dsl_pool.c revision 1ab7f2ded02e7a1bc3c73516eb27efa79bf2a2ff
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/dsl_pool.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_synctask.h>
#include <sys/dmu_objset.h>
#include <sys/zfs_context.h>
int zfs_no_write_throttle = 0;
static int
{
int err;
if (err)
return (err);
}
static dsl_pool_t *
{
dsl_pool_t *dp;
extern uint64_t zfs_write_limit_min;
return (dp);
}
int
{
int err;
if (err)
goto out;
&dp->dp_root_dir_obj);
if (err)
goto out;
if (err)
goto out;
if (err)
goto out;
out:
if (err)
else
return (err);
}
void
{
/* drop our reference from dsl_pool_open() */
if (dp->dp_mos_dir)
if (dp->dp_root_dir)
/* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */
if (dp->dp_meta_objset)
}
{
int err;
/* create the pool directory */
/* create and open the root dir */
/* create and open the meta-objset dir */
return (dp);
}
void
{
int err;
else
}
}
}
void
{
}
}
/*
* TRUE if the current thread is the tx_sync_thread or if we
* are being called from SPA context during pool initialization.
*/
int
{
}
{
/*
* Reserve about 1.6% (1/64), or at least 32MB, for allocation
* efficiency.
* XXX The intent log is not accounted for, so it must fit
* within this slop.
*
* If we're trying to assess whether it's OK to do a free,
* cut the reservation in half to allow forward progress
* (e.g. make it possible to rm(1) files from a full pool).
*/
if (netfree)
resv >>= 1;
}
int
{
if (zfs_no_write_throttle) {
return (0);
}
/*
* Check to see if we have exceeded the maximum allowed IO for
* this transaction group. We can do this without locks since
* a little slop here is ok. Note that we do the reserved check
* with only half the requested reserve: this is because the
* reserve requests are worst-case, and we really don't want to
* throttle based off of worst-case estimates.
*/
if (write_limit > 0) {
return (ERESTART);
}
/*
* If this transaction group is over 7/8ths capacity, delay
* the caller 1 clock tick. This will slow down the "fill"
* rate until the sync process can catch up with us.
*/
return (0);
}
void
{
}
void
{
extern uint64_t zfs_write_limit_min;
uint64_t space_inuse = 0;
int i;
return;
for (i = 0; i < TXG_SIZE; i++) {
}
}
void
{
if (space > 0) {
}
}