return tdb->transaction->io_methods->tdb_read(tdb, off, buf, len, cv);
fail:
- TDB_LOG((tdb, 0, "transaction_read: failed at off=%d len=%d\n", off, len));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "transaction_read: failed at off=%d len=%d\n", off, len));
tdb->ecode = TDB_ERR_IO;
tdb->transaction->transaction_error = 1;
return -1;
static int transaction_write(struct tdb_context *tdb, tdb_off_t off,
const void *buf, tdb_len_t len)
{
- struct tdb_transaction_el *el;
+ struct tdb_transaction_el *el, *best_el=NULL;
if (len == 0) {
return 0;
for (el=tdb->transaction->elements_last;el;el=el->prev) {
tdb_len_t partial;
+ if (best_el == NULL && off == el->offset+el->length) {
+ best_el = el;
+ }
+
if (off+len <= el->offset) {
continue;
}
return 0;
}
+ /* see if we can append the new entry to an existing entry */
+ if (best_el && best_el->offset + best_el->length == off &&
+ (off+len < tdb->transaction->old_map_size ||
+ off > tdb->transaction->old_map_size)) {
+ unsigned char *data = best_el->data;
+ el = best_el;
+ el->data = realloc(el->data, el->length + len);
+ if (el->data == NULL) {
+ tdb->ecode = TDB_ERR_OOM;
+ tdb->transaction->transaction_error = 1;
+ el->data = data;
+ return -1;
+ }
+ if (buf) {
+ memcpy(el->data + el->length, buf, len);
+ } else {
+ memset(el->data + el->length, TDB_PAD_BYTE, len);
+ }
+ el->length += len;
+ return 0;
+ }
+
/* add a new entry at the end of the list */
el = malloc(sizeof(*el));
if (el == NULL) {
return 0;
fail:
- TDB_LOG((tdb, 0, "transaction_write: failed at off=%d len=%d\n", off, len));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "transaction_write: failed at off=%d len=%d\n", off, len));
tdb->ecode = TDB_ERR_IO;
tdb->transaction->transaction_error = 1;
return -1;
brlock during a transaction - ignore them
*/
int transaction_brlock(struct tdb_context *tdb, tdb_off_t offset,
- int rw_type, int lck_type, int probe)
+ int rw_type, int lck_type, int probe, size_t len)
{
return 0;
}
{
/* some sanity checks */
if (tdb->read_only || (tdb->flags & TDB_INTERNAL) || tdb->traverse_read) {
- TDB_LOG((tdb, 0, "tdb_transaction_start: cannot start a transaction on a read-only or internal db\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: cannot start a transaction on a read-only or internal db\n"));
tdb->ecode = TDB_ERR_EINVAL;
return -1;
}
/* cope with nested tdb_transaction_start() calls */
if (tdb->transaction != NULL) {
tdb->transaction->nesting++;
- TDB_LOG((tdb, 0, "tdb_transaction_start: nesting %d\n",
+ TDB_LOG((tdb, TDB_DEBUG_TRACE, "tdb_transaction_start: nesting %d\n",
tdb->transaction->nesting));
return 0;
}
- if (tdb->num_locks != 0) {
+ if (tdb->num_locks != 0 || tdb->global_lock.count) {
/* the caller must not have any locks when starting a
transaction as otherwise we'll be screwed by lack
of nested locks in posix */
- TDB_LOG((tdb, 0, "tdb_transaction_start: cannot start a transaction with locks held\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: cannot start a transaction with locks held\n"));
tdb->ecode = TDB_ERR_LOCK;
return -1;
}
/* you cannot use transactions inside a traverse (although you can use
traverse inside a transaction) as otherwise you can end up with
deadlock */
- TDB_LOG((tdb, 0, "tdb_transaction_start: cannot start a transaction within a traverse\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: cannot start a transaction within a traverse\n"));
tdb->ecode = TDB_ERR_LOCK;
return -1;
}
/* get the transaction write lock. This is a blocking lock. As
discussed with Volker, there are a number of ways we could
make this async, which we will probably do in the future */
- if (tdb_brlock_len(tdb, TRANSACTION_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_start: failed to get transaction lock\n"));
+ if (tdb_brlock(tdb, TRANSACTION_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: failed to get transaction lock\n"));
tdb->ecode = TDB_ERR_LOCK;
SAFE_FREE(tdb->transaction);
return -1;
/* get a read lock from the freelist to the end of file. This
is upgraded to a write lock during the commit */
- if (tdb_brlock_len(tdb, FREELIST_TOP, F_RDLCK, F_SETLKW, 0, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_start: failed to get hash locks\n"));
+ if (tdb_brlock(tdb, FREELIST_TOP, F_RDLCK, F_SETLKW, 0, 0) == -1) {
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: failed to get hash locks\n"));
tdb->ecode = TDB_ERR_LOCK;
goto fail;
}
}
if (tdb->methods->tdb_read(tdb, FREELIST_TOP, tdb->transaction->hash_heads,
TDB_HASHTABLE_SIZE(tdb), 0) != 0) {
- TDB_LOG((tdb, 0, "tdb_transaction_start: failed to read hash heads\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_start: failed to read hash heads\n"));
tdb->ecode = TDB_ERR_IO;
goto fail;
}
tdb->transaction->io_methods = tdb->methods;
tdb->methods = &transaction_methods;
+ /* by calling this transaction write here, we ensure that we don't grow the
+ transaction linked list due to hash table updates */
+ if (transaction_write(tdb, FREELIST_TOP, tdb->transaction->hash_heads,
+ TDB_HASHTABLE_SIZE(tdb)) != 0) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_start: failed to prime hash table\n"));
+ tdb->ecode = TDB_ERR_IO;
+ goto fail;
+ }
+
return 0;
fail:
- tdb_brlock_len(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
- tdb_brlock_len(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
+ tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
SAFE_FREE(tdb->transaction->hash_heads);
SAFE_FREE(tdb->transaction);
return -1;
int tdb_transaction_cancel(struct tdb_context *tdb)
{
if (tdb->transaction == NULL) {
- TDB_LOG((tdb, 0, "tdb_transaction_cancel: no transaction\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_cancel: no transaction\n"));
return -1;
}
free(el);
}
+ /* remove any global lock created during the transaction */
+ if (tdb->global_lock.count != 0) {
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 4*tdb->header.hash_size);
+ tdb->global_lock.count = 0;
+ }
+
/* remove any locks created during the transaction */
if (tdb->num_locks != 0) {
int h;
for (h=0;h<tdb->header.hash_size+1;h++) {
if (tdb->locked[h].count != 0) {
- tdb_brlock_len(tdb,FREELIST_TOP+4*h,F_UNLCK,F_SETLKW, 0, 1);
+ tdb_brlock(tdb,FREELIST_TOP+4*h,F_UNLCK,F_SETLKW, 0, 1);
tdb->locked[h].count = 0;
}
}
/* restore the normal io methods */
tdb->methods = tdb->transaction->io_methods;
- tdb_brlock_len(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
- tdb_brlock_len(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
+ tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
SAFE_FREE(tdb->transaction->hash_heads);
SAFE_FREE(tdb->transaction);
{
if (fsync(tdb->fd) != 0) {
tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0, "tdb_transaction: fsync failed\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction: fsync failed\n"));
return -1;
}
#ifdef MS_SYNC
if (msync(moffset + (char *)tdb->map_ptr,
length + (offset - moffset), MS_SYNC) != 0) {
tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0, "tdb_transaction: msync failed\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction: msync failed - %s\n",
+ strerror(errno)));
return -1;
}
}
tdb_off_t recovery_head;
if (tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &recovery_head) == -1) {
- TDB_LOG((tdb, 0, "tdb_recovery_allocate: failed to read recovery head\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_recovery_allocate: failed to read recovery head\n"));
return -1;
}
if (recovery_head != 0 &&
methods->tdb_read(tdb, recovery_head, &rec, sizeof(rec), DOCONV()) == -1) {
- TDB_LOG((tdb, 0, "tdb_recovery_allocate: failed to read recovery record\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_recovery_allocate: failed to read recovery record\n"));
return -1;
}
the transaction) */
if (recovery_head != 0) {
if (tdb_free(tdb, recovery_head, &rec) == -1) {
- TDB_LOG((tdb, 0, "tdb_recovery_allocate: failed to free previous recovery area\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_recovery_allocate: failed to free previous recovery area\n"));
return -1;
}
}
if (methods->tdb_expand_file(tdb, tdb->transaction->old_map_size,
(tdb->map_size - tdb->transaction->old_map_size) +
sizeof(rec) + *recovery_max_size) == -1) {
- TDB_LOG((tdb, 0, "tdb_recovery_allocate: failed to create recovery area\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_recovery_allocate: failed to create recovery area\n"));
return -1;
}
CONVERT(recovery_head);
if (methods->tdb_write(tdb, TDB_RECOVERY_HEAD,
&recovery_head, sizeof(tdb_off_t)) == -1) {
- TDB_LOG((tdb, 0, "tdb_recovery_allocate: failed to write recovery head\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_recovery_allocate: failed to write recovery head\n"));
return -1;
}
continue;
}
if (el->offset + el->length > tdb->transaction->old_map_size) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: transaction data over new region boundary\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_setup_recovery: transaction data over new region boundary\n"));
free(data);
tdb->ecode = TDB_ERR_CORRUPT;
return -1;
/* write the recovery data to the recovery area */
if (methods->tdb_write(tdb, recovery_offset, data, sizeof(*rec) + recovery_size) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: failed to write recovery data\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_setup_recovery: failed to write recovery data\n"));
free(data);
tdb->ecode = TDB_ERR_IO;
return -1;
*magic_offset = recovery_offset + offsetof(struct list_struct, magic);
if (methods->tdb_write(tdb, *magic_offset, &magic, sizeof(magic)) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: failed to write recovery magic\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_setup_recovery: failed to write recovery magic\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
u32 zero = 0;
if (tdb->transaction == NULL) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: no transaction\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: no transaction\n"));
return -1;
}
if (tdb->transaction->transaction_error) {
tdb->ecode = TDB_ERR_IO;
tdb_transaction_cancel(tdb);
- TDB_LOG((tdb, 0, "tdb_transaction_commit: transaction error pending\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: transaction error pending\n"));
return -1;
}
/* if there are any locks pending then the caller has not
nested their locks properly, so fail the transaction */
- if (tdb->num_locks) {
+ if (tdb->num_locks || tdb->global_lock.count) {
tdb->ecode = TDB_ERR_LOCK;
- TDB_LOG((tdb, 0, "tdb_transaction_commit: locks pending on commit\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: locks pending on commit\n"));
tdb_transaction_cancel(tdb);
return -1;
}
/* upgrade the main transaction lock region to a write lock */
if (tdb_brlock_upgrade(tdb, FREELIST_TOP, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_start: failed to upgrade hash locks\n"));
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: failed to upgrade hash locks\n"));
tdb->ecode = TDB_ERR_LOCK;
tdb_transaction_cancel(tdb);
return -1;
/* get the global lock - this prevents new users attaching to the database
during the commit */
- if (tdb_brlock_len(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: failed to get global lock\n"));
+ if (tdb_brlock(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: failed to get global lock\n"));
tdb->ecode = TDB_ERR_LOCK;
tdb_transaction_cancel(tdb);
return -1;
if (!(tdb->flags & TDB_NOSYNC)) {
/* write the recovery data to the end of the file */
if (transaction_setup_recovery(tdb, &magic_offset) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: failed to setup recovery data\n"));
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: failed to setup recovery data\n"));
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
tdb_transaction_cancel(tdb);
return -1;
}
tdb->map_size -
tdb->transaction->old_map_size) == -1) {
tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0, "tdb_transaction_commit: expansion failed\n"));
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: expansion failed\n"));
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
tdb_transaction_cancel(tdb);
return -1;
}
struct tdb_transaction_el *el = tdb->transaction->elements;
if (methods->tdb_write(tdb, el->offset, el->data, el->length) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: write failed during commit\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: write failed during commit\n"));
/* we've overwritten part of the data and
possibly expanded the file, so we need to
tdb_transaction_recover(tdb);
tdb_transaction_cancel(tdb);
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
- TDB_LOG((tdb, 0, "tdb_transaction_commit: write failed\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: write failed\n"));
return -1;
}
tdb->transaction->elements = el->next;
/* remove the recovery marker */
if (methods->tdb_write(tdb, magic_offset, &zero, 4) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_commit: failed to remove recovery magic\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: failed to remove recovery magic\n"));
return -1;
}
}
}
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+
+ /*
+ TODO: maybe write to some dummy hdr field, or write to magic
+ offset without mmap, before the last sync, instead of the
+ utime() call
+ */
/* on some systems (like Linux 2.6.x) changes via mmap/msync
don't change the mtime of the file, this means the file may
/* find the recovery area */
if (tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &recovery_head) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to read recovery head\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to read recovery head\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
/* read the recovery record */
if (tdb->methods->tdb_read(tdb, recovery_head, &rec,
sizeof(rec), DOCONV()) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to read recovery record\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to read recovery record\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
}
if (tdb->read_only) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: attempt to recover read only database\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: attempt to recover read only database\n"));
tdb->ecode = TDB_ERR_CORRUPT;
return -1;
}
data = malloc(rec.data_len);
if (data == NULL) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to allocate recovery data\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to allocate recovery data\n"));
tdb->ecode = TDB_ERR_OOM;
return -1;
}
/* read the full recovery data */
if (tdb->methods->tdb_read(tdb, recovery_head + sizeof(rec), data,
rec.data_len, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to read recovery data\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to read recovery data\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
if (tdb->methods->tdb_write(tdb, ofs, p+8, len) == -1) {
free(data);
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to recover %d bytes at offset %d\n", len, ofs));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to recover %d bytes at offset %d\n", len, ofs));
tdb->ecode = TDB_ERR_IO;
return -1;
}
free(data);
if (transaction_sync(tdb, 0, tdb->map_size) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to sync recovery\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to sync recovery\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
/* if the recovery area is after the recovered eof then remove it */
if (recovery_eof <= recovery_head) {
if (tdb_ofs_write(tdb, TDB_RECOVERY_HEAD, &zero) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to remove recovery head\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to remove recovery head\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
/* remove the recovery magic */
if (tdb_ofs_write(tdb, recovery_head + offsetof(struct list_struct, magic),
&zero) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to remove recovery magic\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to remove recovery magic\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
/* reduce the file size to the old size */
tdb_munmap(tdb);
if (ftruncate(tdb->fd, recovery_eof) != 0) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to reduce to recovery size\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to reduce to recovery size\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
tdb_mmap(tdb);
if (transaction_sync(tdb, 0, recovery_eof) == -1) {
- TDB_LOG((tdb, 0, "tdb_transaction_recover: failed to sync2 recovery\n"));
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_recover: failed to sync2 recovery\n"));
tdb->ecode = TDB_ERR_IO;
return -1;
}
- TDB_LOG((tdb, 0, "tdb_transaction_recover: recovered %d byte database\n",
+ TDB_LOG((tdb, TDB_DEBUG_TRACE, "tdb_transaction_recover: recovered %d byte database\n",
recovery_eof));
/* all done */
git.samba.org / ira / wip.git / blobdiff