[PATCH 00/32] bcachefs - a new COW filesystem

Kent Overstreet
2023-05-09T16:57:20Z

I'm submitting the bcachefs filesystem for review and inclusion.

Included in this patch series are all the non fs/bcachefs/ patches. The
entire tree, based on v6.3, may be found at:

http://evilpiepirate.org/git/bcachefs.git bcachefs-for-upstream

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bcachefs overview, status:

Features:
- too many to list

Known bugs:
- too many to list

Status:
- Snapshots have been declared stable; one serious bug report
outstanding to look into, most users report it working well.

These are RW btrfs-style snapshots, but with far better scalability
and no scalability issues with sparse snapshots due to key level
versioning.

- Erasure coding is getting really close; hope to have it ready for
users to beat on it by this summer. This is a novel RAID/erasure
coding design with no write hole, and no fragmentation of writes
(e.g. RAIDZ).

- Tons of scalabality work finished over the past year, users are
running it on 100 TB filesystems without complaint, waiting for first
1 PB user; next thing to address re: scalability is fsck/recovery
memory usage.

- Test infrastructure! Major project milestone, check out our test
dashboard at
https://evilpiepirate.org/~testdashboard/ci?branch=bcachefs

Other project notes:

irc::/irc.oftc.net/bcache is where most activity happens; I'm always
there, and most code review happens there - I find the conversational
format more productive.

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patches in this series:

Christopher James Halse Rogers (1):
stacktrace: Export stack_trace_save_tsk

Daniel Hill (1):
lib: add mean and variance module.

Dave Chinner (3):
vfs: factor out inode hash head calculation
hlist-bl: add hlist_bl_fake()
vfs: inode cache conversion to hash-bl

Kent Overstreet (27):
Compiler Attributes: add __flatten
locking/lockdep: lock_class_is_held()
locking/lockdep: lockdep_set_no_check_recursion()
locking: SIX locks (shared/intent/exclusive)
MAINTAINERS: Add entry for six locks
sched: Add task_struct->faults_disabled_mapping
mm: Bring back vmalloc_exec
fs: factor out d_mark_tmpfile()
block: Add some exports for bcachefs
block: Allow bio_iov_iter_get_pages() with bio->bi_bdev unset
block: Bring back zero_fill_bio_iter
block: Rework bio_for_each_segment_all()
block: Rework bio_for_each_folio_all()
block: Don't block on s_umount from __invalidate_super()
bcache: move closures to lib/
MAINTAINERS: Add entry for closures
closures: closure_wait_event()
closures: closure_nr_remaining()
closures: Add a missing include
iov_iter: copy_folio_from_iter_atomic()
MAINTAINERS: Add entry for generic-radix-tree
lib/generic-radix-tree.c: Don't overflow in peek()
lib/generic-radix-tree.c: Add a missing include
lib/generic-radix-tree.c: Add peek_prev()
lib/string_helpers: string_get_size() now returns characters wrote
lib: Export errname
MAINTAINERS: Add entry for bcachefs

MAINTAINERS | 39 +
block/bdev.c | 2 +-
block/bio.c | 57 +-
block/blk-core.c | 1 +
block/blk-map.c | 38 +-
block/blk.h | 1 -
block/bounce.c | 12 +-
drivers/md/bcache/Kconfig | 10 +-
drivers/md/bcache/Makefile | 4 +-
drivers/md/bcache/bcache.h | 2 +-
drivers/md/bcache/btree.c | 8 +-
drivers/md/bcache/super.c | 1 -
drivers/md/bcache/util.h | 3 +-
drivers/md/dm-crypt.c | 10 +-
drivers/md/raid1.c | 4 +-
fs/btrfs/disk-io.c | 4 +-
fs/btrfs/extent_io.c | 50 +-
fs/btrfs/raid56.c | 14 +-
fs/crypto/bio.c | 9 +-
fs/dcache.c | 12 +-
fs/erofs/zdata.c | 4 +-
fs/ext4/page-io.c | 8 +-
fs/ext4/readpage.c | 4 +-
fs/f2fs/data.c | 20 +-
fs/gfs2/lops.c | 10 +-
fs/gfs2/meta_io.c | 8 +-
fs/inode.c | 218 +++--
fs/iomap/buffered-io.c | 14 +-
fs/mpage.c | 4 +-
fs/squashfs/block.c | 48 +-
fs/squashfs/lz4_wrapper.c | 17 +-
fs/squashfs/lzo_wrapper.c | 17 +-
fs/squashfs/xz_wrapper.c | 19 +-
fs/squashfs/zlib_wrapper.c | 18 +-
fs/squashfs/zstd_wrapper.c | 19 +-
fs/super.c | 40 +-
fs/verity/verify.c | 9 +-
include/linux/bio.h | 132 +--
include/linux/blkdev.h | 1 +
include/linux/bvec.h | 70 +-
.../md/bcache => include/linux}/closure.h | 46 +-
include/linux/compiler_attributes.h | 5 +
include/linux/dcache.h | 1 +
include/linux/fs.h | 10 +-
include/linux/generic-radix-tree.h | 68 +-
include/linux/list_bl.h | 22 +
include/linux/lockdep.h | 10 +
include/linux/lockdep_types.h | 2 +-
include/linux/mean_and_variance.h | 219 +++++
include/linux/sched.h | 1 +
include/linux/six.h | 210 +++++
include/linux/string_helpers.h | 4 +-
include/linux/uio.h | 2 +
include/linux/vmalloc.h | 1 +
init/init_task.c | 1 +
kernel/Kconfig.locks | 3 +
kernel/locking/Makefile | 1 +
kernel/locking/lockdep.c | 46 ++
kernel/locking/six.c | 779 ++++++++++++++++++
kernel/module/main.c | 4 +-
kernel/stacktrace.c | 2 +
lib/Kconfig | 3 +
lib/Kconfig.debug | 18 +
lib/Makefile | 2 +
{drivers/md/bcache => lib}/closure.c | 36 +-
lib/errname.c | 1 +
lib/generic-radix-tree.c | 76 +-
lib/iov_iter.c | 53 +-
lib/math/Kconfig | 3 +
lib/math/Makefile | 2 +
lib/math/mean_and_variance.c | 136 +++
lib/math/mean_and_variance_test.c | 155 ++++
lib/string_helpers.c | 8 +-
mm/nommu.c | 18 +
mm/vmalloc.c | 21 +
75 files changed, 2485 insertions(+), 445 deletions(-)
rename {drivers/md/bcache => include/linux}/closure.h (93%)
create mode 100644 include/linux/mean_and_variance.h
create mode 100644 include/linux/six.h
create mode 100644 kernel/locking/six.c
rename {drivers/md/bcache => lib}/closure.c (88%)
create mode 100644 lib/math/mean_and_variance.c
create mode 100644 lib/math/mean_and_variance_test.c

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2.40.1