/* $NetBSD: lvchange.c,v 1.1.1.3 2009/12/02 00:25:49 haad Exp $ */
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tools.h"
static int lvchange_permission(struct cmd_context *cmd,
struct logical_volume *lv)
{
uint32_t lv_access;
struct lvinfo info;
int r = 0;
lv_access = arg_uint_value(cmd, permission_ARG, 0);
if ((lv_access & LVM_WRITE) && (lv->status & LVM_WRITE)) {
log_error("Logical volume \"%s\" is already writable",
lv->name);
return 0;
}
if (!(lv_access & LVM_WRITE) && !(lv->status & LVM_WRITE)) {
log_error("Logical volume \"%s\" is already read only",
lv->name);
return 0;
}
if ((lv->status & MIRRORED) && (vg_is_clustered(lv->vg)) &&
lv_info(cmd, lv, &info, 0, 0) && info.exists) {
log_error("Cannot change permissions of mirror \"%s\" "
"while active.", lv->name);
return 0;
}
if (lv_access & LVM_WRITE) {
lv->status |= LVM_WRITE;
log_verbose("Setting logical volume \"%s\" read/write",
lv->name);
} else {
lv->status &= ~LVM_WRITE;
log_verbose("Setting logical volume \"%s\" read-only",
lv->name);
}
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
if (!vg_write(lv->vg))
return_0;
if (!suspend_lv(cmd, lv)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
goto out;
}
if (!vg_commit(lv->vg)) {
resume_lv(cmd, lv);
goto_out;
}
log_very_verbose("Updating permissions for \"%s\" in kernel", lv->name);
if (!resume_lv(cmd, lv)) {
log_error("Problem reactivating %s", lv->name);
goto out;
}
r = 1;
out:
backup(lv->vg);
return r;
}
static int lvchange_monitoring(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct lvinfo info;
if (!lv_info(cmd, lv, &info, 0, 0) || !info.exists) {
log_error("Logical volume, %s, is not active", lv->name);
return 0;
}
/* do not monitor pvmove lv's */
if (lv->status & PVMOVE)
return 1;
if ((dmeventd_monitor_mode() != DMEVENTD_MONITOR_IGNORE) &&
!monitor_dev_for_events(cmd, lv, dmeventd_monitor_mode()))
stack;
return 1;
}
static int lvchange_availability(struct cmd_context *cmd,
struct logical_volume *lv)
{
int activate;
activate = arg_uint_value(cmd, available_ARG, 0);
if (activate == CHANGE_ALN) {
log_verbose("Deactivating logical volume \"%s\" locally",
lv->name);
if (!deactivate_lv_local(cmd, lv))
return_0;
} else if (activate == CHANGE_AN) {
log_verbose("Deactivating logical volume \"%s\"", lv->name);
if (!deactivate_lv(cmd, lv))
return_0;
} else {
if (lv_is_origin(lv) || (activate == CHANGE_AE)) {
log_verbose("Activating logical volume \"%s\" "
"exclusively", lv->name);
if (!activate_lv_excl(cmd, lv))
return_0;
} else if (activate == CHANGE_ALY) {
log_verbose("Activating logical volume \"%s\" locally",
lv->name);
if (!activate_lv_local(cmd, lv))
return_0;
} else {
log_verbose("Activating logical volume \"%s\"",
lv->name);
if (!activate_lv(cmd, lv))
return_0;
}
lv_spawn_background_polling(cmd, lv);
}
return 1;
}
static int lvchange_refresh(struct cmd_context *cmd, struct logical_volume *lv)
{
log_verbose("Refreshing logical volume \"%s\" (if active)", lv->name);
return lv_refresh(cmd, lv);
}
static int lvchange_resync(struct cmd_context *cmd,
struct logical_volume *lv)
{
int active = 0;
int monitored;
struct lvinfo info;
struct logical_volume *log_lv;
if (!(lv->status & MIRRORED)) {
log_error("Unable to resync %s because it is not mirrored.",
lv->name);
return 1;
}
if (lv->status & PVMOVE) {
log_error("Unable to resync pvmove volume %s", lv->name);
return 0;
}
if (lv->status & LOCKED) {
log_error("Unable to resync locked volume %s", lv->name);
return 0;
}
if (lv_info(cmd, lv, &info, 1, 0)) {
if (info.open_count) {
log_error("Can't resync open logical volume \"%s\"",
lv->name);
return 0;
}
if (info.exists) {
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Do you really want to deactivate "
"logical volume %s to resync it? [y/n]: ",
lv->name) == 'n') {
log_print("Logical volume \"%s\" not resynced",
lv->name);
return 0;
}
if (sigint_caught())
return 0;
active = 1;
}
}
/* Activate exclusively to ensure no nodes still have LV active */
monitored = dmeventd_monitor_mode();
init_dmeventd_monitor(0);
if (!deactivate_lv(cmd, lv)) {
log_error("Unable to deactivate %s for resync", lv->name);
return 0;
}
if (vg_is_clustered(lv->vg) && lv_is_active(lv)) {
log_error("Can't get exclusive access to clustered volume %s",
lv->name);
return 0;
}
init_dmeventd_monitor(monitored);
log_lv = first_seg(lv)->log_lv;
log_very_verbose("Starting resync of %s%s%s mirror \"%s\"",
(active) ? "active " : "",
vg_is_clustered(lv->vg) ? "clustered " : "",
(log_lv) ? "disk-logged" : "core-logged",
lv->name);
/*
* If this mirror has a core log (i.e. !log_lv),
* then simply deactivating/activating will cause
* it to reset the sync status. We only need to
* worry about persistent logs.
*/
if (!log_lv && !(lv->status & MIRROR_NOTSYNCED)) {
if (active && !activate_lv(cmd, lv)) {
log_error("Failed to reactivate %s to resynchronize "
"mirror", lv->name);
return 0;
}
return 1;
}
lv->status &= ~MIRROR_NOTSYNCED;
if (log_lv) {
/* Separate mirror log so we can clear it */
detach_mirror_log(first_seg(lv));
if (!vg_write(lv->vg)) {
log_error("Failed to write intermediate VG metadata.");
if (!attach_mirror_log(first_seg(lv), log_lv))
stack;
if (active && !activate_lv(cmd, lv))
stack;
return 0;
}
if (!vg_commit(lv->vg)) {
log_error("Failed to commit intermediate VG metadata.");
if (!attach_mirror_log(first_seg(lv), log_lv))
stack;
if (active && !activate_lv(cmd, lv))
stack;
return 0;
}
backup(lv->vg);
if (!activate_lv(cmd, log_lv)) {
log_error("Unable to activate %s for mirror log resync",
log_lv->name);
return 0;
}
log_very_verbose("Clearing log device %s", log_lv->name);
if (!set_lv(cmd, log_lv, log_lv->size, 0)) {
log_error("Unable to reset sync status for %s", lv->name);
if (!deactivate_lv(cmd, log_lv))
log_error("Failed to deactivate log LV after "
"wiping failed");
return 0;
}
if (!deactivate_lv(cmd, log_lv)) {
log_error("Unable to deactivate log LV %s after wiping "
"for resync", log_lv->name);
return 0;
}
/* Put mirror log back in place */
if (!attach_mirror_log(first_seg(lv), log_lv))
stack;
}
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
if (!vg_write(lv->vg) || !vg_commit(lv->vg)) {
log_error("Failed to update metadata on disk.");
return 0;
}
if (active && !activate_lv(cmd, lv)) {
log_error("Failed to reactivate %s after resync", lv->name);
return 0;
}
return 1;
}
static int lvchange_alloc(struct cmd_context *cmd, struct logical_volume *lv)
{
int want_contiguous = 0;
alloc_policy_t alloc;
want_contiguous = strcmp(arg_str_value(cmd, contiguous_ARG, "n"), "n");
alloc = want_contiguous ? ALLOC_CONTIGUOUS : ALLOC_INHERIT;
alloc = arg_uint_value(cmd, alloc_ARG, alloc);
if (alloc == lv->alloc) {
log_error("Allocation policy of logical volume \"%s\" is "
"already %s", lv->name, get_alloc_string(alloc));
return 0;
}
lv->alloc = alloc;
/* FIXME If contiguous, check existing extents already are */
log_verbose("Setting contiguous allocation policy for \"%s\" to %s",
lv->name, get_alloc_string(alloc));
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
/* No need to suspend LV for this change */
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
backup(lv->vg);
return 1;
}
static int lvchange_readahead(struct cmd_context *cmd,
struct logical_volume *lv)
{
unsigned read_ahead = 0;
unsigned pagesize = (unsigned) lvm_getpagesize() >> SECTOR_SHIFT;
int r = 0;
read_ahead = arg_uint_value(cmd, readahead_ARG, 0);
if (read_ahead != DM_READ_AHEAD_AUTO &&
(lv->vg->fid->fmt->features & FMT_RESTRICTED_READAHEAD) &&
(read_ahead < 2 || read_ahead > 120)) {
log_error("Metadata only supports readahead values between 2 and 120.");
return 0;
}
if (read_ahead != DM_READ_AHEAD_AUTO &&
read_ahead != DM_READ_AHEAD_NONE && read_ahead % pagesize) {
if (read_ahead < pagesize)
read_ahead = pagesize;
else
read_ahead = (read_ahead / pagesize) * pagesize;
log_warn("WARNING: Overriding readahead to %u sectors, a multiple "
"of %uK page size.", read_ahead, pagesize >> 1);
}
if (lv->read_ahead == read_ahead) {
if (read_ahead == DM_READ_AHEAD_AUTO)
log_error("Read ahead is already auto for \"%s\"", lv->name);
else
log_error("Read ahead is already %u for \"%s\"",
read_ahead, lv->name);
return 0;
}
lv->read_ahead = read_ahead;
log_verbose("Setting read ahead to %u for \"%s\"", read_ahead,
lv->name);
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
if (!vg_write(lv->vg))
return_0;
if (!suspend_lv(cmd, lv)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
goto out;
}
if (!vg_commit(lv->vg)) {
resume_lv(cmd, lv);
goto_out;
}
log_very_verbose("Updating permissions for \"%s\" in kernel", lv->name);
if (!resume_lv(cmd, lv)) {
log_error("Problem reactivating %s", lv->name);
goto out;
}
r = 1;
out:
backup(lv->vg);
return r;
}
static int lvchange_persistent(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct lvinfo info;
int active = 0;
if (!strcmp(arg_str_value(cmd, persistent_ARG, "n"), "n")) {
if (!(lv->status & FIXED_MINOR)) {
log_error("Minor number is already not persistent "
"for \"%s\"", lv->name);
return 0;
}
lv->status &= ~FIXED_MINOR;
lv->minor = -1;
lv->major = -1;
log_verbose("Disabling persistent device number for \"%s\"",
lv->name);
} else {
if (!arg_count(cmd, minor_ARG) && lv->minor < 0) {
log_error("Minor number must be specified with -My");
return 0;
}
if (!arg_count(cmd, major_ARG) && lv->major < 0) {
log_error("Major number must be specified with -My");
return 0;
}
if (lv_info(cmd, lv, &info, 0, 0) && info.exists)
active = 1;
if (active && !arg_count(cmd, force_ARG) &&
yes_no_prompt("Logical volume %s will be "
"deactivated temporarily. "
"Continue? [y/n]: ", lv->name) == 'n') {
log_print("%s device number not changed.",
lv->name);
return 0;
}
if (sigint_caught())
return 0;
log_verbose("Ensuring %s is inactive.", lv->name);
if (!deactivate_lv(cmd, lv)) {
log_error("%s: deactivation failed", lv->name);
return 0;
}
lv->status |= FIXED_MINOR;
lv->minor = arg_int_value(cmd, minor_ARG, lv->minor);
lv->major = arg_int_value(cmd, major_ARG, lv->major);
log_verbose("Setting persistent device number to (%d, %d) "
"for \"%s\"", lv->major, lv->minor, lv->name);
}
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
backup(lv->vg);
if (active) {
log_verbose("Re-activating logical volume \"%s\"", lv->name);
if (!activate_lv(cmd, lv)) {
log_error("%s: reactivation failed", lv->name);
return 0;
}
}
return 1;
}
static int lvchange_tag(struct cmd_context *cmd, struct logical_volume *lv,
int arg)
{
const char *tag;
if (!(tag = arg_str_value(cmd, arg, NULL))) {
log_error("Failed to get tag");
return 0;
}
if (!(lv->vg->fid->fmt->features & FMT_TAGS)) {
log_error("Logical volume %s/%s does not support tags",
lv->vg->name, lv->name);
return 0;
}
if ((arg == addtag_ARG)) {
if (!str_list_add(cmd->mem, &lv->tags, tag)) {
log_error("Failed to add tag %s to %s/%s",
tag, lv->vg->name, lv->name);
return 0;
}
} else {
if (!str_list_del(&lv->tags, tag)) {
log_error("Failed to remove tag %s from %s/%s",
tag, lv->vg->name, lv->name);
return 0;
}
}
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
/* No need to suspend LV for this change */
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
backup(lv->vg);
return 1;
}
static int lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle __attribute((unused)))
{
int doit = 0, docmds = 0;
int archived = 0;
struct logical_volume *origin;
if (!(lv->vg->status & LVM_WRITE) &&
(arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) ||
arg_count(cmd, readahead_ARG) || arg_count(cmd, persistent_ARG) ||
arg_count(cmd, alloc_ARG))) {
log_error("Only -a permitted with read-only volume "
"group \"%s\"", lv->vg->name);
return EINVALID_CMD_LINE;
}
if (lv_is_origin(lv) &&
(arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) ||
arg_count(cmd, readahead_ARG) || arg_count(cmd, persistent_ARG) ||
arg_count(cmd, alloc_ARG))) {
log_error("Can't change logical volume \"%s\" under snapshot",
lv->name);
return ECMD_FAILED;
}
if (lv_is_cow(lv) && !lv_is_virtual_origin(origin_from_cow(lv)) &&
arg_count(cmd, available_ARG)) {
log_error("Can't change snapshot logical volume \"%s\"",
lv->name);
return ECMD_FAILED;
}
if (lv->status & PVMOVE) {
log_error("Unable to change pvmove LV %s", lv->name);
if (arg_count(cmd, available_ARG))
log_error("Use 'pvmove --abort' to abandon a pvmove");
return ECMD_FAILED;
}
if (lv->status & MIRROR_LOG) {
log_error("Unable to change mirror log LV %s directly", lv->name);
return ECMD_FAILED;
}
if (lv->status & MIRROR_IMAGE) {
log_error("Unable to change mirror image LV %s directly",
lv->name);
return ECMD_FAILED;
}
/* If LV is sparse, activate origin instead */
if (arg_count(cmd, available_ARG) && lv_is_cow(lv) &&
lv_is_virtual_origin(origin = origin_from_cow(lv)))
lv = origin;
if (!(lv_is_visible(lv)) && !lv_is_virtual_origin(lv)) {
log_error("Unable to change internal LV %s directly",
lv->name);
return ECMD_FAILED;
}
init_dmeventd_monitor(arg_int_value(cmd, monitor_ARG,
(is_static() || arg_count(cmd, ignoremonitoring_ARG)) ?
DMEVENTD_MONITOR_IGNORE : DEFAULT_DMEVENTD_MONITOR));
/* access permission change */
if (arg_count(cmd, permission_ARG)) {
if (!archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_permission(cmd, lv);
docmds++;
}
/* allocation policy change */
if (arg_count(cmd, contiguous_ARG) || arg_count(cmd, alloc_ARG)) {
if (!archived && !archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_alloc(cmd, lv);
docmds++;
}
/* read ahead sector change */
if (arg_count(cmd, readahead_ARG)) {
if (!archived && !archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_readahead(cmd, lv);
docmds++;
}
/* persistent device number change */
if (arg_count(cmd, persistent_ARG)) {
if (!archived && !archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_persistent(cmd, lv);
docmds++;
if (sigint_caught()) {
stack;
return ECMD_FAILED;
}
}
/* add tag */
if (arg_count(cmd, addtag_ARG)) {
if (!archived && !archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_tag(cmd, lv, addtag_ARG);
docmds++;
}
/* del tag */
if (arg_count(cmd, deltag_ARG)) {
if (!archived && !archive(lv->vg)) {
stack;
return ECMD_FAILED;
}
archived = 1;
doit += lvchange_tag(cmd, lv, deltag_ARG);
docmds++;
}
if (doit)
log_print("Logical volume \"%s\" changed", lv->name);
if (arg_count(cmd, resync_ARG))
if (!lvchange_resync(cmd, lv)) {
stack;
return ECMD_FAILED;
}
/* availability change */
if (arg_count(cmd, available_ARG)) {
if (!lvchange_availability(cmd, lv)) {
stack;
return ECMD_FAILED;
}
}
if (arg_count(cmd, refresh_ARG))
if (!lvchange_refresh(cmd, lv)) {
stack;
return ECMD_FAILED;
}
if (!arg_count(cmd, available_ARG) &&
!arg_count(cmd, refresh_ARG) &&
arg_count(cmd, monitor_ARG)) {
if (!lvchange_monitoring(cmd, lv)) {
stack;
return ECMD_FAILED;
}
}
if (doit != docmds) {
stack;
return ECMD_FAILED;
}
return ECMD_PROCESSED;
}
int lvchange(struct cmd_context *cmd, int argc, char **argv)
{
if (!arg_count(cmd, available_ARG) && !arg_count(cmd, contiguous_ARG)
&& !arg_count(cmd, permission_ARG) && !arg_count(cmd, readahead_ARG)
&& !arg_count(cmd, minor_ARG) && !arg_count(cmd, major_ARG)
&& !arg_count(cmd, persistent_ARG) && !arg_count(cmd, addtag_ARG)
&& !arg_count(cmd, deltag_ARG) && !arg_count(cmd, refresh_ARG)
&& !arg_count(cmd, alloc_ARG) && !arg_count(cmd, monitor_ARG)
&& !arg_count(cmd, resync_ARG)) {
log_error("Need 1 or more of -a, -C, -j, -m, -M, -p, -r, "
"--resync, --refresh, --alloc, --addtag, --deltag "
"or --monitor");
return EINVALID_CMD_LINE;
}
int avail_only = /* i.e. only one of -a or --refresh is given */
!(arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) ||
arg_count(cmd, readahead_ARG) || arg_count(cmd, persistent_ARG) ||
arg_count(cmd, addtag_ARG) || arg_count(cmd, deltag_ARG) ||
arg_count(cmd, resync_ARG) || arg_count(cmd, alloc_ARG));
if (arg_count(cmd, ignorelockingfailure_ARG) && !avail_only) {
log_error("Only -a permitted with --ignorelockingfailure");
return EINVALID_CMD_LINE;
}
if (avail_only)
cmd->handles_missing_pvs = 1;
if (!argc) {
log_error("Please give logical volume path(s)");
return EINVALID_CMD_LINE;
}
if ((arg_count(cmd, minor_ARG) || arg_count(cmd, major_ARG)) &&
!arg_count(cmd, persistent_ARG)) {
log_error("--major and --minor require -My");
return EINVALID_CMD_LINE;
}
if (arg_count(cmd, minor_ARG) && argc != 1) {
log_error("Only give one logical volume when specifying minor");
return EINVALID_CMD_LINE;
}
if (arg_count(cmd, contiguous_ARG) && arg_count(cmd, alloc_ARG)) {
log_error("Only one of --alloc and --contiguous permitted");
return EINVALID_CMD_LINE;
}
return process_each_lv(cmd, argc, argv,
avail_only ? 0 : READ_FOR_UPDATE, NULL,
&lvchange_single);
}