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zfs label bootenv should store data as nvlist

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nvlist does allow us to support different data types and systems.

To encapsulate user data to/from nvlist, the libzfsbootenv library is
provided.

Reviewed-by: Arvind Sankar <nivedita@alum.mit.edu>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Signed-off-by: Toomas Soome <tsoome@me.com>
Closes #10774
This commit is contained in:
Toomas Soome 2020-09-16 01:42:27 +03:00 committed by GitHub
parent 37325e4749
commit 1db9e6e4e4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
29 changed files with 886 additions and 68 deletions
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2
configure.ac
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@ -161,6 +161,8 @@ AC_CONFIG_FILES([
lib/libuutil/Makefile
lib/libzfs/Makefile
lib/libzfs/libzfs.pc
lib/libzfsbootenv/Makefile
lib/libzfsbootenv/libzfsbootenv.pc
lib/libzfs_core/Makefile
lib/libzfs_core/libzfs_core.pc
lib/libzpool/Makefile

1
include/Makefile.am
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@ -15,6 +15,7 @@ USER_H = \
libuutil.h \
libuutil_impl.h \
libzfs.h \
libzfsbootenv.h \
libzfs_core.h \
libzfs_impl.h \
libzutil.h \

4
include/libzfs.h
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@ -892,8 +892,8 @@ extern int zpool_in_use(libzfs_handle_t *, int, pool_state_t *, char **,
* Label manipulation.
*/
extern int zpool_clear_label(int);
extern int zpool_set_bootenv(zpool_handle_t *, const char *);
extern int zpool_get_bootenv(zpool_handle_t *, char *, size_t, off_t);
extern int zpool_set_bootenv(zpool_handle_t *, const nvlist_t *);
extern int zpool_get_bootenv(zpool_handle_t *, nvlist_t **);
/*
* Management interfaces for SMB ACL files

2
include/libzfs_core.h
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@ -135,7 +135,7 @@ int lzc_wait(const char *, zpool_wait_activity_t, boolean_t *);
int lzc_wait_tag(const char *, zpool_wait_activity_t, uint64_t, boolean_t *);
int lzc_wait_fs(const char *, zfs_wait_activity_t, boolean_t *);
int lzc_set_bootenv(const char *, const char *);
int lzc_set_bootenv(const char *, const nvlist_t *);
int lzc_get_bootenv(const char *, nvlist_t **);
#ifdef __cplusplus
}

41
include/libzfsbootenv.h Normal file
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@ -0,0 +1,41 @@
/*
* 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>
*/
#ifndef _LIBZFSBOOTENV_H
#define _LIBZFSBOOTENV_H
#ifdef __cplusplus
extern "C" {
#endif
typedef enum lzbe_flags {
lzbe_add, /* add data to existing nvlist */
lzbe_replace /* replace current nvlist */
} lzbe_flags_t;
extern int lzbe_nvlist_get(const char *, const char *, void **);
extern int lzbe_nvlist_set(const char *, const char *, void *);
extern void lzbe_nvlist_free(void *);
extern int lzbe_add_pair(void *, const char *, const char *, void *, size_t);
extern int lzbe_remove_pair(void *, const char *);
extern int lzbe_set_boot_device(const char *, lzbe_flags_t, const char *);
extern int lzbe_get_boot_device(const char *, char **);
extern int lzbe_bootenv_print(const char *, const char *, FILE *);
#ifdef __cplusplus
}
#endif
#endif /* _LIBZFSBOOTENV_H */

1
include/os/freebsd/zfs/sys/Makefile.am
View File

@ -2,6 +2,7 @@ KERNEL_H = \
freebsd_crypto.h \
sha2.h \
vdev_os.h \
zfs_bootenv_os.h \
zfs_context_os.h \
zfs_ctldir.h \
zfs_dir.h \

29
include/os/freebsd/zfs/sys/zfs_bootenv_os.h Normal file
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@ -0,0 +1,29 @@
/*
* 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>
*/
#ifndef _ZFS_BOOTENV_OS_H
#define _ZFS_BOOTENV_OS_H
#ifdef __cplusplus
extern "C" {
#endif
#define BOOTENV_OS BE_FREEBSD_VENDOR
#ifdef __cplusplus
}
#endif
#endif /* _ZFS_BOOTENV_OS_H */

1
include/os/linux/zfs/sys/Makefile.am
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@ -16,6 +16,7 @@ KERNEL_H = \
trace_zil.h \
trace_zio.h \
trace_zrlock.h \
zfs_bootenv_os.h \
zfs_context_os.h \
zfs_ctldir.h \
zfs_dir.h \

29
include/os/linux/zfs/sys/zfs_bootenv_os.h Normal file
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@ -0,0 +1,29 @@
/*
* 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>
*/
#ifndef _ZFS_BOOTENV_OS_H
#define _ZFS_BOOTENV_OS_H
#ifdef __cplusplus
extern "C" {
#endif
#define BOOTENV_OS BE_LINUX_VENDOR
#ifdef __cplusplus
}
#endif
#endif /* _ZFS_BOOTENV_OS_H */

1
include/sys/Makefile.am
View File

@ -102,6 +102,7 @@ COMMON_H = \
zcp_set.h \
zfeature.h \
zfs_acl.h \
zfs_bootenv.h \
zfs_context.h \
zfs_debug.h \
zfs_delay.h \

4
include/sys/fs/zfs.h
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@ -1336,8 +1336,8 @@ typedef enum zfs_ioc {
ZFS_IOC_NEXTBOOT, /* 0x84 (FreeBSD) */
ZFS_IOC_JAIL, /* 0x85 (FreeBSD) */
ZFS_IOC_UNJAIL, /* 0x86 (FreeBSD) */
ZFS_IOC_SET_BOOTENV, /* 0x87 (Linux) */
ZFS_IOC_GET_BOOTENV, /* 0x88 (Linux) */
ZFS_IOC_SET_BOOTENV, /* 0x87 */
ZFS_IOC_GET_BOOTENV, /* 0x88 */
ZFS_IOC_LAST
} zfs_ioc_t;

2
include/sys/vdev.h
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@ -181,7 +181,7 @@ extern void vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv);
extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
offset, uint64_t size, zio_done_func_t *done, void *priv, int flags);
extern int vdev_label_read_bootenv(vdev_t *, nvlist_t *);
extern int vdev_label_write_bootenv(vdev_t *, char *);
extern int vdev_label_write_bootenv(vdev_t *, nvlist_t *);
typedef enum {
VDEV_LABEL_CREATE, /* create/add a new device */

11
include/sys/vdev_impl.h
View File

@ -476,7 +476,16 @@ typedef struct vdev_phys {
} vdev_phys_t;
typedef enum vbe_vers {
/* The bootenv file is stored as ascii text in the envblock */
/*
* The bootenv file is stored as ascii text in the envblock.
* It is used by the GRUB bootloader used on Linux to store the
* contents of the grubenv file. The file is stored as raw ASCII,
* and is protected by an embedded checksum. By default, GRUB will
* check if the boot filesystem supports storing the environment data
* in a special location, and if so, will invoke filesystem specific
* logic to retrieve it. This can be overriden by a variable, should
* the user so desire.
*/
VB_RAW = 0,
/*

53
include/sys/zfs_bootenv.h Normal file
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@ -0,0 +1,53 @@
/*
* 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>
*/
#ifndef _ZFS_BOOTENV_H
#define _ZFS_BOOTENV_H
/*
* Define macros for label bootenv nvlist pair keys.
*/
#ifdef __cplusplus
extern "C" {
#endif
#define BOOTENV_VERSION "version"
#define BE_ILLUMOS_VENDOR "illumos"
#define BE_FREEBSD_VENDOR "freebsd"
#define BE_GRUB_VENDOR "grub"
#define BE_LINUX_VENDOR "linux"
#include <sys/zfs_bootenv_os.h>
#define GRUB_ENVMAP BE_GRUB_VENDOR ":" "envmap"
#define FREEBSD_BOOTONCE BE_FREEBSD_VENDOR ":" "bootonce"
#define FREEBSD_BOOTONCE_USED BE_FREEBSD_VENDOR ":" "bootonce-used"
#define FREEBSD_NVSTORE BE_FREEBSD_VENDOR ":" "nvstore"
#define ILLUMOS_BOOTONCE BE_ILLUMOS_VENDOR ":" "bootonce"
#define ILLUMOS_BOOTONCE_USED BE_ILLUMOS_VENDOR ":" "bootonce-used"
#define ILLUMOS_NVSTORE BE_ILLUMOS_VENDOR ":" "nvstore"
#define OS_BOOTONCE BOOTENV_OS ":" "bootonce"
#define OS_BOOTONCE_USED BOOTENV_OS ":" "bootonce-used"
#define OS_NVSTORE BOOTENV_OS ":" "nvstore"
#ifdef __cplusplus
}
#endif
#endif /* _ZFS_BOOTENV_H */

4
lib/Makefile.am
View File

@ -13,6 +13,6 @@ SUBDIRS += libnvpair
# libzutil depends on libefi if present
SUBDIRS += libzutil libunicode
# These four libraries, which are installed as the final build product,
# These five libraries, which are installed as the final build product,
# incorporate the eight convenience libraries given above.
SUBDIRS += libuutil libzfs_core libzfs libzpool
SUBDIRS += libuutil libzfs_core libzfs libzpool libzfsbootenv

24
lib/libzfs/libzfs_pool.c
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@ -4495,7 +4495,7 @@ zpool_wait_status(zpool_handle_t *zhp, zpool_wait_activity_t activity,
}
int
zpool_set_bootenv(zpool_handle_t *zhp, const char *envmap)
zpool_set_bootenv(zpool_handle_t *zhp, const nvlist_t *envmap)
{
int error = lzc_set_bootenv(zhp->zpool_name, envmap);
if (error != 0) {
@ -4508,24 +4508,20 @@ zpool_set_bootenv(zpool_handle_t *zhp, const char *envmap)
}
int
zpool_get_bootenv(zpool_handle_t *zhp, char *outbuf, size_t size, off_t offset)
zpool_get_bootenv(zpool_handle_t *zhp, nvlist_t **nvlp)
{
nvlist_t *nvl = NULL;
int error = lzc_get_bootenv(zhp->zpool_name, &nvl);
nvlist_t *nvl;
int error;
nvl = NULL;
error = lzc_get_bootenv(zhp->zpool_name, &nvl);
if (error != 0) {
(void) zpool_standard_error_fmt(zhp->zpool_hdl, error,
dgettext(TEXT_DOMAIN,
"error getting bootenv in pool '%s'"), zhp->zpool_name);
return (-1);
}
char *envmap = fnvlist_lookup_string(nvl, "envmap");
if (offset >= strlen(envmap)) {
fnvlist_free(nvl);
return (0);
} else {
*nvlp = nvl;
}
strncpy(outbuf, envmap + offset, size);
int bytes = MIN(strlen(envmap + offset), size);
fnvlist_free(nvl);
return (bytes);
return (error);
}

8
lib/libzfs_core/libzfs_core.c
View File

@ -1625,13 +1625,9 @@ lzc_wait_fs(const char *fs, zfs_wait_activity_t activity, boolean_t *waited)
* Set the bootenv contents for the given pool.
*/
int
lzc_set_bootenv(const char *pool, const char *env)
lzc_set_bootenv(const char *pool, const nvlist_t *env)
{
nvlist_t *args = fnvlist_alloc();
fnvlist_add_string(args, "envmap", env);
int error = lzc_ioctl(ZFS_IOC_SET_BOOTENV, pool, args, NULL);
fnvlist_free(args);
return (error);
return (lzc_ioctl(ZFS_IOC_SET_BOOTENV, pool, (nvlist_t *)env, NULL));
}
/*

1
lib/libzfsbootenv/.gitignore vendored Normal file
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@ -0,0 +1 @@
/libzfsbootenv.pc

32
lib/libzfsbootenv/Makefile.am Normal file
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@ -0,0 +1,32 @@
include $(top_srcdir)/config/Rules.am
pkgconfig_DATA = libzfsbootenv.pc
lib_LTLIBRARIES = libzfsbootenv.la
if BUILD_FREEBSD
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/freebsd/zfs
endif
if BUILD_LINUX
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/linux/zfs
endif
USER_C = \
lzbe_device.c \
lzbe_pair.c \
lzbe_util.c
dist_libzfsbootenv_la_SOURCES = \
$(USER_C)
libzfsbootenv_la_LIBADD = \
$(abs_top_builddir)/lib/libzfs/libzfs.la \
$(abs_top_builddir)/lib/libnvpair/libnvpair.la
libzfsbootenv_la_LDFLAGS =
if !ASAN_ENABLED
libzfsbootenv_la_LDFLAGS += -Wl,-z,defs
endif
libzfsbootenv_la_LDFLAGS += -version-info 1:0:0

12
lib/libzfsbootenv/libzfsbootenv.pc.in Normal file
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@ -0,0 +1,12 @@
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: libzfsbootenv
Description: LibZFSBootENV library
Version: @VERSION@
URL: https://zfsonlinux.org
Requires: libzfs libnvpair
Cflags: -I${includedir}
Libs: -L${libdir} -lzfsbootenv

164
lib/libzfsbootenv/lzbe_device.c Normal file
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@ -0,0 +1,164 @@
/*
* 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>
/*
* Store device name to zpool label bootenv area.
* This call will set bootenv version to VB_NVLIST, if bootenv currently
* does contain other version, then old data will be replaced.
*/
int
lzbe_set_boot_device(const char *pool, lzbe_flags_t flag, const char *device)
{
libzfs_handle_t *hdl;
zpool_handle_t *zphdl;
nvlist_t *nv;
char *descriptor;
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);
}
switch (flag) {
case lzbe_add:
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)
break;
/* Drop this nvlist */
fnvlist_free(nv);
}
/* FALLTHROUGH */
case lzbe_replace:
nv = fnvlist_alloc();
break;
default:
return (rv);
}
/* version is mandatory */
fnvlist_add_uint64(nv, BOOTENV_VERSION, VB_NVLIST);
/*
* If device name is empty, remove boot device configuration.
*/
if ((device == NULL || *device == '\0')) {
if (nvlist_exists(nv, OS_BOOTONCE))
fnvlist_remove(nv, OS_BOOTONCE);
} else {
/*
* Use device name directly if it does start with
* prefix "zfs:". Otherwise, add prefix and sufix.
*/
if (strncmp(device, "zfs:", 4) == 0) {
fnvlist_add_string(nv, OS_BOOTONCE, device);
} else {
descriptor = NULL;
if (asprintf(&descriptor, "zfs:%s:", device) > 0)
fnvlist_add_string(nv, OS_BOOTONCE, descriptor);
else
rv = ENOMEM;
free(descriptor);
}
}
rv = zpool_set_bootenv(zphdl, nv);
if (rv != 0)
fprintf(stderr, "%s\n", libzfs_error_description(hdl));
fnvlist_free(nv);
zpool_close(zphdl);
libzfs_fini(hdl);
return (rv);
}
/*
* Return boot device name from bootenv, if set.
*/
int
lzbe_get_boot_device(const char *pool, char **device)
{
libzfs_handle_t *hdl;
zpool_handle_t *zphdl;
nvlist_t *nv;
char *val;
int rv = -1;
if (pool == NULL || *pool == '\0' || device == NULL)
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) {
rv = nvlist_lookup_string(nv, OS_BOOTONCE, &val);
if (rv == 0) {
/*
* zfs device descriptor is in form of "zfs:dataset:",
* we only do need dataset name.
*/
if (strncmp(val, "zfs:", 4) == 0) {
val += 4;
val = strdup(val);
if (val != NULL) {
size_t len = strlen(val);
if (val[len - 1] == ':')
val[len - 1] = '\0';
*device = val;
} else {
rv = ENOMEM;
}
} else {
rv = EINVAL;
}
}
nvlist_free(nv);
}
zpool_close(zphdl);
libzfs_fini(hdl);
return (rv);
}

329
lib/libzfsbootenv/lzbe_pair.c Normal file
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@ -0,0 +1,329 @@
/*
* 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>
/*
* 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;
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) {
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, 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));
}

39
lib/libzfsbootenv/lzbe_util.c Normal file
View File

@ -0,0 +1,39 @@
/*
* 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>
/*
* Output bootenv information.
*/
int
lzbe_bootenv_print(const char *pool, const char *nvlist, FILE *of)
{
nvlist_t *nv;
int rv = -1;
if (pool == NULL || *pool == '\0' || of == NULL)
return (rv);
rv = lzbe_nvlist_get(pool, nvlist, (void **)&nv);
if (rv == 0) {
nvlist_print(of, nv);
nvlist_free(nv);
}
return (rv);
}

7
lib/libzpool/Makefile.am
View File

@ -7,6 +7,13 @@ VPATH = \
$(top_srcdir)/module/os/linux/zfs \
$(top_srcdir)/lib/libzpool
if BUILD_FREEBSD
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/freebsd/zfs
endif
if BUILD_LINUX
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/linux/zfs
endif
# Unconditionally enable debugging for libzpool
AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG

116
module/zfs/vdev_label.c
View File

@ -149,6 +149,8 @@
#include <sys/dsl_scan.h>
#include <sys/abd.h>
#include <sys/fs/zfs.h>
#include <sys/byteorder.h>
#include <sys/zfs_bootenv.h>
/*
* Basic routines to read and write from a vdev label.
@ -1233,13 +1235,9 @@ vdev_label_read_bootenv_impl(zio_t *zio, vdev_t *vd, int flags)
* bootloader should have rewritten them all to be the same on boot,
* and any changes we made since boot have been the same across all
* labels.
*
* While grub supports writing to all four labels, other bootloaders
* don't, so we only use the first two labels to store boot
* information.
*/
if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) {
for (int l = 0; l < VDEV_LABELS / 2; l++) {
for (int l = 0; l < VDEV_LABELS; l++) {
vdev_label_read(zio, vd, l,
abd_alloc_linear(VDEV_PAD_SIZE, B_FALSE),
offsetof(vdev_label_t, vl_be), VDEV_PAD_SIZE,
@ -1249,14 +1247,15 @@ vdev_label_read_bootenv_impl(zio_t *zio, vdev_t *vd, int flags)
}
int
vdev_label_read_bootenv(vdev_t *rvd, nvlist_t *command)
vdev_label_read_bootenv(vdev_t *rvd, nvlist_t *bootenv)
{
nvlist_t *config;
spa_t *spa = rvd->vdev_spa;
abd_t *abd = NULL;
int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL |
ZIO_FLAG_SPECULATIVE | ZIO_FLAG_TRYHARD;
ASSERT(command);
ASSERT(bootenv);
ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
zio_t *zio = zio_root(spa, NULL, &abd, flags);
@ -1264,39 +1263,81 @@ vdev_label_read_bootenv(vdev_t *rvd, nvlist_t *command)
int err = zio_wait(zio);
if (abd != NULL) {
char *buf;
vdev_boot_envblock_t *vbe = abd_to_buf(abd);
if (vbe->vbe_version != VB_RAW) {
abd_free(abd);
return (SET_ERROR(ENOTSUP));
vbe->vbe_version = ntohll(vbe->vbe_version);
switch (vbe->vbe_version) {
case VB_RAW:
/*
* if we have textual data in vbe_bootenv, create nvlist
* with key "envmap".
*/
fnvlist_add_uint64(bootenv, BOOTENV_VERSION, VB_RAW);
vbe->vbe_bootenv[sizeof (vbe->vbe_bootenv) - 1] = '\0';
fnvlist_add_string(bootenv, GRUB_ENVMAP,
vbe->vbe_bootenv);
break;
case VB_NVLIST:
err = nvlist_unpack(vbe->vbe_bootenv,
sizeof (vbe->vbe_bootenv), &config, 0);
if (err == 0) {
fnvlist_merge(bootenv, config);
nvlist_free(config);
break;
}
/* FALLTHROUGH */
default:
/* Check for FreeBSD zfs bootonce command string */
buf = abd_to_buf(abd);
if (*buf == '\0') {
fnvlist_add_uint64(bootenv, BOOTENV_VERSION,
VB_NVLIST);
break;
}
fnvlist_add_string(bootenv, FREEBSD_BOOTONCE, buf);
}
vbe->vbe_bootenv[sizeof (vbe->vbe_bootenv) - 1] = '\0';
fnvlist_add_string(command, "envmap", vbe->vbe_bootenv);
/* abd was allocated in vdev_label_read_bootenv_impl() */
/*
* abd was allocated in vdev_label_read_bootenv_impl()
*/
abd_free(abd);
/* If we managed to read any successfully, return success. */
/*
* If we managed to read any successfully,
* return success.
*/
return (0);
}
return (err);
}
int
vdev_label_write_bootenv(vdev_t *vd, char *envmap)
vdev_label_write_bootenv(vdev_t *vd, nvlist_t *env)
{
zio_t *zio;
spa_t *spa = vd->vdev_spa;
vdev_boot_envblock_t *bootenv;
int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
int error = ENXIO;
int error;
size_t nvsize;
char *nvbuf;
if (strlen(envmap) >= sizeof (bootenv->vbe_bootenv)) {
error = nvlist_size(env, &nvsize, NV_ENCODE_XDR);
if (error != 0)
return (SET_ERROR(error));
if (nvsize >= sizeof (bootenv->vbe_bootenv)) {
return (SET_ERROR(E2BIG));
}
ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
error = ENXIO;
for (int c = 0; c < vd->vdev_children; c++) {
int child_err = vdev_label_write_bootenv(vd->vdev_child[c],
envmap);
int child_err;
child_err = vdev_label_write_bootenv(vd->vdev_child[c], env);
/*
* As long as any of the disks managed to write all of their
* labels successfully, return success.
@ -1312,16 +1353,41 @@ vdev_label_write_bootenv(vdev_t *vd, char *envmap)
ASSERT3U(sizeof (*bootenv), ==, VDEV_PAD_SIZE);
abd_t *abd = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE);
abd_zero(abd, VDEV_PAD_SIZE);
bootenv = abd_borrow_buf_copy(abd, VDEV_PAD_SIZE);
char *buf = bootenv->vbe_bootenv;
(void) strlcpy(buf, envmap, sizeof (bootenv->vbe_bootenv));
bootenv->vbe_version = VB_RAW;
abd_return_buf_copy(abd, bootenv, VDEV_PAD_SIZE);
bootenv = abd_borrow_buf_copy(abd, VDEV_PAD_SIZE);
nvbuf = bootenv->vbe_bootenv;
nvsize = sizeof (bootenv->vbe_bootenv);
bootenv->vbe_version = fnvlist_lookup_uint64(env, BOOTENV_VERSION);
switch (bootenv->vbe_version) {
case VB_RAW:
if (nvlist_lookup_string(env, GRUB_ENVMAP, &nvbuf) == 0) {
(void) strlcpy(bootenv->vbe_bootenv, nvbuf, nvsize);
}
error = 0;
break;
case VB_NVLIST:
error = nvlist_pack(env, &nvbuf, &nvsize, NV_ENCODE_XDR,
KM_SLEEP);
break;
default:
error = EINVAL;
break;
}
if (error == 0) {
bootenv->vbe_version = htonll(bootenv->vbe_version);
abd_return_buf_copy(abd, bootenv, VDEV_PAD_SIZE);
} else {
abd_free(abd);
return (SET_ERROR(error));
}
retry:
zio = zio_root(spa, NULL, NULL, flags);
for (int l = 0; l < VDEV_LABELS / 2; l++) {
for (int l = 0; l < VDEV_LABELS; l++) {
vdev_label_write(zio, vd, l, abd,
offsetof(vdev_label_t, vl_be),
VDEV_PAD_SIZE, NULL, NULL, flags);

22
module/zfs/zfs_ioctl.c
View File

@ -3511,30 +3511,29 @@ zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
/*
* This ioctl is used to set the bootenv configuration on the current
* pool. This configuration is stored in the second padding area of the label,
* and it is used by the GRUB bootloader used on Linux to store the contents
* of the grubenv file. The file is stored as raw ASCII, and is protected by
* an embedded checksum. By default, GRUB will check if the boot filesystem
* supports storing the environment data in a special location, and if so,
* will invoke filesystem specific logic to retrieve it. This can be overridden
* by a variable, should the user so desire.
* and it is used by the bootloader(s) to store the bootloader and/or system
* specific data.
* The data is stored as nvlist data stream, and is protected by
* an embedded checksum.
* The version can have two possible values:
* VB_RAW: nvlist should have key GRUB_ENVMAP, value DATA_TYPE_STRING.
* VB_NVLIST: nvlist with arbitrary <key, value> pairs.
*/
/* ARGSUSED */
static const zfs_ioc_key_t zfs_keys_set_bootenv[] = {
{"envmap", DATA_TYPE_STRING, 0},
{"version", DATA_TYPE_UINT64, 0},
{"<keys>", DATA_TYPE_ANY, ZK_OPTIONAL | ZK_WILDCARDLIST},
};
static int
zfs_ioc_set_bootenv(const char *name, nvlist_t *innvl, nvlist_t *outnvl)
{
char *envmap;
int error;
spa_t *spa;
envmap = fnvlist_lookup_string(innvl, "envmap");
if ((error = spa_open(name, &spa, FTAG)) != 0)
return (error);
spa_vdev_state_enter(spa, SCL_ALL);
error = vdev_label_write_bootenv(spa->spa_root_vdev, envmap);
error = vdev_label_write_bootenv(spa->spa_root_vdev, innvl);
(void) spa_vdev_state_exit(spa, NULL, 0);
spa_close(spa, FTAG);
return (error);
@ -3544,7 +3543,6 @@ static const zfs_ioc_key_t zfs_keys_get_bootenv[] = {
/* no nvl keys */
};
/* ARGSUSED */
static int
zfs_ioc_get_bootenv(const char *name, nvlist_t *innvl, nvlist_t *outnvl)
{

1
rpm/generic/zfs.spec.in
View File

@ -491,6 +491,7 @@ systemctl --system daemon-reload >/dev/null || true
%files -n libzfs2-devel
%{_pkgconfigdir}/libzfs.pc
%{_pkgconfigdir}/libzfsbootenv.pc
%{_pkgconfigdir}/libzfs_core.pc
%{_libdir}/*.so
%{_includedir}/*

7
tests/zfs-tests/cmd/libzfs_input_check/Makefile.am
View File

@ -4,6 +4,13 @@ pkgexecdir = $(datadir)/@PACKAGE@/zfs-tests/bin
pkgexec_PROGRAMS = libzfs_input_check
if BUILD_FREEBSD
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/freebsd/zfs
endif
if BUILD_LINUX
DEFAULT_INCLUDES += -I$(top_srcdir)/include/os/linux/zfs
endif
libzfs_input_check_SOURCES = libzfs_input_check.c
libzfs_input_check_LDADD = \
$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la \

7
tests/zfs-tests/cmd/libzfs_input_check/libzfs_input_check.c
View File

@ -25,7 +25,9 @@
#include <libzutil.h>
#include <sys/nvpair.h>
#include <sys/vdev_impl.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_bootenv.h>
/*
* Test the nvpair inputs for the non-legacy zfs ioctl commands.
@ -762,9 +764,10 @@ test_set_bootenv(const char *pool)
{
nvlist_t *required = fnvlist_alloc();
fnvlist_add_string(required, "envmap", "test");
fnvlist_add_uint64(required, "version", VB_RAW);
fnvlist_add_string(required, GRUB_ENVMAP, "test");
IOC_INPUT_TEST(ZFS_IOC_SET_BOOTENV, pool, required, NULL, 0);
IOC_INPUT_TEST_WILD(ZFS_IOC_SET_BOOTENV, pool, required, NULL, 0);
nvlist_free(required);
}