unsigned long ino; /* associated inode number */
struct audit_parent *parent; /* associated parent */
struct list_head wlist; /* entry in parent->watches list */
- struct list_head rules; /* associated rules */
+ struct list_head rules; /* anchor for krule->rlist */
};
struct audit_parent {
- struct list_head ilist; /* entry in inotify registration list */
- struct list_head watches; /* associated watches */
+ struct list_head ilist; /* tmp list used to free parents */
+ struct list_head watches; /* anchor for audit_watch->wlist */
struct inotify_watch wdata; /* inotify watch data */
unsigned flags; /* status flags */
};
/* Inotify events we care about. */
#define AUDIT_IN_WATCH IN_MOVE|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF
-static void audit_free_parent(struct inotify_watch *i_watch)
+static void audit_free_parent(struct audit_parent *parent)
+{
+ WARN_ON(!list_empty(&parent->watches));
+ kfree(parent);
+}
+
+static void audit_destroy_watch(struct inotify_watch *i_watch)
{
struct audit_parent *parent;
parent = container_of(i_watch, struct audit_parent, wdata);
- WARN_ON(!list_empty(&parent->watches));
- kfree(parent);
+ audit_free_parent(parent);
}
void audit_get_watch(struct audit_watch *watch)
return watch->path;
}
-struct list_head *audit_watch_rules(struct audit_watch *watch)
+int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev)
{
- return &watch->rules;
-}
-
-unsigned long audit_watch_inode(struct audit_watch *watch)
-{
- return watch->ino;
-}
-
-dev_t audit_watch_dev(struct audit_watch *watch)
-{
- return watch->dev;
+ return (watch->ino != (unsigned long)-1) &&
+ (watch->ino == ino) &&
+ (watch->dev == dev);
}
/* Initialize a parent watch entry. */
wd = inotify_add_watch(audit_ih, &parent->wdata,
ndp->path.dentry->d_inode, AUDIT_IN_WATCH);
if (wd < 0) {
- audit_free_parent(&parent->wdata);
+ audit_free_parent(parent);
return ERR_PTR(wd);
}
struct audit_entry *oentry, *nentry;
mutex_lock(&audit_filter_mutex);
+ /* Run all of the watches on this parent looking for the one that
+ * matches the given dname */
list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
if (audit_compare_dname_path(dname, owatch->path, NULL))
continue;
/* If the update involves invalidating rules, do the inode-based
* filtering now, so we don't omit records. */
- if (invalidating && current->audit_context)
+ if (invalidating && !audit_dummy_context())
audit_filter_inodes(current, current->audit_context);
+ /* updating ino will likely change which audit_hash_list we
+ * are on so we need a new watch for the new list */
nwatch = audit_dupe_watch(owatch);
if (IS_ERR(nwatch)) {
mutex_unlock(&audit_filter_mutex);
list_del(&oentry->rule.rlist);
list_del_rcu(&oentry->list);
- nentry = audit_dupe_rule(&oentry->rule, nwatch);
+ nentry = audit_dupe_rule(&oentry->rule);
if (IS_ERR(nentry)) {
list_del(&oentry->rule.list);
audit_panic("error updating watch, removing");
} else {
int h = audit_hash_ino((u32)ino);
+
+ /*
+ * nentry->rule.watch == oentry->rule.watch so
+ * we must drop that reference and set it to our
+ * new watch.
+ */
+ audit_put_watch(nentry->rule.watch);
+ audit_get_watch(nwatch);
+ nentry->rule.watch = nwatch;
list_add(&nentry->rule.rlist, &nwatch->rules);
list_add_rcu(&nentry->list, &audit_inode_hash[h]);
list_replace(&oentry->rule.list,
/* Unregister inotify watches for parents on in_list.
* Generates an IN_IGNORED event. */
-void audit_inotify_unregister(struct list_head *in_list)
+void audit_watch_inotify_unregister(struct list_head *in_list)
{
struct audit_parent *p, *n;
list_for_each_entry_safe(p, n, in_list, ilist) {
list_del(&p->ilist);
inotify_rm_watch(audit_ih, &p->wdata);
- /* the unpin matching the pin in audit_do_del_rule() */
+ /* the unpin matching the pin in audit_remove_watch_rule() */
unpin_inotify_watch(&p->wdata);
}
}
/* Find a matching watch entry, or add this one.
* Caller must hold audit_filter_mutex. */
-int audit_add_watch(struct audit_krule *krule)
+int audit_add_watch(struct audit_krule *krule, struct list_head **list)
{
struct audit_watch *watch = krule->watch;
struct inotify_watch *i_watch;
struct audit_parent *parent;
struct nameidata *ndp = NULL, *ndw = NULL;
- int ret = 0;
+ int h, ret = 0;
mutex_unlock(&audit_filter_mutex);
/* match get in audit_init_parent or inotify_find_watch */
put_inotify_watch(&parent->wdata);
+ h = audit_hash_ino((u32)watch->ino);
+ *list = &audit_inode_hash[h];
error:
audit_put_nd(ndp, ndw); /* NULL args OK */
return ret;
parent = container_of(i_watch, struct audit_parent, wdata);
if (mask & (IN_CREATE|IN_MOVED_TO) && inode)
- audit_update_watch(parent, dname, inode->i_sb->s_dev,
- inode->i_ino, 0);
+ audit_update_watch(parent, dname, inode->i_sb->s_dev, inode->i_ino, 0);
else if (mask & (IN_DELETE|IN_MOVED_FROM))
audit_update_watch(parent, dname, (dev_t)-1, (unsigned long)-1, 1);
/* inotify automatically removes the watch and sends IN_IGNORED */
static const struct inotify_operations audit_inotify_ops = {
.handle_event = audit_handle_ievent,
- .destroy_watch = audit_free_parent,
+ .destroy_watch = audit_destroy_watch,
};
static int __init audit_watch_init(void)
projects / linux-2.6-block.git / blobdiff