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 OCFS2_MOUNT_NOCLUSTER = 1 << 18, /* No cluster aware filesystem mount */ 283 }; 284 285 #define OCFS2_OSB_SOFT_RO 0x0001 286 #define OCFS2_OSB_HARD_RO 0x0002 287 #define OCFS2_OSB_ERROR_FS 0x0004 288 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 289 290 struct ocfs2_journal; 291 struct ocfs2_slot_info; 292 struct ocfs2_recovery_map; 293 struct ocfs2_replay_map; 294 struct ocfs2_quota_recovery; 295 struct ocfs2_super 296 { 297 struct task_struct *commit_task; 298 struct super_block *sb; 299 struct inode *root_inode; 300 struct inode *sys_root_inode; 301 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 302 struct inode **local_system_inodes; 303 304 struct ocfs2_slot_info *slot_info; 305 306 u32 *slot_recovery_generations; 307 308 spinlock_t node_map_lock; 309 310 u64 root_blkno; 311 u64 system_dir_blkno; 312 u64 bitmap_blkno; 313 u32 bitmap_cpg; 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 two fields are for local node slot recovery during 382 * mount. */ 383 struct ocfs2_dinode *local_alloc_copy; 384 struct ocfs2_quota_recovery *quota_rec; 385 386 struct ocfs2_blockcheck_stats osb_ecc_stats; 387 struct ocfs2_alloc_stats alloc_stats; 388 char dev_str[20]; /* "major,minor" of the device */ 389 390 u8 osb_stackflags; 391 392 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 393 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 394 struct ocfs2_cluster_connection *cconn; 395 struct ocfs2_lock_res osb_super_lockres; 396 struct ocfs2_lock_res osb_rename_lockres; 397 struct ocfs2_lock_res osb_nfs_sync_lockres; 398 struct ocfs2_lock_res osb_trim_fs_lockres; 399 struct mutex obs_trim_fs_mutex; 400 struct ocfs2_dlm_debug *osb_dlm_debug; 401 402 struct dentry *osb_debug_root; 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 * OCFS2 needs to schedule several different types of work which 461 * require cluster locking, disk I/O, recovery waits, etc. Since these 462 * types of work tend to be heavy we avoid using the kernel events 463 * workqueue and schedule on our own. 464 */ 465 struct workqueue_struct *ocfs2_wq; 466 467 /* sysfs directory per partition */ 468 struct kset *osb_dev_kset; 469 470 /* file check related stuff */ 471 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 472 }; 473 474 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 475 476 /* Useful typedef for passing around journal access functions */ 477 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 478 struct ocfs2_caching_info *ci, 479 struct buffer_head *bh, int type); 480 481 static inline int ocfs2_should_order_data(struct inode *inode) 482 { 483 if (!S_ISREG(inode->i_mode)) 484 return 0; 485 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 486 return 0; 487 return 1; 488 } 489 490 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 491 { 492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 493 return 1; 494 return 0; 495 } 496 497 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 498 { 499 /* 500 * Support for sparse files is a pre-requisite 501 */ 502 if (!ocfs2_sparse_alloc(osb)) 503 return 0; 504 505 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 506 return 1; 507 return 0; 508 } 509 510 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 511 { 512 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 513 return 1; 514 return 0; 515 } 516 517 518 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 519 { 520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 521 return 1; 522 return 0; 523 } 524 525 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 526 { 527 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 528 return 1; 529 return 0; 530 } 531 532 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 533 { 534 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 535 return 1; 536 return 0; 537 } 538 539 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 540 { 541 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 542 return 1; 543 return 0; 544 } 545 546 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 547 { 548 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 549 return 1; 550 return 0; 551 } 552 553 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 554 { 555 if (ocfs2_supports_indexed_dirs(osb)) 556 return OCFS2_DX_LINK_MAX; 557 return OCFS2_LINK_MAX; 558 } 559 560 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 561 { 562 u32 nlink = le16_to_cpu(di->i_links_count); 563 u32 hi = le16_to_cpu(di->i_links_count_hi); 564 565 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 566 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 567 568 return nlink; 569 } 570 571 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 572 { 573 u16 lo, hi; 574 575 lo = nlink; 576 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 577 578 di->i_links_count = cpu_to_le16(lo); 579 di->i_links_count_hi = cpu_to_le16(hi); 580 } 581 582 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 583 { 584 u32 links = ocfs2_read_links_count(di); 585 586 links += n; 587 588 ocfs2_set_links_count(di, links); 589 } 590 591 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 592 { 593 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 594 return 1; 595 return 0; 596 } 597 598 /* set / clear functions because cluster events can make these happen 599 * in parallel so we want the transitions to be atomic. this also 600 * means that any future flags osb_flags must be protected by spinlock 601 * too! */ 602 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 603 unsigned long flag) 604 { 605 spin_lock(&osb->osb_lock); 606 osb->osb_flags |= flag; 607 spin_unlock(&osb->osb_lock); 608 } 609 610 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 611 int hard) 612 { 613 spin_lock(&osb->osb_lock); 614 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 615 if (hard) 616 osb->osb_flags |= OCFS2_OSB_HARD_RO; 617 else 618 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 619 spin_unlock(&osb->osb_lock); 620 } 621 622 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 623 { 624 int ret; 625 626 spin_lock(&osb->osb_lock); 627 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 628 spin_unlock(&osb->osb_lock); 629 630 return ret; 631 } 632 633 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 634 { 635 int ret; 636 637 spin_lock(&osb->osb_lock); 638 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 639 spin_unlock(&osb->osb_lock); 640 641 return ret; 642 } 643 644 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 645 { 646 return (osb->s_feature_incompat & 647 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 648 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 649 } 650 651 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 652 { 653 if (ocfs2_clusterinfo_valid(osb) && 654 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 655 OCFS2_STACK_LABEL_LEN)) 656 return 1; 657 return 0; 658 } 659 660 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 661 { 662 if (ocfs2_clusterinfo_valid(osb) && 663 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 664 OCFS2_STACK_LABEL_LEN)) 665 return 1; 666 return 0; 667 } 668 669 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 670 { 671 return ocfs2_o2cb_stack(osb) && 672 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 673 } 674 675 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 676 { 677 return ((osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT) 678 || (osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER)); 679 } 680 681 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 682 { 683 return (osb->s_feature_incompat & 684 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 685 } 686 687 688 #define OCFS2_IS_VALID_DINODE(ptr) \ 689 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 690 691 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 692 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 693 694 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 695 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 696 697 698 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 699 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 700 701 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 702 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 703 704 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 705 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 706 707 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 708 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 709 710 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 711 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 712 713 static inline unsigned long ino_from_blkno(struct super_block *sb, 714 u64 blkno) 715 { 716 return (unsigned long)(blkno & (u64)ULONG_MAX); 717 } 718 719 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 720 u32 clusters) 721 { 722 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 723 sb->s_blocksize_bits; 724 725 return (u64)clusters << c_to_b_bits; 726 } 727 728 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 729 u64 blocks) 730 { 731 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 732 sb->s_blocksize_bits; 733 734 blocks += (1 << b_to_c_bits) - 1; 735 return (u32)(blocks >> b_to_c_bits); 736 } 737 738 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 739 u64 blocks) 740 { 741 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 742 sb->s_blocksize_bits; 743 744 return (u32)(blocks >> b_to_c_bits); 745 } 746 747 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 748 u64 bytes) 749 { 750 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 751 unsigned int clusters; 752 753 bytes += OCFS2_SB(sb)->s_clustersize - 1; 754 /* OCFS2 just cannot have enough clusters to overflow this */ 755 clusters = (unsigned int)(bytes >> cl_bits); 756 757 return clusters; 758 } 759 760 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 761 u64 bytes) 762 { 763 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 764 unsigned int clusters; 765 766 clusters = (unsigned int)(bytes >> cl_bits); 767 return clusters; 768 } 769 770 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 771 u64 bytes) 772 { 773 bytes += sb->s_blocksize - 1; 774 return bytes >> sb->s_blocksize_bits; 775 } 776 777 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 778 u32 clusters) 779 { 780 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 781 } 782 783 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 784 u64 blocks) 785 { 786 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 787 unsigned int clusters; 788 789 clusters = ocfs2_blocks_to_clusters(sb, blocks); 790 return (u64)clusters << bits; 791 } 792 793 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 794 u64 bytes) 795 { 796 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 797 unsigned int clusters; 798 799 clusters = ocfs2_clusters_for_bytes(sb, bytes); 800 return (u64)clusters << cl_bits; 801 } 802 803 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 804 u64 bytes) 805 { 806 u64 blocks; 807 808 blocks = ocfs2_blocks_for_bytes(sb, bytes); 809 return blocks << sb->s_blocksize_bits; 810 } 811 812 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 813 { 814 return (unsigned long)((bytes + 511) >> 9); 815 } 816 817 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 818 unsigned long pg_index) 819 { 820 u32 clusters = pg_index; 821 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 822 823 if (unlikely(PAGE_SHIFT > cbits)) 824 clusters = pg_index << (PAGE_SHIFT - cbits); 825 else if (PAGE_SHIFT < cbits) 826 clusters = pg_index >> (cbits - PAGE_SHIFT); 827 828 return clusters; 829 } 830 831 /* 832 * Find the 1st page index which covers the given clusters. 833 */ 834 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 835 u32 clusters) 836 { 837 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 838 pgoff_t index = clusters; 839 840 if (PAGE_SHIFT > cbits) { 841 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 842 } else if (PAGE_SHIFT < cbits) { 843 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 844 } 845 846 return index; 847 } 848 849 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 850 { 851 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 852 unsigned int pages_per_cluster = 1; 853 854 if (PAGE_SHIFT < cbits) 855 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 856 857 return pages_per_cluster; 858 } 859 860 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 861 unsigned int megs) 862 { 863 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 864 865 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 866 } 867 868 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 869 unsigned int clusters) 870 { 871 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 872 } 873 874 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 875 { 876 __set_bit_le(bit, bitmap); 877 } 878 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 879 880 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 881 { 882 __clear_bit_le(bit, bitmap); 883 } 884 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 885 886 #define ocfs2_test_bit test_bit_le 887 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 888 #define ocfs2_find_next_bit find_next_bit_le 889 890 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 891 { 892 #if BITS_PER_LONG == 64 893 *bit += ((unsigned long) addr & 7UL) << 3; 894 addr = (void *) ((unsigned long) addr & ~7UL); 895 #elif BITS_PER_LONG == 32 896 *bit += ((unsigned long) addr & 3UL) << 3; 897 addr = (void *) ((unsigned long) addr & ~3UL); 898 #else 899 #error "how many bits you are?!" 900 #endif 901 return addr; 902 } 903 904 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 905 { 906 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 907 ocfs2_set_bit(bit, bitmap); 908 } 909 910 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 911 { 912 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 913 ocfs2_clear_bit(bit, bitmap); 914 } 915 916 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 917 { 918 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 919 return ocfs2_test_bit(bit, bitmap); 920 } 921 922 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 923 int start) 924 { 925 int fix = 0, ret, tmpmax; 926 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 927 tmpmax = max + fix; 928 start += fix; 929 930 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 931 if (ret > max) 932 return max; 933 return ret; 934 } 935 936 #endif /* OCFS2_H */ 937 938