tests/generic/020

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 020
#
# extended attributes
#
. ./common/preamble
_begin_fstest metadata attr udf auto quick

status=0	# success is the default!

# Import common functions.
. ./common/filter
. ./common/attr

_filter()
{
    sed "s#$TEST_DIR[^ :]*#<TESTFILE>#g; 
            s#$tmp[^ :]*#<TMPFILE>#g" $1
}

_attr()
{
    $ATTR_PROG $* 2>$tmp.err >$tmp.out
    exit=$?
    _filter $tmp.out
    _filter $tmp.err 1>&2
    return $exit
}

do_getfattr()
{
    _getfattr $* 2>$tmp.err >$tmp.out
    exit=$?
    _filter $tmp.out
    _filter $tmp.err 1>&2
    return $exit
}

_attr_list()
{
    file=$1
    
    echo "   *** print attributes"
    if ! do_getfattr -d -e text --absolute-names $file
    then
        echo "      !!! error return"
        return 1
    fi
}

# set fs-specific max_attrs
_attr_get_max()
{
	# set maximum total attr space based on fs type
	case "$FSTYP" in
	xfs|udf|pvfs2|9p|ceph|fuse|nfs|ceph-fuse)
		max_attrs=1000
		;;
	ext2|ext3|ext4)
		# For 4k blocksizes, most of the attributes have an attr_name of
		# "attribute_NN" which is 12, and "value_NN" which is 8.
		# But for larger block sizes, we start having extended
		# attributes of the
		# form "attribute_NNN" or "attribute_NNNN", and "value_NNN" and
		# "value_NNNN", which causes the round(len(..), 4) to jump up by
		# 4 bytes.  So round_up(len(attr_name, 4)) becomes 16 instead of
		# 12, and round_up(len(value, 4)) becomes 12 instead of 8.
		#
		# For 64K blocksize the calculation becomes
		# 	max_attrs = (block_size - 32) / (16 + 12 + 16)
		# or
		# 	max_attrs = (block_size - 32) / 44
		#
		# For 4K blocksize:-
		# 	max_attrs = (block_size - 32) / (16 + 8 + 12)
		# or
		# 	max_attrs = (block_size - 32) / 36
		#
		# Note (for 4K bs) above are exact calculations for attrs of
		# type attribute_NN with values of type value_NN.
		# With above calculations, for 4k blocksize max_attrs becomes
		# 112.
		# This means we can have few attrs of type attribute_NNN with
		# values of
		# type value_NNN. To avoid/handle this we need to add extra 4
		# bytes of headroom.
		#
		# So for 4K, the calculations becomes:-
		# 	max_attrs = (block_size - 32) / (16 + 8 + 12 + 4)
		# or
		# 	max_attrs = (block_size - 32) / 40
		#
		# Assume max ~1 block of attrs
		BLOCK_SIZE=`_get_block_size $TEST_DIR`
		if [ $BLOCK_SIZE -le 4096 ]; then
			let max_attrs=$((($BLOCK_SIZE - 32) / (16 + 8 + 12 + 4)))
		else
			let max_attrs=$((($BLOCK_SIZE - 32) / (16 + 12 + 16 )))
		fi
		;;
	ubifs)
		LEB_SIZE=`_get_leb_size $TEST_DEV`
		# On UBIFS, the number of xattrs has to be less than 50% LEB size
		# divided by 160 (inode size)
		let max_attrs=$((($LEB_SIZE / 2 / 160) - 1))
		;;
	*)
		# Assume max ~1 block of attrs
		BLOCK_SIZE=`_get_block_size $TEST_DIR`
		# user.attribute_XXX="value.XXX" is about 32 bytes; leave some
		# overhead
		let max_attrs=$BLOCK_SIZE/40
	esac
}

# set fs-specific max_attrval_size values. The parameter @max_attrval_namelen is
# required for filesystems which take into account attr name lengths (including
# namespace prefix) when determining limits; parameter @filename is required for
# filesystems that need to take into account already existing attrs.
_attr_get_maxval_size()
{
	local max_attrval_namelen="$1"
	local filename="$2"

	# Set max attr value size in bytes based on fs type
	case "$FSTYP" in
	btrfs)
		_require_btrfs_command inspect-internal dump-super
		local ns=$($BTRFS_UTIL_PROG inspect-internal dump-super \
				$TEST_DEV | sed -n 's/nodesize\s*\(.*\)/\1/p')
		[ -n "$ns" ] || _fail "failed to obtain nodesize"
		# max == nodesize - sizeof(struct btrfs_header)
		#		- sizeof(struct btrfs_item)
		#		- sizeof(struct btrfs_dir_item) - name_len
		max_attrval_size=$(( $ns - 156 - $max_attrval_namelen ))
		;;
	pvfs2)
		max_attrval_size=8192
		;;
	xfs|udf|9p|fuse)
		max_attrval_size=65536
		;;
	bcachefs)
		max_attrval_size=1024
		;;
	nfs)
		# NFS doesn't provide a way to find out the max_attrval_size for
		# the underlying filesystem, so just use the lowest value above.
		max_attrval_size=1024
		;;
	ceph)
		# CephFS does not have a maximum value for attributes.  Instead,
		# it imposes a maximum size for the full set of xattrs
		# names+values, which by default is 64K.  Compute the maximum
		# taking into account the already existing attributes
		local size=$(getfattr --dump -e hex $filename 2>/dev/null | \
			awk -F "=0x" '/^user/ {len += length($1) + length($2) / 2} END {print len}')
		local selinux_size=$(getfattr -n 'security.selinux' --dump -e hex $filename 2>/dev/null | \
			awk -F "=0x" '/^security/ {len += length($1) + length($2) / 2} END {print len}')
		if [ -z $size ]; then
			size=0
		fi
		if [ -z $selinux_size ]; then
			selinux_size=0
		fi
		max_attrval_size=$((65536 - $size - $selinux_size - $max_attrval_namelen))
		;;
	*)
		# Assume max ~1 block of attrs
		BLOCK_SIZE=`_get_block_size $TEST_DIR`
		# leave a little overhead
		let max_attrval_size=$BLOCK_SIZE-256
	esac
}


_require_test
_require_attrs

testfile=$TEST_DIR/attribute_$$

echo "*** list non-existant file"
_attr_list $testfile

echo "*** list empty file"
touch $testfile
_attr_list $testfile

echo "*** query non-existant attribute"
_attr -g "nonexistant" $testfile 2>&1

echo "*** one attribute"
echo "fish" | _attr -s fish $testfile
_attr_list $testfile

echo "*** replace attribute"
echo "fish3" | _attr -s fish $testfile
_attr_list $testfile

echo "*** add attribute"
echo "fish2" | _attr -s snrub $testfile
_attr_list $testfile

echo "*** remove attribute"
_attr -r fish $testfile
_attr_list $testfile

_attr_get_max

echo "*** add lots of attributes"
v=0

while [ $v -lt $max_attrs ]
do
    echo -n "value_$v" | attr -s "attribute_$v" $testfile >>$seqres.full
    if [ $? -ne 0 ]
    then
        echo "!!! failed to add \"attribute_$v\""
        exit 1
    fi
    
    let "v = v + 1"
done

echo "*** check"
# don't print it all out...
_getfattr --absolute-names $testfile \
    | tee -a $seqres.full \
    | $AWK_PROG '
    	/^#/ { next }
	/^[ 	]*$/ { next }
        { l++ } 
	END {print "   *** " (l - 1) " attribute(s)" }' \
    | sed s/$max_attrs/MAX_ATTRS/

echo "*** remove lots of attributes"
v=0
while [ $v -lt $max_attrs ]
do
    if ! $ATTR_PROG -r "attribute_$v" $testfile >>$seqres.full
    then
        echo "!!! failed to remove \"attribute_$v\""
        exit 1
    fi
    
    let "v = v + 1"
done

_attr_list $testfile

echo "*** really long value"
max_attrval_name="long_attr"	# add 5 for "user." prefix
_attr_get_maxval_size "$(( 5 + ${#max_attrval_name} ))" "$testfile"

dd if=/dev/zero bs=1 count=$max_attrval_size 2>/dev/null \
    | _attr -s "$max_attrval_name" $testfile >/dev/null

OCTAL_SIZE=`echo "obase=8; $max_attrval_size" | bc`
_attr -q -g "$max_attrval_name" $testfile | od -w1 -t x1 \
    | sed -e "s/^0*$OCTAL_SIZE$/ATTRSIZE/"
_attr -r "$max_attrval_name" $testfile >/dev/null

echo "*** set/get/remove really long names (expect failure)"
short="XXXXXXXXXX"
long="$short$short$short$short$short$short$short$short$short$short"
vlong="$long$long$long"

_attr -s $vlong -V fish $testfile 2>&1 >/dev/null
_attr -g $vlong $testfile 2>&1 >/dev/null
_attr -r $vlong $testfile 2>&1 >/dev/null

echo "*** check final"

_attr_list $testfile

echo "*** delete"
rm -f $testfile

exit