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Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 15/30] IGET: Stop FreeVXFS 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 14:10:38 +0100 Message-ID: <20071001131038.29339.93719.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 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5769 Lines: 190 Stop the FreeVXFS filesystem from using iget() and read_inode(). Replace vxfs_read_inode() with vxfs_iget(), and call that instead of iget(). vxfs_iget() then uses iget_locked() directly and returns a proper error code instead of an inode in the event of an error. vxfs_fill_super() returns any error incurred when getting the root inode instead of EINVAL. Signed-off-by: David Howells --- fs/freevxfs/vxfs_extern.h | 2 +- fs/freevxfs/vxfs_inode.c | 45 +++++++++++++++++++++++++++++---------------- fs/freevxfs/vxfs_lookup.c | 6 +++--- fs/freevxfs/vxfs_super.c | 10 +++++++--- 4 files changed, 40 insertions(+), 23 deletions(-) diff --git a/fs/freevxfs/vxfs_extern.h b/fs/freevxfs/vxfs_extern.h index 91ccee8..f307694 100644 --- a/fs/freevxfs/vxfs_extern.h +++ b/fs/freevxfs/vxfs_extern.h @@ -58,7 +58,7 @@ extern struct inode * vxfs_get_fake_inode(struct super_block *, extern void vxfs_put_fake_inode(struct inode *); extern struct vxfs_inode_info * vxfs_blkiget(struct super_block *, u_long, ino_t); extern struct vxfs_inode_info * vxfs_stiget(struct super_block *, ino_t); -extern void vxfs_read_inode(struct inode *); +extern struct inode * vxfs_iget(struct super_block *, unsigned long); extern void vxfs_clear_inode(struct inode *); /* vxfs_lookup.c */ diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c index d1f7c5b..aefda0e 100644 --- a/fs/freevxfs/vxfs_inode.c +++ b/fs/freevxfs/vxfs_inode.c @@ -129,7 +129,7 @@ fail: * Description: * Search the for inode number @ino in the filesystem * described by @sbp. Use the specified inode table (@ilistp). - * Returns the matching VxFS inode on success, else a NULL pointer. + * Returns the matching VxFS inode on success, else an error code. */ static struct vxfs_inode_info * __vxfs_iget(ino_t ino, struct inode *ilistp) @@ -157,12 +157,12 @@ __vxfs_iget(ino_t ino, struct inode *ilistp) } printk(KERN_WARNING "vxfs: error on page %p\n", pp); - return NULL; + return ERR_PTR(PTR_ERR(pp)); fail: printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino); vxfs_put_page(pp); - return NULL; + return ERR_PTR(-ENOMEM); } /** @@ -178,7 +178,10 @@ fail: struct vxfs_inode_info * vxfs_stiget(struct super_block *sbp, ino_t ino) { - return __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist); + struct vxfs_inode_info *vip; + + vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist); + return IS_ERR(vip) ? NULL : vip; } /** @@ -282,23 +285,32 @@ vxfs_put_fake_inode(struct inode *ip) } /** - * vxfs_read_inode - fill in inode information - * @ip: inode pointer to fill + * vxfs_iget - get an inode + * @sbp: the superblock to get the inode for + * @ino: the number of the inode to get * * Description: - * vxfs_read_inode reads the disk inode for @ip and fills - * in all relevant fields in @ip. + * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills + * in all relevant fields in the new inode. */ -void -vxfs_read_inode(struct inode *ip) +struct inode * +vxfs_iget(struct super_block *sbp, ino_t ino) { - struct super_block *sbp = ip->i_sb; struct vxfs_inode_info *vip; const struct address_space_operations *aops; - ino_t ino = ip->i_ino; - - if (!(vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist))) - return; + struct inode *ip; + + ip = iget_locked(sbp, ino); + if (!ip) + return ERR_PTR(-ENOMEM); + if (!(ip->i_state & I_NEW)) + return ip; + + vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist); + if (IS_ERR(vip)) { + iget_failed(ip); + return ERR_PTR(PTR_ERR(vip)); + } vxfs_iinit(ip, vip); @@ -323,7 +335,8 @@ vxfs_read_inode(struct inode *ip) } else init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev)); - return; + unlock_new_inode(ip); + return ip; } /** diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c index bf86e54..5e08418 100644 --- a/fs/freevxfs/vxfs_lookup.c +++ b/fs/freevxfs/vxfs_lookup.c @@ -213,10 +213,10 @@ vxfs_lookup(struct inode *dip, struct dentry *dp, struct nameidata *nd) lock_kernel(); ino = vxfs_inode_by_name(dip, dp); if (ino) { - ip = iget(dip->i_sb, ino); - if (!ip) { + ip = vxfs_iget(dip->i_sb, ino); + if (IS_ERR(ip)) { unlock_kernel(); - return ERR_PTR(-EACCES); + return ERR_PTR(PTR_ERR(ip)); } } unlock_kernel(); diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c index 4f95572..1dacda8 100644 --- a/fs/freevxfs/vxfs_super.c +++ b/fs/freevxfs/vxfs_super.c @@ -60,7 +60,6 @@ static int vxfs_statfs(struct dentry *, struct kstatfs *); static int vxfs_remount(struct super_block *, int *, char *); static const struct super_operations vxfs_super_ops = { - .read_inode = vxfs_read_inode, .clear_inode = vxfs_clear_inode, .put_super = vxfs_put_super, .statfs = vxfs_statfs, @@ -153,6 +152,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) struct buffer_head *bp = NULL; u_long bsize; struct inode *root; + int ret = -EINVAL; sbp->s_flags |= MS_RDONLY; @@ -219,7 +219,11 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) } sbp->s_op = &vxfs_super_ops; - root = iget(sbp, VXFS_ROOT_INO); + root = vxfs_iget(sbp, VXFS_ROOT_INO); + if (IS_ERR(root)) { + ret = PTR_ERR(root); + goto out; + } sbp->s_root = d_alloc_root(root); if (!sbp->s_root) { iput(root); @@ -236,7 +240,7 @@ out_free_ilist: out: brelse(bp); kfree(infp); - return -EINVAL; + return ret; } /* - 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/