diff options
| -rw-r--r-- | drivers/infiniband/core/cache.c | 66 | ||||
| -rw-r--r-- | include/rdma/ib_cache.h | 3 | ||||
| -rw-r--r-- | include/uapi/rdma/ib_user_ioctl_verbs.h | 8 |
3 files changed, 74 insertions, 3 deletions
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index cf49ac0b0aa6..3a86a10c9572 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -1248,6 +1248,67 @@ done: EXPORT_SYMBOL(rdma_get_gid_attr); /** + * rdma_query_gid_table - Reads GID table entries of all the ports of a device up to max_entries. + * @device: The device to query. + * @entries: Entries where GID entries are returned. + * @max_entries: Maximum number of entries that can be returned. + * Entries array must be allocated to hold max_entries number of entries. + * @num_entries: Updated to the number of entries that were successfully read. + * + * Returns number of entries on success or appropriate error code. + */ +ssize_t rdma_query_gid_table(struct ib_device *device, + struct ib_uverbs_gid_entry *entries, + size_t max_entries) +{ + const struct ib_gid_attr *gid_attr; + ssize_t num_entries = 0, ret; + struct ib_gid_table *table; + unsigned int port_num, i; + struct net_device *ndev; + unsigned long flags; + + rdma_for_each_port(device, port_num) { + if (!rdma_ib_or_roce(device, port_num)) + continue; + + table = rdma_gid_table(device, port_num); + read_lock_irqsave(&table->rwlock, flags); + for (i = 0; i < table->sz; i++) { + if (!is_gid_entry_valid(table->data_vec[i])) + continue; + if (num_entries >= max_entries) { + ret = -EINVAL; + goto err; + } + + gid_attr = &table->data_vec[i]->attr; + + memcpy(&entries->gid, &gid_attr->gid, + sizeof(gid_attr->gid)); + entries->gid_index = gid_attr->index; + entries->port_num = gid_attr->port_num; + entries->gid_type = gid_attr->gid_type; + ndev = rcu_dereference_protected( + gid_attr->ndev, + lockdep_is_held(&table->rwlock)); + if (ndev) + entries->netdev_ifindex = ndev->ifindex; + + num_entries++; + entries++; + } + read_unlock_irqrestore(&table->rwlock, flags); + } + + return num_entries; +err: + read_unlock_irqrestore(&table->rwlock, flags); + return ret; +} +EXPORT_SYMBOL(rdma_query_gid_table); + +/** * rdma_put_gid_attr - Release reference to the GID attribute * @attr: Pointer to the GID attribute whose reference * needs to be released. @@ -1303,7 +1364,7 @@ struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) struct ib_gid_table_entry *entry = container_of(attr, struct ib_gid_table_entry, attr); struct ib_device *device = entry->attr.device; - struct net_device *ndev = ERR_PTR(-ENODEV); + struct net_device *ndev = ERR_PTR(-EINVAL); u8 port_num = entry->attr.port_num; struct ib_gid_table *table; unsigned long flags; @@ -1315,8 +1376,7 @@ struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) valid = is_gid_entry_valid(table->data_vec[attr->index]); if (valid) { ndev = rcu_dereference(attr->ndev); - if (!ndev || - (ndev && ((READ_ONCE(ndev->flags) & IFF_UP) == 0))) + if (!ndev) ndev = ERR_PTR(-ENODEV); } read_unlock_irqrestore(&table->rwlock, flags); diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h index 66a8f369a2fa..bae29f50adff 100644 --- a/include/rdma/ib_cache.h +++ b/include/rdma/ib_cache.h @@ -110,5 +110,8 @@ const struct ib_gid_attr *rdma_get_gid_attr(struct ib_device *device, u8 port_num, int index); void rdma_put_gid_attr(const struct ib_gid_attr *attr); void rdma_hold_gid_attr(const struct ib_gid_attr *attr); +ssize_t rdma_query_gid_table(struct ib_device *device, + struct ib_uverbs_gid_entry *entries, + size_t max_entries); #endif /* _IB_CACHE_H */ diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h index fb8cdb38198b..14820082de5e 100644 --- a/include/uapi/rdma/ib_user_ioctl_verbs.h +++ b/include/uapi/rdma/ib_user_ioctl_verbs.h @@ -251,4 +251,12 @@ enum rdma_driver_id { RDMA_DRIVER_SIW, }; +struct ib_uverbs_gid_entry { + __aligned_u64 gid[2]; + __u32 gid_index; + __u32 port_num; + __u32 gid_type; + __u32 netdev_ifindex; /* It is 0 if there is no netdev associated with it */ +}; + #endif |