Strange problem writing to CIFS share

[ehfortin]

Hello,

I've read the few threads regarding similar problems and I don't seems to see the equivalent. I've installed nextpvr on ubuntu 24.04 with the nextpvr-helper. This work a1. I battled with using HDPVR2 and finding an IR blaster that work with my Motorola/Arris receiver which now work very well. So the last thing I wanted to do is to use a CIFS share on my trueness server. The share already exist as it's used by plex and nextpvr when it was on Windows. So, I've created a nextpvr user on truenas and give him full control on this share.

On the ubuntu side, I've added the following line to /etc/fstab:

Code:

//192.168.1.30/Recordings    /mnt/recordings cifs username=nextpvr,password=&&&,uid=998,gid=44 0 0

The aid 44 is for the video group. If I su to user nextpvr on the ubuntu VM, I can access /mnt/recordings, create file, delete them and modify them. If I start recording, nextpvr create the directory and a few files in the directory and even record the first few second of the video but then, the .ts file stop receiving data. That said, nextpvr continue to record for the whole duration of the movie but we only have a few seconds of data.

Code:

drwxr-xr-x 2 nextpvr video       0 Dec 21 14:08  .
drwxr-xr-x 2 nextpvr video       0 Dec 21 14:08  ..
-rwxr-xr-x 1 nextpvr video      23 Dec 21 14:08 'Blue.Beetle.(2023).timing'
-rwxr-xr-x 1 nextpvr video 6329584 Dec 21 14:08 'Blue.Beetle.(2023).ts'
-rwxr-xr-x 1 nextpvr video    1127 Dec 21 14:08 'Blue.Beetle.(2023).xml'

This is an example of the recording. As you can see, I have the usual files created and written to. But as you will see in the log, after writing those files and filling between 4 and 6 MB of the movie, we can see Permission denied.

Code:

2024-12-21 14:08:21.005    [DEBUG][11]    Child PID: 9890
2024-12-21 14:08:21.016    [DEBUG][11]    Creating writer: /mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts
2024-12-21 14:08:21.041    [DEBUG][11]    Created Mutex: Global\NPVR-mutex-7212efbe8df0cd2d233055ac957d4562
2024-12-21 14:08:21.045    [DEBUG][11]    Created map: /mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts.map
2024-12-21 14:08:21.060    [DEBUG][11]    StartStream [/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts] allocated handle: 1
2024-12-21 14:08:21.060    [DEBUG][11]    Started recording (877:1:/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts)
2024-12-21 14:08:21.069    [DEBUG][11]    Starting thumbnail extraction for /mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts
2024-12-21 14:08:34.131    [DEBUG][5]    Got request [192.168.1.101]: /service (recording.lastupdated)
2024-12-21 14:08:34.131    [DEBUG][5]    parameters:
2024-12-21 14:08:34.131    [DEBUG][5]       method: recording.lastupdated
2024-12-21 14:08:34.131    [DEBUG][5]       format: json
2024-12-21 14:08:34.131    [DEBUG][5]       sid: e555ff37-e8af-43fa-9175-78f36f5186fe
2024-12-21 14:08:34.131    [DEBUG][5]       client_ip: 192.168.1.101
2024-12-21 14:08:34.131    [DEBUG][5]       client_local: true
2024-12-21 14:08:34.131    [DEBUG][5]       user_agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
2024-12-21 14:08:34.131    [DEBUG][5]       host_callback: ...
2024-12-21 14:08:34.131    [DEBUG][5]    LastUpdated
2024-12-21 14:08:34.131    [DEBUG][5]    {"last_update":1734808100}

2024-12-21 14:08:34.218    [DEBUG][11]    Running: ffmpeg -re -y -i "/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts" -vf fps=1/10,scale=220:124 -f mjpeg -flush_packets 1 "/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).thumbnails"
2024-12-21 14:08:34.225    [DEBUG][22]    Starting timing extraction for /mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts
2024-12-21 14:08:34.227    [DEBUG][11]    No /var/opt/nextpvr/scripts/ParallelProcessing.sh
2024-12-21 14:08:34.528    [DEBUG][11]    PowerManagement StayAwake (needs implementation)
2024-12-21 14:08:34.528    [DEBUG][11]    Active...staying awake
2024-12-21 14:08:43.236    [DEBUG][22]    Running: "ffprobe" -loglevel error -skip_frame nokey -print_format csv -select_streams v:0 -show_entries frame=best_effort_timestamp_time,pkt_pos "http://127.0.0.1:8866/live?recording_id=877&growing=true&quiet=true&sid=9a35a4724e4344509da7d776d7592ead"
2024-12-21 14:08:43.336    [DEBUG][5]    Got request [127.0.0.1]: /live
2024-12-21 14:08:43.338    [DEBUG][5]    /live?recording_id=877&growing=true&quiet=true&sid=9a35a4724e4344509da7d776d7592ead
2024-12-21 14:08:43.338    [DEBUG][5]     - recording_id: 877
2024-12-21 14:08:43.338    [DEBUG][5]     - growing: true
2024-12-21 14:08:43.338    [DEBUG][5]     - quiet: true
2024-12-21 14:08:43.338    [DEBUG][5]     - sid: 9a35a4724e4344509da7d776d7592ead
2024-12-21 14:08:43.340    [DEBUG][5]    range: bytes=0-
2024-12-21 14:08:43.343    [DEBUG][5]    StreamNative@1..
2024-12-21 14:08:43.343    [DEBUG][5]    StreamNative@2
2024-12-21 14:08:43.343    [DEBUG][5]    StreamNative@3
2024-12-21 14:08:43.343    [DEBUG][5]    StreamNative@4
2024-12-21 14:08:43.346    [DEBUG][5]    RollingFile.Open(/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts) ..
2024-12-21 14:08:43.350    [DEBUG][5]    About to stream recording: /mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts
2024-12-21 14:08:43.350    [DEBUG][5]    Request had range request
2024-12-21 14:08:43.350    [DEBUG][5]    Requested Range: 0- (6329584 bytes)
2024-12-21 14:08:43.364    [ERROR][21]    Unexpected error writing to OutputSink: System.UnauthorizedAccessException: Access to the path '/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts' is denied.
---> System.IO.IOException: Permission denied
   --- End of inner exception stack trace ---
   at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset)
   at System.IO.Strategies.BufferedFileStreamStrategy.WriteSpan(ReadOnlySpan`1 source, ArraySegment`1 arraySegment)
   at System.IO.Strategies.BufferedFileStreamStrategy.Write(Byte[] buffer, Int32 offset, Int32 count)
   at NShared.Writer.OutputSink.Write(Byte[] data, Int32 offset, Int32 length)
2024-12-21 14:08:43.367    [ERROR][21]    Unexpected error writing to OutputSink: System.UnauthorizedAccessException: Access to the path '/mnt/recordings/Blue Beetle (2023)/Blue.Beetle.(2023).ts' is denied.
---> System.IO.IOException: Permission denied
   --- End of inner exception stack trace ---
   at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset)
   at System.IO.Strategies.BufferedFileStreamStrategy.WriteSpan(ReadOnlySpan`1 source, ArraySegment`1 arraySegment)
   at System.IO.Strategies.BufferedFileStreamStrategy.Write(Byte[] buffer, Int32 offset, Int32 count)
   at NShared.Writer.OutputSink.Write(Byte[] data, Int32 offset, Int32 length)

It make no sense to have access for a few seconds and then, having access denied to the path. I'm attaching the whole logs for anybody to look at but I think the cut/paste section above is what is of interest. Note that I can play the .ts (very short but still) and that if I delete it from nextpvr, it remove everything including the directory. 

It may not make sense but is it possible that nextpvr change identity between the initial file creating and for the rest of the append to the .ts file? 

Any idea/suggestion/comment will be appreciated.

Thank you.

ehfortin

[ehfortin]

Hello,

For now, I'm using NFS which work great. Still have no clue why CIFS is acting the way it is and would like to understand what may be the problem but at least I have an alternative which work. I will continue to do some testing around this but at the moment, I have another problem with the IR Blaster. In the last 24 hours, it worked for 3 movies and didn't for another two (was recording just about anything to see if it was reliable). The recordings were made on the same 2-3 channels which show that it's not a problem with some digit. But the receiver never wake up with the "OK/Select" for some of the recording but worked for others. Will do more testing around that.

Thank you.

ehfortin

[mvallevand]

My STB needs a wakeup key after 6 hours, perhaps you need something that.

Martin