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 const 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_triggers { 288 struct jbd2_buffer_trigger_type ot_triggers; 289 int ot_offset; 290 struct super_block *sb; 291 }; 292 293 enum ocfs2_journal_trigger_type { 294 OCFS2_JTR_DI, 295 OCFS2_JTR_EB, 296 OCFS2_JTR_RB, 297 OCFS2_JTR_GD, 298 OCFS2_JTR_DB, 299 OCFS2_JTR_XB, 300 OCFS2_JTR_DQ, 301 OCFS2_JTR_DR, 302 OCFS2_JTR_DL, 303 OCFS2_JTR_NONE /* This must be the last entry */ 304 }; 305 306 #define OCFS2_JOURNAL_TRIGGER_COUNT OCFS2_JTR_NONE 307 308 void ocfs2_initialize_journal_triggers(struct super_block *sb, 309 struct ocfs2_triggers triggers[]); 310 311 enum ocfs2_recovery_state { 312 OCFS2_REC_ENABLED = 0, 313 OCFS2_REC_QUOTA_WANT_DISABLE, 314 /* 315 * Must be OCFS2_REC_QUOTA_WANT_DISABLE + 1 for 316 * ocfs2_recovery_disable_quota() to work. 317 */ 318 OCFS2_REC_QUOTA_DISABLED, 319 OCFS2_REC_WANT_DISABLE, 320 /* 321 * Must be OCFS2_REC_WANT_DISABLE + 1 for ocfs2_recovery_exit() to work 322 */ 323 OCFS2_REC_DISABLED, 324 }; 325 326 struct ocfs2_journal; 327 struct ocfs2_slot_info; 328 struct ocfs2_recovery_map; 329 struct ocfs2_replay_map; 330 struct ocfs2_quota_recovery; 331 struct ocfs2_super 332 { 333 struct task_struct *commit_task; 334 struct super_block *sb; 335 struct inode *root_inode; 336 struct inode *sys_root_inode; 337 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 338 struct inode **local_system_inodes; 339 340 struct ocfs2_slot_info *slot_info; 341 342 u32 *slot_recovery_generations; 343 344 spinlock_t node_map_lock; 345 346 u64 root_blkno; 347 u64 system_dir_blkno; 348 u64 bitmap_blkno; 349 u32 bitmap_cpg; 350 char *uuid_str; 351 u32 uuid_hash; 352 u8 *vol_label; 353 u64 first_cluster_group_blkno; 354 u32 fs_generation; 355 356 u32 s_feature_compat; 357 u32 s_feature_incompat; 358 u32 s_feature_ro_compat; 359 360 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 361 * Could protect more on osb as it's very short lived. 362 */ 363 spinlock_t osb_lock; 364 u32 s_next_generation; 365 unsigned long osb_flags; 366 u16 s_inode_steal_slot; 367 u16 s_meta_steal_slot; 368 atomic_t s_num_inodes_stolen; 369 atomic_t s_num_meta_stolen; 370 371 unsigned long s_mount_opt; 372 unsigned int s_atime_quantum; 373 374 unsigned int max_slots; 375 unsigned int node_num; 376 int slot_num; 377 int preferred_slot; 378 int s_sectsize_bits; 379 int s_clustersize; 380 int s_clustersize_bits; 381 unsigned int s_xattr_inline_size; 382 383 atomic_t vol_state; 384 struct mutex recovery_lock; 385 struct ocfs2_recovery_map *recovery_map; 386 struct ocfs2_replay_map *replay_map; 387 struct task_struct *recovery_thread_task; 388 enum ocfs2_recovery_state recovery_state; 389 wait_queue_head_t checkpoint_event; 390 struct ocfs2_journal *journal; 391 unsigned long osb_commit_interval; 392 393 /* Journal triggers for checksum */ 394 struct ocfs2_triggers s_journal_triggers[OCFS2_JOURNAL_TRIGGER_COUNT]; 395 396 struct delayed_work la_enable_wq; 397 398 /* 399 * Must hold local alloc i_rwsem and osb->osb_lock to change 400 * local_alloc_bits. Reads can be done under either lock. 401 */ 402 unsigned int local_alloc_bits; 403 unsigned int local_alloc_default_bits; 404 /* osb_clusters_at_boot can become stale! Do not trust it to 405 * be up to date. */ 406 unsigned int osb_clusters_at_boot; 407 408 enum ocfs2_local_alloc_state local_alloc_state; /* protected 409 * by osb_lock */ 410 411 struct buffer_head *local_alloc_bh; 412 413 u64 la_last_gd; 414 415 struct ocfs2_reservation_map osb_la_resmap; 416 417 unsigned int osb_resv_level; 418 unsigned int osb_dir_resv_level; 419 420 /* Next two fields are for local node slot recovery during 421 * mount. */ 422 struct ocfs2_dinode *local_alloc_copy; 423 struct ocfs2_quota_recovery *quota_rec; 424 425 struct ocfs2_blockcheck_stats osb_ecc_stats; 426 struct ocfs2_alloc_stats alloc_stats; 427 char dev_str[20]; /* "major,minor" of the device */ 428 429 u8 osb_stackflags; 430 431 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 432 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 433 struct ocfs2_cluster_connection *cconn; 434 struct ocfs2_lock_res osb_super_lockres; 435 struct ocfs2_lock_res osb_rename_lockres; 436 struct ocfs2_lock_res osb_nfs_sync_lockres; 437 struct rw_semaphore nfs_sync_rwlock; 438 struct ocfs2_lock_res osb_trim_fs_lockres; 439 struct mutex obs_trim_fs_mutex; 440 struct ocfs2_dlm_debug *osb_dlm_debug; 441 442 struct dentry *osb_debug_root; 443 444 wait_queue_head_t recovery_event; 445 446 spinlock_t dc_task_lock; 447 struct task_struct *dc_task; 448 wait_queue_head_t dc_event; 449 unsigned long dc_wake_sequence; 450 unsigned long dc_work_sequence; 451 452 /* 453 * Any thread can add locks to the list, but the downconvert 454 * thread is the only one allowed to remove locks. Any change 455 * to this rule requires updating 456 * ocfs2_downconvert_thread_do_work(). 457 */ 458 struct list_head blocked_lock_list; 459 unsigned long blocked_lock_count; 460 461 /* List of dquot structures to drop last reference to */ 462 struct llist_head dquot_drop_list; 463 struct work_struct dquot_drop_work; 464 465 wait_queue_head_t osb_mount_event; 466 467 /* Truncate log info */ 468 struct inode *osb_tl_inode; 469 struct buffer_head *osb_tl_bh; 470 struct delayed_work osb_truncate_log_wq; 471 atomic_t osb_tl_disable; 472 /* 473 * How many clusters in our truncate log. 474 * It must be protected by osb_tl_inode->i_rwsem. 475 */ 476 unsigned int truncated_clusters; 477 478 struct ocfs2_node_map osb_recovering_orphan_dirs; 479 unsigned int *osb_orphan_wipes; 480 wait_queue_head_t osb_wipe_event; 481 482 struct ocfs2_orphan_scan osb_orphan_scan; 483 484 /* used to protect metaecc calculation check of xattr. */ 485 spinlock_t osb_xattr_lock; 486 487 unsigned int osb_dx_mask; 488 u32 osb_dx_seed[4]; 489 490 /* the group we used to allocate inodes. */ 491 u64 osb_inode_alloc_group; 492 493 /* rb tree root for refcount lock. */ 494 struct rb_root osb_rf_lock_tree; 495 struct ocfs2_refcount_tree *osb_ref_tree_lru; 496 497 struct mutex system_file_mutex; 498 499 /* 500 * OCFS2 needs to schedule several different types of work which 501 * require cluster locking, disk I/O, recovery waits, etc. Since these 502 * types of work tend to be heavy we avoid using the kernel events 503 * workqueue and schedule on our own. 504 */ 505 struct workqueue_struct *ocfs2_wq; 506 507 /* sysfs directory per partition */ 508 struct kset *osb_dev_kset; 509 510 /* file check related stuff */ 511 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 512 }; 513 514 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 515 516 /* Useful typedef for passing around journal access functions */ 517 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 518 struct ocfs2_caching_info *ci, 519 struct buffer_head *bh, int type); 520 521 static inline int ocfs2_should_order_data(struct inode *inode) 522 { 523 if (!S_ISREG(inode->i_mode)) 524 return 0; 525 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 526 return 0; 527 return 1; 528 } 529 530 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 531 { 532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 533 return 1; 534 return 0; 535 } 536 537 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 538 { 539 /* 540 * Support for sparse files is a pre-requisite 541 */ 542 if (!ocfs2_sparse_alloc(osb)) 543 return 0; 544 545 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 546 return 1; 547 return 0; 548 } 549 550 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 551 { 552 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 553 return 1; 554 return 0; 555 } 556 557 558 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 559 { 560 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 561 return 1; 562 return 0; 563 } 564 565 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 566 { 567 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 568 return 1; 569 return 0; 570 } 571 572 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 573 { 574 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 575 return 1; 576 return 0; 577 } 578 579 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 580 { 581 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 582 return 1; 583 return 0; 584 } 585 586 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 587 { 588 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 589 return 1; 590 return 0; 591 } 592 593 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 594 { 595 if (ocfs2_supports_indexed_dirs(osb)) 596 return OCFS2_DX_LINK_MAX; 597 return OCFS2_LINK_MAX; 598 } 599 600 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 601 { 602 u32 nlink = le16_to_cpu(di->i_links_count); 603 u32 hi = le16_to_cpu(di->i_links_count_hi); 604 605 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 606 607 return nlink; 608 } 609 610 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 611 { 612 u16 lo, hi; 613 614 lo = nlink; 615 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 616 617 di->i_links_count = cpu_to_le16(lo); 618 di->i_links_count_hi = cpu_to_le16(hi); 619 } 620 621 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 622 { 623 u32 links = ocfs2_read_links_count(di); 624 625 links += n; 626 627 ocfs2_set_links_count(di, links); 628 } 629 630 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 631 { 632 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 633 return 1; 634 return 0; 635 } 636 637 /* set / clear functions because cluster events can make these happen 638 * in parallel so we want the transitions to be atomic. this also 639 * means that any future flags osb_flags must be protected by spinlock 640 * too! */ 641 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 642 unsigned long flag) 643 { 644 spin_lock(&osb->osb_lock); 645 osb->osb_flags |= flag; 646 spin_unlock(&osb->osb_lock); 647 } 648 649 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 650 int hard) 651 { 652 spin_lock(&osb->osb_lock); 653 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 654 if (hard) 655 osb->osb_flags |= OCFS2_OSB_HARD_RO; 656 else 657 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 658 spin_unlock(&osb->osb_lock); 659 } 660 661 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 662 { 663 int ret; 664 665 spin_lock(&osb->osb_lock); 666 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 667 spin_unlock(&osb->osb_lock); 668 669 return ret; 670 } 671 672 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 673 { 674 int ret; 675 676 spin_lock(&osb->osb_lock); 677 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 678 spin_unlock(&osb->osb_lock); 679 680 return ret; 681 } 682 683 static inline int ocfs2_is_readonly(struct ocfs2_super *osb) 684 { 685 int ret; 686 spin_lock(&osb->osb_lock); 687 ret = osb->osb_flags & (OCFS2_OSB_SOFT_RO | OCFS2_OSB_HARD_RO); 688 spin_unlock(&osb->osb_lock); 689 690 return ret; 691 } 692 693 static inline int ocfs2_emergency_state(struct ocfs2_super *osb) 694 { 695 if (ocfs2_is_readonly(osb)) 696 return -EROFS; 697 698 return 0; 699 } 700 701 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 702 { 703 return (osb->s_feature_incompat & 704 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 705 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 706 } 707 708 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 709 { 710 if (ocfs2_clusterinfo_valid(osb) && 711 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 712 OCFS2_STACK_LABEL_LEN)) 713 return 1; 714 return 0; 715 } 716 717 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 718 { 719 if (ocfs2_clusterinfo_valid(osb) && 720 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 721 OCFS2_STACK_LABEL_LEN)) 722 return 1; 723 return 0; 724 } 725 726 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 727 { 728 return ocfs2_o2cb_stack(osb) && 729 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 730 } 731 732 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 733 { 734 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 735 } 736 737 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 738 { 739 return (osb->s_feature_incompat & 740 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 741 } 742 743 744 #define OCFS2_IS_VALID_DINODE(ptr) \ 745 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 746 747 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 748 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 749 750 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 751 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 752 753 754 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 755 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 756 757 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 758 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 759 760 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 761 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 762 763 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 764 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 765 766 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 767 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 768 769 static inline unsigned long ino_from_blkno(struct super_block *sb, 770 u64 blkno) 771 { 772 return (unsigned long)(blkno & (u64)ULONG_MAX); 773 } 774 775 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 776 u32 clusters) 777 { 778 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 779 sb->s_blocksize_bits; 780 781 return (u64)clusters << c_to_b_bits; 782 } 783 784 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 785 u64 blocks) 786 { 787 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 788 sb->s_blocksize_bits; 789 790 blocks += (1 << b_to_c_bits) - 1; 791 return (u32)(blocks >> b_to_c_bits); 792 } 793 794 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 795 u64 blocks) 796 { 797 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 798 sb->s_blocksize_bits; 799 800 return (u32)(blocks >> b_to_c_bits); 801 } 802 803 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 804 u64 bytes) 805 { 806 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 807 unsigned int clusters; 808 809 bytes += OCFS2_SB(sb)->s_clustersize - 1; 810 /* OCFS2 just cannot have enough clusters to overflow this */ 811 clusters = (unsigned int)(bytes >> cl_bits); 812 813 return clusters; 814 } 815 816 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 817 u64 bytes) 818 { 819 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 820 unsigned int clusters; 821 822 clusters = (unsigned int)(bytes >> cl_bits); 823 return clusters; 824 } 825 826 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 827 u64 bytes) 828 { 829 bytes += sb->s_blocksize - 1; 830 return bytes >> sb->s_blocksize_bits; 831 } 832 833 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 834 u32 clusters) 835 { 836 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 837 } 838 839 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 840 u64 blocks) 841 { 842 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 843 unsigned int clusters; 844 845 clusters = ocfs2_blocks_to_clusters(sb, blocks); 846 return (u64)clusters << bits; 847 } 848 849 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 850 u64 bytes) 851 { 852 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 853 unsigned int clusters; 854 855 clusters = ocfs2_clusters_for_bytes(sb, bytes); 856 return (u64)clusters << cl_bits; 857 } 858 859 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 860 u64 bytes) 861 { 862 u64 blocks; 863 864 blocks = ocfs2_blocks_for_bytes(sb, bytes); 865 return blocks << sb->s_blocksize_bits; 866 } 867 868 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 869 { 870 return (unsigned long)((bytes + 511) >> 9); 871 } 872 873 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 874 unsigned long pg_index) 875 { 876 u32 clusters = pg_index; 877 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 878 879 if (unlikely(PAGE_SHIFT > cbits)) 880 clusters = pg_index << (PAGE_SHIFT - cbits); 881 else if (PAGE_SHIFT < cbits) 882 clusters = pg_index >> (cbits - PAGE_SHIFT); 883 884 return clusters; 885 } 886 887 /* 888 * Find the 1st page index which covers the given clusters. 889 */ 890 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 891 u32 clusters) 892 { 893 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 894 pgoff_t index = clusters; 895 896 if (PAGE_SHIFT > cbits) { 897 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 898 } else if (PAGE_SHIFT < cbits) { 899 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 900 } 901 902 return index; 903 } 904 905 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 906 { 907 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 908 unsigned int pages_per_cluster = 1; 909 910 if (PAGE_SHIFT < cbits) 911 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 912 913 return pages_per_cluster; 914 } 915 916 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 917 unsigned int megs) 918 { 919 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 920 921 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 922 } 923 924 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 925 unsigned int clusters) 926 { 927 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 928 } 929 930 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 931 { 932 __set_bit_le(bit, bitmap); 933 } 934 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 935 936 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 937 { 938 __clear_bit_le(bit, bitmap); 939 } 940 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 941 942 #define ocfs2_test_bit test_bit_le 943 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 944 #define ocfs2_find_next_bit find_next_bit_le 945 946 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 947 { 948 #if BITS_PER_LONG == 64 949 *bit += ((unsigned long) addr & 7UL) << 3; 950 addr = (void *) ((unsigned long) addr & ~7UL); 951 #elif BITS_PER_LONG == 32 952 *bit += ((unsigned long) addr & 3UL) << 3; 953 addr = (void *) ((unsigned long) addr & ~3UL); 954 #else 955 #error "how many bits you are?!" 956 #endif 957 return addr; 958 } 959 960 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 961 { 962 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 963 ocfs2_set_bit(bit, bitmap); 964 } 965 966 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 967 { 968 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 969 ocfs2_clear_bit(bit, bitmap); 970 } 971 972 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 973 { 974 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 975 return ocfs2_test_bit(bit, bitmap); 976 } 977 978 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 979 int start) 980 { 981 int fix = 0, ret, tmpmax; 982 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 983 tmpmax = max + fix; 984 start += fix; 985 986 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 987 if (ret > max) 988 return max; 989 return ret; 990 } 991 992 #endif /* OCFS2_H */ 993 994