From: Anton Nefedov Date: Mon, 23 Sep 2019 12:17:37 +0000 (+0300) Subject: qapi: query-blockstat: add driver specific file-posix stats X-Git-Tag: v4.2.0~114^2~11 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=d924559953c0b679582548d8fd8af025667051e3;p=mirror_qemu.git qapi: query-blockstat: add driver specific file-posix stats A block driver can provide a callback to report driver-specific statistics. file-posix driver now reports discard statistics Signed-off-by: Anton Nefedov Reviewed-by: Vladimir Sementsov-Ogievskiy Acked-by: Markus Armbruster Message-id: 20190923121737.83281-10-anton.nefedov@virtuozzo.com Signed-off-by: Max Reitz --- diff --git a/block.c b/block.c index 1c7c199849..1946fc6f57 100644 --- a/block.c +++ b/block.c @@ -5155,6 +5155,15 @@ 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 f3934c4e10..695fcf740d 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2753,6 +2753,36 @@ static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) return 0; } +static BlockStatsSpecificFile get_blockstats_specific_file(BlockDriverState *bs) +{ + BDRVRawState *s = bs->opaque; + return (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, + }; +} + +static BlockStatsSpecific *raw_get_specific_stats(BlockDriverState *bs) +{ + BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1); + + stats->driver = BLOCKDEV_DRIVER_FILE; + stats->u.file = get_blockstats_specific_file(bs); + + return stats; +} + +static BlockStatsSpecific *hdev_get_specific_stats(BlockDriverState *bs) +{ + BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1); + + stats->driver = BLOCKDEV_DRIVER_HOST_DEVICE; + stats->u.host_device = get_blockstats_specific_file(bs); + + return stats; +} + static QemuOptsList raw_create_opts = { .name = "raw-create-opts", .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), @@ -2960,6 +2990,7 @@ 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, @@ -3438,6 +3469,7 @@ 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 = hdev_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 69c35c4196..9a5d0c9b27 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -543,6 +543,11 @@ 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); diff --git a/include/block/block.h b/include/block/block.h index 37c9de7446..792bb826db 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -501,6 +501,7 @@ int bdrv_get_flags(BlockDriverState *bs); int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs, Error **errp); +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 0422acdf1c..2b113eb3c7 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -366,6 +366,7 @@ struct BlockDriver { int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs, Error **errp); + BlockStatsSpecific *(*bdrv_get_specific_stats)(BlockDriverState *bs); int coroutine_fn (*bdrv_save_vmstate)(BlockDriverState *bs, QEMUIOVector *qiov, diff --git a/qapi/block-core.json b/qapi/block-core.json index 7d3e05891c..859acea014 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -960,6 +960,41 @@ '*wr_latency_histogram': 'BlockLatencyHistogramInfo', '*flush_latency_histogram': 'BlockLatencyHistogramInfo' } } +## +# @BlockStatsSpecificFile: +# +# File driver statistics +# +# @discard-nb-ok: The number of successful 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: 4.2 +## +{ 'struct': 'BlockStatsSpecificFile', + 'data': { + 'discard-nb-ok': 'uint64', + 'discard-nb-failed': 'uint64', + 'discard-bytes-ok': 'uint64' } } + +## +# @BlockStatsSpecific: +# +# Block driver specific statistics +# +# Since: 4.2 +## +{ 'union': 'BlockStatsSpecific', + 'base': { 'driver': 'BlockdevDriver' }, + 'discriminator': 'driver', + 'data': { + 'file': 'BlockStatsSpecificFile', + 'host_device': 'BlockStatsSpecificFile' } } + ## # @BlockStats: # @@ -975,6 +1010,8 @@ # # @stats: A @BlockDeviceStats for the device. # +# @driver-specific: Optional driver-specific stats. (Since 4.2) +# # @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 @@ -988,6 +1025,7 @@ { 'struct': 'BlockStats', 'data': {'*device': 'str', '*qdev': 'str', '*node-name': 'str', 'stats': 'BlockDeviceStats', + '*driver-specific': 'BlockStatsSpecific', '*parent': 'BlockStats', '*backing': 'BlockStats'} }