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[Qemu-devel] [PATCH 14/31] gluster: Switch to .bdrv_co_block_status()
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH 14/31] gluster: Switch to .bdrv_co_block_status() |
Date: |
Mon, 17 Apr 2017 20:33:39 -0500 |
We are gradually moving away from sector-based interfaces, towards
byte-based. Update the gluster driver accordingly.
Signed-off-by: Eric Blake <address@hidden>
---
block/gluster.c | 47 +++++++++++++++++++++++------------------------
1 file changed, 23 insertions(+), 24 deletions(-)
diff --git a/block/gluster.c b/block/gluster.c
index 1d4e2f7..3f252c6 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -1332,24 +1332,24 @@ exit:
/*
* Returns the allocation status of the specified sectors.
*
- * If 'sector_num' is beyond the end of the disk image the return value is 0
+ * If 'offset' is beyond the end of the disk image the return value is 0
* and 'pnum' is set to 0.
*
- * 'pnum' is set to the number of sectors (including and immediately following
- * the specified sector) that are known to be in the same
+ * 'pnum' is set to the number of bytes (including and immediately following
+ * the specified offset) that are known to be in the same
* allocated/unallocated state.
*
- * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
+ * 'bytes' is the max value 'pnum' should be set to. If bytes goes
* beyond the end of the disk image it will be clamped.
*
- * (Based on raw_co_get_block_status() from file-posix.c.)
+ * (Based on raw_co_block_status() from file-posix.c.)
*/
-static int64_t coroutine_fn qemu_gluster_co_get_block_status(
- BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
+static int64_t coroutine_fn qemu_gluster_co_block_status(
+ BlockDriverState *bs, int64_t offset, int64_t bytes, int64_t *pnum,
BlockDriverState **file)
{
BDRVGlusterState *s = bs->opaque;
- off_t start, data = 0, hole = 0;
+ off_t data = 0, hole = 0;
int64_t total_size;
int ret = -EINVAL;
@@ -1357,41 +1357,40 @@ static int64_t coroutine_fn
qemu_gluster_co_get_block_status(
return ret;
}
- start = sector_num * BDRV_SECTOR_SIZE;
total_size = bdrv_getlength(bs);
if (total_size < 0) {
return total_size;
- } else if (start >= total_size) {
+ } else if (offset >= total_size) {
*pnum = 0;
return 0;
- } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
- nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
+ } else if (offset + bytes > total_size) {
+ bytes = total_size - offset;
}
- ret = find_allocation(bs, start, &data, &hole);
+ ret = find_allocation(bs, offset, &data, &hole);
if (ret == -ENXIO) {
/* Trailing hole */
- *pnum = nb_sectors;
+ *pnum = bytes;
ret = BDRV_BLOCK_ZERO;
} else if (ret < 0) {
/* No info available, so pretend there are no holes */
- *pnum = nb_sectors;
+ *pnum = bytes;
ret = BDRV_BLOCK_DATA;
- } else if (data == start) {
+ } else if (data == offset) {
/* On a data extent, compute sectors to the end of the extent,
* possibly including a partial sector at EOF. */
- *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
+ *pnum = MIN(bytes, hole - offset);
ret = BDRV_BLOCK_DATA;
} else {
/* On a hole, compute sectors to the beginning of the next extent. */
- assert(hole == start);
- *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
+ assert(hole == offset);
+ *pnum = MIN(bytes, data - offset);
ret = BDRV_BLOCK_ZERO;
}
*file = bs;
- return ret | BDRV_BLOCK_OFFSET_VALID | start;
+ return ret | BDRV_BLOCK_OFFSET_VALID | (offset & BDRV_BLOCK_OFFSET_MASK);
}
@@ -1419,7 +1418,7 @@ static BlockDriver bdrv_gluster = {
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
@@ -1447,7 +1446,7 @@ static BlockDriver bdrv_gluster_tcp = {
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
@@ -1475,7 +1474,7 @@ static BlockDriver bdrv_gluster_unix = {
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
@@ -1509,7 +1508,7 @@ static BlockDriver bdrv_gluster_rdma = {
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
--
2.9.3
- [Qemu-devel] [PATCH 06/31] block: Convert bdrv_get_block_status() to bytes, (continued)
- [Qemu-devel] [PATCH 06/31] block: Convert bdrv_get_block_status() to bytes, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 07/31] block: Switch bdrv_co_get_block_status() to byte-based, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 08/31] block: Switch BdrvCoGetBlockStatusData to byte-based, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 09/31] block: Switch bdrv_co_get_block_status_above() to byte-based, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 10/31] block: Convert bdrv_get_block_status_above() to bytes, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 12/31] commit: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 11/31] block: Add .bdrv_co_block_status() callback, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 13/31] file-posix: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 14/31] gluster: Switch to .bdrv_co_block_status(),
Eric Blake <=
- [Qemu-devel] [PATCH 15/31] iscsi: Switch cluster_sectors to byte-based, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 18/31] mirror: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 16/31] iscsi: Switch iscsi_allocmap_update() to byte-based, Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 17/31] iscsi: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 19/31] null: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17
- [Qemu-devel] [PATCH 20/31] parallels: Switch to .bdrv_co_block_status(), Eric Blake, 2017/04/17