[Cluster-devel] [PATCH] libgfs2: Support the new dirent de_cookie field

[Andrew Price <anprice@redhat.com>]

Detect whether the new de_cookie field (kernel commit 471f3db27) is
present in struct gfs2_dirent in the configure script and update the
metadata description to support that field.

It also seems that meta.c was not using the GFS2_HAS_* defines from
clusterautoconfig.h and that was causing a unit test to fail with

    gfs2_dirent: __pad: offset is 28, expected 26
    gfs2_dirent: size mismatch between struct 40 and fields 38

This commit adds an #include to fix that.

Fixes Rawhide bz#1307532

Signed-off-by: Andrew Price <anprice@redhat.com>
---
 configure.ac          |  2 ++
 gfs2/libgfs2/meta.c   | 10 ++++++++--
 gfs2/libgfs2/ondisk.c | 21 ++++++++++++++++++---
 3 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index 130cb01..f6174ff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,6 +127,8 @@ AC_CHECK_MEMBER([struct gfs2_leaf.lf_inode],[AC_DEFINE([GFS2_HAS_LEAF_HINTS],[],
                 [], [[#include <linux/gfs2_ondisk.h>]])
 AC_CHECK_MEMBER([struct gfs2_dirent.de_rahead],[AC_DEFINE([GFS2_HAS_DE_RAHEAD],[],[Dirent readahead field])],
                 [], [[#include <linux/gfs2_ondisk.h>]])
+AC_CHECK_MEMBER([struct gfs2_dirent.de_cookie],[AC_DEFINE([GFS2_HAS_DE_COOKIE],[],[Dirent cookie field])],
+                [], [[#include <linux/gfs2_ondisk.h>]])
 
 # *FLAGS handling
 ENV_CFLAGS="$CFLAGS"
diff --git a/gfs2/libgfs2/meta.c b/gfs2/libgfs2/meta.c
index 4f43af5..90d5647 100644
--- a/gfs2/libgfs2/meta.c
+++ b/gfs2/libgfs2/meta.c
@@ -1,6 +1,7 @@
 #include <stdint.h>
 #include <string.h>
 #include "libgfs2.h"
+#include "clusterautoconfig.h"
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 #define SYM(x) { x, #x },
@@ -430,10 +431,15 @@ F(de_name_len, .flags = LGFS2_MFF_BYTES)
 F(de_type)
 #ifdef GFS2_HAS_DE_RAHEAD
 F(de_rahead)
-RF(__pad2)
+#ifdef GFS2_HAS_DE_COOKIE
+F(de_cookie)
+RF(pad3)
+#else
+RF(pad2)
+#endif /* GFS2_HAS_DE_COOKIE */
 #else
 RF(__pad)
-#endif
+#endif /* GFS2_HAS_DE_RAHEAD */
 };
 
 #undef STRUCT
diff --git a/gfs2/libgfs2/ondisk.c b/gfs2/libgfs2/ondisk.c
index b9418c5..ea1f61f 100644
--- a/gfs2/libgfs2/ondisk.c
+++ b/gfs2/libgfs2/ondisk.c
@@ -417,7 +417,15 @@ void gfs2_dirent_in(struct gfs2_dirent *de, char *buf)
 	CPIN_16(de, str, de_type);
 #ifdef GFS2_HAS_DE_RAHEAD
 	CPIN_16(de, str, de_rahead);
-#endif
+#ifdef GFS2_HAS_DE_COOKIE
+	CPIN_32(de, str, de_cookie);
+	CPIN_08(de, str, pad3, 8);
+#else
+	CPIN_08(de, str, pad2, 12);
+#endif /* GFS2_HAS_DE_COOKIE */
+#else
+	CPIN_08(de, str, __pad, 14);
+#endif /* GFS2_HAS_DE_RAHEAD */
 }
 
 void gfs2_dirent_out(struct gfs2_dirent *de, char *buf)
@@ -429,10 +437,17 @@ void gfs2_dirent_out(struct gfs2_dirent *de, char *buf)
 	CPOUT_16(de, str, de_rec_len);
 	CPOUT_16(de, str, de_name_len);
 	CPOUT_16(de, str, de_type);
-	memset(str->__pad, 0, sizeof(str->__pad));
 #ifdef GFS2_HAS_DE_RAHEAD
 	CPOUT_16(de, str, de_rahead);
-#endif
+#ifdef GFS2_HAS_DE_COOKIE
+	CPOUT_32(de, str, de_cookie);
+	CPOUT_08(de, str, pad3, 8);
+#else
+	CPOUT_08(de, str, pad2, 12);
+#endif /* GFS2_HAS_DE_COOKIE */
+#else
+	CPOUT_08(de, str, __pad, 14);
+#endif /* GFS2_HAS_DE_RAHEAD */
 }
 
 void gfs2_leaf_in(struct gfs2_leaf *lf, struct gfs2_buffer_head *bh)
-- 
2.4.3