Alan Somers
fa2cdaa604
More aggressively assert that db_mtx protects db.db_data
...
db.db_mtx must be held any time that db.db_data is accessed. All of
these functions do have the lock held by a parent; add assertions to
ensure that it stays that way.
See https://github.com/openzfs/zfs/discussions/17118
* Refactor dbuf_read_bonus to make it obvious why db_rwlock isn't
required.
* Refactor dbuf_hold_copy to eliminate the db_rwlock
Copy data into the newly allocated buffer before assigning it to the db.
That way, there will be no need to take db->db_rwlock.
* Refactor dbuf_read_hole
In the case of an indirect hole, initialize the newly allocated buffer
before assigning it to the dmu_buf_impl_t.
Sponsored by: ConnectWise
Signed-off-by: Alan Somers <asomers@gmail.com >
Closes #17209
(cherry picked from commit c17bdc4914 )
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