1# vim: filetype=sh
2#
3# CDDL HEADER START
4#
5# The contents of this file are subject to the terms of the
6# Common Development and Distribution License (the "License").
7# You may not use this file except in compliance with the License.
8#
9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10# or http://www.opensolaris.org/os/licensing.
11# See the License for the specific language governing permissions
12# and limitations under the License.
13#
14# When distributing Covered Code, include this CDDL HEADER in each
15# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16# If applicable, add the following below this CDDL HEADER, with the
17# fields enclosed by brackets "[]" replaced with your own identifying
18# information: Portions Copyright [yyyy] [name of copyright owner]
19#
20# CDDL HEADER END
21#
22
23#
24# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
25# Use is subject to license terms.
26
27#
28# Function to set the reservation property of a dataset to
29# 'none' and verify that it is correctly set using both the
30# "normal" 'zfs get reservation' and the '-p' option which
31# gives a numerical value.
32#
33function zero_reservation
34{
35	typeset resv_val
36	dataset=$1
37
38	log_must $ZFS set reservation=none $dataset
39	log_must $ZFS set refreservation=none $dataset
40
41	resv_val=`$ZFS get -H refreservation $dataset | awk '{print $3}'`
42	if [[ $? -ne 0 ]]; then
43		log_fail "Unable to get reservation prop on $dataset"
44	elif [[ $resv_val != "none" ]]; then
45		log_fail "Reservation not 'none' ($resv_val) as expected"
46	fi
47
48
49	resv_val=`$ZFS get -pH refreservation $dataset | awk '{print $3}'`
50	if [[ $? -ne 0 ]]; then
51		log_fail "Unable to get reservation prop on $dataset"
52	elif [[ $resv_val -ne 0 ]]; then
53		log_fail "Reservation not 0 ($resv_val) as expected"
54	fi
55
56	return 0
57}
58
59#
60# Utility function to see if two values are within a certain specified
61# limit of each other. Used primarily to check that a dataset's parent
62# is correctly accounting for space used/available. Need this function as
63# currently there is some slop in the way space is accounted (i.e. can't
64# do a direct comparison).
65#
66function within_limits
67{
68	typeset -l valA=$1
69	typeset -l valB=$2
70	typeset -l delta=$3
71
72	if (( valA <= valB )); then
73		if (( (valB - valA) <= delta )); then
74                	return 0
75		fi
76	elif (( valB <= valA )); then
77		if (( (valA - valB) <= delta )); then
78			return 0
79		fi
80	fi
81
82	return 1
83}
84
85#
86# Function to create and mount multiple filesystems. The filesystem
87# will be named according to the name specified with a suffix value
88# taken from the loop counter.
89#
90function create_multiple_fs # num_fs base_fs_name base_mnt_name
91{
92        typeset -i iter=0
93        typeset -i count=$1
94        typeset FS_NAME=$2
95        typeset MNT_NAME=$3
96
97        while  (( $iter < $count )); do
98                log_must $ZFS create ${FS_NAME}$iter
99                log_must $ZFS set mountpoint=${MNT_NAME}$iter ${FS_NAME}$iter
100                (( iter = iter + 1 ))
101        done
102}
103
104#
105# This function compute the largest volume size which is multiple of volume
106# block size (default 8K) and not greater than the largest expected volsize.
107#
108# $1 The largest expected volume size.
109# $2 The volume block size
110#
111function floor_volsize #<largest_volsize> [volblksize]
112{
113	typeset -l largest_volsize=$1
114	typeset -l volblksize=${2:-8192}
115
116	if (( largest_volsize < volblksize )); then
117		log_fail "The largest_volsize must be greater than volblksize."
118	fi
119	typeset -l real_volsize
120	typeset -l n
121
122	(( n = largest_volsize / volblksize ))
123	(( largest_volsize = volblksize * n ))
124
125	print $largest_volsize
126}
127
128#
129# Simple function to get the expected reservation for a ZVOL given the
130# volume size, block size, and number of copies.
131#
132# NB: This routine must be kept in sync with the ZFS library function
133# libzfs_dataset.c:zvol_volsize_to_reservation().  Refer to that function
134# for the logic behind the calculations.
135#
136function zvol_volsize_to_reservation
137{
138	typeset resv_val
139	typeset nblocks
140	typeset numdb
141	typeset volsize=$1
142	typeset volblocksize=$2
143	typeset ncopies=$3
144	typeset ncopies_bp
145	typeset DN_MAX_INDBLKSHIFT=17
146	typeset SPA_BLKPTRSHIFT=7
147	typeset SPA_DVAS_PER_BP=3
148	typeset DVAS_PER_BP
149	typeset DNODES_PER_LEVEL_SHIFT
150	typeset DNODES_PER_LEVEL
151	typeset DN_MAX_INDBLKS
152
153	(( DNODES_PER_LEVEL_SHIFT = DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT ))
154	(( DNODES_PER_LEVEL = 1 << DNODES_PER_LEVEL_SHIFT ))
155	(( DN_MAX_INDBLKS = 1 << DN_MAX_INDBLKSHIFT ))
156
157	resv_val=$volsize
158	(( nblocks = volsize / volblocksize ))
159	numdb=7
160	while (( nblocks > 1 )); do
161		(( nblocks = nblocks + DNODES_PER_LEVEL - 1 ))
162		(( nblocks = nblocks / DNODES_PER_LEVEL ))
163		(( numdb = numdb + nblocks ))
164	done
165	(( ncopies_bp = ncopies + 1 ))
166	DVAS_PER_BP=$(min $SPA_DVAS_PER_BP $ncopies_bp)
167	(( numdb = numdb * DVAS_PER_BP ))
168	(( resv_val = volsize * ncopies ))
169	(( numdb = numdb * DN_MAX_INDBLKS ))
170	(( resv_val = resv_val + numdb ))
171
172	$ECHO $resv_val
173	return 0
174}
175
176