#define GET_PAGESIZE(x) {SYSTEM_INFO si; GetSystemInfo(&si); (x) = si.dwPageSize;}
#define close(fd) (CloseHandle(fd) ? 0 : -1)
#define munmap(ptr,len) UnmapViewOfFile(ptr)
+#define Z "I"
#else
+#define Z "z"
+
#ifdef MDB_USE_POSIX_SEM
#define LOCK_MUTEX_R(env) mdb_sem_wait((env)->me_rmutex)
*/
#define MDB_MAGIC 0xBEEFC0DE
- /** The version number for a database's file format. */
-#define MDB_VERSION 1
+ /** The version number for a database's datafile format. */
+#define MDB_DATA_VERSION 1
+ /** The version number for a database's lockfile format. */
+#define MDB_LOCK_VERSION 1
/** @brief The maximum size of a key in the database.
*
/** Stamp identifying this as an MDB file. It must be set
* to #MDB_MAGIC. */
uint32_t mtb_magic;
- /** Version number of this lock file. Must be set to #MDB_VERSION. */
+ /** Version number of this lock file. Must be set to #MDB_LOCK_VERSION. */
uint32_t mtb_version;
#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM)
char mtb_rmname[MNAME_LEN];
#define P_DIRTY 0x10 /**< dirty page */
#define P_LEAF2 0x20 /**< for #MDB_DUPFIXED records */
#define P_SUBP 0x40 /**< for #MDB_DUPSORT sub-pages */
+#define P_KEEP 0x8000 /**< leave this page alone during spill */
/** @} */
uint16_t mp_flags; /**< @ref mdb_page */
#define mp_lower mp_pb.pb.pb_lower
/** Stamp identifying this as an MDB file. It must be set
* to #MDB_MAGIC. */
uint32_t mm_magic;
- /** Version number of this lock file. Must be set to #MDB_VERSION. */
+ /** Version number of this lock file. Must be set to #MDB_DATA_VERSION. */
uint32_t mm_version;
void *mm_address; /**< address for fixed mapping */
size_t mm_mapsize; /**< size of mmap region */
/** The list of pages that became unused during this transaction.
*/
MDB_IDL mt_free_pgs;
+ /** The sorted list of dirty pages we temporarily wrote to disk
+ * because the dirty list was full.
+ */
+ MDB_IDL mt_spill_pgs;
union {
- MDB_ID2L dirty_list; /**< for write txns: modified pages */
- MDB_reader *reader; /**< this thread's reader table slot or NULL */
+ /** For write txns: Modified pages. Sorted when not MDB_WRITEMAP. */
+ MDB_ID2L dirty_list;
+ /** For read txns: This thread/txn's reader table slot, or NULL. */
+ MDB_reader *reader;
} mt_u;
/** Array of records for each DB known in the environment. */
MDB_dbx *mt_dbxs;
#define MDB_TXN_RDONLY 0x01 /**< read-only transaction */
#define MDB_TXN_ERROR 0x02 /**< an error has occurred */
#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 */
/** @} */
unsigned int mt_flags; /**< @ref mdb_txn */
/** dirty_list maxsize - # of allocated pages allowed, including in parent txns */
#define MDB_ENV_ACTIVE 0x20000000U
/** me_txkey is set */
#define MDB_ENV_TXKEY 0x10000000U
+ /** Have liveness lock in reader table */
+#define MDB_LIVE_READER 0x08000000U
uint32_t me_flags; /**< @ref mdb_env */
unsigned int me_psize; /**< size of a page, from #GET_PAGESIZE */
unsigned int me_maxreaders; /**< size of the reader table */
/** Max size of a node on a page */
unsigned int me_nodemax;
#ifdef _WIN32
+ int me_pidquery; /**< Used in OpenProcess */
HANDLE me_rmutex; /* Windows mutexes don't reside in shared mem */
HANDLE me_wmutex;
#elif defined(MDB_USE_POSIX_SEM)
DKBUF;
nkeys = NUMKEYS(mp);
- fprintf(stderr, "Page %zu numkeys %d\n", mp->mp_pgno, nkeys);
+ fprintf(stderr, "Page %"Z"u numkeys %d\n", mp->mp_pgno, nkeys);
for (i=0; i<nkeys; i++) {
node = NODEPTR(mp, i);
key.mv_size = node->mn_ksize;
key.mv_data = node->mn_data;
nsize = NODESIZE + NODEKSZ(node) + sizeof(indx_t);
if (IS_BRANCH(mp)) {
- fprintf(stderr, "key %d: page %zu, %s\n", i, NODEPGNO(node),
+ fprintf(stderr, "key %d: page %"Z"u, %s\n", i, NODEPGNO(node),
DKEY(&key));
} else {
if (F_ISSET(node->mn_flags, F_BIGDATA))
return txn->mt_dbxs[dbi].md_dcmp(a, b);
}
-/** Allocate a page.
+/** Allocate memory for a page.
* Re-use old malloc'd pages first for singletons, otherwise just malloc.
*/
static MDB_page *
}
}
-/* Return all dirty pages to dpage list */
+/** Return all dirty pages to dpage list */
static void
mdb_dlist_free(MDB_txn *txn)
{
dl[0].mid = 0;
}
+/* Set or clear P_KEEP in non-overflow, non-sub pages in known cursors.
+ * When clearing, only consider backup cursors (from parent txns) since
+ * other P_KEEP flags have already been cleared.
+ * @param[in] mc A cursor handle for the current operation.
+ * @param[in] pflags Flags of the pages to update:
+ * P_DIRTY to set P_KEEP, P_DIRTY|P_KEEP to clear it.
+ */
+static void
+mdb_cursorpages_mark(MDB_cursor *mc, unsigned pflags)
+{
+ MDB_txn *txn = mc->mc_txn;
+ MDB_cursor *m2, *m3;
+ MDB_xcursor *mx;
+ unsigned i, j;
+
+ if (mc->mc_flags & C_UNTRACK)
+ mc = NULL; /* will find mc in mt_cursors */
+ for (i = txn->mt_numdbs;; mc = txn->mt_cursors[--i]) {
+ for (; mc; mc=mc->mc_next) {
+ m2 = pflags == P_DIRTY ? mc : mc->mc_backup;
+ for (; m2; m2 = m2->mc_backup) {
+ for (m3=m2; m3->mc_flags & C_INITIALIZED; m3=&mx->mx_cursor) {
+ for (j=0; j<m3->mc_snum; j++)
+ if ((m3->mc_pg[j]->mp_flags & (P_SUBP|P_DIRTY|P_KEEP))
+ == pflags)
+ m3->mc_pg[j]->mp_flags ^= P_KEEP;
+ if (!(m3->mc_db->md_flags & MDB_DUPSORT))
+ break;
+ /* Cursor backups have mx malloced at the end of m2 */
+ mx = (m3 == mc ? m3->mc_xcursor : (MDB_xcursor *)(m3+1));
+ }
+ }
+ }
+ if (i == 0)
+ break;
+ }
+}
+
+static int mdb_page_flush(MDB_txn *txn);
+
+/** Spill pages from the dirty list back to disk.
+ * This is intended to prevent running into #MDB_TXN_FULL situations,
+ * but note that they may still occur in a few cases:
+ * 1) pages in #MDB_DUPSORT sub-DBs are never spilled, so if there
+ * are too many of these dirtied in one txn, the txn may still get
+ * too full.
+ * 2) child txns may run out of space if their parents dirtied a
+ * lot of pages and never spilled them. TODO: we probably should do
+ * a preemptive spill during #mdb_txn_begin() of a child txn, if
+ * the parent's dirty_room is below a given threshold.
+ * 3) our estimate of the txn size could be too small. At the
+ * moment this seems unlikely.
+ *
+ * Otherwise, if not using nested txns, it is expected that apps will
+ * not run into #MDB_TXN_FULL any more. The pages are flushed to disk
+ * the same way as for a txn commit, e.g. their P_DIRTY flag is cleared.
+ * If the txn never references them again, they can be left alone.
+ * If the txn only reads them, they can be used without any fuss.
+ * If the txn writes them again, they can be dirtied immediately without
+ * going thru all of the work of #mdb_page_touch(). Such references are
+ * handled by #mdb_page_unspill().
+ *
+ * Also note, we never spill DB root pages, nor pages of active cursors,
+ * because we'll need these back again soon anyway. And in nested txns,
+ * we can't spill a page in a child txn if it was already spilled in a
+ * parent txn. That would alter the parent txns' data even though
+ * the child hasn't committed yet, and we'd have no way to undo it if
+ * the child aborted.
+ *
+ * @param[in] m0 cursor A cursor handle identifying the transaction and
+ * database for which we are checking space.
+ * @param[in] key For a put operation, the key being stored.
+ * @param[in] data For a put operation, the data being stored.
+ * @return 0 on success, non-zero on failure.
+ */
+static int
+mdb_page_spill(MDB_cursor *m0, MDB_val *key, MDB_val *data)
+{
+ MDB_txn *txn = m0->mc_txn;
+ MDB_page *dp;
+ MDB_ID2L dl = txn->mt_u.dirty_list;
+ unsigned int i, j;
+ int rc;
+
+ if (m0->mc_flags & C_SUB)
+ return MDB_SUCCESS;
+
+ /* Estimate how much space this op will take */
+ i = m0->mc_db->md_depth;
+ /* Named DBs also dirty the main DB */
+ if (m0->mc_dbi > MAIN_DBI)
+ i += txn->mt_dbs[MAIN_DBI].md_depth;
+ /* For puts, roughly factor in the key+data size */
+ if (key)
+ i += (LEAFSIZE(key, data) + txn->mt_env->me_psize) / txn->mt_env->me_psize;
+ i += i; /* double it for good measure */
+
+ if (txn->mt_dirty_room > i)
+ return MDB_SUCCESS;
+
+ if (!txn->mt_spill_pgs) {
+ txn->mt_spill_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX);
+ if (!txn->mt_spill_pgs)
+ return ENOMEM;
+ }
+
+ /* Mark all the dirty root pages we want to preserve */
+ for (i=0; i<txn->mt_numdbs; i++) {
+ if (txn->mt_dbflags[i] & DB_DIRTY) {
+ j = mdb_mid2l_search(dl, txn->mt_dbs[i].md_root);
+ if (j <= dl[0].mid) {
+ dp = dl[j].mptr;
+ dp->mp_flags |= P_KEEP;
+ }
+ }
+ }
+
+ /* Preserve pages used by cursors */
+ mdb_cursorpages_mark(m0, P_DIRTY);
+
+ /* Save the page IDs of all the pages we're flushing */
+ for (i=1; i<=dl[0].mid; i++) {
+ dp = dl[i].mptr;
+ if (dp->mp_flags & P_KEEP)
+ continue;
+ /* Can't spill twice, make sure it's not already in a parent's
+ * spill list.
+ */
+ if (txn->mt_parent) {
+ MDB_txn *tx2;
+ for (tx2 = txn->mt_parent; tx2; tx2 = tx2->mt_parent) {
+ if (tx2->mt_spill_pgs) {
+ j = mdb_midl_search(tx2->mt_spill_pgs, dl[i].mid);
+ if (j <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[j] == dl[i].mid) {
+ dp->mp_flags |= P_KEEP;
+ break;
+ }
+ }
+ }
+ if (tx2)
+ continue;
+ }
+ if ((rc = mdb_midl_append(&txn->mt_spill_pgs, dl[i].mid)))
+ return rc;
+ }
+ mdb_midl_sort(txn->mt_spill_pgs);
+
+ rc = mdb_page_flush(txn);
+
+ mdb_cursorpages_mark(m0, P_DIRTY|P_KEEP);
+
+ if (rc == 0) {
+ if (txn->mt_parent) {
+ MDB_txn *tx2;
+ pgno_t pgno = dl[i].mid;
+ txn->mt_dirty_room = txn->mt_parent->mt_dirty_room - dl[0].mid;
+ /* dirty pages that are dirty in an ancestor don't
+ * count against this txn's dirty_room.
+ */
+ for (i=1; i<=dl[0].mid; i++) {
+ for (tx2 = txn->mt_parent; tx2; tx2 = tx2->mt_parent) {
+ j = mdb_mid2l_search(tx2->mt_u.dirty_list, pgno);
+ if (j <= tx2->mt_u.dirty_list[0].mid &&
+ tx2->mt_u.dirty_list[j].mid == pgno) {
+ txn->mt_dirty_room++;
+ break;
+ }
+ }
+ }
+ } else {
+ txn->mt_dirty_room = MDB_IDL_UM_MAX - dl[0].mid;
+ }
+ txn->mt_flags |= MDB_TXN_SPILLS;
+ }
+ return rc;
+}
+
/** Find oldest txnid still referenced. Expects txn->mt_txnid > 0. */
static txnid_t
mdb_find_oldest(MDB_txn *txn)
return oldest;
}
-/** Allocate pages for writing.
+/** Add a page to the txn's dirty list */
+static void
+mdb_page_dirty(MDB_txn *txn, MDB_page *mp)
+{
+ MDB_ID2 mid;
+ int (*insert)(MDB_ID2L, MDB_ID2 *);
+
+ if (txn->mt_env->me_flags & MDB_WRITEMAP) {
+ insert = mdb_mid2l_append;
+ } else {
+ insert = mdb_mid2l_insert;
+ }
+ mid.mid = mp->mp_pgno;
+ mid.mptr = mp;
+ insert(txn->mt_u.dirty_list, &mid);
+ txn->mt_dirty_room--;
+}
+
+/** Allocate page numbers and memory for writing. Maintain me_pglast,
+ * me_pghead and mt_next_pgno.
+ *
* If there are free pages available from older transactions, they
- * will be re-used first. Otherwise a new page will be allocated.
+ * are re-used first. Otherwise allocate a new page at mt_next_pgno.
+ * Do not modify the freedB, just merge freeDB records into me_pghead[]
+ * and move me_pglast to say which records were consumed. Only this
+ * function can create me_pghead and move me_pglast/mt_next_pgno.
* @param[in] mc cursor A cursor handle identifying the transaction and
* database for which we are allocating.
* @param[in] num the number of pages to allocate.
pgno_t pgno, *mop = env->me_pghead;
unsigned i, j, k, mop_len = mop ? mop[0] : 0;
MDB_page *np;
- MDB_ID2 mid;
txnid_t oldest = 0, last;
MDB_cursor_op op;
MDB_cursor m2;
- int (*insert)(MDB_ID2L, MDB_ID2 *);
*mp = NULL;
mdb_cursor_init(&m2, txn, FREE_DBI, NULL);
if (last) {
op = MDB_SET_RANGE;
- key.mv_data = &last; /* will loop up last+1 */
+ key.mv_data = &last; /* will look up last+1 */
key.mv_size = sizeof(last);
}
if (Paranoid && mc->mc_dbi == FREE_DBI)
}
env->me_pglast = last;
#if MDB_DEBUG > 1
- DPRINTF("IDL read txn %zu root %zu num %u",
+ DPRINTF("IDL read txn %"Z"u root %"Z"u num %u",
last, txn->mt_dbs[FREE_DBI].md_root, i);
for (k = i; k; k--)
- DPRINTF("IDL %zu", idl[k]);
+ DPRINTF("IDL %"Z"u", idl[k]);
#endif
/* Merge in descending sorted order */
j = mop_len;
search_done:
if (env->me_flags & MDB_WRITEMAP) {
np = (MDB_page *)(env->me_map + env->me_psize * pgno);
- insert = mdb_mid2l_append;
} else {
if (!(np = mdb_page_malloc(txn, num)))
return ENOMEM;
- insert = mdb_mid2l_insert;
}
if (i) {
mop[0] = mop_len -= num;
} else {
txn->mt_next_pgno = pgno + num;
}
- mid.mid = np->mp_pgno = pgno;
- mid.mptr = np;
- insert(txn->mt_u.dirty_list, &mid);
- txn->mt_dirty_room--;
+ np->mp_pgno = pgno;
+ mdb_page_dirty(txn, np);
*mp = np;
return MDB_SUCCESS;
}
}
+/** Pull a page off the txn's spill list, if present.
+ * If a page being referenced was spilled to disk in this txn, bring
+ * it back and make it dirty/writable again.
+ * @param[in] tx0 the transaction handle.
+ * @param[in] mp the page being referenced.
+ * @param[out] ret the writable page, if any. ret is unchanged if
+ * mp wasn't spilled.
+ */
+static int
+mdb_page_unspill(MDB_txn *tx0, MDB_page *mp, MDB_page **ret)
+{
+ MDB_env *env = tx0->mt_env;
+ MDB_txn *txn;
+ unsigned x;
+ pgno_t pgno = mp->mp_pgno;
+
+ for (txn = tx0; txn; txn=txn->mt_parent) {
+ if (!txn->mt_spill_pgs)
+ continue;
+ x = mdb_midl_search(txn->mt_spill_pgs, pgno);
+ if (x <= txn->mt_spill_pgs[0] && txn->mt_spill_pgs[x] == pgno) {
+ MDB_page *np;
+ int num;
+ if (IS_OVERFLOW(mp))
+ num = mp->mp_pages;
+ else
+ num = 1;
+ if (env->me_flags & MDB_WRITEMAP) {
+ np = mp;
+ } else {
+ np = mdb_page_malloc(txn, num);
+ if (!np)
+ return ENOMEM;
+ if (num > 1)
+ memcpy(np, mp, num * env->me_psize);
+ else
+ mdb_page_copy(np, mp, env->me_psize);
+ }
+ if (txn == tx0) {
+ /* If in current txn, this page is no longer spilled */
+ for (; x < txn->mt_spill_pgs[0]; x++)
+ txn->mt_spill_pgs[x] = txn->mt_spill_pgs[x+1];
+ txn->mt_spill_pgs[0]--;
+ } /* otherwise, if belonging to a parent txn, the
+ * page remains spilled until child commits
+ */
+
+ if (txn->mt_parent) {
+ MDB_txn *tx2;
+ /* If this page is also in a parent's dirty list, then
+ * it's already accounted in dirty_room, and we need to
+ * cancel out the decrement that mdb_page_dirty does.
+ */
+ for (tx2 = txn->mt_parent; tx2; tx2 = tx2->mt_parent) {
+ x = mdb_mid2l_search(tx2->mt_u.dirty_list, pgno);
+ if (x <= tx2->mt_u.dirty_list[0].mid &&
+ tx2->mt_u.dirty_list[x].mid == pgno) {
+ txn->mt_dirty_room++;
+ break;
+ }
+ }
+ }
+ mdb_page_dirty(tx0, np);
+ np->mp_flags |= P_DIRTY;
+ *ret = np;
+ break;
+ }
+ }
+ return MDB_SUCCESS;
+}
+
/** Touch a page: make it dirty and re-insert into tree with updated pgno.
* @param[in] mc cursor pointing to the page to be touched
* @return 0 on success, non-zero on failure.
int rc;
if (!F_ISSET(mp->mp_flags, P_DIRTY)) {
+ if (txn->mt_flags & MDB_TXN_SPILLS) {
+ np = NULL;
+ rc = mdb_page_unspill(txn, mp, &np);
+ if (rc)
+ return rc;
+ if (np)
+ goto done;
+ }
if ((rc = mdb_midl_need(&txn->mt_free_pgs, 1)) ||
(rc = mdb_page_alloc(mc, 1, &np)))
return rc;
pgno = np->mp_pgno;
- DPRINTF("touched db %u page %zu -> %zu", mc->mc_dbi,mp->mp_pgno,pgno);
+ DPRINTF("touched db %u page %"Z"u -> %"Z"u", mc->mc_dbi,mp->mp_pgno,pgno);
assert(mp->mp_pgno != pgno);
mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno);
/* Update the parent page, if any, to point to the new page */
np->mp_pgno = pgno;
np->mp_flags |= P_DIRTY;
+done:
/* Adjust cursors pointing to mp */
mc->mc_pg[mc->mc_top] = np;
dbi = mc->mc_dbi;
}
mc = bk;
}
+ /* Only malloced cursors are permanently tracked. */
free(mc);
}
cursors[i] = NULL;
static void
mdb_txn_reset0(MDB_txn *txn, const char *act);
+#ifdef _WIN32
+enum Pidlock_op {
+ Pidset, Pidcheck
+};
+#else
+enum Pidlock_op {
+ Pidset = F_SETLK, Pidcheck = F_GETLK
+};
+#endif
+
+/** Set or check a pid lock. Set returns 0 on success.
+ * Check returns 0 if lock exists (meaning the process is alive).
+ *
+ * On Windows Pidset is a no-op, we merely check for the existence
+ * of the process with the given pid. On POSIX we use a single byte
+ * lock on the lockfile, set at an offset equal to the pid.
+ */
+static int
+mdb_reader_pid(MDB_env *env, enum Pidlock_op op, pid_t pid)
+{
+#ifdef _WIN32
+ HANDLE h;
+ int ver, query;
+ switch(op) {
+ case Pidset:
+ break;
+ case Pidcheck:
+ h = OpenProcess(env->me_pidquery, FALSE, pid);
+ if (!h)
+ return GetLastError();
+ CloseHandle(h);
+ break;
+ }
+ return 0;
+#else
+ int rc;
+ struct flock lock_info;
+ memset((void *)&lock_info, 0, sizeof(lock_info));
+ lock_info.l_type = F_WRLCK;
+ lock_info.l_whence = SEEK_SET;
+ lock_info.l_start = pid;
+ lock_info.l_len = 1;
+ while ((rc = fcntl(env->me_lfd, op, &lock_info)) &&
+ (rc = ErrCode()) == EINTR) ;
+ if (op == F_GETLK && rc == 0 && lock_info.l_type == F_UNLCK)
+ rc = -1;
+ return rc;
+#endif
+}
+
/** Common code for #mdb_txn_begin() and #mdb_txn_renew().
* @param[in] txn the transaction handle to initialize
* @return 0 on success, non-zero on failure.
pid_t pid = env->me_pid;
pthread_t tid = pthread_self();
+ if (!(env->me_flags & MDB_LIVE_READER)) {
+ rc = mdb_reader_pid(env, Pidset, pid);
+ if (rc) {
+ UNLOCK_MUTEX_R(env);
+ return rc;
+ }
+ env->me_flags |= MDB_LIVE_READER;
+ }
+
LOCK_MUTEX_R(env);
for (i=0; i<env->me_txns->mti_numreaders; i++)
if (env->me_txns->mti_readers[i].mr_pid == 0)
txn->mt_u.dirty_list[0].mid = 0;
txn->mt_free_pgs = env->me_free_pgs;
txn->mt_free_pgs[0] = 0;
+ txn->mt_spill_pgs = NULL;
env->me_txn = txn;
}
rc = mdb_txn_renew0(txn);
if (rc == MDB_SUCCESS) {
- DPRINTF("renew txn %zu%c %p on mdbenv %p, root page %zu",
+ DPRINTF("renew txn %"Z"u%c %p on mdbenv %p, root page %"Z"u",
txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w',
(void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root);
}
txn->mt_toggle = parent->mt_toggle;
txn->mt_dirty_room = parent->mt_dirty_room;
txn->mt_u.dirty_list[0].mid = 0;
+ txn->mt_spill_pgs = NULL;
txn->mt_next_pgno = parent->mt_next_pgno;
parent->mt_child = txn;
txn->mt_parent = parent;
free(txn);
else {
*ret = txn;
- DPRINTF("begin txn %zu%c %p on mdbenv %p, root page %zu",
+ 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',
(void *) txn, (void *) env, txn->mt_dbs[MAIN_DBI].md_root);
}
/** Common code for #mdb_txn_reset() and #mdb_txn_abort().
* May be called twice for readonly txns: First reset it, then abort.
* @param[in] txn the transaction handle to reset
+ * @param[in] act why the transaction is being reset
*/
static void
mdb_txn_reset0(MDB_txn *txn, const char *act)
/* Close any DBI handles opened in this txn */
mdb_dbis_update(txn, 0);
- DPRINTF("%s txn %zu%c %p on mdbenv %p, root page %zu",
+ DPRINTF("%s txn %"Z"u%c %p on mdbenv %p, root page %"Z"u",
act, txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w',
(void *) txn, (void *)env, txn->mt_dbs[MAIN_DBI].md_root);
txn->mt_parent->mt_child = NULL;
env->me_pgstate = ((MDB_ntxn *)txn)->mnt_pgstate;
mdb_midl_free(txn->mt_free_pgs);
+ mdb_midl_free(txn->mt_spill_pgs);
free(txn->mt_u.dirty_list);
return;
}
#if MDB_DEBUG > 1
{
unsigned int i = free_pgs[0];
- DPRINTF("IDL write txn %zu root %zu num %u",
+ DPRINTF("IDL write txn %"Z"u root %"Z"u num %u",
txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i);
for (; i; i--)
- DPRINTF("IDL %zu", free_pgs[i]);
+ DPRINTF("IDL %"Z"u", free_pgs[i]);
}
#endif
continue;
total_room += head_room;
}
- /* Fill in the reserved, touched me_pghead records. Avoid write ops
- * so they cannot rearrange anything, just read the destinations.
- */
+ /* Fill in the reserved, touched me_pghead records */
rc = MDB_SUCCESS;
if (mop_len) {
MDB_val key, data;
- mop += mop_len + 1;
+ mop += mop_len;
rc = mdb_cursor_first(&mc, &key, &data);
for (; !rc; rc = mdb_cursor_next(&mc, &key, &data, MDB_NEXT)) {
- MDB_IDL dest = data.mv_data;
+ unsigned flags = MDB_CURRENT;
+ txnid_t id = *(txnid_t *)key.mv_data;
ssize_t len = (ssize_t)(data.mv_size / sizeof(MDB_ID)) - 1;
+ MDB_ID save;
- assert(len >= 0 && *(txnid_t*)key.mv_data <= env->me_pglast);
- if (len > mop_len)
+ assert(len >= 0 && id <= env->me_pglast);
+ key.mv_data = &id;
+ if (len > mop_len) {
len = mop_len;
- *dest++ = len;
- memcpy(dest, mop -= len, len * sizeof(MDB_ID));
- if (! (mop_len -= len))
+ data.mv_size = (len + 1) * sizeof(MDB_ID);
+ flags = 0;
+ }
+ data.mv_data = mop -= len;
+ save = mop[0];
+ mop[0] = len;
+ rc = mdb_cursor_put(&mc, &key, &data, flags);
+ mop[0] = save;
+ if (rc || !(mop_len -= len))
break;
}
}
{
MDB_env *env = txn->mt_env;
MDB_ID2L dl = txn->mt_u.dirty_list;
- unsigned psize = env->me_psize;
+ unsigned psize = env->me_psize, j;
int i, pagecount = dl[0].mid, rc;
size_t size = 0, pos = 0;
pgno_t pgno = 0;
int n = 0;
#endif
+ j = 0;
if (env->me_flags & MDB_WRITEMAP) {
/* Clear dirty flags */
for (i = pagecount; i; i--) {
dp = dl[i].mptr;
+ /* Don't flush this page yet */
+ if (dp->mp_flags & P_KEEP) {
+ dp->mp_flags ^= P_KEEP;
+ dl[++j] = dl[i];
+ continue;
+ }
dp->mp_flags &= ~P_DIRTY;
}
- dl[0].mid = 0;
+ dl[0].mid = j;
return MDB_SUCCESS;
}
for (i = 1;; i++) {
if (i <= pagecount) {
dp = dl[i].mptr;
+ /* Don't flush this page yet */
+ if (dp->mp_flags & P_KEEP) {
+ dp->mp_flags ^= P_KEEP;
+ dl[i].mid = 0;
+ continue;
+ }
pgno = dl[i].mid;
/* clear dirty flag */
dp->mp_flags &= ~P_DIRTY;
* the write offset, to at least save the overhead of a Seek
* system call.
*/
- DPRINTF("committing page %zu", pgno);
+ DPRINTF("committing page %"Z"u", pgno);
memset(&ov, 0, sizeof(ov));
ov.Offset = pos & 0xffffffff;
ov.OffsetHigh = pos >> 16 >> 16;
wpos = pos;
wsize = 0;
}
- DPRINTF("committing page %zu", pgno);
+ DPRINTF("committing page %"Z"u", pgno);
next_pos = pos + size;
iov[n].iov_len = size;
iov[n].iov_base = (char *)dp;
#endif /* _WIN32 */
}
- mdb_dlist_free(txn);
+ j = 0;
+ for (i=1; i<=pagecount; i++) {
+ dp = dl[i].mptr;
+ /* This is a page we skipped above */
+ if (!dl[i].mid) {
+ dl[++j] = dl[i];
+ dl[j].mid = dp->mp_pgno;
+ continue;
+ }
+ mdb_dpage_free(env, dp);
+ }
+ dl[0].mid = j;
return MDB_SUCCESS;
}
/* Update parent's DB table. */
memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDB_db));
- txn->mt_parent->mt_numdbs = txn->mt_numdbs;
- txn->mt_parent->mt_dbflags[0] = txn->mt_dbflags[0];
- txn->mt_parent->mt_dbflags[1] = txn->mt_dbflags[1];
+ parent->mt_numdbs = txn->mt_numdbs;
+ parent->mt_dbflags[0] = txn->mt_dbflags[0];
+ parent->mt_dbflags[1] = txn->mt_dbflags[1];
for (i=2; i<txn->mt_numdbs; i++) {
/* preserve parent's DB_NEW status */
- x = txn->mt_parent->mt_dbflags[i] & DB_NEW;
- txn->mt_parent->mt_dbflags[i] = txn->mt_dbflags[i] | x;
+ x = parent->mt_dbflags[i] & DB_NEW;
+ parent->mt_dbflags[i] = txn->mt_dbflags[i] | x;
}
- dst = txn->mt_parent->mt_u.dirty_list;
+ dst = parent->mt_u.dirty_list;
src = txn->mt_u.dirty_list;
+ /* Remove anything in our dirty list from parent's spill list */
+ if (parent->mt_spill_pgs) {
+ x = parent->mt_spill_pgs[0];
+ len = x;
+ /* zero out our dirty pages in parent spill list */
+ for (i=1; i<=src[0].mid; i++) {
+ if (src[i].mid < parent->mt_spill_pgs[x])
+ continue;
+ if (src[i].mid > parent->mt_spill_pgs[x]) {
+ if (x <= 1)
+ break;
+ x--;
+ continue;
+ }
+ parent->mt_spill_pgs[x] = 0;
+ len--;
+ }
+ /* OK, we had a few hits, squash zeros from the spill list */
+ if (len < parent->mt_spill_pgs[0]) {
+ x=1;
+ for (y=1; y<=parent->mt_spill_pgs[0]; y++) {
+ if (parent->mt_spill_pgs[y]) {
+ if (y != x) {
+ parent->mt_spill_pgs[x] = parent->mt_spill_pgs[y];
+ }
+ x++;
+ }
+ }
+ parent->mt_spill_pgs[0] = len;
+ }
+ }
/* Find len = length of merging our dirty list with parent's */
x = dst[0].mid;
dst[0].mid = 0; /* simplify loops */
dst[0].mid = len;
free(txn->mt_u.dirty_list);
parent->mt_dirty_room = txn->mt_dirty_room;
+ if (txn->mt_spill_pgs) {
+ if (parent->mt_spill_pgs) {
+ mdb_midl_append_list(&parent->mt_spill_pgs, txn->mt_spill_pgs);
+ mdb_midl_free(txn->mt_spill_pgs);
+ mdb_midl_sort(parent->mt_spill_pgs);
+ } else {
+ parent->mt_spill_pgs = txn->mt_spill_pgs;
+ }
+ }
- txn->mt_parent->mt_child = NULL;
+ parent->mt_child = NULL;
mdb_midl_free(((MDB_ntxn *)txn)->mnt_pgstate.mf_pghead);
free(txn);
return MDB_SUCCESS;
if (!txn->mt_u.dirty_list[0].mid && !(txn->mt_flags & MDB_TXN_DIRTY))
goto done;
- DPRINTF("committing txn %zu %p on mdbenv %p, root page %zu",
+ DPRINTF("committing txn %"Z"u %p on mdbenv %p, root page %"Z"u",
txn->mt_txnid, (void *)txn, (void *)env, txn->mt_dbs[MAIN_DBI].md_root);
/* Update DB root pointers */
memset(&ov, 0, sizeof(ov));
ov.Offset = off;
rc = ReadFile(env->me_fd,&pbuf,MDB_PAGESIZE,&len,&ov) ? (int)len : -1;
+ if (rc == -1 && ErrCode() == ERROR_HANDLE_EOF)
+ rc = 0;
#else
rc = pread(env->me_fd, &pbuf, MDB_PAGESIZE, off);
#endif
p = (MDB_page *)&pbuf;
if (!F_ISSET(p->mp_flags, P_META)) {
- DPRINTF("page %zu not a meta page", p->mp_pgno);
+ DPRINTF("page %"Z"u not a meta page", p->mp_pgno);
return MDB_INVALID;
}
return MDB_INVALID;
}
- if (m->mm_version != MDB_VERSION) {
+ if (m->mm_version != MDB_DATA_VERSION) {
DPRINTF("database is version %u, expected version %u",
- m->mm_version, MDB_VERSION);
+ m->mm_version, MDB_DATA_VERSION);
return MDB_VERSION_MISMATCH;
}
MDB_page *p, *q;
int rc;
unsigned int psize;
+#ifdef _WIN32
+ DWORD len;
+ OVERLAPPED ov;
+ memset(&ov, 0, sizeof(ov));
+#define DO_PWRITE(rc, fd, ptr, size, len, pos) do { \
+ ov.Offset = pos; \
+ rc = WriteFile(fd, ptr, size, &len, &ov); } while(0)
+#else
+ int len;
+#define DO_PWRITE(rc, fd, ptr, size, len, pos) do { \
+ len = pwrite(fd, ptr, size, pos); \
+ rc = (len >= 0); } while(0)
+#endif
DPUTS("writing new meta page");
GET_PAGESIZE(psize);
meta->mm_magic = MDB_MAGIC;
- meta->mm_version = MDB_VERSION;
+ meta->mm_version = MDB_DATA_VERSION;
meta->mm_mapsize = env->me_mapsize;
meta->mm_psize = psize;
meta->mm_last_pg = 1;
q->mp_flags = P_META;
*(MDB_meta *)METADATA(q) = *meta;
-#ifdef _WIN32
- {
- DWORD len;
- OVERLAPPED ov;
- memset(&ov, 0, sizeof(ov));
- rc = WriteFile(env->me_fd, p, psize * 2, &len, &ov);
- rc = rc ? (len == psize * 2 ? MDB_SUCCESS : EIO) : ErrCode();
- }
-#else
- rc = pwrite(env->me_fd, p, psize * 2, 0);
- rc = (rc == (int)psize * 2) ? MDB_SUCCESS : rc < 0 ? ErrCode() : EIO;
-#endif
+ DO_PWRITE(rc, env->me_fd, p, psize * 2, len, 0);
+ if (!rc)
+ rc = ErrCode();
+ else if ((unsigned) len == psize * 2)
+ rc = MDB_SUCCESS;
+ else
+ rc = ENOSPC;
free(p);
return rc;
}
assert(txn->mt_env != NULL);
toggle = !txn->mt_toggle;
- DPRINTF("writing meta page %d for root page %zu",
+ DPRINTF("writing meta page %d for root page %"Z"u",
toggle, txn->mt_dbs[MAIN_DBI].md_root);
env = txn->mt_env;
LONG sizelo, sizehi;
sizelo = env->me_mapsize & 0xffffffff;
sizehi = env->me_mapsize >> 16 >> 16; /* only needed on Win64 */
+
+ /* See if we should use QueryLimited */
+ rc = GetVersion();
+ if ((rc & 0xff) > 5)
+ env->me_pidquery = PROCESS_QUERY_LIMITED_INFORMATION;
+ else
+ env->me_pidquery = PROCESS_QUERY_INFORMATION;
+
/* Windows won't create mappings for zero length files.
* Just allocate the maxsize right now.
*/
env->me_metas[0]->mm_version, env->me_psize);
DPRINTF("using meta page %d", toggle);
DPRINTF("depth: %u", db->md_depth);
- DPRINTF("entries: %zu", db->md_entries);
- DPRINTF("branch pages: %zu", db->md_branch_pages);
- DPRINTF("leaf pages: %zu", db->md_leaf_pages);
- DPRINTF("overflow pages: %zu", db->md_overflow_pages);
- DPRINTF("root: %zu", db->md_root);
+ DPRINTF("entries: %"Z"u", db->md_entries);
+ DPRINTF("branch pages: %"Z"u", db->md_branch_pages);
+ DPRINTF("leaf pages: %"Z"u", db->md_leaf_pages);
+ DPRINTF("overflow pages: %"Z"u", db->md_overflow_pages);
+ DPRINTF("root: %"Z"u", db->md_root);
}
#endif
#define MDB_HASH_INIT ((mdb_hash_t)0xcbf29ce484222325ULL)
/** perform a 64 bit Fowler/Noll/Vo FNV-1a hash on a buffer
- * @param[in] str string to hash
+ * @param[in] val value to hash
* @param[in] hval initial value for hash
* @return 64 bit hash
*
return hval;
}
-/** Hash the string and output the hash in hex.
+/** Hash the string and output the encoded hash.
+ * This uses modified RFC1924 Ascii85 encoding to accommodate systems with
+ * very short name limits. We don't care about the encoding being reversible,
+ * we just want to preserve as many bits of the input as possible in a
+ * small printable string.
* @param[in] str string to hash
- * @param[out] hexbuf an array of 17 chars to hold the hash
+ * @param[out] encbuf an array of 11 chars to hold the hash
*/
+static const char mdb_a85[]= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~";
+
static void
-mdb_hash_hex(MDB_val *val, char *hexbuf)
+mdb_pack85(unsigned long l, char *out)
{
int i;
- mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT);
- for (i=0; i<8; i++) {
- hexbuf += sprintf(hexbuf, "%02x", (unsigned int)h & 0xff);
- h >>= 8;
+
+ for (i=0; i<5; i++) {
+ *out++ = mdb_a85[l % 85];
+ l /= 85;
}
}
+
+static void
+mdb_hash_enc(MDB_val *val, char *encbuf)
+{
+ mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT);
+ unsigned long *l = (unsigned long *)&h;
+
+ mdb_pack85(l[0], encbuf);
+ mdb_pack85(l[1], encbuf+5);
+ encbuf[10] = '\0';
+}
#endif
/** Open and/or initialize the lock region for the environment.
DWORD nlow;
} idbuf;
MDB_val val;
- char hexbuf[17];
+ char encbuf[11];
if (!mdb_sec_inited) {
InitializeSecurityDescriptor(&mdb_null_sd,
idbuf.nlow = stbuf.nFileIndexLow;
val.mv_data = &idbuf;
val.mv_size = sizeof(idbuf);
- mdb_hash_hex(&val, hexbuf);
- sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", hexbuf);
- sprintf(env->me_txns->mti_wmname, "Global\\MDBw%s", hexbuf);
+ mdb_hash_enc(&val, encbuf);
+ sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", encbuf);
+ sprintf(env->me_txns->mti_wmname, "Global\\MDBw%s", encbuf);
env->me_rmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname);
if (!env->me_rmutex) goto fail_errno;
env->me_wmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_wmname);
ino_t ino;
} idbuf;
MDB_val val;
- char hexbuf[17];
+ char encbuf[11];
+#if defined(__NetBSD__)
+#define MDB_SHORT_SEMNAMES 1 /* limited to 14 chars */
+#endif
if (fstat(env->me_lfd, &stbuf)) goto fail_errno;
idbuf.dev = stbuf.st_dev;
idbuf.ino = stbuf.st_ino;
val.mv_data = &idbuf;
val.mv_size = sizeof(idbuf);
- mdb_hash_hex(&val, hexbuf);
- sprintf(env->me_txns->mti_rmname, "/MDBr%s", hexbuf);
- sprintf(env->me_txns->mti_wmname, "/MDBw%s", hexbuf);
+ mdb_hash_enc(&val, encbuf);
+#ifdef MDB_SHORT_SEMNAMES
+ encbuf[9] = '\0'; /* drop name from 15 chars to 14 chars */
+#endif
+ sprintf(env->me_txns->mti_rmname, "/MDBr%s", encbuf);
+ sprintf(env->me_txns->mti_wmname, "/MDBw%s", encbuf);
/* Clean up after a previous run, if needed: Try to
* remove both semaphores before doing anything else.
*/
pthread_mutexattr_destroy(&mattr);
#endif /* _WIN32 || MDB_USE_POSIX_SEM */
- env->me_txns->mti_version = MDB_VERSION;
+ env->me_txns->mti_version = MDB_LOCK_VERSION;
env->me_txns->mti_magic = MDB_MAGIC;
env->me_txns->mti_txnid = 0;
env->me_txns->mti_numreaders = 0;
rc = MDB_INVALID;
goto fail;
}
- if (env->me_txns->mti_version != MDB_VERSION) {
+ if (env->me_txns->mti_version != MDB_LOCK_VERSION) {
DPRINTF("lock region is version %u, expected version %u",
- env->me_txns->mti_version, MDB_VERSION);
+ env->me_txns->mti_version, MDB_LOCK_VERSION);
rc = MDB_VERSION_MISMATCH;
goto fail;
}
int rc;
size_t wsize;
char *ptr;
+#ifdef _WIN32
+ DWORD len, w2;
+#define DO_WRITE(rc, fd, ptr, w2, len) rc = WriteFile(fd, ptr, w2, &len, NULL)
+#else
+ ssize_t len;
+ size_t w2;
+#define DO_WRITE(rc, fd, ptr, w2, len) len = write(fd, ptr, w2); rc = (len >= 0)
+#endif
/* Do the lock/unlock of the reader mutex before starting the
* write txn. Otherwise other read txns could block writers.
}
wsize = env->me_psize * 2;
-#ifdef _WIN32
- {
- DWORD len;
- rc = WriteFile(fd, env->me_map, wsize, &len, NULL);
- rc = rc ? (len == wsize ? MDB_SUCCESS : EIO) : ErrCode();
+ ptr = env->me_map;
+ w2 = wsize;
+ while (w2 > 0) {
+ DO_WRITE(rc, fd, ptr, w2, len);
+ if (!rc) {
+ rc = ErrCode();
+ break;
+ } else if (len > 0) {
+ rc = MDB_SUCCESS;
+ ptr += len;
+ w2 -= len;
+ continue;
+ } else {
+ /* Non-blocking or async handles are not supported */
+ rc = EIO;
+ break;
+ }
}
-#else
- rc = write(fd, env->me_map, wsize);
- rc = rc == (int)wsize ? MDB_SUCCESS : rc < 0 ? ErrCode() : EIO;
-#endif
if (env->me_txns)
UNLOCK_MUTEX_W(env);
if (rc)
goto leave;
- ptr = env->me_map + wsize;
wsize = txn->mt_next_pgno * env->me_psize - wsize;
-#ifdef _WIN32
- while (wsize > 0) {
- DWORD len, w2;
- if (wsize > MAX_WRITE)
- w2 = MAX_WRITE;
- else
- w2 = wsize;
- rc = WriteFile(fd, ptr, w2, &len, NULL);
- rc = rc ? (len == w2 ? MDB_SUCCESS : EIO) : ErrCode();
- if (rc) break;
- wsize -= w2;
- ptr += w2;
- }
-#else
while (wsize > 0) {
- size_t w2;
- ssize_t wres;
if (wsize > MAX_WRITE)
w2 = MAX_WRITE;
else
w2 = wsize;
- wres = write(fd, ptr, w2);
- rc = wres == (ssize_t)w2 ? MDB_SUCCESS : wres < 0 ? ErrCode() : EIO;
- if (rc) break;
- wsize -= wres;
- ptr += wres;
+ DO_WRITE(rc, fd, ptr, w2, len);
+ if (!rc) {
+ rc = ErrCode();
+ break;
+ } else if (len > 0) {
+ rc = MDB_SUCCESS;
+ ptr += len;
+ wsize -= len;
+ continue;
+ } else {
+ rc = EIO;
+ break;
+ }
}
-#endif
leave:
mdb_txn_abort(txn);
{
pgno_t pgno;
COPY_PGNO(pgno, mp->mp_pgno);
- DPRINTF("searching %u keys in %s %spage %zu",
+ DPRINTF("searching %u keys in %s %spage %"Z"u",
nkeys, IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "",
pgno);
}
DPRINTF("found leaf index %u [%s], rc = %i",
i, DKEY(&nodekey), rc);
else
- DPRINTF("found branch index %u [%s -> %zu], rc = %i",
+ DPRINTF("found branch index %u [%s -> %"Z"u], rc = %i",
i, DKEY(&nodekey), NODEPGNO(node), rc);
#endif
if (rc == 0)
if (mc->mc_snum)
mc->mc_top--;
- DPRINTF("popped page %zu off db %u cursor %p", top->mp_pgno,
+ DPRINTF("popped page %"Z"u off db %u cursor %p", top->mp_pgno,
mc->mc_dbi, (void *) mc);
}
}
static int
mdb_cursor_push(MDB_cursor *mc, MDB_page *mp)
{
- DPRINTF("pushing page %zu on db %u cursor %p", mp->mp_pgno,
+ DPRINTF("pushing page %"Z"u on db %u cursor %p", mp->mp_pgno,
mc->mc_dbi, (void *) mc);
if (mc->mc_snum >= CURSOR_STACK) {
level = 1;
do {
MDB_ID2L dl = tx2->mt_u.dirty_list;
+ unsigned x;
+ /* Spilled pages were dirtied in this txn and flushed
+ * because the dirty list got full. Bring this page
+ * back in from the map (but don't unspill it here,
+ * leave that unless page_touch happens again).
+ */
+ if (tx2->mt_spill_pgs) {
+ x = mdb_midl_search(tx2->mt_spill_pgs, pgno);
+ if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pgno) {
+ p = (MDB_page *)(txn->mt_env->me_map + txn->mt_env->me_psize * pgno);
+ goto done;
+ }
+ }
if (dl[0].mid) {
unsigned x = mdb_mid2l_search(dl, pgno);
if (x <= dl[0].mid && dl[x].mid == pgno) {
level = 0;
p = (MDB_page *)(txn->mt_env->me_map + txn->mt_env->me_psize * pgno);
} else {
- DPRINTF("page %zu not found", pgno);
+ DPRINTF("page %"Z"u not found", pgno);
assert(p != NULL);
return MDB_PAGE_NOTFOUND;
}
MDB_node *node;
indx_t i;
- DPRINTF("branch page %zu has %u keys", mp->mp_pgno, NUMKEYS(mp));
+ DPRINTF("branch page %"Z"u has %u keys", mp->mp_pgno, NUMKEYS(mp));
assert(NUMKEYS(mp) > 1);
- DPRINTF("found index 0 to page %zu", NODEPGNO(NODEPTR(mp, 0)));
+ DPRINTF("found index 0 to page %"Z"u", NODEPGNO(NODEPTR(mp, 0)));
if (key == NULL) /* Initialize cursor to first page. */
i = 0;
return MDB_CORRUPTED;
}
- DPRINTF("found leaf page %zu for key [%s]", mp->mp_pgno,
+ DPRINTF("found leaf page %"Z"u for key [%s]", mp->mp_pgno,
key ? DKEY(key) : NULL);
+ mc->mc_flags |= C_INITIALIZED;
+ mc->mc_flags &= ~C_EOF;
return MDB_SUCCESS;
}
mc->mc_snum = 1;
mc->mc_top = 0;
- DPRINTF("db %u root page %zu has flags 0x%X",
+ DPRINTF("db %u root page %"Z"u has flags 0x%X",
mc->mc_dbi, root, mc->mc_pg[0]->mp_flags);
if (flags & MDB_PS_MODIFY) {
MDB_env *env = txn->mt_env;
int rc;
- DPRINTF("free ov page %zu (%d)", pg, ovpages);
- /* If the page is dirty we just acquired it, so we should
- * give it back to our current free list, if any.
+ DPRINTF("free ov page %"Z"u (%d)", pg, ovpages);
+ /* If the page is dirty or on the spill list we just acquired it,
+ * so we should give it back to our current free list, if any.
* Not currently supported in nested txns.
* Otherwise put it onto the list of pages we freed in this txn.
*/
+ if (!(mp->mp_flags & P_DIRTY) && txn->mt_spill_pgs) {
+ unsigned x = mdb_midl_search(txn->mt_spill_pgs, pg);
+ if (x <= txn->mt_spill_pgs[0] && txn->mt_spill_pgs[x] == pg) {
+ /* This page is no longer spilled */
+ for (; x < txn->mt_spill_pgs[0]; x++)
+ txn->mt_spill_pgs[x] = txn->mt_spill_pgs[x+1];
+ txn->mt_spill_pgs[0]--;
+ goto release;
+ }
+ }
if ((mp->mp_flags & P_DIRTY) && !txn->mt_parent && env->me_pghead) {
unsigned j, x;
pgno_t *mop;
}
if (!(env->me_flags & MDB_WRITEMAP))
mdb_dpage_free(env, mp);
+release:
/* Insert in me_pghead */
mop = env->me_pghead;
j = mop[0] + ovpages;
data->mv_size = NODEDSZ(leaf);
memcpy(&pgno, NODEDATA(leaf), sizeof(pgno));
if ((rc = mdb_page_get(txn, pgno, &omp, NULL)) != 0) {
- DPRINTF("read overflow page %zu failed", pgno);
+ DPRINTF("read overflow page %"Z"u failed", pgno);
return rc;
}
data->mv_data = METADATA(omp);
}
mdb_cursor_pop(mc);
- DPRINTF("parent page is page %zu, index %u",
+ DPRINTF("parent page is page %"Z"u, index %u",
mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top]);
if (move_right ? (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mc->mc_pg[mc->mc_top]))
return rc;
}
} else {
- mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
if (op == MDB_NEXT_DUP)
return MDB_NOTFOUND;
}
}
- DPRINTF("cursor_next: top page is %zu in cursor %p", mp->mp_pgno, (void *) mc);
+ DPRINTF("cursor_next: top page is %"Z"u in cursor %p", mp->mp_pgno, (void *) mc);
if (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mp)) {
DPUTS("=====> move to next sibling page");
if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) {
mc->mc_flags |= C_EOF;
- mc->mc_flags &= ~C_INITIALIZED;
return rc;
}
mp = mc->mc_pg[mc->mc_top];
- DPRINTF("next page is %zu, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]);
+ DPRINTF("next page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]);
} else
mc->mc_ki[mc->mc_top]++;
- DPRINTF("==> cursor points to page %zu with %u keys, key index %u",
+ DPRINTF("==> cursor points to page %"Z"u with %u keys, key index %u",
mp->mp_pgno, NUMKEYS(mp), mc->mc_ki[mc->mc_top]);
if (IS_LEAF2(mp)) {
if (op != MDB_PREV || rc != MDB_NOTFOUND)
return rc;
} else {
- mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
if (op == MDB_PREV_DUP)
return MDB_NOTFOUND;
}
}
}
- DPRINTF("cursor_prev: top page is %zu in cursor %p", mp->mp_pgno, (void *) mc);
+ DPRINTF("cursor_prev: top page is %"Z"u in cursor %p", mp->mp_pgno, (void *) mc);
if (mc->mc_ki[mc->mc_top] == 0) {
DPUTS("=====> move to prev sibling page");
if ((rc = mdb_cursor_sibling(mc, 0)) != MDB_SUCCESS) {
- mc->mc_flags &= ~C_INITIALIZED;
return rc;
}
mp = mc->mc_pg[mc->mc_top];
mc->mc_ki[mc->mc_top] = NUMKEYS(mp) - 1;
- DPRINTF("prev page is %zu, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]);
+ DPRINTF("prev page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]);
} else
mc->mc_ki[mc->mc_top]--;
mc->mc_flags &= ~C_EOF;
- DPRINTF("==> cursor points to page %zu with %u keys, key index %u",
+ DPRINTF("==> cursor points to page %"Z"u with %u keys, key index %u",
mp->mp_pgno, NUMKEYS(mp), mc->mc_ki[mc->mc_top]);
if (IS_LEAF2(mp)) {
assert(key);
assert(key->mv_size > 0);
+ if (mc->mc_xcursor)
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
+
/* See if we're already on the right page */
if (mc->mc_flags & C_INITIALIZED) {
MDB_val nodekey;
} else {
if (mc->mc_xcursor)
- mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS)
return rc;
}
int rc;
MDB_node *leaf;
+ if (mc->mc_xcursor)
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
+
if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) {
rc = mdb_page_search(mc, NULL, 0);
if (rc != MDB_SUCCESS)
if (rc)
return rc;
} else {
- if (mc->mc_xcursor)
- mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS)
return rc;
}
int rc;
MDB_node *leaf;
+ if (mc->mc_xcursor)
+ mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
+
if (!(mc->mc_flags & C_EOF)) {
if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) {
if (rc)
return rc;
} else {
- if (mc->mc_xcursor)
- mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS)
return rc;
}
return MDB_SUCCESS;
}
+/** Do not spill pages to disk if txn is getting full, may fail instead */
+#define MDB_NOSPILL 0x8000
+
int
mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
unsigned int flags)
{
+ enum { MDB_NO_ROOT = MDB_LAST_ERRCODE+10 }; /* internal code */
MDB_node *leaf = NULL;
MDB_val xdata, *rdata, dkey;
MDB_page *fp;
MDB_db dummy;
int do_sub = 0, insert = 0;
- unsigned int mcount = 0, dcount = 0;
+ unsigned int mcount = 0, dcount = 0, nospill;
size_t nsize;
int rc, rc2;
MDB_pagebuf pbuf;
return EINVAL;
}
+ nospill = flags & MDB_NOSPILL;
+ flags &= ~MDB_NOSPILL;
+
if (F_ISSET(mc->mc_txn->mt_flags, MDB_TXN_RDONLY))
return EACCES;
return EINVAL;
#endif
- DPRINTF("==> put db %u key [%s], size %zu, data size %zu",
+ DPRINTF("==> put db %u key [%s], size %"Z"u, data size %"Z"u",
mc->mc_dbi, DKEY(key), key ? key->mv_size:0, data->mv_size);
dkey.mv_size = 0;
return EINVAL;
rc = MDB_SUCCESS;
} else if (mc->mc_db->md_root == P_INVALID) {
- MDB_page *np;
- /* new database, write a root leaf page */
- DPUTS("allocating new root leaf page");
- if ((rc = mdb_page_new(mc, P_LEAF, 1, &np))) {
- return rc;
- }
+ /* new database, cursor has nothing to point to */
mc->mc_snum = 0;
- mdb_cursor_push(mc, np);
- mc->mc_db->md_root = np->mp_pgno;
- mc->mc_db->md_depth++;
- *mc->mc_dbflag |= DB_DIRTY;
- if ((mc->mc_db->md_flags & (MDB_DUPSORT|MDB_DUPFIXED))
- == MDB_DUPFIXED)
- np->mp_flags |= P_LEAF2;
- mc->mc_flags |= C_INITIALIZED;
- rc = MDB_NOTFOUND;
- goto top;
+ mc->mc_flags &= ~C_INITIALIZED;
+ rc = MDB_NO_ROOT;
} else {
int exact = 0;
MDB_val d2;
}
}
} else {
- rc = mdb_cursor_set(mc, key, &d2, MDB_SET, &exact);
+ rc = mdb_cursor_set(mc, key, &d2, MDB_SET, &exact);
}
if ((flags & MDB_NOOVERWRITE) && rc == 0) {
DPRINTF("duplicate key [%s]", DKEY(key));
return rc;
}
- /* Cursor is positioned, now make sure all pages are writable */
- rc2 = mdb_cursor_touch(mc);
- if (rc2)
- return rc2;
+ /* Cursor is positioned, check for room in the dirty list */
+ if (!nospill) {
+ if (flags & MDB_MULTIPLE) {
+ rdata = &xdata;
+ xdata.mv_size = data->mv_size * dcount;
+ } else {
+ rdata = data;
+ }
+ if ((rc2 = mdb_page_spill(mc, key, rdata)))
+ return rc2;
+ }
+
+ if (rc == MDB_NO_ROOT) {
+ MDB_page *np;
+ /* new database, write a root leaf page */
+ DPUTS("allocating new root leaf page");
+ if ((rc2 = mdb_page_new(mc, P_LEAF, 1, &np))) {
+ return rc2;
+ }
+ mdb_cursor_push(mc, np);
+ mc->mc_db->md_root = np->mp_pgno;
+ mc->mc_db->md_depth++;
+ *mc->mc_dbflag |= DB_DIRTY;
+ if ((mc->mc_db->md_flags & (MDB_DUPSORT|MDB_DUPFIXED))
+ == MDB_DUPFIXED)
+ np->mp_flags |= P_LEAF2;
+ mc->mc_flags |= C_INITIALIZED;
+ } else {
+ /* make sure all cursor pages are writable */
+ rc2 = mdb_cursor_touch(mc);
+ if (rc2)
+ return rc2;
+ }
-top:
/* The key already exists */
if (rc == MDB_SUCCESS) {
/* there's only a key anyway, so this is a no-op */
return rc2;
ovpages = omp->mp_pages;
- /* Is the ov page writable and large enough? */
- if ((omp->mp_flags & P_DIRTY) && ovpages >= dpages) {
+ /* Is the ov page large enough? */
+ if (ovpages >= dpages) {
+ if (!(omp->mp_flags & P_DIRTY) &&
+ (level || (mc->mc_txn->mt_env->me_flags & MDB_WRITEMAP)))
+ {
+ rc = mdb_page_unspill(mc->mc_txn, omp, &omp);
+ if (rc)
+ return rc;
+ level = 0; /* dirty in this txn or clean */
+ }
+ /* Is it dirty? */
+ if (omp->mp_flags & P_DIRTY) {
/* yes, overwrite it. Note in this case we don't
* bother to try shrinking the page if the new data
* is smaller than the overflow threshold.
else
memcpy(METADATA(omp), data->mv_data, data->mv_size);
goto done;
- } else {
- if ((rc2 = mdb_ovpage_free(mc, omp)) != MDB_SUCCESS)
- return rc2;
+ }
}
+ if ((rc2 = mdb_ovpage_free(mc, omp)) != MDB_SUCCESS)
+ return rc2;
} else if (NODEDSZ(leaf) == data->mv_size) {
/* same size, just replace it. Note that we could
* also reuse this node if the new data is smaller,
xdata.mv_data = "";
leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
if (flags & MDB_CURRENT) {
- xflags = MDB_CURRENT;
+ xflags = MDB_CURRENT|MDB_NOSPILL;
} else {
mdb_xcursor_init1(mc, leaf);
- xflags = (flags & MDB_NODUPDATA) ? MDB_NOOVERWRITE : 0;
+ xflags = (flags & MDB_NODUPDATA) ?
+ MDB_NOOVERWRITE|MDB_NOSPILL : MDB_NOSPILL;
}
/* converted, write the original data first */
if (dkey.mv_size) {
for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) {
if (m2 == mc || m2->mc_snum < mc->mc_snum) continue;
+ if (!(m2->mc_flags & C_INITIALIZED)) continue;
if (m2->mc_pg[i] == mp && m2->mc_ki[i] == mc->mc_ki[i]) {
mdb_xcursor_init1(m2, leaf);
}
if (!(mc->mc_flags & C_INITIALIZED))
return EINVAL;
+ if (!(flags & MDB_NOSPILL) && (rc = mdb_page_spill(mc, NULL, NULL)))
+ return rc;
+ flags &= ~MDB_NOSPILL; /* TODO: Or change (flags != MDB_NODUPDATA) to ~(flags & MDB_NODUPDATA), not looking at the logic of that code just now */
+
rc = mdb_cursor_touch(mc);
if (rc)
return rc;
if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) {
mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
}
- rc = mdb_cursor_del(&mc->mc_xcursor->mx_cursor, 0);
+ rc = mdb_cursor_del(&mc->mc_xcursor->mx_cursor, MDB_NOSPILL);
/* If sub-DB still has entries, we're done */
if (mc->mc_xcursor->mx_db.md_entries) {
if (leaf->mn_flags & F_SUBDATA) {
if ((rc = mdb_page_alloc(mc, num, &np)))
return rc;
- DPRINTF("allocated new mpage %zu, page size %u",
+ 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;
assert(mp->mp_upper >= mp->mp_lower);
- DPRINTF("add to %s %spage %zu index %i, data size %zu key size %zu [%s]",
+ DPRINTF("add to %s %spage %"Z"u index %i, data size %"Z"u key size %"Z"u [%s]",
IS_LEAF(mp) ? "leaf" : "branch",
IS_SUBP(mp) ? "sub-" : "",
mp->mp_pgno, indx, data ? data->mv_size : 0,
int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize);
int rc;
/* Put data on overflow page. */
- DPRINTF("data size is %zu, node would be %zu, put data on overflow page",
+ DPRINTF("data size is %"Z"u, node would be %"Z"u, put data on overflow page",
data->mv_size, node_size+data->mv_size);
node_size += sizeof(pgno_t);
if ((rc = mdb_page_new(mc, P_OVERFLOW, ovpages, &ofp)))
return rc;
- DPRINTF("allocated overflow page %zu", ofp->mp_pgno);
+ DPRINTF("allocated overflow page %"Z"u", ofp->mp_pgno);
flags |= F_BIGDATA;
} else {
node_size += data->mv_size;
node_size += node_size & 1;
if (node_size + sizeof(indx_t) > SIZELEFT(mp)) {
- DPRINTF("not enough room in page %zu, got %u ptrs",
+ DPRINTF("not enough room in page %"Z"u, got %u ptrs",
mp->mp_pgno, NUMKEYS(mp));
DPRINTF("upper - lower = %u - %u = %u", mp->mp_upper, mp->mp_lower,
mp->mp_upper - mp->mp_lower);
- DPRINTF("node size = %zu", node_size);
+ DPRINTF("node size = %"Z"u", node_size);
return MDB_PAGE_FULL;
}
{
pgno_t pgno;
COPY_PGNO(pgno, mp->mp_pgno);
- DPRINTF("delete node %u on %s page %zu", indx,
+ DPRINTF("delete node %u on %s page %"Z"u", indx,
IS_LEAF(mp) ? "leaf" : "branch", pgno);
}
#endif
mx->mx_db.md_flags |= MDB_INTEGERKEY;
}
}
- DPRINTF("Sub-db %u for db %u root page %zu", mx->mx_cursor.mc_dbi, mc->mc_dbi,
+ DPRINTF("Sub-db %u for db %u root page %"Z"u", mx->mx_cursor.mc_dbi, mc->mc_dbi,
mx->mx_db.md_root);
mx->mx_dbflag = DB_VALID | (F_ISSET(mc->mc_pg[mc->mc_top]->mp_flags, P_DIRTY) ?
DB_DIRTY : 0);
static void
mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx)
{
+ mc->mc_next = NULL;
mc->mc_backup = NULL;
mc->mc_dbi = dbi;
mc->mc_txn = txn;
char kbuf2[(MDB_MAXKEYSIZE*2+1)];
k2.mv_data = NODEKEY(node);
k2.mv_size = node->mn_ksize;
- DPRINTF("update key %u (ofs %u) [%s] to [%s] on page %zu",
+ DPRINTF("update key %u (ofs %u) [%s] to [%s] on page %"Z"u",
indx, ptr,
mdb_dkey(&k2, kbuf2),
DKEY(key),
return rc;
}
- DPRINTF("moving %s node %u [%s] on page %zu to node %u on page %zu",
+ DPRINTF("moving %s node %u [%s] on page %"Z"u to node %u on page %"Z"u",
IS_LEAF(csrc->mc_pg[csrc->mc_top]) ? "leaf" : "branch",
csrc->mc_ki[csrc->mc_top],
DKEY(&key),
key.mv_size = NODEKSZ(srcnode);
key.mv_data = NODEKEY(srcnode);
}
- DPRINTF("update separator for source page %zu to [%s]",
+ DPRINTF("update separator for source page %"Z"u to [%s]",
csrc->mc_pg[csrc->mc_top]->mp_pgno, DKEY(&key));
mdb_cursor_copy(csrc, &mn);
mn.mc_snum--;
key.mv_size = NODEKSZ(srcnode);
key.mv_data = NODEKEY(srcnode);
}
- DPRINTF("update separator for destination page %zu to [%s]",
+ DPRINTF("update separator for destination page %"Z"u to [%s]",
cdst->mc_pg[cdst->mc_top]->mp_pgno, DKEY(&key));
mdb_cursor_copy(cdst, &mn);
mn.mc_snum--;
MDB_val key, data;
unsigned nkeys;
- DPRINTF("merging page %zu into %zu", csrc->mc_pg[csrc->mc_top]->mp_pgno,
+ DPRINTF("merging page %"Z"u into %"Z"u", csrc->mc_pg[csrc->mc_top]->mp_pgno,
cdst->mc_pg[cdst->mc_top]->mp_pgno);
assert(csrc->mc_snum > 1); /* can't merge root page */
}
}
- DPRINTF("dst page %zu now has %u keys (%.1f%% filled)",
+ DPRINTF("dst page %"Z"u now has %u keys (%.1f%% filled)",
cdst->mc_pg[cdst->mc_top]->mp_pgno, NUMKEYS(cdst->mc_pg[cdst->mc_top]), (float)PAGEFILL(cdst->mc_txn->mt_env, cdst->mc_pg[cdst->mc_top]) / 10);
/* Unlink the src page from parent and add to free list.
{
pgno_t pgno;
COPY_PGNO(pgno, mc->mc_pg[mc->mc_top]->mp_pgno);
- DPRINTF("rebalancing %s page %zu (has %u keys, %.1f%% full)",
+ DPRINTF("rebalancing %s page %"Z"u (has %u keys, %.1f%% full)",
IS_LEAF(mc->mc_pg[mc->mc_top]) ? "leaf" : "branch",
pgno, NUMKEYS(mc->mc_pg[mc->mc_top]), (float)PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) / 10);
}
#if MDB_DEBUG
pgno_t pgno;
COPY_PGNO(pgno, mc->mc_pg[mc->mc_top]->mp_pgno);
- DPRINTF("no need to rebalance page %zu, above fill threshold",
+ DPRINTF("no need to rebalance page %"Z"u, above fill threshold",
pgno);
#endif
return MDB_SUCCESS;
return rc;
mc->mc_db->md_depth--;
mc->mc_db->md_branch_pages--;
+ mc->mc_ki[0] = mc->mc_ki[1];
{
/* Adjust other cursors pointing to mp */
MDB_cursor *m2, *m3;
m3->mc_pg[0] = mc->mc_pg[0];
m3->mc_snum = 1;
m3->mc_top = 0;
+ m3->mc_ki[0] = m3->mc_ki[1];
}
}
}
mc->mc_ki[mc->mc_top] = 0;
}
- DPRINTF("found neighbor page %zu (%u keys, %.1f%% full)",
+ DPRINTF("found neighbor page %"Z"u (%u keys, %.1f%% full)",
mn.mc_pg[mn.mc_top]->mp_pgno, NUMKEYS(mn.mc_pg[mn.mc_top]), (float)PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) / 10);
/* If the neighbor page is above threshold and has enough keys,
rc = mdb_page_merge(&mn, mc);
else
rc = mdb_page_merge(mc, &mn);
- mc->mc_flags &= ~C_INITIALIZED;
+ mc->mc_flags &= ~(C_INITIALIZED|C_EOF);
}
return rc;
}
mdb_cursor_del0(MDB_cursor *mc, MDB_node *leaf)
{
int rc;
+ MDB_page *mp;
+ indx_t ki;
+
+ mp = mc->mc_pg[mc->mc_top];
+ ki = mc->mc_ki[mc->mc_top];
/* add overflow pages to free list */
- if (!IS_LEAF2(mc->mc_pg[mc->mc_top]) && F_ISSET(leaf->mn_flags, F_BIGDATA)) {
+ if (!IS_LEAF2(mp) && F_ISSET(leaf->mn_flags, F_BIGDATA)) {
MDB_page *omp;
pgno_t pg;
(rc = mdb_ovpage_free(mc, omp)))
return rc;
}
- mdb_node_del(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], mc->mc_db->md_pad);
+ mdb_node_del(mp, ki, mc->mc_db->md_pad);
mc->mc_db->md_entries--;
rc = mdb_rebalance(mc);
if (rc != MDB_SUCCESS)
mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
/* if mc points past last node in page, invalidate */
else if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mc->mc_pg[mc->mc_top]))
- mc->mc_flags &= ~C_INITIALIZED;
+ mc->mc_flags &= ~(C_INITIALIZED|C_EOF);
+
+ {
+ /* Adjust other cursors pointing to mp */
+ MDB_cursor *m2;
+ unsigned int nkeys;
+ MDB_dbi dbi = mc->mc_dbi;
+
+ mp = mc->mc_pg[mc->mc_top];
+ nkeys = NUMKEYS(mp);
+ for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
+ if (m2 == mc)
+ continue;
+ if (!(m2->mc_flags & C_INITIALIZED))
+ continue;
+ if (m2->mc_pg[mc->mc_top] == mp) {
+ if (m2->mc_ki[mc->mc_top] > ki)
+ m2->mc_ki[mc->mc_top]--;
+ if (m2->mc_ki[mc->mc_top] >= nkeys)
+ m2->mc_flags &= ~(C_INITIALIZED|C_EOF);
+ }
+ }
+ }
return rc;
}
* run out of space, triggering a split. We need this
* cursor to be consistent until the end of the rebalance.
*/
+ mc.mc_flags |= C_UNTRACK;
mc.mc_next = txn->mt_cursors[dbi];
txn->mt_cursors[dbi] = &mc;
rc = mdb_cursor_del(&mc, data ? 0 : MDB_NODUPDATA);
mp = mc->mc_pg[mc->mc_top];
newindx = mc->mc_ki[mc->mc_top];
- DPRINTF("-----> splitting %s page %zu and adding [%s] at index %i",
+ DPRINTF("-----> splitting %s page %"Z"u and adding [%s] at index %i",
IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno,
DKEY(newkey), mc->mc_ki[mc->mc_top]);
/* Create a right sibling. */
if ((rc = mdb_page_new(mc, mp->mp_flags, 1, &rp)))
return rc;
- DPRINTF("new right sibling: page %zu", rp->mp_pgno);
+ DPRINTF("new right sibling: page %"Z"u", rp->mp_pgno);
if (mc->mc_snum < 2) {
if ((rc = mdb_page_new(mc, P_BRANCH, 1, &pp)))
mc->mc_pg[0] = pp;
mc->mc_ki[0] = 0;
mc->mc_db->md_root = pp->mp_pgno;
- DPRINTF("root split! new root = %zu", pp->mp_pgno);
+ DPRINTF("root split! new root = %"Z"u", pp->mp_pgno);
mc->mc_db->md_depth++;
new_root = 1;
ptop = 0;
} else {
ptop = mc->mc_top-1;
- DPRINTF("parent branch page is %zu", mc->mc_pg[ptop]->mp_pgno);
+ DPRINTF("parent branch page is %"Z"u", mc->mc_pg[ptop]->mp_pgno);
}
mc->mc_flags |= C_SPLITTING;
m3 = m2;
if (m3 == mc)
continue;
- if (!(m3->mc_flags & C_INITIALIZED))
+ if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED))
continue;
if (m3->mc_flags & C_SPLITTING)
continue;
arg->me_mapaddr = (env->me_flags & MDB_FIXEDMAP) ? env->me_map : 0;
arg->me_mapsize = env->me_mapsize;
arg->me_maxreaders = env->me_maxreaders;
- arg->me_numreaders = env->me_numreaders;
+
+ /* me_numreaders may be zero if this process never used any readers. Use
+ * the shared numreader count if it exists.
+ */
+ arg->me_numreaders = env->me_txns ? env->me_txns->mti_numreaders : env->me_numreaders;
+
arg->me_last_pgno = env->me_metas[toggle]->mm_last_pg;
arg->me_last_txnid = env->me_metas[toggle]->mm_txnid;
return MDB_SUCCESS;
free(ptr);
}
+int mdb_dbi_flags(MDB_env *env, MDB_dbi dbi, unsigned int *flags)
+{
+ /* We could return the flags for the FREE_DBI too but what's the point? */
+ if (dbi <= MAIN_DBI || dbi >= env->me_numdbs)
+ return EINVAL;
+ *flags = env->me_dbflags[dbi];
+ return MDB_SUCCESS;
+}
+
/** Add all the DB's pages to the free list.
* @param[in] mc Cursor on the DB to free.
* @param[in] subs non-Zero to check for sub-DBs in this DB.
rc = mdb_drop0(mc, mc->mc_db->md_flags & MDB_DUPSORT);
/* Invalidate the dropped DB's cursors */
for (m2 = txn->mt_cursors[dbi]; m2; m2 = m2->mc_next)
- m2->mc_flags &= ~C_INITIALIZED;
+ m2->mc_flags &= ~(C_INITIALIZED|C_EOF);
if (rc)
goto leave;
return MDB_SUCCESS;
}
+int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
+{
+ unsigned int i, rdrs;
+ MDB_reader *mr;
+ char buf[64];
+ int first = 1;
+
+ if (!env || !func)
+ return -1;
+ if (!env->me_txns) {
+ return func("(no reader locks)\n", ctx);
+ }
+ rdrs = env->me_txns->mti_numreaders;
+ mr = env->me_txns->mti_readers;
+ for (i=0; i<rdrs; i++) {
+ if (mr[i].mr_pid) {
+ size_t tid;
+ int rc;
+ tid = mr[i].mr_tid;
+ if (mr[i].mr_txnid == (txnid_t)-1) {
+ sprintf(buf, "%10d %"Z"x -\n", mr[i].mr_pid, tid);
+ } else {
+ sprintf(buf, "%10d %"Z"x %"Z"u\n", mr[i].mr_pid, tid, mr[i].mr_txnid);
+ }
+ if (first) {
+ first = 0;
+ func(" pid thread txnid\n", ctx);
+ }
+ rc = func(buf, ctx);
+ if (rc < 0)
+ return rc;
+ }
+ }
+ if (first) {
+ func("(no active readers)\n", ctx);
+ }
+ return 0;
+}
+
+/* insert pid into list if not already present.
+ * return -1 if already present.
+ */
+static int mdb_pid_insert(pid_t *ids, pid_t pid)
+{
+ /* binary search of pid in list */
+ unsigned base = 0;
+ unsigned cursor = 1;
+ int val = 0;
+ unsigned n = ids[0];
+
+ while( 0 < n ) {
+ unsigned pivot = n >> 1;
+ cursor = base + pivot + 1;
+ val = pid - ids[cursor];
+
+ if( val < 0 ) {
+ n = pivot;
+
+ } else if ( val > 0 ) {
+ base = cursor;
+ n -= pivot + 1;
+
+ } else {
+ /* found, so it's a duplicate */
+ return -1;
+ }
+ }
+
+ if( val > 0 ) {
+ ++cursor;
+ }
+ ids[0]++;
+ for (n = ids[0]; n > cursor; n--)
+ ids[n] = ids[n-1];
+ ids[n] = pid;
+ return 0;
+}
+
+int mdb_reader_check(MDB_env *env, int *dead)
+{
+ unsigned int i, j, rdrs;
+ MDB_reader *mr;
+ pid_t *pids, pid;
+ int count = 0;
+
+ if (!env)
+ return EINVAL;
+ if (dead)
+ *dead = 0;
+ if (!env->me_txns)
+ return MDB_SUCCESS;
+ rdrs = env->me_txns->mti_numreaders;
+ pids = malloc((rdrs+1) * sizeof(pid_t));
+ if (!pids)
+ return ENOMEM;
+ pids[0] = 0;
+ mr = env->me_txns->mti_readers;
+ j = 0;
+ for (i=0; i<rdrs; i++) {
+ if (mr[i].mr_pid && mr[i].mr_pid != env->me_pid) {
+ pid = mr[i].mr_pid;
+ if (mdb_pid_insert(pids, pid) == 0) {
+ if (mdb_reader_pid(env, Pidcheck, pid)) {
+ LOCK_MUTEX_R(env);
+ if (mdb_reader_pid(env, Pidcheck, pid)) {
+ for (j=i; j<rdrs; j++)
+ if (mr[j].mr_pid == pid) {
+ mr[j].mr_pid = 0;
+ count++;
+ }
+ }
+ UNLOCK_MUTEX_R(env);
+ }
+ }
+ }
+ }
+ free(pids);
+ if (dead)
+ *dead = count;
+ return MDB_SUCCESS;
+}
/** @} */
projects / openldap / blobdiff