@@ -32,7 +32,7 @@
#include <linux/module.h>
#include <linux/init.h>
-#include "../pnfs.h"
+#include "blocklayout.h"
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
@@ -53,15 +53,49 @@ bl_write_pagelist(struct nfs_write_data *wdata,
return PNFS_NOT_ATTEMPTED;
}
+/* STUB */
static void
-bl_free_layout_hdr(struct pnfs_layout_hdr *lo)
+release_extents(struct pnfs_block_layout *bl,
+ struct pnfs_layout_range *range)
{
+ return;
}
-static struct pnfs_layout_hdr *
-bl_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
+/* STUB */
+static void
+release_inval_marks(struct pnfs_inval_markings *marks)
{
- return NULL;
+ return;
+}
+
+static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo)
+{
+ struct pnfs_block_layout *bl = BLK_LO2EXT(lo);
+
+ dprintk("%s enter\n", __func__);
+ release_extents(bl, NULL);
+ release_inval_marks(&bl->bl_inval);
+ kfree(bl);
+}
+
+static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode,
+ gfp_t gfp_flags)
+{
+ struct pnfs_block_layout *bl;
+
+ dprintk("%s enter\n", __func__);
+ bl = kzalloc(sizeof(*bl), gfp_flags);
+ if (!bl)
+ return NULL;
+ spin_lock_init(&bl->bl_ext_lock);
+ INIT_LIST_HEAD(&bl->bl_extents[0]);
+ INIT_LIST_HEAD(&bl->bl_extents[1]);
+ INIT_LIST_HEAD(&bl->bl_commit);
+ INIT_LIST_HEAD(&bl->bl_committing);
+ bl->bl_count = 0;
+ bl->bl_blocksize = NFS_SERVER(inode)->pnfs_blksize >> 9;
+ INIT_INVAL_MARKS(&bl->bl_inval, bl->bl_blocksize);
+ return &bl->bl_layout;
}
static void
new file mode 100644
@@ -0,0 +1,90 @@
+/*
+ * linux/fs/nfs/blocklayout/blocklayout.h
+ *
+ * Module for the NFSv4.1 pNFS block layout driver.
+ *
+ * Copyright (c) 2006 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Andy Adamson <andros@citi.umich.edu>
+ * Fred Isaman <iisaman@umich.edu>
+ *
+ * permission is granted to use, copy, create derivative works and
+ * redistribute this software and such derivative works for any purpose,
+ * so long as the name of the university of michigan is not used in
+ * any advertising or publicity pertaining to the use or distribution
+ * of this software without specific, written prior authorization. if
+ * the above copyright notice or any other identification of the
+ * university of michigan is included in any copy of any portion of
+ * this software, then the disclaimer below must also be included.
+ *
+ * this software is provided as is, without representation from the
+ * university of michigan as to its fitness for any purpose, and without
+ * warranty by the university of michigan of any kind, either express
+ * or implied, including without limitation the implied warranties of
+ * merchantability and fitness for a particular purpose. the regents
+ * of the university of michigan shall not be liable for any damages,
+ * including special, indirect, incidental, or consequential damages,
+ * with respect to any claim arising out or in connection with the use
+ * of the software, even if it has been or is hereafter advised of the
+ * possibility of such damages.
+ */
+#ifndef FS_NFS_NFS4BLOCKLAYOUT_H
+#define FS_NFS_NFS4BLOCKLAYOUT_H
+
+#include <linux/nfs_fs.h>
+#include "../pnfs.h"
+
+enum exstate4 {
+ PNFS_BLOCK_READWRITE_DATA = 0,
+ PNFS_BLOCK_READ_DATA = 1,
+ PNFS_BLOCK_INVALID_DATA = 2, /* mapped, but data is invalid */
+ PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */
+};
+
+struct pnfs_inval_markings {
+ /* STUB */
+};
+
+/* sector_t fields are all in 512-byte sectors */
+struct pnfs_block_extent {
+ struct kref be_refcnt;
+ struct list_head be_node; /* link into lseg list */
+ struct nfs4_deviceid be_devid; /* STUB - remevable??? */
+ struct block_device *be_mdev;
+ sector_t be_f_offset; /* the starting offset in the file */
+ sector_t be_length; /* the size of the extent */
+ sector_t be_v_offset; /* the starting offset in the volume */
+ enum exstate4 be_state; /* the state of this extent */
+ struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */
+};
+
+static inline void
+INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize)
+{
+ /* STUB */
+}
+
+enum extentclass4 {
+ RW_EXTENT = 0, /* READWRTE and INVAL */
+ RO_EXTENT = 1, /* READ and NONE */
+ EXTENT_LISTS = 2,
+};
+
+struct pnfs_block_layout {
+ struct pnfs_layout_hdr bl_layout;
+ struct pnfs_inval_markings bl_inval; /* tracks INVAL->RW transition */
+ spinlock_t bl_ext_lock; /* Protects list manipulation */
+ struct list_head bl_extents[EXTENT_LISTS]; /* R and RW extents */
+ struct list_head bl_commit; /* Needs layout commit */
+ struct list_head bl_committing; /* Layout committing */
+ unsigned int bl_count; /* entries in bl_commit */
+ sector_t bl_blocksize; /* Server blocksize in sectors */
+};
+
+static inline struct pnfs_block_layout *BLK_LO2EXT(struct pnfs_layout_hdr *lo)
+{
+ return container_of(lo, struct pnfs_block_layout, bl_layout);
+}
+
+#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */