From 46e3f46e764ccd58cc1d323d25527a0928d8afcf Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Mon, 23 Nov 2015 16:58:57 +0000
Subject: [PATCH] ITS#8321 More cursor fixup
Based on page_touch fixup from ITS#7594 but expanded:
make sure sub-cursors agree with main cursors.
---
libraries/liblmdb/mdb.c | 45 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 42 insertions(+), 3 deletions(-)
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 22c5d30186..3e87ea4126 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -1613,6 +1613,13 @@ mdb_cursor_chk(MDB_cursor *mc)
}
if (mc->mc_ki[i] >= NUMKEYS(mc->mc_pg[i]))
printf("ack!\n");
+ if (mc->mc_xcursor && (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
+ node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
+ if (((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) &&
+ mc->mc_xcursor->mx_cursor.mc_pg[0] != NODEDATA(node)) {
+ printf("blah!\n");
+ }
+ }
}
#endif
@@ -2423,10 +2430,10 @@ done:
m2->mc_pg[mc->mc_top] = np;
if ((mc->mc_db->md_flags & MDB_DUPSORT) &&
IS_LEAF(np) &&
- m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top])
+ (m2->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))
{
- MDB_node *leaf = NODEPTR(np, mc->mc_ki[mc->mc_top]);
- if (!(leaf->mn_flags & F_SUBDATA))
+ MDB_node *leaf = NODEPTR(np, m2->mc_ki[mc->mc_top]);
+ if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
}
}
@@ -7623,6 +7630,7 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft)
data.mv_size = NODEDSZ(srcnode);
data.mv_data = NODEDATA(srcnode);
}
+ mn.mc_xcursor = NULL;
if (IS_BRANCH(cdst->mc_pg[cdst->mc_top]) && cdst->mc_ki[cdst->mc_top] == 0) {
unsigned int snum = cdst->mc_snum;
MDB_node *s2;
@@ -7694,6 +7702,12 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft)
m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top];
m3->mc_ki[csrc->mc_top-1]++;
}
+ if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
+ IS_LEAF(mps)) {
+ MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ }
}
} else
/* Adding on the right, bump others down */
@@ -7714,6 +7728,12 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft)
} else {
m3->mc_ki[csrc->mc_top]--;
}
+ if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
+ IS_LEAF(mps)) {
+ MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ }
}
}
}
@@ -7838,6 +7858,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
MDB_cursor mn;
MDB_node *s2;
mdb_cursor_copy(csrc, &mn);
+ mn.mc_xcursor = NULL;
/* must find the lowest key below src */
rc = mdb_page_search_lowest(&mn);
if (rc)
@@ -7913,6 +7934,12 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
m3->mc_ki[top-1] > csrc->mc_ki[top-1]) {
m3->mc_ki[top-1]--;
}
+ if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
+ IS_LEAF(psrc)) {
+ MDB_node *node = NODEPTR(m3->mc_pg[top], m3->mc_ki[top]);
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ }
}
}
{
@@ -8171,6 +8198,11 @@ mdb_cursor_del0(MDB_cursor *mc)
else if (mc->mc_db->md_flags & MDB_DUPSORT)
m3->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
}
+ if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
+ MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ }
}
}
}
@@ -8353,6 +8385,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
}
mdb_cursor_copy(mc, &mn);
+ mn.mc_xcursor = NULL;
mn.mc_pg[mn.mc_top] = rp;
mn.mc_ki[ptop] = mc->mc_ki[ptop]+1;
@@ -8683,6 +8716,12 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
m3->mc_ki[ptop] >= mc->mc_ki[ptop]) {
m3->mc_ki[ptop]++;
}
+ if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
+ IS_LEAF(mp)) {
+ MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ }
}
}
DPRINTF(("mp left: %d, rp left: %d", SIZELEFT(mp), SIZELEFT(rp)));
--
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