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freebsd-nq/sys/netnatm/natm_pcb.c

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/* -> /*- for license, minor formatting changes
2005-01-07 01:45:51 +00:00
/*-
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
* Copyright (c) 1996 Charles D. Cranor and Washington University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor and
* Washington University.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Factor out my copyrights + licenses from Charles D. Cranor and University of Washington copyrights, which include the advertising clause. Move $NetBSD$ into standard location for FreeBSD source files, and normalize formatting. MFC after: 3 days
2007-01-08 22:30:39 +00:00
*
* $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
*/
/*
* atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
* from trying to use each other's VCs.
*/
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
#include "opt_ddb.h"
Use __FBSDID().
2003-06-11 05:37:42 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
#include <sys/param.h>
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
#include <sys/kernel.h>
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
#include <sys/malloc.h>
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
#include <sys/systm.h>
Last major round (Unless Bruce thinks of somthing :-) of malloc changes. Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
1997-10-12 20:26:33 +00:00
#include <sys/socket.h>
Fixed a sloppy common-style declaration. natm_pcb.c: Include <sys/socketvar.h> which will be used when M_PCB is declared in the right place.
1997-12-20 00:13:51 +00:00
#include <sys/socketvar.h>
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
#include <net/if.h>
#include <netinet/in.h>
#include <netnatm/natm.h>
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
#include <ddb/ddb.h>
Fixed a sloppy common-style declaration. natm_pcb.c: Include <sys/socketvar.h> which will be used when M_PCB is declared in the right place.
1997-12-20 00:13:51 +00:00
struct npcblist natm_pcbs;
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
/*
* npcb_alloc: allocate a npcb [in the free state]
*/
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
struct natmpcb *
npcb_alloc(int wait)
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
{
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
struct natmpcb *npcb;
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
npcb = malloc(sizeof(*npcb), M_PCB, wait | M_ZERO);
if (npcb != NULL)
npcb->npcb_flags = NPCB_FREE;
return (npcb);
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
}
/*
* npcb_free: free a npcb
*/
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
void
npcb_free(struct natmpcb *npcb, int op)
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
{
Lock down netnatm and mark as MPSAFE: - Introduce a subsystem mutex, natm_mtx, manipulated with accessor macros NATM_LOCK_INIT(), NATM_LOCK(), NATM_UNLOCK(), NATM_LOCK_ASSERT(). It protects the consistency of pcb-related data structures. Finer grained locking is possible, but should be done in the context of specific measurements (as very little work is done in netnatm -- most is in the ATM device driver or socket layer, so there's probably not much contention). - Remove GIANT_REQUIRED, mark as NETISR_MPSAFE, remove NET_NEEDS_GIANT("netnatm"). - Conditionally acquire Giant when entering network interfaces for ifp->if_ioctl() using IFF_LOCKGIANT(ifp)/IFF_UNLOCKGIANT(ifp) in order to coexist with non-MPSAFE atm ifnet drivers.. - De-spl. MFC after: 2 weeks Reviewed by: harti, bms (various versions)
2005-07-18 16:55:46 +00:00
NATM_LOCK_ASSERT();
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
if ((npcb->npcb_flags & NPCB_FREE) == 0) {
LIST_REMOVE(npcb, pcblist);
npcb->npcb_flags = NPCB_FREE;
}
if (op == NPCB_DESTROY) {
if (npcb->npcb_inq) {
npcb->npcb_flags = NPCB_DRAIN; /* flag for distruct. */
} else {
Retire the MALLOC and FREE macros. They are an abomination unto style(9). MFC after: 3 months
2008-10-23 15:53:51 +00:00
free(npcb, M_PCB); /* kill it! */
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
}
}
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
}
/*
* npcb_add: add or remove npcb from main list
* returns npcb if ok
*/
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
struct natmpcb *
npcb_add(struct natmpcb *npcb, struct ifnet *ifp, u_int16_t vci, u_int8_t vpi)
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
{
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
struct natmpcb *cpcb = NULL; /* current pcb */
Lock down netnatm and mark as MPSAFE: - Introduce a subsystem mutex, natm_mtx, manipulated with accessor macros NATM_LOCK_INIT(), NATM_LOCK(), NATM_UNLOCK(), NATM_LOCK_ASSERT(). It protects the consistency of pcb-related data structures. Finer grained locking is possible, but should be done in the context of specific measurements (as very little work is done in netnatm -- most is in the ATM device driver or socket layer, so there's probably not much contention). - Remove GIANT_REQUIRED, mark as NETISR_MPSAFE, remove NET_NEEDS_GIANT("netnatm"). - Conditionally acquire Giant when entering network interfaces for ifp->if_ioctl() using IFF_LOCKGIANT(ifp)/IFF_UNLOCKGIANT(ifp) in order to coexist with non-MPSAFE atm ifnet drivers.. - De-spl. MFC after: 2 weeks Reviewed by: harti, bms (various versions)
2005-07-18 16:55:46 +00:00
NATM_LOCK_ASSERT();
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
/*
* lookup required
*/
LIST_FOREACH(cpcb, &natm_pcbs, pcblist)
if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci &&
vpi == cpcb->npcb_vpi)
break;
/*
* add & something already there?
*/
if (cpcb) {
cpcb = NULL;
goto done; /* fail */
}
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
/*
* need to allocate a pcb?
*/
if (npcb == NULL) {
/* could be called from lower half */
cpcb = npcb_alloc(M_NOWAIT);
if (cpcb == NULL)
goto done; /* fail */
} else {
cpcb = npcb;
}
cpcb->npcb_ifp = ifp;
cpcb->ipaddr.s_addr = 0;
cpcb->npcb_vci = vci;
cpcb->npcb_vpi = vpi;
cpcb->npcb_flags = NPCB_CONNECTED;
LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
done:
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
return (cpcb);
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
}
#ifdef DDB
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
DB_SHOW_COMMAND(natm, db_show_natm)
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
{
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
struct natmpcb *cpcb;
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
db_printf("npcb dump:\n");
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
LIST_FOREACH(cpcb, &natm_pcbs, pcblist) {
Update natm PCB debugging code: - Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB. - Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND(). - Don't test results of malloc() under DIAGNOSTIC, let the memory allocator take care of its own invariants. MFC after: 1 month
2006-04-23 15:23:31 +00:00
db_printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, "
"flags=0x%x, inq=%d\n", cpcb->npcb_ifp->if_xname,
cpcb->npcb_vci, cpcb->npcb_vpi, cpcb->ipaddr.s_addr,
cpcb->npcb_socket, cpcb->npcb_flags, cpcb->npcb_inq);
Style(9): remove unneccesary space and blank lines, indentation, function prototypes. Use LIST_FOREACH instead of explicit loops. The indentation of functions indendet by 4 space have been left alone. 2-space indented functions have been re-indented.
2003-08-06 13:46:15 +00:00
}
import Chuck Cranor's ATM driver
1997-05-09 07:48:14 +00:00
}
#endif
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