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+# DeepSleep RFC Logupload Workflow
+
+## Scope
+
+This document captures the exact runtime flow when the power state transitions from ON to LIGHT_SLEEP in `entservices-systemservices`, and how that invocation is handled by `dcm-agent/uploadstblogs`.
+
+It includes both RFC cases for:
+
+`Device.DeviceInfo.X_RDKCENTRAL-COM_RFC.Feature.LogUploadBeforeDeepSleep.Enable`
+
+## Source Paths
+
+- `rdkcentral/entservices-systemservices`:
+  - `plugin/SystemServicesImplementation.cpp`
+  - `plugin/uploadlogs.cpp`
+- `rdkcentral/dcm-agent`:
+  - `uploadstblogs/src/uploadstblogs.c`
+  - `uploadstblogs/src/strategy_selector.c`
+  - `uploadstblogs/src/strategies.c`
+  - `uploadstblogs/src/context_manager.c`
+
+## Trigger Point in SystemServices
+
+When power mode changes, `SystemServicesImplementation::OnSystemPowerStateChanged(...)` checks:
+
+- New state is `LIGHT_SLEEP` (or `STANDBY`)
+- Previous state is `ON`
+
+Then it reads RFC:
+
+`RFC_LOG_UPLOAD = Device.DeviceInfo.X_RDKCENTRAL-COM_RFC.Feature.LogUploadBeforeDeepSleep.Enable`
+
+Behavior:
+
+- If RFC value is boolean `true` -> calls `UploadLogsAsync(result)`
+- If RFC is missing, read fails, wrong type, or value is `false` -> no upload is started from this path
+
+Also, on transition to `DEEP_SLEEP`, SystemServices aborts an active upload process if one is running.
+
+## Exact UploadLogsAsync -> logupload Flow
+
+`UploadLogsAsync()` in SystemServices:
+
+1. Checks if another upload PID is tracked.
+2. If running, calls `AbortLogUpload(...)`.
+3. Starts a new upload via `UploadLogs::logUploadAsync()`.
+
+`logUploadAsync()` (`plugin/uploadlogs.cpp`) builds and executes:
+
+- Binary: `/usr/bin/logupload`
+- Via `fork()` + `execve()`
+
+Argument vector used:
+
+1. `/usr/bin/logupload`
+2. `<tftp_server>`
+3. `0`        (FLAG)
+4. `1`        (DCM_FLAG)
+5. `false`    (UploadOnReboot)
+6. `<upload_protocol>`
+7. `<upload_httplink>`
+8. `1`
+9. `false`
+
+## How dcm-agent Interprets This Invocation
+
+`uploadstblogs` binary entry:
+
+- `main()` -> `uploadstblogs_execute(argc, argv)`
+- acquires `/tmp/.log-upload.lock`
+- initializes context
+- parses args
+- chooses strategy via `early_checks(...)`
+
+Important for this call:
+
+- `FLAG = 0`
+- `DCM_FLAG = 1`
+
+In `strategy_selector.c`, this selects `STRAT_DCM`.
+
+## Which Function Uploads and Which Folder Is Uploaded
+
+### Upload function
+
+For this path, actual upload is done by:
+
+- `upload_archive(ctx, session, archive_path)`
+
+called from:
+
+- `dcm_upload(...)` in `uploadstblogs/src/strategies.c`
+
+### Folder packaged into archive
+
+For this path, archive input directory is:
+
+- `ctx->dcm_log_path`
+
+used in:
+
+- `dcm_archive(...)` -> `create_archive(ctx, session, ctx->dcm_log_path)`
+
+`ctx->dcm_log_path` resolution from `context_manager.c`:
+
+- Reads `DCM_LOG_PATH` from `/etc/device.properties`
+- If absent, defaults to:
+
+`/tmp/DCM/`
+
+Therefore, for the SystemServices deep-sleep RFC-triggered call, logs are uploaded from:
+
+- configured `DCM_LOG_PATH`
+- default fallback: `/tmp/DCM/`
+
+## RFC True vs False: Exact Behavior
+
+### Case A: RFC is true
+
+Condition:
+
+- Transition is `ON` -> `LIGHT_SLEEP`
+- RFC read succeeds
+- RFC boolean value is `true`
+
+Result:
+
+- `UploadLogsAsync()` is called
+- `/usr/bin/logupload` is executed
+- dcm-agent selects `STRAT_DCM`
+- archive is created from `ctx->dcm_log_path` (default `/tmp/DCM/`)
+- upload performed through `upload_archive(...)`
+
+### Case B: RFC is false
+
+Condition:
+
+- Transition is `ON` -> `LIGHT_SLEEP`
+- RFC value is `false` (or read/type validation does not satisfy true branch)
+
+Result:
+
+- `UploadLogsAsync()` is not called by this power-state RFC gate
+- `/usr/bin/logupload` is not started from this specific path
+- no DCM archive/upload is triggered from this RFC path
+
+## Deep Sleep Transition Note
+
+When state becomes `DEEP_SLEEP`, SystemServices checks active upload PID and aborts if running. This affects an in-flight upload started earlier, but does not change the true/false gate behavior at ON -> LIGHT_SLEEP.
+
+## Mode State Diagram (Power + RFC Gate)
+
+```mermaid
+stateDiagram-v2
+  [*] --> ON
+
+  ON --> LIGHT_SLEEP: Power change ON->LIGHT_SLEEP
+  state LIGHT_SLEEP {
+    [*] --> EvaluateRFC
+    EvaluateRFC --> StartUpload: RFC_LOG_UPLOAD == true
+    EvaluateRFC --> NoUpload: RFC_LOG_UPLOAD != true
+  }
+
+  StartUpload --> UploadRunning: UploadLogsAsync() + execve(/usr/bin/logupload)
+  NoUpload --> IdleInLightSleep: No upload from RFC gate
+
+  LIGHT_SLEEP --> DEEP_SLEEP: Power change to DEEP_SLEEP
+  UploadRunning --> UploadAborted: AbortLogUpload() on DEEP_SLEEP
+
+  DEEP_SLEEP --> LIGHT_SLEEP: Wake path
+  LIGHT_SLEEP --> ON: Resume active mode
+
+  UploadAborted --> [*]
+```
+
+## Combined Workflow Diagram (rdkservices + dcm-agent)
+
+```mermaid
+flowchart LR
+  subgraph RDK[entservices-systemservices repo]
+    PM[Power Manager Event]
+    S1[SystemServicesImplementation::OnSystemPowerStateChanged]
+    R1[getRFCParameter RFC_LOG_UPLOAD]
+    U1[UploadLogsAsync]
+    U2[UploadLogs::logUploadAsync]
+    EX[execve /usr/bin/logupload]
+    AB[AbortLogUpload on DEEP_SLEEP]
+  end
+
+  subgraph DCM[dcm-agent repo]
+    M1[uploadstblogs main]
+    E1[uploadstblogs_execute]
+    L1[Acquire /tmp/.log-upload.lock]
+    C1[init_context + parse args]
+    S2[early_checks -> STRAT_DCM]
+    A1[dcm_archive create_archive ctx->dcm_log_path]
+    A2[dcm_upload upload_archive]
+  end
+
+  PM --> S1
+  S1 --> R1
+  R1 -->|true| U1
+  R1 -->|false or invalid| N1[No upload from RFC path]
+  U1 --> U2 --> EX --> M1 --> E1 --> L1 --> C1 --> S2 --> A1 --> A2
+  S1 -->|state becomes DEEP_SLEEP| AB
+
+  D1[Source folder from DCM_LOG_PATH or default /tmp/DCM/] --> A1
+```
+
+## End-to-End Sequence
+
+```mermaid
+sequenceDiagram
+    participant PM as Power Manager
+    participant SS as SystemServicesImplementation
+    participant RFC as RFC Store
+    participant UL as uploadlogs.cpp
+    participant LU as /usr/bin/logupload
+    participant DCM as dcm-agent uploadstblogs
+
+    PM->>SS: OnSystemPowerStateChanged(ON, LIGHT_SLEEP)
+    SS->>RFC: getRFCParameter(RFC_LOG_UPLOAD)
+
+    alt RFC_LOG_UPLOAD == true
+        SS->>UL: UploadLogsAsync()
+        UL->>UL: logUploadAsync()
+        UL->>LU: fork + execve(/usr/bin/logupload ...)
+        LU->>DCM: uploadstblogs_execute(argc, argv)
+        DCM->>DCM: early_checks -> STRAT_DCM
+        DCM->>DCM: create_archive(ctx->dcm_log_path)
+        DCM->>DCM: upload_archive(...)
+    else RFC_LOG_UPLOAD != true
+        SS-->>SS: Do not start upload from this gate
+    end
+
+    PM->>SS: OnSystemPowerStateChanged(*, DEEP_SLEEP)
+    SS->>SS: AbortLogUpload() if PID is active
+```