shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-10-27 18:55:19 +03:00
Code Releases Activity
1033d12040
lvm2/tools/dmsetup.c
Alasdair Kergon 08f1ddea6c Use __attribute__ consistently throughout.
2010-07-09 15:34:40 +00:00

3390 lines
79 KiB
C
Raw Blame History

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
* Copyright (C) 2005-2007 NEC Corporation
*
* This file is part of the device-mapper userspace tools.
*
* It includes tree drawing code based on pstree: http://psmisc.sourceforge.net/
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include "configure.h"
#include "dm-logging.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <libgen.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/param.h>
#include <locale.h>
#include <langinfo.h>
#include <time.h>
#include <fcntl.h>
#include <sys/stat.h>
#ifdef UDEV_SYNC_SUPPORT
# include <sys/types.h>
# include <sys/ipc.h>
# include <sys/sem.h>
# define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
# include <libudev.h>
#endif
/* FIXME Unused so far */
#undef HAVE_SYS_STATVFS_H
#ifdef HAVE_SYS_STATVFS_H
# include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#if HAVE_TERMIOS_H
# include <termios.h>
#endif
#ifdef HAVE_GETOPTLONG
# include <getopt.h>
# define GETOPTLONG_FN(a, b, c, d, e) getopt_long((a), (b), (c), (d), (e))
# define OPTIND_INIT 0
#else
struct option {
};
extern int optind;
extern char *optarg;
# define GETOPTLONG_FN(a, b, c, d, e) getopt((a), (b), (c))
# define OPTIND_INIT 1
#endif
#ifndef TEMP_FAILURE_RETRY
# define TEMP_FAILURE_RETRY(expression) \
(__extension__ \
({ long int __result; \
do __result = (long int) (expression); \
while (__result == -1L && errno == EINTR); \
__result; }))
#endif
#ifdef linux
# include "kdev_t.h"
#else
# define MAJOR(x) major((x))
# define MINOR(x) minor((x))
# define MKDEV(x,y) makedev((x),(y))
#endif
#define LINE_SIZE 4096
#define ARGS_MAX 256
#define LOOP_TABLE_SIZE (PATH_MAX + 255)
#define DEFAULT_DM_DEV_DIR "/dev/"
#define DM_DEV_DIR_ENV_VAR_NAME "DM_DEV_DIR"
#define DM_UDEV_COOKIE_ENV_VAR_NAME "DM_UDEV_COOKIE"
/* FIXME Should be imported */
#ifndef DM_MAX_TYPE_NAME
# define DM_MAX_TYPE_NAME 16
#endif
/* FIXME Should be elsewhere */
#define SECTOR_SHIFT 9L
#define err(msg, x...) fprintf(stderr, msg "\n", ##x)
/*
* We have only very simple switches ATM.
*/
enum {
READ_ONLY = 0,
COLS_ARG,
EXEC_ARG,
FORCE_ARG,
GID_ARG,
HELP_ARG,
INACTIVE_ARG,
MAJOR_ARG,
MINOR_ARG,
MODE_ARG,
NAMEPREFIXES_ARG,
NOFLUSH_ARG,
NOHEADINGS_ARG,
NOLOCKFS_ARG,
NOOPENCOUNT_ARG,
NOTABLE_ARG,
UDEVCOOKIE_ARG,
NOUDEVRULES_ARG,
NOUDEVSYNC_ARG,
OPTIONS_ARG,
READAHEAD_ARG,
ROWS_ARG,
SEPARATOR_ARG,
SHOWKEYS_ARG,
SORT_ARG,
TABLE_ARG,
TARGET_ARG,
TREE_ARG,
UID_ARG,
UNBUFFERED_ARG,
UNQUOTED_ARG,
UUID_ARG,
VERBOSE_ARG,
VERSION_ARG,
YES_ARG,
NUM_SWITCHES
};
typedef enum {
DR_TASK = 1,
DR_INFO = 2,
DR_DEPS = 4,
DR_TREE = 8, /* Complete dependency tree required */
DR_NAME = 16
} report_type_t;
static int _switches[NUM_SWITCHES];
static int _int_args[NUM_SWITCHES];
static char *_string_args[NUM_SWITCHES];
static int _num_devices;
static char *_uuid;
static char *_table;
static char *_target;
static char *_command;
static uint32_t _read_ahead_flags;
static uint32_t _udev_cookie;
static int _udev_only;
static struct dm_tree *_dtree;
static struct dm_report *_report;
static report_type_t _report_type;
/*
* Commands
*/
typedef int (*command_fn) (int argc, char **argv, void *data);
struct command {
const char *name;
const char *help;
int min_args;
int max_args;
command_fn fn;
};
static int _parse_line(struct dm_task *dmt, char *buffer, const char *file,
int line)
{
char ttype[LINE_SIZE], *ptr, *comment;
unsigned long long start, size;
int n;
/* trim trailing space */
for (ptr = buffer + strlen(buffer) - 1; ptr >= buffer; ptr--)
if (!isspace((int) *ptr))
break;
ptr++;
*ptr = '\0';
/* trim leading space */
for (ptr = buffer; *ptr && isspace((int) *ptr); ptr++)
;
if (!*ptr || *ptr == '#')
return 1;
if (sscanf(ptr, "%llu %llu %s %n",
&start, &size, ttype, &n) < 3) {
err("Invalid format on line %d of table %s", line, file);
return 0;
}
ptr += n;
if ((comment = strchr(ptr, (int) '#')))
*comment = '\0';
if (!dm_task_add_target(dmt, start, size, ttype, ptr))
return 0;
return 1;
}
static int _parse_file(struct dm_task *dmt, const char *file)
{
char *buffer = NULL;
size_t buffer_size = 0;
FILE *fp;
int r = 0, line = 0;
/* one-line table on cmdline */
if (_table)
return _parse_line(dmt, _table, "", ++line);
/* OK for empty stdin */
if (file) {
if (!(fp = fopen(file, "r"))) {
err("Couldn't open '%s' for reading", file);
return 0;
}
} else
fp = stdin;
#ifndef HAVE_GETLINE
buffer_size = LINE_SIZE;
if (!(buffer = dm_malloc(buffer_size))) {
err("Failed to malloc line buffer.");
return 0;
}
while (fgets(buffer, (int) buffer_size, fp))
#else
while (getline(&buffer, &buffer_size, fp) > 0)
#endif
if (!_parse_line(dmt, buffer, file ? : "on stdin", ++line))
goto out;
r = 1;
out:
memset(buffer, 0, buffer_size);
#ifndef HAVE_GETLINE
dm_free(buffer);
#else
free(buffer);
#endif
if (file && fclose(fp))
fprintf(stderr, "%s: fclose failed: %s", file, strerror(errno));
return r;
}
struct dm_split_name {
char *subsystem;
char *vg_name;
char *lv_name;
char *lv_layer;
};
struct dmsetup_report_obj {
struct dm_task *task;
struct dm_info *info;
struct dm_task *deps_task;
struct dm_tree_node *tree_node;
struct dm_split_name *split_name;
};
static struct dm_task *_get_deps_task(int major, int minor)
{
struct dm_task *dmt;
struct dm_info info;
if (!(dmt = dm_task_create(DM_DEVICE_DEPS)))
return NULL;
if (!dm_task_set_major(dmt, major) ||
!dm_task_set_minor(dmt, minor))
goto err;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto err;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto err;
if (!dm_task_run(dmt))
goto err;
if (!dm_task_get_info(dmt, &info))
goto err;
if (!info.exists)
goto err;
return dmt;
err:
dm_task_destroy(dmt);
return NULL;
}
static char *_extract_uuid_prefix(const char *uuid, const int separator)
{
char *ptr = NULL;
char *uuid_prefix = NULL;
size_t len;
if (uuid)
ptr = strchr(uuid, separator);
len = ptr ? ptr - uuid : 0;
if (!(uuid_prefix = dm_malloc(len + 1))) {
log_error("Failed to allocate memory to extract uuid prefix.");
return NULL;
}
memcpy(uuid_prefix, uuid, len);
uuid_prefix[len] = '\0';
return uuid_prefix;
}
static struct dm_split_name *_get_split_name(const char *uuid, const char *name,
int separator)
{
struct dm_split_name *split_name;
if (!(split_name = dm_malloc(sizeof(*split_name)))) {
log_error("Failed to allocate memory to split device name "
"into components.");
return NULL;
}
split_name->subsystem = _extract_uuid_prefix(uuid, separator);
split_name->vg_name = split_name->lv_name =
split_name->lv_layer = (char *) "";
if (!strcmp(split_name->subsystem, "LVM") &&
(!(split_name->vg_name = dm_strdup(name)) ||
!dm_split_lvm_name(NULL, NULL, &split_name->vg_name,
&split_name->lv_name, &split_name->lv_layer)))
log_error("Failed to allocate memory to split LVM name "
"into components.");
return split_name;
}
static void _destroy_split_name(struct dm_split_name *split_name)
{
/*
* lv_name and lv_layer are allocated within the same block
* of memory as vg_name so don't need to be freed separately.
*/
if (!strcmp(split_name->subsystem, "LVM"))
dm_free(split_name->vg_name);
dm_free(split_name->subsystem);
dm_free(split_name);
}
static int _display_info_cols(struct dm_task *dmt, struct dm_info *info)
{
struct dmsetup_report_obj obj;
int r = 0;
if (!info->exists) {
fprintf(stderr, "Device does not exist.\n");
return 0;
}
obj.task = dmt;
obj.info = info;
obj.deps_task = NULL;
obj.split_name = NULL;
if (_report_type & DR_TREE)
obj.tree_node = dm_tree_find_node(_dtree, info->major, info->minor);
if (_report_type & DR_DEPS)
obj.deps_task = _get_deps_task(info->major, info->minor);
if (_report_type & DR_NAME)
obj.split_name = _get_split_name(dm_task_get_uuid(dmt), dm_task_get_name(dmt), '-');
if (!dm_report_object(_report, &obj))
goto out;
r = 1;
out:
if (obj.deps_task)
dm_task_destroy(obj.deps_task);
if (obj.split_name)
_destroy_split_name(obj.split_name);
return r;
}
static void _display_info_long(struct dm_task *dmt, struct dm_info *info)
{
const char *uuid;
uint32_t read_ahead;
if (!info->exists) {
printf("Device does not exist.\n");
return;
}
printf("Name: %s\n", dm_task_get_name(dmt));
printf("State: %s%s\n",
info->suspended ? "SUSPENDED" : "ACTIVE",
info->read_only ? " (READ-ONLY)" : "");
/* FIXME Old value is being printed when it's being changed. */
if (dm_task_get_read_ahead(dmt, &read_ahead))
printf("Read Ahead: %" PRIu32 "\n", read_ahead);
if (!info->live_table && !info->inactive_table)
printf("Tables present: None\n");
else
printf("Tables present: %s%s%s\n",
info->live_table ? "LIVE" : "",
info->live_table && info->inactive_table ? " & " : "",
info->inactive_table ? "INACTIVE" : "");
if (info->open_count != -1)
printf("Open count: %d\n", info->open_count);
printf("Event number: %" PRIu32 "\n", info->event_nr);
printf("Major, minor: %d, %d\n", info->major, info->minor);
if (info->target_count != -1)
printf("Number of targets: %d\n", info->target_count);
if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
printf("UUID: %s\n", uuid);
printf("\n");
}
static int _display_info(struct dm_task *dmt)
{
struct dm_info info;
if (!dm_task_get_info(dmt, &info))
return 0;
if (!_switches[COLS_ARG])
_display_info_long(dmt, &info);
else
/* FIXME return code */
_display_info_cols(dmt, &info);
return info.exists ? 1 : 0;
}
static int _set_task_device(struct dm_task *dmt, const char *name, int optional)
{
if (name) {
if (!dm_task_set_name(dmt, name))
return 0;
} else if (_switches[UUID_ARG]) {
if (!dm_task_set_uuid(dmt, _uuid))
return 0;
} else if (_switches[MAJOR_ARG] && _switches[MINOR_ARG]) {
if (!dm_task_set_major(dmt, _int_args[MAJOR_ARG]) ||
!dm_task_set_minor(dmt, _int_args[MINOR_ARG]))
return 0;
} else if (!optional) {
fprintf(stderr, "No device specified.\n");
return 0;
}
return 1;
}
static int _load(int argc, char **argv, void *data __attribute__((unused)))
{
int r = 0;
struct dm_task *dmt;
const char *file = NULL;
const char *name = NULL;
if (_switches[NOTABLE_ARG]) {
err("--notable only available when creating new device\n");
return 0;
}
if (!_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
if (argc == 1) {
err("Please specify device.\n");
return 0;
}
name = argv[1];
argc--;
argv++;
} else if (argc > 2) {
err("Too many command line arguments.\n");
return 0;
}
if (argc == 2)
file = argv[1];
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (!_switches[NOTABLE_ARG] && !_parse_file(dmt, file))
goto out;
if (_switches[READ_ONLY] && !dm_task_set_ro(dmt))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
if (_switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _create(int argc, char **argv, void *data __attribute__((unused)))
{
int r = 0;
struct dm_task *dmt;
const char *file = NULL;
uint32_t cookie = 0;
uint16_t udev_flags = 0;
if (argc == 3)
file = argv[2];
if (!(dmt = dm_task_create(DM_DEVICE_CREATE)))
return 0;
if (!dm_task_set_name(dmt, argv[1]))
goto out;
if (_switches[UUID_ARG] && !dm_task_set_uuid(dmt, _uuid))
goto out;
if (!_switches[NOTABLE_ARG] && !_parse_file(dmt, file))
goto out;
if (_switches[READ_ONLY] && !dm_task_set_ro(dmt))
goto out;
if (_switches[MAJOR_ARG] && !dm_task_set_major(dmt, _int_args[MAJOR_ARG]))
goto out;
if (_switches[MINOR_ARG] && !dm_task_set_minor(dmt, _int_args[MINOR_ARG]))
goto out;
if (_switches[UID_ARG] && !dm_task_set_uid(dmt, _int_args[UID_ARG]))
goto out;
if (_switches[GID_ARG] && !dm_task_set_gid(dmt, _int_args[GID_ARG]))
goto out;
if (_switches[MODE_ARG] && !dm_task_set_mode(dmt, _int_args[MODE_ARG]))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (_switches[READAHEAD_ARG] &&
!dm_task_set_read_ahead(dmt, _int_args[READAHEAD_ARG],
_read_ahead_flags))
goto out;
if (_switches[NOTABLE_ARG])
dm_udev_set_sync_support(0);
if (_switches[NOUDEVRULES_ARG])
udev_flags |= DM_UDEV_DISABLE_DM_RULES_FLAG |
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG;
if (_udev_cookie) {
cookie = _udev_cookie;
if (_udev_only)
udev_flags |= DM_UDEV_DISABLE_LIBRARY_FALLBACK;
}
if (!dm_task_set_cookie(dmt, &cookie, udev_flags) ||
!dm_task_run(dmt))
goto out;
r = 1;
if (_switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
if (!_udev_cookie)
(void) dm_udev_wait(cookie);
dm_task_destroy(dmt);
return r;
}
static int _rename(int argc, char **argv, void *data __attribute__((unused)))
{
int r = 0;
struct dm_task *dmt;
uint32_t cookie = 0;
uint16_t udev_flags = 0;
if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
return 0;
/* FIXME Kernel doesn't support uuid or device number here yet */
if (!_set_task_device(dmt, (argc == 3) ? argv[1] : NULL, 0))
goto out;
if (!dm_task_set_newname(dmt, argv[argc - 1]))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (_switches[NOUDEVRULES_ARG])
udev_flags |= DM_UDEV_DISABLE_DM_RULES_FLAG |
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG;
if (_udev_cookie) {
cookie = _udev_cookie;
if (_udev_only)
udev_flags |= DM_UDEV_DISABLE_LIBRARY_FALLBACK;
}
if (!dm_task_set_cookie(dmt, &cookie, udev_flags) ||
!dm_task_run(dmt))
goto out;
r = 1;
out:
if (!_udev_cookie)
(void) dm_udev_wait(cookie);
dm_task_destroy(dmt);
return r;
}
static int _message(int argc, char **argv, void *data __attribute__((unused)))
{
int r = 0, i;
size_t sz = 1;
struct dm_task *dmt;
char *str;
if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
return 0;
if (_switches[UUID_ARG] || _switches[MAJOR_ARG]) {
if (!_set_task_device(dmt, NULL, 0))
goto out;
} else {
if (!_set_task_device(dmt, argv[1], 0))
goto out;
argc--;
argv++;
}
if (!dm_task_set_sector(dmt, (uint64_t) atoll(argv[1])))
goto out;
argc -= 2;
argv += 2;
if (argc <= 0)
err("No message supplied.\n");
for (i = 0; i < argc; i++)
sz += strlen(argv[i]) + 1;
if (!(str = dm_malloc(sz))) {
err("message string allocation failed");
goto out;
}
memset(str, 0, sz);
for (i = 0; i < argc; i++) {
if (i)
strcat(str, " ");
strcat(str, argv[i]);
}
if (!dm_task_set_message(dmt, str))
goto out;
dm_free(str);
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _setgeometry(int argc, char **argv, void *data __attribute__((unused)))
{
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_SET_GEOMETRY)))
return 0;
if (_switches[UUID_ARG] || _switches[MAJOR_ARG]) {
if (!_set_task_device(dmt, NULL, 0))
goto out;
} else {
if (!_set_task_device(dmt, argv[1], 0))
goto out;
argc--;
argv++;
}
if (!dm_task_set_geometry(dmt, argv[1], argv[2], argv[3], argv[4]))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
/* run the task */
if (!dm_task_run(dmt))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _splitname(int argc, char **argv, void *data __attribute__((unused)))
{
struct dmsetup_report_obj obj;
int r = 1;
obj.task = NULL;
obj.info = NULL;
obj.deps_task = NULL;
obj.tree_node = NULL;
obj.split_name = _get_split_name((argc == 3) ? argv[2] : "LVM",
argv[1], '\0');
r = dm_report_object(_report, &obj);
_destroy_split_name(obj.split_name);
return r;
}
static uint32_t _get_cookie_value(const char *str_value)
{
unsigned long int value;
char *p;
if (!(value = strtoul(str_value, &p, 0)) ||
*p ||
(value == ULONG_MAX && errno == ERANGE) ||
value > 0xFFFFFFFF) {
err("Incorrect cookie value");
return 0;
}
else
return (uint32_t) value;
}
static int _udevflags(int args, char **argv, void *data __attribute__((unused)))
{
uint32_t cookie;
uint16_t flags;
int i;
static const char *dm_flag_names[] = {"DISABLE_DM_RULES",
"DISABLE_SUBSYSTEM_RULES",
"DISABLE_DISK_RULES",
"DISABLE_OTHER_RULES",
"LOW_PRIORITY",
"DISABLE_LIBRARY_FALLBACK",
"PRIMARY_SOURCE",
0};
if (!(cookie = _get_cookie_value(argv[1])))
return 0;
flags = cookie >> DM_UDEV_FLAGS_SHIFT;
for (i = 0; i < DM_UDEV_FLAGS_SHIFT; i++)
if (1 << i & flags) {
if (i < DM_UDEV_FLAGS_SHIFT / 2 && dm_flag_names[i])
printf("DM_UDEV_%s_FLAG='1'\n", dm_flag_names[i]);
else if (i < DM_UDEV_FLAGS_SHIFT / 2)
/*
* This is just a fallback. Each new DM flag
* should have its symbolic name assigned.
*/
printf("DM_UDEV_FLAG%d='1'\n", i);
else
/*
* We can't assign symbolic names to subsystem
* flags. Their semantics vary based on the
* subsystem that is currently used.
*/
printf("DM_SUBSYSTEM_UDEV_FLAG%d='1'\n",
i - DM_UDEV_FLAGS_SHIFT / 2);
}
return 1;
}
static int _udevcomplete(int argc, char **argv, void *data __attribute__((unused)))
{
uint32_t cookie;
if (!(cookie = _get_cookie_value(argv[1])))
return 0;
/*
* Strip flags from the cookie and use cookie magic instead.
* If the cookie has non-zero prefix and the base is zero then
* this one carries flags to control udev rules only and it is
* not meant to be for notification. Return with success in this
* situation.
*/
if (!(cookie &= ~DM_UDEV_FLAGS_MASK))
return 1;
cookie |= DM_COOKIE_MAGIC << DM_UDEV_FLAGS_SHIFT;
return dm_udev_complete(cookie);
}
#ifndef UDEV_SYNC_SUPPORT
static const char _cmd_not_supported[] = "Command not supported. Recompile with \"--enable-udev-sync\" to enable.";
static int _udevcreatecookie(int argc, char **argv,
void *data __attribute__((unused)))
{
log_error(_cmd_not_supported);
return 0;
}
static int _udevreleasecookie(int argc, char **argv,
void *data __attribute__((unused)))
{
log_error(_cmd_not_supported);
return 0;
}
static int _udevcomplete_all(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
log_error(_cmd_not_supported);
return 0;
}
static int _udevcookies(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
log_error(_cmd_not_supported);
return 0;
}
#else /* UDEV_SYNC_SUPPORT */
static int _set_up_udev_support(const char *dev_dir)
{
struct udev *udev;
const char *udev_dev_dir;
size_t udev_dev_dir_len;
int dirs_diff;
const char *env;
if (_switches[NOUDEVSYNC_ARG])
dm_udev_set_sync_support(0);
if (!_udev_cookie) {
env = getenv(DM_UDEV_COOKIE_ENV_VAR_NAME);
if (env && *env && (_udev_cookie = _get_cookie_value(env)))
log_debug("Using udev transaction 0x%08" PRIX32
" defined by %s environment variable.",
_udev_cookie,
DM_UDEV_COOKIE_ENV_VAR_NAME);
}
else if (_switches[UDEVCOOKIE_ARG])
log_debug("Using udev transaction 0x%08" PRIX32
" defined by --udevcookie option.",
_udev_cookie);
if (!(udev = udev_new()) ||
!(udev_dev_dir = udev_get_dev_path(udev)) ||
!*udev_dev_dir) {
log_error("Could not get udev dev path.");
return 0;
}
udev_dev_dir_len = strlen(udev_dev_dir);
/*
* Normally, there's always a fallback action by libdevmapper if udev
* has not done its job correctly, e.g. the nodes were not created.
* If using udev transactions by specifying existing cookie value,
* we need to disable node creation by libdevmapper completely,
* disabling any fallback actions, since any synchronisation happens
* at the end of the transaction only. We need to do this to prevent
* races between udev and libdevmapper but only in case udev "dev path"
* is the same as "dev path" used by libdevmapper.
*/
/* There's always a slash at the end of dev_dir. But check udev_dev_dir! */
if (udev_dev_dir[udev_dev_dir_len - 1] != '/')
dirs_diff = strncmp(dev_dir, udev_dev_dir, udev_dev_dir_len);
else
dirs_diff = strcmp(dev_dir, udev_dev_dir);
_udev_only = _udev_cookie && !dirs_diff;
if (dirs_diff) {
log_debug("The path %s used for creating device nodes that is "
"set via DM_DEV_DIR environment variable differs from "
"the path %s that is used by udev. All warnings "
"about udev not working correctly while processing "
"particular nodes will be suppressed. These nodes "
"and symlinks will be managed in each directory "
"separately.", dev_dir, udev_dev_dir);
dm_udev_set_checking(0);
}
udev_unref(udev);
return 1;
}
static int _udevcreatecookie(int argc, char **argv,
void *data __attribute__((unused)))
{
uint32_t cookie;
if (!dm_udev_create_cookie(&cookie))
return 0;
if (cookie)
printf("0x%08" PRIX32 "\n", cookie);
return 1;
}
static int _udevreleasecookie(int argc, char **argv,
void *data __attribute__((unused)))
{
if (argv[1] && !(_udev_cookie = _get_cookie_value(argv[1])))
return 0;
if (!_udev_cookie) {
log_error("No udev transaction cookie given.");
return 0;
}
return dm_udev_wait(_udev_cookie);
}
static char _yes_no_prompt(const char *prompt, ...)
{
int c = 0, ret = 0;
va_list ap;
do {
if (c == '\n' || !c) {
va_start(ap, prompt);
vprintf(prompt, ap);
va_end(ap);
}
if ((c = getchar()) == EOF) {
ret = 'n';
break;
}
c = tolower(c);
if ((c == 'y') || (c == 'n'))
ret = c;
} while (!ret || c != '\n');
if (c != '\n')
printf("\n");
return ret;
}
static int _udevcomplete_all(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
int max_id, id, sid;
struct seminfo sinfo;
struct semid_ds sdata;
int counter = 0;
if (!_switches[YES_ARG]) {
log_warn("This operation will destroy all semaphores with keys "
"that have a prefix %" PRIu16 " (0x%" PRIx16 ").",
DM_COOKIE_MAGIC, DM_COOKIE_MAGIC);
if (_yes_no_prompt("Do you really want to continue? [y/n]: ") == 'n') {
log_print("Semaphores with keys prefixed by %" PRIu16
" (0x%" PRIx16 ") NOT destroyed.",
DM_COOKIE_MAGIC, DM_COOKIE_MAGIC);
return 1;
}
}
if ((max_id = semctl(0, 0, SEM_INFO, &sinfo)) < 0) {
log_sys_error("semctl", "SEM_INFO");
return 0;
}
for (id = 0; id <= max_id; id++) {
if ((sid = semctl(id, 0, SEM_STAT, &sdata)) < 0)
continue;
if (sdata.sem_perm.__key >> 16 == DM_COOKIE_MAGIC) {
if (semctl(sid, 0, IPC_RMID, 0) < 0) {
log_error("Could not cleanup notification semaphore "
"with semid %d and cookie value "
"%" PRIu32 " (0x%" PRIx32 ")", sid,
sdata.sem_perm.__key, sdata.sem_perm.__key);
continue;
}
counter++;
}
}
log_print("%d semaphores with keys prefixed by "
"%" PRIu16 " (0x%" PRIx16 ") destroyed.",
counter, DM_COOKIE_MAGIC, DM_COOKIE_MAGIC);
return 1;
}
static int _udevcookies(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
int max_id, id, sid;
struct seminfo sinfo;
struct semid_ds sdata;
int val;
char *time_str;
if ((max_id = semctl(0, 0, SEM_INFO, &sinfo)) < 0) {
log_sys_error("sem_ctl", "SEM_INFO");
return 0;
}
printf("cookie semid value last_semop_time\n");
for (id = 0; id <= max_id; id++) {
if ((sid = semctl(id, 0, SEM_STAT, &sdata)) < 0)
continue;
if (sdata.sem_perm.__key >> 16 == DM_COOKIE_MAGIC) {
if ((val = semctl(sid, 0, GETVAL)) < 0) {
log_error("semid %d: sem_ctl failed for "
"cookie 0x%" PRIx32 ": %s",
sid, sdata.sem_perm.__key,
strerror(errno));
continue;
}
time_str = ctime((const time_t *) &sdata.sem_otime);
printf("0x%-10x %-10d %-10d %s", sdata.sem_perm.__key,
sid, val, time_str ? time_str : "unknown\n");
}
}
return 1;
}
#endif /* UDEV_SYNC_SUPPORT */
static int _version(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
char version[80];
if (dm_get_library_version(version, sizeof(version)))
printf("Library version: %s\n", version);
if (!dm_driver_version(version, sizeof(version)))
return 0;
printf("Driver version: %s\n", version);
return 1;
}
static int _simple(int task, const char *name, uint32_t event_nr, int display)
{
uint32_t cookie = 0;
uint16_t udev_flags = 0;
int udev_wait_flag = task == DM_DEVICE_RESUME ||
task == DM_DEVICE_REMOVE;
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(task)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (event_nr && !dm_task_set_event_nr(dmt, event_nr))
goto out;
if (_switches[NOFLUSH_ARG] && !dm_task_no_flush(dmt))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (_switches[NOLOCKFS_ARG] && !dm_task_skip_lockfs(dmt))
goto out;
if (_switches[READAHEAD_ARG] &&
!dm_task_set_read_ahead(dmt, _int_args[READAHEAD_ARG],
_read_ahead_flags))
goto out;
if (_switches[NOUDEVRULES_ARG])
udev_flags |= DM_UDEV_DISABLE_DM_RULES_FLAG |
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG;
if (_udev_cookie) {
cookie = _udev_cookie;
if (_udev_only)
udev_flags |= DM_UDEV_DISABLE_LIBRARY_FALLBACK;
}
if (udev_wait_flag && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out;
r = dm_task_run(dmt);
if (r && display && _switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
if (!_udev_cookie && udev_wait_flag)
(void) dm_udev_wait(cookie);
dm_task_destroy(dmt);
return r;
}
static int _suspend(int argc, char **argv, void *data __attribute__((unused)))
{
return _simple(DM_DEVICE_SUSPEND, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _resume(int argc, char **argv, void *data __attribute__((unused)))
{
return _simple(DM_DEVICE_RESUME, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _clear(int argc, char **argv, void *data __attribute__((unused)))
{
return _simple(DM_DEVICE_CLEAR, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _wait(int argc, char **argv, void *data __attribute__((unused)))
{
const char *name = NULL;
if (!_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
if (argc == 1) {
err("No device specified.");
return 0;
}
name = argv[1];
argc--, argv++;
}
return _simple(DM_DEVICE_WAITEVENT, name,
(argc > 1) ? (uint32_t) atoi(argv[argc - 1]) : 0, 1);
}
static int _process_all(int argc, char **argv, int silent,
int (*fn) (int argc, char **argv, void *data))
{
int r = 1;
struct dm_names *names;
unsigned next = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
return 0;
if (!dm_task_run(dmt)) {
r = 0;
goto out;
}
if (!(names = dm_task_get_names(dmt))) {
r = 0;
goto out;
}
if (!names->dev) {
if (!silent)
printf("No devices found\n");
goto out;
}
do {
names = (void *) names + next;
if (!fn(argc, argv, (void *) names))
r = 0;
next = names->next;
} while (next);
out:
dm_task_destroy(dmt);
return r;
}
static uint64_t _get_device_size(const char *name)
{
uint64_t start, length, size = UINT64_C(0);
struct dm_info info;
char *target_type, *params;
struct dm_task *dmt;
void *next = NULL;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto out;
do {
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, &params);
size += length;
} while (next);
out:
dm_task_destroy(dmt);
return size;
}
static int _error_device(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data)
{
struct dm_names *names = (struct dm_names *) data;
struct dm_task *dmt;
const char *name;
uint64_t size;
int r = 0;
if (data)
name = names->name;
else
name = argv[1];
size = _get_device_size(name);
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto error;
if (!dm_task_add_target(dmt, UINT64_C(0), size, "error", ""))
goto error;
if (_switches[READ_ONLY] && !dm_task_set_ro(dmt))
goto error;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto error;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto error;
if (!dm_task_run(dmt))
goto error;
if (!_simple(DM_DEVICE_RESUME, name, 0, 0)) {
_simple(DM_DEVICE_CLEAR, name, 0, 0);
goto error;
}
r = 1;
error:
dm_task_destroy(dmt);
return r;
}
static int _remove(int argc, char **argv, void *data __attribute__((unused)))
{
int r;
if (_switches[FORCE_ARG] && argc > 1)
r = _error_device(argc, argv, NULL);
return _simple(DM_DEVICE_REMOVE, argc > 1 ? argv[1] : NULL, 0, 0);
}
static int _count_devices(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
_num_devices++;
return 1;
}
static int _remove_all(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
int r;
/* Remove all closed devices */
r = _simple(DM_DEVICE_REMOVE_ALL, "", 0, 0) | dm_mknodes(NULL);
if (!_switches[FORCE_ARG])
return r;
_num_devices = 0;
r |= _process_all(argc, argv, 1, _count_devices);
/* No devices left? */
if (!_num_devices)
return r;
r |= _process_all(argc, argv, 1, _error_device);
r |= _simple(DM_DEVICE_REMOVE_ALL, "", 0, 0) | dm_mknodes(NULL);
_num_devices = 0;
r |= _process_all(argc, argv, 1, _count_devices);
if (!_num_devices)
return r;
fprintf(stderr, "Unable to remove %d device(s).\n", _num_devices);
return r;
}
static void _display_dev(struct dm_task *dmt, const char *name)
{
struct dm_info info;
if (dm_task_get_info(dmt, &info))
printf("%s\t(%u, %u)\n", name, info.major, info.minor);
}
static int _mknodes(int argc, char **argv, void *data __attribute__((unused)))
{
return dm_mknodes(argc > 1 ? argv[1] : NULL);
}
static int _exec_command(const char *name)
{
int n;
static char path[PATH_MAX];
static char *args[ARGS_MAX + 1];
static int argc = 0;
char *c;
pid_t pid;
if (argc < 0)
return 0;
if (!dm_mknodes(name))
return 0;
n = snprintf(path, sizeof(path), "%s/%s", dm_dir(), name);
if (n < 0 || n > (int) sizeof(path) - 1)
return 0;
if (!argc) {
c = _command;
while (argc < ARGS_MAX) {
while (*c && isspace(*c))
c++;
if (!*c)
break;
args[argc++] = c;
while (*c && !isspace(*c))
c++;
if (*c)
*c++ = '\0';
}
if (!argc) {
argc = -1;
return 0;
}
if (argc == ARGS_MAX) {
err("Too many args to --exec\n");
argc = -1;
return 0;
}
args[argc++] = path;
args[argc] = NULL;
}
if (!(pid = fork())) {
execvp(args[0], args);
_exit(127);
} else if (pid < (pid_t) 0)
return 0;
TEMP_FAILURE_RETRY(waitpid(pid, NULL, 0));
return 1;
}
static int _status(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
void *next = NULL;
uint64_t start, length;
char *target_type = NULL;
char *params, *c;
int cmd;
struct dm_names *names = (struct dm_names *) data;
const char *name = NULL;
int matched = 0;
int ls_only = 0;
struct dm_info info;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, 0, _status);
if (argc == 2)
name = argv[1];
}
if (!strcmp(argv[0], "table"))
cmd = DM_DEVICE_TABLE;
else
cmd = DM_DEVICE_STATUS;
if (!strcmp(argv[0], "ls"))
ls_only = 1;
if (!(dmt = dm_task_create(cmd)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto out;
if (!name)
name = dm_task_get_name(dmt);
/* Fetch targets and print 'em */
do {
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, &params);
/* Skip if target type doesn't match */
if (_switches[TARGET_ARG] &&
(!target_type || strcmp(target_type, _target)))
continue;
if (ls_only) {
if (!_switches[EXEC_ARG] || !_command ||
_switches[VERBOSE_ARG])
_display_dev(dmt, name);
next = NULL;
} else if (!_switches[EXEC_ARG] || !_command ||
_switches[VERBOSE_ARG]) {
if (!matched && _switches[VERBOSE_ARG])
_display_info(dmt);
if (data && !_switches[VERBOSE_ARG])
printf("%s: ", name);
if (target_type) {
/* Suppress encryption key */
if (!_switches[SHOWKEYS_ARG] &&
cmd == DM_DEVICE_TABLE &&
!strcmp(target_type, "crypt")) {
c = params;
while (*c && *c != ' ')
c++;
if (*c)
c++;
while (*c && *c != ' ')
*c++ = '0';
}
printf("%" PRIu64 " %" PRIu64 " %s %s",
start, length, target_type, params);
}
printf("\n");
}
matched = 1;
} while (next);
if (data && _switches[VERBOSE_ARG] && matched && !ls_only)
printf("\n");
if (matched && _switches[EXEC_ARG] && _command && !_exec_command(name))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
/* Show target names and their version numbers */
static int _targets(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data __attribute__((unused)))
{
int r = 0;
struct dm_task *dmt;
struct dm_versions *target;
struct dm_versions *last_target;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return 0;
if (!dm_task_run(dmt))
goto out;
target = dm_task_get_versions(dmt);
/* Fetch targets and print 'em */
do {
last_target = target;
printf("%-16s v%d.%d.%d\n", target->name, target->version[0],
target->version[1], target->version[2]);
target = (void *) target + target->next;
} while (last_target != target);
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _info(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
struct dm_names *names = (struct dm_names *) data;
char *name = NULL;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, 0, _info);
if (argc == 2)
name = argv[1];
}
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _deps(int argc, char **argv, void *data)
{
int r = 0;
uint32_t i;
struct dm_deps *deps;
struct dm_task *dmt;
struct dm_info info;
struct dm_names *names = (struct dm_names *) data;
char *name = NULL;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, 0, _deps);
if (argc == 2)
name = argv[1];
}
if (!(dmt = dm_task_create(DM_DEVICE_DEPS)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info))
goto out;
if (!(deps = dm_task_get_deps(dmt)))
goto out;
if (!info.exists) {
printf("Device does not exist.\n");
r = 1;
goto out;
}
if (_switches[VERBOSE_ARG])
_display_info(dmt);
if (data && !_switches[VERBOSE_ARG])
printf("%s: ", name);
printf("%d dependencies\t:", deps->count);
for (i = 0; i < deps->count; i++)
printf(" (%d, %d)",
(int) MAJOR(deps->device[i]),
(int) MINOR(deps->device[i]));
printf("\n");
if (data && _switches[VERBOSE_ARG])
printf("\n");
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _display_name(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data)
{
struct dm_names *names = (struct dm_names *) data;
printf("%s\t(%d, %d)\n", names->name,
(int) MAJOR(names->dev), (int) MINOR(names->dev));
return 1;
}
/*
* Tree drawing code
*/
enum {
TR_DEVICE=0, /* display device major:minor number */
TR_TABLE,
TR_STATUS,
TR_ACTIVE,
TR_RW,
TR_OPENCOUNT,
TR_UUID,
TR_COMPACT,
TR_TRUNCATE,
TR_BOTTOMUP,
NUM_TREEMODE,
};
static int _tree_switches[NUM_TREEMODE];
#define TR_PRINT_ATTRIBUTE ( _tree_switches[TR_ACTIVE] || \
_tree_switches[TR_RW] || \
_tree_switches[TR_OPENCOUNT] || \
_tree_switches[TR_UUID] )
#define TR_PRINT_TARGETS ( _tree_switches[TR_TABLE] || \
_tree_switches[TR_STATUS] )
/* Compact - fewer newlines */
#define TR_PRINT_COMPACT (_tree_switches[TR_COMPACT] && \
!TR_PRINT_ATTRIBUTE && \
!TR_PRINT_TARGETS)
/* FIXME Get rid of this */
#define MAX_DEPTH 100
/* Drawing character definition from pstree */
/* [pstree comment] UTF-8 defines by Johan Myreen, updated by Ben Winslow */
#define UTF_V "\342\224\202" /* U+2502, Vertical line drawing char */
#define UTF_VR "\342\224\234" /* U+251C, Vertical and right */
#define UTF_H "\342\224\200" /* U+2500, Horizontal */
#define UTF_UR "\342\224\224" /* U+2514, Up and right */
#define UTF_HD "\342\224\254" /* U+252C, Horizontal and down */
#define VT_BEG "\033(0\017" /* use graphic chars */
#define VT_END "\033(B" /* back to normal char set */
#define VT_V "x" /* see UTF definitions above */
#define VT_VR "t"
#define VT_H "q"
#define VT_UR "m"
#define VT_HD "w"
static struct {
const char *empty_2; /* */
const char *branch_2; /* |- */
const char *vert_2; /* | */
const char *last_2; /* `- */
const char *single_3; /* --- */
const char *first_3; /* -+- */
}
_tsym_ascii = {
" ",
"|-",
"| ",
"`-",
"---",
"-+-"
},
_tsym_utf = {
" ",
UTF_VR UTF_H,
UTF_V " ",
UTF_UR UTF_H,
UTF_H UTF_H UTF_H,
UTF_H UTF_HD UTF_H
},
_tsym_vt100 = {
" ",
VT_BEG VT_VR VT_H VT_END,
VT_BEG VT_V VT_END " ",
VT_BEG VT_UR VT_H VT_END,
VT_BEG VT_H VT_H VT_H VT_END,
VT_BEG VT_H VT_HD VT_H VT_END
},
*_tsym = &_tsym_ascii;
/*
* Tree drawing functions.
*/
/* FIXME Get rid of these statics - use dynamic struct */
/* FIXME Explain what these vars are for */
static int _tree_width[MAX_DEPTH], _tree_more[MAX_DEPTH];
static int _termwidth = 80; /* Maximum output width */
static int _cur_x = 1; /* Current horizontal output position */
static char _last_char = 0;
static void _out_char(const unsigned c)
{
/* Only first UTF-8 char counts */
_cur_x += ((c & 0xc0) != 0x80);
if (!_tree_switches[TR_TRUNCATE]) {
putchar((int) c);
return;
}
/* Truncation? */
if (_cur_x <= _termwidth)
putchar((int) c);
if (_cur_x == _termwidth + 1 && ((c & 0xc0) != 0x80)) {
if (_last_char || (c & 0x80)) {
putchar('.');
putchar('.');
putchar('.');
} else {
_last_char = c;
_cur_x--;
}
}
}
static void _out_string(const char *str)
{
while (*str)
_out_char((unsigned char) *str++);
}
/* non-negative integers only */
static unsigned _out_int(unsigned num)
{
unsigned digits = 0;
unsigned divi;
if (!num) {
_out_char('0');
return 1;
}
/* non zero case */
for (divi = 1; num / divi; divi *= 10)
digits++;
for (divi /= 10; divi; divi /= 10)
_out_char('0' + (num / divi) % 10);
return digits;
}
static void _out_newline(void)
{
if (_last_char && _cur_x == _termwidth)
putchar(_last_char);
_last_char = 0;
putchar('\n');
_cur_x = 1;
}
static void _out_prefix(unsigned depth)
{
unsigned x, d;
for (d = 0; d < depth; d++) {
for (x = _tree_width[d] + 1; x > 0; x--)
_out_char(' ');
_out_string(d == depth - 1 ?
!_tree_more[depth] ? _tsym->last_2 : _tsym->branch_2
: _tree_more[d + 1] ?
_tsym->vert_2 : _tsym->empty_2);
}
}
/*
* Display tree
*/
static void _display_tree_attributes(struct dm_tree_node *node)
{
int attr = 0;
const char *uuid;
const struct dm_info *info;
uuid = dm_tree_node_get_uuid(node);
info = dm_tree_node_get_info(node);
if (!info->exists)
return;
if (_tree_switches[TR_ACTIVE]) {
_out_string(attr++ ? ", " : " [");
_out_string(info->suspended ? "SUSPENDED" : "ACTIVE");
}
if (_tree_switches[TR_RW]) {
_out_string(attr++ ? ", " : " [");
_out_string(info->read_only ? "RO" : "RW");
}
if (_tree_switches[TR_OPENCOUNT]) {
_out_string(attr++ ? ", " : " [");
(void) _out_int((unsigned) info->open_count);
}
if (_tree_switches[TR_UUID]) {
_out_string(attr++ ? ", " : " [");
_out_string(uuid && *uuid ? uuid : "");
}
if (attr)
_out_char(']');
}
static void _display_tree_node(struct dm_tree_node *node, unsigned depth,
unsigned first_child __attribute__((unused)),
unsigned last_child, unsigned has_children)
{
int offset;
const char *name;
const struct dm_info *info;
int first_on_line = 0;
/* Sub-tree for targets has 2 more depth */
if (depth + 2 > MAX_DEPTH)
return;
name = dm_tree_node_get_name(node);
if ((!name || !*name) && !_tree_switches[TR_DEVICE])
return;
/* Indicate whether there are more nodes at this depth */
_tree_more[depth] = !last_child;
_tree_width[depth] = 0;
if (_cur_x == 1)
first_on_line = 1;
if (!TR_PRINT_COMPACT || first_on_line)
_out_prefix(depth);
/* Remember the starting point for compact */
offset = _cur_x;
if (TR_PRINT_COMPACT && !first_on_line)
_out_string(_tree_more[depth] ? _tsym->first_3 : _tsym->single_3);
/* display node */
if (name)
_out_string(name);
info = dm_tree_node_get_info(node);
if (_tree_switches[TR_DEVICE]) {
_out_string(name ? " (" : "(");
(void) _out_int(info->major);
_out_char(':');
(void) _out_int(info->minor);
_out_char(')');
}
/* display additional info */
if (TR_PRINT_ATTRIBUTE)
_display_tree_attributes(node);
if (TR_PRINT_COMPACT)
_tree_width[depth] = _cur_x - offset;
if (!TR_PRINT_COMPACT || !has_children)
_out_newline();
if (TR_PRINT_TARGETS) {
_tree_more[depth + 1] = has_children;
// FIXME _display_tree_targets(name, depth + 2);
}
}
/*
* Walk the dependency tree
*/
static void _display_tree_walk_children(struct dm_tree_node *node,
unsigned depth)
{
struct dm_tree_node *child, *next_child;
void *handle = NULL;
uint32_t inverted = _tree_switches[TR_BOTTOMUP];
unsigned first_child = 1;
unsigned has_children;
next_child = dm_tree_next_child(&handle, node, inverted);
while ((child = next_child)) {
next_child = dm_tree_next_child(&handle, node, inverted);
has_children =
dm_tree_node_num_children(child, inverted) ? 1 : 0;
_display_tree_node(child, depth, first_child,
next_child ? 0U : 1U, has_children);
if (has_children)
_display_tree_walk_children(child, depth + 1);
first_child = 0;
}
}
static int _add_dep(int argc __attribute__((unused)), char **argv __attribute__((unused)), void *data)
{
struct dm_names *names = (struct dm_names *) data;
if (!dm_tree_add_dev(_dtree, (unsigned) MAJOR(names->dev), (unsigned) MINOR(names->dev)))
return 0;
return 1;
}
/*
* Create and walk dependency tree
*/
static int _build_whole_deptree(void)
{
if (_dtree)
return 1;
if (!(_dtree = dm_tree_create()))
return 0;
if (!_process_all(0, NULL, 0, _add_dep))
return 0;
return 1;
}
static int _display_tree(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
void *data __attribute__((unused)))
{
if (!_build_whole_deptree())
return 0;
_display_tree_walk_children(dm_tree_find_node(_dtree, 0, 0), 0);
return 1;
}
/*
* Report device information
*/
/* dm specific display functions */
static int _int32_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
const int32_t value = *(const int32_t *)data;
return dm_report_field_int32(rh, field, &value);
}
static int _uint32_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
const uint32_t value = *(const int32_t *)data;
return dm_report_field_uint32(rh, field, &value);
}
static int _dm_name_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
const char *name = dm_task_get_name((const struct dm_task *) data);
return dm_report_field_string(rh, field, &name);
}
static int _dm_uuid_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field,
const void *data, void *private __attribute__((unused)))
{
const char *uuid = dm_task_get_uuid((const struct dm_task *) data);
if (!uuid || !*uuid)
uuid = "";
return dm_report_field_string(rh, field, &uuid);
}
static int _dm_read_ahead_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
uint32_t value;
if (!dm_task_get_read_ahead((const struct dm_task *) data, &value))
value = 0;
return dm_report_field_uint32(rh, field, &value);
}
static int _dm_info_status_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
char buf[5];
const char *s = buf;
const struct dm_info *info = data;
buf[0] = info->live_table ? 'L' : '-';
buf[1] = info->inactive_table ? 'I' : '-';
buf[2] = info->suspended ? 's' : '-';
buf[3] = info->read_only ? 'r' : 'w';
buf[4] = '\0';
return dm_report_field_string(rh, field, &s);
}
static int _dm_info_table_loaded_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field,
const void *data,
void *private __attribute__((unused)))
{
const struct dm_info *info = data;
if (info->live_table) {
if (info->inactive_table)
dm_report_field_set_value(field, "Both", NULL);
else
dm_report_field_set_value(field, "Live", NULL);
return 1;
}
if (info->inactive_table)
dm_report_field_set_value(field, "Inactive", NULL);
else
dm_report_field_set_value(field, "None", NULL);
return 1;
}
static int _dm_info_suspended_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field,
const void *data,
void *private __attribute__((unused)))
{
const struct dm_info *info = data;
if (info->suspended)
dm_report_field_set_value(field, "Suspended", NULL);
else
dm_report_field_set_value(field, "Active", NULL);
return 1;
}
static int _dm_info_read_only_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field,
const void *data,
void *private __attribute__((unused)))
{
const struct dm_info *info = data;
if (info->read_only)
dm_report_field_set_value(field, "Read-only", NULL);
else
dm_report_field_set_value(field, "Writeable", NULL);
return 1;
}
static int _dm_info_devno_disp(struct dm_report *rh, struct dm_pool *mem,
struct dm_report_field *field, const void *data,
void *private)
{
char buf[DM_MAX_TYPE_NAME], *repstr;
const struct dm_info *info = data;
if (!dm_pool_begin_object(mem, 8)) {
log_error("dm_pool_begin_object failed");
return 0;
}
if (dm_snprintf(buf, sizeof(buf), "%d:%d",
info->major, info->minor) < 0) {
log_error("dm_pool_alloc failed");
goto out_abandon;
}
if (!dm_pool_grow_object(mem, buf, strlen(buf) + 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
repstr = dm_pool_end_object(mem);
dm_report_field_set_value(field, repstr, repstr);
return 1;
out_abandon:
dm_pool_abandon_object(mem);
return 0;
}
static int _dm_tree_names(struct dm_report *rh, struct dm_pool *mem,
struct dm_report_field *field, const void *data,
void *private, unsigned inverted)
{
const struct dm_tree_node *node = data;
struct dm_tree_node *parent;
void *t = NULL;
const char *name;
int first_node = 1;
char *repstr;
if (!dm_pool_begin_object(mem, 16)) {
log_error("dm_pool_begin_object failed");
return 0;
}
while ((parent = dm_tree_next_child(&t, node, inverted))) {
name = dm_tree_node_get_name(parent);
if (!name || !*name)
continue;
if (!first_node && !dm_pool_grow_object(mem, ",", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
if (!dm_pool_grow_object(mem, name, 0)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
if (first_node)
first_node = 0;
}
if (!dm_pool_grow_object(mem, "\0", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
repstr = dm_pool_end_object(mem);
dm_report_field_set_value(field, repstr, repstr);
return 1;
out_abandon:
dm_pool_abandon_object(mem);
return 0;
}
static int _dm_deps_names_disp(struct dm_report *rh,
struct dm_pool *mem,
struct dm_report_field *field,
const void *data, void *private)
{
return _dm_tree_names(rh, mem, field, data, private, 0);
}
static int _dm_tree_parents_names_disp(struct dm_report *rh,
struct dm_pool *mem,
struct dm_report_field *field,
const void *data, void *private)
{
return _dm_tree_names(rh, mem, field, data, private, 1);
}
static int _dm_tree_parents_devs_disp(struct dm_report *rh, struct dm_pool *mem,
struct dm_report_field *field,
const void *data, void *private)
{
const struct dm_tree_node *node = data;
struct dm_tree_node *parent;
void *t = NULL;
const struct dm_info *info;
int first_node = 1;
char buf[DM_MAX_TYPE_NAME], *repstr;
if (!dm_pool_begin_object(mem, 16)) {
log_error("dm_pool_begin_object failed");
return 0;
}
while ((parent = dm_tree_next_child(&t, node, 1))) {
info = dm_tree_node_get_info(parent);
if (!info->major && !info->minor)
continue;
if (!first_node && !dm_pool_grow_object(mem, ",", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
if (dm_snprintf(buf, sizeof(buf), "%d:%d",
info->major, info->minor) < 0) {
log_error("dm_snprintf failed");
goto out_abandon;
}
if (!dm_pool_grow_object(mem, buf, 0)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
if (first_node)
first_node = 0;
}
if (!dm_pool_grow_object(mem, "\0", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
repstr = dm_pool_end_object(mem);
dm_report_field_set_value(field, repstr, repstr);
return 1;
out_abandon:
dm_pool_abandon_object(mem);
return 0;
}
static int _dm_tree_parents_count_disp(struct dm_report *rh,
struct dm_pool *mem,
struct dm_report_field *field,
const void *data, void *private)
{
const struct dm_tree_node *node = data;
int num_parent = dm_tree_node_num_children(node, 1);
return dm_report_field_int(rh, field, &num_parent);
}
static int _dm_deps_disp(struct dm_report *rh, struct dm_pool *mem,
struct dm_report_field *field, const void *data,
void *private)
{
struct dm_deps *deps = (struct dm_deps *) data;
int i;
char buf[DM_MAX_TYPE_NAME], *repstr;
if (!dm_pool_begin_object(mem, 16)) {
log_error("dm_pool_begin_object failed");
return 0;
}
for (i = 0; i < deps->count; i++) {
if (dm_snprintf(buf, sizeof(buf), "%d:%d",
(int) MAJOR(deps->device[i]),
(int) MINOR(deps->device[i])) < 0) {
log_error("dm_snprintf failed");
goto out_abandon;
}
if (!dm_pool_grow_object(mem, buf, 0)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
if (i + 1 < deps->count && !dm_pool_grow_object(mem, ",", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
}
if (!dm_pool_grow_object(mem, "\0", 1)) {
log_error("dm_pool_grow_object failed");
goto out_abandon;
}
repstr = dm_pool_end_object(mem);
dm_report_field_set_value(field, repstr, repstr);
return 1;
out_abandon:
dm_pool_abandon_object(mem);
return 0;
}
static int _dm_subsystem_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
return dm_report_field_string(rh, field, (const char **) data);
}
static int _dm_vg_name_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
return dm_report_field_string(rh, field, (const char **) data);
}
static int _dm_lv_name_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
return dm_report_field_string(rh, field, (const char **) data);
}
static int _dm_lv_layer_name_disp(struct dm_report *rh,
struct dm_pool *mem __attribute__((unused)),
struct dm_report_field *field, const void *data,
void *private __attribute__((unused)))
{
return dm_report_field_string(rh, field, (const char **) data);
}
static void *_task_get_obj(void *obj)
{
return ((struct dmsetup_report_obj *)obj)->task;
}
static void *_info_get_obj(void *obj)
{
return ((struct dmsetup_report_obj *)obj)->info;
}
static void *_deps_get_obj(void *obj)
{
return dm_task_get_deps(((struct dmsetup_report_obj *)obj)->deps_task);
}
static void *_tree_get_obj(void *obj)
{
return ((struct dmsetup_report_obj *)obj)->tree_node;
}
static void *_split_name_get_obj(void *obj)
{
return ((struct dmsetup_report_obj *)obj)->split_name;
}
static const struct dm_report_object_type _report_types[] = {
{ DR_TASK, "Mapped Device Name", "", _task_get_obj },
{ DR_INFO, "Mapped Device Information", "", _info_get_obj },
{ DR_DEPS, "Mapped Device Relationship Information", "", _deps_get_obj },
{ DR_TREE, "Mapped Device Relationship Information", "", _tree_get_obj },
{ DR_NAME, "Mapped Device Name Components", "", _split_name_get_obj },
{ 0, "", "", NULL },
};
/* Column definitions */
#define OFFSET_OF(strct, field) (((char*)&((struct strct*)0)->field) - (char*)0)
#define STR (DM_REPORT_FIELD_TYPE_STRING)
#define NUM (DM_REPORT_FIELD_TYPE_NUMBER)
#define FIELD_O(type, strct, sorttype, head, field, width, func, id, desc) {DR_ ## type, sorttype, OFFSET_OF(strct, field), width, id, head, &_ ## func ## _disp, desc},
#define FIELD_F(type, sorttype, head, width, func, id, desc) {DR_ ## type, sorttype, 0, width, id, head, &_ ## func ## _disp, desc},
static const struct dm_report_field_type _report_fields[] = {
/* *INDENT-OFF* */
FIELD_F(TASK, STR, "Name", 16, dm_name, "name", "Name of mapped device.")
FIELD_F(TASK, STR, "UUID", 32, dm_uuid, "uuid", "Unique (optional) identifier for mapped device.")
/* FIXME Next one should be INFO */
FIELD_F(TASK, NUM, "RAhead", 6, dm_read_ahead, "read_ahead", "Read ahead in sectors.")
FIELD_F(INFO, STR, "Stat", 4, dm_info_status, "attr", "(L)ive, (I)nactive, (s)uspended, (r)ead-only, read-(w)rite.")
FIELD_F(INFO, STR, "Tables", 6, dm_info_table_loaded, "tables_loaded", "Which of the live and inactive table slots are filled.")
FIELD_F(INFO, STR, "Suspended", 9, dm_info_suspended, "suspended", "Whether the device is suspended.")
FIELD_F(INFO, STR, "Read-only", 9, dm_info_read_only, "readonly", "Whether the device is read-only or writeable.")
FIELD_F(INFO, STR, "DevNo", 5, dm_info_devno, "devno", "Device major and minor numbers")
FIELD_O(INFO, dm_info, NUM, "Maj", major, 3, int32, "major", "Block device major number.")
FIELD_O(INFO, dm_info, NUM, "Min", minor, 3, int32, "minor", "Block device minor number.")
FIELD_O(INFO, dm_info, NUM, "Open", open_count, 4, int32, "open", "Number of references to open device, if requested.")
FIELD_O(INFO, dm_info, NUM, "Targ", target_count, 4, int32, "segments", "Number of segments in live table, if present.")
FIELD_O(INFO, dm_info, NUM, "Event", event_nr, 6, uint32, "events", "Number of most recent event.")
FIELD_O(DEPS, dm_deps, NUM, "#Devs", count, 5, int32, "device_count", "Number of devices used by this one.")
FIELD_F(TREE, STR, "DevNames", 8, dm_deps_names, "devs_used", "List of names of mapped devices used by this one.")
FIELD_F(DEPS, STR, "DevNos", 6, dm_deps, "devnos_used", "List of device numbers of devices used by this one.")
FIELD_F(TREE, NUM, "#Refs", 5, dm_tree_parents_count, "device_ref_count", "Number of mapped devices referencing this one.")
FIELD_F(TREE, STR, "RefNames", 8, dm_tree_parents_names, "names_using_dev", "List of names of mapped devices using this one.")
FIELD_F(TREE, STR, "RefDevNos", 9, dm_tree_parents_devs, "devnos_using_dev", "List of device numbers of mapped devices using this one.")
FIELD_O(NAME, dm_split_name, STR, "Subsys", subsystem, 6, dm_subsystem, "subsystem", "Userspace subsystem responsible for this device.")
FIELD_O(NAME, dm_split_name, STR, "VG", vg_name, 4, dm_vg_name, "vg_name", "LVM Volume Group name.")
FIELD_O(NAME, dm_split_name, STR, "LV", lv_name, 4, dm_lv_name, "lv_name", "LVM Logical Volume name.")
FIELD_O(NAME, dm_split_name, STR, "LVLayer", lv_layer, 7, dm_lv_layer_name, "lv_layer", "LVM device layer.")
{0, 0, 0, 0, "", "", NULL, NULL},
/* *INDENT-ON* */
};
#undef STR
#undef NUM
#undef FIELD_O
#undef FIELD_F
static const char *default_report_options = "name,major,minor,attr,open,segments,events,uuid";
static const char *splitname_report_options = "vg_name,lv_name,lv_layer";
static int _report_init(struct command *c)
{
char *options = (char *) default_report_options;
const char *keys = "";
const char *separator = " ";
int aligned = 1, headings = 1, buffered = 1, field_prefixes = 0;
int quoted = 1, columns_as_rows = 0;
uint32_t flags = 0;
size_t len = 0;
int r = 0;
if (c && !strcmp(c->name, "splitname"))
options = (char *) splitname_report_options;
/* emulate old dmsetup behaviour */
if (_switches[NOHEADINGS_ARG]) {
separator = ":";
aligned = 0;
headings = 0;
}
if (_switches[UNBUFFERED_ARG])
buffered = 0;
if (_switches[ROWS_ARG])
columns_as_rows = 1;
if (_switches[UNQUOTED_ARG])
quoted = 0;
if (_switches[NAMEPREFIXES_ARG]) {
aligned = 0;
field_prefixes = 1;
}
if (_switches[OPTIONS_ARG] && _string_args[OPTIONS_ARG]) {
if (*_string_args[OPTIONS_ARG] != '+')
options = _string_args[OPTIONS_ARG];
else {
len = strlen(default_report_options) +
strlen(_string_args[OPTIONS_ARG]) + 1;
if (!(options = dm_malloc(len))) {
err("Failed to allocate option string.");
return 0;
}
if (dm_snprintf(options, len, "%s,%s",
default_report_options,
&_string_args[OPTIONS_ARG][1]) < 0) {
err("snprintf failed");
goto out;
}
}
}
if (_switches[SORT_ARG] && _string_args[SORT_ARG]) {
keys = _string_args[SORT_ARG];
buffered = 1;
if (c && (!strcmp(c->name, "status") || !strcmp(c->name, "table"))) {
err("--sort is not yet supported with status and table");
goto out;
}
}
if (_switches[SEPARATOR_ARG] && _string_args[SEPARATOR_ARG]) {
separator = _string_args[SEPARATOR_ARG];
aligned = 0;
}
if (aligned)
flags |= DM_REPORT_OUTPUT_ALIGNED;
if (buffered)
flags |= DM_REPORT_OUTPUT_BUFFERED;
if (headings)
flags |= DM_REPORT_OUTPUT_HEADINGS;
if (field_prefixes)
flags |= DM_REPORT_OUTPUT_FIELD_NAME_PREFIX;
if (!quoted)
flags |= DM_REPORT_OUTPUT_FIELD_UNQUOTED;
if (columns_as_rows)
flags |= DM_REPORT_OUTPUT_COLUMNS_AS_ROWS;
if (!(_report = dm_report_init(&_report_type,
_report_types, _report_fields,
options, separator, flags, keys, NULL)))
goto out;
if ((_report_type & DR_TREE) && !_build_whole_deptree()) {
err("Internal device dependency tree creation failed.");
goto out;
}
if (field_prefixes)
dm_report_set_output_field_name_prefix(_report, "dm_");
r = 1;
out:
if (len)
dm_free(options);
return r;
}
/*
* List devices
*/
static int _ls(int argc, char **argv, void *data)
{
if ((_switches[TARGET_ARG] && _target) ||
(_switches[EXEC_ARG] && _command))
return _status(argc, argv, data);
else if ((_switches[TREE_ARG]))
return _display_tree(argc, argv, data);
else
return _process_all(argc, argv, 0, _display_name);
}
static int _help(int argc, char **argv, void *data);
/*
* Dispatch table
*/
static struct command _commands[] = {
{"help", "[-c|-C|--columns]", 0, 0, _help},
{"create", "<dev_name> [-j|--major <major> -m|--minor <minor>]\n"
"\t [-U|--uid <uid>] [-G|--gid <gid>] [-M|--mode <octal_mode>]\n"
"\t [-u|uuid <uuid>]\n"
"\t [--notable | --table <table> | <table_file>]",
1, 2, _create},
{"remove", "[-f|--force] <device>", 0, 1, _remove},
{"remove_all", "[-f|--force]", 0, 0, _remove_all},
{"suspend", "[--noflush] <device>", 0, 1, _suspend},
{"resume", "<device>", 0, 1, _resume},
{"load", "<device> [<table_file>]", 0, 2, _load},
{"clear", "<device>", 0, 1, _clear},
{"reload", "<device> [<table_file>]", 0, 2, _load},
{"rename", "<device> <new_name>", 1, 2, _rename},
{"message", "<device> <sector> <message>", 2, -1, _message},
{"ls", "[--target <target_type>] [--exec <command>] [--tree [-o options]]", 0, 0, _ls},
{"info", "[<device>]", 0, 1, _info},
{"deps", "[<device>]", 0, 1, _deps},
{"status", "[<device>] [--target <target_type>]", 0, 1, _status},
{"table", "[<device>] [--target <target_type>] [--showkeys]", 0, 1, _status},
{"wait", "<device> [<event_nr>]", 0, 2, _wait},
{"mknodes", "[<device>]", 0, 1, _mknodes},
{"udevcreatecookie", "", 0, 0, _udevcreatecookie},
{"udevreleasecookie", "[<cookie>]", 0, 1, _udevreleasecookie},
{"udevflags", "<cookie>", 1, 1, _udevflags},
{"udevcomplete", "<cookie>", 1, 1, _udevcomplete},
{"udevcomplete_all", "", 0, 0, _udevcomplete_all},
{"udevcookies", "", 0, 0, _udevcookies},
{"targets", "", 0, 0, _targets},
{"version", "", 0, 0, _version},
{"setgeometry", "<device> <cyl> <head> <sect> <start>", 5, 5, _setgeometry},
{"splitname", "<device> [<subsystem>]", 1, 2, _splitname},
{NULL, NULL, 0, 0, NULL}
};
static void _usage(FILE *out)
{
int i;
fprintf(out, "Usage:\n\n");
fprintf(out, "dmsetup [--version] [-h|--help [-c|-C|--columns]]\n"
" [-v|--verbose [-v|--verbose ...]]\n"
" [-r|--readonly] [--noopencount] [--nolockfs] [--inactive]\n"
" [--udevcookie] [--noudevrules] [--noudevsync] [-y|--yes]\n"
" [--readahead [+]<sectors>|auto|none]\n"
" [-c|-C|--columns] [-o <fields>] [-O|--sort <sort_fields>]\n"
" [--nameprefixes] [--noheadings] [--separator <separator>]\n\n");
for (i = 0; _commands[i].name; i++)
fprintf(out, "\t%s %s\n", _commands[i].name, _commands[i].help);
fprintf(out, "\n<device> may be device name or -u <uuid> or "
"-j <major> -m <minor>\n");
fprintf(out, "<fields> are comma-separated. Use 'help -c' for list.\n");
fprintf(out, "Table_file contents may be supplied on stdin.\n");
fprintf(out, "Tree options are: ascii, utf, vt100; compact, inverted, notrunc;\n"
" [no]device, active, open, rw and uuid.\n");
fprintf(out, "\n");
}
static void _losetup_usage(FILE *out)
{
fprintf(out, "Usage:\n\n");
fprintf(out, "losetup [-d|-a] [-e encryption] "
"[-o offset] [-f|loop_device] [file]\n\n");
}
static int _help(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
void *data __attribute__((unused)))
{
_usage(stderr);
if (_switches[COLS_ARG]) {
_switches[OPTIONS_ARG] = 1;
_string_args[OPTIONS_ARG] = (char *) "help";
_switches[SORT_ARG] = 0;
if (_report) {
dm_report_free(_report);
_report = NULL;
}
(void) _report_init(NULL);
}
return 1;
}
static struct command *_find_command(const char *name)
{
int i;
for (i = 0; _commands[i].name; i++)
if (!strcmp(_commands[i].name, name))
return _commands + i;
return NULL;
}
static int _process_tree_options(const char *options)
{
const char *s, *end;
struct winsize winsz;
size_t len;
/* Symbol set default */
if (!strcmp(nl_langinfo(CODESET), "UTF-8"))
_tsym = &_tsym_utf;
else
_tsym = &_tsym_ascii;
/* Default */
_tree_switches[TR_DEVICE] = 1;
_tree_switches[TR_TRUNCATE] = 1;
/* parse */
for (s = options; s && *s; s++) {
len = 0;
for (end = s; *end && *end != ','; end++, len++)
;
if (!strncmp(s, "device", len))
_tree_switches[TR_DEVICE] = 1;
else if (!strncmp(s, "nodevice", len))
_tree_switches[TR_DEVICE] = 0;
else if (!strncmp(s, "status", len))
_tree_switches[TR_STATUS] = 1;
else if (!strncmp(s, "table", len))
_tree_switches[TR_TABLE] = 1;
else if (!strncmp(s, "active", len))
_tree_switches[TR_ACTIVE] = 1;
else if (!strncmp(s, "open", len))
_tree_switches[TR_OPENCOUNT] = 1;
else if (!strncmp(s, "uuid", len))
_tree_switches[TR_UUID] = 1;
else if (!strncmp(s, "rw", len))
_tree_switches[TR_RW] = 1;
else if (!strncmp(s, "utf", len))
_tsym = &_tsym_utf;
else if (!strncmp(s, "vt100", len))
_tsym = &_tsym_vt100;
else if (!strncmp(s, "ascii", len))
_tsym = &_tsym_ascii;
else if (!strncmp(s, "inverted", len))
_tree_switches[TR_BOTTOMUP] = 1;
else if (!strncmp(s, "compact", len))
_tree_switches[TR_COMPACT] = 1;
else if (!strncmp(s, "notrunc", len))
_tree_switches[TR_TRUNCATE] = 0;
else {
fprintf(stderr, "Tree options not recognised: %s\n", s);
return 0;
}
if (!*end)
break;
s = end;
}
/* Truncation doesn't work well with vt100 drawing char */
if (_tsym != &_tsym_vt100)
if (ioctl(1, (unsigned long) TIOCGWINSZ, &winsz) >= 0 && winsz.ws_col > 3)
_termwidth = winsz.ws_col - 3;
return 1;
}
/*
* Returns the full absolute path, or NULL if the path could
* not be resolved.
*/
static char *_get_abspath(const char *path)
{
char *_path;
#ifdef HAVE_CANONICALIZE_FILE_NAME
_path = canonicalize_file_name(path);
#else
/* FIXME Provide alternative */
#endif
return _path;
}
static char *parse_loop_device_name(const char *dev, const char *dev_dir)
{
char *buf;
char *device;
if (!(buf = dm_malloc(PATH_MAX)))
return NULL;
if (dev[0] == '/') {
if (!(device = _get_abspath(dev)))
goto error;
if (strncmp(device, dev_dir, strlen(dev_dir)))
goto error;
/* If dev_dir does not end in a slash, ensure that the
following byte in the device string is "/". */
if (dev_dir[strlen(dev_dir) - 1] != '/' &&
device[strlen(dev_dir)] != '/')
goto error;
strncpy(buf, strrchr(device, '/') + 1, (size_t) PATH_MAX);
dm_free(device);
} else {
/* check for device number */
if (!strncmp(dev, "loop", strlen("loop")))
strncpy(buf, dev, (size_t) PATH_MAX);
else
goto error;
}
return buf;
error:
return NULL;
}
/*
* create a table for a mapped device using the loop target.
*/
static int _loop_table(char *table, size_t tlen, char *file,
char *dev __attribute__((unused)), off_t off)
{
struct stat fbuf;
off_t size, sectors;
int fd = -1;
#ifdef HAVE_SYS_STATVFS_H
struct statvfs fsbuf;
off_t blksize;
#endif
if (!_switches[READ_ONLY])
fd = open(file, O_RDWR);
if (fd < 0) {
_switches[READ_ONLY]++;
fd = open(file, O_RDONLY);
}
if (fd < 0)
goto error;
if (fstat(fd, &fbuf))
goto error;
size = (fbuf.st_size - off);
sectors = size >> SECTOR_SHIFT;
if (_switches[VERBOSE_ARG])
fprintf(stderr, "losetup: set loop size to %llukB "
"(%llu sectors)\n", (long long unsigned) sectors >> 1,
(long long unsigned) sectors);
#ifdef HAVE_SYS_STATVFS_H
if (fstatvfs(fd, &fsbuf))
goto error;
/* FIXME Fragment size currently unused */
blksize = fsbuf.f_frsize;
#endif
close(fd);
if (dm_snprintf(table, tlen, "%llu %llu loop %s %llu\n", 0ULL,
(long long unsigned)sectors, file, (long long unsigned)off) < 0)
return 0;
if (_switches[VERBOSE_ARG] > 1)
fprintf(stderr, "Table: %s\n", table);
return 1;
error:
if (fd > -1)
close(fd);
return 0;
}
static int _process_losetup_switches(const char *base, int *argc, char ***argv,
const char *dev_dir)
{
static int ind;
int c;
int encrypt_loop = 0, delete = 0, find = 0, show_all = 0;
char *device_name = NULL;
char *loop_file = NULL;
off_t offset = 0;
#ifdef HAVE_GETOPTLONG
static struct option long_options[] = {
{0, 0, 0, 0}
};
#endif
optarg = 0;
optind = OPTIND_INIT;
while ((ind = -1, c = GETOPTLONG_FN(*argc, *argv, "ade:fo:v",
long_options, NULL)) != -1 ) {
if (c == ':' || c == '?')
return 0;
if (c == 'a')
show_all++;
if (c == 'd')
delete++;
if (c == 'e')
encrypt_loop++;
if (c == 'f')
find++;
if (c == 'o')
offset = atoi(optarg);
if (c == 'v')
_switches[VERBOSE_ARG]++;
}
*argv += optind ;
*argc -= optind ;
if (encrypt_loop){
fprintf(stderr, "%s: Sorry, cryptoloop is not yet implemented "
"in this version.\n", base);
return 0;
}
if (show_all) {
fprintf(stderr, "%s: Sorry, show all is not yet implemented "
"in this version.\n", base);
return 0;
}
if (find) {
fprintf(stderr, "%s: Sorry, find is not yet implemented "
"in this version.\n", base);
if (!*argc)
return 0;
}
if (!*argc) {
fprintf(stderr, "%s: Please specify loop_device.\n", base);
_losetup_usage(stderr);
return 0;
}
if (!(device_name = parse_loop_device_name((*argv)[0], dev_dir))) {
fprintf(stderr, "%s: Could not parse loop_device %s\n",
base, (*argv)[0]);
_losetup_usage(stderr);
return 0;
}
if (delete) {
*argc = 2;
(*argv)[1] = device_name;
(*argv)[0] = (char *) "remove";
return 1;
}
if (*argc != 2) {
fprintf(stderr, "%s: Too few arguments\n", base);
_losetup_usage(stderr);
dm_free(device_name);
return 0;
}
/* FIXME move these to make them available to native dmsetup */
if (!(loop_file = _get_abspath((*argv)[(find) ? 0 : 1]))) {
fprintf(stderr, "%s: Could not parse loop file name %s\n",
base, (*argv)[1]);
_losetup_usage(stderr);
dm_free(device_name);
return 0;
}
/* FIXME Missing free */
_table = dm_malloc(LOOP_TABLE_SIZE);
if (!_loop_table(_table, (size_t) LOOP_TABLE_SIZE, loop_file, device_name, offset)) {
fprintf(stderr, "Could not build device-mapper table for %s\n", (*argv)[0]);
dm_free(device_name);
return 0;
}
_switches[TABLE_ARG]++;
(*argv)[0] = (char *) "create";
(*argv)[1] = device_name ;
return 1;
}
static int _process_switches(int *argc, char ***argv, const char *dev_dir)
{
char *base, *namebase, *s;
static int ind;
int c, r;
#ifdef HAVE_GETOPTLONG
static struct option long_options[] = {
{"readonly", 0, &ind, READ_ONLY},
{"columns", 0, &ind, COLS_ARG},
{"exec", 1, &ind, EXEC_ARG},
{"force", 0, &ind, FORCE_ARG},
{"gid", 1, &ind, GID_ARG},
{"help", 0, &ind, HELP_ARG},
{"inactive", 0, &ind, INACTIVE_ARG},
{"major", 1, &ind, MAJOR_ARG},
{"minor", 1, &ind, MINOR_ARG},
{"mode", 1, &ind, MODE_ARG},
{"nameprefixes", 0, &ind, NAMEPREFIXES_ARG},
{"noflush", 0, &ind, NOFLUSH_ARG},
{"noheadings", 0, &ind, NOHEADINGS_ARG},
{"nolockfs", 0, &ind, NOLOCKFS_ARG},
{"noopencount", 0, &ind, NOOPENCOUNT_ARG},
{"notable", 0, &ind, NOTABLE_ARG},
{"udevcookie", 1, &ind, UDEVCOOKIE_ARG},
{"noudevrules", 0, &ind, NOUDEVRULES_ARG},
{"noudevsync", 0, &ind, NOUDEVSYNC_ARG},
{"options", 1, &ind, OPTIONS_ARG},
{"readahead", 1, &ind, READAHEAD_ARG},
{"rows", 0, &ind, ROWS_ARG},
{"separator", 1, &ind, SEPARATOR_ARG},
{"showkeys", 0, &ind, SHOWKEYS_ARG},
{"sort", 1, &ind, SORT_ARG},
{"table", 1, &ind, TABLE_ARG},
{"target", 1, &ind, TARGET_ARG},
{"tree", 0, &ind, TREE_ARG},
{"uid", 1, &ind, UID_ARG},
{"uuid", 1, &ind, UUID_ARG},
{"unbuffered", 0, &ind, UNBUFFERED_ARG},
{"unquoted", 0, &ind, UNQUOTED_ARG},
{"verbose", 1, &ind, VERBOSE_ARG},
{"version", 0, &ind, VERSION_ARG},
{"yes", 0, &ind, YES_ARG},
{0, 0, 0, 0}
};
#else
struct option long_options;
#endif
/*
* Zero all the index counts.
*/
memset(&_switches, 0, sizeof(_switches));
memset(&_int_args, 0, sizeof(_int_args));
_read_ahead_flags = 0;
namebase = strdup((*argv)[0]);
base = basename(namebase);
if (!strcmp(base, "devmap_name")) {
free(namebase);
_switches[COLS_ARG]++;
_switches[NOHEADINGS_ARG]++;
_switches[OPTIONS_ARG]++;
_switches[MAJOR_ARG]++;
_switches[MINOR_ARG]++;
_string_args[OPTIONS_ARG] = (char *) "name";
if (*argc == 3) {
_int_args[MAJOR_ARG] = atoi((*argv)[1]);
_int_args[MINOR_ARG] = atoi((*argv)[2]);
*argc -= 2;
*argv += 2;
} else if ((*argc == 2) &&
(2 == sscanf((*argv)[1], "%i:%i",
&_int_args[MAJOR_ARG],
&_int_args[MINOR_ARG]))) {
*argc -= 1;
*argv += 1;
} else {
fprintf(stderr, "Usage: devmap_name <major> <minor>\n");
return 0;
}
(*argv)[0] = (char *) "info";
return 1;
}
if (!strcmp(base, "losetup") || !strcmp(base, "dmlosetup")){
r = _process_losetup_switches(base, argc, argv, dev_dir);
free(namebase);
return r;
}
free(namebase);
optarg = 0;
optind = OPTIND_INIT;
while ((ind = -1, c = GETOPTLONG_FN(*argc, *argv, "cCfG:hj:m:M:no:O:ru:U:vy",
long_options, NULL)) != -1) {
if (c == ':' || c == '?')
return 0;
if (c == 'h' || ind == HELP_ARG)
_switches[HELP_ARG]++;
if (c == 'c' || c == 'C' || ind == COLS_ARG)
_switches[COLS_ARG]++;
if (c == 'f' || ind == FORCE_ARG)
_switches[FORCE_ARG]++;
if (c == 'r' || ind == READ_ONLY)
_switches[READ_ONLY]++;
if (c == 'j' || ind == MAJOR_ARG) {
_switches[MAJOR_ARG]++;
_int_args[MAJOR_ARG] = atoi(optarg);
}
if (c == 'm' || ind == MINOR_ARG) {
_switches[MINOR_ARG]++;
_int_args[MINOR_ARG] = atoi(optarg);
}
if (c == 'n' || ind == NOTABLE_ARG)
_switches[NOTABLE_ARG]++;
if (c == 'o' || ind == OPTIONS_ARG) {
_switches[OPTIONS_ARG]++;
_string_args[OPTIONS_ARG] = optarg;
}
if (ind == SEPARATOR_ARG) {
_switches[SEPARATOR_ARG]++;
_string_args[SEPARATOR_ARG] = optarg;
}
if (c == 'O' || ind == SORT_ARG) {
_switches[SORT_ARG]++;
_string_args[SORT_ARG] = optarg;
}
if (c == 'v' || ind == VERBOSE_ARG)
_switches[VERBOSE_ARG]++;
if (c == 'u' || ind == UUID_ARG) {
_switches[UUID_ARG]++;
_uuid = optarg;
}
if (c == 'y' || ind == YES_ARG)
_switches[YES_ARG]++;
if (ind == UDEVCOOKIE_ARG) {
_switches[UDEVCOOKIE_ARG]++;
_udev_cookie = _get_cookie_value(optarg);
}
if (ind == NOUDEVRULES_ARG)
_switches[NOUDEVRULES_ARG]++;
if (ind == NOUDEVSYNC_ARG)
_switches[NOUDEVSYNC_ARG]++;
if (c == 'G' || ind == GID_ARG) {
_switches[GID_ARG]++;
_int_args[GID_ARG] = atoi(optarg);
}
if (c == 'U' || ind == UID_ARG) {
_switches[UID_ARG]++;
_int_args[UID_ARG] = atoi(optarg);
}
if (c == 'M' || ind == MODE_ARG) {
_switches[MODE_ARG]++;
/* FIXME Accept modes as per chmod */
_int_args[MODE_ARG] = (int) strtol(optarg, NULL, 8);
}
if ((ind == EXEC_ARG)) {
_switches[EXEC_ARG]++;
_command = optarg;
}
if ((ind == TARGET_ARG)) {
_switches[TARGET_ARG]++;
_target = optarg;
}
if ((ind == INACTIVE_ARG))
_switches[INACTIVE_ARG]++;
if ((ind == NAMEPREFIXES_ARG))
_switches[NAMEPREFIXES_ARG]++;
if ((ind == NOFLUSH_ARG))
_switches[NOFLUSH_ARG]++;
if ((ind == NOHEADINGS_ARG))
_switches[NOHEADINGS_ARG]++;
if ((ind == NOLOCKFS_ARG))
_switches[NOLOCKFS_ARG]++;
if ((ind == NOOPENCOUNT_ARG))
_switches[NOOPENCOUNT_ARG]++;
if ((ind == READAHEAD_ARG)) {
_switches[READAHEAD_ARG]++;
if (!strcasecmp(optarg, "auto"))
_int_args[READAHEAD_ARG] = DM_READ_AHEAD_AUTO;
else if (!strcasecmp(optarg, "none"))
_int_args[READAHEAD_ARG] = DM_READ_AHEAD_NONE;
else {
for (s = optarg; isspace(*s); s++)
;
if (*s == '+')
_read_ahead_flags = DM_READ_AHEAD_MINIMUM_FLAG;
_int_args[READAHEAD_ARG] = atoi(optarg);
if (_int_args[READAHEAD_ARG] < -1) {
log_error("Negative read ahead value "
"(%d) is not understood.",
_int_args[READAHEAD_ARG]);
return 0;
}
}
}
if ((ind == ROWS_ARG))
_switches[ROWS_ARG]++;
if ((ind == SHOWKEYS_ARG))
_switches[SHOWKEYS_ARG]++;
if ((ind == TABLE_ARG)) {
_switches[TABLE_ARG]++;
_table = optarg;
}
if ((ind == TREE_ARG))
_switches[TREE_ARG]++;
if ((ind == UNQUOTED_ARG))
_switches[UNQUOTED_ARG]++;
if ((ind == VERSION_ARG))
_switches[VERSION_ARG]++;
}
if (_switches[VERBOSE_ARG] > 1)
dm_log_init_verbose(_switches[VERBOSE_ARG] - 1);
if ((_switches[MAJOR_ARG] && !_switches[MINOR_ARG]) ||
(!_switches[MAJOR_ARG] && _switches[MINOR_ARG])) {
fprintf(stderr, "Please specify both major number and "
"minor number.\n");
return 0;
}
if (_switches[TREE_ARG] && !_process_tree_options(_string_args[OPTIONS_ARG]))
return 0;
if (_switches[TABLE_ARG] && _switches[NOTABLE_ARG]) {
fprintf(stderr, "--table and --notable are incompatible.\n");
return 0;
}
*argv += optind;
*argc -= optind;
return 1;
}
int main(int argc, char **argv)
{
struct command *c;
int r = 1;
const char *dev_dir;
(void) setlocale(LC_ALL, "");
dev_dir = getenv (DM_DEV_DIR_ENV_VAR_NAME);
if (dev_dir && *dev_dir) {
if (!dm_set_dev_dir(dev_dir)) {
fprintf(stderr, "Invalid DM_DEV_DIR environment variable value.\n");
goto out;
}
} else
dev_dir = DEFAULT_DM_DEV_DIR;
if (!_process_switches(&argc, &argv, dev_dir)) {
fprintf(stderr, "Couldn't process command line.\n");
goto out;
}
if (_switches[HELP_ARG]) {
c = _find_command("help");
goto doit;
}
if (_switches[VERSION_ARG]) {
c = _find_command("version");
goto doit;
}
if (argc == 0) {
_usage(stderr);
goto out;
}
if (!(c = _find_command(argv[0]))) {
fprintf(stderr, "Unknown command\n");
_usage(stderr);
goto out;
}
if (argc < c->min_args + 1 ||
(c->max_args >= 0 && argc > c->max_args + 1)) {
fprintf(stderr, "Incorrect number of arguments\n");
_usage(stderr);
goto out;
}
if (!_switches[COLS_ARG] && !strcmp(c->name, "splitname"))
_switches[COLS_ARG]++;
if (_switches[COLS_ARG] && !_report_init(c))
goto out;
#ifdef UDEV_SYNC_SUPPORT
if (!_set_up_udev_support(dev_dir))
goto out;
#endif
doit:
if (!c->fn(argc, argv, NULL)) {
fprintf(stderr, "Command failed\n");
goto out;
}
r = 0;
out:
if (_report) {
dm_report_output(_report);
dm_report_free(_report);
}
if (_dtree)
dm_tree_free(_dtree);
return r;
}
View Git Blame Copy Permalink