linux.git/fs/bcachefs/backpointers.h, branch v6.17 Linux kernel source tree bcachefs: bch_err_throw() 2025-06-02T16:16:35+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-28T15:57:50+00:00 09b9c72bd4b77a954123997377665fb30f1d07e1 Add a tracepoint for any time we return an error and unwind. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Add a tracepoint for any time we return an error and unwind.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Replace rcu_read_lock() with guards 2025-06-01T04:03:12+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-24T20:33:39+00:00 18dad454cd16cbb4c219dbd19a0008af52eb294a The new guard(), scoped_guard() allow for more natural code. Some of the uses with creative flow control have been left. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
The new guard(), scoped_guard() allow for more natural code.

Some of the uses with creative flow control have been left.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: bch2_check_bucket_backpointer_mismatch() 2025-05-22T00:15:04+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-09T21:01:05+00:00 39cea302f13a0a9dc4cf39248529a42e79d06842 Detect buckets with missing backpointers, and run repair on demand. __bch2_move_data_phys() now calls bch2_check_bucket_backpointer_mismatch() as it walks buckets, which checks for missing backpointers by comparing backpointers against bucket sector counts. When missing backpointers are detected, we kick off bch2_check_extents_to_backpointers() asynchronously - right away if we're trying to evacuate, or with a threshold if we're just running copygc. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Detect buckets with missing backpointers, and run repair on demand.

__bch2_move_data_phys() now calls
bch2_check_bucket_backpointer_mismatch() as it walks buckets, which
checks for missing backpointers by comparing backpointers against bucket
sector counts.

When missing backpointers are detected, we kick off
bch2_check_extents_to_backpointers() asynchronously - right away if
we're trying to evacuate, or with a threshold if we're just running
copygc.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Improve bucket_bitmap code 2025-05-22T00:15:04+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-17T19:05:26+00:00 15f969326ee296f7b7faf7704105a99fa02c288d Add some more helpers, and mismatches is now a superset of the empty bitmap - simplifies most checks. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Add some more helpers, and mismatches is now a superset of the empty
bitmap - simplifies most checks.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Debug params are now static_keys 2025-05-22T00:14:54+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-10T18:14:06+00:00 284251557562f6e8f0ce439cb52a6b9645b4e9a4 We'd like users to be able to debug without building custom kernels, so this will help us get rid of CONFIG_BCACHEFS_DEBUG, at least for most things. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
We'd like users to be able to debug without building custom kernels, so
this will help us get rid of CONFIG_BCACHEFS_DEBUG, at least for most
things.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: "buckets with backpointer mismatches" now allocated on demand 2025-05-22T00:14:52+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-05-09T20:25:21+00:00 13ffcbae86dadbf7711f42e4940bafae88a87e1f More self healing work: we're going to be calling check_bucket_backpointer_mismatch() at runtime, outside of fsck. Then when we need to we'll kick off the full check_extents_to_backpointers recovery pass. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
More self healing work: we're going to be calling
check_bucket_backpointer_mismatch() at runtime, outside of fsck.

Then when we need to we'll kick off the full
check_extents_to_backpointers recovery pass.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: bcachefs_metadata_version_stripe_backpointers 2025-03-15T01:02:15+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-02-07T06:34:00+00:00 88d961b518826e5e98e171d876b87b642f12de6a Stripes now have backpointers. This is needed for proper scrub - stripe checksums need to be verified, separately from extents within the stripe, since a block may not be full of live extents but it's still needed for reconstruct. And this will be needed for (efficient) evacuate/repair paths. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Stripes now have backpointers.

This is needed for proper scrub - stripe checksums need to be verified,
separately from extents within the stripe, since a block may not be full
of live extents but it's still needed for reconstruct.

And this will be needed for (efficient) evacuate/repair paths.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: bch2_bkey_ptr_data_type() now correctly returns cached for cached ptrs 2025-03-15T01:02:13+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-02-07T21:58:34+00:00 34a493089af2f2f773c0c802e84b0a493115cd50 Necessary for adding backpointers for cached pointers. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Necessary for adding backpointers for cached pointers.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Factor out progress.[ch] 2025-03-15T01:02:12+00:00 Kent Overstreet kent.overstreet@linux.dev 2025-02-06T20:59:28+00:00 baabeb499758706a9093c610c5d97cf6de5f649a the backpointers code has progress indicators; these aren't great, since they print to the dmesg console and we much prefer to have progress indicators reporting to a specific userspace program so they're not spamming the system console. But not all codepaths that need progress indicators support that yet, and we don't want users to think "this is hung". Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
the backpointers code has progress indicators; these aren't great, since
they print to the dmesg console and we much prefer to have progress
indicators reporting to a specific userspace program so they're not
spamming the system console.

But not all codepaths that need progress indicators support that yet,
and we don't want users to think "this is hung".

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Add write buffer flush param to backpointer_get_key() 2024-12-29T18:30:39+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-11-15T03:13:29+00:00 056cae1c00b9773aa69791f4703262f690c28cdb In an upcoming patch bch2_backpointer_get_key() will be repairing when it finds a dangling backpointer; it will need to flush the btree write buffer before it can definitively say there's an error. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
In an upcoming patch bch2_backpointer_get_key() will be repairing when
it finds a dangling backpointer; it will need to flush the btree write
buffer before it can definitively say there's an error.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>