core: make compute_cksum function op_version compatible

Problem: commit 5a152a changed the mechansim of computing the
checksum. In heterogeneous cluster, peers are running into
rejected state because we have different cksum computation
mechansims in upgraded and non-upgraded nodes.

Solution: add a check for op-version so that all the nodes
in the cluster follow the same mechanism for computing the
cksum.

fixes: bz#1684029

> Change-Id: I1508f000e8c9895588b6011b8b6cc0eda7102193
> BUG: bz#1685120
> Signed-off-by: Sanju Rakonde <srakonde@redhat.com>
> (cherry picked from commit 073444b693b7a91c42963512e0fdafb57ad46670)

Change-Id: I1508f000e8c9895588b6011b8b6cc0eda7102193

3 files changed, 14 insertions, 7 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index 2a74d7bf239..e312b104747 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -49,6 +49,7 @@
 #include "glusterfs/lkowner.h"
 #include "glusterfs/syscall.h"
 #include "cli1-xdr.h"
+#include "glusterfs/globals.h"
 #define XXH_INLINE_ALL
 #include "xxhash.h"
 #include <ifaddrs.h>
@@ -2002,7 +2003,7 @@ compute_checksum(char *buf, const ssize_t size, uint32_t *checksum)
 #define GF_CHECKSUM_BUF_SIZE 1024
 
 int
-get_checksum_for_file(int fd, uint32_t *checksum)
+get_checksum_for_file(int fd, uint32_t *checksum, int op_version)
 {
     int ret = -1;
     char buf[GF_CHECKSUM_BUF_SIZE] = {
@@ -2013,8 +2014,12 @@ get_checksum_for_file(int fd, uint32_t *checksum)
     sys_lseek(fd, 0L, SEEK_SET);
     do {
         ret = sys_read(fd, &buf, GF_CHECKSUM_BUF_SIZE);
-        if (ret > 0)
-            compute_checksum(buf, ret, checksum);
+        if (ret > 0) {
+            if (op_version < GD_OP_VERSION_5_4)
+                compute_checksum(buf, GF_CHECKSUM_BUF_SIZE, checksum);
+            else
+                compute_checksum(buf, ret, checksum);
+        }
     } while (ret > 0);
 
     /* set it back */
@@ -2024,7 +2029,7 @@ get_checksum_for_file(int fd, uint32_t *checksum)
 }
 
 int
-get_checksum_for_path(char *path, uint32_t *checksum)
+get_checksum_for_path(char *path, uint32_t *checksum, int op_version)
 {
     int ret = -1;
     int fd = -1;
@@ -2040,7 +2045,7 @@ get_checksum_for_path(char *path, uint32_t *checksum)
         goto out;
     }
 
-    ret = get_checksum_for_file(fd, checksum);
+    ret = get_checksum_for_file(fd, checksum, op_version);
 
 out:
     if (fd != -1)
diff --git a/libglusterfs/src/glusterfs/common-utils.h b/libglusterfs/src/glusterfs/common-utils.h
index f03d2c1049a..0e2ecc73af1 100644
--- a/libglusterfs/src/glusterfs/common-utils.h
+++ b/libglusterfs/src/glusterfs/common-utils.h
@@ -833,12 +833,12 @@ int
 gf_unlockfd(int fd);
 
 int
-get_checksum_for_file(int fd, uint32_t *checksum);
+get_checksum_for_file(int fd, uint32_t *checksum, int op_version);
 int
 log_base2(unsigned long x);
 
 int
-get_checksum_for_path(char *path, uint32_t *checksum);
+get_checksum_for_path(char *path, uint32_t *checksum, int op_version);
 int
 get_file_mtime(const char *path, time_t *stamp);
 char *
diff --git a/libglusterfs/src/glusterfs/globals.h b/libglusterfs/src/glusterfs/globals.h
index 9a2f5324afc..8d898c3abf4 100644
--- a/libglusterfs/src/glusterfs/globals.h
+++ b/libglusterfs/src/glusterfs/globals.h
@@ -111,6 +111,8 @@
 
 #define GD_OP_VERSION_5_0 50000 /* Op-version for GlusterFS 5.0 */
 
+#define GD_OP_VERSION_5_4 50400 /* Op-version for GlusterFS 5.4 */
+
 #define GD_OP_VERSION_6_0 60000 /* Op-version for GlusterFS 6.0 */
 
 #define GD_OP_VER_PERSISTENT_AFR_XATTRS GD_OP_VERSION_3_6_0