1e90474c37
Convert packet schedulers to use the netlink API. Unfortunately a gradual conversion is not possible without breaking compilation in the middle or adding lots of casts, so this patch converts them all in one step. The patch has been mostly generated automatically with some minor edits to at least allow seperate conversion of classifiers and actions. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
242 lines
6.5 KiB
C
242 lines
6.5 KiB
C
/*
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* net/core/gen_stats.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Thomas Graf <tgraf@suug.ch>
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* Jamal Hadi Salim
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* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* See Documentation/networking/gen_stats.txt
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/socket.h>
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#include <linux/rtnetlink.h>
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#include <linux/gen_stats.h>
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#include <net/netlink.h>
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#include <net/gen_stats.h>
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static inline int
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gnet_stats_copy(struct gnet_dump *d, int type, void *buf, int size)
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{
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NLA_PUT(d->skb, type, size, buf);
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return 0;
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nla_put_failure:
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spin_unlock_bh(d->lock);
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return -1;
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}
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/**
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* gnet_stats_start_copy_compat - start dumping procedure in compatibility mode
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* @skb: socket buffer to put statistics TLVs into
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* @type: TLV type for top level statistic TLV
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* @tc_stats_type: TLV type for backward compatibility struct tc_stats TLV
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* @xstats_type: TLV type for backward compatibility xstats TLV
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* @lock: statistics lock
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* @d: dumping handle
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*
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* Initializes the dumping handle, grabs the statistic lock and appends
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* an empty TLV header to the socket buffer for use a container for all
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* other statistic TLVS.
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*
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* The dumping handle is marked to be in backward compatibility mode telling
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* all gnet_stats_copy_XXX() functions to fill a local copy of struct tc_stats.
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*
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* Returns 0 on success or -1 if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
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int xstats_type, spinlock_t *lock, struct gnet_dump *d)
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__acquires(lock)
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{
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memset(d, 0, sizeof(*d));
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spin_lock_bh(lock);
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d->lock = lock;
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if (type)
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d->tail = (struct nlattr *)skb_tail_pointer(skb);
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d->skb = skb;
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d->compat_tc_stats = tc_stats_type;
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d->compat_xstats = xstats_type;
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if (d->tail)
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return gnet_stats_copy(d, type, NULL, 0);
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return 0;
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}
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/**
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* gnet_stats_start_copy_compat - start dumping procedure in compatibility mode
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* @skb: socket buffer to put statistics TLVs into
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* @type: TLV type for top level statistic TLV
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* @lock: statistics lock
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* @d: dumping handle
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*
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* Initializes the dumping handle, grabs the statistic lock and appends
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* an empty TLV header to the socket buffer for use a container for all
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* other statistic TLVS.
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*
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* Returns 0 on success or -1 if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
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struct gnet_dump *d)
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{
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return gnet_stats_start_copy_compat(skb, type, 0, 0, lock, d);
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}
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/**
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* gnet_stats_copy_basic - copy basic statistics into statistic TLV
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* @d: dumping handle
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* @b: basic statistics
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*
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* Appends the basic statistics to the top level TLV created by
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* gnet_stats_start_copy().
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*
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* Returns 0 on success or -1 with the statistic lock released
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* if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic *b)
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{
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if (d->compat_tc_stats) {
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d->tc_stats.bytes = b->bytes;
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d->tc_stats.packets = b->packets;
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}
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if (d->tail)
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return gnet_stats_copy(d, TCA_STATS_BASIC, b, sizeof(*b));
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return 0;
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}
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/**
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* gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
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* @d: dumping handle
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* @r: rate estimator statistics
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*
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* Appends the rate estimator statistics to the top level TLV created by
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* gnet_stats_start_copy().
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*
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* Returns 0 on success or -1 with the statistic lock released
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* if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_copy_rate_est(struct gnet_dump *d, struct gnet_stats_rate_est *r)
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{
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if (d->compat_tc_stats) {
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d->tc_stats.bps = r->bps;
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d->tc_stats.pps = r->pps;
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}
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if (d->tail)
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return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
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return 0;
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}
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/**
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* gnet_stats_copy_queue - copy queue statistics into statistics TLV
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* @d: dumping handle
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* @q: queue statistics
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*
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* Appends the queue statistics to the top level TLV created by
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* gnet_stats_start_copy().
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*
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* Returns 0 on success or -1 with the statistic lock released
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* if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
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{
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if (d->compat_tc_stats) {
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d->tc_stats.drops = q->drops;
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d->tc_stats.qlen = q->qlen;
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d->tc_stats.backlog = q->backlog;
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d->tc_stats.overlimits = q->overlimits;
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}
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if (d->tail)
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return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
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return 0;
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}
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/**
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* gnet_stats_copy_app - copy application specific statistics into statistics TLV
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* @d: dumping handle
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* @st: application specific statistics data
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* @len: length of data
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*
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* Appends the application sepecific statistics to the top level TLV created by
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* gnet_stats_start_copy() and remembers the data for XSTATS if the dumping
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* handle is in backward compatibility mode.
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*
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* Returns 0 on success or -1 with the statistic lock released
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* if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
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{
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if (d->compat_xstats) {
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d->xstats = st;
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d->xstats_len = len;
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}
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if (d->tail)
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return gnet_stats_copy(d, TCA_STATS_APP, st, len);
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return 0;
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}
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/**
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* gnet_stats_finish_copy - finish dumping procedure
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* @d: dumping handle
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*
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* Corrects the length of the top level TLV to include all TLVs added
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* by gnet_stats_copy_XXX() calls. Adds the backward compatibility TLVs
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* if gnet_stats_start_copy_compat() was used and releases the statistics
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* lock.
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*
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* Returns 0 on success or -1 with the statistic lock released
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* if the room in the socket buffer was not sufficient.
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*/
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int
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gnet_stats_finish_copy(struct gnet_dump *d)
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{
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if (d->tail)
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d->tail->nla_len = skb_tail_pointer(d->skb) - (u8 *)d->tail;
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if (d->compat_tc_stats)
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if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
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sizeof(d->tc_stats)) < 0)
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return -1;
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if (d->compat_xstats && d->xstats) {
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if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
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d->xstats_len) < 0)
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return -1;
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}
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spin_unlock_bh(d->lock);
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return 0;
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}
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EXPORT_SYMBOL(gnet_stats_start_copy);
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EXPORT_SYMBOL(gnet_stats_start_copy_compat);
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EXPORT_SYMBOL(gnet_stats_copy_basic);
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EXPORT_SYMBOL(gnet_stats_copy_rate_est);
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EXPORT_SYMBOL(gnet_stats_copy_queue);
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EXPORT_SYMBOL(gnet_stats_copy_app);
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EXPORT_SYMBOL(gnet_stats_finish_copy);
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