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moneromooo-monero authored Jul 31, 2017 and Howard Chu committed Oct 10, 2020

used to open the previous meta page, in case the latest one
is corrupted

From https://github.com/LMDB/lmdb/pull/12

Hallvard Furuseth authored Jul 29, 2017 and Howard Chu committed Oct 10, 2020

The old name resembled existing function mdb_env_get_flags().

Hallvard Furuseth authored Jul 29, 2017 and Howard Chu committed Oct 10, 2020

...when we search dirty list before instead of after spill list.

Hallvard Furuseth authored Jul 27, 2017 and Howard Chu committed Oct 10, 2020

Skip pages that are dirty only in an ancestor txn

Hallvard Furuseth authored Jul 27, 2017 and Howard Chu committed Oct 10, 2020

Needed since 418ea8b94e14567ba2be9f9772f38f563a0d7e9c introduced
option MDB_REMAP_CHUNKS.

Set C_DEL flag on reinit'd subcursor

Don't spill an ovpg that is referenced in a cursor

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

mt_workid = mt_txnid when WRITEMAP, so dirty pages == "spilled"
pages and mdb_page_flush() does nothing.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

In nested txns, check mp_txnid to see which txn dirtied the page.
This change will also let us remove the P_DIRTY flag, and keep
some flags in (dirty page).mp_txnid if we should need it.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

...to have something substantial to test P_ADM_FLAGS with,
at least until we drop the P_DIRTY flag.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

P_ADM_FLAGS flags are tied to the page, even through page_loose-alloc.
OTOH mdb_page_split() should only duplicate the relevant flags.

This is just the code for the feature, P_ADM_FLAGS is 0 for now.
We'll need it for P_HIDESPILL later.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

Check with IS_MUTABLE() if an MDB_page is spilled, instead of
searching spill lists.  When unspilling, skip parent spill lists.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

Do not bring in pages merely to see if they should be skipped.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

Mismatch may indicate that pages leaked or got used twice
in the same snapshot.

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

Accept a partial ovpage.  I.e. decryption of the beginning
should not depend on the data at the end.
Make the key and IV less regular. (Divisor 67 has period>64.)

Hallvard Furuseth authored Jul 25, 2017 and Howard Chu committed Oct 10, 2020

...so it would set pgno,txnid in the MDB_dovpage, not the actual ovpage

Still keeping page header at top of overflow page for now

Moving headers outside of overflow page.

Hallvard Furuseth authored Jul 01, 2017 and Howard Chu committed Oct 10, 2020

Now we don't need to tweak the code of callers to test encryption.

Zero out decrypted pages before freeing them.
Do proper init on reused loose pages.

Currently encrypts all but the meta pages
Still needs to store/retrieve the initialization vector

Hallvard Furuseth authored Jul 01, 2017 and Howard Chu committed Oct 10, 2020

Hopefully we'll remember now what goes in which function.

The caller already knows if it's using an overflow page, so
pass the number of expected pages in instead of having to
map the page first and check the count there.

Behavior is controlled by MDB_REMAP_CHUNKS envflag
Remapping is always enabled in MDB_VL32

Separate 32/64 dependency from rpage buffer mechanism

The official macro is __ANDROID__; ANDROID may or may not be defined.

Use the same size dirty list for both 64 and 32 bit.