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Commit 22cd1bf1 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Trond Myklebust
Browse files

nfs: merge nfs_direct_write into nfs_file_direct_write 



Simple code cleanup to prepare for later fixes.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 14a3ec79

fs/nfs/direct.c

+41 −50
Original line number Diff line number Diff line
@@ -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) {

	result = -ENOMEM;

	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);

		if (result > 0) {

			struct inode *inode = mapping->host;



		iocb->ki_pos = pos + retval;

			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;

}



/**