erofs-utils: lib: add erofs_inode_is_whiteout() helper
Add erofs_inode_is_whiteout() helper to check if a given inode is
a whiteout.
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230909163240.42057-4-hsiangkao@linux.alibaba.com
diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index 382024a..ac82336 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -20,6 +20,7 @@
#include "erofs_fs.h"
#include <fcntl.h>
#include <sys/types.h> /* for off_t definition */
+#include <sys/stat.h> /* for S_ISCHR definition */
#include <stdio.h>
#ifndef PATH_MAX
@@ -423,6 +424,12 @@
return crc;
}
+#define EROFS_WHITEOUT_DEV 0
+static inline bool erofs_inode_is_whiteout(struct erofs_inode *inode)
+{
+ return S_ISCHR(inode->i_mode) && inode->u.i_rdev == EROFS_WHITEOUT_DEV;
+}
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/tar.c b/lib/tar.c
index 5b63cf5..c5dbef0 100644
--- a/lib/tar.c
+++ b/lib/tar.c
@@ -19,8 +19,6 @@
#include "erofs/xattr.h"
#include "erofs/blobchunk.h"
-#define EROFS_WHITEOUT_DEV 0
-
static char erofs_libbuf[16384];
struct tar_header {
