[mirror_ubuntu-bionic-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;
	int 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;

	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)
		return status;

	if (res->write_res.verifier.committed != NFS_FILE_SYNC) {
		status = nfs_commit_file(dst, &res->write_res.verifier.verifier);
		if (status)
			return status;
	}

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

	return res->write_res.count;
}

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;
		}

		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);
		} 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;
2e72448b AS	149	int status;
2e72448b AS	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 AS	169
2e72448b AS	170	status = nfs4_call_sync(server->client, server, &msg,
9d8cacbf	171	&args->seq_args, &res->seq_res, 0);
2e72448b AS	172	if (status == -ENOTSUPP)
	173	server->caps &= ~NFS_CAP_COPY;
	174	if (status)
	175	return status;
	176
9d8cacbf TM	177	if (res->write_res.verifier.committed != NFS_FILE_SYNC) {
9d8cacbf TM	178	status = nfs_commit_file(dst, &res->write_res.verifier.verifier);
2e72448b AS	179	if (status)
	180	return status;
	181	}
	182
	183	truncate_pagecache_range(dst_inode, pos_dst,
9d8cacbf	184	pos_dst + res->write_res.count);
2e72448b	185
9d8cacbf	186	return res->write_res.count;
2e72448b AS	187	}
	188
	189	ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
	190	struct file *dst, loff_t pos_dst,
	191	size_t count)
	192	{
	193	struct nfs_server *server = NFS_SERVER(file_inode(dst));
	194	struct nfs_lock_context *src_lock;
	195	struct nfs_lock_context *dst_lock;
9d8cacbf TM	196	struct nfs42_copy_args args = {
	197	.src_fh = NFS_FH(file_inode(src)),
	198	.src_pos = pos_src,
	199	.dst_fh = NFS_FH(file_inode(dst)),
	200	.dst_pos = pos_dst,
	201	.count = count,
	202	};
	203	struct nfs42_copy_res res;
	204	struct nfs4_exception src_exception = {
	205	.inode = file_inode(src),
	206	.stateid = &args.src_stateid,
	207	};
	208	struct nfs4_exception dst_exception = {
	209	.inode = file_inode(dst),
	210	.stateid = &args.dst_stateid,
	211	};
2e72448b AS	212	ssize_t err, err2;
	213
	214	if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
	215	return -EOPNOTSUPP;
	216
	217	src_lock = nfs_get_lock_context(nfs_file_open_context(src));
	218	if (IS_ERR(src_lock))
	219	return PTR_ERR(src_lock);
	220
2e72448b AS	221	src_exception.state = src_lock->open_context->state;
	222
	223	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
	224	if (IS_ERR(dst_lock)) {
	225	err = PTR_ERR(dst_lock);
	226	goto out_put_src_lock;
	227	}
	228
2e72448b AS	229	dst_exception.state = dst_lock->open_context->state;
	230
	231	do {
ea8ea737	232	inode_lock(file_inode(dst));
9d8cacbf TM	233	err = _nfs42_proc_copy(src, src_lock,
	234	dst, dst_lock,
	235	&args, &res);
ea8ea737	236	inode_unlock(file_inode(dst));
2e72448b	237
9d8cacbf TM	238	if (err >= 0)
9d8cacbf TM	239	break;
2e72448b AS	240	if (err == -ENOTSUPP) {
	241	err = -EOPNOTSUPP;
	242	break;
	243	}
	244
	245	err2 = nfs4_handle_exception(server, err, &src_exception);
	246	err = nfs4_handle_exception(server, err, &dst_exception);
	247	if (!err)
	248	err = err2;
	249	} while (src_exception.retry \|\| dst_exception.retry);
	250
	251	nfs_put_lock_context(dst_lock);
	252	out_put_src_lock:
	253	nfs_put_lock_context(src_lock);
	254	return err;
	255	}
	256
4bdf87eb CH	257	static loff_t _nfs42_proc_llseek(struct file *filep,
4bdf87eb CH	258	struct nfs_lock_context *lock, loff_t offset, int whence)
1c6dcbe5 AS	259	{
	260	struct inode *inode = file_inode(filep);
	261	struct nfs42_seek_args args = {
	262	.sa_fh = NFS_FH(inode),
	263	.sa_offset = offset,
	264	.sa_what = (whence == SEEK_HOLE) ?
	265	NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	266	};
	267	struct nfs42_seek_res res;
	268	struct rpc_message msg = {
	269	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
	270	.rpc_argp = &args,
	271	.rpc_resp = &res,
	272	};
	273	struct nfs_server *server = NFS_SERVER(inode);
	274	int status;
	275
878ffa9f	276	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
1c6dcbe5 AS	277	return -ENOTSUPP;
1c6dcbe5 AS	278
4bdf87eb CH	279	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
4bdf87eb CH	280	lock, FMODE_READ);
1c6dcbe5 AS	281	if (status)
	282	return status;
	283
e95fc4a0 TM	284	status = nfs_filemap_write_and_wait_range(inode->i_mapping,
	285	offset, LLONG_MAX);
	286	if (status)
	287	return status;
	288
1c6dcbe5 AS	289	status = nfs4_call_sync(server->client, server, &msg,
	290	&args.seq_args, &res.seq_res, 0);
	291	if (status == -ENOTSUPP)
	292	server->caps &= ~NFS_CAP_SEEK;
	293	if (status)
	294	return status;
	295
	296	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
	297	}
be3a5d23	298
bdcc2cd1 BF	299	loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
	300	{
	301	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	302	struct nfs4_exception exception = { };
4bdf87eb	303	struct nfs_lock_context *lock;
306a5549	304	loff_t err;
bdcc2cd1	305
4bdf87eb CH	306	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	307	if (IS_ERR(lock))
	308	return PTR_ERR(lock);
	309
	310	exception.inode = file_inode(filep);
	311	exception.state = lock->open_context->state;
	312
bdcc2cd1	313	do {
4bdf87eb	314	err = _nfs42_proc_llseek(filep, lock, offset, whence);
306a5549 BF	315	if (err >= 0)
306a5549 BF	316	break;
4bdf87eb CH	317	if (err == -ENOTSUPP) {
	318	err = -EOPNOTSUPP;
	319	break;
	320	}
bdcc2cd1 BF	321	err = nfs4_handle_exception(server, err, &exception);
	322	} while (exception.retry);
	323
4bdf87eb	324	nfs_put_lock_context(lock);
bdcc2cd1 BF	325	return err;
	326	}
	327
	328
1b4a4bd8 PT	329	static void
	330	nfs42_layoutstat_prepare(struct rpc_task task, void calldata)
	331	{
	332	struct nfs42_layoutstat_data *data = calldata;
9a0fe867 TM	333	struct inode *inode = data->inode;
	334	struct nfs_server *server = NFS_SERVER(inode);
	335	struct pnfs_layout_hdr *lo;
1b4a4bd8	336
9a0fe867 TM	337	spin_lock(&inode->i_lock);
	338	lo = NFS_I(inode)->layout;
	339	if (!pnfs_layout_is_valid(lo)) {
	340	spin_unlock(&inode->i_lock);
	341	rpc_exit(task, 0);
	342	return;
	343	}
	344	nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
	345	spin_unlock(&inode->i_lock);
6de7e12f AS	346	nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6de7e12f AS	347	&data->res.seq_res, task);
1b4a4bd8 PT	348	}
	349
	350	static void
	351	nfs42_layoutstat_done(struct rpc_task task, void calldata)
	352	{
	353	struct nfs42_layoutstat_data *data = calldata;
68d264cf PT	354	struct inode *inode = data->inode;
68d264cf PT	355	struct pnfs_layout_hdr *lo;
1b4a4bd8 PT	356
	357	if (!nfs4_sequence_done(task, &data->res.seq_res))
	358	return;
	359
6c5a0d89 TM	360	switch (task->tk_status) {
	361	case 0:
	362	break;
68d264cf	363	case -NFS4ERR_EXPIRED:
206b3bb5 TM	364	case -NFS4ERR_ADMIN_REVOKED:
206b3bb5 TM	365	case -NFS4ERR_DELEG_REVOKED:
68d264cf	366	case -NFS4ERR_STALE_STATEID:
68d264cf PT	367	case -NFS4ERR_BAD_STATEID:
	368	spin_lock(&inode->i_lock);
	369	lo = NFS_I(inode)->layout;
9a0fe867 TM	370	if (pnfs_layout_is_valid(lo) &&
9a0fe867 TM	371	nfs4_stateid_match(&data->args.stateid,
68d264cf PT	372	&lo->plh_stateid)) {
	373	LIST_HEAD(head);
	374
	375	/*
	376	* Mark the bad layout state as invalid, then retry
	377	* with the current stateid.
	378	*/
5f46be04	379	pnfs_mark_layout_stateid_invalid(lo, &head);
68d264cf PT	380	spin_unlock(&inode->i_lock);
	381	pnfs_free_lseg_list(&head);
	382	} else
	383	spin_unlock(&inode->i_lock);
	384	break;
9a0fe867 TM	385	case -NFS4ERR_OLD_STATEID:
	386	spin_lock(&inode->i_lock);
	387	lo = NFS_I(inode)->layout;
	388	if (pnfs_layout_is_valid(lo) &&
	389	nfs4_stateid_match_other(&data->args.stateid,
	390	&lo->plh_stateid)) {
	391	/* Do we need to delay before resending? */
	392	if (!nfs4_stateid_is_newer(&lo->plh_stateid,
	393	&data->args.stateid))
	394	rpc_delay(task, HZ);
	395	rpc_restart_call_prepare(task);
	396	}
	397	spin_unlock(&inode->i_lock);
	398	break;
6c5a0d89 TM	399	case -ENOTSUPP:
6c5a0d89 TM	400	case -EOPNOTSUPP:
68d264cf	401	NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
6c5a0d89	402	}
1b4a4bd8 PT	403	}
	404
	405	static void
	406	nfs42_layoutstat_release(void *calldata)
	407	{
	408	struct nfs42_layoutstat_data *data = calldata;
422c93c8 TM	409	struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
422c93c8 TM	410	int i;
8733408d	411
422c93c8 TM	412	for (i = 0; i < data->args.num_dev; i++) {
	413	if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
	414	devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
	415	}
1b4a4bd8 PT	416
1b4a4bd8 PT	417	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
1bfe3b25 PT	418	smp_mb__before_atomic();
	419	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	420	smp_mb__after_atomic();
1b4a4bd8 PT	421	nfs_iput_and_deactive(data->inode);
	422	kfree(data->args.devinfo);
	423	kfree(data);
	424	}
	425
be3a5d23	426	static const struct rpc_call_ops nfs42_layoutstat_ops = {
1b4a4bd8 PT	427	.rpc_call_prepare = nfs42_layoutstat_prepare,
	428	.rpc_call_done = nfs42_layoutstat_done,
	429	.rpc_release = nfs42_layoutstat_release,
be3a5d23 TM	430	};
	431
	432	int nfs42_proc_layoutstats_generic(struct nfs_server *server,
	433	struct nfs42_layoutstat_data *data)
	434	{
	435	struct rpc_message msg = {
	436	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
	437	.rpc_argp = &data->args,
	438	.rpc_resp = &data->res,
	439	};
	440	struct rpc_task_setup task_setup = {
	441	.rpc_client = server->client,
	442	.rpc_message = &msg,
	443	.callback_ops = &nfs42_layoutstat_ops,
	444	.callback_data = data,
	445	.flags = RPC_TASK_ASYNC,
	446	};
	447	struct rpc_task *task;
	448
1b4a4bd8 PT	449	data->inode = nfs_igrab_and_active(data->args.inode);
	450	if (!data->inode) {
	451	nfs42_layoutstat_release(data);
	452	return -EAGAIN;
	453	}
be3a5d23 TM	454	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	455	task = rpc_run_task(&task_setup);
	456	if (IS_ERR(task))
	457	return PTR_ERR(task);
3f807e5a	458	rpc_put_task(task);
be3a5d23 TM	459	return 0;
be3a5d23 TM	460	}
e5341f3a PT	461
e5341f3a PT	462	static int _nfs42_proc_clone(struct rpc_message msg, struct file src_f,
4bdf87eb CH	463	struct file dst_f, struct nfs_lock_context src_lock,
	464	struct nfs_lock_context *dst_lock, loff_t src_offset,
	465	loff_t dst_offset, loff_t count)
e5341f3a PT	466	{
	467	struct inode *src_inode = file_inode(src_f);
	468	struct inode *dst_inode = file_inode(dst_f);
	469	struct nfs_server *server = NFS_SERVER(dst_inode);
	470	struct nfs42_clone_args args = {
	471	.src_fh = NFS_FH(src_inode),
	472	.dst_fh = NFS_FH(dst_inode),
	473	.src_offset = src_offset,
	474	.dst_offset = dst_offset,
9494b2ce	475	.count = count,
e5341f3a PT	476	.dst_bitmask = server->cache_consistency_bitmask,
	477	};
	478	struct nfs42_clone_res res = {
	479	.server = server,
	480	};
	481	int status;
	482
	483	msg->rpc_argp = &args;
	484	msg->rpc_resp = &res;
	485
4bdf87eb CH	486	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
4bdf87eb CH	487	src_lock, FMODE_READ);
e5341f3a PT	488	if (status)
	489	return status;
	490
4bdf87eb CH	491	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
4bdf87eb CH	492	dst_lock, FMODE_WRITE);
e5341f3a PT	493	if (status)
	494	return status;
	495
	496	res.dst_fattr = nfs_alloc_fattr();
	497	if (!res.dst_fattr)
	498	return -ENOMEM;
	499
	500	status = nfs4_call_sync(server->client, server, msg,
	501	&args.seq_args, &res.seq_res, 0);
	502	if (status == 0)
	503	status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
	504
	505	kfree(res.dst_fattr);
	506	return status;
	507	}
	508
	509	int nfs42_proc_clone(struct file src_f, struct file dst_f,
	510	loff_t src_offset, loff_t dst_offset, loff_t count)
	511	{
	512	struct rpc_message msg = {
	513	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	514	};
	515	struct inode *inode = file_inode(src_f);
	516	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
4bdf87eb CH	517	struct nfs_lock_context *src_lock;
	518	struct nfs_lock_context *dst_lock;
	519	struct nfs4_exception src_exception = { };
	520	struct nfs4_exception dst_exception = { };
	521	int err, err2;
e5341f3a PT	522
	523	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
	524	return -EOPNOTSUPP;
	525
4bdf87eb CH	526	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	527	if (IS_ERR(src_lock))
	528	return PTR_ERR(src_lock);
	529
	530	src_exception.inode = file_inode(src_f);
	531	src_exception.state = src_lock->open_context->state;
	532
	533	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	534	if (IS_ERR(dst_lock)) {
	535	err = PTR_ERR(dst_lock);
	536	goto out_put_src_lock;
	537	}
	538
	539	dst_exception.inode = file_inode(dst_f);
	540	dst_exception.state = dst_lock->open_context->state;
	541
e5341f3a	542	do {
4bdf87eb CH	543	err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
4bdf87eb CH	544	src_offset, dst_offset, count);
e5341f3a PT	545	if (err == -ENOTSUPP \|\| err == -EOPNOTSUPP) {
e5341f3a PT	546	NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
4bdf87eb CH	547	err = -EOPNOTSUPP;
4bdf87eb CH	548	break;
e5341f3a	549	}
e5341f3a	550
4bdf87eb CH	551	err2 = nfs4_handle_exception(server, err, &src_exception);
	552	err = nfs4_handle_exception(server, err, &dst_exception);
	553	if (!err)
	554	err = err2;
	555	} while (src_exception.retry \|\| dst_exception.retry);
e5341f3a	556
4bdf87eb CH	557	nfs_put_lock_context(dst_lock);
	558	out_put_src_lock:
	559	nfs_put_lock_context(src_lock);
	560	return err;
e5341f3a	561	}