ceph: use ceph_evict_inode to cleanup inode's resource

remove_session_caps() relies on __wait_on_freeing_inode(), to wait for
freeing inode to remove its caps. But VFS wakes freeing inode waiters
before calling destroy_inode().

Cc: stable@vger.kernel.org
Link: https://tracker.ceph.com/issues/40102
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

3 files changed, 7 insertions, 4 deletions

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 2c49eb831c6f..a565ab124282 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -526,13 +526,16 @@ void ceph_free_inode(struct inode *inode)
         kmem_cache_free(ceph_inode_cachep, ci);
 }
 
-void ceph_destroy_inode(struct inode *inode)
+void ceph_evict_inode(struct inode *inode)
 {
         struct ceph_inode_info *ci = ceph_inode(inode);
         struct ceph_inode_frag *frag;
         struct rb_node *n;
 
-        dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
+        dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
+
+        truncate_inode_pages_final(&inode->i_data);
+        clear_inode(inode);
 
         ceph_fscache_unregister_inode_cookie(ci);
 
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index c21201a951ce..5f0c950ca966 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -840,10 +840,10 @@ static int ceph_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations ceph_super_ops = {
         .alloc_inode    = ceph_alloc_inode,
-        .destroy_inode  = ceph_destroy_inode,
         .free_inode     = ceph_free_inode,
         .write_inode    = ceph_write_inode,
         .drop_inode     = ceph_drop_inode,
+        .evict_inode    = ceph_evict_inode,
         .sync_fs        = ceph_sync_fs,
         .put_super      = ceph_put_super,
         .remount_fs     = ceph_remount,
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index a592d4a8266c..30e9a4e415cc 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -884,7 +884,7 @@ static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
 extern const struct inode_operations ceph_file_iops;
 
 extern struct inode *ceph_alloc_inode(struct super_block *sb);
-extern void ceph_destroy_inode(struct inode *inode);
+extern void ceph_evict_inode(struct inode *inode);
 extern void ceph_free_inode(struct inode *inode);
 extern int ceph_drop_inode(struct inode *inode);