cgroup: start switching to fs_context

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Unfortunately, cgroup is tangled into kernfs infrastructure.
To avoid converting all kernfs-based filesystems at once,
we need to untangle the remount part of things, instead of
having it go through kernfs_sop_remount_fs().  Fortunately,
it's not hard to do.

This commit just gets cgroup/cgroup1 to use fs_context to
deliver options on mount and remount paths.  Parsing those
is going to be done in the next commits; for now we do
pretty much what legacy case does.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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This commit is contained in:

Al Viro 2019-01-05 00:38:03 -05:00

parent 935c6912b1

commit 90129625d9

3 changed files with 116 additions and 41 deletions

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14

kernel/cgroup/cgroup-internal.h

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9

kernel/cgroup/cgroup-v1.c

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134

kernel/cgroup/cgroup.c

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