![Steffen Maier](/assets/img/avatar_default.png)
zfcp_scsi_slave_destroy erroneously always tried to finish its task even if the corresponding previous zfcp_scsi_slave_alloc returned early. This can lead to kernel page faults on accessing uninitialized fields of struct zfcp_scsi_dev in zfcp_erp_lun_shutdown_wait. Take the port field of the struct to determine if slave_alloc returned early. This zfcp bug is exposed by4e6c82b
(in turn fixingf7c9c6b
to be compatible with21208ae
) which can call slave_destroy for a corresponding previous slave_alloc that did not finish. This patch is based on James Bottomley's fix suggestion in http://www.spinics.net/lists/linux-scsi/msg55449.html. Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Cc: <stable@kernel.org> #2.6.38+ Signed-off-by: James Bottomley <JBottomley@Parallels.com>
730 lines
21 KiB
C
730 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 Corporation 2002, 2010
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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 = 1, /* adjusted later */
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.max_sectors = 8, /* 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 =
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data->loss_of_signal - old->loss_of_signal;
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fc_stats->prim_seq_protocol_err_count =
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data->psp_error_counts - old->psp_error_counts;
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fc_stats->invalid_tx_word_count =
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data->invalid_tx_words - old->invalid_tx_words;
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fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
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fc_stats->fcp_input_requests =
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data->input_requests - old->input_requests;
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fc_stats->fcp_output_requests =
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data->output_requests - old->output_requests;
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fc_stats->fcp_control_requests =
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data->control_requests - old->control_requests;
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fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
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fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
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}
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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),
|
|
};
|