Before this change, the btrfs_get_io_geometry() function was calling
btrfs_get_chunk_map() to get the extent mapping, necessary for
calculating the I/O geometry. It was using that extent mapping only
internally and freeing the pointer after its execution.
That resulted in calling btrfs_get_chunk_map() de facto twice by the
__btrfs_map_block() function. It was calling btrfs_get_io_geometry()
first and then calling btrfs_get_chunk_map() directly to get the extent
mapping, used by the rest of the function.
Change that to passing the extent mapping to the btrfs_get_io_geometry()
function as an argument.
This could improve performance in some cases. For very large
filesystems, i.e. several thousands of allocated chunks, not only this
avoids searching two times the rbtree, saving time, it may also help
reducing contention on the lock that protects the tree - thinking of
writeback starting for multiple inodes, other tasks allocating or
removing chunks, and anything else that requires access to the rbtree.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Michal Rostecki <mrostecki@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add Filipe's analysis ]
Signed-off-by: David Sterba <dsterba@suse.com>
Commit dbfdb6d1b3 ("Btrfs: Search for all ordered extents that could
span across a page") make btrfs_invalidapage() to search all ordered
extents.
The offending code looks like this:
again:
start = page_start;
ordered = btrfs_lookup_ordered_range(inode, start, page_end - start + 1);
if (ordred) {
end = min(page_end,
ordered->file_offset + ordered->num_bytes - 1);
/* Do the cleanup */
start = end + 1;
if (start < page_end)
goto again;
}
The behavior is indeed necessary for the incoming subpage support, but
when it iterates through all the ordered extents, it also resets the
search range @start.
This means, for the following cases, we can double account the ordered
extents, causing its bytes_left underflow:
Page offset
0 16K 32K
|<--- OE 1 --->|<--- OE 2 ---->|
As the first iteration will find ordered extent (OE) 1, which doesn't
cover the full page, thus after cleanup code, we need to retry again.
But again label will reset start to page_start, and we got OE 1 again,
which causes double accounting on OE 1, and cause OE 1's byte_left to
underflow.
This problem can only happen for subpage case, as for regular sectorsize
== PAGE_SIZE case, we will always find a OE ends at or after page end,
thus no way to trigger the problem.
Move the again label after start = page_start. There will be more
comprehensive rework to convert the open coded loop to a proper while
loop for subpage support.
Fixes: dbfdb6d1b3 ("Btrfs: Search for all ordered extents that could span across a page")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fix the following coccicheck warnings:
./fs/btrfs/delayed-inode.c:1157:39-41: WARNING !A || A && B is
equivalent to !A || B.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Suggested-by: Jiapeng Zhong <oswb@linux.alibaba.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Abaci Team <abaci-bugfix@linux.alibaba.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The comment for can_nocow_extent() says that the function will flush
ordered extents, however that never happens and was never true before the
comment was added in commit e4ecaf90bc ("btrfs: add comments for
btrfs_check_can_nocow() and can_nocow_extent()"). This is true only for
the function btrfs_check_can_nocow(), which after that commit was renamed
to check_can_nocow(). So just remove that part of the comment.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Often when I'm debugging ENOSPC related issues I have to resort to
printing the entire ENOSPC state with trace_printk() in different spots.
This gets pretty annoying, so add a trace state that does this for us.
Then add a trace point at the end of preemptive flushing so you can see
the state of the space_info when we decide to exit preemptive flushing.
This helped me figure out we weren't kicking in the preemptive flushing
soon enough.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since we have normal ticketed flushing and preemptive flushing, adjust
the tracepoint so that we know the source of the flushing action to make
it easier to debug problems.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Starting preemptive flushing at 50% of available free space is a good
start, but some workloads are particularly abusive and can quickly
overwhelm the preemptive flushing code and drive us into using tickets.
Handle this by clamping down on our threshold for starting and
continuing to run preemptive flushing. This is particularly important
for our overcommit case, as we can really drive the file system into
overages and then it's more difficult to pull it back as we start to
actually fill up the file system.
The clamping is essentially 2^CLAMP, but we start at 1 so whatever we
calculate for overcommit is the baseline.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A lot of this was added all in one go with no explanation, and is a bit
unwieldy and confusing. Simplify the logic to start preemptive flushing
if we've reserved more than half of our available free space.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently btrfs_calc_reclaim_metadata_size does two things, it returns
the space currently required for flushing by the tickets, and if there
are no tickets it calculates a value for the preemptive flushing.
However for the normal ticketed flushing we really only care about the
space required for tickets. We will accidentally come in and flush one
time, but as soon as we see there are no tickets we bail out of our
flushing.
Fix this by making btrfs_calc_reclaim_metadata_size really only tell us
what is required for flushing if we have people waiting on space. Then
move the preemptive flushing logic into need_preemptive_reclaim(). We
ignore btrfs_calc_reclaim_metadata_size() in need_preemptive_reclaim()
because if we are in this path then we made our reservation and there
are not pending tickets currently, so we do not need to check it, simply
do the fuzzy logic to check if we're getting low on space.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
If we're flushing space for tickets then we have
space_info->reclaim_size set and we do not need to do background
reclaim.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
All of our normal flushing is asynchronous reclaim, so this helper is
poorly named. This is more checking if we need to preemptively flush
space, so rename it to need_preemptive_reclaim.
Also switch it to bool and make it plain static as followup patches will
move more code here.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently if we ever have to flush space because we do not have enough
we allocate a ticket and attach it to the space_info, and then
systematically flush things in the filesystem that hold space
reservations until our space is reclaimed.
However this has a latency cost, we must go to sleep and wait for the
flushing to make progress before we are woken up and allowed to continue
doing our work.
In order to address that we used to kick off the async worker to flush
space preemptively, so that we could be reclaiming space hopefully
before any tasks needed to stop and wait for space to reclaim.
When I introduced the ticketed ENOSPC stuff this broke slightly in the
fact that we were using tickets to indicate if we were done flushing.
No tickets, no more flushing. However this meant that we essentially
never preemptively flushed. This caused a write performance regression
that Nikolay noticed in an unrelated patch that removed the committing
of the transaction during btrfs_end_transaction.
The behavior that happened pre that patch was btrfs_end_transaction()
would see that we were low on space, and it would commit the
transaction. This was bad because in this particular case you could end
up with thousands and thousands of transactions being committed during
the 5 minute reproducer. With the patch to remove this behavior we got
much more sane transaction commits, but we ended up slower because we
would write for a while, flush, write for a while, flush again.
To address this we need to reinstate a preemptive flushing mechanism.
However it is distinctly different from our ticketing flushing in that
it doesn't have tickets to base it's decisions on. Instead of bolting
this logic into our existing flushing work, add another worker to handle
this preemptive flushing. Here we will attempt to be slightly
intelligent about the things that we flushing, attempting to balance
between whichever pool is taking up the most space.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Solely for preemptive flushing, we want to be able to force the
transaction commit without any of the ambiguity of
may_commit_transaction(). This is because may_commit_transaction()
checks tickets and such, and in preemptive flushing we already know
it'll be helpful, so use this to keep the code nice and clean and
straightforward.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ add comment ]
Signed-off-by: David Sterba <dsterba@suse.com>
We track dio_bytes because the shrink delalloc code needs to know if we
have more DIO in flight than we have normal buffered IO. The reason for
this is because we can't "flush" DIO, we have to just wait on the
ordered extents to finish.
However this is true of all ordered extents. If we have more ordered
space outstanding than dirty pages we should be waiting on ordered
extents. We already are ok on this front technically, because we always
do a FLUSH_DELALLOC_WAIT loop, but I want to use the ordered counter in
the preemptive flushing code as well, so change this to count all
ordered bytes instead of just DIO ordered bytes.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While debugging a ENOSPC related performance problem I needed to see the
time difference between start and end of a reserve ticket, so add a
trace point to report when we handle a reserve ticket.
I opted to spit out start_ns itself without calculating the difference
because there could be a gap between enabling the tracepoint and setting
start_ns. Doing it this way allows us to filter on 0 start_ns so we
don't get bogus entries, and we can easily calculate the time difference
with bpftrace or something else.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
I got a automated message from somebody who runs clang against our
kernels and it's because I used the wrong enum type for what I passed
into flush_space, caught by -Wenum-conversion. Change the argument to
be explicitly the enum we're expecting to make everything consistent.
Maybe eventually gcc will catch errors like this.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_compare_trees and changed_cb use a void *ctx parameter instead of
struct send_ctx *sctx but when used in changed_cb it is immediately
cast to `struct send_ctx *sctx = ctx;`.
changed_cb is only ever called from btrfs_compare_trees and full_send_tree:
- full_send_tree already passes a struct send_ctx *sctx
- btrfs_compare_trees is only called by send_subvol with a struct send_ctx *sctx
- void *ctx in btrfs_compare_trees is only used to be passed to changed_cb
So casting to/from void *ctx seems unnecessary and directly using
struct send_ctx *sctx instead provides better type-safety.
The original reason for using void *ctx in the first place seems to have
been dropped with 1b51d6fce4 ("btrfs: send: remove indirect callback
parameter for changed_cb").
Signed-off-by: Roman Anasal <roman.anasal@bdsu.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We love running delayed refs in commit_cowonly_roots, but it is a bit
excessive. I was seeing cases of running 3 or 4 refs a few times in a
row during this time. Instead simply:
- update all of the roots first
- then run delayed refs
- then handle the empty block groups case
- and then if we have any more dirty roots do the whole thing again
This allows us to be much more efficient with our delayed ref running,
as we can batch a few more operations at once.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This was added in commit 361048f586 ("Btrfs: fix full backref problem
when inserting shared block reference") to address a problem where we
hit the following BUG_ON() in alloc_reserved_tree_block
if (node->type == BTRFS_SHARED_BLOCK_REF_KEY) {
BUG_ON(!(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF));
However this BUG_ON() is bogus, and was removed by previous commit:
btrfs: remove bogus BUG_ON in alloc_reserved_tree_block
We no longer need to run delayed refs because of this, and can remove
this flushing here.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The fix 361048f586 ("Btrfs: fix full backref problem when inserting
shared block reference") added a delayed ref flushing at subvolume
creation time in order to avoid hitting this particular BUG_ON().
Before this fix, we were tripping the BUG_ON() by
1. Modify snapshot A, which creates blocks with a normal reference for
snapshot A, as A is the owner of these blocks. We now have delayed
refs for these blocks.
2. Create a snapshot of A named B, which pushes references for the
children blocks of the root node for the new root B, thus creating
more delayed refs for newly allocated blocks.
3. A is modified, and because the metadata blocks can now be shared, it
must push FULL_BACKREF references to the children of any block that A
COWs down it's path to its target key.
4. Delayed refs are run. Because these are newly allocated blocks, we
have ->must_insert_reserved reserved set on the delayed ref head, we
call into alloc_reserved_tree_block() to add the extent item, and
then add our ref. At the time of this fix, we were ordering
FULL_BACKREF delayed ref operations first, so we'd go to add this
reference and then BUG_ON() because we didn't have the FULL_BACKREF
flag set.
The patch fixed this problem by making sure we ran the delayed refs
before we had the chance to modify A. This meant that any *new* blocks
would have had their extent items created _before_ we would ever
actually COW down and generate FULL_BACKREF entries. Thus the problem
went away.
However this BUG_ON() is actually completely bogus. The existence of a
full backref doesn't necessarily mean that FULL_BACKREF must be set on
that block, it must only be set on the actual parent itself. Consider
the example provided above. If we COW down one path from A, any nodes
are going to have a FULL_BACKREF ref pushed down to _all_ of their
children, but not all of the children are going to have FULL_BACKREF
set. It is completely valid to have an extent item with normal and full
backrefs without FULL_BACKREF actually set on the block itself.
As a final note, I have been testing with the patch (applied after this
one)
btrfs: stop running all delayed refs during snapshot
which removed this flushing. My test was a torture test which did a lot
of operations while snapshotting and deleting snapshots as well as
relocation, and I never tripped this BUG_ON(). This is actually because
at the time of 361048f586, we ordered SHARED keys _before_ normal
references, and thus they would get run first. However currently they
are ordered _after_ normal references, so we'd do the initial creation
without having a shared reference, and thus not hit this BUG_ON(), which
explains why I didn't start hitting this problem during my testing with
my other patch applied.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The commit d672633545 ("btrfs: qgroup: Make snapshot accounting work
with new extent-oriented qgroup.") added a flush of the delayed refs
during snapshot creation in order to get the qgroup accounting properly.
However this code has changed and been moved to it's own helper that is
skipped if qgroups are turned off. Move the flushing to the helper, as
we do not need it when qgroups are turned off.
Also add a comment explaining why it exists, and why it doesn't actually
save us. This will be helpful later when we try to fix qgroup
accounting properly.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We try to pre-flush the delayed refs when committing, because we want to
do as little work as possible in the critical section of the transaction
commit.
However doing this twice can lead to very long transaction commit delays
as other threads are allowed to continue to generate more delayed refs,
which potentially delays the commit by multiple minutes in very extreme
cases.
So simply stick to one pre-flush, and then continue the rest of the
transaction commit.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Previously our delayed ref running used the total number of items as the
items to run. However we changed that to number of heads to run with
the delayed_refs_rsv, as generally we want to run all of the operations
for one bytenr.
But with btrfs_run_delayed_refs(trans, 0) we set our count to 2x the
number of items that we have. This is generally fine, but if we have
some operation generation loads of delayed refs while we're doing this
pre-flushing in the transaction commit, we'll just spin forever doing
delayed refs.
Fix this to simply pick the number of delayed refs we currently have,
that way we do not end up doing a lot of extra work that's being
generated in other threads.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
I've been running a stress test that runs 20 workers in their own
subvolume, which are running an fsstress instance with 4 threads per
worker, which is 80 total fsstress threads. In addition to this I'm
running balance in the background as well as creating and deleting
snapshots. This test takes around 12 hours to run normally, going
slower and slower as the test goes on.
The reason for this is because fsstress is running fsync sometimes, and
because we're messing with block groups we often fall through to
btrfs_commit_transaction, so will often have 20-30 threads all calling
btrfs_commit_transaction at the same time.
These all get stuck contending on the extent tree while they try to run
delayed refs during the initial part of the commit.
This is suboptimal, really because the extent tree is a single point of
failure we only want one thread acting on that tree at once to reduce
lock contention.
Fix this by making the flushing mechanism a bit operation, to make it
easy to use test_and_set_bit() in order to make sure only one task does
this initial flush.
Once we're into the transaction commit we only have one thread doing
delayed ref running, it's just this initial pre-flush that is
problematic. With this patch my stress test takes around 90 minutes to
run, instead of 12 hours.
The memory barrier is not necessary for the flushing bit as it's
ordered, unlike plain int. The transaction state accessed in
btrfs_should_end_transaction could be affected by that too as it's not
always used under transaction lock. Upon Nikolay's analysis in [1]
it's not necessary:
In should_end_transaction it's read without holding any locks. (U)
It's modified in btrfs_cleanup_transaction without holding the
fs_info->trans_lock (U), but the STATE_ERROR flag is going to be set.
set in cleanup_transaction under fs_info->trans_lock (L)
set in btrfs_commit_trans to COMMIT_START under fs_info->trans_lock.(L)
set in btrfs_commit_trans to COMMIT_DOING under fs_info->trans_lock.(L)
set in btrfs_commit_trans to COMMIT_UNBLOCK under
fs_info->trans_lock.(L)
set in btrfs_commit_trans to COMMIT_COMPLETED without locks but at this
point the transaction is finished and fs_info->running_trans is NULL (U
but irrelevant).
So by the looks of it we can have a concurrent READ race with a WRITE,
due to reads not taking a lock. In this case what we want to ensure is
we either see new or old state. I consulted with Will Deacon and he said
that in such a case we'd want to annotate the accesses to ->state with
(READ|WRITE)_ONCE so as to avoid a theoretical tear, in this case I
don't think this could happen but I imagine at some point KCSAN would
flag such an access as racy (which it is).
[1] https://lore.kernel.org/linux-btrfs/e1fd5cc1-0f28-f670-69f4-e9958b4964e6@suse.com
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ add comments regarding memory barrier ]
Signed-off-by: David Sterba <dsterba@suse.com>
While running some stress tests I started getting hung task messages.
This is because the delete unused block groups code has to take the
delete_unused_bgs_mutex to do it's work, which is taken by balance to
make sure we don't delete block groups while we're balancing.
The problem is that balance can take a while, and so we were getting
hung task warnings. We don't need to block and run these things, and
the cleaner is needed to do other work, so trylock on this mutex and
just bail if we can't acquire it right away.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While testing my error handling patches, I added a error injection site
at btrfs_inc_extent_ref, to validate the error handling I added was
doing the correct thing. However I hit a pretty ugly corruption while
doing this check, with the following error injection stack trace:
btrfs_inc_extent_ref
btrfs_copy_root
create_reloc_root
btrfs_init_reloc_root
btrfs_record_root_in_trans
btrfs_start_transaction
btrfs_update_inode
btrfs_update_time
touch_atime
file_accessed
btrfs_file_mmap
This is because we do not catch the error from btrfs_inc_extent_ref,
which in practice would be ENOMEM, which means we lose the extent
references for a root that has already been allocated and inserted,
which is the problem. Fix this by aborting the transaction if we fail
to do the reference modification.
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A weird KASAN problem that Zygo reported could have been easily caught
if we checked for basic things in our backref freeing code. We have two
methods of freeing a backref node
- btrfs_backref_free_node: this just is kfree() essentially.
- btrfs_backref_drop_node: this actually unlinks the node and cleans up
everything and then calls btrfs_backref_free_node().
We should mostly be using btrfs_backref_drop_node(), to make sure the
node is properly unlinked from the backref cache, and only use
btrfs_backref_free_node() when we know the node isn't actually linked to
the backref cache. We made a mistake here and thus got the KASAN splat.
Make this style of issue easier to find by adding some ASSERT()'s to
btrfs_backref_free_node() and adjusting our deletion stuff to properly
init the list so we can rely on list_empty() checks working properly.
BUG: KASAN: use-after-free in btrfs_backref_cleanup_node+0x18a/0x420
Read of size 8 at addr ffff888112402950 by task btrfs/28836
CPU: 0 PID: 28836 Comm: btrfs Tainted: G W 5.10.0-e35f27394290-for-next+ #23
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack+0xbc/0xf9
? btrfs_backref_cleanup_node+0x18a/0x420
print_address_description.constprop.8+0x21/0x210
? record_print_text.cold.34+0x11/0x11
? btrfs_backref_cleanup_node+0x18a/0x420
? btrfs_backref_cleanup_node+0x18a/0x420
kasan_report.cold.10+0x20/0x37
? btrfs_backref_cleanup_node+0x18a/0x420
__asan_load8+0x69/0x90
btrfs_backref_cleanup_node+0x18a/0x420
btrfs_backref_release_cache+0x83/0x1b0
relocate_block_group+0x394/0x780
? merge_reloc_roots+0x4a0/0x4a0
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
? check_flags.part.50+0x6c/0x1e0
? btrfs_relocate_chunk+0x120/0x120
? kmem_cache_alloc_trace+0xa06/0xcb0
? _copy_from_user+0x83/0xc0
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
? __kasan_check_read+0x11/0x20
? check_chain_key+0x1f4/0x2f0
? __asan_loadN+0xf/0x20
? btrfs_ioctl_get_supported_features+0x30/0x30
? kvm_sched_clock_read+0x18/0x30
? check_chain_key+0x1f4/0x2f0
? lock_downgrade+0x3f0/0x3f0
? handle_mm_fault+0xad6/0x2150
? do_vfs_ioctl+0xfc/0x9d0
? ioctl_file_clone+0xe0/0xe0
? check_flags.part.50+0x6c/0x1e0
? check_flags.part.50+0x6c/0x1e0
? check_flags+0x26/0x30
? lock_is_held_type+0xc3/0xf0
? syscall_enter_from_user_mode+0x1b/0x60
? do_syscall_64+0x13/0x80
? rcu_read_lock_sched_held+0xa1/0xd0
? __kasan_check_read+0x11/0x20
? __fget_light+0xae/0x110
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4c4bdfe427
RSP: 002b:00007fff33ee6df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fff33ee6e98 RCX: 00007f4c4bdfe427
RDX: 00007fff33ee6e98 RSI: 00000000c4009420 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
R10: fffffffffffff59d R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fff33ee8a34 R15: 0000000000000001
Allocated by task 28836:
kasan_save_stack+0x21/0x50
__kasan_kmalloc.constprop.18+0xbe/0xd0
kasan_kmalloc+0x9/0x10
kmem_cache_alloc_trace+0x410/0xcb0
btrfs_backref_alloc_node+0x46/0xf0
btrfs_backref_add_tree_node+0x60d/0x11d0
build_backref_tree+0xc5/0x700
relocate_tree_blocks+0x2be/0xb90
relocate_block_group+0x2eb/0x780
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 28836:
kasan_save_stack+0x21/0x50
kasan_set_track+0x20/0x30
kasan_set_free_info+0x1f/0x30
__kasan_slab_free+0xf3/0x140
kasan_slab_free+0xe/0x10
kfree+0xde/0x200
btrfs_backref_error_cleanup+0x452/0x530
build_backref_tree+0x1a5/0x700
relocate_tree_blocks+0x2be/0xb90
relocate_block_group+0x2eb/0x780
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff888112402900
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 80 bytes inside of
128-byte region [ffff888112402900, ffff888112402980)
The buggy address belongs to the page:
page:0000000028b1cd08 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888131c810c0 pfn:0x112402
flags: 0x17ffe0000000200(slab)
raw: 017ffe0000000200 ffffea000424f308 ffffea0007d572c8 ffff888100040440
raw: ffff888131c810c0 ffff888112402000 0000000100000009 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888112402800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888112402880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888112402900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888112402980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888112402a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
Link: https://lore.kernel.org/linux-btrfs/20201208194607.GI31381@hungrycats.org/
CC: stable@vger.kernel.org # 5.10+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The backref code is looking for a reloc_root that corresponds to the
given fs root. However any number of things could have gone wrong while
initializing that reloc_root, like ENOMEM while trying to allocate the
root itself, or EIO while trying to write the root item. This would
result in no corresponding reloc_root being in the reloc root cache, and
thus would return NULL when we do the find_reloc_root() call.
Because of this we do not want to WARN_ON(). This presumably was meant
to catch developer errors, cases where we messed up adding the reloc
root. However we can easily hit this case with error injection, and
thus should not do a WARN_ON().
CC: stable@vger.kernel.org # 5.10+
Reported-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While doing error injection testing with my relocation patches I hit the
following assert:
assertion failed: list_empty(&block_group->dirty_list), in fs/btrfs/block-group.c:3356
------------[ cut here ]------------
kernel BUG at fs/btrfs/ctree.h:3357!
invalid opcode: 0000 [#1] SMP NOPTI
CPU: 0 PID: 24351 Comm: umount Tainted: G W 5.10.0-rc3+ #193
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
RIP: 0010:assertfail.constprop.0+0x18/0x1a
RSP: 0018:ffffa09b019c7e00 EFLAGS: 00010282
RAX: 0000000000000056 RBX: ffff8f6492c18000 RCX: 0000000000000000
RDX: ffff8f64fbc27c60 RSI: ffff8f64fbc19050 RDI: ffff8f64fbc19050
RBP: ffff8f6483bbdc00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffa09b019c7c38 R11: ffffffff85d70928 R12: ffff8f6492c18100
R13: ffff8f6492c18148 R14: ffff8f6483bbdd70 R15: dead000000000100
FS: 00007fbfda4cdc40(0000) GS:ffff8f64fbc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbfda666fd0 CR3: 000000013cf66002 CR4: 0000000000370ef0
Call Trace:
btrfs_free_block_groups.cold+0x55/0x55
close_ctree+0x2c5/0x306
? fsnotify_destroy_marks+0x14/0x100
generic_shutdown_super+0x6c/0x100
kill_anon_super+0x14/0x30
btrfs_kill_super+0x12/0x20
deactivate_locked_super+0x36/0xa0
cleanup_mnt+0x12d/0x190
task_work_run+0x5c/0xa0
exit_to_user_mode_prepare+0x1b1/0x1d0
syscall_exit_to_user_mode+0x54/0x280
entry_SYSCALL_64_after_hwframe+0x44/0xa9
This happened because I injected an error in btrfs_cow_block() while
running the dirty block groups. When we run the dirty block groups, we
splice the list onto a local list to process. However if an error
occurs, we only cleanup the transactions dirty block group list, not any
pending block groups we have on our locally spliced list.
In fact if we fail to allocate a path in this function we'll also fail
to clean up the splice list.
Fix this by splicing the list back onto the transaction dirty block
group list so that the block groups are cleaned up. Then add a 'out'
label and have the error conditions jump to out so that the errors are
handled properly. This also has the side-effect of fixing a problem
where we would clear 'ret' on error because we unconditionally ran
btrfs_run_delayed_refs().
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When recovering a relocation, if we run into a reloc root that has 0
refs we simply add it to the reloc_control->reloc_roots list, and then
clean it up later. The problem with this is __del_reloc_root() doesn't
do anything if the root isn't in the radix tree, which in this case it
won't be because we never call __add_reloc_root() on the reloc_root.
This exit condition simply isn't correct really. During normal
operation we can remove ourselves from the rb tree and then we're meant
to clean up later at merge_reloc_roots() time, and this happens
correctly. During recovery we're depending on free_reloc_roots() to
drop our references, but we're short-circuiting.
Fix this by continuing to check if we're on the list and dropping
ourselves from the reloc_control root list and dropping our reference
appropriately. Change the corresponding BUG_ON() to an ASSERT() that
does the correct thing if we aren't in the rb tree.
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Comment for processed extent end of range has an unnecessary "in",
remove it.
Signed-off-by: Nigel Christian <nigel.l.christian@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
My recent patch set "A variety of lock contention fixes", found here
https://lore.kernel.org/linux-btrfs/cover.1608319304.git.josef@toxicpanda.com/
(Tracked in https://github.com/btrfs/linux/issues/86)
that reduce lock contention on the extent root by running delayed refs
less often resulted in a regression in generic/371. This test
fallocate()'s the fs until it's full, deletes all the files, and then
tries to fallocate() until full again.
Before these patches we would run all of the delayed refs during
flushing, and then would commit the transaction because we had plenty of
pinned space to recover in order to allocate. However my patches made
it so we weren't running the delayed refs as aggressively, which meant
that we appeared to have less pinned space when we were deciding to
commit the transaction.
We use the space_info->total_bytes_pinned to approximate how much space
we have pinned. It's approximate because if we remove a reference to an
extent we may free it, but there may be more references to it than we
know of at that point, but we account it as pinned at the creation time,
and then it's properly accounted when the delayed ref runs.
The way we account for pinned space is if the
delayed_ref_head->total_ref_mod is < 0, because that is clearly a
freeing option. However there is another case, and that is where
->total_ref_mod == 0 && ->must_insert_reserved == 1.
When we allocate a new extent, we have ->total_ref_mod == 1 and we have
->must_insert_reserved == 1. This is used to indicate that it is a
brand new extent and will need to have its extent entry added before we
modify any references on the delayed ref head. But if we subsequently
remove that extent reference, our ->total_ref_mod will be 0, and that
space will be pinned and freed. Accounting for this case properly
allows for generic/371 to pass with my delayed refs patches applied.
It's important to note that this problem exists without the referenced
patches, it just was uncovered by them.
CC: stable@vger.kernel.org # 5.10
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently we pass things around to figure out if we maybe freeing data
based on the state of the delayed refs head. This makes the accounting
sort of confusing and hard to follow, as it's distinctly separate from
the delayed ref heads stuff, but also depends on it entirely.
Fix this by explicitly adjusting the space_info->total_bytes_pinned in
the delayed refs code. We now have two places where we modify this
counter, once where we create the delayed and destroy the delayed refs,
and once when we pin and unpin the extents. This means there is a
slight overlap between delayed refs and the pin/unpin mechanisms, but
this is simply used by the ENOSPC infrastructure to determine if we need
to commit the transaction, so there's no adverse affect from this, we
might simply commit thinking it will give us enough space when it might
not.
CC: stable@vger.kernel.org # 5.10
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that the btrfs' codebase is clean of almost all W=1 warnings let's
enable those checks unconditionally for the entire fs/btrfs/ and its
subdirectories to catch potential errors during development.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add some comments ]
Signed-off-by: David Sterba <dsterba@suse.com>
This fixes warning:
fs/btrfs/zoned.c:491:6: warning: variable ‘zone_size’ set but not used [-Wunused-but-set-variable]
491 | u64 zone_size;
which got introduced in 12659251ca ("btrfs: implement log-structured
superblock for ZONED mode"). We'll enable the warning by default and
want clean build until the relevant zoned patches land.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This makes the file W=1 clean and fixes the following warnings:
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'tree' not described in '__etree_search'
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'offset' not described in '__etree_search'
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'next_ret' not described in '__etree_search'
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'prev_ret' not described in '__etree_search'
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'p_ret' not described in '__etree_search'
fs/btrfs/extent_io.c:414: warning: Function parameter or member 'parent_ret' not described in '__etree_search'
fs/btrfs/extent_io.c:1607: warning: Function parameter or member 'tree' not described in 'find_contiguous_extent_bit'
fs/btrfs/extent_io.c:1607: warning: Function parameter or member 'start' not described in 'find_contiguous_extent_bit'
fs/btrfs/extent_io.c:1607: warning: Function parameter or member 'start_ret' not described in 'find_contiguous_extent_bit'
fs/btrfs/extent_io.c:1607: warning: Function parameter or member 'end_ret' not described in 'find_contiguous_extent_bit'
fs/btrfs/extent_io.c:1607: warning: Function parameter or member 'bits' not described in 'find_contiguous_extent_bit'
fs/btrfs/extent_io.c:1644: warning: Function parameter or member 'tree' not described in 'find_first_clear_extent_bit'
fs/btrfs/extent_io.c:1644: warning: Function parameter or member 'start' not described in 'find_first_clear_extent_bit'
fs/btrfs/extent_io.c:1644: warning: Function parameter or member 'start_ret' not described in 'find_first_clear_extent_bit'
fs/btrfs/extent_io.c:1644: warning: Function parameter or member 'end_ret' not described in 'find_first_clear_extent_bit'
fs/btrfs/extent_io.c:1644: warning: Function parameter or member 'bits' not described in 'find_first_clear_extent_bit'
fs/btrfs/extent_io.c:4187: warning: Function parameter or member 'epd' not described in 'extent_write_cache_pages'
fs/btrfs/extent_io.c:4187: warning: Excess function parameter 'data' description in 'extent_write_cache_pages'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
With these fixes space-info.c is clear for W=1 warnings, namely the
following ones are fixed:
fs/btrfs/space-info.c:575: warning: Function parameter or member 'fs_info' not described in 'may_commit_transaction'
fs/btrfs/space-info.c:575: warning: Function parameter or member 'space_info' not described in 'may_commit_transaction'
fs/btrfs/space-info.c:1231: warning: Function parameter or member 'fs_info' not described in 'handle_reserve_ticket'
fs/btrfs/space-info.c:1231: warning: Function parameter or member 'space_info' not described in 'handle_reserve_ticket'
fs/btrfs/space-info.c:1231: warning: Function parameter or member 'ticket' not described in 'handle_reserve_ticket'
fs/btrfs/space-info.c:1231: warning: Function parameter or member 'flush' not described in 'handle_reserve_ticket'
fs/btrfs/space-info.c:1315: warning: Function parameter or member 'fs_info' not described in '__reserve_bytes'
fs/btrfs/space-info.c:1315: warning: Function parameter or member 'space_info' not described in '__reserve_bytes'
fs/btrfs/space-info.c:1315: warning: Function parameter or member 'orig_bytes' not described in '__reserve_bytes'
fs/btrfs/space-info.c:1315: warning: Function parameter or member 'flush' not described in '__reserve_bytes'
fs/btrfs/space-info.c:1427: warning: Function parameter or member 'root' not described in 'btrfs_reserve_metadata_bytes'
fs/btrfs/space-info.c:1427: warning: Function parameter or member 'block_rsv' not described in 'btrfs_reserve_metadata_bytes'
fs/btrfs/space-info.c:1427: warning: Function parameter or member 'orig_bytes' not described in 'btrfs_reserve_metadata_bytes'
fs/btrfs/space-info.c:1427: warning: Function parameter or member 'flush' not described in 'btrfs_reserve_metadata_bytes'
fs/btrfs/space-info.c:1462: warning: Function parameter or member 'fs_info' not described in 'btrfs_reserve_data_bytes'
fs/btrfs/space-info.c:1462: warning: Function parameter or member 'bytes' not described in 'btrfs_reserve_data_bytes'
fs/btrfs/space-info.c:1462: warning: Function parameter or member 'flush' not described in 'btrfs_reserve_data_bytes'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes following warnings:
fs/btrfs/delalloc-space.c:205: warning: Function parameter or member 'inode' not described in 'btrfs_inode_rsv_release'
fs/btrfs/delalloc-space.c:205: warning: Function parameter or member 'qgroup_free' not described in 'btrfs_inode_rsv_release'
fs/btrfs/delalloc-space.c:472: warning: Function parameter or member 'reserved' not described in 'btrfs_delalloc_release_space'
fs/btrfs/delalloc-space.c:472: warning: Function parameter or member 'qgroup_free' not described in 'btrfs_delalloc_release_space'
fs/btrfs/delalloc-space.c:472: warning: Excess function parameter 'release_bytes' description in 'btrfs_delalloc_release_space'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes fs/btrfs/inode.c:3101: warning: Function parameter or member 'fs_info' not described in 'btrfs_wait_on_delayed_iputs'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes fs/btrfs/block-group.c:1570: warning: Function parameter or member 'fs_info' not described in 'btrfs_rmap_block'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes fs/btrfs/discard.c:203: warning: Function parameter or member 'now' not described in 'peek_discard_list'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes following W=1 warnings:
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'root' not described in '__btrfs_write_out_cache'
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'inode' not described in '__btrfs_write_out_cache'
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'ctl' not described in '__btrfs_write_out_cache'
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'block_group' not described in '__btrfs_write_out_cache'
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'io_ctl' not described in '__btrfs_write_out_cache'
fs/btrfs/free-space-cache.c:1317: warning: Function parameter or member 'trans' not described in '__btrfs_write_out_cache'
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This fixes the following warnings:
fs/btrfs/delayed-ref.c:80: warning: Function parameter or member 'fs_info' not described in 'btrfs_delayed_refs_rsv_release'
fs/btrfs/delayed-ref.c:80: warning: Function parameter or member 'nr' not described in 'btrfs_delayed_refs_rsv_release'
fs/btrfs/delayed-ref.c:128: warning: Function parameter or member 'fs_info' not described in 'btrfs_migrate_to_delayed_refs_rsv'
fs/btrfs/delayed-ref.c:128: warning: Function parameter or member 'src' not described in 'btrfs_migrate_to_delayed_refs_rsv'
fs/btrfs/delayed-ref.c:128: warning: Function parameter or member 'num_bytes' not described in 'btrfs_migrate_to_delayed_refs_rsv'
fs/btrfs/delayed-ref.c:174: warning: Function parameter or member 'fs_info' not described in 'btrfs_delayed_refs_rsv_refill'
fs/btrfs/delayed-ref.c:174: warning: Function parameter or member 'flush' not described in 'btrfs_delayed_refs_rsv_refill'
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This fixes following W=1 warnings:
fs/btrfs/file-item.c:27: warning: Cannot understand * @inode: the inode we want to update the disk_i_size for
on line 27 - I thought it was a doc line
fs/btrfs/file-item.c:65: warning: Cannot understand * @inode - the inode we're modifying
on line 65 - I thought it was a doc line
fs/btrfs/file-item.c:91: warning: Cannot understand * @inode - the inode we're modifying
on line 91 - I thought it was a doc line
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This fixes the following compiler warnings:
fs/btrfs/extent_map.c:601: warning: Function parameter or member 'fs_info' not described in 'btrfs_add_extent_mapping'
fs/btrfs/extent_map.c:601: warning: Function parameter or member 'em_tree' not described in 'btrfs_add_extent_mapping'
fs/btrfs/extent_map.c:601: warning: Function parameter or member 'em_in' not described in 'btrfs_add_extent_mapping'
fs/btrfs/extent_map.c:601: warning: Function parameter or member 'start' not described in 'btrfs_add_extent_mapping'
fs/btrfs/extent_map.c:601: warning: Function parameter or member 'len' not described in 'btrfs_add_extent_mapping'
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fixes fs/btrfs/extent_map.c:399: warning: Function parameter or member
'modified' not described in 'add_extent_mapping'
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
There is a long existing bug in the last parameter of
btrfs_add_ordered_extent(), in commit 771ed689d2 ("Btrfs: Optimize
compressed writeback and reads") back to 2008.
In that ancient commit btrfs_add_ordered_extent() expects the @type
parameter to be one of the following:
- BTRFS_ORDERED_REGULAR
- BTRFS_ORDERED_NOCOW
- BTRFS_ORDERED_PREALLOC
- BTRFS_ORDERED_COMPRESSED
But we pass 0 in cow_file_range(), which means BTRFS_ORDERED_IO_DONE.
Ironically extra check in __btrfs_add_ordered_extent() won't set the bit
if we see (type == IO_DONE || type == IO_COMPLETE), and avoid any
obvious bug.
But this still leads to regular COW ordered extent having no bit to
indicate its type in various trace events, rendering REGULAR bit
useless.
[FIX]
Change the following aspects to avoid such problem:
- Reorder btrfs_ordered_extent::flags
Now the type bits go first (REGULAR/NOCOW/PREALLCO/COMPRESSED), then
DIRECT bit, finally extra status bits like IO_DONE/COMPLETE/IOERR.
- Add extra ASSERT() for btrfs_add_ordered_extent_*()
- Remove @type parameter for btrfs_add_ordered_extent_compress()
As the only valid @type here is BTRFS_ORDERED_COMPRESSED.
- Remove the unnecessary special check for IO_DONE/COMPLETE in
__btrfs_add_ordered_extent()
This is just to make the code work, with extra ASSERT(), there are
limited values can be passed in.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Fix below warnings reported by coccicheck:
./fs/btrfs/raid56.c:237:2-8: WARNING: NULL check before some freeing
functions is not needed.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Yang Li <abaci-bugfix@linux.alibaba.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Zygo reported the following panic when testing my error handling patches
for relocation:
kernel BUG at fs/btrfs/backref.c:2545!
invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 3 PID: 8472 Comm: btrfs Tainted: G W 14
Hardware name: QEMU Standard PC (i440FX + PIIX,
Call Trace:
btrfs_backref_error_cleanup+0x4df/0x530
build_backref_tree+0x1a5/0x700
? _raw_spin_unlock+0x22/0x30
? release_extent_buffer+0x225/0x280
? free_extent_buffer.part.52+0xd7/0x140
relocate_tree_blocks+0x2a6/0xb60
? kasan_unpoison_shadow+0x35/0x50
? do_relocation+0xc10/0xc10
? kasan_kmalloc+0x9/0x10
? kmem_cache_alloc_trace+0x6a3/0xcb0
? free_extent_buffer.part.52+0xd7/0x140
? rb_insert_color+0x342/0x360
? add_tree_block.isra.36+0x236/0x2b0
relocate_block_group+0x2eb/0x780
? merge_reloc_roots+0x470/0x470
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x18f0
? pvclock_clocksource_read+0xeb/0x190
? btrfs_relocate_chunk+0x120/0x120
? lock_contended+0x620/0x6e0
? do_raw_spin_lock+0x1e0/0x1e0
? do_raw_spin_unlock+0xa8/0x140
btrfs_ioctl_balance+0x1f9/0x460
btrfs_ioctl+0x24c8/0x4380
? __kasan_check_read+0x11/0x20
? check_chain_key+0x1f4/0x2f0
? __asan_loadN+0xf/0x20
? btrfs_ioctl_get_supported_features+0x30/0x30
? kvm_sched_clock_read+0x18/0x30
? check_chain_key+0x1f4/0x2f0
? lock_downgrade+0x3f0/0x3f0
? handle_mm_fault+0xad6/0x2150
? do_vfs_ioctl+0xfc/0x9d0
? ioctl_file_clone+0xe0/0xe0
? check_flags.part.50+0x6c/0x1e0
? check_flags.part.50+0x6c/0x1e0
? check_flags+0x26/0x30
? lock_is_held_type+0xc3/0xf0
? syscall_enter_from_user_mode+0x1b/0x60
? do_syscall_64+0x13/0x80
? rcu_read_lock_sched_held+0xa1/0xd0
? __kasan_check_read+0x11/0x20
? __fget_light+0xae/0x110
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
This occurs because of this check
if (RB_EMPTY_NODE(&upper->rb_node))
BUG_ON(!list_empty(&node->upper));
As we are dropping the backref node, if we discover that our upper node
in the edge we just cleaned up isn't linked into the cache that we are
now done with this node, thus the BUG_ON().
However this is an erroneous assumption, as we will look up all the
references for a node first, and then process the pending edges. All of
the 'upper' nodes in our pending edges won't be in the cache's rb_tree
yet, because they haven't been processed. We could very well have many
edges still left to cleanup on this node.
The fact is we simply do not need this check, we can just process all of
the edges only for this node, because below this check we do the
following
if (list_empty(&upper->lower)) {
list_add_tail(&upper->lower, &cache->leaves);
upper->lowest = 1;
}
If the upper node truly isn't used yet, then we add it to the
cache->leaves list to be cleaned up later. If it is still used then the
last child node that has it linked into its node will add it to the
leaves list and then it will be cleaned up.
Fix this problem by dropping this logic altogether. With this fix I no
longer see the panic when testing with error injection in the backref
code.
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While testing the error paths in relocation, I hit the following lockdep
splat:
======================================================
WARNING: possible circular locking dependency detected
5.10.0-rc3+ #206 Not tainted
------------------------------------------------------
btrfs-balance/1571 is trying to acquire lock:
ffff8cdbcc8f77d0 (&head_ref->mutex){+.+.}-{3:3}, at: btrfs_lookup_extent_info+0x156/0x3b0
but task is already holding lock:
ffff8cdbc54adbf8 (btrfs-tree-00){++++}-{3:3}, at: __btrfs_tree_lock+0x27/0x100
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (btrfs-tree-00){++++}-{3:3}:
down_write_nested+0x43/0x80
__btrfs_tree_lock+0x27/0x100
btrfs_search_slot+0x248/0x890
relocate_tree_blocks+0x490/0x650
relocate_block_group+0x1ba/0x5d0
kretprobe_trampoline+0x0/0x50
-> #1 (btrfs-csum-01){++++}-{3:3}:
down_read_nested+0x43/0x130
__btrfs_tree_read_lock+0x27/0x100
btrfs_read_lock_root_node+0x31/0x40
btrfs_search_slot+0x5ab/0x890
btrfs_del_csums+0x10b/0x3c0
__btrfs_free_extent+0x49d/0x8e0
__btrfs_run_delayed_refs+0x283/0x11f0
btrfs_run_delayed_refs+0x86/0x220
btrfs_start_dirty_block_groups+0x2ba/0x520
kretprobe_trampoline+0x0/0x50
-> #0 (&head_ref->mutex){+.+.}-{3:3}:
__lock_acquire+0x1167/0x2150
lock_acquire+0x116/0x3e0
__mutex_lock+0x7e/0x7b0
btrfs_lookup_extent_info+0x156/0x3b0
walk_down_proc+0x1c3/0x280
walk_down_tree+0x64/0xe0
btrfs_drop_subtree+0x182/0x260
do_relocation+0x52e/0x660
relocate_tree_blocks+0x2ae/0x650
relocate_block_group+0x1ba/0x5d0
kretprobe_trampoline+0x0/0x50
other info that might help us debug this:
Chain exists of:
&head_ref->mutex --> btrfs-csum-01 --> btrfs-tree-00
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(btrfs-tree-00);
lock(btrfs-csum-01);
lock(btrfs-tree-00);
lock(&head_ref->mutex);
*** DEADLOCK ***
5 locks held by btrfs-balance/1571:
#0: ffff8cdb89749ff8 (&fs_info->delete_unused_bgs_mutex){+.+.}-{3:3}, at: btrfs_balance+0x563/0xf40
#1: ffff8cdb89748838 (&fs_info->cleaner_mutex){+.+.}-{3:3}, at: btrfs_relocate_block_group+0x156/0x300
#2: ffff8cdbc2c16650 (sb_internal#2){.+.+}-{0:0}, at: start_transaction+0x413/0x5c0
#3: ffff8cdbc135f538 (btrfs-treloc-01){+.+.}-{3:3}, at: __btrfs_tree_lock+0x27/0x100
#4: ffff8cdbc54adbf8 (btrfs-tree-00){++++}-{3:3}, at: __btrfs_tree_lock+0x27/0x100
stack backtrace:
CPU: 1 PID: 1571 Comm: btrfs-balance Not tainted 5.10.0-rc3+ #206
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
Call Trace:
dump_stack+0x8b/0xb0
check_noncircular+0xcf/0xf0
? trace_call_bpf+0x139/0x260
__lock_acquire+0x1167/0x2150
lock_acquire+0x116/0x3e0
? btrfs_lookup_extent_info+0x156/0x3b0
__mutex_lock+0x7e/0x7b0
? btrfs_lookup_extent_info+0x156/0x3b0
? btrfs_lookup_extent_info+0x156/0x3b0
? release_extent_buffer+0x124/0x170
? _raw_spin_unlock+0x1f/0x30
? release_extent_buffer+0x124/0x170
btrfs_lookup_extent_info+0x156/0x3b0
walk_down_proc+0x1c3/0x280
walk_down_tree+0x64/0xe0
btrfs_drop_subtree+0x182/0x260
do_relocation+0x52e/0x660
relocate_tree_blocks+0x2ae/0x650
? add_tree_block+0x149/0x1b0
relocate_block_group+0x1ba/0x5d0
elfcorehdr_read+0x40/0x40
? elfcorehdr_read+0x40/0x40
? btrfs_balance+0x796/0xf40
? __kthread_parkme+0x66/0x90
? btrfs_balance+0xf40/0xf40
? balance_kthread+0x37/0x50
? kthread+0x137/0x150
? __kthread_bind_mask+0x60/0x60
? ret_from_fork+0x1f/0x30
As you can see this is bogus, we never take another tree's lock under
the csum lock. This happens because sometimes we have to read tree
blocks from disk without knowing which root they belong to during
relocation. We defaulted to an owner of 0, which translates to an fs
tree. This is fine as all fs trees have the same class, but obviously
isn't fine if the block belongs to a COW only tree.
Thankfully COW only trees only have their owners root as a reference to
them, and since we already look up the extent information during
relocation, go ahead and check and see if this block might belong to a
COW only tree, and if so save the owner in the tree_block struct. This
allows us to read_tree_block with the proper owner, which gets rid of
this lockdep splat.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This patch will extract the code to grab an extent buffer from a page
into a helper, grab_extent_buffer_from_page().
This reduces one indent level, and provides the work place for later
expansion for subapge support.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The original comment is from the initial merge, which has several
problems:
- No holes check any more
- No inline decision is made
Update the out-of-date comment with more correct one.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The refactoring involves the following modifications:
- iosize alignment
In fact we don't really need to manually do alignment at all.
All extent maps should already be aligned, thus basic ASSERT() check
would be enough.
- redundant variables
We have extra variable like blocksize/pg_offset/end.
They are all unnecessary.
@blocksize can be replaced by sectorsize size directly, and it's only
used to verify the em start/size is aligned.
@pg_offset can be easily calculated using @cur and page_offset(page).
@end is just assigned from @page_end and never modified, use
"start + PAGE_SIZE - 1" directly and remove @page_end.
- remove some BUG_ON()s
The BUG_ON()s are for extent map, which we have tree-checker to check
on-disk extent data item and runtime check.
ASSERT() should be enough.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The parameter offset is confusing, it's supposed to be the disk bytenr
of metadata/data. Rename it to disk_bytenr and update the comment.
Also rename each offset passed to submit_extent_page() as @disk_bytenr
so they're consistent.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The refactoring involves the following modifications:
- Return bool instead of int
- Parameter update for @cached of btrfs_dec_test_first_ordered_pending()
For btrfs_dec_test_first_ordered_pending(), @cached is only used to
return the finished ordered extent.
Rename it to @finished_ret.
- Comment updates
* Change one stale comment
Which still refers to btrfs_dec_test_ordered_pending(), but the
context is calling btrfs_dec_test_first_ordered_pending().
* Follow the common comment style for both functions
Add more detailed descriptions for parameters and the return value
* Move the reason why test_and_set_bit() is used into the call sites
- Change how the return value is calculated
The most anti-human part of the return value is:
if (...)
ret = 1;
...
return ret == 0;
This means, when we set ret to 1, the function returns 0.
Change the local variable name to @finished, and directly return the
value of it.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_dio_private::bytes is only assigned from bio::bi_iter::bi_size,
which is never larger than U32.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Following the rework in e076ab2a2c ("btrfs: shrink delalloc pages
instead of full inodes") the nr variable is no longer passed by
reference to start_delalloc_inodes hence it cannot change. Additionally
we are always guaranteed for it to be positive number hence it's
redundant to have it as a condition in the loop. Simply remove that
usage.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
It's currently u64 which gets instantly translated either to LONG_MAX
(if U64_MAX is passed) or cast to an unsigned long (which is in fact,
wrong because writeback_control::nr_to_write is a signed, long type).
Just convert the function's argument to be long time which obviates the
need to manually convert u64 value to a long. Adjust all call sites
which pass U64_MAX to pass LONG_MAX. Finally ensure that in
shrink_delalloc the u64 is converted to a long without overflowing,
resulting in a negative number.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
After commit 040ee6120c ("Btrfs: send, improve clone range") we do not
use anymore the data_offset field of struct backref_ctx, as after that we
do all the necessary checks for the data offset of file extent items at
clone_range(). Since there are no more users of data_offset from that
structure, remove it.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Instead of having three 'if' to handle non-NULL return value consolidate
this in one 'if (ret)'. That way the code is more obvious:
- Always drop delete_unused_bgs_mutex if ret is not NULL
- If ret is negative -> goto done
- If it's 1 -> reset ret to 0, release the path and finish the loop.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
I noticed that shared ref entries in ref-verify didn't have the proper
owner set, which caused me to think there was something seriously wrong.
However the problem is if we have a parent we simply weren't filling out
the owner part of the reference, even though we have it.
Fix this by making sure we set all the proper fields when we modify a
reference, this way we'll have the proper owner if a problem happens and
we don't waste time thinking we're updating the wrong level.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
I noticed that sometimes I would have the wrong level printed out with
ref-verify while testing some error injection related problems. This is
because we only get the level from the main extent item, but our
references could go off the current leaf into another, and at that point
we lose our level.
Fix this by keeping track of the last tree block level that we found,
the same way we keep track of our bytenr and num_bytes, in case we
happen to wander into another leaf while still processing the references
for a bytenr.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
I was attempting to reproduce a problem that Zygo hit, but my error
injection wasn't firing for a few of the common calls to
btrfs_should_cancel_balance. This is because the compiler decided to
inline it at these spots. Keep this from happening by explicitly
marking the function as noinline so that error injection will always
work.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The following patches are going to address error handling in relocation,
in order to test those patches I need to be able to inject errors in
btrfs_search_slot and btrfs_cow_block, as we call both of these pretty
often in different cases during relocation.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
It's no longer used. While at it also remove new_dirid in create_subvol
as it's used in a single place and open code it. No functional changes.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Adjust the way free_objectid is being initialized, it now stores
BTRFS_FIRST_FREE_OBJECTID rather than the, somewhat arbitrary,
BTRFS_FIRST_FREE_OBJECTID - 1. This change also has the added benefit
that now it becomes unnecessary to explicitly initialize free_objectid
for a newly create fs root.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This reflects the true purpose of the member as it's being used solely
in context where a new objectid is being allocated. Future changes will
also change the way it's being used to closely follow this semantics.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This better reflects the semantics of the function i.e no search is
performed whatsoever.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This function is used to initialize the in-memory
btrfs_root::highest_objectid member, which is used to get an available
objectid. Rename it to better reflect its semantics.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
First replace all inode instances with a pointer to btrfs_inode. This
removes multiple invocations of the BTRFS_I macro, subsequently remove
2 local variables as they are called only once and simply refer to
them directly.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Return value in __load_free_space_cache is not properly set after
(unlikely) memory allocation failures and 0 is returned instead.
This is not a problem for the caller load_free_space_cache because only
value 1 is considered as 'cache loaded' but for clarity it's better
to set the errors accordingly.
Fixes: a67509c300 ("Btrfs: add a io_ctl struct and helpers for dealing with the space cache")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While doing error injection I would sometimes get a corrupt file system.
This is because I was injecting errors at btrfs_search_slot, but would
only do it one time per stack. This uncovered a problem in
commit_fs_roots, where if we get an error we would just break. However
we're in a nested loop, the first loop being a loop to find all the
dirty fs roots, and then subsequent root updates would succeed clearing
the error value.
This isn't likely to happen in real scenarios, however we could
potentially get a random ENOMEM once and then not again, and we'd end up
with a corrupted file system. Fix this by moving the error checking
around a bit to the main loop, as this is the only place where something
will fail, and return the error as soon as it occurs.
With this patch my reproducer no longer corrupts the file system.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-----BEGIN PGP SIGNATURE-----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=5FIb
-----END PGP SIGNATURE-----
Merge tag '5.11-rc6-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Three small smb3 fixes for stable"
* tag '5.11-rc6-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: report error instead of invalid when revalidating a dentry fails
smb3: fix crediting for compounding when only one request in flight
smb3: Fix out-of-bounds bug in SMB2_negotiate()
-----BEGIN PGP SIGNATURE-----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=sGoQ
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.11-2021-02-05' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Two small fixes that should go into 5.11:
- task_work resource drop fix (Pavel)
- identity COW fix (Xiaoguang)"
* tag 'io_uring-5.11-2021-02-05' of git://git.kernel.dk/linux-block:
io_uring: drop mm/files between task_work_submit
io_uring: don't modify identity's files uncess identity is cowed
Assuming
- //HOST/a is mounted on /mnt
- //HOST/b is mounted on /mnt/b
On a slow connection, running 'df' and killing it while it's
processing /mnt/b can make cifs_get_inode_info() returns -ERESTARTSYS.
This triggers the following chain of events:
=> the dentry revalidation fail
=> dentry is put and released
=> superblock associated with the dentry is put
=> /mnt/b is unmounted
This patch makes cifs_d_revalidate() return the error instead of 0
(invalid) when cifs_revalidate_dentry() fails, except for ENOENT (file
deleted) and ESTALE (file recreated).
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Suggested-by: Shyam Prasad N <nspmangalore@gmail.com>
Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
CC: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
If a new hugetlb page is allocated during fallocate it will not be
marked as active (set_page_huge_active) which will result in a later
isolate_huge_page failure when the page migration code would like to
move that page. Such a failure would be unexpected and wrong.
Only export set_page_huge_active, just leave clear_page_huge_active as
static. Because there are no external users.
Link: https://lkml.kernel.org/r/20210115124942.46403-3-songmuchun@bytedance.com
Fixes: 70c3547e36 (hugetlbfs: add hugetlbfs_fallocate())
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently we try to guess if a compound request is going to
succeed waiting for credits or not based on the number of
requests in flight. This approach doesn't work correctly
all the time because there may be only one request in
flight which is going to bring multiple credits satisfying
the compound request.
Change the behavior to fail a request only if there are no requests
in flight at all and proceed waiting for credits otherwise.
Cc: <stable@vger.kernel.org> # 5.1+
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Tom Talpey <tom@talpey.com>
Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Since SQPOLL task can be shared and so task_work entries can be a mix of
them, we need to drop mm and files before trying to issue next request.
Cc: stable@vger.kernel.org # 5.10+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCYBuyTQAKCRDh3BK/laaZ
PBBhAPwLy3ksQLhY7in4I8aKrSyWRpaCSAeLQUitxnX3eQiQnAD/S1EEIapwradV
y4ou1PBRsGnhwNgArXODVCcTgqDJqw8=
=GjU4
-----END PGP SIGNATURE-----
Merge tag 'ovl-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
- Fix capability conversion and minor overlayfs bugs that are related
to the unprivileged overlay mounts introduced in this cycle.
- Fix two recent (v5.10) and one old (v4.10) bug.
- Clean up security xattr copy-up (related to a SELinux regression).
* tag 'ovl-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: implement volatile-specific fsync error behaviour
ovl: skip getxattr of security labels
ovl: fix dentry leak in ovl_get_redirect
ovl: avoid deadlock on directory ioctl
cap: fix conversions on getxattr
ovl: perform vfs_getxattr() with mounter creds
ovl: add warning on user_ns mismatch
trees.
Current release - regressions:
- ip_tunnel: fix mtu calculation
- mlx5: fix function calculation for page trees
Previous releases - regressions:
- vsock: fix the race conditions in multi-transport support
- neighbour: prevent a dead entry from updating gc_list
- dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
Previous releases - always broken:
- bpf, cgroup: two copy_{from,to}_user() warn_on_once splats for BPF
cgroup getsockopt infra when user space is trying
to race against optlen, from Loris Reiff.
- bpf: add missing fput() in BPF inode storage map update helper
- udp: ipv4: manipulate network header of NATed UDP GRO fraglist
- mac80211: fix station rate table updates on assoc
- r8169: work around RTL8125 UDP HW bug
- igc: report speed and duplex as unknown when device is runtime
suspended
- rxrpc: fix deadlock around release of dst cached on udp tunnel
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=ZByM
-----END PGP SIGNATURE-----
Merge tag 'net-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.11-rc7, including fixes from bpf and mac80211
trees.
Current release - regressions:
- ip_tunnel: fix mtu calculation
- mlx5: fix function calculation for page trees
Previous releases - regressions:
- vsock: fix the race conditions in multi-transport support
- neighbour: prevent a dead entry from updating gc_list
- dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
Previous releases - always broken:
- bpf, cgroup: two copy_{from,to}_user() warn_on_once splats for BPF
cgroup getsockopt infra when user space is trying to race against
optlen, from Loris Reiff.
- bpf: add missing fput() in BPF inode storage map update helper
- udp: ipv4: manipulate network header of NATed UDP GRO fraglist
- mac80211: fix station rate table updates on assoc
- r8169: work around RTL8125 UDP HW bug
- igc: report speed and duplex as unknown when device is runtime
suspended
- rxrpc: fix deadlock around release of dst cached on udp tunnel"
* tag 'net-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (36 commits)
net: hsr: align sup_multicast_addr in struct hsr_priv to u16 boundary
net: ipa: fix two format specifier errors
net: ipa: use the right accessor in ipa_endpoint_status_skip()
net: ipa: be explicit about endianness
net: ipa: add a missing __iomem attribute
net: ipa: pass correct dma_handle to dma_free_coherent()
r8169: fix WoL on shutdown if CONFIG_DEBUG_SHIRQ is set
net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGS
net: mvpp2: TCAM entry enable should be written after SRAM data
net: lapb: Copy the skb before sending a packet
net/mlx5e: Release skb in case of failure in tc update skb
net/mlx5e: Update max_opened_tc also when channels are closed
net/mlx5: Fix leak upon failure of rule creation
net/mlx5: Fix function calculation for page trees
docs: networking: swap words in icmp_errors_use_inbound_ifaddr doc
udp: ipv4: manipulate network header of NATed UDP GRO fraglist
net: ip_tunnel: fix mtu calculation
vsock: fix the race conditions in multi-transport support
net: sched: replaced invalid qdisc tree flush helper in qdisc_replace
ibmvnic: device remove has higher precedence over reset
...
While addressing some warnings generated by -Warray-bounds, I found this
bug that was introduced back in 2017:
CC [M] fs/cifs/smb2pdu.o
fs/cifs/smb2pdu.c: In function ‘SMB2_negotiate’:
fs/cifs/smb2pdu.c:822:16: warning: array subscript 1 is above array bounds
of ‘__le16[1]’ {aka ‘short unsigned int[1]’} [-Warray-bounds]
822 | req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
| ~~~~~~~~~~~~~^~~
fs/cifs/smb2pdu.c:823:16: warning: array subscript 2 is above array bounds
of ‘__le16[1]’ {aka ‘short unsigned int[1]’} [-Warray-bounds]
823 | req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
| ~~~~~~~~~~~~~^~~
fs/cifs/smb2pdu.c:824:16: warning: array subscript 3 is above array bounds
of ‘__le16[1]’ {aka ‘short unsigned int[1]’} [-Warray-bounds]
824 | req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
| ~~~~~~~~~~~~~^~~
fs/cifs/smb2pdu.c:816:16: warning: array subscript 1 is above array bounds
of ‘__le16[1]’ {aka ‘short unsigned int[1]’} [-Warray-bounds]
816 | req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
| ~~~~~~~~~~~~~^~~
At the time, the size of array _Dialects_ was changed from 1 to 3 in struct
validate_negotiate_info_req, and then in 2019 it was changed from 3 to 4,
but those changes were never made in struct smb2_negotiate_req, which has
led to a 3 and a half years old out-of-bounds bug in function
SMB2_negotiate() (fs/cifs/smb2pdu.c).
Fix this by increasing the size of array _Dialects_ in struct
smb2_negotiate_req to 4.
Fixes: 9764c02fcb ("SMB3: Add support for multidialect negotiate (SMB2.1 and later)")
Fixes: d5c7076b77 ("smb3: add smb3.1.1 to default dialect list")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Highlights include:
Bugfixes:
- SUNRPC: Handle 0 length opaque XDR object data properly
- Fix a layout segment leak in pnfs_layout_process()
- pNFS/NFSv4: Update the layout barrier when we schedule a layoutreturn
- pNFS/NFSv4: Improve rejection of out-of-order layouts
- pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
-----BEGIN PGP SIGNATURE-----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=gLzv
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.11-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client fixes from Trond Myklebust:
- SUNRPC: Handle 0 length opaque XDR object data properly
- Fix a layout segment leak in pnfs_layout_process()
- pNFS/NFSv4: Update the layout barrier when we schedule a layoutreturn
- pNFS/NFSv4: Improve rejection of out-of-order layouts
- pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
* tag 'nfs-for-5.11-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
SUNRPC: Handle 0 length opaque XDR object data properly
SUNRPC: Move simple_get_bytes and simple_get_netobj into private header
pNFS/NFSv4: Improve rejection of out-of-order layouts
pNFS/NFSv4: Update the layout barrier when we schedule a layoutreturn
pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()
-----BEGIN PGP SIGNATURE-----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=4/ty
-----END PGP SIGNATURE-----
Merge tag '5.11-rc5-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Four cifs patches found in additional testing of the conversion to the
new mount API: three small option processing ones, and one fixing domain
based DFS referrals"
* tag '5.11-rc5-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix dfs domain referrals
cifs: returning mount parm processing errors correctly
cifs: fix mounts to subdirectories of target
cifs: ignore auto and noauto options if given
AF_RXRPC sockets use UDP ports in encap mode. This causes socket and dst
from an incoming packet to get stolen and attached to the UDP socket from
whence it is leaked when that socket is closed.
When a network namespace is removed, the wait for dst records to be cleaned
up happens before the cleanup of the rxrpc and UDP socket, meaning that the
wait never finishes.
Fix this by moving the rxrpc (and, by dependence, the afs) private
per-network namespace registrations to the device group rather than subsys
group. This allows cached rxrpc local endpoints to be cleared and their
UDP sockets closed before we try waiting for the dst records.
The symptom is that lines looking like the following:
unregister_netdevice: waiting for lo to become free
get emitted at regular intervals after running something like the
referenced syzbot test.
Thanks to Vadim for tracking this down and work out the fix.
Reported-by: syzbot+df400f2f24a1677cd7e0@syzkaller.appspotmail.com
Reported-by: Vadim Fedorenko <vfedorenko@novek.ru>
Fixes: 5271953cad ("rxrpc: Use the UDP encap_rcv hook")
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Vadim Fedorenko <vfedorenko@novek.ru>
Link: https://lore.kernel.org/r/161196443016.3868642.5577440140646403533.stgit@warthog.procyon.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=/yHv
-----END PGP SIGNATURE-----
Merge tag 'for-5.11-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few more fixes for a late rc:
- fix lockdep complaint on 32bit arches and also remove an unsafe
memory use due to device vs filesystem lifetime
- two fixes for free space tree:
* race during log replay and cache rebuild, now more likely to
happen due to changes in this dev cycle
* possible free space tree corruption with online conversion
during initial tree population"
* tag 'for-5.11-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix log replay failure due to race with space cache rebuild
btrfs: fix lockdep warning due to seqcount_mutex on 32bit arch
btrfs: fix possible free space tree corruption with online conversion
-----BEGIN PGP SIGNATURE-----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=hb7W
-----END PGP SIGNATURE-----
Merge tag 'block-5.11-2021-01-29' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"All over the place fixes for this release:
- blk-cgroup iteration teardown resched fix (Baolin)
- NVMe pull request from Christoph:
- add another Write Zeroes quirk (Chaitanya Kulkarni)
- handle a no path available corner case (Daniel Wagner)
- use the proper RCU aware list_add helper (Chao Leng)
- bcache regression fix (Coly)
- bdev->bd_size_lock IRQ fix. This will be fixed in drivers for 5.12,
but for now, we'll make it IRQ safe (Damien)
- null_blk zoned init fix (Damien)
- add_partition() error handling fix (Dinghao)
- s390 dasd kobject fix (Jan)
- nbd fix for freezing queue while adding connections (Josef)
- tag queueing regression fix (Ming)
- revert of a patch that inadvertently meant that we regressed write
performance on raid (Maxim)"
* tag 'block-5.11-2021-01-29' of git://git.kernel.dk/linux-block:
null_blk: cleanup zoned mode initialization
nvme-core: use list_add_tail_rcu instead of list_add_tail for nvme_init_ns_head
nvme-multipath: Early exit if no path is available
nvme-pci: add the DISABLE_WRITE_ZEROES quirk for a SPCC device
bcache: only check feature sets when sb->version >= BCACHE_SB_VERSION_CDEV_WITH_FEATURES
block: fix bd_size_lock use
blk-cgroup: Use cond_resched() when destroy blkgs
Revert "block: simplify set_init_blocksize" to regain lost performance
nbd: freeze the queue while we're adding connections
s390/dasd: Fix inconsistent kobject removal
block: Fix an error handling in add_partition
blk-mq: test QUEUE_FLAG_HCTX_ACTIVE for sbitmap_shared in hctx_may_queue
-----BEGIN PGP SIGNATURE-----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=oCb5
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.11-2021-01-29' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"We got the cancelation story sorted now, so for all intents and
purposes, this should be it for 5.11 outside of any potential little
fixes that may come in. This contains:
- task_work task state fixes (Hao, Pavel)
- Cancelation fixes (me, Pavel)
- Fix for an inflight req patch in this release (Pavel)
- Fix for a lock deadlock issue (Pavel)"
* tag 'io_uring-5.11-2021-01-29' of git://git.kernel.dk/linux-block:
io_uring: reinforce cancel on flush during exit
io_uring: fix sqo ownership false positive warning
io_uring: fix list corruption for splice file_get
io_uring: fix flush cqring overflow list while TASK_INTERRUPTIBLE
io_uring: fix wqe->lock/completion_lock deadlock
io_uring: fix cancellation taking mutex while TASK_UNINTERRUPTIBLE
io_uring: fix __io_uring_files_cancel() with TASK_UNINTERRUPTIBLE
io_uring: only call io_cqring_ev_posted() if events were posted
io_uring: if we see flush on exit, cancel related tasks
The new mount API requires additional changes to how DFS
is handled. Additional testing of DFS uncovered problems
with domain based DFS referrals (a follow on patch addresses
DFS links) which this patch addresses.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
of UID translations to occur, in some configurations, when setting v3
namespaced file capabilities.
-----BEGIN PGP SIGNATURE-----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=G4uE
-----END PGP SIGNATURE-----
Merge tag 'ecryptfs-5.11-rc6-setxattr-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs
Pull ecryptfs fix from Tyler Hicks:
"Fix a regression that resulted in two rounds of UID translations when
setting v3 namespaced file capabilities in some configurations"
* tag 'ecryptfs-5.11-rc6-setxattr-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
ecryptfs: fix uid translation for setxattr on security.capability
What 84965ff8a8 ("io_uring: if we see flush on exit, cancel related tasks")
really wants is to cancel all relevant REQ_F_INFLIGHT requests reliably.
That can be achieved by io_uring_cancel_files(), but we'll miss it
calling io_uring_cancel_task_requests(files=NULL) from io_uring_flush(),
because it will go through __io_uring_cancel_task_requests().
Just always call io_uring_cancel_files() during cancel, it's good enough
for now.
Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
During additional testing of the updated cifs.ko with the
new mount API support, we found a few additional cases where
we were logging errors, but not returning them to the user.
For example:
a) invalid security mechanisms
b) invalid cache options
c) unsupported rdma
d) invalid smb dialect requested
Fixes: 24e0a1eff9 ("cifs: switch to new mount api")
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
WARNING: CPU: 0 PID: 21359 at fs/io_uring.c:9042
io_uring_cancel_task_requests+0xe55/0x10c0 fs/io_uring.c:9042
Call Trace:
io_uring_flush+0x47b/0x6e0 fs/io_uring.c:9227
filp_close+0xb4/0x170 fs/open.c:1295
close_files fs/file.c:403 [inline]
put_files_struct fs/file.c:418 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:415
exit_files+0x7e/0xa0 fs/file.c:435
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x427/0x20f0 kernel/signal.c:2773
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Now io_uring_cancel_task_requests() can be called not through file
notes but directly, remove a WARN_ONCE() there that give us false
positives. That check is not very important and we catch it in other
places.
Fixes: 84965ff8a8 ("io_uring: if we see flush on exit, cancel related tasks")
Cc: stable@vger.kernel.org # 5.9+
Reported-by: syzbot+3e3d9bd0c6ce9efbc3ef@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The "prefixpath" mount option needs to be ignored
which was missed in the recent conversion to the
new mount API (prefixpath would be set by the mount
helper if mounting a subdirectory of the root of a
share e.g. //server/share/subdir)
Fixes: 24e0a1eff9 ("cifs: switch to new mount api")
Suggested-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
In 24e0a1eff9, the noauto and auto options were missed when migrating
to the new mount API. As a result, users with noauto in their fstab
mount options are now unable to mount cifs filesystems, as they'll
receive an "Unknown parameter" error.
This restores the old behaviour of ignoring noauto and auto if they're
given.
Fixes: 24e0a1eff9 ("cifs: switch to new mount api")
Signed-off-by: Adam Harvey <adam@adamharvey.name>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Overlayfs's volatile option allows the user to bypass all forced sync calls
to the upperdir filesystem. This comes at the cost of safety. We can never
ensure that the user's data is intact, but we can make a best effort to
expose whether or not the data is likely to be in a bad state.
The best way to handle this in the time being is that if an overlayfs's
upperdir experiences an error after a volatile mount occurs, that error
will be returned on fsync, fdatasync, sync, and syncfs. This is
contradictory to the traditional behaviour of VFS which fails the call
once, and only raises an error if a subsequent fsync error has occurred,
and been raised by the filesystem.
One awkward aspect of the patch is that we have to manually set the
superblock's errseq_t after the sync_fs callback as opposed to just
returning an error from syncfs. This is because the call chain looks
something like this:
sys_syncfs ->
sync_filesystem ->
__sync_filesystem ->
/* The return value is ignored here
sb->s_op->sync_fs(sb)
_sync_blockdev
/* Where the VFS fetches the error to raise to userspace */
errseq_check_and_advance
Because of this we call errseq_set every time the sync_fs callback occurs.
Due to the nature of this seen / unseen dichotomy, if the upperdir is an
inconsistent state at the initial mount time, overlayfs will refuse to
mount, as overlayfs cannot get a snapshot of the upperdir's errseq that
will increment on error until the user calls syncfs.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Fixes: c86243b090 ("ovl: provide a mount option "volatile"")
Cc: stable@vger.kernel.org
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
When inode has no listxattr op of its own (e.g. squashfs) vfs_listxattr
calls the LSM inode_listsecurity hooks to list the xattrs that LSMs will
intercept in inode_getxattr hooks.
When selinux LSM is installed but not initialized, it will list the
security.selinux xattr in inode_listsecurity, but will not intercept it
in inode_getxattr. This results in -ENODATA for a getxattr call for an
xattr returned by listxattr.
This situation was manifested as overlayfs failure to copy up lower
files from squashfs when selinux is built-in but not initialized,
because ovl_copy_xattr() iterates the lower inode xattrs by
vfs_listxattr() and vfs_getxattr().
ovl_copy_xattr() skips copy up of security labels that are indentified by
inode_copy_up_xattr LSM hooks, but it does that after vfs_getxattr().
Since we are not going to copy them, skip vfs_getxattr() of the security
labels.
Reported-by: Michael Labriola <michael.d.labriola@gmail.com>
Tested-by: Michael Labriola <michael.d.labriola@gmail.com>
Link: https://lore.kernel.org/linux-unionfs/2nv9d47zt7.fsf@aldarion.sourceruckus.org/
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
The function ovl_dir_real_file() currently uses the inode lock to serialize
writes to the od->upperfile field.
However, this function will get called by ovl_ioctl_set_flags(), which
utilizes the inode lock too. In this case ovl_dir_real_file() will try to
claim a lock that is owned by a function in its call stack, which won't get
released before ovl_dir_real_file() returns.
Fix by replacing the open coded compare and exchange by an explicit atomic
op.
Fixes: 61536bed21 ("ovl: support [S|G]ETFLAGS and FS[S|G]ETXATTR ioctls for directories")
Cc: stable@vger.kernel.org # v5.10
Reported-by: Icenowy Zheng <icenowy@aosc.io>
Tested-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
The vfs_getxattr() in ovl_xattr_set() is used to check whether an xattr
exist on a lower layer file that is to be removed. If the xattr does not
exist, then no need to copy up the file.
This call of vfs_getxattr() wasn't wrapped in credential override, and this
is probably okay. But for consitency wrap this instance as well.
Reported-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Currently there's no way to create an overlay filesystem outside of the
current user namespace. Make sure that if this assumption changes it
doesn't go unnoticed.
Reported-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
The cited commit introduced a serious regression with SATA write speed,
as found by bisecting. This patch reverts this commit, which restores
write speed back to the values observed before this commit.
The performance tests were done on a Helios4 NAS (2nd batch) with 4 HDDs
(WD8003FFBX) using dd (bs=1M count=2000). "Direct" is a test with a
single HDD, the rest are different RAID levels built over the first
partitions of 4 HDDs. Test results are in MB/s, R is read, W is write.
| Direct | RAID0 | RAID10 f2 | RAID10 n2 | RAID6
----------------+--------+-------+-----------+-----------+--------
9011495c94 | R:256 | R:313 | R:276 | R:313 | R:323
(before faulty) | W:254 | W:253 | W:195 | W:204 | W:117
----------------+--------+-------+-----------+-----------+--------
5ff9f19231 | R:257 | R:398 | R:312 | R:344 | R:391
(faulty commit) | W:154 | W:122 | W:67.7 | W:66.6 | W:67.2
----------------+--------+-------+-----------+-----------+--------
5.10.10 | R:256 | R:401 | R:312 | R:356 | R:375
unpatched | W:149 | W:123 | W:64 | W:64.1 | W:61.5
----------------+--------+-------+-----------+-----------+--------
5.10.10 | R:255 | R:396 | R:312 | R:340 | R:393
patched | W:247 | W:274 | W:220 | W:225 | W:121
Applying this patch doesn't hurt read performance, while improves the
write speed by 1.5x - 3.5x (more impact on RAID tests). The write speed
is restored back to the state before the faulty commit, and even a bit
higher in RAID tests (which aren't HDD-bound on this device) - that is
likely related to other optimizations done between the faulty commit and
5.10.10 which also improved the read speed.
Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Fixes: 5ff9f19231 ("block: simplify set_init_blocksize")
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If the tctx inflight number haven't changed because of cancellation,
__io_uring_task_cancel() will continue leaving the task in
TASK_UNINTERRUPTIBLE state, that's not expected by
__io_uring_files_cancel(). Ensure we always call finish_wait() before
retrying.
Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Prior to commit 7c03e2cda4 ("vfs: move cap_convert_nscap() call into
vfs_setxattr()") the translation of nscap->rootid did not take stacked
filesystems (overlayfs and ecryptfs) into account.
That patch fixed the overlay case, but made the ecryptfs case worse.
Restore old the behavior for ecryptfs that existed before the overlayfs
fix. This does not fix ecryptfs's handling of complex user namespace
setups, but it does make sure existing setups don't regress.
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Tyler Hicks <code@tyhicks.com>
Fixes: 7c03e2cda4 ("vfs: move cap_convert_nscap() call into vfs_setxattr()")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
After commit 36e2c7421f ("fs: don't allow splice read/write
without explicit ops") sendfile() could no longer send data
from a real file to a pipe, breaking for example certain cgit
setups (e.g. when running behind fcgiwrap), because in this
case cgit will try to do exactly this: sendfile() to a pipe.
Fix this by using iter_file_splice_write for the splice_write
method of pipes, as suggested by Christoph.
Cc: stable@vger.kernel.org
Fixes: 36e2c7421f ("fs: don't allow splice read/write without explicit ops")
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After a sudden power failure we may end up with a space cache on disk that
is not valid and needs to be rebuilt from scratch.
If that happens, during log replay when we attempt to pin an extent buffer
from a log tree, at btrfs_pin_extent_for_log_replay(), we do not wait for
the space cache to be rebuilt through the call to:
btrfs_cache_block_group(cache, 1);
That is because that only waits for the task (work queue job) that loads
the space cache to change the cache state from BTRFS_CACHE_FAST to any
other value. That is ok when the space cache on disk exists and is valid,
but when the cache is not valid and needs to be rebuilt, it ends up
returning as soon as the cache state changes to BTRFS_CACHE_STARTED (done
at caching_thread()).
So this means that we can end up trying to unpin a range which is not yet
marked as free in the block group. This results in the call to
btrfs_remove_free_space() to return -EINVAL to
btrfs_pin_extent_for_log_replay(), which in turn makes the log replay fail
as well as mounting the filesystem. More specifically the -EINVAL comes
from free_space_cache.c:remove_from_bitmap(), because the requested range
is not marked as free space (ones in the bitmap), we have the following
condition triggered:
static noinline int remove_from_bitmap(struct btrfs_free_space_ctl *ctl,
(...)
if (ret < 0 || search_start != *offset)
return -EINVAL;
(...)
It's the "search_start != *offset" that results in the condition being
evaluated to true.
When this happens we got the following in dmesg/syslog:
[72383.415114] BTRFS: device fsid 32b95b69-0ea9-496a-9f02-3f5a56dc9322 devid 1 transid 1432 /dev/sdb scanned by mount (3816007)
[72383.417837] BTRFS info (device sdb): disk space caching is enabled
[72383.418536] BTRFS info (device sdb): has skinny extents
[72383.423846] BTRFS info (device sdb): start tree-log replay
[72383.426416] BTRFS warning (device sdb): block group 30408704 has wrong amount of free space
[72383.427686] BTRFS warning (device sdb): failed to load free space cache for block group 30408704, rebuilding it now
[72383.454291] BTRFS: error (device sdb) in btrfs_recover_log_trees:6203: errno=-22 unknown (Failed to pin buffers while recovering log root tree.)
[72383.456725] BTRFS: error (device sdb) in btrfs_replay_log:2253: errno=-22 unknown (Failed to recover log tree)
[72383.460241] BTRFS error (device sdb): open_ctree failed
We also mark the range for the extent buffer in the excluded extents io
tree. That is fine when the space cache is valid on disk and we can load
it, in which case it causes no problems.
However, for the case where we need to rebuild the space cache, because it
is either invalid or it is missing, having the extent buffer range marked
in the excluded extents io tree leads to a -EINVAL failure from the call
to btrfs_remove_free_space(), resulting in the log replay and mount to
fail. This is because by having the range marked in the excluded extents
io tree, the caching thread ends up never adding the range of the extent
buffer as free space in the block group since the calls to
add_new_free_space(), called from load_extent_tree_free(), filter out any
ranges that are marked as excluded extents.
So fix this by making sure that during log replay we wait for the caching
task to finish completely when we need to rebuild a space cache, and also
drop the need to mark the extent buffer range in the excluded extents io
tree, as well as clearing ranges from that tree at
btrfs_finish_extent_commit().
This started to happen with some frequency on large filesystems having
block groups with a lot of fragmentation since the recent commit
e747853cae ("btrfs: load free space cache asynchronously"), but in
fact the issue has been there for years, it was just much less likely
to happen.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This effectively reverts commit d5c8238849 ("btrfs: convert
data_seqcount to seqcount_mutex_t").
While running fstests on 32 bits test box, many tests failed because of
warnings in dmesg. One of those warnings (btrfs/003):
[66.441317] WARNING: CPU: 6 PID: 9251 at include/linux/seqlock.h:279 btrfs_remove_chunk+0x58b/0x7b0 [btrfs]
[66.441446] CPU: 6 PID: 9251 Comm: btrfs Tainted: G O 5.11.0-rc4-custom+ #5
[66.441449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.14.0-1 04/01/2014
[66.441451] EIP: btrfs_remove_chunk+0x58b/0x7b0 [btrfs]
[66.441472] EAX: 00000000 EBX: 00000001 ECX: c576070c EDX: c6b15803
[66.441475] ESI: 10000000 EDI: 00000000 EBP: c56fbcfc ESP: c56fbc70
[66.441477] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[66.441481] CR0: 80050033 CR2: 05c8da20 CR3: 04b20000 CR4: 00350ed0
[66.441485] Call Trace:
[66.441510] btrfs_relocate_chunk+0xb1/0x100 [btrfs]
[66.441529] ? btrfs_lookup_block_group+0x17/0x20 [btrfs]
[66.441562] btrfs_balance+0x8ed/0x13b0 [btrfs]
[66.441586] ? btrfs_ioctl_balance+0x333/0x3c0 [btrfs]
[66.441619] ? __this_cpu_preempt_check+0xf/0x11
[66.441643] btrfs_ioctl_balance+0x333/0x3c0 [btrfs]
[66.441664] ? btrfs_ioctl_get_supported_features+0x30/0x30 [btrfs]
[66.441683] btrfs_ioctl+0x414/0x2ae0 [btrfs]
[66.441700] ? __lock_acquire+0x35f/0x2650
[66.441717] ? lockdep_hardirqs_on+0x87/0x120
[66.441720] ? lockdep_hardirqs_on_prepare+0xd0/0x1e0
[66.441724] ? call_rcu+0x2d3/0x530
[66.441731] ? __might_fault+0x41/0x90
[66.441736] ? kvm_sched_clock_read+0x15/0x50
[66.441740] ? sched_clock+0x8/0x10
[66.441745] ? sched_clock_cpu+0x13/0x180
[66.441750] ? btrfs_ioctl_get_supported_features+0x30/0x30 [btrfs]
[66.441750] ? btrfs_ioctl_get_supported_features+0x30/0x30 [btrfs]
[66.441768] __ia32_sys_ioctl+0x165/0x8a0
[66.441773] ? __this_cpu_preempt_check+0xf/0x11
[66.441785] ? __might_fault+0x89/0x90
[66.441791] __do_fast_syscall_32+0x54/0x80
[66.441796] do_fast_syscall_32+0x32/0x70
[66.441801] do_SYSENTER_32+0x15/0x20
[66.441805] entry_SYSENTER_32+0x9f/0xf2
[66.441808] EIP: 0xab7b5549
[66.441814] EAX: ffffffda EBX: 00000003 ECX: c4009420 EDX: bfa91f5c
[66.441816] ESI: 00000003 EDI: 00000001 EBP: 00000000 ESP: bfa91e98
[66.441818] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000292
[66.441833] irq event stamp: 42579
[66.441835] hardirqs last enabled at (42585): [<c60eb065>] console_unlock+0x495/0x590
[66.441838] hardirqs last disabled at (42590): [<c60eafd5>] console_unlock+0x405/0x590
[66.441840] softirqs last enabled at (41698): [<c601b76c>] call_on_stack+0x1c/0x60
[66.441843] softirqs last disabled at (41681): [<c601b76c>] call_on_stack+0x1c/0x60
========================================================================
btrfs_remove_chunk+0x58b/0x7b0:
__seqprop_mutex_assert at linux/./include/linux/seqlock.h:279
(inlined by) btrfs_device_set_bytes_used at linux/fs/btrfs/volumes.h:212
(inlined by) btrfs_remove_chunk at linux/fs/btrfs/volumes.c:2994
========================================================================
The warning is produced by lockdep_assert_held() in
__seqprop_mutex_assert() if CONFIG_LOCKDEP is enabled.
And "olumes.c:2994 is btrfs_device_set_bytes_used() with mutex lock
fs_info->chunk_mutex held already.
After adding some debug prints, the cause was found that many
__alloc_device() are called with NULL @fs_info (during scanning ioctl).
Inside the function, btrfs_device_data_ordered_init() is expanded to
seqcount_mutex_init(). In this scenario, its second
parameter info->chunk_mutex is &NULL->chunk_mutex which equals
to offsetof(struct btrfs_fs_info, chunk_mutex) unexpectedly. Thus,
seqcount_mutex_init() is called in wrong way. And later
btrfs_device_get/set helpers trigger lockdep warnings.
The device and filesystem object lifetimes are different and we'd have
to synchronize initialization of the btrfs_device::data_seqcount with
the fs_info, possibly using some additional synchronization. It would
still not prevent concurrent access to the seqcount lock when it's used
for read and initialization.
Commit d5c8238849 ("btrfs: convert data_seqcount to seqcount_mutex_t")
does not mention a particular problem being fixed so revert should not
cause any harm and we'll get the lockdep warning fixed.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=210139
Reported-by: Erhard F <erhard_f@mailbox.org>
Fixes: d5c8238849 ("btrfs: convert data_seqcount to seqcount_mutex_t")
CC: stable@vger.kernel.org # 5.10
CC: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Su Yue <l@damenly.su>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While running btrfs/011 in a loop I would often ASSERT() while trying to
add a new free space entry that already existed, or get an EEXIST while
adding a new block to the extent tree, which is another indication of
double allocation.
This occurs because when we do the free space tree population, we create
the new root and then populate the tree and commit the transaction.
The problem is when you create a new root, the root node and commit root
node are the same. During this initial transaction commit we will run
all of the delayed refs that were paused during the free space tree
generation, and thus begin to cache block groups. While caching block
groups the caching thread will be reading from the main root for the
free space tree, so as we make allocations we'll be changing the free
space tree, which can cause us to add the same range twice which results
in either the ASSERT(ret != -EEXIST); in __btrfs_add_free_space, or in a
variety of different errors when running delayed refs because of a
double allocation.
Fix this by marking the fs_info as unsafe to load the free space tree,
and fall back on the old slow method. We could be smarter than this,
for example caching the block group while we're populating the free
space tree, but since this is a serious problem I've opted for the
simplest solution.
CC: stable@vger.kernel.org # 4.9+
Fixes: a5ed918285 ("Btrfs: implement the free space B-tree")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
If a layoutget ends up being reordered w.r.t. a layoutreturn, e.g. due
to a layoutget-on-open not knowing a priori which file to lock, then we
must assume the layout is no longer being considered valid state by the
server.
Incrementally improve our ability to reject such states by using the
cached old stateid in conjunction with the plh_barrier to try to
identify them.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When we're scheduling a layoutreturn, we need to ignore any further
incoming layouts with sequence ids that are going to be affected by the
layout return.
Fixes: 44ea8dfce0 ("NFS/pnfs: Reference the layout cred in pnfs_prepare_layoutreturn()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If the server returns a new stateid that does not match the one in our
cache, then try to return the one we hold instead of just invalidating
it on the client side. This ensures that both client and server will
agree that the stateid is invalid.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If the server returns a new stateid that does not match the one in our
cache, then pnfs_layout_process() will leak the layout segments returned
by pnfs_mark_layout_stateid_invalid().
Fixes: 9888d837f3 ("pNFS: Force a retry of LAYOUTGET if the stateid doesn't match our cache")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This normally doesn't cause any extra harm, but it does mean that we'll
increment the eventfd notification count, if one has been registered
with the ring. This can confuse applications, when they see more
notifications on the eventfd side than are available in the ring.
Do the nice thing and only increment this count, if we actually posted
(or even overflowed) events.
Reported-and-tested-by: Dan Melnic <dmm@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ensure we match tasks that belong to a dead or dying task as well, as we
need to reap those in addition to those belonging to the exiting task.
Cc: stable@vger.kernel.org # 5.9+
Reported-by: Josef Grieb <josef.grieb@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----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=Vbhq
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.11-2021-01-24' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Still need a final cancelation fix that isn't quite done done,
expected in the next day or two. That said, this contains:
- Wakeup fix for IOPOLL requests
- SQPOLL split close op handling fix
- Ensure that any use of io_uring fd itself is marked as inflight
- Short non-regular file read fix (Pavel)
- Fix up bad false positive warning (Pavel)
- SQPOLL fixes (Pavel)
- In-flight removal fix (Pavel)"
* tag 'io_uring-5.11-2021-01-24' of git://git.kernel.dk/linux-block:
io_uring: account io_uring internal files as REQ_F_INFLIGHT
io_uring: fix sleeping under spin in __io_clean_op
io_uring: fix short read retries for non-reg files
io_uring: fix SQPOLL IORING_OP_CLOSE cancelation state
io_uring: fix skipping disabling sqo on exec
io_uring: fix uring_flush in exit_files() warning
io_uring: fix false positive sqo warning on flush
io_uring: iopoll requests should also wake task ->in_idle state
Merge misc fixes from Andrew Morton:
"18 patches.
Subsystems affected by this patch series: mm (pagealloc, memcg, kasan,
memory-failure, and highmem), ubsan, proc, and MAINTAINERS"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
MAINTAINERS: add a couple more files to the Clang/LLVM section
proc_sysctl: fix oops caused by incorrect command parameters
powerpc/mm/highmem: use __set_pte_at() for kmap_local()
mips/mm/highmem: use set_pte() for kmap_local()
mm/highmem: prepare for overriding set_pte_at()
sparc/mm/highmem: flush cache and TLB
mm: fix page reference leak in soft_offline_page()
ubsan: disable unsigned-overflow check for i386
kasan, mm: fix resetting page_alloc tags for HW_TAGS
kasan, mm: fix conflicts with init_on_alloc/free
kasan: fix HW_TAGS boot parameters
kasan: fix incorrect arguments passing in kasan_add_zero_shadow
kasan: fix unaligned address is unhandled in kasan_remove_zero_shadow
mm: fix numa stats for thp migration
mm: memcg: fix memcg file_dirty numa stat
mm: memcg/slab: optimize objcg stock draining
mm: fix initialization of struct page for holes in memory layout
x86/setup: don't remove E820_TYPE_RAM for pfn 0
Here are some small driver core fixes for 5.11-rc5 that resolve some
reported problems:
- revert of a -rc1 patch that was causing problems with some
machines
- device link device name collision problem fix (busses only
have to name devices unique to their bus, not unique to all
busses)
- kernfs splice bugfixes to resolve firmware loading problems
for Qualcomm systems.
- other tiny driver core fixes for minor issues reported.
All of these have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYA1qGw8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ymd2ACgzVEpWJddtLNz+9guU9kAIIPcNboAn2GreCle
vgNkgCapi2ZjYtWBk8Cl
=YNIw
-----END PGP SIGNATURE-----
Merge tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are some small driver core fixes for 5.11-rc5 that resolve some
reported problems:
- revert of a -rc1 patch that was causing problems with some machines
- device link device name collision problem fix (busses only have to
name devices unique to their bus, not unique to all busses)
- kernfs splice bugfixes to resolve firmware loading problems for
Qualcomm systems.
- other tiny driver core fixes for minor issues reported.
All of these have been in linux-next with no reported problems"
* tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: Fix device link device name collision
driver core: Extend device_is_dependent()
kernfs: wire up ->splice_read and ->splice_write
kernfs: implement ->write_iter
kernfs: implement ->read_iter
Revert "driver core: Reorder devices on successful probe"
Driver core: platform: Add extra error check in devm_platform_get_irqs_affinity()
drivers core: Free dma_range_map when driver probe failed
The process_sysctl_arg() does not check whether val is empty before
invoking strlen(val). If the command line parameter () is incorrectly
configured and val is empty, oops is triggered.
For example:
"hung_task_panic=1" is incorrectly written as "hung_task_panic", oops is
triggered. The call stack is as follows:
Kernel command line: .... hung_task_panic
......
Call trace:
__pi_strlen+0x10/0x98
parse_args+0x278/0x344
do_sysctl_args+0x8c/0xfc
kernel_init+0x5c/0xf4
ret_from_fork+0x10/0x30
To fix it, check whether "val" is empty when "phram" is a sysctl field.
Error codes are returned in the failure branch, and error logs are
generated by parse_args().
Link: https://lkml.kernel.org/r/20210118133029.28580-1-nixiaoming@huawei.com
Fixes: 3db978d480 ("kernel/sysctl: support setting sysctl parameters from kernel command line")
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: <stable@vger.kernel.org> [5.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=wHrR
-----END PGP SIGNATURE-----
Merge tag '5.11-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"An important signal handling patch for stable, and two small cleanup
patches"
* tag '5.11-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: do not fail __smb_send_rqst if non-fatal signals are pending
fs/cifs: Simplify bool comparison.
fs/cifs: Assign boolean values to a bool variable
We need to actively cancel anything that introduces a potential circular
loop, where io_uring holds a reference to itself. If the file in question
is an io_uring file, then add the request to the inflight list.
Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
RHBZ 1848178
The original intent of returning an error in this function
in the patch:
"CIFS: Mask off signals when sending SMB packets"
was to avoid interrupting packet send in the middle of
sending the data (and thus breaking an SMB connection),
but we also don't want to fail the request for non-fatal
signals even before we have had a chance to try to
send it (the reported problem could be reproduced e.g.
by exiting a child process when the parent process was in
the midst of calling futimens to update a file's timestamps).
In addition, since the signal may remain pending when we enter the
sending loop, we may end up not sending the whole packet before
TCP buffers become full. In this case the code returns -EINTR
but what we need here is to return -ERESTARTSYS instead to
allow system calls to be restarted.
Fixes: b30c74c73c ("CIFS: Mask off signals when sending SMB packets")
Cc: stable@vger.kernel.org # v5.1+
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
prompted by the fact that a bunch of code was moved in this cycle.
-----BEGIN PGP SIGNATURE-----
iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAmAK9skTHGlkcnlvbW92
QGdtYWlsLmNvbQAKCRBKf944AhHziyGwB/9rZnaaYR6Frqc2tzE5vbVtjAxvhftn
pGDr8laOHiK5jnKR+ljNlPAe07TSEK+qVidulX05moujKrZeIrDUJZnEpScrssZO
o7Tm99dHziqJc10liembtSZzB3LzGJyW1hgavC5Vjo7JW+EZ+YR9x2pFKCO7Hz/M
QlT6kQmXZLnsLB2OieAyC9Yb7IMD1wfiOHHvOZDeFpIn49Z8reFahI+dSwwK/uOv
UouxZKKuaikSTvzp8WmTiuCpsUfBMOaDy5/pWLfBS+/116K2aieJmzSjUb2MZwDT
cLGhzrkyeCkBeFO5vhnob3n9KqWXN03I9rPB25StcrHCRYcHa3z/D/4k
=9COg
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-5.11-rc5' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A patch to zero out sensitive cryptographic data and two minor
cleanups prompted by the fact that a bunch of code was moved in this
cycle"
* tag 'ceph-for-5.11-rc5' of git://github.com/ceph/ceph-client:
libceph: fix "Boolean result is used in bitwise operation" warning
libceph, ceph: disambiguate ceph_connection_operations handlers
libceph: zero out session key and connection secret
Sockets and other non-regular files may actually expect short reads to
happen, don't retry reads for them. Because non-reg files don't set
FMODE_BUF_RASYNC and so it won't do second/retry do_read, we can filter
out those cases after first do_read() attempt with ret>0.
Cc: stable@vger.kernel.org # 5.9+
Suggested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
IORING_OP_CLOSE is special in terms of cancelation, since it has an
intermediate state where we've removed the file descriptor but hasn't
closed the file yet. For that reason, it's currently marked with
IO_WQ_WORK_NO_CANCEL to prevent cancelation. This ensures that the op
is always run even if canceled, to prevent leaving us with a live file
but an fd that is gone. However, with SQPOLL, since a cancel request
doesn't carry any resources on behalf of the request being canceled, if
we cancel before any of the close op has been run, we can end up with
io-wq not having the ->files assigned. This can result in the following
oops reported by Joseph:
BUG: kernel NULL pointer dereference, address: 00000000000000d8
PGD 800000010b76f067 P4D 800000010b76f067 PUD 10b462067 PMD 0
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 1788 Comm: io_uring-sq Not tainted 5.11.0-rc4 #1
Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
RIP: 0010:__lock_acquire+0x19d/0x18c0
Code: 00 00 8b 1d fd 56 dd 08 85 db 0f 85 43 05 00 00 48 c7 c6 98 7b 95 82 48 c7 c7 57 96 93 82 e8 9a bc f5 ff 0f 0b e9 2b 05 00 00 <48> 81 3f c0 ca 67 8a b8 00 00 00 00 41 0f 45 c0 89 04 24 e9 81 fe
RSP: 0018:ffffc90001933828 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000d8
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888106e8a140 R15: 00000000000000d8
FS: 0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000d8 CR3: 0000000106efa004 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x31a/0x440
? close_fd_get_file+0x39/0x160
? __lock_acquire+0x647/0x18c0
_raw_spin_lock+0x2c/0x40
? close_fd_get_file+0x39/0x160
close_fd_get_file+0x39/0x160
io_issue_sqe+0x1334/0x14e0
? lock_acquire+0x31a/0x440
? __io_free_req+0xcf/0x2e0
? __io_free_req+0x175/0x2e0
? find_held_lock+0x28/0xb0
? io_wq_submit_work+0x7f/0x240
io_wq_submit_work+0x7f/0x240
io_wq_cancel_cb+0x161/0x580
? io_wqe_wake_worker+0x114/0x360
? io_uring_get_socket+0x40/0x40
io_async_find_and_cancel+0x3b/0x140
io_issue_sqe+0xbe1/0x14e0
? __lock_acquire+0x647/0x18c0
? __io_queue_sqe+0x10b/0x5f0
__io_queue_sqe+0x10b/0x5f0
? io_req_prep+0xdb/0x1150
? mark_held_locks+0x6d/0xb0
? mark_held_locks+0x6d/0xb0
? io_queue_sqe+0x235/0x4b0
io_queue_sqe+0x235/0x4b0
io_submit_sqes+0xd7e/0x12a0
? _raw_spin_unlock_irq+0x24/0x30
? io_sq_thread+0x3ae/0x940
io_sq_thread+0x207/0x940
? do_wait_intr_irq+0xc0/0xc0
? __ia32_sys_io_uring_enter+0x650/0x650
kthread+0x134/0x180
? kthread_create_worker_on_cpu+0x90/0x90
ret_from_fork+0x1f/0x30
Fix this by moving the IO_WQ_WORK_NO_CANCEL until _after_ we've modified
the fdtable. Canceling before this point is totally fine, and running
it in the io-wq context _after_ that point is also fine.
For 5.12, we'll handle this internally and get rid of the no-cancel
flag, as IORING_OP_CLOSE is the only user of it.
Cc: stable@vger.kernel.org
Fixes: b5dba59e0c ("io_uring: add support for IORING_OP_CLOSE")
Reported-by: "Abaci <abaci@linux.alibaba.com>"
Reviewed-and-tested-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAmAJfUoACgkQnJ2qBz9k
QNnH+Qf/Q/e0zGxGW7Snj6Kz4VL9yHwfvQUdZPFashv+Uff1jnPkXQbnJia2mUNE
6g4XsMTuXTF13TvNmf93MBHAmlJSicUfRNqyDx9HP0VrNy2NarIwDcN4yAoOs2cZ
jwzwOVDJmDf/EALVv+6JUySRq/v5f4EEihtYjVEXxVNh7rZiLOBYnY5wPLvicU3h
ButzuOnH0F4aqBKuZsanJYDIswmJ05awxy4wu4SWoyghc+KUc61pXeND1KHa4LoR
1A4NL7OcjZkpHvaWCw8FKgEQnyTyvbi78aSSrOLcZhdT6l5jQt8xaRwz66zk9Yw2
mxQe9YefTcvlmm8iNn3B7QxMmJmZ7g==
=agn9
-----END PGP SIGNATURE-----
Merge tag 'fs_for_v5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fs and udf fixes from Jan Kara:
"A lazytime handling fix from Eric Biggers and a fix of UDF session
handling for large devices"
* tag 'fs_for_v5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf: fix the problem that the disc content is not displayed
fs: fix lazytime expiration handling in __writeback_single_inode()
Wire up the splice_read and splice_write methods to the default
helpers using ->read_iter and ->write_iter now that those are
implemented for kernfs. This restores support to use splice and
sendfile on kernfs files.
Fixes: 36e2c7421f ("fs: don't allow splice read/write without explicit ops")
Reported-by: Siddharth Gupta <sidgup@codeaurora.org>
Tested-by: Siddharth Gupta <sidgup@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210120204631.274206-4-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Switch kernfs to implement the write_iter method instead of plain old
write to prepare to supporting splice and sendfile again.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210120204631.274206-3-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Switch kernfs to implement the read_iter method instead of plain old
read to prepare to supporting splice and sendfile again.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210120204631.274206-2-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----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=gSYr
-----END PGP SIGNATURE-----
Merge tag 'for-5.11-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few more one line fixes for various bugs, stable material.
- fix send when emitting clone operation from the same file and root
- fix double free on error when cleaning backrefs
- lockdep fix during relocation
- handle potential error during reloc when starting transaction
- skip running delayed refs during commit (leftover from code removal
in this dev cycle)"
* tag 'for-5.11-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: don't clear ret in btrfs_start_dirty_block_groups
btrfs: fix lockdep splat in btrfs_recover_relocation
btrfs: do not double free backref nodes on error
btrfs: don't get an EINTR during drop_snapshot for reloc
btrfs: send: fix invalid clone operations when cloning from the same file and root
btrfs: no need to run delayed refs after commit_fs_roots during commit
After the recent actions to convert readpages aops to readahead, the
NULL checks of readpages aops in cachefiles_read_or_alloc_page() may
hit falsely. More badly, it's an ASSERT() call, and this panics.
Drop the superfluous NULL checks for fixing this regression.
[DH: Note that cachefiles never actually used readpages, so this check was
never actually necessary]
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208883
BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=1175245
Fixes: 9ae326a690 ("CacheFiles: A cache that backs onto a mounted filesystem")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Avoid exposing parent of root directory in NFSv3 READDIRPLUS results
- Fix a tracepoint change that went in the initial 5.11 merge
-----BEGIN PGP SIGNATURE-----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=Qf5O
-----END PGP SIGNATURE-----
Merge tag 'nfsd-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Avoid exposing parent of root directory in NFSv3 READDIRPLUS results
- Fix a tracepoint change that went in the initial 5.11 merge
* tag 'nfsd-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
SUNRPC: Move the svc_xdr_recvfrom tracepoint again
nfsd4: readdirplus shouldn't return parent of export
If we fail to update a block group item in the loop we'll break, however
we'll do btrfs_run_delayed_refs and lose our error value in ret, and
thus not clean up properly. Fix this by only running the delayed refs
if there was no failure.
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Zygo reported the following KASAN splat:
BUG: KASAN: use-after-free in btrfs_backref_cleanup_node+0x18a/0x420
Read of size 8 at addr ffff888112402950 by task btrfs/28836
CPU: 0 PID: 28836 Comm: btrfs Tainted: G W 5.10.0-e35f27394290-for-next+ #23
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack+0xbc/0xf9
? btrfs_backref_cleanup_node+0x18a/0x420
print_address_description.constprop.8+0x21/0x210
? record_print_text.cold.34+0x11/0x11
? btrfs_backref_cleanup_node+0x18a/0x420
? btrfs_backref_cleanup_node+0x18a/0x420
kasan_report.cold.10+0x20/0x37
? btrfs_backref_cleanup_node+0x18a/0x420
__asan_load8+0x69/0x90
btrfs_backref_cleanup_node+0x18a/0x420
btrfs_backref_release_cache+0x83/0x1b0
relocate_block_group+0x394/0x780
? merge_reloc_roots+0x4a0/0x4a0
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
? check_flags.part.50+0x6c/0x1e0
? btrfs_relocate_chunk+0x120/0x120
? kmem_cache_alloc_trace+0xa06/0xcb0
? _copy_from_user+0x83/0xc0
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
? __kasan_check_read+0x11/0x20
? check_chain_key+0x1f4/0x2f0
? __asan_loadN+0xf/0x20
? btrfs_ioctl_get_supported_features+0x30/0x30
? kvm_sched_clock_read+0x18/0x30
? check_chain_key+0x1f4/0x2f0
? lock_downgrade+0x3f0/0x3f0
? handle_mm_fault+0xad6/0x2150
? do_vfs_ioctl+0xfc/0x9d0
? ioctl_file_clone+0xe0/0xe0
? check_flags.part.50+0x6c/0x1e0
? check_flags.part.50+0x6c/0x1e0
? check_flags+0x26/0x30
? lock_is_held_type+0xc3/0xf0
? syscall_enter_from_user_mode+0x1b/0x60
? do_syscall_64+0x13/0x80
? rcu_read_lock_sched_held+0xa1/0xd0
? __kasan_check_read+0x11/0x20
? __fget_light+0xae/0x110
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4c4bdfe427
Allocated by task 28836:
kasan_save_stack+0x21/0x50
__kasan_kmalloc.constprop.18+0xbe/0xd0
kasan_kmalloc+0x9/0x10
kmem_cache_alloc_trace+0x410/0xcb0
btrfs_backref_alloc_node+0x46/0xf0
btrfs_backref_add_tree_node+0x60d/0x11d0
build_backref_tree+0xc5/0x700
relocate_tree_blocks+0x2be/0xb90
relocate_block_group+0x2eb/0x780
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 28836:
kasan_save_stack+0x21/0x50
kasan_set_track+0x20/0x30
kasan_set_free_info+0x1f/0x30
__kasan_slab_free+0xf3/0x140
kasan_slab_free+0xe/0x10
kfree+0xde/0x200
btrfs_backref_error_cleanup+0x452/0x530
build_backref_tree+0x1a5/0x700
relocate_tree_blocks+0x2be/0xb90
relocate_block_group+0x2eb/0x780
btrfs_relocate_block_group+0x26e/0x4c0
btrfs_relocate_chunk+0x52/0x120
btrfs_balance+0xe2e/0x1900
btrfs_ioctl_balance+0x3a7/0x460
btrfs_ioctl+0x24c8/0x4360
__x64_sys_ioctl+0xc3/0x100
do_syscall_64+0x37/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
This occurred because we freed our backref node in
btrfs_backref_error_cleanup(), but then tried to free it again in
btrfs_backref_release_cache(). This is because
btrfs_backref_release_cache() will cycle through all of the
cache->leaves nodes and free them up. However
btrfs_backref_error_cleanup() freed the backref node with
btrfs_backref_free_node(), which simply kfree()d the backref node
without unlinking it from the cache. Change this to a
btrfs_backref_drop_node(), which does the appropriate cleanup and
removes the node from the cache->leaves list, so when we go to free the
remaining cache we don't trip over items we've already dropped.
Fixes: 75bfb9aff4 ("Btrfs: cleanup error handling in build_backref_tree")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This was partially fixed by f3e3d9cc35 ("btrfs: avoid possible signal
interruption of btrfs_drop_snapshot() on relocation tree"), however it
missed a spot when we restart a trans handle because we need to end the
transaction. The fix is the same, simply use btrfs_join_transaction()
instead of btrfs_start_transaction() when deleting reloc roots.
Fixes: f3e3d9cc35 ("btrfs: avoid possible signal interruption of btrfs_drop_snapshot() on relocation tree")
CC: stable@vger.kernel.org # 5.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When the capacity of the disc is too large (assuming the 4.7G
specification), the disc (UDF file system) will be burned
multiple times in the windows (Multisession Usage). When the
remaining capacity of the CD is less than 300M (estimated
value, for reference only), open the CD in the Linux system,
the content of the CD is displayed as blank (the kernel will
say "No VRS found"). Windows can display the contents of the
CD normally.
Through analysis, in the "fs/udf/super.c": udf_check_vsd
function, the actual value of VSD_MAX_SECTOR_OFFSET may
be much larger than 0x800000. According to the current code
logic, it is found that the type of sbi->s_session is "__s32",
when the remaining capacity of the disc is less than 300M
(take a set of test values: sector=3154903040,
sbi->s_session=1540464, sb->s_blocksize_bits=11 ), the
calculation result of "sbi->s_session << sb->s_blocksize_bits"
will overflow. Therefore, it is necessary to convert the
type of s_session to "loff_t" (when udf_check_vsd starts,
assign a value to _sector, which is also converted in this
way), so that the result will not overflow, and then the
content of the disc can be displayed normally.
Link: https://lore.kernel.org/r/20210114075741.30448-1-changlianzhi@uniontech.com
Signed-off-by: lianzhi chang <changlianzhi@uniontech.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Fix the follow warnings:
./fs/cifs/connect.c: WARNING: Comparison of 0/1 to bool variable
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Fix the following coccicheck warnings:
./fs/cifs/connect.c:3386:2-21: WARNING: Assignment of 0/1 to
bool variable.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pull misc vfs fixes from Al Viro:
"Several assorted fixes.
I still think that audit ->d_name race is better fixed this way for
the benefit of backports, with any possibly fancier variants done on
top of it"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
dump_common_audit_data(): fix racy accesses to ->d_name
iov_iter: fix the uaccess area in copy_compat_iovec_from_user
umount(2): move the flag validity checks first
If there are no requests at the time __io_uring_task_cancel() is called,
tctx_inflight() returns zero and and it terminates not getting a chance
to go through __io_uring_files_cancel() and do
io_disable_sqo_submit(). And we absolutely want them disabled by the
time cancellation ends.
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Fixes: d9d05217cb ("io_uring: stop SQPOLL submit on creator's death")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
WARNING: CPU: 1 PID: 11100 at fs/io_uring.c:9096
io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
RIP: 0010:io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Call Trace:
filp_close+0xb4/0x170 fs/open.c:1280
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:416 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:433
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3e9/0x20a0 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
An SQPOLL ring creator task may have gotten rid of its file note during
exit and called io_disable_sqo_submit(), but the io_uring is still left
referenced through fdtable, which will be put during close_files() and
cause a false positive warning.
First split the warning into two for more clarity when is hit, and the
add sqo_dead check to handle the described case.
Reported-by: syzbot+a32b546d58dde07875a1@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
WARNING: CPU: 1 PID: 9094 at fs/io_uring.c:8884
io_disable_sqo_submit+0x106/0x130 fs/io_uring.c:8884
Call Trace:
io_uring_flush+0x28b/0x3a0 fs/io_uring.c:9099
filp_close+0xb4/0x170 fs/open.c:1280
close_fd+0x5c/0x80 fs/file.c:626
__do_sys_close fs/open.c:1299 [inline]
__se_sys_close fs/open.c:1297 [inline]
__x64_sys_close+0x2f/0xa0 fs/open.c:1297
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
io_uring's final close() may be triggered by any task not only the
creator. It's well handled by io_uring_flush() including SQPOLL case,
though a warning in io_disable_sqo_submit() will fallaciously fire by
moving this warning out to the only call site that matters.
Reported-by: syzbot+2f5d1785dc624932da78@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we're freeing/finishing iopoll requests, ensure we check if the task
is in idling in terms of cancelation. Otherwise we could end up waiting
forever in __io_uring_task_cancel() if the task has active iopoll
requests that need cancelation.
Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----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=XL14
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"We still have a pending fix for a cancelation issue, but it's still
being investigated. In the meantime:
- Dead mm handling fix (Pavel)
- SQPOLL setup error handling (Pavel)
- Flush timeout sequence fix (Marcelo)
- Missing finish_wait() for one exit case"
* tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block:
io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
io_uring: flush timeouts that should already have expired
io_uring: do sqo disable on install_fd error
io_uring: fix null-deref in io_disable_sqo_submit
io_uring: don't take files/mm for a dead task
io_uring: drop mm and files after task_work_run
