diff options
Diffstat (limited to 'lib/kernel/test/prim_file_SUITE.erl')
| -rw-r--r-- | lib/kernel/test/prim_file_SUITE.erl | 74 |
1 files changed, 73 insertions, 1 deletions
diff --git a/lib/kernel/test/prim_file_SUITE.erl b/lib/kernel/test/prim_file_SUITE.erl index a56746bbc4..4e93a593b3 100644 --- a/lib/kernel/test/prim_file_SUITE.erl +++ b/lib/kernel/test/prim_file_SUITE.erl @@ -57,6 +57,8 @@ %% System probe functions that might be handy to check from the shell -export([unix_free/1]). +-export([allocate/1]). + -include_lib("test_server/include/test_server.hrl"). -include_lib("kernel/include/file.hrl"). @@ -87,7 +89,7 @@ groups() -> cur_dir_1a, cur_dir_1b]}, {files, [], [{group, open}, {group, pos}, {group, file_info}, - truncate, sync, datasync, advise, large_write]}, + truncate, sync, datasync, advise, large_write, allocate]}, {open, [], [open1, modes, close, access, read_write, pread_write, append, exclusive]}, @@ -1359,6 +1361,76 @@ check_large_write(Dog, Fd, _, _, []) -> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +allocate(suite) -> []; +allocate(doc) -> "Tests that ?PRIM_FILE:allocate/3 at least doesn't crash."; +allocate(Config) when is_list(Config) -> + ?line Dog = test_server:timetrap(test_server:seconds(5)), + ?line PrivDir = ?config(priv_dir, Config), + ?line Allocate = filename:join(PrivDir, + atom_to_list(?MODULE) + ++"_allocate.fil"), + + Line1 = "Hello\n", + Line2 = "World!\n", + + ?line {ok, Fd} = ?PRIM_FILE:open(Allocate, [write, binary]), + allocate_and_assert(Fd, 1, iolist_size([Line1, Line2])), + ?line ok = ?PRIM_FILE:write(Fd, Line1), + ?line ok = ?PRIM_FILE:write(Fd, Line2), + ?line ok = ?PRIM_FILE:close(Fd), + + ?line {ok, Fd2} = ?PRIM_FILE:open(Allocate, [write, binary]), + allocate_and_assert(Fd2, 1, iolist_size(Line1)), + ?line ok = ?PRIM_FILE:write(Fd2, Line1), + ?line ok = ?PRIM_FILE:write(Fd2, Line2), + ?line ok = ?PRIM_FILE:close(Fd2), + + ?line {ok, Fd3} = ?PRIM_FILE:open(Allocate, [write, binary]), + allocate_and_assert(Fd3, 1, iolist_size(Line1) + 1), + ?line ok = ?PRIM_FILE:write(Fd3, Line1), + ?line ok = ?PRIM_FILE:write(Fd3, Line2), + ?line ok = ?PRIM_FILE:close(Fd3), + + ?line {ok, Fd4} = ?PRIM_FILE:open(Allocate, [write, binary]), + allocate_and_assert(Fd4, 1, 4 * iolist_size([Line1, Line2])), + ?line ok = ?PRIM_FILE:write(Fd4, Line1), + ?line ok = ?PRIM_FILE:write(Fd4, Line2), + ?line ok = ?PRIM_FILE:close(Fd4), + + ?line test_server:timetrap_cancel(Dog), + ok. + +allocate_and_assert(Fd, Offset, Length) -> + % Just verify that calls to ?PRIM_FILE:allocate/3 don't crash or have + % any other negative side effect. We can't really asssert against a + % specific return value, because support for file space pre-allocation + % depends on the OS, OS version and underlying filesystem. + % + % The Linux kernel added support for fallocate() in version 2.6.23, + % which currently works only for the ext4, ocfs2, xfs and btrfs file + % systems. posix_fallocate() is available in glibc as of version + % 2.1.94, but it was buggy until glibc version 2.7. + % + % Mac OS X, as of version 10.3, supports the fcntl operation F_PREALLOCATE. + % + % Solaris supports posix_fallocate() but only for the UFS file system + % apparently (not supported for ZFS). + % + % FreeBSD 9.0 is the first FreeBSD release supporting posix_fallocate(). + % + % For Windows there's apparently no way to pre-allocate file space, at + % least with similar API/semantics as posix_fallocate(), fallocate() or + % fcntl F_PREALLOCATE. + Result = ?PRIM_FILE:allocate(Fd, Offset, Length), + case os:type() of + {win32, _} -> + ?line {error, enotsup} = Result; + _ -> + ?line _ = Result + end. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + delete_a(suite) -> []; delete_a(doc) -> []; delete_a(Config) when is_list(Config) -> |