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Revert "linsysfs(4): Reimplement listnics() using ifAPI"

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This reverts commit 0b56641cfc.

As it poorly interacts with vnet subsystem
This commit is contained in:
Dmitry Chagin 2023-03-31 14:54:33 +03:00
parent 28921c4f7d
commit f94b5734bc
4 changed files with 179 additions and 373 deletions
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186
sys/compat/linsysfs/linsysfs.c
View File

@ -37,19 +37,22 @@ __FBSDID("$FreeBSD$");
#include <sys/mount.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <sys/pciio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <compat/linux/linux.h>
#include <compat/linux/linux_common.h>
#include <compat/linux/linux_util.h>
#include <fs/pseudofs/pseudofs.h>
#include <compat/linsysfs/linsysfs.h>
MALLOC_DEFINE(M_LINSYSFS, "linsysfs", "Linsysfs structures");
struct scsi_host_queue {
TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
char *path;
@ -66,6 +69,175 @@ atoi(const char *str)
return (int)strtol(str, (char **)NULL, 10);
}
static int
linsysfs_ifnet_addr(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct l_sockaddr lsa;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL && (error = linux_ifhwaddr(ifp, &lsa)) == 0)
error = sbuf_printf(sb, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx\n",
lsa.sa_data[0], lsa.sa_data[1], lsa.sa_data[2],
lsa.sa_data[3], lsa.sa_data[4], lsa.sa_data[5]);
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_addrlen(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%d\n", LINUX_IFHWADDRLEN);
return (0);
}
static int
linsysfs_ifnet_flags(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "0x%x\n", linux_ifflags(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_ifindex(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "%u\n", if_getindex(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_mtu(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "%u\n", if_getmtu(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_tx_queue_len(PFS_FILL_ARGS)
{
/* XXX */
sbuf_printf(sb, "1000\n");
return (0);
}
static int
linsysfs_ifnet_type(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct l_sockaddr lsa;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL && (error = linux_ifhwaddr(ifp, &lsa)) == 0)
error = sbuf_printf(sb, "%d\n", lsa.sa_family);
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static void
linsysfs_listnics(struct pfs_node *dir)
{
struct pfs_node *nic;
struct pfs_node *lo;
nic = pfs_create_dir(dir, "eth0", NULL, NULL, NULL, 0);
pfs_create_file(nic, "address", &linsysfs_ifnet_addr,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "addr_len", &linsysfs_ifnet_addrlen,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "flags", &linsysfs_ifnet_flags,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "ifindex", &linsysfs_ifnet_ifindex,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "mtu", &linsysfs_ifnet_mtu,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "tx_queue_len", &linsysfs_ifnet_tx_queue_len,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "type", &linsysfs_ifnet_type,
NULL, NULL, NULL, PFS_RD);
lo = pfs_create_dir(dir, "lo", NULL, NULL, NULL, 0);
pfs_create_file(lo, "address", &linsysfs_ifnet_addr,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "addr_len", &linsysfs_ifnet_addrlen,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "flags", &linsysfs_ifnet_flags,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "ifindex", &linsysfs_ifnet_ifindex,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "mtu", &linsysfs_ifnet_mtu,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "tx_queue_len", &linsysfs_ifnet_tx_queue_len,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "type", &linsysfs_ifnet_type,
NULL, NULL, NULL, PFS_RD);
}
/*
* Filler function for proc_name
*/
@ -478,6 +650,7 @@ linsysfs_init(PFS_INIT_ARGS)
struct pfs_node *drm;
struct pfs_node *pci;
struct pfs_node *scsi;
struct pfs_node *net;
struct pfs_node *devdir, *chardev;
struct pfs_node *kernel;
devclass_t devclass;
@ -529,14 +702,13 @@ linsysfs_init(PFS_INIT_ARGS)
NULL, NULL, NULL, PFS_RD);
linsysfs_listcpus(cpu);
linsysfs_listnics(net);
/* /sys/kernel */
kernel = pfs_create_dir(root, "kernel", NULL, NULL, NULL, 0);
/* /sys/kernel/debug, mountpoint for lindebugfs. */
pfs_create_dir(kernel, "debug", NULL, NULL, NULL, 0);
linsysfs_net_init();
return (0);
}
@ -555,8 +727,6 @@ linsysfs_uninit(PFS_INIT_ARGS)
free(scsi_host, M_TEMP);
}
linsysfs_net_uninit();
return (0);
}

38
sys/compat/linsysfs/linsysfs.h
View File

@ -1,38 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#ifndef _COMPAT_LINSYSFS_LINSYSFS_H_
#define _COMPAT_LINSYSFS_LINSYSFS_H_
MALLOC_DECLARE(M_LINSYSFS);
extern struct pfs_node *net;
void linsysfs_net_init(void);
void linsysfs_net_uninit(void);
#endif /* _COMPAT_LINSYSFS_LINSYSFS_H_ */

326
sys/compat/linsysfs/linsysfs_net.c
View File

@ -1,326 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <compat/linux/linux.h>
#include <compat/linux/linux_common.h>
#include <fs/pseudofs/pseudofs.h>
#include <compat/linsysfs/linsysfs.h>
struct pfs_node *net;
static eventhandler_tag if_arrival_tag, if_departure_tag;
static uint32_t net_latch_count = 0;
static struct mtx net_latch_mtx;
MTX_SYSINIT(net_latch_mtx, &net_latch_mtx, "lsfnet", MTX_DEF);
struct ifp_nodes_queue {
TAILQ_ENTRY(ifp_nodes_queue) ifp_nodes_next;
if_t ifp;
struct pfs_node *pn;
};
TAILQ_HEAD(,ifp_nodes_queue) ifp_nodes_q;
static void
linsysfs_net_latch_hold(void)
{
mtx_lock(&net_latch_mtx);
if (net_latch_count++ > 0)
mtx_sleep(&net_latch_count, &net_latch_mtx, PDROP, "lsfnet", 0);
else
mtx_unlock(&net_latch_mtx);
}
static void
linsysfs_net_latch_rele(void)
{
mtx_lock(&net_latch_mtx);
if (--net_latch_count > 0)
wakeup_one(&net_latch_count);
mtx_unlock(&net_latch_mtx);
}
static int
linsysfs_ifnet_addr(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct l_sockaddr lsa;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL && (error = linux_ifhwaddr(ifp, &lsa)) == 0)
error = sbuf_printf(sb, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx\n",
lsa.sa_data[0], lsa.sa_data[1], lsa.sa_data[2],
lsa.sa_data[3], lsa.sa_data[4], lsa.sa_data[5]);
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_addrlen(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%d\n", LINUX_IFHWADDRLEN);
return (0);
}
static int
linsysfs_ifnet_flags(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "0x%x\n", linux_ifflags(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_ifindex(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "%u\n", if_getindex(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_mtu(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL)
error = sbuf_printf(sb, "%u\n", if_getmtu(ifp));
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static int
linsysfs_ifnet_tx_queue_len(PFS_FILL_ARGS)
{
/* XXX */
sbuf_printf(sb, "1000\n");
return (0);
}
static int
linsysfs_ifnet_type(PFS_FILL_ARGS)
{
struct epoch_tracker et;
struct l_sockaddr lsa;
struct ifnet *ifp;
int error;
CURVNET_SET(TD_TO_VNET(td));
NET_EPOCH_ENTER(et);
ifp = ifname_linux_to_ifp(td, pn->pn_parent->pn_name);
if (ifp != NULL && (error = linux_ifhwaddr(ifp, &lsa)) == 0)
error = sbuf_printf(sb, "%d\n", lsa.sa_family);
else
error = ENOENT;
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (error == -1 ? ERANGE : error);
}
static struct pfs_node *
linsysfs_net_find_node(if_t ifp)
{
struct ifp_nodes_queue *nq, *nq_tmp;
TAILQ_FOREACH_SAFE(nq, &ifp_nodes_q, ifp_nodes_next, nq_tmp) {
if (nq->ifp == ifp)
return (nq->pn);
}
return (NULL);
}
static int
linsysfs_net_addnic(if_t ifp, void *arg)
{
char ifname[LINUX_IFNAMSIZ];
struct ifp_nodes_queue *nq;
struct epoch_tracker et;
struct pfs_node *dir = arg;
struct pfs_node *nic = NULL;
int ret __diagused;
NET_EPOCH_ENTER(et);
ret = ifname_bsd_to_linux_ifp(ifp, ifname, sizeof(ifname));
NET_EPOCH_EXIT(et);
KASSERT(ret > 0, ("Interface (%s) is not converted", if_name(ifp)));
nic = linsysfs_net_find_node(ifp);
MPASS(nic == NULL);
nic = pfs_create_dir(dir, ifname, NULL, NULL, NULL, 0);
pfs_create_file(nic, "address", &linsysfs_ifnet_addr,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "addr_len", &linsysfs_ifnet_addrlen,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "flags", &linsysfs_ifnet_flags,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "ifindex", &linsysfs_ifnet_ifindex,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "mtu", &linsysfs_ifnet_mtu,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "tx_queue_len", &linsysfs_ifnet_tx_queue_len,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "type", &linsysfs_ifnet_type,
NULL, NULL, NULL, PFS_RD);
nq = malloc(sizeof(*nq), M_LINSYSFS, M_WAITOK);
nq->pn = nic;
nq->ifp = ifp;
TAILQ_INSERT_TAIL(&ifp_nodes_q, nq, ifp_nodes_next);
return (0);
}
static int
linsysfs_net_delnic(if_t ifp, void *arg)
{
struct ifp_nodes_queue *nq, *nq_tmp;
TAILQ_FOREACH_SAFE(nq, &ifp_nodes_q, ifp_nodes_next, nq_tmp) {
if (nq->ifp == ifp) {
TAILQ_REMOVE(&ifp_nodes_q, nq, ifp_nodes_next);
pfs_destroy(nq->pn);
free(nq, M_LINSYSFS);
return (0);
}
}
return (1);
}
static void
linsysfs_net_listnics(struct pfs_node *dir)
{
CURVNET_SET(TD_TO_VNET(curthread));
if_foreach_sleep(NULL, NULL, linsysfs_net_addnic, dir);
CURVNET_RESTORE();
}
static void
linsysfs_ifnet_arrival(void *arg __unused, struct ifnet *ifp)
{
linsysfs_net_latch_hold();
linsysfs_net_addnic(ifp, net);
linsysfs_net_latch_rele();
}
static void
linsysfs_ifnet_departure(void *arg __unused, struct ifnet *ifp)
{
linsysfs_net_latch_hold();
linsysfs_net_delnic(ifp, net);
linsysfs_net_latch_rele();
}
void
linsysfs_net_init(void)
{
MPASS(net != NULL);
TAILQ_INIT(&ifp_nodes_q);
if_arrival_tag = EVENTHANDLER_REGISTER(ifnet_arrival_event,
linsysfs_ifnet_arrival, NULL, EVENTHANDLER_PRI_ANY);
if_departure_tag = EVENTHANDLER_REGISTER(ifnet_departure_event,
linsysfs_ifnet_departure, NULL, EVENTHANDLER_PRI_ANY);
linsysfs_net_latch_hold();
linsysfs_net_listnics(net);
linsysfs_net_latch_rele();
}
void
linsysfs_net_uninit(void)
{
struct ifp_nodes_queue *nq, *nq_tmp;
EVENTHANDLER_DEREGISTER(ifnet_arrival_event, if_arrival_tag);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, if_departure_tag);
linsysfs_net_latch_hold();
TAILQ_FOREACH_SAFE(nq, &ifp_nodes_q, ifp_nodes_next, nq_tmp) {
TAILQ_REMOVE(&ifp_nodes_q, nq, ifp_nodes_next);
free(nq, M_LINSYSFS);
}
linsysfs_net_latch_rele();
}

2
sys/modules/linsysfs/Makefile
View File

@ -5,7 +5,7 @@
KMOD= linsysfs
SRCS= vnode_if.h \
device_if.h bus_if.h pci_if.h \
linsysfs.c linsysfs_net.c
linsysfs.c
.if !defined(KERNBUILDDIR)
.warning Building Linuxulator outside of a kernel does not make sense