sysmobts: Clarify msgb ownership / fix memory leaks
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e28a20a2d9
commit
21b020b336
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@ -390,6 +390,7 @@ static int ph_data_req(struct gsm_bts_trx *trx, struct msgb *msg,
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LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d "
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"chan_nr %d link_id %d\n", l1sap->oph.primitive,
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l1sap->oph.operation, chan_nr, link_id);
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msgb_free(l1msg);
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return -EINVAL;
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}
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@ -412,13 +413,10 @@ static int ph_data_req(struct gsm_bts_trx *trx, struct msgb *msg,
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empty_req_from_l1sap(l1p, fl1, u8Tn, u32Fn, sapi, subCh, u8BlockNbr);
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}
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/* free the msgb holding the L1SAP primitive */
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msgb_free(msg);
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/* send message to DSP's queue */
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if (osmo_wqueue_enqueue(&fl1->write_q[MQ_L1_WRITE], l1msg) != 0) {
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LOGP(DL1P, LOGL_ERROR, "MQ_L1_WRITE queue full. Dropping msg.\n");
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msgb_free(msg);
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msgb_free(l1msg);
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}
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return 0;
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@ -490,7 +488,6 @@ static int ph_tch_req(struct gsm_bts_trx *trx, struct msgb *msg,
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/* send message to DSP's queue */
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osmo_wqueue_enqueue(&fl1->write_q[MQ_L1_WRITE], nmsg);
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msgb_free(msg);
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return 0;
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}
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@ -539,7 +536,6 @@ static int mph_info_req(struct gsm_bts_trx *trx, struct msgb *msg,
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l1if_rsl_deact_sacch(lchan);
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else
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l1if_rsl_chan_rel(lchan);
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msgb_free(msg);
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break;
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default:
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LOGP(DL1C, LOGL_NOTICE, "unknown MPH-INFO.req %d\n",
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@ -556,6 +552,8 @@ int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
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struct msgb *msg = l1sap->oph.msg;
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int rc = 0;
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/* called functions MUST NOT take ownership of msgb, as it is
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* free()d below */
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switch (OSMO_PRIM_HDR(&l1sap->oph)) {
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case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST):
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rc = ph_data_req(trx, msg, l1sap);
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@ -572,13 +570,14 @@ int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
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rc = -EINVAL;
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}
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if (rc)
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msgb_free(msg);
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msgb_free(msg);
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return rc;
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}
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static int handle_mph_time_ind(struct femtol1_hdl *fl1,
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GsmL1_MphTimeInd_t *time_ind)
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GsmL1_MphTimeInd_t *time_ind,
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struct msgb *msg)
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{
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struct gsm_bts_trx *trx = fl1->priv;
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struct gsm_bts *bts = trx->bts;
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@ -601,6 +600,8 @@ static int handle_mph_time_ind(struct femtol1_hdl *fl1,
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l1sap.u.info.type = PRIM_INFO_TIME;
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l1sap.u.info.u.time_ind.fn = fn;
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msgb_free(msg);
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return l1sap_up(trx, &l1sap);
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}
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@ -725,6 +726,8 @@ static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1,
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link_id = 0x40;
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else
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link_id = 0;
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/* recycle the msgb and use it for the L1 primitive,
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* which means that we (or our caller) must not free it */
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rc = msgb_trim(l1p_msg, sizeof(*l1sap));
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if (rc < 0)
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MSGB_ABORT(l1p_msg, "No room for primitive\n");
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@ -791,6 +794,8 @@ tx:
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msgb_free(resp_msg);
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}
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/* free the msgb, as we have not handed it to l1sap and thus
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* need to release its memory */
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msgb_free(l1p_msg);
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return 0;
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@ -821,6 +826,8 @@ static int process_meas_res(struct gsm_bts_trx *trx, uint8_t chan_nr,
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l1sap.u.info.u.meas_ind.ber10k = (unsigned int) (m->fBer * 100);
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l1sap.u.info.u.meas_ind.inv_rssi = (uint8_t) (m->fRssi * -1);
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/* l1sap wants to take msgb ownership. However, as there is no
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* msg, it will msgb_free(l1sap.oph.msg == NULL) */
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return l1sap_up(trx, &l1sap);
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}
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@ -955,30 +962,28 @@ static int l1if_handle_ind(struct femtol1_hdl *fl1, struct msgb *msg)
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GsmL1_Prim_t *l1p = msgb_l1prim(msg);
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int rc = 0;
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/* all the below called functions must take ownership of the msgb */
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switch (l1p->id) {
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case GsmL1_PrimId_MphTimeInd:
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rc = handle_mph_time_ind(fl1, &l1p->u.mphTimeInd);
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rc = handle_mph_time_ind(fl1, &l1p->u.mphTimeInd, msg);
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break;
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case GsmL1_PrimId_MphSyncInd:
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break;
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case GsmL1_PrimId_PhConnectInd:
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break;
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case GsmL1_PrimId_PhReadyToSendInd:
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return handle_ph_readytosend_ind(fl1, &l1p->u.phReadyToSendInd,
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rc = handle_ph_readytosend_ind(fl1, &l1p->u.phReadyToSendInd,
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msg);
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case GsmL1_PrimId_PhDataInd:
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return handle_ph_data_ind(fl1, &l1p->u.phDataInd, msg);
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rc = handle_ph_data_ind(fl1, &l1p->u.phDataInd, msg);
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break;
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case GsmL1_PrimId_PhRaInd:
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return handle_ph_ra_ind(fl1, &l1p->u.phRaInd, msg);
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rc = handle_ph_ra_ind(fl1, &l1p->u.phRaInd, msg);
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break;
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default:
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break;
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}
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/* Special return value '1' means: do not free */
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if (rc != 1)
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msgb_free(msg);
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return rc;
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}
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@ -1012,9 +1017,11 @@ int l1if_handle_l1prim(int wq, struct femtol1_hdl *fl1h, struct msgb *msg)
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llist_for_each_entry(wlc, &fl1h->wlc_list, list) {
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if (is_prim_compat(l1p, wlc)) {
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llist_del(&wlc->list);
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if (wlc->cb)
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if (wlc->cb) {
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/* call-back function must take
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* ownership of msgb */
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rc = wlc->cb(fl1h->priv, msg, wlc->cb_data);
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else {
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} else {
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rc = 0;
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msgb_free(msg);
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}
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@ -1042,9 +1049,11 @@ int l1if_handle_sysprim(struct femtol1_hdl *fl1h, struct msgb *msg)
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* sending the same primitive */
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if (wlc->is_sys_prim && sysp->id == wlc->conf_prim_id) {
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llist_del(&wlc->list);
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if (wlc->cb)
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if (wlc->cb) {
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/* call-back function must take
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* ownership of msgb */
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rc = wlc->cb(fl1h->priv, msg, wlc->cb_data);
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else {
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} else {
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rc = 0;
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msgb_free(msg);
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}
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