ceph: pass inclusive lend parameter to filemap_write_and_wait_range()

The 'lend' parameter of filemap_write_and_wait_range is required to be
inclusive, so follow the rule. Same for invalidate_inode_pages2_range.

Signed-off-by: zhengbin <zhengbin13@huawei.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 189df668b6a0..9f53c3d99304 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -590,7 +590,8 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
          * but it will at least behave sensibly when they are
          * in sequence.
          */
-        ret = filemap_write_and_wait_range(inode->i_mapping, off, off + len);
+        ret = filemap_write_and_wait_range(inode->i_mapping,
+                                           off, off + len - 1);
         if (ret < 0)
                 return ret;
 
@@ -929,14 +930,15 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
              (write ? "write" : "read"), file, pos, (unsigned)count,
              snapc, snapc->seq);
 
-        ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
+        ret = filemap_write_and_wait_range(inode->i_mapping,
+                                           pos, pos + count - 1);
         if (ret < 0)
                 return ret;
 
         if (write) {
                 int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
                                         pos >> PAGE_SHIFT,
-                                        (pos + count) >> PAGE_SHIFT);
+                                        (pos + count - 1) >> PAGE_SHIFT);
                 if (ret2 < 0)
                         dout("invalidate_inode_pages2_range returned %d\n", ret2);
 
@@ -1132,13 +1134,14 @@ ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
         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);
+        ret = filemap_write_and_wait_range(inode->i_mapping,
+                                           pos, pos + count - 1);
         if (ret < 0)
                 return ret;
 
         ret = invalidate_inode_pages2_range(inode->i_mapping,
                                             pos >> PAGE_SHIFT,
-                                            (pos + count) >> PAGE_SHIFT);
+                                            (pos + count - 1) >> PAGE_SHIFT);
         if (ret < 0)
                 dout("invalidate_inode_pages2_range returned %d\n", ret);