cregit-Linux how code gets into the kernel

Release 4.11 net/ipv4/igmp.c

Directory: net/ipv4
/*
 *      Linux NET3:     Internet Group Management Protocol  [IGMP]
 *
 *      This code implements the IGMP protocol as defined in RFC1112. There has
 *      been a further revision of this protocol since which is now supported.
 *
 *      If you have trouble with this module be careful what gcc you have used,
 *      the older version didn't come out right using gcc 2.5.8, the newer one
 *      seems to fall out with gcc 2.6.2.
 *
 *      Authors:
 *              Alan Cox <alan@lxorguk.ukuu.org.uk>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 *      Fixes:
 *
 *              Alan Cox        :       Added lots of __inline__ to optimise
 *                                      the memory usage of all the tiny little
 *                                      functions.
 *              Alan Cox        :       Dumped the header building experiment.
 *              Alan Cox        :       Minor tweaks ready for multicast routing
 *                                      and extended IGMP protocol.
 *              Alan Cox        :       Removed a load of inline directives. Gcc 2.5.8
 *                                      writes utterly bogus code otherwise (sigh)
 *                                      fixed IGMP loopback to behave in the manner
 *                                      desired by mrouted, fixed the fact it has been
 *                                      broken since 1.3.6 and cleaned up a few minor
 *                                      points.
 *
 *              Chih-Jen Chang  :       Tried to revise IGMP to Version 2
 *              Tsu-Sheng Tsao          E-mail: chihjenc@scf.usc.edu and tsusheng@scf.usc.edu
 *                                      The enhancements are mainly based on Steve Deering's
 *                                      ipmulti-3.5 source code.
 *              Chih-Jen Chang  :       Added the igmp_get_mrouter_info and
 *              Tsu-Sheng Tsao          igmp_set_mrouter_info to keep track of
 *                                      the mrouted version on that device.
 *              Chih-Jen Chang  :       Added the max_resp_time parameter to
 *              Tsu-Sheng Tsao          igmp_heard_query(). Using this parameter
 *                                      to identify the multicast router version
 *                                      and do what the IGMP version 2 specified.
 *              Chih-Jen Chang  :       Added a timer to revert to IGMP V2 router
 *              Tsu-Sheng Tsao          if the specified time expired.
 *              Alan Cox        :       Stop IGMP from 0.0.0.0 being accepted.
 *              Alan Cox        :       Use GFP_ATOMIC in the right places.
 *              Christian Daudt :       igmp timer wasn't set for local group
 *                                      memberships but was being deleted,
 *                                      which caused a "del_timer() called
 *                                      from %p with timer not initialized\n"
 *                                      message (960131).
 *              Christian Daudt :       removed del_timer from
 *                                      igmp_timer_expire function (960205).
 *             Christian Daudt :       igmp_heard_report now only calls
 *                                     igmp_timer_expire if tm->running is
 *                                     true (960216).
 *              Malcolm Beattie :       ttl comparison wrong in igmp_rcv made
 *                                      igmp_heard_query never trigger. Expiry
 *                                      miscalculation fixed in igmp_heard_query
 *                                      and random() made to return unsigned to
 *                                      prevent negative expiry times.
 *              Alexey Kuznetsov:       Wrong group leaving behaviour, backport
 *                                      fix from pending 2.1.x patches.
 *              Alan Cox:               Forget to enable FDDI support earlier.
 *              Alexey Kuznetsov:       Fixed leaving groups on device down.
 *              Alexey Kuznetsov:       Accordance to igmp-v2-06 draft.
 *              David L Stevens:        IGMPv3 support, with help from
 *                                      Vinay Kulkarni
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/times.h>
#include <linux/pkt_sched.h>

#include <net/net_namespace.h>
#include <net/arp.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <net/route.h>
#include <net/sock.h>
#include <net/checksum.h>
#include <net/inet_common.h>
#include <linux/netfilter_ipv4.h>
#ifdef CONFIG_IP_MROUTE
#include <linux/mroute.h>
#endif
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif

#ifdef CONFIG_IP_MULTICAST
/* Parameter names and values are taken from igmp-v2-06 draft */


#define IGMP_V1_ROUTER_PRESENT_TIMEOUT		(400*HZ)

#define IGMP_V2_ROUTER_PRESENT_TIMEOUT		(400*HZ)

#define IGMP_V2_UNSOLICITED_REPORT_INTERVAL	(10*HZ)

#define IGMP_V3_UNSOLICITED_REPORT_INTERVAL	(1*HZ)

#define IGMP_QUERY_RESPONSE_INTERVAL		(10*HZ)

#define IGMP_QUERY_ROBUSTNESS_VARIABLE		2



#define IGMP_INITIAL_REPORT_DELAY		(1)

/* IGMP_INITIAL_REPORT_DELAY is not from IGMP specs!
 * IGMP specs require to report membership immediately after
 * joining a group, but we delay the first report by a
 * small interval. It seems more natural and still does not
 * contradict to specs provided this delay is small enough.
 */


#define IGMP_V1_SEEN(in_dev) \
	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 1 || \
         IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 1 || \
         ((in_dev)->mr_v1_seen && \
          time_before(jiffies, (in_dev)->mr_v1_seen)))

#define IGMP_V2_SEEN(in_dev) \
	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 2 || \
         IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 2 || \
         ((in_dev)->mr_v2_seen && \
          time_before(jiffies, (in_dev)->mr_v2_seen)))


static int unsolicited_report_interval(struct in_device *in_dev) { int interval_ms, interval_jiffies; if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) interval_ms = IN_DEV_CONF_GET( in_dev, IGMPV2_UNSOLICITED_REPORT_INTERVAL); else /* v3 */ interval_ms = IN_DEV_CONF_GET( in_dev, IGMPV3_UNSOLICITED_REPORT_INTERVAL); interval_jiffies = msecs_to_jiffies(interval_ms); /* _timer functions can't handle a delay of 0 jiffies so ensure * we always return a positive value. */ if (interval_jiffies <= 0) interval_jiffies = 1; return interval_jiffies; }

Contributors

PersonTokensPropCommitsCommitProp
William Manley69100.00%2100.00%
Total69100.00%2100.00%

static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im); static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im); static void igmpv3_clear_delrec(struct in_device *in_dev); static int sf_setstate(struct ip_mc_list *pmc); static void sf_markstate(struct ip_mc_list *pmc); #endif static void ip_mc_clear_src(struct ip_mc_list *pmc); static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode, int sfcount, __be32 *psfsrc, int delta);
static void ip_ma_put(struct ip_mc_list *im) { if (atomic_dec_and_test(&im->refcnt)) { in_dev_put(im->interface); kfree_rcu(im, rcu); } }

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PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3491.89%133.33%
Lai Jiangshan25.41%133.33%
Eric Dumazet12.70%133.33%
Total37100.00%3100.00%

#define for_each_pmc_rcu(in_dev, pmc) \ for (pmc = rcu_dereference(in_dev->mc_list); \ pmc != NULL; \ pmc = rcu_dereference(pmc->next_rcu)) #define for_each_pmc_rtnl(in_dev, pmc) \ for (pmc = rtnl_dereference(in_dev->mc_list); \ pmc != NULL; \ pmc = rtnl_dereference(pmc->next_rcu)) #ifdef CONFIG_IP_MULTICAST /* * Timer management */
static void igmp_stop_timer(struct ip_mc_list *im) { spin_lock_bh(&im->lock); if (del_timer(&im->timer)) atomic_dec(&im->refcnt); im->tm_running = 0; im->reporter = 0; im->unsolicit_count = 0; spin_unlock_bh(&im->lock); }

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PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)63100.00%3100.00%
Total63100.00%3100.00%

/* It must be called with locked im->lock */
static void igmp_start_timer(struct ip_mc_list *im, int max_delay) { int tv = prandom_u32() % max_delay; im->tm_running = 1; if (!mod_timer(&im->timer, jiffies+tv+2)) atomic_inc(&im->refcnt); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5298.11%685.71%
Aruna-Hewapathirane11.89%114.29%
Total53100.00%7100.00%


static void igmp_gq_start_timer(struct in_device *in_dev) { int tv = prandom_u32() % in_dev->mr_maxdelay; unsigned long exp = jiffies + tv + 2; if (in_dev->mr_gq_running && time_after_eq(exp, (in_dev->mr_gq_timer).expires)) return; in_dev->mr_gq_running = 1; if (!mod_timer(&in_dev->mr_gq_timer, exp)) in_dev_hold(in_dev); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens4357.33%250.00%
Michal Tesar3141.33%125.00%
Aruna-Hewapathirane11.33%125.00%
Total75100.00%4100.00%


static void igmp_ifc_start_timer(struct in_device *in_dev, int delay) { int tv = prandom_u32() % delay; if (!mod_timer(&in_dev->mr_ifc_timer, jiffies+tv+2)) in_dev_hold(in_dev); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens4397.73%266.67%
Aruna-Hewapathirane12.27%133.33%
Total44100.00%3100.00%


static void igmp_mod_timer(struct ip_mc_list *im, int max_delay) { spin_lock_bh(&im->lock); im->unsolicit_count = 0; if (del_timer(&im->timer)) { if ((long)(im->timer.expires-jiffies) < max_delay) { add_timer(&im->timer); im->tm_running = 1; spin_unlock_bh(&im->lock); return; } atomic_dec(&im->refcnt); } igmp_start_timer(im, max_delay); spin_unlock_bh(&im->lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)105100.00%3100.00%
Total105100.00%3100.00%

/* * Send an IGMP report. */ #define IGMP_SIZE (sizeof(struct igmphdr)+sizeof(struct iphdr)+4)
static int is_in(struct ip_mc_list *pmc, struct ip_sf_list *psf, int type, int gdeleted, int sdeleted) { switch (type) { case IGMPV3_MODE_IS_INCLUDE: case IGMPV3_MODE_IS_EXCLUDE: if (gdeleted || sdeleted) return 0; if (!(pmc->gsquery && !psf->sf_gsresp)) { if (pmc->sfmode == MCAST_INCLUDE) return 1; /* don't include if this source is excluded * in all filters */ if (psf->sf_count[MCAST_INCLUDE]) return type == IGMPV3_MODE_IS_INCLUDE; return pmc->sfcount[MCAST_EXCLUDE] == psf->sf_count[MCAST_EXCLUDE]; } return 0; case IGMPV3_CHANGE_TO_INCLUDE: if (gdeleted || sdeleted) return 0; return psf->sf_count[MCAST_INCLUDE] != 0; case IGMPV3_CHANGE_TO_EXCLUDE: if (gdeleted || sdeleted) return 0; if (pmc->sfcount[MCAST_EXCLUDE] == 0 || psf->sf_count[MCAST_INCLUDE]) return 0; return pmc->sfcount[MCAST_EXCLUDE] == psf->sf_count[MCAST_EXCLUDE]; case IGMPV3_ALLOW_NEW_SOURCES: if (gdeleted || !psf->sf_crcount) return 0; return (pmc->sfmode == MCAST_INCLUDE) ^ sdeleted; case IGMPV3_BLOCK_OLD_SOURCES: if (pmc->sfmode == MCAST_INCLUDE) return gdeleted || (psf->sf_crcount && sdeleted); return psf->sf_crcount && !gdeleted && !sdeleted; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens22293.28%233.33%
Linus Torvalds (pre-git)145.88%233.33%
David S. Miller20.84%233.33%
Total238100.00%6100.00%


static int igmp_scount(struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted) { struct ip_sf_list *psf; int scount = 0; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (!is_in(pmc, psf, type, gdeleted, sdeleted)) continue; scount++; } return scount; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens71100.00%1100.00%
Total71100.00%1100.00%


static struct sk_buff *igmpv3_newpack(struct net_device *dev, unsigned int mtu) { struct sk_buff *skb; struct rtable *rt; struct iphdr *pip; struct igmpv3_report *pig; struct net *net = dev_net(dev); struct flowi4 fl4; int hlen = LL_RESERVED_SPACE(dev); int tlen = dev->needed_tailroom; unsigned int size = mtu; while (1) { skb = alloc_skb(size + hlen + tlen, GFP_ATOMIC | __GFP_NOWARN); if (skb) break; size >>= 1; if (size < 256) return NULL; } skb->priority = TC_PRIO_CONTROL; rt = ip_route_output_ports(net, &fl4, NULL, IGMPV3_ALL_MCR, 0, 0, 0, IPPROTO_IGMP, 0, dev->ifindex); if (IS_ERR(rt)) { kfree_skb(skb); return NULL; } skb_dst_set(skb, &rt->dst); skb->dev = dev; skb_reserve(skb, hlen); skb_tailroom_reserve(skb, mtu, tlen); skb_reset_network_header(skb); pip = ip_hdr(skb); skb_put(skb, sizeof(struct iphdr) + 4); pip->version = 4; pip->ihl = (sizeof(struct iphdr)+4)>>2; pip->tos = 0xc0; pip->frag_off = htons(IP_DF); pip->ttl = 1; pip->daddr = fl4.daddr; pip->saddr = fl4.saddr; pip->protocol = IPPROTO_IGMP; pip->tot_len = 0; /* filled in later */ ip_select_ident(net, skb, NULL); ((u8 *)&pip[1])[0] = IPOPT_RA; ((u8 *)&pip[1])[1] = 4; ((u8 *)&pip[1])[2] = 0; ((u8 *)&pip[1])[3] = 0; skb->transport_header = skb->network_header + sizeof(struct iphdr) + 4; skb_put(skb, sizeof(*pig)); pig = igmpv3_report_hdr(skb); pig->type = IGMPV3_HOST_MEMBERSHIP_REPORT; pig->resv1 = 0; pig->csum = 0; pig->resv2 = 0; pig->ngrec = 0; return skb; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)17339.77%824.24%
David L Stevens9922.76%13.03%
David S. Miller4710.80%618.18%
Arnaldo Carvalho de Melo317.13%515.15%
Eric Dumazet235.29%26.06%
Herbert Xu184.14%13.03%
Daniel Borkmann132.99%13.03%
Daniel Lezcano112.53%13.03%
Hannes Frederic Sowa81.84%26.06%
Benjamin Poirier61.38%13.03%
Mika Kukkonen20.46%13.03%
Hideaki Yoshifuji / 吉藤英明10.23%13.03%
Linus Torvalds10.23%13.03%
Ansis Atteka10.23%13.03%
Denis V. Lunev10.23%13.03%
Total435100.00%33100.00%


static int igmpv3_sendpack(struct sk_buff *skb) { struct igmphdr *pig = igmp_hdr(skb); const int igmplen = skb_tail_pointer(skb) - skb_transport_header(skb); pig->csum = ip_compute_csum(igmp_hdr(skb), igmplen); return ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens2231.88%19.09%
Eric W. Biedermann1420.29%218.18%
Arnaldo Carvalho de Melo1318.84%218.18%
Linus Torvalds (pre-git)1318.84%436.36%
Simon Horman68.70%19.09%
Herbert Xu11.45%19.09%
Total69100.00%11100.00%


static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel) { return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc, type, gdel, sdel); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens3075.00%133.33%
Linus Torvalds (pre-git)1025.00%266.67%
Total40100.00%3100.00%


static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc, int type, struct igmpv3_grec **ppgr) { struct net_device *dev = pmc->interface->dev; struct igmpv3_report *pih; struct igmpv3_grec *pgr; if (!skb) skb = igmpv3_newpack(dev, dev->mtu); if (!skb) return NULL; pgr = (struct igmpv3_grec *)skb_put(skb, sizeof(struct igmpv3_grec)); pgr->grec_type = type; pgr->grec_auxwords = 0; pgr->grec_nsrcs = 0; pgr->grec_mca = pmc->multiaddr; pih = igmpv3_report_hdr(skb); pih->ngrec = htons(ntohs(pih->ngrec)+1); *ppgr = pgr; return skb; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens11477.55%112.50%
Linus Torvalds (pre-git)2919.73%562.50%
Arnaldo Carvalho de Melo32.04%112.50%
Mika Kukkonen10.68%112.50%
Total147100.00%8100.00%

#define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted) { struct net_device *dev = pmc->interface->dev; struct net *net = dev_net(dev); struct igmpv3_report *pih; struct igmpv3_grec *pgr = NULL; struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list; int scount, stotal, first, isquery, truncate; if (pmc->multiaddr == IGMP_ALL_HOSTS) return skb; if (ipv4_is_local_multicast(pmc->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) return skb; isquery = type == IGMPV3_MODE_IS_INCLUDE || type == IGMPV3_MODE_IS_EXCLUDE; truncate = type == IGMPV3_MODE_IS_EXCLUDE || type == IGMPV3_CHANGE_TO_EXCLUDE; stotal = scount = 0; psf_list = sdeleted ? &pmc->tomb : &pmc->sources; if (!*psf_list) goto empty_source; pih = skb ? igmpv3_report_hdr(skb) : NULL; /* EX and TO_EX get a fresh packet, if needed */ if (truncate) { if (pih && pih->ngrec && AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { if (skb) igmpv3_sendpack(skb); skb = igmpv3_newpack(dev, dev->mtu); } } first = 1; psf_prev = NULL; for (psf = *psf_list; psf; psf = psf_next) { __be32 *psrc; psf_next = psf->sf_next; if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { psf_prev = psf; continue; } /* Based on RFC3376 5.1. Should not send source-list change * records when there is a filter mode change. */ if (((gdeleted && pmc->sfmode == MCAST_EXCLUDE) || (!gdeleted && pmc->crcount)) && (type == IGMPV3_ALLOW_NEW_SOURCES || type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) goto decrease_sf_crcount; /* clear marks on query responses */ if (isquery) psf->sf_gsresp = 0; if (AVAILABLE(skb) < sizeof(__be32) + first*sizeof(struct igmpv3_grec)) { if (truncate && !first) break; /* truncate these */ if (pgr) pgr->grec_nsrcs = htons(scount); if (skb) igmpv3_sendpack(skb); skb = igmpv3_newpack(dev, dev->mtu); first = 1; scount = 0; } if (first) { skb = add_grhead(skb, pmc, type, &pgr); first = 0; } if (!skb) return NULL; psrc = (__be32 *)skb_put(skb, sizeof(__be32)); *psrc = psf->sf_inaddr; scount++; stotal++; if ((type == IGMPV3_ALLOW_NEW_SOURCES || type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) { decrease_sf_crcount: psf->sf_crcount--; if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { if (psf_prev) psf_prev->sf_next = psf->sf_next; else *psf_list = psf->sf_next; kfree(psf); continue; } } psf_prev = psf; } empty_source: if (!stotal) { if (type == IGMPV3_ALLOW_NEW_SOURCES || type == IGMPV3_BLOCK_OLD_SOURCES) return skb; if (pmc->crcount || isquery) { /* make sure we have room for group header */ if (skb && AVAILABLE(skb) < sizeof(struct igmpv3_grec)) { igmpv3_sendpack(skb); skb = NULL; /* add_grhead will get a new one */ } skb = add_grhead(skb, pmc, type, &pgr); } } if (pgr) pgr->grec_nsrcs = htons(scount); if (isquery) pmc->gsquery = 0; /* clear query state on report */ return skb; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens50278.19%315.79%
Hangbin Liu436.70%15.26%
Linus Torvalds (pre-git)365.61%736.84%
Philip Downey152.34%15.26%
Nikolay Borisov142.18%15.26%
Linus Torvalds142.18%15.26%
Alexey Dobriyan81.25%15.26%
Al Viro40.62%210.53%
Arnaldo Carvalho de Melo30.47%15.26%
Mika Kukkonen30.47%15.26%
Total642100.00%19100.00%


static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc) { struct sk_buff *skb = NULL; struct net *net = dev_net(in_dev->dev); int type; if (!pmc) { rcu_read_lock(); for_each_pmc_rcu(in_dev, pmc) { if (pmc->multiaddr == IGMP_ALL_HOSTS) continue; if (ipv4_is_local_multicast(pmc->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) continue; spin_lock_bh(&pmc->lock); if (pmc->sfcount[MCAST_EXCLUDE]) type = IGMPV3_MODE_IS_EXCLUDE; else type = IGMPV3_MODE_IS_INCLUDE; skb = add_grec(skb, pmc, type, 0, 0); spin_unlock_bh(&pmc->lock); } rcu_read_unlock(); } else { spin_lock_bh(&pmc->lock); if (pmc->sfcount[MCAST_EXCLUDE]) type = IGMPV3_MODE_IS_EXCLUDE; else type = IGMPV3_MODE_IS_INCLUDE; skb = add_grec(skb, pmc, type, 0, 0); spin_unlock_bh(&pmc->lock); } if (!skb) return 0; return igmpv3_sendpack(skb); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens16180.50%120.00%
Nikolay Borisov168.00%120.00%
Philip Downey136.50%120.00%
Eric Dumazet94.50%120.00%
Mika Kukkonen10.50%120.00%
Total200100.00%5100.00%

/* * remove zero-count source records from a source filter list */
static void igmpv3_clear_zeros(struct ip_sf_list **ppsf) { struct ip_sf_list *psf_prev, *psf_next, *psf; psf_prev = NULL; for (psf = *ppsf; psf; psf = psf_next) { psf_next = psf->sf_next; if (psf->sf_crcount == 0) { if (psf_prev) psf_prev->sf_next = psf->sf_next; else *ppsf = psf->sf_next; kfree(psf); } else psf_prev = psf; } }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens8798.86%150.00%
Mika Kukkonen11.14%150.00%
Total88100.00%2100.00%


static void igmpv3_send_cr(struct in_device *in_dev) { struct ip_mc_list *pmc, *pmc_prev, *pmc_next; struct sk_buff *skb = NULL; int type, dtype; rcu_read_lock(); spin_lock_bh(&in_dev->mc_tomb_lock); /* deleted MCA's */ pmc_prev = NULL; for (pmc = in_dev->mc_tomb; pmc; pmc = pmc_next) { pmc_next = pmc->next; if (pmc->sfmode == MCAST_INCLUDE) { type = IGMPV3_BLOCK_OLD_SOURCES; dtype = IGMPV3_BLOCK_OLD_SOURCES; skb = add_grec(skb, pmc, type, 1, 0); skb = add_grec(skb, pmc, dtype, 1, 1); } if (pmc->crcount) { if (pmc->sfmode == MCAST_EXCLUDE) { type = IGMPV3_CHANGE_TO_INCLUDE; skb = add_grec(skb, pmc, type, 1, 0); } pmc->crcount--; if (pmc->crcount == 0) { igmpv3_clear_zeros(&pmc->tomb); igmpv3_clear_zeros(&pmc->sources); } } if (pmc->crcount == 0 && !pmc->tomb && !pmc->sources) { if (pmc_prev) pmc_prev->next = pmc_next; else in_dev->mc_tomb = pmc_next; in_dev_put(pmc->interface); kfree(pmc); } else pmc_prev = pmc; } spin_unlock_bh(&in_dev->mc_tomb_lock); /* change recs */ for_each_pmc_rcu(in_dev, pmc) { spin_lock_bh(&pmc->lock); if (pmc->sfcount[MCAST_EXCLUDE]) { type = IGMPV3_BLOCK_OLD_SOURCES; dtype = IGMPV3_ALLOW_NEW_SOURCES; } else { type = IGMPV3_ALLOW_NEW_SOURCES; dtype = IGMPV3_BLOCK_OLD_SOURCES; } skb = add_grec(skb, pmc, type, 0, 0); skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ /* filter mode changes */ if (pmc->crcount) { if (pmc->sfmode == MCAST_EXCLUDE) type = IGMPV3_CHANGE_TO_EXCLUDE; else type = IGMPV3_CHANGE_TO_INCLUDE; skb = add_grec(skb, pmc, type, 0, 0); pmc->crcount--; } spin_unlock_bh(&pmc->lock); } rcu_read_unlock(); if (!skb) return; (void) igmpv3_sendpack(skb); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens38395.99%240.00%
Eric Dumazet102.51%120.00%
David S. Miller41.00%120.00%
Mika Kukkonen20.50%120.00%
Total399100.00%5100.00%


static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc, int type) { struct sk_buff *skb; struct iphdr *iph; struct igmphdr *ih; struct rtable *rt; struct net_device *dev = in_dev->dev; struct net *net = dev_net(dev); __be32 group = pmc ? pmc->multiaddr : 0; struct flowi4 fl4; __be32 dst; int hlen, tlen; if (type == IGMPV3_HOST_MEMBERSHIP_REPORT) return igmpv3_send_report(in_dev, pmc); if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports) return 0; if (type == IGMP_HOST_LEAVE_MESSAGE) dst = IGMP_ALL_ROUTER; else dst = group; rt = ip_route_output_ports(net, &fl4, NULL, dst, 0, 0, 0, IPPROTO_IGMP, 0, dev->ifindex); if (IS_ERR(rt)) return -1; hlen = LL_RESERVED_SPACE(dev); tlen = dev->needed_tailroom; skb = alloc_skb(IGMP_SIZE + hlen + tlen, GFP_ATOMIC); if (!skb) { ip_rt_put(rt); return -1; } skb->priority = TC_PRIO_CONTROL; skb_dst_set(skb, &rt->dst); skb_reserve(skb, hlen); skb_reset_network_header(skb); iph = ip_hdr(skb); skb_put(skb, sizeof(struct iphdr) + 4); iph->version = 4; iph->ihl = (sizeof(struct iphdr)+4)>>2; iph->tos = 0xc0; iph->frag_off = htons(IP_DF); iph->ttl = 1; iph->daddr = dst; iph->saddr = fl4.saddr; iph->protocol = IPPROTO_IGMP; ip_select_ident(net, skb, NULL); ((u8 *)&iph[1])[0] = IPOPT_RA; ((u8 *)&iph[1])[1] = 4; ((u8 *)&iph[1])[2] = 0; ((u8 *)&iph[1])[3] = 0; ih = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr)); ih->type = type; ih->code = 0; ih->csum = 0; ih->group = group; ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr)); return ip_local_out(net, skb->sk, skb); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens34773.99%14.76%
David S. Miller377.89%419.05%
Herbert Xu234.90%29.52%
Philip Downey132.77%14.76%
Arnaldo Carvalho de Melo112.35%29.52%
Daniel Lezcano112.35%14.76%
Hannes Frederic Sowa81.71%29.52%
Eric W. Biedermann61.28%29.52%
Nikolay Borisov40.85%14.76%
Eric Dumazet40.85%14.76%
Al Viro20.43%14.76%
Ian Morris10.21%14.76%
Denis V. Lunev10.21%14.76%
Ansis Atteka10.21%14.76%
Total469100.00%21100.00%


static void igmp_gq_timer_expire(unsigned long data) { struct in_device *in_dev = (struct in_device *)data; in_dev->mr_gq_running = 0; igmpv3_send_report(in_dev, NULL); in_dev_put(in_dev); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens3895.00%250.00%
Mika Kukkonen12.50%125.00%
Salam Noureddine12.50%125.00%
Total40100.00%4100.00%


static void igmp_ifc_timer_expire(unsigned long data) { struct in_device *in_dev = (struct in_device *)data; igmpv3_send_cr(in_dev); if (in_dev->mr_ifc_count) { in_dev->mr_ifc_count--; igmp_ifc_start_timer(in_dev, unsolicited_report_interval(in_dev)); } in_dev_put(in_dev); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens5090.91%250.00%
William Manley47.27%125.00%
Salam Noureddine11.82%125.00%
Total55100.00%4100.00%


static void igmp_ifc_event(struct in_device *in_dev) { struct net *net = dev_net(in_dev->dev); if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) return; in_dev->mr_ifc_count = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; igmp_ifc_start_timer(in_dev, 1); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens4170.69%133.33%
Nikolay Borisov1627.59%133.33%
Hannes Frederic Sowa11.72%133.33%
Total58100.00%3100.00%


static void igmp_timer_expire(unsigned long data) { struct ip_mc_list *im = (struct ip_mc_list *)data; struct in_device *in_dev = im->interface; spin_lock(&im->lock); im->tm_running = 0; if (im->unsolicit_count) { im->unsolicit_count--; igmp_start_timer(im, unsolicited_report_interval(in_dev)); } im->reporter = 1; spin_unlock(&im->lock); if (IGMP_V1_SEEN(in_dev)) igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT); else if (IGMP_V2_SEEN(in_dev)) igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT); else igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT); ip_ma_put(im); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens12696.92%266.67%
William Manley43.08%133.33%
Total130100.00%3100.00%

/* mark EXCLUDE-mode sources */
static int igmp_xmarksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs) { struct ip_sf_list *psf; int i, scount; scount = 0; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (scount == nsrcs) break; for (i = 0; i < nsrcs; i++) { /* skip inactive filters */ if (psf->sf_count[MCAST_INCLUDE] || pmc->sfcount[MCAST_EXCLUDE] != psf->sf_count[MCAST_EXCLUDE]) break; if (srcs[i] == psf->sf_inaddr) { scount++; break; } } } pmc->gsquery = 0; if (scount == nsrcs) /* all sources excluded */ return 0; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens12996.99%240.00%
Zheng Yan21.50%120.00%
Al Viro10.75%120.00%
Li RongQing10.75%120.00%
Total133100.00%5100.00%


static int igmp_marksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs) { struct ip_sf_list *psf; int i, scount; if (pmc->sfmode == MCAST_EXCLUDE) return igmp_xmarksources(pmc, nsrcs, srcs); /* mark INCLUDE-mode sources */ scount = 0; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (scount == nsrcs) break; for (i = 0; i < nsrcs; i++) if (srcs[i] == psf->sf_inaddr) { psf->sf_gsresp = 1; scount++; break; } } if (!scount) { pmc->gsquery = 0; return 0; } pmc->gsquery = 1; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens13699.27%266.67%
Al Viro10.73%133.33%
Total137100.00%3100.00%

/* return true if packet was dropped */
static bool igmp_heard_report(struct in_device *in_dev, __be32 group) { struct ip_mc_list *im; struct net *net = dev_net(in_dev->dev); /* Timers are only set for non-local groups */ if (group == IGMP_ALL_HOSTS) return false; if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports) return false; rcu_read_lock(); for_each_pmc_rcu(in_dev, im) { if (im->multiaddr == group) { igmp_stop_timer(im); break; } } rcu_read_unlock(); return false; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens4549.45%116.67%
Nikolay Borisov1617.58%116.67%
Eric Dumazet1617.58%233.33%
Philip Downey1314.29%116.67%
Al Viro11.10%116.67%
Total91100.00%6100.00%

/* return true if packet was dropped */
static bool igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb, int len) { struct igmphdr *ih = igmp_hdr(skb); struct igmpv3_query *ih3 = igmpv3_query_hdr(skb); struct ip_mc_list *im; __be32 group = ih->group; int max_delay; int mark = 0; struct net *net = dev_net(in_dev->dev); if (len == 8) { if (ih->code == 0) { /* Alas, old v1 router presents here. */ max_delay = IGMP_QUERY_RESPONSE_INTERVAL; in_dev->mr_v1_seen = jiffies + IGMP_V1_ROUTER_PRESENT_TIMEOUT; group = 0; } else { /* v2 router present */ max_delay = ih->code*(HZ/IGMP_TIMER_SCALE); in_dev->mr_v2_seen = jiffies + IGMP_V2_ROUTER_PRESENT_TIMEOUT; } /* cancel the interface change timer */ in_dev->mr_ifc_count = 0; if (del_timer(&in_dev->mr_ifc_timer)) __in_dev_put(in_dev); /* clear deleted report items */ igmpv3_clear_delrec(in_dev); } else if (len < 12) { return true; /* ignore bogus packet; freed by caller */ } else if (IGMP_V1_SEEN(in_dev)) { /* This is a v3 query with v1 queriers present */ max_delay = IGMP_QUERY_RESPONSE_INTERVAL; group = 0; } else if (IGMP_V2_SEEN(in_dev)) { /* this is a v3 query with v2 queriers present; * Interpretation of the max_delay code is problematic here. * A real v2 host would use ih_code directly, while v3 has a * different encoding. We use the v3 encoding as more likely * to be intended in a v3 query. */ max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE); if (!max_delay) max_delay = 1; /* can't mod w/ 0 */ } else { /* v3 */ if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) return true; ih3 = igmpv3_query_hdr(skb); if (ih3->nsrcs) { if (!pskb_may_pull(skb, sizeof(struct igmpv3_query) + ntohs(ih3->nsrcs)*sizeof(__be32))) return true; ih3 = igmpv3_query_hdr(skb); } max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE); if (!max_delay) max_delay = 1; /* can't mod w/ 0 */ in_dev->mr_maxdelay = max_delay; if (ih3->qrv) in_dev->mr_qrv = ih3->qrv; if (!group) { /* general query */ if (ih3->nsrcs) return true; /* no sources allowed */ igmp_gq_start_timer(in_dev); return false; } /* mark sources to include, if group & source-specific */ mark = ih3->nsrcs != 0; } /* * - Start the timers in all of our membership records * that the query applies to for the interface on * which the query arrived excl. those that belong * to a "local" group (224.0.0.X) * - For timers already running check if they need to * be reset. * - Use the igmp->igmp_code field as the maximum * delay possible */ rcu_read_lock(); for_each_pmc_rcu(in_dev, im) { int changed; if (group && group != im->multiaddr) continue; if (im->multiaddr == IGMP_ALL_HOSTS) continue; if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) continue; spin_lock_bh(&im->lock); if (im->tm_running) im->gsquery = im->gsquery && mark; else im->gsquery = mark; changed = !im->gsquery || igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs); spin_unlock_bh(&im->lock); if (changed) igmp_mod_timer(im, max_delay); } rcu_read_unlock(); return false; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens35970.53%533.33%
Stephen Hemminger6412.57%16.67%
Eric Dumazet275.30%213.33%
Nikolay Borisov163.14%16.67%
Philip Downey132.55%16.67%
Arnaldo Carvalho de Melo132.55%16.67%
Ben Hutchings101.96%16.67%
Fabian Frederick40.79%16.67%
Al Viro20.39%16.67%
Daniel Borkmann10.20%16.67%
Total509100.00%15100.00%

/* called in rcu_read_lock() section */
int igmp_rcv(struct sk_buff *skb) { /* This basically follows the spec line by line -- see RFC1112 */ struct igmphdr *ih; struct in_device *in_dev = __in_dev_get_rcu(skb->dev); int len = skb->len; bool dropped = true; if (!in_dev) goto drop; if (!pskb_may_pull(skb, sizeof(struct igmphdr))) goto drop; if (skb_checksum_simple_validate(skb)) goto drop; ih = igmp_hdr(skb); switch (ih->type) { case IGMP_HOST_MEMBERSHIP_QUERY: dropped = igmp_heard_query(in_dev, skb, len); break; case IGMP_HOST_MEMBERSHIP_REPORT: case IGMPV2_HOST_MEMBERSHIP_REPORT: /* Is it our report looped back? */ if (rt_is_output_route(skb_rtable(skb))) break; /* don't rely on MC router hearing unicast reports */ if (skb->pkt_type == PACKET_MULTICAST || skb->pkt_type == PACKET_BROADCAST) dropped = igmp_heard_report(in_dev, ih->group); break; case IGMP_PIM: #ifdef CONFIG_IP_PIMSM_V1 return pim_rcv_v1(skb); #endif case IGMPV3_HOST_MEMBERSHIP_REPORT: case IGMP_DVMRP: case IGMP_TRACE: case IGMP_HOST_LEAVE_MESSAGE: case IGMP_MTRACE: case IGMP_MTRACE_RESP: break; default: break; } drop: if (dropped) kfree_skb(skb); else consume_skb(skb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens14771.71%214.29%
Eric Dumazet2512.20%321.43%
Herbert Xu115.37%214.29%
Stephen Hemminger83.90%17.14%
Denis V. Lunev52.44%17.14%
Arnaldo Carvalho de Melo31.46%17.14%
David S. Miller31.46%17.14%
Ian Morris10.49%17.14%
Linus Torvalds10.49%17.14%
Tom Herbert10.49%17.14%
Total205100.00%14100.00%

#endif /* * Add a filter to a device */
static void ip_mc_filter_add(struct in_device *in_dev, __be32 addr) { char buf[MAX_ADDR_LEN]; struct net_device *dev = in_dev->dev; /* Checking for IFF_MULTICAST here is WRONG-WRONG-WRONG. We will get multicast token leakage, when IFF_MULTICAST is changed. This check should be done in ndo_set_rx_mode routine. Something sort of: if (dev->mc_list && dev->flags&IFF_MULTICAST) { do it; } --ANK */ if (arp_mc_map(addr, buf, dev, 0) == 0) dev_mc_add(dev, buf); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens5096.15%133.33%
Jiri Pirko11.92%133.33%
Al Viro11.92%133.33%
Total52100.00%3100.00%

/* * Remove a filter from a device */
static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr) { char buf[MAX_ADDR_LEN]; struct net_device *dev = in_dev->dev; if (arp_mc_map(addr, buf, dev, 0) == 0) dev_mc_del(dev, buf); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens4996.08%133.33%
Al Viro11.96%133.33%
Jiri Pirko11.96%133.33%
Total51100.00%3100.00%

#ifdef CONFIG_IP_MULTICAST /* * deleted ip_mc_list manipulation */
static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im) { struct ip_mc_list *pmc; struct net *net = dev_net(in_dev->dev); /* this is an "ip_mc_list" for convenience; only the fields below * are actually used. In particular, the refcnt and users are not * used for management of the delete list. Using the same structure * for deleted items allows change reports to use common code with * non-deleted or query-response MCA's. */ pmc = kzalloc(sizeof(*pmc), GFP_KERNEL); if (!pmc) return; spin_lock_bh(&im->lock); pmc->interface = im->interface; in_dev_hold(in_dev); pmc->multiaddr = im->multiaddr; pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; pmc->sfmode = im->sfmode; if (pmc->sfmode == MCAST_INCLUDE) { struct ip_sf_list *psf; pmc->tomb = im->tomb; pmc->sources = im->sources; im->tomb = im->sources = NULL; for (psf = pmc->sources; psf; psf = psf->sf_next) psf->sf_crcount = pmc->crcount; } spin_unlock_bh(&im->lock); spin_lock_bh(&in_dev->mc_tomb_lock); pmc->next = in_dev->mc_tomb; in_dev->mc_tomb = pmc; spin_unlock_bh(&in_dev->mc_tomb_lock); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens18588.94%116.67%
Nikolay Borisov167.69%116.67%
David S. Miller41.92%116.67%
Panagiotis Issaris10.48%116.67%
Hannes Frederic Sowa10.48%116.67%
Mika Kukkonen10.48%116.67%
Total208100.00%6100.00%

/* * restore ip_mc_list deleted records */
static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im) { struct ip_mc_list *pmc, *pmc_prev; struct ip_sf_list *psf; struct net *net = dev_net(in_dev->dev); __be32 multiaddr = im->multiaddr; spin_lock_bh(&in_dev->mc_tomb_lock); pmc_prev = NULL; for (pmc = in_dev->mc_tomb; pmc; pmc = pmc->next) { if (pmc->multiaddr == multiaddr) break; pmc_prev = pmc; } if (pmc) { if (pmc_prev) pmc_prev->next = pmc->next; else in_dev->mc_tomb = pmc->next; } spin_unlock_bh(&in_dev->mc_tomb_lock); spin_lock_bh(&im->lock); if (pmc) { im->interface = pmc->interface; im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; im->sfmode = pmc->sfmode; if (pmc->sfmode == MCAST_INCLUDE) { im->tomb = pmc->tomb; im->sources = pmc->sources; for (psf = im->sources; psf; psf = psf->sf_next) psf->sf_crcount = im->crcount; } in_dev_put(pmc->interface); kfree(pmc); } spin_unlock_bh(&im->lock); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens13053.94%120.00%
Hangbin Liu10643.98%240.00%
David S. Miller41.66%120.00%
Mika Kukkonen10.41%120.00%
Total241100.00%5100.00%

/* * flush ip_mc_list deleted records */
static void igmpv3_clear_delrec(struct in_device *in_dev) { struct ip_mc_list *pmc, *nextpmc; spin_lock_bh(&in_dev->mc_tomb_lock); pmc = in_dev->mc_tomb; in_dev->mc_tomb = NULL; spin_unlock_bh(&in_dev->mc_tomb_lock); for (; pmc; pmc = nextpmc) { nextpmc = pmc->next; ip_mc_clear_src(pmc); in_dev_put(pmc->interface); kfree(pmc); } /* clear dead sources, too */ rcu_read_lock(); for_each_pmc_rcu(in_dev, pmc) { struct ip_sf_list *psf, *psf_next; spin_lock_bh(&pmc->lock); psf = pmc->tomb; pmc->tomb = NULL; spin_unlock_bh(&pmc->lock); for (; psf; psf = psf_next) { psf_next = psf->sf_next; kfree(psf); } } rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens13990.26%240.00%
Eric Dumazet95.84%120.00%
David S. Miller42.60%120.00%
Mika Kukkonen21.30%120.00%
Total154100.00%5100.00%

#endif
static void igmp_group_dropped(struct ip_mc_list *im) { struct in_device *in_dev = im->interface; #ifdef CONFIG_IP_MULTICAST struct net *net = dev_net(in_dev->dev); int reporter; #endif if (im->loaded) { im->loaded = 0; ip_mc_filter_del(in_dev, im->multiaddr); } #ifdef CONFIG_IP_MULTICAST if (im->multiaddr == IGMP_ALL_HOSTS) return; if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) return; reporter = im->reporter; igmp_stop_timer(im); if (!in_dev->dead) { if (IGMP_V1_SEEN(in_dev)) return; if (IGMP_V2_SEEN(in_dev)) { if (reporter) igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE); return; } /* IGMPv3 */ igmpv3_add_delrec(in_dev, im); igmp_ifc_event(in_dev); } #endif }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens12176.58%450.00%
Nikolay Borisov1610.13%112.50%
Philip Downey138.23%112.50%
David S. Miller63.80%112.50%
Veaceslav Falico21.27%112.50%
Total158100.00%8100.00%


static void igmp_group_added(struct ip_mc_list *im) { struct in_device *in_dev = im->interface; #ifdef CONFIG_IP_MULTICAST struct net *net = dev_net(in_dev->dev); #endif if (im->loaded == 0) { im->loaded = 1; ip_mc_filter_add(in_dev, im->multiaddr); } #ifdef CONFIG_IP_MULTICAST if (im->multiaddr == IGMP_ALL_HOSTS) return; if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) return; if (in_dev->dead) return; if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { spin_lock_bh(&im->lock); igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY); spin_unlock_bh(&im->lock); return; } /* else, v3 */ im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; igmp_ifc_event(in_dev); #endif }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens11974.84%225.00%
Nikolay Borisov2515.72%337.50%
Philip Downey138.18%112.50%
Fabian Frederick10.63%112.50%
Hannes Frederic Sowa10.63%112.50%
Total159100.00%8100.00%

/* * Multicast list managers */
static u32 ip_mc_hash(const struct ip_mc_list *im) { return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet26100.00%2100.00%
Total26100.00%2100.00%


static void ip_mc_hash_add(struct in_device *in_dev, struct ip_mc_list *im) { struct ip_mc_list __rcu **mc_hash; u32 hash; mc_hash = rtnl_dereference(in_dev->mc_hash); if (mc_hash) { hash = ip_mc_hash(im); im->next_hash = mc_hash[hash]; rcu_assign_pointer(mc_hash[hash], im); return; } /* do not use a hash table for small number of items */ if (in_dev->mc_count < 4) return; mc_hash = kzalloc(sizeof(struct ip_mc_list *) << MC_HASH_SZ_LOG, GFP_KERNEL); if (!mc_hash) return; for_each_pmc_rtnl(in_dev, im) { hash = ip_mc_hash(im); im->next_hash = mc_hash[hash]; RCU_INIT_POINTER(mc_hash[hash], im); } rcu_assign_pointer(in_dev->mc_hash, mc_hash); }

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Eric Dumazet143100.00%1100.00%
Total143100.00%1100.00%


static void ip_mc_hash_remove(struct in_device *in_dev, struct ip_mc_list *im) { struct ip_mc_list __rcu **mc_hash = rtnl_dereference(in_dev->mc_hash); struct ip_mc_list *aux; if (!mc_hash) return; mc_hash += ip_mc_hash(im); while ((aux = rtnl_dereference(*mc_hash)) != im) mc_hash = &aux->next_hash; *mc_hash = im->next_hash; }

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Eric Dumazet76100.00%1100.00%
Total76100.00%1100.00%

/* * A socket has joined a multicast group on device dev. */
void ip_mc_inc_group(struct in_device *in_dev, __be32 addr) { struct ip_mc_list *im; #ifdef CONFIG_IP_MULTICAST struct net *net = dev_net(in_dev->dev); #endif ASSERT_RTNL(); for_each_pmc_rtnl(in_dev, im) { if (im->multiaddr == addr) { im->users++; ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, NULL, 0); goto out; } } im = kzalloc(sizeof(*im), GFP_KERNEL); if (!im) goto out; im->users = 1; im->interface = in_dev; in_dev_hold(in_dev); im->multiaddr = addr; /* initial mode is (EX, empty) */ im->sfmode = MCAST_EXCLUDE; im->sfcount[MCAST_EXCLUDE] = 1; atomic_set(&im->refcnt, 1); spin_lock_init(&im->lock); #ifdef CONFIG_IP_MULTICAST setup_timer(&im->timer, igmp_timer_expire, (unsigned long)im); im->unsolicit_count = net->ipv4.sysctl_igmp_qrv; #endif im->next_rcu = in_dev->mc_list; in_dev->mc_count++; rcu_assign_pointer(in_dev->mc_list, im); ip_mc_hash_add(in_dev, im); #ifdef CONFIG_IP_MULTICAST igmpv3_del_delrec(in_dev, im); #endif igmp_group_added(im); if (!in_dev->dead) ip_rt_multicast_event(in_dev); out: return; }

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David L Stevens18975.60%323.08%
Eric Dumazet2911.60%323.08%
Nikolay Borisov218.40%215.38%
Pavel Emelyanov52.00%17.69%
Rami Rosen31.20%17.69%
Al Viro10.40%17.69%
Mika Kukkonen10.40%17.69%
Hannes Frederic Sowa10.40%17.69%
Total250100.00%13100.00%

EXPORT_SYMBOL(ip_mc_inc_group);
static int ip_mc_check_iphdr(struct sk_buff *skb) { const struct iphdr *iph; unsigned int len; unsigned int offset = skb_network_offset(skb) + sizeof(*iph); if (!pskb_may_pull(skb, offset)) return -EINVAL; iph = ip_hdr(skb); if (iph->version != 4 || ip_hdrlen(skb) < sizeof(*iph)) return -EINVAL; offset += ip_hdrlen(skb) - sizeof(*iph); if (!pskb_may_pull(skb, offset)) return -EINVAL; iph = ip_hdr(skb); if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) return -EINVAL; len = skb_network_offset(skb) + ntohs(iph->tot_len); if (skb->len < len || len < offset) return -EINVAL; skb_set_transport_header(skb, offset); return 0; }

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Linus Lüssing176100.00%1100.00%
Total176100.00%1100.00%


static int ip_mc_check_igmp_reportv3(struct sk_buff *skb) { unsigned int len = skb_transport_offset(skb); len += sizeof(struct igmpv3_report); return pskb_may_pull(skb, len) ? 0 : -EINVAL; }

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Linus Lüssing41100.00%1100.00%
Total41100.00%1100.00%


static int ip_mc_check_igmp_query(struct sk_buff *skb) { unsigned int len = skb_transport_offset(skb); len += sizeof(struct igmphdr); if (skb->len < len) return -EINVAL; /* IGMPv{1,2}? */ if (skb->len != len) { /* or IGMPv3? */ len += sizeof(struct igmpv3_query) - sizeof(struct igmphdr); if (skb->len < len || !pskb_may_pull(skb, len)) return -EINVAL; } /* RFC2236+RFC3376 (IGMPv2+IGMPv3) require the multicast link layer * all-systems destination addresses (224.0.0.1) for general queries */ if (!igmp_hdr(skb)->group && ip_hdr(skb)->daddr != htonl(INADDR_ALLHOSTS_GROUP)) return -EINVAL; return 0; }

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Linus Lüssing116100.00%1100.00%
Total116100.00%1100.00%


static int ip_mc_check_igmp_msg(struct sk_buff *skb) { switch (igmp_hdr(skb)->type) { case IGMP_HOST_LEAVE_MESSAGE: case IGMP_HOST_MEMBERSHIP_REPORT: case IGMPV2_HOST_MEMBERSHIP_REPORT: /* fall through */ return 0; case IGMPV3_HOST_MEMBERSHIP_REPORT: return ip_mc_check_igmp_reportv3(skb); case IGMP_HOST_MEMBERSHIP_QUERY: return ip_mc_check_igmp_query(skb); default: return -ENOMSG; } }

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Linus Lüssing58100.00%1100.00%
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static inline __sum16 ip_mc_validate_checksum(struct sk_buff *skb) { return skb_checksum_simple_validate(skb); }

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Linus Lüssing18100.00%1100.00%
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static int __ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed) { struct sk_buff *skb_chk; unsigned int transport_len; unsigned int len = skb_transport_offset(skb) + sizeof(struct igmphdr); int ret = -EINVAL; transport_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); skb_chk = skb_checksum_trimmed(skb, transport_len, ip_mc_validate_checksum); if (!skb_chk) goto err; if (!pskb_may_pull(skb_chk, len)) goto err; ret = ip_mc_check_igmp_msg(skb_chk); if (ret) goto err; if (skb_trimmed) *skb_trimmed = skb_chk; /* free now unneeded clone */ else if (skb_chk != skb) kfree_skb(skb_chk); ret = 0; err: if (ret && skb_chk && skb_chk != skb) kfree_skb(skb_chk); return ret; }

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Linus Lüssing156100.00%2100.00%
Total156100.00%2100.00%

/** * ip_mc_check_igmp - checks whether this is a sane IGMP packet * @skb: the skb to validate * @skb_trimmed: to store an skb pointer trimmed to IPv4 packet tail (optional) * * Checks whether an IPv4 packet is a valid IGMP packet. If so sets * skb transport header accordingly and returns zero. * * -EINVAL: A broken packet was detected, i.e. it violates some internet * standard * -ENOMSG: IP header validation succeeded but it is not an IGMP packet. * -ENOMEM: A memory allocation failure happened. * * Optionally, an skb pointer might be provided via skb_trimmed (or set it * to NULL): After parsing an IGMP packet successfully it will point to * an skb which has its tail aligned to the IP packet end. This might * either be the originally provided skb or a trimmed, cloned version if * the skb frame had data beyond the IP packet. A cloned skb allows us * to leave the original skb and its full frame unchanged (which might be * desirable for layer 2 frame jugglers). * * Caller needs to set the skb network header and free any returned skb if it * differs from the provided skb. */
int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed) { int ret = ip_mc_check_iphdr(skb); if (ret < 0) return ret; if (ip_hdr(skb)->protocol != IPPROTO_IGMP) return -ENOMSG; return __ip_mc_check_igmp(skb, skb_trimmed); }

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Linus Lüssing56100.00%1100.00%
Total56100.00%1100.00%

EXPORT_SYMBOL(ip_mc_check_igmp); /* * Resend IGMP JOIN report; used by netdev notifier. */
static void ip_mc_rejoin_groups(struct in_device *in_dev) { #ifdef CONFIG_IP_MULTICAST struct ip_mc_list *im; int type; struct net *net = dev_net(in_dev->dev); ASSERT_RTNL(); for_each_pmc_rtnl(in_dev, im) { if (im->multiaddr == IGMP_ALL_HOSTS) continue; if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports) continue; /* a failover is happening and switches * must be notified immediately */ if (IGMP_V1_SEEN(in_dev)) type = IGMP_HOST_MEMBERSHIP_REPORT; else if (IGMP_V2_SEEN(in_dev)) type = IGMPV2_HOST_MEMBERSHIP_REPORT; else type = IGMPV3_HOST_MEMBERSHIP_REPORT; igmp_send_report(in_dev, im, type); } #endif }

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Jay Vosburgh3733.33%114.29%
Eric Dumazet2522.52%114.29%
Nikolay Borisov1614.41%114.29%
Philip Downey1311.71%114.29%
Flavio Leitner1210.81%114.29%
Jiri Pirko54.50%114.29%
Geert Uytterhoeven32.70%114.29%
Total111100.00%7100.00%

/* * A socket has left a multicast group on device dev */
void ip_mc_dec_group(struct in_device *in_dev, __be32 addr) { struct ip_mc_list *i; struct ip_mc_list __rcu **ip; ASSERT_RTNL(); for (ip = &in_dev->mc_list; (i = rtnl_dereference(*ip)) != NULL; ip = &i->next_rcu) { if (i->multiaddr == addr) { if (--i->users == 0) { ip_mc_hash_remove(in_dev, i); *ip = i->next_rcu; in_dev->mc_count--; igmp_group_dropped(i); ip_mc_clear_src(i); if (!in_dev->dead) ip_rt_multicast_event(in_dev); ip_ma_put(i); return; } break; } } }

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David L Stevens10078.74%228.57%
Eric Dumazet1612.60%228.57%
Veaceslav Falico53.94%114.29%
Rami Rosen53.94%114.29%
Al Viro10.79%114.29%
Total127100.00%7100.00%

EXPORT_SYMBOL(ip_mc_dec_group); /* Device changing type */
void ip_mc_unmap(struct in_device *in_dev) { struct ip_mc_list *pmc; ASSERT_RTNL(); for_each_pmc_rtnl(in_dev, pmc) igmp_group_dropped(pmc); }

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Moni Shoua2172.41%150.00%
Eric Dumazet827.59%150.00%
Total29100.00%2100.00%


void ip_mc_remap(struct in_device *in_dev) { struct ip_mc_list *pmc; ASSERT_RTNL(); for_each_pmc_rtnl(in_dev, pmc) { #ifdef CONFIG_IP_MULTICAST igmpv3_del_delrec(in_dev, pmc); #endif igmp_group_added(pmc); } }

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Moni Shoua2148.84%133.33%
Hangbin Liu1432.56%133.33%
Eric Dumazet818.60%133.33%
Total43100.00%3100.00%

/* Device going down */
void ip_mc_down(struct in_device *in_dev) { struct ip_mc_list *pmc; ASSERT_RTNL(); for_each_pmc_rtnl(in_dev, pmc) igmp_group_dropped(pmc); #ifdef CONFIG_IP_MULTICAST in_dev->mr_ifc_count = 0; if (del_timer(&in_dev->mr_ifc_timer)) __in_dev_put(in_dev); in_dev->mr_gq_running = 0; if (del_timer(&in_dev->mr_gq_timer)) __in_dev_put(in_dev); #endif ip_mc_dec_group(in_dev, IGMP_ALL_HOSTS); }

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David L Stevens7286.75%466.67%
Eric Dumazet89.64%116.67%
David S. Miller33.61%116.67%
Total83100.00%6100.00%


void ip_mc_init_dev(struct in_device *in_dev) { #ifdef CONFIG_IP_MULTICAST struct net *net = dev_net(in_dev->dev); #endif ASSERT_RTNL(); #ifdef CONFIG_IP_MULTICAST setup_timer(&in_dev->mr_gq_timer, igmp_gq_timer_expire, (unsigned long)in_dev); setup_timer(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire, (unsigned long)in_dev); in_dev->mr_qrv = net->ipv4.sysctl_igmp_qrv; #endif spin_lock_init(&in_dev->mc_tomb_lock); }

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PersonTokensPropCommitsCommitProp
David L Stevens4047.06%222.22%
Nikolay Borisov2124.71%222.22%
Pavel Emelyanov1011.76%111.11%
David S. Miller910.59%222.22%
Andrew Morton44.71%111.11%
Hannes Frederic Sowa11.18%111.11%
Total85100.00%9100.00%

/* Device going up */
void ip_mc_up(struct in_device *in_dev) { struct ip_mc_list *pmc; #ifdef CONFIG_IP_MULTICAST struct net *net = dev_net(in_dev->dev); #endif ASSERT_RTNL(); #ifdef CONFIG_IP_MULTICAST in_dev->mr_qrv = net->ipv4.sysctl_igmp_qrv; #endif ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS); for_each_pmc_rtnl(in_dev, pmc) { #ifdef CONFIG_IP_MULTICAST igmpv3_del_delrec(in_dev, pmc); #endif igmp_group_added(pmc); } }

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David L Stevens2834.15%228.57%
Nikolay Borisov2125.61%228.57%
Hangbin Liu1417.07%114.29%
Hannes Frederic Sowa1113.41%114.29%
Eric Dumazet89.76%114.29%
Total82100.00%7100.00%

/* * Device is about to be destroyed: clean up. */
void ip_mc_destroy_dev(struct in_device *in_dev) { struct ip_mc_list *i; ASSERT_RTNL(); /* Deactivate timers */ ip_mc_down(in_dev); #ifdef CONFIG_IP_MULTICAST igmpv3_clear_delrec(in_dev); #endif while ((i = rtnl_dereference(in_dev->mc_list)) != NULL) { in_dev->mc_list = i->next_rcu; in_dev->mc_count--; ip_ma_put(i); } }

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David L Stevens5072.46%240.00%
Hangbin Liu1014.49%120.00%
Rami Rosen57.25%120.00%
Eric Dumazet45.80%120.00%
Total69100.00%5100.00%

/* RTNL is locked */
static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr) { struct net_device *dev = NULL; struct in_device *idev = NULL; if (imr->imr_ifindex) { idev = inetdev_by_index(net, imr->imr_ifindex); return idev; } if (imr->imr_address.s_addr) { dev = __ip_dev_find(net, imr->imr_address.s_addr, false); if (!dev) return NULL; } if (!dev) { struct rtable *rt = ip_route_output(net, imr->imr_multiaddr.s_addr, 0, 0, 0); if (!IS_ERR(rt)) { dev = rt->dst.dev; ip_rt_put(rt); } } if (dev) { imr->imr_ifindex = dev->ifindex; idev = __in_dev_get_rtnl(dev); } return idev; }

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David L Stevens12073.62%220.00%
David S. Miller2817.18%220.00%
Daniel Lezcano84.91%110.00%
Eric Dumazet31.84%110.00%
Denis V. Lunev31.84%330.00%
Herbert Xu10.61%110.00%
Total163100.00%10100.00%

/* * Join a socket to a group */
static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode, __be32 *psfsrc) { struct ip_sf_list *psf, *psf_prev; int rv = 0; psf_prev = NULL; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (psf->sf_inaddr == *psfsrc) break; psf_prev = psf; } if (!psf || psf->sf_count[sfmode] == 0) { /* source filter not found, or count wrong => bug */ return -ESRCH; } psf->sf_count[sfmode]--; if (psf->sf_count[sfmode] == 0) { ip_rt_multicast_event(pmc->interface); } if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { #ifdef CONFIG_IP_MULTICAST struct in_device *in_dev = pmc->interface; struct net *net = dev_net(in_dev->dev); #endif /* no more filters for this source */ if (psf_prev) psf_prev->sf_next = psf->sf_next; else pmc->sources = psf->sf_next; #ifdef CONFIG_IP_MULTICAST if (psf->sf_oldin && !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) { psf->sf_crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; psf->sf_next = pmc->tomb; pmc->tomb = psf; rv = 1; } else #endif kfree(psf); } return rv; }

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David L Stevens23292.43%233.33%
Nikolay Borisov166.37%116.67%
Al Viro10.40%116.67%
Mika Kukkonen10.40%116.67%
Hannes Frederic Sowa10.40%116.67%
Total251100.00%6100.00%

#ifndef CONFIG_IP_MULTICAST #define igmp_ifc_event(x) do { } while (0) #endif
static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode, int sfcount, __be32 *psfsrc, int delta) { struct ip_mc_list *pmc; int changerec = 0; int i, err; if (!in_dev) return -ENODEV; rcu_read_lock(); for_each_pmc_rcu(in_dev, pmc) { if (*pmca == pmc->multiaddr) break; } if (!pmc) { /* MCA not found?? bug */ rcu_read_unlock(); return -ESRCH; } spin_lock_bh(&pmc->lock); rcu_read_unlock(); #ifdef CONFIG_IP_MULTICAST sf_markstate(pmc); #endif if (!delta) { err = -EINVAL; if (!pmc->sfcount[sfmode]) goto out_unlock; pmc->sfcount[sfmode]--; } err = 0; for (i = 0; i < sfcount; i++) { int rv = ip_mc_del1_src(pmc, sfmode, &psfsrc[i]); changerec |= rv > 0; if (!err && rv < 0) err = rv; } if (pmc->sfmode == MCAST_EXCLUDE && pmc->sfcount[MCAST_EXCLUDE] == 0 && pmc->sfcount[MCAST_INCLUDE]) { #ifdef CONFIG_IP_MULTICAST struct ip_sf_list *psf; struct net *net = dev_net(in_dev->dev); #endif /* filter mode change */ pmc->sfmode = MCAST_INCLUDE; #ifdef CONFIG_IP_MULTICAST pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; in_dev->mr_ifc_count = pmc->crcount; for (psf = pmc->sources; psf; psf = psf->sf_next) psf->sf_crcount = 0; igmp_ifc_event(pmc->interface); } else if (sf_setstate(pmc) || changerec) { igmp_ifc_event(pmc->interface); #endif } out_unlock: spin_unlock_bh(&pmc->lock); return err; }

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David L Stevens29787.35%222.22%
Nikolay Borisov164.71%111.11%
Eric Dumazet113.24%111.11%
Petr Vandrovec102.94%111.11%
Al Viro20.59%111.11%
David S. Miller20.59%111.11%
Hannes Frederic Sowa10.29%111.11%
Adrian Bunk10.29%111.11%
Total340100.00%9100.00%

/* * Add multicast single-source filter to the interface list */
static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode, __be32 *psfsrc) { struct ip_sf_list *psf, *psf_prev; psf_prev = NULL; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (psf->sf_inaddr == *psfsrc) break; psf_prev = psf; } if (!psf) { psf = kzalloc(sizeof(*psf), GFP_ATOMIC); if (!psf) return -ENOBUFS; psf->sf_inaddr = *psfsrc; if (psf_prev) { psf_prev->sf_next = psf; } else pmc->sources = psf; } psf->sf_count[sfmode]++; if (psf->sf_count[sfmode] == 1) { ip_rt_multicast_event(pmc->interface); } return 0; }

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David L Stevens14597.97%125.00%
Mika Kukkonen10.68%125.00%
Panagiotis Issaris10.68%125.00%
Al Viro10.68%125.00%
Total148100.00%4100.00%

#ifdef CONFIG_IP_MULTICAST
static void sf_markstate(struct ip_mc_list *pmc) { struct ip_sf_list *psf; int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; for (psf = pmc->sources; psf; psf = psf->sf_next) if (pmc->sfcount[MCAST_EXCLUDE]) { psf->sf_oldin = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && !psf->sf_count[MCAST_INCLUDE]; } else psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; }

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David L Stevens88100.00%1100.00%
Total88100.00%1100.00%


static int sf_setstate(struct ip_mc_list *pmc) { struct ip_sf_list *psf, *dpsf; int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; int qrv = pmc->interface->mr_qrv; int new_in, rv; rv = 0; for (psf = pmc->sources; psf; psf = psf->sf_next) { if (pmc->sfcount[MCAST_EXCLUDE]) { new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && !psf->sf_count[MCAST_INCLUDE]; } else new_in = psf->sf_count[MCAST_INCLUDE] != 0; if (new_in) { if (!psf->sf_oldin) { struct ip_sf_list *prev = NULL; for (dpsf = pmc->tomb; dpsf; dpsf = dpsf->sf_next) { if (dpsf->sf_inaddr == psf->sf_inaddr) break; prev = dpsf; } if (dpsf) { if (prev) prev->sf_next = dpsf->sf_next; else pmc->tomb = dpsf->sf_next; kfree(dpsf); } psf->sf_crcount = qrv; rv++; } } else if (psf->sf_oldin) { psf->sf_crcount = 0; /* * add or update "delete" records if an active filter * is now inactive */ for (dpsf = pmc->tomb; dpsf; dpsf = dpsf->sf_next) if (dpsf->sf_inaddr == psf->sf_inaddr) break; if (!dpsf) { dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); if (!dpsf) continue; *dpsf = *psf; /* pmc->lock held by callers */ dpsf->sf_next = pmc->tomb; pmc->tomb = dpsf; } dpsf->sf_crcount = qrv; rv++; } } return rv; }

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David L Stevens30499.67%266.67%
Al Viro10.33%133.33%
Total305100.00%3100.00%

#endif /* * Add multicast source filter list to the interface list */
static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode, int sfcount, __be32 *psfsrc, int delta) { struct ip_mc_list *pmc; int isexclude; int i, err; if (!in_dev) return -ENODEV; rcu_read_lock(); for_each_pmc_rcu(in_dev, pmc) { if (*pmca == pmc->multiaddr) break; } if (!pmc) { /* MCA not found?? bug */ rcu_read_unlock(); return -ESRCH; } spin_lock_bh(&pmc->lock); rcu_read_unlock(); #ifdef CONFIG_IP_MULTICAST sf_markstate(pmc); #endif isexclude = pmc->sfmode == MCAST_EXCLUDE; if (!delta) pmc->sfcount[sfmode]++; err = 0; for (i = 0; i < sfcount; i++) { err = ip_mc_add1_src(pmc, sfmode, &psfsrc[i]); if (err) break; } if (err) { int j; if (!delta) pmc->sfcount[sfmode]--; for (j = 0; j < i; j++) (void) ip_mc_del1_src(pmc, sfmode, &psfsrc[j]); } else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) { #ifdef CONFIG_IP_MULTICAST struct ip_sf_list *psf; struct net *net = dev_net(pmc->interface->dev); in_dev = pmc->interface; #endif /* filter mode change */ if (pmc->sfcount[MCAST_EXCLUDE]) pmc->sfmode = MCAST_EXCLUDE; else if (pmc->sfcount[MCAST_INCLUDE]) pmc->sfmode = MCAST_INCLUDE; #ifdef CONFIG_IP_MULTICAST /* else no filters; keep old mode for reports */ pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; in_dev->mr_ifc_count = pmc->crcount; for (psf = pmc->sources; psf; psf = psf->sf_next) psf->sf_crcount = 0; igmp_ifc_event(in_dev); } else if (sf_setstate(pmc)) { igmp_ifc_event(in_dev); #endif } spin_unlock_bh(&pmc->lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens33688.42%220.00%
Nikolay Borisov184.74%110.00%
Eric Dumazet112.89%110.00%
Stephen Hemminger51.32%110.00%
Jun Zhao51.32%110.00%
Al Viro20.53%110.00%
Adrian Bunk10.26%110.00%
Hannes Frederic Sowa10.26%110.00%
Julia Lawall10.26%110.00%
Total380100.00%10100.00%


static void ip_mc_clear_src(struct ip_mc_list *pmc) { struct ip_sf_list *psf, *nextpsf; for (psf = pmc->tomb; psf; psf = nextpsf) { nextpsf = psf->sf_next; kfree(psf); } pmc->tomb = NULL; for (psf = pmc->sources; psf; psf = nextpsf) { nextpsf = psf->sf_next; kfree(psf); } pmc->sources = NULL; pmc->sfmode = MCAST_EXCLUDE; pmc->sfcount[MCAST_INCLUDE] = 0; pmc->sfcount[MCAST_EXCLUDE] = 1; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens10697.25%133.33%
Mika Kukkonen21.83%133.33%
Denis Lukianov10.92%133.33%
Total109100.00%3100.00%

/* Join a multicast group */
int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr) { __be32 addr = imr->imr_multiaddr.s_addr; struct ip_mc_socklist *iml, *i; struct in_device *in_dev; struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); int ifindex; int count = 0; int err; ASSERT_RTNL(); if (!ipv4_is_multicast(addr)) return -EINVAL; in_dev = ip_mc_find_dev(net, imr); if (!in_dev) { err = -ENODEV; goto done; } err = -EADDRINUSE; ifindex = imr->imr_ifindex; for_each_pmc_rtnl(inet, i) { if (i->multi.imr_multiaddr.s_addr == addr && i->multi.imr_ifindex == ifindex) goto done; count++; } err = -ENOBUFS; if (count >= net->ipv4.sysctl_igmp_max_memberships) goto done; iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL); if (!iml) goto done; memcpy(&iml->multi, imr, sizeof(*imr)); iml->next_rcu = inet->mc_list; iml->sflist = NULL; iml->sfmode = MCAST_EXCLUDE; rcu_assign_pointer(inet->mc_list, iml); ip_mc_inc_group(in_dev, addr); err = 0; done: return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens21283.46%215.38%
Eric Dumazet187.09%323.08%
Daniel Lezcano124.72%17.69%
Nikolay Borisov41.57%17.69%
Flavio Leitner31.18%17.69%
Joe Perches10.39%17.69%
Marcelo Ricardo Leitner10.39%17.69%
Arnaldo Carvalho de Melo10.39%17.69%
Ian Morris10.39%17.69%
Al Viro10.39%17.69%
Total254100.00%13100.00%

EXPORT_SYMBOL(ip_mc_join_group);
static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml, struct in_device *in_dev) { struct ip_sf_socklist *psf = rtnl_dereference(iml->sflist); int err; if (!psf) { /* any-source empty exclude case */ return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, iml->sfmode, 0, NULL, 0); } err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, iml->sfmode, psf->sl_count, psf->sl_addr, 0); RCU_INIT_POINTER(iml->sflist, NULL); /* decrease mem now to avoid the memleak warning */ atomic_sub(IP_SFLSIZE(psf->sl_max), &sk->sk_omem_alloc); kfree_rcu(psf, rcu); return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens8865.67%18.33%
Flavio Leitner2820.90%18.33%
Linus Torvalds (pre-git)96.72%433.33%
Eric Dumazet32.24%18.33%
Lai Jiangshan21.49%18.33%
Mika Kukkonen10.75%18.33%
Adrian Bunk10.75%18.33%
Stephen Hemminger10.75%18.33%
Ian Morris10.75%18.33%
Total134100.00%12100.00%


int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) { struct inet_sock *inet = inet_sk(sk); struct ip_mc_socklist *iml; struct ip_mc_socklist __rcu **imlp; struct in_device *in_dev; struct net *net = sock_net(sk); __be32 group = imr->imr_multiaddr.s_addr; u32 ifindex; int ret = -EADDRNOTAVAIL; ASSERT_RTNL(); in_dev = ip_mc_find_dev(net, imr); if (!imr->imr_ifindex && !imr->imr_address.s_addr && !in_dev) { ret = -ENODEV; goto out; } ifindex = imr->imr_ifindex; for (imlp = &inet->mc_list; (iml = rtnl_dereference(*imlp)) != NULL; imlp = &iml->next_rcu) { if (iml->multi.imr_multiaddr.s_addr != group) continue; if (ifindex) { if (iml->multi.imr_ifindex != ifindex) continue; } else if (imr->imr_address.s_addr && imr->imr_address.s_addr != iml->multi.imr_address.s_addr) continue; (void) ip_mc_leave_src(sk, iml, in_dev); *imlp = iml->next_rcu; if (in_dev) ip_mc_dec_group(in_dev, group); /* decrease mem now to avoid the memleak warning */ atomic_sub(sizeof(*iml), &sk->sk_omem_alloc); kfree_rcu(iml, rcu); return 0; } out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens16463.32%316.67%
Ding Tianhong176.56%15.56%
Linus Torvalds (pre-git)176.56%422.22%
Andrew Lunn166.18%15.56%
Eric Dumazet155.79%211.11%
Daniel Lezcano124.63%15.56%
Flavio Leitner124.63%15.56%
Lai Jiangshan20.77%15.56%
Al Viro10.39%15.56%
David S. Miller10.39%15.56%
Arnaldo Carvalho de Melo10.39%15.56%
Marcelo Ricardo Leitner10.39%15.56%
Total259100.00%18100.00%

EXPORT_SYMBOL(ip_mc_leave_group);
int ip_mc_source(int add, int omode, struct sock *sk, struct ip_mreq_source *mreqs, int ifindex) { int err; struct ip_mreqn imr; __be32 addr = mreqs->imr_multiaddr; struct ip_mc_socklist *pmc; struct in_device *in_dev = NULL; struct inet_sock *inet = inet_sk(sk); struct ip_sf_socklist *psl; struct net *net = sock_net(sk); int leavegroup = 0; int i, j, rv; if (!ipv4_is_multicast(addr)) return -EINVAL; ASSERT_RTNL(); imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr; imr.imr_address.s_addr = mreqs->imr_interface; imr.imr_ifindex = ifindex; in_dev = ip_mc_find_dev(net, &imr); if (!in_dev) { err = -ENODEV; goto done; } err = -EADDRNOTAVAIL; for_each_pmc_rtnl(inet, pmc) { if ((pmc->multi.imr_multiaddr.s_addr == imr.imr_multiaddr.s_addr) && (pmc->multi.imr_ifindex == imr.imr_ifindex)) break; } if (!pmc) { /* must have a prior join */ err = -EINVAL; goto done; } /* if a source filter was set, must be the same mode as before */ if (pmc->sflist) { if (pmc->sfmode != omode) { err = -EINVAL; goto done; } } else if (pmc->sfmode != omode) { /* allow mode switches for empty-set filters */ ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0); ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0, NULL, 0); pmc->sfmode = omode; } psl = rtnl_dereference(pmc->sflist); if (!add) { if (!psl) goto done; /* err = -EADDRNOTAVAIL */ rv = !0; for (i = 0; i < psl->sl_count; i++) { rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, sizeof(__be32)); if (rv == 0) break; } if (rv) /* source not found */ goto done; /* err = -EADDRNOTAVAIL */ /* special case - (INCLUDE, empty) == LEAVE_GROUP */ if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { leavegroup = 1; goto done; } /* update the interface filter */ ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1, &mreqs->imr_sourceaddr, 1); for (j = i+1; j < psl->sl_count; j++) psl->sl_addr[j-1] = psl->sl_addr[j]; psl->sl_count--; err = 0; goto done; } /* else, add a new source to the filter */ if (psl && psl->sl_count >= net->ipv4.sysctl_igmp_max_msf) { err = -ENOBUFS; goto done; } if (!psl || psl->sl_count == psl->sl_max) { struct ip_sf_socklist *newpsl; int count = IP_SFBLOCK; if (psl) count += psl->sl_max; newpsl = sock_kmalloc(sk, IP_SFLSIZE(count), GFP_KERNEL); if (!newpsl) { err = -ENOBUFS; goto done; } newpsl->sl_max = count; newpsl->sl_count = count - IP_SFBLOCK; if (psl) { for (i = 0; i < psl->sl_count; i++) newpsl->sl_addr[i] = psl->sl_addr[i]; /* decrease mem now to avoid the memleak warning */ atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc); kfree_rcu(psl, rcu); } rcu_assign_pointer(pmc->sflist, newpsl); psl = newpsl; } rv = 1; /* > 0 for insert logic below if sl_count is 0 */ for (i = 0; i < psl->sl_count; i++) { rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, sizeof(__be32)); if (rv == 0) break; } if (rv == 0) /* address already there is an error */ goto done; for (j = psl->sl_count-1; j >= i; j--) psl->sl_addr[j+1] = psl->sl_addr[j]; psl->sl_addr[i] = mreqs->imr_sourceaddr; psl->sl_count++; err = 0; /* update the interface list */ ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1, &mreqs->imr_sourceaddr, 1); done: if (leavegroup) err = ip_mc_leave_group(sk, &imr); return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens57471.66%721.88%
Linus Torvalds (pre-git)15619.48%1237.50%
Flavio Leitner172.12%13.12%
Daniel Lezcano121.50%13.12%
Chris Wright101.25%13.12%
Eric Dumazet101.25%26.25%
Joe Perches50.62%26.25%
Marcelo Ricardo Leitner40.50%13.12%
Nikolay Borisov40.50%13.12%
Mika Kukkonen30.37%13.12%
Al Viro30.37%13.12%
Lai Jiangshan20.25%13.12%
Arnaldo Carvalho de Melo10.12%13.12%
Total801100.00%32100.00%


int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) { int err = 0; struct ip_mreqn imr; __be32 addr = msf->imsf_multiaddr; struct ip_mc_socklist *pmc; struct in_device *in_dev; struct inet_sock *inet = inet_sk(sk); struct ip_sf_socklist *newpsl, *psl; struct net *net = sock_net(sk); int leavegroup = 0; if (!ipv4_is_multicast(addr)) return -EINVAL; if (msf->imsf_fmode != MCAST_INCLUDE && msf->imsf_fmode != MCAST_EXCLUDE) return -EINVAL; ASSERT_RTNL(); imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; imr.imr_address.s_addr = msf->imsf_interface; imr.imr_ifindex = ifindex; in_dev = ip_mc_find_dev(net, &imr); if (!in_dev) { err = -ENODEV; goto done; } /* special case - (INCLUDE, empty) == LEAVE_GROUP */ if (msf->imsf_fmode == MCAST_INCLUDE && msf->imsf_numsrc == 0) { leavegroup = 1; goto done; } for_each_pmc_rtnl(inet, pmc) { if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && pmc->multi.imr_ifindex == imr.imr_ifindex) break; } if (!pmc) { /* must have a prior join */ err = -EINVAL; goto done; } if (msf->imsf_numsrc) { newpsl = sock_kmalloc(sk, IP_SFLSIZE(msf->imsf_numsrc), GFP_KERNEL); if (!newpsl) { err = -ENOBUFS; goto done; } newpsl->sl_max = newpsl->sl_count = msf->imsf_numsrc; memcpy(newpsl->sl_addr, msf->imsf_slist, msf->imsf_numsrc * sizeof(msf->imsf_slist[0])); err = ip_mc_add_src(in_dev, &msf->imsf_multiaddr, msf->imsf_fmode, newpsl->sl_count, newpsl->sl_addr, 0); if (err) { sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max)); goto done; } } else { newpsl = NULL; (void) ip_mc_add_src(in_dev, &msf->imsf_multiaddr, msf->imsf_fmode, 0, NULL, 0); } psl = rtnl_dereference(pmc->sflist); if (psl) { (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, psl->sl_count, psl->sl_addr, 0); /* decrease mem now to avoid the memleak warning */ atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc); kfree_rcu(psl, rcu); } else (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, 0, NULL, 0); rcu_assign_pointer(pmc->sflist, newpsl); pmc->sfmode = msf->imsf_fmode; err = 0; done: if (leavegroup) err = ip_mc_leave_group(sk, &imr); return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens37772.78%419.05%
Linus Torvalds (pre-git)6011.58%523.81%
Yan Zheng254.83%14.76%
Eric Dumazet173.28%29.52%
Flavio Leitner152.90%14.76%
Daniel Lezcano122.32%14.76%
David S. Miller40.77%14.76%
Lai Jiangshan20.39%14.76%
Mika Kukkonen20.39%14.76%
Al Viro10.19%14.76%
Arnaldo Carvalho de Melo10.19%14.76%
Joe Perches10.19%14.76%
Marcelo Ricardo Leitner10.19%14.76%
Total518100.00%21100.00%


int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf, struct ip_msfilter __user *optval, int __user *optlen) { int err, len, count, copycount; struct ip_mreqn imr; __be32 addr = msf->imsf_multiaddr; struct ip_mc_socklist *pmc; struct in_device *in_dev; struct inet_sock *inet = inet_sk(sk); struct ip_sf_socklist *psl; struct net *net = sock_net(sk); ASSERT_RTNL(); if (!ipv4_is_multicast(addr)) return -EINVAL; imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; imr.imr_address.s_addr = msf->imsf_interface; imr.imr_ifindex = 0; in_dev = ip_mc_find_dev(net, &imr); if (!in_dev) { err = -ENODEV; goto done; } err = -EADDRNOTAVAIL; for_each_pmc_rtnl(inet, pmc) { if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && pmc->multi.imr_ifindex == imr.imr_ifindex) break; } if (!pmc) /* must have a prior join */ goto done; msf->imsf_fmode = pmc->sfmode; psl = rtnl_dereference(pmc->sflist); if (!psl) { len = 0; count = 0; } else { count = psl->sl_count; } copycount = count < msf->imsf_numsrc ? count : msf->imsf_numsrc; len = copycount * sizeof(psl->sl_addr[0]); msf->imsf_numsrc = count; if (put_user(IP_MSFILTER_SIZE(copycount), optlen) || copy_to_user(optval, msf, IP_MSFILTER_SIZE(0))) { return -EFAULT; } if (len && copy_to_user(&optval->imsf_slist[0], psl->sl_addr, len)) return -EFAULT; return 0; done: return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens18555.72%215.38%
Linus Torvalds (pre-git)10932.83%323.08%
Daniel Lezcano123.61%17.69%
Eric Dumazet92.71%17.69%
David S. Miller92.71%17.69%
Al Viro30.90%215.38%
Américo Wang30.90%17.69%
Joe Perches10.30%17.69%
Arnaldo Carvalho de Melo10.30%17.69%
Total332100.00%13100.00%


int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf, struct group_filter __user *optval, int __user *optlen) { int err, i, count, copycount; struct sockaddr_in *psin; __be32 addr; struct ip_mc_socklist *pmc; struct inet_sock *inet = inet_sk(sk); struct ip_sf_socklist *psl; ASSERT_RTNL(); psin = (struct sockaddr_in *)&gsf->gf_group; if (psin->sin_family != AF_INET) return -EINVAL; addr = psin->sin_addr.s_addr; if (!ipv4_is_multicast(addr)) return -EINVAL; err = -EADDRNOTAVAIL; for_each_pmc_rtnl(inet, pmc) { if (pmc->multi.imr_multiaddr.s_addr == addr && pmc->multi.imr_ifindex == gsf->gf_interface) break; } if (!pmc) /* must have a prior join */ goto done; gsf->gf_fmode = pmc->sfmode; psl = rtnl_dereference(pmc->sflist); count = psl ? psl->sl_count : 0; copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; gsf->gf_numsrc = count; if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { return -EFAULT; } for (i = 0; i < copycount; i++) { struct sockaddr_storage ss; psin = (struct sockaddr_in *)&ss; memset(&ss, 0, sizeof(ss)); psin->sin_family = AF_INET; psin->sin_addr.s_addr = psl->sl_addr[i]; if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) return -EFAULT; } return 0; done: return err; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens27283.44%218.18%
Linus Torvalds (pre-git)288.59%218.18%
Eric Dumazet92.76%19.09%
David S. Miller92.76%19.09%
Al Viro30.92%218.18%
Américo Wang30.92%19.09%
Joe Perches10.31%19.09%
Arnaldo Carvalho de Melo10.31%19.09%
Total326100.00%11100.00%

/* * check if a multicast source filter allows delivery for a given <src,dst,intf> */
int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr, int dif) { struct inet_sock *inet = inet_sk(sk); struct ip_mc_socklist *pmc; struct ip_sf_socklist *psl; int i; int ret; ret = 1; if (!ipv4_is_multicast(loc_addr)) goto out; rcu_read_lock(); for_each_pmc_rcu(inet, pmc) { if (pmc->multi.imr_multiaddr.s_addr == loc_addr && pmc->multi.imr_ifindex == dif) break; } ret = inet->mc_all; if (!pmc) goto unlock; psl = rcu_dereference(pmc->sflist); ret = (pmc->sfmode == MCAST_EXCLUDE); if (!psl) goto unlock; for (i = 0; i < psl->sl_count; i++) { if (psl->sl_addr[i] == rmt_addr) break; } ret = 0; if (pmc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) goto unlock; if (pmc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) goto unlock; ret = 1; unlock: rcu_read_unlock(); out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens14165.89%436.36%
Flavio Leitner5927.57%19.09%
Eric Dumazet73.27%19.09%
Linus Torvalds (pre-git)31.40%218.18%
Al Viro20.93%19.09%
Arnaldo Carvalho de Melo10.47%19.09%
Joe Perches10.47%19.09%
Total214100.00%11100.00%

/* * A socket is closing. */
void ip_mc_drop_socket(struct sock *sk) { struct inet_sock *inet = inet_sk(sk); struct ip_mc_socklist *iml; struct net *net = sock_net(sk); if (!inet->mc_list) return; rtnl_lock(); while ((iml = rtnl_dereference(inet->mc_list)) != NULL) { struct in_device *in_dev; inet->mc_list = iml->next_rcu; in_dev = inetdev_by_index(net, iml->multi.imr_ifindex); (void) ip_mc_leave_src(sk, iml, in_dev); if (in_dev) ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr); /* decrease mem now to avoid the memleak warning */ atomic_sub(sizeof(*iml), &sk->sk_omem_alloc); kfree_rcu(iml, rcu); } rtnl_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens5941.26%17.14%
Linus Torvalds (pre-git)4531.47%428.57%
Flavio Leitner128.39%17.14%
Daniel Lezcano117.69%17.14%
Michal Ruzicka53.50%17.14%
Eric Dumazet53.50%17.14%
Lai Jiangshan21.40%17.14%
Ian Morris10.70%17.14%
Arnaldo Carvalho de Melo10.70%17.14%
David S. Miller10.70%17.14%
Denis V. Lunev10.70%17.14%
Total143100.00%14100.00%

/* called with rcu_read_lock() */
int ip_check_mc_rcu(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u8 proto) { struct ip_mc_list *im; struct ip_mc_list __rcu **mc_hash; struct ip_sf_list *psf; int rv = 0; mc_hash = rcu_dereference(in_dev->mc_hash); if (mc_hash) { u32 hash = hash_32((__force u32)mc_addr, MC_HASH_SZ_LOG); for (im = rcu_dereference(mc_hash[hash]); im != NULL; im = rcu_dereference(im->next_hash)) { if (im->multiaddr == mc_addr) break; } } else { for_each_pmc_rcu(in_dev, im) { if (im->multiaddr == mc_addr) break; } } if (im && proto == IPPROTO_IGMP) { rv = 1; } else if (im) { if (src_addr) { for (psf = im->sources; psf; psf = psf->sf_next) { if (psf->sf_inaddr == src_addr) break; } if (psf) rv = psf->sf_count[MCAST_INCLUDE] || psf->sf_count[MCAST_EXCLUDE] != im->sfcount[MCAST_EXCLUDE]; else rv = im->sfcount[MCAST_EXCLUDE] != 0; } else rv = 1; /* unspecified source; tentatively allow */ } return rv; }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens12454.39%215.38%
Eric Dumazet7934.65%323.08%
Linus Torvalds (pre-git)187.89%430.77%
David S. Miller41.75%215.38%
Al Viro20.88%17.69%
Alexander Duyck10.44%17.69%
Total228100.00%13100.00%

#if defined(CONFIG_PROC_FS) struct igmp_mc_iter_state { struct seq_net_private p; struct net_device *dev; struct in_device *in_dev; }; #define igmp_mc_seq_private(seq) ((struct igmp_mc_iter_state *)(seq)->private)
static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq) { struct net *net = seq_file_net(seq); struct ip_mc_list *im = NULL; struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); state->in_dev = NULL; for_each_netdev_rcu(net, state->dev) { struct in_device *in_dev; in_dev = __in_dev_get_rcu(state->dev); if (!in_dev) continue; im = rcu_dereference(in_dev->mc_list); if (im) { state->in_dev = in_dev; break; } } return im; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3838.00%18.33%
David L Stevens2525.00%18.33%
Linus Torvalds (pre-git)1616.00%433.33%
Alexey Dobriyan1111.00%18.33%
Eric Dumazet44.00%216.67%
Pavel Emelyanov44.00%18.33%
Stephen Hemminger11.00%18.33%
Eric W. Biedermann11.00%18.33%
Total100100.00%12100.00%


static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im) { struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); im = rcu_dereference(im->next_rcu); while (!im) { state->dev = next_net_device_rcu(state->dev); if (!state->dev) { state->in_dev = NULL; break; } state->in_dev = __in_dev_get_rcu(state->dev); if (!state->in_dev) continue; im = rcu_dereference(state->in_dev->mc_list); } return im; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9389.42%125.00%
Eric Dumazet98.65%250.00%
Pavel Emelyanov21.92%125.00%
Total104100.00%4100.00%


static struct ip_mc_list *igmp_mc_get_idx(struct seq_file *seq, loff_t pos) { struct ip_mc_list *im = igmp_mc_get_first(seq); if (im) while (pos && (im = igmp_mc_get_next(seq, im)) != NULL) --pos; return pos ? NULL : im; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明57100.00%1100.00%
Total57100.00%1100.00%


static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos) __acquires (rcu) { rcu_read_lock(); return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3179.49%233.33%
Stephen Hemminger615.38%233.33%
David L Stevens12.56%116.67%
Joe Perches12.56%116.67%
Total39100.00%6100.00%


static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct ip_mc_list *im; if (v == SEQ_START_TOKEN) im = igmp_mc_get_first(seq); else im = igmp_mc_get_next(seq, v); ++*pos; return im; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5498.18%150.00%
Joe Perches11.82%150.00%
Total55100.00%2100.00%


static void igmp_mc_seq_stop(struct seq_file *seq, void *v) __releases (rcu) { struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); state->in_dev = NULL; state->dev = NULL; rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3886.36%250.00%
Stephen Hemminger613.64%250.00%
Total44100.00%4100.00%


static int igmp_mc_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) seq_puts(seq, "Idx\tDevice : Count Querier\tGroup Users Timer\tReporter\n"); else { struct ip_mc_list *im = (struct ip_mc_list *)v; struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); char *querier; long delta; #ifdef CONFIG_IP_MULTICAST querier = IGMP_V1_SEEN(state->in_dev) ? "V1" : IGMP_V2_SEEN(state->in_dev) ? "V2" : "V3"; #else querier = "NONE"; #endif if (rcu_access_pointer(state->in_dev->mc_list) == im) { seq_printf(seq, "%d\t%-10s: %5d %7s\n", state->dev->ifindex, state->dev->name, state->in_dev->mc_count, querier); } delta = im->timer.expires - jiffies; seq_printf(seq, "\t\t\t\t%08X %5d %d:%08lX\t\t%d\n", im->multiaddr, im->users, im->tm_running, im->tm_running ? jiffies_delta_to_clock_t(delta) : 0, im->reporter); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明14378.57%327.27%
David L Stevens189.89%218.18%
Eric Dumazet179.34%218.18%
Joe Perches10.55%19.09%
Andreea-Cristina Bernat10.55%19.09%
Rami Rosen10.55%19.09%
Alexey Dobriyan10.55%19.09%
Total182100.00%11100.00%

static const struct seq_operations igmp_mc_seq_ops = { .start = igmp_mc_seq_start, .next = igmp_mc_seq_next, .stop = igmp_mc_seq_stop, .show = igmp_mc_seq_show, };
static int igmp_mc_seq_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &igmp_mc_seq_ops, sizeof(struct igmp_mc_iter_state)); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明2266.67%125.00%
Pavel Emelyanov721.21%125.00%
Alexey Dobriyan39.09%125.00%
Linus Torvalds (pre-git)13.03%125.00%
Total33100.00%4100.00%

static const struct file_operations igmp_mc_seq_fops = { .owner = THIS_MODULE, .open = igmp_mc_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, }; struct igmp_mcf_iter_state { struct seq_net_private p; struct net_device *dev; struct in_device *idev; struct ip_mc_list *im; }; #define igmp_mcf_seq_private(seq) ((struct igmp_mcf_iter_state *)(seq)->private)
static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq) { struct net *net = seq_file_net(seq); struct ip_sf_list *psf = NULL; struct ip_mc_list *im = NULL; struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); state->idev = NULL; state->im = NULL; for_each_netdev_rcu(net, state->dev) { struct in_device *idev; idev = __in_dev_get_rcu(state->dev); if (unlikely(!idev)) continue; im = rcu_dereference(idev->mc_list); if (likely(im)) { spin_lock_bh(&im->lock); psf = im->sources; if (likely(psf)) { state->im = im; state->idev = idev; break; } spin_unlock_bh(&im->lock); } } return psf; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明8655.13%17.69%
David L Stevens2918.59%17.69%
Linus Torvalds (pre-git)1811.54%430.77%
Alexey Dobriyan117.05%17.69%
Pavel Emelyanov53.21%17.69%
Eric Dumazet42.56%215.38%
Stephen Hemminger10.64%17.69%
Eric W. Biedermann10.64%17.69%
Ian Morris10.64%17.69%
Total156100.00%13100.00%


static struct ip_sf_list *igmp_mcf_get_next(struct seq_file *seq, struct ip_sf_list *psf) { struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); psf = psf->sf_next; while (!psf) { spin_unlock_bh(&state->im->lock); state->im = state->im->next; while (!state->im) { state->dev = next_net_device_rcu(state->dev); if (!state->dev) { state->idev = NULL; goto out; } state->idev = __in_dev_get_rcu(state->dev); if (!state->idev) continue; state->im = rcu_dereference(state->idev->mc_list); } if (!state->im) break; spin_lock_bh(&state->im->lock); psf = state->im->sources; } out: return psf; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明15595.68%125.00%
Eric Dumazet53.09%250.00%
Pavel Emelyanov21.23%125.00%
Total162100.00%4100.00%


static struct ip_sf_list *igmp_mcf_get_idx(struct seq_file *seq, loff_t pos) { struct ip_sf_list *psf = igmp_mcf_get_first(seq); if (psf) while (pos && (psf = igmp_mcf_get_next(seq, psf)) != NULL) --pos; return pos ? NULL : psf; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明57100.00%1100.00%
Total57100.00%1100.00%


static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos) __acquires (rcu) { rcu_read_lock(); return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3179.49%240.00%
Stephen Hemminger615.38%120.00%
David L Stevens12.56%120.00%
Joe Perches12.56%120.00%
Total39100.00%5100.00%


static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct ip_sf_list *psf; if (v == SEQ_START_TOKEN) psf = igmp_mcf_get_first(seq); else psf = igmp_mcf_get_next(seq, v); ++*pos; return psf; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4581.82%133.33%
David L Stevens916.36%133.33%
Joe Perches11.82%133.33%
Total55100.00%3100.00%


static void igmp_mcf_seq_stop(struct seq_file *seq, void *v) __releases (rcu) { struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); if (likely(state->im)) { spin_unlock_bh(&state->im->lock); state->im = NULL; } state->idev = NULL; state->dev = NULL; rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明6084.51%250.00%
Stephen Hemminger68.45%125.00%
David L Stevens57.04%125.00%
Total71100.00%4100.00%


static int igmp_mcf_seq_show(struct seq_file *seq, void *v) { struct ip_sf_list *psf = (struct ip_sf_list *)v; struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); if (v == SEQ_START_TOKEN) { seq_puts(seq, "Idx Device MCA SRC INC EXC\n"); } else { seq_printf(seq, "%3d %6.6s 0x%08x " "0x%08x %6lu %6lu\n", state->dev->ifindex, state->dev->name, ntohl(state->im->multiaddr), ntohl(psf->sf_inaddr), psf->sf_count[MCAST_INCLUDE], psf->sf_count[MCAST_EXCLUDE]); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9688.89%114.29%
David L Stevens54.63%114.29%
Linus Torvalds (pre-git)43.70%342.86%
Joe Perches32.78%228.57%
Total108100.00%7100.00%

static const struct seq_operations igmp_mcf_seq_ops = { .start = igmp_mcf_seq_start, .next = igmp_mcf_seq_next, .stop = igmp_mcf_seq_stop, .show = igmp_mcf_seq_show, };
static int igmp_mcf_seq_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &igmp_mcf_seq_ops, sizeof(struct igmp_mcf_iter_state)); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明2060.61%120.00%
Pavel Emelyanov721.21%120.00%
Alexey Dobriyan39.09%120.00%
Linus Torvalds (pre-git)39.09%240.00%
Total33100.00%5100.00%

static const struct file_operations igmp_mcf_seq_fops = { .owner = THIS_MODULE, .open = igmp_mcf_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, };
static int __net_init igmp_net_init(struct net *net) { struct proc_dir_entry *pde; int err; pde = proc_create("igmp", S_IRUGO, net->proc_net, &igmp_mc_seq_fops); if (!pde) goto out_igmp; pde = proc_create("mcfilter", S_IRUGO, net->proc_net, &igmp_mcf_seq_fops); if (!pde) goto out_mcfilter; err = inet_ctl_sock_create(&net->ipv4.mc_autojoin_sk, AF_INET, SOCK_DGRAM, 0, net); if (err < 0) { pr_err("Failed to initialize the IGMP autojoin socket (err %d)\n", err); goto out_sock; } /* Sysctl initialization */ net->ipv4.sysctl_igmp_max_memberships = 20; net->ipv4.sysctl_igmp_max_msf = 10; /* IGMP reports for link-local multicast groups are enabled by default */ net->ipv4.sysctl_igmp_llm_reports = 1; net->ipv4.sysctl_igmp_qrv = 2; return 0; out_sock: remove_proc_entry("mcfilter", net->proc_net); out_mcfilter: remove_proc_entry("igmp", net->proc_net); out_igmp: return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
Madhu Challa5230.41%111.11%
Alexey Dobriyan4526.32%222.22%
Nikolay Borisov3419.88%111.11%
Hideaki Yoshifuji / 吉藤英明2514.62%333.33%
Gao Feng158.77%222.22%
Total171100.00%9100.00%


static void __net_exit igmp_net_exit(struct net *net) { remove_proc_entry("mcfilter", net->proc_net); remove_proc_entry("igmp", net->proc_net); inet_ctl_sock_destroy(net->ipv4.mc_autojoin_sk); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan2051.28%250.00%
Gao Feng1025.64%125.00%
Madhu Challa923.08%125.00%
Total39100.00%4100.00%

static struct pernet_operations igmp_net_ops = { .init = igmp_net_init, .exit = igmp_net_exit, }; #endif
static int igmp_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); struct in_device *in_dev; switch (event) { case NETDEV_RESEND_IGMP: in_dev = __in_dev_get_rtnl(dev); if (in_dev) ip_mc_rejoin_groups(in_dev); break; default: break; } return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko65100.00%1100.00%
Total65100.00%1100.00%

static struct notifier_block igmp_notifier = { .notifier_call = igmp_netdev_event, };
int __init igmp_mc_init(void) { #if defined(CONFIG_PROC_FS) int err; err = register_pernet_subsys(&igmp_net_ops); if (err) return err; err = register_netdevice_notifier(&igmp_notifier); if (err) goto reg_notif_fail; return 0; reg_notif_fail: unregister_pernet_subsys(&igmp_net_ops); return err; #else return register_netdevice_notifier(&igmp_notifier); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4156.94%125.00%
Américo Wang1723.61%125.00%
Alexey Dobriyan1216.67%125.00%
Hideaki Yoshifuji / 吉藤英明22.78%125.00%
Total72100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
David L Stevens852158.42%2210.63%
Hideaki Yoshifuji / 吉藤英明12338.45%104.83%
Linus Torvalds (pre-git)11197.67%2411.59%
Eric Dumazet7305.00%157.25%
Linus Lüssing6274.30%20.97%
Nikolay Borisov3102.13%52.42%
David S. Miller2201.51%167.73%
Hangbin Liu1931.32%31.45%
Flavio Leitner1581.08%20.97%
Alexey Dobriyan1410.97%41.93%
Jiri Pirko1260.86%31.45%
Stephen Hemminger1110.76%73.38%
Philip Downey1060.73%10.48%
Daniel Lezcano1010.69%10.48%
Arnaldo Carvalho de Melo910.62%83.86%
William Manley800.55%20.97%
Madhu Challa640.44%10.48%
Herbert Xu560.38%62.90%
Moni Shoua430.29%10.48%
Pavel Emelyanov420.29%31.45%
Al Viro400.27%73.38%
Hannes Frederic Sowa380.26%31.45%
Jay Vosburgh370.25%10.48%
Michal Tesar310.21%10.48%
Mika Kukkonen260.18%10.48%
Américo Wang250.17%20.97%
Gao Feng250.17%20.97%
Eric W. Biedermann250.17%41.93%
Yan Zheng250.17%10.48%
Linus Torvalds180.12%41.93%
Joe Perches180.12%41.93%
Ding Tianhong170.12%10.48%
Andrew Lunn160.11%10.48%
Daniel Borkmann150.10%20.97%
Rami Rosen140.10%10.48%
Fabian Frederick130.09%10.48%
Lai Jiangshan120.08%31.45%
Denis V. Lunev110.08%41.93%
Ben Hutchings100.07%10.48%
Chris Wright100.07%10.48%
Petr Vandrovec100.07%10.48%
Marcelo Ricardo Leitner80.05%10.48%
Veaceslav Falico70.05%10.48%
Ian Morris60.04%10.48%
Benjamin Poirier60.04%10.48%
Simon Horman60.04%10.48%
Michal Ruzicka50.03%10.48%
Jun Zhao50.03%10.48%
Andrew Morton40.03%10.48%
Adrian Bunk40.03%10.48%
Aruna-Hewapathirane30.02%10.48%
Tejun Heo30.02%10.48%
Geert Uytterhoeven30.02%10.48%
Arjan van de Ven20.01%10.48%
Panagiotis Issaris20.01%10.48%
Zheng Yan20.01%10.48%
Ansis Atteka20.01%10.48%
Salam Noureddine20.01%10.48%
Denis Lukianov10.01%10.48%
Alan Cox10.01%10.48%
Andreea-Cristina Bernat10.01%10.48%
Rusty Russell10.01%10.48%
Alexander Duyck10.01%10.48%
Julia Lawall10.01%10.48%
Li RongQing10.01%10.48%
Tom Herbert10.01%10.48%
Total14586100.00%207100.00%
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