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lvm2/tools/toollib.c

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/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*/
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#include "tools.h"
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#include <sys/stat.h>
int process_each_lv_in_vg(struct cmd_context *cmd, struct volume_group *vg,
int (*process_single) (struct cmd_context * cmd,
struct logical_volume * lv))
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{
int ret_max = 0;
int ret = 0;
struct list *lvh;
struct logical_volume *lv;
if (vg->status & EXPORTED_VG) {
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log_error("Volume group \"%s\" is exported", vg->name);
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return ECMD_FAILED;
}
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
ret = process_single(cmd, lv);
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if (ret > ret_max)
ret_max = ret;
}
return ret_max;
}
int process_each_lv(struct cmd_context *cmd, int argc, char **argv,
int (*process_single) (struct cmd_context * cmd,
struct logical_volume * lv))
{
int opt = 0;
int ret_max = 0;
int ret = 0;
int vg_count = 0;
struct list *vgh, *vgs;
struct volume_group *vg;
struct logical_volume *lv;
struct lv_list *lvl;
char *vg_name;
if (argc) {
log_verbose("Using logical volume(s) on command line");
for (; opt < argc; opt++) {
char *lv_name = argv[opt];
/* does VG exist? */
if (!(vg_name = extract_vgname(cmd->fid, lv_name))) {
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
continue;
}
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log_verbose("Finding volume group \"%s\"", vg_name);
if (!(vg = cmd->fid->ops->vg_read(cmd->fid, vg_name))) {
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log_error("Volume group \"%s\" doesn't exist",
vg_name);
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
continue;
}
if (vg->status & EXPORTED_VG) {
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log_error("Volume group \"%s\" is exported",
vg->name);
return ECMD_FAILED;
}
if (!(lvl = find_lv_in_vg(vg, lv_name))) {
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log_error("Can't find logical volume \"%s\" "
"in volume group \"%s\"",
lv_name, vg_name);
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
continue;
}
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lv = lvl->lv;
if ((ret = process_single(cmd, lv)) > ret_max)
ret_max = ret;
}
} else {
log_verbose("Finding all logical volumes");
if (!(vgs = cmd->fid->ops->get_vgs(cmd->fid))) {
log_error("No volume groups found");
return ECMD_FAILED;
}
list_iterate(vgh, vgs) {
vg_name = list_item(vgh, struct name_list)->name;
if (!(vg = cmd->fid->ops->vg_read(cmd->fid, vg_name))) {
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log_error("Volume group \"%s\" not found",
vg_name);
if (ret_max < ECMD_FAILED)
ret_max = ECMD_FAILED;
continue;
}
ret = process_each_lv_in_vg(cmd, vg, process_single);
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if (ret > ret_max)
ret_max = ret;
vg_count++;
}
}
return ret_max;
}
int process_each_vg(struct cmd_context *cmd, int argc, char **argv,
int lock_type,
int (*process_single) (struct cmd_context * cmd,
const char *vg_name))
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{
int opt = 0;
int ret_max = 0;
int ret = 0;
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struct list *vgh;
struct list *vgs;
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char *vg_name;
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if (argc) {
log_verbose("Using volume group(s) on command line");
for (; opt < argc; opt++) {
vg_name = argv[opt];
if (!lock_vol(cmd, (void *) vg_name, LCK_VG | lock_type)) {
log_error("Can't lock %s: skipping", vg_name);
continue;
}
if ((ret = process_single(cmd, vg_name)) > ret_max)
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ret_max = ret;
lock_vol(cmd, (void *) vg_name, LCK_VG | LCK_NONE);
}
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} else {
log_verbose("Finding all volume groups");
if (!(vgs = cmd->fid->ops->get_vgs(cmd->fid))) {
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log_error("No volume groups found");
return ECMD_FAILED;
}
list_iterate(vgh, vgs) {
vg_name = list_item(vgh, struct name_list)->name;
if (!lock_vol(cmd, (void *) vg_name, LCK_VG | lock_type)) {
log_error("Can't lock %s: skipping", vg_name);
continue;
}
ret = process_single(cmd, vg_name);
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if (ret > ret_max)
ret_max = ret;
lock_vol(cmd, (void *) vg_name, LCK_VG | LCK_NONE);
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}
}
return ret_max;
}
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int process_each_pv_in_vg(struct cmd_context *cmd, struct volume_group *vg,
int (*process_single) (struct cmd_context * cmd,
struct volume_group * vg,
struct physical_volume * pv))
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{
int ret_max = 0;
int ret = 0;
struct list *pvh;
struct physical_volume *pv;
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list_iterate(pvh, &vg->pvs) {
pv = list_item(pvh, struct pv_list)->pv;
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if ((ret = process_single(cmd, vg, pv)) > ret_max)
ret_max = ret;
}
return ret_max;
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}
int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
struct volume_group *vg,
int (*process_single) (struct cmd_context * cmd,
struct volume_group * vg,
struct physical_volume * pv))
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{
int opt = 0;
int ret_max = 0;
int ret = 0;
struct pv_list *pvl;
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if (argc) {
log_verbose("Using physical volume(s) on command line");
for (; opt < argc; opt++) {
if (!(pvl = find_pv_in_vg(vg, argv[opt]))) {
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log_error("Physical Volume \"%s\" not found in "
"Volume Group \"%s\"", argv[opt],
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vg->name);
continue;
}
ret = process_single(cmd, vg, pvl->pv);
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if (ret > ret_max)
ret_max = ret;
}
} else {
log_verbose("Using all physical volume(s) in volume group");
process_each_pv_in_vg(cmd, vg, process_single);
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}
return ret_max;
}
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int is_valid_chars(char *n)
{
register char c;
while ((c = *n++))
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if (!isalnum(c) && c != '.' && c != '_' && c != '-' && c != '+')
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return 0;
return 1;
}
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char *extract_vgname(struct format_instance *fi, char *lv_name)
{
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char *vg_name = lv_name;
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char *st;
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char *dev_dir = fi->cmd->dev_dir;
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/* Path supplied? */
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if (vg_name && strchr(vg_name, '/')) {
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/* Strip dev_dir (optional) */
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if (!strncmp(vg_name, dev_dir, strlen(dev_dir)))
vg_name += strlen(dev_dir);
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/* Require exactly one slash */
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/* FIXME But allow for consecutive slashes */
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if (!(st = strchr(vg_name, '/')) || (strchr(st + 1, '/'))) {
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log_error("\"%s\": Invalid path for Logical Volume",
lv_name);
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return 0;
}
vg_name = pool_strdup(fi->cmd->mem, vg_name);
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if (!vg_name) {
log_error("Allocation of vg_name failed");
return 0;
}
*strchr(vg_name, '/') = '\0';
return vg_name;
}
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if (!(vg_name = default_vgname(fi))) {
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if (lv_name)
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log_error("Path required for Logical Volume \"%s\"",
lv_name);
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return 0;
}
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return vg_name;
}
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char *default_vgname(struct format_instance *fi)
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{
char *vg_path;
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char *dev_dir = fi->cmd->dev_dir;
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/* Take default VG from environment? */
vg_path = getenv("LVM_VG_NAME");
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if (!vg_path)
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return 0;
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/* Strip dev_dir (optional) */
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if (!strncmp(vg_path, dev_dir, strlen(dev_dir)))
vg_path += strlen(dev_dir);
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if (strchr(vg_path, '/')) {
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log_error("Environment Volume Group in LVM_VG_NAME invalid: "
"\"%s\"", vg_path);
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return 0;
}
return pool_strdup(fi->cmd->mem, vg_path);
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}
struct list *create_pv_list(struct pool *mem,
struct volume_group *vg, int argc, char **argv)
{
struct list *r;
struct pv_list *pvl, *new_pvl;
int i;
/* Build up list of PVs */
if (!(r = pool_alloc(mem, sizeof(*r)))) {
log_error("Allocation of list failed");
return NULL;
}
list_init(r);
for (i = 0; i < argc; i++) {
if (!(pvl = find_pv_in_vg(vg, argv[i]))) {
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log_err("Physical Volume \"%s\" not found in "
"Volume Group \"%s\"", argv[i], vg->name);
return NULL;
}
if (pvl->pv->pe_count == pvl->pv->pe_allocated) {
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log_err("No free extents on physical volume \"%s\"",
argv[i]);
continue;
}
if (!(new_pvl = pool_alloc(mem, sizeof(*new_pvl)))) {
log_err("Unable to allocate physical volume list.");
return NULL;
}
memcpy(new_pvl, pvl, sizeof(*new_pvl));
list_add(r, &new_pvl->list);
}
return list_empty(r) ? NULL : r;
}