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/*
* lsblk(8) - list block devices
*
* Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
* Written by Milan Broz <mbroz@redhat.com>
* 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 <stdio.h>
#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <stdarg.h>
#include <locale.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <assert.h>
#include <blkid.h>
#include "c.h"
#include "pathnames.h"
#include "blkdev.h"
#include "canonicalize.h"
#include "nls.h"
#include "xalloc.h"
#include "strutils.h"
#include "sysfs.h"
#include "closestream.h"
#include "optutils.h"
#include "fileutils.h"
#include "loopdev.h"
#include "buffer.h"
#include "lsblk.h"
UL_DEBUG_DEFINE_MASK(lsblk);
UL_DEBUG_DEFINE_MASKNAMES(lsblk) = UL_DEBUG_EMPTY_MASKNAMES;
#define LSBLK_EXIT_SOMEOK 64
#define LSBLK_EXIT_ALLFAILED 32
static int column_id_to_number(int id);
/* column IDs */
enum {
COL_ALIOFF = 0,
COL_IDLINK,
COL_ID,
COL_DALIGN,
COL_DAX,
COL_DGRAN,
COL_DMAX,
COL_DZERO,
COL_FSAVAIL,
COL_FSROOTS,
COL_FSSIZE,
COL_FSTYPE,
COL_FSUSED,
COL_FSUSEPERC,
COL_FSVERSION,
COL_GROUP,
COL_HCTL,
COL_HOTPLUG,
COL_KNAME,
COL_LABEL,
COL_LOGSEC,
COL_MAJMIN,
COL_MINIO,
COL_MODE,
COL_MODEL,
COL_MQ,
COL_NAME,
COL_OPTIO,
COL_OWNER,
COL_PARTFLAGS,
COL_PARTLABEL,
COL_PARTTYPE,
COL_PARTTYPENAME,
COL_PARTUUID,
COL_PATH,
COL_PHYSEC,
COL_PKNAME,
COL_PTTYPE,
COL_PTUUID,
COL_RA,
COL_RAND,
COL_REV,
COL_RM,
COL_RO,
COL_ROTA,
COL_RQ_SIZE,
COL_SCHED,
COL_SERIAL,
COL_SIZE,
COL_START,
COL_STATE,
COL_SUBSYS,
COL_TARGET,
COL_TARGETS,
COL_TRANSPORT,
COL_TYPE,
COL_UUID,
COL_VENDOR,
COL_WSAME,
COL_WWN,
COL_ZONED,
COL_ZONE_SZ,
COL_ZONE_WGRAN,
COL_ZONE_APP,
COL_ZONE_NR,
COL_ZONE_OMAX,
COL_ZONE_AMAX,
};
/* basic table settings */
enum {
LSBLK_ASCII = (1 << 0),
LSBLK_RAW = (1 << 1),
LSBLK_NOHEADINGS = (1 << 2),
LSBLK_EXPORT = (1 << 3),
LSBLK_TREE = (1 << 4),
LSBLK_JSON = (1 << 5),
LSBLK_SHELLVAR = (1 << 6)
};
/* Types used for qsort() and JSON */
enum {
COLTYPE_STR = 0, /* default */
COLTYPE_NUM = 1, /* always u64 number */
COLTYPE_SORTNUM = 2, /* string on output, u64 for qsort() */
COLTYPE_SIZE = 3, /* srring by default, number when --bytes */
COLTYPE_BOOL = 4 /* 0 or 1 */
};
/* column names */
struct colinfo {
const char *name; /* header */
double whint; /* width hint (N < 1 is in percent of termwidth) */
int flags; /* SCOLS_FL_* */
const char *help;
int type; /* COLTYPE_* */
};
/* columns descriptions */
static struct colinfo infos[] = {
[COL_ALIOFF] = { "ALIGNMENT", 6, SCOLS_FL_RIGHT, N_("alignment offset"), COLTYPE_NUM },
[COL_ID] = { "ID", 0.1, SCOLS_FL_NOEXTREMES, N_("udev ID (based on ID-LINK)") },
[COL_IDLINK] = { "ID-LINK", 0.1, SCOLS_FL_NOEXTREMES, N_("the shortest udev /dev/disk/by-id link name") },
[COL_DALIGN] = { "DISC-ALN", 6, SCOLS_FL_RIGHT, N_("discard alignment offset"), COLTYPE_NUM },
[COL_DAX] = { "DAX", 1, SCOLS_FL_RIGHT, N_("dax-capable device"), COLTYPE_BOOL },
[COL_DGRAN] = { "DISC-GRAN", 6, SCOLS_FL_RIGHT, N_("discard granularity"), COLTYPE_SIZE },
[COL_DMAX] = { "DISC-MAX", 6, SCOLS_FL_RIGHT, N_("discard max bytes"), COLTYPE_SIZE },
[COL_DZERO] = { "DISC-ZERO", 1, SCOLS_FL_RIGHT, N_("discard zeroes data"), COLTYPE_BOOL },
[COL_FSAVAIL] = { "FSAVAIL", 5, SCOLS_FL_RIGHT, N_("filesystem size available"), COLTYPE_SIZE },
[COL_FSROOTS] = { "FSROOTS", 0.1, SCOLS_FL_WRAP, N_("mounted filesystem roots") },
[COL_FSSIZE] = { "FSSIZE", 5, SCOLS_FL_RIGHT, N_("filesystem size"), COLTYPE_SIZE },
[COL_FSTYPE] = { "FSTYPE", 0.1, SCOLS_FL_TRUNC, N_("filesystem type") },
[COL_FSUSED] = { "FSUSED", 5, SCOLS_FL_RIGHT, N_("filesystem size used"), COLTYPE_SIZE },
[COL_FSUSEPERC] = { "FSUSE%", 3, SCOLS_FL_RIGHT, N_("filesystem use percentage") },
[COL_FSVERSION] = { "FSVER", 0.1, SCOLS_FL_TRUNC, N_("filesystem version") },
[COL_GROUP] = { "GROUP", 0.1, SCOLS_FL_TRUNC, N_("group name") },
[COL_HCTL] = { "HCTL", 10, 0, N_("Host:Channel:Target:Lun for SCSI") },
[COL_HOTPLUG] = { "HOTPLUG", 1, SCOLS_FL_RIGHT, N_("removable or hotplug device (usb, pcmcia, ...)"), COLTYPE_BOOL },
[COL_KNAME] = { "KNAME", 0.3, 0, N_("internal kernel device name") },
[COL_LABEL] = { "LABEL", 0.1, 0, N_("filesystem LABEL") },
[COL_LOGSEC] = { "LOG-SEC", 7, SCOLS_FL_RIGHT, N_("logical sector size"), COLTYPE_NUM },
[COL_MAJMIN] = { "MAJ:MIN", 6, 0, N_("major:minor device number"), COLTYPE_SORTNUM },
[COL_MINIO] = { "MIN-IO", 6, SCOLS_FL_RIGHT, N_("minimum I/O size"), COLTYPE_NUM },
[COL_MODEL] = { "MODEL", 0.1, SCOLS_FL_TRUNC, N_("device identifier") },
[COL_MODE] = { "MODE", 10, 0, N_("device node permissions") },
[COL_MQ] = { "MQ", 3, SCOLS_FL_RIGHT, N_("device queues") },
[COL_NAME] = { "NAME", 0.25, SCOLS_FL_NOEXTREMES, N_("device name") },
[COL_OPTIO] = { "OPT-IO", 6, SCOLS_FL_RIGHT, N_("optimal I/O size"), COLTYPE_NUM },
[COL_OWNER] = { "OWNER", 0.1, SCOLS_FL_TRUNC, N_("user name"), },
[COL_PARTFLAGS] = { "PARTFLAGS", 36, 0, N_("partition flags") },
[COL_PARTLABEL] = { "PARTLABEL", 0.1, 0, N_("partition LABEL") },
[COL_PARTTYPENAME] = { "PARTTYPENAME", 0.1, 0, N_("partition type name") },
[COL_PARTTYPE] = { "PARTTYPE", 36, 0, N_("partition type code or UUID") },
[COL_PARTUUID] = { "PARTUUID", 36, 0, N_("partition UUID") },
[COL_PATH] = { "PATH", 0.3, 0, N_("path to the device node") },
[COL_PHYSEC] = { "PHY-SEC", 7, SCOLS_FL_RIGHT, N_("physical sector size"), COLTYPE_NUM },
[COL_PKNAME] = { "PKNAME", 0.3, 0, N_("internal parent kernel device name") },
[COL_PTTYPE] = { "PTTYPE", 0.1, 0, N_("partition table type") },
[COL_PTUUID] = { "PTUUID", 36, 0, N_("partition table identifier (usually UUID)") },
[COL_RAND] = { "RAND", 1, SCOLS_FL_RIGHT, N_("adds randomness"), COLTYPE_BOOL },
[COL_RA] = { "RA", 3, SCOLS_FL_RIGHT, N_("read-ahead of the device"), COLTYPE_NUM },
[COL_REV] = { "REV", 4, SCOLS_FL_RIGHT, N_("device revision") },
[COL_RM] = { "RM", 1, SCOLS_FL_RIGHT, N_("removable device"), COLTYPE_BOOL },
[COL_ROTA] = { "ROTA", 1, SCOLS_FL_RIGHT, N_("rotational device"), COLTYPE_BOOL },
[COL_RO] = { "RO", 1, SCOLS_FL_RIGHT, N_("read-only device"), COLTYPE_BOOL },
[COL_RQ_SIZE]= { "RQ-SIZE", 5, SCOLS_FL_RIGHT, N_("request queue size"), COLTYPE_NUM },
[COL_SCHED] = { "SCHED", 0.1, 0, N_("I/O scheduler name") },
[COL_SERIAL] = { "SERIAL", 0.1, SCOLS_FL_TRUNC, N_("disk serial number") },
[COL_SIZE] = { "SIZE", 5, SCOLS_FL_RIGHT, N_("size of the device"), COLTYPE_SIZE },
[COL_START] = { "START", 5, SCOLS_FL_RIGHT, N_("partition start offset"), COLTYPE_NUM },
[COL_STATE] = { "STATE", 7, SCOLS_FL_TRUNC, N_("state of the device") },
[COL_SUBSYS] = { "SUBSYSTEMS", 0.1, SCOLS_FL_NOEXTREMES, N_("de-duplicated chain of subsystems") },
[COL_TARGETS] = { "MOUNTPOINTS", 0.10, SCOLS_FL_WRAP, N_("all locations where device is mounted") },
[COL_TARGET] = { "MOUNTPOINT", 0.10, SCOLS_FL_TRUNC, N_("where the device is mounted") },
[COL_TRANSPORT] = { "TRAN", 6, 0, N_("device transport type") },
[COL_TYPE] = { "TYPE", 4, 0, N_("device type") },
[COL_UUID] = { "UUID", 36, 0, N_("filesystem UUID") },
[COL_VENDOR] = { "VENDOR", 0.1, SCOLS_FL_TRUNC, N_("device vendor") },
[COL_WSAME] = { "WSAME", 6, SCOLS_FL_RIGHT, N_("write same max bytes"), COLTYPE_SIZE },
[COL_WWN] = { "WWN", 18, 0, N_("unique storage identifier") },
[COL_ZONED] = { "ZONED", 0.3, 0, N_("zone model") },
[COL_ZONE_SZ] = { "ZONE-SZ", 9, SCOLS_FL_RIGHT, N_("zone size"), COLTYPE_SIZE },
[COL_ZONE_WGRAN] = { "ZONE-WGRAN", 10, SCOLS_FL_RIGHT, N_("zone write granularity"), COLTYPE_SIZE },
[COL_ZONE_APP] = { "ZONE-APP", 11, SCOLS_FL_RIGHT, N_("zone append max bytes"), COLTYPE_SIZE },
[COL_ZONE_NR] = { "ZONE-NR", 8, SCOLS_FL_RIGHT, N_("number of zones"), COLTYPE_NUM },
[COL_ZONE_OMAX] = { "ZONE-OMAX", 10, SCOLS_FL_RIGHT, N_("maximum number of open zones"), COLTYPE_NUM },
[COL_ZONE_AMAX] = { "ZONE-AMAX", 10, SCOLS_FL_RIGHT, N_("maximum number of active zones"), COLTYPE_NUM },
};
struct lsblk *lsblk; /* global handler */
/*
* columns[] array specifies all currently wanted output column. The columns
* are defined by infos[] 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(infos) * 2];
static size_t ncolumns;
static inline void add_column(int id)
{
if (ncolumns >= ARRAY_SIZE(columns))
errx(EXIT_FAILURE, _("too many columns specified, "
"the limit is %zu columns"),
ARRAY_SIZE(columns) - 1);
columns[ ncolumns++ ] = id;
}
static inline void add_uniq_column(int id)
{
if (column_id_to_number(id) < 0)
add_column(id);
}
static void lsblk_init_debug(void)
{
__UL_INIT_DEBUG_FROM_ENV(lsblk, LSBLK_DEBUG_, 0, LSBLK_DEBUG);
}
/*
* exclude/include devices filter based on major device numbers
*/
static int excludes[256];
static size_t nexcludes;
static int includes[256];
static size_t nincludes;
static int is_maj_excluded(int maj)
{
size_t i;
assert(ARRAY_SIZE(excludes) > nexcludes);
if (!nexcludes)
return 0; /* filter not enabled, device not excluded */
for (i = 0; i < nexcludes; i++) {
if (excludes[i] == maj) {
DBG(FILTER, ul_debug("exclude: maj=%d", maj));
return 1;
}
}
return 0;
}
static int is_maj_included(int maj)
{
size_t i;
assert(ARRAY_SIZE(includes) > nincludes);
if (!nincludes)
return 1; /* filter not enabled, device is included */
for (i = 0; i < nincludes; i++) {
if (includes[i] == maj) {
DBG(FILTER, ul_debug("include: maj=%d", maj));
return 1;
}
}
return 0;
}
/* Converts column sequential number to column ID (COL_*) */
static int get_column_id(int num)
{
assert(num >= 0);
assert((size_t) num < ncolumns);
assert(columns[num] < (int) ARRAY_SIZE(infos));
return columns[num];
}
/* Returns column description for the column sequential number */
static struct colinfo *get_column_info(int num)
{
return &infos[ get_column_id(num) ];
}
/* Converts column name (as defined in the infos[] to the column ID */
static int column_name_to_id(const char *name, size_t namesz)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(infos); i++) {
const char *cn = infos[i].name;
if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
return i;
}
warnx(_("unknown column: %s"), name);
return -1;
}
/* Converts column ID (COL_*) to column sequential number */
static int column_id_to_number(int id)
{
size_t i;
for (i = 0; i < ncolumns; i++)
if (columns[i] == id)
return i;
return -1;
}
/* Checks for DM prefix in the device name */
static int is_dm(const char *name)
{
return strncmp(name, "dm-", 3) ? 0 : 1;
}
/* Returns full pat to the device node (TODO: what about sysfs_blkdev_get_path()) */
static char *get_device_path(struct lsblk_device *dev)
{
char path[PATH_MAX];
assert(dev);
assert(dev->name);
if (is_dm(dev->name))
return __canonicalize_dm_name(lsblk->sysroot, dev->name);
snprintf(path, sizeof(path), "/dev/%s", dev->name);
sysfs_devname_sys_to_dev(path);
return xstrdup(path);
}
static int is_readonly_device(struct lsblk_device *dev)
{
int fd, ro = 0;
if (ul_path_scanf(dev->sysfs, "ro", "%d", &ro) == 1)
return ro;
/* fallback if "ro" attribute does not exist */
fd = open(dev->filename, O_RDONLY);
if (fd != -1) {
if (ioctl(fd, BLKROGET, &ro) != 0)
ro = 0;
close(fd);
}
return ro;
}
static char *get_scheduler(struct lsblk_device *dev)
{
char buf[128];
char *p, *res = NULL;
if (ul_path_read_buffer(dev->sysfs, buf, sizeof(buf), "queue/scheduler") == 0)
return NULL;
p = strchr(buf, '[');
if (p) {
res = p + 1;
p = strchr(res, ']');
if (p) {
*p = '\0';
res = xstrdup(res);
} else
res = NULL;
}
return res;
}
static char *get_type(struct lsblk_device *dev)
{
char *res = NULL, *p;
if (device_is_partition(dev))
return xstrdup("part");
if (is_dm(dev->name)) {
char *dm_uuid = NULL;
/* The DM_UUID prefix should be set to subsystem owning
* the device - LVM, CRYPT, DMRAID, MPATH, PART */
if (ul_path_read_string(dev->sysfs, &dm_uuid, "dm/uuid") > 0
&& dm_uuid) {
char *tmp = dm_uuid;
char *dm_uuid_prefix = strsep(&tmp, "-");
if (dm_uuid_prefix) {
/* kpartx hack to remove partition number */
if (strncasecmp(dm_uuid_prefix, "part", 4) == 0)
dm_uuid_prefix[4] = '\0';
res = xstrdup(dm_uuid_prefix);
}
}
free(dm_uuid);
if (!res)
/* No UUID or no prefix - just mark it as DM device */
res = xstrdup("dm");
} else if (!strncmp(dev->name, "loop", 4)) {
res = xstrdup("loop");
} else if (!strncmp(dev->name, "md", 2)) {
char *md_level = NULL;
ul_path_read_string(dev->sysfs, &md_level, "md/level");
res = md_level ? md_level : xstrdup("md");
} else {
const char *type = NULL;
int x = 0;
if (ul_path_read_s32(dev->sysfs, &x, "device/type") == 0)
type = blkdev_scsi_type_to_name(x);
if (!type)
type = "disk";
res = xstrdup(type);
}
for (p = res; p && *p; p++)
*p = tolower((unsigned char) *p);
return res;
}
/* Thanks to lsscsi code for idea of detection logic used here */
static const char *get_transport(struct lsblk_device *dev)
{
struct path_cxt *sysfs = dev->sysfs;
char *attr = NULL;
const char *trans = NULL;
/* SCSI - Serial Peripheral Interface */
if (sysfs_blkdev_scsi_host_is(sysfs, "spi"))
trans = "spi";
/* FC/FCoE - Fibre Channel / Fibre Channel over Ethernet */
else if (sysfs_blkdev_scsi_host_is(sysfs, "fc")) {
attr = sysfs_blkdev_scsi_host_strdup_attribute(sysfs, "fc", "symbolic_name");
if (!attr)
return NULL;
trans = strstr(attr, " over ") ? "fcoe" : "fc";
free(attr);
}
/* SAS - Serial Attached SCSI */
else if (sysfs_blkdev_scsi_host_is(sysfs, "sas") ||
sysfs_blkdev_scsi_has_attribute(sysfs, "sas_device"))
trans = "sas";
/* SBP - Serial Bus Protocol (FireWire) */
else if (sysfs_blkdev_scsi_has_attribute(sysfs, "ieee1394_id"))
trans = "sbp";
/* iSCSI */
else if (sysfs_blkdev_scsi_host_is(sysfs, "iscsi"))
trans ="iscsi";
/* USB - Universal Serial Bus */
else if (sysfs_blkdev_scsi_path_contains(sysfs, "usb"))
trans = "usb";
/* ATA, SATA */
else if (sysfs_blkdev_scsi_host_is(sysfs, "scsi")) {
attr = sysfs_blkdev_scsi_host_strdup_attribute(sysfs, "scsi", "proc_name");
if (!attr)
return NULL;
if (!strncmp(attr, "ahci", 4) || !strncmp(attr, "sata", 4))
trans = "sata";
else if (strstr(attr, "ata"))
trans = "ata";
free(attr);
} else if (strncmp(dev->name, "nvme", 4) == 0) {
trans = "nvme";
} else if (strncmp(dev->name, "vd", 2) == 0)
trans = "virtio";
return trans;
}
static char *get_subsystems(struct lsblk_device *dev)
{
char path[PATH_MAX];
char *sub, *chain, *res = NULL;
size_t len = 0, last = 0;
chain = sysfs_blkdev_get_devchain(dev->sysfs, path, sizeof(path));
if (!chain)
return NULL;
while (sysfs_blkdev_next_subsystem(dev->sysfs, chain, &sub) == 0) {
size_t sz;
/* don't create "block:scsi:scsi", but "block:scsi" */
if (len && strcmp(res + last, sub) == 0) {
free(sub);
continue;
}
sz = strlen(sub);
res = xrealloc(res, len + sz + 2);
if (len)
res[len++] = ':';
memcpy(res + len, sub, sz + 1);
last = len;
len += sz;
free(sub);
}
return res;
}
#define is_parsable(_l) (scols_table_is_raw((_l)->table) || \
scols_table_is_export((_l)->table) || \
scols_table_is_json((_l)->table))
static char *mk_name(const char *name)
{
char *p;
if (!name)
return NULL;
if (lsblk->paths)
xasprintf(&p, "/dev/%s", name);
else
p = xstrdup(name);
if (p)
sysfs_devname_sys_to_dev(p);
return p;
}
static char *mk_dm_name(const char *name)
{
char *p;
if (!name)
return NULL;
if (lsblk->paths)
xasprintf(&p, "/dev/mapper/%s", name);
else
p = xstrdup(name);
return p;
}
/* stores data to scols cell userdata (invisible and independent on output)
* to make the original values accessible for sort functions
*/
static void set_sortdata_u64(struct libscols_line *ln, int col, uint64_t x)
{
struct libscols_cell *ce = scols_line_get_cell(ln, col);
uint64_t *data;
if (!ce)
return;
data = xmalloc(sizeof(uint64_t));
*data = x;
scols_cell_set_userdata(ce, data);
}
/* do not modify *data on any error */
static void str2u64(const char *str, uint64_t *data)
{
uintmax_t num;
char *end = NULL;
errno = 0;
if (str == NULL || *str == '\0')
return;
num = strtoumax(str, &end, 10);
if (errno || str == end || (end && *end))
return;
*data = num;
}
static void unref_sortdata(struct libscols_table *tb)
{
struct libscols_iter *itr;
struct libscols_line *ln;
if (!tb || !lsblk->sort_col)
return;
itr = scols_new_iter(SCOLS_ITER_FORWARD);
if (!itr)
return;
while (scols_table_next_line(tb, itr, &ln) == 0) {
struct libscols_cell *ce = scols_line_get_column_cell(ln,
lsblk->sort_col);
void *data = scols_cell_get_userdata(ce);
free(data);
}
scols_free_iter(itr);
}
static char *get_vfs_attribute(struct lsblk_device *dev, int id)
{
char *sizestr;
uint64_t vfs_attr = 0;
if (!dev->fsstat.f_blocks) {
const char *mnt = lsblk_device_get_mountpoint(dev);
if (!mnt || dev->is_swap)
return NULL;
if (statvfs(mnt, &dev->fsstat) != 0)
return NULL;
}
switch(id) {
case COL_FSSIZE:
vfs_attr = dev->fsstat.f_frsize * dev->fsstat.f_blocks;
break;
case COL_FSAVAIL:
vfs_attr = dev->fsstat.f_frsize * dev->fsstat.f_bavail;
break;
case COL_FSUSED:
vfs_attr = dev->fsstat.f_frsize * (dev->fsstat.f_blocks - dev->fsstat.f_bfree);
break;
case COL_FSUSEPERC:
if (dev->fsstat.f_blocks == 0)
return xstrdup("-");
xasprintf(&sizestr, "%.0f%%",
(double)(dev->fsstat.f_blocks - dev->fsstat.f_bfree) /
dev->fsstat.f_blocks * 100);
return sizestr;
}
if (!vfs_attr)
sizestr = xstrdup("0");
else if (lsblk->bytes)
xasprintf(&sizestr, "%ju", vfs_attr);
else
sizestr = size_to_human_string(SIZE_SUFFIX_1LETTER, vfs_attr);
return sizestr;
}
static struct stat *device_get_stat(struct lsblk_device *dev)
{
if (!dev->st.st_rdev
&& stat(dev->filename, &dev->st) != 0)
return NULL;
return &dev->st;
}
static int is_removable_device(struct lsblk_device *dev, struct lsblk_device *parent)
{
struct path_cxt *pc;
if (dev->removable != -1)
goto done;
if (ul_path_scanf(dev->sysfs, "removable", "%d", &dev->removable) == 1)
goto done;
if (parent) {
pc = sysfs_blkdev_get_parent(dev->sysfs);
if (!pc)
goto done;
/* dev is partition and parent is whole-disk */
if (pc == parent->sysfs)
dev->removable = is_removable_device(parent, NULL);
/* parent is something else, use sysfs parent */
else if (ul_path_scanf(pc, "removable", "%d", &dev->removable) != 1)
dev->removable = 0;
}
done:
if (dev->removable == -1)
dev->removable = 0;
return dev->removable;
}
static uint64_t device_get_discard_granularity(struct lsblk_device *dev)
{
if (dev->discard_granularity == (uint64_t) -1
&& ul_path_read_u64(dev->sysfs, &dev->discard_granularity,
"queue/discard_granularity") != 0)
dev->discard_granularity = 0;
return dev->discard_granularity;
}
static void device_read_bytes(struct lsblk_device *dev, char *path, char **str,
uint64_t *sortdata)
{
uint64_t x;
if (lsblk->bytes) {
ul_path_read_string(dev->sysfs, str, path);
if (sortdata)
str2u64(*str, sortdata);
return;
}
if (ul_path_read_u64(dev->sysfs, &x, path) == 0) {
*str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sortdata)
*sortdata = x;
}
}
static void process_mq(struct lsblk_device *dev, char **str)
{
unsigned int queues = 0;
DBG(DEV, ul_debugobj(dev, "%s: process mq", dev->name));
queues = ul_path_count_dirents(dev->sysfs, "mq");
if (!queues) {
*str = xstrdup("1");
DBG(DEV, ul_debugobj(dev, "%s: no mq supported, use a single queue", dev->name));
return;
}
DBG(DEV, ul_debugobj(dev, "%s: has %d queues", dev->name, queues));
xasprintf(str, "%3u", queues);
}
/*
* Generates data (string) for column specified by column ID for specified device. If sortdata
* is not NULL then returns number usable to sort the column if the data are available for the
* column.
*/
static char *device_get_data(
struct lsblk_device *dev, /* device */
struct lsblk_device *parent, /* device parent as defined in the tree */
int id, /* column ID (COL_*) */
uint64_t *sortdata) /* returns sort data as number */
{
struct lsblk_devprop *prop = NULL;
char *str = NULL;
switch(id) {
case COL_NAME:
str = dev->dm_name ? mk_dm_name(dev->dm_name) : mk_name(dev->name);
break;
case COL_KNAME:
str = mk_name(dev->name);
break;
case COL_PKNAME:
if (parent)
str = mk_name(parent->name);
break;
case COL_PATH:
if (dev->filename)
str = xstrdup(dev->filename);
break;
case COL_OWNER:
if (lsblk->sysroot)
prop = lsblk_device_get_properties(dev);
if (prop && prop->owner) {
str = xstrdup(prop->owner);
} else {
struct stat *st = device_get_stat(dev);
struct passwd *pw = st ? getpwuid(st->st_uid) : NULL;
if (pw)
str = xstrdup(pw->pw_name);
}
break;
case COL_GROUP:
if (lsblk->sysroot)
prop = lsblk_device_get_properties(dev);
if (prop && prop->group) {
str = xstrdup(prop->group);
} else {
struct stat *st = device_get_stat(dev);
struct group *gr = st ? getgrgid(st->st_gid) : NULL;
if (gr)
str = xstrdup(gr->gr_name);
}
break;
case COL_MODE:
if (lsblk->sysroot)
prop = lsblk_device_get_properties(dev);
if (prop && prop->mode) {
str = xstrdup(prop->mode);
} else {
struct stat *st = device_get_stat(dev);
char md[11] = { '\0' };
if (st)
str = xstrdup(xstrmode(st->st_mode, md));
}
break;
case COL_MAJMIN:
if (is_parsable(lsblk))
xasprintf(&str, "%u:%u", dev->maj, dev->min);
else
xasprintf(&str, "%3u:%-3u", dev->maj, dev->min);
if (sortdata)
*sortdata = makedev(dev->maj, dev->min);
break;
case COL_FSTYPE:
prop = lsblk_device_get_properties(dev);
if (prop && prop->fstype)
str = xstrdup(prop->fstype);
break;
case COL_FSSIZE:
case COL_FSAVAIL:
case COL_FSUSED:
case COL_FSUSEPERC:
str = get_vfs_attribute(dev, id);
break;
case COL_FSVERSION:
prop = lsblk_device_get_properties(dev);
if (prop && prop->fsversion)
str = xstrdup(prop->fsversion);
break;
case COL_TARGET:
{
const char *p = lsblk_device_get_mountpoint(dev);
if (p)
str = xstrdup(p);
break;
}
case COL_TARGETS:
{
size_t i, n = 0;
struct ul_buffer buf = UL_INIT_BUFFER;
struct libmnt_fs **fss = lsblk_device_get_filesystems(dev, &n);
for (i = 0; i < n; i++) {
struct libmnt_fs *fs = fss[i];
if (mnt_fs_is_swaparea(fs))
ul_buffer_append_string(&buf, "[SWAP]");
else
ul_buffer_append_string(&buf, mnt_fs_get_target(fs));
if (i + 1 < n)
ul_buffer_append_data(&buf, "\n", 1);
}
str = ul_buffer_get_data(&buf, NULL, NULL);
break;
}
case COL_FSROOTS:
{
size_t i, n = 0;
struct ul_buffer buf = UL_INIT_BUFFER;
struct libmnt_fs **fss = lsblk_device_get_filesystems(dev, &n);
for (i = 0; i < n; i++) {
struct libmnt_fs *fs = fss[i];
const char *root = mnt_fs_get_root(fs);
if (mnt_fs_is_swaparea(fs))
continue;
ul_buffer_append_string(&buf, root ? root : "/");
if (i + 1 < n)
ul_buffer_append_data(&buf, "\n", 1);
}
str = ul_buffer_get_data(&buf, NULL, NULL);
break;
}
case COL_LABEL:
prop = lsblk_device_get_properties(dev);
if (prop && prop->label)
str = xstrdup(prop->label);
break;
case COL_UUID:
prop = lsblk_device_get_properties(dev);
if (prop && prop->uuid)
str = xstrdup(prop->uuid);
break;
case COL_PTUUID:
prop = lsblk_device_get_properties(dev);
if (prop && prop->ptuuid)
str = xstrdup(prop->ptuuid);
break;
case COL_PTTYPE:
prop = lsblk_device_get_properties(dev);
if (prop && prop->pttype)
str = xstrdup(prop->pttype);
break;
case COL_PARTTYPE:
prop = lsblk_device_get_properties(dev);
if (prop && prop->parttype)
str = xstrdup(prop->parttype);
break;
case COL_PARTTYPENAME:
prop = lsblk_device_get_properties(dev);
if (prop && prop->parttype && prop->pttype) {
const char *x = lsblk_parttype_code_to_string(
prop->parttype, prop->pttype);
if (x)
str = xstrdup(x);
}
break;
case COL_PARTLABEL:
prop = lsblk_device_get_properties(dev);
if (prop && prop->partlabel)
str = xstrdup(prop->partlabel);
break;
case COL_PARTUUID:
prop = lsblk_device_get_properties(dev);
if (prop && prop->partuuid)
str = xstrdup(prop->partuuid);
break;
case COL_PARTFLAGS:
prop = lsblk_device_get_properties(dev);
if (prop && prop->partflags)
str = xstrdup(prop->partflags);
break;
case COL_WWN:
prop = lsblk_device_get_properties(dev);
if (prop && prop->wwn)
str = xstrdup(prop->wwn);
break;
case COL_IDLINK:
prop = lsblk_device_get_properties(dev);
if (prop && prop->idlink)
str = xstrdup(prop->idlink);
break;
case COL_ID:
prop = lsblk_device_get_properties(dev);
if (prop && prop->idlink) {
/* skip bus/subsystem prefix */
const char *p = strchr(prop->idlink, '-');
str = p && *(p + 1) ? xstrdup(p+1) : xstrdup(prop->idlink);
}
break;
case COL_RA:
ul_path_read_string(dev->sysfs, &str, "queue/read_ahead_kb");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_RO:
str = xstrdup(is_readonly_device(dev) ? "1" : "0");
break;
case COL_RM:
str = xstrdup(is_removable_device(dev, parent) ? "1" : "0");
break;
case COL_HOTPLUG:
str = sysfs_blkdev_is_hotpluggable(dev->sysfs) ? xstrdup("1") : xstrdup("0");
break;
case COL_ROTA:
ul_path_read_string(dev->sysfs, &str, "queue/rotational");
break;
case COL_RAND:
ul_path_read_string(dev->sysfs, &str, "queue/add_random");
break;
case COL_MODEL:
if (!device_is_partition(dev) && dev->nslaves == 0) {
prop = lsblk_device_get_properties(dev);
if (prop && prop->model)
str = xstrdup(prop->model);
else
ul_path_read_string(dev->sysfs, &str, "device/model");
}
break;
case COL_SERIAL:
if (!device_is_partition(dev) && dev->nslaves == 0) {
prop = lsblk_device_get_properties(dev);
if (prop && prop->serial)
str = xstrdup(prop->serial);
else
ul_path_read_string(dev->sysfs, &str, "device/serial");
}
break;
case COL_REV:
if (!device_is_partition(dev) && dev->nslaves == 0)
ul_path_read_string(dev->sysfs, &str, "device/rev");
break;
case COL_VENDOR:
if (!device_is_partition(dev) && dev->nslaves == 0)
ul_path_read_string(dev->sysfs, &str, "device/vendor");
break;
case COL_SIZE:
if (lsblk->bytes)
xasprintf(&str, "%ju", dev->size);
else
str = size_to_human_string(SIZE_SUFFIX_1LETTER, dev->size);
if (sortdata)
*sortdata = dev->size;
break;
case COL_START:
ul_path_read_string(dev->sysfs, &str, "start");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_STATE:
if (!device_is_partition(dev) && !dev->dm_name)
ul_path_read_string(dev->sysfs, &str, "device/state");
else if (dev->dm_name) {
int x = 0;
if (ul_path_read_s32(dev->sysfs, &x, "dm/suspended") == 0)
str = xstrdup(x ? "suspended" : "running");
}
break;
case COL_ALIOFF:
ul_path_read_string(dev->sysfs, &str, "alignment_offset");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_MINIO:
ul_path_read_string(dev->sysfs, &str, "queue/minimum_io_size");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_OPTIO:
ul_path_read_string(dev->sysfs, &str, "queue/optimal_io_size");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_PHYSEC:
ul_path_read_string(dev->sysfs, &str, "queue/physical_block_size");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_LOGSEC:
ul_path_read_string(dev->sysfs, &str, "queue/logical_block_size");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_SCHED:
str = get_scheduler(dev);
break;
case COL_RQ_SIZE:
ul_path_read_string(dev->sysfs, &str, "queue/nr_requests");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_TYPE:
str = get_type(dev);
break;
case COL_HCTL:
{
int h, c, t, l;
if (sysfs_blkdev_scsi_get_hctl(dev->sysfs, &h, &c, &t, &l) == 0)
xasprintf(&str, "%d:%d:%d:%d", h, c, t, l);
break;
}
case COL_TRANSPORT:
{
const char *trans = get_transport(dev);
if (trans)
str = xstrdup(trans);
break;
}
case COL_SUBSYS:
str = get_subsystems(dev);
break;
case COL_DALIGN:
if (device_get_discard_granularity(dev) > 0)
ul_path_read_string(dev->sysfs, &str, "discard_alignment");
if (!str)
str = xstrdup("0");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_DGRAN:
if (lsblk->bytes) {
ul_path_read_string(dev->sysfs, &str, "queue/discard_granularity");
if (sortdata)
str2u64(str, sortdata);
} else {
uint64_t x = device_get_discard_granularity(dev);
str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sortdata)
*sortdata = x;
}
break;
case COL_DMAX:
device_read_bytes(dev, "queue/discard_max_bytes", &str, sortdata);
break;
case COL_DZERO:
if (device_get_discard_granularity(dev) > 0)
ul_path_read_string(dev->sysfs, &str, "queue/discard_zeroes_data");
if (!str)
str = xstrdup("0");
break;
case COL_WSAME:
device_read_bytes(dev, "queue/write_same_max_bytes", &str, sortdata);
if (!str)
str = xstrdup("0");
break;
case COL_ZONED:
ul_path_read_string(dev->sysfs, &str, "queue/zoned");
break;
case COL_ZONE_SZ:
{
uint64_t x;
if (ul_path_read_u64(dev->sysfs, &x, "queue/chunk_sectors") == 0) {
x <<= 9;
if (lsblk->bytes)
xasprintf(&str, "%ju", x);
else
str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sortdata)
*sortdata = x;
}
break;
}
case COL_ZONE_WGRAN:
device_read_bytes(dev, "queue/zone_write_granularity", &str, sortdata);
break;
case COL_ZONE_APP:
device_read_bytes(dev, "queue/zone_append_max_bytes", &str, sortdata);
break;
case COL_ZONE_NR:
ul_path_read_string(dev->sysfs, &str, "queue/nr_zones");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_ZONE_OMAX:
ul_path_read_string(dev->sysfs, &str, "queue/max_open_zones");
if (!str)
str = xstrdup("0");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_ZONE_AMAX:
ul_path_read_string(dev->sysfs, &str, "queue/max_active_zones");
if (!str)
str = xstrdup("0");
if (sortdata)
str2u64(str, sortdata);
break;
case COL_DAX:
ul_path_read_string(dev->sysfs, &str, "queue/dax");
break;
case COL_MQ:
process_mq(dev, &str);
break;
};
return str;
}
/*
* Adds data for all wanted columns about the device to the smartcols table
*/
static void device_to_scols(
struct lsblk_device *dev,
struct lsblk_device *parent,
struct libscols_table *tab,
struct libscols_line *parent_line)
{
size_t i;
struct libscols_line *ln;
struct lsblk_iter itr;
struct lsblk_device *child = NULL;
int link_group = 0;
DBG(DEV, ul_debugobj(dev, "add '%s' to scols", dev->name));
ON_DBG(DEV, if (ul_path_isopen_dirfd(dev->sysfs)) ul_debugobj(dev, " %s ---> is open!", dev->name));
if (!parent && dev->wholedisk)
parent = dev->wholedisk;
/* Do not print device more than once on --list if tree order is not requested */
if (!(lsblk->flags & LSBLK_TREE) && !lsblk->force_tree_order && dev->is_printed)
return;
if (lsblk->merge && list_count_entries(&dev->parents) > 1) {
if (!lsblk_device_is_last_parent(dev, parent))
return;
link_group = 1;
}
ln = scols_table_new_line(tab, link_group ? NULL : parent_line);
if (!ln)
err(EXIT_FAILURE, _("failed to allocate output line"));
dev->is_printed = 1;
if (link_group) {
struct lsblk_device *p;
struct libscols_line *gr = parent_line;
/* Merge all my parents to the one group */
DBG(DEV, ul_debugobj(dev, " grouping parents [--merge]"));
lsblk_reset_iter(&itr, LSBLK_ITER_FORWARD);
while (lsblk_device_next_parent(dev, &itr, &p) == 0) {
if (!p->scols_line) {
DBG(DEV, ul_debugobj(dev, " *** ignore '%s' no scols line yet", p->name));
continue;
}
DBG(DEV, ul_debugobj(dev, " group '%s'", p->name));
scols_table_group_lines(tab, p->scols_line, gr, 0);
}
/* Link the group -- this makes group->child connection */
DBG(DEV, ul_debugobj(dev, " linking the group [--merge]"));
scols_line_link_group(ln, gr, 0);
}
/* read column specific data and set it to smartcols table line */
for (i = 0; i < ncolumns; i++) {
char *data;
int id = get_column_id(i);
if (lsblk->sort_id != id)
data = device_get_data(dev, parent, id, NULL);
else {
uint64_t sortdata = (uint64_t) -1;
data = device_get_data(dev, parent, id, &sortdata);
if (data && sortdata != (uint64_t) -1)
set_sortdata_u64(ln, i, sortdata);
}
DBG(DEV, ul_debugobj(dev, " refer data[%zu]=\"%s\"", i, data));
if (data && scols_line_refer_data(ln, i, data))
err(EXIT_FAILURE, _("failed to add output data"));
}
dev->scols_line = ln;
if (dev->npartitions == 0)
/* For partitions we often read from parental whole-disk sysfs,
* otherwise we can close */
ul_path_close_dirfd(dev->sysfs);
lsblk_reset_iter(&itr, LSBLK_ITER_FORWARD);
while (lsblk_device_next_child(dev, &itr, &child) == 0) {
DBG(DEV, ul_debugobj(dev, "%s -> continue to child", dev->name));
device_to_scols(child, dev, tab, ln);
DBG(DEV, ul_debugobj(dev, "%s <- child done", dev->name));
}
/* Let's be careful with number of open files */
ul_path_close_dirfd(dev->sysfs);
}
/*
* Walks on tree and adds one line for each device to the smartcols table
*/
static void devtree_to_scols(struct lsblk_devtree *tr, struct libscols_table *tab)
{
struct lsblk_iter itr;
struct lsblk_device *dev = NULL;
lsblk_reset_iter(&itr, LSBLK_ITER_FORWARD);
while (lsblk_devtree_next_root(tr, &itr, &dev) == 0)
device_to_scols(dev, NULL, tab, NULL);
}
static int ignore_empty(struct lsblk_device *dev)
{
/* show all non-empty devices */
if (dev->size)
return 0;
if (lsblk->noempty && dev->size == 0)
return 1;
/* ignore empty loop devices without backing file */
if (dev->maj == LOOPDEV_MAJOR &&
!loopdev_has_backing_file(dev->filename))
return 1;
return 0;
}
/*
* Reads very basic information about the device from sysfs into the device struct
*/
static int initialize_device(struct lsblk_device *dev,
struct lsblk_device *wholedisk,
const char *name)
{
dev_t devno;
DBG(DEV, ul_debugobj(dev, "initialize %s [wholedisk=%p %s]",
name, wholedisk, wholedisk ? wholedisk->name : ""));
if (sysfs_devname_is_hidden(lsblk->sysroot, name)) {
DBG(DEV, ul_debugobj(dev, "%s: hidden, ignore", name));
return -1;
}
dev->name = xstrdup(name);
if (wholedisk) {
dev->wholedisk = wholedisk;
lsblk_ref_device(wholedisk);
}
dev->filename = get_device_path(dev);
if (!dev->filename) {
DBG(DEV, ul_debugobj(dev, "%s: failed to get device path", dev->name));
return -1;
}
DBG(DEV, ul_debugobj(dev, "%s: filename=%s", dev->name, dev->filename));
devno = __sysfs_devname_to_devno(lsblk->sysroot, dev->name, wholedisk ? wholedisk->name : NULL);
if (!devno) {
DBG(DEV, ul_debugobj(dev, "%s: unknown device name", dev->name));
return -1;
}
dev->sysfs = ul_new_sysfs_path(devno, wholedisk ? wholedisk->sysfs : NULL, lsblk->sysroot);
if (!dev->sysfs) {
DBG(DEV, ul_debugobj(dev, "%s: failed to initialize sysfs handler", dev->name));
return -1;
}
dev->maj = major(devno);
dev->min = minor(devno);
dev->size = 0;
if (ul_path_read_u64(dev->sysfs, &dev->size, "size") == 0) /* in sectors */
dev->size <<= 9; /* in bytes */
/* Ignore devices of zero size */
if (!lsblk->all_devices && ignore_empty(dev)) {
DBG(DEV, ul_debugobj(dev, "zero size device -- ignore"));
return -1;
}
if (is_dm(dev->name)) {
ul_path_read_string(dev->sysfs, &dev->dm_name, "dm/name");
if (!dev->dm_name) {
DBG(DEV, ul_debugobj(dev, "%s: failed to get dm name", dev->name));
return -1;
}
}
dev->npartitions = sysfs_blkdev_count_partitions(dev->sysfs, dev->name);
dev->nholders = ul_path_count_dirents(dev->sysfs, "holders");
dev->nslaves = ul_path_count_dirents(dev->sysfs, "slaves");
DBG(DEV, ul_debugobj(dev, "%s: npartitions=%d, nholders=%d, nslaves=%d",
dev->name, dev->npartitions, dev->nholders, dev->nslaves));
/* ignore non-SCSI devices */
if (lsblk->scsi && sysfs_blkdev_scsi_get_hctl(dev->sysfs, NULL, NULL, NULL, NULL)) {
DBG(DEV, ul_debugobj(dev, "non-scsi device -- ignore"));
return -1;
}
/* ignore non-NVMe devices */
if (lsblk->nvme) {
const char *transport = get_transport(dev);
if (!transport || strcmp(transport, "nvme")) {
DBG(DEV, ul_debugobj(dev, "non-nvme device -- ignore"));
return -1;
}
}
/* ignore non-virtio devices */
if (lsblk->virtio) {
const char *transport = get_transport(dev);
if (!transport || strcmp(transport, "virtio")) {
DBG(DEV, ul_debugobj(dev, "non-virtio device -- ignore"));
return -1;
}
}
DBG(DEV, ul_debugobj(dev, "%s: context successfully initialized", dev->name));
return 0;
}
static struct lsblk_device *devtree_get_device_or_new(struct lsblk_devtree *tr,
struct lsblk_device *disk,
const char *name)
{
struct lsblk_device *dev = lsblk_devtree_get_device(tr, name);
if (!dev) {
dev = lsblk_new_device();
if (!dev)
err(EXIT_FAILURE, _("failed to allocate device"));
if (initialize_device(dev, disk, name) != 0) {
lsblk_unref_device(dev);
return NULL;
}
lsblk_devtree_add_device(tr, dev);
lsblk_unref_device(dev); /* keep it referenced by devtree only */
} else
DBG(DEV, ul_debugobj(dev, "%s: already processed", name));
return dev;
}
static struct lsblk_device *devtree_pktcdvd_get_dep(
struct lsblk_devtree *tr,
struct lsblk_device *dev,
int want_slave)
{
char buf[PATH_MAX], *name;
dev_t devno;
devno = lsblk_devtree_pktcdvd_get_mate(tr,
makedev(dev->maj, dev->min), !want_slave);
if (!devno)
return NULL;
name = sysfs_devno_to_devname(devno, buf, sizeof(buf));
if (!name)
return NULL;
return devtree_get_device_or_new(tr, NULL, name);
}
static int process_dependencies(
struct lsblk_devtree *tr,
struct lsblk_device *dev,
int do_partitions);
/*
* Read devices from whole-disk device into tree
*/
static int process_partitions(struct lsblk_devtree *tr, struct lsblk_device *disk)
{
DIR *dir;
struct dirent *d;
assert(disk);
/*
* Do not process further if there are no partitions for
* this device or the device itself is a partition.
*/
if (!disk->npartitions || device_is_partition(disk))
return -EINVAL;
DBG(DEV, ul_debugobj(disk, "%s: probe whole-disk for partitions", disk->name));
dir = ul_path_opendir(disk->sysfs, NULL);
if (!dir)
err(EXIT_FAILURE, _("failed to open device directory in sysfs"));
while ((d = xreaddir(dir))) {
struct lsblk_device *part;
if (!(sysfs_blkdev_is_partition_dirent(dir, d, disk->name)))
continue;
DBG(DEV, ul_debugobj(disk, " checking %s", d->d_name));
part = devtree_get_device_or_new(tr, disk, d->d_name);
if (!part)
continue;
if (lsblk_device_new_dependence(disk, part) == 0)
process_dependencies(tr, part, 0);
ul_path_close_dirfd(part->sysfs);
}
/* For partitions we need parental (whole-disk) sysfs directory pretty
* often, so close it now when all is done */
ul_path_close_dirfd(disk->sysfs);
DBG(DEV, ul_debugobj(disk, "probe whole-disk for partitions -- done"));
closedir(dir);
return 0;
}
static char *get_wholedisk_from_partition_dirent(DIR *dir, struct dirent *d, char *buf, size_t bufsz)
{
char *p;
int len;
if ((len = readlinkat(dirfd(dir), d->d_name, buf, bufsz - 1)) < 0)
return 0;
buf[len] = '\0';
/* The path ends with ".../<device>/<partition>" */
p = strrchr(buf, '/');
if (!p)
return NULL;
*p = '\0';
p = strrchr(buf, '/');
if (!p)
return NULL;
p++;
return p;
}
/*
* Reads slaves/holders and partitions for specified device into device tree
*/
static int process_dependencies(
struct lsblk_devtree *tr,
struct lsblk_device *dev,
int do_partitions)
{
DIR *dir;
struct dirent *d;
const char *depname;
struct lsblk_device *dep = NULL;
assert(dev);
if (lsblk->nodeps)
return 0;
/* read all or specified partition */
if (do_partitions && dev->npartitions)
process_partitions(tr, dev);
DBG(DEV, ul_debugobj(dev, "%s: reading dependencies", dev->name));
if (!(lsblk->inverse ? dev->nslaves : dev->nholders)) {
DBG(DEV, ul_debugobj(dev, " ignore (no slaves/holders)"));
goto done;
}
depname = lsblk->inverse ? "slaves" : "holders";
dir = ul_path_opendir(dev->sysfs, depname);
if (!dir) {
DBG(DEV, ul_debugobj(dev, " ignore (no slaves/holders directory)"));
goto done;
}
ul_path_close_dirfd(dev->sysfs);
DBG(DEV, ul_debugobj(dev, " %s: checking for '%s' dependence", dev->name, depname));
while ((d = xreaddir(dir))) {
struct lsblk_device *disk = NULL;
/* Is the dependency a partition? */
if (sysfs_blkdev_is_partition_dirent(dir, d, NULL)) {
char buf[PATH_MAX];
char *diskname;
DBG(DEV, ul_debugobj(dev, " %s: dependence is partition", d->d_name));
diskname = get_wholedisk_from_partition_dirent(dir, d, buf, sizeof(buf));
if (diskname)
disk = devtree_get_device_or_new(tr, NULL, diskname);
if (!disk) {
DBG(DEV, ul_debugobj(dev, " ignore no wholedisk ???"));
goto next;
}
dep = devtree_get_device_or_new(tr, disk, d->d_name);
if (!dep)
goto next;
if (lsblk_device_new_dependence(dev, dep) == 0)
process_dependencies(tr, dep, 1);
if (lsblk->inverse
&& lsblk_device_new_dependence(dep, disk) == 0)
process_dependencies(tr, disk, 0);
}
/* The dependency is a whole device. */
else {
DBG(DEV, ul_debugobj(dev, " %s: %s: dependence is whole-disk",
dev->name, d->d_name));
dep = devtree_get_device_or_new(tr, NULL, d->d_name);
if (!dep)
goto next;
if (lsblk_device_new_dependence(dev, dep) == 0)
/* For inverse tree we don't want to show partitions
* if the dependence is on whole-disk */
process_dependencies(tr, dep, lsblk->inverse ? 0 : 1);
}
next:
if (dep && dep->sysfs)
ul_path_close_dirfd(dep->sysfs);
if (disk && disk->sysfs)
ul_path_close_dirfd(disk->sysfs);
}
closedir(dir);
done:
dep = devtree_pktcdvd_get_dep(tr, dev, lsblk->inverse);
if (dep && lsblk_device_new_dependence(dev, dep) == 0) {
lsblk_devtree_remove_root(tr, dep);
process_dependencies(tr, dep, lsblk->inverse ? 0 : 1);
}
return 0;
}
/*
* Defines the device as root node in the device tree and walks on all dependencies of the device.
*/
static int __process_one_device(struct lsblk_devtree *tr, char *devname, dev_t devno)
{
struct lsblk_device *dev = NULL;
struct lsblk_device *disk = NULL;
char buf[PATH_MAX + 1], *name = NULL, *diskname = NULL;
int real_part = 0, rc = -EINVAL;
if (devno == 0 && devname) {
struct stat st;
DBG(DEV, ul_debug("%s: reading alone device", devname));
if (stat(devname, &st) || !S_ISBLK(st.st_mode)) {
warnx(_("%s: not a block device"), devname);
goto leave;
}
devno = st.st_rdev;
} else if (devno) {
DBG(DEV, ul_debug("%d:%d: reading alone device", major(devno), minor(devno)));
} else {
assert(devno || devname);
return -EINVAL;
}
/* TODO: sysfs_devno_to_devname() internally initializes path_cxt, it
* would be better to use ul_new_sysfs_path() + sysfs_blkdev_get_name()
* and reuse path_cxt for initialize_device()
*/
name = sysfs_devno_to_devname(devno, buf, sizeof(buf));
if (!name) {
if (devname)
warn(_("%s: failed to get sysfs name"), devname);
goto leave;
}
name = xstrdup(name);
if (!strncmp(name, "dm-", 3)) {
/* dm mapping is never a real partition! */
real_part = 0;
} else {
dev_t diskno = 0;
if (blkid_devno_to_wholedisk(devno, buf, sizeof(buf), &diskno)) {
warn(_("%s: failed to get whole-disk device number"), name);
goto leave;
}
diskname = buf;
real_part = devno != diskno;
}
if (!real_part) {
/*
* Device is not a partition.
*/
DBG(DEV, ul_debug(" non-partition"));
dev = devtree_get_device_or_new(tr, NULL, name);
if (!dev)
goto leave;
lsblk_devtree_add_root(tr, dev);
process_dependencies(tr, dev, !lsblk->inverse);
} else {
/*
* Partition, read sysfs name of the disk device
*/
DBG(DEV, ul_debug(" partition"));
disk = devtree_get_device_or_new(tr, NULL, diskname);
if (!disk)
goto leave;
dev = devtree_get_device_or_new(tr, disk, name);
if (!dev)
goto leave;
lsblk_devtree_add_root(tr, dev);
process_dependencies(tr, dev, 1);
if (lsblk->inverse
&& lsblk_device_new_dependence(dev, disk) == 0)
process_dependencies(tr, disk, 0);
else
ul_path_close_dirfd(disk->sysfs);
}
rc = 0;
leave:
if (dev && dev->sysfs)
ul_path_close_dirfd(dev->sysfs);
if (disk && disk->sysfs)
ul_path_close_dirfd(disk->sysfs);
free(name);
return rc;
}
static int process_one_device(struct lsblk_devtree *tr, char *devname)
{
assert(devname);
return __process_one_device(tr, devname, 0);
}
/*
* The /sys/block contains only root devices, and no partitions. It seems more
* simple to scan /sys/dev/block where are all devices without exceptions to get
* top-level devices for the reverse tree.
*/
static int process_all_devices_inverse(struct lsblk_devtree *tr)
{
DIR *dir;
struct dirent *d;
struct path_cxt *pc = ul_new_path(_PATH_SYS_DEVBLOCK);
assert(lsblk->inverse);
if (!pc)
err(EXIT_FAILURE, _("failed to allocate /sys handler"));
ul_path_set_prefix(pc, lsblk->sysroot);
dir = ul_path_opendir(pc, NULL);
if (!dir)
goto done;
DBG(DEV, ul_debug("iterate on " _PATH_SYS_DEVBLOCK));
while ((d = xreaddir(dir))) {
dev_t devno;
int maj, min;
DBG(DEV, ul_debug(" %s dentry", d->d_name));
if (sscanf(d->d_name, "%d:%d", &maj, &min) != 2)
continue;
devno = makedev(maj, min);
if (is_maj_excluded(maj) || !is_maj_included(maj))
continue;
if (ul_path_countf_dirents(pc, "%s/holders", d->d_name) != 0)
continue;
if (sysfs_devno_count_partitions(devno) != 0)
continue;
__process_one_device(tr, NULL, devno);
}
closedir(dir);
done:
ul_unref_path(pc);
DBG(DEV, ul_debug("iterate on " _PATH_SYS_DEVBLOCK " -- done"));
return 0;
}
/*
* Reads root nodes (devices) from /sys/block into devices tree
*/
static int process_all_devices(struct lsblk_devtree *tr)
{
DIR *dir;
struct dirent *d;
struct path_cxt *pc;
assert(lsblk->inverse == 0);
pc = ul_new_path(_PATH_SYS_BLOCK);
if (!pc)
err(EXIT_FAILURE, _("failed to allocate /sys handler"));
ul_path_set_prefix(pc, lsblk->sysroot);
dir = ul_path_opendir(pc, NULL);
if (!dir)
goto done;
DBG(DEV, ul_debug("iterate on " _PATH_SYS_BLOCK));
while ((d = xreaddir(dir))) {
struct lsblk_device *dev = NULL;
DBG(DEV, ul_debug(" %s dentry", d->d_name));
dev = devtree_get_device_or_new(tr, NULL, d->d_name);
if (!dev)
goto next;
/* remove unwanted devices */
if (is_maj_excluded(dev->maj) || !is_maj_included(dev->maj)) {
DBG(DEV, ul_debug(" %s: ignore (by filter)", d->d_name));
lsblk_devtree_remove_device(tr, dev);
dev = NULL;
goto next;
}
if (dev->nslaves) {
DBG(DEV, ul_debug(" %s: ignore (in-middle)", d->d_name));
goto next;
}
lsblk_devtree_add_root(tr, dev);
process_dependencies(tr, dev, 1);
next:
/* Let's be careful with number of open files */
if (dev && dev->sysfs)
ul_path_close_dirfd(dev->sysfs);
}
closedir(dir);
done:
ul_unref_path(pc);
DBG(DEV, ul_debug("iterate on " _PATH_SYS_BLOCK " -- done"));
return 0;
}
/*
* Parses major numbers as specified on lsblk command line
*/
static void parse_excludes(const char *str0)
{
const char *str = str0;
while (str && *str) {
char *end = NULL;
unsigned long n;
errno = 0;
n = strtoul(str, &end, 10);
if (end == str || (end && *end && *end != ','))
errx(EXIT_FAILURE, _("failed to parse list '%s'"), str0);
if (errno != 0 && (n == ULONG_MAX || n == 0))
err(EXIT_FAILURE, _("failed to parse list '%s'"), str0);
excludes[nexcludes++] = n;
if (nexcludes == ARRAY_SIZE(excludes))
/* TRANSLATORS: The standard value for %d is 256. */
errx(EXIT_FAILURE, _("the list of excluded devices is "
"too large (limit is %d devices)"),
(int)ARRAY_SIZE(excludes));
str = end && *end ? end + 1 : NULL;
}
}
/*
* Parses major numbers as specified on lsblk command line
* (TODO: what about refactor and merge parse_excludes() and parse_includes().)
*/
static void parse_includes(const char *str0)
{
const char *str = str0;
while (str && *str) {
char *end = NULL;
unsigned long n;
errno = 0;
n = strtoul(str, &end, 10);
if (end == str || (end && *end && *end != ','))
errx(EXIT_FAILURE, _("failed to parse list '%s'"), str0);
if (errno != 0 && (n == ULONG_MAX || n == 0))
err(EXIT_FAILURE, _("failed to parse list '%s'"), str0);
includes[nincludes++] = n;
if (nincludes == ARRAY_SIZE(includes))
/* TRANSLATORS: The standard value for %d is 256. */
errx(EXIT_FAILURE, _("the list of included devices is "
"too large (limit is %d devices)"),
(int)ARRAY_SIZE(includes));
str = end && *end ? end + 1 : NULL;
}
}
/*
* see set_sortdata_u64() and columns initialization in main()
*/
static int cmp_u64_cells(struct libscols_cell *a,
struct libscols_cell *b,
__attribute__((__unused__)) void *data)
{
uint64_t *adata = (uint64_t *) scols_cell_get_userdata(a),
*bdata = (uint64_t *) scols_cell_get_userdata(b);
if (adata == NULL && bdata == NULL)
return 0;
if (adata == NULL)
return -1;
if (bdata == NULL)
return 1;
return *adata == *bdata ? 0 : *adata >= *bdata ? 1 : -1;
}
static void device_set_dedupkey(
struct lsblk_device *dev,
struct lsblk_device *parent,
int id)
{
struct lsblk_iter itr;
struct lsblk_device *child = NULL;
dev->dedupkey = device_get_data(dev, parent, id, NULL);
if (dev->dedupkey)
DBG(DEV, ul_debugobj(dev, "%s: de-duplication key: %s", dev->name, dev->dedupkey));
if (dev->npartitions == 0)
/* For partitions we often read from parental whole-disk sysfs,
* otherwise we can close */
ul_path_close_dirfd(dev->sysfs);
lsblk_reset_iter(&itr, LSBLK_ITER_FORWARD);
while (lsblk_device_next_child(dev, &itr, &child) == 0)
device_set_dedupkey(child, dev, id);
/* Let's be careful with number of open files */
ul_path_close_dirfd(dev->sysfs);
}
static void devtree_set_dedupkeys(struct lsblk_devtree *tr, int id)
{
struct lsblk_iter itr;
struct lsblk_device *dev = NULL;
lsblk_reset_iter(&itr, LSBLK_ITER_FORWARD);
while (lsblk_devtree_next_root(tr, &itr, &dev) == 0)
device_set_dedupkey(dev, NULL, id);
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
size_t i;
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options] [<device> ...]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("List information about block devices.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -A, --noempty don't print empty devices\n"), out);
fputs(_(" -D, --discard print discard capabilities\n"), out);
fputs(_(" -E, --dedup <column> de-duplicate output by <column>\n"), out);
fputs(_(" -I, --include <list> show only devices with specified major numbers\n"), out);
fputs(_(" -J, --json use JSON output format\n"), out);
fputs(_(" -M, --merge group parents of sub-trees (usable for RAIDs, Multi-path)\n"), out);
fputs(_(" -O, --output-all output all columns\n"), out);
fputs(_(" -P, --pairs use key=\"value\" output format\n"), out);
fputs(_(" -S, --scsi output info about SCSI devices\n"), out);
fputs(_(" -N, --nvme output info about NVMe devices\n"), out);
fputs(_(" -v, --virtio output info about virtio devices\n"), out);
fputs(_(" -T, --tree[=<column>] use tree format output\n"), out);
fputs(_(" -a, --all print all devices\n"), out);
fputs(_(" -b, --bytes print SIZE in bytes rather than in human readable format\n"), out);
fputs(_(" -d, --nodeps don't print slaves or holders\n"), out);
fputs(_(" -e, --exclude <list> exclude devices by major number (default: RAM disks)\n"), out);
fputs(_(" -f, --fs output info about filesystems\n"), out);
fputs(_(" -i, --ascii use ascii characters only\n"), out);
fputs(_(" -l, --list use list format output\n"), out);
fputs(_(" -m, --perms output info about permissions\n"), out);
fputs(_(" -n, --noheadings don't print headings\n"), out);
fputs(_(" -o, --output <list> output columns\n"), out);
fputs(_(" -p, --paths print complete device path\n"), out);
fputs(_(" -r, --raw use raw output format\n"), out);
fputs(_(" -s, --inverse inverse dependencies\n"), out);
fputs(_(" -t, --topology output info about topology\n"), out);
fputs(_(" -w, --width <num> specifies output width as number of characters\n"), out);
fputs(_(" -x, --sort <column> sort output by <column>\n"), out);
fputs(_(" -y, --shell use column names to be usable as shell variable identifiers\n"), out);
fputs(_(" -z, --zoned print zone related information\n"), out);
fputs(_(" --sysroot <dir> use specified directory as system root\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(22));
fprintf(out, USAGE_COLUMNS);
for (i = 0; i < ARRAY_SIZE(infos); i++)
fprintf(out, " %12s %s\n", infos[i].name, _(infos[i].help));
printf(USAGE_MAN_TAIL("lsblk(8)"));
exit(EXIT_SUCCESS);
}
static void check_sysdevblock(void)
{
if (access(_PATH_SYS_DEVBLOCK, R_OK) != 0)
err(EXIT_FAILURE, _("failed to access sysfs directory: %s"),
_PATH_SYS_DEVBLOCK);
}
int main(int argc, char *argv[])
{
struct lsblk _ls = {
.sort_id = -1,
.dedup_id = -1,
.flags = LSBLK_TREE,
.tree_id = COL_NAME
};
struct lsblk_devtree *tr = NULL;
int c, status = EXIT_FAILURE;
char *outarg = NULL;
size_t i;
unsigned int width = 0;
int force_tree = 0, has_tree_col = 0;
enum {
OPT_SYSROOT = CHAR_MAX + 1
};
static const struct option longopts[] = {
{ "all", no_argument, NULL, 'a' },
{ "bytes", no_argument, NULL, 'b' },
{ "nodeps", no_argument, NULL, 'd' },
{ "noempty", no_argument, NULL, 'A' },
{ "discard", no_argument, NULL, 'D' },
{ "dedup", required_argument, NULL, 'E' },
{ "zoned", no_argument, NULL, 'z' },
{ "help", no_argument, NULL, 'h' },
{ "json", no_argument, NULL, 'J' },
{ "output", required_argument, NULL, 'o' },
{ "output-all", no_argument, NULL, 'O' },
{ "merge", no_argument, NULL, 'M' },
{ "perms", no_argument, NULL, 'm' },
{ "noheadings", no_argument, NULL, 'n' },
{ "list", no_argument, NULL, 'l' },
{ "ascii", no_argument, NULL, 'i' },
{ "raw", no_argument, NULL, 'r' },
{ "inverse", no_argument, NULL, 's' },
{ "fs", no_argument, NULL, 'f' },
{ "exclude", required_argument, NULL, 'e' },
{ "include", required_argument, NULL, 'I' },
{ "topology", no_argument, NULL, 't' },
{ "paths", no_argument, NULL, 'p' },
{ "pairs", no_argument, NULL, 'P' },
{ "scsi", no_argument, NULL, 'S' },
{ "nvme", no_argument, NULL, 'N' },
{ "virtio", no_argument, NULL, 'v' },
{ "sort", required_argument, NULL, 'x' },
{ "sysroot", required_argument, NULL, OPT_SYSROOT },
{ "shell", no_argument, NULL, 'y' },
{ "tree", optional_argument, NULL, 'T' },
{ "version", no_argument, NULL, 'V' },
{ "width", required_argument, NULL, 'w' },
{ NULL, 0, NULL, 0 },
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'D','O' },
{ 'I','e' },
{ 'J', 'P', 'r' },
{ 'O','S' },
{ 'O','f' },
{ 'O','m' },
{ 'O','o' },
{ 'O','t' },
{ 'P','T', 'l','r' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
lsblk = &_ls;
lsblk_init_debug();
while((c = getopt_long(argc, argv,
"AabdDzE:e:fhJlNnMmo:OpPiI:rstVvST::w:x:y",
longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch(c) {
case 'A':
lsblk->noempty = 1;
break;
case 'a':
lsblk->all_devices = 1;
break;
case 'b':
lsblk->bytes = 1;
break;
case 'd':
lsblk->nodeps = 1;
break;
case 'D':
add_uniq_column(COL_NAME);
add_uniq_column(COL_DALIGN);
add_uniq_column(COL_DGRAN);
add_uniq_column(COL_DMAX);
add_uniq_column(COL_DZERO);
break;
case 'z':
add_uniq_column(COL_NAME);
add_uniq_column(COL_ZONED);
add_uniq_column(COL_ZONE_SZ);
add_uniq_column(COL_ZONE_NR);
add_uniq_column(COL_ZONE_AMAX);
add_uniq_column(COL_ZONE_OMAX);
add_uniq_column(COL_ZONE_APP);
add_uniq_column(COL_ZONE_WGRAN);
break;
case 'e':
parse_excludes(optarg);
break;
case 'J':
lsblk->flags |= LSBLK_JSON;
break;
case 'l':
lsblk->flags &= ~LSBLK_TREE; /* disable the default */
break;
case 'M':
lsblk->merge = 1;
break;
case 'n':
lsblk->flags |= LSBLK_NOHEADINGS;
break;
case 'o':
outarg = optarg;
break;
case 'O':
for (ncolumns = 0 ; ncolumns < ARRAY_SIZE(infos); ncolumns++)
columns[ncolumns] = ncolumns;
break;
case 'p':
lsblk->paths = 1;
break;
case 'P':
lsblk->flags |= LSBLK_EXPORT;
lsblk->flags &= ~LSBLK_TREE; /* disable the default */
break;
case 'y':
lsblk->flags |= LSBLK_SHELLVAR;
break;
case 'i':
lsblk->flags |= LSBLK_ASCII;
break;
case 'I':
parse_includes(optarg);
break;
case 'r':
lsblk->flags &= ~LSBLK_TREE; /* disable the default */
lsblk->flags |= LSBLK_RAW; /* enable raw */
break;
case 's':
lsblk->inverse = 1;
break;
case 'f':
add_uniq_column(COL_NAME);
add_uniq_column(COL_FSTYPE);
add_uniq_column(COL_FSVERSION);
add_uniq_column(COL_LABEL);
add_uniq_column(COL_UUID);
add_uniq_column(COL_FSAVAIL);
add_uniq_column(COL_FSUSEPERC);
add_uniq_column(COL_TARGETS);
break;
case 'm':
add_uniq_column(COL_NAME);
add_uniq_column(COL_SIZE);
add_uniq_column(COL_OWNER);
add_uniq_column(COL_GROUP);
add_uniq_column(COL_MODE);
break;
case 't':
add_uniq_column(COL_NAME);
add_uniq_column(COL_ALIOFF);
add_uniq_column(COL_MINIO);
add_uniq_column(COL_OPTIO);
add_uniq_column(COL_PHYSEC);
add_uniq_column(COL_LOGSEC);
add_uniq_column(COL_ROTA);
add_uniq_column(COL_SCHED);
add_uniq_column(COL_RQ_SIZE);
add_uniq_column(COL_RA);
add_uniq_column(COL_WSAME);
break;
case 'S':
lsblk->nodeps = 1;
lsblk->scsi = 1;
add_uniq_column(COL_NAME);
add_uniq_column(COL_HCTL);
add_uniq_column(COL_TYPE);
add_uniq_column(COL_VENDOR);
add_uniq_column(COL_MODEL);
add_uniq_column(COL_REV);
add_uniq_column(COL_SERIAL);
add_uniq_column(COL_TRANSPORT);
break;
case 'N':
lsblk->nodeps = 1;
lsblk->nvme = 1;
add_uniq_column(COL_NAME);
add_uniq_column(COL_TYPE);
add_uniq_column(COL_MODEL);
add_uniq_column(COL_SERIAL);
add_uniq_column(COL_TRANSPORT);
add_uniq_column(COL_RQ_SIZE);
add_uniq_column(COL_MQ);
break;
case 'v':
lsblk->nodeps = 1;
lsblk->virtio = 1;
add_uniq_column(COL_NAME);
add_uniq_column(COL_TYPE);