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b171cacf4f
This change makes the zone table lock-free for reads. Previously, the zone table used a red-black tree, which is not thread safe, so the hot read path acquired both the per-view mutex and the per-zonetable rwlock. (The double locking was to fix to cleanup races on shutdown.) One visible difference is that zones are not necessarily shut down promptly: it depends on when the qp-trie garbage collector cleans up the zone table. The `catz` system test checks several times that zones have been deleted; the test now checks for zones to be removed from the server configuration, instead of being fully shut down. The catz test does not churn through enough zones to trigger a gc, so the zones are not fully detached until the server exits. After this change, it is still possible to improve the way we handle changes to the zone table, for instance, batching changes, or better compaction heuristics. |
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| .. | ||
| dns_master_load.in | ||
| dns_message_checksig.in | ||
| dns_message_parse.in | ||
| dns_name_fromtext_target.in | ||
| dns_name_fromwire.in | ||
| dns_qp.in | ||
| dns_qpkey_name.in | ||
| dns_rdata_fromtext.in | ||
| dns_rdata_fromwire_text.in | ||
| isc_lex_getmastertoken.in | ||
| isc_lex_gettoken.in | ||
| .gitignore | ||
| afl.sh | ||
| dns_master_load.c | ||
| dns_message_checksig.c | ||
| dns_message_parse.c | ||
| dns_name_fromtext_target.c | ||
| dns_name_fromwire.c | ||
| dns_qp.c | ||
| dns_qpkey_name.c | ||
| dns_rdata_fromtext.c | ||
| dns_rdata_fromwire_text.c | ||
| fuzz.h | ||
| FUZZING.md | ||
| isc_lex_getmastertoken.c | ||
| isc_lex_gettoken.c | ||
| libfuzzer.sh | ||
| main.c | ||
| Makefile.am | ||
| old.c | ||
| old.h | ||