selftests/mm/khugepaged.c

74 static struct file_info finfo;
115 	if (file_ops && finfo.type == VMA_FILE)
116 		thp_set_read_ahead_path(finfo.dev_queue_read_ahead_path);
136 	finfo.dir = dir;
137 	stat(finfo.dir, &path_stat);
139 		printf("%s: Not a directory (%s)\n", __func__, finfo.dir);
142 	if (snprintf(finfo.path, sizeof(finfo.path), "%s/" TEST_FILE,
143 		     finfo.dir) >= sizeof(finfo.path)) {
147 	if (statfs(finfo.dir, &fs)) {
151 	finfo.type = fs.f_type == TMPFS_MAGIC ? VMA_SHMEM : VMA_FILE;
152 	if (finfo.type == VMA_SHMEM)
168 		if (snprintf(finfo.dev_queue_read_ahead_path,
169 			     sizeof(finfo.dev_queue_read_ahead_path),
172 		    >= sizeof(finfo.dev_queue_read_ahead_path)) {
197 			if (snprintf(finfo.dev_queue_read_ahead_path,
198 				     sizeof(finfo.dev_queue_read_ahead_path),
200 				     str) >= sizeof(finfo.dev_queue_read_ahead_path)) {
373 	unlink(finfo.path);  /* Cleanup from previous failed tests */
374 	printf("Creating %s for collapse%s...", finfo.path,
375 	       finfo.type == VMA_SHMEM ? " (tmpfs)" : "");
376 	fd = open(finfo.path, O_DSYNC | O_CREAT | O_RDWR | O_TRUNC | O_EXCL,
391 	printf("Opening %s read only for collapse...", finfo.path);
392 	finfo.fd = open(finfo.path, O_RDONLY, 777);
393 	if (finfo.fd < 0) {
398 		 MAP_PRIVATE, finfo.fd, 0);
413 	close(finfo.fd);
414 	unlink(finfo.path);
427 	switch (finfo.type) {
443 	finfo.fd = memfd_create("khugepaged-selftest-collapse-shmem", 0);
444 	if (finfo.fd < 0)  {
448 	if (ftruncate(finfo.fd, size)) {
452 	p = mmap(BASE_ADDR, size, PROT_READ | PROT_WRITE, MAP_SHARED, finfo.fd,
464 	close(finfo.fd);
608 	return ops == &__file_ops && finfo.type == VMA_SHMEM;