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/workqueue.h> 15 #include <linux/slow-work.h> 16 #include <linux/dlm.h> 17 #include <linux/buffer_head.h> 18 19 #define DIO_WAIT 0x00000010 20 #define DIO_METADATA 0x00000020 21 #define DIO_ALL 0x00000100 22 23 struct gfs2_log_operations; 24 struct gfs2_log_element; 25 struct gfs2_holder; 26 struct gfs2_glock; 27 struct gfs2_quota_data; 28 struct gfs2_trans; 29 struct gfs2_ail; 30 struct gfs2_jdesc; 31 struct gfs2_sbd; 32 struct lm_lockops; 33 34 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 35 36 struct gfs2_log_header_host { 37 u64 lh_sequence; /* Sequence number of this transaction */ 38 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 39 u32 lh_tail; /* Block number of log tail */ 40 u32 lh_blkno; 41 u32 lh_hash; 42 }; 43 44 /* 45 * Structure of operations that are associated with each 46 * type of element in the log. 47 */ 48 49 struct gfs2_log_operations { 50 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le); 51 void (*lo_before_commit) (struct gfs2_sbd *sdp); 52 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai); 53 void (*lo_before_scan) (struct gfs2_jdesc *jd, 54 struct gfs2_log_header_host *head, int pass); 55 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 56 struct gfs2_log_descriptor *ld, __be64 *ptr, 57 int pass); 58 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 59 const char *lo_name; 60 }; 61 62 struct gfs2_log_element { 63 struct list_head le_list; 64 const struct gfs2_log_operations *le_ops; 65 }; 66 67 #define GBF_FULL 1 68 69 struct gfs2_bitmap { 70 struct buffer_head *bi_bh; 71 char *bi_clone; 72 unsigned long bi_flags; 73 u32 bi_offset; 74 u32 bi_start; 75 u32 bi_len; 76 }; 77 78 struct gfs2_rgrpd { 79 struct list_head rd_list; /* Link with superblock */ 80 struct list_head rd_list_mru; 81 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 82 u64 rd_addr; /* grp block disk address */ 83 u64 rd_data0; /* first data location */ 84 u32 rd_length; /* length of rgrp header in fs blocks */ 85 u32 rd_data; /* num of data blocks in rgrp */ 86 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 87 u32 rd_free; 88 u32 rd_free_clone; 89 u32 rd_dinodes; 90 u64 rd_igeneration; 91 struct gfs2_bitmap *rd_bits; 92 struct mutex rd_mutex; 93 struct gfs2_log_element rd_le; 94 struct gfs2_sbd *rd_sbd; 95 unsigned int rd_bh_count; 96 u32 rd_last_alloc; 97 u32 rd_flags; 98 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 99 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 100 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 101 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 102 }; 103 104 enum gfs2_state_bits { 105 BH_Pinned = BH_PrivateStart, 106 BH_Escaped = BH_PrivateStart + 1, 107 }; 108 109 BUFFER_FNS(Pinned, pinned) 110 TAS_BUFFER_FNS(Pinned, pinned) 111 BUFFER_FNS(Escaped, escaped) 112 TAS_BUFFER_FNS(Escaped, escaped) 113 114 struct gfs2_bufdata { 115 struct buffer_head *bd_bh; 116 struct gfs2_glock *bd_gl; 117 118 union { 119 struct list_head list_tr; 120 u64 blkno; 121 } u; 122 #define bd_list_tr u.list_tr 123 #define bd_blkno u.blkno 124 125 struct gfs2_log_element bd_le; 126 127 struct gfs2_ail *bd_ail; 128 struct list_head bd_ail_st_list; 129 struct list_head bd_ail_gl_list; 130 }; 131 132 /* 133 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 134 * prefix of lock_dlm_ gets awkward. 135 */ 136 137 #define GDLM_STRNAME_BYTES 25 138 #define GDLM_LVB_SIZE 32 139 140 enum { 141 DFL_BLOCK_LOCKS = 0, 142 }; 143 144 struct lm_lockname { 145 u64 ln_number; 146 unsigned int ln_type; 147 }; 148 149 #define lm_name_equal(name1, name2) \ 150 (((name1)->ln_number == (name2)->ln_number) && \ 151 ((name1)->ln_type == (name2)->ln_type)) 152 153 154 struct gfs2_glock_operations { 155 void (*go_xmote_th) (struct gfs2_glock *gl); 156 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 157 void (*go_inval) (struct gfs2_glock *gl, int flags); 158 int (*go_demote_ok) (const struct gfs2_glock *gl); 159 int (*go_lock) (struct gfs2_holder *gh); 160 void (*go_unlock) (struct gfs2_holder *gh); 161 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl); 162 const int go_type; 163 const unsigned long go_min_hold_time; 164 }; 165 166 enum { 167 /* States */ 168 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 169 HIF_FIRST = 7, 170 HIF_WAIT = 10, 171 }; 172 173 struct gfs2_holder { 174 struct list_head gh_list; 175 176 struct gfs2_glock *gh_gl; 177 struct pid *gh_owner_pid; 178 unsigned int gh_state; 179 unsigned gh_flags; 180 181 int gh_error; 182 unsigned long gh_iflags; /* HIF_... */ 183 unsigned long gh_ip; 184 }; 185 186 enum { 187 GLF_LOCK = 1, 188 GLF_DEMOTE = 3, 189 GLF_PENDING_DEMOTE = 4, 190 GLF_DEMOTE_IN_PROGRESS = 5, 191 GLF_DIRTY = 6, 192 GLF_LFLUSH = 7, 193 GLF_INVALIDATE_IN_PROGRESS = 8, 194 GLF_REPLY_PENDING = 9, 195 GLF_INITIAL = 10, 196 GLF_FROZEN = 11, 197 }; 198 199 struct gfs2_glock { 200 struct hlist_node gl_list; 201 unsigned long gl_flags; /* GLF_... */ 202 struct lm_lockname gl_name; 203 atomic_t gl_ref; 204 205 spinlock_t gl_spin; 206 207 unsigned int gl_state; 208 unsigned int gl_target; 209 unsigned int gl_reply; 210 unsigned int gl_hash; 211 unsigned int gl_req; 212 unsigned int gl_demote_state; /* state requested by remote node */ 213 unsigned long gl_demote_time; /* time of first demote request */ 214 struct list_head gl_holders; 215 216 const struct gfs2_glock_operations *gl_ops; 217 char gl_strname[GDLM_STRNAME_BYTES]; 218 struct dlm_lksb gl_lksb; 219 char gl_lvb[32]; 220 unsigned long gl_tchange; 221 void *gl_object; 222 223 struct list_head gl_lru; 224 225 struct gfs2_sbd *gl_sbd; 226 227 struct inode *gl_aspace; 228 struct list_head gl_ail_list; 229 atomic_t gl_ail_count; 230 struct delayed_work gl_work; 231 }; 232 233 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 234 235 struct gfs2_alloc { 236 /* Quota stuff */ 237 238 struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; 239 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; 240 unsigned int al_qd_num; 241 242 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ 243 u32 al_alloced; /* Filled in by gfs2_alloc_*() */ 244 245 /* Filled in by gfs2_inplace_reserve() */ 246 247 unsigned int al_line; 248 char *al_file; 249 struct gfs2_holder al_ri_gh; 250 struct gfs2_holder al_rgd_gh; 251 struct gfs2_rgrpd *al_rgd; 252 253 }; 254 255 enum { 256 GIF_INVALID = 0, 257 GIF_QD_LOCKED = 1, 258 GIF_SW_PAGED = 3, 259 GIF_USER = 4, /* user inode, not metadata addr space */ 260 }; 261 262 263 struct gfs2_inode { 264 struct inode i_inode; 265 u64 i_no_addr; 266 u64 i_no_formal_ino; 267 u64 i_generation; 268 u64 i_eattr; 269 loff_t i_disksize; 270 unsigned long i_flags; /* GIF_... */ 271 struct gfs2_glock *i_gl; /* Move into i_gh? */ 272 struct gfs2_holder i_iopen_gh; 273 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 274 struct gfs2_alloc *i_alloc; 275 u64 i_goal; /* goal block for allocations */ 276 struct rw_semaphore i_rw_mutex; 277 struct list_head i_trunc_list; 278 u32 i_entries; 279 u32 i_diskflags; 280 u8 i_height; 281 u8 i_depth; 282 }; 283 284 /* 285 * Since i_inode is the first element of struct gfs2_inode, 286 * this is effectively a cast. 287 */ 288 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 289 { 290 return container_of(inode, struct gfs2_inode, i_inode); 291 } 292 293 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 294 { 295 return inode->i_sb->s_fs_info; 296 } 297 298 struct gfs2_file { 299 struct mutex f_fl_mutex; 300 struct gfs2_holder f_fl_gh; 301 }; 302 303 struct gfs2_revoke_replay { 304 struct list_head rr_list; 305 u64 rr_blkno; 306 unsigned int rr_where; 307 }; 308 309 enum { 310 QDF_USER = 0, 311 QDF_CHANGE = 1, 312 QDF_LOCKED = 2, 313 }; 314 315 struct gfs2_quota_data { 316 struct list_head qd_list; 317 struct list_head qd_reclaim; 318 319 atomic_t qd_count; 320 321 u32 qd_id; 322 unsigned long qd_flags; /* QDF_... */ 323 324 s64 qd_change; 325 s64 qd_change_sync; 326 327 unsigned int qd_slot; 328 unsigned int qd_slot_count; 329 330 struct buffer_head *qd_bh; 331 struct gfs2_quota_change *qd_bh_qc; 332 unsigned int qd_bh_count; 333 334 struct gfs2_glock *qd_gl; 335 struct gfs2_quota_lvb qd_qb; 336 337 u64 qd_sync_gen; 338 unsigned long qd_last_warn; 339 }; 340 341 struct gfs2_trans { 342 unsigned long tr_ip; 343 344 unsigned int tr_blocks; 345 unsigned int tr_revokes; 346 unsigned int tr_reserved; 347 348 struct gfs2_holder tr_t_gh; 349 350 int tr_touched; 351 352 unsigned int tr_num_buf; 353 unsigned int tr_num_buf_new; 354 unsigned int tr_num_databuf_new; 355 unsigned int tr_num_buf_rm; 356 unsigned int tr_num_databuf_rm; 357 struct list_head tr_list_buf; 358 359 unsigned int tr_num_revoke; 360 unsigned int tr_num_revoke_rm; 361 }; 362 363 struct gfs2_ail { 364 struct list_head ai_list; 365 366 unsigned int ai_first; 367 struct list_head ai_ail1_list; 368 struct list_head ai_ail2_list; 369 370 u64 ai_sync_gen; 371 }; 372 373 struct gfs2_journal_extent { 374 struct list_head extent_list; 375 376 unsigned int lblock; /* First logical block */ 377 u64 dblock; /* First disk block */ 378 u64 blocks; 379 }; 380 381 struct gfs2_jdesc { 382 struct list_head jd_list; 383 struct list_head extent_list; 384 struct slow_work jd_work; 385 struct inode *jd_inode; 386 unsigned long jd_flags; 387 #define JDF_RECOVERY 1 388 unsigned int jd_jid; 389 unsigned int jd_blocks; 390 }; 391 392 struct gfs2_statfs_change_host { 393 s64 sc_total; 394 s64 sc_free; 395 s64 sc_dinodes; 396 }; 397 398 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 399 #define GFS2_QUOTA_OFF 0 400 #define GFS2_QUOTA_ACCOUNT 1 401 #define GFS2_QUOTA_ON 2 402 403 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 404 #define GFS2_DATA_WRITEBACK 1 405 #define GFS2_DATA_ORDERED 2 406 407 struct gfs2_args { 408 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 409 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 410 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 411 unsigned int ar_spectator:1; /* Don't get a journal */ 412 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */ 413 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 414 unsigned int ar_localcaching:1; /* Local caching */ 415 unsigned int ar_debug:1; /* Oops on errors */ 416 unsigned int ar_upgrade:1; /* Upgrade ondisk format */ 417 unsigned int ar_posix_acl:1; /* Enable posix acls */ 418 unsigned int ar_quota:2; /* off/account/on */ 419 unsigned int ar_suiddir:1; /* suiddir support */ 420 unsigned int ar_data:2; /* ordered/writeback */ 421 unsigned int ar_meta:1; /* mount metafs */ 422 unsigned int ar_discard:1; /* discard requests */ 423 int ar_commit; /* Commit interval */ 424 }; 425 426 struct gfs2_tune { 427 spinlock_t gt_spin; 428 429 unsigned int gt_incore_log_blocks; 430 unsigned int gt_log_flush_secs; 431 432 unsigned int gt_logd_secs; 433 434 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */ 435 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 436 unsigned int gt_quota_scale_num; /* Numerator */ 437 unsigned int gt_quota_scale_den; /* Denominator */ 438 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 439 unsigned int gt_new_files_jdata; 440 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 441 unsigned int gt_stall_secs; /* Detects trouble! */ 442 unsigned int gt_complain_secs; 443 unsigned int gt_statfs_quantum; 444 unsigned int gt_statfs_slow; 445 }; 446 447 enum { 448 SDF_JOURNAL_CHECKED = 0, 449 SDF_JOURNAL_LIVE = 1, 450 SDF_SHUTDOWN = 2, 451 SDF_NOBARRIERS = 3, 452 SDF_NORECOVERY = 4, 453 }; 454 455 #define GFS2_FSNAME_LEN 256 456 457 struct gfs2_inum_host { 458 u64 no_formal_ino; 459 u64 no_addr; 460 }; 461 462 struct gfs2_sb_host { 463 u32 sb_magic; 464 u32 sb_type; 465 u32 sb_format; 466 467 u32 sb_fs_format; 468 u32 sb_multihost_format; 469 u32 sb_bsize; 470 u32 sb_bsize_shift; 471 472 struct gfs2_inum_host sb_master_dir; 473 struct gfs2_inum_host sb_root_dir; 474 475 char sb_lockproto[GFS2_LOCKNAME_LEN]; 476 char sb_locktable[GFS2_LOCKNAME_LEN]; 477 u8 sb_uuid[16]; 478 }; 479 480 /* 481 * lm_mount() return values 482 * 483 * ls_jid - the journal ID this node should use 484 * ls_first - this node is the first to mount the file system 485 * ls_lockspace - lock module's context for this file system 486 * ls_ops - lock module's functions 487 */ 488 489 struct lm_lockstruct { 490 u32 ls_id; 491 unsigned int ls_jid; 492 unsigned int ls_first; 493 unsigned int ls_first_done; 494 unsigned int ls_nodir; 495 const struct lm_lockops *ls_ops; 496 unsigned long ls_flags; 497 dlm_lockspace_t *ls_dlm; 498 499 int ls_recover_jid_done; 500 int ls_recover_jid_status; 501 }; 502 503 struct gfs2_sbd { 504 struct super_block *sd_vfs; 505 struct kobject sd_kobj; 506 unsigned long sd_flags; /* SDF_... */ 507 struct gfs2_sb_host sd_sb; 508 509 /* Constants computed on mount */ 510 511 u32 sd_fsb2bb; 512 u32 sd_fsb2bb_shift; 513 u32 sd_diptrs; /* Number of pointers in a dinode */ 514 u32 sd_inptrs; /* Number of pointers in a indirect block */ 515 u32 sd_jbsize; /* Size of a journaled data block */ 516 u32 sd_hash_bsize; /* sizeof(exhash block) */ 517 u32 sd_hash_bsize_shift; 518 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 519 u32 sd_qc_per_block; 520 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 521 u32 sd_max_height; /* Max height of a file's metadata tree */ 522 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 523 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 524 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1]; 525 526 struct gfs2_args sd_args; /* Mount arguments */ 527 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 528 529 /* Lock Stuff */ 530 531 struct lm_lockstruct sd_lockstruct; 532 struct gfs2_holder sd_live_gh; 533 struct gfs2_glock *sd_rename_gl; 534 struct gfs2_glock *sd_trans_gl; 535 536 /* Inode Stuff */ 537 538 struct dentry *sd_master_dir; 539 struct dentry *sd_root_dir; 540 541 struct inode *sd_jindex; 542 struct inode *sd_inum_inode; 543 struct inode *sd_statfs_inode; 544 struct inode *sd_ir_inode; 545 struct inode *sd_sc_inode; 546 struct inode *sd_qc_inode; 547 struct inode *sd_rindex; 548 struct inode *sd_quota_inode; 549 550 /* Inum stuff */ 551 552 struct mutex sd_inum_mutex; 553 554 /* StatFS stuff */ 555 556 spinlock_t sd_statfs_spin; 557 struct gfs2_statfs_change_host sd_statfs_master; 558 struct gfs2_statfs_change_host sd_statfs_local; 559 560 /* Resource group stuff */ 561 562 int sd_rindex_uptodate; 563 spinlock_t sd_rindex_spin; 564 struct mutex sd_rindex_mutex; 565 struct list_head sd_rindex_list; 566 struct list_head sd_rindex_mru_list; 567 struct gfs2_rgrpd *sd_rindex_forward; 568 unsigned int sd_rgrps; 569 570 /* Journal index stuff */ 571 572 struct list_head sd_jindex_list; 573 spinlock_t sd_jindex_spin; 574 struct mutex sd_jindex_mutex; 575 unsigned int sd_journals; 576 577 struct gfs2_jdesc *sd_jdesc; 578 struct gfs2_holder sd_journal_gh; 579 struct gfs2_holder sd_jinode_gh; 580 581 struct gfs2_holder sd_ir_gh; 582 struct gfs2_holder sd_sc_gh; 583 struct gfs2_holder sd_qc_gh; 584 585 /* Daemon stuff */ 586 587 struct task_struct *sd_logd_process; 588 struct task_struct *sd_quotad_process; 589 590 /* Quota stuff */ 591 592 struct list_head sd_quota_list; 593 atomic_t sd_quota_count; 594 struct mutex sd_quota_mutex; 595 wait_queue_head_t sd_quota_wait; 596 struct list_head sd_trunc_list; 597 spinlock_t sd_trunc_lock; 598 599 unsigned int sd_quota_slots; 600 unsigned int sd_quota_chunks; 601 unsigned char **sd_quota_bitmap; 602 603 u64 sd_quota_sync_gen; 604 605 /* Log stuff */ 606 607 spinlock_t sd_log_lock; 608 609 unsigned int sd_log_blks_reserved; 610 unsigned int sd_log_commited_buf; 611 unsigned int sd_log_commited_databuf; 612 unsigned int sd_log_commited_revoke; 613 614 unsigned int sd_log_num_buf; 615 unsigned int sd_log_num_revoke; 616 unsigned int sd_log_num_rg; 617 unsigned int sd_log_num_databuf; 618 619 struct list_head sd_log_le_buf; 620 struct list_head sd_log_le_revoke; 621 struct list_head sd_log_le_rg; 622 struct list_head sd_log_le_databuf; 623 struct list_head sd_log_le_ordered; 624 625 atomic_t sd_log_blks_free; 626 struct mutex sd_log_reserve_mutex; 627 628 u64 sd_log_sequence; 629 unsigned int sd_log_head; 630 unsigned int sd_log_tail; 631 int sd_log_idle; 632 633 unsigned long sd_log_flush_time; 634 struct rw_semaphore sd_log_flush_lock; 635 atomic_t sd_log_in_flight; 636 wait_queue_head_t sd_log_flush_wait; 637 638 unsigned int sd_log_flush_head; 639 u64 sd_log_flush_wrapped; 640 641 struct list_head sd_ail1_list; 642 struct list_head sd_ail2_list; 643 u64 sd_ail_sync_gen; 644 645 /* Replay stuff */ 646 647 struct list_head sd_revoke_list; 648 unsigned int sd_replay_tail; 649 650 unsigned int sd_found_blocks; 651 unsigned int sd_found_revokes; 652 unsigned int sd_replayed_blocks; 653 654 /* For quiescing the filesystem */ 655 656 struct gfs2_holder sd_freeze_gh; 657 struct mutex sd_freeze_lock; 658 unsigned int sd_freeze_count; 659 660 char sd_fsname[GFS2_FSNAME_LEN]; 661 char sd_table_name[GFS2_FSNAME_LEN]; 662 char sd_proto_name[GFS2_FSNAME_LEN]; 663 664 /* Debugging crud */ 665 666 unsigned long sd_last_warning; 667 struct dentry *debugfs_dir; /* debugfs directory */ 668 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 669 }; 670 671 #endif /* __INCORE_DOT_H__ */ 672 673