iget: stop EFS from using iget() and read_inode()

Stop the EFS filesystem from using iget() and read_inode().  Replace
efs_read_inode() with efs_iget(), and call that instead of iget().  efs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.

efs_fill_super() returns any error incurred when getting the root inode
instead of EACCES.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 17 insertions, 8 deletions

diff --git a/fs/efs/inode.c b/fs/efs/inode.c
index 174696f9bf14..627c3026946d 100644
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -45,17 +45,26 @@ static inline void extent_copy(efs_extent *src, efs_extent *dst) {
 	return;
 }
 
-void efs_read_inode(struct inode *inode)
+struct inode *efs_iget(struct super_block *super, unsigned long ino)
 {
 	int i, inode_index;
 	dev_t device;
 	u32 rdev;
 	struct buffer_head *bh;
-	struct efs_sb_info    *sb = SUPER_INFO(inode->i_sb);
-	struct efs_inode_info *in = INODE_INFO(inode);
+	struct efs_sb_info    *sb = SUPER_INFO(super);
+	struct efs_inode_info *in;
 	efs_block_t block, offset;
 	struct efs_dinode *efs_inode;
-  
+	struct inode *inode;
+
+	inode = iget_locked(super, ino);
+	if (IS_ERR(inode))
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+	in = INODE_INFO(inode);
+
 	/*
 	** EFS layout:
 	**
@@ -159,13 +168,13 @@ void efs_read_inode(struct inode *inode)
 			break;
 	}
 
-	return;
+	unlock_new_inode(inode);
+	return inode;
         
 read_inode_error:
 	printk(KERN_WARNING "EFS: failed to read inode %lu\n", inode->i_ino);
-	make_bad_inode(inode);
-
-	return;
+	iget_failed(inode);
+	return ERR_PTR(-EIO);
 }
 
 static inline efs_block_t