271 lines
8.7 KiB
C
271 lines
8.7 KiB
C
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/*
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* Copyright (c) 2013 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _SYS_COALITION_H_
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#define _SYS_COALITION_H_
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <mach/coalition.h>
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__BEGIN_DECLS
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#ifndef KERNEL
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/* Userspace syscall prototypes */
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/* Syscalls */
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int coalition_create(uint64_t *cid_out, uint32_t flags);
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int coalition_terminate(uint64_t cid, uint32_t flags);
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int coalition_reap(uint64_t cid, uint32_t flags);
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/* Wrappers around __coalition_info syscall (with proper struct types) */
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int coalition_info_resource_usage(uint64_t cid, struct coalition_resource_usage *cru, size_t sz);
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int coalition_info_set_name(uint64_t cid, const char *name, size_t size);
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int coalition_info_set_efficiency(uint64_t cid, uint64_t flags);
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int coalition_ledger_set_logical_writes_limit(uint64_t cid, int64_t limit);
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#ifdef PRIVATE
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int coalition_info_debug_info(uint64_t cid, struct coalinfo_debuginfo *cru, size_t sz);
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#endif /* PRIVATE */
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#else /* KERNEL */
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#if CONFIG_COALITIONS
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/* in-kernel BSD interfaces */
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/*
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* coalition_id:
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* Get the unique 64-bit identifier associated with the given coalition
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*/
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uint64_t coalition_id(coalition_t coal);
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/*
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* coalitions_get_list:
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* Get a list of coalitions as procinfo_coalinfo structures
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*
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* This interface is primarily to support libproc.
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*
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* Parameters:
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* type : The COALITION_TYPE of the coalitions to investigate.
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* Valid types can be found in <mach/coalition.h>
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* coal_list : Pointer to an array of procinfo_coalinfo structures
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* that will be filled with information about each
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* coalition whose type matches 'type'
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* NOTE: This can be NULL to perform a simple query of
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* the total number of coalitions.
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* list_sz : The size (in number of structures) of 'coal_list'
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*
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* Returns: 0 if no coalitions matching 'type' are found
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* Otherwise: the number of coalitions whose type matches
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* the 'type' parameter (all coalitions if type == -1)
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*/
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extern size_t coalitions_get_list(int type, struct procinfo_coalinfo *coal_list, size_t list_sz);
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/*
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* task_get_coalition:
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* Return the coalition of a task.
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*
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* Parameters:
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* task : The task to investigate
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* coal_type : The COALITION_TYPE of the coalition to investigate.
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* Valid types can be found in <mach/coalition.h>
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*
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* Returns: valid coalition_t or COALITION_NULL
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*/
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extern coalition_t task_get_coalition(task_t task, int coal_type);
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/*
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* coalition_is_leader:
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* Determine if a task is a coalition leader.
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*
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* Parameters:
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* task : The task to investigate
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* coal : The coalition to test against.
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* NOTE: This can be COALITION_NULL, in case FALSE is returned.
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*
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* Returns: TRUE if 'task' is the coalition's leader, FALSE otherwise.
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*/
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extern boolean_t coalition_is_leader(task_t task, coalition_t coal);
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/*
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* coalition_get_leader:
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* Get a task reference on the leader of a given coalition
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*
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* Parameters:
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* coal : The coalition to investigate
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*
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* Returns: A referenced task pointer of the leader of the given coalition.
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* This could be TASK_NULL if the coalition doesn't have a leader.
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* If the return value is non-null, the caller is responsible to call
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* task_deallocate on the returned value.
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*/
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extern task_t coalition_get_leader(coalition_t coal);
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/*
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* coalition_get_task_count:
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* Sum up the number of tasks in the given coalition
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*
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* Parameters:
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* coal : The coalition to investigate
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*
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* Returns: The number of tasks in the coalition
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*/
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extern int coalition_get_task_count(coalition_t coal);
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/*
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* coalition_get_page_count:
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* Sum up the page count for each task in the coalition specified by 'coal'
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*
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* Parameters:
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* coal : The coalition to investigate
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* ntasks : If non-NULL, this will be filled in with the number of
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* tasks in the coalition.
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*
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* Returns: The sum of all pages used by all members of the coalition
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*/
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extern uint64_t coalition_get_page_count(coalition_t coal, int *ntasks);
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/*
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* coalition_get_pid_list:
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* Gather a list of constituent PIDs of tasks within a coalition playing a
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* given role.
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*
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* Parameters:
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* coal : The coalition to investigate
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* rolemask : The set of coalition task roles used to filter the list
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* of PIDs returned in 'pid_list'. Roles can be combined
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* using the COALITION_ROLEMASK_* tokens found in
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* <mach/coalition.h>. Each PID returned is guaranteed to
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* be tagged with one of the task roles specified by this
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* mask.
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* sort_order : The order in which the returned PIDs should be sorted
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* by default this is in descending page count.
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* pid_list : Pointer to an array of PIDs that will be filled with
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* members of the coalition tagged with the given 'taskrole'
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* list_sz : The size (in number of PIDs) of 'pid_list'
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*
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* Note:
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* This function will return the list of PIDs in a sorted order. By default
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* the PIDs will be sorted by task page count in descending order. In the
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* future it may be possible for user space to specify a level of importance
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* for each coalition member. If there is a user space specified importance,
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* then the list of PIDs returned will be sorted in _ascending_ importance,
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* i.e., pid_list[0] will be the least important task (or the largest consumer
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* of memory). The desired sort order can be specified using the
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* COALITION_SORT_* definitions in osfmk/mach/coalition.h
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*
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* It is also possible to return an unsorted list of PIDs using the special
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* sort type 'COALITION_SORT_NOSORT'
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*
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* Returns: < 0 on ERROR
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* 0 if 'coal' contains no tasks whose role is 'taskrole'
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* (or if the coalition is being deallocated)
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* Otherwise: the number of PIDs in the coalition whose role is
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* 'taskrole'. NOTE: This may be larger or smaller than
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* the 'pid_list' array.
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*
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*/
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extern int coalition_get_pid_list(coalition_t coal, uint32_t rolemask,
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int sort_order, int *pid_list, int list_sz);
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/*
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* task_coalition_role_for_type;
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* Get the role of the given task within the given type of coalition.
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*
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* Parameters:
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* task : The task to investigate
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* coalition_type : The coalition type to check
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*
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* Returns: This task's role or COALITION_TASKROLE_NONE.
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*/
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extern int task_coalition_role_for_type(task_t task, int coalition_type);
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#else /* !CONFIG_COALITIONS */
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static inline uint64_t
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coalition_id(__unused coalition_t coal)
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{
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return 0;
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}
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static inline size_t
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coalitions_get_list(__unused int type,
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__unused struct procinfo_coalinfo *coal_list,
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__unused size_t list_sz)
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{
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return 0;
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}
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static inline coalition_t
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coalition_get_leader(__unused task_t task,
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__unused int coal_type)
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{
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return COALITION_NULL;
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}
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static inline boolean_t
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coalition_is_leader(__unused task_t task,
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__unused coalition_t coal)
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{
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return FALSE;
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}
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static inline int
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coalition_get_task_count(__unused coalition_t coal)
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{
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return 0;
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}
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static inline uint64_t
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coalition_get_page_count(__unused coalition_t coal,
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__unused int *ntasks)
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{
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return 0;
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}
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static inline int
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coalition_get_pid_list(__unused coalition_t coal,
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__unused uint32_t rolemask,
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__unused int sort_order,
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__unused int *pid_list,
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__unused int list_sz)
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{
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return 0;
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}
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#endif
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#endif /* KERNEL */
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__END_DECLS
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#endif /* _SYS_COALITION_H_ */
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