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lvm2/tools/toollib.c
Peter Rajnoha 305816232d Remove useless mdas parameter for pv_read (from now on, we store mdas in a 
format instance)
2011-02-21 12:15:59 +00:00

1598 lines
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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 "lv_alloc.h"
#include "xlate.h"
#include <sys/stat.h>
#include <sys/wait.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;
}
dm_list_iterate_items(lvl, &vg->lvs) {
if (lvl->lv->status & SNAPSHOT)
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)) {
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 (!(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 ||
dm_list_empty(&failed_lvnames)) {
stack;
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)) {
free_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_free_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)
free_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 (!(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 = 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), NULL, 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_dummy.fmt = NULL;
pv = &pv_dummy;
}
ret = process_single_pv(cmd, NULL, pv, handle);
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);
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)) {
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++) {
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], NULL,
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) &&
!dm_list_size(&pv->fid->metadata_areas_ignored)) {
if (!scan_label_only &&
!scan_vgs_for_pvs(cmd, 1)) {
stack;
ret_max = ECMD_FAILED;
continue;
}
scanned = 1;
if (!(pv = pv_read(cmd, argv[opt],
NULL, 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);
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;
free_vg(vg);
stack;
continue;
}
ret = process_each_pv_in_vg(cmd, vg, &tags,
handle,
process_single_pv);
unlock_and_free_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");
if (!(pvslist = get_pvs(cmd)))
goto bad;
dm_list_iterate_items(pvl, pvslist) {
ret = process_single_pv(cmd, NULL, pvl->pv,
handle);
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 || (uint32_t) ul != ul)
return -1;
*result = ul;
return 0;
}
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_error("Physical volume %s not allocatable", pvname);
return 1;
}
if (allocatable_only && is_missing_pv(pvl->pv)) {
log_error("Physical volume %s is missing", pvname);
return 1;
}
if (allocatable_only &&
(pvl->pv->pe_count == pvl->pv->pe_alloc_count)) {
log_error("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++) {
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 = 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, 0) == SIGN_MINUS) {
log_error("Physical extent size may not be negative");
return 1;
}
if (arg_sign_value(cmd, maxlogicalvolumes_ARG, 0) == SIGN_MINUS) {
log_error("Max Logical Volumes may not be negative");
return 1;
}
if (arg_sign_value(cmd, maxphysicalvolumes_ARG, 0) == SIGN_MINUS) {
log_error("Max Physical Volumes may not be negative");
return 1;
}
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",
DEFAULT_VGMETADATACOPIES);
}
return 0;
}
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;
dm_list_iterate_items(lvl, &vg->lvs)
if (lv_is_visible(lvl->lv))
if (!lv_refresh(cmd, lvl->lv))
r = 0;
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 = 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 (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 = !strcmp(arg_str_value(cmd,
metadataignore_ARG,
DEFAULT_PVMETADATAIGNORE_STR),
"y");
} else {
pp->metadataignore = !strcmp(find_config_tree_str(cmd,
"metadata/pvmetadataignore",
DEFAULT_PVMETADATAIGNORE_STR),
"y");
}
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, 0) == 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 > ULONG_MAX) {
log_error("Physical volume data alignment is too big.");
return 0;
}
if (pp->data_alignment && pp->pe_start) {
if (pp->pe_start % pp->data_alignment)
log_warn("WARNING: Ignoring data alignment %" PRIu64
" incompatible with --restorefile value (%"
PRIu64").", pp->data_alignment, pp->pe_start);
pp->data_alignment = 0;
}
if (arg_sign_value(cmd, dataalignmentoffset_ARG, 0) == 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 > ULONG_MAX) {
log_error("Physical volume data alignment offset is too big.");
return 0;
}
if (pp->data_alignment_offset && pp->pe_start) {
log_warn("WARNING: Ignoring data alignment offset %" PRIu64
" incompatible with --restorefile value (%"
PRIu64").", pp->data_alignment_offset, pp->pe_start);
pp->data_alignment_offset = 0;
}
if (arg_sign_value(cmd, metadatasize_ARG, 0) == SIGN_MINUS) {
log_error("Metadata 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",
DEFAULT_PVMETADATASIZE);
pp->pvmetadatacopies = arg_int_value(cmd, pvmetadatacopies_ARG, -1);
if (pp->pvmetadatacopies < 0)
pp->pvmetadatacopies = find_config_tree_int(cmd,
"metadata/pvmetadatacopies",
DEFAULT_PVMETADATACOPIES);
return 1;
}
int get_activation_monitoring_mode(struct cmd_context *cmd,
struct volume_group *vg,
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",
DEFAULT_DMEVENTD_MONITOR))
*monitoring_mode = DMEVENTD_MONITOR_IGNORE;
if (vg && vg_is_clustered(vg) &&
*monitoring_mode == DMEVENTD_MONITOR_IGNORE) {
log_error("%s is incompatible with clustered Volume Group "
"\"%s\": Skipping.",
(arg_count(cmd, ignoremonitoring_ARG) ?
"--ignoremonitoring" : "activation/monitoring=0"),
vg->name);
return 0;
}
return 1;
}
/*
* 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("Ignoring stripesize argument with single stripe");
*stripe_size = 0;
}
if (*stripes > 1 && !*stripe_size) {
*stripe_size = find_config_tree_int(cmd, "metadata/stripesize", DEFAULT_STRIPESIZE) * 2;
log_print("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, 0) == SIGN_MINUS) {
log_error("Negative stripesize is invalid");
return 0;
}
if(*stripe_size > 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 if (!str_list_del(&pv->tags, tag)) {
log_error("Failed to remove tag %s from physical volume" "%s",
tag, pv_dev_name(pv));
return 0;
}
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;
}
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