/**
 * eCryptfs: Linux filesystem encryption layer
 *
 * Copyright (C) 1997-2003 Erez Zadok
 * Copyright (C) 2001-2003 Stony Brook University
 * Copyright (C) 2004-2006 International Business Machines Corp.
 *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/fs_stack.h>
#include <linux/slab.h>
#include "ecryptfs_kernel.h"

/**
 * ecryptfs_d_revalidate - revalidate an ecryptfs dentry
 * @dentry: The ecryptfs dentry
 * @flags: lookup flags
 *
 * Called when the VFS needs to revalidate a dentry. This
 * is called whenever a name lookup finds a dentry in the
 * dcache. Most filesystems leave this as NULL, because all their
 * dentries in the dcache are valid.
 *
 * Returns 1 if valid, 0 otherwise.
 *
 */
static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
	int rc = 1;

	if (flags & LOOKUP_RCU)
		return -ECHILD;

	if (lower_dentry->d_flags & DCACHE_OP_REVALIDATE)
		rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags);

	if (d_really_is_positive(dentry)) {
		struct inode *inode = d_inode(dentry);

		fsstack_copy_attr_all(inode, ecryptfs_inode_to_lower(inode));
		if (!inode->i_nlink)
			return 0;
	}
	return rc;
}

struct kmem_cache *ecryptfs_dentry_info_cache;

static void ecryptfs_dentry_free_rcu(struct rcu_head *head)
{
	kmem_cache_free(ecryptfs_dentry_info_cache,
		container_of(head, struct ecryptfs_dentry_info, rcu));
}

/**
 * ecryptfs_d_release
 * @dentry: The ecryptfs dentry
 *
 * Called when a dentry is really deallocated.
 */
static void ecryptfs_d_release(struct dentry *dentry)
{
	struct ecryptfs_dentry_info *p = dentry->d_fsdata;
	if (p) {
		path_put(&p->lower_path);
		call_rcu(&p->rcu, ecryptfs_dentry_free_rcu);
	}
}

const struct dentry_operations ecryptfs_dops = {
	.d_revalidate = ecryptfs_d_revalidate,
	.d_release = ecryptfs_d_release,
};
da634a21b1200853fe82ba67d6571f2beabe'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?id=5e17da634a21b1200853fe82ba67d6571f2beabe'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4?id=5e17da634a21b1200853fe82ba67d6571f2beabe'>ipv4</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/fib_semantics.c?id=5e17da634a21b1200853fe82ba67d6571f2beabe'>fib_semantics.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/fib_semantics.c?id=5e17da634a21b1200853fe82ba67d6571f2beabe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-08 15:25:18 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/fib_semantics.c?id=982acb97560c8118c2109504a22b0d78a580547d'>ipv4: fib: Notify about nexthop status changes</a></td><td>Ido Schimmel</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+33</span></td></tr>