c98b7016f446be963e9ee57d96660335906743ae
[releases.git] / init.c
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
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
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)