1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #ifndef __OBD_H
38 #define __OBD_H
39
40 #include "linux/obd.h"
41
42 #define IOC_OSC_TYPE 'h'
43 #define IOC_OSC_MIN_NR 20
44 #define IOC_OSC_SET_ACTIVE _IOWR(IOC_OSC_TYPE, 21, struct obd_device *)
45 #define IOC_OSC_MAX_NR 50
46
47 #define IOC_MDC_TYPE 'i'
48 #define IOC_MDC_MIN_NR 20
49 #define IOC_MDC_MAX_NR 50
50
51 #include "lustre/lustre_idl.h"
52 #include "lustre_lib.h"
53 #include "lu_ref.h"
54 #include "lustre_export.h"
55 #include "lustre_fid.h"
56 #include "lustre_fld.h"
57 #include "lustre_capa.h"
58
59 #define MAX_OBD_DEVICES 8192
60
61 struct osc_async_rc {
62 int ar_rc;
63 int ar_force_sync;
64 __u64 ar_min_xid;
65 };
66
67 struct lov_oinfo { /* per-stripe data structure */
68 struct ost_id loi_oi; /* object ID/Sequence on the target OST */
69 int loi_ost_idx; /* OST stripe index in lov_tgt_desc->tgts */
70 int loi_ost_gen; /* generation of this loi_ost_idx */
71
72 unsigned long loi_kms_valid:1;
73 __u64 loi_kms; /* known minimum size */
74 struct ost_lvb loi_lvb;
75 struct osc_async_rc loi_ar;
76 };
77
loi_kms_set(struct lov_oinfo * oinfo,__u64 kms)78 static inline void loi_kms_set(struct lov_oinfo *oinfo, __u64 kms)
79 {
80 oinfo->loi_kms = kms;
81 oinfo->loi_kms_valid = 1;
82 }
83
loi_init(struct lov_oinfo * loi)84 static inline void loi_init(struct lov_oinfo *loi)
85 {
86 }
87
88 struct lov_stripe_md {
89 atomic_t lsm_refc;
90 spinlock_t lsm_lock;
91 pid_t lsm_lock_owner; /* debugging */
92
93 /* maximum possible file size, might change as OSTs status changes,
94 * e.g. disconnected, deactivated */
95 __u64 lsm_maxbytes;
96 struct {
97 /* Public members. */
98 struct ost_id lw_object_oi; /* lov object id/seq */
99
100 /* LOV-private members start here -- only for use in lov/. */
101 __u32 lw_magic;
102 __u32 lw_stripe_size; /* size of the stripe */
103 __u32 lw_pattern; /* striping pattern (RAID0, RAID1) */
104 __u16 lw_stripe_count; /* number of objects being striped over */
105 __u16 lw_layout_gen; /* generation of the layout */
106 char lw_pool_name[LOV_MAXPOOLNAME]; /* pool name */
107 } lsm_wire;
108
109 struct lov_oinfo *lsm_oinfo[0];
110 };
111
112 #define lsm_oi lsm_wire.lw_object_oi
113 #define lsm_magic lsm_wire.lw_magic
114 #define lsm_layout_gen lsm_wire.lw_layout_gen
115 #define lsm_stripe_size lsm_wire.lw_stripe_size
116 #define lsm_pattern lsm_wire.lw_pattern
117 #define lsm_stripe_count lsm_wire.lw_stripe_count
118 #define lsm_pool_name lsm_wire.lw_pool_name
119
lsm_is_released(struct lov_stripe_md * lsm)120 static inline bool lsm_is_released(struct lov_stripe_md *lsm)
121 {
122 return !!(lsm->lsm_pattern & LOV_PATTERN_F_RELEASED);
123 }
124
lsm_has_objects(struct lov_stripe_md * lsm)125 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
126 {
127 if (lsm == NULL)
128 return false;
129 if (lsm_is_released(lsm))
130 return false;
131 return true;
132 }
133
lov_stripe_md_size(unsigned int stripe_count)134 static inline int lov_stripe_md_size(unsigned int stripe_count)
135 {
136 struct lov_stripe_md lsm;
137
138 return sizeof(lsm) + stripe_count * sizeof(lsm.lsm_oinfo[0]);
139 }
140
141 struct obd_info;
142
143 typedef int (*obd_enqueue_update_f)(void *cookie, int rc);
144
145 /* obd info for a particular level (lov, osc). */
146 struct obd_info {
147 /* Lock policy. It keeps an extent which is specific for a particular
148 * OSC. (e.g. lov_prep_enqueue_set initialises extent of the policy,
149 * and osc_enqueue passes it into ldlm_lock_match & ldlm_cli_enqueue. */
150 ldlm_policy_data_t oi_policy;
151 /* Flags used for set request specific flags:
152 - while lock handling, the flags obtained on the enqueue
153 request are set here.
154 - while stats, the flags used for control delay/resend.
155 - while setattr, the flags used for distinguish punch operation
156 */
157 __u64 oi_flags;
158 /* Lock handle specific for every OSC lock. */
159 struct lustre_handle *oi_lockh;
160 /* lsm data specific for every OSC. */
161 struct lov_stripe_md *oi_md;
162 /* obdo data specific for every OSC, if needed at all. */
163 struct obdo *oi_oa;
164 /* statfs data specific for every OSC, if needed at all. */
165 struct obd_statfs *oi_osfs;
166 /* An update callback which is called to update some data on upper
167 * level. E.g. it is used for update lsm->lsm_oinfo at every received
168 * request in osc level for enqueue requests. It is also possible to
169 * update some caller data from LOV layer if needed. */
170 obd_enqueue_update_f oi_cb_up;
171 /* oss capability, its type is obd_capa in client to avoid copy.
172 * in contrary its type is lustre_capa in OSS. */
173 void *oi_capa;
174 /* transfer jobid from ost_sync() to filter_sync()... */
175 char *oi_jobid;
176 };
177
178 /* compare all relevant fields. */
lov_stripe_md_cmp(struct lov_stripe_md * m1,struct lov_stripe_md * m2)179 static inline int lov_stripe_md_cmp(struct lov_stripe_md *m1,
180 struct lov_stripe_md *m2)
181 {
182 /*
183 * ->lsm_wire contains padding, but it should be zeroed out during
184 * allocation.
185 */
186 return memcmp(&m1->lsm_wire, &m2->lsm_wire, sizeof(m1->lsm_wire));
187 }
188
lov_lum_lsm_cmp(struct lov_user_md * lum,struct lov_stripe_md * lsm)189 static inline int lov_lum_lsm_cmp(struct lov_user_md *lum,
190 struct lov_stripe_md *lsm)
191 {
192 if (lsm->lsm_magic != lum->lmm_magic)
193 return 1;
194 if ((lsm->lsm_stripe_count != 0) && (lum->lmm_stripe_count != 0) &&
195 (lsm->lsm_stripe_count != lum->lmm_stripe_count))
196 return 2;
197 if ((lsm->lsm_stripe_size != 0) && (lum->lmm_stripe_size != 0) &&
198 (lsm->lsm_stripe_size != lum->lmm_stripe_size))
199 return 3;
200 if ((lsm->lsm_pattern != 0) && (lum->lmm_pattern != 0) &&
201 (lsm->lsm_pattern != lum->lmm_pattern))
202 return 4;
203 if ((lsm->lsm_magic == LOV_MAGIC_V3) &&
204 (strncmp(lsm->lsm_pool_name,
205 ((struct lov_user_md_v3 *)lum)->lmm_pool_name,
206 LOV_MAXPOOLNAME) != 0))
207 return 5;
208 return 0;
209 }
210
lov_lum_swab_if_needed(struct lov_user_md_v3 * lumv3,int * lmm_magic,struct lov_user_md * lum)211 static inline int lov_lum_swab_if_needed(struct lov_user_md_v3 *lumv3,
212 int *lmm_magic,
213 struct lov_user_md *lum)
214 {
215 if (lum && copy_from_user(lumv3, lum, sizeof(struct lov_user_md_v1)))
216 return -EFAULT;
217
218 *lmm_magic = lumv3->lmm_magic;
219
220 if (*lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
221 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lumv3);
222 *lmm_magic = LOV_USER_MAGIC_V1;
223 } else if (*lmm_magic == LOV_USER_MAGIC_V3) {
224 if (lum && copy_from_user(lumv3, lum, sizeof(*lumv3)))
225 return -EFAULT;
226 } else if (*lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
227 if (lum && copy_from_user(lumv3, lum, sizeof(*lumv3)))
228 return -EFAULT;
229 lustre_swab_lov_user_md_v3(lumv3);
230 *lmm_magic = LOV_USER_MAGIC_V3;
231 } else if (*lmm_magic != LOV_USER_MAGIC_V1) {
232 CDEBUG(D_IOCTL,
233 "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
234 *lmm_magic, LOV_USER_MAGIC_V1, LOV_USER_MAGIC_V3);
235 return -EINVAL;
236 }
237 return 0;
238 }
239
240 void lov_stripe_lock(struct lov_stripe_md *md);
241 void lov_stripe_unlock(struct lov_stripe_md *md);
242
243 struct obd_type {
244 struct list_head typ_chain;
245 struct obd_ops *typ_dt_ops;
246 struct md_ops *typ_md_ops;
247 struct proc_dir_entry *typ_procroot;
248 char *typ_name;
249 int typ_refcnt;
250 struct lu_device_type *typ_lu;
251 spinlock_t obd_type_lock;
252 };
253
254 struct brw_page {
255 u64 off;
256 struct page *pg;
257 int count;
258 u32 flag;
259 };
260
261 /* llog contexts */
262 enum llog_ctxt_id {
263 LLOG_CONFIG_ORIG_CTXT = 0,
264 LLOG_CONFIG_REPL_CTXT,
265 LLOG_MDS_OST_ORIG_CTXT,
266 LLOG_MDS_OST_REPL_CTXT,
267 LLOG_SIZE_ORIG_CTXT,
268 LLOG_SIZE_REPL_CTXT,
269 LLOG_RD1_ORIG_CTXT,
270 LLOG_RD1_REPL_CTXT,
271 LLOG_TEST_ORIG_CTXT,
272 LLOG_TEST_REPL_CTXT,
273 LLOG_LOVEA_ORIG_CTXT,
274 LLOG_LOVEA_REPL_CTXT,
275 LLOG_CHANGELOG_ORIG_CTXT, /**< changelog generation on mdd */
276 LLOG_CHANGELOG_REPL_CTXT, /**< changelog access on clients */
277 LLOG_CHANGELOG_USER_ORIG_CTXT, /**< for multiple changelog consumers */
278 LLOG_AGENT_ORIG_CTXT, /**< agent requests generation on cdt */
279 LLOG_MAX_CTXTS
280 };
281
282 struct timeout_item {
283 enum timeout_event ti_event;
284 unsigned long ti_timeout;
285 timeout_cb_t ti_cb;
286 void *ti_cb_data;
287 struct list_head ti_obd_list;
288 struct list_head ti_chain;
289 };
290
291 #define OSC_MAX_RIF_DEFAULT 8
292 #define MDS_OSC_MAX_RIF_DEFAULT 50
293 #define OSC_MAX_RIF_MAX 256
294 #define OSC_MAX_DIRTY_DEFAULT (OSC_MAX_RIF_DEFAULT * 4)
295 #define OSC_MAX_DIRTY_MB_MAX 2048 /* arbitrary, but < MAX_LONG bytes */
296 #define OSC_DEFAULT_RESENDS 10
297
298 /* possible values for fo_sync_lock_cancel */
299 enum {
300 NEVER_SYNC_ON_CANCEL = 0,
301 BLOCKING_SYNC_ON_CANCEL = 1,
302 ALWAYS_SYNC_ON_CANCEL = 2,
303 NUM_SYNC_ON_CANCEL_STATES
304 };
305
306 #define MDC_MAX_RIF_DEFAULT 8
307 #define MDC_MAX_RIF_MAX 512
308
309 struct mdc_rpc_lock;
310 struct obd_import;
311 struct client_obd {
312 struct rw_semaphore cl_sem;
313 struct obd_uuid cl_target_uuid;
314 struct obd_import *cl_import; /* ptlrpc connection state */
315 int cl_conn_count;
316 /* max_mds_easize is purely a performance thing so we don't have to
317 * call obd_size_diskmd() all the time. */
318 int cl_default_mds_easize;
319 int cl_max_mds_easize;
320 int cl_default_mds_cookiesize;
321 int cl_max_mds_cookiesize;
322
323 enum lustre_sec_part cl_sp_me;
324 enum lustre_sec_part cl_sp_to;
325 struct sptlrpc_flavor cl_flvr_mgc; /* fixed flavor of mgc->mgs */
326
327 /* the grant values are protected by loi_list_lock below */
328 long cl_dirty; /* all _dirty_ in bytes */
329 long cl_dirty_max; /* allowed w/o rpc */
330 long cl_dirty_transit; /* dirty synchronous */
331 long cl_avail_grant; /* bytes of credit for ost */
332 long cl_lost_grant; /* lost credits (trunc) */
333
334 /* since we allocate grant by blocks, we don't know how many grant will
335 * be used to add a page into cache. As a solution, we reserve maximum
336 * grant before trying to dirty a page and unreserve the rest.
337 * See osc_{reserve|unreserve}_grant for details. */
338 long cl_reserved_grant;
339 struct list_head cl_cache_waiters; /* waiting for cache/grant */
340 unsigned long cl_next_shrink_grant; /* jiffies */
341 struct list_head cl_grant_shrink_list; /* Timeout event list */
342 int cl_grant_shrink_interval; /* seconds */
343
344 /* A chunk is an optimal size used by osc_extent to determine
345 * the extent size. A chunk is max(PAGE_CACHE_SIZE, OST block size) */
346 int cl_chunkbits;
347 int cl_chunk;
348 int cl_extent_tax; /* extent overhead, by bytes */
349
350 /* keep track of objects that have lois that contain pages which
351 * have been queued for async brw. this lock also protects the
352 * lists of osc_client_pages that hang off of the loi */
353 /*
354 * ->cl_loi_list_lock protects consistency of
355 * ->cl_loi_{ready,read,write}_list. ->ap_make_ready() and
356 * ->ap_completion() call-backs are executed under this lock. As we
357 * cannot guarantee that these call-backs never block on all platforms
358 * (as a matter of fact they do block on Mac OS X), type of
359 * ->cl_loi_list_lock is platform dependent: it's a spin-lock on Linux
360 * and blocking mutex on Mac OS X. (Alternative is to make this lock
361 * blocking everywhere, but we don't want to slow down fast-path of
362 * our main platform.)
363 *
364 * Exact type of ->cl_loi_list_lock is defined in arch/obd.h together
365 * with client_obd_list_{un,}lock() and
366 * client_obd_list_lock_{init,done}() functions.
367 *
368 * NB by Jinshan: though field names are still _loi_, but actually
369 * osc_object{}s are in the list.
370 */
371 client_obd_lock_t cl_loi_list_lock;
372 struct list_head cl_loi_ready_list;
373 struct list_head cl_loi_hp_ready_list;
374 struct list_head cl_loi_write_list;
375 struct list_head cl_loi_read_list;
376 int cl_r_in_flight;
377 int cl_w_in_flight;
378 /* just a sum of the loi/lop pending numbers to be exported by /proc */
379 atomic_t cl_pending_w_pages;
380 atomic_t cl_pending_r_pages;
381 __u32 cl_max_pages_per_rpc;
382 int cl_max_rpcs_in_flight;
383 struct obd_histogram cl_read_rpc_hist;
384 struct obd_histogram cl_write_rpc_hist;
385 struct obd_histogram cl_read_page_hist;
386 struct obd_histogram cl_write_page_hist;
387 struct obd_histogram cl_read_offset_hist;
388 struct obd_histogram cl_write_offset_hist;
389
390 /* lru for osc caching pages */
391 struct cl_client_cache *cl_cache;
392 struct list_head cl_lru_osc; /* member of cl_cache->ccc_lru */
393 atomic_t *cl_lru_left;
394 atomic_t cl_lru_busy;
395 atomic_t cl_lru_shrinkers;
396 atomic_t cl_lru_in_list;
397 struct list_head cl_lru_list; /* lru page list */
398 client_obd_lock_t cl_lru_list_lock; /* page list protector */
399
400 /* number of in flight destroy rpcs is limited to max_rpcs_in_flight */
401 atomic_t cl_destroy_in_flight;
402 wait_queue_head_t cl_destroy_waitq;
403
404 struct mdc_rpc_lock *cl_rpc_lock;
405 struct mdc_rpc_lock *cl_close_lock;
406
407 /* mgc datastruct */
408 struct mutex cl_mgc_mutex;
409 struct local_oid_storage *cl_mgc_los;
410 struct dt_object *cl_mgc_configs_dir;
411 atomic_t cl_mgc_refcount;
412 struct obd_export *cl_mgc_mgsexp;
413
414 /* checksumming for data sent over the network */
415 unsigned int cl_checksum:1; /* 0 = disabled, 1 = enabled */
416 /* supported checksum types that are worked out at connect time */
417 __u32 cl_supp_cksum_types;
418 /* checksum algorithm to be used */
419 cksum_type_t cl_cksum_type;
420
421 /* also protected by the poorly named _loi_list_lock lock above */
422 struct osc_async_rc cl_ar;
423
424 /* used by quotacheck when the servers are older than 2.4 */
425 int cl_qchk_stat; /* quotacheck stat of the peer */
426 #define CL_NOT_QUOTACHECKED 1 /* client->cl_qchk_stat init value */
427 #if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 7, 50, 0)
428 #warning "please consider removing quotacheck compatibility code"
429 #endif
430
431 /* sequence manager */
432 struct lu_client_seq *cl_seq;
433
434 atomic_t cl_resends; /* resend count */
435
436 /* ptlrpc work for writeback in ptlrpcd context */
437 void *cl_writeback_work;
438 /* hash tables for osc_quota_info */
439 struct cfs_hash *cl_quota_hash[MAXQUOTAS];
440 };
441 #define obd2cli_tgt(obd) ((char *)(obd)->u.cli.cl_target_uuid.uuid)
442
443 struct obd_id_info {
444 __u32 idx;
445 u64 *data;
446 };
447
448 struct echo_client_obd {
449 struct obd_export *ec_exp; /* the local connection to osc/lov */
450 spinlock_t ec_lock;
451 struct list_head ec_objects;
452 struct list_head ec_locks;
453 int ec_nstripes;
454 __u64 ec_unique;
455 };
456
457 struct lov_qos_oss {
458 struct obd_uuid lqo_uuid; /* ptlrpc's c_remote_uuid */
459 struct list_head lqo_oss_list; /* link to lov_qos */
460 __u64 lqo_bavail; /* total bytes avail on OSS */
461 __u64 lqo_penalty; /* current penalty */
462 __u64 lqo_penalty_per_obj;/* penalty decrease every obj*/
463 time_t lqo_used; /* last used time, seconds */
464 __u32 lqo_ost_count; /* number of osts on this oss */
465 };
466
467 struct ltd_qos {
468 struct lov_qos_oss *ltq_oss; /* oss info */
469 __u64 ltq_penalty; /* current penalty */
470 __u64 ltq_penalty_per_obj; /* penalty decrease every obj*/
471 __u64 ltq_weight; /* net weighting */
472 time_t ltq_used; /* last used time, seconds */
473 unsigned int ltq_usable:1; /* usable for striping */
474 };
475
476 /* Generic subset of OSTs */
477 struct ost_pool {
478 __u32 *op_array; /* array of index of
479 lov_obd->lov_tgts */
480 unsigned int op_count; /* number of OSTs in the array */
481 unsigned int op_size; /* allocated size of lp_array */
482 struct rw_semaphore op_rw_sem; /* to protect ost_pool use */
483 };
484
485 /* Round-robin allocator data */
486 struct lov_qos_rr {
487 __u32 lqr_start_idx; /* start index of new inode */
488 __u32 lqr_offset_idx; /* aliasing for start_idx */
489 int lqr_start_count; /* reseed counter */
490 struct ost_pool lqr_pool; /* round-robin optimized list */
491 unsigned long lqr_dirty:1; /* recalc round-robin list */
492 };
493
494 /* allow statfs data caching for 1 second */
495 #define OBD_STATFS_CACHE_SECONDS 1
496
497 struct lov_statfs_data {
498 struct obd_info lsd_oi;
499 struct obd_statfs lsd_statfs;
500 };
501 /* Stripe placement optimization */
502 struct lov_qos {
503 struct list_head lq_oss_list; /* list of OSSs that targets use */
504 struct rw_semaphore lq_rw_sem;
505 __u32 lq_active_oss_count;
506 unsigned int lq_prio_free; /* priority for free space */
507 unsigned int lq_threshold_rr;/* priority for rr */
508 struct lov_qos_rr lq_rr; /* round robin qos data */
509 unsigned long lq_dirty:1, /* recalc qos data */
510 lq_same_space:1,/* the ost's all have approx.
511 the same space avail */
512 lq_reset:1, /* zero current penalties */
513 lq_statfs_in_progress:1; /* statfs op in
514 progress */
515 /* qos statfs data */
516 struct lov_statfs_data *lq_statfs_data;
517 wait_queue_head_t lq_statfs_waitq; /* waitqueue to notify statfs
518 * requests completion */
519 };
520
521 struct lov_tgt_desc {
522 struct list_head ltd_kill;
523 struct obd_uuid ltd_uuid;
524 struct obd_device *ltd_obd;
525 struct obd_export *ltd_exp;
526 struct ltd_qos ltd_qos; /* qos info per target */
527 __u32 ltd_gen;
528 __u32 ltd_index; /* index in lov_obd->tgts */
529 unsigned long ltd_active:1,/* is this target up for requests */
530 ltd_activate:1,/* should target be activated */
531 ltd_reap:1; /* should this target be deleted */
532 };
533
534 /* Pool metadata */
535 #define pool_tgt_size(_p) _p->pool_obds.op_size
536 #define pool_tgt_count(_p) _p->pool_obds.op_count
537 #define pool_tgt_array(_p) _p->pool_obds.op_array
538 #define pool_tgt_rw_sem(_p) _p->pool_obds.op_rw_sem
539
540 struct pool_desc {
541 char pool_name[LOV_MAXPOOLNAME + 1]; /* name of pool */
542 struct ost_pool pool_obds; /* pool members */
543 atomic_t pool_refcount; /* pool ref. counter */
544 struct lov_qos_rr pool_rr; /* round robin qos */
545 struct hlist_node pool_hash; /* access by poolname */
546 struct list_head pool_list; /* serial access */
547 struct proc_dir_entry *pool_proc_entry; /* file in /proc */
548 struct obd_device *pool_lobd; /* obd of the lov/lod to which
549 * this pool belongs */
550 };
551
552 struct lov_obd {
553 struct lov_desc desc;
554 struct lov_tgt_desc **lov_tgts; /* sparse array */
555 struct ost_pool lov_packed; /* all OSTs in a packed
556 array */
557 struct mutex lov_lock;
558 struct obd_connect_data lov_ocd;
559 atomic_t lov_refcount;
560 __u32 lov_tgt_count; /* how many OBD's */
561 __u32 lov_active_tgt_count; /* how many active */
562 __u32 lov_death_row;/* tgts scheduled to be deleted */
563 __u32 lov_tgt_size; /* size of tgts array */
564 int lov_connects;
565 int lov_pool_count;
566 struct cfs_hash *lov_pools_hash_body; /* used for key access */
567 struct list_head lov_pool_list; /* used for sequential access */
568 struct proc_dir_entry *lov_pool_proc_entry;
569 enum lustre_sec_part lov_sp_me;
570
571 /* Cached LRU pages from upper layer */
572 void *lov_cache;
573
574 struct rw_semaphore lov_notify_lock;
575 };
576
577 struct lmv_tgt_desc {
578 struct obd_uuid ltd_uuid;
579 struct obd_export *ltd_exp;
580 int ltd_idx;
581 struct mutex ltd_fid_mutex;
582 unsigned long ltd_active:1; /* target up for requests */
583 };
584
585 enum placement_policy {
586 PLACEMENT_CHAR_POLICY = 0,
587 PLACEMENT_NID_POLICY = 1,
588 PLACEMENT_INVAL_POLICY = 2,
589 PLACEMENT_MAX_POLICY
590 };
591
592 struct lmv_obd {
593 int refcount;
594 struct lu_client_fld lmv_fld;
595 spinlock_t lmv_lock;
596 enum placement_policy lmv_placement;
597 struct lmv_desc desc;
598 struct obd_uuid cluuid;
599 struct obd_export *exp;
600
601 struct mutex init_mutex;
602 int connected;
603 int max_easize;
604 int max_def_easize;
605 int max_cookiesize;
606 int max_def_cookiesize;
607 int server_timeout;
608
609 int tgts_size; /* size of tgts array */
610 struct lmv_tgt_desc **tgts;
611
612 struct obd_connect_data conn_data;
613 };
614
615 struct niobuf_local {
616 __u64 lnb_file_offset;
617 __u32 lnb_page_offset;
618 __u32 len;
619 __u32 flags;
620 struct page *page;
621 struct dentry *dentry;
622 int lnb_grant_used;
623 int rc;
624 };
625
626 #define LUSTRE_FLD_NAME "fld"
627 #define LUSTRE_SEQ_NAME "seq"
628
629 #define LUSTRE_MDD_NAME "mdd"
630 #define LUSTRE_OSD_LDISKFS_NAME "osd-ldiskfs"
631 #define LUSTRE_OSD_ZFS_NAME "osd-zfs"
632 #define LUSTRE_VVP_NAME "vvp"
633 #define LUSTRE_LMV_NAME "lmv"
634 #define LUSTRE_SLP_NAME "slp"
635 #define LUSTRE_LOD_NAME "lod"
636 #define LUSTRE_OSP_NAME "osp"
637 #define LUSTRE_LWP_NAME "lwp"
638
639 /* obd device type names */
640 /* FIXME all the references to LUSTRE_MDS_NAME should be swapped with LUSTRE_MDT_NAME */
641 #define LUSTRE_MDS_NAME "mds"
642 #define LUSTRE_MDT_NAME "mdt"
643 #define LUSTRE_MDC_NAME "mdc"
644 #define LUSTRE_OSS_NAME "ost" /* FIXME change name to oss */
645 #define LUSTRE_OST_NAME "obdfilter" /* FIXME change name to ost */
646 #define LUSTRE_OSC_NAME "osc"
647 #define LUSTRE_LOV_NAME "lov"
648 #define LUSTRE_MGS_NAME "mgs"
649 #define LUSTRE_MGC_NAME "mgc"
650
651 #define LUSTRE_ECHO_NAME "obdecho"
652 #define LUSTRE_ECHO_CLIENT_NAME "echo_client"
653 #define LUSTRE_QMT_NAME "qmt"
654
655 /* Constant obd names (post-rename) */
656 #define LUSTRE_MDS_OBDNAME "MDS"
657 #define LUSTRE_OSS_OBDNAME "OSS"
658 #define LUSTRE_MGS_OBDNAME "MGS"
659 #define LUSTRE_MGC_OBDNAME "MGC"
660
661 /* Don't conflict with on-wire flags OBD_BRW_WRITE, etc */
662 #define N_LOCAL_TEMP_PAGE 0x10000000
663
664 struct obd_trans_info {
665 __u64 oti_transno;
666 __u64 oti_xid;
667 /* Only used on the server side for tracking acks. */
668 struct oti_req_ack_lock {
669 struct lustre_handle lock;
670 __u32 mode;
671 } oti_ack_locks[4];
672 void *oti_handle;
673 struct llog_cookie oti_onecookie;
674 struct llog_cookie *oti_logcookies;
675 int oti_numcookies;
676 /** synchronous write is needed */
677 unsigned long oti_sync_write:1;
678
679 /* initial thread handling transaction */
680 struct ptlrpc_thread *oti_thread;
681 __u32 oti_conn_cnt;
682 /** VBR: versions */
683 __u64 oti_pre_version;
684 /** JobID */
685 char *oti_jobid;
686
687 struct obd_uuid *oti_ost_uuid;
688 };
689
oti_init(struct obd_trans_info * oti,struct ptlrpc_request * req)690 static inline void oti_init(struct obd_trans_info *oti,
691 struct ptlrpc_request *req)
692 {
693 if (oti == NULL)
694 return;
695 memset(oti, 0, sizeof(*oti));
696
697 if (req == NULL)
698 return;
699
700 oti->oti_xid = req->rq_xid;
701 /** VBR: take versions from request */
702 if (req->rq_reqmsg != NULL &&
703 lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
704 __u64 *pre_version = lustre_msg_get_versions(req->rq_reqmsg);
705
706 oti->oti_pre_version = pre_version ? pre_version[0] : 0;
707 oti->oti_transno = lustre_msg_get_transno(req->rq_reqmsg);
708 }
709
710 /** called from mds_create_objects */
711 if (req->rq_repmsg != NULL)
712 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
713 oti->oti_thread = req->rq_svc_thread;
714 if (req->rq_reqmsg != NULL)
715 oti->oti_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
716 }
717
oti_alloc_cookies(struct obd_trans_info * oti,int num_cookies)718 static inline void oti_alloc_cookies(struct obd_trans_info *oti,
719 int num_cookies)
720 {
721 if (!oti)
722 return;
723
724 if (num_cookies == 1)
725 oti->oti_logcookies = &oti->oti_onecookie;
726 else
727 OBD_ALLOC_LARGE(oti->oti_logcookies,
728 num_cookies * sizeof(oti->oti_onecookie));
729
730 oti->oti_numcookies = num_cookies;
731 }
732
oti_free_cookies(struct obd_trans_info * oti)733 static inline void oti_free_cookies(struct obd_trans_info *oti)
734 {
735 if (!oti || !oti->oti_logcookies)
736 return;
737
738 if (oti->oti_logcookies == &oti->oti_onecookie)
739 LASSERT(oti->oti_numcookies == 1);
740 else
741 OBD_FREE_LARGE(oti->oti_logcookies,
742 oti->oti_numcookies*sizeof(oti->oti_onecookie));
743 oti->oti_logcookies = NULL;
744 oti->oti_numcookies = 0;
745 }
746
747 /*
748 * Events signalled through obd_notify() upcall-chain.
749 */
750 enum obd_notify_event {
751 /* target added */
752 OBD_NOTIFY_CREATE,
753 /* Device connect start */
754 OBD_NOTIFY_CONNECT,
755 /* Device activated */
756 OBD_NOTIFY_ACTIVE,
757 /* Device deactivated */
758 OBD_NOTIFY_INACTIVE,
759 /* Device disconnected */
760 OBD_NOTIFY_DISCON,
761 /* Connect data for import were changed */
762 OBD_NOTIFY_OCD,
763 /* Sync request */
764 OBD_NOTIFY_SYNC_NONBLOCK,
765 OBD_NOTIFY_SYNC,
766 /* Configuration event */
767 OBD_NOTIFY_CONFIG,
768 /* Administratively deactivate/activate event */
769 OBD_NOTIFY_DEACTIVATE,
770 OBD_NOTIFY_ACTIVATE
771 };
772
773 /*
774 * Data structure used to pass obd_notify()-event to non-obd listeners (llite
775 * and liblustre being main examples).
776 */
777 struct obd_notify_upcall {
778 int (*onu_upcall)(struct obd_device *host, struct obd_device *watched,
779 enum obd_notify_event ev, void *owner, void *data);
780 /* Opaque datum supplied by upper layer listener */
781 void *onu_owner;
782 };
783
784 struct target_recovery_data {
785 svc_handler_t trd_recovery_handler;
786 pid_t trd_processing_task;
787 struct completion trd_starting;
788 struct completion trd_finishing;
789 };
790
791 struct obd_llog_group {
792 int olg_seq;
793 struct llog_ctxt *olg_ctxts[LLOG_MAX_CTXTS];
794 wait_queue_head_t olg_waitq;
795 spinlock_t olg_lock;
796 struct mutex olg_cat_processing;
797 };
798
799 /* corresponds to one of the obd's */
800 #define OBD_DEVICE_MAGIC 0XAB5CD6EF
801 #define OBD_DEV_BY_DEVNAME 0xffffd0de
802
803 struct lvfs_run_ctxt {
804 struct dt_device *dt;
805 };
806
807 struct obd_device {
808 struct obd_type *obd_type;
809 __u32 obd_magic;
810
811 /* common and UUID name of this device */
812 char obd_name[MAX_OBD_NAME];
813 struct obd_uuid obd_uuid;
814
815 struct lu_device *obd_lu_dev;
816
817 int obd_minor;
818 /* bitfield modification is protected by obd_dev_lock */
819 unsigned long obd_attached:1, /* finished attach */
820 obd_set_up:1, /* finished setup */
821 obd_recovering:1, /* there are recoverable clients */
822 obd_abort_recovery:1,/* recovery expired */
823 obd_version_recov:1, /* obd uses version checking */
824 obd_replayable:1, /* recovery is enabled; inform clients */
825 obd_no_transno:1, /* no committed-transno notification */
826 obd_no_recov:1, /* fail instead of retry messages */
827 obd_stopping:1, /* started cleanup */
828 obd_starting:1, /* started setup */
829 obd_force:1, /* cleanup with > 0 obd refcount */
830 obd_fail:1, /* cleanup with failover */
831 obd_async_recov:1, /* allow asynchronous orphan cleanup */
832 obd_no_conn:1, /* deny new connections */
833 obd_inactive:1, /* device active/inactive
834 * (for /proc/status only!!) */
835 obd_no_ir:1, /* no imperative recovery. */
836 obd_process_conf:1; /* device is processing mgs config */
837 /* use separate field as it is set in interrupt to don't mess with
838 * protection of other bits using _bh lock */
839 unsigned long obd_recovery_expired:1;
840 /* uuid-export hash body */
841 struct cfs_hash *obd_uuid_hash;
842 /* nid-export hash body */
843 struct cfs_hash *obd_nid_hash;
844 /* nid stats body */
845 struct cfs_hash *obd_nid_stats_hash;
846 struct list_head obd_nid_stats;
847 atomic_t obd_refcount;
848 wait_queue_head_t obd_refcount_waitq;
849 struct list_head obd_exports;
850 struct list_head obd_unlinked_exports;
851 struct list_head obd_delayed_exports;
852 int obd_num_exports;
853 spinlock_t obd_nid_lock;
854 struct ldlm_namespace *obd_namespace;
855 struct ptlrpc_client obd_ldlm_client; /* XXX OST/MDS only */
856 /* a spinlock is OK for what we do now, may need a semaphore later */
857 spinlock_t obd_dev_lock; /* protect OBD bitfield above */
858 struct mutex obd_dev_mutex;
859 __u64 obd_last_committed;
860 spinlock_t obd_osfs_lock;
861 struct obd_statfs obd_osfs; /* locked by obd_osfs_lock */
862 __u64 obd_osfs_age;
863 struct lvfs_run_ctxt obd_lvfs_ctxt;
864 struct obd_llog_group obd_olg; /* default llog group */
865 struct obd_device *obd_observer;
866 struct rw_semaphore obd_observer_link_sem;
867 struct obd_notify_upcall obd_upcall;
868 struct obd_export *obd_self_export;
869 /* list of exports in LRU order, for ping evictor, with obd_dev_lock */
870 struct list_head obd_exports_timed;
871 time_t obd_eviction_timer; /* for ping evictor */
872
873 int obd_max_recoverable_clients;
874 atomic_t obd_connected_clients;
875 int obd_stale_clients;
876 int obd_delayed_clients;
877 /* this lock protects all recovery list_heads, timer and
878 * obd_next_recovery_transno value */
879 spinlock_t obd_recovery_task_lock;
880 __u64 obd_next_recovery_transno;
881 int obd_replayed_requests;
882 int obd_requests_queued_for_recovery;
883 wait_queue_head_t obd_next_transno_waitq;
884 /* protected by obd_recovery_task_lock */
885 struct timer_list obd_recovery_timer;
886 time_t obd_recovery_start; /* seconds */
887 time_t obd_recovery_end; /* seconds, for lprocfs_status */
888 int obd_recovery_time_hard;
889 int obd_recovery_timeout;
890 int obd_recovery_ir_factor;
891
892 /* new recovery stuff from CMD2 */
893 struct target_recovery_data obd_recovery_data;
894 int obd_replayed_locks;
895 atomic_t obd_req_replay_clients;
896 atomic_t obd_lock_replay_clients;
897 /* all lists are protected by obd_recovery_task_lock */
898 struct list_head obd_req_replay_queue;
899 struct list_head obd_lock_replay_queue;
900 struct list_head obd_final_req_queue;
901 int obd_recovery_stage;
902
903 union {
904 struct client_obd cli;
905 struct echo_client_obd echo_client;
906 struct lov_obd lov;
907 struct lmv_obd lmv;
908 } u;
909 /* Fields used by LProcFS */
910 unsigned int obd_cntr_base;
911 struct lprocfs_stats *obd_stats;
912
913 unsigned int md_cntr_base;
914 struct lprocfs_stats *md_stats;
915
916 struct proc_dir_entry *obd_proc_entry;
917 void *obd_proc_private; /* type private PDEs */
918 struct proc_dir_entry *obd_proc_exports_entry;
919 struct proc_dir_entry *obd_svc_procroot;
920 struct lprocfs_stats *obd_svc_stats;
921 atomic_t obd_evict_inprogress;
922 wait_queue_head_t obd_evict_inprogress_waitq;
923 struct list_head obd_evict_list; /* protected with pet_lock */
924
925 /**
926 * Ldlm pool part. Save last calculated SLV and Limit.
927 */
928 rwlock_t obd_pool_lock;
929 int obd_pool_limit;
930 __u64 obd_pool_slv;
931
932 /**
933 * A list of outstanding class_incref()'s against this obd. For
934 * debugging.
935 */
936 struct lu_ref obd_reference;
937
938 int obd_conn_inprogress;
939 };
940
941 #define OBD_LLOG_FL_SENDNOW 0x0001
942 #define OBD_LLOG_FL_EXIT 0x0002
943
944 enum obd_cleanup_stage {
945 /* Special case hack for MDS LOVs */
946 OBD_CLEANUP_EARLY,
947 /* can be directly mapped to .ldto_device_fini() */
948 OBD_CLEANUP_EXPORTS,
949 };
950
951 /* get/set_info keys */
952 #define KEY_ASYNC "async"
953 #define KEY_BLOCKSIZE_BITS "blocksize_bits"
954 #define KEY_BLOCKSIZE "blocksize"
955 #define KEY_CAPA_KEY "capa_key"
956 #define KEY_CHANGELOG_CLEAR "changelog_clear"
957 #define KEY_FID2PATH "fid2path"
958 #define KEY_CHECKSUM "checksum"
959 #define KEY_CLEAR_FS "clear_fs"
960 #define KEY_CONN_DATA "conn_data"
961 #define KEY_EVICT_BY_NID "evict_by_nid"
962 #define KEY_FIEMAP "fiemap"
963 #define KEY_FLUSH_CTX "flush_ctx"
964 #define KEY_GRANT_SHRINK "grant_shrink"
965 #define KEY_HSM_COPYTOOL_SEND "hsm_send"
966 #define KEY_INIT_RECOV_BACKUP "init_recov_bk"
967 #define KEY_INIT_RECOV "initial_recov"
968 #define KEY_INTERMDS "inter_mds"
969 #define KEY_LAST_ID "last_id"
970 #define KEY_LAST_FID "last_fid"
971 #define KEY_LOCK_TO_STRIPE "lock_to_stripe"
972 #define KEY_LOVDESC "lovdesc"
973 #define KEY_LOV_IDX "lov_idx"
974 #define KEY_MAX_EASIZE "max_easize"
975 #define KEY_DEFAULT_EASIZE "default_easize"
976 #define KEY_MAX_COOKIESIZE "max_cookiesize"
977 #define KEY_DEFAULT_COOKIESIZE "default_cookiesize"
978 #define KEY_MDS_CONN "mds_conn"
979 #define KEY_MGSSEC "mgssec"
980 #define KEY_NEXT_ID "next_id"
981 #define KEY_READ_ONLY "read-only"
982 #define KEY_REGISTER_TARGET "register_target"
983 #define KEY_SET_FS "set_fs"
984 #define KEY_TGT_COUNT "tgt_count"
985 /* KEY_SET_INFO in lustre_idl.h */
986 #define KEY_SPTLRPC_CONF "sptlrpc_conf"
987 #define KEY_CONNECT_FLAG "connect_flags"
988 #define KEY_SYNC_LOCK_CANCEL "sync_lock_cancel"
989
990 #define KEY_CACHE_SET "cache_set"
991 #define KEY_CACHE_LRU_SHRINK "cache_lru_shrink"
992 #define KEY_CHANGELOG_INDEX "changelog_index"
993
994 struct lu_context;
995
996 /* /!\ must be coherent with include/linux/namei.h on patched kernel */
997 #define IT_OPEN (1 << 0)
998 #define IT_CREAT (1 << 1)
999 #define IT_READDIR (1 << 2)
1000 #define IT_GETATTR (1 << 3)
1001 #define IT_LOOKUP (1 << 4)
1002 #define IT_UNLINK (1 << 5)
1003 #define IT_TRUNC (1 << 6)
1004 #define IT_GETXATTR (1 << 7)
1005 #define IT_EXEC (1 << 8)
1006 #define IT_PIN (1 << 9)
1007 #define IT_LAYOUT (1 << 10)
1008 #define IT_QUOTA_DQACQ (1 << 11)
1009 #define IT_QUOTA_CONN (1 << 12)
1010 #define IT_SETXATTR (1 << 13)
1011
it_to_lock_mode(struct lookup_intent * it)1012 static inline int it_to_lock_mode(struct lookup_intent *it)
1013 {
1014 /* CREAT needs to be tested before open (both could be set) */
1015 if (it->it_op & IT_CREAT)
1016 return LCK_CW;
1017 else if (it->it_op & (IT_READDIR | IT_GETATTR | IT_OPEN | IT_LOOKUP |
1018 IT_LAYOUT))
1019 return LCK_CR;
1020 else if (it->it_op & IT_GETXATTR)
1021 return LCK_PR;
1022 else if (it->it_op & IT_SETXATTR)
1023 return LCK_PW;
1024
1025 LASSERTF(0, "Invalid it_op: %d\n", it->it_op);
1026 return -EINVAL;
1027 }
1028
1029 struct md_op_data {
1030 struct lu_fid op_fid1; /* operation fid1 (usually parent) */
1031 struct lu_fid op_fid2; /* operation fid2 (usually child) */
1032 struct lu_fid op_fid3; /* 2 extra fids to find conflicting */
1033 struct lu_fid op_fid4; /* to the operation locks. */
1034 u32 op_mds; /* what mds server open will go to */
1035 struct lustre_handle op_handle;
1036 s64 op_mod_time;
1037 const char *op_name;
1038 int op_namelen;
1039 __u32 op_mode;
1040 struct lmv_stripe_md *op_mea1;
1041 struct lmv_stripe_md *op_mea2;
1042 __u32 op_suppgids[2];
1043 __u32 op_fsuid;
1044 __u32 op_fsgid;
1045 cfs_cap_t op_cap;
1046 void *op_data;
1047
1048 /* iattr fields and blocks. */
1049 struct iattr op_attr;
1050 unsigned int op_attr_flags;
1051 __u64 op_valid;
1052 loff_t op_attr_blocks;
1053
1054 /* Size-on-MDS epoch and flags. */
1055 __u64 op_ioepoch;
1056 __u32 op_flags;
1057
1058 /* Capa fields */
1059 struct obd_capa *op_capa1;
1060 struct obd_capa *op_capa2;
1061
1062 /* Various operation flags. */
1063 enum mds_op_bias op_bias;
1064
1065 /* Operation type */
1066 __u32 op_opc;
1067
1068 /* Used by readdir */
1069 __u64 op_offset;
1070
1071 /* Used by readdir */
1072 __u32 op_npages;
1073
1074 /* used to transfer info between the stacks of MD client
1075 * see enum op_cli_flags */
1076 __u32 op_cli_flags;
1077
1078 /* File object data version for HSM release, on client */
1079 __u64 op_data_version;
1080 struct lustre_handle op_lease_handle;
1081 };
1082
1083 enum op_cli_flags {
1084 CLI_SET_MEA = 1 << 0,
1085 CLI_RM_ENTRY = 1 << 1,
1086 };
1087
1088 struct md_enqueue_info;
1089 /* metadata stat-ahead */
1090
1091 struct md_enqueue_info {
1092 struct md_op_data mi_data;
1093 struct lookup_intent mi_it;
1094 struct lustre_handle mi_lockh;
1095 struct inode *mi_dir;
1096 int (*mi_cb)(struct ptlrpc_request *req,
1097 struct md_enqueue_info *minfo, int rc);
1098 __u64 mi_cbdata;
1099 unsigned int mi_generation;
1100 };
1101
1102 struct obd_ops {
1103 struct module *o_owner;
1104 int (*o_iocontrol)(unsigned int cmd, struct obd_export *exp, int len,
1105 void *karg, void *uarg);
1106 int (*o_get_info)(const struct lu_env *env, struct obd_export *,
1107 __u32 keylen, void *key, __u32 *vallen, void *val,
1108 struct lov_stripe_md *lsm);
1109 int (*o_set_info_async)(const struct lu_env *, struct obd_export *,
1110 __u32 keylen, void *key,
1111 __u32 vallen, void *val,
1112 struct ptlrpc_request_set *set);
1113 int (*o_attach)(struct obd_device *dev, u32 len, void *data);
1114 int (*o_detach)(struct obd_device *dev);
1115 int (*o_setup)(struct obd_device *dev, struct lustre_cfg *cfg);
1116 int (*o_precleanup)(struct obd_device *dev,
1117 enum obd_cleanup_stage cleanup_stage);
1118 int (*o_cleanup)(struct obd_device *dev);
1119 int (*o_process_config)(struct obd_device *dev, u32 len, void *data);
1120 int (*o_postrecov)(struct obd_device *dev);
1121 int (*o_add_conn)(struct obd_import *imp, struct obd_uuid *uuid,
1122 int priority);
1123 int (*o_del_conn)(struct obd_import *imp, struct obd_uuid *uuid);
1124 /* connect to the target device with given connection
1125 * data. @ocd->ocd_connect_flags is modified to reflect flags actually
1126 * granted by the target, which are guaranteed to be a subset of flags
1127 * asked for. If @ocd == NULL, use default parameters. */
1128 int (*o_connect)(const struct lu_env *env,
1129 struct obd_export **exp, struct obd_device *src,
1130 struct obd_uuid *cluuid, struct obd_connect_data *ocd,
1131 void *localdata);
1132 int (*o_reconnect)(const struct lu_env *env,
1133 struct obd_export *exp, struct obd_device *src,
1134 struct obd_uuid *cluuid,
1135 struct obd_connect_data *ocd,
1136 void *localdata);
1137 int (*o_disconnect)(struct obd_export *exp);
1138
1139 /* Initialize/finalize fids infrastructure. */
1140 int (*o_fid_init)(struct obd_device *obd,
1141 struct obd_export *exp, enum lu_cli_type type);
1142 int (*o_fid_fini)(struct obd_device *obd);
1143
1144 /* Allocate new fid according to passed @hint. */
1145 int (*o_fid_alloc)(struct obd_export *exp, struct lu_fid *fid,
1146 struct md_op_data *op_data);
1147
1148 /*
1149 * Object with @fid is getting deleted, we may want to do something
1150 * about this.
1151 */
1152 int (*o_statfs)(const struct lu_env *, struct obd_export *exp,
1153 struct obd_statfs *osfs, __u64 max_age, __u32 flags);
1154 int (*o_statfs_async)(struct obd_export *exp, struct obd_info *oinfo,
1155 __u64 max_age, struct ptlrpc_request_set *set);
1156 int (*o_packmd)(struct obd_export *exp, struct lov_mds_md **disk_tgt,
1157 struct lov_stripe_md *mem_src);
1158 int (*o_unpackmd)(struct obd_export *exp,
1159 struct lov_stripe_md **mem_tgt,
1160 struct lov_mds_md *disk_src, int disk_len);
1161 int (*o_preallocate)(struct lustre_handle *, u32 *req, u64 *ids);
1162 /* FIXME: add fid capability support for create & destroy! */
1163 int (*o_create)(const struct lu_env *env, struct obd_export *exp,
1164 struct obdo *oa, struct lov_stripe_md **ea,
1165 struct obd_trans_info *oti);
1166 int (*o_destroy)(const struct lu_env *env, struct obd_export *exp,
1167 struct obdo *oa, struct lov_stripe_md *ea,
1168 struct obd_trans_info *oti, struct obd_export *md_exp,
1169 void *capa);
1170 int (*o_setattr)(const struct lu_env *, struct obd_export *exp,
1171 struct obd_info *oinfo, struct obd_trans_info *oti);
1172 int (*o_setattr_async)(struct obd_export *exp, struct obd_info *oinfo,
1173 struct obd_trans_info *oti,
1174 struct ptlrpc_request_set *rqset);
1175 int (*o_getattr)(const struct lu_env *env, struct obd_export *exp,
1176 struct obd_info *oinfo);
1177 int (*o_getattr_async)(struct obd_export *exp, struct obd_info *oinfo,
1178 struct ptlrpc_request_set *set);
1179 int (*o_adjust_kms)(struct obd_export *exp, struct lov_stripe_md *lsm,
1180 u64 size, int shrink);
1181 int (*o_preprw)(const struct lu_env *env, int cmd,
1182 struct obd_export *exp, struct obdo *oa, int objcount,
1183 struct obd_ioobj *obj, struct niobuf_remote *remote,
1184 int *nr_pages, struct niobuf_local *local,
1185 struct obd_trans_info *oti, struct lustre_capa *capa);
1186 int (*o_commitrw)(const struct lu_env *env, int cmd,
1187 struct obd_export *exp, struct obdo *oa,
1188 int objcount, struct obd_ioobj *obj,
1189 struct niobuf_remote *remote, int pages,
1190 struct niobuf_local *local,
1191 struct obd_trans_info *oti, int rc);
1192 int (*o_find_cbdata)(struct obd_export *, struct lov_stripe_md *,
1193 ldlm_iterator_t it, void *data);
1194 int (*o_init_export)(struct obd_export *exp);
1195 int (*o_destroy_export)(struct obd_export *exp);
1196
1197 /* metadata-only methods */
1198 int (*o_import_event)(struct obd_device *, struct obd_import *,
1199 enum obd_import_event);
1200
1201 int (*o_notify)(struct obd_device *obd, struct obd_device *watched,
1202 enum obd_notify_event ev, void *data);
1203
1204 int (*o_health_check)(const struct lu_env *env, struct obd_device *);
1205 struct obd_uuid *(*o_get_uuid)(struct obd_export *exp);
1206
1207 /* quota methods */
1208 int (*o_quotacheck)(struct obd_device *, struct obd_export *,
1209 struct obd_quotactl *);
1210 int (*o_quotactl)(struct obd_device *, struct obd_export *,
1211 struct obd_quotactl *);
1212
1213 /* pools methods */
1214 int (*o_pool_new)(struct obd_device *obd, char *poolname);
1215 int (*o_pool_del)(struct obd_device *obd, char *poolname);
1216 int (*o_pool_add)(struct obd_device *obd, char *poolname,
1217 char *ostname);
1218 int (*o_pool_rem)(struct obd_device *obd, char *poolname,
1219 char *ostname);
1220 void (*o_getref)(struct obd_device *obd);
1221 void (*o_putref)(struct obd_device *obd);
1222 /*
1223 * NOTE: If adding ops, add another LPROCFS_OBD_OP_INIT() line
1224 * to lprocfs_alloc_obd_stats() in obdclass/lprocfs_status.c.
1225 * Also, add a wrapper function in include/linux/obd_class.h. */
1226 };
1227
1228 enum {
1229 LUSTRE_OPC_MKDIR = (1 << 0),
1230 LUSTRE_OPC_SYMLINK = (1 << 1),
1231 LUSTRE_OPC_MKNOD = (1 << 2),
1232 LUSTRE_OPC_CREATE = (1 << 3),
1233 LUSTRE_OPC_ANY = (1 << 4)
1234 };
1235
1236 /* lmv structures */
1237 #define MEA_MAGIC_LAST_CHAR 0xb2221ca1
1238 #define MEA_MAGIC_ALL_CHARS 0xb222a11c
1239 #define MEA_MAGIC_HASH_SEGMENT 0xb222a11b
1240
1241 #define MAX_HASH_SIZE_32 0x7fffffffUL
1242 #define MAX_HASH_SIZE 0x7fffffffffffffffULL
1243 #define MAX_HASH_HIGHEST_BIT 0x1000000000000000ULL
1244
1245 struct lustre_md {
1246 struct mdt_body *body;
1247 struct lov_stripe_md *lsm;
1248 struct lmv_stripe_md *mea;
1249 #ifdef CONFIG_FS_POSIX_ACL
1250 struct posix_acl *posix_acl;
1251 #endif
1252 struct mdt_remote_perm *remote_perm;
1253 struct obd_capa *mds_capa;
1254 struct obd_capa *oss_capa;
1255 };
1256
1257 struct md_open_data {
1258 struct obd_client_handle *mod_och;
1259 struct ptlrpc_request *mod_open_req;
1260 struct ptlrpc_request *mod_close_req;
1261 atomic_t mod_refcount;
1262 bool mod_is_create;
1263 };
1264
1265 struct lookup_intent;
1266
1267 struct md_ops {
1268 int (*m_getstatus)(struct obd_export *, struct lu_fid *,
1269 struct obd_capa **);
1270 int (*m_null_inode)(struct obd_export *, const struct lu_fid *);
1271 int (*m_find_cbdata)(struct obd_export *, const struct lu_fid *,
1272 ldlm_iterator_t, void *);
1273 int (*m_close)(struct obd_export *, struct md_op_data *,
1274 struct md_open_data *, struct ptlrpc_request **);
1275 int (*m_create)(struct obd_export *, struct md_op_data *,
1276 const void *, int, int, __u32, __u32, cfs_cap_t,
1277 __u64, struct ptlrpc_request **);
1278 int (*m_done_writing)(struct obd_export *, struct md_op_data *,
1279 struct md_open_data *);
1280 int (*m_enqueue)(struct obd_export *, struct ldlm_enqueue_info *,
1281 struct lookup_intent *, struct md_op_data *,
1282 struct lustre_handle *, void *, int,
1283 struct ptlrpc_request **, __u64);
1284 int (*m_getattr)(struct obd_export *, struct md_op_data *,
1285 struct ptlrpc_request **);
1286 int (*m_getattr_name)(struct obd_export *, struct md_op_data *,
1287 struct ptlrpc_request **);
1288 int (*m_intent_lock)(struct obd_export *, struct md_op_data *,
1289 void *, int, struct lookup_intent *, int,
1290 struct ptlrpc_request **,
1291 ldlm_blocking_callback, __u64);
1292 int (*m_link)(struct obd_export *, struct md_op_data *,
1293 struct ptlrpc_request **);
1294 int (*m_rename)(struct obd_export *, struct md_op_data *,
1295 const char *, int, const char *, int,
1296 struct ptlrpc_request **);
1297 int (*m_is_subdir)(struct obd_export *, const struct lu_fid *,
1298 const struct lu_fid *,
1299 struct ptlrpc_request **);
1300 int (*m_setattr)(struct obd_export *, struct md_op_data *, void *,
1301 int , void *, int, struct ptlrpc_request **,
1302 struct md_open_data **mod);
1303 int (*m_sync)(struct obd_export *, const struct lu_fid *,
1304 struct obd_capa *, struct ptlrpc_request **);
1305 int (*m_readpage)(struct obd_export *, struct md_op_data *,
1306 struct page **, struct ptlrpc_request **);
1307
1308 int (*m_unlink)(struct obd_export *, struct md_op_data *,
1309 struct ptlrpc_request **);
1310
1311 int (*m_setxattr)(struct obd_export *, const struct lu_fid *,
1312 struct obd_capa *, u64, const char *,
1313 const char *, int, int, int, __u32,
1314 struct ptlrpc_request **);
1315
1316 int (*m_getxattr)(struct obd_export *, const struct lu_fid *,
1317 struct obd_capa *, u64, const char *,
1318 const char *, int, int, int,
1319 struct ptlrpc_request **);
1320
1321 int (*m_init_ea_size)(struct obd_export *, int, int, int, int);
1322
1323 int (*m_get_lustre_md)(struct obd_export *, struct ptlrpc_request *,
1324 struct obd_export *, struct obd_export *,
1325 struct lustre_md *);
1326
1327 int (*m_free_lustre_md)(struct obd_export *, struct lustre_md *);
1328
1329 int (*m_set_open_replay_data)(struct obd_export *,
1330 struct obd_client_handle *,
1331 struct lookup_intent *);
1332 int (*m_clear_open_replay_data)(struct obd_export *,
1333 struct obd_client_handle *);
1334 int (*m_set_lock_data)(struct obd_export *, __u64 *, void *, __u64 *);
1335
1336 ldlm_mode_t (*m_lock_match)(struct obd_export *, __u64,
1337 const struct lu_fid *, ldlm_type_t,
1338 ldlm_policy_data_t *, ldlm_mode_t,
1339 struct lustre_handle *);
1340
1341 int (*m_cancel_unused)(struct obd_export *, const struct lu_fid *,
1342 ldlm_policy_data_t *, ldlm_mode_t,
1343 ldlm_cancel_flags_t flags, void *opaque);
1344 int (*m_renew_capa)(struct obd_export *, struct obd_capa *oc,
1345 renew_capa_cb_t cb);
1346 int (*m_unpack_capa)(struct obd_export *, struct ptlrpc_request *,
1347 const struct req_msg_field *, struct obd_capa **);
1348
1349 int (*m_get_remote_perm)(struct obd_export *, const struct lu_fid *,
1350 struct obd_capa *, __u32,
1351 struct ptlrpc_request **);
1352
1353 int (*m_intent_getattr_async)(struct obd_export *,
1354 struct md_enqueue_info *,
1355 struct ldlm_enqueue_info *);
1356
1357 int (*m_revalidate_lock)(struct obd_export *, struct lookup_intent *,
1358 struct lu_fid *, __u64 *bits);
1359
1360 /*
1361 * NOTE: If adding ops, add another LPROCFS_MD_OP_INIT() line to
1362 * lprocfs_alloc_md_stats() in obdclass/lprocfs_status.c. Also, add a
1363 * wrapper function in include/linux/obd_class.h.
1364 */
1365 };
1366
1367 struct lsm_operations {
1368 void (*lsm_free)(struct lov_stripe_md *);
1369 int (*lsm_destroy)(struct lov_stripe_md *, struct obdo *oa,
1370 struct obd_export *md_exp);
1371 void (*lsm_stripe_by_index)(struct lov_stripe_md *, int *, u64 *,
1372 u64 *);
1373 void (*lsm_stripe_by_offset)(struct lov_stripe_md *, int *, u64 *,
1374 u64 *);
1375 int (*lsm_lmm_verify)(struct lov_mds_md *lmm, int lmm_bytes,
1376 __u16 *stripe_count);
1377 int (*lsm_unpackmd)(struct lov_obd *lov, struct lov_stripe_md *lsm,
1378 struct lov_mds_md *lmm);
1379 };
1380
1381 extern const struct lsm_operations lsm_v1_ops;
1382 extern const struct lsm_operations lsm_v3_ops;
lsm_op_find(int magic)1383 static inline const struct lsm_operations *lsm_op_find(int magic)
1384 {
1385 switch (magic) {
1386 case LOV_MAGIC_V1:
1387 return &lsm_v1_ops;
1388 case LOV_MAGIC_V3:
1389 return &lsm_v3_ops;
1390 default:
1391 CERROR("Cannot recognize lsm_magic %08x\n", magic);
1392 return NULL;
1393 }
1394 }
1395
1396 /* Requests for obd_extent_calc() */
1397 #define OBD_CALC_STRIPE_START 1
1398 #define OBD_CALC_STRIPE_END 2
1399
oinfo_capa(struct obd_info * oinfo)1400 static inline struct lustre_capa *oinfo_capa(struct obd_info *oinfo)
1401 {
1402 return oinfo->oi_capa;
1403 }
1404
obd_mod_alloc(void)1405 static inline struct md_open_data *obd_mod_alloc(void)
1406 {
1407 struct md_open_data *mod;
1408
1409 OBD_ALLOC_PTR(mod);
1410 if (mod == NULL)
1411 return NULL;
1412 atomic_set(&mod->mod_refcount, 1);
1413 return mod;
1414 }
1415
1416 #define obd_mod_get(mod) atomic_inc(&(mod)->mod_refcount)
1417 #define obd_mod_put(mod) \
1418 ({ \
1419 if (atomic_dec_and_test(&(mod)->mod_refcount)) { \
1420 if ((mod)->mod_open_req) \
1421 ptlrpc_req_finished((mod)->mod_open_req); \
1422 OBD_FREE_PTR(mod); \
1423 } \
1424 })
1425
1426 void obdo_from_inode(struct obdo *dst, struct inode *src, u32 valid);
1427 void obdo_set_parent_fid(struct obdo *dst, const struct lu_fid *parent);
1428
1429 /* return 1 if client should be resend request */
client_should_resend(int resend,struct client_obd * cli)1430 static inline int client_should_resend(int resend, struct client_obd *cli)
1431 {
1432 return atomic_read(&cli->cl_resends) ?
1433 atomic_read(&cli->cl_resends) > resend : 1;
1434 }
1435
1436 /**
1437 * Return device name for this device
1438 *
1439 * XXX: lu_device is declared before obd_device, while a pointer pointing
1440 * back to obd_device in lu_device, so this helper function defines here
1441 * instead of in lu_object.h
1442 */
lu_dev_name(const struct lu_device * lu_dev)1443 static inline const char *lu_dev_name(const struct lu_device *lu_dev)
1444 {
1445 return lu_dev->ld_obd->obd_name;
1446 }
1447
filename_is_volatile(const char * name,int namelen,int * idx)1448 static inline bool filename_is_volatile(const char *name, int namelen, int *idx)
1449 {
1450 const char *start;
1451 char *end;
1452
1453 if (strncmp(name, LUSTRE_VOLATILE_HDR, LUSTRE_VOLATILE_HDR_LEN) != 0)
1454 return false;
1455
1456 /* caller does not care of idx */
1457 if (idx == NULL)
1458 return true;
1459
1460 /* volatile file, the MDT can be set from name */
1461 /* name format is LUSTRE_VOLATILE_HDR:[idx]: */
1462 /* if no MDT is specified, use std way */
1463 if (namelen < LUSTRE_VOLATILE_HDR_LEN + 2)
1464 goto bad_format;
1465 /* test for no MDT idx case */
1466 if ((*(name + LUSTRE_VOLATILE_HDR_LEN) == ':') &&
1467 (*(name + LUSTRE_VOLATILE_HDR_LEN + 1) == ':')) {
1468 *idx = -1;
1469 return true;
1470 }
1471 /* we have an idx, read it */
1472 start = name + LUSTRE_VOLATILE_HDR_LEN + 1;
1473 *idx = strtoul(start, &end, 0);
1474 /* error cases:
1475 * no digit, no trailing :, negative value
1476 */
1477 if (((*idx == 0) && (end == start)) ||
1478 (*end != ':') || (*idx < 0))
1479 goto bad_format;
1480
1481 return true;
1482 bad_format:
1483 /* bad format of mdt idx, we cannot return an error
1484 * to caller so we use hash algo */
1485 CERROR("Bad volatile file name format: %s\n",
1486 name + LUSTRE_VOLATILE_HDR_LEN);
1487 return false;
1488 }
1489
cli_brw_size(struct obd_device * obd)1490 static inline int cli_brw_size(struct obd_device *obd)
1491 {
1492 LASSERT(obd != NULL);
1493 return obd->u.cli.cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
1494 }
1495
1496 #endif /* __OBD_H */
1497