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lvm2/tools/lvchange.c
Alasdair Kergon cfb7bfc7d9 More consistent error code usage.
2003-10-21 22:06:07 +00:00

419 lines
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C
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/*
* Copyright (C) 2001 Sistina Software
*
* LVM is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LVM is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LVM; see the file COPYING. If not, write to
* the Free Software Foundation, 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;
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_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)) {
stack;
return 0;
}
backup(lv->vg);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_SUSPEND | LCK_HOLD)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
return 0;
}
if (!vg_commit(lv->vg)) {
unlock_lv(cmd, lv->lvid.s);
return 0;
}
log_very_verbose("Updating permissions for \"%s\" in kernel", lv->name);
if (!unlock_lv(cmd, lv->lvid.s)) {
log_error("Problem reactivating %s", lv->name);
return 0;
}
return 1;
}
static int lvchange_availability(struct cmd_context *cmd,
struct logical_volume *lv)
{
int activate = 0;
struct physical_volume *pv;
if (strcmp(arg_str_value(cmd, available_ARG, "n"), "n"))
activate = 1;
if (activate) {
/* FIXME Tighter locking if lv_is_origin() */
log_verbose("Activating logical volume \"%s\"", lv->name);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_ACTIVATE))
return 0;
if ((lv->status & LOCKED) && (pv = get_pvmove_pv_from_lv(lv))) {
log_verbose("Spawning background pvmove process for %s",
dev_name(pv->dev));
pvmove_poll(cmd, dev_name(pv->dev), 1);
}
} else {
log_verbose("Deactivating logical volume \"%s\"", lv->name);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_DEACTIVATE))
return 0;
}
return 1;
}
static int lvchange_contiguous(struct cmd_context *cmd,
struct logical_volume *lv)
{
int want_contiguous = 0;
if (strcmp(arg_str_value(cmd, contiguous_ARG, "n"), "n"))
want_contiguous = 1;
if (want_contiguous && lv->alloc == ALLOC_CONTIGUOUS) {
log_error("Allocation policy of logical volume \"%s\" is "
"already contiguous", lv->name);
return 0;
}
if (!want_contiguous && lv->alloc != ALLOC_CONTIGUOUS) {
log_error
("Allocation policy of logical volume \"%s\" is already"
" not contiguous", lv->name);
return 0;
}
/******** FIXME lv_check_contiguous?
if (want_contiguous)
&& (ret = lv_check_contiguous(vg, lv_index + 1)) == FALSE) {
log_error("No contiguous logical volume \"%s\"", lv->name);
return 0;
*********/
if (want_contiguous) {
lv->alloc = ALLOC_CONTIGUOUS;
log_verbose("Setting contiguous allocation policy for \"%s\"",
lv->name);
} else {
lv->alloc = ALLOC_DEFAULT;
log_verbose("Reverting to default allocation policy for \"%s\"",
lv->name);
}
log_very_verbose("Updating logical volume \"%s\" on disk(s)", lv->name);
if (!vg_write(lv->vg)) {
stack;
return 0;
}
backup(lv->vg);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_SUSPEND | LCK_HOLD)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
return 0;
}
if (!vg_commit(lv->vg)) {
unlock_lv(cmd, lv->lvid.s);
return 0;
}
if (!unlock_lv(cmd, lv->lvid.s)) {
log_error("Problem reactivating %s", lv->name);
return 0;
}
return 1;
}
static int lvchange_readahead(struct cmd_context *cmd,
struct logical_volume *lv)
{
unsigned int read_ahead = 0;
read_ahead = arg_uint_value(cmd, readahead_ARG, 0);
/******* FIXME Ranges?
if (read_ahead < LVM_MIN_READ_AHEAD || read_ahead > LVM_MAX_READ_AHEAD) {
log_error("read ahead sector argument is invalid");
return 0;
}
********/
if (lv->read_ahead == read_ahead) {
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)) {
stack;
return 0;
}
backup(lv->vg);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_SUSPEND | LCK_HOLD)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
return 0;
}
if (!vg_commit(lv->vg)) {
unlock_lv(cmd, lv->lvid.s);
return 0;
}
log_very_verbose("Updating permissions for \"%s\" in kernel", lv->name);
if (!unlock_lv(cmd, lv->lvid.s)) {
log_error("Problem reactivating %s", lv->name);
return 0;
}
return 1;
}
static int lvchange_persistent(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct lvinfo info;
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(lv, &info) && info.exists &&
!arg_count(cmd, force_ARG)) {
if (yes_no_prompt("Logical volume %s will be "
"deactivated first. "
"Continue? [y/n]: ",
lv->name) == 'n') {
log_print("%s device number not changed.",
lv->name);
return 0;
}
}
log_print("Ensuring %s is inactive. "
"(Reactivate using lvchange -ay.)", lv->name);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_DEACTIVATE)) {
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)) {
stack;
return 0;
}
backup(lv->vg);
if (!lock_vol(cmd, lv->lvid.s, LCK_LV_SUSPEND | LCK_HOLD)) {
log_error("Failed to lock %s", lv->name);
vg_revert(lv->vg);
return 0;
}
if (!vg_commit(lv->vg)) {
unlock_lv(cmd, lv->lvid.s);
return 0;
}
log_very_verbose("Updating permissions for \"%s\" in kernel", lv->name);
if (!unlock_lv(cmd, lv->lvid.s)) {
log_error("Problem reactivating %s", lv->name);
return 0;
}
return 1;
}
static int lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle)
{
int doit = 0;
int archived = 0;
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))) {
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))) {
log_error("Can't change logical volume \"%s\" under snapshot",
lv->name);
return ECMD_FAILED;
}
if (lv_is_cow(lv)) {
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;
}
/* access permission change */
if (arg_count(cmd, permission_ARG)) {
if (!archive(lv->vg))
return ECMD_FAILED;
archived = 1;
doit += lvchange_permission(cmd, lv);
}
/* allocation policy change */
if (arg_count(cmd, contiguous_ARG)) {
if (!archived && !archive(lv->vg))
return ECMD_FAILED;
archived = 1;
doit += lvchange_contiguous(cmd, lv);
}
/* read ahead sector change */
if (arg_count(cmd, readahead_ARG)) {
if (!archived && !archive(lv->vg))
return ECMD_FAILED;
archived = 1;
doit += lvchange_readahead(cmd, lv);
}
/* read ahead sector change */
if (arg_count(cmd, persistent_ARG)) {
if (!archived && !archive(lv->vg))
return ECMD_FAILED;
archived = 1;
doit += lvchange_persistent(cmd, lv);
}
if (doit)
log_print("Logical volume \"%s\" changed", lv->name);
/* availability change */
if (arg_count(cmd, available_ARG))
if (!lvchange_availability(cmd, lv))
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)) {
log_error("One or more of -a, -C, -j, -m, -M, -p or -r "
"required");
return EINVALID_CMD_LINE;
}
if (arg_count(cmd, ignorelockingfailure_ARG) &&
(arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) ||
arg_count(cmd, readahead_ARG) || arg_count(cmd, persistent_ARG))) {
log_error("Only -a permitted with --ignorelockingfailure");
return EINVALID_CMD_LINE;
}
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;
}
return process_each_lv(cmd, argc, argv, LCK_VG_WRITE, NULL,
&lvchange_single);
}
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