audit: overhaul __audit_inode_child to accomodate retrying
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>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index b11f517..3df643d 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -457,6 +457,8 @@
#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_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 @@
__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 @@
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)
{ }
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 9c28471..0fbfb46 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -109,7 +109,7 @@
if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- audit_inode_child(new_dir, moved);
+ audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
}
/*
@@ -155,7 +155,7 @@
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- audit_inode_child(inode, dentry);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
@@ -168,7 +168,7 @@
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
{
fsnotify_link_count(inode);
- audit_inode_child(dir, new_dentry);
+ audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
}
@@ -181,7 +181,7 @@
__u32 mask = (FS_CREATE | FS_ISDIR);
struct inode *d_inode = dentry->d_inode;
- audit_inode_child(inode, dentry);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}