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authorAlexander Bokovoy <ab@samba.org>2008-01-16 12:27:29 +0300
committerAlexander Bokovoy <ab@samba.org>2008-01-16 12:27:29 +0300
commit3bd3483fab4b55c36c276ccaf607a5ed3f1c6f29 (patch)
tree821f2b02e32b362551bebe01239a629777071ffc /source3
parente633e4ddab68212b47f9ce44d8194007f245b5f1 (diff)
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idmap TDB2 backend, used for clustered Samba setups.
This uses 2 tdb files. One is permanent, and is in shared storage on the cluster (using "tdb:idmap2.tdb =" in smb.conf). The other is a temporary cache tdb on local storage. Signed-off-by: Alexander Bokovoy <ab@samba.org>(This used to be commit b6df7e7709365fb620867ad8954bc5bf24496775)
Diffstat (limited to 'source3')
-rw-r--r--source3/winbindd/idmap_tdb2.c1014
1 files changed, 1014 insertions, 0 deletions
diff --git a/source3/winbindd/idmap_tdb2.c b/source3/winbindd/idmap_tdb2.c
new file mode 100644
index 0000000000..fa106aa134
--- /dev/null
+++ b/source3/winbindd/idmap_tdb2.c
@@ -0,0 +1,1014 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ idmap TDB2 backend, used for clustered Samba setups.
+
+ This uses 2 tdb files. One is permanent, and is in shared storage
+ on the cluster (using "tdb:idmap2.tdb =" in smb.conf). The other is a
+ temporary cache tdb on local storage.
+
+ Copyright (C) Andrew Tridgell 2007
+
+ This is heavily based upon idmap_tdb.c, which is:
+
+ Copyright (C) Tim Potter 2000
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+ Copyright (C) Jeremy Allison 2006
+ Copyright (C) Simo Sorce 2003-2006
+
+ 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 "winbindd.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_IDMAP
+
+/* High water mark keys */
+#define HWM_GROUP "GROUP HWM"
+#define HWM_USER "USER HWM"
+
+static struct idmap_tdb2_state {
+ /* User and group id pool */
+ uid_t low_uid, high_uid; /* Range of uids to allocate */
+ gid_t low_gid, high_gid; /* Range of gids to allocate */
+ const char *idmap_script;
+} idmap_tdb2_state;
+
+
+
+/* tdb context for the local cache tdb */
+static TDB_CONTEXT *idmap_tdb2_tmp;
+
+/* handle to the permanent tdb */
+static struct db_context *idmap_tdb2_perm;
+
+/*
+ open the cache tdb
+ */
+static NTSTATUS idmap_tdb2_open_cache_db(void)
+{
+ const char *db_path;
+
+ if (idmap_tdb2_tmp) {
+ /* its already open */
+ return NT_STATUS_OK;
+ }
+
+ db_path = lock_path("idmap2_cache.tdb");
+
+ /* Open idmap repository */
+ if (!(idmap_tdb2_tmp = tdb_open_log(db_path, 0, TDB_CLEAR_IF_FIRST, O_RDWR|O_CREAT, 0644))) {
+ DEBUG(0, ("Unable to open cache idmap database '%s'\n", db_path));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+static NTSTATUS idmap_tdb2_alloc_load(void);
+
+/*
+ open the permanent tdb
+ */
+static NTSTATUS idmap_tdb2_open_perm_db(void)
+{
+ char *db_path;
+
+ if (idmap_tdb2_perm) {
+ /* its already open */
+ return NT_STATUS_OK;
+ }
+
+ db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
+ if (db_path == NULL) {
+ /* fall back to the private directory, which, despite
+ its name, is usually on shared storage */
+ db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
+ }
+ NT_STATUS_HAVE_NO_MEMORY(db_path);
+
+ /* Open idmap repository */
+ idmap_tdb2_perm = db_open(NULL, db_path, 0, TDB_DEFAULT,
+ O_RDWR|O_CREAT, 0644);
+ TALLOC_FREE(db_path);
+
+ if (idmap_tdb2_perm == NULL) {
+ DEBUG(0, ("Unable to open permanent idmap database '%s'\n",
+ db_path));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /* load the ranges and high/low water marks */
+ return idmap_tdb2_alloc_load();
+}
+
+
+/*
+ load the idmap allocation ranges and high/low water marks
+*/
+static NTSTATUS idmap_tdb2_alloc_load(void)
+{
+ const char *range;
+ uid_t low_uid = 0;
+ uid_t high_uid = 0;
+ gid_t low_gid = 0;
+ gid_t high_gid = 0;
+
+ /* load ranges */
+ idmap_tdb2_state.low_uid = 0;
+ idmap_tdb2_state.high_uid = 0;
+ idmap_tdb2_state.low_gid = 0;
+ idmap_tdb2_state.high_gid = 0;
+
+ /* see if a idmap script is configured */
+ idmap_tdb2_state.idmap_script = lp_parm_const_string(-1, "idmap", "script", NULL);
+
+ if (idmap_tdb2_state.idmap_script) {
+ DEBUG(1, ("using idmap script '%s'\n", idmap_tdb2_state.idmap_script));
+ }
+
+ range = lp_parm_const_string(-1, "idmap alloc config", "range", NULL);
+ if (range && range[0]) {
+ unsigned low_id, high_id;
+ if (sscanf(range, "%u - %u", &low_id, &high_id) == 2) {
+ if (low_id < high_id) {
+ idmap_tdb2_state.low_gid = idmap_tdb2_state.low_uid = low_id;
+ idmap_tdb2_state.high_gid = idmap_tdb2_state.high_uid = high_id;
+ } else {
+ DEBUG(1, ("ERROR: invalid idmap alloc range [%s]", range));
+ }
+ } else {
+ DEBUG(1, ("ERROR: invalid syntax for idmap alloc config:range [%s]", range));
+ }
+ }
+
+ /* Create high water marks for group and user id */
+ if (lp_idmap_uid(&low_uid, &high_uid)) {
+ idmap_tdb2_state.low_uid = low_uid;
+ idmap_tdb2_state.high_uid = high_uid;
+ }
+
+ if (lp_idmap_gid(&low_gid, &high_gid)) {
+ idmap_tdb2_state.low_gid = low_gid;
+ idmap_tdb2_state.high_gid = high_gid;
+ }
+
+ if (idmap_tdb2_state.high_uid <= idmap_tdb2_state.low_uid) {
+ DEBUG(1, ("idmap uid range missing or invalid\n"));
+ DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
+ return NT_STATUS_UNSUCCESSFUL;
+ } else {
+ uint32 low_id;
+
+ if (((low_id = dbwrap_fetch_int32(idmap_tdb2_perm,
+ HWM_USER)) == -1) ||
+ (low_id < idmap_tdb2_state.low_uid)) {
+ if (dbwrap_store_int32(
+ idmap_tdb2_perm, HWM_USER,
+ idmap_tdb2_state.low_uid) == -1) {
+ DEBUG(0, ("Unable to initialise user hwm in idmap database\n"));
+ return NT_STATUS_INTERNAL_DB_ERROR;
+ }
+ }
+ }
+
+ if (idmap_tdb2_state.high_gid <= idmap_tdb2_state.low_gid) {
+ DEBUG(1, ("idmap gid range missing or invalid\n"));
+ DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
+ return NT_STATUS_UNSUCCESSFUL;
+ } else {
+ uint32 low_id;
+
+ if (((low_id = dbwrap_fetch_int32(idmap_tdb2_perm,
+ HWM_GROUP)) == -1) ||
+ (low_id < idmap_tdb2_state.low_gid)) {
+ if (dbwrap_store_int32(
+ idmap_tdb2_perm, HWM_GROUP,
+ idmap_tdb2_state.low_gid) == -1) {
+ DEBUG(0, ("Unable to initialise group hwm in idmap database\n"));
+ return NT_STATUS_INTERNAL_DB_ERROR;
+ }
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ Initialise idmap alloc database.
+*/
+static NTSTATUS idmap_tdb2_alloc_init(const char *params)
+{
+ /* nothing to do - we want to avoid opening the permanent
+ database if possible. Instead we load the params when we
+ first need it. */
+ return NT_STATUS_OK;
+}
+
+
+/*
+ Allocate a new id.
+*/
+static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
+{
+ bool ret;
+ const char *hwmkey;
+ const char *hwmtype;
+ uint32_t high_hwm;
+ uint32_t hwm;
+ NTSTATUS status;
+
+ status = idmap_tdb2_open_perm_db();
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ /* Get current high water mark */
+ switch (xid->type) {
+
+ case ID_TYPE_UID:
+ hwmkey = HWM_USER;
+ hwmtype = "UID";
+ high_hwm = idmap_tdb2_state.high_uid;
+ break;
+
+ case ID_TYPE_GID:
+ hwmkey = HWM_GROUP;
+ hwmtype = "GID";
+ high_hwm = idmap_tdb2_state.high_gid;
+ break;
+
+ default:
+ DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if ((hwm = dbwrap_fetch_int32(idmap_tdb2_perm, hwmkey)) == -1) {
+ return NT_STATUS_INTERNAL_DB_ERROR;
+ }
+
+ /* check it is in the range */
+ if (hwm > high_hwm) {
+ DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
+ hwmtype, (unsigned long)high_hwm));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /* fetch a new id and increment it */
+ ret = dbwrap_change_uint32_atomic(idmap_tdb2_perm, hwmkey, &hwm, 1);
+ if (ret == -1) {
+ DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /* recheck it is in the range */
+ if (hwm > high_hwm) {
+ DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
+ hwmtype, (unsigned long)high_hwm));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ xid->id = hwm;
+ DEBUG(10,("New %s = %d\n", hwmtype, hwm));
+
+ return NT_STATUS_OK;
+}
+
+/*
+ Get current highest id.
+*/
+static NTSTATUS idmap_tdb2_get_hwm(struct unixid *xid)
+{
+ const char *hwmkey;
+ const char *hwmtype;
+ uint32_t hwm;
+ uint32_t high_hwm;
+
+ /* Get current high water mark */
+ switch (xid->type) {
+
+ case ID_TYPE_UID:
+ hwmkey = HWM_USER;
+ hwmtype = "UID";
+ high_hwm = idmap_tdb2_state.high_uid;
+ break;
+
+ case ID_TYPE_GID:
+ hwmkey = HWM_GROUP;
+ hwmtype = "GID";
+ high_hwm = idmap_tdb2_state.high_gid;
+ break;
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if ((hwm = dbwrap_fetch_int32(idmap_tdb2_perm, hwmkey)) == -1) {
+ return NT_STATUS_INTERNAL_DB_ERROR;
+ }
+
+ xid->id = hwm;
+
+ /* Warn if it is out of range */
+ if (hwm >= high_hwm) {
+ DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
+ hwmtype, (unsigned long)high_hwm));
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ Set high id.
+*/
+static NTSTATUS idmap_tdb2_set_hwm(struct unixid *xid)
+{
+ /* not supported, or we would invalidate the cache tdb on
+ other nodes */
+ DEBUG(0,("idmap_tdb2_set_hwm not supported\n"));
+ return NT_STATUS_NOT_SUPPORTED;
+}
+
+/*
+ Close the alloc tdb
+*/
+static NTSTATUS idmap_tdb2_alloc_close(void)
+{
+ /* don't actually close it */
+ return NT_STATUS_OK;
+}
+
+/*
+ IDMAP MAPPING TDB BACKEND
+*/
+struct idmap_tdb2_context {
+ uint32_t filter_low_id;
+ uint32_t filter_high_id;
+};
+
+/*
+ try fetching from the cache tdb, and if that fails then
+ fetch from the permanent tdb
+ */
+static TDB_DATA tdb2_fetch_bystring(TALLOC_CTX *mem_ctx, const char *keystr)
+{
+ TDB_DATA ret;
+ NTSTATUS status;
+
+ ret = tdb_fetch_bystring(idmap_tdb2_tmp, keystr);
+ if (ret.dptr != NULL) {
+ /* got it from cache */
+ unsigned char *tmp;
+
+ tmp = (unsigned char *)talloc_memdup(mem_ctx, ret.dptr,
+ ret.dsize);
+ SAFE_FREE(ret.dptr);
+ ret.dptr = tmp;
+
+ if (ret.dptr == NULL) {
+ return make_tdb_data(NULL, 0);
+ }
+ return ret;
+ }
+
+ status = idmap_tdb2_open_perm_db();
+ if (!NT_STATUS_IS_OK(status)) {
+ return ret;
+ }
+
+ /* fetch from the permanent tdb */
+ return dbwrap_fetch_bystring(idmap_tdb2_perm, mem_ctx, keystr);
+}
+
+/*
+ store into both databases
+ */
+static NTSTATUS tdb2_store_bystring(const char *keystr, TDB_DATA data, int flags)
+{
+ NTSTATUS ret;
+ NTSTATUS status = idmap_tdb2_open_perm_db();
+ if (!NT_STATUS_IS_OK(status)) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ ret = dbwrap_store_bystring(idmap_tdb2_perm, keystr, data, flags);
+ if (!NT_STATUS_IS_OK(ret)) {
+ ret = tdb_store_bystring(idmap_tdb2_tmp, keystr, data, flags) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+ }
+ return ret;
+}
+
+/*
+ delete from both databases
+ */
+static NTSTATUS tdb2_delete_bystring(const char *keystr)
+{
+ NTSTATUS ret;
+ NTSTATUS status = idmap_tdb2_open_perm_db();
+ if (!NT_STATUS_IS_OK(status)) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ ret = dbwrap_delete_bystring(idmap_tdb2_perm, keystr);
+ if (!NT_STATUS_IS_OK(ret)) {
+ ret = tdb_delete_bystring(idmap_tdb2_tmp, keystr) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+ }
+ return ret;
+}
+
+/*
+ Initialise idmap database.
+*/
+static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom)
+{
+ NTSTATUS ret;
+ struct idmap_tdb2_context *ctx;
+ char *config_option = NULL;
+ const char *range;
+ NTSTATUS status;
+
+ status = idmap_tdb2_open_cache_db();
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ ctx = talloc(dom, struct idmap_tdb2_context);
+ if ( ! ctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
+ if ( ! config_option) {
+ DEBUG(0, ("Out of memory!\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ range = lp_parm_const_string(-1, config_option, "range", NULL);
+ if (( ! range) ||
+ (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
+ (ctx->filter_low_id > ctx->filter_high_id)) {
+ ctx->filter_low_id = 0;
+ ctx->filter_high_id = 0;
+ }
+
+ dom->private_data = ctx;
+ dom->initialized = True;
+
+ talloc_free(config_option);
+ return NT_STATUS_OK;
+
+failed:
+ talloc_free(ctx);
+ return ret;
+}
+
+
+/*
+ run a script to perform a mapping
+
+ The script should the following command lines:
+
+ SIDTOID S-1-xxxx
+ IDTOSID UID xxxx
+ IDTOSID GID xxxx
+
+ and should return one of the following as a single line of text
+ UID:xxxx
+ GID:xxxx
+ SID:xxxx
+ ERR:xxxx
+ */
+static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
+ const char *fmt, ...)
+{
+ va_list ap;
+ char *cmd;
+ FILE *p;
+ char line[64];
+ unsigned long v;
+
+ cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
+ NT_STATUS_HAVE_NO_MEMORY(cmd);
+
+ va_start(ap, fmt);
+ cmd = talloc_vasprintf_append(cmd, fmt, ap);
+ va_end(ap);
+ NT_STATUS_HAVE_NO_MEMORY(cmd);
+
+ p = popen(cmd, "r");
+ talloc_free(cmd);
+ if (p == NULL) {
+ return NT_STATUS_NONE_MAPPED;
+ }
+
+ if (fgets(line, sizeof(line)-1, p) == NULL) {
+ pclose(p);
+ return NT_STATUS_NONE_MAPPED;
+ }
+ pclose(p);
+
+ DEBUG(10,("idmap script gave: %s\n", line));
+
+ if (sscanf(line, "UID:%lu", &v) == 1) {
+ map->xid.id = v;
+ map->xid.type = ID_TYPE_UID;
+ } else if (sscanf(line, "GID:%lu", &v) == 1) {
+ map->xid.id = v;
+ map->xid.type = ID_TYPE_GID;
+ } else if (strncmp(line, "SID:S-", 6) == 0) {
+ if (!string_to_sid(map->sid, &line[4])) {
+ DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
+ line, idmap_tdb2_state.idmap_script));
+ return NT_STATUS_NONE_MAPPED;
+ }
+ } else {
+ DEBUG(0,("Bad reply '%s' from idmap script %s\n",
+ line, idmap_tdb2_state.idmap_script));
+ return NT_STATUS_NONE_MAPPED;
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+
+/*
+ Single id to sid lookup function.
+*/
+static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
+{
+ NTSTATUS ret;
+ TDB_DATA data;
+ char *keystr;
+
+ if (!ctx || !map) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* apply filters before checking */
+ if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
+ (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
+ map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
+ return NT_STATUS_NONE_MAPPED;
+ }
+
+ switch (map->xid.type) {
+
+ case ID_TYPE_UID:
+ keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
+ break;
+
+ case ID_TYPE_GID:
+ keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
+ break;
+
+ default:
+ DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* final SAFE_FREE safe */
+ data.dptr = NULL;
+
+ if (keystr == NULL) {
+ DEBUG(0, ("Out of memory!\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ DEBUG(10,("Fetching record %s\n", keystr));
+
+ /* Check if the mapping exists */
+ data = tdb2_fetch_bystring(keystr, keystr);
+
+ if (!data.dptr) {
+ fstring sidstr;
+
+ DEBUG(10,("Record %s not found\n", keystr));
+ if (idmap_tdb2_state.idmap_script == NULL) {
+ ret = NT_STATUS_NONE_MAPPED;
+ goto done;
+ }
+
+ ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
+
+ /* store it on shared storage */
+ if (!NT_STATUS_IS_OK(ret)) {
+ goto done;
+ }
+
+ if (sid_to_string(sidstr, map->sid)) {
+ /* both forward and reverse mappings */
+ tdb2_store_bystring(keystr,
+ string_term_tdb_data(sidstr),
+ TDB_REPLACE);
+ tdb2_store_bystring(sidstr,
+ string_term_tdb_data(keystr),
+ TDB_REPLACE);
+ }
+ goto done;
+ }
+
+ if (!string_to_sid(map->sid, (const char *)data.dptr)) {
+ DEBUG(10,("INVALID SID (%s) in record %s\n",
+ (const char *)data.dptr, keystr));
+ ret = NT_STATUS_INTERNAL_DB_ERROR;
+ goto done;
+ }
+
+ DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
+ ret = NT_STATUS_OK;
+
+done:
+ talloc_free(keystr);
+ return ret;
+}
+
+
+/*
+ Single sid to id lookup function.
+*/
+static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
+{
+ NTSTATUS ret;
+ TDB_DATA data;
+ char *keystr;
+ unsigned long rec_id = 0;
+
+ if ((keystr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
+ DEBUG(0, ("Out of memory!\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ DEBUG(10,("Fetching record %s\n", keystr));
+
+ /* Check if sid is present in database */
+ data = tdb2_fetch_bystring(keystr, keystr);
+ if (!data.dptr) {
+ fstring idstr;
+
+ DEBUG(10,(__location__ " Record %s not found\n", keystr));
+
+ if (idmap_tdb2_state.idmap_script == NULL) {
+ ret = NT_STATUS_NONE_MAPPED;
+ goto done;
+ }
+
+ ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
+ /* store it on shared storage */
+ if (!NT_STATUS_IS_OK(ret)) {
+ goto done;
+ }
+
+ snprintf(idstr, sizeof(idstr), "%cID %lu",
+ map->xid.type == ID_TYPE_UID?'U':'G',
+ (unsigned long)map->xid.id);
+ /* store both forward and reverse mappings */
+ tdb2_store_bystring(keystr, string_term_tdb_data(idstr),
+ TDB_REPLACE);
+ tdb2_store_bystring(idstr, string_term_tdb_data(keystr),
+ TDB_REPLACE);
+ goto done;
+ }
+
+ /* What type of record is this ? */
+ if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
+ map->xid.id = rec_id;
+ map->xid.type = ID_TYPE_UID;
+ DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
+ ret = NT_STATUS_OK;
+
+ } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
+ map->xid.id = rec_id;
+ map->xid.type = ID_TYPE_GID;
+ DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
+ ret = NT_STATUS_OK;
+
+ } else { /* Unknown record type ! */
+ DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
+ ret = NT_STATUS_INTERNAL_DB_ERROR;
+ }
+
+ /* apply filters before returning result */
+ if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
+ (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
+ map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
+ ret = NT_STATUS_NONE_MAPPED;
+ }
+
+done:
+ talloc_free(keystr);
+ return ret;
+}
+
+/*
+ lookup a set of unix ids.
+*/
+static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
+{
+ struct idmap_tdb2_context *ctx;
+ NTSTATUS ret;
+ int i;
+
+ /* make sure we initialized */
+ if ( ! dom->initialized) {
+ ret = idmap_tdb2_db_init(dom);
+ if ( ! NT_STATUS_IS_OK(ret)) {
+ return ret;
+ }
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
+
+ for (i = 0; ids[i]; i++) {
+ ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
+ if ( ! NT_STATUS_IS_OK(ret)) {
+
+ /* if it is just a failed mapping continue */
+ if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
+
+ /* make sure it is marked as unmapped */
+ ids[i]->status = ID_UNMAPPED;
+ continue;
+ }
+
+ /* some fatal error occurred, return immediately */
+ goto done;
+ }
+
+ /* all ok, id is mapped */
+ ids[i]->status = ID_MAPPED;
+ }
+
+ ret = NT_STATUS_OK;
+
+done:
+ return ret;
+}
+
+/*
+ lookup a set of sids.
+*/
+static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
+{
+ struct idmap_tdb2_context *ctx;
+ NTSTATUS ret;
+ int i;
+
+ /* make sure we initialized */
+ if ( ! dom->initialized) {
+ ret = idmap_tdb2_db_init(dom);
+ if ( ! NT_STATUS_IS_OK(ret)) {
+ return ret;
+ }
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
+
+ for (i = 0; ids[i]; i++) {
+ ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
+ if ( ! NT_STATUS_IS_OK(ret)) {
+
+ /* if it is just a failed mapping continue */
+ if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
+
+ /* make sure it is marked as unmapped */
+ ids[i]->status = ID_UNMAPPED;
+ continue;
+ }
+
+ /* some fatal error occurred, return immediately */
+ goto done;
+ }
+
+ /* all ok, id is mapped */
+ ids[i]->status = ID_MAPPED;
+ }
+
+ ret = NT_STATUS_OK;
+
+done:
+ return ret;
+}
+
+
+/*
+ set a mapping.
+*/
+static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
+{
+ struct idmap_tdb2_context *ctx;
+ NTSTATUS ret;
+ TDB_DATA data;
+ char *ksidstr, *kidstr;
+ struct db_record *update_lock = NULL;
+ struct db_record *rec = NULL;
+
+ /* make sure we initialized */
+ if ( ! dom->initialized) {
+ ret = idmap_tdb2_db_init(dom);
+ if ( ! NT_STATUS_IS_OK(ret)) {
+ return ret;
+ }
+ }
+
+ if (!map || !map->sid) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ksidstr = kidstr = NULL;
+ data.dptr = NULL;
+
+ /* TODO: should we filter a set_mapping using low/high filters ? */
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
+
+ switch (map->xid.type) {
+
+ case ID_TYPE_UID:
+ kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
+ break;
+
+ case ID_TYPE_GID:
+ kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
+ break;
+
+ default:
+ DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (kidstr == NULL) {
+ DEBUG(0, ("ERROR: Out of memory!\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ if (!(ksidstr = talloc_strdup(ctx, sid_string_static(map->sid)))) {
+ DEBUG(0, ("Out of memory!\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
+
+ /*
+ * Get us the update lock. This is necessary to get the lock orders
+ * right, we need to deal with two records under a lock.
+ */
+
+ if (!(update_lock = idmap_tdb2_perm->fetch_locked(
+ idmap_tdb2_perm, ctx,
+ string_term_tdb_data("UPDATELOCK")))) {
+ DEBUG(10,("Failed to lock record %s\n", ksidstr));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ /*
+ * *DELETE* previous mappings if any. *
+ */
+
+ /* First delete indexed on SID */
+
+ if (((rec = idmap_tdb2_perm->fetch_locked(
+ idmap_tdb2_perm, update_lock,
+ string_term_tdb_data(ksidstr))) != NULL)
+ && (rec->value.dsize != 0)) {
+ struct db_record *rec2;
+
+ if ((rec2 = idmap_tdb2_perm->fetch_locked(
+ idmap_tdb2_perm, update_lock, rec->value))
+ != NULL) {
+ rec2->delete_rec(rec2);
+ TALLOC_FREE(rec2);
+ }
+
+ rec->delete_rec(rec);
+
+ tdb_delete(idmap_tdb2_tmp, rec->key);
+ tdb_delete(idmap_tdb2_tmp, rec->value);
+ }
+ TALLOC_FREE(rec);
+
+ /* Now delete indexed on unix ID */
+
+ if (((rec = idmap_tdb2_perm->fetch_locked(
+ idmap_tdb2_perm, update_lock,
+ string_term_tdb_data(kidstr))) != NULL)
+ && (rec->value.dsize != 0)) {
+ struct db_record *rec2;
+
+ if ((rec2 = idmap_tdb2_perm->fetch_locked(
+ idmap_tdb2_perm, update_lock, rec->value))
+ != NULL) {
+ rec2->delete_rec(rec2);
+ TALLOC_FREE(rec2);
+ }
+
+ rec->delete_rec(rec);
+
+ tdb_delete(idmap_tdb2_tmp, rec->key);
+ tdb_delete(idmap_tdb2_tmp, rec->value);
+ }
+ TALLOC_FREE(rec);
+
+ if (!NT_STATUS_IS_OK(tdb2_store_bystring(ksidstr, string_term_tdb_data(kidstr),
+ TDB_INSERT))) {
+ DEBUG(0, ("Error storing SID -> ID\n"));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+ if (!NT_STATUS_IS_OK(tdb2_store_bystring(kidstr, string_term_tdb_data(ksidstr),
+ TDB_INSERT))) {
+ DEBUG(0, ("Error storing ID -> SID\n"));
+ /* try to remove the previous stored SID -> ID map */
+ tdb2_delete_bystring(ksidstr);
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
+ ret = NT_STATUS_OK;
+
+done:
+ talloc_free(ksidstr);
+ talloc_free(kidstr);
+ SAFE_FREE(data.dptr);
+ TALLOC_FREE(update_lock);
+ return ret;
+}
+
+/*
+ remove a mapping.
+*/
+static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
+{
+ /* not supported as it would invalidate the cache tdb on other
+ nodes */
+ DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
+ return NT_STATUS_NOT_SUPPORTED;
+}
+
+/*
+ Close the idmap tdb instance
+*/
+static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
+{
+ /* don't do anything */
+ return NT_STATUS_OK;
+}
+
+
+/*
+ Dump all mappings out
+*/
+static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
+{
+ DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
+ return NT_STATUS_NOT_SUPPORTED;
+}
+
+static struct idmap_methods db_methods = {
+ .init = idmap_tdb2_db_init,
+ .unixids_to_sids = idmap_tdb2_unixids_to_sids,
+ .sids_to_unixids = idmap_tdb2_sids_to_unixids,
+ .set_mapping = idmap_tdb2_set_mapping,
+ .remove_mapping = idmap_tdb2_remove_mapping,
+ .dump_data = idmap_tdb2_dump_data,
+ .close_fn = idmap_tdb2_close
+};
+
+static struct idmap_alloc_methods db_alloc_methods = {
+ .init = idmap_tdb2_alloc_init,
+ .allocate_id = idmap_tdb2_allocate_id,
+ .get_id_hwm = idmap_tdb2_get_hwm,
+ .set_id_hwm = idmap_tdb2_set_hwm,
+ .close_fn = idmap_tdb2_alloc_close
+};
+
+NTSTATUS idmap_tdb2_init(void)
+{
+ NTSTATUS ret;
+
+ /* register both backends */
+ ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
+ NT_STATUS_NOT_OK_RETURN(ret);
+
+ return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
+}