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RDMA/uverbs: Export ib_open_qp() capability to user space

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Allow processes that share the same XRC domain to open an existing
shareable QP.  This permits those processes to receive events on the
shared QP and transfer ownership, so that any process may modify the
QP.  The latter allows the creating process to exit, while a remaining
process can still transition it for path migration purposes.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sean Hefty
2011-08-11 13:57:43 -07:00
committed by Roland Dreier
parent 0e0ec7e063
commit 42849b2697
5 changed files with 110 additions and 3 deletions
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14
include/rdma/ib_user_verbs.h
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@ -84,7 +84,8 @@ enum {
IB_USER_VERBS_CMD_POST_SRQ_RECV,
IB_USER_VERBS_CMD_OPEN_XRCD,
IB_USER_VERBS_CMD_CLOSE_XRCD,
IB_USER_VERBS_CMD_CREATE_XSRQ
IB_USER_VERBS_CMD_CREATE_XSRQ,
IB_USER_VERBS_CMD_OPEN_QP
};
/*
@ -422,6 +423,17 @@ struct ib_uverbs_create_qp {
__u64 driver_data[0];
};
struct ib_uverbs_open_qp {
__u64 response;
__u64 user_handle;
__u32 pd_handle;
__u32 qpn;
__u8 qp_type;
__u8 reserved[7];
__u64 driver_data[0];
};
/* also used for open response */
struct ib_uverbs_create_qp_resp {
__u32 qp_handle;
__u32 qpn;