eddfbb763d
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
98 lines
3.6 KiB
C
98 lines
3.6 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)icmp_var.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_ICMP_VAR_H_
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#define _NETINET_ICMP_VAR_H_
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/*
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* Variables related to this implementation
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* of the internet control message protocol.
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*/
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struct icmpstat {
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/* statistics related to icmp packets generated */
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u_long icps_error; /* # of calls to icmp_error */
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u_long icps_oldshort; /* no error 'cuz old ip too short */
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u_long icps_oldicmp; /* no error 'cuz old was icmp */
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u_long icps_outhist[ICMP_MAXTYPE + 1];
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/* statistics related to input messages processed */
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u_long icps_badcode; /* icmp_code out of range */
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u_long icps_tooshort; /* packet < ICMP_MINLEN */
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u_long icps_checksum; /* bad checksum */
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u_long icps_badlen; /* calculated bound mismatch */
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u_long icps_reflect; /* number of responses */
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u_long icps_inhist[ICMP_MAXTYPE + 1];
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u_long icps_bmcastecho; /* b/mcast echo requests dropped */
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u_long icps_bmcasttstamp; /* b/mcast tstamp requests dropped */
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u_long icps_badaddr; /* bad return address */
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u_long icps_noroute; /* no route back */
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};
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#ifdef _KERNEL
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#define ICMPSTAT_ADD(name, val) V_icmpstat.name += (val)
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#define ICMPSTAT_INC(name) ICMPSTAT_ADD(name, 1)
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#endif
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/*
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* Names for ICMP sysctl objects
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*/
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#define ICMPCTL_MASKREPL 1 /* allow replies to netmask requests */
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#define ICMPCTL_STATS 2 /* statistics (read-only) */
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#define ICMPCTL_ICMPLIM 3
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#define ICMPCTL_MAXID 4
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#define ICMPCTL_NAMES { \
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{ 0, 0 }, \
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{ "maskrepl", CTLTYPE_INT }, \
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{ "stats", CTLTYPE_STRUCT }, \
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{ "icmplim", CTLTYPE_INT }, \
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}
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#ifdef _KERNEL
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SYSCTL_DECL(_net_inet_icmp);
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VNET_DECLARE(struct icmpstat, icmpstat); /* icmp statistics. */
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#define V_icmpstat VNET_GET(icmpstat)
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extern int badport_bandlim(int);
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#define BANDLIM_UNLIMITED -1
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#define BANDLIM_ICMP_UNREACH 0
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#define BANDLIM_ICMP_ECHO 1
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#define BANDLIM_ICMP_TSTAMP 2
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#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
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#define BANDLIM_RST_OPENPORT 4 /* No connection, listener */
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#define BANDLIM_ICMP6_UNREACH 5
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#define BANDLIM_MAX 5
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#endif
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#endif
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