lkml.org 
[lkml]   [2007]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: How to register block device as read-only

On Jul 28 2007 13:36, Bernd Petrovitsch wrote:
>
>Unless I misunderstand the question, the "write" and "writev" function
>of the "struct file_operations" should return an appropriate error value
>(which is here -EACCES).
>You may think of returning an error in the "open" if someone wants to
>open it to write to it (so that the must open it read-only).
>But I don't know if that is common practice or not (or even disliked) as
>it may interfere with not properly implemented tools which open devices
>read-write even if they never write to it.

Yes it is, I believe. When mount(8) gets an error from mount(2),
it retries with MS_RDONLY enabled.


Jan
--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-07-28 13:47    [W:0.030 / U:0.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site