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path: root/fs/bcachefs/btree_iter.c
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2024-01-21bcachefs: Improve trace_trans_restart_relockKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-05bcachefs: Add an option to control btree node prefetchingKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-05bcachefs: track transaction durationsKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-05bcachefs: btree_trans always has statsKent Overstreet
reserve slot 0 for unknown (when we overflow), to avoid some branches Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_trans_peek_slot_updatesKent Overstreet
refactoring the BTREE_ITER_WITH_UPDATES code, prep for removing the flag and making it always-on Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_trans_peek_prev_updatesKent Overstreet
bch2_btree_iter_peek_prev() now supports BTREE_ITER_WITH_UPDATES Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_trans_peek_updatesKent Overstreet
refactoring the BTREE_ITER_WITH_UPDATES code, prep for removing the flag and making it always-on Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: growable btree_pathsKent Overstreet
XXX: we're allocating memory with btree locks held - bad We need to plumb through an error path so we can do allocate_dropping_locks() - but we're merging this now because it fixes a transaction path overflow caused by indirect extent fragmentation, and the resize path is rare. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: trans->nr_pathsKent Overstreet
Start to plumb through dynamically growable btree_paths; this patch replaces most BTREE_ITER_MAX references with trans->nr_paths. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: trans->updates will also be resizableKent Overstreet
the reflink triggers are also bumping up against the maximum number of paths in a transaction - and generating proportional numbers of updates. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: optimize __bch2_trans_get(), kill DEBUG_TRANSACTIONSKent Overstreet
- Some tweaks to greatly reduce locking overhead for the list of btree transactions, so that it can always be enabled: leave btree_trans objects on the list when they're on the percpu single item freelist, and only check for duplicates in the same process when CONFIG_BCACHEFS_DEBUG is enabled - don't zero out the full btree_trans() unless we allocated it from the mempool Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: rcu protect trans->pathsKent Overstreet
Upcoming patches are going to be changing trans->paths to a reallocatable buffer. We need to guard against use after free when it's used by other threads; this introduces RCU protection to those paths and changes them to check for trans->paths == NULL Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Clean up btree_transKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: kill btree_path.idxKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_iter_peek_prev() no longer uses path->idxKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_path_get() no longer uses path->idxKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: trans_for_each_path_with_node() no longer uses path->idxKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: trans_for_each_path() no longer uses path->idxKent Overstreet
path->idx is now a code smell: we should be using path_idx_t, since it's stable across btree path reallocation. This is also a bit faster, using the same loop counter vs. fetching path->idx from each path we iterate over. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_path_to_text() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: struct trans_for_each_path_inorder_iterKent Overstreet
reducing our usage of path->idx Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: btree_insert_entry -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: btree_iter -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: btree_path_alloc() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_path_traverse() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_path_make_mut() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_btree_path_set_pos() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs; bch2_path_put() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_path_get() -> btree_path_idx_tKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: minor bch2_btree_path_set_pos() optimizationKent Overstreet
bpos_eq() is cheaper than bpos_cmp() Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: kill __bch2_btree_iter_peek_upto_and_restart()Kent Overstreet
dead code Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_trans_srcu_lock() should be staticKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: trans_for_each_update() now declares loop iterKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: fix userspace build errorsKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: kill btree_trans->wb_updatesKent Overstreet
the btree write buffer path now creates a journal entry directly Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: bch2_trans_node_add no longer uses trans_for_each_path()Kent Overstreet
In the future we'll be making trans->paths resizable and potentially having _many_ more paths (for fsck); we need to start fixing algorithms that walk each path in a transaction where possible. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Improve trans->extra_journal_entriesKent Overstreet
Instead of using a darray, we now allocate journal entries for the transaction commit path with our normal bump allocator - with an inlined fastpath, and using btree_transaction_stats to remember how much to initially allocate so as to avoid transaction restarts. This is prep work for converting write buffer updates to use this mechanism. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: kill btree_path->(alloc_seq|downgrade_seq)Kent Overstreet
These were for extra info in tracepoints for debugging a specialized issue - we do not want to bloat btree_path for this, at least in release builds. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: reserve path idx 0 for sentinalKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Refactor trans->paths_allocated to be standard bitmapKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Include btree_trans in more tracepointsKent Overstreet
This gives us more context information - e.g. which codepath is invoking btree node reads. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Improve trace_trans_restart_would_deadlockKent Overstreet
In the CI, we're seeing tests failing due to excessive would_deadlock transaction restarts - the tracepoint now includes the lock cycle that occured. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Improve trace_trans_restart_too_many_iters()Kent Overstreet
We now include the list of paths in use. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: convert bch_fs_flags to x-macroKent Overstreet
Now we can print out filesystem flags in sysfs, useful for debugging various "what's my filesystem doing" issues. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Kill btree_iter->journal_posKent Overstreet
For BTREE_ITER_WITH_JOURNAL, we memoize lookups in the journal keys, to avoid the binary search overhead. Previously we stashed the pos of the last key returned from the journal, in order to force the lookup to be redone when rewinding. Now bch2_journal_keys_peek_upto() handles rewinding itself when necessary - so we can slim down btree_iter. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Kill BTREE_ITER_ALL_LEVELSKent Overstreet
As discussed in the previous patch, BTREE_ITER_ALL_LEVELS appears to be racy with concurrent interior node updates - and perhaps it is fixable, but it's tricky and unnecessary. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Fix redundant variable initializationKent Overstreet
path->level was being read, but never used. Reported-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01bcachefs: Fix extents iteration + snapshots interactionKent Overstreet
peek_upto() checks against the end position and bails out before FILTER_SNAPSHOTS checks; this is because if we end up at a different inode number than the original search key none of the keys we see might be visibile in the current snapshot - we might be looking at inode in a completely different subvolume. But this is broken, because when we're iterating over extents we're checking against the extent start position to decide when to bail out, and the extent start position isn't monotonically increasing until after we've run FILTER_SNAPSHOTS. Fix this by adding a simple inode number check where the old bailout check was, and moving the main check to the correct position. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Reported-by: "Carl E. Thompson" <list-bcachefs@carlthompson.net>
2023-12-14bcachefs: fix invalid memory access in bch2_fs_alloc() error pathThomas Bertschinger
When bch2_fs_alloc() gets an error before calling bch2_fs_btree_iter_init(), bch2_fs_btree_iter_exit() makes an invalid memory access because btree_trans_list is uninitialized. Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com> Fixes: 6bd68ec266ad ("bcachefs: Heap allocate btree_trans") Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-11-24bcachefs: Proper refcounting for journal_keysKent Overstreet
The btree iterator code overlays keys from the journal until journal replay is finished; since we're now starting copygc/rebalance etc. before replay is finished, this is multithreaded access and thus needs refcounting. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-11-14bcachefs: Kill journal pre-reservationsKent Overstreet
This deletes the complicated and somewhat expensive journal pre-reservation machinery in favor of just using journal watermarks: when the journal is more than half full, we run journal reclaim more aggressively, and when the journal is more than 3/4s full we only allow journal reclaim to get new journal reservations. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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