bcachefs: Handle race between stripe reuse, invalidate_stripe_to_dev

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When creating a new stripe, we may reuse an existing stripe that has
some empty and some nonempty blocks.

Generally, the existing stripe won't change underneath us - except for
block sector counts, which we copy to the new key in
ec_stripe_key_update.

But the device removal path can now invalidate stripe pointers to a
device, and that can race with stripe reuse.

Change ec_stripe_key_update() to check for and resolve this
inconsistency.

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

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This commit is contained in:

Kent Overstreet 2024-10-13 19:38:00 -04:00

parent b1e562265e

commit cb6055e66f

2 changed files with 55 additions and 28 deletions

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73

fs/bcachefs/ec.c

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10

fs/bcachefs/extents.h

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