From patchwork Mon Aug 31 11:07:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 275128 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 190F8C433E2 for ; Mon, 31 Aug 2020 11:09:52 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D4B6D2137B for ; Mon, 31 Aug 2020 11:09:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D4B6D2137B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=vivier.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kChh9-0003bz-1j for qemu-devel@archiver.kernel.org; Mon, 31 Aug 2020 07:09:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48240) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kCheu-00077B-44 for qemu-devel@nongnu.org; Mon, 31 Aug 2020 07:07:32 -0400 Received: from mout.kundenserver.de ([212.227.17.24]:60799) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kCheq-0000RQ-P1 for qemu-devel@nongnu.org; Mon, 31 Aug 2020 07:07:31 -0400 Received: from localhost.localdomain ([82.252.135.186]) by mrelayeu.kundenserver.de (mreue106 [212.227.15.183]) with ESMTPSA (Nemesis) id 1N6t3Z-1kepiW1t4p-018JXs; Mon, 31 Aug 2020 13:07:23 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 4/8] linux-user: Add support for btrfs ioctls used to get/set features Date: Mon, 31 Aug 2020 13:07:12 +0200 Message-Id: <20200831110716.536808-5-laurent@vivier.eu> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200831110716.536808-1-laurent@vivier.eu> References: <20200831110716.536808-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:j7ljY1ww8JtvgeUo2cgQ8ZbxgFvaHXLSn/jZDDAC4x4mVl6qKvd r56KwoOnLAcQkE1El/MgVpqneMS4/G4nteP5EszreOlTT1IJwUXAY30rwlUz2z4JV+5aD0L hJrjqpwOSdxdn5f1ITySPlNq5BqR+lkyeXOt7IB9+K9tL8NFrIwpXUk2KZYNy6ef4g7DhRY q5cWd4jbYUA48bUO+A2zQ== X-UI-Out-Filterresults: notjunk:1; V03:K0:2WQC4smgRqA=:4dMe/2waTPp/dgZZUUlVon opmtgt06MAfHNydlUmf4l1eE1fdwrfWodVxD5ZXu7hzc70gL/ABH3PbFO7hx+GWL/pgxrcPMS L09y/3K6Ik25dMf03C0R+z98EbKfTnUyOfn6If1n66VW+26xhiS27fdHMaRKV0qYSRWaa+kcg glYS0lN6X9nFcXFh1neFoHEwD8obDfeO7B/BvQF8Mf1Bpmlh6ap5CE82ENOgLJxh+eLGsEwjm 3IsRdXjDWCjxhhNbpwdcNj1vrV/q6DIhPjcZINpQMxj5Ocqx/mCNI3yu7SXGskOdA84W5yt8N J6O9zMgt7fm2vHk7j5JIVegArGE/i7VFJhH/9+7Eu1BsiCWRLm4AtyNAAnQ+zL99dakfWJ2ta W5ITEkMxBN5lU3b8geSIdA9KecuMZ35cipJgZsvTgZwnQaijV3RiEQ3IycNc+Y7V2/6g7je3k GpcPaxLWUCBrqxZnfyANw0EAJyNvf0nGJjIXQnyhsW4hpPxZ2mIcx4H2eGkT9+tLZIb0/Hzrj 8P4I+qqhJiWOG7MchAD4F3fKCrEQXjNWXd2IT+5fK8cfzEAnMtK7ggDaQiatGjaB79236CsQk qgjgPM8UFgOachEzuHEu38xgoE6ko5cOKunD1zJ8JAdXWqmgYYghW4cRHmkZ0NhdkkwtcrcyX MGS/B9qwK7QKhjoiS4Ne38oxjNJJgWV04Nvn4V76UJXUWpy/D/UVc6V/ajxEIb6sI1Z8cge2C HzlBjDNr8kqcOi6v11n3CbJdI3+ePpPP0DreH3y/1WFx2meVyVaufuKWvRU1Etd/WYSsufNT7 KkdX9wUwD6yGduxKcrraKrYsVId6wxc9mELtNDFJzsjKgQN6ssZVdFdq8kHVMXMl199cQxh Received-SPF: none client-ip=212.227.17.24; envelope-from=laurent@vivier.eu; helo=mout.kundenserver.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/31 07:07:27 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Laurent Vivier , Filip Bozuta Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Filip Bozuta This patch implements functionality for following ioctls: BTRFS_IOC_GET_FEATURES - Getting feature flags Read feature flags for a btrfs filesystem. The feature flags are returned inside the ioctl's third argument which represents a pointer to a following structure type: struct btrfs_ioctl_feature_flags { __u64 compat_flags; __u64 compat_ro_flags; __u64 incompat_flags; }; All of the structure field represent bit masks that can be composed of values which can be found on: https://elixir.bootlin.com/linux/latest/source/fs/btrfs/ctree.h#L282 BTRFS_IOC_SET_FEATURES - Setting feature flags Set and clear feature flags for a btrfs filesystem. The feature flags are set using the ioctl's third argument which represents a 'struct btrfs_ioctl_feature_flags[2]' array. The first element of the array represent flags which are to be cleared and the second element of the array represent flags which are to be set. The second element has the priority over the first, which means that if there are matching flags in the elements, they will be set in the filesystem. If the flag values in the third argument aren't correctly set to be composed of the available predefined flag values, errno ENOPERM ("Operation not permitted") is returned. BTRFS_IOC_GET_SUPPORTED_FEATURES - Getting supported feature flags Read supported feature flags for a btrfs filesystem. The supported feature flags are read using the ioctl's third argument which represents a 'struct btrfs_ioctl_feature_flags[3]' array. The first element of this array represents all of the supported flags in the btrfs filesystem. The second element represents flags that can be safely set and third element represent flags that can be safely clearead. Implementation notes: All of the implemented ioctls use 'struct btrfs_ioctl_feature_flags' as third argument. That is the reason why a corresponding defintion was added in file 'linux-user/syscall_types.h'. Signed-off-by: Filip Bozuta Tested-by: Daniel P. Berrangé Message-Id: <20200823195014.116226-5-Filip.Bozuta@syrmia.com> Signed-off-by: Laurent Vivier --- linux-user/ioctls.h | 12 ++++++++++++ linux-user/syscall_defs.h | 3 +++ linux-user/syscall_types.h | 5 +++++ 3 files changed, 20 insertions(+) diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h index 74d73994f691..11d7361848dd 100644 --- a/linux-user/ioctls.h +++ b/linux-user/ioctls.h @@ -216,6 +216,18 @@ IOCTL(BTRFS_IOC_GET_DEV_STATS, IOC_RW, MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_dev_stats))) #endif +#ifdef BTRFS_IOC_GET_FEATURES + IOCTL(BTRFS_IOC_GET_FEATURES, IOC_R, + MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_feature_flags))) +#endif +#ifdef BTRFS_IOC_SET_FEATURES + IOCTL(BTRFS_IOC_SET_FEATURES, IOC_W, + MK_PTR(MK_ARRAY(MK_STRUCT(STRUCT_btrfs_ioctl_feature_flags), 2))) +#endif +#ifdef BTRFS_IOC_GET_SUPPORTED_FEATURES + IOCTL(BTRFS_IOC_GET_SUPPORTED_FEATURES, IOC_R, + MK_PTR(MK_ARRAY(MK_STRUCT(STRUCT_btrfs_ioctl_feature_flags), 3))) +#endif #ifdef BTRFS_IOC_GET_SUBVOL_INFO IOCTL(BTRFS_IOC_GET_SUBVOL_INFO, IOC_R, MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_subvol_info_args))) diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index d11279b78bbe..f70138979704 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -1019,6 +1019,9 @@ struct target_rtc_pll_info { abi_ullong) #define TARGET_BTRFS_IOC_DEV_INFO TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 30) #define TARGET_BTRFS_IOC_GET_DEV_STATS TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 52) +#define TARGET_BTRFS_IOC_GET_FEATURES TARGET_IORU(BTRFS_IOCTL_MAGIC, 57) +#define TARGET_BTRFS_IOC_SET_FEATURES TARGET_IOWU(BTRFS_IOCTL_MAGIC, 57) +#define TARGET_BTRFS_IOC_GET_SUPPORTED_FEATURES TARGET_IORU(BTRFS_IOCTL_MAGIC, 57) #define TARGET_BTRFS_IOC_GET_SUBVOL_INFO TARGET_IORU(BTRFS_IOCTL_MAGIC, 60) /* usb ioctls */ diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h index 7e52b7aec5d9..eba0c43d4493 100644 --- a/linux-user/syscall_types.h +++ b/linux-user/syscall_types.h @@ -413,6 +413,11 @@ STRUCT(btrfs_ioctl_get_dev_stats, 128 - 2 - BTRFS_DEV_STAT_VALUES_MAX)) /* unused */ #endif +STRUCT(btrfs_ioctl_feature_flags, + TYPE_ULONGLONG, /* compat_flags */ + TYPE_ULONGLONG, /* compat_ro_flags */ + TYPE_ULONGLONG) /* incompat_flags */ + STRUCT(rtc_time, TYPE_INT, /* tm_sec */ TYPE_INT, /* tm_min */