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8264 want support for promoting datasets in libzfs_core

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illumos/illumos-gate@a4b8c9aa65
a4b8c9aa65

https://www.illumos.org/issues/8264
  Oddly there is a lzc_clone function, but no lzc_promote function.

Reviewed by: Andriy Gapon <avg@FreeBSD.org>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Dan McDonald <danmcd@kebe.com>
Approved by: Dan McDonald <danmcd@kebe.com>
Author: Andrew Stormont <astormont@racktopsystems.com>
This commit is contained in:
Andriy Gapon 2017-06-14 16:27:54 +00:00
parent 71672e5c5d
commit e460d6ff6b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor-sys/illumos/dist/; revision=319946
1 changed files with 36 additions and 3 deletions
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39
uts/common/fs/zfs/zfs_ioctl.c
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@ -31,6 +31,7 @@
* Copyright (c) 2013 Steven Hartland. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Toomas Soome <tsoome@me.com>
* Copyright 2017 RackTop Systems.
*/
/*
@ -4702,7 +4703,6 @@ zfs_ioc_pool_reopen(zfs_cmd_t *zc)
/*
* inputs:
* zc_name name of filesystem
* zc_value name of origin snapshot
*
* outputs:
* zc_string name of conflicting snapshot, if there is one
@ -4710,16 +4710,49 @@ zfs_ioc_pool_reopen(zfs_cmd_t *zc)
static int
zfs_ioc_promote(zfs_cmd_t *zc)
{
dsl_pool_t *dp;
dsl_dataset_t *ds, *ods;
char origin[ZFS_MAX_DATASET_NAME_LEN];
char *cp;
int error;
error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
if (error != 0)
return (error);
error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
if (error != 0) {
dsl_pool_rele(dp, FTAG);
return (error);
}
if (!dsl_dir_is_clone(ds->ds_dir)) {
dsl_dataset_rele(ds, FTAG);
dsl_pool_rele(dp, FTAG);
return (SET_ERROR(EINVAL));
}
error = dsl_dataset_hold_obj(dp,
dsl_dir_phys(ds->ds_dir)->dd_origin_obj, FTAG, &ods);
if (error != 0) {
dsl_dataset_rele(ds, FTAG);
dsl_pool_rele(dp, FTAG);
return (error);
}
dsl_dataset_name(ods, origin);
dsl_dataset_rele(ods, FTAG);
dsl_dataset_rele(ds, FTAG);
dsl_pool_rele(dp, FTAG);
/*
* We don't need to unmount *all* the origin fs's snapshots, but
* it's easier.
*/
cp = strchr(zc->zc_value, '@');
cp = strchr(origin, '@');
if (cp)
*cp = '\0';
(void) dmu_objset_find(zc->zc_value,
(void) dmu_objset_find(origin,
zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
}