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sbin/ggate/ggated/ggated.c

Show First 20 Lines • Show All 720 Lines • ▼ Show 20 Lines for (;;) {
} }
TAILQ_REMOVE(&inqueue, req, r_next); TAILQ_REMOVE(&inqueue, req, r_next);
error = pthread_mutex_unlock(&inqueue_mtx); error = pthread_mutex_unlock(&inqueue_mtx);
assert(error == 0); assert(error == 0);
/* /*
* Check the request. * Check the request.
*/ */
assert(req->r_cmd == GGATE_CMD_READ || req->r_cmd == GGATE_CMD_WRITE);
assert(req->r_offset + req->r_length <= (uintmax_t)conn->c_mediasize); assert(req->r_offset + req->r_length <= (uintmax_t)conn->c_mediasize);
assert((req->r_offset % conn->c_sectorsize) == 0); assert((req->r_offset % conn->c_sectorsize) == 0);
assert((req->r_length % conn->c_sectorsize) == 0); assert((req->r_length % conn->c_sectorsize) == 0);
g_gate_log(LOG_DEBUG, "%s: offset=%" PRIu64 " length=%" PRIu32, g_gate_log(LOG_DEBUG, "%s: offset=%" PRIu64 " length=%" PRIu32,
__func__, req->r_offset, req->r_length); __func__, req->r_offset, req->r_length);
/* /*
* Do the request. * Do the request.
*/ */
data = 0; data = 0;
switch (req->r_cmd) { switch (req->r_cmd) {
case GGATE_CMD_READ: case GGATE_CMD_READ:
data = pread(fd, req->r_data, req->r_length, data = pread(fd, req->r_data, req->r_length,
req->r_offset); req->r_offset);
break; break;
case GGATE_CMD_WRITE: case GGATE_CMD_WRITE:
data = pwrite(fd, req->r_data, req->r_length, data = pwrite(fd, req->r_data, req->r_length,
req->r_offset); req->r_offset);
/* Free data memory here - better sooner. */ /* Free data memory here - better sooner. */
free(req->r_data); free(req->r_data);
req->r_data = NULL; req->r_data = NULL;
break;
case GGATE_CMD_FLUSH:
data = fsync(fd);
jo_bruelltuete.comAuthorUnsubmitted
Done
Inline Actions

this seems prudent.
otherwise unsupported requests (like maybe flush or trim from a newer version of ggatec) would get EIO, but in a not so obvious way.

jo_bruelltuete.com: this seems prudent. otherwise unsupported requests (like maybe flush or trim from a newer…
if (data != 0)
req->r_error = errno;
break;
default:
g_gate_log(LOG_DEBUG, "Unsupported request: %i", req->r_cmd);
req->r_error = EOPNOTSUPP;
if (req->r_data != NULL) {
free(req->r_data);
req->r_data = NULL;
}
break; break;
} }
if (data != (ssize_t)req->r_length) { if (data != (ssize_t)req->r_length) {
/* Report short reads/writes as I/O errors. */ /* Report short reads/writes as I/O errors. */
if (errno == 0) if (errno == 0)
errno = EIO; errno = EIO;
g_gate_log(LOG_ERR, "Disk error: %s", strerror(errno)); g_gate_log(LOG_ERR, "Disk error: %s", strerror(errno));
req->r_error = errno; req->r_error = errno;
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