dasd_add_busid() can return an error via ERR_PTR() if an allocation
fails. However, two callsites in dasd_copy_pair_store() do not check
the result, potentially resulting in a NULL pointer dereference. Fix
this by checking the result with IS_ERR() and returning the error up
the stack.
Fixes: a91ff09d39 ("s390/dasd: add copy pair setup")
Signed-off-by: Carlos López <clopez@suse.de>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20240715112434.2111291-3-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
With ARCH=s390, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_diag_mod.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_eckd_mod.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_fba_mod.o
Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20240715112434.2111291-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pull MD fixes from Song:
"Changes in this set are:
1. md-cluster fixes by Heming Zhao;
2. raid1 fix by Mateusz Jończyk."
* tag 'md-6.11-20240712' of git://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md/raid1: set max_sectors during early return from choose_slow_rdev()
md-cluster: fix no recovery job when adding/re-adding a disk
md-cluster: fix hanging issue while a new disk adding
Linux 6.9+ is unable to start a degraded RAID1 array with one drive,
when that drive has a write-mostly flag set. During such an attempt,
the following assertion in bio_split() is hit:
BUG_ON(sectors <= 0);
Call Trace:
? bio_split+0x96/0xb0
? exc_invalid_op+0x53/0x70
? bio_split+0x96/0xb0
? asm_exc_invalid_op+0x1b/0x20
? bio_split+0x96/0xb0
? raid1_read_request+0x890/0xd20
? __call_rcu_common.constprop.0+0x97/0x260
raid1_make_request+0x81/0xce0
? __get_random_u32_below+0x17/0x70
? new_slab+0x2b3/0x580
md_handle_request+0x77/0x210
md_submit_bio+0x62/0xa0
__submit_bio+0x17b/0x230
submit_bio_noacct_nocheck+0x18e/0x3c0
submit_bio_noacct+0x244/0x670
After investigation, it turned out that choose_slow_rdev() does not set
the value of max_sectors in some cases and because of it,
raid1_read_request calls bio_split with sectors == 0.
Fix it by filling in this variable.
This bug was introduced in
commit dfa8ecd167 ("md/raid1: factor out choose_slow_rdev() from read_balance()")
but apparently hidden until
commit 0091c5a269 ("md/raid1: factor out helpers to choose the best rdev from read_balance()")
shortly thereafter.
Cc: stable@vger.kernel.org # 6.9.x+
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Fixes: dfa8ecd167 ("md/raid1: factor out choose_slow_rdev() from read_balance()")
Cc: Song Liu <song@kernel.org>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Paul Luse <paul.e.luse@linux.intel.com>
Cc: Xiao Ni <xni@redhat.com>
Cc: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Link: https://lore.kernel.org/linux-raid/20240706143038.7253-1-mat.jonczyk@o2.pl/
--
Tested on both Linux 6.10 and 6.9.8.
Inside a VM, mdadm testsuite for RAID1 on 6.10 did not find any problems:
./test --dev=loop --no-error --raidtype=raid1
(on 6.9.8 there was one failure, caused by external bitmap support not
compiled in).
Notes:
- I was reliably getting deadlocks when adding / removing devices
on such an array - while the array was loaded with fsstress with 20
concurrent processes. When the array was idle or loaded with fsstress
with 8 processes, no such deadlocks happened in my tests.
This occurred also on unpatched Linux 6.8.0 though, but not on
6.1.97-rc1, so this is likely an independent regression (to be
investigated).
- I was also getting deadlocks when adding / removing the bitmap on the
array in similar conditions - this happened on Linux 6.1.97-rc1
also though. fsstress with 8 concurrent processes did cause it only
once during many tests.
- in my testing, there was once a problem with hot adding an
internal bitmap to the array:
mdadm: Cannot add bitmap while array is resyncing or reshaping etc.
mdadm: failed to set internal bitmap.
even though no such reshaping was happening according to /proc/mdstat.
This seems unrelated, though.
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240711202316.10775-1-mat.jonczyk@o2.pl
The commit db5e653d7c ("md: delay choosing sync action to
md_start_sync()") delays the start of the sync action. In a
clustered environment, this will cause another node to first
activate the spare disk and skip recovery. As a result, no
nodes will perform recovery when a disk is added or re-added.
Before db5e653d7c:
```
node1 node2
----------------------------------------------------------------
md_check_recovery
+ md_update_sb
| sendmsg: METADATA_UPDATED
+ md_choose_sync_action process_metadata_update
| remove_and_add_spares //node1 has not finished adding
+ call mddev->sync_work //the spare disk:do nothing
md_start_sync
starts md_do_sync
md_do_sync
+ grabbed resync_lockres:DLM_LOCK_EX
+ do syncing job
md_check_recovery
sendmsg: METADATA_UPDATED
process_metadata_update
//activate spare disk
... ...
md_do_sync
waiting to grab resync_lockres:EX
```
After db5e653d7c:
(note: if 'cmd:idle' sets MD_RECOVERY_INTR after md_check_recovery
starts md_start_sync, setting the INTR action will exacerbate the
delay in node1 calling the md_do_sync function.)
```
node1 node2
----------------------------------------------------------------
md_check_recovery
+ md_update_sb
| sendmsg: METADATA_UPDATED
+ calls mddev->sync_work process_metadata_update
//node1 has not finished adding
//the spare disk:do nothing
md_start_sync
+ md_choose_sync_action
| remove_and_add_spares
+ calls md_do_sync
md_check_recovery
md_update_sb
sendmsg: METADATA_UPDATED
process_metadata_update
//activate spare disk
... ... ... ...
md_do_sync
+ grabbed resync_lockres:EX
+ raid1_sync_request skip sync under
conf->fullsync:0
md_do_sync
1. waiting to grab resync_lockres:EX
2. when node1 could grab EX lock,
node1 will skip resync under recovery_offset:MaxSector
```
How to trigger:
```(commands @node1)
# to easily watch the recovery status
echo 2000 > /proc/sys/dev/raid/speed_limit_max
ssh root@node2 "echo 2000 > /proc/sys/dev/raid/speed_limit_max"
mdadm -CR /dev/md0 -l1 -b clustered -n 2 /dev/sda /dev/sdb --assume-clean
ssh root@node2 mdadm -A /dev/md0 /dev/sda /dev/sdb
mdadm --manage /dev/md0 --fail /dev/sda --remove /dev/sda
mdadm --manage /dev/md0 --add /dev/sdc
=== "cat /proc/mdstat" on both node, there are no recovery action. ===
```
How to fix:
because md layer code logic is hard to restore for speeding up sync job
on local node, we add new cluster msg to pending the another node to
active disk.
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Reviewed-by: Su Yue <glass.su@suse.com>
Acked-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240709104120.22243-2-heming.zhao@suse.com
The commit 1bbe254e43 ("md-cluster: check for timeout while a
new disk adding") is correct in terms of code syntax but not
suite real clustered code logic.
When a timeout occurs while adding a new disk, if recv_daemon()
bypasses the unlock for ack_lockres:CR, another node will be waiting
to grab EX lock. This will cause the cluster to hang indefinitely.
How to fix:
1. In dlm_lock_sync(), change the wait behaviour from forever to a
timeout, This could avoid the hanging issue when another node
fails to handle cluster msg. Another result of this change is
that if another node receives an unknown msg (e.g. a new msg_type),
the old code will hang, whereas the new code will timeout and fail.
This could help cluster_md handle new msg_type from different
nodes with different kernel/module versions (e.g. The user only
updates one leg's kernel and monitors the stability of the new
kernel).
2. The old code for __sendmsg() always returns 0 (success) under the
design (must successfully unlock ->message_lockres). This commit
makes this function return an error number when an error occurs.
Fixes: 1bbe254e43 ("md-cluster: check for timeout while a new disk adding")
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Reviewed-by: Su Yue <glass.su@suse.com>
Acked-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240709104120.22243-1-heming.zhao@suse.com
make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/floppy.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Denis Efremov <efremov@linux.com>
Link: https://lore.kernel.org/r/20240602-md-block-floppy-v1-1-bc628ea5eb84@quicinc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/loop.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240602-md-block-loop-v1-1-b9b7e2603e72@quicinc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/ublk_drv.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20240602-md-block-ublk_drv-v1-1-995474cafff0@quicinc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/xen-blkback/xen-blkback.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240602-md-block-xen-blkback-v1-1-6ff5b58bdee1@quicinc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
'struct kobj_type' is not modified in this driver. It is only used with
kobject_init_and_add() which takes a "const struct kobj_type *" parameter.
Constifying this structure moves some data to a read-only section, so
increase overall security.
On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
4082 792 8 4882 1312 drivers/block/rnbd/rnbd-srv-sysfs.o
After:
=====
text data bss dec hex filename
4210 672 8 4890 131a drivers/block/rnbd/rnbd-srv-sysfs.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/e3d454173ffad30726c9351810d3aa7b75122711.1720462252.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The rebase of commit 09595e0c9d ("block: pass a phys_addr_t to
get_max_segment_size") lost adding the total to to the offset in
blk_bvec_map_sg. Add it back.
Fixes: 09595e0c9d ("block: pass a phys_addr_t to get_max_segment_size")
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Reported-by: Chaitanya Kulkarni <chaitanyak@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240709070126.3019940-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Correct the parameter name in the comment of get_max_segment_size()
to fix following warning:-
block/blk-merge.c:220: warning: Function parameter or struct member 'len' not described in 'get_max_segment_size'
block/blk-merge.c:220: warning: Excess function parameter 'max_len' description in 'get_max_segment_size'
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240709045432.8688-1-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The block queue limits validation does this for us now.
The loop_configure() -> WARN_ON_ONCE() call is dropped, as an invalid
block size would trigger this now. We don't want userspace to be able to
directly trigger WARNs.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/20240708091651.177447-6-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The block queue limits validation does this for us now.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240708091651.177447-5-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The block queue limits validation does this for us now.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/20240708091651.177447-4-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Some drivers validate that their own logical block size. It is no harm to
always do this, so validate in blk_validate_limits().
This allows us to remove the validation in most of those drivers.
Add a comment to blk_validate_block_size() to inform users that self-
validation of LBS is usually unnecessary.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240708091651.177447-3-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we fail to read a logical block size in virtblk_read_limits() ->
virtio_cread_feature(), then we default to what is in
lim->logical_block_size, but that would be 0.
We can deal with lim->logical_block_size = 0 later in the
blk_mq_alloc_disk(), but the code in virtblk_read_limits() needs a proper
default, so give a default of SECTOR_SIZE.
Fixes: 27e32cd23f ("block: pass a queue_limits argument to blk_mq_alloc_disk")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240708091651.177447-2-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we fail to call nvme_auth_augmented_challenge, or fail to kmalloc
for shash, we should free the memory allocation for challenge, so add
err path out_free_challenge to fix the memory leak.
Fixes: 7a277c37d3 ("nvmet-auth: Diffie-Hellman key exchange support")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Implement the get_unique_id method to allow pNFS SCSI layout access to
NVMe namespaces.
This is the server side implementation of RFC 9561 "Using the Parallel
NFS (pNFS) SCSI Layout to Access Non-Volatile Memory Express (NVMe)
Storage Devices".
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Work on a single address to simplify the logic, and prepare the callers
from using better helpers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240706075228.2350978-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Get callers out of poking into bvec internals a bit more. Not a huge win
right now, but with the proposed new DMA mapping API we might end up with
a lot more of this otherwise.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240706075228.2350978-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Zeroout can access a significant capacity and take longer than the user
expected. A user may change their mind about wanting to run that
command and attempt to kill the process and do something else with their
device. But since the task is uninterruptable, they have to wait for it
to finish, which could be many hours.
Add a new BLKDEV_ZERO_KILLABLE flag for blkdev_issue_zeroout that checks
for a fatal signal at each iteration so the user doesn't have to wait for
their regretted operation to complete naturally.
Heavily based on an earlier patch from Keith Busch.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Only fall back from hardware Write Zeroes failures when
blkdev_issue_write_zeroes returns -EOPNOTSUPP;
Note that blkdev_issue_write_zeroes turns any failure into -EOPNOTSUPP
when the write zeroes queue limit has been cleared to 0, so this still
catches all I/O errors where the driver detected missing support
for the hardware acceleration.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Split out two well-defined helpers for hardware supported Write Zeroes
and manually writing zeroes using the Write command.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Move these checks out of the lower level helpers and into the higher level
ones to prepare for refactoring.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
__blkdev_issue_zeroout is a purely kernel internal API and thus can rely
on the block layer sector alignment checks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Contrary to the comment in __blkdev_issue_write_zeroes, nothing here
checks for a potential bi_size overflow. Add a helper mirroring
the secure erase code for the check.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240701165219.1571322-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove the helper function blk_alloc_zone_bitmap() and replace its
single call site with a call to bitmap_alloc(). To be consistent with
this change, use bitmap_free() to free a disk convnetional zone bitmap.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240704052816.623865-6-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Now that device mapper can handle resetting all zones of a mapped zoned
device using REQ_OP_ZONE_RESET_ALL, all zoned block device drivers
support this operation. With this, the request queue feature
BLK_FEAT_ZONE_RESETALL is not necessary and the emulation code in
blk-zone.c can be removed.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240704052816.623865-5-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit implements processing of the REQ_OP_ZONE_RESET_ALL operation
for zoned mapped devices. Given that this operation always has a BIO
sector of 0 and a 0 size, processing through the regular BIO
__split_and_process_bio() function does not work because this function
would always select the first target. Instead, handling of this
operation is implemented using the function __send_zone_reset_all().
Similarly to the __send_empty_flush() function, the new
__send_zone_reset_all() function manually goes through all targets of a
mapped device table doing the following:
1) If the target can natively support REQ_OP_ZONE_RESET_ALL,
__send_duplicate_bios() is used to forward the reset all operation to
the target. This case is handled with the
__send_zone_reset_all_native() function.
2) For other targets, the function __send_zone_reset_all_emulated() is
executed to emulate the execution of REQ_OP_ZONE_RESET_ALL using
regular REQ_OP_ZONE_RESET operations.
Targets that can natively support REQ_OP_ZONE_RESET_ALL are identified
using the new target field zone_reset_all_supported. This boolean is set
to true in for targets that have reliable zone limits, that is, targets
that map all sequential write required zones of their zoned device(s).
Setting this field is handled in dm_set_zones_restrictions() and
device_get_zone_resource_limits().
For targets with unreliable zone limits, REQ_OP_ZONE_RESET_ALL must be
emulated (case 2 above). This is implemented with
__send_zone_reset_all_emulated() and is similar to the block layer
function blkdev_zone_reset_all_emulated(): first a report zones is done
for the zones of the target to identify zones that need reset, that is,
any sequential write required zone that is not already empty. This is
done using a bitmap and the function dm_zone_get_reset_bitmap() which
sets to 1 the bit corresponding to a zone that needs reset. Next, this
zone bitmap is inspected and a clone BIO modified to use the
REQ_OP_ZONE_RESET operation issued for any zone with its bit set in the
zone bitmap.
This implementation is more efficient than what the block layer does
with blkdev_zone_reset_all_emulated(), which is always used for DM zoned
devices currently: as we can natively use REQ_OP_ZONE_RESET_ALL on
targets mapping all sequential write required zones, resetting all zones
of a zoned mapped device can be much faster compared to always emulating
this operation using regular per-zone reset. In the worst case, this
implementation is as-efficient as the block layer emulation. This
reduction in the time it takes to reset all zones of a zoned mapped
device depends directly on the mapped device targets mapping (reliable
zone limits or not).
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240704052816.623865-4-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use a single switch-case to simplify is_abnormal_io() and make this
function more readable and easier to modify.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240704052816.623865-3-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Allow creating a zoned null_blk device with the initial state of its
sequential write required zones to be FULL. This is convenient to avoid
having to first write these zones to perform read performance evaluation
or test zone management operations such as zone reset (and zone reset
all).
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240704052816.623865-2-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove the inode variable now that the last user is gone.
Fixes: a17ece76bc ("loop: regularize upgrading the block size for direct I/O")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240705053114.2042976-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Modify bio_integrity_clone to reuse the original bvec array instead of
allocating and copying it, similar to how bio data path is cloned.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20240702100753.2168-1-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Merge MD fixes from Song:
"This PR contains various small fixes by Yu Kuai,
Benjamin Marzinski, Christophe JAILLET, and Yang Li."
* tag 'md-6.11-20240704' of git://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md/raid5: recheck if reshape has finished with device_lock held
md: Don't wait for MD_RECOVERY_NEEDED for HOT_REMOVE_DISK ioctl
md-cluster: Constify struct md_cluster_operations
md: Remove unneeded semicolon
md/raid5: fix spares errors about rcu usage
Commit c6e56cf6b2 ("block: move integrity information into
queue_limits") changed the ref tag calculation logic. It would break if
there is no integrity profile. This in turn causes read/write failures
for such cases.
Fixes: c6e56cf6b2 ("block: move integrity information into queue_limits")
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Link: https://lore.kernel.org/r/20240704061515.282343-1-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When handling an IO request, MD checks if a reshape is currently
happening, and if so, where the IO sector is in relation to the reshape
progress. MD uses conf->reshape_progress for both of these tasks. When
the reshape finishes, conf->reshape_progress is set to MaxSector. If
this occurs after MD checks if the reshape is currently happening but
before it calls ahead_of_reshape(), then ahead_of_reshape() will end up
comparing the IO sector against MaxSector. During a backwards reshape,
this will make MD think the IO sector is in the area not yet reshaped,
causing it to use the previous configuration, and map the IO to the
sector where that data was before the reshape.
This bug can be triggered by running the lvm2
lvconvert-raid-reshape-linear_to_raid6-single-type.sh test in a loop,
although it's very hard to reproduce.
Fix this by factoring the code that checks where the IO sector is in
relation to the reshape out to a helper called get_reshape_loc(),
which reads reshape_progress and reshape_safe while holding the
device_lock, and then rechecks if the reshape has finished before
calling ahead_of_reshape with the saved values.
Also use the helper during the REQ_NOWAIT check to see if the location
is inside of the reshape region.
Fixes: fef9c61fdf ("md/raid5: change reshape-progress measurement to cope with reshaping backwards.")
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240702151802.1632010-1-bmarzins@redhat.com
Commit 90f5f7ad4f ("md: Wait for md_check_recovery before attempting
device removal.") explained in the commit message that failed device
must be reomoved from the personality first by md_check_recovery(),
before it can be removed from the array. That's the reason the commit
add the code to wait for MD_RECOVERY_NEEDED.
However, this is not the case now, because remove_and_add_spares() is
called directly from hot_remove_disk() from ioctl path, hence failed
device(marked faulty) can be removed from the personality by ioctl.
On the other hand, the commit introduced a performance problem that
if MD_RECOVERY_NEEDED is set and the array is not running, ioctl will
wait for 5s before it can return failure to user.
Since the waiting is not needed now, fix the problem by removing the
waiting.
Fixes: 90f5f7ad4f ("md: Wait for md_check_recovery before attempting device removal.")
Reported-by: Mateusz Kusiak <mateusz.kusiak@linux.intel.com>
Closes: https://lore.kernel.org/all/814ff6ee-47a2-4ba0-963e-cf256ee4ecfa@linux.intel.com/
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240627112321.3044744-1-yukuai1@huaweicloud.com
'struct md_cluster_operations' is not modified in this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security.
On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
51941 1442 80 53463 d0d7 drivers/md/md-cluster.o
After:
=====
text data bss dec hex filename
52133 1246 80 53459 d0d3 drivers/md/md-cluster.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/3727f3ce9693cae4e62ae6778ea13971df805479.1719173852.git.christophe.jaillet@wanadoo.fr
Ensure that info->sector_size and info->physical_sector_size are set
before the call to blkif_set_queue_limits by doing away with the
local variables and arguments that propagate them.
Thanks to Marek Marczykowski-Górecki and Jürgen Groß for root causing
the issue.
Fixes: ba3f67c116 ("xen-blkfront: atomically update queue limits")
Reported-by: Rusty Bird <rustybird@net-c.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Link: https://lore.kernel.org/r/20240625055238.7934-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
