uml/hostfs: Propagate dirent.d_type to filldir()

Currently the (optional) d_type member in struct dirent is always
DT_UNKNOWN on hostfs, which may confuse buggy software using readdir().
Make sure to propagate its value from the underlying filesystem if it's
available there.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>

3 files changed, 8 insertions, 4 deletions

diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 3cbfa93cd782..1fe731337f07 100644
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -67,7 +67,8 @@ extern int access_file(char *path, int r, int w, int x);
 extern int open_file(char *path, int r, int w, int append);
 extern void *open_dir(char *path, int *err_out);
 extern char *read_dir(void *stream, unsigned long long *pos,
-                      unsigned long long *ino_out, int *len_out);
+                      unsigned long long *ino_out, int *len_out,
+                      unsigned int *type_out);
 extern void close_file(void *stream);
 extern int replace_file(int oldfd, int fd);
 extern void close_dir(void *stream);
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index e130bd46d671..dc4222bd6e77 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -283,6 +283,7 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
         char *name;
         unsigned long long next, ino;
         int error, len;
+        unsigned int type;
 
         name = dentry_name(file->f_path.dentry);
         if (name == NULL)
@@ -292,9 +293,9 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
         if (dir == NULL)
                 return -error;
         next = file->f_pos;
-        while ((name = read_dir(dir, &next, &ino, &len)) != NULL) {
+        while ((name = read_dir(dir, &next, &ino, &len, &type)) != NULL) {
                 error = (*filldir)(ent, name, len, file->f_pos,
-                                   ino, DT_UNKNOWN);
+                                   ino, type);
                 if (error) break;
                 file->f_pos = next;
         }
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index dd7bc38a3825..a74ad0d371c2 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -98,7 +98,8 @@ void *open_dir(char *path, int *err_out)
 }
 
 char *read_dir(void *stream, unsigned long long *pos,
-               unsigned long long *ino_out, int *len_out)
+               unsigned long long *ino_out, int *len_out,
+               unsigned int *type_out)
 {
         DIR *dir = stream;
         struct dirent *ent;
@@ -109,6 +110,7 @@ char *read_dir(void *stream, unsigned long long *pos,
                 return NULL;
         *len_out = strlen(ent->d_name);
         *ino_out = ent->d_ino;
+        *type_out = ent->d_type;
         *pos = telldir(dir);
         return ent->d_name;
 }