From: Ted Ts'o <tytso@mit.edu>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: linux-fsdevel@vger.kernel.org, Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: Some way of telling which block devices are in use (and how)
Date: Sun, 29 Apr 2012 18:05:12 -0400 [thread overview]
Message-ID: <20120429220512.GC7342@thunk.org> (raw)
In-Reply-To: <20120429212305.GB7342@thunk.org>
I've been looking more closely at this, and I think we can make things
better by having the file system create a symlink from partition's
holders directory to the file system's kobject (assuming the file
system has a kobject, which most do not have). i.e., I'd add to
ext4_fill_super() something like this:
ret = add_symlink(bdev->bd_part->holder_dir, &ext4_kset->kobj);
Currently, the holders directory will show links for md and
devicemapper users of the block device. This would add a link if ext4
has the block device mounted.
It's not a complete solution, but I think it would help, and as far as
I can tell, it's in the spirit of how the holders directory was
(partially) implemented.
- Ted
next prev parent reply other threads:[~2012-04-29 22:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-29 18:57 Some way of telling which block devices are in use (and how) Theodore Ts'o
2012-04-29 20:18 ` Greg KH
2012-04-29 21:23 ` Ted Ts'o
2012-04-29 22:05 ` Ted Ts'o [this message]
2012-04-30 5:10 ` Greg KH
2012-04-30 9:11 ` Ted Ts'o
2012-04-30 16:21 ` Greg KH
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