From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 44288C04AB6 for ; Tue, 28 May 2019 15:14:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 265ED206C1 for ; Tue, 28 May 2019 15:14:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727968AbfE1POH (ORCPT ); Tue, 28 May 2019 11:14:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35143 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727921AbfE1POG (ORCPT ); Tue, 28 May 2019 11:14:06 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7F468301988B; Tue, 28 May 2019 15:14:06 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-125-65.rdu2.redhat.com [10.10.125.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 29E44C087F; Tue, 28 May 2019 15:14:05 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 21/25] fsinfo: pstore - add sb operation fsinfo() [ver #13] From: David Howells To: viro@zeniv.linux.org.uk Cc: dhowells@redhat.com, raven@themaw.net, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mszeredi@redhat.com Date: Tue, 28 May 2019 16:14:04 +0100 Message-ID: <155905644440.1662.3745883327641806605.stgit@warthog.procyon.org.uk> In-Reply-To: <155905626142.1662.18430571708534506785.stgit@warthog.procyon.org.uk> References: <155905626142.1662.18430571708534506785.stgit@warthog.procyon.org.uk> User-Agent: StGit/unknown-version MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Tue, 28 May 2019 15:14:06 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ian Kent The new fsinfo() system call adds a new super block operation ->fsinfo() which is used by file systems to provide file system specific information for fsinfo() requests. The fsinfo() request FSINFO_ATTR_PARAMETERS provides the same function as sb operation ->show_options() so it needs to be implemented by any file system that provides ->show_options() as a minimum. Signed-off-by: Ian Kent Signed-off-by: David Howells --- fs/pstore/inode.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 4640debf8755..44f4ffc4436e 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -36,6 +36,7 @@ #include #include #include +#include #include "internal.h" @@ -281,6 +282,33 @@ static int pstore_show_options(struct seq_file *m, struct dentry *root) return 0; } +#ifdef CONFIG_FSINFO +/* + * Get filesystem information. + */ +static int pstore_fsinfo(struct path *path, struct fsinfo_kparams *params) +{ + struct fsinfo_capabilities *caps; + + switch (params->request) { + case FSINFO_ATTR_CAPABILITIES: + caps = params->buffer; + fsinfo_set_cap(caps, FSINFO_CAP_IS_FLASH_FS); + fsinfo_set_cap(caps, FSINFO_CAP_HAS_CTIME); + fsinfo_set_cap(caps, FSINFO_CAP_HAS_MTIME); + return sizeof(*caps); + + case FSINFO_ATTR_PARAMETERS: + if (kmsg_bytes != PSTORE_DEFAULT_KMSG_BYTES) + fsinfo_note_paramf(params, "kmsg_bytes", "%lu", kmsg_bytes); + return params->usage; + + default: + return generic_fsinfo(path, params); + } +} +#endif /* CONFIG_FSINFO */ + static int pstore_reconfigure(struct fs_context *fc) { sync_filesystem(fc->root->d_sb); @@ -293,6 +321,9 @@ static const struct super_operations pstore_ops = { .drop_inode = generic_delete_inode, .evict_inode = pstore_evict_inode, .show_options = pstore_show_options, +#ifdef CONFIG_FSINFO + .fsinfo = pstore_fsinfo, +#endif }; static struct super_block *pstore_sb;