From patchwork Mon Jun 27 00:19:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Li X-Patchwork-Id: 12895939 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 4E0D8C43334 for ; Mon, 27 Jun 2022 00:27:03 +0000 (UTC) Received: from localhost ([::1]:60826 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o5cak-00085K-DO for qemu-devel@archiver.kernel.org; Sun, 26 Jun 2022 20:27:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43058) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o5cTp-0007WF-Sv; Sun, 26 Jun 2022 20:19:53 -0400 Received: from mail-pl1-x630.google.com ([2607:f8b0:4864:20::630]:35600) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1o5cTo-0000bq-2X; Sun, 26 Jun 2022 20:19:53 -0400 Received: by mail-pl1-x630.google.com with SMTP id o18so6761679plg.2; Sun, 26 Jun 2022 17:19:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=uCBSV1a3T0RavDWr47mBjoBHGiE4VvB7HcyvwccMHIE=; b=hd0frErwRGQz3O1CS7pf2b+VjSz5VNEsPY5IY5tww4JXsRYnuReC5Dxw8K8ceyMPu5 wPaZ6uaC+rpSxId183rpRX7cCO8Qs1KJMxvMFFJ50MfM3NYdHdrZrdG1Y4sNFvr/D2M8 At+LsWQGsHaGlfHInwbLYlIzP2yLYdBGxMOWov7dRj2CW0v4Px1SJY6DuPtic8hRvmEn XlFCFkco9rt2tD/pfDLrDEaqmZ07LYq/bMQpzUknhlPNKkQht5H1Ufb/XngWmNUyJws/ bB7yoyUwZynzpCVr47z7CP3CxGN44XF0n1ag/xYCiFRCgpWf+CRyaKmVkvDRwBE6yHZf TU5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=uCBSV1a3T0RavDWr47mBjoBHGiE4VvB7HcyvwccMHIE=; b=fYM8rZC7HSEFkKXI06gisK3AWYfBeGZviVv5U0qcUKNrX4gFBp1Iw08oPlpE+ILrs6 g289v/5/BKPfLe2OaQjqFS1JaNihWq+WVWyEq/OtTHj7XzGc4Uan1UXKHYVpQ1hrPckz p4NPhGZvpZ1nEGZqLHP4aAAQIV8+o9xo+ovCmaTrnjhZgkmbN4BF3Ok/3K2irZBE1uUO IW2/quVjFd/iTYNy4E8NsL0EneXFOssjDTgkR98K5upMZrHlcDhRf+mrZU4uPSlYvo8e RhxrLs6pReOK5pSpGYP9tqD81hc2DAHS34BhB6wwgO0bXIQXIYun2WKFYAigLGYk2xZi 2Plg== X-Gm-Message-State: AJIora+pVrXjfS+p5/ZwLSN08JWCJD/9kjmQU+v7KpS9N5xx0ei2S2KF TfLhgo+IZi7KK3rXua6BJJ9QY7PVoqqfqQ== X-Google-Smtp-Source: AGRyM1vcDzXMhXJ7a2GAhUp1MlyZqh6RjcmIQX/zzJh5b/AKLRDyMAZ9vsQfOeKysdZNL1WUNQoxrg== X-Received: by 2002:a17:90a:6396:b0:1ec:f52d:90db with SMTP id f22-20020a17090a639600b001ecf52d90dbmr12747532pjj.52.1656289190224; Sun, 26 Jun 2022 17:19:50 -0700 (PDT) Received: from fedora.. ([106.84.130.34]) by smtp.gmail.com with ESMTPSA id e11-20020a6558cb000000b00408b89e4282sm5715294pgu.47.2022.06.26.17.19.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Jun 2022 17:19:49 -0700 (PDT) From: Sam Li To: qemu-devel@nongnu.org Cc: hare@suse.de, Hanna Reitz , dmitry.fomichev@wdc.com, Kevin Wolf , Fam Zheng , Stefan Hajnoczi , damien.lemoal@opensource.wdc.com, qemu-block@nongnu.org, Sam Li Subject: [RFC v3 3/5] file-posix: introduce get_sysfs_long_val for zoned device information. Date: Mon, 27 Jun 2022 08:19:15 +0800 Message-Id: <20220627001917.9417-4-faithilikerun@gmail.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220627001917.9417-1-faithilikerun@gmail.com> References: <20220627001917.9417-1-faithilikerun@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::630; envelope-from=faithilikerun@gmail.com; helo=mail-pl1-x630.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Use sysfs attribute files to get the zoned device information in case that ioctl() commands of zone management interface won't work. It can return long type of value like chunk_sectors, zoned_append_max_bytes, max_open_zones, max_active_zones. Reviewed-by: Hannes Reinecke --- block/file-posix.c | 37 +++++++++++++++++++++++++------------ 1 file changed, 25 insertions(+), 12 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 1b8b0d351f..73c2cdfbca 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1216,15 +1216,19 @@ static int hdev_get_max_hw_transfer(int fd, struct stat *st) #endif } -static int hdev_get_max_segments(int fd, struct stat *st) -{ +/* + * Get zoned device information (chunk_sectors, zoned_append_max_bytes, + * max_open_zones, max_active_zones) through sysfs attribute files. + */ +static long get_sysfs_long_val(int fd, struct stat *st, + const char *attribute) { #ifdef CONFIG_LINUX char buf[32]; const char *end; char *sysfspath = NULL; int ret; int sysfd = -1; - long max_segments; + long val; if (S_ISCHR(st->st_mode)) { if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) == 0) { @@ -1237,8 +1241,9 @@ static int hdev_get_max_segments(int fd, struct stat *st) return -ENOTSUP; } - sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments", - major(st->st_rdev), minor(st->st_rdev)); + sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/%s", + major(st->st_rdev), minor(st->st_rdev), + attribute); sysfd = open(sysfspath, O_RDONLY); if (sysfd == -1) { ret = -errno; @@ -1256,9 +1261,9 @@ static int hdev_get_max_segments(int fd, struct stat *st) } buf[ret] = 0; /* The file is ended with '\n', pass 'end' to accept that. */ - ret = qemu_strtol(buf, &end, 10, &max_segments); + ret = qemu_strtol(buf, &end, 10, &val); if (ret == 0 && end && *end == '\n') { - ret = max_segments; + ret = val; } out: @@ -1272,6 +1277,15 @@ out: #endif } +static int hdev_get_max_segments(int fd, struct stat *st) { + int ret; + ret = get_sysfs_long_val(fd, st, "max_segments"); + if (ret < 0) { + return -1; + } + return ret; +} + static void raw_refresh_limits(BlockDriverState *bs, Error **errp) { BDRVRawState *s = bs->opaque; @@ -1872,6 +1886,7 @@ static int handle_aiocb_zone_report(void *opaque) { static int handle_aiocb_zone_mgmt(void *opaque) { RawPosixAIOData *aiocb = opaque; + BlockDriverState *s = aiocb->bs; int fd = aiocb->aio_fildes; int64_t offset = aiocb->aio_offset; int64_t len = aiocb->aio_nbytes; @@ -1884,11 +1899,9 @@ static int handle_aiocb_zone_mgmt(void *opaque) { int64_t zone_size_mask; int ret; - ret = ioctl(fd, BLKGETZONESZ, &zone_size); - if (ret) { - return -1; - } - + g_autofree struct stat *file = g_new(struct stat, 1); + stat(s->filename, file); + zone_size = get_sysfs_long_val(fd, file, "chunk_sectors"); zone_size_mask = zone_size - 1; if (offset & zone_size_mask) { error_report("offset is not the start of a zone");