1 files changed, 0 insertions, 384 deletions
diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c
deleted file mode 100644
index 04303b5c9361..000000000000
--- a/fs/nfs/blocklayout/blocklayoutdev.c
+++ /dev/null
@@ -1,384 +0,0 @@
-/*
- *  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.
- *  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/buffer_head.h> /* __bread */
-
-#include <linux/genhd.h>
-#include <linux/blkdev.h>
-#include <linux/hash.h>
-
-#include "blocklayout.h"
-
-#define NFSDBG_FACILITY         NFSDBG_PNFS_LD
-
-static int decode_sector_number(__be32 **rp, sector_t *sp)
-{
-	uint64_t s;
-
-	*rp = xdr_decode_hyper(*rp, &s);
-	if (s & 0x1ff) {
-		printk(KERN_WARNING "NFS: %s: sector not aligned\n", __func__);
-		return -1;
-	}
-	*sp = s >> SECTOR_SHIFT;
-	return 0;
-}
-
-/*
- * Release the block device
- */
-void nfs4_blkdev_put(struct block_device *bdev)
-{
-	dprintk("%s for device %d:%d\n", __func__, MAJOR(bdev->bd_dev),
-			MINOR(bdev->bd_dev));
-	blkdev_put(bdev, FMODE_READ);
-}
-
-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;
-}
-
-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);
-}
-
-/*
- * Decodes pnfs_block_deviceaddr4 which is XDR encoded in dev->dev_addr_buf.
- */
-struct pnfs_block_dev *
-nfs4_blk_decode_device(struct nfs_server *server,
-		       struct pnfs_device *dev)
-{
-	struct pnfs_block_dev *rv;
-	struct block_device *bd = NULL;
-	struct bl_pipe_msg bl_pipe_msg;
-	struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
-	struct bl_msg_hdr bl_msg = {
-		.type = BL_DEVICE_MOUNT,
-		.totallen = dev->mincount,
-	};
-	uint8_t *dataptr;
-	DECLARE_WAITQUEUE(wq, current);
-	int offset, len, i, rc;
-	struct net *net = server->nfs_client->cl_net;
-	struct nfs_net *nn = net_generic(net, nfs_net_id);
-	struct bl_dev_msg *reply = &nn->bl_mount_reply;
-
-	dprintk("%s CREATING PIPEFS MESSAGE\n", __func__);
-	dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data,
-		dev->mincount);
-
-	bl_pipe_msg.bl_wq = &nn->bl_wq;
-	memset(msg, 0, sizeof(*msg));
-	msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, GFP_NOFS);
-	if (!msg->data) {
-		rv = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-
-	memcpy(msg->data, &bl_msg, sizeof(bl_msg));
-	dataptr = (uint8_t *) msg->data;
-	len = dev->mincount;
-	offset = sizeof(bl_msg);
-	for (i = 0; len > 0; i++) {
-		memcpy(&dataptr[offset], page_address(dev->pages[i]),
-				len < PAGE_CACHE_SIZE ? len : PAGE_CACHE_SIZE);
-		len -= PAGE_CACHE_SIZE;
-		offset += PAGE_CACHE_SIZE;
-	}
-	msg->len = sizeof(bl_msg) + dev->mincount;
-
-	dprintk("%s CALLING USERSPACE DAEMON\n", __func__);
-	add_wait_queue(&nn->bl_wq, &wq);
-	rc = rpc_queue_upcall(nn->bl_device_pipe, msg);
-	if (rc < 0) {
-		remove_wait_queue(&nn->bl_wq, &wq);
-		rv = ERR_PTR(rc);
-		goto out;
-	}
-
-	set_current_state(TASK_UNINTERRUPTIBLE);
-	schedule();
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&nn->bl_wq, &wq);
-
-	if (reply->status != BL_DEVICE_REQUEST_PROC) {
-		dprintk("%s failed to open device: %d\n",
-			__func__, reply->status);
-		rv = ERR_PTR(-EINVAL);
-		goto out;
-	}
-
-	bd = blkdev_get_by_dev(MKDEV(reply->major, reply->minor),
-			       FMODE_READ, NULL);
-	if (IS_ERR(bd)) {
-		dprintk("%s failed to open device : %ld\n", __func__,
-			PTR_ERR(bd));
-		rv = ERR_CAST(bd);
-		goto out;
-	}
-
-	rv = kzalloc(sizeof(*rv), GFP_NOFS);
-	if (!rv) {
-		rv = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-
-	rv->bm_mdev = bd;
-	memcpy(&rv->bm_mdevid, &dev->dev_id, sizeof(struct nfs4_deviceid));
-	rv->net = net;
-	dprintk("%s Created device %s with bd_block_size %u\n",
-		__func__,
-		bd->bd_disk->disk_name,
-		bd->bd_block_size);
-
-out:
-	kfree(msg->data);
-	return rv;
-}
-
-/* Map deviceid returned by the server to constructed block_device */
-static struct block_device *translate_devid(struct pnfs_layout_hdr *lo,
-					    struct nfs4_deviceid *id)
-{
-	struct block_device *rv = NULL;
-	struct block_mount_id *mid;
-	struct pnfs_block_dev *dev;
-
-	dprintk("%s enter, lo=%p, id=%p\n", __func__, lo, id);
-	mid = BLK_ID(lo);
-	spin_lock(&mid->bm_lock);
-	list_for_each_entry(dev, &mid->bm_devlist, bm_node) {
-		if (memcmp(id->data, dev->bm_mdevid.data,
-			   NFS4_DEVICEID4_SIZE) == 0) {
-			rv = dev->bm_mdev;
-			goto out;
-		}
-	}
- out:
-	spin_unlock(&mid->bm_lock);
-	dprintk("%s returning %p\n", __func__, rv);
-	return rv;
-}
-
-/* Tracks info needed to ensure extents in layout obey constraints of spec */
-struct layout_verification {
-	u32 mode;	/* R or RW */
-	u64 start;	/* Expected start of next non-COW extent */
-	u64 inval;	/* Start of INVAL coverage */
-	u64 cowread;	/* End of COW read coverage */
-};
-
-/* Verify the extent meets the layout requirements of the pnfs-block draft,
- * section 2.3.1.
- */
-static int verify_extent(struct pnfs_block_extent *be,
-			 struct layout_verification *lv)
-{
-	if (lv->mode == IOMODE_READ) {
-		if (be->be_state == PNFS_BLOCK_READWRITE_DATA ||
-		    be->be_state == PNFS_BLOCK_INVALID_DATA)
-			return -EIO;
-		if (be->be_f_offset != lv->start)
-			return -EIO;
-		lv->start += be->be_length;
-		return 0;
-	}
-	/* lv->mode == IOMODE_RW */
-	if (be->be_state == PNFS_BLOCK_READWRITE_DATA) {
-		if (be->be_f_offset != lv->start)
-			return -EIO;
-		if (lv->cowread > lv->start)
-			return -EIO;
-		lv->start += be->be_length;
-		lv->inval = lv->start;
-		return 0;
-	} else if (be->be_state == PNFS_BLOCK_INVALID_DATA) {
-		if (be->be_f_offset != lv->start)
-			return -EIO;
-		lv->start += be->be_length;
-		return 0;
-	} else if (be->be_state == PNFS_BLOCK_READ_DATA) {
-		if (be->be_f_offset > lv->start)
-			return -EIO;
-		if (be->be_f_offset < lv->inval)
-			return -EIO;
-		if (be->be_f_offset < lv->cowread)
-			return -EIO;
-		/* It looks like you might want to min this with lv->start,
-		 * but you really don't.
-		 */
-		lv->inval = lv->inval + be->be_length;
-		lv->cowread = be->be_f_offset + be->be_length;
-		return 0;
-	} else
-		return -EIO;
-}
-
-/* XDR decode pnfs_block_layout4 structure */
-int
-nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
-			   struct nfs4_layoutget_res *lgr, gfp_t gfp_flags)
-{
-	struct pnfs_block_layout *bl = BLK_LO2EXT(lo);
-	int i, status = -EIO;
-	uint32_t count;
-	struct pnfs_block_extent *be = NULL, *save;
-	struct xdr_stream stream;
-	struct xdr_buf buf;
-	struct page *scratch;
-	__be32 *p;
-	struct layout_verification lv = {
-		.mode = lgr->range.iomode,
-		.start = lgr->range.offset >> SECTOR_SHIFT,
-		.inval = lgr->range.offset >> SECTOR_SHIFT,
-		.cowread = lgr->range.offset >> SECTOR_SHIFT,
-	};
-	LIST_HEAD(extents);
-
-	dprintk("---> %s\n", __func__);
-
-	scratch = alloc_page(gfp_flags);
-	if (!scratch)
-		return -ENOMEM;
-
-	xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len);
-	xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
-
-	p = xdr_inline_decode(&stream, 4);
-	if (unlikely(!p))
-		goto out_err;
-
-	count = be32_to_cpup(p++);
-
-	dprintk("%s enter, number of extents %i\n", __func__, count);
-	p = xdr_inline_decode(&stream, (28 + NFS4_DEVICEID4_SIZE) * count);
-	if (unlikely(!p))
-		goto out_err;
-
-	/* Decode individual extents, putting them in temporary
-	 * staging area until whole layout is decoded to make error
-	 * recovery easier.
-	 */
-	for (i = 0; i < count; i++) {
-		be = bl_alloc_extent();
-		if (!be) {
-			status = -ENOMEM;
-			goto out_err;
-		}
-		memcpy(&be->be_devid, p, NFS4_DEVICEID4_SIZE);
-		p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
-		be->be_mdev = translate_devid(lo, &be->be_devid);
-		if (!be->be_mdev)
-			goto out_err;
-
-		/* The next three values are read in as bytes,
-		 * but stored as 512-byte sector lengths
-		 */
-		if (decode_sector_number(&p, &be->be_f_offset) < 0)
-			goto out_err;
-		if (decode_sector_number(&p, &be->be_length) < 0)
-			goto out_err;
-		if (decode_sector_number(&p, &be->be_v_offset) < 0)
-			goto out_err;
-		be->be_state = be32_to_cpup(p++);
-		if (be->be_state == PNFS_BLOCK_INVALID_DATA)
-			be->be_inval = &bl->bl_inval;
-		if (verify_extent(be, &lv)) {
-			dprintk("%s verify failed\n", __func__);
-			goto out_err;
-		}
-		list_add_tail(&be->be_node, &extents);
-	}
-	if (lgr->range.offset + lgr->range.length !=
-			lv.start << SECTOR_SHIFT) {
-		dprintk("%s Final length mismatch\n", __func__);
-		be = NULL;
-		goto out_err;
-	}
-	if (lv.start < lv.cowread) {
-		dprintk("%s Final uncovered COW extent\n", __func__);
-		be = NULL;
-		goto out_err;
-	}
-	/* Extents decoded properly, now try to merge them in to
-	 * existing layout extents.
-	 */
-	spin_lock(&bl->bl_ext_lock);
-	list_for_each_entry_safe(be, save, &extents, be_node) {
-		list_del(&be->be_node);
-		status = bl_add_merge_extent(bl, be);
-		if (status) {
-			spin_unlock(&bl->bl_ext_lock);
-			/* This is a fairly catastrophic error, as the
-			 * entire layout extent lists are now corrupted.
-			 * We should have some way to distinguish this.
-			 */
-			be = NULL;
-			goto out_err;
-		}
-	}
-	spin_unlock(&bl->bl_ext_lock);
-	status = 0;
- out:
-	__free_page(scratch);
-	dprintk("%s returns %i\n", __func__, status);
-	return status;
-
- out_err:
-	bl_put_extent(be);
-	while (!list_empty(&extents)) {
-		be = list_first_entry(&extents, struct pnfs_block_extent,
-				      be_node);
-		list_del(&be->be_node);
-		bl_put_extent(be);
-	}
-	goto out;
-}