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src/t_mmap_collision: fix hard-coded page size

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Fix the test to run on non-4k page size systems.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Jeff Moyer
2020-02-20 15:06:31 -05:00
committed by Eryu Guan
parent fc7b390389
commit 121d8fd17e
1 changed files with 21 additions and 19 deletions
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src/t_mmap_collision.c
+21 -19
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@@ -25,13 +25,12 @@
#include <sys/types.h>
#include <unistd.h>
#define PAGE(a) ((a)*0x1000)
#define FILE_SIZE PAGE(4)
void *dax_data;
int nodax_fd;
int dax_fd;
bool done;
static int pagesize;
static int file_size;
#define err_exit(op) \
{ \
@@ -49,18 +48,18 @@ void punch_hole_fn(void *ptr)
read = 0;
do {
rc = pread(nodax_fd, dax_data + read, FILE_SIZE - read,
rc = pread(nodax_fd, dax_data + read, file_size - read,
read);
if (rc > 0)
read += rc;
} while (rc > 0);
if (read != FILE_SIZE || rc != 0)
if (read != file_size || rc != 0)
err_exit("pread");
rc = fallocate(dax_fd,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
0, FILE_SIZE);
0, file_size);
if (rc < 0)
err_exit("fallocate");
@@ -81,18 +80,18 @@ void zero_range_fn(void *ptr)
read = 0;
do {
rc = pread(nodax_fd, dax_data + read, FILE_SIZE - read,
rc = pread(nodax_fd, dax_data + read, file_size - read,
read);
if (rc > 0)
read += rc;
} while (rc > 0);
if (read != FILE_SIZE || rc != 0)
if (read != file_size || rc != 0)
err_exit("pread");
rc = fallocate(dax_fd,
FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,
0, FILE_SIZE);
0, file_size);
if (rc < 0)
err_exit("fallocate");
@@ -113,11 +112,11 @@ void truncate_down_fn(void *ptr)
if (ftruncate(dax_fd, 0) < 0)
err_exit("ftruncate");
if (fallocate(dax_fd, 0, 0, FILE_SIZE) < 0)
if (fallocate(dax_fd, 0, 0, file_size) < 0)
err_exit("fallocate");
do {
rc = pread(nodax_fd, dax_data + read, FILE_SIZE - read,
rc = pread(nodax_fd, dax_data + read, file_size - read,
read);
if (rc > 0)
read += rc;
@@ -142,15 +141,15 @@ void collapse_range_fn(void *ptr)
while (!done) {
read = 0;
if (fallocate(dax_fd, 0, 0, FILE_SIZE) < 0)
if (fallocate(dax_fd, 0, 0, file_size) < 0)
err_exit("fallocate 1");
if (fallocate(dax_fd, FALLOC_FL_COLLAPSE_RANGE, 0, PAGE(1)) < 0)
if (fallocate(dax_fd, FALLOC_FL_COLLAPSE_RANGE, 0, pagesize) < 0)
err_exit("fallocate 2");
if (fallocate(dax_fd, 0, 0, FILE_SIZE) < 0)
if (fallocate(dax_fd, 0, 0, file_size) < 0)
err_exit("fallocate 3");
do {
rc = pread(nodax_fd, dax_data + read, FILE_SIZE - read,
rc = pread(nodax_fd, dax_data + read, file_size - read,
read);
if (rc > 0)
read += rc;
@@ -192,6 +191,9 @@ int main(int argc, char *argv[])
exit(0);
}
pagesize = getpagesize();
file_size = 4 * pagesize;
dax_fd = open(argv[1], O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);
if (dax_fd < 0)
err_exit("dax_fd open");
@@ -202,15 +204,15 @@ int main(int argc, char *argv[])
if (ftruncate(dax_fd, 0) < 0)
err_exit("dax_fd ftruncate");
if (fallocate(dax_fd, 0, 0, FILE_SIZE) < 0)
if (fallocate(dax_fd, 0, 0, file_size) < 0)
err_exit("dax_fd fallocate");
if (ftruncate(nodax_fd, 0) < 0)
err_exit("nodax_fd ftruncate");
if (fallocate(nodax_fd, 0, 0, FILE_SIZE) < 0)
if (fallocate(nodax_fd, 0, 0, file_size) < 0)
err_exit("nodax_fd fallocate");
dax_data = mmap(NULL, FILE_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED,
dax_data = mmap(NULL, file_size, PROT_READ|PROT_WRITE, MAP_SHARED,
dax_fd, 0);
if (dax_data == MAP_FAILED)
err_exit("mmap");
@@ -220,7 +222,7 @@ int main(int argc, char *argv[])
run_test(&truncate_down_fn);
run_test(&collapse_range_fn);
if (munmap(dax_data, FILE_SIZE) != 0)
if (munmap(dax_data, file_size) != 0)
err_exit("munmap");
err = close(dax_fd);