static int au_hin_alloc(struct au_hnotify *hn, struct inode *h_inode)
{
int err;
s32 wd;
struct inotify_watch *watch;
err = -EEXIST;
wd = inotify_find_watch(au_hin_handle, h_inode, &watch);
if (wd >= 0) {
put_inotify_watch(watch);
goto out;
}
err = 0;
inotify_init_watch(&hn->hn_watch);
wd = inotify_add_watch(au_hin_handle, &hn->hn_watch, h_inode,
AuHinMask);
if (unlikely(wd < 0)) {
err = wd;
put_inotify_watch(&hn->hn_watch);
}
out:
return err;
}
/* Initialize a parent watch entry. */
static struct audit_parent *audit_init_parent(struct nameidata *ndp)
{
struct audit_parent *parent;
s32 wd;
parent = kzalloc(sizeof(*parent), GFP_KERNEL);
if (unlikely(!parent))
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&parent->watches);
parent->flags = 0;
inotify_init_watch(&parent->wdata);
/* grab a ref so inotify watch hangs around until we take audit_filter_mutex */
get_inotify_watch(&parent->wdata);
wd = inotify_add_watch(audit_ih, &parent->wdata, ndp->dentry->d_inode,
AUDIT_IN_WATCH);
if (wd < 0) {
audit_free_parent(&parent->wdata);
return ERR_PTR(wd);
}
return parent;
}
