BlockLimits structure to BlockDriverState |
Date: |
Fri, 29 Nov 2013 17:45:22 +0100 |
From: Peter Lieven <address@hidden>
this patch adds BlockLimits which introduces discard and write_zeroes
limits and alignment information to the BlockDriverState.
Signed-off-by: Peter Lieven <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
include/block/block_int.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index d798208..95140b6 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -230,6 +230,20 @@ struct BlockDriver {
QLIST_ENTRY(BlockDriver) list;
};
+typedef struct BlockLimits {
+ /* maximum number of sectors that can be discarded at once */
+ int max_discard;
+
+ /* optimal alignment for discard requests in sectors */
+ int64_t discard_alignment;
+
+ /* maximum number of sectors that can zeroized at once */
+ int max_write_zeroes;
+
+ /* optimal alignment for write zeroes requests in sectors */
+ int64_t write_zeroes_alignment;
+} BlockLimits;
+
/*
* Note: the function bdrv_append() copies and swaps contents of
* BlockDriverStates, so if you add new fields to this struct, please
@@ -283,6 +297,9 @@ struct BlockDriverState {
uint64_t total_time_ns[BDRV_MAX_IOTYPE];
uint64_t wr_highest_sector;
+ /* I/O Limits */
+ BlockLimits bl;
+
/* Whether the disk can expand beyond total_sectors */
int growable;
--
1.8.1.4
- [Qemu-devel] [PULL 00/41] Block patches for 2.0 (flushing block-next), Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 04/41] block: add logical block provisioning info to BlockDriverInfo, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 02/41] block: add flags to bdrv_*_write_zeroes, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 01/41] block: make BdrvRequestFlags public, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 03/41] block: introduce BDRV_REQ_MAY_UNMAP request flag, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 07/41] block: add BlockLimits structure to BlockDriverState,
Kevin Wolf <=
- [Qemu-devel] [PULL 06/41] block/iscsi: add .bdrv_get_info, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 05/41] block: add wrappers for logical block provisioning information, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 08/41] block/raw: copy BlockLimits on raw_open, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 09/41] block: honour BlockLimits in bdrv_co_do_write_zeroes, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 10/41] block: honour BlockLimits in bdrv_co_discard, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 11/41] iscsi: set limits in BlockDriverState, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 12/41] iscsi: simplify iscsi_co_discard, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 13/41] iscsi: add bdrv_co_write_zeroes, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 14/41] block: introduce bdrv_make_zero, Kevin Wolf, 2013/11/29
- [Qemu-devel] [PULL 15/41] block/get_block_status: fix BDRV_BLOCK_ZERO for unallocated blocks, Kevin Wolf, 2013/11/29