1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 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 15 #define DIO_WAIT 0x00000010 16 #define DIO_METADATA 0x00000020 17 #define DIO_ALL 0x00000100 18 19 struct gfs2_log_operations; 20 struct gfs2_log_element; 21 struct gfs2_holder; 22 struct gfs2_glock; 23 struct gfs2_quota_data; 24 struct gfs2_trans; 25 struct gfs2_ail; 26 struct gfs2_jdesc; 27 struct gfs2_sbd; 28 29 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 30 31 struct gfs2_log_header_host { 32 u64 lh_sequence; /* Sequence number of this transaction */ 33 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 34 u32 lh_tail; /* Block number of log tail */ 35 u32 lh_blkno; 36 u32 lh_hash; 37 }; 38 39 /* 40 * Structure of operations that are associated with each 41 * type of element in the log. 42 */ 43 44 struct gfs2_log_operations { 45 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le); 46 void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 47 void (*lo_before_commit) (struct gfs2_sbd *sdp); 48 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai); 49 void (*lo_before_scan) (struct gfs2_jdesc *jd, 50 struct gfs2_log_header_host *head, int pass); 51 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 52 struct gfs2_log_descriptor *ld, __be64 *ptr, 53 int pass); 54 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 55 const char *lo_name; 56 }; 57 58 struct gfs2_log_element { 59 struct list_head le_list; 60 const struct gfs2_log_operations *le_ops; 61 }; 62 63 struct gfs2_bitmap { 64 struct buffer_head *bi_bh; 65 char *bi_clone; 66 u32 bi_offset; 67 u32 bi_start; 68 u32 bi_len; 69 }; 70 71 struct gfs2_rgrp_host { 72 u32 rg_flags; 73 u32 rg_free; 74 u32 rg_dinodes; 75 u64 rg_igeneration; 76 }; 77 78 struct gfs2_rgrpd { 79 struct list_head rd_list; /* Link with superblock */ 80 struct list_head rd_list_mru; 81 struct list_head rd_recent; /* Recently used rgrps */ 82 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 83 u64 rd_addr; /* grp block disk address */ 84 u64 rd_data0; /* first data location */ 85 u32 rd_length; /* length of rgrp header in fs blocks */ 86 u32 rd_data; /* num of data blocks in rgrp */ 87 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 88 struct gfs2_rgrp_host rd_rg; 89 u64 rd_rg_vn; 90 struct gfs2_bitmap *rd_bits; 91 unsigned int rd_bh_count; 92 struct mutex rd_mutex; 93 u32 rd_free_clone; 94 struct gfs2_log_element rd_le; 95 u32 rd_last_alloc_data; 96 u32 rd_last_alloc_meta; 97 struct gfs2_sbd *rd_sbd; 98 unsigned long rd_flags; 99 #define GFS2_RDF_CHECK 0x0001 /* Need to check for unlinked inodes */ 100 }; 101 102 enum gfs2_state_bits { 103 BH_Pinned = BH_PrivateStart, 104 BH_Escaped = BH_PrivateStart + 1, 105 }; 106 107 BUFFER_FNS(Pinned, pinned) 108 TAS_BUFFER_FNS(Pinned, pinned) 109 BUFFER_FNS(Escaped, escaped) 110 TAS_BUFFER_FNS(Escaped, escaped) 111 112 struct gfs2_bufdata { 113 struct buffer_head *bd_bh; 114 struct gfs2_glock *bd_gl; 115 116 struct list_head bd_list_tr; 117 struct gfs2_log_element bd_le; 118 119 struct gfs2_ail *bd_ail; 120 struct list_head bd_ail_st_list; 121 struct list_head bd_ail_gl_list; 122 }; 123 124 struct gfs2_glock_operations { 125 void (*go_xmote_th) (struct gfs2_glock *gl); 126 void (*go_xmote_bh) (struct gfs2_glock *gl); 127 void (*go_drop_th) (struct gfs2_glock *gl); 128 void (*go_inval) (struct gfs2_glock *gl, int flags); 129 int (*go_demote_ok) (struct gfs2_glock *gl); 130 int (*go_lock) (struct gfs2_holder *gh); 131 void (*go_unlock) (struct gfs2_holder *gh); 132 const int go_type; 133 }; 134 135 enum { 136 /* Actions */ 137 HIF_MUTEX = 0, 138 HIF_PROMOTE = 1, 139 140 /* States */ 141 HIF_HOLDER = 6, 142 HIF_FIRST = 7, 143 HIF_ABORTED = 9, 144 HIF_WAIT = 10, 145 }; 146 147 struct gfs2_holder { 148 struct list_head gh_list; 149 150 struct gfs2_glock *gh_gl; 151 pid_t gh_owner_pid; 152 unsigned int gh_state; 153 unsigned gh_flags; 154 155 int gh_error; 156 unsigned long gh_iflags; 157 unsigned long gh_ip; 158 }; 159 160 enum { 161 GLF_LOCK = 1, 162 GLF_STICKY = 2, 163 GLF_DEMOTE = 3, 164 GLF_DIRTY = 5, 165 }; 166 167 struct gfs2_glock { 168 struct hlist_node gl_list; 169 unsigned long gl_flags; /* GLF_... */ 170 struct lm_lockname gl_name; 171 atomic_t gl_ref; 172 173 spinlock_t gl_spin; 174 175 unsigned int gl_state; 176 unsigned int gl_hash; 177 unsigned int gl_demote_state; /* state requested by remote node */ 178 unsigned long gl_demote_time; /* time of first demote request */ 179 pid_t gl_owner_pid; 180 unsigned long gl_ip; 181 struct list_head gl_holders; 182 struct list_head gl_waiters1; /* HIF_MUTEX */ 183 struct list_head gl_waiters3; /* HIF_PROMOTE */ 184 185 const struct gfs2_glock_operations *gl_ops; 186 187 struct gfs2_holder *gl_req_gh; 188 gfs2_glop_bh_t gl_req_bh; 189 190 void *gl_lock; 191 char *gl_lvb; 192 atomic_t gl_lvb_count; 193 194 u64 gl_vn; 195 unsigned long gl_stamp; 196 void *gl_object; 197 198 struct list_head gl_reclaim; 199 200 struct gfs2_sbd *gl_sbd; 201 202 struct inode *gl_aspace; 203 struct gfs2_log_element gl_le; 204 struct list_head gl_ail_list; 205 atomic_t gl_ail_count; 206 }; 207 208 struct gfs2_alloc { 209 /* Quota stuff */ 210 211 struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; 212 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; 213 unsigned int al_qd_num; 214 215 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ 216 u32 al_alloced; /* Filled in by gfs2_alloc_*() */ 217 218 /* Filled in by gfs2_inplace_reserve() */ 219 220 unsigned int al_line; 221 char *al_file; 222 struct gfs2_holder al_ri_gh; 223 struct gfs2_holder al_rgd_gh; 224 struct gfs2_rgrpd *al_rgd; 225 226 }; 227 228 enum { 229 GIF_INVALID = 0, 230 GIF_QD_LOCKED = 1, 231 GIF_PAGED = 2, 232 GIF_SW_PAGED = 3, 233 }; 234 235 struct gfs2_dinode_host { 236 u64 di_size; /* number of bytes in file */ 237 u64 di_blocks; /* number of blocks in file */ 238 u64 di_goal_meta; /* rgrp to alloc from next */ 239 u64 di_goal_data; /* data block goal */ 240 u64 di_generation; /* generation number for NFS */ 241 u32 di_flags; /* GFS2_DIF_... */ 242 u16 di_height; /* height of metadata */ 243 /* These only apply to directories */ 244 u16 di_depth; /* Number of bits in the table */ 245 u32 di_entries; /* The number of entries in the directory */ 246 u64 di_eattr; /* extended attribute block number */ 247 }; 248 249 struct gfs2_inode { 250 struct inode i_inode; 251 u64 i_no_addr; 252 u64 i_no_formal_ino; 253 unsigned long i_flags; /* GIF_... */ 254 255 struct gfs2_dinode_host i_di; /* To be replaced by ref to block */ 256 257 struct gfs2_glock *i_gl; /* Move into i_gh? */ 258 struct gfs2_holder i_iopen_gh; 259 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 260 struct gfs2_alloc i_alloc; 261 u64 i_last_rg_alloc; 262 263 spinlock_t i_spin; 264 struct rw_semaphore i_rw_mutex; 265 unsigned long i_last_pfault; 266 267 struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT]; 268 }; 269 270 /* 271 * Since i_inode is the first element of struct gfs2_inode, 272 * this is effectively a cast. 273 */ 274 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 275 { 276 return container_of(inode, struct gfs2_inode, i_inode); 277 } 278 279 /* To be removed? */ 280 static inline struct gfs2_sbd *GFS2_SB(struct inode *inode) 281 { 282 return inode->i_sb->s_fs_info; 283 } 284 285 enum { 286 GFF_DID_DIRECT_ALLOC = 0, 287 GFF_EXLOCK = 1, 288 }; 289 290 struct gfs2_file { 291 unsigned long f_flags; /* GFF_... */ 292 struct mutex f_fl_mutex; 293 struct gfs2_holder f_fl_gh; 294 }; 295 296 struct gfs2_revoke { 297 struct gfs2_log_element rv_le; 298 u64 rv_blkno; 299 }; 300 301 struct gfs2_revoke_replay { 302 struct list_head rr_list; 303 u64 rr_blkno; 304 unsigned int rr_where; 305 }; 306 307 enum { 308 QDF_USER = 0, 309 QDF_CHANGE = 1, 310 QDF_LOCKED = 2, 311 }; 312 313 struct gfs2_quota_data { 314 struct list_head qd_list; 315 unsigned int qd_count; 316 317 u32 qd_id; 318 unsigned long qd_flags; /* QDF_... */ 319 320 s64 qd_change; 321 s64 qd_change_sync; 322 323 unsigned int qd_slot; 324 unsigned int qd_slot_count; 325 326 struct buffer_head *qd_bh; 327 struct gfs2_quota_change *qd_bh_qc; 328 unsigned int qd_bh_count; 329 330 struct gfs2_glock *qd_gl; 331 struct gfs2_quota_lvb qd_qb; 332 333 u64 qd_sync_gen; 334 unsigned long qd_last_warn; 335 unsigned long qd_last_touched; 336 }; 337 338 struct gfs2_log_buf { 339 struct list_head lb_list; 340 struct buffer_head *lb_bh; 341 struct buffer_head *lb_real; 342 }; 343 344 struct gfs2_trans { 345 unsigned long tr_ip; 346 347 unsigned int tr_blocks; 348 unsigned int tr_revokes; 349 unsigned int tr_reserved; 350 351 struct gfs2_holder tr_t_gh; 352 353 int tr_touched; 354 355 unsigned int tr_num_buf; 356 unsigned int tr_num_buf_new; 357 unsigned int tr_num_databuf_new; 358 unsigned int tr_num_buf_rm; 359 unsigned int tr_num_databuf_rm; 360 struct list_head tr_list_buf; 361 362 unsigned int tr_num_revoke; 363 unsigned int tr_num_revoke_rm; 364 }; 365 366 struct gfs2_ail { 367 struct list_head ai_list; 368 369 unsigned int ai_first; 370 struct list_head ai_ail1_list; 371 struct list_head ai_ail2_list; 372 373 u64 ai_sync_gen; 374 }; 375 376 struct gfs2_jdesc { 377 struct list_head jd_list; 378 379 struct inode *jd_inode; 380 unsigned int jd_jid; 381 int jd_dirty; 382 383 unsigned int jd_blocks; 384 }; 385 386 struct gfs2_statfs_change_host { 387 s64 sc_total; 388 s64 sc_free; 389 s64 sc_dinodes; 390 }; 391 392 #define GFS2_GLOCKD_DEFAULT 1 393 #define GFS2_GLOCKD_MAX 16 394 395 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 396 #define GFS2_QUOTA_OFF 0 397 #define GFS2_QUOTA_ACCOUNT 1 398 #define GFS2_QUOTA_ON 2 399 400 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 401 #define GFS2_DATA_WRITEBACK 1 402 #define GFS2_DATA_ORDERED 2 403 404 struct gfs2_args { 405 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 406 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 407 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 408 int ar_spectator; /* Don't get a journal because we're always RO */ 409 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */ 410 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */ 411 int ar_localcaching; /* Local-style caching (dangerous on multihost) */ 412 int ar_debug; /* Oops on errors instead of trying to be graceful */ 413 int ar_upgrade; /* Upgrade ondisk/multihost format */ 414 unsigned int ar_num_glockd; /* Number of glockd threads */ 415 int ar_posix_acl; /* Enable posix acls */ 416 int ar_quota; /* off/account/on */ 417 int ar_suiddir; /* suiddir support */ 418 int ar_data; /* ordered/writeback */ 419 }; 420 421 struct gfs2_tune { 422 spinlock_t gt_spin; 423 424 unsigned int gt_ilimit; 425 unsigned int gt_ilimit_tries; 426 unsigned int gt_ilimit_min; 427 unsigned int gt_demote_secs; /* Cache retention for unheld glock */ 428 unsigned int gt_incore_log_blocks; 429 unsigned int gt_log_flush_secs; 430 unsigned int gt_jindex_refresh_secs; /* Check for new journal index */ 431 432 unsigned int gt_scand_secs; 433 unsigned int gt_recoverd_secs; 434 unsigned int gt_logd_secs; 435 unsigned int gt_quotad_secs; 436 437 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */ 438 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 439 unsigned int gt_quota_scale_num; /* Numerator */ 440 unsigned int gt_quota_scale_den; /* Denominator */ 441 unsigned int gt_quota_cache_secs; 442 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 443 unsigned int gt_atime_quantum; /* Min secs between atime updates */ 444 unsigned int gt_new_files_jdata; 445 unsigned int gt_new_files_directio; 446 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 447 unsigned int gt_lockdump_size; 448 unsigned int gt_stall_secs; /* Detects trouble! */ 449 unsigned int gt_complain_secs; 450 unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */ 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_NOATIME = 3, 460 }; 461 462 #define GFS2_FSNAME_LEN 256 463 464 struct gfs2_inum_host { 465 u64 no_formal_ino; 466 u64 no_addr; 467 }; 468 469 struct gfs2_sb_host { 470 u32 sb_magic; 471 u32 sb_type; 472 u32 sb_format; 473 474 u32 sb_fs_format; 475 u32 sb_multihost_format; 476 u32 sb_bsize; 477 u32 sb_bsize_shift; 478 479 struct gfs2_inum_host sb_master_dir; 480 struct gfs2_inum_host sb_root_dir; 481 482 char sb_lockproto[GFS2_LOCKNAME_LEN]; 483 char sb_locktable[GFS2_LOCKNAME_LEN]; 484 }; 485 486 struct gfs2_sbd { 487 struct super_block *sd_vfs; 488 struct super_block *sd_vfs_meta; 489 struct kobject sd_kobj; 490 unsigned long sd_flags; /* SDF_... */ 491 struct gfs2_sb_host sd_sb; 492 493 /* Constants computed on mount */ 494 495 u32 sd_fsb2bb; 496 u32 sd_fsb2bb_shift; 497 u32 sd_diptrs; /* Number of pointers in a dinode */ 498 u32 sd_inptrs; /* Number of pointers in a indirect block */ 499 u32 sd_jbsize; /* Size of a journaled data block */ 500 u32 sd_hash_bsize; /* sizeof(exhash block) */ 501 u32 sd_hash_bsize_shift; 502 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 503 u32 sd_qc_per_block; 504 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 505 u32 sd_max_height; /* Max height of a file's metadata tree */ 506 u64 sd_heightsize[GFS2_MAX_META_HEIGHT]; 507 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 508 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT]; 509 510 struct gfs2_args sd_args; /* Mount arguments */ 511 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 512 513 /* Lock Stuff */ 514 515 struct lm_lockstruct sd_lockstruct; 516 struct list_head sd_reclaim_list; 517 spinlock_t sd_reclaim_lock; 518 wait_queue_head_t sd_reclaim_wq; 519 atomic_t sd_reclaim_count; 520 struct gfs2_holder sd_live_gh; 521 struct gfs2_glock *sd_rename_gl; 522 struct gfs2_glock *sd_trans_gl; 523 524 /* Inode Stuff */ 525 526 struct inode *sd_master_dir; 527 struct inode *sd_jindex; 528 struct inode *sd_inum_inode; 529 struct inode *sd_statfs_inode; 530 struct inode *sd_ir_inode; 531 struct inode *sd_sc_inode; 532 struct inode *sd_qc_inode; 533 struct inode *sd_rindex; 534 struct inode *sd_quota_inode; 535 536 /* Inum stuff */ 537 538 struct mutex sd_inum_mutex; 539 540 /* StatFS stuff */ 541 542 spinlock_t sd_statfs_spin; 543 struct mutex sd_statfs_mutex; 544 struct gfs2_statfs_change_host sd_statfs_master; 545 struct gfs2_statfs_change_host sd_statfs_local; 546 unsigned long sd_statfs_sync_time; 547 548 /* Resource group stuff */ 549 550 u64 sd_rindex_vn; 551 spinlock_t sd_rindex_spin; 552 struct mutex sd_rindex_mutex; 553 struct list_head sd_rindex_list; 554 struct list_head sd_rindex_mru_list; 555 struct list_head sd_rindex_recent_list; 556 struct gfs2_rgrpd *sd_rindex_forward; 557 unsigned int sd_rgrps; 558 559 /* Journal index stuff */ 560 561 struct list_head sd_jindex_list; 562 spinlock_t sd_jindex_spin; 563 struct mutex sd_jindex_mutex; 564 unsigned int sd_journals; 565 unsigned long sd_jindex_refresh_time; 566 567 struct gfs2_jdesc *sd_jdesc; 568 struct gfs2_holder sd_journal_gh; 569 struct gfs2_holder sd_jinode_gh; 570 571 struct gfs2_holder sd_ir_gh; 572 struct gfs2_holder sd_sc_gh; 573 struct gfs2_holder sd_qc_gh; 574 575 /* Daemon stuff */ 576 577 struct task_struct *sd_scand_process; 578 struct task_struct *sd_recoverd_process; 579 struct task_struct *sd_logd_process; 580 struct task_struct *sd_quotad_process; 581 struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX]; 582 unsigned int sd_glockd_num; 583 584 /* Quota stuff */ 585 586 struct list_head sd_quota_list; 587 atomic_t sd_quota_count; 588 spinlock_t sd_quota_spin; 589 struct mutex sd_quota_mutex; 590 591 unsigned int sd_quota_slots; 592 unsigned int sd_quota_chunks; 593 unsigned char **sd_quota_bitmap; 594 595 u64 sd_quota_sync_gen; 596 unsigned long sd_quota_sync_time; 597 598 /* Log stuff */ 599 600 spinlock_t sd_log_lock; 601 602 unsigned int sd_log_blks_reserved; 603 unsigned int sd_log_commited_buf; 604 unsigned int sd_log_commited_databuf; 605 unsigned int sd_log_commited_revoke; 606 607 unsigned int sd_log_num_gl; 608 unsigned int sd_log_num_buf; 609 unsigned int sd_log_num_revoke; 610 unsigned int sd_log_num_rg; 611 unsigned int sd_log_num_databuf; 612 unsigned int sd_log_num_jdata; 613 614 struct list_head sd_log_le_gl; 615 struct list_head sd_log_le_buf; 616 struct list_head sd_log_le_revoke; 617 struct list_head sd_log_le_rg; 618 struct list_head sd_log_le_databuf; 619 620 unsigned int sd_log_blks_free; 621 struct mutex sd_log_reserve_mutex; 622 623 u64 sd_log_sequence; 624 unsigned int sd_log_head; 625 unsigned int sd_log_tail; 626 int sd_log_idle; 627 628 unsigned long sd_log_flush_time; 629 struct rw_semaphore sd_log_flush_lock; 630 struct list_head sd_log_flush_list; 631 632 unsigned int sd_log_flush_head; 633 u64 sd_log_flush_wrapped; 634 635 struct list_head sd_ail1_list; 636 struct list_head sd_ail2_list; 637 u64 sd_ail_sync_gen; 638 639 /* Replay stuff */ 640 641 struct list_head sd_revoke_list; 642 unsigned int sd_replay_tail; 643 644 unsigned int sd_found_blocks; 645 unsigned int sd_found_revokes; 646 unsigned int sd_replayed_blocks; 647 648 /* For quiescing the filesystem */ 649 650 struct gfs2_holder sd_freeze_gh; 651 struct mutex sd_freeze_lock; 652 unsigned int sd_freeze_count; 653 654 /* Counters */ 655 656 atomic_t sd_glock_count; 657 atomic_t sd_glock_held_count; 658 atomic_t sd_inode_count; 659 atomic_t sd_reclaimed; 660 661 char sd_fsname[GFS2_FSNAME_LEN]; 662 char sd_table_name[GFS2_FSNAME_LEN]; 663 char sd_proto_name[GFS2_FSNAME_LEN]; 664 665 /* Debugging crud */ 666 667 unsigned long sd_last_warning; 668 struct vfsmount *sd_gfs2mnt; 669 struct dentry *debugfs_dir; /* debugfs directory */ 670 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 671 }; 672 673 #endif /* __INCORE_DOT_H__ */ 674 675