IB/iser: Count FMR alignment violations per session

Count FMR alignment violations per session as part of the iscsi
statistics.

Signed-off-by: Eli Dorfman <elid@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index be1b9fb..aeb58ca 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -473,13 +473,15 @@ iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *s
        stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */
        stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
        stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
-       stats->custom_length = 3;
+       stats->custom_length = 4;
        strcpy(stats->custom[0].desc, "qp_tx_queue_full");
        stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */
        strcpy(stats->custom[1].desc, "fmr_map_not_avail");
        stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */;
        strcpy(stats->custom[2].desc, "eh_abort_cnt");
        stats->custom[2].value = conn->eh_abort_cnt;
+       strcpy(stats->custom[3].desc, "fmr_unalign_cnt");
+       stats->custom[3].value = conn->fmr_unalign_cnt;
 }
 
 static int

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index ee58199..cac50c4 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -423,6 +423,7 @@ void iser_dma_unmap_task_data(struct iscsi_iser_cmd_task *iser_ctask)
 int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *iser_ctask,
                      enum   iser_data_dir        cmd_dir)
 {
+       struct iscsi_conn    *iscsi_conn = iser_ctask->iser_conn->iscsi_conn;
        struct iser_conn     *ib_conn = iser_ctask->iser_conn->ib_conn;
        struct iser_device   *device = ib_conn->device;
        struct ib_device     *ibdev = device->ib_device;
@@ -437,6 +438,7 @@ int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *iser_ctask,
 
        aligned_len = iser_data_buf_aligned_len(mem, ibdev);
        if (aligned_len != mem->dma_nents) {
+               iscsi_conn->fmr_unalign_cnt++;
                iser_warn("rdma alignment violation %d/%d aligned\n",
                         aligned_len, mem->size);
                iser_data_buf_dump(mem, ibdev);

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 7b90b63..cd3ca63 100644 (file)
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -225,6 +225,7 @@ struct iscsi_conn {
 
        /* custom statistics */
        uint32_t                eh_abort_cnt;
+       uint32_t                fmr_unalign_cnt;
 };
 
 struct iscsi_pool {