Make the superblock error counters available in sysfs; the only other
way they can be seen is 'show-super', but we don't write the superblock
every time the error count gets incremented.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Show recovery pass status in sysfs - important now that we're running
them automatically in the background.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We weren't checking if the option changed for non-superblock options -
this led to rebalance not waking up when enabling the
"rebalance_enabled" option.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add 'opts.snapshot_deletion_enabled', enabled by default.
This may be turned off so that the new sysfs knob,
'internal/trigger_delete_dead_snapshots', may be used instead - this
will allow snapshot deletion to be profiled more easily.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Convert device IO refs to enumerated_refs, for easier debugging of
refcount issues.
Simple conversion: enumerate all users and convert to the new helpers.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The helpers are now:
- bch2_opt_hook_pre_set()
- bch2_opts_hooks_pre_set()
- bch2_opt_hook_post_set
Fix a bug where the filesystem discard option would incorrectly be
changed when setting the device option, and don't trigger rebalance
scans unnecessarily (when options aren't changing).
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Not all compilers fully initialize these - they're not guaranteed to
because of the union shenanigans.
Fixes: https://github.com/koverstreet/bcachefs/issues/844
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
state_lock guards against devices coming or leaving, changing state, or
the filesystem changing between ro <-> rw.
But it's not necessary for running recovery passes, and holding it
blocks asynchronous events that would cause us to go RO or kick out
devices.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
the discard option is special, because it's both a filesystem and a
device option.
When set at the filesytsem level, it's supposed to propagate to (if set
persistently via sysfs) or override (if non persistently as a mount
option) the devices - that now works correctly.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Other options can normally be set at runtime via sysfs, no reason for
this one not to be as well - it just doesn't support the degraded flags
argument this way, that requires the ioctl.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Device options now use the common code for sysfs, and can superblock
fields (in a struct bch_member).
This replaces BCH_DEV_OPT_SETTERS(), which was weird and easy to miss.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
In bcachefs, io_read and io_write counter record the amount
of data which has been read and written. They increase in
unit of sector, so to display correctly, they need to be
shifted to the left by the size of a sector. Other counters
like io_move, move_extent_{read, write, finish} also have
this problem.
In order to support different unit, we add extra column to
mark the counter type by using TYPE_COUNTER and TYPE_SECTORS
in BCH_PERSISTENT_COUNTERS().
Fixes: 1c6fdbd8f2 ("bcachefs: Initial commit")
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Since we added per-inode counters there's now far too many counters to
show in one shot - if we want this in the future, it'll have to be in
debugfs.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The sysfs attribute definition has been wrapped into macro:
rw_attribute, read_attribute and write_attribute, we can
use these helpers to uniform the attribute definition.
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The gc_gens_pos is used to show the status of bucket gen gc.
There is no need to assign write permissions for this attribute.
Here we can use read_attribute helper to define this attribute.
```
[Before]
$ ll internal/gc_gens_pos
-rw-r--r-- 1 root root 4096 Oct 28 15:27 internal/gc_gens_pos
[After]
$ ll internal/gc_gens_pos
-r--r--r-- 1 root root 4096 Oct 28 17:27 internal/gc_gens_pos
```
Fixes: ac516d0e7d ("bcachefs: Add the status of bucket gen gc to sysfs")
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
In backpointers fsck, we do a seqential scan of one btree, and check
references to another: extents <-> backpointers
Checking references generates random lookups, so we want to pin that
btree in memory (or only a range, if it doesn't fit in ram).
Previously, this was done with a simple check in the shrinker - "if
btree node is in range being pinned, don't free it" - but this generated
OOMs, as our shrinker wasn't well behaved if there was less memory
available than expected.
Instead, we now have two different shrinkers and lru lists; the second
shrinker being for pinned nodes, with seeks set much higher than normal
- so they can still be freed if necessary, but we'll prefer not to.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Bcachefs often uses this function to divide by nanosecond times - which
can easily cause problems when cast to u32. For example, `cat
/sys/fs/bcachefs/*/internal/rebalance_status` would return invalid data
in the `duration waited` field because dividing by the number of
nanoseconds in a minute requires the divisor parameter to be u64.
Signed-off-by: Reed Riley <reed@riley.engineer>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add a pretty printer so the btree reserve cache can be seen in sysfs; as
it pins open_buckets we need it for tracking down open_buckets issues.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This adds distinct counters for every reason the btree node shrinker can
fail to free an object - if our shrinker isn't making progress, this
will tell us why.
Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
If we block on the allocator for more than 10 seconds, print out some
useful debugging info.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
It turns out the btree key cache shrinker wasn't actually reclaiming
anything, prior to the previous patch. This adds instrumentation so that
if we have further issues we can see what's going on.
Specifically, sysfs internal/btree_key_cache is greatly expanded with
new counters, and the SRCU sequence numbers of the first 10 entries on
each pending freelist, and we also add trigger_btree_key_cache_shrink
for testing without having to prune all the system caches.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This is a nice cleanup - and we've also been having problems with
kthread creation in the mount path.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Combine iter/update/trigger/str_hash flags into a single enum, and
x-macroize them for a to_text() function later.
These flags are all for a specific iter/key/update context, so it makes
sense to group them together - iter/update/trigger flags were already
given distinct bits, this cleans up and unifies that handling.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
