Release 4.10 fs/ecryptfs/inode.c

/**
 * eCryptfs: Linux filesystem encryption layer
 *
 * Copyright (C) 1997-2004 Erez Zadok
 * Copyright (C) 2001-2004 Stony Brook University
 * Copyright (C) 2004-2007 International Business Machines Corp.
 *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
 *              Michael C. Thompsion <mcthomps@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/file.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/fs_stack.h>
#include <linux/slab.h>
#include <linux/xattr.h>
#include <asm/unaligned.h>
#include "ecryptfs_kernel.h"



static struct dentry *lock_parent(struct dentry *dentry)
{
	struct dentry *dir;

	dir = dget_parent(dentry);
	inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
	return dir;
}

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michael halcrow
michael halcrow
31
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david howells
david howells
3
7.89%
1
20.00%
peter zijlstra
peter zijlstra
2
5.26%
1
20.00%
al viro
al viro
1
2.63%
1
20.00%
miklos szeredi
miklos szeredi
1
2.63%
1
20.00%
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38
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5
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static void unlock_dir(struct dentry *dir)
{
	inode_unlock(d_inode(dir));
	dput(dir);
}

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michael halcrow
michael halcrow
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33.33%
david howells
david howells
3
12.50%
1
33.33%
al viro
al viro
1
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1
33.33%
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24
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static int ecryptfs_inode_test(struct inode *inode, void *lower_inode)
{
	return ecryptfs_inode_to_lower(inode) == lower_inode;
}

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tyler hicks
tyler hicks
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himangi saraogi
himangi saraogi
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static int ecryptfs_inode_set(struct inode *inode, void *opaque)
{
	struct inode *lower_inode = opaque;

	ecryptfs_set_inode_lower(inode, lower_inode);
	fsstack_copy_attr_all(inode, lower_inode);
	/* i_size will be overwritten for encrypted regular files */
	fsstack_copy_inode_size(inode, lower_inode);
	inode->i_ino = lower_inode->i_ino;
	inode->i_version++;
	inode->i_mapping->a_ops = &ecryptfs_aops;

	if (S_ISLNK(inode->i_mode))
		inode->i_op = &ecryptfs_symlink_iops;
	else if (S_ISDIR(inode->i_mode))
		inode->i_op = &ecryptfs_dir_iops;
	else
		inode->i_op = &ecryptfs_main_iops;

	if (S_ISDIR(inode->i_mode))
		inode->i_fop = &ecryptfs_dir_fops;
	else if (special_file(inode->i_mode))
		init_special_inode(inode, inode->i_mode, inode->i_rdev);
	else
		inode->i_fop = &ecryptfs_main_fops;

	return 0;
}

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tyler hicks
tyler hicks
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static struct inode *__ecryptfs_get_inode(struct inode *lower_inode,
					  struct super_block *sb)
{
	struct inode *inode;

	if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb))
		return ERR_PTR(-EXDEV);
	if (!igrab(lower_inode))
		return ERR_PTR(-ESTALE);
	inode = iget5_locked(sb, (unsigned long)lower_inode,
			     ecryptfs_inode_test, ecryptfs_inode_set,
			     lower_inode);
	if (!inode) {
		iput(lower_inode);
		return ERR_PTR(-EACCES);
	}
	if (!(inode->i_state & I_NEW))
		iput(lower_inode);

	return inode;
}

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tyler hicks
tyler hicks
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struct inode *ecryptfs_get_inode(struct inode *lower_inode,
				 struct super_block *sb)
{
	struct inode *inode = __ecryptfs_get_inode(lower_inode, sb);

	if (!IS_ERR(inode) && (inode->i_state & I_NEW))
		unlock_new_inode(inode);

	return inode;
}

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tyler hicks
tyler hicks
53
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53
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/**
 * ecryptfs_interpose
 * @lower_dentry: Existing dentry in the lower filesystem
 * @dentry: ecryptfs' dentry
 * @sb: ecryptfs's super_block
 *
 * Interposes upper and lower dentries.
 *
 * Returns zero on success; non-zero otherwise
 */


static int ecryptfs_interpose(struct dentry *lower_dentry,
			      struct dentry *dentry, struct super_block *sb)
{
	struct inode *inode = ecryptfs_get_inode(d_inode(lower_dentry), sb);

	if (IS_ERR(inode))
		return PTR_ERR(inode);
	d_instantiate(dentry, inode);

	return 0;
}

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tyler hicks
tyler hicks
56
94.92%
2
66.67%
david howells
david howells
3
5.08%
1
33.33%
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59
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100.00%



static int ecryptfs_do_unlink(struct inode *dir, struct dentry *dentry,
			      struct inode *inode)
{
	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
	struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
	struct dentry *lower_dir_dentry;
	int rc;

	dget(lower_dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	rc = vfs_unlink(lower_dir_inode, lower_dentry, NULL);
	if (rc) {
		printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
		goto out_unlock;
	}
	fsstack_copy_attr_times(dir, lower_dir_inode);
	set_nlink(inode, ecryptfs_inode_to_lower(inode)->i_nlink);
	inode->i_ctime = dir->i_ctime;
	d_drop(dentry);
out_unlock:
	unlock_dir(lower_dir_dentry);
	dput(lower_dentry);
	return rc;
}

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tyler hicks
tyler hicks
134
98.53%
1
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j. bruce fields
j. bruce fields
2
1.47%
1
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136
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/**
 * ecryptfs_do_create
 * @directory_inode: inode of the new file's dentry's parent in ecryptfs
 * @ecryptfs_dentry: New file's dentry in ecryptfs
 * @mode: The mode of the new file
 *
 * Creates the underlying file and the eCryptfs inode which will link to
 * it. It will also update the eCryptfs directory inode to mimic the
 * stat of the lower directory inode.
 *
 * Returns the new eCryptfs inode on success; an ERR_PTR on error condition
 */

static struct inode *

ecryptfs_do_create(struct inode *directory_inode,
		   struct dentry *ecryptfs_dentry, umode_t mode)
{
	int rc;
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	struct inode *inode;

	lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	rc = vfs_create(d_inode(lower_dir_dentry), lower_dentry, mode, true);
	if (rc) {
		printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
		       "rc = [%d]\n", __func__, rc);
		inode = ERR_PTR(rc);
		goto out_lock;
	}
	inode = __ecryptfs_get_inode(d_inode(lower_dentry),
				     directory_inode->i_sb);
	if (IS_ERR(inode)) {
		vfs_unlink(d_inode(lower_dir_dentry), lower_dentry, NULL);
		goto out_lock;
	}
	fsstack_copy_attr_times(directory_inode, d_inode(lower_dir_dentry));
	fsstack_copy_inode_size(directory_inode, d_inode(lower_dir_dentry));
out_lock:
	unlock_dir(lower_dir_dentry);
	return inode;
}

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michael halcrow
michael halcrow
102
62.20%
3
25.00%
tyler hicks
tyler hicks
31
18.90%
2
16.67%
david howells
david howells
15
9.15%
1
8.33%
josef 'jeff' sipek
josef 'jeff' sipek
8
4.88%
1
8.33%
al viro
al viro
5
3.05%
3
25.00%
j. bruce fields
j. bruce fields
2
1.22%
1
8.33%
harvey harrison
harvey harrison
1
0.61%
1
8.33%
Total
164
100.00%
12
100.00%

/**
 * ecryptfs_initialize_file
 *
 * Cause the file to be changed from a basic empty file to an ecryptfs
 * file with a header and first data page.
 *
 * Returns zero on success
 */


int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
			     struct inode *ecryptfs_inode)
{
	struct ecryptfs_crypt_stat *crypt_stat =
		&ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
	int rc = 0;

	if (S_ISDIR(ecryptfs_inode->i_mode)) {
		ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
		crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
		goto out;
	}
	ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n");
	rc = ecryptfs_new_file_context(ecryptfs_inode);
	if (rc) {
		ecryptfs_printk(KERN_ERR, "Error creating new file "
				"context; rc = [%d]\n", rc);
		goto out;
	}
	rc = ecryptfs_get_lower_file(ecryptfs_dentry, ecryptfs_inode);
	if (rc) {
		printk(KERN_ERR "%s: Error attempting to initialize "
			"the lower file for the dentry with name "
			"[%pd]; rc = [%d]\n", __func__,
			ecryptfs_dentry, rc);
		goto out;
	}
	rc = ecryptfs_write_metadata(ecryptfs_dentry, ecryptfs_inode);
	if (rc)
		printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc);
	ecryptfs_put_lower_file(ecryptfs_inode);
out:
	return rc;
}

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michael halcrow
michael halcrow
139
87.42%
5
55.56%
tyler hicks
tyler hicks
19
11.95%
3
33.33%
david howells
david howells
1
0.63%
1
11.11%
Total
159
100.00%
9
100.00%

/**
 * ecryptfs_create
 * @dir: The inode of the directory in which to create the file.
 * @dentry: The eCryptfs dentry
 * @mode: The mode of the new file.
 *
 * Creates a new file.
 *
 * Returns zero on success; non-zero on error condition
 */

static int

ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
		umode_t mode, bool excl)
{
	struct inode *ecryptfs_inode;
	int rc;

	ecryptfs_inode = ecryptfs_do_create(directory_inode, ecryptfs_dentry,
					    mode);
	if (IS_ERR(ecryptfs_inode)) {
		ecryptfs_printk(KERN_WARNING, "Failed to create file in"
				"lower filesystem\n");
		rc = PTR_ERR(ecryptfs_inode);
		goto out;
	}
	/* At this point, a file exists on "disk"; we need to make sure
         * that this on disk file is prepared to be an ecryptfs file */
	rc = ecryptfs_initialize_file(ecryptfs_dentry, ecryptfs_inode);
	if (rc) {
		ecryptfs_do_unlink(directory_inode, ecryptfs_dentry,
				   ecryptfs_inode);
		iget_failed(ecryptfs_inode);
		goto out;
	}
	unlock_new_inode(ecryptfs_inode);
	d_instantiate(ecryptfs_dentry, ecryptfs_inode);
out:
	return rc;
}

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michael halcrow
michael halcrow
61
51.69%
1
14.29%
tyler hicks
tyler hicks
49
41.53%
2
28.57%
al viro
al viro
8
6.78%
4
57.14%
Total
118
100.00%
7
100.00%



static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode)
{
	struct ecryptfs_crypt_stat *crypt_stat;
	int rc;

	rc = ecryptfs_get_lower_file(dentry, inode);
	if (rc) {
		printk(KERN_ERR "%s: Error attempting to initialize "
			"the lower file for the dentry with name "
			"[%pd]; rc = [%d]\n", __func__,
			dentry, rc);
		return rc;
	}

	crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
	/* TODO: lock for crypt_stat comparison */
	if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
		ecryptfs_set_default_sizes(crypt_stat);

	rc = ecryptfs_read_and_validate_header_region(inode);
	ecryptfs_put_lower_file(inode);
	if (rc) {
		rc = ecryptfs_read_and_validate_xattr_region(dentry, inode);
		if (!rc)
			crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR;
	}

	/* Must return 0 to allow non-eCryptfs files to be looked up, too */
	return 0;
}

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tyler hicks
tyler hicks
124
99.20%
1
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david howells
david howells
1
0.80%
1
50.00%
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125
100.00%
2
100.00%

/**
 * ecryptfs_lookup_interpose - Dentry interposition for a lookup
 */


static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry,
				     struct dentry *lower_dentry)
{
	struct inode *inode, *lower_inode = d_inode(lower_dentry);
	struct ecryptfs_dentry_info *dentry_info;
	struct vfsmount *lower_mnt;
	int rc = 0;

	dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
	if (!dentry_info) {
		printk(KERN_ERR "%s: Out of memory whilst attempting "
		       "to allocate ecryptfs_dentry_info struct\n",
			__func__);
		dput(lower_dentry);
		return ERR_PTR(-ENOMEM);
	}

	lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
	fsstack_copy_attr_atime(d_inode(dentry->d_parent),
				d_inode(lower_dentry->d_parent));
	BUG_ON(!d_count(lower_dentry));

	ecryptfs_set_dentry_private(dentry, dentry_info);
	dentry_info->lower_path.mnt = lower_mnt;
	dentry_info->lower_path.dentry = lower_dentry;

	if (d_really_is_negative(lower_dentry)) {
		/* We want to add because we couldn't find in lower */
		d_add(dentry, NULL);
		return NULL;
	}
	inode = __ecryptfs_get_inode(lower_inode, dentry->d_sb);
	if (IS_ERR(inode)) {
		printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
		       __func__, PTR_ERR(inode));
		return ERR_CAST(inode);
	}
	if (S_ISREG(inode->i_mode)) {
		rc = ecryptfs_i_size_read(dentry, inode);
		if (rc) {
			make_bad_inode(inode);
			return ERR_PTR(rc);
		}
	}

	if (inode->i_state & I_NEW)
		unlock_new_inode(inode);
	return d_splice_alias(inode, dentry);
}

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michael halcrow
michael halcrow
101
38.70%
6
35.29%
tyler hicks
tyler hicks
77
29.50%
5
29.41%
al viro
al viro
73
27.97%
4
23.53%
david howells
david howells
9
3.45%
1
5.88%
josef 'jeff' sipek
josef 'jeff' sipek
1
0.38%
1
5.88%
Total
261
100.00%
17
100.00%

/**
 * ecryptfs_lookup
 * @ecryptfs_dir_inode: The eCryptfs directory inode
 * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
 * @flags: lookup flags
 *
 * Find a file on disk. If the file does not exist, then we'll add it to the
 * dentry cache and continue on to read it from the disk.
 */


static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
				      struct dentry *ecryptfs_dentry,
				      unsigned int flags)
{
	char *encrypted_and_encoded_name = NULL;
	struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
	struct dentry *lower_dir_dentry, *lower_dentry;
	const char *name = ecryptfs_dentry->d_name.name;
	size_t len = ecryptfs_dentry->d_name.len;
	struct dentry *res;
	int rc = 0;

	lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);

	mount_crypt_stat = &ecryptfs_superblock_to_private(
				ecryptfs_dentry->d_sb)->mount_crypt_stat;
	if (mount_crypt_stat
	    && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)) {
		rc = ecryptfs_encrypt_and_encode_filename(
			&encrypted_and_encoded_name, &len,
			mount_crypt_stat, name, len);
		if (rc) {
			printk(KERN_ERR "%s: Error attempting to encrypt and encode "
			       "filename; rc = [%d]\n", __func__, rc);
			return ERR_PTR(rc);
		}
		name = encrypted_and_encoded_name;
	}

	lower_dentry = lookup_one_len_unlocked(name, lower_dir_dentry, len);
	if (IS_ERR(lower_dentry)) {
		ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
				"[%ld] on lower_dentry = [%s]\n", __func__,
				PTR_ERR(lower_dentry),
				name);
		res = ERR_CAST(lower_dentry);
	} else {
		res = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry);
	}
	kfree(encrypted_and_encoded_name);
	return res;
}

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michael halcrow
michael halcrow
146
68.22%
3
25.00%
al viro
al viro
50
23.36%
5
41.67%
tyler hicks
tyler hicks
18
8.41%
4
33.33%
Total
214
100.00%
12
100.00%



static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
			 struct dentry *new_dentry)
{
	struct dentry *lower_old_dentry;
	struct dentry *lower_new_dentry;
	struct dentry *lower_dir_dentry;
	u64 file_size_save;
	int rc;

	file_size_save = i_size_read(d_inode(old_dentry));
	lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
	lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
	dget(lower_old_dentry);
	dget(lower_new_dentry);
	lower_dir_dentry = lock_parent(lower_new_dentry);
	rc = vfs_link(lower_old_dentry, d_inode(lower_dir_dentry),
		      lower_new_dentry, NULL);
	if (rc || d_really_is_negative(lower_new_dentry))
		goto out_lock;
	rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb);
	if (rc)
		goto out_lock;
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	fsstack_copy_inode_size(dir, d_inode(lower_dir_dentry));
	set_nlink(d_inode(old_dentry),
		  ecryptfs_inode_to_lower(d_inode(old_dentry))->i_nlink);
	i_size_write(d_inode(new_dentry), file_size_save);
out_lock:
	unlock_dir(lower_dir_dentry);
	dput(lower_new_dentry);
	dput(lower_old_dentry);
	return rc;
}

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michael halcrow
michael halcrow
161
80.90%
1
20.00%
david howells
david howells
24
12.06%
1
20.00%
josef 'jeff' sipek
josef 'jeff' sipek
8
4.02%
1
20.00%
miklos szeredi
miklos szeredi
4
2.01%
1
20.00%
j. bruce fields
j. bruce fields
2
1.01%
1
20.00%
Total
199
100.00%
5
100.00%



static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
{
	return ecryptfs_do_unlink(dir, dentry, d_inode(dentry));
}

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michael halcrow
michael halcrow
23
79.31%
1
25.00%
david howells
david howells
3
10.34%
1
25.00%
tyler hicks
tyler hicks
2
6.90%
1
25.00%
miklos szeredi
miklos szeredi
1
3.45%
1
25.00%
Total
29
100.00%
4
100.00%



static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
			    const char *symname)
{
	int rc;
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	char *encoded_symname;
	size_t encoded_symlen;
	struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	dget(lower_dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	mount_crypt_stat = &ecryptfs_superblock_to_private(
		dir->i_sb)->mount_crypt_stat;
	rc = ecryptfs_encrypt_and_encode_filename(&encoded_symname,
						  &encoded_symlen,
						  mount_crypt_stat, symname,
						  strlen(symname));
	if (rc)
		goto out_lock;
	rc = vfs_symlink(d_inode(lower_dir_dentry), lower_dentry,
			 encoded_symname);
	kfree(encoded_symname);
	if (rc || d_really_is_negative(lower_dentry))
		goto out_lock;
	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
	if (rc)
		goto out_lock;
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	fsstack_copy_inode_size(dir, d_inode(lower_dir_dentry));
out_lock:
	unlock_dir(lower_dir_dentry);
	dput(lower_dentry);
	if (d_really_is_negative(dentry))
		d_drop(dentry);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michael halcrow
michael halcrow
181
88.73%
2
50.00%
david howells
david howells
15
7.35%
1
25.00%
josef 'jeff' sipek
josef 'jeff' sipek
8
3.92%
1
25.00%
Total
204
100.00%
4
100.00%



static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
	int rc;
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	rc = vfs_mkdir(d_inode(lower_dir_dentry), lower_dentry, mode);
	if (rc || d_really_is_negative(lower_dentry))
		goto out;
	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
	if (rc)
		goto out;
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	fsstack_copy_inode_size(dir, d_inode(lower_dir_dentry));
	set_nlink(dir, d_inode(lower_dir_dentry)->i_nlink);
out:
	unlock_dir(lower_dir_dentry);
	if (d_really_is_negative(dentry))
		d_drop(dentry);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michael halcrow
michael halcrow
115
78.77%
1
20.00%
david howells
david howells
18
12.33%
1
20.00%
josef 'jeff' sipek
josef 'jeff' sipek
8
5.48%
1
20.00%
miklos szeredi
miklos szeredi
4
2.74%
1
20.00%
al viro
al viro
1
0.68%
1
20.00%
Total
146
100.00%
5
100.00%



static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	int rc;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	dget(dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	dget(lower_dentry);
	rc = vfs_rmdir(d_inode(lower_dir_dentry), lower_dentry);
	dput(lower_dentry);
	if (!rc && d_really_is_positive(dentry))
		clear_nlink(d_inode(dentry));
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	set_nlink(dir, d_inode(lower_dir_dentry)->i_nlink);
	unlock_dir(lower_dir_dentry);
	if (!rc)
		d_drop(dentry);
	dput(dentry);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michael halcrow
michael halcrow
101
75.94%
2
33.33%
david howells
david howells
15
11.28%
1
16.67%
tyler hicks
tyler hicks
12
9.02%
1
16.67%
miklos szeredi
miklos szeredi
4
3.01%
1
16.67%
josef 'jeff' sipek
josef 'jeff' sipek
1
0.75%
1
16.67%
Total
133
100.00%
6
100.00%


static int

ecryptfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
{
	int rc;
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	rc = vfs_mknod(d_inode(lower_dir_dentry), lower_dentry, mode, dev);
	if (rc || d_really_is_negative(lower_dentry))
		goto out;
	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
	if (rc)
		goto out;
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	fsstack_copy_inode_size(dir, d_inode(lower_dir_dentry));
out:
	unlock_dir(lower_dir_dentry);
	if (d_really_is_negative(dentry))
		d_drop(dentry);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michael halcrow
michael halcrow
115
82.73%
1
25.00%
david howells
david howells
15
10.79%
1
25.00%
josef 'jeff' sipek
josef 'jeff' sipek
8
5.76%
1
25.00%
al viro
al viro
1
0.72%
1
25.00%
Total
139
100.00%
4
100.00%


static int

ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
		struct inode *new_dir, struct dentry *new_dentry,
		unsigned int flags)
{
	int rc;
	struct dentry *lower_old_dentry;
	struct dentry *lower_new_dentry;
	struct dentry *lower_old_dir_dentry;
	struct dentry *lower_new_dir_dentry;
	struct dentry *trap = NULL;
	struct inode *target_inode;

	if (flags)
		return -EINVAL;

	lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
	lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
	dget(lower_old_dentry);
	dget(lower_new_dentry);
	lower_old_dir_dentry = dget_parent(lower_old_dentry);
	lower_new_dir_dentry = dget_parent(lower_new_dentry);
	target_inode = d_inode(new_dentry);
	trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
	/* source should not be ancestor of target */
	if (trap == lower_old_dentry) {
		rc = -EINVAL;
		goto out_lock;
	}
	/* target should not be ancestor of source */
	if (trap == lower_new_dentry) {
		rc = -ENOTEMPTY;
		goto out_lock;
	}
	rc = vfs_rename(d_inode(lower_old_dir_dentry), lower_old_dentry,
			d_inode(lower_new_dir_dentry), lower_new_dentry,
			NULL, 0);
	if (rc)
		goto out_lock;
	if (target_inode)
		fsstack_copy_attr_all(target_inode,
				      ecryptfs_inode_to_lower(target_inode));
	fsstack_copy_attr_all(new_dir, d_inode(lower_new_dir_dentry));
	if (new_dir != old_dir)
		fsstack_copy_attr_all(old_dir, d_inode(lower_old_dir_dentry));
out_lock:
	unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
	dput(lower_new_dir_dentry);
	dput(lower_old_dir_dentry);
	dput(lower_new_dentry);
	dput(lower_old_dentry);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michael halcrow
michael halcrow
162
61.60%
2
20.00%
erez zadok
erez zadok
43
16.35%
1
10.00%
tyler hicks
tyler hicks
25
9.51%
2
20.00%
david howells
david howells
15
5.70%
1
10.00%
miklos szeredi
miklos szeredi
14
5.32%
2
20.00%
j. bruce fields
j. bruce fields
2
0.76%
1
10.00%
josef 'jeff' sipek
josef 'jeff' sipek
2
0.76%
1
10.00%
Total
263
100.00%
10
100.00%



static char *ecryptfs_readlink_lower(struct dentry *dentry, size_t *bufsiz)
{
	DEFINE_DELAYED_CALL(done);
	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
	const char *link;
	char *buf;
	int rc;

	link = vfs_get_link(lower_dentry, &done);
	if (IS_ERR(link))
		return ERR_CAST(link);

	rc = ecryptfs_decode_and_decrypt_filename(&buf, bufsiz, dentry->d_sb,
						  link, strlen(link)