include/linux/reiserfs_fs_sb.h

   1 /* Copyright 1996-2000 Hans Reiser, see reiserfs/README for licensing
   2  * and copyright details */
   3
   4 #ifndef _LINUX_REISER_FS_SB
   5 #define _LINUX_REISER_FS_SB
   6
   7 #ifdef __KERNEL__
   8 #include <linux/workqueue.h>
   9 #include <linux/rwsem.h>
  10 #include <linux/mutex.h>
  11 #include <linux/sched.h>
  12 #endif
  13
  14 typedef enum {
  15         reiserfs_attrs_cleared = 0x00000001,
  16 } reiserfs_super_block_flags;
  17
  18 /* struct reiserfs_super_block accessors/mutators
  19  * since this is a disk structure, it will always be in
  20  * little endian format. */
  21 #define sb_block_count(sbp)         (le32_to_cpu((sbp)->s_v1.s_block_count))
  22 #define set_sb_block_count(sbp,v)   ((sbp)->s_v1.s_block_count = cpu_to_le32(v))
  23 #define sb_free_blocks(sbp)         (le32_to_cpu((sbp)->s_v1.s_free_blocks))
  24 #define set_sb_free_blocks(sbp,v)   ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v))
  25 #define sb_root_block(sbp)          (le32_to_cpu((sbp)->s_v1.s_root_block))
  26 #define set_sb_root_block(sbp,v)    ((sbp)->s_v1.s_root_block = cpu_to_le32(v))
  27
  28 #define sb_jp_journal_1st_block(sbp)  \
  29               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block))
  30 #define set_sb_jp_journal_1st_block(sbp,v) \
  31               ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v))
  32 #define sb_jp_journal_dev(sbp) \
  33               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev))
  34 #define set_sb_jp_journal_dev(sbp,v) \
  35               ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v))
  36 #define sb_jp_journal_size(sbp) \
  37               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size))
  38 #define set_sb_jp_journal_size(sbp,v) \
  39               ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v))
  40 #define sb_jp_journal_trans_max(sbp) \
  41               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max))
  42 #define set_sb_jp_journal_trans_max(sbp,v) \
  43               ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v))
  44 #define sb_jp_journal_magic(sbp) \
  45               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic))
  46 #define set_sb_jp_journal_magic(sbp,v) \
  47               ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v))
  48 #define sb_jp_journal_max_batch(sbp) \
  49               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch))
  50 #define set_sb_jp_journal_max_batch(sbp,v) \
  51               ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v))
  52 #define sb_jp_jourmal_max_commit_age(sbp) \
  53               (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age))
  54 #define set_sb_jp_journal_max_commit_age(sbp,v) \
  55               ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v))
  56
  57 #define sb_blocksize(sbp)          (le16_to_cpu((sbp)->s_v1.s_blocksize))
  58 #define set_sb_blocksize(sbp,v)    ((sbp)->s_v1.s_blocksize = cpu_to_le16(v))
  59 #define sb_oid_maxsize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_maxsize))
  60 #define set_sb_oid_maxsize(sbp,v)  ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v))
  61 #define sb_oid_cursize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_cursize))
  62 #define set_sb_oid_cursize(sbp,v)  ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v))
  63 #define sb_umount_state(sbp)       (le16_to_cpu((sbp)->s_v1.s_umount_state))
  64 #define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v))
  65 #define sb_fs_state(sbp)           (le16_to_cpu((sbp)->s_v1.s_fs_state))
  66 #define set_sb_fs_state(sbp,v)     ((sbp)->s_v1.s_fs_state = cpu_to_le16(v))
  67 #define sb_hash_function_code(sbp) \
  68               (le32_to_cpu((sbp)->s_v1.s_hash_function_code))
  69 #define set_sb_hash_function_code(sbp,v) \
  70               ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v))
  71 #define sb_tree_height(sbp)        (le16_to_cpu((sbp)->s_v1.s_tree_height))
  72 #define set_sb_tree_height(sbp,v)  ((sbp)->s_v1.s_tree_height = cpu_to_le16(v))
  73 #define sb_bmap_nr(sbp)            (le16_to_cpu((sbp)->s_v1.s_bmap_nr))
  74 #define set_sb_bmap_nr(sbp,v)      ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v))
  75 #define sb_version(sbp)            (le16_to_cpu((sbp)->s_v1.s_version))
  76 #define set_sb_version(sbp,v)      ((sbp)->s_v1.s_version = cpu_to_le16(v))
  77
  78 #define sb_mnt_count(sbp)          (le16_to_cpu((sbp)->s_mnt_count))
  79 #define set_sb_mnt_count(sbp, v)   ((sbp)->s_mnt_count = cpu_to_le16(v))
  80
  81 #define sb_reserved_for_journal(sbp) \
  82               (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal))
  83 #define set_sb_reserved_for_journal(sbp,v) \
  84               ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v))
  85
  86 /* LOGGING -- */
  87
  88 /* These all interelate for performance.
  89 **
  90 ** If the journal block count is smaller than n transactions, you lose speed.
  91 ** I don't know what n is yet, I'm guessing 8-16.
  92 **
  93 ** typical transaction size depends on the application, how often fsync is
  94 ** called, and how many metadata blocks you dirty in a 30 second period.
  95 ** The more small files (<16k) you use, the larger your transactions will
  96 ** be.
  97 **
  98 ** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal
  99 ** to wrap, which slows things down.  If you need high speed meta data updates, the journal should be big enough
 100 ** to prevent wrapping before dirty meta blocks get to disk.
 101 **
 102 ** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal
 103 ** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.
 104 **
 105 ** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.
 106 **
 107 */
 108
 109 /* don't mess with these for a while */
 110                                 /* we have a node size define somewhere in reiserfs_fs.h. -Hans */
 111 #define JOURNAL_BLOCK_SIZE  4096        /* BUG gotta get rid of this */
 112 #define JOURNAL_MAX_CNODE   1500        /* max cnodes to allocate. */
 113 #define JOURNAL_HASH_SIZE 8192
 114 #define JOURNAL_NUM_BITMAPS 5   /* number of copies of the bitmaps to have floating.  Must be >= 2 */
 115
 116 /* One of these for every block in every transaction
 117 ** Each one is in two hash tables.  First, a hash of the current transaction, and after journal_end, a
 118 ** hash of all the in memory transactions.
 119 ** next and prev are used by the current transaction (journal_hash).
 120 ** hnext and hprev are used by journal_list_hash.  If a block is in more than one transaction, the journal_list_hash
 121 ** links it in multiple times.  This allows flush_journal_list to remove just the cnode belonging
 122 ** to a given transaction.
 123 */
 124 struct reiserfs_journal_cnode {
 125         struct buffer_head *bh; /* real buffer head */
 126         struct super_block *sb; /* dev of real buffer head */
 127         __u32 blocknr;          /* block number of real buffer head, == 0 when buffer on disk */
 128         unsigned long state;
 129         struct reiserfs_journal_list *jlist;    /* journal list this cnode lives in */
 130         struct reiserfs_journal_cnode *next;    /* next in transaction list */
 131         struct reiserfs_journal_cnode *prev;    /* prev in transaction list */
 132         struct reiserfs_journal_cnode *hprev;   /* prev in hash list */
 133         struct reiserfs_journal_cnode *hnext;   /* next in hash list */
 134 };
 135
 136 struct reiserfs_bitmap_node {
 137         int id;
 138         char *data;
 139         struct list_head list;
 140 };
 141
 142 struct reiserfs_list_bitmap {
 143         struct reiserfs_journal_list *journal_list;
 144         struct reiserfs_bitmap_node **bitmaps;
 145 };
 146
 147 /*
 148 ** one of these for each transaction.  The most important part here is the j_realblock.
 149 ** this list of cnodes is used to hash all the blocks in all the commits, to mark all the
 150 ** real buffer heads dirty once all the commits hit the disk,
 151 ** and to make sure every real block in a transaction is on disk before allowing the log area
 152 ** to be overwritten */
 153 struct reiserfs_journal_list {
 154         unsigned long j_start;
 155         unsigned long j_state;
 156         unsigned long j_len;
 157         atomic_t j_nonzerolen;
 158         atomic_t j_commit_left;
 159         atomic_t j_older_commits_done;  /* all commits older than this on disk */
 160         struct mutex j_commit_mutex;
 161         unsigned int j_trans_id;
 162         time_t j_timestamp;
 163         struct reiserfs_list_bitmap *j_list_bitmap;
 164         struct buffer_head *j_commit_bh;        /* commit buffer head */
 165         struct reiserfs_journal_cnode *j_realblock;
 166         struct reiserfs_journal_cnode *j_freedlist;     /* list of buffers that were freed during this trans.  free each of these on flush */
 167         /* time ordered list of all active transactions */
 168         struct list_head j_list;
 169
 170         /* time ordered list of all transactions we haven't tried to flush yet */
 171         struct list_head j_working_list;
 172
 173         /* list of tail conversion targets in need of flush before commit */
 174         struct list_head j_tail_bh_list;
 175         /* list of data=ordered buffers in need of flush before commit */
 176         struct list_head j_bh_list;
 177         int j_refcount;
 178 };
 179
 180 struct reiserfs_journal {
 181         struct buffer_head **j_ap_blocks;       /* journal blocks on disk */
 182         struct reiserfs_journal_cnode *j_last;  /* newest journal block */
 183         struct reiserfs_journal_cnode *j_first; /*  oldest journal block.  start here for traverse */
 184
 185         struct block_device *j_dev_bd;
 186         fmode_t j_dev_mode;
 187         int j_1st_reserved_block;       /* first block on s_dev of reserved area journal */
 188
 189         unsigned long j_state;
 190         unsigned int j_trans_id;
 191         unsigned long j_mount_id;
 192         unsigned long j_start;  /* start of current waiting commit (index into j_ap_blocks) */
 193         unsigned long j_len;    /* length of current waiting commit */
 194         unsigned long j_len_alloc;      /* number of buffers requested by journal_begin() */
 195         atomic_t j_wcount;      /* count of writers for current commit */
 196         unsigned long j_bcount; /* batch count. allows turning X transactions into 1 */
 197         unsigned long j_first_unflushed_offset; /* first unflushed transactions offset */
 198         unsigned j_last_flush_trans_id; /* last fully flushed journal timestamp */
 199         struct buffer_head *j_header_bh;
 200
 201         time_t j_trans_start_time;      /* time this transaction started */
 202         struct mutex j_mutex;
 203         struct mutex j_flush_mutex;
 204         wait_queue_head_t j_join_wait;  /* wait for current transaction to finish before starting new one */
 205         atomic_t j_jlock;       /* lock for j_join_wait */
 206         int j_list_bitmap_index;        /* number of next list bitmap to use */
 207         int j_must_wait;        /* no more journal begins allowed. MUST sleep on j_join_wait */
 208         int j_next_full_flush;  /* next journal_end will flush all journal list */
 209         int j_next_async_flush; /* next journal_end will flush all async commits */
 210
 211         int j_cnode_used;       /* number of cnodes on the used list */
 212         int j_cnode_free;       /* number of cnodes on the free list */
 213
 214         unsigned int j_trans_max;       /* max number of blocks in a transaction.  */
 215         unsigned int j_max_batch;       /* max number of blocks to batch into a trans */
 216         unsigned int j_max_commit_age;  /* in seconds, how old can an async commit be */
 217         unsigned int j_max_trans_age;   /* in seconds, how old can a transaction be */
 218         unsigned int j_default_max_commit_age;  /* the default for the max commit age */
 219
 220         struct reiserfs_journal_cnode *j_cnode_free_list;
 221         struct reiserfs_journal_cnode *j_cnode_free_orig;       /* orig pointer returned from vmalloc */
 222
 223         struct reiserfs_journal_list *j_current_jl;
 224         int j_free_bitmap_nodes;
 225         int j_used_bitmap_nodes;
 226
 227         int j_num_lists;        /* total number of active transactions */
 228         int j_num_work_lists;   /* number that need attention from kreiserfsd */
 229
 230         /* debugging to make sure things are flushed in order */
 231         unsigned int j_last_flush_id;
 232
 233         /* debugging to make sure things are committed in order */
 234         unsigned int j_last_commit_id;
 235
 236         struct list_head j_bitmap_nodes;
 237         struct list_head j_dirty_buffers;
 238         spinlock_t j_dirty_buffers_lock;        /* protects j_dirty_buffers */
 239
 240         /* list of all active transactions */
 241         struct list_head j_journal_list;
 242         /* lists that haven't been touched by writeback attempts */
 243         struct list_head j_working_list;
 244
 245         struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS]; /* array of bitmaps to record the deleted blocks */
 246         struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE]; /* hash table for real buffer heads in current trans */
 247         struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE];    /* hash table for all the real buffer heads in all
 248                                                                                    the transactions */
 249         struct list_head j_prealloc_list;       /* list of inodes which have preallocated blocks */
 250         int j_persistent_trans;
 251         unsigned long j_max_trans_size;
 252         unsigned long j_max_batch_size;
 253
 254         int j_errno;
 255
 256         /* when flushing ordered buffers, throttle new ordered writers */
 257         struct delayed_work j_work;
 258         struct super_block *j_work_sb;
 259         atomic_t j_async_throttle;
 260 };
 261
 262 enum journal_state_bits {
 263         J_WRITERS_BLOCKED = 1,  /* set when new writers not allowed */
 264         J_WRITERS_QUEUED,       /* set when log is full due to too many writers */
 265         J_ABORTED,              /* set when log is aborted */
 266 };
 267
 268 #define JOURNAL_DESC_MAGIC "ReIsErLB"   /* ick.  magic string to find desc blocks in the journal */
 269
 270 typedef __u32(*hashf_t) (const signed char *, int);
 271
 272 struct reiserfs_bitmap_info {
 273         __u32 free_count;
 274 };
 275
 276 struct proc_dir_entry;
 277
 278 #if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO )
 279 typedef unsigned long int stat_cnt_t;
 280 typedef struct reiserfs_proc_info_data {
 281         spinlock_t lock;
 282         int exiting;
 283         int max_hash_collisions;
 284
 285         stat_cnt_t breads;
 286         stat_cnt_t bread_miss;
 287         stat_cnt_t search_by_key;
 288         stat_cnt_t search_by_key_fs_changed;
 289         stat_cnt_t search_by_key_restarted;
 290
 291         stat_cnt_t insert_item_restarted;
 292         stat_cnt_t paste_into_item_restarted;
 293         stat_cnt_t cut_from_item_restarted;
 294         stat_cnt_t delete_solid_item_restarted;
 295         stat_cnt_t delete_item_restarted;
 296
 297         stat_cnt_t leaked_oid;
 298         stat_cnt_t leaves_removable;
 299
 300         /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */
 301         stat_cnt_t balance_at[5];       /* XXX */
 302         /* sbk == search_by_key */
 303         stat_cnt_t sbk_read_at[5];      /* XXX */
 304         stat_cnt_t sbk_fs_changed[5];
 305         stat_cnt_t sbk_restarted[5];
 306         stat_cnt_t items_at[5]; /* XXX */
 307         stat_cnt_t free_at[5];  /* XXX */
 308         stat_cnt_t can_node_be_removed[5];      /* XXX */
 309         long int lnum[5];       /* XXX */
 310         long int rnum[5];       /* XXX */
 311         long int lbytes[5];     /* XXX */
 312         long int rbytes[5];     /* XXX */
 313         stat_cnt_t get_neighbors[5];
 314         stat_cnt_t get_neighbors_restart[5];
 315         stat_cnt_t need_l_neighbor[5];
 316         stat_cnt_t need_r_neighbor[5];
 317
 318         stat_cnt_t free_block;
 319         struct __scan_bitmap_stats {
 320                 stat_cnt_t call;
 321                 stat_cnt_t wait;
 322                 stat_cnt_t bmap;
 323                 stat_cnt_t retry;
 324                 stat_cnt_t in_journal_hint;
 325                 stat_cnt_t in_journal_nohint;
 326                 stat_cnt_t stolen;
 327         } scan_bitmap;
 328         struct __journal_stats {
 329                 stat_cnt_t in_journal;
 330                 stat_cnt_t in_journal_bitmap;
 331                 stat_cnt_t in_journal_reusable;
 332                 stat_cnt_t lock_journal;
 333                 stat_cnt_t lock_journal_wait;
 334                 stat_cnt_t journal_being;
 335                 stat_cnt_t journal_relock_writers;
 336                 stat_cnt_t journal_relock_wcount;
 337                 stat_cnt_t mark_dirty;
 338                 stat_cnt_t mark_dirty_already;
 339                 stat_cnt_t mark_dirty_notjournal;
 340                 stat_cnt_t restore_prepared;
 341                 stat_cnt_t prepare;
 342                 stat_cnt_t prepare_retry;
 343         } journal;
 344 } reiserfs_proc_info_data_t;
 345 #else
 346 typedef struct reiserfs_proc_info_data {
 347 } reiserfs_proc_info_data_t;
 348 #endif
 349
 350 /* reiserfs union of in-core super block data */
 351 struct reiserfs_sb_info {
 352         struct buffer_head *s_sbh;      /* Buffer containing the super block */
 353         /* both the comment and the choice of
 354            name are unclear for s_rs -Hans */
 355         struct reiserfs_super_block *s_rs;      /* Pointer to the super block in the buffer */
 356         struct reiserfs_bitmap_info *s_ap_bitmap;
 357         struct reiserfs_journal *s_journal;     /* pointer to journal information */
 358         unsigned short s_mount_state;   /* reiserfs state (valid, invalid) */
 359
 360         /* Serialize writers access, replace the old bkl */
 361         struct mutex lock;
 362         /* Owner of the lock (can be recursive) */
 363         struct task_struct *lock_owner;
 364         /* Depth of the lock, start from -1 like the bkl */
 365         int lock_depth;
 366
 367         /* Comment? -Hans */
 368         void (*end_io_handler) (struct buffer_head *, int);
 369         hashf_t s_hash_function;        /* pointer to function which is used
 370                                            to sort names in directory. Set on
 371                                            mount */
 372         unsigned long s_mount_opt;      /* reiserfs's mount options are set
 373                                            here (currently - NOTAIL, NOLOG,
 374                                            REPLAYONLY) */
 375
 376         struct {                /* This is a structure that describes block allocator options */
 377                 unsigned long bits;     /* Bitfield for enable/disable kind of options */
 378                 unsigned long large_file_size;  /* size started from which we consider file to be a large one(in blocks) */
 379                 int border;     /* percentage of disk, border takes */
 380                 int preallocmin;        /* Minimal file size (in blocks) starting from which we do preallocations */
 381                 int preallocsize;       /* Number of blocks we try to prealloc when file
 382                                            reaches preallocmin size (in blocks) or
 383                                            prealloc_list is empty. */
 384         } s_alloc_options;
 385
 386         /* Comment? -Hans */
 387         wait_queue_head_t s_wait;
 388         /* To be obsoleted soon by per buffer seals.. -Hans */
 389         atomic_t s_generation_counter;  // increased by one every time the
 390         // tree gets re-balanced
 391         unsigned long s_properties;     /* File system properties. Currently holds
 392                                            on-disk FS format */
 393
 394         /* session statistics */
 395         int s_disk_reads;
 396         int s_disk_writes;
 397         int s_fix_nodes;
 398         int s_do_balance;
 399         int s_unneeded_left_neighbor;
 400         int s_good_search_by_key_reada;
 401         int s_bmaps;
 402         int s_bmaps_without_search;
 403         int s_direct2indirect;
 404         int s_indirect2direct;
 405         /* set up when it's ok for reiserfs_read_inode2() to read from
 406            disk inode with nlink==0. Currently this is only used during
 407            finish_unfinished() processing at mount time */
 408         int s_is_unlinked_ok;
 409         reiserfs_proc_info_data_t s_proc_info_data;
 410         struct proc_dir_entry *procdir;
 411         int reserved_blocks;    /* amount of blocks reserved for further allocations */
 412         spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */
 413         struct dentry *priv_root;       /* root of /.reiserfs_priv */
 414         struct dentry *xattr_root;      /* root of /.reiserfs_priv/xattrs */
 415         int j_errno;
 416 #ifdef CONFIG_QUOTA
 417         char *s_qf_names[MAXQUOTAS];
 418         int s_jquota_fmt;
 419 #endif
 420         char *s_jdev;           /* Stored jdev for mount option showing */
 421 #ifdef CONFIG_REISERFS_CHECK
 422
 423         struct tree_balance *cur_tb;    /*
 424                                          * Detects whether more than one
 425                                          * copy of tb exists per superblock
 426                                          * as a means of checking whether
 427                                          * do_balance is executing concurrently
 428                                          * against another tree reader/writer
 429                                          * on a same mount point.
 430                                          */
 431 #endif
 432 };
 433
 434 /* Definitions of reiserfs on-disk properties: */
 435 #define REISERFS_3_5 0
 436 #define REISERFS_3_6 1
 437 #define REISERFS_OLD_FORMAT 2
 438
 439 enum reiserfs_mount_options {
 440 /* Mount options */
 441         REISERFS_LARGETAIL,     /* large tails will be created in a session */
 442         REISERFS_SMALLTAIL,     /* small (for files less than block size) tails will be created in a session */
 443         REPLAYONLY,             /* replay journal and return 0. Use by fsck */
 444         REISERFS_CONVERT,       /* -o conv: causes conversion of old
 445                                    format super block to the new
 446                                    format. If not specified - old
 447                                    partition will be dealt with in a
 448                                    manner of 3.5.x */
 449
 450 /* -o hash={tea, rupasov, r5, detect} is meant for properly mounting
 451 ** reiserfs disks from 3.5.19 or earlier.  99% of the time, this option
 452 ** is not required.  If the normal autodection code can't determine which
 453 ** hash to use (because both hashes had the same value for a file)
 454 ** use this option to force a specific hash.  It won't allow you to override
 455 ** the existing hash on the FS, so if you have a tea hash disk, and mount
 456 ** with -o hash=rupasov, the mount will fail.
 457 */
 458         FORCE_TEA_HASH,         /* try to force tea hash on mount */
 459         FORCE_RUPASOV_HASH,     /* try to force rupasov hash on mount */
 460         FORCE_R5_HASH,          /* try to force rupasov hash on mount */
 461         FORCE_HASH_DETECT,      /* try to detect hash function on mount */
 462
 463         REISERFS_DATA_LOG,
 464         REISERFS_DATA_ORDERED,
 465         REISERFS_DATA_WRITEBACK,
 466
 467 /* used for testing experimental features, makes benchmarking new
 468    features with and without more convenient, should never be used by
 469    users in any code shipped to users (ideally) */
 470
 471         REISERFS_NO_BORDER,
 472         REISERFS_NO_UNHASHED_RELOCATION,
 473         REISERFS_HASHED_RELOCATION,
 474         REISERFS_ATTRS,
 475         REISERFS_XATTRS_USER,
 476         REISERFS_POSIXACL,
 477         REISERFS_EXPOSE_PRIVROOT,
 478         REISERFS_BARRIER_NONE,
 479         REISERFS_BARRIER_FLUSH,
 480
 481         /* Actions on error */
 482         REISERFS_ERROR_PANIC,
 483         REISERFS_ERROR_RO,
 484         REISERFS_ERROR_CONTINUE,
 485
 486         REISERFS_USRQUOTA,      /* User quota option specified */
 487         REISERFS_GRPQUOTA,      /* Group quota option specified */
 488
 489         REISERFS_TEST1,
 490         REISERFS_TEST2,
 491         REISERFS_TEST3,
 492         REISERFS_TEST4,
 493         REISERFS_UNSUPPORTED_OPT,
 494 };
 495
 496 #define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH))
 497 #define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH))
 498 #define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH))
 499 #define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT))
 500 #define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER))
 501 #define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION))
 502 #define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION))
 503 #define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4))
 504
 505 #define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL))
 506 #define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL))
 507 #define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY))
 508 #define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS))
 509 #define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5))
 510 #define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT))
 511 #define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG))
 512 #define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED))
 513 #define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK))
 514 #define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER))
 515 #define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL))
 516 #define reiserfs_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT))
 517 #define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s))
 518 #define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE))
 519 #define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH))
 520
 521 #define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC))
 522 #define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO))
 523
 524 void reiserfs_file_buffer(struct buffer_head *bh, int list);
 525 extern struct file_system_type reiserfs_fs_type;
 526 int reiserfs_resize(struct super_block *, unsigned long);
 527
 528 #define CARRY_ON                0
 529 #define SCHEDULE_OCCURRED       1
 530
 531 #define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh)
 532 #define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal)
 533 #define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block)
 534 #define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free)
 535 #define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap)
 536
 537 #define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)
 538
 539 /* A safe version of the "bdevname", which returns the "s_id" field of
 540  * a superblock or else "Null superblock" if the super block is NULL.
 541  */
 542 static inline char *reiserfs_bdevname(struct super_block *s)
 543 {
 544         return (s == NULL) ? "Null superblock" : s->s_id;
 545 }
 546
 547 #define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
 548 static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
 549                                                 *journal)
 550 {
 551         return test_bit(J_ABORTED, &journal->j_state);
 552 }
 553
 554 #endif                          /* _LINUX_REISER_FS_SB */