pnfsblock: remove device operations (025a70ed) · Commits · e / devices / android_kernel_xiaomi_markw

fs/nfs/blocklayout/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

fs/nfs/blocklayout/blocklayout.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 */

fs/nfs/blocklayout/blocklayoutdm.c

0 → 100644

+111 −0

Original line number	Diff line number	Diff line
		/*
		* 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);
		}
		}