* [PULL for 3.18] overlay filesystem v24
@ 2014-09-29 14:14 Miklos Szeredi
2014-09-29 21:45 ` Woody Suwalski
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Miklos Szeredi @ 2014-09-29 14:14 UTC (permalink / raw)
To: Al Viro
Cc: Christoph Hellwig, Linux-Fsdevel, Kernel Mailing List,
Andrew Morton, Linus Torvalds, Stephen Rothwell, linux-unionfs
I'd like to propose overlayfs for inclusion into 3.18.
Al, would you mind giving it a review?
Git tree is here:
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
Thanks,
Miklos
---
Andy Whitcroft (1):
overlayfs: add statfs support
Erez Zadok (1):
overlayfs: implement show_options
Miklos Szeredi (11):
vfs: add i_op->dentry_open()
vfs: export do_splice_direct() to modules
vfs: export __inode_permission() to modules
vfs: introduce clone_private_mount()
vfs: export check_sticky()
vfs: add whiteout support
vfs: add RENAME_WHITEOUT
ext4: support RENAME_WHITEOUT
shmem: support RENAME_WHITEOUT
overlay filesystem
fs: limit filesystem stacking depth
Neil Brown (1):
overlay: overlay filesystem documentation
Sedat Dilek (1):
vfs: dcache: Export d_ancestor to modules
---
Documentation/filesystems/Locking | 2 +
Documentation/filesystems/overlayfs.txt | 198 +++++++
Documentation/filesystems/vfs.txt | 7 +
MAINTAINERS | 7 +
fs/Kconfig | 1 +
fs/Makefile | 1 +
fs/btrfs/ioctl.c | 20 +-
fs/dcache.c | 1 +
fs/ecryptfs/main.c | 7 +
fs/ext4/namei.c | 95 +++-
fs/internal.h | 7 -
fs/namei.c | 41 +-
fs/namespace.c | 27 +
fs/open.c | 23 +-
fs/overlayfs/Kconfig | 10 +
fs/overlayfs/Makefile | 7 +
fs/overlayfs/copy_up.c | 431 +++++++++++++++
fs/overlayfs/dir.c | 914 ++++++++++++++++++++++++++++++++
fs/overlayfs/inode.c | 408 ++++++++++++++
fs/overlayfs/overlayfs.h | 187 +++++++
fs/overlayfs/readdir.c | 518 ++++++++++++++++++
fs/overlayfs/super.c | 762 ++++++++++++++++++++++++++
fs/splice.c | 1 +
include/linux/fs.h | 37 ++
include/linux/mount.h | 3 +
include/uapi/linux/fs.h | 1 +
mm/shmem.c | 36 +-
27 files changed, 3694 insertions(+), 58 deletions(-)
create mode 100644 Documentation/filesystems/overlayfs.txt
create mode 100644 fs/overlayfs/Kconfig
create mode 100644 fs/overlayfs/Makefile
create mode 100644 fs/overlayfs/copy_up.c
create mode 100644 fs/overlayfs/dir.c
create mode 100644 fs/overlayfs/inode.c
create mode 100644 fs/overlayfs/overlayfs.h
create mode 100644 fs/overlayfs/readdir.c
create mode 100644 fs/overlayfs/super.c
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PULL for 3.18] overlay filesystem v24
2014-09-29 14:14 [PULL for 3.18] overlay filesystem v24 Miklos Szeredi
@ 2014-09-29 21:45 ` Woody Suwalski
2014-09-29 22:00 ` David Howells
2014-10-23 11:56 ` Sedat Dilek
2 siblings, 0 replies; 8+ messages in thread
From: Woody Suwalski @ 2014-09-29 21:45 UTC (permalink / raw)
To: Miklos Szeredi, Al Viro
Cc: Christoph Hellwig, Linux-Fsdevel, Kernel Mailing List,
Andrew Morton, Linus Torvalds, Stephen Rothwell, linux-unionfs
I remember like if it was yesterday... ;-)
Around 3.8 Linus decided to include overlayfs in the kernel, so in 3.10
we were supposed to get it... And we keep waiting...
Woody
Miklos Szeredi wrote:
> I'd like to propose overlayfs for inclusion into 3.18.
>
> Al, would you mind giving it a review?
>
> Git tree is here:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
>
> Thanks,
> Miklos
>
> ---
> Andy Whitcroft (1):
> overlayfs: add statfs support
>
> Erez Zadok (1):
> overlayfs: implement show_options
>
> Miklos Szeredi (11):
> vfs: add i_op->dentry_open()
> vfs: export do_splice_direct() to modules
> vfs: export __inode_permission() to modules
> vfs: introduce clone_private_mount()
> vfs: export check_sticky()
> vfs: add whiteout support
> vfs: add RENAME_WHITEOUT
> ext4: support RENAME_WHITEOUT
> shmem: support RENAME_WHITEOUT
> overlay filesystem
> fs: limit filesystem stacking depth
>
> Neil Brown (1):
> overlay: overlay filesystem documentation
>
> Sedat Dilek (1):
> vfs: dcache: Export d_ancestor to modules
>
> ---
> Documentation/filesystems/Locking | 2 +
> Documentation/filesystems/overlayfs.txt | 198 +++++++
> Documentation/filesystems/vfs.txt | 7 +
> MAINTAINERS | 7 +
> fs/Kconfig | 1 +
> fs/Makefile | 1 +
> fs/btrfs/ioctl.c | 20 +-
> fs/dcache.c | 1 +
> fs/ecryptfs/main.c | 7 +
> fs/ext4/namei.c | 95 +++-
> fs/internal.h | 7 -
> fs/namei.c | 41 +-
> fs/namespace.c | 27 +
> fs/open.c | 23 +-
> fs/overlayfs/Kconfig | 10 +
> fs/overlayfs/Makefile | 7 +
> fs/overlayfs/copy_up.c | 431 +++++++++++++++
> fs/overlayfs/dir.c | 914 ++++++++++++++++++++++++++++++++
> fs/overlayfs/inode.c | 408 ++++++++++++++
> fs/overlayfs/overlayfs.h | 187 +++++++
> fs/overlayfs/readdir.c | 518 ++++++++++++++++++
> fs/overlayfs/super.c | 762 ++++++++++++++++++++++++++
> fs/splice.c | 1 +
> include/linux/fs.h | 37 ++
> include/linux/mount.h | 3 +
> include/uapi/linux/fs.h | 1 +
> mm/shmem.c | 36 +-
> 27 files changed, 3694 insertions(+), 58 deletions(-)
> create mode 100644 Documentation/filesystems/overlayfs.txt
> create mode 100644 fs/overlayfs/Kconfig
> create mode 100644 fs/overlayfs/Makefile
> create mode 100644 fs/overlayfs/copy_up.c
> create mode 100644 fs/overlayfs/dir.c
> create mode 100644 fs/overlayfs/inode.c
> create mode 100644 fs/overlayfs/overlayfs.h
> create mode 100644 fs/overlayfs/readdir.c
> create mode 100644 fs/overlayfs/super.c
> --
> 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/
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-09-29 14:14 [PULL for 3.18] overlay filesystem v24 Miklos Szeredi
2014-09-29 21:45 ` Woody Suwalski
@ 2014-09-29 22:00 ` David Howells
2014-09-30 4:54 ` J. R. Okajima
2014-10-23 11:56 ` Sedat Dilek
2 siblings, 1 reply; 8+ messages in thread
From: David Howells @ 2014-09-29 22:00 UTC (permalink / raw)
To: Miklos Szeredi
Cc: dhowells, Al Viro, Christoph Hellwig, Linux-Fsdevel,
Kernel Mailing List, Andrew Morton, Linus Torvalds,
Stephen Rothwell, linux-unionfs
Miklos Szeredi <miklos@szeredi.hu> wrote:
> I'd like to propose overlayfs for inclusion into 3.18.
>
> Al, would you mind giving it a review?
>
> Git tree is here:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
Tested-by: David Howells <dhowells@redhat.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-09-29 22:00 ` David Howells
@ 2014-09-30 4:54 ` J. R. Okajima
2014-09-30 7:31 ` Miklos Szeredi
0 siblings, 1 reply; 8+ messages in thread
From: J. R. Okajima @ 2014-09-30 4:54 UTC (permalink / raw)
To: David Howells
Cc: Miklos Szeredi, Al Viro, Christoph Hellwig, Linux-Fsdevel,
Kernel Mailing List, Andrew Morton, Linus Torvalds,
Stephen Rothwell, linux-unionfs
David Howells:
> Miklos Szeredi <miklos@szeredi.hu> wrote:
>
> > I'd like to propose overlayfs for inclusion into 3.18.
> >
> > Al, would you mind giving it a review?
> >
> > Git tree is here:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
>
> Tested-by: David Howells <dhowells@redhat.com>
Does it mean overlayfs passed all your unionmount-testsuite? And does
the test suite contain tests for "inode-based" union? For example,
- read(2) may get the obsoleted filedata (fstat(2) for metadata too).
- fcntl(F_SETLK) may be broken by copy-up.
- inotify may not work when it refers to the file before being
copied-up.
- unnecessary copy-up may happen, for example mmap(MAP_PRIVATE) after
open(O_RDWR).
- exporting via NFS and fhandle systemcalls will not work.
A few releases ago, OFD file-lock was introduced to improve the
behaviour of POSIX lock. POSIX lock has made users confused and I am
afraid that the similar story will come up because of the "name-based"
union behaviour. Of course the story is not limited to the file-lock.
If I remember correctly, are you the one who consitunes the development
of UnionMount? Is the development totally stopped?
Next paragraph is what I wrote several times.
AUFS is an "inode-based" stackable filesystem and solved them many years
ago. But I have to admit that AUFS is big. Yes it is grown up.
I don't stop including overlayfs into mainline, but if the development
of UnionMount is really stopped, then I'd ask people to consider merging
aufs as well as overlayfs.
http://aufs.sf.net
J. R. Okajima
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-09-30 4:54 ` J. R. Okajima
@ 2014-09-30 7:31 ` Miklos Szeredi
2014-09-30 13:23 ` J. R. Okajima
0 siblings, 1 reply; 8+ messages in thread
From: Miklos Szeredi @ 2014-09-30 7:31 UTC (permalink / raw)
To: J. R. Okajima
Cc: David Howells, Al Viro, Christoph Hellwig, Linux-Fsdevel,
Kernel Mailing List, Andrew Morton, Linus Torvalds,
Stephen Rothwell, linux-unionfs
On Tue, Sep 30, 2014 at 6:54 AM, J. R. Okajima <hooanon05g@gmail.com> wrote:
>
> David Howells:
>> Miklos Szeredi <miklos@szeredi.hu> wrote:
>>
>> > I'd like to propose overlayfs for inclusion into 3.18.
>> >
>> > Al, would you mind giving it a review?
>> >
>> > Git tree is here:
>> >
>> > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
>>
>> Tested-by: David Howells <dhowells@redhat.com>
>
> Does it mean overlayfs passed all your unionmount-testsuite? And does
> the test suite contain tests for "inode-based" union? For example,
> - read(2) may get the obsoleted filedata (fstat(2) for metadata too).
> - fcntl(F_SETLK) may be broken by copy-up.
> - inotify may not work when it refers to the file before being
> copied-up.
> - unnecessary copy-up may happen, for example mmap(MAP_PRIVATE) after
> open(O_RDWR).
> - exporting via NFS and fhandle systemcalls will not work.
Most of this is explicitly documented.
>
> A few releases ago, OFD file-lock was introduced to improve the
> behaviour of POSIX lock. POSIX lock has made users confused and I am
> afraid that the similar story will come up because of the "name-based"
> union behaviour. Of course the story is not limited to the file-lock.
>
> If I remember correctly, are you the one who consitunes the development
> of UnionMount? Is the development totally stopped?
> Next paragraph is what I wrote several times.
> AUFS is an "inode-based" stackable filesystem and solved them many years
> ago. But I have to admit that AUFS is big. Yes it is grown up.
> I don't stop including overlayfs into mainline, but if the development
> of UnionMount is really stopped, then I'd ask people to consider merging
> aufs as well as overlayfs.
Union-mounts are namespace based as well. There's little semantic
difference between overlayfs and union-mounts. The difference is
mostly in the implementation.
It would be good to have an inode based union as well. I suggest (as
I suggested many times) to try slimming aufs to a bare minimum and
submit that. It may be easier to just start from scratch instead
trying to drop features from the existing codebase. I'd be happy to
review and generally help with such an effort.
Thanks,
Miklos
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-09-30 7:31 ` Miklos Szeredi
@ 2014-09-30 13:23 ` J. R. Okajima
0 siblings, 0 replies; 8+ messages in thread
From: J. R. Okajima @ 2014-09-30 13:23 UTC (permalink / raw)
To: Miklos Szeredi
Cc: David Howells, Al Viro, Christoph Hellwig, Linux-Fsdevel,
Kernel Mailing List, Andrew Morton, Linus Torvalds,
Stephen Rothwell, linux-unionfs
Miklos Szeredi:
> It would be good to have an inode based union as well. I suggest (as
> I suggested many times) to try slimming aufs to a bare minimum and
> submit that. It may be easier to just start from scratch instead
> trying to drop features from the existing codebase. I'd be happy to
> review and generally help with such an effort.
??
In 2009, I have posted the "feature-reduced" version of aufs2 as
following your advice. Also a git-branch called "aufs2-tmp-ro" was
created whose size was a half of aufs2's. Have you ever posted your
review comments about them?
It was 2005 when I got an idea of aufs. Its history is almost a decade.
In my current local aufs3 develpment branch, I got about 350
commits. And 680 and 1120 commits for aufs2 and aufs1 individually.
aufs3-linux.git#aufs3.x-rcN/25lktr$ git log1 --no-merges fs/aufs/*.c | wc -l
348
aufs2-2.6.git#aufs2.2-stdalone-38-lktr$ git log1 --no-merges fs/aufs/*.c | wc -l
685
aufs1.git#master$ git log1 --no-merges aufs/fs/aufs/*.c | wc -l
1126
Of cource it won't be 2000 commits to create the patch series you
wrote. I don't know how large the number will be but I am sure this is
incredibly tough work both in commiting and reviewing. Is it still
helpful and really meaningful for you to review? Don't you think it will
be easier to review the resulted code?
For example, this branch was created for linux-3.9 when Al Viro wrote
about the dir mutex lock in copy-up. It has only 20 commits.
aufs3-linux.git#mainline-v3.9-rc8-20130428$ git log1 --no-merges fs/aufs/*.c | wc -l
20
J. R. Okajima
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-09-29 14:14 [PULL for 3.18] overlay filesystem v24 Miklos Szeredi
2014-09-29 21:45 ` Woody Suwalski
2014-09-29 22:00 ` David Howells
@ 2014-10-23 11:56 ` Sedat Dilek
2014-11-25 14:57 ` Miklos Szeredi
2 siblings, 1 reply; 8+ messages in thread
From: Sedat Dilek @ 2014-10-23 11:56 UTC (permalink / raw)
To: Miklos Szeredi
Cc: Al Viro, Christoph Hellwig, Linux-Fsdevel, Kernel Mailing List,
Andrew Morton, Linus Torvalds, Stephen Rothwell, linux-unionfs
On Mon, Sep 29, 2014 at 4:14 PM, Miklos Szeredi <miklos@szeredi.hu> wrote:
> I'd like to propose overlayfs for inclusion into 3.18.
>
> Al, would you mind giving it a review?
>
> Git tree is here:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.current
>
Nice to see that the overlayfs "dream" comes true.
overlayfs.current has now got a "review" - will there be a v25
pull-request soonish or is overlayfs.current still in WIP?
Where is that review process happening? On linux-fsdevel I could not
find any informations.
Some updated patches have no review credits - for example the big
overlay filesystem patch which mentions AV's review, etc.
Maintainers file could have a tree item pointing to your personal Git
repository.
Is the documentation up2date?
Some files below fs/overlayfs/ have copyright pointing to year 2011 by
Novell - needs an update?
Thought about a co-maintainer?
Docs could have a pointer to the testsuite by David Howells [1]?
...etc.
- Sedat -
[1] http://git.infradead.org/users/dhowells/unionmount-testsuite.git
> Thanks,
> Miklos
>
> ---
> Andy Whitcroft (1):
> overlayfs: add statfs support
>
> Erez Zadok (1):
> overlayfs: implement show_options
>
> Miklos Szeredi (11):
> vfs: add i_op->dentry_open()
> vfs: export do_splice_direct() to modules
> vfs: export __inode_permission() to modules
> vfs: introduce clone_private_mount()
> vfs: export check_sticky()
> vfs: add whiteout support
> vfs: add RENAME_WHITEOUT
> ext4: support RENAME_WHITEOUT
> shmem: support RENAME_WHITEOUT
> overlay filesystem
> fs: limit filesystem stacking depth
>
> Neil Brown (1):
> overlay: overlay filesystem documentation
>
> Sedat Dilek (1):
> vfs: dcache: Export d_ancestor to modules
>
> ---
> Documentation/filesystems/Locking | 2 +
> Documentation/filesystems/overlayfs.txt | 198 +++++++
> Documentation/filesystems/vfs.txt | 7 +
> MAINTAINERS | 7 +
> fs/Kconfig | 1 +
> fs/Makefile | 1 +
> fs/btrfs/ioctl.c | 20 +-
> fs/dcache.c | 1 +
> fs/ecryptfs/main.c | 7 +
> fs/ext4/namei.c | 95 +++-
> fs/internal.h | 7 -
> fs/namei.c | 41 +-
> fs/namespace.c | 27 +
> fs/open.c | 23 +-
> fs/overlayfs/Kconfig | 10 +
> fs/overlayfs/Makefile | 7 +
> fs/overlayfs/copy_up.c | 431 +++++++++++++++
> fs/overlayfs/dir.c | 914 ++++++++++++++++++++++++++++++++
> fs/overlayfs/inode.c | 408 ++++++++++++++
> fs/overlayfs/overlayfs.h | 187 +++++++
> fs/overlayfs/readdir.c | 518 ++++++++++++++++++
> fs/overlayfs/super.c | 762 ++++++++++++++++++++++++++
> fs/splice.c | 1 +
> include/linux/fs.h | 37 ++
> include/linux/mount.h | 3 +
> include/uapi/linux/fs.h | 1 +
> mm/shmem.c | 36 +-
> 27 files changed, 3694 insertions(+), 58 deletions(-)
> create mode 100644 Documentation/filesystems/overlayfs.txt
> create mode 100644 fs/overlayfs/Kconfig
> create mode 100644 fs/overlayfs/Makefile
> create mode 100644 fs/overlayfs/copy_up.c
> create mode 100644 fs/overlayfs/dir.c
> create mode 100644 fs/overlayfs/inode.c
> create mode 100644 fs/overlayfs/overlayfs.h
> create mode 100644 fs/overlayfs/readdir.c
> create mode 100644 fs/overlayfs/super.c
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PULL for 3.18] overlay filesystem v24
2014-10-23 11:56 ` Sedat Dilek
@ 2014-11-25 14:57 ` Miklos Szeredi
0 siblings, 0 replies; 8+ messages in thread
From: Miklos Szeredi @ 2014-11-25 14:57 UTC (permalink / raw)
To: Sedat Dilek
Cc: Al Viro, Christoph Hellwig, Linux-Fsdevel, Kernel Mailing List,
Andrew Morton, Linus Torvalds, Stephen Rothwell, linux-unionfs
On Thu, Oct 23, 2014 at 1:56 PM, Sedat Dilek <sedat.dilek@gmail.com> wrote:
> Is the documentation up2date?
Should be. If you find any issues, please let me know (patch is also welcome).
> Some files below fs/overlayfs/ have copyright pointing to year 2011 by
> Novell - needs an update?
Not even sure who's my employer at the moment ;)
> Thought about a co-maintainer?
No.
> Docs could have a pointer to the testsuite by David Howells [1]?
Sure, that's a good idea. Patch queued.
Thanks,
Miklos
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2014-11-25 14:57 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2014-09-29 14:14 [PULL for 3.18] overlay filesystem v24 Miklos Szeredi
2014-09-29 21:45 ` Woody Suwalski
2014-09-29 22:00 ` David Howells
2014-09-30 4:54 ` J. R. Okajima
2014-09-30 7:31 ` Miklos Szeredi
2014-09-30 13:23 ` J. R. Okajima
2014-10-23 11:56 ` Sedat Dilek
2014-11-25 14:57 ` Miklos Szeredi
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