SSL init.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * fs-verity module initialization and logging
 *
 * Copyright 2019 Google LLC
 */

#include "fsverity_private.h"

#include <linux/ratelimit.h>

#ifdef CONFIG_SYSCTL
static const struct ctl_table fsverity_sysctl_table[] = {
#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
 {
  .procname       = "require_signatures",
  .data           = &fsverity_require_signatures,
  .maxlen         = sizeof(int),
  .mode           = 0644,
  .proc_handler   = proc_dointvec_minmax,
  .extra1         = SYSCTL_ZERO,
  .extra2         = SYSCTL_ONE,
 },
#endif
};

static void __init fsverity_init_sysctl(void)
{
 register_sysctl_init("fs/verity", fsverity_sysctl_table);
}
#else /* CONFIG_SYSCTL */
static inline void fsverity_init_sysctl(void)
{
}
#endif /* !CONFIG_SYSCTL */

void fsverity_msg(const struct inode *inode, const char *level,
    const char *fmt, ...)
{
 static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
          DEFAULT_RATELIMIT_BURST);
 struct va_format vaf;
 va_list args;

 if (!__ratelimit(&rs))
  return;

 va_start(args, fmt);
 vaf.fmt = fmt;
 vaf.va = &args;
 if (inode)
  printk("%sfs-verity (%s, inode %lu): %pV\n",
         level, inode->i_sb->s_id, inode->i_ino, &vaf);
 else
  printk("%sfs-verity: %pV\n", level, &vaf);
 va_end(args);
}

static int __init fsverity_init(void)
{
 fsverity_check_hash_algs();
 fsverity_init_info_cache();
 fsverity_init_workqueue();
 fsverity_init_sysctl();
 fsverity_init_signature();
 fsverity_init_bpf();
 return 0;
}
late_initcall(fsverity_init)