Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758827AbXJJVx0 (ORCPT ); Wed, 10 Oct 2007 17:53:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756841AbXJJVpo (ORCPT ); Wed, 10 Oct 2007 17:45:44 -0400 Received: from mx1.redhat.com ([66.187.233.31]:34293 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757376AbXJJVpi (ORCPT ); Wed, 10 Oct 2007 17:45:38 -0400 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 From: David Howells Subject: [PATCH 25/31] IGET: Stop ROMFS from using iget() and read_inode() [try #3] 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: Wed, 10 Oct 2007 22:45:15 +0100 Message-ID: <20071010214515.17535.87359.stgit@warthog.procyon.org.uk> In-Reply-To: <20071010214308.17535.5406.stgit@warthog.procyon.org.uk> References: <20071010214308.17535.5406.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 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3947 Lines: 142 Stop the ROMFS filesystem from using iget() and read_inode(). Replace romfs_read_inode() with romfs_iget(), and call that instead of iget(). romfs_iget() then uses iget_locked() directly and returns a proper error code instead of an inode in the event of an error. romfs_fill_super() returns any error incurred when getting the root inode instead of EINVAL. Signed-off-by: David Howells --- fs/romfs/inode.c | 45 +++++++++++++++++++++++++++++++-------------- 1 files changed, 31 insertions(+), 14 deletions(-) diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c index dae7945..5071c9a 100644 --- a/fs/romfs/inode.c +++ b/fs/romfs/inode.c @@ -84,6 +84,8 @@ struct romfs_inode_info { struct inode vfs_inode; }; +static struct inode *romfs_iget(struct super_block *, unsigned long); + /* instead of private superblock data */ static inline unsigned long romfs_maxsize(struct super_block *sb) { @@ -117,7 +119,7 @@ static int romfs_fill_super(struct super_block *s, void *data, int silent) struct buffer_head *bh; struct romfs_super_block *rsb; struct inode *root; - int sz; + int sz, ret = -EINVAL; /* I would parse the options here, but there are none.. :) */ @@ -157,10 +159,13 @@ static int romfs_fill_super(struct super_block *s, void *data, int silent) & ROMFH_MASK; s->s_op = &romfs_ops; - root = iget(s, sz); - if (!root) + root = romfs_iget(s, sz); + if (IS_ERR(root)) { + ret = PTR_ERR(root); goto out; + } + ret = -ENOMEM; s->s_root = d_alloc_root(root); if (!s->s_root) goto outiput; @@ -173,7 +178,7 @@ outiput: out: brelse(bh); outnobh: - return -EINVAL; + return ret; } /* That's simple too. */ @@ -389,8 +394,11 @@ romfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) if ((be32_to_cpu(ri.next) & ROMFH_TYPE) == ROMFH_HRD) offset = be32_to_cpu(ri.spec) & ROMFH_MASK; - if ((inode = iget(dir->i_sb, offset))) - goto outi; + inode = romfs_iget(dir->i_sb, offset); + if (IS_ERR(inode)) { + res = PTR_ERR(inode); + goto out; + } /* * it's a bit funky, _lookup needs to return an error code @@ -402,7 +410,7 @@ romfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) */ out0: inode = NULL; -outi: res = 0; + res = 0; d_add (dentry, inode); out: unlock_kernel(); @@ -478,20 +486,28 @@ static mode_t romfs_modemap[] = S_IFBLK+0600, S_IFCHR+0600, S_IFSOCK+0644, S_IFIFO+0644 }; -static void -romfs_read_inode(struct inode *i) +static struct inode * +romfs_iget(struct super_block *sb, unsigned long ino) { - int nextfh, ino; + int nextfh; struct romfs_inode ri; + struct inode *i; + + ino &= ROMFH_MASK; + i = iget_locked(sb, ino); + if (!i) + return ERR_PTR(-ENOMEM); + if (!(i->i_state & I_NEW)) + return i; - ino = i->i_ino & ROMFH_MASK; i->i_mode = 0; /* Loop for finding the real hard link */ for(;;) { if (romfs_copyfrom(i, &ri, ino, ROMFH_SIZE) <= 0) { - printk("romfs: read error for inode 0x%x\n", ino); - return; + printk("romfs: read error for inode 0x%lx\n", ino); + iget_failed(i); + return ERR_PTR(-EIO); } /* XXX: do romfs_checksum here too (with name) */ @@ -548,6 +564,8 @@ romfs_read_inode(struct inode *i) init_special_inode(i, ino, MKDEV(nextfh>>16,nextfh&0xffff)); } + unlock_new_inode(i); + return i; } static struct kmem_cache * romfs_inode_cachep; @@ -599,7 +617,6 @@ static int romfs_remount(struct super_block *sb, int *flags, char *data) static const struct super_operations romfs_ops = { .alloc_inode = romfs_alloc_inode, .destroy_inode = romfs_destroy_inode, - .read_inode = romfs_read_inode, .statfs = romfs_statfs, .remount_fs = romfs_remount, }; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/