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block: Move initialisation of BlockLimits to bdrv_refresh_limits()

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This function separates filling the BlockLimits from bdrv_open(), which
allows it to call it from other operations which may change the limits
(e.g. modifications to the backing file chain or bdrv_reopen)

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
This commit is contained in:
Kevin Wolf 2013-12-11 19:26:16 +01:00
parent dabfa6cc2e
commit d34682cd4a
6 changed files with 87 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

46
block/iscsi.c
View file

@ -1265,23 +1265,6 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
sizeof(struct scsi_inquiry_block_limits));
scsi_free_scsi_task(task);
task = NULL;
if (iscsilun->bl.max_unmap < 0xffffffff) {
bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap,
iscsilun);
}
bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
iscsilun);
if (iscsilun->bl.max_ws_len < 0xffffffff) {
bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len,
iscsilun);
}
bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
iscsilun);
bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len,
iscsilun);
}
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
@ -1326,6 +1309,34 @@ static void iscsi_close(BlockDriverState *bs)
memset(iscsilun, 0, sizeof(IscsiLun));
}
static int iscsi_refresh_limits(BlockDriverState *bs)
{
IscsiLun *iscsilun = bs->opaque;
/* We don't actually refresh here, but just return data queried in
* iscsi_open(): iscsi targets don't change their limits. */
if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
if (iscsilun->bl.max_unmap < 0xffffffff) {
bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap,
iscsilun);
}
bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
iscsilun);
if (iscsilun->bl.max_ws_len < 0xffffffff) {
bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len,
iscsilun);
}
bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
iscsilun);
bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len,
iscsilun);
}
return 0;
}
static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
{
IscsiLun *iscsilun = bs->opaque;
@ -1438,6 +1449,7 @@ static BlockDriver bdrv_iscsi = {
.bdrv_getlength = iscsi_getlength,
.bdrv_get_info = iscsi_get_info,
.bdrv_truncate = iscsi_truncate,
.bdrv_refresh_limits = iscsi_refresh_limits,
#if defined(LIBISCSI_FEATURE_IOVECTOR)
.bdrv_co_get_block_status = iscsi_co_get_block_status,

11
block/qcow2.c
View file

@ -718,7 +718,6 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
qemu_opts_del(opts);
bs->bl.write_zeroes_alignment = s->cluster_sectors;
if (s->use_lazy_refcounts && s->qcow_version < 3) {
error_setg(errp, "Lazy refcounts require a qcow2 image with at least "
@ -751,6 +750,15 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
}
static int qcow2_refresh_limits(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
bs->bl.write_zeroes_alignment = s->cluster_sectors;
return 0;
}
static int qcow2_set_key(BlockDriverState *bs, const char *key)
{
BDRVQcowState *s = bs->opaque;
@ -2268,6 +2276,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_change_backing_file = qcow2_change_backing_file,
.bdrv_refresh_limits = qcow2_refresh_limits,
.bdrv_invalidate_cache = qcow2_invalidate_cache,
.create_options = qcow2_create_options,

11
block/qed.c
View file

@ -495,7 +495,6 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
}
}
bs->bl.write_zeroes_alignment = s->header.cluster_size >> BDRV_SECTOR_BITS;
s->need_check_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
qed_need_check_timer_cb, s);
@ -507,6 +506,15 @@ out:
return ret;
}
static int bdrv_qed_refresh_limits(BlockDriverState *bs)
{
BDRVQEDState *s = bs->opaque;
bs->bl.write_zeroes_alignment = s->header.cluster_size >> BDRV_SECTOR_BITS;
return 0;
}
/* We have nothing to do for QED reopen, stubs just return
* success */
static int bdrv_qed_reopen_prepare(BDRVReopenState *state,
@ -1616,6 +1624,7 @@ static BlockDriver bdrv_qed = {
.bdrv_truncate = bdrv_qed_truncate,
.bdrv_getlength = bdrv_qed_getlength,
.bdrv_get_info = bdrv_qed_get_info,
.bdrv_refresh_limits = bdrv_qed_refresh_limits,
.bdrv_change_backing_file = bdrv_qed_change_backing_file,
.bdrv_invalidate_cache = bdrv_qed_invalidate_cache,
.bdrv_check = bdrv_qed_check,

22
block/vmdk.c
View file

@ -428,10 +428,6 @@ static int vmdk_add_extent(BlockDriverState *bs,
extent->l2_size = l2_size;
extent->cluster_sectors = flat ? sectors : cluster_sectors;
if (!flat) {
bs->bl.write_zeroes_alignment =
MAX(bs->bl.write_zeroes_alignment, cluster_sectors);
}
if (s->num_extents > 1) {
extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
} else {
@ -902,6 +898,23 @@ fail:
return ret;
}
static int vmdk_refresh_limits(BlockDriverState *bs)
{
BDRVVmdkState *s = bs->opaque;
int i;
for (i = 0; i < s->num_extents; i++) {
if (!s->extents[i].flat) {
bs->bl.write_zeroes_alignment =
MAX(bs->bl.write_zeroes_alignment,
s->extents[i].cluster_sectors);
}
}
return 0;
}
static int get_whole_cluster(BlockDriverState *bs,
VmdkExtent *extent,
uint64_t cluster_offset,
@ -2013,6 +2026,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.bdrv_has_zero_init = vmdk_has_zero_init,
.bdrv_get_specific_info = vmdk_get_specific_info,
.bdrv_refresh_limits = vmdk_refresh_limits,
.create_options = vmdk_create_options,
};