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netdevsim: Add max_vfs to bus_dev

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Currently there is no limit to the number of VFs netdevsim can enable.
In a real systems this value exist and used by the driver.
Fore example, some features might need to consider this value when
allocating memory.

Expose max_vfs variable to debugfs as configurable resource. If are VFs
configured (num_vfs != 0) then changing of max_vfs not allowed.

Co-developed-by: Yuval Avnery <yuvalav@nvidia.com>
Signed-off-by: Yuval Avnery <yuvalav@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmytro Linkin
2021-06-02 15:17:14 +03:00
committed by David S. Miller
parent 53c7bb5530
commit d395381909
3 changed files with 112 additions and 8 deletions
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13
drivers/net/netdevsim/dev.c
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@@ -192,6 +192,14 @@ static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
.owner = THIS_MODULE,
};
static const struct file_operations nsim_dev_max_vfs_fops = {
.open = simple_open,
.read = nsim_bus_dev_max_vfs_read,
.write = nsim_bus_dev_max_vfs_write,
.llseek = generic_file_llseek,
.owner = THIS_MODULE,
};
static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
{
char dev_ddir_name[sizeof(DRV_NAME) + 10];
@@ -231,6 +239,11 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
debugfs_create_bool("fail_trap_policer_counter_get", 0600,
nsim_dev->ddir,
&nsim_dev->fail_trap_policer_counter_get);
nsim_dev->max_vfs = debugfs_create_file("max_vfs",
0600,
nsim_dev->ddir,
nsim_dev->nsim_bus_dev,
&nsim_dev_max_vfs_fops);
nsim_udp_tunnels_debugfs_create(nsim_dev);
return 0;
}