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Adds sys/class/net devices to linsysfs.

Browse Source 
Only two interfaces are created eth0 and lo and they expose
the following properties:
address, addr_len, flags, ifindex, mty, tx_queue_len and type.

Initial patch developed by Carlos Neira in 2017 and finished by me.

PR:		223722
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D13656
This commit is contained in:
Dmitry Chagin 2019-05-06 20:01:13 +00:00
parent bbac65c772
commit 4e2f69f1cf
1 changed files with 151 additions and 0 deletions
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151
sys/compat/linsysfs/linsysfs.c
View File

@ -2,6 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 IronPort Systems
* Copyright (c) 2017 Carlos Neira cneirabustos@gmail.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -31,6 +32,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ctype.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
@ -44,7 +46,11 @@ __FBSDID("$FreeBSD$");
#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>
@ -64,6 +70,146 @@ atoi(const char *str)
return (int)strtol(str, (char **)NULL, 10);
}
static int
linsysfs_ifnet_addr(PFS_FILL_ARGS)
{
struct l_sockaddr lsa;
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
if (linux_ifhwaddr(ifp, &lsa) != 0)
return (ENOENT);
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]);
return (0);
}
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 ifnet *ifp;
unsigned short flags;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
linux_ifflags(ifp, &flags);
sbuf_printf(sb, "0x%x\n", flags);
return (0);
}
static int
linsysfs_ifnet_ifindex(PFS_FILL_ARGS)
{
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
sbuf_printf(sb, "%u\n", ifp->if_index);
return (0);
}
static int
linsysfs_ifnet_mtu(PFS_FILL_ARGS)
{
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
sbuf_printf(sb, "%u\n", ifp->if_mtu);
return (0);
}
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 l_sockaddr lsa;
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
if (linux_ifhwaddr(ifp, &lsa) != 0)
return (ENOENT);
sbuf_printf(sb, "%d\n", lsa.sa_family);
return (0);
}
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
*/
@ -475,6 +621,7 @@ 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;
devclass_t devclass;
device_t dev;
@ -488,6 +635,9 @@ linsysfs_init(PFS_INIT_ARGS)
scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0);
drm = pfs_create_dir(class, "drm", NULL, NULL, NULL, 0);
/* /sys/class/net/.. */
net = pfs_create_dir(class, "net", NULL, NULL, NULL, 0);
/* /sys/dev/... */
devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0);
chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0);
@ -518,6 +668,7 @@ linsysfs_init(PFS_INIT_ARGS)
NULL, NULL, NULL, PFS_RD);
linsysfs_listcpus(cpu);
linsysfs_listnics(net);
return (0);
}