Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull remaining vfs xattr work from Al Viro:
 "The rest of work.xattr (non-cifs conversions)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  btrfs: Switch to generic xattr handlers
  ubifs: Switch to generic xattr handlers
  jfs: Switch to generic xattr handlers
  jfs: Clean up xattr name mapping
  gfs2: Switch to generic xattr handlers
  ceph: kill __ceph_removexattr()
  ceph: Switch to generic xattr handlers
  ceph: Get rid of d_find_alias in ceph_set_acl

fs/btrfs/inode.c

@@ -10160,10 +10160,10 @@ static const struct inode_operations btrfs_dir_inode_operations = {
 	.symlink	= btrfs_symlink,
 	.setattr	= btrfs_setattr,
 	.mknod		= btrfs_mknod,
-	.setxattr	= btrfs_setxattr,
+	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= btrfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.permission	= btrfs_permission,
 	.get_acl	= btrfs_get_acl,
 	.set_acl	= btrfs_set_acl,
@@ -10237,10 +10237,10 @@ static const struct address_space_operations btrfs_symlink_aops = {
 static const struct inode_operations btrfs_file_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
-	.setxattr	= btrfs_setxattr,
+	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr      = btrfs_listxattr,
-	.removexattr	= btrfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.permission	= btrfs_permission,
 	.fiemap		= btrfs_fiemap,
 	.get_acl	= btrfs_get_acl,
@@ -10251,10 +10251,10 @@ static const struct inode_operations btrfs_special_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
 	.permission	= btrfs_permission,
-	.setxattr	= btrfs_setxattr,
+	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= btrfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.get_acl	= btrfs_get_acl,
 	.set_acl	= btrfs_set_acl,
 	.update_time	= btrfs_update_time,
@@ -10265,10 +10265,10 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
 	.permission	= btrfs_permission,
-	.setxattr	= btrfs_setxattr,
+	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= btrfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.update_time	= btrfs_update_time,
 };
 

fs/btrfs/xattr.c

@@ -237,6 +237,9 @@ int __btrfs_setxattr(struct btrfs_trans_handle *trans,
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	int ret;
 
+	if (btrfs_root_readonly(root))
+		return -EROFS;
+
 	if (trans)
 		return do_setxattr(trans, inode, name, value, size, flags);
 
@@ -432,25 +435,6 @@ const struct xattr_handler *btrfs_xattr_handlers[] = {
 	NULL,
 };
 
-int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
-		   size_t size, int flags)
-{
-	struct btrfs_root *root = BTRFS_I(d_inode(dentry))->root;
-
-	if (btrfs_root_readonly(root))
-		return -EROFS;
-	return generic_setxattr(dentry, name, value, size, flags);
-}
-
-int btrfs_removexattr(struct dentry *dentry, const char *name)
-{
-	struct btrfs_root *root = BTRFS_I(d_inode(dentry))->root;
-
-	if (btrfs_root_readonly(root))
-		return -EROFS;
-	return generic_removexattr(dentry, name);
-}
-
 static int btrfs_initxattrs(struct inode *inode,
 			    const struct xattr *xattr_array, void *fs_info)
 {

fs/btrfs/xattr.h

@@ -28,9 +28,6 @@ extern ssize_t __btrfs_getxattr(struct inode *inode, const char *name,
 extern int __btrfs_setxattr(struct btrfs_trans_handle *trans,
 			    struct inode *inode, const char *name,
 			    const void *value, size_t size, int flags);
-extern int btrfs_setxattr(struct dentry *dentry, const char *name,
-		const void *value, size_t size, int flags);
-extern int btrfs_removexattr(struct dentry *dentry, const char *name);
 
 extern int btrfs_xattr_security_init(struct btrfs_trans_handle *trans,
 				     struct inode *inode, struct inode *dir,

fs/ceph/acl.c

@@ -90,7 +90,6 @@ int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 	char *value = NULL;
 	struct iattr newattrs;
 	umode_t new_mode = inode->i_mode, old_mode = inode->i_mode;
-	struct dentry *dentry;
 
 	switch (type) {
 	case ACL_TYPE_ACCESS:
@@ -128,29 +127,26 @@ int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 			goto out_free;
 	}
 
-	dentry = d_find_alias(inode);
 	if (new_mode != old_mode) {
 		newattrs.ia_mode = new_mode;
 		newattrs.ia_valid = ATTR_MODE;
-		ret = ceph_setattr(dentry, &newattrs);
+		ret = __ceph_setattr(inode, &newattrs);
 		if (ret)
-			goto out_dput;
+			goto out_free;
 	}
 
-	ret = __ceph_setxattr(dentry, name, value, size, 0);
+	ret = __ceph_setxattr(inode, name, value, size, 0);
 	if (ret) {
 		if (new_mode != old_mode) {
 			newattrs.ia_mode = old_mode;
 			newattrs.ia_valid = ATTR_MODE;
-			ceph_setattr(dentry, &newattrs);
+			__ceph_setattr(inode, &newattrs);
 		}
-		goto out_dput;
+		goto out_free;
 	}
 
 	ceph_set_cached_acl(inode, type, acl);
 
-out_dput:
-	dput(dentry);
 out_free:
 	kfree(value);
 out:

fs/ceph/dir.c

@@ -5,6 +5,7 @@
 #include <linux/namei.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
+#include <linux/xattr.h>
 
 #include "super.h"
 #include "mds_client.h"
@@ -1342,10 +1343,10 @@ const struct inode_operations ceph_dir_iops = {
 	.permission = ceph_permission,
 	.getattr = ceph_getattr,
 	.setattr = ceph_setattr,
-	.setxattr = ceph_setxattr,
-	.getxattr = ceph_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = ceph_removexattr,
+	.removexattr = generic_removexattr,
 	.get_acl = ceph_get_acl,
 	.set_acl = ceph_set_acl,
 	.mknod = ceph_mknod,

fs/ceph/inode.c

@@ -8,6 +8,7 @@
 #include <linux/kernel.h>
 #include <linux/writeback.h>
 #include <linux/vmalloc.h>
+#include <linux/xattr.h>
 #include <linux/posix_acl.h>
 #include <linux/random.h>
 
@@ -92,10 +93,10 @@ const struct inode_operations ceph_file_iops = {
 	.permission = ceph_permission,
 	.setattr = ceph_setattr,
 	.getattr = ceph_getattr,
-	.setxattr = ceph_setxattr,
-	.getxattr = ceph_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = ceph_removexattr,
+	.removexattr = generic_removexattr,
 	.get_acl = ceph_get_acl,
 	.set_acl = ceph_set_acl,
 };
@@ -1770,22 +1771,18 @@ static const struct inode_operations ceph_symlink_iops = {
 	.get_link = simple_get_link,
 	.setattr = ceph_setattr,
 	.getattr = ceph_getattr,
-	.setxattr = ceph_setxattr,
-	.getxattr = ceph_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = ceph_removexattr,
+	.removexattr = generic_removexattr,
 };
 
-/*
- * setattr
- */
-int ceph_setattr(struct dentry *dentry, struct iattr *attr)
+int __ceph_setattr(struct inode *inode, struct iattr *attr)
 {
-	struct inode *inode = d_inode(dentry);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	const unsigned int ia_valid = attr->ia_valid;
 	struct ceph_mds_request *req;
-	struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
+	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
 	struct ceph_cap_flush *prealloc_cf;
 	int issued;
 	int release = 0, dirtied = 0;
@@ -2009,6 +2006,14 @@ out_put:
 	return err;
 }
 
+/*
+ * setattr
+ */
+int ceph_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	return __ceph_setattr(d_inode(dentry), attr);
+}
+
 /*
  * Verify that we have a lease on the given mask.  If not,
  * do a getattr against an mds.

fs/ceph/super.h

@@ -785,19 +785,15 @@ static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
 	return __ceph_do_getattr(inode, NULL, mask, force);
 }
 extern int ceph_permission(struct inode *inode, int mask);
+extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
 			struct kstat *stat);
 
 /* xattr.c */
-extern int ceph_setxattr(struct dentry *, const char *, const void *,
-			 size_t, int);
-int __ceph_setxattr(struct dentry *, const char *, const void *, size_t, int);
+int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
-int __ceph_removexattr(struct dentry *, const char *);
-extern ssize_t ceph_getxattr(struct dentry *, struct inode *, const char *, void *, size_t);
 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
-extern int ceph_removexattr(struct dentry *, const char *);
 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
 extern void __init ceph_xattr_init(void);

fs/ceph/xattr.c

@@ -16,6 +16,8 @@
 static int __remove_xattr(struct ceph_inode_info *ci,
 			  struct ceph_inode_xattr *xattr);
 
+const struct xattr_handler ceph_other_xattr_handler;
+
 /*
  * List of handlers for synthetic system.* attributes. Other
  * attributes are handled directly.
@@ -25,6 +27,7 @@ const struct xattr_handler *ceph_xattr_handlers[] = {
 	&posix_acl_access_xattr_handler,
 	&posix_acl_default_xattr_handler,
 #endif
+	&ceph_other_xattr_handler,
 	NULL,
 };
 
@@ -33,7 +36,6 @@ static bool ceph_is_valid_xattr(const char *name)
 	return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
 	       !strncmp(name, XATTR_SECURITY_PREFIX,
 			XATTR_SECURITY_PREFIX_LEN) ||
-	       !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
 	       !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
 	       !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
 }
@@ -496,19 +498,6 @@ static int __remove_xattr(struct ceph_inode_info *ci,
 	return 0;
 }
 
-static int __remove_xattr_by_name(struct ceph_inode_info *ci,
-			   const char *name)
-{
-	struct rb_node **p;
-	struct ceph_inode_xattr *xattr;
-	int err;
-
-	p = &ci->i_xattrs.index.rb_node;
-	xattr = __get_xattr(ci, name);
-	err = __remove_xattr(ci, xattr);
-	return err;
-}
-
 static char *__copy_xattr_names(struct ceph_inode_info *ci,
 				char *dest)
 {
@@ -740,9 +729,6 @@ ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
 	int req_mask;
 	int err;
 
-	if (!ceph_is_valid_xattr(name))
-		return -ENODATA;
-
 	/* let's see if a virtual xattr was requested */
 	vxattr = ceph_match_vxattr(inode, name);
 	if (vxattr) {
@@ -804,15 +790,6 @@ out:
 	return err;
 }
 
-ssize_t ceph_getxattr(struct dentry *dentry, struct inode *inode,
-		      const char *name, void *value, size_t size)
-{
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_getxattr(dentry, inode, name, value, size);
-
-	return __ceph_getxattr(inode, name, value, size);
-}
-
 ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
 {
 	struct inode *inode = d_inode(dentry);
@@ -877,11 +854,10 @@ out:
 	return err;
 }
 
-static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
+static int ceph_sync_setxattr(struct inode *inode, const char *name,
 			      const char *value, size_t size, int flags)
 {
-	struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
-	struct inode *inode = d_inode(dentry);
+	struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct ceph_mds_request *req;
 	struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -939,13 +915,12 @@ out:
 	return err;
 }
 
-int __ceph_setxattr(struct dentry *dentry, const char *name,
+int __ceph_setxattr(struct inode *inode, const char *name,
 			const void *value, size_t size, int flags)
 {
-	struct inode *inode = d_inode(dentry);
 	struct ceph_vxattr *vxattr;
 	struct ceph_inode_info *ci = ceph_inode(inode);
-	struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
+	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
 	struct ceph_cap_flush *prealloc_cf = NULL;
 	int issued;
 	int err;
@@ -958,8 +933,8 @@ int __ceph_setxattr(struct dentry *dentry, const char *name,
 	int required_blob_size;
 	bool lock_snap_rwsem = false;
 
-	if (!ceph_is_valid_xattr(name))
-		return -EOPNOTSUPP;
+	if (ceph_snap(inode) != CEPH_NOSNAP)
+		return -EROFS;
 
 	vxattr = ceph_match_vxattr(inode, name);
 	if (vxattr && vxattr->readonly)
@@ -1056,7 +1031,7 @@ do_sync_unlocked:
 				    "during filling trace\n", inode);
 		err = -EBUSY;
 	} else {
-		err = ceph_sync_setxattr(dentry, name, value, size, flags);
+		err = ceph_sync_setxattr(inode, name, value, size, flags);
 	}
 out:
 	ceph_free_cap_flush(prealloc_cf);
@@ -1066,146 +1041,29 @@ out:
 	return err;
 }
 
-int ceph_setxattr(struct dentry *dentry, const char *name,
-		  const void *value, size_t size, int flags)
-{
-	if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
-		return -EROFS;
-
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_setxattr(dentry, name, value, size, flags);
-
-	if (size == 0)
-		value = "";  /* empty EA, do not remove */
-
-	return __ceph_setxattr(dentry, name, value, size, flags);
-}
-
-static int ceph_send_removexattr(struct dentry *dentry, const char *name)
+static int ceph_get_xattr_handler(const struct xattr_handler *handler,
+				  struct dentry *dentry, struct inode *inode,
+				  const char *name, void *value, size_t size)
 {
-	struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
-	struct ceph_mds_client *mdsc = fsc->mdsc;
-	struct inode *inode = d_inode(dentry);
-	struct ceph_mds_request *req;
-	int err;
-
-	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
-				       USE_AUTH_MDS);
-	if (IS_ERR(req))
-		return PTR_ERR(req);
-	req->r_path2 = kstrdup(name, GFP_NOFS);
-	if (!req->r_path2)
-		return -ENOMEM;
-
-	req->r_inode = inode;
-	ihold(inode);
-	req->r_num_caps = 1;
-	req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
-	err = ceph_mdsc_do_request(mdsc, NULL, req);
-	ceph_mdsc_put_request(req);
-	return err;
+	if (!ceph_is_valid_xattr(name))
+		return -EOPNOTSUPP;
+	return __ceph_getxattr(inode, name, value, size);
 }
 
-int __ceph_removexattr(struct dentry *dentry, const char *name)
+static int ceph_set_xattr_handler(const struct xattr_handler *handler,
+				  struct dentry *dentry, const char *name,
+				  const void *value, size_t size, int flags)
 {
-	struct inode *inode = d_inode(dentry);
-	struct ceph_vxattr *vxattr;
-	struct ceph_inode_info *ci = ceph_inode(inode);
-	struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
-	struct ceph_cap_flush *prealloc_cf = NULL;
-	int issued;
-	int err;
-	int required_blob_size;
-	int dirty;
-	bool lock_snap_rwsem = false;
-
 	if (!ceph_is_valid_xattr(name))
 		return -EOPNOTSUPP;
-
-	vxattr = ceph_match_vxattr(inode, name);
-	if (vxattr && vxattr->readonly)
-		return -EOPNOTSUPP;
-
-	/* pass any unhandled ceph.* xattrs through to the MDS */
-	if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
-		goto do_sync_unlocked;
-
-	prealloc_cf = ceph_alloc_cap_flush();
-	if (!prealloc_cf)
-		return -ENOMEM;
-
-	err = -ENOMEM;
-	spin_lock(&ci->i_ceph_lock);
-retry:
-	issued = __ceph_caps_issued(ci, NULL);
-	if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))
-		goto do_sync;
-
-	if (!lock_snap_rwsem && !ci->i_head_snapc) {
-		lock_snap_rwsem = true;
-		if (!down_read_trylock(&mdsc->snap_rwsem)) {
-			spin_unlock(&ci->i_ceph_lock);
-			down_read(&mdsc->snap_rwsem);
-			spin_lock(&ci->i_ceph_lock);
-			goto retry;
-		}
-	}
-
-	dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
-
-	__build_xattrs(inode);
-
-	required_blob_size = __get_required_blob_size(ci, 0, 0);
-
-	if (!ci->i_xattrs.prealloc_blob ||
-	    required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
-		struct ceph_buffer *blob;
-
-		spin_unlock(&ci->i_ceph_lock);
-		dout(" preaallocating new blob size=%d\n", required_blob_size);
-		blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
-		if (!blob)
-			goto do_sync_unlocked;
-		spin_lock(&ci->i_ceph_lock);
-		if (ci->i_xattrs.prealloc_blob)
-			ceph_buffer_put(ci->i_xattrs.prealloc_blob);
-		ci->i_xattrs.prealloc_blob = blob;
-		goto retry;
-	}
-
-	err = __remove_xattr_by_name(ceph_inode(inode), name);
-
-	dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL,
-				       &prealloc_cf);
-	ci->i_xattrs.dirty = true;
-	inode->i_ctime = current_fs_time(inode->i_sb);
-	spin_unlock(&ci->i_ceph_lock);
-	if (lock_snap_rwsem)
-		up_read(&mdsc->snap_rwsem);
-	if (dirty)
-		__mark_inode_dirty(inode, dirty);
-	ceph_free_cap_flush(prealloc_cf);
-	return err;
-do_sync:
-	spin_unlock(&ci->i_ceph_lock);
-do_sync_unlocked:
-	if (lock_snap_rwsem)
-		up_read(&mdsc->snap_rwsem);
-	ceph_free_cap_flush(prealloc_cf);
-	err = ceph_send_removexattr(dentry, name);
-	return err;
+	return __ceph_setxattr(d_inode(dentry), name, value, size, flags);
 }
 
-int ceph_removexattr(struct dentry *dentry, const char *name)
-{
-	if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
-		return -EROFS;
-
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_removexattr(dentry, name);
-
-	return __ceph_removexattr(dentry, name);
-}
+const struct xattr_handler ceph_other_xattr_handler = {
+	.prefix = "",  /* match any name => handlers called with full name */
+	.get = ceph_get_xattr_handler,
+	.set = ceph_set_xattr_handler,
+};
 
 #ifdef CONFIG_SECURITY
 bool ceph_security_xattr_wanted(struct inode *in)

fs/gfs2/acl.c

@@ -24,6 +24,7 @@
 #include "glock.h"
 #include "inode.h"
 #include "meta_io.h"
+#include "rgrp.h"
 #include "trans.h"
 #include "util.h"
 
@@ -38,7 +39,7 @@ static const char *gfs2_acl_name(int type)
 	return NULL;
 }
 
-struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
+static struct posix_acl *__gfs2_get_acl(struct inode *inode, int type)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct posix_acl *acl;
@@ -50,29 +51,41 @@ struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
 		return NULL;
 
 	name = gfs2_acl_name(type);
-	if (name == NULL)
-		return ERR_PTR(-EINVAL);
-
 	len = gfs2_xattr_acl_get(ip, name, &data);
-	if (len < 0)
+	if (len <= 0)
 		return ERR_PTR(len);
-	if (len == 0)
-		return NULL;
-
 	acl = posix_acl_from_xattr(&init_user_ns, data, len);
 	kfree(data);
 	return acl;
 }
 
-int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	bool need_unlock = false;
+	struct posix_acl *acl;
+
+	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
+		int ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
+					     LM_FLAG_ANY, &gh);
+		if (ret)
+			return ERR_PTR(ret);
+		need_unlock = true;
+	}
+	acl = __gfs2_get_acl(inode, type);
+	if (need_unlock)
+		gfs2_glock_dq_uninit(&gh);
+	return acl;
+}
+
+int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 {
 	int error;
 	int len;
 	char *data;
 	const char *name = gfs2_acl_name(type);
 
-	BUG_ON(name == NULL);
-
 	if (acl && acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode)))
 		return -E2BIG;
 
@@ -115,3 +128,26 @@ out:
 	kfree(data);
 	return error;
 }
+
+int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	bool need_unlock = false;
+	int ret;
+
+	ret = gfs2_rsqa_alloc(ip);
+	if (ret)
+		return ret;
+
+	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
+		ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+		if (ret)
+			return ret;
+		need_unlock = true;
+	}
+	ret = __gfs2_set_acl(inode, acl, type);
+	if (need_unlock)
+		gfs2_glock_dq_uninit(&gh);
+	return ret;
+}

fs/gfs2/acl.h

@@ -15,6 +15,7 @@
 #define GFS2_ACL_MAX_ENTRIES(sdp) ((300 << (sdp)->sd_sb.sb_bsize_shift) >> 12)
 
 extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type);
+extern int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 extern int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 
 #endif /* __ACL_DOT_H__ */

fs/gfs2/inode.c

@@ -692,12 +692,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 			       considered free. Any failures need to undo
 			       the gfs2 structures. */
 	if (default_acl) {
-		error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+		error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
 		posix_acl_release(default_acl);
 	}
 	if (acl) {
 		if (!error)
-			error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+			error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
 		posix_acl_release(acl);
 	}
 
@@ -1948,66 +1948,6 @@ static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	return 0;
 }
 
-static int gfs2_setxattr(struct dentry *dentry, const char *name,
-			 const void *data, size_t size, int flags)
-{
-	struct inode *inode = d_inode(dentry);
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder gh;
-	int ret;
-
-	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
-	ret = gfs2_glock_nq(&gh);
-	if (ret == 0) {
-		ret = gfs2_rsqa_alloc(ip);
-		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, struct inode *inode,
-			     const char *name, void *data, size_t size)
-{
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder gh;
-	int ret;
-
-	/* For selinux during lookup */
-	if (gfs2_glock_is_locked_by_me(ip->i_gl))
-		return generic_getxattr(dentry, inode, name, data, size);
-
-	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, inode, name, data, size);
-		gfs2_glock_dq(&gh);
-	}
-	gfs2_holder_uninit(&gh);
-	return ret;
-}
-
-static int gfs2_removexattr(struct dentry *dentry, const char *name)
-{
-	struct inode *inode = d_inode(dentry);
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder gh;
-	int ret;
-
-	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
-	ret = gfs2_glock_nq(&gh);
-	if (ret == 0) {
-		ret = gfs2_rsqa_alloc(ip);
-		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,
 		       u64 start, u64 len)
 {
@@ -2054,10 +1994,10 @@ const struct inode_operations gfs2_file_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = gfs2_setxattr,
-	.getxattr = gfs2_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = gfs2_removexattr,
+	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
@@ -2076,10 +2016,10 @@ const struct inode_operations gfs2_dir_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = gfs2_setxattr,
-	.getxattr = gfs2_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = gfs2_removexattr,
+	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
@@ -2092,10 +2032,10 @@ const struct inode_operations gfs2_symlink_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = gfs2_setxattr,
-	.getxattr = gfs2_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = gfs2_removexattr,
+	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 };
 

fs/gfs2/xattr.c

@@ -583,13 +583,11 @@ out:
  *
  * Returns: actual size of data on success, -errno on error
  */
-static int gfs2_xattr_get(const struct xattr_handler *handler,
-			  struct dentry *unused, struct inode *inode,
-			  const char *name, void *buffer, size_t size)
+static int __gfs2_xattr_get(struct inode *inode, const char *name,
+			    void *buffer, size_t size, int type)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_ea_location el;
-	int type = handler->flags;
 	int error;
 
 	if (!ip->i_eattr)
@@ -611,6 +609,29 @@ static int gfs2_xattr_get(const struct xattr_handler *handler,
 	return error;
 }
 
+static int gfs2_xattr_get(const struct xattr_handler *handler,
+			  struct dentry *unused, struct inode *inode,
+			  const char *name, void *buffer, size_t size)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	bool need_unlock = false;
+	int ret;
+
+	/* During lookup, SELinux calls this function with the glock locked. */
+
+	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
+		ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
+		if (ret)
+			return ret;
+		need_unlock = true;
+	}
+	ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags);
+	if (need_unlock)
+		gfs2_glock_dq_uninit(&gh);
+	return ret;
+}
+
 /**
  * ea_alloc_blk - allocates a new block for extended attributes.
  * @ip: A pointer to the inode that's getting extended attributes
@@ -1233,8 +1254,21 @@ static int gfs2_xattr_set(const struct xattr_handler *handler,
 			  struct dentry *dentry, const char *name,
 			  const void *value, size_t size, int flags)
 {
-	return __gfs2_xattr_set(d_inode(dentry), name, value,
-				size, flags, handler->flags);
+	struct inode *inode = d_inode(dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	int ret;
+
+	ret = gfs2_rsqa_alloc(ip);
+	if (ret)
+		return ret;
+
+	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+	if (ret)
+		return ret;
+	ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags);
+	gfs2_glock_dq_uninit(&gh);
+	return ret;
 }
 
 static int ea_dealloc_indirect(struct gfs2_inode *ip)

fs/jfs/file.c

@@ -140,10 +140,10 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 }
 
 const struct inode_operations jfs_file_inode_operations = {
-	.setxattr	= jfs_setxattr,
-	.getxattr	= jfs_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= jfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,

fs/jfs/jfs_xattr.h

@@ -19,6 +19,8 @@
 #ifndef H_JFS_XATTR
 #define H_JFS_XATTR
 
+#include <linux/xattr.h>
+
 /*
  * jfs_ea_list describe the on-disk format of the extended attributes.
  * I know the null-terminator is redundant since namelen is stored, but
@@ -54,12 +56,8 @@ struct jfs_ea_list {
 
 extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
 			  size_t, int);
-extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t,
-			int);
 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
-extern ssize_t jfs_getxattr(struct dentry *, struct inode *, const char *, void *, size_t);
 extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
-extern int jfs_removexattr(struct dentry *, const char *);
 
 extern const struct xattr_handler *jfs_xattr_handlers[];
 

fs/jfs/namei.c

@@ -1537,10 +1537,10 @@ const struct inode_operations jfs_dir_inode_operations = {
 	.rmdir		= jfs_rmdir,
 	.mknod		= jfs_mknod,
 	.rename		= jfs_rename,
-	.setxattr	= jfs_setxattr,
-	.getxattr	= jfs_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= jfs_removexattr,
+	.removexattr	= generic_removexattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,

fs/jfs/symlink.c

@@ -25,19 +25,19 @@ const struct inode_operations jfs_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= simple_get_link,
 	.setattr	= jfs_setattr,
-	.setxattr	= jfs_setxattr,
-	.getxattr	= jfs_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= jfs_removexattr,
+	.removexattr	= generic_removexattr,
 };
 
 const struct inode_operations jfs_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= page_get_link,
 	.setattr	= jfs_setattr,
-	.setxattr	= jfs_setxattr,
-	.getxattr	= jfs_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= jfs_removexattr,
+	.removexattr	= generic_removexattr,
 };
 

fs/jfs/xattr.c

@@ -86,6 +86,14 @@ struct ea_buffer {
 #define EA_MALLOC	0x0008
 
 
+/*
+ * Mapping of on-disk attribute names: for on-disk attribute names with an
+ * unknown prefix (not "system.", "user.", "security.", or "trusted."), the
+ * prefix "os2." is prepended.  On the way back to disk, "os2." prefixes are
+ * stripped and we make sure that the remaining name does not start with one
+ * of the know prefixes.
+ */
+
 static int is_known_namespace(const char *name)
 {
 	if (strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) &&
@@ -97,29 +105,19 @@ static int is_known_namespace(const char *name)
 	return true;
 }
 
-/*
- * These three routines are used to recognize on-disk extended attributes
- * that are in a recognized namespace.  If the attribute is not recognized,
- * "os2." is prepended to the name
- */
-static int is_os2_xattr(struct jfs_ea *ea)
-{
-	return !is_known_namespace(ea->name);
-}
-
 static inline int name_size(struct jfs_ea *ea)
 {
-	if (is_os2_xattr(ea))
-		return ea->namelen + XATTR_OS2_PREFIX_LEN;
-	else
+	if (is_known_namespace(ea->name))
 		return ea->namelen;
+	else
+		return ea->namelen + XATTR_OS2_PREFIX_LEN;
 }
 
 static inline int copy_name(char *buffer, struct jfs_ea *ea)
 {
 	int len = ea->namelen;
 
-	if (is_os2_xattr(ea)) {
+	if (!is_known_namespace(ea->name)) {
 		memcpy(buffer, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN);
 		buffer += XATTR_OS2_PREFIX_LEN;
 		len += XATTR_OS2_PREFIX_LEN;
@@ -665,35 +663,6 @@ static int ea_put(tid_t tid, struct inode *inode, struct ea_buffer *ea_buf,
 	return 0;
 }
 
-/*
- * Most of the permission checking is done by xattr_permission in the vfs.
- * We also need to verify that this is a namespace that we recognize.
- */
-static int can_set_xattr(struct inode *inode, const char *name,
-			 const void *value, size_t value_len)
-{
-	if (!strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)) {
-		/*
-		 * This makes sure that we aren't trying to set an
-		 * attribute in a different namespace by prefixing it
-		 * with "os2."
-		 */
-		if (is_known_namespace(name + XATTR_OS2_PREFIX_LEN))
-			return -EOPNOTSUPP;
-		return 0;
-	}
-
-	/*
-	 * Don't allow setting an attribute in an unknown namespace.
-	 */
-	if (strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) &&
-	    strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
-	    strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
-		return -EOPNOTSUPP;
-
-	return 0;
-}
-
 int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
 		   const void *value, size_t value_len, int flags)
 {
@@ -704,21 +673,10 @@ int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
 	int xattr_size;
 	int new_size;
 	int namelen = strlen(name);
-	char *os2name = NULL;
 	int found = 0;
 	int rc;
 	int length;
 
-	if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
-		os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1,
-				  GFP_KERNEL);
-		if (!os2name)
-			return -ENOMEM;
-		strcpy(os2name, name + XATTR_OS2_PREFIX_LEN);
-		name = os2name;
-		namelen -= XATTR_OS2_PREFIX_LEN;
-	}
-
 	down_write(&JFS_IP(inode)->xattr_sem);
 
 	xattr_size = ea_get(inode, &ea_buf, 0);
@@ -841,44 +799,6 @@ int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
       out:
 	up_write(&JFS_IP(inode)->xattr_sem);
 
-	kfree(os2name);
-
-	return rc;
-}
-
-int jfs_setxattr(struct dentry *dentry, const char *name, const void *value,
-		 size_t value_len, int flags)
-{
-	struct inode *inode = d_inode(dentry);
-	struct jfs_inode_info *ji = JFS_IP(inode);
-	int rc;
-	tid_t tid;
-
-	/*
-	 * If this is a request for a synthetic attribute in the system.*
-	 * namespace use the generic infrastructure to resolve a handler
-	 * for it via sb->s_xattr.
-	 */
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_setxattr(dentry, name, value, value_len, flags);
-
-	if ((rc = can_set_xattr(inode, name, value, value_len)))
-		return rc;
-
-	if (value == NULL) {	/* empty EA, do not remove */
-		value = "";
-		value_len = 0;
-	}
-
-	tid = txBegin(inode->i_sb, 0);
-	mutex_lock(&ji->commit_mutex);
-	rc = __jfs_setxattr(tid, d_inode(dentry), name, value, value_len,
-			    flags);
-	if (!rc)
-		rc = txCommit(tid, 1, &inode, 0);
-	txEnd(tid);
-	mutex_unlock(&ji->commit_mutex);
-
 	return rc;
 }
 
@@ -933,37 +853,6 @@ ssize_t __jfs_getxattr(struct inode *inode, const char *name, void *data,
 	return size;
 }
 
-ssize_t jfs_getxattr(struct dentry *dentry, struct inode *inode,
-		     const char *name, void *data, size_t buf_size)
-{
-	int err;
-
-	/*
-	 * If this is a request for a synthetic attribute in the system.*
-	 * namespace use the generic infrastructure to resolve a handler
-	 * for it via sb->s_xattr.
-	 */
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_getxattr(dentry, inode, name, data, buf_size);
-
-	if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
-		/*
-		 * skip past "os2." prefix
-		 */
-		name += XATTR_OS2_PREFIX_LEN;
-		/*
-		 * Don't allow retrieving properly prefixed attributes
-		 * by prepending them with "os2."
-		 */
-		if (is_known_namespace(name))
-			return -EOPNOTSUPP;
-	}
-
-	err = __jfs_getxattr(inode, name, data, buf_size);
-
-	return err;
-}
-
 /*
  * No special permissions are needed to list attributes except for trusted.*
  */
@@ -1027,27 +916,16 @@ ssize_t jfs_listxattr(struct dentry * dentry, char *data, size_t buf_size)
 	return size;
 }
 
-int jfs_removexattr(struct dentry *dentry, const char *name)
+static int __jfs_xattr_set(struct inode *inode, const char *name,
+			   const void *value, size_t size, int flags)
 {
-	struct inode *inode = d_inode(dentry);
 	struct jfs_inode_info *ji = JFS_IP(inode);
-	int rc;
 	tid_t tid;
-
-	/*
-	 * If this is a request for a synthetic attribute in the system.*
-	 * namespace use the generic infrastructure to resolve a handler
-	 * for it via sb->s_xattr.
-	 */
-	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
-		return generic_removexattr(dentry, name);
-
-	if ((rc = can_set_xattr(inode, name, NULL, 0)))
-		return rc;
+	int rc;
 
 	tid = txBegin(inode->i_sb, 0);
 	mutex_lock(&ji->commit_mutex);
-	rc = __jfs_setxattr(tid, d_inode(dentry), name, NULL, 0, XATTR_REPLACE);
+	rc = __jfs_setxattr(tid, inode, name, value, size, flags);
 	if (!rc)
 		rc = txCommit(tid, 1, &inode, 0);
 	txEnd(tid);
@@ -1056,15 +934,77 @@ int jfs_removexattr(struct dentry *dentry, const char *name)
 	return rc;
 }
 
-/*
- * List of handlers for synthetic system.* attributes.  All real ondisk
- * attributes are handled directly.
- */
+static int jfs_xattr_get(const struct xattr_handler *handler,
+			 struct dentry *unused, struct inode *inode,
+			 const char *name, void *value, size_t size)
+{
+	name = xattr_full_name(handler, name);
+	return __jfs_getxattr(inode, name, value, size);
+}
+
+static int jfs_xattr_set(const struct xattr_handler *handler,
+			 struct dentry *dentry, const char *name,
+			 const void *value, size_t size, int flags)
+{
+	struct inode *inode = d_inode(dentry);
+
+	name = xattr_full_name(handler, name);
+	return __jfs_xattr_set(inode, name, value, size, flags);
+}
+
+static int jfs_xattr_get_os2(const struct xattr_handler *handler,
+			     struct dentry *unused, struct inode *inode,
+			     const char *name, void *value, size_t size)
+{
+	if (is_known_namespace(name))
+		return -EOPNOTSUPP;
+	return __jfs_getxattr(inode, name, value, size);
+}
+
+static int jfs_xattr_set_os2(const struct xattr_handler *handler,
+			     struct dentry *dentry, const char *name,
+			     const void *value, size_t size, int flags)
+{
+	struct inode *inode = d_inode(dentry);
+
+	if (is_known_namespace(name))
+		return -EOPNOTSUPP;
+	return __jfs_xattr_set(inode, name, value, size, flags);
+}
+
+static const struct xattr_handler jfs_user_xattr_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.get = jfs_xattr_get,
+	.set = jfs_xattr_set,
+};
+
+static const struct xattr_handler jfs_os2_xattr_handler = {
+	.prefix = XATTR_OS2_PREFIX,
+	.get = jfs_xattr_get_os2,
+	.set = jfs_xattr_set_os2,
+};
+
+static const struct xattr_handler jfs_security_xattr_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.get = jfs_xattr_get,
+	.set = jfs_xattr_set,
+};
+
+static const struct xattr_handler jfs_trusted_xattr_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = jfs_xattr_get,
+	.set = jfs_xattr_set,
+};
+
 const struct xattr_handler *jfs_xattr_handlers[] = {
 #ifdef CONFIG_JFS_POSIX_ACL
 	&posix_acl_access_xattr_handler,
 	&posix_acl_default_xattr_handler,
 #endif
+	&jfs_os2_xattr_handler,
+	&jfs_user_xattr_handler,
+	&jfs_security_xattr_handler,
+	&jfs_trusted_xattr_handler,
 	NULL,
 };
 

fs/ubifs/dir.c

@@ -1182,10 +1182,10 @@ const struct inode_operations ubifs_dir_inode_operations = {
 	.rename      = ubifs_rename,
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = ubifs_setxattr,
-	.getxattr    = ubifs_getxattr,
+	.setxattr    = generic_setxattr,
+	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = ubifs_removexattr,
+	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif

fs/ubifs/file.c

@@ -1597,10 +1597,10 @@ const struct address_space_operations ubifs_file_address_operations = {
 const struct inode_operations ubifs_file_inode_operations = {
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = ubifs_setxattr,
-	.getxattr    = ubifs_getxattr,
+	.setxattr    = generic_setxattr,
+	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = ubifs_removexattr,
+	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif
@@ -1611,10 +1611,10 @@ const struct inode_operations ubifs_symlink_inode_operations = {
 	.get_link    = simple_get_link,
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = ubifs_setxattr,
-	.getxattr    = ubifs_getxattr,
+	.setxattr    = generic_setxattr,
+	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = ubifs_removexattr,
+	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif

fs/ubifs/super.c

@@ -2040,6 +2040,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
 	if (c->max_inode_sz > MAX_LFS_FILESIZE)
 		sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
 	sb->s_op = &ubifs_super_operations;
+	sb->s_xattr = ubifs_xattr_handlers;
 
 	mutex_lock(&c->umount_mutex);
 	err = mount_ubifs(c);

fs/ubifs/ubifs.h

@@ -37,6 +37,7 @@
 #include <linux/pagemap.h>
 #include <linux/backing-dev.h>
 #include <linux/security.h>
+#include <linux/xattr.h>
 #include "ubifs-media.h"
 
 /* Version of this UBIFS implementation */
@@ -1732,12 +1733,8 @@ int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		  struct kstat *stat);
 
 /* xattr.c */
-int ubifs_setxattr(struct dentry *dentry, const char *name,
-		   const void *value, size_t size, int flags);
-ssize_t ubifs_getxattr(struct dentry *dentry, struct inode *host,
-		       const char *name, void *buf, size_t size);
+extern const struct xattr_handler *ubifs_xattr_handlers[];
 ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int ubifs_removexattr(struct dentry *dentry, const char *name);
 int ubifs_init_security(struct inode *dentry, struct inode *inode,
 			const struct qstr *qstr);
 

fs/ubifs/xattr.c

@@ -249,42 +249,6 @@ out_free:
 	return err;
 }
 
-/**
- * check_namespace - check extended attribute name-space.
- * @nm: extended attribute name
- *
- * This function makes sure the extended attribute name belongs to one of the
- * supported extended attribute name-spaces. Returns name-space index in case
- * of success and a negative error code in case of failure.
- */
-static int check_namespace(const struct qstr *nm)
-{
-	int type;
-
-	if (nm->len > UBIFS_MAX_NLEN)
-		return -ENAMETOOLONG;
-
-	if (!strncmp(nm->name, XATTR_TRUSTED_PREFIX,
-		     XATTR_TRUSTED_PREFIX_LEN)) {
-		if (nm->name[XATTR_TRUSTED_PREFIX_LEN] == '\0')
-			return -EINVAL;
-		type = TRUSTED_XATTR;
-	} else if (!strncmp(nm->name, XATTR_USER_PREFIX,
-				      XATTR_USER_PREFIX_LEN)) {
-		if (nm->name[XATTR_USER_PREFIX_LEN] == '\0')
-			return -EINVAL;
-		type = USER_XATTR;
-	} else if (!strncmp(nm->name, XATTR_SECURITY_PREFIX,
-				     XATTR_SECURITY_PREFIX_LEN)) {
-		if (nm->name[XATTR_SECURITY_PREFIX_LEN] == '\0')
-			return -EINVAL;
-		type = SECURITY_XATTR;
-	} else
-		return -EOPNOTSUPP;
-
-	return type;
-}
-
 static struct inode *iget_xattr(struct ubifs_info *c, ino_t inum)
 {
 	struct inode *inode;
@@ -302,24 +266,23 @@ static struct inode *iget_xattr(struct ubifs_info *c, ino_t inum)
 	return ERR_PTR(-EINVAL);
 }
 
-static int setxattr(struct inode *host, const char *name, const void *value,
-		    size_t size, int flags)
+static int __ubifs_setxattr(struct inode *host, const char *name,
+			    const void *value, size_t size, int flags)
 {
 	struct inode *inode;
 	struct ubifs_info *c = host->i_sb->s_fs_info;
 	struct qstr nm = QSTR_INIT(name, strlen(name));
 	struct ubifs_dent_node *xent;
 	union ubifs_key key;
-	int err, type;
+	int err;
 
 	ubifs_assert(inode_is_locked(host));
 
 	if (size > UBIFS_MAX_INO_DATA)
 		return -ERANGE;
 
-	type = check_namespace(&nm);
-	if (type < 0)
-		return type;
+	if (nm.len > UBIFS_MAX_NLEN)
+		return -ENAMETOOLONG;
 
 	xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
 	if (!xent)
@@ -363,17 +326,8 @@ out_free:
 	return err;
 }
 
-int ubifs_setxattr(struct dentry *dentry, const char *name,
-		   const void *value, size_t size, int flags)
-{
-	dbg_gen("xattr '%s', host ino %lu ('%pd'), size %zd",
-		name, d_inode(dentry)->i_ino, dentry, size);
-
-	return setxattr(d_inode(dentry), name, value, size, flags);
-}
-
-ssize_t ubifs_getxattr(struct dentry *dentry, struct inode *host,
-		       const char *name, void *buf, size_t size)
+static ssize_t __ubifs_getxattr(struct inode *host, const char *name,
+				void *buf, size_t size)
 {
 	struct inode *inode;
 	struct ubifs_info *c = host->i_sb->s_fs_info;
@@ -383,12 +337,8 @@ ssize_t ubifs_getxattr(struct dentry *dentry, struct inode *host,
 	union ubifs_key key;
 	int err;
 
-	dbg_gen("xattr '%s', ino %lu ('%pd'), buf size %zd", name,
-		host->i_ino, dentry, size);
-
-	err = check_namespace(&nm);
-	if (err < 0)
-		return err;
+	if (nm.len > UBIFS_MAX_NLEN)
+		return -ENAMETOOLONG;
 
 	xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
 	if (!xent)
@@ -460,8 +410,6 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size)
 
 	lowest_xent_key(c, &key, host->i_ino);
 	while (1) {
-		int type;
-
 		xent = ubifs_tnc_next_ent(c, &key, &nm);
 		if (IS_ERR(xent)) {
 			err = PTR_ERR(xent);
@@ -471,14 +419,10 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size)
 		nm.name = xent->name;
 		nm.len = le16_to_cpu(xent->nlen);
 
-		type = check_namespace(&nm);
-		if (unlikely(type < 0)) {
-			err = type;
-			break;
-		}
-
 		/* Show trusted namespace only for "power" users */
-		if (type != TRUSTED_XATTR || capable(CAP_SYS_ADMIN)) {
+		if (strncmp(xent->name, XATTR_TRUSTED_PREFIX,
+			    XATTR_TRUSTED_PREFIX_LEN) ||
+		    capable(CAP_SYS_ADMIN)) {
 			memcpy(buffer + written, nm.name, nm.len + 1);
 			written += nm.len + 1;
 		}
@@ -538,22 +482,19 @@ out_cancel:
 	return err;
 }
 
-int ubifs_removexattr(struct dentry *dentry, const char *name)
+static int __ubifs_removexattr(struct inode *host, const char *name)
 {
-	struct inode *inode, *host = d_inode(dentry);
+	struct inode *inode;
 	struct ubifs_info *c = host->i_sb->s_fs_info;
 	struct qstr nm = QSTR_INIT(name, strlen(name));
 	struct ubifs_dent_node *xent;
 	union ubifs_key key;
 	int err;
 
-	dbg_gen("xattr '%s', ino %lu ('%pd')", name,
-		host->i_ino, dentry);
 	ubifs_assert(inode_is_locked(host));
 
-	err = check_namespace(&nm);
-	if (err < 0)
-		return err;
+	if (nm.len > UBIFS_MAX_NLEN)
+		return -ENAMETOOLONG;
 
 	xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
 	if (!xent)
@@ -603,7 +544,7 @@ static int init_xattrs(struct inode *inode, const struct xattr *xattr_array,
 		}
 		strcpy(name, XATTR_SECURITY_PREFIX);
 		strcpy(name + XATTR_SECURITY_PREFIX_LEN, xattr->name);
-		err = setxattr(inode, name, xattr->value, xattr->value_len, 0);
+		err = __ubifs_setxattr(inode, name, xattr->value, xattr->value_len, 0);
 		kfree(name);
 		if (err < 0)
 			break;
@@ -626,3 +567,53 @@ int ubifs_init_security(struct inode *dentry, struct inode *inode,
 	}
 	return err;
 }
+
+static int ubifs_xattr_get(const struct xattr_handler *handler,
+			   struct dentry *dentry, struct inode *inode,
+			   const char *name, void *buffer, size_t size)
+{
+	dbg_gen("xattr '%s', ino %lu ('%pd'), buf size %zd", name,
+		inode->i_ino, dentry, size);
+
+	return  __ubifs_getxattr(inode, name, buffer, size);
+}
+
+static int ubifs_xattr_set(const struct xattr_handler *handler,
+			   struct dentry *dentry, const char *name,
+			   const void *value, size_t size, int flags)
+{
+	struct inode *inode = d_inode(dentry);
+
+	dbg_gen("xattr '%s', host ino %lu ('%pd'), size %zd",
+		name, inode->i_ino, dentry, size);
+
+	if (value)
+		return __ubifs_setxattr(inode, name, value, size, flags);
+	else
+		return __ubifs_removexattr(inode, name);
+}
+
+const struct xattr_handler ubifs_user_xattr_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.get = ubifs_xattr_get,
+	.set = ubifs_xattr_set,
+};
+
+const struct xattr_handler ubifs_trusted_xattr_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = ubifs_xattr_get,
+	.set = ubifs_xattr_set,
+};
+
+const struct xattr_handler ubifs_security_xattr_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.get = ubifs_xattr_get,
+	.set = ubifs_xattr_set,
+};
+
+const struct xattr_handler *ubifs_xattr_handlers[] = {
+	&ubifs_user_xattr_handler,
+	&ubifs_trusted_xattr_handler,
+	&ubifs_security_xattr_handler,
+	NULL
+};