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Revert "Fix raw sends on encrypted datasets when copying back snapshots"

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Commit d1d4769 takes into account the encryption key version to
decide if the local_mac could be zeroed out. However, this could lead
to failure mounting encrypted datasets created with intermediate
versions of ZFS encryption available in master between major releases.
In order to prevent this situation revert d1d4769 pending a more
comprehensive fix which addresses the mount failure case.

Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #11294
Issue #12025
Issue #12300
Closes #12033
This commit is contained in:
Brian Behlendorf
2021-05-13 10:00:17 -07:00
parent ade8e4b7d6
commit faa5673982
6 changed files with 12 additions and 143 deletions
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module/os/linux/zfs/zio_crypt.c
+1 -14
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@@ -1197,16 +1197,6 @@ zio_crypt_do_objset_hmacs(zio_crypt_key_t *key, void *data, uint_t datalen,
bcopy(raw_portable_mac, portable_mac, ZIO_OBJSET_MAC_LEN);
/*
* This is necessary here as we check next whether
* OBJSET_FLAG_USERACCOUNTING_COMPLETE or
* OBJSET_FLAG_USEROBJACCOUNTING are set in order to
* decide if the local_mac should be zeroed out.
*/
intval = osp->os_flags;
if (should_bswap)
intval = BSWAP_64(intval);
/*
* The local MAC protects the user, group and project accounting.
* If these objects are not present, the local MAC is zeroed out.
@@ -1218,10 +1208,7 @@ zio_crypt_do_objset_hmacs(zio_crypt_key_t *key, void *data, uint_t datalen,
(datalen >= OBJSET_PHYS_SIZE_V2 &&
osp->os_userused_dnode.dn_type == DMU_OT_NONE &&
osp->os_groupused_dnode.dn_type == DMU_OT_NONE) ||
(datalen <= OBJSET_PHYS_SIZE_V1) ||
(((intval & OBJSET_FLAG_USERACCOUNTING_COMPLETE) == 0 ||
(intval & OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE) == 0) &&
key->zk_version > 0)) {
(datalen <= OBJSET_PHYS_SIZE_V1)) {
bzero(local_mac, ZIO_OBJSET_MAC_LEN);
return (0);
}