projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 671e67b4 EB |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* | |
| 7bf765dd | 3 | * fs-verity module initialization and logging |
| 671e67b4 EB |
4 | * |
| 5 | * Copyright 2019 Google LLC | |
| 6 | */ | |
| 7 | ||
| 8 | #include "fsverity_private.h" | |
| 9 | ||
| 10 | #include <linux/ratelimit.h> | |
| 11 | ||
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12 | #ifdef CONFIG_SYSCTL |
| 13 | static struct ctl_table_header *fsverity_sysctl_header; | |
| 14 | ||
| 15 | static 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 | |
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27 | }; |
| 28 | ||
| 29 | static 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 */ | |
| 37 | static inline void fsverity_init_sysctl(void) | |
| 38 | { | |
| 39 | } | |
| 40 | #endif /* !CONFIG_SYSCTL */ | |
| 41 | ||
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42 | void 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 | ||
| 64 | static int __init fsverity_init(void) | |
| 65 | { | |
| 66 | fsverity_check_hash_algs(); | |
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67 | fsverity_init_info_cache(); |
| 68 | fsverity_init_workqueue(); | |
| 456ae5fe | 69 | fsverity_init_sysctl(); |
| e77000cc | 70 | fsverity_init_signature(); |
| 67814c00 | 71 | fsverity_init_bpf(); |
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72 | return 0; |
| 73 | } | |
| 74 | late_initcall(fsverity_init) |