Commit 871760ce authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Trond Myklebust
Browse files

pnfs/blocklayout: move all rpc_pipefs related code into a single file 



Create a file to house all the rpc_pipefs boilerplate code instead of
sprinkling it over a few files.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent ca0fe1df

fs/nfs/blocklayout/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -2,5 +2,5 @@ 
# Makefile for the pNFS block layout driver kernel module

#

obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o

blocklayoutdriver-objs := blocklayout.o blocklayoutdev.o blocklayoutdm.o \

	extent_tree.o
 


blocklayoutdriver-y += blocklayout.o extent_tree.o rpc_pipefs.o

fs/nfs/blocklayout/blocklayout.c

+6 −139
Original line number Diff line number Diff line
@@ -863,132 +863,6 @@ static struct pnfs_layoutdriver_type blocklayout_type = { 
	.pg_write_ops			= &bl_pg_write_ops,

};



static const struct rpc_pipe_ops bl_upcall_ops = {

	.upcall		= rpc_pipe_generic_upcall,

	.downcall	= bl_pipe_downcall,

	.destroy_msg	= bl_pipe_destroy_msg,

};



static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb,

					    struct rpc_pipe *pipe)

{

	struct dentry *dir, *dentry;



	dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME);

	if (dir == NULL)

		return ERR_PTR(-ENOENT);

	dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe);

	dput(dir);

	return dentry;

}



static void nfs4blocklayout_unregister_sb(struct super_block *sb,

					  struct rpc_pipe *pipe)

{

	if (pipe->dentry)

		rpc_unlink(pipe->dentry);

}



static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,

			   void *ptr)

{

	struct super_block *sb = ptr;

	struct net *net = sb->s_fs_info;

	struct nfs_net *nn = net_generic(net, nfs_net_id);

	struct dentry *dentry;

	int ret = 0;



	if (!try_module_get(THIS_MODULE))

		return 0;



	if (nn->bl_device_pipe == NULL) {

		module_put(THIS_MODULE);

		return 0;

	}



	switch (event) {

	case RPC_PIPEFS_MOUNT:

		dentry = nfs4blocklayout_register_sb(sb, nn->bl_device_pipe);

		if (IS_ERR(dentry)) {

			ret = PTR_ERR(dentry);

			break;

		}

		nn->bl_device_pipe->dentry = dentry;

		break;

	case RPC_PIPEFS_UMOUNT:

		if (nn->bl_device_pipe->dentry)

			nfs4blocklayout_unregister_sb(sb, nn->bl_device_pipe);

		break;

	default:

		ret = -ENOTSUPP;

		break;

	}

	module_put(THIS_MODULE);

	return ret;

}



static struct notifier_block nfs4blocklayout_block = {

	.notifier_call = rpc_pipefs_event,

};



static struct dentry *nfs4blocklayout_register_net(struct net *net,

						   struct rpc_pipe *pipe)

{

	struct super_block *pipefs_sb;

	struct dentry *dentry;



	pipefs_sb = rpc_get_sb_net(net);

	if (!pipefs_sb)

		return NULL;

	dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe);

	rpc_put_sb_net(net);

	return dentry;

}



static void nfs4blocklayout_unregister_net(struct net *net,

					   struct rpc_pipe *pipe)

{

	struct super_block *pipefs_sb;



	pipefs_sb = rpc_get_sb_net(net);

	if (pipefs_sb) {

		nfs4blocklayout_unregister_sb(pipefs_sb, pipe);

		rpc_put_sb_net(net);

	}

}



static int nfs4blocklayout_net_init(struct net *net)

{

	struct nfs_net *nn = net_generic(net, nfs_net_id);

	struct dentry *dentry;



	init_waitqueue_head(&nn->bl_wq);

	nn->bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);

	if (IS_ERR(nn->bl_device_pipe))

		return PTR_ERR(nn->bl_device_pipe);

	dentry = nfs4blocklayout_register_net(net, nn->bl_device_pipe);

	if (IS_ERR(dentry)) {

		rpc_destroy_pipe_data(nn->bl_device_pipe);

		return PTR_ERR(dentry);

	}

	nn->bl_device_pipe->dentry = dentry;

	return 0;

}



static void nfs4blocklayout_net_exit(struct net *net)

{

	struct nfs_net *nn = net_generic(net, nfs_net_id);



	nfs4blocklayout_unregister_net(net, nn->bl_device_pipe);

	rpc_destroy_pipe_data(nn->bl_device_pipe);

	nn->bl_device_pipe = NULL;

}



static struct pernet_operations nfs4blocklayout_net_ops = {

	.init = nfs4blocklayout_net_init,

	.exit = nfs4blocklayout_net_exit,

};



static int __init nfs4blocklayout_init(void)

{

	int ret;
@@ -998,20 +872,14 @@ static int __init nfs4blocklayout_init(void) 
	ret = pnfs_register_layoutdriver(&blocklayout_type);

	if (ret)

		goto out;



	ret = rpc_pipefs_notifier_register(&nfs4blocklayout_block);

	if (ret)

		goto out_remove;

	ret = register_pernet_subsys(&nfs4blocklayout_net_ops);

	ret = bl_init_pipefs();

	if (ret)

		goto out_notifier;

out:

	return ret;

		goto out_unregister;

	return 0;



out_notifier:

	rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);

out_remove:

out_unregister:

	pnfs_unregister_layoutdriver(&blocklayout_type);

out:

	return ret;

}
@@ -1020,8 +888,7 @@ static void __exit nfs4blocklayout_exit(void) 
	dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n",

	       __func__);



	rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);

	unregister_pernet_subsys(&nfs4blocklayout_net_ops);

	bl_cleanup_pipefs();

	pnfs_unregister_layoutdriver(&blocklayout_type);

}

fs/nfs/blocklayout/blocklayout.h

+8 −11
Original line number Diff line number Diff line
@@ -110,17 +110,6 @@ struct bl_msg_hdr { 
#define BL_DEVICE_REQUEST_PROC         0x1 /* User level process succeeds */

#define BL_DEVICE_REQUEST_ERR          0x2 /* User level process fails */



/* blocklayoutdev.c */

ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t);

void bl_pipe_destroy_msg(struct rpc_pipe_msg *);



struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,

		struct pnfs_device *pdev, gfp_t gfp_mask);

void bl_free_deviceid_node(struct nfs4_deviceid_node *d);



/* blocklayoutdm.c */

void bl_dm_remove(struct net *net, dev_t dev);



/* extent_tree.c */

int ext_tree_insert(struct pnfs_block_layout *bl,

		struct pnfs_block_extent *new);
@@ -133,4 +122,12 @@ bool ext_tree_lookup(struct pnfs_block_layout *bl, sector_t isect, 
int ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg);

void ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status);



/* rpc_pipefs.c */

struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,

		struct pnfs_device *pdev, gfp_t gfp_mask);

void bl_free_deviceid_node(struct nfs4_deviceid_node *d);



int __init bl_init_pipefs(void);

void __exit bl_cleanup_pipefs(void);



#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */

fs/nfs/blocklayout/blocklayoutdm.c

deleted100644 → 0
+0 −84
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



void bl_dm_remove(struct net *net, dev_t dev)

{

	struct bl_pipe_msg bl_pipe_msg;

	struct rpc_pipe_msg *msg = &bl_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);

	struct nfs_net *nn = net_generic(net, nfs_net_id);



	dprintk("Entering %s\n", __func__);



	bl_pipe_msg.bl_wq = &nn->bl_wq;

	memset(msg, 0, sizeof(*msg));

	msg->len = sizeof(bl_msg) + bl_msg.totallen;

	msg->data = kzalloc(msg->len, 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));



	add_wait_queue(&nn->bl_wq, &wq);

	if (rpc_queue_upcall(nn->bl_device_pipe, msg) < 0) {

		remove_wait_queue(&nn->bl_wq, &wq);

		goto out;

	}



	set_current_state(TASK_UNINTERRUPTIBLE);

	schedule();

	__set_current_state(TASK_RUNNING);

	remove_wait_queue(&nn->bl_wq, &wq);



out:

	kfree(msg->data);

}

fs/nfs/blocklayout/blocklayoutdev.c→fs/nfs/blocklayout/rpc_pipefs.c

+362 −0
Original line number Diff line number Diff line 
/*

 *  linux/fs/nfs/blocklayout/blocklayoutdev.c

 *

 *  Device operations for the pnfs nfs4 file layout driver.

 *

 *  Copyright (c) 2006 The Regents of the University of Michigan.

 *  Copyright (c) 2006,2007 The Regents of the University of Michigan.

 *  All rights reserved.

 *

 *  Andy Adamson <andros@citi.umich.edu>
@@ -29,41 +25,58 @@ 
 * of the software, even if it has been or is hereafter advised of the

 * possibility of such damages.

 */

#include <linux/module.h>

#include <linux/buffer_head.h> /* __bread */



#include <linux/module.h>

#include <linux/genhd.h>

#include <linux/blkdev.h>

#include <linux/hash.h>



#include "blocklayout.h"



#define NFSDBG_FACILITY         NFSDBG_PNFS_LD



ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,

			 size_t mlen)

static void bl_dm_remove(struct net *net, dev_t dev)

{

	struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,

					 nfs_net_id);

	struct bl_pipe_msg bl_pipe_msg;

	struct rpc_pipe_msg *msg = &bl_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);

	struct nfs_net *nn = net_generic(net, nfs_net_id);



	if (mlen != sizeof (struct bl_dev_msg))

		return -EINVAL;

	dprintk("Entering %s\n", __func__);



	if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0)

		return -EFAULT;

	bl_pipe_msg.bl_wq = &nn->bl_wq;

	memset(msg, 0, sizeof(*msg));

	msg->len = sizeof(bl_msg) + bl_msg.totallen;

	msg->data = kzalloc(msg->len, GFP_NOFS);

	if (!msg->data)

		goto out;



	wake_up(&nn->bl_wq);

	memset(&bl_umount_request, 0, sizeof(bl_umount_request));

	bl_umount_request.major = MAJOR(dev);

	bl_umount_request.minor = MINOR(dev);



	return mlen;

	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));



	add_wait_queue(&nn->bl_wq, &wq);

	if (rpc_queue_upcall(nn->bl_device_pipe, msg) < 0) {

		remove_wait_queue(&nn->bl_wq, &wq);

		goto out;

	}



void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)

{

	struct bl_pipe_msg *bl_pipe_msg = container_of(msg, struct bl_pipe_msg, msg);

	set_current_state(TASK_UNINTERRUPTIBLE);

	schedule();

	__set_current_state(TASK_RUNNING);

	remove_wait_queue(&nn->bl_wq, &wq);



	if (msg->errno >= 0)

		return;

	wake_up(bl_pipe_msg->bl_wq);

out:

	kfree(msg->data);

}



/*
@@ -170,3 +183,180 @@ bl_free_deviceid_node(struct nfs4_deviceid_node *d) 


	kfree(dev);

}



static ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,

			 size_t mlen)

{

	struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,

					 nfs_net_id);



	if (mlen != sizeof (struct bl_dev_msg))

		return -EINVAL;



	if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0)

		return -EFAULT;



	wake_up(&nn->bl_wq);



	return mlen;

}



static void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)

{

	struct bl_pipe_msg *bl_pipe_msg =

		container_of(msg, struct bl_pipe_msg, msg);



	if (msg->errno >= 0)

		return;

	wake_up(bl_pipe_msg->bl_wq);

}



static const struct rpc_pipe_ops bl_upcall_ops = {

	.upcall		= rpc_pipe_generic_upcall,

	.downcall	= bl_pipe_downcall,

	.destroy_msg	= bl_pipe_destroy_msg,

};



static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb,

					    struct rpc_pipe *pipe)

{

	struct dentry *dir, *dentry;



	dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME);

	if (dir == NULL)

		return ERR_PTR(-ENOENT);

	dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe);

	dput(dir);

	return dentry;

}



static void nfs4blocklayout_unregister_sb(struct super_block *sb,

					  struct rpc_pipe *pipe)

{

	if (pipe->dentry)

		rpc_unlink(pipe->dentry);

}



static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,

			   void *ptr)

{

	struct super_block *sb = ptr;

	struct net *net = sb->s_fs_info;

	struct nfs_net *nn = net_generic(net, nfs_net_id);

	struct dentry *dentry;

	int ret = 0;



	if (!try_module_get(THIS_MODULE))

		return 0;



	if (nn->bl_device_pipe == NULL) {

		module_put(THIS_MODULE);

		return 0;

	}



	switch (event) {

	case RPC_PIPEFS_MOUNT:

		dentry = nfs4blocklayout_register_sb(sb, nn->bl_device_pipe);

		if (IS_ERR(dentry)) {

			ret = PTR_ERR(dentry);

			break;

		}

		nn->bl_device_pipe->dentry = dentry;

		break;

	case RPC_PIPEFS_UMOUNT:

		if (nn->bl_device_pipe->dentry)

			nfs4blocklayout_unregister_sb(sb, nn->bl_device_pipe);

		break;

	default:

		ret = -ENOTSUPP;

		break;

	}

	module_put(THIS_MODULE);

	return ret;

}



static struct notifier_block nfs4blocklayout_block = {

	.notifier_call = rpc_pipefs_event,

};



static struct dentry *nfs4blocklayout_register_net(struct net *net,

						   struct rpc_pipe *pipe)

{

	struct super_block *pipefs_sb;

	struct dentry *dentry;



	pipefs_sb = rpc_get_sb_net(net);

	if (!pipefs_sb)

		return NULL;

	dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe);

	rpc_put_sb_net(net);

	return dentry;

}



static void nfs4blocklayout_unregister_net(struct net *net,

					   struct rpc_pipe *pipe)

{

	struct super_block *pipefs_sb;



	pipefs_sb = rpc_get_sb_net(net);

	if (pipefs_sb) {

		nfs4blocklayout_unregister_sb(pipefs_sb, pipe);

		rpc_put_sb_net(net);

	}

}



static int nfs4blocklayout_net_init(struct net *net)

{

	struct nfs_net *nn = net_generic(net, nfs_net_id);

	struct dentry *dentry;



	init_waitqueue_head(&nn->bl_wq);

	nn->bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);

	if (IS_ERR(nn->bl_device_pipe))

		return PTR_ERR(nn->bl_device_pipe);

	dentry = nfs4blocklayout_register_net(net, nn->bl_device_pipe);

	if (IS_ERR(dentry)) {

		rpc_destroy_pipe_data(nn->bl_device_pipe);

		return PTR_ERR(dentry);

	}

	nn->bl_device_pipe->dentry = dentry;

	return 0;

}



static void nfs4blocklayout_net_exit(struct net *net)

{

	struct nfs_net *nn = net_generic(net, nfs_net_id);



	nfs4blocklayout_unregister_net(net, nn->bl_device_pipe);

	rpc_destroy_pipe_data(nn->bl_device_pipe);

	nn->bl_device_pipe = NULL;

}



static struct pernet_operations nfs4blocklayout_net_ops = {

	.init = nfs4blocklayout_net_init,

	.exit = nfs4blocklayout_net_exit,

};



int __init bl_init_pipefs(void)

{

	int ret;



	ret = rpc_pipefs_notifier_register(&nfs4blocklayout_block);

	if (ret)

		goto out;

	ret = register_pernet_subsys(&nfs4blocklayout_net_ops);

	if (ret)

		goto out_unregister_notifier;

	return 0;



out_unregister_notifier:

	rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);

out:

	return ret;

}



void __exit bl_cleanup_pipefs(void)

{

	rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);

	unregister_pernet_subsys(&nfs4blocklayout_net_ops);

}