1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
15 #ifndef CEPH_MDS_SERVER_H
16 #define CEPH_MDS_SERVER_H
18 #include <boost/utility/string_view.hpp>
28 class MMDSSlaveRequest
;
36 l_mdss_dispatch_client_request
,
37 l_mdss_dispatch_slave_request
,
38 l_mdss_handle_client_request
,
39 l_mdss_handle_client_session
,
40 l_mdss_handle_slave_request
,
43 l_mdss_req_getfilelock
,
46 l_mdss_req_lookuphash
,
48 l_mdss_req_lookupname
,
49 l_mdss_req_lookupparent
,
50 l_mdss_req_lookupsnap
,
58 l_mdss_req_renamesnap
,
63 l_mdss_req_setdirlayout
,
64 l_mdss_req_setfilelock
,
79 // OSDMap full status, used to generate ENOSPC on some operations
82 // State for while in reconnect
83 MDSInternalContext
*reconnect_done
;
84 int failed_reconnects
;
85 bool reconnect_evicting
; // true if I am waiting for evictions to complete
86 // before proceeding to reconnect_gather_finish
88 friend class MDSContinuation
;
89 friend class ServerContext
;
90 friend class ServerLogContext
;
93 bool terminating_sessions
;
95 explicit Server(MDSRank
*m
);
97 g_ceph_context
->get_perfcounters_collection()->remove(logger
);
99 delete reconnect_done
;
102 void create_logger();
105 void dispatch(Message
*m
);
107 void handle_osd_map();
109 // -- sessions and recovery --
110 utime_t reconnect_start
;
111 set
<client_t
> client_reconnect_gather
; // clients i need a reconnect msg from.
112 bool waiting_for_reconnect(client_t c
) const;
113 void dump_reconnect_status(Formatter
*f
) const;
115 void handle_client_session(class MClientSession
*m
);
116 void _session_logged(Session
*session
, uint64_t state_seq
,
117 bool open
, version_t pv
, interval_set
<inodeno_t
>& inos
,version_t piv
);
118 version_t
prepare_force_open_sessions(map
<client_t
,entity_inst_t
> &cm
,
119 map
<client_t
,pair
<Session
*,uint64_t> >& smap
);
120 void finish_force_open_sessions(const map
<client_t
,pair
<Session
*,uint64_t> >& smap
,
121 bool dec_import
=true);
122 void flush_client_sessions(set
<client_t
>& client_set
, MDSGatherBuilder
& gather
);
123 void finish_flush_session(Session
*session
, version_t seq
);
124 void terminate_sessions();
125 void find_idle_sessions();
126 void kill_session(Session
*session
, Context
*on_safe
);
127 size_t apply_blacklist(const std::set
<entity_addr_t
> &blacklist
);
128 void journal_close_session(Session
*session
, int state
, Context
*on_safe
);
129 void reconnect_clients(MDSInternalContext
*reconnect_done_
);
130 void handle_client_reconnect(class MClientReconnect
*m
);
131 //void process_reconnect_cap(CInode *in, int from, ceph_mds_cap_reconnect& capinfo);
132 void reconnect_gather_finish();
133 void reconnect_tick();
134 void recover_filelocks(CInode
*in
, bufferlist locks
, int64_t client
);
136 void recall_client_state(void);
137 void force_clients_readonly();
140 void handle_client_request(MClientRequest
*m
);
142 void journal_and_reply(MDRequestRef
& mdr
, CInode
*tracei
, CDentry
*tracedn
,
143 LogEvent
*le
, MDSLogContextBase
*fin
);
144 void submit_mdlog_entry(LogEvent
*le
, MDSLogContextBase
*fin
,
145 MDRequestRef
& mdr
, const char *evt
);
146 void dispatch_client_request(MDRequestRef
& mdr
);
147 void early_reply(MDRequestRef
& mdr
, CInode
*tracei
, CDentry
*tracedn
);
148 void respond_to_request(MDRequestRef
& mdr
, int r
= 0);
149 void set_trace_dist(Session
*session
, MClientReply
*reply
, CInode
*in
, CDentry
*dn
,
151 int num_dentries_wanted
,
154 void encode_empty_dirstat(bufferlist
& bl
);
155 void encode_infinite_lease(bufferlist
& bl
);
156 void encode_null_lease(bufferlist
& bl
);
158 void handle_slave_request(MMDSSlaveRequest
*m
);
159 void handle_slave_request_reply(MMDSSlaveRequest
*m
);
160 void dispatch_slave_request(MDRequestRef
& mdr
);
161 void handle_slave_auth_pin(MDRequestRef
& mdr
);
162 void handle_slave_auth_pin_ack(MDRequestRef
& mdr
, MMDSSlaveRequest
*ack
);
165 bool check_fragment_space(MDRequestRef
& mdr
, CDir
*in
);
166 bool check_access(MDRequestRef
& mdr
, CInode
*in
, unsigned mask
);
167 bool _check_access(Session
*session
, CInode
*in
, unsigned mask
, int caller_uid
, int caller_gid
, int setattr_uid
, int setattr_gid
);
168 CDir
*validate_dentry_dir(MDRequestRef
& mdr
, CInode
*diri
, boost::string_view dname
);
169 CDir
*traverse_to_auth_dir(MDRequestRef
& mdr
, vector
<CDentry
*> &trace
, filepath refpath
);
170 CDentry
*prepare_null_dentry(MDRequestRef
& mdr
, CDir
*dir
, boost::string_view dname
, bool okexist
=false);
171 CDentry
*prepare_stray_dentry(MDRequestRef
& mdr
, CInode
*in
);
172 CInode
* prepare_new_inode(MDRequestRef
& mdr
, CDir
*dir
, inodeno_t useino
, unsigned mode
,
173 file_layout_t
*layout
=NULL
);
174 void journal_allocated_inos(MDRequestRef
& mdr
, EMetaBlob
*blob
);
175 void apply_allocated_inos(MDRequestRef
& mdr
, Session
*session
);
177 CInode
* rdlock_path_pin_ref(MDRequestRef
& mdr
, int n
, set
<SimpleLock
*>& rdlocks
, bool want_auth
,
178 bool no_want_auth
=false,
179 file_layout_t
**layout
=NULL
,
180 bool no_lookup
=false);
181 CDentry
* rdlock_path_xlock_dentry(MDRequestRef
& mdr
, int n
,
182 set
<SimpleLock
*>& rdlocks
,
183 set
<SimpleLock
*>& wrlocks
,
184 set
<SimpleLock
*>& xlocks
, bool okexist
,
185 bool mustexist
, bool alwaysxlock
,
186 file_layout_t
**layout
=NULL
);
188 CDir
* try_open_auth_dirfrag(CInode
*diri
, frag_t fg
, MDRequestRef
& mdr
);
191 // requests on existing inodes.
192 void handle_client_getattr(MDRequestRef
& mdr
, bool is_lookup
);
193 void handle_client_lookup_ino(MDRequestRef
& mdr
,
194 bool want_parent
, bool want_dentry
);
195 void _lookup_ino_2(MDRequestRef
& mdr
, int r
);
196 void handle_client_readdir(MDRequestRef
& mdr
);
197 void handle_client_file_setlock(MDRequestRef
& mdr
);
198 void handle_client_file_readlock(MDRequestRef
& mdr
);
200 void handle_client_setattr(MDRequestRef
& mdr
);
201 void handle_client_setlayout(MDRequestRef
& mdr
);
202 void handle_client_setdirlayout(MDRequestRef
& mdr
);
204 int parse_layout_vxattr(string name
, string value
, const OSDMap
& osdmap
,
205 file_layout_t
*layout
, bool validate
=true);
206 int parse_quota_vxattr(string name
, string value
, quota_info_t
*quota
);
207 int check_layout_vxattr(MDRequestRef
& mdr
,
210 file_layout_t
*layout
);
211 void handle_set_vxattr(MDRequestRef
& mdr
, CInode
*cur
,
212 file_layout_t
*dir_layout
,
213 set
<SimpleLock
*> rdlocks
,
214 set
<SimpleLock
*> wrlocks
,
215 set
<SimpleLock
*> xlocks
);
216 void handle_remove_vxattr(MDRequestRef
& mdr
, CInode
*cur
,
217 file_layout_t
*dir_layout
,
218 set
<SimpleLock
*> rdlocks
,
219 set
<SimpleLock
*> wrlocks
,
220 set
<SimpleLock
*> xlocks
);
221 void handle_client_setxattr(MDRequestRef
& mdr
);
222 void handle_client_removexattr(MDRequestRef
& mdr
);
224 void handle_client_fsync(MDRequestRef
& mdr
);
227 void handle_client_open(MDRequestRef
& mdr
);
228 void handle_client_openc(MDRequestRef
& mdr
); // O_CREAT variant.
229 void do_open_truncate(MDRequestRef
& mdr
, int cmode
); // O_TRUNC variant.
232 void handle_client_mknod(MDRequestRef
& mdr
);
233 void handle_client_mkdir(MDRequestRef
& mdr
);
234 void handle_client_symlink(MDRequestRef
& mdr
);
237 void handle_client_link(MDRequestRef
& mdr
);
238 void _link_local(MDRequestRef
& mdr
, CDentry
*dn
, CInode
*targeti
);
239 void _link_local_finish(MDRequestRef
& mdr
,
240 CDentry
*dn
, CInode
*targeti
,
241 version_t
, version_t
);
243 void _link_remote(MDRequestRef
& mdr
, bool inc
, CDentry
*dn
, CInode
*targeti
);
244 void _link_remote_finish(MDRequestRef
& mdr
, bool inc
, CDentry
*dn
, CInode
*targeti
,
247 void handle_slave_link_prep(MDRequestRef
& mdr
);
248 void _logged_slave_link(MDRequestRef
& mdr
, CInode
*targeti
);
249 void _commit_slave_link(MDRequestRef
& mdr
, int r
, CInode
*targeti
);
250 void _committed_slave(MDRequestRef
& mdr
); // use for rename, too
251 void handle_slave_link_prep_ack(MDRequestRef
& mdr
, MMDSSlaveRequest
*m
);
252 void do_link_rollback(bufferlist
&rbl
, mds_rank_t master
, MDRequestRef
& mdr
);
253 void _link_rollback_finish(MutationRef
& mut
, MDRequestRef
& mdr
);
256 void handle_client_unlink(MDRequestRef
& mdr
);
257 bool _dir_is_nonempty_unlocked(MDRequestRef
& mdr
, CInode
*rmdiri
);
258 bool _dir_is_nonempty(MDRequestRef
& mdr
, CInode
*rmdiri
);
259 void _unlink_local(MDRequestRef
& mdr
, CDentry
*dn
, CDentry
*straydn
);
260 void _unlink_local_finish(MDRequestRef
& mdr
,
261 CDentry
*dn
, CDentry
*straydn
,
263 bool _rmdir_prepare_witness(MDRequestRef
& mdr
, mds_rank_t who
, vector
<CDentry
*>& trace
, CDentry
*straydn
);
264 void handle_slave_rmdir_prep(MDRequestRef
& mdr
);
265 void _logged_slave_rmdir(MDRequestRef
& mdr
, CDentry
*srcdn
, CDentry
*straydn
);
266 void _commit_slave_rmdir(MDRequestRef
& mdr
, int r
, CDentry
*straydn
);
267 void handle_slave_rmdir_prep_ack(MDRequestRef
& mdr
, MMDSSlaveRequest
*ack
);
268 void do_rmdir_rollback(bufferlist
&rbl
, mds_rank_t master
, MDRequestRef
& mdr
);
269 void _rmdir_rollback_finish(MDRequestRef
& mdr
, metareqid_t reqid
, CDentry
*dn
, CDentry
*straydn
);
272 void handle_client_rename(MDRequestRef
& mdr
);
273 void _rename_finish(MDRequestRef
& mdr
,
274 CDentry
*srcdn
, CDentry
*destdn
, CDentry
*straydn
);
276 void handle_client_lssnap(MDRequestRef
& mdr
);
277 void handle_client_mksnap(MDRequestRef
& mdr
);
278 void _mksnap_finish(MDRequestRef
& mdr
, CInode
*diri
, SnapInfo
&info
);
279 void handle_client_rmsnap(MDRequestRef
& mdr
);
280 void _rmsnap_finish(MDRequestRef
& mdr
, CInode
*diri
, snapid_t snapid
);
281 void handle_client_renamesnap(MDRequestRef
& mdr
);
282 void _renamesnap_finish(MDRequestRef
& mdr
, CInode
*diri
, snapid_t snapid
);
286 bool _rename_prepare_witness(MDRequestRef
& mdr
, mds_rank_t who
, set
<mds_rank_t
> &witnesse
,
287 vector
<CDentry
*>& srctrace
, vector
<CDentry
*>& dsttrace
, CDentry
*straydn
);
288 version_t
_rename_prepare_import(MDRequestRef
& mdr
, CDentry
*srcdn
, bufferlist
*client_map_bl
);
289 bool _need_force_journal(CInode
*diri
, bool empty
);
290 void _rename_prepare(MDRequestRef
& mdr
,
291 EMetaBlob
*metablob
, bufferlist
*client_map_bl
,
292 CDentry
*srcdn
, CDentry
*destdn
, CDentry
*straydn
);
293 /* set not_journaling=true if you're going to discard the results --
294 * this bypasses the asserts to make sure we're journaling the right
295 * things on the right nodes */
296 void _rename_apply(MDRequestRef
& mdr
, CDentry
*srcdn
, CDentry
*destdn
, CDentry
*straydn
);
299 void handle_slave_rename_prep(MDRequestRef
& mdr
);
300 void handle_slave_rename_prep_ack(MDRequestRef
& mdr
, MMDSSlaveRequest
*m
);
301 void handle_slave_rename_notify_ack(MDRequestRef
& mdr
, MMDSSlaveRequest
*m
);
302 void _slave_rename_sessions_flushed(MDRequestRef
& mdr
);
303 void _logged_slave_rename(MDRequestRef
& mdr
, CDentry
*srcdn
, CDentry
*destdn
, CDentry
*straydn
);
304 void _commit_slave_rename(MDRequestRef
& mdr
, int r
, CDentry
*srcdn
, CDentry
*destdn
, CDentry
*straydn
);
305 void do_rename_rollback(bufferlist
&rbl
, mds_rank_t master
, MDRequestRef
& mdr
, bool finish_mdr
=false);
306 void _rename_rollback_finish(MutationRef
& mut
, MDRequestRef
& mdr
, CDentry
*srcdn
, version_t srcdnpv
,
307 CDentry
*destdn
, CDentry
*staydn
, bool finish_mdr
);
310 void reply_client_request(MDRequestRef
& mdr
, MClientReply
*reply
);