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/dlm.h> 16 #include <linux/buffer_head.h> 17 18 #define DIO_WAIT 0x00000010 19 #define DIO_METADATA 0x00000020 20 #define DIO_ALL 0x00000100 21 22 struct gfs2_log_operations; 23 struct gfs2_log_element; 24 struct gfs2_holder; 25 struct gfs2_glock; 26 struct gfs2_quota_data; 27 struct gfs2_trans; 28 struct gfs2_ail; 29 struct gfs2_jdesc; 30 struct gfs2_sbd; 31 struct lm_lockops; 32 33 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 34 35 struct gfs2_log_header_host { 36 u64 lh_sequence; /* Sequence number of this transaction */ 37 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 38 u32 lh_tail; /* Block number of log tail */ 39 u32 lh_blkno; 40 u32 lh_hash; 41 }; 42 43 /* 44 * Structure of operations that are associated with each 45 * type of element in the log. 46 */ 47 48 struct gfs2_log_operations { 49 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le); 50 void (*lo_before_commit) (struct gfs2_sbd *sdp); 51 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai); 52 void (*lo_before_scan) (struct gfs2_jdesc *jd, 53 struct gfs2_log_header_host *head, int pass); 54 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 55 struct gfs2_log_descriptor *ld, __be64 *ptr, 56 int pass); 57 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 58 const char *lo_name; 59 }; 60 61 struct gfs2_log_element { 62 struct list_head le_list; 63 const struct gfs2_log_operations *le_ops; 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 }; 76 77 struct gfs2_rgrpd { 78 struct list_head rd_list; /* Link with superblock */ 79 struct list_head rd_list_mru; 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_free_clone; 88 u32 rd_dinodes; 89 u64 rd_igeneration; 90 struct gfs2_bitmap *rd_bits; 91 struct mutex rd_mutex; 92 struct gfs2_log_element rd_le; 93 struct gfs2_sbd *rd_sbd; 94 unsigned int rd_bh_count; 95 u32 rd_last_alloc; 96 u32 rd_flags; 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_MASK 0xf0000000 /* mask for internal flags */ 101 }; 102 103 enum gfs2_state_bits { 104 BH_Pinned = BH_PrivateStart, 105 BH_Escaped = BH_PrivateStart + 1, 106 }; 107 108 BUFFER_FNS(Pinned, pinned) 109 TAS_BUFFER_FNS(Pinned, pinned) 110 BUFFER_FNS(Escaped, escaped) 111 TAS_BUFFER_FNS(Escaped, escaped) 112 113 struct gfs2_bufdata { 114 struct buffer_head *bd_bh; 115 struct gfs2_glock *bd_gl; 116 117 union { 118 struct list_head list_tr; 119 u64 blkno; 120 } u; 121 #define bd_list_tr u.list_tr 122 #define bd_blkno u.blkno 123 124 struct gfs2_log_element bd_le; 125 126 struct gfs2_ail *bd_ail; 127 struct list_head bd_ail_st_list; 128 struct list_head bd_ail_gl_list; 129 }; 130 131 /* 132 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 133 * prefix of lock_dlm_ gets awkward. 134 */ 135 136 #define GDLM_STRNAME_BYTES 25 137 #define GDLM_LVB_SIZE 32 138 139 enum { 140 DFL_BLOCK_LOCKS = 0, 141 }; 142 143 struct lm_lockname { 144 u64 ln_number; 145 unsigned int ln_type; 146 }; 147 148 #define lm_name_equal(name1, name2) \ 149 (((name1)->ln_number == (name2)->ln_number) && \ 150 ((name1)->ln_type == (name2)->ln_type)) 151 152 153 struct gfs2_glock_operations { 154 void (*go_xmote_th) (struct gfs2_glock *gl); 155 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 156 void (*go_inval) (struct gfs2_glock *gl, int flags); 157 int (*go_demote_ok) (const struct gfs2_glock *gl); 158 int (*go_lock) (struct gfs2_holder *gh); 159 void (*go_unlock) (struct gfs2_holder *gh); 160 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl); 161 void (*go_callback) (struct gfs2_glock *gl); 162 const int go_type; 163 const unsigned long go_min_hold_time; 164 const unsigned long go_flags; 165 #define GLOF_ASPACE 1 166 }; 167 168 enum { 169 /* States */ 170 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 171 HIF_FIRST = 7, 172 HIF_WAIT = 10, 173 }; 174 175 struct gfs2_holder { 176 struct list_head gh_list; 177 178 struct gfs2_glock *gh_gl; 179 struct pid *gh_owner_pid; 180 unsigned int gh_state; 181 unsigned gh_flags; 182 183 int gh_error; 184 unsigned long gh_iflags; /* HIF_... */ 185 unsigned long gh_ip; 186 }; 187 188 enum { 189 GLF_LOCK = 1, 190 GLF_DEMOTE = 3, 191 GLF_PENDING_DEMOTE = 4, 192 GLF_DEMOTE_IN_PROGRESS = 5, 193 GLF_DIRTY = 6, 194 GLF_LFLUSH = 7, 195 GLF_INVALIDATE_IN_PROGRESS = 8, 196 GLF_REPLY_PENDING = 9, 197 GLF_INITIAL = 10, 198 GLF_FROZEN = 11, 199 }; 200 201 struct gfs2_glock { 202 struct hlist_node gl_list; 203 unsigned long gl_flags; /* GLF_... */ 204 struct lm_lockname gl_name; 205 atomic_t gl_ref; 206 207 spinlock_t gl_spin; 208 209 unsigned int gl_state; 210 unsigned int gl_target; 211 unsigned int gl_reply; 212 unsigned int gl_hash; 213 unsigned int gl_req; 214 unsigned int gl_demote_state; /* state requested by remote node */ 215 unsigned long gl_demote_time; /* time of first demote request */ 216 struct list_head gl_holders; 217 218 const struct gfs2_glock_operations *gl_ops; 219 char gl_strname[GDLM_STRNAME_BYTES]; 220 struct dlm_lksb gl_lksb; 221 char gl_lvb[32]; 222 unsigned long gl_tchange; 223 void *gl_object; 224 225 struct list_head gl_lru; 226 227 struct gfs2_sbd *gl_sbd; 228 229 struct list_head gl_ail_list; 230 atomic_t gl_ail_count; 231 struct delayed_work gl_work; 232 struct work_struct gl_delete; 233 }; 234 235 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 236 237 struct gfs2_alloc { 238 /* Quota stuff */ 239 240 struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; 241 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; 242 unsigned int al_qd_num; 243 244 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ 245 u32 al_alloced; /* Filled in by gfs2_alloc_*() */ 246 247 /* Filled in by gfs2_inplace_reserve() */ 248 249 unsigned int al_line; 250 char *al_file; 251 struct gfs2_holder al_ri_gh; 252 struct gfs2_holder al_rgd_gh; 253 struct gfs2_rgrpd *al_rgd; 254 255 }; 256 257 enum { 258 GIF_INVALID = 0, 259 GIF_QD_LOCKED = 1, 260 GIF_SW_PAGED = 3, 261 }; 262 263 264 struct gfs2_inode { 265 struct inode i_inode; 266 u64 i_no_addr; 267 u64 i_no_formal_ino; 268 u64 i_generation; 269 u64 i_eattr; 270 loff_t i_disksize; 271 unsigned long i_flags; /* GIF_... */ 272 struct gfs2_glock *i_gl; /* Move into i_gh? */ 273 struct gfs2_holder i_iopen_gh; 274 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 275 struct gfs2_alloc *i_alloc; 276 u64 i_goal; /* goal block for allocations */ 277 struct rw_semaphore i_rw_mutex; 278 struct list_head i_trunc_list; 279 u32 i_entries; 280 u32 i_diskflags; 281 u8 i_height; 282 u8 i_depth; 283 }; 284 285 /* 286 * Since i_inode is the first element of struct gfs2_inode, 287 * this is effectively a cast. 288 */ 289 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 290 { 291 return container_of(inode, struct gfs2_inode, i_inode); 292 } 293 294 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 295 { 296 return inode->i_sb->s_fs_info; 297 } 298 299 struct gfs2_file { 300 struct mutex f_fl_mutex; 301 struct gfs2_holder f_fl_gh; 302 }; 303 304 struct gfs2_revoke_replay { 305 struct list_head rr_list; 306 u64 rr_blkno; 307 unsigned int rr_where; 308 }; 309 310 enum { 311 QDF_USER = 0, 312 QDF_CHANGE = 1, 313 QDF_LOCKED = 2, 314 }; 315 316 struct gfs2_quota_data { 317 struct list_head qd_list; 318 struct list_head qd_reclaim; 319 320 atomic_t qd_count; 321 322 u32 qd_id; 323 unsigned long qd_flags; /* QDF_... */ 324 325 s64 qd_change; 326 s64 qd_change_sync; 327 328 unsigned int qd_slot; 329 unsigned int qd_slot_count; 330 331 struct buffer_head *qd_bh; 332 struct gfs2_quota_change *qd_bh_qc; 333 unsigned int qd_bh_count; 334 335 struct gfs2_glock *qd_gl; 336 struct gfs2_quota_lvb qd_qb; 337 338 u64 qd_sync_gen; 339 unsigned long qd_last_warn; 340 }; 341 342 struct gfs2_trans { 343 unsigned long tr_ip; 344 345 unsigned int tr_blocks; 346 unsigned int tr_revokes; 347 unsigned int tr_reserved; 348 349 struct gfs2_holder tr_t_gh; 350 351 int tr_touched; 352 353 unsigned int tr_num_buf; 354 unsigned int tr_num_buf_new; 355 unsigned int tr_num_databuf_new; 356 unsigned int tr_num_buf_rm; 357 unsigned int tr_num_databuf_rm; 358 struct list_head tr_list_buf; 359 360 unsigned int tr_num_revoke; 361 unsigned int tr_num_revoke_rm; 362 }; 363 364 struct gfs2_ail { 365 struct list_head ai_list; 366 367 unsigned int ai_first; 368 struct list_head ai_ail1_list; 369 struct list_head ai_ail2_list; 370 371 u64 ai_sync_gen; 372 }; 373 374 struct gfs2_journal_extent { 375 struct list_head extent_list; 376 377 unsigned int lblock; /* First logical block */ 378 u64 dblock; /* First disk block */ 379 u64 blocks; 380 }; 381 382 struct gfs2_jdesc { 383 struct list_head jd_list; 384 struct list_head extent_list; 385 struct work_struct jd_work; 386 struct inode *jd_inode; 387 unsigned long jd_flags; 388 #define JDF_RECOVERY 1 389 unsigned int jd_jid; 390 unsigned int jd_blocks; 391 }; 392 393 struct gfs2_statfs_change_host { 394 s64 sc_total; 395 s64 sc_free; 396 s64 sc_dinodes; 397 }; 398 399 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 400 #define GFS2_QUOTA_OFF 0 401 #define GFS2_QUOTA_ACCOUNT 1 402 #define GFS2_QUOTA_ON 2 403 404 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 405 #define GFS2_DATA_WRITEBACK 1 406 #define GFS2_DATA_ORDERED 2 407 408 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 409 #define GFS2_ERRORS_WITHDRAW 0 410 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 411 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 412 #define GFS2_ERRORS_PANIC 3 413 414 struct gfs2_args { 415 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 416 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 417 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 418 unsigned int ar_spectator:1; /* Don't get a journal */ 419 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */ 420 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 421 unsigned int ar_localcaching:1; /* Local caching */ 422 unsigned int ar_debug:1; /* Oops on errors */ 423 unsigned int ar_upgrade:1; /* Upgrade ondisk format */ 424 unsigned int ar_posix_acl:1; /* Enable posix acls */ 425 unsigned int ar_quota:2; /* off/account/on */ 426 unsigned int ar_suiddir:1; /* suiddir support */ 427 unsigned int ar_data:2; /* ordered/writeback */ 428 unsigned int ar_meta:1; /* mount metafs */ 429 unsigned int ar_discard:1; /* discard requests */ 430 unsigned int ar_errors:2; /* errors=withdraw | panic */ 431 unsigned int ar_nobarrier:1; /* do not send barriers */ 432 int ar_commit; /* Commit interval */ 433 int ar_statfs_quantum; /* The fast statfs interval */ 434 int ar_quota_quantum; /* The quota interval */ 435 int ar_statfs_percent; /* The % change to force sync */ 436 }; 437 438 struct gfs2_tune { 439 spinlock_t gt_spin; 440 441 unsigned int gt_logd_secs; 442 443 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */ 444 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 445 unsigned int gt_quota_scale_num; /* Numerator */ 446 unsigned int gt_quota_scale_den; /* Denominator */ 447 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 448 unsigned int gt_new_files_jdata; 449 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 450 unsigned int gt_complain_secs; 451 unsigned int gt_statfs_quantum; 452 unsigned int gt_statfs_slow; 453 }; 454 455 enum { 456 SDF_JOURNAL_CHECKED = 0, 457 SDF_JOURNAL_LIVE = 1, 458 SDF_SHUTDOWN = 2, 459 SDF_NOBARRIERS = 3, 460 SDF_NORECOVERY = 4, 461 SDF_DEMOTE = 5, 462 SDF_NOJOURNALID = 6, 463 }; 464 465 #define GFS2_FSNAME_LEN 256 466 467 struct gfs2_inum_host { 468 u64 no_formal_ino; 469 u64 no_addr; 470 }; 471 472 struct gfs2_sb_host { 473 u32 sb_magic; 474 u32 sb_type; 475 u32 sb_format; 476 477 u32 sb_fs_format; 478 u32 sb_multihost_format; 479 u32 sb_bsize; 480 u32 sb_bsize_shift; 481 482 struct gfs2_inum_host sb_master_dir; 483 struct gfs2_inum_host sb_root_dir; 484 485 char sb_lockproto[GFS2_LOCKNAME_LEN]; 486 char sb_locktable[GFS2_LOCKNAME_LEN]; 487 u8 sb_uuid[16]; 488 }; 489 490 /* 491 * lm_mount() return values 492 * 493 * ls_jid - the journal ID this node should use 494 * ls_first - this node is the first to mount the file system 495 * ls_lockspace - lock module's context for this file system 496 * ls_ops - lock module's functions 497 */ 498 499 struct lm_lockstruct { 500 unsigned int ls_jid; 501 unsigned int ls_first; 502 unsigned int ls_first_done; 503 unsigned int ls_nodir; 504 const struct lm_lockops *ls_ops; 505 unsigned long ls_flags; 506 dlm_lockspace_t *ls_dlm; 507 508 int ls_recover_jid_done; 509 int ls_recover_jid_status; 510 }; 511 512 struct gfs2_sbd { 513 struct super_block *sd_vfs; 514 struct kobject sd_kobj; 515 unsigned long sd_flags; /* SDF_... */ 516 struct gfs2_sb_host sd_sb; 517 518 /* Constants computed on mount */ 519 520 u32 sd_fsb2bb; 521 u32 sd_fsb2bb_shift; 522 u32 sd_diptrs; /* Number of pointers in a dinode */ 523 u32 sd_inptrs; /* Number of pointers in a indirect block */ 524 u32 sd_jbsize; /* Size of a journaled data block */ 525 u32 sd_hash_bsize; /* sizeof(exhash block) */ 526 u32 sd_hash_bsize_shift; 527 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 528 u32 sd_qc_per_block; 529 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 530 u32 sd_max_height; /* Max height of a file's metadata tree */ 531 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 532 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 533 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1]; 534 535 struct gfs2_args sd_args; /* Mount arguments */ 536 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 537 538 /* Lock Stuff */ 539 540 struct lm_lockstruct sd_lockstruct; 541 struct gfs2_holder sd_live_gh; 542 struct gfs2_glock *sd_rename_gl; 543 struct gfs2_glock *sd_trans_gl; 544 wait_queue_head_t sd_glock_wait; 545 atomic_t sd_glock_disposal; 546 547 /* Inode Stuff */ 548 549 struct dentry *sd_master_dir; 550 struct dentry *sd_root_dir; 551 552 struct inode *sd_jindex; 553 struct inode *sd_statfs_inode; 554 struct inode *sd_sc_inode; 555 struct inode *sd_qc_inode; 556 struct inode *sd_rindex; 557 struct inode *sd_quota_inode; 558 559 /* StatFS stuff */ 560 561 spinlock_t sd_statfs_spin; 562 struct gfs2_statfs_change_host sd_statfs_master; 563 struct gfs2_statfs_change_host sd_statfs_local; 564 int sd_statfs_force_sync; 565 566 /* Resource group stuff */ 567 568 int sd_rindex_uptodate; 569 spinlock_t sd_rindex_spin; 570 struct mutex sd_rindex_mutex; 571 struct list_head sd_rindex_list; 572 struct list_head sd_rindex_mru_list; 573 struct gfs2_rgrpd *sd_rindex_forward; 574 unsigned int sd_rgrps; 575 576 /* Journal index stuff */ 577 578 struct list_head sd_jindex_list; 579 spinlock_t sd_jindex_spin; 580 struct mutex sd_jindex_mutex; 581 unsigned int sd_journals; 582 583 struct gfs2_jdesc *sd_jdesc; 584 struct gfs2_holder sd_journal_gh; 585 struct gfs2_holder sd_jinode_gh; 586 587 struct gfs2_holder sd_sc_gh; 588 struct gfs2_holder sd_qc_gh; 589 590 /* Daemon stuff */ 591 592 struct task_struct *sd_logd_process; 593 struct task_struct *sd_quotad_process; 594 595 /* Quota stuff */ 596 597 struct list_head sd_quota_list; 598 atomic_t sd_quota_count; 599 struct mutex sd_quota_mutex; 600 wait_queue_head_t sd_quota_wait; 601 struct list_head sd_trunc_list; 602 spinlock_t sd_trunc_lock; 603 604 unsigned int sd_quota_slots; 605 unsigned int sd_quota_chunks; 606 unsigned char **sd_quota_bitmap; 607 608 u64 sd_quota_sync_gen; 609 610 /* Log stuff */ 611 612 spinlock_t sd_log_lock; 613 614 unsigned int sd_log_blks_reserved; 615 unsigned int sd_log_commited_buf; 616 unsigned int sd_log_commited_databuf; 617 int sd_log_commited_revoke; 618 619 atomic_t sd_log_pinned; 620 unsigned int sd_log_num_buf; 621 unsigned int sd_log_num_revoke; 622 unsigned int sd_log_num_rg; 623 unsigned int sd_log_num_databuf; 624 625 struct list_head sd_log_le_buf; 626 struct list_head sd_log_le_revoke; 627 struct list_head sd_log_le_rg; 628 struct list_head sd_log_le_databuf; 629 struct list_head sd_log_le_ordered; 630 631 atomic_t sd_log_thresh1; 632 atomic_t sd_log_thresh2; 633 atomic_t sd_log_blks_free; 634 wait_queue_head_t sd_log_waitq; 635 wait_queue_head_t sd_logd_waitq; 636 637 u64 sd_log_sequence; 638 unsigned int sd_log_head; 639 unsigned int sd_log_tail; 640 int sd_log_idle; 641 642 struct rw_semaphore sd_log_flush_lock; 643 atomic_t sd_log_in_flight; 644 wait_queue_head_t sd_log_flush_wait; 645 646 unsigned int sd_log_flush_head; 647 u64 sd_log_flush_wrapped; 648 649 struct list_head sd_ail1_list; 650 struct list_head sd_ail2_list; 651 u64 sd_ail_sync_gen; 652 653 /* Replay stuff */ 654 655 struct list_head sd_revoke_list; 656 unsigned int sd_replay_tail; 657 658 unsigned int sd_found_blocks; 659 unsigned int sd_found_revokes; 660 unsigned int sd_replayed_blocks; 661 662 /* For quiescing the filesystem */ 663 664 struct gfs2_holder sd_freeze_gh; 665 struct mutex sd_freeze_lock; 666 unsigned int sd_freeze_count; 667 668 char sd_fsname[GFS2_FSNAME_LEN]; 669 char sd_table_name[GFS2_FSNAME_LEN]; 670 char sd_proto_name[GFS2_FSNAME_LEN]; 671 672 /* Debugging crud */ 673 674 unsigned long sd_last_warning; 675 struct dentry *debugfs_dir; /* debugfs directory */ 676 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 677 }; 678 679 #endif /* __INCORE_DOT_H__ */ 680 681