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[rdma-rc,v1,2/3] IB/core: Fix to avoid deleting IPv6 look alike default GIDs

Message ID 20180423135819.14533-3-leon@kernel.org (mailing list archive)
State Accepted
Headers show

Commit Message

Leon Romanovsky April 23, 2018, 1:58 p.m. UTC 
From: Parav Pandit <parav@mellanox.com>

When IPv6 link local address is removed, if it matches with the default
GID, default GID(s)s gets removed which may not be a desired behavior.
This behavior is introduced by refactor work in Fixes tag.

When IPv6 link address is removed, removing its equivalent RoCEv2 GID
which exactly matches with default RoCEv2 GID, is right thing to do.
However achieving it correctly requires lot more changes, likely in
roce_gid_mgmt.c and core/cache.c. This should be done as independent
patch.

Therefore, this patch preserves behavior of not deleteing default GIDs.
This is done by providing explicit hint to consider default GID property
using mask and default_gid; similar to add_gid().

Fixes: 598ff6bae68 ("IB/core: Refactor GID modify code for RoCE")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/cache.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 08e74c992d9d..dff397842fd7 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -423,8 +423,10 @@  int ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
 	return ret;
 }
 
-int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
-		     union ib_gid *gid, struct ib_gid_attr *attr)
+static int
+_ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
+		  union ib_gid *gid, struct ib_gid_attr *attr,
+		  bool default_gid)
 {
 	struct ib_gid_table *table;
 	int ret = 0;
@@ -434,9 +436,10 @@  int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
 
 	mutex_lock(&table->lock);
 
-	ix = find_gid(table, gid, attr, false,
+	ix = find_gid(table, gid, attr, default_gid,
 		      GID_ATTR_FIND_MASK_GID	  |
 		      GID_ATTR_FIND_MASK_GID_TYPE |
+		      GID_ATTR_FIND_MASK_DEFAULT  |
 		      GID_ATTR_FIND_MASK_NETDEV,
 		      NULL);
 	if (ix < 0) {
@@ -455,6 +458,12 @@  int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
 	return ret;
 }
 
+int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
+		     union ib_gid *gid, struct ib_gid_attr *attr)
+{
+	return _ib_cache_gid_del(ib_dev, port, gid, attr, false);
+}
+
 int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
 				     struct net_device *ndev)
 {
@@ -755,7 +764,7 @@  void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
 			__ib_cache_gid_add(ib_dev, port, &gid,
 					   &gid_attr, mask, true);
 		} else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) {
-			ib_cache_gid_del(ib_dev, port, &gid, &gid_attr);
+			_ib_cache_gid_del(ib_dev, port, &gid, &gid_attr, true);
 		}
 	}
 }