[Sheepdog] [PATCH 3/3] sheep: show error reason when SD_RES_EIO happens

[MORITA Kazutaka]

Signed-off-by: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
---
 sheep/store.c |   19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/sheep/store.c b/sheep/store.c
index 4b653e1..53e2db5 100644
--- a/sheep/store.c
+++ b/sheep/store.c
@@ -594,6 +594,7 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 
 		ret = ftruncate(fd, 0);
 		if (ret) {
+			eprintf("%m\n");
 			ret = SD_RES_EIO;
 			goto out;
 		}
@@ -626,8 +627,10 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 			if (ret != SD_DATA_OBJ_SIZE) {
 				if (errno == ENOSPC)
 					ret = SD_RES_NO_SPACE;
-				else
+				else {
+					eprintf("%m\n");
 					ret = SD_RES_EIO;
+				}
 				goto out;
 			}
 			free(buf);
@@ -648,8 +651,10 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 			if (ret != size) {
 				if (errno == ENOSPC)
 					ret = SD_RES_NO_SPACE;
-				else
+				else {
+					eprintf("%m\n");
 					ret = SD_RES_EIO;
+				}
 				goto out;
 			}
 		}
@@ -666,8 +671,10 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 		if (ret) {
 			if (errno == ENOENT)
 				ret = SD_RES_NO_OBJ;
-			else
+			else {
+				eprintf("%m\n");
 				ret = SD_RES_EIO;
+			}
 		}
 		break;
 	case SD_OP_READ_OBJ:
@@ -684,6 +691,7 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 
 		ret = pread64(fd, req->data, hdr->data_length, hdr->offset);
 		if (ret < 0) {
+			eprintf("%m\n");
 			ret = SD_RES_EIO;
 			goto out;
 		}
@@ -698,6 +706,7 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 		if (hdr->flags & SD_FLAG_CMD_TRUNCATE) {
 			ret = ftruncate(fd, hdr->offset + hdr->data_length);
 			if (ret) {
+				eprintf("%m\n");
 				ret = SD_RES_EIO;
 				goto out;
 			}
@@ -726,8 +735,10 @@ static int store_queue_request_local(struct request *req, uint32_t epoch)
 			if (ret != hdr->data_length) {
 				if (errno == ENOSPC)
 					ret = SD_RES_NO_SPACE;
-				else
+				else {
+					eprintf("%m\n");
 					ret = SD_RES_EIO;
+				}
 				goto out;
 			}
 		}
-- 
1.7.2.5