static int nsim_bus_dev_vfs_enable(struct nsim_bus_dev *nsim_bus_dev,
unsigned int num_vfs)
{
- nsim_bus_dev->vfconfigs = kcalloc(num_vfs,
- sizeof(struct nsim_vf_config),
- GFP_KERNEL | __GFP_NOWARN);
+ if (nsim_bus_dev->max_vfs < num_vfs)
+ return -ENOMEM;
+
if (!nsim_bus_dev->vfconfigs)
return -ENOMEM;
nsim_bus_dev->num_vfs = num_vfs;
static void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev)
{
- kfree(nsim_bus_dev->vfconfigs);
- nsim_bus_dev->vfconfigs = NULL;
nsim_bus_dev->num_vfs = 0;
}
if (ret)
return ret;
- rtnl_lock();
+ mutex_lock(&nsim_bus_dev->vfs_lock);
if (nsim_bus_dev->num_vfs == num_vfs)
goto exit_good;
if (nsim_bus_dev->num_vfs && num_vfs) {
exit_good:
ret = count;
exit_unlock:
- rtnl_unlock();
+ mutex_unlock(&nsim_bus_dev->vfs_lock);
return ret;
}
__ATTR(sriov_numvfs, 0664, nsim_bus_dev_numvfs_show,
nsim_bus_dev_numvfs_store);
+ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
+ char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct nsim_bus_dev *nsim_bus_dev = file->private_data;
+ char buf[11];
+ size_t len;
+
+ len = snprintf(buf, sizeof(buf), "%u\n", nsim_bus_dev->max_vfs);
+ if (len < 0)
+ return len;
+
+ return simple_read_from_buffer(data, count, ppos, buf, len);
+}
+
+ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct nsim_bus_dev *nsim_bus_dev = file->private_data;
+ struct nsim_vf_config *vfconfigs;
+ ssize_t ret;
+ char buf[10];
+ u32 val;
+
+ if (*ppos != 0)
+ return 0;
+
+ if (count >= sizeof(buf))
+ return -ENOSPC;
+
+ mutex_lock(&nsim_bus_dev->vfs_lock);
+ /* Reject if VFs are configured */
+ if (nsim_bus_dev->num_vfs) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = copy_from_user(buf, data, count);
+ if (ret) {
+ ret = -EFAULT;
+ goto unlock;
+ }
+
+ buf[count] = '\0';
+ ret = kstrtouint(buf, 10, &val);
+ if (ret) {
+ ret = -EIO;
+ goto unlock;
+ }
+
+ vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), GFP_KERNEL | __GFP_NOWARN);
+ if (!vfconfigs) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ kfree(nsim_bus_dev->vfconfigs);
+ nsim_bus_dev->vfconfigs = vfconfigs;
+ nsim_bus_dev->max_vfs = val;
+ *ppos += count;
+ ret = count;
+unlock:
+ mutex_unlock(&nsim_bus_dev->vfs_lock);
+ return ret;
+}
+
static ssize_t
new_port_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
.num_vf = nsim_num_vf,
};
+#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->dev.type = &nsim_bus_dev_type;
nsim_bus_dev->port_count = port_count;
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);
+ mutex_init(&nsim_bus_dev->vfs_lock);
/* Disallow using nsim_bus_dev */
smp_store_release(&nsim_bus_dev->init, false);
+ nsim_bus_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
+ sizeof(struct nsim_vf_config),
+ GFP_KERNEL | __GFP_NOWARN);
+ if (!nsim_bus_dev->vfconfigs) {
+ err = -ENOMEM;
+ goto err_nsim_bus_dev_id_free;
+ }
+
err = device_register(&nsim_bus_dev->dev);
if (err)
- goto err_nsim_bus_dev_id_free;
+ goto err_nsim_vfs_free;
+
return nsim_bus_dev;
+err_nsim_vfs_free:
+ kfree(nsim_bus_dev->vfconfigs);
err_nsim_bus_dev_id_free:
ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
err_nsim_bus_dev_free:
smp_store_release(&nsim_bus_dev->init, false);
device_unregister(&nsim_bus_dev->dev);
ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
+ kfree(nsim_bus_dev->vfconfigs);
kfree(nsim_bus_dev);
}
struct dentry *ddir;
struct dentry *ports_ddir;
struct dentry *take_snapshot;
+ struct dentry *max_vfs;
struct bpf_offload_dev *bpf_dev;
bool bpf_bind_accept;
bool bpf_bind_verifier_accept;
u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
enum nsim_resource_id res_id, bool max);
+ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
+ char __user *data,
+ size_t count, loff_t *ppos);
+ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos);
+
#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
void nsim_ipsec_init(struct netdevsim *ns);
void nsim_ipsec_teardown(struct netdevsim *ns);
struct net *initial_net; /* Purpose of this is to carry net pointer
* during the probe time only.
*/
+ unsigned int max_vfs;
unsigned int num_vfs;
+ struct mutex vfs_lock; /* Protects vfconfigs */
struct nsim_vf_config *vfconfigs;
/* Lock for devlink->reload_enabled in netdevsim module */
struct mutex nsim_bus_reload_lock;