static int scrub_write_progress(pthread_mutex_t *m, const char *fsid,
struct scrub_progress *data, int n)
{
int ret;
int err;
int fd = -1;
int old;
ret = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old);
if (ret) {
err = -ret;
goto out3;
}
ret = pthread_mutex_lock(m);
if (ret) {
err = -ret;
goto out2;
}
fd = scrub_open_file_w(SCRUB_DATA_FILE, fsid, "tmp");
if (fd < 0) {
err = fd;
goto out1;
}
err = scrub_write_file(fd, fsid, data, n);
if (err)
goto out1;
err = scrub_rename_file(SCRUB_DATA_FILE, fsid, "tmp");
if (err)
goto out1;
out1:
if (fd >= 0) {
ret = close(fd);
if (ret)
err = -errno;
}
ret = pthread_mutex_unlock(m);
if (ret && !err)
err = -ret;
out2:
ret = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old);
if (ret && !err)
err = -ret;
out3:
return err;
}
/* nb: returns a negative errno via ERR_PTR */
static void *scrub_progress_cycle(void *ctx)
{
int ret;
int perr = 0; /* positive / pthread error returns */
int old;
int i;
char fsid[37];
struct scrub_progress *sp;
struct scrub_progress *sp_last;
struct scrub_progress *sp_shared;
struct timeval tv;
struct scrub_progress_cycle *spc = ctx;
int ndev = spc->fi->num_devices;
int this = 1;
int last = 0;
int peer_fd = -1;
struct pollfd accept_poll_fd = {
.fd = spc->prg_fd,
.events = POLLIN,
.revents = 0,
};
struct pollfd write_poll_fd = {
.events = POLLOUT,
.revents = 0,
};
struct sockaddr_un peer;
socklen_t peer_size = sizeof(peer);
perr = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old);
if (perr)
goto out;
uuid_unparse(spc->fi->fsid, fsid);
for (i = 0; i < ndev; ++i) {
sp = &spc->progress[i];
sp_last = &spc->progress[i + ndev];
sp_shared = &spc->shared_progress[i];
sp->scrub_args.devid = sp_last->scrub_args.devid =
sp_shared->scrub_args.devid;
sp->fd = sp_last->fd = spc->fdmnt;
sp->stats.t_start = sp_last->stats.t_start =
sp_shared->stats.t_start;
sp->resumed = sp_last->resumed = sp_shared->resumed;
sp->skip = sp_last->skip = sp_shared->skip;
sp->stats.finished = sp_last->stats.finished =
sp_shared->stats.finished;
}
while (1) {
ret = poll(&accept_poll_fd, 1, 5 * 1000);
if (ret == -1) {
ret = -errno;
goto out;
}
if (ret)
peer_fd = accept(spc->prg_fd, (struct sockaddr *)&peer,
&peer_size);
gettimeofday(&tv, NULL);
this = (this + 1)%2;
last = (last + 1)%2;
for (i = 0; i < ndev; ++i) {
sp = &spc->progress[this * ndev + i];
sp_last = &spc->progress[last * ndev + i];
sp_shared = &spc->shared_progress[i];
if (sp->stats.finished)
continue;
progress_one_dev(sp);
sp->stats.duration = tv.tv_sec - sp->stats.t_start;
if (!sp->ret)
continue;
if (sp->ioctl_errno != ENOTCONN &&
sp->ioctl_errno != ENODEV) {
ret = -sp->ioctl_errno;
goto out;
}
/*
* scrub finished or device removed, check the
* finished flag. if unset, just use the last
* result we got for the current write and go
* on. flag should be set on next cycle, then.
*/
perr = pthread_mutex_lock(&sp_shared->progress_mutex);
if (perr)
goto out;
if (!sp_shared->stats.finished) {
perr = pthread_mutex_unlock(
&sp_shared->progress_mutex);
if (perr)
goto out;
memcpy(sp, sp_last, sizeof(*sp));
continue;
}
perr = pthread_mutex_unlock(&sp_shared->progress_mutex);
if (perr)
goto out;
memcpy(sp, sp_shared, sizeof(*sp));
memcpy(sp_last, sp_shared, sizeof(*sp));
}
if (peer_fd != -1) {
write_poll_fd.fd = peer_fd;
ret = poll(&write_poll_fd, 1, 0);
if (ret == -1) {
ret = -errno;
goto out;
}
if (ret) {
ret = scrub_write_file(
peer_fd, fsid,
&spc->progress[this * ndev], ndev);
if (ret)
goto out;
}
close(peer_fd);
peer_fd = -1;
}
if (!spc->do_record)
continue;
ret = scrub_write_progress(spc->write_mutex, fsid,
&spc->progress[this * ndev], ndev);
if (ret)
goto out;
}
out:
if (peer_fd != -1)
close(peer_fd);
if (perr)
ret = -perr;
return ERR_PTR(ret);
}
static struct scrub_file_record *last_dev_scrub(
struct scrub_file_record *const *const past_scrubs, u64 devid)
{
int i;
if (!past_scrubs || IS_ERR(past_scrubs))
return NULL;
for (i = 0; past_scrubs[i]; ++i)
if (past_scrubs[i]->devid == devid)
return past_scrubs[i];
return NULL;
}
int mkdir_p(char *path)
{
int i;
int ret;
for (i = 1; i < strlen(path); ++i) {
if (path[i] != '/')
continue;
path[i] = '\0';
ret = mkdir(path, 0777);
if (ret && errno != EEXIST)
return 1;
path[i] = '/';
}
return 0;
}
