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#ifdef CONFIG_SYSCTL
13static struct ctl_table_header *fsverity_sysctl_header;
14
15static struct ctl_table fsverity_sysctl_table[] = {
16#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
17	{
18		.procname       = "require_signatures",
19		.data           = &fsverity_require_signatures,
20		.maxlen         = sizeof(int),
21		.mode           = 0644,
22		.proc_handler   = proc_dointvec_minmax,
23		.extra1         = SYSCTL_ZERO,
24		.extra2         = SYSCTL_ONE,
25	},
26#endif
27};
28
29static void __init fsverity_init_sysctl(void)
30{
31	fsverity_sysctl_header = register_sysctl("fs/verity",
32						 fsverity_sysctl_table);
33	if (!fsverity_sysctl_header)
34		panic("fsverity sysctl registration failed");
35}
36#else /* CONFIG_SYSCTL */
37static inline void fsverity_init_sysctl(void)
38{
39}
40#endif /* !CONFIG_SYSCTL */
41
42void fsverity_msg(const struct inode *inode, const char *level,
43		  const char *fmt, ...)
44{
45	static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
46				      DEFAULT_RATELIMIT_BURST);
47	struct va_format vaf;
48	va_list args;
49
50	if (!__ratelimit(&rs))
51		return;
52
53	va_start(args, fmt);
54	vaf.fmt = fmt;
55	vaf.va = &args;
56	if (inode)
57		printk("%sfs-verity (%s, inode %lu): %pV\n",
58		       level, inode->i_sb->s_id, inode->i_ino, &vaf);
59	else
60		printk("%sfs-verity: %pV\n", level, &vaf);
61	va_end(args);
62}
63
64static int __init fsverity_init(void)
65{
66	fsverity_check_hash_algs();
67	fsverity_init_info_cache();
68	fsverity_init_workqueue();
69	fsverity_init_sysctl();
70	fsverity_init_signature();
71	fsverity_init_bpf();
72	return 0;
73}
74late_initcall(fsverity_init)

 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#ifdef CONFIG_SYSCTL
 
 
13static struct ctl_table fsverity_sysctl_table[] = {
14#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
15	{
16		.procname       = "require_signatures",
17		.data           = &fsverity_require_signatures,
18		.maxlen         = sizeof(int),
19		.mode           = 0644,
20		.proc_handler   = proc_dointvec_minmax,
21		.extra1         = SYSCTL_ZERO,
22		.extra2         = SYSCTL_ONE,
23	},
24#endif
25};
26
27static void __init fsverity_init_sysctl(void)
28{
29	register_sysctl_init("fs/verity", fsverity_sysctl_table);
 
 
 
30}
31#else /* CONFIG_SYSCTL */
32static inline void fsverity_init_sysctl(void)
33{
34}
35#endif /* !CONFIG_SYSCTL */
36
37void fsverity_msg(const struct inode *inode, const char *level,
38		  const char *fmt, ...)
39{
40	static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
41				      DEFAULT_RATELIMIT_BURST);
42	struct va_format vaf;
43	va_list args;
44
45	if (!__ratelimit(&rs))
46		return;
47
48	va_start(args, fmt);
49	vaf.fmt = fmt;
50	vaf.va = &args;
51	if (inode)
52		printk("%sfs-verity (%s, inode %lu): %pV\n",
53		       level, inode->i_sb->s_id, inode->i_ino, &vaf);
54	else
55		printk("%sfs-verity: %pV\n", level, &vaf);
56	va_end(args);
57}
58
59static int __init fsverity_init(void)
60{
61	fsverity_check_hash_algs();
62	fsverity_init_info_cache();
63	fsverity_init_workqueue();
64	fsverity_init_sysctl();
65	fsverity_init_signature();
66	fsverity_init_bpf();
67	return 0;
68}
69late_initcall(fsverity_init)