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https://github.com/FEX-Emu/linux.git
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RDMA/cxgb3: Don't free endpoints early
- Keep ref on connection request endpoints until either accepted or rejected so it doesn't get freed early. - Endpoint flags now need to be set via atomic bitops because they can be set on both the iw_cxgb3 workqueue thread and user disconnect threads. - Don't move out of CLOSING too early due to multiple calls to iwch_ep_disconnect. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Steve Wise
Roland Dreier
parent
fa0d4c11c4
commit
6e47fe4350
@ -286,7 +286,7 @@ void __free_ep(struct kref *kref)
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ep = container_of(container_of(kref, struct iwch_ep_common, kref),
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struct iwch_ep, com);
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PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
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if (ep->com.flags & RELEASE_RESOURCES) {
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if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
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cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
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dst_release(ep->dst);
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l2t_release(L2DATA(ep->com.tdev), ep->l2t);
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@ -297,7 +297,7 @@ void __free_ep(struct kref *kref)
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static void release_ep_resources(struct iwch_ep *ep)
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{
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PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
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ep->com.flags |= RELEASE_RESOURCES;
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set_bit(RELEASE_RESOURCES, &ep->com.flags);
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put_ep(&ep->com);
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}
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@ -786,10 +786,12 @@ static void connect_request_upcall(struct iwch_ep *ep)
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event.private_data_len = ep->plen;
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event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
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event.provider_data = ep;
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if (state_read(&ep->parent_ep->com) != DEAD)
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if (state_read(&ep->parent_ep->com) != DEAD) {
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get_ep(&ep->com);
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ep->parent_ep->com.cm_id->event_handler(
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ep->parent_ep->com.cm_id,
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&event);
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}
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put_ep(&ep->parent_ep->com);
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ep->parent_ep = NULL;
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}
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@ -1156,8 +1158,7 @@ static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
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* We get 2 abort replies from the HW. The first one must
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* be ignored except for scribbling that we need one more.
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*/
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if (!(ep->com.flags & ABORT_REQ_IN_PROGRESS)) {
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ep->com.flags |= ABORT_REQ_IN_PROGRESS;
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if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
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return CPL_RET_BUF_DONE;
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}
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@ -1480,7 +1481,6 @@ static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
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* rejects the CR.
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*/
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__state_set(&ep->com, CLOSING);
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get_ep(&ep->com);
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break;
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case MPA_REP_SENT:
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__state_set(&ep->com, CLOSING);
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@ -1561,8 +1561,7 @@ static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
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* We get 2 peer aborts from the HW. The first one must
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* be ignored except for scribbling that we need one more.
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*/
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if (!(ep->com.flags & PEER_ABORT_IN_PROGRESS)) {
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ep->com.flags |= PEER_ABORT_IN_PROGRESS;
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if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
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return CPL_RET_BUF_DONE;
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}
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@ -1591,7 +1590,6 @@ static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
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* the reference on it until the ULP accepts or
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* rejects the CR.
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*/
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get_ep(&ep->com);
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break;
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case MORIBUND:
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case CLOSING:
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@ -1797,6 +1795,7 @@ int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
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err = send_mpa_reject(ep, pdata, pdata_len);
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err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
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}
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put_ep(&ep->com);
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return 0;
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}
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@ -1810,8 +1809,10 @@ int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
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struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
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PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
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if (state_read(&ep->com) == DEAD)
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return -ECONNRESET;
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if (state_read(&ep->com) == DEAD) {
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err = -ECONNRESET;
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goto err;
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}
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BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
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BUG_ON(!qp);
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@ -1819,7 +1820,8 @@ int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
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if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
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(conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
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abort_connection(ep, NULL, GFP_KERNEL);
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return -EINVAL;
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err = -EINVAL;
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goto err;
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}
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cm_id->add_ref(cm_id);
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@ -1836,8 +1838,6 @@ int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
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PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
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get_ep(&ep->com);
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/* bind QP to EP and move to RTS */
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attrs.mpa_attr = ep->mpa_attr;
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attrs.max_ird = ep->ird;
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@ -1855,30 +1855,31 @@ int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
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err = iwch_modify_qp(ep->com.qp->rhp,
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ep->com.qp, mask, &attrs, 1);
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if (err)
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goto err;
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goto err1;
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/* if needed, wait for wr_ack */
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if (iwch_rqes_posted(qp)) {
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wait_event(ep->com.waitq, ep->com.rpl_done);
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err = ep->com.rpl_err;
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if (err)
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goto err;
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goto err1;
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}
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err = send_mpa_reply(ep, conn_param->private_data,
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conn_param->private_data_len);
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if (err)
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goto err;
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goto err1;
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state_set(&ep->com, FPDU_MODE);
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established_upcall(ep);
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put_ep(&ep->com);
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return 0;
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err:
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err1:
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ep->com.cm_id = NULL;
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ep->com.qp = NULL;
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cm_id->rem_ref(cm_id);
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err:
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put_ep(&ep->com);
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return err;
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}
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@ -2097,14 +2098,17 @@ int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
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ep->com.state = CLOSING;
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start_ep_timer(ep);
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}
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set_bit(CLOSE_SENT, &ep->com.flags);
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break;
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case CLOSING:
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close = 1;
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if (abrupt) {
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stop_ep_timer(ep);
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ep->com.state = ABORTING;
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} else
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ep->com.state = MORIBUND;
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if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
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close = 1;
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if (abrupt) {
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stop_ep_timer(ep);
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ep->com.state = ABORTING;
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} else
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ep->com.state = MORIBUND;
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}
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break;
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case MORIBUND:
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case ABORTING:
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@ -145,9 +145,10 @@ enum iwch_ep_state {
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};
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enum iwch_ep_flags {
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PEER_ABORT_IN_PROGRESS = (1 << 0),
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ABORT_REQ_IN_PROGRESS = (1 << 1),
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RELEASE_RESOURCES = (1 << 2),
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PEER_ABORT_IN_PROGRESS = 0,
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ABORT_REQ_IN_PROGRESS = 1,
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RELEASE_RESOURCES = 2,
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CLOSE_SENT = 3,
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};
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struct iwch_ep_common {
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@ -162,7 +163,7 @@ struct iwch_ep_common {
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wait_queue_head_t waitq;
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int rpl_done;
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int rpl_err;
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u32 flags;
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unsigned long flags;
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};
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struct iwch_listen_ep {
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