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authorAl Viro <viro@zeniv.linux.org.uk>2010-01-30 22:51:25 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2010-03-03 14:07:57 -0500
commit1f707137b55764740981d022d29c622832a61880 (patch)
treeaf5f72ea7df1afbc1f3b5bb53a3ab3d8ebaae1e0 /kernel/audit_tree.c
parent462d60577a997aa87c935ae4521bd303733a9f2b (diff)
downloadlinux-sh-1f707137b55764740981d022d29c622832a61880.tar.gz
new helper: iterate_mounts()
apply function to vfsmounts in set returned by collect_mounts(), stop if it returns non-zero. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/audit_tree.c')
-rw-r--r--kernel/audit_tree.c49
1 files changed, 16 insertions, 33 deletions
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index f09b42d9c32d..028e85663f27 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -548,6 +548,11 @@ int audit_remove_tree_rule(struct audit_krule *rule)
return 0;
}
+static int compare_root(struct vfsmount *mnt, void *arg)
+{
+ return mnt->mnt_root->d_inode == arg;
+}
+
void audit_trim_trees(void)
{
struct list_head cursor;
@@ -559,7 +564,6 @@ void audit_trim_trees(void)
struct path path;
struct vfsmount *root_mnt;
struct node *node;
- struct list_head list;
int err;
tree = container_of(cursor.next, struct audit_tree, list);
@@ -577,24 +581,16 @@ void audit_trim_trees(void)
if (!root_mnt)
goto skip_it;
- list_add_tail(&list, &root_mnt->mnt_list);
spin_lock(&hash_lock);
list_for_each_entry(node, &tree->chunks, list) {
- struct audit_chunk *chunk = find_chunk(node);
- struct inode *inode = chunk->watch.inode;
- struct vfsmount *mnt;
+ struct inode *inode = find_chunk(node)->watch.inode;
node->index |= 1U<<31;
- list_for_each_entry(mnt, &list, mnt_list) {
- if (mnt->mnt_root->d_inode == inode) {
- node->index &= ~(1U<<31);
- break;
- }
- }
+ if (iterate_mounts(compare_root, inode, root_mnt))
+ node->index &= ~(1U<<31);
}
spin_unlock(&hash_lock);
trim_marked(tree);
put_tree(tree);
- list_del_init(&list);
drop_collected_mounts(root_mnt);
skip_it:
mutex_lock(&audit_filter_mutex);
@@ -622,13 +618,17 @@ void audit_put_tree(struct audit_tree *tree)
put_tree(tree);
}
+static int tag_mount(struct vfsmount *mnt, void *arg)
+{
+ return tag_chunk(mnt->mnt_root->d_inode, arg);
+}
+
/* called with audit_filter_mutex */
int audit_add_tree_rule(struct audit_krule *rule)
{
struct audit_tree *seed = rule->tree, *tree;
struct path path;
- struct vfsmount *mnt, *p;
- struct list_head list;
+ struct vfsmount *mnt;
int err;
list_for_each_entry(tree, &tree_list, list) {
@@ -654,16 +654,9 @@ int audit_add_tree_rule(struct audit_krule *rule)
err = -ENOMEM;
goto Err;
}
- list_add_tail(&list, &mnt->mnt_list);
get_tree(tree);
- list_for_each_entry(p, &list, mnt_list) {
- err = tag_chunk(p->mnt_root->d_inode, tree);
- if (err)
- break;
- }
-
- list_del(&list);
+ err = iterate_mounts(tag_mount, tree, mnt);
drop_collected_mounts(mnt);
if (!err) {
@@ -700,7 +693,6 @@ int audit_tag_tree(char *old, char *new)
int failed = 0;
struct path path1, path2;
struct vfsmount *tagged;
- struct list_head list;
int err;
err = kern_path(new, 0, &path2);
@@ -717,15 +709,12 @@ int audit_tag_tree(char *old, char *new)
return err;
}
- list_add_tail(&list, &tagged->mnt_list);
-
mutex_lock(&audit_filter_mutex);
list_add(&barrier, &tree_list);
list_add(&cursor, &barrier);
while (cursor.next != &tree_list) {
struct audit_tree *tree;
- struct vfsmount *p;
int good_one = 0;
tree = container_of(cursor.next, struct audit_tree, list);
@@ -746,12 +735,7 @@ int audit_tag_tree(char *old, char *new)
continue;
}
- list_for_each_entry(p, &list, mnt_list) {
- failed = tag_chunk(p->mnt_root->d_inode, tree);
- if (failed)
- break;
- }
-
+ failed = iterate_mounts(tag_mount, tree, tagged);
if (failed) {
put_tree(tree);
mutex_lock(&audit_filter_mutex);
@@ -792,7 +776,6 @@ int audit_tag_tree(char *old, char *new)
}
list_del(&barrier);
list_del(&cursor);
- list_del(&list);
mutex_unlock(&audit_filter_mutex);
path_put(&path1);
drop_collected_mounts(tagged);