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tests: detect running bcache test on tmpfs

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When test happens to run in tmpfs, it cannot use O_DIRECT (unsupported
with tmpfs).

CHECKME: unsure if detection of tmpfs is 'valid' but kind of works and
is very simple.
This commit is contained in:
Zdenek Kabelac 2018-05-11 23:02:10 +02:00
parent 79b2961399
commit fa8d0b5766
1 changed files with 21 additions and 8 deletions
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23
test/unit/bcache_utils_t.c
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@ -14,6 +14,10 @@
#define _GNU_SOURCE
#include "bcache.h"
#include "framework.h"
#include "units.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
@ -21,10 +25,7 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "bcache.h"
#include "framework.h"
#include "units.h"
#include <sys/statvfs.h>
//----------------------------------------------------------------
@ -53,6 +54,16 @@ static void *_fix_init(struct io_engine *engine)
uint8_t buffer[T_BLOCK_SIZE];
struct fixture *f = malloc(sizeof(*f));
unsigned b, i;
struct statvfs fsdata;
static int _runs_is_tmpfs = -1;
if (_runs_is_tmpfs == -1) {
// With testing in tmpfs directory O_DIRECT cannot be used
// tmpfs has f_fsid == 0 (unsure if this is best guess)
_runs_is_tmpfs = (statvfs(".", &fsdata) == 0 && !fsdata.f_fsid) ? 1 : 0;
if (_runs_is_tmpfs)
printf(" Running test in tmpfs, *NOT* using O_DIRECT\n");
}
T_ASSERT(f);
@ -65,11 +76,13 @@ static void *_fix_init(struct io_engine *engine)
buffer[i] = _pattern_at(INIT_PATTERN, byte(b, i));
T_ASSERT(write(f->fd, buffer, T_BLOCK_SIZE) > 0);
}
close(f->fd);
if (!_runs_is_tmpfs) {
close(f->fd);
// reopen with O_DIRECT
f->fd = open(f->fname, O_RDWR | O_DIRECT);
T_ASSERT(f->fd >= 0);
}
f->cache = bcache_create(T_BLOCK_SIZE / 512, NR_BLOCKS, engine);
T_ASSERT(f->cache);