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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2020 Toomas Soome <tsoome@me.com>
*/
#include <sys/types.h>
#include <string.h>
#include <libzfs.h>
#include <libzfsbootenv.h>
#include <sys/zfs_bootenv.h>
#include <sys/vdev_impl.h>
/*
* Get or create nvlist. If key is not NULL, get nvlist from bootenv,
* otherwise return bootenv.
*/
int
lzbe_nvlist_get(const char *pool, const char *key, void **ptr)
{
libzfs_handle_t *hdl;
zpool_handle_t *zphdl;
nvlist_t *nv;
int rv = -1;
if (pool == NULL || *pool == '\0')
return (rv);
if ((hdl = libzfs_init()) == NULL) {
return (rv);
}
zphdl = zpool_open(hdl, pool);
if (zphdl == NULL) {
libzfs_fini(hdl);
return (rv);
}
rv = zpool_get_bootenv(zphdl, &nv);
if (rv == 0) {
nvlist_t *nvl, *dup;
if (key != NULL) {
rv = nvlist_lookup_nvlist(nv, key, &nvl);
if (rv == 0) {
rv = nvlist_dup(nvl, &dup, 0);
nvlist_free(nv);
if (rv == 0)
nv = dup;
else
nv = NULL;
} else {
nvlist_free(nv);
rv = nvlist_alloc(&nv, NV_UNIQUE_NAME, 0);
}
}
*ptr = nv;
}
zpool_close(zphdl);
libzfs_fini(hdl);
return (rv);
}
int
lzbe_nvlist_set(const char *pool, const char *key, void *ptr)
{
libzfs_handle_t *hdl;
zpool_handle_t *zphdl;
nvlist_t *nv;
uint64_t version;
int rv = -1;
if (pool == NULL || *pool == '\0')
return (rv);
if ((hdl = libzfs_init()) == NULL) {
return (rv);
}
zphdl = zpool_open(hdl, pool);
if (zphdl == NULL) {
libzfs_fini(hdl);
return (rv);
}
if (key != NULL) {
rv = zpool_get_bootenv(zphdl, &nv);
if (rv == 0) {
/*
* We got the nvlist, check for version.
* if version is missing or is not VB_NVLIST,
* create new list.
*/
rv = nvlist_lookup_uint64(nv, BOOTENV_VERSION,
&version);
if (rv != 0 || version != VB_NVLIST) {
/* Drop this nvlist */
fnvlist_free(nv);
/* Create and prepare new nvlist */
nv = fnvlist_alloc();
fnvlist_add_uint64(nv, BOOTENV_VERSION,
VB_NVLIST);
}
rv = nvlist_add_nvlist(nv, key, ptr);
if (rv == 0)
rv = zpool_set_bootenv(zphdl, nv);
nvlist_free(nv);
}
} else {
rv = zpool_set_bootenv(zphdl, ptr);
}
zpool_close(zphdl);
libzfs_fini(hdl);
return (rv);
}
/*
* free nvlist we got via lzbe_nvlist_get()
*/
void
lzbe_nvlist_free(void *ptr)
{
nvlist_free(ptr);
}
static const char *typenames[] = {
"DATA_TYPE_UNKNOWN",
"DATA_TYPE_BOOLEAN",
"DATA_TYPE_BYTE",
"DATA_TYPE_INT16",
"DATA_TYPE_UINT16",
"DATA_TYPE_INT32",
"DATA_TYPE_UINT32",
"DATA_TYPE_INT64",
"DATA_TYPE_UINT64",
"DATA_TYPE_STRING",
"DATA_TYPE_BYTE_ARRAY",
"DATA_TYPE_INT16_ARRAY",
"DATA_TYPE_UINT16_ARRAY",
"DATA_TYPE_INT32_ARRAY",
"DATA_TYPE_UINT32_ARRAY",
"DATA_TYPE_INT64_ARRAY",
"DATA_TYPE_UINT64_ARRAY",
"DATA_TYPE_STRING_ARRAY",
"DATA_TYPE_HRTIME",
"DATA_TYPE_NVLIST",
"DATA_TYPE_NVLIST_ARRAY",
"DATA_TYPE_BOOLEAN_VALUE",
"DATA_TYPE_INT8",
"DATA_TYPE_UINT8",
"DATA_TYPE_BOOLEAN_ARRAY",
"DATA_TYPE_INT8_ARRAY",
"DATA_TYPE_UINT8_ARRAY"
};
static int
nvpair_type_from_name(const char *name)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(typenames); i++) {
if (strcmp(name, typenames[i]) == 0)
return (i);
}
return (0);
}
/*
* Add pair defined by key, type and value into nvlist.
*/
int
lzbe_add_pair(void *ptr, const char *key, const char *type, void *value,
size_t size)
{
nvlist_t *nv = ptr;
data_type_t dt;
int rv = 0;
if (ptr == NULL || key == NULL || value == NULL)
return (rv);
if (type == NULL)
type = "DATA_TYPE_STRING";
dt = nvpair_type_from_name(type);
if (dt == DATA_TYPE_UNKNOWN)
return (EINVAL);
switch (dt) {
case DATA_TYPE_BYTE:
if (size != sizeof (uint8_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_byte(nv, key, *(uint8_t *)value);
break;
case DATA_TYPE_INT16:
if (size != sizeof (int16_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_int16(nv, key, *(int16_t *)value);
break;
case DATA_TYPE_UINT16:
if (size != sizeof (uint16_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_uint16(nv, key, *(uint16_t *)value);
break;
case DATA_TYPE_INT32:
if (size != sizeof (int32_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_int32(nv, key, *(int32_t *)value);
break;
case DATA_TYPE_UINT32:
if (size != sizeof (uint32_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_uint32(nv, key, *(uint32_t *)value);
break;
case DATA_TYPE_INT64:
if (size != sizeof (int64_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_int64(nv, key, *(int64_t *)value);
break;
case DATA_TYPE_UINT64:
if (size != sizeof (uint64_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_uint64(nv, key, *(uint64_t *)value);
break;
case DATA_TYPE_STRING:
rv = nvlist_add_string(nv, key, value);
break;
case DATA_TYPE_BYTE_ARRAY:
rv = nvlist_add_byte_array(nv, key, value, size);
break;
case DATA_TYPE_INT16_ARRAY:
rv = nvlist_add_int16_array(nv, key, value, size);
break;
case DATA_TYPE_UINT16_ARRAY:
rv = nvlist_add_uint16_array(nv, key, value, size);
break;
case DATA_TYPE_INT32_ARRAY:
rv = nvlist_add_int32_array(nv, key, value, size);
break;
case DATA_TYPE_UINT32_ARRAY:
rv = nvlist_add_uint32_array(nv, key, value, size);
break;
case DATA_TYPE_INT64_ARRAY:
rv = nvlist_add_int64_array(nv, key, value, size);
break;
case DATA_TYPE_UINT64_ARRAY:
rv = nvlist_add_uint64_array(nv, key, value, size);
break;
case DATA_TYPE_STRING_ARRAY:
rv = nvlist_add_string_array(nv, key, value, size);
break;
case DATA_TYPE_NVLIST:
rv = nvlist_add_nvlist(nv, key, (nvlist_t *)value);
break;
case DATA_TYPE_NVLIST_ARRAY:
rv = nvlist_add_nvlist_array(nv, key, (const nvlist_t **)value,
size);
break;
case DATA_TYPE_BOOLEAN_VALUE:
if (size != sizeof (boolean_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_boolean_value(nv, key, *(boolean_t *)value);
break;
case DATA_TYPE_INT8:
if (size != sizeof (int8_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_int8(nv, key, *(int8_t *)value);
break;
case DATA_TYPE_UINT8:
if (size != sizeof (uint8_t)) {
rv = EINVAL;
break;
}
rv = nvlist_add_uint8(nv, key, *(uint8_t *)value);
break;
case DATA_TYPE_BOOLEAN_ARRAY:
rv = nvlist_add_boolean_array(nv, key, value, size);
break;
case DATA_TYPE_INT8_ARRAY:
rv = nvlist_add_int8_array(nv, key, value, size);
break;
case DATA_TYPE_UINT8_ARRAY:
rv = nvlist_add_uint8_array(nv, key, value, size);
break;
default:
return (ENOTSUP);
}
return (rv);
}
int
lzbe_remove_pair(void *ptr, const char *key)
{
return (nvlist_remove_all(ptr, key));
}
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