/* 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>
#include <linux/rwsem.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 */

/* 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 ;
} ;

/*
** 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_state;
  unsigned long j_len ;
  atomic_t j_nonzerolen ;
  atomic_t j_commit_left ;
  atomic_t j_older_commits_done ;      /* all commits older than this on disk*/
  struct semaphore j_commit_lock;
  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 */
  /* time ordered list of all active transactions */
  struct list_head j_list;

  /* time ordered list of all transactions we haven't tried to flush yet */
  struct list_head j_working_list;

  /* list of tail conversion targets in need of flush before commit */
  struct list_head j_tail_bh_list;
  /* list of data=ordered buffers in need of flush before commit */
  struct list_head j_bh_list;
  int j_refcount;
} ;

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 ;   

  time_t j_trans_start_time ;         /* time this transaction started */
  struct semaphore j_lock;
  struct semaphore j_flush_sem;
  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_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 j_trans_max ;           /* max number of blocks in a transaction.  */
  unsigned int j_max_batch ;           /* max number of blocks to batch into a trans */
  unsigned int j_max_commit_age ;      /* in seconds, how old can an async commit be */
  unsigned int j_max_trans_age ;       /* in seconds, how old can a transaction be */
  unsigned int j_default_max_commit_age ; /* the default for the max commit age */

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

  struct reiserfs_journal_list *j_current_jl;
  int j_free_bitmap_nodes ;
  int j_used_bitmap_nodes ;

  int j_num_lists;      /* total number of active transactions */
  int j_num_work_lists; /* number that need attention from kreiserfsd */

  /* debugging to make sure things are flushed in order */
  int j_last_flush_id;

  /* debugging to make sure things are committed in order */
  int j_last_commit_id;

  struct list_head j_bitmap_nodes ;
  struct list_head j_dirty_buffers ;
  spinlock_t j_dirty_buffers_lock ; /* protects j_dirty_buffers */

  /* list of all active transactions */
  struct list_head j_journal_list;
  /* lists that haven't been touched by writeback attempts */
  struct list_head j_working_list;

  struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS] ;	/* array of bitmaps to record the deleted blocks */
  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 */
  int j_persistent_trans;
  unsigned long j_max_trans_size ;
  unsigned long j_max_batch_size ;

  int j_errno;

  /* when flushing ordered buffers, throttle new ordered writers */
  struct work_struct j_work;
  atomic_t j_async_throttle;
};

enum journal_state_bits {
    J_WRITERS_BLOCKED = 1,   /* set when new writers not allowed */
    J_WRITERS_QUEUED,        /* set when log is full due to too many writers */
    J_ABORTED,               /* set when log is aborted */
};


#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 */
    struct dentry *priv_root; /* root of /.reiserfs_priv */
    struct dentry *xattr_root; /* root of /.reiserfs_priv/.xa */
    struct rw_semaphore xattr_dir_sem;

    int j_errno;
#ifdef CONFIG_QUOTA
    char *s_qf_names[MAXQUOTAS];
    int s_jquota_fmt;
#endif
};

/* Definitions of reiserfs on-disk properties: */
#define REISERFS_3_5 0
#define REISERFS_3_6 1

enum reiserfs_mount_options {
/* Mount options */
    REISERFS_LARGETAIL,  /* large tails will be created in a session */
    REISERFS_SMALLTAIL,  /* small (for files less than block size) tails will be created in a session */
    REPLAYONLY, /* replay journal and return 0. Use by fsck */
    REISERFS_CONVERT,    /* -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.
*/
    FORCE_TEA_HASH,      /* try to force tea hash on mount */
    FORCE_RUPASOV_HASH,  /* try to force rupasov hash on mount */
    FORCE_R5_HASH,       /* try to force rupasov hash on mount */
    FORCE_HASH_DETECT,   /* try to detect hash function on mount */

    REISERFS_DATA_LOG,
    REISERFS_DATA_ORDERED,
    REISERFS_DATA_WRITEBACK,

/* 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) */

    REISERFS_NO_BORDER,
    REISERFS_NO_UNHASHED_RELOCATION,
    REISERFS_HASHED_RELOCATION,
    REISERFS_ATTRS,
    REISERFS_XATTRS,
    REISERFS_XATTRS_USER,
    REISERFS_POSIXACL,
    REISERFS_BARRIER_NONE,
    REISERFS_BARRIER_FLUSH,

    /* Actions on error */
    REISERFS_ERROR_PANIC,
    REISERFS_ERROR_RO,
    REISERFS_ERROR_CONTINUE,

    REISERFS_QUOTA,		/* Some quota option specified */

    REISERFS_TEST1,
    REISERFS_TEST2,
    REISERFS_TEST3,
    REISERFS_TEST4,
    REISERFS_UNSUPPORTED_OPT,
};

#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_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))
#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG))
#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED))
#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK))
#define reiserfs_xattrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS))
#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER))
#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL))
#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s))
#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE))
#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH))

#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC))
#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO))

void reiserfs_file_buffer (struct buffer_head * bh, int list);
extern struct file_system_type reiserfs_fs_type;
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_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->)

/* 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;
}

#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
static inline int __reiserfs_is_journal_aborted (struct reiserfs_journal *journal)
{
    return test_bit (J_ABORTED, &journal->j_state);
}

#endif	/* _LINUX_REISER_FS_SB */