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s3: VFS: vfs_default. Pass in struct vfswrap_pwrite_state as the callback data to the subreq.

Find the req we're finishing off by looking inside vfswrap_pwrite_state.
In a shutdown close the caller calls talloc_free(req), so we can't
access it directly as callback data.

The next commit will NULL out the vfswrap_pwrite_state->req pointer
when a caller calls talloc_free(req), and the request is still in
flight.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14301

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This commit is contained in:
Jeremy Allison 2020-02-27 16:49:38 -08:00
parent 86cc743950
commit 13e25d6838

View File

@ -976,7 +976,7 @@ static struct tevent_req *vfswrap_pwrite_send(struct vfs_handle_struct *handle,
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, vfs_pwrite_done, req);
tevent_req_set_callback(subreq, vfs_pwrite_done, state);
talloc_set_destructor(state, vfs_pwrite_state_destructor);
@ -1017,10 +1017,9 @@ static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state)
static void vfs_pwrite_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct vfswrap_pwrite_state *state = tevent_req_data(
req, struct vfswrap_pwrite_state);
struct vfswrap_pwrite_state *state = tevent_req_callback_data(
subreq, struct vfswrap_pwrite_state);
struct tevent_req *req = state->req;
int ret;
ret = pthreadpool_tevent_job_recv(subreq);