lib: add igt_allow_unlimited_files()

Share the implementation to tweak the maximum number of open files.
The version in tests/i915/gem_exec_reuse.c was a little bit different,
but I don't think it needs to be because it would still return a
failure if any of the calls to setrlimit() fail. So I'm using the other
one.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 24 deletions

diff --git a/tests/i915/gem_exec_reuse.c b/tests/i915/gem_exec_reuse.c
index 55904718..9cba1354 100644
--- a/tests/i915/gem_exec_reuse.c
+++ b/tests/i915/gem_exec_reuse.c
@@ -56,29 +56,6 @@ static void noop(struct noop *n,
 	gem_execbuf(n->fd, &execbuf);
 }
 
-static bool allow_unlimited_files(void)
-{
-	struct rlimit rlim;
-	unsigned nofile_rlim = 1024*1024;
-
-	FILE *file = fopen("/proc/sys/fs/file-max", "r");
-	if (file) {
-		igt_assert(fscanf(file, "%u", &nofile_rlim) == 1);
-		fclose(file);
-	}
-
-	if (getrlimit(RLIMIT_NOFILE, &rlim))
-		return false;
-
-	rlim.rlim_cur = rlim.rlim_max;
-	if (setrlimit(RLIMIT_NOFILE, &rlim))
-		return false;
-
-	rlim.rlim_cur = nofile_rlim;
-	rlim.rlim_max = nofile_rlim;
-	return setrlimit(RLIMIT_NOFILE, &rlim) == 0;
-}
-
 static uint64_t vfs_file_max(void)
 {
 	long long unsigned max = 80000;
@@ -126,7 +103,7 @@ igt_main
 		uint32_t bbe = MI_BATCH_BUFFER_END;
 		unsigned engine;
 
-		allow_unlimited_files();
+		igt_allow_unlimited_files();
 
 		no.fd = drm_open_driver(DRIVER_INTEL);
 		igt_require_gem(no.fd);