From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59597) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fT9pO-0003Ry-3b for qemu-devel@nongnu.org; Wed, 13 Jun 2018 13:45:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fT9pK-0007P4-NH for qemu-devel@nongnu.org; Wed, 13 Jun 2018 13:45:02 -0400 From: Anton Nefedov Date: Wed, 13 Jun 2018 20:44:26 +0300 Message-Id: <1528911866-37489-9-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1528911866-37489-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1528911866-37489-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v3 8/8] qapi: query-blockstat: add driver specific file-posix stats List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, armbru@redhat.com, jsnow@redhat.com, pbonzini@redhat.com, eblake@redhat.com, berto@igalia.com, den@virtuozzo.com, Anton Nefedov A block driver can provide a callback to report driver-specific statistics. file-posix driver now reports discard statistics Signed-off-by: Anton Nefedov --- qapi/block-core.json | 39 +++++++++++++++++++++++++++++++++++++++ include/block/block.h | 1 + include/block/block_int.h | 1 + block.c | 9 +++++++++ block/file-posix.c | 17 +++++++++++++++++ block/qapi.c | 5 +++++ 6 files changed, 72 insertions(+) diff --git a/qapi/block-core.json b/qapi/block-core.json index a859011..800cf2c 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -886,6 +886,42 @@ '*x_flush_latency_histogram': 'BlockLatencyHistogramInfo' } } ## +# @BlockStatsSpecificFile: +# +# File driver statistics +# +# @discard-nb-ok: The number of succeeded discard operations performed by +# the driver. +# +# @discard-nb-failed: The number of failed discard operations performed by +# the driver. +# +# @discard-bytes-ok: The number of bytes discarded by the driver. +# +# Since 3.0 +## +{ 'struct': 'BlockStatsSpecificFile', + 'data': { + 'discard-nb-ok': 'int', + 'discard-nb-failed': 'int', + 'discard-bytes-ok': 'int' + } } + +## +# @BlockStatsSpecific: +# +# Block driver specific statistics +# +# Since: 3.0 +## +{ 'union': 'BlockStatsSpecific', + 'base': { 'driver': 'BlockdevDriver' }, + 'discriminator': 'driver', + 'data': { + 'file': 'BlockStatsSpecificFile' + } } + +## # @BlockStats: # # Statistics of a virtual block device or a block backing device. @@ -897,6 +933,8 @@ # # @stats: A @BlockDeviceStats for the device. # +# @driver-specific: Optional driver-specific stats. (Since 3.0) +# # @parent: This describes the file block device if it has one. # Contains recursively the statistics of the underlying # protocol (e.g. the host file for a qcow2 image). If there is @@ -910,6 +948,7 @@ { 'struct': 'BlockStats', 'data': {'*device': 'str', '*node-name': 'str', 'stats': 'BlockDeviceStats', + '*driver-specific': 'BlockStatsSpecific', '*parent': 'BlockStats', '*backing': 'BlockStats'} } diff --git a/include/block/block.h b/include/block/block.h index e677080..b263d8a 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -445,6 +445,7 @@ const char *bdrv_get_device_or_node_name(const BlockDriverState *bs); int bdrv_get_flags(BlockDriverState *bs); int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); +BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs); void bdrv_round_to_clusters(BlockDriverState *bs, int64_t offset, int64_t bytes, int64_t *cluster_offset, diff --git a/include/block/block_int.h b/include/block/block_int.h index 327e478..2456723 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -317,6 +317,7 @@ struct BlockDriver { Error **errp); int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs); + BlockStatsSpecific *(*bdrv_get_specific_stats)(BlockDriverState *bs); int coroutine_fn (*bdrv_save_vmstate)(BlockDriverState *bs, QEMUIOVector *qiov, diff --git a/block.c b/block.c index 5088708..46c91c8 100644 --- a/block.c +++ b/block.c @@ -4172,6 +4172,15 @@ ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs) return NULL; } +BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs) +{ + BlockDriver *drv = bs->drv; + if (!drv || !drv->bdrv_get_specific_stats) { + return NULL; + } + return drv->bdrv_get_specific_stats(bs); +} + void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event) { if (!bs || !bs->drv || !bs->drv->bdrv_debug_event) { diff --git a/block/file-posix.c b/block/file-posix.c index 4a2e394..0bc2cb6 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2518,6 +2518,21 @@ static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) return 0; } +static BlockStatsSpecific *raw_get_specific_stats(BlockDriverState *bs) +{ + BDRVRawState *s = bs->opaque; + BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1); + + stats->driver = BLOCKDEV_DRIVER_FILE; + stats->u.file = (BlockStatsSpecificFile){ + .discard_nb_ok = s->stats.discard_nb_ok, + .discard_nb_failed = s->stats.discard_nb_failed, + .discard_bytes_ok = s->stats.discard_bytes_ok, + }; + + return stats; +} + static QemuOptsList raw_create_opts = { .name = "raw-create-opts", .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), @@ -2623,6 +2638,7 @@ BlockDriver bdrv_file = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, + .bdrv_get_specific_stats = raw_get_specific_stats, .bdrv_check_perm = raw_check_perm, .bdrv_set_perm = raw_set_perm, .bdrv_abort_perm_update = raw_abort_perm_update, @@ -3104,6 +3120,7 @@ static BlockDriver bdrv_host_device = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, + .bdrv_get_specific_stats = raw_get_specific_stats, .bdrv_check_perm = raw_check_perm, .bdrv_set_perm = raw_set_perm, .bdrv_abort_perm_update = raw_abort_perm_update, diff --git a/block/qapi.c b/block/qapi.c index 2ee90d4..29b7898 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -535,6 +535,11 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs, s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset); + s->driver_specific = bdrv_get_specific_stats(bs); + if (s->driver_specific) { + s->has_driver_specific = true; + } + if (bs->file) { s->has_parent = true; s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level); -- 2.7.4