Pass the block_device and operation that we plan to use this bio for to
bio_alloc_bioset to optimize the assigment. NULL/0 can be passed, both
for the passthrough case on a raw request_queue and to temporarily avoid
refactoring some nasty code.
Also move the gfp_mask argument after the nr_vecs argument for a much
more logical calling convention matching what most of the kernel does.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220124091107.642561-16-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use blkdev_issue_flush, which uses an on-stack bio instead of an
opencoded version with a bio embedded into struct pool.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use blkdev_issue_flush, which uses an on-stack bio instead of an
opencoded version with a bio embedded into struct dm_snapshot.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Just open code it next to the bio allocations, which saves a few lines
of code, prepares for future changes and allows to remove the duplicate
bi_opf assignment for the bio_clone_fast case in kcryptd_io_read.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
There is no good reason to keep genhd.h separate from the main blkdev.h
header that includes it. So fold the contents of genhd.h into blkdev.h
and remove genhd.h entirely.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220124093913.742411-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Record the start_time for a bio but defer the starting block core's IO
accounting until after IO is submitted using bio_start_io_acct_time().
This approach avoids the need to mess around with any of the
individual IO stats in response to a bio_split() that follows bio
submission.
Reported-by: Bud Brown <bubrown@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Depends-on: e45c47d1f9 ("block: add bio_start_io_acct_time() to control start_time")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220128155841.39644-4-snitzer@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Simplify the dax_operations API
- Eliminate bdev_dax_pgoff() in favor of the filesystem maintaining
and applying a partition offset to all its DAX iomap operations.
- Remove wrappers and device-mapper stacked callbacks for
->copy_from_iter() and ->copy_to_iter() in favor of moving
block_device relative offset responsibility to the
dax_direct_access() caller.
- Remove the need for an @bdev in filesystem-DAX infrastructure
- Remove unused uio helpers copy_from_iter_flushcache() and
copy_mc_to_iter() as only the non-check_copy_size() versions are
used for DAX.
- Prepare XFS for the pending (next merge window) DAX+reflink support
- Remove deprecated DEV_DAX_PMEM_COMPAT support
- Cleanup a straggling misuse of the GUID api
Tags offered after the branch was cut:
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/Ydb/3P+8nvjCjYfO@redhat.com
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Merge tag 'libnvdimm-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull dax and libnvdimm updates from Dan Williams:
"The bulk of this is a rework of the dax_operations API after
discovering the obstacles it posed to the work-in-progress DAX+reflink
support for XFS and other copy-on-write filesystem mechanics.
Primarily the need to plumb a block_device through the API to handle
partition offsets was a sticking point and Christoph untangled that
dependency in addition to other cleanups to make landing the
DAX+reflink support easier.
The DAX_PMEM_COMPAT option has been around for 4 years and not only
are distributions shipping userspace that understand the current
configuration API, but some are not even bothering to turn this option
on anymore, so it seems a good time to remove it per the deprecation
schedule. Recall that this was added after the device-dax subsystem
moved from /sys/class/dax to /sys/bus/dax for its sysfs organization.
All recent functionality depends on /sys/bus/dax.
Some other miscellaneous cleanups and reflink prep patches are
included as well.
Summary:
- Simplify the dax_operations API:
- Eliminate bdev_dax_pgoff() in favor of the filesystem
maintaining and applying a partition offset to all its DAX iomap
operations.
- Remove wrappers and device-mapper stacked callbacks for
->copy_from_iter() and ->copy_to_iter() in favor of moving
block_device relative offset responsibility to the
dax_direct_access() caller.
- Remove the need for an @bdev in filesystem-DAX infrastructure
- Remove unused uio helpers copy_from_iter_flushcache() and
copy_mc_to_iter() as only the non-check_copy_size() versions are
used for DAX.
- Prepare XFS for the pending (next merge window) DAX+reflink support
- Remove deprecated DEV_DAX_PMEM_COMPAT support
- Cleanup a straggling misuse of the GUID api"
* tag 'libnvdimm-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (38 commits)
iomap: Fix error handling in iomap_zero_iter()
ACPI: NFIT: Import GUID before use
dax: remove the copy_from_iter and copy_to_iter methods
dax: remove the DAXDEV_F_SYNC flag
dax: simplify dax_synchronous and set_dax_synchronous
uio: remove copy_from_iter_flushcache() and copy_mc_to_iter()
iomap: turn the byte variable in iomap_zero_iter into a ssize_t
memremap: remove support for external pgmap refcounts
fsdax: don't require CONFIG_BLOCK
iomap: build the block based code conditionally
dax: fix up some of the block device related ifdefs
fsdax: shift partition offset handling into the file systems
dax: return the partition offset from fs_dax_get_by_bdev
iomap: add a IOMAP_DAX flag
xfs: pass the mapping flags to xfs_bmbt_to_iomap
xfs: use xfs_direct_write_iomap_ops for DAX zeroing
xfs: move dax device handling into xfs_{alloc,free}_buftarg
ext4: cleanup the dax handling in ext4_fill_super
ext2: cleanup the dax handling in ext2_fill_super
fsdax: decouple zeroing from the iomap buffered I/O code
...
persistent-data library used by thinp and cache.
- Update DM integrity to use struct_group() to zero struct
journal_sector.
- Update DM sysfs to use default_groups in kobj_type.
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Merge tag 'for-5.17/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer:
- Fixes and improvements to dm btree and dm space map code in
persistent-data library used by thinp and cache.
- Update DM integrity to use struct_group() to zero struct
journal_sector.
- Update DM sysfs to use default_groups in kobj_type.
* tag 'for-5.17/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm sysfs: use default_groups in kobj_type
dm integrity: Use struct_group() to zero struct journal_sector
dm space map common: add bounds check to sm_ll_lookup_bitmap()
dm btree: add a defensive bounds check to insert_at()
dm btree remove: change a bunch of BUG_ON() calls to proper errors
dm btree spine: eliminate duplicate le32_to_cpu() in node_check()
dm btree spine: remove extra node_check function declaration
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Merge tag 'for-5.17/drivers-2022-01-11' of git://git.kernel.dk/linux-block
Pull block driver updates from Jens Axboe:
- mtip32xx pci cleanups (Bjorn)
- mtip32xx conversion to generic power management (Vaibhav)
- rsxx pci powermanagement cleanups (Bjorn)
- Remove the rsxx driver. This hardware never saw much adoption, and
it's been end of lifed for a while. (Christoph)
- MD pull request from Song:
- REQ_NOWAIT support (Vishal Verma)
- raid6 benchmark optimization (Dirk Müller)
- Fix for acct bioset (Xiao Ni)
- Clean up max_queued_requests (Mariusz Tkaczyk)
- PREEMPT_RT optimization (Davidlohr Bueso)
- Use default_groups in kobj_type (Greg Kroah-Hartman)
- Use attribute groups in pktcdvd and rnbd (Greg)
- NVMe pull request from Christoph:
- increment request genctr on completion (Keith Busch, Geliang
Tang)
- add a 'iopolicy' module parameter (Hannes Reinecke)
- print out valid arguments when reading from /dev/nvme-fabrics
(Hannes Reinecke)
- Use struct_group() in drbd (Kees)
- null_blk fixes (Ming)
- Get rid of congestion logic in pktcdvd (Neil)
- Floppy ejection hang fix (Tasos)
- Floppy max user request size fix (Xiongwei)
- Loop locking fix (Tetsuo)
* tag 'for-5.17/drivers-2022-01-11' of git://git.kernel.dk/linux-block: (32 commits)
md: use default_groups in kobj_type
md: Move alloc/free acct bioset in to personality
lib/raid6: Use strict priority ranking for pq gen() benchmarking
lib/raid6: skip benchmark of non-chosen xor_syndrome functions
md: fix spelling of "its"
md: raid456 add nowait support
md: raid10 add nowait support
md: raid1 add nowait support
md: add support for REQ_NOWAIT
md: drop queue limitation for RAID1 and RAID10
md/raid5: play nice with PREEMPT_RT
block/rnbd-clt-sysfs: use default_groups in kobj_type
pktcdvd: convert to use attribute groups
block: null_blk: only set set->nr_maps as 3 if active poll_queues is > 0
nvme: add 'iopolicy' module parameter
nvme: drop unused variable ctrl in nvme_setup_cmd
nvme: increment request genctr on completion
nvme-fabrics: print out valid arguments when reading from /dev/nvme-fabrics
block: remove the rsxx driver
rsxx: Drop PCI legacy power management
...
There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field. Move the md rdev sysfs code to use default_groups field which
has been the preferred way since commit aa30f47cf6 ("kobject: Add
support for default attribute groups to kobj_type") so that we can soon
get rid of the obsolete default_attrs field.
Cc: Song Liu <song@kernel.org>
Cc: linux-raid@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Song Liu <song@kernel.org>
Use the possessive "its" instead of the contraction "it's"
in printed messages.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: linux-raid@vger.kernel.org
Signed-off-by: Song Liu <song@kernel.org>
Returns EAGAIN in case the raid456 driver would block waiting for reshape.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Vishal Verma <vverma@digitalocean.com>
Signed-off-by: Song Liu <song@kernel.org>
This adds nowait support to the RAID10 driver. Very similar to
raid1 driver changes. It makes RAID10 driver return with EAGAIN
for situations where it could wait for eg:
- Waiting for the barrier,
- Reshape operation,
- Discard operation.
wait_barrier() and regular_request_wait() fn are modified to return bool
to support error for wait barriers. They returns true in case of wait
or if wait is not required and returns false if wait was required
but not performed to support nowait.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Vishal Verma <vverma@digitalocean.com>
Signed-off-by: Song Liu <song@kernel.org>
This adds nowait support to the RAID1 driver. It makes RAID1 driver
return with EAGAIN for situations where it could wait for eg:
- Waiting for the barrier,
wait_barrier() fn is modified to return bool to support error for
wait barriers. It returns true in case of wait or if wait is not
required and returns false if wait was required but not performed
to support nowait.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Vishal Verma <vverma@digitalocean.com>
Signed-off-by: Song Liu <song@kernel.org>
commit 021a24460d ("block: add QUEUE_FLAG_NOWAIT") added support
for checking whether a given bdev supports handling of REQ_NOWAIT or not.
Since then commit 6abc49468e ("dm: add support for REQ_NOWAIT and enable
it for linear target") added support for REQ_NOWAIT for dm. This uses
a similar approach to incorporate REQ_NOWAIT for md based bios.
This patch was tested using t/io_uring tool within FIO. A nvme drive
was partitioned into 2 partitions and a simple raid 0 configuration
/dev/md0 was created.
md0 : active raid0 nvme4n1p1[1] nvme4n1p2[0]
937423872 blocks super 1.2 512k chunks
Before patch:
$ ./t/io_uring /dev/md0 -p 0 -a 0 -d 1 -r 100
Running top while the above runs:
$ ps -eL | grep $(pidof io_uring)
38396 38396 pts/2 00:00:00 io_uring
38396 38397 pts/2 00:00:15 io_uring
38396 38398 pts/2 00:00:13 iou-wrk-38397
We can see iou-wrk-38397 io worker thread created which gets created
when io_uring sees that the underlying device (/dev/md0 in this case)
doesn't support nowait.
After patch:
$ ./t/io_uring /dev/md0 -p 0 -a 0 -d 1 -r 100
Running top while the above runs:
$ ps -eL | grep $(pidof io_uring)
38341 38341 pts/2 00:10:22 io_uring
38341 38342 pts/2 00:10:37 io_uring
After running this patch, we don't see any io worker thread
being created which indicated that io_uring saw that the
underlying device does support nowait. This is the exact behaviour
noticed on a dm device which also supports nowait.
For all the other raid personalities except raid0, we would need
to train pieces which involves make_request fn in order for them
to correctly handle REQ_NOWAIT.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Vishal Verma <vverma@digitalocean.com>
Signed-off-by: Song Liu <song@kernel.org>
As suggested by Neil Brown[1], this limitation seems to be
deprecated.
With plugging in use, writes are processed behind the raid thread
and conf->pending_count is not increased. This limitation occurs only
if caller doesn't use plugs.
It can be avoided and often it is (with plugging). There are no reports
that queue is growing to enormous size so remove queue limitation for
non-plugged IOs too.
[1] https://lore.kernel.org/linux-raid/162496301481.7211.18031090130574610495@noble.neil.brown.name
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Song Liu <song@kernel.org>
raid_run_ops() relies on the implicitly disabled preemption for
its percpu ops, although this is really about CPU locality. This
breaks RT semantics as it can take regular (and thus sleeping)
spinlocks, such as stripe_lock.
Add a local_lock such that non-RT does not change and continues
to be just map to preempt_disable/enable, but makes RT happy as
the region will use a per-CPU spinlock and thus be preemptible
and still guarantee CPU locality.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Song Liu <songliubraving@fb.com>
There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field. Move the dm sysfs code to use default_groups field which has
been the preferred way since aa30f47cf6 ("kobject: Add support for
default attribute groups to kobj_type") so that we can soon get rid of
the obsolete default_attrs field.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memset(), avoid intentionally writing across
neighboring fields.
Add struct_group() to mark region of struct journal_sector that should be
initialized to zero.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Corrupted metadata could warrant returning error from sm_ll_lookup_bitmap().
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Abuse of BUG_ON() is never appropriate, best to propagate errors to
fail gracefully (rather than take the entire system down).
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Should have been removed as part of commit f73e2e70ec ("dm btree
spine: remove paranoid node_check call in node_prep_for_write()")
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
These methods indirect the actual DAX read/write path. In the end pmem
uses magic flush and mc safe variants and fuse and dcssblk use plain ones
while device mapper picks redirects to the underlying device.
Add set_dax_nocache() and set_dax_nomc() APIs to control which copy
routines are used to remove indirect call from the read/write fast path
as well as a lot of boilerplate code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com> [virtiofs]
Link: https://lore.kernel.org/r/20211215084508.435401-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Remove the DAXDEV_F_SYNC flag and thus the flags argument to alloc_dax and
just let the drivers call set_dax_synchronous directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211215084508.435401-4-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Merge tag 'block-5.16-2021-12-17' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- Fix for hammering on the delayed run queue timer (me)
- bcache regression fix for this merge window (Lin)
- Fix a divide-by-zero in the blk-iocost code (Tejun)
* tag 'block-5.16-2021-12-17' of git://git.kernel.dk/linux-block:
bcache: fix NULL pointer reference in cached_dev_detach_finish
block: reduce kblockd_mod_delayed_work_on() CPU consumption
iocost: Fix divide-by-zero on donation from low hweight cgroup
- Fix DM integrity data corruption, introduced during 5.16 merge, due
to improper use of bvec_kmap_local().
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Merge tag 'for-5.16/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Fix use after free in DM btree remove's rebalance_children()
- Fix DM integrity data corruption, introduced during 5.16 merge, due
to improper use of bvec_kmap_local()
* tag 'for-5.16/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm integrity: fix data corruption due to improper use of bvec_kmap_local
dm btree remove: fix use after free in rebalance_children()
Commit 25058d1c72 ("dm integrity: use bvec_kmap_local in
__journal_read_write") didn't account for __journal_read_write() later
adding the biovec's bv_offset. As such using bvec_kmap_local() caused
the start of the biovec to be skipped.
Trivial test that illustrates data corruption:
# integritysetup format /dev/pmem0
# integritysetup open /dev/pmem0 integrityroot
# mkfs.xfs /dev/mapper/integrityroot
...
bad magic number
bad magic number
Metadata corruption detected at xfs_sb block 0x0/0x1000
libxfs_writebufr: write verifer failed on xfs_sb bno 0x0/0x1000
releasing dirty buffer (bulk) to free list!
Fix this by using kmap_local_page() instead of bvec_kmap_local() in
__journal_read_write().
Fixes: 25058d1c72 ("dm integrity: use bvec_kmap_local in __journal_read_write")
Reported-by: Tony Asleson <tasleson@redhat.com>
Reviewed-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Commit 0259d4498b ("bcache: move calc_cached_dev_sectors to proper
place on backing device detach") tries to fix calc_cached_dev_sectors
when bcache device detaches, but now we have:
cached_dev_detach_finish
...
bcache_device_detach(&dc->disk);
...
closure_put(&d->c->caching);
d->c = NULL; [*explicitly set dc->disk.c to NULL*]
list_move(&dc->list, &uncached_devices);
calc_cached_dev_sectors(dc->disk.c); [*passing a NULL pointer*]
...
Upper codeflows shows how bug happens, this patch fix the problem by
caching dc->disk.c beforehand, and cache_set won't be freed under us
because c->caching closure at least holds a reference count and closure
callback __cache_set_unregister only being called by bch_cache_set_stop
which using closure_queue(&c->caching), that means c->caching closure
callback for destroying cache_set won't be trigger by previous
closure_put(&d->c->caching).
So at this stage(while cached_dev_detach_finish is calling) it's safe to
access cache_set dc->disk.c.
Fixes: 0259d4498b ("bcache: move calc_cached_dev_sectors to proper place on backing device detach")
Signed-off-by: Lin Feng <linf@wangsu.com>
Signed-off-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20211112053629.3437-2-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
In driver/md/md.c, if the function autorun_array() is called,
the problem of double free may occur.
In function autorun_array(), when the function do_md_run() returns an
error, the function do_md_stop() will be called.
The function do_md_run() called function md_run(), but in function
md_run(), the pointer mddev->private may be freed.
The function do_md_stop() called the function __md_stop(), but in
function __md_stop(), the pointer mddev->private also will be freed
without judging null.
At this time, the pointer mddev->private will be double free, so it
needs to be judged null or not.
Signed-off-by: zhangyue <zhangyue1@kylinos.cn>
Signed-off-by: Song Liu <songliubraving@fb.com>
The superblock of version 1.0 doesn't get moved to the new position on a
device size change. This leads to a rdev without a superblock on a known
position, the raid can't be re-assembled.
The line was removed by mistake and is re-added by this patch.
Fixes: d9c0fa509e ("md: fix max sectors calculation for super 1.0")
Cc: stable@vger.kernel.org
Signed-off-by: Markus Hochholdinger <markus@hochholdinger.net>
Reviewed-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Prepare for the removal of the block_device from the DAX I/O path by
returning the partition offset from fs_dax_get_by_bdev so that the file
systems have it at hand for use during I/O.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-26-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Add a helper to perform the entire remapping for DAX accesses. This
helper open codes bdev_dax_pgoff given that the alignment checks have
already been done by the submitting file system and don't need to be
repeated.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211129102203.2243509-12-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Add a helper to perform the entire remapping for DAX accesses. This
helper open codes bdev_dax_pgoff given that the alignment checks have
already been done by the submitting file system and don't need to be
repeated.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211129102203.2243509-11-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Add a helper to perform the entire remapping for DAX accesses. This
helper open codes bdev_dax_pgoff given that the alignment checks have
already been done by the submitting file system and don't need to be
repeated.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211129102203.2243509-10-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Just open code the block size and dax_dev == NULL checks in the callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> [erofs]
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-9-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Replace the dax_host_hash with an xarray indexed by the pointer value
of the gendisk, and require explicitly calls from the block drivers that
want to associate their gendisk with a dax_device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The device mapper DAX support is all hanging off a block device and thus
can't be used with device dax. Make it depend on CONFIG_FS_DAX instead
of CONFIG_DAX_DRIVER. This also means that bdev_dax_pgoff only needs to
be built under CONFIG_FS_DAX now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20211129102203.2243509-3-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Make sure ->dax_dev is NULL on error so that the cleanup path doesn't
trip over an ERR_PTR.
Reported-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211129102203.2243509-2-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Just use the disk attached to the request_queue instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20211126121802.2090656-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
All modern drivers can support extra partitions using the extended
dev_t. In fact except for the ioctl method drivers never even see
partitions in normal operation.
So remove the GENHD_FL_EXT_DEVT and allow extra partitions for all
block devices that do support partitions, and require those that
do not support partitions to explicit disallow them using
GENHD_FL_NO_PART.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211122130625.1136848-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Move dm_tm_unlock() after dm_tm_dec().
Cc: stable@vger.kernel.org
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Merge tag 'for-5.16/drivers-2021-11-09' of git://git.kernel.dk/linux-block
Pull more block driver updates from Jens Axboe:
- Last series adding error handling support for add_disk() in drivers.
After this one, and once the SCSI side has been merged, we can
finally annotate add_disk() as must_check. (Luis)
- bcache fixes (Coly)
- zram fixes (Ming)
- ataflop locking fix (Tetsuo)
- nbd fixes (Ye, Yu)
- MD merge via Song
- Cleanup (Yang)
- sysfs fix (Guoqing)
- Misc fixes (Geert, Wu, luo)
* tag 'for-5.16/drivers-2021-11-09' of git://git.kernel.dk/linux-block: (34 commits)
bcache: Revert "bcache: use bvec_virt"
ataflop: Add missing semicolon to return statement
floppy: address add_disk() error handling on probe
ataflop: address add_disk() error handling on probe
block: update __register_blkdev() probe documentation
ataflop: remove ataflop_probe_lock mutex
mtd/ubi/block: add error handling support for add_disk()
block/sunvdc: add error handling support for add_disk()
z2ram: add error handling support for add_disk()
nvdimm/pmem: use add_disk() error handling
nvdimm/pmem: cleanup the disk if pmem_release_disk() is yet assigned
nvdimm/blk: add error handling support for add_disk()
nvdimm/blk: avoid calling del_gendisk() on early failures
nvdimm/btt: add error handling support for add_disk()
nvdimm/btt: use goto error labels on btt_blk_init()
loop: Remove duplicate assignments
drbd: Fix double free problem in drbd_create_device
nvdimm/btt: do not call del_gendisk() if not needed
bcache: fix use-after-free problem in bcache_device_free()
zram: replace fsync_bdev with sync_blockdev
...
