linux-cifs.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christian Brauner <brauner@kernel.org>
To: Steve French <stfrench@microsoft.com>,
	Christoph Hellwig <hch@infradead.org>,
	Namjae Jeon <namjae.jeon@samsung.com>,
	linux-cifs@vger.kernel.org
Cc: Hyunchul Lee <hyc.lee@gmail.com>,
	Sergey Senozhatsky <senozhatsky@chromium.org>,
	Christian Brauner <christian.brauner@ubuntu.com>
Subject: [PATCH 00/11] ksmbd: various fixes
Date: Mon, 23 Aug 2021 17:13:46 +0200	[thread overview]
Message-ID: <20210823151357.471691-1-brauner@kernel.org> (raw)
In-Reply-To: <20210823025816.7496-1-namjae.jeon@samsung.com>

From: Christian Brauner <christian.brauner@ubuntu.com>

Hey everyone,

I took the time to look at ksmbd last week and today. I performed
various tests, read a bunch of code and discovered a few bugs that I
addressed in this series. Most of them simply deal with the translation
of ownership between samba ids and unix ids.

The server client model makes it a bit harder to reason about things but
in essence ksmbd behaves like a very simple shim sitting on top of the
underlying filesystem and thus bares some _vague_ resemblance to
overlayfs and other overlay-style filesystems. The crucial thing is that
ksmbd calls into the lower filesystem to create and manage filesystem
objects. This is inherently a tricky thing to get right as it
essentially involves two-level thinking all of the time. The easiest
conceptual model I came up with for me is that ksmbd is similar to a
userspace process that calls into the filesystem. With this model in
mind it becomes a lot clearer how ownership needs to be managed. I tried
to reflect that thinking in the commit message explaining why what
happens.

Thanks!
Christian

Christian Brauner (11):
  ksmbd: fix lookup on idmapped mounts
  ksmbd: fix translation in smb2_populate_readdir_entry()
  ksmbd: fix translation in create_posix_rsp_buf()
  smb2pdu: fix translation in ksmbd_acls_fattr()
  ksmbd: fix translation in acl entries
  ksmbd: fix subauth 0 handling in sid_to_id()
  ksmbd: fix translation in sid_to_id()
  ndr: fix translation in ndr_encode_posix_acl()
  ksmbd: ensure error is surfaced in set_file_basic_info()
  ksmbd: remove setattr preparations in set_file_basic_info()
  ksmbd: defer notify_change() call

 fs/ksmbd/ndr.c        |  4 +--
 fs/ksmbd/oplock.c     |  6 ++--
 fs/ksmbd/smb2pdu.c    | 43 +++++++++++++--------------
 fs/ksmbd/smb_common.c |  4 +--
 fs/ksmbd/smb_common.h |  1 -
 fs/ksmbd/smbacl.c     | 69 +++++++++++++++++++++++++++----------------
 fs/ksmbd/smbacl.h     | 25 ++++++++++++++++
 fs/ksmbd/vfs.c        | 47 ++++++++++++++++-------------
 fs/ksmbd/vfs.h        |  3 +-
 9 files changed, 125 insertions(+), 77 deletions(-)


base-commit: 0bffa153a2f46dcbced4a48167e91522d8aabe58
-- 
2.30.2


  parent reply	other threads:[~2021-08-23 15:14 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20210823030840epcas1p24b226d445a683012925efd81a72ecb6d@epcas1p2.samsung.com>
2021-08-23  2:58 ` [PATCH v8 00/13] ksmbd: introduce new SMB3 kernel server Namjae Jeon
     [not found]   ` <CGME20210823030841epcas1p1a811d4a6aec75c09581a9b0fb575d23e@epcas1p1.samsung.com>
2021-08-23  2:58     ` [PATCH v8 01/13] ksmbd: add document Namjae Jeon
     [not found]   ` <CGME20210823030842epcas1p27cdeb782776f6659826110cd9a3524d4@epcas1p2.samsung.com>
2021-08-23  2:58     ` [PATCH v8 02/13] ksmbd: add server handler Namjae Jeon
     [not found]   ` <CGME20210823030843epcas1p4502dad130066a74f08745c849b981112@epcas1p4.samsung.com>
2021-08-23  2:58     ` [PATCH v8 03/13] ksmbd: add tcp transport layer Namjae Jeon
     [not found]   ` <CGME20210823030844epcas1p2a9dc2c02d32df86e9eb3c2af975c7d81@epcas1p2.samsung.com>
2021-08-23  2:58     ` [PATCH v8 04/13] ksmbd: add ipc " Namjae Jeon
     [not found]   ` <CGME20210823030845epcas1p3ff50078868ed215c43898356c9248d24@epcas1p3.samsung.com>
2021-08-23  2:58     ` [PATCH v8 05/13] ksmbd: add rdma " Namjae Jeon
     [not found]   ` <CGME20210823030845epcas1p2c72588cd470ca46463fd46b42b7b9603@epcas1p2.samsung.com>
2021-08-23  2:58     ` [PATCH v8 06/13] ksmbd: add a utility code that tracks (and caches) sessions data Namjae Jeon
     [not found]   ` <CGME20210823030846epcas1p35bd3c665d8afd6205c617840e709afc7@epcas1p3.samsung.com>
2021-08-23  2:58     ` [PATCH v8 07/13] ksmbd: add authentication Namjae Jeon
     [not found]   ` <CGME20210823030849epcas1p39035b8f9ec5cdc87dc7beca86590932c@epcas1p3.samsung.com>
2021-08-23  2:58     ` [PATCH v8 10/13] ksmbd: add oplock/lease cache mechanism Namjae Jeon
     [not found]   ` <CGME20210823030850epcas1p1eea7803d1ca2e854a0199f4c83cd8190@epcas1p1.samsung.com>
2021-08-23  2:58     ` [PATCH v8 11/13] ksmbd: add file operations Namjae Jeon
     [not found]   ` <CGME20210823030851epcas1p2d141386b64cd9039121a9f6a5074a362@epcas1p2.samsung.com>
2021-08-23  2:58     ` [PATCH v8 12/13] ksmbd: add Kconfig and Makefile Namjae Jeon
     [not found]   ` <CGME20210823030851epcas1p3df6319948e331e2e0225adba4e81e660@epcas1p3.samsung.com>
2021-08-23  2:58     ` [PATCH v8 13/13] MAINTAINERS: add ksmbd kernel server Namjae Jeon
2021-08-23 15:13   ` Christian Brauner [this message]
2021-08-23 15:13     ` [PATCH 01/11] ksmbd: fix lookup on idmapped mounts Christian Brauner
2021-08-23 15:13     ` [PATCH 02/11] ksmbd: fix translation in smb2_populate_readdir_entry() Christian Brauner
2021-08-23 15:13     ` [PATCH 03/11] ksmbd: fix translation in create_posix_rsp_buf() Christian Brauner
2021-08-23 15:13     ` [PATCH 04/11] smb2pdu: fix translation in ksmbd_acls_fattr() Christian Brauner
2021-08-23 15:13     ` [PATCH 05/11] ksmbd: fix translation in acl entries Christian Brauner
2021-08-23 15:13     ` [PATCH 06/11] ksmbd: fix subauth 0 handling in sid_to_id() Christian Brauner
2021-08-24  8:13       ` Namjae Jeon
2021-08-24 11:37         ` Christian Brauner
2021-08-23 15:13     ` [PATCH 07/11] ksmbd: fix translation " Christian Brauner
2021-08-23 15:13     ` [PATCH 08/11] ndr: fix translation in ndr_encode_posix_acl() Christian Brauner
2021-08-23 15:13     ` [PATCH 09/11] ksmbd: ensure error is surfaced in set_file_basic_info() Christian Brauner
2021-08-23 15:13     ` [PATCH 10/11] ksmbd: remove setattr preparations " Christian Brauner
2021-09-01 12:47       ` Namjae Jeon
2021-09-02 13:43         ` Christian Brauner
2021-10-01 18:51       ` Marios Makassikis
2021-10-02  0:41         ` Namjae Jeon
2021-10-02 19:29           ` Marios Makassikis
2021-10-03  0:12             ` Namjae Jeon
2021-08-23 15:13     ` [PATCH 11/11] ksmbd: defer notify_change() call Christian Brauner
2021-08-24  8:20       ` Namjae Jeon
2021-08-24 11:36         ` Christian Brauner
2021-09-01 12:53       ` Namjae Jeon
2021-09-02 13:42         ` Christian Brauner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210823151357.471691-1-brauner@kernel.org \
    --to=brauner@kernel.org \
    --cc=christian.brauner@ubuntu.com \
    --cc=hch@infradead.org \
    --cc=hyc.lee@gmail.com \
    --cc=linux-cifs@vger.kernel.org \
    --cc=namjae.jeon@samsung.com \
    --cc=senozhatsky@chromium.org \
    --cc=stfrench@microsoft.com \
    --subject='Re: [PATCH 00/11] ksmbd: various fixes' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).