From patchwork Fri Jan 17 14:14:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 312082 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id BB6432C007A for ; Sat, 18 Jan 2014 01:18:23 +1100 (EST) Received: from localhost ([::1]:38458 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W4AFZ-00020L-Gk for incoming@patchwork.ozlabs.org; Fri, 17 Jan 2014 09:18:21 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56492) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W4AD6-00064J-QC for qemu-devel@nongnu.org; Fri, 17 Jan 2014 09:15:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W4ACz-0005u0-18 for qemu-devel@nongnu.org; Fri, 17 Jan 2014 09:15:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:19518) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W4ACy-0005tb-PG for qemu-devel@nongnu.org; Fri, 17 Jan 2014 09:15:40 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s0HEFY1g031911 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 17 Jan 2014 09:15:34 -0500 Received: from dhcp-200-207.str.redhat.com (ovpn-116-93.ams2.redhat.com [10.36.116.93]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s0HEFSH6001275; Fri, 17 Jan 2014 09:15:32 -0500 From: Kevin Wolf To: qemu-devel@nongnu.org Date: Fri, 17 Jan 2014 15:14:51 +0100 Message-Id: <1389968119-24771-2-git-send-email-kwolf@redhat.com> In-Reply-To: <1389968119-24771-1-git-send-email-kwolf@redhat.com> References: <1389968119-24771-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, pl@kamp.de, mreitz@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, xiawenc@linux.vnet.ibm.com Subject: [Qemu-devel] [PATCH v3 01/29] block: Move initialisation of BlockLimits to bdrv_refresh_limits() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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.c | 19 +++++++++++++++++++ block/iscsi.c | 46 +++++++++++++++++++++++++++++----------------- block/qcow2.c | 11 ++++++++++- block/qed.c | 11 ++++++++++- block/vmdk.c | 22 ++++++++++++++++++---- include/block/block_int.h | 2 ++ 6 files changed, 88 insertions(+), 23 deletions(-) diff --git a/block.c b/block.c index 64e7d22..99e69da 100644 --- a/block.c +++ b/block.c @@ -479,6 +479,19 @@ int bdrv_create_file(const char* filename, QEMUOptionParameter *options, return ret; } +static int bdrv_refresh_limits(BlockDriverState *bs) +{ + BlockDriver *drv = bs->drv; + + memset(&bs->bl, 0, sizeof(bs->bl)); + + if (drv && drv->bdrv_refresh_limits) { + return drv->bdrv_refresh_limits(bs); + } + + return 0; +} + /* * Create a uniquely-named empty temporary file. * Return 0 upon success, otherwise a negative errno value. @@ -833,6 +846,8 @@ static int bdrv_open_common(BlockDriverState *bs, BlockDriverState *file, goto free_and_fail; } + bdrv_refresh_limits(bs); + #ifndef _WIN32 if (bs->is_temporary) { assert(bs->filename[0] != '\0'); @@ -1018,6 +1033,10 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp) } pstrcpy(bs->backing_file, sizeof(bs->backing_file), bs->backing_hd->file->filename); + + /* Recalculate the BlockLimits with the backing file */ + bdrv_refresh_limits(bs); + return 0; } diff --git a/block/iscsi.c b/block/iscsi.c index c0ea0c4..3202dc5 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 8ec9db1..6562994 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 450a1fa..d35bd1c 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 c6b60b4..e26df97 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 { @@ -891,6 +887,23 @@ 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, @@ -2002,6 +2015,7 @@ 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, }; diff --git a/include/block/block_int.h b/include/block/block_int.h index 2772f2f..3dfe724 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -226,6 +226,8 @@ struct BlockDriver { int (*bdrv_debug_resume)(BlockDriverState *bs, const char *tag); bool (*bdrv_debug_is_suspended)(BlockDriverState *bs, const char *tag); + int (*bdrv_refresh_limits)(BlockDriverState *bs); + /* * Returns 1 if newly created images are guaranteed to contain only * zeros, 0 otherwise.