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mdbx: backport - Refix root split check from 5da67968afb599697d7557c13b65fb961ec408dd.

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Change-Id: If012ddcf223a3312bbe13c4b24d776b488ed3772
This commit is contained in:
Howard Chu 2015-11-20 09:20:16 +00:00 committed by Leo Yuriev
parent 6ba0b8b467
commit 90fdef7a6a
1 changed files with 4 additions and 9 deletions
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13
mdb.c
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@ -8611,6 +8611,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
/* Copy separator key to the parent.
*/
if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(env, &sepkey)) {
int snum = mc->mc_snum;
mn.mc_snum--;
mn.mc_top--;
did_split = 1;
@ -8619,13 +8620,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
goto done;
/* root split? */
if (mn.mc_snum == mc->mc_snum) {
mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top];
mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top];
mc->mc_pg[mc->mc_top] = mc->mc_pg[ptop];
mc->mc_ki[mc->mc_top] = mc->mc_ki[ptop];
mc->mc_snum++;
mc->mc_top++;
if (mc->mc_snum > snum) {
ptop++;
}
/* Right page might now have changed parent.
@ -8756,8 +8751,6 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
continue;
if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED))
continue;
if (m3->mc_flags & C_SPLITTING)
continue;
if (new_root) {
int k;
/* root split */
@ -8774,6 +8767,8 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
m3->mc_snum++;
m3->mc_top++;
}
if (m3->mc_flags & C_SPLITTING)
continue;
if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) {
if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE))
m3->mc_ki[mc->mc_top]++;