freebsd-dev/module/zcommon/zprop_common.c
Brian Behlendorf 79c76d5b65 Change KM_PUSHPAGE -> KM_SLEEP
By marking DMU transaction processing contexts with PF_FSTRANS
we can revert the KM_PUSHPAGE -> KM_SLEEP changes.  This brings
us back in line with upstream.  In some cases this means simply
swapping the flags back.  For others fnvlist_alloc() was replaced
by nvlist_alloc(..., KM_PUSHPAGE) and must be reverted back to
fnvlist_alloc() which assumes KM_SLEEP.

The one place KM_PUSHPAGE is kept is when allocating ARC buffers
which allows us to dip in to reserved memory.  This is again the
same as upstream.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2015-01-16 14:41:26 -08:00

455 lines
11 KiB
C

/*
* 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
* or http://www.opensolaris.org/os/licensing.
* 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 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
/*
* Common routines used by zfs and zpool property management.
*/
#include <sys/zio.h>
#include <sys/spa.h>
#include <sys/zfs_acl.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_znode.h>
#include <sys/fs/zfs.h>
#include "zfs_prop.h"
#include "zfs_deleg.h"
#if defined(_KERNEL)
#include <sys/systm.h>
#include <util/qsort.h>
#else
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#endif
static zprop_desc_t *
zprop_get_proptable(zfs_type_t type)
{
if (type == ZFS_TYPE_POOL)
return (zpool_prop_get_table());
else
return (zfs_prop_get_table());
}
static int
zprop_get_numprops(zfs_type_t type)
{
if (type == ZFS_TYPE_POOL)
return (ZPOOL_NUM_PROPS);
else
return (ZFS_NUM_PROPS);
}
void
zprop_register_impl(int prop, const char *name, zprop_type_t type,
uint64_t numdefault, const char *strdefault, zprop_attr_t attr,
int objset_types, const char *values, const char *colname,
boolean_t rightalign, boolean_t visible, const zprop_index_t *idx_tbl)
{
zprop_desc_t *prop_tbl = zprop_get_proptable(objset_types);
zprop_desc_t *pd;
pd = &prop_tbl[prop];
ASSERT(pd->pd_name == NULL || pd->pd_name == name);
ASSERT(name != NULL);
ASSERT(colname != NULL);
pd->pd_name = name;
pd->pd_propnum = prop;
pd->pd_proptype = type;
pd->pd_numdefault = numdefault;
pd->pd_strdefault = strdefault;
pd->pd_attr = attr;
pd->pd_types = objset_types;
pd->pd_values = values;
pd->pd_colname = colname;
pd->pd_rightalign = rightalign;
pd->pd_visible = visible;
pd->pd_table = idx_tbl;
pd->pd_table_size = 0;
while (idx_tbl && (idx_tbl++)->pi_name != NULL)
pd->pd_table_size++;
}
void
zprop_register_string(int prop, const char *name, const char *def,
zprop_attr_t attr, int objset_types, const char *values,
const char *colname)
{
zprop_register_impl(prop, name, PROP_TYPE_STRING, 0, def, attr,
objset_types, values, colname, B_FALSE, B_TRUE, NULL);
}
void
zprop_register_number(int prop, const char *name, uint64_t def,
zprop_attr_t attr, int objset_types, const char *values,
const char *colname)
{
zprop_register_impl(prop, name, PROP_TYPE_NUMBER, def, NULL, attr,
objset_types, values, colname, B_TRUE, B_TRUE, NULL);
}
void
zprop_register_index(int prop, const char *name, uint64_t def,
zprop_attr_t attr, int objset_types, const char *values,
const char *colname, const zprop_index_t *idx_tbl)
{
zprop_register_impl(prop, name, PROP_TYPE_INDEX, def, NULL, attr,
objset_types, values, colname, B_TRUE, B_TRUE, idx_tbl);
}
void
zprop_register_hidden(int prop, const char *name, zprop_type_t type,
zprop_attr_t attr, int objset_types, const char *colname)
{
zprop_register_impl(prop, name, type, 0, NULL, attr,
objset_types, NULL, colname,
type == PROP_TYPE_NUMBER, B_FALSE, NULL);
}
/*
* A comparison function we can use to order indexes into property tables.
*/
static int
zprop_compare(const void *arg1, const void *arg2)
{
const zprop_desc_t *p1 = *((zprop_desc_t **)arg1);
const zprop_desc_t *p2 = *((zprop_desc_t **)arg2);
boolean_t p1ro, p2ro;
p1ro = (p1->pd_attr == PROP_READONLY);
p2ro = (p2->pd_attr == PROP_READONLY);
if (p1ro == p2ro)
return (strcmp(p1->pd_name, p2->pd_name));
return (p1ro ? -1 : 1);
}
/*
* Iterate over all properties in the given property table, calling back
* into the specified function for each property. We will continue to
* iterate until we either reach the end or the callback function returns
* something other than ZPROP_CONT.
*/
int
zprop_iter_common(zprop_func func, void *cb, boolean_t show_all,
boolean_t ordered, zfs_type_t type)
{
int i, j, num_props, size, prop;
zprop_desc_t *prop_tbl;
zprop_desc_t **order;
prop_tbl = zprop_get_proptable(type);
num_props = zprop_get_numprops(type);
size = num_props * sizeof (zprop_desc_t *);
#if defined(_KERNEL)
order = kmem_alloc(size, KM_SLEEP);
#else
if ((order = malloc(size)) == NULL)
return (ZPROP_CONT);
#endif
for (j = 0; j < num_props; j++)
order[j] = &prop_tbl[j];
if (ordered) {
qsort((void *)order, num_props, sizeof (zprop_desc_t *),
zprop_compare);
}
prop = ZPROP_CONT;
for (i = 0; i < num_props; i++) {
if ((order[i]->pd_visible || show_all) &&
(func(order[i]->pd_propnum, cb) != ZPROP_CONT)) {
prop = order[i]->pd_propnum;
break;
}
}
#if defined(_KERNEL)
kmem_free(order, size);
#else
free(order);
#endif
return (prop);
}
static boolean_t
propname_match(const char *p, size_t len, zprop_desc_t *prop_entry)
{
const char *propname = prop_entry->pd_name;
#ifndef _KERNEL
const char *colname = prop_entry->pd_colname;
int c;
#endif
if (len == strlen(propname) &&
strncmp(p, propname, len) == 0)
return (B_TRUE);
#ifndef _KERNEL
if (colname == NULL || len != strlen(colname))
return (B_FALSE);
for (c = 0; c < len; c++)
if (p[c] != tolower(colname[c]))
break;
return (colname[c] == '\0');
#else
return (B_FALSE);
#endif
}
typedef struct name_to_prop_cb {
const char *propname;
zprop_desc_t *prop_tbl;
} name_to_prop_cb_t;
static int
zprop_name_to_prop_cb(int prop, void *cb_data)
{
name_to_prop_cb_t *data = cb_data;
if (propname_match(data->propname, strlen(data->propname),
&data->prop_tbl[prop]))
return (prop);
return (ZPROP_CONT);
}
int
zprop_name_to_prop(const char *propname, zfs_type_t type)
{
int prop;
name_to_prop_cb_t cb_data;
cb_data.propname = propname;
cb_data.prop_tbl = zprop_get_proptable(type);
prop = zprop_iter_common(zprop_name_to_prop_cb, &cb_data,
B_TRUE, B_FALSE, type);
return (prop == ZPROP_CONT ? ZPROP_INVAL : prop);
}
int
zprop_string_to_index(int prop, const char *string, uint64_t *index,
zfs_type_t type)
{
zprop_desc_t *prop_tbl;
const zprop_index_t *idx_tbl;
int i;
if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
return (-1);
ASSERT(prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
if ((idx_tbl = prop_tbl[prop].pd_table) == NULL)
return (-1);
for (i = 0; idx_tbl[i].pi_name != NULL; i++) {
if (strcmp(string, idx_tbl[i].pi_name) == 0) {
*index = idx_tbl[i].pi_value;
return (0);
}
}
return (-1);
}
int
zprop_index_to_string(int prop, uint64_t index, const char **string,
zfs_type_t type)
{
zprop_desc_t *prop_tbl;
const zprop_index_t *idx_tbl;
int i;
if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
return (-1);
ASSERT(prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
if ((idx_tbl = prop_tbl[prop].pd_table) == NULL)
return (-1);
for (i = 0; idx_tbl[i].pi_name != NULL; i++) {
if (idx_tbl[i].pi_value == index) {
*string = idx_tbl[i].pi_name;
return (0);
}
}
return (-1);
}
/*
* Return a random valid property value. Used by ztest.
*/
uint64_t
zprop_random_value(int prop, uint64_t seed, zfs_type_t type)
{
zprop_desc_t *prop_tbl;
const zprop_index_t *idx_tbl;
ASSERT((uint_t)prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
idx_tbl = prop_tbl[prop].pd_table;
if (idx_tbl == NULL)
return (seed);
return (idx_tbl[seed % prop_tbl[prop].pd_table_size].pi_value);
}
const char *
zprop_values(int prop, zfs_type_t type)
{
zprop_desc_t *prop_tbl;
ASSERT(prop != ZPROP_INVAL && prop != ZPROP_CONT);
ASSERT(prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
return (prop_tbl[prop].pd_values);
}
/*
* Returns TRUE if the property applies to any of the given dataset types.
*
* If headcheck is set, the check is being made against the head dataset
* type of a snapshot which requires to return B_TRUE when the property
* is only valid for snapshots.
*/
boolean_t
zprop_valid_for_type(int prop, zfs_type_t type, boolean_t headcheck)
{
zprop_desc_t *prop_tbl;
if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
return (B_FALSE);
ASSERT(prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
if (headcheck && prop_tbl[prop].pd_types == ZFS_TYPE_SNAPSHOT)
return (B_TRUE);
return ((prop_tbl[prop].pd_types & type) != 0);
}
#ifndef _KERNEL
/*
* Determines the minimum width for the column, and indicates whether it's fixed
* or not. Only string columns are non-fixed.
*/
size_t
zprop_width(int prop, boolean_t *fixed, zfs_type_t type)
{
zprop_desc_t *prop_tbl, *pd;
const zprop_index_t *idx;
size_t ret;
int i;
ASSERT(prop != ZPROP_INVAL && prop != ZPROP_CONT);
ASSERT(prop < zprop_get_numprops(type));
prop_tbl = zprop_get_proptable(type);
pd = &prop_tbl[prop];
*fixed = B_TRUE;
/*
* Start with the width of the column name.
*/
ret = strlen(pd->pd_colname);
/*
* For fixed-width values, make sure the width is large enough to hold
* any possible value.
*/
switch (pd->pd_proptype) {
case PROP_TYPE_NUMBER:
/*
* The maximum length of a human-readable number is 5 characters
* ("20.4M", for example).
*/
if (ret < 5)
ret = 5;
/*
* 'creation' is handled specially because it's a number
* internally, but displayed as a date string.
*/
if (prop == ZFS_PROP_CREATION)
*fixed = B_FALSE;
break;
case PROP_TYPE_INDEX:
idx = prop_tbl[prop].pd_table;
for (i = 0; idx[i].pi_name != NULL; i++) {
if (strlen(idx[i].pi_name) > ret)
ret = strlen(idx[i].pi_name);
}
break;
case PROP_TYPE_STRING:
*fixed = B_FALSE;
break;
}
return (ret);
}
#endif
#if defined(_KERNEL) && defined(HAVE_SPL)
/* Common routines to initialize property tables */
EXPORT_SYMBOL(zprop_register_impl);
EXPORT_SYMBOL(zprop_register_string);
EXPORT_SYMBOL(zprop_register_number);
EXPORT_SYMBOL(zprop_register_index);
EXPORT_SYMBOL(zprop_register_hidden);
/* Common routines for zfs and zpool property management */
EXPORT_SYMBOL(zprop_iter_common);
EXPORT_SYMBOL(zprop_name_to_prop);
EXPORT_SYMBOL(zprop_string_to_index);
EXPORT_SYMBOL(zprop_index_to_string);
EXPORT_SYMBOL(zprop_random_value);
EXPORT_SYMBOL(zprop_values);
EXPORT_SYMBOL(zprop_valid_for_type);
#endif