245 struct ceph_mds_request {  struct
246 	u64 r_tid;                   /* transaction id */
247 	struct rb_node r_node;
248 	struct ceph_mds_client *r_mdsc;
250 	struct kref       r_kref;
251 	int r_op;                    /* mds op code */
276 	union ceph_mds_request_args r_args;  argument
277 	int r_fmode;        /* file mode, if expecting cap */
278 	kuid_t r_uid;
279 	kgid_t r_gid;
280 	int r_request_release_offset;
281 	struct timespec64 r_stamp;
284 	int r_direct_mode;
285 	u32 r_direct_hash;      /* choose dir frag based on this dentry hash */
288 	struct ceph_pagelist *r_pagelist;
291 	int r_inode_drop, r_inode_unless;
292 	int r_dentry_drop, r_dentry_unless;
293 	int r_old_dentry_drop, r_old_dentry_unless;
294 	struct inode *r_old_inode;
295 	int r_old_inode_drop, r_old_inode_unless;
297 	struct ceph_msg  *r_request;  /* original request */
298 	struct ceph_msg  *r_reply;
299 	struct ceph_mds_reply_info_parsed r_reply_info;
300 	int r_err;
303 	struct page *r_locked_page;
304 	int r_dir_caps;
305 	int r_num_caps;
306 	u32               r_readdir_offset;
308 	unsigned long r_timeout;  /* optional.  jiffies, 0 is "wait forever" */
309 	unsigned long r_started;  /* start time to measure timeout against */
333 	ceph_mds_request_callback_t r_callback;  argument
334 	ceph_mds_request_wait_callback_t r_wait_for_completion;  argument
335 	struct list_head  r_unsafe_item;  /* per-session unsafe list item */
337 	long long	  r_dir_release_cnt;
338 	long long	  r_dir_ordered_cnt;
339 	int		  r_readdir_cache_idx;
341 	struct ceph_cap_reservation r_caps_reservation;