/**
- * fc_rport_create - allocates and creates a remote FC port.
+ * fc_remote_port_create - allocates and creates a remote FC port.
* @shost: scsi host the remote port is connected to.
* @channel: Channel on shost port connected to.
* @ids: The world wide names, fc address, and FC4 port
* This routine assumes no locks are held on entry.
*/
static struct fc_rport *
-fc_rport_create(struct Scsi_Host *shost, int channel,
- struct fc_rport_identifiers *ids)
+fc_remote_port_create(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
{
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
struct fc_internal *fci = to_fc_internal(shost->transportt);
spin_unlock_irqrestore(shost->host_lock, flags);
/* No consistent binding found - create new remote port entry */
- rport = fc_rport_create(shost, channel, ids);
+ rport = fc_remote_port_create(shost, channel, ids);
return rport;
}
* @job: fc_bsg_job that is to be torn down
*/
static void
-fc_destroy_bsgjob(struct fc_bsg_job *job)
+fc_destroy_bsgjob(struct kref *kref)
{
- unsigned long flags;
+ struct fc_bsg_job *job = container_of(kref, struct fc_bsg_job, kref);
+ struct request *rq = job->req;
- spin_lock_irqsave(&job->job_lock, flags);
- if (job->ref_cnt) {
- spin_unlock_irqrestore(&job->job_lock, flags);
- return;
- }
- spin_unlock_irqrestore(&job->job_lock, flags);
+ blk_end_request_all(rq, rq->errors);
put_device(job->dev); /* release reference for the request */
* fc_bsg_jobdone - completion routine for bsg requests that the LLD has
* completed
* @job: fc_bsg_job that is complete
+ * @result: job reply result
+ * @reply_payload_rcv_len: length of payload received
*/
-static void
-fc_bsg_jobdone(struct fc_bsg_job *job)
+void fc_bsg_jobdone(struct fc_bsg_job *job, int result,
+ unsigned int reply_payload_rcv_len)
{
struct request *req = job->req;
struct request *rsp = req->next_rq;
int err;
- err = job->req->errors = job->reply->result;
+ err = job->req->errors = result;
if (err < 0)
/* we're only returning the result field in the reply */
req->resid_len = 0;
if (rsp) {
- WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
+ WARN_ON(reply_payload_rcv_len > rsp->resid_len);
/* set reply (bidi) residual */
- rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
- rsp->resid_len);
+ rsp->resid_len -= min(reply_payload_rcv_len, rsp->resid_len);
}
blk_complete_request(req);
}
+EXPORT_SYMBOL_GPL(fc_bsg_jobdone);
/**
* fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
static void fc_bsg_softirq_done(struct request *rq)
{
struct fc_bsg_job *job = rq->special;
- unsigned long flags;
-
- spin_lock_irqsave(&job->job_lock, flags);
- job->state_flags |= FC_RQST_STATE_DONE;
- job->ref_cnt--;
- spin_unlock_irqrestore(&job->job_lock, flags);
- blk_end_request_all(rq, rq->errors);
- fc_destroy_bsgjob(job);
+ kref_put(&job->kref, fc_destroy_bsgjob);
}
/**
fc_bsg_job_timeout(struct request *req)
{
struct fc_bsg_job *job = (void *) req->special;
- struct Scsi_Host *shost = job->shost;
+ struct Scsi_Host *shost = fc_bsg_to_shost(job);
+ struct fc_rport *rport = fc_bsg_to_rport(job);
struct fc_internal *i = to_fc_internal(shost->transportt);
- unsigned long flags;
- int err = 0, done = 0;
+ int err = 0, inflight = 0;
- if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
+ if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
return BLK_EH_RESET_TIMER;
- spin_lock_irqsave(&job->job_lock, flags);
- if (job->state_flags & FC_RQST_STATE_DONE)
- done = 1;
- else
- job->ref_cnt++;
- spin_unlock_irqrestore(&job->job_lock, flags);
+ inflight = kref_get_unless_zero(&job->kref);
- if (!done && i->f->bsg_timeout) {
+ if (inflight && i->f->bsg_timeout) {
/* call LLDD to abort the i/o as it has timed out */
err = i->f->bsg_timeout(job);
if (err == -EAGAIN) {
- job->ref_cnt--;
+ kref_put(&job->kref, fc_destroy_bsgjob);
return BLK_EH_RESET_TIMER;
} else if (err)
printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
}
/* the blk_end_sync_io() doesn't check the error */
- if (done)
+ if (!inflight)
return BLK_EH_NOT_HANDLED;
else
return BLK_EH_HANDLED;
}
static int
-fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
+fc_bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
{
size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
job->req = req;
if (i->f->dd_bsg_size)
job->dd_data = (void *)&job[1];
- spin_lock_init(&job->job_lock);
job->request = (struct fc_bsg_request *)req->cmd;
job->request_len = req->cmd_len;
job->reply = req->sense;
if (ret)
goto failjob_rls_rqst_payload;
}
- job->job_done = fc_bsg_jobdone;
if (rport)
job->dev = &rport->dev;
else
job->dev = &shost->shost_gendev;
get_device(job->dev); /* take a reference for the request */
- job->ref_cnt = 1;
+ kref_init(&job->kref);
return 0;
struct fc_bsg_job *job)
{
struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_bsg_request *bsg_request = job->request;
+ struct fc_bsg_reply *bsg_reply = job->reply;
int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
int ret;
+ /* check if we really have all the request data needed */
+ if (job->request_len < cmdlen) {
+ ret = -ENOMSG;
+ goto fail_host_msg;
+ }
+
/* Validate the host command */
- switch (job->request->msgcode) {
+ switch (bsg_request->msgcode) {
case FC_BSG_HST_ADD_RPORT:
cmdlen += sizeof(struct fc_bsg_host_add_rport);
break;
case FC_BSG_HST_VENDOR:
cmdlen += sizeof(struct fc_bsg_host_vendor);
if ((shost->hostt->vendor_id == 0L) ||
- (job->request->rqst_data.h_vendor.vendor_id !=
+ (bsg_request->rqst_data.h_vendor.vendor_id !=
shost->hostt->vendor_id)) {
ret = -ESRCH;
goto fail_host_msg;
goto fail_host_msg;
}
- /* check if we really have all the request data needed */
- if (job->request_len < cmdlen) {
- ret = -ENOMSG;
- goto fail_host_msg;
- }
-
ret = i->f->bsg_request(job);
if (!ret)
return FC_DISPATCH_UNLOCKED;
fail_host_msg:
/* return the errno failure code as the only status */
BUG_ON(job->reply_len < sizeof(uint32_t));
- job->reply->reply_payload_rcv_len = 0;
- job->reply->result = ret;
+ bsg_reply->reply_payload_rcv_len = 0;
+ bsg_reply->result = ret;
job->reply_len = sizeof(uint32_t);
- fc_bsg_jobdone(job);
+ fc_bsg_jobdone(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
return FC_DISPATCH_UNLOCKED;
}
static void
fc_bsg_goose_queue(struct fc_rport *rport)
{
- if (!rport->rqst_q)
+ struct request_queue *q = rport->rqst_q;
+ unsigned long flags;
+
+ if (!q)
return;
- /*
- * This get/put dance makes no sense
- */
- get_device(&rport->dev);
- blk_run_queue_async(rport->rqst_q);
- put_device(&rport->dev);
+ spin_lock_irqsave(q->queue_lock, flags);
+ blk_run_queue_async(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
/**
struct fc_rport *rport, struct fc_bsg_job *job)
{
struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_bsg_request *bsg_request = job->request;
+ struct fc_bsg_reply *bsg_reply = job->reply;
int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
int ret;
+ /* check if we really have all the request data needed */
+ if (job->request_len < cmdlen) {
+ ret = -ENOMSG;
+ goto fail_rport_msg;
+ }
+
/* Validate the rport command */
- switch (job->request->msgcode) {
+ switch (bsg_request->msgcode) {
case FC_BSG_RPT_ELS:
cmdlen += sizeof(struct fc_bsg_rport_els);
goto check_bidi;
goto fail_rport_msg;
}
- /* check if we really have all the request data needed */
- if (job->request_len < cmdlen) {
- ret = -ENOMSG;
- goto fail_rport_msg;
- }
-
ret = i->f->bsg_request(job);
if (!ret)
return FC_DISPATCH_UNLOCKED;
fail_rport_msg:
/* return the errno failure code as the only status */
BUG_ON(job->reply_len < sizeof(uint32_t));
- job->reply->reply_payload_rcv_len = 0;
- job->reply->result = ret;
+ bsg_reply->reply_payload_rcv_len = 0;
+ bsg_reply->result = ret;
job->reply_len = sizeof(uint32_t);
- fc_bsg_jobdone(job);
+ fc_bsg_jobdone(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
return FC_DISPATCH_UNLOCKED;
}
struct request *req;
struct fc_bsg_job *job;
enum fc_dispatch_result ret;
+ struct fc_bsg_reply *bsg_reply;
if (!get_device(dev))
return;
/* check if we have the msgcode value at least */
if (job->request_len < sizeof(uint32_t)) {
BUG_ON(job->reply_len < sizeof(uint32_t));
- job->reply->reply_payload_rcv_len = 0;
- job->reply->result = -ENOMSG;
+ bsg_reply = job->reply;
+ bsg_reply->reply_payload_rcv_len = 0;
+ bsg_reply->result = -ENOMSG;
job->reply_len = sizeof(uint32_t);
- fc_bsg_jobdone(job);
+ fc_bsg_jobdone(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
spin_lock_irq(q->queue_lock);
continue;
}
projects / mirror_ubuntu-zesty-kernel.git / blobdiff