1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #ifndef __INCORE_DOT_H__ 11 #define __INCORE_DOT_H__ 12 13 #include <linux/fs.h> 14 #include <linux/kobject.h> 15 #include <linux/workqueue.h> 16 #include <linux/dlm.h> 17 #include <linux/buffer_head.h> 18 #include <linux/rcupdate.h> 19 #include <linux/rculist_bl.h> 20 #include <linux/completion.h> 21 #include <linux/rbtree.h> 22 #include <linux/ktime.h> 23 #include <linux/percpu.h> 24 #include <linux/lockref.h> 25 #include <linux/rhashtable.h> 26 27 #define DIO_WAIT 0x00000010 28 #define DIO_METADATA 0x00000020 29 30 struct gfs2_log_operations; 31 struct gfs2_bufdata; 32 struct gfs2_holder; 33 struct gfs2_glock; 34 struct gfs2_quota_data; 35 struct gfs2_trans; 36 struct gfs2_jdesc; 37 struct gfs2_sbd; 38 struct lm_lockops; 39 40 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 41 42 struct gfs2_log_header_host { 43 u64 lh_sequence; /* Sequence number of this transaction */ 44 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 45 u32 lh_tail; /* Block number of log tail */ 46 u32 lh_blkno; 47 }; 48 49 /* 50 * Structure of operations that are associated with each 51 * type of element in the log. 52 */ 53 54 struct gfs2_log_operations { 55 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 56 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 57 void (*lo_before_scan) (struct gfs2_jdesc *jd, 58 struct gfs2_log_header_host *head, int pass); 59 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 60 struct gfs2_log_descriptor *ld, __be64 *ptr, 61 int pass); 62 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 63 const char *lo_name; 64 }; 65 66 #define GBF_FULL 1 67 68 struct gfs2_bitmap { 69 struct buffer_head *bi_bh; 70 char *bi_clone; 71 unsigned long bi_flags; 72 u32 bi_offset; 73 u32 bi_start; 74 u32 bi_len; 75 u32 bi_blocks; 76 }; 77 78 struct gfs2_rgrpd { 79 struct rb_node rd_node; /* Link with superblock */ 80 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 81 u64 rd_addr; /* grp block disk address */ 82 u64 rd_data0; /* first data location */ 83 u32 rd_length; /* length of rgrp header in fs blocks */ 84 u32 rd_data; /* num of data blocks in rgrp */ 85 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 86 u32 rd_free; 87 u32 rd_reserved; /* number of blocks reserved */ 88 u32 rd_free_clone; 89 u32 rd_dinodes; 90 u64 rd_igeneration; 91 struct gfs2_bitmap *rd_bits; 92 struct gfs2_sbd *rd_sbd; 93 struct gfs2_rgrp_lvb *rd_rgl; 94 u32 rd_last_alloc; 95 u32 rd_flags; 96 u32 rd_extfail_pt; /* extent failure point */ 97 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 98 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 99 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 100 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 101 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 102 spinlock_t rd_rsspin; /* protects reservation related vars */ 103 struct rb_root rd_rstree; /* multi-block reservation tree */ 104 }; 105 106 struct gfs2_rbm { 107 struct gfs2_rgrpd *rgd; 108 u32 offset; /* The offset is bitmap relative */ 109 int bii; /* Bitmap index */ 110 }; 111 112 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm) 113 { 114 return rbm->rgd->rd_bits + rbm->bii; 115 } 116 117 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm) 118 { 119 BUG_ON(rbm->offset >= rbm->rgd->rd_data); 120 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) + 121 rbm->offset; 122 } 123 124 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1, 125 const struct gfs2_rbm *rbm2) 126 { 127 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) && 128 (rbm1->offset == rbm2->offset); 129 } 130 131 enum gfs2_state_bits { 132 BH_Pinned = BH_PrivateStart, 133 BH_Escaped = BH_PrivateStart + 1, 134 }; 135 136 BUFFER_FNS(Pinned, pinned) 137 TAS_BUFFER_FNS(Pinned, pinned) 138 BUFFER_FNS(Escaped, escaped) 139 TAS_BUFFER_FNS(Escaped, escaped) 140 141 struct gfs2_bufdata { 142 struct buffer_head *bd_bh; 143 struct gfs2_glock *bd_gl; 144 u64 bd_blkno; 145 146 struct list_head bd_list; 147 const struct gfs2_log_operations *bd_ops; 148 149 struct gfs2_trans *bd_tr; 150 struct list_head bd_ail_st_list; 151 struct list_head bd_ail_gl_list; 152 }; 153 154 /* 155 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 156 * prefix of lock_dlm_ gets awkward. 157 */ 158 159 #define GDLM_STRNAME_BYTES 25 160 #define GDLM_LVB_SIZE 32 161 162 /* 163 * ls_recover_flags: 164 * 165 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 166 * held by failed nodes whose journals need recovery. Those locks should 167 * only be used for journal recovery until the journal recovery is done. 168 * This is set by the dlm recover_prep callback and cleared by the 169 * gfs2_control thread when journal recovery is complete. To avoid 170 * races between recover_prep setting and gfs2_control clearing, recover_spin 171 * is held while changing this bit and reading/writing recover_block 172 * and recover_start. 173 * 174 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 175 * 176 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 177 * recovery of all journals before allowing other nodes to mount the fs. 178 * This is cleared when FIRST_MOUNT_DONE is set. 179 * 180 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 181 * recovery of all journals, and now allows other nodes to mount the fs. 182 * 183 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 184 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 185 * control clearing BLOCK_LOCKS for further recoveries. 186 * 187 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 188 * 189 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 190 * and recover_done(), i.e. set while recover_block == recover_start. 191 */ 192 193 enum { 194 DFL_BLOCK_LOCKS = 0, 195 DFL_NO_DLM_OPS = 1, 196 DFL_FIRST_MOUNT = 2, 197 DFL_FIRST_MOUNT_DONE = 3, 198 DFL_MOUNT_DONE = 4, 199 DFL_UNMOUNT = 5, 200 DFL_DLM_RECOVERY = 6, 201 }; 202 203 /* 204 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 205 * the struct; padding at the end is fine. 206 */ 207 struct lm_lockname { 208 u64 ln_number; 209 struct gfs2_sbd *ln_sbd; 210 unsigned int ln_type; 211 }; 212 213 #define lm_name_equal(name1, name2) \ 214 (((name1)->ln_number == (name2)->ln_number) && \ 215 ((name1)->ln_type == (name2)->ln_type) && \ 216 ((name1)->ln_sbd == (name2)->ln_sbd)) 217 218 219 struct gfs2_glock_operations { 220 void (*go_sync) (struct gfs2_glock *gl); 221 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 222 void (*go_inval) (struct gfs2_glock *gl, int flags); 223 int (*go_demote_ok) (const struct gfs2_glock *gl); 224 int (*go_lock) (struct gfs2_holder *gh); 225 void (*go_unlock) (struct gfs2_holder *gh); 226 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl); 227 void (*go_callback)(struct gfs2_glock *gl, bool remote); 228 const int go_type; 229 const unsigned long go_flags; 230 #define GLOF_ASPACE 1 231 #define GLOF_LVB 2 232 #define GLOF_LRU 4 233 }; 234 235 enum { 236 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 237 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 238 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 239 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 240 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 241 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 242 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 243 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 244 GFS2_NR_LKSTATS 245 }; 246 247 struct gfs2_lkstats { 248 u64 stats[GFS2_NR_LKSTATS]; 249 }; 250 251 enum { 252 /* States */ 253 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 254 HIF_FIRST = 7, 255 HIF_WAIT = 10, 256 }; 257 258 struct gfs2_holder { 259 struct list_head gh_list; 260 261 struct gfs2_glock *gh_gl; 262 struct pid *gh_owner_pid; 263 u16 gh_flags; 264 u16 gh_state; 265 266 int gh_error; 267 unsigned long gh_iflags; /* HIF_... */ 268 unsigned long gh_ip; 269 }; 270 271 /* Number of quota types we support */ 272 #define GFS2_MAXQUOTAS 2 273 274 struct gfs2_qadata { /* quota allocation data */ 275 /* Quota stuff */ 276 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 277 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 278 unsigned int qa_qd_num; 279 }; 280 281 /* Resource group multi-block reservation, in order of appearance: 282 283 Step 1. Function prepares to write, allocates a mb, sets the size hint. 284 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 285 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 286 Step 4. Bits are assigned from the rgrp based on either the reservation 287 or wherever it can. 288 */ 289 290 struct gfs2_blkreserv { 291 /* components used during write (step 1): */ 292 atomic_t rs_sizehint; /* hint of the write size */ 293 294 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */ 295 struct rb_node rs_node; /* link to other block reservations */ 296 struct gfs2_rbm rs_rbm; /* Start of reservation */ 297 u32 rs_free; /* how many blocks are still free */ 298 u64 rs_inum; /* Inode number for reservation */ 299 }; 300 301 /* 302 * Allocation parameters 303 * @target: The number of blocks we'd ideally like to allocate 304 * @aflags: The flags (e.g. Orlov flag) 305 * 306 * The intent is to gradually expand this structure over time in 307 * order to give more information, e.g. alignment, min extent size 308 * to the allocation code. 309 */ 310 struct gfs2_alloc_parms { 311 u64 target; 312 u32 min_target; 313 u32 aflags; 314 u64 allowed; 315 }; 316 317 enum { 318 GLF_LOCK = 1, 319 GLF_DEMOTE = 3, 320 GLF_PENDING_DEMOTE = 4, 321 GLF_DEMOTE_IN_PROGRESS = 5, 322 GLF_DIRTY = 6, 323 GLF_LFLUSH = 7, 324 GLF_INVALIDATE_IN_PROGRESS = 8, 325 GLF_REPLY_PENDING = 9, 326 GLF_INITIAL = 10, 327 GLF_FROZEN = 11, 328 GLF_QUEUED = 12, 329 GLF_LRU = 13, 330 GLF_OBJECT = 14, /* Used only for tracing */ 331 GLF_BLOCKING = 15, 332 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 333 }; 334 335 struct gfs2_glock { 336 unsigned long gl_flags; /* GLF_... */ 337 struct lm_lockname gl_name; 338 339 struct lockref gl_lockref; 340 341 /* State fields protected by gl_lockref.lock */ 342 unsigned int gl_state:2, /* Current state */ 343 gl_target:2, /* Target state */ 344 gl_demote_state:2, /* State requested by remote node */ 345 gl_req:2, /* State in last dlm request */ 346 gl_reply:8; /* Last reply from the dlm */ 347 348 unsigned long gl_demote_time; /* time of first demote request */ 349 long gl_hold_time; 350 struct list_head gl_holders; 351 352 const struct gfs2_glock_operations *gl_ops; 353 ktime_t gl_dstamp; 354 struct gfs2_lkstats gl_stats; 355 struct dlm_lksb gl_lksb; 356 unsigned long gl_tchange; 357 void *gl_object; 358 359 struct list_head gl_lru; 360 struct list_head gl_ail_list; 361 atomic_t gl_ail_count; 362 atomic_t gl_revokes; 363 struct delayed_work gl_work; 364 union { 365 /* For inode and iopen glocks only */ 366 struct work_struct gl_delete; 367 /* For rgrp glocks only */ 368 struct { 369 loff_t start; 370 loff_t end; 371 } gl_vm; 372 }; 373 struct rcu_head gl_rcu; 374 struct rhash_head gl_node; 375 }; 376 377 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 378 379 enum { 380 GIF_INVALID = 0, 381 GIF_QD_LOCKED = 1, 382 GIF_ALLOC_FAILED = 2, 383 GIF_SW_PAGED = 3, 384 GIF_ORDERED = 4, 385 GIF_FREE_VFS_INODE = 5, 386 GIF_GLOP_PENDING = 6, 387 }; 388 389 struct gfs2_inode { 390 struct inode i_inode; 391 u64 i_no_addr; 392 u64 i_no_formal_ino; 393 u64 i_generation; 394 u64 i_eattr; 395 unsigned long i_flags; /* GIF_... */ 396 struct gfs2_glock *i_gl; /* Move into i_gh? */ 397 struct gfs2_holder i_iopen_gh; 398 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 399 struct gfs2_qadata *i_qadata; /* quota allocation data */ 400 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 401 struct gfs2_rgrpd *i_rgd; 402 u64 i_goal; /* goal block for allocations */ 403 struct rw_semaphore i_rw_mutex; 404 struct list_head i_ordered; 405 struct list_head i_trunc_list; 406 __be64 *i_hash_cache; 407 u32 i_entries; 408 u32 i_diskflags; 409 u8 i_height; 410 u8 i_depth; 411 u16 i_rahead; 412 }; 413 414 /* 415 * Since i_inode is the first element of struct gfs2_inode, 416 * this is effectively a cast. 417 */ 418 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 419 { 420 return container_of(inode, struct gfs2_inode, i_inode); 421 } 422 423 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 424 { 425 return inode->i_sb->s_fs_info; 426 } 427 428 struct gfs2_file { 429 struct mutex f_fl_mutex; 430 struct gfs2_holder f_fl_gh; 431 }; 432 433 struct gfs2_revoke_replay { 434 struct list_head rr_list; 435 u64 rr_blkno; 436 unsigned int rr_where; 437 }; 438 439 enum { 440 QDF_CHANGE = 1, 441 QDF_LOCKED = 2, 442 QDF_REFRESH = 3, 443 QDF_QMSG_QUIET = 4, 444 }; 445 446 struct gfs2_quota_data { 447 struct hlist_bl_node qd_hlist; 448 struct list_head qd_list; 449 struct kqid qd_id; 450 struct gfs2_sbd *qd_sbd; 451 struct lockref qd_lockref; 452 struct list_head qd_lru; 453 unsigned qd_hash; 454 455 unsigned long qd_flags; /* QDF_... */ 456 457 s64 qd_change; 458 s64 qd_change_sync; 459 460 unsigned int qd_slot; 461 unsigned int qd_slot_count; 462 463 struct buffer_head *qd_bh; 464 struct gfs2_quota_change *qd_bh_qc; 465 unsigned int qd_bh_count; 466 467 struct gfs2_glock *qd_gl; 468 struct gfs2_quota_lvb qd_qb; 469 470 u64 qd_sync_gen; 471 unsigned long qd_last_warn; 472 struct rcu_head qd_rcu; 473 }; 474 475 enum { 476 TR_TOUCHED = 1, 477 TR_ATTACHED = 2, 478 TR_ALLOCED = 3, 479 }; 480 481 struct gfs2_trans { 482 unsigned long tr_ip; 483 484 unsigned int tr_blocks; 485 unsigned int tr_revokes; 486 unsigned int tr_reserved; 487 unsigned long tr_flags; 488 489 unsigned int tr_num_buf_new; 490 unsigned int tr_num_databuf_new; 491 unsigned int tr_num_buf_rm; 492 unsigned int tr_num_databuf_rm; 493 unsigned int tr_num_revoke; 494 unsigned int tr_num_revoke_rm; 495 496 struct list_head tr_list; 497 struct list_head tr_databuf; 498 struct list_head tr_buf; 499 500 unsigned int tr_first; 501 struct list_head tr_ail1_list; 502 struct list_head tr_ail2_list; 503 }; 504 505 struct gfs2_journal_extent { 506 struct list_head list; 507 508 unsigned int lblock; /* First logical block */ 509 u64 dblock; /* First disk block */ 510 u64 blocks; 511 }; 512 513 struct gfs2_jdesc { 514 struct list_head jd_list; 515 struct list_head extent_list; 516 unsigned int nr_extents; 517 struct work_struct jd_work; 518 struct inode *jd_inode; 519 unsigned long jd_flags; 520 #define JDF_RECOVERY 1 521 unsigned int jd_jid; 522 unsigned int jd_blocks; 523 int jd_recover_error; 524 /* Replay stuff */ 525 526 unsigned int jd_found_blocks; 527 unsigned int jd_found_revokes; 528 unsigned int jd_replayed_blocks; 529 530 struct list_head jd_revoke_list; 531 unsigned int jd_replay_tail; 532 533 }; 534 535 struct gfs2_statfs_change_host { 536 s64 sc_total; 537 s64 sc_free; 538 s64 sc_dinodes; 539 }; 540 541 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 542 #define GFS2_QUOTA_OFF 0 543 #define GFS2_QUOTA_ACCOUNT 1 544 #define GFS2_QUOTA_ON 2 545 546 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 547 #define GFS2_DATA_WRITEBACK 1 548 #define GFS2_DATA_ORDERED 2 549 550 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 551 #define GFS2_ERRORS_WITHDRAW 0 552 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 553 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 554 #define GFS2_ERRORS_PANIC 3 555 556 struct gfs2_args { 557 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 558 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 559 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 560 unsigned int ar_spectator:1; /* Don't get a journal */ 561 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 562 unsigned int ar_debug:1; /* Oops on errors */ 563 unsigned int ar_posix_acl:1; /* Enable posix acls */ 564 unsigned int ar_quota:2; /* off/account/on */ 565 unsigned int ar_suiddir:1; /* suiddir support */ 566 unsigned int ar_data:2; /* ordered/writeback */ 567 unsigned int ar_meta:1; /* mount metafs */ 568 unsigned int ar_discard:1; /* discard requests */ 569 unsigned int ar_errors:2; /* errors=withdraw | panic */ 570 unsigned int ar_nobarrier:1; /* do not send barriers */ 571 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 572 unsigned int ar_loccookie:1; /* use location based readdir 573 cookies */ 574 int ar_commit; /* Commit interval */ 575 int ar_statfs_quantum; /* The fast statfs interval */ 576 int ar_quota_quantum; /* The quota interval */ 577 int ar_statfs_percent; /* The % change to force sync */ 578 }; 579 580 struct gfs2_tune { 581 spinlock_t gt_spin; 582 583 unsigned int gt_logd_secs; 584 585 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 586 unsigned int gt_quota_scale_num; /* Numerator */ 587 unsigned int gt_quota_scale_den; /* Denominator */ 588 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 589 unsigned int gt_new_files_jdata; 590 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 591 unsigned int gt_complain_secs; 592 unsigned int gt_statfs_quantum; 593 unsigned int gt_statfs_slow; 594 }; 595 596 enum { 597 SDF_JOURNAL_CHECKED = 0, 598 SDF_JOURNAL_LIVE = 1, 599 SDF_SHUTDOWN = 2, 600 SDF_NOBARRIERS = 3, 601 SDF_NORECOVERY = 4, 602 SDF_DEMOTE = 5, 603 SDF_NOJOURNALID = 6, 604 SDF_RORECOVERY = 7, /* read only recovery */ 605 SDF_SKIP_DLM_UNLOCK = 8, 606 SDF_FORCE_AIL_FLUSH = 9, 607 }; 608 609 enum gfs2_freeze_state { 610 SFS_UNFROZEN = 0, 611 SFS_STARTING_FREEZE = 1, 612 SFS_FROZEN = 2, 613 }; 614 615 #define GFS2_FSNAME_LEN 256 616 617 struct gfs2_inum_host { 618 u64 no_formal_ino; 619 u64 no_addr; 620 }; 621 622 struct gfs2_sb_host { 623 u32 sb_magic; 624 u32 sb_type; 625 u32 sb_format; 626 627 u32 sb_fs_format; 628 u32 sb_multihost_format; 629 u32 sb_bsize; 630 u32 sb_bsize_shift; 631 632 struct gfs2_inum_host sb_master_dir; 633 struct gfs2_inum_host sb_root_dir; 634 635 char sb_lockproto[GFS2_LOCKNAME_LEN]; 636 char sb_locktable[GFS2_LOCKNAME_LEN]; 637 }; 638 639 /* 640 * lm_mount() return values 641 * 642 * ls_jid - the journal ID this node should use 643 * ls_first - this node is the first to mount the file system 644 * ls_lockspace - lock module's context for this file system 645 * ls_ops - lock module's functions 646 */ 647 648 struct lm_lockstruct { 649 int ls_jid; 650 unsigned int ls_first; 651 const struct lm_lockops *ls_ops; 652 dlm_lockspace_t *ls_dlm; 653 654 int ls_recover_jid_done; /* These two are deprecated, */ 655 int ls_recover_jid_status; /* used previously by gfs_controld */ 656 657 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 658 struct dlm_lksb ls_control_lksb; /* control_lock */ 659 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 660 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 661 char *ls_lvb_bits; 662 663 spinlock_t ls_recover_spin; /* protects following fields */ 664 unsigned long ls_recover_flags; /* DFL_ */ 665 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 666 uint32_t ls_recover_start; /* gen in last recover_done cb */ 667 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 668 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 669 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 670 uint32_t *ls_recover_result; /* result of last jid recovery */ 671 }; 672 673 struct gfs2_pcpu_lkstats { 674 /* One struct for each glock type */ 675 struct gfs2_lkstats lkstats[10]; 676 }; 677 678 struct gfs2_sbd { 679 struct super_block *sd_vfs; 680 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 681 struct kobject sd_kobj; 682 unsigned long sd_flags; /* SDF_... */ 683 struct gfs2_sb_host sd_sb; 684 685 /* Constants computed on mount */ 686 687 u32 sd_fsb2bb; 688 u32 sd_fsb2bb_shift; 689 u32 sd_diptrs; /* Number of pointers in a dinode */ 690 u32 sd_inptrs; /* Number of pointers in a indirect block */ 691 u32 sd_jbsize; /* Size of a journaled data block */ 692 u32 sd_hash_bsize; /* sizeof(exhash block) */ 693 u32 sd_hash_bsize_shift; 694 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 695 u32 sd_qc_per_block; 696 u32 sd_blocks_per_bitmap; 697 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 698 u32 sd_max_height; /* Max height of a file's metadata tree */ 699 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 700 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 701 702 struct gfs2_args sd_args; /* Mount arguments */ 703 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 704 705 /* Lock Stuff */ 706 707 struct lm_lockstruct sd_lockstruct; 708 struct gfs2_holder sd_live_gh; 709 struct gfs2_glock *sd_rename_gl; 710 struct gfs2_glock *sd_freeze_gl; 711 struct work_struct sd_freeze_work; 712 wait_queue_head_t sd_glock_wait; 713 atomic_t sd_glock_disposal; 714 struct completion sd_locking_init; 715 struct completion sd_wdack; 716 struct delayed_work sd_control_work; 717 718 /* Inode Stuff */ 719 720 struct dentry *sd_master_dir; 721 struct dentry *sd_root_dir; 722 723 struct inode *sd_jindex; 724 struct inode *sd_statfs_inode; 725 struct inode *sd_sc_inode; 726 struct inode *sd_qc_inode; 727 struct inode *sd_rindex; 728 struct inode *sd_quota_inode; 729 730 /* StatFS stuff */ 731 732 spinlock_t sd_statfs_spin; 733 struct gfs2_statfs_change_host sd_statfs_master; 734 struct gfs2_statfs_change_host sd_statfs_local; 735 int sd_statfs_force_sync; 736 737 /* Resource group stuff */ 738 739 int sd_rindex_uptodate; 740 spinlock_t sd_rindex_spin; 741 struct rb_root sd_rindex_tree; 742 unsigned int sd_rgrps; 743 unsigned int sd_max_rg_data; 744 745 /* Journal index stuff */ 746 747 struct list_head sd_jindex_list; 748 spinlock_t sd_jindex_spin; 749 struct mutex sd_jindex_mutex; 750 unsigned int sd_journals; 751 752 struct gfs2_jdesc *sd_jdesc; 753 struct gfs2_holder sd_journal_gh; 754 struct gfs2_holder sd_jinode_gh; 755 756 struct gfs2_holder sd_sc_gh; 757 struct gfs2_holder sd_qc_gh; 758 759 struct completion sd_journal_ready; 760 761 /* Daemon stuff */ 762 763 struct task_struct *sd_logd_process; 764 struct task_struct *sd_quotad_process; 765 766 /* Quota stuff */ 767 768 struct list_head sd_quota_list; 769 atomic_t sd_quota_count; 770 struct mutex sd_quota_mutex; 771 struct mutex sd_quota_sync_mutex; 772 wait_queue_head_t sd_quota_wait; 773 struct list_head sd_trunc_list; 774 spinlock_t sd_trunc_lock; 775 776 unsigned int sd_quota_slots; 777 unsigned long *sd_quota_bitmap; 778 spinlock_t sd_bitmap_lock; 779 780 u64 sd_quota_sync_gen; 781 782 /* Log stuff */ 783 784 struct address_space sd_aspace; 785 786 spinlock_t sd_log_lock; 787 788 struct gfs2_trans *sd_log_tr; 789 unsigned int sd_log_blks_reserved; 790 int sd_log_commited_revoke; 791 792 atomic_t sd_log_pinned; 793 unsigned int sd_log_num_revoke; 794 795 struct list_head sd_log_le_revoke; 796 struct list_head sd_log_le_ordered; 797 spinlock_t sd_ordered_lock; 798 799 atomic_t sd_log_thresh1; 800 atomic_t sd_log_thresh2; 801 atomic_t sd_log_blks_free; 802 atomic_t sd_log_blks_needed; 803 wait_queue_head_t sd_log_waitq; 804 wait_queue_head_t sd_logd_waitq; 805 806 u64 sd_log_sequence; 807 unsigned int sd_log_head; 808 unsigned int sd_log_tail; 809 int sd_log_idle; 810 811 struct rw_semaphore sd_log_flush_lock; 812 atomic_t sd_log_in_flight; 813 struct bio *sd_log_bio; 814 wait_queue_head_t sd_log_flush_wait; 815 int sd_log_error; 816 817 atomic_t sd_reserving_log; 818 wait_queue_head_t sd_reserving_log_wait; 819 820 unsigned int sd_log_flush_head; 821 822 spinlock_t sd_ail_lock; 823 struct list_head sd_ail1_list; 824 struct list_head sd_ail2_list; 825 826 /* For quiescing the filesystem */ 827 struct gfs2_holder sd_freeze_gh; 828 atomic_t sd_freeze_state; 829 struct mutex sd_freeze_mutex; 830 831 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; 832 char sd_table_name[GFS2_FSNAME_LEN]; 833 char sd_proto_name[GFS2_FSNAME_LEN]; 834 835 /* Debugging crud */ 836 837 unsigned long sd_last_warning; 838 struct dentry *debugfs_dir; /* debugfs directory */ 839 struct dentry *debugfs_dentry_glocks; 840 struct dentry *debugfs_dentry_glstats; 841 struct dentry *debugfs_dentry_sbstats; 842 }; 843 844 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 845 { 846 gl->gl_stats.stats[which]++; 847 } 848 849 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 850 { 851 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 852 preempt_disable(); 853 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 854 preempt_enable(); 855 } 856 857 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 858 859 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) 860 { 861 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 862 } 863 864 #endif /* __INCORE_DOT_H__ */ 865 866