static void
handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma,
struct p9_rdma_context *c, enum ib_wc_status status, u32 byte_len)
{
struct p9_req_t *req;
int err = 0;
int16_t tag;
req = NULL;
ib_dma_unmap_single(rdma->cm_id->device, c->busa, client->msize,
DMA_FROM_DEVICE);
if (status != IB_WC_SUCCESS)
goto err_out;
err = p9_parse_header(c->rc, NULL, NULL, &tag, 1);
if (err)
goto err_out;
req = p9_tag_lookup(client, tag);
if (!req)
goto err_out;
req->rc = c->rc;
p9_client_cb(client, req);
return;
err_out:
P9_DPRINTK(P9_DEBUG_ERROR, "req %p err %d status %d\n",
req, err, status);
rdma->state = P9_RDMA_FLUSHING;
client->status = Disconnected;
return;
}
static void p9_xosclient_rerror(struct p9_req_t *req)
{
struct p9_fcall *rcall;
u16 tag;
struct p9_xos_device *dev = (struct p9_xos_device *)req->aux;
struct p9_xos_endpoint *ep = &dev->driver->ep[RD_EP];
unsigned long flags;
if (p9_parse_header(req->tc, &req->tc->size, &req->tc->id, &tag, 1))
warning("Failed to decode header !");
kfree(req->tc);
spin_lock_irqsave(&dev->driver->ep_lock, flags);
p9_xos_deque_push(ep->rqueue, a2n(req->tc->sdata - 8, ep), ep);
nb_free_packets++;
spin_unlock_irqrestore(&dev->driver->ep_lock, flags);
rcall = kmalloc(sizeof(struct p9_fcall) + 32, GFP_KERNEL);
p9pdu_reset(rcall);
rcall->sdata = (u8 *) (rcall + sizeof(struct p9_fcall));
p9pdu_writef(rcall, 0, "dbwT", 0, P9_RERROR, tag,
"9P destination service closed");
p9pdu_finalize(rcall);
req->rc = rcall;
req->tc = NULL;
spin_lock(&dev->lock);
dev->ack_count += 1;
spin_unlock(&dev->lock);
p9_xos_add_write_request(req, 0);
}
static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
{
struct p9_req_t *req;
int16_t oldtag;
int err;
err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
if (err)
return err;
P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
if (IS_ERR(req))
return PTR_ERR(req);
/* if we haven't received a response for oldreq,
remove it from the list. */
spin_lock(&c->lock);
if (oldreq->status == REQ_STATUS_FLSH)
list_del(&oldreq->req_list);
spin_unlock(&c->lock);
p9_free_req(c, req);
return 0;
}
static void
recv_done(struct ib_cq *cq, struct ib_wc *wc)
{
struct p9_client *client = cq->cq_context;
struct p9_trans_rdma *rdma = client->trans;
struct p9_rdma_context *c =
container_of(wc->wr_cqe, struct p9_rdma_context, cqe);
struct p9_req_t *req;
int err = 0;
int16_t tag;
req = NULL;
ib_dma_unmap_single(rdma->cm_id->device, c->busa, client->msize,
DMA_FROM_DEVICE);
if (wc->status != IB_WC_SUCCESS)
goto err_out;
c->rc.size = wc->byte_len;
err = p9_parse_header(&c->rc, NULL, NULL, &tag, 1);
if (err)
goto err_out;
req = p9_tag_lookup(client, tag);
if (!req)
goto err_out;
/* Check that we have not yet received a reply for this request.
*/
if (unlikely(req->rc.sdata)) {
pr_err("Duplicate reply for request %d", tag);
goto err_out;
}
req->rc.size = c->rc.size;
req->rc.sdata = c->rc.sdata;
p9_client_cb(client, req, REQ_STATUS_RCVD);
out:
up(&rdma->rq_sem);
kfree(c);
return;
err_out:
p9_debug(P9_DEBUG_ERROR, "req %p err %d status %d\n",
req, err, wc->status);
rdma->state = P9_RDMA_FLUSHING;
client->status = Disconnected;
goto out;
}
static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
{
int8_t type;
int err;
err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
if (err) {
P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
return err;
}
if (type == P9_RERROR) {
int ecode;
char *ename;
err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode);
if (err) {
P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
err);
return err;
}
if (c->dotu)
err = -ecode;
if (!err) {
err = p9_errstr2errno(ename, strlen(ename));
/* string match failed */
if (!err)
err = -ESERVERFAULT;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
kfree(ename);
} else
err = 0;
return err;
}
static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
{
struct p9_req_t *req;
int16_t oldtag;
int err;
err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
if (err)
return err;
P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
if (IS_ERR(req))
return PTR_ERR(req);
req->flush_tag = oldtag;
/* we don't free anything here because RPC isn't complete */
return 0;
}
static void
handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma,
struct p9_rdma_context *c, enum ib_wc_status status, u32 byte_len)
{
struct p9_req_t *req;
int err = 0;
int16_t tag;
req = NULL;
ib_dma_unmap_single(rdma->cm_id->device, c->busa, client->msize,
DMA_FROM_DEVICE);
if (status != IB_WC_SUCCESS)
goto err_out;
err = p9_parse_header(c->rc, NULL, NULL, &tag, 1);
if (err)
goto err_out;
req = p9_tag_lookup(client, tag);
if (!req)
goto err_out;
/* Check that we have not yet received a reply for this request.
*/
if (unlikely(req->rc)) {
pr_err("Duplicate reply for request %d", tag);
goto err_out;
}
req->rc = c->rc;
p9_client_cb(client, req, REQ_STATUS_RCVD);
return;
err_out:
p9_debug(P9_DEBUG_ERROR, "req %p err %d status %d\n", req, err, status);
rdma->state = P9_RDMA_FLUSHING;
client->status = Disconnected;
}
