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 struct ocfs2_lock_res_ops; 148 149 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 150 151 #ifdef CONFIG_OCFS2_FS_STATS 152 struct ocfs2_lock_stats { 153 u64 ls_total; /* Total wait in NSEC */ 154 u32 ls_gets; /* Num acquires */ 155 u32 ls_fail; /* Num failed acquires */ 156 157 /* Storing max wait in usecs saves 24 bytes per inode */ 158 u32 ls_max; /* Max wait in USEC */ 159 }; 160 #endif 161 162 struct ocfs2_lock_res { 163 void *l_priv; 164 struct ocfs2_lock_res_ops *l_ops; 165 166 167 struct list_head l_blocked_list; 168 struct list_head l_mask_waiters; 169 170 unsigned long l_flags; 171 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 172 unsigned int l_ro_holders; 173 unsigned int l_ex_holders; 174 signed char l_level; 175 signed char l_requested; 176 signed char l_blocking; 177 178 /* Data packed - type enum ocfs2_lock_type */ 179 unsigned char l_type; 180 181 /* used from AST/BAST funcs. */ 182 /* Data packed - enum type ocfs2_ast_action */ 183 unsigned char l_action; 184 /* Data packed - enum type ocfs2_unlock_action */ 185 unsigned char l_unlock_action; 186 unsigned int l_pending_gen; 187 188 spinlock_t l_lock; 189 190 struct ocfs2_dlm_lksb l_lksb; 191 192 wait_queue_head_t l_event; 193 194 struct list_head l_debug_list; 195 196 #ifdef CONFIG_OCFS2_FS_STATS 197 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 198 u32 l_lock_refresh; /* Disk refreshes */ 199 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 200 #endif 201 #ifdef CONFIG_DEBUG_LOCK_ALLOC 202 struct lockdep_map l_lockdep_map; 203 #endif 204 }; 205 206 enum ocfs2_orphan_scan_state { 207 ORPHAN_SCAN_ACTIVE, 208 ORPHAN_SCAN_INACTIVE 209 }; 210 211 struct ocfs2_orphan_scan { 212 struct mutex os_lock; 213 struct ocfs2_super *os_osb; 214 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ 215 struct delayed_work os_orphan_scan_work; 216 struct timespec os_scantime; /* time this node ran the scan */ 217 u32 os_count; /* tracks node specific scans */ 218 u32 os_seqno; /* tracks cluster wide scans */ 219 atomic_t os_state; /* ACTIVE or INACTIVE */ 220 }; 221 222 struct ocfs2_dlm_debug { 223 struct kref d_refcnt; 224 struct dentry *d_locking_state; 225 struct list_head d_lockres_tracking; 226 }; 227 228 enum ocfs2_vol_state 229 { 230 VOLUME_INIT = 0, 231 VOLUME_MOUNTED, 232 VOLUME_MOUNTED_QUOTAS, 233 VOLUME_DISMOUNTED, 234 VOLUME_DISABLED 235 }; 236 237 struct ocfs2_alloc_stats 238 { 239 atomic_t moves; 240 atomic_t local_data; 241 atomic_t bitmap_data; 242 atomic_t bg_allocs; 243 atomic_t bg_extends; 244 }; 245 246 enum ocfs2_local_alloc_state 247 { 248 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 249 * this mountpoint. */ 250 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 251 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 252 * of bits has been reduced. */ 253 OCFS2_LA_DISABLED /* Local alloc has temporarily been 254 * disabled. */ 255 }; 256 257 enum ocfs2_mount_options 258 { 259 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 260 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 261 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 262 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 263 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 264 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 265 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 266 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 267 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 268 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 269 control lists */ 270 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 271 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 272 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 273 writes */ 274 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 275 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 276 }; 277 278 #define OCFS2_OSB_SOFT_RO 0x0001 279 #define OCFS2_OSB_HARD_RO 0x0002 280 #define OCFS2_OSB_ERROR_FS 0x0004 281 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 282 283 struct ocfs2_journal; 284 struct ocfs2_slot_info; 285 struct ocfs2_recovery_map; 286 struct ocfs2_replay_map; 287 struct ocfs2_quota_recovery; 288 struct ocfs2_super 289 { 290 struct task_struct *commit_task; 291 struct super_block *sb; 292 struct inode *root_inode; 293 struct inode *sys_root_inode; 294 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 295 struct inode **local_system_inodes; 296 297 struct ocfs2_slot_info *slot_info; 298 299 u32 *slot_recovery_generations; 300 301 spinlock_t node_map_lock; 302 303 u64 root_blkno; 304 u64 system_dir_blkno; 305 u64 bitmap_blkno; 306 u32 bitmap_cpg; 307 u8 *uuid; 308 char *uuid_str; 309 u32 uuid_hash; 310 u8 *vol_label; 311 u64 first_cluster_group_blkno; 312 u32 fs_generation; 313 314 u32 s_feature_compat; 315 u32 s_feature_incompat; 316 u32 s_feature_ro_compat; 317 318 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 319 * Could protect more on osb as it's very short lived. 320 */ 321 spinlock_t osb_lock; 322 u32 s_next_generation; 323 unsigned long osb_flags; 324 s16 s_inode_steal_slot; 325 s16 s_meta_steal_slot; 326 atomic_t s_num_inodes_stolen; 327 atomic_t s_num_meta_stolen; 328 329 unsigned long s_mount_opt; 330 unsigned int s_atime_quantum; 331 332 unsigned int max_slots; 333 unsigned int node_num; 334 int slot_num; 335 int preferred_slot; 336 int s_sectsize_bits; 337 int s_clustersize; 338 int s_clustersize_bits; 339 unsigned int s_xattr_inline_size; 340 341 atomic_t vol_state; 342 struct mutex recovery_lock; 343 struct ocfs2_recovery_map *recovery_map; 344 struct ocfs2_replay_map *replay_map; 345 struct task_struct *recovery_thread_task; 346 int disable_recovery; 347 wait_queue_head_t checkpoint_event; 348 struct ocfs2_journal *journal; 349 unsigned long osb_commit_interval; 350 351 struct delayed_work la_enable_wq; 352 353 /* 354 * Must hold local alloc i_mutex and osb->osb_lock to change 355 * local_alloc_bits. Reads can be done under either lock. 356 */ 357 unsigned int local_alloc_bits; 358 unsigned int local_alloc_default_bits; 359 /* osb_clusters_at_boot can become stale! Do not trust it to 360 * be up to date. */ 361 unsigned int osb_clusters_at_boot; 362 363 enum ocfs2_local_alloc_state local_alloc_state; /* protected 364 * by osb_lock */ 365 366 struct buffer_head *local_alloc_bh; 367 368 u64 la_last_gd; 369 370 struct ocfs2_reservation_map osb_la_resmap; 371 372 unsigned int osb_resv_level; 373 unsigned int osb_dir_resv_level; 374 375 /* Next three fields are for local node slot recovery during 376 * mount. */ 377 int dirty; 378 struct ocfs2_dinode *local_alloc_copy; 379 struct ocfs2_quota_recovery *quota_rec; 380 381 struct ocfs2_blockcheck_stats osb_ecc_stats; 382 struct ocfs2_alloc_stats alloc_stats; 383 char dev_str[20]; /* "major,minor" of the device */ 384 385 u8 osb_stackflags; 386 387 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 388 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 389 struct ocfs2_cluster_connection *cconn; 390 struct ocfs2_lock_res osb_super_lockres; 391 struct ocfs2_lock_res osb_rename_lockres; 392 struct ocfs2_lock_res osb_nfs_sync_lockres; 393 struct ocfs2_dlm_debug *osb_dlm_debug; 394 395 struct dentry *osb_debug_root; 396 struct dentry *osb_ctxt; 397 398 wait_queue_head_t recovery_event; 399 400 spinlock_t dc_task_lock; 401 struct task_struct *dc_task; 402 wait_queue_head_t dc_event; 403 unsigned long dc_wake_sequence; 404 unsigned long dc_work_sequence; 405 406 /* 407 * Any thread can add locks to the list, but the downconvert 408 * thread is the only one allowed to remove locks. Any change 409 * to this rule requires updating 410 * ocfs2_downconvert_thread_do_work(). 411 */ 412 struct list_head blocked_lock_list; 413 unsigned long blocked_lock_count; 414 415 /* List of dquot structures to drop last reference to */ 416 struct llist_head dquot_drop_list; 417 struct work_struct dquot_drop_work; 418 419 wait_queue_head_t osb_mount_event; 420 421 /* Truncate log info */ 422 struct inode *osb_tl_inode; 423 struct buffer_head *osb_tl_bh; 424 struct delayed_work osb_truncate_log_wq; 425 atomic_t osb_tl_disable; 426 /* 427 * How many clusters in our truncate log. 428 * It must be protected by osb_tl_inode->i_mutex. 429 */ 430 unsigned int truncated_clusters; 431 432 struct ocfs2_node_map osb_recovering_orphan_dirs; 433 unsigned int *osb_orphan_wipes; 434 wait_queue_head_t osb_wipe_event; 435 436 struct ocfs2_orphan_scan osb_orphan_scan; 437 438 /* used to protect metaecc calculation check of xattr. */ 439 spinlock_t osb_xattr_lock; 440 441 unsigned int osb_dx_mask; 442 u32 osb_dx_seed[4]; 443 444 /* the group we used to allocate inodes. */ 445 u64 osb_inode_alloc_group; 446 447 /* rb tree root for refcount lock. */ 448 struct rb_root osb_rf_lock_tree; 449 struct ocfs2_refcount_tree *osb_ref_tree_lru; 450 451 struct mutex system_file_mutex; 452 }; 453 454 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 455 456 /* Useful typedef for passing around journal access functions */ 457 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 458 struct ocfs2_caching_info *ci, 459 struct buffer_head *bh, int type); 460 461 static inline int ocfs2_should_order_data(struct inode *inode) 462 { 463 if (!S_ISREG(inode->i_mode)) 464 return 0; 465 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 466 return 0; 467 return 1; 468 } 469 470 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 471 { 472 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 473 return 1; 474 return 0; 475 } 476 477 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 478 { 479 /* 480 * Support for sparse files is a pre-requisite 481 */ 482 if (!ocfs2_sparse_alloc(osb)) 483 return 0; 484 485 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 486 return 1; 487 return 0; 488 } 489 490 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 491 { 492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 493 return 1; 494 return 0; 495 } 496 497 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 498 { 499 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 500 return 1; 501 return 0; 502 } 503 504 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 505 { 506 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 507 return 1; 508 return 0; 509 } 510 511 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 512 { 513 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 514 return 1; 515 return 0; 516 } 517 518 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 519 { 520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 521 return 1; 522 return 0; 523 } 524 525 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 526 { 527 if (ocfs2_supports_indexed_dirs(osb)) 528 return OCFS2_DX_LINK_MAX; 529 return OCFS2_LINK_MAX; 530 } 531 532 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 533 { 534 u32 nlink = le16_to_cpu(di->i_links_count); 535 u32 hi = le16_to_cpu(di->i_links_count_hi); 536 537 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 538 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 539 540 return nlink; 541 } 542 543 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 544 { 545 u16 lo, hi; 546 547 lo = nlink; 548 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 549 550 di->i_links_count = cpu_to_le16(lo); 551 di->i_links_count_hi = cpu_to_le16(hi); 552 } 553 554 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 555 { 556 u32 links = ocfs2_read_links_count(di); 557 558 links += n; 559 560 ocfs2_set_links_count(di, links); 561 } 562 563 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 564 { 565 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 566 return 1; 567 return 0; 568 } 569 570 /* set / clear functions because cluster events can make these happen 571 * in parallel so we want the transitions to be atomic. this also 572 * means that any future flags osb_flags must be protected by spinlock 573 * too! */ 574 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 575 unsigned long flag) 576 { 577 spin_lock(&osb->osb_lock); 578 osb->osb_flags |= flag; 579 spin_unlock(&osb->osb_lock); 580 } 581 582 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 583 int hard) 584 { 585 spin_lock(&osb->osb_lock); 586 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 587 if (hard) 588 osb->osb_flags |= OCFS2_OSB_HARD_RO; 589 else 590 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 591 spin_unlock(&osb->osb_lock); 592 } 593 594 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 595 { 596 int ret; 597 598 spin_lock(&osb->osb_lock); 599 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 600 spin_unlock(&osb->osb_lock); 601 602 return ret; 603 } 604 605 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 606 { 607 int ret; 608 609 spin_lock(&osb->osb_lock); 610 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 611 spin_unlock(&osb->osb_lock); 612 613 return ret; 614 } 615 616 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 617 { 618 return (osb->s_feature_incompat & 619 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 620 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 621 } 622 623 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 624 { 625 if (ocfs2_clusterinfo_valid(osb) && 626 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 627 OCFS2_STACK_LABEL_LEN)) 628 return 1; 629 return 0; 630 } 631 632 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 633 { 634 if (ocfs2_clusterinfo_valid(osb) && 635 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 636 OCFS2_STACK_LABEL_LEN)) 637 return 1; 638 return 0; 639 } 640 641 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 642 { 643 return ocfs2_o2cb_stack(osb) && 644 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 645 } 646 647 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 648 { 649 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 650 } 651 652 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 653 { 654 return (osb->s_feature_incompat & 655 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 656 } 657 658 659 #define OCFS2_IS_VALID_DINODE(ptr) \ 660 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 661 662 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 663 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 664 665 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 666 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 667 668 669 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 670 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 671 672 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 673 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 674 675 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 676 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 677 678 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 679 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 680 681 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 682 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 683 684 static inline unsigned long ino_from_blkno(struct super_block *sb, 685 u64 blkno) 686 { 687 return (unsigned long)(blkno & (u64)ULONG_MAX); 688 } 689 690 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 691 u32 clusters) 692 { 693 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 694 sb->s_blocksize_bits; 695 696 return (u64)clusters << c_to_b_bits; 697 } 698 699 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 700 u64 blocks) 701 { 702 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 703 sb->s_blocksize_bits; 704 705 return (u32)(blocks >> b_to_c_bits); 706 } 707 708 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 709 u64 bytes) 710 { 711 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 712 unsigned int clusters; 713 714 bytes += OCFS2_SB(sb)->s_clustersize - 1; 715 /* OCFS2 just cannot have enough clusters to overflow this */ 716 clusters = (unsigned int)(bytes >> cl_bits); 717 718 return clusters; 719 } 720 721 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 722 u64 bytes) 723 { 724 bytes += sb->s_blocksize - 1; 725 return bytes >> sb->s_blocksize_bits; 726 } 727 728 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 729 u32 clusters) 730 { 731 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 732 } 733 734 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 735 u64 blocks) 736 { 737 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 738 unsigned int clusters; 739 740 clusters = ocfs2_blocks_to_clusters(sb, blocks); 741 return (u64)clusters << bits; 742 } 743 744 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 745 u64 bytes) 746 { 747 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 748 unsigned int clusters; 749 750 clusters = ocfs2_clusters_for_bytes(sb, bytes); 751 return (u64)clusters << cl_bits; 752 } 753 754 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 755 u64 bytes) 756 { 757 u64 blocks; 758 759 blocks = ocfs2_blocks_for_bytes(sb, bytes); 760 return blocks << sb->s_blocksize_bits; 761 } 762 763 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 764 { 765 return (unsigned long)((bytes + 511) >> 9); 766 } 767 768 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 769 unsigned long pg_index) 770 { 771 u32 clusters = pg_index; 772 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 773 774 if (unlikely(PAGE_CACHE_SHIFT > cbits)) 775 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); 776 else if (PAGE_CACHE_SHIFT < cbits) 777 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); 778 779 return clusters; 780 } 781 782 /* 783 * Find the 1st page index which covers the given clusters. 784 */ 785 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 786 u32 clusters) 787 { 788 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 789 pgoff_t index = clusters; 790 791 if (PAGE_CACHE_SHIFT > cbits) { 792 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); 793 } else if (PAGE_CACHE_SHIFT < cbits) { 794 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); 795 } 796 797 return index; 798 } 799 800 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 801 { 802 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 803 unsigned int pages_per_cluster = 1; 804 805 if (PAGE_CACHE_SHIFT < cbits) 806 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); 807 808 return pages_per_cluster; 809 } 810 811 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 812 unsigned int megs) 813 { 814 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 815 816 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 817 } 818 819 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 820 unsigned int clusters) 821 { 822 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 823 } 824 825 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 826 { 827 __set_bit_le(bit, bitmap); 828 } 829 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 830 831 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 832 { 833 __clear_bit_le(bit, bitmap); 834 } 835 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 836 837 #define ocfs2_test_bit test_bit_le 838 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 839 #define ocfs2_find_next_bit find_next_bit_le 840 841 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 842 { 843 #if BITS_PER_LONG == 64 844 *bit += ((unsigned long) addr & 7UL) << 3; 845 addr = (void *) ((unsigned long) addr & ~7UL); 846 #elif BITS_PER_LONG == 32 847 *bit += ((unsigned long) addr & 3UL) << 3; 848 addr = (void *) ((unsigned long) addr & ~3UL); 849 #else 850 #error "how many bits you are?!" 851 #endif 852 return addr; 853 } 854 855 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 856 { 857 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 858 ocfs2_set_bit(bit, bitmap); 859 } 860 861 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 862 { 863 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 864 ocfs2_clear_bit(bit, bitmap); 865 } 866 867 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 868 { 869 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 870 return ocfs2_test_bit(bit, bitmap); 871 } 872 873 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 874 int start) 875 { 876 int fix = 0, ret, tmpmax; 877 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 878 tmpmax = max + fix; 879 start += fix; 880 881 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 882 if (ret > max) 883 return max; 884 return ret; 885 } 886 887 #endif /* OCFS2_H */ 888 889