NFS: Remove pNFS bloat from the generic write path
We have no business doing any this in the standard write release path.
Get rid of it, and put it in the pNFS layer.
Also, while we're at it, get rid of the completely bogus unlock/relock
semantics that were present in nfs_writeback_release_full(). It is
not only unnecessary, but actually dangerous to release the write lock
just in order to take it again in nfs_page_async_flush(). Better just
to open code the pgio operations in a pnfs helper.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 1dda78d..0c38852 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1052,7 +1052,7 @@
.pg_doio = nfs_generic_pg_writepages,
};
-static void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio,
+void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags)
{
nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops,
@@ -1166,13 +1166,7 @@
static void nfs_writeback_release_full(void *calldata)
{
struct nfs_write_data *data = calldata;
- int ret, status = data->task.tk_status;
- struct nfs_pageio_descriptor pgio;
-
- if (data->pnfs_error) {
- nfs_pageio_init_write_mds(&pgio, data->inode, FLUSH_STABLE);
- pgio.pg_recoalesce = 1;
- }
+ int status = data->task.tk_status;
/* Update attributes as result of writeback. */
while (!list_empty(&data->pages)) {
@@ -1188,11 +1182,6 @@
req->wb_bytes,
(long long)req_offset(req));
- if (data->pnfs_error) {
- dprintk(", pnfs error = %d\n", data->pnfs_error);
- goto next;
- }
-
if (status < 0) {
nfs_set_pageerror(page);
nfs_context_set_write_error(req->wb_context, status);
@@ -1212,19 +1201,7 @@
next:
nfs_clear_page_tag_locked(req);
nfs_end_page_writeback(page);
- if (data->pnfs_error) {
- lock_page(page);
- nfs_pageio_cond_complete(&pgio, page->index);
- ret = nfs_page_async_flush(&pgio, page, 0);
- if (ret) {
- nfs_set_pageerror(page);
- dprintk("rewrite to MDS error = %d\n", ret);
- }
- unlock_page(page);
- }
}
- if (data->pnfs_error)
- nfs_pageio_complete(&pgio);
nfs_writedata_release(calldata);
}