crash/SOURCES/0073-Fix-for-net-s-option-to-show-IPv6-addresses-on-Linux.patch

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2023-09-27 12:47:33 +00:00
From 49f689eda0bc3331beb70df17ac4990034460f2b Mon Sep 17 00:00:00 2001
From: Lianbo Jiang <lijiang@redhat.com>
Date: Thu, 9 Feb 2023 20:15:46 +0800
Subject: [PATCH 73/89] Fix for "net -s" option to show IPv6 addresses on Linux
3.13 and later
Currently, the "net -s" option fails to show IPv6 addresses and ports
for the SOURCE-PORT and DESTINATION-PORT columns on Linux 3.13 and later
kernels, which have kernel commit efe4208f47f907 ("ipv6: make lookups
simpler and faster"). For example:
crash> net -s
PID: 305524 TASK: ffff9bc449895580 CPU: 6 COMMAND: "sshd"
FD SOCKET SOCK FAMILY:TYPE SOURCE-PORT DESTINATION-PORT
3 ffff9bc446e9a680 ffff9bc4455b5940 UNIX:DGRAM
4 ffff9bc446e9c600 ffff9bc3b2b24e00 INET6:STREAM
With the patch:
crash> net -s
PID: 305524 TASK: ffff9bc449895580 CPU: 6 COMMAND: "sshd"
FD SOCKET SOCK FAMILY:TYPE SOURCE-PORT DESTINATION-PORT
3 ffff9bc446e9a680 ffff9bc4455b5940 UNIX:DGRAM
4 ffff9bc446e9c600 ffff9bc3b2b24e00 INET6:STREAM xxxx:xx:x:xxxx:xxxx:xxxx:xxxx:xxxx-22 yyyy:yy:y:yyyy:yyyy:yyyy:yyyy:yyyy-44870
Reported-by: Buland Kumar Singh <bsingh@redhat.com>
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
---
defs.h | 3 +++
net.c | 20 +++++++++++++++-----
symbols.c | 3 +++
3 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/defs.h b/defs.h
index ae5d1244e8b3..801781749666 100644
--- a/defs.h
+++ b/defs.h
@@ -2204,6 +2204,9 @@ struct offset_table { /* stash of commonly-used offsets */
long maple_range_64_slot;
long maple_metadata_end;
long maple_metadata_gap;
+ long sock_sk_common;
+ long sock_common_skc_v6_daddr;
+ long sock_common_skc_v6_rcv_saddr;
};
struct size_table { /* stash of commonly-used sizes */
diff --git a/net.c b/net.c
index 7c9c8bd9c98d..aa445ab7ee13 100644
--- a/net.c
+++ b/net.c
@@ -199,6 +199,9 @@ net_init(void)
MEMBER_OFFSET_INIT(sock_common_skc_family,
"sock_common", "skc_family");
MEMBER_OFFSET_INIT(sock_sk_type, "sock", "sk_type");
+ MEMBER_OFFSET_INIT(sock_sk_common, "sock", "__sk_common");
+ MEMBER_OFFSET_INIT(sock_common_skc_v6_daddr, "sock_common", "skc_v6_daddr");
+ MEMBER_OFFSET_INIT(sock_common_skc_v6_rcv_saddr, "sock_common", "skc_v6_rcv_saddr");
/*
* struct inet_sock {
* struct sock sk;
@@ -1104,12 +1107,19 @@ get_sock_info(ulong sock, char *buf)
break;
case SOCK_V2:
- if (INVALID_MEMBER(ipv6_pinfo_rcv_saddr) ||
- INVALID_MEMBER(ipv6_pinfo_daddr))
+ if (VALID_MEMBER(ipv6_pinfo_rcv_saddr) &&
+ VALID_MEMBER(ipv6_pinfo_daddr)) {
+ ipv6_rcv_saddr = ipv6_pinfo + OFFSET(ipv6_pinfo_rcv_saddr);
+ ipv6_daddr = ipv6_pinfo + OFFSET(ipv6_pinfo_daddr);
+ } else if (VALID_MEMBER(sock_sk_common) &&
+ VALID_MEMBER(sock_common_skc_v6_daddr) &&
+ VALID_MEMBER(sock_common_skc_v6_rcv_saddr)) {
+ ipv6_rcv_saddr = sock + OFFSET(sock_sk_common) + OFFSET(sock_common_skc_v6_rcv_saddr);
+ ipv6_daddr = sock + OFFSET(sock_sk_common) + OFFSET(sock_common_skc_v6_daddr);
+ } else {
+ sprintf(&buf[strlen(buf)], "%s", "(cannot get IPv6 addresses)");
break;
-
- ipv6_rcv_saddr = ipv6_pinfo + OFFSET(ipv6_pinfo_rcv_saddr);
- ipv6_daddr = ipv6_pinfo + OFFSET(ipv6_pinfo_daddr);
+ }
if (!readmem(ipv6_rcv_saddr, KVADDR, u6_addr16_src, SIZE(in6_addr),
"ipv6_rcv_saddr buffer", QUIET|RETURN_ON_ERROR))
diff --git a/symbols.c b/symbols.c
index 20bfac35c1f6..54115d753601 100644
--- a/symbols.c
+++ b/symbols.c
@@ -9830,8 +9830,11 @@ dump_offset_table(char *spec, ulong makestruct)
fprintf(fp, " sock_sk_type: %ld\n",
OFFSET(sock_sk_type));
+ fprintf(fp, " sock_sk_common: %ld\n", OFFSET(sock_sk_common));
fprintf(fp, " sock_common_skc_family: %ld\n",
OFFSET(sock_common_skc_family));
+ fprintf(fp, " sock_common_skc_v6_daddr: %ld\n", OFFSET(sock_common_skc_v6_daddr));
+ fprintf(fp, " sock_common_skc_v6_rcv_saddr: %ld\n", OFFSET(sock_common_skc_v6_rcv_saddr));
fprintf(fp, " socket_alloc_vfs_inode: %ld\n",
OFFSET(socket_alloc_vfs_inode));
fprintf(fp, " inet_sock_inet: %ld\n",
--
2.37.1