kernel.git/fs/bcachefs/btree_cache.h, branch linux-6.7.y

bcachefs: bch2_btree_id_str()

2023-10-31T16:18:37Z

Since we can run with unknown btree IDs, we can't directly index btree IDs into fixed size arrays. Signed-off-by: Kent Overstreet

bcachefs: Assorted sparse fixes

2023-10-22T21:10:06Z

- endianness fixes - mark some things static - fix a few __percpu annotations - fix silent enum conversions Signed-off-by: Kent Overstreet

bcachefs: Allow for unknown btree IDs

2023-10-22T21:10:05Z

We need to allow filesystems with metadata from newer versions to be mountable and usable by older versions. This patch enables us to roll out new btrees without a new major version number; we can now handle btree roots for unknown btree types. The unknown btree roots will be retained, and fsck (including backpointers) will check them, the same as other btree types. We add a dynamic array for the extra, unknown btree roots, in addition to the fixed size btree root array, and add new helpers for looking up btree roots. Signed-off-by: Kent Overstreet

bcachefs: bch2_btree_node_to_text() const correctness

2023-10-22T21:09:56Z

This is for the Rust interface - Rust cares more about const than C does. Signed-off-by: Kent Overstreet

bcachefs: Plumb btree_trans through btree cache code

2023-10-22T21:09:55Z

Soon, __bch2_btree_node_write() is going to require a btree_trans: zoned device support is going to require a new allocation for every btree node write. This is a bit of prep work. Signed-off-by: Kent Overstreet

bcachefs: Move bkey bkey_unpack_key() to bkey.h

2023-10-22T21:09:45Z

Long ago, bkey_unpack_key() was added to bset.h instead of bkey.h because bkey.h didn't include btree_types.h, which it needs for the compiled unpack function. This patch finally moves it to the proper location. Signed-off-by: Kent Overstreet

bcachefs: New locking functions

2023-10-22T21:09:40Z

In the future, with the new deadlock cycle detector, we won't be using bare six_lock_* anymore: lock wait entries will all be embedded in btree_trans, and we will need a btree_trans context whenever locking a btree node. This patch plumbs a btree_trans to the few places that need it, and adds two new locking functions - btree_node_lock_nopath, which may fail returning a transaction restart, and - btree_node_lock_nopath_nofail, to be used in places where we know we cannot deadlock (i.e. because we're holding no other locks). Signed-off-by: Kent Overstreet

bcachefs: Fix usage of six lock's percpu mode

2023-10-22T21:09:26Z

Six locks have a percpu mode, which we use for interior btree nodes, as well as btree key cache keys for the subvolumes btree. We've been switching locks back and forth between percpu and non percpu mode as needed, but it turns out this is racy - when we're reusing an existing node, other threads could be attempting to lock it while we're switching it between modes. This patch fixes this by never switching 'struct btree' between the two modes, and instead segragating them between two different freed lists. Signed-off-by: Kent Overstreet Signed-off-by: Kent Overstreet

bcachefs: Use x-macros for btree node flags

2023-10-22T21:09:26Z

This is for adding an array of strings for btree node flag names. Signed-off-by: Kent Overstreet

bcachefs: Option improvements

2023-10-22T21:09:19Z

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