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23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 /** \defgroup obd_import PtlRPC import definitions
33 * Imports are client-side representation of remote obd target.
41 /** \defgroup export export
46 #include <lustre_handles.h>
47 #include <lustre/lustre_idl.h>
51 * Adaptive Timeout stuff
55 #define D_ADAPTTO D_OTHER
56 #define AT_BINS 4 /* "bin" means "N seconds of history" */
57 #define AT_FLG_NOHIST 0x1 /* use last reported value only */
59 struct adaptive_timeout {
60 time64_t at_binstart; /* bin start time */
61 unsigned int at_hist[AT_BINS]; /* timeout history bins */
62 unsigned int at_flags;
63 unsigned int at_current; /* current timeout value */
64 unsigned int at_worst_ever; /* worst-ever timeout value */
65 time64_t at_worst_time; /* worst-ever timeout timestamp */
69 enum lustre_at_flags {
74 struct ptlrpc_at_array {
75 struct list_head *paa_reqs_array; /** array to hold requests */
76 __u32 paa_size; /** the size of array */
77 __u32 paa_count; /** the total count of reqs */
78 time_t paa_deadline; /** the earliest deadline of reqs */
79 __u32 *paa_reqs_count; /** the count of reqs in each entry */
82 #define IMP_AT_MAX_PORTALS 8
84 int iat_portal[IMP_AT_MAX_PORTALS];
85 struct adaptive_timeout iat_net_latency;
86 struct adaptive_timeout iat_service_estimate[IMP_AT_MAX_PORTALS];
92 /** Possible import states */
93 enum lustre_imp_state {
94 LUSTRE_IMP_CLOSED = 1,
96 LUSTRE_IMP_DISCON = 3,
97 LUSTRE_IMP_CONNECTING = 4,
98 LUSTRE_IMP_REPLAY = 5,
99 LUSTRE_IMP_REPLAY_LOCKS = 6,
100 LUSTRE_IMP_REPLAY_WAIT = 7,
101 LUSTRE_IMP_RECOVER = 8,
103 LUSTRE_IMP_EVICTED = 10,
106 /** Returns test string representation of numeric import state \a state */
107 static inline char * ptlrpc_import_state_name(enum lustre_imp_state state)
109 static char* import_state_names[] = {
110 "<UNKNOWN>", "CLOSED", "NEW", "DISCONN",
111 "CONNECTING", "REPLAY", "REPLAY_LOCKS", "REPLAY_WAIT",
112 "RECOVER", "FULL", "EVICTED",
115 LASSERT (state <= LUSTRE_IMP_EVICTED);
116 return import_state_names[state];
120 * List of import event types
122 enum obd_import_event {
123 IMP_EVENT_DISCON = 0x808001,
124 IMP_EVENT_INACTIVE = 0x808002,
125 IMP_EVENT_INVALIDATE = 0x808003,
126 IMP_EVENT_ACTIVE = 0x808004,
127 IMP_EVENT_OCD = 0x808005,
128 IMP_EVENT_DEACTIVATE = 0x808006,
129 IMP_EVENT_ACTIVATE = 0x808007,
133 * Definition of import connection structure
135 struct obd_import_conn {
136 /** Item for linking connections together */
137 struct list_head oic_item;
138 /** Pointer to actual PortalRPC connection */
139 struct ptlrpc_connection *oic_conn;
140 /** uuid of remote side */
141 struct obd_uuid oic_uuid;
143 * Time (64 bit jiffies) of last connection attempt on this connection
145 __u64 oic_last_attempt;
149 #define IMP_STATE_HIST_LEN 16
150 struct import_state_hist {
151 enum lustre_imp_state ish_state;
156 * Defintion of PortalRPC import structure.
157 * Imports are representing client-side view to remote target.
160 /** Local handle (== id) for this import. */
161 struct portals_handle imp_handle;
162 /** Reference counter */
163 atomic_t imp_refcount;
164 struct lustre_handle imp_dlm_handle; /* client's ldlm export */
165 /** Currently active connection */
166 struct ptlrpc_connection *imp_connection;
167 /** PortalRPC client structure for this import */
168 struct ptlrpc_client *imp_client;
169 /** List element for linking into pinger chain */
170 struct list_head imp_pinger_chain;
171 /** List element for linking into chain for destruction */
172 struct list_head imp_zombie_chain;
175 * Lists of requests that are retained for replay, waiting for a reply,
176 * or waiting for recovery to complete, respectively.
179 struct list_head imp_replay_list;
180 struct list_head imp_sending_list;
181 struct list_head imp_delayed_list;
185 * List of requests that are retained for committed open replay. Once
186 * open is committed, open replay request will be moved from the
187 * imp_replay_list into the imp_committed_list.
188 * The imp_replay_cursor is for accelerating searching during replay.
191 struct list_head imp_committed_list;
192 struct list_head *imp_replay_cursor;
195 /** List of not replied requests */
196 struct list_head imp_unreplied_list;
197 /** Known maximal replied XID */
198 __u64 imp_known_replied_xid;
200 /** obd device for this import */
201 struct obd_device *imp_obd;
204 * some seciruty-related fields
207 struct ptlrpc_sec *imp_sec;
208 struct mutex imp_sec_mutex;
209 cfs_time_t imp_sec_expire;
210 pid_t imp_sec_refpid;
213 /** Wait queue for those who need to wait for recovery completion */
214 wait_queue_head_t imp_recovery_waitq;
216 /** Number of requests currently in-flight */
217 atomic_t imp_inflight;
218 /** Number of requests currently unregistering */
219 atomic_t imp_unregistering;
220 /** Number of replay requests inflight */
221 atomic_t imp_replay_inflight;
222 /** Number of currently happening import invalidations */
223 atomic_t imp_inval_count;
224 /** Numbner of request timeouts */
225 atomic_t imp_timeouts;
226 /** Current import state */
227 enum lustre_imp_state imp_state;
228 /** Last replay state */
229 enum lustre_imp_state imp_replay_state;
230 /** History of import states */
231 struct import_state_hist imp_state_hist[IMP_STATE_HIST_LEN];
232 int imp_state_hist_idx;
233 /** Current import generation. Incremented on every reconnect */
235 /** Incremented every time we send reconnection request */
238 * \see ptlrpc_free_committed remembers imp_generation value here
239 * after a check to save on unnecessary replay list iterations
241 int imp_last_generation_checked;
242 /** Last tranno we replayed */
243 __u64 imp_last_replay_transno;
244 /** Last transno committed on remote side */
245 __u64 imp_peer_committed_transno;
247 * \see ptlrpc_free_committed remembers last_transno since its last
248 * check here and if last_transno did not change since last run of
249 * ptlrpc_free_committed and import generation is the same, we can
250 * skip looking for requests to remove from replay list as optimisation
252 __u64 imp_last_transno_checked;
254 * Remote export handle. This is how remote side knows what export
255 * we are talking to. Filled from response to connect request
257 struct lustre_handle imp_remote_handle;
258 /** When to perform next ping. time in jiffies. */
259 cfs_time_t imp_next_ping;
260 /** When we last successfully connected. time in 64bit jiffies */
261 __u64 imp_last_success_conn;
263 /** List of all possible connection for import. */
264 struct list_head imp_conn_list;
266 * Current connection. \a imp_connection is imp_conn_current->oic_conn
268 struct obd_import_conn *imp_conn_current;
270 /** Protects flags, level, generation, conn_cnt, *_list */
274 unsigned long imp_no_timeout:1, /* timeouts are disabled */
275 imp_invalid:1, /* evicted */
276 /* administratively disabled */
278 /* try to recover the import */
280 /* don't run recovery (timeout instead) */
282 /* use 1/2 timeout on MDS' OSCs */
283 imp_server_timeout:1,
284 /* VBR: imp in delayed recovery */
285 imp_delayed_recovery:1,
286 /* VBR: if gap was found then no lock replays
288 imp_no_lock_replay:1,
289 /* recovery by versions was failed */
291 /* force an immidiate ping */
293 /* force a scheduled ping */
294 imp_force_next_verify:1,
297 /* resend for replay */
299 /* disable normal recovery, for test only. */
300 imp_no_pinger_recover:1,
301 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
302 /* need IR MNE swab */
305 /* import must be reconnected instead of
306 * chouse new connection */
307 imp_force_reconnect:1,
308 /* import has tried to connect with server */
310 /* connected but not FULL yet */
312 __u32 imp_connect_op;
313 struct obd_connect_data imp_connect_data;
314 __u64 imp_connect_flags_orig;
315 __u64 imp_connect_flags2_orig;
316 int imp_connect_error;
319 /* adjusted based on server capability */
320 __u32 imp_msghdr_flags;
322 /* adaptive timeout data */
323 struct imp_at imp_at;
324 time_t imp_last_reply_time; /* for health check */
328 static inline unsigned int at_est2timeout(unsigned int val)
330 /* add an arbitrary minimum: 125% +5 sec */
331 return (val + (val >> 2) + 5);
334 static inline unsigned int at_timeout2est(unsigned int val)
336 /* restore estimate value from timeout: e=4/5(t-5) */
338 return (max((val << 2) / 5, 5U) - 4);
341 static inline void at_reset_nolock(struct adaptive_timeout *at, int val)
343 at->at_current = val;
344 at->at_worst_ever = val;
345 at->at_worst_time = ktime_get_real_seconds();
348 static inline void at_reset(struct adaptive_timeout *at, int val)
350 spin_lock(&at->at_lock);
351 at_reset_nolock(at, val);
352 spin_unlock(&at->at_lock);
355 static inline void at_init(struct adaptive_timeout *at, int val, int flags) {
356 memset(at, 0, sizeof(*at));
357 spin_lock_init(&at->at_lock);
358 at->at_flags = flags;
362 static inline void at_reinit(struct adaptive_timeout *at, int val, int flags)
364 spin_lock(&at->at_lock);
366 memset(at->at_hist, 0, sizeof(at->at_hist));
367 at->at_flags = flags;
368 at_reset_nolock(at, val);
369 spin_unlock(&at->at_lock);
372 extern unsigned int at_min;
373 static inline int at_get(struct adaptive_timeout *at) {
374 return (at->at_current > at_min) ? at->at_current : at_min;
376 int at_measured(struct adaptive_timeout *at, unsigned int val);
377 int import_at_get_index(struct obd_import *imp, int portal);
378 extern unsigned int at_max;
379 #define AT_OFF (at_max == 0)
383 extern struct obd_import *class_exp2cliimp(struct obd_export *);
384 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
388 #endif /* __IMPORT_H */