linux-block.git
11 months agobcachefs: When fsck finds redundant snapshot keys, trigger snapshots cleanup
Kent Overstreet [Sun, 17 Jul 2022 03:21:15 +0000 (23:21 -0400)]
bcachefs: When fsck finds redundant snapshot keys, trigger snapshots cleanup

Fsck now checks for keys in different snapshot IDs that are now
redundant due to other snapshots being deleted - it needs to for its own
algorithms to not get confused.

When it detects this it should re-run the post snapshot deletion cleanup
- this patch does that.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve fsck for subvols/snapshots
Kent Overstreet [Thu, 14 Jul 2022 09:44:10 +0000 (05:44 -0400)]
bcachefs: Improve fsck for subvols/snapshots

 - Bunch of refactoring, and move some code out of
   bch2_snapshots_start() and into bch2_snapshots_check(), for constency
   with the rest of fsck

 - Interior snapshot nodes no longer point to a subvolume; this is so we
   don't end up with dangling subvol references when deleting or require
   scanning the full snapshots btree.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve snapshots_seen
Kent Overstreet [Thu, 14 Jul 2022 06:47:36 +0000 (02:47 -0400)]
bcachefs: Improve snapshots_seen

This makes the snapshots_seen data structure fsck private and improves
it; we now also track the equivalence class for each snapshot id we've
seen, which means we can detect when snapshot deletion hasn't finished
or run correctly (which will otherwise confuse fsck).

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix subvol/snapshot deleting in recovery
Kent Overstreet [Thu, 14 Jul 2022 05:10:24 +0000 (01:10 -0400)]
bcachefs: Fix subvol/snapshot deleting in recovery

fsck doesn't want to run while we're cleaning up deleted snapshots - if
that work needs to be done, we want it to have finished before fsck
runs, otherwise fsck will get confused when it finds multiple keys in
the same snapshot ID equivalence class (i.e. the mechanism that
snapshot deletion uses for cleaning up redundant keys).

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: fsck_inode_rm() shouldn't delete subvols
Kent Overstreet [Thu, 14 Jul 2022 04:44:09 +0000 (00:44 -0400)]
bcachefs: fsck_inode_rm() shouldn't delete subvols

We should never see an inode marked as unlinked that's a subvolume root
(or a directory) in fsck, but even if we do it's not correct for fsck to
delete the subvolume: subvolumes are owned by dirents, and if we find a
dangling subvolume (not marked as unlinked) we want fsck to reattach it.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Switch data_update path to snapshot_id_list
Kent Overstreet [Thu, 14 Jul 2022 06:34:48 +0000 (02:34 -0400)]
bcachefs: Switch data_update path to snapshot_id_list

snapshots_seen is becoming private to fsck, and snapshot_id_list is
actually what the data update path needs.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix snapshot deletion
Kent Overstreet [Tue, 12 Jul 2022 13:11:52 +0000 (09:11 -0400)]
bcachefs: Fix snapshot deletion

Snapshots being deleted won't in general have a corresponding subvolume:
this fixes a spurious fsck error where we'd complain about a snapshot
pointing to a missing subvolume - but the subvolume had been deleted,
and the snapshot was pending deletion as well.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Rename __bch2_trans_do() -> commit_do()
Kent Overstreet [Wed, 13 Jul 2022 09:25:29 +0000 (05:25 -0400)]
bcachefs: Rename __bch2_trans_do() -> commit_do()

Better/more descriptive naming, and prep for adding
nested_lockrestart_do() and nested_commit_do().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Silence some fsck errors when reconstructing alloc info
Kent Overstreet [Tue, 12 Jul 2022 01:06:52 +0000 (21:06 -0400)]
bcachefs: Silence some fsck errors when reconstructing alloc info

There's no need to print fsck errors for errors that are expected, and
the user has already opted to repair.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Put some repair messages behind opts->verbose
Kent Overstreet [Tue, 12 Jul 2022 02:32:04 +0000 (22:32 -0400)]
bcachefs: Put some repair messages behind opts->verbose

These messages log the updates we're doing in bch2_check_fix_ptrs(),
which is useful when debugging but not usually needed.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Silence unimportant tracepoints
Kent Overstreet [Tue, 5 Jul 2022 20:46:40 +0000 (16:46 -0400)]
bcachefs: Silence unimportant tracepoints

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix move path when move_stats == NULL
Kent Overstreet [Wed, 29 Jun 2022 21:14:06 +0000 (17:14 -0400)]
bcachefs: Fix move path when move_stats == NULL

This isn't done very often, but it is legitimate

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Get ref on c->writes in move.c
Kent Overstreet [Mon, 20 Jun 2022 23:43:35 +0000 (19:43 -0400)]
bcachefs: Get ref on c->writes in move.c

There's no point reading an extent in order to move it if the write is
going to fail because we're shutting down. This patch changes the move
path so that moving_io now owns a ref on c->writes - as a bonus,
rebalance and copygc will now notice that we're shutting down and exit
quicker.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: move.c refactoring
Kent Overstreet [Mon, 20 Jun 2022 19:40:26 +0000 (15:40 -0400)]
bcachefs: move.c refactoring

 - add bch2_moving_ctxt_(init|exit)
 - split out __bch2_evacutae_bucket() which takes an existing
   moving_ctxt, this will be used for improving copygc performance by
   pipelining across multiple buckets

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: data jobs, including rebalance wait for copygc.
Daniel Hill [Wed, 15 Jun 2022 14:06:43 +0000 (02:06 +1200)]
bcachefs: data jobs, including rebalance wait for copygc.

move_ratelimit() now has a bool that specifies whether we want to
wait for copygc to finish.

When copygc is running, we're probably low on free buckets instead
of consuming the remaining buckets, we want to wait for copygc to
finish.

This should help with performance, and run away bucket fragmentation.

Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Redo data_update interface
Kent Overstreet [Mon, 13 Jun 2022 23:17:45 +0000 (19:17 -0400)]
bcachefs: Redo data_update interface

This patch significantly cleans up and simplifies the data_update
interface. Instead of only being able to specify a single pointer by
device to rewrite, we're now able to specify any or all of the pointers
in the original extent to be rewrited, as a bitmask.

data_cmd is no more: the various pred functions now just return true if
the extent should be moved/updated. All the data_update path does is
rewrite existing replicas, or add new ones.

This fixes a bug where with background compression on replicated
filesystems, where rebalance -> data_update would incorrectly drop the
wrong old replica, and keep trying to recompress an extent pointer and
each time failing to drop the right replica. Oops.

Now, the data update path doesn't look at the io options to decide which
pointers to keep and which to drop - it only goes off of the
data_update_options passed to it.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix bch2_check_alloc_key()
Kent Overstreet [Mon, 27 Jun 2022 00:34:34 +0000 (20:34 -0400)]
bcachefs: Fix bch2_check_alloc_key()

bch2_check_alloc_key() was failing to check buckets that didn't have
alloc keys yet (because they'd never been used) - they still need to be
added to the freespace btree.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve bch2_check_alloc_info
Kent Overstreet [Mon, 20 Jun 2022 02:43:00 +0000 (22:43 -0400)]
bcachefs: Improve bch2_check_alloc_info

 - In check_alloc_key(), previously we were re-initializing iterators
   for the need_discard and freespace btrees for every alloc key we
   checked. But this was causing us to redo lookups into the journal
   keys every time, since those lookups are cached in struct btree_iter.
   This initializes the iterators in bch2_check_alloc_info and passes
   them into check_alloc_key().

 - Make the looping more consistent/efficient in bch2_check_alloc_info()

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Use BTREE_INSERT_LAZY_RW in bch2_check_alloc_info()
Kent Overstreet [Sun, 26 Jun 2022 22:31:51 +0000 (18:31 -0400)]
bcachefs: Use BTREE_INSERT_LAZY_RW in bch2_check_alloc_info()

This runs before we go rw for journal replay, but after we're allowed to
go rw. It might be time to consider killing BTREE_INSERT_LAZY_RW,
though.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Bucket invalidate path improvements
Kent Overstreet [Tue, 21 Jun 2022 02:26:41 +0000 (22:26 -0400)]
bcachefs: Bucket invalidate path improvements

 - invalidate_one_bucket() now returns 1 when we don't have any buckets
   on this device to invalidate, ensuring we don't spin
 - the tracepoint invocation is moved to after the transaction commit,
   and we now include the number of cached sectors in the tracepoint

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Don't BUG_ON() inode link count underflow
Kent Overstreet [Thu, 23 Jun 2022 22:26:01 +0000 (18:26 -0400)]
bcachefs: Don't BUG_ON() inode link count underflow

This switches that assertion to a bch2_trans_inconsistent() call, as it
should be.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Always descend to leaf nodes it btree_gc
Kent Overstreet [Thu, 23 Jun 2022 02:53:43 +0000 (22:53 -0400)]
bcachefs: Always descend to leaf nodes it btree_gc

If a btree node is unreadable, it's the topology repair that fixes that
and it's kicked off by btree_gc, so btree_gc needs to touch every node
and very that they can be read.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: fix __dev_available().
Daniel Hill [Wed, 22 Jun 2022 22:28:30 +0000 (10:28 +1200)]
bcachefs: fix __dev_available().

__dev_available() now calculates available buckets correctly. Previously
it would almost always return 0 when we have cached data.

Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Fix assertion in topology repair
Kent Overstreet [Thu, 23 Jun 2022 01:33:43 +0000 (21:33 -0400)]
bcachefs: Fix assertion in topology repair

If we were at the end of the node, when breaking out of the loop we'd
pop the assertion on line 446 when cur wasn't NULL.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Make verbose option settable at runtime
Kent Overstreet [Wed, 22 Jun 2022 21:56:25 +0000 (17:56 -0400)]
bcachefs: Make verbose option settable at runtime

-o verbose is very useful, and we're starting to use it more for runtime
debug statements - making it possible to enable at runtime is a no
brainer.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve "copygc requested to run" error message
Kent Overstreet [Fri, 17 Jun 2022 22:30:17 +0000 (18:30 -0400)]
bcachefs: Improve "copygc requested to run" error message

This improves the "copygc requested to run but no buckets found" to show
the device that requires copygc to be run on - we'll definitely need to
improve this more.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Pull out data_update.c
Kent Overstreet [Mon, 13 Jun 2022 23:07:19 +0000 (19:07 -0400)]
bcachefs: Pull out data_update.c

This is the start of reorganizing the data IO paths. The plan is to also
break apart io.c into data_read.c and data_write.c, and migrate_write
will be renamed to the data_update path.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Split out dev_buckets_free()
Kent Overstreet [Tue, 14 Jun 2022 21:51:20 +0000 (17:51 -0400)]
bcachefs: Split out dev_buckets_free()

Previously, dev_buckets_available() only counted buckets that are
eligible to be allocated right now - i.e. buckets that don't have cached
data, or need discard, or need gc gens, etc.

But most users of this function want to know how many buckets are
eligible to be allocated from without moving data around - copygc,
allocator striping, which means we should be including cached data
buckets etc.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: btree key cache pcpu freedlist
Kent Overstreet [Fri, 17 Jun 2022 05:07:54 +0000 (01:07 -0400)]
bcachefs: btree key cache pcpu freedlist

Originally, the btree key cache code would always allocate new entries
by reusing from the recently-freed list, if that list wasn't empty. But
that behaviour was dropped, for lock contention reasons.

But it seems that entries stranded on the freed list have been
contributing to some of our oom issues, because long running btree
transactions will prevent them from being freed.

This patch re-adds allocating from the freed list, but it also adds
percpu buffers to solve the lock contention issues - and the new percpu
freed lists will improve the evict paths, too.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Make IO in flight by copygc/rebalance configurable
Kent Overstreet [Mon, 20 Jun 2022 03:03:07 +0000 (23:03 -0400)]
bcachefs: Make IO in flight by copygc/rebalance configurable

This adds a new option, move_bytes_in_flight, for configuring the amount
of IO in flight by copygc/rebalance - users with many devices in their
filesystem will want to increase this.

In the future we should be smarter about this, but this is an easy
improvement.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Check for extents with too many ptrs
Kent Overstreet [Fri, 17 Jun 2022 02:38:10 +0000 (22:38 -0400)]
bcachefs: Check for extents with too many ptrs

We have a hardcoded maximum on number of pointers in an extent that's
used by some other data structures - notably bch_devs_list - but we
weren't actually checking for it. Oops.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix refcount leak in bch2_do_invalidates()
Kent Overstreet [Mon, 20 Jun 2022 23:48:16 +0000 (19:48 -0400)]
bcachefs: Fix refcount leak in bch2_do_invalidates()

If we fail to queue the work item because it's already in process, we
need to drop the ref we just took.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Always use percpu_ref_tryget_live() on c->writes
Kent Overstreet [Sat, 18 Jun 2022 23:55:32 +0000 (19:55 -0400)]
bcachefs: Always use percpu_ref_tryget_live() on c->writes

If we're trying to get a ref and the refcount has been killed, it means
we're doing an emergency shutdown - we always want tryget_live().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve checksum error messages
Kent Overstreet [Sat, 18 Jun 2022 23:03:25 +0000 (19:03 -0400)]
bcachefs: Improve checksum error messages

We're seeing checksum errors in the bch2_rechecksum_bio() path - give it
a better error message to help track this down.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve an error message
Kent Overstreet [Sat, 18 Jun 2022 00:12:02 +0000 (20:12 -0400)]
bcachefs: Improve an error message

When inserting a key type that's not valid for a given btree, we should
print out which btree we were inserting into.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Fix assertion in bch2_dev_list_add_dev()
Kent Overstreet [Fri, 17 Jun 2022 23:15:26 +0000 (19:15 -0400)]
bcachefs: Fix assertion in bch2_dev_list_add_dev()

We were only allowing 4 devices in a dev_list, not 16.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Increase max size for btree_trans bump allocator
Kent Overstreet [Thu, 19 May 2022 19:29:50 +0000 (15:29 -0400)]
bcachefs: Increase max size for btree_trans bump allocator

With backpointers, alloc keys have gotten bigger, so we're needing more
memory here.

We're probably going to need to go with something more sophisticated
than a bump allocator, but - let's see if we can avoid doing that just
yet.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Add a persistent counter for bucket discards
Kent Overstreet [Tue, 14 Jun 2022 03:32:09 +0000 (23:32 -0400)]
bcachefs: Add a persistent counter for bucket discards

Like the previous patch for bucket invalidates, add another counter for
a core allocator path.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix btree node read retries
Kent Overstreet [Tue, 14 Jun 2022 05:37:16 +0000 (01:37 -0400)]
bcachefs: Fix btree node read retries

b->written wasn't being reset to 0 in the btree node read retry path,
causing decrypting & validation of previously read bsets to not be
re-run - ouch.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Add a persistent counter for bucket invalidation
Kent Overstreet [Mon, 13 Jun 2022 23:45:07 +0000 (19:45 -0400)]
bcachefs: Add a persistent counter for bucket invalidation

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Call bch2_do_invalidates() when going read write
Kent Overstreet [Mon, 13 Jun 2022 23:34:17 +0000 (19:34 -0400)]
bcachefs: Call bch2_do_invalidates() when going read write

Like bch2_do_discards(), we should check if this needs to be done when
going rw.

Also, add some sysfs code for debugging bucket invalidation.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improved human readable integer parsing
Kent Overstreet [Fri, 10 Jun 2022 23:45:19 +0000 (19:45 -0400)]
bcachefs: Improved human readable integer parsing

Printbufs recently switched to using string_get_size() for printing
integers in human readable units. This updates __bch2_strtoh() to parse
numbers printed by string_get_size() - we now have to handle floating
point numbers, and new unit suffixes.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix freespace initialization
Kent Overstreet [Fri, 10 Jun 2022 23:39:00 +0000 (19:39 -0400)]
bcachefs: Fix freespace initialization

bch2_dev_freespace_init() was using __bch2_trans_do() incorrectly, and
calling bch2_bucket_do_index() with a stale alloc key.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Printbuf rework
Kent Overstreet [Sat, 4 Feb 2023 02:01:40 +0000 (21:01 -0500)]
bcachefs: Printbuf rework

This converts bcachefs to the modern printbuf interface/implementation,
synced with the version to be submitted upstream.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Fix btree node read error path
Kent Overstreet [Tue, 7 Jun 2022 02:09:11 +0000 (22:09 -0400)]
bcachefs: Fix btree node read error path

We were forgetting to clear the read_in_flight flag - oops. This also
fixes it to not call bch2_fatal_error() before topology repair has had a
chance to do its thing.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix btree_and_journal_iter
Kent Overstreet [Tue, 7 Jun 2022 01:59:34 +0000 (21:59 -0400)]
bcachefs: Fix btree_and_journal_iter

We had a bug where btree_and_journal_iter would return the same key
twice - after deleting it (perhaps because it was present in both the
btree and the journal?)

This reworks btree_and_journal_iter to track the current position, much
like btree_paths, which makes the logic considerably simpler and more
robust.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix for cmd_list_journal
Kent Overstreet [Tue, 7 Jun 2022 03:04:33 +0000 (23:04 -0400)]
bcachefs: Fix for cmd_list_journal

cmd_list_journal wasn't correctly listing the most recent journal
entries as blacklisted - because in the recovery path when just reading
the journal, we were failing to add those to the blacklist table.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Also log overwrites in journal
Kent Overstreet [Sun, 5 Jun 2022 19:32:57 +0000 (15:32 -0400)]
bcachefs: Also log overwrites in journal

Lately we've been doing a lot of debugging by looking at the journal to
see what was changed, and by what code path. This patch adds a new
journal entry type for recording overwrites, so that we don't have to
search backwards through the journal to see what was being overwritten
in order to work out what the triggers were supposed to be doing.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Refactor journal entry adding
Kent Overstreet [Sun, 5 Jun 2022 19:29:00 +0000 (15:29 -0400)]
bcachefs: Refactor journal entry adding

This takes copying the payload out of bch2_journal_add_entry(), which
means we can use it for journal_transaction_name() - also prep work for
journalling overwrites.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Add some missing error messages
Kent Overstreet [Sat, 4 Jun 2022 18:49:02 +0000 (14:49 -0400)]
bcachefs: Add some missing error messages

bch2_opt_parse() was failing to generate error messages in error path.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix memory corruption in encryption path
Kent Overstreet [Fri, 3 Jun 2022 06:34:14 +0000 (02:34 -0400)]
bcachefs: Fix memory corruption in encryption path

When do_encrypt() was passed a vmalloc address and the buffer spanned
more than a single page, we were encrypting/decrypting completely
different pages than the ones intended.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: bch2_trans_reset_updates()
Kent Overstreet [Sun, 29 May 2022 15:38:48 +0000 (11:38 -0400)]
bcachefs: bch2_trans_reset_updates()

Factor out a new helper.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix error checking in bch2_fs_alloc()
Kent Overstreet [Sat, 28 May 2022 20:21:01 +0000 (16:21 -0400)]
bcachefs: Fix error checking in bch2_fs_alloc()

One of the init calls had a ; instead of a ?:, and errors after that got
dropped - oops.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Print message on btree node read retry success
Kent Overstreet [Thu, 26 May 2022 19:19:20 +0000 (15:19 -0400)]
bcachefs: Print message on btree node read retry success

Right now, we print an error message on btree node read error, and we
print that we're retrying, but we don't explicitly say if the retry
succeeded - this makes things a little clearer.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix journal_keys_search() overhead
Kent Overstreet [Sat, 21 May 2022 17:10:39 +0000 (13:10 -0400)]
bcachefs: Fix journal_keys_search() overhead

Previously, on every btree_iter_peek() operation we were searching the
journal keys, doing a full binary search - which was slow.

This patch fixes that by saving our position in the journal keys, so
that we only do a full binary search when moving our position backwards
or a large jump forwards.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Always print when doing journal replay in fsck
Kent Overstreet [Thu, 26 May 2022 01:34:11 +0000 (21:34 -0400)]
bcachefs: Always print when doing journal replay in fsck

This logging improvement helps see when the previous fsck pass has
completed.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Rename group to label for remaining strings.
Daniel Hill [Wed, 25 May 2022 02:57:39 +0000 (14:57 +1200)]
bcachefs: Rename group to label for remaining strings.

Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Fix encryption path on arm
Kent Overstreet [Tue, 24 May 2022 02:37:01 +0000 (22:37 -0400)]
bcachefs: Fix encryption path on arm

flush_dcache_page() is not a noop on arm, but we were using
virt_to_page() instead of vmalloc_to_page() for an address on the kernel
stack - vmalloc memory, leading to an oops in flush_dcache_page().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Switch to key_type_user, not logon
Kent Overstreet [Sat, 14 May 2022 11:00:22 +0000 (07:00 -0400)]
bcachefs: Switch to key_type_user, not logon

The only difference key_type_logon and key_type_user is that
key_type_logon keys can't be read by userspace.

However, userspace has actually been adding keys to both the logon and
user keychains, because userspace fsck requires the keychain interface -
so we might as well just use user and drop the logon keychain.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: LRU repair tweaks
Kent Overstreet [Sat, 14 May 2022 10:58:51 +0000 (06:58 -0400)]
bcachefs: LRU repair tweaks

 - Drop old unneeded parameter for whether we're in initial GC - which
   was from when btree updates had to be done differently before we
   went RW.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Delete bch_writepage
Kent Overstreet [Thu, 5 May 2022 21:20:41 +0000 (17:20 -0400)]
bcachefs: Delete bch_writepage

Per Dave Chinner and the xfs folks, .writepage is no longer needed, and
it's better not to define it if .writepages is the intended path.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Make bch_option compatible with Rust ffi
Brett Holman [Tue, 3 May 2022 22:50:57 +0000 (16:50 -0600)]
bcachefs: Make bch_option compatible with Rust ffi

Rust FFI lacks support for unnamed structs and unions. The space
saved in bch_option is not enough to be significant.

Signed-off-by: Brett Holman <bholman.devel@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Put btree_trans_verify_sorted() behind debug_check_iterators
Kent Overstreet [Mon, 25 Apr 2022 06:12:03 +0000 (02:12 -0400)]
bcachefs: Put btree_trans_verify_sorted() behind debug_check_iterators

This is pretty expensive, and we've tested sufficiently with it now that
it doesn't need to be on by default.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix extent merging
Kent Overstreet [Mon, 25 Apr 2022 03:03:02 +0000 (23:03 -0400)]
bcachefs: Fix extent merging

When merging extents, we have to check that we won't overflow size
fields in any CRC entries - but the check for this was wrong, because in
the loop it was in we weren't keeping a pointer to the (packed, encoded)
CRC field.

Fix this by moving it to its own loop.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve invalid bkey error message
Kent Overstreet [Tue, 19 Apr 2022 03:43:08 +0000 (23:43 -0400)]
bcachefs: Improve invalid bkey error message

Bkeys have gotten a lot bigger since this code was written and now are
often formatted across multiple lines - while the reason a bkey is
invalid will still be short and fit on a single line. This patch prints
the error bfore the bkey, making it a bit more readable.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix journal_iters_fix()
Kent Overstreet [Thu, 21 Apr 2022 04:34:58 +0000 (00:34 -0400)]
bcachefs: Fix journal_iters_fix()

journal_iters_fix() was incorrectly rewinding iterators past keys they
had already returned, leading to those keys being double counted in the
bch2_gc() path - oops.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Go RW before bch2_check_lrus()
Kent Overstreet [Thu, 21 Apr 2022 17:13:57 +0000 (13:13 -0400)]
bcachefs: Go RW before bch2_check_lrus()

btree updates before going RW are expensive if they're in random order,
since they use the list of keys for journal replay to insert, which is
just a gap buffer.

This patch improves the bucket invalidate path so that if
bch2_check_lrus() hasn't finished it only prints warnings instead of
doing an emergency shutdown, which means we can now set BCH_FS_MAY_GO_RW
before bch2_check_lrus().

Also, the filesystem state bits are reorganized a bit.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Add persistent counters
Daniel Hill [Tue, 15 Mar 2022 08:36:33 +0000 (21:36 +1300)]
bcachefs: Add persistent counters

This adds a new superblock field for persisting counters
and adds a sysfs interface in counters/ exposing these counters.

The superblock field is ignored by older versions letting us avoid
an on disk version bump.

Each sysfs file outputs a counter that tracks since filesystem
creation and a counter for the current mount session.

Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: Tracepoint improvements
Kent Overstreet [Sun, 17 Apr 2022 22:06:31 +0000 (18:06 -0400)]
bcachefs: Tracepoint improvements

Delete some obsolete tracepoints, organize alloc tracepoints better,
make a few tracepoints more consistent.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Don't kick journal reclaim unless low on space
Kent Overstreet [Tue, 19 Apr 2022 02:03:17 +0000 (22:03 -0400)]
bcachefs: Don't kick journal reclaim unless low on space

We shouldn't kick journal reclaim unnecessarily, it's got its own timer
for that.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Lock ordering fix
Kent Overstreet [Tue, 19 Apr 2022 01:50:19 +0000 (21:50 -0400)]
bcachefs: Lock ordering fix

Can't take btree node locks while holding btree_reserve_cache_lock - it
would be nice if we could check this with lockdep.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Shutdown path improvements
Kent Overstreet [Sun, 17 Apr 2022 21:30:49 +0000 (17:30 -0400)]
bcachefs: Shutdown path improvements

We're seeing occasional firings of the assertion in the key cache
shutdown code that nr_dirty == 0, which means we must sometimes be doing
transaction commits after we've gone read only.

Cleanups & changes:
 - BCH_FS_ALLOC_CLEAN renamed to BCH_FS_CLEAN_SHUTDOWN
 - new helper bch2_btree_interior_updates_flush(), which returns true if
   it had to wait
 - bch2_btree_flush_writes() now also returns true if there were btree
   writes in flight
 - __bch2_fs_read_only now checks if btree writes were in flight in the
   shutdown loop: btree write completion does a transaction update, to
   update the pointer in the parent node
 - assert that !BCH_FS_CLEAN_SHUTDOWN in __bch2_trans_commit

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix hash_check_key()
Kent Overstreet [Sun, 17 Apr 2022 23:02:04 +0000 (19:02 -0400)]
bcachefs: Fix hash_check_key()

hash_check_key() was incorrectly handling transaction restarts - switch
it to for_each_btree_key_norestart().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Allocate some extra room in btree_key_cache_fill()
Kent Overstreet [Sun, 17 Apr 2022 21:50:47 +0000 (17:50 -0400)]
bcachefs: Allocate some extra room in btree_key_cache_fill()

If we allocate a buffer that's a bit bigger than necessary the
transaction commit path will be much less likely to have to reallocate -
which requires a transaction restart.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: bch2_btree_iter_peek_all_levels()
Kent Overstreet [Tue, 12 Apr 2022 22:04:08 +0000 (18:04 -0400)]
bcachefs: bch2_btree_iter_peek_all_levels()

This adds bch2_btree_iter_peek_all_levels(), which returns keys from
every level of the btree - interior nodes included - in monotonically
increasing order, soon to be used by the backpointers check & repair
code.

 - BTREE_ITER_ALL_LEVELS can now be passed to for_each_btree_key() to
   iterate thusly, much like BTREE_ITER_SLOTS

 - The existing algorithm in bch2_btree_iter_advance() doesn't work with
   peek_all_levels(): we have to defer the actual advancing until the
   next time we call peek, where we have the btree path traversed and
   uptodate. So, we add an advanced bit to btree_iter; when
   BTREE_ITER_ALL_LEVELS is set bch2_btree_iter_advanced() just marks
   the iterator as advanced.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
11 months agobcachefs: btree_path_set_level_(up|down)
Kent Overstreet [Thu, 14 Apr 2022 19:43:37 +0000 (15:43 -0400)]
bcachefs: btree_path_set_level_(up|down)

This adds two new helpers to btree_iter.c for changing the level of a
path up or down - to be used by the new
bch2_btree_iter_peek_all_levels().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: bch2_btree_iter_peek_slot() now works on interior nodes
Kent Overstreet [Thu, 14 Apr 2022 19:45:00 +0000 (15:45 -0400)]
bcachefs: bch2_btree_iter_peek_slot() now works on interior nodes

The new backpointers code will be using bch2_btree_iter_peek_slot() on
interior nodes - this patch updates peek_slot() to make that work.

 - Pass the correct level to bch2_journal_keys_peek_slot()
 - We should only set BTREE_ITER_CACHED or BTREE_ITER_WITH_KEY_CACHE
   when using bch2_trans_iter_init(), not bch2_trans_node_iter_init()
 - Update assertions

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: btree_update_interior.c prep for backpointers
Kent Overstreet [Thu, 14 Apr 2022 19:37:16 +0000 (15:37 -0400)]
bcachefs: btree_update_interior.c prep for backpointers

Previously, btree_update_interior.c passed keys to bch2_trans_mark_*
that hadn't been fully initialized - they didn't have the key field
filled out, just the value.

With backpointers, we need to make sure keys are fully initialized
before marking them - because the backpointer points back to the
original key.

This patch tweaks the interior update paths to fix this.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Plumb btree_id & level to trans_mark
Kent Overstreet [Fri, 1 Apr 2022 01:44:55 +0000 (21:44 -0400)]
bcachefs: Plumb btree_id & level to trans_mark

For backpointers, we'll need the full key location - that means btree_id
and btree level. This patch plumbs it through.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve some fsck error messages
Kent Overstreet [Sat, 16 Apr 2022 22:59:58 +0000 (18:59 -0400)]
bcachefs: Improve some fsck error messages

We have string names for d_type; use it.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Go emergency RO when i_blocks underflows
Kent Overstreet [Sat, 16 Apr 2022 20:06:59 +0000 (16:06 -0400)]
bcachefs: Go emergency RO when i_blocks underflows

This improves some of our warnings and assertions - they imply possible
filesystem inconsistencies, so they should be calling
bch2_fs_inconsistent().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Ensure sysfs show fns print a newline
Kent Overstreet [Fri, 15 Apr 2022 00:30:30 +0000 (20:30 -0400)]
bcachefs: Ensure sysfs show fns print a newline

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Kill old rebuild_replicas option
Kent Overstreet [Wed, 13 Apr 2022 00:03:19 +0000 (20:03 -0400)]
bcachefs: Kill old rebuild_replicas option

This option was useful when the replicas mechism was new and still being
debugged, but hasn't been used in ages - let's delete it.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: In fsck, pass BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE when deleting dirents
Kent Overstreet [Tue, 12 Apr 2022 17:09:09 +0000 (13:09 -0400)]
bcachefs: In fsck, pass BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE when deleting dirents

A user reported an error where we hit an assertion due to deleting a key
in an internal snapshot node, when deleting a dirent that points to a
nonexisting inode.

We try to avoid doing updates to keys for internal snapshot nodes, but
upon inspection of the places where we remove dirents in fsck it appears
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE is correct for all of them: either
the target dirent doesn't exist, or it's a directory with multiple
dirents pointing to it.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix for getting stuck in journal replay
Kent Overstreet [Tue, 12 Apr 2022 05:31:33 +0000 (01:31 -0400)]
bcachefs: Fix for getting stuck in journal replay

In journal replay, we weren't immediately dropping journal pins when we
start doing updates that ewern't from journal replay - leading to
journal reclaim getting stuck.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve error logging in fsck.c
Kent Overstreet [Tue, 12 Apr 2022 02:36:53 +0000 (22:36 -0400)]
bcachefs: Improve error logging in fsck.c

This adds error logging to a bunch of functions in fsck.c - in fsck,
reduntant error messages is probably better than not enough.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix inode_backpointer_exists()
Kent Overstreet [Tue, 12 Apr 2022 02:36:13 +0000 (22:36 -0400)]
bcachefs: Fix inode_backpointer_exists()

If the dirent an inode points to doesn't exist, we shouldn't be
returning an error - just 0/false.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve bch2_lru_delete() error messages
Kent Overstreet [Tue, 12 Apr 2022 00:57:01 +0000 (20:57 -0400)]
bcachefs: Improve bch2_lru_delete() error messages

When we detect a filesystem inconsistency, we should include the
relevent keys in the error message. This patch adds a parameter to pass
the key with the lru entry to bch2_lru_delete(), so that it can be
printed.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Introduce bch2_journal_keys_peek_(upto|slot)()
Kent Overstreet [Tue, 12 Apr 2022 00:28:13 +0000 (20:28 -0400)]
bcachefs: Introduce bch2_journal_keys_peek_(upto|slot)()

When many journal replay keys have been overwritten,
bch2_journal_keys_peek() was taking excessively long to scan before it
found a key to return.

Fix this by introducing bch2_journal_keys_peek_upto() which takes a
parameter for the end of the range we want, so that we can terminate the
search much sooner, and replace all uses of bch2_journal_keys_peek()
with peek_upto() or peek_slot().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve error message when alloc key doesn't match lru entry
Kent Overstreet [Mon, 11 Apr 2022 21:23:39 +0000 (17:23 -0400)]
bcachefs: Improve error message when alloc key doesn't match lru entry

Error messages should always print out the full key when available -
this gives us a starting point when looking through the journal to debug
what went wrong.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Ensure buckets have io_time[READ] set
Kent Overstreet [Sun, 10 Apr 2022 23:59:26 +0000 (19:59 -0400)]
bcachefs: Ensure buckets have io_time[READ] set

It's an error if a bucket is in state BCH_DATA_cached but not on the LRU
btree - i.e io_time[READ] == 0 - so, make sure it's set before adding
it.

Also, make some of the LRU code a bit clearer and more direct.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Use bch2_trans_inconsistent_on() in more places
Kent Overstreet [Sun, 10 Apr 2022 22:12:04 +0000 (18:12 -0400)]
bcachefs: Use bch2_trans_inconsistent_on() in more places

This gets us better error messages.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Improve bch2_open_buckets_to_text()
Kent Overstreet [Sun, 10 Apr 2022 22:04:24 +0000 (18:04 -0400)]
bcachefs: Improve bch2_open_buckets_to_text()

This patch updates bch2_open_buckets_to_text() to include the device and
bucket the open_bucket owns.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix CPU usage in journal read path
Kent Overstreet [Sun, 10 Apr 2022 20:26:34 +0000 (16:26 -0400)]
bcachefs: Fix CPU usage in journal read path

In journal_entry_add(), we were repeatedly scanning the journal entries
radix tree to scan for old entries that can be freed, with O(n^2)
behaviour. This patch tweaks things to remember the previous last_seq,
so we don't have to scan for entries to free from the start.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix a null ptr deref
Kent Overstreet [Sun, 10 Apr 2022 18:36:10 +0000 (14:36 -0400)]
bcachefs: Fix a null ptr deref

We start doing allocations before the GC thread is created, which means
we need to check for that to avoid a null ptr deref.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Don't trigger extra assertions in journal replay
Kent Overstreet [Sun, 10 Apr 2022 04:48:36 +0000 (00:48 -0400)]
bcachefs: Don't trigger extra assertions in journal replay

We now pass a rw argument to .key_invalid methods so they can trigger
assertions for updates but not on existing keys. We shouldn't trigger
these extra assertions in journal replay - this patch changes the
transaction commit path accordingly.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Minor device removal fixes
Kent Overstreet [Sat, 9 Apr 2022 19:15:36 +0000 (15:15 -0400)]
bcachefs: Minor device removal fixes

 - We weren't clearing the LRU btree
 - bch2_alloc_read() runs before bch2_check_alloc_key() deletes alloc
   keys for devices/buckets that don't exists, so it needs to check for
   that
 - bch2_check_lrus() needs to check that buckets exists
 - improve some error messages

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Fix a few warnings on 32 bit
Kent Overstreet [Sun, 10 Apr 2022 00:29:26 +0000 (20:29 -0400)]
bcachefs: Fix a few warnings on 32 bit

These showed up when building for mips.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: bch2_btree_delete_extent_at()
Kent Overstreet [Sat, 9 Apr 2022 19:07:11 +0000 (15:07 -0400)]
bcachefs: bch2_btree_delete_extent_at()

New helper, for deleting extents.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
11 months agobcachefs: Don't skip triggers in fcollapse()
Kent Overstreet [Sat, 9 Apr 2022 03:54:14 +0000 (23:54 -0400)]
bcachefs: Don't skip triggers in fcollapse()

With backpointers this doesn't work anymore - backpointers always need
to be updated to point to the new extent position.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>