[PATCHSET cgroup/for-3.16] cgroup: implement cftype->write()

Tejun Heo
2014-05-06T12:44:35Z

Hello,

This patchset implements a new cftype operation ->write() and replace
->write_string() and ->trigger() with it. ->write() is similar to
->write_string() but maps directly to the kernfs write operation and
has access to all available context information including the
associated kernfs_open_file, which will make things like implementing
kernfs active protection manipulation easier.

->write_string() becomes redundant and ->trigger() has always been
spurious. This patch replaces all users of the two methods to
->write() and remove them.

This patchset contains the following five patches.

0001-cgroup-implement-cftype-write.patch
0002-cgroup-replace-cftype-write_string-with-cftype-write.patch
0003-cgroup-replace-cftype-trigger-with-cftype-write.patch
0004-cgroup-convert-tasks-and-cgroup.procs-handle-to-use-.patch
0005-cgroup-remove-cgroup-control_kn.patch

0001 implements cftype->write().

0002-0003 replace cftype->write_string() and ->trigger() with it.

0004 convert "tasks" and "cgroup.procs" handler too.

0005 removes cgroup->control_kn as the kernfs_node is now directly
accessible from kernfs_open_file.

This patchset is on top of

cgroup/for-3.16 12d3089c192c ("kernel/cpuset.c: convert printk to pr_foo()")
+ [1] [PATCHSET cgroup/for-3.16] cgroup: post unified hierarchy fixes and updates

and available on the following git branch.

git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-post-unified-updates

diffstat follows.

block/blk-throttle.c | 32 ++++++++---------
block/cfq-iosched.c | 28 +++++++--------
include/linux/cgroup.h | 40 +++++++++++----------
kernel/cgroup.c | 85 +++++++++++++++++++++++-----------------------
kernel/cgroup_freezer.c | 20 ++++------
kernel/cpuset.c | 16 ++++----
mm/hugetlb_cgroup.c | 33 +++++++++--------
mm/memcontrol.c | 80 +++++++++++++++++++++++--------------------
net/ipv4/tcp_memcontrol.c | 31 +++++++++-------
security/device_cgroup.c | 14 +++----
10 files changed, 197 insertions(+), 182 deletions(-)

Thanks.

--
tejun

[1] http://lkml.kernel.org/g/1399377044-29873-1-git-send-email-tj@kernel.org