From: "J. Bruce Fields" <bfields@fieldses.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: hch@infradead.org, viro@zeniv.linux.org.uk, adilger@sun.com,
corbet@lwn.net, neilb@suse.de, npiggin@kernel.dk,
hooanon05@yahoo.co.jp, miklos@szeredi.hu,
linux-fsdevel@vger.kernel.org, sfrench@us.ibm.com,
philippe.deniel@CEA.FR, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -V21 00/12] Generic name to handle and open by handle syscalls
Date: Mon, 11 Oct 2010 19:34:43 -0400 [thread overview]
Message-ID: <20101011233443.GB16442@fieldses.org> (raw)
In-Reply-To: <1286274140-26533-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Tue, Oct 05, 2010 at 03:52:08PM +0530, Aneesh Kumar K.V wrote:
> Hi,
>
> The below set of patches implement open by handle support using exportfs
> operations. This allows user space application to map a file name to file
> handle and later open the file using handle. This should be usable
> for userspace NFS [1] and 9P server [2]. XFS already support this with the ioctls
> XFS_IOC_PATH_TO_HANDLE and XFS_IOC_OPEN_BY_HANDLE.
>
> [1] http://nfs-ganesha.sourceforge.net/
> [2] http://thread.gmane.org/gmane.comp.emulators.qemu/68992
>
> git repo for the patchset at:
> git://git.kernel.org/pub/scm/linux/kernel/git/kvaneesh/linux-open-handle.git open-by-handle
>
> Test case can be found at
> http://git.kernel.org/?p=fs/ext2/kvaneesh/handle-test.git
> git://git.kernel.org/pub/scm/fs/ext2/kvaneesh/handle-test.git
>
> Changes from V20:
> a) Use better variable names
> b) change handle_size type to __u32
> c) max handle size is now nfsv4 handle size. Considering file system would
> want to support a handle that can fit into nfsv4 handle size limiting
> max handle size to 128 rather than 4096 is the right thing.
Looks OK to me.
I haven't read the later patches carefully, but in general an interface
like this seems to me a useful thing to have.
--b.
> d) I didn't add Ceph changes in the series. I am expecting the changes
> will go via Ceph tree.
>
> -aneesh
>
next prev parent reply other threads:[~2010-10-11 23:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-05 10:22 Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 01/12] exportfs: Return the minimum required handle size Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 02/12] vfs: Add name to file handle conversion support Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 03/12] vfs: Add open by file handle support Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 04/12] vfs: Add handle based readlink syscall Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 05/12] vfs: Add handle based stat syscall Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 06/12] vfs: Add handle based link syscall Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 07/12] x86: Add new syscalls for x86_32 Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 08/12] x86: Add new syscalls for x86_64 Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 09/12] unistd.h: Add new syscalls numbers to asm-generic Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 10/12] vfs: Export file system uuid via /proc/<pid>/mountinfo Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 11/12] ext3: Copy fs UUID to superblock Aneesh Kumar K.V
2010-10-05 10:22 ` [PATCH -V21 12/12] ext4: " Aneesh Kumar K.V
2010-10-11 23:34 ` J. Bruce Fields [this message]
2010-10-24 15:03 ` [PATCH -V21 00/12] Generic name to handle and open by handle syscalls Aneesh Kumar K. V
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