Commit c975c209 authored by Olga Kornievskaia's avatar Olga Kornievskaia Committed by Anna Schumaker
Browse files

NFS send OFFLOAD_CANCEL when COPY killed 



When COPY is killed by the user send OFFLOAD_CANCEL to server
processing the copy.

Signed-off-by: default avatarOlga Kornievskaia <kolga@netapp.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 0f913a57

fs/nfs/nfs42proc.c

+90 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "internal.h"



#define NFSDBG_FACILITY NFSDBG_PROC

static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);



static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,

		struct nfs_lock_context *lock, loff_t offset, loff_t len)
@@ -166,10 +167,15 @@ static int handle_async_copy(struct nfs42_copy_res *res, 
	list_add_tail(&copy->copies, &server->ss_copies);

	spin_unlock(&server->nfs_client->cl_lock);



	wait_for_completion_interruptible(&copy->completion);

	status = wait_for_completion_interruptible(&copy->completion);

	spin_lock(&server->nfs_client->cl_lock);

	list_del_init(&copy->copies);

	spin_unlock(&server->nfs_client->cl_lock);

	if (status == -ERESTARTSYS) {

		nfs42_do_offload_cancel_async(dst, &copy->stateid);

		kfree(copy);

		return status;

	}

out:

	res->write_res.count = copy->count;

	memcpy(&res->write_res.verifier, &copy->verf, sizeof(copy->verf));
@@ -327,6 +333,89 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, 
	return err;

}



struct nfs42_offloadcancel_data {

	struct nfs_server *seq_server;

	struct nfs42_offload_status_args args;

	struct nfs42_offload_status_res res;

};



static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)

{

	struct nfs42_offloadcancel_data *data = calldata;



	nfs4_setup_sequence(data->seq_server->nfs_client,

				&data->args.osa_seq_args,

				&data->res.osr_seq_res, task);

}



static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)

{

	struct nfs42_offloadcancel_data *data = calldata;



	nfs41_sequence_done(task, &data->res.osr_seq_res);

	if (task->tk_status &&

		nfs4_async_handle_error(task, data->seq_server, NULL,

			NULL) == -EAGAIN)

		rpc_restart_call_prepare(task);

}



static void nfs42_free_offloadcancel_data(void *data)

{

	kfree(data);

}



static const struct rpc_call_ops nfs42_offload_cancel_ops = {

	.rpc_call_prepare = nfs42_offload_cancel_prepare,

	.rpc_call_done = nfs42_offload_cancel_done,

	.rpc_release = nfs42_free_offloadcancel_data,

};



static int nfs42_do_offload_cancel_async(struct file *dst,

					 nfs4_stateid *stateid)

{

	struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));

	struct nfs42_offloadcancel_data *data = NULL;

	struct nfs_open_context *ctx = nfs_file_open_context(dst);

	struct rpc_task *task;

	struct rpc_message msg = {

		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],

		.rpc_cred = ctx->cred,

	};

	struct rpc_task_setup task_setup_data = {

		.rpc_client = dst_server->client,

		.rpc_message = &msg,

		.callback_ops = &nfs42_offload_cancel_ops,

		.workqueue = nfsiod_workqueue,

		.flags = RPC_TASK_ASYNC,

	};

	int status;



	if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))

		return -EOPNOTSUPP;



	data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);

	if (data == NULL)

		return -ENOMEM;



	data->seq_server = dst_server;

	data->args.osa_src_fh = NFS_FH(file_inode(dst));

	memcpy(&data->args.osa_stateid, stateid,

		sizeof(data->args.osa_stateid));

	msg.rpc_argp = &data->args;

	msg.rpc_resp = &data->res;

	task_setup_data.callback_data = data;

	nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,

			   1, 0);

	task = rpc_run_task(&task_setup_data);

	if (IS_ERR(task))

		return PTR_ERR(task);

	status = rpc_wait_for_completion_task(task);

	if (status == -ENOTSUPP)

		dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;

	rpc_put_task(task);

	return status;

}



static loff_t _nfs42_proc_llseek(struct file *filep,

		struct nfs_lock_context *lock, loff_t offset, int whence)

{