^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * net/sched/sch_api.c Packet scheduler API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Fixes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Rani Assaf <rani@magic.metawire.com> :980802: JIFFIES and CPU clock sources are repaired.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Jamal Hadi Salim <hadi@nortelnetworks.com>: 990601: ingress support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/hrtimer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/hashtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <net/pkt_sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <net/pkt_cls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <trace/events/qdisc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) Short review.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) -------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) This file consists of two interrelated parts:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 1. queueing disciplines manager frontend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 2. traffic classes manager frontend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) Generally, queueing discipline ("qdisc") is a black box,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) which is able to enqueue packets and to dequeue them (when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) device is ready to send something) in order and at times
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) determined by algorithm hidden in it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) qdisc's are divided to two categories:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) - "queues", which have no internal structure visible from outside.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) - "schedulers", which split all the packets to "traffic classes",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) using "packet classifiers" (look at cls_api.c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) In turn, classes may have child qdiscs (as rule, queues)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) attached to them etc. etc. etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) The goal of the routines in this file is to translate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) information supplied by user in the form of handles
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) to more intelligible for kernel form, to make some sanity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) checks and part of work, which is common to all qdiscs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) and to provide rtnetlink notifications.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) All real intelligent work is done inside qdisc modules.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) Every discipline has two major routines: enqueue and dequeue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) ---dequeue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) dequeue usually returns a skb to send. It is allowed to return NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) but it does not mean that queue is empty, it just means that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) discipline does not want to send anything this time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) Queue is really empty if q->q.qlen == 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) For complicated disciplines with multiple queues q->q is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) real packet queue, but however q->q.qlen must be valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ---enqueue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) enqueue returns 0, if packet was enqueued successfully.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) If packet (this one or another one) was dropped, it returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) not zero error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) NET_XMIT_DROP - this packet dropped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) Expected action: do not backoff, but wait until queue will clear.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) NET_XMIT_CN - probably this packet enqueued, but another one dropped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) Expected action: backoff or ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) Auxiliary routines:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ---peek
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) like dequeue but without removing a packet from the queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ---reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) returns qdisc to initial state: purge all buffers, clear all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) timers, counters (except for statistics) etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ---init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) initializes newly created qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ---destroy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) destroys resources allocated by init and during lifetime of qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ---change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) changes qdisc parameters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* Protects list of registered TC modules. It is pure SMP lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static DEFINE_RWLOCK(qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Queueing disciplines manipulation. *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* The list of all installed queueing disciplines. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static struct Qdisc_ops *qdisc_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Register/unregister queueing discipline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) int register_qdisc(struct Qdisc_ops *qops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct Qdisc_ops *q, **qp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int rc = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) write_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!strcmp(qops->id, q->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (qops->enqueue == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) qops->enqueue = noop_qdisc_ops.enqueue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (qops->peek == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (qops->dequeue == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) qops->peek = noop_qdisc_ops.peek;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) goto out_einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (qops->dequeue == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) qops->dequeue = noop_qdisc_ops.dequeue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (qops->cl_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) const struct Qdisc_class_ops *cops = qops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (!(cops->find && cops->walk && cops->leaf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto out_einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (cops->tcf_block && !(cops->bind_tcf && cops->unbind_tcf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) goto out_einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) qops->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) *qp = qops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) write_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) out_einval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) EXPORT_SYMBOL(register_qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) int unregister_qdisc(struct Qdisc_ops *qops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct Qdisc_ops *q, **qp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) write_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (q == qops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (q) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *qp = q->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) q->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) write_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) EXPORT_SYMBOL(unregister_qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Get default qdisc if not otherwise specified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void qdisc_get_default(char *name, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) read_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) strlcpy(name, default_qdisc_ops->id, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) read_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static struct Qdisc_ops *qdisc_lookup_default(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct Qdisc_ops *q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) for (q = qdisc_base; q; q = q->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (!strcmp(name, q->id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (!try_module_get(q->owner))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /* Set new default qdisc to use */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) int qdisc_set_default(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) const struct Qdisc_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!capable(CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) write_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ops = qdisc_lookup_default(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (!ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* Not found, drop lock and try to load module */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) write_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) request_module("sch_%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) write_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ops = qdisc_lookup_default(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* Set new default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) module_put(default_qdisc_ops->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) default_qdisc_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) write_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return ops ? 0 : -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #ifdef CONFIG_NET_SCH_DEFAULT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* Set default value from kernel config */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int __init sch_default_qdisc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return qdisc_set_default(CONFIG_DEFAULT_NET_SCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) late_initcall(sch_default_qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* We know handle. Find qdisc among all qdisc's attached to device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * (root qdisc, all its children, children of children etc.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * Note: caller either uses rtnl or rcu_read_lock()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct Qdisc *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (!qdisc_dev(root))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return (root->handle == handle ? root : NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (!(root->flags & TCQ_F_BUILTIN) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) root->handle == handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) hash_for_each_possible_rcu(qdisc_dev(root)->qdisc_hash, q, hash, handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) lockdep_rtnl_is_held()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (q->handle == handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) void qdisc_hash_add(struct Qdisc *q, bool invisible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) hash_add_rcu(qdisc_dev(q)->qdisc_hash, &q->hash, q->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (invisible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) q->flags |= TCQ_F_INVISIBLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) EXPORT_SYMBOL(qdisc_hash_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) void qdisc_hash_del(struct Qdisc *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) hash_del_rcu(&q->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) EXPORT_SYMBOL(qdisc_hash_del);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct Qdisc *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) q = qdisc_match_from_root(rtnl_dereference(dev->qdisc), handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (dev_ingress_queue(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) q = qdisc_match_from_root(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) dev_ingress_queue(dev)->qdisc_sleeping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) struct netdev_queue *nq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct Qdisc *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (!handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) q = qdisc_match_from_root(rcu_dereference(dev->qdisc), handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) nq = dev_ingress_queue_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (nq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) q = qdisc_match_from_root(nq->qdisc_sleeping, handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) unsigned long cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) const struct Qdisc_class_ops *cops = p->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (cops == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) cl = cops->find(p, classid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (cl == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return cops->leaf(p, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) /* Find queueing discipline by name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static struct Qdisc_ops *qdisc_lookup_ops(struct nlattr *kind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct Qdisc_ops *q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (kind) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) read_lock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) for (q = qdisc_base; q; q = q->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (nla_strcmp(kind, q->id) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (!try_module_get(q->owner))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) read_unlock(&qdisc_mod_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /* The linklayer setting were not transferred from iproute2, in older
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * versions, and the rate tables lookup systems have been dropped in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * the kernel. To keep backward compatible with older iproute2 tc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * utils, we detect the linklayer setting by detecting if the rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * table were modified.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * For linklayer ATM table entries, the rate table will be aligned to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * 48 bytes, thus some table entries will contain the same value. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * mpu (min packet unit) is also encoded into the old rate table, thus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * starting from the mpu, we find low and high table entries for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * mapping this cell. If these entries contain the same value, when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * the rate tables have been modified for linklayer ATM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * This is done by rounding mpu to the nearest 48 bytes cell/entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * and then roundup to the next cell, calc the table entry one below,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * and compare.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static __u8 __detect_linklayer(struct tc_ratespec *r, __u32 *rtab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int low = roundup(r->mpu, 48);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) int high = roundup(low+1, 48);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) int cell_low = low >> r->cell_log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int cell_high = (high >> r->cell_log) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* rtab is too inaccurate at rates > 100Mbit/s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if ((r->rate > (100000000/8)) || (rtab[0] == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) pr_debug("TC linklayer: Giving up ATM detection\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return TC_LINKLAYER_ETHERNET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if ((cell_high > cell_low) && (cell_high < 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) && (rtab[cell_low] == rtab[cell_high])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) pr_debug("TC linklayer: Detected ATM, low(%d)=high(%d)=%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) cell_low, cell_high, rtab[cell_high]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return TC_LINKLAYER_ATM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return TC_LINKLAYER_ETHERNET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static struct qdisc_rate_table *qdisc_rtab_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct nlattr *tab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct qdisc_rate_table *rtab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (tab == NULL || r->rate == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) r->cell_log == 0 || r->cell_log >= 32 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) nla_len(tab) != TC_RTAB_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) NL_SET_ERR_MSG(extack, "Invalid rate table parameters for searching");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) for (rtab = qdisc_rtab_list; rtab; rtab = rtab->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (!memcmp(&rtab->rate, r, sizeof(struct tc_ratespec)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) !memcmp(&rtab->data, nla_data(tab), 1024)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) rtab->refcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return rtab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) rtab = kmalloc(sizeof(*rtab), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (rtab) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) rtab->rate = *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) rtab->refcnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) memcpy(rtab->data, nla_data(tab), 1024);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (r->linklayer == TC_LINKLAYER_UNAWARE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) r->linklayer = __detect_linklayer(r, rtab->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) rtab->next = qdisc_rtab_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) qdisc_rtab_list = rtab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) NL_SET_ERR_MSG(extack, "Failed to allocate new qdisc rate table");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return rtab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) EXPORT_SYMBOL(qdisc_get_rtab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) void qdisc_put_rtab(struct qdisc_rate_table *tab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct qdisc_rate_table *rtab, **rtabp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (!tab || --tab->refcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) for (rtabp = &qdisc_rtab_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) (rtab = *rtabp) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) rtabp = &rtab->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (rtab == tab) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) *rtabp = rtab->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) kfree(rtab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) EXPORT_SYMBOL(qdisc_put_rtab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) static LIST_HEAD(qdisc_stab_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static const struct nla_policy stab_policy[TCA_STAB_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) [TCA_STAB_BASE] = { .len = sizeof(struct tc_sizespec) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) [TCA_STAB_DATA] = { .type = NLA_BINARY },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct nlattr *tb[TCA_STAB_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct qdisc_size_table *stab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct tc_sizespec *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) unsigned int tsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) u16 *tab = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) err = nla_parse_nested_deprecated(tb, TCA_STAB_MAX, opt, stab_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!tb[TCA_STAB_BASE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) NL_SET_ERR_MSG(extack, "Size table base attribute is missing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) s = nla_data(tb[TCA_STAB_BASE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (s->tsize > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (!tb[TCA_STAB_DATA]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) NL_SET_ERR_MSG(extack, "Size table data attribute is missing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) tab = nla_data(tb[TCA_STAB_DATA]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) tsize = nla_len(tb[TCA_STAB_DATA]) / sizeof(u16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (tsize != s->tsize || (!tab && tsize > 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) NL_SET_ERR_MSG(extack, "Invalid size of size table");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) list_for_each_entry(stab, &qdisc_stab_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (memcmp(&stab->szopts, s, sizeof(*s)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (tsize > 0 && memcmp(stab->data, tab, tsize * sizeof(u16)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) stab->refcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) return stab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (s->size_log > STAB_SIZE_LOG_MAX ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) s->cell_log > STAB_SIZE_LOG_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) NL_SET_ERR_MSG(extack, "Invalid logarithmic size of size table");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) stab = kmalloc(sizeof(*stab) + tsize * sizeof(u16), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (!stab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) stab->refcnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) stab->szopts = *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (tsize > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) memcpy(stab->data, tab, tsize * sizeof(u16));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) list_add_tail(&stab->list, &qdisc_stab_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return stab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) void qdisc_put_stab(struct qdisc_size_table *tab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (!tab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (--tab->refcnt == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) list_del(&tab->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) kfree_rcu(tab, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) EXPORT_SYMBOL(qdisc_put_stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) static int qdisc_dump_stab(struct sk_buff *skb, struct qdisc_size_table *stab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) struct nlattr *nest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) nest = nla_nest_start_noflag(skb, TCA_STAB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (nest == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (nla_put(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) nla_nest_end(skb, nest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) void __qdisc_calculate_pkt_len(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) const struct qdisc_size_table *stab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) int pkt_len, slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) pkt_len = skb->len + stab->szopts.overhead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) if (unlikely(!stab->szopts.tsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) slot = pkt_len + stab->szopts.cell_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (unlikely(slot < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) slot = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) slot >>= stab->szopts.cell_log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (likely(slot < stab->szopts.tsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) pkt_len = stab->data[slot];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) pkt_len = stab->data[stab->szopts.tsize - 1] *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) (slot / stab->szopts.tsize) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) stab->data[slot % stab->szopts.tsize];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) pkt_len <<= stab->szopts.size_log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (unlikely(pkt_len < 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) pkt_len = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) qdisc_skb_cb(skb)->pkt_len = pkt_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) EXPORT_SYMBOL(__qdisc_calculate_pkt_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) pr_warn("%s: %s qdisc %X: is non-work-conserving?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) txt, qdisc->ops->id, qdisc->handle >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) qdisc->flags |= TCQ_F_WARN_NONWC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) EXPORT_SYMBOL(qdisc_warn_nonwc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) __netif_schedule(qdisc_root(wd->qdisc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) void qdisc_watchdog_init_clockid(struct qdisc_watchdog *wd, struct Qdisc *qdisc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) clockid_t clockid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) hrtimer_init(&wd->timer, clockid, HRTIMER_MODE_ABS_PINNED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) wd->timer.function = qdisc_watchdog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) wd->qdisc = qdisc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) EXPORT_SYMBOL(qdisc_watchdog_init_clockid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) qdisc_watchdog_init_clockid(wd, qdisc, CLOCK_MONOTONIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) EXPORT_SYMBOL(qdisc_watchdog_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) void qdisc_watchdog_schedule_range_ns(struct qdisc_watchdog *wd, u64 expires,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) u64 delta_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) if (test_bit(__QDISC_STATE_DEACTIVATED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) &qdisc_root_sleeping(wd->qdisc)->state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (hrtimer_is_queued(&wd->timer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /* If timer is already set in [expires, expires + delta_ns],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * do not reprogram it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (wd->last_expires - expires <= delta_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) wd->last_expires = expires;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) hrtimer_start_range_ns(&wd->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) ns_to_ktime(expires),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) delta_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) HRTIMER_MODE_ABS_PINNED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) EXPORT_SYMBOL(qdisc_watchdog_schedule_range_ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) void qdisc_watchdog_cancel(struct qdisc_watchdog *wd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) hrtimer_cancel(&wd->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) EXPORT_SYMBOL(qdisc_watchdog_cancel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) static struct hlist_head *qdisc_class_hash_alloc(unsigned int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct hlist_head *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) h = kvmalloc_array(n, sizeof(struct hlist_head), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (h != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) for (i = 0; i < n; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) INIT_HLIST_HEAD(&h[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) void qdisc_class_hash_grow(struct Qdisc *sch, struct Qdisc_class_hash *clhash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct Qdisc_class_common *cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) struct hlist_node *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) struct hlist_head *nhash, *ohash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) unsigned int nsize, nmask, osize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) unsigned int i, h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /* Rehash when load factor exceeds 0.75 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (clhash->hashelems * 4 <= clhash->hashsize * 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) nsize = clhash->hashsize * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) nmask = nsize - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) nhash = qdisc_class_hash_alloc(nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (nhash == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) ohash = clhash->hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) osize = clhash->hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) sch_tree_lock(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) for (i = 0; i < osize; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) hlist_for_each_entry_safe(cl, next, &ohash[i], hnode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) h = qdisc_class_hash(cl->classid, nmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) hlist_add_head(&cl->hnode, &nhash[h]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) clhash->hash = nhash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) clhash->hashsize = nsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) clhash->hashmask = nmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) sch_tree_unlock(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) kvfree(ohash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) EXPORT_SYMBOL(qdisc_class_hash_grow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) int qdisc_class_hash_init(struct Qdisc_class_hash *clhash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) unsigned int size = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) clhash->hash = qdisc_class_hash_alloc(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (!clhash->hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) clhash->hashsize = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) clhash->hashmask = size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) clhash->hashelems = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) EXPORT_SYMBOL(qdisc_class_hash_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) void qdisc_class_hash_destroy(struct Qdisc_class_hash *clhash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) kvfree(clhash->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) EXPORT_SYMBOL(qdisc_class_hash_destroy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) void qdisc_class_hash_insert(struct Qdisc_class_hash *clhash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) struct Qdisc_class_common *cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) unsigned int h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) INIT_HLIST_NODE(&cl->hnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) h = qdisc_class_hash(cl->classid, clhash->hashmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) hlist_add_head(&cl->hnode, &clhash->hash[h]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) clhash->hashelems++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) EXPORT_SYMBOL(qdisc_class_hash_insert);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) void qdisc_class_hash_remove(struct Qdisc_class_hash *clhash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) struct Qdisc_class_common *cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) hlist_del(&cl->hnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) clhash->hashelems--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) EXPORT_SYMBOL(qdisc_class_hash_remove);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) /* Allocate an unique handle from space managed by kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * Possible range is [8000-FFFF]:0000 (0x8000 values)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) static u32 qdisc_alloc_handle(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) int i = 0x8000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) static u32 autohandle = TC_H_MAKE(0x80000000U, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) autohandle += TC_H_MAKE(0x10000U, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) if (autohandle == TC_H_MAKE(TC_H_ROOT, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) autohandle = TC_H_MAKE(0x80000000U, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) if (!qdisc_lookup(dev, autohandle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) return autohandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) } while (--i > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) void qdisc_tree_reduce_backlog(struct Qdisc *sch, int n, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) bool qdisc_is_offloaded = sch->flags & TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) const struct Qdisc_class_ops *cops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) unsigned long cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) u32 parentid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) bool notify;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) int drops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (n == 0 && len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) drops = max_t(int, n, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) while ((parentid = sch->parent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) if (TC_H_MAJ(parentid) == TC_H_MAJ(TC_H_INGRESS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (sch->flags & TCQ_F_NOPARENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) /* Notify parent qdisc only if child qdisc becomes empty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * If child was empty even before update then backlog
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) * counter is screwed and we skip notification because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) * parent class is already passive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * If the original child was offloaded then it is allowed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) * to be seem as empty, so the parent is notified anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) notify = !sch->q.qlen && !WARN_ON_ONCE(!n &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) !qdisc_is_offloaded);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) /* TODO: perform the search on a per txq basis */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) sch = qdisc_lookup(qdisc_dev(sch), TC_H_MAJ(parentid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (sch == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) WARN_ON_ONCE(parentid != TC_H_ROOT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) cops = sch->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) if (notify && cops->qlen_notify) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) cl = cops->find(sch, parentid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) cops->qlen_notify(sch, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) sch->q.qlen -= n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) sch->qstats.backlog -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) __qdisc_qstats_drop(sch, drops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) EXPORT_SYMBOL(qdisc_tree_reduce_backlog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) int qdisc_offload_dump_helper(struct Qdisc *sch, enum tc_setup_type type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) void *type_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct net_device *dev = qdisc_dev(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) sch->flags &= ~TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) err = dev->netdev_ops->ndo_setup_tc(dev, type, type_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) if (err == -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) sch->flags |= TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) EXPORT_SYMBOL(qdisc_offload_dump_helper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) struct Qdisc *new, struct Qdisc *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) enum tc_setup_type type, void *type_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) bool any_qdisc_is_offloaded;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) err = dev->netdev_ops->ndo_setup_tc(dev, type, type_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) /* Don't report error if the graft is part of destroy operation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (!err || !new || new == &noop_qdisc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) /* Don't report error if the parent, the old child and the new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * one are not offloaded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) any_qdisc_is_offloaded = new->flags & TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) any_qdisc_is_offloaded |= sch && sch->flags & TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) any_qdisc_is_offloaded |= old && old->flags & TCQ_F_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if (any_qdisc_is_offloaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) NL_SET_ERR_MSG(extack, "Offloading graft operation failed.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) EXPORT_SYMBOL(qdisc_offload_graft_helper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) static void qdisc_offload_graft_root(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) struct Qdisc *new, struct Qdisc *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) struct tc_root_qopt_offload graft_offload = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) .command = TC_ROOT_GRAFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) .handle = new ? new->handle : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) .ingress = (new && new->flags & TCQ_F_INGRESS) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) (old && old->flags & TCQ_F_INGRESS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) qdisc_offload_graft_helper(dev, NULL, new, old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) TC_SETUP_ROOT_QDISC, &graft_offload, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) u32 portid, u32 seq, u16 flags, int event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) struct gnet_stats_basic_cpu __percpu *cpu_bstats = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct gnet_stats_queue __percpu *cpu_qstats = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) struct tcmsg *tcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) unsigned char *b = skb_tail_pointer(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) struct gnet_dump d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct qdisc_size_table *stab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) u32 block_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) __u32 qlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) tcm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) tcm->tcm_family = AF_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) tcm->tcm__pad1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) tcm->tcm__pad2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) tcm->tcm_ifindex = qdisc_dev(q)->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) tcm->tcm_parent = clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) tcm->tcm_handle = q->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) tcm->tcm_info = refcount_read(&q->refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (nla_put_string(skb, TCA_KIND, q->ops->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (q->ops->ingress_block_get) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) block_index = q->ops->ingress_block_get(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (block_index &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) nla_put_u32(skb, TCA_INGRESS_BLOCK, block_index))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (q->ops->egress_block_get) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) block_index = q->ops->egress_block_get(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (block_index &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) nla_put_u32(skb, TCA_EGRESS_BLOCK, block_index))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) if (q->ops->dump && q->ops->dump(q, skb) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) if (nla_put_u8(skb, TCA_HW_OFFLOAD, !!(q->flags & TCQ_F_OFFLOADED)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) qlen = qdisc_qlen_sum(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) stab = rtnl_dereference(q->stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (stab && qdisc_dump_stab(skb, stab) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) NULL, &d, TCA_PAD) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (qdisc_is_percpu_stats(q)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) cpu_bstats = q->cpu_bstats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) cpu_qstats = q->cpu_qstats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (gnet_stats_copy_basic(qdisc_root_sleeping_running(q),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) &d, cpu_bstats, &q->bstats) < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) gnet_stats_copy_rate_est(&d, &q->rate_est) < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) gnet_stats_copy_queue(&d, cpu_qstats, &q->qstats, qlen) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) if (gnet_stats_finish_copy(&d) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) nlh->nlmsg_len = skb_tail_pointer(skb) - b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) out_nlmsg_trim:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) nlmsg_trim(skb, b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) static bool tc_qdisc_dump_ignore(struct Qdisc *q, bool dump_invisible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (q->flags & TCQ_F_BUILTIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if ((q->flags & TCQ_F_INVISIBLE) && !dump_invisible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) static int qdisc_notify(struct net *net, struct sk_buff *oskb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) struct nlmsghdr *n, u32 clid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) struct Qdisc *old, struct Qdisc *new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) if (old && !tc_qdisc_dump_ignore(old, false)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) if (tc_fill_qdisc(skb, old, clid, portid, n->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) 0, RTM_DELQDISC) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) if (new && !tc_qdisc_dump_ignore(new, false)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) if (tc_fill_qdisc(skb, new, clid, portid, n->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (skb->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) return rtnetlink_send(skb, net, portid, RTNLGRP_TC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) n->nlmsg_flags & NLM_F_ECHO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) static void notify_and_destroy(struct net *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) struct nlmsghdr *n, u32 clid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) struct Qdisc *old, struct Qdisc *new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) if (new || old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) qdisc_notify(net, skb, n, clid, old, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) if (old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) qdisc_put(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) static void qdisc_clear_nolock(struct Qdisc *sch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) sch->flags &= ~TCQ_F_NOLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) if (!(sch->flags & TCQ_F_CPUSTATS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) free_percpu(sch->cpu_bstats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) free_percpu(sch->cpu_qstats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) sch->cpu_bstats = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) sch->cpu_qstats = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) sch->flags &= ~TCQ_F_CPUSTATS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) /* Graft qdisc "new" to class "classid" of qdisc "parent" or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * to device "dev".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) * When appropriate send a netlink notification using 'skb'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) * and "n".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) * On success, destroy old qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) static int qdisc_graft(struct net_device *dev, struct Qdisc *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) struct sk_buff *skb, struct nlmsghdr *n, u32 classid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) struct Qdisc *new, struct Qdisc *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) struct Qdisc *q = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) if (parent == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) unsigned int i, num_q, ingress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) ingress = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) num_q = dev->num_tx_queues;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) if ((q && q->flags & TCQ_F_INGRESS) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) (new && new->flags & TCQ_F_INGRESS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) num_q = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) ingress = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (!dev_ingress_queue(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) NL_SET_ERR_MSG(extack, "Device does not have an ingress queue");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) if (dev->flags & IFF_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) dev_deactivate(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) qdisc_offload_graft_root(dev, new, old, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) if (new && new->ops->attach)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) for (i = 0; i < num_q; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) struct netdev_queue *dev_queue = dev_ingress_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) if (!ingress)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) dev_queue = netdev_get_tx_queue(dev, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) old = dev_graft_qdisc(dev_queue, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) if (new && i > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) qdisc_refcount_inc(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) if (!ingress)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) qdisc_put(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) skip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (!ingress) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) notify_and_destroy(net, skb, n, classid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) rtnl_dereference(dev->qdisc), new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) if (new && !new->ops->attach)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) qdisc_refcount_inc(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) rcu_assign_pointer(dev->qdisc, new ? : &noop_qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) if (new && new->ops->attach)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) new->ops->attach(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) notify_and_destroy(net, skb, n, classid, old, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) if (dev->flags & IFF_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) dev_activate(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) const struct Qdisc_class_ops *cops = parent->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) unsigned long cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) /* Only support running class lockless if parent is lockless */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) if (new && (new->flags & TCQ_F_NOLOCK) && !(parent->flags & TCQ_F_NOLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) qdisc_clear_nolock(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) if (!cops || !cops->graft)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) cl = cops->find(parent, classid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) if (!cl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) NL_SET_ERR_MSG(extack, "Specified class not found");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) err = cops->graft(parent, cl, new, &old, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) notify_and_destroy(net, skb, n, classid, old, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) static int qdisc_block_indexes_set(struct Qdisc *sch, struct nlattr **tca,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) u32 block_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) if (tca[TCA_INGRESS_BLOCK]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) block_index = nla_get_u32(tca[TCA_INGRESS_BLOCK]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (!block_index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) NL_SET_ERR_MSG(extack, "Ingress block index cannot be 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) if (!sch->ops->ingress_block_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) NL_SET_ERR_MSG(extack, "Ingress block sharing is not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) sch->ops->ingress_block_set(sch, block_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) if (tca[TCA_EGRESS_BLOCK]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) block_index = nla_get_u32(tca[TCA_EGRESS_BLOCK]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) if (!block_index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) NL_SET_ERR_MSG(extack, "Egress block index cannot be 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) if (!sch->ops->egress_block_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) NL_SET_ERR_MSG(extack, "Egress block sharing is not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) sch->ops->egress_block_set(sch, block_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) Allocate and initialize new qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) Parameters are passed via opt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) static struct Qdisc *qdisc_create(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) struct netdev_queue *dev_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) struct Qdisc *p, u32 parent, u32 handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) struct nlattr **tca, int *errp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) struct nlattr *kind = tca[TCA_KIND];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) struct Qdisc *sch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) struct Qdisc_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) struct qdisc_size_table *stab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) ops = qdisc_lookup_ops(kind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) #ifdef CONFIG_MODULES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) if (ops == NULL && kind != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) char name[IFNAMSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) /* We dropped the RTNL semaphore in order to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) * perform the module load. So, even if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) * succeeded in loading the module we have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) * tell the caller to replay the request. We
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) * indicate this using -EAGAIN.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) * We replay the request because the device may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) * go away in the mean time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) request_module("sch_%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) ops = qdisc_lookup_ops(kind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (ops != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) /* We will try again qdisc_lookup_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) * so don't keep a reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) module_put(ops->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) if (!ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) NL_SET_ERR_MSG(extack, "Specified qdisc kind is unknown");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) sch = qdisc_alloc(dev_queue, ops, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) if (IS_ERR(sch)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) err = PTR_ERR(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) goto err_out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) sch->parent = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) if (handle == TC_H_INGRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) sch->flags |= TCQ_F_INGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) handle = TC_H_MAKE(TC_H_INGRESS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) if (handle == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) handle = qdisc_alloc_handle(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) if (handle == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) NL_SET_ERR_MSG(extack, "Maximum number of qdisc handles was exceeded");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) err = -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) goto err_out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) if (!netif_is_multiqueue(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) sch->flags |= TCQ_F_ONETXQUEUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) sch->handle = handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) /* This exist to keep backward compatible with a userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) * loophole, what allowed userspace to get IFF_NO_QUEUE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * facility on older kernels by setting tx_queue_len=0 (prior
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * to qdisc init), and then forgot to reinit tx_queue_len
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) * before again attaching a qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) if ((dev->priv_flags & IFF_NO_QUEUE) && (dev->tx_queue_len == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) netdev_info(dev, "Caught tx_queue_len zero misconfig\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) err = qdisc_block_indexes_set(sch, tca, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) goto err_out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) if (ops->init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) err = ops->init(sch, tca[TCA_OPTIONS], extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) if (err != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) goto err_out5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) if (tca[TCA_STAB]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) stab = qdisc_get_stab(tca[TCA_STAB], extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) if (IS_ERR(stab)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) err = PTR_ERR(stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) goto err_out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) rcu_assign_pointer(sch->stab, stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) if (tca[TCA_RATE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) seqcount_t *running;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) if (sch->flags & TCQ_F_MQROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) NL_SET_ERR_MSG(extack, "Cannot attach rate estimator to a multi-queue root qdisc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) goto err_out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) if (sch->parent != TC_H_ROOT &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) !(sch->flags & TCQ_F_INGRESS) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) (!p || !(p->flags & TCQ_F_MQROOT)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) running = qdisc_root_sleeping_running(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) running = &sch->running;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) err = gen_new_estimator(&sch->bstats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) sch->cpu_bstats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) &sch->rate_est,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) running,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) tca[TCA_RATE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) NL_SET_ERR_MSG(extack, "Failed to generate new estimator");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) goto err_out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) qdisc_hash_add(sch, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) trace_qdisc_create(ops, dev, parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) return sch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) err_out5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) /* ops->init() failed, we call ->destroy() like qdisc_create_dflt() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) if (ops->destroy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) ops->destroy(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) err_out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) qdisc_free(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) err_out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) module_put(ops->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) *errp = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) err_out4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) * Any broken qdiscs that would require a ops->reset() here?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) * The qdisc was never in action so it shouldn't be necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) qdisc_put_stab(rtnl_dereference(sch->stab));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) if (ops->destroy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) ops->destroy(sch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) goto err_out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) static int qdisc_change(struct Qdisc *sch, struct nlattr **tca,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) struct qdisc_size_table *ostab, *stab = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) if (tca[TCA_OPTIONS]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) if (!sch->ops->change) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) NL_SET_ERR_MSG(extack, "Change operation not supported by specified qdisc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) if (tca[TCA_INGRESS_BLOCK] || tca[TCA_EGRESS_BLOCK]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) NL_SET_ERR_MSG(extack, "Change of blocks is not supported");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) err = sch->ops->change(sch, tca[TCA_OPTIONS], extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) if (tca[TCA_STAB]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) stab = qdisc_get_stab(tca[TCA_STAB], extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) if (IS_ERR(stab))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) return PTR_ERR(stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) ostab = rtnl_dereference(sch->stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) rcu_assign_pointer(sch->stab, stab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) qdisc_put_stab(ostab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) if (tca[TCA_RATE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) /* NB: ignores errors from replace_estimator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) because change can't be undone. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) if (sch->flags & TCQ_F_MQROOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) gen_replace_estimator(&sch->bstats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) sch->cpu_bstats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) &sch->rate_est,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) qdisc_root_sleeping_running(sch),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) tca[TCA_RATE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) struct check_loop_arg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) struct qdisc_walker w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) struct Qdisc *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) int depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) static int check_loop_fn(struct Qdisc *q, unsigned long cl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) struct qdisc_walker *w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) static int check_loop(struct Qdisc *q, struct Qdisc *p, int depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) struct check_loop_arg arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) if (q->ops->cl_ops == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) arg.w.stop = arg.w.skip = arg.w.count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) arg.w.fn = check_loop_fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) arg.depth = depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) arg.p = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) q->ops->cl_ops->walk(q, &arg.w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) return arg.w.stop ? -ELOOP : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) struct Qdisc *leaf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) const struct Qdisc_class_ops *cops = q->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) struct check_loop_arg *arg = (struct check_loop_arg *)w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) leaf = cops->leaf(q, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) if (leaf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) if (leaf == arg->p || arg->depth > 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) return -ELOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) return check_loop(leaf, arg->p, arg->depth + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) const struct nla_policy rtm_tca_policy[TCA_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) [TCA_KIND] = { .type = NLA_STRING },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) [TCA_RATE] = { .type = NLA_BINARY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) .len = sizeof(struct tc_estimator) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) [TCA_STAB] = { .type = NLA_NESTED },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) [TCA_DUMP_INVISIBLE] = { .type = NLA_FLAG },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) [TCA_CHAIN] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) [TCA_INGRESS_BLOCK] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) [TCA_EGRESS_BLOCK] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) * Delete/get qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) struct tcmsg *tcm = nlmsg_data(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) struct nlattr *tca[TCA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) u32 clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) struct Qdisc *q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) struct Qdisc *p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) if ((n->nlmsg_type != RTM_GETQDISC) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) err = nlmsg_parse_deprecated(n, sizeof(*tcm), tca, TCA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) rtm_tca_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) dev = __dev_get_by_index(net, tcm->tcm_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) clid = tcm->tcm_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) if (clid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) if (clid != TC_H_ROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) if (TC_H_MAJ(clid) != TC_H_MAJ(TC_H_INGRESS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) p = qdisc_lookup(dev, TC_H_MAJ(clid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) NL_SET_ERR_MSG(extack, "Failed to find qdisc with specified classid");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) q = qdisc_leaf(p, clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) } else if (dev_ingress_queue(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) q = dev_ingress_queue(dev)->qdisc_sleeping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) q = rtnl_dereference(dev->qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) if (!q) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) NL_SET_ERR_MSG(extack, "Cannot find specified qdisc on specified device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) if (tcm->tcm_handle && q->handle != tcm->tcm_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) NL_SET_ERR_MSG(extack, "Invalid handle");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) q = qdisc_lookup(dev, tcm->tcm_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) if (!q) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) NL_SET_ERR_MSG(extack, "Failed to find qdisc with specified handle");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) NL_SET_ERR_MSG(extack, "Invalid qdisc name");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) if (n->nlmsg_type == RTM_DELQDISC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) if (!clid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) NL_SET_ERR_MSG(extack, "Classid cannot be zero");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) if (q->handle == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) NL_SET_ERR_MSG(extack, "Cannot delete qdisc with handle of zero");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) err = qdisc_graft(dev, p, skb, n, clid, NULL, q, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) if (err != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) qdisc_notify(net, skb, n, clid, NULL, q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) * Create/change qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) struct tcmsg *tcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) struct nlattr *tca[TCA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) u32 clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) struct Qdisc *q, *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) replay:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) /* Reinit, just in case something touches this. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) err = nlmsg_parse_deprecated(n, sizeof(*tcm), tca, TCA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) rtm_tca_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) tcm = nlmsg_data(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) clid = tcm->tcm_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) q = p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) dev = __dev_get_by_index(net, tcm->tcm_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) if (clid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) if (clid != TC_H_ROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) if (clid != TC_H_INGRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) p = qdisc_lookup(dev, TC_H_MAJ(clid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) NL_SET_ERR_MSG(extack, "Failed to find specified qdisc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) q = qdisc_leaf(p, clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) } else if (dev_ingress_queue_create(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) q = dev_ingress_queue(dev)->qdisc_sleeping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) q = rtnl_dereference(dev->qdisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) /* It may be default qdisc, ignore it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) if (q && q->handle == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) if (!q || !tcm->tcm_handle || q->handle != tcm->tcm_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) if (tcm->tcm_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) if (q && !(n->nlmsg_flags & NLM_F_REPLACE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) NL_SET_ERR_MSG(extack, "NLM_F_REPLACE needed to override");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) if (TC_H_MIN(tcm->tcm_handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) NL_SET_ERR_MSG(extack, "Invalid minor handle");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) q = qdisc_lookup(dev, tcm->tcm_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) if (!q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) goto create_n_graft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) if (n->nlmsg_flags & NLM_F_EXCL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) NL_SET_ERR_MSG(extack, "Exclusivity flag on, cannot override");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) if (tca[TCA_KIND] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) nla_strcmp(tca[TCA_KIND], q->ops->id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) NL_SET_ERR_MSG(extack, "Invalid qdisc name");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) if (q == p ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) (p && check_loop(q, p, 0))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) NL_SET_ERR_MSG(extack, "Qdisc parent/child loop detected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) return -ELOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) qdisc_refcount_inc(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) goto graft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) if (!q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) goto create_n_graft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) /* This magic test requires explanation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) * We know, that some child q is already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) * attached to this parent and have choice:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) * either to change it or to create/graft new one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) * 1. We are allowed to create/graft only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) * if CREATE and REPLACE flags are set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) * 2. If EXCL is set, requestor wanted to say,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) * that qdisc tcm_handle is not expected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) * to exist, so that we choose create/graft too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) * 3. The last case is when no flags are set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) * Alas, it is sort of hole in API, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) * cannot decide what to do unambiguously.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) * For now we select create/graft, if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) * user gave KIND, which does not match existing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) if ((n->nlmsg_flags & NLM_F_CREATE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) (n->nlmsg_flags & NLM_F_REPLACE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) ((n->nlmsg_flags & NLM_F_EXCL) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) (tca[TCA_KIND] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) nla_strcmp(tca[TCA_KIND], q->ops->id))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) goto create_n_graft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) if (!tcm->tcm_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) NL_SET_ERR_MSG(extack, "Handle cannot be zero");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) q = qdisc_lookup(dev, tcm->tcm_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) /* Change qdisc parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) if (!q) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) NL_SET_ERR_MSG(extack, "Specified qdisc not found");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) if (n->nlmsg_flags & NLM_F_EXCL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) NL_SET_ERR_MSG(extack, "Exclusivity flag on, cannot modify");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) NL_SET_ERR_MSG(extack, "Invalid qdisc name");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) err = qdisc_change(q, tca, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) if (err == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) qdisc_notify(net, skb, n, clid, NULL, q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) create_n_graft:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) if (!(n->nlmsg_flags & NLM_F_CREATE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) NL_SET_ERR_MSG(extack, "Qdisc not found. To create specify NLM_F_CREATE flag");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) if (clid == TC_H_INGRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) if (dev_ingress_queue(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) q = qdisc_create(dev, dev_ingress_queue(dev), p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) tcm->tcm_parent, tcm->tcm_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) tca, &err, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) NL_SET_ERR_MSG(extack, "Cannot find ingress queue for specified device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) struct netdev_queue *dev_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) if (p && p->ops->cl_ops && p->ops->cl_ops->select_queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) dev_queue = p->ops->cl_ops->select_queue(p, tcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) else if (p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) dev_queue = p->dev_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) dev_queue = netdev_get_tx_queue(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) q = qdisc_create(dev, dev_queue, p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) tcm->tcm_parent, tcm->tcm_handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) tca, &err, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) if (q == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) if (err == -EAGAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) goto replay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) graft:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) err = qdisc_graft(dev, p, skb, n, clid, q, NULL, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) if (q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) qdisc_put(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) int *q_idx_p, int s_q_idx, bool recur,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) bool dump_invisible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) int ret = 0, q_idx = *q_idx_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) struct Qdisc *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) int b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) q = root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) if (q_idx < s_q_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) q_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) if (!tc_qdisc_dump_ignore(q, dump_invisible) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) cb->nlh->nlmsg_seq, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) RTM_NEWQDISC) <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) q_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) /* If dumping singletons, there is no qdisc_dev(root) and the singleton
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) * itself has already been dumped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) * If we've already dumped the top-level (ingress) qdisc above and the global
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) * qdisc hashtable, we don't want to hit it again
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) if (!qdisc_dev(root) || !recur)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) hash_for_each(qdisc_dev(root)->qdisc_hash, b, q, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) if (q_idx < s_q_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) q_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) if (!tc_qdisc_dump_ignore(q, dump_invisible) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) cb->nlh->nlmsg_seq, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) RTM_NEWQDISC) <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) q_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) *q_idx_p = q_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) int idx, q_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) int s_idx, s_q_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) const struct nlmsghdr *nlh = cb->nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) struct nlattr *tca[TCA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) s_idx = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) s_q_idx = q_idx = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) err = nlmsg_parse_deprecated(nlh, sizeof(struct tcmsg), tca, TCA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) rtm_tca_policy, cb->extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) for_each_netdev(net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) struct netdev_queue *dev_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) if (idx < s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) if (idx > s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) s_q_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) q_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) if (tc_dump_qdisc_root(rtnl_dereference(dev->qdisc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) skb, cb, &q_idx, s_q_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) true, tca[TCA_DUMP_INVISIBLE]) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) dev_queue = dev_ingress_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) if (dev_queue &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) &q_idx, s_q_idx, false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) tca[TCA_DUMP_INVISIBLE]) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) cb->args[0] = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) cb->args[1] = q_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) /************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) * Traffic classes manipulation. *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) ************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) unsigned long cl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) u32 portid, u32 seq, u16 flags, int event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) struct tcmsg *tcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) unsigned char *b = skb_tail_pointer(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) struct gnet_dump d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) const struct Qdisc_class_ops *cl_ops = q->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) tcm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) tcm->tcm_family = AF_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) tcm->tcm__pad1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) tcm->tcm__pad2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) tcm->tcm_ifindex = qdisc_dev(q)->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) tcm->tcm_parent = q->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) tcm->tcm_handle = q->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) tcm->tcm_info = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) if (nla_put_string(skb, TCA_KIND, q->ops->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) NULL, &d, TCA_PAD) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) if (gnet_stats_finish_copy(&d) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) nlh->nlmsg_len = skb_tail_pointer(skb) - b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) out_nlmsg_trim:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) nlmsg_trim(skb, b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) static int tclass_notify(struct net *net, struct sk_buff *oskb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) struct nlmsghdr *n, struct Qdisc *q,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) unsigned long cl, int event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0, event) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) n->nlmsg_flags & NLM_F_ECHO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) static int tclass_del_notify(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) const struct Qdisc_class_ops *cops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) struct sk_buff *oskb, struct nlmsghdr *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) struct Qdisc *q, unsigned long cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) if (!cops->delete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) RTM_DELTCLASS) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) err = cops->delete(q, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) n->nlmsg_flags & NLM_F_ECHO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) #ifdef CONFIG_NET_CLS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) struct tcf_bind_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) struct tcf_walker w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) unsigned long base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) unsigned long cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) u32 classid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) static int tcf_node_bind(struct tcf_proto *tp, void *n, struct tcf_walker *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) struct tcf_bind_args *a = (void *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) if (tp->ops->bind_class) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) struct Qdisc *q = tcf_block_q(tp->chain->block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) sch_tree_lock(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) tp->ops->bind_class(n, a->classid, a->cl, q, a->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) sch_tree_unlock(q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) struct tc_bind_class_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) struct qdisc_walker w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) unsigned long new_cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) u32 portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) u32 clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) static int tc_bind_class_walker(struct Qdisc *q, unsigned long cl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) struct qdisc_walker *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) struct tc_bind_class_args *a = (struct tc_bind_class_args *)w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) const struct Qdisc_class_ops *cops = q->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) struct tcf_block *block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) struct tcf_chain *chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) block = cops->tcf_block(q, cl, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) if (!block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) for (chain = tcf_get_next_chain(block, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) chain = tcf_get_next_chain(block, chain)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) struct tcf_proto *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) for (tp = tcf_get_next_proto(chain, NULL, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) tp; tp = tcf_get_next_proto(chain, tp, true)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) struct tcf_bind_args arg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) arg.w.fn = tcf_node_bind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) arg.classid = a->clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) arg.base = cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) arg.cl = a->new_cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) tp->ops->walk(tp, &arg.w, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) static void tc_bind_tclass(struct Qdisc *q, u32 portid, u32 clid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) unsigned long new_cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) const struct Qdisc_class_ops *cops = q->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) struct tc_bind_class_args args = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) if (!cops->tcf_block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) args.portid = portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) args.clid = clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) args.new_cl = new_cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) args.w.fn = tc_bind_class_walker;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) q->ops->cl_ops->walk(q, &args.w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) static void tc_bind_tclass(struct Qdisc *q, u32 portid, u32 clid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) unsigned long new_cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) struct tcmsg *tcm = nlmsg_data(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) struct nlattr *tca[TCA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) struct Qdisc *q = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) const struct Qdisc_class_ops *cops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) unsigned long cl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) unsigned long new_cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) u32 portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) u32 clid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) u32 qid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) if ((n->nlmsg_type != RTM_GETTCLASS) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) err = nlmsg_parse_deprecated(n, sizeof(*tcm), tca, TCA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) rtm_tca_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) dev = __dev_get_by_index(net, tcm->tcm_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) parent == TC_H_UNSPEC - unspecified parent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) parent == TC_H_ROOT - class is root, which has no parent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) parent == X:0 - parent is root class.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) parent == X:Y - parent is a node in hierarchy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) parent == 0:Y - parent is X:Y, where X:0 is qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) handle == 0:0 - generate handle from kernel pool.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) handle == 0:Y - class is X:Y, where X:0 is qdisc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) handle == X:Y - clear.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) handle == X:0 - root class.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) /* Step 1. Determine qdisc handle X:0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) portid = tcm->tcm_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) clid = tcm->tcm_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) qid = TC_H_MAJ(clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) if (portid != TC_H_ROOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) u32 qid1 = TC_H_MAJ(portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) if (qid && qid1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) /* If both majors are known, they must be identical. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) if (qid != qid1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) } else if (qid1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) qid = qid1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) } else if (qid == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) qid = rtnl_dereference(dev->qdisc)->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) /* Now qid is genuine qdisc handle consistent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) * both with parent and child.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) * TC_H_MAJ(portid) still may be unspecified, complete it now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) if (portid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) portid = TC_H_MAKE(qid, portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) if (qid == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) qid = rtnl_dereference(dev->qdisc)->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) /* OK. Locate qdisc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) q = qdisc_lookup(dev, qid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) if (!q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) /* An check that it supports classes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) cops = q->ops->cl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) if (cops == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) /* Now try to get class */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) if (clid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) if (portid == TC_H_ROOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) clid = qid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) clid = TC_H_MAKE(qid, clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) if (clid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) cl = cops->find(q, clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) if (cl == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) if (n->nlmsg_type != RTM_NEWTCLASS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) !(n->nlmsg_flags & NLM_F_CREATE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) switch (n->nlmsg_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) case RTM_NEWTCLASS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) err = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) if (n->nlmsg_flags & NLM_F_EXCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) case RTM_DELTCLASS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) err = tclass_del_notify(net, cops, skb, n, q, cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) /* Unbind the class with flilters with 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) tc_bind_tclass(q, portid, clid, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) case RTM_GETTCLASS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) err = tclass_notify(net, skb, n, q, cl, RTM_NEWTCLASS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) if (tca[TCA_INGRESS_BLOCK] || tca[TCA_EGRESS_BLOCK]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) NL_SET_ERR_MSG(extack, "Shared blocks are not supported for classes");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) new_cl = cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) if (cops->change)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) err = cops->change(q, clid, portid, tca, &new_cl, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) if (err == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) tclass_notify(net, skb, n, q, new_cl, RTM_NEWTCLASS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) /* We just create a new class, need to do reverse binding. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) if (cl != new_cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) tc_bind_tclass(q, portid, clid, new_cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) struct qdisc_dump_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) struct qdisc_walker w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) struct netlink_callback *cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) static int qdisc_class_dump(struct Qdisc *q, unsigned long cl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) struct qdisc_walker *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) struct qdisc_dump_args *a = (struct qdisc_dump_args *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) a->cb->nlh->nlmsg_seq, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) RTM_NEWTCLASS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) static int tc_dump_tclass_qdisc(struct Qdisc *q, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) struct tcmsg *tcm, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) int *t_p, int s_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) struct qdisc_dump_args arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) if (tc_qdisc_dump_ignore(q, false) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) *t_p < s_t || !q->ops->cl_ops ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) (tcm->tcm_parent &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) TC_H_MAJ(tcm->tcm_parent) != q->handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) (*t_p)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) if (*t_p > s_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) arg.w.fn = qdisc_class_dump;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) arg.skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) arg.cb = cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) arg.w.stop = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) arg.w.skip = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) arg.w.count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) q->ops->cl_ops->walk(q, &arg.w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) cb->args[1] = arg.w.count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) if (arg.w.stop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) (*t_p)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) struct tcmsg *tcm, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) int *t_p, int s_t, bool recur)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) struct Qdisc *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) int b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) if (!qdisc_dev(root) || !recur)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) if (tcm->tcm_parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) q = qdisc_match_from_root(root, TC_H_MAJ(tcm->tcm_parent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) if (q && q != root &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) hash_for_each(qdisc_dev(root)->qdisc_hash, b, q, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) struct tcmsg *tcm = nlmsg_data(cb->nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) struct netdev_queue *dev_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) int t, s_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) if (nlmsg_len(cb->nlh) < sizeof(*tcm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) dev = dev_get_by_index(net, tcm->tcm_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) s_t = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) t = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) if (tc_dump_tclass_root(rtnl_dereference(dev->qdisc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) skb, tcm, cb, &t, s_t, true) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) dev_queue = dev_ingress_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) if (dev_queue &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) &t, s_t, false) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) cb->args[0] = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) static int psched_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) seq_printf(seq, "%08x %08x %08x %08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) (u32)NSEC_PER_USEC, (u32)PSCHED_TICKS2NS(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) 1000000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) (u32)NSEC_PER_SEC / hrtimer_resolution);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) static int __net_init psched_net_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) struct proc_dir_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) e = proc_create_single("psched", 0, net->proc_net, psched_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) if (e == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) static void __net_exit psched_net_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) remove_proc_entry("psched", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) static int __net_init psched_net_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) static void __net_exit psched_net_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) static struct pernet_operations psched_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) .init = psched_net_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) .exit = psched_net_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) static int __init pktsched_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) err = register_pernet_subsys(&psched_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) pr_err("pktsched_init: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) "cannot initialize per netns operations\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) register_qdisc(&pfifo_fast_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) register_qdisc(&pfifo_qdisc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) register_qdisc(&bfifo_qdisc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) register_qdisc(&pfifo_head_drop_qdisc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) register_qdisc(&mq_qdisc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) register_qdisc(&noqueue_qdisc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) subsys_initcall(pktsched_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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