src/core/cgroup.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdbool.h>
  23
  24 #include "list.h"
  25 #include "time-util.h"
  26 #include "cgroup-util.h"
  27
  28 typedef struct CGroupContext CGroupContext;
  29 typedef struct CGroupDeviceAllow CGroupDeviceAllow;
  30 typedef struct CGroupIODeviceWeight CGroupIODeviceWeight;
  31 typedef struct CGroupIODeviceLimit CGroupIODeviceLimit;
  32 typedef struct CGroupBlockIODeviceWeight CGroupBlockIODeviceWeight;
  33 typedef struct CGroupBlockIODeviceBandwidth CGroupBlockIODeviceBandwidth;
  34
  35 typedef enum CGroupDevicePolicy {
  36
  37         /* When devices listed, will allow those, plus built-in ones,
  38         if none are listed will allow everything. */
  39         CGROUP_AUTO,
  40
  41         /* Everything forbidden, except built-in ones and listed ones. */
  42         CGROUP_CLOSED,
  43
  44         /* Everythings forbidden, except for the listed devices */
  45         CGROUP_STRICT,
  46
  47         _CGROUP_DEVICE_POLICY_MAX,
  48         _CGROUP_DEVICE_POLICY_INVALID = -1
  49 } CGroupDevicePolicy;
  50
  51 struct CGroupDeviceAllow {
  52         LIST_FIELDS(CGroupDeviceAllow, device_allow);
  53         char *path;
  54         bool r:1;
  55         bool w:1;
  56         bool m:1;
  57 };
  58
  59 struct CGroupIODeviceWeight {
  60         LIST_FIELDS(CGroupIODeviceWeight, device_weights);
  61         char *path;
  62         uint64_t weight;
  63 };
  64
  65 struct CGroupIODeviceLimit {
  66         LIST_FIELDS(CGroupIODeviceLimit, device_limits);
  67         char *path;
  68         uint64_t limits[_CGROUP_IO_LIMIT_TYPE_MAX];
  69 };
  70
  71 struct CGroupBlockIODeviceWeight {
  72         LIST_FIELDS(CGroupBlockIODeviceWeight, device_weights);
  73         char *path;
  74         uint64_t weight;
  75 };
  76
  77 struct CGroupBlockIODeviceBandwidth {
  78         LIST_FIELDS(CGroupBlockIODeviceBandwidth, device_bandwidths);
  79         char *path;
  80         uint64_t rbps;
  81         uint64_t wbps;
  82 };
  83
  84 struct CGroupContext {
  85         bool cpu_accounting;
  86         bool io_accounting;
  87         bool blockio_accounting;
  88         bool memory_accounting;
  89         bool tasks_accounting;
  90
  91         /* For unified hierarchy */
  92         uint64_t cpu_weight;
  93         uint64_t startup_cpu_weight;
  94         usec_t cpu_quota_per_sec_usec;
  95
  96         uint64_t io_weight;
  97         uint64_t startup_io_weight;
  98         LIST_HEAD(CGroupIODeviceWeight, io_device_weights);
  99         LIST_HEAD(CGroupIODeviceLimit, io_device_limits);
 100
 101         uint64_t memory_low;
 102         uint64_t memory_high;
 103         uint64_t memory_max;
 104         uint64_t memory_swap_max;
 105
 106         /* For legacy hierarchies */
 107         uint64_t cpu_shares;
 108         uint64_t startup_cpu_shares;
 109
 110         uint64_t blockio_weight;
 111         uint64_t startup_blockio_weight;
 112         LIST_HEAD(CGroupBlockIODeviceWeight, blockio_device_weights);
 113         LIST_HEAD(CGroupBlockIODeviceBandwidth, blockio_device_bandwidths);
 114
 115         uint64_t memory_limit;
 116
 117         CGroupDevicePolicy device_policy;
 118         LIST_HEAD(CGroupDeviceAllow, device_allow);
 119
 120         /* Common */
 121         uint64_t tasks_max;
 122
 123         bool delegate;
 124 };
 125
 126 #include "unit.h"
 127
 128 void cgroup_context_init(CGroupContext *c);
 129 void cgroup_context_done(CGroupContext *c);
 130 void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix);
 131
 132 CGroupMask cgroup_context_get_mask(CGroupContext *c);
 133
 134 void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a);
 135 void cgroup_context_free_io_device_weight(CGroupContext *c, CGroupIODeviceWeight *w);
 136 void cgroup_context_free_io_device_limit(CGroupContext *c, CGroupIODeviceLimit *l);
 137 void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w);
 138 void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b);
 139
 140 CGroupMask unit_get_own_mask(Unit *u);
 141 CGroupMask unit_get_siblings_mask(Unit *u);
 142 CGroupMask unit_get_members_mask(Unit *u);
 143 CGroupMask unit_get_subtree_mask(Unit *u);
 144
 145 CGroupMask unit_get_target_mask(Unit *u);
 146 CGroupMask unit_get_enable_mask(Unit *u);
 147
 148 void unit_update_cgroup_members_masks(Unit *u);
 149
 150 char *unit_default_cgroup_path(Unit *u);
 151 int unit_set_cgroup_path(Unit *u, const char *path);
 152
 153 int unit_realize_cgroup(Unit *u);
 154 void unit_release_cgroup(Unit *u);
 155 void unit_prune_cgroup(Unit *u);
 156 int unit_watch_cgroup(Unit *u);
 157
 158 int unit_attach_pids_to_cgroup(Unit *u);
 159
 160 int manager_setup_cgroup(Manager *m);
 161 void manager_shutdown_cgroup(Manager *m, bool delete);
 162
 163 unsigned manager_dispatch_cgroup_queue(Manager *m);
 164
 165 Unit *manager_get_unit_by_cgroup(Manager *m, const char *cgroup);
 166 Unit *manager_get_unit_by_pid_cgroup(Manager *m, pid_t pid);
 167 Unit* manager_get_unit_by_pid(Manager *m, pid_t pid);
 168
 169 int unit_search_main_pid(Unit *u, pid_t *ret);
 170 int unit_watch_all_pids(Unit *u);
 171
 172 int unit_get_memory_current(Unit *u, uint64_t *ret);
 173 int unit_get_tasks_current(Unit *u, uint64_t *ret);
 174 int unit_get_cpu_usage(Unit *u, nsec_t *ret);
 175 int unit_reset_cpu_usage(Unit *u);
 176
 177 bool unit_cgroup_delegate(Unit *u);
 178
 179 int unit_notify_cgroup_empty(Unit *u);
 180 int manager_notify_cgroup_empty(Manager *m, const char *group);
 181
 182 void unit_invalidate_cgroup(Unit *u, CGroupMask m);
 183
 184 void manager_invalidate_startup_units(Manager *m);
 185
 186 const char* cgroup_device_policy_to_string(CGroupDevicePolicy i) _const_;
 187 CGroupDevicePolicy cgroup_device_policy_from_string(const char *s) _pure_;