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Use new struct mbufq instead of struct ifqueue to manage packet queues in

Browse Source 
IPv6 multicast code.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2015-02-19 01:21:23 +00:00
parent 058e08bea9
commit a99c84d4e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=278979
4 changed files with 48 additions and 60 deletions
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6
sys/netinet6/in6_mcast.c
View File

@ -479,7 +479,7 @@ in6_mc_get(struct ifnet *ifp, const struct in6_addr *group,
inm->in6m_ifma = ifma;
inm->in6m_refcount = 1;
inm->in6m_state = MLD_NOT_MEMBER;
IFQ_SET_MAXLEN(&inm->in6m_scq, MLD_MAX_STATE_CHANGES);
mbufq_init(&inm->in6m_scq, MLD_MAX_STATE_CHANGES);
inm->in6m_st[0].iss_fmode = MCAST_UNDEFINED;
inm->in6m_st[1].iss_fmode = MCAST_UNDEFINED;
@ -1074,7 +1074,7 @@ in6m_purge(struct in6_multi *inm)
inm->in6m_nsrc--;
}
/* Free state-change requests that might be queued. */
_IF_DRAIN(&inm->in6m_scq);
mbufq_drain(&inm->in6m_scq);
}
/*
@ -2804,7 +2804,7 @@ in6m_print(const struct in6_multi *inm)
inm->in6m_timer,
in6m_state_str(inm->in6m_state),
inm->in6m_refcount,
inm->in6m_scq.ifq_len);
mbufq_len(&inm->in6m_scq));
printf("mli %p nsrc %lu sctimer %u scrv %u\n",
inm->in6m_mli,
inm->in6m_nsrc,

2
sys/netinet6/in6_var.h
View File

@ -652,7 +652,7 @@ struct in6_multi {
struct ip6_msource_tree in6m_srcs; /* tree of sources */
u_long in6m_nsrc; /* # of tree entries */
struct ifqueue in6m_scq; /* queue of pending
struct mbufq in6m_scq; /* queue of pending
* state-change packets */
struct timeval in6m_lastgsrtv; /* last G-S-R query */
uint16_t in6m_sctimer; /* state-change timer */

98
sys/netinet6/mld6.c
View File

@ -106,7 +106,7 @@ static struct mld_ifinfo *
mli_alloc_locked(struct ifnet *);
static void mli_delete_locked(const struct ifnet *);
static void mld_dispatch_packet(struct mbuf *);
static void mld_dispatch_queue(struct ifqueue *, int);
static void mld_dispatch_queue(struct mbufq *, int);
static void mld_final_leave(struct in6_multi *, struct mld_ifinfo *);
static void mld_fasttimo_vnet(void);
static int mld_handle_state_change(struct in6_multi *,
@ -131,17 +131,17 @@ static void mld_v2_cancel_link_timers(struct mld_ifinfo *);
static void mld_v2_dispatch_general_query(struct mld_ifinfo *);
static struct mbuf *
mld_v2_encap_report(struct ifnet *, struct mbuf *);
static int mld_v2_enqueue_filter_change(struct ifqueue *,
static int mld_v2_enqueue_filter_change(struct mbufq *,
struct in6_multi *);
static int mld_v2_enqueue_group_record(struct ifqueue *,
static int mld_v2_enqueue_group_record(struct mbufq *,
struct in6_multi *, const int, const int, const int,
const int);
static int mld_v2_input_query(struct ifnet *, const struct ip6_hdr *,
struct mbuf *, const int, const int);
static int mld_v2_merge_state_changes(struct in6_multi *,
struct ifqueue *);
struct mbufq *);
static void mld_v2_process_group_timers(struct mld_ifinfo *,
struct ifqueue *, struct ifqueue *,
struct mbufq *, struct mbufq *,
struct in6_multi *, const int);
static int mld_v2_process_group_query(struct in6_multi *,
struct mld_ifinfo *mli, int, struct mbuf *, const int);
@ -406,15 +406,12 @@ sysctl_mld_ifinfo(SYSCTL_HANDLER_ARGS)
* VIMAGE: Assumes the vnet pointer has been set.
*/
static void
mld_dispatch_queue(struct ifqueue *ifq, int limit)
mld_dispatch_queue(struct mbufq *mq, int limit)
{
struct mbuf *m;
for (;;) {
_IF_DEQUEUE(ifq, m);
if (m == NULL)
break;
CTR3(KTR_MLD, "%s: dispatch %p from %p", __func__, ifq, m);
while ((m = mbufq_dequeue(mq)) != NULL) {
CTR3(KTR_MLD, "%s: dispatch %p from %p", __func__, mq, m);
mld_dispatch_packet(m);
if (--limit == 0)
break;
@ -499,13 +496,8 @@ mli_alloc_locked(/*const*/ struct ifnet *ifp)
mli->mli_qi = MLD_QI_INIT;
mli->mli_qri = MLD_QRI_INIT;
mli->mli_uri = MLD_URI_INIT;
SLIST_INIT(&mli->mli_relinmhead);
/*
* Responses to general queries are subject to bounds.
*/
IFQ_SET_MAXLEN(&mli->mli_gq, MLD_MAX_RESPONSE_PACKETS);
mbufq_init(&mli->mli_gq, MLD_MAX_RESPONSE_PACKETS);
LIST_INSERT_HEAD(&V_mli_head, mli, mli_link);
@ -598,7 +590,7 @@ mli_delete_locked(const struct ifnet *ifp)
/*
* Free deferred General Query responses.
*/
_IF_DRAIN(&mli->mli_gq);
mbufq_drain(&mli->mli_gq);
LIST_REMOVE(mli, mli_link);
@ -1326,8 +1318,8 @@ mld_fasttimo(void)
static void
mld_fasttimo_vnet(void)
{
struct ifqueue scq; /* State-change packets */
struct ifqueue qrq; /* Query response packets */
struct mbufq scq; /* State-change packets */
struct mbufq qrq; /* Query response packets */
struct ifnet *ifp;
struct mld_ifinfo *mli;
struct ifmultiaddr *ifma;
@ -1386,12 +1378,8 @@ mld_fasttimo_vnet(void)
if (mli->mli_version == MLD_VERSION_2) {
uri_fasthz = MLD_RANDOM_DELAY(mli->mli_uri *
PR_FASTHZ);
memset(&qrq, 0, sizeof(struct ifqueue));
IFQ_SET_MAXLEN(&qrq, MLD_MAX_G_GS_PACKETS);
memset(&scq, 0, sizeof(struct ifqueue));
IFQ_SET_MAXLEN(&scq, MLD_MAX_STATE_CHANGE_PACKETS);
mbufq_init(&qrq, MLD_MAX_G_GS_PACKETS);
mbufq_init(&scq, MLD_MAX_STATE_CHANGE_PACKETS);
}
IF_ADDR_RLOCK(ifp);
@ -1503,7 +1491,7 @@ mld_v1_process_group_timer(struct mld_ifinfo *mli, struct in6_multi *inm)
*/
static void
mld_v2_process_group_timers(struct mld_ifinfo *mli,
struct ifqueue *qrq, struct ifqueue *scq,
struct mbufq *qrq, struct mbufq *scq,
struct in6_multi *inm, const int uri_fasthz)
{
int query_response_timer_expired;
@ -1711,7 +1699,7 @@ mld_v2_cancel_link_timers(struct mld_ifinfo *mli)
/*
* Free any pending MLDv2 state-change records.
*/
_IF_DRAIN(&inm->in6m_scq);
mbufq_drain(&inm->in6m_scq);
break;
}
}
@ -1950,7 +1938,7 @@ mld_initial_join(struct in6_multi *inm, struct mld_ifinfo *mli,
const int delay)
{
struct ifnet *ifp;
struct ifqueue *ifq;
struct mbufq *mq;
int error, retval, syncstates;
int odelay;
#ifdef KTR
@ -2037,9 +2025,9 @@ mld_initial_join(struct in6_multi *inm, struct mld_ifinfo *mli,
* Don't kick the timers if there is nothing to do,
* or if an error occurred.
*/
ifq = &inm->in6m_scq;
_IF_DRAIN(ifq);
retval = mld_v2_enqueue_group_record(ifq, inm, 1,
mq = &inm->in6m_scq;
mbufq_drain(mq);
retval = mld_v2_enqueue_group_record(mq, inm, 1,
0, 0, (mli->mli_flags & MLIF_USEALLOW));
CTR2(KTR_MLD, "%s: enqueue record = %d",
__func__, retval);
@ -2131,7 +2119,7 @@ mld_handle_state_change(struct in6_multi *inm, struct mld_ifinfo *mli)
return (0);
}
_IF_DRAIN(&inm->in6m_scq);
mbufq_drain(&inm->in6m_scq);
retval = mld_v2_enqueue_group_record(&inm->in6m_scq, inm, 1, 0, 0,
(mli->mli_flags & MLIF_USEALLOW));
@ -2204,7 +2192,7 @@ mld_final_leave(struct in6_multi *inm, struct mld_ifinfo *mli)
* TO_IN {} to be sent on the next fast timeout,
* giving us an opportunity to merge reports.
*/
_IF_DRAIN(&inm->in6m_scq);
mbufq_drain(&inm->in6m_scq);
inm->in6m_timer = 0;
inm->in6m_scrv = mli->mli_rv;
CTR4(KTR_MLD, "%s: Leaving %s/%s with %d "
@ -2280,7 +2268,7 @@ mld_final_leave(struct in6_multi *inm, struct mld_ifinfo *mli)
* no record(s) were appended.
*/
static int
mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
mld_v2_enqueue_group_record(struct mbufq *mq, struct in6_multi *inm,
const int is_state_change, const int is_group_query,
const int is_source_query, const int use_block_allow)
{
@ -2395,7 +2383,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
* Generate the filter list changes using a separate function.
*/
if (is_filter_list_change)
return (mld_v2_enqueue_filter_change(ifq, inm));
return (mld_v2_enqueue_filter_change(mq, inm));
if (type == MLD_DO_NOTHING) {
CTR3(KTR_MLD, "%s: nothing to do for %s/%s",
@ -2426,7 +2414,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
* Note: Group records for G/GSR query responses MUST be sent
* in their own packet.
*/
m0 = ifq->ifq_tail;
m0 = mbufq_last(mq);
if (!is_group_query &&
m0 != NULL &&
(m0->m_pkthdr.PH_vt.vt_nrecs + 1 <= MLD_V2_REPORT_MAXRECS) &&
@ -2438,7 +2426,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
m = m0;
CTR1(KTR_MLD, "%s: use existing packet", __func__);
} else {
if (_IF_QFULL(ifq)) {
if (mbufq_full(mq)) {
CTR1(KTR_MLD, "%s: outbound queue full", __func__);
return (-ENOMEM);
}
@ -2551,7 +2539,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
if (m != m0) {
CTR1(KTR_MLD, "%s: enqueueing first packet", __func__);
m->m_pkthdr.PH_vt.vt_nrecs = 1;
_IF_ENQUEUE(ifq, m);
mbufq_enqueue(mq, m);
} else
m->m_pkthdr.PH_vt.vt_nrecs++;
@ -2567,7 +2555,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
* Always try for a cluster first.
*/
while (nims != NULL) {
if (_IF_QFULL(ifq)) {
if (mbufq_full(mq)) {
CTR1(KTR_MLD, "%s: outbound queue full", __func__);
return (-ENOMEM);
}
@ -2626,7 +2614,7 @@ mld_v2_enqueue_group_record(struct ifqueue *ifq, struct in6_multi *inm,
nbytes += (msrcs * sizeof(struct in6_addr));
CTR1(KTR_MLD, "%s: enqueueing next packet", __func__);
_IF_ENQUEUE(ifq, m);
mbufq_enqueue(mq, m);
}
return (nbytes);
@ -2666,7 +2654,7 @@ typedef enum {
* no record(s) were appended.
*/
static int
mld_v2_enqueue_filter_change(struct ifqueue *ifq, struct in6_multi *inm)
mld_v2_enqueue_filter_change(struct mbufq *mq, struct in6_multi *inm)
{
static const int MINRECLEN =
sizeof(struct mldv2_record) + sizeof(struct in6_addr);
@ -2712,7 +2700,7 @@ mld_v2_enqueue_filter_change(struct ifqueue *ifq, struct in6_multi *inm)
*/
while (drt != REC_FULL) {
do {
m0 = ifq->ifq_tail;
m0 = mbufq_last(mq);
if (m0 != NULL &&
(m0->m_pkthdr.PH_vt.vt_nrecs + 1 <=
MLD_V2_REPORT_MAXRECS) &&
@ -2856,7 +2844,7 @@ mld_v2_enqueue_filter_change(struct ifqueue *ifq, struct in6_multi *inm)
*/
m->m_pkthdr.PH_vt.vt_nrecs++;
if (m != m0)
_IF_ENQUEUE(ifq, m);
mbufq_enqueue(mq, m);
nbytes += npbytes;
} while (nims != NULL);
drt |= crt;
@ -2870,9 +2858,9 @@ mld_v2_enqueue_filter_change(struct ifqueue *ifq, struct in6_multi *inm)
}
static int
mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
mld_v2_merge_state_changes(struct in6_multi *inm, struct mbufq *scq)
{
struct ifqueue *gq;
struct mbufq *gq;
struct mbuf *m; /* pending state-change */
struct mbuf *m0; /* copy of pending state-change */
struct mbuf *mt; /* last state-change in packet */
@ -2895,13 +2883,13 @@ mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
gq = &inm->in6m_scq;
#ifdef KTR
if (gq->ifq_head == NULL) {
if (mbufq_first(gq) == NULL) {
CTR2(KTR_MLD, "%s: WARNING: queue for inm %p is empty",
__func__, inm);
}
#endif
m = gq->ifq_head;
m = mbufq_first(gq);
while (m != NULL) {
/*
* Only merge the report into the current packet if
@ -2912,7 +2900,7 @@ mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
* allocated clusters.
*/
domerge = 0;
mt = ifscq->ifq_tail;
mt = mbufq_last(scq);
if (mt != NULL) {
recslen = m_length(m, NULL);
@ -2924,7 +2912,7 @@ mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
domerge = 1;
}
if (!domerge && _IF_QFULL(gq)) {
if (!domerge && mbufq_full(gq)) {
CTR2(KTR_MLD,
"%s: outbound queue full, skipping whole packet %p",
__func__, m);
@ -2937,7 +2925,7 @@ mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
if (!docopy) {
CTR2(KTR_MLD, "%s: dequeueing %p", __func__, m);
_IF_DEQUEUE(gq, m0);
m0 = mbufq_dequeue(gq);
m = m0->m_nextpkt;
} else {
CTR2(KTR_MLD, "%s: copying %p", __func__, m);
@ -2949,9 +2937,9 @@ mld_v2_merge_state_changes(struct in6_multi *inm, struct ifqueue *ifscq)
}
if (!domerge) {
CTR3(KTR_MLD, "%s: queueing %p to ifscq %p)",
__func__, m0, ifscq);
_IF_ENQUEUE(ifscq, m0);
CTR3(KTR_MLD, "%s: queueing %p to scq %p)",
__func__, m0, scq);
mbufq_enqueue(scq, m0);
} else {
struct mbuf *mtl; /* last mbuf of packet mt */
@ -3028,7 +3016,7 @@ mld_v2_dispatch_general_query(struct mld_ifinfo *mli)
/*
* Slew transmission of bursts over 500ms intervals.
*/
if (mli->mli_gq.ifq_head != NULL) {
if (mbufq_first(&mli->mli_gq) != NULL) {
mli->mli_v2_timer = 1 + MLD_RANDOM_DELAY(
MLD_RESPONSE_BURST_INTERVAL);
V_interface_timers_running6 = 1;

2
sys/netinet6/mld6_var.h
View File

@ -52,7 +52,7 @@ struct mld_ifinfo {
uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
SLIST_HEAD(,in6_multi) mli_relinmhead; /* released groups */
struct ifqueue mli_gq; /* queue of general query responses */
struct mbufq mli_gq; /* queue of general query responses */
};
#define MLIF_SILENT 0x00000001 /* Do not use MLD on this ifp */
#define MLIF_USEALLOW 0x00000002 /* Use ALLOW/BLOCK for joins/leaves */