Add an option for completely disabling casefolding on a filesystem, as a
workaround for overlayfs.
This should only be needed as a temporary workaround, until the
overlayfs fix arrives.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We had a bug where bch2_evict_inode() incorrectly called bch2_inode_rm()
- the journal clearly showed the inode was not unlinked.
We've got checks that we use in recovery when cleaning up deleted
inodes, lift them to bch2_inode_rm() as well.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add a flag for tracking whether a directory has case-insensitive
descendents - so that overlayfs can disallow mounting, even though the
filesystem supports case insensitivity.
This is a new on disk format version, with a (cheap) upgrade to ensure
the flag is correctly set on existing inodes.
Create, rename and fssetxattr are all plumbed to ensure the new flag is
set, and we've got new fsck code that hooks into check_inode(0.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Move a fsck.c helper into inode.c, eliminate some duplicate and organize
the inode lookup helpers.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bi_casefold only makes sense for directories, and since it's one of the
variable length fields setting it unnecessarily wastes space.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Changing the casefold option requires extra checks/work - factor out a
helper from bch2_fileattr_set() for the xattr code to use.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This was planned to be done ages ago, now finally completed; there are
places where we have quite a few btree_trans objects on the stack, so
this reduces stack usage somewhat.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We're hitting some issues with uninitialized struct padding, flagged by
kmsan.
They appear to be falso positives, otherwise bch2_accounting_validate()
would have flagged them as "junk at end". But for now, we'll need to
initialize disk_accounting_pos with memset().
This adds a new helper, bch2_disk_accounting_mod2(), that initializes a
disk_accounting_pos and does the accounting mod all at once - so overall
things actually get slightly more ergonomic.
BCH_DISK_ACCOUNTING_replicas keys are left for now; KMSAN isn't warning
about them and they're a bit special.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Replace these with proper private error codes, so that when we get an
error message we're not sifting through the entire codebase to see where
it came from.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Persistent cursors for inode allocation.
A free inodes btree would add substantial overhead to inode allocation
and freeing - a "next num to allocate" cursor is always going to be
faster.
We just need it to be persistent, to avoid scanning the inodes btree
from the start on startup.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add a new parameter to bkey validate functions, and use it to improve
invalid bkey error messages: we can now print the btree and depth it
came from, or if it came from the journal, or is a btree root.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This is going to be used in the bch_extent_rebalance improvements, which
propagate io_path options into the extent (important for rebalance,
which needs something present in the extent for transactionally tagging
them in the rebalance_work btree, and also for indirect extents).
By tracking in bch_extent_rebalance whether the option came from the
filesystem or the inode we can correctly handle options being changed on
indirect extents.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Lots of hotfixes:
- transaction restart injection has been shaking out a few things
- fix a data corruption in the buffered write path on -ENOSPC, found by
xfstests generic/299
- Some small show_options fixes
- Repair mismatches in inode hash type, seed: different snapshot
versions of an inode must have the same hash/type seed, used for
directory entries and xattrs. We were checking the hash seed, but not
the type, and a user contributed a filesystem where the hash type on
one inode had somehow been flipped; these fixes allow his filesystem
to repair.
Additionally, the hash type flip made some directory entries
invisible, which were then recreated by userspace; so the hash check
code now checks for duplicate non dangling dirents, and renames one of
them if necessary.
- Don't use wait_event_interruptible() in recovery: this fixes some
filesystems failing to mount with -ERESTARTSYS
- Workaround for kvmalloc not supporting > INT_MAX allocations, causing
an -ENOMEM when allocating the sorted array of journal keys: this
allows a 75 TB filesystem to mount
- Make sure bch_inode_unpacked.bi_snapshot is set in the old inode
compat path: this alllows Marcin's filesystem (in use since before
6.7) to repair and mount.
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Merge tag 'bcachefs-2024-10-22' of https://github.com/koverstreet/bcachefs
Pull bcachefs fixes from Kent Overstreet:
"Lots of hotfixes:
- transaction restart injection has been shaking out a few things
- fix a data corruption in the buffered write path on -ENOSPC, found
by xfstests generic/299
- Some small show_options fixes
- Repair mismatches in inode hash type, seed: different snapshot
versions of an inode must have the same hash/type seed, used for
directory entries and xattrs. We were checking the hash seed, but
not the type, and a user contributed a filesystem where the hash
type on one inode had somehow been flipped; these fixes allow his
filesystem to repair.
Additionally, the hash type flip made some directory entries
invisible, which were then recreated by userspace; so the hash
check code now checks for duplicate non dangling dirents, and
renames one of them if necessary.
- Don't use wait_event_interruptible() in recovery: this fixes some
filesystems failing to mount with -ERESTARTSYS
- Workaround for kvmalloc not supporting > INT_MAX allocations,
causing an -ENOMEM when allocating the sorted array of journal
keys: this allows a 75 TB filesystem to mount
- Make sure bch_inode_unpacked.bi_snapshot is set in the old inode
compat path: this alllows Marcin's filesystem (in use since before
6.7) to repair and mount"
* tag 'bcachefs-2024-10-22' of https://github.com/koverstreet/bcachefs: (26 commits)
bcachefs: Set bch_inode_unpacked.bi_snapshot in old inode path
bcachefs: Mark more errors as AUTOFIX
bcachefs: Workaround for kvmalloc() not supporting > INT_MAX allocations
bcachefs: Don't use wait_event_interruptible() in recovery
bcachefs: Fix __bch2_fsck_err() warning
bcachefs: fsck: Improve hash_check_key()
bcachefs: bch2_hash_set_or_get_in_snapshot()
bcachefs: Repair mismatches in inode hash seed, type
bcachefs: Add hash seed, type to inode_to_text()
bcachefs: INODE_STR_HASH() for bch_inode_unpacked
bcachefs: Run in-kernel offline fsck without ratelimit errors
bcachefs: skip mount option handle for empty string.
bcachefs: fix incorrect show_options results
bcachefs: Fix data corruption on -ENOSPC in buffered write path
bcachefs: bch2_folio_reservation_get_partial() is now better behaved
bcachefs: fix disk reservation accounting in bch2_folio_reservation_get()
bcachefS: ec: fix data type on stripe deletion
bcachefs: Don't use commit_do() unnecessarily
bcachefs: handle restarts in bch2_bucket_io_time_reset()
bcachefs: fix restart handling in __bch2_resume_logged_op_finsert()
...
This fixes a fsck bug on a very old filesystem (pre mainline merge).
Fixes: 72350ee0ea ("bcachefs: Kill snapshot arg to fsck_write_inode()")
Reported-by: Marcin Mirosław <marcin@mejor.pl>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This helped with discovering some filesystem corruption fsck has having
trouble with: the str_hash type had gotten flipped on one snapshot's
version of an inode.
All versions of a given inode number have the same hash seed and hash
type, since lookups will be done with a single hash/seed and type and
see dirents/xattrs from multiple snapshots.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Using commit_do() to call alloc_sectors_start_trans() breaks when we're
randomly injecting transaction restarts - the restart in the commit
causes us to leak the lock that alloc_sectorS_start_trans() takes.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
- New metadata version inode_has_child_snapshots
This fixes bugs with handling of unlinked inodes + snapshots, in
particular when an inode is reattached after taking a snapshot;
deleted inodes now get correctly cleaned up across snapshots.
- Disk accounting rewrite fixes
- validation fixes for when a device has been removed
- fix journal replay failing with "journal_reclaim_would_deadlock"
- Some more small fixes for erasure coding + device removal
- Assorted small syzbot fixes
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Merge tag 'bcachefs-2024-10-14' of git://evilpiepirate.org/bcachefs
Pull bcachefs fixes from Kent Overstreet:
- New metadata version inode_has_child_snapshots
This fixes bugs with handling of unlinked inodes + snapshots, in
particular when an inode is reattached after taking a snapshot;
deleted inodes now get correctly cleaned up across snapshots.
- Disk accounting rewrite fixes
- validation fixes for when a device has been removed
- fix journal replay failing with "journal_reclaim_would_deadlock"
- Some more small fixes for erasure coding + device removal
- Assorted small syzbot fixes
* tag 'bcachefs-2024-10-14' of git://evilpiepirate.org/bcachefs: (27 commits)
bcachefs: Fix sysfs warning in fstests generic/730,731
bcachefs: Handle race between stripe reuse, invalidate_stripe_to_dev
bcachefs: Fix kasan splat in new_stripe_alloc_buckets()
bcachefs: Add missing validation for bch_stripe.csum_granularity_bits
bcachefs: Fix missing bounds checks in bch2_alloc_read()
bcachefs: fix uaf in bch2_dio_write_done()
bcachefs: Improve check_snapshot_exists()
bcachefs: Fix bkey_nocow_lock()
bcachefs: Fix accounting replay flags
bcachefs: Fix invalid shift in member_to_text()
bcachefs: Fix bch2_have_enough_devs() for BCH_SB_MEMBER_INVALID
bcachefs: __wait_for_freeing_inode: Switch to wait_bit_queue_entry
bcachefs: Check if stuck in journal_res_get()
closures: Add closure_wait_event_timeout()
bcachefs: Fix state lock involved deadlock
bcachefs: Fix NULL pointer dereference in bch2_opt_to_text
bcachefs: Release transaction before wake up
bcachefs: add check for btree id against max in try read node
bcachefs: Disk accounting device validation fixes
bcachefs: bch2_inode_or_descendents_is_open()
...
fsck can now correctly check if inodes in interior snapshot nodes are
open/in use.
- Tweak the vfs inode rhashtable so that the subvolume ID isn't hashed,
meaning inums in different subvolumes will hash to the same slot. Note
that this is a hack, and will cause problems if anyone ever has the
same file in many different snapshots open all at the same time.
- Then check if any of those subvolumes is a descendent of the snapshot
ID being checked
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
There's an inherent race in taking a snapshot while an unlinked file is
open, and then reattaching it in the child snapshot.
In the interior snapshot node the file will appear unlinked, as though
it should be deleted - it's not referenced by anything in that snapshot
- but we can't delete it, because the file data is referenced by the
child snapshot.
This was being handled incorrectly with
propagate_key_to_snapshot_leaves() - but that doesn't resolve the
fundamental inconsistency of "this file looks like it should be deleted
according to normal rules, but - ".
To fix this, we need to fix the rule for when an inode is deleted. The
previous rule, ignoring snapshots (there was no well-defined rule
for with snapshots) was:
Unlinked, non open files are deleted, either at recovery time or
during online fsck
The new rule is:
Unlinked, non open files, that do not exist in child snapshots, are
deleted.
To make this work transactionally, we add a new inode flag,
BCH_INODE_has_child_snapshot; it overrides BCH_INODE_unlinked when
considering whether to delete an inode, or put it on the deleted list.
For transactional consistency, clearing it handled by the inode trigger:
when deleting an inode we check if there are parent inodes which can now
have the BCH_INODE_has_child_snapshot flag cleared.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
A lot of little fixes, bigger ones include:
- bcachefs's __wait_on_freeing_inode() was broken in rc1 due to vfs
changes, now fixed along with another lost wakeup
- fragmentation LRU fixes; fsck now repairs successfully (this is the
data structure copygc uses); along with some nice simplification.
- Rework logged op error handling, so that if logged op replay errors
(due to another filesystem error) we delete the logged op instead of
going into an infinite loop)
- Various small filesystem connectivitity repair fixes
The final part of this patch series, fixing snapshots + unlinked file
handling, is now out on the list - I'm giving that part of the series
more time for user testing.
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Merge tag 'bcachefs-2024-10-05' of git://evilpiepirate.org/bcachefs
Pull bcachefs fixes from Kent Overstreet:
"A lot of little fixes, bigger ones include:
- bcachefs's __wait_on_freeing_inode() was broken in rc1 due to vfs
changes, now fixed along with another lost wakeup
- fragmentation LRU fixes; fsck now repairs successfully (this is the
data structure copygc uses); along with some nice simplification.
- Rework logged op error handling, so that if logged op replay errors
(due to another filesystem error) we delete the logged op instead
of going into an infinite loop)
- Various small filesystem connectivitity repair fixes"
* tag 'bcachefs-2024-10-05' of git://evilpiepirate.org/bcachefs:
bcachefs: Rework logged op error handling
bcachefs: Add warn param to subvol_get_snapshot, peek_inode
bcachefs: Kill snapshot arg to fsck_write_inode()
bcachefs: Check for unlinked, non-empty dirs in check_inode()
bcachefs: Check for unlinked inodes with dirents
bcachefs: Check for directories with no backpointers
bcachefs: Kill alloc_v4.fragmentation_lru
bcachefs: minor lru fsck fixes
bcachefs: Mark more errors AUTOFIX
bcachefs: Make sure we print error that causes fsck to bail out
bcachefs: bkey errors are only AUTOFIX during read
bcachefs: Create lost+found in correct snapshot
bcachefs: Fix reattach_inode()
bcachefs: Add missing wakeup to bch2_inode_hash_remove()
bcachefs: Fix trans_commit disk accounting revert
bcachefs: Fix bch2_inode_is_open() check
bcachefs: Fix return type of dirent_points_to_inode_nowarn()
bcachefs: Fix bad shift in bch2_read_flag_list()
These shouldn't always be fatal errors - logged op resume, in
particular, and we want it as a parameter there.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
It was initially believed that it would be better to be explicit about
the snapshot we're updating when writing inodes in fsck; however, it
turns out that passing around the snapshot separately is more error
prone and we're usually updating the inode in the same snapshow we read
it from.
This is different from normal filesystem paths, where we do the update
in the snapshot of the subvolume we're in.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.
auto-generated by the following:
for i in `git grep -l -w asm/unaligned.h`; do
sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
Add a filesystem flag to indicate whether we did a clean recovery -
using c->sb.clean after we've got rw is incorrect, since c->sb is
updated whenever we write the superblock.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
the standard vfs inode hash table suffers from painful lock contention -
this is long overdue
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bkey_fsck_err() was added as an interface that looks like fsck_err(),
but previously all it did was ensure that the appropriate error counter
was incremented in the superblock.
This is a cleanup and bugfix patch that converts it to a wrapper around
fsck_err(). This is needed to fix an issue with the upgrade path to
disk_accounting_v3, where the "silent fix" error list now includes
bkey_fsck errors; fsck_err() handles this in a unified way, and since we
need to change printing of bkey fsck errors from the caller to the inner
bkey_fsck_err() calls, this ends up being a pretty big change.
Als,, rename .invalid() methods to .validate(), for clarity, while we're
changing the function signature anyways (to drop the printbuf argument).
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
fsck_err() now optionally takes a btree_trans; if the current thread has
one, it is required that it be passed.
The next patch will use this to unlock when waiting for user input.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Rewrite fsck/gc for the new accounting scheme.
This adds a second set of in-memory accounting counters for gc to use;
like with other parts of gc we run all trigger in TRIGGER_GC mode, then
compare what we calculated to existing in-memory accounting at the end.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Main part of the disk accounting rewrite.
This is a wholesale rewrite of the existing disk space accounting, which
relies on percepu counters that are sharded by journal buffer, and
rolled up and added to each journal write.
With the new scheme, every set of counters is a distinct key in the
accounting btree; this fixes scaling limitations of the old scheme,
where counters took up space in each journal entry and required multiple
percpu counters.
Now, in memory accounting requires a single set of percpu counters - not
multiple for each in flight journal buffer - and in the future we'll
probably also have counters that don't use in memory percpu counters,
they're not strictly required.
An accounting update is now a normal btree update, using the btree write
buffer path. At transaction commit time, we apply accounting updates to
the in memory counters, which are percpu counters indexed in an
eytzinger tree by the accounting key.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Before patch:
```
#cat btrees/inodes/keys
u64s 17 type inode_v3 0:4096:U32_MAX len 0 ver 0: mode=40755
flags= (16300000)
bi_size=0
```
After patch:
```
#cat btrees/inodes/keys
u64s 17 type inode_v3 0:4096:U32_MAX len 0 ver 0:
mode=40755
flags=(16300000)
bi_size=0
```
Signed-off-by: Youling Tang <tangyouling@kylinos.cn>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We're about to start using bch_validate_flags for superblock section
validation - it's no longer bkey specific.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
When building with clang's -Wincompatible-function-pointer-types-strict
(a warning designed to catch potential kCFI failures at build time),
there are several warnings along the lines of:
fs/bcachefs/bkey_methods.c:118:2: error: incompatible function pointer types initializing 'int (*)(struct btree_trans *, enum btree_id, unsigned int, struct bkey_s_c, struct bkey_s, enum btree_iter_update_trigger_flags)' with an expression of type 'int (struct btree_trans *, enum btree_id, unsigned int, struct bkey_s_c, struct bkey_s, unsigned int)' [-Werror,-Wincompatible-function-pointer-types-strict]
118 | BCH_BKEY_TYPES()
| ^~~~~~~~~~~~~~~~
fs/bcachefs/bcachefs_format.h:394:2: note: expanded from macro 'BCH_BKEY_TYPES'
394 | x(inode, 8) \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
fs/bcachefs/bkey_methods.c:117:41: note: expanded from macro 'x'
117 | #define x(name, nr) [KEY_TYPE_##name] = bch2_bkey_ops_##name,
| ^~~~~~~~~~~~~~~~~~~~
<scratch space>:277:1: note: expanded from here
277 | bch2_bkey_ops_inode
| ^~~~~~~~~~~~~~~~~~~
fs/bcachefs/inode.h:26:13: note: expanded from macro 'bch2_bkey_ops_inode'
26 | .trigger = bch2_trigger_inode, \
| ^~~~~~~~~~~~~~~~~~
There are several functions that did not have their flags parameter
converted to 'enum btree_iter_update_trigger_flags' in the recent
unification, which will cause kCFI failures at runtime because the
types, while ABI compatible (hence no warning from the non-strict
version of this warning), do not match exactly.
Fix up these functions (as well as a few other obvious functions that
should have it, even if there are no warnings currently) to resolve the
warnings and potential kCFI runtime failures.
Fixes: 31e4ef3280c8 ("bcachefs: iter/update/trigger/str_hash flag cleanup")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
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>
