Kent Overstreet [Tue, 13 Dec 2022 20:17:40 +0000 (15:17 -0500)]
bcachefs: Convert EAGAIN errors to private error codes
More error code cleanup, for better error messages and debugability.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 12 Dec 2022 01:37:11 +0000 (20:37 -0500)]
bcachefs: Convert EROFS errors to private error codes
More error code improvements - this gets us more useful error messages.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 3 Dec 2022 20:44:54 +0000 (15:44 -0500)]
bcachefs: Fix compat path for old inode formats
Old inode formats don't have all the fields of the current inode format:
when unpacking inodes in the current format we can thus skip zeroing out
the destination buffer, but that doesn't work on for the old formats.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 24 Jan 2023 05:26:48 +0000 (00:26 -0500)]
bcachefs: bch2_trans_relock_notrace()
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 9 Jan 2023 06:11:18 +0000 (01:11 -0500)]
bcachefs: btree_iter->ip_allocated
In debug mode, we now track where btree iterators and paths are
initialized/allocated - helpful in tracking down btree path overflows.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 7 Jan 2023 10:46:52 +0000 (05:46 -0500)]
bcachefs: key cache: Don't hold btree locks while using GFP_RECLAIM
This is something we need to do more widely: instead of bothering with
GFP_NOIO/GFP_NOFS, if we need to allocate memory while holding locks:
- first attempt the allocation with GFP_NOWAIT
- if that fails, drop btree locks with bch2_trans_unlock(), then
retry with GFP_KERNEL.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 8 Jan 2023 05:05:30 +0000 (00:05 -0500)]
bcachefs: Improve bkey_cached_lock_for_evict()
We don't need a write lock to check if a key is dirty.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 8 Jan 2023 05:04:30 +0000 (00:04 -0500)]
bcachefs: Fix bch2_btree_path_traverse_all()
We need to take a ref on a path while we're traversing it: this fixes a
bug with paths getting reused while being traversed, in the key cache
fill code.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 7 Jan 2023 03:58:19 +0000 (22:58 -0500)]
bcachefs: Delete a faulty assertion
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 6 Jan 2023 11:29:04 +0000 (06:29 -0500)]
bcachefs: Kill bch2_extent_trim_atomic() usage
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 3 Jan 2023 22:32:16 +0000 (17:32 -0500)]
bcachefs: Plumb saw_error through to btree_err()
The btree node read path has the ability to kick off an asynchronous
btree node rewrite if we saw and corrected an error. Previously this was
only used for errors that caused one of the replicas to be unusable -
this patch plumbs it through to all error paths, so that normal fsck
errors can be corrected.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 3 Jan 2023 22:14:07 +0000 (17:14 -0500)]
bcachefs: Convert btree_err() to a function
This makes the code more readable, and reduces text size by 8 kb.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 25 Dec 2022 20:31:27 +0000 (15:31 -0500)]
bcachefs: fix fsck error
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 21 Dec 2022 00:27:02 +0000 (19:27 -0500)]
bcachefs: Make log message at startup a bit cleaner
Don't print out opts= if no options have been specified.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 14 Dec 2022 15:39:04 +0000 (10:39 -0500)]
bcachefs: Log more messages in the journal
This patch
- Adds a mechanism for queuing up journal entries prior to the journal
being started, which will be used for early journal log messages
- Adds bch2_fs_log_msg() and improves bch2_trans_log_msg(), which now
take format strings. bch2_fs_log_msg() can be used before or after
the journal has been started, and will use the appropriate mechanism.
- Deletes the now obsolete bch2_journal_log_msg()
- And adds more log messages to the recovery path - messages for
journal/filesystem started, journal entries being blacklisted, and
journal replay starting/finishing.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 5 Jan 2023 02:34:41 +0000 (21:34 -0500)]
bcachefs: bch2_btree_trans_to_text(): print blocked time
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 28 Dec 2022 20:17:07 +0000 (15:17 -0500)]
bcachefs: Fix some memcpy() warnings
With CONFIG_FORTIFY_SOURCE, the compiler attempts to warn about mempcys
that extend past struct field boundaries. This results in some spurious
warnings where we use embedded variable length structs, this patch
switches to unsafe_mecpy() to fix the warnings.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 21 Dec 2022 00:43:41 +0000 (19:43 -0500)]
bcachefs: Be less restrictive when validating journal overwrite entries
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 7 Mar 2022 06:35:55 +0000 (01:35 -0500)]
bcachefs: Fix bch2_journal_flush_device_pins()
It's now legal for the pin fifo to be empty, which means this code needs
to be updated in order to not hit an assert.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Kent Overstreet [Fri, 16 Dec 2022 02:44:32 +0000 (21:44 -0500)]
bcachefs: Fix for long running btree transactions & key cache
While a btree transaction is running, we hold a SRCU read lock on the
btree key cache that prevents btree key cache keys from being freed -
this is so that relock() operations won't access freed memory.
The downside of this is that long running btree transactions prevent
memory from being freed from the key cache. This adds a check in
bch2_trans_begin() - if the transaction has been running longer than 1
second, drop and retake the SRCU read lock and zero out pointers to
unlock key cache paths.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 23 Dec 2022 01:51:02 +0000 (20:51 -0500)]
bcachefs: Add a missing bch2_err_str() call
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 24 Nov 2022 01:11:46 +0000 (20:11 -0500)]
bcachefs: Add some unlikely() annotations
Add a few easy unlikely() optimizations. These are mainly worthwhile
because the compiler will (usually) put the branch-not-taken path at the
end of the function, meaning better icache utilization.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 24 Nov 2022 03:13:19 +0000 (22:13 -0500)]
bcachefs: New btree helpers
This introduces some new conveniences, to help cut down on boilerplate:
- bch2_trans_kmalloc_nomemzero() - performance optimiation
- bch2_bkey_make_mut()
- bch2_bkey_get_mut()
- bch2_bkey_get_mut_typed()
- bch2_bkey_alloc()
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 3 Dec 2022 01:36:06 +0000 (20:36 -0500)]
bcachefs: Allow for more btrees
Expand some bitfields so we can keep adding more btrees.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 14 Dec 2022 19:47:42 +0000 (14:47 -0500)]
bcachefs: Recover from blacklisted journal entries
If it so happens that we crash while dirty, meaning we don't have the
superblock clean section, and we erroneously mark a journal entry we
wrote as blacklisted, we won't be able to recover.
This patch fixes this by adding a fallback: if we've got no superblock
clean section, and no non-ignored journal entries, we try the most
recent ignored journal entry.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 13 Dec 2022 19:43:03 +0000 (14:43 -0500)]
bcachefs: Fix btree_gc when multiple passes required
We weren't resetting filesystem & device usage when restarting gc, which
was spotted when free bucket counters overflowed - whoops.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 13 Dec 2022 23:19:30 +0000 (18:19 -0500)]
bcachefs: Fix error path in bch2_trans_commit_write_locked()
Previously, we were journalling extra_journal_entries (which is used for
new btree roots, and irreversably mutates system state) before calling
bch2_trans_fs_usage_apply(), which can fail - whoops.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 23:46:03 +0000 (18:46 -0500)]
bcachefs: bch2_trans_revalidate_updates_in_node()
When we started stashing the key being overwritten in
btree_insert_entry, this introduced a typical iterator invalidation
problem, triggered by btree node splits or resorts.
Previously, dealt with this by unconditionally re-validating those
stashed pointers in the transaction commit path. This patch gets rid of
that by doing it only when needed, in bch2_trans_node_add() or
bch2_trans_node_reinit_iter().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 20:01:36 +0000 (15:01 -0500)]
bcachefs: bkey_min(), bkey_max()
Parallel to bpos_min(), bpos_max() - trivial refactoring.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 20 Nov 2022 03:39:08 +0000 (22:39 -0500)]
bcachefs: More errcode cleanup
We shouldn't be overloading standard error codes now that we have
provisions for bcachefs-specific errorcodes: this patch converts super.c
and super-io.c to per error site errcodes, with a bit of cleanup.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 12 Oct 2022 20:11:31 +0000 (16:11 -0400)]
bcachefs: Suppress -EROFS messages when shutting down
This isn't actually an error condition, this just indicates a normal
shutdown - no reason for these to be in the log.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 9 Dec 2022 21:22:36 +0000 (16:22 -0500)]
bcachefs: Add a missing bch2_btree_path_traverse() call
bch2_btree_iter_peek_upto() in snapshots mode may need to keep a
btree_path for the insert position, not just the position of the key
we're returning. The code was incorrectly assuming this would be in the
same btree node - we were missing a bch2_btree_path_traverse() call.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 9 Dec 2022 19:09:14 +0000 (14:09 -0500)]
bcachefs: Fix bch2_journal_keys_peek_upto()
bch2_journal_keys_peek_upto() was comparing against btree_id & level
incorrectly - fix this by using __journal_key_cmp().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 7 Dec 2022 16:39:34 +0000 (11:39 -0500)]
bcachefs: Kill btree_insert_ret enum
Replace with standard bcachefs-private error codes.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 2 Dec 2022 17:45:37 +0000 (12:45 -0500)]
bcachefs: Fix a btree iter assertion pop
This fixes a (harmless) broken invariant in __bch2_btree_path_set_pos():
iterators to interior nodes should point to the first non whiteout.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 2 Dec 2022 02:59:25 +0000 (21:59 -0500)]
bcachefs: Simplify journal read path
This just cleans up and simplifies the code that decides where to resume
writing in the journal - when the code was originally written we weren't
saving the precise location of every journal write found.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 2 Dec 2022 16:45:58 +0000 (11:45 -0500)]
bcachefs: Fix a "no journal entries found" bug
On startup, we need to ensure the first journal entry written is a flush
write: after a clean shutdown we generally don't read the journal, which
means we might be overwriting whatever was there previously, and there
must always be at least one flush entry in the journal or recovery will
fail.
Found by fstests generic/388.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 1 Dec 2022 16:17:18 +0000 (11:17 -0500)]
bcachefs: Don't error out when just reading the journal
This tweaks the recovery and journal paths so that we don't error out
before we need to: the list_journal command should work, even if we
wouldn't be able to replay successfully.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 25 Jan 2023 15:15:39 +0000 (10:15 -0500)]
bcachefs: Fix a livelock in key cache fill path
We weren't setting path->uptodate before calling
bch2_btree_key_cache_fill() - which causes __bch2_btree_path_upgrade()
to fail.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 01:15:33 +0000 (20:15 -0500)]
bcachefs: Key cache now works for snapshots btrees
This switches btree_key_cache_fill() to use a btree iterator, not a
btree path, so that it can search for keys in previous snapshots.
We also add another iterator flag, BTREE_ITER_KEY_CACHE_FILL, to avoid
recursion back into the key cache.
This will allow us to re-enable the key cache for inodes in the next
patch.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 20 Dec 2022 16:26:57 +0000 (11:26 -0500)]
bcachefs: Bring back BTREE_ITER_CACHED_NOFILL
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 20 Dec 2022 21:02:09 +0000 (16:02 -0500)]
bcachefs: Kill __btree_trans_peek_key_cache()
There was no reason for this to be a separate helper - we always want
the relock call that btree_trans_peek_key_cache() did.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 20 Dec 2022 16:13:19 +0000 (11:13 -0500)]
bcachefs: bch2_btree_path_peek_slot_exact()
When we start using the key cache for inodes again, it'll be possible
for bch2_btree_path_peek_slot() to return a key in a different snapshot
with a key cache path.
This isn't what we want when triggers are checking what they're
overwriting, so introduce a new helper for the commit path.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 20 Dec 2022 15:51:20 +0000 (10:51 -0500)]
bcachefs: Fix __btree_trans_peek_key_cache()
We were returning a pointer to a variable on the stack - oops.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 24 Nov 2022 08:12:22 +0000 (03:12 -0500)]
bcachefs: New bpos_cmp(), bkey_cmp() replacements
This patch introduces
- bpos_eq()
- bpos_lt()
- bpos_le()
- bpos_gt()
- bpos_ge()
and equivalent replacements for bkey_cmp().
Looking at the generated assembly these could probably be improved
further, but we already see a significant code size improvement with
this patch.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 3 Dec 2022 00:46:49 +0000 (19:46 -0500)]
bcachefs: New magic number
Add a new bcachefs-specific magic number for the superblock, instead of
continuing to use the old bcache magic number3
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 26 Nov 2022 09:36:56 +0000 (04:36 -0500)]
bcachefs: extents no longer require special handling for packing
Extent overwrite used to be handled differently, underneath the
journaling layer and within the core btree code. This imposed
restrictions on bkey packing/packed formats, which no longer apply.
This patch deletes those restrictions.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 23:29:36 +0000 (18:29 -0500)]
bcachefs: Fix BCH_IOCTL_DISK_SET_STATE
- Ensure we print an error message if necessary.
Ideally we'd return the precise error code to userspace and leave
printing the error message to the userspace tool, but we haven't
decided to make our private error codes ABI-stable yet.
- Return standard error code to userspace
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 21:04:42 +0000 (16:04 -0500)]
bcachefs: Don't set accessed bit on btree node fill
Btree nodes shouldn't have their accessed bit set when entering the
btree cache by being read in from disk - this fixes linear scans
thrashing the cache.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 21:15:14 +0000 (16:15 -0500)]
bcachefs: Fix an include
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 17:56:49 +0000 (12:56 -0500)]
bcachefs: Kill BCH_FEATURE_incompressible
This isn't needed anymore, we only support metadata versions that have
this.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 23:23:48 +0000 (18:23 -0500)]
bcachefs: Better inlining in bch2_time_stats_update()
Move the actual slowpath off into a new function -
bch2_time_stats_clear_buffer() - and inline
bch2_time_stats_update_one().
Alo, use the new inlined update functions from mean_and_variance.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 05:40:27 +0000 (00:40 -0500)]
bcachefs: Optimize bch2_trans_iter_init()
When flags & btree_id are constants, we can constant fold the entire
calculation of the actual iterator flags - and the whole thing becomes
small enough to inline.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 25 Nov 2022 04:52:28 +0000 (23:52 -0500)]
bcachefs: More dio inlining
Eliminate another function call in the O_DIRECT write path.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 23:51:27 +0000 (18:51 -0500)]
bcachefs: Kill some unneeded references to c->flags
This drops some unneeded references to JOURNAL_REPLAY_DONE in c->flags:
we're already mirroring it in btree_trans, we just weren't using it
consistently.
We may want to do this with more flags:
btree_iter.c: unsigned nr = test_bit(BCH_FS_STARTED, &c->flags)
btree_update_leaf.c: if (unlikely(!test_bit(BCH_FS_MAY_GO_RW, &c->flags))) {
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 24 Nov 2022 01:28:15 +0000 (20:28 -0500)]
bcachefs: Improve bch2_inode_opts_to_opts()
It turns out the *_defined entries of bch_io_opts are only used in one
place - in the xattr get path - and there we immediately convert to a
bch_opts struct, which also has the *_defined entries.
This patch changes bch2_inode_opts_to_opts() to go directly from
bch_inode_unpacked to bch_opts, which is a minor simplification and will
also let us slim down struct bch_io_opts in another patch.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 23:22:59 +0000 (18:22 -0500)]
bcachefs: Better inlining in bch2_subvolume_get_snapshot()
This provides an inlined version of bch2_subvolume_get() and uses it in
bch2_subvolume_get_snapshot(), since this is the version that's used all
over the place and in fast paths (e.g. IO paths).
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 24 Nov 2022 08:38:31 +0000 (03:38 -0500)]
bcachefs: Inline bch2_bkey_format_add_key()
This is only called in two places, and when it's used we use it in a
tight loop - it's definitely worth inlining.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 04:47:22 +0000 (23:47 -0500)]
bcachefs: Tiny bch2_trans_update_by_path_trace() optimization
This just removes a redundant comparison - there's more work we could do
here to remove some redundant copying.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 03:06:04 +0000 (22:06 -0500)]
bcachefs: Move some asserts behind CONFIG_BCACHEFS_DEBUG
Convert some non-critical asserts in long-stable code to debug asserts.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 23 Nov 2022 03:05:45 +0000 (22:05 -0500)]
bcachefs: Split out __bch2_btree_node_get()
Standard splitting out of the slow path from the fast path of a
function. We may follow this up in another patch with inlining the fast
path into btree_iter.c.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 20 Nov 2022 02:40:35 +0000 (21:40 -0500)]
bcachefs: Handle last journal write being torn
If the last journal write didn't complete sucessfully due to a torn
write, we'll detect it as a checksum error. In that case, we should just
pretend that journal entry was never written.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 20 Nov 2022 02:20:58 +0000 (21:20 -0500)]
bcachefs: Improve journal_read() logging
Print out the journal entries we read and will replay as soon as
possible - if we get an error walidating keys it's helpful to know where
it was in the journal.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 18 Nov 2022 00:07:40 +0000 (19:07 -0500)]
bcachefs: Fix a transaction path overflow
It turns out we need bch2_extent_trim_atomi() even when we're deleting
extents one at a time because it's possible for one reflink_p to
reference arbitrarily many reflink_v extents. This doesn't normally
happen, but the data move path can fragment existing extents in the
background.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 17 Nov 2022 21:03:15 +0000 (16:03 -0500)]
bcachefs: Fix a race with b->write_type
b->write_type needs to be set atomically with setting the
btree_node_need_write flag, so move it into b->flags.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 16 Nov 2022 01:25:08 +0000 (20:25 -0500)]
bcachefs: Error message improvement
- Centralize format strings in bcachefs.h
- Add bch2_fmt_inum_offset() and related helpers
- Switch error messages for inodes to also print out the offset, in
bytes
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 15 Nov 2022 20:57:07 +0000 (15:57 -0500)]
bcachefs: Improve a few warnings
Warnings ought to always have a format string/log message - makes them
considerably more useful.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 16 Nov 2022 04:17:55 +0000 (23:17 -0500)]
bcachefs: Fix for_each_btree_key2()
Previously, when we exited from the loop body with a break statement
_ret wouldn't have been assigned to yet, and we could spuriously return
a transaction restart error.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 16 Nov 2022 02:52:12 +0000 (21:52 -0500)]
bcachefs: Btree split improvement
This improves the bkey_format calculation when splitting btree nodes.
Previously, we'd use a format calculated for the original node for the
lower of the two new nodes.
This was particularly bad on sequential insertions, where we iteratively
split the last btree node, whos format has to include KEY_MAX.
Now, we calculate formats precisely for the keys the two new nodes will
contain. This also should make splitting a bit more efficient, since
we're only copying keys once (from the original node to the new node,
instead of new node, replacement node, then upper split).
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 16 Nov 2022 03:48:03 +0000 (22:48 -0500)]
bcachefs: Fix return code from btree_path_traverse_one()
trans->restarted is a positive error code, not the usual negative
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 14 Nov 2022 03:43:37 +0000 (22:43 -0500)]
bcachefs: Minor dio write path improvements
This switches where we take quota reservations to be per bch_wirte_op
instead of per dio_write, so we can drop the quota reservation in the
same place as we call i_sectors_acct(), and only take/release
ei_quota_lock once.
In the future we'd like ei_quota_lock to not be a mutex, so that we can
avoid punting to process context before deliving write completions in
nocow mode.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 14 Nov 2022 03:35:55 +0000 (22:35 -0500)]
bcachefs: Quota: Don't allocate memory under lock
The genradix code can handle multiple threads trying to allocate at the
same time - we don't need the genradix_ptr_alloc() call to happen under
a lock.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 14 Nov 2022 07:22:30 +0000 (02:22 -0500)]
bcachefs: Fix a use after free
This fixes a regression from percpu freedlists in the btree key cache
code: in a rare error path, we were immediately freeing a bkey_cached
that had been used before and should've waited for an SRCU barrier.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 14 Nov 2022 01:53:24 +0000 (20:53 -0500)]
bcachefs: Delete atomic_inc_bug()
These were wrappers around atomic operations that verified that the
counter wasn't negative, but they're dead code - delete.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 14 Nov 2022 01:01:42 +0000 (20:01 -0500)]
bcachefs: Fixes for building in userspace
- Marking a non-static function as inline doesn't actually work and is
now causing problems - drop that
- Introduce BCACHEFS_LOG_PREFIX for when we want to prefix log messages
with bcachefs (filesystem name)
- Userspace doesn't have real percpu variables (maybe we can get this
fixed someday), put an #ifdef around bch2_disk_reservation_add()
fastpath
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 4 Nov 2022 17:25:57 +0000 (13:25 -0400)]
bcachefs: Factor out two_state_shared_lock
We have a unique lock used for controlling adding to the pagecache: the
lock has two states, where both states are shared - the lock may be held
multiple times for either state - but not both states at the same time.
This is exactly what we need for nocow mode locking, so this patch pulls
it out of fs.c into its own file.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 3 Nov 2022 04:29:43 +0000 (00:29 -0400)]
bcachefs: Kill BCH_WRITE_FLUSH
BCH_WRITE_FLUSH is a write flag that causes a journal flush. It's only
used in the direct IO path, and this will allow for some consolidation
with the regular fsync path, which will help with the upcoming nocow
mode.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Thu, 3 Nov 2022 15:14:04 +0000 (11:14 -0400)]
bcachefs: bch2_trans_commit_bkey_invalid()
- factor out more slowpath code into non-inline function
- use bch2_print_string_as_lines(), so our error message doesn't get
truncated
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 2 Nov 2022 19:41:32 +0000 (15:41 -0400)]
bcachefs: Kill bch2_alloc_sectors_start()
Only used in one place, just inline it there.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 1 Nov 2022 08:23:24 +0000 (04:23 -0400)]
bcachefs: Improve __bch2_btree_path_make_mut()
btree_path_copy() doesn't need to call
bch2_btree_path_check_sort_fast() - the newly allocated path will always
be in the correct position, post copy; also delete some redundant
branches from __bch2_btree_path_make_mut().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 1 Nov 2022 07:37:53 +0000 (03:37 -0400)]
bcachefs: Inlining improvements
- Don't call into bch2_encrypt_bio() when we're not encrypting
- Pull slowpath out of trans_lock_write()
- Make sure bc2h_trans_journal_res_get() gets inlined.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Tue, 1 Nov 2022 00:30:27 +0000 (20:30 -0400)]
bcachefs: DIO write path optimization
- With BCH_WRITE_SYNC, we no longer need the completion in struct
dio_write
- Pull out bch2_dio_write_copy_iov() into a separate non-inline
function, it's code that doesn't run in the common case
- Copy mapping and inode pointers into dio_write, avoiding pointer
chasing at the start of bch2_dio_write_loop()
- kthread_use_mm() is not needed in the common case; move it into
bch2_dio_write_loop_async()
- factor out various helpers from bch2_dio_write_loop() and rework
control flow for better icache utilization
Other small optimizations:
- bch2_keylist_free() is only used in one place, at the end of the
bch2_write() path - drop the reinit
- in bch2_disk_reservation_put(), check if res->sectors is nonzero
before touching c->online_reserved, since that will likely be a cache
miss
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: More DIO write path optimization
Better code prefetching (?)
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 29 Oct 2022 19:54:17 +0000 (15:54 -0400)]
bcachefs: BCH_WRITE_SYNC
This adds a new flag for the write path, BCH_WRITE_SYNC, and switches
the O_DIRECT write path to use it when we're not running asynchronously.
It runs the btree update after the write in the original thread's
context instead of a kworker, cutting context switches in half.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 22 Oct 2022 19:59:53 +0000 (15:59 -0400)]
bcachefs: More style fixes
Fixes for various checkpatch errors.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 31 Oct 2022 02:21:11 +0000 (22:21 -0400)]
bcachefs: Kill BCH_WRITE_JOURNAL_SEQ_PTR
Dead code, delete.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 28 Oct 2022 22:56:31 +0000 (18:56 -0400)]
bcachefs: should_compact_all()
This factors out a properly-documented helper for deciding when we want
to sort a btree node with MAX_BSETS bsets down to a single bset.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 28 Oct 2022 21:08:41 +0000 (17:08 -0400)]
bcachefs: Improved btree write statistics
This replaces sysfs btree_avg_write_size with btree_write_stats, which
now breaks out statistics by the source of the btree write.
Btree writes that are too small are a source of inefficiency, and
excessive btree resort overhead - this will let us see what's causing
them.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 24 Oct 2022 17:34:17 +0000 (13:34 -0400)]
bcachefs: Improve fs_usage_apply_warn() message
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 24 Oct 2022 19:10:14 +0000 (15:10 -0400)]
bcachefs: Fix a spurious warning
Fixes fstests generic/648
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Mon, 24 Oct 2022 02:01:50 +0000 (22:01 -0400)]
bcachefs: Fix buffered write path for generic/275
Per fstests generic/275, on -ENOSPC we're supposed write until the
filesystem is full - i.e. do a partial write instead of failing the full
write.
This is a partial fix for the buffered write path: we'll still fail on a
page boundary.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sun, 23 Oct 2022 21:37:23 +0000 (17:37 -0400)]
bcachefs: Journal keys overlay fixes
- In the btree iterator code that overlays keys from the journal, we
were incorrectly specifying level=0 instead of the btree_path's
current level in a few places
- When we didn't do journal replay, we shouldn't free the journal keys:
this fixes cmd_list and cmd_dump, which run in norecovery mode
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 22 Oct 2022 20:19:27 +0000 (16:19 -0400)]
bcachefs: Fix an out-of-bounds shift
roundup_pow_of_two() is undefined for 0 - oops.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 22 Oct 2022 19:10:28 +0000 (15:10 -0400)]
bcachefs: Make error messages more uniform
Use __func__ in error messages that refer to function name, and do so
more uniformly - suggested by checkpatch.pl
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Sat, 22 Oct 2022 19:00:16 +0000 (15:00 -0400)]
bcachefs: Convert to __packed and __aligned
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 21 Oct 2022 23:20:09 +0000 (19:20 -0400)]
bcachefs: bch2_bkey_cmp_packed_inlined()
This adds an inlined version of bch2_bkey_cmp_packed(), and uses it in
bch2_sort_keys(), where it's part of the inner loop.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 21 Oct 2022 23:15:07 +0000 (19:15 -0400)]
bcachefs: Move bkey bkey_unpack_key() to bkey.h
Long ago, bkey_unpack_key() was added to bset.h instead of bkey.h
because bkey.h didn't include btree_types.h, which it needs for the
compiled unpack function.
This patch finally moves it to the proper location.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 21 Oct 2022 21:37:42 +0000 (17:37 -0400)]
bcachefs: Optimize __bch2_btree_node_iter_advance()
This replaces an expensive memmove() call with an open-coded version.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 21 Oct 2022 21:26:49 +0000 (17:26 -0400)]
bcachefs: Don't touch c->flags in bch2_trans_iter_init()
This moves the JOURNAL_REPLAY_DONE flag check from
bch2_trans_iter_init() to bch2_trans_init(), where we stash a copy in
btree_trans - gaining us a small performance improvement.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Wed, 19 Oct 2022 22:31:33 +0000 (18:31 -0400)]
bcachefs: Assorted checkpatch fixes
checkpatch.pl gives lots of warnings that we don't want - suggested
ignore list:
ASSIGN_IN_IF
UNSPECIFIED_INT - bcachefs coding style prefers single token type names
NEW_TYPEDEFS - typedefs are occasionally good
FUNCTION_ARGUMENTS - we prefer to look at functions in .c files
(hopefully with docbook documentation), not .h
file prototypes
MULTISTATEMENT_MACRO_USE_DO_WHILE
- we have _many_ x-macros and other macros where
we can't do this
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Kent Overstreet [Fri, 21 Oct 2022 18:01:19 +0000 (14:01 -0400)]
bcachefs: Optimize bch2_dev_usage_read()
- add bch2_dev_usage_read_fast(), which doesn't return by value -
bch_dev_usage is big enough that we don't want the silent memcpy
- tweak the allocation path to only call bch2_dev_usage_read() once per
bucket allocated
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>