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[Qemu-devel] [PATCH 05/27] block/parallels: add get_block_status
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH 05/27] block/parallels: add get_block_status |
Date: |
Wed, 11 Mar 2015 13:27:59 +0300 |
From: Roman Kagan <address@hidden>
Implement VFS method for get_block_status to Parallels format driver.
Signed-off-by: Roman Kagan <address@hidden>
Reviewed-by: Denis V. Lunev <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Stefan Hajnoczi <address@hidden>
---
block/parallels.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/block/parallels.c b/block/parallels.c
index 8770c82..b469984 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -166,6 +166,26 @@ static int cluster_remainder(BDRVParallelsState *s,
int64_t sector_num,
return MIN(nb_sectors, ret);
}
+static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *pnum)
+{
+ BDRVParallelsState *s = bs->opaque;
+ int64_t offset;
+
+ qemu_co_mutex_lock(&s->lock);
+ offset = seek_to_sector(s, sector_num);
+ qemu_co_mutex_unlock(&s->lock);
+
+ *pnum = cluster_remainder(s, sector_num, nb_sectors);
+
+ if (offset < 0) {
+ return 0;
+ }
+
+ return (offset << BDRV_SECTOR_BITS) |
+ BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
+}
+
static int parallels_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
@@ -213,6 +233,7 @@ static BlockDriver bdrv_parallels = {
.bdrv_open = parallels_open,
.bdrv_read = parallels_co_read,
.bdrv_close = parallels_close,
+ .bdrv_co_get_block_status = parallels_co_get_block_status,
};
static void bdrv_parallels_init(void)
--
1.9.1
- Re: [Qemu-devel] [PATCH 18/27] block/parallels: implement parallels_check method of block driver, (continued)
- [Qemu-devel] [PATCH 07/27] block/parallels: replace magic constants 4, 64 with proper sizeofs, Denis V. Lunev, 2015/03/10
- [Qemu-devel] [PATCH 24/27] block/parallels: delay writing to BAT till bdrv_co_flush_to_os, Denis V. Lunev, 2015/03/10
- [Qemu-devel] [PATCH 21/27] block/parallels: no need to flush on each block allocation table update, Denis V. Lunev, 2015/03/10
- [Qemu-devel] [PATCH 02/27] block/parallels: rename parallels_header to ParallelsHeader, Denis V. Lunev, 2015/03/10
- [Qemu-devel] [PATCH v3 0/27] write/create for Parallels images with reasonable performance, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 22/27] block/parallels: improve image reading performance, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 05/27] block/parallels: add get_block_status,
Denis V. Lunev <=
- [Qemu-devel] [PATCH 01/27] iotests, parallels: quote TEST_IMG in 076 test to be path-safe, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 03/27] block/parallels: switch to bdrv_read, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 24/27] block/parallels: delay writing to BAT till bdrv_co_flush_to_os, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 13/27] block/parallels: rename catalog_ names to bat_, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 10/27] block/parallels: support parallels image creation, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 27/27] block/parallels: improve image writing performance further, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 19/27] block/parallels: implement incorrect close detection, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 11/27] iotests, parallels: test for newly created parallels image via qemu-img, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 15/27] block/parallels: keep BAT bitmap data in little endian in memory, Denis V. Lunev, 2015/03/11
- [Qemu-devel] [PATCH 18/27] block/parallels: implement parallels_check method of block driver, Denis V. Lunev, 2015/03/11