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Illumos #3996

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3996 want a libzfs_core API to rollback to latest snapshot
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Andy Stormont <andyjstormont@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/3996
  illumos/illumos-gate@a7027df17f

Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
This commit is contained in:
Matthew Ahrens
2013-08-14 11:42:31 -08:00
committed by Brian Behlendorf
parent 5d1f7fb647
commit 46ba1e59d3
6 changed files with 57 additions and 26 deletions
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module/zfs/zfs_ioctl.c
+15 -10
View File
@@ -3488,29 +3488,32 @@ zfs_ioc_destroy(zfs_cmd_t *zc)
}
/*
* inputs:
* zc_name name of dataset to rollback (to most recent snapshot)
* fsname is name of dataset to rollback (to most recent snapshot)
*
* outputs: none
* innvl is not used.
*
* outnvl: "target" -> name of most recent snapshot
* }
*/
/* ARGSUSED */
static int
zfs_ioc_rollback(zfs_cmd_t *zc)
zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
{
zfs_sb_t *zsb;
int error;
if (get_zfs_sb(zc->zc_name, &zsb) == 0) {
if (get_zfs_sb(fsname, &zsb) == 0) {
error = zfs_suspend_fs(zsb);
if (error == 0) {
int resume_err;
error = dsl_dataset_rollback(zc->zc_name, zsb);
resume_err = zfs_resume_fs(zsb, zc->zc_name);
error = dsl_dataset_rollback(fsname, zsb, outnvl);
resume_err = zfs_resume_fs(zsb, fsname);
error = error ? error : resume_err;
}
deactivate_super(zsb->z_sb);
} else {
error = dsl_dataset_rollback(zc->zc_name, NULL);
error = dsl_dataset_rollback(fsname, NULL, outnvl);
}
return (error);
}
@@ -5273,6 +5276,10 @@ zfs_ioctl_init(void)
zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
/* IOCTLS that use the legacy function signature */
zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
@@ -5384,8 +5391,6 @@ zfs_ioctl_init(void)
zfs_secpolicy_none);
zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
zfs_secpolicy_destroy);
zfs_ioctl_register_dataset_modify(ZFS_IOC_ROLLBACK, zfs_ioc_rollback,
zfs_secpolicy_rollback);
zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
zfs_secpolicy_rename);
zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,