From: "Yan, Zheng" <zyan@redhat.com>
Date: Wed, 16 Aug 2017 17:24:58 +0800
Subject: ceph: include snapc in debug message of write
Git-commit: 1c0a9c2d978360493054315196c51d8328fa7fae
Patch-mainline: v4.14-rc1
References: FATE#324714

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/ceph/addr.c |  4 ++--
 fs/ceph/file.c | 11 ++++++-----
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 825931516623..0b073b6a2616 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -569,8 +569,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
 	if (snap_size < page_off + len)
 		len = snap_size - page_off;
 
-	dout("writepage %p page %p index %lu on %llu~%u snapc %p\n",
-	     inode, page, page->index, page_off, len, snapc);
+	dout("writepage %p page %p index %lu on %llu~%u snapc %p seq %lld\n",
+	     inode, page, page->index, page_off, len, snapc, snapc->seq);
 
 	writeback_stat = atomic_long_inc_return(&fsc->writeback_count);
 	if (writeback_stat >
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 1ce80f66e9e5..f602b3ee6c59 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -562,8 +562,7 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
 	ssize_t ret;
 	size_t len = iov_iter_count(to);
 
-	dout("sync_read on file %p %llu~%u %s\n", file, off,
-	     (unsigned)len,
+	dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len,
 	     (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
 
 	if (!len)
@@ -846,8 +845,9 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
 	if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
 		return -EROFS;
 
-	dout("sync_direct_read_write (%s) on file %p %lld~%u\n",
-	     (write ? "write" : "read"), file, pos, (unsigned)count);
+	dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
+	     (write ? "write" : "read"), file, pos, (unsigned)count,
+	     snapc, snapc->seq);
 
 	ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
 	if (ret < 0)
@@ -1050,7 +1050,8 @@ ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
 	if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
 		return -EROFS;
 
-	dout("sync_write on file %p %lld~%u\n", file, pos, (unsigned)count);
+	dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
+	     file, pos, (unsigned)count, snapc, snapc->seq);
 
 	ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
 	if (ret < 0)