nvme-fc: Ensure private pointers are NULL if no data

Ensure that when allocations are done, and the lldd options indicate
no private data is needed, that private pointers will be set to NULL
(catches driver error that forgot to set private data size).

Slightly reorg the allocations so that private data follows allocations
for LS request/response buffers. Ensures better alignments for the buffers
as well as the private pointer.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 83f9b2ac7c558166bd9a395f3ae072ea19240a89..bf80b941d739f31f11083b8cac71999df1a457c0 100644 (file)
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -395,7 +395,10 @@ nvme_fc_register_localport(struct nvme_fc_port_info *pinfo,
        newrec->ops = template;
        newrec->dev = dev;
        ida_init(&newrec->endp_cnt);
-       newrec->localport.private = &newrec[1];
+       if (template->local_priv_sz)
+               newrec->localport.private = &newrec[1];
+       else
+               newrec->localport.private = NULL;
        newrec->localport.node_name = pinfo->node_name;
        newrec->localport.port_name = pinfo->port_name;
        newrec->localport.port_role = pinfo->port_role;
@@ -704,7 +707,10 @@ nvme_fc_register_remoteport(struct nvme_fc_local_port *localport,
        newrec->remoteport.localport = &lport->localport;
        newrec->dev = lport->dev;
        newrec->lport = lport;
-       newrec->remoteport.private = &newrec[1];
+       if (lport->ops->remote_priv_sz)
+               newrec->remoteport.private = &newrec[1];
+       else
+               newrec->remoteport.private = NULL;
        newrec->remoteport.port_role = pinfo->port_role;
        newrec->remoteport.node_name = pinfo->node_name;
        newrec->remoteport.port_name = pinfo->port_name;
@@ -1152,18 +1158,23 @@ nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl,
        int ret, fcret = 0;
 
        lsop = kzalloc((sizeof(*lsop) +
-                        ctrl->lport->ops->lsrqst_priv_sz +
-                        sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL);
+                        sizeof(*assoc_rqst) + sizeof(*assoc_acc) +
+                        ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL);
        if (!lsop) {
+               dev_info(ctrl->ctrl.device,
+                       "NVME-FC{%d}: send Create Association failed: ENOMEM\n",
+                       ctrl->cnum);
                ret = -ENOMEM;
                goto out_no_memory;
        }
-       lsreq = &lsop->ls_req;
 
-       lsreq->private = (void *)&lsop[1];
-       assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *)
-                       (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz);
+       assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *)&lsop[1];
        assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1];
+       lsreq = &lsop->ls_req;
+       if (ctrl->lport->ops->lsrqst_priv_sz)
+               lsreq->private = &assoc_acc[1];
+       else
+               lsreq->private = NULL;
 
        assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION;
        assoc_rqst->desc_list_len =
@@ -1261,18 +1272,23 @@ nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
        int ret, fcret = 0;
 
        lsop = kzalloc((sizeof(*lsop) +
-                        ctrl->lport->ops->lsrqst_priv_sz +
-                        sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL);
+                        sizeof(*conn_rqst) + sizeof(*conn_acc) +
+                        ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL);
        if (!lsop) {
+               dev_info(ctrl->ctrl.device,
+                       "NVME-FC{%d}: send Create Connection failed: ENOMEM\n",
+                       ctrl->cnum);
                ret = -ENOMEM;
                goto out_no_memory;
        }
-       lsreq = &lsop->ls_req;
 
-       lsreq->private = (void *)&lsop[1];
-       conn_rqst = (struct fcnvme_ls_cr_conn_rqst *)
-                       (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz);
+       conn_rqst = (struct fcnvme_ls_cr_conn_rqst *)&lsop[1];
        conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1];
+       lsreq = &lsop->ls_req;
+       if (ctrl->lport->ops->lsrqst_priv_sz)
+               lsreq->private = (void *)&conn_acc[1];
+       else
+               lsreq->private = NULL;
 
        conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION;
        conn_rqst->desc_list_len = cpu_to_be32(
@@ -1386,19 +1402,23 @@ nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl)
        int ret;
 
        lsop = kzalloc((sizeof(*lsop) +
-                        ctrl->lport->ops->lsrqst_priv_sz +
-                        sizeof(*discon_rqst) + sizeof(*discon_acc)),
-                       GFP_KERNEL);
-       if (!lsop)
-               /* couldn't sent it... too bad */
+                       sizeof(*discon_rqst) + sizeof(*discon_acc) +
+                       ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL);
+       if (!lsop) {
+               dev_info(ctrl->ctrl.device,
+                       "NVME-FC{%d}: send Disconnect Association "
+                       "failed: ENOMEM\n",
+                       ctrl->cnum);
                return;
+       }
 
-       lsreq = &lsop->ls_req;
-
-       lsreq->private = (void *)&lsop[1];
-       discon_rqst = (struct fcnvme_ls_disconnect_assoc_rqst *)
-                       (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz);
+       discon_rqst = (struct fcnvme_ls_disconnect_assoc_rqst *)&lsop[1];
        discon_acc = (struct fcnvme_ls_disconnect_assoc_acc *)&discon_rqst[1];
+       lsreq = &lsop->ls_req;
+       if (ctrl->lport->ops->lsrqst_priv_sz)
+               lsreq->private = (void *)&discon_acc[1];
+       else
+               lsreq->private = NULL;
 
        discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT_ASSOC;
        discon_rqst->desc_list_len = cpu_to_be32(
@@ -1784,15 +1804,17 @@ nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl)
        struct nvme_fc_fcp_op *aen_op;
        struct nvme_fc_cmd_iu *cmdiu;
        struct nvme_command *sqe;
-       void *private;
+       void *private = NULL;
        int i, ret;
 
        aen_op = ctrl->aen_ops;
        for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) {
-               private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz,
+               if (ctrl->lport->ops->fcprqst_priv_sz) {
+                       private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz,
                                                GFP_KERNEL);
-               if (!private)
-                       return -ENOMEM;
+                       if (!private)
+                               return -ENOMEM;
+               }
 
                cmdiu = &aen_op->cmd_iu;
                sqe = &cmdiu->sqe;
@@ -1823,9 +1845,6 @@ nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl)
 
        aen_op = ctrl->aen_ops;
        for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) {
-               if (!aen_op->fcp_req.private)
-                       continue;
-
                __nvme_fc_exit_request(ctrl, aen_op);
 
                kfree(aen_op->fcp_req.private);

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 66de6bd8f4fd4352111566627280149ffa3c27c2..66a60a21899463cf0cab778914ea649e4ce3a86b 100644 (file)
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1047,7 +1047,10 @@ nvmet_fc_register_targetport(struct nvmet_fc_port_info *pinfo,
 
        newrec->fc_target_port.node_name = pinfo->node_name;
        newrec->fc_target_port.port_name = pinfo->port_name;
-       newrec->fc_target_port.private = &newrec[1];
+       if (template->target_priv_sz)
+               newrec->fc_target_port.private = &newrec[1];
+       else
+               newrec->fc_target_port.private = NULL;
        newrec->fc_target_port.port_id = pinfo->port_id;
        newrec->fc_target_port.port_num = idx;
        INIT_LIST_HEAD(&newrec->tgt_list);