bcachefs: Add error path to btree_split()

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The next patch in the series is (finally!) going to change btree splits
(and interior updates in general) to not take intent locks all the way
up to the root - instead only locking the nodes they'll need to modify.

However, this will be introducing a race since if we're not holding a
write lock on a btree node it can be written out by another thread, and
then we might not have enough space for a new bset entry.

We can handle this by retrying - we just need to introduce a new error
path.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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This commit is contained in:

Kent Overstreet 2022-10-01 22:15:30 -04:00

parent 8cbb000250

commit a8eefbd324

2 changed files with 88 additions and 18 deletions

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105

fs/bcachefs/btree_update_interior.c

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1

fs/bcachefs/errcode.h

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