On 5/30/13 7:45 AM, Jan Kara wrote:
> Test whether SEEK_HOLE and SEEK_DATA works correctly with offsets over
> 4GB.
Hm, should we add 2T as well while we're at it?
(and does this cause any new failures?)
-Eric
> Signed-off-by: Jan Kara <jack@xxxxxxx>
> ---
> src/seek_sanity_test.c | 38 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/src/seek_sanity_test.c b/src/seek_sanity_test.c
> index 7d5868b..55e7ed6 100644
> --- a/src/seek_sanity_test.c
> +++ b/src/seek_sanity_test.c
> @@ -18,6 +18,7 @@
> */
>
> #define _XOPEN_SOURCE 500
> +#define _FILE_OFFSET_BITS 64
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <sys/vfs.h>
> @@ -191,6 +192,42 @@ static int do_lseek(int testnum, int subtest, int fd, int filsz, int origin,
> return ret;
> }
>
> +/* test a huge file to check for 4G overflows */
> +static int test10(int fd, int testnum)
> +{
> + char *buf = NULL;
> + int bufsz = alloc_size;
> + off_t filsz = 8ULL << 30; /* 8G */
> + off_t off = filsz - 2*bufsz;
> + int ret = -1;
> +
> + buf = do_malloc(bufsz);
> + if (!buf)
> + goto out;
> + memset(buf, 'a', bufsz);
> +
> + ret = do_pwrite(fd, buf, bufsz, 0);
> + if (ret)
> + goto out;
> + ret = do_pwrite(fd, buf, bufsz, off);
> + if (ret)
> + goto out;
> +
> + /* offset at the beginning */
> + ret += do_lseek(testnum, 1, fd, filsz, SEEK_HOLE, 0, bufsz);
> + ret += do_lseek(testnum, 2, fd, filsz, SEEK_HOLE, 1, bufsz);
> + ret += do_lseek(testnum, 3, fd, filsz, SEEK_DATA, 0, 0);
> + ret += do_lseek(testnum, 4, fd, filsz, SEEK_DATA, 1, 1);
> +
> + /* offset around eof */
> + ret += do_lseek(testnum, 5, fd, filsz, SEEK_HOLE, off, off + bufsz);
> + ret += do_lseek(testnum, 6, fd, filsz, SEEK_DATA, off, off);
> + ret += do_lseek(testnum, 7, fd, filsz, SEEK_DATA, off + 1, off + 1);
> +
> +out:
> + do_free(buf);
> + return ret;
> +}
> /*
> * test file with unwritten extents, have both dirty and
> * writeback pages in page cache.
> @@ -577,6 +614,7 @@ struct testrec seek_tests[] = {
> { 7, test07, "Test file with unwritten extents, only have dirty pages" },
> { 8, test08, "Test file with unwritten extents, only have unwritten pages" },
> { 9, test09, "Test file with unwritten extents, have both dirty && unwritten pages" },
> + { 10, test10, "Test a huge file" },
> };
>
> static int run_test(struct testrec *tr)
>
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