From c0170bc0ec987e82f57298ad88ebbe2e9a300130 Mon Sep 17 00:00:00 2001 From: Hallvard Furuseth Date: Wed, 8 Apr 2015 21:51:50 +0200 Subject: [PATCH] Copy some env flags to txn. Factor out flags. Taken from mdb_txn_begin(,,MDB_NOMETASYNC, MDB_NOSYNC,,) without adding those two flags yet, to align with mdb.master: Part of 54516639acab87aad156230f8a799e9128d266fe (Renumber...) + 8adee9464f65d1702b81a7c604f1a48baa7a0ad5 (Fix per-txn...). --- libraries/liblmdb/mdb.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-) diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 67e0e19..2444d23 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -1016,7 +1016,11 @@ struct MDB_txn { * @ingroup internal * @{ */ -#define MDB_TXN_RDONLY 0x01 /**< read-only transaction */ + /** #mdb_txn_begin() flags */ +#define MDB_TXN_BEGIN_FLAGS MDB_RDONLY +#define MDB_TXN_RDONLY MDB_RDONLY /**< read-only transaction */ + /* internal txn flags */ +#define MDB_TXN_WRITEMAP MDB_WRITEMAP /**< copy of #MDB_env flag in writers */ #define MDB_TXN_ERROR 0x02 /**< txn is unusable after an error */ #define MDB_TXN_DIRTY 0x04 /**< must write, even if dirty list is empty */ #define MDB_TXN_SPILLS 0x08 /**< txn or a parent has spilled pages */ @@ -1942,7 +1946,7 @@ mdb_page_dirty(MDB_txn *txn, MDB_page *mp) MDB_ID2 mid; int rc, (*insert)(MDB_ID2L, MDB_ID2 *); - if (txn->mt_env->me_flags & MDB_WRITEMAP) { + if (txn->mt_flags & MDB_TXN_WRITEMAP) { insert = mdb_mid2l_append; } else { insert = mdb_mid2l_insert; @@ -2662,18 +2666,20 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) MDB_ntxn *ntxn; int rc, size, tsize = sizeof(MDB_txn); + flags &= MDB_TXN_BEGIN_FLAGS; + flags |= env->me_flags & MDB_WRITEMAP; + if (env->me_flags & MDB_FATAL_ERROR) { DPUTS("environment had fatal error, must shutdown!"); return MDB_PANIC; } - if ((env->me_flags & MDB_RDONLY) && !(flags & MDB_RDONLY)) + if (env->me_flags & MDB_RDONLY & ~flags) /* write txn in RDONLY env */ return EACCES; if (parent) { /* Nested transactions: Max 1 child, write txns only, no writemap */ + flags |= parent->mt_flags; if (parent->mt_child || - (flags & MDB_RDONLY) || - (parent->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) || - (env->me_flags & MDB_WRITEMAP)) + (flags & (MDB_RDONLY|MDB_WRITEMAP|MDB_TXN_ERROR))) { return (parent->mt_flags & MDB_TXN_RDONLY) ? EINVAL : MDB_BAD_TXN; } @@ -2696,7 +2702,6 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) } txn->mt_dbs = (MDB_db *) ((char *)txn + tsize); if (flags & MDB_RDONLY) { - txn->mt_flags |= MDB_TXN_RDONLY; txn->mt_dbflags = (unsigned char *)(txn->mt_dbs + env->me_maxdbs); txn->mt_dbiseqs = env->me_dbiseqs; } else { @@ -2709,6 +2714,7 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs); } } + txn->mt_flags = flags; txn->mt_env = env; ok: @@ -2730,7 +2736,6 @@ ok: parent->mt_child = txn; txn->mt_parent = parent; txn->mt_numdbs = parent->mt_numdbs; - txn->mt_flags = parent->mt_flags; txn->mt_dbxs = parent->mt_dbxs; memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDB_db)); /* Copy parent's mt_dbflags, but clear DB_NEW */ @@ -2758,9 +2763,10 @@ ok: if (txn != env->me_txn0) free(txn); } else { + txn->mt_flags |= flags; /* for txn==me_txn0, no effect otherwise */ *ret = txn; DPRINTF(("begin txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', + txn->mt_txnid, (flags & MDB_RDONLY) ? 'r' : 'w', (void *) txn, (void *) env, txn->mt_dbs[MAIN_DBI].md_root)); } @@ -3606,6 +3612,7 @@ mdb_env_write_meta(MDB_txn *txn) { MDB_env *env; MDB_meta meta, metab, *mp; + unsigned flags; size_t mapsize; off_t off; int rc, len, toggle; @@ -3622,19 +3629,20 @@ mdb_env_write_meta(MDB_txn *txn) toggle, txn->mt_dbs[MAIN_DBI].md_root)); env = txn->mt_env; + flags = env->me_flags; mp = env->me_metas[toggle]; mapsize = env->me_metas[toggle ^ 1]->mm_mapsize; /* Persist any increases of mapsize config */ if (mapsize < env->me_mapsize) mapsize = env->me_mapsize; - if (env->me_flags & MDB_WRITEMAP) { + if (flags & MDB_WRITEMAP) { mp->mm_mapsize = mapsize; mp->mm_dbs[0] = txn->mt_dbs[0]; mp->mm_dbs[1] = txn->mt_dbs[1]; mp->mm_last_pg = txn->mt_next_pgno - 1; mp->mm_txnid = txn->mt_txnid; - if (!(env->me_flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { + if (!(flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { unsigned meta_size = env->me_psize; rc = (env->me_flags & MDB_MAPASYNC) ? MS_ASYNC : MS_SYNC; ptr = env->me_map; @@ -3670,8 +3678,7 @@ mdb_env_write_meta(MDB_txn *txn) off += PAGEHDRSZ; /* Write to the SYNC fd */ - mfd = env->me_flags & (MDB_NOSYNC|MDB_NOMETASYNC) ? - env->me_fd : env->me_mfd; + mfd = (flags & (MDB_NOSYNC|MDB_NOMETASYNC)) ? env->me_fd : env->me_mfd; #ifdef _WIN32 { memset(&ov, 0, sizeof(ov)); @@ -5081,7 +5088,7 @@ mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **ret, int *lvl) MDB_page *p = NULL; int level; - if (!((txn->mt_flags & MDB_TXN_RDONLY) | (env->me_flags & MDB_WRITEMAP))) { + if (! (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_WRITEMAP))) { MDB_txn *tx2 = txn; level = 1; do {