[mirror_ubuntu-bionic-kernel.git] / fs / nfs / nfs42proc.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
 */
#include <linux/fs.h>
#include <linux/sunrpc/sched.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/nfs_xdr.h>
#include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "nfs42.h"
#include "iostat.h"
#include "pnfs.h"
#include "nfs4session.h"
#include "internal.h"

#define NFSDBG_FACILITY NFSDBG_PROC

static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs42_falloc_args args = {
		.falloc_fh	= NFS_FH(inode),
		.falloc_offset	= offset,
		.falloc_length	= len,
		.falloc_bitmask	= server->cache_consistency_bitmask,
	};
	struct nfs42_falloc_res res = {
		.falloc_server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
			lock, FMODE_WRITE);
	if (status)
		return status;

	res.falloc_fattr = nfs_alloc_fattr();
	if (!res.falloc_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(inode, res.falloc_fattr);

	kfree(res.falloc_fattr);
	return status;
}

static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				loff_t offset, loff_t len)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	int err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}

int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
		return -EOPNOTSUPP;

	inode_lock(inode);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;

	inode_unlock(inode);
	return err;
}

int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
		return -EOPNOTSUPP;

	inode_lock(inode);
	err = nfs_sync_inode(inode);
	if (err)
		goto out_unlock;

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == 0)
		truncate_pagecache_range(inode, offset, (offset + len) -1);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
out_unlock:
	inode_unlock(inode);
	return err;
}

static ssize_t _nfs42_proc_copy(struct file *src,
				struct nfs_lock_context *src_lock,
				struct file *dst,
				struct nfs_lock_context *dst_lock,
				struct nfs42_copy_args *args,
				struct nfs42_copy_res *res)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
		.rpc_argp = args,
		.rpc_resp = res,
	};
	struct inode *dst_inode = file_inode(dst);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	loff_t pos_src = args->src_pos;
	loff_t pos_dst = args->dst_pos;
	size_t count = args->count;
	ssize_t status;

	status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
				     src_lock, FMODE_READ);
	if (status)
		return status;

	status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
			pos_src, pos_src + (loff_t)count - 1);
	if (status)
		return status;

	status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
				     dst_lock, FMODE_WRITE);
	if (status)
		return status;

	status = nfs_sync_inode(dst_inode);
	if (status)
		return status;

	res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
	if (!res->commit_res.verf)
		return -ENOMEM;
	status = nfs4_call_sync(server->client, server, &msg,
				&args->seq_args, &res->seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_COPY;
	if (status)
		goto out;

	if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
				    &res->commit_res.verf->verifier)) {
		status = -EAGAIN;
		goto out;
	}

	truncate_pagecache_range(dst_inode, pos_dst,
				 pos_dst + res->write_res.count);

	status = res->write_res.count;
out:
	kfree(res->commit_res.verf);
	return status;
}

ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
			struct file *dst, loff_t pos_dst,
			size_t count)
{
	struct nfs_server *server = NFS_SERVER(file_inode(dst));
	struct nfs_lock_context *src_lock;
	struct nfs_lock_context *dst_lock;
	struct nfs42_copy_args args = {
		.src_fh		= NFS_FH(file_inode(src)),
		.src_pos	= pos_src,
		.dst_fh		= NFS_FH(file_inode(dst)),
		.dst_pos	= pos_dst,
		.count		= count,
	};
	struct nfs42_copy_res res;
	struct nfs4_exception src_exception = {
		.inode		= file_inode(src),
		.stateid	= &args.src_stateid,
	};
	struct nfs4_exception dst_exception = {
		.inode		= file_inode(dst),
		.stateid	= &args.dst_stateid,
	};
	ssize_t err, err2;

	if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
		return -EOPNOTSUPP;

	src_lock = nfs_get_lock_context(nfs_file_open_context(src));
	if (IS_ERR(src_lock))
		return PTR_ERR(src_lock);

	src_exception.state = src_lock->open_context->state;

	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
	if (IS_ERR(dst_lock)) {
		err = PTR_ERR(dst_lock);
		goto out_put_src_lock;
	}

	dst_exception.state = dst_lock->open_context->state;

	do {
		inode_lock(file_inode(dst));
		err = _nfs42_proc_copy(src, src_lock,
				dst, dst_lock,
				&args, &res);
		inode_unlock(file_inode(dst));

		if (err >= 0)
			break;
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		} if (err == -EAGAIN) {
			dst_exception.retry = 1;
			continue;
		}

		err2 = nfs4_handle_exception(server, err, &src_exception);
		err  = nfs4_handle_exception(server, err, &dst_exception);
		if (!err)
			err = err2;
	} while (src_exception.retry || dst_exception.retry);

	nfs_put_lock_context(dst_lock);
out_put_src_lock:
	nfs_put_lock_context(src_lock);
	return err;
}

static loff_t _nfs42_proc_llseek(struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, int whence)
{
	struct inode *inode = file_inode(filep);
	struct nfs42_seek_args args = {
		.sa_fh		= NFS_FH(inode),
		.sa_offset	= offset,
		.sa_what	= (whence == SEEK_HOLE) ?
					NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	};
	struct nfs42_seek_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct nfs_server *server = NFS_SERVER(inode);
	int status;

	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
		return -ENOTSUPP;

	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
			lock, FMODE_READ);
	if (status)
		return status;

	status = nfs_filemap_write_and_wait_range(inode->i_mapping,
			offset, LLONG_MAX);
	if (status)
		return status;

	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_SEEK;
	if (status)
		return status;

	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}

loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	loff_t err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_llseek(filep, lock, offset, whence);
		if (err >= 0)
			break;
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}


static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct inode *inode = data->inode;
	struct nfs_server *server = NFS_SERVER(inode);
	struct pnfs_layout_hdr *lo;

	spin_lock(&inode->i_lock);
	lo = NFS_I(inode)->layout;
	if (!pnfs_layout_is_valid(lo)) {
		spin_unlock(&inode->i_lock);
		rpc_exit(task, 0);
		return;
	}
	nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
	spin_unlock(&inode->i_lock);
	nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
			    &data->res.seq_res, task);
}

static void
nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct inode *inode = data->inode;
	struct pnfs_layout_hdr *lo;

	if (!nfs4_sequence_done(task, &data->res.seq_res))
		return;

	switch (task->tk_status) {
	case 0:
		break;
	case -NFS4ERR_EXPIRED:
	case -NFS4ERR_ADMIN_REVOKED:
	case -NFS4ERR_DELEG_REVOKED:
	case -NFS4ERR_STALE_STATEID:
	case -NFS4ERR_BAD_STATEID:
		spin_lock(&inode->i_lock);
		lo = NFS_I(inode)->layout;
		if (pnfs_layout_is_valid(lo) &&
		    nfs4_stateid_match(&data->args.stateid,
					     &lo->plh_stateid)) {
			LIST_HEAD(head);

			/*
			 * Mark the bad layout state as invalid, then retry
			 * with the current stateid.
			 */
			pnfs_mark_layout_stateid_invalid(lo, &head);
			spin_unlock(&inode->i_lock);
			pnfs_free_lseg_list(&head);
			nfs_commit_inode(inode, 0);
		} else
			spin_unlock(&inode->i_lock);
		break;
	case -NFS4ERR_OLD_STATEID:
		spin_lock(&inode->i_lock);
		lo = NFS_I(inode)->layout;
		if (pnfs_layout_is_valid(lo) &&
		    nfs4_stateid_match_other(&data->args.stateid,
					&lo->plh_stateid)) {
			/* Do we need to delay before resending? */
			if (!nfs4_stateid_is_newer(&lo->plh_stateid,
						&data->args.stateid))
				rpc_delay(task, HZ);
			rpc_restart_call_prepare(task);
		}
		spin_unlock(&inode->i_lock);
		break;
	case -ENOTSUPP:
	case -EOPNOTSUPP:
		NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
	}
}

static void
nfs42_layoutstat_release(void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
	int i;

	for (i = 0; i < data->args.num_dev; i++) {
		if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
			devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
	}

	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
	smp_mb__before_atomic();
	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	smp_mb__after_atomic();
	nfs_iput_and_deactive(data->inode);
	kfree(data->args.devinfo);
	kfree(data);
}

static const struct rpc_call_ops nfs42_layoutstat_ops = {
	.rpc_call_prepare = nfs42_layoutstat_prepare,
	.rpc_call_done = nfs42_layoutstat_done,
	.rpc_release = nfs42_layoutstat_release,
};

int nfs42_proc_layoutstats_generic(struct nfs_server *server,
				   struct nfs42_layoutstat_data *data)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
		.rpc_argp = &data->args,
		.rpc_resp = &data->res,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = server->client,
		.rpc_message = &msg,
		.callback_ops = &nfs42_layoutstat_ops,
		.callback_data = data,
		.flags = RPC_TASK_ASYNC,
	};
	struct rpc_task *task;

	data->inode = nfs_igrab_and_active(data->args.inode);
	if (!data->inode) {
		nfs42_layoutstat_release(data);
		return -EAGAIN;
	}
	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	task = rpc_run_task(&task_setup);
	if (IS_ERR(task))
		return PTR_ERR(task);
	rpc_put_task(task);
	return 0;
}

static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
		struct file *dst_f, struct nfs_lock_context *src_lock,
		struct nfs_lock_context *dst_lock, loff_t src_offset,
		loff_t dst_offset, loff_t count)
{
	struct inode *src_inode = file_inode(src_f);
	struct inode *dst_inode = file_inode(dst_f);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	struct nfs42_clone_args args = {
		.src_fh = NFS_FH(src_inode),
		.dst_fh = NFS_FH(dst_inode),
		.src_offset = src_offset,
		.dst_offset = dst_offset,
		.count = count,
		.dst_bitmask = server->cache_consistency_bitmask,
	};
	struct nfs42_clone_res res = {
		.server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
			src_lock, FMODE_READ);
	if (status)
		return status;

	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
			dst_lock, FMODE_WRITE);
	if (status)
		return status;

	res.dst_fattr = nfs_alloc_fattr();
	if (!res.dst_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);

	kfree(res.dst_fattr);
	return status;
}

int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
		     loff_t src_offset, loff_t dst_offset, loff_t count)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	};
	struct inode *inode = file_inode(src_f);
	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
	struct nfs_lock_context *src_lock;
	struct nfs_lock_context *dst_lock;
	struct nfs4_exception src_exception = { };
	struct nfs4_exception dst_exception = { };
	int err, err2;

	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
		return -EOPNOTSUPP;

	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	if (IS_ERR(src_lock))
		return PTR_ERR(src_lock);

	src_exception.inode = file_inode(src_f);
	src_exception.state = src_lock->open_context->state;

	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	if (IS_ERR(dst_lock)) {
		err = PTR_ERR(dst_lock);
		goto out_put_src_lock;
	}

	dst_exception.inode = file_inode(dst_f);
	dst_exception.state = dst_lock->open_context->state;

	do {
		err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
					src_offset, dst_offset, count);
		if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
			NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
			err = -EOPNOTSUPP;
			break;
		}

		err2 = nfs4_handle_exception(server, err, &src_exception);
		err = nfs4_handle_exception(server, err, &dst_exception);
		if (!err)
			err = err2;
	} while (src_exception.retry || dst_exception.retry);

	nfs_put_lock_context(dst_lock);
out_put_src_lock:
	nfs_put_lock_context(src_lock);
	return err;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1c6dcbe5 AS	2	/*
	3	* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
	4	*/
	5	#include <linux/fs.h>
	6	#include <linux/sunrpc/sched.h>
	7	#include <linux/nfs.h>
	8	#include <linux/nfs3.h>
	9	#include <linux/nfs4.h>
	10	#include <linux/nfs_xdr.h>
	11	#include <linux/nfs_fs.h>
	12	#include "nfs4_fs.h"
	13	#include "nfs42.h"
1b4a4bd8 PT	14	#include "iostat.h"
1b4a4bd8 PT	15	#include "pnfs.h"
efc6f4aa	16	#include "nfs4session.h"
1b4a4bd8 PT	17	#include "internal.h"
1b4a4bd8 PT	18
291e1b94	19	#define NFSDBG_FACILITY NFSDBG_PROC
1c6dcbe5	20
f4ac1674	21	static int _nfs42_proc_fallocate(struct rpc_message msg, struct file filep,
4bdf87eb	22	struct nfs_lock_context *lock, loff_t offset, loff_t len)
f4ac1674 AS	23	{
f4ac1674 AS	24	struct inode *inode = file_inode(filep);
9a51940b	25	struct nfs_server *server = NFS_SERVER(inode);
f4ac1674 AS	26	struct nfs42_falloc_args args = {
	27	.falloc_fh = NFS_FH(inode),
	28	.falloc_offset = offset,
	29	.falloc_length = len,
9a51940b AS	30	.falloc_bitmask = server->cache_consistency_bitmask,
	31	};
	32	struct nfs42_falloc_res res = {
	33	.falloc_server = server,
f4ac1674	34	};
f4ac1674 AS	35	int status;
	36
	37	msg->rpc_argp = &args;
	38	msg->rpc_resp = &res;
	39
4bdf87eb CH	40	status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
4bdf87eb CH	41	lock, FMODE_WRITE);
f4ac1674 AS	42	if (status)
	43	return status;
	44
9a51940b AS	45	res.falloc_fattr = nfs_alloc_fattr();
	46	if (!res.falloc_fattr)
	47	return -ENOMEM;
	48
	49	status = nfs4_call_sync(server->client, server, msg,
	50	&args.seq_args, &res.seq_res, 0);
	51	if (status == 0)
	52	status = nfs_post_op_update_inode(inode, res.falloc_fattr);
	53
	54	kfree(res.falloc_fattr);
	55	return status;
f4ac1674 AS	56	}
	57
	58	static int nfs42_proc_fallocate(struct rpc_message msg, struct file filep,
	59	loff_t offset, loff_t len)
	60	{
	61	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	62	struct nfs4_exception exception = { };
4bdf87eb	63	struct nfs_lock_context *lock;
f4ac1674 AS	64	int err;
f4ac1674 AS	65
4bdf87eb CH	66	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	67	if (IS_ERR(lock))
	68	return PTR_ERR(lock);
	69
	70	exception.inode = file_inode(filep);
	71	exception.state = lock->open_context->state;
	72
f4ac1674	73	do {
4bdf87eb CH	74	err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
	75	if (err == -ENOTSUPP) {
	76	err = -EOPNOTSUPP;
	77	break;
	78	}
f4ac1674 AS	79	err = nfs4_handle_exception(server, err, &exception);
	80	} while (exception.retry);
	81
4bdf87eb	82	nfs_put_lock_context(lock);
f4ac1674 AS	83	return err;
	84	}
	85
	86	int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
	87	{
	88	struct rpc_message msg = {
	89	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	90	};
	91	struct inode *inode = file_inode(filep);
	92	int err;
	93
	94	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
	95	return -EOPNOTSUPP;
	96
5955102c	97	inode_lock(inode);
f830f7dd	98
f4ac1674 AS	99	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	100	if (err == -EOPNOTSUPP)
	101	NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
f830f7dd	102
5955102c	103	inode_unlock(inode);
f4ac1674 AS	104	return err;
	105	}
	106
624bd5b7 AS	107	int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
	108	{
	109	struct rpc_message msg = {
	110	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	111	};
	112	struct inode *inode = file_inode(filep);
	113	int err;
	114
	115	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
	116	return -EOPNOTSUPP;
	117
5955102c	118	inode_lock(inode);
1e564d3d TM	119	err = nfs_sync_inode(inode);
	120	if (err)
	121	goto out_unlock;
f830f7dd	122
624bd5b7	123	err = nfs42_proc_fallocate(&msg, filep, offset, len);
9a51940b AS	124	if (err == 0)
9a51940b AS	125	truncate_pagecache_range(inode, offset, (offset + len) -1);
624bd5b7 AS	126	if (err == -EOPNOTSUPP)
624bd5b7 AS	127	NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
1e564d3d	128	out_unlock:
5955102c	129	inode_unlock(inode);
624bd5b7 AS	130	return err;
	131	}
	132
9d8cacbf	133	static ssize_t _nfs42_proc_copy(struct file *src,
2e72448b	134	struct nfs_lock_context *src_lock,
9d8cacbf	135	struct file *dst,
2e72448b	136	struct nfs_lock_context *dst_lock,
9d8cacbf TM	137	struct nfs42_copy_args *args,
9d8cacbf TM	138	struct nfs42_copy_res *res)
2e72448b	139	{
2e72448b AS	140	struct rpc_message msg = {
2e72448b AS	141	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
9d8cacbf TM	142	.rpc_argp = args,
9d8cacbf TM	143	.rpc_resp = res,
2e72448b AS	144	};
	145	struct inode *dst_inode = file_inode(dst);
	146	struct nfs_server *server = NFS_SERVER(dst_inode);
9d8cacbf TM	147	loff_t pos_src = args->src_pos;
	148	loff_t pos_dst = args->dst_pos;
	149	size_t count = args->count;
1ee48bdd	150	ssize_t status;
2e72448b	151
9d8cacbf	152	status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
2e72448b AS	153	src_lock, FMODE_READ);
	154	if (status)
	155	return status;
	156
837bb1d7 TM	157	status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
	158	pos_src, pos_src + (loff_t)count - 1);
	159	if (status)
	160	return status;
	161
9d8cacbf	162	status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
2e72448b AS	163	dst_lock, FMODE_WRITE);
	164	if (status)
	165	return status;
837bb1d7 TM	166
	167	status = nfs_sync_inode(dst_inode);
	168	if (status)
	169	return status;
2e72448b	170
e0926934 OK	171	res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
	172	if (!res->commit_res.verf)
	173	return -ENOMEM;
2e72448b	174	status = nfs4_call_sync(server->client, server, &msg,
9d8cacbf	175	&args->seq_args, &res->seq_res, 0);
2e72448b AS	176	if (status == -ENOTSUPP)
	177	server->caps &= ~NFS_CAP_COPY;
	178	if (status)
e0926934	179	goto out;
2e72448b	180
6d3b5d8d	181	if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
e0926934 OK	182	&res->commit_res.verf->verifier)) {
	183	status = -EAGAIN;
	184	goto out;
2e72448b AS	185	}
	186
	187	truncate_pagecache_range(dst_inode, pos_dst,
9d8cacbf	188	pos_dst + res->write_res.count);
2e72448b	189
e0926934 OK	190	status = res->write_res.count;
	191	out:
	192	kfree(res->commit_res.verf);
	193	return status;
2e72448b AS	194	}
	195
	196	ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
	197	struct file *dst, loff_t pos_dst,
	198	size_t count)
	199	{
	200	struct nfs_server *server = NFS_SERVER(file_inode(dst));
	201	struct nfs_lock_context *src_lock;
	202	struct nfs_lock_context *dst_lock;
9d8cacbf TM	203	struct nfs42_copy_args args = {
	204	.src_fh = NFS_FH(file_inode(src)),
	205	.src_pos = pos_src,
	206	.dst_fh = NFS_FH(file_inode(dst)),
	207	.dst_pos = pos_dst,
	208	.count = count,
	209	};
	210	struct nfs42_copy_res res;
	211	struct nfs4_exception src_exception = {
	212	.inode = file_inode(src),
	213	.stateid = &args.src_stateid,
	214	};
	215	struct nfs4_exception dst_exception = {
	216	.inode = file_inode(dst),
	217	.stateid = &args.dst_stateid,
	218	};
2e72448b AS	219	ssize_t err, err2;
	220
	221	if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
	222	return -EOPNOTSUPP;
	223
	224	src_lock = nfs_get_lock_context(nfs_file_open_context(src));
	225	if (IS_ERR(src_lock))
	226	return PTR_ERR(src_lock);
	227
2e72448b AS	228	src_exception.state = src_lock->open_context->state;
	229
	230	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
	231	if (IS_ERR(dst_lock)) {
	232	err = PTR_ERR(dst_lock);
	233	goto out_put_src_lock;
	234	}
	235
2e72448b AS	236	dst_exception.state = dst_lock->open_context->state;
	237
	238	do {
ea8ea737	239	inode_lock(file_inode(dst));
9d8cacbf TM	240	err = _nfs42_proc_copy(src, src_lock,
	241	dst, dst_lock,
	242	&args, &res);
ea8ea737	243	inode_unlock(file_inode(dst));
2e72448b	244
9d8cacbf TM	245	if (err >= 0)
9d8cacbf TM	246	break;
2e72448b AS	247	if (err == -ENOTSUPP) {
	248	err = -EOPNOTSUPP;
	249	break;
e0926934 OK	250	} if (err == -EAGAIN) {
	251	dst_exception.retry = 1;
	252	continue;
2e72448b AS	253	}
	254
	255	err2 = nfs4_handle_exception(server, err, &src_exception);
	256	err = nfs4_handle_exception(server, err, &dst_exception);
	257	if (!err)
	258	err = err2;
	259	} while (src_exception.retry \|\| dst_exception.retry);
	260
	261	nfs_put_lock_context(dst_lock);
	262	out_put_src_lock:
	263	nfs_put_lock_context(src_lock);
	264	return err;
	265	}
	266
4bdf87eb CH	267	static loff_t _nfs42_proc_llseek(struct file *filep,
4bdf87eb CH	268	struct nfs_lock_context *lock, loff_t offset, int whence)
1c6dcbe5 AS	269	{
	270	struct inode *inode = file_inode(filep);
	271	struct nfs42_seek_args args = {
	272	.sa_fh = NFS_FH(inode),
	273	.sa_offset = offset,
	274	.sa_what = (whence == SEEK_HOLE) ?
	275	NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	276	};
	277	struct nfs42_seek_res res;
	278	struct rpc_message msg = {
	279	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
	280	.rpc_argp = &args,
	281	.rpc_resp = &res,
	282	};
	283	struct nfs_server *server = NFS_SERVER(inode);
	284	int status;
	285
878ffa9f	286	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
1c6dcbe5 AS	287	return -ENOTSUPP;
1c6dcbe5 AS	288
4bdf87eb CH	289	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
4bdf87eb CH	290	lock, FMODE_READ);
1c6dcbe5 AS	291	if (status)
	292	return status;
	293
e95fc4a0 TM	294	status = nfs_filemap_write_and_wait_range(inode->i_mapping,
	295	offset, LLONG_MAX);
	296	if (status)
	297	return status;
	298
1c6dcbe5 AS	299	status = nfs4_call_sync(server->client, server, &msg,
	300	&args.seq_args, &res.seq_res, 0);
	301	if (status == -ENOTSUPP)
	302	server->caps &= ~NFS_CAP_SEEK;
	303	if (status)
	304	return status;
	305
	306	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
	307	}
be3a5d23	308
bdcc2cd1 BF	309	loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
	310	{
	311	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	312	struct nfs4_exception exception = { };
4bdf87eb	313	struct nfs_lock_context *lock;
306a5549	314	loff_t err;
bdcc2cd1	315
4bdf87eb CH	316	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	317	if (IS_ERR(lock))
	318	return PTR_ERR(lock);
	319
	320	exception.inode = file_inode(filep);
	321	exception.state = lock->open_context->state;
	322
bdcc2cd1	323	do {
4bdf87eb	324	err = _nfs42_proc_llseek(filep, lock, offset, whence);
306a5549 BF	325	if (err >= 0)
306a5549 BF	326	break;
4bdf87eb CH	327	if (err == -ENOTSUPP) {
	328	err = -EOPNOTSUPP;
	329	break;
	330	}
bdcc2cd1 BF	331	err = nfs4_handle_exception(server, err, &exception);
	332	} while (exception.retry);
	333
4bdf87eb	334	nfs_put_lock_context(lock);
bdcc2cd1 BF	335	return err;
	336	}
	337
	338
1b4a4bd8 PT	339	static void
	340	nfs42_layoutstat_prepare(struct rpc_task task, void calldata)
	341	{
	342	struct nfs42_layoutstat_data *data = calldata;
9a0fe867 TM	343	struct inode *inode = data->inode;
	344	struct nfs_server *server = NFS_SERVER(inode);
	345	struct pnfs_layout_hdr *lo;
1b4a4bd8	346
9a0fe867 TM	347	spin_lock(&inode->i_lock);
	348	lo = NFS_I(inode)->layout;
	349	if (!pnfs_layout_is_valid(lo)) {
	350	spin_unlock(&inode->i_lock);
	351	rpc_exit(task, 0);
	352	return;
	353	}
	354	nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
	355	spin_unlock(&inode->i_lock);
6de7e12f AS	356	nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6de7e12f AS	357	&data->res.seq_res, task);
1b4a4bd8 PT	358	}
	359
	360	static void
	361	nfs42_layoutstat_done(struct rpc_task task, void calldata)
	362	{
	363	struct nfs42_layoutstat_data *data = calldata;
68d264cf PT	364	struct inode *inode = data->inode;
68d264cf PT	365	struct pnfs_layout_hdr *lo;
1b4a4bd8 PT	366
	367	if (!nfs4_sequence_done(task, &data->res.seq_res))
	368	return;
	369
6c5a0d89 TM	370	switch (task->tk_status) {
	371	case 0:
	372	break;
68d264cf	373	case -NFS4ERR_EXPIRED:
206b3bb5 TM	374	case -NFS4ERR_ADMIN_REVOKED:
206b3bb5 TM	375	case -NFS4ERR_DELEG_REVOKED:
68d264cf	376	case -NFS4ERR_STALE_STATEID:
68d264cf PT	377	case -NFS4ERR_BAD_STATEID:
	378	spin_lock(&inode->i_lock);
	379	lo = NFS_I(inode)->layout;
9a0fe867 TM	380	if (pnfs_layout_is_valid(lo) &&
9a0fe867 TM	381	nfs4_stateid_match(&data->args.stateid,
68d264cf PT	382	&lo->plh_stateid)) {
	383	LIST_HEAD(head);
	384
	385	/*
	386	* Mark the bad layout state as invalid, then retry
	387	* with the current stateid.
	388	*/
5f46be04	389	pnfs_mark_layout_stateid_invalid(lo, &head);
68d264cf PT	390	spin_unlock(&inode->i_lock);
68d264cf PT	391	pnfs_free_lseg_list(&head);
1f18b82c	392	nfs_commit_inode(inode, 0);
68d264cf PT	393	} else
	394	spin_unlock(&inode->i_lock);
	395	break;
9a0fe867 TM	396	case -NFS4ERR_OLD_STATEID:
	397	spin_lock(&inode->i_lock);
	398	lo = NFS_I(inode)->layout;
	399	if (pnfs_layout_is_valid(lo) &&
	400	nfs4_stateid_match_other(&data->args.stateid,
	401	&lo->plh_stateid)) {
	402	/* Do we need to delay before resending? */
	403	if (!nfs4_stateid_is_newer(&lo->plh_stateid,
	404	&data->args.stateid))
	405	rpc_delay(task, HZ);
	406	rpc_restart_call_prepare(task);
	407	}
	408	spin_unlock(&inode->i_lock);
	409	break;
6c5a0d89 TM	410	case -ENOTSUPP:
6c5a0d89 TM	411	case -EOPNOTSUPP:
68d264cf	412	NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
6c5a0d89	413	}
1b4a4bd8 PT	414	}
	415
	416	static void
	417	nfs42_layoutstat_release(void *calldata)
	418	{
	419	struct nfs42_layoutstat_data *data = calldata;
422c93c8 TM	420	struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
422c93c8 TM	421	int i;
8733408d	422
422c93c8 TM	423	for (i = 0; i < data->args.num_dev; i++) {
	424	if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
	425	devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
	426	}
1b4a4bd8 PT	427
1b4a4bd8 PT	428	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
1bfe3b25 PT	429	smp_mb__before_atomic();
	430	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	431	smp_mb__after_atomic();
1b4a4bd8 PT	432	nfs_iput_and_deactive(data->inode);
	433	kfree(data->args.devinfo);
	434	kfree(data);
	435	}
	436
be3a5d23	437	static const struct rpc_call_ops nfs42_layoutstat_ops = {
1b4a4bd8 PT	438	.rpc_call_prepare = nfs42_layoutstat_prepare,
	439	.rpc_call_done = nfs42_layoutstat_done,
	440	.rpc_release = nfs42_layoutstat_release,
be3a5d23 TM	441	};
	442
	443	int nfs42_proc_layoutstats_generic(struct nfs_server *server,
	444	struct nfs42_layoutstat_data *data)
	445	{
	446	struct rpc_message msg = {
	447	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
	448	.rpc_argp = &data->args,
	449	.rpc_resp = &data->res,
	450	};
	451	struct rpc_task_setup task_setup = {
	452	.rpc_client = server->client,
	453	.rpc_message = &msg,
	454	.callback_ops = &nfs42_layoutstat_ops,
	455	.callback_data = data,
	456	.flags = RPC_TASK_ASYNC,
	457	};
	458	struct rpc_task *task;
	459
1b4a4bd8 PT	460	data->inode = nfs_igrab_and_active(data->args.inode);
	461	if (!data->inode) {
	462	nfs42_layoutstat_release(data);
	463	return -EAGAIN;
	464	}
be3a5d23 TM	465	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	466	task = rpc_run_task(&task_setup);
	467	if (IS_ERR(task))
	468	return PTR_ERR(task);
3f807e5a	469	rpc_put_task(task);
be3a5d23 TM	470	return 0;
be3a5d23 TM	471	}
e5341f3a PT	472
e5341f3a PT	473	static int _nfs42_proc_clone(struct rpc_message msg, struct file src_f,
4bdf87eb CH	474	struct file dst_f, struct nfs_lock_context src_lock,
	475	struct nfs_lock_context *dst_lock, loff_t src_offset,
	476	loff_t dst_offset, loff_t count)
e5341f3a PT	477	{
	478	struct inode *src_inode = file_inode(src_f);
	479	struct inode *dst_inode = file_inode(dst_f);
	480	struct nfs_server *server = NFS_SERVER(dst_inode);
	481	struct nfs42_clone_args args = {
	482	.src_fh = NFS_FH(src_inode),
	483	.dst_fh = NFS_FH(dst_inode),
	484	.src_offset = src_offset,
	485	.dst_offset = dst_offset,
9494b2ce	486	.count = count,
e5341f3a PT	487	.dst_bitmask = server->cache_consistency_bitmask,
	488	};
	489	struct nfs42_clone_res res = {
	490	.server = server,
	491	};
	492	int status;
	493
	494	msg->rpc_argp = &args;
	495	msg->rpc_resp = &res;
	496
4bdf87eb CH	497	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
4bdf87eb CH	498	src_lock, FMODE_READ);
e5341f3a PT	499	if (status)
	500	return status;
	501
4bdf87eb CH	502	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
4bdf87eb CH	503	dst_lock, FMODE_WRITE);
e5341f3a PT	504	if (status)
	505	return status;
	506
	507	res.dst_fattr = nfs_alloc_fattr();
	508	if (!res.dst_fattr)
	509	return -ENOMEM;
	510
	511	status = nfs4_call_sync(server->client, server, msg,
	512	&args.seq_args, &res.seq_res, 0);
	513	if (status == 0)
	514	status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
	515
	516	kfree(res.dst_fattr);
	517	return status;
	518	}
	519
	520	int nfs42_proc_clone(struct file src_f, struct file dst_f,
	521	loff_t src_offset, loff_t dst_offset, loff_t count)
	522	{
	523	struct rpc_message msg = {
	524	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	525	};
	526	struct inode *inode = file_inode(src_f);
	527	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
4bdf87eb CH	528	struct nfs_lock_context *src_lock;
	529	struct nfs_lock_context *dst_lock;
	530	struct nfs4_exception src_exception = { };
	531	struct nfs4_exception dst_exception = { };
	532	int err, err2;
e5341f3a PT	533
	534	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
	535	return -EOPNOTSUPP;
	536
4bdf87eb CH	537	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	538	if (IS_ERR(src_lock))
	539	return PTR_ERR(src_lock);
	540
	541	src_exception.inode = file_inode(src_f);
	542	src_exception.state = src_lock->open_context->state;
	543
	544	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	545	if (IS_ERR(dst_lock)) {
	546	err = PTR_ERR(dst_lock);
	547	goto out_put_src_lock;
	548	}
	549
	550	dst_exception.inode = file_inode(dst_f);
	551	dst_exception.state = dst_lock->open_context->state;
	552
e5341f3a	553	do {
4bdf87eb CH	554	err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
4bdf87eb CH	555	src_offset, dst_offset, count);
e5341f3a PT	556	if (err == -ENOTSUPP \|\| err == -EOPNOTSUPP) {
e5341f3a PT	557	NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
4bdf87eb CH	558	err = -EOPNOTSUPP;
4bdf87eb CH	559	break;
e5341f3a	560	}
e5341f3a	561
4bdf87eb CH	562	err2 = nfs4_handle_exception(server, err, &src_exception);
	563	err = nfs4_handle_exception(server, err, &dst_exception);
	564	if (!err)
	565	err = err2;
	566	} while (src_exception.retry \|\| dst_exception.retry);
e5341f3a	567
4bdf87eb CH	568	nfs_put_lock_context(dst_lock);
	569	out_put_src_lock:
	570	nfs_put_lock_context(src_lock);
	571	return err;
e5341f3a	572	}