[PATCHSET v2 driver-core-next] kernfs: prepare for cgroup's kernfs conversion

[Tejun Heo]

Hello,

This patchset makes various updates in preparation of cgroup's kernfs
conversion.  Changes from the last take[L] are

* Refreshed on top of v3.14-rc1.

* 0010-kernfs-add-CONFIG_KERNFS.patch added.

This patchset contains the following 10 patches.

 0001-kernfs-invoke-dir_ops-while-holding-active-ref-of-th.patch
 0002-kernfs-rename-kernfs_dir_ops-to-kernfs_syscall_ops.patch
 0003-kernfs-implement-kernfs_syscall_ops-remount_fs-and-s.patch
 0004-kernfs-add-missing-kernfs_active-checks-in-directory.patch
 0005-kernfs-allow-nodes-to-be-created-in-the-deactivated-.patch
 0006-kernfs-implement-kernfs_ops-atomic_write_len.patch
 0007-kernfs-add-kernfs_open_file-priv.patch
 0008-kernfs-implement-kernfs_node_from_dentry-kernfs_root.patch
 0009-kernfs-implement-kernfs_get_parent-kernfs_name-path-.patch
 0010-kernfs-add-CONFIG_KERNFS.patch

 0001-0003 update kernfs_dir_ops for active ref protection, add
 additional syscall operations and rename the struct to
 kernfs_syscall_ops.

 0004-0005 implement an option to create new kernfs_nodes in
 deactivated state so that multiple nodes can be made visible
 atomically or removed without ever being visible to userland.

 0006 implements kernfs_ops->atomic_write_len which will be used to
 support cgroup cftype->max_write_len.

 0007 adds kernfs_open_file->priv.

 0008-0009 add various helpers and accessors.

 0010 adds CONFIG_KERNFS so that kernfs can be selected independently
 from sysfs.

This patchset is on top of

  v3.14-rc1 38dbfb59d117
+ [1] [PATCHSET v5 driver-core-next] kernfs, sysfs, driver-core: implement synchronous self-removal

diffstat follows.

 fs/Kconfig             |    1 
 fs/Makefile            |    3 
 fs/kernfs/Kconfig      |    7 +
 fs/kernfs/dir.c        |  325 ++++++++++++++++++++++++++++++++++++++++++++-----
 fs/kernfs/file.c       |   49 ++++---
 fs/kernfs/mount.c      |   37 +++++
 fs/sysfs/Kconfig       |    1 
 fs/sysfs/dir.c         |   44 +-----
 fs/sysfs/mount.c       |    2 
 include/linux/kernfs.h |   90 +++++++++++--
 10 files changed, 460 insertions(+), 99 deletions(-)

Thanks!

--
tejun

[L] http://lkml.kernel.org/g/1390951971-15671-1-git-send-email-tj@xxxxxxxxxx
[1] http://lkml.kernel.org/g/1391454185-32143-1-git-send-email-tj@xxxxxxxxxx
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