nvme-cli/fabrics: Add nr_io_queues parameter to connect command

Added 'nr-io-queues' to 'connect' command so users can specify the number
of io queues to allocate.

usage examples:

nvme connect --transport=rdma --nr-io-queues=8 --trsvcid=4420 --traddr=10.0.1.14 --nqn=test-nvme
nvme connect -t rdma -i 8 -s 4420 -a 10.0.1.14 -n test-nvme

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Jay Freyensee <james_p_freyensee@linux.intel.com>

diff --git a/fabrics.c b/fabrics.c
index 942e987b0de96ab6933314c26a057074bc60409a..18e961cedefb6ec21c4e481f6055215313d9015e 100644 (file)
--- a/fabrics.c
+++ b/fabrics.c
@@ -50,6 +50,7 @@ struct config {
        char *traddr;
        char *trsvcid;
        char *hostnqn;
+       char *nr_io_queues;
        char *raw;
        char *device;
 } cfg = { 0 };
@@ -481,6 +482,14 @@ static int build_options(char *argstr, int max_len)
                max_len -= len;
        }
 
+       if (cfg.nr_io_queues) {
+               len = snprintf(argstr, max_len, ",nr_io_queues=%s", cfg.nr_io_queues);
+               if (len < 0)
+                       return -EINVAL;
+               argstr += len;
+               max_len -= len;
+       }
+
        return 0;
 }
 
@@ -713,6 +722,8 @@ int connect(const char *desc, int argc, char **argv)
                        "transport service id (e.g. IP port)" },
                {"hostnqn", 'q', "LIST", CFG_STRING, &cfg.hostnqn, required_argument,
                        "user-defined hostnqn" },
+               {"nr-io-queues", 'i', "LIST", CFG_STRING, &cfg.nr_io_queues, required_argument,
+                       "number of io queues to use (default is core count)" },
                {0},
        };