[PATCH v5 07/21] evm: evm_inode_post_removexattr

Mimi Zohar
2011-05-16T14:46:41Z

When an EVM protected extended attribute is removed, update 'security.evm'.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
---
fs/xattr.c | 5 ++++-
include/linux/evm.h | 9 +++++++++
2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index 6da0c8c..13814fe 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -14,6 +14,7 @@
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/security.h>
+#include <linux/evm.h>
#include <linux/syscalls.h>
#include <linux/module.h>
#include <linux/fsnotify.h>
@@ -294,8 +295,10 @@ vfs_removexattr(struct dentry *dentry, const char *name)
error = inode->i_op->removexattr(dentry, name);
mutex_unlock(&inode->i_mutex);

- if (!error)
+ if (!error) {
fsnotify_xattr(dentry);
+ evm_inode_post_removexattr(dentry, name);
+ }
return error;
}
EXPORT_SYMBOL_GPL(vfs_removexattr);
diff --git a/include/linux/evm.h b/include/linux/evm.h
index 8b4e9e3..a730782 100644
--- a/include/linux/evm.h
+++ b/include/linux/evm.h
@@ -22,6 +22,8 @@ extern void evm_inode_post_setxattr(struct dentry *dentry,
const void *xattr_value,
size_t xattr_value_len);
extern int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name);
+extern void evm_inode_post_removexattr(struct dentry *dentry,
+ const char *xattr_name);
#else
#ifdef CONFIG_INTEGRITY
static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
@@ -52,5 +54,12 @@ static inline int evm_inode_removexattr(struct dentry *dentry,
{
return 0;
}
+
+static inline void evm_inode_post_removexattr(struct dentry *dentry,
+ const char *xattr_name)
+{
+ return;
+}
+
#endif /* CONFIG_EVM_H */
#endif /* LINUX_EVM_H */
--
1.7.3.4