84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
|
|
*/
|
|
|
|
#ifndef _ZFS_DCACHE_H
|
|
#define _ZFS_DCACHE_H
|
|
|
|
#include <linux/dcache.h>
|
|
|
|
#define dname(dentry) ((char *)((dentry)->d_name.name))
|
|
#define dlen(dentry) ((int)((dentry)->d_name.len))
|
|
|
|
#ifndef HAVE_D_MAKE_ROOT
|
|
#define d_make_root(inode) d_alloc_root(inode)
|
|
#endif /* HAVE_D_MAKE_ROOT */
|
|
|
|
/*
|
|
* 2.6.30 API change,
|
|
* The const keyword was added to the 'struct dentry_operations' in
|
|
* the dentry structure. To handle this we define an appropriate
|
|
* dentry_operations_t typedef which can be used.
|
|
*/
|
|
#ifdef HAVE_CONST_DENTRY_OPERATIONS
|
|
typedef const struct dentry_operations dentry_operations_t;
|
|
#else
|
|
typedef struct dentry_operations dentry_operations_t;
|
|
#endif
|
|
|
|
/*
|
|
* 2.6.38 API change,
|
|
* Added d_set_d_op() helper function which sets some flags in
|
|
* dentry->d_flags based on which operations are defined.
|
|
*/
|
|
#ifndef HAVE_D_SET_D_OP
|
|
static inline void
|
|
d_set_d_op(struct dentry *dentry, dentry_operations_t *op)
|
|
{
|
|
dentry->d_op = op;
|
|
}
|
|
#endif /* HAVE_D_SET_D_OP */
|
|
|
|
/*
|
|
* 2.6.38 API addition,
|
|
* Added d_clear_d_op() helper function which clears some flags and the
|
|
* registered dentry->d_op table. This is required because d_set_d_op()
|
|
* issues a warning when the dentry operations table is already set.
|
|
* For the .zfs control directory to work properly we must be able to
|
|
* override the default operations table and register custom .d_automount
|
|
* and .d_revalidate callbacks.
|
|
*/
|
|
static inline void
|
|
d_clear_d_op(struct dentry *dentry)
|
|
{
|
|
#ifdef HAVE_D_SET_D_OP
|
|
dentry->d_op = NULL;
|
|
dentry->d_flags &=
|
|
~(DCACHE_OP_HASH | DCACHE_OP_COMPARE |
|
|
DCACHE_OP_REVALIDATE | DCACHE_OP_DELETE);
|
|
#endif /* HAVE_D_SET_D_OP */
|
|
}
|
|
|
|
#endif /* _ZFS_DCACHE_H */
|