minix/servers/inet/mnx_eth.c
David van Moolenbroek c51cd5fe91 Server/driver protocols: no longer allow third-party copies.
Before safecopies, the IO_ENDPT and DL_ENDPT message fields were needed
to know which actual process to copy data from/to, as that process may
not always be the caller. Now that we have full safecopy support, these
fields have become useless for that purpose: the owner of the grant is
*always* the caller. Allowing the caller to supply another endpoint is
in fact dangerous, because the callee may then end up using a grant
from a third party. One could call this a variant of the confused
deputy problem.

From now on, safecopy calls should always use the caller's endpoint as
grant owner. This fully obsoletes the DL_ENDPT field in the
inet/ethernet protocol. IO_ENDPT has other uses besides identifying the
grant owner though. This patch renames IO_ENDPT to USER_ENDPT, not only
because that is a more fitting name (it should never be used for I/O
after all), but also in order to intentionally break any old system
source code outside the base system. If this patch breaks your code,
fixing it is fairly simple:

- DL_ENDPT should be replaced with m_source;
- IO_ENDPT should be replaced with m_source when used for safecopies;
- IO_ENDPT should be replaced with USER_ENDPT for any other use, e.g.
  when setting REP_ENDPT, matching requests in CANCEL calls, getting
  DEV_SELECT flags, and retrieving of the real user process's endpoint
  in DEV_OPEN.

The changes in this patch are binary backward compatible.
2011-04-11 17:35:05 +00:00

839 lines
19 KiB
C

/*
inet/mnx_eth.c
Created: Jan 2, 1992 by Philip Homburg
Copyright 1995 Philip Homburg
*/
#include "inet.h"
#include <minix/safecopies.h>
#include "proto.h"
#include "osdep_eth.h"
#include "generic/type.h"
#include "generic/assert.h"
#include "generic/buf.h"
#include "generic/clock.h"
#include "generic/eth.h"
#include "generic/eth_int.h"
#include "generic/sr.h"
THIS_FILE
FORWARD _PROTOTYPE( void setup_read, (eth_port_t *eth_port) );
FORWARD _PROTOTYPE( void read_int, (eth_port_t *eth_port, int count) );
FORWARD _PROTOTYPE( void eth_issue_send, (eth_port_t *eth_port) );
FORWARD _PROTOTYPE( void write_int, (eth_port_t *eth_port) );
FORWARD _PROTOTYPE( void eth_restart, (eth_port_t *eth_port,
endpoint_t endpoint) );
FORWARD _PROTOTYPE( void send_getstat, (eth_port_t *eth_port) );
PUBLIC void osdep_eth_init()
{
int i, j, rport;
struct eth_conf *ecp;
eth_port_t *eth_port, *rep;
cp_grant_id_t gid;
/* First initialize normal ethernet interfaces */
for (i= 0, ecp= eth_conf, eth_port= eth_port_table;
i<eth_conf_nr; i++, ecp++, eth_port++)
{
/* Set all grants to invalid */
for (j= 0; j<IOVEC_NR; j++)
eth_port->etp_osdep.etp_wr_iovec[j].iov_grant= -1;
eth_port->etp_osdep.etp_wr_vec_grant= -1;
for (j= 0; j<RD_IOVEC; j++)
eth_port->etp_osdep.etp_rd_iovec[j].iov_grant= -1;
eth_port->etp_osdep.etp_rd_vec_grant= -1;
eth_port->etp_osdep.etp_state= OEPS_INIT;
eth_port->etp_osdep.etp_flags= OEPF_EMPTY;
eth_port->etp_osdep.etp_stat_gid= -1;
eth_port->etp_osdep.etp_stat_buf= NULL;
if (eth_is_vlan(ecp))
continue;
/* Allocate grants */
for (j= 0; j<IOVEC_NR; j++)
{
if (cpf_getgrants(&gid, 1) != 1)
{
ip_panic((
"osdep_eth_init: cpf_getgrants failed: %d\n",
errno));
}
eth_port->etp_osdep.etp_wr_iovec[j].iov_grant= gid;
}
if (cpf_getgrants(&gid, 1) != 1)
{
ip_panic((
"osdep_eth_init: cpf_getgrants failed: %d\n",
errno));
}
eth_port->etp_osdep.etp_wr_vec_grant= gid;
for (j= 0; j<RD_IOVEC; j++)
{
if (cpf_getgrants(&gid, 1) != 1)
{
ip_panic((
"osdep_eth_init: cpf_getgrants failed: %d\n",
errno));
}
eth_port->etp_osdep.etp_rd_iovec[j].iov_grant= gid;
}
if (cpf_getgrants(&gid, 1) != 1)
{
ip_panic((
"osdep_eth_init: cpf_getgrants failed: %d\n",
errno));
}
eth_port->etp_osdep.etp_rd_vec_grant= gid;
eth_port->etp_osdep.etp_task= NONE;
eth_port->etp_osdep.etp_recvconf= 0;
ev_init(&eth_port->etp_osdep.etp_recvev);
sr_add_minor(if2minor(ecp->ec_ifno, ETH_DEV_OFF),
i, eth_open, eth_close, eth_read,
eth_write, eth_ioctl, eth_cancel, eth_select);
eth_port->etp_flags |= EPF_ENABLED;
eth_port->etp_vlan= 0;
eth_port->etp_vlan_port= NULL;
eth_port->etp_wr_pack= 0;
eth_port->etp_rd_pack= 0;
}
/* And now come the VLANs */
for (i= 0, ecp= eth_conf, eth_port= eth_port_table;
i<eth_conf_nr; i++, ecp++, eth_port++)
{
if (!eth_is_vlan(ecp))
continue;
eth_port->etp_osdep.etp_task= NONE;
ev_init(&eth_port->etp_osdep.etp_recvev);
rport= ecp->ec_port;
assert(rport >= 0 && rport < eth_conf_nr);
rep= &eth_port_table[rport];
if (!(rep->etp_flags & EPF_ENABLED))
{
printf(
"eth%d: underlying ethernet device %d not enabled",
i, rport);
continue;
}
if (rep->etp_vlan != 0)
{
printf(
"eth%d: underlying ethernet device %d is a VLAN",
i, rport);
continue;
}
if (rep->etp_flags & EPF_GOT_ADDR)
{
eth_port->etp_ethaddr= rep->etp_ethaddr;
printf("osdep_eth_init: setting EPF_GOT_ADDR\n");
eth_port->etp_flags |= EPF_GOT_ADDR;
}
sr_add_minor(if2minor(ecp->ec_ifno, ETH_DEV_OFF),
i, eth_open, eth_close, eth_read,
eth_write, eth_ioctl, eth_cancel, eth_select);
eth_port->etp_flags |= EPF_ENABLED;
eth_port->etp_vlan= ecp->ec_vlan;
eth_port->etp_vlan_port= rep;
assert(eth_port->etp_vlan != 0);
eth_port->etp_wr_pack= 0;
eth_port->etp_rd_pack= 0;
eth_reg_vlan(rep, eth_port);
}
}
PUBLIC void eth_write_port(eth_port, pack)
eth_port_t *eth_port;
acc_t *pack;
{
assert(!no_ethWritePort);
assert(!eth_port->etp_vlan);
assert(eth_port->etp_wr_pack == NULL);
eth_port->etp_wr_pack= pack;
if (eth_port->etp_osdep.etp_state != OEPS_IDLE)
{
eth_port->etp_osdep.etp_flags |= OEPF_NEED_SEND;
return;
}
eth_issue_send(eth_port);
}
PUBLIC void eth_rec(message *m)
{
int i, r, m_type, flags;
eth_port_t *loc_port, *vlan_port;
m_type= m->m_type;
assert(m_type == DL_CONF_REPLY || m_type == DL_TASK_REPLY ||
m_type == DL_STAT_REPLY);
for (i=0, loc_port= eth_port_table; i<eth_conf_nr; i++, loc_port++)
{
if (loc_port->etp_osdep.etp_task == m->m_source)
break;
}
if (i >= eth_conf_nr)
{
printf("eth_rec: message 0x%x from unknown driver %d\n",
m_type, m->m_source);
return;
}
if (loc_port->etp_osdep.etp_state == OEPS_CONF_SENT)
{
if (m_type == DL_TASK_REPLY)
{
flags= m->DL_FLAGS;
if (flags & DL_PACK_SEND)
write_int(loc_port);
if (flags & DL_PACK_RECV)
read_int(loc_port, m->DL_COUNT);
return;
}
if (m_type != DL_CONF_REPLY)
{
printf(
"eth_rec: got bad message type 0x%x from %d in CONF state\n",
m_type, m->m_source);
return;
}
r= m->DL_STAT;
if (r < 0)
{
ip_warning(("eth_rec: DL_CONF returned error %d\n",
r));
/* Just leave it in limbo. Nothing more we can do. */
return;
}
loc_port->etp_osdep.etp_flags &= ~OEPF_NEED_CONF;
loc_port->etp_osdep.etp_state= OEPS_IDLE;
loc_port->etp_flags |= EPF_ENABLED;
loc_port->etp_ethaddr= *(ether_addr_t *)m->DL_HWADDR;
if (!(loc_port->etp_flags & EPF_GOT_ADDR))
{
loc_port->etp_flags |= EPF_GOT_ADDR;
#if 0
printf("eth_rec: calling eth_restart_ioctl\n");
#endif
eth_restart_ioctl(loc_port);
/* Also update any VLANs on this device */
for (i=0, vlan_port= eth_port_table; i<eth_conf_nr;
i++, vlan_port++)
{
if (!(vlan_port->etp_flags & EPF_ENABLED))
continue;
if (vlan_port->etp_vlan_port != loc_port)
continue;
vlan_port->etp_ethaddr= loc_port->etp_ethaddr;
vlan_port->etp_flags |= EPF_GOT_ADDR;
eth_restart_ioctl(vlan_port);
}
}
if (!(loc_port->etp_flags & EPF_READ_IP))
setup_read (loc_port);
#if 0
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_SEND)
{
printf("eth_rec(conf): OEPF_NEED_SEND is set\n");
}
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_RECV)
{
printf("eth_rec(conf): OEPF_NEED_RECV is set\n");
}
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_STAT)
{
printf("eth_rec(conf): OEPF_NEED_STAT is set\n");
}
#endif
return;
}
if (loc_port->etp_osdep.etp_state == OEPS_GETSTAT_SENT)
{
if (m_type != DL_STAT_REPLY)
{
printf(
"eth_rec: got bad message type 0x%x from %d in GETSTAT state\n",
m_type, m->m_source);
return;
}
loc_port->etp_osdep.etp_state= OEPS_IDLE;
loc_port->etp_osdep.etp_flags &= ~OEPF_NEED_STAT;
assert(loc_port->etp_osdep.etp_stat_gid != -1);
cpf_revoke(loc_port->etp_osdep.etp_stat_gid);
loc_port->etp_osdep.etp_stat_gid= -1;
loc_port->etp_osdep.etp_stat_buf= NULL;
/* Finish ioctl */
assert(loc_port->etp_flags & EPF_GOT_ADDR);
eth_restart_ioctl(loc_port);
#if 0
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_SEND)
{
printf("eth_rec(stat): OEPF_NEED_SEND is set\n");
}
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_RECV)
{
printf("eth_rec(stat): OEPF_NEED_RECV is set\n");
}
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_CONF)
{
printf("eth_rec(stat): OEPF_NEED_CONF is set\n");
}
#endif
#if 0
if (loc_port->etp_osdep.etp_state == OEPS_IDLE &&
(loc_port->etp_osdep.etp_flags & OEPF_NEED_CONF))
{
eth_set_rec_conf(loc_port,
loc_port->etp_osdep.etp_recvconf);
}
#endif
return;
}
assert(loc_port->etp_osdep.etp_state == OEPS_IDLE ||
loc_port->etp_osdep.etp_state == OEPS_RECV_SENT ||
loc_port->etp_osdep.etp_state == OEPS_SEND_SENT ||
(printf("etp_state = %d\n", loc_port->etp_osdep.etp_state), 0));
loc_port->etp_osdep.etp_state= OEPS_IDLE;
flags= m->DL_FLAGS;
if (flags & DL_PACK_SEND)
write_int(loc_port);
if (flags & DL_PACK_RECV)
read_int(loc_port, m->DL_COUNT);
if (loc_port->etp_osdep.etp_state == OEPS_IDLE &&
loc_port->etp_osdep.etp_flags & OEPF_NEED_SEND)
{
loc_port->etp_osdep.etp_flags &= ~OEPF_NEED_SEND;
if (loc_port->etp_wr_pack)
eth_issue_send(loc_port);
}
if (loc_port->etp_osdep.etp_state == OEPS_IDLE &&
(loc_port->etp_osdep.etp_flags & OEPF_NEED_RECV))
{
loc_port->etp_osdep.etp_flags &= ~OEPF_NEED_RECV;
if (!(loc_port->etp_flags & EPF_READ_IP))
setup_read (loc_port);
}
if (loc_port->etp_osdep.etp_flags & OEPF_NEED_CONF)
{
#if 0
printf("eth_rec: OEPF_NEED_CONF is set\n");
#endif
}
if (loc_port->etp_osdep.etp_state == OEPS_IDLE &&
(loc_port->etp_osdep.etp_flags & OEPF_NEED_STAT))
{
send_getstat(loc_port);
}
}
PUBLIC void eth_check_driver(char *label, endpoint_t endpoint)
{
int i;
eth_port_t *loc_port;
struct eth_conf *ecp;
/* Re-init ethernet interface */
for (i= 0, ecp= eth_conf, loc_port= eth_port_table;
i<eth_conf_nr; i++, ecp++, loc_port++)
{
if (eth_is_vlan(ecp))
continue;
if (strcmp(ecp->ec_label, label) != 0)
{
/* Wrong driver */
continue;
}
eth_restart(loc_port, endpoint);
}
}
PUBLIC int eth_get_stat(eth_port, eth_stat)
eth_port_t *eth_port;
eth_stat_t *eth_stat;
{
cp_grant_id_t gid;
assert(!eth_port->etp_vlan);
if (eth_port->etp_osdep.etp_flags & OEPF_NEED_STAT)
ip_panic(( "eth_get_stat: getstat already in progress" ));
gid= cpf_grant_direct(eth_port->etp_osdep.etp_task,
(vir_bytes)eth_stat, sizeof(*eth_stat), CPF_WRITE);
if (gid == -1)
{
ip_panic(( "eth_get_stat: cpf_grant_direct failed: %d\n",
errno));
}
assert(eth_port->etp_osdep.etp_stat_gid == -1);
eth_port->etp_osdep.etp_stat_gid= gid;
eth_port->etp_osdep.etp_stat_buf= eth_stat;
if (eth_port->etp_osdep.etp_state != OEPS_IDLE)
{
eth_port->etp_osdep.etp_flags |= OEPF_NEED_STAT;
return SUSPEND;
}
send_getstat(eth_port);
return SUSPEND;
}
PUBLIC void eth_set_rec_conf (eth_port, flags)
eth_port_t *eth_port;
u32_t flags;
{
int r;
unsigned dl_flags, mask;
message mess;
assert(!eth_port->etp_vlan);
if (!(eth_port->etp_flags & EPF_GOT_ADDR))
{
/* We have never seen the device. */
#if 0
printf("eth_set_rec_conf: waiting for device to appear\n");
#endif
return;
}
if (eth_port->etp_osdep.etp_state != OEPS_IDLE)
{
#if 0
printf(
"eth_set_rec_conf: setting OEPF_NEED_CONF, state = %d\n",
eth_port->etp_osdep.etp_state);
#endif
eth_port->etp_osdep.etp_flags |= OEPF_NEED_CONF;
return;
}
mask = NWEO_EN_BROAD | NWEO_EN_MULTI | NWEO_EN_PROMISC;
if ((eth_port->etp_osdep.etp_recvconf & mask) == (flags & mask))
{
/* No change for the driver, so don't send an update */
return;
}
eth_port->etp_osdep.etp_recvconf= flags;
dl_flags= DL_NOMODE;
if (flags & NWEO_EN_BROAD)
dl_flags |= DL_BROAD_REQ;
if (flags & NWEO_EN_MULTI)
dl_flags |= DL_MULTI_REQ;
if (flags & NWEO_EN_PROMISC)
dl_flags |= DL_PROMISC_REQ;
mess.m_type= DL_CONF;
mess.DL_MODE= dl_flags;
assert(eth_port->etp_osdep.etp_state == OEPS_IDLE);
r= asynsend(eth_port->etp_osdep.etp_task, &mess);
eth_port->etp_osdep.etp_state= OEPS_CONF_SENT;
if (r < 0)
{
printf("eth_set_rec_conf: asynsend to %d failed: %d\n",
eth_port->etp_osdep.etp_task, r);
return;
}
}
PRIVATE void eth_issue_send(eth_port)
eth_port_t *eth_port;
{
int i, r, pack_size;
acc_t *pack, *pack_ptr;
iovec_s_t *iovec;
message m;
iovec= eth_port->etp_osdep.etp_wr_iovec;
pack= eth_port->etp_wr_pack;
pack_size= 0;
for (i=0, pack_ptr= pack; i<IOVEC_NR && pack_ptr; i++,
pack_ptr= pack_ptr->acc_next)
{
r= cpf_setgrant_direct(iovec[i].iov_grant,
eth_port->etp_osdep.etp_task,
(vir_bytes)ptr2acc_data(pack_ptr),
(vir_bytes)pack_ptr->acc_length,
CPF_READ);
if (r != 0)
{
ip_panic((
"eth_write_port: cpf_setgrant_direct failed: %d\n",
errno));
}
pack_size += iovec[i].iov_size= pack_ptr->acc_length;
}
if (i>= IOVEC_NR)
{
pack= bf_pack(pack); /* packet is too fragmented */
eth_port->etp_wr_pack= pack;
pack_size= 0;
for (i=0, pack_ptr= pack; i<IOVEC_NR && pack_ptr;
i++, pack_ptr= pack_ptr->acc_next)
{
r= cpf_setgrant_direct(iovec[i].iov_grant,
eth_port->etp_osdep.etp_task,
(vir_bytes)ptr2acc_data(pack_ptr),
(vir_bytes)pack_ptr->acc_length,
CPF_READ);
if (r != 0)
{
ip_panic((
"eth_write_port: cpf_setgrant_direct failed: %d\n",
errno));
}
pack_size += iovec[i].iov_size= pack_ptr->acc_length;
}
}
assert (i< IOVEC_NR);
assert (pack_size >= ETH_MIN_PACK_SIZE);
r= cpf_setgrant_direct(eth_port->etp_osdep.etp_wr_vec_grant,
eth_port->etp_osdep.etp_task,
(vir_bytes)iovec,
(vir_bytes)(i * sizeof(iovec[0])),
CPF_READ);
if (r != 0)
{
ip_panic((
"eth_write_port: cpf_setgrant_direct failed: %d\n",
errno));
}
m.m_type= DL_WRITEV_S;
m.DL_ENDPT_LEGACY= this_proc; /* FIXME: legacy support */
m.DL_COUNT= i;
m.DL_GRANT= eth_port->etp_osdep.etp_wr_vec_grant;
assert(eth_port->etp_osdep.etp_state == OEPS_IDLE);
r= asynsend(eth_port->etp_osdep.etp_task, &m);
if (r < 0)
{
printf("eth_issue_send: send to %d failed: %d\n",
eth_port->etp_osdep.etp_task, r);
return;
}
eth_port->etp_osdep.etp_state= OEPS_SEND_SENT;
}
PRIVATE void write_int(eth_port_t *eth_port)
{
acc_t *pack;
int multicast;
u8_t *eth_dst_ptr;
pack= eth_port->etp_wr_pack;
if (pack == NULL)
{
printf("write_int: strange no packet on eth port %d\n",
(int)(eth_port-eth_port_table));
eth_restart_write(eth_port);
return;
}
eth_port->etp_wr_pack= NULL;
eth_dst_ptr= (u8_t *)ptr2acc_data(pack);
multicast= (*eth_dst_ptr & 1); /* low order bit indicates multicast */
if (multicast || (eth_port->etp_osdep.etp_recvconf & NWEO_EN_PROMISC))
{
assert(!no_ethWritePort);
no_ethWritePort= 1;
eth_arrive(eth_port, pack, bf_bufsize(pack));
assert(no_ethWritePort);
no_ethWritePort= 0;
}
else
bf_afree(pack);
eth_restart_write(eth_port);
}
PRIVATE void read_int(eth_port, count)
eth_port_t *eth_port;
int count;
{
acc_t *pack, *pack_ptr, *cut_pack;
iovec_s_t *iovec;
int i, r;
/* A buggy driver might try to feed us a reply for a request we never
* sent. Don't let this cause a crash further up.
*/
if (!(eth_port->etp_flags & EPF_READ_IP))
{
printf("mnx_eth`read_int: read reply with no read going on\n");
return;
}
pack= eth_port->etp_rd_pack;
eth_port->etp_rd_pack= NULL;
/* Invalidate the grants first, so that the ethernet driver can no
* longer modify the contents of the packet.
*/
iovec= eth_port->etp_osdep.etp_rd_iovec;
for (i=0, pack_ptr= pack; i<RD_IOVEC && pack_ptr;
i++, pack_ptr= pack_ptr->acc_next)
{
r= cpf_setgrant_disable(iovec[i].iov_grant);
if (r != 0)
{
ip_panic((
"mnx_eth`read_int: cpf_setgrant_disable failed: %d\n",
errno));
}
}
if (count < ETH_MIN_PACK_SIZE)
{
printf("mnx_eth`read_int: packet size too small (%d)\n",
count);
bf_afree(pack);
}
else if (count > ETH_MAX_PACK_SIZE_TAGGED)
{
printf("mnx_eth`read_int: packet size too big (%d)\n",
count);
bf_afree(pack);
}
else
{
cut_pack= bf_cut(pack, 0, count);
bf_afree(pack);
assert(!no_ethWritePort);
no_ethWritePort= 1;
eth_arrive(eth_port, cut_pack, count);
assert(no_ethWritePort);
no_ethWritePort= 0;
}
eth_port->etp_flags &= ~(EPF_READ_IP|EPF_READ_SP);
setup_read(eth_port);
}
PRIVATE void setup_read(eth_port)
eth_port_t *eth_port;
{
acc_t *pack, *pack_ptr;
message mess;
iovec_s_t *iovec;
int i, r;
assert(!eth_port->etp_vlan);
assert(!(eth_port->etp_flags & (EPF_READ_IP|EPF_READ_SP)));
if (eth_port->etp_osdep.etp_state != OEPS_IDLE)
{
eth_port->etp_osdep.etp_flags |= OEPF_NEED_RECV;
return;
}
assert (!eth_port->etp_rd_pack);
iovec= eth_port->etp_osdep.etp_rd_iovec;
pack= bf_memreq (ETH_MAX_PACK_SIZE_TAGGED);
for (i=0, pack_ptr= pack; i<RD_IOVEC && pack_ptr;
i++, pack_ptr= pack_ptr->acc_next)
{
r= cpf_setgrant_direct(iovec[i].iov_grant,
eth_port->etp_osdep.etp_task,
(vir_bytes)ptr2acc_data(pack_ptr),
(vir_bytes)pack_ptr->acc_length,
CPF_WRITE);
if (r != 0)
{
ip_panic((
"mnx_eth`setup_read: cpf_setgrant_direct failed: %d\n",
errno));
}
iovec[i].iov_size= (vir_bytes)pack_ptr->acc_length;
}
assert (!pack_ptr);
r= cpf_setgrant_direct(eth_port->etp_osdep.etp_rd_vec_grant,
eth_port->etp_osdep.etp_task,
(vir_bytes)iovec,
(vir_bytes)(i * sizeof(iovec[0])),
CPF_READ);
if (r != 0)
{
ip_panic((
"mnx_eth`setup_read: cpf_setgrant_direct failed: %d\n",
errno));
}
mess.m_type= DL_READV_S;
mess.DL_ENDPT_LEGACY= this_proc; /* FIXME: legacy support */
mess.DL_COUNT= i;
mess.DL_GRANT= eth_port->etp_osdep.etp_rd_vec_grant;
assert(eth_port->etp_osdep.etp_state == OEPS_IDLE);
r= asynsend(eth_port->etp_osdep.etp_task, &mess);
eth_port->etp_osdep.etp_state= OEPS_RECV_SENT;
if (r < 0)
{
printf(
"mnx_eth`setup_read: asynsend to %d failed: %d\n",
eth_port->etp_osdep.etp_task, r);
}
eth_port->etp_rd_pack= pack;
eth_port->etp_flags |= EPF_READ_IP;
eth_port->etp_flags |= EPF_READ_SP;
}
static void eth_restart(eth_port_t *eth_port, endpoint_t endpoint)
{
int r;
unsigned flags, dl_flags;
cp_grant_id_t gid;
message mess;
eth_port->etp_osdep.etp_task= endpoint;
switch(eth_port->etp_osdep.etp_state)
{
case OEPS_INIT:
case OEPS_CONF_SENT:
case OEPS_RECV_SENT:
case OEPS_SEND_SENT:
/* We can safely ignore the pending CONF, RECV, and SEND
* requests. If this is the first time that we see this
* driver at all, that's fine too.
*/
eth_port->etp_osdep.etp_state= OEPS_IDLE;
break;
case OEPS_GETSTAT_SENT:
/* Set the OEPF_NEED_STAT to trigger a new request */
eth_port->etp_osdep.etp_flags |= OEPF_NEED_STAT;
eth_port->etp_osdep.etp_state= OEPS_IDLE;
break;
}
/* If there is a pending GETSTAT request then we have to create a
* new grant.
*/
if (eth_port->etp_osdep.etp_flags & OEPF_NEED_STAT)
{
assert(eth_port->etp_osdep.etp_stat_gid != -1);
cpf_revoke(eth_port->etp_osdep.etp_stat_gid);
gid= cpf_grant_direct(eth_port->etp_osdep.etp_task,
(vir_bytes)eth_port->etp_osdep.etp_stat_buf,
sizeof(*eth_port->etp_osdep.etp_stat_buf), CPF_WRITE);
if (gid == -1)
{
ip_panic((
"eth_restart: cpf_grant_direct failed: %d\n",
errno));
}
eth_port->etp_osdep.etp_stat_gid= gid;
}
flags= eth_port->etp_osdep.etp_recvconf;
dl_flags= DL_NOMODE;
if (flags & NWEO_EN_BROAD)
dl_flags |= DL_BROAD_REQ;
if (flags & NWEO_EN_MULTI)
dl_flags |= DL_MULTI_REQ;
if (flags & NWEO_EN_PROMISC)
dl_flags |= DL_PROMISC_REQ;
mess.m_type= DL_CONF;
mess.DL_MODE= dl_flags;
compare(eth_port->etp_osdep.etp_state, ==, OEPS_IDLE);
r= asynsend(eth_port->etp_osdep.etp_task, &mess);
if (r<0)
{
printf(
"eth_restart: send to ethernet task %d failed: %d\n",
eth_port->etp_osdep.etp_task, r);
return;
}
eth_port->etp_osdep.etp_state= OEPS_CONF_SENT;
if (eth_port->etp_wr_pack)
{
bf_afree(eth_port->etp_wr_pack);
eth_port->etp_wr_pack= NULL;
eth_restart_write(eth_port);
}
if (eth_port->etp_rd_pack)
{
bf_afree(eth_port->etp_rd_pack);
eth_port->etp_rd_pack= NULL;
eth_port->etp_flags &= ~(EPF_READ_IP|EPF_READ_SP);
}
}
PRIVATE void send_getstat(eth_port)
eth_port_t *eth_port;
{
int r;
message mess;
mess.m_type= DL_GETSTAT_S;
mess.DL_ENDPT_LEGACY= this_proc; /* FIXME: legacy support */
mess.DL_GRANT= eth_port->etp_osdep.etp_stat_gid;
assert(eth_port->etp_osdep.etp_state == OEPS_IDLE);
r= asynsend(eth_port->etp_osdep.etp_task, &mess);
eth_port->etp_osdep.etp_state= OEPS_GETSTAT_SENT;
if (r != OK)
ip_panic(( "eth_get_stat: asynsend failed: %d", r));
}
/*
* $PchId: mnx_eth.c,v 1.16 2005/06/28 14:24:37 philip Exp $
*/