rpc: fix binding brick issue while bind-insecure is enabled

This patch is backport of http://review.gluster.org/#/c/11512/

> problem:

> When bind-insecure is turned on (which is the default now), it may happen
> that brick is not able to bind to port assigned by Glusterd for example
> 49192-49195...
>
> It seems to occur because the rpc_clnt connections are binding to ports in
> the same range. so brick fails to bind to a port which is already used by
> someone else
>
> solution:
>
> fix for now is to  make rpc_clnt to get port numbers from 65535 in a
> descending
> order, as a result port clash is minimized
>
> other fixes:
>
> previously rdma binds to port >= 1024 if it cannot find a free port < 1024,
> even when bind insecure was turned off(ref to commit '0e3fd04e'), this patch
> add's a check for bind-insecure in gf_rdma_client_bind function
>
> This patch also re-enable bind-insecure and allow insecure by default
> which was reverted (ref: commit cef1720) previously

> Change-Id: Ia1cfa93c5454e2ae0ff57813689b75de282ebd07
> BUG: 1238661
> Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

Change-Id: Iea55f9b2a57b5e24d3df2c5fafae12fe99e9dee0
BUG: 1246481
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-on: http://review.gluster.org/11758
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 5302a47cb1d..67728350508 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -88,6 +88,7 @@ void trap (void);
  */
 #define GF_NFS3_PORT    2049
 #define GF_CLIENT_PORT_CEILING 1024
+#define GF_PORT_MAX 65535
 
 #define GF_MINUTE_IN_SECONDS 60
 #define GF_HOUR_IN_SECONDS (60*60)
@@ -703,8 +704,9 @@ int gf_strip_whitespace (char *str, int len);
 int gf_canonicalize_path (char *path);
 char *generate_glusterfs_ctx_id (void);
 char *gf_get_reserved_ports();
-int gf_process_reserved_ports (gf_boolean_t ports[]);
-gf_boolean_t gf_ports_reserved (char *blocked_port, gf_boolean_t *ports);
+int gf_process_reserved_ports (gf_boolean_t ports[], uint32_t ceiling);
+gf_boolean_t
+gf_ports_reserved (char *blocked_port, gf_boolean_t *ports, uint32_t ceiling);
 int gf_get_hostname_from_ip (char *client_ip, char **hostname);
 gf_boolean_t gf_is_local_addr (char *hostname);
 gf_boolean_t gf_is_same_address (char *host1, char *host2);