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| author | Peng Tao <bergwolf@gmail.com> | 2011-09-22 21:50:10 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-10-18 09:08:12 -0700 |
| commit | c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9 (patch) | |
| tree | ed543930670a47c3cb911d5580941584509b73f2 /net/sunrpc/rpc_pipe.c | |
| parent | fdc17abbc4b6094b34ee8ff5d91eaba8637594a2 (diff) | |
| download | linux-3.10-c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9.tar.gz linux-3.10-c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9.tar.bz2 linux-3.10-c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9.zip | |
SUNRPC/NFS: make rpc pipe upcall generic
The same function is used by idmap, gss and blocklayout code. Make it
generic.
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Cc: stable@kernel.org [3.0]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/rpc_pipe.c')
| -rw-r--r-- | net/sunrpc/rpc_pipe.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index b181e344132..67dbc188438 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -77,6 +77,26 @@ rpc_timeout_upcall_queue(struct work_struct *work) rpc_purge_list(rpci, &free_list, destroy_msg, -ETIMEDOUT); } +ssize_t rpc_pipe_generic_upcall(struct file *filp, struct rpc_pipe_msg *msg, + char __user *dst, size_t buflen) +{ + char *data = (char *)msg->data + msg->copied; + size_t mlen = min(msg->len - msg->copied, buflen); + unsigned long left; + + left = copy_to_user(dst, data, mlen); + if (left == mlen) { + msg->errno = -EFAULT; + return -EFAULT; + } + + mlen -= left; + msg->copied += mlen; + msg->errno = 0; + return mlen; +} +EXPORT_SYMBOL_GPL(rpc_pipe_generic_upcall); + /** * rpc_queue_upcall - queue an upcall message to userspace * @inode: inode of upcall pipe on which to queue given message |