From 27992890b02d340198a3a22fc210d13684a41564 Mon Sep 17 00:00:00 2001
From: Roberto Sassu <roberto.sassu@polito.it>
Date: Wed, 3 Nov 2010 11:11:28 +0100
Subject: ecryptfs: test lower_file pointer when lower_file_mutex is locked
This patch prevents the lower_file pointer in the 'ecryptfs_inode_info'
structure to be checked when the mutex 'lower_file_mutex' is not locked.
Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
---
fs/ecryptfs/file.c | 16 +++++++---------
fs/ecryptfs/inode.c | 32 ++++++++++++++------------------
2 files changed, 21 insertions(+), 27 deletions(-)
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 679817e8248..99259f850e5 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -191,15 +191,13 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
| ECRYPTFS_ENCRYPTED);
}
mutex_unlock(&crypt_stat->cs_mutex);
- if (!ecryptfs_inode_to_private(inode)->lower_file) {
- rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
- if (rc) {
- printk(KERN_ERR "%s: Error attempting to initialize "
- "the persistent file for the dentry with name "
- "[%s]; rc = [%d]\n", __func__,
- ecryptfs_dentry->d_name.name, rc);
- goto out_free;
- }
+ rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+ if (rc) {
+ printk(KERN_ERR "%s: Error attempting to initialize "
+ "the persistent file for the dentry with name "
+ "[%s]; rc = [%d]\n", __func__,
+ ecryptfs_dentry->d_name.name, rc);
+ goto out_free;
}
if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_RDONLY)
&& !(file->f_flags & O_RDONLY)) {
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 64ff0233075..bd33f87a190 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -185,15 +185,13 @@ static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
"context; rc = [%d]\n", rc);
goto out;
}
- if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) {
- rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
- if (rc) {
- printk(KERN_ERR "%s: Error attempting to initialize "
- "the persistent file for the dentry with name "
- "[%s]; rc = [%d]\n", __func__,
- ecryptfs_dentry->d_name.name, rc);
- goto out;
- }
+ rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+ if (rc) {
+ printk(KERN_ERR "%s: Error attempting to initialize "
+ "the persistent file for the dentry with name "
+ "[%s]; rc = [%d]\n", __func__,
+ ecryptfs_dentry->d_name.name, rc);
+ goto out;
}
rc = ecryptfs_write_metadata(ecryptfs_dentry);
if (rc) {
@@ -302,15 +300,13 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
rc = -ENOMEM;
goto out;
}
- if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) {
- rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
- if (rc) {
- printk(KERN_ERR "%s: Error attempting to initialize "
- "the persistent file for the dentry with name "
- "[%s]; rc = [%d]\n", __func__,
- ecryptfs_dentry->d_name.name, rc);
- goto out_free_kmem;
- }
+ rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+ if (rc) {
+ printk(KERN_ERR "%s: Error attempting to initialize "
+ "the persistent file for the dentry with name "
+ "[%s]; rc = [%d]\n", __func__,
+ ecryptfs_dentry->d_name.name, rc);
+ goto out_free_kmem;
}
crypt_stat = &ecryptfs_inode_to_private(
ecryptfs_dentry->d_inode)->crypt_stat;
--
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