GFS2: Clean up of extended attribute support

This has been on my list for some time. We need to change the way
in which we handle extended attributes to allow faster file creation
times (by reducing the number of transactions required) and the
extended attribute code is the main obstacle to this.

In addition to that, the VFS provides a way to demultiplex the xattr
calls which we ought to be using, rather than rolling our own. This
patch changes the GFS2 code to use that VFS feature and as a result
the code shrinks by a couple of hundred lines or so, and becomes
easier to read.

I'm planning on doing further clean up work in this area, but this
patch is a good start. The cleaned up code also uses the more usual
"xattr" shorthand, I plan to eliminate the use of "eattr" eventually
and in the mean time it serves as a flag as to which bits of the code
have been updated.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 0 insertions, 157 deletions

diff --git a/fs/gfs2/eaops.c b/fs/gfs2/eaops.c
deleted file mode 100644
index dee9b03e5b3..00000000000
--- a/fs/gfs2/eaops.c
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/capability.h>
-#include <linux/xattr.h>
-#include <linux/gfs2_ondisk.h>
-#include <asm/uaccess.h>
-
-#include "gfs2.h"
-#include "incore.h"
-#include "acl.h"
-#include "eaops.h"
-#include "eattr.h"
-#include "util.h"
-
-/**
- * gfs2_ea_name2type - get the type of the ea, and truncate type from the name
- * @namep: ea name, possibly with type appended
- *
- * Returns: GFS2_EATYPE_XXX
- */
-
-unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name)
-{
-	unsigned int type;
-
-	if (strncmp(name, "system.", 7) == 0) {
-		type = GFS2_EATYPE_SYS;
-		if (truncated_name)
-			*truncated_name = name + sizeof("system.") - 1;
-	} else if (strncmp(name, "user.", 5) == 0) {
-		type = GFS2_EATYPE_USR;
-		if (truncated_name)
-			*truncated_name = name + sizeof("user.") - 1;
-	} else if (strncmp(name, "security.", 9) == 0) {
-		type = GFS2_EATYPE_SECURITY;
-		if (truncated_name)
-			*truncated_name = name + sizeof("security.") - 1;
-	} else {
-		type = GFS2_EATYPE_UNUSED;
-		if (truncated_name)
-			*truncated_name = NULL;
-	}
-
-	return type;
-}
-
-static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
-{
-	if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
-	    !GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
-	    !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl == 0 &&
-	    (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
-	     GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
-		return -EOPNOTSUPP;
-
-	return gfs2_ea_get_i(ip, er);
-}
-
-static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
-{
-	int remove = 0;
-	int error;
-
-	if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
-		if (!(er->er_flags & GFS2_ERF_MODE)) {
-			er->er_mode = ip->i_inode.i_mode;
-			er->er_flags |= GFS2_ERF_MODE;
-		}
-		error = gfs2_acl_validate_set(ip, 1, er,
-					      &remove, &er->er_mode);
-		if (error)
-			return error;
-		error = gfs2_ea_set_i(ip, er);
-		if (error)
-			return error;
-		if (remove)
-			gfs2_ea_remove_i(ip, er);
-		return 0;
-
-	} else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
-		error = gfs2_acl_validate_set(ip, 0, er,
-					      &remove, NULL);
-		if (error)
-			return error;
-		if (!remove)
-			error = gfs2_ea_set_i(ip, er);
-		else {
-			error = gfs2_ea_remove_i(ip, er);
-			if (error == -ENODATA)
-				error = 0;
-		}
-		return error;
-	}
-
-	return -EPERM;
-}
-
-static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
-{
-	if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
-		int error = gfs2_acl_validate_remove(ip, 1);
-		if (error)
-			return error;
-
-	} else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
-		int error = gfs2_acl_validate_remove(ip, 0);
-		if (error)
-			return error;
-
-	} else
-		return -EPERM;
-
-	return gfs2_ea_remove_i(ip, er);
-}
-
-static const struct gfs2_eattr_operations gfs2_user_eaops = {
-	.eo_get = gfs2_ea_get_i,
-	.eo_set = gfs2_ea_set_i,
-	.eo_remove = gfs2_ea_remove_i,
-	.eo_name = "user",
-};
-
-const struct gfs2_eattr_operations gfs2_system_eaops = {
-	.eo_get = system_eo_get,
-	.eo_set = system_eo_set,
-	.eo_remove = system_eo_remove,
-	.eo_name = "system",
-};
-
-static const struct gfs2_eattr_operations gfs2_security_eaops = {
-	.eo_get = gfs2_ea_get_i,
-	.eo_set = gfs2_ea_set_i,
-	.eo_remove = gfs2_ea_remove_i,
-	.eo_name = "security",
-};
-
-const struct gfs2_eattr_operations *gfs2_ea_ops[] = {
-	NULL,
-	&gfs2_user_eaops,
-	&gfs2_system_eaops,
-	&gfs2_security_eaops,
-};
-