I/O errors on NFS disk: need to make the error messages more detailed

When qBittorrent runs on NFS mounted disk, it periodically pauses torrents with 
the message:

An I/O error occurred, 'XXX' paused
Reason: XXXX file (/file/path) error: Permission denied
This user does have the right to read/write this file. The blocking event is 
rare, maybe ~once a day.

I suggest you should make the error message more information. Error log should 
say which exact system call failed with that error message. It is certainly not 
read/write. It might have been file locking, or some other rare operation. So 
exact system call is important.

This happens with both NFS v4 and NFS v3.

If qBittorrent gave more information in the log, I could have troubleshooted 
this myself, and could have much better idea where to ask and what to do.

v3.1.12

Reposted from https://github.com/qbittorrent/qBittorrent/issues/2933

Original issue reported on code.google.com by yuriv...@gmail.com on 3 May 2015 at 7:03

caisan / libtorrent

I/O errors on NFS disk: need to make the error messages more detailed #741