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From: Jim Rees <rees@umich.edu>
To: linux-nfs@vger.kernel.org
Cc: peter honeyman <honey@citi.umich.edu>
Subject: [PATCH 08/34] pnfsblock: blocklayout stub
Date: Sun, 12 Jun 2011 19:44:05 -0400
Message-ID: <f936643b0b4fa40d8ee140a087a2947e54253223.1307921138.git.rees@umich.edu> (raw)
In-Reply-To: <cover.1307921137.git.rees@umich.edu>

From: Fred Isaman <iisaman@citi.umich.edu>

Adds the minimal structure for a pnfs block layout driver,
with all function pointers aimed at stubs.

[pnfsblock: SQUASHME: port block layout code]
Signed-off-by: Peng Tao <peng_tao@emc.com>
[pnfsblock: SQUASHME: adjust to API change]
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
[pnfs: move pnfs_layout_type inline in nfs_inode]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[blocklayout: encode_layoutcommit implementation]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
---
 fs/nfs/blocklayout/Makefile      |    4 +-
 fs/nfs/blocklayout/blocklayout.c |  166 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 168 insertions(+), 2 deletions(-)
 create mode 100644 fs/nfs/blocklayout/blocklayout.c

diff --git a/fs/nfs/blocklayout/Makefile b/fs/nfs/blocklayout/Makefile
index f214c1c..6bf49cd 100644
--- a/fs/nfs/blocklayout/Makefile
+++ b/fs/nfs/blocklayout/Makefile
@@ -1,5 +1,5 @@
 #
 # Makefile for the pNFS block layout driver kernel module
 #
-obj-$(CONFIG_PNFS_BLOCK) +=
-blocklayoutdriver-objs :=
+obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
+blocklayoutdriver-objs := blocklayout.o
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
new file mode 100644
index 0000000..2e0d41a
--- /dev/null
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -0,0 +1,166 @@
+/*
+ *  linux/fs/nfs/blocklayout/blocklayout.c
+ *
+ *  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.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "../pnfs.h"
+
+#define NFSDBG_FACILITY         NFSDBG_PNFS_LD
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Andy Adamson <andros@citi.umich.edu>");
+MODULE_DESCRIPTION("The NFSv4.1 pNFS Block layout driver");
+
+static enum pnfs_try_status
+bl_read_pagelist(struct nfs_read_data *rdata)
+{
+	return PNFS_NOT_ATTEMPTED;
+}
+
+static enum pnfs_try_status
+bl_write_pagelist(struct nfs_write_data *wdata,
+		  int sync)
+{
+	return PNFS_NOT_ATTEMPTED;
+}
+
+static void
+bl_free_layout_hdr(struct pnfs_layout_hdr *lo)
+{
+}
+
+static struct pnfs_layout_hdr *
+bl_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
+{
+	return NULL;
+}
+
+static void
+bl_free_lseg(struct pnfs_layout_segment *lseg)
+{
+}
+
+static struct pnfs_layout_segment *
+bl_alloc_lseg(struct pnfs_layout_hdr *lo,
+	      struct nfs4_layoutget_res *lgr, gfp_t gfp_flags)
+{
+	return NULL;
+}
+
+static void
+bl_encode_layoutcommit(struct pnfs_layout_hdr *lo, struct xdr_stream *xdr,
+		       const struct nfs4_layoutcommit_args *arg)
+{
+}
+
+static void
+bl_cleanup_layoutcommit(struct pnfs_layout_hdr *lo,
+			struct nfs4_layoutcommit_data *lcdata)
+{
+}
+
+static int
+bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh)
+{
+	dprintk("%s enter\n", __func__);
+	return 0;
+}
+
+static int
+bl_clear_layoutdriver(struct nfs_server *server)
+{
+	dprintk("%s enter\n", __func__);
+	return 0;
+}
+
+static int
+bl_write_begin(struct pnfs_layout_segment *lseg, struct page *page, loff_t pos,
+	       unsigned count, struct pnfs_fsdata *fsdata)
+{
+	return 0;
+}
+
+static int
+bl_write_end(struct inode *inode, struct page *page, loff_t pos,
+	     unsigned count, unsigned copied, struct pnfs_layout_segment *lseg)
+{
+	return 0;
+}
+
+/* Return any memory allocated to fsdata->private, and take advantage
+ * of no page locks to mark pages noted in write_begin as needing
+ * initialization.
+ */
+static void
+bl_write_end_cleanup(struct file *filp, struct pnfs_fsdata *fsdata)
+{
+}
+
+static struct pnfs_layoutdriver_type blocklayout_type = {
+	.id = LAYOUT_BLOCK_VOLUME,
+	.name = "LAYOUT_BLOCK_VOLUME",
+	.read_pagelist			= bl_read_pagelist,
+	.write_pagelist			= bl_write_pagelist,
+	.write_begin			= bl_write_begin,
+	.write_end			= bl_write_end,
+	.write_end_cleanup		= bl_write_end_cleanup,
+	.alloc_layout_hdr		= bl_alloc_layout_hdr,
+	.free_layout_hdr		= bl_free_layout_hdr,
+	.alloc_lseg			= bl_alloc_lseg,
+	.free_lseg			= bl_free_lseg,
+	.encode_layoutcommit		= bl_encode_layoutcommit,
+	.cleanup_layoutcommit		= bl_cleanup_layoutcommit,
+	.set_layoutdriver		= bl_set_layoutdriver,
+	.clear_layoutdriver		= bl_clear_layoutdriver,
+	.pg_test                        = pnfs_generic_pg_test,
+};
+
+static int __init nfs4blocklayout_init(void)
+{
+	int ret;
+
+	dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__);
+
+	ret = pnfs_register_layoutdriver(&blocklayout_type);
+	return ret;
+}
+
+static void __exit nfs4blocklayout_exit(void)
+{
+	dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n",
+	       __func__);
+
+	pnfs_unregister_layoutdriver(&blocklayout_type);
+}
+
+module_init(nfs4blocklayout_init);
+module_exit(nfs4blocklayout_exit);
-- 
1.7.4.1


  parent reply index

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-12 23:43 [PATCH 00/34] pnfs block layout driver based on v3.0-rc2 Jim Rees
2011-06-12 23:43 ` [PATCH 01/34] pnfs: GETDEVICELIST Jim Rees
2011-06-12 23:43 ` [PATCH 02/34] pnfs: add set-clear layoutdriver interface Jim Rees
2011-06-12 23:43 ` [PATCH 03/34] pnfs: let layoutcommit code handle multiple segments Jim Rees
2011-06-13 14:36   ` Fred Isaman
2011-06-14 10:40     ` tao.peng
2011-06-14 13:58       ` Fred Isaman
2011-06-14 14:28       ` Benny Halevy
2011-06-12 23:43 ` [PATCH 04/34] pnfs: hook nfs_write_begin/end to allow layout driver manipulation Jim Rees
2011-06-13 14:44   ` Fred Isaman
2011-06-14 11:01     ` tao.peng
2011-06-14 14:05       ` Fred Isaman
2011-06-14 15:53         ` Peng Tao
2011-06-14 16:02           ` Fred Isaman
2011-06-12 23:43 ` [PATCH 05/34] pnfs: ask for layout_blksize and save it in nfs_server Jim Rees
2011-06-14 15:01   ` Benny Halevy
2011-06-14 15:08     ` Peng Tao
2011-06-12 23:44 ` [PATCH 06/34] pnfs: cleanup_layoutcommit Jim Rees
2011-06-13 21:19   ` Benny Halevy
2011-06-14 15:16     ` Peng Tao
2011-06-14 15:10   ` Benny Halevy
2011-06-14 15:21     ` Peng Tao
2011-06-14 15:19   ` Benny Halevy
2011-06-12 23:44 ` [PATCH 07/34] pnfsblock: define PNFS_BLOCK Kconfig option Jim Rees
2011-06-14 15:13   ` Benny Halevy
2011-06-12 23:44 ` Jim Rees [this message]
2011-06-12 23:44 ` [PATCH 09/34] pnfsblock: layout alloc and free Jim Rees
2011-06-12 23:44 ` [PATCH 10/34] Add support for simple rpc pipefs Jim Rees
2011-06-12 23:44 ` [PATCH 11/34] pnfs-block: Add block device discovery pipe Jim Rees
2011-06-12 23:44 ` [PATCH 12/34] pnfsblock: basic extent code Jim Rees
2011-06-12 23:44 ` [PATCH 13/34] pnfsblock: add device operations Jim Rees
2011-06-12 23:44 ` [PATCH 14/34] pnfsblock: remove " Jim Rees
2011-06-12 23:44 ` [PATCH 15/34] pnfsblock: lseg alloc and free Jim Rees
2011-06-12 23:44 ` [PATCH 16/34] pnfsblock: merge extents Jim Rees
2011-06-12 23:44 ` [PATCH 17/34] pnfsblock: call and parse getdevicelist Jim Rees
2011-06-14 15:36   ` Benny Halevy
2011-06-12 23:44 ` [PATCH 18/34] pnfsblock: allow use of PG_owner_priv_1 flag Jim Rees
2011-06-13 15:56   ` Fred Isaman
2011-06-12 23:44 ` [PATCH 19/34] pnfsblock: xdr decode pnfs_block_layout4 Jim Rees
2011-06-12 23:44 ` [PATCH 20/34] pnfsblock: find_get_extent Jim Rees
2011-06-12 23:44 ` [PATCH 21/34] pnfsblock: SPLITME: add extent manipulation functions Jim Rees
2011-06-14 15:40   ` Benny Halevy
2011-06-12 23:44 ` [PATCH 22/34] pnfsblock: merge rw extents Jim Rees
2011-06-12 23:44 ` [PATCH 23/34] pnfsblock: encode_layoutcommit Jim Rees
2011-06-14 15:44   ` Benny Halevy
2011-06-12 23:44 ` [PATCH 24/34] pnfsblock: cleanup_layoutcommit Jim Rees
2011-06-12 23:44 ` [PATCH 25/34] pnfsblock: bl_read_pagelist Jim Rees
2011-06-12 23:44 ` [PATCH 26/34] pnfsblock: write_begin Jim Rees
2011-06-12 23:44 ` [PATCH 27/34] pnfsblock: write_end Jim Rees
2011-06-12 23:44 ` [PATCH 28/34] pnfsblock: write_end_cleanup Jim Rees
2011-06-12 23:45 ` [PATCH 29/34] pnfsblock: bl_write_pagelist support functions Jim Rees
2011-06-12 23:45 ` [PATCH 30/34] pnfsblock: bl_write_pagelist Jim Rees
2011-06-12 23:45 ` [PATCH 31/34] pnfsblock: note written INVAL areas for layoutcommit Jim Rees
2011-06-12 23:45 ` [PATCH 32/34] pnfsblock: Implement release_inval_marks Jim Rees
2011-06-12 23:45 ` [PATCH 33/34] Add configurable prefetch size for layoutget Jim Rees
2011-06-12 23:45 ` [PATCH 34/34] NFS41: do not update isize if inode needs layoutcommit Jim Rees
2011-06-14 16:15   ` Benny Halevy
2011-06-14 16:22     ` Fred Isaman

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