diff options
Diffstat (limited to 'source3/winbindd/idmap_tdb2.c')
| -rw-r--r-- | source3/winbindd/idmap_tdb2.c | 1017 |
1 files changed, 1017 insertions, 0 deletions
diff --git a/source3/winbindd/idmap_tdb2.c b/source3/winbindd/idmap_tdb2.c new file mode 100644 index 0000000000..ab89e615f7 --- /dev/null +++ b/source3/winbindd/idmap_tdb2.c @@ -0,0 +1,1017 @@ +/* + 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_fstring(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 = sid_string_talloc(ctx, 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 = sid_string_talloc(ctx, 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); + if (! NT_STATUS_IS_OK(ret)) { + DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret))); + return ret; + } + + return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods); +} |