On Wed, Sep 30, 2015 at 08:53:51AM -0400, Hal Rosenstock wrote:
> From: Dan Ben Yosef <danby@xxxxxxxxxxxx>
>
> This patch avoids pushing the same pointer to the hash table that causes
> endless loop during dumping.
>
> Signed-off-by: Dan Ben Yosef <danby@xxxxxxxxxxxx>
> Signed-off-by: Hal Rosenstock <hal@xxxxxxxxxxxx>
>
I'm not sure what would cause this to happen in a real fabric, especially for
the node guids.
Regardless it seems like a good check if there is a misbehaving node on the
fabric.
Thanks, applied,
Ira
>
> ---
> libibnetdisc/src/ibnetdisc.c | 39 ++++++++++++++++++++++++++++++++---
> libibnetdisc/src/ibnetdisc_cache.c | 19 ++++++++++++++--
> libibnetdisc/src/internal.h | 4 +-
> 3 files changed, 53 insertions(+), 9 deletions(-)
>
> diff --git a/libibnetdisc/src/ibnetdisc.c b/libibnetdisc/src/ibnetdisc.c
> index e0f2d78..938a516 100644
> --- a/libibnetdisc/src/ibnetdisc.c
> +++ b/libibnetdisc/src/ibnetdisc.c
> @@ -353,7 +353,12 @@ static int recv_port_info(smp_engine_t * engine, ibnd_smp_t * smp,
> port->lmc = node->smalmc;
> }
>
> - add_to_portguid_hash(port, f_int->fabric.portstbl);
> + int rc1 = add_to_portguid_hash(port, f_int->fabric.portstbl);
> + if (rc1)
> + IBND_ERROR("Error Occurred when trying"
> + " to insert new port guid 0x%016" PRIx64 " to DB\n",
> + port->guid);
> +
> add_to_portlid_hash(port, f_int->lid2guid);
>
> if ((scan->cfg->flags & IBND_CONFIG_MLX_EPI)
> @@ -458,7 +463,11 @@ static ibnd_node_t *create_node(smp_engine_t * engine, ib_portid_t * path,
> rc->path_portid = *path;
> memcpy(rc->info, node_info, sizeof(rc->info));
>
> - add_to_nodeguid_hash(rc, f_int->fabric.nodestbl);
> + int rc1 = add_to_nodeguid_hash(rc, f_int->fabric.nodestbl);
> + if (rc1)
> + IBND_ERROR("Error Occurred when trying"
> + " to insert new node guid 0x%016" PRIx64 " to DB\n",
> + rc->guid);
>
> /* add this to the all nodes list */
> rc->next = f_int->fabric.nodes;
> @@ -607,20 +616,42 @@ ibnd_node_t *ibnd_find_node_dr(ibnd_fabric_t * fabric, char *dr_str)
> return rc->node;
> }
>
> -void add_to_nodeguid_hash(ibnd_node_t * node, ibnd_node_t * hash[])
> +int add_to_nodeguid_hash(ibnd_node_t * node, ibnd_node_t * hash[])
> {
> + int rc = 0;
> + ibnd_node_t *tblnode;
> int hash_idx = HASHGUID(node->guid) % HTSZ;
>
> + for (tblnode = hash[hash_idx]; tblnode; tblnode = tblnode->htnext) {
> + if (tblnode == node) {
> + IBND_ERROR("Duplicate Node: Node with guid 0x%016"
> + PRIx64 " already exists in nodes DB\n",
> + node->guid);
> + return 1;
> + }
> + }
> node->htnext = hash[hash_idx];
> hash[hash_idx] = node;
> + return rc;
> }
>
> -void add_to_portguid_hash(ibnd_port_t * port, ibnd_port_t * hash[])
> +int add_to_portguid_hash(ibnd_port_t * port, ibnd_port_t * hash[])
> {
> + int rc = 0;
> + ibnd_port_t *tblport;
> int hash_idx = HASHGUID(port->guid) % HTSZ;
>
> + for (tblport = hash[hash_idx]; tblport; tblport = tblport->htnext) {
> + if (tblport == port) {
> + IBND_ERROR("Duplicate Port: Port with guid 0x%016"
> + PRIx64 " already exists in ports DB\n",
> + port->guid);
> + return 1;
> + }
> + }
> port->htnext = hash[hash_idx];
> hash[hash_idx] = port;
> + return rc;
> }
>
> void create_lid2guid(f_internal_t *f_int)
> diff --git a/libibnetdisc/src/ibnetdisc_cache.c b/libibnetdisc/src/ibnetdisc_cache.c
> index d4663bf..94dd004 100644
> --- a/libibnetdisc/src/ibnetdisc_cache.c
> +++ b/libibnetdisc/src/ibnetdisc_cache.c
> @@ -515,7 +515,13 @@ static int _fill_port(ibnd_fabric_cache_t * fabric_cache, ibnd_node_t * node,
> /* achu: needed if user wishes to re-cache a loaded fabric.
> * Otherwise, mostly unnecessary to do this.
> */
> - add_to_portguid_hash(port_cache->port, fabric_cache->f_int->fabric.portstbl);
> + int rc = add_to_portguid_hash(port_cache->port,
> + fabric_cache->f_int->fabric.portstbl);
> + if (rc) {
> + IBND_DEBUG("Error Occurred when trying"
> + " to insert new port guid 0x%016" PRIx64 " to DB\n",
> + port_cache->port->guid);
> + }
> return 0;
> }
>
> @@ -538,8 +544,15 @@ static int _rebuild_nodes(ibnd_fabric_cache_t * fabric_cache)
> node->next = fabric_cache->f_int->fabric.nodes;
> fabric_cache->f_int->fabric.nodes = node;
>
> - add_to_nodeguid_hash(node_cache->node,
> - fabric_cache->f_int->fabric.nodestbl);
> + int rc = add_to_nodeguid_hash(node_cache->node,
> + fabric_cache->
> + f_int->
> + fabric.nodestbl);
> + if (rc) {
> + IBND_DEBUG("Error Occurred when trying"
> + " to insert new node guid 0x%016" PRIx64 " to DB\n",
> + node_cache->node->guid);
> + }
>
> add_to_type_list(node_cache->node, fabric_cache->f_int);
>
> diff --git a/libibnetdisc/src/internal.h b/libibnetdisc/src/internal.h
> index a50d2d7..5a32cd2 100644
> --- a/libibnetdisc/src/internal.h
> +++ b/libibnetdisc/src/internal.h
> @@ -106,9 +106,9 @@ int issue_smp(smp_engine_t * engine, ib_portid_t * portid,
> int process_mads(smp_engine_t * engine);
> void smp_engine_destroy(smp_engine_t * engine);
>
> -void add_to_nodeguid_hash(ibnd_node_t * node, ibnd_node_t * hash[]);
> +int add_to_nodeguid_hash(ibnd_node_t * node, ibnd_node_t * hash[]);
>
> -void add_to_portguid_hash(ibnd_port_t * port, ibnd_port_t * hash[]);
> +int add_to_portguid_hash(ibnd_port_t * port, ibnd_port_t * hash[]);
> void add_to_portlid_hash(ibnd_port_t * port, GHashTable *htable);
>
> void add_to_type_list(ibnd_node_t * node, f_internal_t * fabric);
> --
> 1.7.8.2
>
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