#include <kern/kern_types.h>
#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <kern/coalition.h>
#include <kern/host.h>
#include <kern/kalloc.h>
#include <kern/ledger.h>
#include <kern/mach_param.h>
#include <kern/task.h>
#include <kern/thread_group.h>
#include <kern/zalloc.h>
#include <libkern/OSAtomic.h>
#include <mach/coalition_notification_server.h>
#include <mach/host_priv.h>
#include <mach/host_special_ports.h>
#include <sys/errno.h>
int coalitions_get_list(int type, struct procinfo_coalinfo *coal_list, int list_sz);
boolean_t coalition_is_leader(task_t task, int coal_type, coalition_t *coal);
task_t coalition_get_leader(coalition_t coal);
int coalition_get_task_count(coalition_t coal);
uint64_t coalition_get_page_count(coalition_t coal, int *ntasks);
int coalition_get_pid_list(coalition_t coal, uint32_t rolemask, int sort_order,
int *pid_list, int list_sz);
extern ledger_template_t task_ledger_template;
#define CONFIG_COALITION_MAX CONFIG_TASK_MAX
#define COALITION_CHUNK TASK_CHUNK
int unrestrict_coalition_syscalls;
int merge_adaptive_coalitions;
lck_attr_t coalitions_lck_attr;
lck_grp_t coalitions_lck_grp;
lck_grp_attr_t coalitions_lck_grp_attr;
decl_lck_mtx_data(static, coalitions_list_lock);
static uint64_t coalition_count;
static uint64_t coalition_next_id = 1;
static queue_head_t coalitions_q;
coalition_t init_coalition[COALITION_NUM_TYPES];
coalition_t corpse_coalition[COALITION_NUM_TYPES];
zone_t coalition_zone;
static const char *
coal_type_str(int type)
{
switch (type) {
case COALITION_TYPE_RESOURCE:
return "RESOURCE";
case COALITION_TYPE_JETSAM:
return "JETSAM";
default:
return "<unknown>";
}
}
struct coalition_type {
int type;
int has_default;
kern_return_t (*init)(coalition_t coal, boolean_t privileged);
void (*dealloc)(coalition_t coal);
kern_return_t (*adopt_task)(coalition_t coal, task_t task);
kern_return_t (*remove_task)(coalition_t coal, task_t task);
kern_return_t (*set_taskrole)(coalition_t coal, task_t task, int role);
int (*get_taskrole)(coalition_t coal, task_t task);
void (*iterate_tasks)(coalition_t coal, void *ctx, void (*callback)(coalition_t, void *, task_t));
};
static kern_return_t i_coal_resource_init(coalition_t coal, boolean_t privileged);
static void i_coal_resource_dealloc(coalition_t coal);
static kern_return_t i_coal_resource_adopt_task(coalition_t coal, task_t task);
static kern_return_t i_coal_resource_remove_task(coalition_t coal, task_t task);
static kern_return_t i_coal_resource_set_taskrole(coalition_t coal,
task_t task, int role);
static int i_coal_resource_get_taskrole(coalition_t coal, task_t task);
static void i_coal_resource_iterate_tasks(coalition_t coal, void *ctx,
void (*callback)(coalition_t, void *, task_t));
static_assert(COALITION_NUM_THREAD_QOS_TYPES == THREAD_QOS_LAST);
struct i_resource_coalition {
ledger_t ledger;
uint64_t bytesread;
uint64_t byteswritten;
uint64_t energy;
uint64_t gpu_time;
uint64_t logical_immediate_writes;
uint64_t logical_deferred_writes;
uint64_t logical_invalidated_writes;
uint64_t logical_metadata_writes;
uint64_t cpu_ptime;
uint64_t cpu_time_eqos[COALITION_NUM_THREAD_QOS_TYPES];
uint64_t cpu_time_rqos[COALITION_NUM_THREAD_QOS_TYPES];
uint64_t task_count;
uint64_t dead_task_count;
uint64_t last_became_nonempty_time;
uint64_t time_nonempty;
queue_head_t tasks;
};
static kern_return_t i_coal_jetsam_init(coalition_t coal, boolean_t privileged);
static void i_coal_jetsam_dealloc(coalition_t coal);
static kern_return_t i_coal_jetsam_adopt_task(coalition_t coal, task_t task);
static kern_return_t i_coal_jetsam_remove_task(coalition_t coal, task_t task);
static kern_return_t i_coal_jetsam_set_taskrole(coalition_t coal,
task_t task, int role);
static int i_coal_jetsam_get_taskrole(coalition_t coal, task_t task);
static void i_coal_jetsam_iterate_tasks(coalition_t coal, void *ctx,
void (*callback)(coalition_t, void *, task_t));
struct i_jetsam_coalition {
task_t leader;
queue_head_t extensions;
queue_head_t services;
queue_head_t other;
struct thread_group *thread_group;
};
struct coalition {
uint64_t id;
uint32_t type;
uint32_t role;
uint32_t ref_count;
uint32_t active_count;
uint32_t focal_task_count;
uint32_t nonfocal_task_count;
uint32_t privileged : 1;
uint32_t termrequested : 1;
uint32_t terminated : 1;
uint32_t reaped : 1;
uint32_t notified : 1;
uint32_t efficient : 1;
#if DEVELOPMENT || DEBUG
uint32_t should_notify : 1;
#endif
queue_chain_t coalitions;
decl_lck_mtx_data(, lock)
union {
struct i_resource_coalition r;
struct i_jetsam_coalition j;
};
};
static const struct coalition_type
s_coalition_types[COALITION_NUM_TYPES] = {
{
COALITION_TYPE_RESOURCE,
1,
i_coal_resource_init,
i_coal_resource_dealloc,
i_coal_resource_adopt_task,
i_coal_resource_remove_task,
i_coal_resource_set_taskrole,
i_coal_resource_get_taskrole,
i_coal_resource_iterate_tasks,
},
{
COALITION_TYPE_JETSAM,
1,
i_coal_jetsam_init,
i_coal_jetsam_dealloc,
i_coal_jetsam_adopt_task,
i_coal_jetsam_remove_task,
i_coal_jetsam_set_taskrole,
i_coal_jetsam_get_taskrole,
i_coal_jetsam_iterate_tasks,
},
};
#define coal_call(coal, func, ...) \
(s_coalition_types[(coal)->type].func)(coal, ## __VA_ARGS__)
#define coalition_lock(c) do{ lck_mtx_lock(&c->lock); }while(0)
#define coalition_unlock(c) do{ lck_mtx_unlock(&c->lock); }while(0)
#if CONFIG_EMBEDDED
#define COALITION_FOCAL_TASKS_ACCOUNTING COALITION_TYPE_JETSAM
#else
#define COALITION_FOCAL_TASKS_ACCOUNTING COALITION_TYPE_RESOURCE
#endif
static void
coalition_notify_user(uint64_t id, uint32_t flags)
{
mach_port_t user_port;
kern_return_t kr;
kr = host_get_coalition_port(host_priv_self(), &user_port);
if ((kr != KERN_SUCCESS) || !IPC_PORT_VALID(user_port)) {
return;
}
coalition_notification(user_port, id, flags);
ipc_port_release_send(user_port);
}
static kern_return_t
i_coal_resource_init(coalition_t coal, boolean_t privileged)
{
(void)privileged;
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
coal->r.ledger = ledger_instantiate(task_ledger_template,
LEDGER_CREATE_ACTIVE_ENTRIES);
if (coal->r.ledger == NULL) {
return KERN_RESOURCE_SHORTAGE;
}
queue_init(&coal->r.tasks);
return KERN_SUCCESS;
}
static void
i_coal_resource_dealloc(coalition_t coal)
{
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
ledger_dereference(coal->r.ledger);
}
static kern_return_t
i_coal_resource_adopt_task(coalition_t coal, task_t task)
{
struct i_resource_coalition *cr;
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
assert(queue_empty(&task->task_coalition[COALITION_TYPE_RESOURCE]));
cr = &coal->r;
cr->task_count++;
if (cr->task_count < cr->dead_task_count) {
panic("%s: coalition %p id:%llu type:%s task_count(%llu) < dead_task_count(%llu)",
__func__, coal, coal->id, coal_type_str(coal->type),
cr->task_count, cr->dead_task_count);
}
if (cr->task_count - cr->dead_task_count == 1) {
cr->last_became_nonempty_time = mach_absolute_time();
}
enqueue_tail(&cr->tasks, &task->task_coalition[COALITION_TYPE_RESOURCE]);
coal_dbg("Added PID:%d to id:%llu, task_count:%llu, dead_count:%llu, nonempty_time:%llu",
task_pid(task), coal->id, cr->task_count, cr->dead_task_count,
cr->last_became_nonempty_time);
return KERN_SUCCESS;
}
static kern_return_t
i_coal_resource_remove_task(coalition_t coal, task_t task)
{
struct i_resource_coalition *cr;
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
assert(task->coalition[COALITION_TYPE_RESOURCE] == coal);
assert(!queue_empty(&task->task_coalition[COALITION_TYPE_RESOURCE]));
cr = &coal->r;
cr->dead_task_count++;
if (cr->task_count < cr->dead_task_count) {
panic("%s: coalition %p id:%llu type:%s task_count(%llu) < dead_task_count(%llu)",
__func__, coal, coal->id, coal_type_str(coal->type), cr->task_count, cr->dead_task_count);
}
if (cr->task_count - cr->dead_task_count == 0) {
uint64_t last_time_nonempty = mach_absolute_time() - cr->last_became_nonempty_time;
cr->last_became_nonempty_time = 0;
cr->time_nonempty += last_time_nonempty;
}
if (!task_is_exec_copy(task) && !task_did_exec(task)) {
ledger_rollup(cr->ledger, task->ledger);
cr->bytesread += task->task_io_stats->disk_reads.size;
cr->byteswritten += task->task_io_stats->total_io.size - task->task_io_stats->disk_reads.size;
#if !CONFIG_EMBEDDED
cr->gpu_time += task_gpu_utilisation(task);
#else
cr->energy += task_energy(task);
#endif
cr->logical_immediate_writes += task->task_immediate_writes;
cr->logical_deferred_writes += task->task_deferred_writes;
cr->logical_invalidated_writes += task->task_invalidated_writes;
cr->logical_metadata_writes += task->task_metadata_writes;
cr->cpu_ptime += task_cpu_ptime(task);
task_update_cpu_time_qos_stats(task, cr->cpu_time_eqos, cr->cpu_time_rqos);
}
remqueue(&task->task_coalition[COALITION_TYPE_RESOURCE]);
queue_chain_init(task->task_coalition[COALITION_TYPE_RESOURCE]);
coal_dbg("removed PID:%d from id:%llu, task_count:%llu, dead_count:%llu",
task_pid(task), coal->id, cr->task_count, cr->dead_task_count);
return KERN_SUCCESS;
}
static kern_return_t
i_coal_resource_set_taskrole(__unused coalition_t coal,
__unused task_t task, __unused int role)
{
return KERN_SUCCESS;
}
static int
i_coal_resource_get_taskrole(__unused coalition_t coal, __unused task_t task)
{
task_t t;
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
qe_foreach_element(t, &coal->r.tasks, task_coalition[COALITION_TYPE_RESOURCE]) {
if (t == task) {
return COALITION_TASKROLE_UNDEF;
}
}
return -1;
}
static void
i_coal_resource_iterate_tasks(coalition_t coal, void *ctx, void (*callback)(coalition_t, void *, task_t))
{
task_t t;
assert(coal && coal->type == COALITION_TYPE_RESOURCE);
qe_foreach_element(t, &coal->r.tasks, task_coalition[COALITION_TYPE_RESOURCE])
callback(coal, ctx, t);
}
kern_return_t
coalition_resource_usage_internal(coalition_t coal, struct coalition_resource_usage *cru_out)
{
kern_return_t kr;
ledger_amount_t credit, debit;
int i;
if (coal->type != COALITION_TYPE_RESOURCE) {
return KERN_INVALID_ARGUMENT;
}
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (coal == corpse_coalition[i]) {
return KERN_INVALID_ARGUMENT;
}
}
ledger_t sum_ledger = ledger_instantiate(task_ledger_template, LEDGER_CREATE_ACTIVE_ENTRIES);
if (sum_ledger == LEDGER_NULL) {
return KERN_RESOURCE_SHORTAGE;
}
coalition_lock(coal);
ledger_rollup(sum_ledger, coal->r.ledger);
uint64_t bytesread = coal->r.bytesread;
uint64_t byteswritten = coal->r.byteswritten;
uint64_t gpu_time = coal->r.gpu_time;
uint64_t energy = coal->r.energy;
uint64_t logical_immediate_writes = coal->r.logical_immediate_writes;
uint64_t logical_deferred_writes = coal->r.logical_deferred_writes;
uint64_t logical_invalidated_writes = coal->r.logical_invalidated_writes;
uint64_t logical_metadata_writes = coal->r.logical_metadata_writes;
int64_t cpu_time_billed_to_me = 0;
int64_t cpu_time_billed_to_others = 0;
int64_t energy_billed_to_me = 0;
int64_t energy_billed_to_others = 0;
uint64_t cpu_ptime = coal->r.cpu_ptime;
uint64_t cpu_time_eqos[COALITION_NUM_THREAD_QOS_TYPES];
memcpy(cpu_time_eqos, coal->r.cpu_time_eqos, sizeof(cpu_time_eqos));
uint64_t cpu_time_rqos[COALITION_NUM_THREAD_QOS_TYPES];
memcpy(cpu_time_rqos, coal->r.cpu_time_rqos, sizeof(cpu_time_rqos));
task_t task;
qe_foreach_element(task, &coal->r.tasks, task_coalition[COALITION_TYPE_RESOURCE]) {
if (task_is_exec_copy(task) || task_did_exec(task)) {
continue;
}
ledger_rollup(sum_ledger, task->ledger);
bytesread += task->task_io_stats->disk_reads.size;
byteswritten += task->task_io_stats->total_io.size - task->task_io_stats->disk_reads.size;
#if !CONFIG_EMBEDDED
gpu_time += task_gpu_utilisation(task);
#else
energy += task_energy(task);
#endif
logical_immediate_writes += task->task_immediate_writes;
logical_deferred_writes += task->task_deferred_writes;
logical_invalidated_writes += task->task_invalidated_writes;
logical_metadata_writes += task->task_metadata_writes;
cpu_ptime += task_cpu_ptime(task);
task_update_cpu_time_qos_stats(task, cpu_time_eqos, cpu_time_rqos);
}
kr = ledger_get_balance(sum_ledger, task_ledgers.cpu_time_billed_to_me, (int64_t *)&cpu_time_billed_to_me);
if (kr != KERN_SUCCESS || cpu_time_billed_to_me < 0) {
cpu_time_billed_to_me = 0;
}
kr = ledger_get_balance(sum_ledger, task_ledgers.cpu_time_billed_to_others, (int64_t *)&cpu_time_billed_to_others);
if (kr != KERN_SUCCESS || cpu_time_billed_to_others < 0) {
cpu_time_billed_to_others = 0;
}
kr = ledger_get_balance(sum_ledger, task_ledgers.energy_billed_to_me, (int64_t *)&energy_billed_to_me);
if (kr != KERN_SUCCESS || energy_billed_to_me < 0) {
energy_billed_to_me = 0;
}
kr = ledger_get_balance(sum_ledger, task_ledgers.energy_billed_to_others, (int64_t *)&energy_billed_to_others);
if (kr != KERN_SUCCESS || energy_billed_to_others < 0) {
energy_billed_to_others = 0;
}
cru_out->tasks_started = coal->r.task_count;
cru_out->tasks_exited = coal->r.dead_task_count;
uint64_t time_nonempty = coal->r.time_nonempty;
uint64_t last_became_nonempty_time = coal->r.last_became_nonempty_time;
coalition_unlock(coal);
kr = ledger_get_entries(sum_ledger, task_ledgers.cpu_time,
&credit, &debit);
if (kr != KERN_SUCCESS) {
credit = 0;
}
cru_out->cpu_time = credit;
cru_out->cpu_time_billed_to_me = (uint64_t)cpu_time_billed_to_me;
cru_out->cpu_time_billed_to_others = (uint64_t)cpu_time_billed_to_others;
cru_out->energy_billed_to_me = (uint64_t)energy_billed_to_me;
cru_out->energy_billed_to_others = (uint64_t)energy_billed_to_others;
kr = ledger_get_entries(sum_ledger, task_ledgers.interrupt_wakeups,
&credit, &debit);
if (kr != KERN_SUCCESS) {
credit = 0;
}
cru_out->interrupt_wakeups = credit;
kr = ledger_get_entries(sum_ledger, task_ledgers.platform_idle_wakeups,
&credit, &debit);
if (kr != KERN_SUCCESS) {
credit = 0;
}
cru_out->platform_idle_wakeups = credit;
cru_out->bytesread = bytesread;
cru_out->byteswritten = byteswritten;
cru_out->gpu_time = gpu_time;
cru_out->energy = energy;
cru_out->logical_immediate_writes = logical_immediate_writes;
cru_out->logical_deferred_writes = logical_deferred_writes;
cru_out->logical_invalidated_writes = logical_invalidated_writes;
cru_out->logical_metadata_writes = logical_metadata_writes;
cru_out->cpu_ptime = cpu_ptime;
cru_out->cpu_time_eqos_len = COALITION_NUM_THREAD_QOS_TYPES;
memcpy(cru_out->cpu_time_eqos, cpu_time_eqos, sizeof(cru_out->cpu_time_eqos));
ledger_dereference(sum_ledger);
sum_ledger = LEDGER_NULL;
if (last_became_nonempty_time) {
time_nonempty += mach_absolute_time() - last_became_nonempty_time;
}
absolutetime_to_nanoseconds(time_nonempty, &cru_out->time_nonempty);
return KERN_SUCCESS;
}
static kern_return_t
i_coal_jetsam_init(coalition_t coal, boolean_t privileged)
{
assert(coal && coal->type == COALITION_TYPE_JETSAM);
(void)privileged;
coal->j.leader = TASK_NULL;
queue_head_init(coal->j.extensions);
queue_head_init(coal->j.services);
queue_head_init(coal->j.other);
return KERN_SUCCESS;
}
static void
i_coal_jetsam_dealloc(__unused coalition_t coal)
{
assert(coal && coal->type == COALITION_TYPE_JETSAM);
assert(queue_empty(&coal->j.extensions));
assert(queue_empty(&coal->j.services));
assert(queue_empty(&coal->j.other));
assert(coal->j.leader == TASK_NULL);
}
static kern_return_t
i_coal_jetsam_adopt_task(coalition_t coal, task_t task)
{
struct i_jetsam_coalition *cj;
assert(coal && coal->type == COALITION_TYPE_JETSAM);
cj = &coal->j;
assert(queue_empty(&task->task_coalition[COALITION_TYPE_JETSAM]));
enqueue_tail(&cj->other, &task->task_coalition[COALITION_TYPE_JETSAM]);
coal_dbg("coalition %lld adopted PID:%d as UNDEF",
coal->id, task_pid(task));
return KERN_SUCCESS;
}
static kern_return_t
i_coal_jetsam_remove_task(coalition_t coal, task_t task)
{
assert(coal && coal->type == COALITION_TYPE_JETSAM);
assert(task->coalition[COALITION_TYPE_JETSAM] == coal);
coal_dbg("removing PID:%d from coalition id:%lld",
task_pid(task), coal->id);
if (task == coal->j.leader) {
coal->j.leader = NULL;
coal_dbg(" PID:%d was the leader!", task_pid(task));
} else {
assert(!queue_empty(&task->task_coalition[COALITION_TYPE_JETSAM]));
}
remqueue(&task->task_coalition[COALITION_TYPE_JETSAM]);
queue_chain_init(task->task_coalition[COALITION_TYPE_RESOURCE]);
return KERN_SUCCESS;
}
static kern_return_t
i_coal_jetsam_set_taskrole(coalition_t coal, task_t task, int role)
{
struct i_jetsam_coalition *cj;
queue_t q = NULL;
assert(coal && coal->type == COALITION_TYPE_JETSAM);
assert(task->coalition[COALITION_TYPE_JETSAM] == coal);
cj = &coal->j;
switch (role) {
case COALITION_TASKROLE_LEADER:
coal_dbg("setting PID:%d as LEADER of %lld",
task_pid(task), coal->id);
if (cj->leader != TASK_NULL) {
coal_dbg(" re-queue existing leader (%d) as OTHER",
task_pid(cj->leader));
re_queue_tail(&cj->other, &cj->leader->task_coalition[COALITION_TYPE_JETSAM]);
}
remqueue(&task->task_coalition[COALITION_TYPE_JETSAM]);
queue_chain_init(task->task_coalition[COALITION_TYPE_JETSAM]);
cj->leader = task;
break;
case COALITION_TASKROLE_XPC:
coal_dbg("setting PID:%d as XPC in %lld",
task_pid(task), coal->id);
q = (queue_t)&cj->services;
break;
case COALITION_TASKROLE_EXT:
coal_dbg("setting PID:%d as EXT in %lld",
task_pid(task), coal->id);
q = (queue_t)&cj->extensions;
break;
case COALITION_TASKROLE_NONE:
if (task->coalition[COALITION_TYPE_JETSAM] != coal) {
panic("%s: task %p attempting to set role %d "
"in coalition %p to which it does not belong!", __func__, task, role, coal);
}
case COALITION_TASKROLE_UNDEF:
coal_dbg("setting PID:%d as UNDEF in %lld",
task_pid(task), coal->id);
q = (queue_t)&cj->other;
break;
default:
panic("%s: invalid role(%d) for task", __func__, role);
return KERN_INVALID_ARGUMENT;
}
if (q != NULL) {
re_queue_tail(q, &task->task_coalition[COALITION_TYPE_JETSAM]);
}
return KERN_SUCCESS;
}
static int
i_coal_jetsam_get_taskrole(coalition_t coal, task_t task)
{
struct i_jetsam_coalition *cj;
task_t t;
assert(coal && coal->type == COALITION_TYPE_JETSAM);
assert(task->coalition[COALITION_TYPE_JETSAM] == coal);
cj = &coal->j;
if (task == cj->leader) {
return COALITION_TASKROLE_LEADER;
}
qe_foreach_element(t, &cj->services, task_coalition[COALITION_TYPE_JETSAM]) {
if (t == task) {
return COALITION_TASKROLE_XPC;
}
}
qe_foreach_element(t, &cj->extensions, task_coalition[COALITION_TYPE_JETSAM]) {
if (t == task) {
return COALITION_TASKROLE_EXT;
}
}
qe_foreach_element(t, &cj->other, task_coalition[COALITION_TYPE_JETSAM]) {
if (t == task) {
return COALITION_TASKROLE_UNDEF;
}
}
return COALITION_TASKROLE_NONE;
}
static void
i_coal_jetsam_iterate_tasks(coalition_t coal, void *ctx, void (*callback)(coalition_t, void *, task_t))
{
struct i_jetsam_coalition *cj;
task_t t;
assert(coal && coal->type == COALITION_TYPE_JETSAM);
cj = &coal->j;
if (cj->leader) {
callback(coal, ctx, cj->leader);
}
qe_foreach_element(t, &cj->services, task_coalition[COALITION_TYPE_JETSAM])
callback(coal, ctx, t);
qe_foreach_element(t, &cj->extensions, task_coalition[COALITION_TYPE_JETSAM])
callback(coal, ctx, t);
qe_foreach_element(t, &cj->other, task_coalition[COALITION_TYPE_JETSAM])
callback(coal, ctx, t);
}
kern_return_t
coalition_create_internal(int type, int role, boolean_t privileged, coalition_t *out)
{
kern_return_t kr;
struct coalition *new_coal;
if (type < 0 || type > COALITION_TYPE_MAX) {
return KERN_INVALID_ARGUMENT;
}
new_coal = (struct coalition *)zalloc(coalition_zone);
if (new_coal == COALITION_NULL) {
return KERN_RESOURCE_SHORTAGE;
}
bzero(new_coal, sizeof(*new_coal));
new_coal->type = type;
new_coal->role = role;
kr = coal_call(new_coal, init, privileged);
if (kr != KERN_SUCCESS) {
zfree(coalition_zone, new_coal);
return kr;
}
new_coal->ref_count = 2;
new_coal->privileged = privileged ? TRUE : FALSE;
#if DEVELOPMENT || DEBUG
new_coal->should_notify = 1;
#endif
lck_mtx_init(&new_coal->lock, &coalitions_lck_grp, &coalitions_lck_attr);
lck_mtx_lock(&coalitions_list_lock);
new_coal->id = coalition_next_id++;
coalition_count++;
enqueue_tail(&coalitions_q, &new_coal->coalitions);
KDBG_RELEASE(MACHDBG_CODE(DBG_MACH_COALITION, MACH_COALITION_NEW),
new_coal->id, new_coal->type);
lck_mtx_unlock(&coalitions_list_lock);
coal_dbg("id:%llu, type:%s", new_coal->id, coal_type_str(new_coal->type));
*out = new_coal;
return KERN_SUCCESS;
}
void
coalition_release(coalition_t coal)
{
coalition_lock(coal);
coal->ref_count--;
#if COALITION_DEBUG
uint32_t rc = coal->ref_count;
uint32_t ac = coal->active_count;
#endif
coal_dbg("id:%llu type:%s ref_count:%u active_count:%u%s",
coal->id, coal_type_str(coal->type), rc, ac,
rc <= 0 ? ", will deallocate now" : "");
if (coal->ref_count > 0) {
coalition_unlock(coal);
return;
}
assert(coal->termrequested);
assert(coal->terminated);
assert(coal->active_count == 0);
assert(coal->reaped);
assert(coal->focal_task_count == 0);
assert(coal->nonfocal_task_count == 0);
KDBG_RELEASE(MACHDBG_CODE(DBG_MACH_COALITION, MACH_COALITION_FREE),
coal->id, coal->type);
coal_call(coal, dealloc);
coalition_unlock(coal);
lck_mtx_destroy(&coal->lock, &coalitions_lck_grp);
zfree(coalition_zone, coal);
}
static coalition_t
coalition_find_by_id_internal(uint64_t coal_id)
{
if (coal_id == 0) {
return COALITION_NULL;
}
lck_mtx_assert(&coalitions_list_lock, LCK_MTX_ASSERT_OWNED);
coalition_t coal;
qe_foreach_element(coal, &coalitions_q, coalitions) {
if (coal->id == coal_id) {
return coal;
}
}
return COALITION_NULL;
}
coalition_t
coalition_find_by_id(uint64_t cid)
{
if (cid == 0) {
return COALITION_NULL;
}
lck_mtx_lock(&coalitions_list_lock);
coalition_t coal = coalition_find_by_id_internal(cid);
if (coal == COALITION_NULL) {
lck_mtx_unlock(&coalitions_list_lock);
return COALITION_NULL;
}
coalition_lock(coal);
if (coal->reaped) {
coalition_unlock(coal);
lck_mtx_unlock(&coalitions_list_lock);
return COALITION_NULL;
}
if (coal->ref_count == 0) {
panic("resurrecting coalition %p id:%llu type:%s, active_count:%u\n",
coal, coal->id, coal_type_str(coal->type), coal->active_count);
}
coal->ref_count++;
#if COALITION_DEBUG
uint32_t rc = coal->ref_count;
#endif
coalition_unlock(coal);
lck_mtx_unlock(&coalitions_list_lock);
coal_dbg("id:%llu type:%s ref_count:%u",
coal->id, coal_type_str(coal->type), rc);
return coal;
}
coalition_t
coalition_find_and_activate_by_id(uint64_t cid)
{
if (cid == 0) {
return COALITION_NULL;
}
lck_mtx_lock(&coalitions_list_lock);
coalition_t coal = coalition_find_by_id_internal(cid);
if (coal == COALITION_NULL) {
lck_mtx_unlock(&coalitions_list_lock);
return COALITION_NULL;
}
coalition_lock(coal);
if (coal->reaped || coal->terminated) {
coalition_unlock(coal);
lck_mtx_unlock(&coalitions_list_lock);
return COALITION_NULL;
}
if (coal->ref_count == 0) {
panic("resurrecting coalition %p id:%llu type:%s, active_count:%u\n",
coal, coal->id, coal_type_str(coal->type), coal->active_count);
}
coal->ref_count++;
coal->active_count++;
#if COALITION_DEBUG
uint32_t rc = coal->ref_count;
uint32_t ac = coal->active_count;
#endif
coalition_unlock(coal);
lck_mtx_unlock(&coalitions_list_lock);
coal_dbg("id:%llu type:%s ref_count:%u, active_count:%u",
coal->id, coal_type_str(coal->type), rc, ac);
return coal;
}
uint64_t
coalition_id(coalition_t coal)
{
return coal->id;
}
void
task_coalition_ids(task_t task, uint64_t ids[COALITION_NUM_TYPES])
{
int i;
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (task->coalition[i]) {
ids[i] = task->coalition[i]->id;
} else {
ids[i] = 0;
}
}
}
void
task_coalition_roles(task_t task, int roles[COALITION_NUM_TYPES])
{
int i;
memset(roles, 0, COALITION_NUM_TYPES * sizeof(roles[0]));
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (task->coalition[i]) {
coalition_lock(task->coalition[i]);
roles[i] = coal_call(task->coalition[i],
get_taskrole, task);
coalition_unlock(task->coalition[i]);
} else {
roles[i] = COALITION_TASKROLE_NONE;
}
}
}
int
coalition_type(coalition_t coal)
{
return coal->type;
}
boolean_t
coalition_term_requested(coalition_t coal)
{
return coal->termrequested;
}
boolean_t
coalition_is_terminated(coalition_t coal)
{
return coal->terminated;
}
boolean_t
coalition_is_reaped(coalition_t coal)
{
return coal->reaped;
}
boolean_t
coalition_is_privileged(coalition_t coal)
{
return coal->privileged || unrestrict_coalition_syscalls;
}
boolean_t
task_is_in_privileged_coalition(task_t task, int type)
{
if (type < 0 || type > COALITION_TYPE_MAX) {
return FALSE;
}
if (unrestrict_coalition_syscalls) {
return TRUE;
}
if (!task->coalition[type]) {
return FALSE;
}
return task->coalition[type]->privileged;
}
void
task_coalition_update_gpu_stats(task_t task, uint64_t gpu_ns_delta)
{
coalition_t coal;
assert(task != TASK_NULL);
if (gpu_ns_delta == 0) {
return;
}
coal = task->coalition[COALITION_TYPE_RESOURCE];
assert(coal != COALITION_NULL);
coalition_lock(coal);
coal->r.gpu_time += gpu_ns_delta;
coalition_unlock(coal);
}
boolean_t
task_coalition_adjust_focal_count(task_t task, int count, uint32_t *new_count)
{
coalition_t coal = task->coalition[COALITION_FOCAL_TASKS_ACCOUNTING];
if (coal == COALITION_NULL) {
return FALSE;
}
*new_count = hw_atomic_add(&coal->focal_task_count, count);
assert(*new_count != UINT32_MAX);
return TRUE;
}
uint32_t
task_coalition_focal_count(task_t task)
{
coalition_t coal = task->coalition[COALITION_FOCAL_TASKS_ACCOUNTING];
if (coal == COALITION_NULL) {
return 0;
}
return coal->focal_task_count;
}
boolean_t
task_coalition_adjust_nonfocal_count(task_t task, int count, uint32_t *new_count)
{
coalition_t coal = task->coalition[COALITION_FOCAL_TASKS_ACCOUNTING];
if (coal == COALITION_NULL) {
return FALSE;
}
*new_count = hw_atomic_add(&coal->nonfocal_task_count, count);
assert(*new_count != UINT32_MAX);
return TRUE;
}
uint32_t
task_coalition_nonfocal_count(task_t task)
{
coalition_t coal = task->coalition[COALITION_FOCAL_TASKS_ACCOUNTING];
if (coal == COALITION_NULL) {
return 0;
}
return coal->nonfocal_task_count;
}
void
coalition_set_efficient(coalition_t coal)
{
coalition_lock(coal);
coal->efficient = TRUE;
coalition_unlock(coal);
}
void
coalition_for_each_task(coalition_t coal, void *ctx,
void (*callback)(coalition_t, void *, task_t))
{
assert(coal != COALITION_NULL);
coal_dbg("iterating tasks in coalition %p id:%llu type:%s, active_count:%u",
coal, coal->id, coal_type_str(coal->type), coal->active_count);
coalition_lock(coal);
coal_call(coal, iterate_tasks, ctx, callback);
coalition_unlock(coal);
}
void
coalition_remove_active(coalition_t coal)
{
coalition_lock(coal);
assert(!coal->reaped);
assert(coal->active_count > 0);
coal->active_count--;
boolean_t do_notify = FALSE;
uint64_t notify_id = 0;
uint32_t notify_flags = 0;
if (coal->termrequested && coal->active_count == 0) {
assert(!coal->terminated);
coal->terminated = TRUE;
assert(!coal->notified);
coal->notified = TRUE;
#if DEVELOPMENT || DEBUG
do_notify = coal->should_notify;
#else
do_notify = TRUE;
#endif
notify_id = coal->id;
notify_flags = 0;
}
#if COALITION_DEBUG
uint64_t cid = coal->id;
uint32_t rc = coal->ref_count;
int ac = coal->active_count;
int ct = coal->type;
#endif
coalition_unlock(coal);
coal_dbg("id:%llu type:%s ref_count:%u, active_count:%u,%s",
cid, coal_type_str(ct), rc, ac, do_notify ? " NOTIFY" : " ");
if (do_notify) {
coalition_notify_user(notify_id, notify_flags);
}
}
kern_return_t
coalitions_adopt_init_task(task_t task)
{
kern_return_t kr;
kr = coalitions_adopt_task(init_coalition, task);
if (kr != KERN_SUCCESS) {
panic("failed to adopt task %p into default coalition: %d", task, kr);
}
return kr;
}
kern_return_t
coalitions_adopt_corpse_task(task_t task)
{
kern_return_t kr;
kr = coalitions_adopt_task(corpse_coalition, task);
if (kr != KERN_SUCCESS) {
panic("failed to adopt task %p into corpse coalition: %d", task, kr);
}
return kr;
}
static kern_return_t
coalition_adopt_task_internal(coalition_t coal, task_t task)
{
kern_return_t kr;
if (task->coalition[coal->type]) {
return KERN_ALREADY_IN_SET;
}
coalition_lock(coal);
if (coal->reaped || coal->terminated) {
coalition_unlock(coal);
return KERN_TERMINATED;
}
kr = coal_call(coal, adopt_task, task);
if (kr != KERN_SUCCESS) {
goto out_unlock;
}
coal->active_count++;
coal->ref_count++;
task->coalition[coal->type] = coal;
out_unlock:
#if COALITION_DEBUG
(void)coal;
uint64_t cid = coal->id;
uint32_t rc = coal->ref_count;
uint32_t ct = coal->type;
#endif
if (get_task_uniqueid(task) != UINT64_MAX) {
KDBG_RELEASE(MACHDBG_CODE(DBG_MACH_COALITION, MACH_COALITION_ADOPT),
coal->id, get_task_uniqueid(task));
}
coalition_unlock(coal);
coal_dbg("task:%d, id:%llu type:%s ref_count:%u, kr=%d",
task_pid(task), cid, coal_type_str(ct), rc, kr);
return kr;
}
static kern_return_t
coalition_remove_task_internal(task_t task, int type)
{
kern_return_t kr;
coalition_t coal = task->coalition[type];
if (!coal) {
return KERN_SUCCESS;
}
assert(coal->type == (uint32_t)type);
coalition_lock(coal);
kr = coal_call(coal, remove_task, task);
#if COALITION_DEBUG
uint64_t cid = coal->id;
uint32_t rc = coal->ref_count;
int ac = coal->active_count;
int ct = coal->type;
#endif
KDBG_RELEASE(MACHDBG_CODE(DBG_MACH_COALITION, MACH_COALITION_REMOVE),
coal->id, get_task_uniqueid(task));
coalition_unlock(coal);
coal_dbg("id:%llu type:%s ref_count:%u, active_count:%u, kr=%d",
cid, coal_type_str(ct), rc, ac, kr);
coalition_remove_active(coal);
return kr;
}
kern_return_t
coalitions_adopt_task(coalition_t *coals, task_t task)
{
int i;
kern_return_t kr;
if (!coals || coals[COALITION_TYPE_RESOURCE] == COALITION_NULL) {
return KERN_INVALID_ARGUMENT;
}
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (coals[i] && coals[i]->type != (uint32_t)i) {
return KERN_INVALID_ARGUMENT;
}
}
for (i = 0; i < COALITION_NUM_TYPES; i++) {
kr = KERN_SUCCESS;
if (coals[i]) {
kr = coalition_adopt_task_internal(coals[i], task);
}
if (kr != KERN_SUCCESS) {
while (--i >= 0) {
if (task->coalition[i]) {
coalition_remove_task_internal(task, i);
}
}
break;
}
}
return kr;
}
kern_return_t
coalitions_remove_task(task_t task)
{
kern_return_t kr;
int i;
for (i = 0; i < COALITION_NUM_TYPES; i++) {
kr = coalition_remove_task_internal(task, i);
assert(kr == KERN_SUCCESS);
}
return kr;
}
void
task_release_coalitions(task_t task)
{
int i;
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (task->coalition[i]) {
coalition_release(task->coalition[i]);
} else if (i == COALITION_TYPE_RESOURCE) {
panic("deallocating task %p was not a member of a resource coalition", task);
}
}
}
kern_return_t
coalitions_set_roles(coalition_t coalitions[COALITION_NUM_TYPES],
task_t task, int roles[COALITION_NUM_TYPES])
{
kern_return_t kr = KERN_SUCCESS;
int i;
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (!coalitions[i]) {
continue;
}
coalition_lock(coalitions[i]);
kr = coal_call(coalitions[i], set_taskrole, task, roles[i]);
coalition_unlock(coalitions[i]);
assert(kr == KERN_SUCCESS);
}
return kr;
}
kern_return_t
coalition_request_terminate_internal(coalition_t coal)
{
assert(coal->type >= 0 && coal->type <= COALITION_TYPE_MAX);
if (coal == init_coalition[coal->type]) {
return KERN_DEFAULT_SET;
}
coalition_lock(coal);
if (coal->reaped) {
coalition_unlock(coal);
return KERN_INVALID_NAME;
}
if (coal->terminated || coal->termrequested) {
coalition_unlock(coal);
return KERN_TERMINATED;
}
coal->termrequested = TRUE;
boolean_t do_notify = FALSE;
uint64_t note_id = 0;
uint32_t note_flags = 0;
if (coal->active_count == 0) {
assert(!coal->terminated);
coal->terminated = TRUE;
assert(!coal->notified);
coal->notified = TRUE;
#if DEVELOPMENT || DEBUG
do_notify = coal->should_notify;
#else
do_notify = TRUE;
#endif
note_id = coal->id;
note_flags = 0;
}
coalition_unlock(coal);
if (do_notify) {
coalition_notify_user(note_id, note_flags);
}
return KERN_SUCCESS;
}
kern_return_t
coalition_reap_internal(coalition_t coal)
{
assert(coal->type <= COALITION_TYPE_MAX);
if (coal == init_coalition[coal->type]) {
return KERN_DEFAULT_SET;
}
coalition_lock(coal);
if (coal->reaped) {
coalition_unlock(coal);
return KERN_TERMINATED;
}
if (!coal->terminated) {
coalition_unlock(coal);
return KERN_FAILURE;
}
assert(coal->termrequested);
if (coal->active_count > 0) {
coalition_unlock(coal);
return KERN_FAILURE;
}
coal->reaped = TRUE;
assert(coal->ref_count > 2);
coalition_unlock(coal);
lck_mtx_lock(&coalitions_list_lock);
coalition_count--;
remqueue(&coal->coalitions);
lck_mtx_unlock(&coalitions_list_lock);
coalition_release(coal);
coalition_release(coal);
return KERN_SUCCESS;
}
#if DEVELOPMENT || DEBUG
int
coalition_should_notify(coalition_t coal)
{
int should;
if (!coal) {
return -1;
}
coalition_lock(coal);
should = coal->should_notify;
coalition_unlock(coal);
return should;
}
void
coalition_set_notify(coalition_t coal, int notify)
{
if (!coal) {
return;
}
coalition_lock(coal);
coal->should_notify = !!notify;
coalition_unlock(coal);
}
#endif
void
coalitions_init(void)
{
kern_return_t kr;
int i;
const struct coalition_type *ctype;
coalition_zone = zinit(
sizeof(struct coalition),
CONFIG_COALITION_MAX * sizeof(struct coalition),
COALITION_CHUNK * sizeof(struct coalition),
"coalitions");
zone_change(coalition_zone, Z_NOENCRYPT, TRUE);
queue_head_init(coalitions_q);
if (!PE_parse_boot_argn("unrestrict_coalition_syscalls", &unrestrict_coalition_syscalls,
sizeof(unrestrict_coalition_syscalls))) {
unrestrict_coalition_syscalls = 0;
}
if (!PE_parse_boot_argn("tg_adaptive", &merge_adaptive_coalitions,
sizeof(merge_adaptive_coalitions))) {
merge_adaptive_coalitions = 0;
}
lck_grp_attr_setdefault(&coalitions_lck_grp_attr);
lck_grp_init(&coalitions_lck_grp, "coalition", &coalitions_lck_grp_attr);
lck_attr_setdefault(&coalitions_lck_attr);
lck_mtx_init(&coalitions_list_lock, &coalitions_lck_grp, &coalitions_lck_attr);
init_task_ledgers();
for (i = 0, ctype = &s_coalition_types[0]; i < COALITION_NUM_TYPES; ctype++, i++) {
if (ctype->type != i ||
!ctype->init ||
!ctype->dealloc ||
!ctype->adopt_task ||
!ctype->remove_task) {
panic("%s: Malformed coalition type %s(%d) in slot for type:%s(%d)",
__func__, coal_type_str(ctype->type), ctype->type, coal_type_str(i), i);
}
if (!ctype->has_default) {
continue;
}
kr = coalition_create_internal(ctype->type, COALITION_ROLE_SYSTEM, TRUE, &init_coalition[ctype->type]);
if (kr != KERN_SUCCESS) {
panic("%s: could not create init %s coalition: kr:%d",
__func__, coal_type_str(i), kr);
}
kr = coalition_create_internal(ctype->type, COALITION_ROLE_SYSTEM, FALSE, &corpse_coalition[ctype->type]);
if (kr != KERN_SUCCESS) {
panic("%s: could not create corpse %s coalition: kr:%d",
__func__, coal_type_str(i), kr);
}
}
}
static void
coalition_fill_procinfo(struct coalition *coal,
struct procinfo_coalinfo *coalinfo)
{
coalinfo->coalition_id = coal->id;
coalinfo->coalition_type = coal->type;
coalinfo->coalition_tasks = coalition_get_task_count(coal);
}
int
coalitions_get_list(int type, struct procinfo_coalinfo *coal_list, int list_sz)
{
int ncoals = 0;
struct coalition *coal;
lck_mtx_lock(&coalitions_list_lock);
qe_foreach_element(coal, &coalitions_q, coalitions) {
if (!coal->reaped && (type < 0 || type == (int)coal->type)) {
if (coal_list && ncoals < list_sz) {
coalition_fill_procinfo(coal, &coal_list[ncoals]);
}
++ncoals;
}
}
lck_mtx_unlock(&coalitions_list_lock);
return ncoals;
}
boolean_t
coalition_is_leader(task_t task, int coal_type, coalition_t *coal)
{
coalition_t c;
boolean_t ret;
if (coal) {
*coal = COALITION_NULL;
}
if (!task) {
return FALSE;
}
if (coal_type > COALITION_TYPE_MAX) {
return FALSE;
}
c = task->coalition[coal_type];
if (!c) {
return FALSE;
}
assert((int)c->type == coal_type);
coalition_lock(c);
if (coal) {
*coal = c;
}
ret = FALSE;
if (c->type == COALITION_TYPE_JETSAM && c->j.leader == task) {
ret = TRUE;
}
coalition_unlock(c);
return ret;
}
kern_return_t
coalition_iterate_stackshot(coalition_iterate_fn_t callout, void *arg, uint32_t coalition_type)
{
coalition_t coal;
int i = 0;
qe_foreach_element(coal, &coalitions_q, coalitions) {
if (coal == NULL || !ml_validate_nofault((vm_offset_t)coal, sizeof(struct coalition))) {
return KERN_FAILURE;
}
if (coalition_type == coal->type) {
callout(arg, i++, coal);
}
}
return KERN_SUCCESS;
}
task_t
kdp_coalition_get_leader(coalition_t coal)
{
if (!coal) {
return TASK_NULL;
}
if (coal->type == COALITION_TYPE_JETSAM) {
return coal->j.leader;
}
return TASK_NULL;
}
task_t
coalition_get_leader(coalition_t coal)
{
task_t leader = TASK_NULL;
if (!coal) {
return TASK_NULL;
}
coalition_lock(coal);
if (coal->type != COALITION_TYPE_JETSAM) {
goto out_unlock;
}
leader = coal->j.leader;
if (leader != TASK_NULL) {
task_reference(leader);
}
out_unlock:
coalition_unlock(coal);
return leader;
}
int
coalition_get_task_count(coalition_t coal)
{
int ntasks = 0;
struct queue_entry *qe;
if (!coal) {
return 0;
}
coalition_lock(coal);
switch (coal->type) {
case COALITION_TYPE_RESOURCE:
qe_foreach(qe, &coal->r.tasks)
ntasks++;
break;
case COALITION_TYPE_JETSAM:
if (coal->j.leader) {
ntasks++;
}
qe_foreach(qe, &coal->j.other)
ntasks++;
qe_foreach(qe, &coal->j.extensions)
ntasks++;
qe_foreach(qe, &coal->j.services)
ntasks++;
break;
default:
break;
}
coalition_unlock(coal);
return ntasks;
}
static uint64_t
i_get_list_footprint(queue_t list, int type, int *ntasks)
{
task_t task;
uint64_t bytes = 0;
qe_foreach_element(task, list, task_coalition[type]) {
bytes += get_task_phys_footprint(task);
coal_dbg(" [%d] task_pid:%d, type:%d, footprint:%lld",
*ntasks, task_pid(task), type, bytes);
*ntasks += 1;
}
return bytes;
}
uint64_t
coalition_get_page_count(coalition_t coal, int *ntasks)
{
uint64_t bytes = 0;
int num_tasks = 0;
if (ntasks) {
*ntasks = 0;
}
if (!coal) {
return bytes;
}
coalition_lock(coal);
switch (coal->type) {
case COALITION_TYPE_RESOURCE:
bytes += i_get_list_footprint(&coal->r.tasks, COALITION_TYPE_RESOURCE, &num_tasks);
break;
case COALITION_TYPE_JETSAM:
if (coal->j.leader) {
bytes += get_task_phys_footprint(coal->j.leader);
num_tasks = 1;
}
bytes += i_get_list_footprint(&coal->j.extensions, COALITION_TYPE_JETSAM, &num_tasks);
bytes += i_get_list_footprint(&coal->j.services, COALITION_TYPE_JETSAM, &num_tasks);
bytes += i_get_list_footprint(&coal->j.other, COALITION_TYPE_JETSAM, &num_tasks);
break;
default:
break;
}
coalition_unlock(coal);
if (ntasks) {
*ntasks = num_tasks;
}
return bytes / PAGE_SIZE_64;
}
struct coal_sort_s {
int pid;
int usr_order;
uint64_t bytes;
};
typedef int (*cmpfunc_t)(const void *a, const void *b);
extern void
qsort(void *a, size_t n, size_t es, cmpfunc_t cmp);
static int
dflt_cmp(const void *a, const void *b)
{
const struct coal_sort_s *csA = (const struct coal_sort_s *)a;
const struct coal_sort_s *csB = (const struct coal_sort_s *)b;
if (csA->usr_order == csB->usr_order) {
return (int)((int64_t)csB->bytes - (int64_t)csA->bytes);
}
return csA->usr_order - csB->usr_order;
}
static int
mem_asc_cmp(const void *a, const void *b)
{
const struct coal_sort_s *csA = (const struct coal_sort_s *)a;
const struct coal_sort_s *csB = (const struct coal_sort_s *)b;
return (int)((int64_t)csA->bytes - (int64_t)csB->bytes);
}
static int
mem_dec_cmp(const void *a, const void *b)
{
const struct coal_sort_s *csA = (const struct coal_sort_s *)a;
const struct coal_sort_s *csB = (const struct coal_sort_s *)b;
return (int)((int64_t)csB->bytes - (int64_t)csA->bytes);
}
static int
usr_asc_cmp(const void *a, const void *b)
{
const struct coal_sort_s *csA = (const struct coal_sort_s *)a;
const struct coal_sort_s *csB = (const struct coal_sort_s *)b;
return csA->usr_order - csB->usr_order;
}
static int
usr_dec_cmp(const void *a, const void *b)
{
const struct coal_sort_s *csA = (const struct coal_sort_s *)a;
const struct coal_sort_s *csB = (const struct coal_sort_s *)b;
return csB->usr_order - csA->usr_order;
}
#define MAX_SORTED_PIDS 80
static int
coalition_get_sort_list(coalition_t coal, int sort_order, queue_t list,
struct coal_sort_s *sort_array, int array_sz)
{
int ntasks = 0;
task_t task;
assert(sort_array != NULL);
if (array_sz <= 0) {
return 0;
}
if (!list) {
if (coal->type != COALITION_TYPE_JETSAM ||
coal->j.leader == TASK_NULL) {
return 0;
}
sort_array[0].pid = task_pid(coal->j.leader);
switch (sort_order) {
case COALITION_SORT_DEFAULT:
sort_array[0].usr_order = 0;
case COALITION_SORT_MEM_ASC:
case COALITION_SORT_MEM_DEC:
sort_array[0].bytes = get_task_phys_footprint(coal->j.leader);
break;
case COALITION_SORT_USER_ASC:
case COALITION_SORT_USER_DEC:
sort_array[0].usr_order = 0;
break;
default:
break;
}
return 1;
}
qe_foreach_element(task, list, task_coalition[coal->type]) {
if (ntasks >= array_sz) {
printf("WARNING: more than %d pids in coalition %llu\n",
MAX_SORTED_PIDS, coal->id);
break;
}
sort_array[ntasks].pid = task_pid(task);
switch (sort_order) {
case COALITION_SORT_DEFAULT:
sort_array[ntasks].usr_order = 0;
case COALITION_SORT_MEM_ASC:
case COALITION_SORT_MEM_DEC:
sort_array[ntasks].bytes = get_task_phys_footprint(task);
break;
case COALITION_SORT_USER_ASC:
case COALITION_SORT_USER_DEC:
sort_array[ntasks].usr_order = 0;
break;
default:
break;
}
ntasks++;
}
return ntasks;
}
int
coalition_get_pid_list(coalition_t coal, uint32_t rolemask, int sort_order,
int *pid_list, int list_sz)
{
struct i_jetsam_coalition *cj;
int ntasks = 0;
cmpfunc_t cmp_func = NULL;
struct coal_sort_s sort_array[MAX_SORTED_PIDS] = { {0, 0, 0} };
if (!coal ||
!(rolemask & COALITION_ROLEMASK_ALLROLES) ||
!pid_list || list_sz < 1) {
coal_dbg("Invalid parameters: coal:%p, type:%d, rolemask:0x%x, "
"pid_list:%p, list_sz:%d", coal, coal ? coal->type : -1,
rolemask, pid_list, list_sz);
return -EINVAL;
}
switch (sort_order) {
case COALITION_SORT_NOSORT:
cmp_func = NULL;
break;
case COALITION_SORT_DEFAULT:
cmp_func = dflt_cmp;
break;
case COALITION_SORT_MEM_ASC:
cmp_func = mem_asc_cmp;
break;
case COALITION_SORT_MEM_DEC:
cmp_func = mem_dec_cmp;
break;
case COALITION_SORT_USER_ASC:
cmp_func = usr_asc_cmp;
break;
case COALITION_SORT_USER_DEC:
cmp_func = usr_dec_cmp;
break;
default:
return -ENOTSUP;
}
coalition_lock(coal);
if (coal->type == COALITION_TYPE_RESOURCE) {
ntasks += coalition_get_sort_list(coal, sort_order, &coal->r.tasks,
sort_array, MAX_SORTED_PIDS);
goto unlock_coal;
}
cj = &coal->j;
if (rolemask & COALITION_ROLEMASK_UNDEF) {
ntasks += coalition_get_sort_list(coal, sort_order, &cj->other,
sort_array + ntasks,
MAX_SORTED_PIDS - ntasks);
}
if (rolemask & COALITION_ROLEMASK_XPC) {
ntasks += coalition_get_sort_list(coal, sort_order, &cj->services,
sort_array + ntasks,
MAX_SORTED_PIDS - ntasks);
}
if (rolemask & COALITION_ROLEMASK_EXT) {
ntasks += coalition_get_sort_list(coal, sort_order, &cj->extensions,
sort_array + ntasks,
MAX_SORTED_PIDS - ntasks);
}
if (rolemask & COALITION_ROLEMASK_LEADER) {
ntasks += coalition_get_sort_list(coal, sort_order, NULL,
sort_array + ntasks,
MAX_SORTED_PIDS - ntasks);
}
unlock_coal:
coalition_unlock(coal);
if (cmp_func && ntasks > 1) {
qsort(sort_array, ntasks, sizeof(struct coal_sort_s), cmp_func);
}
for (int i = 0; i < ntasks; i++) {
if (i >= list_sz) {
break;
}
coal_dbg(" [%d] PID:%d, footprint:%lld, usr_order:%d",
i, sort_array[i].pid, sort_array[i].bytes,
sort_array[i].usr_order);
pid_list[i] = sort_array[i].pid;
}
return ntasks;
}