146 lines
6.3 KiB
Diff
146 lines
6.3 KiB
Diff
|
From: Paolo Bonzini <pbonzini@redhat.com>
|
||
|
Date: Thu, 1 Jun 2017 17:25:03 +0200
|
||
|
Subject: [PATCH] megasas: do not read SCSI req parameters more than once from
|
||
|
frame
|
||
|
|
||
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
||
|
(cherry picked from commit b356807fcdfc45583c437f761fc579ab2a8eab11)
|
||
|
---
|
||
|
hw/scsi/megasas.c | 60 ++++++++++++++++++++++++-------------------------------
|
||
|
1 file changed, 26 insertions(+), 34 deletions(-)
|
||
|
|
||
|
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
|
||
|
index 38e0a2f5ef..135662df31 100644
|
||
|
--- a/hw/scsi/megasas.c
|
||
|
+++ b/hw/scsi/megasas.c
|
||
|
@@ -1653,42 +1653,39 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
|
||
|
int frame_cmd)
|
||
|
{
|
||
|
uint8_t *cdb;
|
||
|
+ int target_id, lun_id, cdb_len;
|
||
|
bool is_write;
|
||
|
struct SCSIDevice *sdev = NULL;
|
||
|
bool is_logical = (frame_cmd == MFI_CMD_LD_SCSI_IO);
|
||
|
|
||
|
cdb = cmd->frame->pass.cdb;
|
||
|
+ target_id = cmd->frame->header.target_id;
|
||
|
+ lun_id = cmd->frame->header.lun_id;
|
||
|
+ cdb_len = cmd->frame->header.cdb_len;
|
||
|
|
||
|
if (is_logical) {
|
||
|
- if (cmd->frame->header.target_id >= MFI_MAX_LD ||
|
||
|
- cmd->frame->header.lun_id != 0) {
|
||
|
+ if (target_id >= MFI_MAX_LD || lun_id != 0) {
|
||
|
trace_megasas_scsi_target_not_present(
|
||
|
- mfi_frame_desc[frame_cmd], is_logical,
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
|
||
|
+ mfi_frame_desc[frame_cmd], is_logical, target_id, lun_id);
|
||
|
return MFI_STAT_DEVICE_NOT_FOUND;
|
||
|
}
|
||
|
}
|
||
|
- sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
|
||
|
- cmd->frame->header.lun_id);
|
||
|
+ sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
|
||
|
|
||
|
cmd->iov_size = le32_to_cpu(cmd->frame->header.data_len);
|
||
|
- trace_megasas_handle_scsi(mfi_frame_desc[cmd->frame->header.frame_cmd],
|
||
|
trace_megasas_handle_scsi(mfi_frame_desc[frame_cmd], is_logical,
|
||
|
- cmd->frame->header.target_id,
|
||
|
- cmd->frame->header.lun_id, sdev, cmd->iov_size);
|
||
|
+ target_id, lun_id, sdev, cmd->iov_size);
|
||
|
|
||
|
if (!sdev || (megasas_is_jbod(s) && is_logical)) {
|
||
|
trace_megasas_scsi_target_not_present(
|
||
|
- mfi_frame_desc[frame_cmd], is_logical,
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
|
||
|
+ mfi_frame_desc[frame_cmd], is_logical, target_id, lun_id);
|
||
|
return MFI_STAT_DEVICE_NOT_FOUND;
|
||
|
}
|
||
|
|
||
|
- if (cmd->frame->header.cdb_len > 16) {
|
||
|
+ if (cdb_len > 16) {
|
||
|
trace_megasas_scsi_invalid_cdb_len(
|
||
|
mfi_frame_desc[frame_cmd], is_logical,
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id,
|
||
|
- cmd->frame->header.cdb_len);
|
||
|
+ target_id, lun_id, cdb_len);
|
||
|
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
|
||
|
cmd->frame->header.scsi_status = CHECK_CONDITION;
|
||
|
s->event_count++;
|
||
|
@@ -1702,12 +1699,10 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
|
||
|
return MFI_STAT_SCSI_DONE_WITH_ERROR;
|
||
|
}
|
||
|
|
||
|
- cmd->req = scsi_req_new(sdev, cmd->index,
|
||
|
- cmd->frame->header.lun_id, cdb, cmd);
|
||
|
+ cmd->req = scsi_req_new(sdev, cmd->index, lun_id, cdb, cmd);
|
||
|
if (!cmd->req) {
|
||
|
trace_megasas_scsi_req_alloc_failed(
|
||
|
- mfi_frame_desc[frame_cmd],
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
|
||
|
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
|
||
|
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
|
||
|
cmd->frame->header.scsi_status = BUSY;
|
||
|
s->event_count++;
|
||
|
@@ -1736,35 +1731,33 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
|
||
|
uint8_t cdb[16];
|
||
|
int len;
|
||
|
struct SCSIDevice *sdev = NULL;
|
||
|
+ int target_id, lun_id, cdb_len;
|
||
|
|
||
|
lba_count = le32_to_cpu(cmd->frame->io.header.data_len);
|
||
|
lba_start_lo = le32_to_cpu(cmd->frame->io.lba_lo);
|
||
|
lba_start_hi = le32_to_cpu(cmd->frame->io.lba_hi);
|
||
|
lba_start = ((uint64_t)lba_start_hi << 32) | lba_start_lo;
|
||
|
|
||
|
- if (cmd->frame->header.target_id < MFI_MAX_LD &&
|
||
|
- cmd->frame->header.lun_id == 0) {
|
||
|
- sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
|
||
|
- cmd->frame->header.lun_id);
|
||
|
+ target_id = cmd->frame->header.target_id;
|
||
|
+ lun_id = cmd->frame->header.lun_id;
|
||
|
+ cdb_len = cmd->frame->header.cdb_len;
|
||
|
+
|
||
|
+ if (target_id < MFI_MAX_LD && lun_id == 0) {
|
||
|
+ sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
|
||
|
}
|
||
|
|
||
|
trace_megasas_handle_io(cmd->index,
|
||
|
- mfi_frame_desc[frame_cmd],
|
||
|
- cmd->frame->header.target_id,
|
||
|
- cmd->frame->header.lun_id,
|
||
|
+ mfi_frame_desc[frame_cmd], target_id, lun_id,
|
||
|
(unsigned long)lba_start, (unsigned long)lba_count);
|
||
|
if (!sdev) {
|
||
|
trace_megasas_io_target_not_present(cmd->index,
|
||
|
- mfi_frame_desc[frame_cmd],
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
|
||
|
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
|
||
|
return MFI_STAT_DEVICE_NOT_FOUND;
|
||
|
}
|
||
|
|
||
|
- if (cmd->frame->header.cdb_len > 16) {
|
||
|
+ if (cdb_len > 16) {
|
||
|
trace_megasas_scsi_invalid_cdb_len(
|
||
|
- mfi_frame_desc[frame_cmd], 1,
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id,
|
||
|
- cmd->frame->header.cdb_len);
|
||
|
+ mfi_frame_desc[frame_cmd], 1, target_id, lun_id, cdb_len);
|
||
|
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
|
||
|
cmd->frame->header.scsi_status = CHECK_CONDITION;
|
||
|
s->event_count++;
|
||
|
@@ -1781,11 +1774,10 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
|
||
|
|
||
|
megasas_encode_lba(cdb, lba_start, lba_count, is_write);
|
||
|
cmd->req = scsi_req_new(sdev, cmd->index,
|
||
|
- cmd->frame->header.lun_id, cdb, cmd);
|
||
|
+ lun_id, cdb, cmd);
|
||
|
if (!cmd->req) {
|
||
|
trace_megasas_scsi_req_alloc_failed(
|
||
|
- mfi_frame_desc[frame_cmd],
|
||
|
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
|
||
|
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
|
||
|
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
|
||
|
cmd->frame->header.scsi_status = BUSY;
|
||
|
s->event_count++;
|