diff options
Diffstat (limited to 'net/9p/trans_fd.c')
-rw-r--r-- | net/9p/trans_fd.c | 56 |
1 files changed, 41 insertions, 15 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index a9c65f13b7f5..9f020559c192 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -301,7 +301,6 @@ static void p9_read_work(struct work_struct *work) { int n, err; struct p9_conn *m; - int status = REQ_STATUS_ERROR; m = container_of(work, struct p9_conn, rq); @@ -381,11 +380,21 @@ static void p9_read_work(struct work_struct *work) if ((m->req) && (m->rc.offset == m->rc.capacity)) { p9_debug(P9_DEBUG_TRANS, "got new packet\n"); spin_lock(&m->client->lock); - if (m->req->status != REQ_STATUS_ERROR) - status = REQ_STATUS_RCVD; - list_del(&m->req->req_list); - /* update req->status while holding client->lock */ - p9_client_cb(m->client, m->req, status); + if (m->req->status == REQ_STATUS_SENT) { + list_del(&m->req->req_list); + p9_client_cb(m->client, m->req, REQ_STATUS_RCVD); + } else if (m->req->status == REQ_STATUS_FLSHD) { + /* Ignore replies associated with a cancelled request. */ + p9_debug(P9_DEBUG_TRANS, + "Ignore replies associated with a cancelled request\n"); + } else { + spin_unlock(&m->client->lock); + p9_debug(P9_DEBUG_ERROR, + "Request tag %d errored out while we were reading the reply\n", + m->rc.tag); + err = -EIO; + goto error; + } spin_unlock(&m->client->lock); m->rc.sdata = NULL; m->rc.offset = 0; @@ -712,11 +721,20 @@ static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req) { p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req); + spin_lock(&client->lock); + /* Ignore cancelled request if message has been received + * before lock. + */ + if (req->status == REQ_STATUS_RCVD) { + spin_unlock(&client->lock); + return 0; + } + /* we haven't received a response for oldreq, * remove it from the list. */ - spin_lock(&client->lock); list_del(&req->req_list); + req->status = REQ_STATUS_FLSHD; spin_unlock(&client->lock); return 0; @@ -811,20 +829,28 @@ static int p9_fd_open(struct p9_client *client, int rfd, int wfd) return -ENOMEM; ts->rd = fget(rfd); + if (!ts->rd) + goto out_free_ts; + if (!(ts->rd->f_mode & FMODE_READ)) + goto out_put_rd; ts->wr = fget(wfd); - if (!ts->rd || !ts->wr) { - if (ts->rd) - fput(ts->rd); - if (ts->wr) - fput(ts->wr); - kfree(ts); - return -EIO; - } + if (!ts->wr) + goto out_put_rd; + if (!(ts->wr->f_mode & FMODE_WRITE)) + goto out_put_wr; client->trans = ts; client->status = Connected; return 0; + +out_put_wr: + fput(ts->wr); +out_put_rd: + fput(ts->rd); +out_free_ts: + kfree(ts); + return -EIO; } static int p9_socket_open(struct p9_client *client, struct socket *csocket) |