diff mbox series

[2/6] ceph: rework PageFsCache handling

Message ID 20210126134103.240031-3-jlayton@kernel.org (mailing list archive)
State New, archived
Headers show
Series ceph: convert to new netfs read helpers | expand

Commit Message

Jeff Layton Jan. 26, 2021, 1:40 p.m. UTC
With the new fscache API, the PageFsCache bit now indicates that the
page is being written to the cache and shouldn't be modified or released
until it's finished.

Change releasepage and invalidatepage to wait on that bit before
returning.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/addr.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 2b17bb36e548..fbfa49db06fd 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -146,6 +146,8 @@  static void ceph_invalidatepage(struct page *page, unsigned int offset,
 	struct ceph_inode_info *ci;
 	struct ceph_snap_context *snapc = page_snap_context(page);
 
+	wait_on_page_fscache(page);
+
 	inode = page->mapping->host;
 	ci = ceph_inode(inode);
 
@@ -168,11 +170,16 @@  static void ceph_invalidatepage(struct page *page, unsigned int offset,
 	ClearPagePrivate(page);
 }
 
-static int ceph_releasepage(struct page *page, gfp_t g)
+static int ceph_releasepage(struct page *page, gfp_t gfp_flags)
 {
 	dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host,
 	     page, page->index, PageDirty(page) ? "" : "not ");
 
+	if (PageFsCache(page)) {
+		if (!(gfp_flags & __GFP_DIRECT_RECLAIM) || !(gfp_flags & __GFP_FS))
+			return 0;
+		wait_on_page_fscache(page);
+	}
 	return !PagePrivate(page);
 }