static void pvscsi_process_msg(const struct pvscsi_adapter *adapter,
const struct PVSCSIRingMsgDesc *e)
{
struct PVSCSIRingsState *s = adapter->rings_state;
struct Scsi_Host *host = adapter->host;
struct scsi_device *sdev;
printk(KERN_INFO "vmw_pvscsi: msg type: 0x%x - MSG RING: %u/%u (%u) \n",
e->type, s->msgProdIdx, s->msgConsIdx, s->msgNumEntriesLog2);
BUILD_BUG_ON(PVSCSI_MSG_LAST != 2);
if (e->type == PVSCSI_MSG_DEV_ADDED) {
struct PVSCSIMsgDescDevStatusChanged *desc;
desc = (struct PVSCSIMsgDescDevStatusChanged *)e;
printk(KERN_INFO
"vmw_pvscsi: msg: device added at scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
if (!scsi_host_get(host))
return;
sdev = scsi_device_lookup(host, desc->bus, desc->target,
desc->lun[1]);
if (sdev) {
printk(KERN_INFO "vmw_pvscsi: device already exists\n");
scsi_device_put(sdev);
} else
scsi_add_device(adapter->host, desc->bus,
desc->target, desc->lun[1]);
scsi_host_put(host);
} else if (e->type == PVSCSI_MSG_DEV_REMOVED) {
struct PVSCSIMsgDescDevStatusChanged *desc;
desc = (struct PVSCSIMsgDescDevStatusChanged *)e;
printk(KERN_INFO
"vmw_pvscsi: msg: device removed at scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
if (!scsi_host_get(host))
return;
sdev = scsi_device_lookup(host, desc->bus, desc->target,
desc->lun[1]);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
} else
printk(KERN_INFO
"vmw_pvscsi: failed to lookup scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
scsi_host_put(host);
}
}
static void tcm_loop_port_unlink(
struct se_portal_group *se_tpg,
struct se_lun *se_lun)
{
struct scsi_device *sd;
struct tcm_loop_hba *tl_hba;
struct tcm_loop_tpg *tl_tpg;
tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg);
tl_hba = tl_tpg->tl_hba;
sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt,
se_lun->unpacked_lun);
if (!sd) {
pr_err("Unable to locate struct scsi_device for %d:%d:"
"%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun);
return;
}
/*
* Remove Linux/SCSI struct scsi_device by HCTL
*/
scsi_remove_device(sd);
scsi_device_put(sd);
atomic_dec(&tl_tpg->tl_tpg_port_count);
smp_mb__after_atomic_dec();
pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n");
}
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct scsi_device *sdev = act->sdev;
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_LUN:
if (!(act->status & ZFCP_STATUS_ERP_NO_REF))
scsi_device_put(sdev);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (result == ZFCP_ERP_SUCCEEDED)
zfcp_scsi_schedule_rport_register(port);
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
put_device(&port->dev);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result == ZFCP_ERP_SUCCEEDED) {
register_service_level(&adapter->service_level);
queue_work(adapter->work_queue, &adapter->scan_work);
queue_work(adapter->work_queue, &adapter->ns_up_work);
} else
unregister_service_level(&adapter->service_level);
kref_put(&adapter->ref, zfcp_adapter_release);
break;
}
}
static void scsi_disk_put(struct scsi_disk *sdkp)
{
down(&sd_ref_sem);
kref_put(&sdkp->kref, scsi_disk_release);
scsi_device_put(sdkp->device);
up(&sd_ref_sem);
}
static void channel_rescan(void *data)
{
struct rescan_wrapper* rescan = (struct rescan_wrapper*)data;
struct Scsi_Host *host;
struct scsi_device *sdev = NULL;
MV_U16 target;
if (rescan->pAdapter->host[rescan->channelIndex] == NULL)
{
kfree(rescan);
return;
}
host = rescan->pAdapter->host[rescan->channelIndex]->scsihost;
down(&rescan->pAdapter->rescan_mutex);
if (atomic_read(&rescan->pAdapter->stopped) > 0)
{
up(&rescan->pAdapter->rescan_mutex);
kfree(rescan);
return;
}
mvLogMsg(MV_IAL_LOG_ID, MV_DEBUG, "[%d %d] channel_rescan(): "
"targets to add 0x%X, targets to remove 0x%X\n",
rescan->pAdapter->mvSataAdapter.adapterId,
rescan->channelIndex,
rescan->targetsToRemove,
rescan->targetsToAdd);
for (target = 0; (rescan->targetsToRemove != 0) && (target < host->max_id); target++)
{
if (rescan->targetsToRemove & (1 << target))
{
sdev = scsi_device_lookup(host, 0, target, 0);
if (sdev != NULL)
{
scsi_device_cancel(sdev, 0);
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
}
}
sdev = NULL;
for (target = 0; (rescan->targetsToAdd != 0) && (target < host->max_id); target++)
{
if (rescan->targetsToAdd & (1 << target))
{
sdev = scsi_add_device(host, 0, target, 0);
if (NULL == sdev)
{
mvLogMsg(MV_IAL_LOG_ID,
MV_DEBUG_ERROR,
"[%d %d %d] Error adding scsi device\n",
rescan->pAdapter->mvSataAdapter.adapterId,
rescan->channelIndex,
target);
}
}
}
up(&rescan->pAdapter->rescan_mutex);
kfree(rescan);
}
static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_port *port = dev_get_drvdata(dev);
struct zfcp_unit *unit;
u64 fcp_lun;
LIST_HEAD(unit_remove_lh);
struct scsi_device *sdev;
mutex_lock(&zfcp_data.config_mutex);
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
mutex_unlock(&zfcp_data.config_mutex);
return -EBUSY;
}
if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
mutex_unlock(&zfcp_data.config_mutex);
return -EINVAL;
}
read_lock_irq(&zfcp_data.config_lock);
unit = zfcp_get_unit_by_lun(port, fcp_lun);
read_unlock_irq(&zfcp_data.config_lock);
if (!unit) {
mutex_unlock(&zfcp_data.config_mutex);
return -ENXIO;
}
zfcp_unit_get(unit);
mutex_unlock(&zfcp_data.config_mutex);
sdev = scsi_device_lookup(port->adapter->scsi_host, 0,
port->starget_id,
scsilun_to_int((struct scsi_lun *)&fcp_lun));
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
mutex_lock(&zfcp_data.config_mutex);
zfcp_unit_put(unit);
if (atomic_read(&unit->refcount)) {
mutex_unlock(&zfcp_data.config_mutex);
return -ENXIO;
}
write_lock_irq(&zfcp_data.config_lock);
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
list_move(&unit->list, &unit_remove_lh);
write_unlock_irq(&zfcp_data.config_lock);
mutex_unlock(&zfcp_data.config_mutex);
zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
zfcp_erp_wait(unit->port->adapter);
zfcp_unit_dequeue(unit);
return (ssize_t)count;
}
static void scsi_disk_put(struct scsi_disk *sdkp)
{
struct scsi_device *sdev = sdkp->device;
mutex_lock(&sd_ref_mutex);
class_device_put(&sdkp->cdev);
scsi_device_put(sdev);
mutex_unlock(&sd_ref_mutex);
}
static void hba_proc_msg(struct mv_hba_msg *pmsg)
{
PHBA_Extension phba;
struct scsi_device *psdev;
/* we don't do things without pmsg->data */
if (NULL == pmsg->data)
return;
phba = (PHBA_Extension) pmsg->data;
MV_DBG(DMSG_HBA, "__MV__ In hba_proc_msg.\n");
MV_ASSERT(pmsg);
switch (pmsg->msg) {
case EVENT_DEVICE_ARRIVAL:
if (scsi_add_device(phba->host, 0, pmsg->param, 0))
MV_DBG(DMSG_SCSI,
"__MV__ add scsi disk %d-%d-%d failed.\n",
0, pmsg->param, 0);
else
MV_DBG(DMSG_SCSI,
"__MV__ add scsi disk %d-%d-%d.\n",
0, pmsg->param, 0);
break;
case EVENT_DEVICE_REMOVAL:
psdev = scsi_device_lookup(phba->host, 0, pmsg->param, 0);
if (NULL != psdev) {
MV_DBG(DMSG_SCSI,
"__MV__ remove scsi disk %d-%d-%d.\n",
0, pmsg->param, 0);
scsi_remove_device(psdev);
scsi_device_put(psdev);
} else {
MV_DBG(DMSG_SCSI,
"__MV__ no disk to remove %d-%d-%d\n",
0, pmsg->param, 0);
}
break;
case EVENT_HOT_PLUG:
sata_hotplug(pmsg->data, pmsg->param);
break;
default:
break;
}
}
static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
struct scsi_device *sdev;
unsigned int status, failed = 1;
sdev = zfcp_unit_sdev(unit);
if (sdev) {
status = atomic_read(&sdev_to_zfcp(sdev)->status);
failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
scsi_device_put(sdev);
}
return sprintf(buf, "%d\n", failed);
}
/**
* scsi_remove_single_device - Respond to user request to remove a device
* @host: user-supplied decimal integer
* @channel: user-supplied decimal integer
* @id: user-supplied decimal integer
* @lun: user-supplied decimal integer
*
* Description: called by writing "scsi remove-single-device" to
* /proc/scsi/scsi. Does a scsi_device_lookup() and scsi_remove_device()
*/
static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun)
{
struct scsi_device *sdev;
struct Scsi_Host *shost;
int error = -ENXIO;
shost = scsi_host_lookup(host);
if (IS_ERR(shost))
return PTR_ERR(shost);
sdev = scsi_device_lookup(shost, channel, id, lun);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
error = 0;
}
scsi_host_put(shost);
return error;
}
static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
struct zfcp_unit *unit;
u64 fcp_lun;
int retval = -EINVAL;
struct scsi_device *sdev;
if (!(port && get_device(&port->dev)))
return -EBUSY;
if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
goto out;
unit = zfcp_get_unit_by_lun(port, fcp_lun);
if (!unit)
goto out;
else
retval = 0;
sdev = scsi_device_lookup(port->adapter->scsi_host, 0,
port->starget_id,
scsilun_to_int((struct scsi_lun *)&fcp_lun));
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
write_lock_irq(&port->unit_list_lock);
list_del(&unit->list);
write_unlock_irq(&port->unit_list_lock);
put_device(&unit->dev);
zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
zfcp_device_unregister(&unit->dev, &zfcp_sysfs_unit_attrs);
out:
put_device(&port->dev);
return retval ? retval : (ssize_t) count;
}
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct scsi_device *sdev = act->sdev;
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_LUN:
if (!(act->status & ZFCP_STATUS_ERP_NO_REF))
scsi_device_put(sdev);
zfcp_erp_try_rport_unblock(port);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
/* This switch case might also happen after a forced reopen
* was successfully done and thus overwritten with a new
* non-forced reopen at `ersfs_2'. In this case, we must not
* do the clean-up of the non-forced version.
*/
if (act->step != ZFCP_ERP_STEP_UNINITIALIZED)
if (result == ZFCP_ERP_SUCCEEDED)
zfcp_erp_try_rport_unblock(port);
/* fall through */
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
put_device(&port->dev);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result == ZFCP_ERP_SUCCEEDED) {
register_service_level(&adapter->service_level);
zfcp_fc_conditional_port_scan(adapter);
queue_work(adapter->work_queue, &adapter->ns_up_work);
} else
unregister_service_level(&adapter->service_level);
kref_put(&adapter->ref, zfcp_adapter_release);
break;
}
}
static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
{
struct zfcp_adapter *adapter = zsdev->port->adapter;
struct zfcp_scsi_req_filter filter = {
.tmf_scope = FCP_TMF_TGT_RESET,
.port_handle = zsdev->port->handle,
};
unsigned long flags;
if (tm_flags == FCP_TMF_LUN_RESET) {
filter.tmf_scope = FCP_TMF_LUN_RESET;
filter.lun_handle = zsdev->lun_handle;
}
/*
* abort_lock secures against other processings - in the abort-function
* and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
*/
write_lock_irqsave(&adapter->abort_lock, flags);
zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
&filter);
write_unlock_irqrestore(&adapter->abort_lock, flags);
}
/**
* zfcp_scsi_task_mgmt_function() - Send a task management function (sync).
* @sdev: Pointer to SCSI device to send the task management command to.
* @tm_flags: Task management flags,
* here we only handle %FCP_TMF_TGT_RESET or %FCP_TMF_LUN_RESET.
*/
static int zfcp_scsi_task_mgmt_function(struct scsi_device *sdev, u8 tm_flags)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
struct zfcp_fsf_req *fsf_req = NULL;
int retval = SUCCESS, ret;
int retry = 3;
while (retry--) {
fsf_req = zfcp_fsf_fcp_task_mgmt(sdev, tm_flags);
if (fsf_req)
break;
zfcp_dbf_scsi_devreset("wait", sdev, tm_flags, NULL);
zfcp_erp_wait(adapter);
ret = fc_block_rport(rport);
if (ret) {
zfcp_dbf_scsi_devreset("fiof", sdev, tm_flags, NULL);
return ret;
}
if (!(atomic_read(&adapter->status) &
ZFCP_STATUS_COMMON_RUNNING)) {
zfcp_dbf_scsi_devreset("nres", sdev, tm_flags, NULL);
return SUCCESS;
}
}
if (!fsf_req) {
zfcp_dbf_scsi_devreset("reqf", sdev, tm_flags, NULL);
return FAILED;
}
wait_for_completion(&fsf_req->completion);
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
zfcp_dbf_scsi_devreset("fail", sdev, tm_flags, fsf_req);
retval = FAILED;
} else {
zfcp_dbf_scsi_devreset("okay", sdev, tm_flags, fsf_req);
zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
}
zfcp_fsf_req_free(fsf_req);
return retval;
}
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
{
struct scsi_device *sdev = scpnt->device;
return zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_LUN_RESET);
}
static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
{
struct scsi_target *starget = scsi_target(scpnt->device);
struct fc_rport *rport = starget_to_rport(starget);
struct Scsi_Host *shost = rport_to_shost(rport);
struct scsi_device *sdev = NULL, *tmp_sdev;
struct zfcp_adapter *adapter =
(struct zfcp_adapter *)shost->hostdata[0];
int ret;
shost_for_each_device(tmp_sdev, shost) {
if (tmp_sdev->id == starget->id) {
sdev = tmp_sdev;
break;
}
}
if (!sdev) {
ret = FAILED;
zfcp_dbf_scsi_eh("tr_nosd", adapter, starget->id, ret);
return ret;
}
ret = zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_TGT_RESET);
/* release reference from above shost_for_each_device */
if (sdev)
scsi_device_put(tmp_sdev);
return ret;
}
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
int ret = SUCCESS, fc_ret;
zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
zfcp_erp_wait(adapter);
fc_ret = fc_block_scsi_eh(scpnt);
if (fc_ret)
ret = fc_ret;
zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
return ret;
}
/**
* zfcp_scsi_sysfs_host_reset() - Support scsi_host sysfs attribute host_reset.
* @shost: Pointer to Scsi_Host to perform action on.
* @reset_type: We support %SCSI_ADAPTER_RESET but not %SCSI_FIRMWARE_RESET.
*
* Return: 0 on %SCSI_ADAPTER_RESET, -%EOPNOTSUPP otherwise.
*
* This is similar to zfcp_sysfs_adapter_failed_store().
*/
static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type)
{
struct zfcp_adapter *adapter =
(struct zfcp_adapter *)shost->hostdata[0];
int ret = 0;
if (reset_type != SCSI_ADAPTER_RESET) {
ret = -EOPNOTSUPP;
zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret);
return ret;
}
zfcp_erp_adapter_reset_sync(adapter, "scshr_y");
return ret;
}
struct scsi_transport_template *zfcp_scsi_transport_template;
static struct scsi_host_template zfcp_scsi_host_template = {
.module = THIS_MODULE,
.name = "zfcp",
.queuecommand = zfcp_scsi_queuecommand,
.eh_timed_out = fc_eh_timed_out,
.eh_abort_handler = zfcp_scsi_eh_abort_handler,
.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
.slave_alloc = zfcp_scsi_slave_alloc,
.slave_configure = zfcp_scsi_slave_configure,
.slave_destroy = zfcp_scsi_slave_destroy,
.change_queue_depth = scsi_change_queue_depth,
.host_reset = zfcp_scsi_sysfs_host_reset,
.proc_name = "zfcp",
.can_queue = 4096,
.this_id = -1,
.sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
/* GCD, adjusted later */
.max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
/* GCD, adjusted later */
/* report size limit per scatter-gather segment */
.max_segment_size = ZFCP_QDIO_SBALE_LEN,
.dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
.shost_attrs = zfcp_sysfs_shost_attrs,
.sdev_attrs = zfcp_sysfs_sdev_attrs,
.track_queue_depth = 1,
.supported_mode = MODE_INITIATOR,
};
/**
* zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
* @adapter: The zfcp adapter to register with the SCSI midlayer
*/
int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
{
struct ccw_dev_id dev_id;
if (adapter->scsi_host)
return 0;
ccw_device_get_id(adapter->ccw_device, &dev_id);
/* register adapter as SCSI host with mid layer of SCSI stack */
adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
sizeof (struct zfcp_adapter *));
if (!adapter->scsi_host) {
dev_err(&adapter->ccw_device->dev,
"Registering the FCP device with the "
"SCSI stack failed\n");
return -EIO;
}
/* tell the SCSI stack some characteristics of this adapter */
adapter->scsi_host->max_id = 511;
adapter->scsi_host->max_lun = 0xFFFFFFFF;
adapter->scsi_host->max_channel = 0;
adapter->scsi_host->unique_id = dev_id.devno;
adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
adapter->scsi_host->transportt = zfcp_scsi_transport_template;
adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
scsi_host_put(adapter->scsi_host);
return -EIO;
}
return 0;
}
/**
* zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
* @adapter: The zfcp adapter to unregister.
*/
void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
{
struct Scsi_Host *shost;
struct zfcp_port *port;
shost = adapter->scsi_host;
if (!shost)
return;
read_lock_irq(&adapter->port_list_lock);
list_for_each_entry(port, &adapter->port_list, list)
port->rport = NULL;
read_unlock_irq(&adapter->port_list_lock);
fc_remove_host(shost);
scsi_remove_host(shost);
scsi_host_put(shost);
adapter->scsi_host = NULL;
}
static struct fc_host_statistics*
zfcp_scsi_init_fc_host_stats(struct zfcp_adapter *adapter)
{
struct fc_host_statistics *fc_stats;
if (!adapter->fc_stats) {
fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
if (!fc_stats)
return NULL;
adapter->fc_stats = fc_stats; /* freed in adapter_release */
}
memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
return adapter->fc_stats;
}
static void zfcp_scsi_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
struct fsf_qtcb_bottom_port *data,
struct fsf_qtcb_bottom_port *old)
{
fc_stats->seconds_since_last_reset =
data->seconds_since_last_reset - old->seconds_since_last_reset;
fc_stats->tx_frames = data->tx_frames - old->tx_frames;
fc_stats->tx_words = data->tx_words - old->tx_words;
fc_stats->rx_frames = data->rx_frames - old->rx_frames;
fc_stats->rx_words = data->rx_words - old->rx_words;
fc_stats->lip_count = data->lip - old->lip;
fc_stats->nos_count = data->nos - old->nos;
fc_stats->error_frames = data->error_frames - old->error_frames;
fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
fc_stats->link_failure_count = data->link_failure - old->link_failure;
fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
fc_stats->loss_of_signal_count =
data->loss_of_signal - old->loss_of_signal;
fc_stats->prim_seq_protocol_err_count =
data->psp_error_counts - old->psp_error_counts;
fc_stats->invalid_tx_word_count =
data->invalid_tx_words - old->invalid_tx_words;
fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
fc_stats->fcp_input_requests =
data->input_requests - old->input_requests;
fc_stats->fcp_output_requests =
data->output_requests - old->output_requests;
fc_stats->fcp_control_requests =
data->control_requests - old->control_requests;
fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
}
static void zfcp_scsi_set_fc_host_stats(struct fc_host_statistics *fc_stats,
struct fsf_qtcb_bottom_port *data)
{
fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
fc_stats->tx_frames = data->tx_frames;
fc_stats->tx_words = data->tx_words;
fc_stats->rx_frames = data->rx_frames;
fc_stats->rx_words = data->rx_words;
fc_stats->lip_count = data->lip;
fc_stats->nos_count = data->nos;
fc_stats->error_frames = data->error_frames;
fc_stats->dumped_frames = data->dumped_frames;
fc_stats->link_failure_count = data->link_failure;
fc_stats->loss_of_sync_count = data->loss_of_sync;
fc_stats->loss_of_signal_count = data->loss_of_signal;
fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
fc_stats->invalid_tx_word_count = data->invalid_tx_words;
fc_stats->invalid_crc_count = data->invalid_crcs;
fc_stats->fcp_input_requests = data->input_requests;
fc_stats->fcp_output_requests = data->output_requests;
fc_stats->fcp_control_requests = data->control_requests;
fc_stats->fcp_input_megabytes = data->input_mb;
fc_stats->fcp_output_megabytes = data->output_mb;
}
void refresh_sd_flags(PVBUS_EXT vbus_ext)
{
static int major[] = { SCSI_DISK0_MAJOR, SCSI_DISK1_MAJOR, SCSI_DISK2_MAJOR, SCSI_DISK3_MAJOR,
SCSI_DISK4_MAJOR, SCSI_DISK5_MAJOR, SCSI_DISK6_MAJOR, SCSI_DISK7_MAJOR,
SCSI_DISK8_MAJOR, SCSI_DISK9_MAJOR, SCSI_DISK10_MAJOR, SCSI_DISK11_MAJOR,
SCSI_DISK12_MAJOR, SCSI_DISK13_MAJOR, SCSI_DISK14_MAJOR, SCSI_DISK15_MAJOR, 0 };
int id;
Scsi_Device *SDptr;
vbus_ext->needs_refresh = 0;
for (id=0; id<osm_max_targets; id++) {
SDptr = scsi_device_lookup(vbus_ext->host, 0, id, 0);
vbus_ext->sd_flags[id] &= ~SD_FLAG_IN_USE;
if (SDptr) {
int i, minor;
for (i=0; major[i]; i++) {
for (minor=0; minor<=240; minor+=16) {
struct block_device *bdev = bdget(MKDEV(major[i], minor));
if (bdev &&
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38)
blkdev_get(bdev, FMODE_READ,NULL)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
blkdev_get(bdev, FMODE_READ)
#else
blkdev_get(bdev, FMODE_READ, 0 __BDEV_RAW)
#endif
==0) {
if (bdev->bd_disk && bdev->bd_disk->driverfs_dev==&SDptr->sdev_gendev) {
if (vbus_ext->sd_flags[id] & SD_FLAG_REVALIDATE) {
if (bdev->bd_disk->fops->revalidate_disk)
bdev->bd_disk->fops->revalidate_disk(bdev->bd_disk);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
mutex_lock(&bdev->bd_inode->i_mutex);
#else
down(&bdev->bd_inode->i_sem);
#endif
i_size_write(bdev->bd_inode, (loff_t)get_capacity(bdev->bd_disk)<<9);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
mutex_unlock(&bdev->bd_inode->i_mutex);
#else
up(&bdev->bd_inode->i_sem);
#endif
vbus_ext->sd_flags[id] &= ~SD_FLAG_REVALIDATE;
}
if (bdev->bd_openers>1)
vbus_ext->sd_flags[id] |= SD_FLAG_IN_USE;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
blkdev_put(bdev, FMODE_READ);
#else
blkdev_put(bdev __BDEV_RAW);
#endif
goto next;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
blkdev_put(bdev, FMODE_READ);
#else
blkdev_put(bdev __BDEV_RAW);
#endif
}
}
}
next:
scsi_device_put(SDptr);
}
}
}
static void scsifront_free(struct vscsifrnt_info *info)
{
struct Scsi_Host *host = info->host;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
if (host->shost_state != SHOST_DEL) {
#else
if (!test_bit(SHOST_DEL, &host->shost_state)) {
#endif
scsi_remove_host(info->host);
}
if (info->ring_ref != GRANT_INVALID_REF) {
gnttab_end_foreign_access(info->ring_ref,
(unsigned long)info->ring.sring);
info->ring_ref = GRANT_INVALID_REF;
info->ring.sring = NULL;
}
if (info->irq)
unbind_from_irqhandler(info->irq, info);
info->irq = 0;
scsi_host_put(info->host);
}
static int scsifront_alloc_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct vscsiif_sring *sring;
int err = -ENOMEM;
info->ring_ref = GRANT_INVALID_REF;
/***** Frontend to Backend ring start *****/
sring = (struct vscsiif_sring *) __get_free_page(GFP_KERNEL);
if (!sring) {
xenbus_dev_fatal(dev, err, "fail to allocate shared ring (Front to Back)");
return err;
}
SHARED_RING_INIT(sring);
FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE);
err = xenbus_grant_ring(dev, virt_to_mfn(sring));
if (err < 0) {
free_page((unsigned long) sring);
info->ring.sring = NULL;
xenbus_dev_fatal(dev, err, "fail to grant shared ring (Front to Back)");
goto free_sring;
}
info->ring_ref = err;
err = bind_listening_port_to_irqhandler(
dev->otherend_id, scsifront_intr,
SA_SAMPLE_RANDOM, "scsifront", info);
if (err <= 0) {
xenbus_dev_fatal(dev, err, "bind_listening_port_to_irqhandler");
goto free_sring;
}
info->irq = err;
return 0;
/* free resource */
free_sring:
scsifront_free(info);
return err;
}
static int scsifront_init_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct xenbus_transaction xbt;
int err;
DPRINTK("%s\n",__FUNCTION__);
err = scsifront_alloc_ring(info);
if (err)
return err;
DPRINTK("%u %u\n", info->ring_ref, info->evtchn);
again:
err = xenbus_transaction_start(&xbt);
if (err) {
xenbus_dev_fatal(dev, err, "starting transaction");
}
err = xenbus_printf(xbt, dev->nodename, "ring-ref", "%u",
info->ring_ref);
if (err) {
xenbus_dev_fatal(dev, err, "%s", "writing ring-ref");
goto fail;
}
err = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
irq_to_evtchn_port(info->irq));
if (err) {
xenbus_dev_fatal(dev, err, "%s", "writing event-channel");
goto fail;
}
err = xenbus_transaction_end(xbt, 0);
if (err) {
if (err == -EAGAIN)
goto again;
xenbus_dev_fatal(dev, err, "completing transaction");
goto free_sring;
}
return 0;
fail:
xenbus_transaction_end(xbt, 1);
free_sring:
/* free resource */
scsifront_free(info);
return err;
}
static int scsifront_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
struct vscsifrnt_info *info;
struct Scsi_Host *host;
int i, err = -ENOMEM;
char name[DEFAULT_TASK_COMM_LEN];
host = scsi_host_alloc(&scsifront_sht, sizeof(*info));
if (!host) {
xenbus_dev_fatal(dev, err, "fail to allocate scsi host");
return err;
}
info = (struct vscsifrnt_info *) host->hostdata;
info->host = host;
dev->dev.driver_data = info;
info->dev = dev;
for (i = 0; i < VSCSIIF_MAX_REQS; i++) {
info->shadow[i].next_free = i + 1;
init_waitqueue_head(&(info->shadow[i].wq_reset));
info->shadow[i].wait_reset = 0;
}
info->shadow[VSCSIIF_MAX_REQS - 1].next_free = 0x0fff;
err = scsifront_init_ring(info);
if (err) {
scsi_host_put(host);
return err;
}
init_waitqueue_head(&info->wq);
spin_lock_init(&info->io_lock);
spin_lock_init(&info->shadow_lock);
snprintf(name, DEFAULT_TASK_COMM_LEN, "vscsiif.%d", info->host->host_no);
info->kthread = kthread_run(scsifront_schedule, info, name);
if (IS_ERR(info->kthread)) {
err = PTR_ERR(info->kthread);
info->kthread = NULL;
printk(KERN_ERR "scsifront: kthread start err %d\n", err);
goto free_sring;
}
host->max_id = VSCSIIF_MAX_TARGET;
host->max_channel = 0;
host->max_lun = VSCSIIF_MAX_LUN;
host->max_sectors = (VSCSIIF_SG_TABLESIZE - 1) * PAGE_SIZE / 512;
err = scsi_add_host(host, &dev->dev);
if (err) {
printk(KERN_ERR "scsifront: fail to add scsi host %d\n", err);
goto free_sring;
}
xenbus_switch_state(dev, XenbusStateInitialised);
return 0;
free_sring:
/* free resource */
scsifront_free(info);
return err;
}
static int scsifront_remove(struct xenbus_device *dev)
{
struct vscsifrnt_info *info = dev->dev.driver_data;
DPRINTK("%s: %s removed\n",__FUNCTION__ ,dev->nodename);
if (info->kthread) {
kthread_stop(info->kthread);
info->kthread = NULL;
}
scsifront_free(info);
return 0;
}
static int scsifront_disconnect(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct Scsi_Host *host = info->host;
DPRINTK("%s: %s disconnect\n",__FUNCTION__ ,dev->nodename);
/*
When this function is executed, all devices of
Frontend have been deleted.
Therefore, it need not block I/O before remove_host.
*/
scsi_remove_host(host);
xenbus_frontend_closed(dev);
return 0;
}
#define VSCSIFRONT_OP_ADD_LUN 1
#define VSCSIFRONT_OP_DEL_LUN 2
static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
{
struct xenbus_device *dev = info->dev;
int i, err = 0;
char str[64], state_str[64];
char **dir;
unsigned int dir_n = 0;
unsigned int device_state;
unsigned int hst, chn, tgt, lun;
struct scsi_device *sdev;
dir = xenbus_directory(XBT_NIL, dev->otherend, "vscsi-devs", &dir_n);
if (IS_ERR(dir))
return;
for (i = 0; i < dir_n; i++) {
/* read status */
snprintf(str, sizeof(str), "vscsi-devs/%s/state", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str, "%u",
&device_state);
if (XENBUS_EXIST_ERR(err))
continue;
/* virtual SCSI device */
snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str,
"%u:%u:%u:%u", &hst, &chn, &tgt, &lun);
if (XENBUS_EXIST_ERR(err))
continue;
/* front device state path */
snprintf(state_str, sizeof(state_str), "vscsi-devs/%s/state", dir[i]);
switch (op) {
case VSCSIFRONT_OP_ADD_LUN:
if (device_state == XenbusStateInitialised) {
sdev = scsi_device_lookup(info->host, chn, tgt, lun);
if (sdev) {
printk(KERN_ERR "scsifront: Device already in use.\n");
scsi_device_put(sdev);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateClosed);
} else {
scsi_add_device(info->host, chn, tgt, lun);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateConnected);
}
}
break;
case VSCSIFRONT_OP_DEL_LUN:
if (device_state == XenbusStateClosing) {
sdev = scsi_device_lookup(info->host, chn, tgt, lun);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateClosed);
}
}
break;
default:
break;
}
}
kfree(dir);
return;
}
static void scsifront_backend_changed(struct xenbus_device *dev,
enum xenbus_state backend_state)
{
struct vscsifrnt_info *info = dev->dev.driver_data;
DPRINTK("%p %u %u\n", dev, dev->state, backend_state);
switch (backend_state) {
case XenbusStateUnknown:
case XenbusStateInitialising:
case XenbusStateInitWait:
case XenbusStateClosed:
break;
case XenbusStateInitialised:
break;
case XenbusStateConnected:
if (xenbus_read_driver_state(dev->nodename) ==
XenbusStateInitialised) {
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
}
if (dev->state == XenbusStateConnected)
break;
xenbus_switch_state(dev, XenbusStateConnected);
break;
case XenbusStateClosing:
scsifront_disconnect(info);
break;
case XenbusStateReconfiguring:
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_DEL_LUN);
xenbus_switch_state(dev, XenbusStateReconfiguring);
break;
case XenbusStateReconfigured:
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
xenbus_switch_state(dev, XenbusStateConnected);
break;
}
}
static struct xenbus_device_id scsifront_ids[] = {
{ "vscsi" },
{ "" }
};
MODULE_ALIAS("xen:vscsi");
static struct xenbus_driver scsifront_driver = {
.name = "vscsi",
.owner = THIS_MODULE,
.ids = scsifront_ids,
.probe = scsifront_probe,
.remove = scsifront_remove,
/* .resume = scsifront_resume, */
.otherend_changed = scsifront_backend_changed,
};
int scsifront_xenbus_init(void)
{
return xenbus_register_frontend(&scsifront_driver);
}
void scsifront_xenbus_unregister(void)
{
xenbus_unregister_driver(&scsifront_driver);
}
static int
adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
struct cciss_scsi_dev_t sd[], int nsds)
{
/* sd contains scsi3 addresses and devtypes, but
bus target and lun are not filled in. This funciton
takes what's in sd to be the current and adjusts
ccissscsi[] to be in line with what's in sd. */
int i,j, found, changes=0;
struct cciss_scsi_dev_t *csd;
unsigned long flags;
struct scsi2map *added, *removed;
int nadded, nremoved;
struct Scsi_Host *sh = NULL;
added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
GFP_KERNEL);
removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
GFP_KERNEL);
if (!added || !removed) {
dev_warn(&h->pdev->dev,
"Out of memory in adjust_cciss_scsi_table\n");
goto free_and_out;
}
CPQ_TAPE_LOCK(h, flags);
if (hostno != -1) /* if it's not the first time... */
sh = h->scsi_ctlr->scsi_host;
/* find any devices in ccissscsi[] that are not in
sd[] and remove them from ccissscsi[] */
i = 0;
nremoved = 0;
nadded = 0;
while (i < ccissscsi[h->ctlr].ndevices) {
csd = &ccissscsi[h->ctlr].dev[i];
found=0;
for (j=0;j<nsds;j++) {
if (SCSI3ADDR_EQ(sd[j].scsi3addr,
csd->scsi3addr)) {
if (device_is_the_same(&sd[j], csd))
found=2;
else
found=1;
break;
}
}
if (found == 0) { /* device no longer present. */
changes++;
cciss_scsi_remove_entry(h, hostno, i,
removed, &nremoved);
/* remove ^^^, hence i not incremented */
} else if (found == 1) { /* device is different in some way */
changes++;
dev_info(&h->pdev->dev,
"device c%db%dt%dl%d has changed.\n",
hostno, csd->bus, csd->target, csd->lun);
cciss_scsi_remove_entry(h, hostno, i,
removed, &nremoved);
/* remove ^^^, hence i not incremented */
if (cciss_scsi_add_entry(h, hostno, &sd[j],
added, &nadded) != 0)
/* we just removed one, so add can't fail. */
BUG();
csd->devtype = sd[j].devtype;
memcpy(csd->device_id, sd[j].device_id,
sizeof(csd->device_id));
memcpy(csd->vendor, sd[j].vendor,
sizeof(csd->vendor));
memcpy(csd->model, sd[j].model,
sizeof(csd->model));
memcpy(csd->revision, sd[j].revision,
sizeof(csd->revision));
} else /* device is same as it ever was, */
i++; /* so just move along. */
}
/* Now, make sure every device listed in sd[] is also
listed in ccissscsi[], adding them if they aren't found */
for (i=0;i<nsds;i++) {
found=0;
for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
csd = &ccissscsi[h->ctlr].dev[j];
if (SCSI3ADDR_EQ(sd[i].scsi3addr,
csd->scsi3addr)) {
if (device_is_the_same(&sd[i], csd))
found=2; /* found device */
else
found=1; /* found a bug. */
break;
}
}
if (!found) {
changes++;
if (cciss_scsi_add_entry(h, hostno, &sd[i],
added, &nadded) != 0)
break;
} else if (found == 1) {
/* should never happen... */
changes++;
dev_warn(&h->pdev->dev,
"device unexpectedly changed\n");
/* but if it does happen, we just ignore that device */
}
}
CPQ_TAPE_UNLOCK(h, flags);
/* Don't notify scsi mid layer of any changes the first time through */
/* (or if there are no changes) scsi_scan_host will do it later the */
/* first time through. */
if (hostno == -1 || !changes)
goto free_and_out;
/* Notify scsi mid layer of any removed devices */
for (i = 0; i < nremoved; i++) {
struct scsi_device *sdev =
scsi_device_lookup(sh, removed[i].bus,
removed[i].target, removed[i].lun);
if (sdev != NULL) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
} else {
/* We don't expect to get here. */
/* future cmds to this device will get selection */
/* timeout as if the device was gone. */
dev_warn(&h->pdev->dev, "didn't find "
"c%db%dt%dl%d\n for removal.",
hostno, removed[i].bus,
removed[i].target, removed[i].lun);
}
}
/* Notify scsi mid layer of any added devices */
for (i = 0; i < nadded; i++) {
int rc;
rc = scsi_add_device(sh, added[i].bus,
added[i].target, added[i].lun);
if (rc == 0)
continue;
dev_warn(&h->pdev->dev, "scsi_add_device "
"c%db%dt%dl%d failed, device not added.\n",
hostno, added[i].bus, added[i].target, added[i].lun);
/* now we have to remove it from ccissscsi, */
/* since it didn't get added to scsi mid layer */
fixup_botched_add(h, added[i].scsi3addr);
}
free_and_out:
kfree(added);
kfree(removed);
return 0;
}
