# lsscsi-sysfs-fixture.sh — materialise the lsscsi sysfs fixture tree under $1.
#
# SOURCED (not exec'd) by 99-lsscsi.test, which is why it takes no shebang and
# sets no options: the suite owns the shell.
#
# WHAT THIS IS. lsscsi(8) reads /sys and nothing else — it issues no ioctl and
# opens no device — so the whole tool is measurable offline against a synthetic
# sysfs. This is that sysfs: four hosts on four different transports carrying a
# disk, a tape, an enclosure, a cd/dvd and a second and third disk, plus one
# NVMe controller. Every attribute lsscsi 0.30 reads for any of its listing
# forms is present, so no form renders a placeholder for want of a fixture.
#
# IT IS THE FIXTURE, IN REVIEWABLE FORM. brintos-selftests installs data/ with
# `install -m 0644 data/*`, which is a flat file copy and cannot carry a
# directory tree, so the ~330-file tree is shipped as the deterministic script
# that builds it rather than as the tree itself. The expected outputs beside it
# (data/lsscsi-expected-*.txt) were captured from a native x86-64 build of the
# same lsscsi source against the tree THIS script produces, so a drift here
# reddens the comparison rather than passing quietly.
#
# IT IS WRITTEN FOR A GUEST THAT IS SLOW TO exec. Every path is spelled out
# instead of being computed with dirname/cut, mkdir is called once per group
# rather than once per file, and file bodies go out through the shell's own
# `printf >` — so the whole tree costs ~40 execs rather than ~400. The argv of
# each mkdir is kept well under this platform's 8192 B __wasm32_args_buf
# (brintos/hardwarejs#15); do not collapse them into one call.

R=$1

P=$R/devices/pci0000:00
H0=$P/0000:00:10.0/host0
H1=$P/0000:00:11.0/host1
H2=$P/0000:00:12.0/host2
H3=$P/0000:00:13.0/host3
D0=$H0/target0:0:0/0:0:0:0
D1=$H0/target0:0:1/0:0:1:0
D2=$H1/port-1:0/end_device-1:0/target1:0:0/1:0:0:0
D3=$H1/port-1:1/end_device-1:1/target1:0:1/1:0:1:0
D4=$H2/rport-2:0-0/target2:0:0/2:0:0:0
D5=$H3/session3/target3:0:0/3:0:0:0
N0=$P/0000:00:14.0/nvme/nvme0

mkdir -p "$D0/block/sda/queue" "$D0/scsi_generic/sg0" "$D0/scsi_disk/0:0:0:0"
mkdir -p "$D1/scsi_tape/st0" "$D1/scsi_generic/sg1"
mkdir -p "$D2/block/sdb/queue" "$D2/block/sdb/integrity" "$D2/scsi_generic/sg2" "$D2/scsi_disk/1:0:0:0"
mkdir -p "$D3/enclosure/1:0:1:0" "$D3/scsi_generic/sg3"
mkdir -p "$D4/block/sr0/queue" "$D4/scsi_generic/sg4"
mkdir -p "$D5/block/sdc/queue" "$D5/scsi_generic/sg5" "$D5/scsi_disk/3:0:0:0"
mkdir -p "$N0/nvme0n1/queue"

# --- the six logical units ---------------------------------------------------
# Common attributes first; the per-LU differences follow each block.
for d in "$D0" "$D1" "$D2" "$D3" "$D4" "$D5"; do
    printf 'running\n' > "$d/state"
    printf '32\n'      > "$d/queue_depth"
    printf '0\n'       > "$d/device_blocked"
    printf '30\n'      > "$d/timeout"
    printf '0x10\n'    > "$d/iodone_cnt"
    printf '0x10\n'    > "$d/iorequest_cnt"
    printf '0x0\n'     > "$d/ioerr_cnt"
    printf 'EMCRAFT\n' > "$d/vendor"
done

printf '0\n'                 > "$D0/type"
printf 'BRINTOS DISK A\n'    > "$D0/model"
printf '1.00\n'              > "$D0/rev"
printf '5\n'                 > "$D0/scsi_level"
printf '247:0\n'             > "$D0/block/sda/dev"
printf '2097152\n'           > "$D0/block/sda/size"
printf '512\n'               > "$D0/block/sda/queue/logical_block_size"
printf '512\n'               > "$D0/block/sda/queue/physical_block_size"
printf '512\n'               > "$D0/block/sda/queue/hw_sector_size"
printf '247:64\n'            > "$D0/scsi_generic/sg0/dev"
printf '0\n'                 > "$D0/scsi_disk/0:0:0:0/protection_type"
printf 'none\n'              > "$D0/scsi_disk/0:0:0:0/protection_mode"
printf '0\n'                 > "$D0/scsi_disk/0:0:0:0/app_tag_own"
printf 'write back\n'        > "$D0/scsi_disk/0:0:0:0/cache_type"
printf '1\n'                 > "$D0/scsi_disk/0:0:0:0/FUA"
# VPD page 0x83: one NAA-6 (IEEE Registered Extended) designator, binary code
# set. This is what --unit renders as the logical-unit name.
printf '\000\203\000\024\001\003\000\020\140\005\014\301\340\253\315\000\000\000\000\000\000\000\000\001' > "$D0/vpd_pg83"

printf '1\n'                 > "$D1/type"
printf 'BRINTOS TAPE A\n'    > "$D1/model"
printf '2.10\n'              > "$D1/rev"
printf '3\n'                 > "$D1/scsi_level"
printf '247:1\n'             > "$D1/scsi_tape/st0/dev"
printf '247:65\n'            > "$D1/scsi_generic/sg1/dev"
# lsscsi 0.30 resolves a tape node through the legacy `scsi_tape:st<N>` link,
# not through the `scsi_tape/` directory the modern kernel also presents. Carry
# both, so the fixture is faithful AND the tool has something it can follow.
ln -sfn scsi_tape/st0 "$D1/scsi_tape:st0"

printf '0\n'                 > "$D2/type"
printf 'BRINTOS DISK B\n'    > "$D2/model"
printf '3.02\n'              > "$D2/rev"
printf '6\n'                 > "$D2/scsi_level"
printf '247:16\n'            > "$D2/block/sdb/dev"
printf '20971520\n'          > "$D2/block/sdb/size"
printf '512\n'               > "$D2/block/sdb/queue/logical_block_size"
printf '4096\n'              > "$D2/block/sdb/queue/physical_block_size"
printf '512\n'               > "$D2/block/sdb/queue/hw_sector_size"
printf 'T10-DIF-TYPE1-CRC\n' > "$D2/block/sdb/integrity/format"
printf '0\n'                 > "$D2/block/sdb/integrity/tag_size"
printf '1\n'                 > "$D2/block/sdb/integrity/read_verify"
printf '1\n'                 > "$D2/block/sdb/integrity/write_generate"
printf '247:66\n'            > "$D2/scsi_generic/sg2/dev"
printf '1\n'                 > "$D2/scsi_disk/1:0:0:0/protection_type"
printf 'dix1+dif1\n'         > "$D2/scsi_disk/1:0:0:0/protection_mode"
printf '0\n'                 > "$D2/scsi_disk/1:0:0:0/app_tag_own"
printf 'write through\n'     > "$D2/scsi_disk/1:0:0:0/cache_type"
printf '1\n'                 > "$D2/scsi_disk/1:0:0:0/FUA"

printf '13\n'                > "$D3/type"
printf 'BRINTOS ENCL A\n'    > "$D3/model"
printf '0.55\n'              > "$D3/rev"
printf '5\n'                 > "$D3/scsi_level"
printf '247:67\n'            > "$D3/scsi_generic/sg3/dev"

printf '5\n'                 > "$D4/type"
printf 'BRINTOS CDROM A\n'   > "$D4/model"
printf '1.50\n'              > "$D4/rev"
printf '5\n'                 > "$D4/scsi_level"
printf '247:32\n'            > "$D4/block/sr0/dev"
printf '1385920\n'           > "$D4/block/sr0/size"
printf '2048\n'              > "$D4/block/sr0/queue/logical_block_size"
printf '2048\n'              > "$D4/block/sr0/queue/physical_block_size"
printf '2048\n'              > "$D4/block/sr0/queue/hw_sector_size"
printf '247:68\n'            > "$D4/scsi_generic/sg4/dev"

printf '0\n'                 > "$D5/type"
printf 'BRINTOS DISK C\n'    > "$D5/model"
printf '4.44\n'              > "$D5/rev"
printf '7\n'                 > "$D5/scsi_level"
printf '247:48\n'            > "$D5/block/sdc/dev"
printf '41943040\n'          > "$D5/block/sdc/size"
printf '4096\n'              > "$D5/block/sdc/queue/logical_block_size"
printf '4096\n'              > "$D5/block/sdc/queue/physical_block_size"
printf '512\n'               > "$D5/block/sdc/queue/hw_sector_size"
printf '247:69\n'            > "$D5/scsi_generic/sg5/dev"
printf '0\n'                 > "$D5/scsi_disk/3:0:0:0/protection_type"
printf 'none\n'              > "$D5/scsi_disk/3:0:0:0/protection_mode"

# --- the four hosts ----------------------------------------------------------
for h in "$H0" "$H1" "$H2" "$H3"; do
    printf '0\n'   > "$h/host_busy"
    printf '1\n'   > "$h/cmd_per_lun"
    printf '128\n' > "$h/can_queue"
    printf '128\n' > "$h/sg_tablesize"
    printf '0\n'   > "$h/unchecked_isa_dma"
    printf '0\n'   > "$h/prot_capabilities"
    printf '0\n'   > "$h/prot_guard_type"
    printf 'running\n' > "$h/state"
done
printf 'sym53c8xx\n' > "$H0/proc_name"; printf '0\n' > "$H0/unique_id"
printf 'mpt3sas\n'   > "$H1/proc_name"; printf '1\n' > "$H1/unique_id"
printf 'qla2xxx\n'   > "$H2/proc_name"; printf '2\n' > "$H2/unique_id"
printf 'iscsi_tcp\n' > "$H3/proc_name"; printf '3\n' > "$H3/unique_id"

# --- the NVMe controller -----------------------------------------------------
printf 'EMCRAFT BRINTOS NVME\n' > "$N0/model"
printf '1.0\n'                  > "$N0/firmware_rev"
printf 'BRINTOS0000001\n'       > "$N0/serial"
printf '1\n'                    > "$N0/cntlid"
printf 'live\n'                 > "$N0/state"
printf 'pcie\n'                 > "$N0/transport"
printf '247:80\n'               > "$N0/nvme0n1/dev"
printf '1\n'                    > "$N0/nvme0n1/nsid"
printf '4194304\n'              > "$N0/nvme0n1/size"
printf '512\n'                  > "$N0/nvme0n1/queue/logical_block_size"
printf '512\n'                  > "$N0/nvme0n1/queue/physical_block_size"

# --- the class and bus views -------------------------------------------------
mkdir -p "$R/class/scsi_host" "$R/class/scsi_device/0:0:0:0" \
         "$R/class/scsi_device/0:0:1:0" "$R/class/scsi_device/1:0:0:0"
mkdir -p "$R/class/scsi_device/1:0:1:0" "$R/class/scsi_device/2:0:0:0" \
         "$R/class/scsi_device/3:0:0:0" "$R/bus/scsi/devices"
mkdir -p "$R/class/block" "$R/class/nvme"

ln -sfn ../../devices/pci0000:00/0000:00:10.0/host0 "$R/class/scsi_host/host0"
ln -sfn ../../devices/pci0000:00/0000:00:11.0/host1 "$R/class/scsi_host/host1"
ln -sfn ../../devices/pci0000:00/0000:00:12.0/host2 "$R/class/scsi_host/host2"
ln -sfn ../../devices/pci0000:00/0000:00:13.0/host3 "$R/class/scsi_host/host3"

R0=devices/pci0000:00/0000:00:10.0/host0/target0:0:0/0:0:0:0
R1=devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0
R2=devices/pci0000:00/0000:00:11.0/host1/port-1:0/end_device-1:0/target1:0:0/1:0:0:0
R3=devices/pci0000:00/0000:00:11.0/host1/port-1:1/end_device-1:1/target1:0:1/1:0:1:0
R4=devices/pci0000:00/0000:00:12.0/host2/rport-2:0-0/target2:0:0/2:0:0:0
R5=devices/pci0000:00/0000:00:13.0/host3/session3/target3:0:0/3:0:0:0

ln -sfn "../../../$R0" "$R/class/scsi_device/0:0:0:0/device"
ln -sfn "../../../$R1" "$R/class/scsi_device/0:0:1:0/device"
ln -sfn "../../../$R2" "$R/class/scsi_device/1:0:0:0/device"
ln -sfn "../../../$R3" "$R/class/scsi_device/1:0:1:0/device"
ln -sfn "../../../$R4" "$R/class/scsi_device/2:0:0:0/device"
ln -sfn "../../../$R5" "$R/class/scsi_device/3:0:0:0/device"

ln -sfn "../../../$R0" "$R/bus/scsi/devices/0:0:0:0"
ln -sfn "../../../$R1" "$R/bus/scsi/devices/0:0:1:0"
ln -sfn "../../../$R2" "$R/bus/scsi/devices/1:0:0:0"
ln -sfn "../../../$R3" "$R/bus/scsi/devices/1:0:1:0"
ln -sfn "../../../$R4" "$R/bus/scsi/devices/2:0:0:0"
ln -sfn "../../../$R5" "$R/bus/scsi/devices/3:0:0:0"

ln -sfn "../../../${R0%/*}" "$R/bus/scsi/devices/target0:0:0"
ln -sfn "../../../${R1%/*}" "$R/bus/scsi/devices/target0:0:1"
ln -sfn "../../../${R2%/*}" "$R/bus/scsi/devices/target1:0:0"
ln -sfn "../../../${R3%/*}" "$R/bus/scsi/devices/target1:0:1"
ln -sfn "../../../${R4%/*}" "$R/bus/scsi/devices/target2:0:0"
ln -sfn "../../../${R5%/*}" "$R/bus/scsi/devices/target3:0:0"

ln -sfn ../../../devices/pci0000:00/0000:00:10.0/host0 "$R/bus/scsi/devices/host0"
ln -sfn ../../../devices/pci0000:00/0000:00:11.0/host1 "$R/bus/scsi/devices/host1"
ln -sfn ../../../devices/pci0000:00/0000:00:12.0/host2 "$R/bus/scsi/devices/host2"
ln -sfn ../../../devices/pci0000:00/0000:00:13.0/host3 "$R/bus/scsi/devices/host3"

ln -sfn "../../$R0/block/sda" "$R/class/block/sda"
ln -sfn "../../$R2/block/sdb" "$R/class/block/sdb"
ln -sfn "../../$R4/block/sr0" "$R/class/block/sr0"
ln -sfn "../../$R5/block/sdc" "$R/class/block/sdc"
ln -sfn ../../devices/pci0000:00/0000:00:14.0/nvme/nvme0 "$R/class/nvme/nvme0"

# --- the four transport classes ----------------------------------------------
mkdir -p "$R/class/spi_host/host0" "$R/class/spi_transport/target0:0:0" \
         "$R/class/spi_transport/target0:0:1"
printf 'LVD\n' > "$R/class/spi_host/host0/signalling"
printf '320\n' > "$R/class/spi_transport/target0:0:0/max_speed"
printf '1\n'   > "$R/class/spi_transport/target0:0:0/width"
printf '8\n'   > "$R/class/spi_transport/target0:0:0/period"
printf '63\n'  > "$R/class/spi_transport/target0:0:0/offset"
printf '160\n' > "$R/class/spi_transport/target0:0:1/max_speed"
printf '1\n'   > "$R/class/spi_transport/target0:0:1/width"
printf '12\n'  > "$R/class/spi_transport/target0:0:1/period"
printf '31\n'  > "$R/class/spi_transport/target0:0:1/offset"

mkdir -p "$R/class/sas_host/host1" "$R/class/sas_device/end_device-1:0" \
         "$R/class/sas_device/end_device-1:1"
mkdir -p "$R/class/sas_end_device/end_device-1:0" "$R/class/sas_end_device/end_device-1:1" \
         "$R/class/sas_phy/phy-1:0" "$R/class/sas_phy/phy-1:1"
printf '0x5000c50012345678\n' > "$R/class/sas_host/host1/device_name"
printf '0x5000c5001234abcd\n' > "$R/class/sas_device/end_device-1:0/sas_address"
printf '0\n'                  > "$R/class/sas_device/end_device-1:0/phy_identifier"
printf 'end device\n'         > "$R/class/sas_device/end_device-1:0/device_type"
printf '0x5000c5001234abce\n' > "$R/class/sas_device/end_device-1:1/sas_address"
printf '1\n'                  > "$R/class/sas_device/end_device-1:1/phy_identifier"
printf 'end device\n'         > "$R/class/sas_device/end_device-1:1/device_type"
printf '0\n'    > "$R/class/sas_end_device/end_device-1:0/initiator_response_timeout"
printf '2000\n' > "$R/class/sas_end_device/end_device-1:0/I_T_nexus_loss_timeout"
printf '0\n'    > "$R/class/sas_end_device/end_device-1:1/initiator_response_timeout"
printf '2000\n' > "$R/class/sas_end_device/end_device-1:1/I_T_nexus_loss_timeout"
printf '0x5000c50012345678\n' > "$R/class/sas_phy/phy-1:0/sas_address"
printf '0\n'                  > "$R/class/sas_phy/phy-1:0/phy_identifier"
printf '12.0 Gbit\n'          > "$R/class/sas_phy/phy-1:0/negotiated_linkrate"
printf '0x5000c50012345678\n' > "$R/class/sas_phy/phy-1:1/sas_address"
printf '1\n'                  > "$R/class/sas_phy/phy-1:1/phy_identifier"
printf '12.0 Gbit\n'          > "$R/class/sas_phy/phy-1:1/negotiated_linkrate"

mkdir -p "$R/class/fc_host/host2" "$R/class/fc_remote_ports/rport-2:0-0" \
         "$R/class/fc_transport/target2:0:0"
printf '0x21000024ff123456\n' > "$R/class/fc_host/host2/port_name"
printf '0x20000024ff123456\n' > "$R/class/fc_host/host2/node_name"
printf '0x010200\n'           > "$R/class/fc_host/host2/port_id"
printf 'Online\n'             > "$R/class/fc_host/host2/port_state"
printf '8 Gbit\n'             > "$R/class/fc_host/host2/speed"
printf '0x50060160c1e0abcd\n' > "$R/class/fc_remote_ports/rport-2:0-0/port_name"
printf '0x50060160c1e0abce\n' > "$R/class/fc_remote_ports/rport-2:0-0/node_name"
printf '0x010300\n'           > "$R/class/fc_remote_ports/rport-2:0-0/port_id"
printf 'FCP Target\n'         > "$R/class/fc_remote_ports/rport-2:0-0/roles"
printf '0x50060160c1e0abcd\n' > "$R/class/fc_transport/target2:0:0/port_name"
printf '0x50060160c1e0abce\n' > "$R/class/fc_transport/target2:0:0/node_name"
printf '0x010300\n'           > "$R/class/fc_transport/target2:0:0/port_id"

# The device-level iSCSI probe walks class/iscsi_host/hostN/device looking for
# the session that carries this LU's target, so the host has to reach it.
mkdir -p "$R/class/iscsi_host/host3/device/session3/target3:0:0" \
         "$R/class/iscsi_session/session3"
printf '52:54:00:12:34:56\n'              > "$R/class/iscsi_host/host3/hwaddress"
printf '10.0.2.15\n'                      > "$R/class/iscsi_host/host3/ipaddress"
printf 'iqn.2026-08.com.emcraft:brintos\n' > "$R/class/iscsi_host/host3/initiatorname"
printf 'iqn.2026-08.com.emcraft:target0\n' > "$R/class/iscsi_session/session3/targetname"
printf '1\n'                              > "$R/class/iscsi_session/session3/tpgt"
ln -sfn ../../../iscsi_session/session3 "$R/class/iscsi_host/host3/device/session3/iscsi_session"