----- Original Message -----
> From: "DAN LI" <[email protected]>
> To: "LTP list" <[email protected]>
> Cc: [email protected], "Jan Stancek" <[email protected]>
> Sent: Monday, 1 July, 2013 9:17:23 AM
> Subject: [LTP] [PATCH v2] mmap/mmap14.c: new case to test MAP_LOCKED of mmap
>
>
> Create test case for MAP_LOCKED of mmap.
>
> Verify pages are locked by checking section "VmLck" of /proc/<pid>/status.
>
>
> Signed-off-by: DAN LI <[email protected]>
Hi,
If I run this as a user it fails:
$ ./mmap14
mmap14 1 TFAIL : mmap of mmapfile failed: errno=EAGAIN(11): Resource
temporarily unavailable
should we add tst_require_root() to setup() so that we don't have to worry
about ulimit on locked mem?
Regards,
Jan
> ---
> runtest/syscalls | 1 +
> testcases/kernel/syscalls/mmap/mmap14.c | 143
> ++++++++++++++++++++++++++++++++
> 2 files changed, 144 insertions(+)
> create mode 100644 testcases/kernel/syscalls/mmap/mmap14.c
>
> diff --git a/runtest/syscalls b/runtest/syscalls
> index eba0200..4865375 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -562,6 +562,7 @@ mmap07 mmap07
> mmap08 mmap08
> mmap09 mmap09
> mmap13 mmap13
> +mmap14 mmap14
> # test is broken, mask it for now.
> #mmap11 mmap11 -i 30000
>
> diff --git a/testcases/kernel/syscalls/mmap/mmap14.c
> b/testcases/kernel/syscalls/mmap/mmap14.c
> new file mode 100644
> index 0000000..f2f48f4
> --- /dev/null
> +++ b/testcases/kernel/syscalls/mmap/mmap14.c
> @@ -0,0 +1,143 @@
> +/*
> + * Copyright (c) 2013 FNST, DAN LI <[email protected]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
> + * the GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + */
> +
> +/*
> + * Test Description:
> + * Verify MAP_LOCKED works fine.
> + * "Lock the pages of the mapped region into memory in the manner of
> mlock(2)."
> + *
> + * Expected Result:
> + * mmap() should succeed returning the address of the mapped region,
> + * and this region should be locked into memory.
> + */
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <sys/types.h>
> +#include <errno.h>
> +#include <unistd.h>
> +#include <fcntl.h>
> +#include <string.h>
> +#include <signal.h>
> +#include <stdint.h>
> +#include <sys/stat.h>
> +#include <sys/mman.h>
> +#include <sys/shm.h>
> +
> +#include "test.h"
> +#include "usctest.h"
> +
> +#define TEMPFILE "mmapfile"
> +#define MMAPSIZE (1UL<<20)
> +#define LINELEN 256
> +
> +char *TCID = "mmap14";
> +int TST_TOTAL = 1;
> +
> +static char *addr;
> +
> +static void getvmlck(unsigned int *lock_sz);
> +static void setup(void);
> +static void cleanup(void);
> +
> +int main(int argc, char *argv[])
> +{
> + int lc;
> + char *msg;
> + unsigned int sz_before;
> + unsigned int sz_after;
> + unsigned int sz_ch;
> +
> + msg = parse_opts(argc, argv, NULL, NULL);
> + if (msg != NULL)
> + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
> +
> + setup();
> +
> + for (lc = 0; TEST_LOOPING(lc); lc++) {
> +
> + tst_count = 0;
> +
> + getvmlck(&sz_before);
> +
> + addr = mmap(NULL, MMAPSIZE, PROT_READ | PROT_WRITE,
> + MAP_PRIVATE | MAP_LOCKED | MAP_ANONYMOUS,
> + -1, 0);
> +
> + if (addr == MAP_FAILED) {
> + tst_resm(TFAIL | TERRNO, "mmap of %s failed", TEMPFILE);
> + continue;
> + }
> +
> + if (STD_FUNCTIONAL_TEST) {
> +
> + getvmlck(&sz_after);
> +
> + sz_ch = sz_after - sz_before;
> + if (sz_ch == MMAPSIZE / 1024)
> + tst_resm(TPASS, "Functionality of mmap() "
> + "successful");
> + else
> + tst_resm(TFAIL, "Expected %luK locked, "
> + "get %uK locked",
> + MMAPSIZE / 1024, sz_ch);
> +
> + } else {
> + tst_resm(TPASS, "call succeeded");
> + }
> +
> + if (munmap(addr, MMAPSIZE) != 0)
> + tst_brkm(TFAIL | TERRNO, NULL, "munmap failed");
> + }
> +
> + cleanup();
> + tst_exit();
> +
> +}
> +
> +void getvmlck(unsigned int *lock_sz)
> +{
> + int ret;
> + char line[LINELEN];
> + FILE *fstatus = NULL;
> +
> + fstatus = fopen("/proc/self/status", "r");
> + if (fstatus == NULL)
> + tst_brkm(TFAIL | TERRNO, NULL, "Open dev status failed");
> +
> + while (fgets(line, LINELEN, fstatus) != NULL)
> + if (strstr(line, "VmLck") != NULL)
> + break;
> +
> + ret = sscanf(line, "%*[^0-9]%d%*[^0-9]", lock_sz);
> + if (ret != 1)
> + tst_brkm(TFAIL | TERRNO, NULL, "Get lock size failed");
> +
> + fclose(fstatus);
> +}
> +
> +static void setup(void)
> +{
> + tst_sig(FORK, DEF_HANDLER, cleanup);
> +
> + TEST_PAUSE;
> +}
> +
> +static void cleanup(void)
> +{
> + TEST_CLEANUP;
> +}
> --
> 1.8.1
>
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