4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 #include "linux/obd.h"
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
47 #define IOC_MDC_TYPE 'i'
48 #define IOC_MDC_MIN_NR 20
49 #define IOC_MDC_MAX_NR 50
51 #include "lustre/lustre_idl.h"
52 #include "lustre_lib.h"
54 #include "lustre_export.h"
55 #include "lustre_fid.h"
56 #include "lustre_fld.h"
57 #include "lustre_capa.h"
59 #define MAX_OBD_DEVICES 8192
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 */
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;
78 static inline void loi_kms_set(struct lov_oinfo *oinfo, __u64 kms)
81 oinfo->loi_kms_valid = 1;
84 static inline void loi_init(struct lov_oinfo *loi)
88 struct lov_stripe_md {
91 pid_t lsm_lock_owner; /* debugging */
93 /* maximum possible file size, might change as OSTs status changes,
94 * e.g. disconnected, deactivated */
98 struct ost_id lw_object_oi; /* lov object id/seq */
100 /* LOV-private members start here -- only for use in lov/. */
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 */
109 struct lov_oinfo *lsm_oinfo[0];
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
120 static inline bool lsm_is_released(struct lov_stripe_md *lsm)
122 return !!(lsm->lsm_pattern & LOV_PATTERN_F_RELEASED);
125 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
129 if (lsm_is_released(lsm))
134 static inline int lov_stripe_md_size(unsigned int stripe_count)
136 struct lov_stripe_md lsm;
138 return sizeof(lsm) + stripe_count * sizeof(lsm.lsm_oinfo[0]);
143 typedef int (*obd_enqueue_update_f)(void *cookie, int rc);
145 /* obd info for a particular level (lov, osc). */
147 /* Flags used for set request specific flags:
148 - while lock handling, the flags obtained on the enqueue
149 request are set here.
150 - while stats, the flags used for control delay/resend.
151 - while setattr, the flags used for distinguish punch operation
154 /* lsm data specific for every OSC. */
155 struct lov_stripe_md *oi_md;
156 /* obdo data specific for every OSC, if needed at all. */
158 /* statfs data specific for every OSC, if needed at all. */
159 struct obd_statfs *oi_osfs;
160 /* An update callback which is called to update some data on upper
161 * level. E.g. it is used for update lsm->lsm_oinfo at every received
162 * request in osc level for enqueue requests. It is also possible to
163 * update some caller data from LOV layer if needed. */
164 obd_enqueue_update_f oi_cb_up;
165 /* oss capability, its type is obd_capa in client to avoid copy.
166 * in contrary its type is lustre_capa in OSS. */
170 void lov_stripe_lock(struct lov_stripe_md *md);
171 void lov_stripe_unlock(struct lov_stripe_md *md);
174 struct list_head typ_chain;
175 struct obd_ops *typ_dt_ops;
176 struct md_ops *typ_md_ops;
177 struct dentry *typ_debugfs_entry;
180 struct lu_device_type *typ_lu;
181 spinlock_t obd_type_lock;
182 struct kobject *typ_kobj;
194 LLOG_CONFIG_ORIG_CTXT = 0,
195 LLOG_CONFIG_REPL_CTXT,
196 LLOG_MDS_OST_ORIG_CTXT,
197 LLOG_MDS_OST_REPL_CTXT,
204 LLOG_LOVEA_ORIG_CTXT,
205 LLOG_LOVEA_REPL_CTXT,
206 LLOG_CHANGELOG_ORIG_CTXT, /**< changelog generation on mdd */
207 LLOG_CHANGELOG_REPL_CTXT, /**< changelog access on clients */
208 LLOG_CHANGELOG_USER_ORIG_CTXT, /**< for multiple changelog consumers */
209 LLOG_AGENT_ORIG_CTXT, /**< agent requests generation on cdt */
213 struct timeout_item {
214 enum timeout_event ti_event;
215 unsigned long ti_timeout;
218 struct list_head ti_obd_list;
219 struct list_head ti_chain;
222 #define OSC_MAX_RIF_DEFAULT 8
223 #define MDS_OSC_MAX_RIF_DEFAULT 50
224 #define OSC_MAX_RIF_MAX 256
225 #define OSC_MAX_DIRTY_DEFAULT (OSC_MAX_RIF_DEFAULT * 4)
226 #define OSC_MAX_DIRTY_MB_MAX 2048 /* arbitrary, but < MAX_LONG bytes */
227 #define OSC_DEFAULT_RESENDS 10
229 /* possible values for fo_sync_lock_cancel */
231 NEVER_SYNC_ON_CANCEL = 0,
232 BLOCKING_SYNC_ON_CANCEL = 1,
233 ALWAYS_SYNC_ON_CANCEL = 2,
234 NUM_SYNC_ON_CANCEL_STATES
237 #define MDC_MAX_RIF_DEFAULT 8
238 #define MDC_MAX_RIF_MAX 512
243 struct rw_semaphore cl_sem;
244 struct obd_uuid cl_target_uuid;
245 struct obd_import *cl_import; /* ptlrpc connection state */
247 /* max_mds_easize is purely a performance thing so we don't have to
248 * call obd_size_diskmd() all the time. */
249 int cl_default_mds_easize;
250 int cl_max_mds_easize;
251 int cl_default_mds_cookiesize;
252 int cl_max_mds_cookiesize;
254 enum lustre_sec_part cl_sp_me;
255 enum lustre_sec_part cl_sp_to;
256 struct sptlrpc_flavor cl_flvr_mgc; /* fixed flavor of mgc->mgs */
258 /* the grant values are protected by loi_list_lock below */
259 long cl_dirty; /* all _dirty_ in bytes */
260 long cl_dirty_max; /* allowed w/o rpc */
261 long cl_dirty_transit; /* dirty synchronous */
262 long cl_avail_grant; /* bytes of credit for ost */
263 long cl_lost_grant; /* lost credits (trunc) */
265 /* since we allocate grant by blocks, we don't know how many grant will
266 * be used to add a page into cache. As a solution, we reserve maximum
267 * grant before trying to dirty a page and unreserve the rest.
268 * See osc_{reserve|unreserve}_grant for details. */
269 long cl_reserved_grant;
270 struct list_head cl_cache_waiters; /* waiting for cache/grant */
271 unsigned long cl_next_shrink_grant; /* jiffies */
272 struct list_head cl_grant_shrink_list; /* Timeout event list */
273 int cl_grant_shrink_interval; /* seconds */
275 /* A chunk is an optimal size used by osc_extent to determine
276 * the extent size. A chunk is max(PAGE_CACHE_SIZE, OST block size) */
279 int cl_extent_tax; /* extent overhead, by bytes */
281 /* keep track of objects that have lois that contain pages which
282 * have been queued for async brw. this lock also protects the
283 * lists of osc_client_pages that hang off of the loi */
285 * ->cl_loi_list_lock protects consistency of
286 * ->cl_loi_{ready,read,write}_list. ->ap_make_ready() and
287 * ->ap_completion() call-backs are executed under this lock. As we
288 * cannot guarantee that these call-backs never block on all platforms
289 * (as a matter of fact they do block on Mac OS X), type of
290 * ->cl_loi_list_lock is platform dependent: it's a spin-lock on Linux
291 * and blocking mutex on Mac OS X. (Alternative is to make this lock
292 * blocking everywhere, but we don't want to slow down fast-path of
293 * our main platform.)
295 * Exact type of ->cl_loi_list_lock is defined in arch/obd.h together
296 * with client_obd_list_{un,}lock() and
297 * client_obd_list_lock_{init,done}() functions.
299 * NB by Jinshan: though field names are still _loi_, but actually
300 * osc_object{}s are in the list.
302 client_obd_lock_t cl_loi_list_lock;
303 struct list_head cl_loi_ready_list;
304 struct list_head cl_loi_hp_ready_list;
305 struct list_head cl_loi_write_list;
306 struct list_head cl_loi_read_list;
309 /* just a sum of the loi/lop pending numbers to be exported by /proc */
310 atomic_t cl_pending_w_pages;
311 atomic_t cl_pending_r_pages;
312 __u32 cl_max_pages_per_rpc;
313 int cl_max_rpcs_in_flight;
314 struct obd_histogram cl_read_rpc_hist;
315 struct obd_histogram cl_write_rpc_hist;
316 struct obd_histogram cl_read_page_hist;
317 struct obd_histogram cl_write_page_hist;
318 struct obd_histogram cl_read_offset_hist;
319 struct obd_histogram cl_write_offset_hist;
321 /* lru for osc caching pages */
322 struct cl_client_cache *cl_cache;
323 struct list_head cl_lru_osc; /* member of cl_cache->ccc_lru */
324 atomic_t *cl_lru_left;
325 atomic_t cl_lru_busy;
326 atomic_t cl_lru_shrinkers;
327 atomic_t cl_lru_in_list;
328 struct list_head cl_lru_list; /* lru page list */
329 client_obd_lock_t cl_lru_list_lock; /* page list protector */
331 /* number of in flight destroy rpcs is limited to max_rpcs_in_flight */
332 atomic_t cl_destroy_in_flight;
333 wait_queue_head_t cl_destroy_waitq;
335 struct mdc_rpc_lock *cl_rpc_lock;
336 struct mdc_rpc_lock *cl_close_lock;
339 struct mutex cl_mgc_mutex;
340 struct local_oid_storage *cl_mgc_los;
341 struct dt_object *cl_mgc_configs_dir;
342 atomic_t cl_mgc_refcount;
343 struct obd_export *cl_mgc_mgsexp;
345 /* checksumming for data sent over the network */
346 unsigned int cl_checksum:1; /* 0 = disabled, 1 = enabled */
347 /* supported checksum types that are worked out at connect time */
348 __u32 cl_supp_cksum_types;
349 /* checksum algorithm to be used */
350 cksum_type_t cl_cksum_type;
352 /* also protected by the poorly named _loi_list_lock lock above */
353 struct osc_async_rc cl_ar;
355 /* used by quotacheck when the servers are older than 2.4 */
356 int cl_qchk_stat; /* quotacheck stat of the peer */
357 #define CL_NOT_QUOTACHECKED 1 /* client->cl_qchk_stat init value */
358 #if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 7, 50, 0)
359 #warning "please consider removing quotacheck compatibility code"
362 /* sequence manager */
363 struct lu_client_seq *cl_seq;
365 atomic_t cl_resends; /* resend count */
367 /* ptlrpc work for writeback in ptlrpcd context */
368 void *cl_writeback_work;
369 /* hash tables for osc_quota_info */
370 struct cfs_hash *cl_quota_hash[MAXQUOTAS];
372 #define obd2cli_tgt(obd) ((char *)(obd)->u.cli.cl_target_uuid.uuid)
379 struct echo_client_obd {
380 struct obd_export *ec_exp; /* the local connection to osc/lov */
382 struct list_head ec_objects;
383 struct list_head ec_locks;
388 /* Generic subset of OSTs */
390 __u32 *op_array; /* array of index of
392 unsigned int op_count; /* number of OSTs in the array */
393 unsigned int op_size; /* allocated size of lp_array */
394 struct rw_semaphore op_rw_sem; /* to protect ost_pool use */
397 /* Round-robin allocator data */
399 __u32 lqr_start_idx; /* start index of new inode */
400 __u32 lqr_offset_idx; /* aliasing for start_idx */
401 int lqr_start_count; /* reseed counter */
402 struct ost_pool lqr_pool; /* round-robin optimized list */
403 unsigned long lqr_dirty:1; /* recalc round-robin list */
406 /* allow statfs data caching for 1 second */
407 #define OBD_STATFS_CACHE_SECONDS 1
409 struct lov_statfs_data {
410 struct obd_info lsd_oi;
411 struct obd_statfs lsd_statfs;
413 /* Stripe placement optimization */
415 struct list_head lq_oss_list; /* list of OSSs that targets use */
416 struct rw_semaphore lq_rw_sem;
417 __u32 lq_active_oss_count;
418 unsigned int lq_prio_free; /* priority for free space */
419 unsigned int lq_threshold_rr;/* priority for rr */
420 struct lov_qos_rr lq_rr; /* round robin qos data */
421 unsigned long lq_dirty:1, /* recalc qos data */
422 lq_same_space:1,/* the ost's all have approx.
423 the same space avail */
424 lq_reset:1, /* zero current penalties */
425 lq_statfs_in_progress:1; /* statfs op in
427 /* qos statfs data */
428 struct lov_statfs_data *lq_statfs_data;
429 wait_queue_head_t lq_statfs_waitq; /* waitqueue to notify statfs
430 * requests completion */
433 struct lov_tgt_desc {
434 struct list_head ltd_kill;
435 struct obd_uuid ltd_uuid;
436 struct obd_device *ltd_obd;
437 struct obd_export *ltd_exp;
439 __u32 ltd_index; /* index in lov_obd->tgts */
440 unsigned long ltd_active:1,/* is this target up for requests */
441 ltd_activate:1,/* should target be activated */
442 ltd_reap:1; /* should this target be deleted */
446 #define pool_tgt_size(_p) _p->pool_obds.op_size
447 #define pool_tgt_count(_p) _p->pool_obds.op_count
448 #define pool_tgt_array(_p) _p->pool_obds.op_array
449 #define pool_tgt_rw_sem(_p) _p->pool_obds.op_rw_sem
452 char pool_name[LOV_MAXPOOLNAME + 1]; /* name of pool */
453 struct ost_pool pool_obds; /* pool members */
454 atomic_t pool_refcount; /* pool ref. counter */
455 struct lov_qos_rr pool_rr; /* round robin qos */
456 struct hlist_node pool_hash; /* access by poolname */
457 struct list_head pool_list; /* serial access */
458 struct dentry *pool_debugfs_entry; /* file in /proc */
459 struct obd_device *pool_lobd; /* obd of the lov/lod to which
460 * this pool belongs */
464 struct lov_desc desc;
465 struct lov_tgt_desc **lov_tgts; /* sparse array */
466 struct ost_pool lov_packed; /* all OSTs in a packed
468 struct mutex lov_lock;
469 struct obd_connect_data lov_ocd;
470 atomic_t lov_refcount;
471 __u32 lov_tgt_count; /* how many OBD's */
472 __u32 lov_active_tgt_count; /* how many active */
473 __u32 lov_death_row;/* tgts scheduled to be deleted */
474 __u32 lov_tgt_size; /* size of tgts array */
477 struct cfs_hash *lov_pools_hash_body; /* used for key access */
478 struct list_head lov_pool_list; /* used for sequential access */
479 struct dentry *lov_pool_debugfs_entry;
480 enum lustre_sec_part lov_sp_me;
482 /* Cached LRU pages from upper layer */
485 struct rw_semaphore lov_notify_lock;
487 struct kobject *lov_tgts_kobj;
490 struct lmv_tgt_desc {
491 struct obd_uuid ltd_uuid;
492 struct obd_export *ltd_exp;
494 struct mutex ltd_fid_mutex;
495 unsigned long ltd_active:1; /* target up for requests */
498 enum placement_policy {
499 PLACEMENT_CHAR_POLICY = 0,
500 PLACEMENT_NID_POLICY = 1,
501 PLACEMENT_INVAL_POLICY = 2,
507 struct lu_client_fld lmv_fld;
509 enum placement_policy lmv_placement;
510 struct lmv_desc desc;
511 struct obd_uuid cluuid;
512 struct obd_export *exp;
514 struct mutex init_mutex;
519 int max_def_cookiesize;
522 int tgts_size; /* size of tgts array */
523 struct lmv_tgt_desc **tgts;
525 struct obd_connect_data conn_data;
526 struct kobject *lmv_tgts_kobj;
529 struct niobuf_local {
530 __u64 lnb_file_offset;
531 __u32 lnb_page_offset;
535 struct dentry *dentry;
540 #define LUSTRE_FLD_NAME "fld"
541 #define LUSTRE_SEQ_NAME "seq"
543 #define LUSTRE_MDD_NAME "mdd"
544 #define LUSTRE_OSD_LDISKFS_NAME "osd-ldiskfs"
545 #define LUSTRE_OSD_ZFS_NAME "osd-zfs"
546 #define LUSTRE_VVP_NAME "vvp"
547 #define LUSTRE_LMV_NAME "lmv"
548 #define LUSTRE_SLP_NAME "slp"
549 #define LUSTRE_LOD_NAME "lod"
550 #define LUSTRE_OSP_NAME "osp"
551 #define LUSTRE_LWP_NAME "lwp"
553 /* obd device type names */
554 /* FIXME all the references to LUSTRE_MDS_NAME should be swapped with LUSTRE_MDT_NAME */
555 #define LUSTRE_MDS_NAME "mds"
556 #define LUSTRE_MDT_NAME "mdt"
557 #define LUSTRE_MDC_NAME "mdc"
558 #define LUSTRE_OSS_NAME "ost" /* FIXME change name to oss */
559 #define LUSTRE_OST_NAME "obdfilter" /* FIXME change name to ost */
560 #define LUSTRE_OSC_NAME "osc"
561 #define LUSTRE_LOV_NAME "lov"
562 #define LUSTRE_MGS_NAME "mgs"
563 #define LUSTRE_MGC_NAME "mgc"
565 #define LUSTRE_ECHO_NAME "obdecho"
566 #define LUSTRE_ECHO_CLIENT_NAME "echo_client"
567 #define LUSTRE_QMT_NAME "qmt"
569 /* Constant obd names (post-rename) */
570 #define LUSTRE_MDS_OBDNAME "MDS"
571 #define LUSTRE_OSS_OBDNAME "OSS"
572 #define LUSTRE_MGS_OBDNAME "MGS"
573 #define LUSTRE_MGC_OBDNAME "MGC"
575 /* Don't conflict with on-wire flags OBD_BRW_WRITE, etc */
576 #define N_LOCAL_TEMP_PAGE 0x10000000
578 struct obd_trans_info {
581 /* Only used on the server side for tracking acks. */
582 struct oti_req_ack_lock {
583 struct lustre_handle lock;
587 struct llog_cookie oti_onecookie;
588 struct llog_cookie *oti_logcookies;
590 /** synchronous write is needed */
591 unsigned long oti_sync_write:1;
593 /* initial thread handling transaction */
594 struct ptlrpc_thread *oti_thread;
597 __u64 oti_pre_version;
601 struct obd_uuid *oti_ost_uuid;
604 static inline void oti_init(struct obd_trans_info *oti,
605 struct ptlrpc_request *req)
609 memset(oti, 0, sizeof(*oti));
614 oti->oti_xid = req->rq_xid;
615 /** VBR: take versions from request */
616 if (req->rq_reqmsg != NULL &&
617 lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
618 __u64 *pre_version = lustre_msg_get_versions(req->rq_reqmsg);
620 oti->oti_pre_version = pre_version ? pre_version[0] : 0;
621 oti->oti_transno = lustre_msg_get_transno(req->rq_reqmsg);
624 /** called from mds_create_objects */
625 if (req->rq_repmsg != NULL)
626 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
627 oti->oti_thread = req->rq_svc_thread;
628 if (req->rq_reqmsg != NULL)
629 oti->oti_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
632 static inline void oti_alloc_cookies(struct obd_trans_info *oti,
638 if (num_cookies == 1)
639 oti->oti_logcookies = &oti->oti_onecookie;
641 oti->oti_logcookies = libcfs_kvzalloc(num_cookies * sizeof(oti->oti_onecookie),
644 oti->oti_numcookies = num_cookies;
647 static inline void oti_free_cookies(struct obd_trans_info *oti)
649 if (!oti || !oti->oti_logcookies)
652 if (oti->oti_logcookies == &oti->oti_onecookie)
653 LASSERT(oti->oti_numcookies == 1);
655 kvfree(oti->oti_logcookies);
657 oti->oti_logcookies = NULL;
658 oti->oti_numcookies = 0;
662 * Events signalled through obd_notify() upcall-chain.
664 enum obd_notify_event {
667 /* Device connect start */
669 /* Device activated */
671 /* Device deactivated */
673 /* Device disconnected */
675 /* Connect data for import were changed */
678 OBD_NOTIFY_SYNC_NONBLOCK,
680 /* Configuration event */
682 /* Administratively deactivate/activate event */
683 OBD_NOTIFY_DEACTIVATE,
688 * Data structure used to pass obd_notify()-event to non-obd listeners (llite
689 * and liblustre being main examples).
691 struct obd_notify_upcall {
692 int (*onu_upcall)(struct obd_device *host, struct obd_device *watched,
693 enum obd_notify_event ev, void *owner, void *data);
694 /* Opaque datum supplied by upper layer listener */
698 struct target_recovery_data {
699 svc_handler_t trd_recovery_handler;
700 pid_t trd_processing_task;
701 struct completion trd_starting;
702 struct completion trd_finishing;
705 struct obd_llog_group {
707 struct llog_ctxt *olg_ctxts[LLOG_MAX_CTXTS];
708 wait_queue_head_t olg_waitq;
710 struct mutex olg_cat_processing;
713 /* corresponds to one of the obd's */
714 #define OBD_DEVICE_MAGIC 0XAB5CD6EF
715 #define OBD_DEV_BY_DEVNAME 0xffffd0de
717 struct lvfs_run_ctxt {
718 struct dt_device *dt;
722 struct obd_type *obd_type;
725 /* common and UUID name of this device */
726 char obd_name[MAX_OBD_NAME];
727 struct obd_uuid obd_uuid;
729 struct lu_device *obd_lu_dev;
732 /* bitfield modification is protected by obd_dev_lock */
733 unsigned long obd_attached:1, /* finished attach */
734 obd_set_up:1, /* finished setup */
735 obd_recovering:1, /* there are recoverable clients */
736 obd_abort_recovery:1,/* recovery expired */
737 obd_version_recov:1, /* obd uses version checking */
738 obd_replayable:1, /* recovery is enabled; inform clients */
739 obd_no_transno:1, /* no committed-transno notification */
740 obd_no_recov:1, /* fail instead of retry messages */
741 obd_stopping:1, /* started cleanup */
742 obd_starting:1, /* started setup */
743 obd_force:1, /* cleanup with > 0 obd refcount */
744 obd_fail:1, /* cleanup with failover */
745 obd_async_recov:1, /* allow asynchronous orphan cleanup */
746 obd_no_conn:1, /* deny new connections */
747 obd_inactive:1, /* device active/inactive
748 * (for /proc/status only!!) */
749 obd_no_ir:1, /* no imperative recovery. */
750 obd_process_conf:1; /* device is processing mgs config */
751 /* use separate field as it is set in interrupt to don't mess with
752 * protection of other bits using _bh lock */
753 unsigned long obd_recovery_expired:1;
754 /* uuid-export hash body */
755 struct cfs_hash *obd_uuid_hash;
756 /* nid-export hash body */
757 struct cfs_hash *obd_nid_hash;
758 atomic_t obd_refcount;
759 wait_queue_head_t obd_refcount_waitq;
760 struct list_head obd_exports;
761 struct list_head obd_unlinked_exports;
762 struct list_head obd_delayed_exports;
764 spinlock_t obd_nid_lock;
765 struct ldlm_namespace *obd_namespace;
766 struct ptlrpc_client obd_ldlm_client; /* XXX OST/MDS only */
767 /* a spinlock is OK for what we do now, may need a semaphore later */
768 spinlock_t obd_dev_lock; /* protect OBD bitfield above */
769 struct mutex obd_dev_mutex;
770 __u64 obd_last_committed;
771 spinlock_t obd_osfs_lock;
772 struct obd_statfs obd_osfs; /* locked by obd_osfs_lock */
774 struct lvfs_run_ctxt obd_lvfs_ctxt;
775 struct obd_llog_group obd_olg; /* default llog group */
776 struct obd_device *obd_observer;
777 struct rw_semaphore obd_observer_link_sem;
778 struct obd_notify_upcall obd_upcall;
779 struct obd_export *obd_self_export;
781 int obd_max_recoverable_clients;
782 atomic_t obd_connected_clients;
783 int obd_stale_clients;
784 int obd_delayed_clients;
785 /* this lock protects all recovery list_heads, timer and
786 * obd_next_recovery_transno value */
787 spinlock_t obd_recovery_task_lock;
788 __u64 obd_next_recovery_transno;
789 int obd_replayed_requests;
790 int obd_requests_queued_for_recovery;
791 wait_queue_head_t obd_next_transno_waitq;
792 /* protected by obd_recovery_task_lock */
793 int obd_recovery_timeout;
795 /* new recovery stuff from CMD2 */
796 struct target_recovery_data obd_recovery_data;
797 int obd_replayed_locks;
798 atomic_t obd_req_replay_clients;
799 atomic_t obd_lock_replay_clients;
800 /* all lists are protected by obd_recovery_task_lock */
801 struct list_head obd_req_replay_queue;
802 struct list_head obd_lock_replay_queue;
803 struct list_head obd_final_req_queue;
804 int obd_recovery_stage;
807 struct client_obd cli;
808 struct echo_client_obd echo_client;
812 /* Fields used by LProcFS */
813 unsigned int obd_cntr_base;
814 struct lprocfs_stats *obd_stats;
816 unsigned int md_cntr_base;
817 struct lprocfs_stats *md_stats;
819 struct dentry *obd_debugfs_entry;
820 struct dentry *obd_svc_debugfs_entry;
821 struct lprocfs_stats *obd_svc_stats;
822 atomic_t obd_evict_inprogress;
823 wait_queue_head_t obd_evict_inprogress_waitq;
824 struct list_head obd_evict_list; /* protected with pet_lock */
827 * Ldlm pool part. Save last calculated SLV and Limit.
829 rwlock_t obd_pool_lock;
834 * A list of outstanding class_incref()'s against this obd. For
837 struct lu_ref obd_reference;
839 int obd_conn_inprogress;
841 struct kobject obd_kobj; /* sysfs object */
842 struct completion obd_kobj_unregister;
845 #define OBD_LLOG_FL_SENDNOW 0x0001
846 #define OBD_LLOG_FL_EXIT 0x0002
848 enum obd_cleanup_stage {
849 /* Special case hack for MDS LOVs */
851 /* can be directly mapped to .ldto_device_fini() */
855 /* get/set_info keys */
856 #define KEY_ASYNC "async"
857 #define KEY_BLOCKSIZE_BITS "blocksize_bits"
858 #define KEY_BLOCKSIZE "blocksize"
859 #define KEY_CAPA_KEY "capa_key"
860 #define KEY_CHANGELOG_CLEAR "changelog_clear"
861 #define KEY_FID2PATH "fid2path"
862 #define KEY_CHECKSUM "checksum"
863 #define KEY_CLEAR_FS "clear_fs"
864 #define KEY_CONN_DATA "conn_data"
865 #define KEY_EVICT_BY_NID "evict_by_nid"
866 #define KEY_FIEMAP "fiemap"
867 #define KEY_FLUSH_CTX "flush_ctx"
868 #define KEY_GRANT_SHRINK "grant_shrink"
869 #define KEY_HSM_COPYTOOL_SEND "hsm_send"
870 #define KEY_INIT_RECOV_BACKUP "init_recov_bk"
871 #define KEY_INIT_RECOV "initial_recov"
872 #define KEY_INTERMDS "inter_mds"
873 #define KEY_LAST_ID "last_id"
874 #define KEY_LAST_FID "last_fid"
875 #define KEY_LOCK_TO_STRIPE "lock_to_stripe"
876 #define KEY_LOVDESC "lovdesc"
877 #define KEY_LOV_IDX "lov_idx"
878 #define KEY_MAX_EASIZE "max_easize"
879 #define KEY_DEFAULT_EASIZE "default_easize"
880 #define KEY_MAX_COOKIESIZE "max_cookiesize"
881 #define KEY_DEFAULT_COOKIESIZE "default_cookiesize"
882 #define KEY_MDS_CONN "mds_conn"
883 #define KEY_MGSSEC "mgssec"
884 #define KEY_NEXT_ID "next_id"
885 #define KEY_READ_ONLY "read-only"
886 #define KEY_REGISTER_TARGET "register_target"
887 #define KEY_SET_FS "set_fs"
888 #define KEY_TGT_COUNT "tgt_count"
889 /* KEY_SET_INFO in lustre_idl.h */
890 #define KEY_SPTLRPC_CONF "sptlrpc_conf"
891 #define KEY_CONNECT_FLAG "connect_flags"
892 #define KEY_SYNC_LOCK_CANCEL "sync_lock_cancel"
894 #define KEY_CACHE_SET "cache_set"
895 #define KEY_CACHE_LRU_SHRINK "cache_lru_shrink"
896 #define KEY_CHANGELOG_INDEX "changelog_index"
900 /* /!\ must be coherent with include/linux/namei.h on patched kernel */
901 #define IT_OPEN (1 << 0)
902 #define IT_CREAT (1 << 1)
903 #define IT_READDIR (1 << 2)
904 #define IT_GETATTR (1 << 3)
905 #define IT_LOOKUP (1 << 4)
906 #define IT_UNLINK (1 << 5)
907 #define IT_TRUNC (1 << 6)
908 #define IT_GETXATTR (1 << 7)
909 #define IT_EXEC (1 << 8)
910 #define IT_PIN (1 << 9)
911 #define IT_LAYOUT (1 << 10)
912 #define IT_QUOTA_DQACQ (1 << 11)
913 #define IT_QUOTA_CONN (1 << 12)
914 #define IT_SETXATTR (1 << 13)
916 static inline int it_to_lock_mode(struct lookup_intent *it)
918 /* CREAT needs to be tested before open (both could be set) */
919 if (it->it_op & IT_CREAT)
921 else if (it->it_op & (IT_READDIR | IT_GETATTR | IT_OPEN | IT_LOOKUP |
924 else if (it->it_op & IT_GETXATTR)
926 else if (it->it_op & IT_SETXATTR)
929 LASSERTF(0, "Invalid it_op: %d\n", it->it_op);
934 struct lu_fid op_fid1; /* operation fid1 (usually parent) */
935 struct lu_fid op_fid2; /* operation fid2 (usually child) */
936 struct lu_fid op_fid3; /* 2 extra fids to find conflicting */
937 struct lu_fid op_fid4; /* to the operation locks. */
938 u32 op_mds; /* what mds server open will go to */
939 struct lustre_handle op_handle;
944 struct lmv_stripe_md *op_mea1;
945 struct lmv_stripe_md *op_mea2;
946 __u32 op_suppgids[2];
952 /* iattr fields and blocks. */
953 struct iattr op_attr;
954 unsigned int op_attr_flags;
956 loff_t op_attr_blocks;
958 /* Size-on-MDS epoch and flags. */
963 struct obd_capa *op_capa1;
964 struct obd_capa *op_capa2;
966 /* Various operation flags. */
967 enum mds_op_bias op_bias;
972 /* Used by readdir */
975 /* Used by readdir */
978 /* used to transfer info between the stacks of MD client
979 * see enum op_cli_flags */
982 /* File object data version for HSM release, on client */
983 __u64 op_data_version;
984 struct lustre_handle op_lease_handle;
988 CLI_SET_MEA = 1 << 0,
989 CLI_RM_ENTRY = 1 << 1,
992 struct md_enqueue_info;
993 /* metadata stat-ahead */
995 struct md_enqueue_info {
996 struct md_op_data mi_data;
997 struct lookup_intent mi_it;
998 struct lustre_handle mi_lockh;
999 struct inode *mi_dir;
1000 int (*mi_cb)(struct ptlrpc_request *req,
1001 struct md_enqueue_info *minfo, int rc);
1003 unsigned int mi_generation;
1007 struct module *o_owner;
1008 int (*o_iocontrol)(unsigned int cmd, struct obd_export *exp, int len,
1009 void *karg, void *uarg);
1010 int (*o_get_info)(const struct lu_env *env, struct obd_export *,
1011 __u32 keylen, void *key, __u32 *vallen, void *val,
1012 struct lov_stripe_md *lsm);
1013 int (*o_set_info_async)(const struct lu_env *, struct obd_export *,
1014 __u32 keylen, void *key,
1015 __u32 vallen, void *val,
1016 struct ptlrpc_request_set *set);
1017 int (*o_attach)(struct obd_device *dev, u32 len, void *data);
1018 int (*o_detach)(struct obd_device *dev);
1019 int (*o_setup)(struct obd_device *dev, struct lustre_cfg *cfg);
1020 int (*o_precleanup)(struct obd_device *dev,
1021 enum obd_cleanup_stage cleanup_stage);
1022 int (*o_cleanup)(struct obd_device *dev);
1023 int (*o_process_config)(struct obd_device *dev, u32 len, void *data);
1024 int (*o_postrecov)(struct obd_device *dev);
1025 int (*o_add_conn)(struct obd_import *imp, struct obd_uuid *uuid,
1027 int (*o_del_conn)(struct obd_import *imp, struct obd_uuid *uuid);
1028 /* connect to the target device with given connection
1029 * data. @ocd->ocd_connect_flags is modified to reflect flags actually
1030 * granted by the target, which are guaranteed to be a subset of flags
1031 * asked for. If @ocd == NULL, use default parameters. */
1032 int (*o_connect)(const struct lu_env *env,
1033 struct obd_export **exp, struct obd_device *src,
1034 struct obd_uuid *cluuid, struct obd_connect_data *ocd,
1036 int (*o_reconnect)(const struct lu_env *env,
1037 struct obd_export *exp, struct obd_device *src,
1038 struct obd_uuid *cluuid,
1039 struct obd_connect_data *ocd,
1041 int (*o_disconnect)(struct obd_export *exp);
1043 /* Initialize/finalize fids infrastructure. */
1044 int (*o_fid_init)(struct obd_device *obd,
1045 struct obd_export *exp, enum lu_cli_type type);
1046 int (*o_fid_fini)(struct obd_device *obd);
1048 /* Allocate new fid according to passed @hint. */
1049 int (*o_fid_alloc)(struct obd_export *exp, struct lu_fid *fid,
1050 struct md_op_data *op_data);
1053 * Object with @fid is getting deleted, we may want to do something
1056 int (*o_statfs)(const struct lu_env *, struct obd_export *exp,
1057 struct obd_statfs *osfs, __u64 max_age, __u32 flags);
1058 int (*o_statfs_async)(struct obd_export *exp, struct obd_info *oinfo,
1059 __u64 max_age, struct ptlrpc_request_set *set);
1060 int (*o_packmd)(struct obd_export *exp, struct lov_mds_md **disk_tgt,
1061 struct lov_stripe_md *mem_src);
1062 int (*o_unpackmd)(struct obd_export *exp,
1063 struct lov_stripe_md **mem_tgt,
1064 struct lov_mds_md *disk_src, int disk_len);
1065 int (*o_preallocate)(struct lustre_handle *, u32 *req, u64 *ids);
1066 /* FIXME: add fid capability support for create & destroy! */
1067 int (*o_create)(const struct lu_env *env, struct obd_export *exp,
1068 struct obdo *oa, struct lov_stripe_md **ea,
1069 struct obd_trans_info *oti);
1070 int (*o_destroy)(const struct lu_env *env, struct obd_export *exp,
1071 struct obdo *oa, struct lov_stripe_md *ea,
1072 struct obd_trans_info *oti, struct obd_export *md_exp,
1074 int (*o_setattr)(const struct lu_env *, struct obd_export *exp,
1075 struct obd_info *oinfo, struct obd_trans_info *oti);
1076 int (*o_setattr_async)(struct obd_export *exp, struct obd_info *oinfo,
1077 struct obd_trans_info *oti,
1078 struct ptlrpc_request_set *rqset);
1079 int (*o_getattr)(const struct lu_env *env, struct obd_export *exp,
1080 struct obd_info *oinfo);
1081 int (*o_getattr_async)(struct obd_export *exp, struct obd_info *oinfo,
1082 struct ptlrpc_request_set *set);
1083 int (*o_adjust_kms)(struct obd_export *exp, struct lov_stripe_md *lsm,
1084 u64 size, int shrink);
1085 int (*o_preprw)(const struct lu_env *env, int cmd,
1086 struct obd_export *exp, struct obdo *oa, int objcount,
1087 struct obd_ioobj *obj, struct niobuf_remote *remote,
1088 int *nr_pages, struct niobuf_local *local,
1089 struct obd_trans_info *oti, struct lustre_capa *capa);
1090 int (*o_commitrw)(const struct lu_env *env, int cmd,
1091 struct obd_export *exp, struct obdo *oa,
1092 int objcount, struct obd_ioobj *obj,
1093 struct niobuf_remote *remote, int pages,
1094 struct niobuf_local *local,
1095 struct obd_trans_info *oti, int rc);
1096 int (*o_find_cbdata)(struct obd_export *, struct lov_stripe_md *,
1097 ldlm_iterator_t it, void *data);
1098 int (*o_init_export)(struct obd_export *exp);
1099 int (*o_destroy_export)(struct obd_export *exp);
1101 /* metadata-only methods */
1102 int (*o_import_event)(struct obd_device *, struct obd_import *,
1103 enum obd_import_event);
1105 int (*o_notify)(struct obd_device *obd, struct obd_device *watched,
1106 enum obd_notify_event ev, void *data);
1108 int (*o_health_check)(const struct lu_env *env, struct obd_device *);
1109 struct obd_uuid *(*o_get_uuid)(struct obd_export *exp);
1112 int (*o_quotacheck)(struct obd_device *, struct obd_export *,
1113 struct obd_quotactl *);
1114 int (*o_quotactl)(struct obd_device *, struct obd_export *,
1115 struct obd_quotactl *);
1118 int (*o_pool_new)(struct obd_device *obd, char *poolname);
1119 int (*o_pool_del)(struct obd_device *obd, char *poolname);
1120 int (*o_pool_add)(struct obd_device *obd, char *poolname,
1122 int (*o_pool_rem)(struct obd_device *obd, char *poolname,
1124 void (*o_getref)(struct obd_device *obd);
1125 void (*o_putref)(struct obd_device *obd);
1127 * NOTE: If adding ops, add another LPROCFS_OBD_OP_INIT() line
1128 * to lprocfs_alloc_obd_stats() in obdclass/lprocfs_status.c.
1129 * Also, add a wrapper function in include/linux/obd_class.h. */
1133 LUSTRE_OPC_MKDIR = (1 << 0),
1134 LUSTRE_OPC_SYMLINK = (1 << 1),
1135 LUSTRE_OPC_MKNOD = (1 << 2),
1136 LUSTRE_OPC_CREATE = (1 << 3),
1137 LUSTRE_OPC_ANY = (1 << 4)
1140 /* lmv structures */
1141 #define MEA_MAGIC_LAST_CHAR 0xb2221ca1
1142 #define MEA_MAGIC_ALL_CHARS 0xb222a11c
1143 #define MEA_MAGIC_HASH_SEGMENT 0xb222a11b
1145 #define MAX_HASH_SIZE_32 0x7fffffffUL
1146 #define MAX_HASH_SIZE 0x7fffffffffffffffULL
1147 #define MAX_HASH_HIGHEST_BIT 0x1000000000000000ULL
1150 struct mdt_body *body;
1151 struct lov_stripe_md *lsm;
1152 struct lmv_stripe_md *mea;
1153 #ifdef CONFIG_FS_POSIX_ACL
1154 struct posix_acl *posix_acl;
1156 struct mdt_remote_perm *remote_perm;
1157 struct obd_capa *mds_capa;
1158 struct obd_capa *oss_capa;
1161 struct md_open_data {
1162 struct obd_client_handle *mod_och;
1163 struct ptlrpc_request *mod_open_req;
1164 struct ptlrpc_request *mod_close_req;
1165 atomic_t mod_refcount;
1169 struct lookup_intent;
1172 int (*m_getstatus)(struct obd_export *, struct lu_fid *,
1173 struct obd_capa **);
1174 int (*m_null_inode)(struct obd_export *, const struct lu_fid *);
1175 int (*m_find_cbdata)(struct obd_export *, const struct lu_fid *,
1176 ldlm_iterator_t, void *);
1177 int (*m_close)(struct obd_export *, struct md_op_data *,
1178 struct md_open_data *, struct ptlrpc_request **);
1179 int (*m_create)(struct obd_export *, struct md_op_data *,
1180 const void *, int, int, __u32, __u32, cfs_cap_t,
1181 __u64, struct ptlrpc_request **);
1182 int (*m_done_writing)(struct obd_export *, struct md_op_data *,
1183 struct md_open_data *);
1184 int (*m_enqueue)(struct obd_export *, struct ldlm_enqueue_info *,
1185 struct lookup_intent *, struct md_op_data *,
1186 struct lustre_handle *, void *, int,
1187 struct ptlrpc_request **, __u64);
1188 int (*m_getattr)(struct obd_export *, struct md_op_data *,
1189 struct ptlrpc_request **);
1190 int (*m_getattr_name)(struct obd_export *, struct md_op_data *,
1191 struct ptlrpc_request **);
1192 int (*m_intent_lock)(struct obd_export *, struct md_op_data *,
1193 void *, int, struct lookup_intent *, int,
1194 struct ptlrpc_request **,
1195 ldlm_blocking_callback, __u64);
1196 int (*m_link)(struct obd_export *, struct md_op_data *,
1197 struct ptlrpc_request **);
1198 int (*m_rename)(struct obd_export *, struct md_op_data *,
1199 const char *, int, const char *, int,
1200 struct ptlrpc_request **);
1201 int (*m_is_subdir)(struct obd_export *, const struct lu_fid *,
1202 const struct lu_fid *,
1203 struct ptlrpc_request **);
1204 int (*m_setattr)(struct obd_export *, struct md_op_data *, void *,
1205 int, void *, int, struct ptlrpc_request **,
1206 struct md_open_data **mod);
1207 int (*m_sync)(struct obd_export *, const struct lu_fid *,
1208 struct obd_capa *, struct ptlrpc_request **);
1209 int (*m_readpage)(struct obd_export *, struct md_op_data *,
1210 struct page **, struct ptlrpc_request **);
1212 int (*m_unlink)(struct obd_export *, struct md_op_data *,
1213 struct ptlrpc_request **);
1215 int (*m_setxattr)(struct obd_export *, const struct lu_fid *,
1216 struct obd_capa *, u64, const char *,
1217 const char *, int, int, int, __u32,
1218 struct ptlrpc_request **);
1220 int (*m_getxattr)(struct obd_export *, const struct lu_fid *,
1221 struct obd_capa *, u64, const char *,
1222 const char *, int, int, int,
1223 struct ptlrpc_request **);
1225 int (*m_init_ea_size)(struct obd_export *, int, int, int, int);
1227 int (*m_get_lustre_md)(struct obd_export *, struct ptlrpc_request *,
1228 struct obd_export *, struct obd_export *,
1229 struct lustre_md *);
1231 int (*m_free_lustre_md)(struct obd_export *, struct lustre_md *);
1233 int (*m_set_open_replay_data)(struct obd_export *,
1234 struct obd_client_handle *,
1235 struct lookup_intent *);
1236 int (*m_clear_open_replay_data)(struct obd_export *,
1237 struct obd_client_handle *);
1238 int (*m_set_lock_data)(struct obd_export *, __u64 *, void *, __u64 *);
1240 ldlm_mode_t (*m_lock_match)(struct obd_export *, __u64,
1241 const struct lu_fid *, ldlm_type_t,
1242 ldlm_policy_data_t *, ldlm_mode_t,
1243 struct lustre_handle *);
1245 int (*m_cancel_unused)(struct obd_export *, const struct lu_fid *,
1246 ldlm_policy_data_t *, ldlm_mode_t,
1247 ldlm_cancel_flags_t flags, void *opaque);
1248 int (*m_renew_capa)(struct obd_export *, struct obd_capa *oc,
1249 renew_capa_cb_t cb);
1250 int (*m_unpack_capa)(struct obd_export *, struct ptlrpc_request *,
1251 const struct req_msg_field *, struct obd_capa **);
1253 int (*m_get_remote_perm)(struct obd_export *, const struct lu_fid *,
1254 struct obd_capa *, __u32,
1255 struct ptlrpc_request **);
1257 int (*m_intent_getattr_async)(struct obd_export *,
1258 struct md_enqueue_info *,
1259 struct ldlm_enqueue_info *);
1261 int (*m_revalidate_lock)(struct obd_export *, struct lookup_intent *,
1262 struct lu_fid *, __u64 *bits);
1265 * NOTE: If adding ops, add another LPROCFS_MD_OP_INIT() line to
1266 * lprocfs_alloc_md_stats() in obdclass/lprocfs_status.c. Also, add a
1267 * wrapper function in include/linux/obd_class.h.
1271 struct lsm_operations {
1272 void (*lsm_free)(struct lov_stripe_md *);
1273 int (*lsm_destroy)(struct lov_stripe_md *, struct obdo *oa,
1274 struct obd_export *md_exp);
1275 void (*lsm_stripe_by_index)(struct lov_stripe_md *, int *, u64 *,
1277 void (*lsm_stripe_by_offset)(struct lov_stripe_md *, int *, u64 *,
1279 int (*lsm_lmm_verify)(struct lov_mds_md *lmm, int lmm_bytes,
1280 __u16 *stripe_count);
1281 int (*lsm_unpackmd)(struct lov_obd *lov, struct lov_stripe_md *lsm,
1282 struct lov_mds_md *lmm);
1285 extern const struct lsm_operations lsm_v1_ops;
1286 extern const struct lsm_operations lsm_v3_ops;
1287 static inline const struct lsm_operations *lsm_op_find(int magic)
1295 CERROR("Cannot recognize lsm_magic %08x\n", magic);
1300 /* Requests for obd_extent_calc() */
1301 #define OBD_CALC_STRIPE_START 1
1302 #define OBD_CALC_STRIPE_END 2
1304 static inline struct lustre_capa *oinfo_capa(struct obd_info *oinfo)
1306 return oinfo->oi_capa;
1309 static inline struct md_open_data *obd_mod_alloc(void)
1311 struct md_open_data *mod;
1313 mod = kzalloc(sizeof(*mod), GFP_NOFS);
1316 atomic_set(&mod->mod_refcount, 1);
1320 #define obd_mod_get(mod) atomic_inc(&(mod)->mod_refcount)
1321 #define obd_mod_put(mod) \
1323 if (atomic_dec_and_test(&(mod)->mod_refcount)) { \
1324 if ((mod)->mod_open_req) \
1325 ptlrpc_req_finished((mod)->mod_open_req); \
1330 void obdo_from_inode(struct obdo *dst, struct inode *src, u32 valid);
1331 void obdo_set_parent_fid(struct obdo *dst, const struct lu_fid *parent);
1333 /* return 1 if client should be resend request */
1334 static inline int client_should_resend(int resend, struct client_obd *cli)
1336 return atomic_read(&cli->cl_resends) ?
1337 atomic_read(&cli->cl_resends) > resend : 1;
1341 * Return device name for this device
1343 * XXX: lu_device is declared before obd_device, while a pointer pointing
1344 * back to obd_device in lu_device, so this helper function defines here
1345 * instead of in lu_object.h
1347 static inline const char *lu_dev_name(const struct lu_device *lu_dev)
1349 return lu_dev->ld_obd->obd_name;
1352 static inline bool filename_is_volatile(const char *name, int namelen, int *idx)
1357 if (strncmp(name, LUSTRE_VOLATILE_HDR, LUSTRE_VOLATILE_HDR_LEN) != 0)
1360 /* caller does not care of idx */
1364 /* volatile file, the MDT can be set from name */
1365 /* name format is LUSTRE_VOLATILE_HDR:[idx]: */
1366 /* if no MDT is specified, use std way */
1367 if (namelen < LUSTRE_VOLATILE_HDR_LEN + 2)
1369 /* test for no MDT idx case */
1370 if ((*(name + LUSTRE_VOLATILE_HDR_LEN) == ':') &&
1371 (*(name + LUSTRE_VOLATILE_HDR_LEN + 1) == ':')) {
1375 /* we have an idx, read it */
1376 start = name + LUSTRE_VOLATILE_HDR_LEN + 1;
1377 *idx = simple_strtoul(start, &end, 0);
1379 * no digit, no trailing :, negative value
1381 if (((*idx == 0) && (end == start)) ||
1382 (*end != ':') || (*idx < 0))
1387 /* bad format of mdt idx, we cannot return an error
1388 * to caller so we use hash algo */
1389 CERROR("Bad volatile file name format: %s\n",
1390 name + LUSTRE_VOLATILE_HDR_LEN);
1394 static inline int cli_brw_size(struct obd_device *obd)
1396 LASSERT(obd != NULL);
1397 return obd->u.cli.cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
1400 #endif /* __OBD_H */