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mirror_zfs/module/zfs/zfs_quota.c
Pawel Jakub Dawidek 67a1b03791
Implementation of block cloning for ZFS 
Block Cloning allows to manually clone a file (or a subset of its
blocks) into another (or the same) file by just creating additional
references to the data blocks without copying the data itself.
Those references are kept in the Block Reference Tables (BRTs).

The whole design of block cloning is documented in module/zfs/brt.c.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes #13392
2023-03-10 11:59:53 -08:00

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/*
* 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 https://opensource.org/licenses/CDDL-1.0.
* 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 Pawel Jakub Dawidek
* Copyright (c) 2012, 2015, 2018 by Delphix. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
*/
/* Portions Copyright 2010 Robert Milkowski */
#include <sys/avl.h>
#include <sys/dmu_objset.h>
#include <sys/sa.h>
#include <sys/sa_impl.h>
#include <sys/zap.h>
#include <sys/zfs_project.h>
#include <sys/zfs_quota.h>
#include <sys/zfs_znode.h>
int
zpl_get_file_info(dmu_object_type_t bonustype, const void *data,
zfs_file_info_t *zoi)
{
/*
* Is it a valid type of object to track?
*/
if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA)
return (SET_ERROR(ENOENT));
zoi->zfi_project = ZFS_DEFAULT_PROJID;
/*
* If we have a NULL data pointer
* then assume the id's aren't changing and
* return EEXIST to the dmu to let it know to
* use the same ids
*/
if (data == NULL)
return (SET_ERROR(EEXIST));
if (bonustype == DMU_OT_ZNODE) {
const znode_phys_t *znp = data;
zoi->zfi_user = znp->zp_uid;
zoi->zfi_group = znp->zp_gid;
zoi->zfi_generation = znp->zp_gen;
return (0);
}
const sa_hdr_phys_t *sap = data;
if (sap->sa_magic == 0) {
/*
* This should only happen for newly created files
* that haven't had the znode data filled in yet.
*/
zoi->zfi_user = 0;
zoi->zfi_group = 0;
zoi->zfi_generation = 0;
return (0);
}
sa_hdr_phys_t sa = *sap;
boolean_t swap = B_FALSE;
if (sa.sa_magic == BSWAP_32(SA_MAGIC)) {
sa.sa_magic = SA_MAGIC;
sa.sa_layout_info = BSWAP_16(sa.sa_layout_info);
swap = B_TRUE;
}
VERIFY3U(sa.sa_magic, ==, SA_MAGIC);
int hdrsize = sa_hdrsize(&sa);
VERIFY3U(hdrsize, >=, sizeof (sa_hdr_phys_t));
uintptr_t data_after_hdr = (uintptr_t)data + hdrsize;
zoi->zfi_user = *((uint64_t *)(data_after_hdr + SA_UID_OFFSET));
zoi->zfi_group = *((uint64_t *)(data_after_hdr + SA_GID_OFFSET));
zoi->zfi_generation = *((uint64_t *)(data_after_hdr + SA_GEN_OFFSET));
uint64_t flags = *((uint64_t *)(data_after_hdr + SA_FLAGS_OFFSET));
if (swap)
flags = BSWAP_64(flags);
if (flags & ZFS_PROJID) {
zoi->zfi_project =
*((uint64_t *)(data_after_hdr + SA_PROJID_OFFSET));
}
if (swap) {
zoi->zfi_user = BSWAP_64(zoi->zfi_user);
zoi->zfi_group = BSWAP_64(zoi->zfi_group);
zoi->zfi_project = BSWAP_64(zoi->zfi_project);
zoi->zfi_generation = BSWAP_64(zoi->zfi_generation);
}
return (0);
}
static void
fuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr,
char *domainbuf, int buflen, uid_t *ridp)
{
uint64_t fuid;
const char *domain;
fuid = zfs_strtonum(fuidstr, NULL);
domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid));
if (domain)
(void) strlcpy(domainbuf, domain, buflen);
else
domainbuf[0] = '\0';
*ridp = FUID_RID(fuid);
}
static uint64_t
zfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type)
{
switch (type) {
case ZFS_PROP_USERUSED:
case ZFS_PROP_USEROBJUSED:
return (DMU_USERUSED_OBJECT);
case ZFS_PROP_GROUPUSED:
case ZFS_PROP_GROUPOBJUSED:
return (DMU_GROUPUSED_OBJECT);
case ZFS_PROP_PROJECTUSED:
case ZFS_PROP_PROJECTOBJUSED:
return (DMU_PROJECTUSED_OBJECT);
case ZFS_PROP_USERQUOTA:
return (zfsvfs->z_userquota_obj);
case ZFS_PROP_GROUPQUOTA:
return (zfsvfs->z_groupquota_obj);
case ZFS_PROP_USEROBJQUOTA:
return (zfsvfs->z_userobjquota_obj);
case ZFS_PROP_GROUPOBJQUOTA:
return (zfsvfs->z_groupobjquota_obj);
case ZFS_PROP_PROJECTQUOTA:
return (zfsvfs->z_projectquota_obj);
case ZFS_PROP_PROJECTOBJQUOTA:
return (zfsvfs->z_projectobjquota_obj);
default:
return (ZFS_NO_OBJECT);
}
}
int
zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
uint64_t *cookiep, void *vbuf, uint64_t *bufsizep)
{
int error;
zap_cursor_t zc;
zap_attribute_t za;
zfs_useracct_t *buf = vbuf;
uint64_t obj;
int offset = 0;
if (!dmu_objset_userspace_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if ((type == ZFS_PROP_PROJECTQUOTA || type == ZFS_PROP_PROJECTUSED ||
type == ZFS_PROP_PROJECTOBJQUOTA ||
type == ZFS_PROP_PROJECTOBJUSED) &&
!dmu_objset_projectquota_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if ((type == ZFS_PROP_USEROBJUSED || type == ZFS_PROP_GROUPOBJUSED ||
type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA ||
type == ZFS_PROP_PROJECTOBJUSED ||
type == ZFS_PROP_PROJECTOBJQUOTA) &&
!dmu_objset_userobjspace_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
obj = zfs_userquota_prop_to_obj(zfsvfs, type);
if (obj == ZFS_NO_OBJECT) {
*bufsizep = 0;
return (0);
}
if (type == ZFS_PROP_USEROBJUSED || type == ZFS_PROP_GROUPOBJUSED ||
type == ZFS_PROP_PROJECTOBJUSED)
offset = DMU_OBJACCT_PREFIX_LEN;
for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep);
(error = zap_cursor_retrieve(&zc, &za)) == 0;
zap_cursor_advance(&zc)) {
if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) >
*bufsizep)
break;
/*
* skip object quota (with zap name prefix DMU_OBJACCT_PREFIX)
* when dealing with block quota and vice versa.
*/
if ((offset > 0) != (strncmp(za.za_name, DMU_OBJACCT_PREFIX,
DMU_OBJACCT_PREFIX_LEN) == 0))
continue;
fuidstr_to_sid(zfsvfs, za.za_name + offset,
buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid);
buf->zu_space = za.za_first_integer;
buf++;
}
if (error == ENOENT)
error = 0;
ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep);
*bufsizep = (uintptr_t)buf - (uintptr_t)vbuf;
*cookiep = zap_cursor_serialize(&zc);
zap_cursor_fini(&zc);
return (error);
}
int
zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
const char *domain, uint64_t rid, uint64_t *valp)
{
char buf[20 + DMU_OBJACCT_PREFIX_LEN];
int offset = 0;
int err;
uint64_t obj;
*valp = 0;
if (!dmu_objset_userspace_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if ((type == ZFS_PROP_USEROBJUSED || type == ZFS_PROP_GROUPOBJUSED ||
type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA ||
type == ZFS_PROP_PROJECTOBJUSED ||
type == ZFS_PROP_PROJECTOBJQUOTA) &&
!dmu_objset_userobjspace_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if (type == ZFS_PROP_PROJECTQUOTA || type == ZFS_PROP_PROJECTUSED ||
type == ZFS_PROP_PROJECTOBJQUOTA ||
type == ZFS_PROP_PROJECTOBJUSED) {
if (!dmu_objset_projectquota_present(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if (!zpl_is_valid_projid(rid))
return (SET_ERROR(EINVAL));
}
obj = zfs_userquota_prop_to_obj(zfsvfs, type);
if (obj == ZFS_NO_OBJECT)
return (0);
if (type == ZFS_PROP_USEROBJUSED || type == ZFS_PROP_GROUPOBJUSED ||
type == ZFS_PROP_PROJECTOBJUSED) {
strlcpy(buf, DMU_OBJACCT_PREFIX, DMU_OBJACCT_PREFIX_LEN + 1);
offset = DMU_OBJACCT_PREFIX_LEN;
}
err = zfs_id_to_fuidstr(zfsvfs, domain, rid, buf + offset,
sizeof (buf) - offset, B_FALSE);
if (err)
return (err);
err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp);
if (err == ENOENT)
err = 0;
return (err);
}
int
zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
const char *domain, uint64_t rid, uint64_t quota)
{
char buf[32];
int err;
dmu_tx_t *tx;
uint64_t *objp;
boolean_t fuid_dirtied;
if (zfsvfs->z_version < ZPL_VERSION_USERSPACE)
return (SET_ERROR(ENOTSUP));
switch (type) {
case ZFS_PROP_USERQUOTA:
objp = &zfsvfs->z_userquota_obj;
break;
case ZFS_PROP_GROUPQUOTA:
objp = &zfsvfs->z_groupquota_obj;
break;
case ZFS_PROP_USEROBJQUOTA:
objp = &zfsvfs->z_userobjquota_obj;
break;
case ZFS_PROP_GROUPOBJQUOTA:
objp = &zfsvfs->z_groupobjquota_obj;
break;
case ZFS_PROP_PROJECTQUOTA:
if (!dmu_objset_projectquota_enabled(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if (!zpl_is_valid_projid(rid))
return (SET_ERROR(EINVAL));
objp = &zfsvfs->z_projectquota_obj;
break;
case ZFS_PROP_PROJECTOBJQUOTA:
if (!dmu_objset_projectquota_enabled(zfsvfs->z_os))
return (SET_ERROR(ENOTSUP));
if (!zpl_is_valid_projid(rid))
return (SET_ERROR(EINVAL));
objp = &zfsvfs->z_projectobjquota_obj;
break;
default:
return (SET_ERROR(EINVAL));
}
err = zfs_id_to_fuidstr(zfsvfs, domain, rid, buf, sizeof (buf), B_TRUE);
if (err)
return (err);
fuid_dirtied = zfsvfs->z_fuid_dirty;
tx = dmu_tx_create(zfsvfs->z_os);
dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL);
if (*objp == 0) {
dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE,
zfs_userquota_prop_prefixes[type]);
}
if (fuid_dirtied)
zfs_fuid_txhold(zfsvfs, tx);
err = dmu_tx_assign(tx, TXG_WAIT);
if (err) {
dmu_tx_abort(tx);
return (err);
}
mutex_enter(&zfsvfs->z_lock);
if (*objp == 0) {
*objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA,
DMU_OT_NONE, 0, tx);
VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
zfs_userquota_prop_prefixes[type], 8, 1, objp, tx));
}
mutex_exit(&zfsvfs->z_lock);
if (quota == 0) {
err = zap_remove(zfsvfs->z_os, *objp, buf, tx);
if (err == ENOENT)
err = 0;
} else {
err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, &quota, tx);
}
ASSERT(err == 0);
if (fuid_dirtied)
zfs_fuid_sync(zfsvfs, tx);
dmu_tx_commit(tx);
return (err);
}
boolean_t
zfs_id_overobjquota(zfsvfs_t *zfsvfs, uint64_t usedobj, uint64_t id)
{
char buf[20 + DMU_OBJACCT_PREFIX_LEN];
uint64_t used, quota, quotaobj;
int err;
if (!dmu_objset_userobjspace_present(zfsvfs->z_os)) {
if (dmu_objset_userobjspace_upgradable(zfsvfs->z_os)) {
dsl_pool_config_enter(
dmu_objset_pool(zfsvfs->z_os), FTAG);
dmu_objset_id_quota_upgrade(zfsvfs->z_os);
dsl_pool_config_exit(
dmu_objset_pool(zfsvfs->z_os), FTAG);
}
return (B_FALSE);
}
if (usedobj == DMU_PROJECTUSED_OBJECT) {
if (!dmu_objset_projectquota_present(zfsvfs->z_os)) {
if (dmu_objset_projectquota_upgradable(zfsvfs->z_os)) {
dsl_pool_config_enter(
dmu_objset_pool(zfsvfs->z_os), FTAG);
dmu_objset_id_quota_upgrade(zfsvfs->z_os);
dsl_pool_config_exit(
dmu_objset_pool(zfsvfs->z_os), FTAG);
}
return (B_FALSE);
}
quotaobj = zfsvfs->z_projectobjquota_obj;
} else if (usedobj == DMU_USERUSED_OBJECT) {
quotaobj = zfsvfs->z_userobjquota_obj;
} else if (usedobj == DMU_GROUPUSED_OBJECT) {
quotaobj = zfsvfs->z_groupobjquota_obj;
} else {
return (B_FALSE);
}
if (quotaobj == 0 || zfsvfs->z_replay)
return (B_FALSE);
(void) snprintf(buf, sizeof (buf), "%llx", (longlong_t)id);
err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, &quota);
if (err != 0)
return (B_FALSE);
(void) snprintf(buf, sizeof (buf), DMU_OBJACCT_PREFIX "%llx",
(longlong_t)id);
err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used);
if (err != 0)
return (B_FALSE);
return (used >= quota);
}
boolean_t
zfs_id_overblockquota(zfsvfs_t *zfsvfs, uint64_t usedobj, uint64_t id)
{
char buf[20];
uint64_t used, quota, quotaobj;
int err;
if (usedobj == DMU_PROJECTUSED_OBJECT) {
if (!dmu_objset_projectquota_present(zfsvfs->z_os)) {
if (dmu_objset_projectquota_upgradable(zfsvfs->z_os)) {
dsl_pool_config_enter(
dmu_objset_pool(zfsvfs->z_os), FTAG);
dmu_objset_id_quota_upgrade(zfsvfs->z_os);
dsl_pool_config_exit(
dmu_objset_pool(zfsvfs->z_os), FTAG);
}
return (B_FALSE);
}
quotaobj = zfsvfs->z_projectquota_obj;
} else if (usedobj == DMU_USERUSED_OBJECT) {
quotaobj = zfsvfs->z_userquota_obj;
} else if (usedobj == DMU_GROUPUSED_OBJECT) {
quotaobj = zfsvfs->z_groupquota_obj;
} else {
return (B_FALSE);
}
if (quotaobj == 0 || zfsvfs->z_replay)
return (B_FALSE);
(void) snprintf(buf, sizeof (buf), "%llx", (longlong_t)id);
err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, &quota);
if (err != 0)
return (B_FALSE);
err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used);
if (err != 0)
return (B_FALSE);
return (used >= quota);
}
boolean_t
zfs_id_overquota(zfsvfs_t *zfsvfs, uint64_t usedobj, uint64_t id)
{
return (zfs_id_overblockquota(zfsvfs, usedobj, id) ||
zfs_id_overobjquota(zfsvfs, usedobj, id));
}
EXPORT_SYMBOL(zpl_get_file_info);
EXPORT_SYMBOL(zfs_userspace_one);
EXPORT_SYMBOL(zfs_userspace_many);
EXPORT_SYMBOL(zfs_set_userquota);
EXPORT_SYMBOL(zfs_id_overblockquota);
EXPORT_SYMBOL(zfs_id_overobjquota);
EXPORT_SYMBOL(zfs_id_overquota);
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