From 0747fdb2bd59d9404ae2345cbddd7d837c5c4648 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 16 Jun 2013 20:05:38 +0400
Subject: [PATCH] ecryptfs: switch ecryptfs_decode_and_decrypt_filename() from
 dentry to sb

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/ecryptfs/crypto.c          | 5 ++---
 fs/ecryptfs/ecryptfs_kernel.h | 2 +-
 fs/ecryptfs/file.c            | 9 ++++-----
 fs/ecryptfs/inode.c           | 2 +-
 4 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index f71ec125290d..cfa109a4d5a2 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -2243,12 +2243,11 @@ out:
  */
 int ecryptfs_decode_and_decrypt_filename(char **plaintext_name,
 					 size_t *plaintext_name_size,
-					 struct dentry *ecryptfs_dir_dentry,
+					 struct super_block *sb,
 					 const char *name, size_t name_size)
 {
 	struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
-		&ecryptfs_superblock_to_private(
-			ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
+		&ecryptfs_superblock_to_private(sb)->mount_crypt_stat;
 	char *decoded_name;
 	size_t decoded_name_size;
 	size_t packet_size;
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index f622a733f7ad..df19d34a033b 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -575,7 +575,7 @@ int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
 			     struct inode *ecryptfs_inode);
 int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
 					 size_t *decrypted_name_size,
-					 struct dentry *ecryptfs_dentry,
+					 struct super_block *sb,
 					 const char *name, size_t name_size);
 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
 int ecryptfs_encrypt_and_encode_filename(
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 9aa05e08060b..24f1105fda3a 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -70,7 +70,7 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb,
 struct ecryptfs_getdents_callback {
 	struct dir_context ctx;
 	struct dir_context *caller;
-	struct dentry *dentry;
+	struct super_block *sb;
 	int filldir_called;
 	int entries_written;
 };
@@ -88,7 +88,7 @@ ecryptfs_filldir(void *dirent, const char *lower_name, int lower_namelen,
 
 	buf->filldir_called++;
 	rc = ecryptfs_decode_and_decrypt_filename(&name, &name_size,
-						  buf->dentry, lower_name,
+						  buf->sb, lower_name,
 						  lower_namelen);
 	if (rc) {
 		printk(KERN_ERR "%s: Error attempting to decode and decrypt "
@@ -114,15 +114,14 @@ static int ecryptfs_readdir(struct file *file, struct dir_context *ctx)
 {
 	int rc;
 	struct file *lower_file;
-	struct inode *inode;
+	struct inode *inode = file_inode(file);
 	struct ecryptfs_getdents_callback buf = {
 		.ctx.actor = ecryptfs_filldir,
 		.caller = ctx,
-		.dentry = file->f_path.dentry
+		.sb = inode->i_sb,
 	};
 	lower_file = ecryptfs_file_to_lower(file);
 	lower_file->f_pos = ctx->pos;
-	inode = file_inode(file);
 	rc = iterate_dir(lower_file, &buf.ctx);
 	ctx->pos = buf.ctx.pos;
 	if (rc < 0)
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5eab400e2590..a2f2bb2c256d 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -679,7 +679,7 @@ static int ecryptfs_readlink_lower(struct dentry *dentry, char **buf,
 	set_fs(old_fs);
 	if (rc < 0)
 		goto out;
-	rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry,
+	rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry->d_sb,
 						  lower_buf, rc);
 out:
 	kfree(lower_buf);