dsl_userhold.c revision fc7a6e3fefc649cb65c8e2a35d194781445008b0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2013 by Delphix. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/dsl_userhold.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_destroy.h>
#include <sys/dsl_synctask.h>
#include <sys/zfs_onexit.h>
#include <sys/dsl_pool.h>
#include <sys/zfs_ioctl.h>
typedef struct dsl_dataset_user_hold_arg {
/*
* If you add new checks here, you may need to add additional checks to the
* "temporary" case in snapshot_check() in dmu_objset.c.
*/
int
{
int error = 0;
return (E2BIG);
/* Tempholds have a more restricted length */
return (E2BIG);
/* tags must be unique (if ds already exists) */
if (error == 0)
error = 0;
}
}
return (error);
}
static int
{
int rv = 0;
int error = 0;
char *htag;
/* must be a snapshot */
if (error == 0)
if (error == 0) {
}
if (error == 0) {
}
if (error != 0) {
}
}
return (rv);
}
void
{
/*
* This is the first user hold for this dataset. Create
* the userrefs zap object.
*/
} else {
}
ds->ds_userrefs++;
if (minor != 0) {
}
"tag=%s temp=%d refs=%llu",
}
static void
{
}
}
/*
* holds is nvl of snapname -> holdname
* errlist will be filled in with snapname -> error
* if cleanup_minor is not 0, the holds will be temporary, cleaned up
* when the process exits.
*
* if any fails, all will fail.
*/
int
{
return (0);
}
typedef struct dsl_dataset_user_release_arg {
static int
{
int error;
int numholds = 0;
if (!dsl_dataset_is_snapshot(ds))
if (zapobj == 0)
/* Make sure the hold exists */
if (error != 0)
return (error);
numholds++;
}
/* we need to destroy the snapshot as well */
if (dsl_dataset_long_held(ds))
}
return (0);
}
static int
{
int rv = 0;
if (!dmu_tx_is_syncing(tx))
return (0);
int error;
if (error != 0)
if (error == 0) {
name);
}
}
if (error != 0) {
}
}
}
return (rv);
}
static void
{
int error;
ds->ds_userrefs--;
}
}
static void
{
nvpair_name(pair))) {
}
}
}
/*
* holds is nvl of snapname -> { holdname, ... }
* errlist will be filled in with snapname -> error
*
* if any fails, all will fail.
*/
int
{
int error;
return (0);
return (error);
}
typedef struct dsl_dataset_user_release_tmp_arg {
static int
{
int error;
if (!dmu_tx_is_syncing(tx))
return (0);
if (error)
return (error);
return (error);
}
static void
{
if (ddurta->ddurta_deleteme) {
}
}
/*
* Called at spa_load time to release a stale temporary user hold.
* Also called by the onexit code.
*/
void
{
int error;
#ifdef _KERNEL
/* Make sure it is not mounted. */
if (error == 0) {
char name[MAXNAMELEN];
(void) zfs_unmount_snap(name);
} else {
}
#endif
}
typedef struct zfs_hold_cleanup_arg {
char zhca_spaname[MAXNAMELEN];
char zhca_htag[MAXNAMELEN];
static void
{
int error;
if (error != 0) {
zfs_dbgmsg("couldn't release hold on pool=%s ds=%llu tag=%s "
"because pool is no longer loaded",
return;
}
zfs_dbgmsg("couldn't release hold on pool=%s ds=%llu tag=%s "
"because pool is no longer loaded (guid doesn't match)",
return;
}
}
void
{
sizeof (ca->zhca_spaname));
}
int
{
dsl_pool_t *dp;
int err;
if (err != 0)
return (err);
if (err != 0) {
return (err);
}
zap_cursor_advance(&zc)) {
}
}
return (0);
}