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a268e0f245
proc_fs was used, in af_packet, without a surrounding #ifdef, although there is no hard dependency on proc_fs. That caused the initialization of the af_packet module to fail when CONFIG_PROC_FS=n. Specifically, proc_create_net() was used in af_packet.c, and when it fails, packet_net_init() returns -ENOMEM. It will always fail when the kernel is compiled without proc_fs, because, proc_create_net() for example always returns NULL. The calling order that starts in af_packet.c is as follows: packet_init() register_pernet_subsys() register_pernet_operations() __register_pernet_operations() ops_init() ops->init() (packet_net_ops.init=packet_net_init()) proc_create_net() It worked in the past because register_pernet_subsys()'s return value wasn't checked before this Commit36096f2f4f("packet: Fix error path in packet_init."). It always returned an error, but was not checked before, so everything was working even when CONFIG_PROC_FS=n. The fix here is simply to add the necessary #ifdef. This also fixes a similar error in tls_proc.c, that was found by Jakub Kicinski. Fixes:d26b698dd3("net/tls: add skeleton of MIB statistics") Fixes:36096f2f4f("packet: Fix error path in packet_init") Signed-off-by: Yonatan Linik <yonatanlinik@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2019 Netronome Systems, Inc. */
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <net/snmp.h>
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#include <net/tls.h>
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#ifdef CONFIG_PROC_FS
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static const struct snmp_mib tls_mib_list[] = {
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SNMP_MIB_ITEM("TlsCurrTxSw", LINUX_MIB_TLSCURRTXSW),
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SNMP_MIB_ITEM("TlsCurrRxSw", LINUX_MIB_TLSCURRRXSW),
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SNMP_MIB_ITEM("TlsCurrTxDevice", LINUX_MIB_TLSCURRTXDEVICE),
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SNMP_MIB_ITEM("TlsCurrRxDevice", LINUX_MIB_TLSCURRRXDEVICE),
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SNMP_MIB_ITEM("TlsTxSw", LINUX_MIB_TLSTXSW),
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SNMP_MIB_ITEM("TlsRxSw", LINUX_MIB_TLSRXSW),
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SNMP_MIB_ITEM("TlsTxDevice", LINUX_MIB_TLSTXDEVICE),
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SNMP_MIB_ITEM("TlsRxDevice", LINUX_MIB_TLSRXDEVICE),
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SNMP_MIB_ITEM("TlsDecryptError", LINUX_MIB_TLSDECRYPTERROR),
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SNMP_MIB_ITEM("TlsRxDeviceResync", LINUX_MIB_TLSRXDEVICERESYNC),
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SNMP_MIB_SENTINEL
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};
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static int tls_statistics_seq_show(struct seq_file *seq, void *v)
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{
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unsigned long buf[LINUX_MIB_TLSMAX] = {};
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struct net *net = seq->private;
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int i;
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snmp_get_cpu_field_batch(buf, tls_mib_list, net->mib.tls_statistics);
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for (i = 0; tls_mib_list[i].name; i++)
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seq_printf(seq, "%-32s\t%lu\n", tls_mib_list[i].name, buf[i]);
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return 0;
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}
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#endif
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int __net_init tls_proc_init(struct net *net)
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{
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#ifdef CONFIG_PROC_FS
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if (!proc_create_net_single("tls_stat", 0444, net->proc_net,
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tls_statistics_seq_show, NULL))
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return -ENOMEM;
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#endif /* CONFIG_PROC_FS */
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return 0;
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}
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void __net_exit tls_proc_fini(struct net *net)
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{
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remove_proc_entry("tls_stat", net->proc_net);
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}
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