1 files changed, 0 insertions, 448 deletions
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
deleted file mode 100644
index 51fe64ace55..00000000000
--- a/fs/nfs/nfs4filelayoutdev.c
+++ /dev/null
@@ -1,448 +0,0 @@
-/*
- *  Device operations for the pnfs nfs4 file layout driver.
- *
- *  Copyright (c) 2002
- *  The Regents of the University of Michigan
- *  All Rights Reserved
- *
- *  Dean Hildebrand <dhildebz@umich.edu>
- *  Garth Goodson   <Garth.Goodson@netapp.com>
- *
- *  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 or warranty
- *  of any kind either express or implied, including without limitation
- *  the implied warranties of merchantability, fitness for a particular
- *  purpose, or noninfringement.  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 of 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/nfs_fs.h>
-#include <linux/vmalloc.h>
-
-#include "internal.h"
-#include "nfs4filelayout.h"
-
-#define NFSDBG_FACILITY		NFSDBG_PNFS_LD
-
-/*
- * Data server cache
- *
- * Data servers can be mapped to different device ids.
- * nfs4_pnfs_ds reference counting
- *   - set to 1 on allocation
- *   - incremented when a device id maps a data server already in the cache.
- *   - decremented when deviceid is removed from the cache.
- */
-DEFINE_SPINLOCK(nfs4_ds_cache_lock);
-static LIST_HEAD(nfs4_data_server_cache);
-
-/* Debug routines */
-void
-print_ds(struct nfs4_pnfs_ds *ds)
-{
-	if (ds == NULL) {
-		printk("%s NULL device\n", __func__);
-		return;
-	}
-	printk("        ip_addr %x port %hu\n"
-		"        ref count %d\n"
-		"        client %p\n"
-		"        cl_exchange_flags %x\n",
-		ntohl(ds->ds_ip_addr), ntohs(ds->ds_port),
-		atomic_read(&ds->ds_count), ds->ds_clp,
-		ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
-}
-
-void
-print_ds_list(struct nfs4_file_layout_dsaddr *dsaddr)
-{
-	int i;
-
-	ifdebug(FACILITY) {
-		printk("%s dsaddr->ds_num %d\n", __func__,
-		       dsaddr->ds_num);
-		for (i = 0; i < dsaddr->ds_num; i++)
-			print_ds(dsaddr->ds_list[i]);
-	}
-}
-
-void print_deviceid(struct nfs4_deviceid *id)
-{
-	u32 *p = (u32 *)id;
-
-	dprintk("%s: device id= [%x%x%x%x]\n", __func__,
-		p[0], p[1], p[2], p[3]);
-}
-
-/* nfs4_ds_cache_lock is held */
-static struct nfs4_pnfs_ds *
-_data_server_lookup_locked(u32 ip_addr, u32 port)
-{
-	struct nfs4_pnfs_ds *ds;
-
-	dprintk("_data_server_lookup: ip_addr=%x port=%hu\n",
-			ntohl(ip_addr), ntohs(port));
-
-	list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) {
-		if (ds->ds_ip_addr == ip_addr &&
-		    ds->ds_port == port) {
-			return ds;
-		}
-	}
-	return NULL;
-}
-
-static void
-destroy_ds(struct nfs4_pnfs_ds *ds)
-{
-	dprintk("--> %s\n", __func__);
-	ifdebug(FACILITY)
-		print_ds(ds);
-
-	if (ds->ds_clp)
-		nfs_put_client(ds->ds_clp);
-	kfree(ds);
-}
-
-static void
-nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr)
-{
-	struct nfs4_pnfs_ds *ds;
-	int i;
-
-	print_deviceid(&dsaddr->deviceid.de_id);
-
-	for (i = 0; i < dsaddr->ds_num; i++) {
-		ds = dsaddr->ds_list[i];
-		if (ds != NULL) {
-			if (atomic_dec_and_lock(&ds->ds_count,
-						&nfs4_ds_cache_lock)) {
-				list_del_init(&ds->ds_node);
-				spin_unlock(&nfs4_ds_cache_lock);
-				destroy_ds(ds);
-			}
-		}
-	}
-	kfree(dsaddr->stripe_indices);
-	kfree(dsaddr);
-}
-
-void
-nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *device)
-{
-	struct nfs4_file_layout_dsaddr *dsaddr =
-		container_of(device, struct nfs4_file_layout_dsaddr, deviceid);
-
-	nfs4_fl_free_deviceid(dsaddr);
-}
-
-static struct nfs4_pnfs_ds *
-nfs4_pnfs_ds_add(struct inode *inode, u32 ip_addr, u32 port)
-{
-	struct nfs4_pnfs_ds *tmp_ds, *ds;
-
-	ds = kzalloc(sizeof(*tmp_ds), GFP_KERNEL);
-	if (!ds)
-		goto out;
-
-	spin_lock(&nfs4_ds_cache_lock);
-	tmp_ds = _data_server_lookup_locked(ip_addr, port);
-	if (tmp_ds == NULL) {
-		ds->ds_ip_addr = ip_addr;
-		ds->ds_port = port;
-		atomic_set(&ds->ds_count, 1);
-		INIT_LIST_HEAD(&ds->ds_node);
-		ds->ds_clp = NULL;
-		list_add(&ds->ds_node, &nfs4_data_server_cache);
-		dprintk("%s add new data server ip 0x%x\n", __func__,
-			ds->ds_ip_addr);
-	} else {
-		kfree(ds);
-		atomic_inc(&tmp_ds->ds_count);
-		dprintk("%s data server found ip 0x%x, inc'ed ds_count to %d\n",
-			__func__, tmp_ds->ds_ip_addr,
-			atomic_read(&tmp_ds->ds_count));
-		ds = tmp_ds;
-	}
-	spin_unlock(&nfs4_ds_cache_lock);
-out:
-	return ds;
-}
-
-/*
- * Currently only support ipv4, and one multi-path address.
- */
-static struct nfs4_pnfs_ds *
-decode_and_add_ds(__be32 **pp, struct inode *inode)
-{
-	struct nfs4_pnfs_ds *ds = NULL;
-	char *buf;
-	const char *ipend, *pstr;
-	u32 ip_addr, port;
-	int nlen, rlen, i;
-	int tmp[2];
-	__be32 *r_netid, *r_addr, *p = *pp;
-
-	/* r_netid */
-	nlen = be32_to_cpup(p++);
-	r_netid = p;
-	p += XDR_QUADLEN(nlen);
-
-	/* r_addr */
-	rlen = be32_to_cpup(p++);
-	r_addr = p;
-	p += XDR_QUADLEN(rlen);
-	*pp = p;
-
-	/* Check that netid is "tcp" */
-	if (nlen != 3 ||  memcmp((char *)r_netid, "tcp", 3)) {
-		dprintk("%s: ERROR: non ipv4 TCP r_netid\n", __func__);
-		goto out_err;
-	}
-
-	/* ipv6 length plus port is legal */
-	if (rlen > INET6_ADDRSTRLEN + 8) {
-		dprintk("%s Invalid address, length %d\n", __func__,
-			rlen);
-		goto out_err;
-	}
-	buf = kmalloc(rlen + 1, GFP_KERNEL);
-	buf[rlen] = '\0';
-	memcpy(buf, r_addr, rlen);
-
-	/* replace the port dots with dashes for the in4_pton() delimiter*/
-	for (i = 0; i < 2; i++) {
-		char *res = strrchr(buf, '.');
-		*res = '-';
-	}
-
-	/* Currently only support ipv4 address */
-	if (in4_pton(buf, rlen, (u8 *)&ip_addr, '-', &ipend) == 0) {
-		dprintk("%s: Only ipv4 addresses supported\n", __func__);
-		goto out_free;
-	}
-
-	/* port */
-	pstr = ipend;
-	sscanf(pstr, "-%d-%d", &tmp[0], &tmp[1]);
-	port = htons((tmp[0] << 8) | (tmp[1]));
-
-	ds = nfs4_pnfs_ds_add(inode, ip_addr, port);
-	dprintk("%s Decoded address and port %s\n", __func__, buf);
-out_free:
-	kfree(buf);
-out_err:
-	return ds;
-}
-
-/* Decode opaque device data and return the result */
-static struct nfs4_file_layout_dsaddr*
-decode_device(struct inode *ino, struct pnfs_device *pdev)
-{
-	int i, dummy;
-	u32 cnt, num;
-	u8 *indexp;
-	__be32 *p = (__be32 *)pdev->area, *indicesp;
-	struct nfs4_file_layout_dsaddr *dsaddr;
-
-	/* Get the stripe count (number of stripe index) */
-	cnt = be32_to_cpup(p++);
-	dprintk("%s stripe count  %d\n", __func__, cnt);
-	if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) {
-		printk(KERN_WARNING "%s: stripe count %d greater than "
-		       "supported maximum %d\n", __func__,
-			cnt, NFS4_PNFS_MAX_STRIPE_CNT);
-		goto out_err;
-	}
-
-	/* Check the multipath list count */
-	indicesp = p;
-	p += XDR_QUADLEN(cnt << 2);
-	num = be32_to_cpup(p++);
-	dprintk("%s ds_num %u\n", __func__, num);
-	if (num > NFS4_PNFS_MAX_MULTI_CNT) {
-		printk(KERN_WARNING "%s: multipath count %d greater than "
-			"supported maximum %d\n", __func__,
-			num, NFS4_PNFS_MAX_MULTI_CNT);
-		goto out_err;
-	}
-	dsaddr = kzalloc(sizeof(*dsaddr) +
-			(sizeof(struct nfs4_pnfs_ds *) * (num - 1)),
-			GFP_KERNEL);
-	if (!dsaddr)
-		goto out_err;
-
-	dsaddr->stripe_indices = kzalloc(sizeof(u8) * cnt, GFP_KERNEL);
-	if (!dsaddr->stripe_indices)
-		goto out_err_free;
-
-	dsaddr->stripe_count = cnt;
-	dsaddr->ds_num = num;
-
-	memcpy(&dsaddr->deviceid.de_id, &pdev->dev_id, sizeof(pdev->dev_id));
-
-	/* Go back an read stripe indices */
-	p = indicesp;
-	indexp = &dsaddr->stripe_indices[0];
-	for (i = 0; i < dsaddr->stripe_count; i++) {
-		*indexp = be32_to_cpup(p++);
-		if (*indexp >= num)
-			goto out_err_free;
-		indexp++;
-	}
-	/* Skip already read multipath list count */
-	p++;
-
-	for (i = 0; i < dsaddr->ds_num; i++) {
-		int j;
-
-		dummy = be32_to_cpup(p++); /* multipath count */
-		if (dummy > 1) {
-			printk(KERN_WARNING
-			       "%s: Multipath count %d not supported, "
-			       "skipping all greater than 1\n", __func__,
-				dummy);
-		}
-		for (j = 0; j < dummy; j++) {
-			if (j == 0) {
-				dsaddr->ds_list[i] = decode_and_add_ds(&p, ino);
-				if (dsaddr->ds_list[i] == NULL)
-					goto out_err_free;
-			} else {
-				u32 len;
-				/* skip extra multipath */
-				len = be32_to_cpup(p++);
-				p += XDR_QUADLEN(len);
-				len = be32_to_cpup(p++);
-				p += XDR_QUADLEN(len);
-				continue;
-			}
-		}
-	}
-	return dsaddr;
-
-out_err_free:
-	nfs4_fl_free_deviceid(dsaddr);
-out_err:
-	dprintk("%s ERROR: returning NULL\n", __func__);
-	return NULL;
-}
-
-/*
- * Decode the opaque device specified in 'dev'
- * and add it to the list of available devices.
- * If the deviceid is already cached, nfs4_add_deviceid will return
- * a pointer to the cached struct and throw away the new.
- */
-static struct nfs4_file_layout_dsaddr*
-decode_and_add_device(struct inode *inode, struct pnfs_device *dev)
-{
-	struct nfs4_file_layout_dsaddr *dsaddr;
-	struct pnfs_deviceid_node *d;
-
-	dsaddr = decode_device(inode, dev);
-	if (!dsaddr) {
-		printk(KERN_WARNING "%s: Could not decode or add device\n",
-			__func__);
-		return NULL;
-	}
-
-	d = pnfs_add_deviceid(NFS_SERVER(inode)->nfs_client->cl_devid_cache,
-			      &dsaddr->deviceid);
-
-	return container_of(d, struct nfs4_file_layout_dsaddr, deviceid);
-}
-
-/*
- * Retrieve the information for dev_id, add it to the list
- * of available devices, and return it.
- */
-struct nfs4_file_layout_dsaddr *
-get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id)
-{
-	struct pnfs_device *pdev = NULL;
-	u32 max_resp_sz;
-	int max_pages;
-	struct page **pages = NULL;
-	struct nfs4_file_layout_dsaddr *dsaddr = NULL;
-	int rc, i;
-	struct nfs_server *server = NFS_SERVER(inode);
-
-	/*
-	 * Use the session max response size as the basis for setting
-	 * GETDEVICEINFO's maxcount
-	 */
-	max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
-	max_pages = max_resp_sz >> PAGE_SHIFT;
-	dprintk("%s inode %p max_resp_sz %u max_pages %d\n",
-		__func__, inode, max_resp_sz, max_pages);
-
-	pdev = kzalloc(sizeof(struct pnfs_device), GFP_KERNEL);
-	if (pdev == NULL)
-		return NULL;
-
-	pages = kzalloc(max_pages * sizeof(struct page *), GFP_KERNEL);
-	if (pages == NULL) {
-		kfree(pdev);
-		return NULL;
-	}
-	for (i = 0; i < max_pages; i++) {
-		pages[i] = alloc_page(GFP_KERNEL);
-		if (!pages[i])
-			goto out_free;
-	}
-
-	/* set pdev->area */
-	pdev->area = vmap(pages, max_pages, VM_MAP, PAGE_KERNEL);
-	if (!pdev->area)
-		goto out_free;
-
-	memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id));
-	pdev->layout_type = LAYOUT_NFSV4_1_FILES;
-	pdev->pages = pages;
-	pdev->pgbase = 0;
-	pdev->pglen = PAGE_SIZE * max_pages;
-	pdev->mincount = 0;
-
-	rc = nfs4_proc_getdeviceinfo(server, pdev);
-	dprintk("%s getdevice info returns %d\n", __func__, rc);
-	if (rc)
-		goto out_free;
-
-	/*
-	 * Found new device, need to decode it and then add it to the
-	 * list of known devices for this mountpoint.
-	 */
-	dsaddr = decode_and_add_device(inode, pdev);
-out_free:
-	if (pdev->area != NULL)
-		vunmap(pdev->area);
-	for (i = 0; i < max_pages; i++)
-		__free_page(pages[i]);
-	kfree(pages);
-	kfree(pdev);
-	dprintk("<-- %s dsaddr %p\n", __func__, dsaddr);
-	return dsaddr;
-}
-
-struct nfs4_file_layout_dsaddr *
-nfs4_fl_find_get_deviceid(struct nfs_client *clp, struct nfs4_deviceid *id)
-{
-	struct pnfs_deviceid_node *d;
-
-	d = pnfs_find_get_deviceid(clp->cl_devid_cache, id);
-	return (d == NULL) ? NULL :
-		container_of(d, struct nfs4_file_layout_dsaddr, deviceid);
-}