From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36053) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YGC6W-0007Bk-Jz for qemu-devel@nongnu.org; Tue, 27 Jan 2015 14:47:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YGC6T-0002E0-BU for qemu-devel@nongnu.org; Tue, 27 Jan 2015 14:47:16 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34035) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YGC6T-0002Ds-5C for qemu-devel@nongnu.org; Tue, 27 Jan 2015 14:47:13 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id t0RJlCvr011685 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 27 Jan 2015 14:47:12 -0500 From: Max Reitz Date: Tue, 27 Jan 2015 14:46:09 -0500 Message-Id: <1422387983-32153-37-git-send-email-mreitz@redhat.com> In-Reply-To: <1422387983-32153-1-git-send-email-mreitz@redhat.com> References: <1422387983-32153-1-git-send-email-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH RESEND 36/50] blockdev: Allow more options for BB-less BDS tree List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Fam Zheng , Jeff Cody , Markus Armbruster , Max Reitz , Stefan Hajnoczi , John Snow Most of the options which blockdev_init() parses for both the BlockBackend and the root BDS are valid for just the root BDS as well (e.g. read-only). This patch allows specifying these options even if not creating a BlockBackend. Signed-off-by: Max Reitz --- blockdev.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 150 insertions(+), 6 deletions(-) diff --git a/blockdev.c b/blockdev.c index d573c5c..2f3ccb5 100644 --- a/blockdev.c +++ b/blockdev.c @@ -591,6 +591,61 @@ err_no_opts: return NULL; } +static QemuOptsList qemu_root_bds_opts; + +/* Takes the ownership of bs_opts */ +static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) +{ + BlockDriverState *bs; + QemuOpts *opts; + Error *local_error = NULL; + ThrottleConfig cfg; + BlockdevDetectZeroesOptions detect_zeroes; + int ret; + int bdrv_flags = 0; + + opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp); + if (!opts) { + goto fail; + } + + qemu_opts_absorb_qdict(opts, bs_opts, &local_error); + if (local_error) { + error_propagate(errp, local_error); + goto fail; + } + + extract_common_blockdev_options(opts, &bdrv_flags, &cfg, &detect_zeroes, + &local_error); + if (local_error) { + error_propagate(errp, local_error); + goto fail; + } + + bs = NULL; + ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, NULL, errp); + if (ret < 0) { + goto fail_no_bs_opts; + } + + bs->detect_zeroes = detect_zeroes; + + /* disk I/O throttling */ + if (throttle_enabled(&cfg)) { + bdrv_io_limits_enable(bs); + bdrv_set_io_limits(bs, &cfg); + } + +fail_no_bs_opts: + qemu_opts_del(opts); + return bs; + +fail: + qemu_opts_del(opts); + QDECREF(bs_opts); + return NULL; +} + static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, Error **errp) { @@ -2994,12 +3049,8 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp) bs = blk_bs(blk); } else { - int ret; - - bs = NULL; - ret = bdrv_open(&bs, NULL, NULL, qdict, BDRV_O_RDWR | BDRV_O_CACHE_WB, - NULL, errp); - if (ret < 0) { + bs = bds_tree_init(qdict, errp); + if (!bs) { goto fail; } } @@ -3150,6 +3201,99 @@ QemuOptsList qemu_common_drive_opts = { }, }; +static QemuOptsList qemu_root_bds_opts = { + .name = "root-bds", + .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), + .desc = { + { + .name = "discard", + .type = QEMU_OPT_STRING, + .help = "discard operation (ignore/off, unmap/on)", + },{ + .name = "cache.writeback", + .type = QEMU_OPT_BOOL, + .help = "enables writeback mode for any caches", + },{ + .name = "cache.direct", + .type = QEMU_OPT_BOOL, + .help = "enables use of O_DIRECT (bypass the host page cache)", + },{ + .name = "cache.no-flush", + .type = QEMU_OPT_BOOL, + .help = "ignore any flush requests for the device", + },{ + .name = "aio", + .type = QEMU_OPT_STRING, + .help = "host AIO implementation (threads, native)", + },{ + .name = "read-only", + .type = QEMU_OPT_BOOL, + .help = "open drive file as read-only", + },{ + .name = "throttling.iops-total", + .type = QEMU_OPT_NUMBER, + .help = "limit total I/O operations per second", + },{ + .name = "throttling.iops-read", + .type = QEMU_OPT_NUMBER, + .help = "limit read operations per second", + },{ + .name = "throttling.iops-write", + .type = QEMU_OPT_NUMBER, + .help = "limit write operations per second", + },{ + .name = "throttling.bps-total", + .type = QEMU_OPT_NUMBER, + .help = "limit total bytes per second", + },{ + .name = "throttling.bps-read", + .type = QEMU_OPT_NUMBER, + .help = "limit read bytes per second", + },{ + .name = "throttling.bps-write", + .type = QEMU_OPT_NUMBER, + .help = "limit write bytes per second", + },{ + .name = "throttling.iops-total-max", + .type = QEMU_OPT_NUMBER, + .help = "I/O operations burst", + },{ + .name = "throttling.iops-read-max", + .type = QEMU_OPT_NUMBER, + .help = "I/O operations read burst", + },{ + .name = "throttling.iops-write-max", + .type = QEMU_OPT_NUMBER, + .help = "I/O operations write burst", + },{ + .name = "throttling.bps-total-max", + .type = QEMU_OPT_NUMBER, + .help = "total bytes burst", + },{ + .name = "throttling.bps-read-max", + .type = QEMU_OPT_NUMBER, + .help = "total bytes read burst", + },{ + .name = "throttling.bps-write-max", + .type = QEMU_OPT_NUMBER, + .help = "total bytes write burst", + },{ + .name = "throttling.iops-size", + .type = QEMU_OPT_NUMBER, + .help = "when limiting by iops max size of an I/O in bytes", + },{ + .name = "copy-on-read", + .type = QEMU_OPT_BOOL, + .help = "copy read data from backing file into image file", + },{ + .name = "detect-zeroes", + .type = QEMU_OPT_STRING, + .help = "try to optimize zero writes (off, on, unmap)", + }, + { /* end of list */ } + }, +}; + QemuOptsList qemu_drive_opts = { .name = "drive", .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), -- 2.1.0