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Commit 975d2943 authored by Mimi Zohar's avatar Mimi Zohar
Browse files

evm: imbed evm_inode_post_setattr 



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

Signed-off-by: default avatarMimi Zohar <zohar@us.ibm.com>
Acked-by: default avatarSerge Hallyn <serge.hallyn@ubuntu.com>
parent c7b87de2

fs/attr.c

+4 −1
Original line number Diff line number Diff line
@@ -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
@@ -243,8 +244,10 @@ 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;

}

include/linux/evm.h

+6 −0
Original line number Diff line number Diff line
@@ -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)

{