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net80211: free node reference in the ieee80211_parent_xmitpkt() when error happened.

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Move error handling into ieee80211_parent_xmitpkt() instead of spreading it
between functions.

Submitted by:	<s3erios@gmail.com>
Differential Revision:	https://reviews.freebsd.org/D3772
This commit is contained in:
adrian 2015-10-12 04:30:38 +00:00
parent 3051919e5d
commit 5a44e8c44b
8 changed files with 19 additions and 39 deletions
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4
sys/dev/iwn/if_iwn.c
View File

@ -4950,9 +4950,7 @@ iwn_transmit(struct ieee80211com *ic, struct mbuf *m)
}
error = iwn_tx_data(sc, m, ni);
if (error) {
if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
} else
if (!error)
sc->sc_tx_timer = 5;
IWN_UNLOCK(sc);
return (error);

13
sys/net80211/ieee80211_freebsd.c
View File

@ -529,9 +529,6 @@ ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs)
/*
* Transmit a frame to the parent interface.
*
* TODO: if the transmission fails, make sure the parent node is freed
* (the callers will first need modifying.)
*/
int
ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
@ -544,8 +541,16 @@ ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
*/
IEEE80211_TX_LOCK_ASSERT(ic);
error = ic->ic_transmit(ic, m);
if (error)
if (error) {
struct ieee80211_node *ni;
ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
/* XXX number of fragments */
if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
ieee80211_free_node(ni);
ieee80211_free_mbuf(m);
}
return (error);
}

5
sys/net80211/ieee80211_hostap.c
View File

@ -2327,12 +2327,11 @@ ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
/*
* Do the right thing; if it's an encap'ed frame then
* call ieee80211_parent_xmitpkt() (and free the ref) else
* call ieee80211_parent_xmitpkt() else
* call ieee80211_vap_xmitpkt().
*/
if (m->m_flags & M_ENCAP) {
if (ieee80211_parent_xmitpkt(ic, m) != 0)
ieee80211_free_node(ni);
(void) ieee80211_parent_xmitpkt(ic, m);
} else {
(void) ieee80211_vap_xmitpkt(vap, m);
}

6
sys/net80211/ieee80211_mesh.c
View File

@ -1239,12 +1239,8 @@ mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
IEEE80211_TX_LOCK(ic);
err = ieee80211_parent_xmitpkt(ic, mcopy);
IEEE80211_TX_UNLOCK(ic);
if (err != 0) {
/* NB: IFQ_HANDOFF reclaims mbuf */
ieee80211_free_node(ni);
} else {
if (!err)
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
}
}
static struct mbuf *

9
sys/net80211/ieee80211_output.c
View File

@ -132,7 +132,7 @@ ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
{
struct ieee80211com *ic = vap->iv_ic;
struct ifnet *ifp = vap->iv_ifp;
int error, len, mcast;
int len, mcast;
if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
(m->m_flags & M_PWR_SAV) == 0) {
@ -264,18 +264,13 @@ ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
return (ENOBUFS);
}
}
error = ieee80211_parent_xmitpkt(ic, m);
(void) ieee80211_parent_xmitpkt(ic, m);
/*
* Unlock at this point - no need to hold it across
* ieee80211_free_node() (ie, the comlock)
*/
IEEE80211_TX_UNLOCK(ic);
if (error != 0) {
/* NB: IFQ_HANDOFF reclaims mbuf */
ieee80211_free_node(ni);
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
}
ic->ic_lastdata = ticks;
return (0);

7
sys/net80211/ieee80211_power.c
View File

@ -457,12 +457,7 @@ pwrsave_flushq(struct ieee80211_node *ni)
KASSERT((m->m_flags & M_ENCAP),
("%s: parentq with non-M_ENCAP frame!\n",
__func__));
/*
* For encaped frames, we need to free the node
* reference upon failure.
*/
if (ieee80211_parent_xmitpkt(ic, m) != 0)
ieee80211_free_node(ni);
(void) ieee80211_parent_xmitpkt(ic, m);
}
/* VAP frames, aren't encapsulated */

8
sys/net80211/ieee80211_superg.c
View File

@ -475,13 +475,9 @@ ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
if (m != NULL) {
struct ifnet *ifp = vap->iv_ifp;
error = ieee80211_parent_xmitpkt(ic, m);;
if (error != 0) {
/* NB: IFQ_HANDOFF reclaims mbuf */
ieee80211_free_node(ni);
} else {
error = ieee80211_parent_xmitpkt(ic, m);
if (!error)
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
}
} else
ieee80211_free_node(ni);
}

6
sys/net80211/ieee80211_wds.c
View File

@ -298,11 +298,7 @@ ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
mcopy->m_pkthdr.rcvif = (void *) ni;
err = ieee80211_parent_xmitpkt(ic, mcopy);
if (err) {
/* NB: IFQ_HANDOFF reclaims mbuf */
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
ieee80211_free_node(ni);
} else {
if (!err) {
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
if_inc_counter(ifp, IFCOUNTER_OBYTES,