1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * ocfs2.h 5 * 6 * Defines macros and structures used in OCFS2 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #ifndef OCFS2_H 27 #define OCFS2_H 28 29 #include <linux/spinlock.h> 30 #include <linux/sched.h> 31 #include <linux/wait.h> 32 #include <linux/list.h> 33 #include <linux/llist.h> 34 #include <linux/rbtree.h> 35 #include <linux/workqueue.h> 36 #include <linux/kref.h> 37 #include <linux/mutex.h> 38 #include <linux/lockdep.h> 39 #include <linux/jbd2.h> 40 41 /* For union ocfs2_dlm_lksb */ 42 #include "stackglue.h" 43 44 #include "ocfs2_fs.h" 45 #include "ocfs2_lockid.h" 46 #include "ocfs2_ioctl.h" 47 48 /* For struct ocfs2_blockcheck_stats */ 49 #include "blockcheck.h" 50 51 #include "reservations.h" 52 53 /* Caching of metadata buffers */ 54 55 /* Most user visible OCFS2 inodes will have very few pieces of 56 * metadata, but larger files (including bitmaps, etc) must be taken 57 * into account when designing an access scheme. We allow a small 58 * amount of inlined blocks to be stored on an array and grow the 59 * structure into a rb tree when necessary. */ 60 #define OCFS2_CACHE_INFO_MAX_ARRAY 2 61 62 /* Flags for ocfs2_caching_info */ 63 64 enum ocfs2_caching_info_flags { 65 /* Indicates that the metadata cache is using the inline array */ 66 OCFS2_CACHE_FL_INLINE = 1<<1, 67 }; 68 69 struct ocfs2_caching_operations; 70 struct ocfs2_caching_info { 71 /* 72 * The parent structure provides the locks, but because the 73 * parent structure can differ, it provides locking operations 74 * to struct ocfs2_caching_info. 75 */ 76 const struct ocfs2_caching_operations *ci_ops; 77 78 /* next two are protected by trans_inc_lock */ 79 /* which transaction were we created on? Zero if none. */ 80 unsigned long ci_created_trans; 81 /* last transaction we were a part of. */ 82 unsigned long ci_last_trans; 83 84 /* Cache structures */ 85 unsigned int ci_flags; 86 unsigned int ci_num_cached; 87 union { 88 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; 89 struct rb_root ci_tree; 90 } ci_cache; 91 }; 92 /* 93 * Need this prototype here instead of in uptodate.h because journal.h 94 * uses it. 95 */ 96 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); 97 98 /* this limits us to 256 nodes 99 * if we need more, we can do a kmalloc for the map */ 100 #define OCFS2_NODE_MAP_MAX_NODES 256 101 struct ocfs2_node_map { 102 u16 num_nodes; 103 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 104 }; 105 106 enum ocfs2_ast_action { 107 OCFS2_AST_INVALID = 0, 108 OCFS2_AST_ATTACH, 109 OCFS2_AST_CONVERT, 110 OCFS2_AST_DOWNCONVERT, 111 }; 112 113 /* actions for an unlockast function to take. */ 114 enum ocfs2_unlock_action { 115 OCFS2_UNLOCK_INVALID = 0, 116 OCFS2_UNLOCK_CANCEL_CONVERT, 117 OCFS2_UNLOCK_DROP_LOCK, 118 }; 119 120 /* ocfs2_lock_res->l_flags flags. */ 121 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized 122 * the lvb */ 123 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in 124 * dlm_lock */ 125 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to 126 * downconvert*/ 127 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ 128 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) 129 #define OCFS2_LOCK_REFRESHING (0x00000020) 130 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization 131 * for shutdown paths */ 132 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track 133 * when to skip queueing 134 * a lock because it's 135 * about to be 136 * dropped. */ 137 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ 138 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ 139 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a 140 call to dlm_lock. Only 141 exists with BUSY set. */ 142 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread 143 * from downconverting 144 * before the upconvert 145 * has completed */ 146 147 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster 148 * lock has already 149 * returned, do not block 150 * dc thread from 151 * downconverting */ 152 153 struct ocfs2_lock_res_ops; 154 155 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 156 157 #ifdef CONFIG_OCFS2_FS_STATS 158 struct ocfs2_lock_stats { 159 u64 ls_total; /* Total wait in NSEC */ 160 u32 ls_gets; /* Num acquires */ 161 u32 ls_fail; /* Num failed acquires */ 162 163 /* Storing max wait in usecs saves 24 bytes per inode */ 164 u32 ls_max; /* Max wait in USEC */ 165 }; 166 #endif 167 168 struct ocfs2_lock_res { 169 void *l_priv; 170 struct ocfs2_lock_res_ops *l_ops; 171 172 173 struct list_head l_blocked_list; 174 struct list_head l_mask_waiters; 175 176 unsigned long l_flags; 177 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 178 unsigned int l_ro_holders; 179 unsigned int l_ex_holders; 180 signed char l_level; 181 signed char l_requested; 182 signed char l_blocking; 183 184 /* Data packed - type enum ocfs2_lock_type */ 185 unsigned char l_type; 186 187 /* used from AST/BAST funcs. */ 188 /* Data packed - enum type ocfs2_ast_action */ 189 unsigned char l_action; 190 /* Data packed - enum type ocfs2_unlock_action */ 191 unsigned char l_unlock_action; 192 unsigned int l_pending_gen; 193 194 spinlock_t l_lock; 195 196 struct ocfs2_dlm_lksb l_lksb; 197 198 wait_queue_head_t l_event; 199 200 struct list_head l_debug_list; 201 202 #ifdef CONFIG_OCFS2_FS_STATS 203 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 204 u32 l_lock_refresh; /* Disk refreshes */ 205 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 206 #endif 207 #ifdef CONFIG_DEBUG_LOCK_ALLOC 208 struct lockdep_map l_lockdep_map; 209 #endif 210 }; 211 212 enum ocfs2_orphan_scan_state { 213 ORPHAN_SCAN_ACTIVE, 214 ORPHAN_SCAN_INACTIVE 215 }; 216 217 struct ocfs2_orphan_scan { 218 struct mutex os_lock; 219 struct ocfs2_super *os_osb; 220 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ 221 struct delayed_work os_orphan_scan_work; 222 struct timespec os_scantime; /* time this node ran the scan */ 223 u32 os_count; /* tracks node specific scans */ 224 u32 os_seqno; /* tracks cluster wide scans */ 225 atomic_t os_state; /* ACTIVE or INACTIVE */ 226 }; 227 228 struct ocfs2_dlm_debug { 229 struct kref d_refcnt; 230 struct dentry *d_locking_state; 231 struct list_head d_lockres_tracking; 232 }; 233 234 enum ocfs2_vol_state 235 { 236 VOLUME_INIT = 0, 237 VOLUME_MOUNTED, 238 VOLUME_MOUNTED_QUOTAS, 239 VOLUME_DISMOUNTED, 240 VOLUME_DISABLED 241 }; 242 243 struct ocfs2_alloc_stats 244 { 245 atomic_t moves; 246 atomic_t local_data; 247 atomic_t bitmap_data; 248 atomic_t bg_allocs; 249 atomic_t bg_extends; 250 }; 251 252 enum ocfs2_local_alloc_state 253 { 254 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 255 * this mountpoint. */ 256 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 257 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 258 * of bits has been reduced. */ 259 OCFS2_LA_DISABLED /* Local alloc has temporarily been 260 * disabled. */ 261 }; 262 263 enum ocfs2_mount_options 264 { 265 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 266 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 267 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 268 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 269 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 270 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 271 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 272 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 273 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 274 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 275 control lists */ 276 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 277 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 278 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 279 writes */ 280 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 281 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 282 }; 283 284 #define OCFS2_OSB_SOFT_RO 0x0001 285 #define OCFS2_OSB_HARD_RO 0x0002 286 #define OCFS2_OSB_ERROR_FS 0x0004 287 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 288 289 struct ocfs2_journal; 290 struct ocfs2_slot_info; 291 struct ocfs2_recovery_map; 292 struct ocfs2_replay_map; 293 struct ocfs2_quota_recovery; 294 struct ocfs2_super 295 { 296 struct task_struct *commit_task; 297 struct super_block *sb; 298 struct inode *root_inode; 299 struct inode *sys_root_inode; 300 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 301 struct inode **local_system_inodes; 302 303 struct ocfs2_slot_info *slot_info; 304 305 u32 *slot_recovery_generations; 306 307 spinlock_t node_map_lock; 308 309 u64 root_blkno; 310 u64 system_dir_blkno; 311 u64 bitmap_blkno; 312 u32 bitmap_cpg; 313 u8 *uuid; 314 char *uuid_str; 315 u32 uuid_hash; 316 u8 *vol_label; 317 u64 first_cluster_group_blkno; 318 u32 fs_generation; 319 320 u32 s_feature_compat; 321 u32 s_feature_incompat; 322 u32 s_feature_ro_compat; 323 324 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 325 * Could protect more on osb as it's very short lived. 326 */ 327 spinlock_t osb_lock; 328 u32 s_next_generation; 329 unsigned long osb_flags; 330 s16 s_inode_steal_slot; 331 s16 s_meta_steal_slot; 332 atomic_t s_num_inodes_stolen; 333 atomic_t s_num_meta_stolen; 334 335 unsigned long s_mount_opt; 336 unsigned int s_atime_quantum; 337 338 unsigned int max_slots; 339 unsigned int node_num; 340 int slot_num; 341 int preferred_slot; 342 int s_sectsize_bits; 343 int s_clustersize; 344 int s_clustersize_bits; 345 unsigned int s_xattr_inline_size; 346 347 atomic_t vol_state; 348 struct mutex recovery_lock; 349 struct ocfs2_recovery_map *recovery_map; 350 struct ocfs2_replay_map *replay_map; 351 struct task_struct *recovery_thread_task; 352 int disable_recovery; 353 wait_queue_head_t checkpoint_event; 354 struct ocfs2_journal *journal; 355 unsigned long osb_commit_interval; 356 357 struct delayed_work la_enable_wq; 358 359 /* 360 * Must hold local alloc i_mutex and osb->osb_lock to change 361 * local_alloc_bits. Reads can be done under either lock. 362 */ 363 unsigned int local_alloc_bits; 364 unsigned int local_alloc_default_bits; 365 /* osb_clusters_at_boot can become stale! Do not trust it to 366 * be up to date. */ 367 unsigned int osb_clusters_at_boot; 368 369 enum ocfs2_local_alloc_state local_alloc_state; /* protected 370 * by osb_lock */ 371 372 struct buffer_head *local_alloc_bh; 373 374 u64 la_last_gd; 375 376 struct ocfs2_reservation_map osb_la_resmap; 377 378 unsigned int osb_resv_level; 379 unsigned int osb_dir_resv_level; 380 381 /* Next three fields are for local node slot recovery during 382 * mount. */ 383 int dirty; 384 struct ocfs2_dinode *local_alloc_copy; 385 struct ocfs2_quota_recovery *quota_rec; 386 387 struct ocfs2_blockcheck_stats osb_ecc_stats; 388 struct ocfs2_alloc_stats alloc_stats; 389 char dev_str[20]; /* "major,minor" of the device */ 390 391 u8 osb_stackflags; 392 393 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 394 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 395 struct ocfs2_cluster_connection *cconn; 396 struct ocfs2_lock_res osb_super_lockres; 397 struct ocfs2_lock_res osb_rename_lockres; 398 struct ocfs2_lock_res osb_nfs_sync_lockres; 399 struct ocfs2_dlm_debug *osb_dlm_debug; 400 401 struct dentry *osb_debug_root; 402 struct dentry *osb_ctxt; 403 404 wait_queue_head_t recovery_event; 405 406 spinlock_t dc_task_lock; 407 struct task_struct *dc_task; 408 wait_queue_head_t dc_event; 409 unsigned long dc_wake_sequence; 410 unsigned long dc_work_sequence; 411 412 /* 413 * Any thread can add locks to the list, but the downconvert 414 * thread is the only one allowed to remove locks. Any change 415 * to this rule requires updating 416 * ocfs2_downconvert_thread_do_work(). 417 */ 418 struct list_head blocked_lock_list; 419 unsigned long blocked_lock_count; 420 421 /* List of dquot structures to drop last reference to */ 422 struct llist_head dquot_drop_list; 423 struct work_struct dquot_drop_work; 424 425 wait_queue_head_t osb_mount_event; 426 427 /* Truncate log info */ 428 struct inode *osb_tl_inode; 429 struct buffer_head *osb_tl_bh; 430 struct delayed_work osb_truncate_log_wq; 431 atomic_t osb_tl_disable; 432 /* 433 * How many clusters in our truncate log. 434 * It must be protected by osb_tl_inode->i_mutex. 435 */ 436 unsigned int truncated_clusters; 437 438 struct ocfs2_node_map osb_recovering_orphan_dirs; 439 unsigned int *osb_orphan_wipes; 440 wait_queue_head_t osb_wipe_event; 441 442 struct ocfs2_orphan_scan osb_orphan_scan; 443 444 /* used to protect metaecc calculation check of xattr. */ 445 spinlock_t osb_xattr_lock; 446 447 unsigned int osb_dx_mask; 448 u32 osb_dx_seed[4]; 449 450 /* the group we used to allocate inodes. */ 451 u64 osb_inode_alloc_group; 452 453 /* rb tree root for refcount lock. */ 454 struct rb_root osb_rf_lock_tree; 455 struct ocfs2_refcount_tree *osb_ref_tree_lru; 456 457 struct mutex system_file_mutex; 458 }; 459 460 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 461 462 /* Useful typedef for passing around journal access functions */ 463 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 464 struct ocfs2_caching_info *ci, 465 struct buffer_head *bh, int type); 466 467 static inline int ocfs2_should_order_data(struct inode *inode) 468 { 469 if (!S_ISREG(inode->i_mode)) 470 return 0; 471 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 472 return 0; 473 return 1; 474 } 475 476 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 477 { 478 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 479 return 1; 480 return 0; 481 } 482 483 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 484 { 485 /* 486 * Support for sparse files is a pre-requisite 487 */ 488 if (!ocfs2_sparse_alloc(osb)) 489 return 0; 490 491 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 492 return 1; 493 return 0; 494 } 495 496 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 497 { 498 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 499 return 1; 500 return 0; 501 } 502 503 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 504 { 505 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 506 return 1; 507 return 0; 508 } 509 510 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 511 { 512 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 513 return 1; 514 return 0; 515 } 516 517 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 518 { 519 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 520 return 1; 521 return 0; 522 } 523 524 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 525 { 526 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 527 return 1; 528 return 0; 529 } 530 531 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 532 { 533 if (ocfs2_supports_indexed_dirs(osb)) 534 return OCFS2_DX_LINK_MAX; 535 return OCFS2_LINK_MAX; 536 } 537 538 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 539 { 540 u32 nlink = le16_to_cpu(di->i_links_count); 541 u32 hi = le16_to_cpu(di->i_links_count_hi); 542 543 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 544 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 545 546 return nlink; 547 } 548 549 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 550 { 551 u16 lo, hi; 552 553 lo = nlink; 554 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 555 556 di->i_links_count = cpu_to_le16(lo); 557 di->i_links_count_hi = cpu_to_le16(hi); 558 } 559 560 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 561 { 562 u32 links = ocfs2_read_links_count(di); 563 564 links += n; 565 566 ocfs2_set_links_count(di, links); 567 } 568 569 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 570 { 571 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 572 return 1; 573 return 0; 574 } 575 576 /* set / clear functions because cluster events can make these happen 577 * in parallel so we want the transitions to be atomic. this also 578 * means that any future flags osb_flags must be protected by spinlock 579 * too! */ 580 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 581 unsigned long flag) 582 { 583 spin_lock(&osb->osb_lock); 584 osb->osb_flags |= flag; 585 spin_unlock(&osb->osb_lock); 586 } 587 588 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 589 int hard) 590 { 591 spin_lock(&osb->osb_lock); 592 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 593 if (hard) 594 osb->osb_flags |= OCFS2_OSB_HARD_RO; 595 else 596 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 597 spin_unlock(&osb->osb_lock); 598 } 599 600 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 601 { 602 int ret; 603 604 spin_lock(&osb->osb_lock); 605 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 606 spin_unlock(&osb->osb_lock); 607 608 return ret; 609 } 610 611 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 612 { 613 int ret; 614 615 spin_lock(&osb->osb_lock); 616 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 617 spin_unlock(&osb->osb_lock); 618 619 return ret; 620 } 621 622 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 623 { 624 return (osb->s_feature_incompat & 625 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 626 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 627 } 628 629 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 630 { 631 if (ocfs2_clusterinfo_valid(osb) && 632 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 633 OCFS2_STACK_LABEL_LEN)) 634 return 1; 635 return 0; 636 } 637 638 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 639 { 640 if (ocfs2_clusterinfo_valid(osb) && 641 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 642 OCFS2_STACK_LABEL_LEN)) 643 return 1; 644 return 0; 645 } 646 647 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 648 { 649 return ocfs2_o2cb_stack(osb) && 650 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 651 } 652 653 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 654 { 655 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 656 } 657 658 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 659 { 660 return (osb->s_feature_incompat & 661 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 662 } 663 664 665 #define OCFS2_IS_VALID_DINODE(ptr) \ 666 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 667 668 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 669 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 670 671 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 672 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 673 674 675 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 676 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 677 678 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 679 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 680 681 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 682 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 683 684 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 685 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 686 687 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 688 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 689 690 static inline unsigned long ino_from_blkno(struct super_block *sb, 691 u64 blkno) 692 { 693 return (unsigned long)(blkno & (u64)ULONG_MAX); 694 } 695 696 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 697 u32 clusters) 698 { 699 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 700 sb->s_blocksize_bits; 701 702 return (u64)clusters << c_to_b_bits; 703 } 704 705 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 706 u64 blocks) 707 { 708 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 709 sb->s_blocksize_bits; 710 711 return (u32)(blocks >> b_to_c_bits); 712 } 713 714 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 715 u64 bytes) 716 { 717 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 718 unsigned int clusters; 719 720 bytes += OCFS2_SB(sb)->s_clustersize - 1; 721 /* OCFS2 just cannot have enough clusters to overflow this */ 722 clusters = (unsigned int)(bytes >> cl_bits); 723 724 return clusters; 725 } 726 727 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 728 u64 bytes) 729 { 730 bytes += sb->s_blocksize - 1; 731 return bytes >> sb->s_blocksize_bits; 732 } 733 734 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 735 u32 clusters) 736 { 737 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 738 } 739 740 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 741 u64 blocks) 742 { 743 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 744 unsigned int clusters; 745 746 clusters = ocfs2_blocks_to_clusters(sb, blocks); 747 return (u64)clusters << bits; 748 } 749 750 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 751 u64 bytes) 752 { 753 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 754 unsigned int clusters; 755 756 clusters = ocfs2_clusters_for_bytes(sb, bytes); 757 return (u64)clusters << cl_bits; 758 } 759 760 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 761 u64 bytes) 762 { 763 u64 blocks; 764 765 blocks = ocfs2_blocks_for_bytes(sb, bytes); 766 return blocks << sb->s_blocksize_bits; 767 } 768 769 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 770 { 771 return (unsigned long)((bytes + 511) >> 9); 772 } 773 774 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 775 unsigned long pg_index) 776 { 777 u32 clusters = pg_index; 778 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 779 780 if (unlikely(PAGE_CACHE_SHIFT > cbits)) 781 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); 782 else if (PAGE_CACHE_SHIFT < cbits) 783 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); 784 785 return clusters; 786 } 787 788 /* 789 * Find the 1st page index which covers the given clusters. 790 */ 791 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 792 u32 clusters) 793 { 794 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 795 pgoff_t index = clusters; 796 797 if (PAGE_CACHE_SHIFT > cbits) { 798 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); 799 } else if (PAGE_CACHE_SHIFT < cbits) { 800 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); 801 } 802 803 return index; 804 } 805 806 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 807 { 808 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 809 unsigned int pages_per_cluster = 1; 810 811 if (PAGE_CACHE_SHIFT < cbits) 812 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); 813 814 return pages_per_cluster; 815 } 816 817 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 818 unsigned int megs) 819 { 820 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 821 822 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 823 } 824 825 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 826 unsigned int clusters) 827 { 828 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 829 } 830 831 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 832 { 833 __set_bit_le(bit, bitmap); 834 } 835 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 836 837 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 838 { 839 __clear_bit_le(bit, bitmap); 840 } 841 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 842 843 #define ocfs2_test_bit test_bit_le 844 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 845 #define ocfs2_find_next_bit find_next_bit_le 846 847 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 848 { 849 #if BITS_PER_LONG == 64 850 *bit += ((unsigned long) addr & 7UL) << 3; 851 addr = (void *) ((unsigned long) addr & ~7UL); 852 #elif BITS_PER_LONG == 32 853 *bit += ((unsigned long) addr & 3UL) << 3; 854 addr = (void *) ((unsigned long) addr & ~3UL); 855 #else 856 #error "how many bits you are?!" 857 #endif 858 return addr; 859 } 860 861 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 862 { 863 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 864 ocfs2_set_bit(bit, bitmap); 865 } 866 867 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 868 { 869 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 870 ocfs2_clear_bit(bit, bitmap); 871 } 872 873 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 874 { 875 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 876 return ocfs2_test_bit(bit, bitmap); 877 } 878 879 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 880 int start) 881 { 882 int fix = 0, ret, tmpmax; 883 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 884 tmpmax = max + fix; 885 start += fix; 886 887 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 888 if (ret > max) 889 return max; 890 return ret; 891 } 892 893 #endif /* OCFS2_H */ 894 895