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![Tigran Mkrtchyan](/assets/img/avatar_default.png)
The NFSv4.2 server even if supports intra-SSC might prefer that for a particular file a classic copy is performed. As returning ENOTSUPP will clear the SSC capability of the server by the client, server might return NFS4ERR_OFFLOAD_DENIED (well, spec talks about remote servers there). Update nfs42_proc_copy to handle NFS4ERR_OFFLOAD_DENIED as ENOTSUPP, but without clearing NFS_CAP_COPY bit. Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1443 lines
37 KiB
C
1443 lines
37 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/addr.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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#include "delegation.h"
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#include "nfs4trace.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 void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr *naddr)
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{
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struct nfs_client *clp = (NFS_SERVER(file_inode(filep)))->nfs_client;
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unsigned short port = 2049;
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rcu_read_lock();
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naddr->netid_len = scnprintf(naddr->netid,
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sizeof(naddr->netid), "%s",
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rpc_peeraddr2str(clp->cl_rpcclient,
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RPC_DISPLAY_NETID));
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naddr->addr_len = scnprintf(naddr->addr,
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sizeof(naddr->addr),
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"%s.%u.%u",
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rpc_peeraddr2str(clp->cl_rpcclient,
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RPC_DISPLAY_ADDR),
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port >> 8, port & 255);
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rcu_read_unlock();
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}
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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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u32 bitmask[NFS_BITMASK_SZ];
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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 = 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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if (status == -EAGAIN)
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status = -NFS4ERR_BAD_STATEID;
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return status;
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}
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nfs4_bitmask_set(bitmask, server->cache_consistency_bitmask, inode,
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NFS_INO_INVALID_BLOCKS);
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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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if (nfs_should_remove_suid(inode)) {
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spin_lock(&inode->i_lock);
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
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spin_unlock(&inode->i_lock);
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}
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status = nfs_post_op_update_inode_force_wcc(inode,
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res.falloc_fattr);
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}
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if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
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trace_nfs4_fallocate(inode, &args, status);
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else
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trace_nfs4_deallocate(inode, &args, status);
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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 inode *inode = file_inode(filep);
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struct nfs_server *server = NFS_SERVER(inode);
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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 = inode;
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exception.state = lock->open_context->state;
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err = nfs_sync_inode(inode);
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if (err)
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goto out;
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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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out:
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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 = 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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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 *dst_server,
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struct nfs_server *src_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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bool *restart)
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{
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struct nfs4_copy_state *copy, *tmp_copy = NULL, *iter;
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int status = NFS4_OK;
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struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
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struct nfs_open_context *src_ctx = nfs_file_open_context(src);
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copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL);
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if (!copy)
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return -ENOMEM;
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spin_lock(&dst_server->nfs_client->cl_lock);
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list_for_each_entry(iter,
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&dst_server->nfs_client->pending_cb_stateids,
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copies) {
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if (memcmp(&res->write_res.stateid, &iter->stateid,
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NFS4_STATEID_SIZE))
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continue;
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tmp_copy = iter;
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list_del(&iter->copies);
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break;
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}
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if (tmp_copy) {
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spin_unlock(&dst_server->nfs_client->cl_lock);
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kfree(copy);
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copy = tmp_copy;
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goto out;
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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_dst_state = dst_ctx->state;
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copy->parent_src_state = src_ctx->state;
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list_add_tail(©->copies, &dst_server->ss_copies);
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spin_unlock(&dst_server->nfs_client->cl_lock);
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if (dst_server != src_server) {
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spin_lock(&src_server->nfs_client->cl_lock);
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list_add_tail(©->src_copies, &src_server->ss_copies);
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spin_unlock(&src_server->nfs_client->cl_lock);
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}
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status = wait_for_completion_interruptible(©->completion);
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spin_lock(&dst_server->nfs_client->cl_lock);
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list_del_init(©->copies);
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spin_unlock(&dst_server->nfs_client->cl_lock);
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if (dst_server != src_server) {
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spin_lock(&src_server->nfs_client->cl_lock);
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list_del_init(©->src_copies);
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spin_unlock(&src_server->nfs_client->cl_lock);
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}
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if (status == -ERESTARTSYS) {
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goto out_cancel;
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} else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
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status = -EAGAIN;
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*restart = true;
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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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out_free:
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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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if (!nfs42_files_from_same_server(src, dst))
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nfs42_do_offload_cancel_async(src, src_stateid);
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goto out_free;
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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_KERNEL);
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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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/**
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* nfs42_copy_dest_done - perform inode cache updates after clone/copy offload
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* @inode: pointer to destination inode
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* @pos: destination offset
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* @len: copy length
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*
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* Punch a hole in the inode page cache, so that the NFS client will
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* know to retrieve new data.
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* Update the file size if necessary, and then mark the inode as having
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* invalid cached values for change attribute, ctime, mtime and space used.
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*/
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static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len)
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{
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loff_t newsize = pos + len;
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loff_t end = newsize - 1;
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WARN_ON_ONCE(invalidate_inode_pages2_range(inode->i_mapping,
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pos >> PAGE_SHIFT, end >> PAGE_SHIFT));
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spin_lock(&inode->i_lock);
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if (newsize > i_size_read(inode))
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i_size_write(inode, newsize);
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
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NFS_INO_INVALID_CTIME |
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NFS_INO_INVALID_MTIME |
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NFS_INO_INVALID_BLOCKS);
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spin_unlock(&inode->i_lock);
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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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struct nl4_server *nss,
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nfs4_stateid *cnr_stateid,
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bool *restart)
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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 inode *src_inode = file_inode(src);
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struct nfs_server *dst_server = NFS_SERVER(dst_inode);
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struct nfs_server *src_server = NFS_SERVER(src_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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if (nss) {
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args->cp_src = nss;
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nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
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} else {
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status = nfs4_set_rw_stateid(&args->src_stateid,
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src_lock->open_context, src_lock, FMODE_READ);
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if (status) {
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if (status == -EAGAIN)
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status = -NFS4ERR_BAD_STATEID;
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return status;
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}
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}
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status = nfs_filemap_write_and_wait_range(src->f_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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if (status == -EAGAIN)
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status = -NFS4ERR_BAD_STATEID;
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return status;
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}
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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_KERNEL);
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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_SRC_SSC_COPY_STATE,
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&src_lock->open_context->state->flags);
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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(dst_server->client, dst_server, &msg,
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&args->seq_args, &res->seq_res, 0);
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trace_nfs4_copy(src_inode, dst_inode, args, res, nss, status);
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if (status == -ENOTSUPP)
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dst_server->caps &= ~NFS_CAP_COPY;
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if (status)
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goto out;
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|
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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, dst_server, src_server, src,
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dst, &args->src_stateid, restart);
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if (status)
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goto out;
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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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goto out;
|
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}
|
|
|
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nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
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nfs_invalidate_atime(src_inode);
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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, size_t count,
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struct nl4_server *nss,
|
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nfs4_stateid *cnr_stateid, bool sync)
|
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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)),
|
|
.dst_pos = pos_dst,
|
|
.count = count,
|
|
.sync = sync,
|
|
};
|
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struct nfs42_copy_res res;
|
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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,
|
|
};
|
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ssize_t err, err2;
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|
bool restart = false;
|
|
|
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src_lock = nfs_get_lock_context(nfs_file_open_context(src));
|
|
if (IS_ERR(src_lock))
|
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return PTR_ERR(src_lock);
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|
|
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src_exception.state = src_lock->open_context->state;
|
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|
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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 {
|
|
inode_lock(file_inode(dst));
|
|
err = _nfs42_proc_copy(src, src_lock,
|
|
dst, dst_lock,
|
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&args, &res,
|
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nss, cnr_stateid, &restart);
|
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inode_unlock(file_inode(dst));
|
|
|
|
if (err >= 0)
|
|
break;
|
|
if ((err == -ENOTSUPP ||
|
|
err == -NFS4ERR_OFFLOAD_DENIED) &&
|
|
nfs42_files_from_same_server(src, dst)) {
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
} else if (err == -EAGAIN) {
|
|
if (!restart) {
|
|
dst_exception.retry = 1;
|
|
continue;
|
|
}
|
|
break;
|
|
} else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
|
|
args.sync = true;
|
|
dst_exception.retry = 1;
|
|
continue;
|
|
} else if ((err == -ESTALE ||
|
|
err == -NFS4ERR_OFFLOAD_DENIED ||
|
|
err == -ENOTSUPP) &&
|
|
!nfs42_files_from_same_server(src, dst)) {
|
|
nfs42_do_offload_cancel_async(src, &args.src_stateid);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
trace_nfs4_offload_cancel(&data->args, task->tk_status);
|
|
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_KERNEL);
|
|
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 int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
|
|
struct nfs42_copy_notify_args *args,
|
|
struct nfs42_copy_notify_res *res)
|
|
{
|
|
struct nfs_server *src_server = NFS_SERVER(file_inode(src));
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
|
|
.rpc_argp = args,
|
|
.rpc_resp = res,
|
|
};
|
|
int status;
|
|
struct nfs_open_context *ctx;
|
|
struct nfs_lock_context *l_ctx;
|
|
|
|
ctx = get_nfs_open_context(nfs_file_open_context(src));
|
|
l_ctx = nfs_get_lock_context(ctx);
|
|
if (IS_ERR(l_ctx)) {
|
|
status = PTR_ERR(l_ctx);
|
|
goto out;
|
|
}
|
|
|
|
status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
|
|
FMODE_READ);
|
|
nfs_put_lock_context(l_ctx);
|
|
if (status) {
|
|
if (status == -EAGAIN)
|
|
status = -NFS4ERR_BAD_STATEID;
|
|
goto out;
|
|
}
|
|
|
|
status = nfs4_call_sync(src_server->client, src_server, &msg,
|
|
&args->cna_seq_args, &res->cnr_seq_res, 0);
|
|
trace_nfs4_copy_notify(file_inode(src), args, res, status);
|
|
if (status == -ENOTSUPP)
|
|
src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
|
|
|
|
out:
|
|
put_nfs_open_context(nfs_file_open_context(src));
|
|
return status;
|
|
}
|
|
|
|
int nfs42_proc_copy_notify(struct file *src, struct file *dst,
|
|
struct nfs42_copy_notify_res *res)
|
|
{
|
|
struct nfs_server *src_server = NFS_SERVER(file_inode(src));
|
|
struct nfs42_copy_notify_args *args;
|
|
struct nfs4_exception exception = {
|
|
.inode = file_inode(src),
|
|
};
|
|
int status;
|
|
|
|
if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
|
|
return -EOPNOTSUPP;
|
|
|
|
args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_KERNEL);
|
|
if (args == NULL)
|
|
return -ENOMEM;
|
|
|
|
args->cna_src_fh = NFS_FH(file_inode(src)),
|
|
args->cna_dst.nl4_type = NL4_NETADDR;
|
|
nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
|
|
exception.stateid = &args->cna_src_stateid;
|
|
|
|
do {
|
|
status = _nfs42_proc_copy_notify(src, dst, args, res);
|
|
if (status == -ENOTSUPP) {
|
|
status = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
status = nfs4_handle_exception(src_server, status, &exception);
|
|
} while (exception.retry);
|
|
|
|
out:
|
|
kfree(args);
|
|
return status;
|
|
}
|
|
|
|
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) {
|
|
if (status == -EAGAIN)
|
|
status = -NFS4ERR_BAD_STATEID;
|
|
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);
|
|
trace_nfs4_llseek(inode, &args, &res, status);
|
|
if (status == -ENOTSUPP)
|
|
server->caps &= ~NFS_CAP_SEEK;
|
|
if (status)
|
|
return status;
|
|
|
|
if (whence == SEEK_DATA && res.sr_eof)
|
|
return -NFS4ERR_NXIO;
|
|
else
|
|
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:
|
|
return;
|
|
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;
|
|
}
|
|
|
|
trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
|
|
}
|
|
|
|
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 struct nfs42_layouterror_data *
|
|
nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
|
|
{
|
|
struct nfs42_layouterror_data *data;
|
|
struct inode *inode = lseg->pls_layout->plh_inode;
|
|
|
|
data = kzalloc(sizeof(*data), gfp_flags);
|
|
if (data) {
|
|
data->args.inode = data->inode = nfs_igrab_and_active(inode);
|
|
if (data->inode) {
|
|
data->lseg = pnfs_get_lseg(lseg);
|
|
if (data->lseg)
|
|
return data;
|
|
nfs_iput_and_deactive(data->inode);
|
|
}
|
|
kfree(data);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
|
|
{
|
|
pnfs_put_lseg(data->lseg);
|
|
nfs_iput_and_deactive(data->inode);
|
|
kfree(data);
|
|
}
|
|
|
|
static void
|
|
nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs42_layouterror_data *data = calldata;
|
|
struct inode *inode = data->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
|
|
unsigned i;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (!pnfs_layout_is_valid(lo)) {
|
|
spin_unlock(&inode->i_lock);
|
|
rpc_exit(task, 0);
|
|
return;
|
|
}
|
|
for (i = 0; i < data->args.num_errors; i++)
|
|
nfs4_stateid_copy(&data->args.errors[i].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_layouterror_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs42_layouterror_data *data = calldata;
|
|
struct inode *inode = data->inode;
|
|
struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
|
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return;
|
|
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
return;
|
|
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);
|
|
if (pnfs_layout_is_valid(lo) &&
|
|
nfs4_stateid_match(&data->args.errors[0].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);
|
|
if (pnfs_layout_is_valid(lo) &&
|
|
nfs4_stateid_match_other(&data->args.errors[0].stateid,
|
|
&lo->plh_stateid)) {
|
|
/* Do we need to delay before resending? */
|
|
if (!nfs4_stateid_is_newer(&lo->plh_stateid,
|
|
&data->args.errors[0].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_LAYOUTERROR;
|
|
}
|
|
|
|
trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
|
|
task->tk_status);
|
|
}
|
|
|
|
static void
|
|
nfs42_layouterror_release(void *calldata)
|
|
{
|
|
struct nfs42_layouterror_data *data = calldata;
|
|
|
|
nfs42_free_layouterror_data(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs42_layouterror_ops = {
|
|
.rpc_call_prepare = nfs42_layouterror_prepare,
|
|
.rpc_call_done = nfs42_layouterror_done,
|
|
.rpc_release = nfs42_layouterror_release,
|
|
};
|
|
|
|
int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
|
|
const struct nfs42_layout_error *errors, size_t n)
|
|
{
|
|
struct inode *inode = lseg->pls_layout->plh_inode;
|
|
struct nfs42_layouterror_data *data;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
|
|
};
|
|
struct rpc_task_setup task_setup = {
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs42_layouterror_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
unsigned int i;
|
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
|
|
return -EOPNOTSUPP;
|
|
if (n > NFS42_LAYOUTERROR_MAX)
|
|
return -EINVAL;
|
|
data = nfs42_alloc_layouterror_data(lseg, nfs_io_gfp_mask());
|
|
if (!data)
|
|
return -ENOMEM;
|
|
for (i = 0; i < n; i++) {
|
|
data->args.errors[i] = errors[i];
|
|
data->args.num_errors++;
|
|
data->res.num_errors++;
|
|
}
|
|
msg.rpc_argp = &data->args;
|
|
msg.rpc_resp = &data->res;
|
|
task_setup.callback_data = data;
|
|
task_setup.rpc_client = NFS_SERVER(inode)->client;
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
|
|
|
|
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);
|
|
__u32 dst_bitmask[NFS_BITMASK_SZ];
|
|
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 = dst_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) {
|
|
if (status == -EAGAIN)
|
|
status = -NFS4ERR_BAD_STATEID;
|
|
return status;
|
|
}
|
|
status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
|
|
dst_lock, FMODE_WRITE);
|
|
if (status) {
|
|
if (status == -EAGAIN)
|
|
status = -NFS4ERR_BAD_STATEID;
|
|
return status;
|
|
}
|
|
|
|
res.dst_fattr = nfs_alloc_fattr();
|
|
if (!res.dst_fattr)
|
|
return -ENOMEM;
|
|
|
|
nfs4_bitmask_set(dst_bitmask, server->cache_consistency_bitmask,
|
|
dst_inode, NFS_INO_INVALID_BLOCKS);
|
|
|
|
status = nfs4_call_sync(server->client, server, msg,
|
|
&args.seq_args, &res.seq_res, 0);
|
|
trace_nfs4_clone(src_inode, dst_inode, &args, status);
|
|
if (status == 0) {
|
|
/* a zero-length count means clone to EOF in src */
|
|
if (count == 0 && res.dst_fattr->valid & NFS_ATTR_FATTR_SIZE)
|
|
count = nfs_size_to_loff_t(res.dst_fattr->size) - dst_offset;
|
|
nfs42_copy_dest_done(dst_inode, dst_offset, count);
|
|
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;
|
|
}
|
|
|
|
#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
|
|
|
|
static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs42_removexattrargs args = {
|
|
.fh = NFS_FH(inode),
|
|
.xattr_name = name,
|
|
};
|
|
struct nfs42_removexattrres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int ret;
|
|
unsigned long timestamp = jiffies;
|
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
|
|
&res.seq_res, 1);
|
|
trace_nfs4_removexattr(inode, name, ret);
|
|
if (!ret)
|
|
nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
|
|
const void *buf, size_t buflen, int flags)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct page *pages[NFS4XATTR_MAXPAGES];
|
|
struct nfs42_setxattrargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.xattr_pages = pages,
|
|
.xattr_len = buflen,
|
|
.xattr_name = name,
|
|
.xattr_flags = flags,
|
|
};
|
|
struct nfs42_setxattrres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int ret, np;
|
|
unsigned long timestamp = jiffies;
|
|
|
|
if (buflen > server->sxasize)
|
|
return -ERANGE;
|
|
|
|
if (buflen > 0) {
|
|
np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
|
|
if (np < 0)
|
|
return np;
|
|
} else
|
|
np = 0;
|
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
|
|
&res.seq_res, 1);
|
|
trace_nfs4_setxattr(inode, name, ret);
|
|
|
|
for (; np > 0; np--)
|
|
put_page(pages[np - 1]);
|
|
|
|
if (!ret)
|
|
nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
|
|
void *buf, size_t buflen, struct page **pages,
|
|
size_t plen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs42_getxattrargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.xattr_name = name,
|
|
};
|
|
struct nfs42_getxattrres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
ssize_t ret;
|
|
|
|
arg.xattr_len = plen;
|
|
arg.xattr_pages = pages;
|
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
|
|
&res.seq_res, 0);
|
|
trace_nfs4_getxattr(inode, name, ret);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Normally, the caching is done one layer up, but for successful
|
|
* RPCS, always cache the result here, even if the caller was
|
|
* just querying the length, or if the reply was too big for
|
|
* the caller. This avoids a second RPC in the case of the
|
|
* common query-alloc-retrieve cycle for xattrs.
|
|
*
|
|
* Note that xattr_len is always capped to XATTR_SIZE_MAX.
|
|
*/
|
|
|
|
nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
|
|
|
|
if (buflen) {
|
|
if (res.xattr_len > buflen)
|
|
return -ERANGE;
|
|
_copy_from_pages(buf, pages, 0, res.xattr_len);
|
|
}
|
|
|
|
return res.xattr_len;
|
|
}
|
|
|
|
static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
|
|
size_t buflen, u64 *cookiep, bool *eofp)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct page **pages;
|
|
struct nfs42_listxattrsargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.cookie = *cookiep,
|
|
};
|
|
struct nfs42_listxattrsres res = {
|
|
.eof = false,
|
|
.xattr_buf = buf,
|
|
.xattr_len = buflen,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
u32 xdrlen;
|
|
int ret, np, i;
|
|
|
|
|
|
ret = -ENOMEM;
|
|
res.scratch = alloc_page(GFP_KERNEL);
|
|
if (!res.scratch)
|
|
goto out;
|
|
|
|
xdrlen = nfs42_listxattr_xdrsize(buflen);
|
|
if (xdrlen > server->lxasize)
|
|
xdrlen = server->lxasize;
|
|
np = xdrlen / PAGE_SIZE + 1;
|
|
|
|
pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
|
|
if (!pages)
|
|
goto out_free_scratch;
|
|
for (i = 0; i < np; i++) {
|
|
pages[i] = alloc_page(GFP_KERNEL);
|
|
if (!pages[i])
|
|
goto out_free_pages;
|
|
}
|
|
|
|
arg.xattr_pages = pages;
|
|
arg.count = xdrlen;
|
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
|
|
&res.seq_res, 0);
|
|
trace_nfs4_listxattr(inode, ret);
|
|
|
|
if (ret >= 0) {
|
|
ret = res.copied;
|
|
*cookiep = res.cookie;
|
|
*eofp = res.eof;
|
|
}
|
|
|
|
out_free_pages:
|
|
while (--np >= 0) {
|
|
if (pages[np])
|
|
__free_page(pages[np]);
|
|
}
|
|
kfree(pages);
|
|
out_free_scratch:
|
|
__free_page(res.scratch);
|
|
out:
|
|
return ret;
|
|
|
|
}
|
|
|
|
ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
|
|
void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
ssize_t err, np, i;
|
|
struct page **pages;
|
|
|
|
np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
|
|
pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
|
|
if (!pages)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < np; i++) {
|
|
pages[i] = alloc_page(GFP_KERNEL);
|
|
if (!pages[i]) {
|
|
np = i + 1;
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The GETXATTR op has no length field in the call, and the
|
|
* xattr data is at the end of the reply.
|
|
*
|
|
* There is no downside in using the page-aligned length. It will
|
|
* allow receiving and caching xattrs that are too large for the
|
|
* caller but still fit in the page-rounded value.
|
|
*/
|
|
do {
|
|
err = _nfs42_proc_getxattr(inode, name, buf, buflen,
|
|
pages, np * PAGE_SIZE);
|
|
if (err >= 0)
|
|
break;
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
out:
|
|
while (--np >= 0)
|
|
__free_page(pages[np]);
|
|
kfree(pages);
|
|
|
|
return err;
|
|
}
|
|
|
|
int nfs42_proc_setxattr(struct inode *inode, const char *name,
|
|
const void *buf, size_t buflen, int flags)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
|
|
if (!err)
|
|
break;
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
return err;
|
|
}
|
|
|
|
ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
|
|
size_t buflen, u64 *cookiep, bool *eofp)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
ssize_t err;
|
|
|
|
do {
|
|
err = _nfs42_proc_listxattrs(inode, buf, buflen,
|
|
cookiep, eofp);
|
|
if (err >= 0)
|
|
break;
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
return err;
|
|
}
|
|
|
|
int nfs42_proc_removexattr(struct inode *inode, const char *name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs42_proc_removexattr(inode, name);
|
|
if (!err)
|
|
break;
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
return err;
|
|
}
|