[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 05/12] block/parallels: add get_block_status
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH 05/12] block/parallels: add get_block_status |
Date: |
Mon, 22 Dec 2014 16:06:03 +0300 |
From: Roman Kagan <address@hidden>
Implement VFS method for get_block_status to Parallels format driver.
Signed-off-by: Roman Kagan <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Jeff Cody <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
- [Qemu-devel] [PATCH 0/12] write/create for Parallels images, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 02/12] block/parallels: rename parallels_header to ParallelsHeader, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 03/12] block/parallels: switch to bdrv_read, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 06/12] block/parallels: provide _co_readv routine for parallels format driver, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 01/12] iotests, parallels: quote TEST_IMG in 076 test to be path-safe, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 07/12] block/parallels: replace magic constants 4, 64 with proper sizeofs, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 05/12] block/parallels: add get_block_status,
Denis V. Lunev <=
- [Qemu-devel] [PATCH 04/12] block/parallels: read up to cluster end in one go, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 09/12] iotests, parallels: test for write into Parallels image, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 08/12] block/parallels: _co_writev callback for Parallels format, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 11/12] iotests, parallels: test for newly created parallels image via qemu-img, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 12/12] parallels: change copyright information in the image header, Denis V. Lunev, 2014/12/22
- [Qemu-devel] [PATCH 10/12] block/parallels: support parallels image creation, Denis V. Lunev, 2014/12/22