From patchwork Mon Dec 7 00:15:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gao Xiang X-Patchwork-Id: 11954669 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 7AD90C433FE for ; Mon, 7 Dec 2020 00:18:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52E3122E03 for ; Mon, 7 Dec 2020 00:18:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728209AbgLGASJ (ORCPT ); Sun, 6 Dec 2020 19:18:09 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:41721 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726046AbgLGASI (ORCPT ); Sun, 6 Dec 2020 19:18:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607300200; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=5tlUKSSQUsZTbvO71wj/cVAdrW23gTJMB2a6uPVVt+c=; b=Bbyw8MFl4yRX+LaBXl9ofyN40PhYSfCjBFedn3Z8bwO81I6J04sNi3AqGp1Z8L2JaOAZis eoVaf6Iya+SMhyOL/paEOFvoJPVgEgz2qKDYp+Yr264EcqLsgOM9IgEQP2dtTrJz5TJFYN /cbvd8u6fuQYHW9BHLxFIHeNgz3sIs8= Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-373-_g1YUUxIOGOvwcs5Ses5mg-1; Sun, 06 Dec 2020 19:16:39 -0500 X-MC-Unique: _g1YUUxIOGOvwcs5Ses5mg-1 Received: by mail-pf1-f199.google.com with SMTP id x20so7881480pfm.6 for ; Sun, 06 Dec 2020 16:16:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=5tlUKSSQUsZTbvO71wj/cVAdrW23gTJMB2a6uPVVt+c=; b=PQMyNT7hb6bIVJC6+1wgvqKwwdpBzgjdA1/0uiV87VqaQpR0TaP+dxPQk7AXVJAUPb 1vXa2kVAew3t5vhN0j9unUaZCvaKjjypqBBC/Y6LZoUk5+RmvkQCqAxTHn1rquD8mlTI WSCgtrwWKTPJcueXRJP4coIG2xMUjFP0IrNViruyNuER/ipiqkXCV5dXDUbaEyXb5Oz9 YHb1K8R7sOPNdBCzzMbX2IT9bVX4xmlr5MUVTkvCbOAMiD8xvrC3H3U10fY1fuP+1bCa lq/Xqq7tPIMbrVYeckUwCpKovlmNTfO0CALAqqINICpNyRB8e5a42xp9db9ndTdgErxh zlew== X-Gm-Message-State: AOAM532sIh92mZifb190mU768eJ8Z2RbZtAH8H/lXT5baWDcQq4oKb58 1gET7V/wqImb4oihyYFULKT4JdjSsGFxOEe2PqUMbvTTUliTrXA1nsjt7xqDWdt/hE0+YK8niVV hwrKN2F16BMtEneEqbDcVByjK/NQ7iAN8K9PnXXwKQCApYhjtYMgvQd8lyP7eRsO+tgrqyhWFfA == X-Received: by 2002:a17:90b:33d1:: with SMTP id lk17mr14397240pjb.174.1607300197758; Sun, 06 Dec 2020 16:16:37 -0800 (PST) X-Google-Smtp-Source: ABdhPJwoxitVsPYiNWslMMp0z8atrIjbeAHe3kmTG5QQpW3eFJdkdaHDWbNziodm8y729Nm7MsKtTw== X-Received: by 2002:a17:90b:33d1:: with SMTP id lk17mr14397212pjb.174.1607300197390; Sun, 06 Dec 2020 16:16:37 -0800 (PST) Received: from xiangao.remote.csb ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id o9sm8218056pjl.11.2020.12.06.16.16.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Dec 2020 16:16:36 -0800 (PST) From: Gao Xiang To: linux-xfs@vger.kernel.org Cc: "Darrick J. Wong" , Dave Chinner , Christoph Hellwig , Eric Sandeen , Dave Chinner , Gao Xiang Subject: [PATCH v3 3/6] xfs: move on-disk inode allocation out of xfs_ialloc() Date: Mon, 7 Dec 2020 08:15:30 +0800 Message-Id: <20201207001533.2702719-4-hsiangkao@redhat.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20201207001533.2702719-1-hsiangkao@redhat.com> References: <20201207001533.2702719-1-hsiangkao@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Dave Chinner So xfs_ialloc() will only address in-core inode allocation then, Also, rename xfs_ialloc() to xfs_dir_ialloc_init() in order to keep everything in xfs_inode.c under the same namespace. Reviewed-by: Darrick J. Wong Signed-off-by: Dave Chinner Signed-off-by: Gao Xiang --- fs/xfs/xfs_inode.c | 202 +++++++++++++++------------------------------ 1 file changed, 66 insertions(+), 136 deletions(-) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 6672cdffcda5..22843e81bccf 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -761,68 +761,25 @@ xfs_inode_inherit_flags2( } /* - * Allocate an inode on disk and return a copy of its in-core version. - * The in-core inode is locked exclusively. Set mode, nlink, and rdev - * appropriately within the inode. The uid and gid for the inode are - * set according to the contents of the given cred structure. - * - * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() - * has a free inode available, call xfs_iget() to obtain the in-core - * version of the allocated inode. Finally, fill in the inode and - * log its initial contents. In this case, ialloc_context would be - * set to NULL. - * - * If xfs_dialloc() does not have an available inode, it will replenish - * its supply by doing an allocation. Since we can only do one - * allocation within a transaction without deadlocks, we must commit - * the current transaction before returning the inode itself. - * In this case, therefore, we will set ialloc_context and return. - * The caller should then commit the current transaction, start a new - * transaction, and call xfs_ialloc() again to actually get the inode. - * - * To ensure that some other process does not grab the inode that - * was allocated during the first call to xfs_ialloc(), this routine - * also returns the [locked] bp pointing to the head of the freelist - * as ialloc_context. The caller should hold this buffer across - * the commit and pass it back into this routine on the second call. - * - * If we are allocating quota inodes, we do not have a parent inode - * to attach to or associate with (i.e. pip == NULL) because they - * are not linked into the directory structure - they are attached - * directly to the superblock - and so have no parent. + * Initialise a newly allocated inode and return the in-core inode to the + * caller locked exclusively. */ -static int -xfs_ialloc( - xfs_trans_t *tp, - xfs_inode_t *pip, - umode_t mode, - xfs_nlink_t nlink, - dev_t rdev, - prid_t prid, - xfs_buf_t **ialloc_context, - xfs_inode_t **ipp) +static struct xfs_inode * +xfs_dir_ialloc_init( + struct xfs_trans *tp, + struct xfs_inode *pip, + xfs_ino_t ino, + umode_t mode, + xfs_nlink_t nlink, + dev_t rdev, + prid_t prid) { - struct xfs_mount *mp = tp->t_mountp; - xfs_ino_t ino; - xfs_inode_t *ip; - uint flags; - int error; - struct timespec64 tv; - struct inode *inode; - - /* - * Call the space management code to pick - * the on-disk inode to be allocated. - */ - error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, - ialloc_context, &ino); - if (error) - return error; - if (*ialloc_context || ino == NULLFSINO) { - *ipp = NULL; - return 0; - } - ASSERT(*ialloc_context == NULL); + struct xfs_mount *mp = tp->t_mountp; + struct xfs_inode *ip; + unsigned int flags; + int error; + struct timespec64 tv; + struct inode *inode; /* * Protect against obviously corrupt allocation btree records. Later @@ -833,18 +790,16 @@ xfs_ialloc( */ if ((pip && ino == pip->i_ino) || !xfs_verify_dir_ino(mp, ino)) { xfs_alert(mp, "Allocated a known in-use inode 0x%llx!", ino); - return -EFSCORRUPTED; + return ERR_PTR(-EFSCORRUPTED); } /* - * Get the in-core inode with the lock held exclusively. - * This is because we're setting fields here we need - * to prevent others from looking at until we're done. + * Get the in-core inode with the lock held exclusively to prevent + * others from looking at until we're done. */ - error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, - XFS_ILOCK_EXCL, &ip); + error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, XFS_ILOCK_EXCL, &ip); if (error) - return error; + return ERR_PTR(error); ASSERT(ip != NULL); inode = VFS_I(ip); inode->i_mode = mode; @@ -926,20 +881,19 @@ xfs_ialloc( /* now that we have an i_mode we can setup the inode structure */ xfs_setup_inode(ip); - - *ipp = ip; - return 0; + return ip; } /* - * Allocates a new inode from disk and return a pointer to the - * incore copy. This routine will internally commit the current - * transaction and allocate a new one if the Space Manager needed - * to do an allocation to replenish the inode free-list. - * - * This routine is designed to be called from xfs_create and - * xfs_create_dir. + * Allocates a new inode from disk and return a pointer to the incore copy. This + * routine will internally commit the current transaction and allocate a new one + * if we needed to allocate more on-disk free inodes to perform the requested + * operation. * + * If we are allocating quota inodes, we do not have a parent inode to attach to + * or associate with (i.e. dp == NULL) because they are not linked into the + * directory structure - they are attached directly to the superblock - and so + * have no parent. */ int xfs_dir_ialloc( @@ -954,83 +908,59 @@ xfs_dir_ialloc( xfs_inode_t **ipp) /* pointer to inode; it will be locked. */ { - xfs_trans_t *tp; xfs_inode_t *ip; xfs_buf_t *ialloc_context = NULL; - int code; - - tp = *tpp; - ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); + xfs_ino_t pino = dp ? dp->i_ino : 0; + xfs_ino_t ino; + int error; - /* - * xfs_ialloc will return a pointer to an incore inode if - * the Space Manager has an available inode on the free - * list. Otherwise, it will do an allocation and replenish - * the freelist. Since we can only do one allocation per - * transaction without deadlocks, we will need to commit the - * current transaction and start a new one. We will then - * need to call xfs_ialloc again to get the inode. - * - * If xfs_ialloc did an allocation to replenish the freelist, - * it returns the bp containing the head of the freelist as - * ialloc_context. We will hold a lock on it across the - * transaction commit so that no other process can steal - * the inode(s) that we've just allocated. - */ - code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, &ialloc_context, - &ip); + ASSERT((*tpp)->t_flags & XFS_TRANS_PERM_LOG_RES); + *ipp = NULL; /* - * Return an error if we were unable to allocate a new inode. - * This should only happen if we run out of space on disk or - * encounter a disk error. + * Call the space management code to pick the on-disk inode to be + * allocated and replenish the freelist. Since we can only do one + * allocation per transaction without deadlocks, we will need to + * commit the current transaction and start a new one. + * If xfs_dialloc did an allocation to replenish the freelist, it + * returns the bp containing the head of the freelist as + * ialloc_context. We will hold a lock on it across the transaction + * commit so that no other process can steal the inode(s) that we've + * just allocated. */ - if (code) { - *ipp = NULL; - return code; - } - if (!ialloc_context && !ip) { - *ipp = NULL; - return -ENOSPC; - } + error = xfs_dialloc(*tpp, pino, mode, &ialloc_context, &ino); + if (error) + return error; /* * If the AGI buffer is non-NULL, then we were unable to get an * inode in one operation. We need to commit the current - * transaction and call xfs_ialloc() again. It is guaranteed + * transaction and call xfs_dialloc() again. It is guaranteed * to succeed the second time. */ if (ialloc_context) { - code = xfs_dialloc_roll(&tp, ialloc_context); - if (code) { - *tpp = tp; - *ipp = NULL; - return code; - } - - /* - * Call ialloc again. Since we've locked out all - * other allocations in this allocation group, - * this call should always succeed. - */ - code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, - &ialloc_context, &ip); - + error = xfs_dialloc_roll(tpp, ialloc_context); + if (error) + return error; /* - * If we get an error at this point, return to the caller - * so that the current transaction can be aborted. + * Call dialloc again. Since we've locked out all other + * allocations in this allocation group, this call should + * always succeed. */ - if (code) { - *tpp = tp; - *ipp = NULL; - return code; - } - ASSERT(!ialloc_context && ip); + error = xfs_dialloc(*tpp, pino, mode, &ialloc_context, &ino); + if (error) + return error; + ASSERT(!ialloc_context); } - *ipp = ip; - *tpp = tp; + if (ino == NULLFSINO) + return -ENOSPC; + /* Initialise the newly allocated inode. */ + ip = xfs_dir_ialloc_init(*tpp, dp, ino, mode, nlink, rdev, prid); + if (IS_ERR(ip)) + return PTR_ERR(ip); + *ipp = ip; return 0; }