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e4648aa4f9
Mark the destination state to indicate a server-side copy is happening. On detecting a reboot and recovering open state check if any state is engaged in a server-side copy, if so, find the copy and mark it and then signal the waiting thread. Upon wakeup, if copy was marked then propage EAGAIN to the nfsd_copy_file_range and restart the copy from scratch. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
774 lines
20 KiB
C
774 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
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*/
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#include <linux/fs.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/nfs.h>
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#include <linux/nfs3.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_xdr.h>
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#include <linux/nfs_fs.h>
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#include "nfs4_fs.h"
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#include "nfs42.h"
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#include "iostat.h"
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#include "pnfs.h"
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#include "nfs4session.h"
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#include "internal.h"
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#define NFSDBG_FACILITY NFSDBG_PROC
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static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
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static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
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struct nfs_lock_context *lock, loff_t offset, loff_t len)
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{
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struct inode *inode = file_inode(filep);
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struct nfs_server *server = NFS_SERVER(inode);
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struct nfs42_falloc_args args = {
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.falloc_fh = NFS_FH(inode),
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.falloc_offset = offset,
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.falloc_length = len,
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.falloc_bitmask = server->cache_consistency_bitmask,
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};
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struct nfs42_falloc_res res = {
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.falloc_server = server,
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};
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int status;
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msg->rpc_argp = &args;
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msg->rpc_resp = &res;
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status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
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lock, FMODE_WRITE);
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if (status)
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return status;
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res.falloc_fattr = nfs_alloc_fattr();
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if (!res.falloc_fattr)
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return -ENOMEM;
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status = nfs4_call_sync(server->client, server, msg,
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&args.seq_args, &res.seq_res, 0);
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if (status == 0)
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status = nfs_post_op_update_inode(inode, res.falloc_fattr);
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kfree(res.falloc_fattr);
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return status;
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}
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static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
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loff_t offset, loff_t len)
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{
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struct nfs_server *server = NFS_SERVER(file_inode(filep));
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struct nfs4_exception exception = { };
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struct nfs_lock_context *lock;
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int err;
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lock = nfs_get_lock_context(nfs_file_open_context(filep));
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if (IS_ERR(lock))
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return PTR_ERR(lock);
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exception.inode = file_inode(filep);
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exception.state = lock->open_context->state;
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do {
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err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
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if (err == -ENOTSUPP) {
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err = -EOPNOTSUPP;
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break;
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}
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err = nfs4_handle_exception(server, err, &exception);
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} while (exception.retry);
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nfs_put_lock_context(lock);
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return err;
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}
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int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
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};
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struct inode *inode = file_inode(filep);
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int err;
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if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
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return -EOPNOTSUPP;
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inode_lock(inode);
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err = nfs42_proc_fallocate(&msg, filep, offset, len);
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if (err == -EOPNOTSUPP)
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NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
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inode_unlock(inode);
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return err;
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}
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int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
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};
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struct inode *inode = file_inode(filep);
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int err;
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if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
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return -EOPNOTSUPP;
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inode_lock(inode);
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err = nfs_sync_inode(inode);
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if (err)
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goto out_unlock;
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err = nfs42_proc_fallocate(&msg, filep, offset, len);
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if (err == 0)
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truncate_pagecache_range(inode, offset, (offset + len) -1);
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if (err == -EOPNOTSUPP)
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NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
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out_unlock:
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inode_unlock(inode);
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return err;
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}
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static int handle_async_copy(struct nfs42_copy_res *res,
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struct nfs_server *server,
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struct file *src,
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struct file *dst,
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nfs4_stateid *src_stateid)
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{
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struct nfs4_copy_state *copy;
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int status = NFS4_OK;
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bool found_pending = false;
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struct nfs_open_context *ctx = nfs_file_open_context(dst);
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spin_lock(&server->nfs_client->cl_lock);
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list_for_each_entry(copy, &server->nfs_client->pending_cb_stateids,
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copies) {
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if (memcmp(&res->write_res.stateid, ©->stateid,
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NFS4_STATEID_SIZE))
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continue;
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found_pending = true;
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list_del(©->copies);
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break;
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}
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if (found_pending) {
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spin_unlock(&server->nfs_client->cl_lock);
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goto out;
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}
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copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
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if (!copy) {
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spin_unlock(&server->nfs_client->cl_lock);
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return -ENOMEM;
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}
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memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
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init_completion(©->completion);
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copy->parent_state = ctx->state;
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list_add_tail(©->copies, &server->ss_copies);
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spin_unlock(&server->nfs_client->cl_lock);
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status = wait_for_completion_interruptible(©->completion);
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spin_lock(&server->nfs_client->cl_lock);
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list_del_init(©->copies);
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spin_unlock(&server->nfs_client->cl_lock);
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if (status == -ERESTARTSYS) {
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goto out_cancel;
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} else if (copy->flags) {
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status = -EAGAIN;
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goto out_cancel;
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}
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out:
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res->write_res.count = copy->count;
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memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
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status = -copy->error;
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kfree(copy);
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return status;
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out_cancel:
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nfs42_do_offload_cancel_async(dst, ©->stateid);
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kfree(copy);
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return status;
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}
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static int process_copy_commit(struct file *dst, loff_t pos_dst,
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struct nfs42_copy_res *res)
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{
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struct nfs_commitres cres;
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int status = -ENOMEM;
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cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
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if (!cres.verf)
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goto out;
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status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
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if (status)
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goto out_free;
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if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
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&cres.verf->verifier)) {
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dprintk("commit verf differs from copy verf\n");
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status = -EAGAIN;
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}
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out_free:
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kfree(cres.verf);
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out:
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return status;
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}
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static ssize_t _nfs42_proc_copy(struct file *src,
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struct nfs_lock_context *src_lock,
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struct file *dst,
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struct nfs_lock_context *dst_lock,
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struct nfs42_copy_args *args,
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struct nfs42_copy_res *res)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
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.rpc_argp = args,
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.rpc_resp = res,
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};
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struct inode *dst_inode = file_inode(dst);
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struct nfs_server *server = NFS_SERVER(dst_inode);
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loff_t pos_src = args->src_pos;
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loff_t pos_dst = args->dst_pos;
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size_t count = args->count;
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ssize_t status;
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status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
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src_lock, FMODE_READ);
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if (status)
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return status;
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status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
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pos_src, pos_src + (loff_t)count - 1);
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if (status)
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return status;
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status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
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dst_lock, FMODE_WRITE);
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if (status)
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return status;
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status = nfs_sync_inode(dst_inode);
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if (status)
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return status;
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res->commit_res.verf = NULL;
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if (args->sync) {
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res->commit_res.verf =
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kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
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if (!res->commit_res.verf)
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return -ENOMEM;
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}
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set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
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&dst_lock->open_context->state->flags);
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status = nfs4_call_sync(server->client, server, &msg,
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&args->seq_args, &res->seq_res, 0);
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if (status == -ENOTSUPP)
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server->caps &= ~NFS_CAP_COPY;
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if (status)
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goto out;
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if (args->sync &&
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nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
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&res->commit_res.verf->verifier)) {
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status = -EAGAIN;
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goto out;
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}
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if (!res->synchronous) {
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status = handle_async_copy(res, server, src, dst,
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&args->src_stateid);
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if (status)
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return status;
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}
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if ((!res->synchronous || !args->sync) &&
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res->write_res.verifier.committed != NFS_FILE_SYNC) {
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status = process_copy_commit(dst, pos_dst, res);
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if (status)
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return status;
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}
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truncate_pagecache_range(dst_inode, pos_dst,
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pos_dst + res->write_res.count);
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status = res->write_res.count;
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out:
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if (args->sync)
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kfree(res->commit_res.verf);
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return status;
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}
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ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
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struct file *dst, loff_t pos_dst,
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size_t count)
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{
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struct nfs_server *server = NFS_SERVER(file_inode(dst));
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struct nfs_lock_context *src_lock;
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struct nfs_lock_context *dst_lock;
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struct nfs42_copy_args args = {
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.src_fh = NFS_FH(file_inode(src)),
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.src_pos = pos_src,
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.dst_fh = NFS_FH(file_inode(dst)),
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.dst_pos = pos_dst,
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.count = count,
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.sync = false,
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};
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struct nfs42_copy_res res;
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struct nfs4_exception src_exception = {
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.inode = file_inode(src),
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.stateid = &args.src_stateid,
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};
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struct nfs4_exception dst_exception = {
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.inode = file_inode(dst),
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.stateid = &args.dst_stateid,
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};
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ssize_t err, err2;
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if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
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return -EOPNOTSUPP;
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src_lock = nfs_get_lock_context(nfs_file_open_context(src));
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if (IS_ERR(src_lock))
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return PTR_ERR(src_lock);
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src_exception.state = src_lock->open_context->state;
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dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
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if (IS_ERR(dst_lock)) {
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err = PTR_ERR(dst_lock);
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goto out_put_src_lock;
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}
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dst_exception.state = dst_lock->open_context->state;
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do {
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inode_lock(file_inode(dst));
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err = _nfs42_proc_copy(src, src_lock,
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dst, dst_lock,
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&args, &res);
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inode_unlock(file_inode(dst));
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if (err >= 0)
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break;
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if (err == -ENOTSUPP) {
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err = -EOPNOTSUPP;
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break;
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} else if (err == -EAGAIN) {
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dst_exception.retry = 1;
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continue;
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} else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
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args.sync = true;
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dst_exception.retry = 1;
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continue;
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}
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err2 = nfs4_handle_exception(server, err, &src_exception);
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err = nfs4_handle_exception(server, err, &dst_exception);
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if (!err)
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err = err2;
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} while (src_exception.retry || dst_exception.retry);
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nfs_put_lock_context(dst_lock);
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out_put_src_lock:
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nfs_put_lock_context(src_lock);
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return err;
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}
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struct nfs42_offloadcancel_data {
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struct nfs_server *seq_server;
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struct nfs42_offload_status_args args;
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struct nfs42_offload_status_res res;
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};
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static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
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{
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struct nfs42_offloadcancel_data *data = calldata;
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nfs4_setup_sequence(data->seq_server->nfs_client,
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&data->args.osa_seq_args,
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&data->res.osr_seq_res, task);
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}
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static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
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{
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struct nfs42_offloadcancel_data *data = calldata;
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nfs41_sequence_done(task, &data->res.osr_seq_res);
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if (task->tk_status &&
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nfs4_async_handle_error(task, data->seq_server, NULL,
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NULL) == -EAGAIN)
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rpc_restart_call_prepare(task);
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}
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static void nfs42_free_offloadcancel_data(void *data)
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{
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kfree(data);
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}
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static const struct rpc_call_ops nfs42_offload_cancel_ops = {
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.rpc_call_prepare = nfs42_offload_cancel_prepare,
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.rpc_call_done = nfs42_offload_cancel_done,
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.rpc_release = nfs42_free_offloadcancel_data,
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};
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static int nfs42_do_offload_cancel_async(struct file *dst,
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nfs4_stateid *stateid)
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{
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struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
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struct nfs42_offloadcancel_data *data = NULL;
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struct nfs_open_context *ctx = nfs_file_open_context(dst);
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struct rpc_task *task;
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
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.rpc_cred = ctx->cred,
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};
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struct rpc_task_setup task_setup_data = {
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.rpc_client = dst_server->client,
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.rpc_message = &msg,
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.callback_ops = &nfs42_offload_cancel_ops,
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.workqueue = nfsiod_workqueue,
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.flags = RPC_TASK_ASYNC,
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};
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int status;
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if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
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return -EOPNOTSUPP;
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data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
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if (data == NULL)
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return -ENOMEM;
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data->seq_server = dst_server;
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data->args.osa_src_fh = NFS_FH(file_inode(dst));
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memcpy(&data->args.osa_stateid, stateid,
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sizeof(data->args.osa_stateid));
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msg.rpc_argp = &data->args;
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msg.rpc_resp = &data->res;
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task_setup_data.callback_data = data;
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nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
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1, 0);
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task = rpc_run_task(&task_setup_data);
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if (IS_ERR(task))
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return PTR_ERR(task);
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status = rpc_wait_for_completion_task(task);
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if (status == -ENOTSUPP)
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dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
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rpc_put_task(task);
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return status;
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}
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static loff_t _nfs42_proc_llseek(struct file *filep,
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struct nfs_lock_context *lock, loff_t offset, int whence)
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{
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struct inode *inode = file_inode(filep);
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struct nfs42_seek_args args = {
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.sa_fh = NFS_FH(inode),
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.sa_offset = offset,
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.sa_what = (whence == SEEK_HOLE) ?
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NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
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};
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struct nfs42_seek_res res;
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
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.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_BADHANDLE:
|
|
case -ESTALE:
|
|
pnfs_destroy_layout(NFS_I(inode));
|
|
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, 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;
|
|
}
|