linux-kernel - Re: [GIT PULL] notification tree

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Date:	Thu, 19 Aug 2010 23:07:31 +0200
From:	Andreas Gruenbacher <agruen@...e.de>
To:	Eric Paris <eparis@...hat.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Matt Helsley <matthltc@...ibm.com>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, akpm@...ux-foundation.org,
	Michael Kerrisk <michael.kerrisk@...il.com>
Subject: Re: [GIT PULL] notification tree - try 37!

On Thursday 19 August 2010 22:42:45 Eric Paris wrote:
> The extra events are plainly the new events that inotify doesn't
> support: namely permissions events.  You ask for and received extra
> events....

How can it make sense that inotify suddenly starts seeing events it does not
support?

> I can't reproduce it. You must have some other testing methodology.....

Apparently.  Here is a trace if what I'm getting through inotify (the inotify
events were dumped with gdb, the rest is from strace):

inotify_init()                          = 3
inotify_add_watch(3, "d", IN_ACCESS|IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_CLOSE_NOWRITE|IN_OPEN|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|
IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF) = 1
read(3, "\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0 \0\0@\0\0\0\0\0\0\0\0", 4210688) = 32

	=> {wd = 1, mask = 0, cookie = 0, len = 0, name = ...}
	=> {wd = 1, mask = 1073741856, cookie = 0, len = 0, name = ...}

read(3, "\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\20\0\0@\0\0\0\0\0\0\0\0", 4210688) = 32

	=> {wd = 1, mask = 0, cookie = 0, len = 0, name = ...}
	=> {wd = 1, mask = 1073741840, cookie = 0, len = 0, name = ...}

read(3, 0x7fff56db15e0, 4210688)        = -1 EINTR (Interrupted system call)


Andreas
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