9pfs: move qemu_dirent_dup() from osdep -> 9p-util

Function qemu_dirent_dup() is currently only used by 9pfs server, so move
it from project global header osdep.h to 9pfs specific header 9p-util.h.

Link: https://lore.kernel.org/qemu-devel/CAFEAcA_=HAUNomKD2wurSVaAHa5mrk22A1oHKLWUDjk7v6Khmg@mail.gmail.com/
Based-on: <20220227223522.91937-12-wwcohen@gmail.com>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <E1nP9Oz-00043L-KJ@lizzy.crudebyte.com>

3 files changed, 30 insertions, 34 deletions

diff --git a/hw/9pfs/9p-util.h b/hw/9pfs/9p-util.h
index 73b08c5..408d71c 100644
--- a/hw/9pfs/9p-util.h
+++ b/hw/9pfs/9p-util.h
@@ -114,6 +114,36 @@ static inline off_t qemu_dirent_off(struct dirent *dent)
 #endif
 }
 
+/**
+ * Duplicate directory entry @dent.
+ *
+ * It is highly recommended to use this function instead of open coding
+ * duplication of @c dirent objects, because the actual @c struct @c dirent
+ * size may be bigger or shorter than @c sizeof(struct dirent) and correct
+ * handling is platform specific (see gitlab issue #841).
+ *
+ * @dent - original directory entry to be duplicated
+ * @returns duplicated directory entry which should be freed with g_free()
+ */
+static inline struct dirent *qemu_dirent_dup(struct dirent *dent)
+{
+    size_t sz = 0;
+#if defined _DIRENT_HAVE_D_RECLEN
+    /* Avoid use of strlen() if platform supports d_reclen. */
+    sz = dent->d_reclen;
+#endif
+    /*
+     * Test sz for zero even if d_reclen is available
+     * because some drivers may set d_reclen to zero.
+     */
+    if (sz == 0) {
+        /* Fallback to the most portable way. */
+        sz = offsetof(struct dirent, d_name) +
+                      strlen(dent->d_name) + 1;
+    }
+    return g_memdup(dent, sz);
+}
+
 /*
  * As long as mknodat is not available on macOS, this workaround
  * using pthread_fchdir_np is needed. qemu_mknodat is defined in
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 7bcce3b..650ba1a 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -673,19 +673,6 @@ static inline int platform_does_not_support_system(const char *command)
 }
 #endif /* !HAVE_SYSTEM_FUNCTION */
 
-/**
- * Duplicate directory entry @dent.
- *
- * It is highly recommended to use this function instead of open coding
- * duplication of @c dirent objects, because the actual @c struct @c dirent
- * size may be bigger or shorter than @c sizeof(struct dirent) and correct
- * handling is platform specific (see gitlab issue #841).
- *
- * @dent - original directory entry to be duplicated
- * @returns duplicated directory entry which should be freed with g_free()
- */
-struct dirent *qemu_dirent_dup(struct dirent *dent);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/util/osdep.c b/util/osdep.c
index 723cdcb..7c4deda 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -33,7 +33,6 @@
 extern int madvise(char *, size_t, int);
 #endif
 
-#include <dirent.h>
 #include "qemu-common.h"
 #include "qemu/cutils.h"
 #include "qemu/sockets.h"
@@ -619,23 +618,3 @@ writev(int fd, const struct iovec *iov, int iov_cnt)
     return readv_writev(fd, iov, iov_cnt, true);
 }
 #endif
-
-struct dirent *
-qemu_dirent_dup(struct dirent *dent)
-{
-    size_t sz = 0;
-#if defined _DIRENT_HAVE_D_RECLEN
-    /* Avoid use of strlen() if platform supports d_reclen. */
-    sz = dent->d_reclen;
-#endif
-    /*
-     * Test sz for zero even if d_reclen is available
-     * because some drivers may set d_reclen to zero.
-     */
-    if (sz == 0) {
-        /* Fallback to the most portable way. */
-        sz = offsetof(struct dirent, d_name) +
-                      strlen(dent->d_name) + 1;
-    }
-    return g_memdup(dent, sz);
-}