eCryptfs: set up and destroy persistent lower file
This patch sets up and destroys the persistent lower file for each eCryptfs
inode.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 7192a81..c746b5d 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -119,10 +119,23 @@
}
rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode,
ecryptfs_dentry, mode, nd);
- if (unlikely(rc)) {
- ecryptfs_printk(KERN_ERR,
- "Failure to create underlying file\n");
- goto out_lock;
+ if (rc) {
+ struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode;
+ struct ecryptfs_inode_info *inode_info =
+ ecryptfs_inode_to_private(ecryptfs_inode);
+
+ printk(KERN_WARNING "%s: Error creating underlying file; "
+ "rc = [%d]; checking for existing\n", __FUNCTION__, rc);
+ if (inode_info) {
+ mutex_lock(&inode_info->lower_file_mutex);
+ if (!inode_info->lower_file) {
+ mutex_unlock(&inode_info->lower_file_mutex);
+ printk(KERN_ERR "%s: Failure to set underlying "
+ "file; rc = [%d]\n", __FUNCTION__, rc);
+ goto out_lock;
+ }
+ mutex_unlock(&inode_info->lower_file_mutex);
+ }
}
rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry,
directory_inode->i_sb, 0);
@@ -252,6 +265,8 @@
{
int rc;
+ /* ecryptfs_do_create() calls ecryptfs_interpose(), which opens
+ * the crypt_stat->lower_file (persistent file) */
rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd);
if (unlikely(rc)) {
ecryptfs_printk(KERN_WARNING, "Failed to create file in"