[PATCH V3 3/5] nvme: Introduce nvme_is_fabrics to check fabrics cmd

Minwoo Im
2019-05-12T07:34:56Z

This patch introduce a nvme_is_fabrics() inline function to check
whether or not the given command structure is for fabrics.

Cc: Keith Busch <keith.busch@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
---
drivers/nvme/host/fabrics.c | 2 +-
drivers/nvme/target/core.c | 2 +-
drivers/nvme/target/fabrics-cmd.c | 2 +-
drivers/nvme/target/fc.c | 2 +-
include/linux/nvme.h | 7 ++++++-
5 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 592d1e61ef7e..931995f2dbc3 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -578,7 +578,7 @@ bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
switch (ctrl->state) {
case NVME_CTRL_NEW:
case NVME_CTRL_CONNECTING:
- if (req->cmd->common.opcode == nvme_fabrics_command &&
+ if (nvme_is_fabrics(req->cmd) &&
req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
return true;
break;
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 7734a6acff85..da2ea97042af 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -871,7 +871,7 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
status = nvmet_parse_connect_cmd(req);
else if (likely(req->sq->qid != 0))
status = nvmet_parse_io_cmd(req);
- else if (req->cmd->common.opcode == nvme_fabrics_command)
+ else if (nvme_is_fabrics(req->cmd))
status = nvmet_parse_fabrics_cmd(req);
else if (req->sq->ctrl->subsys->type == NVME_NQN_DISC)
status = nvmet_parse_discovery_cmd(req);
diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index 3b9f79aba98f..d16b55ffe79f 100644
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -268,7 +268,7 @@ u16 nvmet_parse_connect_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;

- if (cmd->common.opcode != nvme_fabrics_command) {
+ if (!nvme_is_fabrics(cmd)) {
pr_err("invalid command 0x%x on unconnected queue.\n",
cmd->fabrics.opcode);
req->error_loc = offsetof(struct nvme_common_command, opcode);
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 508661af0f50..a59c5a013a5c 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1806,7 +1806,7 @@ nvmet_fc_prep_fcp_rsp(struct nvmet_fc_tgtport *tgtport,
*/
rspcnt = atomic_inc_return(&fod->queue->zrspcnt);
if (!(rspcnt % fod->queue->ersp_ratio) ||
- sqe->opcode == nvme_fabrics_command ||
+ nvme_is_fabrics((struct nvme_command *) sqe) ||
xfr_length != fod->req.transfer_len ||
(le16_to_cpu(cqe->status) & 0xFFFE) || cqewd[0] || cqewd[1] ||
(sqe->flags & (NVME_CMD_FUSE_FIRST | NVME_CMD_FUSE_SECOND)) ||
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index c40720cb59ac..ab5e9392b42d 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1165,6 +1165,11 @@ struct nvme_command {
};
};

+static inline bool nvme_is_fabrics(struct nvme_command *cmd)
+{
+ return cmd->common.opcode == nvme_fabrics_command;
+}
+
struct nvme_error_slot {
__le64 error_count;
__le16 sqid;
@@ -1186,7 +1191,7 @@ static inline bool nvme_is_write(struct nvme_command *cmd)
*
* Why can't we simply have a Fabrics In and Fabrics out command?
*/
- if (unlikely(cmd->common.opcode == nvme_fabrics_command))
+ if (unlikely(nvme_is_fabrics(cmd)))
return cmd->fabrics.fctype & 1;
return cmd->common.opcode & 1;
}
--
2.17.1