From patchwork Wed Mar 29 10:56:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 9651209 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7B5AE602BE for ; Wed, 29 Mar 2017 10:56:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 78B812846B for ; Wed, 29 Mar 2017 10:56:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6C79E2845D; Wed, 29 Mar 2017 10:56:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A25752845D for ; Wed, 29 Mar 2017 10:56:45 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-1.v29.ch3.sourceforge.com) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ctBHK-00073a-Cc; Wed, 29 Mar 2017 10:56:38 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ctBHI-00073V-Qw for v9fs-developer@lists.sourceforge.net; Wed, 29 Mar 2017 10:56:36 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of suse.cz designates 195.135.220.15 as permitted sender) client-ip=195.135.220.15; envelope-from=jack@suse.cz; helo=mx2.suse.de; Received: from mx2.suse.de ([195.135.220.15]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1ctBHH-0007hz-Mk for v9fs-developer@lists.sourceforge.net; Wed, 29 Mar 2017 10:56:36 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 312BBAD31; Wed, 29 Mar 2017 10:56:29 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 3B3A21E125B; Wed, 29 Mar 2017 12:56:26 +0200 (CEST) From: Jan Kara To: Date: Wed, 29 Mar 2017 12:56:05 +0200 Message-Id: <20170329105623.18241-8-jack@suse.cz> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20170329105623.18241-1-jack@suse.cz> References: <20170329105623.18241-1-jack@suse.cz> X-Headers-End: 1ctBHH-0007hz-Mk Cc: Latchesar Ionkov , Christoph Hellwig , Jan Kara , Eric Van Hensbergen , linux-block@vger.kernel.org, v9fs-developer@lists.sourceforge.net, Ron Minnich Subject: [V9fs-developer] [PATCH 07/25] 9p: Convert to separately allocated bdi X-BeenThere: v9fs-developer@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: v9fs-developer-bounces@lists.sourceforge.net X-Virus-Scanned: ClamAV using ClamSMTP Allocate struct backing_dev_info separately instead of embedding it inside session. This unifies handling of bdi among users. CC: Eric Van Hensbergen CC: Ron Minnich CC: Latchesar Ionkov CC: v9fs-developer@lists.sourceforge.net Signed-off-by: Jan Kara Reviewed-by: Christoph Hellwig --- fs/9p/v9fs.c | 10 +--------- fs/9p/v9fs.h | 1 - fs/9p/vfs_super.c | 15 ++++++++++++--- 3 files changed, 13 insertions(+), 13 deletions(-) diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index a89f3cfe3c7d..c202930086ed 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -333,10 +333,6 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, goto err_names; init_rwsem(&v9ses->rename_sem); - rc = bdi_setup_and_register(&v9ses->bdi, "9p"); - if (rc) - goto err_names; - v9ses->uid = INVALID_UID; v9ses->dfltuid = V9FS_DEFUID; v9ses->dfltgid = V9FS_DEFGID; @@ -345,7 +341,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, if (IS_ERR(v9ses->clnt)) { rc = PTR_ERR(v9ses->clnt); p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n"); - goto err_bdi; + goto err_names; } v9ses->flags = V9FS_ACCESS_USER; @@ -415,8 +411,6 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, err_clnt: p9_client_destroy(v9ses->clnt); -err_bdi: - bdi_destroy(&v9ses->bdi); err_names: kfree(v9ses->uname); kfree(v9ses->aname); @@ -445,8 +439,6 @@ void v9fs_session_close(struct v9fs_session_info *v9ses) kfree(v9ses->uname); kfree(v9ses->aname); - bdi_destroy(&v9ses->bdi); - spin_lock(&v9fs_sessionlist_lock); list_del(&v9ses->slist); spin_unlock(&v9fs_sessionlist_lock); diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 443d12e02043..76eaf49abd3a 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -114,7 +114,6 @@ struct v9fs_session_info { kuid_t uid; /* if ACCESS_SINGLE, the uid that has access */ struct p9_client *clnt; /* 9p client */ struct list_head slist; /* list of sessions registered with v9fs */ - struct backing_dev_info bdi; struct rw_semaphore rename_sem; }; diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index de3ed8629196..a0965fb587a5 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -72,10 +72,12 @@ static int v9fs_set_super(struct super_block *s, void *data) * */ -static void +static int v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, int flags, void *data) { + int ret; + sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize_bits = fls(v9ses->maxdata - 1); sb->s_blocksize = 1 << sb->s_blocksize_bits; @@ -85,7 +87,11 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, sb->s_xattr = v9fs_xattr_handlers; } else sb->s_op = &v9fs_super_ops; - sb->s_bdi = &v9ses->bdi; + + ret = super_setup_bdi(sb); + if (ret) + return ret; + if (v9ses->cache) sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_SIZE; @@ -99,6 +105,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, #endif save_mount_options(sb, data); + return 0; } /** @@ -138,7 +145,9 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, retval = PTR_ERR(sb); goto clunk_fid; } - v9fs_fill_super(sb, v9ses, flags, data); + retval = v9fs_fill_super(sb, v9ses, flags, data); + if (retval) + goto release_sb; if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) sb->s_d_op = &v9fs_cached_dentry_operations;