+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- Infrastructure for async requests
- Copyright (C) Volker Lendecke 2008
-
- 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 "lib/tevent/tevent.h"
-#include "lib/talloc/talloc.h"
-#include "lib/util/dlinklist.h"
-#include "lib/async_req/async_req.h"
-
-#ifndef TALLOC_FREE
-#define TALLOC_FREE(ctx) do { talloc_free(ctx); ctx=NULL; } while(0)
-#endif
-
-/**
- * @brief Print an async_req structure
- * @param[in] mem_ctx The memory context for the result
- * @param[in] req The request to be printed
- * @retval Text representation of req
- *
- * This is a default print function for async requests. Implementations should
- * override this with more specific information.
- *
- * This function should not be used by async API users, this is non-static
- * only to allow implementations to easily provide default information in
- * their specific functions.
- */
-
-char *async_req_print(TALLOC_CTX *mem_ctx, struct async_req *req)
-{
- return talloc_asprintf(mem_ctx, "async_req: state=%d, error=%d, "
- "priv=%s", req->state, (int)req->error,
- talloc_get_name(req->private_data));
-}
-
-/**
- * @brief Create an async request
- * @param[in] mem_ctx The memory context for the result
- * @param[in] ev The event context this async request will be driven by
- * @retval A new async request
- *
- * The new async request will be initialized in state ASYNC_REQ_IN_PROGRESS
- */
-
-struct async_req *async_req_new(TALLOC_CTX *mem_ctx)
-{
- struct async_req *result;
-
- result = talloc_zero(mem_ctx, struct async_req);
- if (result == NULL) {
- return NULL;
- }
- result->state = ASYNC_REQ_IN_PROGRESS;
- result->print = async_req_print;
- return result;
-}
-
-static void async_req_finish(struct async_req *req, enum async_req_state state)
-{
- req->state = state;
- if (req->async.fn != NULL) {
- req->async.fn(req);
- }
-}
-
-/**
- * @brief An async request has successfully finished
- * @param[in] req The finished request
- *
- * async_req_done is to be used by implementors of async requests. When a
- * request is successfully finished, this function calls the user's completion
- * function.
- */
-
-void async_req_done(struct async_req *req)
-{
- async_req_finish(req, ASYNC_REQ_DONE);
-}
-
-/**
- * @brief An async request has seen an error
- * @param[in] req The request with an error
- * @param[in] error The error code
- *
- * async_req_done is to be used by implementors of async requests. When a
- * request can not successfully completed, the implementation should call this
- * function with the appropriate status code.
- */
-
-void async_req_error(struct async_req *req, uint64_t error)
-{
- req->error = error;
- async_req_finish(req, ASYNC_REQ_USER_ERROR);
-}
-
-/**
- * @brief Timed event callback
- * @param[in] ev Event context
- * @param[in] te The timed event
- * @param[in] now zero time
- * @param[in] priv The async request to be finished
- */
-
-static void async_trigger(struct tevent_context *ev, struct tevent_timer *te,
- struct timeval now, void *priv)
-{
- struct async_req *req = talloc_get_type_abort(priv, struct async_req);
-
- TALLOC_FREE(te);
- if (req->error == 0) {
- async_req_done(req);
- }
- else {
- async_req_error(req, req->error);
- }
-}
-
-/**
- * @brief Helper function for nomem check
- * @param[in] p The pointer to be checked
- * @param[in] req The request being processed
- *
- * Convenience helper to easily check alloc failure within a callback
- * implementing the next step of an async request.
- *
- * Call pattern would be
- * \code
- * p = talloc(mem_ctx, bla);
- * if (async_req_ntnomem(p, req)) {
- * return;
- * }
- * \endcode
- */
-
-bool async_req_nomem(const void *p, struct async_req *req)
-{
- if (p != NULL) {
- return false;
- }
- async_req_finish(req, ASYNC_REQ_NO_MEMORY);
- return true;
-}
-
-/**
- * @brief Finish a request before it started processing
- * @param[in] req The finished request
- * @param[in] status The success code
- *
- * An implementation of an async request might find that it can either finish
- * the request without waiting for an external event, or it can't even start
- * the engine. To present the illusion of a callback to the user of the API,
- * the implementation can call this helper function which triggers an
- * immediate timed event. This way the caller can use the same calling
- * conventions, independent of whether the request was actually deferred.
- */
-
-bool async_post_error(struct async_req *req, struct tevent_context *ev,
- uint64_t error)
-{
- req->error = error;
-
- if (tevent_add_timer(ev, req, tevent_timeval_zero(),
- async_trigger, req) == NULL) {
- return false;
- }
- return true;
-}
-
-bool async_req_is_error(struct async_req *req, enum async_req_state *state,
- uint64_t *error)
-{
- if (req->state == ASYNC_REQ_DONE) {
- return false;
- }
- if (req->state == ASYNC_REQ_USER_ERROR) {
- *error = req->error;
- }
- *state = req->state;
- return true;
-}
-
-struct async_queue_entry {
- struct async_queue_entry *prev, *next;
- struct async_req_queue *queue;
- struct async_req *req;
- void (*trigger)(struct async_req *req);
-};
-
-struct async_req_queue {
- struct async_queue_entry *queue;
-};
-
-struct async_req_queue *async_req_queue_init(TALLOC_CTX *mem_ctx)
-{
- return talloc_zero(mem_ctx, struct async_req_queue);
-}
-
-static int async_queue_entry_destructor(struct async_queue_entry *e)
-{
- struct async_req_queue *queue = e->queue;
-
- DLIST_REMOVE(queue->queue, e);
-
- if (queue->queue != NULL) {
- queue->queue->trigger(queue->queue->req);
- }
-
- return 0;
-}
-
-static void async_req_immediate_trigger(struct tevent_context *ev,
- struct tevent_timer *te,
- struct timeval now,
- void *priv)
-{
- struct async_queue_entry *e = talloc_get_type_abort(
- priv, struct async_queue_entry);
-
- TALLOC_FREE(te);
- e->trigger(e->req);
-}
-
-bool async_req_enqueue(struct async_req_queue *queue, struct tevent_context *ev,
- struct async_req *req,
- void (*trigger)(struct async_req *req))
-{
- struct async_queue_entry *e;
- bool busy;
-
- busy = (queue->queue != NULL);
-
- e = talloc(req, struct async_queue_entry);
- if (e == NULL) {
- return false;
- }
-
- e->req = req;
- e->trigger = trigger;
- e->queue = queue;
-
- DLIST_ADD_END(queue->queue, e, struct async_queue_entry *);
- talloc_set_destructor(e, async_queue_entry_destructor);
-
- if (!busy) {
- struct tevent_timer *te;
-
- te = tevent_add_timer(ev, e, tevent_timeval_zero(),
- async_req_immediate_trigger,
- e);
- if (te == NULL) {
- TALLOC_FREE(e);
- return false;
- }
- }
-
- return true;
-}
-
-bool _async_req_setup(TALLOC_CTX *mem_ctx, struct async_req **preq,
- void *pstate, size_t state_size, const char *typename)
-{
- struct async_req *req;
- void **ppstate = (void **)pstate;
- void *state;
-
- req = async_req_new(mem_ctx);
- if (req == NULL) {
- return false;
- }
- state = talloc_size(req, state_size);
- if (state == NULL) {
- TALLOC_FREE(req);
- return false;
- }
- talloc_set_name_const(state, typename);
- req->private_data = state;
-
- *preq = req;
- *ppstate = state;
-
- return true;
-}
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- Infrastructure for async requests
- Copyright (C) Volker Lendecke 2008
-
- 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/>.
-*/
-
-#ifndef __ASYNC_REQ_H__
-#define __ASYNC_REQ_H__
-
-#include "lib/talloc/talloc.h"
-
-/**
- * An async request moves between the following 4 states:
- */
-
-enum async_req_state {
- /**
- * we are creating the request
- */
- ASYNC_REQ_INIT,
- /**
- * we are waiting the request to complete
- */
- ASYNC_REQ_IN_PROGRESS,
- /**
- * the request is finished
- */
- ASYNC_REQ_DONE,
- /**
- * A user error has occured
- */
- ASYNC_REQ_USER_ERROR,
- /**
- * Request timed out
- */
- ASYNC_REQ_TIMED_OUT,
- /**
- * No memory in between
- */
- ASYNC_REQ_NO_MEMORY
-};
-
-/**
- * @brief An async request
- *
- * This represents an async request being processed by callbacks via an event
- * context. A user can issue for example a write request to a socket, giving
- * an implementation function the fd, the buffer and the number of bytes to
- * transfer. The function issuing the request will immediately return without
- * blocking most likely without having sent anything. The API user then fills
- * in req->async.fn and req->async.priv, functions that are called when the
- * request is finished.
- *
- * It is up to the user of the async request to talloc_free it after it has
- * finished. This can happen while the completion function is called.
- */
-
-struct async_req {
- /**
- * @brief The external state - will be queried by the caller
- *
- * While the async request is being processed, state will remain in
- * ASYNC_REQ_IN_PROGRESS. A request is finished if
- * req->state>=ASYNC_REQ_DONE.
- */
- enum async_req_state state;
-
- /**
- * @brief Private pointer for the actual implementation
- *
- * The implementation doing the work for the async request needs a
- * current state like for example a fd event. The user of an async
- * request should not touch this.
- */
- void *private_data;
-
- /**
- * @brief Print yourself, for debugging purposes
- *
- * Async requests are opaque data structures. The implementation of an
- * async request can define a custom function to print more debug
- * info.
- */
- char *(*print)(TALLOC_CTX *mem_ctx, struct async_req *);
-
- /**
- * @brief status code when finished
- *
- * This status can be queried in the async completion function. It
- * will be set to 0 when everything went fine.
- **/
- uint64_t error;
-
- /**
- * @brief What to do on completion
- *
- * This is used for the user of an async request, fn is called when
- * the request completes, either successfully or with an error.
- */
- struct {
- /**
- * @brief Completion function
- * Completion function, to be filled by the API user
- */
- void (*fn)(struct async_req *);
- /**
- * @brief Private data for the completion function
- */
- void *priv;
- } async;
-};
-
-struct async_req *async_req_new(TALLOC_CTX *mem_ctx);
-
-char *async_req_print(TALLOC_CTX *mem_ctx, struct async_req *req);
-
-void async_req_done(struct async_req *req);
-
-void async_req_error(struct async_req *req, uint64_t error);
-
-bool async_req_nomem(const void *p, struct async_req *req);
-
-bool async_post_error(struct async_req *req, struct tevent_context *ev,
- uint64_t error);
-
-bool async_req_is_error(struct async_req *req, enum async_req_state *state,
- uint64_t *error);
-
-struct async_req_queue;
-
-struct async_req_queue *async_req_queue_init(TALLOC_CTX *mem_ctx);
-
-bool async_req_enqueue(struct async_req_queue *queue,
- struct tevent_context *ev,
- struct async_req *req,
- void (*trigger)(struct async_req *req));
-
-bool _async_req_setup(TALLOC_CTX *mem_ctx, struct async_req **preq,
- void *pstate, size_t state_size, const char *typename);
-
-#define async_req_setup(_mem_ctx, _preq, _pstate, type) \
- _async_req_setup((_mem_ctx), (_preq), (_pstate), sizeof(type), #type)
-
-
-#endif
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- NTSTATUS wrappers for async_req.h
- Copyright (C) Volker Lendecke 2008, 2009
-
- 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 "lib/tevent/tevent.h"
-#include "lib/talloc/talloc.h"
-#include "lib/util/dlinklist.h"
-#include "lib/async_req/async_req_ntstatus.h"
-
-void async_req_nterror(struct async_req *req, NTSTATUS status)
-{
- async_req_error(req, NT_STATUS_V(status));
-}
-
-bool async_post_ntstatus(struct async_req *req, struct tevent_context *ev,
- NTSTATUS status)
-{
- return async_post_error(req, ev, NT_STATUS_V(status));
-}
-
-bool async_req_is_nterror(struct async_req *req, NTSTATUS *status)
-{
- enum async_req_state state;
- uint64_t error;
-
- if (!async_req_is_error(req, &state, &error)) {
- return false;
- }
- switch (state) {
- case ASYNC_REQ_USER_ERROR:
- *status = NT_STATUS(error);
- break;
- case ASYNC_REQ_TIMED_OUT:
- *status = NT_STATUS_IO_TIMEOUT;
- break;
- case ASYNC_REQ_NO_MEMORY:
- *status = NT_STATUS_NO_MEMORY;
- break;
- default:
- *status = NT_STATUS_INTERNAL_ERROR;
- break;
- }
- return true;
-}
-
-NTSTATUS async_req_simple_recv_ntstatus(struct async_req *req)
-{
- NTSTATUS status;
-
- if (async_req_is_nterror(req, &status)) {
- return status;
- }
- return NT_STATUS_OK;
-}
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- NTSTATUS wrappers for async_req.h
- Copyright (C) Volker Lendecke 2008, 2009
-
- 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/>.
-*/
-
-#ifndef __ASYNC_REQ_NTSTATUS_H__
-#define __ASYNC_REQ_NTSTATUS_H__
-
-#include "lib/async_req/async_req.h"
-#include "includes.h"
-
-void async_req_nterror(struct async_req *req, NTSTATUS status);
-
-bool async_post_ntstatus(struct async_req *req, struct tevent_context *ev,
- NTSTATUS status);
-
-bool async_req_is_nterror(struct async_req *req, NTSTATUS *status);
-
-NTSTATUS async_req_simple_recv_ntstatus(struct async_req *req);
-
-#endif
#include "includes.h"
#include "lib/talloc/talloc.h"
#include "lib/tevent/tevent.h"
-#include "lib/async_req/async_req.h"
#include "lib/async_req/async_sock.h"
#include "lib/util/tevent_unix.h"
#include <fcntl.h>
#define TALLOC_FREE(ctx) do { talloc_free(ctx); ctx=NULL; } while(0)
#endif
-/**
- * @brief Map async_req states to unix-style errnos
- * @param[in] req The async req to get the state from
- * @param[out] err Pointer to take the unix-style errno
- *
- * @return true if the async_req is in an error state, false otherwise
- */
-
-bool async_req_is_errno(struct async_req *req, int *err)
-{
- enum async_req_state state;
- uint64_t error;
-
- if (!async_req_is_error(req, &state, &error)) {
- return false;
- }
-
- switch (state) {
- case ASYNC_REQ_USER_ERROR:
- *err = (int)error;
- break;
- case ASYNC_REQ_TIMED_OUT:
-#ifdef ETIMEDOUT
- *err = ETIMEDOUT;
-#else
- *err = EAGAIN;
-#endif
- break;
- case ASYNC_REQ_NO_MEMORY:
- *err = ENOMEM;
- break;
- default:
- *err = EIO;
- break;
- }
- return true;
-}
-
-int async_req_simple_recv_errno(struct async_req *req)
-{
- int err;
-
- if (async_req_is_errno(req, &err)) {
- return err;
- }
-
- return 0;
-}
-
struct async_send_state {
int fd;
const void *buf;
#include "includes.h"
-bool async_req_is_errno(struct async_req *req, int *err);
-int async_req_simple_recv_errno(struct async_req *req);
-
struct tevent_req *async_send_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
int fd, const void *buf, size_t len,
[SUBSYSTEM::LIBASYNC_REQ]
-LIBASYNC_REQ_OBJ_FILES = $(addprefix ../lib/async_req/, async_req.o async_sock.o async_req_ntstatus.o)
+LIBASYNC_REQ_OBJ_FILES = $(addprefix ../lib/async_req/, async_sock.o)
lib/messages.o librpc/gen_ndr/ndr_messaging.o lib/messages_local.o \
lib/messages_ctdbd.o lib/packet.o lib/ctdbd_conn.o \
lib/interfaces.o lib/memcache.o \
- lib/util_transfer_file.o ../lib/async_req/async_req.o \
- ../lib/async_req/async_sock.o ../lib/async_req/async_req_ntstatus.o \
+ lib/util_transfer_file.o ../lib/async_req/async_sock.o \
$(TDB_LIB_OBJ) \
$(VERSION_OBJ) lib/charcnv.o lib/debug.o lib/fault.o \
lib/interface.o lib/pidfile.o \
#include "ctdbd_conn.h"
#include "../lib/util/talloc_stack.h"
#include "memcache.h"
-#include "../lib/async_req/async_req_ntstatus.h"
#include "async_smb.h"
#include "../lib/async_req/async_sock.h"
#include "services.h"
git.samba.org / ira / wip.git / commitdiff