[PATCH 1/4] fs/unionfs/: Remove stale_inode.c

["Josef 'Jeff' Sipek" <jsipek@cs.sunysb.edu>]

The stale inode operations were heavily based on bad inode operations. This
patch removes stale_inode.c and converts all users of stale_inode_ops to
bad_inode_ops as there seems to be no reason to return ESTALE instead of
EIO.

This is the more appropriate than porting the bad_inode.c fix (commit
be6aab0e9fa6d3c6d75aa1e38ac972d8b4ee82b8) to stale_inode.c.

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
---
 fs/unionfs/dentry.c      |    2 +-
 fs/unionfs/stale_inode.c |  112 ----------------------------------------------
 fs/unionfs/union.h       |    1 -
 3 files changed, 1 insertions(+), 114 deletions(-)
 delete mode 100644 fs/unionfs/stale_inode.c

diff --git a/fs/unionfs/dentry.c b/fs/unionfs/dentry.c
index 78de9c9..0b002d1 100644
--- a/fs/unionfs/dentry.c
+++ b/fs/unionfs/dentry.c
@@ -141,7 +141,7 @@ restart:
 		}
 
 		if (positive && UNIONFS_I(dentry->d_inode)->stale) {
-			make_stale_inode(dentry->d_inode);
+			make_bad_inode(dentry->d_inode);
 			d_drop(dentry);
 			valid = 0;
 			goto out;
diff --git a/fs/unionfs/stale_inode.c b/fs/unionfs/stale_inode.c
deleted file mode 100644
index bce938d..0000000
--- a/fs/unionfs/stale_inode.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- *  Adpated from linux/fs/bad_inode.c
- *
- *  Copyright (C) 1997, Stephen Tweedie
- *
- *  Provide stub functions for "stale" inodes, a bit friendlier than the
- *  -EIO that bad_inode.c does.
- */
-
-#include <linux/version.h>
-
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <linux/sched.h>
-
-static struct address_space_operations unionfs_stale_aops;
-
-/* declarations for "sparse */
-extern struct inode_operations stale_inode_ops;
-
-/*
- * The follow_link operation is special: it must behave as a no-op
- * so that a stale root inode can at least be unmounted. To do this
- * we must dput() the base and return the dentry with a dget().
- */
-static void *stale_follow_link(struct dentry *dent, struct nameidata *nd)
-{
-	return ERR_PTR(vfs_follow_link(nd, ERR_PTR(-ESTALE)));
-}
-
-static int return_ESTALE(void)
-{
-	return -ESTALE;
-}
-
-#define ESTALE_ERROR ((void *) (return_ESTALE))
-
-static struct file_operations stale_file_ops = {
-	.llseek		= ESTALE_ERROR,
-	.read		= ESTALE_ERROR,
-	.write		= ESTALE_ERROR,
-	.readdir	= ESTALE_ERROR,
-	.poll		= ESTALE_ERROR,
-	.ioctl		= ESTALE_ERROR,
-	.mmap		= ESTALE_ERROR,
-	.open		= ESTALE_ERROR,
-	.flush		= ESTALE_ERROR,
-	.release	= ESTALE_ERROR,
-	.fsync		= ESTALE_ERROR,
-	.fasync		= ESTALE_ERROR,
-	.lock		= ESTALE_ERROR,
-};
-
-struct inode_operations stale_inode_ops = {
-	.create		= ESTALE_ERROR,
-	.lookup		= ESTALE_ERROR,
-	.link		= ESTALE_ERROR,
-	.unlink		= ESTALE_ERROR,
-	.symlink	= ESTALE_ERROR,
-	.mkdir		= ESTALE_ERROR,
-	.rmdir		= ESTALE_ERROR,
-	.mknod		= ESTALE_ERROR,
-	.rename		= ESTALE_ERROR,
-	.readlink	= ESTALE_ERROR,
-	.follow_link	= stale_follow_link,
-	.truncate	= ESTALE_ERROR,
-	.permission	= ESTALE_ERROR,
-};
-
-/*
- * When a filesystem is unable to read an inode due to an I/O error in
- * its read_inode() function, it can call make_stale_inode() to return a
- * set of stubs which will return ESTALE errors as required.
- *
- * We only need to do limited initialisation: all other fields are
- * preinitialised to zero automatically.
- */
-
-/**
- * make_stale_inode - mark an inode stale due to an I/O error
- * @inode: Inode to mark stale
- *
- * When an inode cannot be read due to a media or remote network
- * failure this function makes the inode "stale" and causes I/O operations
- * on it to fail from this point on.
- */
-void make_stale_inode(struct inode *inode)
-{
-	inode->i_mode = S_IFREG;
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-	inode->i_op = &stale_inode_ops;
-	inode->i_fop = &stale_file_ops;
-	inode->i_mapping->a_ops = &unionfs_stale_aops;
-}
-
-/*
- * This tests whether an inode has been flagged as stale. The test uses
- * &stale_inode_ops to cover the case of invalidated inodes as well as
- * those created by make_stale_inode() above.
- */
-
-/**
- * is_stale_inode - is an inode errored
- * @inode: inode to test
- *
- * Returns true if the inode in question has been marked as stale.
- */
-int is_stale_inode(struct inode *inode)
-{
-	return (inode->i_op == &stale_inode_ops);
-}
-
diff --git a/fs/unionfs/union.h b/fs/unionfs/union.h
index b6e03ff..637f9f0 100644
--- a/fs/unionfs/union.h
+++ b/fs/unionfs/union.h
@@ -396,7 +396,6 @@ static inline int unionfs_get_nlinks(struct inode *inode)
 
 struct dentry *unionfs_lookup_backend(struct dentry *dentry, struct nameidata *nd, int lookupmode);
 int is_stale_inode(struct inode *inode);
-void make_stale_inode(struct inode *inode);
 
 #define IS_SET(sb, check_flag) ((check_flag) & MOUNT_FLAG(sb))
 
-- 
1.5.0.rc1.g5355