s3:smbd: add basic support for durable handle request and reconnect
authorMichael Adam <obnox@samba.org>
Fri, 8 Jun 2012 15:54:19 +0000 (17:54 +0200)
committerStefan Metzmacher <metze@samba.org>
Sat, 8 Sep 2012 01:39:06 +0000 (03:39 +0200)
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Pair-Programmed-With: Volker Lendecke <vl@samba.org>

source3/smbd/smb2_create.c

index 2c308b1ee65ffb4a76fc353074c8b8caf39a3d13..4ec03855dd222625933ae57e943d8c7c175cf35d 100644 (file)
@@ -432,6 +432,7 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
        struct smb2_create_blobs out_context_blobs;
        int requested_oplock_level;
        struct smb2_create_blob *dhnc = NULL;
+       struct smbXsrv_open *op = NULL;
 
        ZERO_STRUCT(out_context_blobs);
 
@@ -477,14 +478,24 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                        tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
                        return tevent_req_post(req, ev);
                }
-               /* we don't support durable handles yet */
-               tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
-               return tevent_req_post(req, ev);
+               if (in_context_blobs.num_blobs != 1) {
+                       /*
+                        * DHNC should be the only one.
+                        */
+                       tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
+                       return tevent_req_post(req, ev);
+               }
        }
 
        if (IS_IPC(smb1req->conn)) {
                const char *pipe_name = in_name;
 
+               if (dhnc) {
+                       /* durable handles are not supported on IPC$ */
+                       tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
+                       return tevent_req_post(req, ev);
+               }
+
                if (!lp_nt_pipe_support()) {
                        tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
                        return tevent_req_post(req, ev);
@@ -497,6 +508,12 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                }
                info = FILE_WAS_OPENED;
        } else if (CAN_PRINT(smb1req->conn)) {
+               if (dhnc) {
+                       /* durable handles are not supported on printers */
+                       tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
+                       return tevent_req_post(req, ev);
+               }
+
                status = file_new(smb1req, smb1req->conn, &result);
                if(!NT_STATUS_IS_OK(status)) {
                        tevent_req_nterror(req, status);
@@ -513,7 +530,6 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                info = FILE_WAS_CREATED;
        } else {
                char *fname;
-               struct smb_filename *smb_fname = NULL;
                struct smb2_create_blob *exta = NULL;
                struct ea_list *ea_list = NULL;
                struct smb2_create_blob *mxac = NULL;
@@ -525,6 +541,11 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                uint64_t allocation_size = 0;
                struct smb2_create_blob *twrp = NULL;
                struct smb2_create_blob *qfid = NULL;
+               struct GUID create_guid = GUID_zero();
+               bool update_open = false;
+               bool durable_requested = false;
+               uint32_t durable_timeout_msec = 0;
+               bool do_durable_reconnect = false;
 
                exta = smb2_create_blob_find(&in_context_blobs,
                                             SMB2_CREATE_TAG_EXTA);
@@ -592,9 +613,48 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                                return tevent_req_post(req, ev);
                        }
                        /*
-                        * we don't support durable handles yet
-                        * and have to ignore this
+                        * durable handle request is processed below.
+                        */
+                       durable_requested = true;
+                       /*
+                        * Set the timeout to 16 mins.
+                        *
+                        * TODO: test this against Windows 2012
+                        *       as the default for durable v2 is 1 min.
                         */
+                       durable_timeout_msec = (16*60*1000);
+               }
+
+               if (dhnc) {
+                       NTTIME now = timeval_to_nttime(&smb2req->request_time);
+                       uint64_t persistent_id;
+
+                       persistent_id = BVAL(dhnc->data.data, 0);
+
+                       status = smb2srv_open_recreate(smb2req->sconn->conn,
+                                               smb1req->conn->session_info,
+                                               persistent_id, create_guid,
+                                               now, &op);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               DEBUG(3, ("smbd_smb2_create_send: "
+                                         "smb2srv_open_recreate v1 failed: %s\n",
+                                         nt_errstr(status)));
+                               tevent_req_nterror(req, status);
+                               return tevent_req_post(req, ev);
+                       }
+
+                       DEBUG(10, ("smb2_create_send: DHNC: %s recreate the "
+                                  "smb2srv_open struct for a durable handle.\n",
+                                  op->global->durable ? "did" : "could not"));
+
+                       if (!op->global->durable) {
+                               talloc_free(op);
+                               tevent_req_nterror(req,
+                                       NT_STATUS_OBJECT_NAME_NOT_FOUND);
+                               return tevent_req_post(req, ev);
+                       }
+
+                       do_durable_reconnect = true;
                }
 
                if (alsi) {
@@ -645,58 +705,111 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
                in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 
-                /*
-                * For a DFS path the function parse_dfs_path()
-                * will do the path processing.
+               in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
+
+               DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
+
+               /*
+                * For the backend file open procedure, there are
+                * two possible modes: durable_reconnect or not.
                 */
+               if (do_durable_reconnect) {
+                       DATA_BLOB new_cookie = data_blob_null;
+
+                       status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
+                                               smb1req,
+                                               op,
+                                               op->global->backend_cookie,
+                                               op, &result, &new_cookie);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               NTSTATUS return_status;
+
+                               return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+
+                               DEBUG(3, ("smbd_smb2_create_send: "
+                                         "durable_reconnect failed: %s => %s\n",
+                                         nt_errstr(status),
+                                         nt_errstr(return_status)));
+
+                               tevent_req_nterror(req, return_status);
+                               return tevent_req_post(req, ev);
+                       }
+
+                       data_blob_free(&op->global->backend_cookie);
+                       op->global->backend_cookie = new_cookie;
+
+                       op->status = NT_STATUS_OK;
+                       op->global->disconnect_time = 0;
 
-               if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
-                       /* convert '\\' into '/' */
-                       status = check_path_syntax(fname);
+                       status = smbXsrv_open_update(op);
                        if (!NT_STATUS_IS_OK(status)) {
                                tevent_req_nterror(req, status);
                                return tevent_req_post(req, ev);
                        }
-               }
 
-               status = filename_convert(req,
-                                         smb1req->conn,
-                                         smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
-                                         fname,
-                                         0,    /* unix_convert flags */
-                                         NULL, /* ppath_contains_wcards */
-                                         &smb_fname);
-               if (!NT_STATUS_IS_OK(status)) {
-                       tevent_req_nterror(req, status);
-                       return tevent_req_post(req, ev);
-               }
+                       info = FILE_WAS_OPENED;
+               } else {
+                       struct smb_filename *smb_fname = NULL;
 
-               in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
+                       /*
+                        * For a DFS path the function parse_dfs_path()
+                        * will do the path processing.
+                        */
 
-               status = SMB_VFS_CREATE_FILE(smb1req->conn,
-                                            smb1req,
-                                            0, /* root_dir_fid */
-                                            smb_fname,
-                                            in_desired_access,
-                                            in_share_access,
-                                            in_create_disposition,
-                                            in_create_options,
-                                            in_file_attributes,
-                                            map_smb2_oplock_levels_to_samba(requested_oplock_level),
-                                            allocation_size,
-                                            0, /* private_flags */
-                                            sec_desc,
-                                            ea_list,
-                                            &result,
-                                            &info);
-               if (!NT_STATUS_IS_OK(status)) {
-                       if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
-                               return req;
+                       if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
+                               /* convert '\\' into '/' */
+                               status = check_path_syntax(fname);
+                               if (!NT_STATUS_IS_OK(status)) {
+                                       tevent_req_nterror(req, status);
+                                       return tevent_req_post(req, ev);
+                               }
                        }
-                       tevent_req_nterror(req, status);
-                       return tevent_req_post(req, ev);
+
+                       status = filename_convert(req,
+                                                 smb1req->conn,
+                                                 smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
+                                                 fname,
+                                                 0,    /* unix_convert flags */
+                                                 NULL, /* ppath_contains_wcards */
+                                                 &smb_fname);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               tevent_req_nterror(req, status);
+                               return tevent_req_post(req, ev);
+                       }
+
+                       status = SMB_VFS_CREATE_FILE(smb1req->conn,
+                                                    smb1req,
+                                                    0, /* root_dir_fid */
+                                                    smb_fname,
+                                                    in_desired_access,
+                                                    in_share_access,
+                                                    in_create_disposition,
+                                                    in_create_options,
+                                                    in_file_attributes,
+                                                    map_smb2_oplock_levels_to_samba(requested_oplock_level),
+                                                    allocation_size,
+                                                    0, /* private_flags */
+                                                    sec_desc,
+                                                    ea_list,
+                                                    &result,
+                                                    &info);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
+                                       return req;
+                               }
+                               tevent_req_nterror(req, status);
+                               return tevent_req_post(req, ev);
+                       }
+                       op = result->op;
                }
 
+               /*
+                * here we have op == result->op
+                */
+
+               DEBUG(10, ("smbd_smb2_create_send: "
+                          "response construction phase\n"));
+
                if (mxac) {
                        NTTIME last_write_time;
 
@@ -726,6 +839,50 @@ static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
                        }
                }
 
+               if (durable_requested &&
+                   BATCH_OPLOCK_TYPE(result->oplock_type))
+               {
+                       status = SMB_VFS_DURABLE_COOKIE(result,
+                                               op,
+                                               &op->global->backend_cookie);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               op->global->backend_cookie = data_blob_null;
+                       }
+               }
+               if (op->global->backend_cookie.length > 0) {
+                       update_open = true;
+
+                       op->global->durable = true;
+                       op->global->durable_timeout_msec = durable_timeout_msec;
+               }
+
+               if (update_open) {
+                       op->global->create_guid = create_guid;
+
+                       status = smbXsrv_open_update(op);
+                       DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
+                                  "returned %s\n",
+                                  nt_errstr(status)));
+                       if (!NT_STATUS_IS_OK(status)) {
+                               tevent_req_nterror(req, status);
+                               return tevent_req_post(req, ev);
+                       }
+               }
+
+               if (dhnq && op->global->durable) {
+                       uint8_t p[8] = { 0, };
+                       DATA_BLOB blob = data_blob_const(p, sizeof(p));
+
+                       status = smb2_create_blob_add(state,
+                                                     &out_context_blobs,
+                                                     SMB2_CREATE_TAG_DHNQ,
+                                                     blob);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               tevent_req_nterror(req, status);
+                               return tevent_req_post(req, ev);
+                       }
+               }
+
                if (qfid) {
                        uint8_t p[32];
                        uint64_t file_index = get_FileIndex(result->conn,