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pscsi: finish cmd processing from pscsi_req_done 

This patch performs the pscsi_transport_complete operations from
pscsi_req_done. It looks like the only difference the transport_complete
callout provides is that it is called under t_state_lock which seems to
only be needed for the SCF_TRANSPORT_TASK_SENSE bit handling. We can
now use transport_copy_sense_to_cmd to handle the se_cmd sense bits, and
we can then drop the code where we have to copy the request info to
the pscsi_plugin_task for transport_complete use.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
hifive-unleashed-5.1
Mike Christie 2017-05-31 15:52:41 -05:00 committed by Nicholas Bellinger
parent 406f74c20d
commit dce6ce8cfb
2 changed files with 16 additions and 26 deletions
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38
drivers/target/target_core_pscsi.c
View File

@ -599,12 +599,11 @@ static void pscsi_destroy_device(struct se_device *dev)
}
}
static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
unsigned char *sense_buffer)
static void pscsi_complete_cmd(struct se_cmd *cmd, u8 scsi_status,
unsigned char *req_sense)
{
struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
struct scsi_device *sd = pdv->pdv_sd;
int result;
struct pscsi_plugin_task *pt = cmd->priv;
unsigned char *cdb;
/*
@ -615,7 +614,6 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
return;
cdb = &pt->pscsi_cdb[0];
result = pt->pscsi_result;
/*
* Hack to make sure that Write-Protect modepage is set if R/O mode is
* forced.
@ -624,7 +622,7 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
goto after_mode_sense;
if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
(status_byte(result) << 1) == SAM_STAT_GOOD) {
scsi_status == SAM_STAT_GOOD) {
bool read_only = target_lun_is_rdonly(cmd);
if (read_only) {
@ -659,12 +657,12 @@ after_mode_sense:
* storage engine.
*/
if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
(status_byte(result) << 1) == SAM_STAT_GOOD) {
scsi_status == SAM_STAT_GOOD) {
unsigned char *buf;
u16 bdl;
u32 blocksize;
buf = sg_virt(&sg[0]);
buf = sg_virt(&cmd->t_data_sg[0]);
if (!buf) {
pr_err("Unable to get buf for scatterlist\n");
goto after_mode_select;
@ -687,10 +685,8 @@ after_mode_sense:
}
after_mode_select:
if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) {
memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER);
cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
}
if (scsi_status == SAM_STAT_CHECK_CONDITION)
transport_copy_sense_to_cmd(cmd, req_sense);
}
enum {
@ -1049,30 +1045,29 @@ static void pscsi_req_done(struct request *req, int uptodate)
{
struct se_cmd *cmd = req->end_io_data;
struct pscsi_plugin_task *pt = cmd->priv;
int result = scsi_req(req)->result;
u8 scsi_status = status_byte(result) << 1;
pt->pscsi_result = scsi_req(req)->result;
pt->pscsi_resid = scsi_req(req)->resid_len;
cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
if (cmd->scsi_status) {
if (scsi_status) {
pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
" 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
pt->pscsi_result);
result);
}
switch (host_byte(pt->pscsi_result)) {
pscsi_complete_cmd(cmd, scsi_status, scsi_req(req)->sense);
switch (host_byte(result)) {
case DID_OK:
target_complete_cmd(cmd, cmd->scsi_status);
target_complete_cmd(cmd, scsi_status);
break;
default:
pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
" 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
pt->pscsi_result);
result);
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
break;
}
memcpy(pt->pscsi_sense, scsi_req(req)->sense, TRANSPORT_SENSE_BUFFER);
__blk_put_request(req->q, req);
kfree(pt);
}
@ -1090,7 +1085,6 @@ static const struct target_backend_ops pscsi_ops = {
.configure_device = pscsi_configure_device,
.destroy_device = pscsi_destroy_device,
.free_device = pscsi_free_device,
.transport_complete = pscsi_transport_complete,
.parse_cdb = pscsi_parse_cdb,
.set_configfs_dev_params = pscsi_set_configfs_dev_params,
.show_configfs_dev_params = pscsi_show_configfs_dev_params,

4
drivers/target/target_core_pscsi.h
View File

@ -23,10 +23,6 @@ struct scsi_device;
struct Scsi_Host;
struct pscsi_plugin_task {
unsigned char pscsi_sense[TRANSPORT_SENSE_BUFFER];
int pscsi_direction;
int pscsi_result;
u32 pscsi_resid;
unsigned char pscsi_cdb[0];
} ____cacheline_aligned;