diff mbox series

[v3,2/6] ceph: rework PageFsCache handling

Message ID 20210223130629.249546-3-jlayton@kernel.org
State New
Headers show
Series [v3,1/6] ceph: disable old fscache readpage handling | expand

Commit Message

Jeff Layton Feb. 23, 2021, 1:06 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.

Also define FSCACHE_USE_NEW_IO_API so that we opt into the new fscache
API.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Cc: ceph-devel@vger.kernel.org
Cc: linux-cachefs@redhat.com
Cc: linux-fsdevel@vger.kernel.org
---
 fs/ceph/addr.c  | 9 ++++++++-
 fs/ceph/super.h | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e267aa60c8b6..3936ae3e8dcd 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)
 {
 	dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host,
 	     page, page->index, PageDirty(page) ? "" : "not ");
 
+	if (PageFsCache(page)) {
+		if (!(gfp & __GFP_DIRECT_RECLAIM) || !(gfp & __GFP_FS))
+			return 0;
+		wait_on_page_fscache(page);
+	}
 	return !PagePrivate(page);
 }
 
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 060c93df9b93..2f7e769290c4 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -21,6 +21,7 @@ 
 #include <linux/ceph/libceph.h>
 
 #ifdef CONFIG_CEPH_FSCACHE
+#define FSCACHE_USE_NEW_IO_API
 #include <linux/fscache.h>
 #endif