diff options
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/globals.h | 20 | ||||
| -rw-r--r-- | source3/smbd/server.c | 4 | ||||
| -rw-r--r-- | source3/smbd/smbXsrv_open.c | 1075 |
3 files changed, 1099 insertions, 0 deletions
diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h index b93b373ca5..d6c618f405 100644 --- a/source3/smbd/globals.h +++ b/source3/smbd/globals.h @@ -356,6 +356,7 @@ struct smbXsrv_connection { struct smbXsrv_session_table *session_table; struct smbXsrv_tcon_table *tcon_table; + struct smbXsrv_open_table *open_table; }; NTSTATUS smbXsrv_version_global_init(const struct server_id *server_id); @@ -407,6 +408,25 @@ NTSTATUS smb2srv_tcon_lookup(struct smbXsrv_session *session, struct smbXsrv_tcon **tcon); NTSTATUS smb2srv_tcon_disconnect_all(struct smbXsrv_session *session); +NTSTATUS smbXsrv_open_global_init(void); +NTSTATUS smbXsrv_open_create(struct smbXsrv_connection *conn, + struct auth_session_info *session_info, + NTTIME now, + struct smbXsrv_open **_open); +uint32_t smbXsrv_open_hash(struct smbXsrv_open *_open); +NTSTATUS smbXsrv_open_update(struct smbXsrv_open *_open); +NTSTATUS smbXsrv_open_close(struct smbXsrv_open *op, NTTIME now); +NTSTATUS smb1srv_open_table_init(struct smbXsrv_connection *conn); +NTSTATUS smb1srv_open_lookup(struct smbXsrv_connection *conn, + uint16_t fnum, NTTIME now, + struct smbXsrv_open **_open); +NTSTATUS smb2srv_open_table_init(struct smbXsrv_connection *conn); +NTSTATUS smb2srv_open_lookup(struct smbXsrv_connection *conn, + uint64_t persistent_id, + uint64_t volatile_id, + NTTIME now, + struct smbXsrv_open **_open); + struct smbd_smb2_request { struct smbd_smb2_request *prev, *next; diff --git a/source3/smbd/server.c b/source3/smbd/server.c index b4b5ae3d91..94a25109fb 100644 --- a/source3/smbd/server.c +++ b/source3/smbd/server.c @@ -1443,6 +1443,10 @@ extern void build_options(bool screen); DEBUG(0, ("ERROR: file_init_global() failed\n")); return -1; } + status = smbXsrv_open_global_init(); + if (!NT_STATUS_IS_OK(status)) { + exit(1); + } /* This MUST be done before start_epmd() because otherwise * start_epmd() forks and races against dcesrv_ep_setup() to diff --git a/source3/smbd/smbXsrv_open.c b/source3/smbd/smbXsrv_open.c new file mode 100644 index 0000000000..abb2144971 --- /dev/null +++ b/source3/smbd/smbXsrv_open.c @@ -0,0 +1,1075 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Stefan Metzmacher 2012 + Copyright (C) Michael Adam 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 "system/filesys.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "dbwrap/dbwrap.h" +#include "dbwrap/dbwrap_rbt.h" +#include "dbwrap/dbwrap_open.h" +#include "../libcli/security/security.h" +#include "messages.h" +#include "lib/util/util_tdb.h" +#include "librpc/gen_ndr/ndr_smbXsrv.h" +#include <ccan/hash/hash.h> +#include "serverid.h" + +struct smbXsrv_open_table { + struct { + struct db_context *db_ctx; + uint32_t lowest_id; + uint32_t highest_id; + uint32_t max_opens; + uint32_t num_opens; + } local; + struct { + struct db_context *db_ctx; + } global; +}; + +static struct db_context *smbXsrv_open_global_db_ctx = NULL; + +NTSTATUS smbXsrv_open_global_init(void) +{ + const char *global_path = NULL; + struct db_context *db_ctx = NULL; + + if (smbXsrv_open_global_db_ctx != NULL) { + return NT_STATUS_OK; + } + + global_path = lock_path("smbXsrv_open_global.tdb"); + + db_ctx = db_open(NULL, global_path, + 0, /* hash_size */ + TDB_DEFAULT | + TDB_CLEAR_IF_FIRST | + TDB_INCOMPATIBLE_HASH, + O_RDWR | O_CREAT, 0600, + DBWRAP_LOCK_ORDER_1); + if (db_ctx == NULL) { + NTSTATUS status; + + status = map_nt_error_from_unix_common(errno); + + return status; + } + + smbXsrv_open_global_db_ctx = db_ctx; + + return NT_STATUS_OK; +} + +/* + * NOTE: + * We need to store the keys in big endian so that dbwrap_rbt's memcmp + * has the same result as integer comparison between the uint32_t + * values. + * + * TODO: implement string based key + */ + +#define SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE sizeof(uint32_t) + +static TDB_DATA smbXsrv_open_global_id_to_key(uint32_t id, + uint8_t *key_buf) +{ + TDB_DATA key; + + RSIVAL(key_buf, 0, id); + + key = make_tdb_data(key_buf, SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE); + + return key; +} + +#if 0 +static NTSTATUS smbXsrv_open_global_key_to_id(TDB_DATA key, uint32_t *id) +{ + if (id == NULL) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (key.dsize != SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE) { + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + *id = RIVAL(key.dptr, 0); + + return NT_STATUS_OK; +} +#endif + +#define SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE sizeof(uint32_t) + +static TDB_DATA smbXsrv_open_local_id_to_key(uint32_t id, + uint8_t *key_buf) +{ + TDB_DATA key; + + RSIVAL(key_buf, 0, id); + + key = make_tdb_data(key_buf, SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE); + + return key; +} + +static NTSTATUS smbXsrv_open_local_key_to_id(TDB_DATA key, uint32_t *id) +{ + if (id == NULL) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (key.dsize != SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE) { + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + *id = RIVAL(key.dptr, 0); + + return NT_STATUS_OK; +} + +static NTSTATUS smbXsrv_open_table_init(struct smbXsrv_connection *conn, + uint32_t lowest_id, + uint32_t highest_id, + uint32_t max_opens) +{ + struct smbXsrv_open_table *table; + NTSTATUS status; + uint64_t max_range; + + if (lowest_id > highest_id) { + return NT_STATUS_INTERNAL_ERROR; + } + + max_range = highest_id; + max_range -= lowest_id; + max_range += 1; + + if (max_opens > max_range) { + return NT_STATUS_INTERNAL_ERROR; + } + + table = talloc_zero(conn, struct smbXsrv_open_table); + if (table == NULL) { + return NT_STATUS_NO_MEMORY; + } + + table->local.db_ctx = db_open_rbt(table); + if (table->local.db_ctx == NULL) { + TALLOC_FREE(table); + return NT_STATUS_NO_MEMORY; + } + table->local.lowest_id = lowest_id; + table->local.highest_id = highest_id; + table->local.max_opens = max_opens; + + status = smbXsrv_open_global_init(); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(table); + return status; + } + + table->global.db_ctx = smbXsrv_open_global_db_ctx; + + conn->open_table = table; + return NT_STATUS_OK; +} + +struct smbXsrv_open_local_allocate_state { + const uint32_t lowest_id; + const uint32_t highest_id; + uint32_t last_id; + uint32_t useable_id; + NTSTATUS status; +}; + +static int smbXsrv_open_local_allocate_traverse(struct db_record *rec, + void *private_data) +{ + struct smbXsrv_open_local_allocate_state *state = + (struct smbXsrv_open_local_allocate_state *)private_data; + TDB_DATA key = dbwrap_record_get_key(rec); + uint32_t id = 0; + NTSTATUS status; + + status = smbXsrv_open_local_key_to_id(key, &id); + if (!NT_STATUS_IS_OK(status)) { + state->status = status; + return -1; + } + + if (id <= state->last_id) { + state->status = NT_STATUS_INTERNAL_DB_CORRUPTION; + return -1; + } + state->last_id = id; + + if (id > state->useable_id) { + state->status = NT_STATUS_OK; + return -1; + } + + if (state->useable_id == state->highest_id) { + state->status = NT_STATUS_INSUFFICIENT_RESOURCES; + return -1; + } + + state->useable_id +=1; + return 0; +} + +static NTSTATUS smbXsrv_open_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 smbXsrv_open_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_OPEN_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_open_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, smbXsrv_open_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_OPEN_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + TDB_DATA val; + struct db_record *rec = NULL; + + id = state.useable_id; + + key = smbXsrv_open_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_open_local_fetch_state { + struct smbXsrv_open *op; + NTSTATUS status; +}; + +static void smbXsrv_open_local_fetch_parser(TDB_DATA key, TDB_DATA data, + void *private_data) +{ + struct smbXsrv_open_local_fetch_state *state = + (struct smbXsrv_open_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->op = talloc_get_type_abort(ptr, struct smbXsrv_open); + state->status = NT_STATUS_OK; +} + +static NTSTATUS smbXsrv_open_local_lookup(struct smbXsrv_open_table *table, + uint32_t open_local_id, + uint32_t open_global_id, + NTTIME now, + struct smbXsrv_open **_open) +{ + struct smbXsrv_open_local_fetch_state state = { + .op = NULL, + .status = NT_STATUS_INTERNAL_ERROR, + }; + uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + NTSTATUS status; + + *_open = NULL; + + if (open_local_id == 0) { + return NT_STATUS_FILE_CLOSED; + } + + if (table == NULL) { + /* this might happen before the end of negprot */ + return NT_STATUS_FILE_CLOSED; + } + + if (table->local.db_ctx == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_open_local_id_to_key(open_local_id, key_buf); + + status = dbwrap_parse_record(table->local.db_ctx, key, + smbXsrv_open_local_fetch_parser, + &state); + if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) { + return NT_STATUS_FILE_CLOSED; + } else if (!NT_STATUS_IS_OK(status)) { + return status; + } + if (!NT_STATUS_IS_OK(state.status)) { + return state.status; + } + + if (NT_STATUS_EQUAL(state.op->status, NT_STATUS_FILE_CLOSED)) { + return NT_STATUS_FILE_CLOSED; + } + + if (open_global_id == 0) { + /* make the global check a no-op for SMB1 */ + open_global_id = state.op->global->open_global_id; + } + + if (state.op->global->open_global_id != open_global_id) { + return NT_STATUS_FILE_CLOSED; + } + + state.op->idle_time = now; + + *_open = state.op; + return state.op->status; +} + +static int smbXsrv_open_global_destructor(struct smbXsrv_open_global0 *global) +{ + return 0; +} + +static void smbXsrv_open_global_verify_record(struct db_record *db_rec, + bool *is_free, + bool *was_free, + TALLOC_CTX *mem_ctx, + struct smbXsrv_open_global0 **_g); + +static NTSTATUS smbXsrv_open_global_allocate(struct db_context *db, + TALLOC_CTX *mem_ctx, + struct smbXsrv_open_global0 **_global) +{ + uint32_t i; + struct smbXsrv_open_global0 *global = NULL; + uint32_t last_free = 0; + const uint32_t min_tries = 3; + + *_global = NULL; + + global = talloc_zero(mem_ctx, struct smbXsrv_open_global0); + if (global == NULL) { + return NT_STATUS_NO_MEMORY; + } + talloc_set_destructor(global, smbXsrv_open_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_OPEN_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_open_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_open_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->open_global_id = id; + + *_global = global; + return NT_STATUS_OK; + } + + /* should not be reached */ + talloc_free(global); + return NT_STATUS_INTERNAL_ERROR; +} + +static void smbXsrv_open_global_verify_record(struct db_record *db_rec, + bool *is_free, + bool *was_free, + TALLOC_CTX *mem_ctx, + struct smbXsrv_open_global0 **_g) +{ + TDB_DATA key; + TDB_DATA val; + DATA_BLOB blob; + struct smbXsrv_open_globalB global_blob; + enum ndr_err_code ndr_err; + struct smbXsrv_open_global0 *global = NULL; + bool exists; + TALLOC_CTX *frame = talloc_stackframe(); + + *is_free = false; + + if (was_free) { + *was_free = false; + } + if (_g) { + *_g = NULL; + } + + key = dbwrap_record_get_key(db_rec); + + val = dbwrap_record_get_value(db_rec); + if (val.dsize == 0) { + TALLOC_FREE(frame); + *is_free = true; + if (was_free) { + *was_free = true; + } + return; + } + + blob = data_blob_const(val.dptr, val.dsize); + + ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob, + (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_open_globalB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + NTSTATUS status = ndr_map_error2ntstatus(ndr_err); + DEBUG(1,("smbXsrv_open_global_verify_record: " + "key '%s' ndr_pull_struct_blob - %s\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + nt_errstr(status))); + TALLOC_FREE(frame); + return; + } + + DEBUG(10,("smbXsrv_open_global_verify_record\n")); + if (DEBUGLVL(10)) { + NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob); + } + + if (global_blob.version != SMBXSRV_VERSION_0) { + DEBUG(0,("smbXsrv_open_global_verify_record: " + "key '%s' use unsupported version %u\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + global_blob.version)); + NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob); + TALLOC_FREE(frame); + return; + } + + global = global_blob.info.info0; + + exists = serverid_exists(&global->server_id); + if (!exists) { + DEBUG(2,("smbXsrv_open_global_verify_record: " + "key '%s' server_id %s does not exist.\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + server_id_str(frame, &global->server_id))); + if (DEBUGLVL(2)) { + NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob); + } + TALLOC_FREE(frame); + dbwrap_record_delete(db_rec); + *is_free = true; + return; + } + + if (_g) { + *_g = talloc_move(mem_ctx, &global); + } + TALLOC_FREE(frame); +} + +static NTSTATUS smbXsrv_open_global_store(struct smbXsrv_open_global0 *global) +{ + struct smbXsrv_open_globalB global_blob; + DATA_BLOB blob = data_blob_null; + TDB_DATA key; + TDB_DATA val; + NTSTATUS status; + enum ndr_err_code ndr_err; + + /* + * TODO: if we use other versions than '0' + * we would add glue code here, that would be able to + * store the information in the old format. + */ + + if (global->db_rec == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = dbwrap_record_get_key(global->db_rec); + val = dbwrap_record_get_value(global->db_rec); + + ZERO_STRUCT(global_blob); + global_blob.version = smbXsrv_version_global_current(); + if (val.dsize >= 8) { + global_blob.seqnum = IVAL(val.dptr, 4); + } + global_blob.seqnum += 1; + global_blob.info.info0 = global; + + ndr_err = ndr_push_struct_blob(&blob, global->db_rec, &global_blob, + (ndr_push_flags_fn_t)ndr_push_smbXsrv_open_globalB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + status = ndr_map_error2ntstatus(ndr_err); + DEBUG(1,("smbXsrv_open_global_store: key '%s' ndr_push - %s\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize), + nt_errstr(status))); + TALLOC_FREE(global->db_rec); + return status; + } + + val = make_tdb_data(blob.data, blob.length); + status = dbwrap_record_store(global->db_rec, val, TDB_REPLACE); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1,("smbXsrv_open_global_store: key '%s' store - %s\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize), + nt_errstr(status))); + TALLOC_FREE(global->db_rec); + return status; + } + + if (DEBUGLVL(10)) { + DEBUG(10,("smbXsrv_open_global_store: key '%s' stored\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize))); + NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob); + } + + TALLOC_FREE(global->db_rec); + + return NT_STATUS_OK; +} + +static int smbXsrv_open_destructor(struct smbXsrv_open *op) +{ + NTSTATUS status; + + status = smbXsrv_open_close(op, 0); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("smbXsrv_open_destructor: " + "smbXsrv_open_close() failed - %s\n", + nt_errstr(status))); + } + + TALLOC_FREE(op->global); + + return 0; +} + +NTSTATUS smbXsrv_open_create(struct smbXsrv_connection *conn, + struct auth_session_info *session_info, + NTTIME now, + struct smbXsrv_open **_open) +{ + struct smbXsrv_open_table *table = conn->open_table; + struct db_record *local_rec = NULL; + struct smbXsrv_open *op = NULL; + void *ptr = NULL; + TDB_DATA val; + struct smbXsrv_open_global0 *global = NULL; + NTSTATUS status; + struct dom_sid *current_sid = NULL; + struct security_token *current_token = NULL; + + if (session_info == NULL) { + return NT_STATUS_INVALID_HANDLE; + } + current_token = session_info->security_token; + + if (current_token == NULL) { + return NT_STATUS_INVALID_HANDLE; + } + + if (current_token->num_sids > PRIMARY_USER_SID_INDEX) { + current_sid = ¤t_token->sids[PRIMARY_USER_SID_INDEX]; + } + + if (current_sid == NULL) { + return NT_STATUS_INVALID_HANDLE; + } + + if (table->local.num_opens >= table->local.max_opens) { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + op = talloc_zero(table, struct smbXsrv_open); + if (op == NULL) { + return NT_STATUS_NO_MEMORY; + } + op->table = table; + op->status = NT_STATUS_OK; /* TODO: start with INTERNAL_ERROR */ + op->idle_time = now; + + status = smbXsrv_open_global_allocate(table->global.db_ctx, + op, &global); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(op); + return status; + } + op->global = global; + + status = smbXsrv_open_local_allocate_id(table->local.db_ctx, + table->local.lowest_id, + table->local.highest_id, + op, + &local_rec, + &op->local_id); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(op); + return status; + } + + global->open_persistent_id = global->open_global_id; + global->open_volatile_id = op->local_id; + + global->server_id = messaging_server_id(conn->msg_ctx); + global->open_time = now; + global->open_owner = *current_sid; + + ptr = op; + val = make_tdb_data((uint8_t const *)&ptr, sizeof(ptr)); + status = dbwrap_record_store(local_rec, val, TDB_REPLACE); + TALLOC_FREE(local_rec); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(op); + return status; + } + table->local.num_opens += 1; + + talloc_set_destructor(op, smbXsrv_open_destructor); + + status = smbXsrv_open_global_store(global); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("smbXsrv_open_create: " + "global_id (0x%08x) store failed - %s\n", + op->global->open_global_id, + nt_errstr(status))); + TALLOC_FREE(op); + return status; + } + + if (DEBUGLVL(10)) { + struct smbXsrv_openB open_blob; + + ZERO_STRUCT(open_blob); + open_blob.version = SMBXSRV_VERSION_0; + open_blob.info.info0 = op; + + DEBUG(10,("smbXsrv_open_create: global_id (0x%08x) stored\n", + op->global->open_global_id)); + NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob); + } + + *_open = op; + return NT_STATUS_OK; +} + +uint32_t smbXsrv_open_hash(struct smbXsrv_open *_open) +{ + uint8_t buf[8+8+8]; + uint32_t ret; + + SBVAL(buf, 0, _open->global->open_persistent_id); + SBVAL(buf, 8, _open->global->open_volatile_id); + SBVAL(buf, 16, _open->global->open_time); + + ret = hash(buf, sizeof(buf), 0); + + if (ret == 0) { + ret = 1; + } + + return ret; +} + +NTSTATUS smbXsrv_open_update(struct smbXsrv_open *op) +{ + struct smbXsrv_open_table *table = op->table; + NTSTATUS status; + uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE]; + TDB_DATA key; + + if (op->global->db_rec != NULL) { + DEBUG(0, ("smbXsrv_open_update(0x%08x): " + "Called with db_rec != NULL'\n", + op->global->open_global_id)); + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_open_global_id_to_key(op->global->open_global_id, + key_buf); + + op->global->db_rec = dbwrap_fetch_locked(table->global.db_ctx, + op->global, key); + if (op->global->db_rec == NULL) { + DEBUG(0, ("smbXsrv_open_update(0x%08x): " + "Failed to lock global key '%s'\n", + op->global->open_global_id, + hex_encode_talloc(talloc_tos(), key.dptr, + key.dsize))); + return NT_STATUS_INTERNAL_DB_ERROR; + } + + status = smbXsrv_open_global_store(op->global); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("smbXsrv_open_update: " + "global_id (0x%08x) store failed - %s\n", + op->global->open_global_id, + nt_errstr(status))); + return status; + } + + if (DEBUGLVL(10)) { + struct smbXsrv_openB open_blob; + + ZERO_STRUCT(open_blob); + open_blob.version = SMBXSRV_VERSION_0; + open_blob.info.info0 = op; + + DEBUG(10,("smbXsrv_open_update: global_id (0x%08x) stored\n", + op->global->open_global_id)); + NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob); + } + + return NT_STATUS_OK; +} + +NTSTATUS smbXsrv_open_close(struct smbXsrv_open *op, NTTIME now) +{ + struct smbXsrv_open_table *table; + struct db_record *local_rec = NULL; + struct db_record *global_rec = NULL; + NTSTATUS status; + NTSTATUS error = NT_STATUS_OK; + + if (op->table == NULL) { + return NT_STATUS_OK; + } + + table = op->table; + op->table = NULL; + + op->status = NT_STATUS_FILE_CLOSED; + + global_rec = op->global->db_rec; + op->global->db_rec = NULL; + if (global_rec == NULL) { + uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE]; + TDB_DATA key; + + key = smbXsrv_open_global_id_to_key( + op->global->open_global_id, + key_buf); + + global_rec = dbwrap_fetch_locked(table->global.db_ctx, + op->global, key); + if (global_rec == NULL) { + DEBUG(0, ("smbXsrv_open_close(0x%08x): " + "Failed to lock global key '%s'\n", + op->global->open_global_id, + hex_encode_talloc(global_rec, key.dptr, + key.dsize))); + error = NT_STATUS_INTERNAL_ERROR; + } + } + + if (global_rec != NULL) { + status = dbwrap_record_delete(global_rec); + if (!NT_STATUS_IS_OK(status)) { + TDB_DATA key = dbwrap_record_get_key(global_rec); + + DEBUG(0, ("smbXsrv_open_close(0x%08x): " + "failed to delete global key '%s': %s\n", + op->global->open_global_id, + hex_encode_talloc(global_rec, key.dptr, + key.dsize), + nt_errstr(status))); + error = status; + } + } + TALLOC_FREE(global_rec); + + local_rec = op->db_rec; + if (local_rec == NULL) { + uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + + key = smbXsrv_open_local_id_to_key(op->local_id, key_buf); + + local_rec = dbwrap_fetch_locked(table->local.db_ctx, + op, key); + if (local_rec == NULL) { + DEBUG(0, ("smbXsrv_open_close(0x%08x): " + "Failed to lock local key '%s'\n", + op->global->open_global_id, + hex_encode_talloc(local_rec, key.dptr, + key.dsize))); + error = NT_STATUS_INTERNAL_ERROR; + } + } + + if (local_rec != NULL) { + status = dbwrap_record_delete(local_rec); + if (!NT_STATUS_IS_OK(status)) { + TDB_DATA key = dbwrap_record_get_key(local_rec); + + DEBUG(0, ("smbXsrv_open_close(0x%08x): " + "failed to delete local key '%s': %s\n", + op->global->open_global_id, + hex_encode_talloc(local_rec, key.dptr, + key.dsize), + nt_errstr(status))); + error = status; + } + table->local.num_opens -= 1; + } + if (op->db_rec == NULL) { + TALLOC_FREE(local_rec); + } + op->db_rec = NULL; + + if (op->compat) { + file_free(NULL, op->compat); + op->compat = NULL; + } + + return error; +} + +NTSTATUS smb1srv_open_table_init(struct smbXsrv_connection *conn) +{ + uint32_t max_opens; + + /* + * Allow a range from 1..65534. + * + * With real_max_open_files possible ids, + * truncated to the SMB1 limit of 16-bit. + * + * 0 and 0xFFFF are no valid ids. + */ + max_opens = conn->sconn->real_max_open_files; + max_opens = MIN(max_opens, UINT16_MAX - 1); + + return smbXsrv_open_table_init(conn, 1, UINT16_MAX - 1, max_opens); +} + +NTSTATUS smb1srv_open_lookup(struct smbXsrv_connection *conn, + uint16_t fnum, NTTIME now, + struct smbXsrv_open **_open) +{ + struct smbXsrv_open_table *table = conn->open_table; + uint32_t local_id = fnum; + uint32_t global_id = 0; + + return smbXsrv_open_local_lookup(table, local_id, global_id, now, _open); +} + +NTSTATUS smb2srv_open_table_init(struct smbXsrv_connection *conn) +{ + uint32_t max_opens; + + /* + * Allow a range from 1..4294967294. + * + * With real_max_open_files possible ids, + * truncated to 16-bit (the same as SMB1 for now). + * + * 0 and 0xFFFFFFFF are no valid ids. + * + * The usage of conn->sconn->real_max_open_files + * is the reason that we use one open table per + * transport connection (as we still have a 1:1 mapping + * between process and transport connection). + */ + max_opens = conn->sconn->real_max_open_files; + max_opens = MIN(max_opens, UINT16_MAX - 1); + + return smbXsrv_open_table_init(conn, 1, UINT32_MAX - 1, max_opens); +} + +NTSTATUS smb2srv_open_lookup(struct smbXsrv_connection *conn, + uint64_t persistent_id, + uint64_t volatile_id, + NTTIME now, + struct smbXsrv_open **_open) +{ + struct smbXsrv_open_table *table = conn->open_table; + uint32_t local_id = volatile_id & UINT32_MAX; + uint64_t local_zeros = volatile_id & 0xFFFFFFFF00000000LLU; + uint32_t global_id = persistent_id & UINT32_MAX; + uint64_t global_zeros = persistent_id & 0xFFFFFFFF00000000LLU; + + if (local_zeros != 0) { + return NT_STATUS_FILE_CLOSED; + } + + if (global_zeros != 0) { + return NT_STATUS_FILE_CLOSED; + } + + if (global_id == 0) { + return NT_STATUS_FILE_CLOSED; + } + + return smbXsrv_open_local_lookup(table, local_id, global_id, now, _open); +} |