Daniel Smith [Wed, 17 May 2023 21:32:32 +0000 (14:32 -0700)]
nvme-pci: Add quirk for Teamgroup MP33 SSD
Add a quirk for Teamgroup MP33 that reports duplicate ids for disk.
Signed-off-by: Daniel Smith <dansmith@ds.gy>
[kch: patch formatting]
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Daniel Smith <dansmith@ds.gy>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Maurizio Lombardi [Thu, 11 May 2023 11:07:41 +0000 (13:07 +0200)]
nvme: do not let the user delete a ctrl before a complete initialization
If a userspace application performes a "delete_controller" command
early during the ctrl initialization, the delete operation
may race against the init code and the kernel will crash.
nvme nvme5: Connect command failed: host path error
nvme nvme5: failed to connect queue: 0 ret=880
PF: supervisor write access in kernel mode
PF: error_code(0x0002) - not-present page
blk_mq_quiesce_queue+0x18/0x90
nvme_tcp_delete_ctrl+0x24/0x40 [nvme_tcp]
nvme_do_delete_ctrl+0x7f/0x8b [nvme_core]
nvme_sysfs_delete.cold+0x8/0xd [nvme_core]
kernfs_fop_write_iter+0x124/0x1b0
new_sync_write+0xff/0x190
vfs_write+0x1ef/0x280
Fix the crash by checking the NVME_CTRL_STARTED_ONCE bit;
if it's not set it means that the nvme controller is still
in the process of getting initialized and the kernel
will return an -EBUSY error to userspace.
Set the NVME_CTRL_STARTED_ONCE later in the nvme_start_ctrl()
function, after the controller start operation is completed.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Christoph Hellwig [Wed, 17 May 2023 07:53:45 +0000 (09:53 +0200)]
nvme-multipath: don't call blk_mark_disk_dead in nvme_mpath_remove_disk
nvme_mpath_remove_disk is called after del_gendisk, at which point a
blk_mark_disk_dead call doesn't make any sense.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Adrian Huang [Fri, 21 Apr 2023 08:08:00 +0000 (16:08 +0800)]
nvme-pci: clamp max_hw_sectors based on DMA optimized limitation
When running the fio test on a 448-core AMD server + a NVME disk,
a soft lockup or a hard lockup call trace is shown:
[soft lockup]
watchdog: BUG: soft lockup - CPU#126 stuck for 23s! [swapper/126:0]
RIP: 0010:_raw_spin_unlock_irqrestore+0x21/0x50
...
Call Trace:
<IRQ>
fq_flush_timeout+0x7d/0xd0
? __pfx_fq_flush_timeout+0x10/0x10
call_timer_fn+0x2e/0x150
run_timer_softirq+0x48a/0x560
? __pfx_fq_flush_timeout+0x10/0x10
? clockevents_program_event+0xaf/0x130
__do_softirq+0xf1/0x335
irq_exit_rcu+0x9f/0xd0
sysvec_apic_timer_interrupt+0xb4/0xd0
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1f/0x30
...
Obvisouly, fq_flush_timeout spends over 20 seconds. Here is ftrace log:
| fq_flush_timeout() {
| fq_ring_free() {
| put_pages_list() {
0.170 us | free_unref_page_list();
0.810 us | }
| free_iova_fast() {
| free_iova() {
* 85622.66 us | _raw_spin_lock_irqsave();
2.860 us | remove_iova();
0.600 us | _raw_spin_unlock_irqrestore();
0.470 us | lock_info_report();
2.420 us | free_iova_mem.part.0();
* 85638.27 us | }
* 85638.84 us | }
| put_pages_list() {
0.230 us | free_unref_page_list();
0.470 us | }
... ...
$
31017069 us | }
Most of cores are under lock contention for acquiring iova_rbtree_lock due
to the iova flush queue mechanism.
[hard lockup]
NMI watchdog: Watchdog detected hard LOCKUP on cpu 351
RIP: 0010:native_queued_spin_lock_slowpath+0x2d8/0x330
Call Trace:
<IRQ>
_raw_spin_lock_irqsave+0x4f/0x60
free_iova+0x27/0xd0
free_iova_fast+0x4d/0x1d0
fq_ring_free+0x9b/0x150
iommu_dma_free_iova+0xb4/0x2e0
__iommu_dma_unmap+0x10b/0x140
iommu_dma_unmap_sg+0x90/0x110
dma_unmap_sg_attrs+0x4a/0x50
nvme_unmap_data+0x5d/0x120 [nvme]
nvme_pci_complete_batch+0x77/0xc0 [nvme]
nvme_irq+0x2ee/0x350 [nvme]
? __pfx_nvme_pci_complete_batch+0x10/0x10 [nvme]
__handle_irq_event_percpu+0x53/0x1a0
handle_irq_event_percpu+0x19/0x60
handle_irq_event+0x3d/0x60
handle_edge_irq+0xb3/0x210
__common_interrupt+0x7f/0x150
common_interrupt+0xc5/0xf0
</IRQ>
<TASK>
asm_common_interrupt+0x2b/0x40
...
ftrace shows fq_ring_free spends over 10 seconds [1]. Again, most of
cores are under lock contention for acquiring iova_rbtree_lock due
to the iova flush queue mechanism.
[Root Cause]
The root cause is that the max_hw_sectors_kb of nvme disk (mdts=10)
is 4096kb, which streaming DMA mappings cannot benefit from the
scalable IOVA mechanism introduced by the commit
9257b4a206fc
("iommu/iova: introduce per-cpu caching to iova allocation") if
the length is greater than 128kb.
To fix the lock contention issue, clamp max_hw_sectors based on
DMA optimized limitation in order to leverage scalable IOVA mechanism.
Note: The issue does not happen with another NVME disk (mdts = 5
and max_hw_sectors_kb = 128)
[1] https://gist.github.com/AdrianHuang/
bf8ec7338204837631fbdaed25d19cc4
Suggested-by: Keith Busch <kbusch@kernel.org>
Reported-and-tested-by: Jiwei Sun <sunjw10@lenovo.com>
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Hristo Venev [Tue, 25 Apr 2023 19:58:54 +0000 (22:58 +0300)]
nvme-pci: add quirk for missing secondary temperature thresholds
On Kingston KC3000 and Kingston FURY Renegade (both have the same PCI
IDs) accessing temp3_{min,max} fails with an invalid field error (note
that there is no problem setting the thresholds for temp1).
This contradicts the NVM Express Base Specification 2.0b, page 292:
The over temperature threshold and under temperature threshold
features shall be implemented for all implemented temperature sensors
(i.e., all Temperature Sensor fields that report a non-zero value).
Define NVME_QUIRK_NO_SECONDARY_TEMP_THRESH that disables the thresholds
for all but the composite temperature and set it for this device.
Signed-off-by: Hristo Venev <hristo@venev.name>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Sagi Grimberg [Wed, 3 May 2023 15:57:33 +0000 (18:57 +0300)]
nvme-pci: add NVME_QUIRK_BOGUS_NID for HS-SSD-FUTURE 2048G
Add a quirk to fix HS-SSD-FUTURE 2048G SSD drives reporting duplicate
nsids.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217384
Reported-by: Andrey God <andreygod83@protonmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Jens Axboe [Sun, 30 Apr 2023 22:15:08 +0000 (16:15 -0600)]
mailmap: add mailmap entries for Jens Axboe
There's an old entry in there already, but update it and add fb/meta
and oracle entries as well.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tao Su [Fri, 28 Apr 2023 04:51:49 +0000 (12:51 +0800)]
block: Skip destroyed blkg when restart in blkg_destroy_all()
Kernel hang in blkg_destroy_all() when total blkg greater than
BLKG_DESTROY_BATCH_SIZE, because of not removing destroyed blkg in
blkg_list. So the size of blkg_list is same after destroying a
batch of blkg, and the infinite 'restart' occurs.
Since blkg should stay on the queue list until blkg_free_workfn(),
skip destroyed blkg when restart a new round, which will solve this
kernel hang issue and satisfy the previous will to restart.
Reported-by: Xiangfei Ma <xiangfeix.ma@intel.com>
Tested-by: Xiangfei Ma <xiangfeix.ma@intel.com>
Tested-by: Farrah Chen <farrah.chen@intel.com>
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Fixes: f1c006f1c685 ("blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()")
Suggested-and-reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20230428045149.1310073-1-tao1.su@linux.intel.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Maxim Korotkov [Thu, 19 Jan 2023 10:44:43 +0000 (13:44 +0300)]
writeback: fix call of incorrect macro
the variable 'history' is of type u16, it may be an error
that the hweight32 macro was used for it
I guess macro hweight16 should be used
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 2a81490811d0 ("writeback: implement foreign cgroup inode detection")
Signed-off-by: Maxim Korotkov <korotkov.maxim.s@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230119104443.3002-1-korotkov.maxim.s@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 28 Apr 2023 16:36:27 +0000 (10:36 -0600)]
Merge tag 'md-next-2023-04-28' of https://git./linux/kernel/git/song/md into for-6.4/block
Pull MD fixes from Song:
"1. Improve raid5 sequential IO performance on spinning disks, which fixes
a regression since v6.0, by Jan Kara.
2. Fix bitmap offset types, which fixes an issue introduced in this merge
window, by Jonathan Derrick."
* tag 'md-next-2023-04-28' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md: Fix bitmap offset type in sb writer
md/raid5: Improve performance for sequential IO
Jonathan Derrick [Tue, 25 Apr 2023 01:14:38 +0000 (19:14 -0600)]
md: Fix bitmap offset type in sb writer
Bitmap offset is allowed to be negative, indicating that bitmap precedes
metadata. Change the type back from sector_t to loff_t to satisfy
conditionals and calculations.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/linux-raid/CAPhsuW6HuaUJ5WcyPajVgUfkQFYp2D_cy1g6qxN4CU_gP2=z7g@mail.gmail.com/
Fixes: 10172f200b67 ("md: Fix types in sb writer")
Signed-off-by: Jonathan Derrick <jonathan.derrick@linux.dev>
Suggested-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230425011438.71046-1-jonathan.derrick@linux.dev
Jan Kara [Mon, 17 Apr 2023 17:15:37 +0000 (19:15 +0200)]
md/raid5: Improve performance for sequential IO
Commit
7e55c60acfbb ("md/raid5: Pivot raid5_make_request()") changed the
order in which requests for underlying disks are created. Since for
large sequential IO adding of requests frequently races with md_raid5
thread submitting bios to underlying disks, this results in a change in
IO pattern because intermediate states of new order of request creation
result in more smaller discontiguous requests. For RAID5 on top of three
rotational disks our performance testing revealed this results in
regression in write throughput:
iozone -a -s
131072000 -y 4 -q 8 -i 0 -i 1 -R
before
7e55c60acfbb:
KB reclen write rewrite read reread
131072000 4 493670 525964 524575 513384
131072000 8 540467 532880 512028 513703
after
7e55c60acfbb:
KB reclen write rewrite read reread
131072000 4 421785 456184 531278 509248
131072000 8 459283 456354 528449 543834
To reduce the amount of discontiguous requests we can start generating
requests with the stripe with the lowest chunk offset as that has the
best chance of being adjacent to IO queued previously. This improves the
performance to:
KB reclen write rewrite read reread
131072000 4 497682 506317 518043 514559
131072000 8 514048 501886 506453 504319
restoring big part of the regression.
Fixes: 7e55c60acfbb ("md/raid5: Pivot raid5_make_request()")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230417171537.17899-1-jack@suse.cz
Eric Blake [Mon, 10 Apr 2023 18:06:11 +0000 (13:06 -0500)]
docs nbd: userspace NBD now favors github over sourceforge
While the sourceforge site for userspace NBD still exists, the code
repository moved to github several years ago. Then with a recent
patch[1], the github landing page contains just as much information as
the sourceforge page, so we might as well point to a single location
that also provides the code.
[1] https://lists.debian.org/nbd/2023/03/msg00051.html
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230410180611.1051618-5-eblake@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Eric Blake [Mon, 10 Apr 2023 18:06:10 +0000 (13:06 -0500)]
block nbd: use req.cookie instead of req.handle
The NBD spec was recently changed [1] to refer to the opaque client
identifier as a 'cookie' rather than a 'handle', but has for a much
longer time listed it as a 64-bit value, and declares that all values
in the NBD protocol are sent in network byte order (big-endian).
Because the value is opaque to the server, it doesn't usually matter
what endianness we send as the client - as long as we are consistent
that either we byte-swap on both write and read, or on neither, then
we can match server replies back to our requests. That said, our
internal use of the cookie is as a 64-bit number (well, as two 32-bit
numbers concatenated together), rather than as 8 individual bytes; so
prior to this commit, we ARE leaking the native endianness of our
internals as a client out to the server. We don't know of any server
that will actually inspect the opaque value and behave differently
depending on whether a little-endian or big-endian client is sending
requests, but since we DO log the cookie value, a wireshark capture of
the network traffic is easier to correlate back to the kernel traffic
of a big-endian host (where the u64 and char[8] representations are
the same) than of a little-endian host (where if wireshark honors the
NBD spec and displays a u64 in network byte order, it is byte-swapped
from what the kernel logged).
The fix in this patch is thus two-part: it now consistently uses
network byte order for the opaque value (no difference to a big-endian
machine, but an extra byteswap on a little-endian machine; probably in
the noise compared to the overhead of network traffic in general), and
now uses a 64-bit integer instead of char[8] as its preferred access
to the opaque value (direct assignment instead of memcpy()).
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230410180611.1051618-4-eblake@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Eric Blake [Mon, 10 Apr 2023 18:06:09 +0000 (13:06 -0500)]
uapi nbd: add cookie alias to handle
The uapi <linux/nbd.h> header declares a 'char handle[8]' per request;
which is overloaded in English (are you referring to "handle" the
verb, such as handling a signal or writing a callback handler, or
"handle" the noun, the value used in a lookup table to correlate a
response back to the request). Many user-space NBD implementations
(both servers and clients) have instead used 'uint64_t cookie' or
similar, as it is easier to directly assign an integer than to futz
around with memcpy. In fact, upstream documentation is now
encouraging this shift in terminology:
https://github.com/NetworkBlockDevice/nbd/commit/
ca4392eb2b
Accomplish this by use of an anonymous union to provide the alias for
anyone getting the definition from the uapi; this does not break
existing clients, while exposing the nicer name for those who prefer
it. Note that block/nbd.c still uses the term handle (in fact, it
actually combines a 32-bit cookie and a 32-bit tag into the 64-bit
handle), but that internal usage is not changed by the public uapi,
since no compliant NBD server has any reason to inspect or alter the
64 bits sent over the socket.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230410180611.1051618-3-eblake@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Eric Blake [Mon, 10 Apr 2023 18:06:08 +0000 (13:06 -0500)]
uapi nbd: improve doc links to userspace spec
The uapi <linux/nbd.h> header intentionally documents only the NBD
server features that the kernel module will utilize as a client. But
while it already had one mention of skipped bits due to userspace
extensions, it did not actually direct the reader to the canonical
source to learn about those extensions.
While touching comments, fix an outdated reference that listed only
READ and WRITE as commands.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230410180611.1051618-2-eblake@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Thomas Weißschuh [Sat, 18 Mar 2023 17:36:25 +0000 (17:36 +0000)]
blk-integrity: register sysfs attributes on struct device
The "integrity" kobject only acted as a holder for static sysfs entries.
It also was embedded into struct gendisk without managing it, violating
assumptions of the driver core.
Instead register the sysfs entries directly onto the struct device.
Also drop the now unused member integrity_kobj from struct gendisk.
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20230309-kobj_release-gendisk_integrity-v3-3-ceccb4493c46@weissschuh.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Thomas Weißschuh [Sat, 18 Mar 2023 17:36:24 +0000 (17:36 +0000)]
blk-integrity: convert to struct device_attribute
An upcoming patch will register the integrity attributes directly with
the struct device kobject.
For this the attributes have to be implemented in terms of
struct device_attribute.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20230309-kobj_release-gendisk_integrity-v3-2-ceccb4493c46@weissschuh.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Thomas Weißschuh [Sat, 18 Mar 2023 17:36:23 +0000 (17:36 +0000)]
blk-integrity: use sysfs_emit
The correct way to emit data into sysfs is via sysfs_emit(), use it.
Also perform some trivial syntactic cleanups.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20230309-kobj_release-gendisk_integrity-v3-1-ceccb4493c46@weissschuh.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Chaitanya Kulkarni [Mon, 24 Apr 2023 23:46:28 +0000 (16:46 -0700)]
block/drivers: remove dead clear of random flag
QUEUE_FLAG_ADD_RANDOM is not set before we clear it for "null_blk",
"brd", "nbd", "zram", and "bcache" since by default we don't set
"QUEUE_FLAG_ADD_RANDOM" to MQ ops.
Remove dead clear of QUEUE_FLAG_ADD_RANDOM in above listed drivers.
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> #zram
Link: https://lore.kernel.org/r/20230424234628.45544-2-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Tue, 25 Apr 2023 03:41:54 +0000 (11:41 +0800)]
block: sync part's ->bd_has_submit_bio with disk's
submit_bio() always uses bio->bi_bdev->bd_has_submit_bio to decide if
disk's ->submit_bio() is called, and bio->bi_bdev could point to one
partition device.
So we have to sync part bdev's ->bd_has_submit_bio with disk's.
Reported-by: Changhui Zhong <czhong@redhat.com>
Link: https://lore.kernel.org/linux-block/ZEdItaPqif8fp85H@ovpn-8-24.pek2.redhat.com/T/#t
Fixes: 9f4107b07b17 ("block: store bdev->bd_disk->fops->submit_bio state in bdev")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230425034154.110099-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Damien Le Moal [Mon, 24 Apr 2023 13:13:18 +0000 (22:13 +0900)]
block: Cleanup set_capacity()/bdev_set_nr_sectors()
The code for setting a block device capacity (bd_nr_sectors field of
struct block_device) is duplicated in set_capacity() and
bdev_set_nr_sectors(). Clean this up by making bdev_set_nr_sectors()
a block layer internal function defined in block/bdev.c instead of
having this function statically defined in block/partitions/core.c.
With this change, set_capacity() implementation can be simplified to
only calling bdev_set_nr_sectors().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230424131318.79935-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Zhong Jinghua [Mon, 6 Feb 2023 14:58:05 +0000 (22:58 +0800)]
nbd: fix incomplete validation of ioctl arg
We tested and found an alarm caused by nbd_ioctl arg without verification.
The UBSAN warning calltrace like below:
UBSAN: Undefined behaviour in fs/buffer.c:1709:35
signed integer overflow:
-
9223372036854775808 - 1 cannot be represented in type 'long long int'
CPU: 3 PID: 2523 Comm: syz-executor.0 Not tainted 4.19.90 #1
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x0/0x3f0 arch/arm64/kernel/time.c:78
show_stack+0x28/0x38 arch/arm64/kernel/traps.c:158
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x170/0x1dc lib/dump_stack.c:118
ubsan_epilogue+0x18/0xb4 lib/ubsan.c:161
handle_overflow+0x188/0x1dc lib/ubsan.c:192
__ubsan_handle_sub_overflow+0x34/0x44 lib/ubsan.c:206
__block_write_full_page+0x94c/0xa20 fs/buffer.c:1709
block_write_full_page+0x1f0/0x280 fs/buffer.c:2934
blkdev_writepage+0x34/0x40 fs/block_dev.c:607
__writepage+0x68/0xe8 mm/page-writeback.c:2305
write_cache_pages+0x44c/0xc70 mm/page-writeback.c:2240
generic_writepages+0xdc/0x148 mm/page-writeback.c:2329
blkdev_writepages+0x2c/0x38 fs/block_dev.c:2114
do_writepages+0xd4/0x250 mm/page-writeback.c:2344
The reason for triggering this warning is __block_write_full_page()
-> i_size_read(inode) - 1 overflow.
inode->i_size is assigned in __nbd_ioctl() -> nbd_set_size() -> bytesize.
We think it is necessary to limit the size of arg to prevent errors.
Moreover, __nbd_ioctl() -> nbd_add_socket(), arg will be cast to int.
Assuming the value of arg is 0x80000000000000001) (on a 64-bit machine),
it will become 1 after the coercion, which will return unexpected results.
Fix it by adding checks to prevent passing in too large numbers.
Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230206145805.2645671-1-zhongjinghua@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Thu, 20 Apr 2023 09:11:04 +0000 (17:11 +0800)]
ublk: don't return 0 in case of any failure
Commit
2d786e66c966 ("block: ublk: switch to ioctl command encoding")
starts to reset local variable of 'ret' as zero, then if any failure
happens when handling the three IO commands, 0 can be returned to ublk
server.
Fix it by returning -EINVAL in case of command handling failure.
Cc: Christoph Hellwig <hch@lst.de>
Fixes: 2d786e66c966 ("block: ublk: switch to ioctl command encoding")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230420091104.1092972-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ondrej Kozina [Tue, 11 Apr 2023 09:09:31 +0000 (11:09 +0200)]
sed-opal: geometry feature reporting command
Locking range start and locking range length
attributes may be require to satisfy restrictions
exposed by OPAL2 geometry feature reporting.
Geometry reporting feature is described in TCG OPAL SSC,
section 3.1.1.4 (ALIGN, LogicalBlockSize, AlignmentGranularity
and LowestAlignedLBA).
4.3.5.2.1.1 RangeStart Behavior:
[ StartAlignment = (RangeStart modulo AlignmentGranularity) - LowestAlignedLBA ]
When processing a Set method or CreateRow method on the Locking
table for a non-Global Range row, if:
a) the AlignmentRequired (ALIGN above) column in the LockingInfo
table is TRUE;
b) RangeStart is non-zero; and
c) StartAlignment is non-zero, then the method SHALL fail and
return an error status code INVALID_PARAMETER.
4.3.5.2.1.2 RangeLength Behavior:
If RangeStart is zero, then
[ LengthAlignment = (RangeLength modulo AlignmentGranularity) - LowestAlignedLBA ]
If RangeStart is non-zero, then
[ LengthAlignment = (RangeLength modulo AlignmentGranularity) ]
When processing a Set method or CreateRow method on the Locking
table for a non-Global Range row, if:
a) the AlignmentRequired (ALIGN above) column in the LockingInfo
table is TRUE;
b) RangeLength is non-zero; and
c) LengthAlignment is non-zero, then the method SHALL fail and
return an error status code INVALID_PARAMETER
In userspace we stuck to logical block size reported by general
block device (via sysfs or ioctl), but we can not read
'AlignmentGranularity' or 'LowestAlignedLBA' anywhere else and
we need to get those values from sed-opal interface otherwise
we will not be able to report or avoid locking range setup
INVALID_PARAMETER errors above.
Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Tested-by: Milan Broz <gmazyland@gmail.com>
Link: https://lore.kernel.org/r/20230411090931.9193-2-okozina@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Chaitanya Kulkarni [Sun, 16 Apr 2023 22:03:39 +0000 (15:03 -0700)]
null_blk: Always check queue mode setting from configfs
Make sure to check device queue mode in the null_validate_conf() and
return error for NULL_Q_RQ as we don't allow legacy I/O path, without
this patch we get OOPs when queue mode is set to 1 from configfs,
following are repro steps :-
modprobe null_blk nr_devices=0
mkdir config/nullb/nullb0
echo 1 > config/nullb/nullb0/memory_backed
echo 4096 > config/nullb/nullb0/blocksize
echo 20480 > config/nullb/nullb0/size
echo 1 > config/nullb/nullb0/queue_mode
echo 1 > config/nullb/nullb0/power
Entering kdb (current=0xffff88810acdd080, pid 2372) on processor 42 Oops: (null)
due to oops @ 0xffffffffc041c329
CPU: 42 PID: 2372 Comm: sh Tainted: G O N 6.3.0-rc5lblk+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:null_add_dev.part.0+0xd9/0x720 [null_blk]
Code: 01 00 00 85 d2 0f 85 a1 03 00 00 48 83 bb 08 01 00 00 00 0f 85 f7 03 00 00 80 bb 62 01 00 00 00 48 8b 75 20 0f 85 6d 02 00 00 <48> 89 6e 60 48 8b 75 20 bf 06 00 00 00 e8 f5 37 2c c1 48 8b 75 20
RSP: 0018:
ffffc900052cbde0 EFLAGS:
00010246
RAX:
0000000000000001 RBX:
ffff88811084d800 RCX:
0000000000000001
RDX:
0000000000000000 RSI:
0000000000000000 RDI:
ffff888100042e00
RBP:
ffff8881053d8200 R08:
ffffc900052cbd68 R09:
ffff888105db2000
R10:
0000000000000001 R11:
0000000000000000 R12:
0000000000000002
R13:
ffff888104765200 R14:
ffff88810eec1748 R15:
ffff88810eec1740
FS:
00007fd445fd1740(0000) GS:
ffff8897dfc80000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
0000000000000060 CR3:
0000000166a00000 CR4:
0000000000350ee0
DR0:
ffffffff8437a488 DR1:
ffffffff8437a489 DR2:
ffffffff8437a48a
DR3:
ffffffff8437a48b DR6:
00000000ffff0ff0 DR7:
0000000000000400
Call Trace:
<TASK>
nullb_device_power_store+0xd1/0x120 [null_blk]
configfs_write_iter+0xb4/0x120
vfs_write+0x2ba/0x3c0
ksys_write+0x5f/0xe0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fd4460c57a7
Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:
00007ffd3792a4a8 EFLAGS:
00000246 ORIG_RAX:
0000000000000001
RAX:
ffffffffffffffda RBX:
0000000000000002 RCX:
00007fd4460c57a7
RDX:
0000000000000002 RSI:
000055b43c02e4c0 RDI:
0000000000000001
RBP:
000055b43c02e4c0 R08:
000000000000000a R09:
00007fd44615b4e0
R10:
00007fd44615b3e0 R11:
0000000000000246 R12:
0000000000000002
R13:
00007fd446198520 R14:
0000000000000002 R15:
00007fd446198700
</TASK>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Link: https://lore.kernel.org/r/20230416220339.43845-1-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Tue, 18 Apr 2023 13:18:10 +0000 (21:18 +0800)]
block: ublk: switch to ioctl command encoding
All ublk commands(control, IO) should have taken ioctl command encoding
from the beginning, because ioctl command encoding defines each code
uniquely, so driver can figure out wrong command sent from userspace
easily; 2) it might help security subsystem for audit uring cmd[1].
Unfortunately we didn't do that way, and it could be one lesson for
ublk driver.
So switch to ioctl command encoding now, we still support commands encoded
in old way, but they become legacy definition. Any new command should take
ioctl encoding.
See ublksrv code for switching to ioctl command encoding in [2].
[1] https://lore.kernel.org/io-uring/CAHC9VhSVzujW9LOj5Km80AjU0EfAuukoLrxO6BEfnXeK_s6bAg@mail.gmail.com/
[2] https://github.com/ming1/ubdsrv/commits/ioctl_cmd_encoding
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ken Kurematsu <k.kurematsu@nskint.co.jp>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230418131810.855959-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Sun, 16 Apr 2023 07:35:53 +0000 (09:35 +0200)]
blk-mq: fix the blk_mq_add_to_requeue_list call in blk_kick_flush
Commit
b12e5c6c755a accidentally changes blk_kick_flush to do a head
insert into the requeue list, fix this up.
Fixes: b12e5c6c755a ("blk-mq: pass a flags argument to blk_mq_add_to_requeue_list")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230416073553.966161-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Colin Ian King [Thu, 13 Apr 2023 13:30:09 +0000 (14:30 +0100)]
block, bfq: Fix division by zero error on zero wsum
When the weighted sum is zero the calculation of limit causes
a division by zero error. Fix this by continuing to the next level.
This was discovered by running as root:
stress-ng --ioprio 0
Fixes divison by error oops:
[ 521.450556] divide error: 0000 [#1] SMP NOPTI
[ 521.450766] CPU: 2 PID:
2684464 Comm: stress-ng-iopri Not tainted 6.2.1-1280.native #1
[ 521.451117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[ 521.451627] RIP: 0010:bfqq_request_over_limit+0x207/0x400
[ 521.451875] Code: 01 48 8d 0c c8 74 0b 48 8b 82 98 00 00 00 48 8d 0c c8 8b 85 34 ff ff ff 48 89 ca 41 0f af 41 50 48 d1 ea 48 98 48 01 d0 31 d2 <48> f7 f1 41 39 41 48 89 85 34 ff ff ff 0f 8c 7b 01 00 00 49 8b 44
[ 521.452699] RSP: 0018:
ffffb1af84eb3948 EFLAGS:
00010046
[ 521.452938] RAX:
000000000000003c RBX:
0000000000000000 RCX:
0000000000000000
[ 521.453262] RDX:
0000000000000000 RSI:
0000000000000000 RDI:
ffffb1af84eb3978
[ 521.453584] RBP:
ffffb1af84eb3a30 R08:
0000000000000001 R09:
ffff8f88ab8a4ba0
[ 521.453905] R10:
0000000000000000 R11:
0000000000000001 R12:
ffff8f88ab8a4b18
[ 521.454224] R13:
ffff8f8699093000 R14:
0000000000000001 R15:
ffffb1af84eb3970
[ 521.454549] FS:
00005640b6b0b580(0000) GS:
ffff8f88b3880000(0000) knlGS:
0000000000000000
[ 521.454912] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 521.455170] CR2:
00007ffcbcae4e38 CR3:
00000002e46de001 CR4:
0000000000770ee0
[ 521.455491] PKRU:
55555554
[ 521.455619] Call Trace:
[ 521.455736] <TASK>
[ 521.455837] ? bfq_request_merge+0x3a/0xc0
[ 521.456027] ? elv_merge+0x115/0x140
[ 521.456191] bfq_limit_depth+0xc8/0x240
[ 521.456366] __blk_mq_alloc_requests+0x21a/0x2c0
[ 521.456577] blk_mq_submit_bio+0x23c/0x6c0
[ 521.456766] __submit_bio+0xb8/0x140
[ 521.457236] submit_bio_noacct_nocheck+0x212/0x300
[ 521.457748] submit_bio_noacct+0x1a6/0x580
[ 521.458220] submit_bio+0x43/0x80
[ 521.458660] ext4_io_submit+0x23/0x80
[ 521.459116] ext4_do_writepages+0x40a/0xd00
[ 521.459596] ext4_writepages+0x65/0x100
[ 521.460050] do_writepages+0xb7/0x1c0
[ 521.460492] __filemap_fdatawrite_range+0xa6/0x100
[ 521.460979] file_write_and_wait_range+0xbf/0x140
[ 521.461452] ext4_sync_file+0x105/0x340
[ 521.461882] __x64_sys_fsync+0x67/0x100
[ 521.462305] ? syscall_exit_to_user_mode+0x2c/0x1c0
[ 521.462768] do_syscall_64+0x3b/0xc0
[ 521.463165] entry_SYSCALL_64_after_hwframe+0x5a/0xc4
[ 521.463621] RIP: 0033:0x5640b6c56590
[ 521.464006] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 80 3d 71 70 0e 00 00 74 17 b8 4a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20230413133009.1605335-1-colin.i.king@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Akinobu Mita [Sat, 15 Apr 2023 12:57:05 +0000 (21:57 +0900)]
fault-inject: fix build error when FAULT_INJECTION_CONFIGFS=y and CONFIGFS_FS=m
This fixes a build error when CONFIG_FAULT_INJECTION_CONFIGFS=y and
CONFIG_CONFIGFS_FS=m.
Since the fault-injection library cannot built as a module, avoid building
configfs as a module.
Fixes: 4668c7a2940d ("fault-inject: allow configuration via configfs")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304150025.K0hczLR4-lkp@intel.com/
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 14 Apr 2023 13:32:02 +0000 (07:32 -0600)]
block: store bdev->bd_disk->fops->submit_bio state in bdev
We have a long chain of memory dereferencing just to whether or not
this disk has a special submit_bio helper. As that's not necessarily
the common case, add a bd_has_submit_bio state in the bdev to avoid
traversing this memory dependency chain if we don't need to.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 14 Apr 2023 13:30:16 +0000 (07:30 -0600)]
block: re-arrange the struct block_device fields for better layout
This moves struct device out-of-line as it's just used at open/close
time, so we can keep some of the commonly used fields closer together.
On a standard setup, it also reduces the size from 864 bytes to 848
bytes. Yes, struct device is a pig...
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 14 Apr 2023 12:32:44 +0000 (06:32 -0600)]
Merge branch 'md-next' of https://git./linux/kernel/git/song/md into for-6.4/block
Pull MD updates from Song:
"- md/bitmap: Optimal last page size, by Jon Derrick
- Various raid10 fixes, by Yu Kuai and Li Nan
- md: add error_handlers for raid0 and linear, by Mariusz Tkaczyk"
* 'md-next' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md/raid5: remove unused working_disks variable
md/raid10: don't call bio_start_io_acct twice for bio which experienced read error
md/raid10: fix memleak of md thread
md/raid10: fix memleak for 'conf->bio_split'
md/raid10: fix leak of 'r10bio->remaining' for recovery
md/raid10: don't BUG_ON() in raise_barrier()
md: fix soft lockup in status_resync
md: add error_handlers for raid0 and linear
md: Use optimal I/O size for last bitmap page
md: Fix types in sb writer
md: Move sb writer loop to its own function
md/raid10: Fix typo in comment (replacment -> replacement)
md: make kobj_type structures constant
md/raid10: fix null-ptr-deref in raid10_sync_request
md/raid10: fix task hung in raid10d
Jens Axboe [Fri, 14 Apr 2023 12:31:29 +0000 (06:31 -0600)]
Merge tag 'nvme-6.4-2023-04-14' of git://git.infradead.org/nvme into for-6.4/block
Pull NVMe updates from Christoph:
"nvme updates for Linux 6.4
- drop redundant pci_enable_pcie_error_reporting (Bjorn Helgaas)
- validate nvmet module parameters (Chaitanya Kulkarni)
- fence TCP socket on receive error (Chris Leech)
- fix async event trace event (Keith Busch)
- minor cleanups (Chaitanya Kulkarni, zhenwei pi)
- fix and cleanup nvmet Identify handling (Damien Le Moal,
Christoph Hellwig)
- fix double blk_mq_complete_request race in the timeout handler
(Lei Yin)
- fix irq locking in nvme-fcloop (Ming Lei)
- remove queue mapping helper for rdma devices (Sagi Grimberg)"
* tag 'nvme-6.4-2023-04-14' of git://git.infradead.org/nvme:
nvme-fcloop: fix "inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage"
blk-mq-rdma: remove queue mapping helper for rdma devices
nvme-rdma: minor cleanup in nvme_rdma_create_cq()
nvme: fix double blk_mq_complete_request for timeout request with low probability
nvme: fix async event trace event
nvme-apple: return directly instead of else
nvme-apple: return directly instead of else
nvmet-tcp: validate idle poll modparam value
nvmet-tcp: validate so_priority modparam value
nvme-tcp: fence TCP socket on receive error
nvmet: remove nvmet_req_cns_error_complete
nvmet: rename nvmet_execute_identify_cns_cs_ns
nvmet: fix Identify Identification Descriptor List handling
nvmet: cleanup nvmet_execute_identify()
nvmet: fix I/O Command Set specific Identify Controller
nvmet: fix Identify Active Namespace ID list handling
nvmet: fix Identify Controller handling
nvmet: fix Identify Namespace handling
nvmet: fix error handling in nvmet_execute_identify_cns_cs_ns()
nvme-pci: drop redundant pci_enable_pcie_error_reporting()
Tom Rix [Mon, 27 Mar 2023 13:23:24 +0000 (09:23 -0400)]
md/raid5: remove unused working_disks variable
clang with W=1 reports
drivers/md/raid5.c:7719:6: error: variable 'working_disks'
set but not used [-Werror,-Wunused-but-set-variable]
int working_disks = 0;
^
This variable is not used so remove it.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230327132324.1769595-1-trix@redhat.com
Yu Kuai [Tue, 14 Mar 2023 01:22:58 +0000 (09:22 +0800)]
md/raid10: don't call bio_start_io_acct twice for bio which experienced read error
handle_read_error() will resumit r10_bio by raid10_read_request(), which
will call bio_start_io_acct() again, while bio_end_io_acct() will only
be called once.
Fix the problem by don't account io again from handle_read_error().
Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting")
Suggested-by: Song Liu <song@kernel.org>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230314012258.2395894-1-yukuai1@huaweicloud.com
Yu Kuai [Fri, 10 Mar 2023 07:38:55 +0000 (15:38 +0800)]
md/raid10: fix memleak of md thread
In raid10_run(), if setup_conf() succeed and raid10_run() failed before
setting 'mddev->thread', then in the error path 'conf->thread' is not
freed.
Fix the problem by setting 'mddev->thread' right after setup_conf().
Fixes: 43a521238aca ("md-cluster: choose correct label when clustered layout is not supported")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230310073855.1337560-7-yukuai1@huaweicloud.com
Yu Kuai [Fri, 10 Mar 2023 07:38:54 +0000 (15:38 +0800)]
md/raid10: fix memleak for 'conf->bio_split'
In the error path of raid10_run(), 'conf' need be freed, however,
'conf->bio_split' is missed and memory will be leaked.
Since there are 3 places to free 'conf', factor out a helper to fix the
problem.
Fixes: fc9977dd069e ("md/raid10: simplify the splitting of requests.")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230310073855.1337560-6-yukuai1@huaweicloud.com
Yu Kuai [Fri, 10 Mar 2023 07:38:53 +0000 (15:38 +0800)]
md/raid10: fix leak of 'r10bio->remaining' for recovery
raid10_sync_request() will add 'r10bio->remaining' for both rdev and
replacement rdev. However, if the read io fails, recovery_request_write()
returns without issuing the write io, in this case, end_sync_request()
is only called once and 'remaining' is leaked, cause an io hang.
Fix the problem by decreasing 'remaining' according to if 'bio' and
'repl_bio' is valid.
Fixes: 24afd80d99f8 ("md/raid10: handle recovery of replacement devices.")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230310073855.1337560-5-yukuai1@huaweicloud.com
Yu Kuai [Fri, 10 Mar 2023 07:38:52 +0000 (15:38 +0800)]
md/raid10: don't BUG_ON() in raise_barrier()
If raise_barrier() is called the first time in raid10_sync_request(), which
means the first non-normal io is handled, raise_barrier() should wait for
all dispatched normal io to be done. This ensures that normal io won't
starve.
However, BUG_ON() if this is broken is too aggressive. This patch replace
BUG_ON() with WARN and fall back to not force.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230310073855.1337560-4-yukuai1@huaweicloud.com
Yu Kuai [Fri, 10 Mar 2023 07:38:51 +0000 (15:38 +0800)]
md: fix soft lockup in status_resync
status_resync() will calculate 'curr_resync - recovery_active' to show
user a progress bar like following:
[============>........] resync = 61.4%
'curr_resync' and 'recovery_active' is updated in md_do_sync(), and
status_resync() can read them concurrently, hence it's possible that
'curr_resync - recovery_active' can overflow to a huge number. In this
case status_resync() will be stuck in the loop to print a large amount
of '=', which will end up soft lockup.
Fix the problem by setting 'resync' to MD_RESYNC_ACTIVE in this case,
this way resync in progress will be reported to user.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230310073855.1337560-3-yukuai1@huaweicloud.com
Mariusz Tkaczyk [Mon, 6 Mar 2023 13:03:17 +0000 (14:03 +0100)]
md: add error_handlers for raid0 and linear
After the commit
9631abdbf406c("md: Set MD_BROKEN for RAID1 and RAID10")
MD_BROKEN must be set if array is failed because state_store() checks it.
If it is set then -EBUSY is returned to userspace.
For raid0 and linear MD_BROKEN is not set by error_handler(). As a result
mdadm is unable to trigger clean-up actions. It is a regression.
This patch adds appropriate error_handler for raid0 and linear. The
error handler sets MD_BROKEN for this device.
Reviewed-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230306130317.3418-1-mariusz.tkaczyk@linux.intel.com
Jon Derrick [Fri, 24 Feb 2023 18:33:23 +0000 (11:33 -0700)]
md: Use optimal I/O size for last bitmap page
If the bitmap space has enough room, size the I/O for the last bitmap
page write to the optimal I/O size for the storage device. The expanded
write is checked that it won't overrun the data or metadata.
The drive this was tested against has higher latencies when there are
sub-4k writes due to device-side read-mod-writes of its atomic 4k write
unit. This change helps increase performance by sizing the last bitmap
page I/O for the device's preferred write unit, if it is given.
Example Intel/Solidigm P5520
Raid10, Chunk-size 64M, bitmap-size 57228 bits
$ mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/nvme{0,1,2,3}n1
--assume-clean --bitmap=internal --bitmap-chunk=64M
$ fio --name=test --direct=1 --filename=/dev/md0 --rw=randwrite --bs=4k --runtime=60
Without patch:
write: IOPS=1676, BW=6708KiB/s (6869kB/s)(393MiB/60001msec); 0 zone resets
With patch:
write: IOPS=15.7k, BW=61.4MiB/s (64.4MB/s)(3683MiB/60001msec); 0 zone resets
Biosnoop:
Without patch:
Time Process PID Device LBA Size Lat
1.410377 md0_raid10 6900 nvme0n1 W 16 4096 0.02
1.410387 md0_raid10 6900 nvme2n1 W 16 4096 0.02
1.410374 md0_raid10 6900 nvme3n1 W 16 4096 0.01
1.410381 md0_raid10 6900 nvme1n1 W 16 4096 0.02
1.410411 md0_raid10 6900 nvme1n1 W
115346512 4096 0.01
1.410418 md0_raid10 6900 nvme0n1 W
115346512 4096 0.02
1.410915 md0_raid10 6900 nvme2n1 W 24 3584 0.43 <--
1.410935 md0_raid10 6900 nvme3n1 W 24 3584 0.45 <--
1.411124 md0_raid10 6900 nvme1n1 W 24 3584 0.64 <--
1.411147 md0_raid10 6900 nvme0n1 W 24 3584 0.66 <--
1.411176 md0_raid10 6900 nvme3n1 W
2019022184 4096 0.01
1.411189 md0_raid10 6900 nvme2n1 W
2019022184 4096 0.02
With patch:
Time Process PID Device LBA Size Lat
5.747193 md0_raid10 727 nvme0n1 W 16 4096 0.01
5.747192 md0_raid10 727 nvme1n1 W 16 4096 0.02
5.747195 md0_raid10 727 nvme3n1 W 16 4096 0.01
5.747202 md0_raid10 727 nvme2n1 W 16 4096 0.02
5.747229 md0_raid10 727 nvme3n1 W
1196223704 4096 0.02
5.747224 md0_raid10 727 nvme0n1 W
1196223704 4096 0.01
5.747279 md0_raid10 727 nvme0n1 W 24 4096 0.01 <--
5.747279 md0_raid10 727 nvme1n1 W 24 4096 0.02 <--
5.747284 md0_raid10 727 nvme3n1 W 24 4096 0.02 <--
5.747291 md0_raid10 727 nvme2n1 W 24 4096 0.02 <--
5.747314 md0_raid10 727 nvme2n1 W
2234636712 4096 0.01
5.747317 md0_raid10 727 nvme1n1 W
2234636712 4096 0.02
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jon Derrick <jonathan.derrick@linux.dev>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230224183323.638-4-jonathan.derrick@linux.dev
Jon Derrick [Fri, 24 Feb 2023 18:33:22 +0000 (11:33 -0700)]
md: Fix types in sb writer
Page->index is a pgoff_t and multiplying could cause overflows on a
32-bit architecture. In the sb writer, this is used to calculate and
verify the sector being used, and is multiplied by a sector value. Using
sector_t will cast it to a u64 type and is the more appropriate type for
the unit. Additionally, the integer size unit is converted to a sector
unit in later calculations, and is now corrected to be an unsigned type.
Finally, clean up the calculations using variable aliases to improve
readabiliy.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jon Derrick <jonathan.derrick@linux.dev>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230224183323.638-3-jonathan.derrick@linux.dev
Jon Derrick [Fri, 24 Feb 2023 18:33:21 +0000 (11:33 -0700)]
md: Move sb writer loop to its own function
Preparatory patch for optimal I/O size calculation. Move the sb writer
loop routine into its own function for clarity.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jon Derrick <jonathan.derrick@linux.dev>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230224183323.638-2-jonathan.derrick@linux.dev
Jiangshan Yi [Tue, 14 Feb 2023 06:40:13 +0000 (14:40 +0800)]
md/raid10: Fix typo in comment (replacment -> replacement)
Replace replacment with replacement.
Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230214064013.2373851-1-yijiangshan@kylinos.cn
Thomas Weißschuh [Tue, 14 Feb 2023 03:19:22 +0000 (03:19 +0000)]
md: make kobj_type structures constant
Since commit
ee6d3dd4ed48 ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.
Take advantage of this to constify the structure definitions to prevent
modification at runtime.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230214-kobj_type-md-v1-1-d6853f707f11@weissschuh.net
Li Nan [Wed, 22 Feb 2023 04:10:00 +0000 (12:10 +0800)]
md/raid10: fix null-ptr-deref in raid10_sync_request
init_resync() inits mempool and sets conf->have_replacemnt at the beginning
of sync, close_sync() frees the mempool when sync is completed.
After [1] recovery might be skipped and init_resync() is called but
close_sync() is not. null-ptr-deref occurs with r10bio->dev[i].repl_bio.
The following is one way to reproduce the issue.
1) create a array, wait for resync to complete, mddev->recovery_cp is set
to MaxSector.
2) recovery is woken and it is skipped. conf->have_replacement is set to
0 in init_resync(). close_sync() not called.
3) some io errors and rdev A is set to WantReplacement.
4) a new device is added and set to A's replacement.
5) recovery is woken, A have replacement, but conf->have_replacemnt is
0. r10bio->dev[i].repl_bio will not be alloced and null-ptr-deref
occurs.
Fix it by not calling init_resync() if recovery skipped.
[1] commit
7e83ccbecd60 ("md/raid10: Allow skipping recovery when clean arrays are assembled")
Fixes: 7e83ccbecd60 ("md/raid10: Allow skipping recovery when clean arrays are assembled")
Cc: stable@vger.kernel.org
Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230222041000.3341651-3-linan666@huaweicloud.com
Li Nan [Wed, 22 Feb 2023 04:09:59 +0000 (12:09 +0800)]
md/raid10: fix task hung in raid10d
commit
fe630de009d0 ("md/raid10: avoid deadlock on recovery.") allowed
normal io and sync io to exist at the same time. Task hung will occur as
below:
T1 T2 T3 T4
raid10d
handle_read_error
allow_barrier
conf->nr_pending--
-> 0
//submit sync io
raid10_sync_request
raise_barrier
->will not be blocked
...
//submit to drivers
raid10_read_request
wait_barrier
conf->nr_pending++
-> 1
//retry read fail
raid10_end_read_request
reschedule_retry
add to retry_list
conf->nr_queued++
-> 1
//sync io fail
end_sync_read
__end_sync_read
reschedule_retry
add to retry_list
conf->nr_queued++
-> 2
...
handle_read_error
get form retry_list
conf->nr_queued--
freeze_array
wait nr_pending == nr_queued+1
->1 ->2
//task hung
retry read and sync io will be added to retry_list(nr_queued->2) if they
fails. raid10d() called handle_read_error() and hung in freeze_array().
nr_queued will not decrease because raid10d is blocked, nr_pending will
not increase because conf->barrier is not released.
Fix it by moving allow_barrier() after raid10_read_request().
raise_barrier() will wait for nr_waiting to become 0. Therefore, sync io
and regular io will not be issued at the same time.
Also remove the check of nr_queued in stop_waiting_barrier. It can be 0
but don't need to be blocking. Remove the check for MD_RECOVERY_RUNNING as
the check is redundent.
Fixes: fe630de009d0 ("md/raid10: avoid deadlock on recovery.")
Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230222041000.3341651-2-linan666@huaweicloud.com
Akinobu Mita [Mon, 27 Mar 2023 14:37:33 +0000 (23:37 +0900)]
block: null_blk: make fault-injection dynamically configurable per device
The null_blk driver has multiple driver-specific fault injection
mechanisms. Each fault injection configuration can only be specified by a
module parameter and cannot be reconfigured without reloading the driver.
Also, each configuration is common to all devices and is initialized every
time a new device is added.
This change adds the following subdirectories for each null_blk device.
/sys/kernel/config/nullb/<disk>/timeout_inject
/sys/kernel/config/nullb/<disk>/requeue_inject
/sys/kernel/config/nullb/<disk>/init_hctx_fault_inject
Each fault injection attribute can be dynamically set per device by a
corresponding file in these directories.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Link: https://lore.kernel.org/r/20230327143733.14599-3-akinobu.mita@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Akinobu Mita [Mon, 27 Mar 2023 14:37:32 +0000 (23:37 +0900)]
fault-inject: allow configuration via configfs
This provides a helper function to allow configuration of fault-injection
for configfs-based drivers.
The config items created by this function have the same interface as the
one created under debugfs by fault_create_debugfs_attr().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Link: https://lore.kernel.org/r/20230327143733.14599-2-akinobu.mita@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:06:51 +0000 (08:06 +0200)]
blk-mq: remove __blk_mq_run_hw_queue
__blk_mq_run_hw_queue just contains a WARN_ON_ONCE for calls from
interrupt context and a blk_mq_run_dispatch_ops-protected call to
blk_mq_sched_dispatch_requests. Open code the call to
blk_mq_sched_dispatch_requests in both callers, and move the WARN_ON_ONCE
to blk_mq_run_hw_queue where it can be extended to all !async calls,
while the other call is from workqueue context and thus obviously does
not need the assert.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:06:50 +0000 (08:06 +0200)]
blk-mq: move the !async handling out of __blk_mq_delay_run_hw_queue
Only blk_mq_run_hw_queue can call __blk_mq_delay_run_hw_queue with
async=false, so move the handling there.
With this __blk_mq_delay_run_hw_queue can be merged into
blk_mq_delay_run_hw_queue.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:06:49 +0000 (08:06 +0200)]
blk-mq: move the blk_mq_hctx_stopped check in __blk_mq_delay_run_hw_queue
For the in-context dispatch, blk_mq_hctx_stopped is alredy checked in
blk_mq_sched_dispatch_requests under blk_mq_run_dispatch_ops() protection.
For the async dispatch case having a check before scheduling the work
still makes sense to avoid needless workqueue scheduling, so just keep it
for that case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:06:48 +0000 (08:06 +0200)]
blk-mq: remove the blk_mq_hctx_stopped check in blk_mq_run_work_fn
blk_mq_hctx_stopped is already checked in blk_mq_sched_dispatch_requests
under blk_mq_run_dispatch_ops() protection, so remove the duplicate check.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:06:47 +0000 (08:06 +0200)]
blk-mq: cleanup __blk_mq_sched_dispatch_requests
__blk_mq_sched_dispatch_requests currently has duplicated logic
for the cases where requests are on the hctx dispatch list or not.
Merge the two with a new need_dispatch variable and remove a few
pointless local variables.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:57 +0000 (08:40 +0200)]
blk-mq: pass a flags argument to blk_mq_add_to_requeue_list
Replace the boolean at_head argument with the same flags that are already
passed to blk_mq_insert_request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-21-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:56 +0000 (08:40 +0200)]
blk-mq: pass a flags argument to elevator_type->insert_requests
Instead of passing a bool at_head, pass down the full flags from the
blk_mq_insert_request interface.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-20-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:55 +0000 (08:40 +0200)]
blk-mq: pass a flags argument to blk_mq_request_bypass_insert
Replace the boolean at_head argument with the same flags that are already
passed to blk_mq_insert_request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-19-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:54 +0000 (08:40 +0200)]
blk-mq: pass a flags argument to blk_mq_insert_request
Replace the at_head bool with a flags argument that so far only contains
a single BLK_MQ_INSERT_AT_HEAD value. This makes it much easier to grep
for head insertions into the blk-mq dispatch queues.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-18-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:53 +0000 (08:40 +0200)]
blk-mq: don't kick the requeue_list in blk_mq_add_to_requeue_list
blk_mq_add_to_requeue_list takes a bool parameter to control how to kick
the requeue list at the end of the function. Move the call to
blk_mq_kick_requeue_list to the callers that want it instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-17-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:52 +0000 (08:40 +0200)]
blk-mq: don't run the hw_queue from blk_mq_request_bypass_insert
blk_mq_request_bypass_insert takes a bool parameter to control how to run
the queue at the end of the function. Move the blk_mq_run_hw_queue call
to the callers that want it instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-16-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:51 +0000 (08:40 +0200)]
blk-mq: don't run the hw_queue from blk_mq_insert_request
blk_mq_insert_request takes two bool parameters to control how to run
the queue at the end of the function. Move the blk_mq_run_hw_queue call
to the callers that want it instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:50 +0000 (08:40 +0200)]
blk-mq: fold __blk_mq_try_issue_directly into its two callers
Due to the wildly different behavior based on the bypass_insert argument,
not a whole lot of code in __blk_mq_try_issue_directly is actually shared
between blk_mq_try_issue_directly and blk_mq_request_issue_directly.
Remove __blk_mq_try_issue_directly and fold the code into the two callers
instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-14-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:49 +0000 (08:40 +0200)]
blk-mq: factor out a blk_mq_get_budget_and_tag helper
Factor out a helper from __blk_mq_try_issue_directly in preparation
of folding that function into its two callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-13-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:48 +0000 (08:40 +0200)]
blk-mq: refactor the DONTPREP/SOFTBARRIER andling in blk_mq_requeue_work
Split the RQF_DONTPREP and RQF_SOFTBARRIER in separate branches to make
the code more readable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:47 +0000 (08:40 +0200)]
blk-mq: refactor passthrough vs flush handling in blk_mq_insert_request
While both passthrough and flush requests call directly into
blk_mq_request_bypass_insert, the parameters aren't the same.
Split the handling into two separate conditionals and turn the whole
function into an if/elif/elif/else flow instead of the gotos.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:46 +0000 (08:40 +0200)]
blk-mq: remove blk_flush_queue_rq
Just call blk_mq_add_to_requeue_list directly from the two callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:45 +0000 (08:40 +0200)]
blk-mq: fold __blk_mq_insert_req_list into blk_mq_insert_request
Remove this very small helper and fold it into the only caller.
Note that this moves the trace_block_rq_insert out of ctx->lock, matching
the other calls to this tracepoint.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:44 +0000 (08:40 +0200)]
blk-mq: fold __blk_mq_insert_request into blk_mq_insert_request
There is no good point in keeping the __blk_mq_insert_request around
for two function calls and a singler caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:43 +0000 (08:40 +0200)]
blk-mq: move blk_mq_sched_insert_request to blk-mq.c
blk_mq_sched_insert_request is the main request insert helper and not
directly I/O scheduler related. Move blk_mq_sched_insert_request to
blk-mq.c, rename it to blk_mq_insert_request and mark it static.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:42 +0000 (08:40 +0200)]
blk-mq: fold blk_mq_sched_insert_requests into blk_mq_dispatch_plug_list
blk_mq_dispatch_plug_list is the only caller of
blk_mq_sched_insert_requests, and it makes sense to just fold it there
as blk_mq_sched_insert_requests isn't specific to I/O schedulers despite
the name.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:41 +0000 (08:40 +0200)]
blk-mq: move more logic into blk_mq_insert_requests
Move all logic related to the direct insert (including the call to
blk_mq_run_hw_queue) into blk_mq_insert_requests to streamline the code
flow up a bit, and to allow marking blk_mq_try_issue_list_directly
static.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:40 +0000 (08:40 +0200)]
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
block/blk-mq.h needs various definitions from <linux/blk-mq.h>,
include it there instead of relying on the source files to include
both.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:39 +0000 (08:40 +0200)]
blk-mq: remove blk-mq-tag.h
blk-mq-tag.h is always included by blk-mq.h, and causes recursive
inclusion hell with further changes. Just merge it into blk-mq.h
instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 13 Apr 2023 06:40:38 +0000 (08:40 +0200)]
blk-mq: don't plug for head insertions in blk_execute_rq_nowait
Plugs never insert at head, so don't plug for head insertions.
Fixes: 1c2d2fff6dc0 ("block: wire-up support for passthrough plugging")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Chengming Zhou [Thu, 13 Apr 2023 06:28:05 +0000 (14:28 +0800)]
blk-throttle: only enable blk-stat when BLK_DEV_THROTTLING_LOW
blk_throtl_register() will unconditionally enable blk-stat for gendisk
when register, even when we have no BLK_DEV_THROTTLING_LOW config.
Since the kernel always has only BLK_DEV_THROTTLING config and the
BLK_DEV_THROTTLING_LOW config is still in EXPERIMENTAL state, we can
just skip blk-stat when !BLK_DEV_THROTTLING_LOW.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230413062805.2081970-2-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Chengming Zhou [Thu, 13 Apr 2023 06:28:04 +0000 (14:28 +0800)]
blk-stat: fix QUEUE_FLAG_STATS clear
We need to set QUEUE_FLAG_STATS for two cases:
1. blk_stat_enable_accounting()
2. blk_stat_add_callback()
So we should clear it only when ((q->stats->accounting == 0) &&
list_empty(&q->stats->callbacks)).
blk_stat_disable_accounting() only check if q->stats->accounting
is 0 before clear the flag, this patch fix it.
Also add list_empty(&q->stats->callbacks)) check when enable, or
the flag is already set.
The bug can be reproduced on kernel without BLK_DEV_THROTTLING
(since it unconditionally enable accounting, see the next patch).
# cat /sys/block/sr0/queue/scheduler
none mq-deadline [bfq]
# cat /sys/kernel/debug/block/sr0/state
SAME_COMP|IO_STAT|INIT_DONE|STATS|REGISTERED|NOWAIT|30
# echo none > /sys/block/sr0/queue/scheduler
# cat /sys/kernel/debug/block/sr0/state
SAME_COMP|IO_STAT|INIT_DONE|REGISTERED|NOWAIT
# cat /sys/block/sr0/queue/wbt_lat_usec
75000
We can see that after changing elevator from "bfq" to "none",
"STATS" flag is lost even though WBT callback still need it.
Fixes: 68497092bde9 ("block: make queue stat accounting a reference")
Cc: <stable@vger.kernel.org> # v5.17+
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230413062805.2081970-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Thu, 13 Apr 2023 00:06:49 +0000 (14:06 -1000)]
blk-iolatency: Make initialization lazy
Other rq_qos policies such as wbt and iocost are lazy-initialized when they
are configured for the first time for the device but iolatency is
initialized unconditionally from blkcg_init_disk() during gendisk init. Lazy
init is beneficial because rq_qos policies add runtime overhead when
initialized as every IO has to walk all registered rq_qos callbacks.
This patch switches iolatency to lazy initialization too so that it only
registered its rq_qos policy when it is first configured.
Note that there is a known race condition between blkcg config file writes
and del_gendisk() and this patch makes iolatency susceptible to it by
exposing the init path to race against the deletion path. However, that
problem already exists in iocost and is being worked on.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230413000649.115785-5-tj@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Thu, 13 Apr 2023 00:06:48 +0000 (14:06 -1000)]
blk-iolatency: s/blkcg_rq_qos/iolat_rq_qos/
The name was too generic given that there are multiple blkcg rq-qos
policies.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20230413000649.115785-4-tj@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Thu, 13 Apr 2023 00:06:47 +0000 (14:06 -1000)]
blkcg: Restructure blkg_conf_prep() and friends
We want to support lazy init of rq-qos policies so that iolatency is enabled
lazily on configuration instead of gendisk initialization. The way blkg
config helpers are structured now is a bit awkward for that. Let's
restructure:
* blkcg_conf_open_bdev() is renamed to blkg_conf_open_bdev(). The blkcg_
prefix was used because the bdev opening step is blkg-independent.
However, the distinction is too subtle and confuses more than helps. Let's
switch to blkg prefix so that it's consistent with the type and other
helper names.
* struct blkg_conf_ctx now remembers the original input string and is always
initialized by the new blkg_conf_init().
* blkg_conf_open_bdev() is updated to take a pointer to blkg_conf_ctx like
blkg_conf_prep() and can be called multiple times safely. Instead of
modifying the double pointer to input string directly,
blkg_conf_open_bdev() now sets blkg_conf_ctx->body.
* blkg_conf_finish() is renamed to blkg_conf_exit() for symmetry and now
must be called on all blkg_conf_ctx's which were initialized with
blkg_conf_init().
Combined, this allows the users to either open the bdev first or do it
altogether with blkg_conf_prep() which will help implementing lazy init of
rq-qos policies.
blkg_conf_init/exit() will also be used implement synchronization against
device removal. This is necessary because iolat / iocost are configured
through cgroupfs instead of one of the files under /sys/block/DEVICE. As
cgroupfs operations aren't synchronized with block layer, the lazy init and
other configuration operations may race against device removal. This patch
makes blkg_conf_init/exit() used consistently for all cgroup-orginating
configurations making them a good place to implement explicit
synchronization.
Users are updated accordingly. No behavior change is intended by this patch.
v2: bfq wasn't updated in v1 causing a build error. Fixed.
v3: Update the description to include future use of blkg_conf_init/exit() as
synchronization points.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Yu Kuai <yukuai1@huaweicloud.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230413000649.115785-3-tj@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Thu, 13 Apr 2023 00:06:46 +0000 (14:06 -1000)]
blkcg: Drop unnecessary RCU read [un]locks from blkg_conf_prep/finish()
Now that all RCU flavors have been combined either holding a spin lock,
disabling irq or disabling preemption implies RCU read lock, so there's no
need to use rcu_read_[un]lock() explicitly while holding queue_lock. This
shouldn't cause any behavior changes.
v2: Description updated. Leave __acquires/release on queue_lock alone.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230413000649.115785-2-tj@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Wed, 12 Apr 2023 08:49:04 +0000 (16:49 +0800)]
nvme-fcloop: fix "inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage"
fcloop_fcp_op() could be called from flush request's ->end_io(flush_end_io) in
which the spinlock of fq->mq_flush_lock is grabbed with irq saved/disabled.
So fcloop_fcp_op() can't call spin_unlock_irq(&tfcp_req->reqlock) simply
which enables irq unconditionally.
Fixes the warning by switching to spin_lock_irqsave()/spin_unlock_irqrestore()
Fixes: c38dbbfab1bc ("nvme-fcloop: fix inconsistent lock state warnings")
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Sagi Grimberg [Wed, 22 Mar 2023 12:37:03 +0000 (14:37 +0200)]
blk-mq-rdma: remove queue mapping helper for rdma devices
No rdma device exposes its irq vectors affinity today. So the only
mapping that we have left, is the default blk_mq_map_queues, which
we fallback to anyways. Also fixup the only consumer of this helper
(nvme-rdma).
Remove this now dead code.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
zhenwei pi [Fri, 7 Apr 2023 09:15:57 +0000 (17:15 +0800)]
nvme-rdma: minor cleanup in nvme_rdma_create_cq()
Before cleanup:
enum ib_poll_context poll_ctx;
if (nvme_rdma_poll_queue(queue)) {
poll_ctx = IB_POLL_DIRECT;
queue->ib_cq = ib_alloc_cq(ibdev, queue, queue->cq_size,
comp_vector, poll_ctx);
} else {
poll_ctx = IB_POLL_SOFTIRQ;
queue->ib_cq = ib_cq_pool_get(ibdev, queue->cq_size,
comp_vector, poll_ctx);
}
After cleanup:
if (nvme_rdma_poll_queue(queue))
queue->ib_cq = ib_alloc_cq(ibdev, queue, queue->cq_size,
comp_vector, IB_POLL_DIRECT);
else
queue->ib_cq = ib_cq_pool_get(ibdev, queue->cq_size,
comp_vector, IB_POLL_SOFTIRQ);
IB_POLL_SOFTIRQ/IB_POLL_SOFTIRQ gets used directly in function, this
seems more accessible.
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Lei Yin [Thu, 6 Apr 2023 15:39:11 +0000 (23:39 +0800)]
nvme: fix double blk_mq_complete_request for timeout request with low probability
When nvme_cancel_tagset traverses all tagsets and executes
nvme_cancel_request, this request may be executing blk_mq_free_request
that is called by nvme_rdma_complete_timed_out/nvme_tcp_complete_timed_out.
When blk_mq_free_request executes to WRITE_ONCE(rq->state, MQ_RQ_IDLE) and
__blk_mq_free_request(rq), it will cause double blk_mq_complete_request for
this request, and it will cause a null pointer error in the second
execution of this function because rq->mq_hctx has set to NULL in first
execution.
Signed-off-by: Lei Yin <yinlei2@lenovo.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Keith Busch [Wed, 5 Apr 2023 21:57:20 +0000 (14:57 -0700)]
nvme: fix async event trace event
Mixing AER Event Type and Event Info has masking clashes. Just print the
event type, but also include the event info of the AER result in the
trace.
Fixes: 09bd1ff4b15143b ("nvme-core: add async event trace helper")
Reported-by: Nate Thornton <nate.thornton@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Minwoo Im <minwoo.im@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Chaitanya Kulkarni [Mon, 27 Mar 2023 05:48:38 +0000 (22:48 -0700)]
nvme-apple: return directly instead of else
There is no need for the else when direct return is used at the end of
the function.
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Chaitanya Kulkarni [Mon, 27 Mar 2023 05:48:37 +0000 (22:48 -0700)]
nvme-apple: return directly instead of else
There is no need for the else when direct return is used at the end of
the function.
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Chaitanya Kulkarni [Mon, 27 Mar 2023 05:37:24 +0000 (22:37 -0700)]
nvmet-tcp: validate idle poll modparam value
The module parameter idle_poll_period_usecs is passed to the function
usecs_to_jiffies() which has following prototype and expect
idle_poll_period_usecs arg type to be unsigned int:-
unsigned long usecs_to_jiffies(const unsigned int u);
Use similar module parameter validation callback as previous patch.
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Chaitanya Kulkarni [Mon, 27 Mar 2023 05:37:23 +0000 (22:37 -0700)]
nvmet-tcp: validate so_priority modparam value
The module parameter so_priority is passed to the function
sock_set_priority() which has following prototype and expect
priotity arg type to be u32:-
void sock_set_priority(struct sock *sk, u32 priority);
Add a module parameter validation callback to reject any negative
values for the so_priority as it is defigned as int. Use this
oppurtunity to update the module parameter description and print the
default value.
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Chris Leech [Tue, 21 Mar 2023 16:30:25 +0000 (09:30 -0700)]
nvme-tcp: fence TCP socket on receive error
Ensure that no further socket reads occur after a receive processing
error, either from io_work being re-scheduled or nvme_tcp_poll.
Failing to do so can result in unrecognised PDU payloads or TCP stream
garbage being processed as a C2H data PDU, and potentially start copying
the payload to an invalid destination after looking up a request using a
bogus command id.
Signed-off-by: Chris Leech <cleech@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Christoph Hellwig [Wed, 22 Mar 2023 08:08:59 +0000 (09:08 +0100)]
nvmet: remove nvmet_req_cns_error_complete
Just fold it into the only caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Christoph Hellwig [Wed, 15 Mar 2023 14:14:31 +0000 (15:14 +0100)]
nvmet: rename nvmet_execute_identify_cns_cs_ns
nvmet_execute_identify_ns_zns is a more descriptive name for the
function handling the "I/O Command Set Specific Identify Namespace
Data Structure for the Zoned Namespace Command Set".
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Christoph Hellwig [Wed, 15 Mar 2023 14:13:35 +0000 (15:13 +0100)]
nvmet: fix Identify Identification Descriptor List handling
The Identification Descriptor List CNS value does not check the CSI
value, so remove the code trying to handle it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Damien Le Moal [Wed, 15 Mar 2023 10:59:39 +0000 (19:59 +0900)]
nvmet: cleanup nvmet_execute_identify()
Change the order of the cases in nvmet_execute_identify() main
switch-case to match the NVMe 2.0 specification order as defined in
table 273. This is also the increasing order of CNS values.
While at it, for clarity, make it explicit that identify with cns set
to NVME_ID_CNS_CS_NS does not support NVM command set specific data.
No functional changes are introduced by this cleanup.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Damien Le Moal [Wed, 15 Mar 2023 10:59:38 +0000 (19:59 +0900)]
nvmet: fix I/O Command Set specific Identify Controller
For an identify command with cns set to NVME_ID_CNS_CS_CTRL, the NVMe
2.0 specification states that:
If the I/O Command Set specified by the CSI field does not have an
Identify Controller data structure, then the controller shall return
a zero filled data structure. If the host requests a data structure for
an I/O Command Set that the controller does not support, the controller
shall abort the command with a status code of Invalid Field in Command.
However, the current implementation of this identify command in
nvmet_execute_identify() only handles the ZNS command set, returning an
error for the NVM command set, which is not compliant with the
specifications as we do support this command set.
Fix this by:
1) Renaming nvmet_execute_identify_cns_cs_ctrl() to
nvmet_execute_identify_ctrl_zns() to continue handling the
ZNS command set as is.
2) Introduce a nvmet_execute_identify_ctrl_ns() helper to handle the
NVM command set, returning a zero filled nvme_id_ctrl_nvm data
structure.
3) Modify nvmet_execute_identify() to call these helpers based on
the csi specified, returning an error for unsupported command sets.
Fixes: aaf2e048af27 ("nvmet: add ZBD over ZNS backend support")
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Damien Le Moal [Wed, 15 Mar 2023 10:59:37 +0000 (19:59 +0900)]
nvmet: fix Identify Active Namespace ID list handling
The identify command with cns set to NVME_ID_CNS_NS_ACTIVE_LIST does
not depend on the command set. The execution of this command should
thus not look at the csi field specified in the command. Simplify
nvmet_execute_identify() to directly call
nvmet_execute_identify_nslist() without the csi switch-case.
Fixes: ab5d0b38c047 ("nvmet: add Command Set Identifier support")
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Damien Le Moal [Wed, 15 Mar 2023 10:59:36 +0000 (19:59 +0900)]
nvmet: fix Identify Controller handling
The identify command with cns set to NVME_ID_CNS_CTRL does not depend on
the command set. The execution of this command should thus not look at
the csi specified in the command. Simplify nvmet_execute_identify() to
directly call nvmet_execute_identify_ctrl() without the csi switch-case.
Fixes: ab5d0b38c047 ("nvmet: add Command Set Identifier support")
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Damien Le Moal [Wed, 15 Mar 2023 10:59:35 +0000 (19:59 +0900)]
nvmet: fix Identify Namespace handling
The identify command with cns set to NVME_ID_CNS_NS does not directly
depend on the command set. The NVMe specifications is rather confusing
here as it appears that this command only applies to the NVM command
set. However, footnote 8 of Figure 273 in the NVMe 2.0 base
specifications clearly state that this command applies to NVM command
sets that support logical blocks, that is, NVM and ZNS. Both the NVM and
ZNS command set specifications also list this identify as mandatory.
The command handling should thus not look at the csi field since it is
defined as unused for this command. Given that we do not support the
KV command set, simply remove the csi switch-case for that command
handling and call directly nvmet_execute_identify_ns() in
nvmet_execute_identify().
Fixes: ab5d0b38c047 ("nvmet: add Command Set Identifier support")
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
projects / platform / kernel / linux-starfive.git / log