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authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 08:33:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 08:33:31 -0700
commit26d2177e977c912863ac04f6c1a967e793ca3a56 (patch)
tree48da04fb0b947cfa404747690d7081b657e33221 /drivers/infiniband/core/roce_gid_mgmt.c
parentMerge tag 'for-linus-4.3' of git://git.code.sf.net/p/openipmi/linux-ipmi (diff)
parentIB/ipoib: Suppress warning for send only join failures (diff)
downloadlinux-dev-26d2177e977c912863ac04f6c1a967e793ca3a56.tar.xz
linux-dev-26d2177e977c912863ac04f6c1a967e793ca3a56.zip
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull inifiniband/rdma updates from Doug Ledford: "This is a fairly sizeable set of changes. I've put them through a decent amount of testing prior to sending the pull request due to that. There are still a few fixups that I know are coming, but I wanted to go ahead and get the big, sizable chunk into your hands sooner rather than waiting for those last few fixups. Of note is the fact that this creates what is intended to be a temporary area in the drivers/staging tree specifically for some cleanups and additions that are coming for the RDMA stack. We deprecated two drivers (ipath and amso1100) and are waiting to hear back if we can deprecate another one (ehca). We also put Intel's new hfi1 driver into this area because it needs to be refactored and a transfer library created out of the factored out code, and then it and the qib driver and the soft-roce driver should all be modified to use that library. I expect drivers/staging/rdma to be around for three or four kernel releases and then to go away as all of the work is completed and final deletions of deprecated drivers are done. Summary of changes for 4.3: - Create drivers/staging/rdma - Move amso1100 driver to staging/rdma and schedule for deletion - Move ipath driver to staging/rdma and schedule for deletion - Add hfi1 driver to staging/rdma and set TODO for move to regular tree - Initial support for namespaces to be used on RDMA devices - Add RoCE GID table handling to the RDMA core caching code - Infrastructure to support handling of devices with differing read and write scatter gather capabilities - Various iSER updates - Kill off unsafe usage of global mr registrations - Update SRP driver - Misc mlx4 driver updates - Support for the mr_alloc verb - Support for a netlink interface between kernel and user space cache daemon to speed path record queries and route resolution - Ininitial support for safe hot removal of verbs devices" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (136 commits) IB/ipoib: Suppress warning for send only join failures IB/ipoib: Clean up send-only multicast joins IB/srp: Fix possible protection fault IB/core: Move SM class defines from ib_mad.h to ib_smi.h IB/core: Remove unnecessary defines from ib_mad.h IB/hfi1: Add PSM2 user space header to header_install IB/hfi1: Add CSRs for CONFIG_SDMA_VERBOSITY mlx5: Fix incorrect wc pkey_index assignment for GSI messages IB/mlx5: avoid destroying a NULL mr in reg_user_mr error flow IB/uverbs: reject invalid or unknown opcodes IB/cxgb4: Fix if statement in pick_local_ip6adddrs IB/sa: Fix rdma netlink message flags IB/ucma: HW Device hot-removal support IB/mlx4_ib: Disassociate support IB/uverbs: Enable device removal when there are active user space applications IB/uverbs: Explicitly pass ib_dev to uverbs commands IB/uverbs: Fix race between ib_uverbs_open and remove_one IB/uverbs: Fix reference counting usage of event files IB/core: Make ib_dealloc_pd return void IB/srp: Create an insecure all physical rkey only if needed ...
Diffstat (limited to 'drivers/infiniband/core/roce_gid_mgmt.c')
-rw-r--r--drivers/infiniband/core/roce_gid_mgmt.c728
1 files changed, 728 insertions, 0 deletions
diff --git a/drivers/infiniband/core/roce_gid_mgmt.c b/drivers/infiniband/core/roce_gid_mgmt.c
new file mode 100644
index 000000000000..6b24cba1e474
--- /dev/null
+++ b/drivers/infiniband/core/roce_gid_mgmt.c
@@ -0,0 +1,728 @@
+/*
+ * Copyright (c) 2015, Mellanox Technologies inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "core_priv.h"
+
+#include <linux/in.h>
+#include <linux/in6.h>
+
+/* For in6_dev_get/in6_dev_put */
+#include <net/addrconf.h>
+#include <net/bonding.h>
+
+#include <rdma/ib_cache.h>
+#include <rdma/ib_addr.h>
+
+enum gid_op_type {
+ GID_DEL = 0,
+ GID_ADD
+};
+
+struct update_gid_event_work {
+ struct work_struct work;
+ union ib_gid gid;
+ struct ib_gid_attr gid_attr;
+ enum gid_op_type gid_op;
+};
+
+#define ROCE_NETDEV_CALLBACK_SZ 3
+struct netdev_event_work_cmd {
+ roce_netdev_callback cb;
+ roce_netdev_filter filter;
+ struct net_device *ndev;
+ struct net_device *filter_ndev;
+};
+
+struct netdev_event_work {
+ struct work_struct work;
+ struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ];
+};
+
+static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev,
+ u8 port, union ib_gid *gid,
+ struct ib_gid_attr *gid_attr)
+{
+ switch (gid_op) {
+ case GID_ADD:
+ ib_cache_gid_add(ib_dev, port, gid, gid_attr);
+ break;
+ case GID_DEL:
+ ib_cache_gid_del(ib_dev, port, gid, gid_attr);
+ break;
+ }
+}
+
+enum bonding_slave_state {
+ BONDING_SLAVE_STATE_ACTIVE = 1UL << 0,
+ BONDING_SLAVE_STATE_INACTIVE = 1UL << 1,
+ /* No primary slave or the device isn't a slave in bonding */
+ BONDING_SLAVE_STATE_NA = 1UL << 2,
+};
+
+static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev,
+ struct net_device *upper)
+{
+ if (upper && netif_is_bond_master(upper)) {
+ struct net_device *pdev =
+ bond_option_active_slave_get_rcu(netdev_priv(upper));
+
+ if (pdev)
+ return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE :
+ BONDING_SLAVE_STATE_INACTIVE;
+ }
+
+ return BONDING_SLAVE_STATE_NA;
+}
+
+static bool is_upper_dev_rcu(struct net_device *dev, struct net_device *upper)
+{
+ struct net_device *_upper = NULL;
+ struct list_head *iter;
+
+ netdev_for_each_all_upper_dev_rcu(dev, _upper, iter)
+ if (_upper == upper)
+ break;
+
+ return _upper == upper;
+}
+
+#define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \
+ BONDING_SLAVE_STATE_NA)
+static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *event_ndev = (struct net_device *)cookie;
+ struct net_device *real_dev;
+ int res;
+
+ if (!rdma_ndev)
+ return 0;
+
+ rcu_read_lock();
+ real_dev = rdma_vlan_dev_real_dev(event_ndev);
+ if (!real_dev)
+ real_dev = event_ndev;
+
+ res = ((is_upper_dev_rcu(rdma_ndev, event_ndev) &&
+ (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) &
+ REQUIRED_BOND_STATES)) ||
+ real_dev == rdma_ndev);
+
+ rcu_read_unlock();
+ return res;
+}
+
+static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *master_dev;
+ int res;
+
+ if (!rdma_ndev)
+ return 0;
+
+ rcu_read_lock();
+ master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev);
+ res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) ==
+ BONDING_SLAVE_STATE_INACTIVE;
+ rcu_read_unlock();
+
+ return res;
+}
+
+static int pass_all_filter(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ return 1;
+}
+
+static int upper_device_filter(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *event_ndev = (struct net_device *)cookie;
+ int res;
+
+ if (!rdma_ndev)
+ return 0;
+
+ if (rdma_ndev == event_ndev)
+ return 1;
+
+ rcu_read_lock();
+ res = is_upper_dev_rcu(rdma_ndev, event_ndev);
+ rcu_read_unlock();
+
+ return res;
+}
+
+static void update_gid_ip(enum gid_op_type gid_op,
+ struct ib_device *ib_dev,
+ u8 port, struct net_device *ndev,
+ struct sockaddr *addr)
+{
+ union ib_gid gid;
+ struct ib_gid_attr gid_attr;
+
+ rdma_ip2gid(addr, &gid);
+ memset(&gid_attr, 0, sizeof(gid_attr));
+ gid_attr.ndev = ndev;
+
+ update_gid(gid_op, ib_dev, port, &gid, &gid_attr);
+}
+
+static void enum_netdev_default_gids(struct ib_device *ib_dev,
+ u8 port, struct net_device *event_ndev,
+ struct net_device *rdma_ndev)
+{
+ rcu_read_lock();
+ if (!rdma_ndev ||
+ ((rdma_ndev != event_ndev &&
+ !is_upper_dev_rcu(rdma_ndev, event_ndev)) ||
+ is_eth_active_slave_of_bonding_rcu(rdma_ndev,
+ netdev_master_upper_dev_get_rcu(rdma_ndev)) ==
+ BONDING_SLAVE_STATE_INACTIVE)) {
+ rcu_read_unlock();
+ return;
+ }
+ rcu_read_unlock();
+
+ ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
+ IB_CACHE_GID_DEFAULT_MODE_SET);
+}
+
+static void bond_delete_netdev_default_gids(struct ib_device *ib_dev,
+ u8 port,
+ struct net_device *event_ndev,
+ struct net_device *rdma_ndev)
+{
+ struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev);
+
+ if (!rdma_ndev)
+ return;
+
+ if (!real_dev)
+ real_dev = event_ndev;
+
+ rcu_read_lock();
+
+ if (is_upper_dev_rcu(rdma_ndev, event_ndev) &&
+ is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) ==
+ BONDING_SLAVE_STATE_INACTIVE) {
+ rcu_read_unlock();
+
+ ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
+ IB_CACHE_GID_DEFAULT_MODE_DELETE);
+ } else {
+ rcu_read_unlock();
+ }
+}
+
+static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
+ u8 port, struct net_device *ndev)
+{
+ struct in_device *in_dev;
+
+ if (ndev->reg_state >= NETREG_UNREGISTERING)
+ return;
+
+ in_dev = in_dev_get(ndev);
+ if (!in_dev)
+ return;
+
+ for_ifa(in_dev) {
+ struct sockaddr_in ip;
+
+ ip.sin_family = AF_INET;
+ ip.sin_addr.s_addr = ifa->ifa_address;
+ update_gid_ip(GID_ADD, ib_dev, port, ndev,
+ (struct sockaddr *)&ip);
+ }
+ endfor_ifa(in_dev);
+
+ in_dev_put(in_dev);
+}
+
+static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
+ u8 port, struct net_device *ndev)
+{
+ struct inet6_ifaddr *ifp;
+ struct inet6_dev *in6_dev;
+ struct sin6_list {
+ struct list_head list;
+ struct sockaddr_in6 sin6;
+ };
+ struct sin6_list *sin6_iter;
+ struct sin6_list *sin6_temp;
+ struct ib_gid_attr gid_attr = {.ndev = ndev};
+ LIST_HEAD(sin6_list);
+
+ if (ndev->reg_state >= NETREG_UNREGISTERING)
+ return;
+
+ in6_dev = in6_dev_get(ndev);
+ if (!in6_dev)
+ return;
+
+ read_lock_bh(&in6_dev->lock);
+ list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
+ struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+
+ if (!entry) {
+ pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv6 update\n");
+ continue;
+ }
+
+ entry->sin6.sin6_family = AF_INET6;
+ entry->sin6.sin6_addr = ifp->addr;
+ list_add_tail(&entry->list, &sin6_list);
+ }
+ read_unlock_bh(&in6_dev->lock);
+
+ in6_dev_put(in6_dev);
+
+ list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
+ union ib_gid gid;
+
+ rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
+ update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
+ list_del(&sin6_iter->list);
+ kfree(sin6_iter);
+ }
+}
+
+static void _add_netdev_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *ndev)
+{
+ enum_netdev_ipv4_ips(ib_dev, port, ndev);
+ if (IS_ENABLED(CONFIG_IPV6))
+ enum_netdev_ipv6_ips(ib_dev, port, ndev);
+}
+
+static void add_netdev_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *event_ndev = (struct net_device *)cookie;
+
+ enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
+ _add_netdev_ips(ib_dev, port, event_ndev);
+}
+
+static void del_netdev_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *event_ndev = (struct net_device *)cookie;
+
+ ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
+}
+
+static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
+ u8 port,
+ struct net_device *rdma_ndev,
+ void *cookie)
+{
+ struct net *net;
+ struct net_device *ndev;
+
+ /* Lock the rtnl to make sure the netdevs does not move under
+ * our feet
+ */
+ rtnl_lock();
+ for_each_net(net)
+ for_each_netdev(net, ndev)
+ if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev))
+ add_netdev_ips(ib_dev, port, rdma_ndev, ndev);
+ rtnl_unlock();
+}
+
+/* This function will rescan all of the network devices in the system
+ * and add their gids, as needed, to the relevant RoCE devices. */
+int roce_rescan_device(struct ib_device *ib_dev)
+{
+ ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
+ enum_all_gids_of_dev_cb, NULL);
+
+ return 0;
+}
+
+static void callback_for_addr_gid_device_scan(struct ib_device *device,
+ u8 port,
+ struct net_device *rdma_ndev,
+ void *cookie)
+{
+ struct update_gid_event_work *parsed = cookie;
+
+ return update_gid(parsed->gid_op, device,
+ port, &parsed->gid,
+ &parsed->gid_attr);
+}
+
+static void handle_netdev_upper(struct ib_device *ib_dev, u8 port,
+ void *cookie,
+ void (*handle_netdev)(struct ib_device *ib_dev,
+ u8 port,
+ struct net_device *ndev))
+{
+ struct net_device *ndev = (struct net_device *)cookie;
+ struct upper_list {
+ struct list_head list;
+ struct net_device *upper;
+ };
+ struct net_device *upper;
+ struct list_head *iter;
+ struct upper_list *upper_iter;
+ struct upper_list *upper_temp;
+ LIST_HEAD(upper_list);
+
+ rcu_read_lock();
+ netdev_for_each_all_upper_dev_rcu(ndev, upper, iter) {
+ struct upper_list *entry = kmalloc(sizeof(*entry),
+ GFP_ATOMIC);
+
+ if (!entry) {
+ pr_info("roce_gid_mgmt: couldn't allocate entry to delete ndev\n");
+ continue;
+ }
+
+ list_add_tail(&entry->list, &upper_list);
+ dev_hold(upper);
+ entry->upper = upper;
+ }
+ rcu_read_unlock();
+
+ handle_netdev(ib_dev, port, ndev);
+ list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
+ list) {
+ handle_netdev(ib_dev, port, upper_iter->upper);
+ dev_put(upper_iter->upper);
+ list_del(&upper_iter->list);
+ kfree(upper_iter);
+ }
+}
+
+static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
+ struct net_device *event_ndev)
+{
+ ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
+}
+
+static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
+}
+
+static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
+}
+
+static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev,
+ void *cookie)
+{
+ struct net_device *master_ndev;
+
+ rcu_read_lock();
+ master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
+ if (master_ndev)
+ dev_hold(master_ndev);
+ rcu_read_unlock();
+
+ if (master_ndev) {
+ bond_delete_netdev_default_gids(ib_dev, port, master_ndev,
+ rdma_ndev);
+ dev_put(master_ndev);
+ }
+}
+
+static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port,
+ struct net_device *rdma_ndev, void *cookie)
+{
+ struct net_device *event_ndev = (struct net_device *)cookie;
+
+ bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
+}
+
+/* The following functions operate on all IB devices. netdevice_event and
+ * addr_event execute ib_enum_all_roce_netdevs through a work.
+ * ib_enum_all_roce_netdevs iterates through all IB devices.
+ */
+
+static void netdevice_event_work_handler(struct work_struct *_work)
+{
+ struct netdev_event_work *work =
+ container_of(_work, struct netdev_event_work, work);
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
+ ib_enum_all_roce_netdevs(work->cmds[i].filter,
+ work->cmds[i].filter_ndev,
+ work->cmds[i].cb,
+ work->cmds[i].ndev);
+ dev_put(work->cmds[i].ndev);
+ dev_put(work->cmds[i].filter_ndev);
+ }
+
+ kfree(work);
+}
+
+static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
+ struct net_device *ndev)
+{
+ unsigned int i;
+ struct netdev_event_work *ndev_work =
+ kmalloc(sizeof(*ndev_work), GFP_KERNEL);
+
+ if (!ndev_work) {
+ pr_warn("roce_gid_mgmt: can't allocate work for netdevice_event\n");
+ return NOTIFY_DONE;
+ }
+
+ memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
+ for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
+ if (!ndev_work->cmds[i].ndev)
+ ndev_work->cmds[i].ndev = ndev;
+ if (!ndev_work->cmds[i].filter_ndev)
+ ndev_work->cmds[i].filter_ndev = ndev;
+ dev_hold(ndev_work->cmds[i].ndev);
+ dev_hold(ndev_work->cmds[i].filter_ndev);
+ }
+ INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
+
+ queue_work(ib_wq, &ndev_work->work);
+
+ return NOTIFY_DONE;
+}
+
+static const struct netdev_event_work_cmd add_cmd = {
+ .cb = add_netdev_ips, .filter = is_eth_port_of_netdev};
+static const struct netdev_event_work_cmd add_cmd_upper_ips = {
+ .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev};
+
+static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info,
+ struct netdev_event_work_cmd *cmds)
+{
+ static const struct netdev_event_work_cmd upper_ips_del_cmd = {
+ .cb = del_netdev_upper_ips, .filter = upper_device_filter};
+ static const struct netdev_event_work_cmd bonding_default_del_cmd = {
+ .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave};
+
+ if (changeupper_info->linking == false) {
+ cmds[0] = upper_ips_del_cmd;
+ cmds[0].ndev = changeupper_info->upper_dev;
+ cmds[1] = add_cmd;
+ } else {
+ cmds[0] = bonding_default_del_cmd;
+ cmds[0].ndev = changeupper_info->upper_dev;
+ cmds[1] = add_cmd_upper_ips;
+ cmds[1].ndev = changeupper_info->upper_dev;
+ cmds[1].filter_ndev = changeupper_info->upper_dev;
+ }
+}
+
+static int netdevice_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ static const struct netdev_event_work_cmd del_cmd = {
+ .cb = del_netdev_ips, .filter = pass_all_filter};
+ static const struct netdev_event_work_cmd bonding_default_del_cmd_join = {
+ .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave};
+ static const struct netdev_event_work_cmd default_del_cmd = {
+ .cb = del_netdev_default_ips, .filter = pass_all_filter};
+ static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
+ .cb = del_netdev_upper_ips, .filter = upper_device_filter};
+ struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+ struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
+
+ if (ndev->type != ARPHRD_ETHER)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_REGISTER:
+ case NETDEV_UP:
+ cmds[0] = bonding_default_del_cmd_join;
+ cmds[1] = add_cmd;
+ break;
+
+ case NETDEV_UNREGISTER:
+ if (ndev->reg_state < NETREG_UNREGISTERED)
+ cmds[0] = del_cmd;
+ else
+ return NOTIFY_DONE;
+ break;
+
+ case NETDEV_CHANGEADDR:
+ cmds[0] = default_del_cmd;
+ cmds[1] = add_cmd;
+ break;
+
+ case NETDEV_CHANGEUPPER:
+ netdevice_event_changeupper(
+ container_of(ptr, struct netdev_notifier_changeupper_info, info),
+ cmds);
+ break;
+
+ case NETDEV_BONDING_FAILOVER:
+ cmds[0] = bonding_event_ips_del_cmd;
+ cmds[1] = bonding_default_del_cmd_join;
+ cmds[2] = add_cmd_upper_ips;
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return netdevice_queue_work(cmds, ndev);
+}
+
+static void update_gid_event_work_handler(struct work_struct *_work)
+{
+ struct update_gid_event_work *work =
+ container_of(_work, struct update_gid_event_work, work);
+
+ ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev,
+ callback_for_addr_gid_device_scan, work);
+
+ dev_put(work->gid_attr.ndev);
+ kfree(work);
+}
+
+static int addr_event(struct notifier_block *this, unsigned long event,
+ struct sockaddr *sa, struct net_device *ndev)
+{
+ struct update_gid_event_work *work;
+ enum gid_op_type gid_op;
+
+ if (ndev->type != ARPHRD_ETHER)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ gid_op = GID_ADD;
+ break;
+
+ case NETDEV_DOWN:
+ gid_op = GID_DEL;
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+
+ work = kmalloc(sizeof(*work), GFP_ATOMIC);
+ if (!work) {
+ pr_warn("roce_gid_mgmt: Couldn't allocate work for addr_event\n");
+ return NOTIFY_DONE;
+ }
+
+ INIT_WORK(&work->work, update_gid_event_work_handler);
+
+ rdma_ip2gid(sa, &work->gid);
+ work->gid_op = gid_op;
+
+ memset(&work->gid_attr, 0, sizeof(work->gid_attr));
+ dev_hold(ndev);
+ work->gid_attr.ndev = ndev;
+
+ queue_work(ib_wq, &work->work);
+
+ return NOTIFY_DONE;
+}
+
+static int inetaddr_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct sockaddr_in in;
+ struct net_device *ndev;
+ struct in_ifaddr *ifa = ptr;
+
+ in.sin_family = AF_INET;
+ in.sin_addr.s_addr = ifa->ifa_address;
+ ndev = ifa->ifa_dev->dev;
+
+ return addr_event(this, event, (struct sockaddr *)&in, ndev);
+}
+
+static int inet6addr_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct sockaddr_in6 in6;
+ struct net_device *ndev;
+ struct inet6_ifaddr *ifa6 = ptr;
+
+ in6.sin6_family = AF_INET6;
+ in6.sin6_addr = ifa6->addr;
+ ndev = ifa6->idev->dev;
+
+ return addr_event(this, event, (struct sockaddr *)&in6, ndev);
+}
+
+static struct notifier_block nb_netdevice = {
+ .notifier_call = netdevice_event
+};
+
+static struct notifier_block nb_inetaddr = {
+ .notifier_call = inetaddr_event
+};
+
+static struct notifier_block nb_inet6addr = {
+ .notifier_call = inet6addr_event
+};
+
+int __init roce_gid_mgmt_init(void)
+{
+ register_inetaddr_notifier(&nb_inetaddr);
+ if (IS_ENABLED(CONFIG_IPV6))
+ register_inet6addr_notifier(&nb_inet6addr);
+ /* We relay on the netdevice notifier to enumerate all
+ * existing devices in the system. Register to this notifier
+ * last to make sure we will not miss any IP add/del
+ * callbacks.
+ */
+ register_netdevice_notifier(&nb_netdevice);
+
+ return 0;
+}
+
+void __exit roce_gid_mgmt_cleanup(void)
+{
+ if (IS_ENABLED(CONFIG_IPV6))
+ unregister_inet6addr_notifier(&nb_inet6addr);
+ unregister_inetaddr_notifier(&nb_inetaddr);
+ unregister_netdevice_notifier(&nb_netdevice);
+ /* Ensure all gid deletion tasks complete before we go down,
+ * to avoid any reference to free'd memory. By the time
+ * ib-core is removed, all physical devices have been removed,
+ * so no issue with remaining hardware contexts.
+ */
+}