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=-11.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 B410BC433E0 for ; Wed, 5 Aug 2020 09:04:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9274C22CA1 for ; Wed, 5 Aug 2020 09:04:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728134AbgHEJEe (ORCPT ); Wed, 5 Aug 2020 05:04:34 -0400 Received: from mx2.suse.de ([195.135.220.15]:37766 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725963AbgHEJEd (ORCPT ); Wed, 5 Aug 2020 05:04:33 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id CE5F2AC7D; Wed, 5 Aug 2020 09:04:47 +0000 (UTC) Subject: Re: [PATCH 2/3] btrfs: export currently executing exclusive operation via sysfs To: Goldwyn Rodrigues , linux-btrfs@vger.kernel.org Cc: Goldwyn Rodrigues References: <20200803202913.15913-1-rgoldwyn@suse.de> <20200803202913.15913-3-rgoldwyn@suse.de> From: Nikolay Borisov Autocrypt: addr=nborisov@suse.com; prefer-encrypt=mutual; keydata= xsFNBFiKBz4BEADNHZmqwhuN6EAzXj9SpPpH/nSSP8YgfwoOqwrP+JR4pIqRK0AWWeWCSwmZ T7g+RbfPFlmQp+EwFWOtABXlKC54zgSf+uulGwx5JAUFVUIRBmnHOYi/lUiE0yhpnb1KCA7f u/W+DkwGerXqhhe9TvQoGwgCKNfzFPZoM+gZrm+kWv03QLUCr210n4cwaCPJ0Nr9Z3c582xc bCUVbsjt7BN0CFa2BByulrx5xD9sDAYIqfLCcZetAqsTRGxM7LD0kh5WlKzOeAXj5r8DOrU2 GdZS33uKZI/kZJZVytSmZpswDsKhnGzRN1BANGP8sC+WD4eRXajOmNh2HL4P+meO1TlM3GLl EQd2shHFY0qjEo7wxKZI1RyZZ5AgJnSmehrPCyuIyVY210CbMaIKHUIsTqRgY5GaNME24w7h TyyVCy2qAM8fLJ4Vw5bycM/u5xfWm7gyTb9V1TkZ3o1MTrEsrcqFiRrBY94Rs0oQkZvunqia c+NprYSaOG1Cta14o94eMH271Kka/reEwSZkC7T+o9hZ4zi2CcLcY0DXj0qdId7vUKSJjEep c++s8ncFekh1MPhkOgNj8pk17OAESanmDwksmzh1j12lgA5lTFPrJeRNu6/isC2zyZhTwMWs k3LkcTa8ZXxh0RfWAqgx/ogKPk4ZxOXQEZetkEyTFghbRH2BIwARAQABzSJOaWtvbGF5IEJv cmlzb3YgPG5ib3Jpc292QHN1c2UuZGU+wsF4BBMBAgAiBQJYijkSAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRBxvoJG5T8oV/B6D/9a8EcRPdHg8uLEPywuJR8URwXzkofT5bZE IfGF0Z+Lt2ADe+nLOXrwKsamhweUFAvwEUxxnndovRLPOpWerTOAl47lxad08080jXnGfYFS Dc+ew7C3SFI4tFFHln8Y22Q9075saZ2yQS1ywJy+TFPADIprAZXnPbbbNbGtJLoq0LTiESnD w/SUC6sfikYwGRS94Dc9qO4nWyEvBK3Ql8NkoY0Sjky3B0vL572Gq0ytILDDGYuZVo4alUs8 LeXS5ukoZIw1QYXVstDJQnYjFxYgoQ5uGVi4t7FsFM/6ykYDzbIPNOx49Rbh9W4uKsLVhTzG BDTzdvX4ARl9La2kCQIjjWRg+XGuBM5rxT/NaTS78PXjhqWNYlGc5OhO0l8e5DIS2tXwYMDY LuHYNkkpMFksBslldvNttSNei7xr5VwjVqW4vASk2Aak5AleXZS+xIq2FADPS/XSgIaepyTV tkfnyreep1pk09cjfXY4A7qpEFwazCRZg9LLvYVc2M2eFQHDMtXsH59nOMstXx2OtNMcx5p8 0a5FHXE/HoXz3p9bD0uIUq6p04VYOHsMasHqHPbsMAq9V2OCytJQPWwe46bBjYZCOwG0+x58 fBFreP/NiJNeTQPOa6FoxLOLXMuVtpbcXIqKQDoEte9aMpoj9L24f60G4q+pL/54ql2VRscK d87BTQRYigc+ARAAyJSq9EFk28++SLfg791xOh28tLI6Yr8wwEOvM3wKeTfTZd+caVb9gBBy wxYhIopKlK1zq2YP7ZjTP1aPJGoWvcQZ8fVFdK/1nW+Z8/NTjaOx1mfrrtTGtFxVBdSCgqBB jHTnlDYV1R5plJqK+ggEP1a0mr/rpQ9dFGvgf/5jkVpRnH6BY0aYFPprRL8ZCcdv2DeeicOO YMobD5g7g/poQzHLLeT0+y1qiLIFefNABLN06Lf0GBZC5l8hCM3Rpb4ObyQ4B9PmL/KTn2FV Xq/c0scGMdXD2QeWLePC+yLMhf1fZby1vVJ59pXGq+o7XXfYA7xX0JsTUNxVPx/MgK8aLjYW hX+TRA4bCr4uYt/S3ThDRywSX6Hr1lyp4FJBwgyb8iv42it8KvoeOsHqVbuCIGRCXqGGiaeX Wa0M/oxN1vJjMSIEVzBAPi16tztL/wQtFHJtZAdCnuzFAz8ue6GzvsyBj97pzkBVacwp3/Mw qbiu7sDz7yB0d7J2tFBJYNpVt/Lce6nQhrvon0VqiWeMHxgtQ4k92Eja9u80JDaKnHDdjdwq FUikZirB28UiLPQV6PvCckgIiukmz/5ctAfKpyYRGfez+JbAGl6iCvHYt/wAZ7Oqe/3Cirs5 KhaXBcMmJR1qo8QH8eYZ+qhFE3bSPH446+5oEw8A9v5oonKV7zMAEQEAAcLBXwQYAQIACQUC WIoHPgIbDAAKCRBxvoJG5T8oV1pyD/4zdXdOL0lhkSIjJWGqz7Idvo0wjVHSSQCbOwZDWNTN JBTP0BUxHpPu/Z8gRNNP9/k6i63T4eL1xjy4umTwJaej1X15H8Hsh+zakADyWHadbjcUXCkg OJK4NsfqhMuaIYIHbToi9K5pAKnV953xTrK6oYVyd/Rmkmb+wgsbYQJ0Ur1Ficwhp6qU1CaJ mJwFjaWaVgUERoxcejL4ruds66LM9Z1Qqgoer62ZneID6ovmzpCWbi2sfbz98+kW46aA/w8r 7sulgs1KXWhBSv5aWqKU8C4twKjlV2XsztUUsyrjHFj91j31pnHRklBgXHTD/pSRsN0UvM26 lPs0g3ryVlG5wiZ9+JbI3sKMfbdfdOeLxtL25ujs443rw1s/PVghphoeadVAKMPINeRCgoJH zZV/2Z/myWPRWWl/79amy/9MfxffZqO9rfugRBORY0ywPHLDdo9Kmzoxoxp9w3uTrTLZaT9M KIuxEcV8wcVjr+Wr9zRl06waOCkgrQbTPp631hToxo+4rA1jiQF2M80HAet65ytBVR2pFGZF zGYYLqiG+mpUZ+FPjxk9kpkRYz61mTLSY7tuFljExfJWMGfgSg1OxfLV631jV1TcdUnx+h3l Sqs2vMhAVt14zT8mpIuu2VNxcontxgVr1kzYA/tQg32fVRbGr449j1gw57BV9i0vww== Message-ID: <032ce33e-7249-d08f-1ffe-4ac5a4e20efe@suse.com> Date: Wed, 5 Aug 2020 12:04:30 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200803202913.15913-3-rgoldwyn@suse.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 3.08.20 г. 23:29 ч., Goldwyn Rodrigues wrote: > From: Goldwyn Rodrigues > > /sys/fs//exclusive_operation contains the currently executing > exclusive operation. Add a sysfs_notify() when operation end, so > userspace can be notified of exclusive operation is finished. > > Signed-off-by: Goldwyn Rodrigues Reviewed-by: Nikolay Borisov > --- > fs/btrfs/ioctl.c | 2 ++ > fs/btrfs/sysfs.c | 25 +++++++++++++++++++++++++ > 2 files changed, 27 insertions(+) > > diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c > index 3352b4ffa5c6..664c02a5baf9 100644 > --- a/fs/btrfs/ioctl.c > +++ b/fs/btrfs/ioctl.c > @@ -373,6 +373,8 @@ bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, int type) > void btrfs_exclop_finish(struct btrfs_fs_info *fs_info) > { > atomic_set(&fs_info->exclusive_operation, BTRFS_EXCLOP_NONE); > + sysfs_notify(&fs_info->fs_devices->fsid_kobj, NULL, > + "exclusive_operation"); > } > > /* > diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c > index a39bff64ff24..71950c121588 100644 > --- a/fs/btrfs/sysfs.c > +++ b/fs/btrfs/sysfs.c > @@ -808,6 +808,30 @@ static ssize_t btrfs_checksum_show(struct kobject *kobj, > > BTRFS_ATTR(, checksum, btrfs_checksum_show); > > +static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj, > + struct kobj_attribute *a, char *buf) > +{ > + struct btrfs_fs_info *fs_info = to_fs_info(kobj); > + switch (atomic_read(&fs_info->exclusive_operation)) { > + case BTRFS_EXCLOP_NONE: > + return scnprintf(buf, PAGE_SIZE, "none\n"); > + case BTRFS_EXCLOP_BALANCE: > + return scnprintf(buf, PAGE_SIZE, "balance\n"); > + case BTRFS_EXCLOP_DEV_ADD: > + return scnprintf(buf, PAGE_SIZE, "device add\n"); > + case BTRFS_EXCLOP_DEV_REPLACE: > + return scnprintf(buf, PAGE_SIZE, "device replace\n"); > + case BTRFS_EXCLOP_DEV_REMOVE: > + return scnprintf(buf, PAGE_SIZE, "device remove\n"); > + case BTRFS_EXCLOP_SWAP_ACTIVATE: > + return scnprintf(buf, PAGE_SIZE, "swap activate\n"); > + case BTRFS_EXCLOP_RESIZE: > + return scnprintf(buf, PAGE_SIZE, "resize\n"); > + } > + return 0; > +} > +BTRFS_ATTR(, exclusive_operation, btrfs_exclusive_operation_show); > + > static const struct attribute *btrfs_attrs[] = { > BTRFS_ATTR_PTR(, label), > BTRFS_ATTR_PTR(, nodesize), > @@ -816,6 +840,7 @@ static const struct attribute *btrfs_attrs[] = { > BTRFS_ATTR_PTR(, quota_override), > BTRFS_ATTR_PTR(, metadata_uuid), > BTRFS_ATTR_PTR(, checksum), > + BTRFS_ATTR_PTR(, exclusive_operation), > NULL, > }; > >