From d34682cd4a06efe9ee3fc8cb7e8a0ea445299989 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Wed, 11 Dec 2013 19:26:16 +0100 Subject: block: Move initialisation of BlockLimits to bdrv_refresh_limits() 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 Reviewed-by: Max Reitz Reviewed-by: Benoit Canet --- block/iscsi.c | 46 +++++++++++++++++++++++++++++----------------- block/qcow2.c | 11 ++++++++++- block/qed.c | 11 ++++++++++- block/vmdk.c | 22 ++++++++++++++++++---- 4 files changed, 67 insertions(+), 23 deletions(-) (limited to 'block') diff --git a/block/iscsi.c b/block/iscsi.c index 76b3c96d38..c8bf8dc049 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -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, diff --git a/block/qcow2.c b/block/qcow2.c index e15a4dd057..2da62b8a90 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -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, diff --git a/block/qed.c b/block/qed.c index 0dd5c5859e..694e6e2ee0 100644 --- a/block/qed.c +++ b/block/qed.c @@ -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, diff --git a/block/vmdk.c b/block/vmdk.c index 67b5f96a19..99ca60fdb9 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -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, }; 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