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

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