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pnfsblock: remove device operations

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Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
[upcall bugfixes]
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Jim Rees 2011-07-30 20:52:43 -04:00 committed by Trond Myklebust
parent fe0a9b7408
commit 025a70ed65
3 changed files with 115 additions and 1 deletions
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2
fs/nfs/blocklayout/Makefile
View file

@ -2,4 +2,4 @@
# Makefile for the pNFS block layout driver kernel module
#
obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
blocklayoutdriver-objs := blocklayout.o extents.o blocklayoutdev.o
blocklayoutdriver-objs := blocklayout.o extents.o blocklayoutdev.o blocklayoutdm.o

3
fs/nfs/blocklayout/blocklayout.h
View file

@ -128,5 +128,8 @@ struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server,
int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
/* blocklayoutdm.c */
void bl_free_block_dev(struct pnfs_block_dev *bdev);
void bl_put_extent(struct pnfs_block_extent *be);
#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */

111
fs/nfs/blocklayout/blocklayoutdm.c Normal file
View file

@ -0,0 +1,111 @@
/*
* 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
static void dev_remove(dev_t dev)
{
struct rpc_pipe_msg msg;
struct bl_dev_msg bl_umount_request;
struct bl_msg_hdr bl_msg = {
.type = BL_DEVICE_UMOUNT,
.totallen = sizeof(bl_umount_request),
};
uint8_t *dataptr;
DECLARE_WAITQUEUE(wq, current);
dprintk("Entering %s\n", __func__);
memset(&msg, 0, sizeof(msg));
msg.data = kzalloc(1 + sizeof(bl_umount_request), GFP_NOFS);
if (!msg.data)
goto out;
memset(&bl_umount_request, 0, sizeof(bl_umount_request));
bl_umount_request.major = MAJOR(dev);
bl_umount_request.minor = MINOR(dev);
memcpy(msg.data, &bl_msg, sizeof(bl_msg));
dataptr = (uint8_t *) msg.data;
memcpy(&dataptr[sizeof(bl_msg)], &bl_umount_request, sizeof(bl_umount_request));
msg.len = sizeof(bl_msg) + bl_msg.totallen;
add_wait_queue(&bl_wq, &wq);
if (rpc_queue_upcall(bl_device_pipe->d_inode, &msg) < 0) {
remove_wait_queue(&bl_wq, &wq);
goto out;
}
set_current_state(TASK_UNINTERRUPTIBLE);
schedule();
__set_current_state(TASK_RUNNING);
remove_wait_queue(&bl_wq, &wq);
out:
kfree(msg.data);
}
/*
* Release meta device
*/
static void nfs4_blk_metadev_release(struct pnfs_block_dev *bdev)
{
int rv;
dprintk("%s Releasing\n", __func__);
rv = nfs4_blkdev_put(bdev->bm_mdev);
if (rv)
printk(KERN_ERR "%s nfs4_blkdev_put returns %d\n",
__func__, rv);
dev_remove(bdev->bm_mdev->bd_dev);
}
void bl_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));
nfs4_blk_metadev_release(bdev);
}
kfree(bdev);
}
}