From patchwork Tue Mar 13 16:17:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 885283 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 40118R4HPsz9sDX for ; Wed, 14 Mar 2018 03:51:19 +1100 (AEDT) Received: from localhost ([::1]:41202 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1evn8v-0004Ip-Ej for incoming@patchwork.ozlabs.org; Tue, 13 Mar 2018 12:51:17 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60169) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1evmdf-0001yV-Be for qemu-devel@nongnu.org; Tue, 13 Mar 2018 12:19:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1evmdX-0004x6-QF for qemu-devel@nongnu.org; Tue, 13 Mar 2018 12:18:59 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:55402 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1evmdS-0004of-0v; Tue, 13 Mar 2018 12:18:46 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A2B0E406E8B9; Tue, 13 Mar 2018 16:18:45 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-117-214.ams2.redhat.com [10.36.117.214]) by smtp.corp.redhat.com (Postfix) with ESMTP id D3CEA2166BB2; Tue, 13 Mar 2018 16:18:44 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Date: Tue, 13 Mar 2018 17:17:58 +0100 Message-Id: <20180313161803.1814-37-kwolf@redhat.com> In-Reply-To: <20180313161803.1814-1-kwolf@redhat.com> References: <20180313161803.1814-1-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Tue, 13 Mar 2018 16:18:45 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Tue, 13 Mar 2018 16:18:45 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'kwolf@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PULL 36/41] qed: Support .bdrv_co_create X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This adds the .bdrv_co_create driver callback to qed, which enables image creation over QMP. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- qapi/block-core.json | 25 ++++++- block/qed.c | 204 ++++++++++++++++++++++++++++++++++----------------- 2 files changed, 162 insertions(+), 67 deletions(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 7b7d5a01fd..d091817855 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3703,6 +3703,29 @@ '*refcount-bits': 'int' } } ## +# @BlockdevCreateOptionsQed: +# +# Driver specific image creation options for qed. +# +# @file Node to create the image format on +# @size Size of the virtual disk in bytes +# @backing-file File name of the backing file if a backing file +# should be used +# @backing-fmt Name of the block driver to use for the backing file +# @cluster-size Cluster size in bytes (default: 65536) +# @table-size L1/L2 table size (in clusters) +# +# Since: 2.12 +## +{ 'struct': 'BlockdevCreateOptionsQed', + 'data': { 'file': 'BlockdevRef', + 'size': 'size', + '*backing-file': 'str', + '*backing-fmt': 'BlockdevDriver', + '*cluster-size': 'size', + '*table-size': 'int' } } + +## # @BlockdevCreateOptionsRbd: # # Driver specific image creation options for rbd/Ceph. @@ -3864,7 +3887,7 @@ 'parallels': 'BlockdevCreateOptionsParallels', 'qcow': 'BlockdevCreateOptionsQcow', 'qcow2': 'BlockdevCreateOptionsQcow2', - 'qed': 'BlockdevCreateNotSupported', + 'qed': 'BlockdevCreateOptionsQed', 'quorum': 'BlockdevCreateNotSupported', 'raw': 'BlockdevCreateNotSupported', 'rbd': 'BlockdevCreateOptionsRbd', diff --git a/block/qed.c b/block/qed.c index 5e6a6bfaa0..46a84beeed 100644 --- a/block/qed.c +++ b/block/qed.c @@ -20,6 +20,11 @@ #include "trace.h" #include "qed.h" #include "sysemu/block-backend.h" +#include "qapi/qmp/qdict.h" +#include "qapi/qobject-input-visitor.h" +#include "qapi/qapi-visit-block-core.h" + +static QemuOptsList qed_create_opts; static int bdrv_qed_probe(const uint8_t *buf, int buf_size, const char *filename) @@ -594,57 +599,95 @@ static void bdrv_qed_close(BlockDriverState *bs) qemu_vfree(s->l1_table); } -static int qed_create(const char *filename, uint32_t cluster_size, - uint64_t image_size, uint32_t table_size, - const char *backing_file, const char *backing_fmt, - QemuOpts *opts, Error **errp) +static int coroutine_fn bdrv_qed_co_create(BlockdevCreateOptions *opts, + Error **errp) { - QEDHeader header = { - .magic = QED_MAGIC, - .cluster_size = cluster_size, - .table_size = table_size, - .header_size = 1, - .features = 0, - .compat_features = 0, - .l1_table_offset = cluster_size, - .image_size = image_size, - }; + BlockdevCreateOptionsQed *qed_opts; + BlockBackend *blk = NULL; + BlockDriverState *bs = NULL; + + QEDHeader header; QEDHeader le_header; uint8_t *l1_table = NULL; - size_t l1_size = header.cluster_size * header.table_size; - Error *local_err = NULL; + size_t l1_size; int ret = 0; - BlockBackend *blk; - ret = bdrv_create_file(filename, opts, &local_err); - if (ret < 0) { - error_propagate(errp, local_err); - return ret; + assert(opts->driver == BLOCKDEV_DRIVER_QED); + qed_opts = &opts->u.qed; + + /* Validate options and set default values */ + if (!qed_opts->has_cluster_size) { + qed_opts->cluster_size = QED_DEFAULT_CLUSTER_SIZE; + } + if (!qed_opts->has_table_size) { + qed_opts->table_size = QED_DEFAULT_TABLE_SIZE; } - blk = blk_new_open(filename, NULL, NULL, - BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, - &local_err); - if (blk == NULL) { - error_propagate(errp, local_err); + if (!qed_is_cluster_size_valid(qed_opts->cluster_size)) { + error_setg(errp, "QED cluster size must be within range [%u, %u] " + "and power of 2", + QED_MIN_CLUSTER_SIZE, QED_MAX_CLUSTER_SIZE); + return -EINVAL; + } + if (!qed_is_table_size_valid(qed_opts->table_size)) { + error_setg(errp, "QED table size must be within range [%u, %u] " + "and power of 2", + QED_MIN_TABLE_SIZE, QED_MAX_TABLE_SIZE); + return -EINVAL; + } + if (!qed_is_image_size_valid(qed_opts->size, qed_opts->cluster_size, + qed_opts->table_size)) + { + error_setg(errp, "QED image size must be a non-zero multiple of " + "cluster size and less than %" PRIu64 " bytes", + qed_max_image_size(qed_opts->cluster_size, + qed_opts->table_size)); + return -EINVAL; + } + + /* Create BlockBackend to write to the image */ + bs = bdrv_open_blockdev_ref(qed_opts->file, errp); + if (bs == NULL) { return -EIO; } + blk = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL); + ret = blk_insert_bs(blk, bs, errp); + if (ret < 0) { + goto out; + } blk_set_allow_write_beyond_eof(blk, true); + /* Prepare image format */ + header = (QEDHeader) { + .magic = QED_MAGIC, + .cluster_size = qed_opts->cluster_size, + .table_size = qed_opts->table_size, + .header_size = 1, + .features = 0, + .compat_features = 0, + .l1_table_offset = qed_opts->cluster_size, + .image_size = qed_opts->size, + }; + + l1_size = header.cluster_size * header.table_size; + /* File must start empty and grow, check truncate is supported */ ret = blk_truncate(blk, 0, PREALLOC_MODE_OFF, errp); if (ret < 0) { goto out; } - if (backing_file) { + if (qed_opts->has_backing_file) { header.features |= QED_F_BACKING_FILE; header.backing_filename_offset = sizeof(le_header); - header.backing_filename_size = strlen(backing_file); + header.backing_filename_size = strlen(qed_opts->backing_file); - if (qed_fmt_is_raw(backing_fmt)) { - header.features |= QED_F_BACKING_FORMAT_NO_PROBE; + if (qed_opts->has_backing_fmt) { + const char *backing_fmt = BlockdevDriver_str(qed_opts->backing_fmt); + if (qed_fmt_is_raw(backing_fmt)) { + header.features |= QED_F_BACKING_FORMAT_NO_PROBE; + } } } @@ -653,7 +696,7 @@ static int qed_create(const char *filename, uint32_t cluster_size, if (ret < 0) { goto out; } - ret = blk_pwrite(blk, sizeof(le_header), backing_file, + ret = blk_pwrite(blk, sizeof(le_header), qed_opts->backing_file, header.backing_filename_size, 0); if (ret < 0) { goto out; @@ -669,6 +712,7 @@ static int qed_create(const char *filename, uint32_t cluster_size, out: g_free(l1_table); blk_unref(blk); + bdrv_unref(bs); return ret; } @@ -676,51 +720,78 @@ static int coroutine_fn bdrv_qed_co_create_opts(const char *filename, QemuOpts *opts, Error **errp) { - uint64_t image_size = 0; - uint32_t cluster_size = QED_DEFAULT_CLUSTER_SIZE; - uint32_t table_size = QED_DEFAULT_TABLE_SIZE; - char *backing_file = NULL; - char *backing_fmt = NULL; + BlockdevCreateOptions *create_options = NULL; + QDict *qdict = NULL; + QObject *qobj; + Visitor *v; + BlockDriverState *bs = NULL; + Error *local_err = NULL; int ret; - image_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), - BDRV_SECTOR_SIZE); - backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); - backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); - cluster_size = qemu_opt_get_size_del(opts, - BLOCK_OPT_CLUSTER_SIZE, - QED_DEFAULT_CLUSTER_SIZE); - table_size = qemu_opt_get_size_del(opts, BLOCK_OPT_TABLE_SIZE, - QED_DEFAULT_TABLE_SIZE); - - if (!qed_is_cluster_size_valid(cluster_size)) { - error_setg(errp, "QED cluster size must be within range [%u, %u] " - "and power of 2", - QED_MIN_CLUSTER_SIZE, QED_MAX_CLUSTER_SIZE); + static const QDictRenames opt_renames[] = { + { BLOCK_OPT_BACKING_FILE, "backing-file" }, + { BLOCK_OPT_BACKING_FMT, "backing-fmt" }, + { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" }, + { BLOCK_OPT_TABLE_SIZE, "table-size" }, + { NULL, NULL }, + }; + + /* Parse options and convert legacy syntax */ + qdict = qemu_opts_to_qdict_filtered(opts, NULL, &qed_create_opts, true); + + if (!qdict_rename_keys(qdict, opt_renames, errp)) { ret = -EINVAL; - goto finish; + goto fail; } - if (!qed_is_table_size_valid(table_size)) { - error_setg(errp, "QED table size must be within range [%u, %u] " - "and power of 2", - QED_MIN_TABLE_SIZE, QED_MAX_TABLE_SIZE); + + /* Create and open the file (protocol layer) */ + ret = bdrv_create_file(filename, opts, &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + goto fail; + } + + bs = bdrv_open(filename, NULL, NULL, + BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp); + if (bs == NULL) { + ret = -EIO; + goto fail; + } + + /* Now get the QAPI type BlockdevCreateOptions */ + qdict_put_str(qdict, "driver", "qed"); + qdict_put_str(qdict, "file", bs->node_name); + + qobj = qdict_crumple(qdict, errp); + QDECREF(qdict); + qdict = qobject_to_qdict(qobj); + if (qdict == NULL) { ret = -EINVAL; - goto finish; + goto fail; } - if (!qed_is_image_size_valid(image_size, cluster_size, table_size)) { - error_setg(errp, "QED image size must be a non-zero multiple of " - "cluster size and less than %" PRIu64 " bytes", - qed_max_image_size(cluster_size, table_size)); + + v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); + visit_free(v); + + if (local_err) { + error_propagate(errp, local_err); ret = -EINVAL; - goto finish; + goto fail; } - ret = qed_create(filename, cluster_size, image_size, table_size, - backing_file, backing_fmt, opts, errp); + /* Silently round up size */ + assert(create_options->driver == BLOCKDEV_DRIVER_QED); + create_options->u.qed.size = + ROUND_UP(create_options->u.qed.size, BDRV_SECTOR_SIZE); + + /* Create the qed image (format layer) */ + ret = bdrv_qed_co_create(create_options, errp); -finish: - g_free(backing_file); - g_free(backing_fmt); +fail: + QDECREF(qdict); + bdrv_unref(bs); + qapi_free_BlockdevCreateOptions(create_options); return ret; } @@ -1602,6 +1673,7 @@ static BlockDriver bdrv_qed = { .bdrv_close = bdrv_qed_close, .bdrv_reopen_prepare = bdrv_qed_reopen_prepare, .bdrv_child_perm = bdrv_format_default_perms, + .bdrv_co_create = bdrv_qed_co_create, .bdrv_co_create_opts = bdrv_qed_co_create_opts, .bdrv_has_zero_init = bdrv_has_zero_init_1, .bdrv_co_block_status = bdrv_qed_co_block_status,