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authorMichael Adam <obnox@samba.org>2011-07-07 17:42:08 +0200
committerMichael Adam <obnox@samba.org>2011-07-29 13:34:22 +0200
commit0b5c4a601a983aab06e4aba158cd9359babd1e71 (patch)
tree8e2806398d731036115661a88867be107783e538 /source3/lib/dbwrap
parentd4c93ca721d0edd8780ce84e7cccd0e5a1ea4f37 (diff)
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s3:dbwrap: move all .c and .h files of dbwrap to lib/dbwrap/
Autobuild-User: Michael Adam <obnox@samba.org> Autobuild-Date: Fri Jul 29 13:34:22 CEST 2011 on sn-devel-104
Diffstat (limited to 'source3/lib/dbwrap')
-rw-r--r--source3/lib/dbwrap/dbwrap.c66
-rw-r--r--source3/lib/dbwrap/dbwrap.h138
-rw-r--r--source3/lib/dbwrap/dbwrap_ctdb.c1440
-rw-r--r--source3/lib/dbwrap/dbwrap_file.c410
-rw-r--r--source3/lib/dbwrap/dbwrap_open.c2
-rw-r--r--source3/lib/dbwrap/dbwrap_rbt.c420
-rw-r--r--source3/lib/dbwrap/dbwrap_tdb.c379
-rw-r--r--source3/lib/dbwrap/dbwrap_util.c569
8 files changed, 3423 insertions, 1 deletions
diff --git a/source3/lib/dbwrap/dbwrap.c b/source3/lib/dbwrap/dbwrap.c
new file mode 100644
index 0000000000..6a6d4c64e5
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap.c
@@ -0,0 +1,66 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
+
+ Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_private.h"
+
+/*
+ * Fall back using fetch_locked if no genuine fetch operation is provided
+ */
+
+int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data)
+{
+ struct db_record *rec;
+
+ if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
+ return -1;
+ }
+
+ data->dsize = rec->value.dsize;
+ data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
+ TALLOC_FREE(rec);
+ return 0;
+}
+
+/*
+ * Fall back using fetch if no genuine parse operation is provided
+ */
+
+int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
+ int (*parser)(TDB_DATA key,
+ TDB_DATA data,
+ void *private_data),
+ void *private_data)
+{
+ TDB_DATA data;
+ int res;
+
+ res = db->fetch(db, talloc_tos(), key, &data);
+ if (res != 0) {
+ return res;
+ }
+
+ res = parser(key, data, private_data);
+ TALLOC_FREE(data.dptr);
+ return res;
+}
diff --git a/source3/lib/dbwrap/dbwrap.h b/source3/lib/dbwrap/dbwrap.h
new file mode 100644
index 0000000000..9084f87d30
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap.h
@@ -0,0 +1,138 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper around tdb
+ Copyright (C) Volker Lendecke 2005-2007
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __DBWRAP_H__
+#define __DBWRAP_H__
+
+#include "tdb_compat.h"
+
+struct db_record {
+ TDB_DATA key, value;
+ NTSTATUS (*store)(struct db_record *rec, TDB_DATA data, int flag);
+ NTSTATUS (*delete_rec)(struct db_record *rec);
+ void *private_data;
+};
+
+struct db_context {
+ struct db_record *(*fetch_locked)(struct db_context *db,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key);
+ int (*fetch)(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data);
+ int (*traverse)(struct db_context *db,
+ int (*f)(struct db_record *rec,
+ void *private_data),
+ void *private_data);
+ int (*traverse_read)(struct db_context *db,
+ int (*f)(struct db_record *rec,
+ void *private_data),
+ void *private_data);
+ int (*get_seqnum)(struct db_context *db);
+ int (*get_flags)(struct db_context *db);
+ int (*transaction_start)(struct db_context *db);
+ int (*transaction_commit)(struct db_context *db);
+ int (*transaction_cancel)(struct db_context *db);
+ int (*parse_record)(struct db_context *db, TDB_DATA key,
+ int (*parser)(TDB_DATA key, TDB_DATA data,
+ void *private_data),
+ void *private_data);
+ void *private_data;
+ bool persistent;
+};
+
+struct db_context *db_open_rbt(TALLOC_CTX *mem_ctx);
+
+struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode);
+
+struct messaging_context;
+
+#ifdef CLUSTER_SUPPORT
+struct db_context *db_open_ctdb(TALLOC_CTX *mem_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode);
+#endif
+
+struct db_context *db_open_file(TALLOC_CTX *mem_ctx,
+ struct messaging_context *msg_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode);
+
+
+NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key);
+NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
+ TDB_DATA data, int flags);
+TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key);
+NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key);
+NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags);
+TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key);
+
+/* The following definitions come from lib/dbwrap_util.c */
+
+int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr);
+int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v);
+bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
+ uint32_t *val);
+int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v);
+NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
+ uint32_t *oldval, uint32_t change_val);
+NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
+ const char *keystr,
+ uint32_t *oldval,
+ uint32_t change_val);
+NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
+ int32_t *oldval, int32_t change_val);
+NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
+ const char *keystr,
+ int32_t *oldval,
+ int32_t change_val);
+NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
+ int flag);
+NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key);
+NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
+ int32_t v);
+NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
+ uint32_t v);
+NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags);
+NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key);
+NTSTATUS dbwrap_trans_do(struct db_context *db,
+ NTSTATUS (*action)(struct db_context *, void *),
+ void *private_data);
+NTSTATUS dbwrap_trans_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data);
+NTSTATUS dbwrap_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data);
+
+NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key);
+NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
+ TDB_DATA data, int flags);
+TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key);
+
+#endif /* __DBWRAP_H__ */
diff --git a/source3/lib/dbwrap/dbwrap_ctdb.c b/source3/lib/dbwrap/dbwrap_ctdb.c
new file mode 100644
index 0000000000..454a28399f
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap_ctdb.c
@@ -0,0 +1,1440 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper around ctdbd
+ Copyright (C) Volker Lendecke 2007-2009
+ Copyright (C) Michael Adam 2009
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+#include "lib/util/tdb_wrap.h"
+#include "util_tdb.h"
+#ifdef CLUSTER_SUPPORT
+#include "ctdb.h"
+#include "ctdb_private.h"
+#include "ctdbd_conn.h"
+#include "dbwrap/dbwrap.h"
+#include "g_lock.h"
+#include "messages.h"
+
+struct db_ctdb_transaction_handle {
+ struct db_ctdb_ctx *ctx;
+ /*
+ * we store the reads and writes done under a transaction:
+ * - one list stores both reads and writes (m_all),
+ * - the other just writes (m_write)
+ */
+ struct ctdb_marshall_buffer *m_all;
+ struct ctdb_marshall_buffer *m_write;
+ uint32_t nesting;
+ bool nested_cancel;
+ char *lock_name;
+};
+
+struct db_ctdb_ctx {
+ struct db_context *db;
+ struct tdb_wrap *wtdb;
+ uint32 db_id;
+ struct db_ctdb_transaction_handle *transaction;
+ struct g_lock_ctx *lock_ctx;
+};
+
+struct db_ctdb_rec {
+ struct db_ctdb_ctx *ctdb_ctx;
+ struct ctdb_ltdb_header header;
+ struct timeval lock_time;
+};
+
+static NTSTATUS tdb_error_to_ntstatus(struct tdb_context *tdb)
+{
+ NTSTATUS status;
+ enum TDB_ERROR tret = tdb_error(tdb);
+
+ switch (tret) {
+ case TDB_ERR_EXISTS:
+ status = NT_STATUS_OBJECT_NAME_COLLISION;
+ break;
+ case TDB_ERR_NOEXIST:
+ status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ break;
+ default:
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ break;
+ }
+
+ return status;
+}
+
+
+/**
+ * fetch a record from the tdb, separating out the header
+ * information and returning the body of the record.
+ */
+static NTSTATUS db_ctdb_ltdb_fetch(struct db_ctdb_ctx *db,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA *data)
+{
+ TDB_DATA rec;
+ NTSTATUS status;
+
+ rec = tdb_fetch_compat(db->wtdb->tdb, key);
+ if (rec.dsize < sizeof(struct ctdb_ltdb_header)) {
+ status = NT_STATUS_NOT_FOUND;
+ if (data) {
+ ZERO_STRUCTP(data);
+ }
+ if (header) {
+ header->dmaster = (uint32_t)-1;
+ header->rsn = 0;
+ }
+ goto done;
+ }
+
+ if (header) {
+ *header = *(struct ctdb_ltdb_header *)rec.dptr;
+ }
+
+ if (data) {
+ data->dsize = rec.dsize - sizeof(struct ctdb_ltdb_header);
+ if (data->dsize == 0) {
+ data->dptr = NULL;
+ } else {
+ data->dptr = (unsigned char *)talloc_memdup(mem_ctx,
+ rec.dptr
+ + sizeof(struct ctdb_ltdb_header),
+ data->dsize);
+ if (data->dptr == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ }
+ }
+
+ status = NT_STATUS_OK;
+
+done:
+ SAFE_FREE(rec.dptr);
+ return status;
+}
+
+/*
+ * Store a record together with the ctdb record header
+ * in the local copy of the database.
+ */
+static NTSTATUS db_ctdb_ltdb_store(struct db_ctdb_ctx *db,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ TALLOC_CTX *tmp_ctx = talloc_stackframe();
+ TDB_DATA rec;
+ int ret;
+
+ rec.dsize = data.dsize + sizeof(struct ctdb_ltdb_header);
+ rec.dptr = (uint8_t *)talloc_size(tmp_ctx, rec.dsize);
+
+ if (rec.dptr == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ memcpy(rec.dptr, header, sizeof(struct ctdb_ltdb_header));
+ memcpy(sizeof(struct ctdb_ltdb_header) + (uint8_t *)rec.dptr, data.dptr, data.dsize);
+
+ ret = tdb_store(db->wtdb->tdb, key, rec, TDB_REPLACE);
+
+ talloc_free(tmp_ctx);
+
+ return (ret == 0) ? NT_STATUS_OK
+ : tdb_error_to_ntstatus(db->wtdb->tdb);
+
+}
+
+/*
+ form a ctdb_rec_data record from a key/data pair
+
+ note that header may be NULL. If not NULL then it is included in the data portion
+ of the record
+ */
+static struct ctdb_rec_data *db_ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ size_t length;
+ struct ctdb_rec_data *d;
+
+ length = offsetof(struct ctdb_rec_data, data) + key.dsize +
+ data.dsize + (header?sizeof(*header):0);
+ d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
+ if (d == NULL) {
+ return NULL;
+ }
+ d->length = length;
+ d->reqid = reqid;
+ d->keylen = key.dsize;
+ memcpy(&d->data[0], key.dptr, key.dsize);
+ if (header) {
+ d->datalen = data.dsize + sizeof(*header);
+ memcpy(&d->data[key.dsize], header, sizeof(*header));
+ memcpy(&d->data[key.dsize+sizeof(*header)], data.dptr, data.dsize);
+ } else {
+ d->datalen = data.dsize;
+ memcpy(&d->data[key.dsize], data.dptr, data.dsize);
+ }
+ return d;
+}
+
+
+/* helper function for marshalling multiple records */
+static struct ctdb_marshall_buffer *db_ctdb_marshall_add(TALLOC_CTX *mem_ctx,
+ struct ctdb_marshall_buffer *m,
+ uint64_t db_id,
+ uint32_t reqid,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ struct ctdb_rec_data *r;
+ size_t m_size, r_size;
+ struct ctdb_marshall_buffer *m2 = NULL;
+
+ r = db_ctdb_marshall_record(talloc_tos(), reqid, key, header, data);
+ if (r == NULL) {
+ talloc_free(m);
+ return NULL;
+ }
+
+ if (m == NULL) {
+ m = (struct ctdb_marshall_buffer *)talloc_zero_size(
+ mem_ctx, offsetof(struct ctdb_marshall_buffer, data));
+ if (m == NULL) {
+ goto done;
+ }
+ m->db_id = db_id;
+ }
+
+ m_size = talloc_get_size(m);
+ r_size = talloc_get_size(r);
+
+ m2 = (struct ctdb_marshall_buffer *)talloc_realloc_size(
+ mem_ctx, m, m_size + r_size);
+ if (m2 == NULL) {
+ talloc_free(m);
+ goto done;
+ }
+
+ memcpy(m_size + (uint8_t *)m2, r, r_size);
+
+ m2->count++;
+
+done:
+ talloc_free(r);
+ return m2;
+}
+
+/* we've finished marshalling, return a data blob with the marshalled records */
+static TDB_DATA db_ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
+{
+ TDB_DATA data;
+ data.dptr = (uint8_t *)m;
+ data.dsize = talloc_get_size(m);
+ return data;
+}
+
+/*
+ loop over a marshalling buffer
+
+ - pass r==NULL to start
+ - loop the number of times indicated by m->count
+*/
+static struct ctdb_rec_data *db_ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
+ uint32_t *reqid,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA *key, TDB_DATA *data)
+{
+ if (r == NULL) {
+ r = (struct ctdb_rec_data *)&m->data[0];
+ } else {
+ r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
+ }
+
+ if (reqid != NULL) {
+ *reqid = r->reqid;
+ }
+
+ if (key != NULL) {
+ key->dptr = &r->data[0];
+ key->dsize = r->keylen;
+ }
+ if (data != NULL) {
+ data->dptr = &r->data[r->keylen];
+ data->dsize = r->datalen;
+ if (header != NULL) {
+ data->dptr += sizeof(*header);
+ data->dsize -= sizeof(*header);
+ }
+ }
+
+ if (header != NULL) {
+ if (r->datalen < sizeof(*header)) {
+ return NULL;
+ }
+ *header = *(struct ctdb_ltdb_header *)&r->data[r->keylen];
+ }
+
+ return r;
+}
+
+/**
+ * CTDB transaction destructor
+ */
+static int db_ctdb_transaction_destructor(struct db_ctdb_transaction_handle *h)
+{
+ NTSTATUS status;
+
+ status = g_lock_unlock(h->ctx->lock_ctx, h->lock_name);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("g_lock_unlock failed: %s\n", nt_errstr(status)));
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * CTDB dbwrap API: transaction_start function
+ * starts a transaction on a persistent database
+ */
+static int db_ctdb_transaction_start(struct db_context *db)
+{
+ struct db_ctdb_transaction_handle *h;
+ NTSTATUS status;
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+
+ if (!db->persistent) {
+ DEBUG(0,("transactions not supported on non-persistent database 0x%08x\n",
+ ctx->db_id));
+ return -1;
+ }
+
+ if (ctx->transaction) {
+ ctx->transaction->nesting++;
+ return 0;
+ }
+
+ h = talloc_zero(db, struct db_ctdb_transaction_handle);
+ if (h == NULL) {
+ DEBUG(0,(__location__ " oom for transaction handle\n"));
+ return -1;
+ }
+
+ h->ctx = ctx;
+
+ h->lock_name = talloc_asprintf(h, "transaction_db_0x%08x",
+ (unsigned int)ctx->db_id);
+ if (h->lock_name == NULL) {
+ DEBUG(0, ("talloc_asprintf failed\n"));
+ TALLOC_FREE(h);
+ return -1;
+ }
+
+ /*
+ * Wait a day, i.e. forever...
+ */
+ status = g_lock_lock(ctx->lock_ctx, h->lock_name, G_LOCK_WRITE,
+ timeval_set(86400, 0));
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("g_lock_lock failed: %s\n", nt_errstr(status)));
+ TALLOC_FREE(h);
+ return -1;
+ }
+
+ talloc_set_destructor(h, db_ctdb_transaction_destructor);
+
+ ctx->transaction = h;
+
+ DEBUG(5,(__location__ " Started transaction on db 0x%08x\n", ctx->db_id));
+
+ return 0;
+}
+
+static bool pull_newest_from_marshall_buffer(struct ctdb_marshall_buffer *buf,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *pheader,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA *pdata)
+{
+ struct ctdb_rec_data *rec = NULL;
+ struct ctdb_ltdb_header h;
+ bool found = false;
+ TDB_DATA data;
+ int i;
+
+ if (buf == NULL) {
+ return false;
+ }
+
+ ZERO_STRUCT(h);
+ ZERO_STRUCT(data);
+
+ /*
+ * Walk the list of records written during this
+ * transaction. If we want to read one we have already
+ * written, return the last written sample. Thus we do not do
+ * a "break;" for the first hit, this record might have been
+ * overwritten later.
+ */
+
+ for (i=0; i<buf->count; i++) {
+ TDB_DATA tkey, tdata;
+ uint32_t reqid;
+ struct ctdb_ltdb_header hdr;
+
+ ZERO_STRUCT(hdr);
+
+ rec = db_ctdb_marshall_loop_next(buf, rec, &reqid, &hdr, &tkey,
+ &tdata);
+ if (rec == NULL) {
+ return false;
+ }
+
+ if (tdb_data_equal(key, tkey)) {
+ found = true;
+ data = tdata;
+ h = hdr;
+ }
+ }
+
+ if (!found) {
+ return false;
+ }
+
+ if (pdata != NULL) {
+ data.dptr = (uint8_t *)talloc_memdup(mem_ctx, data.dptr,
+ data.dsize);
+ if ((data.dsize != 0) && (data.dptr == NULL)) {
+ return false;
+ }
+ *pdata = data;
+ }
+
+ if (pheader != NULL) {
+ *pheader = h;
+ }
+
+ return true;
+}
+
+/*
+ fetch a record inside a transaction
+ */
+static int db_ctdb_transaction_fetch(struct db_ctdb_ctx *db,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data)
+{
+ struct db_ctdb_transaction_handle *h = db->transaction;
+ NTSTATUS status;
+ bool found;
+
+ found = pull_newest_from_marshall_buffer(h->m_write, key, NULL,
+ mem_ctx, data);
+ if (found) {
+ return 0;
+ }
+
+ status = db_ctdb_ltdb_fetch(h->ctx, key, NULL, mem_ctx, data);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
+ *data = tdb_null;
+ } else if (!NT_STATUS_IS_OK(status)) {
+ return -1;
+ }
+
+ h->m_all = db_ctdb_marshall_add(h, h->m_all, h->ctx->db_id, 1, key,
+ NULL, *data);
+ if (h->m_all == NULL) {
+ DEBUG(0,(__location__ " Failed to add to marshalling "
+ "record\n"));
+ data->dsize = 0;
+ talloc_free(data->dptr);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * Fetch a record from a persistent database
+ * without record locking and without an active transaction.
+ *
+ * This just fetches from the local database copy.
+ * Since the databases are kept in syc cluster-wide,
+ * there is no point in doing a ctdb call to fetch the
+ * record from the lmaster. It does even harm since migration
+ * of records bump their RSN and hence render the persistent
+ * database inconsistent.
+ */
+static int db_ctdb_fetch_persistent(struct db_ctdb_ctx *db,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data)
+{
+ NTSTATUS status;
+
+ status = db_ctdb_ltdb_fetch(db, key, NULL, mem_ctx, data);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
+ *data = tdb_null;
+ } else if (!NT_STATUS_IS_OK(status)) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static NTSTATUS db_ctdb_store_transaction(struct db_record *rec, TDB_DATA data, int flag);
+static NTSTATUS db_ctdb_delete_transaction(struct db_record *rec);
+
+static struct db_record *db_ctdb_fetch_locked_transaction(struct db_ctdb_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct db_record *result;
+ TDB_DATA ctdb_data;
+
+ if (!(result = talloc(mem_ctx, struct db_record))) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ result->private_data = ctx->transaction;
+
+ result->key.dsize = key.dsize;
+ result->key.dptr = (uint8 *)talloc_memdup(result, key.dptr, key.dsize);
+ if (result->key.dptr == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->store = db_ctdb_store_transaction;
+ result->delete_rec = db_ctdb_delete_transaction;
+
+ if (pull_newest_from_marshall_buffer(ctx->transaction->m_write, key,
+ NULL, result, &result->value)) {
+ return result;
+ }
+
+ ctdb_data = tdb_fetch_compat(ctx->wtdb->tdb, key);
+ if (ctdb_data.dptr == NULL) {
+ /* create the record */
+ result->value = tdb_null;
+ return result;
+ }
+
+ result->value.dsize = ctdb_data.dsize - sizeof(struct ctdb_ltdb_header);
+ result->value.dptr = NULL;
+
+ if ((result->value.dsize != 0)
+ && !(result->value.dptr = (uint8 *)talloc_memdup(
+ result, ctdb_data.dptr + sizeof(struct ctdb_ltdb_header),
+ result->value.dsize))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ }
+
+ SAFE_FREE(ctdb_data.dptr);
+
+ return result;
+}
+
+static int db_ctdb_record_destructor(struct db_record **recp)
+{
+ struct db_record *rec = talloc_get_type_abort(*recp, struct db_record);
+ struct db_ctdb_transaction_handle *h = talloc_get_type_abort(
+ rec->private_data, struct db_ctdb_transaction_handle);
+ int ret = h->ctx->db->transaction_commit(h->ctx->db);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " transaction_commit failed\n"));
+ }
+ return 0;
+}
+
+/*
+ auto-create a transaction for persistent databases
+ */
+static struct db_record *db_ctdb_fetch_locked_persistent(struct db_ctdb_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ int res;
+ struct db_record *rec, **recp;
+
+ res = db_ctdb_transaction_start(ctx->db);
+ if (res == -1) {
+ return NULL;
+ }
+
+ rec = db_ctdb_fetch_locked_transaction(ctx, mem_ctx, key);
+ if (rec == NULL) {
+ ctx->db->transaction_cancel(ctx->db);
+ return NULL;
+ }
+
+ /* destroy this transaction when we release the lock */
+ recp = talloc(rec, struct db_record *);
+ if (recp == NULL) {
+ ctx->db->transaction_cancel(ctx->db);
+ talloc_free(rec);
+ return NULL;
+ }
+ *recp = rec;
+ talloc_set_destructor(recp, db_ctdb_record_destructor);
+ return rec;
+}
+
+
+/*
+ stores a record inside a transaction
+ */
+static NTSTATUS db_ctdb_transaction_store(struct db_ctdb_transaction_handle *h,
+ TDB_DATA key, TDB_DATA data)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(h);
+ TDB_DATA rec;
+ struct ctdb_ltdb_header header;
+
+ ZERO_STRUCT(header);
+
+ /* we need the header so we can update the RSN */
+
+ if (!pull_newest_from_marshall_buffer(h->m_write, key, &header,
+ NULL, NULL)) {
+
+ rec = tdb_fetch_compat(h->ctx->wtdb->tdb, key);
+
+ if (rec.dptr != NULL) {
+ memcpy(&header, rec.dptr,
+ sizeof(struct ctdb_ltdb_header));
+ rec.dsize -= sizeof(struct ctdb_ltdb_header);
+
+ /*
+ * a special case, we are writing the same
+ * data that is there now
+ */
+ if (data.dsize == rec.dsize &&
+ memcmp(data.dptr,
+ rec.dptr + sizeof(struct ctdb_ltdb_header),
+ data.dsize) == 0) {
+ SAFE_FREE(rec.dptr);
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+ }
+ }
+ SAFE_FREE(rec.dptr);
+ }
+
+ header.dmaster = get_my_vnn();
+ header.rsn++;
+
+ h->m_all = db_ctdb_marshall_add(h, h->m_all, h->ctx->db_id, 0, key,
+ NULL, data);
+ if (h->m_all == NULL) {
+ DEBUG(0,(__location__ " Failed to add to marshalling "
+ "record\n"));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ h->m_write = db_ctdb_marshall_add(h, h->m_write, h->ctx->db_id, 0, key, &header, data);
+ if (h->m_write == NULL) {
+ DEBUG(0,(__location__ " Failed to add to marshalling record\n"));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ a record store inside a transaction
+ */
+static NTSTATUS db_ctdb_store_transaction(struct db_record *rec, TDB_DATA data, int flag)
+{
+ struct db_ctdb_transaction_handle *h = talloc_get_type_abort(
+ rec->private_data, struct db_ctdb_transaction_handle);
+ NTSTATUS status;
+
+ status = db_ctdb_transaction_store(h, rec->key, data);
+ return status;
+}
+
+/*
+ a record delete inside a transaction
+ */
+static NTSTATUS db_ctdb_delete_transaction(struct db_record *rec)
+{
+ struct db_ctdb_transaction_handle *h = talloc_get_type_abort(
+ rec->private_data, struct db_ctdb_transaction_handle);
+ NTSTATUS status;
+
+ status = db_ctdb_transaction_store(h, rec->key, tdb_null);
+ return status;
+}
+
+/**
+ * Fetch the db sequence number of a persistent db directly from the db.
+ */
+static NTSTATUS db_ctdb_fetch_db_seqnum_from_db(struct db_ctdb_ctx *db,
+ uint64_t *seqnum)
+{
+ NTSTATUS status;
+ const char *keyname = CTDB_DB_SEQNUM_KEY;
+ TDB_DATA key;
+ TDB_DATA data;
+ struct ctdb_ltdb_header header;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ if (seqnum == NULL) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ key = string_term_tdb_data(keyname);
+
+ status = db_ctdb_ltdb_fetch(db, key, &header, mem_ctx, &data);
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND))
+ {
+ goto done;
+ }
+
+ status = NT_STATUS_OK;
+
+ if (data.dsize != sizeof(uint64_t)) {
+ *seqnum = 0;
+ goto done;
+ }
+
+ *seqnum = *(uint64_t *)data.dptr;
+
+done:
+ TALLOC_FREE(mem_ctx);
+ return status;
+}
+
+/**
+ * Store the database sequence number inside a transaction.
+ */
+static NTSTATUS db_ctdb_store_db_seqnum(struct db_ctdb_transaction_handle *h,
+ uint64_t seqnum)
+{
+ NTSTATUS status;
+ const char *keyname = CTDB_DB_SEQNUM_KEY;
+ TDB_DATA key;
+ TDB_DATA data;
+
+ key = string_term_tdb_data(keyname);
+
+ data.dptr = (uint8_t *)&seqnum;
+ data.dsize = sizeof(uint64_t);
+
+ status = db_ctdb_transaction_store(h, key, data);
+
+ return status;
+}
+
+/*
+ commit a transaction
+ */
+static int db_ctdb_transaction_commit(struct db_context *db)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ NTSTATUS rets;
+ int status;
+ struct db_ctdb_transaction_handle *h = ctx->transaction;
+ uint64_t old_seqnum, new_seqnum;
+ int ret;
+
+ if (h == NULL) {
+ DEBUG(0,(__location__ " transaction commit with no open transaction on db 0x%08x\n", ctx->db_id));
+ return -1;
+ }
+
+ if (h->nested_cancel) {
+ db->transaction_cancel(db);
+ DEBUG(5,(__location__ " Failed transaction commit after nested cancel\n"));
+ return -1;
+ }
+
+ if (h->nesting != 0) {
+ h->nesting--;
+ return 0;
+ }
+
+ if (h->m_write == NULL) {
+ /*
+ * No changes were made, so don't change the seqnum,
+ * don't push to other node, just exit with success.
+ */
+ ret = 0;
+ goto done;
+ }
+
+ DEBUG(5,(__location__ " Commit transaction on db 0x%08x\n", ctx->db_id));
+
+ /*
+ * As the last db action before committing, bump the database sequence
+ * number. Note that this undoes all changes to the seqnum records
+ * performed under the transaction. This record is not meant to be
+ * modified by user interaction. It is for internal use only...
+ */
+ rets = db_ctdb_fetch_db_seqnum_from_db(ctx, &old_seqnum);
+ if (!NT_STATUS_IS_OK(rets)) {
+ DEBUG(1, (__location__ " failed to fetch the db sequence number "
+ "in transaction commit on db 0x%08x\n", ctx->db_id));
+ ret = -1;
+ goto done;
+ }
+
+ new_seqnum = old_seqnum + 1;
+
+ rets = db_ctdb_store_db_seqnum(h, new_seqnum);
+ if (!NT_STATUS_IS_OK(rets)) {
+ DEBUG(1, (__location__ "failed to store the db sequence number "
+ " in transaction commit on db 0x%08x\n", ctx->db_id));
+ ret = -1;
+ goto done;
+ }
+
+again:
+ /* tell ctdbd to commit to the other nodes */
+ rets = ctdbd_control_local(messaging_ctdbd_connection(),
+ CTDB_CONTROL_TRANS3_COMMIT,
+ h->ctx->db_id, 0,
+ db_ctdb_marshall_finish(h->m_write),
+ NULL, NULL, &status);
+ if (!NT_STATUS_IS_OK(rets) || status != 0) {
+ /*
+ * The TRANS3_COMMIT control should only possibly fail when a
+ * recovery has been running concurrently. In any case, the db
+ * will be the same on all nodes, either the new copy or the
+ * old copy. This can be detected by comparing the old and new
+ * local sequence numbers.
+ */
+ rets = db_ctdb_fetch_db_seqnum_from_db(ctx, &new_seqnum);
+ if (!NT_STATUS_IS_OK(rets)) {
+ DEBUG(1, (__location__ " failed to refetch db sequence "
+ "number after failed TRANS3_COMMIT\n"));
+ ret = -1;
+ goto done;
+ }
+
+ if (new_seqnum == old_seqnum) {
+ /* Recovery prevented all our changes: retry. */
+ goto again;
+ } else if (new_seqnum != (old_seqnum + 1)) {
+ DEBUG(0, (__location__ " ERROR: new_seqnum[%lu] != "
+ "old_seqnum[%lu] + (0 or 1) after failed "
+ "TRANS3_COMMIT - this should not happen!\n",
+ (unsigned long)new_seqnum,
+ (unsigned long)old_seqnum));
+ ret = -1;
+ goto done;
+ }
+ /*
+ * Recovery propagated our changes to all nodes, completing
+ * our commit for us - succeed.
+ */
+ }
+
+ ret = 0;
+
+done:
+ h->ctx->transaction = NULL;
+ talloc_free(h);
+ return ret;
+}
+
+
+/*
+ cancel a transaction
+ */
+static int db_ctdb_transaction_cancel(struct db_context *db)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ struct db_ctdb_transaction_handle *h = ctx->transaction;
+
+ if (h == NULL) {
+ DEBUG(0,(__location__ " transaction cancel with no open transaction on db 0x%08x\n", ctx->db_id));
+ return -1;
+ }
+
+ if (h->nesting != 0) {
+ h->nesting--;
+ h->nested_cancel = true;
+ return 0;
+ }
+
+ DEBUG(5,(__location__ " Cancel transaction on db 0x%08x\n", ctx->db_id));
+
+ ctx->transaction = NULL;
+ talloc_free(h);
+ return 0;
+}
+
+
+static NTSTATUS db_ctdb_store(struct db_record *rec, TDB_DATA data, int flag)
+{
+ struct db_ctdb_rec *crec = talloc_get_type_abort(
+ rec->private_data, struct db_ctdb_rec);
+
+ return db_ctdb_ltdb_store(crec->ctdb_ctx, rec->key, &(crec->header), data);
+}
+
+
+
+#ifdef HAVE_CTDB_CONTROL_SCHEDULE_FOR_DELETION_DECL
+static NTSTATUS db_ctdb_send_schedule_for_deletion(struct db_record *rec)
+{
+ NTSTATUS status;
+ struct ctdb_control_schedule_for_deletion *dd;
+ TDB_DATA indata;
+ int cstatus;
+ struct db_ctdb_rec *crec = talloc_get_type_abort(
+ rec->private_data, struct db_ctdb_rec);
+
+ indata.dsize = offsetof(struct ctdb_control_schedule_for_deletion, key) + rec->key.dsize;
+ indata.dptr = talloc_zero_array(crec, uint8_t, indata.dsize);
+ if (indata.dptr == NULL) {
+ DEBUG(0, (__location__ " talloc failed!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ dd = (struct ctdb_control_schedule_for_deletion *)(void *)indata.dptr;
+ dd->db_id = crec->ctdb_ctx->db_id;
+ dd->hdr = crec->header;
+ dd->keylen = rec->key.dsize;
+ memcpy(dd->key, rec->key.dptr, rec->key.dsize);
+
+ status = ctdbd_control_local(messaging_ctdbd_connection(),
+ CTDB_CONTROL_SCHEDULE_FOR_DELETION,
+ crec->ctdb_ctx->db_id,
+ CTDB_CTRL_FLAG_NOREPLY, /* flags */
+ indata,
+ NULL, /* outdata */
+ NULL, /* errmsg */
+ &cstatus);
+ talloc_free(indata.dptr);
+
+ if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
+ DEBUG(1, (__location__ " Error sending local control "
+ "SCHEDULE_FOR_DELETION: %s, cstatus = %d\n",
+ nt_errstr(status), cstatus));
+ if (NT_STATUS_IS_OK(status)) {
+ status = NT_STATUS_UNSUCCESSFUL;
+ }
+ }
+
+ return status;
+}
+#endif
+
+static NTSTATUS db_ctdb_delete(struct db_record *rec)
+{
+ TDB_DATA data;
+ NTSTATUS status;
+
+ /*
+ * We have to store the header with empty data. TODO: Fix the
+ * tdb-level cleanup
+ */
+
+ ZERO_STRUCT(data);
+
+ status = db_ctdb_store(rec, data, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+#ifdef HAVE_CTDB_CONTROL_SCHEDULE_FOR_DELETION_DECL
+ status = db_ctdb_send_schedule_for_deletion(rec);
+#endif
+
+ return status;
+}
+
+static int db_ctdb_record_destr(struct db_record* data)
+{
+ struct db_ctdb_rec *crec = talloc_get_type_abort(
+ data->private_data, struct db_ctdb_rec);
+ int threshold;
+
+ DEBUG(10, (DEBUGLEVEL > 10
+ ? "Unlocking db %u key %s\n"
+ : "Unlocking db %u key %.20s\n",
+ (int)crec->ctdb_ctx->db_id,
+ hex_encode_talloc(data, (unsigned char *)data->key.dptr,
+ data->key.dsize)));
+
+ tdb_chainunlock(crec->ctdb_ctx->wtdb->tdb, data->key);
+
+ threshold = lp_ctdb_locktime_warn_threshold();
+ if (threshold != 0) {
+ double timediff = timeval_elapsed(&crec->lock_time);
+ if ((timediff * 1000) > threshold) {
+ DEBUG(0, ("Held tdb lock %f seconds\n", timediff));
+ }
+ }
+
+ return 0;
+}
+
+static struct db_record *fetch_locked_internal(struct db_ctdb_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct db_record *result;
+ struct db_ctdb_rec *crec;
+ NTSTATUS status;
+ TDB_DATA ctdb_data;
+ int migrate_attempts = 0;
+
+ if (!(result = talloc(mem_ctx, struct db_record))) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ if (!(crec = talloc_zero(result, struct db_ctdb_rec))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->private_data = (void *)crec;
+ crec->ctdb_ctx = ctx;
+
+ result->key.dsize = key.dsize;
+ result->key.dptr = (uint8 *)talloc_memdup(result, key.dptr, key.dsize);
+ if (result->key.dptr == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ /*
+ * Do a blocking lock on the record
+ */
+again:
+
+ if (DEBUGLEVEL >= 10) {
+ char *keystr = hex_encode_talloc(result, key.dptr, key.dsize);
+ DEBUG(10, (DEBUGLEVEL > 10
+ ? "Locking db %u key %s\n"
+ : "Locking db %u key %.20s\n",
+ (int)crec->ctdb_ctx->db_id, keystr));
+ TALLOC_FREE(keystr);
+ }
+
+ if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
+ DEBUG(3, ("tdb_chainlock failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->store = db_ctdb_store;
+ result->delete_rec = db_ctdb_delete;
+ talloc_set_destructor(result, db_ctdb_record_destr);
+
+ ctdb_data = tdb_fetch_compat(ctx->wtdb->tdb, key);
+
+ /*
+ * See if we have a valid record and we are the dmaster. If so, we can
+ * take the shortcut and just return it.
+ */
+
+ if ((ctdb_data.dptr == NULL) ||
+ (ctdb_data.dsize < sizeof(struct ctdb_ltdb_header)) ||
+ ((struct ctdb_ltdb_header *)ctdb_data.dptr)->dmaster != get_my_vnn()
+#if 0
+ || (random() % 2 != 0)
+#endif
+) {
+ SAFE_FREE(ctdb_data.dptr);
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+ talloc_set_destructor(result, NULL);
+
+ migrate_attempts += 1;
+
+ DEBUG(10, ("ctdb_data.dptr = %p, dmaster = %u (%u)\n",
+ ctdb_data.dptr, ctdb_data.dptr ?
+ ((struct ctdb_ltdb_header *)ctdb_data.dptr)->dmaster : -1,
+ get_my_vnn()));
+
+ status = ctdbd_migrate(messaging_ctdbd_connection(), ctx->db_id,
+ key);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("ctdb_migrate failed: %s\n",
+ nt_errstr(status)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ /* now its migrated, try again */
+ goto again;
+ }
+
+ if (migrate_attempts > 10) {
+ DEBUG(0, ("db_ctdb_fetch_locked needed %d attempts\n",
+ migrate_attempts));
+ }
+
+ GetTimeOfDay(&crec->lock_time);
+
+ memcpy(&crec->header, ctdb_data.dptr, sizeof(crec->header));
+
+ result->value.dsize = ctdb_data.dsize - sizeof(crec->header);
+ result->value.dptr = NULL;
+
+ if ((result->value.dsize != 0)
+ && !(result->value.dptr = (uint8 *)talloc_memdup(
+ result, ctdb_data.dptr + sizeof(crec->header),
+ result->value.dsize))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ }
+
+ SAFE_FREE(ctdb_data.dptr);
+
+ return result;
+}
+
+static struct db_record *db_ctdb_fetch_locked(struct db_context *db,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+
+ if (ctx->transaction != NULL) {
+ return db_ctdb_fetch_locked_transaction(ctx, mem_ctx, key);
+ }
+
+ if (db->persistent) {
+ return db_ctdb_fetch_locked_persistent(ctx, mem_ctx, key);
+ }
+
+ return fetch_locked_internal(ctx, mem_ctx, key);
+}
+
+/*
+ fetch (unlocked, no migration) operation on ctdb
+ */
+static int db_ctdb_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ NTSTATUS status;
+ TDB_DATA ctdb_data;
+
+ if (ctx->transaction) {
+ return db_ctdb_transaction_fetch(ctx, mem_ctx, key, data);
+ }
+
+ if (db->persistent) {
+ return db_ctdb_fetch_persistent(ctx, mem_ctx, key, data);
+ }
+
+ /* try a direct fetch */
+ ctdb_data = tdb_fetch_compat(ctx->wtdb->tdb, key);
+
+ /*
+ * See if we have a valid record and we are the dmaster. If so, we can
+ * take the shortcut and just return it.
+ * we bypass the dmaster check for persistent databases
+ */
+ if ((ctdb_data.dptr != NULL) &&
+ (ctdb_data.dsize >= sizeof(struct ctdb_ltdb_header)) &&
+ ((struct ctdb_ltdb_header *)ctdb_data.dptr)->dmaster == get_my_vnn())
+ {
+ /* we are the dmaster - avoid the ctdb protocol op */
+
+ data->dsize = ctdb_data.dsize - sizeof(struct ctdb_ltdb_header);
+ if (data->dsize == 0) {
+ SAFE_FREE(ctdb_data.dptr);
+ data->dptr = NULL;
+ return 0;
+ }
+
+ data->dptr = (uint8 *)talloc_memdup(
+ mem_ctx, ctdb_data.dptr+sizeof(struct ctdb_ltdb_header),
+ data->dsize);
+
+ SAFE_FREE(ctdb_data.dptr);
+
+ if (data->dptr == NULL) {
+ return -1;
+ }
+ return 0;
+ }
+
+ SAFE_FREE(ctdb_data.dptr);
+
+ /* we weren't able to get it locally - ask ctdb to fetch it for us */
+ status = ctdbd_fetch(messaging_ctdbd_connection(), ctx->db_id, key,
+ mem_ctx, data);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("ctdbd_fetch failed: %s\n", nt_errstr(status)));
+ return -1;
+ }
+
+ return 0;
+}
+
+struct traverse_state {
+ struct db_context *db;
+ int (*fn)(struct db_record *rec, void *private_data);
+ void *private_data;
+};
+
+static void traverse_callback(TDB_DATA key, TDB_DATA data, void *private_data)
+{
+ struct traverse_state *state = (struct traverse_state *)private_data;
+ struct db_record *rec;
+ TALLOC_CTX *tmp_ctx = talloc_new(state->db);
+ /* we have to give them a locked record to prevent races */
+ rec = db_ctdb_fetch_locked(state->db, tmp_ctx, key);
+ if (rec && rec->value.dsize > 0) {
+ state->fn(rec, state->private_data);
+ }
+ talloc_free(tmp_ctx);
+}
+
+static int traverse_persistent_callback(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct traverse_state *state = (struct traverse_state *)private_data;
+ struct db_record *rec;
+ TALLOC_CTX *tmp_ctx = talloc_new(state->db);
+ int ret = 0;
+ /* we have to give them a locked record to prevent races */
+ rec = db_ctdb_fetch_locked(state->db, tmp_ctx, kbuf);
+ if (rec && rec->value.dsize > 0) {
+ ret = state->fn(rec, state->private_data);
+ }
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+static int db_ctdb_traverse(struct db_context *db,
+ int (*fn)(struct db_record *rec,
+ void *private_data),
+ void *private_data)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ struct traverse_state state;
+
+ state.db = db;
+ state.fn = fn;
+ state.private_data = private_data;
+
+ if (db->persistent) {
+ /* for persistent databases we don't need to do a ctdb traverse,
+ we can do a faster local traverse */
+ return tdb_traverse(ctx->wtdb->tdb, traverse_persistent_callback, &state);
+ }
+
+
+ ctdbd_traverse(ctx->db_id, traverse_callback, &state);
+ return 0;
+}
+
+static NTSTATUS db_ctdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static NTSTATUS db_ctdb_delete_deny(struct db_record *rec)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static void traverse_read_callback(TDB_DATA key, TDB_DATA data, void *private_data)
+{
+ struct traverse_state *state = (struct traverse_state *)private_data;
+ struct db_record rec;
+ rec.key = key;
+ rec.value = data;
+ rec.store = db_ctdb_store_deny;
+ rec.delete_rec = db_ctdb_delete_deny;
+ rec.private_data = state->db;
+ state->fn(&rec, state->private_data);
+}
+
+static int traverse_persistent_callback_read(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct traverse_state *state = (struct traverse_state *)private_data;
+ struct db_record rec;
+ rec.key = kbuf;
+ rec.value = dbuf;
+ rec.store = db_ctdb_store_deny;
+ rec.delete_rec = db_ctdb_delete_deny;
+ rec.private_data = state->db;
+
+ if (rec.value.dsize <= sizeof(struct ctdb_ltdb_header)) {
+ /* a deleted record */
+ return 0;
+ }
+ rec.value.dsize -= sizeof(struct ctdb_ltdb_header);
+ rec.value.dptr += sizeof(struct ctdb_ltdb_header);
+
+ return state->fn(&rec, state->private_data);
+}
+
+static int db_ctdb_traverse_read(struct db_context *db,
+ int (*fn)(struct db_record *rec,
+ void *private_data),
+ void *private_data)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ struct traverse_state state;
+
+ state.db = db;
+ state.fn = fn;
+ state.private_data = private_data;
+
+ if (db->persistent) {
+ /* for persistent databases we don't need to do a ctdb traverse,
+ we can do a faster local traverse */
+ return tdb_traverse_read(ctx->wtdb->tdb, traverse_persistent_callback_read, &state);
+ }
+
+ ctdbd_traverse(ctx->db_id, traverse_read_callback, &state);
+ return 0;
+}
+
+static int db_ctdb_get_seqnum(struct db_context *db)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ return tdb_get_seqnum(ctx->wtdb->tdb);
+}
+
+static int db_ctdb_get_flags(struct db_context *db)
+{
+ struct db_ctdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_ctdb_ctx);
+ return tdb_get_flags(ctx->wtdb->tdb);
+}
+
+struct db_context *db_open_ctdb(TALLOC_CTX *mem_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode)
+{
+ struct db_context *result;
+ struct db_ctdb_ctx *db_ctdb;
+ char *db_path;
+ struct ctdbd_connection *conn;
+
+ if (!lp_clustering()) {
+ DEBUG(10, ("Clustering disabled -- no ctdb\n"));
+ return NULL;
+ }
+
+ if (!(result = talloc_zero(mem_ctx, struct db_context))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ if (!(db_ctdb = talloc(result, struct db_ctdb_ctx))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ db_ctdb->transaction = NULL;
+ db_ctdb->db = result;
+
+ conn = messaging_ctdbd_connection();
+ if (conn == NULL) {
+ DEBUG(1, ("Could not connect to ctdb\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ if (!NT_STATUS_IS_OK(ctdbd_db_attach(conn, name, &db_ctdb->db_id, tdb_flags))) {
+ DEBUG(0, ("ctdbd_db_attach failed for %s\n", name));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ db_path = ctdbd_dbpath(conn, db_ctdb, db_ctdb->db_id);
+
+ result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
+
+ /* only pass through specific flags */
+ tdb_flags &= TDB_SEQNUM;
+
+ /* honor permissions if user has specified O_CREAT */
+ if (open_flags & O_CREAT) {
+ chmod(db_path, mode);
+ }
+
+ db_ctdb->wtdb = tdb_wrap_open(db_ctdb, db_path, hash_size, tdb_flags, O_RDWR, 0);
+ if (db_ctdb->wtdb == NULL) {
+ DEBUG(0, ("Could not open tdb %s: %s\n", db_path, strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ talloc_free(db_path);
+
+ if (result->persistent) {
+ db_ctdb->lock_ctx = g_lock_ctx_init(db_ctdb,
+ ctdb_conn_msg_ctx(conn));
+ if (db_ctdb->lock_ctx == NULL) {
+ DEBUG(0, ("g_lock_ctx_init failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ }
+
+ result->private_data = (void *)db_ctdb;
+ result->fetch_locked = db_ctdb_fetch_locked;
+ result->fetch = db_ctdb_fetch;
+ result->traverse = db_ctdb_traverse;
+ result->traverse_read = db_ctdb_traverse_read;
+ result->get_seqnum = db_ctdb_get_seqnum;
+ result->get_flags = db_ctdb_get_flags;
+ result->transaction_start = db_ctdb_transaction_start;
+ result->transaction_commit = db_ctdb_transaction_commit;
+ result->transaction_cancel = db_ctdb_transaction_cancel;
+
+ DEBUG(3,("db_open_ctdb: opened database '%s' with dbid 0x%x\n",
+ name, db_ctdb->db_id));
+
+ return result;
+}
+#endif
diff --git a/source3/lib/dbwrap/dbwrap_file.c b/source3/lib/dbwrap/dbwrap_file.c
new file mode 100644
index 0000000000..6ecd72810d
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap_file.c
@@ -0,0 +1,410 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface using a file per record
+ Copyright (C) Volker Lendecke 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+struct db_file_ctx {
+ const char *dirname;
+
+ /* We only support one locked record at a time -- everything else
+ * would lead to a potential deadlock anyway! */
+ struct db_record *locked_record;
+};
+
+struct db_locked_file {
+ int fd;
+ uint8 hash;
+ const char *name;
+ const char *path;
+ struct db_file_ctx *parent;
+};
+
+/* Copy from statcache.c... */
+
+static uint32 fsh(const uint8 *p, int len)
+{
+ uint32 n = 0;
+ int i;
+ for (i=0; i<len; i++) {
+ n = ((n << 5) + n) ^ (uint32)(p[i]);
+ }
+ return n;
+}
+
+static int db_locked_file_destr(struct db_locked_file *data)
+{
+ if (data->parent != NULL) {
+ data->parent->locked_record = NULL;
+ }
+
+ if (close(data->fd) != 0) {
+ DEBUG(3, ("close failed: %s\n", strerror(errno)));
+ return -1;
+ }
+
+ return 0;
+}
+
+static NTSTATUS db_file_store(struct db_record *rec, TDB_DATA data, int flag);
+static NTSTATUS db_file_delete(struct db_record *rec);
+
+static struct db_record *db_file_fetch_locked(struct db_context *db,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct db_file_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_file_ctx);
+ struct db_record *result;
+ struct db_locked_file *file;
+ struct flock fl;
+ SMB_STRUCT_STAT statbuf;
+ ssize_t nread;
+ int ret;
+
+ SMB_ASSERT(ctx->locked_record == NULL);
+
+ again:
+ if (!(result = talloc(mem_ctx, struct db_record))) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ if (!(file = talloc(result, struct db_locked_file))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->private_data = file;
+ result->store = db_file_store;
+ result->delete_rec = db_file_delete;
+
+ result->key.dsize = key.dsize;
+ result->key.dptr = (uint8 *)talloc_memdup(result, key.dptr, key.dsize);
+ if (result->key.dptr == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ /* Cut to 8 bits */
+ file->hash = fsh(key.dptr, key.dsize);
+ file->name = hex_encode_talloc(file, (unsigned char *)key.dptr, key.dsize);
+ if (file->name == NULL) {
+ DEBUG(0, ("hex_encode failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ file->path = talloc_asprintf(file, "%s/%2.2X/%s", ctx->dirname,
+ file->hash, file->name);
+ if (file->path == NULL) {
+ DEBUG(0, ("talloc_asprintf failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ become_root();
+ file->fd = open(file->path, O_RDWR|O_CREAT, 0644);
+ unbecome_root();
+
+ if (file->fd < 0) {
+ DEBUG(3, ("Could not open/create %s: %s\n",
+ file->path, strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ talloc_set_destructor(file, db_locked_file_destr);
+
+ fl.l_type = F_WRLCK;
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 1;
+ fl.l_pid = 0;
+
+ do {
+ ret = fcntl(file->fd, F_SETLKW, &fl);
+ } while ((ret == -1) && (errno == EINTR));
+
+ if (ret == -1) {
+ DEBUG(3, ("Could not get lock on %s: %s\n",
+ file->path, strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ if (sys_fstat(file->fd, &statbuf) != 0) {
+ DEBUG(3, ("Could not fstat %s: %s\n",
+ file->path, strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ if (statbuf.st_nlink == 0) {
+ /* Someone has deleted it under the lock, retry */
+ TALLOC_FREE(result);
+ goto again;
+ }
+
+ result->value.dsize = 0;
+ result->value.dptr = NULL;
+
+ if (statbuf.st_size != 0) {
+ result->value.dsize = statbuf.st_size;
+ result->value.dptr = talloc_array(result, uint8,
+ statbuf.st_size);
+ if (result->value.dptr == NULL) {
+ DEBUG(1, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ nread = read_data(file->fd, (char *)result->value.dptr,
+ result->value.dsize);
+ if (nread != result->value.dsize) {
+ DEBUG(3, ("read_data failed: %s\n", strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ }
+
+ ctx->locked_record = result;
+ file->parent = (struct db_file_ctx *)talloc_reference(file, ctx);
+
+ return result;
+}
+
+static NTSTATUS db_file_store_root(int fd, TDB_DATA data)
+{
+ if (sys_lseek(fd, 0, SEEK_SET) != 0) {
+ DEBUG(0, ("sys_lseek failed: %s\n", strerror(errno)));
+ return map_nt_error_from_unix(errno);
+ }
+
+ if (write_data(fd, (char *)data.dptr, data.dsize) != data.dsize) {
+ DEBUG(3, ("write_data failed: %s\n", strerror(errno)));
+ return map_nt_error_from_unix(errno);
+ }
+
+ if (sys_ftruncate(fd, data.dsize) != 0) {
+ DEBUG(3, ("sys_ftruncate failed: %s\n", strerror(errno)));
+ return map_nt_error_from_unix(errno);
+ }
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS db_file_store(struct db_record *rec, TDB_DATA data, int flag)
+{
+ struct db_locked_file *file =
+ talloc_get_type_abort(rec->private_data,
+ struct db_locked_file);
+ NTSTATUS status;
+
+ become_root();
+ status = db_file_store_root(file->fd, data);
+ unbecome_root();
+
+ return status;
+}
+
+static NTSTATUS db_file_delete(struct db_record *rec)
+{
+ struct db_locked_file *file =
+ talloc_get_type_abort(rec->private_data,
+ struct db_locked_file);
+ int res;
+
+ become_root();
+ res = unlink(file->path);
+ unbecome_root();
+
+ if (res == -1) {
+ DEBUG(3, ("unlink(%s) failed: %s\n", file->path,
+ strerror(errno)));
+ return map_nt_error_from_unix(errno);
+ }
+
+ return NT_STATUS_OK;
+}
+
+static int db_file_traverse(struct db_context *db,
+ int (*fn)(struct db_record *rec,
+ void *private_data),
+ void *private_data)
+{
+ struct db_file_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_file_ctx);
+ TALLOC_CTX *mem_ctx = talloc_init("traversal %s\n", ctx->dirname);
+
+ int i;
+ int count = 0;
+
+ for (i=0; i<256; i++) {
+ const char *dirname = talloc_asprintf(mem_ctx, "%s/%2.2X",
+ ctx->dirname, i);
+ DIR *dir;
+ struct dirent *dirent;
+
+ if (dirname == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(mem_ctx);
+ return -1;
+ }
+
+ dir = opendir(dirname);
+ if (dir == NULL) {
+ DEBUG(3, ("Could not open dir %s: %s\n", dirname,
+ strerror(errno)));
+ TALLOC_FREE(mem_ctx);
+ return -1;
+ }
+
+ while ((dirent = readdir(dir)) != NULL) {
+ DATA_BLOB keyblob;
+ TDB_DATA key;
+ struct db_record *rec;
+
+ if ((dirent->d_name[0] == '.') &&
+ ((dirent->d_name[1] == '\0') ||
+ ((dirent->d_name[1] == '.') &&
+ (dirent->d_name[2] == '\0')))) {
+ continue;
+ }
+
+ keyblob = strhex_to_data_blob(mem_ctx, dirent->d_name);
+ if (keyblob.data == NULL) {
+ DEBUG(5, ("strhex_to_data_blob failed\n"));
+ continue;
+ }
+
+ key.dptr = keyblob.data;
+ key.dsize = keyblob.length;
+
+ if ((ctx->locked_record != NULL) &&
+ (key.dsize == ctx->locked_record->key.dsize) &&
+ (memcmp(key.dptr, ctx->locked_record->key.dptr,
+ key.dsize) == 0)) {
+ count += 1;
+ if (fn(ctx->locked_record,
+ private_data) != 0) {
+ TALLOC_FREE(mem_ctx);
+ closedir(dir);
+ return count;
+ }
+ }
+
+ rec = db_file_fetch_locked(db, mem_ctx, key);
+ if (rec == NULL) {
+ /* Someone might have deleted it */
+ continue;
+ }
+
+ if (rec->value.dptr == NULL) {
+ TALLOC_FREE(rec);
+ continue;
+ }
+
+ count += 1;
+
+ if (fn(rec, private_data) != 0) {
+ TALLOC_FREE(mem_ctx);
+ closedir(dir);
+ return count;
+ }
+ TALLOC_FREE(rec);
+ }
+
+ closedir(dir);
+ }
+
+ TALLOC_FREE(mem_ctx);
+ return count;
+}
+
+struct db_context *db_open_file(TALLOC_CTX *mem_ctx,
+ struct messaging_context *msg_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode)
+{
+ struct db_context *result = NULL;
+ struct db_file_ctx *ctx;
+
+ if (!(result = talloc_zero(mem_ctx, struct db_context))) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ if (!(ctx = talloc(result, struct db_file_ctx))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->private_data = ctx;
+ result->fetch_locked = db_file_fetch_locked;
+ result->traverse = db_file_traverse;
+ result->traverse_read = db_file_traverse;
+ result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
+
+ ctx->locked_record = NULL;
+ if (!(ctx->dirname = talloc_strdup(ctx, name))) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ if (open_flags & O_CREAT) {
+ int ret, i;
+
+ mode |= (mode & S_IRUSR) ? S_IXUSR : 0;
+ mode |= (mode & S_IRGRP) ? S_IXGRP : 0;
+ mode |= (mode & S_IROTH) ? S_IXOTH : 0;
+
+ ret = mkdir(name, mode);
+ if ((ret != 0) && (errno != EEXIST)) {
+ DEBUG(5, ("mkdir(%s,%o) failed: %s\n", name, mode,
+ strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ for (i=0; i<256; i++) {
+ char *path;
+ path = talloc_asprintf(result, "%s/%2.2X", name, i);
+ if (path == NULL) {
+ DEBUG(0, ("asprintf failed\n"));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ ret = mkdir(path, mode);
+ if ((ret != 0) && (errno != EEXIST)) {
+ DEBUG(5, ("mkdir(%s,%o) failed: %s\n", path,
+ mode, strerror(errno)));
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ TALLOC_FREE(path);
+ }
+ }
+
+ return result;
+}
diff --git a/source3/lib/dbwrap/dbwrap_open.c b/source3/lib/dbwrap/dbwrap_open.c
index 8721b1b0f9..a5e15e305a 100644
--- a/source3/lib/dbwrap/dbwrap_open.c
+++ b/source3/lib/dbwrap/dbwrap_open.c
@@ -19,7 +19,7 @@
*/
#include "includes.h"
-#include "dbwrap.h"
+#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_private.h"
#include "dbwrap/dbwrap_open.h"
#include "util_tdb.h"
diff --git a/source3/lib/dbwrap/dbwrap_rbt.c b/source3/lib/dbwrap/dbwrap_rbt.c
new file mode 100644
index 0000000000..fa91d8cb95
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap_rbt.c
@@ -0,0 +1,420 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper around red-black trees
+ Copyright (C) Volker Lendecke 2007, 2008
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "dbwrap/dbwrap.h"
+#include "../lib/util/rbtree.h"
+
+#define DBWRAP_RBT_ALIGN(_size_) (((_size_)+15)&~15)
+
+struct db_rbt_ctx {
+ struct rb_root tree;
+};
+
+struct db_rbt_rec {
+ struct db_rbt_ctx *db_ctx;
+ struct db_rbt_node *node;
+};
+
+/* The structure that ends up in the tree */
+
+struct db_rbt_node {
+ struct rb_node rb_node;
+ size_t keysize, valuesize;
+
+ /*
+ * key and value are appended implicitly, "data" is only here as a
+ * target for offsetof()
+ */
+
+ char data[1];
+};
+
+/*
+ * Hide the ugly pointer calculations in a function
+ */
+
+static struct db_rbt_node *db_rbt2node(struct rb_node *node)
+{
+ return (struct db_rbt_node *)
+ ((char *)node - offsetof(struct db_rbt_node, rb_node));
+}
+
+/*
+ * Compare two keys
+ */
+
+static int db_rbt_compare(TDB_DATA a, TDB_DATA b)
+{
+ int res;
+
+ res = memcmp(a.dptr, b.dptr, MIN(a.dsize, b.dsize));
+
+ if ((res < 0) || ((res == 0) && (a.dsize < b.dsize))) {
+ return -1;
+ }
+ if ((res > 0) || ((res == 0) && (a.dsize > b.dsize))) {
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * dissect a db_rbt_node into its implicit key and value parts
+ */
+
+static void db_rbt_parse_node(struct db_rbt_node *node,
+ TDB_DATA *key, TDB_DATA *value)
+{
+ key->dptr = ((uint8 *)node) + offsetof(struct db_rbt_node, data);
+ key->dsize = node->keysize;
+ value->dptr = key->dptr + node->keysize;
+ value->dsize = node->valuesize;
+}
+
+static NTSTATUS db_rbt_store(struct db_record *rec, TDB_DATA data, int flag)
+{
+ struct db_rbt_rec *rec_priv = (struct db_rbt_rec *)rec->private_data;
+ struct db_rbt_node *node;
+
+ struct rb_node ** p;
+ struct rb_node * parent;
+
+ TDB_DATA this_key, this_val;
+
+ if (rec_priv->node != NULL) {
+
+ /*
+ * The record was around previously
+ */
+
+ db_rbt_parse_node(rec_priv->node, &this_key, &this_val);
+
+ SMB_ASSERT(this_key.dsize == rec->key.dsize);
+ SMB_ASSERT(memcmp(this_key.dptr, rec->key.dptr,
+ this_key.dsize) == 0);
+
+ if (this_val.dsize >= data.dsize) {
+ /*
+ * The new value fits into the old space
+ */
+ memcpy(this_val.dptr, data.dptr, data.dsize);
+ rec_priv->node->valuesize = data.dsize;
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * We need to delete the key from the tree and start fresh,
+ * there's not enough space in the existing record
+ */
+
+ rb_erase(&rec_priv->node->rb_node, &rec_priv->db_ctx->tree);
+
+ /*
+ * Keep the existing node around for a while: If the record
+ * existed before, we reference the key data in there.
+ */
+ }
+
+ node = (struct db_rbt_node *)talloc_size(rec_priv->db_ctx,
+ offsetof(struct db_rbt_node, data) + rec->key.dsize
+ + data.dsize);
+
+ if (node == NULL) {
+ TALLOC_FREE(rec_priv->node);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ZERO_STRUCT(node->rb_node);
+
+ node->keysize = rec->key.dsize;
+ node->valuesize = data.dsize;
+
+ db_rbt_parse_node(node, &this_key, &this_val);
+
+ memcpy(this_key.dptr, rec->key.dptr, node->keysize);
+ TALLOC_FREE(rec_priv->node);
+
+ memcpy(this_val.dptr, data.dptr, node->valuesize);
+
+ parent = NULL;
+ p = &rec_priv->db_ctx->tree.rb_node;
+
+ while (*p) {
+ struct db_rbt_node *r;
+ TDB_DATA search_key, search_val;
+ int res;
+
+ parent = (*p);
+
+ r = db_rbt2node(*p);
+
+ db_rbt_parse_node(r, &search_key, &search_val);
+
+ res = db_rbt_compare(this_key, search_key);
+
+ if (res == -1) {
+ p = &(*p)->rb_left;
+ }
+ else if (res == 1) {
+ p = &(*p)->rb_right;
+ }
+ else {
+ smb_panic("someone messed with the tree");
+ }
+ }
+
+ rb_link_node(&node->rb_node, parent, p);
+ rb_insert_color(&node->rb_node, &rec_priv->db_ctx->tree);
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS db_rbt_delete(struct db_record *rec)
+{
+ struct db_rbt_rec *rec_priv = (struct db_rbt_rec *)rec->private_data;
+
+ if (rec_priv->node == NULL) {
+ return NT_STATUS_OK;
+ }
+
+ rb_erase(&rec_priv->node->rb_node, &rec_priv->db_ctx->tree);
+ TALLOC_FREE(rec_priv->node);
+
+ return NT_STATUS_OK;
+}
+
+static struct db_record *db_rbt_fetch_locked(struct db_context *db_ctx,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct db_rbt_ctx *ctx = talloc_get_type_abort(
+ db_ctx->private_data, struct db_rbt_ctx);
+
+ struct db_rbt_rec *rec_priv;
+ struct db_record *result;
+ struct rb_node *n;
+ size_t size;
+ bool found = false;
+ struct db_rbt_node *r = NULL;
+ TDB_DATA search_key = tdb_null, search_val = tdb_null;
+
+ n = ctx->tree.rb_node;
+
+ while (n != NULL) {
+ int res;
+
+ r = db_rbt2node(n);
+
+ db_rbt_parse_node(r, &search_key, &search_val);
+
+ res = db_rbt_compare(key, search_key);
+
+ if (res == -1) {
+ n = n->rb_left;
+ }
+ else if (res == 1) {
+ n = n->rb_right;
+ }
+ else {
+ found = true;
+ break;
+ }
+ }
+
+ /*
+ * In this low-level routine, play tricks to reduce the number of
+ * tallocs to one. Not recommened for general use, but here it pays
+ * off.
+ */
+
+ size = DBWRAP_RBT_ALIGN(sizeof(struct db_record))
+ + sizeof(struct db_rbt_rec);
+
+ if (!found) {
+ /*
+ * We need to keep the key around for later store
+ */
+ size += key.dsize;
+ }
+
+ result = (struct db_record *)talloc_size(mem_ctx, size);
+ if (result == NULL) {
+ return NULL;
+ }
+
+ rec_priv = (struct db_rbt_rec *)
+ ((char *)result + DBWRAP_RBT_ALIGN(sizeof(struct db_record)));
+ rec_priv->db_ctx = ctx;
+
+ result->store = db_rbt_store;
+ result->delete_rec = db_rbt_delete;
+ result->private_data = rec_priv;
+
+ if (found) {
+ rec_priv->node = r;
+ result->key = search_key;
+ result->value = search_val;
+ }
+ else {
+ rec_priv->node = NULL;
+ result->key.dptr = (uint8 *)
+ ((char *)rec_priv + sizeof(*rec_priv));
+ result->key.dsize = key.dsize;
+ memcpy(result->key.dptr, key.dptr, key.dsize);
+
+ result->value = tdb_null;
+ }
+
+ return result;
+}
+
+static int db_rbt_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *data)
+{
+ struct db_rbt_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_rbt_ctx);
+
+ struct rb_node *n;
+ bool found = false;
+ struct db_rbt_node *r = NULL;
+ TDB_DATA search_key, search_val;
+ uint8_t *result;
+
+ n = ctx->tree.rb_node;
+
+ while (n != NULL) {
+ int res;
+
+ r = db_rbt2node(n);
+
+ db_rbt_parse_node(r, &search_key, &search_val);
+
+ res = db_rbt_compare(key, search_key);
+
+ if (res == -1) {
+ n = n->rb_left;
+ }
+ else if (res == 1) {
+ n = n->rb_right;
+ }
+ else {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ *data = tdb_null;
+ return 0;
+ }
+
+ result = (uint8 *)talloc_memdup(mem_ctx, search_val.dptr,
+ search_val.dsize);
+ if (result == NULL) {
+ return -1;
+ }
+
+ data->dptr = result;
+ data->dsize = search_val.dsize;
+ return 0;
+}
+
+static int db_rbt_traverse_internal(struct rb_node *n,
+ int (*f)(struct db_record *db,
+ void *private_data),
+ void *private_data)
+{
+ struct db_rbt_node *r;
+ struct db_record rec;
+ int ret;
+
+ if (n == NULL) {
+ return 0;
+ }
+
+ ret = db_rbt_traverse_internal(n->rb_left, f, private_data);
+ if (ret != 0) {
+ return ret;
+ }
+
+ r = db_rbt2node(n);
+ ZERO_STRUCT(rec);
+ db_rbt_parse_node(r, &rec.key, &rec.value);
+
+ ret = f(&rec, private_data);
+ if (ret != 0) {
+ return ret;
+ }
+
+ return db_rbt_traverse_internal(n->rb_right, f, private_data);
+}
+
+static int db_rbt_traverse(struct db_context *db,
+ int (*f)(struct db_record *db,
+ void *private_data),
+ void *private_data)
+{
+ struct db_rbt_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_rbt_ctx);
+
+ return db_rbt_traverse_internal(ctx->tree.rb_node, f, private_data);
+}
+
+static int db_rbt_get_seqnum(struct db_context *db)
+{
+ return 0;
+}
+
+static int db_rbt_trans_dummy(struct db_context *db)
+{
+ /*
+ * Transactions are pretty pointless in-memory, just return success.
+ */
+ return 0;
+}
+
+struct db_context *db_open_rbt(TALLOC_CTX *mem_ctx)
+{
+ struct db_context *result;
+
+ result = talloc(mem_ctx, struct db_context);
+
+ if (result == NULL) {
+ return NULL;
+ }
+
+ result->private_data = talloc_zero(result, struct db_rbt_ctx);
+
+ if (result->private_data == NULL) {
+ TALLOC_FREE(result);
+ return NULL;
+ }
+
+ result->fetch_locked = db_rbt_fetch_locked;
+ result->fetch = db_rbt_fetch;
+ result->traverse = db_rbt_traverse;
+ result->traverse_read = db_rbt_traverse;
+ result->get_seqnum = db_rbt_get_seqnum;
+ result->transaction_start = db_rbt_trans_dummy;
+ result->transaction_commit = db_rbt_trans_dummy;
+ result->transaction_cancel = db_rbt_trans_dummy;
+
+ return result;
+}
diff --git a/source3/lib/dbwrap/dbwrap_tdb.c b/source3/lib/dbwrap/dbwrap_tdb.c
new file mode 100644
index 0000000000..aca57b63ce
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap_tdb.c
@@ -0,0 +1,379 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper around tdb
+ Copyright (C) Volker Lendecke 2005-2007
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "dbwrap/dbwrap.h"
+#include "lib/util/tdb_wrap.h"
+
+struct db_tdb_ctx {
+ struct tdb_wrap *wtdb;
+};
+
+static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag);
+static NTSTATUS db_tdb_delete(struct db_record *rec);
+
+static int db_tdb_record_destr(struct db_record* data)
+{
+ struct db_tdb_ctx *ctx =
+ talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
+
+ /* This hex_encode_talloc() call allocates memory on data context. By way how current
+ __talloc_free() code works, it is OK to allocate in the destructor as
+ the children of data will be freed after call to the destructor and this
+ new 'child' will be caught and freed correctly.
+ */
+ DEBUG(10, (DEBUGLEVEL > 10
+ ? "Unlocking key %s\n" : "Unlocking key %.20s\n",
+ hex_encode_talloc(data, (unsigned char *)data->key.dptr,
+ data->key.dsize)));
+
+ tdb_chainunlock(ctx->wtdb->tdb, data->key);
+ return 0;
+}
+
+struct tdb_fetch_locked_state {
+ TALLOC_CTX *mem_ctx;
+ struct db_record *result;
+};
+
+static int db_tdb_fetchlock_parse(TDB_DATA key, TDB_DATA data,
+ void *private_data)
+{
+ struct tdb_fetch_locked_state *state =
+ (struct tdb_fetch_locked_state *)private_data;
+
+ state->result = (struct db_record *)talloc_size(
+ state->mem_ctx,
+ sizeof(struct db_record) + key.dsize + data.dsize);
+
+ if (state->result == NULL) {
+ return 0;
+ }
+
+ state->result->key.dsize = key.dsize;
+ state->result->key.dptr = ((uint8 *)state->result)
+ + sizeof(struct db_record);
+ memcpy(state->result->key.dptr, key.dptr, key.dsize);
+
+ state->result->value.dsize = data.dsize;
+
+ if (data.dsize > 0) {
+ state->result->value.dptr = state->result->key.dptr+key.dsize;
+ memcpy(state->result->value.dptr, data.dptr, data.dsize);
+ }
+ else {
+ state->result->value.dptr = NULL;
+ }
+
+ return 0;
+}
+
+static struct db_record *db_tdb_fetch_locked(struct db_context *db,
+ TALLOC_CTX *mem_ctx, TDB_DATA key)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_tdb_ctx);
+ struct tdb_fetch_locked_state state;
+
+ /* Do not accidently allocate/deallocate w/o need when debug level is lower than needed */
+ if(DEBUGLEVEL >= 10) {
+ char *keystr = hex_encode_talloc(talloc_tos(), (unsigned char*)key.dptr, key.dsize);
+ DEBUG(10, (DEBUGLEVEL > 10
+ ? "Locking key %s\n" : "Locking key %.20s\n",
+ keystr));
+ TALLOC_FREE(keystr);
+ }
+
+ if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
+ DEBUG(3, ("tdb_chainlock failed\n"));
+ return NULL;
+ }
+
+ state.mem_ctx = mem_ctx;
+ state.result = NULL;
+
+ tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetchlock_parse, &state);
+
+ if (state.result == NULL) {
+ db_tdb_fetchlock_parse(key, tdb_null, &state);
+ }
+
+ if (state.result == NULL) {
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+ return NULL;
+ }
+
+ talloc_set_destructor(state.result, db_tdb_record_destr);
+
+ state.result->private_data = talloc_reference(state.result, ctx);
+ state.result->store = db_tdb_store;
+ state.result->delete_rec = db_tdb_delete;
+
+ DEBUG(10, ("Allocated locked data 0x%p\n", state.result));
+
+ return state.result;
+}
+
+struct tdb_fetch_state {
+ TALLOC_CTX *mem_ctx;
+ int result;
+ TDB_DATA data;
+};
+
+static int db_tdb_fetch_parse(TDB_DATA key, TDB_DATA data,
+ void *private_data)
+{
+ struct tdb_fetch_state *state =
+ (struct tdb_fetch_state *)private_data;
+
+ state->data.dptr = (uint8 *)talloc_memdup(state->mem_ctx, data.dptr,
+ data.dsize);
+ if (state->data.dptr == NULL) {
+ state->result = -1;
+ return 0;
+ }
+
+ state->data.dsize = data.dsize;
+ return 0;
+}
+
+static int db_tdb_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key, TDB_DATA *pdata)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+
+ struct tdb_fetch_state state;
+
+ state.mem_ctx = mem_ctx;
+ state.result = 0;
+ state.data = tdb_null;
+
+ tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetch_parse, &state);
+
+ if (state.result == -1) {
+ return -1;
+ }
+
+ *pdata = state.data;
+ return 0;
+}
+
+static int db_tdb_parse(struct db_context *db, TDB_DATA key,
+ int (*parser)(TDB_DATA key, TDB_DATA data,
+ void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+
+ return tdb_parse_record(ctx->wtdb->tdb, key, parser, private_data);
+}
+
+static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+ struct db_tdb_ctx);
+
+ /*
+ * This has a bug: We need to replace rec->value for correct
+ * operation, but right now brlock and locking don't use the value
+ * anymore after it was stored.
+ */
+
+ return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
+ NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+static NTSTATUS db_tdb_delete(struct db_record *rec)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+ struct db_tdb_ctx);
+
+ if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
+ return NT_STATUS_OK;
+ }
+
+ if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
+ return NT_STATUS_NOT_FOUND;
+ }
+
+ return NT_STATUS_UNSUCCESSFUL;
+}
+
+struct db_tdb_traverse_ctx {
+ struct db_context *db;
+ int (*f)(struct db_record *rec, void *private_data);
+ void *private_data;
+};
+
+static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct db_tdb_traverse_ctx *ctx =
+ (struct db_tdb_traverse_ctx *)private_data;
+ struct db_record rec;
+
+ rec.key = kbuf;
+ rec.value = dbuf;
+ rec.store = db_tdb_store;
+ rec.delete_rec = db_tdb_delete;
+ rec.private_data = ctx->db->private_data;
+
+ return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_tdb_traverse(struct db_context *db,
+ int (*f)(struct db_record *rec, void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ struct db_tdb_traverse_ctx ctx;
+
+ ctx.db = db;
+ ctx.f = f;
+ ctx.private_data = private_data;
+ return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
+}
+
+static NTSTATUS db_tdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct db_tdb_traverse_ctx *ctx =
+ (struct db_tdb_traverse_ctx *)private_data;
+ struct db_record rec;
+
+ rec.key = kbuf;
+ rec.value = dbuf;
+ rec.store = db_tdb_store_deny;
+ rec.delete_rec = db_tdb_delete_deny;
+ rec.private_data = ctx->db->private_data;
+
+ return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_tdb_traverse_read(struct db_context *db,
+ int (*f)(struct db_record *rec, void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ struct db_tdb_traverse_ctx ctx;
+
+ ctx.db = db;
+ ctx.f = f;
+ ctx.private_data = private_data;
+ return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
+}
+
+static int db_tdb_get_seqnum(struct db_context *db)
+
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_get_seqnum(db_ctx->wtdb->tdb);
+}
+
+static int db_tdb_get_flags(struct db_context *db)
+
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_get_flags(db_ctx->wtdb->tdb);
+}
+
+static int db_tdb_transaction_start(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_transaction_start(db_ctx->wtdb->tdb);
+}
+
+static int db_tdb_transaction_commit(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_transaction_commit(db_ctx->wtdb->tdb);
+}
+
+static int db_tdb_transaction_cancel(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ tdb_transaction_cancel(db_ctx->wtdb->tdb);
+ return 0;
+}
+
+struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode)
+{
+ struct db_context *result = NULL;
+ struct db_tdb_ctx *db_tdb;
+
+ result = talloc_zero(mem_ctx, struct db_context);
+ if (result == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ goto fail;
+ }
+
+ result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
+ if (db_tdb == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ goto fail;
+ }
+
+ db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
+ open_flags, mode);
+ if (db_tdb->wtdb == NULL) {
+ DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
+ goto fail;
+ }
+
+ result->fetch_locked = db_tdb_fetch_locked;
+ result->fetch = db_tdb_fetch;
+ result->traverse = db_tdb_traverse;
+ result->traverse_read = db_tdb_traverse_read;
+ result->parse_record = db_tdb_parse;
+ result->get_seqnum = db_tdb_get_seqnum;
+ result->get_flags = db_tdb_get_flags;
+ result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
+ result->transaction_start = db_tdb_transaction_start;
+ result->transaction_commit = db_tdb_transaction_commit;
+ result->transaction_cancel = db_tdb_transaction_cancel;
+ return result;
+
+ fail:
+ if (result != NULL) {
+ TALLOC_FREE(result);
+ }
+ return NULL;
+}
diff --git a/source3/lib/dbwrap/dbwrap_util.c b/source3/lib/dbwrap/dbwrap_util.c
new file mode 100644
index 0000000000..effcf40c6b
--- /dev/null
+++ b/source3/lib/dbwrap/dbwrap_util.c
@@ -0,0 +1,569 @@
+/*
+ Unix SMB/CIFS implementation.
+ Utility functions for the dbwrap API
+ Copyright (C) Volker Lendecke 2007
+ Copyright (C) Michael Adam 2009
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
+
+ Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "dbwrap.h"
+#include "util_tdb.h"
+
+int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
+{
+ TDB_DATA dbuf;
+ int32 ret;
+
+ if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
+ return -1;
+ }
+
+ if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
+ TALLOC_FREE(dbuf.dptr);
+ return -1;
+ }
+
+ ret = IVAL(dbuf.dptr, 0);
+ TALLOC_FREE(dbuf.dptr);
+ return ret;
+}
+
+int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
+{
+ struct db_record *rec;
+ int32 v_store;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
+ if (rec == NULL) {
+ return -1;
+ }
+
+ SIVAL(&v_store, 0, v);
+
+ status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+ TALLOC_FREE(rec);
+ return NT_STATUS_IS_OK(status) ? 0 : -1;
+}
+
+bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
+ uint32_t *val)
+{
+ TDB_DATA dbuf;
+
+ if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
+ return false;
+ }
+
+ if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
+ TALLOC_FREE(dbuf.dptr);
+ return false;
+ }
+
+ *val = IVAL(dbuf.dptr, 0);
+ TALLOC_FREE(dbuf.dptr);
+ return true;
+}
+
+int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
+{
+ struct db_record *rec;
+ uint32 v_store;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
+ if (rec == NULL) {
+ return -1;
+ }
+
+ SIVAL(&v_store, 0, v);
+
+ status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+ TALLOC_FREE(rec);
+ return NT_STATUS_IS_OK(status) ? 0 : -1;
+}
+
+/**
+ * Atomic unsigned integer change (addition):
+ *
+ * if value does not exist yet in the db, use *oldval as initial old value.
+ * return old value in *oldval.
+ * store *oldval + change_val to db.
+ */
+
+struct dbwrap_change_uint32_atomic_context {
+ const char *keystr;
+ uint32_t *oldval;
+ uint32_t change_val;
+};
+
+static NTSTATUS dbwrap_change_uint32_atomic_action(struct db_context *db,
+ void *private_data)
+{
+ struct db_record *rec;
+ uint32_t val = (uint32_t)-1;
+ uint32_t v_store;
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context *state;
+
+ state = (struct dbwrap_change_uint32_atomic_context *)private_data;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
+ if (!rec) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (rec->value.dptr == NULL) {
+ val = *(state->oldval);
+ } else if (rec->value.dsize == sizeof(val)) {
+ val = IVAL(rec->value.dptr, 0);
+ *(state->oldval) = val;
+ } else {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ val += state->change_val;
+
+ SIVAL(&v_store, 0, val);
+
+ ret = rec->store(rec,
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+
+done:
+ TALLOC_FREE(rec);
+ return ret;
+}
+
+NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
+ uint32_t *oldval, uint32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_change_uint32_atomic_action(db, &state);
+
+ return ret;
+}
+
+NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
+ const char *keystr,
+ uint32_t *oldval,
+ uint32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_trans_do(db, dbwrap_change_uint32_atomic_action, &state);
+
+ return ret;
+}
+
+/**
+ * Atomic integer change (addition):
+ *
+ * if value does not exist yet in the db, use *oldval as initial old value.
+ * return old value in *oldval.
+ * store *oldval + change_val to db.
+ */
+
+struct dbwrap_change_int32_atomic_context {
+ const char *keystr;
+ int32_t *oldval;
+ int32_t change_val;
+};
+
+static NTSTATUS dbwrap_change_int32_atomic_action(struct db_context *db,
+ void *private_data)
+{
+ struct db_record *rec;
+ int32_t val = -1;
+ int32_t v_store;
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context *state;
+
+ state = (struct dbwrap_change_int32_atomic_context *)private_data;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
+ if (!rec) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (rec->value.dptr == NULL) {
+ val = *(state->oldval);
+ } else if (rec->value.dsize == sizeof(val)) {
+ val = IVAL(rec->value.dptr, 0);
+ *(state->oldval) = val;
+ } else {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ val += state->change_val;
+
+ SIVAL(&v_store, 0, val);
+
+ ret = rec->store(rec,
+ make_tdb_data((const uint8_t *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+
+done:
+ TALLOC_FREE(rec);
+ return ret;
+}
+
+NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
+ int32_t *oldval, int32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_change_int32_atomic_action(db, &state);
+
+ return ret;
+}
+
+NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
+ const char *keystr,
+ int32_t *oldval,
+ int32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_trans_do(db, dbwrap_change_int32_atomic_action, &state);
+
+ return ret;
+}
+
+struct dbwrap_store_context {
+ TDB_DATA *key;
+ TDB_DATA *dbuf;
+ int flag;
+};
+
+static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
+{
+ struct db_record *rec = NULL;
+ NTSTATUS status;
+ struct dbwrap_store_context *store_ctx;
+
+ store_ctx = (struct dbwrap_store_context *)private_data;
+
+ rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
+ if (rec == NULL) {
+ DEBUG(5, ("fetch_locked failed\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("store returned %s\n", nt_errstr(status)));
+ }
+
+ TALLOC_FREE(rec);
+ return status;
+}
+
+NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
+ int flag)
+{
+ NTSTATUS status;
+ struct dbwrap_store_context store_ctx;
+
+ store_ctx.key = &key;
+ store_ctx.dbuf = &dbuf;
+ store_ctx.flag = flag;
+
+ status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
+
+ return status;
+}
+
+static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
+{
+ NTSTATUS status;
+ struct db_record *rec;
+ TDB_DATA *key = (TDB_DATA *)private_data;
+
+ rec = db->fetch_locked(db, talloc_tos(), *key);
+ if (rec == NULL) {
+ DEBUG(5, ("fetch_locked failed\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
+ }
+
+ talloc_free(rec);
+ return status;
+}
+
+NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
+{
+ NTSTATUS status;
+
+ status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
+
+ return status;
+}
+
+NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
+ int32_t v)
+{
+ int32 v_store;
+
+ SIVAL(&v_store, 0, v);
+
+ return dbwrap_trans_store(db, string_term_tdb_data(keystr),
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+}
+
+NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
+ uint32_t v)
+{
+ uint32 v_store;
+
+ SIVAL(&v_store, 0, v);
+
+ return dbwrap_trans_store(db, string_term_tdb_data(keystr),
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+}
+
+NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
+}
+
+NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
+{
+ return dbwrap_trans_delete(db, string_term_tdb_data(key));
+}
+
+/**
+ * Wrap db action(s) into a transaction.
+ */
+NTSTATUS dbwrap_trans_do(struct db_context *db,
+ NTSTATUS (*action)(struct db_context *, void *),
+ void *private_data)
+{
+ int res;
+ NTSTATUS status;
+
+ res = db->transaction_start(db);
+ if (res != 0) {
+ DEBUG(5, ("transaction_start failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ status = action(db, private_data);
+ if (!NT_STATUS_IS_OK(status)) {
+ if (db->transaction_cancel(db) != 0) {
+ smb_panic("Cancelling transaction failed");
+ }
+ return status;
+ }
+
+ res = db->transaction_commit(db);
+ if (res == 0) {
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(2, ("transaction_commit failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+}
+
+struct dbwrap_trans_traverse_action_ctx {
+ int (*f)(struct db_record* rec, void* private_data);
+ void* private_data;
+};
+
+
+static NTSTATUS dbwrap_trans_traverse_action(struct db_context* db, void* private_data)
+{
+ struct dbwrap_trans_traverse_action_ctx* ctx =
+ (struct dbwrap_trans_traverse_action_ctx*)private_data;
+
+ int ret = db->traverse(db, ctx->f, ctx->private_data);
+
+ return (ret < 0) ? NT_STATUS_INTERNAL_DB_CORRUPTION : NT_STATUS_OK;
+}
+
+NTSTATUS dbwrap_trans_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data)
+{
+ struct dbwrap_trans_traverse_action_ctx ctx = {
+ .f = f,
+ .private_data = private_data,
+ };
+ return dbwrap_trans_do(db, dbwrap_trans_traverse_action, &ctx);
+}
+
+NTSTATUS dbwrap_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data)
+{
+ int ret = db->traverse(db, f, private_data);
+ return (ret < 0) ? NT_STATUS_INTERNAL_DB_CORRUPTION : NT_STATUS_OK;
+}
+
+
+
+NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
+{
+ struct db_record *rec;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, talloc_tos(), key);
+ if (rec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ status = rec->delete_rec(rec);
+ TALLOC_FREE(rec);
+ return status;
+}
+
+NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
+ TDB_DATA data, int flags)
+{
+ struct db_record *rec;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, talloc_tos(), key);
+ if (rec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->store(rec, data, flags);
+ TALLOC_FREE(rec);
+ return status;
+}
+
+TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ TDB_DATA result;
+
+ if (db->fetch(db, mem_ctx, key, &result) != 0) {
+ return make_tdb_data(NULL, 0);
+ }
+
+ return result;
+}
+
+NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
+{
+ return dbwrap_delete(db, string_term_tdb_data(key));
+}
+
+NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ return dbwrap_store(db, string_term_tdb_data(key), data, flags);
+}
+
+TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key)
+{
+ return dbwrap_fetch(db, mem_ctx, string_term_tdb_data(key));
+}
+
+
+
+NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
+{
+ char *key_upper;
+ NTSTATUS status;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dbwrap_delete_bystring(db, key_upper);
+
+ talloc_free(key_upper);
+ return status;
+}
+
+NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ char *key_upper;
+ NTSTATUS status;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dbwrap_store_bystring(db, key_upper, data, flags);
+
+ talloc_free(key_upper);
+ return status;
+}
+
+TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key)
+{
+ char *key_upper;
+ TDB_DATA result;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return make_tdb_data(NULL, 0);
+ }
+
+ result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
+
+ talloc_free(key_upper);
+ return result;
+}