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Fix mmap() usage in ztest.

Browse Source 
illumos/illumos-gate@ad135b5d64
Illumos changeset: 13700:2889e2596bd6

Note that this is only a partial port of the aforementioned Illumos
changeset.

Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Eric Schrock <Eric.Schrock@delphix.com>

Ported to zfsonlinux by: Etienne Dechamps <etienne.dechamps@ovh.net>
This commit is contained in:
Christopher Siden 2012-05-21 12:11:39 -07:00 committed by Brian Behlendorf
parent c242c188fd
commit 22257dc0d5
1 changed files with 21 additions and 6 deletions
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27
cmd/ztest/ztest.c
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@ -5822,7 +5822,6 @@ setup_fds(void)
char *tmp = tempnam(NULL, NULL);
fd = open(tmp, O_RDWR | O_CREAT, 0700);
ASSERT3S(fd, >=, 0);
VERIFY3S(ftruncate(fd, sizeof (ztest_shared_hdr_t)), ==, 0);
if (fd != ZTEST_FD_DATA) {
VERIFY3S(dup2(fd, ZTEST_FD_DATA), ==, ZTEST_FD_DATA);
close(fd);
@ -5838,15 +5837,32 @@ setup_fds(void)
}
}
static int
shared_data_size(ztest_shared_hdr_t *hdr)
{
int size;
size = hdr->zh_hdr_size;
size += hdr->zh_opts_size;
size += hdr->zh_size;
size += hdr->zh_stats_size * hdr->zh_stats_count;
size += hdr->zh_ds_size * hdr->zh_ds_count;
return (size);
}
static void
setup_hdr(void)
{
int size;
ztest_shared_hdr_t *hdr;
hdr = (void *)mmap(0, P2ROUNDUP(sizeof (*hdr), getpagesize()),
PROT_READ | PROT_WRITE, MAP_SHARED, ZTEST_FD_DATA, 0);
ASSERT(hdr != MAP_FAILED);
VERIFY3U(0, ==, ftruncate(ZTEST_FD_DATA, sizeof (ztest_shared_hdr_t)));
hdr->zh_hdr_size = sizeof (ztest_shared_hdr_t);
hdr->zh_opts_size = sizeof (ztest_shared_opts_t);
hdr->zh_size = sizeof (ztest_shared_t);
@ -5855,6 +5871,9 @@ setup_hdr(void)
hdr->zh_ds_size = sizeof (ztest_shared_ds_t);
hdr->zh_ds_count = ztest_opts.zo_datasets;
size = shared_data_size(hdr);
VERIFY3U(0, ==, ftruncate(ZTEST_FD_DATA, size));
(void) munmap((caddr_t)hdr, P2ROUNDUP(sizeof (*hdr), getpagesize()));
}
@ -5869,11 +5888,7 @@ setup_data(void)
PROT_READ, MAP_SHARED, ZTEST_FD_DATA, 0);
ASSERT(hdr != MAP_FAILED);
size = hdr->zh_hdr_size;
size += hdr->zh_opts_size;
size += hdr->zh_size;
size += hdr->zh_stats_size * hdr->zh_stats_count;
size += hdr->zh_ds_size * hdr->zh_ds_count;
size = shared_data_size(hdr);
(void) munmap((caddr_t)hdr, P2ROUNDUP(sizeof (*hdr), getpagesize()));
hdr = ztest_shared_hdr = (void *)mmap(0, P2ROUNDUP(size, getpagesize()),