nfs: merge nfs_direct_write into nfs_file_direct_write

Simple code cleanup to prepare for later fixes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index f8b0a81c340e2f606e396b8e92bcc84492fee539..cbfbd17eae85d6e7dd05bb7e0743a2c8b0be1382 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -898,40 +898,6 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
        return 0;
 }
 
-static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
-                               unsigned long nr_segs, loff_t pos,
-                               size_t count, bool uio)
-{
-       ssize_t result = -ENOMEM;
-       struct inode *inode = iocb->ki_filp->f_mapping->host;
-       struct nfs_direct_req *dreq;
-       struct nfs_lock_context *l_ctx;
-
-       dreq = nfs_direct_req_alloc();
-       if (!dreq)
-               goto out;
-
-       dreq->inode = inode;
-       dreq->bytes_left = count;
-       dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
-       l_ctx = nfs_get_lock_context(dreq->ctx);
-       if (IS_ERR(l_ctx)) {
-               result = PTR_ERR(l_ctx);
-               goto out_release;
-       }
-       dreq->l_ctx = l_ctx;
-       if (!is_sync_kiocb(iocb))
-               dreq->iocb = iocb;
-
-       result = nfs_direct_write_schedule_iovec(dreq, iov, nr_segs, pos, uio);
-       if (!result)
-               result = nfs_direct_wait(dreq);
-out_release:
-       nfs_direct_req_release(dreq);
-out:
-       return result;
-}
-
 /**
  * nfs_file_direct_write - file direct write operation for NFS files
  * @iocb: target I/O control block
@@ -957,9 +923,12 @@ out:
 ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
                                unsigned long nr_segs, loff_t pos, bool uio)
 {
-       ssize_t retval = -EINVAL;
+       ssize_t result = -EINVAL;
        struct file *file = iocb->ki_filp;
        struct address_space *mapping = file->f_mapping;
+       struct inode *inode = mapping->host;
+       struct nfs_direct_req *dreq;
+       struct nfs_lock_context *l_ctx;
        size_t count;
 
        count = iov_length(iov, nr_segs);
@@ -968,35 +937,57 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
        dfprintk(FILE, "NFS: direct write(%pD2, %zd@%Ld)\n",
                file, count, (long long) pos);
 
-       retval = generic_write_checks(file, &pos, &count, 0);
-       if (retval)
+       result = generic_write_checks(file, &pos, &count, 0);
+       if (result)
                goto out;
 
-       retval = -EINVAL;
+       result = -EINVAL;
        if ((ssize_t) count < 0)
                goto out;
-       retval = 0;
+       result = 0;
        if (!count)
                goto out;
 
-       retval = nfs_sync_mapping(mapping);
-       if (retval)
+       result = nfs_sync_mapping(mapping);
+       if (result)
                goto out;
 
        task_io_account_write(count);
 
-       retval = nfs_direct_write(iocb, iov, nr_segs, pos, count, uio);
-       if (retval > 0) {
-               struct inode *inode = mapping->host;
+       result = -ENOMEM;
+       dreq = nfs_direct_req_alloc();
+       if (!dreq)
+               goto out;
 
-               iocb->ki_pos = pos + retval;
-               spin_lock(&inode->i_lock);
-               if (i_size_read(inode) < iocb->ki_pos)
-                       i_size_write(inode, iocb->ki_pos);
-               spin_unlock(&inode->i_lock);
+       dreq->inode = inode;
+       dreq->bytes_left = count;
+       dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
+       l_ctx = nfs_get_lock_context(dreq->ctx);
+       if (IS_ERR(l_ctx)) {
+               result = PTR_ERR(l_ctx);
+               goto out_release;
+       }
+       dreq->l_ctx = l_ctx;
+       if (!is_sync_kiocb(iocb))
+               dreq->iocb = iocb;
+
+       result = nfs_direct_write_schedule_iovec(dreq, iov, nr_segs, pos, uio);
+       if (!result) {
+               result = nfs_direct_wait(dreq);
+               if (result > 0) {
+                       struct inode *inode = mapping->host;
+
+                       iocb->ki_pos = pos + result;
+                       spin_lock(&inode->i_lock);
+                       if (i_size_read(inode) < iocb->ki_pos)
+                               i_size_write(inode, iocb->ki_pos);
+                       spin_unlock(&inode->i_lock);
+               }
        }
+out_release:
+       nfs_direct_req_release(dreq);
 out:
-       return retval;
+       return result;
 }
 
 /**