reiserfs_fs_sb.h

Axis 221 camera embedded programing interface

	// FIXME: Won't work with block sizes > 8K
	__u16 first_zero_hint;
	__u16 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/.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
#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,
	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 */