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osd_types.cc
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osd_types.cc
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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) 2011 New Dream Network
* Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
*
* Author: Loic Dachary <loic@dachary.org>
*
* 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.
*
*/
#include <list>
#include <map>
#include <ostream>
#include <sstream>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include <boost/assign/list_of.hpp>
#include "include/ceph_features.h"
#include "include/encoding.h"
#include "include/stringify.h"
extern "C" {
#include "crush/hash.h"
}
#include "common/Formatter.h"
#include "OSDMap.h"
#include "osd_types.h"
#include "os/Transaction.h"
using std::list;
using std::make_pair;
using std::map;
using std::ostream;
using std::ostringstream;
using std::pair;
using std::set;
using std::string;
using std::stringstream;
using std::unique_ptr;
using std::vector;
using ceph::decode;
using ceph::decode_nohead;
using ceph::encode;
using ceph::encode_nohead;
using ceph::Formatter;
using namespace std::literals;
const char *ceph_osd_flag_name(unsigned flag)
{
switch (flag) {
case CEPH_OSD_FLAG_ACK: return "ack";
case CEPH_OSD_FLAG_ONNVRAM: return "onnvram";
case CEPH_OSD_FLAG_ONDISK: return "ondisk";
case CEPH_OSD_FLAG_RETRY: return "retry";
case CEPH_OSD_FLAG_READ: return "read";
case CEPH_OSD_FLAG_WRITE: return "write";
case CEPH_OSD_FLAG_ORDERSNAP: return "ordersnap";
case CEPH_OSD_FLAG_PEERSTAT_OLD: return "peerstat_old";
case CEPH_OSD_FLAG_BALANCE_READS: return "balance_reads";
case CEPH_OSD_FLAG_PARALLELEXEC: return "parallelexec";
case CEPH_OSD_FLAG_PGOP: return "pgop";
case CEPH_OSD_FLAG_EXEC: return "exec";
case CEPH_OSD_FLAG_EXEC_PUBLIC: return "exec_public";
case CEPH_OSD_FLAG_LOCALIZE_READS: return "localize_reads";
case CEPH_OSD_FLAG_RWORDERED: return "rwordered";
case CEPH_OSD_FLAG_IGNORE_CACHE: return "ignore_cache";
case CEPH_OSD_FLAG_SKIPRWLOCKS: return "skiprwlocks";
case CEPH_OSD_FLAG_IGNORE_OVERLAY: return "ignore_overlay";
case CEPH_OSD_FLAG_FLUSH: return "flush";
case CEPH_OSD_FLAG_MAP_SNAP_CLONE: return "map_snap_clone";
case CEPH_OSD_FLAG_ENFORCE_SNAPC: return "enforce_snapc";
case CEPH_OSD_FLAG_REDIRECTED: return "redirected";
case CEPH_OSD_FLAG_KNOWN_REDIR: return "known_if_redirected";
case CEPH_OSD_FLAG_FULL_TRY: return "full_try";
case CEPH_OSD_FLAG_FULL_FORCE: return "full_force";
case CEPH_OSD_FLAG_IGNORE_REDIRECT: return "ignore_redirect";
case CEPH_OSD_FLAG_RETURNVEC: return "returnvec";
default: return "???";
}
}
string ceph_osd_flag_string(unsigned flags)
{
string s;
for (unsigned i=0; i<32; ++i) {
if (flags & (1u<<i)) {
if (s.length())
s += "+";
s += ceph_osd_flag_name(1u << i);
}
}
if (s.length())
return s;
return string("-");
}
const char * ceph_osd_op_flag_name(unsigned flag)
{
const char *name;
switch(flag) {
case CEPH_OSD_OP_FLAG_EXCL:
name = "excl";
break;
case CEPH_OSD_OP_FLAG_FAILOK:
name = "failok";
break;
case CEPH_OSD_OP_FLAG_FADVISE_RANDOM:
name = "fadvise_random";
break;
case CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL:
name = "fadvise_sequential";
break;
case CEPH_OSD_OP_FLAG_FADVISE_WILLNEED:
name = "favise_willneed";
break;
case CEPH_OSD_OP_FLAG_FADVISE_DONTNEED:
name = "fadvise_dontneed";
break;
case CEPH_OSD_OP_FLAG_FADVISE_NOCACHE:
name = "fadvise_nocache";
break;
case CEPH_OSD_OP_FLAG_WITH_REFERENCE:
name = "with_reference";
break;
case CEPH_OSD_OP_FLAG_BYPASS_CLEAN_CACHE:
name = "bypass_clean_cache";
break;
default:
name = "???";
};
return name;
}
string ceph_osd_op_flag_string(unsigned flags)
{
string s;
for (unsigned i=0; i<32; ++i) {
if (flags & (1u<<i)) {
if (s.length())
s += "+";
s += ceph_osd_op_flag_name(1u << i);
}
}
if (s.length())
return s;
return string("-");
}
string ceph_osd_alloc_hint_flag_string(unsigned flags)
{
string s;
for (unsigned i=0; i<32; ++i) {
if (flags & (1u<<i)) {
if (s.length())
s += "+";
s += ceph_osd_alloc_hint_flag_name(1u << i);
}
}
if (s.length())
return s;
return string("-");
}
void pg_shard_t::encode(ceph::buffer::list &bl) const
{
ENCODE_START(1, 1, bl);
encode(osd, bl);
encode(shard, bl);
ENCODE_FINISH(bl);
}
void pg_shard_t::decode(ceph::buffer::list::const_iterator &bl)
{
DECODE_START(1, bl);
decode(osd, bl);
decode(shard, bl);
DECODE_FINISH(bl);
}
ostream &operator<<(ostream &lhs, const pg_shard_t &rhs)
{
if (rhs.is_undefined())
return lhs << "?";
if (rhs.shard == shard_id_t::NO_SHARD)
return lhs << rhs.get_osd();
return lhs << rhs.get_osd() << '(' << (unsigned)(rhs.shard) << ')';
}
void dump(Formatter* f, const osd_alerts_t& alerts)
{
for (auto& a : alerts) {
string s0 = " osd: ";
s0 += stringify(a.first);
string s;
for (auto& aa : a.second) {
s = s0;
s += " ";
s += aa.first;
s += ":";
s += aa.second;
f->dump_string("alert", s);
}
}
}
// -- osd_reqid_t --
void osd_reqid_t::dump(Formatter *f) const
{
f->dump_stream("name") << name;
f->dump_int("inc", inc);
f->dump_unsigned("tid", tid);
}
void osd_reqid_t::generate_test_instances(list<osd_reqid_t*>& o)
{
o.push_back(new osd_reqid_t);
o.push_back(new osd_reqid_t(entity_name_t::CLIENT(123), 1, 45678));
}
// -- object_locator_t --
void object_locator_t::encode(ceph::buffer::list& bl) const
{
// verify that nobody's corrupted the locator
ceph_assert(hash == -1 || key.empty());
__u8 encode_compat = 3;
ENCODE_START(6, encode_compat, bl);
encode(pool, bl);
int32_t preferred = -1; // tell old code there is no preferred osd (-1).
encode(preferred, bl);
encode(key, bl);
encode(nspace, bl);
encode(hash, bl);
if (hash != -1)
encode_compat = std::max<std::uint8_t>(encode_compat, 6); // need to interpret the hash
ENCODE_FINISH_NEW_COMPAT(bl, encode_compat);
}
void object_locator_t::decode(ceph::buffer::list::const_iterator& p)
{
DECODE_START_LEGACY_COMPAT_LEN(6, 3, 3, p);
if (struct_v < 2) {
int32_t op;
decode(op, p);
pool = op;
int16_t pref;
decode(pref, p);
} else {
decode(pool, p);
int32_t preferred;
decode(preferred, p);
}
decode(key, p);
if (struct_v >= 5)
decode(nspace, p);
if (struct_v >= 6)
decode(hash, p);
else
hash = -1;
DECODE_FINISH(p);
// verify that nobody's corrupted the locator
ceph_assert(hash == -1 || key.empty());
}
void object_locator_t::dump(Formatter *f) const
{
f->dump_int("pool", pool);
f->dump_string("key", key);
f->dump_string("namespace", nspace);
f->dump_int("hash", hash);
}
void object_locator_t::generate_test_instances(list<object_locator_t*>& o)
{
o.push_back(new object_locator_t);
o.push_back(new object_locator_t(123));
o.push_back(new object_locator_t(123, 876));
o.push_back(new object_locator_t(1, "n2"));
o.push_back(new object_locator_t(1234, "", "key"));
o.push_back(new object_locator_t(12, "n1", "key2"));
}
// -- request_redirect_t --
void request_redirect_t::encode(ceph::buffer::list& bl) const
{
ENCODE_START(1, 1, bl);
encode(redirect_locator, bl);
encode(redirect_object, bl);
// legacy of the removed osd_instructions member
encode((uint32_t)0, bl);
ENCODE_FINISH(bl);
}
void request_redirect_t::decode(ceph::buffer::list::const_iterator& bl)
{
DECODE_START(1, bl);
uint32_t legacy_osd_instructions_len;
decode(redirect_locator, bl);
decode(redirect_object, bl);
decode(legacy_osd_instructions_len, bl);
if (legacy_osd_instructions_len) {
bl += legacy_osd_instructions_len;
}
DECODE_FINISH(bl);
}
void request_redirect_t::dump(Formatter *f) const
{
f->dump_string("object", redirect_object);
f->open_object_section("locator");
redirect_locator.dump(f);
f->close_section(); // locator
}
void request_redirect_t::generate_test_instances(list<request_redirect_t*>& o)
{
object_locator_t loc(1, "redir_obj");
o.push_back(new request_redirect_t());
o.push_back(new request_redirect_t(loc, 0));
o.push_back(new request_redirect_t(loc, "redir_obj"));
o.push_back(new request_redirect_t(loc));
}
void objectstore_perf_stat_t::dump(Formatter *f) const
{
// *_ms values just for compatibility.
f->dump_float("commit_latency_ms", os_commit_latency_ns / 1000000.0);
f->dump_float("apply_latency_ms", os_apply_latency_ns / 1000000.0);
f->dump_unsigned("commit_latency_ns", os_commit_latency_ns);
f->dump_unsigned("apply_latency_ns", os_apply_latency_ns);
}
void objectstore_perf_stat_t::encode(ceph::buffer::list &bl, uint64_t features) const
{
uint8_t target_v = 2;
if (!HAVE_FEATURE(features, OS_PERF_STAT_NS)) {
target_v = 1;
}
ENCODE_START(target_v, target_v, bl);
if (target_v >= 2) {
encode(os_commit_latency_ns, bl);
encode(os_apply_latency_ns, bl);
} else {
constexpr auto NS_PER_MS = std::chrono::nanoseconds(1ms).count();
uint32_t commit_latency_ms = os_commit_latency_ns / NS_PER_MS;
uint32_t apply_latency_ms = os_apply_latency_ns / NS_PER_MS;
encode(commit_latency_ms, bl); // for compatibility with older monitor.
encode(apply_latency_ms, bl); // for compatibility with older monitor.
}
ENCODE_FINISH(bl);
}
void objectstore_perf_stat_t::decode(ceph::buffer::list::const_iterator &bl)
{
DECODE_START(2, bl);
if (struct_v >= 2) {
decode(os_commit_latency_ns, bl);
decode(os_apply_latency_ns, bl);
} else {
uint32_t commit_latency_ms;
uint32_t apply_latency_ms;
decode(commit_latency_ms, bl);
decode(apply_latency_ms, bl);
constexpr auto NS_PER_MS = std::chrono::nanoseconds(1ms).count();
os_commit_latency_ns = commit_latency_ms * NS_PER_MS;
os_apply_latency_ns = apply_latency_ms * NS_PER_MS;
}
DECODE_FINISH(bl);
}
void objectstore_perf_stat_t::generate_test_instances(std::list<objectstore_perf_stat_t*>& o)
{
o.push_back(new objectstore_perf_stat_t());
o.push_back(new objectstore_perf_stat_t());
o.back()->os_commit_latency_ns = 20000000;
o.back()->os_apply_latency_ns = 30000000;
}
// -- osd_stat_t --
void osd_stat_t::dump(Formatter *f, bool with_net) const
{
f->dump_unsigned("up_from", up_from);
f->dump_unsigned("seq", seq);
f->dump_unsigned("num_pgs", num_pgs);
f->dump_unsigned("num_osds", num_osds);
f->dump_unsigned("num_per_pool_osds", num_per_pool_osds);
f->dump_unsigned("num_per_pool_omap_osds", num_per_pool_omap_osds);
/// dump legacy stats fields to ensure backward compatibility.
f->dump_unsigned("kb", statfs.kb());
f->dump_unsigned("kb_used", statfs.kb_used_raw());
f->dump_unsigned("kb_used_data", statfs.kb_used_data());
f->dump_unsigned("kb_used_omap", statfs.kb_used_omap());
f->dump_unsigned("kb_used_meta", statfs.kb_used_internal_metadata());
f->dump_unsigned("kb_avail", statfs.kb_avail());
////////////////////
f->open_object_section("statfs");
statfs.dump(f);
f->close_section();
f->open_array_section("hb_peers");
for (auto p : hb_peers)
f->dump_int("osd", p);
f->close_section();
f->dump_int("snap_trim_queue_len", snap_trim_queue_len);
f->dump_int("num_snap_trimming", num_snap_trimming);
f->dump_int("num_shards_repaired", num_shards_repaired);
f->open_object_section("op_queue_age_hist");
op_queue_age_hist.dump(f);
f->close_section();
f->open_object_section("perf_stat");
os_perf_stat.dump(f);
f->close_section();
f->open_array_section("alerts");
::dump(f, os_alerts);
f->close_section();
if (with_net) {
dump_ping_time(f);
}
}
void osd_stat_t::dump_ping_time(Formatter *f) const
{
f->open_array_section("network_ping_times");
for (auto &i : hb_pingtime) {
f->open_object_section("entry");
f->dump_int("osd", i.first);
const time_t lu(i.second.last_update);
char buffer[26];
string lustr(ctime_r(&lu, buffer));
lustr.pop_back(); // Remove trailing \n
f->dump_string("last update", lustr);
f->open_array_section("interfaces");
f->open_object_section("interface");
f->dump_string("interface", "back");
f->open_object_section("average");
f->dump_float("1min", i.second.back_pingtime[0]/1000.0);
f->dump_float("5min", i.second.back_pingtime[1]/1000.0);
f->dump_float("15min", i.second.back_pingtime[2]/1000.0);
f->close_section(); // average
f->open_object_section("min");
f->dump_float("1min", i.second.back_min[0]/1000.0);
f->dump_float("5min", i.second.back_min[1]/1000.0);
f->dump_float("15min", i.second.back_min[2]/1000.0);
f->close_section(); // min
f->open_object_section("max");
f->dump_float("1min", i.second.back_max[0]/1000.0);
f->dump_float("5min", i.second.back_max[1]/1000.0);
f->dump_float("15min", i.second.back_max[2]/1000.0);
f->close_section(); // max
f->dump_float("last", i.second.back_last/1000.0);
f->close_section(); // interface
if (i.second.front_pingtime[0] != 0) {
f->open_object_section("interface");
f->dump_string("interface", "front");
f->open_object_section("average");
f->dump_float("1min", i.second.front_pingtime[0]/1000.0);
f->dump_float("5min", i.second.front_pingtime[1]/1000.0);
f->dump_float("15min", i.second.front_pingtime[2]/1000.0);
f->close_section(); // average
f->open_object_section("min");
f->dump_float("1min", i.second.front_min[0]/1000.0);
f->dump_float("5min", i.second.front_min[1]/1000.0);
f->dump_float("15min", i.second.front_min[2]/1000.0);
f->close_section(); // min
f->open_object_section("max");
f->dump_float("1min", i.second.front_max[0]/1000.0);
f->dump_float("5min", i.second.front_max[1]/1000.0);
f->dump_float("15min", i.second.front_max[2]/1000.0);
f->close_section(); // max
f->dump_float("last", i.second.front_last/1000.0);
f->close_section(); // interface
}
f->close_section(); // interfaces
f->close_section(); // entry
}
f->close_section(); // network_ping_time
}
void osd_stat_t::encode(ceph::buffer::list &bl, uint64_t features) const
{
ENCODE_START(14, 2, bl);
//////// for compatibility ////////
int64_t kb = statfs.kb();
int64_t kb_used = statfs.kb_used_raw();
int64_t kb_avail = statfs.kb_avail();
encode(kb, bl);
encode(kb_used, bl);
encode(kb_avail, bl);
///////////////////////////////////
encode(snap_trim_queue_len, bl);
encode(num_snap_trimming, bl);
encode(hb_peers, bl);
encode((uint32_t)0, bl);
encode(op_queue_age_hist, bl);
encode(os_perf_stat, bl, features);
encode(up_from, bl);
encode(seq, bl);
encode(num_pgs, bl);
//////// for compatibility ////////
int64_t kb_used_data = statfs.kb_used_data();
int64_t kb_used_omap = statfs.kb_used_omap();
int64_t kb_used_meta = statfs.kb_used_internal_metadata();
encode(kb_used_data, bl);
encode(kb_used_omap, bl);
encode(kb_used_meta, bl);
encode(statfs, bl);
///////////////////////////////////
encode(os_alerts, bl);
encode(num_shards_repaired, bl);
encode(num_osds, bl);
encode(num_per_pool_osds, bl);
encode(num_per_pool_omap_osds, bl);
// hb_pingtime map
encode((int)hb_pingtime.size(), bl);
for (auto i : hb_pingtime) {
encode(i.first, bl); // osd
encode(i.second.last_update, bl);
encode(i.second.back_pingtime[0], bl);
encode(i.second.back_pingtime[1], bl);
encode(i.second.back_pingtime[2], bl);
encode(i.second.back_min[0], bl);
encode(i.second.back_min[1], bl);
encode(i.second.back_min[2], bl);
encode(i.second.back_max[0], bl);
encode(i.second.back_max[1], bl);
encode(i.second.back_max[2], bl);
encode(i.second.back_last, bl);
encode(i.second.front_pingtime[0], bl);
encode(i.second.front_pingtime[1], bl);
encode(i.second.front_pingtime[2], bl);
encode(i.second.front_min[0], bl);
encode(i.second.front_min[1], bl);
encode(i.second.front_min[2], bl);
encode(i.second.front_max[0], bl);
encode(i.second.front_max[1], bl);
encode(i.second.front_max[2], bl);
encode(i.second.front_last, bl);
}
ENCODE_FINISH(bl);
}
void osd_stat_t::decode(ceph::buffer::list::const_iterator &bl)
{
int64_t kb, kb_used,kb_avail;
int64_t kb_used_data, kb_used_omap, kb_used_meta;
DECODE_START_LEGACY_COMPAT_LEN(14, 2, 2, bl);
decode(kb, bl);
decode(kb_used, bl);
decode(kb_avail, bl);
decode(snap_trim_queue_len, bl);
decode(num_snap_trimming, bl);
decode(hb_peers, bl);
vector<int> num_hb_out;
decode(num_hb_out, bl);
if (struct_v >= 3)
decode(op_queue_age_hist, bl);
if (struct_v >= 4)
decode(os_perf_stat, bl);
if (struct_v >= 6) {
decode(up_from, bl);
decode(seq, bl);
}
if (struct_v >= 7) {
decode(num_pgs, bl);
}
if (struct_v >= 8) {
decode(kb_used_data, bl);
decode(kb_used_omap, bl);
decode(kb_used_meta, bl);
} else {
kb_used_data = kb_used;
kb_used_omap = 0;
kb_used_meta = 0;
}
if (struct_v >= 9) {
decode(statfs, bl);
} else {
statfs.reset();
statfs.total = kb << 10;
statfs.available = kb_avail << 10;
// actually it's totally unexpected to have ststfs.total < statfs.available
// here but unfortunately legacy generate_test_instances produced such a
// case hence inserting some handling rather than assert
statfs.internally_reserved =
statfs.total > statfs.available ? statfs.total - statfs.available : 0;
kb_used <<= 10;
if ((int64_t)statfs.internally_reserved > kb_used) {
statfs.internally_reserved -= kb_used;
} else {
statfs.internally_reserved = 0;
}
statfs.allocated = kb_used_data << 10;
statfs.omap_allocated = kb_used_omap << 10;
statfs.internal_metadata = kb_used_meta << 10;
}
if (struct_v >= 10) {
decode(os_alerts, bl);
} else {
os_alerts.clear();
}
if (struct_v >= 11) {
decode(num_shards_repaired, bl);
} else {
num_shards_repaired = 0;
}
if (struct_v >= 12) {
decode(num_osds, bl);
decode(num_per_pool_osds, bl);
} else {
num_osds = 0;
num_per_pool_osds = 0;
}
if (struct_v >= 13) {
decode(num_per_pool_omap_osds, bl);
} else {
num_per_pool_omap_osds = 0;
}
hb_pingtime.clear();
if (struct_v >= 14) {
int count;
decode(count, bl);
for (int i = 0 ; i < count ; i++) {
int osd;
decode(osd, bl);
struct Interfaces ifs;
decode(ifs.last_update, bl);
decode(ifs.back_pingtime[0],bl);
decode(ifs.back_pingtime[1], bl);
decode(ifs.back_pingtime[2], bl);
decode(ifs.back_min[0],bl);
decode(ifs.back_min[1], bl);
decode(ifs.back_min[2], bl);
decode(ifs.back_max[0],bl);
decode(ifs.back_max[1], bl);
decode(ifs.back_max[2], bl);
decode(ifs.back_last, bl);
decode(ifs.front_pingtime[0], bl);
decode(ifs.front_pingtime[1], bl);
decode(ifs.front_pingtime[2], bl);
decode(ifs.front_min[0], bl);
decode(ifs.front_min[1], bl);
decode(ifs.front_min[2], bl);
decode(ifs.front_max[0], bl);
decode(ifs.front_max[1], bl);
decode(ifs.front_max[2], bl);
decode(ifs.front_last, bl);
hb_pingtime[osd] = ifs;
}
}
DECODE_FINISH(bl);
}
void osd_stat_t::generate_test_instances(std::list<osd_stat_t*>& o)
{
o.push_back(new osd_stat_t);
o.push_back(new osd_stat_t);
list<store_statfs_t*> ll;
store_statfs_t::generate_test_instances(ll);
o.back()->statfs = *ll.back();
o.back()->hb_peers.push_back(7);
o.back()->snap_trim_queue_len = 8;
o.back()->num_snap_trimming = 99;
o.back()->num_shards_repaired = 101;
o.back()->os_alerts[0].emplace(
"some alert", "some alert details");
o.back()->os_alerts[1].emplace(
"some alert2", "some alert2 details");
struct Interfaces gen_interfaces = {
123456789, { 1000, 900, 800 }, { 990, 890, 790 }, { 1010, 910, 810 }, 1001,
{ 1100, 1000, 900 }, { 1090, 990, 890 }, { 1110, 1010, 910 }, 1101 };
o.back()->hb_pingtime[20] = gen_interfaces;
gen_interfaces = {
987654321, { 100, 200, 300 }, { 90, 190, 290 }, { 110, 210, 310 }, 101 };
o.back()->hb_pingtime[30] = gen_interfaces;
}
// -- pg_t --
int pg_t::print(char *o, int maxlen) const
{
return snprintf(o, maxlen, "%llu.%x", (unsigned long long)pool(), ps());
}
bool pg_t::parse(const char *s)
{
uint64_t ppool;
uint32_t pseed;
int r = sscanf(s, "%llu.%x", (long long unsigned *)&ppool, &pseed);
if (r < 2)
return false;
m_pool = ppool;
m_seed = pseed;
return true;
}
bool spg_t::parse(const char *s)
{
shard = shard_id_t::NO_SHARD;
uint64_t ppool;
uint32_t pseed;
uint32_t pshard;
int r = sscanf(s, "%llu.%x", (long long unsigned *)&ppool, &pseed);
if (r < 2)
return false;
pgid.set_pool(ppool);
pgid.set_ps(pseed);
const char *p = strchr(s, 's');
if (p) {
r = sscanf(p, "s%u", &pshard);
if (r == 1) {
shard = shard_id_t(pshard);
} else {
return false;
}
}
return true;
}
char *spg_t::calc_name(char *buf, const char *suffix_backwords) const
{
while (*suffix_backwords)
*--buf = *suffix_backwords++;
if (!is_no_shard()) {
buf = ritoa<uint8_t, 10>((uint8_t)shard.id, buf);
*--buf = 's';
}
return pgid.calc_name(buf, "");
}
ostream& operator<<(ostream& out, const spg_t &pg)
{
char buf[spg_t::calc_name_buf_size];
buf[spg_t::calc_name_buf_size - 1] = '\0';
out << pg.calc_name(buf + spg_t::calc_name_buf_size - 1, "");
return out;
}
pg_t pg_t::get_ancestor(unsigned old_pg_num) const
{
int old_bits = cbits(old_pg_num);
int old_mask = (1 << old_bits) - 1;
pg_t ret = *this;
ret.m_seed = ceph_stable_mod(m_seed, old_pg_num, old_mask);
return ret;
}
bool pg_t::is_split(unsigned old_pg_num, unsigned new_pg_num, set<pg_t> *children) const
{
//ceph_assert(m_seed < old_pg_num);
if (m_seed >= old_pg_num) {
// degenerate case
return false;
}
if (new_pg_num <= old_pg_num)
return false;
bool split = false;
if (true) {
unsigned old_bits = cbits(old_pg_num);
unsigned old_mask = (1 << old_bits) - 1;
for (unsigned n = 1; ; n++) {
unsigned next_bit = (n << (old_bits-1));
unsigned s = next_bit | m_seed;
if (s < old_pg_num || s == m_seed)
continue;
if (s >= new_pg_num)
break;
if ((unsigned)ceph_stable_mod(s, old_pg_num, old_mask) == m_seed) {
split = true;
if (children)
children->insert(pg_t(s, m_pool));
}
}
}
if (false) {
// brute force
int old_bits = cbits(old_pg_num);
int old_mask = (1 << old_bits) - 1;
for (unsigned x = old_pg_num; x < new_pg_num; ++x) {
unsigned o = ceph_stable_mod(x, old_pg_num, old_mask);
if (o == m_seed) {
split = true;
children->insert(pg_t(x, m_pool));
}
}
}
return split;
}
unsigned pg_t::get_split_bits(unsigned pg_num) const {
if (pg_num == 1)
return 0;
ceph_assert(pg_num > 1);
// Find unique p such that pg_num \in [2^(p-1), 2^p)
unsigned p = cbits(pg_num);
ceph_assert(p); // silence coverity #751330
if ((m_seed % (1<<(p-1))) < (pg_num % (1<<(p-1))))
return p;
else
return p - 1;
}
bool pg_t::is_merge_source(
unsigned old_pg_num,
unsigned new_pg_num,
pg_t *parent) const
{
if (m_seed < old_pg_num &&
m_seed >= new_pg_num) {
if (parent) {
pg_t t = *this;
while (t.m_seed >= new_pg_num) {
t = t.get_parent();
}
*parent = t;
}
return true;
}
return false;
}
pg_t pg_t::get_parent() const
{
unsigned bits = cbits(m_seed);
ceph_assert(bits);
pg_t retval = *this;
retval.m_seed &= ~((~0)<<(bits - 1));
return retval;
}
hobject_t pg_t::get_hobj_start() const
{
return hobject_t(object_t(), string(), 0, m_seed, m_pool,
string());
}
hobject_t pg_t::get_hobj_end(unsigned pg_num) const
{
// note: this assumes a bitwise sort; with the legacy nibblewise
// sort a PG did not always cover a single contiguous range of the
// (bit-reversed) hash range.
unsigned bits = get_split_bits(pg_num);
uint64_t rev_start = hobject_t::_reverse_bits(m_seed);
uint64_t rev_end = (rev_start | (0xffffffff >> bits)) + 1;
if (rev_end >= 0x100000000) {
ceph_assert(rev_end == 0x100000000);
return hobject_t::get_max();
} else {
return hobject_t(object_t(), string(), CEPH_NOSNAP,
hobject_t::_reverse_bits(rev_end), m_pool,
string());
}
}
void pg_t::dump(Formatter *f) const
{
f->dump_unsigned("pool", m_pool);
f->dump_unsigned("seed", m_seed);
}
void pg_t::generate_test_instances(list<pg_t*>& o)
{
o.push_back(new pg_t);
o.push_back(new pg_t(1, 2));
o.push_back(new pg_t(13123, 3));
o.push_back(new pg_t(131223, 4));
}
char *pg_t::calc_name(char *buf, const char *suffix_backwords) const
{
while (*suffix_backwords)
*--buf = *suffix_backwords++;
buf = ritoa<uint32_t, 16>(m_seed, buf);
*--buf = '.';
return ritoa<uint64_t, 10>(m_pool, buf);
}
ostream& operator<<(ostream& out, const pg_t &pg)
{
char buf[pg_t::calc_name_buf_size];
buf[pg_t::calc_name_buf_size - 1] = '\0';
out << pg.calc_name(buf + pg_t::calc_name_buf_size - 1, "");
return out;
}
// -- coll_t --
void coll_t::calc_str()
{
switch (type) {
case TYPE_META:
strcpy(_str_buff, "meta");
_str = _str_buff;
break;
case TYPE_PG:
_str_buff[spg_t::calc_name_buf_size - 1] = '\0';
_str = pgid.calc_name(_str_buff + spg_t::calc_name_buf_size - 1, "daeh_");
break;
case TYPE_PG_TEMP:
_str_buff[spg_t::calc_name_buf_size - 1] = '\0';
_str = pgid.calc_name(_str_buff + spg_t::calc_name_buf_size - 1, "PMET_");
break;
default:
ceph_abort_msg("unknown collection type");
}
}
bool coll_t::parse(const std::string& s)
{
if (s == "meta") {
type = TYPE_META;
pgid = spg_t();
removal_seq = 0;
calc_str();
ceph_assert(s == _str);
return true;
}
if (s.find("_head") == s.length() - 5 &&
pgid.parse(s.substr(0, s.length() - 5))) {
type = TYPE_PG;
removal_seq = 0;
calc_str();
ceph_assert(s == _str);
return true;
}
if (s.find("_TEMP") == s.length() - 5 &&
pgid.parse(s.substr(0, s.length() - 5))) {
type = TYPE_PG_TEMP;
removal_seq = 0;
calc_str();
ceph_assert(s == _str);
return true;
}
return false;
}
void coll_t::encode(ceph::buffer::list& bl) const
{
using ceph::encode;
// when changing this, remember to update encoded_size() too.
if (is_temp()) {
// can't express this as v2...
__u8 struct_v = 3;
encode(struct_v, bl);
encode(to_str(), bl);
} else {
__u8 struct_v = 2;
encode(struct_v, bl);
encode((__u8)type, bl);
encode(pgid, bl);
snapid_t snap = CEPH_NOSNAP;
encode(snap, bl);
}
}
size_t coll_t::encoded_size() const
{
size_t r = sizeof(__u8);
if (is_temp()) {
// v3
r += sizeof(__u32);
if (_str) {
r += strlen(_str);
}
} else {
// v2
// 1. type
r += sizeof(__u8);