ef0c913256
These were a left over from when the private memory pools were converted to use uma zones. The limit of UMA zones, however, works differently. When a zone is limited to only one or two pages than, on multi-cpu systems, processes can get stuck on the zonelimit, because all remaining free items are in caches of other CPUs. Also add rudimentary error handling in some places (panic) when a zone cannot be created.
250 lines
4.6 KiB
C
250 lines
4.6 KiB
C
/*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*/
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/*
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* ATM Forum UNI Support
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* ---------------------
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*
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* UNI IP interface module
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netatm/port.h>
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#include <netatm/queue.h>
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#include <netatm/atm.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_cm.h>
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#include <netatm/atm_if.h>
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#include <netatm/ipatm/ipatm_var.h>
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#include <netatm/ipatm/ipatm_serv.h>
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#include <netatm/uni/uniip_var.h>
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#include <vm/uma.h>
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/*
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* Local functions
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*/
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static int uniip_ipact(struct ip_nif *);
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static int uniip_ipdact(struct ip_nif *);
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/*
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* Global variables
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*/
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struct uniip *uniip_head = NULL;
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struct ip_serv uniip_ipserv = {
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uniip_ipact,
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uniip_ipdact,
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uniarp_ioctl,
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uniarp_pvcopen,
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uniarp_svcout,
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uniarp_svcin,
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uniarp_svcactive,
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uniarp_vcclose,
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NULL,
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{ { ATM_AAL5, ATM_ENC_LLC} },
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};
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/*
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* Local variables
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*/
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static uma_zone_t uniip_zone;
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/*
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* Process module loading notification
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*
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* Called whenever the uni module is initializing.
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*
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* Arguments:
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* none
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*
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* Returns:
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* 0 initialization successful
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* errno initialization failed - reason indicated
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*
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*/
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int
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uniip_start()
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{
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int err;
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uniip_zone = uma_zcreate("uni ip", sizeof(struct uniip), NULL, NULL,
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NULL, NULL, UMA_ALIGN_PTR, 0);
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if (uniip_zone == NULL)
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panic("uniip_start: uma_zcreate");
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/*
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* Tell arp to initialize stuff
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*/
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err = uniarp_start();
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return (err);
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}
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/*
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* Process module unloading notification
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*
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* Called whenever the uni module is about to be unloaded. All signalling
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* instances will have been previously detached. All uniip resources
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* must be freed now.
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*
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* Arguments:
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* none
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*
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* Returns:
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* 0 shutdown was successful
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* errno shutdown failed - reason indicated
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*
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*/
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int
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uniip_stop()
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{
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/*
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* All IP interfaces should be gone
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*/
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if (uniip_head)
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return (EBUSY);
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/*
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* Tell arp to stop
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*/
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uniarp_stop();
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uma_zdestroy(uniip_zone);
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return (0);
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}
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/*
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* Process IP Network Interface Activation
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*
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* Called whenever an IP network interface becomes active.
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*
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* Called at splnet.
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*
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* Arguments:
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* inp pointer to IP network interface
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*
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* Returns:
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* 0 command successful
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* errno command failed - reason indicated
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*
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*/
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static int
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uniip_ipact(inp)
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struct ip_nif *inp;
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{
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struct uniip *uip;
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/*
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* Make sure we don't already have this interface
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*/
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for (uip = uniip_head; uip; uip = uip->uip_next) {
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if (uip->uip_ipnif == inp)
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return (EEXIST);
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}
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/*
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* Get a new interface control block
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*/
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uip = uma_zalloc(uniip_zone, M_WAITOK | M_ZERO);
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if (uip == NULL)
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return (ENOMEM);
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/*
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* Initialize and link up
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*/
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uip->uip_ipnif = inp;
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LINK2TAIL(uip, struct uniip, uniip_head, uip_next);
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/*
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* Link from IP world
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*/
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inp->inf_isintf = (caddr_t)uip;
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/*
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* Tell arp about new interface
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*/
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uniarp_ipact(uip);
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return (0);
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}
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/*
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* Process IP Network Interface Deactivation
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*
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* Called whenever an IP network interface becomes inactive.
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*
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* Called at splnet.
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*
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* Arguments:
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* inp pointer to IP network interface
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*
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* Returns:
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* 0 command successful
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* errno command failed - reason indicated
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*
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*/
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static int
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uniip_ipdact(inp)
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struct ip_nif *inp;
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{
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struct uniip *uip;
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/*
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* Get the appropriate IP interface block
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*/
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uip = (struct uniip *)inp->inf_isintf;
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if (uip == NULL)
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return (ENXIO);
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/*
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* Let arp know about this
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*/
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uniarp_ipdact(uip);
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/*
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* Free interface info
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*/
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UNLINK(uip, struct uniip, uniip_head, uip_next);
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if (uip->uip_prefix != NULL)
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free(uip->uip_prefix, M_DEVBUF);
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uma_zfree(uniip_zone, uip);
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return (0);
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}
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