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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "lvm-string.h"
#include "metadata-exported.h"
#include <ctype.h>
#include <stdarg.h>
int emit_to_buffer(char **buffer, size_t *size, const char *fmt, ...)
{
int n;
va_list ap;
va_start(ap, fmt);
n = vsnprintf(*buffer, *size, fmt, ap);
va_end(ap);
/*
* Revert to old glibc behaviour (version <= 2.0.6) where snprintf
* returned -1 if buffer was too small. From glibc 2.1 it returns number
* of chars that would have been written had there been room.
*/
if (n < 0 || ((unsigned) n + 1 > *size))
n = -1;
if (n < 0 || ((size_t)n == *size))
return 0;
*buffer += n;
*size -= n;
return 1;
}
/*
* A-Za-z0-9._-+/=!:&#
*/
int validate_tag(const char *n)
{
register char c;
/* int len = 0; */
if (!n || !*n)
return 0;
/* FIXME: Is unlimited tag size support needed ? */
while ((/* len++, */ c = *n++))
if (!isalnum(c) && c != '.' && c != '_' && c != '-' && c != '+' && c != '/'
&& c != '=' && c != '!' && c != ':' && c != '&' && c != '#')
return 0;
return 1;
}
static name_error_t _validate_name(const char *n)
{
register char c;
register int len = 0;
if (!n || !*n)
return NAME_INVALID_EMPTY;
/* Hyphen used as VG-LV separator - ambiguity if LV starts with it */
if (*n == '-')
return NAME_INVALID_HYPEN;
if ((*n == '.') && (!n[1] || (n[1] == '.' && !n[2]))) /* ".", ".." */
return NAME_INVALID_DOTS;
while ((len++, c = *n++))
if (!isalnum(c) && c != '.' && c != '_' && c != '-' && c != '+')
return NAME_INVALID_CHARSET;
if (len > NAME_LEN)
return NAME_INVALID_LENGTH;
return NAME_VALID;
}
/*
* Device layer names are all of the form <vg>-<lv>-<layer>, any
* other hyphens that appear in these names are quoted with yet
* another hyphen. The top layer of any device has no layer
* name. eg, vg0-lvol0.
*/
int validate_name(const char *n)
{
return (_validate_name(n) == NAME_VALID) ? 1 : 0;
}
/*
* Copy valid characters from source to destination.
* Invalid characters are skipped. Copying is stopped
* when NAME_LEN characters have been copied.
*/
void copy_valid_chars(const char *src, char *dst)
{
const char *s = src;
char *d = dst;
int len = 0;
int i;
char c;
if (!s || !*s)
return;
for (i = 0; i < strlen(src); i++) {
c = *s;
if (!isalnum(c) && c != '.' && c != '_' && c != '-' && c != '+') {
s++;
continue;
}
*d = *s;
d++;
s++;
len++;
if (len == NAME_LEN)
break;
}
}
static const char *_lvname_has_reserved_prefix(const char *lvname)
{
static const char _prefixes[][12] = {
"pvmove",
"snapshot"
};
unsigned i;
for (i = 0; i < DM_ARRAY_SIZE(_prefixes); ++i)
if (!strncmp(lvname, _prefixes[i], strlen(_prefixes[i])))
return _prefixes[i];
return NULL;
}
static const char *_lvname_has_reserved_string(const char *lvname)
{
static const char _strings[][12] = {
"_cdata",
"_cmeta",
"_mimage",
"_mlog",
"_pmspare",
"_rimage",
"_rmeta",
"_tdata",
"_tmeta",
"_vorigin"
};
unsigned i;
for (i = 0; i < DM_ARRAY_SIZE(_strings); ++i)
if (strstr(lvname, _strings[i]))
return _strings[i];
return NULL;
}
int apply_lvname_restrictions(const char *name)
{
const char *s;
if ((s = _lvname_has_reserved_prefix(name))) {
log_error("Names starting \"%s\" are reserved. "
"Please choose a different LV name.", s);
return 0;
}
if ((s = _lvname_has_reserved_string(name))) {
log_error("Names including \"%s\" are reserved. "
"Please choose a different LV name.", s);
return 0;
}
return 1;
}
/*
* Validates name and returns an emunerated reason for name validataion failure.
*/
name_error_t validate_name_detailed(const char *name)
{
return _validate_name(name);
}
int is_reserved_lvname(const char *name)
{
return (_lvname_has_reserved_prefix(name) ||
_lvname_has_reserved_string(name)) ? 1 : 0;
}
char *build_dm_uuid(struct dm_pool *mem, const struct logical_volume *lv,
const char *layer)
{
const char *lvid = lv->lvid.s;
if (!layer) {
/*
* Mark internal LVs with layer suffix
* so tools like blkid may immeditelly see it's
* an internal LV they should not scan.
* Should also make internal detection simpler.
*/
/* Suffixes used here MUST match lib/activate/dev_manager.c */
layer = lv_is_cache_pool_data(lv) ? "cdata" :
lv_is_cache_pool_metadata(lv) ? "cmeta" :
// FIXME: dm-tree needs fixes for mirrors/raids
//lv_is_mirror_image(lv) ? "mimage" :
//lv_is_mirror_log(lv) ? "mlog" :
//lv_is_raid_image(lv) ? "rimage" :
//lv_is_raid_metadata(lv) ? "rmeta" :
lv_is_thin_pool(lv) ? "pool" :
lv_is_thin_pool_data(lv) ? "tdata" :
lv_is_thin_pool_metadata(lv) ? "tmeta" :
NULL;
}
return dm_build_dm_uuid(mem, UUID_PREFIX, lvid, layer);
}
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