diff options
Diffstat (limited to 'net/dcb')
| -rw-r--r-- | net/dcb/Kconfig | 2 | ||||
| -rw-r--r-- | net/dcb/Makefile | 2 | ||||
| -rw-r--r-- | net/dcb/dcbnl.c | 76 |
3 files changed, 71 insertions, 9 deletions
diff --git a/net/dcb/Kconfig b/net/dcb/Kconfig index 917e6e7b1cac..efee8b9fe1d4 100644 --- a/net/dcb/Kconfig +++ b/net/dcb/Kconfig @@ -2,7 +2,7 @@ config DCB bool "Data Center Bridging support" default n - ---help--- + help This enables support for configuring Data Center Bridging (DCB) features on DCB capable Ethernet adapters via rtnetlink. Say 'Y' if you have a DCB capable Ethernet adapter which supports this diff --git a/net/dcb/Makefile b/net/dcb/Makefile index 3016e5a7716a..2c0fa16ee2a9 100644 --- a/net/dcb/Makefile +++ b/net/dcb/Makefile @@ -1,2 +1,2 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_DCB) += dcbnl.o dcbevent.o +obj-y += dcbnl.o dcbevent.o diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index d2a4553bcf39..dc4fb699b56c 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -1381,7 +1381,7 @@ static int dcbnl_notify(struct net_device *dev, int event, int cmd, skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh); if (!skb) - return -ENOBUFS; + return -ENOMEM; if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE) err = dcbnl_ieee_fill(skb, dev); @@ -1426,6 +1426,7 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh, { const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops; struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1]; + int prio; int err; if (!ops) @@ -1475,6 +1476,13 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh, struct dcbnl_buffer *buffer = nla_data(ieee[DCB_ATTR_DCB_BUFFER]); + for (prio = 0; prio < ARRAY_SIZE(buffer->prio2buffer); prio++) { + if (buffer->prio2buffer[prio] >= DCBX_MAX_BUFFERS) { + err = -EINVAL; + goto err; + } + } + err = ops->dcbnl_setbuffer(netdev, buffer); if (err) goto err; @@ -1736,7 +1744,7 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, struct net_device *netdev; struct dcbmsg *dcb = nlmsg_data(nlh); struct nlattr *tb[DCB_ATTR_MAX + 1]; - u32 portid = skb ? NETLINK_CB(skb).portid : 0; + u32 portid = NETLINK_CB(skb).portid; int ret = -EINVAL; struct sk_buff *reply_skb; struct nlmsghdr *reply_nlh = NULL; @@ -1757,6 +1765,8 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, fn = &reply_funcs[dcb->cmd]; if (!fn->cb) return -EOPNOTSUPP; + if (fn->type == RTM_SETDCB && !netlink_capable(skb, CAP_NET_ADMIN)) + return -EPERM; if (!tb[DCB_ATTR_IFNAME]) return -EINVAL; @@ -1771,7 +1781,7 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq, nlh->nlmsg_flags, &reply_nlh); if (!reply_skb) - return -ENOBUFS; + return -ENOMEM; ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb); if (ret < 0) { @@ -1819,6 +1829,8 @@ static int dcb_app_add(const struct dcb_app *app, int ifindex) /** * dcb_getapp - retrieve the DCBX application user priority + * @dev: network interface + * @app: application to get user priority of * * On success returns a non-zero 802.1p user priority bitmap * otherwise returns 0 as the invalid user priority bitmap to @@ -1841,6 +1853,8 @@ EXPORT_SYMBOL(dcb_getapp); /** * dcb_setapp - add CEE dcb application data to app list + * @dev: network interface + * @new: application data to add * * Priority 0 is an invalid priority in CEE spec. This routine * removes applications from the app list if the priority is @@ -1882,6 +1896,8 @@ EXPORT_SYMBOL(dcb_setapp); /** * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority + * @dev: network interface + * @app: where to store the retrieve application data * * Helper routine which on success returns a non-zero 802.1Qaz user * priority bitmap otherwise returns 0 to indicate the dcb_app was @@ -1904,6 +1920,8 @@ EXPORT_SYMBOL(dcb_ieee_getapp_mask); /** * dcb_ieee_setapp - add IEEE dcb application data to app list + * @dev: network interface + * @new: application data to add * * This adds Application data to the list. Multiple application * entries may exists for the same selector and protocol as long @@ -1938,6 +1956,8 @@ EXPORT_SYMBOL(dcb_ieee_setapp); /** * dcb_ieee_delapp - delete IEEE dcb application data from list + * @dev: network interface + * @del: application data to delete * * This removes a matching APP data from the APP list */ @@ -1967,7 +1987,7 @@ int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del) } EXPORT_SYMBOL(dcb_ieee_delapp); -/** +/* * dcb_ieee_getapp_prio_dscp_mask_map - For a given device, find mapping from * priorities to the DSCP values assigned to that priority. Initialize p_map * such that each map element holds a bit mask of DSCP values configured for @@ -1996,7 +2016,7 @@ void dcb_ieee_getapp_prio_dscp_mask_map(const struct net_device *dev, } EXPORT_SYMBOL(dcb_ieee_getapp_prio_dscp_mask_map); -/** +/* * dcb_ieee_getapp_dscp_prio_mask_map - For a given device, find mapping from * DSCP values to the priorities assigned to that DSCP value. Initialize p_map * such that each map element holds a bit mask of priorities configured for a @@ -2023,7 +2043,7 @@ dcb_ieee_getapp_dscp_prio_mask_map(const struct net_device *dev, } EXPORT_SYMBOL(dcb_ieee_getapp_dscp_prio_mask_map); -/** +/* * Per 802.1Q-2014, the selector value of 1 is used for matching on Ethernet * type, with valid PID values >= 1536. A special meaning is then assigned to * protocol value of 0: "default priority. For use when priority is not @@ -2053,9 +2073,51 @@ u8 dcb_ieee_getapp_default_prio_mask(const struct net_device *dev) } EXPORT_SYMBOL(dcb_ieee_getapp_default_prio_mask); +static void dcbnl_flush_dev(struct net_device *dev) +{ + struct dcb_app_type *itr, *tmp; + + spin_lock_bh(&dcb_lock); + + list_for_each_entry_safe(itr, tmp, &dcb_app_list, list) { + if (itr->ifindex == dev->ifindex) { + list_del(&itr->list); + kfree(itr); + } + } + + spin_unlock_bh(&dcb_lock); +} + +static int dcbnl_netdevice_event(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + + switch (event) { + case NETDEV_UNREGISTER: + if (!dev->dcbnl_ops) + return NOTIFY_DONE; + + dcbnl_flush_dev(dev); + + return NOTIFY_OK; + default: + return NOTIFY_DONE; + } +} + +static struct notifier_block dcbnl_nb __read_mostly = { + .notifier_call = dcbnl_netdevice_event, +}; + static int __init dcbnl_init(void) { - INIT_LIST_HEAD(&dcb_app_list); + int err; + + err = register_netdevice_notifier(&dcbnl_nb); + if (err) + return err; rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, 0); rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, 0); |