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([106.84.130.246]) by smtp.gmail.com with ESMTPSA id z15-20020a170903018f00b0016ee708350bsm2418564plg.14.2022.08.05.00.58.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Aug 2022 00:58:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=CmKuBcw8ARJwBYjuXzUoGFsoFdqkxX9OVMWD9ZCDqJ0=; b=BSL5nBvxLHHdphXbYJOYMDuaMHZPJgeFTjbGx/Q9CnI2Sk8Q0dz9CIGp5ixdEliEwQ YPsatZbdc9QCan7I2XZmZ4xOFI7SgmflEYjyQLg1KTrdnlRUIRt+VuFLVjjwANLi5O9y Zm0nqSfTdaH9fovdVvd+fSmOvNYT6XisF5+UNRMXzES65f7GDWdoJutnIVPqTUuFg78Q Ooj9yWHC+ld60ID8gQFkJtBUBP3dzbRT1rGFDqI1jz24wcJRNt76qQh821uVlWM6m0HK wImLY6yNSaSsczC1cm+VidNC/NblwUdjKd1P4Q/vpVpOCFSRVptwizway/cZnokYl1Jp CYGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=CmKuBcw8ARJwBYjuXzUoGFsoFdqkxX9OVMWD9ZCDqJ0=; b=Fqj5ayOwQ1b/X5U5nz6TXNdM03QtGRxNXHbL48ik9HXOhZgkYkU/rBCdezuQkKldgK Sg9+9hDEoEeF7+C0WmXU6A8iHEpwvuHHK4j196cBFf8t+Doz69CQhS1vFkDQRndZ2siR t14iPXDKAZOpVFaC3ZQ/xpvIOXR/YfvU/vf+j/ZTIRwJd7yj/OLnYfYWx5SXaNE7Egsm PpwcGMhJYAKCL5UpDWf3CwfZT1xEpk/PMRCCx12vivIy9mjuwMPAtw+Yi8hrJCLyY83+ KjLAWYmV7hbzr4dCjg5v7DfVy0dbWCW7RliSnFHbkEesW9U1SI4kiRqT6AFZYlRMJ5sP sd3Q== X-Gm-Message-State: ACgBeo3OswpHB5G9DeurFsmClnINl2W72x1yW2BtleJGNtbJ9wamr9s8 PNtD3Y1f7QJQnLOUN0QljIex12hNCIiAOg== X-Google-Smtp-Source: AA6agR6Yv5ywlZL2tbhvAEK9FSkbuV3ADYvz1pBrFxHDGsscF0B1lNbHX+1S9VBEj7M3lJuZ+9b7Zw== X-Received: by 2002:a17:902:e848:b0:16f:8f:9027 with SMTP id t8-20020a170902e84800b0016f008f9027mr5756015plg.66.1659686290363; Fri, 05 Aug 2022 00:58:10 -0700 (PDT) From: Sam Li To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, hare@suse.de, Stefan Hajnoczi , dmitry.fomichev@wdc.com, Kevin Wolf , damien.lemoal@opensource.wdc.com, Eric Blake , Fam Zheng , Markus Armbruster , Hanna Reitz , Sam Li Subject: [PATCH v6 2/8] file-posix: introduce get_sysfs_long_val for the long sysfs attribute Date: Fri, 5 Aug 2022 15:57:45 +0800 Message-Id: <20220805075751.77499-3-faithilikerun@gmail.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220805075751.77499-1-faithilikerun@gmail.com> References: <20220805075751.77499-1-faithilikerun@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1030; envelope-from=faithilikerun@gmail.com; helo=mail-pj1-x1030.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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1659686527005100001 Content-Type: text/plain; charset="utf-8" Use sysfs attribute files to get the long value of zoned device information. Signed-off-by: Sam Li Reviewed-by: Hannes Reinecke Reviewed-by: Stefan Hajnoczi --- block/file-posix.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 48cd096624..a40eab64a2 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1210,29 +1210,27 @@ static int hdev_get_max_hw_transfer(int fd, struct = stat *st) #endif } =20 -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 =3D NULL; int ret; int sysfd =3D -1; - long max_segments; - - if (S_ISCHR(st->st_mode)) { - if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) =3D=3D 0) { - return ret; - } - return -ENOTSUP; - } + long val; =20 if (!S_ISBLK(st->st_mode)) { return -ENOTSUP; } =20 - sysfspath =3D g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments= ", - major(st->st_rdev), minor(st->st_rdev)); + sysfspath =3D g_strdup_printf("/sys/dev/block/%u:%u/queue/%s", + major(st->st_rdev), minor(st->st_rdev), + attribute); sysfd =3D open(sysfspath, O_RDONLY); if (sysfd =3D=3D -1) { ret =3D -errno; @@ -1250,9 +1248,9 @@ static int hdev_get_max_segments(int fd, struct stat = *st) } buf[ret] =3D 0; /* The file is ended with '\n', pass 'end' to accept that. */ - ret =3D qemu_strtol(buf, &end, 10, &max_segments); + ret =3D qemu_strtol(buf, &end, 10, &val); if (ret =3D=3D 0 && end && *end =3D=3D '\n') { - ret =3D max_segments; + ret =3D val; } =20 out: @@ -1266,6 +1264,17 @@ out: #endif } =20 +static int hdev_get_max_segments(int fd, struct stat *st) { + int ret; + if (S_ISCHR(st->st_mode)) { + if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) =3D=3D 0) { + return ret; + } + return -ENOTSUP; + } + return get_sysfs_long_val(fd, st, "max_segments"); +} + static void raw_refresh_limits(BlockDriverState *bs, Error **errp) { BDRVRawState *s =3D bs->opaque; --=20 2.37.1