kprobes: Show blacklist entries via debugfs (63724740) · Commits · 戴 / test

kernel/kprobes.c

+53 −8

Original line number	Diff line number	Diff line
		@@ -2249,6 +2249,46 @@ static const struct file_operations debugfs_kprobes_operations = {
		.release = seq_release,
		};

		/* kprobes/blacklist -- shows which functions can not be probed */
		static void kprobe_blacklist_seq_start(struct seq_file m, loff_t *pos)
		{
		return seq_list_start(&kprobe_blacklist, *pos);
		}

		static void kprobe_blacklist_seq_next(struct seq_file m, void v, loff_t pos)
		{
		return seq_list_next(v, &kprobe_blacklist, pos);
		}

		static int kprobe_blacklist_seq_show(struct seq_file m, void v)
		{
		struct kprobe_blacklist_entry *ent =
		list_entry(v, struct kprobe_blacklist_entry, list);

		seq_printf(m, "0x%p-0x%p\t%ps\n", (void *)ent->start_addr,
		(void )ent->end_addr, (void )ent->start_addr);
		return 0;
		}

		static const struct seq_operations kprobe_blacklist_seq_ops = {
		.start = kprobe_blacklist_seq_start,
		.next = kprobe_blacklist_seq_next,
		.stop = kprobe_seq_stop, /* Reuse void function */
		.show = kprobe_blacklist_seq_show,
		};

		static int kprobe_blacklist_open(struct inode inode, struct file filp)
		{
		return seq_open(filp, &kprobe_blacklist_seq_ops);
		}

		static const struct file_operations debugfs_kprobe_blacklist_ops = {
		.open = kprobe_blacklist_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = seq_release,
		};

		static void arm_all_kprobes(void)
		{
		struct hlist_head *head;
		@@ -2372,19 +2412,24 @@ static int __init debugfs_kprobe_init(void)

		file = debugfs_create_file("list", 0444, dir, NULL,
		&debugfs_kprobes_operations);
		if (!file) {
		debugfs_remove(dir);
		return -ENOMEM;
		}
		if (!file)
		goto error;

		file = debugfs_create_file("enabled", 0600, dir,
		&value, &fops_kp);
		if (!file) {
		debugfs_remove(dir);
		return -ENOMEM;
		}
		if (!file)
		goto error;

		file = debugfs_create_file("blacklist", 0444, dir, NULL,
		&debugfs_kprobe_blacklist_ops);
		if (!file)
		goto error;

		return 0;

		error:
		debugfs_remove(dir);
		return -ENOMEM;
		}

		late_initcall(debugfs_kprobe_init);

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