/* * net/sched/cls_cgroup.c Control Group Classifier * * 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: Thomas Graf */ #include #include #include #include #include #include #include #include struct cls_cgroup_head { u32 handle; struct tcf_exts exts; struct tcf_ematch_tree ematches; struct tcf_proto *tp; struct rcu_head rcu; }; static int cls_cgroup_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) { struct cls_cgroup_head *head = rcu_dereference_bh(tp->root); u32 classid = task_get_classid(skb); if (!classid) return -1; if (!tcf_em_tree_match(skb, &head->ematches, NULL)) return -1; res->classid = classid; res->class = 0; return tcf_exts_exec(skb, &head->exts, res); } static unsigned long cls_cgroup_get(struct tcf_proto *tp, u32 handle) { return 0UL; } static int cls_cgroup_init(struct tcf_proto *tp) { return 0; } static const struct nla_policy cgroup_policy[TCA_CGROUP_MAX + 1] = { [TCA_CGROUP_EMATCHES] = { .type = NLA_NESTED }, }; static void cls_cgroup_destroy_rcu(struct rcu_head *root) { struct cls_cgroup_head *head = container_of(root, struct cls_cgroup_head, rcu); tcf_exts_destroy(&head->exts); tcf_em_tree_destroy(&head->ematches); kfree(head); } static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, struct nlattr **tca, unsigned long *arg, bool ovr) { struct nlattr *tb[TCA_CGROUP_MAX + 1]; struct cls_cgroup_head *head = rtnl_dereference(tp->root); struct cls_cgroup_head *new; struct tcf_ematch_tree t; struct tcf_exts e; int err; if (!tca[TCA_OPTIONS]) return -EINVAL; if (!head && !handle) return -EINVAL; if (head && handle != head->handle) return -ENOENT; new = kzalloc(sizeof(*head), GFP_KERNEL); if (!new) return -ENOBUFS; err = tcf_exts_init(&new->exts, TCA_CGROUP_ACT, TCA_CGROUP_POLICE); if (err < 0) goto errout; new->handle = handle; new->tp = tp; err = nla_parse_nested(tb, TCA_CGROUP_MAX, tca[TCA_OPTIONS], cgroup_policy); if (err < 0) goto errout; err = tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE); if (err < 0) goto errout; err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr); if (err < 0) { tcf_exts_destroy(&e); goto errout; } err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &t); if (err < 0) { tcf_exts_destroy(&e); goto errout; } tcf_exts_change(tp, &new->exts, &e); tcf_em_tree_change(tp, &new->ematches, &t); rcu_assign_pointer(tp->root, new); if (head) call_rcu(&head->rcu, cls_cgroup_destroy_rcu); return 0; errout: tcf_exts_destroy(&new->exts); kfree(new); return err; } static bool cls_cgroup_destroy(struct tcf_proto *tp, bool force) { struct cls_cgroup_head *head = rtnl_dereference(tp->root); if (!force) return false; /* Head can still be NULL due to cls_cgroup_init(). */ if (head) call_rcu(&head->rcu, cls_cgroup_destroy_rcu); return true; } static int cls_cgroup_delete(struct tcf_proto *tp, unsigned long arg) { return -EOPNOTSUPP; } static void cls_cgroup_walk(struct tcf_proto *tp, struct tcf_walker *arg) { struct cls_cgroup_head *head = rtnl_dereference(tp->root); if (arg->count < arg->skip) goto skip; if (arg->fn(tp, (unsigned long) head, arg) < 0) { arg->stop = 1; return; } skip: arg->count++; } static int cls_cgroup_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, struct sk_buff *skb, struct tcmsg *t) { struct cls_cgroup_head *head = rtnl_dereference(tp->root); struct nlattr *nest; t->tcm_handle = head->handle; nest = nla_nest_start(skb, TCA_OPTIONS); if (nest == NULL) goto nla_put_failure; if (tcf_exts_dump(skb, &head->exts) < 0 || tcf_em_tree_dump(skb, &head->ematches, TCA_CGROUP_EMATCHES) < 0) goto nla_put_failure; nla_nest_end(skb, nest); if (tcf_exts_dump_stats(skb, &head->exts) < 0) goto nla_put_failure; return skb->len; nla_put_failure: nla_nest_cancel(skb, nest); return -1; } static struct tcf_proto_ops cls_cgroup_ops __read_mostly = { .kind = "cgroup", .init = cls_cgroup_init, .change = cls_cgroup_change, .classify = cls_cgroup_classify, .destroy = cls_cgroup_destroy, .get = cls_cgroup_get, .delete = cls_cgroup_delete, .walk = cls_cgroup_walk, .dump = cls_cgroup_dump, .owner = THIS_MODULE, }; static int __init init_cgroup_cls(void) { return register_tcf_proto_ops(&cls_cgroup_ops); } static void __exit exit_cgroup_cls(void) { unregister_tcf_proto_ops(&cls_cgroup_ops); } module_init(init_cgroup_cls); module_exit(exit_cgroup_cls); MODULE_LICENSE("GPL"); t'>2017-02-01 11:52:27 -0800 committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-01 11:52:27 -0800 commit6d04dfc8966019b8b0977b2cb942351f13d2b178 (patch) tree2d4f239c1daff620704b77a992c1e70ce1ce6b08 /drivers/usb/storage parent2883aaea363f7a897ff06d2e6c73ae7aae285bcb (diff)parent06425c308b92eaf60767bc71d359f4cbc7a561f8 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller: 1) Fix handling of interrupt status in stmmac driver. Just because we have masked the event from generating interrupts, doesn't mean the bit won't still be set in the interrupt status register. From Alexey Brodkin. 2) Fix DMA API debugging splats in gianfar driver, from Arseny Solokha. 3) Fix off-by-one error in __ip6_append_data(), from Vlad Yasevich. 4) cls_flow does not match on icmpv6 codes properly, from Simon Horman. 5) Initial MAC address can be set incorrectly in some scenerios, from Ivan Vecera. 6) Packet header pointer arithmetic fix in ip6_tnl_parse_tlv_end_lim(), from Dan Carpenter. 7) Fix divide by zero in __tcp_select_window(), from Eric Dumazet. 8) Fix crash in iwlwifi when unregistering thermal zone, from Jens Axboe. 9) Check for DMA mapping errors in starfire driver, from Alexey Khoroshilov. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (31 commits) tcp: fix 0 divide in __tcp_select_window() ipv6: pointer math error in ip6_tnl_parse_tlv_enc_lim() net: fix ndo_features_check/ndo_fix_features comment ordering net/sched: matchall: Fix configuration race be2net: fix initial MAC setting ipv6: fix flow labels when the traffic class is non-0 net: thunderx: avoid dereferencing xcv when NULL net/sched: cls_flower: Correct matching on ICMPv6 code ipv6: Paritially checksum full MTU frames net/mlx4_core: Avoid command timeouts during VF driver device shutdown gianfar: synchronize DMA API usage by free_skb_rx_queue w/ gfar_new_page net: ethtool: add support for 2500BaseT and 5000BaseT link modes can: bcm: fix hrtimer/tasklet termination in bcm op removal net: adaptec: starfire: add checks for dma mapping errors net: phy: micrel: KSZ8795 do not set SUPPORTED_[Asym_]Pause can: Fix kernel panic at security_sock_rcv_skb net: macb: Fix 64 bit addressing support for GEM stmmac: Discard masked flags in interrupt status register net/mlx5e: Check ets capability before ets query FW command net/mlx5e: Fix update of hash function/key via ethtool ...
Diffstat (limited to 'drivers/usb/storage')