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authorGuvenc Gulce <guvenc@linux.ibm.com>2020-12-01 22:20:40 +0300
committerJakub Kicinski <kuba@kernel.org>2020-12-02 04:56:12 +0300
commit3d453f53c786ac4f1c97022f4bc0e9d7613a05c3 (patch)
tree1e09ea9a98afc639fd62b67f4c411c655c755366 /net/smc
parentddc992866f13373e3fd63fd70d9a4452e0d17d69 (diff)
downloadlinux-3d453f53c786ac4f1c97022f4bc0e9d7613a05c3.tar.xz
net/smc: Add diagnostic information to smc ib-device
During smc ib-device creation, add network device ifindex to smc ib-device structure. Register for netdevice changes and update ib-device accordingly. This is needed for diagnostic purposes. Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/smc')
-rw-r--r--net/smc/smc_ib.c44
-rw-r--r--net/smc/smc_ib.h2
-rw-r--r--net/smc/smc_pnet.c2
3 files changed, 48 insertions, 0 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index fc766b537ac7..61b025c912a9 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -557,6 +557,49 @@ out:
static struct ib_client smc_ib_client;
+static void smc_copy_netdev_ifindex(struct smc_ib_device *smcibdev, int port)
+{
+ struct ib_device *ibdev = smcibdev->ibdev;
+ struct net_device *ndev;
+
+ if (!ibdev->ops.get_netdev)
+ return;
+ ndev = ibdev->ops.get_netdev(ibdev, port + 1);
+ if (ndev) {
+ smcibdev->ndev_ifidx[port] = ndev->ifindex;
+ dev_put(ndev);
+ }
+}
+
+void smc_ib_ndev_change(struct net_device *ndev, unsigned long event)
+{
+ struct smc_ib_device *smcibdev;
+ struct ib_device *libdev;
+ struct net_device *lndev;
+ u8 port_cnt;
+ int i;
+
+ mutex_lock(&smc_ib_devices.mutex);
+ list_for_each_entry(smcibdev, &smc_ib_devices.list, list) {
+ port_cnt = smcibdev->ibdev->phys_port_cnt;
+ for (i = 0; i < min_t(size_t, port_cnt, SMC_MAX_PORTS); i++) {
+ libdev = smcibdev->ibdev;
+ if (!libdev->ops.get_netdev)
+ continue;
+ lndev = libdev->ops.get_netdev(libdev, i + 1);
+ if (lndev)
+ dev_put(lndev);
+ if (lndev != ndev)
+ continue;
+ if (event == NETDEV_REGISTER)
+ smcibdev->ndev_ifidx[i] = ndev->ifindex;
+ if (event == NETDEV_UNREGISTER)
+ smcibdev->ndev_ifidx[i] = 0;
+ }
+ }
+ mutex_unlock(&smc_ib_devices.mutex);
+}
+
/* callback function for ib_register_client() */
static int smc_ib_add_dev(struct ib_device *ibdev)
{
@@ -596,6 +639,7 @@ static int smc_ib_add_dev(struct ib_device *ibdev)
if (smc_pnetid_by_dev_port(ibdev->dev.parent, i,
smcibdev->pnetid[i]))
smc_pnetid_by_table_ib(smcibdev, i + 1);
+ smc_copy_netdev_ifindex(smcibdev, i);
pr_warn_ratelimited("smc: ib device %s port %d has pnetid "
"%.16s%s\n",
smcibdev->ibdev->name, i + 1,
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
index 3b85360a473b..ab37da341fa8 100644
--- a/net/smc/smc_ib.h
+++ b/net/smc/smc_ib.h
@@ -55,11 +55,13 @@ struct smc_ib_device { /* ib-device infos for smc */
struct mutex mutex; /* protect dev setup+cleanup */
atomic_t lnk_cnt_by_port[SMC_MAX_PORTS];
/* number of links per port */
+ int ndev_ifidx[SMC_MAX_PORTS]; /* ndev if indexes */
};
struct smc_buf_desc;
struct smc_link;
+void smc_ib_ndev_change(struct net_device *ndev, unsigned long event);
int smc_ib_register_client(void) __init;
void smc_ib_unregister_client(void);
bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index f3c18b991d35..6f6d33edb135 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -827,9 +827,11 @@ static int smc_pnet_netdev_event(struct notifier_block *this,
case NETDEV_REBOOT:
case NETDEV_UNREGISTER:
smc_pnet_remove_by_ndev(event_dev);
+ smc_ib_ndev_change(event_dev, event);
return NOTIFY_OK;
case NETDEV_REGISTER:
smc_pnet_add_by_ndev(event_dev);
+ smc_ib_ndev_change(event_dev, event);
return NOTIFY_OK;
case NETDEV_UP:
smc_pnet_add_base_pnetid(net, event_dev, ndev_pnetid);