1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
// -*- 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) 2013 Inktank Storage, Inc.
*
* 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 ECTRANSACTION_H
#define ECTRANSACTION_H
#include "OSD.h"
#include "PGBackend.h"
#include "ECUtil.h"
#include "erasure-code/ErasureCodeInterface.h"
#include "PGTransaction.h"
#include "ExtentCache.h"
namespace ECTransaction {
struct WritePlan {
PGTransactionUPtr t;
bool invalidates_cache = false; // Yes, both are possible
std::map<hobject_t,extent_set> to_read;
std::map<hobject_t,extent_set> will_write; // superset of to_read
std::map<hobject_t,ECUtil::HashInfoRef> hash_infos;
};
bool requires_overwrite(
uint64_t prev_size,
const PGTransaction::ObjectOperation &op);
template <typename F>
WritePlan get_write_plan(
const ECUtil::stripe_info_t &sinfo,
PGTransactionUPtr &&t,
F &&get_hinfo,
DoutPrefixProvider *dpp) {
WritePlan plan;
t->safe_create_traverse(
[&](std::pair<const hobject_t, PGTransaction::ObjectOperation> &i) {
ECUtil::HashInfoRef hinfo = get_hinfo(i.first);
plan.hash_infos[i.first] = hinfo;
uint64_t projected_size =
hinfo->get_projected_total_logical_size(sinfo);
if (i.second.deletes_first()) {
ldpp_dout(dpp, 20) << __func__ << ": delete, setting projected size"
<< " to 0" << dendl;
projected_size = 0;
}
hobject_t source;
if (i.second.has_source(&source)) {
plan.invalidates_cache = true;
ECUtil::HashInfoRef shinfo = get_hinfo(source);
projected_size = shinfo->get_projected_total_logical_size(sinfo);
plan.hash_infos[source] = shinfo;
}
auto &will_write = plan.will_write[i.first];
if (i.second.truncate &&
i.second.truncate->first < projected_size) {
if (!(sinfo.logical_offset_is_stripe_aligned(
i.second.truncate->first))) {
plan.to_read[i.first].union_insert(
sinfo.logical_to_prev_stripe_offset(i.second.truncate->first),
sinfo.get_stripe_width());
ldpp_dout(dpp, 20) << __func__ << ": unaligned truncate" << dendl;
will_write.union_insert(
sinfo.logical_to_prev_stripe_offset(i.second.truncate->first),
sinfo.get_stripe_width());
}
projected_size = sinfo.logical_to_next_stripe_offset(
i.second.truncate->first);
}
extent_set raw_write_set;
for (auto &&extent: i.second.buffer_updates) {
using BufferUpdate = PGTransaction::ObjectOperation::BufferUpdate;
if (boost::get<BufferUpdate::CloneRange>(&(extent.get_val()))) {
ceph_assert(
0 ==
"CloneRange is not allowed, do_op should have returned ENOTSUPP");
}
raw_write_set.insert(extent.get_off(), extent.get_len());
}
auto orig_size = projected_size;
for (auto extent = raw_write_set.begin();
extent != raw_write_set.end();
++extent) {
uint64_t head_start =
sinfo.logical_to_prev_stripe_offset(extent.get_start());
uint64_t head_finish =
sinfo.logical_to_next_stripe_offset(extent.get_start());
if (head_start > projected_size) {
head_start = projected_size;
}
if (head_start != head_finish &&
head_start < orig_size) {
ceph_assert(head_finish <= orig_size);
ceph_assert(head_finish - head_start == sinfo.get_stripe_width());
ldpp_dout(dpp, 20) << __func__ << ": reading partial head stripe "
<< head_start << "~" << sinfo.get_stripe_width()
<< dendl;
plan.to_read[i.first].union_insert(
head_start, sinfo.get_stripe_width());
}
uint64_t tail_start =
sinfo.logical_to_prev_stripe_offset(
extent.get_start() + extent.get_len());
uint64_t tail_finish =
sinfo.logical_to_next_stripe_offset(
extent.get_start() + extent.get_len());
if (tail_start != tail_finish &&
(head_start == head_finish || tail_start != head_start) &&
tail_start < orig_size) {
ceph_assert(tail_finish <= orig_size);
ceph_assert(tail_finish - tail_start == sinfo.get_stripe_width());
ldpp_dout(dpp, 20) << __func__ << ": reading partial tail stripe "
<< tail_start << "~" << sinfo.get_stripe_width()
<< dendl;
plan.to_read[i.first].union_insert(
tail_start, sinfo.get_stripe_width());
}
if (head_start != tail_finish) {
ceph_assert(
sinfo.logical_offset_is_stripe_aligned(
tail_finish - head_start)
);
will_write.union_insert(
head_start, tail_finish - head_start);
if (tail_finish > projected_size)
projected_size = tail_finish;
} else {
ceph_assert(tail_finish <= projected_size);
}
}
if (i.second.truncate &&
i.second.truncate->second > projected_size) {
uint64_t truncating_to =
sinfo.logical_to_next_stripe_offset(i.second.truncate->second);
ldpp_dout(dpp, 20) << __func__ << ": truncating out to "
<< truncating_to
<< dendl;
will_write.union_insert(projected_size,
truncating_to - projected_size);
projected_size = truncating_to;
}
ldpp_dout(dpp, 20) << __func__ << ": " << i.first
<< " projected size "
<< projected_size
<< dendl;
hinfo->set_projected_total_logical_size(
sinfo,
projected_size);
/* validate post conditions:
* to_read should have an entry for i.first iff it isn't empty
* and if we are reading from i.first, we can't be renaming or
* cloning it */
ceph_assert(plan.to_read.count(i.first) == 0 ||
(!plan.to_read.at(i.first).empty() &&
!i.second.has_source()));
});
plan.t = std::move(t);
return plan;
}
void generate_transactions(
WritePlan &plan,
ceph::ErasureCodeInterfaceRef &ecimpl,
pg_t pgid,
const ECUtil::stripe_info_t &sinfo,
const std::map<hobject_t,extent_map> &partial_extents,
std::vector<pg_log_entry_t> &entries,
std::map<hobject_t,extent_map> *written,
std::map<shard_id_t, ObjectStore::Transaction> *transactions,
std::set<hobject_t> *temp_added,
std::set<hobject_t> *temp_removed,
DoutPrefixProvider *dpp,
const ceph_release_t require_osd_release = ceph_release_t::unknown);
};
#endif
|
