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util-linux/misc-utils/lsblk.c

1977 lines
50 KiB

/*
* lsblk(8) - list block devices
*
* Copyright (C) 2010,2011,2012 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 <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <stdarg.h>
#include <locale.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <blkid.h>
#include <libmount.h>
#include <libsmartcols.h>
#ifdef HAVE_LIBUDEV
#include <libudev.h>
#endif
#include <assert.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 "mangle.h"
#include "optutils.h"
#include "debug.h"
static UL_DEBUG_DEFINE_MASK(lsblk);
UL_DEBUG_DEFINE_MASKNAMES(lsblk) = UL_DEBUG_EMPTY_MASKNAMES;
#define LSBLK_DEBUG_INIT (1 << 1)
#define LSBLK_DEBUG_FILTER (1 << 2)
#define LSBLK_DEBUG_DEV (1 << 3)
#define LSBLK_DEBUG_CXT (1 << 4)
#define LSBLK_DEBUG_ALL 0xFFFF
#define DBG(m, x) __UL_DBG(lsblk, LSBLK_DEBUG_, m, x)
#define ON_DBG(m, x) __UL_DBG_CALL(lsblk, LSBLK_DEBUG_, m, x)
#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(lsblk)
#include "debugobj.h"
#define LSBLK_EXIT_SOMEOK 64
#define LSBLK_EXIT_ALLFAILED 32
static int column_id_to_number(int id);
/* column IDs */
enum {
COL_NAME = 0,
COL_KNAME,
COL_MAJMIN,
COL_FSTYPE,
COL_TARGET,
COL_LABEL,
COL_UUID,
COL_PARTTYPE,
COL_PARTLABEL,
COL_PARTUUID,
COL_PARTFLAGS,
COL_RA,
COL_RO,
COL_RM,
COL_HOTPLUG,
COL_MODEL,
COL_SERIAL,
COL_SIZE,
COL_STATE,
COL_OWNER,
COL_GROUP,
COL_MODE,
COL_ALIOFF,
COL_MINIO,
COL_OPTIO,
COL_PHYSEC,
COL_LOGSEC,
COL_ROTA,
COL_SCHED,
COL_RQ_SIZE,
COL_TYPE,
COL_DALIGN,
COL_DGRAN,
COL_DMAX,
COL_DZERO,
COL_WSAME,
COL_WWN,
COL_RAND,
COL_PKNAME,
COL_HCTL,
COL_TRANSPORT,
COL_SUBSYS,
COL_REV,
COL_VENDOR,
COL_ZONED,
};
/* 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),
};
enum {
SORT_STRING = 0, /* default is to use scols_cell_get_data() */
SORT_U64 = 1 /* use private pointer from scols_cell_get_userdata() */
};
/* 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 sort_type; /* SORT_* */
};
/* columns descriptions */
static struct colinfo infos[] = {
[COL_NAME] = { "NAME", 0.25, SCOLS_FL_TREE | SCOLS_FL_NOEXTREMES, N_("device name") },
[COL_KNAME] = { "KNAME", 0.3, 0, N_("internal kernel device name") },
[COL_PKNAME] = { "PKNAME", 0.3, 0, N_("internal parent kernel device name") },
[COL_MAJMIN] = { "MAJ:MIN", 6, 0, N_("major:minor device number"), SORT_U64 },
[COL_FSTYPE] = { "FSTYPE", 0.1, SCOLS_FL_TRUNC, N_("filesystem type") },
[COL_TARGET] = { "MOUNTPOINT", 0.10, SCOLS_FL_TRUNC, N_("where the device is mounted") },
[COL_LABEL] = { "LABEL", 0.1, 0, N_("filesystem LABEL") },
[COL_UUID] = { "UUID", 36, 0, N_("filesystem UUID") },
[COL_PARTTYPE] = { "PARTTYPE", 36, 0, N_("partition type UUID") },
[COL_PARTLABEL] = { "PARTLABEL", 0.1, 0, N_("partition LABEL") },
[COL_PARTUUID] = { "PARTUUID", 36, 0, N_("partition UUID") },
[COL_PARTFLAGS] = { "PARTFLAGS", 36, 0, N_("partition flags") },
[COL_RA] = { "RA", 3, SCOLS_FL_RIGHT, N_("read-ahead of the device"), SORT_U64 },
[COL_RO] = { "RO", 1, SCOLS_FL_RIGHT, N_("read-only device") },
[COL_RM] = { "RM", 1, SCOLS_FL_RIGHT, N_("removable device") },
[COL_HOTPLUG]= { "HOTPLUG", 1, SCOLS_FL_RIGHT, N_("removable or hotplug device (usb, pcmcia, ...)") },
[COL_ROTA] = { "ROTA", 1, SCOLS_FL_RIGHT, N_("rotational device") },
[COL_RAND] = { "RAND", 1, SCOLS_FL_RIGHT, N_("adds randomness") },
[COL_MODEL] = { "MODEL", 0.1, SCOLS_FL_TRUNC, N_("device identifier") },
[COL_SERIAL] = { "SERIAL", 0.1, SCOLS_FL_TRUNC, N_("disk serial number") },
[COL_SIZE] = { "SIZE", 5, SCOLS_FL_RIGHT, N_("size of the device"), SORT_U64 },
[COL_STATE] = { "STATE", 7, SCOLS_FL_TRUNC, N_("state of the device") },
[COL_OWNER] = { "OWNER", 0.1, SCOLS_FL_TRUNC, N_("user name"), },
[COL_GROUP] = { "GROUP", 0.1, SCOLS_FL_TRUNC, N_("group name") },
[COL_MODE] = { "MODE", 10, 0, N_("device node permissions") },
[COL_ALIOFF] = { "ALIGNMENT", 6, SCOLS_FL_RIGHT, N_("alignment offset"), SORT_U64 },
[COL_MINIO] = { "MIN-IO", 6, SCOLS_FL_RIGHT, N_("minimum I/O size"), SORT_U64 },
[COL_OPTIO] = { "OPT-IO", 6, SCOLS_FL_RIGHT, N_("optimal I/O size"), SORT_U64 },
[COL_PHYSEC] = { "PHY-SEC", 7, SCOLS_FL_RIGHT, N_("physical sector size"), SORT_U64 },
[COL_LOGSEC] = { "LOG-SEC", 7, SCOLS_FL_RIGHT, N_("logical sector size"), SORT_U64 },
[COL_SCHED] = { "SCHED", 0.1, 0, N_("I/O scheduler name") },
[COL_RQ_SIZE]= { "RQ-SIZE", 5, SCOLS_FL_RIGHT, N_("request queue size"), SORT_U64 },
[COL_TYPE] = { "TYPE", 4, 0, N_("device type") },
[COL_DALIGN] = { "DISC-ALN", 6, SCOLS_FL_RIGHT, N_("discard alignment offset"), SORT_U64 },
[COL_DGRAN] = { "DISC-GRAN", 6, SCOLS_FL_RIGHT, N_("discard granularity"), SORT_U64 },
[COL_DMAX] = { "DISC-MAX", 6, SCOLS_FL_RIGHT, N_("discard max bytes"), SORT_U64 },
[COL_DZERO] = { "DISC-ZERO", 1, SCOLS_FL_RIGHT, N_("discard zeroes data") },
[COL_WSAME] = { "WSAME", 6, SCOLS_FL_RIGHT, N_("write same max bytes"), SORT_U64 },
[COL_WWN] = { "WWN", 18, 0, N_("unique storage identifier") },
[COL_HCTL] = { "HCTL", 10, 0, N_("Host:Channel:Target:Lun for SCSI") },
[COL_TRANSPORT] = { "TRAN", 6, 0, N_("device transport type") },
[COL_SUBSYS] = { "SUBSYSTEMS", 0.1, SCOLS_FL_NOEXTREMES, N_("de-duplicated chain of subsystems") },
[COL_REV] = { "REV", 4, SCOLS_FL_RIGHT, N_("device revision") },
[COL_VENDOR] = { "VENDOR", 0.1, SCOLS_FL_TRUNC, N_("device vendor") },
[COL_ZONED] = { "ZONED", 0.3, 0, N_("zone model") },
};
struct lsblk {
struct libscols_table *table; /* output table */
struct libscols_column *sort_col;/* sort output by this column */
int sort_id;
int flags; /* LSBLK_* */
unsigned int all_devices:1; /* print all devices, including empty */
unsigned int bytes:1; /* print SIZE in bytes */
unsigned int inverse:1; /* print inverse dependencies */
unsigned int nodeps:1; /* don't print slaves/holders */
unsigned int scsi:1; /* print only device with HCTL (SCSI) */
unsigned int paths:1; /* print devnames with "/dev" prefix */
unsigned int sort_hidden:1; /* sort column not between output columns */
unsigned int force_tree_order:1;/* sort lines by parent->tree relation */
};
static 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 int excludes[256];
static size_t nexcludes;
static int includes[256];
static size_t nincludes;
static struct libmnt_table *mtab, *swaps;
static struct libmnt_cache *mntcache;
#ifdef HAVE_LIBUDEV
static struct udev *udev;
#endif
struct blkdev_cxt {
struct blkdev_cxt *parent;
struct libscols_line *scols_line;
struct stat st;
char *name; /* kernel name in /sys/block */
char *dm_name; /* DM name (dm/block) */
char *filename; /* path to device node */
struct sysfs_cxt sysfs;
int partition; /* is partition? TRUE/FALSE */
int probed; /* already probed */
char *fstype; /* detected fs, NULL or "?" if cannot detect */
char *uuid; /* filesystem UUID (or stack uuid) */
char *label; /* filesystem label */
char *parttype; /* partition type UUID */
char *partuuid; /* partition UUID */
char *partlabel; /* partition label */
char *partflags; /* partition flags */
char *wwn; /* storage WWN */
char *serial; /* disk serial number */
int npartitions; /* # of partitions this device has */
int nholders; /* # of devices mapped directly to this device
* /sys/block/.../holders */
int nslaves; /* # of devices this device maps to */
int maj, min; /* devno */
int discard; /* supports discard */
uint64_t size; /* device size */
};
static void lsblk_init_debug(void)
{
__UL_INIT_DEBUG_FROM_ENV(lsblk, LSBLK_DEBUG_, 0, LSBLK_DEBUG);
}
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;
}
/* array with IDs of enabled columns */
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];
}
static struct colinfo *get_column_info(int num)
{
return &infos[ get_column_id(num) ];
}
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;
}
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;
}
static void reset_blkdev_cxt(struct blkdev_cxt *cxt)
{
if (!cxt)
return;
DBG(CXT, ul_debugobj(cxt, "reset"));
free(cxt->name);
free(cxt->dm_name);
free(cxt->filename);
free(cxt->fstype);
free(cxt->uuid);
free(cxt->label);
free(cxt->parttype);
free(cxt->partuuid);
free(cxt->partlabel);
free(cxt->wwn);
free(cxt->serial);
sysfs_deinit(&cxt->sysfs);
memset(cxt, 0, sizeof(*cxt));
}
static int is_dm(const char *name)
{
return strncmp(name, "dm-", 3) ? 0 : 1;
}
static struct dirent *xreaddir(DIR *dp)
{
struct dirent *d;
assert(dp);
while ((d = readdir(dp))) {
if (!strcmp(d->d_name, ".") ||
!strcmp(d->d_name, ".."))
continue;
/* blacklist here? */
break;
}
return d;
}
static char *get_device_path(struct blkdev_cxt *cxt)
{
char path[PATH_MAX];
assert(cxt);
assert(cxt->name);
if (is_dm(cxt->name))
return canonicalize_dm_name(cxt->name);
snprintf(path, sizeof(path), "/dev/%s", cxt->name);
sysfs_devname_sys_to_dev(path);
return xstrdup(path);
}
static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
const char *filename, int line)
{
if (filename)
warnx(_("%s: parse error at line %d -- ignored"), filename, line);
return 1;
}
static int is_active_swap(const char *filename)
{
if (!swaps) {
swaps = mnt_new_table();
if (!swaps)
return 0;
if (!mntcache)
mntcache = mnt_new_cache();
mnt_table_set_parser_errcb(swaps, table_parser_errcb);
mnt_table_set_cache(swaps, mntcache);
mnt_table_parse_swaps(swaps, NULL);
}
return mnt_table_find_srcpath(swaps, filename, MNT_ITER_BACKWARD) != NULL;
}
static char *get_device_mountpoint(struct blkdev_cxt *cxt)
{
struct libmnt_fs *fs;
const char *fsroot;
assert(cxt);
assert(cxt->filename);
if (!mtab) {
mtab = mnt_new_table();
if (!mtab)
return NULL;
if (!mntcache)
mntcache = mnt_new_cache();
mnt_table_set_parser_errcb(mtab, table_parser_errcb);
mnt_table_set_cache(mtab, mntcache);
mnt_table_parse_mtab(mtab, NULL);
}
/* Note that maj:min in /proc/self/mountinfo does not have to match with
* devno as returned by stat(), so we have to try devname too
*/
fs = mnt_table_find_devno(mtab, makedev(cxt->maj, cxt->min), MNT_ITER_BACKWARD);
if (!fs)
fs = mnt_table_find_srcpath(mtab, cxt->filename, MNT_ITER_BACKWARD);
if (!fs)
return is_active_swap(cxt->filename) ? xstrdup("[SWAP]") : NULL;
/* found */
fsroot = mnt_fs_get_root(fs);
if (fsroot && strcmp(fsroot, "/") != 0) {
/* hmm.. we found bind mount or btrfs subvolume, let's try to
* get real FS root mountpoint */
struct libmnt_fs *rfs;
struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_BACKWARD);
mnt_table_set_iter(mtab, itr, fs);
while (mnt_table_next_fs(mtab, itr, &rfs) == 0) {
fsroot = mnt_fs_get_root(rfs);
if ((!fsroot || strcmp(fsroot, "/") == 0)
&& mnt_fs_match_source(rfs, cxt->filename, mntcache)) {
fs = rfs;
break;
}
}
mnt_free_iter(itr);
}
DBG(DEV, ul_debugobj(cxt, "mountpoint: %s", mnt_fs_get_target(fs)));
return xstrdup(mnt_fs_get_target(fs));
}
#ifndef HAVE_LIBUDEV
static int get_udev_properties(struct blkdev_cxt *cxt
__attribute__((__unused__)))
{
return -1;
}
#else
static int get_udev_properties(struct blkdev_cxt *cxt)
{
struct udev_device *dev;
if (cxt->probed)
return 0; /* already done */
if (!udev)
udev = udev_new();
if (!udev)
return -1;
dev = udev_device_new_from_subsystem_sysname(udev, "block", cxt->name);
if (dev) {
const char *data;
if ((data = udev_device_get_property_value(dev, "ID_FS_LABEL_ENC"))) {
cxt->label = xstrdup(data);
unhexmangle_string(cxt->label);
}
if ((data = udev_device_get_property_value(dev, "ID_FS_UUID_ENC"))) {
cxt->uuid = xstrdup(data);
unhexmangle_string(cxt->uuid);
}
if ((data = udev_device_get_property_value(dev, "ID_PART_ENTRY_NAME"))) {
cxt->partlabel = xstrdup(data);
unhexmangle_string(cxt->partlabel);
}
if ((data = udev_device_get_property_value(dev, "ID_FS_TYPE")))
cxt->fstype = xstrdup(data);
if ((data = udev_device_get_property_value(dev, "ID_PART_ENTRY_TYPE")))
cxt->parttype = xstrdup(data);
if ((data = udev_device_get_property_value(dev, "ID_PART_ENTRY_UUID")))
cxt->partuuid = xstrdup(data);
if ((data = udev_device_get_property_value(dev, "ID_PART_ENTRY_FLAGS")))
cxt->partflags = xstrdup(data);
data = udev_device_get_property_value(dev, "ID_WWN_WITH_EXTENSION");
if (!data)
data = udev_device_get_property_value(dev, "ID_WWN");
if (data)
cxt->wwn = xstrdup(data);
if ((data = udev_device_get_property_value(dev, "ID_SERIAL_SHORT")))
cxt->serial = xstrdup(data);
udev_device_unref(dev);
cxt->probed = 1;
DBG(DEV, ul_debugobj(cxt, "%s: found udev properties", cxt->name));
}
return cxt->probed == 1 ? 0 : -1;
}
#endif /* HAVE_LIBUDEV */
static void probe_device(struct blkdev_cxt *cxt)
{
blkid_probe pr = NULL;
if (cxt->probed)
return;
if (!cxt->size)
return;
/* try udev DB */
if (get_udev_properties(cxt) == 0)
return; /* success */
cxt->probed = 1;
/* try libblkid (fallback) */
if (getuid() != 0)
return; /* no permissions to read from the device */
pr = blkid_new_probe_from_filename(cxt->filename);
if (!pr)
return;
blkid_probe_enable_superblocks(pr, 1);
blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_LABEL |
BLKID_SUBLKS_UUID |
BLKID_SUBLKS_TYPE);
blkid_probe_enable_partitions(pr, 1);
blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
if (!blkid_do_safeprobe(pr)) {
const char *data = NULL;
if (!blkid_probe_lookup_value(pr, "TYPE", &data, NULL))
cxt->fstype = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "UUID", &data, NULL))
cxt->uuid = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "LABEL", &data, NULL))
cxt->label = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "PART_ENTRY_TYPE", &data, NULL))
cxt->parttype = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "PART_ENTRY_UUID", &data, NULL))
cxt->partuuid = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "PART_ENTRY_NAME", &data, NULL))
cxt->partlabel = xstrdup(data);
if (!blkid_probe_lookup_value(pr, "PART_ENTRY_FLAGS", &data, NULL))
cxt->partflags = xstrdup(data);
DBG(DEV, ul_debugobj(cxt, "%s: found blkid properties", cxt->name));
}
blkid_free_probe(pr);
return;
}
static int is_readonly_device(struct blkdev_cxt *cxt)
{
int fd, ro = 0;
if (sysfs_scanf(&cxt->sysfs, "ro", "%d", &ro) == 1)
return ro;
/* fallback if "ro" attribute does not exist */
fd = open(cxt->filename, O_RDONLY);
if (fd != -1) {
if (ioctl(fd, BLKROGET, &ro) != 0)
ro = 0;
close(fd);
}
return ro;
}
static char *get_scheduler(struct blkdev_cxt *cxt)
{
char *str = sysfs_strdup(&cxt->sysfs, "queue/scheduler");
char *p, *res = NULL;
if (!str)
return NULL;
p = strchr(str, '[');
if (p) {
res = p + 1;
p = strchr(res, ']');
if (p) {
*p = '\0';
res = xstrdup(res);
} else
res = NULL;
}
free(str);
return res;
}
static char *get_type(struct blkdev_cxt *cxt)
{
char *res = NULL, *p;
if (is_dm(cxt->name)) {
char *dm_uuid = sysfs_strdup(&cxt->sysfs, "dm/uuid");
/* The DM_UUID prefix should be set to subsystem owning
* the device - LVM, CRYPT, DMRAID, MPATH, PART */
if (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(cxt->name, "loop", 4)) {
res = xstrdup("loop");
} else if (!strncmp(cxt->name, "md", 2)) {
char *md_level = sysfs_strdup(&cxt->sysfs, "md/level");
res = md_level ? md_level : xstrdup("md");
} else {
const char *type = NULL;
int x = 0;
if (!sysfs_read_int(&cxt->sysfs, "device/type", &x))
type = blkdev_scsi_type_to_name(x);
if (!type)
type = cxt->partition ? "part" : "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 char *get_transport(struct blkdev_cxt *cxt)
{
struct sysfs_cxt *sysfs = &cxt->sysfs;
char *attr = NULL;
const char *trans = NULL;
/* SCSI - Serial Peripheral Interface */
if (sysfs_scsi_host_is(sysfs, "spi"))
trans = "spi";
/* FC/FCoE - Fibre Channel / Fibre Channel over Ethernet */
else if (sysfs_scsi_host_is(sysfs, "fc")) {
attr = sysfs_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_scsi_host_is(sysfs, "sas") ||
sysfs_scsi_has_attribute(sysfs, "sas_device"))
trans = "sas";
/* SBP - Serial Bus Protocol (FireWire) */
else if (sysfs_scsi_has_attribute(sysfs, "ieee1394_id"))
trans = "sbp";
/* iSCSI */
else if (sysfs_scsi_host_is(sysfs, "iscsi"))
trans ="iscsi";
/* USB - Universal Serial Bus */
else if (sysfs_scsi_path_contains(sysfs, "usb"))
trans = "usb";
/* ATA, SATA */
else if (sysfs_scsi_host_is(sysfs, "scsi")) {
attr = sysfs_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(cxt->name, "nvme", 4) == 0)
trans = "nvme";
return trans ? xstrdup(trans) : NULL;
}
static char *get_subsystems(struct blkdev_cxt *cxt)
{
char path[PATH_MAX];
char *sub, *chain, *res = NULL;
size_t len = 0, last = 0;
chain = sysfs_get_devchain(&cxt->sysfs, path, sizeof(path));
if (!chain)
return NULL;
while (sysfs_next_subsystem(&cxt->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);
}
static void set_sortdata_u64_from_string(struct libscols_line *ln, int col, const char *str)
{
uint64_t x;
if (!str || sscanf(str, "%"SCNu64, &x) != 1)
return;
set_sortdata_u64(ln, col, x);
}
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 void set_scols_data(struct blkdev_cxt *cxt, int col, int id, struct libscols_line *ln)
{
int sort = 0, st_rc = 0;
char *str = NULL;
if (!cxt->st.st_rdev && (id == COL_OWNER || id == COL_GROUP ||
id == COL_MODE))
st_rc = stat(cxt->filename, &cxt->st);
if (lsblk->sort_id == id)
sort = 1;
switch(id) {
case COL_NAME:
str = cxt->dm_name ? mk_dm_name(cxt->dm_name) : mk_name(cxt->name);
break;
case COL_KNAME:
str = mk_name(cxt->name);
break;
case COL_PKNAME:
if (cxt->parent)
str = mk_name(cxt->parent->name);
break;
case COL_OWNER:
{
struct passwd *pw = st_rc ? NULL : getpwuid(cxt->st.st_uid);
if (pw)
str = xstrdup(pw->pw_name);
break;
}
case COL_GROUP:
{
struct group *gr = st_rc ? NULL : getgrgid(cxt->st.st_gid);
if (gr)
str = xstrdup(gr->gr_name);
break;
}
case COL_MODE:
{
char md[11];
if (!st_rc) {
xstrmode(cxt->st.st_mode, md);
str = xstrdup(md);
}
break;
}
case COL_MAJMIN:
if (is_parsable(lsblk))
xasprintf(&str, "%u:%u", cxt->maj, cxt->min);
else
xasprintf(&str, "%3u:%-3u", cxt->maj, cxt->min);
if (sort)
set_sortdata_u64(ln, col, makedev(cxt->maj, cxt->min));
break;
case COL_FSTYPE:
probe_device(cxt);
if (cxt->fstype)
str = xstrdup(cxt->fstype);
break;
case COL_TARGET:
str = get_device_mountpoint(cxt);
break;
case COL_LABEL:
probe_device(cxt);
if (cxt->label)
str = xstrdup(cxt->label);
break;
case COL_UUID:
probe_device(cxt);
if (cxt->uuid)
str = xstrdup(cxt->uuid);
break;
case COL_PARTTYPE:
probe_device(cxt);
if (cxt->parttype)
str = xstrdup(cxt->parttype);
break;
case COL_PARTLABEL:
probe_device(cxt);
if (cxt->partlabel)
str = xstrdup(cxt->partlabel);
break;
case COL_PARTUUID:
probe_device(cxt);
if (cxt->partuuid)
str = xstrdup(cxt->partuuid);
break;
case COL_PARTFLAGS:
probe_device(cxt);
if (cxt->partflags)
str = xstrdup(cxt->partflags);
break;
case COL_WWN:
get_udev_properties(cxt);
if (cxt->wwn)
str = xstrdup(cxt->wwn);
break;
case COL_RA:
str = sysfs_strdup(&cxt->sysfs, "queue/read_ahead_kb");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_RO:
str = xstrdup(is_readonly_device(cxt) ? "1" : "0");
break;
case COL_RM:
str = sysfs_strdup(&cxt->sysfs, "removable");
if (!str && cxt->sysfs.parent)
str = sysfs_strdup(cxt->sysfs.parent, "removable");
break;
case COL_HOTPLUG:
str = sysfs_is_hotpluggable(&cxt->sysfs) ? xstrdup("1") : xstrdup("0");
break;
case COL_ROTA:
str = sysfs_strdup(&cxt->sysfs, "queue/rotational");
break;
case COL_RAND:
str = sysfs_strdup(&cxt->sysfs, "queue/add_random");
break;
case COL_MODEL:
if (!cxt->partition && cxt->nslaves == 0)
str = sysfs_strdup(&cxt->sysfs, "device/model");
break;
case COL_SERIAL:
if (!cxt->partition && cxt->nslaves == 0) {
get_udev_properties(cxt);
if (cxt->serial)
str = xstrdup(cxt->serial);
else
str = sysfs_strdup(&cxt->sysfs, "device/serial");
}
break;
case COL_REV:
if (!cxt->partition && cxt->nslaves == 0)
str = sysfs_strdup(&cxt->sysfs, "device/rev");
break;
case COL_VENDOR:
if (!cxt->partition && cxt->nslaves == 0)
str = sysfs_strdup(&cxt->sysfs, "device/vendor");
break;
case COL_SIZE:
if (!cxt->size)
break;
if (lsblk->bytes)
xasprintf(&str, "%ju", cxt->size);
else
str = size_to_human_string(SIZE_SUFFIX_1LETTER, cxt->size);
if (sort)
set_sortdata_u64(ln, col, cxt->size);
break;
case COL_STATE:
if (!cxt->partition && !cxt->dm_name)
str = sysfs_strdup(&cxt->sysfs, "device/state");
else if (cxt->dm_name) {
int x = 0;
if (sysfs_read_int(&cxt->sysfs, "dm/suspended", &x) == 0)
str = xstrdup(x ? "suspended" : "running");
}
break;
case COL_ALIOFF:
str = sysfs_strdup(&cxt->sysfs, "alignment_offset");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_MINIO:
str = sysfs_strdup(&cxt->sysfs, "queue/minimum_io_size");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_OPTIO:
str = sysfs_strdup(&cxt->sysfs, "queue/optimal_io_size");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_PHYSEC:
str = sysfs_strdup(&cxt->sysfs, "queue/physical_block_size");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_LOGSEC:
str = sysfs_strdup(&cxt->sysfs, "queue/logical_block_size");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_SCHED:
str = get_scheduler(cxt);
break;
case COL_RQ_SIZE:
str = sysfs_strdup(&cxt->sysfs, "queue/nr_requests");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_TYPE:
str = get_type(cxt);
break;
case COL_HCTL:
{
int h, c, t, l;
if (sysfs_scsi_get_hctl(&cxt->sysfs, &h, &c, &t, &l) == 0)
xasprintf(&str, "%d:%d:%d:%d", h, c, t, l);
break;
}
case COL_TRANSPORT:
str = get_transport(cxt);
break;
case COL_SUBSYS:
str = get_subsystems(cxt);
break;
case COL_DALIGN:
if (cxt->discard)
str = sysfs_strdup(&cxt->sysfs, "discard_alignment");
if (!str)
str = xstrdup("0");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
break;
case COL_DGRAN:
if (lsblk->bytes) {
str = sysfs_strdup(&cxt->sysfs, "queue/discard_granularity");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
} else {
uint64_t x;
if (sysfs_read_u64(&cxt->sysfs,
"queue/discard_granularity", &x) == 0) {
str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sort)
set_sortdata_u64(ln, col, x);
}
}
break;
case COL_DMAX:
if (lsblk->bytes) {
str = sysfs_strdup(&cxt->sysfs, "queue/discard_max_bytes");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
} else {
uint64_t x;
if (sysfs_read_u64(&cxt->sysfs,
"queue/discard_max_bytes", &x) == 0) {
str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sort)
set_sortdata_u64(ln, col, x);
}
}
break;
case COL_DZERO:
if (cxt->discard)
str = sysfs_strdup(&cxt->sysfs, "queue/discard_zeroes_data");
if (!str)
str = xstrdup("0");
break;
case COL_WSAME:
if (lsblk->bytes) {
str = sysfs_strdup(&cxt->sysfs, "queue/write_same_max_bytes");
if (sort)
set_sortdata_u64_from_string(ln, col, str);
} else {
uint64_t x;
if (sysfs_read_u64(&cxt->sysfs,
"queue/write_same_max_bytes", &x) == 0) {
str = size_to_human_string(SIZE_SUFFIX_1LETTER, x);
if (sort)
set_sortdata_u64(ln, col, x);
}
}
if (!str)
str = xstrdup("0");
break;
case COL_ZONED:
str = sysfs_strdup(&cxt->sysfs, "queue/zoned");
break;
};
if (str && scols_line_refer_data(ln, col, str))
err(EXIT_FAILURE, _("failed to add output data"));
}
static void fill_table_line(struct blkdev_cxt *cxt, struct libscols_line *scols_parent)
{
size_t i;
cxt->scols_line = scols_table_new_line(lsblk->table, scols_parent);
if (!cxt->scols_line)
err(EXIT_FAILURE, _("failed to allocate output line"));
for (i = 0; i < ncolumns; i++)
set_scols_data(cxt, i, get_column_id(i), cxt->scols_line);
}
static int set_cxt(struct blkdev_cxt *cxt,
struct blkdev_cxt *parent,
struct blkdev_cxt *wholedisk,
const char *name)
{
dev_t devno;
DBG(CXT, ul_debugobj(cxt, "setting context for %s [parent=%p, wholedisk=%p]",
name, parent, wholedisk));
cxt->parent = parent;
cxt->name = xstrdup(name);
cxt->partition = wholedisk != NULL;
cxt->filename = get_device_path(cxt);
if (!cxt->filename) {
DBG(CXT, ul_debugobj(cxt, "%s: failed to get device path", cxt->name));
return -1;
}
DBG(CXT, ul_debugobj(cxt, "%s: filename=%s", cxt->name, cxt->filename));
devno = sysfs_devname_to_devno(cxt->name, wholedisk ? wholedisk->name : NULL);
if (!devno) {
DBG(CXT, ul_debugobj(cxt, "%s: unknown device name", cxt->name));
return -1;
}
if (lsblk->inverse) {
if (sysfs_init(&cxt->sysfs, devno, wholedisk ? &wholedisk->sysfs : NULL)) {
DBG(CXT, ul_debugobj(cxt, "%s: failed to initialize sysfs handler", cxt->name));
return -1;
}
if (parent)
parent->sysfs.parent = &cxt->sysfs;
} else {
if (sysfs_init(&cxt->sysfs, devno, parent ? &parent->sysfs : NULL)) {
DBG(CXT, ul_debugobj(cxt, "%s: failed to initialize sysfs handler", cxt->name));
return -1;
}
}
cxt->maj = major(devno);
cxt->min = minor(devno);
cxt->size = 0;
if (sysfs_read_u64(&cxt->sysfs, "size", &cxt->size) == 0) /* in sectors */
cxt->size <<= 9; /* in bytes */
if (sysfs_read_int(&cxt->sysfs,
"queue/discard_granularity", &cxt->discard) != 0)
cxt->discard = 0;
/* Ignore devices of zero size */
if (!lsblk->all_devices && cxt->size == 0) {
DBG(CXT, ul_debugobj(cxt, "zero size device -- ignore"));
return -1;
}
if (is_dm(cxt->name)) {
cxt->dm_name = sysfs_strdup(&cxt->sysfs, "dm/name");
if (!cxt->dm_name) {
DBG(CXT, ul_debugobj(cxt, "%s: failed to get dm name", cxt->name));
return -1;
}
}
cxt->npartitions = sysfs_count_partitions(&cxt->sysfs, cxt->name);
cxt->nholders = sysfs_count_dirents(&cxt->sysfs, "holders");
cxt->nslaves = sysfs_count_dirents(&cxt->sysfs, "slaves");
DBG(CXT, ul_debugobj(cxt, "%s: npartitions=%d, nholders=%d, nslaves=%d",
cxt->name, cxt->npartitions, cxt->nholders, cxt->nslaves));
/* ignore non-SCSI devices */
if (lsblk->scsi && sysfs_scsi_get_hctl(&cxt->sysfs, NULL, NULL, NULL, NULL)) {
DBG(CXT, ul_debugobj(cxt, "non-scsi device -- ignore"));
return -1;
}
DBG(CXT, ul_debugobj(cxt, "%s: context successfully initialized", cxt->name));
return 0;
}
static int process_blkdev(struct blkdev_cxt *cxt, struct blkdev_cxt *parent,
int do_partitions, const char *part_name);
/*
* List device partitions if any.
*/
static int list_partitions(struct blkdev_cxt *wholedisk_cxt, struct blkdev_cxt *parent_cxt,
const char *part_name)
{
DIR *dir;
struct dirent *d;
struct blkdev_cxt part_cxt = { NULL };
int r = -1;
assert(wholedisk_cxt);
/*
* Do not process further if there are no partitions for
* this device or the device itself is a partition.
*/
if (!wholedisk_cxt->npartitions || wholedisk_cxt->partition)
return -1;
DBG(CXT, ul_debugobj(wholedisk_cxt, "probe whole-disk for partitions"));
dir = sysfs_opendir(&wholedisk_cxt->sysfs, NULL);
if (!dir)
err(EXIT_FAILURE, _("failed to open device directory in sysfs"));
while ((d = xreaddir(dir))) {
/* Process particular partition only? */
if (part_name && strcmp(part_name, d->d_name))
continue;
if (!(sysfs_is_partition_dirent(dir, d, wholedisk_cxt->name)))
continue;
DBG(CXT, ul_debugobj(wholedisk_cxt, " checking %s", d->d_name));
if (lsblk->inverse) {
/*
* <parent_cxt>
* `-<part_cxt>
* `-<wholedisk_cxt>
* `-...
*/
if (set_cxt(&part_cxt, parent_cxt, wholedisk_cxt, d->d_name))
goto next;
if (!parent_cxt && part_cxt.nholders)
goto next;
wholedisk_cxt->parent = &part_cxt;
fill_table_line(&part_cxt, parent_cxt ? parent_cxt->scols_line : NULL);
if (!lsblk->nodeps)
process_blkdev(wholedisk_cxt, &part_cxt, 0, NULL);
} else {
/*
* <parent_cxt>
* `-<wholedisk_cxt>
* `-<part_cxt>
* `-...
*/
int ps = set_cxt(&part_cxt, wholedisk_cxt, wholedisk_cxt, d->d_name);
/* Print whole disk only once */
if (r)
fill_table_line(wholedisk_cxt, parent_cxt ? parent_cxt->scols_line : NULL);
if (ps == 0 && !lsblk->nodeps)
process_blkdev(&part_cxt, wholedisk_cxt, 0, NULL);
}
next:
reset_blkdev_cxt(&part_cxt);
r = 0;
}
DBG(CXT, ul_debugobj(wholedisk_cxt, "probe whole-disk for partitions -- done"));
closedir(dir);
return r;
}
static int get_wholedisk_from_partition_dirent(DIR *dir,
struct dirent *d, struct blkdev_cxt *cxt)
{
char path[PATH_MAX];
char *p;
int len;
if ((len = readlinkat(dirfd(dir), d->d_name, path, sizeof(path) - 1)) < 0)
return 0;
path[len] = '\0';
/* The path ends with ".../<device>/<partition>" */
p = strrchr(path, '/');
if (!p)
return 0;
*p = '\0';
p = strrchr(path, '/');
if (!p)
return 0;
p++;
return set_cxt(cxt, NULL, NULL, p);
}
/*
* List device dependencies: partitions, holders (inverse = 0) or slaves (inverse = 1).
*/
static int list_deps(struct blkdev_cxt *cxt)
{
DIR *dir;
struct dirent *d;
struct blkdev_cxt dep = { NULL };
const char *depname;
assert(cxt);
if (lsblk->nodeps)
return 0;
DBG(CXT, ul_debugobj(cxt, "%s: list dependencies", cxt->name));
if (!(lsblk->inverse ? cxt->nslaves : cxt->nholders))
return 0;
depname = lsblk->inverse ? "slaves" : "holders";
dir = sysfs_opendir(&cxt->sysfs, depname);
if (!dir)
return 0;
DBG(CXT, ul_debugobj(cxt, "%s: checking for '%s' dependence", cxt->name, depname));
while ((d = xreaddir(dir))) {
/* Is the dependency a partition? */
if (sysfs_is_partition_dirent(dir, d, NULL)) {
if (!get_wholedisk_from_partition_dirent(dir, d, &dep)) {
DBG(CXT, ul_debugobj(cxt, "%s: %s: dependence is partition",
cxt->name, d->d_name));
process_blkdev(&dep, cxt, 1, d->d_name);
}
}
/* The dependency is a whole device. */
else if (!set_cxt(&dep, cxt, NULL, d->d_name)) {
DBG(CXT, ul_debugobj(cxt, "%s: %s: dependence is whole-disk",
cxt->name, d->d_name));
/* For inverse tree we don't want to show partitions
* if the dependence is on whole-disk */
process_blkdev(&dep, cxt, lsblk->inverse ? 0 : 1, NULL);
}
reset_blkdev_cxt(&dep);
}
closedir(dir);
DBG(CXT, ul_debugobj(cxt, "%s: checking for '%s' -- done", cxt->name, depname));
return 0;
}
static int process_blkdev(struct blkdev_cxt *cxt, struct blkdev_cxt *parent,
int do_partitions, const char *part_name)
{
if (do_partitions && cxt->npartitions)
list_partitions(cxt, parent, part_name); /* partitions + whole-disk */
else
fill_table_line(cxt, parent ? parent->scols_line : NULL); /* whole-disk only */
return list_deps(cxt);
}
/* Iterate devices in sysfs */
static int iterate_block_devices(void)
{
DIR *dir;
struct dirent *d;
struct blkdev_cxt cxt = { NULL };
if (!(dir = opendir(_PATH_SYS_BLOCK)))
return -errno;
DBG(DEV, ul_debug("iterate on " _PATH_SYS_BLOCK));
while ((d = xreaddir(dir))) {
DBG(DEV, ul_debug(" %s dentry", d->d_name));
if (set_cxt(&cxt, NULL, NULL, d->d_name))
goto next;
if (is_maj_excluded(cxt.maj) || !is_maj_included(cxt.maj))
goto next;
/* Skip devices in the middle of dependency tree. */
if ((lsblk->inverse ? cxt.nholders : cxt.nslaves) > 0)
goto next;
process_blkdev(&cxt, NULL, 1, NULL);
next:
reset_blkdev_cxt(&cxt);
}
closedir(dir);
DBG(DEV, ul_debug("iterate on " _PATH_SYS_BLOCK " -- done"));
return 0;
}
static char *devno_to_sysfs_name(dev_t devno, char *devname, char *buf, size_t buf_size)
{
char path[PATH_MAX];
ssize_t len;
if (!sysfs_devno_path(devno, path, sizeof(path))) {
warn(_("%s: failed to compose sysfs path"), devname);
return NULL;
}
len = readlink(path, buf, buf_size - 1);
if (len < 0) {
warn(_("%s: failed to read link"), path);
return NULL;
}
buf[len] = '\0';
return xstrdup(strrchr(buf, '/') + 1);
}
static int process_one_device(char *devname)
{
struct blkdev_cxt parent = { NULL }, cxt = { NULL };
struct stat st;
char buf[PATH_MAX + 1], *name = NULL, *diskname = NULL;
dev_t disk = 0;
int real_part = 0, rc = -EINVAL;
if (stat(devname, &st) || !S_ISBLK(st.st_mode)) {
warnx(_("%s: not a block device"), devname);
goto leave;
}
if (!(name = devno_to_sysfs_name(st.st_rdev, devname, buf, PATH_MAX))) {
warn(_("%s: failed to get sysfs name"), devname);
goto leave;
}
if (!strncmp(name, "dm-", 3)) {
/* dm mapping is never a real partition! */
real_part = 0;
} else {
if (blkid_devno_to_wholedisk(st.st_rdev, buf, sizeof(buf), &disk)) {
warn(_("%s: failed to get whole-disk device number"), devname);
goto leave;
}
diskname = buf;
real_part = st.st_rdev != disk;
}
if (!real_part) {
/*
* Device is not a partition.
*/
if (set_cxt(&cxt, NULL, NULL, name))
goto leave;
process_blkdev(&cxt, NULL, !lsblk->inverse, NULL);
} else {
/*
* Partition, read sysfs name of the device.
*/
if (set_cxt(&parent, NULL, NULL, diskname))
goto leave;
if (set_cxt(&cxt, &parent, &parent, name))
goto leave;
if (lsblk->inverse)
process_blkdev(&parent, &cxt, 1, cxt.name);
else
process_blkdev(&cxt, &parent, 1, NULL);
}
rc = 0;
leave:
free(name);
reset_blkdev_cxt(&cxt);
if (real_part)
reset_blkdev_cxt(&parent);
return rc;
}
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;
}
}
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 __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, --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(_(" -D, --discard print discard capabilities\n"), out);
fputs(_(" -z, --zoned print zone model\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(_(" -I, --include <list> show only devices with specified major numbers\n"), out);
fputs(_(" -J, --json use JSON output format\n"), out);
fputs(_(" -l, --list use list format output\n"), out);
fputs(_(" -T, --tree use tree 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(_(" -O, --output-all output all columns\n"), out);
fputs(_(" -p, --paths print complete device path\n"), out);
fputs(_(" -P, --pairs use key=\"value\" output format\n"), out);
fputs(_(" -r, --raw use raw output format\n"), out);
fputs(_(" -s, --inverse inverse dependencies\n"), out);
fputs(_(" -S, --scsi output info about SCSI devices\n"), out);
fputs(_(" -t, --topology output info about topology\n"), out);
fputs(_(" -x, --sort <column> sort output by <column>\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, " %11s %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, .flags = LSBLK_TREE };
int c, status = EXIT_FAILURE;
char *outarg = NULL;
size_t i;
int force_tree = 0;
static const struct option longopts[] = {
{ "all", no_argument, NULL, 'a' },
{ "bytes", no_argument, NULL, 'b' },
{ "nodeps", no_argument, NULL, 'd' },
{ "discard", no_argument, NULL, 'D' },
{ "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' },
{ "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' },
{ "sort", required_argument, NULL, 'x' },
{ "tree", no_argument, NULL, 'T' },
{ "version", no_argument, NULL, 'V' },
{ 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','t' },
{ 'P','T', 'l','r' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
lsblk = &_ls;
lsblk_init_debug();
while((c = getopt_long(argc, argv,
"abdDze:fhJlnmo:OpPiI:rstVSTx:", longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch(c) {
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);
break;
case 'e':
parse_excludes(optarg);
break;
case 'h':
usage();
break;
case 'J':
lsblk->flags |= LSBLK_JSON;
break;
case 'l':
lsblk->flags &= ~LSBLK_TREE; /* disable the default */
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 '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_LABEL);
add_uniq_column(COL_UUID);
add_uniq_column(COL_TARGET);
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_TRANSPORT);
break;
case 'T':
force_tree = 1;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'x':
lsblk->flags &= ~LSBLK_TREE; /* disable the default */
lsblk->sort_id = column_name_to_id(optarg, strlen(optarg));
if (lsblk->sort_id >= 0)
break;
/* fallthrough */
default:
errtryhelp(EXIT_FAILURE);
}
}
if (force_tree)
lsblk->flags |= LSBLK_TREE;
check_sysdevblock();
if (!ncolumns) {
add_column(COL_NAME);
add_column(COL_MAJMIN);
add_column(COL_RM);
add_column(COL_SIZE);
add_column(COL_RO);
add_column(COL_TYPE);
add_column(COL_TARGET);
}
if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
&ncolumns, column_name_to_id) < 0)
return EXIT_FAILURE;
if (nexcludes == 0 && nincludes == 0)
excludes[nexcludes++] = 1; /* default: ignore RAM disks */
if (lsblk->sort_id < 0)
/* Since Linux 4.8 we have sort devices by default, because
* /sys is no more sorted */
lsblk->sort_id = COL_MAJMIN;
/* For --inverse --list we still follow parent->child relation */
if (lsblk->inverse && !(lsblk->flags & LSBLK_TREE))
lsblk->force_tree_order = 1;
if (lsblk->sort_id >= 0 && column_id_to_number(lsblk->sort_id) < 0) {
/* the sort column is not between output columns -- add as hidden */
add_column(lsblk->sort_id);
lsblk->sort_hidden = 1;
}
mnt_init_debug(0);
scols_init_debug(0);
/*
* initialize output columns
*/
if (!(lsblk->table = scols_new_table()))
errx(EXIT_FAILURE, _("failed to allocate output table"));
scols_table_enable_raw(lsblk->table, !!(lsblk->flags & LSBLK_RAW));
scols_table_enable_export(lsblk->table, !!(lsblk->flags & LSBLK_EXPORT));
scols_table_enable_ascii(lsblk->table, !!(lsblk->flags & LSBLK_ASCII));
scols_table_enable_json(lsblk->table, !!(lsblk->flags & LSBLK_JSON));
scols_table_enable_noheadings(lsblk->table, !!(lsblk->flags & LSBLK_NOHEADINGS));
if (lsblk->flags & LSBLK_JSON)
scols_table_set_name(lsblk->table, "blockdevices");
for (i = 0; i < ncolumns; i++) {
struct colinfo *ci = get_column_info(i);
struct libscols_column *cl;
int id = get_column_id(i), fl = ci->flags;
if (!(lsblk->flags & LSBLK_TREE) && id == COL_NAME)
fl &= ~SCOLS_FL_TREE;
if (lsblk->sort_hidden && lsblk->sort_id == id)
fl |= SCOLS_FL_HIDDEN;
cl = scols_table_new_column(lsblk->table, ci->name, ci->whint, fl);
if (!cl) {
warn(_("failed to allocate output column"));
goto leave;
}
if (!lsblk->sort_col && lsblk->sort_id == id) {
lsblk->sort_col = cl;
scols_column_set_cmpfunc(cl,
ci->sort_type == SORT_STRING ?
scols_cmpstr_cells : cmp_u64_cells, NULL);
}
}
if (optind == argc)
status = iterate_block_devices() == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
else {
int cnt = 0, cnt_err = 0;
while (optind < argc) {
if (process_one_device(argv[optind++]) != 0)
cnt_err++;
cnt++;
}
status = cnt == 0 ? EXIT_FAILURE : /* nothing */
cnt == cnt_err ? LSBLK_EXIT_ALLFAILED :/* all failed */
cnt_err ? LSBLK_EXIT_SOMEOK : /* some ok */
EXIT_SUCCESS; /* all success */
}
if (lsblk->sort_col)
scols_sort_table(lsblk->table, lsblk->sort_col);
if (lsblk->force_tree_order)
scols_sort_table_by_tree(lsblk->table);
scols_print_table(lsblk->table);
leave:
if (lsblk->sort_col)
unref_sortdata(lsblk->table);
scols_unref_table(lsblk->table);
mnt_unref_table(mtab);
mnt_unref_table(swaps);
mnt_unref_cache(mntcache);
#ifdef HAVE_LIBUDEV
udev_unref(udev);
#endif
return status;
}