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ldb: Add ldb_handle_get_event_context()

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This will allow us to obtain a private event context for use while we hold
locks in ldb_tdb, that is not shared with the global state of the application.

This will ensure we do not perform other operations while we hold the lock

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This commit is contained in:
Andrew Bartlett 2017-05-04 11:39:21 +02:00
parent 1ba6b9aae8
commit a83df55693
4 changed files with 24 additions and 0 deletions
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1
lib/ldb/ABI/ldb-1.1.29.sigs
View File

@ -94,6 +94,7 @@ ldb_get_opaque: void *(struct ldb_context *, const char *)
ldb_get_root_basedn: struct ldb_dn *(struct ldb_context *)
ldb_get_schema_basedn: struct ldb_dn *(struct ldb_context *)
ldb_global_init: int (void)
ldb_handle_get_event_context: struct tevent_context *(struct ldb_handle *)
ldb_handle_new: struct ldb_handle *(TALLOC_CTX *, struct ldb_context *)
ldb_handler_copy: int (struct ldb_context *, void *, const struct ldb_val *, struct ldb_val *)
ldb_handler_fold: int (struct ldb_context *, void *, const struct ldb_val *, struct ldb_val *)

13
lib/ldb/common/ldb.c
View File

@ -745,6 +745,19 @@ int ldb_request_get_status(struct ldb_request *req)
return req->handle->status;
}
/*
* This function obtains the private event context for the handle,
* which may have been created to avoid nested event loops during
* ldb_tdb with the locks held
*/
struct tevent_context *ldb_handle_get_event_context(struct ldb_handle *handle)
{
if (handle->event_context != NULL) {
return handle->event_context;
}
return ldb_get_event_context(handle->ldb);
}
/*
trace a ldb request

7
lib/ldb/include/ldb_module.h
View File

@ -210,6 +210,13 @@ int ldb_register_backend(const char *url_prefix, ldb_connect_fn, bool);
struct ldb_handle *ldb_handle_new(TALLOC_CTX *mem_ctx, struct ldb_context *ldb);
/*
* This function obtains the private event context for the handle,
* which may have been created to avoid nested event loops during
* ldb_tdb with the locks held
*/
struct tevent_context *ldb_handle_get_event_context(struct ldb_handle *handle);
int ldb_module_send_entry(struct ldb_request *req,
struct ldb_message *msg,
struct ldb_control **ctrls);

3
lib/ldb/include/ldb_private.h
View File

@ -62,6 +62,9 @@ struct ldb_handle {
uint32_t custom_flags;
unsigned nesting;
/* Private event context (if not NULL) */
struct tevent_context *event_context;
/* used for debugging */
struct ldb_request *parent;
const char *location;