cregit-Linux how code gets into the kernel

Release 4.15 net/ipv6/ip6_flowlabel.c

Directory: net/ipv6
/*
 *      ip6_flowlabel.c         IPv6 flowlabel manager.
 *
 *      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.
 *
 *      Authors:        Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 */

#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/in6.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/pid_namespace.h>

#include <net/net_namespace.h>
#include <net/sock.h>

#include <net/ipv6.h>
#include <net/rawv6.h>
#include <net/transp_v6.h>

#include <linux/uaccess.h>


#define FL_MIN_LINGER	6	
/* Minimal linger. It is set to 6sec specified
                                   in old IPv6 RFC. Well, it was reasonable value.
                                 */

#define FL_MAX_LINGER	150	
/* Maximal linger timeout */

/* FL hash table */


#define FL_MAX_PER_SOCK	32

#define FL_MAX_SIZE	4096

#define FL_HASH_MASK	255

#define FL_HASH(l)	(ntohl(l)&FL_HASH_MASK)


static atomic_t fl_size = ATOMIC_INIT(0);

static struct ip6_flowlabel __rcu *fl_ht[FL_HASH_MASK+1];

static void ip6_fl_gc(struct timer_list *unused);
static DEFINE_TIMER(ip6_fl_gc_timer, ip6_fl_gc);

/* FL hash table lock: it protects only of GC */

static DEFINE_SPINLOCK(ip6_fl_lock);

/* Big socket sock */

static DEFINE_SPINLOCK(ip6_sk_fl_lock);


#define for_each_fl_rcu(hash, fl)				\
	for (fl = rcu_dereference_bh(fl_ht[(hash)]);            \
             fl != NULL;                                        \
             fl = rcu_dereference_bh(fl->next))

#define for_each_fl_continue_rcu(fl)				\
	for (fl = rcu_dereference_bh(fl->next);                 \
             fl != NULL;                                        \
             fl = rcu_dereference_bh(fl->next))


#define for_each_sk_fl_rcu(np, sfl)				\
	for (sfl = rcu_dereference_bh(np->ipv6_fl_list);        \
             sfl != NULL;                                       \
             sfl = rcu_dereference_bh(sfl->next))


static inline struct ip6_flowlabel *__fl_lookup(struct net *net, __be32 label) { struct ip6_flowlabel *fl; for_each_fl_rcu(FL_HASH(label), fl) { if (fl->label == label && net_eq(fl->fl_net, net)) return fl; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2343.40%240.00%
Benjamin Thery2241.51%120.00%
Hideaki Yoshifuji / 吉藤英明47.55%120.00%
Octavian Purdila47.55%120.00%
Total53100.00%5100.00%


static struct ip6_flowlabel *fl_lookup(struct net *net, __be32 label) { struct ip6_flowlabel *fl; rcu_read_lock_bh(); fl = __fl_lookup(net, label); if (fl && !atomic_inc_not_zero(&fl->users)) fl = NULL; rcu_read_unlock_bh(); return fl; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3664.29%240.00%
Hideaki Yoshifuji / 吉藤英明1119.64%120.00%
Benjamin Thery814.29%120.00%
Al Viro11.79%120.00%
Total56100.00%5100.00%


static void fl_free(struct ip6_flowlabel *fl) { if (fl) { if (fl->share == IPV6_FL_S_PROCESS) put_pid(fl->owner.pid); kfree(fl->opt); kfree_rcu(fl, rcu); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2245.83%125.00%
Eric W. Biedermann1429.17%125.00%
Dan Carpenter816.67%125.00%
Hideaki Yoshifuji / 吉藤英明48.33%125.00%
Total48100.00%4100.00%


static void fl_release(struct ip6_flowlabel *fl) { spin_lock_bh(&ip6_fl_lock); fl->lastuse = jiffies; if (atomic_dec_and_test(&fl->users)) { unsigned long ttd = fl->lastuse + fl->linger; if (time_after(ttd, fl->expires)) fl->expires = ttd; ttd = fl->expires; if (fl->opt && fl->share == IPV6_FL_S_EXCL) { struct ipv6_txoptions *opt = fl->opt; fl->opt = NULL; kfree(opt); } if (!timer_pending(&ip6_fl_gc_timer) || time_after(ip6_fl_gc_timer.expires, ttd)) mod_timer(&ip6_fl_gc_timer, ttd); } spin_unlock_bh(&ip6_fl_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11786.03%133.33%
Vinay K. Nallamothu1712.50%133.33%
Hideaki Yoshifuji / 吉藤英明21.47%133.33%
Total136100.00%3100.00%


static void ip6_fl_gc(struct timer_list *unused) { int i; unsigned long now = jiffies; unsigned long sched = 0; spin_lock(&ip6_fl_lock); for (i = 0; i <= FL_HASH_MASK; i++) { struct ip6_flowlabel *fl; struct ip6_flowlabel __rcu **flp; flp = &fl_ht[i]; while ((fl = rcu_dereference_protected(*flp, lockdep_is_held(&ip6_fl_lock))) != NULL) { if (atomic_read(&fl->users) == 0) { unsigned long ttd = fl->lastuse + fl->linger; if (time_after(ttd, fl->expires)) fl->expires = ttd; ttd = fl->expires; if (time_after_eq(now, ttd)) { *flp = fl->next; fl_free(fl); atomic_dec(&fl_size); continue; } if (!sched || time_before(ttd, sched)) sched = ttd; } flp = &fl->next; } } if (!sched && atomic_read(&fl_size)) sched = now + FL_MAX_LINGER; if (sched) { mod_timer(&ip6_fl_gc_timer, sched); } spin_unlock(&ip6_fl_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19685.96%116.67%
Hideaki Yoshifuji / 吉藤英明114.82%116.67%
Benjamin Thery73.07%116.67%
Vinay K. Nallamothu62.63%116.67%
Kees Cook41.75%116.67%
Eric Dumazet41.75%116.67%
Total228100.00%6100.00%


static void __net_exit ip6_fl_purge(struct net *net) { int i; spin_lock_bh(&ip6_fl_lock); for (i = 0; i <= FL_HASH_MASK; i++) { struct ip6_flowlabel *fl; struct ip6_flowlabel __rcu **flp; flp = &fl_ht[i]; while ((fl = rcu_dereference_protected(*flp, lockdep_is_held(&ip6_fl_lock))) != NULL) { if (net_eq(fl->fl_net, net) && atomic_read(&fl->users) == 0) { *flp = fl->next; fl_free(fl); atomic_dec(&fl_size); continue; } flp = &fl->next; } } spin_unlock_bh(&ip6_fl_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Thery10780.45%112.50%
Hideaki Yoshifuji / 吉藤英明96.77%112.50%
Linus Torvalds (pre-git)64.51%225.00%
Octavian Purdila43.01%112.50%
Eric Dumazet43.01%112.50%
Jan Stancek21.50%112.50%
Alexey Dobriyan10.75%112.50%
Total133100.00%8100.00%


static struct ip6_flowlabel *fl_intern(struct net *net, struct ip6_flowlabel *fl, __be32 label) { struct ip6_flowlabel *lfl; fl->label = label & IPV6_FLOWLABEL_MASK; spin_lock_bh(&ip6_fl_lock); if (label == 0) { for (;;) { fl->label = htonl(prandom_u32())&IPV6_FLOWLABEL_MASK; if (fl->label) { lfl = __fl_lookup(net, fl->label); if (!lfl) break; } } } else { /* * we dropper the ip6_fl_lock, so this entry could reappear * and we need to recheck with it. * * OTOH no need to search the active socket first, like it is * done in ipv6_flowlabel_opt - sock is locked, so new entry * with the same label can only appear on another sock */ lfl = __fl_lookup(net, fl->label); if (lfl) { atomic_inc(&lfl->users); spin_unlock_bh(&ip6_fl_lock); return lfl; } } fl->lastuse = jiffies; fl->next = fl_ht[FL_HASH(fl->label)]; rcu_assign_pointer(fl_ht[FL_HASH(fl->label)], fl); atomic_inc(&fl_size); spin_unlock_bh(&ip6_fl_lock); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11765.00%225.00%
Pavel Emelyanov4424.44%112.50%
Benjamin Thery95.00%112.50%
Hideaki Yoshifuji / 吉藤英明73.89%112.50%
Ian Morris10.56%112.50%
Al Viro10.56%112.50%
Aruna-Hewapathirane10.56%112.50%
Total180100.00%8100.00%

/* Socket flowlabel lists */
struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label) { struct ipv6_fl_socklist *sfl; struct ipv6_pinfo *np = inet6_sk(sk); label &= IPV6_FLOWLABEL_MASK; rcu_read_lock_bh(); for_each_sk_fl_rcu(np, sfl) { struct ip6_flowlabel *fl = sfl->fl; if (fl->label == label) { fl->lastuse = jiffies; atomic_inc(&fl->users); rcu_read_unlock_bh(); return fl; } } rcu_read_unlock_bh(); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7178.89%116.67%
Hideaki Yoshifuji / 吉藤英明1112.22%116.67%
Pavel Emelyanov44.44%233.33%
David S. Miller33.33%116.67%
Al Viro11.11%116.67%
Total90100.00%6100.00%

EXPORT_SYMBOL_GPL(fl6_sock_lookup);
void fl6_free_socklist(struct sock *sk) { struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_fl_socklist *sfl; if (!rcu_access_pointer(np->ipv6_fl_list)) return; spin_lock_bh(&ip6_sk_fl_lock); while ((sfl = rcu_dereference_protected(np->ipv6_fl_list, lockdep_is_held(&ip6_sk_fl_lock))) != NULL) { np->ipv6_fl_list = sfl->next; spin_unlock_bh(&ip6_sk_fl_lock); fl_release(sfl->fl); kfree_rcu(sfl, rcu); spin_lock_bh(&ip6_sk_fl_lock); } spin_unlock_bh(&ip6_sk_fl_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5855.24%250.00%
Linus Torvalds (pre-git)4441.90%125.00%
David S. Miller32.86%125.00%
Total105100.00%4100.00%

/* Service routines */ /* It is the only difficult place. flowlabel enforces equal headers before and including routing header, however user may supply options following rthdr. */
struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, struct ip6_flowlabel *fl, struct ipv6_txoptions *fopt) { struct ipv6_txoptions *fl_opt = fl->opt; if (!fopt || fopt->opt_flen == 0) return fl_opt; if (fl_opt) { opt_space->hopopt = fl_opt->hopopt; opt_space->dst0opt = fl_opt->dst0opt; opt_space->srcrt = fl_opt->srcrt; opt_space->opt_nflen = fl_opt->opt_nflen; } else { if (fopt->opt_nflen == 0) return fopt; opt_space->hopopt = NULL; opt_space->dst0opt = NULL; opt_space->srcrt = NULL; opt_space->opt_nflen = 0; } opt_space->dst1opt = fopt->dst1opt; opt_space->opt_flen = fopt->opt_flen; opt_space->tot_len = fopt->tot_len; return opt_space; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13993.92%133.33%
Eric Dumazet85.41%133.33%
Ian Morris10.68%133.33%
Total148100.00%3100.00%

EXPORT_SYMBOL_GPL(fl6_merge_options);
static unsigned long check_linger(unsigned long ttl) { if (ttl < FL_MIN_LINGER) return FL_MIN_LINGER*HZ; if (ttl > FL_MAX_LINGER && !capable(CAP_NET_ADMIN)) return 0; return ttl*HZ; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3890.48%150.00%
David S. Miller49.52%150.00%
Total42100.00%2100.00%


static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned long expires) { linger = check_linger(linger); if (!linger) return -EPERM; expires = check_linger(expires); if (!expires) return -EPERM; spin_lock_bh(&ip6_fl_lock); fl->lastuse = jiffies; if (time_before(fl->linger, linger)) fl->linger = linger; if (time_before(expires, fl->linger)) expires = fl->linger; if (time_before(fl->expires, fl->lastuse + expires)) fl->expires = fl->lastuse + expires; spin_unlock_bh(&ip6_fl_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10781.68%125.00%
Florent Fourcot129.16%125.00%
Vinay K. Nallamothu107.63%125.00%
David S. Miller21.53%125.00%
Total131100.00%4100.00%


static struct ip6_flowlabel * fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq, char __user *optval, int optlen, int *err_p) { struct ip6_flowlabel *fl = NULL; int olen; int addr_type; int err; olen = optlen - CMSG_ALIGN(sizeof(*freq)); err = -EINVAL; if (olen > 64 * 1024) goto done; err = -ENOMEM; fl = kzalloc(sizeof(*fl), GFP_KERNEL); if (!fl) goto done; if (olen > 0) { struct msghdr msg; struct flowi6 flowi6; struct sockcm_cookie sockc_junk; struct ipcm6_cookie ipc6; err = -ENOMEM; fl->opt = kmalloc(sizeof(*fl->opt) + olen, GFP_KERNEL); if (!fl->opt) goto done; memset(fl->opt, 0, sizeof(*fl->opt)); fl->opt->tot_len = sizeof(*fl->opt) + olen; err = -EFAULT; if (copy_from_user(fl->opt+1, optval+CMSG_ALIGN(sizeof(*freq)), olen)) goto done; msg.msg_controllen = olen; msg.msg_control = (void *)(fl->opt+1); memset(&flowi6, 0, sizeof(flowi6)); ipc6.opt = fl->opt; err = ip6_datagram_send_ctl(net, sk, &msg, &flowi6, &ipc6, &sockc_junk); if (err) goto done; err = -EINVAL; if (fl->opt->opt_flen) goto done; if (fl->opt->opt_nflen == 0) { kfree(fl->opt); fl->opt = NULL; } } fl->fl_net = net; fl->expires = jiffies; err = fl6_renew(fl, freq->flr_linger, freq->flr_expires); if (err) goto done; fl->share = freq->flr_share; addr_type = ipv6_addr_type(&freq->flr_dst); if ((addr_type & IPV6_ADDR_MAPPED) || addr_type == IPV6_ADDR_ANY) { err = -EINVAL; goto done; } fl->dst = freq->flr_dst; atomic_set(&fl->users, 1); switch (fl->share) { case IPV6_FL_S_EXCL: case IPV6_FL_S_ANY: break; case IPV6_FL_S_PROCESS: fl->owner.pid = get_task_pid(current, PIDTYPE_PID); break; case IPV6_FL_S_USER: fl->owner.uid = current_euid(); break; default: err = -EINVAL; goto done; } return fl; done: fl_free(fl); *err_p = err; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)39678.42%15.88%
David S. Miller458.91%211.76%
Wei Wang122.38%15.88%
Benjamin Thery112.18%15.88%
Eric W. Biedermann91.78%15.88%
Soheil Hassas Yeganeh71.39%15.88%
James Morris71.39%15.88%
Maciej Żenczykowski71.39%15.88%
David Howells20.40%15.88%
Hideaki Yoshifuji / 吉藤英明20.40%15.88%
Ian Morris20.40%15.88%
Alexey Dobriyan10.20%15.88%
Brian Haley10.20%15.88%
Al Viro10.20%15.88%
Tom Parkin10.20%15.88%
Ingo Oeser10.20%15.88%
Total505100.00%17100.00%


static int mem_check(struct sock *sk) { struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_fl_socklist *sfl; int room = FL_MAX_SIZE - atomic_read(&fl_size); int count = 0; if (room > FL_MAX_SIZE - FL_MAX_PER_SOCK) return 0; rcu_read_lock_bh(); for_each_sk_fl_rcu(np, sfl) count++; rcu_read_unlock_bh(); if (room <= 0 || ((count >= FL_MAX_PER_SOCK || (count > 0 && room < FL_MAX_SIZE/2) || room < FL_MAX_SIZE/4) && !capable(CAP_NET_ADMIN))) return -ENOBUFS; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9180.53%125.00%
David S. Miller108.85%125.00%
Hideaki Yoshifuji / 吉藤英明65.31%125.00%
Hannes Frederic Sowa65.31%125.00%
Total113100.00%4100.00%


static inline void fl_link(struct ipv6_pinfo *np, struct ipv6_fl_socklist *sfl, struct ip6_flowlabel *fl) { spin_lock_bh(&ip6_sk_fl_lock); sfl->fl = fl; sfl->next = np->ipv6_fl_list; rcu_assign_pointer(np->ipv6_fl_list, sfl); spin_unlock_bh(&ip6_sk_fl_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov5189.47%150.00%
Hideaki Yoshifuji / 吉藤英明610.53%150.00%
Total57100.00%2100.00%


int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, int flags) { struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_fl_socklist *sfl; if (flags & IPV6_FL_F_REMOTE) { freq->flr_label = np->rcv_flowinfo & IPV6_FLOWLABEL_MASK; return 0; } if (np->repflow) { freq->flr_label = np->flow_label; return 0; } rcu_read_lock_bh(); for_each_sk_fl_rcu(np, sfl) { if (sfl->fl->label == (np->flow_label & IPV6_FLOWLABEL_MASK)) { spin_lock_bh(&ip6_fl_lock); freq->flr_label = sfl->fl->label; freq->flr_dst = sfl->fl->dst; freq->flr_share = sfl->fl->share; freq->flr_expires = (sfl->fl->expires - jiffies) / HZ; freq->flr_linger = sfl->fl->linger / HZ; spin_unlock_bh(&ip6_fl_lock); rcu_read_unlock_bh(); return 0; } } rcu_read_unlock_bh(); return -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Florent Fourcot185100.00%3100.00%
Total185100.00%3100.00%


int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen) { int uninitialized_var(err); struct net *net = sock_net(sk); struct ipv6_pinfo *np = inet6_sk(sk); struct in6_flowlabel_req freq; struct ipv6_fl_socklist *sfl1 = NULL; struct ipv6_fl_socklist *sfl; struct ipv6_fl_socklist __rcu **sflp; struct ip6_flowlabel *fl, *fl1 = NULL; if (optlen < sizeof(freq)) return -EINVAL; if (copy_from_user(&freq, optval, sizeof(freq))) return -EFAULT; switch (freq.flr_action) { case IPV6_FL_A_PUT: if (freq.flr_flags & IPV6_FL_F_REFLECT) { if (sk->sk_protocol != IPPROTO_TCP) return -ENOPROTOOPT; if (!np->repflow) return -ESRCH; np->flow_label = 0; np->repflow = 0; return 0; } spin_lock_bh(&ip6_sk_fl_lock); for (sflp = &np->ipv6_fl_list; (sfl = rcu_dereference_protected(*sflp, lockdep_is_held(&ip6_sk_fl_lock))) != NULL; sflp = &sfl->next) { if (sfl->fl->label == freq.flr_label) { if (freq.flr_label == (np->flow_label&IPV6_FLOWLABEL_MASK)) np->flow_label &= ~IPV6_FLOWLABEL_MASK; *sflp = sfl->next; spin_unlock_bh(&ip6_sk_fl_lock); fl_release(sfl->fl); kfree_rcu(sfl, rcu); return 0; } } spin_unlock_bh(&ip6_sk_fl_lock); return -ESRCH; case IPV6_FL_A_RENEW: rcu_read_lock_bh(); for_each_sk_fl_rcu(np, sfl) { if (sfl->fl->label == freq.flr_label) { err = fl6_renew(sfl->fl, freq.flr_linger, freq.flr_expires); rcu_read_unlock_bh(); return err; } } rcu_read_unlock_bh(); if (freq.flr_share == IPV6_FL_S_NONE && ns_capable(net->user_ns, CAP_NET_ADMIN)) { fl = fl_lookup(net, freq.flr_label); if (fl) { err = fl6_renew(fl, freq.flr_linger, freq.flr_expires); fl_release(fl); return err; } } return -ESRCH; case IPV6_FL_A_GET: if (freq.flr_flags & IPV6_FL_F_REFLECT) { struct net *net = sock_net(sk); if (net->ipv6.sysctl.flowlabel_consistency) { net_info_ratelimited("Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable\n"); return -EPERM; } if (sk->sk_protocol != IPPROTO_TCP) return -ENOPROTOOPT; np->repflow = 1; return 0; } if (freq.flr_label & ~IPV6_FLOWLABEL_MASK) return -EINVAL; if (net->ipv6.sysctl.flowlabel_state_ranges && (freq.flr_label & IPV6_FLOWLABEL_STATELESS_FLAG)) return -ERANGE; fl = fl_create(net, sk, &freq, optval, optlen, &err); if (!fl) return err; sfl1 = kmalloc(sizeof(*sfl1), GFP_KERNEL); if (freq.flr_label) { err = -EEXIST; rcu_read_lock_bh(); for_each_sk_fl_rcu(np, sfl) { if (sfl->fl->label == freq.flr_label) { if (freq.flr_flags&IPV6_FL_F_EXCL) { rcu_read_unlock_bh(); goto done; } fl1 = sfl->fl; atomic_inc(&fl1->users); break; } } rcu_read_unlock_bh(); if (!fl1) fl1 = fl_lookup(net, freq.flr_label); if (fl1) { recheck: err = -EEXIST; if (freq.flr_flags&IPV6_FL_F_EXCL) goto release; err = -EPERM; if (fl1->share == IPV6_FL_S_EXCL || fl1->share != fl->share || ((fl1->share == IPV6_FL_S_PROCESS) && (fl1->owner.pid == fl->owner.pid)) || ((fl1->share == IPV6_FL_S_USER) && uid_eq(fl1->owner.uid, fl->owner.uid))) goto release; err = -ENOMEM; if (!sfl1) goto release; if (fl->linger > fl1->linger) fl1->linger = fl->linger; if ((long)(fl->expires - fl1->expires) > 0) fl1->expires = fl->expires; fl_link(np, sfl1, fl1); fl_free(fl); return 0; release: fl_release(fl1); goto done; } } err = -ENOENT; if (!(freq.flr_flags&IPV6_FL_F_CREATE)) goto done; err = -ENOMEM; if (!sfl1) goto done; err = mem_check(sk); if (err != 0) goto done; fl1 = fl_intern(net, fl, freq.flr_label); if (fl1) goto recheck; if (!freq.flr_label) { if (copy_to_user(&((struct in6_flowlabel_req __user *) optval)->flr_label, &fl->label, sizeof(fl->label))) { /* Intentionally ignore fault. */ } } fl_link(np, sfl1, fl); return 0; default: return -EINVAL; } done: fl_free(fl); kfree(sfl1); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)65769.01%313.04%
Florent Fourcot11011.55%28.70%
Eric W. Biedermann474.94%28.70%
Hideaki Yoshifuji / 吉藤英明373.89%28.70%
Tom Herbert222.31%14.35%
Pavel Emelyanov202.10%28.70%
Benjamin Thery181.89%14.35%
Ian Morris121.26%28.70%
David S. Miller111.16%28.70%
Eric Dumazet111.16%28.70%
Ingo Molnar30.32%14.35%
Maciej Żenczykowski20.21%14.35%
Al Viro10.11%14.35%
Yan Zheng10.11%14.35%
Total952100.00%23100.00%

#ifdef CONFIG_PROC_FS struct ip6fl_iter_state { struct seq_net_private p; struct pid_namespace *pid_ns; int bucket; }; #define ip6fl_seq_private(seq) ((struct ip6fl_iter_state *)(seq)->private)
static struct ip6_flowlabel *ip6fl_get_first(struct seq_file *seq) { struct ip6_flowlabel *fl = NULL; struct ip6fl_iter_state *state = ip6fl_seq_private(seq); struct net *net = seq_file_net(seq); for (state->bucket = 0; state->bucket <= FL_HASH_MASK; ++state->bucket) { for_each_fl_rcu(state->bucket, fl) { if (net_eq(fl->fl_net, net)) goto out; } } fl = NULL; out: return fl; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4852.17%233.33%
Linus Torvalds (pre-git)2527.17%233.33%
Benjamin Thery1516.30%116.67%
Octavian Purdila44.35%116.67%
Total92100.00%6100.00%


static struct ip6_flowlabel *ip6fl_get_next(struct seq_file *seq, struct ip6_flowlabel *fl) { struct ip6fl_iter_state *state = ip6fl_seq_private(seq); struct net *net = seq_file_net(seq); for_each_fl_continue_rcu(fl) { if (net_eq(fl->fl_net, net)) goto out; } try_again: if (++state->bucket <= FL_HASH_MASK) { for_each_fl_rcu(state->bucket, fl) { if (net_eq(fl->fl_net, net)) goto out; } goto try_again; } fl = NULL; out: return fl; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7773.33%240.00%
Benjamin Thery2019.05%120.00%
Linus Torvalds (pre-git)43.81%120.00%
Octavian Purdila43.81%120.00%
Total105100.00%5100.00%


static struct ip6_flowlabel *ip6fl_get_idx(struct seq_file *seq, loff_t pos) { struct ip6_flowlabel *fl = ip6fl_get_first(seq); if (fl) while (pos && (fl = ip6fl_get_next(seq, fl)) != NULL) --pos; return pos ? NULL : fl; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4578.95%150.00%
Linus Torvalds (pre-git)1221.05%150.00%
Total57100.00%2100.00%


static void *ip6fl_seq_start(struct seq_file *seq, loff_t *pos) __acquires(RCU) { rcu_read_lock_bh(); return *pos ? ip6fl_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3384.62%350.00%
Eric Dumazet37.69%116.67%
Linus Torvalds (pre-git)25.13%116.67%
Joe Perches12.56%116.67%
Total39100.00%6100.00%


static void *ip6fl_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct ip6_flowlabel *fl; if (v == SEQ_START_TOKEN) fl = ip6fl_get_first(seq); else fl = ip6fl_get_next(seq, v); ++*pos; return fl; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4581.82%133.33%
Linus Torvalds (pre-git)916.36%133.33%
Joe Perches11.82%133.33%
Total55100.00%3100.00%


static void ip6fl_seq_stop(struct seq_file *seq, void *v) __releases(RCU) { rcu_read_unlock_bh(); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明1881.82%250.00%
Eric Dumazet313.64%125.00%
Linus Torvalds (pre-git)14.55%125.00%
Total22100.00%4100.00%


static int ip6fl_seq_show(struct seq_file *seq, void *v) { struct ip6fl_iter_state *state = ip6fl_seq_private(seq); if (v == SEQ_START_TOKEN) { seq_puts(seq, "Label S Owner Users Linger Expires Dst Opt\n"); } else { struct ip6_flowlabel *fl = v; seq_printf(seq, "%05X %-1d %-6d %-6d %-6ld %-8ld %pi6 %-4d\n", (unsigned int)ntohl(fl->label), fl->share, ((fl->share == IPV6_FL_S_PROCESS) ? pid_nr_ns(fl->owner.pid, state->pid_ns) : ((fl->share == IPV6_FL_S_USER) ? from_kuid_munged(seq_user_ns(seq), fl->owner.uid) : 0)), atomic_read(&fl->users), fl->linger/HZ, (long)(fl->expires - jiffies)/HZ, &fl->dst, fl->opt ? fl->opt->opt_nflen : 0); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7947.02%111.11%
Eric W. Biedermann5331.55%111.11%
James Morris2112.50%111.11%
Linus Torvalds (pre-git)84.76%111.11%
Joe Perches21.19%111.11%
Florent Fourcot21.19%111.11%
Harvey Harrison21.19%222.22%
Eric Dumazet10.60%111.11%
Total168100.00%9100.00%

static const struct seq_operations ip6fl_seq_ops = { .start = ip6fl_seq_start, .next = ip6fl_seq_next, .stop = ip6fl_seq_stop, .show = ip6fl_seq_show, };
static int ip6fl_seq_open(struct inode *inode, struct file *file) { struct seq_file *seq; struct ip6fl_iter_state *state; int err; err = seq_open_net(inode, file, &ip6fl_seq_ops, sizeof(struct ip6fl_iter_state)); if (!err) { seq = file->private_data; state = ip6fl_seq_private(seq); rcu_read_lock(); state->pid_ns = get_pid_ns(task_active_pid_ns(current)); rcu_read_unlock(); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann5865.91%120.00%
Hideaki Yoshifuji / 吉藤英明2225.00%240.00%
Pavel Emelyanov55.68%120.00%
Benjamin Thery33.41%120.00%
Total88100.00%5100.00%


static int ip6fl_seq_release(struct inode *inode, struct file *file) { struct seq_file *seq = file->private_data; struct ip6fl_iter_state *state = ip6fl_seq_private(seq); put_pid_ns(state->pid_ns); return seq_release_net(inode, file); }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann4896.00%133.33%
Hideaki Yoshifuji / 吉藤英明12.00%133.33%
Pavel Emelyanov12.00%133.33%
Total50100.00%3100.00%

static const struct file_operations ip6fl_seq_fops = { .owner = THIS_MODULE, .open = ip6fl_seq_open, .read = seq_read, .llseek = seq_lseek, .release = ip6fl_seq_release, };
static int __net_init ip6_flowlabel_proc_init(struct net *net) { if (!proc_create("ip6_flowlabel", S_IRUGO, net->proc_net, &ip6fl_seq_fops)) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano1952.78%112.50%
Gao Feng513.89%112.50%
Hideaki Yoshifuji / 吉藤英明513.89%225.00%
Linus Torvalds (pre-git)411.11%225.00%
Al Viro25.56%112.50%
Alexey Dobriyan12.78%112.50%
Total36100.00%8100.00%


static void __net_exit ip6_flowlabel_proc_fini(struct net *net) { remove_proc_entry("ip6_flowlabel", net->proc_net); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano1466.67%125.00%
Gao Feng523.81%125.00%
Alexey Dobriyan14.76%125.00%
Hideaki Yoshifuji / 吉藤英明14.76%125.00%
Total21100.00%4100.00%

#else
static inline int ip6_flowlabel_proc_init(struct net *net) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano15100.00%1100.00%
Total15100.00%1100.00%


static inline void ip6_flowlabel_proc_fini(struct net *net) { }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano1090.91%150.00%
Alexey Dobriyan19.09%150.00%
Total11100.00%2100.00%

#endif
static void __net_exit ip6_flowlabel_net_exit(struct net *net) { ip6_fl_purge(net); ip6_flowlabel_proc_fini(net); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Thery2195.45%266.67%
Alexey Dobriyan14.55%133.33%
Total22100.00%3100.00%

static struct pernet_operations ip6_flowlabel_net_ops = { .init = ip6_flowlabel_proc_init, .exit = ip6_flowlabel_net_exit, };
int ip6_flowlabel_init(void) { return register_pernet_subsys(&ip6_flowlabel_net_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano750.00%125.00%
Benjamin Thery642.86%250.00%
Linus Torvalds (pre-git)17.14%125.00%
Total14100.00%4100.00%


void ip6_flowlabel_cleanup(void) { del_timer(&ip6_fl_gc_timer); unregister_pernet_subsys(&ip6_flowlabel_net_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1052.63%133.33%
Benjamin Thery631.58%133.33%
Al Viro315.79%133.33%
Total19100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)223852.49%44.71%
Hideaki Yoshifuji / 吉藤英明64515.13%1011.76%
Florent Fourcot3107.27%78.24%
Benjamin Thery2746.43%22.35%
Eric W. Biedermann2415.65%33.53%
Pavel Emelyanov1252.93%55.88%
David S. Miller781.83%55.88%
Daniel Lezcano671.57%11.18%
Vinay K. Nallamothu420.98%11.18%
Eric Dumazet340.80%55.88%
James Morris280.66%22.35%
Tom Herbert220.52%11.18%
Ian Morris160.38%22.35%
Octavian Purdila160.38%11.18%
Wei Wang120.28%11.18%
Gao Feng100.23%22.35%
Al Viro100.23%33.53%
Maciej Żenczykowski90.21%11.18%
Dan Carpenter80.19%11.18%
Kees Cook80.19%11.18%
Ingo Molnar70.16%22.35%
Soheil Hassas Yeganeh70.16%11.18%
Thomas Gleixner60.14%11.18%
Hannes Frederic Sowa60.14%11.18%
Alexey Dobriyan60.14%22.35%
Arnaldo Carvalho de Melo50.12%11.18%
Chris Elston50.12%11.18%
Joe Perches40.09%22.35%
Randy Dunlap30.07%11.18%
Tejun Heo30.07%11.18%
Paul Gortmaker30.07%11.18%
Américo Wang20.05%11.18%
Jan Stancek20.05%11.18%
Harvey Harrison20.05%22.35%
David Howells20.05%11.18%
Philippe De Muyter10.02%11.18%
Yan Zheng10.02%11.18%
Linus Torvalds10.02%11.18%
Arjan van de Ven10.02%11.18%
Aruna-Hewapathirane10.02%11.18%
Brian Haley10.02%11.18%
Ingo Oeser10.02%11.18%
Tom Parkin10.02%11.18%
Total4264100.00%85100.00%
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