pnfs-obj: define per-inode private structure

[karo-tx-linux.git] / fs / nfs / objlayout / objlayout.h

diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index 0814271bb9ba5f32dd2db0a96230c749bdf67af4..fa0262149f59c1d2927703e0c9ab62a981f5bc98 100644 (file)
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -45,6 +45,19 @@
 #include <linux/pnfs_osd_xdr.h>
 #include "../pnfs.h"
 
+/*
+ * per-inode layout
+ */
+struct objlayout {
+       struct pnfs_layout_hdr pnfs_layout;
+};
+
+static inline struct objlayout *
+OBJLAYOUT(struct pnfs_layout_hdr *lo)
+{
+       return container_of(lo, struct objlayout, pnfs_layout);
+}
+
 /*
  * Raid engine I/O API
  */
@@ -66,6 +79,10 @@ extern void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr);
 /*
  * exported generic objects function vectors
  */
+
+extern struct pnfs_layout_hdr *objlayout_alloc_layout_hdr(struct inode *, gfp_t gfp_flags);
+extern void objlayout_free_layout_hdr(struct pnfs_layout_hdr *);
+
 extern struct pnfs_layout_segment *objlayout_alloc_lseg(
        struct pnfs_layout_hdr *,
        struct nfs4_layoutget_res *,