Subject: Allow gssd to handle more file descriptors.
References: bnc#787272

gssd is currently limited to 256 file descriptors.

Sometimes it is useful to allow more.
As 'poll' will only allow up to RLIMIT_NOFILE which defaults to 1024,
change gssd to allocate space for RLIMIT_NOFILE file descriptors.
Then if more are needed, "ulimit -n XX" can achieve it, and would 
be needed anyway.

Not that krb5 has a limit on 1024 which this patch cannot help.

Signed-off-by: NeilBrown <neilb@suse.de>

---
 utils/gssd/gssd_proc.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- nfs-utils-1.2.3.orig/utils/gssd/gssd_proc.c
+++ nfs-utils-1.2.3/utils/gssd/gssd_proc.c
@@ -52,6 +52,7 @@
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <sys/fsuid.h>
+#include <sys/resource.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -396,7 +397,7 @@ get_poll_index(int *ind)
 	int i;
 
 	*ind = -1;
-	for (i=0; i<FD_ALLOC_BLOCK; i++) {
+	for (i=0; i < pollsize; i++) {
 		if (pollarray[i].events == 0) {
 			*ind = i;
 			break;
@@ -487,9 +488,13 @@ fail_keep_client:
 void
 init_client_list(void)
 {
+	struct rlimit rlim;
 	TAILQ_INIT(&clnt_list);
 	/* Eventually plan to grow/shrink poll array: */
 	pollsize = FD_ALLOC_BLOCK;
+	if (getrlimit(RLIMIT_NOFILE, &rlim) == 0 &&
+	    rlim.rlim_cur != RLIM_INFINITY)
+		pollsize = rlim.rlim_cur;
 	pollarray = calloc(pollsize, sizeof(struct pollfd));
 }
 
@@ -571,8 +576,7 @@ process_pipedir(char *pipe_name)
 
 	update_old_clients(namelist, j, pipe_name);
 	for (i=0; i < j; i++) {
-		if (i < FD_ALLOC_BLOCK
-				&& !strncmp(namelist[i]->d_name, "clnt", 4)
+		if (!strncmp(namelist[i]->d_name, "clnt", 4)
 				&& !find_client(namelist[i]->d_name, pipe_name))
 			process_clnt_dir(namelist[i]->d_name, pipe_name);
 		free(namelist[i]);