linux-kernel - Re: [patch 3/7] fs, notify: Add file handle entry into inotify_inode

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Message-ID: <20121114101344.GG16685@moon>
Date:	Wed, 14 Nov 2012 14:13:44 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>,
	Alexey Dobriyan <adobriyan@...il.com>,
	James Bottomley <jbottomley@...allels.com>,
	Matthew Helsley <matt.helsley@...il.com>,
	aneesh.kumar@...ux.vnet.ibm.com, bfields@...ldses.org
Subject: Re: [patch 3/7] fs, notify: Add file handle entry into
 inotify_inode_mark

On Wed, Nov 14, 2012 at 02:10:50PM +0400, Pavel Emelyanov wrote:
> >>
> >> How can the c/r restore code reestablish the inode data if the dentry
> >> isn't there any more?
> > 
> > By "deleted" I meant deleted from dcache, thus when we call for
> > open_by_handle_at with fhandle, the kernel reconstruct the path
> > and we simply read the /proc/self/fd/ link, and then pass this
> > path to inotify_add_watch.
> 
> No we don't do readlink as the path we'd see would be empty. Instead after
> we called the open_by_handle_at, we pass the "/proc/self/fd/<fd>" _path_ itself
> to inotify_add_watch. The path resolution code follows the link properly and
> adds the target inode into the watch list.

Yeah, sorry for confusion.
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