GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/ingestion/task_chunk.cc
Date: 2025-08-31 02:39:21
Exec Total Coverage
Lines: 89 91 97.8%
Branches: 90 149 60.4%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "ingestion/task_chunk.h"
6
7 #include <unistd.h>
8
9 #include <cassert>
10
11 #include "util/exception.h"
12
13 /**
14 * The tags from the read stage in the pipeline and the tags given in the
15 * chunking stage can safely overlap. Nevertheless, debugging might be easier
16 * if they don't. So let's start with a high number.
17 */
18 atomic_int64 TaskChunk::tag_seq_ = 2 << 28;
19
20 /**
21 * Consumes the stream of input blocks and produces new output blocks according
22 * to cut marks. The output blocks correspond to chunks.
23 */
24 9940943 void TaskChunk::Process(BlockItem *input_block) {
25 9940943 FileItem *file_item = input_block->file_item();
26 9939269 const int64_t input_tag = input_block->tag();
27
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 9948035 assert((file_item != NULL) && (input_tag >= 0));
28
29 9944003 ChunkInfo chunk_info;
30 // Do we see blocks of the file for the first time?
31
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 9948161 if (!tag_map_.Lookup(input_tag, &chunk_info)) {
32 // We may have only regular chunks, only a bulk chunk, or both. We may
33 // end up in a situation where we produced only a single non-bulk chunk.
34 // This needs to be fixed up later in the pipeline by the write task.
35
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 4495172 if (file_item->may_have_chunks()) {
36
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 214 chunk_info.next_chunk = new ChunkItem(file_item, 0);
37 214 chunk_info.output_tag_chunk = atomic_xadd64(&tag_seq_, 1);
38
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 214 if (file_item->has_legacy_bulk_chunk()) {
39
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 184 chunk_info.bulk_chunk = new ChunkItem(file_item, 0);
40 }
41 } else {
42
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 4493338 chunk_info.bulk_chunk = new ChunkItem(file_item, 0);
43 }
44
45
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 4493948 if (chunk_info.bulk_chunk != NULL) {
46
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 4494044 chunk_info.bulk_chunk->MakeBulkChunk();
47 4490930 chunk_info.bulk_chunk->set_size(file_item->size());
48 4490534 chunk_info.output_tag_bulk = atomic_xadd64(&tag_seq_, 1);
49 }
50
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 4500428 tag_map_.Insert(input_tag, chunk_info);
51 }
52
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 9962597 assert((chunk_info.bulk_chunk != NULL) || (chunk_info.next_chunk != NULL));
53
54 9962597 BlockItem *output_block_bulk = NULL;
55
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 9962597 if (chunk_info.bulk_chunk != NULL) {
56
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 9928281 output_block_bulk = new BlockItem(chunk_info.output_tag_bulk, allocator_);
57
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 9916977 output_block_bulk->SetFileItem(file_item);
58
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 9915447 output_block_bulk->SetChunkItem(chunk_info.bulk_chunk);
59 }
60
61 9952247 ChunkDetector *chunk_detector = file_item->chunk_detector();
62
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 9964613 switch (input_block->type()) {
63 4487486 case BlockItem::kBlockStop:
64 // End of the file, no more new chunks
65 4487486 file_item->set_is_fully_chunked();
66
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 4496270 if (output_block_bulk)
67
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 4496312 output_block_bulk->MakeStop();
68
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 4487252 if (chunk_info.next_chunk != NULL) {
69
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 214 assert(file_item->size() >= chunk_info.next_chunk->offset());
70 428 chunk_info.next_chunk->set_size(file_item->size()
71 214 - chunk_info.next_chunk->offset());
72 BlockItem *block_stop = new BlockItem(chunk_info.output_tag_chunk,
73
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 214 allocator_);
74
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 214 block_stop->SetFileItem(file_item);
75
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 214 block_stop->SetChunkItem(chunk_info.next_chunk);
76
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 214 block_stop->MakeStop();
77
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 214 tubes_out_->Dispatch(block_stop);
78 }
79
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 4487252 tag_map_.Erase(input_tag);
80 4488656 break;
81
82 5493381 case BlockItem::kBlockData:
83
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 5493381 if (output_block_bulk) {
84
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 5448421 if (chunk_info.next_chunk != NULL) {
85 // Reserve zero-copy for the regular chunk
86
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 488178 output_block_bulk->MakeDataCopy(input_block->data(),
87 input_block->size());
88 } else {
89 // There is only the bulk chunk, zero copy
90
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 4960243 output_block_bulk->MakeDataMove(input_block);
91 }
92 }
93
94
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 5493723 if (chunk_info.next_chunk != NULL) {
95 533030 unsigned offset_in_block = 0;
96 533030 uint64_t cut_mark = 0;
97
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 560198 while ((cut_mark = chunk_detector->FindNextCutMark(input_block)) != 0) {
98
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 27168 assert(cut_mark >= chunk_info.offset + offset_in_block);
99 27168 const uint64_t cut_mark_in_block = cut_mark - chunk_info.offset;
100
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 27168 assert(cut_mark_in_block >= offset_in_block);
101
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 27168 assert(cut_mark_in_block <= input_block->size());
102 27168 const unsigned tail_size = cut_mark_in_block - offset_in_block;
103
104
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 27168 if (tail_size > 0) {
105 BlockItem *block_tail = new BlockItem(chunk_info.output_tag_chunk,
106
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 27168 allocator_);
107
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 27168 block_tail->SetFileItem(file_item);
108
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 27168 block_tail->SetChunkItem(chunk_info.next_chunk);
109
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 27168 block_tail->MakeDataCopy(input_block->data() + offset_in_block,
110 tail_size);
111
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 27168 tubes_out_->Dispatch(block_tail);
112 }
113
114
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 27168 assert(cut_mark >= chunk_info.next_chunk->offset());
115 // If the cut mark happens to at the end of file, let the final
116 // incoming stop block schedule dispatch of the chunk stop block
117
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 27168 if (cut_mark < file_item->size()) {
118 27164 chunk_info.next_chunk->set_size(cut_mark
119 27164 - chunk_info.next_chunk->offset());
120 BlockItem *block_stop = new BlockItem(chunk_info.output_tag_chunk,
121
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 27164 allocator_);
122
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 27164 block_stop->SetFileItem(file_item);
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 27164 block_stop->SetChunkItem(chunk_info.next_chunk);
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 27164 block_stop->MakeStop();
125
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 27164 tubes_out_->Dispatch(block_stop);
126
127
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 27164 chunk_info.next_chunk = new ChunkItem(file_item, cut_mark);
128 27164 chunk_info.output_tag_chunk = atomic_xadd64(&tag_seq_, 1);
129 }
130 27168 offset_in_block = cut_mark_in_block;
131 }
132 532886 chunk_info.offset += offset_in_block;
133
134
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 532886 assert(input_block->size() >= offset_in_block);
135 532904 const unsigned tail_size = input_block->size() - offset_in_block;
136
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 532904 if (tail_size > 0) {
137 BlockItem *block_tail = new BlockItem(chunk_info.output_tag_chunk,
138
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 531942 allocator_);
139
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 531780 block_tail->SetFileItem(file_item);
140
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 531690 block_tail->SetChunkItem(chunk_info.next_chunk);
141
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 531726 block_tail->MakeDataCopy(input_block->data() + offset_in_block,
142 tail_size);
143
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 532032 tubes_out_->Dispatch(block_tail);
144 531978 chunk_info.offset += tail_size;
145 }
146
147 // Delete data from incoming block
148
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 532940 input_block->Reset();
149 }
150
151
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 5493741 tag_map_.Insert(input_tag, chunk_info);
152 5500689 break;
153
154 ✗ default:
155 ✗ PANIC(NULL);
156 }
157
158
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 9989345 delete input_block;
159
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 9994745 if (output_block_bulk)
160
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 9950043 tubes_out_->Dispatch(output_block_bulk);
161 9957593 }
162