dbwrap: dbwrap_ntdb.c
authorRusty Russell <rusty@rustcorp.com.au>
Wed, 20 Feb 2013 04:28:59 +0000 (14:58 +1030)
committerRusty Russell <rusty@rustcorp.com.au>
Wed, 20 Feb 2013 04:31:19 +0000 (05:31 +0100)
This is a dbwrap backend for ntdb.  It's a fairly straight conversion from
the tdb version.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
lib/dbwrap/dbwrap_ntdb.c [new file with mode: 0644]
lib/dbwrap/dbwrap_ntdb.h [new file with mode: 0644]
lib/dbwrap/wscript_build

diff --git a/lib/dbwrap/dbwrap_ntdb.c b/lib/dbwrap/dbwrap_ntdb.c
new file mode 100644 (file)
index 0000000..5be7b84
--- /dev/null
@@ -0,0 +1,689 @@
+/*
+   Unix SMB/CIFS implementation.
+   Database interface wrapper around ntdb
+   Copyright (C) Volker Lendecke 2005-2007
+   Copyright (C) Rusty Russell 2012
+
+   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"
+#include "dbwrap/dbwrap_ntdb.h"
+#include "system/filesys.h"
+#include "lib/util/util_ntdb.h"
+#include "ccan/str/str.h"
+
+struct db_ntdb_ctx {
+       struct ntdb_context *ntdb;
+
+       struct {
+               dev_t dev;
+               ino_t ino;
+       } id;
+};
+
+static int tdb_store_flag_to_ntdb(int tdb_flag)
+{
+       switch (tdb_flag) {
+       /* In fact, any value defaults to TDB_REPLACE in tdb! */
+       case 0:
+       case TDB_REPLACE:
+               return NTDB_REPLACE;
+       case TDB_INSERT:
+               return NTDB_INSERT;
+       case TDB_MODIFY:
+               return NTDB_MODIFY;
+       default:
+               smb_panic("unknown tdb_flag");
+       }
+}
+
+static NTSTATUS db_ntdb_store(struct db_record *rec, NTDB_DATA data, int flag)
+{
+       int ntdb_flag = tdb_store_flag_to_ntdb(flag);
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+                                                       struct db_ntdb_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.
+        */
+
+       if (ntdb_store(ctx->ntdb, rec->key, data, ntdb_flag) == NTDB_SUCCESS) {
+               return NT_STATUS_OK;
+       }
+       return NT_STATUS_UNSUCCESSFUL;
+}
+
+static NTSTATUS db_ntdb_delete(struct db_record *rec)
+{
+       enum NTDB_ERROR err;
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+                                                      struct db_ntdb_ctx);
+
+       err = ntdb_delete(ctx->ntdb, rec->key);
+       if (err == NTDB_SUCCESS) {
+               return NT_STATUS_OK;
+       }
+
+       if (err == NTDB_ERR_NOEXIST) {
+               return NT_STATUS_NOT_FOUND;
+       }
+
+       return NT_STATUS_UNSUCCESSFUL;
+}
+
+static void db_ntdb_log_key(const char *prefix, NTDB_DATA key)
+{
+       size_t len;
+       char *keystr;
+
+       if (DEBUGLEVEL < 10) {
+               return;
+       }
+       len = key.dsize;
+       if (DEBUGLEVEL == 10) {
+               /*
+                * Only fully spam at debuglevel > 10
+                */
+               len = MIN(10, key.dsize);
+       }
+       keystr = hex_encode_talloc(talloc_tos(), (unsigned char *)(key.dptr),
+                                  len);
+       DEBUG(10, ("%s key %s\n", prefix, keystr));
+       TALLOC_FREE(keystr);
+}
+
+static int db_ntdb_record_destr(struct db_record* data)
+{
+       struct db_ntdb_ctx *ctx =
+               talloc_get_type_abort(data->private_data, struct db_ntdb_ctx);
+
+       db_ntdb_log_key("Unlocking", data->key);
+       ntdb_chainunlock(ctx->ntdb, data->key);
+       return 0;
+}
+
+struct ntdb_fetch_locked_state {
+       TALLOC_CTX *mem_ctx;
+       struct db_record *result;
+};
+
+static enum NTDB_ERROR db_ntdb_fetchlock_parse(NTDB_DATA key, NTDB_DATA data,
+                                              struct ntdb_fetch_locked_state *state)
+{
+       struct db_record *result;
+
+       result = (struct db_record *)talloc_size(
+               state->mem_ctx,
+               sizeof(struct db_record) + key.dsize + data.dsize);
+
+       if (result == NULL) {
+               return NTDB_ERR_OOM;
+       }
+       state->result = result;
+
+       result->key.dsize = key.dsize;
+       result->key.dptr = ((uint8_t *)result) + sizeof(struct db_record);
+       memcpy(result->key.dptr, key.dptr, key.dsize);
+
+       result->value.dsize = data.dsize;
+
+       if (data.dsize > 0) {
+               result->value.dptr = result->key.dptr+key.dsize;
+               memcpy(result->value.dptr, data.dptr, data.dsize);
+       }
+       else {
+               result->value.dptr = NULL;
+       }
+
+       return NTDB_SUCCESS;
+}
+
+static struct db_record *db_ntdb_fetch_locked_internal(
+       struct db_context *db, TALLOC_CTX *mem_ctx, NTDB_DATA key)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+                                                       struct db_ntdb_ctx);
+       struct ntdb_fetch_locked_state state;
+       enum NTDB_ERROR err;
+       NTDB_DATA null = { NULL, 0 };
+
+       state.mem_ctx = mem_ctx;
+       state.result = NULL;
+
+       err = ntdb_parse_record(ctx->ntdb, key, db_ntdb_fetchlock_parse,
+                               &state);
+       if (err != NTDB_SUCCESS && err != NTDB_ERR_NOEXIST) {
+               ntdb_chainunlock(ctx->ntdb, key);
+               return NULL;
+       }
+
+       if (state.result == NULL) {
+               db_ntdb_fetchlock_parse(key, null, &state);
+       }
+
+       if (state.result == NULL) {
+               ntdb_chainunlock(ctx->ntdb, key);
+               return NULL;
+       }
+
+       talloc_set_destructor(state.result, db_ntdb_record_destr);
+
+       state.result->private_data = talloc_reference(state.result, ctx);
+       state.result->store = db_ntdb_store;
+       state.result->delete_rec = db_ntdb_delete;
+
+       DEBUG(10, ("Allocated locked data 0x%p\n", state.result));
+
+       return state.result;
+}
+
+static struct db_record *db_ntdb_fetch_locked(
+       struct db_context *db, TALLOC_CTX *mem_ctx, NTDB_DATA key)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+                                                      struct db_ntdb_ctx);
+
+       db_ntdb_log_key("Locking", key);
+       if (ntdb_chainlock(ctx->ntdb, key) != 0) {
+               DEBUG(3, ("ntdb_chainlock failed\n"));
+               return NULL;
+       }
+       return db_ntdb_fetch_locked_internal(db, mem_ctx, key);
+}
+
+/* Proxy which sets waitflag to false so we never block. */
+static int lock_nonblock(int fd, int rw, off_t off, off_t len, bool waitflag,
+                        void *_orig)
+{
+       struct ntdb_attribute_flock *orig = _orig;
+
+       return orig->lock(fd, rw, off, len, false, orig->data);
+}
+
+static enum NTDB_ERROR enable_nonblock(struct ntdb_context *ntdb,
+                                      union ntdb_attribute *orig)
+{
+       union ntdb_attribute locking;
+       enum NTDB_ERROR ecode;
+
+       orig->base.attr = NTDB_ATTRIBUTE_FLOCK;
+       ecode = ntdb_get_attribute(ntdb, orig);
+       if (ecode != NTDB_SUCCESS) {
+               return ecode;
+       }
+
+       /* Replace locking function with our own. */
+       locking = *orig;
+       locking.flock.data = orig;
+       locking.flock.lock = lock_nonblock;
+
+       return ntdb_set_attribute(ntdb, &locking);
+}
+
+static void disable_nonblock(struct ntdb_context *ntdb)
+{
+       ntdb_unset_attribute(ntdb, NTDB_ATTRIBUTE_FLOCK);
+}
+
+static enum NTDB_ERROR ntdb_chainlock_nonblock(struct ntdb_context *ntdb,
+                                              NTDB_DATA key)
+{
+       union ntdb_attribute orig;
+       enum NTDB_ERROR ecode;
+
+       ecode = enable_nonblock(ntdb, &orig);
+       if (!ecode) {
+               ecode = ntdb_chainlock(ntdb, key);
+               disable_nonblock(ntdb);
+       }
+       return ecode;
+}
+
+static struct db_record *db_ntdb_try_fetch_locked(
+       struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+                                                      struct db_ntdb_ctx);
+
+       db_ntdb_log_key("Trying to lock", key);
+       if (ntdb_chainlock_nonblock(ctx->ntdb, key) != 0) {
+               DEBUG(3, ("ntdb_chainlock_nonblock failed\n"));
+               return NULL;
+       }
+       return db_ntdb_fetch_locked_internal(db, mem_ctx, key);
+}
+
+static struct flock flock_struct;
+
+/* Return a value which is none of v1, v2 or v3. */
+static inline short int invalid_value(short int v1, short int v2, short int v3)
+{
+       short int try = (v1+v2+v3)^((v1+v2+v3) << 16);
+       while (try == v1 || try == v2 || try == v3)
+               try++;
+       return try;
+}
+
+/* We invalidate in as many ways as we can, so the OS rejects it */
+static void invalidate_flock_struct(int signum)
+{
+       flock_struct.l_type = invalid_value(F_RDLCK, F_WRLCK, F_UNLCK);
+       flock_struct.l_whence = invalid_value(SEEK_SET, SEEK_CUR, SEEK_END);
+       flock_struct.l_start = -1;
+       /* A large negative. */
+       flock_struct.l_len = (((off_t)1 << (sizeof(off_t)*CHAR_BIT - 1)) + 1);
+}
+
+static int timeout_lock(int fd, int rw, off_t off, off_t len, bool waitflag,
+                       void *_timeout)
+{
+       int ret, saved_errno;
+       unsigned int timeout = *(unsigned int *)_timeout;
+
+       flock_struct.l_type = rw;
+       flock_struct.l_whence = SEEK_SET;
+       flock_struct.l_start = off;
+       flock_struct.l_len = len;
+
+       CatchSignal(SIGALRM, invalidate_flock_struct);
+       alarm(timeout);
+
+       for (;;) {
+               if (waitflag)
+                       ret = fcntl(fd, F_SETLKW, &flock_struct);
+               else
+                       ret = fcntl(fd, F_SETLK, &flock_struct);
+
+               if (ret == 0)
+                       break;
+
+               /* Not signalled?  Something else went wrong. */
+               if (flock_struct.l_len == len) {
+                       if (errno == EAGAIN || errno == EINTR)
+                               continue;
+                       saved_errno = errno;
+                       break;
+               } else {
+                       saved_errno = EINTR;
+                       break;
+               }
+       }
+
+       alarm(0);
+       errno = saved_errno;
+       return ret;
+}
+
+static int ntdb_chainlock_timeout(struct ntdb_context *ntdb,
+                                 NTDB_DATA key,
+                                 unsigned int timeout)
+{
+       union ntdb_attribute locking;
+       enum NTDB_ERROR ecode;
+
+       locking.base.attr = NTDB_ATTRIBUTE_FLOCK;
+       ecode = ntdb_get_attribute(ntdb, &locking);
+       if (ecode != NTDB_SUCCESS) {
+               return -1;
+       }
+
+       /* Replace locking function with our own. */
+       locking.flock.data = &timeout;
+       locking.flock.lock = timeout_lock;
+
+       ecode = ntdb_set_attribute(ntdb, &locking);
+       if (ecode != NTDB_SUCCESS) {
+               return -1;
+       }
+
+       ecode = ntdb_chainlock(ntdb, key);
+
+       ntdb_unset_attribute(ntdb, NTDB_ATTRIBUTE_FLOCK);
+       return ecode == NTDB_SUCCESS ? 0 : -1;
+}
+
+static struct db_record *db_ntdb_fetch_locked_timeout(
+       struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key,
+       unsigned int timeout)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+                                                      struct db_ntdb_ctx);
+
+       db_ntdb_log_key("Trying to lock", key);
+       if (ntdb_chainlock_timeout(ctx->ntdb, key, timeout) != 0) {
+               DEBUG(3, ("ntdb_chainlock_timeout failed\n"));
+               return NULL;
+       }
+       return db_ntdb_fetch_locked_internal(db, mem_ctx, key);
+}
+
+
+static int db_ntdb_exists(struct db_context *db, TDB_DATA key)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(
+               db->private_data, struct db_ntdb_ctx);
+       return ntdb_exists(ctx->ntdb, key);
+}
+
+static int db_ntdb_wipe(struct db_context *db)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(
+               db->private_data, struct db_ntdb_ctx);
+       if (ntdb_wipe_all(ctx->ntdb) != NTDB_SUCCESS) {
+               return -1;
+       }
+       return 0;
+}
+
+static int db_ntdb_check(struct db_context *db)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(
+               db->private_data, struct db_ntdb_ctx);
+       if (ntdb_check(ctx->ntdb, NULL, NULL) != NTDB_SUCCESS) {
+               return -1;
+       }
+       return 0;
+}
+
+struct db_ntdb_parse_state {
+       void (*parser)(TDB_DATA key, TDB_DATA data,
+                      void *private_data);
+       void *private_data;
+};
+
+/*
+ * ntdb_parse_record expects a parser returning enum NTDB_ERROR,
+ * mixing up ntdb and parser errors. Wrap around that by always
+ * returning NTDB_SUCCESS and have dbwrap_parse_record expect a parser
+ * returning void.
+ */
+
+static enum NTDB_ERROR db_ntdb_parser(NTDB_DATA key, NTDB_DATA data,
+                                     struct db_ntdb_parse_state *state)
+{
+       state->parser(key, data, state->private_data);
+       return TDB_SUCCESS;
+}
+
+static NTSTATUS db_ntdb_parse(struct db_context *db, TDB_DATA key,
+                             void (*parser)(TDB_DATA key, TDB_DATA data,
+                                            void *private_data),
+                             void *private_data)
+{
+       struct db_ntdb_ctx *ctx = talloc_get_type_abort(
+               db->private_data, struct db_ntdb_ctx);
+       struct db_ntdb_parse_state state;
+       enum NTDB_ERROR err;
+
+       state.parser = parser;
+       state.private_data = private_data;
+
+       err = ntdb_parse_record(ctx->ntdb, key, db_ntdb_parser, &state);
+       return map_nt_error_from_ntdb(err);
+}
+
+struct db_ntdb_traverse_ctx {
+       struct db_context *db;
+       int (*f)(struct db_record *rec, void *private_data);
+       void *private_data;
+};
+
+static int db_ntdb_traverse_func(struct ntdb_context *ntdb,
+                                NTDB_DATA kbuf, NTDB_DATA dbuf,
+                                struct db_ntdb_traverse_ctx *ctx)
+{
+       struct db_record rec;
+
+       rec.key = kbuf;
+       rec.value = dbuf;
+       rec.store = db_ntdb_store;
+       rec.delete_rec = db_ntdb_delete;
+       rec.private_data = ctx->db->private_data;
+       rec.db = ctx->db;
+
+       return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_ntdb_traverse(struct db_context *db,
+                           int (*f)(struct db_record *rec, void *private_data),
+                           void *private_data)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       struct db_ntdb_traverse_ctx ctx;
+       int64_t ret;
+
+       ctx.db = db;
+       ctx.f = f;
+       ctx.private_data = private_data;
+       ret = ntdb_traverse(db_ctx->ntdb, db_ntdb_traverse_func, &ctx);
+
+       if (ret < 0) {
+               return -1;
+       }
+
+       /* Make sure we don't truncate! */
+       if ((int)ret != ret) {
+               ret = INT_MAX;
+       }
+       return ret;
+}
+
+static NTSTATUS db_ntdb_store_deny(struct db_record *rec, NTDB_DATA data, int flag)
+{
+       return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static NTSTATUS db_ntdb_delete_deny(struct db_record *rec)
+{
+       return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static int db_ntdb_traverse_read_func(struct ntdb_context *ntdb,
+                                     NTDB_DATA kbuf, NTDB_DATA dbuf,
+                                     struct db_ntdb_traverse_ctx *ctx)
+{
+       struct db_record rec;
+
+       rec.key = kbuf;
+       rec.value = dbuf;
+       rec.store = db_ntdb_store_deny;
+       rec.delete_rec = db_ntdb_delete_deny;
+       rec.private_data = ctx->db->private_data;
+       rec.db = ctx->db;
+
+       return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_ntdb_traverse_read(struct db_context *db,
+                                int (*f)(struct db_record *rec,
+                                         void *private_data),
+                                void *private_data)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       struct db_ntdb_traverse_ctx ctx;
+       int64_t ret;
+
+       ctx.db = db;
+       ctx.f = f;
+       ctx.private_data = private_data;
+
+       /* This is a bit of paranoia to check that f() isn't altering
+        * database. */
+       if (ntdb_get_flags(db_ctx->ntdb) & NTDB_RDONLY) {
+               ret = ntdb_traverse(db_ctx->ntdb, db_ntdb_traverse_read_func,
+                                   &ctx);
+       } else {
+               ntdb_add_flag(db_ctx->ntdb, NTDB_RDONLY);
+               ret = ntdb_traverse(db_ctx->ntdb, db_ntdb_traverse_read_func,
+                                   &ctx);
+               ntdb_remove_flag(db_ctx->ntdb, NTDB_RDONLY);
+       }
+
+       if (ret < 0) {
+               return -1;
+       }
+
+       /* Make sure we don't truncate! */
+       if ((int)ret != ret) {
+               ret = INT_MAX;
+       }
+       return ret;
+}
+
+static int db_ntdb_get_seqnum(struct db_context *db)
+
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       return ntdb_get_seqnum(db_ctx->ntdb);
+}
+
+static int db_ntdb_transaction_start(struct db_context *db)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       return ntdb_transaction_start(db_ctx->ntdb) == NTDB_SUCCESS ? 0 : -1;
+}
+
+static NTSTATUS db_ntdb_transaction_start_nonblock(struct db_context *db)
+{
+       union ntdb_attribute orig;
+       enum NTDB_ERROR ecode;
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+
+       ecode = enable_nonblock(db_ctx->ntdb, &orig);
+       if (!ecode) {
+               ecode = ntdb_transaction_start(db_ctx->ntdb);
+               disable_nonblock(db_ctx->ntdb);
+       }
+       return map_nt_error_from_ntdb(ecode);
+}
+
+static int db_ntdb_transaction_commit(struct db_context *db)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       return ntdb_transaction_commit(db_ctx->ntdb) == NTDB_SUCCESS ? 0 : -1;
+}
+
+static int db_ntdb_transaction_cancel(struct db_context *db)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       ntdb_transaction_cancel(db_ctx->ntdb);
+       return 0;
+}
+
+static void db_ntdb_id(struct db_context *db, const uint8_t **id, size_t *idlen)
+{
+       struct db_ntdb_ctx *db_ctx =
+               talloc_get_type_abort(db->private_data, struct db_ntdb_ctx);
+       *id = (uint8_t *)&db_ctx->id;
+       *idlen = sizeof(db_ctx->id);
+}
+
+/* Don't ask this to open a .tdb file: dbwrap_local_open will catch that. */
+struct db_context *db_open_ntdb(TALLOC_CTX *mem_ctx,
+                               struct loadparm_context *lp_ctx,
+                               const char *ntdbname,
+                               int hash_size, int ntdb_flags,
+                               int open_flags, mode_t mode,
+                               enum dbwrap_lock_order lock_order)
+{
+       struct db_context *result = NULL;
+       struct db_ntdb_ctx *db_ntdb;
+       struct stat st;
+       union ntdb_attribute hattr;
+
+       if ((ntdb_flags & NTDB_INTERNAL) && !ntdbname) {
+               ntdbname = "unnamed";
+       }
+
+       /* Extra paranoia. */
+       if (strends(ntdbname, ".tdb")) {
+               DEBUG(0, ("can't try to open %s with ntdb!", ntdbname));
+               return NULL;
+       }
+
+       /* We only use this if hsize is non-zero. */
+       hattr.base.attr = NTDB_ATTRIBUTE_HASHSIZE;
+       hattr.base.next = NULL;
+       hattr.hashsize.size = hash_size;
+
+       result = talloc_zero(mem_ctx, struct db_context);
+       if (result == NULL) {
+               DEBUG(0, ("talloc failed\n"));
+               goto fail;
+       }
+
+       result->private_data = db_ntdb = talloc(result, struct db_ntdb_ctx);
+       if (db_ntdb == NULL) {
+               DEBUG(0, ("talloc failed\n"));
+               goto fail;
+       }
+       result->lock_order = lock_order;
+
+       db_ntdb->ntdb = ntdb_new(db_ntdb, ntdbname, ntdb_flags,
+                                open_flags, mode,
+                                hash_size ? &hattr : NULL, lp_ctx);
+       if (db_ntdb->ntdb == NULL) {
+               DEBUG(3, ("Could not open ntdb %s: %s\n",
+                         ntdbname, strerror(errno)));
+               goto fail;
+       }
+
+       ZERO_STRUCT(db_ntdb->id);
+
+       if (fstat(ntdb_fd(db_ntdb->ntdb), &st) == -1) {
+               DEBUG(3, ("fstat failed: %s\n", strerror(errno)));
+               goto fail;
+       }
+       db_ntdb->id.dev = st.st_dev;
+       db_ntdb->id.ino = st.st_ino;
+
+       result->fetch_locked = db_ntdb_fetch_locked;
+       result->fetch_locked_timeout = db_ntdb_fetch_locked_timeout;
+       result->try_fetch_locked = db_ntdb_try_fetch_locked;
+       result->traverse = db_ntdb_traverse;
+       result->traverse_read = db_ntdb_traverse_read;
+       result->parse_record = db_ntdb_parse;
+       result->get_seqnum = db_ntdb_get_seqnum;
+       result->persistent = ((ntdb_flags & NTDB_CLEAR_IF_FIRST) == 0);
+       result->transaction_start = db_ntdb_transaction_start;
+       result->transaction_start_nonblock = db_ntdb_transaction_start_nonblock;
+       result->transaction_commit = db_ntdb_transaction_commit;
+       result->transaction_cancel = db_ntdb_transaction_cancel;
+       result->exists = db_ntdb_exists;
+       result->wipe = db_ntdb_wipe;
+       result->id = db_ntdb_id;
+       result->check = db_ntdb_check;
+       result->stored_callback = NULL;
+       result->name = ntdb_name(db_ntdb->ntdb);
+       result->hash_size = hash_size;
+       return result;
+
+ fail:
+       if (result != NULL) {
+               TALLOC_FREE(result);
+       }
+       return NULL;
+}
diff --git a/lib/dbwrap/dbwrap_ntdb.h b/lib/dbwrap/dbwrap_ntdb.h
new file mode 100644 (file)
index 0000000..b00a567
--- /dev/null
@@ -0,0 +1,35 @@
+/*
+   Unix SMB/CIFS implementation.
+   Database interface wrapper around ntdb
+   Copyright (C) Volker Lendecke 2005-2007
+   Copyright (C) Rusty Russell 2012
+
+   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_NTDB_H__
+#define __DBWRAP_NTDB_H__
+
+#include <talloc.h>
+
+struct db_context;
+
+struct db_context *db_open_ntdb(TALLOC_CTX *mem_ctx,
+                               struct loadparm_context *lp_ctx,
+                               const char *name,
+                               int hash_size, int ntdb_flags,
+                               int open_flags, mode_t mode,
+                               enum dbwrap_lock_order lock_order);
+
+#endif /* __DBWRAP_NTDB_H__ */
index 3b247b3..83572cb 100644 (file)
@@ -1,12 +1,12 @@
+SRC = '''dbwrap.c dbwrap_util.c dbwrap_rbt.c dbwrap_cache.c dbwrap_tdb.c
+         dbwrap_local_open.c'''
+DEPS= '''samba-util util_tdb errors tdb tdb-wrap'''
+
+if not bld.env.disable_ntdb:
+   SRC += " dbwrap_ntdb.c"
+   DEPS += " util_ntdb"
+
 bld.SAMBA_LIBRARY('dbwrap',
-                  source='''
-                  dbwrap.c
-                  dbwrap_util.c
-                  dbwrap_rbt.c
-                  dbwrap_cache.c
-                  dbwrap_tdb.c
-                  dbwrap_local_open.c
-                  ''',
-                  deps='samba-util util_tdb errors tdb tdb-wrap',
+                  source=SRC,
+                  deps=DEPS,
                   private_library=True)
-