C++ (Cpp) ecryptfs_decode_filename Examples

Example #1

File: file.c Project: maraz/linux-2.6

/* Inspired by generic filldir in fs/readir.c */
static int
ecryptfs_filldir(void *dirent, const char *name, int namelen, loff_t offset,
		 u64 ino, unsigned int d_type)
{
	struct ecryptfs_crypt_stat *crypt_stat;
	struct ecryptfs_getdents_callback *buf =
	    (struct ecryptfs_getdents_callback *)dirent;
	int rc;
	int decoded_length;
	char *decoded_name;

	crypt_stat = ecryptfs_dentry_to_private(buf->dentry)->crypt_stat;
	buf->filldir_called++;
	decoded_length = ecryptfs_decode_filename(crypt_stat, name, namelen,
						  &decoded_name);
	if (decoded_length < 0) {
		rc = decoded_length;
		goto out;
	}
	rc = buf->filldir(buf->dirent, decoded_name, decoded_length, offset,
			  ino, d_type);
	kfree(decoded_name);
	if (rc >= 0)
		buf->entries_written++;
out:
	return rc;
}

Example #2

File: inode.c Project: deepikateriar/Onlive-Source-Backup

static int
ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz)
{
	int rc;
	struct dentry *lower_dentry;
	char *decoded_name;
	char *lower_buf;
	mm_segment_t old_fs;
	struct ecryptfs_crypt_stat *crypt_stat;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	if (!lower_dentry->d_inode->i_op ||
	    !lower_dentry->d_inode->i_op->readlink) {
		rc = -EINVAL;
		goto out;
	}
	/* Released in this function */
	lower_buf = kmalloc(bufsiz, GFP_KERNEL);
	if (lower_buf == NULL) {
		ecryptfs_printk(KERN_ERR, "Out of memory\n");
		rc = -ENOMEM;
		goto out;
	}
	old_fs = get_fs();
	set_fs(get_ds());
	ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ "
			"lower_dentry->d_name.name = [%s]\n",
			lower_dentry->d_name.name);
	rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
						   (char __user *)lower_buf,
						   bufsiz);
	set_fs(old_fs);
	if (rc >= 0) {
		crypt_stat = NULL;
		rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc,
					      &decoded_name);
		if (rc == -ENOMEM)
			goto out_free_lower_buf;
		if (rc > 0) {
			ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes "
					"to userspace: [%*s]\n", rc,
					decoded_name);
			if (copy_to_user(buf, decoded_name, rc))
				rc = -EFAULT;
		}
		kfree(decoded_name);
		fsstack_copy_attr_atime(dentry->d_inode,
					lower_dentry->d_inode);
	}
out_free_lower_buf:
	kfree(lower_buf);
out:
	return rc;
}