*/
/*
- * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright (c) 2013, Joyent, Inc. All rights reserved.
* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2017, Intel Corporation.
*/
-#ifdef _KERNEL
-#include <sys/systm.h>
-#else
+#ifndef _KERNEL
#include <errno.h>
#include <string.h>
+#include <sys/stat.h>
#endif
#include <sys/debug.h>
#include <sys/fs/zfs.h>
#include <sys/inttypes.h>
#include <sys/types.h>
+#include <sys/zfs_sysfs.h>
#include "zfeature_common.h"
/*
return (B_FALSE);
}
+int
+zfeature_lookup_guid(const char *guid, spa_feature_t *res)
+{
+ for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
+ zfeature_info_t *feature = &spa_feature_table[i];
+ if (!feature->fi_zfs_mod_supported)
+ continue;
+ if (strcmp(guid, feature->fi_guid) == 0) {
+ if (res != NULL)
+ *res = i;
+ return (0);
+ }
+ }
+
+ return (ENOENT);
+}
+
int
zfeature_lookup_name(const char *name, spa_feature_t *res)
{
for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *feature = &spa_feature_table[i];
+ if (!feature->fi_zfs_mod_supported)
+ continue;
if (strcmp(name, feature->fi_uname) == 0) {
if (res != NULL)
*res = i;
return (B_FALSE);
}
+#if !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
+static boolean_t
+zfs_mod_supported_impl(const char *scope, const char *name, const char *sysfs)
+{
+ boolean_t supported = B_FALSE;
+ char *path;
+
+ int len = asprintf(&path, "%s%s%s%s%s", sysfs,
+ scope == NULL ? "" : "/", scope == NULL ? "" : scope,
+ name == NULL ? "" : "/", name == NULL ? "" : name);
+ if (len > 0) {
+ struct stat64 statbuf;
+ supported = !!(stat64(path, &statbuf) == 0);
+ free(path);
+ }
+
+ return (supported);
+}
+
+boolean_t
+zfs_mod_supported(const char *scope, const char *name)
+{
+ boolean_t supported;
+
+ /*
+ * Check both the primary and alternate sysfs locations to determine
+ * if the required functionality is supported.
+ */
+ supported = (zfs_mod_supported_impl(scope, name, ZFS_SYSFS_DIR) ||
+ zfs_mod_supported_impl(scope, name, ZFS_SYSFS_ALT_DIR));
+
+ /*
+ * For backwards compatibility with kernel modules that predate
+ * supported feature/property checking. Report the feature/property
+ * as supported if the kernel module is loaded but the requested
+ * scope directory does not exist.
+ */
+ if (supported == B_FALSE) {
+ struct stat64 statbuf;
+ if ((stat64(ZFS_SYSFS_DIR, &statbuf) == 0) &&
+ !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_DIR) &&
+ !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_ALT_DIR)) {
+ supported = B_TRUE;
+ }
+ }
+
+ return (supported);
+}
+#endif
+
+static boolean_t
+zfs_mod_supported_feature(const char *name)
+{
+ /*
+ * The zfs module spa_feature_table[], whether in-kernel or in
+ * libzpool, always supports all the features. libzfs needs to
+ * query the running module, via sysfs, to determine which
+ * features are supported.
+ */
+#if defined(_KERNEL) || defined(LIB_ZPOOL_BUILD)
+ return (B_TRUE);
+#else
+ return (zfs_mod_supported(ZFS_SYSFS_POOL_FEATURES, name));
+#endif
+}
+
static void
zfeature_register(spa_feature_t fid, const char *guid, const char *name,
- const char *desc, zfeature_flags_t flags, const spa_feature_t *deps)
+ const char *desc, zfeature_flags_t flags, zfeature_type_t type,
+ const spa_feature_t *deps)
{
zfeature_info_t *feature = &spa_feature_table[fid];
static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
feature->fi_uname = name;
feature->fi_desc = desc;
feature->fi_flags = flags;
+ feature->fi_type = type;
feature->fi_depends = deps;
+ feature->fi_zfs_mod_supported = zfs_mod_supported_feature(guid);
}
void
zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
"com.delphix:async_destroy", "async_destroy",
"Destroy filesystems asynchronously.",
- ZFEATURE_FLAG_READONLY_COMPAT, NULL);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
"com.delphix:empty_bpobj", "empty_bpobj",
"Snapshots use less space.",
- ZFEATURE_FLAG_READONLY_COMPAT, NULL);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
"org.illumos:lz4_compress", "lz4_compress",
"LZ4 compression algorithm support.",
- ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, NULL);
+ ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL);
zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
"com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
"Crash dumps to multiple vdev pools.",
- 0, NULL);
+ 0, ZFEATURE_TYPE_BOOLEAN, NULL);
zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
"com.delphix:spacemap_histogram", "spacemap_histogram",
"Spacemaps maintain space histograms.",
- ZFEATURE_FLAG_READONLY_COMPAT, NULL);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
zfeature_register(SPA_FEATURE_ENABLED_TXG,
"com.delphix:enabled_txg", "enabled_txg",
"Record txg at which a feature is enabled",
- ZFEATURE_FLAG_READONLY_COMPAT, NULL);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
{
static const spa_feature_t hole_birth_deps[] = {
"com.delphix:hole_birth", "hole_birth",
"Retain hole birth txg for more precise zfs send",
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
- hole_birth_deps);
+ ZFEATURE_TYPE_BOOLEAN, hole_birth_deps);
}
+ zfeature_register(SPA_FEATURE_POOL_CHECKPOINT,
+ "com.delphix:zpool_checkpoint", "zpool_checkpoint",
+ "Pool state can be checkpointed, allowing rewind later.",
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
+
+ zfeature_register(SPA_FEATURE_SPACEMAP_V2,
+ "com.delphix:spacemap_v2", "spacemap_v2",
+ "Space maps representing large segments are more efficient.",
+ ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
+ ZFEATURE_TYPE_BOOLEAN, NULL);
+
zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
"com.delphix:extensible_dataset", "extensible_dataset",
"Enhanced dataset functionality, used by other features.",
- 0, NULL);
+ 0, ZFEATURE_TYPE_BOOLEAN, NULL);
{
static const spa_feature_t bookmarks_deps[] = {
zfeature_register(SPA_FEATURE_BOOKMARKS,
"com.delphix:bookmarks", "bookmarks",
"\"zfs bookmark\" command",
- ZFEATURE_FLAG_READONLY_COMPAT, bookmarks_deps);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
+ bookmarks_deps);
}
{
zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
"com.joyent:filesystem_limits", "filesystem_limits",
"Filesystem and snapshot limits.",
- ZFEATURE_FLAG_READONLY_COMPAT, filesystem_limits_deps);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
+ filesystem_limits_deps);
}
zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
"com.delphix:embedded_data", "embedded_data",
"Blocks which compress very well use even less space.",
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
- NULL);
+ ZFEATURE_TYPE_BOOLEAN, NULL);
{
static const spa_feature_t large_blocks_deps[] = {
zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
"org.open-zfs:large_blocks", "large_blocks",
"Support for blocks larger than 128KB.",
- ZFEATURE_FLAG_PER_DATASET, large_blocks_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ large_blocks_deps);
}
{
zfeature_register(SPA_FEATURE_LARGE_DNODE,
"org.zfsonlinux:large_dnode", "large_dnode",
"Variable on-disk size of dnodes.",
- ZFEATURE_FLAG_PER_DATASET, large_dnode_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ large_dnode_deps);
}
{
zfeature_register(SPA_FEATURE_SHA512,
"org.illumos:sha512", "sha512",
"SHA-512/256 hash algorithm.",
- ZFEATURE_FLAG_PER_DATASET, sha512_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ sha512_deps);
}
+
{
static const spa_feature_t skein_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
zfeature_register(SPA_FEATURE_SKEIN,
"org.illumos:skein", "skein",
"Skein hash algorithm.",
- ZFEATURE_FLAG_PER_DATASET, skein_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ skein_deps);
}
{
zfeature_register(SPA_FEATURE_EDONR,
"org.illumos:edonr", "edonr",
"Edon-R hash algorithm.",
- ZFEATURE_FLAG_PER_DATASET, edonr_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ edonr_deps);
+ }
+
+ {
+ static const spa_feature_t redact_books_deps[] = {
+ SPA_FEATURE_BOOKMARK_V2,
+ SPA_FEATURE_EXTENSIBLE_DATASET,
+ SPA_FEATURE_BOOKMARKS,
+ SPA_FEATURE_NONE
+ };
+ zfeature_register(SPA_FEATURE_REDACTION_BOOKMARKS,
+ "com.delphix:redaction_bookmarks", "redaction_bookmarks",
+ "Support for bookmarks which store redaction lists for zfs "
+ "redacted send/recv.", 0, ZFEATURE_TYPE_BOOLEAN,
+ redact_books_deps);
}
+
+ {
+ static const spa_feature_t redact_datasets_deps[] = {
+ SPA_FEATURE_EXTENSIBLE_DATASET,
+ SPA_FEATURE_NONE
+ };
+ zfeature_register(SPA_FEATURE_REDACTED_DATASETS,
+ "com.delphix:redacted_datasets", "redacted_datasets", "Support for "
+ "redacted datasets, produced by receiving a redacted zfs send "
+ "stream.", ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_UINT64_ARRAY,
+ redact_datasets_deps);
+ }
+
+ {
+ static const spa_feature_t bookmark_written_deps[] = {
+ SPA_FEATURE_BOOKMARK_V2,
+ SPA_FEATURE_EXTENSIBLE_DATASET,
+ SPA_FEATURE_BOOKMARKS,
+ SPA_FEATURE_NONE
+ };
+ zfeature_register(SPA_FEATURE_BOOKMARK_WRITTEN,
+ "com.delphix:bookmark_written", "bookmark_written",
+ "Additional accounting, enabling the written#<bookmark> property"
+ "(space written since a bookmark), and estimates of send stream "
+ "sizes for incrementals from bookmarks.",
+ 0, ZFEATURE_TYPE_BOOLEAN, bookmark_written_deps);
+ }
+
zfeature_register(SPA_FEATURE_DEVICE_REMOVAL,
"com.delphix:device_removal", "device_removal",
"Top-level vdevs can be removed, reducing logical pool size.",
- ZFEATURE_FLAG_MOS, NULL);
+ ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL);
+
{
static const spa_feature_t obsolete_counts_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
"com.delphix:obsolete_counts", "obsolete_counts",
"Reduce memory used by removed devices when their blocks are "
"freed or remapped.",
- ZFEATURE_FLAG_READONLY_COMPAT, obsolete_counts_deps);
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
+ obsolete_counts_deps);
}
+
{
static const spa_feature_t userobj_accounting_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
"org.zfsonlinux:userobj_accounting", "userobj_accounting",
"User/Group object accounting.",
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
- userobj_accounting_deps);
+ ZFEATURE_TYPE_BOOLEAN, userobj_accounting_deps);
+ }
+
+ {
+ static const spa_feature_t bookmark_v2_deps[] = {
+ SPA_FEATURE_EXTENSIBLE_DATASET,
+ SPA_FEATURE_BOOKMARKS,
+ SPA_FEATURE_NONE
+ };
+ zfeature_register(SPA_FEATURE_BOOKMARK_V2,
+ "com.datto:bookmark_v2", "bookmark_v2",
+ "Support for larger bookmarks",
+ 0, ZFEATURE_TYPE_BOOLEAN, bookmark_v2_deps);
}
{
static const spa_feature_t encryption_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
+ SPA_FEATURE_BOOKMARK_V2,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_ENCRYPTION,
"com.datto:encryption", "encryption",
"Support for dataset level encryption",
- ZFEATURE_FLAG_PER_DATASET, encryption_deps);
+ ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+ encryption_deps);
}
{
"org.zfsonlinux:project_quota", "project_quota",
"space/object accounting based on project ID.",
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
- project_quota_deps);
+ ZFEATURE_TYPE_BOOLEAN, project_quota_deps);
}
+
+ {
+ zfeature_register(SPA_FEATURE_ALLOCATION_CLASSES,
+ "org.zfsonlinux:allocation_classes", "allocation_classes",
+ "Support for separate allocation classes.",
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
+ }
+
+ zfeature_register(SPA_FEATURE_RESILVER_DEFER,
+ "com.datto:resilver_defer", "resilver_defer",
+ "Support for defering new resilvers when one is already running.",
+ ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL);
}
-#if defined(_KERNEL) && defined(HAVE_SPL)
+#if defined(_KERNEL)
+EXPORT_SYMBOL(zfeature_lookup_guid);
EXPORT_SYMBOL(zfeature_lookup_name);
EXPORT_SYMBOL(zfeature_is_supported);
EXPORT_SYMBOL(zfeature_is_valid_guid);
projects / mirror_zfs.git / blobdiff