eCryptfs: Fix encrypted file name lookup regression

[mv-sheeva.git] / fs / ecryptfs / inode.c

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 6c55113e72222cf473f92b16277056561ebbf55d..3fbc94203380acf8e6095627ee610ff058df5f38 100644 (file)
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -349,7 +349,7 @@ out:
 
 /**
  * ecryptfs_new_lower_dentry
- * @ename: The name of the new dentry.
+ * @name: The name of the new dentry.
  * @lower_dir_dentry: Parent directory of the new dentry.
  * @nd: nameidata from last lookup.
  *
@@ -386,20 +386,19 @@ ecryptfs_new_lower_dentry(struct qstr *name, struct dentry *lower_dir_dentry,
  * ecryptfs_lookup_one_lower
  * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
  * @lower_dir_dentry: lower parent directory
+ * @name: lower file name
  *
  * Get the lower dentry from vfs. If lower dentry does not exist yet,
  * create it.
  */
 static struct dentry *
 ecryptfs_lookup_one_lower(struct dentry *ecryptfs_dentry,
-                         struct dentry *lower_dir_dentry)
+                         struct dentry *lower_dir_dentry, struct qstr *name)
 {
        struct nameidata nd;
        struct vfsmount *lower_mnt;
-       struct qstr *name;
        int err;
 
-       name = &ecryptfs_dentry->d_name;
        lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(
                                    ecryptfs_dentry->d_parent));
        err = vfs_path_lookup(lower_dir_dentry, lower_mnt, name->name , 0, &nd);
@@ -434,6 +433,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
        size_t encrypted_and_encoded_name_size;
        struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
        struct dentry *lower_dir_dentry, *lower_dentry;
+       struct qstr lower_name;
        int rc = 0;
 
        ecryptfs_dentry->d_op = &ecryptfs_dops;
@@ -444,9 +444,17 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
                goto out_d_drop;
        }
        lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
-
+       lower_name.name = ecryptfs_dentry->d_name.name;
+       lower_name.len = ecryptfs_dentry->d_name.len;
+       lower_name.hash = ecryptfs_dentry->d_name.hash;
+       if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
+               rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
+                                                   &lower_name);
+               if (rc < 0)
+                       goto out_d_drop;
+       }
        lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
-                                                lower_dir_dentry);
+                                                lower_dir_dentry, &lower_name);
        if (IS_ERR(lower_dentry)) {
                rc = PTR_ERR(lower_dentry);
                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
@@ -471,8 +479,17 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
                       "filename; rc = [%d]\n", __func__, rc);
                goto out_d_drop;
        }
+       lower_name.name = encrypted_and_encoded_name;
+       lower_name.len = encrypted_and_encoded_name_size;
+       lower_name.hash = full_name_hash(lower_name.name, lower_name.len);
+       if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
+               rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
+                                                   &lower_name);
+               if (rc < 0)
+                       goto out_d_drop;
+       }
        lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
-                                                lower_dir_dentry);
+                                                lower_dir_dentry, &lower_name);
        if (IS_ERR(lower_dentry)) {
                rc = PTR_ERR(lower_dentry);
                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "