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dmsetup.c
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dmsetup.c
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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2018 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: https://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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
// For canonicalize_file_name()
#include "libdm/misc/dm-logging.h"
#include "libdm/dm-tools/util.h"
#include <ctype.h>
#include <dirent.h>
#include <fcntl.h>
#include <langinfo.h>
#include <locale.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef UDEV_SYNC_SUPPORT
# include <sys/types.h>
# include <sys/ipc.h>
# include <sys/sem.h>
# 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
#ifdef HAVE_SYS_TIMERFD_H
# include <sys/timerfd.h>
#endif
#ifdef 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 {
};
# 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 "libdm/misc/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
/* program_id used for dmstats-managed statistics regions */
#define DM_STATS_PROGRAM_ID "dmstats"
/*
* Basic commands this code implments.
*/
typedef enum {
DMSETUP_CMD = 0,
LOSETUP_CMD = 1,
DMLOSETUP_CMD = 2,
DMSTATS_CMD = 3,
DMSETUP_STATS_CMD = 4,
DEVMAP_NAME_CMD = 5
} cmd_name_t;
typedef enum {
DMSETUP_TYPE = 0,
LOSETUP_TYPE = 1,
STATS_TYPE = 2,
DEVMAP_NAME_TYPE = 3
} cmd_type_t;
#define DMSETUP_CMD_NAME "dmsetup"
#define LOSETUP_CMD_NAME "losetup"
#define DMLOSETUP_CMD_NAME "dmlosetup"
#define DMSTATS_CMD_NAME "dmstats"
#define DMSETUP_STATS_CMD_NAME "dmsetup stats"
#define DEVMAP_NAME_CMD_NAME "devmap_name"
static const struct {
cmd_name_t command;
const char name[14];
cmd_type_t type;
} _base_commands[] = {
{ DMSETUP_CMD, DMSETUP_CMD_NAME, DMSETUP_TYPE },
{ LOSETUP_CMD, LOSETUP_CMD_NAME, LOSETUP_TYPE },
{ DMLOSETUP_CMD, DMLOSETUP_CMD_NAME, LOSETUP_TYPE },
{ DMSTATS_CMD, DMSTATS_CMD_NAME, STATS_TYPE },
{ DMSETUP_STATS_CMD, DMSETUP_STATS_CMD_NAME, STATS_TYPE },
{ DEVMAP_NAME_CMD, DEVMAP_NAME_CMD_NAME, DEVMAP_NAME_TYPE },
};
static const int _num_base_commands = DM_ARRAY_SIZE(_base_commands);
/*
* We have only very simple switches ATM.
*/
enum {
READ_ONLY = 0,
ADD_NODE_ON_CREATE_ARG,
ADD_NODE_ON_RESUME_ARG,
ALIAS_ARG,
ALL_DEVICES_ARG,
ALL_PROGRAMS_ARG,
ALL_REGIONS_ARG,
AREA_ARG,
AREAS_ARG,
AREA_SIZE_ARG,
CONCISE_ARG,
BOUNDS_ARG,
CHECKS_ARG,
CLEAR_ARG,
COLS_ARG,
COUNT_ARG,
DEFERRED_ARG,
SELECT_ARG,
EXEC_ARG,
FILEMAP_ARG,
FOLLOW_ARG,
FORCE_ARG,
FOREGROUND_ARG,
GID_ARG,
GROUP_ARG,
GROUP_ID_ARG,
HELP_ARG,
HISTOGRAM_ARG,
INACTIVE_ARG,
INTERVAL_ARG,
LENGTH_ARG,
MANGLENAME_ARG,
MAJOR_ARG,
REGIONS_ARG,
MINOR_ARG,
MODE_ARG,
NAMEPREFIXES_ARG,
NOFLUSH_ARG,
NOGROUP_ARG,
NOHEADINGS_ARG,
NOLOCKFS_ARG,
NOOPENCOUNT_ARG,
NOSUFFIX_ARG,
NOTABLE_ARG,
NOTIMESUFFIX_ARG,
UDEVCOOKIE_ARG,
NOMONITOR_ARG,
NOUDEVRULES_ARG,
NOUDEVSYNC_ARG,
OPTIONS_ARG,
PRECISE_ARG,
PROGRAM_ID_ARG,
RAW_ARG,
READAHEAD_ARG,
REGION_ARG,
REGION_ID_ARG,
RELATIVE_ARG,
RETRY_ARG,
ROWS_ARG,
SEPARATOR_ARG,
SETUUID_ARG,
SHOWKEYS_ARG,
SORT_ARG,
START_ARG,
TABLE_ARG,
TARGET_ARG,
SEGMENTS_ARG,
TREE_ARG,
UID_ARG,
UNBUFFERED_ARG,
UNITS_ARG,
UNQUOTED_ARG,
USER_DATA_ARG,
UUID_ARG,
VERBOSE_ARG,
VERIFYUDEV_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,
DR_STATS = 32, /* Requires populated stats handle. */
DR_STATS_META = 64, /* Requires listed stats handle. */
} report_type_t;
typedef enum {
DN_DEVNO, /* Major and minor number pair */
DN_BLK, /* Block device name (e.g. dm-0) */
DN_MAP /* Map name (for dm devices only, equal to DN_BLK otherwise) */
} dev_name_t;
static cmd_name_t _base_command = DMSETUP_CMD; /* Default command is 'dmsetup' */
static cmd_type_t _base_command_type = DMSETUP_TYPE;
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_to_exec; /* --exec <command> */
static const char *_command; /* dmsetup <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;
static dev_name_t _dev_name_type;
static uint64_t _count = 1; /* count of repeating reports */
static struct dm_timestamp *_initial_timestamp = NULL;
static uint64_t _disp_factor = 512; /* display sizes in sectors */
static char _disp_units = 's';
const char *_program_id = DM_STATS_PROGRAM_ID; /* program_id used for reports. */
static uint64_t _statstype = 0; /* stats objects to report */
static int _concise_output_produced = 0; /* Was any concise output already printed? */
struct command;
static const struct command *_selection_cmd = NULL; /* Command to run against each device select with -S */
/* string names for stats object types */
const char *_stats_types[] = {
"all",
"area",
"region",
"group",
NULL
};
/* report timekeeping */
static struct dm_timestamp *_cycle_timestamp = NULL;
#ifndef HAVE_SYS_TIMERFD_H
static struct dm_timestamp *_start_timestamp = NULL;
#else /* HAVE_SYS_TIMERFD_H */
static int _timer_fd = -1; /* timerfd file descriptor. */
#endif /* !HAVE_SYS_TIMERFD_H */
static uint64_t _interval = 0; /* configured interval in nsecs */
static uint64_t _new_interval = 0; /* flag top-of-interval */
static uint64_t _last_interval = 0; /* approx. measured interval in nsecs */
/* Invalid fd value used to signal end-of-reporting. */
#define TIMER_STOPPED (-2)
#define NSEC_PER_USEC UINT64_C(1000)
#define NSEC_PER_MSEC UINT64_C(1000000)
#define NSEC_PER_SEC UINT64_C(1000000000)
/*
* Commands
*/
#define CMD_ARGS const struct command *cmd, const char *subcommand, int argc, char **argv, struct dm_names *names, int multiple_devices
typedef int (*command_fn) (CMD_ARGS);
struct command {
const char *name;
const char *help;
int min_args;
int max_args;
int repeatable_cmd; /* Repeat to process device list? */
/* 2 means --select is also supported */
int has_subcommands; /* Command implements sub-commands. */
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) {
log_error("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;
}
/* Parse multiple lines of table */
static int _parse_table_lines(struct dm_task *dmt)
{
char *pos = _table, *next_pos;
int line = 0;
do {
/* Identify and terminate each line */
if ((next_pos = strchr(pos, '\n')))
*next_pos++ = '\0';
if (!_parse_line(dmt, pos, "", ++line))
return_0;
} while ((pos = next_pos));
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;
/* Table on cmdline or from stdin with --concise */
if (_table)
return _parse_table_lines(dmt);
/* OK for empty stdin */
if (file) {
if (!(fp = fopen(file, "r"))) {
log_error("Couldn't open '%s' for reading.", file);
return 0;
}
} else
fp = stdin;
#ifndef HAVE_GETLINE
buffer_size = LINE_SIZE;
if (!(buffer = malloc(buffer_size))) {
log_error("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
free(buffer);
#else
free(buffer);
#endif
if (file && fclose(fp))
log_sys_debug("fclose", file);
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;
struct dm_stats *stats;
};
static int _task_run(struct dm_task *dmt)
{
int r;
uint64_t delta;
struct dm_timestamp *ts;
if (_initial_timestamp)
dm_task_set_record_timestamp(dmt);
r = dm_task_run(dmt);
if (_initial_timestamp &&
(ts = dm_task_get_ioctl_timestamp(dmt))) {
delta = dm_timestamp_delta(ts, _initial_timestamp);
log_debug("Timestamp: %7" PRIu64 ".%09" PRIu64 " seconds",
delta / NSEC_PER_SEC, delta % NSEC_PER_SEC);
}
return r;
}
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_bad;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto_bad;
if (_switches[INACTIVE_ARG] && !dm_task_query_inactive_table(dmt))
goto_bad;
if (_switches[CHECKS_ARG] && !dm_task_enable_checks(dmt))
goto_bad;
if (!_task_run(dmt))
goto_bad;
if (!dm_task_get_info(dmt, &info))
goto_bad;
if (!info.exists)
goto_bad;
return dmt;
bad:
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 = malloc(len + 1))) {
log_error("Failed to allocate memory to extract uuid prefix.");
return NULL;
}
if (uuid)
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 = malloc(sizeof(*split_name)))) {
log_error("Failed to allocate memory to split device name "
"into components.");
return NULL;
}
if (!(split_name->subsystem = _extract_uuid_prefix(uuid, separator))) {
free(split_name);
return_NULL;
}
split_name->vg_name = split_name->lv_name =
split_name->lv_layer = (char *) "";
if (!strcmp(split_name->subsystem, "LVM") &&
(!(split_name->vg_name = 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"))
free(split_name->vg_name);
free(split_name->subsystem);
free(split_name);
}
/*
* Stats clock:
*
* Use either Linux timerfds or usleep to implement the reporting
* interval wait.
*
* _start_timer() - Start the timer running.
* _do_timer_wait() - Wait until the beginning of the next interval.
*
* _update_interval_times() - Update timestamps and interval estimate.
*/
/*
* Return the current interval number counting upwards from one.
*/
static uint64_t _interval_num(void)
{
uint64_t count_arg = _int_args[COUNT_ARG];
return ((uint64_t) _int_args[COUNT_ARG] - _count) + !!count_arg;
}
#ifdef HAVE_SYS_TIMERFD_H
static int _start_timerfd_timer(void)
{
struct itimerspec interval_timer;
time_t secs;
long nsecs;
log_debug("Using timerfd for interval timekeeping.");
/* timer running? */
if (_timer_fd != -1)
return 1;
memset(&interval_timer, 0, sizeof(interval_timer));
/* Use CLOCK_MONOTONIC to avoid warp on RTC adjustments. */
if ((_timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC)) < 0) {
log_error("Could not create timer: %s", strerror(errno));
return 0;
}
secs = (time_t) _interval / NSEC_PER_SEC;
nsecs = (long) _interval % NSEC_PER_SEC;
/* Must set interval and value to create an armed periodic timer. */
interval_timer.it_interval.tv_sec = secs;
interval_timer.it_interval.tv_nsec = nsecs;
interval_timer.it_value.tv_sec = secs;
interval_timer.it_value.tv_nsec = nsecs;
log_debug("Setting interval timer to: " FMTu64 "s %ldns", (uint64_t)secs, nsecs);
if (timerfd_settime(_timer_fd, 0, &interval_timer, NULL)) {
log_error("Could not set interval timer: %s", strerror(errno));
return 0;
}
return 1;
}
static int _do_timerfd_wait(void)
{
uint64_t expired;
ssize_t bytes;
if (_timer_fd < 0)
return_0;
/* read on timerfd returns a uint64_t in host byte order. */
bytes = read(_timer_fd, &expired, sizeof(expired));
if (bytes < 0) {
/* EBADF from invalid timerfd or EINVAL from too small buffer. */
log_error("Interval timer wait failed: %s.", strerror(errno));
return 0;
}
/* read(2) on a timerfd descriptor is guaranteed to return 8 bytes. */
if (bytes != 8)
log_error("Unexpected byte count on timerfd read: " FMTssize_t ".", bytes);
/* FIXME: attempt to rebase clock? */
if (expired > 1)
log_warn("WARNING: Try increasing --interval ("FMTu64
" missed timer events).", expired - 1);
/* Signal that a new interval has begun. */
_new_interval = 1;
/* Final interval? */
if (_count == 2) {
if (close(_timer_fd))
stack;
/* Tell _update_interval_times() to shut down. */
_timer_fd = TIMER_STOPPED;
}
return 1;
}
static int _start_timer(void)
{
return _start_timerfd_timer();
}
static int _do_timer_wait(void)
{
return _do_timerfd_wait();
}
static int _timer_running(void)
{
return ((_timer_fd != TIMER_STOPPED) || _cycle_timestamp);
}
#else /* !HAVE_SYS_TIMERFD_H */
static int _start_usleep_timer(void)
{
log_debug("Using usleep for interval timekeeping.");
_start_timestamp = dm_timestamp_alloc();
dm_timestamp_get(_start_timestamp);
return 1;
}
static int _do_usleep_wait(void)
{
static struct dm_timestamp *_now = NULL;
uint64_t this_interval;
int64_t delta_t;
/*
* Report clock: compensate for time spent in userspace and stats
* message ioctls by keeping track of the last wake time and
* adjusting the sleep interval accordingly.
*/
if (!_now) {
if (!(_now = dm_timestamp_alloc()))
return_0;
dm_timestamp_get(_now);
this_interval = _interval;
log_error("Using "FMTu64" as first interval.", this_interval);
} else {
dm_timestamp_get(_now);
delta_t = dm_timestamp_delta(_now, _start_timestamp);
log_debug("Interval timer drift: "FMTd64".",
(delta_t % _interval));
/* FIXME: usleep timer drift over large counts. */
/* adjust for time spent populating and reporting */
this_interval = _interval - (delta_t % _interval);
log_debug("Using "FMTu64" as interval.", this_interval);
}
/* Signal that a new interval has begun. */
_new_interval = 1;
if (usleep(this_interval / NSEC_PER_USEC)) {
if (errno == EINTR)
log_error("Report interval interrupted by signal.");
else if (errno == EINVAL)
log_error("Report interval too short.");
else
stack; /* other reason */
return 0;
}
if (_count == 2) {
dm_timestamp_destroy(_start_timestamp);
dm_timestamp_destroy(_now);
_start_timestamp = _now = NULL;
}
return 1;
}
static int _start_timer(void)
{
return _start_usleep_timer();
}
static int _do_timer_wait(void)
{
return _do_usleep_wait();
}
static int _timer_running(void)
{
return (_start_timestamp != NULL);
}
#endif /* HAVE_SYS_TIMERFD_H */
static int _update_interval_times(void)
{
static struct dm_timestamp *this_timestamp = NULL;
uint64_t delta_t, interval_num = _interval_num();
int r = 1;
/*
* Clock shutdown for exit - nothing to do.
*/
if (!_timer_running())
goto out;
/* clock is running */
r = 0;
/*
* Current timestamp. If _new_interval is set this is used as
* the new cycle start timestamp.
*/
if (!this_timestamp) {
if (!(this_timestamp = dm_timestamp_alloc()))
return_0;
}
/*
* Take cycle timstamp as close as possible to ioctl return.
*
* FIXME: use per-region timestamp deltas for interval estimate.
*/
if (!dm_timestamp_get(this_timestamp))
goto_out;
/*
* Stats clock: maintain a single timestamp taken just after the
* call to dm_stats_populate() and take a delta between the current
* and last value to determine the sampling interval.
*
* A new interval is started when the _new_interval flag is set
* on return from _do_report_wait().
*
* The first interval is treated as a special case: since the
* time since the last clear of the counters is unknown (no
* previous timestamp exists) the duration is assumed to be the
* configured value.
*/
if (_cycle_timestamp)
/* Current delta_t: time from start of cycle to now. */
delta_t = dm_timestamp_delta(this_timestamp, _cycle_timestamp);
else {
_cycle_timestamp = dm_timestamp_alloc();
if (!_cycle_timestamp) {
log_error("Could not allocate timestamp object.");
goto out;
}
/* Pretend we have the configured interval. */
delta_t = _interval;
/* start the first cycle */
log_debug("Beginning first interval.");
_new_interval = 1;
}
log_debug("Interval #%-4"PRIu64" time delta: %12"PRIu64"ns.",
interval_num, delta_t);
if (_new_interval) {
/* Update timestamp and interval and clear _new_interval */
dm_timestamp_copy(_cycle_timestamp, this_timestamp);
_last_interval = delta_t;
_new_interval = 0;
/*
* Log interval duration and current error.
*/
log_debug("Interval #%-5"PRIu64" current err: %12"PRIi64"ns.",
interval_num, ((int64_t)_last_interval - (int64_t)_interval));
log_debug("End interval #%-9"PRIu64" duration: %12"PRIu64"ns.",
interval_num, _last_interval);
}
r = 1;
out:
/* timer stopped or never started */
if (!r || !_timer_running()) {
/* The _cycle_timestamp has not yet been allocated if we
* fail to obtain this_timestamp on the first interval.
*/
if (_cycle_timestamp)
dm_timestamp_destroy(_cycle_timestamp);
dm_timestamp_destroy(this_timestamp);
/* Clear timestamp pointers to signal shutdown. */
_cycle_timestamp = this_timestamp = NULL;
}
return r;
}
static int _display_info_cols(struct dm_task *dmt, struct dm_info *info)
{
struct dmsetup_report_obj obj;
uint64_t walk_flags = _statstype;
int r = 0;
int selected;
char *device_name;
obj.task = dmt;
obj.info = info;
obj.deps_task = NULL;
obj.split_name = NULL;
obj.stats = NULL;
if (_report_type & DR_TREE)
if (!(obj.tree_node = dm_tree_find_node(_dtree, info->major, info->minor))) {
log_error("Cannot find node %d:%d.", info->major, info->minor);
goto out;
}
if (_report_type & DR_DEPS)
if (!(obj.deps_task = _get_deps_task(info->major, info->minor))) {
log_error("Cannot get deps for %d:%d.", info->major, info->minor);
goto out;
}
if (_report_type & DR_NAME)
if (!(obj.split_name = _get_split_name(dm_task_get_uuid(dmt),
dm_task_get_name(dmt), '-')))
goto_out;
if (!(_report_type & (DR_STATS | DR_STATS_META))) {
/*
* If _selection_cmd is set we are applying -S to some other command, so suppress
* output and run that other command if the device matches the criteria.
*/
if (!dm_report_object_is_selected(_report, &obj, _selection_cmd ? 0 : 1, &selected))
goto_out;
if (_selection_cmd && selected) {
device_name = (char*) dm_task_get_name(dmt);
if (!_selection_cmd->fn(_selection_cmd, NULL, 1, &device_name, NULL, 1))
goto_out;
}
r = 1;
goto out;
}
/*
* Obtain statistics for the current reporting object and set
* the interval estimate used for stats rate conversion.
*/
if (_report_type & DR_STATS) {
if (!(obj.stats = dm_stats_create(DM_STATS_PROGRAM_ID)))
goto_out;
dm_stats_bind_devno(obj.stats, info->major, info->minor);
if (!dm_stats_populate(obj.stats, _program_id, DM_STATS_REGIONS_ALL)) {
r = 1;
goto out;
}
/* Update timestamps and handle end-of-interval accounting. */
_update_interval_times();
log_debug("Adjusted sample interval duration: %12"PRIu64"ns.", _last_interval);
/* use measured approximation for calculations */
dm_stats_set_sampling_interval_ns(obj.stats, _last_interval);
} else if (!obj.stats && (_report_type & DR_STATS_META)
/* Only a dm_stats_list is needed for DR_STATS_META reports. */
&& !(_report_type & DR_STATS)) {
if (!(obj.stats = dm_stats_create(DM_STATS_PROGRAM_ID)))
goto_out;
dm_stats_bind_devno(obj.stats, info->major, info->minor);
if (!dm_stats_list(obj.stats, _program_id))
goto_out;
/* No regions to report is not an error */
if (!dm_stats_get_nr_regions(obj.stats)) {
r = 1;
goto out;
}
}
/* Group report with no groups is not an error */
if ((walk_flags == DM_STATS_WALK_GROUP)
&& !dm_stats_get_nr_groups(obj.stats)) {
r = 1;
goto out;
}
dm_stats_walk_init(obj.stats, walk_flags);
dm_stats_walk_do(obj.stats) {
if (!dm_report_object(_report, &obj))
goto_out;
dm_stats_walk_next(obj.stats);
} dm_stats_walk_while(obj.stats);
r = 1;
out:
if (obj.deps_task)
dm_task_destroy(obj.deps_task);
if (obj.split_name)
_destroy_split_name(obj.split_name);
if (obj.stats)
dm_stats_destroy(obj.stats);
return r;
}
static void _display_info_long(struct dm_task *dmt, struct dm_info *info)
{
const char *uuid;
uint32_t read_ahead;
printf("Name: %s\n", dm_task_get_name(dmt));
printf("State: %s%s%s\n",
info->suspended ? "SUSPENDED" : "ACTIVE",
info->read_only ? " (READ-ONLY)" : "",
info->deferred_remove ? " (DEFERRED REMOVE)" : "");
/* 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);