diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h index 0c175590cf92..cbdcc81e1df8 100644 --- a/drivers/infiniband/core/core_priv.h +++ b/drivers/infiniband/core/core_priv.h @@ -309,4 +309,9 @@ static inline int ib_mad_enforce_security(struct ib_mad_agent_private *map, return 0; } #endif + +struct ib_device *__ib_device_get_by_index(u32 ifindex); +/* RDMA device netlink */ +void nldev_init(void); +void nldev_exit(void); #endif /* _CORE_PRIV_H */ diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index 8828f26250a8..deae8b940994 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -134,6 +134,17 @@ static int ib_device_check_mandatory(struct ib_device *device) return 0; } +struct ib_device *__ib_device_get_by_index(u32 index) +{ + struct ib_device *device; + + list_for_each_entry(device, &device_list, core_list) + if (device->index == index) + return device; + + return NULL; +} + static struct ib_device *__ib_device_get_by_name(const char *name) { struct ib_device *device; @@ -145,7 +156,6 @@ static struct ib_device *__ib_device_get_by_name(const char *name) return NULL; } - static int alloc_name(char *name) { unsigned long *inuse; @@ -394,6 +404,30 @@ static int ib_security_change(struct notifier_block *nb, unsigned long event, return NOTIFY_OK; } +/** + * __dev_new_index - allocate an device index + * + * Returns a suitable unique value for a new device interface + * number. It assumes that there are less than 2^32-1 ib devices + * will be present in the system. + */ +static u32 __dev_new_index(void) +{ + /* + * The device index to allow stable naming. + * Similar to struct net -> ifindex. + */ + static u32 index; + + for (;;) { + if (!(++index)) + index = 1; + + if (!__ib_device_get_by_index(index)) + return index; + } +} + /** * ib_register_device - Register an IB device with IB core * @device:Device to register @@ -492,6 +526,7 @@ int ib_register_device(struct ib_device *device, if (client->add && !add_client_context(device, client)) client->add(device); + device->index = __dev_new_index(); down_write(&lists_rwsem); list_add_tail(&device->core_list, &device_list); up_write(&lists_rwsem); diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 1082b4c81b2c..3391df5fdc9c 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2298,6 +2298,8 @@ struct ib_device { struct rdmacg_device cg_device; #endif + u32 index; + /** * The following mandatory functions are used only at device * registration. Keep functions such as these at the end of this