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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer:
- A couple stable fixes for the DM writecache target.
- A stable fix for the DM cache target that fixes the potential for
data corruption after an unclean shutdown of a cache device using
writeback mode.
- Update DM integrity target to allow the metadata to be stored on a
separate device from data.
- Fix DM kcopyd and the snapshot target to cond_resched() where
appropriate and be more efficient with processing completed work.
- A few fixes and improvements for DM crypt.
- Add DM delay target feature to configure delay of flushes independent
of writes.
- Update DM thin-provisioning target to include metadata_low_watermark
threshold in pool status.
- Fix stale DM thin-provisioning Documentation.
* tag 'for-4.19/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (26 commits)
dm writecache: fix a crash due to reading past end of dirty_bitmap
dm crypt: don't decrease device limits
dm cache metadata: set dirty on all cache blocks after a crash
dm snapshot: remove stale FIXME in snapshot_map()
dm snapshot: improve performance by switching out_of_order_list to rbtree
dm kcopyd: avoid softlockup in run_complete_job
dm cache metadata: save in-core policy_hint_size to on-disk superblock
dm thin: stop no_space_timeout worker when switching to write-mode
dm kcopyd: return void from dm_kcopyd_copy()
dm thin: include metadata_low_watermark threshold in pool status
dm writecache: report start_sector in status line
dm crypt: convert essiv from ahash to shash
dm crypt: use wake_up_process() instead of a wait queue
dm integrity: recalculate checksums on creation
dm integrity: flush journal on suspend when using separate metadata device
dm integrity: use version 2 for separate metadata
dm integrity: allow separate metadata device
dm integrity: add ic->start in get_data_sector()
dm integrity: report provided data sectors in the status
dm integrity: implement fair range locks
...
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wc->dirty_bitmap_size is in bytes so must multiply it by 8, not by
BITS_PER_LONG, to get number of bitmap_bits.
Fixes crash in find_next_bit() that was reported:
https://bugzilla.kernel.org/show_bug.cgi?id=200819
Reported-by: edo.rus@gmail.com
Fixes: 48debafe4f2f ("dm: add writecache target")
Cc: stable@vger.kernel.org # 4.18
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm-crypt should only increase device limits, it should not decrease them.
This fixes a bug where the user could creates a crypt device with 1024
sector size on the top of scsi device that had 4096 logical block size.
The limit 4096 would be lost and the user could incorrectly send
1024-I/Os to the crypt device.
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Quoting Documentation/device-mapper/cache.txt:
The 'dirty' state for a cache block changes far too frequently for us
to keep updating it on the fly. So we treat it as a hint. In normal
operation it will be written when the dm device is suspended. If the
system crashes all cache blocks will be assumed dirty when restarted.
This got broken in commit f177940a8091 ("dm cache metadata: switch to
using the new cursor api for loading metadata") in 4.9, which removed
the code that consulted cmd->clean_when_opened (CLEAN_SHUTDOWN on-disk
flag) when loading cache blocks. This results in data corruption on an
unclean shutdown with dirty cache blocks on the fast device. After the
crash those blocks are considered clean and may get evicted from the
cache at any time. This can be demonstrated by doing a lot of reads
to trigger individual evictions, but uncache is more predictable:
### Disable auto-activation in lvm.conf to be able to do uncache in
### time (i.e. see uncache doing flushing) when the fix is applied.
# xfs_io -d -c 'pwrite -b 4M -S 0xaa 0 1G' /dev/vdb
# vgcreate vg_cache /dev/vdb /dev/vdc
# lvcreate -L 1G -n lv_slowdev vg_cache /dev/vdb
# lvcreate -L 512M -n lv_cachedev vg_cache /dev/vdc
# lvcreate -L 256M -n lv_metadev vg_cache /dev/vdc
# lvconvert --type cache-pool --cachemode writeback vg_cache/lv_cachedev --poolmetadata vg_cache/lv_metadev
# lvconvert --type cache vg_cache/lv_slowdev --cachepool vg_cache/lv_cachedev
# xfs_io -d -c 'pwrite -b 4M -S 0xbb 0 512M' /dev/mapper/vg_cache-lv_slowdev
# xfs_io -d -c 'pread -v 254M 512' /dev/mapper/vg_cache-lv_slowdev | head -n 2
0fe00000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
0fe00010: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
# dmsetup status vg_cache-lv_slowdev
0 2097152 cache 8 27/65536 128 8192/8192 1 100 0 0 0 8192 7065 2 metadata2 writeback 2 migration_threshold 2048 smq 0 rw -
^^^^
7065 * 64k = 441M yet to be written to the slow device
# echo b >/proc/sysrq-trigger
# vgchange -ay vg_cache
# xfs_io -d -c 'pread -v 254M 512' /dev/mapper/vg_cache-lv_slowdev | head -n 2
0fe00000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
0fe00010: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
# lvconvert --uncache vg_cache/lv_slowdev
Flushing 0 blocks for cache vg_cache/lv_slowdev.
Logical volume "lv_cachedev" successfully removed
Logical volume vg_cache/lv_slowdev is not cached.
# xfs_io -d -c 'pread -v 254M 512' /dev/mapper/vg_cache-lv_slowdev | head -n 2
0fe00000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
0fe00010: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
This is the case with both v1 and v2 cache pool metatata formats.
After applying this patch:
# vgchange -ay vg_cache
# xfs_io -d -c 'pread -v 254M 512' /dev/mapper/vg_cache-lv_slowdev | head -n 2
0fe00000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
0fe00010: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
# lvconvert --uncache vg_cache/lv_slowdev
Flushing 3724 blocks for cache vg_cache/lv_slowdev.
...
Flushing 71 blocks for cache vg_cache/lv_slowdev.
Logical volume "lv_cachedev" successfully removed
Logical volume vg_cache/lv_slowdev is not cached.
# xfs_io -d -c 'pread -v 254M 512' /dev/mapper/vg_cache-lv_slowdev | head -n 2
0fe00000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
0fe00010: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
Cc: stable@vger.kernel.org
Fixes: f177940a8091 ("dm cache metadata: switch to using the new cursor api for loading metadata")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Commit ae1093be ("dm snapshot: use mutex instead of rw_semaphore")
eliminated the need to worry about read vs write locking. So remove a
FIXME in snapshot_map() that is concerned about selectively taking a
write lock.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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copy_complete()'s processing of out_of_order_list can result in
quadratic complexity in the worst case. As such it was the source of
consuming too much cpu and the source of significant loss in
performance.
Fix this by converting out_of_order_list to an rbtree. This improved
a dm-snapshot test copy workload from 32 seconds to 4 seconds.
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Tested-by: Brett Hull <bhull@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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It was reported that softlockups occur when using dm-snapshot ontop of
slow (rbd) storage. E.g.:
[ 4047.990647] watchdog: BUG: soft lockup - CPU#10 stuck for 22s! [kworker/10:23:26177]
...
[ 4048.034151] Workqueue: kcopyd do_work [dm_mod]
[ 4048.034156] RIP: 0010:copy_callback+0x41/0x160 [dm_snapshot]
...
[ 4048.034190] Call Trace:
[ 4048.034196] ? __chunk_is_tracked+0x70/0x70 [dm_snapshot]
[ 4048.034200] run_complete_job+0x5f/0xb0 [dm_mod]
[ 4048.034205] process_jobs+0x91/0x220 [dm_mod]
[ 4048.034210] ? kcopyd_put_pages+0x40/0x40 [dm_mod]
[ 4048.034214] do_work+0x46/0xa0 [dm_mod]
[ 4048.034219] process_one_work+0x171/0x370
[ 4048.034221] worker_thread+0x1fc/0x3f0
[ 4048.034224] kthread+0xf8/0x130
[ 4048.034226] ? max_active_store+0x80/0x80
[ 4048.034227] ? kthread_bind+0x10/0x10
[ 4048.034231] ret_from_fork+0x35/0x40
[ 4048.034233] Kernel panic - not syncing: softlockup: hung tasks
Fix this by calling cond_resched() after run_complete_job()'s callout to
the dm_kcopyd_notify_fn (which is dm-snap.c:copy_callback in the above
trace).
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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policy_hint_size starts as 0 during __write_initial_superblock(). It
isn't until the policy is loaded that policy_hint_size is set in-core
(cmd->policy_hint_size). But it never got recorded in the on-disk
superblock because __commit_transaction() didn't deal with transfering
the in-core cmd->policy_hint_size to the on-disk superblock.
The in-core cmd->policy_hint_size gets initialized by metadata_open()'s
__begin_transaction_flags() which re-reads all superblock fields.
Because the superblock's policy_hint_size was never properly stored, when
the cache was created, hints_array_available() would always return false
when re-activating a previously created cache. This means
__load_mappings() always considered the hints invalid and never made use
of the hints (these hints served to optimize).
Another detremental side-effect of this oversight is the cache_check
utility would fail with: "invalid hint width: 0"
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Now both check_for_space() and do_no_space_timeout() will read & write
pool->pf.error_if_no_space. If these functions run concurrently, as
shown in the following case, the default setting of "queue_if_no_space"
can get lost.
precondition:
* error_if_no_space = false (aka "queue_if_no_space")
* pool is in Out-of-Data-Space (OODS) mode
* no_space_timeout worker has been queued
CPU 0: CPU 1:
// delete a thin device
process_delete_mesg()
// check_for_space() invoked by commit()
set_pool_mode(pool, PM_WRITE)
pool->pf.error_if_no_space = \
pt->requested_pf.error_if_no_space
// timeout, pool is still in OODS mode
do_no_space_timeout
// "queue_if_no_space" config is lost
pool->pf.error_if_no_space = true
pool->pf.mode = new_mode
Fix it by stopping no_space_timeout worker when switching to write mode.
Fixes: bcc696fac11f ("dm thin: stay in out-of-data-space mode once no_space_timeout expires")
Cc: stable@vger.kernel.org
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm_kcopyd_copy() only ever returns 0 so there is no need for callers to
account for possible failure. Same goes for dm_kcopyd_zero().
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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The metadata low watermark threshold is set by the kernel. But the
kernel depends on userspace to extend the thinpool metadata device when
the threshold is crossed.
Since the metadata low watermark threshold is not visible to userspace,
upon receiving an event, userspace cannot tell that the kernel wants the
metadata device extended, instead of some other eventing condition.
Making it visible (but not settable) enables userspace to affirmatively
know the kernel is asking for a metadata device extension, by comparing
metadata_low_watermark against nr_free_blocks_metadata, also reported in
status.
Current solutions like dmeventd have their own thresholds for extending
the data and metadata devices, and both devices are checked against
their thresholds on each event. This lessens the value of the kernel-set
threshold, since userspace will either extend the metadata device sooner,
when receiving another event; or will receive the metadata lowater event
and do nothing, if dmeventd's threshold is less than the kernel's.
(This second case is dangerous. The metadata lowater event will not be
re-sent, so no further event will be generated before the metadata
device is out if space, unless some other event causes userspace to
recheck its thresholds.)
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Fixes: d284f8248c7 ("dm writecache: support optional offset for start of device")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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In preparing to remove all stack VLA usage from the kernel[1], remove
the discouraged use of AHASH_REQUEST_ON_STACK in favor of the smaller
SHASH_DESC_ON_STACK by converting from ahash-wrapped-shash to direct
shash. The stack allocation will be made a fixed size in a later patch
to the crypto subsystem.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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This is a small simplification of dm-crypt - use wake_up_process()
instead of a wait queue in a case where only one process may be
waiting. dm-writecache uses a similar pattern.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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When using external metadata device and internal hash, recalculate the
checksums when the device is created - so that dm-integrity doesn't
have to overwrite the device. The superblock stores the last position
when the recalculation ended, so that it is properly restarted.
Integrity tags that haven't been recalculated yet are ignored.
Also bump the target version.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Flush the journal on suspend when using separate data and metadata devices,
so that the metadata device can be discarded and the table can be reloaded
with a linear target pointing to the data device.
NOTE: the journal is deliberately not flushed when using the same device
for metadata and data, so that the journal replay code is tested.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Use version "2" in the superblock when data and metadata devices are
separate, so that the device is not accidentally read by older kernel
version.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Add the ability to store DM integrity metadata on a separate device.
This feature is activated with the option "meta_device:/dev/device".
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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A small refactoring. Add the variable ic->start to the result
returned by get_data_sector() and not in the callers. This is a
prerequisite for the commit that adds the ability to use an external
metadata device.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm-integrity locks a range of sectors to prevent concurrent I/O or journal
writeback. These locks were not fair - so that many small overlapping I/Os
could starve a large I/O indefinitely.
Fix this by making the range locks fair. The ranges that are waiting are
added to the list "wait_list". If a new I/O overlaps some of the waiting
I/Os, it is not dispatched, but it is also added to that wait list.
Entries on the wait list are processed in first-in-first-out order, so
that an I/O can't starve indefinitely.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Decouple how dm_integrity_map_continue() responds to being out of free
sectors and when add_new_range() fails.
This has no functional change, but helps prepare for the next commit.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Early alpha processors can't write a byte or short atomically - they
read 8 bytes, modify the byte or two bytes in registers and write back
8 bytes.
The modification of the variable "suspending" may race with
modification of the variable "failed". Fix this by changing
"suspending" to an int.
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Add a new class for dm-delay that delays flush requests. Previously,
flushes were delayed as writes, but it caused problems if the user
needed to create a device with one or a few slow sectors for the purpose
of testing - all flushes would be forwarded to this device and delayed,
and that skews the test results. Fix this by allowing to select 0 delay
for flushes.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm-delay has a lot of code that is repeated for delaying read and write
bios. Repetitive code is generally bad; refactor out the repetitive
code in preperation for adding another delay class for flush bios.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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More than one io_mode feature can be requested when creating a dm cache
device (as is: last one wins). The io_mode selections are incompatible
with one another, we should force them to be selected exclusively. Add
a counter to check for more than one io_mode selection.
Fixes: 629d0a8a1a10 ("dm cache metadata: add "metadata2" feature")
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Documentation/device-mapper-/thin-provisioning.txt's "Status" section no
longer reflected the current fitness level of DM thin-provisioning.
That is, DM thinp is no longer "EXPERIMENTAL". It has since seen
considerable improvement, has been fairly widely deployed and has
performed in a robust manner.
Update Documentation to dispel concern raised by potential DM thinp
users.
Reported-by: Drew Hastings <dhastings@crucialwebhost.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify updates from Jan Kara:
"fsnotify cleanups from Amir and a small inotify improvement"
* tag 'fsnotify_for_v4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
inotify: Add flag IN_MASK_CREATE for inotify_add_watch()
fanotify: factor out helpers to add/remove mark
fsnotify: add helper to get mask from connector
fsnotify: let connector point to an abstract object
fsnotify: pass connp and object type to fsnotify_add_mark()
fsnotify: use typedef fsnotify_connp_t for brevity
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The flag IN_MASK_CREATE is introduced as a flag for inotiy_add_watch()
which prevents inotify from modifying any existing watches when invoked.
If the pathname specified in the call has a watched inode associated
with it and IN_MASK_CREATE is specified, fail with an errno of EEXIST.
Use of IN_MASK_CREATE with IN_MASK_ADD is reserved for future use and
will return EINVAL.
RATIONALE
In the current implementation, there is no way to prevent
inotify_add_watch() from modifying existing watch descriptors. Even if
the caller keeps a record of all watch descriptors collected, this is
only sufficient to detect that an existing watch descriptor may have
been modified.
The assumption that a particular path will map to the same inode over
multiple calls to inotify_add_watch() cannot be made as files can be
renamed or deleted. It is also not possible to assume that two distinct
paths do no map to the same inode, due to hard-links or a dereferenced
symbolic link. Further uses of inotify_add_watch() to revert the change
may cause other watch descriptors to be modified or created, merely
compunding the problem. There is currently no system call such as
inotify_modify_watch() to explicity modify a watch descriptor, which
would be able to revert unwanted changes. Thus the caller cannot
guarantee to be able to revert any changes to existing watch decriptors.
Additionally the caller cannot assume that the events that are
associated with a watch descriptor are within the set requested, as any
future calls to inotify_add_watch() may unintentionally modify a watch
descriptor's mask. Thus it cannot currently be guaranteed that a watch
descriptor will only generate events which have been requested. The
program must filter events which come through its watch descriptor to
within its expected range.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Henry Wilson <henry.wilson@acentic.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Factor out helpers fanotify_add_mark() and fanotify_remove_mark()
to reduce duplicated code.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Use a helper to get the mask from the object (i.e. i_fsnotify_mask)
to generalize code of add/remove inode/vfsmount mark.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Make the code to attach/detach a connector to object more generic
by letting the fsnotify connector point to an abstract fsnotify_connp_t.
Code that needs to dereference an inode or mount object now uses the
helpers fsnotify_conn_{inode,mount}.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Instead of passing inode and vfsmount arguments to fsnotify_add_mark()
and its _locked variant, pass an abstract object pointer and the object
type.
The helpers fsnotify_obj_{inode,mount} are added to get the concrete
object pointer from abstract object pointer.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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The object marks manipulation functions fsnotify_destroy_marks()
fsnotify_find_mark() and their helpers take an argument of type
struct fsnotify_mark_connector __rcu ** to dereference the connector
pointer. use a typedef to describe this type for brevity.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull UDF and ext2 update from Jan Kara.
* tag 'for_v4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: use ktime_get_real_seconds for timestamps
udf: convert inode stamps to timespec64
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get_seconds() is deprecated because of the y2038 overflow, so users
should migrate to 64-bit timestamps using ktime_get_real_seconds().
In ext2, the timestamps in the superblock and in the inode are all
limited to 32-bit, and this won't get fixed, so let's just stop
using the deprecated interface and keep truncating.
All users of ext2 should migrate to ext4 before 2038 to prevent this
from causing problems.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jan Kara <jack@suse.cz>
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The VFS structures are finally converted to always use 64-bit timestamps,
and this file system can represent a long range of on-disk timestamps
already, so now let's fit in the missing bits for udf.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jan Kara <jack@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs updates from Mike Marshall:
"Orangefs: one cleanup and Souptick's vm_fault_t patch:
- add new return type vm_fault_t (Souptick Joarder)
- remove redundant pointer (Colin Ian King)"
* tag 'for-linus-4.19-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: remove redundant pointer orangefs_inode
orangefs: Adding new return type vm_fault_t
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Pointer orangefs_inode is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'orangefs_inode' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
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Use new return type vm_fault_t for fault handler. For now,
this is just documenting that the function returns a VM_FAULT
value rather than an errno. Once all instances are converted,
vm_fault_t will become a distinct type.
See the following
commit 1c8f422059ae ("mm: change return type to vm_fault_t")
Fixed checkpatch.pl warning.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
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Pull VFIO updates from Alex Williamson:
- mark switch fall-through cases (Gustavo A. R. Silva)
- disable binding SR-IOV enabled PFs (Alex Williamson)
* tag 'vfio-v4.19-rc1' of git://github.com/awilliam/linux-vfio:
vfio-pci: Disable binding to PFs with SR-IOV enabled
vfio: Mark expected switch fall-throughs
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We expect to receive PFs with SR-IOV disabled, however some host
drivers leave SR-IOV enabled at unbind. This puts us in a state where
we can potentially assign both the PF and the VF, leading to both
functionality as well as security concerns due to lack of managing the
SR-IOV state as well as vendor dependent isolation from the PF to VF.
If we were to attempt to actively disable SR-IOV on driver probe, we
risk VF bound drivers blocking, potentially risking live lock
scenarios. Therefore simply refuse to bind to PFs with SR-IOV enabled
with a warning message indicating the issue. Users can resolve this
by re-binding to the host driver and disabling SR-IOV before
attempting to use the device with vfio-pci.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
Pull thermal management updates from Eduardo Valentin:
- rework tsens driver to add support for tsens-v2 (Amit Kucheria)
- rework armada thermal driver to use syscon and multichannel support
(Miquel Raynal)
- fixes to TI SoC, IMX, Exynos, RCar, and hwmon drivers
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: (34 commits)
thermal: armada: fix copy-paste error in armada_thermal_probe()
thermal: rcar_thermal: avoid NULL dereference in absence of IRQ resources
thermal: samsung: Remove Exynos5440 clock handling left-overs
thermal: tsens: Fix negative temperature reporting
thermal: tsens: switch from of_iomap() to devm_ioremap_resource()
thermal: tsens: Rename variable
thermal: tsens: Add generic support for TSENS v2 IP
thermal: tsens: Rename tsens-8996 to tsens-v2 for reuse
thermal: tsens: Add support to split up register address space into two
dt: thermal: tsens: Document the fallback DT property for v2 of TSENS IP
thermal: tsens: Get rid of unused fields in structure
thermal_hwmon: Pass the originating device down to hwmon_device_register_with_info
thermal_hwmon: Sanitize attribute name passed to hwmon
dt-bindings: thermal: armada: add reference to new bindings
dt-bindings: cp110: add the thermal node in the syscon file
dt-bindings: cp110: update documentation since DT de-duplication
dt-bindings: ap806: add the thermal node in the syscon file
dt-bindings: cp110: prepare the syscon file to list other syscons nodes
dt-bindings: ap806: prepare the syscon file to list other syscons nodes
dt-bindings: cp110: rename cp110 syscon file
...
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The return value from devm_kzalloc() is not checked correctly. The
test is done against a wrong variable. Fix it.
Fixes: e72f03ef2543 ("thermal: armada: use the resource managed registration helper alternative")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Ensure that the base address used by a call to rcar_thermal_common_write()
may be NULL if the SOC supports interrupts for use with the thermal device
but none are defined in DT as is the case for R-Car H1 (r8a7779). Guard
against this condition to prevent a NULL dereference when the device is
probed.
Tested on:
* R-Mobile APE6 (r8a73a4) / APE6EVM
* R-Car H1 (r8a7779) / Marzen
* R-Car H2 (r8a7790) / Lager
* R-Car M2-W (r8a7791) / Koelsch
* R-Car M2-N (r8a7793) / Gose
* R-Car D3 ES1.0 (r8a77995) / Draak
Fixes: 1969d9dc2079 ("thermal: rcar_thermal: add r8a77995 support")
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Commit 8014220d48e7 ("thermal: samsung: Remove support for Exynos5440")
removed the Exynos5440 specific part of code for accessing TMU interrupt
registers but the surrounding clock handling was left.
Clean it up.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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The current code will always return 0xffffffff in case of negative
temperatures due to a bug in how the binary sign extension is being done.
Use sign_extend32() instead.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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devm_ioremap_resources() automatically requests resources (so that the I/O
region shows up in /proc/iomem) and devm_ wrappers do better error handling
and unmapping of the I/O region when needed.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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We're actually reading the temperature from the status register. Fix the
variable name to reflect that.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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