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lvm2/tools/toollib.c
Petr Rockai f65dd341a5 locking: Make it possible to pass down an LV to activation code. 
Previously, we have relied on UUIDs alone, and on lvmcache to make getting a
"new copy" of VG metadata fast. If the code which triggers the activation has
the correct VG metadata at hand (the version which is currently on disk), it can
now hand it to the activation code directly.
2013-06-10 17:26:38 +02:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 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"
#include <sys/stat.h>
const char *command_name(struct cmd_context *cmd)
{
return cmd->command->name;
}
/*
* Strip dev_dir if present
*/
const char *skip_dev_dir(struct cmd_context *cmd, const char *vg_name,
unsigned *dev_dir_found)
{
const char *dmdir = dm_dir();
size_t dmdir_len = strlen(dmdir), vglv_sz;
char *vgname, *lvname, *layer, *vglv;
/* FIXME Do this properly */
if (*vg_name == '/') {
while (*vg_name == '/')
vg_name++;
vg_name--;
}
/* Reformat string if /dev/mapper found */
if (!strncmp(vg_name, dmdir, dmdir_len) && vg_name[dmdir_len] == '/') {
if (dev_dir_found)
*dev_dir_found = 1;
vg_name += dmdir_len;
while (*vg_name == '/')
vg_name++;
if (!dm_split_lvm_name(cmd->mem, vg_name, &vgname, &lvname, &layer) ||
*layer) {
log_error("skip_dev_dir: Couldn't split up device name %s",
vg_name);
return vg_name;
}
vglv_sz = strlen(vgname) + strlen(lvname) + 2;
if (!(vglv = dm_pool_alloc(cmd->mem, vglv_sz)) ||
dm_snprintf(vglv, vglv_sz, "%s%s%s", vgname,
*lvname ? "/" : "",
lvname) < 0) {
log_error("vg/lv string alloc failed");
return vg_name;
}
return vglv;
}
if (!strncmp(vg_name, cmd->dev_dir, strlen(cmd->dev_dir))) {
if (dev_dir_found)
*dev_dir_found = 1;
vg_name += strlen(cmd->dev_dir);
while (*vg_name == '/')
vg_name++;
} else if (dev_dir_found)
*dev_dir_found = 0;
return vg_name;
}
/*
* Metadata iteration functions
*/
int process_each_lv_in_vg(struct cmd_context *cmd,
struct volume_group *vg,
const struct dm_list *arg_lvnames,
const struct dm_list *tags,
struct dm_list *failed_lvnames,
void *handle,
process_single_lv_fn_t process_single_lv)
{
int ret_max = ECMD_PROCESSED;
int ret = 0;
unsigned process_all = 0;
unsigned process_lv = 0;
unsigned tags_supplied = 0;
unsigned lvargs_supplied = 0;
unsigned lvargs_matched = 0;
char *lv_name;
struct lv_list *lvl;
if (!vg_check_status(vg, EXPORTED_VG))
return ECMD_FAILED;
if (tags && !dm_list_empty(tags))
tags_supplied = 1;
if (arg_lvnames && !dm_list_empty(arg_lvnames))
lvargs_supplied = 1;
/* Process all LVs in this VG if no restrictions given */
if (!tags_supplied && !lvargs_supplied)
process_all = 1;
/* Or if VG tags match */
if (!process_lv && tags_supplied &&
str_list_match_list(tags, &vg->tags, NULL)) {
process_all = 1;
}
/*
* FIXME: In case of remove it goes through deleted entries,
* but it works since entries are allocated from vg mem pool.
*/
dm_list_iterate_items(lvl, &vg->lvs) {
if (lvl->lv->status & SNAPSHOT)
continue;
/* Skip availability change for non-virt snaps when processing all LVs */
/* FIXME: pass process_all to process_single_lv() */
if (process_all && arg_count(cmd, activate_ARG) &&
lv_is_cow(lvl->lv) && !lv_is_virtual_origin(origin_from_cow(lvl->lv)))
continue;
if (lv_is_virtual_origin(lvl->lv) && !arg_count(cmd, all_ARG))
continue;
/*
* Only let hidden LVs through it --all was used or the LVs
* were specifically named on the command line.
*/
if (!lvargs_supplied && !lv_is_visible(lvl->lv) && !arg_count(cmd, all_ARG))
continue;
/* Should we process this LV? */
if (process_all)
process_lv = 1;
else
process_lv = 0;
/* LV tag match? */
if (!process_lv && tags_supplied &&
str_list_match_list(tags, &lvl->lv->tags, NULL)) {
process_lv = 1;
}
/* LV name match? */
if (lvargs_supplied &&
str_list_match_item(arg_lvnames, lvl->lv->name)) {
process_lv = 1;
lvargs_matched++;
}
if (!process_lv)
continue;
lvl->lv->vg->cmd_missing_vgs = 0;
ret = process_single_lv(cmd, lvl->lv, handle);
if (ret != ECMD_PROCESSED && failed_lvnames) {
lv_name = dm_pool_strdup(cmd->mem, lvl->lv->name);
if (!lv_name ||
!str_list_add(cmd->mem, failed_lvnames, lv_name)) {
log_error("Allocation failed for str_list.");
return ECMD_FAILED;
}
if (lvl->lv->vg->cmd_missing_vgs)
ret = ECMD_PROCESSED;
}
if (ret > ret_max)
ret_max = ret;
if (sigint_caught()) {
stack;
return ret_max;
}
}
if (lvargs_supplied && lvargs_matched != dm_list_size(arg_lvnames)) {
/*
* FIXME: lvm supports removal of LV with all its dependencies
* this leads to miscalculation that depends on the order of args.
*/
log_error("One or more specified logical volume(s) not found.");
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
}
return ret_max;
}
int process_each_lv(struct cmd_context *cmd, int argc, char **argv,
uint32_t flags, void *handle,
process_single_lv_fn_t process_single_lv)
{
int opt = 0;
int ret_max = ECMD_PROCESSED;
int ret = 0;
struct dm_list *tags_arg;
struct dm_list *vgnames; /* VGs to process */
struct str_list *sll, *strl;
struct cmd_vg *cvl_vg;
struct dm_list cmd_vgs;
struct dm_list failed_lvnames;
struct dm_list tags, lvnames;
struct dm_list arg_lvnames; /* Cmdline vgname or vgname/lvname */
struct dm_list arg_vgnames;
char *vglv;
size_t vglv_sz;
const char *vgname;
dm_list_init(&tags);
dm_list_init(&arg_lvnames);
dm_list_init(&failed_lvnames);
if (argc) {
log_verbose("Using logical volume(s) on command line");
dm_list_init(&arg_vgnames);
for (; opt < argc; opt++) {
const char *lv_name = argv[opt];
const char *tmp_lv_name;
char *vgname_def;
unsigned dev_dir_found = 0;
/* Do we have a tag or vgname or lvname? */
vgname = lv_name;
if (*vgname == '@') {
if (!validate_tag(vgname + 1)) {
log_error("Skipping invalid tag %s",
vgname);
continue;
}
if (!str_list_add(cmd->mem, &tags,
dm_pool_strdup(cmd->mem,
vgname + 1))) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
continue;
}
/* FIXME Jumbled parsing */
vgname = skip_dev_dir(cmd, vgname, &dev_dir_found);
if (*vgname == '/') {
log_error("\"%s\": Invalid path for Logical "
"Volume", argv[opt]);
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
continue;
}
lv_name = vgname;
if ((tmp_lv_name = strchr(vgname, '/'))) {
/* Must be an LV */
lv_name = tmp_lv_name;
while (*lv_name == '/')
lv_name++;
if (!(vgname = extract_vgname(cmd, vgname))) {
if (ret_max < ECMD_FAILED) {
stack;
ret_max = ECMD_FAILED;
}
continue;
}
} else if (!dev_dir_found &&
(vgname_def = default_vgname(cmd))) {
vgname = vgname_def;
} else
lv_name = NULL;
if (!str_list_add(cmd->mem, &arg_vgnames,
dm_pool_strdup(cmd->mem, vgname))) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
if (!lv_name) {
if (!str_list_add(cmd->mem, &arg_lvnames,
dm_pool_strdup(cmd->mem,
vgname))) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
} else {
vglv_sz = strlen(vgname) + strlen(lv_name) + 2;
if (!(vglv = dm_pool_alloc(cmd->mem, vglv_sz)) ||
dm_snprintf(vglv, vglv_sz, "%s/%s", vgname,
lv_name) < 0) {
log_error("vg/lv string alloc failed");
return ECMD_FAILED;
}
if (!str_list_add(cmd->mem, &arg_lvnames, vglv)) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
}
}
vgnames = &arg_vgnames;
}
if (!argc || !dm_list_empty(&tags)) {
log_verbose("Finding all logical volumes");
if (!lvmetad_vg_list_to_lvmcache(cmd))
stack;
if (!(vgnames = get_vgnames(cmd, 0)) || dm_list_empty(vgnames)) {
log_error("No volume groups found");
return ret_max;
}
}
dm_list_iterate_items(strl, vgnames) {
vgname = strl->str;
dm_list_init(&cmd_vgs);
if (!(cvl_vg = cmd_vg_add(cmd->mem, &cmd_vgs,
vgname, NULL, flags))) {
stack;
return ECMD_FAILED;
}
if (!cmd_vg_read(cmd, &cmd_vgs)) {
free_cmd_vgs(&cmd_vgs);
if (ret_max < ECMD_FAILED) {
log_error("Skipping volume group %s", vgname);
ret_max = ECMD_FAILED;
} else
stack;
continue;
}
tags_arg = &tags;
dm_list_init(&lvnames); /* LVs to be processed in this VG */
dm_list_iterate_items(sll, &arg_lvnames) {
const char *vg_name = sll->str;
const char *lv_name = strchr(vg_name, '/');
if ((!lv_name && !strcmp(vg_name, vgname))) {
/* Process all LVs in this VG */
tags_arg = NULL;
dm_list_init(&lvnames);
break;
} else if (!strncmp(vg_name, vgname, strlen(vgname)) && lv_name &&
strlen(vgname) == (size_t) (lv_name - vg_name)) {
if (!str_list_add(cmd->mem, &lvnames,
dm_pool_strdup(cmd->mem,
lv_name + 1))) {
log_error("strlist allocation failed");
free_cmd_vgs(&cmd_vgs);
return ECMD_FAILED;
}
}
}
while (!sigint_caught()) {
ret = process_each_lv_in_vg(cmd, cvl_vg->vg, &lvnames,
tags_arg, &failed_lvnames,
handle, process_single_lv);
if (ret != ECMD_PROCESSED) {
stack;
break;
}
if (dm_list_empty(&failed_lvnames))
break;
/* Try again with failed LVs in this VG */
dm_list_init(&lvnames);
dm_list_splice(&lvnames, &failed_lvnames);
free_cmd_vgs(&cmd_vgs);
if (!cmd_vg_read(cmd, &cmd_vgs)) {
stack;
ret = ECMD_FAILED; /* break */
break;
}
}
if (ret > ret_max)
ret_max = ret;
free_cmd_vgs(&cmd_vgs);
/* FIXME: logic for breaking command is not consistent */
if (sigint_caught()) {
stack;
return ECMD_FAILED;
}
}
return ret_max;
}
int process_each_segment_in_pv(struct cmd_context *cmd,
struct volume_group *vg,
struct physical_volume *pv,
void *handle,
process_single_pvseg_fn_t process_single_pvseg)
{
struct pv_segment *pvseg;
struct pv_list *pvl;
const char *vg_name = NULL;
int ret_max = ECMD_PROCESSED;
int ret;
struct volume_group *old_vg = vg;
struct pv_segment _free_pv_segment = { .pv = pv };
if (is_pv(pv) && !vg && !is_orphan(pv)) {
vg_name = pv_vg_name(pv);
vg = vg_read(cmd, vg_name, NULL, 0);
if (vg_read_error(vg)) {
release_vg(vg);
log_error("Skipping volume group %s", vg_name);
return ECMD_FAILED;
}
/*
* Replace possibly incomplete PV structure with new one
* allocated in vg_read_internal() path.
*/
if (!(pvl = find_pv_in_vg(vg, pv_dev_name(pv)))) {
log_error("Unable to find %s in volume group %s",
pv_dev_name(pv), vg_name);
unlock_and_release_vg(cmd, vg, vg_name);
return ECMD_FAILED;
}
pv = pvl->pv;
}
if (dm_list_empty(&pv->segments)) {
ret = process_single_pvseg(cmd, NULL, &_free_pv_segment, handle);
if (ret > ret_max)
ret_max = ret;
} else
dm_list_iterate_items(pvseg, &pv->segments) {
ret = process_single_pvseg(cmd, vg, pvseg, handle);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
break;
}
if (vg_name)
unlock_vg(cmd, vg_name);
if (!old_vg)
release_vg(vg);
return ret_max;
}
int process_each_segment_in_lv(struct cmd_context *cmd,
struct logical_volume *lv,
void *handle,
process_single_seg_fn_t process_single_seg)
{
struct lv_segment *seg;
int ret_max = ECMD_PROCESSED;
int ret;
dm_list_iterate_items(seg, &lv->segments) {
ret = process_single_seg(cmd, seg, handle);
if (ret > ret_max)
ret_max = ret;
/* FIXME: logic for breaking command is not consistent */
if (sigint_caught())
return ECMD_FAILED;
}
return ret_max;
}
static int _process_one_vg(struct cmd_context *cmd, const char *vg_name,
const char *vgid,
struct dm_list *tags, struct dm_list *arg_vgnames,
uint32_t flags, void *handle, int ret_max,
process_single_vg_fn_t process_single_vg)
{
struct dm_list cmd_vgs;
struct cmd_vg *cvl_vg;
int ret = 0;
log_verbose("Finding volume group \"%s\"", vg_name);
dm_list_init(&cmd_vgs);
if (!(cvl_vg = cmd_vg_add(cmd->mem, &cmd_vgs, vg_name, vgid, flags)))
return_0;
for (;;) {
/* FIXME: consistent handling of command break */
if (sigint_caught()) {
ret = ECMD_FAILED;
break;
}
if (!cmd_vg_read(cmd, &cmd_vgs))
/* Allow FAILED_INCONSISTENT through only for vgcfgrestore */
if (vg_read_error(cvl_vg->vg) &&
(!((flags & READ_ALLOW_INCONSISTENT) &&
(vg_read_error(cvl_vg->vg) == FAILED_INCONSISTENT)))) {
ret = ECMD_FAILED;
break;
}
if (!dm_list_empty(tags) &&
/* Only process if a tag matches or it's on arg_vgnames */
!str_list_match_item(arg_vgnames, vg_name) &&
!str_list_match_list(tags, &cvl_vg->vg->tags, NULL))
break;
ret = process_single_vg(cmd, vg_name, cvl_vg->vg, handle);
if (vg_read_error(cvl_vg->vg)) /* FAILED_INCONSISTENT */
break;
if (!cvl_vg->vg->cmd_missing_vgs)
break;
free_cmd_vgs(&cmd_vgs);
}
free_cmd_vgs(&cmd_vgs);
return (ret > ret_max) ? ret : ret_max;
}
int process_each_vg(struct cmd_context *cmd, int argc, char **argv,
uint32_t flags, void *handle,
process_single_vg_fn_t process_single_vg)
{
int opt = 0;
int ret_max = ECMD_PROCESSED;
struct str_list *sl;
struct dm_list *vgnames, *vgids;
struct dm_list arg_vgnames, tags;
const char *vg_name, *vgid;
dm_list_init(&tags);
dm_list_init(&arg_vgnames);
if (argc) {
log_verbose("Using volume group(s) on command line");
for (; opt < argc; opt++) {
vg_name = argv[opt];
if (*vg_name == '@') {
if (!validate_tag(vg_name + 1)) {
log_error("Skipping invalid tag %s",
vg_name);
if (ret_max < EINVALID_CMD_LINE)
ret_max = EINVALID_CMD_LINE;
continue;
}
if (!str_list_add(cmd->mem, &tags,
dm_pool_strdup(cmd->mem,
vg_name + 1))) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
continue;
}
vg_name = skip_dev_dir(cmd, vg_name, NULL);
if (strchr(vg_name, '/')) {
log_error("Invalid volume group name: %s",
vg_name);
if (ret_max < EINVALID_CMD_LINE)
ret_max = EINVALID_CMD_LINE;
continue;
}
if (!str_list_add(cmd->mem, &arg_vgnames,
dm_pool_strdup(cmd->mem, vg_name))) {
log_error("strlist allocation failed");
return ECMD_FAILED;
}
}
vgnames = &arg_vgnames;
}
if (!argc || !dm_list_empty(&tags)) {
log_verbose("Finding all volume groups");
if (!lvmetad_vg_list_to_lvmcache(cmd))
stack;
if (!(vgids = get_vgids(cmd, 0)) || dm_list_empty(vgids)) {
log_error("No volume groups found");
return ret_max;
}
dm_list_iterate_items(sl, vgids) {
vgid = sl->str;
if (!(vgid) || !(vg_name = lvmcache_vgname_from_vgid(cmd->mem, vgid)))
continue;
ret_max = _process_one_vg(cmd, vg_name, vgid, &tags,
&arg_vgnames,
flags, handle,
ret_max, process_single_vg);
if (sigint_caught())
return ret_max;
}
} else {
dm_list_iterate_items(sl, vgnames) {
vg_name = sl->str;
if (is_orphan_vg(vg_name))
continue; /* FIXME Unnecessary? */
ret_max = _process_one_vg(cmd, vg_name, NULL, &tags,
&arg_vgnames,
flags, handle,
ret_max, process_single_vg);
if (sigint_caught())
return ret_max;
}
}
return ret_max;
}
int process_each_pv_in_vg(struct cmd_context *cmd, struct volume_group *vg,
const struct dm_list *tags, void *handle,
process_single_pv_fn_t process_single_pv)
{
int ret_max = ECMD_PROCESSED;
int ret = 0;
struct pv_list *pvl;
dm_list_iterate_items(pvl, &vg->pvs) {
if (tags && !dm_list_empty(tags) &&
!str_list_match_list(tags, &pvl->pv->tags, NULL)) {
continue;
}
if ((ret = process_single_pv(cmd, vg, pvl->pv, handle)) > ret_max)
ret_max = ret;
if (sigint_caught())
return ret_max;
}
return ret_max;
}
static int _process_all_devs(struct cmd_context *cmd, void *handle,
process_single_pv_fn_t process_single_pv)
{
struct physical_volume *pv;
struct physical_volume pv_dummy;
struct dev_iter *iter;
struct device *dev;
int ret_max = ECMD_PROCESSED;
int ret = 0;
if (!scan_vgs_for_pvs(cmd, 1)) {
stack;
return ECMD_FAILED;
}
if (!(iter = dev_iter_create(cmd->filter, 1))) {
log_error("dev_iter creation failed");
return ECMD_FAILED;
}
while ((dev = dev_iter_get(iter))) {
if (!(pv = pv_read(cmd, dev_name(dev), 0, 0))) {
memset(&pv_dummy, 0, sizeof(pv_dummy));
dm_list_init(&pv_dummy.tags);
dm_list_init(&pv_dummy.segments);
pv_dummy.dev = dev;
pv = &pv_dummy;
}
ret = process_single_pv(cmd, NULL, pv, handle);
free_pv_fid(pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
break;
}
dev_iter_destroy(iter);
return ret_max;
}
/*
* If the lock_type is LCK_VG_READ (used only in reporting commands),
* we lock VG_GLOBAL to enable use of metadata cache.
* This can pause alongide pvscan or vgscan process for a while.
*/
int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
struct volume_group *vg, uint32_t flags,
int scan_label_only, void *handle,
process_single_pv_fn_t process_single_pv)
{
int opt = 0;
int ret_max = ECMD_PROCESSED;
int ret = 0;
int lock_global = !(flags & READ_WITHOUT_LOCK) && !(flags & READ_FOR_UPDATE) && !lvmetad_active();
struct pv_list *pvl;
struct physical_volume *pv;
struct dm_list *pvslist, *vgnames;
struct dm_list tags;
struct str_list *sll;
char *at_sign, *tagname;
int scanned = 0;
dm_list_init(&tags);
if (lock_global && !lock_vol(cmd, VG_GLOBAL, LCK_VG_READ, NULL)) {
log_error("Unable to obtain global lock.");
return ECMD_FAILED;
}
if (argc) {
log_verbose("Using physical volume(s) on command line");
for (; opt < argc; opt++) {
dm_unescape_colons_and_at_signs(argv[opt], NULL, &at_sign);
if (at_sign && (at_sign == argv[opt])) {
tagname = at_sign + 1;
if (!validate_tag(tagname)) {
log_error("Skipping invalid tag %s",
tagname);
if (ret_max < EINVALID_CMD_LINE)
ret_max = EINVALID_CMD_LINE;
continue;
}
if (!str_list_add(cmd->mem, &tags,
dm_pool_strdup(cmd->mem,
tagname))) {
log_error("strlist allocation failed");
goto bad;
}
continue;
}
if (vg) {
if (!(pvl = find_pv_in_vg(vg, argv[opt]))) {
log_error("Physical Volume \"%s\" not "
"found in Volume Group "
"\"%s\"", argv[opt],
vg->name);
ret_max = ECMD_FAILED;
continue;
}
pv = pvl->pv;
} else {
if (!(pv = pv_read(cmd, argv[opt],
1, scan_label_only))) {
log_error("Failed to read physical "
"volume \"%s\"", argv[opt]);
ret_max = ECMD_FAILED;
continue;
}
/*
* If a PV has no MDAs it may appear to be an
* orphan until the metadata is read off
* another PV in the same VG. Detecting this
* means checking every VG by scanning every
* PV on the system.
*/
if (!scanned && is_orphan(pv) &&
!dm_list_size(&pv->fid->metadata_areas_in_use)) {
if (!scan_label_only &&
!scan_vgs_for_pvs(cmd, 1)) {
stack;
ret_max = ECMD_FAILED;
continue;
}
scanned = 1;
free_pv_fid(pv);
if (!(pv = pv_read(cmd, argv[opt],
1,
scan_label_only))) {
log_error("Failed to read "
"physical volume "
"\"%s\"", argv[opt]);
ret_max = ECMD_FAILED;
continue;
}
}
}
ret = process_single_pv(cmd, vg, pv, handle);
/*
* Free PV only if we called pv_read before,
* otherwise the PV structure is part of the VG.
*/
if (!vg)
free_pv_fid(pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
}
if (!dm_list_empty(&tags) && (vgnames = get_vgnames(cmd, 1)) &&
!dm_list_empty(vgnames)) {
dm_list_iterate_items(sll, vgnames) {
vg = vg_read(cmd, sll->str, NULL, flags);
if (vg_read_error(vg)) {
ret_max = ECMD_FAILED;
release_vg(vg);
stack;
continue;
}
ret = process_each_pv_in_vg(cmd, vg, &tags,
handle,
process_single_pv);
unlock_and_release_vg(cmd, vg, sll->str);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
}
}
} else {
if (vg) {
log_verbose("Using all physical volume(s) in "
"volume group");
ret = process_each_pv_in_vg(cmd, vg, NULL, handle,
process_single_pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
} else if (arg_count(cmd, all_ARG)) {
ret = _process_all_devs(cmd, handle, process_single_pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
} else {
log_verbose("Scanning for physical volume names");
lvmcache_seed_infos_from_lvmetad(cmd);
if (!(pvslist = get_pvs(cmd)))
goto bad;
dm_list_iterate_items(pvl, pvslist) {
ret = process_single_pv(cmd, NULL, pvl->pv,
handle);
free_pv_fid(pvl->pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
}
}
}
out:
if (lock_global)
unlock_vg(cmd, VG_GLOBAL);
return ret_max;
bad:
if (lock_global)
unlock_vg(cmd, VG_GLOBAL);
return ECMD_FAILED;
}
/*
* Determine volume group name from a logical volume name
*/
const char *extract_vgname(struct cmd_context *cmd, const char *lv_name)
{
const char *vg_name = lv_name;
char *st;
char *dev_dir = cmd->dev_dir;
/* Path supplied? */
if (vg_name && strchr(vg_name, '/')) {
/* Strip dev_dir (optional) */
if (*vg_name == '/') {
while (*vg_name == '/')
vg_name++;
vg_name--;
}
if (!strncmp(vg_name, dev_dir, strlen(dev_dir))) {
vg_name += strlen(dev_dir);
while (*vg_name == '/')
vg_name++;
}
if (*vg_name == '/') {
log_error("\"%s\": Invalid path for Logical "
"Volume", lv_name);
return 0;
}
/* Require exactly one set of consecutive slashes */
if ((st = strchr(vg_name, '/')))
while (*st == '/')
st++;
if (!st || strchr(st, '/')) {
log_error("\"%s\": Invalid path for Logical Volume",
lv_name);
return 0;
}
vg_name = dm_pool_strdup(cmd->mem, vg_name);
if (!vg_name) {
log_error("Allocation of vg_name failed");
return 0;
}
*strchr(vg_name, '/') = '\0';
return vg_name;
}
if (!(vg_name = default_vgname(cmd))) {
if (lv_name)
log_error("Path required for Logical Volume \"%s\"",
lv_name);
return 0;
}
return vg_name;
}
/*
* Extract default volume group name from environment
*/
char *default_vgname(struct cmd_context *cmd)
{
const char *vg_path;
/* Take default VG from environment? */
vg_path = getenv("LVM_VG_NAME");
if (!vg_path)
return 0;
vg_path = skip_dev_dir(cmd, vg_path, NULL);
if (strchr(vg_path, '/')) {
log_error("Environment Volume Group in LVM_VG_NAME invalid: "
"\"%s\"", vg_path);
return 0;
}
return dm_pool_strdup(cmd->mem, vg_path);
}
/*
* Process physical extent range specifiers
*/
static int _add_pe_range(struct dm_pool *mem, const char *pvname,
struct dm_list *pe_ranges, uint32_t start, uint32_t count)
{
struct pe_range *per;
log_debug("Adding PE range: start PE %" PRIu32 " length %" PRIu32
" on %s", start, count, pvname);
/* Ensure no overlap with existing areas */
dm_list_iterate_items(per, pe_ranges) {
if (((start < per->start) && (start + count - 1 >= per->start))
|| ((start >= per->start) &&
(per->start + per->count - 1) >= start)) {
log_error("Overlapping PE ranges specified (%" PRIu32
"-%" PRIu32 ", %" PRIu32 "-%" PRIu32 ")"
" on %s",
start, start + count - 1, per->start,
per->start + per->count - 1, pvname);
return 0;
}
}
if (!(per = dm_pool_alloc(mem, sizeof(*per)))) {
log_error("Allocation of list failed");
return 0;
}
per->start = start;
per->count = count;
dm_list_add(pe_ranges, &per->list);
return 1;
}
static int xstrtouint32(const char *s, char **p, int base, uint32_t *result)
{
unsigned long ul;
errno = 0;
ul = strtoul(s, p, base);
if (errno || *p == s || ul > UINT32_MAX)
return 0;
*result = ul;
return 1;
}
static int _parse_pes(struct dm_pool *mem, char *c, struct dm_list *pe_ranges,
const char *pvname, uint32_t size)
{
char *endptr;
uint32_t start, end;
/* Default to whole PV */
if (!c) {
if (!_add_pe_range(mem, pvname, pe_ranges, UINT32_C(0), size))
return_0;
return 1;
}
while (*c) {
if (*c != ':')
goto error;
c++;
/* Disallow :: and :\0 */
if (*c == ':' || !*c)
goto error;
/* Default to whole range */
start = UINT32_C(0);
end = size - 1;
/* Start extent given? */
if (isdigit(*c)) {
if (!xstrtouint32(c, &endptr, 10, &start))
goto error;
c = endptr;
/* Just one number given? */
if (!*c || *c == ':')
end = start;
}
/* Range? */
if (*c == '-') {
c++;
if (isdigit(*c)) {
if (!xstrtouint32(c, &endptr, 10, &end))
goto error;
c = endptr;
}
}
if (*c && *c != ':')
goto error;
if ((start > end) || (end > size - 1)) {
log_error("PE range error: start extent %" PRIu32 " to "
"end extent %" PRIu32, start, end);
return 0;
}
if (!_add_pe_range(mem, pvname, pe_ranges, start, end - start + 1))
return_0;
}
return 1;
error:
log_error("Physical extent parsing error at %s", c);
return 0;
}
static int _create_pv_entry(struct dm_pool *mem, struct pv_list *pvl,
char *colon, int allocatable_only, struct dm_list *r)
{
const char *pvname;
struct pv_list *new_pvl = NULL, *pvl2;
struct dm_list *pe_ranges;
pvname = pv_dev_name(pvl->pv);
if (allocatable_only && !(pvl->pv->status & ALLOCATABLE_PV)) {
log_warn("Physical volume %s not allocatable.", pvname);
return 1;
}
if (allocatable_only && is_missing_pv(pvl->pv)) {
log_warn("Physical volume %s is missing.", pvname);
return 1;
}
if (allocatable_only &&
(pvl->pv->pe_count == pvl->pv->pe_alloc_count)) {
log_warn("No free extents on physical volume \"%s\".", pvname);
return 1;
}
dm_list_iterate_items(pvl2, r)
if (pvl->pv->dev == pvl2->pv->dev) {
new_pvl = pvl2;
break;
}
if (!new_pvl) {
if (!(new_pvl = dm_pool_alloc(mem, sizeof(*new_pvl)))) {
log_error("Unable to allocate physical volume list.");
return 0;
}
memcpy(new_pvl, pvl, sizeof(*new_pvl));
if (!(pe_ranges = dm_pool_alloc(mem, sizeof(*pe_ranges)))) {
log_error("Allocation of pe_ranges list failed");
return 0;
}
dm_list_init(pe_ranges);
new_pvl->pe_ranges = pe_ranges;
dm_list_add(r, &new_pvl->list);
}
/* Determine selected physical extents */
if (!_parse_pes(mem, colon, new_pvl->pe_ranges, pv_dev_name(pvl->pv),
pvl->pv->pe_count))
return_0;
return 1;
}
struct dm_list *create_pv_list(struct dm_pool *mem, struct volume_group *vg, int argc,
char **argv, int allocatable_only)
{
struct dm_list *r;
struct pv_list *pvl;
struct dm_list tags, arg_pvnames;
char *pvname = NULL;
char *colon, *at_sign, *tagname;
int i;
/* Build up list of PVs */
if (!(r = dm_pool_alloc(mem, sizeof(*r)))) {
log_error("Allocation of list failed");
return NULL;
}
dm_list_init(r);
dm_list_init(&tags);
dm_list_init(&arg_pvnames);
for (i = 0; i < argc; i++) {
dm_unescape_colons_and_at_signs(argv[i], &colon, &at_sign);
if (at_sign && (at_sign == argv[i])) {
tagname = at_sign + 1;
if (!validate_tag(tagname)) {
log_error("Skipping invalid tag %s", tagname);
continue;
}
dm_list_iterate_items(pvl, &vg->pvs) {
if (str_list_match_item(&pvl->pv->tags,
tagname)) {
if (!_create_pv_entry(mem, pvl, NULL,
allocatable_only,
r))
return_NULL;
}
}
continue;
}
pvname = argv[i];
if (colon && !(pvname = dm_pool_strndup(mem, pvname,
(unsigned) (colon - pvname)))) {
log_error("Failed to clone PV name");
return NULL;
}
if (!(pvl = find_pv_in_vg(vg, pvname))) {
log_error("Physical Volume \"%s\" not found in "
"Volume Group \"%s\"", pvname, vg->name);
return NULL;
}
if (!_create_pv_entry(mem, pvl, colon, allocatable_only, r))
return_NULL;
}
if (dm_list_empty(r))
log_error("No specified PVs have space available");
return dm_list_empty(r) ? NULL : r;
}
struct dm_list *clone_pv_list(struct dm_pool *mem, struct dm_list *pvsl)
{
struct dm_list *r;
struct pv_list *pvl, *new_pvl;
/* Build up list of PVs */
if (!(r = dm_pool_alloc(mem, sizeof(*r)))) {
log_error("Allocation of list failed");
return NULL;
}
dm_list_init(r);
dm_list_iterate_items(pvl, pvsl) {
if (!(new_pvl = dm_pool_zalloc(mem, sizeof(*new_pvl)))) {
log_error("Unable to allocate physical volume list.");
return NULL;
}
memcpy(new_pvl, pvl, sizeof(*new_pvl));
dm_list_add(r, &new_pvl->list);
}
return r;
}
void vgcreate_params_set_defaults(struct vgcreate_params *vp_def,
struct volume_group *vg)
{
if (vg) {
vp_def->vg_name = NULL;
vp_def->extent_size = vg->extent_size;
vp_def->max_pv = vg->max_pv;
vp_def->max_lv = vg->max_lv;
vp_def->alloc = vg->alloc;
vp_def->clustered = vg_is_clustered(vg);
vp_def->vgmetadatacopies = vg->mda_copies;
} else {
vp_def->vg_name = NULL;
vp_def->extent_size = DEFAULT_EXTENT_SIZE * 2;
vp_def->max_pv = DEFAULT_MAX_PV;
vp_def->max_lv = DEFAULT_MAX_LV;
vp_def->alloc = DEFAULT_ALLOC_POLICY;
vp_def->clustered = DEFAULT_CLUSTERED;
vp_def->vgmetadatacopies = DEFAULT_VGMETADATACOPIES;
}
}
/*
* Set members of struct vgcreate_params from cmdline arguments.
* Do preliminary validation with arg_*() interface.
* Further, more generic validation is done in validate_vgcreate_params().
* This function is to remain in tools directory.
*/
int vgcreate_params_set_from_args(struct cmd_context *cmd,
struct vgcreate_params *vp_new,
struct vgcreate_params *vp_def)
{
vp_new->vg_name = skip_dev_dir(cmd, vp_def->vg_name, NULL);
vp_new->max_lv = arg_uint_value(cmd, maxlogicalvolumes_ARG,
vp_def->max_lv);
vp_new->max_pv = arg_uint_value(cmd, maxphysicalvolumes_ARG,
vp_def->max_pv);
vp_new->alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, vp_def->alloc);
/* Units of 512-byte sectors */
vp_new->extent_size =
arg_uint_value(cmd, physicalextentsize_ARG, vp_def->extent_size);
if (arg_count(cmd, clustered_ARG))
vp_new->clustered =
!strcmp(arg_str_value(cmd, clustered_ARG,
vp_def->clustered ? "y":"n"), "y");
else
/* Default depends on current locking type */
vp_new->clustered = locking_is_clustered();
if (arg_sign_value(cmd, physicalextentsize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Physical extent size may not be negative");
return 0;
}
if (arg_uint64_value(cmd, physicalextentsize_ARG, 0) > MAX_EXTENT_SIZE) {
log_error("Physical extent size cannot be larger than %s",
display_size(cmd, (uint64_t) MAX_EXTENT_SIZE));
return 0;
}
if (arg_sign_value(cmd, maxlogicalvolumes_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Max Logical Volumes may not be negative");
return 0;
}
if (arg_sign_value(cmd, maxphysicalvolumes_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Max Physical Volumes may not be negative");
return 0;
}
if (arg_count(cmd, metadatacopies_ARG)) {
vp_new->vgmetadatacopies = arg_int_value(cmd, metadatacopies_ARG,
DEFAULT_VGMETADATACOPIES);
} else if (arg_count(cmd, vgmetadatacopies_ARG)) {
vp_new->vgmetadatacopies = arg_int_value(cmd, vgmetadatacopies_ARG,
DEFAULT_VGMETADATACOPIES);
} else {
vp_new->vgmetadatacopies = find_config_tree_int(cmd, metadata_vgmetadatacopies_CFG);
}
return 1;
}
/* Shared code for changing activation state for vgchange/lvchange */
int lv_change_activate(struct cmd_context *cmd, struct logical_volume *lv,
activation_change_t activate)
{
if (!lv_active_change(cmd, lv, activate))
return_0;
if (background_polling() &&
(activate != CHANGE_AN) &&
(activate != CHANGE_ALN) &&
(lv->status & (PVMOVE|CONVERTING|MERGING)))
lv_spawn_background_polling(cmd, lv);
return 1;
}
int lv_refresh(struct cmd_context *cmd, struct logical_volume *lv)
{
int r = 0;
if (!cmd->partial_activation && (lv->status & PARTIAL_LV)) {
log_error("Refusing refresh of partial LV %s. Use --partial to override.",
lv->name);
goto out;
}
r = suspend_lv(cmd, lv);
if (!r)
goto_out;
r = resume_lv(cmd, lv);
if (!r)
goto_out;
/*
* check if snapshot merge should be polled
* - unfortunately: even though the dev_manager will clear
* the lv's merge attributes if a merge is not possible;
* it is clearing a different instance of the lv (as
* retrieved with lv_from_lvid)
* - fortunately: polldaemon will immediately shutdown if the
* origin doesn't have a status with a snapshot percentage
*/
if (background_polling() && lv_is_origin(lv) && lv_is_merging_origin(lv))
lv_spawn_background_polling(cmd, lv);
out:
return r;
}
int vg_refresh_visible(struct cmd_context *cmd, struct volume_group *vg)
{
struct lv_list *lvl;
int r = 1;
sigint_allow();
dm_list_iterate_items(lvl, &vg->lvs) {
if (sigint_caught())
return_0;
if (lv_is_visible(lvl->lv))
if (!lv_refresh(cmd, lvl->lv))
r = 0;
}
sigint_restore();
return r;
}
void lv_spawn_background_polling(struct cmd_context *cmd,
struct logical_volume *lv)
{
const char *pvname;
if ((lv->status & PVMOVE) &&
(pvname = get_pvmove_pvname_from_lv_mirr(lv))) {
log_verbose("Spawning background pvmove process for %s",
pvname);
pvmove_poll(cmd, pvname, 1);
} else if ((lv->status & LOCKED) &&
(pvname = get_pvmove_pvname_from_lv(lv))) {
log_verbose("Spawning background pvmove process for %s",
pvname);
pvmove_poll(cmd, pvname, 1);
}
if (lv->status & (CONVERTING|MERGING)) {
log_verbose("Spawning background lvconvert process for %s",
lv->name);
lvconvert_poll(cmd, lv, 1);
}
}
/*
* Intial sanity checking of non-recovery related command-line arguments.
*
* Output arguments:
* pp: structure allocated by caller, fields written / validated here
*/
int pvcreate_params_validate(struct cmd_context *cmd,
int argc, char **argv,
struct pvcreate_params *pp)
{
if (!argc) {
log_error("Please enter a physical volume path");
return 0;
}
pp->yes = arg_count(cmd, yes_ARG);
pp->force = (force_t) arg_count(cmd, force_ARG);
if (arg_int_value(cmd, labelsector_ARG, 0) >= LABEL_SCAN_SECTORS) {
log_error("labelsector must be less than %lu",
LABEL_SCAN_SECTORS);
return 0;
} else {
pp->labelsector = arg_int64_value(cmd, labelsector_ARG,
DEFAULT_LABELSECTOR);
}
if (!(cmd->fmt->features & FMT_MDAS) &&
(arg_count(cmd, pvmetadatacopies_ARG) ||
arg_count(cmd, metadatasize_ARG) ||
arg_count(cmd, dataalignment_ARG) ||
arg_count(cmd, dataalignmentoffset_ARG))) {
log_error("Metadata and data alignment parameters only "
"apply to text format.");
return 0;
}
if (!(cmd->fmt->features & FMT_BAS) &&
arg_count(cmd, bootloaderareasize_ARG)) {
log_error("Bootloader area parameters only "
"apply to text format.");
return 0;
}
if (arg_count(cmd, pvmetadatacopies_ARG) &&
arg_int_value(cmd, pvmetadatacopies_ARG, -1) > 2) {
log_error("Metadatacopies may only be 0, 1 or 2");
return 0;
}
if (arg_count(cmd, metadataignore_ARG))
pp->metadataignore = arg_int_value(cmd, metadataignore_ARG,
DEFAULT_PVMETADATAIGNORE);
else
pp->metadataignore = find_config_tree_bool(cmd, metadata_pvmetadataignore_CFG);
if (arg_count(cmd, pvmetadatacopies_ARG) &&
!arg_int_value(cmd, pvmetadatacopies_ARG, -1) &&
pp->metadataignore) {
log_error("metadataignore only applies to metadatacopies > 0");
return 0;
}
if (arg_count(cmd, zero_ARG))
pp->zero = strcmp(arg_str_value(cmd, zero_ARG, "y"), "n");
if (arg_sign_value(cmd, dataalignment_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Physical volume data alignment may not be negative");
return 0;
}
pp->data_alignment = arg_uint64_value(cmd, dataalignment_ARG, UINT64_C(0));
if (pp->data_alignment > UINT32_MAX) {
log_error("Physical volume data alignment is too big.");
return 0;
}
if (pp->data_alignment && pp->rp.pe_start != PV_PE_START_CALC) {
if (pp->rp.pe_start % pp->data_alignment)
log_warn("WARNING: Ignoring data alignment %" PRIu64
" incompatible with --restorefile value (%"
PRIu64").", pp->data_alignment, pp->rp.pe_start);
pp->data_alignment = 0;
}
if (arg_sign_value(cmd, dataalignmentoffset_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Physical volume data alignment offset may not be negative");
return 0;
}
pp->data_alignment_offset = arg_uint64_value(cmd, dataalignmentoffset_ARG, UINT64_C(0));
if (pp->data_alignment_offset > UINT32_MAX) {
log_error("Physical volume data alignment offset is too big.");
return 0;
}
if (pp->data_alignment_offset && pp->rp.pe_start != PV_PE_START_CALC) {
log_warn("WARNING: Ignoring data alignment offset %" PRIu64
" incompatible with --restorefile value (%"
PRIu64").", pp->data_alignment_offset, pp->rp.pe_start);
pp->data_alignment_offset = 0;
}
if (arg_sign_value(cmd, metadatasize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Metadata size may not be negative");
return 0;
}
if (arg_sign_value(cmd, bootloaderareasize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Bootloader area size may not be negative");
return 0;
}
pp->pvmetadatasize = arg_uint64_value(cmd, metadatasize_ARG, UINT64_C(0));
if (!pp->pvmetadatasize)
pp->pvmetadatasize = find_config_tree_int(cmd, metadata_pvmetadatasize_CFG);
pp->pvmetadatacopies = arg_int_value(cmd, pvmetadatacopies_ARG, -1);
if (pp->pvmetadatacopies < 0)
pp->pvmetadatacopies = find_config_tree_int(cmd, metadata_pvmetadatacopies_CFG);
pp->rp.ba_size = arg_uint64_value(cmd, bootloaderareasize_ARG, pp->rp.ba_size);
return 1;
}
int get_activation_monitoring_mode(struct cmd_context *cmd,
int *monitoring_mode)
{
*monitoring_mode = DEFAULT_DMEVENTD_MONITOR;
if (arg_count(cmd, monitor_ARG) &&
(arg_count(cmd, ignoremonitoring_ARG) ||
arg_count(cmd, sysinit_ARG))) {
log_error("--ignoremonitoring or --sysinit option not allowed with --monitor option");
return 0;
}
if (arg_count(cmd, monitor_ARG))
*monitoring_mode = arg_int_value(cmd, monitor_ARG,
DEFAULT_DMEVENTD_MONITOR);
else if (is_static() || arg_count(cmd, ignoremonitoring_ARG) ||
arg_count(cmd, sysinit_ARG) ||
!find_config_tree_bool(cmd, activation_monitoring_CFG))
*monitoring_mode = DMEVENTD_MONITOR_IGNORE;
return 1;
}
int get_pool_params(struct cmd_context *cmd, int *passed_args,
uint32_t *chunk_size,
thin_discards_t *discards,
uint64_t *pool_metadata_size,
int *zero)
{
const char *dstr;
*passed_args = 0;
if (arg_count(cmd, zero_ARG)) {
*passed_args |= PASS_ARG_ZERO;
*zero = strcmp(arg_str_value(cmd, zero_ARG, "y"), "n");
log_very_verbose("Setting pool zeroing: %u", *zero);
} else
*zero = find_config_tree_bool(cmd, allocation_thin_pool_zero_CFG);
if (arg_count(cmd, discards_ARG)) {
*passed_args |= PASS_ARG_DISCARDS;
*discards = (thin_discards_t) arg_uint_value(cmd, discards_ARG, 0);
log_very_verbose("Setting pool discards: %s",
get_pool_discards_name(*discards));
} else {
dstr = find_config_tree_str(cmd, allocation_thin_pool_discards_CFG);
if (!get_pool_discards(dstr, discards))
return_0;
}
if (arg_count(cmd, chunksize_ARG)) {
if (arg_sign_value(cmd, chunksize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Negative chunk size is invalid.");
return 0;
}
*passed_args |= PASS_ARG_CHUNK_SIZE;
*chunk_size = arg_uint_value(cmd, chunksize_ARG,
DM_THIN_MIN_DATA_BLOCK_SIZE);
log_very_verbose("Setting pool chunk size: %s",
display_size(cmd, *chunk_size));
} else
*chunk_size = find_config_tree_int(cmd, allocation_thin_pool_chunk_size_CFG) * 2;
if ((*chunk_size < DM_THIN_MIN_DATA_BLOCK_SIZE) ||
(*chunk_size > DM_THIN_MAX_DATA_BLOCK_SIZE)) {
log_error("Chunk size must be in the range %s to %s.",
display_size(cmd, DM_THIN_MIN_DATA_BLOCK_SIZE),
display_size(cmd, DM_THIN_MAX_DATA_BLOCK_SIZE));
return 0;
}
if (arg_count(cmd, poolmetadatasize_ARG)) {
if (arg_sign_value(cmd, poolmetadatasize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Negative pool metadata size is invalid.");
return 0;
}
*passed_args |= PASS_ARG_POOL_METADATA_SIZE;
}
*pool_metadata_size = arg_uint64_value(cmd, poolmetadatasize_ARG, UINT64_C(0));
return 1;
}
struct logical_volume *alloc_pool_metadata(struct logical_volume *pool_lv,
alloc_policy_t alloc,
const char *name,
struct dm_list *pvh,
uint32_t read_ahead,
uint32_t stripes,
uint32_t stripe_size,
uint64_t size)
{
struct logical_volume *metadata_lv;
struct lvcreate_params lvc;
/* FIXME: Make lvm2api usable */
memset(&lvc, 0, sizeof(lvc));
if (!(lvc.extents = extents_from_size(pool_lv->vg->cmd, size,
pool_lv->vg->extent_size)))
return_0;
if (!(lvc.segtype = get_segtype_from_string(pool_lv->vg->cmd, "striped")))
return_0;
dm_list_init(&lvc.tags);
/* FIXME: allocate properly space for metadata_lv */
lvc.activate = CHANGE_ALY;
lvc.alloc = alloc;
lvc.lv_name = name;
lvc.major = -1;
lvc.minor = -1;
lvc.permission = LVM_READ | LVM_WRITE;
lvc.pvh = pvh;
lvc.read_ahead = read_ahead;
lvc.stripe_size = stripe_size;
lvc.stripes = stripes;
lvc.vg_name = pool_lv->vg->name;
lvc.zero = 1;
if (!(metadata_lv = lv_create_single(pool_lv->vg, &lvc)))
return_0;
return metadata_lv;
}
/*
* Generic stripe parameter checks.
*/
static int _validate_stripe_params(struct cmd_context *cmd, uint32_t *stripes,
uint32_t *stripe_size)
{
if (*stripes == 1 && *stripe_size) {
log_print_unless_silent("Ignoring stripesize argument with single stripe");
*stripe_size = 0;
}
if (*stripes > 1 && !*stripe_size) {
*stripe_size = find_config_tree_int(cmd, metadata_stripesize_CFG) * 2;
log_print_unless_silent("Using default stripesize %s",
display_size(cmd, (uint64_t) *stripe_size));
}
if (*stripes < 1 || *stripes > MAX_STRIPES) {
log_error("Number of stripes (%d) must be between %d and %d",
*stripes, 1, MAX_STRIPES);
return 0;
}
if (*stripes > 1 && (*stripe_size < STRIPE_SIZE_MIN ||
*stripe_size & (*stripe_size - 1))) {
log_error("Invalid stripe size %s",
display_size(cmd, (uint64_t) *stripe_size));
return 0;
}
return 1;
}
/*
* The stripe size is limited by the size of a uint32_t, but since the
* value given by the user is doubled, and the final result must be a
* power of 2, we must divide UINT_MAX by four and add 1 (to round it
* up to the power of 2)
*/
int get_stripe_params(struct cmd_context *cmd, uint32_t *stripes, uint32_t *stripe_size)
{
/* stripes_long_ARG takes precedence (for lvconvert) */
*stripes = arg_uint_value(cmd, arg_count(cmd, stripes_long_ARG) ? stripes_long_ARG : stripes_ARG, 1);
*stripe_size = arg_uint_value(cmd, stripesize_ARG, 0);
if (*stripe_size) {
if (arg_sign_value(cmd, stripesize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Negative stripesize is invalid");
return 0;
}
if(arg_uint64_value(cmd, stripesize_ARG, 0) > STRIPE_SIZE_LIMIT * 2) {
log_error("Stripe size cannot be larger than %s",
display_size(cmd, (uint64_t) STRIPE_SIZE_LIMIT));
return 0;
}
}
return _validate_stripe_params(cmd, stripes, stripe_size);
}
/* FIXME move to lib */
static int _pv_change_tag(struct physical_volume *pv, const char *tag, int addtag)
{
if (addtag) {
if (!str_list_add(pv->fmt->cmd->mem, &pv->tags, tag)) {
log_error("Failed to add tag %s to physical volume %s",
tag, pv_dev_name(pv));
return 0;
}
} else
str_list_del(&pv->tags, tag);
return 1;
}
/* Set exactly one of VG, LV or PV */
int change_tag(struct cmd_context *cmd, struct volume_group *vg,
struct logical_volume *lv, struct physical_volume *pv, int arg)
{
const char *tag;
struct arg_value_group_list *current_group;
dm_list_iterate_items(current_group, &cmd->arg_value_groups) {
if (!grouped_arg_is_set(current_group->arg_values, arg))
continue;
if (!(tag = grouped_arg_str_value(current_group->arg_values, arg, NULL))) {
log_error("Failed to get tag");
return 0;
}
if (vg && !vg_change_tag(vg, tag, arg == addtag_ARG))
return_0;
else if (lv && !lv_change_tag(lv, tag, arg == addtag_ARG))
return_0;
else if (pv && !_pv_change_tag(pv, tag, arg == addtag_ARG))
return_0;
}
return 1;
}
/* Return percents of extents and avoid overflow, with optional roundup */
uint32_t percent_of_extents(uint32_t percents, uint32_t count, int roundup)
{
return (uint32_t)(((uint64_t)percents * (uint64_t)count +
((roundup) ? 99 : 0)) / 100);
}
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