ceph: fix freeing inode vs removing session caps race
remove_session_caps() uses iterate_session_caps() to remove caps,
but iterate_session_caps() skips inodes that are being deleted.
So session->s_nr_caps can be non-zero after iterate_session_caps()
return.
We can fix the issue by waiting until deletions are complete.
__wait_on_freeing_inode() is designed for the job, but it is not
exported, so we use lookup inode function to access it.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index cbded57..afcd62a6 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -677,6 +677,8 @@
extern struct inode *ceph_get_inode(struct super_block *sb,
struct ceph_vino vino);
+extern struct inode *ceph_lookup_inode(struct super_block *sb,
+ struct ceph_vino vino);
extern struct inode *ceph_get_snapdir(struct inode *parent);
extern int ceph_fill_file_size(struct inode *inode, int issued,
u32 truncate_seq, u64 truncate_size, u64 size);