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nvmet_fc: add req_release to lldd api

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With the advent of the opdone calls changing context, the lldd can no
longer assume that once the op->done call returns for RSP operations
that the request struct is no longer being accessed.

As such, revise the lldd api for a req_release callback that the
transport will call when the job is complete. This will also be used
with abort cases.

Fixed text in api header for change in io complete semantics.

Revised lpfc to support the new req_release api.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
James Smart
2017-04-11 11:32:29 -07:00
committed by Christoph Hellwig
parent 39498faef7
commit 19b58d9473
5 changed files with 125 additions and 37 deletions
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15
drivers/nvme/target/fcloop.c
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@@ -492,14 +492,18 @@ fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
tgt_fcpreq->fcp_error = fcp_err;
tgt_fcpreq->done(tgt_fcpreq);
if ((!fcp_err) && (op == NVMET_FCOP_RSP ||
op == NVMET_FCOP_READDATA_RSP ||
op == NVMET_FCOP_ABORT))
schedule_work(&tfcp_req->work);
return 0;
}
static void
fcloop_fcp_req_release(struct nvmet_fc_target_port *tgtport,
struct nvmefc_tgt_fcp_req *tgt_fcpreq)
{
struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
schedule_work(&tfcp_req->work);
}
static void
fcloop_ls_abort(struct nvme_fc_local_port *localport,
struct nvme_fc_remote_port *remoteport,
@@ -570,6 +574,7 @@ struct nvmet_fc_target_template tgttemplate = {
.targetport_delete = fcloop_targetport_delete,
.xmt_ls_rsp = fcloop_xmt_ls_rsp,
.fcp_op = fcloop_fcp_op,
.fcp_req_release = fcloop_fcp_req_release,
.max_hw_queues = FCLOOP_HW_QUEUES,
.max_sgl_segments = FCLOOP_SGL_SEGS,
.max_dif_sgl_segments = FCLOOP_SGL_SEGS,