[readdir] switch dcache_readdir() users to ->iterate()

new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx),
dir_emit_dots(file, ctx).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 32 insertions, 7 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b9641ae68da8..40293a6ce804 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1511,12 +1511,6 @@ struct dir_context {
         loff_t pos;
 };
 
-static inline bool dir_emit(struct dir_context *ctx,
-                            const char *name, int namelen,
-                            u64 ino, unsigned type)
-{
-        return ctx->actor(ctx, name, namelen, ctx->pos, ino, type) == 0;
-}
 struct block_device_operations;
 
 /* These macros are for out of kernel modules to test that
@@ -2537,7 +2531,7 @@ extern void iterate_supers_type(struct file_system_type *,
 extern int dcache_dir_open(struct inode *, struct file *);
 extern int dcache_dir_close(struct inode *, struct file *);
 extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
-extern int dcache_readdir(struct file *, void *, filldir_t);
+extern int dcache_readdir(struct file *, struct dir_context *);
 extern int simple_setattr(struct dentry *, struct iattr *);
 extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 extern int simple_statfs(struct dentry *, struct kstatfs *);
@@ -2701,4 +2695,35 @@ static inline void inode_has_no_xattr(struct inode *inode)
                 inode->i_flags |= S_NOSEC;
 }
 
+static inline bool dir_emit(struct dir_context *ctx,
+                            const char *name, int namelen,
+                            u64 ino, unsigned type)
+{
+        return ctx->actor(ctx, name, namelen, ctx->pos, ino, type) == 0;
+}
+static inline bool dir_emit_dot(struct file *file, struct dir_context *ctx)
+{
+        return ctx->actor(ctx, ".", 1, ctx->pos,
+                          file->f_path.dentry->d_inode->i_ino, DT_DIR) == 0;
+}
+static inline bool dir_emit_dotdot(struct file *file, struct dir_context *ctx)
+{
+        return ctx->actor(ctx, "..", 2, ctx->pos,
+                          parent_ino(file->f_path.dentry), DT_DIR) == 0;
+}
+static inline bool dir_emit_dots(struct file *file, struct dir_context *ctx)
+{
+        if (ctx->pos == 0) {
+                if (!dir_emit_dot(file, ctx))
+                        return false;
+                ctx->pos = 1;
+        }
+        if (ctx->pos == 1) {
+                if (!dir_emit_dotdot(file, ctx))
+                        return false;
+                ctx->pos = 2;
+        }
+        return true;
+}
+
 #endif /* _LINUX_FS_H */