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SUNRPC/NFS: make rpc pipe upcall generic

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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>
This commit is contained in:
Peng Tao
2011-09-22 21:50:10 -04:00
committed by Trond Myklebust
parent fdc17abbc4
commit c1225158a8
7 changed files with 26 additions and 71 deletions
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22
fs/nfs/blocklayout/blocklayoutdev.c
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@@ -79,28 +79,6 @@ int nfs4_blkdev_put(struct block_device *bdev)
return blkdev_put(bdev, FMODE_READ);
}
/*
* Shouldn't there be a rpc_generic_upcall() to do this for us?
*/
ssize_t bl_pipe_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;
}
static struct bl_dev_msg bl_mount_reply;
ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,