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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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7e47682ea5
Add a new cgroup subsystem callback can_fork that conditionally states whether or not the fork is accepted or rejected by a cgroup policy. In addition, add a cancel_fork callback so that if an error occurs later in the forking process, any state modified by can_fork can be reverted. Allow for a private opaque pointer to be passed from cgroup_can_fork to cgroup_post_fork, allowing for the fork state to be stored by each subsystem separately. Also add a tagging system for cgroup_subsys.h to allow for CGROUP_<TAG> enumerations to be be defined and used. In addition, explicitly add a CGROUP_CANFORK_COUNT macro to make arrays easier to define. This is in preparation for implementing the pids cgroup subsystem. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> Signed-off-by: Tejun Heo <tj@kernel.org>
82 lines
1.3 KiB
C
82 lines
1.3 KiB
C
/*
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* List of cgroup subsystems.
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*
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* DO NOT ADD ANY SUBSYSTEM WITHOUT EXPLICIT ACKS FROM CGROUP MAINTAINERS.
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*/
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/*
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* This file *must* be included with SUBSYS() defined.
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* SUBSYS_TAG() is a noop if undefined.
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*/
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#ifndef SUBSYS_TAG
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#define __TMP_SUBSYS_TAG
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#define SUBSYS_TAG(_x)
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#endif
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#if IS_ENABLED(CONFIG_CPUSETS)
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SUBSYS(cpuset)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_SCHED)
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SUBSYS(cpu)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_CPUACCT)
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SUBSYS(cpuacct)
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#endif
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#if IS_ENABLED(CONFIG_BLK_CGROUP)
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SUBSYS(blkio)
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#endif
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#if IS_ENABLED(CONFIG_MEMCG)
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SUBSYS(memory)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_DEVICE)
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SUBSYS(devices)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_FREEZER)
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SUBSYS(freezer)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_NET_CLASSID)
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SUBSYS(net_cls)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_PERF)
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SUBSYS(perf_event)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
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SUBSYS(net_prio)
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#endif
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#if IS_ENABLED(CONFIG_CGROUP_HUGETLB)
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SUBSYS(hugetlb)
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#endif
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/*
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* Subsystems that implement the can_fork() family of callbacks.
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*/
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SUBSYS_TAG(CANFORK_START)
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SUBSYS_TAG(CANFORK_END)
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/*
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* The following subsystems are not supported on the default hierarchy.
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*/
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#if IS_ENABLED(CONFIG_CGROUP_DEBUG)
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SUBSYS(debug)
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#endif
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#ifdef __TMP_SUBSYS_TAG
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#undef __TMP_SUBSYS_TAG
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#undef SUBSYS_TAG
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#endif
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/*
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* DO NOT ADD ANY SUBSYSTEM WITHOUT EXPLICIT ACKS FROM CGROUP MAINTAINERS.
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*/
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