diff options
Diffstat (limited to 'source3/smbd/oplock.c')
| -rw-r--r-- | source3/smbd/oplock.c | 66 |
1 files changed, 58 insertions, 8 deletions
diff --git a/source3/smbd/oplock.c b/source3/smbd/oplock.c index 2197c7947f..0c4155d9d6 100644 --- a/source3/smbd/oplock.c +++ b/source3/smbd/oplock.c @@ -735,6 +735,12 @@ static void process_open_retry_message(struct messaging_context *msg_ctx, schedule_deferred_open_message_smb(sconn, msg.op_mid); } +struct break_to_none_state { + struct smbd_server_connection *sconn; + struct file_id id; +}; +static void do_break_to_none(struct tevent_req *req); + /**************************************************************************** This function is called on any file modification or lock request. If a file is level 2 oplocked then it must tell all other level 2 holders to break to @@ -744,8 +750,9 @@ static void process_open_retry_message(struct messaging_context *msg_ctx, static void contend_level2_oplocks_begin_default(files_struct *fsp, enum level2_contention_type type) { - int i; - struct share_mode_lock *lck; + struct smbd_server_connection *sconn = fsp->conn->sconn; + struct tevent_req *req; + struct break_to_none_state *state; /* * If this file is level II oplocked then we need @@ -758,12 +765,52 @@ static void contend_level2_oplocks_begin_default(files_struct *fsp, if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type)) return; - lck = get_share_mode_lock(talloc_tos(), fsp->file_id); - if (lck == NULL) { - DEBUG(0,("release_level_2_oplocks_on_change: failed to lock " - "share mode entry for file %s.\n", fsp_str_dbg(fsp))); + /* + * When we get here we might have a brlock entry locked. Also + * locking the share mode entry would violate the locking + * order. Breaking level2 oplocks to none is asynchronous + * anyway, so we postpone this into an immediate timed event. + */ + + state = talloc(sconn, struct break_to_none_state); + if (state == NULL) { + DEBUG(1, ("talloc failed\n")); + return; + } + state->sconn = sconn; + state->id = fsp->file_id; + + req = tevent_wakeup_send(state, sconn->ev_ctx, timeval_set(0, 0)); + if (req == NULL) { + DEBUG(1, ("tevent_wakeup_send failed\n")); + TALLOC_FREE(state); return; } + tevent_req_set_callback(req, do_break_to_none, state); + return; +} + +static void do_break_to_none(struct tevent_req *req) +{ + struct break_to_none_state *state = tevent_req_callback_data( + req, struct break_to_none_state); + bool ret; + int i; + struct share_mode_lock *lck; + + ret = tevent_wakeup_recv(req); + TALLOC_FREE(req); + if (!ret) { + DEBUG(1, ("tevent_wakeup_recv failed\n")); + goto done; + } + lck = get_share_mode_lock(talloc_tos(), state->id); + if (lck == NULL) { + DEBUG(1, ("release_level_2_oplocks_on_change: failed to lock " + "share mode entry for file %s.\n", + file_id_string_tos(&state->id))); + goto done; + } DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n", lck->data->num_share_modes )); @@ -820,7 +867,7 @@ static void contend_level2_oplocks_begin_default(files_struct *fsp, if (procid_is_me(&share_entry->pid)) { struct files_struct *cur_fsp = - initial_break_processing(fsp->conn->sconn, + initial_break_processing(state->sconn, share_entry->id, share_entry->share_file_id); wait_before_sending_break(); @@ -831,7 +878,7 @@ static void contend_level2_oplocks_begin_default(files_struct *fsp, "Did not find fsp, ignoring\n")); } } else { - messaging_send_buf(fsp->conn->sconn->msg_ctx, + messaging_send_buf(state->sconn->msg_ctx, share_entry->pid, MSG_SMB_ASYNC_LEVEL2_BREAK, (uint8 *)msg, @@ -843,6 +890,9 @@ static void contend_level2_oplocks_begin_default(files_struct *fsp, in the share mode lock db. */ TALLOC_FREE(lck); +done: + TALLOC_FREE(state); + return; } void smbd_contend_level2_oplocks_begin(files_struct *fsp, |