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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_FILER_H
#define CEPH_FILER_H
/*** Filer
*
* stripe file ranges onto objects.
* build list<ObjectExtent> for the objecter or objectcacher.
*
* also, provide convenience methods that call objecter for you.
*
* "files" are identified by ino.
*/
#include <mutex>
#include "include/types.h"
#include "common/ceph_time.h"
#include "osd/OSDMap.h"
#include "Objecter.h"
#include "Striper.h"
class Context;
class Messenger;
class OSDMap;
class Finisher;
/**** Filer interface ***/
class Filer {
CephContext *cct;
Objecter *objecter;
Finisher *finisher;
// probes
struct Probe {
std::mutex lock;
typedef std::lock_guard<std::mutex> lock_guard;
typedef std::unique_lock<std::mutex> unique_lock;
inodeno_t ino;
file_layout_t layout;
snapid_t snapid;
uint64_t *psize;
ceph::real_time *pmtime;
utime_t *pumtime;
int flags;
bool fwd;
Context *onfinish;
vector<ObjectExtent> probing;
uint64_t probing_off, probing_len;
map<object_t, uint64_t> known_size;
ceph::real_time max_mtime;
set<object_t> ops;
int err;
bool found_size;
Probe(inodeno_t i, file_layout_t &l, snapid_t sn,
uint64_t f, uint64_t *e, ceph::real_time *m, int fl, bool fw,
Context *c) :
ino(i), layout(l), snapid(sn),
psize(e), pmtime(m), pumtime(nullptr), flags(fl), fwd(fw), onfinish(c),
probing_off(f), probing_len(0),
err(0), found_size(false) {}
Probe(inodeno_t i, file_layout_t &l, snapid_t sn,
uint64_t f, uint64_t *e, utime_t *m, int fl, bool fw,
Context *c) :
ino(i), layout(l), snapid(sn),
psize(e), pmtime(nullptr), pumtime(m), flags(fl), fwd(fw),
onfinish(c), probing_off(f), probing_len(0),
err(0), found_size(false) {}
};
class C_Probe;
void _probe(Probe *p, Probe::unique_lock& pl);
bool _probed(Probe *p, const object_t& oid, uint64_t size,
ceph::real_time mtime, Probe::unique_lock& pl);
public:
Filer(const Filer& other);
const Filer operator=(const Filer& other);
Filer(Objecter *o, Finisher *f) : cct(o->cct), objecter(o), finisher(f) {}
~Filer() {}
bool is_active() {
return objecter->is_active(); // || (oc && oc->is_active());
}
/*** async file interface. scatter/gather as needed. ***/
void read(inodeno_t ino,
file_layout_t *layout,
snapid_t snap,
uint64_t offset,
uint64_t len,
bufferlist *bl, // ptr to data
int flags,
Context *onfinish,
int op_flags = 0) {
ceph_assert(snap); // (until there is a non-NOSNAP write)
vector<ObjectExtent> extents;
Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
objecter->sg_read(extents, snap, bl, flags, onfinish, op_flags);
}
void read_trunc(inodeno_t ino,
file_layout_t *layout,
snapid_t snap,
uint64_t offset,
uint64_t len,
bufferlist *bl, // ptr to data
int flags,
uint64_t truncate_size,
__u32 truncate_seq,
Context *onfinish,
int op_flags = 0) {
ceph_assert(snap); // (until there is a non-NOSNAP write)
vector<ObjectExtent> extents;
Striper::file_to_extents(cct, ino, layout, offset, len, truncate_size,
extents);
objecter->sg_read_trunc(extents, snap, bl, flags,
truncate_size, truncate_seq, onfinish, op_flags);
}
void write(inodeno_t ino,
file_layout_t *layout,
const SnapContext& snapc,
uint64_t offset,
uint64_t len,
bufferlist& bl,
ceph::real_time mtime,
int flags,
Context *oncommit,
int op_flags = 0) {
vector<ObjectExtent> extents;
Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
objecter->sg_write(extents, snapc, bl, mtime, flags, oncommit, op_flags);
}
void write_trunc(inodeno_t ino,
file_layout_t *layout,
const SnapContext& snapc,
uint64_t offset,
uint64_t len,
bufferlist& bl,
ceph::real_time mtime,
int flags,
uint64_t truncate_size,
__u32 truncate_seq,
Context *oncommit,
int op_flags = 0) {
vector<ObjectExtent> extents;
Striper::file_to_extents(cct, ino, layout, offset, len, truncate_size,
extents);
objecter->sg_write_trunc(extents, snapc, bl, mtime, flags,
truncate_size, truncate_seq, oncommit, op_flags);
}
void truncate(inodeno_t ino,
file_layout_t *layout,
const SnapContext& snapc,
uint64_t offset,
uint64_t len,
__u32 truncate_seq,
ceph::real_time mtime,
int flags,
Context *oncommit);
void _do_truncate_range(struct TruncRange *pr, int fin);
void zero(inodeno_t ino,
const file_layout_t *layout,
const SnapContext& snapc,
uint64_t offset,
uint64_t len,
ceph::real_time mtime,
int flags,
bool keep_first,
Context *oncommit) {
vector<ObjectExtent> extents;
Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
if (extents.size() == 1) {
if (extents[0].offset == 0 && extents[0].length == layout->object_size
&& (!keep_first || extents[0].objectno != 0))
objecter->remove(extents[0].oid, extents[0].oloc,
snapc, mtime, flags, oncommit);
else
objecter->zero(extents[0].oid, extents[0].oloc, extents[0].offset,
extents[0].length, snapc, mtime, flags, oncommit);
} else {
C_GatherBuilder gcom(cct, oncommit);
for (vector<ObjectExtent>::iterator p = extents.begin();
p != extents.end();
++p) {
if (p->offset == 0 && p->length == layout->object_size &&
(!keep_first || p->objectno != 0))
objecter->remove(p->oid, p->oloc,
snapc, mtime, flags,
oncommit ? gcom.new_sub():0);
else
objecter->zero(p->oid, p->oloc, p->offset, p->length,
snapc, mtime, flags,
oncommit ? gcom.new_sub():0);
}
gcom.activate();
}
}
void zero(inodeno_t ino,
file_layout_t *layout,
const SnapContext& snapc,
uint64_t offset,
uint64_t len,
ceph::real_time mtime,
int flags,
Context *oncommit) {
zero(ino, layout,
snapc, offset,
len, mtime,
flags, false,
oncommit);
}
// purge range of ino.### objects
int purge_range(inodeno_t ino,
const file_layout_t *layout,
const SnapContext& snapc,
uint64_t first_obj, uint64_t num_obj,
ceph::real_time mtime,
int flags, Context *oncommit);
void _do_purge_range(struct PurgeRange *pr, int fin, int err);
/*
* probe
* specify direction,
* and whether we stop when we find data, or hole.
*/
int probe(inodeno_t ino,
file_layout_t *layout,
snapid_t snapid,
uint64_t start_from,
uint64_t *end,
ceph::real_time *mtime,
bool fwd,
int flags,
Context *onfinish);
int probe(inodeno_t ino,
file_layout_t *layout,
snapid_t snapid,
uint64_t start_from,
uint64_t *end,
bool fwd,
int flags,
Context *onfinish) {
return probe(ino, layout, snapid, start_from, end,
(ceph::real_time* )0, fwd, flags, onfinish);
}
int probe(inodeno_t ino,
file_layout_t *layout,
snapid_t snapid,
uint64_t start_from,
uint64_t *end,
utime_t *mtime,
bool fwd,
int flags,
Context *onfinish);
private:
int probe_impl(Probe* probe, file_layout_t *layout,
uint64_t start_from, uint64_t *end);
};
#endif // !CEPH_FILER_H
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