nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 10 insertions, 11 deletions

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 452e71a1b753..6690269f5dde 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -205,7 +205,7 @@ static int readpage_nounlock(struct file *filp, struct page *page)
 	dout("readpage inode %p file %p page %p index %lu\n",
 	     inode, filp, page, page->index);
 	err = ceph_osdc_readpages(osdc, ceph_vino(inode), &ci->i_layout,
-				  page->index << PAGE_CACHE_SHIFT, &len,
+				  (u64) page_offset(page), &len,
 				  ci->i_truncate_seq, ci->i_truncate_size,
 				  &page, 1, 0);
 	if (err == -ENOENT)
@@ -286,7 +286,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
 	int nr_pages = 0;
 	int ret;
 
-	off = page->index << PAGE_CACHE_SHIFT;
+	off = (u64) page_offset(page);
 
 	/* count pages */
 	next_index = page->index;
@@ -308,8 +308,8 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
 				    NULL, 0,
 				    ci->i_truncate_seq, ci->i_truncate_size,
 				    NULL, false, 1, 0);
-	if (!req)
-		return -ENOMEM;
+	if (IS_ERR(req))
+		return PTR_ERR(req);
 
 	/* build page vector */
 	nr_pages = len >> PAGE_CACHE_SHIFT;
@@ -426,7 +426,7 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
 	struct ceph_inode_info *ci;
 	struct ceph_fs_client *fsc;
 	struct ceph_osd_client *osdc;
-	loff_t page_off = page->index << PAGE_CACHE_SHIFT;
+	loff_t page_off = page_offset(page);
 	int len = PAGE_CACHE_SIZE;
 	loff_t i_size;
 	int err = 0;
@@ -817,8 +817,7 @@ get_more_pages:
 			/* ok */
 			if (locked_pages == 0) {
 				/* prepare async write request */
-				offset = (unsigned long long)page->index
-					<< PAGE_CACHE_SHIFT;
+				offset = (u64) page_offset(page);
 				len = wsize;
 				req = ceph_osdc_new_request(&fsc->client->osdc,
 					    &ci->i_layout,
@@ -832,8 +831,8 @@ get_more_pages:
 					    ci->i_truncate_size,
 					    &inode->i_mtime, true, 1, 0);
 
-				if (!req) {
-					rc = -ENOMEM;
+				if (IS_ERR(req)) {
+					rc = PTR_ERR(req);
 					unlock_page(page);
 					break;
 				}
@@ -1180,7 +1179,7 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	struct inode *inode = vma->vm_file->f_dentry->d_inode;
 	struct page *page = vmf->page;
 	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
-	loff_t off = page->index << PAGE_CACHE_SHIFT;
+	loff_t off = page_offset(page);
 	loff_t size, len;
 	int ret;
 
@@ -1225,6 +1224,7 @@ out:
 static struct vm_operations_struct ceph_vmops = {
 	.fault		= filemap_fault,
 	.page_mkwrite	= ceph_page_mkwrite,
+	.remap_pages	= generic_file_remap_pages,
 };
 
 int ceph_mmap(struct file *file, struct vm_area_struct *vma)
@@ -1235,6 +1235,5 @@ int ceph_mmap(struct file *file, struct vm_area_struct *vma)
 		return -ENOEXEC;
 	file_accessed(file);
 	vma->vm_ops = &ceph_vmops;
-	vma->vm_flags |= VM_CAN_NONLINEAR;
 	return 0;
 }