booster: seperate out the implementations of readdir and readdir64.

- readdir and readdir64 should not call same procedure booster_readdir
    in their implementation, since the layout of dirent structures returned by
    libc implementations of readdir and readdir64 is different (readdir returns
    struct dirent *, where as readdir64 returns struct dirent64 *).

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 333 (ls on paths not on virtual mounts report wrong directory contents)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=333

booster/src/booster.c

@@ -151,6 +151,7 @@ static int (*real_readlink) (const char *path, char *buf, size_t bufsize);
 static char * (*real_realpath) (const char *path, char *resolved);
 static DIR * (*real_opendir) (const char *path);
 static struct dirent * (*real_readdir) (DIR *dir);
+static struct dirent64 * (*real_readdir64) (DIR *dir);
 static int (*real_readdir_r) (DIR *dir, struct dirent *entry,
                               struct dirent **result);
 static int (*real_readdir64_r) (DIR *dir, struct dirent64 *entry,
@@ -1686,7 +1687,13 @@ out:
 }
 
 struct dirent *
-booster_readdir (DIR *dir)
+__REDIRECT (booster_false_readdir, (DIR *dir), readdir) __nonnull ((1));
+
+struct dirent64 *
+__REDIRECT (booster_false_readdir64, (DIR *dir), readdir64) __nonnull ((1));
+
+struct dirent *
+booster_false_readdir (DIR *dir)
 {
         struct booster_dir_handle       *bh = (struct booster_dir_handle *)dir;
         struct dirent                   *dirp = NULL;
@@ -1717,6 +1724,38 @@ out:
         return  dirp;
 }
 
+struct dirent64 *
+booster_false_readdir64 (DIR *dir)
+{
+        struct booster_dir_handle       *bh = (struct booster_dir_handle *)dir;
+        struct dirent64                 *dirp = NULL;
+
+        if (!bh) {
+                errno = EFAULT;
+                goto out;
+        }
+
+        if (bh->type == BOOSTER_GL_DIR) {
+                gf_log ("booster", GF_LOG_TRACE, "readdir on gluster");
+                dirp = glusterfs_readdir ((glusterfs_dir_t)bh->dirh);
+        } else if (bh->type == BOOSTER_POSIX_DIR) {
+                gf_log ("booster", GF_LOG_TRACE, "readdir on posix");
+                if (real_readdir == NULL) {
+                        errno = ENOSYS;
+                        dirp = NULL;
+                        goto out;
+                }
+
+                dirp = real_readdir64 ((DIR *)bh->dirh);
+        } else {
+                dirp = NULL;
+                errno = EINVAL;
+        }
+
+out:
+        return  dirp;
+}
+
 int
 closedir (DIR *dh)
 {
@@ -2696,6 +2735,7 @@ booster_lib_init (void)
         RESOLVE (realpath);
         RESOLVE (opendir);
         RESOLVE (readdir);
+        RESOLVE (readdir64);
         RESOLVE (closedir);
         RESOLVE (__xstat);
         RESOLVE (__xstat64);

booster/src/booster_stat.c

@@ -169,18 +169,6 @@ statvfs64 (const char *pathname, void *buf)
         return booster_statvfs64 (pathname, buf);
 }
 
-void *
-readdir (void *dir)
-{
-        return booster_readdir (dir);
-}
-
-void *
-readdir64 (void *dir)
-{
-        return booster_readdir (dir);
-}
-
 void
 rewinddir (void *dir)
 {

libglusterfsclient/src/libglusterfsclient.c

@@ -4141,7 +4141,7 @@ out:
 }
 
 
-struct dirent *
+void *
 glusterfs_readdir (glusterfs_dir_t dirfd)
 {
         int op_ret = -1;

libglusterfsclient/src/libglusterfsclient.h

@@ -633,7 +633,7 @@ glusterfs_rmdir (const char *path);
  * Returns the directory entry on success and NULL pointer on error
  * with errno set appropriately.
  */
-struct dirent *
+void *
 glusterfs_readdir (glusterfs_dir_t dirfd);