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Johannes Thumshirn 5795eb4430 scsi: sd_zbc: emulate ZONE_APPEND commands 
Emulate ZONE_APPEND for SCSI disks using a regular WRITE(16) command
with a start LBA set to the target zone write pointer position.

In order to always know the write pointer position of a sequential write
zone, the write pointer of all zones is tracked using an array of 32bits
zone write pointer offset attached to the scsi disk structure. Each
entry of the array indicate a zone write pointer position relative to
the zone start sector. The write pointer offsets are maintained in sync
with the device as follows:
1) the write pointer offset of a zone is reset to 0 when a
   REQ_OP_ZONE_RESET command completes.
2) the write pointer offset of a zone is set to the zone size when a
   REQ_OP_ZONE_FINISH command completes.
3) the write pointer offset of a zone is incremented by the number of
   512B sectors written when a write, write same or a zone append
   command completes.
4) the write pointer offset of all zones is reset to 0 when a
   REQ_OP_ZONE_RESET_ALL command completes.

Since the block layer does not write lock zones for zone append
commands, to ensure a sequential ordering of the regular write commands
used for the emulation, the target zone of a zone append command is
locked when the function sd_zbc_prepare_zone_append() is called from
sd_setup_read_write_cmnd(). If the zone write lock cannot be obtained
(e.g. a zone append is in-flight or a regular write has already locked
the zone), the zone append command dispatching is delayed by returning
BLK_STS_ZONE_RESOURCE.

To avoid the need for write locking all zones for REQ_OP_ZONE_RESET_ALL
requests, use a spinlock to protect accesses and modifications of the
zone write pointer offsets. This spinlock is initialized from sd_probe()
using the new function sd_zbc_init().

Co-developed-by: Damien Le Moal <Damien.LeMoal@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-05-12 20:36:28 -06:00
..
aacraid SCSI misc on 20200410 2020-04-10 12:21:11 -07:00
aic7xxx SCSI misc on 20200410 2020-04-10 12:21:11 -07:00
aic94xx compat_ioctl: scsi: handle HDIO commands from drivers 2020-01-03 09:42:52 +01:00
arcmsr SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
arm
be2iscsi scsi: be2iscsi: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:09 -04:00
bfa
bnx2fc scsi: bnx2fc: fix boolreturn.cocci warnings 2020-03-31 22:35:02 -04:00
bnx2i remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
csiostor SCSI misc on 20200129 2020-01-29 18:16:16 -08:00
cxgbi SCSI fixes on 20191227 2019-12-27 17:28:41 -08:00
cxlflash SCSI misc on 20191130 2019-12-02 13:37:02 -08:00
device_handler
dpt scsi: docs: convert dpti.txt to ReST 2020-03-11 23:07:59 -04:00
esas2r proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
fcoe
fnic scsi: fnic: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:10 -04:00
hisi_sas scsi: hisi_sas: Fix build error without SATA_HOST 2020-04-13 13:28:13 -04:00
ibmvscsi scsi: ibmvfc: Fix NULL return compiler warning 2020-03-11 23:07:57 -04:00
ibmvscsi_tgt scsi: ibmvscsi_tgt: remove set but not used variables 'iue' and 'sd' 2019-12-19 22:08:54 -05:00
isci SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
libfc SCSI misc on 20200410 2020-04-10 12:21:11 -07:00
libsas ata: make SATA_PMP option selectable only if any SATA host driver is enabled 2020-03-26 10:28:17 -06:00
lpfc SCSI misc on 20200410 2020-04-10 12:21:11 -07:00
megaraid SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
mpt3sas scsi: mpt3sas: Fix kernel panic observed on soft HBA unplug 2020-03-31 22:02:37 -04:00
mvsas scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
pcmcia scsi: docs: convert NinjaSCSI.txt to ReST 2020-03-11 23:08:01 -04:00
pm8001 scsi: pm80xx: Introduce read and write length for IOCTL payload structure 2020-03-17 13:57:19 -04:00
qedf scsi: qedf: Use pci_get_dsn() 2020-03-05 17:36:24 -08:00
qedi scsi: qedi: Add PCI shutdown handler support 2020-03-26 22:38:54 -04:00
qla2xxx scsi: qla2xxx: Fix regression warnings 2020-04-13 13:58:18 -04:00
qla4xxx scsi: qla4xxx: Adjust indentation in qla4xxx_mem_free 2019-12-19 22:08:55 -05:00
smartpqi scsi: smartpqi: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:13 -04:00
snic scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
sym53c8xx_2 scsi: sym53c8xx: fix typos in comments 2019-12-19 22:08:54 -05:00
ufs SCSI misc on 20200410 2020-04-10 12:21:11 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
3w-9xxx.c
3w-9xxx.h
3w-sas.c
3w-sas.h
3w-xxxx.c
3w-xxxx.h
53c700.c
53c700.h
53c700.scr
53c700_d.h_shipped
a100u2w.c
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c scsi: advansys: Replace zero-length array with flexible-array member 2020-02-18 00:39:54 -05:00
aha152x.c scsi: docs: convert aha152x.txt to ReST 2020-03-11 23:07:58 -04:00
aha152x.h
aha1542.c
aha1542.h
aha1740.c scsi: aha1740: Fix an errro handling path in aha1740_probe() 2020-03-26 21:10:53 -04:00
aha1740.h
am53c974.c
atari_scsi.c
atp870u.c
atp870u.h
BusLogic.c SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
BusLogic.h
bvme6000_scsi.c
ch.c scsi: ch: remove ch_mutex() 2020-02-24 14:54:25 -05:00
constants.c scsi: core: Add DID_ALLOC_FAILURE and DID_MEDIUM_ERROR to hostbyte_table 2020-04-01 22:03:04 -04:00
dc395x.c scsi: dc395x: remove dc395x_bios_param 2020-03-26 22:51:18 -04:00
dc395x.h
dmx3191d.c
dpt_i2o.c scsi: docs: convert dpti.txt to ReST 2020-03-11 23:07:59 -04:00
dpti.h scsi: docs: convert dpti.txt to ReST 2020-03-11 23:07:59 -04:00
esp_scsi.c scsi: esp_scsi: Add support for FSC chip 2019-12-19 22:08:51 -05:00
esp_scsi.h scsi: esp_scsi: Add support for FSC chip 2019-12-19 22:08:51 -05:00
fdomain.c
fdomain.h
fdomain_isa.c
fdomain_pci.c
FlashPoint.c
g_NCR5380.c scsi: docs: convert g_NCR5380.txt to ReST 2020-03-11 23:08:00 -04:00
gdth.c
gdth.h
gdth_ioctl.h
gdth_proc.c scsi: gdth: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:10 -04:00
gdth_proc.h
gvp11.c
gvp11.h
hosts.c scsi: core: add scsi_host_busy_iter() 2020-02-28 20:54:52 -05:00
hpsa.c scsi: hpsa: correct race condition in offload enabled 2020-03-26 22:44:41 -04:00
hpsa.h
hpsa_cmd.h
hptiop.c
hptiop.h
imm.c
imm.h
initio.c scsi: initio: make initio_state_7() static 2019-12-19 22:08:54 -05:00
initio.h
ipr.c SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
ipr.h SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
ips.c
ips.h
iscsi_boot_sysfs.c
iscsi_tcp.c scsi: iscsi: Don't destroy session if there are outstanding connections 2020-01-15 22:48:34 -05:00
iscsi_tcp.h
jazz_esp.c
Kconfig SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
lasi700.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
libiscsi.c scsi: libiscsi: Fix error count for active session 2020-03-26 22:48:58 -04:00
libiscsi_tcp.c
mac53c94.c
mac53c94.h
mac_esp.c
mac_scsi.c
Makefile
megaraid.c scsi: simplify scsi_partsize 2020-03-24 07:57:07 -06:00
megaraid.h
mesh.c
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c
mvumi.h scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
myrb.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
myrb.h scsi: mylex: Use the correct style for SPDX License Identifier 2020-01-02 21:57:44 -05:00
myrs.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
myrs.h scsi: mylex: Use the correct style for SPDX License Identifier 2020-01-02 21:57:44 -05:00
ncr53c8xx.c scsi: docs: convert ncr53c8xx.txt to ReST 2020-03-11 23:08:01 -04:00
ncr53c8xx.h
NCR5380.c
NCR5380.h
nsp32.c
nsp32.h
nsp32_debug.c
nsp32_io.h
pmcraid.c
pmcraid.h scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
ppa.c
ppa.h
ps3rom.c
qla1280.c scsi: qla1280: Make checking for 64bit support consistent 2020-01-20 18:35:55 -05:00
qla1280.h scsi: qla1280: Fix dma firmware download, if dma address is 64bit 2020-01-15 23:09:11 -05:00
qlogicfas.c
qlogicfas408.c
qlogicfas408.h
qlogicpti.c
qlogicpti.h
raid_class.c
script_asm.pl
scsi.c scsi: core: Remove cmd_list functionality 2020-02-28 20:54:55 -05:00
scsi.h
scsi_common.c
scsi_debug.c block: move struct partition out of genhd.h 2020-03-24 07:57:08 -06:00
scsi_debugfs.c
scsi_debugfs.h
scsi_devinfo.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
scsi_dh.c
scsi_error.c scsi: core: Remove cmd_list functionality 2020-02-28 20:54:55 -05:00
scsi_ioctl.c compat_ioctl: add scsi_compat_ioctl 2020-01-03 09:33:18 +01:00
scsi_lib.c block: Introduce REQ_OP_ZONE_APPEND 2020-05-12 20:36:28 -06:00
scsi_lib_dma.c
scsi_logging.c
scsi_logging.h scsi: core: Fix a compiler warning triggered by the SCSI logging code 2019-12-19 22:08:54 -05:00
scsi_netlink.c
scsi_pm.c
scsi_priv.h scsi: core: Remove cmd_list functionality 2020-02-28 20:54:55 -05:00
scsi_proc.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
scsi_sas_internal.h
scsi_scan.c scsi: core: Remove cmd_list functionality 2020-02-28 20:54:55 -05:00
scsi_sysctl.c
scsi_sysfs.c scsi: core: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:12 -04:00
scsi_trace.c scsi: scsi_trace: Use get_unaligned_be24() 2020-03-16 22:08:36 -04:00
scsi_transport_api.h
scsi_transport_fc.c
scsi_transport_iscsi.c scsi: iscsi: Report unbind session event when the target has been removed 2020-03-31 21:39:58 -04:00
scsi_transport_sas.c scsi: scsi_transport_sas: Fix memory leak when removing devices 2019-11-21 21:12:39 -05:00
scsi_transport_spi.c
scsi_transport_srp.c
scsicam.c block: move struct partition out of genhd.h 2020-03-24 07:57:08 -06:00
sd.c scsi: sd_zbc: emulate ZONE_APPEND commands 2020-05-12 20:36:28 -06:00
sd.h scsi: sd_zbc: emulate ZONE_APPEND commands 2020-05-12 20:36:28 -06:00
sd_dif.c
sd_zbc.c scsi: sd_zbc: emulate ZONE_APPEND commands 2020-05-12 20:36:28 -06:00
sense_codes.h
ses.c
sg.c scsi: sg: add sg_remove_request in sg_common_write 2020-04-13 21:58:48 -04:00
sgiwd93.c
sim710.c
sni_53c710.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
sr.c block: add a cdrom_device_info pointer to struct gendisk 2020-05-04 10:13:42 -06:00
sr.h scsi: sr: get rid of sr global mutex 2020-02-24 15:01:57 -05:00
sr_ioctl.c
sr_vendor.c scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled 2020-02-24 14:59:01 -05:00
st.c scsi: st: Use get_unaligned_be24() and sign_extend32() 2020-03-16 22:08:34 -04:00
st.h
st_options.h
stex.c scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
storvsc_drv.c scsi: storvsc: Correctly set number of hardware queues for IDE disk 2020-01-15 23:02:24 -05:00
sun3_scsi.c
sun3_scsi_vme.c
sun3x_esp.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
sun_esp.c
virtio_scsi.c scsi: core: remove .for_blk_mq 2020-02-10 22:46:55 -05:00
vmw_pvscsi.c scsi: vmw_pvscsi: Silence dma mapping errors 2019-12-19 22:42:44 -05:00
vmw_pvscsi.h
wd33c93.c
wd33c93.h
wd719x.c
wd719x.h
xen-scsifront.c
zalon.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
zorro7xx.c
zorro_esp.c scsi: zorro_esp: Restore devm_ioremap() alignment 2020-02-12 22:56:47 -05:00