[PATCH v7 05/49] audit: add a new "type" field to audit_names struct

Jeff Layton
2012-10-02T00:17:13Z

For now, we just have two possibilities:

UNKNOWN: for a new audit_names record that we don't know anything about yet
NORMAL: for everything else

In later patches, we'll add other types so we can distinguish and update
records created under different circumstances.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
include/linux/audit.h | 5 +++++
kernel/auditsc.c | 15 ++++++++++-----
2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/include/linux/audit.h b/include/linux/audit.h
index 2d8b761..48c49eb 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -450,6 +450,11 @@ struct audit_field {
extern int __init audit_register_class(int class, unsigned *list);
extern int audit_classify_syscall(int abi, unsigned syscall);
extern int audit_classify_arch(int arch);
+
+/* audit_names->type values */
+#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
+#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
+
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ff58089..bd11d09 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -120,6 +120,7 @@ struct audit_names {
struct audit_cap_data fcap;
unsigned int fcap_ver;
int name_len; /* number of name's characters to log */
+ unsigned char type; /* record type */
bool name_put; /* call __putname() for this name */
/*
* This was an allocated audit_names and not from the array of
@@ -2009,7 +2010,8 @@ retry:
#endif
}

-static struct audit_names *audit_alloc_name(struct audit_context *context)
+static struct audit_names *audit_alloc_name(struct audit_context *context,
+ unsigned char type)
{
struct audit_names *aname;

@@ -2024,6 +2026,7 @@ static struct audit_names *audit_alloc_name(struct audit_context *context)
}

aname->ino = (unsigned long)-1;
+ aname->type = type;
list_add_tail(&aname->list, &context->names_list);

context->name_count++;
@@ -2054,7 +2057,7 @@ void __audit_getname(const char *name)
return;
}

- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
if (!n)
return;

@@ -2171,12 +2174,13 @@ void __audit_inode(const char *name, const struct dentry *dentry)

out_alloc:
/* unable to find the name from a previous getname() */
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
out:
handle_path(dentry);
audit_copy_inode(n, dentry, inode);
+ n->type = AUDIT_TYPE_NORMAL;
}

/**
@@ -2233,6 +2237,7 @@ void __audit_inode_child(const struct inode *parent,
audit_copy_inode(n, dentry, inode);
else
n->ino = (unsigned long)-1;
+ n->type = AUDIT_TYPE_NORMAL;
found_child = n->name;
goto add_names;
}
@@ -2240,14 +2245,14 @@ void __audit_inode_child(const struct inode *parent,

add_names:
if (!found_parent) {
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
audit_copy_inode(n, NULL, parent);
}

if (!found_child) {
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;

--
1.7.11.4