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audit: overhaul __audit_inode_child to accomodate retrying

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In order to accomodate retrying path-based syscalls, we need to add a
new "type" argument to audit_inode_child. This will tell us whether
we're looking for a child entry that represents a create or a delete.

If we find a parent, don't automatically assume that we need to create a
new entry. Instead, use the information we have to try to find an
existing entry first. Update it if one is found and create a new one if
not.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton 2012-10-10 15:25:25 -04:00 • committed by Al Viro
parent e3d6b07b8b
commit 4fa6b5ecbf
5 changed files with 47 additions and 38 deletions
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16
include/linux/audit.h
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@ -457,6 +457,8 @@ extern int audit_classify_arch(int arch);
#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
#define AUDIT_TYPE_PARENT 2 /* a parent audit record */
#define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
#define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
@ -472,7 +474,8 @@ extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct dentry *dentry,
unsigned int parent);
extern void __audit_inode_child(const struct inode *parent,
const struct dentry *dentry);
const struct dentry *dentry,
const unsigned char type);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
@ -513,9 +516,10 @@ static inline void audit_inode(const char *name, const struct dentry *dentry,
__audit_inode(name, dentry, parent);
}
static inline void audit_inode_child(const struct inode *parent,
const struct dentry *dentry) {
const struct dentry *dentry,
const unsigned char type) {
if (unlikely(!audit_dummy_context()))
__audit_inode_child(parent, dentry);
__audit_inode_child(parent, dentry, type);
}
void audit_core_dumps(long signr);
@ -667,13 +671,15 @@ static inline void __audit_inode(const char *name, const struct dentry *dentry,
unsigned int parent)
{ }
static inline void __audit_inode_child(const struct inode *parent,
const struct dentry *dentry)
const struct dentry *dentry,
const unsigned char type)
{ }
static inline void audit_inode(const char *name, const struct dentry *dentry,
unsigned int parent)
{ }
static inline void audit_inode_child(const struct inode *parent,
const struct dentry *dentry)
const struct dentry *dentry,
const unsigned char type)
{ }
static inline void audit_core_dumps(long signr)
{ }