From: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Enable QP creation with a given source QP number, the created QP will
use the source QPN as its wire QP number.
To create such a QP, root privileges (i.e. CAP_NET_RAW) are required
from the user application.
This comes as a pre-patch for downstream patches in this series to
allow user space applications to accelerate traffic which is typically
handled by IPoIB ULP.
Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Reviewed-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
---
drivers/infiniband/core/uverbs_cmd.c | 17 ++++++++++++++---
include/uapi/rdma/ib_user_verbs.h | 2 +-
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 70b7fb156414..d6cca0c7a5c5 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1385,8 +1385,9 @@ static int create_qp(struct ib_uverbs_file *file,
attr.rwq_ind_tbl = ind_tbl;
}
- if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +
- sizeof(cmd->reserved1)) && cmd->reserved1) {
+ if (cmd_sz > sizeof(*cmd) &&
+ !ib_is_udata_cleared(ucore, sizeof(*cmd),
+ cmd_sz - sizeof(*cmd))) {
ret = -EOPNOTSUPP;
goto err_put;
}
@@ -1484,11 +1485,21 @@ static int create_qp(struct ib_uverbs_file *file,
IB_QP_CREATE_MANAGED_SEND |
IB_QP_CREATE_MANAGED_RECV |
IB_QP_CREATE_SCATTER_FCS |
- IB_QP_CREATE_CVLAN_STRIPPING)) {
+ IB_QP_CREATE_CVLAN_STRIPPING |
+ IB_QP_CREATE_SOURCE_QPN)) {
ret = -EINVAL;
goto err_put;
}
+ if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
+ if (!capable(CAP_NET_RAW)) {
+ ret = -EPERM;
+ goto err_put;
+ }
+
+ attr.source_qpn = cmd->source_qpn;
+ }
+
buf = (void *)cmd + sizeof(*cmd);
if (cmd_sz > sizeof(*cmd))
if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index 270c350bedc6..63656d2e8705 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -578,7 +578,7 @@ struct ib_uverbs_ex_create_qp {
__u32 comp_mask;
__u32 create_flags;
__u32 rwq_ind_tbl_handle;
- __u32 reserved1;
+ __u32 source_qpn;
};
struct ib_uverbs_open_qp {
--
2.12.2
--
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