1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * fs-verity module initialization and logging
4  *
5  * Copyright 2019 Google LLC
6  */
7 
8 #include "fsverity_private.h"
9 
10 #include <linux/ratelimit.h>
11 
fsverity_msg(const struct inode * inode,const char * level,const char * fmt,...)12 void fsverity_msg(const struct inode *inode, const char *level,
13 		  const char *fmt, ...)
14 {
15 	static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
16 				      DEFAULT_RATELIMIT_BURST);
17 	struct va_format vaf;
18 	va_list args;
19 
20 	if (!__ratelimit(&rs))
21 		return;
22 
23 	va_start(args, fmt);
24 	vaf.fmt = fmt;
25 	vaf.va = &args;
26 	if (inode)
27 		printk("%sfs-verity (%s, inode %lu): %pV\n",
28 		       level, inode->i_sb->s_id, inode->i_ino, &vaf);
29 	else
30 		printk("%sfs-verity: %pV\n", level, &vaf);
31 	va_end(args);
32 }
33 
fsverity_init(void)34 static int __init fsverity_init(void)
35 {
36 	int err;
37 
38 	fsverity_check_hash_algs();
39 
40 	err = fsverity_init_info_cache();
41 	if (err)
42 		return err;
43 
44 	err = fsverity_init_workqueue();
45 	if (err)
46 		goto err_exit_info_cache;
47 
48 	err = fsverity_init_signature();
49 	if (err)
50 		goto err_exit_workqueue;
51 
52 	pr_debug("Initialized fs-verity\n");
53 	return 0;
54 
55 err_exit_workqueue:
56 	fsverity_exit_workqueue();
57 err_exit_info_cache:
58 	fsverity_exit_info_cache();
59 	return err;
60 }
61 late_initcall(fsverity_init)
62