Hello, Dave,
I have read your mail and think over the suggestions and done some
changes. Firstly, I added a new option "-a" to meet the demand that user
can enter a cgroup address and it would display its controller/path name.
Secondly, previously, when user specify controller:path to display
chosen cgroups,there is no option. To make it in accordance with -a
option, I did a little change, that is when user specify
controller:path, there should be a option -g. The following example
illustrates the change.
Previously, user may run : crash> lscgroup cpu:/
but now, user should run : crash > lscgroup -g cpu:/
Accordingly,the help information was revised. You can refer to the
help information and attachment to see detailed changes.
Many thanks
Yongming Yu
Dave Anderson 写道:
----- Original Message -----
And I would suggest a new option, where a user can enter a cgroup
address, and it would find and display its controller/path name:
crash> lscgroup
CGROUP CONTROLLER:PATH
ffff8801f668c400 cpuacct,cpu:/system/nfs-lock.service
crash>
Sorry -- I meant something like this:
crash> lscgroup ffff8801f668c400
CGROUP CONTROLLER:PATH
ffff8801f668c400 cpuacct,cpu:/system/nfs-lock.service
crash>
Dave
--
--------------------------------------------------
Yu Yongming
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.
(FNST)No. 6 Wenzhu Road, Nanjing, 210012, China
EMail：yuym.fnst@xxxxxxxxxxxxxx
Regards__
--------------------------------------------------
/* lscgroup.c - list cgroups
*
* Copyright (C) 2012 FUJITSU LIMITED
* Author: Yu Yongming <yuym.fnst@xxxxxxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#define PATHNAME_MAX 200
#define ROOT_MAX 64
#define CG_CONTROLLER_MAX 20
#define CG_HIER_MAX 20
#define LIST_CER 0x1
#define LIST_ADD 0x2
#define CGROUP_MEMBER_OFFSET_INIT(X,Y,Z) (cgroup_offset_table.X=MEMBER_OFFSET(Y,Z))
#define CGROUP_OFFSET(X) (OFFSET_verify(cgroup_offset_table.X, (char *)__FUNCTION__, __FILE__, __LINE__, #X))
/*
*struct declaration
*/
struct cgroup_offset_table {
long cgroupfs_root_root_list;
long cgroupfs_root_top_cgroup;
long cgroupfs_root_subsys_list;
long cgroupfs_root_actual_subsys_bits;
long cgroupfs_root_name;
long cgroup_sibling;
long cgroup_children;
long cgroup_dentry;
long cgroup_subsys_name;
long cgroup_subsys_sibling;
};
struct cgroup_group_spec {
char path[PATHNAME_MAX];
char *controllers[CG_CONTROLLER_MAX];
};
/*
*function declaration
*/
int _init(void);
int _fini(void);
void cmd_lscgroup(void);
char *help_lscgroup[];
static void cgroup_init(void);
static void get_controller_name(ulong);
static void get_cgroup_name(ulong, char *);
static void parse_top_cgroup(ulong, char *);
static void print_all_cgroups(void);
static int in_cgroupfs_root(char *, struct cgroup_group_spec *);
static ulong locate_top_cgroup(struct cgroup_group_spec *);
static void parse_path(char *, char **);
static ulong locate_cgroup(ulong, ulong, char *);
static void standarlize_path(char *);
static void cgroup_elem(struct cgroup_group_spec *);
static void check_addr(ulong, ulong, char *, char *);
static ulong addr_to_cgroup(ulong, char *);
static void cgroup_addr(char *);
static void cgroup_list_cgroups(char **, struct cgroup_group_spec **, int);
static int parse_cgroup_spec(struct cgroup_group_spec **, char *);
static void free_cgroup_spec(char **, struct cgroup_group_spec **);
/*
* global data
*/
static char controller_name[PATHNAME_MAX];
static int authen = FALSE;
static struct command_table_entry command_table[] = {
{"lscgroup", cmd_lscgroup, help_lscgroup, 0},
{NULL},
};
static struct cgroup_offset_table cgroup_offset_table = { 0 };
char *help_lscgroup[] = {
"lscgroup",
"list all cgroups",
"[-g [controllers:path] [...]] [-a [address]]",
" The command list all present cgroups and their addresses, chosen cgroups",
" and corresponding addresses or cgroup according to input address.",
" When no parameter is specified, the command list all cgroups which are ",
" present. The option -g is used to list subcgroups of cgroup specified by",
" parameter <controllers>:<path>, controllers in <controllers>:<path> can be",
" a comma separated controller list. The option -a is used to list cgroup ",
" whose address equals to the succedent specified parameter. ",
"\nEXAMPLE",
" display all cgroups:\n",
" %s>lscgroup",
" CGROUP CONTROLLER:PATH",
" ffff8801188f8030 blkio:/",
" ffff8801188d3200 blkio:/libvirt",
" ffff88011a724600 blkio:/libvirt/lxc",
" ffff88011adac600 blkio:/libvirt/qemu",
" ffff8801151f6030 net_cls:/",
" ffff88011522a030 freezer:/",
" ffff8801158f9200 freezer:/libvirt",
" ffff88011a724800 freezer:/libvirt/lxc",
" ffff88011adac800 freezer:/libvirt/qemu",
" ffff880115264030 devices:/",
" ffff880115846e00 devices:/libvirt",
" ffff88011a724a00 devices:/libvirt/lxc",
" ffff88011adaca00 devices:/libvirt/qemu",
" ffff88011794c030 memory:/",
" ffff88011738ca00 memory:/libvirt",
" ffff88011a724c00 memory:/libvirt/lxc",
" ffff88011adacc00 memory:/libvirt/qemu",
" ffff880115b20030 cpuacct:/",
" ffff8801191ed600 cpuacct:/libvirt",
" ffff88011a08d200 cpuacct:/libvirt/lxc",
" ffff8801188d3e00 cpuacct:/libvirt/qemu",
" ffff88011923a030 cpu:/",
" ffff880115846600 cpu:/libvirt",
" ffff88011906e400 cpu:/libvirt/lxc",
" ffff880117be6400 cpu:/libvirt/qemu",
" ffff8801173f2030 cpuset:/",
" ffff8801179e6200 cpuset:/libvirt",
" ffff88011a08d000 cpuset:/libvirt/lxc",
" ffff880119fe8000 cpuset:/libvirt/qemu",
" ",
" display chosen cgroups:\n",
" %s>lscgroup -g cpuset:/libvirt -g cpu:/",
" CGROUP CONTROLLER:PATH",
" ffff880115846600 cpu:/libvirt",
" ffff88011906e400 cpu:/libvirt/lxc",
" ffff880117be6400 cpu:/libvirt/qemu",
" CGROUP CONTROLLER:PATH",
" ffff88011923a030 cpu:/",
" ffff880115846600 cpu:/libvirt",
" ffff88011906e400 cpu:/libvirt/lxc",
" ffff880117be6400 cpu:/libvirt/qemu",
" ",
" display cgroup according to input address:\n",
" %s>lscgroup -a ffff880119fe8000 -a ffff880115846600",
" CGROUP CONTROLLER:PATH",
" ffff880119fe8000 cpuset:/libvirt/qemu",
" CGROUP CONTROLLER:PATH",
" ffff880115846600 cpu:/libvirt",
NULL
};
int
_init(void)
{
register_extension(command_table);
return 1;
}
int
_fini(void)
{
return 1;
}
static void
cgroup_init(void)
{
CGROUP_MEMBER_OFFSET_INIT(cgroupfs_root_root_list, "cgroupfs_root",
"root_list");
CGROUP_MEMBER_OFFSET_INIT(cgroupfs_root_top_cgroup, "cgroupfs_root",
"top_cgroup");
CGROUP_MEMBER_OFFSET_INIT(cgroupfs_root_subsys_list, "cgroupfs_root",
"subsys_list");
CGROUP_MEMBER_OFFSET_INIT(cgroupfs_root_actual_subsys_bits,
"cgroupfs_root", "actual_subsys_bits");
CGROUP_MEMBER_OFFSET_INIT(cgroupfs_root_name, "cgroupfs_root",
"name");
CGROUP_MEMBER_OFFSET_INIT(cgroup_sibling, "cgroup", "sibling");
CGROUP_MEMBER_OFFSET_INIT(cgroup_children, "cgroup", "children");
CGROUP_MEMBER_OFFSET_INIT(cgroup_dentry, "cgroup", "dentry");
CGROUP_MEMBER_OFFSET_INIT(cgroup_subsys_name, "cgroup_subsys", "name");
CGROUP_MEMBER_OFFSET_INIT(cgroup_subsys_sibling, "cgroup_subsys",
"sibling");
}
static void
get_controller_name(ulong cgroupfs_root)
{
char name[PATHNAME_MAX];
ulong subsys, next, subsys_list, name_buf, name_addr;
int len;
BZERO(name, PATHNAME_MAX);
BZERO(controller_name, PATHNAME_MAX);
readmem(cgroupfs_root + CGROUP_OFFSET(cgroupfs_root_actual_subsys_bits),
KVADDR, &subsys, sizeof(ulong), "cgroupfs_root_actual_subsys",
FAULT_ON_ERROR);
if(subsys == 0) {
readmem(cgroupfs_root + CGROUP_OFFSET(cgroupfs_root_name),
KVADDR, &name, ROOT_MAX, "cgroupfs_root_name",
FAULT_ON_ERROR);
strcat(controller_name, name);
return ;
}
subsys_list = cgroupfs_root + CGROUP_OFFSET(cgroupfs_root_subsys_list);
readmem(subsys_list, KVADDR, &next, sizeof(ulong),
"cgroupfs_root_subsys_list", FAULT_ON_ERROR);
do {
name_buf = next - CGROUP_OFFSET(cgroup_subsys_sibling)
+ CGROUP_OFFSET(cgroup_subsys_name);
readmem(name_buf, KVADDR, &name_addr, sizeof(ulong),
"cgroup_subsys_name", FAULT_ON_ERROR);
readmem(name_addr, KVADDR, name, sizeof(name),
"char* name", FAULT_ON_ERROR);
strcat(controller_name, name);
strcat(controller_name, ",");
readmem(next, KVADDR, &next, sizeof(ulong),
"list_head", FAULT_ON_ERROR);
} while(next != subsys_list);
len = strlen(controller_name);
controller_name[len-1] = '\0';
}
static void
get_cgroup_name(ulong cgroup, char *name)
{
ulong dentry, name_addr;
char *dentry_buf;
int len;
readmem(cgroup + CGROUP_OFFSET(cgroup_dentry), KVADDR,
&dentry, sizeof(ulong), "cgroup dentry",
FAULT_ON_ERROR);
dentry_buf = GETBUF(SIZE(dentry));
readmem(dentry, KVADDR, dentry_buf, SIZE(dentry),
"dentry", FAULT_ON_ERROR);
len = UINT(dentry_buf + OFFSET(dentry_d_name) + OFFSET(qstr_len));
name_addr = ULONG(dentry_buf + OFFSET(dentry_d_name) + OFFSET(qstr_name));
readmem(name_addr, KVADDR, name, len, "qstr name", FAULT_ON_ERROR);
FREEBUF(dentry_buf);
}
static void
parse_top_cgroup(ulong top_cgroup, char *path)
{
int len;
char tmp_buf[PATHNAME_MAX];
ulong list_head[2], next, child;
BZERO(tmp_buf, PATHNAME_MAX);
get_cgroup_name(top_cgroup, tmp_buf);
if (strlen(path) > 1)
strncat(path, "/", 1);
strncat(path, tmp_buf, strlen(tmp_buf));
fprintf(fp, "%lx %s:%s\n", top_cgroup, controller_name, path);
child = top_cgroup + CGROUP_OFFSET(cgroup_children);
readmem(child, KVADDR, list_head, sizeof(ulong) * 2,
"cgroup children", FAULT_ON_ERROR);
if ((list_head[0] == child) && (list_head[1] == child))
return;
next = list_head[0];
while (next != child) {
top_cgroup = next - CGROUP_OFFSET(cgroup_sibling);
readmem(top_cgroup + CGROUP_OFFSET(cgroup_sibling) +
OFFSET(list_head_next), KVADDR, &next, sizeof(ulong),
"cgroup siblings", FAULT_ON_ERROR);
len = strlen(path);
parse_top_cgroup(top_cgroup, path);
path[len] = '\0';
}
}
static void
print_all_cgroups(void)
{
struct syment *roots;
ulong top_cgroup;
ulong list_head[2], next, cgroupfs_root;;
char path_name[PATHNAME_MAX];
char buf1[BUFSIZE];
BZERO(path_name, PATHNAME_MAX);
if (!(roots = symbol_search("roots")))
error(FATAL, "roots symbol does not exist?\n");
readmem(roots->value, KVADDR, list_head, sizeof(ulong) * 2,
"list_head", FAULT_ON_ERROR);
if ((list_head[0] == roots->value) && (list_head[1] == roots->value)) {
fprintf(fp, "no active cgroup hierarchy in the kernel.");
return;
}
fprintf(fp, "%s CONTROLLER:PATH\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "CGROUP"));
next = list_head[0];
while (next != roots->value) {
cgroupfs_root = next - CGROUP_OFFSET(cgroupfs_root_root_list);
get_controller_name(cgroupfs_root);
top_cgroup = cgroupfs_root +
CGROUP_OFFSET(cgroupfs_root_top_cgroup);
/* print infomation of cgroup and subcgroup */
parse_top_cgroup(top_cgroup, path_name);
readmem(next + OFFSET(list_head_next), KVADDR, &next,
sizeof(ulong), "list_head next", FAULT_ON_ERROR);
BZERO(path_name, PATHNAME_MAX);
BZERO(controller_name, PATHNAME_MAX);
}
}
static int
in_cgroupfs_root(char *tmp_name, struct cgroup_group_spec *elem)
{
char *name;
int i = 0;
name = strtok(tmp_name, ",");
while(name != NULL) {
while(elem->controllers[i] != NULL && i < CG_CONTROLLER_MAX) {
if(STREQ(name, elem->controllers[i]))
return 1;
i++;
}
name = strtok(NULL, ",");
i = 0;
}
return 0;
}
static ulong
locate_top_cgroup(struct cgroup_group_spec *elem)
{
struct syment *roots;
ulong top_cgroup;
ulong list_head[2], next, cgroupfs_root;
char tmp_name[PATHNAME_MAX];
if (!(roots = symbol_search("roots")))
error(FATAL, "roots symbol does not exist?");
readmem(roots->value, KVADDR, list_head, sizeof(ulong)*2,
"list_head", FAULT_ON_ERROR);
if ((list_head[0] == roots->value) && (list_head[1] == roots->value))
return 0;
next = list_head[0];
while (next != roots->value) {
/* begin from first root */
cgroupfs_root = next - CGROUP_OFFSET(cgroupfs_root_root_list);
get_controller_name(cgroupfs_root);
strcpy(tmp_name, controller_name);
if (in_cgroupfs_root(tmp_name, elem)) {
top_cgroup = cgroupfs_root +
CGROUP_OFFSET(cgroupfs_root_top_cgroup);
return top_cgroup;
}
readmem(next + OFFSET(list_head_next), KVADDR, &next,
sizeof(ulong), "list_head", FAULT_ON_ERROR);
BZERO(controller_name, PATHNAME_MAX);
}
return 0;
}
/*
* function parse_path and extracts the input path before the first '/' as
* relatively path which will be used to compare with path name of cgroup.
* In addition, it ignores the unnecessary '/' in the path
*/
static void
parse_path(char *path, char **elem_path)
{
char *token;
token = *elem_path;
if (token[0] == '/') {
*path++ = *token++;
} else {
while (*token) {
if (*token == '/' && *(token + 1) == '/') {
token++;
} else if (*token == '/' && *(token + 1) != '/') {
token++;
break;
} else {
*path++ = *token++;
}
}
}
*elem_path = token;
*path = '\0';
}
static ulong
locate_cgroup(ulong current, ulong prev_addr, char *elem_path)
{
char tmp_buf[PATHNAME_MAX];
char path[PATHNAME_MAX];
char *tmp_path = elem_path;
ulong child, sibling, child_offset, sibling_offset;
if (*elem_path == '\0')
return prev_addr;
BZERO(tmp_buf, PATHNAME_MAX);
get_cgroup_name(current, tmp_buf);
parse_path(path, &elem_path);
readmem(current + CGROUP_OFFSET(cgroup_children), KVADDR, &child,
sizeof(ulong), "cgroup children", FAULT_ON_ERROR);
readmem(current + CGROUP_OFFSET(cgroup_sibling), KVADDR, &sibling,
sizeof(ulong), "cgroup sibling", FAULT_ON_ERROR);
child_offset = CGROUP_OFFSET(cgroup_children);
sibling_offset = CGROUP_OFFSET(cgroup_sibling);
/* parse the children if temp=path_name, do change elem_path */
if (STREQ(tmp_buf, path)) {
if ((child - child_offset != current))
return locate_cgroup(child - sibling_offset,
current, elem_path);
else if (*elem_path == '\0')
return current;
} else {
/* parse the sibling if temp !=path_name, do not chage elem_path */
if (((sibling - child_offset) != prev_addr) &&
((sibling - sibling_offset) != current)) {
elem_path = tmp_path;
return locate_cgroup(sibling - sibling_offset,
prev_addr, elem_path);
}
}
return 0;
}
/*
* make the input path begin with character '/' and end without character '/'
* to cope with the situation that the input path may be like "/xxxxx",
* "xxxxx", "xxxxx/", or "/xxxxx/"
*/
static void
standarlize_path(char *path)
{
int len;
len = strlen(path) - 1;
if (path[len] == '/')
path[len] = '\0';
if (path[0] != '/') {
len = strlen(path);
path[len + 1] = '\0';
while (len) {
path[len] = path[len - 1];
len--;
}
path[0] = '/';
}
}
static void
mani_path(char *path)
{
int len;
standarlize_path(path);
if (STREQ(path, "/")) {
*path = '\0';
return ;
}
len = strlen(path);
while (path[len] != '/') {
path[len] = '\0';
len--;
}
path[len] = '\0';
path[0] = '/';
}
static void
cgroup_elem(struct cgroup_group_spec *list_elem)
{
ulong top_cgroup;
ulong cgroup;
char path_name[PATHNAME_MAX];
char buf1[BUFSIZE];
top_cgroup = locate_top_cgroup(list_elem);
if (top_cgroup == 0) {
fprintf(fp, "can not find cgroup %s, check the input.\n",
list_elem->path);
return ;
}
strcpy(path_name, list_elem->path);
standarlize_path(path_name);
cgroup = locate_cgroup(top_cgroup, top_cgroup, path_name);
if (cgroup == 0) {
fprintf(fp, "can not find cgroup %s, check the input.\n",
list_elem->path);
return ;
}
mani_path(list_elem->path);
fprintf(fp, "%s CONTROLLER:PATH\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "CGROUP"));
parse_top_cgroup(cgroup, list_elem->path);
}
static void
check_addr(ulong top_cgroup, ulong addr_num, char *path, char *full_path)
{
int len;
char tmp_buf[PATHNAME_MAX];
ulong list_head[2], next, child;
BZERO(tmp_buf, PATHNAME_MAX);
get_cgroup_name(top_cgroup, tmp_buf);
if (strlen(path) > 1)
strncat(path, "/", 1);
strncat(path, tmp_buf, strlen(tmp_buf));
if (top_cgroup == addr_num) {
strcpy(full_path, path);
authen = TRUE;
return ;
}
child = top_cgroup + CGROUP_OFFSET(cgroup_children);
readmem(child, KVADDR, list_head, sizeof(ulong) * 2,
"cgroup children", FAULT_ON_ERROR);
next = list_head[0];
while (next != child) {
top_cgroup = next - CGROUP_OFFSET(cgroup_sibling);
readmem(top_cgroup + CGROUP_OFFSET(cgroup_sibling) +
OFFSET(list_head_next), KVADDR, &next, sizeof(ulong),
"cgroup siblings", FAULT_ON_ERROR);
len = strlen(path);
check_addr(top_cgroup, addr_num, path, full_path);
path[len] = '\0';
}
}
static ulong
addr_to_cgroup(ulong addr_num, char *path)
{
struct syment *roots;
ulong top_cgroup;
ulong list_head[2], next, cgroupfs_root;
char path_name[PATHNAME_MAX];
BZERO(path_name, PATHNAME_MAX);
if (!(roots = symbol_search("roots")))
error(FATAL, "roots symbol does not exist?");
readmem(roots->value, KVADDR, list_head, sizeof(ulong)*2,
"list_head", FAULT_ON_ERROR);
next = list_head[0];
while (next != roots->value) {
/* begin from first root */
cgroupfs_root = next - CGROUP_OFFSET(cgroupfs_root_root_list);
get_controller_name(cgroupfs_root);
top_cgroup = cgroupfs_root +
CGROUP_OFFSET(cgroupfs_root_top_cgroup);
check_addr(top_cgroup, addr_num, path_name, path);
if (authen) {
authen = FALSE;
return TRUE;
}
readmem(next + OFFSET(list_head_next), KVADDR, &next,
sizeof(ulong), "list_head", FAULT_ON_ERROR);
BZERO(path_name, PATHNAME_MAX);
BZERO(controller_name, PATHNAME_MAX);
}
return FALSE;
}
static void
cgroup_addr(char *addr)
{
ulong addr_num;
char path[PATHNAME_MAX];
char buf1[BUFSIZE];
BZERO(path, PATHNAME_MAX);
addr_num = stol (addr, FAULT_ON_ERROR, NULL);
if (!addr_to_cgroup(addr_num, path)) {
fprintf(fp, "can not find cgroup with address %lx", addr_num);
return ;
}
fprintf(fp, "%s CONTROLLER:PATH\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "CGROUP"));
fprintf(fp, "%lx %s:%s\n", addr_num, controller_name, path);
}
static void
cgroup_list_cgroups(char **addr, struct cgroup_group_spec *cgroup_list[],
int flags)
{
int i,j;
i = j = 0;
cgroup_init();
if(cgroup_offset_table.cgroupfs_root_root_list == -1) {
fprintf(fp, "cgroup does not exist, check kernel version.");
return ;
}
if (flags == 0 ) {
/* list all the cgroups */
print_all_cgroups();
}
if (flags & LIST_CER) {
/* list the specified cgroups */
while ((cgroup_list[i]->path != NULL)) {
cgroup_elem(cgroup_list[i]);
i++;
}
}
if (flags & LIST_ADD) {
/* list specified addr cgroups */
while ((addr[j] != NULL)) {
cgroup_addr(addr[j]);
j++;
}
}
}
static int
parse_cgroup_spec(struct cgroup_group_spec **list, char *optarg)
{
struct cgroup_group_spec *ptr;
int i, j;
char *controller, *path, *temp;
ptr = *list;
for (i = 0; i < CG_HIER_MAX; i++, ptr++) {
if (!list[i])
break;
}
if (i == CG_HIER_MAX) {
fprintf(fp, "Max allowed hierarchies %d reached\n",
CG_HIER_MAX);
return -1;
}
controller = strtok(optarg, ":");
if (!controller)
return -1;
path = strtok(NULL, ":");
if (!path)
return -1;
list[i] = (struct cgroup_group_spec *)GETBUF(sizeof(**list));
j = 0;
do {
if (j == 0)
temp = strtok(controller, ",");
else
temp = strtok(NULL, ",");
if (temp) {
list[i]->controllers[j] = strdup(temp);
if (!list[i]->controllers[j]) {
FREEBUF(list[i]);
fprintf(fp, "%s\n", strerror(errno));
return -1;
}
}
j++;
} while (temp && (j < (CG_CONTROLLER_MAX - 1)));
strncpy(list[i]->path, path, strlen(path));
return 0;
}
static int
parse_addr_spec(char **addr,char *optarg)
{
int i;
for(i = 0; i < CG_HIER_MAX; i++)
if (!addr[i])
break;
if (i == CG_HIER_MAX) {
fprintf(fp, "Max allowed hierarchies %d reached\n",
CG_HIER_MAX);
return -1;
}
addr[i] = strdup(optarg);
if (!addr[i]) {
fprintf(fp, "%s\n",strerror(errno));
return -1;
}
return 0;
}
static void
free_cgroup_spec(char **addr, struct cgroup_group_spec **list)
{
int i,j;
for (i = 0; i < CG_HIER_MAX; i++) {
if (list[i]) {
for(j = 0; j< CG_CONTROLLER_MAX; j++)
if (list[i]->controllers[j])
free(list[i]->controllers[j]);
FREEBUF(list[i]);
}
else {
break;
}
}
for (i =0; i< CG_HIER_MAX; i++) {
if (addr[i])
free(addr[i]);
else
break;
}
}
void
cmd_lscgroup(void)
{
int c, ret, flags;
char *addr[CG_HIER_MAX];
struct cgroup_group_spec *cgroup_list[CG_HIER_MAX];
ret = flags = 0;
BZERO(cgroup_list, sizeof(cgroup_list));
BZERO(addr, sizeof(addr));
while ((c = getopt(argcnt, args, "a:g:")) != EOF) {
switch(c) {
case 'a':
ret = parse_addr_spec(addr, optarg);
if(ret) {
fprintf(fp, "%s: cgroup address parsing failed"
"(%s)\n", args[0], optarg);
free_cgroup_spec(addr, cgroup_list);
return ;
}
flags |= LIST_ADD;
break;
case 'g':
ret = parse_cgroup_spec(cgroup_list, optarg);
if(ret) {
fprintf(fp, "%s: cgroup controller and path "
"parsing failed(%s)\n",
args[0], optarg);
free_cgroup_spec(addr, cgroup_list);
return ;
}
flags |= LIST_CER;
break;
default:
cmd_usage(pc->curcmd, SYNOPSIS);
return ;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
if (optind < argcnt)
cmd_usage(pc->curcmd, SYNOPSIS);
cgroup_list_cgroups(addr, cgroup_list, flags);
free_cgroup_spec(addr, cgroup_list);
}
--
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