diff options
| author | Peilin Ye <peilin.ye@bytedance.com> | 2021-07-15 18:52:45 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-16 11:17:56 -0700 |
| commit | d4861fc6be581561d6964700110a4dede54da6a6 (patch) | |
| tree | 3f41458f5188057c4dfec1ce51655a2527aadb94 /drivers/net/netdevsim/bus.c | |
| parent | b83d23a2a38b1770da0491257ae81d52307f7816 (diff) | |
netdevsim: Add multi-queue support
Currently netdevsim only supports a single queue per port, which is
insufficient for testing multi-queue TC schedulers e.g. sch_mq. Extend
the current sysfs interface so that users can create ports with multiple
queues:
$ echo "[ID] [PORT_COUNT] [NUM_QUEUES]" > /sys/bus/netdevsim/new_device
As an example, echoing "2 4 8" creates 4 ports, with 8 queues per port.
Note, this is compatible with the current interface, with default number
of queues set to 1. For example, echoing "2 4" creates 4 ports with 1
queue per port; echoing "2" simply creates 1 port with 1 queue.
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim/bus.c')
| -rw-r--r-- | drivers/net/netdevsim/bus.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c index ccec29970d5b..ff01e5bdc72e 100644 --- a/drivers/net/netdevsim/bus.c +++ b/drivers/net/netdevsim/bus.c @@ -262,29 +262,31 @@ static struct device_type nsim_bus_dev_type = { }; static struct nsim_bus_dev * -nsim_bus_dev_new(unsigned int id, unsigned int port_count); +nsim_bus_dev_new(unsigned int id, unsigned int port_count, unsigned int num_queues); static ssize_t new_device_store(struct bus_type *bus, const char *buf, size_t count) { + unsigned int id, port_count, num_queues; struct nsim_bus_dev *nsim_bus_dev; - unsigned int port_count; - unsigned int id; int err; - err = sscanf(buf, "%u %u", &id, &port_count); + err = sscanf(buf, "%u %u %u", &id, &port_count, &num_queues); switch (err) { case 1: port_count = 1; fallthrough; case 2: + num_queues = 1; + fallthrough; + case 3: if (id > INT_MAX) { pr_err("Value of \"id\" is too big.\n"); return -EINVAL; } break; default: - pr_err("Format for adding new device is \"id port_count\" (uint uint).\n"); + pr_err("Format for adding new device is \"id port_count num_queues\" (uint uint unit).\n"); return -EINVAL; } @@ -295,7 +297,7 @@ new_device_store(struct bus_type *bus, const char *buf, size_t count) goto err; } - nsim_bus_dev = nsim_bus_dev_new(id, port_count); + nsim_bus_dev = nsim_bus_dev_new(id, port_count, num_queues); if (IS_ERR(nsim_bus_dev)) { err = PTR_ERR(nsim_bus_dev); goto err; @@ -397,7 +399,7 @@ static struct bus_type nsim_bus = { #define NSIM_BUS_DEV_MAX_VFS 4 static struct nsim_bus_dev * -nsim_bus_dev_new(unsigned int id, unsigned int port_count) +nsim_bus_dev_new(unsigned int id, unsigned int port_count, unsigned int num_queues) { struct nsim_bus_dev *nsim_bus_dev; int err; @@ -413,6 +415,7 @@ nsim_bus_dev_new(unsigned int id, unsigned int port_count) nsim_bus_dev->dev.bus = &nsim_bus; nsim_bus_dev->dev.type = &nsim_bus_dev_type; nsim_bus_dev->port_count = port_count; + nsim_bus_dev->num_queues = num_queues; nsim_bus_dev->initial_net = current->nsproxy->net_ns; nsim_bus_dev->max_vfs = NSIM_BUS_DEV_MAX_VFS; mutex_init(&nsim_bus_dev->nsim_bus_reload_lock); |