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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_MCLIENTREQUEST_H
#define CEPH_MCLIENTREQUEST_H
/**
*
* MClientRequest - container for a client METADATA request. created/sent by clients.
* can be forwarded around between MDS's.
*
* int client - the originating client
* long tid - transaction id, unique among requests for that client. probably just a counter!
* -> the MDS passes the Request to the Reply constructor, so this always matches.
*
* int op - the metadata op code. MDS_OP_RENAME, etc.
* int caller_uid, _gid - guess
*
* fixed size arguments are in a union.
* there's also a string argument, for e.g. symlink().
*
*/
#include "msg/Message.h"
#include "include/filepath.h"
#include "mds/mdstypes.h"
#include <sys/types.h>
#include <utime.h>
#include <sys/stat.h>
#include <fcntl.h>
// metadata ops.
class MClientRequest : public Message {
public:
struct ceph_mds_request_head head;
struct Release {
mutable ceph_mds_request_release item;
string dname;
Release() : item(), dname() {}
Release(const ceph_mds_request_release& rel, string name) :
item(rel), dname(name) {}
void encode(bufferlist& bl) const {
item.dname_len = dname.length();
::encode(item, bl);
::encode_nohead(dname, bl);
}
void decode(bufferlist::iterator& bl) {
::decode(item, bl);
::decode_nohead(item.dname_len, dname, bl);
}
};
vector<Release> releases;
// path arguments
filepath path, path2;
public:
// cons
MClientRequest() : Message(CEPH_MSG_CLIENT_REQUEST) {}
MClientRequest(int op) : Message(CEPH_MSG_CLIENT_REQUEST) {
memset(&head, 0, sizeof(head));
head.op = op;
}
private:
~MClientRequest() {}
public:
void set_mdsmap_epoch(epoch_t e) { head.mdsmap_epoch = e; }
epoch_t get_mdsmap_epoch() { return head.mdsmap_epoch; }
metareqid_t get_reqid() {
// FIXME: for now, assume clients always have 1 incarnation
return metareqid_t(get_orig_source(), header.tid);
}
/*bool open_file_mode_is_readonly() {
return file_mode_is_readonly(ceph_flags_to_mode(head.args.open.flags));
}*/
bool may_write() {
return
(head.op & CEPH_MDS_OP_WRITE) ||
(head.op == CEPH_MDS_OP_OPEN && (head.args.open.flags & (O_CREAT|O_TRUNC))) ||
(head.op == CEPH_MDS_OP_CREATE);
}
int get_flags() const {
return head.flags;
}
bool is_replay() {
return get_flags() & CEPH_MDS_FLAG_REPLAY;
}
// normal fields
void set_oldest_client_tid(tid_t t) { head.oldest_client_tid = t; }
void inc_num_fwd() { head.num_fwd = head.num_fwd + 1; }
void set_retry_attempt(int a) { head.num_retry = a; }
void set_filepath(const filepath& fp) { path = fp; }
void set_filepath2(const filepath& fp) { path2 = fp; }
void set_string2(const char *s) { path2.set_path(s, 0); }
void set_caller_uid(unsigned u) { head.caller_uid = u; }
void set_caller_gid(unsigned g) { head.caller_gid = g; }
void set_dentry_wanted() {
head.flags = head.flags | CEPH_MDS_FLAG_WANT_DENTRY;
}
void set_replayed_op() {
head.flags = head.flags | CEPH_MDS_FLAG_REPLAY;
}
tid_t get_oldest_client_tid() const { return head.oldest_client_tid; }
int get_num_fwd() const { return head.num_fwd; }
int get_retry_attempt() const { return head.num_retry; }
int get_op() const { return head.op; }
unsigned get_caller_uid() const { return head.caller_uid; }
unsigned get_caller_gid() const { return head.caller_gid; }
const string& get_path() const { return path.get_path(); }
const filepath& get_filepath() const { return path; }
const string& get_path2() const { return path2.get_path(); }
const filepath& get_filepath2() const { return path2; }
int get_dentry_wanted() { return get_flags() & CEPH_MDS_FLAG_WANT_DENTRY; }
void decode_payload() {
bufferlist::iterator p = payload.begin();
::decode(head, p);
::decode(path, p);
::decode(path2, p);
::decode_nohead(head.num_releases, releases, p);
}
void encode_payload(uint64_t features) {
head.num_releases = releases.size();
::encode(head, payload);
::encode(path, payload);
::encode(path2, payload);
::encode_nohead(releases, payload);
}
const char *get_type_name() const { return "creq"; }
void print(ostream& out) const {
out << "client_request(" << get_orig_source()
<< ":" << get_tid()
<< " " << ceph_mds_op_name(get_op());
if (head.op == CEPH_MDS_OP_GETATTR)
out << " " << ccap_string(head.args.getattr.mask);
if (head.op == CEPH_MDS_OP_SETATTR) {
if (head.args.setattr.mask & CEPH_SETATTR_MODE)
out << " mode=0" << std::oct << head.args.setattr.mode << std::dec;
if (head.args.setattr.mask & CEPH_SETATTR_UID)
out << " uid=" << head.args.setattr.uid;
if (head.args.setattr.mask & CEPH_SETATTR_GID)
out << " gid=" << head.args.setattr.gid;
if (head.args.setattr.mask & CEPH_SETATTR_SIZE)
out << " size=" << head.args.setattr.size;
if (head.args.setattr.mask & CEPH_SETATTR_MTIME)
out << " mtime=" << utime_t(head.args.setattr.mtime);
if (head.args.setattr.mask & CEPH_SETATTR_ATIME)
out << " atime=" << utime_t(head.args.setattr.atime);
}
if (head.op == CEPH_MDS_OP_SETFILELOCK ||
head.op == CEPH_MDS_OP_GETFILELOCK) {
out << "rule " << (int)head.args.filelock_change.rule
<< ", type " << (int)head.args.filelock_change.type
<< ", pid " << head.args.filelock_change.pid
<< ", pid_ns " << head.args.filelock_change.pid_namespace
<< ", start " << head.args.filelock_change.start
<< ", length " << head.args.filelock_change.length
<< ", wait " << (int)head.args.filelock_change.wait;
}
//if (!get_filepath().empty())
out << " " << get_filepath();
if (!get_filepath2().empty())
out << " " << get_filepath2();
if (head.num_retry)
out << " RETRY=" << (int)head.num_retry;
if (get_flags() & CEPH_MDS_FLAG_REPLAY)
out << " REPLAY";
out << ")";
}
};
WRITE_CLASS_ENCODER(MClientRequest::Release)
#endif
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