static void file_write(struct file_info *file, int fd)
{
off_t offset;
size_t size, actual;
unsigned seed;
int truncate = 0;
get_offset_and_size(file, &offset, &size);
seed = tests_random_no(10000000);
actual = file_write_data(file, fd, offset, size, seed);
if (offset + actual <= file->length && shrink)
/* 1 time in 100, when shrinking
truncate after the write */
if (tests_random_no(100) == 0)
truncate = 1;
if (actual != 0)
file_write_info(file, offset, actual, seed);
/* Delete errored files */
if (file->no_space_error) {
if (!file->deleted) {
struct fd_info *fdi;
fdi = file->fds;
while (fdi) {
file_close(fdi);
fdi = file->fds;
}
file_delete(file);
}
return;
}
if (truncate) {
size_t new_length = offset + actual;
if (file_ftruncate(file, fd, new_length))
file_truncate_info(file, new_length);
}
}
static void file_write(struct file_info *file, int fd)
{
off_t offset;
size_t size, actual;
unsigned seed;
int truncate = 0;
if (can_mmap && !full && !file->deleted && tests_random_no(100) == 1) {
file_mmap_write(file);
return;
}
get_offset_and_size(file, &offset, &size);
seed = tests_random_no(10000000);
actual = file_write_data(file, fd, offset, size, seed);
if (offset + actual <= file->length && shrink)
/* 1 time in 100, when shrinking
truncate after the write */
if (tests_random_no(100) == 0)
truncate = 1;
if (actual != 0)
file_write_info(file, offset, actual, seed);
/* Delete errored files */
if (!check_nospc_files && file->no_space_error) {
file_delete(file);
return;
}
if (truncate) {
size_t new_length = offset + actual;
if (file_ftruncate(file, fd, new_length))
file_truncate_info(file, new_length);
}
}
static void file_mmap_write(struct file_info *file)
{
size_t write_cnt = 0, r, i, len, size;
struct write_info *w = file->writes;
void *addr;
char *waddr;
off_t offs, offset;
unsigned seed;
uint64_t free_space;
int fd;
char *path;
if (!file->links)
return;
free_space = tests_get_free_space();
if (!free_space)
return;
/* Randomly pick a written area of the file */
if (!w)
return;
while (w) {
write_cnt += 1;
w = w->next;
}
r = tests_random_no(write_cnt);
w = file->writes;
for (i = 0; w && w->next && i < r; i++)
w = w->next;
offs = (w->offset / mem_page_size) * mem_page_size;
len = w->size + (w->offset - offs);
if (len > 1 << 24)
len = 1 << 24;
/* Open it */
path = dir_path(file->links->parent, file->links->name);
fd = open(path, O_RDWR);
CHECK(fd != -1);
free(path);
/* mmap it */
addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, offs);
CHECK(close(fd) != -1);
CHECK(addr != MAP_FAILED);
/* Randomly select a part of the mmapped area to write */
size = tests_random_no(w->size);
if (size > free_space)
size = free_space;
if (size == 0)
size = 1;
offset = w->offset + tests_random_no(w->size - size);
/* Write it */
seed = tests_random_no(10000000);
srand(seed);
waddr = addr + (offset - offs);
for (i = 0; i < size; i++)
waddr[i] = rand();
/* Unmap it */
CHECK(munmap(addr, len) != -1);
/* Record what was written */
file_write_info(file, offset, size, seed);
}
