mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 12:52:30 +00:00
3bd9400307
'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has deprecated its use. Suggested-by: John Wiele <jwiele@redhat.com> Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Creating audit records for mapped devices.
|
|
*
|
|
* Copyright (C) 2021 Fraunhofer AISEC. All rights reserved.
|
|
*
|
|
* Authors: Michael Weiß <michael.weiss@aisec.fraunhofer.de>
|
|
*/
|
|
|
|
#include <linux/audit.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device-mapper.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
#include "dm-audit.h"
|
|
#include "dm-core.h"
|
|
|
|
static struct audit_buffer *dm_audit_log_start(int audit_type,
|
|
const char *dm_msg_prefix,
|
|
const char *op)
|
|
{
|
|
struct audit_buffer *ab;
|
|
|
|
if (audit_enabled == AUDIT_OFF)
|
|
return NULL;
|
|
|
|
ab = audit_log_start(audit_context(), GFP_KERNEL, audit_type);
|
|
if (unlikely(!ab))
|
|
return NULL;
|
|
|
|
audit_log_format(ab, "module=%s op=%s", dm_msg_prefix, op);
|
|
return ab;
|
|
}
|
|
|
|
void dm_audit_log_ti(int audit_type, const char *dm_msg_prefix, const char *op,
|
|
struct dm_target *ti, int result)
|
|
{
|
|
struct audit_buffer *ab = NULL;
|
|
struct mapped_device *md = dm_table_get_md(ti->table);
|
|
int dev_major = dm_disk(md)->major;
|
|
int dev_minor = dm_disk(md)->first_minor;
|
|
|
|
switch (audit_type) {
|
|
case AUDIT_DM_CTRL:
|
|
ab = dm_audit_log_start(audit_type, dm_msg_prefix, op);
|
|
if (unlikely(!ab))
|
|
return;
|
|
audit_log_task_info(ab);
|
|
audit_log_format(ab, " dev=%d:%d error_msg='%s'", dev_major,
|
|
dev_minor, !result ? ti->error : "success");
|
|
break;
|
|
case AUDIT_DM_EVENT:
|
|
ab = dm_audit_log_start(audit_type, dm_msg_prefix, op);
|
|
if (unlikely(!ab))
|
|
return;
|
|
audit_log_format(ab, " dev=%d:%d sector=?", dev_major,
|
|
dev_minor);
|
|
break;
|
|
default: /* unintended use */
|
|
return;
|
|
}
|
|
|
|
audit_log_format(ab, " res=%d", result);
|
|
audit_log_end(ab);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dm_audit_log_ti);
|
|
|
|
void dm_audit_log_bio(const char *dm_msg_prefix, const char *op,
|
|
struct bio *bio, sector_t sector, int result)
|
|
{
|
|
struct audit_buffer *ab;
|
|
int dev_major = MAJOR(bio->bi_bdev->bd_dev);
|
|
int dev_minor = MINOR(bio->bi_bdev->bd_dev);
|
|
|
|
ab = dm_audit_log_start(AUDIT_DM_EVENT, dm_msg_prefix, op);
|
|
if (unlikely(!ab))
|
|
return;
|
|
|
|
audit_log_format(ab, " dev=%d:%d sector=%llu res=%d",
|
|
dev_major, dev_minor, sector, result);
|
|
audit_log_end(ab);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dm_audit_log_bio);
|