- struct obd_import *imp;
- struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- void *ptr;
- int rc;
- ENTRY;
-
- LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
- req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
- LUSTRE_LOG_VERSION,
- LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
- if (req == NULL)
- GOTO(err_exit, rc =-ENOMEM);
-
- body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
- body->lgd_logid = loghandle->lgh_id;
- body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
- body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
- body->lgd_index = next_idx;
- body->lgd_saved_index = *cur_idx;
- body->lgd_len = len;
- body->lgd_cur_offset = *cur_offset;
-
- req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
- ptlrpc_request_set_replen(req);
- rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(out, rc);
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
- if (body == NULL)
- GOTO(out, rc =-EFAULT);
-
- /* The log records are swabbed as they are processed */
- ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
- if (ptr == NULL)
- GOTO(out, rc =-EFAULT);
-
- *cur_idx = body->lgd_saved_index;
- *cur_offset = body->lgd_cur_offset;
-
- memcpy(buf, ptr, len);
- EXIT;
+ struct obd_import *imp;
+ struct ptlrpc_request *req = NULL;
+ struct llogd_body *body;
+ void *ptr;
+ int rc;
+
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
+ LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
+ if (!req)
+ GOTO(err_exit, rc = -ENOMEM);
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ body->lgd_logid = loghandle->lgh_id;
+ body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
+ body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+ body->lgd_index = next_idx;
+ body->lgd_saved_index = *cur_idx;
+ body->lgd_len = len;
+ body->lgd_cur_offset = *cur_offset;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ /*
+ * -EIO has a special meaning here. If llog_osd_next_block()
+ * reaches the end of the log without finding the desired
+ * record then it updates *cur_offset and *cur_idx and returns
+ * -EIO. In llog_process_thread() we use this to detect
+ * EOF. But we must be careful to distinguish between -EIO
+ * coming from llog_osd_next_block() and -EIO coming from
+ * ptlrpc or below.
+ */
+ if (rc == -EIO) {
+ if (!req->rq_repmsg ||
+ lustre_msg_get_status(req->rq_repmsg) != -EIO)
+ GOTO(out, rc);
+ } else if (rc < 0) {
+ GOTO(out, rc);
+ }
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (!body)
+ GOTO(out, rc = -EFAULT);
+
+ *cur_idx = body->lgd_saved_index;
+ *cur_offset = body->lgd_cur_offset;
+
+ if (rc < 0)
+ GOTO(out, rc);
+
+ /* The log records are swabbed as they are processed */
+ ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+ if (!ptr)
+ GOTO(out, rc = -EFAULT);
+
+ memcpy(buf, ptr, len);
+ EXIT;