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/*
* Copyright IBM Corporation. 2008
*
* Author: Dhaval Giani <dhaval@linux.vnet.ibm.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Code initiated and designed by Dhaval Giani. All faults are most likely
* his mistake.
*/
#include <libcgroup.h>
#include <libcgroup-internal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
struct cgroup *cgroup_new_cgroup(const char *name)
{
struct cgroup *cgroup = (struct cgroup *)
malloc(sizeof(struct cgroup));
if (!cgroup)
return NULL;
strncpy(cgroup->name, name, sizeof(cgroup->name));
return cgroup;
}
struct cgroup_controller *cgroup_add_controller(struct cgroup *cgroup,
const char *name)
{
int i;
struct cgroup_controller *controller;
/*
* Still not sure how to handle the failure here.
*/
if (cgroup->index >= CG_CONTROLLER_MAX)
return NULL;
/*
* Still not sure how to handle the failure here.
*/
for (i = 0; i < cgroup->index; i++) {
if (strncmp(name, cgroup->controller[i]->name,
sizeof(cgroup->controller[i]->name)) == 0)
return NULL;
}
controller = (struct cgroup_controller *)
malloc(sizeof(struct cgroup_controller));
if (!controller)
return NULL;
strncpy(controller->name, name, sizeof(controller->name));
controller->index = 0;
cgroup->controller[cgroup->index] = controller;
cgroup->index++;
return controller;
}
void cgroup_free(struct cgroup **cgroup)
{
int i, j;
struct cgroup *cg = *cgroup;
/*
* Passing NULL pointers is OK. We just return.
*/
if (!cg)
return;
for (i = 0; i < cg->index; i++) {
for (j = 0; j < cg->controller[i]->index; j++)
free(cg->controller[i]->values[j]);
free(cg->controller[i]);
}
free(cg);
*cgroup = NULL;
}
int cgroup_add_value_string(struct cgroup_controller *controller,
const char *name, const char *value)
{
int i;
struct control_value *cntl_value = (struct control_value *)
malloc(sizeof(struct control_value));
if (!cntl_value)
return ECGCONTROLLERCREATEFAILED;
if (controller->index >= CG_VALUE_MAX)
return ECGMAXVALUESEXCEEDED;
for (i = 0; i < controller->index && i < CG_VALUE_MAX; i++) {
if (!strcmp(controller->values[i]->name, name))
return ECGVALUEEXISTS;
}
strncpy(cntl_value->name, name, sizeof(cntl_value->name));
strncpy(cntl_value->value, value, sizeof(cntl_value->value));
controller->values[controller->index] = cntl_value;
controller->index++;
return 0;
}
int cgroup_add_value_int64(struct cgroup_controller *controller,
const char *name, int64_t value)
{
int i;
unsigned ret;
struct control_value *cntl_value = (struct control_value *)
malloc(sizeof(struct control_value));
if (!cntl_value)
return ECGCONTROLLERCREATEFAILED;
if (controller->index >= CG_VALUE_MAX)
return ECGMAXVALUESEXCEEDED;
for (i = 0; i < controller->index && i < CG_VALUE_MAX; i++) {
if (!strcmp(controller->values[i]->name, name))
return ECGVALUEEXISTS;
}
strncpy(cntl_value->name, name,
sizeof(cntl_value->name));
ret = snprintf(cntl_value->value,
sizeof(cntl_value->value), "%ld", value);
if (ret >= sizeof(cntl_value->value))
return ECGINVAL;
controller->values[controller->index] = cntl_value;
controller->index++;
return 0;
}
int cgroup_add_value_uint64(struct cgroup_controller *controller,
const char *name, u_int64_t value)
{
int i;
unsigned ret;
struct control_value *cntl_value = (struct control_value *)
malloc(sizeof(struct control_value));
if (!cntl_value)
return ECGCONTROLLERCREATEFAILED;
if (controller->index >= CG_VALUE_MAX)
return ECGMAXVALUESEXCEEDED;
for (i = 0; i < controller->index && i < CG_VALUE_MAX; i++) {
if (!strcmp(controller->values[i]->name, name))
return ECGVALUEEXISTS;
}
strncpy(cntl_value->name, name, sizeof(cntl_value->name));
ret = snprintf(cntl_value->value, sizeof(cntl_value->value), "%lu",
value);
if (ret >= sizeof(cntl_value->value))
return ECGINVAL;
controller->values[controller->index] = cntl_value;
controller->index++;
return 0;
}
int cgroup_add_value_bool(struct cgroup_controller *controller,
const char *name, bool value)
{
int i;
unsigned ret;
struct control_value *cntl_value = (struct control_value *)
malloc(sizeof(struct control_value));
if (!cntl_value)
return ECGCONTROLLERCREATEFAILED;
if (controller->index >= CG_VALUE_MAX)
return ECGMAXVALUESEXCEEDED;
for (i = 0; i < controller->index && i < CG_VALUE_MAX; i++) {
if (!strcmp(controller->values[i]->name, name))
return ECGVALUEEXISTS;
}
strncpy(cntl_value->name, name, sizeof(cntl_value->name));
if (value)
ret = snprintf(cntl_value->value, sizeof(cntl_value->value), "1");
else
ret = snprintf(cntl_value->value, sizeof(cntl_value->value), "0");
if (ret >= sizeof(cntl_value->value))
return ECGINVAL;
controller->values[controller->index] = cntl_value;
controller->index++;
return 0;
}
int cgroup_compare_controllers(struct cgroup_controller *cgca,
struct cgroup_controller *cgcb)
{
int i;
if (!cgca || !cgcb)
return ECGINVAL;
if (strcmp(cgca->name, cgcb->name))
return ECGCONTROLLERNOTEQUAL;
if (cgca->index != cgcb->index)
return ECGCONTROLLERNOTEQUAL;
for (i = 0; i < cgca->index; i++) {
struct control_value *cva = cgca->values[i];
struct control_value *cvb = cgcb->values[i];
if (strcmp(cva->name, cvb->name))
return ECGCONTROLLERNOTEQUAL;
if (strcmp(cva->value, cvb->value))
return ECGCONTROLLERNOTEQUAL;
}
return 0;
}
int cgroup_compare_cgroup(struct cgroup *cgroup_a, struct cgroup *cgroup_b)
{
int i;
if (!cgroup_a || !cgroup_b)
return ECGINVAL;
if (strcmp(cgroup_a->name, cgroup_b->name))
return ECGROUPNOTEQUAL;
if (cgroup_a->tasks_uid != cgroup_b->tasks_uid)
return ECGROUPNOTEQUAL;
if (cgroup_a->tasks_gid != cgroup_b->tasks_gid)
return ECGROUPNOTEQUAL;
if (cgroup_a->control_uid != cgroup_b->control_uid)
return ECGROUPNOTEQUAL;
if (cgroup_a->control_gid != cgroup_b->control_gid)
return ECGROUPNOTEQUAL;
if (cgroup_a->index != cgroup_b->index)
return ECGROUPNOTEQUAL;
for (i = 0; i < cgroup_a->index; i++) {
struct cgroup_controller *cgca = cgroup_a->controller[i];
struct cgroup_controller *cgcb = cgroup_b->controller[i];
if (cgroup_compare_controllers(cgca, cgcb))
return ECGCONTROLLERNOTEQUAL;
}
return 0;
}
int cgroup_set_uid_gid(struct cgroup *cgroup, uid_t tasks_uid, gid_t tasks_gid,
uid_t control_uid, gid_t control_gid)
{
if (!cgroup)
return ECGINVAL;
cgroup->tasks_uid = tasks_uid;
cgroup->tasks_gid = tasks_gid;
cgroup->control_uid = control_uid;
cgroup->control_gid = control_gid;
return 0;
}
int cgroup_get_uid_gid(struct cgroup *cgroup, uid_t *tasks_uid,
gid_t *tasks_gid, uid_t *control_uid, gid_t *control_gid)
{
if (!cgroup)
return ECGINVAL;
*tasks_uid = cgroup->tasks_uid;
*tasks_gid = cgroup->tasks_gid;
*control_uid = cgroup->control_uid;
*control_gid = cgroup->control_uid;
return 0;
}
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