1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * ocfs2.h 6 * 7 * Defines macros and structures used in OCFS2 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 */ 11 12 #ifndef OCFS2_H 13 #define OCFS2_H 14 15 #include <linux/spinlock.h> 16 #include <linux/sched.h> 17 #include <linux/wait.h> 18 #include <linux/list.h> 19 #include <linux/llist.h> 20 #include <linux/rbtree.h> 21 #include <linux/workqueue.h> 22 #include <linux/kref.h> 23 #include <linux/mutex.h> 24 #include <linux/lockdep.h> 25 #include <linux/jbd2.h> 26 27 /* For union ocfs2_dlm_lksb */ 28 #include "stackglue.h" 29 30 #include "ocfs2_fs.h" 31 #include "ocfs2_lockid.h" 32 #include "ocfs2_ioctl.h" 33 34 /* For struct ocfs2_blockcheck_stats */ 35 #include "blockcheck.h" 36 37 #include "reservations.h" 38 39 #include "filecheck.h" 40 41 /* Caching of metadata buffers */ 42 43 /* Most user visible OCFS2 inodes will have very few pieces of 44 * metadata, but larger files (including bitmaps, etc) must be taken 45 * into account when designing an access scheme. We allow a small 46 * amount of inlined blocks to be stored on an array and grow the 47 * structure into a rb tree when necessary. */ 48 #define OCFS2_CACHE_INFO_MAX_ARRAY 2 49 50 /* Flags for ocfs2_caching_info */ 51 52 enum ocfs2_caching_info_flags { 53 /* Indicates that the metadata cache is using the inline array */ 54 OCFS2_CACHE_FL_INLINE = 1<<1, 55 }; 56 57 struct ocfs2_caching_operations; 58 struct ocfs2_caching_info { 59 /* 60 * The parent structure provides the locks, but because the 61 * parent structure can differ, it provides locking operations 62 * to struct ocfs2_caching_info. 63 */ 64 const struct ocfs2_caching_operations *ci_ops; 65 66 /* next two are protected by trans_inc_lock */ 67 /* which transaction were we created on? Zero if none. */ 68 unsigned long ci_created_trans; 69 /* last transaction we were a part of. */ 70 unsigned long ci_last_trans; 71 72 /* Cache structures */ 73 unsigned int ci_flags; 74 unsigned int ci_num_cached; 75 union { 76 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; 77 struct rb_root ci_tree; 78 } ci_cache; 79 }; 80 /* 81 * Need this prototype here instead of in uptodate.h because journal.h 82 * uses it. 83 */ 84 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); 85 86 /* this limits us to 256 nodes 87 * if we need more, we can do a kmalloc for the map */ 88 #define OCFS2_NODE_MAP_MAX_NODES 256 89 struct ocfs2_node_map { 90 u16 num_nodes; 91 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 92 }; 93 94 enum ocfs2_ast_action { 95 OCFS2_AST_INVALID = 0, 96 OCFS2_AST_ATTACH, 97 OCFS2_AST_CONVERT, 98 OCFS2_AST_DOWNCONVERT, 99 }; 100 101 /* actions for an unlockast function to take. */ 102 enum ocfs2_unlock_action { 103 OCFS2_UNLOCK_INVALID = 0, 104 OCFS2_UNLOCK_CANCEL_CONVERT, 105 OCFS2_UNLOCK_DROP_LOCK, 106 }; 107 108 /* ocfs2_lock_res->l_flags flags. */ 109 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized 110 * the lvb */ 111 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in 112 * dlm_lock */ 113 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to 114 * downconvert*/ 115 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ 116 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) 117 #define OCFS2_LOCK_REFRESHING (0x00000020) 118 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization 119 * for shutdown paths */ 120 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track 121 * when to skip queueing 122 * a lock because it's 123 * about to be 124 * dropped. */ 125 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ 126 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ 127 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a 128 call to dlm_lock. Only 129 exists with BUSY set. */ 130 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread 131 * from downconverting 132 * before the upconvert 133 * has completed */ 134 135 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster 136 * lock has already 137 * returned, do not block 138 * dc thread from 139 * downconverting */ 140 141 struct ocfs2_lock_res_ops; 142 143 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 144 145 #ifdef CONFIG_OCFS2_FS_STATS 146 struct ocfs2_lock_stats { 147 u64 ls_total; /* Total wait in NSEC */ 148 u32 ls_gets; /* Num acquires */ 149 u32 ls_fail; /* Num failed acquires */ 150 151 /* Storing max wait in usecs saves 24 bytes per inode */ 152 u32 ls_max; /* Max wait in USEC */ 153 u64 ls_last; /* Last unlock time in USEC */ 154 }; 155 #endif 156 157 struct ocfs2_lock_res { 158 void *l_priv; 159 struct ocfs2_lock_res_ops *l_ops; 160 161 162 struct list_head l_blocked_list; 163 struct list_head l_mask_waiters; 164 struct list_head l_holders; 165 166 unsigned long l_flags; 167 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 168 unsigned int l_ro_holders; 169 unsigned int l_ex_holders; 170 signed char l_level; 171 signed char l_requested; 172 signed char l_blocking; 173 174 /* Data packed - type enum ocfs2_lock_type */ 175 unsigned char l_type; 176 177 /* used from AST/BAST funcs. */ 178 /* Data packed - enum type ocfs2_ast_action */ 179 unsigned char l_action; 180 /* Data packed - enum type ocfs2_unlock_action */ 181 unsigned char l_unlock_action; 182 unsigned int l_pending_gen; 183 184 spinlock_t l_lock; 185 186 struct ocfs2_dlm_lksb l_lksb; 187 188 wait_queue_head_t l_event; 189 190 struct list_head l_debug_list; 191 192 #ifdef CONFIG_OCFS2_FS_STATS 193 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 194 u32 l_lock_refresh; /* Disk refreshes */ 195 u64 l_lock_wait; /* First lock wait time */ 196 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 197 #endif 198 #ifdef CONFIG_DEBUG_LOCK_ALLOC 199 struct lockdep_map l_lockdep_map; 200 #endif 201 }; 202 203 enum ocfs2_orphan_reco_type { 204 ORPHAN_NO_NEED_TRUNCATE = 0, 205 ORPHAN_NEED_TRUNCATE, 206 }; 207 208 enum ocfs2_orphan_scan_state { 209 ORPHAN_SCAN_ACTIVE, 210 ORPHAN_SCAN_INACTIVE 211 }; 212 213 struct ocfs2_orphan_scan { 214 struct mutex os_lock; 215 struct ocfs2_super *os_osb; 216 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ 217 struct delayed_work os_orphan_scan_work; 218 time64_t os_scantime; /* time this node ran the scan */ 219 u32 os_count; /* tracks node specific scans */ 220 u32 os_seqno; /* tracks cluster wide scans */ 221 atomic_t os_state; /* ACTIVE or INACTIVE */ 222 }; 223 224 struct ocfs2_dlm_debug { 225 struct kref d_refcnt; 226 u32 d_filter_secs; 227 struct list_head d_lockres_tracking; 228 }; 229 230 enum ocfs2_vol_state 231 { 232 VOLUME_INIT = 0, 233 VOLUME_MOUNTED, 234 VOLUME_MOUNTED_QUOTAS, 235 VOLUME_DISMOUNTED, 236 VOLUME_DISABLED 237 }; 238 239 struct ocfs2_alloc_stats 240 { 241 atomic_t moves; 242 atomic_t local_data; 243 atomic_t bitmap_data; 244 atomic_t bg_allocs; 245 atomic_t bg_extends; 246 }; 247 248 enum ocfs2_local_alloc_state 249 { 250 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 251 * this mountpoint. */ 252 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 253 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 254 * of bits has been reduced. */ 255 OCFS2_LA_DISABLED /* Local alloc has temporarily been 256 * disabled. */ 257 }; 258 259 enum ocfs2_mount_options 260 { 261 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 262 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 263 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 264 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 265 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 266 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 267 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 268 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 269 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 270 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 271 control lists */ 272 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 273 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 274 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 275 writes */ 276 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 277 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 278 279 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ 280 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ 281 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ 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 char *uuid_str; 314 u32 uuid_hash; 315 u8 *vol_label; 316 u64 first_cluster_group_blkno; 317 u32 fs_generation; 318 319 u32 s_feature_compat; 320 u32 s_feature_incompat; 321 u32 s_feature_ro_compat; 322 323 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 324 * Could protect more on osb as it's very short lived. 325 */ 326 spinlock_t osb_lock; 327 u32 s_next_generation; 328 unsigned long osb_flags; 329 s16 s_inode_steal_slot; 330 s16 s_meta_steal_slot; 331 atomic_t s_num_inodes_stolen; 332 atomic_t s_num_meta_stolen; 333 334 unsigned long s_mount_opt; 335 unsigned int s_atime_quantum; 336 337 unsigned int max_slots; 338 unsigned int node_num; 339 int slot_num; 340 int preferred_slot; 341 int s_sectsize_bits; 342 int s_clustersize; 343 int s_clustersize_bits; 344 unsigned int s_xattr_inline_size; 345 346 atomic_t vol_state; 347 struct mutex recovery_lock; 348 struct ocfs2_recovery_map *recovery_map; 349 struct ocfs2_replay_map *replay_map; 350 struct task_struct *recovery_thread_task; 351 int disable_recovery; 352 wait_queue_head_t checkpoint_event; 353 struct ocfs2_journal *journal; 354 unsigned long osb_commit_interval; 355 356 struct delayed_work la_enable_wq; 357 358 /* 359 * Must hold local alloc i_mutex and osb->osb_lock to change 360 * local_alloc_bits. Reads can be done under either lock. 361 */ 362 unsigned int local_alloc_bits; 363 unsigned int local_alloc_default_bits; 364 /* osb_clusters_at_boot can become stale! Do not trust it to 365 * be up to date. */ 366 unsigned int osb_clusters_at_boot; 367 368 enum ocfs2_local_alloc_state local_alloc_state; /* protected 369 * by osb_lock */ 370 371 struct buffer_head *local_alloc_bh; 372 373 u64 la_last_gd; 374 375 struct ocfs2_reservation_map osb_la_resmap; 376 377 unsigned int osb_resv_level; 378 unsigned int osb_dir_resv_level; 379 380 /* Next two fields are for local node slot recovery during 381 * mount. */ 382 struct ocfs2_dinode *local_alloc_copy; 383 struct ocfs2_quota_recovery *quota_rec; 384 385 struct ocfs2_blockcheck_stats osb_ecc_stats; 386 struct ocfs2_alloc_stats alloc_stats; 387 char dev_str[20]; /* "major,minor" of the device */ 388 389 u8 osb_stackflags; 390 391 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 392 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 393 struct ocfs2_cluster_connection *cconn; 394 struct ocfs2_lock_res osb_super_lockres; 395 struct ocfs2_lock_res osb_rename_lockres; 396 struct ocfs2_lock_res osb_nfs_sync_lockres; 397 struct ocfs2_lock_res osb_trim_fs_lockres; 398 struct mutex obs_trim_fs_mutex; 399 struct ocfs2_dlm_debug *osb_dlm_debug; 400 401 struct dentry *osb_debug_root; 402 403 wait_queue_head_t recovery_event; 404 405 spinlock_t dc_task_lock; 406 struct task_struct *dc_task; 407 wait_queue_head_t dc_event; 408 unsigned long dc_wake_sequence; 409 unsigned long dc_work_sequence; 410 411 /* 412 * Any thread can add locks to the list, but the downconvert 413 * thread is the only one allowed to remove locks. Any change 414 * to this rule requires updating 415 * ocfs2_downconvert_thread_do_work(). 416 */ 417 struct list_head blocked_lock_list; 418 unsigned long blocked_lock_count; 419 420 /* List of dquot structures to drop last reference to */ 421 struct llist_head dquot_drop_list; 422 struct work_struct dquot_drop_work; 423 424 wait_queue_head_t osb_mount_event; 425 426 /* Truncate log info */ 427 struct inode *osb_tl_inode; 428 struct buffer_head *osb_tl_bh; 429 struct delayed_work osb_truncate_log_wq; 430 atomic_t osb_tl_disable; 431 /* 432 * How many clusters in our truncate log. 433 * It must be protected by osb_tl_inode->i_mutex. 434 */ 435 unsigned int truncated_clusters; 436 437 struct ocfs2_node_map osb_recovering_orphan_dirs; 438 unsigned int *osb_orphan_wipes; 439 wait_queue_head_t osb_wipe_event; 440 441 struct ocfs2_orphan_scan osb_orphan_scan; 442 443 /* used to protect metaecc calculation check of xattr. */ 444 spinlock_t osb_xattr_lock; 445 446 unsigned int osb_dx_mask; 447 u32 osb_dx_seed[4]; 448 449 /* the group we used to allocate inodes. */ 450 u64 osb_inode_alloc_group; 451 452 /* rb tree root for refcount lock. */ 453 struct rb_root osb_rf_lock_tree; 454 struct ocfs2_refcount_tree *osb_ref_tree_lru; 455 456 struct mutex system_file_mutex; 457 458 /* 459 * OCFS2 needs to schedule several different types of work which 460 * require cluster locking, disk I/O, recovery waits, etc. Since these 461 * types of work tend to be heavy we avoid using the kernel events 462 * workqueue and schedule on our own. 463 */ 464 struct workqueue_struct *ocfs2_wq; 465 466 /* sysfs directory per partition */ 467 struct kset *osb_dev_kset; 468 469 /* file check related stuff */ 470 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 471 }; 472 473 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 474 475 /* Useful typedef for passing around journal access functions */ 476 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 477 struct ocfs2_caching_info *ci, 478 struct buffer_head *bh, int type); 479 480 static inline int ocfs2_should_order_data(struct inode *inode) 481 { 482 if (!S_ISREG(inode->i_mode)) 483 return 0; 484 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 485 return 0; 486 return 1; 487 } 488 489 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 490 { 491 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 492 return 1; 493 return 0; 494 } 495 496 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 497 { 498 /* 499 * Support for sparse files is a pre-requisite 500 */ 501 if (!ocfs2_sparse_alloc(osb)) 502 return 0; 503 504 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 505 return 1; 506 return 0; 507 } 508 509 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 510 { 511 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 512 return 1; 513 return 0; 514 } 515 516 517 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 518 { 519 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 520 return 1; 521 return 0; 522 } 523 524 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 525 { 526 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 527 return 1; 528 return 0; 529 } 530 531 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 532 { 533 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 534 return 1; 535 return 0; 536 } 537 538 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 539 { 540 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 541 return 1; 542 return 0; 543 } 544 545 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 546 { 547 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 548 return 1; 549 return 0; 550 } 551 552 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 553 { 554 if (ocfs2_supports_indexed_dirs(osb)) 555 return OCFS2_DX_LINK_MAX; 556 return OCFS2_LINK_MAX; 557 } 558 559 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 560 { 561 u32 nlink = le16_to_cpu(di->i_links_count); 562 u32 hi = le16_to_cpu(di->i_links_count_hi); 563 564 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 565 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 566 567 return nlink; 568 } 569 570 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 571 { 572 u16 lo, hi; 573 574 lo = nlink; 575 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 576 577 di->i_links_count = cpu_to_le16(lo); 578 di->i_links_count_hi = cpu_to_le16(hi); 579 } 580 581 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 582 { 583 u32 links = ocfs2_read_links_count(di); 584 585 links += n; 586 587 ocfs2_set_links_count(di, links); 588 } 589 590 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 591 { 592 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 593 return 1; 594 return 0; 595 } 596 597 /* set / clear functions because cluster events can make these happen 598 * in parallel so we want the transitions to be atomic. this also 599 * means that any future flags osb_flags must be protected by spinlock 600 * too! */ 601 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 602 unsigned long flag) 603 { 604 spin_lock(&osb->osb_lock); 605 osb->osb_flags |= flag; 606 spin_unlock(&osb->osb_lock); 607 } 608 609 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 610 int hard) 611 { 612 spin_lock(&osb->osb_lock); 613 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 614 if (hard) 615 osb->osb_flags |= OCFS2_OSB_HARD_RO; 616 else 617 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 618 spin_unlock(&osb->osb_lock); 619 } 620 621 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 622 { 623 int ret; 624 625 spin_lock(&osb->osb_lock); 626 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 627 spin_unlock(&osb->osb_lock); 628 629 return ret; 630 } 631 632 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 633 { 634 int ret; 635 636 spin_lock(&osb->osb_lock); 637 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 638 spin_unlock(&osb->osb_lock); 639 640 return ret; 641 } 642 643 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 644 { 645 return (osb->s_feature_incompat & 646 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 647 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 648 } 649 650 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 651 { 652 if (ocfs2_clusterinfo_valid(osb) && 653 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 654 OCFS2_STACK_LABEL_LEN)) 655 return 1; 656 return 0; 657 } 658 659 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 660 { 661 if (ocfs2_clusterinfo_valid(osb) && 662 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 663 OCFS2_STACK_LABEL_LEN)) 664 return 1; 665 return 0; 666 } 667 668 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 669 { 670 return ocfs2_o2cb_stack(osb) && 671 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 672 } 673 674 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 675 { 676 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 677 } 678 679 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 680 { 681 return (osb->s_feature_incompat & 682 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 683 } 684 685 686 #define OCFS2_IS_VALID_DINODE(ptr) \ 687 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 688 689 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 690 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 691 692 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 693 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 694 695 696 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 697 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 698 699 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 700 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 701 702 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 703 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 704 705 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 706 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 707 708 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 709 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 710 711 static inline unsigned long ino_from_blkno(struct super_block *sb, 712 u64 blkno) 713 { 714 return (unsigned long)(blkno & (u64)ULONG_MAX); 715 } 716 717 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 718 u32 clusters) 719 { 720 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 721 sb->s_blocksize_bits; 722 723 return (u64)clusters << c_to_b_bits; 724 } 725 726 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 727 u64 blocks) 728 { 729 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 730 sb->s_blocksize_bits; 731 732 blocks += (1 << b_to_c_bits) - 1; 733 return (u32)(blocks >> b_to_c_bits); 734 } 735 736 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 737 u64 blocks) 738 { 739 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 740 sb->s_blocksize_bits; 741 742 return (u32)(blocks >> b_to_c_bits); 743 } 744 745 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 746 u64 bytes) 747 { 748 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 749 unsigned int clusters; 750 751 bytes += OCFS2_SB(sb)->s_clustersize - 1; 752 /* OCFS2 just cannot have enough clusters to overflow this */ 753 clusters = (unsigned int)(bytes >> cl_bits); 754 755 return clusters; 756 } 757 758 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 759 u64 bytes) 760 { 761 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 762 unsigned int clusters; 763 764 clusters = (unsigned int)(bytes >> cl_bits); 765 return clusters; 766 } 767 768 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 769 u64 bytes) 770 { 771 bytes += sb->s_blocksize - 1; 772 return bytes >> sb->s_blocksize_bits; 773 } 774 775 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 776 u32 clusters) 777 { 778 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 779 } 780 781 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 782 u64 blocks) 783 { 784 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 785 unsigned int clusters; 786 787 clusters = ocfs2_blocks_to_clusters(sb, blocks); 788 return (u64)clusters << bits; 789 } 790 791 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 792 u64 bytes) 793 { 794 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 795 unsigned int clusters; 796 797 clusters = ocfs2_clusters_for_bytes(sb, bytes); 798 return (u64)clusters << cl_bits; 799 } 800 801 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 802 u64 bytes) 803 { 804 u64 blocks; 805 806 blocks = ocfs2_blocks_for_bytes(sb, bytes); 807 return blocks << sb->s_blocksize_bits; 808 } 809 810 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 811 { 812 return (unsigned long)((bytes + 511) >> 9); 813 } 814 815 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 816 unsigned long pg_index) 817 { 818 u32 clusters = pg_index; 819 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 820 821 if (unlikely(PAGE_SHIFT > cbits)) 822 clusters = pg_index << (PAGE_SHIFT - cbits); 823 else if (PAGE_SHIFT < cbits) 824 clusters = pg_index >> (cbits - PAGE_SHIFT); 825 826 return clusters; 827 } 828 829 /* 830 * Find the 1st page index which covers the given clusters. 831 */ 832 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 833 u32 clusters) 834 { 835 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 836 pgoff_t index = clusters; 837 838 if (PAGE_SHIFT > cbits) { 839 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 840 } else if (PAGE_SHIFT < cbits) { 841 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 842 } 843 844 return index; 845 } 846 847 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 848 { 849 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 850 unsigned int pages_per_cluster = 1; 851 852 if (PAGE_SHIFT < cbits) 853 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 854 855 return pages_per_cluster; 856 } 857 858 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 859 unsigned int megs) 860 { 861 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 862 863 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 864 } 865 866 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 867 unsigned int clusters) 868 { 869 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 870 } 871 872 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 873 { 874 __set_bit_le(bit, bitmap); 875 } 876 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 877 878 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 879 { 880 __clear_bit_le(bit, bitmap); 881 } 882 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 883 884 #define ocfs2_test_bit test_bit_le 885 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 886 #define ocfs2_find_next_bit find_next_bit_le 887 888 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 889 { 890 #if BITS_PER_LONG == 64 891 *bit += ((unsigned long) addr & 7UL) << 3; 892 addr = (void *) ((unsigned long) addr & ~7UL); 893 #elif BITS_PER_LONG == 32 894 *bit += ((unsigned long) addr & 3UL) << 3; 895 addr = (void *) ((unsigned long) addr & ~3UL); 896 #else 897 #error "how many bits you are?!" 898 #endif 899 return addr; 900 } 901 902 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 903 { 904 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 905 ocfs2_set_bit(bit, bitmap); 906 } 907 908 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 909 { 910 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 911 ocfs2_clear_bit(bit, bitmap); 912 } 913 914 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 915 { 916 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 917 return ocfs2_test_bit(bit, bitmap); 918 } 919 920 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 921 int start) 922 { 923 int fix = 0, ret, tmpmax; 924 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 925 tmpmax = max + fix; 926 start += fix; 927 928 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 929 if (ret > max) 930 return max; 931 return ret; 932 } 933 934 #endif /* OCFS2_H */ 935 936