Currently, the "net" command displays only the IPv4 address of a network
interface, it doesn't support outputting IPv6 address yet. For example:
Without the patch:
crash> net
NET_DEVICE NAME IP ADDRESS(ES)
ffff8d01b1205000 lo 127.0.0.1
ffff8d0087e40000 eno1 192.168.122.2
With the patch:
crash> net
NET_DEVICE NAME IP ADDRESS(ES) INET6 ADDRESS
ffff8d01b1205000 lo 127.0.0.1 ::1
ffff8d0087e40000 eno1 192.168.122.2 xxxx:xx:x:xxxx:xxxx:xxx:xxxx:xxxx, yyyy::yyyy:yyy:yyyy:yyyy
Related kernel commit:
502a2ffd7376 ("ipv6: convert idev_list to list macros")
Reported-by: Buland Kumar Singh <bsingh@xxxxxxxxxx>
Signed-off-by: Lianbo Jiang <lijiang@xxxxxxxxxx>
---
defs.h | 6 +++
net.c | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
symbols.c | 12 ++++++
3 files changed, 133 insertions(+), 4 deletions(-)
diff --git a/defs.h b/defs.h
index e76af3c78b69..1f2cf6e0ce01 100644
--- a/defs.h
+++ b/defs.h
@@ -2208,6 +2208,12 @@ struct offset_table { /* stash of commonly-used offsets */
long sock_common_skc_v6_daddr;
long sock_common_skc_v6_rcv_saddr;
long inactive_task_frame_bp;
+ long net_device_ip6_ptr;
+ long inet6_dev_addr_list;
+ long inet6_ifaddr_addr;
+ long inet6_ifaddr_if_list;
+ long inet6_ifaddr_if_next;
+ long in6_addr_in6_u;
};
struct size_table { /* stash of commonly-used sizes */
diff --git a/net.c b/net.c
index aa445ab7ee13..5da2042d83ad 100644
--- a/net.c
+++ b/net.c
@@ -41,6 +41,7 @@ struct net_table {
long in_ifaddr_ifa_next;
long in_ifaddr_ifa_address;
int net_device_name_index;
+ long dev_ip6_ptr;
} net_table = { 0 };
struct net_table *net = &net_table;
@@ -71,6 +72,7 @@ static void print_neighbour_q(ulong, int);
static void get_netdev_info(ulong, struct devinfo *);
static void get_device_name(ulong, char *);
static long get_device_address(ulong, char **, long);
+static void get_device_ip6_address(ulong, char **, long);
static void get_sock_info(ulong, char *);
static void dump_arp(void);
static void arp_state_to_flags(unsigned char);
@@ -114,6 +116,13 @@ net_init(void)
net->dev_ip_ptr = MEMBER_OFFSET_INIT(net_device_ip_ptr,
"net_device", "ip_ptr");
MEMBER_OFFSET_INIT(net_device_dev_list, "net_device", "dev_list");
+ net->dev_ip6_ptr = MEMBER_OFFSET_INIT(net_device_ip6_ptr, "net_device", "ip6_ptr");
+ MEMBER_OFFSET_INIT(inet6_dev_addr_list, "inet6_dev", "addr_list");
+ MEMBER_OFFSET_INIT(inet6_ifaddr_addr, "inet6_ifaddr", "addr");
+ MEMBER_OFFSET_INIT(inet6_ifaddr_if_list, "inet6_ifaddr", "if_list");
+ MEMBER_OFFSET_INIT(inet6_ifaddr_if_next, "inet6_ifaddr", "if_next");
+ MEMBER_OFFSET_INIT(in6_addr_in6_u, "in6_addr", "in6_u");
+
MEMBER_OFFSET_INIT(net_dev_base_head, "net", "dev_base_head");
ARRAY_LENGTH_INIT(net->net_device_name_index,
net_device_name, "net_device.name", NULL, sizeof(char));
@@ -466,7 +475,7 @@ show_net_devices(ulong task)
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
- fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
+ fprintf(fp, "%s NAME IP ADDRESS(ES) INET6 ADDRESS\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
@@ -478,6 +487,13 @@ show_net_devices(ulong task)
fprintf(fp, "%-6s ", buf);
buflen = get_device_address(next, &buf, buflen);
+
+ if (strlen(buf) > 0)
+ fprintf(fp, "%-6s ", buf);
+ else
+ fprintf(fp, "\t\t");
+
+ get_device_ip6_address(next, &buf, buflen);
fprintf(fp, "%s\n", buf);
readmem(next+net->dev_next, KVADDR, &next,
@@ -503,7 +519,7 @@ show_net_devices_v2(ulong task)
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
- fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
+ fprintf(fp, "%s NAME IP ADDRESS(ES) INET6 ADDRESS\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
@@ -531,6 +547,13 @@ show_net_devices_v2(ulong task)
fprintf(fp, "%-6s ", buf);
buflen = get_device_address(ld->list_ptr[i], &buf, buflen);
+
+ if (strlen(buf) > 0)
+ fprintf(fp, "%-6s ", buf);
+ else
+ fprintf(fp, "\t\t");
+
+ get_device_ip6_address(ld->list_ptr[i], &buf, buflen);
fprintf(fp, "%s\n", buf);
}
@@ -556,7 +579,7 @@ show_net_devices_v3(ulong task)
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
- fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
+ fprintf(fp, "%s NAME IP ADDRESS(ES) INET6 ADDRESS\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
@@ -593,7 +616,14 @@ show_net_devices_v3(ulong task)
get_device_name(ld->list_ptr[i], buf);
fprintf(fp, "%-6s ", buf);
- buflen = get_device_address(ld->list_ptr[i], &buf, buflen);
+ get_device_address(ld->list_ptr[i], &buf, buflen);
+
+ if (strlen(buf) > 0)
+ fprintf(fp, "%-6s ", buf);
+ else
+ fprintf(fp, "\t\t");
+
+ get_device_ip6_address(ld->list_ptr[i], &buf, buflen);
fprintf(fp, "%s\n", buf);
}
@@ -925,6 +955,87 @@ get_device_address(ulong devaddr, char **bufp, long buflen)
return buflen;
}
+static void
+get_device_ip6_address(ulong devaddr, char **bufp, long buflen)
+{
+ ulong ip6_ptr = 0, i, cnt = 0, pos = 0, bufsize = buflen;
+ struct list_data list_data, *ld;
+ struct in6_addr ip6_addr;
+ char *buf;
+ char str[INET6_ADDRSTRLEN + 1] = {0};
+ char buffer[INET6_ADDRSTRLEN + 4] = {0};
+ uint len = 0;
+
+ buf = *bufp;
+ BZERO(buf, buflen);
+
+ readmem(devaddr + net->dev_ip6_ptr, KVADDR,
+ &ip6_ptr, sizeof(ulong), "ip6_ptr", FAULT_ON_ERROR);
+
+ if (!ip6_ptr)
+ return;
+
+ if (MEMBER_TYPE("inet6_dev", "addr_list") == TYPE_CODE_PTR) {
+ ulong addrp = 0;
+ /*
+ * 502a2ffd7376 ("ipv6: convert idev_list to list macros")
+ * v2.6.35-rc1~473^2~733
+ */
+ readmem(ip6_ptr + OFFSET(inet6_dev_addr_list), KVADDR,
+ &addrp, sizeof(void *), "addr_list", FAULT_ON_ERROR);
+
+ while (addrp) {
+ readmem(addrp + OFFSET(in6_addr_in6_u), KVADDR, &ip6_addr,
+ sizeof(struct in6_addr), "in6_addr.in6_u", FAULT_ON_ERROR);
+ inet_ntop(AF_INET6, (void*)&ip6_addr, str, INET6_ADDRSTRLEN);
+ sprintf(buffer, "%s%s", pos ? ", " : "", str);
+ len = strlen(buffer);
+
+ if (pos + len >= bufsize) {
+ RESIZEBUF(*bufp, bufsize, bufsize + buflen);
+ buf = *bufp;
+ BZERO(buf + bufsize, buflen);
+ bufsize += buflen;
+ }
+ BCOPY(buffer, &buf[pos], len);
+ pos += len;
+ readmem(addrp + OFFSET(inet6_ifaddr_if_next), KVADDR, &addrp,
+ sizeof(void *), "inet6_ifaddr.if_next", FAULT_ON_ERROR);
+ }
+
+ return;
+ }
+
+ ld = &list_data;
+ BZERO(ld, sizeof(struct list_data));
+ ld->flags |= LIST_ALLOCATE;
+ ld->start = ip6_ptr + OFFSET(inet6_dev_addr_list);
+ cnt = do_list(ld);
+
+ for (i = 1; i < cnt; i++) {
+ ulong addr;
+
+ addr = ld->list_ptr[i] + OFFSET(inet6_ifaddr_addr);
+ addr -= OFFSET(inet6_ifaddr_if_list);
+ readmem(addr + OFFSET(in6_addr_in6_u), KVADDR, &ip6_addr,
+ sizeof(struct in6_addr), "in6_addr.in6_u", FAULT_ON_ERROR);
+
+ inet_ntop(AF_INET6, (void*)&ip6_addr, str, INET6_ADDRSTRLEN);
+ sprintf(buffer, "%s%s", pos ? ", " : "", str);
+ len = strlen(buffer);
+
+ if (pos + len >= bufsize) {
+ RESIZEBUF(*bufp, bufsize, bufsize + buflen);
+ buf = *bufp;
+ BZERO(buf + bufsize, buflen);
+ bufsize += buflen;
+ }
+ BCOPY(buffer, &buf[pos], len);
+ pos += len;
+ }
+
+ FREEBUF(ld->list_ptr);
+}
/*
* Get the family, type, local and destination address/port pairs.
*/
diff --git a/symbols.c b/symbols.c
index a974fc9141a0..c8bdeb841cdc 100644
--- a/symbols.c
+++ b/symbols.c
@@ -9787,6 +9787,18 @@ dump_offset_table(char *spec, ulong makestruct)
OFFSET(net_device_addr_len));
fprintf(fp, " net_device_ip_ptr: %ld\n",
OFFSET(net_device_ip_ptr));
+ fprintf(fp, " net_device_ip6_ptr: %ld\n",
+ OFFSET(net_device_ip6_ptr));
+ fprintf(fp, " inet6_dev_addr_list: %ld\n",
+ OFFSET(inet6_dev_addr_list));
+ fprintf(fp, " inet6_ifaddr_addr: %ld\n",
+ OFFSET(inet6_ifaddr_addr));
+ fprintf(fp, " inet6_ifaddr_if_list: %ld\n",
+ OFFSET(inet6_ifaddr_if_list));
+ fprintf(fp, " inet6_ifaddr_if_next: %ld\n",
+ OFFSET(inet6_ifaddr_if_next));
+ fprintf(fp, " in6_addr_in6_u: %ld\n",
+ OFFSET(in6_addr_in6_u));
fprintf(fp, " net_device_dev_list: %ld\n",
OFFSET(net_device_dev_list));
fprintf(fp, " net_dev_base_head: %ld\n",
--
2.37.1
--
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