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authorYishai Hadas <yishaih@mellanox.com>2013-08-01 18:49:53 +0300
committerRoland Dreier <roland@purestorage.com>2013-08-13 11:21:32 -0700
commit73c40c616a33fcb7961b3c90a91b550813129b3e (patch)
tree6c9cc5b71a72c437ff97c3237c5126572e276f98 /include/rdma
parent5c5f3f0a74740c8f7bca8255741291bb0d2ebe4b (diff)
downloadop-kernel-dev-73c40c616a33fcb7961b3c90a91b550813129b3e.zip
op-kernel-dev-73c40c616a33fcb7961b3c90a91b550813129b3e.tar.gz
IB/core: Add locking around event dispatching on XRC target QPs
Fix a potential race when event occurrs on a target XRC QP and in the middle of reporting that on its shared qps, one of them is destroyed by user space application. Also add note for kernel consumers in ib_verbs.h that they must not destroy the QP from within the handler. Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 645c3ce..a84d3df 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -635,6 +635,12 @@ enum ib_qp_create_flags {
IB_QP_CREATE_RESERVED_END = 1 << 31,
};
+
+/*
+ * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
+ * callback to destroy the passed in QP.
+ */
+
struct ib_qp_init_attr {
void (*event_handler)(struct ib_event *, void *);
void *qp_context;
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