#include <linux/mount.h>
#include <linux/key.h>
#include <linux/seq_file.h>
+#include <linux/file.h>
#include <linux/crypto.h>
#include "ecryptfs_kernel.h"
*/
static struct inode *ecryptfs_alloc_inode(struct super_block *sb)
{
- struct ecryptfs_inode_info *ecryptfs_inode;
+ struct ecryptfs_inode_info *inode_info;
struct inode *inode = NULL;
- ecryptfs_inode = kmem_cache_alloc(ecryptfs_inode_info_cache,
- GFP_KERNEL);
- if (unlikely(!ecryptfs_inode))
+ inode_info = kmem_cache_alloc(ecryptfs_inode_info_cache, GFP_KERNEL);
+ if (unlikely(!inode_info))
goto out;
- ecryptfs_init_crypt_stat(&ecryptfs_inode->crypt_stat);
- inode = &ecryptfs_inode->vfs_inode;
+ ecryptfs_init_crypt_stat(&inode_info->crypt_stat);
+ mutex_init(&inode_info->lower_file_mutex);
+ inode_info->lower_file = NULL;
+ inode = &inode_info->vfs_inode;
out:
return inode;
}
* ecryptfs_destroy_inode
* @inode: The ecryptfs inode
*
- * This is used during the final destruction of the inode.
- * All allocation of memory related to the inode, including allocated
- * memory in the crypt_stat struct, will be released here.
+ * This is used during the final destruction of the inode. All
+ * allocation of memory related to the inode, including allocated
+ * memory in the crypt_stat struct, will be released here. This
+ * function also fput()'s the persistent file for the lower inode.
* There should be no chance that this deallocation will be missed.
*/
static void ecryptfs_destroy_inode(struct inode *inode)
struct ecryptfs_inode_info *inode_info;
inode_info = ecryptfs_inode_to_private(inode);
+ mutex_lock(&inode_info->lower_file_mutex);
+ if (inode_info->lower_file) {
+ struct dentry *lower_dentry =
+ inode_info->lower_file->f_dentry;
+
+ BUG_ON(!lower_dentry);
+ if (lower_dentry->d_inode) {
+ fput(inode_info->lower_file);
+ inode_info->lower_file = NULL;
+ d_drop(lower_dentry);
+ }
+ }
+ mutex_unlock(&inode_info->lower_file_mutex);
ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat);
kmem_cache_free(ecryptfs_inode_info_cache, inode_info);
}