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bgpd: Fix graceful-restart JSON outputs and the crash

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Without this patch:

```
donatas-pc# show bgp neighbors graceful-restart json
vtysh: error reading from bgpd: Resource temporarily unavailable (11)Warning: closing connection to bgpd because of an I/O error!
donatas-pc#
```

And, invalid JSON generated when multiple neighbors exist due to json_neighbor
being freed in a loop.

After the patch:

```
donatas-pc# show bgp ipv4 neighbors 192.168.10.124 graceful-restart json
{
  "192.168.10.124":{
    "neighborAddr":"192.168.10.124",
    "localGrMode":"Helper*",
    "remoteGrMode":"Restart",
    "rBit":false,
    "nBit":true,
    "timers":{
      "configuredRestartTimer":120,
      "receivedRestartTimer":120
    },
    "ipv4Unicast":{
      "fBit":true,
      "endOfRibStatus":{
        "endOfRibSend":true,
        "endOfRibSentAfterUpdate":false,
        "endOfRibRecv":true
      },
      "timers":{
        "stalePathTimer":360
      }
    }
  }
}
donatas-pc# show bgp neighbors graceful-restart json
{
  "192.168.10.124":{
    "neighborAddr":"192.168.10.124",
    "localGrMode":"Helper*",
    "remoteGrMode":"Restart",
    "rBit":false,
    "nBit":true,
    "timers":{
      "configuredRestartTimer":120,
      "receivedRestartTimer":120
    },
    "ipv4Unicast":{
      "fBit":true,
      "endOfRibStatus":{
        "endOfRibSend":true,
        "endOfRibSentAfterUpdate":false,
        "endOfRibRecv":true
      },
      "timers":{
        "stalePathTimer":360
      }
    }
  },
  "2a02:4780:abc::2":{
    "neighborAddr":"2a02:4780:abc::2",
    "localGrMode":"Helper*",
    "remoteGrMode":"Restart",
    "rBit":false,
    "nBit":true,
    "timers":{
      "configuredRestartTimer":120,
      "receivedRestartTimer":120
    },
    "ipv4Unicast":{
      "fBit":true,
      "endOfRibStatus":{
        "endOfRibSend":true,
        "endOfRibSentAfterUpdate":false,
        "endOfRibRecv":true
      },
      "timers":{
        "stalePathTimer":360
      }
    },
    "ipv6Unicast":{
      "fBit":true,
      "endOfRibStatus":{
        "endOfRibSend":true,
        "endOfRibSentAfterUpdate":true,
        "endOfRibRecv":true
      },
      "timers":{
        "stalePathTimer":360
      }
    }
  }
}
donatas-pc#
```

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2022-12-11 21:00:19 +02:00
parent f88420c3a5
commit 403e64f834
2 changed files with 66 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

134
bgpd/bgp_vty.c
View File

@ -158,9 +158,7 @@ static struct peer_group *listen_range_exists(struct bgp *bgp,
struct prefix *range, int exact);
static void bgp_show_global_graceful_restart_mode_vty(struct vty *vty,
struct bgp *bgp,
bool use_json,
json_object *json);
struct bgp *bgp);
static int bgp_show_neighbor_graceful_restart_afi_all(struct vty *vty,
enum show_type type,
@ -11856,7 +11854,6 @@ static void bgp_show_peer_afi_orf_cap(struct vty *vty, struct peer *p,
static void bgp_show_neighnor_graceful_restart_flags(struct vty *vty,
struct peer *p,
bool use_json,
json_object *json)
{
bool rbit = false;
@ -11869,7 +11866,7 @@ static void bgp_show_neighnor_graceful_restart_flags(struct vty *vty,
nbit = CHECK_FLAG(p->cap, PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV);
}
if (use_json) {
if (json) {
json_object_boolean_add(json, "rBit", rbit);
json_object_boolean_add(json, "nBit", nbit);
} else {
@ -11880,12 +11877,11 @@ static void bgp_show_neighnor_graceful_restart_flags(struct vty *vty,
static void bgp_show_neighbor_graceful_restart_remote_mode(struct vty *vty,
struct peer *peer,
bool use_json,
json_object *json)
{
const char *mode = "NotApplicable";
if (!use_json)
if (!json)
vty_out(vty, "\n Remote GR Mode: ");
if (CHECK_FLAG(peer->cap, PEER_CAP_RESTART_ADV)
@ -11908,20 +11904,19 @@ static void bgp_show_neighbor_graceful_restart_remote_mode(struct vty *vty,
}
}
if (use_json) {
if (json)
json_object_string_add(json, "remoteGrMode", mode);
} else
else
vty_out(vty, mode, "\n");
}
static void bgp_show_neighbor_graceful_restart_local_mode(struct vty *vty,
struct peer *p,
bool use_json,
json_object *json)
{
const char *mode = "Invalid";
if (!use_json)
if (!json)
vty_out(vty, " Local GR Mode: ");
if (bgp_peer_gr_mode_get(p) == PEER_HELPER)
@ -11941,15 +11936,14 @@ static void bgp_show_neighbor_graceful_restart_local_mode(struct vty *vty,
mode = "Invalid*";
}
if (use_json) {
if (json)
json_object_string_add(json, "localGrMode", mode);
} else {
else
vty_out(vty, mode, "\n");
}
}
static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
struct vty *vty, struct peer *peer, bool use_json, json_object *json)
struct vty *vty, struct peer *peer, json_object *json)
{
afi_t afi;
safi_t safi;
@ -11966,7 +11960,7 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
!CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV))
continue;
if (use_json) {
if (json) {
json_afi_safi = json_object_new_object();
json_endofrib_status = json_object_new_object();
json_timer = json_object_new_object();
@ -11977,7 +11971,7 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
else
eor_flag = false;
if (!use_json) {
if (!json) {
vty_out(vty, " %s:\n",
get_afi_safi_str(afi, safi, false));
@ -11988,25 +11982,25 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
CHECK_FLAG(peer->af_cap[afi][safi],
PEER_CAP_RESTART_AF_PRESERVE_RCV)) {
if (use_json) {
if (json) {
json_object_boolean_true_add(json_afi_safi,
"fBit");
} else
vty_out(vty, "True\n");
} else {
if (use_json)
if (json)
json_object_boolean_false_add(json_afi_safi,
"fBit");
else
vty_out(vty, "False\n");
}
if (!use_json)
if (!json)
vty_out(vty, " End-of-RIB sent: ");
if (CHECK_FLAG(peer->af_sflags[afi][safi],
PEER_STATUS_EOR_SEND)) {
if (use_json) {
if (json) {
json_object_boolean_true_add(
json_endofrib_status, "endOfRibSend");
@ -12019,7 +12013,7 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
PRINT_EOR(eor_flag);
}
} else {
if (use_json) {
if (json) {
json_object_boolean_false_add(
json_endofrib_status, "endOfRibSend");
json_object_boolean_false_add(
@ -12033,25 +12027,25 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
}
}
if (!use_json)
if (!json)
vty_out(vty, " End-of-RIB received: ");
if (CHECK_FLAG(peer->af_sflags[afi][safi],
PEER_STATUS_EOR_RECEIVED)) {
if (use_json)
if (json)
json_object_boolean_true_add(
json_endofrib_status, "endOfRibRecv");
else
vty_out(vty, "Yes\n");
} else {
if (use_json)
if (json)
json_object_boolean_false_add(
json_endofrib_status, "endOfRibRecv");
else
vty_out(vty, "No\n");
}
if (use_json) {
if (json) {
json_object_int_add(json_timer, "stalePathTimer",
peer->bgp->stalepath_time);
@ -12111,7 +12105,7 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
peer->bgp->gr_info[afi][safi]
.t_select_deferral));
}
if (use_json) {
if (json) {
json_object_object_add(json_afi_safi, "endOfRibStatus",
json_endofrib_status);
json_object_object_add(json_afi_safi, "timers",
@ -12125,10 +12119,9 @@ static void bgp_show_neighbor_graceful_restart_capability_per_afi_safi(
static void bgp_show_neighbor_graceful_restart_time(struct vty *vty,
struct peer *p,
bool use_json,
json_object *json)
{
if (use_json) {
if (json) {
json_object *json_timer = NULL;
json_timer = json_object_new_object();
@ -12164,7 +12157,7 @@ static void bgp_show_neighbor_graceful_restart_time(struct vty *vty,
}
static void bgp_show_peer_gr_status(struct vty *vty, struct peer *p,
bool use_json, json_object *json)
json_object *json)
{
char dn_flag[2] = {0};
/* '*' + v6 address of neighbor */
@ -12174,7 +12167,7 @@ static void bgp_show_peer_gr_status(struct vty *vty, struct peer *p,
dn_flag[0] = '*';
if (p->conf_if) {
if (use_json)
if (json)
json_object_string_addf(json, "neighborAddr", "%pSU",
&p->su);
else
@ -12184,7 +12177,7 @@ static void bgp_show_peer_gr_status(struct vty *vty, struct peer *p,
snprintf(neighborAddr, sizeof(neighborAddr), "%s%s", dn_flag,
p->host);
if (use_json)
if (json)
json_object_string_add(json, "neighborAddr",
neighborAddr);
else
@ -12192,7 +12185,7 @@ static void bgp_show_peer_gr_status(struct vty *vty, struct peer *p,
}
/* more gr info in new format */
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, use_json, json);
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, json);
}
static void bgp_show_peer_afi(struct vty *vty, struct peer *p, afi_t afi,
@ -14174,7 +14167,7 @@ static void bgp_show_peer(struct vty *vty, struct peer *p, bool use_json,
thread_timer_remain_second(p->t_gr_stale) *
1000);
/* more gr info in new format */
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, use_json, json_grace);
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, json_grace);
json_object_object_add(json_neigh, "gracefulRestartInfo",
json_grace);
} else {
@ -14220,7 +14213,7 @@ static void bgp_show_peer(struct vty *vty, struct peer *p, bool use_json,
thread_timer_remain_second(p->t_gr_stale));
/* more gr info in new format */
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, use_json, NULL);
BGP_SHOW_PEER_GR_CAPABILITY(vty, p, NULL);
}
if (use_json) {
@ -14682,20 +14675,14 @@ static int bgp_show_neighbor_graceful_restart(struct vty *vty, struct bgp *bgp,
enum show_type type,
union sockunion *su,
const char *conf_if, afi_t afi,
bool use_json)
json_object *json)
{
struct listnode *node, *nnode;
struct peer *peer;
int find = 0;
safi_t safi = SAFI_UNICAST;
json_object *json = NULL;
json_object *json_neighbor = NULL;
if (use_json) {
json = json_object_new_object();
json_neighbor = json_object_new_object();
}
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (!CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
@ -14704,15 +14691,15 @@ static int bgp_show_neighbor_graceful_restart(struct vty *vty, struct bgp *bgp,
if ((peer->afc[afi][safi]) == 0)
continue;
if (type == show_all) {
bgp_show_peer_gr_status(vty, peer, use_json,
json_neighbor);
if (json)
json_neighbor = json_object_new_object();
if (use_json) {
if (type == show_all) {
bgp_show_peer_gr_status(vty, peer, json_neighbor);
if (json)
json_object_object_add(json, peer->host,
json_neighbor);
json_neighbor = NULL;
}
} else if (type == show_peer) {
if (conf_if) {
@ -14722,41 +14709,33 @@ static int bgp_show_neighbor_graceful_restart(struct vty *vty, struct bgp *bgp,
&& !strcmp(peer->hostname, conf_if))) {
find = 1;
bgp_show_peer_gr_status(vty, peer,
use_json,
json_neighbor);
}
} else {
if (sockunion_same(&peer->su, su)) {
find = 1;
bgp_show_peer_gr_status(vty, peer,
use_json,
json_neighbor);
}
}
if (use_json && find)
if (json && find)
json_object_object_add(json, peer->host,
json_neighbor);
}
if (find) {
json_neighbor = NULL;
if (find)
break;
}
}
if (type == show_peer && !find) {
if (use_json)
if (json)
json_object_boolean_true_add(json, "bgpNoSuchNeighbor");
else
vty_out(vty, "%% No such neighbor\n");
}
if (use_json) {
if (json_neighbor)
json_object_free(json_neighbor);
vty_json(vty, json);
} else {
if (!json)
vty_out(vty, "\n");
}
return CMD_SUCCESS;
}
@ -14869,7 +14848,7 @@ static int bgp_show_neighbor(struct vty *vty, struct bgp *bgp,
static void bgp_show_neighbor_graceful_restart_vty(struct vty *vty,
enum show_type type,
const char *ip_str,
afi_t afi, bool use_json)
afi_t afi, json_object *json)
{
int ret;
@ -14881,21 +14860,20 @@ static void bgp_show_neighbor_graceful_restart_vty(struct vty *vty,
if (!bgp)
return;
if (!use_json)
bgp_show_global_graceful_restart_mode_vty(vty, bgp, use_json,
NULL);
if (!json)
bgp_show_global_graceful_restart_mode_vty(vty, bgp);
if (ip_str) {
ret = str2sockunion(ip_str, &su);
if (ret < 0)
bgp_show_neighbor_graceful_restart(
vty, bgp, type, NULL, ip_str, afi, use_json);
bgp_show_neighbor_graceful_restart(vty, bgp, type, NULL,
ip_str, afi, json);
else
bgp_show_neighbor_graceful_restart(vty, bgp, type, &su,
NULL, afi, use_json);
NULL, afi, json);
} else
bgp_show_neighbor_graceful_restart(vty, bgp, type, NULL, NULL,
afi, use_json);
afi, json);
}
static void bgp_show_all_instances_neighbors_vty(struct vty *vty,
@ -15215,9 +15193,7 @@ DEFUN (show_ip_bgp_lcommunity_info,
/* Graceful Restart */
static void bgp_show_global_graceful_restart_mode_vty(struct vty *vty,
struct bgp *bgp,
bool use_json,
json_object *json)
struct bgp *bgp)
{
@ -15252,22 +15228,32 @@ static int bgp_show_neighbor_graceful_restart_afi_all(struct vty *vty,
const char *ip_str,
afi_t afi, bool use_json)
{
json_object *json = NULL;
if (use_json)
json = json_object_new_object();
if ((afi == AFI_MAX) && (ip_str == NULL)) {
afi = AFI_IP;
while ((afi != AFI_L2VPN) && (afi < AFI_MAX)) {
bgp_show_neighbor_graceful_restart_vty(
vty, type, ip_str, afi, use_json);
vty, type, ip_str, afi, json);
afi++;
}
} else if (afi != AFI_MAX) {
bgp_show_neighbor_graceful_restart_vty(vty, type, ip_str, afi,
use_json);
json);
} else {
if (json)
json_object_free(json);
return CMD_ERR_INCOMPLETE;
}
if (json)
vty_json(vty, json);
return CMD_SUCCESS;
}
/* Graceful Restart */

16
bgpd/bgp_vty.h
View File

@ -56,18 +56,14 @@ struct bgp;
"V AS LocalAS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc\n"
#define BGP_SHOW_SUMMARY_HEADER_FAILED "EstdCnt DropCnt ResetTime Reason\n"
#define BGP_SHOW_PEER_GR_CAPABILITY(vty, p, use_json, json) \
#define BGP_SHOW_PEER_GR_CAPABILITY(vty, p, json) \
do { \
bgp_show_neighbor_graceful_restart_local_mode(vty, p, \
use_json, json); \
bgp_show_neighbor_graceful_restart_remote_mode( \
vty, p, use_json, json); \
bgp_show_neighnor_graceful_restart_flags(vty, p, use_json, \
json); \
bgp_show_neighbor_graceful_restart_time(vty, p, use_json, \
json); \
bgp_show_neighbor_graceful_restart_local_mode(vty, p, json); \
bgp_show_neighbor_graceful_restart_remote_mode(vty, p, json); \
bgp_show_neighnor_graceful_restart_flags(vty, p, json); \
bgp_show_neighbor_graceful_restart_time(vty, p, json); \
bgp_show_neighbor_graceful_restart_capability_per_afi_safi( \
vty, p, use_json, json); \
vty, p, json); \
} while (0)
#define VTY_BGP_GR_DEFINE_LOOP_VARIABLE \