From 244a3ef947ec21020459d6f6f81626d70aeae1c2 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini 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 (cherry picked from commit b356807fcdfc45583c437f761fc579ab2a8eab11) Signed-off-by: Michael Roth --- 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++; -- 2.39.2