nvmet: expose support for fabrics SQ flow control disable in treq

Technical Proposal introduces an indication for SQ flow control
disable support. Expose it since we are able to operate in this mode.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 260a401db01ca1cba030e4e4f925ad2c007cb9fa..db2cb64be7ba3bb7d70ee38675bd0a4a1f5782aa 100644 (file)
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -1214,6 +1214,7 @@ static struct config_group *nvmet_ports_make(struct config_group *group,
        port->inline_data_size = -1;    /* < 0 == let the transport choose */
 
        port->disc_addr.portid = cpu_to_le16(portid);
+       port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW;
        config_group_init_type_name(&port->group, name, &nvmet_port_type);
 
        config_group_init_type_name(&port->subsys_group,

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 4fc48071e5eaa6d9cff84f847be0b6c6286e6334..c03973c215ad208037219068f7562fdf24b424e6 100644 (file)
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -58,11 +58,13 @@ enum {
 
 /* Transport Requirements codes for Discovery Log Page entry TREQ field */
 enum {
-       NVMF_TREQ_NOT_SPECIFIED = 0,    /* Not specified */
-       NVMF_TREQ_REQUIRED      = 1,    /* Required */
-       NVMF_TREQ_NOT_REQUIRED  = 2,    /* Not Required */
+       NVMF_TREQ_NOT_SPECIFIED = 0,            /* Not specified */
+       NVMF_TREQ_REQUIRED      = 1,            /* Required */
+       NVMF_TREQ_NOT_REQUIRED  = 2,            /* Not Required */
 #define NVME_TREQ_SECURE_CHANNEL_MASK \
        (NVMF_TREQ_REQUIRED | NVMF_TREQ_NOT_REQUIRED)
+
+       NVMF_TREQ_DISABLE_SQFLOW = (1 << 2),    /* Supports SQ flow control disable */
 };
 
 /* RDMA QP Service Type codes for Discovery Log Page entry TSAS