--- /dev/null
+From fb38306ceb9e770adfb5ffa6e3c64047b55f7a07 Mon Sep 17 00:00:00 2001
+From: Jamal Hadi Salim <jhs@mojatatu.com>
+Date: Tue, 14 Feb 2023 08:49:12 -0500
+Subject: net/sched: Retire ATM qdisc
+
+From: Jamal Hadi Salim <jhs@mojatatu.com>
+
+commit fb38306ceb9e770adfb5ffa6e3c64047b55f7a07 upstream.
+
+The ATM qdisc has served us well over the years but has not been getting much
+TLC due to lack of known users. Most recently it has become a shooting target
+for syzkaller. For this reason, we are retiring it.
+
+Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
+Acked-by: Jiri Pirko <jiri@nvidia.com>
+Signed-off-by: Paolo Abeni <pabeni@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/sched/Kconfig | 14 -
+ net/sched/Makefile | 1
+ net/sched/sch_atm.c | 710 ----------------------------------------------------
+ 3 files changed, 725 deletions(-)
+ delete mode 100644 net/sched/sch_atm.c
+ delete mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/atm.json
+
+--- a/net/sched/Kconfig
++++ b/net/sched/Kconfig
+@@ -68,20 +68,6 @@ config NET_SCH_HFSC
+ To compile this code as a module, choose M here: the
+ module will be called sch_hfsc.
+
+-config NET_SCH_ATM
+- tristate "ATM Virtual Circuits (ATM)"
+- depends on ATM
+- help
+- Say Y here if you want to use the ATM pseudo-scheduler. This
+- provides a framework for invoking classifiers, which in turn
+- select classes of this queuing discipline. Each class maps
+- the flow(s) it is handling to a given virtual circuit.
+-
+- See the top of <file:net/sched/sch_atm.c> for more details.
+-
+- To compile this code as a module, choose M here: the
+- module will be called sch_atm.
+-
+ config NET_SCH_PRIO
+ tristate "Multi Band Priority Queueing (PRIO)"
+ help
+--- a/net/sched/Makefile
++++ b/net/sched/Makefile
+@@ -45,7 +45,6 @@ obj-$(CONFIG_NET_SCH_TBF) += sch_tbf.o
+ obj-$(CONFIG_NET_SCH_TEQL) += sch_teql.o
+ obj-$(CONFIG_NET_SCH_PRIO) += sch_prio.o
+ obj-$(CONFIG_NET_SCH_MULTIQ) += sch_multiq.o
+-obj-$(CONFIG_NET_SCH_ATM) += sch_atm.o
+ obj-$(CONFIG_NET_SCH_NETEM) += sch_netem.o
+ obj-$(CONFIG_NET_SCH_DRR) += sch_drr.o
+ obj-$(CONFIG_NET_SCH_PLUG) += sch_plug.o
+--- a/net/sched/sch_atm.c
++++ /dev/null
+@@ -1,710 +0,0 @@
+-// SPDX-License-Identifier: GPL-2.0-only
+-/* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */
+-
+-/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
+-
+-#include <linux/module.h>
+-#include <linux/slab.h>
+-#include <linux/init.h>
+-#include <linux/interrupt.h>
+-#include <linux/string.h>
+-#include <linux/errno.h>
+-#include <linux/skbuff.h>
+-#include <linux/atmdev.h>
+-#include <linux/atmclip.h>
+-#include <linux/rtnetlink.h>
+-#include <linux/file.h> /* for fput */
+-#include <net/netlink.h>
+-#include <net/pkt_sched.h>
+-#include <net/pkt_cls.h>
+-
+-/*
+- * The ATM queuing discipline provides a framework for invoking classifiers
+- * (aka "filters"), which in turn select classes of this queuing discipline.
+- * Each class maps the flow(s) it is handling to a given VC. Multiple classes
+- * may share the same VC.
+- *
+- * When creating a class, VCs are specified by passing the number of the open
+- * socket descriptor by which the calling process references the VC. The kernel
+- * keeps the VC open at least until all classes using it are removed.
+- *
+- * In this file, most functions are named atm_tc_* to avoid confusion with all
+- * the atm_* in net/atm. This naming convention differs from what's used in the
+- * rest of net/sched.
+- *
+- * Known bugs:
+- * - sometimes messes up the IP stack
+- * - any manipulations besides the few operations described in the README, are
+- * untested and likely to crash the system
+- * - should lock the flow while there is data in the queue (?)
+- */
+-
+-#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))
+-
+-struct atm_flow_data {
+- struct Qdisc_class_common common;
+- struct Qdisc *q; /* FIFO, TBF, etc. */
+- struct tcf_proto __rcu *filter_list;
+- struct tcf_block *block;
+- struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */
+- void (*old_pop)(struct atm_vcc *vcc,
+- struct sk_buff *skb); /* chaining */
+- struct atm_qdisc_data *parent; /* parent qdisc */
+- struct socket *sock; /* for closing */
+- int ref; /* reference count */
+- struct gnet_stats_basic_packed bstats;
+- struct gnet_stats_queue qstats;
+- struct list_head list;
+- struct atm_flow_data *excess; /* flow for excess traffic;
+- NULL to set CLP instead */
+- int hdr_len;
+- unsigned char hdr[]; /* header data; MUST BE LAST */
+-};
+-
+-struct atm_qdisc_data {
+- struct atm_flow_data link; /* unclassified skbs go here */
+- struct list_head flows; /* NB: "link" is also on this
+- list */
+- struct tasklet_struct task; /* dequeue tasklet */
+-};
+-
+-/* ------------------------- Class/flow operations ------------------------- */
+-
+-static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+-
+- list_for_each_entry(flow, &p->flows, list) {
+- if (flow->common.classid == classid)
+- return flow;
+- }
+- return NULL;
+-}
+-
+-static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
+- struct Qdisc *new, struct Qdisc **old,
+- struct netlink_ext_ack *extack)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)arg;
+-
+- pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
+- sch, p, flow, new, old);
+- if (list_empty(&flow->list))
+- return -EINVAL;
+- if (!new)
+- new = &noop_qdisc;
+- *old = flow->q;
+- flow->q = new;
+- if (*old)
+- qdisc_reset(*old);
+- return 0;
+-}
+-
+-static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl)
+-{
+- struct atm_flow_data *flow = (struct atm_flow_data *)cl;
+-
+- pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow);
+- return flow ? flow->q : NULL;
+-}
+-
+-static unsigned long atm_tc_find(struct Qdisc *sch, u32 classid)
+-{
+- struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+-
+- pr_debug("%s(sch %p,[qdisc %p],classid %x)\n", __func__, sch, p, classid);
+- flow = lookup_flow(sch, classid);
+- pr_debug("%s: flow %p\n", __func__, flow);
+- return (unsigned long)flow;
+-}
+-
+-static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
+- unsigned long parent, u32 classid)
+-{
+- struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+-
+- pr_debug("%s(sch %p,[qdisc %p],classid %x)\n", __func__, sch, p, classid);
+- flow = lookup_flow(sch, classid);
+- if (flow)
+- flow->ref++;
+- pr_debug("%s: flow %p\n", __func__, flow);
+- return (unsigned long)flow;
+-}
+-
+-/*
+- * atm_tc_put handles all destructions, including the ones that are explicitly
+- * requested (atm_tc_destroy, etc.). The assumption here is that we never drop
+- * anything that still seems to be in use.
+- */
+-static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)cl;
+-
+- pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
+- if (--flow->ref)
+- return;
+- pr_debug("atm_tc_put: destroying\n");
+- list_del_init(&flow->list);
+- pr_debug("atm_tc_put: qdisc %p\n", flow->q);
+- qdisc_put(flow->q);
+- tcf_block_put(flow->block);
+- if (flow->sock) {
+- pr_debug("atm_tc_put: f_count %ld\n",
+- file_count(flow->sock->file));
+- flow->vcc->pop = flow->old_pop;
+- sockfd_put(flow->sock);
+- }
+- if (flow->excess)
+- atm_tc_put(sch, (unsigned long)flow->excess);
+- if (flow != &p->link)
+- kfree(flow);
+- /*
+- * If flow == &p->link, the qdisc no longer works at this point and
+- * needs to be removed. (By the caller of atm_tc_put.)
+- */
+-}
+-
+-static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+-{
+- struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
+-
+- pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p);
+- VCC2FLOW(vcc)->old_pop(vcc, skb);
+- tasklet_schedule(&p->task);
+-}
+-
+-static const u8 llc_oui_ip[] = {
+- 0xaa, /* DSAP: non-ISO */
+- 0xaa, /* SSAP: non-ISO */
+- 0x03, /* Ctrl: Unnumbered Information Command PDU */
+- 0x00, /* OUI: EtherType */
+- 0x00, 0x00,
+- 0x08, 0x00
+-}; /* Ethertype IP (0800) */
+-
+-static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = {
+- [TCA_ATM_FD] = { .type = NLA_U32 },
+- [TCA_ATM_EXCESS] = { .type = NLA_U32 },
+-};
+-
+-static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
+- struct nlattr **tca, unsigned long *arg,
+- struct netlink_ext_ack *extack)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
+- struct atm_flow_data *excess = NULL;
+- struct nlattr *opt = tca[TCA_OPTIONS];
+- struct nlattr *tb[TCA_ATM_MAX + 1];
+- struct socket *sock;
+- int fd, error, hdr_len;
+- void *hdr;
+-
+- pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
+- "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
+- /*
+- * The concept of parents doesn't apply for this qdisc.
+- */
+- if (parent && parent != TC_H_ROOT && parent != sch->handle)
+- return -EINVAL;
+- /*
+- * ATM classes cannot be changed. In order to change properties of the
+- * ATM connection, that socket needs to be modified directly (via the
+- * native ATM API. In order to send a flow to a different VC, the old
+- * class needs to be removed and a new one added. (This may be changed
+- * later.)
+- */
+- if (flow)
+- return -EBUSY;
+- if (opt == NULL)
+- return -EINVAL;
+-
+- error = nla_parse_nested_deprecated(tb, TCA_ATM_MAX, opt, atm_policy,
+- NULL);
+- if (error < 0)
+- return error;
+-
+- if (!tb[TCA_ATM_FD])
+- return -EINVAL;
+- fd = nla_get_u32(tb[TCA_ATM_FD]);
+- pr_debug("atm_tc_change: fd %d\n", fd);
+- if (tb[TCA_ATM_HDR]) {
+- hdr_len = nla_len(tb[TCA_ATM_HDR]);
+- hdr = nla_data(tb[TCA_ATM_HDR]);
+- } else {
+- hdr_len = RFC1483LLC_LEN;
+- hdr = NULL; /* default LLC/SNAP for IP */
+- }
+- if (!tb[TCA_ATM_EXCESS])
+- excess = NULL;
+- else {
+- excess = (struct atm_flow_data *)
+- atm_tc_find(sch, nla_get_u32(tb[TCA_ATM_EXCESS]));
+- if (!excess)
+- return -ENOENT;
+- }
+- pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
+- opt->nla_type, nla_len(opt), hdr_len);
+- sock = sockfd_lookup(fd, &error);
+- if (!sock)
+- return error; /* f_count++ */
+- pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
+- if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
+- error = -EPROTOTYPE;
+- goto err_out;
+- }
+- /* @@@ should check if the socket is really operational or we'll crash
+- on vcc->send */
+- if (classid) {
+- if (TC_H_MAJ(classid ^ sch->handle)) {
+- pr_debug("atm_tc_change: classid mismatch\n");
+- error = -EINVAL;
+- goto err_out;
+- }
+- } else {
+- int i;
+- unsigned long cl;
+-
+- for (i = 1; i < 0x8000; i++) {
+- classid = TC_H_MAKE(sch->handle, 0x8000 | i);
+- cl = atm_tc_find(sch, classid);
+- if (!cl)
+- break;
+- }
+- }
+- pr_debug("atm_tc_change: new id %x\n", classid);
+- flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
+- pr_debug("atm_tc_change: flow %p\n", flow);
+- if (!flow) {
+- error = -ENOBUFS;
+- goto err_out;
+- }
+-
+- error = tcf_block_get(&flow->block, &flow->filter_list, sch,
+- extack);
+- if (error) {
+- kfree(flow);
+- goto err_out;
+- }
+-
+- flow->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid,
+- extack);
+- if (!flow->q)
+- flow->q = &noop_qdisc;
+- pr_debug("atm_tc_change: qdisc %p\n", flow->q);
+- flow->sock = sock;
+- flow->vcc = ATM_SD(sock); /* speedup */
+- flow->vcc->user_back = flow;
+- pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
+- flow->old_pop = flow->vcc->pop;
+- flow->parent = p;
+- flow->vcc->pop = sch_atm_pop;
+- flow->common.classid = classid;
+- flow->ref = 1;
+- flow->excess = excess;
+- list_add(&flow->list, &p->link.list);
+- flow->hdr_len = hdr_len;
+- if (hdr)
+- memcpy(flow->hdr, hdr, hdr_len);
+- else
+- memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
+- *arg = (unsigned long)flow;
+- return 0;
+-err_out:
+- sockfd_put(sock);
+- return error;
+-}
+-
+-static int atm_tc_delete(struct Qdisc *sch, unsigned long arg,
+- struct netlink_ext_ack *extack)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)arg;
+-
+- pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
+- if (list_empty(&flow->list))
+- return -EINVAL;
+- if (rcu_access_pointer(flow->filter_list) || flow == &p->link)
+- return -EBUSY;
+- /*
+- * Reference count must be 2: one for "keepalive" (set at class
+- * creation), and one for the reference held when calling delete.
+- */
+- if (flow->ref < 2) {
+- pr_err("atm_tc_delete: flow->ref == %d\n", flow->ref);
+- return -EINVAL;
+- }
+- if (flow->ref > 2)
+- return -EBUSY; /* catch references via excess, etc. */
+- atm_tc_put(sch, arg);
+- return 0;
+-}
+-
+-static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+-
+- pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
+- if (walker->stop)
+- return;
+- list_for_each_entry(flow, &p->flows, list) {
+- if (walker->count >= walker->skip &&
+- walker->fn(sch, (unsigned long)flow, walker) < 0) {
+- walker->stop = 1;
+- break;
+- }
+- walker->count++;
+- }
+-}
+-
+-static struct tcf_block *atm_tc_tcf_block(struct Qdisc *sch, unsigned long cl,
+- struct netlink_ext_ack *extack)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)cl;
+-
+- pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
+- return flow ? flow->block : p->link.block;
+-}
+-
+-/* --------------------------- Qdisc operations ---------------------------- */
+-
+-static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
+- struct sk_buff **to_free)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+- struct tcf_result res;
+- int result;
+- int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
+-
+- pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
+- result = TC_ACT_OK; /* be nice to gcc */
+- flow = NULL;
+- if (TC_H_MAJ(skb->priority) != sch->handle ||
+- !(flow = (struct atm_flow_data *)atm_tc_find(sch, skb->priority))) {
+- struct tcf_proto *fl;
+-
+- list_for_each_entry(flow, &p->flows, list) {
+- fl = rcu_dereference_bh(flow->filter_list);
+- if (fl) {
+- result = tcf_classify(skb, NULL, fl, &res, true);
+- if (result < 0)
+- continue;
+- if (result == TC_ACT_SHOT)
+- goto done;
+-
+- flow = (struct atm_flow_data *)res.class;
+- if (!flow)
+- flow = lookup_flow(sch, res.classid);
+- goto drop;
+- }
+- }
+- flow = NULL;
+-done:
+- ;
+- }
+- if (!flow) {
+- flow = &p->link;
+- } else {
+- if (flow->vcc)
+- ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
+- /*@@@ looks good ... but it's not supposed to work :-) */
+-#ifdef CONFIG_NET_CLS_ACT
+- switch (result) {
+- case TC_ACT_QUEUED:
+- case TC_ACT_STOLEN:
+- case TC_ACT_TRAP:
+- __qdisc_drop(skb, to_free);
+- return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
+- case TC_ACT_SHOT:
+- __qdisc_drop(skb, to_free);
+- goto drop;
+- case TC_ACT_RECLASSIFY:
+- if (flow->excess)
+- flow = flow->excess;
+- else
+- ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
+- break;
+- }
+-#endif
+- }
+-
+- ret = qdisc_enqueue(skb, flow->q, to_free);
+- if (ret != NET_XMIT_SUCCESS) {
+-drop: __maybe_unused
+- if (net_xmit_drop_count(ret)) {
+- qdisc_qstats_drop(sch);
+- if (flow)
+- flow->qstats.drops++;
+- }
+- return ret;
+- }
+- /*
+- * Okay, this may seem weird. We pretend we've dropped the packet if
+- * it goes via ATM. The reason for this is that the outer qdisc
+- * expects to be able to q->dequeue the packet later on if we return
+- * success at this place. Also, sch->q.qdisc needs to reflect whether
+- * there is a packet egligible for dequeuing or not. Note that the
+- * statistics of the outer qdisc are necessarily wrong because of all
+- * this. There's currently no correct solution for this.
+- */
+- if (flow == &p->link) {
+- sch->q.qlen++;
+- return NET_XMIT_SUCCESS;
+- }
+- tasklet_schedule(&p->task);
+- return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
+-}
+-
+-/*
+- * Dequeue packets and send them over ATM. Note that we quite deliberately
+- * avoid checking net_device's flow control here, simply because sch_atm
+- * uses its own channels, which have nothing to do with any CLIP/LANE/or
+- * non-ATM interfaces.
+- */
+-
+-static void sch_atm_dequeue(struct tasklet_struct *t)
+-{
+- struct atm_qdisc_data *p = from_tasklet(p, t, task);
+- struct Qdisc *sch = qdisc_from_priv(p);
+- struct atm_flow_data *flow;
+- struct sk_buff *skb;
+-
+- pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p);
+- list_for_each_entry(flow, &p->flows, list) {
+- if (flow == &p->link)
+- continue;
+- /*
+- * If traffic is properly shaped, this won't generate nasty
+- * little bursts. Otherwise, it may ... (but that's okay)
+- */
+- while ((skb = flow->q->ops->peek(flow->q))) {
+- if (!atm_may_send(flow->vcc, skb->truesize))
+- break;
+-
+- skb = qdisc_dequeue_peeked(flow->q);
+- if (unlikely(!skb))
+- break;
+-
+- qdisc_bstats_update(sch, skb);
+- bstats_update(&flow->bstats, skb);
+- pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
+- /* remove any LL header somebody else has attached */
+- skb_pull(skb, skb_network_offset(skb));
+- if (skb_headroom(skb) < flow->hdr_len) {
+- struct sk_buff *new;
+-
+- new = skb_realloc_headroom(skb, flow->hdr_len);
+- dev_kfree_skb(skb);
+- if (!new)
+- continue;
+- skb = new;
+- }
+- pr_debug("sch_atm_dequeue: ip %p, data %p\n",
+- skb_network_header(skb), skb->data);
+- ATM_SKB(skb)->vcc = flow->vcc;
+- memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
+- flow->hdr_len);
+- refcount_add(skb->truesize,
+- &sk_atm(flow->vcc)->sk_wmem_alloc);
+- /* atm.atm_options are already set by atm_tc_enqueue */
+- flow->vcc->send(flow->vcc, skb);
+- }
+- }
+-}
+-
+-static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct sk_buff *skb;
+-
+- pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
+- tasklet_schedule(&p->task);
+- skb = qdisc_dequeue_peeked(p->link.q);
+- if (skb)
+- sch->q.qlen--;
+- return skb;
+-}
+-
+-static struct sk_buff *atm_tc_peek(struct Qdisc *sch)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+-
+- pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p);
+-
+- return p->link.q->ops->peek(p->link.q);
+-}
+-
+-static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt,
+- struct netlink_ext_ack *extack)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- int err;
+-
+- pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
+- INIT_LIST_HEAD(&p->flows);
+- INIT_LIST_HEAD(&p->link.list);
+- list_add(&p->link.list, &p->flows);
+- p->link.q = qdisc_create_dflt(sch->dev_queue,
+- &pfifo_qdisc_ops, sch->handle, extack);
+- if (!p->link.q)
+- p->link.q = &noop_qdisc;
+- pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
+- p->link.vcc = NULL;
+- p->link.sock = NULL;
+- p->link.common.classid = sch->handle;
+- p->link.ref = 1;
+-
+- err = tcf_block_get(&p->link.block, &p->link.filter_list, sch,
+- extack);
+- if (err)
+- return err;
+-
+- tasklet_setup(&p->task, sch_atm_dequeue);
+- return 0;
+-}
+-
+-static void atm_tc_reset(struct Qdisc *sch)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow;
+-
+- pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
+- list_for_each_entry(flow, &p->flows, list)
+- qdisc_reset(flow->q);
+-}
+-
+-static void atm_tc_destroy(struct Qdisc *sch)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow, *tmp;
+-
+- pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
+- list_for_each_entry(flow, &p->flows, list) {
+- tcf_block_put(flow->block);
+- flow->block = NULL;
+- }
+-
+- list_for_each_entry_safe(flow, tmp, &p->flows, list) {
+- if (flow->ref > 1)
+- pr_err("atm_destroy: %p->ref = %d\n", flow, flow->ref);
+- atm_tc_put(sch, (unsigned long)flow);
+- }
+- tasklet_kill(&p->task);
+-}
+-
+-static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
+- struct sk_buff *skb, struct tcmsg *tcm)
+-{
+- struct atm_qdisc_data *p = qdisc_priv(sch);
+- struct atm_flow_data *flow = (struct atm_flow_data *)cl;
+- struct nlattr *nest;
+-
+- pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
+- sch, p, flow, skb, tcm);
+- if (list_empty(&flow->list))
+- return -EINVAL;
+- tcm->tcm_handle = flow->common.classid;
+- tcm->tcm_info = flow->q->handle;
+-
+- nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
+- if (nest == NULL)
+- goto nla_put_failure;
+-
+- if (nla_put(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr))
+- goto nla_put_failure;
+- if (flow->vcc) {
+- struct sockaddr_atmpvc pvc;
+- int state;
+-
+- memset(&pvc, 0, sizeof(pvc));
+- pvc.sap_family = AF_ATMPVC;
+- pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
+- pvc.sap_addr.vpi = flow->vcc->vpi;
+- pvc.sap_addr.vci = flow->vcc->vci;
+- if (nla_put(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc))
+- goto nla_put_failure;
+- state = ATM_VF2VS(flow->vcc->flags);
+- if (nla_put_u32(skb, TCA_ATM_STATE, state))
+- goto nla_put_failure;
+- }
+- if (flow->excess) {
+- if (nla_put_u32(skb, TCA_ATM_EXCESS, flow->common.classid))
+- goto nla_put_failure;
+- } else {
+- if (nla_put_u32(skb, TCA_ATM_EXCESS, 0))
+- goto nla_put_failure;
+- }
+- return nla_nest_end(skb, nest);
+-
+-nla_put_failure:
+- nla_nest_cancel(skb, nest);
+- return -1;
+-}
+-static int
+-atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg,
+- struct gnet_dump *d)
+-{
+- struct atm_flow_data *flow = (struct atm_flow_data *)arg;
+-
+- if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
+- d, NULL, &flow->bstats) < 0 ||
+- gnet_stats_copy_queue(d, NULL, &flow->qstats, flow->q->q.qlen) < 0)
+- return -1;
+-
+- return 0;
+-}
+-
+-static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
+-{
+- return 0;
+-}
+-
+-static const struct Qdisc_class_ops atm_class_ops = {
+- .graft = atm_tc_graft,
+- .leaf = atm_tc_leaf,
+- .find = atm_tc_find,
+- .change = atm_tc_change,
+- .delete = atm_tc_delete,
+- .walk = atm_tc_walk,
+- .tcf_block = atm_tc_tcf_block,
+- .bind_tcf = atm_tc_bind_filter,
+- .unbind_tcf = atm_tc_put,
+- .dump = atm_tc_dump_class,
+- .dump_stats = atm_tc_dump_class_stats,
+-};
+-
+-static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
+- .cl_ops = &atm_class_ops,
+- .id = "atm",
+- .priv_size = sizeof(struct atm_qdisc_data),
+- .enqueue = atm_tc_enqueue,
+- .dequeue = atm_tc_dequeue,
+- .peek = atm_tc_peek,
+- .init = atm_tc_init,
+- .reset = atm_tc_reset,
+- .destroy = atm_tc_destroy,
+- .dump = atm_tc_dump,
+- .owner = THIS_MODULE,
+-};
+-
+-static int __init atm_init(void)
+-{
+- return register_qdisc(&atm_qdisc_ops);
+-}
+-
+-static void __exit atm_exit(void)
+-{
+- unregister_qdisc(&atm_qdisc_ops);
+-}
+-
+-module_init(atm_init)
+-module_exit(atm_exit)
+-MODULE_LICENSE("GPL");
--- /dev/null
+From bbe77c14ee6185a61ba6d5e435c1cbb489d2a9ed Mon Sep 17 00:00:00 2001
+From: Jamal Hadi Salim <jhs@mojatatu.com>
+Date: Tue, 14 Feb 2023 08:49:13 -0500
+Subject: net/sched: Retire dsmark qdisc
+
+From: Jamal Hadi Salim <jhs@mojatatu.com>
+
+commit bbe77c14ee6185a61ba6d5e435c1cbb489d2a9ed upstream.
+
+The dsmark qdisc has served us well over the years for diffserv but has not
+been getting much attention due to other more popular approaches to do diffserv
+services. Most recently it has become a shooting target for syzkaller. For this
+reason, we are retiring it.
+
+Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
+Acked-by: Jiri Pirko <jiri@nvidia.com>
+Signed-off-by: Paolo Abeni <pabeni@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/sched/Kconfig | 11 -
+ net/sched/Makefile | 1
+ net/sched/sch_dsmark.c | 522 -------------------------------------------------
+ 3 files changed, 534 deletions(-)
+ delete mode 100644 net/sched/sch_dsmark.c
+ delete mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dsmark.json
+
+--- a/net/sched/Kconfig
++++ b/net/sched/Kconfig
+@@ -186,17 +186,6 @@ config NET_SCH_GRED
+ To compile this code as a module, choose M here: the
+ module will be called sch_gred.
+
+-config NET_SCH_DSMARK
+- tristate "Differentiated Services marker (DSMARK)"
+- help
+- Say Y if you want to schedule packets according to the
+- Differentiated Services architecture proposed in RFC 2475.
+- Technical information on this method, with pointers to associated
+- RFCs, is available at <http://www.gta.ufrj.br/diffserv/>.
+-
+- To compile this code as a module, choose M here: the
+- module will be called sch_dsmark.
+-
+ config NET_SCH_NETEM
+ tristate "Network emulator (NETEM)"
+ help
+--- a/net/sched/Makefile
++++ b/net/sched/Makefile
+@@ -38,7 +38,6 @@ obj-$(CONFIG_NET_SCH_HFSC) += sch_hfsc.o
+ obj-$(CONFIG_NET_SCH_RED) += sch_red.o
+ obj-$(CONFIG_NET_SCH_GRED) += sch_gred.o
+ obj-$(CONFIG_NET_SCH_INGRESS) += sch_ingress.o
+-obj-$(CONFIG_NET_SCH_DSMARK) += sch_dsmark.o
+ obj-$(CONFIG_NET_SCH_SFB) += sch_sfb.o
+ obj-$(CONFIG_NET_SCH_SFQ) += sch_sfq.o
+ obj-$(CONFIG_NET_SCH_TBF) += sch_tbf.o
+--- a/net/sched/sch_dsmark.c
++++ /dev/null
+@@ -1,522 +0,0 @@
+-// SPDX-License-Identifier: GPL-2.0-only
+-/* net/sched/sch_dsmark.c - Differentiated Services field marker */
+-
+-/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
+-
+-
+-#include <linux/module.h>
+-#include <linux/init.h>
+-#include <linux/slab.h>
+-#include <linux/types.h>
+-#include <linux/string.h>
+-#include <linux/errno.h>
+-#include <linux/skbuff.h>
+-#include <linux/rtnetlink.h>
+-#include <linux/bitops.h>
+-#include <net/pkt_sched.h>
+-#include <net/pkt_cls.h>
+-#include <net/dsfield.h>
+-#include <net/inet_ecn.h>
+-#include <asm/byteorder.h>
+-
+-/*
+- * classid class marking
+- * ------- ----- -------
+- * n/a 0 n/a
+- * x:0 1 use entry [0]
+- * ... ... ...
+- * x:y y>0 y+1 use entry [y]
+- * ... ... ...
+- * x:indices-1 indices use entry [indices-1]
+- * ... ... ...
+- * x:y y+1 use entry [y & (indices-1)]
+- * ... ... ...
+- * 0xffff 0x10000 use entry [indices-1]
+- */
+-
+-
+-#define NO_DEFAULT_INDEX (1 << 16)
+-
+-struct mask_value {
+- u8 mask;
+- u8 value;
+-};
+-
+-struct dsmark_qdisc_data {
+- struct Qdisc *q;
+- struct tcf_proto __rcu *filter_list;
+- struct tcf_block *block;
+- struct mask_value *mv;
+- u16 indices;
+- u8 set_tc_index;
+- u32 default_index; /* index range is 0...0xffff */
+-#define DSMARK_EMBEDDED_SZ 16
+- struct mask_value embedded[DSMARK_EMBEDDED_SZ];
+-};
+-
+-static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index)
+-{
+- return index <= p->indices && index > 0;
+-}
+-
+-/* ------------------------- Class/flow operations ------------------------- */
+-
+-static int dsmark_graft(struct Qdisc *sch, unsigned long arg,
+- struct Qdisc *new, struct Qdisc **old,
+- struct netlink_ext_ack *extack)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- pr_debug("%s(sch %p,[qdisc %p],new %p,old %p)\n",
+- __func__, sch, p, new, old);
+-
+- if (new == NULL) {
+- new = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops,
+- sch->handle, NULL);
+- if (new == NULL)
+- new = &noop_qdisc;
+- }
+-
+- *old = qdisc_replace(sch, new, &p->q);
+- return 0;
+-}
+-
+-static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- return p->q;
+-}
+-
+-static unsigned long dsmark_find(struct Qdisc *sch, u32 classid)
+-{
+- return TC_H_MIN(classid) + 1;
+-}
+-
+-static unsigned long dsmark_bind_filter(struct Qdisc *sch,
+- unsigned long parent, u32 classid)
+-{
+- pr_debug("%s(sch %p,[qdisc %p],classid %x)\n",
+- __func__, sch, qdisc_priv(sch), classid);
+-
+- return dsmark_find(sch, classid);
+-}
+-
+-static void dsmark_unbind_filter(struct Qdisc *sch, unsigned long cl)
+-{
+-}
+-
+-static const struct nla_policy dsmark_policy[TCA_DSMARK_MAX + 1] = {
+- [TCA_DSMARK_INDICES] = { .type = NLA_U16 },
+- [TCA_DSMARK_DEFAULT_INDEX] = { .type = NLA_U16 },
+- [TCA_DSMARK_SET_TC_INDEX] = { .type = NLA_FLAG },
+- [TCA_DSMARK_MASK] = { .type = NLA_U8 },
+- [TCA_DSMARK_VALUE] = { .type = NLA_U8 },
+-};
+-
+-static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent,
+- struct nlattr **tca, unsigned long *arg,
+- struct netlink_ext_ack *extack)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- struct nlattr *opt = tca[TCA_OPTIONS];
+- struct nlattr *tb[TCA_DSMARK_MAX + 1];
+- int err = -EINVAL;
+-
+- pr_debug("%s(sch %p,[qdisc %p],classid %x,parent %x), arg 0x%lx\n",
+- __func__, sch, p, classid, parent, *arg);
+-
+- if (!dsmark_valid_index(p, *arg)) {
+- err = -ENOENT;
+- goto errout;
+- }
+-
+- if (!opt)
+- goto errout;
+-
+- err = nla_parse_nested_deprecated(tb, TCA_DSMARK_MAX, opt,
+- dsmark_policy, NULL);
+- if (err < 0)
+- goto errout;
+-
+- if (tb[TCA_DSMARK_VALUE])
+- p->mv[*arg - 1].value = nla_get_u8(tb[TCA_DSMARK_VALUE]);
+-
+- if (tb[TCA_DSMARK_MASK])
+- p->mv[*arg - 1].mask = nla_get_u8(tb[TCA_DSMARK_MASK]);
+-
+- err = 0;
+-
+-errout:
+- return err;
+-}
+-
+-static int dsmark_delete(struct Qdisc *sch, unsigned long arg,
+- struct netlink_ext_ack *extack)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- if (!dsmark_valid_index(p, arg))
+- return -EINVAL;
+-
+- p->mv[arg - 1].mask = 0xff;
+- p->mv[arg - 1].value = 0;
+-
+- return 0;
+-}
+-
+-static void dsmark_walk(struct Qdisc *sch, struct qdisc_walker *walker)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- int i;
+-
+- pr_debug("%s(sch %p,[qdisc %p],walker %p)\n",
+- __func__, sch, p, walker);
+-
+- if (walker->stop)
+- return;
+-
+- for (i = 0; i < p->indices; i++) {
+- if (p->mv[i].mask == 0xff && !p->mv[i].value)
+- goto ignore;
+- if (walker->count >= walker->skip) {
+- if (walker->fn(sch, i + 1, walker) < 0) {
+- walker->stop = 1;
+- break;
+- }
+- }
+-ignore:
+- walker->count++;
+- }
+-}
+-
+-static struct tcf_block *dsmark_tcf_block(struct Qdisc *sch, unsigned long cl,
+- struct netlink_ext_ack *extack)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- return p->block;
+-}
+-
+-/* --------------------------- Qdisc operations ---------------------------- */
+-
+-static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch,
+- struct sk_buff **to_free)
+-{
+- unsigned int len = qdisc_pkt_len(skb);
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- int err;
+-
+- pr_debug("%s(skb %p,sch %p,[qdisc %p])\n", __func__, skb, sch, p);
+-
+- if (p->set_tc_index) {
+- int wlen = skb_network_offset(skb);
+-
+- switch (skb_protocol(skb, true)) {
+- case htons(ETH_P_IP):
+- wlen += sizeof(struct iphdr);
+- if (!pskb_may_pull(skb, wlen) ||
+- skb_try_make_writable(skb, wlen))
+- goto drop;
+-
+- skb->tc_index = ipv4_get_dsfield(ip_hdr(skb))
+- & ~INET_ECN_MASK;
+- break;
+-
+- case htons(ETH_P_IPV6):
+- wlen += sizeof(struct ipv6hdr);
+- if (!pskb_may_pull(skb, wlen) ||
+- skb_try_make_writable(skb, wlen))
+- goto drop;
+-
+- skb->tc_index = ipv6_get_dsfield(ipv6_hdr(skb))
+- & ~INET_ECN_MASK;
+- break;
+- default:
+- skb->tc_index = 0;
+- break;
+- }
+- }
+-
+- if (TC_H_MAJ(skb->priority) == sch->handle)
+- skb->tc_index = TC_H_MIN(skb->priority);
+- else {
+- struct tcf_result res;
+- struct tcf_proto *fl = rcu_dereference_bh(p->filter_list);
+- int result = tcf_classify(skb, NULL, fl, &res, false);
+-
+- pr_debug("result %d class 0x%04x\n", result, res.classid);
+-
+- switch (result) {
+-#ifdef CONFIG_NET_CLS_ACT
+- case TC_ACT_QUEUED:
+- case TC_ACT_STOLEN:
+- case TC_ACT_TRAP:
+- __qdisc_drop(skb, to_free);
+- return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
+-
+- case TC_ACT_SHOT:
+- goto drop;
+-#endif
+- case TC_ACT_OK:
+- skb->tc_index = TC_H_MIN(res.classid);
+- break;
+-
+- default:
+- if (p->default_index != NO_DEFAULT_INDEX)
+- skb->tc_index = p->default_index;
+- break;
+- }
+- }
+-
+- err = qdisc_enqueue(skb, p->q, to_free);
+- if (err != NET_XMIT_SUCCESS) {
+- if (net_xmit_drop_count(err))
+- qdisc_qstats_drop(sch);
+- return err;
+- }
+-
+- sch->qstats.backlog += len;
+- sch->q.qlen++;
+-
+- return NET_XMIT_SUCCESS;
+-
+-drop:
+- qdisc_drop(skb, sch, to_free);
+- return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
+-}
+-
+-static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- struct sk_buff *skb;
+- u32 index;
+-
+- pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p);
+-
+- skb = qdisc_dequeue_peeked(p->q);
+- if (skb == NULL)
+- return NULL;
+-
+- qdisc_bstats_update(sch, skb);
+- qdisc_qstats_backlog_dec(sch, skb);
+- sch->q.qlen--;
+-
+- index = skb->tc_index & (p->indices - 1);
+- pr_debug("index %d->%d\n", skb->tc_index, index);
+-
+- switch (skb_protocol(skb, true)) {
+- case htons(ETH_P_IP):
+- ipv4_change_dsfield(ip_hdr(skb), p->mv[index].mask,
+- p->mv[index].value);
+- break;
+- case htons(ETH_P_IPV6):
+- ipv6_change_dsfield(ipv6_hdr(skb), p->mv[index].mask,
+- p->mv[index].value);
+- break;
+- default:
+- /*
+- * Only complain if a change was actually attempted.
+- * This way, we can send non-IP traffic through dsmark
+- * and don't need yet another qdisc as a bypass.
+- */
+- if (p->mv[index].mask != 0xff || p->mv[index].value)
+- pr_warn("%s: unsupported protocol %d\n",
+- __func__, ntohs(skb_protocol(skb, true)));
+- break;
+- }
+-
+- return skb;
+-}
+-
+-static struct sk_buff *dsmark_peek(struct Qdisc *sch)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p);
+-
+- return p->q->ops->peek(p->q);
+-}
+-
+-static int dsmark_init(struct Qdisc *sch, struct nlattr *opt,
+- struct netlink_ext_ack *extack)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- struct nlattr *tb[TCA_DSMARK_MAX + 1];
+- int err = -EINVAL;
+- u32 default_index = NO_DEFAULT_INDEX;
+- u16 indices;
+- int i;
+-
+- pr_debug("%s(sch %p,[qdisc %p],opt %p)\n", __func__, sch, p, opt);
+-
+- if (!opt)
+- goto errout;
+-
+- err = tcf_block_get(&p->block, &p->filter_list, sch, extack);
+- if (err)
+- return err;
+-
+- err = nla_parse_nested_deprecated(tb, TCA_DSMARK_MAX, opt,
+- dsmark_policy, NULL);
+- if (err < 0)
+- goto errout;
+-
+- err = -EINVAL;
+- if (!tb[TCA_DSMARK_INDICES])
+- goto errout;
+- indices = nla_get_u16(tb[TCA_DSMARK_INDICES]);
+-
+- if (hweight32(indices) != 1)
+- goto errout;
+-
+- if (tb[TCA_DSMARK_DEFAULT_INDEX])
+- default_index = nla_get_u16(tb[TCA_DSMARK_DEFAULT_INDEX]);
+-
+- if (indices <= DSMARK_EMBEDDED_SZ)
+- p->mv = p->embedded;
+- else
+- p->mv = kmalloc_array(indices, sizeof(*p->mv), GFP_KERNEL);
+- if (!p->mv) {
+- err = -ENOMEM;
+- goto errout;
+- }
+- for (i = 0; i < indices; i++) {
+- p->mv[i].mask = 0xff;
+- p->mv[i].value = 0;
+- }
+- p->indices = indices;
+- p->default_index = default_index;
+- p->set_tc_index = nla_get_flag(tb[TCA_DSMARK_SET_TC_INDEX]);
+-
+- p->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, sch->handle,
+- NULL);
+- if (p->q == NULL)
+- p->q = &noop_qdisc;
+- else
+- qdisc_hash_add(p->q, true);
+-
+- pr_debug("%s: qdisc %p\n", __func__, p->q);
+-
+- err = 0;
+-errout:
+- return err;
+-}
+-
+-static void dsmark_reset(struct Qdisc *sch)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p);
+- if (p->q)
+- qdisc_reset(p->q);
+-}
+-
+-static void dsmark_destroy(struct Qdisc *sch)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+-
+- pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p);
+-
+- tcf_block_put(p->block);
+- qdisc_put(p->q);
+- if (p->mv != p->embedded)
+- kfree(p->mv);
+-}
+-
+-static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl,
+- struct sk_buff *skb, struct tcmsg *tcm)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- struct nlattr *opts = NULL;
+-
+- pr_debug("%s(sch %p,[qdisc %p],class %ld\n", __func__, sch, p, cl);
+-
+- if (!dsmark_valid_index(p, cl))
+- return -EINVAL;
+-
+- tcm->tcm_handle = TC_H_MAKE(TC_H_MAJ(sch->handle), cl - 1);
+- tcm->tcm_info = p->q->handle;
+-
+- opts = nla_nest_start_noflag(skb, TCA_OPTIONS);
+- if (opts == NULL)
+- goto nla_put_failure;
+- if (nla_put_u8(skb, TCA_DSMARK_MASK, p->mv[cl - 1].mask) ||
+- nla_put_u8(skb, TCA_DSMARK_VALUE, p->mv[cl - 1].value))
+- goto nla_put_failure;
+-
+- return nla_nest_end(skb, opts);
+-
+-nla_put_failure:
+- nla_nest_cancel(skb, opts);
+- return -EMSGSIZE;
+-}
+-
+-static int dsmark_dump(struct Qdisc *sch, struct sk_buff *skb)
+-{
+- struct dsmark_qdisc_data *p = qdisc_priv(sch);
+- struct nlattr *opts = NULL;
+-
+- opts = nla_nest_start_noflag(skb, TCA_OPTIONS);
+- if (opts == NULL)
+- goto nla_put_failure;
+- if (nla_put_u16(skb, TCA_DSMARK_INDICES, p->indices))
+- goto nla_put_failure;
+-
+- if (p->default_index != NO_DEFAULT_INDEX &&
+- nla_put_u16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index))
+- goto nla_put_failure;
+-
+- if (p->set_tc_index &&
+- nla_put_flag(skb, TCA_DSMARK_SET_TC_INDEX))
+- goto nla_put_failure;
+-
+- return nla_nest_end(skb, opts);
+-
+-nla_put_failure:
+- nla_nest_cancel(skb, opts);
+- return -EMSGSIZE;
+-}
+-
+-static const struct Qdisc_class_ops dsmark_class_ops = {
+- .graft = dsmark_graft,
+- .leaf = dsmark_leaf,
+- .find = dsmark_find,
+- .change = dsmark_change,
+- .delete = dsmark_delete,
+- .walk = dsmark_walk,
+- .tcf_block = dsmark_tcf_block,
+- .bind_tcf = dsmark_bind_filter,
+- .unbind_tcf = dsmark_unbind_filter,
+- .dump = dsmark_dump_class,
+-};
+-
+-static struct Qdisc_ops dsmark_qdisc_ops __read_mostly = {
+- .next = NULL,
+- .cl_ops = &dsmark_class_ops,
+- .id = "dsmark",
+- .priv_size = sizeof(struct dsmark_qdisc_data),
+- .enqueue = dsmark_enqueue,
+- .dequeue = dsmark_dequeue,
+- .peek = dsmark_peek,
+- .init = dsmark_init,
+- .reset = dsmark_reset,
+- .destroy = dsmark_destroy,
+- .change = NULL,
+- .dump = dsmark_dump,
+- .owner = THIS_MODULE,
+-};
+-
+-static int __init dsmark_module_init(void)
+-{
+- return register_qdisc(&dsmark_qdisc_ops);
+-}
+-
+-static void __exit dsmark_module_exit(void)
+-{
+- unregister_qdisc(&dsmark_qdisc_ops);
+-}
+-
+-module_init(dsmark_module_init)
+-module_exit(dsmark_module_exit)
+-
+-MODULE_LICENSE("GPL");
projects / thirdparty / kernel / stable-queue.git / commitdiff
