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lvm2/tools/lvmcmdline.c
David Teigland 62533ae3fa vgchange -aay: optimize device list using pvs_online files 
Port another optimization from pvscan -aay to vgchange -aay:
  "pvscan: only add device args to dev cache"

This optimization avoids doing a full dev_cache_scan, and
instead populates dev-cache with only the devices in the
VG being activated.

This involves shifting the use of pvs_online files from
the hints interface up to the higher level label_scan
interface.  This specialized label_scan is structured
around creating a list of devices from the pvs_online
files.  Previously, a list of all devices was created
first, and then reduced based on the pvs_online files.
The initial step of listing all devices was slow when
thousands of devices are present on the system.

This optimization extends the previous optimization that
used pvs_online files to limit the devices that were
actually scanned (i.e. reading to identify the device):
  "vgchange -aay: optimize device scan using pvs_online files"
2021-11-05 12:19:35 -05:00

3828 lines
100 KiB
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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* 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 Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "tools.h"
#include "lvm2cmdline.h"
#include "lib/label/label.h"
#include "lib/device/device_id.h"
#include "lvm-version.h"
#include "lib/locking/lvmlockd.h"
#include "lib/datastruct/str_list.h"
/* coverity[unnecessary_header] */
#include "stub.h"
#include "lib/misc/last-path-component.h"
#include <sys/stat.h>
#include <time.h>
#include <sys/resource.h>
#include <dirent.h>
#include <paths.h>
#include <locale.h>
#include <langinfo.h>
#ifdef HAVE_VALGRIND
#include <valgrind.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
/*
* Table of valid --option values.
*/
extern struct val_name val_names[VAL_COUNT + 1];
/*
* Table of valid --option's
*/
extern struct opt_name opt_names[ARG_COUNT + 1];
/*
* Table of LV properties
*/
extern struct lv_prop lv_props[LVP_COUNT + 1];
/*
* Table of LV types
*/
extern struct lv_type lv_types[LVT_COUNT + 1];
/*
* Table of command names
*/
extern struct command_name command_names[];
/*
* Table of commands (as defined in command-lines.in)
*/
struct command commands[COMMAND_COUNT];
struct command *commands_idx[COMMAND_COUNT];
static struct cmdline_context _cmdline;
/*
* Table of command line functions
*
* This table could be auto-generated once all commands have been converted
* to use these functions instead of the old per-command-name function.
* For now, any command id not included here uses the old command fn.
*/
static const struct command_function _command_functions[CMD_COUNT] = {
{ lvmconfig_general_CMD, lvmconfig },
{ lvchange_properties_CMD, lvchange_properties_cmd },
{ lvchange_resync_CMD, lvchange_resync_cmd },
{ lvchange_syncaction_CMD, lvchange_syncaction_cmd },
{ lvchange_rebuild_CMD, lvchange_rebuild_cmd },
{ lvchange_activate_CMD, lvchange_activate_cmd },
{ lvchange_refresh_CMD, lvchange_refresh_cmd },
{ lvchange_monitor_CMD, lvchange_monitor_poll_cmd },
{ lvchange_poll_CMD, lvchange_monitor_poll_cmd },
{ lvchange_persistent_CMD, lvchange_persistent_cmd },
{ vgchange_locktype_CMD, vgchange_locktype_cmd },
{ vgchange_lockstart_CMD, vgchange_lock_start_stop_cmd },
{ vgchange_lockstop_CMD, vgchange_lock_start_stop_cmd },
{ vgchange_systemid_CMD, vgchange_systemid_cmd },
/* lvconvert utilities related to repair. */
{ lvconvert_repair_CMD, lvconvert_repair_cmd },
{ lvconvert_replace_pv_CMD, lvconvert_replace_pv_cmd },
/* lvconvert utilities related to snapshots. */
{ lvconvert_split_cow_snapshot_CMD, lvconvert_split_snapshot_cmd },
{ lvconvert_merge_snapshot_CMD, lvconvert_merge_snapshot_cmd },
{ lvconvert_combine_split_snapshot_CMD, lvconvert_combine_split_snapshot_cmd },
/* lvconvert utility to trigger polling on an LV. */
{ lvconvert_start_poll_CMD, lvconvert_start_poll_cmd },
{ lvconvert_plain_CMD, lvconvert_start_poll_cmd },
/* lvconvert utilities for creating/maintaining thin and cache objects. */
{ lvconvert_to_thinpool_CMD, lvconvert_to_pool_cmd },
{ lvconvert_to_cachepool_CMD, lvconvert_to_pool_cmd },
{ lvconvert_to_thin_with_external_CMD, lvconvert_to_thin_with_external_cmd },
{ lvconvert_to_cache_with_cachevol_CMD, lvconvert_to_cache_with_cachevol_cmd },
{ lvconvert_to_cache_with_device_CMD, lvconvert_to_cache_with_cachevol_cmd },
{ lvconvert_to_cache_with_cachepool_CMD, lvconvert_to_cache_with_cachepool_cmd },
{ lvconvert_to_writecache_CMD, lvconvert_to_writecache_cmd },
{ lvconvert_to_writecache_with_device_CMD, lvconvert_to_writecache_cmd },
{ lvconvert_swap_pool_metadata_CMD, lvconvert_swap_pool_metadata_cmd },
{ lvconvert_to_thinpool_or_swap_metadata_CMD, lvconvert_to_pool_or_swap_metadata_cmd },
{ lvconvert_to_cachepool_or_swap_metadata_CMD, lvconvert_to_pool_or_swap_metadata_cmd },
{ lvconvert_merge_thin_CMD, lvconvert_merge_thin_cmd },
{ lvconvert_split_and_keep_cache_CMD, lvconvert_split_cache_cmd },
{ lvconvert_split_and_remove_cache_CMD, lvconvert_split_cache_cmd },
/* lvconvert raid-related type conversions */
{ lvconvert_raid_types_CMD, lvconvert_raid_types_cmd },
/* lvconvert utilities for raid/mirror */
{ lvconvert_split_mirror_images_CMD, lvconvert_split_mirror_images_cmd},
{ lvconvert_change_mirrorlog_CMD, lvconvert_change_mirrorlog_cmd },
{ lvconvert_merge_mirror_images_CMD, lvconvert_merge_mirror_images_cmd },
{ lvconvert_change_region_size_CMD, lvconvert_change_region_size_cmd },
/* redirected to merge_snapshot/merge_thin/merge_mirrors */
{ lvconvert_merge_CMD, lvconvert_merge_cmd },
/* lvconvert VDO pool */
{ lvconvert_to_vdopool_CMD, lvconvert_to_vdopool_cmd },
{ lvconvert_to_vdopool_param_CMD, lvconvert_to_vdopool_param_cmd },
/* lvconvert for integrity */
{ lvconvert_integrity_CMD, lvconvert_integrity_cmd },
/* lvcreate */
{ lvcreate_and_attach_cachevol_for_cache_CMD, lvcreate_and_attach_cache_cmd },
{ lvcreate_and_attach_cachedevice_for_cache_CMD, lvcreate_and_attach_cache_cmd },
{ lvcreate_and_attach_cachevol_for_writecache_CMD, lvcreate_and_attach_writecache_cmd },
{ lvcreate_and_attach_cachedevice_for_writecache_CMD, lvcreate_and_attach_writecache_cmd },
{ pvscan_display_CMD, pvscan_display_cmd },
{ pvscan_cache_CMD, pvscan_cache_cmd },
};
/* Command line args */
unsigned arg_count(const struct cmd_context *cmd, int a)
{
return cmd->opt_arg_values ? cmd->opt_arg_values[a].count : 0;
}
unsigned grouped_arg_count(const struct arg_values *av, int a)
{
return av ? av[a].count : 0;
}
unsigned arg_is_set(const struct cmd_context *cmd, int a)
{
return arg_count(cmd, a) ? 1 : 0;
}
int arg_from_list_is_set(const struct cmd_context *cmd, const char *err_found, ...)
{
int arg;
va_list ap;
va_start(ap, err_found);
while ((arg = va_arg(ap, int)) != -1 && !arg_is_set(cmd, arg))
/* empty */;
va_end(ap);
if (arg == -1)
return 0;
if (err_found)
log_error("%s %s.", arg_long_option_name(arg), err_found);
return 1;
}
int arg_outside_list_is_set(const struct cmd_context *cmd, const char *err_found, ...)
{
int i, arg;
va_list ap;
for (i = 0; i < ARG_COUNT; ++i) {
switch (i) {
/* skip common options */
case commandprofile_ARG:
case config_ARG:
case debug_ARG:
case driverloaded_ARG:
case help2_ARG:
case help_ARG:
case profile_ARG:
case quiet_ARG:
case verbose_ARG:
case version_ARG:
case yes_ARG:
continue;
}
if (!arg_is_set(cmd, i))
continue; /* unset */
va_start(ap, err_found);
while (((arg = va_arg(ap, int)) != -1) && (arg != i))
/* empty */;
va_end(ap);
if (arg == i)
continue; /* set and in list */
if (err_found)
log_error("Option %s %s.", arg_long_option_name(i), err_found);
return 1;
}
return 0;
}
int arg_from_list_is_negative(const struct cmd_context *cmd, const char *err_found, ...)
{
int arg, ret = 0;
va_list ap;
va_start(ap, err_found);
while ((arg = va_arg(ap, int)) != -1)
if (arg_sign_value(cmd, arg, SIGN_NONE) == SIGN_MINUS) {
if (err_found)
log_error("%s %s.", arg_long_option_name(arg), err_found);
ret = 1;
}
va_end(ap);
return ret;
}
int arg_from_list_is_zero(const struct cmd_context *cmd, const char *err_found, ...)
{
int arg, ret = 0;
va_list ap;
va_start(ap, err_found);
while ((arg = va_arg(ap, int)) != -1)
if (arg_is_set(cmd, arg) &&
!arg_int_value(cmd, arg, 0)) {
if (err_found)
log_error("%s %s.", arg_long_option_name(arg), err_found);
ret = 1;
}
va_end(ap);
return ret;
}
unsigned grouped_arg_is_set(const struct arg_values *av, int a)
{
return grouped_arg_count(av, a) ? 1 : 0;
}
const char *arg_long_option_name(int a)
{
return _cmdline.opt_names[a].long_opt;
}
const char *arg_value(const struct cmd_context *cmd, int a)
{
return cmd->opt_arg_values ? cmd->opt_arg_values[a].value : NULL;
}
const char *arg_str_value(const struct cmd_context *cmd, int a, const char *def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].value : def;
}
const char *grouped_arg_str_value(const struct arg_values *av, int a, const char *def)
{
return grouped_arg_count(av, a) ? av[a].value : def;
}
int32_t grouped_arg_int_value(const struct arg_values *av, int a, const int32_t def)
{
return grouped_arg_count(av, a) ? av[a].i_value : def;
}
int32_t first_grouped_arg_int_value(const struct cmd_context *cmd, int a, const int32_t def)
{
struct arg_value_group_list *current_group;
struct arg_values *av;
dm_list_iterate_items(current_group, &cmd->arg_value_groups) {
av = current_group->arg_values;
if (grouped_arg_count(av, a))
return grouped_arg_int_value(av, a, def);
}
return def;
}
int32_t arg_int_value(const struct cmd_context *cmd, int a, const int32_t def)
{
return (_cmdline.opt_names[a].flags & ARG_GROUPABLE) ?
first_grouped_arg_int_value(cmd, a, def) : (arg_is_set(cmd, a) ? cmd->opt_arg_values[a].i_value : def);
}
uint32_t arg_uint_value(const struct cmd_context *cmd, int a, const uint32_t def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].ui_value : def;
}
int64_t arg_int64_value(const struct cmd_context *cmd, int a, const int64_t def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].i64_value : def;
}
uint64_t arg_uint64_value(const struct cmd_context *cmd, int a, const uint64_t def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].ui64_value : def;
}
/* No longer used.
const void *arg_ptr_value(struct cmd_context *cmd, int a, const void *def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].ptr : def;
}
*/
sign_t arg_sign_value(const struct cmd_context *cmd, int a, const sign_t def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].sign : def;
}
percent_type_t arg_percent_value(const struct cmd_context *cmd, int a, const percent_type_t def)
{
return arg_is_set(cmd, a) ? cmd->opt_arg_values[a].percent : def;
}
int arg_count_increment(struct cmd_context *cmd, int a)
{
return cmd->opt_arg_values[a].count++;
}
int yes_no_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
av->sign = SIGN_NONE;
av->percent = PERCENT_NONE;
if (!strcmp(av->value, "y")) {
av->i_value = 1;
av->ui_value = 1;
}
else if (!strcmp(av->value, "n")) {
av->i_value = 0;
av->ui_value = 0;
}
else
return 0;
return 1;
}
int activation_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
av->sign = SIGN_NONE;
av->percent = PERCENT_NONE;
if (!strcmp(av->value, "e") || !strcmp(av->value, "ey") ||
!strcmp(av->value, "ye")) {
av->i_value = CHANGE_AEY;
av->ui_value = CHANGE_AEY;
}
else if (!strcmp(av->value, "s") || !strcmp(av->value, "sy") ||
!strcmp(av->value, "ys")) {
av->i_value = CHANGE_ASY;
av->ui_value = CHANGE_ASY;
}
else if (!strcmp(av->value, "y")) {
av->i_value = CHANGE_AY;
av->ui_value = CHANGE_AY;
}
else if (!strcmp(av->value, "a") || !strcmp(av->value, "ay") ||
!strcmp(av->value, "ya")) {
av->i_value = CHANGE_AAY;
av->ui_value = CHANGE_AAY;
}
else if (!strcmp(av->value, "n") || !strcmp(av->value, "en") ||
!strcmp(av->value, "ne")) {
av->i_value = CHANGE_AN;
av->ui_value = CHANGE_AN;
}
else if (!strcmp(av->value, "ln") || !strcmp(av->value, "nl")) {
av->i_value = CHANGE_ALN;
av->ui_value = CHANGE_ALN;
}
else if (!strcmp(av->value, "ly") || !strcmp(av->value, "yl")) {
av->i_value = CHANGE_ALY;
av->ui_value = CHANGE_ALY;
}
else
return 0;
return 1;
}
int cachemode_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
cache_mode_t mode;
if (!set_cache_mode(&mode, av->value))
return_0;
av->i_value = mode;
av->ui_value = mode;
return 1;
}
int cachemetadataformat_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "auto")) {
av->i_value = CACHE_METADATA_FORMAT_UNSELECTED;
av->ui_value = CACHE_METADATA_FORMAT_UNSELECTED;
} else if (!int_arg(cmd, av))
return_0;
switch (av->i_value) {
case CACHE_METADATA_FORMAT_UNSELECTED:
case CACHE_METADATA_FORMAT_1:
case CACHE_METADATA_FORMAT_2:
return 1;
}
log_error("Selected cache metadata format %d is not supported.", av->i_value);
return 0;
}
int discards_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
thin_discards_t discards;
if (!set_pool_discards(&discards, av->value))
return_0;
av->i_value = discards;
av->ui_value = discards;
return 1;
}
int mirrorlog_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
int log_count;
if (!set_mirror_log_count(&log_count, av->value))
return_0;
av->i_value = log_count;
av->ui_value = log_count;
return 1;
}
int metadatatype_arg(struct cmd_context *cmd, struct arg_values *av)
{
return get_format_by_name(cmd, av->value) ? 1 : 0;
}
static int _get_int_arg(struct arg_values *av, char **ptr)
{
char *val;
unsigned long long v;
av->percent = PERCENT_NONE;
val = av->value;
switch (*val) {
case '+':
av->sign = SIGN_PLUS;
val++;
break;
case '-':
av->sign = SIGN_MINUS;
val++;
break;
default:
av->sign = SIGN_NONE;
}
if (!isdigit(*val))
return 0;
errno = 0;
v = strtoull(val, ptr, 10);
if (*ptr == val || errno)
return 0;
av->i_value = (v < INT32_MAX) ? (int32_t) v : INT32_MAX;
av->ui_value = (v < UINT32_MAX) ? (uint32_t) v : UINT32_MAX;
av->i64_value = (v < INT64_MAX) ? (int64_t) v : INT64_MAX;
av->ui64_value = (v < UINT64_MAX) ? (uint64_t) v : UINT64_MAX;
return 1;
}
static int _get_percent_arg(struct arg_values *av, const char *ptr)
{
if (!strcasecmp(ptr, "V") || !strcasecmp(ptr, "VG"))
av->percent = PERCENT_VG;
else if (!strcasecmp(ptr, "L") || !strcasecmp(ptr, "LV"))
av->percent = PERCENT_LV;
else if (!strcasecmp(ptr, "P") || !strcasecmp(ptr, "PV") ||
!strcasecmp(ptr, "PVS"))
av->percent = PERCENT_PVS;
else if (!strcasecmp(ptr, "F") || !strcasecmp(ptr, "FR") ||
!strcasecmp(ptr, "FREE"))
av->percent = PERCENT_FREE;
else if (!strcasecmp(ptr, "O") || !strcasecmp(ptr, "OR") ||
!strcasecmp(ptr, "ORIGIN"))
av->percent = PERCENT_ORIGIN;
else {
log_error("Specified %%%s is unknown.", ptr);
return 0;
}
return 1;
}
/* Size stored in sectors */
static int _size_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av, int factor, int percent)
{
char *ptr;
int i;
static const char *suffixes = "kmgtpebs";
char *val;
double v;
uint64_t v_tmp, adjustment;
const char *radixchar = nl_langinfo(RADIXCHAR) ? : ".";
av->percent = PERCENT_NONE;
val = av->value;
switch (*val) {
case '+':
av->sign = SIGN_PLUS;
val++;
break;
case '-':
av->sign = SIGN_MINUS;
val++;
break;
default:
av->sign = SIGN_NONE;
}
if (*val == '+' || *val == '-') {
log_error("Multiple sign symbols detected.");
return 0;
}
if (!isdigit(*val) && (*val != '.') && (*val != radixchar[0])) {
log_error("Size requires number argument.");
return 0;
}
errno = 0;
v = strtod(val, &ptr);
if (*ptr == '.' && radixchar[0] != '.') {
/*
* Maybe user has non-C locale with different decimal point ?
* Lets be tolerant and retry with standard C locales
*/
if (setlocale(LC_ALL, "C")) {
errno = 0;
v = strtod(val, &ptr);
setlocale(LC_ALL, "");
}
}
if (ptr == val || errno) {
log_error("Can't parse size argument at '%c'.%s%s", ptr[0], (errno) ? " " :"", (errno) ? strerror(errno) : "");
return 0;
}
if (percent && *ptr == '%') {
if (!_get_percent_arg(av, ++ptr))
return_0;
if ((uint64_t) v >= UINT32_MAX) {
log_error("Percentage is too big (>=%d%%).", UINT32_MAX);
return 0;
}
} else if (*ptr) {
for (i = strlen(suffixes) - 1; i >= 0; i--)
if (suffixes[i] == tolower((int) *ptr))
break;
if (i < 0) {
log_error("Can't parse size argument.");
return 0;
} else if (i == 7) {
/* v is already in sectors */
;
} else if (i == 6) {
/* bytes */
v_tmp = (uint64_t) v;
adjustment = v_tmp % 512;
if (adjustment) {
v_tmp += (512 - adjustment);
log_error("Size is not a multiple of 512. "
"Try using %"PRIu64" or %"PRIu64".",
v_tmp - 512, v_tmp);
return 0;
}
v /= 512;
} else {
/* all other units: kmgtpe */
while (i-- > 0)
v *= 1024;
v *= 2;
}
} else
v *= factor;
/* Compare (double) */
if (v >= (double) (UINT64_MAX >> SECTOR_SHIFT)) {
log_error("Size is too big (>=16EiB).");
return 0;
}
av->i_value = (v < INT32_MAX) ? (int32_t) v : INT32_MAX;
av->ui_value = (v < UINT32_MAX) ? (uint32_t) v : UINT32_MAX;
av->i64_value = (v < INT64_MAX) ? (int64_t) v : INT64_MAX;
av->ui64_value = (v < UINT64_MAX) ? (uint64_t) v : UINT64_MAX;
return 1;
}
/* negative not accepted */
int size_kb_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!_size_arg(cmd, av, 2, 0))
return 0;
if (av->sign == SIGN_MINUS) {
log_error("Size may not be negative.");
return 0;
}
return 1;
}
int ssize_kb_arg(struct cmd_context *cmd, struct arg_values *av)
{
return _size_arg(cmd, av, 2, 0);
}
int size_mb_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!_size_arg(cmd, av, 2048, 0))
return 0;
if ((av->sign == SIGN_MINUS) || (av->sign == SIGN_PLUS)) {
log_error("Size may not be relative/signed.");
return 0;
}
return 1;
}
int ssize_mb_arg(struct cmd_context *cmd, struct arg_values *av)
{
return _size_arg(cmd, av, 2048, 0);
}
int psize_mb_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!_size_arg(cmd, av, 2048, 0))
return 0;
if (av->sign == SIGN_MINUS) {
log_error("Size may not be negative.");
return 0;
}
return 1;
}
int nsize_mb_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!_size_arg(cmd, av, 2048, 0))
return 0;
if (av->sign == SIGN_PLUS) {
log_error("Size may not be positive.");
return 0;
}
return 1;
}
int int_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
char *ptr;
if (!_get_int_arg(av, &ptr) || (*ptr) || (av->sign == SIGN_MINUS))
return 0;
return 1;
}
int uint32_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!int_arg(cmd, av) || (av->ui64_value > UINT32_MAX))
return 0;
return 1;
}
int int_arg_with_sign(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
char *ptr;
if (!_get_int_arg(av, &ptr) || (*ptr))
return 0;
return 1;
}
int int_arg_with_plus(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
char *ptr;
if (!_get_int_arg(av, &ptr) || (*ptr))
return 0;
if (av->sign == SIGN_MINUS) {
log_error("Number may not be negative.");
return 0;
}
return 1;
}
static int _extents_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av)
{
char *ptr;
if (!_get_int_arg(av, &ptr))
return 0;
if (!*ptr)
return 1;
if (*ptr++ != '%')
return 0;
if (!_get_percent_arg(av, ptr))
return_0;
if (av->ui64_value >= UINT32_MAX) {
log_error("Percentage is too big (>=%d%%).", UINT32_MAX);
return 0;
}
return 1;
}
int extents_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av)
{
if (!_extents_arg(cmd, av))
return 0;
if ((av->sign == SIGN_MINUS) || (av->sign == SIGN_PLUS)) {
log_error("Extents may not be relative/signed.");
return 0;
}
return 1;
}
int sextents_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av)
{
return _extents_arg(cmd, av);
}
int pextents_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av)
{
if (!_extents_arg(cmd, av))
return 0;
if (av->sign == SIGN_MINUS) {
log_error("Extents may not be negative.");
return 0;
}
return 1;
}
int nextents_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av)
{
if (!_extents_arg(cmd, av))
return 0;
if (av->sign == SIGN_PLUS) {
log_error("Extents may not be positive.");
return 0;
}
return 1;
}
int string_arg(struct cmd_context *cmd __attribute__((unused)),
struct arg_values *av __attribute__((unused)))
{
return 1;
}
int tag_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
char *pos = av->value;
if (*pos == '@')
pos++;
if (!validate_tag(pos))
return 0;
av->value = pos;
return 1;
}
int permission_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
av->sign = SIGN_NONE;
if ((!strcmp(av->value, "rw")) || (!strcmp(av->value, "wr")))
av->ui_value = LVM_READ | LVM_WRITE;
else if (!strcmp(av->value, "r"))
av->ui_value = LVM_READ;
else
return 0;
return 1;
}
int alloc_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
alloc_policy_t alloc;
av->sign = SIGN_NONE;
alloc = get_alloc_from_string(av->value);
if (alloc == ALLOC_INVALID)
return 0;
av->ui_value = (uint32_t) alloc;
return 1;
}
int locktype_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
lock_type_t lock_type;
av->sign = SIGN_NONE;
lock_type = get_lock_type_from_string(av->value);
if (lock_type == LOCK_TYPE_INVALID)
return 0;
return 1;
}
int segtype_arg(struct cmd_context *cmd, struct arg_values *av)
{
struct segment_type *segtype;
const char *str = (!strcmp(av->value, SEG_TYPE_NAME_LINEAR)) ? SEG_TYPE_NAME_STRIPED : av->value;
if (!(segtype = get_segtype_from_string(cmd, str)))
return_0;
return (!segtype_is_unknown(segtype)) ? 1 : 0;
}
/*
* Positive integer, zero or "auto".
*/
int readahead_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av)
{
if (!strcasecmp(av->value, "auto")) {
av->ui_value = DM_READ_AHEAD_AUTO;
return 1;
}
if (!strcasecmp(av->value, "none")) {
av->ui_value = DM_READ_AHEAD_NONE;
return 1;
}
if (!_size_arg(cmd, av, 1, 0))
return 0;
if (av->sign == SIGN_MINUS)
return 0;
return 1;
}
int regionsize_mb_arg(struct cmd_context *cmd, struct arg_values *av)
{
int pagesize = lvm_getpagesize();
uint32_t num;
if (!_size_arg(cmd, av, 2048, 0))
return 0;
if (av->sign == SIGN_MINUS) {
log_error("Region size may not be negative.");
return 0;
}
if (av->ui64_value > UINT32_MAX) {
log_error("Region size is too big (max %u).", UINT32_MAX);
return 0;
}
num = av->ui_value;
if (!num) {
log_error("Region size may not be zero.");
return 0;
}
if (num % (pagesize >> SECTOR_SHIFT)) {
log_error("Region size must be a multiple of machine memory page size (%d bytes).",
pagesize);
return 0;
}
if (!is_power_of_2(num)) {
log_error("Region size must be a power of 2.");
return 0;
}
return 1;
}
/*
* Non-zero, positive integer, "all", or "unmanaged"
*/
int vgmetadatacopies_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcasecmp(av->value, "all")) {
av->ui_value = VGMETADATACOPIES_ALL;
return 1;
}
if (!strcasecmp(av->value, "unmanaged")) {
av->ui_value = VGMETADATACOPIES_UNMANAGED;
return 1;
}
return int_arg(cmd, av);
}
int pvmetadatacopies_arg(struct cmd_context *cmd, struct arg_values *av)
{
int num;
if (!int_arg(cmd, av))
return 0;
num = av->i_value;
if ((num != 0) && (num != 1) && (num != 2))
return 0;
return 1;
}
int metadatacopies_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strncmp(cmd->name, "pv", 2))
return pvmetadatacopies_arg(cmd, av);
if (!strncmp(cmd->name, "vg", 2))
return vgmetadatacopies_arg(cmd, av);
return 0;
}
int polloperation_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "pvmove") ||
!strcmp(av->value, "convert") ||
!strcmp(av->value, "merge") ||
!strcmp(av->value, "merge_thin"))
return 1;
return 0;
}
int writemostly_arg(struct cmd_context *cmd, struct arg_values *av)
{
/* Could we verify that a PV arg looks like /dev/foo ? */
return 1;
}
int syncaction_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "check") ||
!strcmp(av->value, "repair"))
return 1;
return 0;
}
int reportformat_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "basic") ||
!strcmp(av->value, "json"))
return 1;
return 0;
}
int configreport_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "log") ||
!strcmp(av->value, "vg") ||
!strcmp(av->value, "lv") ||
!strcmp(av->value, "pv") ||
!strcmp(av->value, "pvseg") ||
!strcmp(av->value, "seg"))
return 1;
return 0;
}
int configtype_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "current") ||
!strcmp(av->value, "default") ||
!strcmp(av->value, "diff") ||
!strcmp(av->value, "full") ||
!strcmp(av->value, "list") ||
!strcmp(av->value, "missing") ||
!strcmp(av->value, "new") ||
!strcmp(av->value, "profilable") ||
!strcmp(av->value, "profilable-command") ||
!strcmp(av->value, "profilable-metadata"))
return 1;
return 0;
}
int repairtype_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "pv_header") ||
!strcmp(av->value, "metadata") ||
!strcmp(av->value, "label_header"))
return 1;
return 0;
}
int dumptype_arg(struct cmd_context *cmd, struct arg_values *av)
{
if (!strcmp(av->value, "headers") ||
!strcmp(av->value, "metadata") ||
!strcmp(av->value, "metadata_all") ||
!strcmp(av->value, "metadata_search") ||
!strcmp(av->value, "metadata_area") ||
!strcmp(av->value, "backup_to_raw"))
return 1;
return 0;
}
/*
* FIXME: there's been a confusing mixup among:
* resizeable, resizable, allocatable, allocation.
*
* resizeable and allocatable are the preferred,
* standard option names.
*
* The dispreferred "resizable" is always translated
* to the preferred resizeable.
*
* But, the dispreferred "allocation" name seems
* to translate to either or both resizeable
* and allocatable, it's not clear which.
*/
static int _opt_standard_to_synonym(const char *cmd_name, int opt)
{
switch (opt) {
case mirrorlog_ARG:
return corelog_ARG;
case resizeable_ARG:
return resizable_ARG;
case allocatable_ARG:
return allocation_ARG;
case activate_ARG:
return available_ARG;
case rebuild_ARG:
return raidrebuild_ARG;
case syncaction_ARG:
return raidsyncaction_ARG;
case writemostly_ARG:
return raidwritemostly_ARG;
case minrecoveryrate_ARG:
return raidminrecoveryrate_ARG;
case maxrecoveryrate_ARG:
return raidmaxrecoveryrate_ARG;
case writebehind_ARG:
return raidwritebehind_ARG;
case virtualsize_ARG:
return virtualoriginsize_ARG;
case splitcache_ARG:
return split_ARG;
case pvmetadatacopies_ARG:
if (!strncmp(cmd_name, "pv", 2))
return metadatacopies_ARG;
return 0;
case vgmetadatacopies_ARG:
if (!strncmp(cmd_name, "vg", 2))
return metadatacopies_ARG;
return 0;
}
return 0;
}
static int _opt_synonym_to_standard(const char *cmd_name, int opt)
{
switch (opt) {
case corelog_ARG:
return mirrorlog_ARG;
case resizable_ARG:
return resizeable_ARG;
case allocation_ARG:
return allocatable_ARG;
case available_ARG:
return activate_ARG;
case raidrebuild_ARG:
return rebuild_ARG;
case raidsyncaction_ARG:
return syncaction_ARG;
case raidwritemostly_ARG:
return writemostly_ARG;
case raidminrecoveryrate_ARG:
return minrecoveryrate_ARG;
case raidmaxrecoveryrate_ARG:
return maxrecoveryrate_ARG;
case raidwritebehind_ARG:
return writebehind_ARG;
case virtualoriginsize_ARG:
return virtualsize_ARG;
case split_ARG:
return splitcache_ARG;
case metadatacopies_ARG:
if (!strncmp(cmd_name, "pv", 2))
return pvmetadatacopies_ARG;
if (!strncmp(cmd_name, "vg", 2))
return vgmetadatacopies_ARG;
return 0;
}
return 0;
}
static void _add_getopt_arg(int arg_enum, char **optstrp, struct option **longoptsp);
/*
* The valid args for a command name in general is a union of
* required_opt_args and optional_opt_args for all commands[]
* with the given name.
*/
static void _set_valid_args_for_command_name(int ci)
{
int all_args[ARG_COUNT] = { 0 };
int num_args = 0;
int opt_enum; /* foo_ARG from args.h */
int opt_syn;
int i, ro, oo, io;
int first = 0, last = COMMAND_COUNT - 1, middle;
const char *name = command_names[ci].name;
/* all_args is indexed by the foo_ARG enum vals */
/* Binary search in sorted array of long options (with duplicates) */
while (first <= last) {
middle = first + (last - first) / 2;
if ((i = strcmp(commands_idx[middle]->name, name)) < 0)
first = middle + 1;
else if (i > 0)
last = middle - 1;
else {
/* Matching command found.
* As sorted array contains duplicates, found 1st. and last such cmd. */
i = middle;
while (middle > first && !strcmp(commands_idx[middle - 1]->name, name))
middle--;
while (i < last && !strcmp(commands_idx[i + 1]->name, name))
i++;
last = i;
break;
}
}
while (middle <= last) {
i = commands_idx[middle++]->command_index;
for (ro = 0; ro < (commands[i].ro_count + commands[i].any_ro_count); ro++) {
opt_enum = commands[i].required_opt_args[ro].opt;
all_args[opt_enum] = 1;
}
for (oo = 0; oo < commands[i].oo_count; oo++) {
opt_enum = commands[i].optional_opt_args[oo].opt;
all_args[opt_enum] = 1;
}
for (io = 0; io < commands[i].io_count; io++) {
opt_enum = commands[i].ignore_opt_args[io].opt;
all_args[opt_enum] = 1;
}
}
for (i = 0; i < ARG_COUNT; i++) {
if (all_args[i]) {
opt_enum = _cmdline.opt_names[i].opt_enum;
command_names[ci].valid_args[num_args] = opt_enum;
num_args++;
/* Automatically recognize --extents in addition to --size. */
if (opt_enum == size_ARG) {
command_names[ci].valid_args[num_args] = extents_ARG;
num_args++;
}
/* Recognize synonyms */
if ((opt_syn = _opt_standard_to_synonym(command_names[ci].name, opt_enum))) {
command_names[ci].valid_args[num_args] = opt_syn;
num_args++;
}
/*
* "--allocation" is a weird option that seems to be
* a synonym for either allocatable or resizeable,
* each which already have their own other synonyms,
* so just add allocation whenever either is seen.
*/
if ((opt_enum == allocatable_ARG) || (opt_enum == resizeable_ARG)) {
command_names[ci].valid_args[num_args] = allocation_ARG;
num_args++;
}
}
}
command_names[ci].num_args = num_args;
}
static const struct command_function *_find_command_id_function(int command_enum)
{
int i;
if (!command_enum)
return NULL;
for (i = 0; i < CMD_COUNT; i++) {
if (_command_functions[i].command_enum == command_enum)
return &_command_functions[i];
}
return NULL;
}
static void _unregister_commands(void)
{
_cmdline.commands = NULL;
_cmdline.num_commands = 0;
_cmdline.command_names = NULL;
_cmdline.num_command_names = 0;
memset(&commands, 0, sizeof(commands));
}
static int _command_name_compare(const void *on1, const void *on2)
{
const struct command * const *optname1 = on1;
const struct command * const *optname2 = on2;
return strcmp((*optname1)->name, (*optname2)->name);
}
int lvm_register_commands(struct cmd_context *cmd, const char *run_name)
{
int i;
/* already initialized */
if (_cmdline.commands)
return 1;
memset(&commands, 0, sizeof(commands));
/*
* populate commands[] array with command definitions
* by parsing command-lines.in/command-lines-input.h
*/
if (!define_commands(cmd, run_name)) {
log_error(INTERNAL_ERROR "Failed to parse command definitions.");
return 0;
}
_cmdline.commands = commands;
_cmdline.num_commands = COMMAND_COUNT;
for (i = 0; i < COMMAND_COUNT; i++) {
commands_idx[i] = &commands[i];
commands[i].command_index = i;
commands[i].command_enum = command_id_to_enum(commands[i].command_id);
if (!commands[i].command_enum) {
log_error(INTERNAL_ERROR "Failed to find command id %s.", commands[i].command_id);
_cmdline.commands = NULL;
_cmdline.num_commands = 0;
return 0;
}
/* new style */
commands[i].functions = _find_command_id_function(commands[i].command_enum);
/* old style */
if (!commands[i].functions) {
struct command_name *cname = find_command_name(commands[i].name);
if (cname)
commands[i].fn = cname->fn;
}
}
/* Sort all commands by its name for quick binary search */
qsort(commands_idx, COMMAND_COUNT, sizeof(long), _command_name_compare);
for (i = 0; command_names[i].name; i++)
_set_valid_args_for_command_name(i);
_cmdline.num_command_names = i; /* Also counted how many command entries we have */
_cmdline.command_names = command_names;
return 1;
}
struct lv_prop *get_lv_prop(int lvp_enum)
{
if (!lvp_enum)
return NULL;
return &lv_props[lvp_enum];
}
struct lv_type *get_lv_type(int lvt_enum)
{
if (!lvt_enum)
return NULL;
return &lv_types[lvt_enum];
}
struct command *get_command(int cmd_enum)
{
int i;
for (i = 0; i < COMMAND_COUNT; i++) {
if (commands[i].command_enum == cmd_enum)
return &commands[i];
}
return NULL;
}
/*
* Also see merge_synonym(). The command definitions
* are written using just one variation of the option
* name (opt below). This function checks if the user
* entered a synonym (arg_is_set).
*/
static int _opt_synonym_is_set(struct cmd_context *cmd, int opt_std)
{
int opt_syn = _opt_standard_to_synonym(cmd->name, opt_std);
return opt_syn && arg_is_set(cmd, opt_syn);
}
static int _command_optional_opt_matches(struct cmd_context *cmd, int ci, int oo)
{
int opt_enum = commands[ci].optional_opt_args[oo].opt;
if (val_bit_is_set(commands[ci].optional_opt_args[oo].def.val_bits, conststr_VAL)) {
if (!strcmp(commands[ci].optional_opt_args[oo].def.str, arg_str_value(cmd, opt_enum, "")))
return 1;
return 0;
}
if (val_bit_is_set(commands[ci].optional_opt_args[oo].def.val_bits, constnum_VAL)) {
if (commands[ci].optional_opt_args[oo].def.num == arg_int_value(cmd, opt_enum, 0))
return 1;
return 0;
}
return 1;
}
static int _command_ignore_opt_matches(struct cmd_context *cmd, int ci, int io)
{
int opt_enum = commands[ci].ignore_opt_args[io].opt;
if (val_bit_is_set(commands[ci].ignore_opt_args[io].def.val_bits, conststr_VAL)) {
if (!strcmp(commands[ci].ignore_opt_args[io].def.str, arg_str_value(cmd, opt_enum, "")))
return 1;
return 0;
}
if (val_bit_is_set(commands[ci].ignore_opt_args[io].def.val_bits, constnum_VAL)) {
if (commands[ci].ignore_opt_args[io].def.num == arg_int_value(cmd, opt_enum, 0))
return 1;
return 0;
}
return 1;
}
static int _command_required_opt_matches(struct cmd_context *cmd, int ci, int ro)
{
int opt_enum = commands[ci].required_opt_args[ro].opt;
if (arg_is_set(cmd, opt_enum) || _opt_synonym_is_set(cmd, opt_enum))
goto check_val;
/*
* For some commands, --size and --extents are interchangable,
* but command[] definitions use only --size.
*/
if ((opt_enum == size_ARG) && arg_is_set(cmd, extents_ARG) &&
command_has_alternate_extents(commands[ci].name))
goto check_val;
return 0;
/*
* If the definition requires a literal string or number, check
* that the arg value matches.
*/
check_val:
if (val_bit_is_set(commands[ci].required_opt_args[ro].def.val_bits, conststr_VAL)) {
if (!strcmp(commands[ci].required_opt_args[ro].def.str, arg_str_value(cmd, opt_enum, "")))
return 1;
/* Special case: "raid0" (any raid<N>), matches command def "raid" */
if (!strcmp(commands[ci].required_opt_args[ro].def.str, "raid") &&
!strncmp(arg_str_value(cmd, opt_enum, ""), "raid", 4))
return 1;
return 0;
}
if (val_bit_is_set(commands[ci].required_opt_args[ro].def.val_bits, constnum_VAL)) {
if (commands[ci].required_opt_args[ro].def.num == arg_int_value(cmd, opt_enum, 0))
return 1;
return 0;
}
return 1;
}
static int _command_required_pos_matches(struct cmd_context *cmd, int ci, int rp, char **argv)
{
const char *name;
/*
* rp is the index in required_pos_args[] of the required positional arg.
* The pos values begin with 1, so the first positional arg has
* pos 1, rp 0.
*/
if (argv[rp]) {
/* FIXME: can we match object type better than just checking something exists? */
/* Some cases could be validated by looking at defs.types and at the value. */
return 1;
}
/*
* If Select is specified as a pos arg, then that pos arg can be
* empty if --select is used.
*/
if ((val_bit_is_set(commands[ci].required_pos_args[rp].def.val_bits, select_VAL)) &&
arg_is_set(cmd, select_ARG))
return 1;
/*
* For an lvcreate command with VG as the first required positional arg,
* the VG position is allowed to be empty if --name VG/LV is used, or if the
* LVM_VG_NAME env var is set.
*
* --thinpool|--cachepool|--vdopool VG/LV can also function like --name
* to provide the VG name in place of the positional arg.
*/
if (!strcmp(cmd->name, "lvcreate") &&
(rp == 0) &&
val_bit_is_set(commands[ci].required_pos_args[rp].def.val_bits, vg_VAL) &&
(arg_is_set(cmd, name_ARG) ||
arg_is_set(cmd, thinpool_ARG) ||
arg_is_set(cmd, cachepool_ARG) ||
arg_is_set(cmd, vdopool_ARG) ||
getenv("LVM_VG_NAME"))) {
if (getenv("LVM_VG_NAME"))
return 1;
if ((name = arg_str_value(cmd, name_ARG, NULL))) {
if (strstr(name, "/"))
return 1;
}
if ((name = arg_str_value(cmd, thinpool_ARG, NULL))) {
if (strstr(name, "/"))
return 1;
}
if ((name = arg_str_value(cmd, cachepool_ARG, NULL))) {
if (strstr(name, "/"))
return 1;
}
if ((name = arg_str_value(cmd, vdopool_ARG, NULL)) && strstr(name, "/"))
return 1;
}
return 0;
}
/*
* Return 1 if we should skip this command from consideration.
* This would happen if the command does not include a --type
* option that does not match type_arg.
*/
static int _command_skip_for_type_arg(struct cmd_context *cmd, int ci, const char *type_arg)
{
int ro, oo, opt_enum;
for (ro = 0; ro < (commands[ci].ro_count + commands[ci].any_ro_count); ro++) {
opt_enum = commands[ci].required_opt_args[ro].opt;
if (opt_enum != type_ARG)
continue;
/* SegType keyword in command def matches any type_arg */
if (val_bit_is_set(commands[ci].required_opt_args[ro].def.val_bits, segtype_VAL))
return 0;
if (!commands[ci].required_opt_args[ro].def.str)
return 0;
if (!strcmp(commands[ci].required_opt_args[ro].def.str, type_arg))
return 0;
if (!strncmp(commands[ci].required_opt_args[ro].def.str, "raid", 4) &&
!strncmp(type_arg, "raid", 4))
return 0;
return 1;
}
for (oo = 0; oo < commands[ci].oo_count; oo++) {
opt_enum = commands[ci].optional_opt_args[oo].opt;
if (opt_enum != type_ARG)
continue;
/* SegType keyword in command def matches any type_arg */
if (val_bit_is_set(commands[ci].optional_opt_args[oo].def.val_bits, segtype_VAL))
return 0;
if (!commands[ci].optional_opt_args[oo].def.str)
return 0;
if (!strcmp(commands[ci].optional_opt_args[oo].def.str, type_arg))
return 0;
if (!strncmp(commands[ci].optional_opt_args[oo].def.str, "raid", 4) &&
!strncmp(type_arg, "raid", 4))
return 0;
return 1;
}
return 1;
}
/*
* Match what the user typed with a one specific command definition/prototype
* from commands[]. If nothing matches, it's not a valid command. The match
* is based on command name, required opt args and required pos args.
*
* Find an entry in the commands array that matches based the arg values.
*
* If the cmd has opt or pos args set that are not accepted by command,
* we can: silently ignore them, warn they are not being used, or fail.
* Default should probably be to warn and continue.
*
* For each command[i], check how many required opt/pos args cmd matches.
* Save the command[i] that matches the most.
*
* commands[i].cmd_flags & CMD_FLAG_ANY_REQUIRED_OPT means
* any one item from commands[i].required_opt_args needs to be
* set to match.
*
* required_pos_args[0].types & select_VAL means
* argv[] in that pos can be NULL if arg_is_set(select_ARG)
*/
/* The max number of unused options we keep track of to warn about */
#define MAX_UNUSED_COUNT 8
#define MAX_OPTS_MSG 64
static struct command *_find_command(struct cmd_context *cmd, const char *path, int *argc, char **argv)
{
const char *name;
const char *type_arg = NULL;
char opts_msg[MAX_OPTS_MSG];
char check_opts_msg[MAX_OPTS_MSG];
int match_required, match_ro, match_rp, match_any_ro, match_type, match_unused, mismatch_required;
int best_i = 0, best_required = 0, best_type = 0, best_unused = 0;
int close_i = 0, close_ro = 0, close_type = 0;
int only_i = 0;
int temp_unused_options[MAX_UNUSED_COUNT];
int temp_unused_count;
int best_unused_options[MAX_UNUSED_COUNT] = { 0 };
int best_unused_count = 0;
int opts_match_count, opts_unmatch_count;
int ro, rp;
int i, j;
int opt_enum, opt_i;
int accepted, count;
int variants = 0;
name = last_path_component(path);
/* factor_common_options() is only for usage, so cname->variants is not set. */
for (i = 0; i < COMMAND_COUNT; i++) {
if (strcmp(name, commands[i].name))
continue;
variants++;
}
if (arg_is_set(cmd, type_ARG))
type_arg = arg_str_value(cmd, type_ARG, "");
for (i = 0; i < COMMAND_COUNT; i++) {
if (strcmp(name, commands[i].name))
continue;
if (variants == 1)
only_i = i;
/* For help and version just return the first entry with matching name. */
if (arg_is_set(cmd, help_ARG) || arg_is_set(cmd, help2_ARG) || arg_is_set(cmd, longhelp_ARG) || arg_is_set(cmd, version_ARG))
return &commands[i];
/*
* The 'lvconvert LV' cmd def matches any lvconvert cmd which throws off
* nearest-command partial-match suggestions. Make it a special case so
* that it won't be used as a close match. If the command has any option
* set (other than -v), don't attempt to match it to 'lvconvert LV'.
*/
if (commands[i].command_enum == lvconvert_plain_CMD) {
if (cmd->opt_count - cmd->opt_arg_values[verbose_ARG].count)
continue;
}
/*
* If the cmd def has an implied type, specified in AUTOTYPE,
* then if the user command has --type, it must match.
*/
if (type_arg && commands[i].autotype && strcmp(type_arg, commands[i].autotype))
continue;
if (type_arg && commands[i].autotype2 && strcmp(type_arg, commands[i].autotype2))
continue;
/*
* '--type foo' is special. If the user has set --type foo, then
* we will only look at command defs that include the same --type foo
* (as required or optional). We'll never match some command based
* on *other* (non-type) options, and then at the end complain that
* the user's --type is not accepted.
*/
if (type_arg && _command_skip_for_type_arg(cmd, i, type_arg))
continue;
match_required = 0; /* required parameters that match */
match_ro = 0; /* required opt_args that match */
match_rp = 0; /* required pos_args that match */
match_any_ro = 0;
match_type = 0; /* type arg matches */
match_unused = 0; /* options set that are not accepted by command */
mismatch_required = 0; /* required parameters that do not match */
temp_unused_count = 0;
memset(&temp_unused_options, 0, sizeof(temp_unused_options));
/* if the command name alone is enough, then that's a match */
if (!commands[i].ro_count && !commands[i].rp_count)
match_required = 1;
/* match required_opt_args */
for (ro = 0; ro < commands[i].ro_count; ro++) {
if (_command_required_opt_matches(cmd, i, ro)) {
/* log_warn("match %d ro opt %d", i, commands[i].required_opt_args[ro].opt); */
match_required++;
match_ro++;
if (commands[i].required_opt_args[ro].opt == type_ARG)
match_type = 1;
} else {
/* cmd is missing a required opt arg */
/* log_warn("mismatch %d ro opt %d", i, commands[i].required_opt_args[ro].opt); */
mismatch_required++;
}
}
for (ro = commands[i].ro_count; ro < commands[i].ro_count + commands[i].any_ro_count; ro++) {
if (_command_required_opt_matches(cmd, i, ro)) {
/* log_warn("match %d any ro opt %d", i, commands[i].required_opt_args[ro].opt); */
match_any_ro++;
}
}
if ((commands[i].cmd_flags & CMD_FLAG_ANY_REQUIRED_OPT) && !match_any_ro) {
/* not even one of the any ro is used */
/* log_warn("match %d not one from any", i); */
mismatch_required = 1;
}
/* match required_pos_args */
for (rp = 0; rp < commands[i].rp_count; rp++) {
if (_command_required_pos_matches(cmd, i, rp, argv)) {
/* log_warn("match %d rp %d", i, commands[i].required_pos_args[rp].pos); */
match_required++;
match_rp++;
} else {
/* cmd is missing a required pos arg */
/* log_warn("mismatch %d rp %d", i, commands[i].required_pos_args[rp].pos); */
mismatch_required++;
}
}
/* if cmd is missing any required opt/pos args, it can't be this command. */
if (mismatch_required) {
/* save "closest" command that doesn't match */
if ((match_type && !close_type) ||
((match_type == close_type) && (match_ro > close_ro))) {
close_i = i;
close_ro = match_ro;
close_type = match_type;
}
continue;
}
if (!match_required)
continue;
/* Count the command name as a match if all the required opt/pos args match. */
if ((commands[i].ro_count || commands[i].rp_count) && (match_ro || match_rp))
match_required++;
/* log_warn("command %d has match_required %d match_ro %d match_rp %d",
i, match_required, match_ro, match_rp); */
/* Count how many options cmd has set that are not accepted by commands[i]. */
/* FIXME: also count unused positional args? */
for (opt_i = 0; opt_i < ARG_COUNT; opt_i++) {
if (!arg_is_set(cmd, opt_i))
continue;
if (!(opt_enum = _opt_synonym_to_standard(cmd->name, opt_i)))
opt_enum = opt_i;
/* extents are not used in command definitions */
if (opt_enum == extents_ARG)
continue;
accepted = 0;
/* NB in some cases required_opt_args are optional */
for (j = 0; j < commands[i].ro_count + commands[i].any_ro_count; j++) {
if (commands[i].required_opt_args[j].opt == opt_enum) {
accepted = 1;
break;
}
}
if (accepted)
continue;
for (j = 0; j < commands[i].oo_count; j++) {
if ((commands[i].optional_opt_args[j].opt == opt_enum) &&
_command_optional_opt_matches(cmd, i, j)) {
accepted = 1;
break;
}
}
for (j = 0; j < commands[i].io_count; j++) {
if ((commands[i].ignore_opt_args[j].opt == opt_enum) &&
_command_ignore_opt_matches(cmd, i, j)) {
accepted = 1;
break;
}
}
if (!accepted) {
match_unused++;
if (temp_unused_count < MAX_UNUSED_COUNT)
temp_unused_options[temp_unused_count++] = opt_enum;
}
}
/*
* Choose the best match, which in general is the command with
* the most matching required_{opt,pos}, but it could be a
* command with fewer required_{opt,pos} matches in the case
* where cmddef1 has more required matches, but a match_unused
* and cmddef2 has fewer required matches, but zero match_unused.
*
* A match is better if:
* . more required opt/pos args match
* . type arg matches when other doesn't
* . less unused options
*/
if (!best_required ||
((match_required > best_required) && !match_unused) ||
(match_unused < best_unused) ||
(match_type > best_type) ||
((match_required == best_required) && (match_type == best_type) && (match_unused < best_unused))) {
/* log_warn("best %d has match_required %d match_ro %d match_rp %d",
i, match_required, match_ro, match_rp); */
best_i = i;
best_required = match_required;
best_type = match_type;
best_unused = match_unused;
best_unused_count = temp_unused_count;
memcpy(&best_unused_options, &temp_unused_options, sizeof(best_unused_options));
}
}
if (!best_required) {
/* cmd did not have all the required opt/pos args of any command */
log_error("No command with matching syntax recognised. Run '%s --help' for more information.", name);
if (only_i) {
log_warn("Correct command syntax is:");
print_usage(&_cmdline.commands[only_i], 0, 0);
} else if (close_ro) {
log_warn("Nearest similar command has syntax:");
print_usage(&_cmdline.commands[close_i], 0, 0);
}
return NULL;
}
/*
* If the user passed an option that is not accepted by the matched
* command, then fail.
*
* FIXME: it might be nice to have a config setting that would turn
* these into warnings, and just ignore the unused options.
*/
if (best_unused_count) {
for (i = 0; i < best_unused_count; i++) {
const char *opt_val = NULL;
opt_enum = best_unused_options[i];
opt_val = arg_value(cmd, opt_enum);
log_error("Command does not accept option: %s%s%s.",
arg_long_option_name(opt_enum),
opt_val ? " " : "", opt_val ?: "");
}
return NULL;
}
/*
* If the user provided a positional arg that is not accepted by
* the mached command, then fail.
*
* If the last required_pos_arg or the last optional_pos_arg may repeat,
* then there won't be unused positional args.
*
* FIXME: same question as above, should there be a config setting
* to just warn/ignore about unused positional args?
*/
count = commands[best_i].rp_count;
if (count && (commands[best_i].required_pos_args[count - 1].def.flags & ARG_DEF_FLAG_MAY_REPEAT))
goto out;
count = commands[best_i].op_count;
if (count && (commands[best_i].optional_pos_args[count - 1].def.flags & ARG_DEF_FLAG_MAY_REPEAT))
goto out;
for (count = 0; ; count++) {
if (!argv[count])
break;
if (count >= (commands[best_i].rp_count + commands[best_i].op_count)) {
log_error("Command does not accept argument: %s.", argv[count]);
/* FIXME: to warn/ignore, clear so it can't be used when processing. */
/*
argv[count] = NULL;
(*argc)--;
*/
return NULL;
}
}
out:
/*
* Check any rules related to option combinations.
* Other rules are checked after VG is read.
*/
for (i = 0; i < commands[best_i].rule_count; i++) {
struct cmd_rule *rule;
rule = &commands[best_i].rules[i];
/*
* The rule wants to validate options (check_opts). That can be
* done here if the only qualification for the validation is
* other options (and not specific LV type or LV property which
* are not known here.)
*/
if (rule->check_opts_count && !rule->lvt_bits && !rule->lvp_bits) {
/*
* When no opt is specified for applying the rule, then
* the rule is always applied, otherwise the rule is
* applied when the specific option is set.
*/
if (rule->opts_count &&
!opt_in_list_is_set(cmd, rule->opts, rule->opts_count, NULL, NULL))
continue;
opt_in_list_is_set(cmd, rule->check_opts, rule->check_opts_count,
&opts_match_count, &opts_unmatch_count);
if (opts_match_count && (rule->rule == RULE_INVALID)) {
memset(opts_msg, 0, sizeof(opts_msg));
memset(check_opts_msg, 0, sizeof(check_opts_msg));
if (rule->opts_count)
opt_array_to_str(cmd, rule->opts, rule->opts_count, opts_msg, sizeof(opts_msg));
opt_array_to_str(cmd, rule->check_opts, rule->check_opts_count, check_opts_msg, sizeof(check_opts_msg));
if (rule->opts_count)
log_error("Command does not accept option combination: %s with %s", opts_msg, check_opts_msg);
else
log_error("Command does not accept options: %s", check_opts_msg);
return NULL;
}
if (opts_unmatch_count && (rule->rule == RULE_REQUIRE)) {
memset(check_opts_msg, 0, sizeof(check_opts_msg));
opt_array_to_str(cmd, rule->check_opts, rule->check_opts_count, check_opts_msg, sizeof(check_opts_msg));
log_error("Command requires options: %s", check_opts_msg);
return NULL;
}
}
}
log_debug("Recognised command %s (id %d / enum %d).",
commands[best_i].command_id, best_i, commands[best_i].command_enum);
log_command(cmd->cmd_line, commands[best_i].name, commands[best_i].command_id);
return &commands[best_i];
}
static void _short_usage(const char *name)
{
log_error("Run `%s --help' for more information.", name);
}
static int _usage(const char *name, int longhelp, int skip_notes)
{
struct command_name *cname = find_command_name(name);
struct command *cmd = NULL;
int show_full = longhelp;
int i;
if (!cname) {
log_print("%s: no such command.", name);
return 0;
}
configure_command_option_values(name);
/*
* Looks at all variants of each command name and figures out
* which options are common to all variants (for compact output)
*/
factor_common_options();
log_print("%s - %s\n", name, cname->desc);
/* Reduce the default output when there are several variants. */
if (cname->variants < 3)
show_full = 1;
for (i = 0; i < COMMAND_COUNT; i++) {
if (strcmp(_cmdline.commands[i].name, name))
continue;
if (_cmdline.commands[i].cmd_flags & CMD_FLAG_PREVIOUS_SYNTAX)
continue;
if ((_cmdline.commands[i].cmd_flags & CMD_FLAG_SECONDARY_SYNTAX) && !show_full)
continue;
log_very_verbose("Command definition index %d enum %d id %s",
_cmdline.commands[i].command_index,
_cmdline.commands[i].command_enum,
_cmdline.commands[i].command_id);
print_usage(&_cmdline.commands[i], 1, 1);
cmd = &_cmdline.commands[i];
}
/* Common options are printed once for all variants of a command name. */
if (!cmd) {
log_error(INTERNAL_ERROR "Command %s not found.", name);
return 0;
}
print_usage_common_cmd(cname, cmd);
print_usage_common_lvm(cname, cmd);
if (skip_notes)
return 1;
if (longhelp)
print_usage_notes(cname);
else
log_print("Use --longhelp to show all options and advanced commands.");
return 1;
}
static void _usage_all(void)
{
int i;
for (i = 0; command_names[i].name; i++)
_usage(command_names[i].name, 1, 1);
print_usage_notes(NULL);
}
/*
* Sets up the arguments to pass to getopt_long().
*
* getopt_long() takes a string of short option characters
* where the char is followed by ":" if the option takes an arg,
* e.g. "abc:d:" This string is created in optstrp.
*
* getopt_long() also takes an array of struct option which
* has the name of the long option, if it takes an arg, etc,
* e.g.
*
* option long_options[] = {
* { "foo", required_argument, 0, 0 },
* { "bar", no_argument, 0, 'b' }
* };
*
* this array is created in longoptsp.
*
* Original comment:
* Sets up the short and long argument. If there
* is no short argument then the index of the
* argument in the the_args array is set as the
* long opt value. Yuck. Of course this means we
* can't have more than 'a' long arguments.
*/
static void _add_getopt_arg(int opt_enum, char **optstrp, struct option **longoptsp)
{
struct opt_name *a = _cmdline.opt_names + opt_enum;
if (a->short_opt) {
*(*optstrp)++ = a->short_opt;
if (a->val_enum)
*(*optstrp)++ = ':';
}
#ifdef HAVE_GETOPTLONG
/* long_arg is "--foo", so +2 is the offset of the name after "--" */
if (*(a->long_opt + 2)) {
(*longoptsp)->name = a->long_opt + 2;
(*longoptsp)->has_arg = a->val_enum ? 1 : 0;
(*longoptsp)->flag = NULL;
/*
* When getopt_long() sees an option that has an associated
* single letter, it returns the ascii value of that letter.
* e.g. getopt_long() returns 100 for '-d' or '--debug'
* (100 is the ascii value of 'd').
*
* When getopt_long() sees an option that does not have an
* associated single letter, it returns the value of the
* the enum for that long option name plus 128.
* e.g. getopt_long() returns 139 for --cachepool
* (11 is the enum value for --cachepool, so 11+128)
*/
if (a->short_opt)
(*longoptsp)->val = a->short_opt;
else
(*longoptsp)->val = opt_enum + 128;
(*longoptsp)++;
}
#endif
}
/*
* getopt_long() has returned goval which indicates which option it's found.
* We need to translate that goval to an enum value from the args array.
*
* For options with both long and short forms, goval is the character value
* of the short option. For options with only a long form, goval is the
* corresponding enum value plus 128.
*
* The trick with character values is that different long options share the
* same single-letter short form. So, we have to translate goval to an
* enum using only the set of valid options for the given command. And,
* a command name is not allowed to use two different long options that
* have the same single-letter short form.
*/
static int _find_arg(const char *cmd_name, int goval)
{
struct command_name *cname;
int arg_enum;
int i;
if (!(cname = find_command_name(cmd_name)))
return -1;
for (i = 0; i < cname->num_args; i++) {
arg_enum = cname->valid_args[i];
/* assert arg_enum == _cmdline.opt_names[arg_enum].arg_enum */
/* the value returned by getopt matches the ascii value of single letter option */
if (_cmdline.opt_names[arg_enum].short_opt && (goval == _cmdline.opt_names[arg_enum].short_opt))
return arg_enum;
/* the value returned by getopt matches the enum value plus 128 */
if (!_cmdline.opt_names[arg_enum].short_opt && (goval == (arg_enum + 128)))
return arg_enum;
}
return -1;
}
static int _process_command_line(struct cmd_context *cmd, int *argc, char ***argv)
{
char str[((ARG_COUNT + 1) * 2) + 1], *ptr = str;
struct option opts[ARG_COUNT + 1], *o = opts;
struct opt_name *a;
struct arg_values *av;
struct arg_value_group_list *current_group = NULL;
int arg_enum; /* e.g. foo_ARG */
int goval; /* the number returned from getopt_long identifying what it found */
int i;
if (!(cmd->opt_arg_values = dm_pool_zalloc(cmd->mem, sizeof(*cmd->opt_arg_values) * ARG_COUNT))) {
log_fatal("Unable to allocate memory for command line arguments.");
return 0;
}
/*
* create the short-form character array (str) and the long-form option
* array (opts) to pass to the getopt_long() function. IOW we generate
* the arguments to pass to getopt_long() from the opt_names data.
*/
if (cmd->cname)
for (i = 0; i < cmd->cname->num_args; i++)
_add_getopt_arg(cmd->cname->valid_args[i], &ptr, &o);
*ptr = '\0';
memset(o, 0, sizeof(*o));
optarg = (char*) "";
optind = OPTIND_INIT;
while ((goval = GETOPTLONG_FN(*argc, *argv, str, opts, NULL)) >= 0) {
if (goval == '?')
return 0;
cmd->opt_count++;
/*
* translate the option value used by getopt into the enum
* value (e.g. foo_ARG) from the args array.
*/
if ((arg_enum = _find_arg(cmd->name, goval)) < 0) {
log_fatal("Unrecognised option %d (%c).", goval, goval);
return 0;
}
a = _cmdline.opt_names + arg_enum;
av = &cmd->opt_arg_values[arg_enum];
if (a->flags & ARG_GROUPABLE) {
/*
* Start a new group of arguments:
* - the first time,
* - or if a non-countable argument is repeated,
* - or if argument has higher priority than current group.
*/
if (!current_group ||
(current_group->arg_values[arg_enum].count && !(a->flags & ARG_COUNTABLE)) ||
(current_group->prio < a->prio)) {
/* FIXME Reduce size including only groupable args */
if (!(current_group = dm_pool_zalloc(cmd->mem, sizeof(struct arg_value_group_list) + sizeof(*cmd->opt_arg_values) * ARG_COUNT))) {
log_fatal("Unable to allocate memory for command line arguments.");
return 0;
}
current_group->prio = a->prio;
dm_list_add(&cmd->arg_value_groups, &current_group->list);
}
/* Maintain total argument count as well as count within each group */
av->count++;
av = &current_group->arg_values[arg_enum];
}
if (av->count && !(a->flags & ARG_COUNTABLE)) {
log_error("Option%s%c%s%s may not be repeated.",
a->short_opt ? " -" : "",
a->short_opt ? : ' ',
(a->short_opt && a->long_opt) ?
"/" : "", a->long_opt ? : "");
return 0;
}
if (a->val_enum) {
if (!optarg) {
log_error("Option requires argument.");
return 0;
}
av->value = optarg;
if (!val_names[a->val_enum].fn(cmd, av)) {
log_error("Invalid argument for %s: %s", a->long_opt, optarg);
return 0;
}
}
av->count++;
}
*argc -= optind;
*argv += optind;
return 1;
}
static void _copy_arg_values(struct arg_values *av, int oldarg, int newarg)
{
const struct arg_values *old = av + oldarg;
struct arg_values *new = av + newarg;
new->count = old->count;
new->value = old->value;
new->i_value = old->i_value;
new->ui_value = old->ui_value;
new->i64_value = old->i64_value;
new->ui64_value = old->ui64_value;
new->sign = old->sign;
}
static int _merge_synonym(struct cmd_context *cmd, int oldarg, int newarg)
{
struct arg_values *av;
struct arg_value_group_list *current_group;
if (arg_is_set(cmd, oldarg) && arg_is_set(cmd, newarg)) {
log_error("%s and %s are synonyms. Please only supply one.",
_cmdline.opt_names[oldarg].long_opt, _cmdline.opt_names[newarg].long_opt);
return 0;
}
/* Not groupable? */
if (!(_cmdline.opt_names[oldarg].flags & ARG_GROUPABLE)) {
if (arg_is_set(cmd, oldarg))
_copy_arg_values(cmd->opt_arg_values, oldarg, newarg);
return 1;
}
if (arg_is_set(cmd, oldarg))
cmd->opt_arg_values[newarg].count = cmd->opt_arg_values[oldarg].count;
/* Groupable */
dm_list_iterate_items(current_group, &cmd->arg_value_groups) {
av = current_group->arg_values;
if (!grouped_arg_count(av, oldarg))
continue;
_copy_arg_values(av, oldarg, newarg);
}
return 1;
}
int systemid(struct cmd_context *cmd __attribute__((unused)),
int argc __attribute__((unused)),
char **argv __attribute__((unused)))
{
log_print("system ID: %s", cmd->system_id ? : "");
return ECMD_PROCESSED;
}
int version(struct cmd_context *cmd __attribute__((unused)),
int argc __attribute__((unused)),
char **argv __attribute__((unused)))
{
char vsn[80];
log_print("LVM version: %s", LVM_VERSION);
if (library_version(vsn, sizeof(vsn)))
log_print("Library version: %s", vsn);
if (driver_version(vsn, sizeof(vsn)))
log_print("Driver version: %s", vsn);
log_print("Configuration: %s", LVM_CONFIGURE_LINE);
return ECMD_PROCESSED;
}
static void _reset_current_settings_to_default(struct cmd_context *cmd)
{
cmd->current_settings = cmd->default_settings;
}
static void _get_current_output_settings_from_args(struct cmd_context *cmd)
{
if (arg_is_set(cmd, udevoutput_ARG)) {
cmd->current_settings.suppress = 1;
cmd->udevoutput = 1;
}
if (arg_is_set(cmd, debug_ARG))
cmd->current_settings.debug = _LOG_FATAL + (arg_count(cmd, debug_ARG) - 1);
if (arg_is_set(cmd, verbose_ARG))
cmd->current_settings.verbose = arg_count(cmd, verbose_ARG);
if (arg_is_set(cmd, quiet_ARG)) {
cmd->current_settings.debug = 0;
cmd->current_settings.verbose = 0;
cmd->current_settings.silent = (arg_count(cmd, quiet_ARG) > 1) ? 1 : 0;
}
/*
* default_settings.journal is already set from config and has already been
* applied using init_log_journal().
* current_settings have been set to default_settings.
* now --journal value adds to current_settings.
*/
if (arg_is_set(cmd, journal_ARG))
cmd->current_settings.journal |= log_journal_str_to_val(arg_str_value(cmd, journal_ARG, ""));
}
static void _apply_current_output_settings(struct cmd_context *cmd)
{
log_suppress(cmd->current_settings.suppress);
init_debug(cmd->current_settings.debug);
init_debug_classes_logged(cmd->default_settings.debug_classes);
init_verbose(cmd->current_settings.verbose + VERBOSE_BASE_LEVEL);
init_silent(cmd->current_settings.silent);
init_log_journal(cmd->current_settings.journal);
}
static int _read_devices_list(struct cmd_context *cmd)
{
struct arg_value_group_list *group;
const char *names;
struct dm_list *names_list;
dm_list_iterate_items(group, &cmd->arg_value_groups) {
if (!grouped_arg_is_set(group->arg_values, devices_ARG))
continue;
if (!(names = (char *)grouped_arg_str_value(group->arg_values, devices_ARG, NULL)))
continue;
if (!strchr(names, ',')) {
if (!str_list_add(cmd->mem, &cmd->deviceslist, names))
return 0;
} else {
if ((names_list = str_to_str_list(cmd->mem, names, ",", 1)))
dm_list_splice(&cmd->deviceslist, names_list);
}
}
return 1;
}
static int _get_current_settings(struct cmd_context *cmd)
{
const char *activation_mode;
const char *hint_mode;
const char *search_mode;
_get_current_output_settings_from_args(cmd);
if (arg_is_set(cmd, test_ARG))
cmd->current_settings.test = arg_is_set(cmd, test_ARG);
cmd->current_settings.yes = arg_count(cmd, yes_ARG);
if (arg_is_set(cmd, driverloaded_ARG)) {
cmd->current_settings.activation =
arg_int_value(cmd, driverloaded_ARG,
cmd->default_settings.activation);
}
cmd->current_settings.archive = arg_int_value(cmd, autobackup_ARG, cmd->current_settings.archive);
cmd->current_settings.backup = arg_int_value(cmd, autobackup_ARG, cmd->current_settings.backup);
if (arg_is_set(cmd, readonly_ARG)) {
cmd->current_settings.activation = 0;
cmd->current_settings.archive = 0;
cmd->current_settings.backup = 0;
}
if (cmd->cname->flags & LOCKD_VG_SH)
cmd->lockd_vg_default_sh = 1;
if (cmd->cname->flags & CAN_USE_ONE_SCAN)
cmd->can_use_one_scan = 1;
cmd->include_exported_vgs = (cmd->cname->flags & ALLOW_EXPORTED) ? 1 : 0;
cmd->scan_lvs = find_config_tree_bool(cmd, devices_scan_lvs_CFG, NULL);
cmd->allow_mixed_block_sizes = find_config_tree_bool(cmd, devices_allow_mixed_block_sizes_CFG, NULL);
cmd->check_devs_used = (cmd->cname->flags & CHECK_DEVS_USED) ? 1 : 0;
cmd->print_device_id_not_found = (cmd->cname->flags & DEVICE_ID_NOT_FOUND) ? 1 : 0;
/*
* enable_hints is set to 1 if any commands are using hints.
* use_hints is set to 1 if this command should use the hints.
* enable_hints=1 and use_hints=0 means that this command won't
* use the hints, but it may invalidate the hints that are used
* by other commands.
*
* enable_hints=0 means no commands are using hints, so this
* command would not need to invalidate hints for other cmds.
*
* Code should check !enable_hints before checking use_hints.
*/
cmd->enable_hints = 1;
/* Only certain commands need to be optimized by using hints. */
if (cmd->cname->flags & ALLOW_HINTS)
cmd->use_hints = 1;
else
cmd->use_hints = 0;
/* The hints file is associated with the default/system devices file. */
if (arg_is_set(cmd, devicesfile_ARG) || arg_is_set(cmd, devices_ARG))
cmd->use_hints = 0;
/*
* During system init, hints are repeatedly invalidated due to PVs
* appearing, so it's wasted effort to try to maintain hints.
* Hints are only effective when devices are in a steady-state.
*/
if (arg_is_set(cmd, sysinit_ARG))
cmd->use_hints = 0;
/*
* Don't use hints from this command, but enable_hints will
* remain set unless hints=none in the config. See above re
* the meaning of use_hints=0 && enable_hints=1.
*/
if (arg_is_set(cmd, nohints_ARG))
cmd->use_hints = 0;
if ((hint_mode = find_config_tree_str(cmd, devices_hints_CFG, NULL))) {
if (!strcmp(hint_mode, "none")) {
cmd->enable_hints = 0;
cmd->use_hints = 0;
}
}
cmd->partial_activation = 0;
cmd->degraded_activation = 0;
activation_mode = find_config_tree_str(cmd, activation_mode_CFG, NULL);
if (!activation_mode)
activation_mode = DEFAULT_ACTIVATION_MODE;
if (arg_is_set(cmd, activationmode_ARG)) {
activation_mode = arg_str_value(cmd, activationmode_ARG,
activation_mode);
/* complain only if the two arguments conflict */
if (arg_is_set(cmd, partial_ARG) &&
strcmp(activation_mode, "partial")) {
log_error("--partial and --activationmode are mutually"
" exclusive arguments");
return EINVALID_CMD_LINE;
}
} else if (arg_is_set(cmd, partial_ARG))
activation_mode = "partial";
if (!strcmp(activation_mode, "partial")) {
cmd->partial_activation = 1;
log_warn("PARTIAL MODE. Incomplete logical volumes will be processed.");
} else if (!strcmp(activation_mode, "degraded"))
cmd->degraded_activation = 1;
else if (strcmp(activation_mode, "complete")) {
log_error("Invalid activation mode given.");
return EINVALID_CMD_LINE;
}
cmd->include_foreign_vgs = arg_is_set(cmd, foreign_ARG) ? 1 : 0;
cmd->include_shared_vgs = arg_is_set(cmd, shared_ARG) ? 1 : 0;
cmd->include_historical_lvs = arg_is_set(cmd, history_ARG) ? 1 : 0;
cmd->record_historical_lvs = find_config_tree_bool(cmd, metadata_record_lvs_history_CFG, NULL) ?
(arg_is_set(cmd, nohistory_ARG) ? 0 : 1) : 0;
if (!(search_mode = find_config_tree_str(cmd, devices_search_for_devnames_CFG, NULL)))
cmd->search_for_devnames = DEFAULT_SEARCH_FOR_DEVNAMES;
else {
if (!strcmp(search_mode, "none") || !strcmp(search_mode, "auto") || !strcmp(search_mode, "all"))
cmd->search_for_devnames = search_mode;
else {
log_warn("Ignoring unknown search_for_devnames setting, using %s.", DEFAULT_SEARCH_FOR_DEVNAMES);
cmd->search_for_devnames = DEFAULT_SEARCH_FOR_DEVNAMES;
}
}
if (arg_is_set(cmd, devicesfile_ARG)) {
const char *devices_file = arg_str_value(cmd, devicesfile_ARG, NULL);
if (devices_file && !strlen(devices_file)) {
cmd->devicesfile = "";
} else if (!devices_file || !validate_name(devices_file)) {
log_error("Invalid devices file name.");
return EINVALID_CMD_LINE;
} else if (!(cmd->devicesfile = dm_pool_strdup(cmd->libmem, devices_file))) {
log_error("Failed to copy devices file name.");
return EINVALID_CMD_LINE;
}
}
dm_list_init(&cmd->deviceslist);
if (arg_is_set(cmd, devices_ARG)) {
if (cmd->devicesfile && strlen(cmd->devicesfile)) {
log_error("A --devices list cannot be used with --devicesfile.");
return EINVALID_CMD_LINE;
}
cmd->enable_devices_list = 1;
if (!_read_devices_list(cmd)) {
log_error("Failed to read --devices args.");
return EINVALID_CMD_LINE;
}
}
/*
* This is set to zero by process_each which wants to print errors
* itself rather than having them printed in vg_read.
*/
cmd->vg_read_print_access_error = 1;
if (arg_is_set(cmd, nosuffix_ARG))
cmd->current_settings.suffix = 0;
if (arg_is_set(cmd, units_ARG))
if (!(cmd->current_settings.unit_factor =
dm_units_to_factor(arg_str_value(cmd, units_ARG, ""),
&cmd->current_settings.unit_type, 1, NULL))) {
log_error("Invalid units specification");
return EINVALID_CMD_LINE;
}
if (arg_is_set(cmd, binary_ARG))
cmd->report_binary_values_as_numeric = 1;
if (arg_is_set(cmd, noudevsync_ARG))
cmd->current_settings.udev_sync = 0;
/* Handle synonyms */
if (!_merge_synonym(cmd, resizable_ARG, resizeable_ARG) ||
!_merge_synonym(cmd, allocation_ARG, allocatable_ARG) ||
!_merge_synonym(cmd, allocation_ARG, resizeable_ARG) ||
!_merge_synonym(cmd, virtualoriginsize_ARG, virtualsize_ARG) ||
!_merge_synonym(cmd, available_ARG, activate_ARG) ||
!_merge_synonym(cmd, raidrebuild_ARG, rebuild_ARG) ||
!_merge_synonym(cmd, raidsyncaction_ARG, syncaction_ARG) ||
!_merge_synonym(cmd, raidwritemostly_ARG, writemostly_ARG) ||
!_merge_synonym(cmd, raidminrecoveryrate_ARG, minrecoveryrate_ARG) ||
!_merge_synonym(cmd, raidmaxrecoveryrate_ARG, maxrecoveryrate_ARG) ||
!_merge_synonym(cmd, raidwritebehind_ARG, writebehind_ARG))
return EINVALID_CMD_LINE;
if ((!strncmp(cmd->name, "pv", 2) &&
!_merge_synonym(cmd, metadatacopies_ARG, pvmetadatacopies_ARG)) ||
(!strncmp(cmd->name, "vg", 2) &&
!_merge_synonym(cmd, metadatacopies_ARG, vgmetadatacopies_ARG)))
return EINVALID_CMD_LINE;
/* Zero indicates success */
return 0;
}
static int _process_common_commands(struct cmd_context *cmd)
{
if (arg_is_set(cmd, help_ARG) ||
arg_is_set(cmd, longhelp_ARG) ||
arg_is_set(cmd, help2_ARG)) {
_usage(cmd->name, arg_is_set(cmd, longhelp_ARG), 0);
return ECMD_PROCESSED;
}
if (arg_is_set(cmd, version_ARG)) {
return version(cmd, 0, (char **) NULL);
}
/* Zero indicates it's OK to continue processing this command */
return 0;
}
static void _display_help(void)
{
int i;
log_error("Available lvm commands:");
log_error("Use 'lvm help <command>' for more information");
log_error(" ");
for (i = 0; i < _cmdline.num_command_names; i++) {
struct command_name *cname = _cmdline.command_names + i;
log_error("%-16.16s%s", cname->name, cname->desc);
}
}
int help(struct cmd_context *cmd __attribute__((unused)), int argc, char **argv)
{
int ret = ECMD_PROCESSED;
if (!argc)
_display_help();
else if (argc == 1 && !strcmp(argv[0], "all"))
_usage_all();
else {
int i;
for (i = 0; i < argc; i++)
if (!_usage(argv[i], 0, 0))
ret = EINVALID_CMD_LINE;
}
return ret;
}
static void _apply_current_settings(struct cmd_context *cmd)
{
_apply_current_output_settings(cmd);
init_test(cmd->current_settings.test);
init_mirror_in_sync(0);
init_dmeventd_monitor(DEFAULT_DMEVENTD_MONITOR);
init_msg_prefix(cmd->default_settings.msg_prefix);
archive_enable(cmd, cmd->current_settings.archive);
backup_enable(cmd, cmd->current_settings.backup);
set_activation(cmd->current_settings.activation, cmd->metadata_read_only);
cmd->fmt = get_format_by_name(cmd, arg_str_value(cmd, metadatatype_ARG,
cmd->current_settings.fmt_name));
cmd->handles_missing_pvs = 0;
}
static const char *_copy_command_line(struct cmd_context *cmd, int argc, char **argv)
{
int i, space;
/*
* Build up the complete command line, used as a
* description for backups.
*/
if (!dm_pool_begin_object(cmd->mem, 128))
goto_bad;
for (i = 0; i < argc; i++) {
space = strchr(argv[i], ' ') ? 1 : 0;
if (space && !dm_pool_grow_object(cmd->mem, "'", 1))
goto_bad;
if (!dm_pool_grow_object(cmd->mem, argv[i], strlen(argv[i])))
goto_bad;
if (space && !dm_pool_grow_object(cmd->mem, "'", 1))
goto_bad;
if (i < (argc - 1))
if (!dm_pool_grow_object(cmd->mem, " ", 1))
goto_bad;
}
/*
* Terminate.
*/
if (!dm_pool_grow_object(cmd->mem, "\0", 1))
goto_bad;
return dm_pool_end_object(cmd->mem);
bad:
log_error("Couldn't copy command line.");
dm_pool_abandon_object(cmd->mem);
return NULL;
}
static int _prepare_profiles(struct cmd_context *cmd)
{
static const char COMMAND_PROFILE_ENV_VAR_NAME[] = "LVM_COMMAND_PROFILE";
static const char _cmd_profile_arg_preferred_over_env_var_msg[] = "Giving "
"preference to command profile specified on command "
"line over the one specified via environment variable.";
static const char _failed_to_add_profile_msg[] = "Failed to add %s %s.";
static const char _failed_to_apply_profile_msg[] = "Failed to apply %s %s.";
static const char _command_profile_source_name[] = "command profile";
static const char _metadata_profile_source_name[] = "metadata profile";
static const char _setting_global_profile_msg[] = "Setting global %s \"%s\".";
const char *env_cmd_profile_name = NULL;
const char *name;
struct profile *profile;
config_source_t source;
const char *source_name;
/* Check whether default global command profile is set via env. var. */
if ((env_cmd_profile_name = getenv(COMMAND_PROFILE_ENV_VAR_NAME))) {
if (!*env_cmd_profile_name)
env_cmd_profile_name = NULL;
else
log_debug("Command profile '%s' requested via "
"environment variable.",
env_cmd_profile_name);
}
if (!arg_is_set(cmd, profile_ARG) &&
!arg_is_set(cmd, commandprofile_ARG) &&
!arg_is_set(cmd, metadataprofile_ARG) &&
!env_cmd_profile_name)
/* nothing to do */
return 1;
if (arg_is_set(cmd, profile_ARG)) {
/*
* If --profile is used with dumpconfig, it's used
* to dump the profile without the profile being applied.
*/
if (!strcmp(cmd->command->name, "dumpconfig") ||
!strcmp(cmd->command->name, "lvmconfig") ||
!strcmp(cmd->command->name, "config"))
return 1;
/*
* If --profile is used with lvcreate/lvchange/vgchange,
* it's recognized as shortcut to --metadataprofile.
* The --commandprofile is assumed otherwise.
*/
if (!strcmp(cmd->command->name, "lvcreate") ||
!strcmp(cmd->command->name, "lvconvert") ||
!strcmp(cmd->command->name, "vgcreate") ||
!strcmp(cmd->command->name, "lvchange") ||
!strcmp(cmd->command->name, "vgchange")) {
if (arg_is_set(cmd, metadataprofile_ARG)) {
log_error("Only one of --profile or "
" --metadataprofile allowed.");
return 0;
}
source = CONFIG_PROFILE_METADATA;
source_name = _metadata_profile_source_name;
}
else {
if (arg_is_set(cmd, commandprofile_ARG)) {
log_error("Only one of --profile or "
"--commandprofile allowed.");
return 0;
}
/*
* Prefer command profile specified on command
* line over the profile specified via
* COMMAND_PROFILE_ENV_VAR_NAME env. var.
*/
if (env_cmd_profile_name) {
log_debug(_cmd_profile_arg_preferred_over_env_var_msg);
env_cmd_profile_name = NULL;
}
source = CONFIG_PROFILE_COMMAND;
source_name = _command_profile_source_name;
}
name = arg_str_value(cmd, profile_ARG, NULL);
if (!(profile = add_profile(cmd, name, source))) {
log_error(_failed_to_add_profile_msg, source_name, name);
return 0;
}
if (source == CONFIG_PROFILE_COMMAND) {
log_debug(_setting_global_profile_msg, _command_profile_source_name, profile->name);
cmd->profile_params->global_command_profile = profile;
} else if (source == CONFIG_PROFILE_METADATA) {
log_debug(_setting_global_profile_msg, _metadata_profile_source_name, profile->name);
/* This profile will override any VG/LV-based profile if present */
cmd->profile_params->global_metadata_profile = profile;
}
remove_config_tree_by_source(cmd, source);
if (!override_config_tree_from_profile(cmd, profile)) {
log_error(_failed_to_apply_profile_msg, source_name, name);
return 0;
}
}
if (arg_is_set(cmd, commandprofile_ARG) || env_cmd_profile_name) {
if (arg_is_set(cmd, commandprofile_ARG)) {
/*
* Prefer command profile specified on command
* line over the profile specified via
* COMMAND_PROFILE_ENV_VAR_NAME env. var.
*/
if (env_cmd_profile_name)
log_debug(_cmd_profile_arg_preferred_over_env_var_msg);
name = arg_str_value(cmd, commandprofile_ARG, NULL);
} else
name = env_cmd_profile_name;
source_name = _command_profile_source_name;
if (!(profile = add_profile(cmd, name, CONFIG_PROFILE_COMMAND))) {
log_error(_failed_to_add_profile_msg, source_name, name);
return 0;
}
remove_config_tree_by_source(cmd, CONFIG_PROFILE_COMMAND);
if (!override_config_tree_from_profile(cmd, profile)) {
log_error(_failed_to_apply_profile_msg, source_name, name);
return 0;
}
log_debug(_setting_global_profile_msg, _command_profile_source_name, profile->name);
cmd->profile_params->global_command_profile = profile;
if (!cmd->opt_arg_values)
cmd->profile_params->shell_profile = profile;
}
if (arg_is_set(cmd, metadataprofile_ARG)) {
name = arg_str_value(cmd, metadataprofile_ARG, NULL);
source_name = _metadata_profile_source_name;
if (!(profile = add_profile(cmd, name, CONFIG_PROFILE_METADATA))) {
log_error(_failed_to_add_profile_msg, source_name, name);
return 0;
}
remove_config_tree_by_source(cmd, CONFIG_PROFILE_METADATA);
if (!override_config_tree_from_profile(cmd, profile)) {
log_error(_failed_to_apply_profile_msg, source_name, name);
return 0;
}
log_debug(_setting_global_profile_msg, _metadata_profile_source_name, profile->name);
cmd->profile_params->global_metadata_profile = profile;
}
if (!process_profilable_config(cmd))
return_0;
return 1;
}
static int _init_lvmlockd(struct cmd_context *cmd)
{
const char *lvmlockd_socket;
int use_lvmlockd = find_config_tree_bool(cmd, global_use_lvmlockd_CFG, NULL);
if (cmd->command->command_enum == pvscan_cache_CMD) {
/* pvscan cache ignores shared vgs, it only activates local vgs. */
if (use_lvmlockd)
log_debug("Ignore lvmlockd for pvscan cache.");
return 1;
}
/*
* Think about when/how to enable hints with lvmlockd.
*/
if (use_lvmlockd)
cmd->enable_hints = 0;
if (use_lvmlockd && arg_is_set(cmd, nolocking_ARG)) {
/* --nolocking is only allowed with vgs/lvs/pvs commands */
cmd->lockd_gl_disable = 1;
cmd->lockd_vg_disable = 1;
cmd->lockd_lv_disable = 1;
return 1;
}
if (use_lvmlockd && arg_is_set(cmd, lockopt_ARG)) {
const char *opts = arg_str_value(cmd, lockopt_ARG, "");
if (strstr(opts, "skiplv")) {
log_warn("WARNING: skipping LV lock in lvmlockd.");
cmd->lockd_lv_disable = 1;
}
if (strstr(opts, "skipvg")) {
log_warn("WARNING: skipping VG lock in lvmlockd.");
cmd->lockd_vg_disable = 1;
}
if (strstr(opts, "skipgl")) {
log_warn("WARNING: skipping global lock in lvmlockd.");
cmd->lockd_gl_disable = 1;
}
}
lvmlockd_disconnect(); /* start over when tool context is refreshed */
lvmlockd_socket = getenv("LVM_LVMLOCKD_SOCKET");
if (!lvmlockd_socket)
lvmlockd_socket = DEFAULT_RUN_DIR "/lvmlockd.socket";
lvmlockd_set_socket(lvmlockd_socket);
lvmlockd_set_use(use_lvmlockd);
if (use_lvmlockd) {
lvmlockd_init(cmd);
lvmlockd_connect();
}
return 1;
}
/*
* md_component_check full: always set use_full_md_check
* which causes filter-md to read the start+end of every
* device on the system (this could be optimized to only
* read the end of PVs.)
*
* md_component_check start: the end of devices will
* not generally be read to check for an md superblock
* (lvm may still scan for end-of-device md superblocks
* if it knows that some exists.)
*
* md_component_check auto: lvm will use some built-in
* heuristics to decide when it should scan the end of
* devices to look for md superblocks, e.g. commands
* like pvcreate that could clobber a component, or if
* udev info is not available and hints are not available.
*/
static void _init_md_checks(struct cmd_context *cmd)
{
const char *md_check;
cmd->md_component_detection = find_config_tree_bool(cmd, devices_md_component_detection_CFG, NULL);
md_check = find_config_tree_str(cmd, devices_md_component_checks_CFG, NULL);
if (!md_check)
cmd->md_component_checks = "auto";
else if (!strcmp(md_check, "auto") ||
!strcmp(md_check, "start") ||
!strcmp(md_check, "full"))
cmd->md_component_checks = md_check;
else {
log_warn("Ignoring unknown md_component_checks setting, using auto.");
cmd->md_component_checks = "auto";
}
if (!strcmp(cmd->md_component_checks, "full"))
cmd->use_full_md_check = 1;
/* use_full_md_check can also be set later */
log_debug("Using md_component_checks %s use_full_md_check %d",
cmd->md_component_checks, cmd->use_full_md_check);
}
static int _cmd_no_meta_proc(struct cmd_context *cmd)
{
return cmd->cname->flags & NO_METADATA_PROCESSING;
}
int lvm_run_command(struct cmd_context *cmd, int argc, char **argv)
{
struct dm_config_tree *config_string_cft, *config_profile_command_cft, *config_profile_metadata_cft;
int ret = 0;
int locking_type;
int readonly = 0;
int sysinit = 0;
int monitoring;
char *arg_new, *arg;
int i;
int skip_hyphens;
int refresh_done = 0;
/* Avoid excessive access to /etc/localtime and set TZ variable for glibc
* so it does not need to check /etc/localtime everytime that needs that info */
if (!getenv("TZ"))
setenv("TZ", ":/etc/localtime", 0);
init_error_message_produced(0);
/* each command should start out with sigint flag cleared */
sigint_clear();
if (!(cmd->name = dm_pool_strdup(cmd->mem, dm_basename(argv[0])))) {
log_error("Failed to strdup command basename.");
return ECMD_FAILED;
}
set_cmd_name(cmd->name);
init_log_command(find_config_tree_bool(cmd, log_command_names_CFG, NULL), 0);
configure_command_option_values(cmd->name);
/* eliminate '-' from all options starting with -- */
for (i = 1; i < argc; i++) {
arg = argv[i];
if (*arg++ != '-' || *arg++ != '-')
continue;
/* If we reach "--" then stop. */
if (!*arg)
break;
arg_new = arg;
skip_hyphens = 1;
while (*arg) {
/* If we encounter '=', stop any further hyphen removal. */
if (*arg == '=')
skip_hyphens = 0;
/* Do we need to keep the next character? */
if (*arg != '-' || !skip_hyphens) {
if (arg_new != arg)
*arg_new = *arg;
++arg_new;
}
arg++;
}
/* Terminate a shortened arg */
if (arg_new != arg)
*arg_new = '\0';
}
/* The cmd_line string is only used for logging, not processing. */
if (!(cmd->cmd_line = _copy_command_line(cmd, argc, argv)))
return_ECMD_FAILED;
/* Look up command - will be NULL if not recognised */
if (!(cmd->cname = find_command_name(cmd->name)))
return ENO_SUCH_CMD;
if (!_process_command_line(cmd, &argc, &argv)) {
log_error("Error during parsing of command line.");
return EINVALID_CMD_LINE;
}
/*
* Now we have the command line args, set up any known output logging
* options immediately.
*/
_reset_current_settings_to_default(cmd);
_get_current_output_settings_from_args(cmd);
_apply_current_output_settings(cmd);
log_debug("Version: %s", LVM_VERSION);
log_debug("Parsing: %s", cmd->cmd_line);
if (!(cmd->command = _find_command(cmd, cmd->name, &argc, argv)))
return EINVALID_CMD_LINE;
/*
* Remaining position args after command name and --options are removed.
*/
cmd->position_argc = argc;
cmd->position_argv = argv;
if (arg_is_set(cmd, config_ARG))
if (!override_config_tree_from_string(cmd, arg_str_value(cmd, config_ARG, ""))) {
ret = EINVALID_CMD_LINE;
goto_out;
}
if (arg_is_set(cmd, config_ARG) || !cmd->initialized.config || config_files_changed(cmd)) {
/* Reinitialise various settings inc. logging, filters */
if (!refresh_toolcontext(cmd)) {
if ((config_string_cft = remove_config_tree_by_source(cmd, CONFIG_STRING)))
dm_config_destroy(config_string_cft);
log_error("Updated config file invalid. Aborting.");
return ECMD_FAILED;
}
refresh_done = 1;
}
if (!_prepare_profiles(cmd))
return_ECMD_FAILED;
if (!cmd->initialized.connections && !_cmd_no_meta_proc(cmd) && !init_connections(cmd))
return_ECMD_FAILED;
if (!cmd->initialized.filters && !_cmd_no_meta_proc(cmd) &&
!init_filters(cmd, !refresh_done))
return_ECMD_FAILED;
cmd->metadata_read_only = arg_is_set(cmd, readonly_ARG);
cmd->is_activating = (cmd->command->command_enum == vgchange_activate_CMD) ||
(cmd->command->command_enum == lvchange_activate_CMD);
cmd->wipe_outdated_pvs = 0;
/*
* Now that all configs, profiles and command lines args are available,
* freshly calculate and apply all settings. Specific command line
* options take precedence over config files (which include --config as
* that is treated like a config file).
*/
_reset_current_settings_to_default(cmd);
if ((ret = _get_current_settings(cmd)))
goto_out;
_apply_current_settings(cmd);
if (cmd->degraded_activation)
log_debug("DEGRADED MODE. Incomplete RAID LVs will be processed.");
if (!get_activation_monitoring_mode(cmd, &monitoring))
goto_out;
init_dmeventd_monitor(monitoring);
log_debug("Processing command: %s", cmd->cmd_line);
log_debug("Command pid: %d", getpid());
log_debug("System ID: %s", cmd->system_id ? : "");
#ifdef O_DIRECT_SUPPORT
log_debug("O_DIRECT will be used");
#endif
if ((ret = _process_common_commands(cmd))) {
if (ret != ECMD_PROCESSED)
stack;
goto out;
}
if (cmd->metadata_read_only &&
!(cmd->cname->flags & PERMITTED_READ_ONLY)) {
log_error("%s: Command not permitted while global/metadata_read_only "
"is set.", cmd->cmd_line);
goto out;
}
cmd->ignorelockingfailure = arg_is_set(cmd, ignorelockingfailure_ARG);
cmd->nolocking = arg_is_set(cmd, nolocking_ARG);
if (_cmd_no_meta_proc(cmd))
cmd->nolocking = 1;
/* Defaults to 1 if not set. */
locking_type = find_config_tree_int(cmd, global_locking_type_CFG, NULL);
if (locking_type == 3)
log_warn("WARNING: see lvmlockd(8) for information on using cluster/clvm VGs.");
if ((locking_type == 0) || (locking_type == 5)) {
log_warn("WARNING: locking_type (%d) is deprecated, using --nolocking.", locking_type);
cmd->nolocking = 1;
} else if (locking_type == 4) {
log_warn("WARNING: locking_type (%d) is deprecated, using --sysinit --readonly.", locking_type);
sysinit = 1;
readonly = 1;
} else if (locking_type != 1) {
log_warn("WARNING: locking_type (%d) is deprecated, using file locking.", locking_type);
}
if ((cmd->sysinit = arg_is_set(cmd, sysinit_ARG)))
sysinit = 1;
if (arg_is_set(cmd, readonly_ARG))
readonly = 1;
if (cmd->nolocking) {
if (!_cmd_no_meta_proc(cmd))
log_warn("WARNING: File locking is disabled.");
} else {
if (!init_locking(cmd, sysinit, readonly, cmd->ignorelockingfailure)) {
ret = ECMD_FAILED;
goto_out;
}
}
_init_md_checks(cmd);
if (!dev_mpath_init(find_config_tree_str_allow_empty(cmd, devices_multipath_wwids_file_CFG, NULL))) {
ret = ECMD_FAILED;
goto_out;
}
if (!_cmd_no_meta_proc(cmd) && !_init_lvmlockd(cmd)) {
ret = ECMD_FAILED;
goto_out;
}
if (cmd->command->functions)
/* A command-line-specific function is used */
ret = cmd->command->functions->fn(cmd, argc, argv);
else
/* The old style command-name function is used */
ret = cmd->command->fn(cmd, argc, argv);
lvmlockd_disconnect();
fin_locking(cmd);
if (!_cmd_no_meta_proc(cmd) && find_config_tree_bool(cmd, global_notify_dbus_CFG, NULL))
lvmnotify_send(cmd);
out:
dev_mpath_exit();
hints_exit(cmd);
lvmcache_destroy(cmd, 1, 1);
label_scan_destroy(cmd);
if ((config_string_cft = remove_config_tree_by_source(cmd, CONFIG_STRING)))
dm_config_destroy(config_string_cft);
config_profile_command_cft = remove_config_tree_by_source(cmd, CONFIG_PROFILE_COMMAND);
config_profile_metadata_cft = remove_config_tree_by_source(cmd, CONFIG_PROFILE_METADATA);
cmd->profile_params->global_metadata_profile = NULL;
if (config_string_cft) {
/* Move this? */
if (!refresh_toolcontext(cmd))
stack;
} else if (config_profile_command_cft || config_profile_metadata_cft) {
if (!process_profilable_config(cmd))
stack;
}
if (ret == EINVALID_CMD_LINE && !cmd->is_interactive)
_short_usage(cmd->command->name);
log_debug("Completed: %s", cmd->cmd_line);
/*
* Reset all settings back to the persistent defaults that
* ignore everything supplied on the command line of the
* completed command.
*/
_reset_current_settings_to_default(cmd);
_apply_current_settings(cmd);
/*
* free off any memory the command used.
*/
dm_list_init(&cmd->arg_value_groups);
dm_pool_empty(cmd->mem);
reset_lvm_errno(1);
reset_log_duplicated();
return ret;
}
int lvm_return_code(int ret)
{
unlink_log_file(ret);
return (ret == ECMD_PROCESSED ? 0 : ret);
}
int lvm_split(char *str, int *argc, char **argv, int max)
{
char *b = str, *e;
char quote = 0;
*argc = 0;
while (*b) {
while (*b && isspace(*b))
b++;
if ((!*b) || (*b == '#'))
break;
if (*b == '\'' || *b == '"') {
quote = *b;
b++;
}
e = b;
while (*e && (quote ? *e != quote : !isspace(*e)))
e++;
argv[(*argc)++] = b;
if (!*e)
break;
*e++ = '\0';
quote = 0;
b = e;
if (*argc == max)
break;
}
if (*argc < max)
argv[*argc] = NULL;
return *argc;
}
/* Make sure we have always valid filedescriptors 0,1,2 */
static int _check_standard_fds(void)
{
int err = is_valid_fd(STDERR_FILENO);
if (!is_valid_fd(STDIN_FILENO) &&
!(stdin = fopen(_PATH_DEVNULL, "r"))) {
if (err)
perror("stdin stream open");
else
printf("stdin stream open: %s\n",
strerror(errno));
return 0;
}
if (!is_valid_fd(STDOUT_FILENO) &&
!(stdout = fopen(_PATH_DEVNULL, "w"))) {
if (err)
perror("stdout stream open");
/* else no stdout */
return 0;
}
if (!is_valid_fd(STDERR_FILENO) &&
!(stderr = fopen(_PATH_DEVNULL, "w"))) {
printf("stderr stream open: %s\n",
strerror(errno));
return 0;
}
return 1;
}
#define LVM_OUT_FD_ENV_VAR_NAME "LVM_OUT_FD"
#define LVM_ERR_FD_ENV_VAR_NAME "LVM_ERR_FD"
#define LVM_REPORT_FD_ENV_VAR_NAME "LVM_REPORT_FD"
static int _do_get_custom_fd(const char *env_var_name, int *fd)
{
const char *str;
char *endptr;
long int tmp_fd;
*fd = -1;
if (!(str = getenv(env_var_name)))
return 1;
errno = 0;
tmp_fd = strtol(str, &endptr, 10);
if (errno || *endptr || (tmp_fd < 0) || (tmp_fd > INT_MAX)) {
log_error("%s: invalid file descriptor.", env_var_name);
return 0;
}
*fd = tmp_fd;
return 1;
}
static int _get_custom_fds(struct custom_fds *custom_fds)
{
return _do_get_custom_fd(LVM_OUT_FD_ENV_VAR_NAME, &custom_fds->out) &&
_do_get_custom_fd(LVM_ERR_FD_ENV_VAR_NAME, &custom_fds->err) &&
_do_get_custom_fd(LVM_REPORT_FD_ENV_VAR_NAME, &custom_fds->report);
}
static const char *_get_cmdline(pid_t pid)
{
static char _proc_cmdline[32];
char buf[256];
int fd, n = 0;
snprintf(buf, sizeof(buf), DEFAULT_PROC_DIR "/%u/cmdline", pid);
/* FIXME Use generic read code. */
if ((fd = open(buf, O_RDONLY)) >= 0) {
if ((n = read(fd, _proc_cmdline, sizeof(_proc_cmdline) - 1)) < 0) {
log_sys_error("read", buf);
n = 0;
}
if (close(fd))
log_sys_error("close", buf);
}
_proc_cmdline[n] = '\0';
return _proc_cmdline;
}
static const char *_get_filename(int fd)
{
static char filename[PATH_MAX];
char buf[32]; /* Assumes short DEFAULT_PROC_DIR */
int size;
snprintf(buf, sizeof(buf), DEFAULT_PROC_DIR "/self/fd/%u", fd);
if ((size = readlink(buf, filename, sizeof(filename) - 1)) == -1)
filename[0] = '\0';
else
filename[size] = '\0';
return filename;
}
static void _close_descriptor(int fd, unsigned suppress_warnings,
const char *command, pid_t ppid,
const char *parent_cmdline)
{
int r;
const char *filename;
/* Ignore bad file descriptors */
if (!is_valid_fd(fd))
return;
if (!suppress_warnings)
filename = _get_filename(fd);
r = close(fd);
if (suppress_warnings)
return;
if (!r)
fprintf(stderr, "File descriptor %d (%s) leaked on "
"%s invocation.", fd, filename, command);
else if (errno == EBADF)
return;
else
fprintf(stderr, "Close failed on stray file descriptor "
"%d (%s): %s", fd, filename, strerror(errno));
fprintf(stderr, " Parent PID %" PRIpid_t ": %s\n", ppid, parent_cmdline);
}
static int _close_stray_fds(const char *command, struct custom_fds *custom_fds)
{
#ifndef VALGRIND_POOL
struct rlimit rlim;
int fd;
unsigned suppress_warnings = 0;
pid_t ppid = getppid();
const char *parent_cmdline = _get_cmdline(ppid);
static const char _fd_dir[] = DEFAULT_PROC_DIR "/self/fd";
struct dirent *dirent;
DIR *d;
#ifdef HAVE_VALGRIND
if (RUNNING_ON_VALGRIND) {
log_debug("Skipping close of descriptors within valgrind execution.");
return 1;
}
#endif
if (getenv("LVM_SUPPRESS_FD_WARNINGS"))
suppress_warnings = 1;
if (!(d = opendir(_fd_dir))) {
if (errno != ENOENT) {
log_sys_error("opendir", _fd_dir);
return 0; /* broken system */
}
/* Path does not exist, use the old way */
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
log_sys_error("getrlimit", "RLIMIT_NOFILE");
return 1;
}
for (fd = 3; fd < (int)rlim.rlim_cur; fd++) {
if ((fd != custom_fds->out) &&
(fd != custom_fds->err) &&
(fd != custom_fds->report)) {
_close_descriptor(fd, suppress_warnings, command, ppid,
parent_cmdline);
}
}
return 1;
}
while ((dirent = readdir(d))) {
fd = atoi(dirent->d_name);
if ((fd > 2) &&
(fd != dirfd(d)) &&
(fd != custom_fds->out) &&
(fd != custom_fds->err) &&
(fd != custom_fds->report)) {
_close_descriptor(fd, suppress_warnings,
command, ppid, parent_cmdline);
}
}
if (closedir(d))
log_sys_debug("closedir", _fd_dir);
#endif
return 1;
}
struct cmd_context *init_lvm(unsigned set_connections,
unsigned set_filters,
unsigned threaded)
{
struct cmd_context *cmd;
/*
* It's not necessary to use name mangling for LVM:
* - the character set used for LV names is subset of udev character set
* - when we check other devices (e.g. device_is_usable fn), we use major:minor, not dm names
*/
dm_set_name_mangling_mode(DM_STRING_MANGLING_NONE);
if (!(cmd = create_toolcontext(0, NULL, 1, threaded, set_connections, set_filters))) {
return_NULL;
}
_cmdline.opt_names = &opt_names[0];
if (stored_errno()) {
destroy_toolcontext(cmd);
return_NULL;
}
return cmd;
}
void lvm_fin(struct cmd_context *cmd)
{
_unregister_commands();
destroy_toolcontext(cmd);
udev_fin_library_context();
}
static int _run_script(struct cmd_context *cmd, int argc, char **argv)
{
FILE *script;
char buffer[CMD_LEN];
int ret = ENO_SUCH_CMD;
int magic_number = 0;
char *script_file = argv[0];
int largc;
char *largv[MAX_ARGS];
if ((script = fopen(script_file, "r")) == NULL)
return ENO_SUCH_CMD;
while (fgets(buffer, sizeof(buffer), script) != NULL) {
if (!magic_number) {
if (buffer[0] == '#' && buffer[1] == '!')
magic_number = 1;
else {
ret = ENO_SUCH_CMD;
break;
}
}
if ((strlen(buffer) == sizeof(buffer) - 1)
&& (buffer[sizeof(buffer) - 1] - 2 != '\n')) {
buffer[50] = '\0';
log_error("Line too long (max 255) beginning: %s",
buffer);
ret = EINVALID_CMD_LINE;
break;
}
if (lvm_split(buffer, &largc, largv, MAX_ARGS) == MAX_ARGS) {
buffer[50] = '\0';
log_error("Too many arguments: %s", buffer);
ret = EINVALID_CMD_LINE;
break;
}
if (!largc)
continue;
if (!strcmp(largv[0], "quit") || !strcmp(largv[0], "exit"))
break;
ret = lvm_run_command(cmd, largc, largv);
/*
* FIXME: handling scripts with invalid or failing commands
* could use some cleaning up, e.g. error_message_produced
* check and error are repeated again in the caller.
*/
if (ret == ENO_SUCH_CMD)
break;
if (ret != ECMD_PROCESSED) {
if (!error_message_produced()) {
log_debug(INTERNAL_ERROR "Failed command did not use log_error");
log_error("Command failed with status code %d.", ret);
}
break;
}
}
if (fclose(script))
log_sys_error("fclose", script_file);
return ret;
}
static void _nonroot_warning(void)
{
if (getuid() || geteuid())
log_warn("WARNING: Running as a non-root user. Functionality may be unavailable.");
}
int lvm2_main(int argc, char **argv)
{
const char *base;
int ret, alias = 0;
struct custom_fds custom_fds;
struct cmd_context *cmd;
int run_shell = 0;
int run_script = 0;
const char *run_name;
const char *run_command_name = NULL;
if (!argv)
return EINIT_FAILED;
base = last_path_component(argv[0]);
if (strcmp(base, "lvm") && strcmp(base, "lvm.static") &&
strcmp(base, "initrd-lvm"))
alias = 1;
if (!_check_standard_fds())
return EINIT_FAILED;
if (!_get_custom_fds(&custom_fds))
return EINIT_FAILED;
if (!_close_stray_fds(base, &custom_fds))
return EINIT_FAILED;
if (!init_custom_log_streams(&custom_fds))
return EINIT_FAILED;
if (is_static() && strcmp(base, "lvm.static") &&
path_exists(LVM_PATH) &&
!getenv("LVM_DID_EXEC")) {
if (setenv("LVM_DID_EXEC", base, 1))
log_sys_error("setenv", "LVM_DID_EXEC");
if (execvp(LVM_PATH, argv) == -1)
log_sys_error("execvp", LVM_PATH);
if (unsetenv("LVM_DID_EXEC"))
log_sys_error("unsetenv", "LVM_DID_EXEC");
}
if (!alias && argc > 1) {
/* "version" command is simple enough so it doesn't need any complex init */
if (!strcmp(argv[1], "version"))
return lvm_return_code(version(NULL, argc, argv));
/* turn 'lvm -h', 'lvm --help', 'lvm -?' into 'lvm help' */
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help") || !strcmp(argv[1], "-?"))
argv[1] = (char *)"help";
if (*argv[1] == '-') {
log_error("Specify options after a command: lvm [command] [options].");
return EINVALID_CMD_LINE;
}
}
/* turn command -? into command -h and lvm command -? into lvm command -h */
if (alias && (argc > 1) && !strcmp(argv[1], "-?"))
argv[1] = (char *)"-h";
if (!alias && (argc > 2) && !strcmp(argv[2], "-?"))
argv[2] = (char *)"-h";
if (!(cmd = init_lvm(0, 0, 0)))
return EINIT_FAILED;
/* Store original argv location so we may customise it if we become a daemon */
cmd->argv = argv;
/*
* If the invocation command name wasn't itself an alias, shift to the
* first arg. After this point, run_name holds one of:
* the LVM command name we want to run;
* the LVM script name (handled through ENO_SUCH_CMD below);
* NULL for a shell (if readline is enabled).
*/
if (!alias) {
argc--;
argv++;
run_name = argv[0];
} else
run_name = dm_basename(argv[0]);
/*
* Decide if we are running a shell or a command or a script. When
* there is no run_name, it's a shell, when run_name is a recognized
* lvm command it's that command, when run_name is not a recognized
* command name, try it as an lvm script.
*/
if (!run_name)
run_shell = 1;
else if (!find_command_name(run_name))
run_script = 1;
else
run_command_name = run_name;
/*
* NULL run_command_name means register all command defs because
* a script or shell needs to access any command name, while a
* single command needs to access only defs for the named command.
*/
if (!lvm_register_commands(cmd, run_command_name)) {
ret = ECMD_FAILED;
goto out;
}
if (run_shell) {
#if defined(READLINE_SUPPORT) || defined(EDITLINE_SUPPORT)
_nonroot_warning();
if (!_prepare_profiles(cmd)) {
ret = ECMD_FAILED;
goto out;
}
ret = lvm_shell(cmd, &_cmdline);
goto out;
#else
log_fatal("Please supply an LVM command.");
_display_help();
ret = EINVALID_CMD_LINE;
goto out;
#endif
}
_nonroot_warning();
if (run_script)
ret = _run_script(cmd, argc, argv);
else
ret = lvm_run_command(cmd, argc, argv);
if (ret == ENO_SUCH_CMD) {
log_error("No such command. Try 'lvm help'.");
goto out;
}
if ((ret != ECMD_PROCESSED) && !error_message_produced()) {
log_debug(INTERNAL_ERROR "Failed command did not use log_error");
log_error("Command failed with status code %d.", ret);
}
out:
lvm_fin(cmd);
return lvm_return_code(ret);
}
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