From patchwork Mon Oct 14 19:28:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 11189379 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6540517E6 for ; Mon, 14 Oct 2019 19:39:05 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 46A512089C for ; Mon, 14 Oct 2019 19:39:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 46A512089C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:56408 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iK6BM-0007w6-3Z for patchwork-qemu-devel@patchwork.kernel.org; Mon, 14 Oct 2019 15:39:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40359) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iK62U-0005yD-IP for qemu-devel@nongnu.org; Mon, 14 Oct 2019 15:29:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iK62S-0002jT-Kz for qemu-devel@nongnu.org; Mon, 14 Oct 2019 15:29:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51790) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iK62P-0002gZ-1m; Mon, 14 Oct 2019 15:29:49 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4AFA7A3CD82; Mon, 14 Oct 2019 19:29:48 +0000 (UTC) Received: from probe.bos.redhat.com (dhcp-17-152.bos.redhat.com [10.18.17.152]) by smtp.corp.redhat.com (Postfix) with ESMTP id E610A60C18; Mon, 14 Oct 2019 19:29:46 +0000 (UTC) From: John Snow To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL v2 07/19] block/dirty-bitmap: drop BdrvDirtyBitmap.mutex Date: Mon, 14 Oct 2019 15:28:57 -0400 Message-Id: <20191014192909.16044-8-jsnow@redhat.com> In-Reply-To: <20191014192909.16044-1-jsnow@redhat.com> References: <20191014192909.16044-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.68]); Mon, 14 Oct 2019 19:29:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org, Juan Quintela , libvir-list@redhat.com, John Snow , "Dr. David Alan Gilbert" , Max Reitz , Stefan Hajnoczi , Markus Armbruster Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy mutex field is just a pointer to bs->dirty_bitmap_mutex, so no needs to store it in BdrvDirtyBitmap when we have bs pointer in it (since previous patch). Drop mutex field. Constantly use bdrv_dirty_bitmaps_lock/unlock in block/dirty-bitmap.c to make it more obvious that it's not per-bitmap lock. Still, for simplicity, leave bdrv_dirty_bitmap_lock/unlock functions as an external API. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: John Snow Message-id: 20190916141911.5255-4-vsementsov@virtuozzo.com Signed-off-by: John Snow --- block/dirty-bitmap.c | 84 +++++++++++++++++++++----------------------- 1 file changed, 41 insertions(+), 43 deletions(-) diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 44453ff824..4e5c87a907 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -29,7 +29,6 @@ #include "qemu/main-loop.h" struct BdrvDirtyBitmap { - QemuMutex *mutex; BlockDriverState *bs; HBitmap *bitmap; /* Dirty bitmap implementation */ bool busy; /* Bitmap is busy, it can't be used via QMP */ @@ -72,12 +71,12 @@ static inline void bdrv_dirty_bitmaps_unlock(BlockDriverState *bs) void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); } void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap) { - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called with BQL or dirty_bitmap lock taken. */ @@ -117,7 +116,6 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, } bitmap = g_new0(BdrvDirtyBitmap, 1); bitmap->bs = bs; - bitmap->mutex = &bs->dirty_bitmap_mutex; bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(granularity)); bitmap->size = bitmap_size; bitmap->name = g_strdup(name); @@ -151,9 +149,9 @@ static bool bdrv_dirty_bitmap_busy(const BdrvDirtyBitmap *bitmap) void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); bitmap->busy = busy; - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called with BQL taken. */ @@ -278,10 +276,10 @@ void bdrv_enable_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap) /* Called with BQL taken. */ void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap) { - assert(bitmap->mutex == bitmap->successor->mutex); - qemu_mutex_lock(bitmap->mutex); + assert(bitmap->bs == bitmap->successor->bs); + bdrv_dirty_bitmaps_lock(bitmap->bs); bdrv_enable_dirty_bitmap_locked(bitmap->successor); - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called within bdrv_dirty_bitmap_lock..unlock and with BQL taken. */ @@ -361,9 +359,9 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BdrvDirtyBitmap *parent, { BdrvDirtyBitmap *ret; - qemu_mutex_lock(parent->mutex); + bdrv_dirty_bitmaps_lock(parent->bs); ret = bdrv_reclaim_dirty_bitmap_locked(parent, errp); - qemu_mutex_unlock(parent->mutex); + bdrv_dirty_bitmaps_unlock(parent->bs); return ret; } @@ -543,16 +541,16 @@ bool bdrv_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name, void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap) { - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); bitmap->disabled = true; - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap) { - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); bdrv_enable_dirty_bitmap_locked(bitmap); - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs) @@ -593,9 +591,9 @@ bool bdrv_dirty_bitmap_get_locked(BdrvDirtyBitmap *bitmap, int64_t offset) bool bdrv_dirty_bitmap_get(BdrvDirtyBitmap *bitmap, int64_t offset) { bool ret; - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); ret = bdrv_dirty_bitmap_get_locked(bitmap, offset); - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); return ret; } @@ -660,9 +658,9 @@ void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, int64_t offset, int64_t bytes) { - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); bdrv_set_dirty_bitmap_locked(bitmap, offset, bytes); - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called within bdrv_dirty_bitmap_lock..unlock */ @@ -676,15 +674,15 @@ void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, int64_t offset, int64_t bytes) { - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); bdrv_reset_dirty_bitmap_locked(bitmap, offset, bytes); - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out) { assert(!bdrv_dirty_bitmap_readonly(bitmap)); - bdrv_dirty_bitmap_lock(bitmap); + bdrv_dirty_bitmaps_lock(bitmap->bs); if (!out) { hbitmap_reset_all(bitmap->bitmap); } else { @@ -693,7 +691,7 @@ void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out) hbitmap_granularity(backup)); *out = backup; } - bdrv_dirty_bitmap_unlock(bitmap); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } void bdrv_restore_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *backup) @@ -788,9 +786,9 @@ bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap) /* Called with BQL taken. */ void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); bitmap->readonly = value; - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } bool bdrv_has_readonly_bitmaps(BlockDriverState *bs) @@ -808,27 +806,27 @@ bool bdrv_has_readonly_bitmaps(BlockDriverState *bs) /* Called with BQL taken. */ void bdrv_dirty_bitmap_set_persistence(BdrvDirtyBitmap *bitmap, bool persistent) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); bitmap->persistent = persistent; - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called with BQL taken. */ void bdrv_dirty_bitmap_set_inconsistent(BdrvDirtyBitmap *bitmap) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); assert(bitmap->persistent == true); bitmap->inconsistent = true; bitmap->disabled = true; - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } /* Called with BQL taken. */ void bdrv_dirty_bitmap_skip_store(BdrvDirtyBitmap *bitmap, bool skip) { - qemu_mutex_lock(bitmap->mutex); + bdrv_dirty_bitmaps_lock(bitmap->bs); bitmap->skip_store = skip; - qemu_mutex_unlock(bitmap->mutex); + bdrv_dirty_bitmaps_unlock(bitmap->bs); } bool bdrv_dirty_bitmap_get_persistence(BdrvDirtyBitmap *bitmap) @@ -888,9 +886,9 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, { bool ret; - qemu_mutex_lock(dest->mutex); - if (src->mutex != dest->mutex) { - qemu_mutex_lock(src->mutex); + bdrv_dirty_bitmaps_lock(dest->bs); + if (src->bs != dest->bs) { + bdrv_dirty_bitmaps_lock(src->bs); } if (bdrv_dirty_bitmap_check(dest, BDRV_BITMAP_DEFAULT, errp)) { @@ -910,9 +908,9 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, assert(ret); out: - qemu_mutex_unlock(dest->mutex); - if (src->mutex != dest->mutex) { - qemu_mutex_unlock(src->mutex); + bdrv_dirty_bitmaps_unlock(dest->bs); + if (src->bs != dest->bs) { + bdrv_dirty_bitmaps_unlock(src->bs); } } @@ -936,9 +934,9 @@ bool bdrv_dirty_bitmap_merge_internal(BdrvDirtyBitmap *dest, assert(!bdrv_dirty_bitmap_inconsistent(src)); if (lock) { - qemu_mutex_lock(dest->mutex); - if (src->mutex != dest->mutex) { - qemu_mutex_lock(src->mutex); + bdrv_dirty_bitmaps_lock(dest->bs); + if (src->bs != dest->bs) { + bdrv_dirty_bitmaps_lock(src->bs); } } @@ -951,9 +949,9 @@ bool bdrv_dirty_bitmap_merge_internal(BdrvDirtyBitmap *dest, } if (lock) { - qemu_mutex_unlock(dest->mutex); - if (src->mutex != dest->mutex) { - qemu_mutex_unlock(src->mutex); + bdrv_dirty_bitmaps_unlock(dest->bs); + if (src->bs != dest->bs) { + bdrv_dirty_bitmaps_unlock(src->bs); } }