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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "include/fs_types.h"
#include "common/Formatter.h"
#include "include/ceph_features.h"
#include "common/ceph_json.h"
void dump(const ceph_file_layout& l, ceph::Formatter *f)
{
f->dump_unsigned("stripe_unit", l.fl_stripe_unit);
f->dump_unsigned("stripe_count", l.fl_stripe_count);
f->dump_unsigned("object_size", l.fl_object_size);
if (l.fl_cas_hash)
f->dump_unsigned("cas_hash", l.fl_cas_hash);
if (l.fl_object_stripe_unit)
f->dump_unsigned("object_stripe_unit", l.fl_object_stripe_unit);
if (l.fl_pg_pool)
f->dump_unsigned("pg_pool", l.fl_pg_pool);
}
void dump(const ceph_dir_layout& l, ceph::Formatter *f)
{
f->dump_unsigned("dir_hash", l.dl_dir_hash);
f->dump_unsigned("unused1", l.dl_unused1);
f->dump_unsigned("unused2", l.dl_unused2);
f->dump_unsigned("unused3", l.dl_unused3);
}
// file_layout_t
bool file_layout_t::is_valid() const
{
/* stripe unit, object size must be non-zero, 64k increment */
if (!stripe_unit || (stripe_unit & (CEPH_MIN_STRIPE_UNIT-1)))
return false;
if (!object_size || (object_size & (CEPH_MIN_STRIPE_UNIT-1)))
return false;
/* object size must be a multiple of stripe unit */
if (object_size < stripe_unit || object_size % stripe_unit)
return false;
/* stripe count must be non-zero */
if (!stripe_count)
return false;
return true;
}
void file_layout_t::from_legacy(const ceph_file_layout& fl)
{
stripe_unit = fl.fl_stripe_unit;
stripe_count = fl.fl_stripe_count;
object_size = fl.fl_object_size;
pool_id = (int32_t)fl.fl_pg_pool;
// in the legacy encoding, a zeroed structure was the default and
// would have pool 0 instead of -1.
if (pool_id == 0 && stripe_unit == 0 && stripe_count == 0 && object_size == 0)
pool_id = -1;
pool_ns.clear();
}
void file_layout_t::to_legacy(ceph_file_layout *fl) const
{
fl->fl_stripe_unit = stripe_unit;
fl->fl_stripe_count = stripe_count;
fl->fl_object_size = object_size;
fl->fl_cas_hash = 0;
fl->fl_object_stripe_unit = 0;
fl->fl_unused = 0;
// in the legacy encoding, pool 0 was undefined.
if (pool_id >= 0)
fl->fl_pg_pool = pool_id;
else
fl->fl_pg_pool = 0;
}
void file_layout_t::encode(ceph::buffer::list& bl, uint64_t features) const
{
using ceph::encode;
if ((features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) == 0) {
ceph_file_layout fl;
ceph_assert((stripe_unit & 0xff) == 0); // first byte must be 0
to_legacy(&fl);
encode(fl, bl);
return;
}
ENCODE_START(2, 2, bl);
encode(stripe_unit, bl);
encode(stripe_count, bl);
encode(object_size, bl);
encode(pool_id, bl);
encode(pool_ns, bl);
ENCODE_FINISH(bl);
}
void file_layout_t::decode(ceph::buffer::list::const_iterator& p)
{
using ceph::decode;
if (*p == 0) {
ceph_file_layout fl;
decode(fl, p);
from_legacy(fl);
return;
}
DECODE_START(2, p);
decode(stripe_unit, p);
decode(stripe_count, p);
decode(object_size, p);
decode(pool_id, p);
decode(pool_ns, p);
DECODE_FINISH(p);
}
void file_layout_t::dump(ceph::Formatter *f) const
{
f->dump_unsigned("stripe_unit", stripe_unit);
f->dump_unsigned("stripe_count", stripe_count);
f->dump_unsigned("object_size", object_size);
f->dump_int("pool_id", pool_id);
f->dump_string("pool_ns", pool_ns);
}
void file_layout_t::decode_json(JSONObj *obj){
JSONDecoder::decode_json("stripe_unit", stripe_unit, obj, true);
JSONDecoder::decode_json("stripe_count", stripe_count, obj, true);
JSONDecoder::decode_json("object_size", object_size, obj, true);
JSONDecoder::decode_json("pool_id", pool_id, obj, true);
JSONDecoder::decode_json("pool_ns", pool_ns, obj, true);
}
void file_layout_t::generate_test_instances(std::list<file_layout_t*>& o)
{
o.push_back(new file_layout_t);
o.push_back(new file_layout_t);
o.back()->stripe_unit = 4096;
o.back()->stripe_count = 16;
o.back()->object_size = 1048576;
o.back()->pool_id = 3;
o.back()->pool_ns = "myns";
}
std::ostream& operator<<(std::ostream& out, const file_layout_t &layout)
{
ceph::JSONFormatter f;
layout.dump(&f);
f.flush(out);
return out;
}
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