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scsi-disk: move scsi_handle_rw_error earlier

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Remove the forward declaration.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-02-24 13:14:07 +01:00
parent 6f1a5c37db
commit f95f61c2c9
1 changed files with 83 additions and 85 deletions
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168
hw/scsi/scsi-disk.c
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@ -111,8 +111,6 @@ struct SCSIDiskState {
uint16_t rotation_rate;
};
static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed);
static void scsi_free_request(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
@ -182,6 +180,89 @@ static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
}
/*
* scsi_handle_rw_error has two return values. False means that the error
* must be ignored, true means that the error has been processed and the
* caller should not do anything else for this request. Note that
* scsi_handle_rw_error always manages its reference counts, independent
* of the return value.
*/
static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
{
bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
is_read, error);
if (action == BLOCK_ERROR_ACTION_REPORT) {
if (acct_failed) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
}
switch (error) {
case 0:
/* A passthrough command has run and has produced sense data; check
* whether the error has to be handled by the guest or should rather
* pause the host.
*/
assert(r->status && *r->status);
if (scsi_sense_buf_is_guest_recoverable(r->req.sense, sizeof(r->req.sense))) {
/* These errors are handled by guest. */
sdc->update_sense(&r->req);
scsi_req_complete(&r->req, *r->status);
return true;
}
error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
break;
#ifdef CONFIG_LINUX
/* These errno mapping are specific to Linux. For more information:
* - scsi_decide_disposition in drivers/scsi/scsi_error.c
* - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
* - blk_errors[] in block/blk-core.c
*/
case EBADE:
/* DID_NEXUS_FAILURE -> BLK_STS_NEXUS. */
scsi_req_complete(&r->req, RESERVATION_CONFLICT);
break;
case ENODATA:
/* DID_MEDIUM_ERROR -> BLK_STS_MEDIUM. */
scsi_check_condition(r, SENSE_CODE(READ_ERROR));
break;
case EREMOTEIO:
/* DID_TARGET_FAILURE -> BLK_STS_TARGET. */
scsi_req_complete(&r->req, HARDWARE_ERROR);
break;
#endif
case ENOMEDIUM:
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
break;
case ENOMEM:
scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
break;
case EINVAL:
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
break;
case ENOSPC:
scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED));
break;
default:
scsi_check_condition(r, SENSE_CODE(IO_ERROR));
break;
}
}
blk_error_action(s->qdev.conf.blk, action, is_read, error);
if (action == BLOCK_ERROR_ACTION_IGNORE) {
scsi_req_complete(&r->req, 0);
return true;
}
if (action == BLOCK_ERROR_ACTION_STOP) {
scsi_req_retry(&r->req);
}
return true;
}
static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed)
{
if (r->req.io_canceled) {
@ -428,89 +509,6 @@ static void scsi_read_data(SCSIRequest *req)
}
}
/*
* scsi_handle_rw_error has two return values. False means that the error
* must be ignored, true means that the error has been processed and the
* caller should not do anything else for this request. Note that
* scsi_handle_rw_error always manages its reference counts, independent
* of the return value.
*/
static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
{
bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
is_read, error);
if (action == BLOCK_ERROR_ACTION_REPORT) {
if (acct_failed) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
}
switch (error) {
case 0:
/* A passthrough command has run and has produced sense data; check
* whether the error has to be handled by the guest or should rather
* pause the host.
*/
assert(r->status && *r->status);
if (scsi_sense_buf_is_guest_recoverable(r->req.sense, sizeof(r->req.sense))) {
/* These errors are handled by guest. */
sdc->update_sense(&r->req);
scsi_req_complete(&r->req, *r->status);
return true;
}
error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
break;
#ifdef CONFIG_LINUX
/* These errno mapping are specific to Linux. For more information:
* - scsi_decide_disposition in drivers/scsi/scsi_error.c
* - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
* - blk_errors[] in block/blk-core.c
*/
case EBADE:
/* DID_NEXUS_FAILURE -> BLK_STS_NEXUS. */
scsi_req_complete(&r->req, RESERVATION_CONFLICT);
break;
case ENODATA:
/* DID_MEDIUM_ERROR -> BLK_STS_MEDIUM. */
scsi_check_condition(r, SENSE_CODE(READ_ERROR));
break;
case EREMOTEIO:
/* DID_TARGET_FAILURE -> BLK_STS_TARGET. */
scsi_req_complete(&r->req, HARDWARE_ERROR);
break;
#endif
case ENOMEDIUM:
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
break;
case ENOMEM:
scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
break;
case EINVAL:
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
break;
case ENOSPC:
scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED));
break;
default:
scsi_check_condition(r, SENSE_CODE(IO_ERROR));
break;
}
}
blk_error_action(s->qdev.conf.blk, action, is_read, error);
if (action == BLOCK_ERROR_ACTION_IGNORE) {
scsi_req_complete(&r->req, 0);
return true;
}
if (action == BLOCK_ERROR_ACTION_STOP) {
scsi_req_retry(&r->req);
}
return true;
}
static void scsi_write_complete_noio(SCSIDiskReq *r, int ret)
{
uint32_t n;