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Receive checks should allow unencrypted child datasets

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dmu_recv_begin_check() unconditionally sets the DS_HOLD_FLAG_DECRYPT
flag before calling dsl_dataset_hold_flags(). If the key on the
receiving side isn't loaded or the send stream contains embedded
blocks, the receive check fails for a stream which is perfectly
valid and could be received without any problem. This seems like
a remnant of the initial design, where unencrypted datasets below
encrypted ones weren't allowed.

Add a condition to set `DS_HOLD_FLAG_DECRYPT` only for encrypted
datasets, modify an existing test to detect this regression and add
a test for raw replication streams.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Co-authored-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #13033 
Closes #13076
This commit is contained in:
Attila Fülöp
2022-02-09 23:38:33 +01:00
committed by Tony Hutter
parent 2681f8a5b8
commit 5c19af07d4
5 changed files with 102 additions and 7 deletions
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module/zfs/dmu_recv.c
+9 -1
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@@ -597,7 +597,15 @@ dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
if (!(flags & DRR_FLAG_SPILL_BLOCK))
return (SET_ERROR(ZFS_ERR_SPILL_BLOCK_FLAG_MISSING));
} else {
dsflags |= DS_HOLD_FLAG_DECRYPT;
/*
* We support unencrypted datasets below encrypted ones now,
* so add the DS_HOLD_FLAG_DECRYPT flag only if we are dealing
* with a dataset we may encrypt.
*/
if (drba->drba_dcp != NULL &&
drba->drba_dcp->cp_crypt != ZIO_CRYPT_OFF) {
dsflags |= DS_HOLD_FLAG_DECRYPT;
}
}
error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds);