selftests/mm/gup_longterm.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * GUP long-term page pinning tests.
54 	 * R/W long-term pinning. For these filesystems, we can be fairly sure  in fs_is_unknown()
91 static void do_test(int fd, size_t size, enum test_type type, bool shared)  in do_test()  argument
112 		   shared ? MAP_SHARED : MAP_PRIVATE, fd, 0);  in do_test()
114 		if (size == pagesize || shared)  in do_test()
122 	 * Fault in the page writable such that GUP-fast can eventually pin  in do_test()
143 		if (rw && shared && fs_is_unknown(fs_type)) {  in do_test()
149 		 * expected to work. Otherwise, we expect long-term R/W pinning  in do_test()
152 		should_work = !shared || !rw ||  in do_test()
175 		 * TODO: if the kernel ever supports long-term R/W pinning on  in do_test()
188 		if (shared && fs_is_unknown(fs_type)) {  in do_test()
192 		should_work = !shared ||  in do_test()
378 		"R/W longterm GUP pin in MAP_SHARED file mapping",
382 		"R/W longterm GUP-fast pin in MAP_SHARED file mapping",
386 		"R/O longterm GUP pin in MAP_SHARED file mapping",
390 		"R/O longterm GUP-fast pin in MAP_SHARED file mapping",
394 		"R/W longterm GUP pin in MAP_PRIVATE file mapping",
398 		"R/W longterm GUP-fast pin in MAP_PRIVATE file mapping",
402 		"R/O longterm GUP pin in MAP_PRIVATE file mapping",
406 		"R/O longterm GUP-fast pin in MAP_PRIVATE file mapping",
425 	run_with_memfd(test_case->fn, test_case->desc);  in run_test_case()
426 	run_with_tmpfile(test_case->fn, test_case->desc);  in run_test_case()
427 	run_with_local_tmpfile(test_case->fn, test_case->desc);  in run_test_case()
429 		run_with_memfd_hugetlb(test_case->fn, test_case->desc,  in run_test_case()