211 struct ceph_mds_request {  struct
212 	u64 r_tid;                   /* transaction id */
213 	struct rb_node r_node;
214 	struct ceph_mds_client *r_mdsc;
216 	int r_op;                    /* mds op code */
240 	union ceph_mds_request_args r_args;  argument
241 	int r_fmode;        /* file mode, if expecting cap */
242 	kuid_t r_uid;
243 	kgid_t r_gid;
244 	struct timespec64 r_stamp;
247 	int r_direct_mode;
248 	u32 r_direct_hash;      /* choose dir frag based on this dentry hash */
251 	struct ceph_pagelist *r_pagelist;
254 	int r_inode_drop, r_inode_unless;
255 	int r_dentry_drop, r_dentry_unless;
256 	int r_old_dentry_drop, r_old_dentry_unless;
257 	struct inode *r_old_inode;
258 	int r_old_inode_drop, r_old_inode_unless;
260 	struct ceph_msg  *r_request;  /* original request */
261 	int r_request_release_offset;
262 	struct ceph_msg  *r_reply;
263 	struct ceph_mds_reply_info_parsed r_reply_info;
264 	struct page *r_locked_page;
265 	int r_err;
290 	ceph_mds_request_callback_t r_callback;  argument
291 	ceph_mds_request_wait_callback_t r_wait_for_completion;  argument
292 	struct list_head  r_unsafe_item;  /* per-session unsafe list item */
294 	long long	  r_dir_release_cnt;
295 	long long	  r_dir_ordered_cnt;
296 	int		  r_readdir_cache_idx;
297 	u32               r_readdir_offset;
299 	struct ceph_cap_reservation r_caps_reservation;
300 	int r_num_caps;