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/* 10.t - uses testdir.enospc/rwfile
- Check results on out-of-space and out-of-quota. (10.t)
- write that fills filesystem but does not go over should succeed
- write that fills filesystem and goes over should be partial
- write to full filesystem should return -ENOSPC
- read beyond end of file after ENOSPC should return 0
*/
#include "aio_setup.h"
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
int test_main(void)
{
/* Note: changing either of these requires updating the ext2-enospc.img
* filesystem image. Also, if SIZE is less than PAGE_SIZE, problems
* crop up due to ext2's preallocation.
*/
#define LIMIT 65536
#define SIZE 65536
char *buf;
int rwfd;
int status = 0, res;
rwfd = open("testdir.enospc/rwfile", O_RDWR|O_CREAT|O_TRUNC, 0600);
assert(rwfd != -1);
res = ftruncate(rwfd, 0); assert(res == 0);
buf = malloc(SIZE); assert(buf != NULL);
memset(buf, 0, SIZE);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT-SIZE, WRITE, SIZE);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT-SIZE, READ, SIZE);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT, WRITE, -ENOSPC);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT, READ, 0);
res = ftruncate(rwfd, 0); assert(res == 0);
status |= attempt_rw(rwfd, buf, SIZE, 1+LIMIT-SIZE, WRITE, SIZE-1);
status |= attempt_rw(rwfd, buf, SIZE, 1+LIMIT-SIZE, READ, SIZE-1);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT, READ, 0);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT, WRITE, -ENOSPC);
status |= attempt_rw(rwfd, buf, SIZE, LIMIT, READ, 0);
status |= attempt_rw(rwfd, buf, 0, LIMIT, WRITE, 0);
res = close(rwfd); assert(res == 0);
res = unlink("testdir.enospc/rwfile"); assert(res == 0);
return status;
}
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