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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>
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Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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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>
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Previously, we were missing accounting for buckets in need_gc_gens and
need_discard states. This matters because buckets in those states need
other btree operations done before they can be used, so they can't be
conuted when checking current number of free buckets against the
allocation watermark.
Also, we weren't directly counting free buckets at all. Now, data type 0
== BCH_DATA_free, and free buckets are counted; this means we can get
rid of the separate (poorly defined) count of unavailable buckets.
This is a new on disk format version, with upgrade and fsck required for
the accounting changes.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This neatly avoids bugs where we fail partway through initializing a new
filesystem, if we just don't write out partly-initialized state.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This adds two new btrees for the upcoming allocator rewrite: an extents
btree of free buckets, and a btree for buckets awaiting discards.
We also add a new trigger for alloc keys to keep the new btrees up to
date, and a compatibility path to initialize them on existing
filesystems.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Add a new superblock field which represents journal buckets as ranges:
also move code for the superblock journal fields to journal_sb.c.
This also reworks the code for resizing the journal to write the new
superblock before using the new journal buckets, and thus be a bit
safer.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This tells the compiler to check printf format strings, and catches a
few bugs.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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We've been seeing a very strange bug where journal flush & reclaim delay
end up getting inexplicably zeroed, in the superblock. We're now
validating all the options in bch2_validate_super(), and 0 is no longer
a valid value for those options, but we need to be careful not to
prevent people's filesystems from mounting because of the new
validation.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This moves validation of superblock options to bch2_sb_validate(), so
they'll be checked in the write path as well.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Now we've got strings for metadata versions - this changes
bch2_sb_to_text() and our mount log message to use it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Options no longer have to be manually added to bch2_sb_to_text() - it
now uses the master list of options in opts.h. Also, improve some of the
formatting by converting it to tabstops.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This patch changes journal_entry_open() to initialize the new journal
entry, not __journal_entry_close().
This also means that journal_cur_seq() refers to the sequence number of
the last journal entry when we don't have an open journal entry, not the
next one.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This fixes a regression from "bcachefs: Heap allocate printbufs" -
bch2_sb_field_validate() was leaking an error string.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This patch changes printbufs dynamically allocate and reallocate a
buffer as needed. Stack usage has become a bit of a problem, and a major
cause of that has been static size string buffers on the stack.
The most involved part of this refactoring is that printbufs must now be
exited with printbuf_exit().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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vstruct_bytes() was returning a u64 - it should be a size_t, the corect
type for the size of anything that fits in memory.
Also replace a 64 bit divide with div_u64().
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Now, when outputting to printbufs, we can set tabstops and left or right
justify text to them - this is to be used by the userspace 'bcachefs fs
usage' command.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This patch improves the superblock .to_text() methods and adds methods
for all types that were missing them. It also improves printbufs by
allowing them to specfiy what units we want to be printing in, and adds
new wrapper methods for unifying our kernel and userspace environments.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This patch converts bch2_sb_validate() and the .validate methods for the
various superblock sections to take printbuf, to which they can print
detailed error messages, including printing the entire section that was
invalid.
This is a great improvement over the previous situation, where we could
only return static strings that didn't have precise information about
what was wrong.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This adds a _to_text() pretty printer for journal entries - including
every subtype - which will shortly be used by the 'bcachefs
list_journal' subcommand.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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It'll now be handled at format time and in sysfs like other options - it
still can only be set at format time, though.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This adds flags for options that must be a power of two (block size and
btree node size), and options that are stored in the superblock as a
power of two (encoded extent max).
Also: options are now stored in memory in the same units they're
displayed in (bytes): we now convert when getting and setting from the
superblock.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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We were setting BCH_FS_ERROR on startup if the superblock was marked as
containing errors, which is not what we wanted - BCH_FS_ERROR indicates
whether errors have been found, so that after a successful fsck we're
able to clear the error bit in the superblock.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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The filesystem initialization path first marks superblock and journal
buckets non transactionally, since the btree isn't functional yet. That
path was updating the per-journal-buf percpu counters via
bch2_dev_usage_update(), and updating the wrong set of counters so those
updates didn't get written out until journal entry 4.
The relevant code is going to get significantly rewritten in the future
as we transition away from the in memory bucket array, so this just
hacks around it for now.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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It's helpful to know what the superblock write is for.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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Compat features should be cleared if the filesystem was touched by a
version that doesn't support them.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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to type-checksum enum
This fixes some rare cases where the metadata checksum option specified
may map to the wrong actual checksum type.
Signed-off-by: Janpieter Sollie <janpieter.sollie@edpnet.be>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Found by sparse
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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There were some overflows in the time conversion functions - fix this by
converting tv_sec and tv_nsec separately. Also, set sb->time_min and
sb->time_max.
Fixes xfstest generic/258.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This splits out btree topology repair into a separate pass, and makes
some improvements:
- When we have to pick which of two overlapping nodes to drop keys
from, we use the btree node header sequence number to preserve the
newer node
- the gc code has been changed so that it doesn't bail out if we're
continuing/ignoring on fsck error - this way the dump tool can skip
running the repair pass but still walk all reachable metadata
- add a new superblock flag indicating when a filesystem is known to
have btree topology issues, and the topology repair pass should be
run
- changing the start/end of a node might mean keys in that node have to
be deleted: this patch handles that better by splitting it out into a
separate function and running it explicitly in the topology repair
code, previously those keys were only being dropped when the btree
node was read in.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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In userspace, we don't really have a well defined PAGE_SIZE and shouln't
be relying on it. This is some more incremental work to remove
references to it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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The superblock version fields need to be accurate to know whether a
filesystem is supported, thus we should be verifying them.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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The bkey compat code wasn't being run for btree roots in the superblock
clean section - this patch fixes it to use the journal entry validate
code.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This is to generate strings for them, so that we can print them out.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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When snapshots arrive, we won't necessarily be able to arbitrarily split
existis - when we need to split an existing extent, we'll have to check
if the extent was overwritten in child snapshots and if so emit a
whiteout for the split in the child snapshot.
Because extents couldn't span btree nodes previously, journal replay
would sometimes have to split existing extents. That's no good anymore,
but fortunately since extent handling has already been lifted above most
of the btree code there's no real need for that rule anymore.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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When the replicas mechanism was added, for tracking data by which drives
it's replicated on, the check for whether we have sufficient devices was
never updated to make use of it. This patch finally does that.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This eliminates the need to scan every bucket to regenerate dev_usage at
mount time.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Originally, bcachefs - going back to bcache - stored, for each bucket, a
16 bit counter corresponding to how long it had been since the bucket
was read from. But, this required periodically rescaling counters on
every bucket to avoid wraparound. That wasn't an issue in bcache, where
we'd perodically rewrite the per bucket metadata all at once, but in
bcachefs we're trying to avoid having to walk every single bucket.
This patch switches to persisting 64 bit io clocks, corresponding to the
64 bit bucket timestaps introduced in the previous patch with
KEY_TYPE_alloc_v2.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Ideally, this limit will be going away in the future.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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it's useful to know whether an error was for a read or a write - this
also standardizes error messages a bit more.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Various filesystem usage counters are kept in percpu counters, with one
set per in flight journal buffer. Right now all the code that deals with
it assumes that there's only two buffers/sets of counters, but the
number of journal bufs is getting increased to 4 in the next patch - so
refactor that code to not assume a constant.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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We define our own BLK_STS_REMOVED, so we need our own to_str helper too.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Improved error messages are always a good thing
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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We now update the alloc info (bucket sector counts) atomically with
journalling the update to the interior btree nodes, and we also set new
btree roots atomically with the journalled part of the btree update.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Kent Overstreet
Daniel Hill
Kent Overstreet
Janpieter Sollie
