kernel/git/stable/linux.git/net/9p/client.c, branch linux-3.11.y

9P: Add cancelled() to the transport functions.

2013-07-08T03:18:18+00:00

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 Signed-off-by: Eric Van Hensbergen

9P/RDMA: count posted buffers without a pending request

2013-07-08T03:04:36+00:00

In rdma_request(): If an error occurs between posting the recv and the send, there will be a reply context posted without a pending request. Since there is no way to "un-post" it, we remember it and skip post_recv() for the next request. Signed-off-by: Simon Derr Signed-off-by: Eric Van Hensbergen

9pnet: refactor struct p9_fcall alloc code

2013-07-08T03:02:27+00:00

Signed-off-by: Simon Derr Signed-off-by: Eric Van Hensbergen

9P: Fix fcall allocation for rdma

2013-07-08T03:02:26+00:00

The current code assumes that when a request in the request array does have a tc, it also has a rc. This is normally true, but not always : when using RDMA, req->rc will temporarily be set to NULL after the request has been sent. That is usually OK though, as when the reply arrives, req->rc will be reassigned to a sane value before the request is recycled. But there is a catch : if the request is flushed, the reply will never arrive, and req->rc will be NULL, but not req->tc. This patch fixes p9_tag_alloc to take this into account. Signed-off-by: Simon Derr Signed-off-by: Eric Van Hensbergen

net/9p: Handle error in zero copy request correctly for 9p2000.u

2013-05-28T14:28:42+00:00

For zero copy request, error will be encoded in the user space buffer. So copy the error code correctly using copy_from_user. Here we use the extra bytes we allocate for zero copy request. If total error details are more than P9_ZC_HDR_SZ - 7 bytes, we return -EFAULT. The patch also avoid a memory allocation in the error path. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Eric Van Hensbergen

net/9p: Use virtio transpart as the default transport

2013-05-28T14:28:42+00:00

Make the default 9p experience better by defaulting to virtio transport if present. These days most of the users are using 9p in a virtualized setup Signed-off-by: Aneesh Kumar K.V Signed-off-by: Eric Van Hensbergen

net/9p: Make 9P2000.L the default protocol for 9p file system

2013-05-28T14:28:42+00:00

If we dont' specify a protocol version default to 9P2000.L. 9P2000.L have better support for posix semantic and is where all the recent development is happening. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Eric Van Hensbergen

9p: Modify the stat structures to use kuid_t and kgid_t

2013-02-12T11:19:31+00:00

9p has thre strucrtures that can encode inode stat information. Modify all of those structures to contain kuid_t and kgid_t values. Modify he wire encoders and decoders of those structures to use 'u' and 'g' instead of 'd' in the format string where uids and gids are present. This results in all kuid and kgid conversion to and from on the wire values being performed by the same code in protocol.c where the client is known at the time of the conversion. Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Eric W. Biederman

9p: Transmit kuid and kgid values

2013-02-12T11:19:30+00:00

Modify the p9_client_rpc format specifiers of every function that directly transmits a uid or a gid from 'd' to 'u' or 'g' as appropriate. Modify those same functions to take kuid_t and kgid_t parameters instead of uid_t and gid_t parameters. Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Eric W. Biederman

net/9p: Check errno validity

2012-09-06T18:54:55+00:00

While working on a modified server I had the Linux clients crash a few times. This lead me to find this: Some error codes are directly extracted from the server replies. A malformed server reply could contain an invalid error code, with a very large value. If this value is then passed to ERR_PTR() it will not be properly detected as an error code by IS_ERR() and as a result the kernel will dereference an invalid pointer. This patch tries to avoid this. Signed-off-by: Simon Derr Signed-off-by: Eric Van Hensbergen