/* 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_mnt_count(sbp)          (le16_to_cpu((sbp)->s_mnt_count))
#define set_sb_mnt_count(sbp, v)   ((sbp)->s_mnt_count = 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 */
        unsigned 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 mutex j_commit_mutex;
        unsigned int 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 block_device *j_dev_bd;
        fmode_t j_dev_mode;
        int j_1st_reserved_block;       /* first block on s_dev of reserved area journal */

        unsigned long j_state;
        unsigned int 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;    /* length 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 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 mutex j_mutex;
        struct mutex j_flush_mutex;
        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 */
        unsigned int j_last_flush_id;

        /* debugging to make sure things are committed in order */
        unsigned 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 delayed_work j_work;
        struct super_block *j_work_sb;
        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 {
        __u32 free_count;
};

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_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/xattrs */
        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
#define REISERFS_OLD_FORMAT 2

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 hashes 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_USER,
        REISERFS_POSIXACL,
        REISERFS_EXPOSE_PRIVROOT,
        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_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_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT))
#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 */