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
201
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "rgw_compression.h"
#define dout_subsys ceph_subsys_rgw
int rgw_compression_info_from_attr(const bufferlist& attr,
bool& need_decompress,
RGWCompressionInfo& cs_info)
{
auto bliter = attr.cbegin();
try {
decode(cs_info, bliter);
} catch (buffer::error& err) {
return -EIO;
}
if (cs_info.blocks.size() == 0) {
return -EIO;
}
if (cs_info.compression_type != "none")
need_decompress = true;
else
need_decompress = false;
return 0;
}
int rgw_compression_info_from_attrset(const map<string, bufferlist>& attrs,
bool& need_decompress,
RGWCompressionInfo& cs_info)
{
auto value = attrs.find(RGW_ATTR_COMPRESSION);
if (value == attrs.end()) {
need_decompress = false;
return 0;
}
return rgw_compression_info_from_attr(value->second, need_decompress, cs_info);
}
//------------RGWPutObj_Compress---------------
int RGWPutObj_Compress::process(bufferlist&& in, uint64_t logical_offset)
{
bufferlist out;
if (in.length() > 0) {
// compression stuff
if ((logical_offset > 0 && compressed) || // if previous part was compressed
(logical_offset == 0)) { // or it's the first part
ldout(cct, 10) << "Compression for rgw is enabled, compress part " << in.length() << dendl;
int cr = compressor->compress(in, out);
if (cr < 0) {
if (logical_offset > 0) {
lderr(cct) << "Compression failed with exit code " << cr
<< " for next part, compression process failed" << dendl;
return -EIO;
}
compressed = false;
ldout(cct, 5) << "Compression failed with exit code " << cr
<< " for first part, storing uncompressed" << dendl;
out.claim(in);
} else {
compressed = true;
compression_block newbl;
size_t bs = blocks.size();
newbl.old_ofs = logical_offset;
newbl.new_ofs = bs > 0 ? blocks[bs-1].len + blocks[bs-1].new_ofs : 0;
newbl.len = out.length();
blocks.push_back(newbl);
}
} else {
compressed = false;
out.claim(in);
}
// end of compression stuff
}
return Pipe::process(std::move(out), logical_offset);
}
//----------------RGWGetObj_Decompress---------------------
RGWGetObj_Decompress::RGWGetObj_Decompress(CephContext* cct_,
RGWCompressionInfo* cs_info_,
bool partial_content_,
RGWGetObj_Filter* next): RGWGetObj_Filter(next),
cct(cct_),
cs_info(cs_info_),
partial_content(partial_content_),
q_ofs(0),
q_len(0),
cur_ofs(0)
{
compressor = Compressor::create(cct, cs_info->compression_type);
if (!compressor.get())
lderr(cct) << "Cannot load compressor of type " << cs_info->compression_type << dendl;
}
int RGWGetObj_Decompress::handle_data(bufferlist& bl, off_t bl_ofs, off_t bl_len)
{
ldout(cct, 10) << "Compression for rgw is enabled, decompress part "
<< "bl_ofs="<< bl_ofs << bl_len << dendl;
if (!compressor.get()) {
// if compressor isn't available - error, because cannot return decompressed data?
lderr(cct) << "Cannot load compressor of type " << cs_info->compression_type << dendl;
return -EIO;
}
bufferlist out_bl, in_bl, temp_in_bl;
bl.copy(bl_ofs, bl_len, temp_in_bl);
bl_ofs = 0;
int r = 0;
if (waiting.length() != 0) {
in_bl.append(waiting);
in_bl.append(temp_in_bl);
waiting.clear();
} else {
in_bl.claim(temp_in_bl);
}
bl_len = in_bl.length();
while (first_block <= last_block) {
bufferlist tmp;
off_t ofs_in_bl = first_block->new_ofs - cur_ofs;
if (ofs_in_bl + (off_t)first_block->len > bl_len) {
// not complete block, put it to waiting
unsigned tail = bl_len - ofs_in_bl;
in_bl.copy(ofs_in_bl, tail, waiting);
cur_ofs -= tail;
break;
}
in_bl.copy(ofs_in_bl, first_block->len, tmp);
int cr = compressor->decompress(tmp, out_bl);
if (cr < 0) {
lderr(cct) << "Decompression failed with exit code " << cr << dendl;
return cr;
}
++first_block;
while (out_bl.length() - q_ofs >= cct->_conf->rgw_max_chunk_size)
{
off_t ch_len = std::min<off_t>(cct->_conf->rgw_max_chunk_size, q_len);
q_len -= ch_len;
r = next->handle_data(out_bl, q_ofs, ch_len);
if (r < 0) {
lderr(cct) << "handle_data failed with exit code " << r << dendl;
return r;
}
out_bl.splice(0, q_ofs + ch_len);
q_ofs = 0;
}
}
cur_ofs += bl_len;
off_t ch_len = std::min<off_t>(out_bl.length() - q_ofs, q_len);
if (ch_len > 0) {
r = next->handle_data(out_bl, q_ofs, ch_len);
if (r < 0) {
lderr(cct) << "handle_data failed with exit code " << r << dendl;
return r;
}
out_bl.splice(0, q_ofs + ch_len);
q_len -= ch_len;
q_ofs = 0;
}
return r;
}
int RGWGetObj_Decompress::fixup_range(off_t& ofs, off_t& end)
{
if (partial_content) {
// if user set range, we need to calculate it in decompressed data
first_block = cs_info->blocks.begin(); last_block = cs_info->blocks.begin();
if (cs_info->blocks.size() > 1) {
vector<compression_block>::iterator fb, lb;
// not bad to use auto for lambda, I think
auto cmp_u = [] (off_t ofs, const compression_block& e) { return (uint64_t)ofs < e.old_ofs; };
auto cmp_l = [] (const compression_block& e, off_t ofs) { return e.old_ofs <= (uint64_t)ofs; };
fb = upper_bound(cs_info->blocks.begin()+1,
cs_info->blocks.end(),
ofs,
cmp_u);
first_block = fb - 1;
lb = lower_bound(fb,
cs_info->blocks.end(),
end,
cmp_l);
last_block = lb - 1;
}
} else {
first_block = cs_info->blocks.begin(); last_block = cs_info->blocks.end() - 1;
}
q_ofs = ofs - first_block->old_ofs;
q_len = end + 1 - ofs;
ofs = first_block->new_ofs;
end = last_block->new_ofs + last_block->len - 1;
cur_ofs = ofs;
waiting.clear();
return next->fixup_range(ofs, end);
}
|
