lustre/include/linux/obd.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4
   5 #ifndef __OBD_H
   6 #define __OBD_H
   7
   8 #define IOC_OSC_TYPE         'h'
   9 #define IOC_OSC_MIN_NR       20
  10 #define IOC_OSC_SET_ACTIVE   _IOWR(IOC_OSC_TYPE, 21, struct obd_device *)
  11 #define IOC_OSC_MAX_NR       50
  12
  13 #define IOC_MDC_TYPE         'i'
  14 #define IOC_MDC_MIN_NR       20
  15 #define IOC_MDC_LOOKUP       _IOWR(IOC_MDC_TYPE, 20, struct obd_device *)
  16 /* Moved to lustre_user.h
  17 #define IOC_MDC_GETSTRIPE    _IOWR(IOC_MDC_TYPE, 21, struct lov_mds_md *) */
  18 #define IOC_MDC_MAX_NR       50
  19
  20 #ifdef __KERNEL__
  21 # include <linux/fs.h>
  22 # include <linux/list.h>
  23 # include <linux/sched.h> /* for struct task_struct, for current.h */
  24 # include <asm/current.h> /* for smp_lock.h */
  25 # include <linux/smp_lock.h>
  26 # include <linux/proc_fs.h>
  27 # include <linux/mount.h>
  28 #endif
  29
  30 #include <linux/lustre_lib.h>
  31 #include <linux/lustre_idl.h>
  32 #include <linux/lustre_export.h>
  33 #include <linux/lustre_quota.h>
  34
  35 /* this is really local to the OSC */
  36 struct loi_oap_pages {
  37         struct list_head        lop_pending;
  38         int                     lop_num_pending;
  39         struct list_head        lop_urgent;
  40         struct list_head        lop_pending_group;
  41 };
  42
  43 struct osc_async_rc {
  44         int     ar_rc;
  45         int     ar_force_sync;
  46         int     ar_min_xid;
  47 };
  48
  49 struct lov_oinfo {                 /* per-stripe data structure */
  50         __u64 loi_id;              /* object ID on the target OST */
  51         __u64 loi_gr;              /* object group on the target OST */
  52         int loi_ost_idx;           /* OST stripe index in lov_tgt_desc->tgts */
  53         int loi_ost_gen;           /* generation of this loi_ost_idx */
  54
  55         /* used by the osc to keep track of what objects to build into rpcs */
  56         struct loi_oap_pages loi_read_lop;
  57         struct loi_oap_pages loi_write_lop;
  58         /* _cli_ is poorly named, it should be _ready_ */
  59         struct list_head loi_cli_item;
  60         struct list_head loi_write_item;
  61         struct list_head loi_read_item;
  62
  63         unsigned loi_kms_valid:1;
  64         __u64 loi_kms;             /* known minimum size */
  65         __u64 loi_rss;             /* recently seen size */
  66         __u64 loi_mtime;           /* recently seen mtime */
  67         __u64 loi_blocks;          /* recently seen blocks */
  68
  69         struct osc_async_rc     loi_ar;
  70 };
  71
  72 static inline void loi_init(struct lov_oinfo *loi)
  73 {
  74         INIT_LIST_HEAD(&loi->loi_read_lop.lop_pending);
  75         INIT_LIST_HEAD(&loi->loi_read_lop.lop_urgent);
  76         INIT_LIST_HEAD(&loi->loi_read_lop.lop_pending_group);
  77         INIT_LIST_HEAD(&loi->loi_write_lop.lop_pending);
  78         INIT_LIST_HEAD(&loi->loi_write_lop.lop_urgent);
  79         INIT_LIST_HEAD(&loi->loi_write_lop.lop_pending_group);
  80         INIT_LIST_HEAD(&loi->loi_cli_item);
  81         INIT_LIST_HEAD(&loi->loi_write_item);
  82         INIT_LIST_HEAD(&loi->loi_read_item);
  83 }
  84
  85 struct lov_stripe_md {
  86         /* Public members. */
  87         __u64 lsm_object_id;        /* lov object id */
  88         __u64 lsm_object_gr;        /* lov object id */
  89         __u64 lsm_maxbytes;         /* maximum possible file size */
  90         unsigned long lsm_xfersize; /* optimal transfer size */
  91
  92         /* LOV-private members start here -- only for use in lov/. */
  93         __u32 lsm_magic;
  94         __u32 lsm_stripe_size;      /* size of the stripe */
  95         __u32 lsm_pattern;          /* striping pattern (RAID0, RAID1) */
  96         unsigned lsm_stripe_count;  /* number of objects being striped over */
  97         struct lov_oinfo lsm_oinfo[0];
  98 };
  99
 100 struct obd_type {
 101         struct list_head typ_chain;
 102         struct obd_ops *typ_ops;
 103         struct proc_dir_entry *typ_procroot;
 104         char *typ_name;
 105         int  typ_refcnt;
 106 };
 107
 108 struct brw_page {
 109         obd_off  off;
 110         struct page *pg;
 111         int count;
 112         obd_flag flag;
 113 };
 114
 115 enum async_flags {
 116         ASYNC_READY = 0x1, /* ap_make_ready will not be called before this
 117                               page is added to an rpc */
 118         ASYNC_URGENT = 0x2,
 119         ASYNC_COUNT_STABLE = 0x4, /* ap_refresh_count will not be called
 120                                      to give the caller a chance to update
 121                                      or cancel the size of the io */
 122         ASYNC_GROUP_SYNC = 0x8,  /* ap_completion will not be called, instead
 123                                     the page is accounted for in the
 124                                     obd_io_group given to
 125                                     obd_queue_group_io */
 126 };
 127
 128 struct obd_async_page_ops {
 129         int  (*ap_make_ready)(void *data, int cmd);
 130         int  (*ap_refresh_count)(void *data, int cmd);
 131         void (*ap_fill_obdo)(void *data, int cmd, struct obdo *oa);
 132         void (*ap_completion)(void *data, int cmd, struct obdo *oa, int rc);
 133         void (*ap_get_ucred)(void *data, struct lvfs_ucred *ouc);
 134 };
 135
 136 /* the `oig' is passed down from a caller of obd rw methods.  the callee
 137  * records enough state such that the caller can sleep on the oig and
 138  * be woken when all the callees have finished their work */
 139 struct obd_io_group {
 140         spinlock_t      oig_lock;
 141         atomic_t        oig_refcount;
 142         int             oig_pending;
 143         int             oig_rc;
 144         struct list_head oig_occ_list;
 145         wait_queue_head_t oig_waitq;
 146 };
 147
 148 /* the oig callback context lets the callee of obd rw methods register
 149  * for callbacks from the caller. */
 150 struct oig_callback_context {
 151         struct list_head occ_oig_item;
 152         /* called when the caller has received a signal while sleeping.
 153          * callees of this method are encouraged to abort their state
 154          * in the oig.  This may be called multiple times. */
 155         void (*occ_interrupted)(struct oig_callback_context *occ);
 156         unsigned int interrupted:1;
 157 };
 158
 159 /* if we find more consumers this could be generalized */
 160 #define OBD_HIST_MAX 32
 161 struct obd_histogram {
 162         spinlock_t      oh_lock;
 163         unsigned long   oh_buckets[OBD_HIST_MAX];
 164 };
 165
 166 /* Individual type definitions */
 167
 168 struct ost_server_data;
 169
 170 struct filter_obd {
 171         const char          *fo_fstype;
 172         struct super_block  *fo_sb;
 173         struct vfsmount     *fo_vfsmnt;
 174         struct dentry       *fo_dentry_O;
 175         struct dentry      **fo_dentry_O_groups;
 176         struct dentry      **fo_dentry_O_sub;
 177         spinlock_t           fo_objidlock; /* protect fo_lastobjid increment */
 178         spinlock_t           fo_translock; /* protect fsd_last_rcvd increment */
 179         struct file         *fo_rcvd_filp;
 180         struct lr_server_data *fo_fsd;
 181         unsigned long       *fo_last_rcvd_slots;
 182         __u64                fo_mount_count;
 183
 184         unsigned int         fo_destroy_in_progress:1;
 185         struct semaphore     fo_create_lock;
 186
 187         struct file_operations *fo_fop;
 188         struct inode_operations *fo_iop;
 189         struct address_space_operations *fo_aops;
 190
 191         struct list_head     fo_export_list;
 192         int                  fo_subdir_count;
 193
 194         obd_size             fo_tot_dirty;      /* protected by obd_osfs_lock */
 195         obd_size             fo_tot_granted;    /* all values in bytes */
 196         obd_size             fo_tot_pending;
 197
 198         obd_size             fo_readcache_max_filesize;
 199
 200         struct obd_import   *fo_mdc_imp;
 201         struct obd_uuid      fo_mdc_uuid;
 202         struct lustre_handle fo_mdc_conn;
 203 #if 0
 204         struct ptlrpc_client fo_mdc_client;
 205 #endif
 206         struct file        **fo_last_objid_files;
 207         __u64               *fo_last_objids; /* last created objid for groups */
 208
 209         struct semaphore     fo_alloc_lock;
 210
 211         spinlock_t fo_stats_lock;
 212         int fo_r_in_flight; /* protected by fo_stats_lock */
 213         int fo_w_in_flight; /* protected by fo_stats_lock */
 214
 215         struct obd_histogram     fo_r_pages;
 216         struct obd_histogram     fo_w_pages;
 217         struct obd_histogram     fo_read_rpc_hist;
 218         struct obd_histogram     fo_write_rpc_hist;
 219         struct obd_histogram     fo_r_io_time;
 220         struct obd_histogram     fo_w_io_time;
 221         struct obd_histogram     fo_r_discont_pages;
 222         struct obd_histogram     fo_w_discont_pages;
 223         struct obd_histogram     fo_r_discont_blocks;
 224         struct obd_histogram     fo_w_discont_blocks;
 225         struct obd_histogram     fo_r_disk_iosize;
 226         struct obd_histogram     fo_w_disk_iosize;
 227
 228         struct lustre_quota_ctxt fo_quota_ctxt;
 229         spinlock_t               fo_quotacheck_lock;
 230         atomic_t                 fo_quotachecking;
 231 };
 232
 233 struct mds_server_data;
 234
 235 #define OSC_MAX_RIF_DEFAULT       8
 236 #define OSC_MAX_RIF_MAX          64
 237 #define OSC_MAX_DIRTY_DEFAULT    32
 238 #define OSC_MAX_DIRTY_MB_MAX    512     /* totally arbitrary */
 239
 240 enum {
 241         CL_QUOTACHECKING = 1,
 242         CL_NO_QUOTACHECK
 243 };
 244
 245 struct mdc_rpc_lock;
 246 struct client_obd {
 247         struct obd_import       *cl_import;
 248         struct semaphore         cl_sem;
 249         int                      cl_conn_count;
 250         /* max_mds_easize is purely a performance thing so we don't have to
 251          * call obd_size_diskmd() all the time. */
 252         int                      cl_default_mds_easize;
 253         int                      cl_max_mds_easize;
 254         int                      cl_max_mds_cookiesize;
 255         kdev_t                   cl_sandev;
 256
 257         //struct llog_canceld_ctxt *cl_llcd; /* it's included by obd_llog_ctxt */
 258         void                    *cl_llcd_offset;
 259
 260         struct obd_device       *cl_mgmtcli_obd;
 261
 262         /* the grant values are protected by loi_list_lock below */
 263         long                     cl_dirty;         /* all _dirty_ in bytes */
 264         long                     cl_dirty_max;     /* allowed w/o rpc */
 265         long                     cl_avail_grant;   /* bytes of credit for ost */
 266         long                     cl_lost_grant;    /* lost credits (trunc) */
 267         struct list_head         cl_cache_waiters; /* waiting for cache/grant */
 268
 269         /* keep track of objects that have lois that contain pages which
 270          * have been queued for async brw.  this lock also protects the
 271          * lists of osc_client_pages that hang off of the loi */
 272         spinlock_t               cl_loi_list_lock;
 273         struct list_head         cl_loi_ready_list;
 274         struct list_head         cl_loi_write_list;
 275         struct list_head         cl_loi_read_list;
 276         int                      cl_r_in_flight;
 277         int                      cl_w_in_flight;
 278         /* just a sum of the loi/lop pending numbers to be exported by /proc */
 279         int                      cl_pending_w_pages;
 280         int                      cl_pending_r_pages;
 281         int                      cl_max_pages_per_rpc;
 282         int                      cl_max_rpcs_in_flight;
 283         struct obd_histogram     cl_read_rpc_hist;
 284         struct obd_histogram     cl_write_rpc_hist;
 285         struct obd_histogram     cl_read_page_hist;
 286         struct obd_histogram     cl_write_page_hist;
 287         struct obd_histogram     cl_read_offset_hist;
 288         struct obd_histogram     cl_write_offset_hist;
 289
 290         struct mdc_rpc_lock     *cl_rpc_lock;
 291         struct mdc_rpc_lock     *cl_setattr_lock;
 292         struct osc_creator       cl_oscc;
 293
 294         /* Flags section */
 295         unsigned int             cl_checksum:1; /* debug checksums */
 296
 297         /* also protected by the poorly named _loi_list_lock lock above */
 298         struct osc_async_rc      cl_ar;
 299
 300         /* used by quotacheck */
 301         spinlock_t               cl_qchk_lock;
 302         int                      cl_qchk_stat; /* quotacheck stat of the peer */
 303 };
 304
 305 /* Like a client, with some hangers-on.  Keep mc_client_obd first so that we
 306  * can reuse the various client setup/connect functions. */
 307 struct mgmtcli_obd {
 308         struct client_obd        mc_client_obd; /* nested */
 309         struct ptlrpc_thread    *mc_ping_thread;
 310         struct obd_export       *mc_ping_exp; /* XXX single-target */
 311         struct list_head         mc_registered;
 312         void                    *mc_hammer;
 313 };
 314
 315 #define mc_import mc_client_obd.cl_import
 316
 317 struct mds_obd {
 318         struct ptlrpc_service           *mds_service;
 319         struct ptlrpc_service           *mds_setattr_service;
 320         struct ptlrpc_service           *mds_readpage_service;
 321         struct super_block              *mds_sb;
 322         struct vfsmount                 *mds_vfsmnt;
 323         struct dentry                   *mds_fid_de;
 324         int                              mds_max_mdsize;
 325         int                              mds_max_cookiesize;
 326         struct file                     *mds_rcvd_filp;
 327         spinlock_t                       mds_transno_lock;
 328         __u64                            mds_last_transno;
 329         __u64                            mds_mount_count;
 330         __u64                            mds_io_epoch;
 331         struct semaphore                 mds_epoch_sem;
 332         struct ll_fid                    mds_rootfid;
 333         struct mds_server_data          *mds_server_data;
 334         struct dentry                   *mds_pending_dir;
 335         struct dentry                   *mds_logs_dir;
 336         struct dentry                   *mds_objects_dir;
 337         struct llog_handle              *mds_cfg_llh;
 338 //        struct llog_handle              *mds_catalog;
 339         struct obd_device               *mds_osc_obd; /* XXX lov_obd */
 340         struct obd_uuid                  mds_lov_uuid;
 341         char                            *mds_profile;
 342         struct obd_export               *mds_osc_exp; /* XXX lov_exp */
 343         int                              mds_has_lov_desc;
 344         struct lov_desc                  mds_lov_desc;
 345         obd_id                          *mds_lov_objids;
 346         int                              mds_lov_objids_valid;
 347         int                              mds_lov_nextid_set;
 348         struct file                     *mds_lov_objid_filp;
 349         unsigned long                   *mds_client_bitmap;
 350         struct semaphore                 mds_orphan_recovery_sem;
 351         struct lustre_quota_info         mds_quota_info;
 352         struct lustre_quota_ctxt         mds_quota_ctxt;
 353         atomic_t                         mds_quotachecking;
 354 };
 355
 356 struct echo_obd {
 357         struct obdo          eo_oa;
 358         spinlock_t           eo_lock;
 359         __u64                eo_lastino;
 360         struct lustre_handle eo_nl_lock;
 361         atomic_t             eo_prep;
 362 };
 363
 364 /*
 365  * this struct does double-duty acting as either a client or
 366  * server instance .. maybe not wise.
 367  */
 368 struct ptlbd_obd {
 369         /* server's */
 370         struct ptlrpc_service *ptlbd_service;
 371         struct file *filp;
 372         /* client's */
 373         struct ptlrpc_client    bd_client;
 374         struct obd_import       *bd_import;
 375         struct obd_uuid         bd_server_uuid;
 376         struct obd_export       *bd_exp;
 377         int refcount; /* XXX sigh */
 378 };
 379
 380 struct recovd_obd {
 381         spinlock_t            recovd_lock;
 382         struct list_head      recovd_managed_items; /* items managed  */
 383         struct list_head      recovd_troubled_items; /* items in recovery */
 384
 385         wait_queue_head_t     recovd_recovery_waitq;
 386         wait_queue_head_t     recovd_ctl_waitq;
 387         wait_queue_head_t     recovd_waitq;
 388         struct task_struct   *recovd_thread;
 389         __u32                 recovd_state;
 390 };
 391
 392 struct ost_obd {
 393         struct ptlrpc_service *ost_service;
 394         struct ptlrpc_service *ost_create_service;
 395 };
 396
 397 struct echo_client_obd {
 398         struct obd_export   *ec_exp;   /* the local connection to osc/lov */
 399         spinlock_t           ec_lock;
 400         struct list_head     ec_objects;
 401         int                  ec_nstripes;
 402         __u64                ec_unique;
 403 };
 404
 405 struct cache_obd {
 406         struct obd_export *cobd_target_exp;/* local connection to target obd */
 407         struct obd_export *cobd_cache_exp; /* local connection to cache obd */
 408 };
 409
 410 struct lov_tgt_desc {
 411         struct obd_uuid          uuid;
 412         __u32                    ltd_gen;
 413         struct obd_export       *ltd_exp;
 414         int                      active; /* is this target up for requests */
 415 };
 416
 417 struct lov_obd {
 418         spinlock_t lov_lock;
 419         struct lov_desc desc;
 420         int bufsize;
 421         int refcount;
 422         unsigned int lo_catalog_loaded:1;
 423         struct lov_tgt_desc *tgts;
 424 };
 425
 426 struct niobuf_local {
 427         __u64 offset;
 428         __u32 len;
 429         __u32 flags;
 430         struct page *page;
 431         struct dentry *dentry;
 432         int lnb_grant_used;
 433         int rc;
 434 };
 435
 436
 437 /* Don't conflict with on-wire flags OBD_BRW_WRITE, etc */
 438 #define N_LOCAL_TEMP_PAGE 0x10000000
 439
 440 struct obd_trans_info {
 441         __u64                    oti_transno;
 442         __u64                   *oti_objid;
 443         /* Only used on the server side for tracking acks. */
 444         struct oti_req_ack_lock {
 445                 struct lustre_handle lock;
 446                 __u32                mode;
 447         }                        oti_ack_locks[4];
 448         void                    *oti_handle;
 449         struct llog_cookie       oti_onecookie;
 450         struct llog_cookie      *oti_logcookies;
 451         int                      oti_numcookies;
 452 };
 453
 454 static inline void oti_alloc_cookies(struct obd_trans_info *oti,int num_cookies)
 455 {
 456         if (!oti)
 457                 return;
 458
 459         if (num_cookies == 1)
 460                 oti->oti_logcookies = &oti->oti_onecookie;
 461         else
 462                 OBD_ALLOC(oti->oti_logcookies,
 463                           num_cookies * sizeof(oti->oti_onecookie));
 464
 465         oti->oti_numcookies = num_cookies;
 466 }
 467
 468 static inline void oti_free_cookies(struct obd_trans_info *oti)
 469 {
 470         if (!oti || !oti->oti_logcookies)
 471                 return;
 472
 473         if (oti->oti_logcookies == &oti->oti_onecookie)
 474                 LASSERT(oti->oti_numcookies == 1);
 475         else
 476                 OBD_FREE(oti->oti_logcookies,
 477                          oti->oti_numcookies * sizeof(oti->oti_onecookie));
 478         oti->oti_logcookies = NULL;
 479         oti->oti_numcookies = 0;
 480 }
 481
 482 /* llog contexts */
 483 enum llog_ctxt_id {
 484         LLOG_CONFIG_ORIG_CTXT  =  0,
 485         LLOG_CONFIG_REPL_CTXT  =  1,
 486         LLOG_MDS_OST_ORIG_CTXT =  2,
 487         LLOG_MDS_OST_REPL_CTXT =  3,
 488         LLOG_SIZE_ORIG_CTXT    =  4,
 489         LLOG_SIZE_REPL_CTXT    =  5,
 490         LLOG_MD_ORIG_CTXT      =  6,
 491         LLOG_MD_REPL_CTXT      =  7,
 492         LLOG_RD1_ORIG_CTXT     =  8,
 493         LLOG_RD1_REPL_CTXT     =  9,
 494         LLOG_TEST_ORIG_CTXT    = 10,
 495         LLOG_TEST_REPL_CTXT    = 11,
 496         LLOG_MAX_CTXTS
 497 };
 498
 499
 500 /* corresponds to one of the obd's */
 501 struct obd_device {
 502         struct obd_type        *obd_type;
 503
 504         /* common and UUID name of this device */
 505         char                   *obd_name;
 506         struct obd_uuid         obd_uuid;
 507         struct obd_uuid         obd_grp_uuid;    /* for manual cleanup */
 508
 509         int                     obd_minor;
 510         unsigned int obd_attached:1, obd_set_up:1, obd_recovering:1,
 511                 obd_abort_recovery:1, obd_replayable:1, obd_no_transno:1,
 512                 obd_no_recov:1, obd_stopping:1, obd_starting:1,
 513                 obd_force:1, obd_fail:1;
 514         atomic_t                obd_refcount;
 515         wait_queue_head_t       obd_refcount_waitq;
 516         struct proc_dir_entry  *obd_proc_entry;
 517         struct list_head        obd_exports;
 518         int                     obd_num_exports;
 519         struct ldlm_namespace  *obd_namespace;
 520         struct ptlrpc_client    obd_ldlm_client; /* XXX OST/MDS only */
 521         /* a spinlock is OK for what we do now, may need a semaphore later */
 522         spinlock_t              obd_dev_lock;
 523         __u64                   obd_last_committed;
 524         struct fsfilt_operations *obd_fsops;
 525         spinlock_t              obd_osfs_lock;
 526         struct obd_statfs       obd_osfs;
 527         unsigned long           obd_osfs_age;    /* jiffies */
 528         struct lvfs_run_ctxt    obd_lvfs_ctxt;
 529         struct llog_ctxt       *obd_llog_ctxt[LLOG_MAX_CTXTS];
 530         struct obd_device      *obd_observer;
 531         struct obd_export      *obd_self_export;
 532         struct list_head        obd_exports_timed;  /* for ping evictor */
 533         time_t                  obd_eviction_timer; /* for ping evictor */
 534
 535         /* XXX encapsulate all this recovery data into one struct */
 536         svc_handler_t                    obd_recovery_handler;
 537         int                              obd_max_recoverable_clients;
 538         int                              obd_connected_clients;
 539         int                              obd_recoverable_clients;
 540         spinlock_t                       obd_processing_task_lock;
 541         pid_t                            obd_processing_task;
 542         __u64                            obd_next_recovery_transno;
 543         int                              obd_replayed_requests;
 544         int                              obd_requests_queued_for_recovery;
 545         wait_queue_head_t                obd_next_transno_waitq;
 546         struct list_head                 obd_uncommitted_replies;
 547         spinlock_t                       obd_uncommitted_replies_lock;
 548         struct timer_list                obd_recovery_timer;
 549         struct list_head                 obd_recovery_queue;
 550         struct list_head                 obd_delayed_reply_queue;
 551         time_t                           obd_recovery_start;
 552         time_t                           obd_recovery_end;
 553
 554         union {
 555                 struct filter_obd filter;
 556                 struct mds_obd mds;
 557                 struct client_obd cli;
 558                 struct ost_obd ost;
 559                 struct echo_client_obd echo_client;
 560                 struct echo_obd echo;
 561                 struct recovd_obd recovd;
 562                 struct lov_obd lov;
 563                 struct cache_obd cobd;
 564                 struct ptlbd_obd ptlbd;
 565                 struct mgmtcli_obd mgmtcli;
 566         } u;
 567        /* Fields used by LProcFS */
 568         unsigned int           obd_cntr_base;
 569         struct lprocfs_stats  *obd_stats;
 570         struct proc_dir_entry *obd_svc_procroot;
 571         struct lprocfs_stats  *obd_svc_stats;
 572 };
 573
 574 #define OBD_OPT_FORCE           0x0001
 575 #define OBD_OPT_FAILOVER        0x0002
 576
 577 #define OBD_LLOG_FL_SENDNOW     0x0001
 578
 579 struct obd_ops {
 580         struct module *o_owner;
 581         int (*o_iocontrol)(unsigned int cmd, struct obd_export *exp, int len,
 582                            void *karg, void *uarg);
 583         int (*o_get_info)(struct obd_export *, __u32 keylen, void *key,
 584                           __u32 *vallen, void *val);
 585         int (*o_set_info)(struct obd_export *, __u32 keylen, void *key,
 586                           __u32 vallen, void *val);
 587         int (*o_attach)(struct obd_device *dev, obd_count len, void *data);
 588         int (*o_detach)(struct obd_device *dev);
 589         int (*o_setup) (struct obd_device *dev, obd_count len, void *data);
 590         int (*o_precleanup)(struct obd_device *dev, int cleanup_stage);
 591         int (*o_cleanup)(struct obd_device *dev);
 592         int (*o_process_config)(struct obd_device *dev, obd_count len,
 593                                 void *data);
 594         int (*o_postrecov)(struct obd_device *dev);
 595         int (*o_add_conn)(struct obd_import *imp, struct obd_uuid *uuid,
 596                           int priority);
 597         int (*o_del_conn)(struct obd_import *imp, struct obd_uuid *uuid);
 598         int (*o_connect)(struct lustre_handle *conn, struct obd_device *src,
 599                          struct obd_uuid *cluuid, struct obd_connect_data *);
 600         int (*o_disconnect)(struct obd_export *exp);
 601
 602         int (*o_statfs)(struct obd_device *obd, struct obd_statfs *osfs,
 603                         unsigned long max_age);
 604         int (*o_packmd)(struct obd_export *exp, struct lov_mds_md **disk_tgt,
 605                         struct lov_stripe_md *mem_src);
 606         int (*o_unpackmd)(struct obd_export *exp,struct lov_stripe_md **mem_tgt,
 607                           struct lov_mds_md *disk_src, int disk_len);
 608         int (*o_preallocate)(struct lustre_handle *, obd_count *req,
 609                              obd_id *ids);
 610         int (*o_create)(struct obd_export *exp,  struct obdo *oa,
 611                         struct lov_stripe_md **ea, struct obd_trans_info *oti);
 612         int (*o_destroy)(struct obd_export *exp, struct obdo *oa,
 613                          struct lov_stripe_md *ea, struct obd_trans_info *oti);
 614         int (*o_setattr)(struct obd_export *exp, struct obdo *oa,
 615                          struct lov_stripe_md *ea, struct obd_trans_info *oti);
 616         int (*o_setattr_async)(struct obd_export *exp, struct obdo *oa,
 617                          struct lov_stripe_md *ea, struct obd_trans_info *oti);
 618         int (*o_getattr)(struct obd_export *exp, struct obdo *oa,
 619                          struct lov_stripe_md *ea);
 620         int (*o_getattr_async)(struct obd_export *exp, struct obdo *oa,
 621                                struct lov_stripe_md *ea,
 622                                struct ptlrpc_request_set *set);
 623         int (*o_brw)(int rw, struct obd_export *exp, struct obdo *oa,
 624                      struct lov_stripe_md *ea, obd_count oa_bufs,
 625                      struct brw_page *pgarr, struct obd_trans_info *oti);
 626         int (*o_brw_async)(int rw, struct obd_export *exp, struct obdo *oa,
 627                            struct lov_stripe_md *ea, obd_count oa_bufs,
 628                            struct brw_page *pgarr, struct ptlrpc_request_set *,
 629                            struct obd_trans_info *oti);
 630         int (*o_prep_async_page)(struct obd_export *exp,
 631                                  struct lov_stripe_md *lsm,
 632                                  struct lov_oinfo *loi,
 633                                  struct page *page, obd_off offset,
 634                                  struct obd_async_page_ops *ops, void *data,
 635                                  void **res);
 636         int (*o_queue_async_io)(struct obd_export *exp,
 637                                 struct lov_stripe_md *lsm,
 638                                 struct lov_oinfo *loi, void *cookie,
 639                                 int cmd, obd_off off, int count,
 640                                 obd_flag brw_flags, obd_flag async_flags);
 641         int (*o_queue_group_io)(struct obd_export *exp,
 642                                 struct lov_stripe_md *lsm,
 643                                 struct lov_oinfo *loi,
 644                                 struct obd_io_group *oig,
 645                                 void *cookie, int cmd, obd_off off, int count,
 646                                 obd_flag brw_flags, obd_flag async_flags);
 647         int (*o_trigger_group_io)(struct obd_export *exp,
 648                                   struct lov_stripe_md *lsm,
 649                                   struct lov_oinfo *loi,
 650                                   struct obd_io_group *oig);
 651         int (*o_set_async_flags)(struct obd_export *exp,
 652                                 struct lov_stripe_md *lsm,
 653                                 struct lov_oinfo *loi, void *cookie,
 654                                 obd_flag async_flags);
 655         int (*o_teardown_async_page)(struct obd_export *exp,
 656                                      struct lov_stripe_md *lsm,
 657                                      struct lov_oinfo *loi, void *cookie);
 658         int (*o_adjust_kms)(struct obd_export *exp, struct lov_stripe_md *lsm,
 659                             obd_off size, int shrink);
 660         int (*o_punch)(struct obd_export *exp, struct obdo *oa,
 661                        struct lov_stripe_md *ea, obd_size start,
 662                        obd_size end, struct obd_trans_info *oti);
 663         int (*o_sync)(struct obd_export *exp, struct obdo *oa,
 664                       struct lov_stripe_md *ea, obd_size start, obd_size end);
 665         int (*o_migrate)(struct lustre_handle *conn, struct lov_stripe_md *dst,
 666                          struct lov_stripe_md *src, obd_size start,
 667                          obd_size end, struct obd_trans_info *oti);
 668         int (*o_copy)(struct lustre_handle *dstconn, struct lov_stripe_md *dst,
 669                       struct lustre_handle *srconn, struct lov_stripe_md *src,
 670                       obd_size start, obd_size end, struct obd_trans_info *);
 671         int (*o_iterate)(struct lustre_handle *conn,
 672                          int (*)(obd_id, obd_gr, void *),
 673                          obd_id *startid, obd_gr group, void *data);
 674         int (*o_preprw)(int cmd, struct obd_export *exp, struct obdo *oa,
 675                         int objcount, struct obd_ioobj *obj,
 676                         int niocount, struct niobuf_remote *remote,
 677                         struct niobuf_local *local, struct obd_trans_info *oti);
 678         int (*o_commitrw)(int cmd, struct obd_export *exp, struct obdo *oa,
 679                           int objcount, struct obd_ioobj *obj,
 680                           int niocount, struct niobuf_local *local,
 681                           struct obd_trans_info *oti, int rc);
 682         int (*o_enqueue)(struct obd_export *, struct lov_stripe_md *,
 683                          __u32 type, ldlm_policy_data_t *, __u32 mode,
 684                          int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
 685                          void *data, __u32 lvb_len, void *lvb_swabber,
 686                          struct lustre_handle *lockh);
 687         int (*o_match)(struct obd_export *, struct lov_stripe_md *, __u32 type,
 688                        ldlm_policy_data_t *, __u32 mode, int *flags, void *data,
 689                        struct lustre_handle *lockh);
 690         int (*o_change_cbdata)(struct obd_export *, struct lov_stripe_md *,
 691                                ldlm_iterator_t it, void *data);
 692         int (*o_cancel)(struct obd_export *, struct lov_stripe_md *md,
 693                         __u32 mode, struct lustre_handle *);
 694         int (*o_cancel_unused)(struct obd_export *, struct lov_stripe_md *,
 695                                int flags, void *opaque);
 696         int (*o_join_lru)(struct obd_export *, struct lov_stripe_md *,
 697                          int join);
 698         int (*o_san_preprw)(int cmd, struct obd_export *exp,
 699                             struct obdo *oa, int objcount,
 700                             struct obd_ioobj *obj, int niocount,
 701                             struct niobuf_remote *remote);
 702         int (*o_init_export)(struct obd_export *exp);
 703         int (*o_destroy_export)(struct obd_export *exp);
 704
 705         /* llog related obd_methods */
 706         int (*o_llog_init)(struct obd_device *obd, struct obd_device *disk_obd,
 707                            int count, struct llog_catid *logid);
 708         int (*o_llog_finish)(struct obd_device *obd, int count);
 709
 710         /* metadata-only methods */
 711         int (*o_pin)(struct obd_export *, obd_id ino, __u32 gen, int type,
 712                      struct obd_client_handle *, int flag);
 713         int (*o_unpin)(struct obd_export *, struct obd_client_handle *, int);
 714
 715         int (*o_import_event)(struct obd_device *, struct obd_import *,
 716                               enum obd_import_event);
 717
 718         int (*o_notify)(struct obd_device *obd, struct obd_device *watched,
 719                         int active);
 720
 721         /* quota methods */
 722         int (*o_quotacheck)(struct obd_export *, struct obd_quotactl *);
 723         int (*o_quotactl)(struct obd_export *, struct obd_quotactl *);
 724
 725         /*
 726          * NOTE: If adding ops, add another LPROCFS_OBD_OP_INIT() line
 727          * to lprocfs_alloc_obd_stats() in obdclass/lprocfs_status.c.
 728          * Also, add a wrapper function in include/linux/obd_class.h.
 729          */
 730 };
 731
 732
 733 static inline void obd_transno_commit_cb(struct obd_device *obd, __u64 transno,
 734                                          int error)
 735 {
 736         if (error) {
 737                 CERROR("%s: transno "LPD64" commit error: %d\n",
 738                        obd->obd_name, transno, error);
 739                 return;
 740         }
 741         CDEBUG(D_HA, "%s: transno "LPD64" committed\n",
 742                obd->obd_name, transno);
 743         if (transno > obd->obd_last_committed) {
 744                 obd->obd_last_committed = transno;
 745                 ptlrpc_commit_replies (obd);
 746         }
 747 }
 748
 749 #endif /* __OBD_H */