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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677// SPDX-License-Identifier: GPL-2.0-or-later/* * 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> */
#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 * @dir: inode of expected parent * @name: expected name * @dentry: dentry to revalidate * @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 inode *dir, const struct qstr *name, 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) { struct inode *lower_dir = ecryptfs_inode_to_lower(dir); struct name_snapshot n;
take_dentry_name_snapshot(&n, lower_dentry); rc = lower_dentry->d_op->d_revalidate(lower_dir, &n.name, lower_dentry, flags); release_dentry_name_snapshot(&n); }
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;}
/** * ecryptfs_d_release * @dentry: The ecryptfs dentry * * Called when a dentry is really deallocated. */static void ecryptfs_d_release(struct dentry *dentry){ dput(dentry->d_fsdata);}
const struct dentry_operations ecryptfs_dops = { .d_revalidate = ecryptfs_d_revalidate, .d_release = ecryptfs_d_release,};