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/*
* lsmem - Show memory configuration
*
* Copyright IBM Corp. 2016
* Copyright (C) 2016 Karel Zak <kzak@redhat.com>
*
* 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 would 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <c.h>
#include <nls.h>
#include <path.h>
#include <strutils.h>
#include <closestream.h>
#include <xalloc.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <inttypes.h>
#include <assert.h>
#include <optutils.h>
#include <libsmartcols.h>
#define _PATH_SYS_MEMORY "/sys/devices/system/memory"
#define MEMORY_STATE_ONLINE 0
#define MEMORY_STATE_OFFLINE 1
#define MEMORY_STATE_GOING_OFFLINE 2
#define MEMORY_STATE_UNKNOWN 3
enum zone_id {
ZONE_DMA = 0,
ZONE_DMA32,
ZONE_NORMAL,
ZONE_HIGHMEM,
ZONE_MOVABLE,
ZONE_DEVICE,
ZONE_NONE,
ZONE_UNKNOWN,
MAX_NR_ZONES,
};
struct memory_block {
uint64_t index;
uint64_t count;
int state;
int node;
int nr_zones;
int zones[MAX_NR_ZONES];
unsigned int removable:1;
};
struct lsmem {
struct path_cxt *sysmem; /* _PATH_SYS_MEMORY directory handler */
struct dirent **dirs;
int ndirs;
struct memory_block *blocks;
int nblocks;
uint64_t block_size;
uint64_t mem_online;
uint64_t mem_offline;
struct libscols_table *table;
unsigned int have_nodes : 1,
raw : 1,
export : 1,
json : 1,
noheadings : 1,
summary : 1,
list_all : 1,
bytes : 1,
want_summary : 1,
want_table : 1,
split_by_node : 1,
split_by_state : 1,
split_by_removable : 1,
split_by_zones : 1,
have_zones : 1;
};
enum {
COL_RANGE,
COL_SIZE,
COL_STATE,
COL_REMOVABLE,
COL_BLOCK,
COL_NODE,
COL_ZONES,
};
static char *zone_names[] = {
[ZONE_DMA] = "DMA",
[ZONE_DMA32] = "DMA32",
[ZONE_NORMAL] = "Normal",
[ZONE_HIGHMEM] = "Highmem",
[ZONE_MOVABLE] = "Movable",
[ZONE_DEVICE] = "Device",
[ZONE_NONE] = "None", /* block contains more than one zone, can't be offlined */
[ZONE_UNKNOWN] = "Unknown",
};
/* column names */
struct coldesc {
const char *name; /* header */
double whint; /* width hint (N < 1 is in percent of termwidth) */
int flags; /* SCOLS_FL_* */
const char *help;
};
/* columns descriptions */
static struct coldesc coldescs[] = {
[COL_RANGE] = { "RANGE", 0, 0, N_("start and end address of the memory range")},
[COL_SIZE] = { "SIZE", 5, SCOLS_FL_RIGHT, N_("size of the memory range")},
[COL_STATE] = { "STATE", 0, SCOLS_FL_RIGHT, N_("online status of the memory range")},
[COL_REMOVABLE] = { "REMOVABLE", 0, SCOLS_FL_RIGHT, N_("memory is removable")},
[COL_BLOCK] = { "BLOCK", 0, SCOLS_FL_RIGHT, N_("memory block number or blocks range")},
[COL_NODE] = { "NODE", 0, SCOLS_FL_RIGHT, N_("numa node of memory")},
[COL_ZONES] = { "ZONES", 0, SCOLS_FL_RIGHT, N_("valid zones for the memory range")},
};
/* columns[] array specifies all currently wanted output column. The columns
* are defined by coldescs[] array and you can specify (on command line) each
* column twice. That's enough, dynamically allocated array of the columns is
* unnecessary overkill and over-engineering in this case */
static int columns[ARRAY_SIZE(coldescs) * 2];
static size_t ncolumns;
static inline size_t err_columns_index(size_t arysz, size_t idx)
{
if (idx >= arysz)
errx(EXIT_FAILURE, _("too many columns specified, "
"the limit is %zu columns"),
arysz - 1);
return idx;
}
/*
* name must be null-terminated
*/
static int zone_name_to_id(const char *name)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(zone_names); i++) {
if (!strcasecmp(name, zone_names[i]))
return i;
}
return ZONE_UNKNOWN;
}
#define add_column(ary, n, id) \
((ary)[ err_columns_index(ARRAY_SIZE(ary), (n)) ] = (id))
static int column_name_to_id(const char *name, size_t namesz)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(coldescs); i++) {
const char *cn = coldescs[i].name;
if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
return i;
}
warnx(_("unknown column: %s"), name);
return -1;
}
static inline int get_column_id(int num)
{
assert(num >= 0);
assert((size_t) num < ncolumns);
assert(columns[num] < (int) ARRAY_SIZE(coldescs));
return columns[num];
}
static inline struct coldesc *get_column_desc(int num)
{
return &coldescs[ get_column_id(num) ];
}
static inline void reset_split_policy(struct lsmem *l, int enable)
{
l->split_by_state = enable;
l->split_by_node = enable;
l->split_by_removable = enable;
l->split_by_zones = enable;
}
static void set_split_policy(struct lsmem *l, int cols[], size_t ncols)
{
size_t i;
reset_split_policy(l, 0);
for (i = 0; i < ncols; i++) {
switch (cols[i]) {
case COL_STATE:
l->split_by_state = 1;
break;
case COL_NODE:
l->split_by_node = 1;
break;
case COL_REMOVABLE:
l->split_by_removable = 1;
break;
case COL_ZONES:
l->split_by_zones = 1;
break;
default:
break;
}
}
}
static void add_scols_line(struct lsmem *lsmem, struct memory_block *blk)
{
size_t i;
struct libscols_line *line;
line = scols_table_new_line(lsmem->table, NULL);
if (!line)
err_oom();
for (i = 0; i < ncolumns; i++) {
char *str = NULL;
switch (get_column_id(i)) {
case COL_RANGE:
{
uint64_t start = blk->index * lsmem->block_size;
uint64_t size = blk->count * lsmem->block_size;
xasprintf(&str, "0x%016"PRIx64"-0x%016"PRIx64, start, start + size - 1);
break;
}
case COL_SIZE:
if (lsmem->bytes)
xasprintf(&str, "%"PRId64, (uint64_t) blk->count * lsmem->block_size);
else
str = size_to_human_string(SIZE_SUFFIX_1LETTER,
(uint64_t) blk->count * lsmem->block_size);
break;
case COL_STATE:
str = xstrdup(
blk->state == MEMORY_STATE_ONLINE ? _("online") :
blk->state == MEMORY_STATE_OFFLINE ? _("offline") :
blk->state == MEMORY_STATE_GOING_OFFLINE ? _("on->off") :
"?");
break;
case COL_REMOVABLE:
if (blk->state == MEMORY_STATE_ONLINE)
str = xstrdup(blk->removable ? _("yes") : _("no"));
break;
case COL_BLOCK:
if (blk->count == 1)
xasprintf(&str, "%"PRId64, blk->index);
else
xasprintf(&str, "%"PRId64"-%"PRId64,
blk->index, blk->index + blk->count - 1);
break;
case COL_NODE:
if (lsmem->have_nodes)
xasprintf(&str, "%d", blk->node);
break;
case COL_ZONES:
if (lsmem->have_zones) {
char valid_zones[BUFSIZ];
int j, zone_id;
valid_zones[0] = '\0';
for (j = 0; j < blk->nr_zones; j++) {
zone_id = blk->zones[j];
if (strlen(valid_zones) +
strlen(zone_names[zone_id]) > BUFSIZ - 2)
break;
strcat(valid_zones, zone_names[zone_id]);
if (j + 1 < blk->nr_zones)
strcat(valid_zones, "/");
}
str = xstrdup(valid_zones);
}
break;
}
if (str && scols_line_refer_data(line, i, str) != 0)
err_oom();
}
}
static void fill_scols_table(struct lsmem *lsmem)
{
int i;
for (i = 0; i < lsmem->nblocks; i++)
add_scols_line(lsmem, &lsmem->blocks[i]);
}
static void print_summary(struct lsmem *lsmem)
{
if (lsmem->bytes) {
printf("%-23s %15"PRId64"\n",_("Memory block size:"), lsmem->block_size);
printf("%-23s %15"PRId64"\n",_("Total online memory:"), lsmem->mem_online);
printf("%-23s %15"PRId64"\n",_("Total offline memory:"), lsmem->mem_offline);
} else {
char *p;
if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->block_size)))
printf("%-23s %5s\n",_("Memory block size:"), p);
free(p);
if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->mem_online)))
printf("%-23s %5s\n",_("Total online memory:"), p);
free(p);
if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->mem_offline)))
printf("%-23s %5s\n",_("Total offline memory:"), p);
free(p);
}
}
static int memory_block_get_node(struct lsmem *lsmem, char *name)
{
struct dirent *de;
DIR *dir;
int node;
dir = ul_path_opendir(lsmem->sysmem, name);
if (!dir)
err(EXIT_FAILURE, _("Failed to open %s"), name);
node = -1;
while ((de = readdir(dir)) != NULL) {
if (strncmp("node", de->d_name, 4))
continue;
if (!isdigit_string(de->d_name + 4))
continue;
node = strtol(de->d_name + 4, NULL, 10);
break;
}
closedir(dir);
return node;
}
static void memory_block_read_attrs(struct lsmem *lsmem, char *name,
struct memory_block *blk)
{
char *line = NULL;
int i, x = 0;
memset(blk, 0, sizeof(*blk));
blk->count = 1;
blk->state = MEMORY_STATE_UNKNOWN;
blk->index = strtoumax(name + 6, NULL, 10); /* get <num> of "memory<num>" */
if (ul_path_readf_s32(lsmem->sysmem, &x, "%s/removable", name) == 0)
blk->removable = x == 1;
if (ul_path_readf_string(lsmem->sysmem, &line, "%s/state", name) > 0) {
if (strcmp(line, "offline") == 0)
blk->state = MEMORY_STATE_OFFLINE;
else if (strcmp(line, "online") == 0)
blk->state = MEMORY_STATE_ONLINE;
else if (strcmp(line, "going-offline") == 0)
blk->state = MEMORY_STATE_GOING_OFFLINE;
free(line);
}
if (lsmem->have_nodes)
blk->node = memory_block_get_node(lsmem, name);
blk->nr_zones = 0;
if (lsmem->have_zones &&
ul_path_readf_string(lsmem->sysmem, &line, "%s/valid_zones", name) > 0) {
char *token = strtok(line, " ");
for (i = 0; token && i < MAX_NR_ZONES; i++) {
blk->zones[i] = zone_name_to_id(token);
blk->nr_zones++;
token = strtok(NULL, " ");
}
free(line);
}
}
static int is_mergeable(struct lsmem *lsmem, struct memory_block *blk)
{
struct memory_block *curr;
int i;
if (!lsmem->nblocks)
return 0;
curr = &lsmem->blocks[lsmem->nblocks - 1];
if (lsmem->list_all)
return 0;
if (curr->index + curr->count != blk->index)
return 0;
if (lsmem->split_by_state && curr->state != blk->state)
return 0;
if (lsmem->split_by_removable && curr->removable != blk->removable)
return 0;
if (lsmem->split_by_node && lsmem->have_nodes) {
if (curr->node != blk->node)
return 0;
}
if (lsmem->split_by_zones && lsmem->have_zones) {
if (curr->nr_zones != blk->nr_zones)
return 0;
for (i = 0; i < curr->nr_zones; i++) {
if (curr->zones[i] == ZONE_UNKNOWN ||
curr->zones[i] != blk->zones[i])
return 0;
}
}
return 1;
}
static void read_info(struct lsmem *lsmem)
{
struct memory_block blk;
char buf[128];
int i;
if (ul_path_read_buffer(lsmem->sysmem, buf, sizeof(buf), "block_size_bytes") <= 0)
err(EXIT_FAILURE, _("failed to read memory block size"));
lsmem->block_size = strtoumax(buf, NULL, 16);
for (i = 0; i < lsmem->ndirs; i++) {
memory_block_read_attrs(lsmem, lsmem->dirs[i]->d_name, &blk);
if (blk.state == MEMORY_STATE_ONLINE)
lsmem->mem_online += lsmem->block_size;
else
lsmem->mem_offline += lsmem->block_size;
if (is_mergeable(lsmem, &blk)) {
lsmem->blocks[lsmem->nblocks - 1].count++;
continue;
}
lsmem->nblocks++;
lsmem->blocks = xrealloc(lsmem->blocks, lsmem->nblocks * sizeof(blk));
*&lsmem->blocks[lsmem->nblocks - 1] = blk;
}
}
static int memory_block_filter(const struct dirent *de)
{
if (strncmp("memory", de->d_name, 6))
return 0;
return isdigit_string(de->d_name + 6);
}
static void read_basic_info(struct lsmem *lsmem)
{
char dir[PATH_MAX];
if (ul_path_access(lsmem->sysmem, F_OK, "block_size_bytes") != 0)
errx(EXIT_FAILURE, _("This system does not support memory blocks"));
ul_path_get_abspath(lsmem->sysmem, dir, sizeof(dir), NULL);
lsmem->ndirs = scandir(dir, &lsmem->dirs, memory_block_filter, versionsort);
if (lsmem->ndirs <= 0)
err(EXIT_FAILURE, _("Failed to read %s"), dir);
if (memory_block_get_node(lsmem, lsmem->dirs[0]->d_name) != -1)
lsmem->have_nodes = 1;
/* The valid_zones sysmem attribute was introduced with kernel 3.18 */
if (ul_path_access(lsmem->sysmem, F_OK, "memory0/valid_zones") == 0)
lsmem->have_zones = 1;
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
size_t i;
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("List the ranges of available memory with their online status.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -J, --json use JSON output format\n"), out);
fputs(_(" -P, --pairs use key=\"value\" output format\n"), out);
fputs(_(" -a, --all list each individual memory block\n"), out);
fputs(_(" -b, --bytes print SIZE in bytes rather than in human readable format\n"), out);
fputs(_(" -n, --noheadings don't print headings\n"), out);
fputs(_(" -o, --output <list> output columns\n"), out);
fputs(_(" --output-all output all columns\n"), out);
fputs(_(" -r, --raw use raw output format\n"), out);
fputs(_(" -S, --split <list> split ranges by specified columns\n"), out);
fputs(_(" -s, --sysroot <dir> use the specified directory as system root\n"), out);
fputs(_(" --summary[=when] print summary information (never,always or only)\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(22));
fputs(USAGE_COLUMNS, out);
for (i = 0; i < ARRAY_SIZE(coldescs); i++)
fprintf(out, " %10s %s\n", coldescs[i].name, _(coldescs[i].help));
printf(USAGE_MAN_TAIL("lsmem(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
struct lsmem _lsmem = {
.want_table = 1,
.want_summary = 1
}, *lsmem = &_lsmem;
const char *outarg = NULL, *splitarg = NULL, *prefix = NULL;
int c;
size_t i;
enum {
LSMEM_OPT_SUMARRY = CHAR_MAX + 1,
OPT_OUTPUT_ALL
};
static const struct option longopts[] = {
{"all", no_argument, NULL, 'a'},
{"bytes", no_argument, NULL, 'b'},
{"help", no_argument, NULL, 'h'},
{"json", no_argument, NULL, 'J'},
{"noheadings", no_argument, NULL, 'n'},
{"output", required_argument, NULL, 'o'},
{"output-all", no_argument, NULL, OPT_OUTPUT_ALL},
{"pairs", no_argument, NULL, 'P'},
{"raw", no_argument, NULL, 'r'},
{"sysroot", required_argument, NULL, 's'},
{"split", required_argument, NULL, 'S'},
{"version", no_argument, NULL, 'V'},
{"summary", optional_argument, NULL, LSMEM_OPT_SUMARRY },
{NULL, 0, NULL, 0}
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'J', 'P', 'r' },
{ 'S', 'a' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((c = getopt_long(argc, argv, "abhJno:PrS:s:V", longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch (c) {
case 'a':
lsmem->list_all = 1;
break;
case 'b':
lsmem->bytes = 1;
break;
case 'h':
usage();
break;
case 'J':
lsmem->json = 1;
lsmem->want_summary = 0;
break;
case 'n':
lsmem->noheadings = 1;
break;
case 'o':
outarg = optarg;
break;
case OPT_OUTPUT_ALL:
for (ncolumns = 0; (size_t)ncolumns < ARRAY_SIZE(coldescs); ncolumns++)
columns[ncolumns] = ncolumns;
break;
case 'P':
lsmem->export = 1;
lsmem->want_summary = 0;
break;
case 'r':
lsmem->raw = 1;
lsmem->want_summary = 0;
break;
case 's':
prefix = optarg;
break;
case 'S':
splitarg = optarg;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return 0;
case LSMEM_OPT_SUMARRY:
if (optarg) {
if (strcmp(optarg, "never") == 0)
lsmem->want_summary = 0;
else if (strcmp(optarg, "only") == 0)
lsmem->want_table = 0;
else if (strcmp(optarg, "always") == 0)
lsmem->want_summary = 1;
else
errx(EXIT_FAILURE, _("unsupported --summary argument"));
} else
lsmem->want_table = 0;
break;
default:
errtryhelp(EXIT_FAILURE);
}
}
if (argc != optind) {
warnx(_("bad usage"));
errtryhelp(EXIT_FAILURE);
}
if (lsmem->want_table + lsmem->want_summary == 0)
errx(EXIT_FAILURE, _("options --{raw,json,pairs} and --summary=only are mutually exclusive"));
ul_path_init_debug();
lsmem->sysmem = ul_new_path(_PATH_SYS_MEMORY);
if (!lsmem->sysmem)
err(EXIT_FAILURE, _("failed to initialize %s handler"), _PATH_SYS_MEMORY);
if (prefix && ul_path_set_prefix(lsmem->sysmem, prefix) != 0)
err(EXIT_FAILURE, _("invalid argument to --sysroot"));
/* Shortcut to avoid scols machinery on --summary=only */
if (lsmem->want_table == 0 && lsmem->want_summary) {
read_basic_info(lsmem);
read_info(lsmem);
print_summary(lsmem);
return EXIT_SUCCESS;
}
/*
* Default columns
*/
if (!ncolumns) {
add_column(columns, ncolumns++, COL_RANGE);
add_column(columns, ncolumns++, COL_SIZE);
add_column(columns, ncolumns++, COL_STATE);
add_column(columns, ncolumns++, COL_REMOVABLE);
add_column(columns, ncolumns++, COL_BLOCK);
}
if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
&ncolumns, column_name_to_id) < 0)
return EXIT_FAILURE;
/*
* Initialize output
*/
scols_init_debug(0);
if (!(lsmem->table = scols_new_table()))
errx(EXIT_FAILURE, _("failed to initialize output table"));
scols_table_enable_raw(lsmem->table, lsmem->raw);
scols_table_enable_export(lsmem->table, lsmem->export);
scols_table_enable_json(lsmem->table, lsmem->json);
scols_table_enable_noheadings(lsmem->table, lsmem->noheadings);
if (lsmem->json)
scols_table_set_name(lsmem->table, "memory");
for (i = 0; i < ncolumns; i++) {
struct coldesc *ci = get_column_desc(i);
struct libscols_column *cl;
cl = scols_table_new_column(lsmem->table, ci->name, ci->whint, ci->flags);
if (!cl)
err(EXIT_FAILURE, _("Failed to initialize output column"));
if (lsmem->json) {
int id = get_column_id(i);
switch (id) {
case COL_SIZE:
if (!lsmem->bytes)
break;
/* fallthrough */
case COL_NODE:
scols_column_set_json_type(cl, SCOLS_JSON_NUMBER);
break;
case COL_REMOVABLE:
scols_column_set_json_type(cl, SCOLS_JSON_BOOLEAN);
break;
}
}
}
if (splitarg) {
int split[ARRAY_SIZE(coldescs)] = { 0 };
static size_t nsplits = 0;
if (strcasecmp(splitarg, "none") == 0)
;
else if (string_add_to_idarray(splitarg, split, ARRAY_SIZE(split),
&nsplits, column_name_to_id) < 0)
return EXIT_FAILURE;
set_split_policy(lsmem, split, nsplits);
} else
/* follow output columns */
set_split_policy(lsmem, columns, ncolumns);
/*
* Read data and print output
*/
read_basic_info(lsmem);
read_info(lsmem);
if (lsmem->want_table) {
fill_scols_table(lsmem);
scols_print_table(lsmem->table);
if (lsmem->want_summary)
fputc('\n', stdout);
}
if (lsmem->want_summary)
print_summary(lsmem);
scols_unref_table(lsmem->table);
ul_unref_path(lsmem->sysmem);
return 0;
}
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