orangefs: implement writepage
Now orangefs_inode_getattr fills from cache if an inode has dirty pages.
also if attr_valid and dirty pages and !flags, we spin on inode writeback
before returning if pages still dirty after: should it be other way
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 31ee3cb6..3b54974 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -15,6 +15,50 @@
#include "orangefs-kernel.h"
#include "orangefs-bufmap.h"
+static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ struct iov_iter iter;
+ struct bio_vec bv;
+ size_t len, wlen;
+ ssize_t ret;
+ loff_t off;
+
+ set_page_writeback(page);
+
+ off = page_offset(page);
+ len = i_size_read(inode);
+ if (off > len) {
+ /* The file was truncated; there is nothing to write. */
+ unlock_page(page);
+ end_page_writeback(page);
+ return 0;
+ }
+ if (off + PAGE_SIZE > len)
+ wlen = len - off;
+ else
+ wlen = PAGE_SIZE;
+
+ bv.bv_page = page;
+ bv.bv_len = wlen;
+ bv.bv_offset = off % PAGE_SIZE;
+ if (wlen == 0)
+ dump_stack();
+ iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
+
+ ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
+ len);
+ if (ret < 0) {
+ SetPageError(page);
+ mapping_set_error(page->mapping, ret);
+ } else {
+ ret = 0;
+ }
+ unlock_page(page);
+ end_page_writeback(page);
+ return ret;
+}
+
static int orangefs_readpage(struct file *file, struct page *page)
{
struct inode *inode = page->mapping->host;
@@ -48,6 +92,15 @@ static int orangefs_readpage(struct file *file, struct page *page)
return ret;
}
+static int orangefs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
+{
+ int r;
+ r = simple_write_end(file, mapping, pos, len, copied, page, fsdata);
+ mark_inode_dirty_sync(file_inode(file));
+ return r;
+}
+
static void orangefs_invalidatepage(struct page *page,
unsigned int offset,
unsigned int length)
@@ -77,17 +130,17 @@ static ssize_t orangefs_direct_IO(struct kiocb *iocb,
{
struct file *file = iocb->ki_filp;
loff_t pos = *(&iocb->ki_pos);
- /*
- * This cannot happen until write_iter becomes
- * generic_file_write_iter.
- */
- BUG_ON(iov_iter_rw(iter) != READ);
- return do_readv_writev(ORANGEFS_IO_READ, file, &pos, iter);
+ return do_readv_writev(iov_iter_rw(iter) == WRITE ?
+ ORANGEFS_IO_WRITE : ORANGEFS_IO_READ, file, &pos, iter);
}
/** ORANGEFS2 implementation of address space operations */
static const struct address_space_operations orangefs_address_operations = {
+ .writepage = orangefs_writepage,
.readpage = orangefs_readpage,
+ .set_page_dirty = __set_page_dirty_nobuffers,
+ .write_begin = simple_write_begin,
+ .write_end = orangefs_write_end,
.invalidatepage = orangefs_invalidatepage,
.releasepage = orangefs_releasepage,
.direct_IO = orangefs_direct_IO,