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Commit 54ad023b authored by Sage Weil's avatar Sage Weil
Browse files

ceph: don't use writeback_control in writepages completion 



The ->writepages writeback_control is not still valid in the writepages
completion.  We were touching it solely to adjust pages_skipped when there
was a writeback error (EIO, ENOSPC, EPERM due to bad osd credentials),
causing an oops in the writeback code shortly thereafter.  Updating
pages_skipped on error isn't correct anyway, so let's just rip out this
(clearly broken) code to pass the wbc to the completion.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent 5dfc589a

fs/ceph/addr.c

+0 −6
Original line number Diff line number Diff line
@@ -504,7 +504,6 @@ static void writepages_finish(struct ceph_osd_request *req, 
	int i;

	struct ceph_snap_context *snapc = req->r_snapc;

	struct address_space *mapping = inode->i_mapping;

	struct writeback_control *wbc = req->r_wbc;

	__s32 rc = -EIO;

	u64 bytes = 0;

	struct ceph_client *client = ceph_inode_to_client(inode);
@@ -546,10 +545,6 @@ static void writepages_finish(struct ceph_osd_request *req, 
			clear_bdi_congested(&client->backing_dev_info,

					    BLK_RW_ASYNC);



		if (i >= wrote) {

			dout("inode %p skipping page %p\n", inode, page);

			wbc->pages_skipped++;

		}

		ceph_put_snap_context((void *)page->private);

		page->private = 0;

		ClearPagePrivate(page);
@@ -799,7 +794,6 @@ get_more_pages: 
				alloc_page_vec(client, req);

				req->r_callback = writepages_finish;

				req->r_inode = inode;

				req->r_wbc = wbc;

			}



			/* note position of first page in pvec */

fs/ceph/osd_client.h

+0 −1
Original line number Diff line number Diff line
@@ -66,7 +66,6 @@ struct ceph_osd_request { 
	struct list_head  r_unsafe_item;



	struct inode *r_inode;         	      /* for use by callbacks */

	struct writeback_control *r_wbc;      /* ditto */



	char              r_oid[40];          /* object name */

	int               r_oid_len;