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>

fs/gfs2/Makefile

 EXTRA_CFLAGS := -I$(src)
 obj-$(CONFIG_GFS2_FS) += gfs2.o
-gfs2-y := acl.o bmap.o dir.o eaops.o eattr.o glock.o \
+gfs2-y := acl.o bmap.o dir.o eattr.o glock.o \
 	glops.o inode.o log.o lops.o main.o meta_io.o \
 	aops.o dentry.o export.o file.o \
 	ops_fstype.o ops_inode.o quota.o \

fs/gfs2/acl.c

@@ -19,7 +19,6 @@
 #include "gfs2.h"
 #include "incore.h"
 #include "acl.h"
-#include "eaops.h"
 #include "eattr.h"
 #include "glock.h"
 #include "inode.h"
@@ -31,8 +30,7 @@
 #define ACL_DEFAULT 0
 
 int gfs2_acl_validate_set(struct gfs2_inode *ip, int access,
-		      struct gfs2_ea_request *er,
-		      int *remove, mode_t *mode)
+			  struct gfs2_ea_request *er, int *remove, mode_t *mode)
 {
 	struct posix_acl *acl;
 	int error;
@@ -83,30 +81,20 @@ int gfs2_acl_validate_remove(struct gfs2_inode *ip, int access)
 	return 0;
 }
 
-static int acl_get(struct gfs2_inode *ip, int access, struct posix_acl **acl,
-		   struct gfs2_ea_location *el, char **data, unsigned int *len)
+static int acl_get(struct gfs2_inode *ip, const char *name,
+		   struct posix_acl **acl, struct gfs2_ea_location *el,
+		   char **datap, unsigned int *lenp)
 {
-	struct gfs2_ea_request er;
-	struct gfs2_ea_location el_this;
+	char *data;
+	unsigned int len;
 	int error;
 
+	el->el_bh = NULL;
+
 	if (!ip->i_eattr)
 		return 0;
 
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	if (access) {
-		er.er_name = GFS2_POSIX_ACL_ACCESS;
-		er.er_name_len = GFS2_POSIX_ACL_ACCESS_LEN;
-	} else {
-		er.er_name = GFS2_POSIX_ACL_DEFAULT;
-		er.er_name_len = GFS2_POSIX_ACL_DEFAULT_LEN;
-	}
-	er.er_type = GFS2_EATYPE_SYS;
-
-	if (!el)
-		el = &el_this;
-
-	error = gfs2_ea_find(ip, &er, el);
+	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, el);
 	if (error)
 		return error;
 	if (!el->el_ea)
@@ -114,32 +102,31 @@ static int acl_get(struct gfs2_inode *ip, int access, struct posix_acl **acl,
 	if (!GFS2_EA_DATA_LEN(el->el_ea))
 		goto out;
 
-	er.er_data_len = GFS2_EA_DATA_LEN(el->el_ea);
-	er.er_data = kmalloc(er.er_data_len, GFP_NOFS);
+	len = GFS2_EA_DATA_LEN(el->el_ea);
+	data = kmalloc(len, GFP_NOFS);
 	error = -ENOMEM;
-	if (!er.er_data)
+	if (!data)
 		goto out;
 
-	error = gfs2_ea_get_copy(ip, el, er.er_data);
-	if (error)
+	error = gfs2_ea_get_copy(ip, el, data, len);
+	if (error < 0)
 		goto out_kfree;
+	error = 0;
 
 	if (acl) {
-		*acl = posix_acl_from_xattr(er.er_data, er.er_data_len);
+		*acl = posix_acl_from_xattr(data, len);
 		if (IS_ERR(*acl))
 			error = PTR_ERR(*acl);
 	}
 
 out_kfree:
-	if (error || !data)
-		kfree(er.er_data);
-	else {
-		*data = er.er_data;
-		*len = er.er_data_len;
+	if (error || !datap) {
+		kfree(data);
+	} else {
+		*datap = data;
+		*lenp = len;
 	}
 out:
-	if (error || el == &el_this)
-		brelse(el->el_bh);
 	return error;
 }
 
@@ -153,10 +140,12 @@ out:
 
 int gfs2_check_acl(struct inode *inode, int mask)
 {
+	struct gfs2_ea_location el;
 	struct posix_acl *acl = NULL;
 	int error;
 
-	error = acl_get(GFS2_I(inode), ACL_ACCESS, &acl, NULL, NULL, NULL);
+	error = acl_get(GFS2_I(inode), GFS2_POSIX_ACL_ACCESS, &acl, &el, NULL, NULL);
+	brelse(el.el_bh);
 	if (error)
 		return error;
 
@@ -196,10 +185,12 @@ static int munge_mode(struct gfs2_inode *ip, mode_t mode)
 
 int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
 {
+	struct gfs2_ea_location el;
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	struct posix_acl *acl = NULL, *clone;
-	struct gfs2_ea_request er;
 	mode_t mode = ip->i_inode.i_mode;
+	char *data = NULL;
+	unsigned int len;
 	int error;
 
 	if (!sdp->sd_args.ar_posix_acl)
@@ -207,11 +198,8 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
 	if (S_ISLNK(ip->i_inode.i_mode))
 		return 0;
 
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	er.er_type = GFS2_EATYPE_SYS;
-
-	error = acl_get(dip, ACL_DEFAULT, &acl, NULL,
-			&er.er_data, &er.er_data_len);
+	error = acl_get(dip, GFS2_POSIX_ACL_DEFAULT, &acl, &el, &data, &len);
+	brelse(el.el_bh);
 	if (error)
 		return error;
 	if (!acl) {
@@ -229,9 +217,8 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
 	acl = clone;
 
 	if (S_ISDIR(ip->i_inode.i_mode)) {
-		er.er_name = GFS2_POSIX_ACL_DEFAULT;
-		er.er_name_len = GFS2_POSIX_ACL_DEFAULT_LEN;
-		error = gfs2_system_eaops.eo_set(ip, &er);
+		error = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SYS,
+				       GFS2_POSIX_ACL_DEFAULT, data, len, 0);
 		if (error)
 			goto out;
 	}
@@ -239,21 +226,19 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
 	error = posix_acl_create_masq(acl, &mode);
 	if (error < 0)
 		goto out;
-	if (error > 0) {
-		er.er_name = GFS2_POSIX_ACL_ACCESS;
-		er.er_name_len = GFS2_POSIX_ACL_ACCESS_LEN;
-		posix_acl_to_xattr(acl, er.er_data, er.er_data_len);
-		er.er_mode = mode;
-		er.er_flags = GFS2_ERF_MODE;
-		error = gfs2_system_eaops.eo_set(ip, &er);
-		if (error)
-			goto out;
-	} else
-		munge_mode(ip, mode);
+	if (error == 0)
+		goto munge;
 
+	posix_acl_to_xattr(acl, data, len);
+	error = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SYS,
+			       GFS2_POSIX_ACL_ACCESS, data, len, 0);
+	if (error)
+		goto out;
+munge:
+	error = munge_mode(ip, mode);
 out:
 	posix_acl_release(acl);
-	kfree(er.er_data);
+	kfree(data);
 	return error;
 }
 
@@ -265,9 +250,9 @@ int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
 	unsigned int len;
 	int error;
 
-	error = acl_get(ip, ACL_ACCESS, &acl, &el, &data, &len);
+	error = acl_get(ip, GFS2_POSIX_ACL_ACCESS, &acl, &el, &data, &len);
 	if (error)
-		return error;
+		goto out_brelse;
 	if (!acl)
 		return gfs2_setattr_simple(ip, attr);
 
@@ -286,8 +271,9 @@ int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
 
 out:
 	posix_acl_release(acl);
-	brelse(el.el_bh);
 	kfree(data);
+out_brelse:
+	brelse(el.el_bh);
 	return error;
 }
 

fs/gfs2/eaops.c

-/*
- * 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,
-};
-

fs/gfs2/eaops.h

-/*
- * 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.
- */
-
-#ifndef __EAOPS_DOT_H__
-#define __EAOPS_DOT_H__
-
-struct gfs2_ea_request;
-struct gfs2_inode;
-
-struct gfs2_eattr_operations {
-	int (*eo_get) (struct gfs2_inode *ip, struct gfs2_ea_request *er);
-	int (*eo_set) (struct gfs2_inode *ip, struct gfs2_ea_request *er);
-	int (*eo_remove) (struct gfs2_inode *ip, struct gfs2_ea_request *er);
-	char *eo_name;
-};
-
-unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name);
-
-extern const struct gfs2_eattr_operations gfs2_system_eaops;
-
-extern const struct gfs2_eattr_operations *gfs2_ea_ops[];
-
-#endif /* __EAOPS_DOT_H__ */
-

fs/gfs2/eattr.h

@@ -27,10 +27,6 @@ ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
 #define GFS2_EAREQ_SIZE_STUFFED(er) \
 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
 
-#define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
-ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
-      sizeof(__be64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
-
 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
 
@@ -43,16 +39,12 @@ ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
 #define GFS2_EA_BH2FIRST(bh) \
 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
 
-#define GFS2_ERF_MODE 0x80000000
-
 struct gfs2_ea_request {
 	const char *er_name;
 	char *er_data;
 	unsigned int er_name_len;
 	unsigned int er_data_len;
 	unsigned int er_type; /* GFS2_EATYPE_... */
-	int er_flags;
-	mode_t er_mode;
 };
 
 struct gfs2_ea_location {
@@ -61,40 +53,20 @@ struct gfs2_ea_location {
 	struct gfs2_ea_header *el_prev;
 };
 
-int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-
-int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
-
-int gfs2_ea_dealloc(struct gfs2_inode *ip);
+extern int gfs2_xattr_get(struct inode *inode, int type, const char *name,
+			  void *buffer, size_t size);
+extern int gfs2_xattr_set(struct inode *inode, int type, const char *name,
+			  const void *value, size_t size, int flags);
+extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
+extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
 
 /* Exported to acl.c */
 
-int gfs2_ea_find(struct gfs2_inode *ip,
-		 struct gfs2_ea_request *er,
-		 struct gfs2_ea_location *el);
-int gfs2_ea_get_copy(struct gfs2_inode *ip,
-		     struct gfs2_ea_location *el,
-		     char *data);
-int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
-		      struct iattr *attr, char *data);
-
-static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
-{
-	switch (ea->ea_type) {
-	case GFS2_EATYPE_USR:
-		return 5 + ea->ea_name_len + 1;
-	case GFS2_EATYPE_SYS:
-		return 7 + ea->ea_name_len + 1;
-	case GFS2_EATYPE_SECURITY:
-		return 9 + ea->ea_name_len + 1;
-	default:
-		return 0;
-	}
-}
+extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
+			struct gfs2_ea_location *el);
+extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+			    char *data, size_t size);
+extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+			     struct iattr *attr, char *data);
 
 #endif /* __EATTR_DOT_H__ */

fs/gfs2/file.c

@@ -38,7 +38,6 @@
 #include "rgrp.h"
 #include "trans.h"
 #include "util.h"
-#include "eaops.h"
 
 /**
  * gfs2_llseek - seek to a location in a file

fs/gfs2/inode.c

@@ -924,7 +924,6 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
 	size_t len;
 	void *value;
 	char *name;
-	struct gfs2_ea_request er;
 
 	err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
 					   &name, &value, &len);
@@ -935,16 +934,7 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
 		return err;
 	}
 
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-
-	er.er_type = GFS2_EATYPE_SECURITY;
-	er.er_name = name;
-	er.er_data = value;
-	er.er_name_len = strlen(name);
-	er.er_data_len = len;
-
-	err = gfs2_ea_set_i(ip, &er);
-
+	err = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SECURITY, name, value, len, 0);
 	kfree(value);
 	kfree(name);
 

fs/gfs2/ops_fstype.c

@@ -1186,6 +1186,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_magic = GFS2_MAGIC;
 	sb->s_op = &gfs2_super_ops;
 	sb->s_export_op = &gfs2_export_ops;
+	sb->s_xattr = gfs2_xattr_handlers;
 	sb->s_time_gran = 1;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 

fs/gfs2/ops_inode.c

@@ -26,7 +26,6 @@
 #include "acl.h"
 #include "bmap.h"
 #include "dir.h"
-#include "eaops.h"
 #include "eattr.h"
 #include "glock.h"
 #include "inode.h"
@@ -1302,60 +1301,53 @@ static int gfs2_setxattr(struct dentry *dentry, const char *name,
 			 const void *data, size_t size, int flags)
 {
 	struct inode *inode = dentry->d_inode;
-	struct gfs2_ea_request er;
-
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	er.er_type = gfs2_ea_name2type(name, &er.er_name);
-	if (er.er_type == GFS2_EATYPE_UNUSED)
-		return -EOPNOTSUPP;
-	er.er_data = (char *)data;
-	er.er_name_len = strlen(er.er_name);
-	er.er_data_len = size;
-	er.er_flags = flags;
-
-	gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE));
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	int ret;
 
-	return gfs2_ea_set(GFS2_I(inode), &er);
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+	ret = gfs2_glock_nq(&gh);
+	if (ret == 0) {
+		ret = generic_setxattr(dentry, name, data, size, flags);
+		gfs2_glock_dq(&gh);
+	}
+	gfs2_holder_uninit(&gh);
+	return ret;
 }
 
 static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
 			     void *data, size_t size)
 {
-	struct gfs2_ea_request er;
-
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	er.er_type = gfs2_ea_name2type(name, &er.er_name);
-	if (er.er_type == GFS2_EATYPE_UNUSED)
-		return -EOPNOTSUPP;
-	er.er_data = data;
-	er.er_name_len = strlen(er.er_name);
-	er.er_data_len = size;
-
-	return gfs2_ea_get(GFS2_I(dentry->d_inode), &er);
-}
-
-static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
-{
-	struct gfs2_ea_request er;
-
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	er.er_data = (size) ? buffer : NULL;
-	er.er_data_len = size;
+	struct inode *inode = dentry->d_inode;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	int ret;
 
-	return gfs2_ea_list(GFS2_I(dentry->d_inode), &er);
+	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
+	ret = gfs2_glock_nq(&gh);
+	if (ret == 0) {
+		ret = generic_getxattr(dentry, name, data, size);
+		gfs2_glock_dq(&gh);
+	}
+	gfs2_holder_uninit(&gh);
+	return ret;
 }
 
 static int gfs2_removexattr(struct dentry *dentry, const char *name)
 {
-	struct gfs2_ea_request er;
-
-	memset(&er, 0, sizeof(struct gfs2_ea_request));
-	er.er_type = gfs2_ea_name2type(name, &er.er_name);
-	if (er.er_type == GFS2_EATYPE_UNUSED)
-		return -EOPNOTSUPP;
-	er.er_name_len = strlen(er.er_name);
+	struct inode *inode = dentry->d_inode;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	int ret;
 
-	return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er);
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+	ret = gfs2_glock_nq(&gh);
+	if (ret == 0) {
+		ret = generic_removexattr(dentry, name);
+		gfs2_glock_dq(&gh);
+	}
+	gfs2_holder_uninit(&gh);
+	return ret;
 }
 
 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,

fs/gfs2/super.h

@@ -54,6 +54,7 @@ extern struct file_system_type gfs2meta_fs_type;
 extern const struct export_operations gfs2_export_ops;
 extern const struct super_operations gfs2_super_ops;
 extern const struct dentry_operations gfs2_dops;
+extern struct xattr_handler *gfs2_xattr_handlers[];
 
 #endif /* __SUPER_DOT_H__ */