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/* Copyright 1996-2000 Hans Reiser, see reiserfs/README for licensing

 * and copyright details */

#ifndef _LINUX_REISER_FS_SB

#define _LINUX_REISER_FS_SB

#ifdef __KERNEL__

#include <linux/workqueue.h>

#endif

typedef enum {

  reiserfs_attrs_cleared        = 0x00000001,

} reiserfs_super_block_flags;

/* struct reiserfs_super_block accessors/mutators

 * since this is a disk structure, it will always be in

 * little endian format. */

#define sb_block_count(sbp)         (le32_to_cpu((sbp)->s_v1.s_block_count))

#define set_sb_block_count(sbp,v)   ((sbp)->s_v1.s_block_count = cpu_to_le32(v))

#define sb_free_blocks(sbp)         (le32_to_cpu((sbp)->s_v1.s_free_blocks))

#define set_sb_free_blocks(sbp,v)   ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v))

#define sb_root_block(sbp)          (le32_to_cpu((sbp)->s_v1.s_root_block))

#define set_sb_root_block(sbp,v)    ((sbp)->s_v1.s_root_block = cpu_to_le32(v))

#define sb_jp_journal_1st_block(sbp)  \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block))

#define set_sb_jp_journal_1st_block(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v))

#define sb_jp_journal_dev(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev))

#define set_sb_jp_journal_dev(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v))

#define sb_jp_journal_size(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size))

#define set_sb_jp_journal_size(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v))

#define sb_jp_journal_trans_max(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max))

#define set_sb_jp_journal_trans_max(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v))

#define sb_jp_journal_magic(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic))

#define set_sb_jp_journal_magic(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v))

#define sb_jp_journal_max_batch(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch))

#define set_sb_jp_journal_max_batch(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v))

#define sb_jp_jourmal_max_commit_age(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age))

#define set_sb_jp_journal_max_commit_age(sbp,v) \

              ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v))

#define sb_blocksize(sbp)          (le16_to_cpu((sbp)->s_v1.s_blocksize))

#define set_sb_blocksize(sbp,v)    ((sbp)->s_v1.s_blocksize = cpu_to_le16(v))

#define sb_oid_maxsize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_maxsize))

#define set_sb_oid_maxsize(sbp,v)  ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v))

#define sb_oid_cursize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_cursize))

#define set_sb_oid_cursize(sbp,v)  ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v))

#define sb_umount_state(sbp)       (le16_to_cpu((sbp)->s_v1.s_umount_state))

#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v))

#define sb_fs_state(sbp)           (le16_to_cpu((sbp)->s_v1.s_fs_state))

#define set_sb_fs_state(sbp,v)     ((sbp)->s_v1.s_fs_state = cpu_to_le16(v)) 

#define sb_hash_function_code(sbp) \

              (le32_to_cpu((sbp)->s_v1.s_hash_function_code))

#define set_sb_hash_function_code(sbp,v) \

              ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v))

#define sb_tree_height(sbp)        (le16_to_cpu((sbp)->s_v1.s_tree_height))

#define set_sb_tree_height(sbp,v)  ((sbp)->s_v1.s_tree_height = cpu_to_le16(v))

#define sb_bmap_nr(sbp)            (le16_to_cpu((sbp)->s_v1.s_bmap_nr))

#define set_sb_bmap_nr(sbp,v)      ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v))

#define sb_version(sbp)            (le16_to_cpu((sbp)->s_v1.s_version))

#define set_sb_version(sbp,v)      ((sbp)->s_v1.s_version = cpu_to_le16(v))

#define sb_reserved_for_journal(sbp) \

              (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal))

#define set_sb_reserved_for_journal(sbp,v) \

              ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v))

/* LOGGING -- */

/* These all interelate for performance.  

**

** If the journal block count is smaller than n transactions, you lose speed.

** I don't know what n is yet, I'm guessing 8-16.

**

** typical transaction size depends on the application, how often fsync is

** called, and how many metadata blocks you dirty in a 30 second period.  

** The more small files (<16k) you use, the larger your transactions will

** be.

**

** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal

** to wrap, which slows things down.  If you need high speed meta data updates, the journal should be big enough

** to prevent wrapping before dirty meta blocks get to disk.

**

** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal

** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.

**

** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.

**

*/

/* don't mess with these for a while */

                                /* we have a node size define somewhere in reiserfs_fs.h. -Hans */

#define JOURNAL_BLOCK_SIZE  4096 /* BUG gotta get rid of this */

#define JOURNAL_MAX_CNODE   1500 /* max cnodes to allocate. */

#define JOURNAL_HASH_SIZE 8192   

#define JOURNAL_NUM_BITMAPS 5 /* number of copies of the bitmaps to have floating.  Must be >= 2 */

#define JOURNAL_LIST_COUNT 64

/* these are bh_state bit flag offset numbers, for use in the buffer head */

#define BH_JDirty       16      /* journal data needs to be written before buffer can be marked dirty */

#define BH_JDirty_wait 18       /* commit is done, buffer marked dirty */

#define BH_JNew 19              /* buffer allocated during this transaction, no need to write if freed during this trans too */

/* ugly.  metadata blocks must be prepared before they can be logged.  

** prepared means unlocked and cleaned.  If the block is prepared, but not

** logged for some reason, any bits cleared while preparing it must be

** set again.

*/

#define BH_JPrepared 20         /* block has been prepared for the log */

#define BH_JRestore_dirty 22    /* restore the dirty bit later */

/* One of these for every block in every transaction

** Each one is in two hash tables.  First, a hash of the current transaction, and after journal_end, a

** hash of all the in memory transactions.

** next and prev are used by the current transaction (journal_hash).

** hnext and hprev are used by journal_list_hash.  If a block is in more than one transaction, the journal_list_hash

** links it in multiple times.  This allows flush_journal_list to remove just the cnode belonging

** to a given transaction.

*/

struct reiserfs_journal_cnode {

  struct buffer_head *bh ;               /* real buffer head */

  struct super_block *sb ;               /* dev of real buffer head */

  __u32 blocknr ;                /* block number of real buffer head, == 0 when buffer on disk */

  long state ;

  struct reiserfs_journal_list *jlist ;  /* journal list this cnode lives in */

  struct reiserfs_journal_cnode *next ;  /* next in transaction list */

  struct reiserfs_journal_cnode *prev ;  /* prev in transaction list */

  struct reiserfs_journal_cnode *hprev ; /* prev in hash list */

  struct reiserfs_journal_cnode *hnext ; /* next in hash list */

};

struct reiserfs_bitmap_node {

  int id ;

  char *data ;

  struct list_head list ;

} ;

struct reiserfs_list_bitmap {

  struct reiserfs_journal_list *journal_list ;

  struct reiserfs_bitmap_node **bitmaps ;

} ;

/*

** transaction handle which is passed around for all journal calls

*/

struct reiserfs_transaction_handle {

                                /* ifdef it. -Hans */

  char *t_caller ;              /* debugging use */

  int t_blocks_logged ;         /* number of blocks this writer has logged */

  int t_blocks_allocated ;      /* number of blocks this writer allocated */

  unsigned long t_trans_id ;    /* sanity check, equals the current trans id */

  struct super_block *t_super ; /* super for this FS when journal_begin was

                                   called. saves calls to reiserfs_get_super */

  int displace_new_blocks:1;    /* if new block allocation occurres, that block

                                   should be displaced from others */

} ;

/*

** one of these for each transaction.  The most important part here is the j_realblock.

** this list of cnodes is used to hash all the blocks in all the commits, to mark all the

** real buffer heads dirty once all the commits hit the disk,

** and to make sure every real block in a transaction is on disk before allowing the log area

** to be overwritten */

struct reiserfs_journal_list {

  unsigned long j_start ;

  unsigned long j_len ;

  atomic_t j_nonzerolen ;

  atomic_t j_commit_left ;

  atomic_t j_flushing ;

  atomic_t j_commit_flushing ;

  atomic_t j_older_commits_done ;      /* all commits older than this on disk*/

  unsigned long j_trans_id ;

  time_t j_timestamp ;

  struct reiserfs_list_bitmap *j_list_bitmap ;

  struct buffer_head *j_commit_bh ; /* commit buffer head */

  struct reiserfs_journal_cnode *j_realblock  ;

  struct reiserfs_journal_cnode *j_freedlist ; /* list of buffers that were freed during this trans.  free each of these on flush */

  wait_queue_head_t j_commit_wait ; /* wait for all the commit blocks to be flushed */

  wait_queue_head_t j_flush_wait ; /* wait for all the real blocks to be flushed */

} ;

struct reiserfs_page_list  ; /* defined in reiserfs_fs.h */

struct reiserfs_journal {

  struct buffer_head ** j_ap_blocks ; /* journal blocks on disk */

  struct reiserfs_journal_cnode *j_last ; /* newest journal block */

  struct reiserfs_journal_cnode *j_first ; /*  oldest journal block.  start here for traverse */

  struct file         *j_dev_file;

  struct block_device *j_dev_bd;  

  int j_1st_reserved_block;     /* first block on s_dev of reserved area journal */        

  long j_state ;                       

  unsigned long j_trans_id ;

  unsigned long j_mount_id ;

  unsigned long j_start ;             /* start of current waiting commit (index into j_ap_blocks) */

  unsigned long j_len ;               /* lenght of current waiting commit */

  unsigned long j_len_alloc ;         /* number of buffers requested by journal_begin() */

  atomic_t j_wcount ;            /* count of writers for current commit */

  unsigned long j_bcount ;            /* batch count. allows turning X transactions into 1 */

  unsigned long j_first_unflushed_offset ;  /* first unflushed transactions offset */

  unsigned long j_last_flush_trans_id ;    /* last fully flushed journal timestamp */

  struct buffer_head *j_header_bh ;  

  /* j_flush_pages must be flushed before the current transaction can

  ** commit

  */

  struct reiserfs_page_list *j_flush_pages ;

  time_t j_trans_start_time ;         /* time this transaction started */

  wait_queue_head_t j_wait ;         /* wait  journal_end to finish I/O */

  atomic_t j_wlock ;                       /* lock for j_wait */

  wait_queue_head_t j_join_wait ;    /* wait for current transaction to finish before starting new one */

  atomic_t j_jlock ;                       /* lock for j_join_wait */

  int j_journal_list_index ;          /* journal list number of the current trans */

  int j_list_bitmap_index ;           /* number of next list bitmap to use */

  int j_must_wait ;                    /* no more journal begins allowed. MUST sleep on j_join_wait */

  int j_next_full_flush ;             /* next journal_end will flush all journal list */

  int j_next_async_flush ;             /* next journal_end will flush all async commits */

  int j_cnode_used ;          /* number of cnodes on the used list */

  int j_cnode_free ;          /* number of cnodes on the free list */

  unsigned int s_journal_trans_max ;           /* max number of blocks in a transaction.  */

  unsigned int s_journal_max_batch ;           /* max number of blocks to batch into a trans */

  unsigned int s_journal_max_commit_age ;      /* in seconds, how old can an async commit be */

  unsigned int s_journal_max_trans_age ;       /* in seconds, how old can a transaction be */  

  struct reiserfs_journal_cnode *j_cnode_free_list ;

  struct reiserfs_journal_cnode *j_cnode_free_orig ; /* orig pointer returned from vmalloc */

  int j_free_bitmap_nodes ;

  int j_used_bitmap_nodes ;

  struct list_head j_bitmap_nodes ;

  struct list_head j_dirty_buffers ;

  spinlock_t j_dirty_buffers_lock ; /* protects j_dirty_buffers */

  struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS] ;      /* array of bitmaps to record the deleted blocks */

  struct reiserfs_journal_list j_journal_list[JOURNAL_LIST_COUNT] ;         /* array of all the journal lists */

  struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE] ;          /* hash table for real buffer heads in current trans */

  struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE] ; /* hash table for all the real buffer heads in all

                                                                                the transactions */

  struct list_head j_prealloc_list;     /* list of inodes which have preallocated blocks */

  unsigned long j_max_trans_size ;

  unsigned long j_max_batch_size ;

};

#define JOURNAL_DESC_MAGIC "ReIsErLB" /* ick.  magic string to find desc blocks in the journal */

typedef __u32 (*hashf_t) (const signed char *, int);

struct reiserfs_bitmap_info

{

    // FIXME: Won't work with block sizes > 8K

    __u16  first_zero_hint;

    __u16  free_count;

    struct buffer_head *bh; /* the actual bitmap */

};

struct proc_dir_entry;

#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO )

typedef unsigned long int stat_cnt_t;

typedef struct reiserfs_proc_info_data

{

  spinlock_t lock;

  int exiting;

  int max_hash_collisions;

  stat_cnt_t breads;

  stat_cnt_t bread_miss;

  stat_cnt_t search_by_key;

  stat_cnt_t search_by_key_fs_changed;

  stat_cnt_t search_by_key_restarted;

  stat_cnt_t insert_item_restarted;

  stat_cnt_t paste_into_item_restarted;

  stat_cnt_t cut_from_item_restarted;

  stat_cnt_t delete_solid_item_restarted;

  stat_cnt_t delete_item_restarted;

  stat_cnt_t leaked_oid;

  stat_cnt_t leaves_removable;

  /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */

  stat_cnt_t balance_at[ 5 ]; /* XXX */

  /* sbk == search_by_key */

  stat_cnt_t sbk_read_at[ 5 ]; /* XXX */

  stat_cnt_t sbk_fs_changed[ 5 ];

  stat_cnt_t sbk_restarted[ 5 ];

  stat_cnt_t items_at[ 5 ]; /* XXX */

  stat_cnt_t free_at[ 5 ]; /* XXX */

  stat_cnt_t can_node_be_removed[ 5 ]; /* XXX */

  long int lnum[ 5 ]; /* XXX */

  long int rnum[ 5 ]; /* XXX */

  long int lbytes[ 5 ]; /* XXX */

  long int rbytes[ 5 ]; /* XXX */

  stat_cnt_t get_neighbors[ 5 ];

  stat_cnt_t get_neighbors_restart[ 5 ];

  stat_cnt_t need_l_neighbor[ 5 ];

  stat_cnt_t need_r_neighbor[ 5 ];

  stat_cnt_t free_block;

  struct __scan_bitmap_stats {

        stat_cnt_t call;

        stat_cnt_t wait;

        stat_cnt_t bmap;

        stat_cnt_t retry;

        stat_cnt_t in_journal_hint;

        stat_cnt_t in_journal_nohint;

        stat_cnt_t stolen;

  } scan_bitmap;

  struct __journal_stats {

        stat_cnt_t in_journal;

        stat_cnt_t in_journal_bitmap;

        stat_cnt_t in_journal_reusable;

        stat_cnt_t lock_journal;

        stat_cnt_t lock_journal_wait;

        stat_cnt_t journal_being;

        stat_cnt_t journal_relock_writers;

        stat_cnt_t journal_relock_wcount;

        stat_cnt_t mark_dirty;

        stat_cnt_t mark_dirty_already;

        stat_cnt_t mark_dirty_notjournal;

        stat_cnt_t restore_prepared;

        stat_cnt_t prepare;

        stat_cnt_t prepare_retry;

  } journal;

} reiserfs_proc_info_data_t;

#else

typedef struct reiserfs_proc_info_data

{} reiserfs_proc_info_data_t;

#endif

/* reiserfs union of in-core super block data */

struct reiserfs_sb_info

{

    struct buffer_head * s_sbh;                   /* Buffer containing the super block */

                                /* both the comment and the choice of

                                   name are unclear for s_rs -Hans */

    struct reiserfs_super_block * s_rs;           /* Pointer to the super block in the buffer */

    struct reiserfs_bitmap_info * s_ap_bitmap;

    struct reiserfs_journal *s_journal ;                /* pointer to journal information */

    unsigned short s_mount_state;                 /* reiserfs state (valid, invalid) */

                                /* Comment? -Hans */

    void (*end_io_handler)(struct buffer_head *, int);

    hashf_t s_hash_function;    /* pointer to function which is used

                                   to sort names in directory. Set on

                                   mount */

    unsigned long s_mount_opt;  /* reiserfs's mount options are set

                                   here (currently - NOTAIL, NOLOG,

                                   REPLAYONLY) */

    struct {                    /* This is a structure that describes block allocator options */

        unsigned long bits;     /* Bitfield for enable/disable kind of options */

        unsigned long large_file_size; /* size started from which we consider file to be a large one(in blocks) */

        int border;             /* percentage of disk, border takes */

        int preallocmin;        /* Minimal file size (in blocks) starting from which we do preallocations */

        int preallocsize;       /* Number of blocks we try to prealloc when file

                                   reaches preallocmin size (in blocks) or

                                   prealloc_list is empty. */

    } s_alloc_options;

                                /* Comment? -Hans */

    wait_queue_head_t s_wait;

                                /* To be obsoleted soon by per buffer seals.. -Hans */

    atomic_t s_generation_counter; // increased by one every time the

    // tree gets re-balanced

    unsigned long s_properties;    /* File system properties. Currently holds

                                     on-disk FS format */

    /* session statistics */

    int s_kmallocs;

    int s_disk_reads;

    int s_disk_writes;

    int s_fix_nodes;

    int s_do_balance;

    int s_unneeded_left_neighbor;

    int s_good_search_by_key_reada;

    int s_bmaps;

    int s_bmaps_without_search;

    int s_direct2indirect;

    int s_indirect2direct;

        /* set up when it's ok for reiserfs_read_inode2() to read from

           disk inode with nlink==0. Currently this is only used during

           finish_unfinished() processing at mount time */

    int s_is_unlinked_ok;

    reiserfs_proc_info_data_t s_proc_info_data;

    struct proc_dir_entry *procdir;

    int reserved_blocks; /* amount of blocks reserved for further allocations */

    spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */

};

/* Definitions of reiserfs on-disk properties: */

#define REISERFS_3_5 0

#define REISERFS_3_6 1

/* Mount options */

#define REISERFS_LARGETAIL 0  /* large tails will be created in a session */

#define REISERFS_SMALLTAIL 17  /* small (for files less than block size) tails will be created in a session */

#define REPLAYONLY 3 /* replay journal and return 0. Use by fsck */

#define REISERFS_NOLOG 4      /* -o nolog: turn journalling off */

#define REISERFS_CONVERT 5    /* -o conv: causes conversion of old

                                 format super block to the new

                                 format. If not specified - old

                                 partition will be dealt with in a

                                 manner of 3.5.x */

/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting

** reiserfs disks from 3.5.19 or earlier.  99% of the time, this option

** is not required.  If the normal autodection code can't determine which

** hash to use (because both hases had the same value for a file)

** use this option to force a specific hash.  It won't allow you to override

** the existing hash on the FS, so if you have a tea hash disk, and mount

** with -o hash=rupasov, the mount will fail.

*/

#define FORCE_TEA_HASH 6      /* try to force tea hash on mount */

#define FORCE_RUPASOV_HASH 7  /* try to force rupasov hash on mount */

#define FORCE_R5_HASH 8       /* try to force rupasov hash on mount */

#define FORCE_HASH_DETECT 9   /* try to detect hash function on mount */

/* used for testing experimental features, makes benchmarking new

   features with and without more convenient, should never be used by

   users in any code shipped to users (ideally) */

#define REISERFS_NO_BORDER 11

#define REISERFS_NO_UNHASHED_RELOCATION 12

#define REISERFS_HASHED_RELOCATION 13

#define REISERFS_ATTRS 15

#define REISERFS_TEST1 11

#define REISERFS_TEST2 12

#define REISERFS_TEST3 13

#define REISERFS_TEST4 14 

#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH))

#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH))

#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH))

#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT))

#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER))

#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION))

#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION))

#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4))

#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL))

#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL))

#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY))

#define reiserfs_dont_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NOLOG))

#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS))

#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5))

#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT))

void reiserfs_file_buffer (struct buffer_head * bh, int list);

extern struct file_system_type reiserfs_fs_type;

int journal_mark_dirty(struct reiserfs_transaction_handle *, struct super_block *, struct buffer_head *bh) ;

int flush_old_commits(struct super_block *s, int) ;

int show_reiserfs_locks(void) ;

int reiserfs_resize(struct super_block *, unsigned long) ;

#define CARRY_ON                0

#define SCHEDULE_OCCURRED       1

#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh)

#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal)

#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block)

#define SB_JOURNAL_LIST(s) (SB_JOURNAL(s)->j_journal_list)

#define SB_JOURNAL_LIST_INDEX(s) (SB_JOURNAL(s)->j_journal_list_index) 

#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free) 

#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap)

#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)

#define SB_JOURNAL_TRANS_MAX(s)      (SB_JOURNAL(s)->s_journal_trans_max)

#define SB_JOURNAL_MAX_BATCH(s)      (SB_JOURNAL(s)->s_journal_max_batch)

#define SB_JOURNAL_MAX_COMMIT_AGE(s) (SB_JOURNAL(s)->s_journal_max_commit_age)

#define SB_JOURNAL_MAX_TRANS_AGE(s)  (SB_JOURNAL(s)->s_journal_max_trans_age)

/* A safe version of the "bdevname", which returns the "s_id" field of

 * a superblock or else "Null superblock" if the super block is NULL.

 */

static inline char *reiserfs_bdevname(struct super_block *s)

{

        return (s == NULL) ? "Null superblock" : s -> s_id;

}

#endif  /* _LINUX_REISER_FS_SB */