NextGraph
/
lmdb
mirror of https://github.com/nextgraph-org/lmdb.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ITS#7713 handle 65536 byte page size

Browse Source 
Fix mp_lower/mp_upper to exclude PAGEHDRSZ, which means our
max mp_upper is now pagesize - PAGEHDRSZ and won't overflow.
Currently must define MDB_DEVEL to use. Will be default for
LMDB 1.0/OpenLDAP 2.5
robust
Howard Chu 11 years ago
parent 534dcc7212
commit 68e6faad5c
1 changed files with 31 additions and 22 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 53
      libraries/liblmdb/mdb.c

53
libraries/liblmdb/mdb.c
Unescape View File

@ -693,8 +693,17 @@ typedef struct MDB_page {
/** Address of first usable data byte in a page, after the header */
#define METADATA(p) ((void *)((char *)(p) + PAGEHDRSZ))
/** ITS#7713, change PAGEBASE to handle 65536 byte pages */
#ifdef MDB_DEVEL
#define MP_LOBASE 0
#define MP_HIBASE PAGEHDRSZ
#else
#define MP_LOBASE PAGEHDRSZ
#define MP_HIBASE 0
#endif
/** Number of nodes on a page */
#define NUMKEYS(p) (((p)->mp_lower - PAGEHDRSZ) >> 1)
#define NUMKEYS(p) (((p)->mp_lower - MP_LOBASE) >> 1)
/** The amount of space remaining in the page */
#define SIZELEFT(p) (indx_t)((p)->mp_upper - (p)->mp_lower)
@ -775,7 +784,7 @@ typedef struct MDB_node {
#define LEAFSIZE(k, d) (NODESIZE + (k)->mv_size + (d)->mv_size)
/** Address of node \b i in page \b p */
#define NODEPTR(p, i) ((MDB_node *)((char *)(p) + (p)->mp_ptrs[i]))
#define NODEPTR(p, i) ((MDB_node *)((char *)(p) + (p)->mp_ptrs[i] + MP_HIBASE))
/** Address of the key for the node */
#define NODEKEY(node) (void *)((node)->mn_data)
@ -1385,7 +1394,7 @@ mdb_page_list(MDB_page *mp)
total = EVEN(total);
}
fprintf(stderr, "Total: header %d + contents %d + unused %d\n",
IS_LEAF2(mp) ? PAGEHDRSZ : mp->mp_lower, total, SIZELEFT(mp));
IS_LEAF2(mp) ? PAGEHDRSZ : MP_HIBASE + mp->mp_lower, total, SIZELEFT(mp));
}
void
@ -2040,9 +2049,9 @@ mdb_page_copy(MDB_page *dst, MDB_page *src, unsigned int psize)
*/
if ((unused &= -Align) && !IS_LEAF2(src)) {
upper &= -Align;
memcpy(dst, src, (lower + (Align-1)) & -Align);
memcpy((pgno_t *)((char *)dst+upper), (pgno_t *)((char *)src+upper),
psize - upper);
memcpy(dst, src, (lower + MP_HIBASE + (Align-1)) & -Align);
memcpy((pgno_t *)((char *)dst+upper+MP_HIBASE), (pgno_t *)((char *)src+upper+MP_HIBASE),
psize - upper - MP_HIBASE);
} else {
memcpy(dst, src, psize - unused);
}
@ -5936,7 +5945,7 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
fp_flags = P_LEAF|P_DIRTY;
fp = env->me_pbuf;
fp->mp_pad = data->mv_size; /* used if MDB_DUPFIXED */
fp->mp_lower = fp->mp_upper = olddata.mv_size = PAGEHDRSZ;
fp->mp_lower = fp->mp_upper = olddata.mv_size = MP_LOBASE;
goto prep_subDB;
}
} else {
@ -5991,7 +6000,7 @@ more:
/* Make sub-page header for the dup items, with dummy body */
fp->mp_flags = P_LEAF|P_DIRTY|P_SUBP;
fp->mp_lower = PAGEHDRSZ;
fp->mp_lower = MP_LOBASE;
xdata.mv_size = PAGEHDRSZ + dkey.mv_size + data->mv_size;
if (mc->mc_db->md_flags & MDB_DUPFIXED) {
fp->mp_flags |= P_LEAF2;
@ -6001,8 +6010,8 @@ more:
xdata.mv_size += 2 * (sizeof(indx_t) + NODESIZE) +
(dkey.mv_size & 1) + (data->mv_size & 1);
}
fp->mp_upper = xdata.mv_size;
olddata.mv_size = fp->mp_upper; /* pretend olddata is fp */
fp->mp_upper = xdata.mv_size - MP_HIBASE;
olddata.mv_size = xdata.mv_size; /* pretend olddata is fp */
} else if (leaf->mn_flags & F_SUBDATA) {
/* Data is on sub-DB, just store it */
flags |= F_DUPDATA|F_SUBDATA;
@ -6069,7 +6078,7 @@ prep_subDB:
if (fp_flags & P_LEAF2) {
memcpy(METADATA(mp), METADATA(fp), NUMKEYS(fp) * fp->mp_pad);
} else {
memcpy((char *)mp + mp->mp_upper, (char *)fp + fp->mp_upper,
memcpy((char *)mp + mp->mp_upper + MP_HIBASE, (char *)fp + fp->mp_upper + MP_HIBASE,
olddata.mv_size - fp->mp_upper);
for (i=0; i<NUMKEYS(fp); i++)
mp->mp_ptrs[i] = fp->mp_ptrs[i] + offset;
@ -6392,8 +6401,8 @@ mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp)
DPRINTF(("allocated new mpage %"Z"u, page size %u",
np->mp_pgno, mc->mc_txn->mt_env->me_psize));
np->mp_flags = flags | P_DIRTY;
np->mp_lower = PAGEHDRSZ;
np->mp_upper = mc->mc_txn->mt_env->me_psize;
np->mp_lower = MP_LOBASE;
np->mp_upper = mc->mc_txn->mt_env->me_psize - MP_HIBASE;
if (IS_BRANCH(np))
mc->mc_db->md_branch_pages++;
@ -6646,7 +6655,7 @@ mdb_node_del(MDB_cursor *mc, int ksize)
}
}
base = (char *)mp + mp->mp_upper;
base = (char *)mp + mp->mp_upper + MP_HIBASE;
memmove(base + sz, base, ptr - mp->mp_upper);
mp->mp_lower -= sizeof(indx_t);
@ -6700,7 +6709,7 @@ mdb_node_shrink(MDB_page *mp, indx_t indx)
mp->mp_ptrs[i] += delta;
}
base = (char *)mp + mp->mp_upper;
base = (char *)mp + mp->mp_upper + MP_HIBASE;
memmove(base + delta, base, ptr - mp->mp_upper + NODESIZE + NODEKSZ(node));
mp->mp_upper += delta;
}
@ -6972,7 +6981,7 @@ mdb_update_key(MDB_cursor *mc, MDB_val *key)
mp->mp_ptrs[i] -= delta;
}
base = (char *)mp + mp->mp_upper;
base = (char *)mp + mp->mp_upper + MP_HIBASE;
len = ptr - mp->mp_upper + NODESIZE;
memmove(base - delta, base, len);
mp->mp_upper -= delta;
@ -7763,8 +7772,8 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
}
copy->mp_pgno = mp->mp_pgno;
copy->mp_flags = mp->mp_flags;
copy->mp_lower = PAGEHDRSZ;
copy->mp_upper = env->me_psize;
copy->mp_lower = MP_LOBASE;
copy->mp_upper = env->me_psize - MP_HIBASE;
/* prepare to insert */
for (i=0, j=0; i<nkeys; i++) {
@ -7804,7 +7813,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
psize += nsize;
node = NULL;
} else {
node = (MDB_node *)((char *)mp + copy->mp_ptrs[i]);
node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + MP_HIBASE);
psize += NODESIZE + NODEKSZ(node) + sizeof(indx_t);
if (IS_LEAF(mp)) {
if (F_ISSET(node->mn_flags, F_BIGDATA))
@ -7824,7 +7833,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
sepkey.mv_size = newkey->mv_size;
sepkey.mv_data = newkey->mv_data;
} else {
node = (MDB_node *)((char *)mp + copy->mp_ptrs[split_indx]);
node = (MDB_node *)((char *)mp + copy->mp_ptrs[split_indx] + MP_HIBASE);
sepkey.mv_size = node->mn_ksize;
sepkey.mv_data = NODEKEY(node);
}
@ -7905,7 +7914,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
/* Update index for the new key. */
mc->mc_ki[mc->mc_top] = j;
} else {
node = (MDB_node *)((char *)mp + copy->mp_ptrs[i]);
node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + MP_HIBASE);
rkey.mv_data = NODEKEY(node);
rkey.mv_size = node->mn_ksize;
if (IS_LEAF(mp)) {
@ -7941,7 +7950,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
mp->mp_lower = copy->mp_lower;
mp->mp_upper = copy->mp_upper;
memcpy(NODEPTR(mp, nkeys-1), NODEPTR(copy, nkeys-1),
env->me_psize - copy->mp_upper);
env->me_psize - copy->mp_upper - MP_HIBASE);
/* reset back to original page */
if (newindx < split_indx) {

Write Preview
Loading…
Cancel
Save