block/rnbd: Kill rnbd_clt_destroy_default_group

No need to have it since we can call sysfs_remove_group in the
rnbd_clt_destroy_sysfs_files.

Then rnbd_clt_destroy_sysfs_files is paired with it's co

block/rnbd: Kill rnbd_clt_destroy_default_group

No need to have it since we can call sysfs_remove_group in the
rnbd_clt_destroy_sysfs_files.

Then rnbd_clt_destroy_sysfs_files is paired with it's counterpart
rnbd_clt_create_sysfs_files.

Signed-off-by: Guoqing Jiang <guoqing.jiang@ionos.com>
Reviewed-by: Danil Kipnis <danil.kipnis@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210419073722.15351-7-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge remote-tracking branch 'net/master'

Merge branches 'rgrp-glock-sharing' and 'gfs2-revoke' from https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git

Merge the resource group glock sharing feature and the revoke accountin

Merge branches 'rgrp-glock-sharing' and 'gfs2-revoke' from https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git

Merge the resource group glock sharing feature and the revoke accounting rework.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

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Merge branch 'for-5.12/google' into for-linus

- User experience improvements for hid-google from Nicolas Boichat

Merge branch 'next' into for-linus

Prepare input updates for 5.12 merge window.

Merge tag 'v5.11' into next

Merge with mainline to get latest APIs and device tree bindings.

Merge tag 'amba-make-remove-return-void' of https://git.pengutronix.de/git/ukl/linux into devel-stable

Tag for adaptions to struct amba_driver::remove changing prototype

Merge branch 'cpuidle-fix' into fixes

Merge drm/drm-next into drm-intel-gt-next

Backmerging to get a common base for merging topic branches between
drm-intel-next and drm-intel-gt-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@l

Merge drm/drm-next into drm-intel-gt-next

Backmerging to get a common base for merging topic branches between
drm-intel-next and drm-intel-gt-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Merge drm/drm-next into drm-intel-next

sync-up to not fall too much behind.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge branch 'for-linus' into for-next

Back-merge of 5.11-devel branch for syncing the result changes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge tag 'asoc-fix-v5.11-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.11

A collection of mostly driver specific fixes, plus a maintainers

Merge tag 'asoc-fix-v5.11-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.11

A collection of mostly driver specific fixes, plus a maintainership
update for TI and a fix for DAPM driver removal paths.

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Merge drm/drm-next into drm-misc-next

Staying in sync to drm-next, and to be able to pull ttm fixes.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Merge tag 'v5.11-rc1' into spi-5.11

Linux 5.11-rc1

Merge tag 'v5.11-rc1' into regulator-5.11

Linux 5.11-rc1

Merge tag 'v5.11-rc1' into asoc-5.11

Linux 5.11-rc1

Merge tag 'block-5.11-2020-12-23' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
"A few stragglers in here, but mostly just straight fixes. In
particular:

- Set of rnbd

Merge tag 'block-5.11-2020-12-23' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
"A few stragglers in here, but mostly just straight fixes. In
particular:

- Set of rnbd fixes for issues around changes for the merge window
(Gioh, Jack, Md Haris Iqbal)

- iocost tracepoint addition (Baolin)

- Copyright/maintainers update (Christoph)

- Remove old blk-mq fast path CPU warning (Daniel)

- loop max_part fix (Josh)

- Remote IPI threaded IRQ fix (Sebastian)

- dasd stable fixes (Stefan)

- bcache merge window fixup and style fixup (Yi, Zheng)"

* tag 'block-5.11-2020-12-23' of git://git.kernel.dk/linux-block:
md/bcache: convert comma to semicolon
bcache:remove a superfluous check in register_bcache
block: update some copyrights
block: remove a pointless self-reference in block_dev.c
MAINTAINERS: add fs/block_dev.c to the block section
blk-mq: Don't complete on a remote CPU in force threaded mode
s390/dasd: fix list corruption of lcu list
s390/dasd: fix list corruption of pavgroup group list
s390/dasd: prevent inconsistent LCU device data
s390/dasd: fix hanging device offline processing
blk-iocost: Add iocg idle state tracepoint
nbd: Respect max_part for all partition scans
block/rnbd-clt: Does not request pdu to rtrs-clt
block/rnbd-clt: Dynamically allocate sglist for rnbd_iu
block/rnbd: Set write-back cache and fua same to the target device
block/rnbd: Fix typos
block/rnbd-srv: Protect dev session sysfs removal
block/rnbd-clt: Fix possible memleak
block/rnbd-clt: Get rid of warning regarding size argument in strlcpy
blk-mq: Remove 'running from the wrong CPU' warning

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Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up fixes and check what UAPI headers need to be synched.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

block/rnbd-clt: Dynamically allocate sglist for rnbd_iu

The BMAX_SEGMENT static array for scatterlist is embedded in
rnbd_iu structure to avoid memory allocation in hot IO path.
In many cases, we do

block/rnbd-clt: Dynamically allocate sglist for rnbd_iu

The BMAX_SEGMENT static array for scatterlist is embedded in
rnbd_iu structure to avoid memory allocation in hot IO path.
In many cases, we do need only several sg entries because many IOs
have only several segments.

This patch change rnbd_iu to check the number of segments in the request
and allocate sglist dynamically.

For io path, use sg_alloc_table_chained to allocate sg list faster.

First it makes two sg entries after pdu of request.
The sg_alloc_table_chained uses the pre-allocated sg entries
if the number of segments of the request is less than two.
So it reduces the number of memory allocation.

Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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block/rnbd: Set write-back cache and fua same to the target device

The rnbd-client always sets the write-back cache and fua attributes
of the rnbd device queue regardless of the target device on the

block/rnbd: Set write-back cache and fua same to the target device

The rnbd-client always sets the write-back cache and fua attributes
of the rnbd device queue regardless of the target device on the server.
That generates IO hang issue when the target device does not
support both of write-back cacne and fua.

This patch adds more fields for the cache policy and fua into the
device opening message. The rnbd-server sends the information
if the target device supports the write-back cache and fua
and rnbd-client recevives it and set the device queue accordingly.

Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
[jwang: some minor change, rename a few varables, remove unrelated comments.]
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge tag 'for-5.11/drivers-2020-12-14' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
"Nothing major in here:

- NVMe pull request from Christoph:
- nvmet

Merge tag 'for-5.11/drivers-2020-12-14' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
"Nothing major in here:

- NVMe pull request from Christoph:
- nvmet passthrough improvements (Chaitanya Kulkarni)
- fcloop error injection support (James Smart)
- read-only support for zoned namespaces without Zone Append
(Javier González)
- improve some error message (Minwoo Im)
- reject I/O to offline fabrics namespaces (Victor Gladkov)
- PCI queue allocation cleanups (Niklas Schnelle)
- remove an unused allocation in nvmet (Amit Engel)
- a Kconfig spelling fix (Colin Ian King)
- nvme_req_qid simplication (Baolin Wang)

- MD pull request from Song:
- Fix race condition in md_ioctl() (Dae R. Jeong)
- Initialize read_slot properly for raid10 (Kevin Vigor)
- Code cleanup (Pankaj Gupta)
- md-cluster resync/reshape fix (Zhao Heming)

- Move null_blk into its own directory (Damien Le Moal)

- null_blk zone and discard improvements (Damien Le Moal)

- bcache race fix (Dongsheng Yang)

- Set of rnbd fixes/improvements (Gioh Kim, Guoqing Jiang, Jack Wang,
Lutz Pogrell, Md Haris Iqbal)

- lightnvm NULL pointer deref fix (tangzhenhao)

- sr in_interrupt() removal (Sebastian Andrzej Siewior)

- FC endpoint security support for s390/dasd (Jan Höppner, Sebastian
Ott, Vineeth Vijayan). From the s390 arch guys, arch bits included
as it made it easier for them to funnel the feature through the
block driver tree.

- Follow up fixes (Colin Ian King)"

* tag 'for-5.11/drivers-2020-12-14' of git://git.kernel.dk/linux-block: (64 commits)
block: drop dead assignments in loop_init()
sr: Remove in_interrupt() usage in sr_init_command().
sr: Switch the sector size back to 2048 if sr_read_sector() changed it.
cdrom: Reset sector_size back it is not 2048.
drivers/lightnvm: fix a null-ptr-deref bug in pblk-core.c
null_blk: Move driver into its own directory
null_blk: Allow controlling max_hw_sectors limit
null_blk: discard zones on reset
null_blk: cleanup discard handling
null_blk: Improve implicit zone close
null_blk: improve zone locking
block: Align max_hw_sectors to logical blocksize
null_blk: Fail zone append to conventional zones
null_blk: Fix zone size initialization
bcache: fix race between setting bdev state to none and new write request direct to backing
block/rnbd: fix a null pointer dereference on dev->blk_symlink_name
block/rnbd-clt: Dynamically alloc buffer for pathname & blk_symlink_name
block/rnbd: call kobject_put in the failure path
Documentation/ABI/rnbd-srv: add document for force_close
block/rnbd-srv: close a mapped device from server side.
...

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Merge branch 'next' into for-linus

Prepare input updates for 5.11 merge window.

block/rnbd-clt: Dynamically alloc buffer for pathname & blk_symlink_name

For every rnbd_clt_dev, we alloc the pathname and blk_symlink_name
statically to NAME_MAX which is 255 bytes. In most of the

block/rnbd-clt: Dynamically alloc buffer for pathname & blk_symlink_name

For every rnbd_clt_dev, we alloc the pathname and blk_symlink_name
statically to NAME_MAX which is 255 bytes. In most of the cases we only
need less than 10 bytes, so 500 bytes per block device are wasted.

This commit dynamically allocates memory buffer for pathname and
blk_symlink_name.

Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Lutz Pogrell <lutz.pogrell@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge tag 'v5.9' into next

Sync up with mainline to bring in the latest DTS files.

Merge branch 'master' into for-next

Sync with Linus' branch in order to be able to apply fixups
of more recent patches.