Return-Path: Received: from mx144.netapp.com ([216.240.21.25]:29289 "EHLO mx144.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932704AbeGITNi (ORCPT ); Mon, 9 Jul 2018 15:13:38 -0400 From: Olga Kornievskaia To: , CC: Subject: [PATCH v9 08/13] NFS send OFFLOAD_CANCEL when COPY killed Date: Mon, 9 Jul 2018 15:13:34 -0400 Message-ID: <20180709191339.44740-9-kolga@netapp.com> In-Reply-To: <20180709191339.44740-1-kolga@netapp.com> References: <20180709191339.44740-1-kolga@netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: When COPY is killed by the user send OFFLOAD_CANCEL to server processing the copy. Signed-off-by: Olga Kornievskaia --- fs/nfs/nfs42proc.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 90 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index c7d31f7..aeb9837 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -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(©->copies, &server->ss_copies); spin_unlock(&server->nfs_client->cl_lock); - wait_for_completion_interruptible(©->completion); + status = wait_for_completion_interruptible(©->completion); spin_lock(&server->nfs_client->cl_lock); list_del_init(©->copies); spin_unlock(&server->nfs_client->cl_lock); + if (status == -ERESTARTSYS) { + nfs42_do_offload_cancel_async(dst, ©->stateid); + kfree(copy); + return status; + } out: res->write_res.count = copy->count; memcpy(&res->write_res.verifier, ©->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) { -- 1.8.3.1