[PATCH v5 08/21] evm: imbed evm_inode_post_setattr

Mimi Zohar
2011-05-16T14:47:00Z

Changing the inode's metadata may require the 'security.evm' extended
attribute to be re-calculated and updated.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
---
fs/attr.c | 5 ++++-
include/linux/evm.h | 6 ++++++
2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/fs/attr.c b/fs/attr.c
index 91dbe2a..b717f86 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -13,6 +13,7 @@
#include <linux/fsnotify.h>
#include <linux/fcntl.h>
#include <linux/security.h>
+#include <linux/evm.h>

/**
* inode_change_ok - check if attribute changes to an inode are allowed
@@ -236,8 +237,10 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
if (ia_valid & ATTR_SIZE)
up_write(&dentry->d_inode->i_alloc_sem);

- if (!error)
+ if (!error) {
fsnotify_change(dentry, ia_valid);
+ evm_inode_post_setattr(dentry, ia_valid);
+ }

return error;
}
diff --git a/include/linux/evm.h b/include/linux/evm.h
index a730782..33a9247 100644
--- a/include/linux/evm.h
+++ b/include/linux/evm.h
@@ -15,6 +15,7 @@ extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
const char *xattr_name,
void *xattr_value,
size_t xattr_value_len);
+extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
extern int evm_inode_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size);
extern void evm_inode_post_setxattr(struct dentry *dentry,
@@ -35,6 +36,11 @@ static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
}
#endif

+static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
+{
+ return;
+}
+
static inline int evm_inode_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size)
{
--
1.7.3.4