(vol, key string, buf []byte, offset uint64, size uint32)
| 54 | } |
| 55 | |
| 56 | func (c *BcacheClient) Get(vol, key string, buf []byte, offset uint64, size uint32) (int, error) { |
| 57 | var err error |
| 58 | bgTime := stat.BeginStat() |
| 59 | defer func() { |
| 60 | stat.EndStat("bcache-get", err, bgTime, 1) |
| 61 | }() |
| 62 | req := &GetCacheRequest{ |
| 63 | CacheKey: key, |
| 64 | Offset: offset, |
| 65 | Size: size, |
| 66 | } |
| 67 | packet := NewBlockCachePacket() |
| 68 | packet.Opcode = OpBlockCacheGet |
| 69 | data, err := req.Marshal() |
| 70 | if err != nil { |
| 71 | log.LogDebugf("get block cache: req(%v) err(%v)", req.CacheKey, err) |
| 72 | return 0, err |
| 73 | } |
| 74 | defer func() { |
| 75 | bytespool.Free(data) |
| 76 | }() |
| 77 | packet.Data = data |
| 78 | packet.Size = uint32(len(packet.Data)) |
| 79 | stat.EndStat("bcache-get-marshal", err, bgTime, 1) |
| 80 | conn, err := c.connPool.Get() |
| 81 | if err != nil { |
| 82 | log.LogDebugf("get block cache: get Conn failed, req(%v) err(%v)", req.CacheKey, err) |
| 83 | return 0, err |
| 84 | } |
| 85 | defer func() { |
| 86 | c.connPool.Put(conn) |
| 87 | }() |
| 88 | stat.EndStat("bcache-get-conn", err, bgTime, 1) |
| 89 | getCachePathMetric := exporter.NewTPCnt("bcache-get-cachepath") |
| 90 | err = packet.WriteToConn(*conn) |
| 91 | if err != nil { |
| 92 | log.LogDebugf("Failed to write to conn, req(%v) err(%v)", req.CacheKey, err) |
| 93 | getCachePathMetric.SetWithLabels(err, map[string]string{exporter.Vol: vol}) |
| 94 | return 0, errors.NewErrorf("Failed to write to conn, req(%v) err(%v)", req.CacheKey, err) |
| 95 | } |
| 96 | stat.EndStat("bcache-get-writeconn", err, bgTime, 1) |
| 97 | err = packet.ReadFromConn(*conn, 1) |
| 98 | if err != nil { |
| 99 | log.LogDebugf("Failed to read from conn, req(%v), err(%v)", req.CacheKey, err) |
| 100 | getCachePathMetric.SetWithLabels(err, map[string]string{exporter.Vol: vol}) |
| 101 | return 0, errors.NewErrorf("Failed to read from conn, req(%v), err(%v)", req.CacheKey, err) |
| 102 | } |
| 103 | stat.EndStat("bcache-get-readconn", err, bgTime, 1) |
| 104 | |
| 105 | status := parseStatus(packet.ResultCode) |
| 106 | if status != statusOK { |
| 107 | err = errors.New(packet.GetResultMsg()) |
| 108 | log.LogDebugf("get block cache: req(%v) err(%v) result(%v)", req.CacheKey, err, packet.GetResultMsg()) |
| 109 | getCachePathMetric.SetWithLabels(err, map[string]string{exporter.Vol: vol}) |
| 110 | return 0, err |
| 111 | } |
| 112 | |
| 113 | resp := new(GetCachePathResponse) |
nothing calls this directly
no test coverage detected