Linux 3.11 compat: fops->iterate()

[zfs.git] / include / sys / zpl.h

diff --git a/include/sys/zpl.h b/include/sys/zpl.h
index 61a57ef..89cf824 100644 (file)
--- a/include/sys/zpl.h
+++ b/include/sys/zpl.h
@@ -89,4 +89,63 @@ extern const struct inode_operations zpl_ops_snapdirs;
 extern const struct file_operations zpl_fops_shares;
 extern const struct inode_operations zpl_ops_shares;
 
+#ifdef HAVE_VFS_ITERATE
+
+#define DIR_CONTEXT_INIT(_dirent, _actor, _pos) {      \
+       .actor = _actor,                                \
+       .pos = _pos,                                    \
+}
+
+#else
+
+typedef struct dir_context {
+       void *dirent;
+       const filldir_t actor;
+       loff_t pos;
+} dir_context_t;
+
+#define DIR_CONTEXT_INIT(_dirent, _actor, _pos) {      \
+       .dirent = _dirent,                              \
+       .actor = _actor,                                \
+       .pos = _pos,                                    \
+}
+
+static inline bool
+dir_emit(struct dir_context *ctx, const char *name, int namelen,
+    uint64_t ino, unsigned type)
+{
+       return ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type) == 0;
+}
+
+static inline bool
+dir_emit_dot(struct file *file, struct dir_context *ctx)
+{
+       return ctx->actor(ctx->dirent, ".", 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->dirent, "..", 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 /* HAVE_VFS_ITERATE */
+
 #endif /* _SYS_ZPL_H */