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Merge pull request #6797 from orivej/fix-if_linux_ipv6-addrstr
Fix if_linux_ipv6 verbose output of interface addresses
2 parents 506d0b1 + 39b799d commit 29468ec

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‎opal/mca/if/linux_ipv6/Makefile.am‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,12 +1,14 @@
11
#
2-
# Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
2+
# Copyright (c) 2019 Cisco Systems, Inc. All rights reserved.
33
# $COPYRIGHT$
44
#
55
# Additional copyrights may follow
66
#
77
# $HEADER$
88
#
99

10+
dist_opaldata_DATA = help-opal-if-linux-ipv6.txt
11+
1012
noinst_LTLIBRARIES = libmca_if_linux_ipv6.la
1113

1214
libmca_if_linux_ipv6_la_SOURCES = if_linux_ipv6.c

‎opal/mca/if/linux_ipv6/help-opal-if-linux-ipv6.txt‎

Lines changed: 17 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
1+
# -*- text -*-
2+
#
3+
# Copyright (c) 2019 Cisco Systems, Inc. All rights reserved.
4+
# $COPYRIGHT$
5+
#
6+
# Additional copyrights may follow
7+
#
8+
# $HEADER$
9+
#
10+
[fail to parse if_inet6]
11+
Open MPI failed to parse at least one of the lines in
12+
/proc/net/if_inet6. This is extremely unusual and should never
13+
happen. Open MPI will skip this interface and attempt to continue.
14+
15+
Host: %s
16+
Interface: %s
17+
Hex: %s

‎opal/mca/if/linux_ipv6/if_linux_ipv6.c‎

Lines changed: 54 additions & 31 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
/*
2-
* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
2+
* Copyright (c) 2010-2019 Cisco Systems, Inc. All rights reserved.
33
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
44
* Copyright (c) 2018 Amazon.com, Inc. or its affiliates. All Rights
55
* reserved.
@@ -48,10 +48,13 @@
4848
#include "opal/constants.h"
4949
#include "opal/util/if.h"
5050
#include "opal/util/output.h"
51+
#include "opal/util/show_help.h"
5152
#include "opal/util/string_copy.h"
5253
#include "opal/mca/if/if.h"
5354
#include "opal/mca/if/base/base.h"
5455

56+
#define LOG_PREFIX "mca: if: linux_ipv6: "
57+
5558
static int if_linux_ipv6_open(void);
5659

5760
/* Discovers Linux IPv6 interfaces */
@@ -77,7 +80,36 @@ opal_if_base_component_t mca_if_linux_ipv6_component = {
7780
},
7881
};
7982

80-
/* configure using getifaddrs(3) */
83+
#if OPAL_ENABLE_IPV6
84+
static bool hex2int(char hex, int *dst)
85+
{
86+
if ('0' <= hex && hex <= '9') {
87+
*dst = hex - '0';
88+
} else if ('A' <= hex && hex <= 'F') {
89+
*dst = hex - 'A' + 10;
90+
} else if ('a' <= hex && hex <= 'f') {
91+
*dst = hex - 'a' + 10;
92+
} else {
93+
return false;
94+
}
95+
return true;
96+
97+
}
98+
99+
static bool hexdecode(const char *src, uint8_t *dst, size_t dstsize)
100+
{
101+
int hi, lo;
102+
for (size_t i = 0; i < dstsize; i++) {
103+
if (hex2int(src[i * 2], &hi) && hex2int(src[i * 2 + 1], &lo)) {
104+
dst[i] = 16 * hi + lo;
105+
} else {
106+
return false;
107+
}
108+
}
109+
return true;
110+
}
111+
#endif
112+
81113
static int if_linux_ipv6_open(void)
82114
{
83115
#if OPAL_ENABLE_IPV6
@@ -86,49 +118,45 @@ static int if_linux_ipv6_open(void)
86118
char ifname[IF_NAMESIZE];
87119
unsigned int idx, pfxlen, scope, dadstat;
88120
struct in6_addr a6;
89-
int iter;
90121
uint32_t flag;
91-
unsigned int addrbyte[16];
122+
char addrhex[sizeof a6.s6_addr * 2 + 1];
123+
char addrstr[INET6_ADDRSTRLEN];
92124

93-
while (fscanf(f, "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x %x %x %x %x %20s\n",
94-
&addrbyte[0], &addrbyte[1], &addrbyte[2], &addrbyte[3],
95-
&addrbyte[4], &addrbyte[5], &addrbyte[6], &addrbyte[7],
96-
&addrbyte[8], &addrbyte[9], &addrbyte[10], &addrbyte[11],
97-
&addrbyte[12], &addrbyte[13], &addrbyte[14], &addrbyte[15],
125+
while (fscanf(f, "%s %x %x %x %x %s\n", addrhex,
98126
&idx, &pfxlen, &scope, &dadstat, ifname) != EOF) {
99127
opal_if_t *intf;
100128

129+
if (!hexdecode(addrhex, a6.s6_addr, sizeof a6.s6_addr)) {
130+
char hostname[OPAL_MAXHOSTNAMELEN] = {0};
131+
gethostname(hostname, sizeof(hostname));
132+
opal_show_help("help-opal-if-linux-ipv6.txt",
133+
"fail to parse if_inet6", true,
134+
hostname, ifname, addrhex);
135+
continue;
136+
};
137+
inet_ntop(AF_INET6, a6.s6_addr, addrstr, sizeof addrstr);
138+
101139
opal_output_verbose(1, opal_if_base_framework.framework_output,
102-
"found interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x scope %x\n",
103-
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
104-
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
105-
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
106-
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15], scope);
140+
LOG_PREFIX "found interface %s inet6 %s scope %x\n",
141+
ifname, addrstr, scope);
107142

108143
/* Only interested in global (0x00) scope */
109144
if (scope != 0x00) {
110145
opal_output_verbose(1, opal_if_base_framework.framework_output,
111-
"skipping interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x scope %x\n",
112-
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
113-
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
114-
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
115-
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15], scope);
146+
LOG_PREFIX "skipped interface %s inet6 %s scope %x\n",
147+
ifname, addrstr, scope);
116148
continue;
117149
}
118150

119151
intf = OBJ_NEW(opal_if_t);
120152
if (NULL == intf) {
121-
opal_output(0, "opal_ifinit: unable to allocate %lu bytes\n",
153+
opal_output(0, LOG_PREFIX "unable to allocate %lu bytes\n",
122154
(unsigned long)sizeof(opal_if_t));
123155
fclose(f);
124156
return OPAL_ERR_OUT_OF_RESOURCE;
125157
}
126158
intf->af_family = AF_INET6;
127159

128-
for (iter = 0; iter < 16; iter++) {
129-
a6.s6_addr[iter] = addrbyte[iter];
130-
}
131-
132160
/* now construct the opal_if_t */
133161
opal_string_copy(intf->if_name, ifname, IF_NAMESIZE);
134162
intf->if_index = opal_list_get_size(&opal_if_list)+1;
@@ -147,17 +175,12 @@ static int if_linux_ipv6_open(void)
147175
to list */
148176
opal_list_append(&opal_if_list, &(intf->super));
149177
opal_output_verbose(1, opal_if_base_framework.framework_output,
150-
"added interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x\n",
151-
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
152-
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
153-
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
154-
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15]);
178+
LOG_PREFIX "added interface %s inet6 %s scope %x\n",
179+
ifname, addrstr, scope);
155180
} /* of while */
156181
fclose(f);
157182
}
158183
#endif /* OPAL_ENABLE_IPV6 */
159184

160185
return OPAL_SUCCESS;
161186
}
162-
163-

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