From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 494762BFC85 for ; Tue, 13 May 2025 19:50:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747165846; cv=none; b=nTcAGdDe3e8/rRsN7kpicuhgi85XSSNacCouh8J0JG0Xl58bmQhKqKtgM+iI3f1B9J/+z0JlreYPiKu5lyclzNKlMWzSVRwF/2BP1mGs0GmbGNVrtxk6a1kWBjTza4yWoJceLpFjXGjqtHgThZYmm1ZjK51US1zXGjcvl8GkXdw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747165846; c=relaxed/simple; bh=HsIweHztQRDEL9Sr7WWzJ1t3nEITl1KJeFIW2eKRJmM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=DgrF1updWIR1w8+ctM4OvcieeL53QWB+xO04nb98lMS2XAytzgNeOuqcejAn2ORBf4LgAXKDAwS7dlhLzPxi4UqxTfHQE+nvfIRGAdJPmZUb1614E6eauBlIyCwqTUuAKUoPeGtiWiOz3O4SAhnd1/+de2sz9/mRO9ho1bf+H/E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eSWXcUsz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eSWXcUsz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85224C4CEE4; Tue, 13 May 2025 19:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747165845; bh=HsIweHztQRDEL9Sr7WWzJ1t3nEITl1KJeFIW2eKRJmM=; h=From:To:Cc:Subject:Date:From; b=eSWXcUszDRE4xtNuKnIbzZLgppqSpwwZVnFKOLMKUcMT15OnFzz4mwr26WLe+wC6W +Gs8g6JHinzqtAPCjQS5UHbe9cp3NgWJ1Shsgkpvqr9C1Uk0isckqML4ktned9zdCf s5C8c/g3P+bCcl5L8aPDA3pEmpKcNr3OBsMBrV+7FZQ7peEhOpR60TSv6BjjSdn5Aq Kd9hwLkQbJkwtxtWsFXdCKv7P1q5zRktFaJGpJ0t/Lgzqth6DDG3FtpbP6+7uBVhcU JVcQPdtvwdMV4IGaIdh3WC6XufzSNuti69/NqMgb/6ZdXT33MRJgatz7J+aeYD9cfy sE3tVA6wsdZtw== From: Mike Snitzer To: Trond Myklebust , anna@kernel.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH] NFS: add localio to sysfs Date: Tue, 13 May 2025 15:50:44 -0400 Message-ID: <20250513195044.29431-1-snitzer@kernel.org> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The Linux NFS client and server added support for LOCALIO in Linux v6.12. It is useful to know if a client and server negotiated LOCALIO be used, so expose it through the 'localio' attribute. Suggested-by: Anna Schumaker Signed-off-by: Mike Snitzer --- fs/nfs/sysfs.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c index 37cb2b776435..545148d42dcc 100644 --- a/fs/nfs/sysfs.c +++ b/fs/nfs/sysfs.c @@ -387,6 +387,33 @@ static inline void nfs_sysfs_add_nfsv41_server(struct nfs_server *server) } #endif /* CONFIG_NFS_V4_1 */ +#if IS_ENABLED(CONFIG_NFS_LOCALIO) + +static ssize_t +localio_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct nfs_server *server = container_of(kobj, struct nfs_server, kobj); + bool localio = nfs_server_is_local(server->nfs_client); + return sysfs_emit(buf, "%d\n", localio); +} + +static struct kobj_attribute nfs_sysfs_attr_localio = __ATTR_RO(localio); + +static void nfs_sysfs_add_nfs_localio_server(struct nfs_server *server) +{ + int ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_localio.attr, + nfs_netns_server_namespace(&server->kobj)); + if (ret < 0) + pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n", + server->s_sysfs_id, ret); +} +#else +static inline void nfs_sysfs_add_nfs_localio_server(struct nfs_server *server) +{ +} +#endif /* IS_ENABLED(CONFIG_NFS_LOCALIO) */ + void nfs_sysfs_add_server(struct nfs_server *server) { int ret; @@ -405,6 +432,7 @@ void nfs_sysfs_add_server(struct nfs_server *server) server->s_sysfs_id, ret); nfs_sysfs_add_nfsv41_server(server); + nfs_sysfs_add_nfs_localio_server(server); } EXPORT_SYMBOL_GPL(nfs_sysfs_add_server); -- 2.44.0