mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 10:01:43 +00:00
tpm: Move shared eventlog functions to common.c
Functions and structures specific to TPM1 are renamed from tpm* to tpm1*. Signed-off-by: Thiebaud Weksteen <tweek@google.com> Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Thiebaud Weksteen
Jarkko Sakkinen
parent
0bfb237460
commit
9b01b53566
@ -4,8 +4,8 @@
|
||||
#
|
||||
obj-$(CONFIG_TCG_TPM) += tpm.o
|
||||
tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o \
|
||||
tpm-dev-common.o tpmrm-dev.o eventlog/tpm1.o eventlog/tpm2.o \
|
||||
tpm2-space.o
|
||||
tpm-dev-common.o tpmrm-dev.o eventlog/common.o eventlog/tpm1.o \
|
||||
eventlog/tpm2.o tpm2-space.o
|
||||
tpm-$(CONFIG_ACPI) += tpm_ppi.o eventlog/acpi.o
|
||||
tpm-$(CONFIG_EFI) += eventlog/efi.o
|
||||
tpm-$(CONFIG_OF) += eventlog/of.o
|
||||
|
||||
195
drivers/char/tpm/eventlog/common.c
Normal file
195
drivers/char/tpm/eventlog/common.c
Normal file
@ -0,0 +1,195 @@
|
||||
/*
|
||||
* Copyright (C) 2005, 2012 IBM Corporation
|
||||
*
|
||||
* Authors:
|
||||
* Kent Yoder <key@linux.vnet.ibm.com>
|
||||
* Seiji Munetoh <munetoh@jp.ibm.com>
|
||||
* Stefan Berger <stefanb@us.ibm.com>
|
||||
* Reiner Sailer <sailer@watson.ibm.com>
|
||||
* Kylene Hall <kjhall@us.ibm.com>
|
||||
* Nayna Jain <nayna@linux.vnet.ibm.com>
|
||||
*
|
||||
* Access to the event log created by a system's firmware / BIOS
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/security.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/tpm_eventlog.h>
|
||||
|
||||
#include "../tpm.h"
|
||||
|
||||
|
||||
static int tpm_bios_measurements_open(struct inode *inode,
|
||||
struct file *file)
|
||||
{
|
||||
int err;
|
||||
struct seq_file *seq;
|
||||
struct tpm_chip_seqops *chip_seqops;
|
||||
const struct seq_operations *seqops;
|
||||
struct tpm_chip *chip;
|
||||
|
||||
inode_lock(inode);
|
||||
if (!inode->i_private) {
|
||||
inode_unlock(inode);
|
||||
return -ENODEV;
|
||||
}
|
||||
chip_seqops = (struct tpm_chip_seqops *)inode->i_private;
|
||||
seqops = chip_seqops->seqops;
|
||||
chip = chip_seqops->chip;
|
||||
get_device(&chip->dev);
|
||||
inode_unlock(inode);
|
||||
|
||||
/* now register seq file */
|
||||
err = seq_open(file, seqops);
|
||||
if (!err) {
|
||||
seq = file->private_data;
|
||||
seq->private = chip;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int tpm_bios_measurements_release(struct inode *inode,
|
||||
struct file *file)
|
||||
{
|
||||
struct seq_file *seq = (struct seq_file *)file->private_data;
|
||||
struct tpm_chip *chip = (struct tpm_chip *)seq->private;
|
||||
|
||||
put_device(&chip->dev);
|
||||
|
||||
return seq_release(inode, file);
|
||||
}
|
||||
|
||||
static const struct file_operations tpm_bios_measurements_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = tpm_bios_measurements_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = tpm_bios_measurements_release,
|
||||
};
|
||||
|
||||
static int tpm_read_log(struct tpm_chip *chip)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (chip->log.bios_event_log != NULL) {
|
||||
dev_dbg(&chip->dev,
|
||||
"%s: ERROR - event log already initialized\n",
|
||||
__func__);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
rc = tpm_read_log_acpi(chip);
|
||||
if (rc != -ENODEV)
|
||||
return rc;
|
||||
|
||||
rc = tpm_read_log_efi(chip);
|
||||
if (rc != -ENODEV)
|
||||
return rc;
|
||||
|
||||
return tpm_read_log_of(chip);
|
||||
}
|
||||
|
||||
/*
|
||||
* tpm_bios_log_setup() - Read the event log from the firmware
|
||||
* @chip: TPM chip to use.
|
||||
*
|
||||
* If an event log is found then the securityfs files are setup to
|
||||
* export it to userspace, otherwise nothing is done.
|
||||
*
|
||||
* Returns -ENODEV if the firmware has no event log or securityfs is not
|
||||
* supported.
|
||||
*/
|
||||
int tpm_bios_log_setup(struct tpm_chip *chip)
|
||||
{
|
||||
const char *name = dev_name(&chip->dev);
|
||||
unsigned int cnt;
|
||||
int log_version;
|
||||
int rc = 0;
|
||||
|
||||
rc = tpm_read_log(chip);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
log_version = rc;
|
||||
|
||||
cnt = 0;
|
||||
chip->bios_dir[cnt] = securityfs_create_dir(name, NULL);
|
||||
/* NOTE: securityfs_create_dir can return ENODEV if securityfs is
|
||||
* compiled out. The caller should ignore the ENODEV return code.
|
||||
*/
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
|
||||
chip->bin_log_seqops.chip = chip;
|
||||
if (log_version == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2)
|
||||
chip->bin_log_seqops.seqops =
|
||||
&tpm2_binary_b_measurements_seqops;
|
||||
else
|
||||
chip->bin_log_seqops.seqops =
|
||||
&tpm1_binary_b_measurements_seqops;
|
||||
|
||||
|
||||
chip->bios_dir[cnt] =
|
||||
securityfs_create_file("binary_bios_measurements",
|
||||
0440, chip->bios_dir[0],
|
||||
(void *)&chip->bin_log_seqops,
|
||||
&tpm_bios_measurements_ops);
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
|
||||
if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
|
||||
|
||||
chip->ascii_log_seqops.chip = chip;
|
||||
chip->ascii_log_seqops.seqops =
|
||||
&tpm1_ascii_b_measurements_seqops;
|
||||
|
||||
chip->bios_dir[cnt] =
|
||||
securityfs_create_file("ascii_bios_measurements",
|
||||
0440, chip->bios_dir[0],
|
||||
(void *)&chip->ascii_log_seqops,
|
||||
&tpm_bios_measurements_ops);
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
rc = PTR_ERR(chip->bios_dir[cnt]);
|
||||
chip->bios_dir[cnt] = NULL;
|
||||
tpm_bios_log_teardown(chip);
|
||||
return rc;
|
||||
}
|
||||
|
||||
void tpm_bios_log_teardown(struct tpm_chip *chip)
|
||||
{
|
||||
int i;
|
||||
struct inode *inode;
|
||||
|
||||
/* securityfs_remove currently doesn't take care of handling sync
|
||||
* between removal and opening of pseudo files. To handle this, a
|
||||
* workaround is added by making i_private = NULL here during removal
|
||||
* and to check it during open(), both within inode_lock()/unlock().
|
||||
* This design ensures that open() either safely gets kref or fails.
|
||||
*/
|
||||
for (i = (TPM_NUM_EVENT_LOG_FILES - 1); i >= 0; i--) {
|
||||
if (chip->bios_dir[i]) {
|
||||
inode = d_inode(chip->bios_dir[i]);
|
||||
inode_lock(inode);
|
||||
inode->i_private = NULL;
|
||||
inode_unlock(inode);
|
||||
securityfs_remove(chip->bios_dir[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -71,7 +71,7 @@ static const char* tcpa_pc_event_id_strings[] = {
|
||||
};
|
||||
|
||||
/* returns pointer to start of pos. entry of tcg log */
|
||||
static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
|
||||
static void *tpm1_bios_measurements_start(struct seq_file *m, loff_t *pos)
|
||||
{
|
||||
loff_t i;
|
||||
struct tpm_chip *chip = m->private;
|
||||
@ -118,7 +118,7 @@ static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
|
||||
return addr;
|
||||
}
|
||||
|
||||
static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
|
||||
static void *tpm1_bios_measurements_next(struct seq_file *m, void *v,
|
||||
loff_t *pos)
|
||||
{
|
||||
struct tcpa_event *event = v;
|
||||
@ -149,7 +149,7 @@ static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
|
||||
return v;
|
||||
}
|
||||
|
||||
static void tpm_bios_measurements_stop(struct seq_file *m, void *v)
|
||||
static void tpm1_bios_measurements_stop(struct seq_file *m, void *v)
|
||||
{
|
||||
}
|
||||
|
||||
@ -232,7 +232,7 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
|
||||
}
|
||||
|
||||
static int tpm_binary_bios_measurements_show(struct seq_file *m, void *v)
|
||||
static int tpm1_binary_bios_measurements_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct tcpa_event *event = v;
|
||||
struct tcpa_event temp_event;
|
||||
@ -261,18 +261,7 @@ static int tpm_binary_bios_measurements_show(struct seq_file *m, void *v)
|
||||
|
||||
}
|
||||
|
||||
static int tpm_bios_measurements_release(struct inode *inode,
|
||||
struct file *file)
|
||||
{
|
||||
struct seq_file *seq = (struct seq_file *)file->private_data;
|
||||
struct tpm_chip *chip = (struct tpm_chip *)seq->private;
|
||||
|
||||
put_device(&chip->dev);
|
||||
|
||||
return seq_release(inode, file);
|
||||
}
|
||||
|
||||
static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
|
||||
static int tpm1_ascii_bios_measurements_show(struct seq_file *m, void *v)
|
||||
{
|
||||
int len = 0;
|
||||
char *eventname;
|
||||
@ -305,172 +294,16 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct seq_operations tpm_ascii_b_measurements_seqops = {
|
||||
.start = tpm_bios_measurements_start,
|
||||
.next = tpm_bios_measurements_next,
|
||||
.stop = tpm_bios_measurements_stop,
|
||||
.show = tpm_ascii_bios_measurements_show,
|
||||
const struct seq_operations tpm1_ascii_b_measurements_seqops = {
|
||||
.start = tpm1_bios_measurements_start,
|
||||
.next = tpm1_bios_measurements_next,
|
||||
.stop = tpm1_bios_measurements_stop,
|
||||
.show = tpm1_ascii_bios_measurements_show,
|
||||
};
|
||||
|
||||
static const struct seq_operations tpm_binary_b_measurements_seqops = {
|
||||
.start = tpm_bios_measurements_start,
|
||||
.next = tpm_bios_measurements_next,
|
||||
.stop = tpm_bios_measurements_stop,
|
||||
.show = tpm_binary_bios_measurements_show,
|
||||
const struct seq_operations tpm1_binary_b_measurements_seqops = {
|
||||
.start = tpm1_bios_measurements_start,
|
||||
.next = tpm1_bios_measurements_next,
|
||||
.stop = tpm1_bios_measurements_stop,
|
||||
.show = tpm1_binary_bios_measurements_show,
|
||||
};
|
||||
|
||||
static int tpm_bios_measurements_open(struct inode *inode,
|
||||
struct file *file)
|
||||
{
|
||||
int err;
|
||||
struct seq_file *seq;
|
||||
struct tpm_chip_seqops *chip_seqops;
|
||||
const struct seq_operations *seqops;
|
||||
struct tpm_chip *chip;
|
||||
|
||||
inode_lock(inode);
|
||||
if (!inode->i_private) {
|
||||
inode_unlock(inode);
|
||||
return -ENODEV;
|
||||
}
|
||||
chip_seqops = (struct tpm_chip_seqops *)inode->i_private;
|
||||
seqops = chip_seqops->seqops;
|
||||
chip = chip_seqops->chip;
|
||||
get_device(&chip->dev);
|
||||
inode_unlock(inode);
|
||||
|
||||
/* now register seq file */
|
||||
err = seq_open(file, seqops);
|
||||
if (!err) {
|
||||
seq = file->private_data;
|
||||
seq->private = chip;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct file_operations tpm_bios_measurements_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = tpm_bios_measurements_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = tpm_bios_measurements_release,
|
||||
};
|
||||
|
||||
static int tpm_read_log(struct tpm_chip *chip)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (chip->log.bios_event_log != NULL) {
|
||||
dev_dbg(&chip->dev,
|
||||
"%s: ERROR - event log already initialized\n",
|
||||
__func__);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
rc = tpm_read_log_acpi(chip);
|
||||
if (rc != -ENODEV)
|
||||
return rc;
|
||||
|
||||
rc = tpm_read_log_efi(chip);
|
||||
if (rc != -ENODEV)
|
||||
return rc;
|
||||
|
||||
return tpm_read_log_of(chip);
|
||||
}
|
||||
|
||||
/*
|
||||
* tpm_bios_log_setup() - Read the event log from the firmware
|
||||
* @chip: TPM chip to use.
|
||||
*
|
||||
* If an event log is found then the securityfs files are setup to
|
||||
* export it to userspace, otherwise nothing is done.
|
||||
*
|
||||
* Returns -ENODEV if the firmware has no event log or securityfs is not
|
||||
* supported.
|
||||
*/
|
||||
int tpm_bios_log_setup(struct tpm_chip *chip)
|
||||
{
|
||||
const char *name = dev_name(&chip->dev);
|
||||
unsigned int cnt;
|
||||
int log_version;
|
||||
int rc = 0;
|
||||
|
||||
rc = tpm_read_log(chip);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
log_version = rc;
|
||||
|
||||
cnt = 0;
|
||||
chip->bios_dir[cnt] = securityfs_create_dir(name, NULL);
|
||||
/* NOTE: securityfs_create_dir can return ENODEV if securityfs is
|
||||
* compiled out. The caller should ignore the ENODEV return code.
|
||||
*/
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
|
||||
chip->bin_log_seqops.chip = chip;
|
||||
if (log_version == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2)
|
||||
chip->bin_log_seqops.seqops =
|
||||
&tpm2_binary_b_measurements_seqops;
|
||||
else
|
||||
chip->bin_log_seqops.seqops =
|
||||
&tpm_binary_b_measurements_seqops;
|
||||
|
||||
|
||||
chip->bios_dir[cnt] =
|
||||
securityfs_create_file("binary_bios_measurements",
|
||||
0440, chip->bios_dir[0],
|
||||
(void *)&chip->bin_log_seqops,
|
||||
&tpm_bios_measurements_ops);
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
|
||||
if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
|
||||
|
||||
chip->ascii_log_seqops.chip = chip;
|
||||
chip->ascii_log_seqops.seqops =
|
||||
&tpm_ascii_b_measurements_seqops;
|
||||
|
||||
chip->bios_dir[cnt] =
|
||||
securityfs_create_file("ascii_bios_measurements",
|
||||
0440, chip->bios_dir[0],
|
||||
(void *)&chip->ascii_log_seqops,
|
||||
&tpm_bios_measurements_ops);
|
||||
if (IS_ERR(chip->bios_dir[cnt]))
|
||||
goto err;
|
||||
cnt++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
rc = PTR_ERR(chip->bios_dir[cnt]);
|
||||
chip->bios_dir[cnt] = NULL;
|
||||
tpm_bios_log_teardown(chip);
|
||||
return rc;
|
||||
}
|
||||
|
||||
void tpm_bios_log_teardown(struct tpm_chip *chip)
|
||||
{
|
||||
int i;
|
||||
struct inode *inode;
|
||||
|
||||
/* securityfs_remove currently doesn't take care of handling sync
|
||||
* between removal and opening of pseudo files. To handle this, a
|
||||
* workaround is added by making i_private = NULL here during removal
|
||||
* and to check it during open(), both within inode_lock()/unlock().
|
||||
* This design ensures that open() either safely gets kref or fails.
|
||||
*/
|
||||
for (i = (TPM_NUM_EVENT_LOG_FILES - 1); i >= 0; i--) {
|
||||
if (chip->bios_dir[i]) {
|
||||
inode = d_inode(chip->bios_dir[i]);
|
||||
inode_lock(inode);
|
||||
inode->i_private = NULL;
|
||||
inode_unlock(inode);
|
||||
securityfs_remove(chip->bios_dir[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -590,6 +590,8 @@ int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc,
|
||||
int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,
|
||||
u32 cc, u8 *buf, size_t *bufsiz);
|
||||
|
||||
extern const struct seq_operations tpm1_ascii_b_measurements_seqops;
|
||||
extern const struct seq_operations tpm1_binary_b_measurements_seqops;
|
||||
extern const struct seq_operations tpm2_binary_b_measurements_seqops;
|
||||
|
||||
#if defined(CONFIG_ACPI)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user