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Some additional send stream validity checking

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Check in the DMU whether an object record in a send stream being
received contains an unsupported dnode slot count, and return an
error if it does. Failure to catch an unsupported dnode slot count
would result in a panic when the SPA attempts to increment the
reference count for the large_dnode feature and the pool has the
feature disabled. This is not normally an issue for a well-formed
send stream which would have the DMU_BACKUP_FEATURE_LARGE_DNODE flag
set if it contains large dnodes, so it will be rejected as
unsupported if the required feature is disabled. This change adds a
missing object record field validation.

Add missing stream feature flag checks in
dmu_recv_resume_begin_check().

Consolidate repetitive comment blocks in dmu_recv_begin_check().

Update zstreamdump to print the dnode slot count (dn_slots) for an
object record when running in verbose mode.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes #6396
This commit is contained in:
Ned Bass
2017-07-25 18:52:40 -07:00
committed by Brian Behlendorf
parent 3f759c0c73
commit 73aac4aa41
2 changed files with 22 additions and 10 deletions
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cmd/zstreamdump/zstreamdump.c
+4 -2
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@@ -422,12 +422,14 @@ main(int argc, char *argv[])
}
if (verbose) {
(void) printf("OBJECT object = %llu type = %u "
"bonustype = %u blksz = %u bonuslen = %u\n",
"bonustype = %u blksz = %u bonuslen = %u "
"dn_slots = %u\n",
(u_longlong_t)drro->drr_object,
drro->drr_type,
drro->drr_bonustype,
drro->drr_blksz,
drro->drr_bonuslen);
drro->drr_bonuslen,
drro->drr_dn_slots);
}
if (drro->drr_bonuslen > 0) {
(void) ssread(buf,