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btrfs: add struct btrfs_eb_prealloc

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In further preparation for supporting NOFAIL allocations with retries
outside the critical section, add a struct to carry the extent_buffer
and btrfs_folio_state we need to allocate.

Refactor the allocation pathways to use the new struct but with no
functional change. Wire empty prealloc structs in from callers.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Boris Burkov 2026-07-21 15:42:13 -07:00 • committed by David Sterba
commit 368f20e65a
7 changed files with 166 additions and 67 deletions
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