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5fea4291de
Commit 86a9668a8d
"[SCSI] zfcp: support for hardware data router"
reduced the initial block queue limits in the scsi_host_template to the
absolute minimum and adjusted them later on. However, the adjustment was
too late for the BSG devices of Scsi_Host and fc_host.
Therefore, ioctl(..., SG_IO, ...) with request or response size > 4kB to a
BSG device of an fc_host or a Scsi_Host fails with EINVAL. As a result,
users of such ioctl such as HBA_SendCTPassThru() in libzfcphbaapi return
with error HBA_STATUS_ERROR.
Initialize the block queue limits in zfcp_scsi_host_template to the
greatest common denominator (GCD).
While we cannot exploit the slightly enlarged maximum request size with
data router, this should be neglectible. Doing so also avoids running into
trouble after live guest relocation (LGR) / migration from a data router
FCP device to an FCP device that does not support data router. In that
case, zfcp would figure out the new limits on adapter recovery, but the
fc_host and Scsi_Host (plus in fact all sdevs) still exist with the old and
now too large queue limits.
It should also OK, not to use half the size as in the DIX case, because
fc_host and Scsi_Host do not transport FCP requests including SCSI commands
using protection data.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> #3.2+
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
733 lines
21 KiB
C
733 lines
21 KiB
C
/*
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* zfcp device driver
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*
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* Interface to Linux SCSI midlayer.
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*
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* Copyright IBM Corp. 2002, 2013
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*/
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#define KMSG_COMPONENT "zfcp"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <scsi/fc/fc_fcp.h>
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#include <scsi/scsi_eh.h>
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#include <linux/atomic.h>
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#include "zfcp_ext.h"
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#include "zfcp_dbf.h"
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#include "zfcp_fc.h"
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#include "zfcp_reqlist.h"
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static unsigned int default_depth = 32;
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module_param_named(queue_depth, default_depth, uint, 0600);
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MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
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static bool enable_dif;
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module_param_named(dif, enable_dif, bool, 0400);
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MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support");
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static bool allow_lun_scan = 1;
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module_param(allow_lun_scan, bool, 0600);
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MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
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static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
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int reason)
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{
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switch (reason) {
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case SCSI_QDEPTH_DEFAULT:
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scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
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break;
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case SCSI_QDEPTH_QFULL:
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scsi_track_queue_full(sdev, depth);
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break;
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case SCSI_QDEPTH_RAMP_UP:
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scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return sdev->queue_depth;
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}
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static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
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{
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
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/* if previous slave_alloc returned early, there is nothing to do */
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if (!zfcp_sdev->port)
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return;
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zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
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put_device(&zfcp_sdev->port->dev);
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}
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static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
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{
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if (sdp->tagged_supported)
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scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
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else
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scsi_adjust_queue_depth(sdp, 0, 1);
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return 0;
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}
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static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
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{
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set_host_byte(scpnt, result);
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zfcp_dbf_scsi_fail_send(scpnt);
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scpnt->scsi_done(scpnt);
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}
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static
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int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
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{
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
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struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
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int status, scsi_result, ret;
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/* reset the status for this request */
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scpnt->result = 0;
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scpnt->host_scribble = NULL;
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scsi_result = fc_remote_port_chkready(rport);
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if (unlikely(scsi_result)) {
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scpnt->result = scsi_result;
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zfcp_dbf_scsi_fail_send(scpnt);
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scpnt->scsi_done(scpnt);
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return 0;
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}
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status = atomic_read(&zfcp_sdev->status);
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if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
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!(atomic_read(&zfcp_sdev->port->status) &
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ZFCP_STATUS_COMMON_ERP_FAILED)) {
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/* only LUN access denied, but port is good
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* not covered by FC transport, have to fail here */
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zfcp_scsi_command_fail(scpnt, DID_ERROR);
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return 0;
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}
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if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
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/* This could be either
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* open LUN pending: this is temporary, will result in
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* open LUN or ERP_FAILED, so retry command
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* call to rport_delete pending: mimic retry from
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* fc_remote_port_chkready until rport is BLOCKED
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*/
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zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
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return 0;
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}
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ret = zfcp_fsf_fcp_cmnd(scpnt);
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if (unlikely(ret == -EBUSY))
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return SCSI_MLQUEUE_DEVICE_BUSY;
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else if (unlikely(ret < 0))
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return SCSI_MLQUEUE_HOST_BUSY;
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return ret;
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}
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static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
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{
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struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
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struct zfcp_adapter *adapter =
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(struct zfcp_adapter *) sdev->host->hostdata[0];
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
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struct zfcp_port *port;
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struct zfcp_unit *unit;
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int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE;
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port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
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if (!port)
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return -ENXIO;
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unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
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if (unit)
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put_device(&unit->dev);
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if (!unit && !(allow_lun_scan && npiv)) {
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put_device(&port->dev);
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return -ENXIO;
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}
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zfcp_sdev->port = port;
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zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
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zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
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zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
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zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
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zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
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zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
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spin_lock_init(&zfcp_sdev->latencies.lock);
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zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
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zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
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zfcp_erp_wait(port->adapter);
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return 0;
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}
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static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
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{
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struct Scsi_Host *scsi_host = scpnt->device->host;
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struct zfcp_adapter *adapter =
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(struct zfcp_adapter *) scsi_host->hostdata[0];
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struct zfcp_fsf_req *old_req, *abrt_req;
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unsigned long flags;
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unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
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int retval = SUCCESS, ret;
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int retry = 3;
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char *dbf_tag;
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/* avoid race condition between late normal completion and abort */
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write_lock_irqsave(&adapter->abort_lock, flags);
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old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
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if (!old_req) {
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
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return FAILED; /* completion could be in progress */
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}
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old_req->data = NULL;
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/* don't access old fsf_req after releasing the abort_lock */
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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while (retry--) {
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abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
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if (abrt_req)
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break;
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zfcp_erp_wait(adapter);
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ret = fc_block_scsi_eh(scpnt);
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if (ret) {
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zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
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return ret;
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}
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_COMMON_RUNNING)) {
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zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
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return SUCCESS;
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}
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}
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if (!abrt_req) {
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zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
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return FAILED;
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}
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wait_for_completion(&abrt_req->completion);
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if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
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dbf_tag = "abrt_ok";
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else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
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dbf_tag = "abrt_nn";
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else {
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dbf_tag = "abrt_fa";
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retval = FAILED;
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}
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zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
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zfcp_fsf_req_free(abrt_req);
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return retval;
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}
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static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
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{
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
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struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
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struct zfcp_fsf_req *fsf_req = NULL;
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int retval = SUCCESS, ret;
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int retry = 3;
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while (retry--) {
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fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
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if (fsf_req)
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break;
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zfcp_erp_wait(adapter);
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ret = fc_block_scsi_eh(scpnt);
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if (ret)
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return ret;
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_COMMON_RUNNING)) {
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zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags);
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return SUCCESS;
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}
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}
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if (!fsf_req)
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return FAILED;
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wait_for_completion(&fsf_req->completion);
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if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
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zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags);
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retval = FAILED;
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} else
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zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags);
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zfcp_fsf_req_free(fsf_req);
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return retval;
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}
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static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
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{
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return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
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}
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static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
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{
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return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
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}
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static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
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{
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
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struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
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int ret;
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zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
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zfcp_erp_wait(adapter);
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ret = fc_block_scsi_eh(scpnt);
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if (ret)
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return ret;
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return SUCCESS;
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}
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struct scsi_transport_template *zfcp_scsi_transport_template;
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static struct scsi_host_template zfcp_scsi_host_template = {
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.module = THIS_MODULE,
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.name = "zfcp",
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.queuecommand = zfcp_scsi_queuecommand,
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.eh_abort_handler = zfcp_scsi_eh_abort_handler,
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.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
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.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
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.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
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.slave_alloc = zfcp_scsi_slave_alloc,
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.slave_configure = zfcp_scsi_slave_configure,
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.slave_destroy = zfcp_scsi_slave_destroy,
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.change_queue_depth = zfcp_scsi_change_queue_depth,
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.proc_name = "zfcp",
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.can_queue = 4096,
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.this_id = -1,
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.sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
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* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
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/* GCD, adjusted later */
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.max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
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* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
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/* GCD, adjusted later */
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.dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
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.cmd_per_lun = 1,
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.use_clustering = 1,
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.shost_attrs = zfcp_sysfs_shost_attrs,
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.sdev_attrs = zfcp_sysfs_sdev_attrs,
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};
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/**
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* zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
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* @adapter: The zfcp adapter to register with the SCSI midlayer
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*/
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int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
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{
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struct ccw_dev_id dev_id;
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if (adapter->scsi_host)
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return 0;
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ccw_device_get_id(adapter->ccw_device, &dev_id);
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/* register adapter as SCSI host with mid layer of SCSI stack */
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adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
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sizeof (struct zfcp_adapter *));
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if (!adapter->scsi_host) {
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dev_err(&adapter->ccw_device->dev,
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"Registering the FCP device with the "
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"SCSI stack failed\n");
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return -EIO;
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}
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/* tell the SCSI stack some characteristics of this adapter */
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adapter->scsi_host->max_id = 511;
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adapter->scsi_host->max_lun = 0xFFFFFFFF;
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adapter->scsi_host->max_channel = 0;
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adapter->scsi_host->unique_id = dev_id.devno;
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adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
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adapter->scsi_host->transportt = zfcp_scsi_transport_template;
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adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
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if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
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scsi_host_put(adapter->scsi_host);
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return -EIO;
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}
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return 0;
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}
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/**
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* zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
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* @adapter: The zfcp adapter to unregister.
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*/
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void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
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{
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struct Scsi_Host *shost;
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struct zfcp_port *port;
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shost = adapter->scsi_host;
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if (!shost)
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return;
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read_lock_irq(&adapter->port_list_lock);
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list_for_each_entry(port, &adapter->port_list, list)
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port->rport = NULL;
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read_unlock_irq(&adapter->port_list_lock);
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fc_remove_host(shost);
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scsi_remove_host(shost);
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scsi_host_put(shost);
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adapter->scsi_host = NULL;
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}
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static struct fc_host_statistics*
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zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
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{
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struct fc_host_statistics *fc_stats;
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if (!adapter->fc_stats) {
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fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
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if (!fc_stats)
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return NULL;
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adapter->fc_stats = fc_stats; /* freed in adapter_release */
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}
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memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
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return adapter->fc_stats;
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}
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static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
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struct fsf_qtcb_bottom_port *data,
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struct fsf_qtcb_bottom_port *old)
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{
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fc_stats->seconds_since_last_reset =
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data->seconds_since_last_reset - old->seconds_since_last_reset;
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fc_stats->tx_frames = data->tx_frames - old->tx_frames;
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fc_stats->tx_words = data->tx_words - old->tx_words;
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fc_stats->rx_frames = data->rx_frames - old->rx_frames;
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fc_stats->rx_words = data->rx_words - old->rx_words;
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fc_stats->lip_count = data->lip - old->lip;
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fc_stats->nos_count = data->nos - old->nos;
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fc_stats->error_frames = data->error_frames - old->error_frames;
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fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
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fc_stats->link_failure_count = data->link_failure - old->link_failure;
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fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
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|
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_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;
|
|
}
|
|
|
|
static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fc_host_statistics *fc_stats;
|
|
struct fsf_qtcb_bottom_port *data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)host->hostdata[0];
|
|
fc_stats = zfcp_init_fc_host_stats(adapter);
|
|
if (!fc_stats)
|
|
return NULL;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return NULL;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
|
if (ret) {
|
|
kfree(data);
|
|
return NULL;
|
|
}
|
|
|
|
if (adapter->stats_reset &&
|
|
((jiffies/HZ - adapter->stats_reset) <
|
|
data->seconds_since_last_reset))
|
|
zfcp_adjust_fc_host_stats(fc_stats, data,
|
|
adapter->stats_reset_data);
|
|
else
|
|
zfcp_set_fc_host_stats(fc_stats, data);
|
|
|
|
kfree(data);
|
|
return fc_stats;
|
|
}
|
|
|
|
static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fsf_qtcb_bottom_port *data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
|
if (ret)
|
|
kfree(data);
|
|
else {
|
|
adapter->stats_reset = jiffies/HZ;
|
|
kfree(adapter->stats_reset_data);
|
|
adapter->stats_reset_data = data; /* finally freed in
|
|
adapter_release */
|
|
}
|
|
}
|
|
|
|
static void zfcp_get_host_port_state(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
|
int status = atomic_read(&adapter->status);
|
|
|
|
if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
|
|
!(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
|
|
else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
|
|
fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
|
|
else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
|
|
else
|
|
fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
|
|
}
|
|
|
|
static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
|
|
{
|
|
rport->dev_loss_tmo = timeout;
|
|
}
|
|
|
|
/**
|
|
* zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
|
|
* @rport: The FC rport where to teminate I/O
|
|
*
|
|
* Abort all pending SCSI commands for a port by closing the
|
|
* port. Using a reopen avoids a conflict with a shutdown
|
|
* overwriting a reopen. The "forced" ensures that a disappeared port
|
|
* is not opened again as valid due to the cached plogi data in
|
|
* non-NPIV mode.
|
|
*/
|
|
static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
|
|
{
|
|
struct zfcp_port *port;
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
|
|
|
|
if (port) {
|
|
zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
|
|
put_device(&port->dev);
|
|
}
|
|
}
|
|
|
|
static void zfcp_scsi_rport_register(struct zfcp_port *port)
|
|
{
|
|
struct fc_rport_identifiers ids;
|
|
struct fc_rport *rport;
|
|
|
|
if (port->rport)
|
|
return;
|
|
|
|
ids.node_name = port->wwnn;
|
|
ids.port_name = port->wwpn;
|
|
ids.port_id = port->d_id;
|
|
ids.roles = FC_RPORT_ROLE_FCP_TARGET;
|
|
|
|
rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
|
|
if (!rport) {
|
|
dev_err(&port->adapter->ccw_device->dev,
|
|
"Registering port 0x%016Lx failed\n",
|
|
(unsigned long long)port->wwpn);
|
|
return;
|
|
}
|
|
|
|
rport->maxframe_size = port->maxframe_size;
|
|
rport->supported_classes = port->supported_classes;
|
|
port->rport = rport;
|
|
port->starget_id = rport->scsi_target_id;
|
|
|
|
zfcp_unit_queue_scsi_scan(port);
|
|
}
|
|
|
|
static void zfcp_scsi_rport_block(struct zfcp_port *port)
|
|
{
|
|
struct fc_rport *rport = port->rport;
|
|
|
|
if (rport) {
|
|
fc_remote_port_delete(rport);
|
|
port->rport = NULL;
|
|
}
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
|
|
{
|
|
get_device(&port->dev);
|
|
port->rport_task = RPORT_ADD;
|
|
|
|
if (!queue_work(port->adapter->work_queue, &port->rport_work))
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
|
|
{
|
|
get_device(&port->dev);
|
|
port->rport_task = RPORT_DEL;
|
|
|
|
if (port->rport && queue_work(port->adapter->work_queue,
|
|
&port->rport_work))
|
|
return;
|
|
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
|
|
{
|
|
unsigned long flags;
|
|
struct zfcp_port *port;
|
|
|
|
read_lock_irqsave(&adapter->port_list_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list, list)
|
|
zfcp_scsi_schedule_rport_block(port);
|
|
read_unlock_irqrestore(&adapter->port_list_lock, flags);
|
|
}
|
|
|
|
void zfcp_scsi_rport_work(struct work_struct *work)
|
|
{
|
|
struct zfcp_port *port = container_of(work, struct zfcp_port,
|
|
rport_work);
|
|
|
|
while (port->rport_task) {
|
|
if (port->rport_task == RPORT_ADD) {
|
|
port->rport_task = RPORT_NONE;
|
|
zfcp_scsi_rport_register(port);
|
|
} else {
|
|
port->rport_task = RPORT_NONE;
|
|
zfcp_scsi_rport_block(port);
|
|
}
|
|
}
|
|
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
/**
|
|
* zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
|
|
* @adapter: The adapter where to configure DIF/DIX for the SCSI host
|
|
*/
|
|
void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
|
|
{
|
|
unsigned int mask = 0;
|
|
unsigned int data_div;
|
|
struct Scsi_Host *shost = adapter->scsi_host;
|
|
|
|
data_div = atomic_read(&adapter->status) &
|
|
ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
|
|
|
|
if (enable_dif &&
|
|
adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
|
|
mask |= SHOST_DIF_TYPE1_PROTECTION;
|
|
|
|
if (enable_dif && data_div &&
|
|
adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
|
|
mask |= SHOST_DIX_TYPE1_PROTECTION;
|
|
scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
|
|
shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
|
|
shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
|
|
shost->max_sectors = shost->sg_tablesize * 8;
|
|
}
|
|
|
|
scsi_host_set_prot(shost, mask);
|
|
}
|
|
|
|
/**
|
|
* zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
|
|
* @scmd: The SCSI command to report the error for
|
|
* @ascq: The ASCQ to put in the sense buffer
|
|
*
|
|
* See the error handling in sd_done for the sense codes used here.
|
|
* Set DID_SOFT_ERROR to retry the request, if possible.
|
|
*/
|
|
void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
|
|
{
|
|
scsi_build_sense_buffer(1, scmd->sense_buffer,
|
|
ILLEGAL_REQUEST, 0x10, ascq);
|
|
set_driver_byte(scmd, DRIVER_SENSE);
|
|
scmd->result |= SAM_STAT_CHECK_CONDITION;
|
|
set_host_byte(scmd, DID_SOFT_ERROR);
|
|
}
|
|
|
|
struct fc_function_template zfcp_transport_functions = {
|
|
.show_starget_port_id = 1,
|
|
.show_starget_port_name = 1,
|
|
.show_starget_node_name = 1,
|
|
.show_rport_supported_classes = 1,
|
|
.show_rport_maxframe_size = 1,
|
|
.show_rport_dev_loss_tmo = 1,
|
|
.show_host_node_name = 1,
|
|
.show_host_port_name = 1,
|
|
.show_host_permanent_port_name = 1,
|
|
.show_host_supported_classes = 1,
|
|
.show_host_supported_fc4s = 1,
|
|
.show_host_supported_speeds = 1,
|
|
.show_host_maxframe_size = 1,
|
|
.show_host_serial_number = 1,
|
|
.get_fc_host_stats = zfcp_get_fc_host_stats,
|
|
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
|
|
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
|
|
.get_host_port_state = zfcp_get_host_port_state,
|
|
.terminate_rport_io = zfcp_scsi_terminate_rport_io,
|
|
.show_host_port_state = 1,
|
|
.show_host_active_fc4s = 1,
|
|
.bsg_request = zfcp_fc_exec_bsg_job,
|
|
.bsg_timeout = zfcp_fc_timeout_bsg_job,
|
|
/* no functions registered for following dynamic attributes but
|
|
directly set by LLDD */
|
|
.show_host_port_type = 1,
|
|
.show_host_symbolic_name = 1,
|
|
.show_host_speed = 1,
|
|
.show_host_port_id = 1,
|
|
.dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
|
|
};
|