1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * ocfs2.h 4 * 5 * Defines macros and structures used in OCFS2 6 * 7 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 8 */ 9 10 #ifndef OCFS2_H 11 #define OCFS2_H 12 13 #include <linux/spinlock.h> 14 #include <linux/sched.h> 15 #include <linux/wait.h> 16 #include <linux/list.h> 17 #include <linux/llist.h> 18 #include <linux/rbtree.h> 19 #include <linux/workqueue.h> 20 #include <linux/kref.h> 21 #include <linux/mutex.h> 22 #include <linux/lockdep.h> 23 #include <linux/jbd2.h> 24 25 /* For union ocfs2_dlm_lksb */ 26 #include "stackglue.h" 27 28 #include "ocfs2_fs.h" 29 #include "ocfs2_lockid.h" 30 #include "ocfs2_ioctl.h" 31 32 /* For struct ocfs2_blockcheck_stats */ 33 #include "blockcheck.h" 34 35 #include "reservations.h" 36 37 #include "filecheck.h" 38 39 /* Caching of metadata buffers */ 40 41 /* Most user visible OCFS2 inodes will have very few pieces of 42 * metadata, but larger files (including bitmaps, etc) must be taken 43 * into account when designing an access scheme. We allow a small 44 * amount of inlined blocks to be stored on an array and grow the 45 * structure into a rb tree when necessary. */ 46 #define OCFS2_CACHE_INFO_MAX_ARRAY 2 47 48 /* Flags for ocfs2_caching_info */ 49 50 enum ocfs2_caching_info_flags { 51 /* Indicates that the metadata cache is using the inline array */ 52 OCFS2_CACHE_FL_INLINE = 1<<1, 53 }; 54 55 struct ocfs2_caching_operations; 56 struct ocfs2_caching_info { 57 /* 58 * The parent structure provides the locks, but because the 59 * parent structure can differ, it provides locking operations 60 * to struct ocfs2_caching_info. 61 */ 62 const struct ocfs2_caching_operations *ci_ops; 63 64 /* next two are protected by trans_inc_lock */ 65 /* which transaction were we created on? Zero if none. */ 66 unsigned long ci_created_trans; 67 /* last transaction we were a part of. */ 68 unsigned long ci_last_trans; 69 70 /* Cache structures */ 71 unsigned int ci_flags; 72 unsigned int ci_num_cached; 73 union { 74 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; 75 struct rb_root ci_tree; 76 } ci_cache; 77 }; 78 /* 79 * Need this prototype here instead of in uptodate.h because journal.h 80 * uses it. 81 */ 82 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); 83 84 /* this limits us to 256 nodes 85 * if we need more, we can do a kmalloc for the map */ 86 #define OCFS2_NODE_MAP_MAX_NODES 256 87 struct ocfs2_node_map { 88 u16 num_nodes; 89 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 90 }; 91 92 enum ocfs2_ast_action { 93 OCFS2_AST_INVALID = 0, 94 OCFS2_AST_ATTACH, 95 OCFS2_AST_CONVERT, 96 OCFS2_AST_DOWNCONVERT, 97 }; 98 99 /* actions for an unlockast function to take. */ 100 enum ocfs2_unlock_action { 101 OCFS2_UNLOCK_INVALID = 0, 102 OCFS2_UNLOCK_CANCEL_CONVERT, 103 OCFS2_UNLOCK_DROP_LOCK, 104 }; 105 106 /* ocfs2_lock_res->l_flags flags. */ 107 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized 108 * the lvb */ 109 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in 110 * dlm_lock */ 111 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to 112 * downconvert*/ 113 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ 114 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) 115 #define OCFS2_LOCK_REFRESHING (0x00000020) 116 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization 117 * for shutdown paths */ 118 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track 119 * when to skip queueing 120 * a lock because it's 121 * about to be 122 * dropped. */ 123 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ 124 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ 125 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a 126 call to dlm_lock. Only 127 exists with BUSY set. */ 128 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread 129 * from downconverting 130 * before the upconvert 131 * has completed */ 132 133 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster 134 * lock has already 135 * returned, do not block 136 * dc thread from 137 * downconverting */ 138 139 struct ocfs2_lock_res_ops; 140 141 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 142 143 #ifdef CONFIG_OCFS2_FS_STATS 144 struct ocfs2_lock_stats { 145 u64 ls_total; /* Total wait in NSEC */ 146 u32 ls_gets; /* Num acquires */ 147 u32 ls_fail; /* Num failed acquires */ 148 149 /* Storing max wait in usecs saves 24 bytes per inode */ 150 u32 ls_max; /* Max wait in USEC */ 151 u64 ls_last; /* Last unlock time in USEC */ 152 }; 153 #endif 154 155 struct ocfs2_lock_res { 156 void *l_priv; 157 struct ocfs2_lock_res_ops *l_ops; 158 159 160 struct list_head l_blocked_list; 161 struct list_head l_mask_waiters; 162 struct list_head l_holders; 163 164 unsigned long l_flags; 165 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 166 unsigned int l_ro_holders; 167 unsigned int l_ex_holders; 168 signed char l_level; 169 signed char l_requested; 170 signed char l_blocking; 171 172 /* Data packed - type enum ocfs2_lock_type */ 173 unsigned char l_type; 174 175 /* used from AST/BAST funcs. */ 176 /* Data packed - enum type ocfs2_ast_action */ 177 unsigned char l_action; 178 /* Data packed - enum type ocfs2_unlock_action */ 179 unsigned char l_unlock_action; 180 unsigned int l_pending_gen; 181 182 spinlock_t l_lock; 183 184 struct ocfs2_dlm_lksb l_lksb; 185 186 wait_queue_head_t l_event; 187 188 struct list_head l_debug_list; 189 190 #ifdef CONFIG_OCFS2_FS_STATS 191 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 192 u32 l_lock_refresh; /* Disk refreshes */ 193 u64 l_lock_wait; /* First lock wait time */ 194 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 195 #endif 196 #ifdef CONFIG_DEBUG_LOCK_ALLOC 197 struct lockdep_map l_lockdep_map; 198 #endif 199 }; 200 201 enum ocfs2_orphan_reco_type { 202 ORPHAN_NO_NEED_TRUNCATE = 0, 203 ORPHAN_NEED_TRUNCATE, 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 time64_t 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 u32 d_filter_secs; 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 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ 278 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ 279 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ 280 }; 281 282 #define OCFS2_OSB_SOFT_RO 0x0001 283 #define OCFS2_OSB_HARD_RO 0x0002 284 #define OCFS2_OSB_ERROR_FS 0x0004 285 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 286 287 struct ocfs2_journal; 288 struct ocfs2_slot_info; 289 struct ocfs2_recovery_map; 290 struct ocfs2_replay_map; 291 struct ocfs2_quota_recovery; 292 struct ocfs2_super 293 { 294 struct task_struct *commit_task; 295 struct super_block *sb; 296 struct inode *root_inode; 297 struct inode *sys_root_inode; 298 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 299 struct inode **local_system_inodes; 300 301 struct ocfs2_slot_info *slot_info; 302 303 u32 *slot_recovery_generations; 304 305 spinlock_t node_map_lock; 306 307 u64 root_blkno; 308 u64 system_dir_blkno; 309 u64 bitmap_blkno; 310 u32 bitmap_cpg; 311 char *uuid_str; 312 u32 uuid_hash; 313 u8 *vol_label; 314 u64 first_cluster_group_blkno; 315 u32 fs_generation; 316 317 u32 s_feature_compat; 318 u32 s_feature_incompat; 319 u32 s_feature_ro_compat; 320 321 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 322 * Could protect more on osb as it's very short lived. 323 */ 324 spinlock_t osb_lock; 325 u32 s_next_generation; 326 unsigned long osb_flags; 327 u16 s_inode_steal_slot; 328 u16 s_meta_steal_slot; 329 atomic_t s_num_inodes_stolen; 330 atomic_t s_num_meta_stolen; 331 332 unsigned long s_mount_opt; 333 unsigned int s_atime_quantum; 334 335 unsigned int max_slots; 336 unsigned int node_num; 337 int slot_num; 338 int preferred_slot; 339 int s_sectsize_bits; 340 int s_clustersize; 341 int s_clustersize_bits; 342 unsigned int s_xattr_inline_size; 343 344 atomic_t vol_state; 345 struct mutex recovery_lock; 346 struct ocfs2_recovery_map *recovery_map; 347 struct ocfs2_replay_map *replay_map; 348 struct task_struct *recovery_thread_task; 349 int disable_recovery; 350 wait_queue_head_t checkpoint_event; 351 struct ocfs2_journal *journal; 352 unsigned long osb_commit_interval; 353 354 struct delayed_work la_enable_wq; 355 356 /* 357 * Must hold local alloc i_rwsem and osb->osb_lock to change 358 * local_alloc_bits. Reads can be done under either lock. 359 */ 360 unsigned int local_alloc_bits; 361 unsigned int local_alloc_default_bits; 362 /* osb_clusters_at_boot can become stale! Do not trust it to 363 * be up to date. */ 364 unsigned int osb_clusters_at_boot; 365 366 enum ocfs2_local_alloc_state local_alloc_state; /* protected 367 * by osb_lock */ 368 369 struct buffer_head *local_alloc_bh; 370 371 u64 la_last_gd; 372 373 struct ocfs2_reservation_map osb_la_resmap; 374 375 unsigned int osb_resv_level; 376 unsigned int osb_dir_resv_level; 377 378 /* Next two fields are for local node slot recovery during 379 * mount. */ 380 struct ocfs2_dinode *local_alloc_copy; 381 struct ocfs2_quota_recovery *quota_rec; 382 383 struct ocfs2_blockcheck_stats osb_ecc_stats; 384 struct ocfs2_alloc_stats alloc_stats; 385 char dev_str[20]; /* "major,minor" of the device */ 386 387 u8 osb_stackflags; 388 389 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 390 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 391 struct ocfs2_cluster_connection *cconn; 392 struct ocfs2_lock_res osb_super_lockres; 393 struct ocfs2_lock_res osb_rename_lockres; 394 struct ocfs2_lock_res osb_nfs_sync_lockres; 395 struct rw_semaphore nfs_sync_rwlock; 396 struct ocfs2_lock_res osb_trim_fs_lockres; 397 struct mutex obs_trim_fs_mutex; 398 struct ocfs2_dlm_debug *osb_dlm_debug; 399 400 struct dentry *osb_debug_root; 401 402 wait_queue_head_t recovery_event; 403 404 spinlock_t dc_task_lock; 405 struct task_struct *dc_task; 406 wait_queue_head_t dc_event; 407 unsigned long dc_wake_sequence; 408 unsigned long dc_work_sequence; 409 410 /* 411 * Any thread can add locks to the list, but the downconvert 412 * thread is the only one allowed to remove locks. Any change 413 * to this rule requires updating 414 * ocfs2_downconvert_thread_do_work(). 415 */ 416 struct list_head blocked_lock_list; 417 unsigned long blocked_lock_count; 418 419 /* List of dquot structures to drop last reference to */ 420 struct llist_head dquot_drop_list; 421 struct work_struct dquot_drop_work; 422 423 wait_queue_head_t osb_mount_event; 424 425 /* Truncate log info */ 426 struct inode *osb_tl_inode; 427 struct buffer_head *osb_tl_bh; 428 struct delayed_work osb_truncate_log_wq; 429 atomic_t osb_tl_disable; 430 /* 431 * How many clusters in our truncate log. 432 * It must be protected by osb_tl_inode->i_rwsem. 433 */ 434 unsigned int truncated_clusters; 435 436 struct ocfs2_node_map osb_recovering_orphan_dirs; 437 unsigned int *osb_orphan_wipes; 438 wait_queue_head_t osb_wipe_event; 439 440 struct ocfs2_orphan_scan osb_orphan_scan; 441 442 /* used to protect metaecc calculation check of xattr. */ 443 spinlock_t osb_xattr_lock; 444 445 unsigned int osb_dx_mask; 446 u32 osb_dx_seed[4]; 447 448 /* the group we used to allocate inodes. */ 449 u64 osb_inode_alloc_group; 450 451 /* rb tree root for refcount lock. */ 452 struct rb_root osb_rf_lock_tree; 453 struct ocfs2_refcount_tree *osb_ref_tree_lru; 454 455 struct mutex system_file_mutex; 456 457 /* 458 * OCFS2 needs to schedule several different types of work which 459 * require cluster locking, disk I/O, recovery waits, etc. Since these 460 * types of work tend to be heavy we avoid using the kernel events 461 * workqueue and schedule on our own. 462 */ 463 struct workqueue_struct *ocfs2_wq; 464 465 /* sysfs directory per partition */ 466 struct kset *osb_dev_kset; 467 468 /* file check related stuff */ 469 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 470 }; 471 472 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 473 474 /* Useful typedef for passing around journal access functions */ 475 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 476 struct ocfs2_caching_info *ci, 477 struct buffer_head *bh, int type); 478 479 static inline int ocfs2_should_order_data(struct inode *inode) 480 { 481 if (!S_ISREG(inode->i_mode)) 482 return 0; 483 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 484 return 0; 485 return 1; 486 } 487 488 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 489 { 490 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 491 return 1; 492 return 0; 493 } 494 495 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 496 { 497 /* 498 * Support for sparse files is a pre-requisite 499 */ 500 if (!ocfs2_sparse_alloc(osb)) 501 return 0; 502 503 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 504 return 1; 505 return 0; 506 } 507 508 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 509 { 510 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 511 return 1; 512 return 0; 513 } 514 515 516 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 517 { 518 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 519 return 1; 520 return 0; 521 } 522 523 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 524 { 525 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 526 return 1; 527 return 0; 528 } 529 530 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 531 { 532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 533 return 1; 534 return 0; 535 } 536 537 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 538 { 539 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 540 return 1; 541 return 0; 542 } 543 544 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 545 { 546 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 547 return 1; 548 return 0; 549 } 550 551 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 552 { 553 if (ocfs2_supports_indexed_dirs(osb)) 554 return OCFS2_DX_LINK_MAX; 555 return OCFS2_LINK_MAX; 556 } 557 558 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 559 { 560 u32 nlink = le16_to_cpu(di->i_links_count); 561 u32 hi = le16_to_cpu(di->i_links_count_hi); 562 563 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 564 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 565 566 return nlink; 567 } 568 569 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 570 { 571 u16 lo, hi; 572 573 lo = nlink; 574 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 575 576 di->i_links_count = cpu_to_le16(lo); 577 di->i_links_count_hi = cpu_to_le16(hi); 578 } 579 580 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 581 { 582 u32 links = ocfs2_read_links_count(di); 583 584 links += n; 585 586 ocfs2_set_links_count(di, links); 587 } 588 589 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 590 { 591 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 592 return 1; 593 return 0; 594 } 595 596 /* set / clear functions because cluster events can make these happen 597 * in parallel so we want the transitions to be atomic. this also 598 * means that any future flags osb_flags must be protected by spinlock 599 * too! */ 600 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 601 unsigned long flag) 602 { 603 spin_lock(&osb->osb_lock); 604 osb->osb_flags |= flag; 605 spin_unlock(&osb->osb_lock); 606 } 607 608 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 609 int hard) 610 { 611 spin_lock(&osb->osb_lock); 612 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 613 if (hard) 614 osb->osb_flags |= OCFS2_OSB_HARD_RO; 615 else 616 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 617 spin_unlock(&osb->osb_lock); 618 } 619 620 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 621 { 622 int ret; 623 624 spin_lock(&osb->osb_lock); 625 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 626 spin_unlock(&osb->osb_lock); 627 628 return ret; 629 } 630 631 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 632 { 633 int ret; 634 635 spin_lock(&osb->osb_lock); 636 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 637 spin_unlock(&osb->osb_lock); 638 639 return ret; 640 } 641 642 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 643 { 644 return (osb->s_feature_incompat & 645 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 646 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 647 } 648 649 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 650 { 651 if (ocfs2_clusterinfo_valid(osb) && 652 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 653 OCFS2_STACK_LABEL_LEN)) 654 return 1; 655 return 0; 656 } 657 658 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 659 { 660 if (ocfs2_clusterinfo_valid(osb) && 661 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 662 OCFS2_STACK_LABEL_LEN)) 663 return 1; 664 return 0; 665 } 666 667 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 668 { 669 return ocfs2_o2cb_stack(osb) && 670 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 671 } 672 673 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 674 { 675 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 676 } 677 678 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 679 { 680 return (osb->s_feature_incompat & 681 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 682 } 683 684 685 #define OCFS2_IS_VALID_DINODE(ptr) \ 686 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 687 688 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 689 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 690 691 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 692 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 693 694 695 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 696 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 697 698 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 699 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 700 701 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 702 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 703 704 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 705 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 706 707 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 708 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 709 710 static inline unsigned long ino_from_blkno(struct super_block *sb, 711 u64 blkno) 712 { 713 return (unsigned long)(blkno & (u64)ULONG_MAX); 714 } 715 716 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 717 u32 clusters) 718 { 719 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 720 sb->s_blocksize_bits; 721 722 return (u64)clusters << c_to_b_bits; 723 } 724 725 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 726 u64 blocks) 727 { 728 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 729 sb->s_blocksize_bits; 730 731 blocks += (1 << b_to_c_bits) - 1; 732 return (u32)(blocks >> b_to_c_bits); 733 } 734 735 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 736 u64 blocks) 737 { 738 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 739 sb->s_blocksize_bits; 740 741 return (u32)(blocks >> b_to_c_bits); 742 } 743 744 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 745 u64 bytes) 746 { 747 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 748 unsigned int clusters; 749 750 bytes += OCFS2_SB(sb)->s_clustersize - 1; 751 /* OCFS2 just cannot have enough clusters to overflow this */ 752 clusters = (unsigned int)(bytes >> cl_bits); 753 754 return clusters; 755 } 756 757 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 758 u64 bytes) 759 { 760 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 761 unsigned int clusters; 762 763 clusters = (unsigned int)(bytes >> cl_bits); 764 return clusters; 765 } 766 767 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 768 u64 bytes) 769 { 770 bytes += sb->s_blocksize - 1; 771 return bytes >> sb->s_blocksize_bits; 772 } 773 774 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 775 u32 clusters) 776 { 777 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 778 } 779 780 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 781 u64 blocks) 782 { 783 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 784 unsigned int clusters; 785 786 clusters = ocfs2_blocks_to_clusters(sb, blocks); 787 return (u64)clusters << bits; 788 } 789 790 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 791 u64 bytes) 792 { 793 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 794 unsigned int clusters; 795 796 clusters = ocfs2_clusters_for_bytes(sb, bytes); 797 return (u64)clusters << cl_bits; 798 } 799 800 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 801 u64 bytes) 802 { 803 u64 blocks; 804 805 blocks = ocfs2_blocks_for_bytes(sb, bytes); 806 return blocks << sb->s_blocksize_bits; 807 } 808 809 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 810 { 811 return (unsigned long)((bytes + 511) >> 9); 812 } 813 814 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 815 unsigned long pg_index) 816 { 817 u32 clusters = pg_index; 818 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 819 820 if (unlikely(PAGE_SHIFT > cbits)) 821 clusters = pg_index << (PAGE_SHIFT - cbits); 822 else if (PAGE_SHIFT < cbits) 823 clusters = pg_index >> (cbits - PAGE_SHIFT); 824 825 return clusters; 826 } 827 828 /* 829 * Find the 1st page index which covers the given clusters. 830 */ 831 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 832 u32 clusters) 833 { 834 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 835 pgoff_t index = clusters; 836 837 if (PAGE_SHIFT > cbits) { 838 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 839 } else if (PAGE_SHIFT < cbits) { 840 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 841 } 842 843 return index; 844 } 845 846 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 847 { 848 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 849 unsigned int pages_per_cluster = 1; 850 851 if (PAGE_SHIFT < cbits) 852 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 853 854 return pages_per_cluster; 855 } 856 857 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 858 unsigned int megs) 859 { 860 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 861 862 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 863 } 864 865 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 866 unsigned int clusters) 867 { 868 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 869 } 870 871 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 872 { 873 __set_bit_le(bit, bitmap); 874 } 875 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 876 877 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 878 { 879 __clear_bit_le(bit, bitmap); 880 } 881 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 882 883 #define ocfs2_test_bit test_bit_le 884 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 885 #define ocfs2_find_next_bit find_next_bit_le 886 887 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 888 { 889 #if BITS_PER_LONG == 64 890 *bit += ((unsigned long) addr & 7UL) << 3; 891 addr = (void *) ((unsigned long) addr & ~7UL); 892 #elif BITS_PER_LONG == 32 893 *bit += ((unsigned long) addr & 3UL) << 3; 894 addr = (void *) ((unsigned long) addr & ~3UL); 895 #else 896 #error "how many bits you are?!" 897 #endif 898 return addr; 899 } 900 901 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 902 { 903 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 904 ocfs2_set_bit(bit, bitmap); 905 } 906 907 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 908 { 909 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 910 ocfs2_clear_bit(bit, bitmap); 911 } 912 913 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 914 { 915 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 916 return ocfs2_test_bit(bit, bitmap); 917 } 918 919 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 920 int start) 921 { 922 int fix = 0, ret, tmpmax; 923 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 924 tmpmax = max + fix; 925 start += fix; 926 927 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 928 if (ret > max) 929 return max; 930 return ret; 931 } 932 933 #endif /* OCFS2_H */ 934 935