int connections_forall_read(int (*fn)(const struct connections_key *key, const struct connections_data *data, void *private_data), void *private_data) { struct db_context *ctx; struct conn_traverse_read_state state; NTSTATUS status; int count; ctx = connections_db_ctx(false); if (ctx == NULL) { return -1; } state.fn = fn; state.private_data = private_data; status = dbwrap_traverse_read(ctx, connections_forall_read_fn, (void *)&state, &count); if (!NT_STATUS_IS_OK(status)) { return -1; } return count; }
NTSTATUS smbXsrv_open_global_traverse( int (*fn)(struct smbXsrv_open_global0 *, void *), void *private_data) { NTSTATUS status; int count = 0; struct smbXsrv_open_global_traverse_state state = { .fn = fn, .private_data = private_data, }; become_root(); status = smbXsrv_open_global_init(); if (!NT_STATUS_IS_OK(status)) { unbecome_root(); DEBUG(0, ("Failed to initialize open_global: %s\n", nt_errstr(status))); return status; } status = dbwrap_traverse_read(smbXsrv_open_global_db_ctx, smbXsrv_open_global_traverse_fn, &state, &count); unbecome_root(); return status; }
static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map) { struct find_map_state state; state.found = false; state.name = name; state.map = map; dbwrap_traverse_read(db, find_map, (void *)&state, NULL); return state.found; }
static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map) { struct find_map_state state; state.found = false; state.name = NULL; /* Indicate we're looking for gid */ state.gid = gid; state.map = map; dbwrap_traverse_read(db, find_map, (void *)&state, NULL); return state.found; }
static int dbwrap_cache_traverse_read(struct db_context *db, int (*f)(struct db_record *rec, void *private_data), void *private_data) { struct db_cache_ctx *ctx = talloc_get_type_abort( db->private_data, struct db_cache_ctx); NTSTATUS status; int ret; status = dbwrap_traverse_read(ctx->backing, f, private_data, &ret); if (!NT_STATUS_IS_OK(status)) { return -1; } return ret; }
static int dbwrap_tool_listkeys(struct db_context *db, const char *keyname, const char *data) { NTSTATUS status; status = dbwrap_traverse_read(db, listkey_fn, NULL, NULL); if (!NT_STATUS_IS_OK(status)) { d_fprintf(stderr, "ERROR listing db keys\n"); return -1; } return 0; }
bool serverid_traverse_read(int (*fn)(const struct server_id *id, uint32_t msg_flags, void *private_data), void *private_data) { struct db_context *db; struct serverid_traverse_read_state state; NTSTATUS status; db = serverid_db(); if (db == NULL) { return false; } state.fn = fn; state.private_data = private_data; status = dbwrap_traverse_read(db, serverid_traverse_read_fn, &state, NULL); return NT_STATUS_IS_OK(status); }
static NTSTATUS printer_list_traverse(printer_list_trv_fn_t *fn, void *private_data, bool read_only) { struct db_context *db; NTSTATUS status; db = get_printer_list_db(); if (db == NULL) { return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (read_only) { status = dbwrap_traverse_read(db, fn, private_data, NULL); } else { status = dbwrap_traverse(db, fn, private_data, NULL); } return status; }
static NTSTATUS smb1srv_tcon_local_allocate_id(struct db_context *db, uint32_t lowest_id, uint32_t highest_id, TALLOC_CTX *mem_ctx, struct db_record **_rec, uint32_t *_id) { struct smb1srv_tcon_local_allocate_state state = { .lowest_id = lowest_id, .highest_id = highest_id, .last_id = 0, .useable_id = lowest_id, .status = NT_STATUS_INTERNAL_ERROR, }; uint32_t i; uint32_t range; NTSTATUS status; int count = 0; *_rec = NULL; *_id = 0; if (lowest_id > highest_id) { return NT_STATUS_INSUFFICIENT_RESOURCES; } /* * first we try randomly */ range = (highest_id - lowest_id) + 1; for (i = 0; i < (range / 2); i++) { uint32_t id; uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE]; TDB_DATA key; TDB_DATA val; struct db_record *rec = NULL; id = generate_random() % range; id += lowest_id; if (id < lowest_id) { id = lowest_id; } if (id > highest_id) { id = highest_id; } key = smbXsrv_tcon_local_id_to_key(id, key_buf); rec = dbwrap_fetch_locked(db, mem_ctx, key); if (rec == NULL) { return NT_STATUS_INSUFFICIENT_RESOURCES; } val = dbwrap_record_get_value(rec); if (val.dsize != 0) { TALLOC_FREE(rec); continue; } *_rec = rec; *_id = id; return NT_STATUS_OK; } /* * if the range is almost full, * we traverse the whole table * (this relies on sorted behavior of dbwrap_rbt) */ status = dbwrap_traverse_read(db, smb1srv_tcon_local_allocate_traverse, &state, &count); if (NT_STATUS_IS_OK(status)) { if (NT_STATUS_IS_OK(state.status)) { return NT_STATUS_INTERNAL_ERROR; } if (!NT_STATUS_EQUAL(state.status, NT_STATUS_INTERNAL_ERROR)) { return state.status; } if (state.useable_id <= state.highest_id) { state.status = NT_STATUS_OK; } else { return NT_STATUS_INSUFFICIENT_RESOURCES; } } else if (!NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_CORRUPTION)) { /* * Here we really expect NT_STATUS_INTERNAL_DB_CORRUPTION! * * If we get anything else it is an error, because it * means we did not manage to find a free slot in * the db. */ return NT_STATUS_INSUFFICIENT_RESOURCES; } if (NT_STATUS_IS_OK(state.status)) { uint32_t id; uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE]; TDB_DATA key; TDB_DATA val; struct db_record *rec = NULL; id = state.useable_id; key = smbXsrv_tcon_local_id_to_key(id, key_buf); rec = dbwrap_fetch_locked(db, mem_ctx, key); if (rec == NULL) { return NT_STATUS_INSUFFICIENT_RESOURCES; } val = dbwrap_record_get_value(rec); if (val.dsize != 0) { TALLOC_FREE(rec); return NT_STATUS_INTERNAL_DB_CORRUPTION; } *_rec = rec; *_id = id; return NT_STATUS_OK; } return state.status; } struct smbXsrv_tcon_local_fetch_state { struct smbXsrv_tcon *tcon; NTSTATUS status; }; static void smbXsrv_tcon_local_fetch_parser(TDB_DATA key, TDB_DATA data, void *private_data) { struct smbXsrv_tcon_local_fetch_state *state = (struct smbXsrv_tcon_local_fetch_state *)private_data; void *ptr; if (data.dsize != sizeof(ptr)) { state->status = NT_STATUS_INTERNAL_DB_ERROR; return; } memcpy(&ptr, data.dptr, data.dsize); state->tcon = talloc_get_type_abort(ptr, struct smbXsrv_tcon); state->status = NT_STATUS_OK; } static NTSTATUS smbXsrv_tcon_local_lookup(struct smbXsrv_tcon_table *table, uint32_t tcon_local_id, NTTIME now, struct smbXsrv_tcon **_tcon) { struct smbXsrv_tcon_local_fetch_state state = { .tcon = NULL, .status = NT_STATUS_INTERNAL_ERROR, }; uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE]; TDB_DATA key; NTSTATUS status; *_tcon = NULL; if (tcon_local_id == 0) { return NT_STATUS_NETWORK_NAME_DELETED; } if (table == NULL) { /* this might happen before the end of negprot */ return NT_STATUS_NETWORK_NAME_DELETED; } if (table->local.db_ctx == NULL) { return NT_STATUS_INTERNAL_ERROR; } key = smbXsrv_tcon_local_id_to_key(tcon_local_id, key_buf); status = dbwrap_parse_record(table->local.db_ctx, key, smbXsrv_tcon_local_fetch_parser, &state); if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) { return NT_STATUS_NETWORK_NAME_DELETED; } else if (!NT_STATUS_IS_OK(status)) { return status; } if (!NT_STATUS_IS_OK(state.status)) { return state.status; } if (NT_STATUS_EQUAL(state.tcon->status, NT_STATUS_NETWORK_NAME_DELETED)) { return NT_STATUS_NETWORK_NAME_DELETED; } state.tcon->idle_time = now; *_tcon = state.tcon; return state.tcon->status; } static int smbXsrv_tcon_global_destructor(struct smbXsrv_tcon_global0 *global) { return 0; } static void smbXsrv_tcon_global_verify_record(struct db_record *db_rec, bool *is_free, bool *was_free, TALLOC_CTX *mem_ctx, struct smbXsrv_tcon_global0 **_g); static NTSTATUS smbXsrv_tcon_global_allocate(struct db_context *db, TALLOC_CTX *mem_ctx, struct smbXsrv_tcon_global0 **_global) { uint32_t i; struct smbXsrv_tcon_global0 *global = NULL; uint32_t last_free = 0; const uint32_t min_tries = 3; *_global = NULL; global = talloc_zero(mem_ctx, struct smbXsrv_tcon_global0); if (global == NULL) { return NT_STATUS_NO_MEMORY; } talloc_set_destructor(global, smbXsrv_tcon_global_destructor); /* * Here we just randomly try the whole 32-bit space * * We use just 32-bit, because we want to reuse the * ID for SRVSVC. */ for (i = 0; i < UINT32_MAX; i++) { bool is_free = false; bool was_free = false; uint32_t id; uint8_t key_buf[SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE]; TDB_DATA key; if (i >= min_tries && last_free != 0) { id = last_free; } else { id = generate_random(); } if (id == 0) { id++; } if (id == UINT32_MAX) { id--; } key = smbXsrv_tcon_global_id_to_key(id, key_buf); global->db_rec = dbwrap_fetch_locked(db, mem_ctx, key); if (global->db_rec == NULL) { talloc_free(global); return NT_STATUS_INSUFFICIENT_RESOURCES; } smbXsrv_tcon_global_verify_record(global->db_rec, &is_free, &was_free, NULL, NULL); if (!is_free) { TALLOC_FREE(global->db_rec); continue; } if (!was_free && i < min_tries) { /* * The session_id is free now, * but was not free before. * * This happens if a smbd crashed * and did not cleanup the record. * * If this is one of our first tries, * then we try to find a real free one. */ if (last_free == 0) { last_free = id; } TALLOC_FREE(global->db_rec); continue; } global->tcon_global_id = id; *_global = global; return NT_STATUS_OK; } /* should not be reached */ talloc_free(global); return NT_STATUS_INTERNAL_ERROR; }
/* * Fallback check operation: just traverse. */ static int dbwrap_fallback_check(struct db_context *db) { NTSTATUS status = dbwrap_traverse_read(db, do_nothing, NULL, NULL); return NT_STATUS_IS_OK(status) ? 0 : -1; }