cregit-Linux how code gets into the kernel

Release 4.18 fs/ecryptfs/dentry.c

Directory: fs/ecryptfs
/**
 * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Halcrow4543.69%222.22%
Tyler Hicks2726.21%222.22%
Al Viro1817.48%222.22%
David Howells87.77%111.11%
Nicholas Piggin43.88%111.11%
Josef 'Jeff' Sipek10.97%111.11%
Total103100.00%9100.00%

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)); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro26100.00%1100.00%
Total26100.00%1100.00%

/** * 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); } }

Contributors

PersonTokensPropCommitsCommitProp
Michael Halcrow2352.27%375.00%
Al Viro2147.73%125.00%
Total44100.00%4100.00%

const struct dentry_operations ecryptfs_dops = { .d_revalidate = ecryptfs_d_revalidate, .d_release = ecryptfs_d_release, };

Overall Contributors

PersonTokensPropCommitsCommitProp
Michael Halcrow10347.69%430.77%
Al Viro6731.02%323.08%
Tyler Hicks2712.50%215.38%
David Howells83.70%17.69%
Josef 'Jeff' Sipek41.85%17.69%
Nicholas Piggin41.85%17.69%
Tejun Heo31.39%17.69%
Total216100.00%13100.00%
Directory: fs/ecryptfs
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.