From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1IcNnD-0005F4-A0 for user-mode-linux-devel@lists.sourceforge.net; Mon, 01 Oct 2007 09:06:47 -0700 Received: from mx1.redhat.com ([66.187.233.31]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1IcNnC-0008NR-PK for user-mode-linux-devel@lists.sourceforge.net; Mon, 01 Oct 2007 09:06:47 -0700 Date: Mon, 1 Oct 2007 12:06:32 -0400 From: dhowells@redhat.com Message-Id: <200710011606.l91G6W9E028542@pobox.devel.redhat.com> Subject: [uml-devel] (no subject) List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: >From dhowells Mon Oct 1 14: 11:59 2007 Return-Path: Received: from localhost.localdomain [127.0.0.1] by warthog.procyon.org.uk with IMAP (fetchmail-6.3.7) for (single-drop); Mon, 01 Oct 2007 14:11:59 +0100 (BST) Received: from pobox.devel.redhat.com ([unix socket]) by pobox.devel.redhat.com (Cyrus v2.2.12-Invoca-RPM-2.2.12-8.1.RHEL4) with LMTPA; Mon, 01 Oct 2007 09:11:50 -0400 X-Sieve: CMU Sieve 2.2 Received: from warthog.cambridge.redhat.com (devserv.devel.redhat.com [10.10.36.72]) by pobox.devel.redhat.com (8.13.1/8.13.1) with ESMTP id l91DBnVD031197; Mon, 1 Oct 2007 09:11:49 -0400 Received: from [127.0.0.1] (helo=warthog.procyon.org.uk) by warthog.cambridge.redhat.com with esmtp (Exim 4.66 #1 (Red Hat Linux)) id 1IcL3u-0007i8-3r; Mon, 01 Oct 2007 14:11:50 +0100 Organization: Red Hat UK Ltd. 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Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 29/30] IGET: Stop HPPFS from using iget() and read_inode() To: hch@infradead.org, viro@ftp.linux.org.uk, torvalds@osdl.org, akpm@osdl.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, dhowells@redhat.com Date: Mon, 01 Oct 2007 14:11:50 +0100 Message-ID: <20071001131150.29339.92417.stgit@warthog.procyon.org.uk> In-Reply-To: <20071001130921.29339.72876.stgit@warthog.procyon.org.uk> References: <20071001130921.29339.72876.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.13 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Resent-To: user-mode-linux-devel@lists.sourceforge.net Resent-cc: jdike@karaya.com Resent-Date: Mon, 01 Oct 2007 17:06:33 +0100 Resent-Message-ID: <19196.1191254793@redhat.com> Resent-From: David Howells Stop the HPPFS filesystem from using iget() and read_inode(). Provide an hppfs_iget(), and call that instead of iget(). hppfs_iget() then uses iget_locked() directly and returns a proper error code instead of an inode in the event of an error. hppfs_fill_sb_common() returns any error incurred when getting the root inode instead of EINVAL. Note that the contents of hppfs_kern.c need to be examined: (*) The HPPFS inode retains a pointer to the proc dentry it is shadowing, but whilst it does appear to retain a reference to it, it doesn't appear to destroy the reference if the inode goes away. (*) hppfs_iget() should perhaps subsume init_inode() and hppfs_read_inode(). (*) It would appear that all hppfs inodes are the same inode because iget() was being called with inode number 0, which forms the lookup key. Signed-off-by: David Howells --- fs/hppfs/hppfs_kern.c | 27 ++++++++++++++++++++++----- 1 files changed, 22 insertions(+), 5 deletions(-) diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c index affb741..a1e1f0f 100644 --- a/fs/hppfs/hppfs_kern.c +++ b/fs/hppfs/hppfs_kern.c @@ -155,6 +155,20 @@ static void hppfs_read_inode(struct inode *ino) ino->i_blocks = proc_ino->i_blocks; } +static struct inode *hppfs_iget(struct super_block *sb) +{ + struct inode *inode; + + inode = iget_locked(sb, 0); + if (!inode) + return ERR_PTR(-ENOMEM); + if (inode->i_state & I_NEW) { + hppfs_read_inode(inode); + unlock_new_inode(inode); + } + return inode; +} + static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry, struct nameidata *nd) { @@ -190,9 +204,11 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry, if(IS_ERR(proc_dentry)) return(proc_dentry); - inode = iget(ino->i_sb, 0); - if(inode == NULL) + inode = hppfs_iget(ino->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); goto out_dput; + } err = init_inode(inode, proc_dentry); if(err) @@ -652,7 +668,6 @@ static void hppfs_destroy_inode(struct inode *inode) static const struct super_operations hppfs_sbops = { .alloc_inode = hppfs_alloc_inode, .destroy_inode = hppfs_destroy_inode, - .read_inode = hppfs_read_inode, .delete_inode = hppfs_delete_inode, .statfs = hppfs_statfs, }; @@ -745,9 +760,11 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent) sb->s_magic = HPPFS_SUPER_MAGIC; sb->s_op = &hppfs_sbops; - root_inode = iget(sb, 0); - if(root_inode == NULL) + root_inode = hppfs_iget(sb); + if (IS_ERR(root_inode)) { + err = PTR_ERR(root_inode); goto out; + } err = init_inode(root_inode, proc_sb->s_root); if(err) ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. 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