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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 14/34] pnfsblock: remove device operations
Date: Sun, 12 Jun 2011 19:44:22 -0400
Message-ID: <a702af417872abc11fc5f5639d605f0154059cf2.1307921138.git.rees@umich.edu> (raw)
In-Reply-To: <cover.1307921137.git.rees@umich.edu>

Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
---
 fs/nfs/blocklayout/Makefile        |    2 +-
 fs/nfs/blocklayout/blocklayout.h   |    2 +
 fs/nfs/blocklayout/blocklayoutdm.c |  120 ++++++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+), 1 deletions(-)
 create mode 100644 fs/nfs/blocklayout/blocklayoutdm.c

diff --git a/fs/nfs/blocklayout/Makefile b/fs/nfs/blocklayout/Makefile
index bd69aad..bdbf180 100644
--- a/fs/nfs/blocklayout/Makefile
+++ b/fs/nfs/blocklayout/Makefile
@@ -2,4 +2,4 @@
 # Makefile for the pNFS block layout driver kernel module
 #
 obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
-blocklayoutdriver-objs := blocklayout.o block-device-discovery-pipe.o extents.o blocklayoutdev.o
+blocklayoutdriver-objs := blocklayout.o block-device-discovery-pipe.o extents.o blocklayoutdev.o blocklayoutdm.o
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index 6c01d8c..e5ee11c 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -102,6 +102,8 @@ struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server,
 						struct list_head *sdlist);
 int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
 				struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
+/* blocklayoutdm.c */
+void free_block_dev(struct pnfs_block_dev *bdev);
 
 #include <linux/sunrpc/simple_rpc_pipefs.h>
 
diff --git a/fs/nfs/blocklayout/blocklayoutdm.c b/fs/nfs/blocklayout/blocklayoutdm.c
new file mode 100644
index 0000000..097dd05
--- /dev/null
+++ b/fs/nfs/blocklayout/blocklayoutdm.c
@@ -0,0 +1,120 @@
+/*
+ *  linux/fs/nfs/blocklayout/blocklayoutdm.c
+ *
+ *  Module for the NFSv4.1 pNFS block layout driver.
+ *
+ *  Copyright (c) 2007 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Fred Isaman <iisaman@umich.edu>
+ *  Andy Adamson <andros@citi.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/genhd.h> /* gendisk - used in a dprintk*/
+#include <linux/sched.h>
+#include <linux/hash.h>
+
+#include "blocklayout.h"
+
+#define NFSDBG_FACILITY         NFSDBG_PNFS_LD
+
+/* Defines used for calculating memory usage in nfs4_blk_flatten() */
+#define ARGSIZE   24    /* Max bytes needed for linear target arg string */
+#define SPECSIZE (sizeof8(struct dm_target_spec) + ARGSIZE)
+#define SPECS_PER_PAGE (PAGE_SIZE / SPECSIZE)
+#define SPEC_HEADER_ADJUST (SPECS_PER_PAGE - \
+			    (PAGE_SIZE - sizeof8(struct dm_ioctl)) / SPECSIZE)
+#define roundup8(x) (((x)+7) & ~7)
+#define sizeof8(x) roundup8(sizeof(x))
+
+static int dev_remove(dev_t dev)
+{
+	int ret = 1;
+	struct pipefs_hdr *msg = NULL, *reply = NULL;
+	uint64_t bl_dev;
+	uint32_t major = MAJOR(dev), minor = MINOR(dev);
+
+	dprintk("Entering %s\n", __func__);
+
+	if (IS_ERR(bl_device_pipe))
+		return ret;
+
+	memcpy((void *)&bl_dev, &major, sizeof(uint32_t));
+	memcpy((void *)&bl_dev + sizeof(uint32_t), &minor, sizeof(uint32_t));
+	msg = pipefs_alloc_init_msg(0, BL_DEVICE_UMOUNT, 0, (void *)&bl_dev,
+				    sizeof(uint64_t));
+	if (IS_ERR(msg)) {
+		dprintk("ERROR: couldn't make pipefs message.\n");
+		goto out;
+	}
+	msg->msgid = hash_ptr(&msg, sizeof(msg->msgid) * 8);
+	msg->status = BL_DEVICE_REQUEST_INIT;
+
+	reply = pipefs_queue_upcall_waitreply(bl_device_pipe, msg,
+					      &bl_device_list, 0, 0);
+	if (IS_ERR(reply)) {
+		dprintk("ERROR: upcall_waitreply failed\n");
+		goto out;
+	}
+
+	if (reply->status == BL_DEVICE_REQUEST_PROC)
+		ret = 0; /*TODO: what to return*/
+out:
+	if (!IS_ERR(reply))
+		kfree(reply);
+	if (!IS_ERR(msg))
+		kfree(msg);
+	return ret;
+}
+
+/*
+ * Release meta device
+ */
+static int nfs4_blk_metadev_release(struct pnfs_block_dev *bdev)
+{
+	int rv;
+
+	dprintk("%s Releasing\n", __func__);
+	/* XXX Check return? */
+	rv = nfs4_blkdev_put(bdev->bm_mdev);
+	dprintk("%s nfs4_blkdev_put returns %d\n", __func__, rv);
+
+	rv = dev_remove(bdev->bm_mdev->bd_dev);
+	dprintk("%s Returns %d\n", __func__, rv);
+	return rv;
+}
+
+void free_block_dev(struct pnfs_block_dev *bdev)
+{
+	if (bdev) {
+		if (bdev->bm_mdev) {
+			dprintk("%s Removing DM device: %d:%d\n",
+				__func__,
+				MAJOR(bdev->bm_mdev->bd_dev),
+				MINOR(bdev->bm_mdev->bd_dev));
+			/* XXX Check status ?? */
+			nfs4_blk_metadev_release(bdev);
+		}
+		kfree(bdev);
+	}
+}
-- 
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 ` [PATCH 08/34] pnfsblock: blocklayout stub Jim Rees
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 ` Jim Rees [this message]
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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