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| author | Simon Derr <simon.derr@bull.net> | 2013-06-21 15:32:43 +0200 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2013-07-07 22:18:18 -0500 |
| commit | 80b45261a0b263536b043c5ccfc4ba4fc27c2acc (patch) | |
| tree | b4d06110f4f121b8e2c26e521c164f5c668e2cc0 /net/9p | |
| parent | 1cff33069a4a1ac9ed080756113ecd17ad408282 (diff) | |
| download | linux-80b45261a0b263536b043c5ccfc4ba4fc27c2acc.tar.gz linux-80b45261a0b263536b043c5ccfc4ba4fc27c2acc.tar.bz2 linux-80b45261a0b263536b043c5ccfc4ba4fc27c2acc.zip | |
9P: Add cancelled() to the transport functions.
RDMA needs to post a buffer for each incoming reply.
Hence it needs to keep count of these and needs to be
aware of whether a flushed request has received a reply
or not.
This patch adds the cancelled() callback to the transport modules.
It is called when RFLUSH has been received and that the corresponding
request will never receive a reply.
Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p')
| -rw-r--r-- | net/9p/client.c | 12 | ||||
| -rw-r--r-- | net/9p/trans_rdma.c | 11 |
2 files changed, 20 insertions, 3 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index d18a0b22f62c..8b93cae2d11d 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -658,12 +658,18 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) /* * if we haven't received a response for oldreq, - * remove it from the list. + * remove it from the list, and notify the transport + * layer that the reply will never arrive. */ spin_lock(&c->lock); - if (oldreq->status == REQ_STATUS_FLSH) + if (oldreq->status == REQ_STATUS_FLSH) { list_del(&oldreq->req_list); - spin_unlock(&c->lock); + spin_unlock(&c->lock); + if (c->trans_mod->cancelled) + c->trans_mod->cancelled(c, req); + } else { + spin_unlock(&c->lock); + } p9_free_req(c, req); return 0; diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index 8f68df5d2973..928f2bb9bf8d 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -588,6 +588,17 @@ static int rdma_cancel(struct p9_client *client, struct p9_req_t *req) return 1; } +/* A request has been fully flushed without a reply. + * That means we have posted one buffer in excess. + */ +static int rdma_cancelled(struct p9_client *client, struct p9_req_t *req) +{ + struct p9_trans_rdma *rdma = client->trans; + + atomic_inc(&rdma->excess_rc); + return 0; +} + /** * trans_create_rdma - Transport method for creating atransport instance * @client: client instance |