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tpm: report backend request error

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Use an Error** for request to let the caller handle error reporting.

This will also allow to inform the frontend of a backend error.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Marc-André Lureau 2018-01-29 19:33:06 +01:00 committed by Stefan Berger
parent c4fb8561bc
commit 6a8a23549a
6 changed files with 33 additions and 36 deletions
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9
backends/tpm.c
View file

@ -27,7 +27,7 @@ static void tpm_backend_request_completed(void *opaque, int ret)
TPMBackend *s = TPM_BACKEND(opaque);
TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
tic->request_completed(s->tpmif);
tic->request_completed(s->tpmif, ret);
/* no need for atomic, as long the BQL is taken */
s->cmd = NULL;
@ -38,8 +38,13 @@ static int tpm_backend_worker_thread(gpointer data)
{
TPMBackend *s = TPM_BACKEND(data);
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
Error *err = NULL;
k->handle_request(s, s->cmd);
k->handle_request(s, s->cmd, &err);
if (err) {
error_report_err(err);
return -1;
}
return 0;
}

21
hw/tpm/tpm_emulator.c
View file

@ -183,28 +183,19 @@ static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number,
return 0;
}
static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd)
static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd,
Error **errp)
{
TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
Error *err = NULL;
DPRINTF("processing TPM command");
if (tpm_emulator_set_locality(tpm_emu, cmd->locty, &err) < 0) {
goto error;
}
if (tpm_emulator_unix_tx_bufs(tpm_emu, cmd->in, cmd->in_len,
if (tpm_emulator_set_locality(tpm_emu, cmd->locty, errp) < 0 ||
tpm_emulator_unix_tx_bufs(tpm_emu, cmd->in, cmd->in_len,
cmd->out, cmd->out_len,
&cmd->selftest_done, &err) < 0) {
goto error;
&cmd->selftest_done, errp) < 0) {
tpm_util_write_fatal_error_response(cmd->out, cmd->out_len);
}
return;
error:
tpm_util_write_fatal_error_response(cmd->out, cmd->out_len);
error_report_err(err);
}
static int tpm_emulator_probe_caps(TPMEmulator *tpm_emu)

31
hw/tpm/tpm_passthrough.c
View file

@ -80,10 +80,11 @@ static int tpm_passthrough_unix_read(int fd, uint8_t *buf, uint32_t len)
}
return ret;
}
static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
const uint8_t *in, uint32_t in_len,
uint8_t *out, uint32_t out_len,
bool *selftest_done)
static void tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
const uint8_t *in, uint32_t in_len,
uint8_t *out, uint32_t out_len,
bool *selftest_done, Error **errp)
{
ssize_t ret;
bool is_selftest;
@ -98,9 +99,8 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
ret = qemu_write_full(tpm_pt->tpm_fd, in, in_len);
if (ret != in_len) {
if (!tpm_pt->tpm_op_canceled || errno != ECANCELED) {
error_report("tpm_passthrough: error while transmitting data "
"to TPM: %s (%i)",
strerror(errno), errno);
error_setg_errno(errp, errno, "tpm_passthrough: error while "
"transmitting data to TPM");
}
goto err_exit;
}
@ -110,15 +110,14 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
ret = tpm_passthrough_unix_read(tpm_pt->tpm_fd, out, out_len);
if (ret < 0) {
if (!tpm_pt->tpm_op_canceled || errno != ECANCELED) {
error_report("tpm_passthrough: error while reading data from "
"TPM: %s (%i)",
strerror(errno), errno);
error_setg_errno(errp, errno, "tpm_passthrough: error while "
"reading data from TPM");
}
} else if (ret < sizeof(struct tpm_resp_hdr) ||
tpm_cmd_get_size(out) != ret) {
ret = -1;
error_report("tpm_passthrough: received invalid response "
"packet from TPM");
error_setg_errno(errp, errno, "tpm_passthrough: received invalid "
"response packet from TPM");
}
if (is_selftest && (ret >= sizeof(struct tpm_resp_hdr))) {
@ -131,18 +130,18 @@ err_exit:
}
tpm_pt->tpm_executing = false;
return ret;
}
static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd *cmd)
static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd *cmd,
Error **errp)
{
TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb);
DPRINTF("tpm_passthrough: processing command %p\n", cmd);
tpm_passthrough_unix_tx_bufs(tpm_pt, cmd->in, cmd->in_len,
cmd->out, cmd->out_len, &cmd->selftest_done);
cmd->out, cmd->out_len, &cmd->selftest_done,
errp);
}
static void tpm_passthrough_reset(TPMBackend *tb)

3
hw/tpm/tpm_tis.c
View file

@ -393,7 +393,7 @@ static void tpm_tis_prep_abort(TPMState *s, uint8_t locty, uint8_t newlocty)
/*
* Callback from the TPM to indicate that the response was received.
*/
static void tpm_tis_request_completed(TPMIf *ti)
static void tpm_tis_request_completed(TPMIf *ti, int ret)
{
TPMState *s = TPM(ti);
uint8_t locty = s->cmd.locty;
@ -405,6 +405,7 @@ static void tpm_tis_request_completed(TPMIf *ti)
}
}
/* FIXME: report error if ret != 0 */
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE);
s->loc[locty].state = TPM_TIS_STATE_COMPLETION;

2
include/sysemu/tpm.h
View file

@ -41,7 +41,7 @@ typedef struct TPMIfClass {
InterfaceClass parent_class;
enum TpmModel model;
void (*request_completed)(TPMIf *obj);
void (*request_completed)(TPMIf *obj, int ret);
enum TPMVersion (*get_version)(TPMIf *obj);
} TPMIfClass;

3
include/sysemu/tpm_backend.h
View file

@ -18,6 +18,7 @@
#include "qapi-types.h"
#include "qemu/option.h"
#include "sysemu/tpm.h"
#include "qapi/error.h"
#define TYPE_TPM_BACKEND "tpm-backend"
#define TPM_BACKEND(obj) \
@ -84,7 +85,7 @@ struct TPMBackendClass {
TpmTypeOptions *(*get_tpm_options)(TPMBackend *t);
void (*handle_request)(TPMBackend *s, TPMBackendCmd *cmd);
void (*handle_request)(TPMBackend *s, TPMBackendCmd *cmd, Error **errp);
};
/**