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RDMA/rxe: Enforce IBA C11-17

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Add a counter to keep track of the number of WQs connected to a CQ and
return an error if destroy_cq() is called while the counter is non zero.

Link: https://lore.kernel.org/r/20220421014042.26985-8-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2022-04-20 20:40:40 -05:00 committed by Jason Gunthorpe
parent cde3f5d682
commit 4703b4f0d9
3 changed files with 17 additions and 0 deletions
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10
drivers/infiniband/sw/rxe/rxe_qp.c
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@ -322,6 +322,9 @@ int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
qp->scq = scq;
qp->srq = srq;
atomic_inc(&rcq->num_wq);
atomic_inc(&scq->num_wq);
rxe_qp_init_misc(rxe, qp, init);
err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
@ -341,6 +344,9 @@ err2:
rxe_queue_cleanup(qp->sq.queue);
qp->sq.queue = NULL;
err1:
atomic_dec(&rcq->num_wq);
atomic_dec(&scq->num_wq);
qp->pd = NULL;
qp->rcq = NULL;
qp->scq = NULL;
@ -798,10 +804,14 @@ static void rxe_qp_do_cleanup(struct work_struct *work)
if (qp->rq.queue)
rxe_queue_cleanup(qp->rq.queue);
atomic_dec(&qp->scq->num_wq);
if (qp->scq)
rxe_put(qp->scq);
atomic_dec(&qp->rcq->num_wq);
if (qp->rcq)
rxe_put(qp->rcq);
if (qp->pd)
rxe_put(qp->pd);

6
drivers/infiniband/sw/rxe/rxe_verbs.c
View File

@ -795,6 +795,12 @@ static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
{
struct rxe_cq *cq = to_rcq(ibcq);
/* See IBA C11-17: The CI shall return an error if this Verb is
* invoked while a Work Queue is still associated with the CQ.
*/
if (atomic_read(&cq->num_wq))
return -EINVAL;
rxe_cq_disable(cq);
rxe_put(cq);

1
drivers/infiniband/sw/rxe/rxe_verbs.h
View File

@ -67,6 +67,7 @@ struct rxe_cq {
bool is_dying;
bool is_user;
struct tasklet_struct comp_task;
atomic_t num_wq;
};
enum wqe_state {