linux-kernel - [PATCH v2 00/13] staging:lustre: split kernel comm between user and kernel

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Date:	Wed, 23 Dec 2015 16:24:39 -0500
From:	James Simmons <jsimmons@...radead.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	lustre-devel@...ts.lustre.org,
	James Simmons <jsimmons@...radead.org>
Subject: [PATCH v2 00/13] staging:lustre: split kernel comm between user and kernel

The kernel communication code used for HSM and changelog is
entangled. Move the user space bits into the liblustreapi. This will
also help for a possible relicensing. The kernel portion is also moved
from libcfs to obdclass.

The original libcfs_kernelcomm.h header is split into three parts:

  * lustre_kernelcomm.h, a new header for the kernel parts;
  * uapi_kernelcomm.h, a new header for the data structures shared
    between userspace and kernelspace;
  * lustreapi_internal.h receives the private liblustreapi prototypes.

The original code in kernel_user_comm.c is split into two parts:

  * obdclass/kernelcomm.c for the kernel part. filp_user_write() was
    moved there, and linux-fs.c deleted;
  * liblustreapi_kernelconn.c for the user part. The calls to CDEBUG
    have been removed, and calls to CERROR have been transformed to
    llapi_err_noerrno. The type lustre_kernelcomm has been removed and
    replace by struct lustre_kernelcomm.

Various names and filenames have been harmonized to *kernelcomm*.

The unused symbol KUC_FL_BLOCK has been removed.

Signed-off-by: frank zago <fzago at cray.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6245
Reviewed-on: http://review.whamcloud.com/14270
Reviewed-by: Nathan Rutman <nathan.rutman at seagate.com>
Reviewed-by: James Simmons <uja.ornl at yahoo.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin at intel.com>
Reviewed-by: John L. Hammond <john.hammond at intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin at intel.com>

Henri Doreau (1):
  staging: lustre: Prevent duplicate CT registrations

Hongchao Zhang (1):
  staging: lustre: embed kr_data into kkuc_reg

James Simmons (9):
  staging: lustre: kg_sem semaphore handling is incorrectly
  staging: lustre: convert kernelcomm group to unsigned int
  staging: lustre: remove unnecessary NULL checks in kernel_comm.c
  staging: lustre: cleanup block comment style in kernel_comm code
  staging: lustre: add space around '+' in kernel_comm code
  staging: lustre: use proper braces in libcfs_kkuc_group_put
  staging: lustre: return proper error code for libcfs_kkuc_msg_put
  staging: lustre: fix all conditional comparison to zero for
    kernelcomm.c
  staging: lustre: cleanup white space in kernel comm code

frank zago (2):
  staging: lustre: move kernel_user_comm.c from libcfs to lustre
  staging: lustre: split kernel comm between user and kernel

 .../staging/lustre/include/linux/libcfs/libcfs.h   |    1 -
 .../staging/lustre/lustre/include/lustre_export.h  |    7 ++
 .../lustre/lustre/include/lustre_kernelcomm.h      |   55 +++++++++++++
 .../include/uapi_kernelcomm.h}                     |   72 ++++++------------
 drivers/staging/lustre/lustre/libcfs/Makefile      |    5 +-
 drivers/staging/lustre/lustre/llite/dir.c          |    1 +
 drivers/staging/lustre/lustre/lmv/lmv_obd.c        |   30 +++++--
 drivers/staging/lustre/lustre/mdc/mdc_request.c    |   21 ++++--
 drivers/staging/lustre/lustre/obdclass/Makefile    |   10 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    |    1 +
 .../kernel_user_comm.c => obdclass/kernelcomm.c}   |   80 ++++++++++---------
 11 files changed, 172 insertions(+), 111 deletions(-)
 create mode 100644 drivers/staging/lustre/lustre/include/lustre_kernelcomm.h
 rename drivers/staging/lustre/{include/linux/libcfs/libcfs_kernelcomm.h => lustre/include/uapi_kernelcomm.h} (51%)
 rename drivers/staging/lustre/lustre/{libcfs/kernel_user_comm.c => obdclass/kernelcomm.c} (81%)

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