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kernel-fxtec-pro1x/fs/gfs2/incore.h
Steven Whitehouse 64fb4eb7d4 [GFS2] Remove gfs2_databuf in favour of gfs2_bufdata structure 
Removing the gfs2_databuf structure and using gfs2_bufdata instead
is a step towards allowing journaling of data without requiring the
metadata header on each journaled block. The idea is to merge the
code paths for ordered data with that of journaled data, with the
log operations in lops.c tacking account of the different types of
buffers as they are presented to it. Largely the code path for
metadata will be similar too, but obviously through a different set
of log operations.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-18 13:14:40 +00:00

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/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*/
#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__
#define DIO_FORCE 0x00000001
#define DIO_CLEAN 0x00000002
#define DIO_DIRTY 0x00000004
#define DIO_START 0x00000008
#define DIO_WAIT 0x00000010
#define DIO_METADATA 0x00000020
#define DIO_DATA 0x00000040
#define DIO_RELEASE 0x00000080
#define DIO_ALL 0x00000100
struct gfs2_log_operations;
struct gfs2_log_element;
struct gfs2_bitmap;
struct gfs2_rgrpd;
struct gfs2_bufdata;
struct gfs2_glock_operations;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_alloc;
struct gfs2_inode;
struct gfs2_file;
struct gfs2_revoke;
struct gfs2_revoke_replay;
struct gfs2_unlinked;
struct gfs2_quota_data;
struct gfs2_log_buf;
struct gfs2_trans;
struct gfs2_ail;
struct gfs2_jdesc;
struct gfs2_args;
struct gfs2_tune;
struct gfs2_gl_hash_bucket;
struct gfs2_sbd;
typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
/*
* Structure of operations that are associated with each
* type of element in the log.
*/
struct gfs2_log_operations {
void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
void (*lo_before_commit) (struct gfs2_sbd *sdp);
void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
void (*lo_before_scan) (struct gfs2_jdesc *jd,
struct gfs2_log_header *head, int pass);
int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
struct gfs2_log_descriptor *ld, __be64 *ptr,
int pass);
void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
char *lo_name;
};
struct gfs2_log_element {
struct list_head le_list;
struct gfs2_log_operations *le_ops;
};
struct gfs2_bitmap {
struct buffer_head *bi_bh;
char *bi_clone;
uint32_t bi_offset;
uint32_t bi_start;
uint32_t bi_len;
};
struct gfs2_rgrpd {
struct list_head rd_list; /* Link with superblock */
struct list_head rd_list_mru;
struct list_head rd_recent; /* Recently used rgrps */
struct gfs2_glock *rd_gl; /* Glock for this rgrp */
struct gfs2_rindex rd_ri;
struct gfs2_rgrp rd_rg;
uint64_t rd_rg_vn;
struct gfs2_bitmap *rd_bits;
unsigned int rd_bh_count;
struct semaphore rd_mutex;
uint32_t rd_free_clone;
struct gfs2_log_element rd_le;
uint32_t rd_last_alloc_data;
uint32_t rd_last_alloc_meta;
struct gfs2_sbd *rd_sbd;
};
enum gfs2_state_bits {
BH_Pinned = BH_PrivateStart,
};
BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
struct gfs2_bufdata {
struct buffer_head *bd_bh;
struct gfs2_glock *bd_gl;
struct list_head bd_list_tr;
struct gfs2_log_element bd_le;
struct gfs2_ail *bd_ail;
struct list_head bd_ail_st_list;
struct list_head bd_ail_gl_list;
};
struct gfs2_glock_operations {
void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
int flags);
void (*go_xmote_bh) (struct gfs2_glock * gl);
void (*go_drop_th) (struct gfs2_glock * gl);
void (*go_drop_bh) (struct gfs2_glock * gl);
void (*go_sync) (struct gfs2_glock * gl, int flags);
void (*go_inval) (struct gfs2_glock * gl, int flags);
int (*go_demote_ok) (struct gfs2_glock * gl);
int (*go_lock) (struct gfs2_holder * gh);
void (*go_unlock) (struct gfs2_holder * gh);
void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
void (*go_greedy) (struct gfs2_glock * gl);
int go_type;
};
enum {
/* Actions */
HIF_MUTEX = 0,
HIF_PROMOTE = 1,
HIF_DEMOTE = 2,
HIF_GREEDY = 3,
/* States */
HIF_ALLOCED = 4,
HIF_DEALLOC = 5,
HIF_HOLDER = 6,
HIF_FIRST = 7,
HIF_RECURSE = 8,
HIF_ABORTED = 9,
};
struct gfs2_holder {
struct list_head gh_list;
struct gfs2_glock *gh_gl;
struct task_struct *gh_owner;
unsigned int gh_state;
int gh_flags;
int gh_error;
unsigned long gh_iflags;
struct completion gh_wait;
};
enum {
GLF_PLUG = 0,
GLF_LOCK = 1,
GLF_STICKY = 2,
GLF_PREFETCH = 3,
GLF_SYNC = 4,
GLF_DIRTY = 5,
GLF_SKIP_WAITERS2 = 6,
GLF_GREEDY = 7,
};
struct gfs2_glock {
struct list_head gl_list;
unsigned long gl_flags; /* GLF_... */
struct lm_lockname gl_name;
struct kref gl_ref;
spinlock_t gl_spin;
unsigned int gl_state;
struct list_head gl_holders;
struct list_head gl_waiters1; /* HIF_MUTEX */
struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
struct list_head gl_waiters3; /* HIF_PROMOTE */
struct gfs2_glock_operations *gl_ops;
struct gfs2_holder *gl_req_gh;
gfs2_glop_bh_t gl_req_bh;
lm_lock_t *gl_lock;
char *gl_lvb;
atomic_t gl_lvb_count;
uint64_t gl_vn;
unsigned long gl_stamp;
void *gl_object;
struct gfs2_gl_hash_bucket *gl_bucket;
struct list_head gl_reclaim;
struct gfs2_sbd *gl_sbd;
struct inode *gl_aspace;
struct gfs2_log_element gl_le;
struct list_head gl_ail_list;
atomic_t gl_ail_count;
};
struct gfs2_alloc {
/* Quota stuff */
unsigned int al_qd_num;
struct gfs2_quota_data *al_qd[4];
struct gfs2_holder al_qd_ghs[4];
/* Filled in by the caller to gfs2_inplace_reserve() */
uint32_t al_requested;
/* Filled in by gfs2_inplace_reserve() */
char *al_file;
unsigned int al_line;
struct gfs2_holder al_ri_gh;
struct gfs2_holder al_rgd_gh;
struct gfs2_rgrpd *al_rgd;
/* Filled in by gfs2_alloc_*() */
uint32_t al_alloced;
};
enum {
GIF_MIN_INIT = 0,
GIF_QD_LOCKED = 1,
GIF_PAGED = 2,
GIF_SW_PAGED = 3,
};
struct gfs2_inode {
struct gfs2_inum i_num;
atomic_t i_count;
unsigned long i_flags; /* GIF_... */
uint64_t i_vn;
struct gfs2_dinode i_di;
struct gfs2_glock *i_gl;
struct gfs2_sbd *i_sbd;
struct inode *i_vnode;
struct gfs2_holder i_iopen_gh;
struct gfs2_alloc i_alloc;
uint64_t i_last_rg_alloc;
spinlock_t i_spin;
struct rw_semaphore i_rw_mutex;
unsigned int i_greedy;
unsigned long i_last_pfault;
struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
};
enum {
GFF_DID_DIRECT_ALLOC = 0,
};
struct gfs2_file {
unsigned long f_flags; /* GFF_... */
struct semaphore f_fl_mutex;
struct gfs2_holder f_fl_gh;
struct gfs2_inode *f_inode;
struct file *f_vfile;
};
struct gfs2_revoke {
struct gfs2_log_element rv_le;
uint64_t rv_blkno;
};
struct gfs2_revoke_replay {
struct list_head rr_list;
uint64_t rr_blkno;
unsigned int rr_where;
};
enum {
ULF_LOCKED = 0,
};
struct gfs2_unlinked {
struct list_head ul_list;
unsigned int ul_count;
struct gfs2_unlinked_tag ul_ut;
unsigned long ul_flags; /* ULF_... */
unsigned int ul_slot;
};
enum {
QDF_USER = 0,
QDF_CHANGE = 1,
QDF_LOCKED = 2,
};
struct gfs2_quota_data {
struct list_head qd_list;
unsigned int qd_count;
uint32_t qd_id;
unsigned long qd_flags; /* QDF_... */
int64_t qd_change;
int64_t qd_change_sync;
unsigned int qd_slot;
unsigned int qd_slot_count;
struct buffer_head *qd_bh;
struct gfs2_quota_change *qd_bh_qc;
unsigned int qd_bh_count;
struct gfs2_glock *qd_gl;
struct gfs2_quota_lvb qd_qb;
uint64_t qd_sync_gen;
unsigned long qd_last_warn;
unsigned long qd_last_touched;
};
struct gfs2_log_buf {
struct list_head lb_list;
struct buffer_head *lb_bh;
struct buffer_head *lb_real;
};
struct gfs2_trans {
char *tr_file;
unsigned int tr_line;
unsigned int tr_blocks;
unsigned int tr_revokes;
unsigned int tr_reserved;
struct gfs2_holder *tr_t_gh;
int tr_touched;
unsigned int tr_num_buf;
unsigned int tr_num_buf_new;
unsigned int tr_num_buf_rm;
struct list_head tr_list_buf;
unsigned int tr_num_revoke;
unsigned int tr_num_revoke_rm;
};
struct gfs2_ail {
struct list_head ai_list;
unsigned int ai_first;
struct list_head ai_ail1_list;
struct list_head ai_ail2_list;
uint64_t ai_sync_gen;
};
struct gfs2_jdesc {
struct list_head jd_list;
struct gfs2_inode *jd_inode;
unsigned int jd_jid;
int jd_dirty;
unsigned int jd_blocks;
};
#define GFS2_GLOCKD_DEFAULT 1
#define GFS2_GLOCKD_MAX 16
#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
#define GFS2_QUOTA_OFF 0
#define GFS2_QUOTA_ACCOUNT 1
#define GFS2_QUOTA_ON 2
#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
#define GFS2_DATA_WRITEBACK 1
#define GFS2_DATA_ORDERED 2
struct gfs2_args {
char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
int ar_spectator; /* Don't get a journal because we're always RO */
int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
int ar_localcaching; /* Local-style caching (dangerous on multihost) */
int ar_debug; /* Oops on errors instead of trying to be graceful */
int ar_upgrade; /* Upgrade ondisk/multihost format */
unsigned int ar_num_glockd; /* Number of glockd threads */
int ar_posix_acl; /* Enable posix acls */
int ar_quota; /* off/account/on */
int ar_suiddir; /* suiddir support */
int ar_data; /* ordered/writeback */
};
struct gfs2_tune {
spinlock_t gt_spin;
unsigned int gt_ilimit;
unsigned int gt_ilimit_tries;
unsigned int gt_ilimit_min;
unsigned int gt_demote_secs; /* Cache retention for unheld glock */
unsigned int gt_incore_log_blocks;
unsigned int gt_log_flush_secs;
unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
unsigned int gt_scand_secs;
unsigned int gt_recoverd_secs;
unsigned int gt_logd_secs;
unsigned int gt_quotad_secs;
unsigned int gt_inoded_secs;
unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
unsigned int gt_quota_scale_num; /* Numerator */
unsigned int gt_quota_scale_den; /* Denominator */
unsigned int gt_quota_cache_secs;
unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
unsigned int gt_atime_quantum; /* Min secs between atime updates */
unsigned int gt_new_files_jdata;
unsigned int gt_new_files_directio;
unsigned int gt_max_atomic_write; /* Split big writes into this size */
unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
unsigned int gt_lockdump_size;
unsigned int gt_stall_secs; /* Detects trouble! */
unsigned int gt_complain_secs;
unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
unsigned int gt_entries_per_readdir;
unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
unsigned int gt_greedy_default;
unsigned int gt_greedy_quantum;
unsigned int gt_greedy_max;
unsigned int gt_statfs_quantum;
unsigned int gt_statfs_slow;
};
struct gfs2_gl_hash_bucket {
rwlock_t hb_lock;
struct list_head hb_list;
};
enum {
SDF_JOURNAL_CHECKED = 0,
SDF_JOURNAL_LIVE = 1,
SDF_SHUTDOWN = 2,
SDF_NOATIME = 3,
};
#define GFS2_GL_HASH_SHIFT 13
#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
#define GFS2_FSNAME_LEN 256
struct gfs2_sbd {
struct super_block *sd_vfs;
struct kobject sd_kobj;
unsigned long sd_flags; /* SDF_... */
struct gfs2_sb sd_sb;
/* Constants computed on mount */
uint32_t sd_fsb2bb;
uint32_t sd_fsb2bb_shift;
uint32_t sd_diptrs; /* Number of pointers in a dinode */
uint32_t sd_inptrs; /* Number of pointers in a indirect block */
uint32_t sd_jbsize; /* Size of a journaled data block */
uint32_t sd_hash_bsize; /* sizeof(exhash block) */
uint32_t sd_hash_bsize_shift;
uint32_t sd_hash_ptrs; /* Number of pointers in a hash block */
uint32_t sd_ut_per_block;
uint32_t sd_qc_per_block;
uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
uint32_t sd_max_height; /* Max height of a file's metadata tree */
uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
struct gfs2_args sd_args; /* Mount arguments */
struct gfs2_tune sd_tune; /* Filesystem tuning structure */
/* Lock Stuff */
struct lm_lockstruct sd_lockstruct;
struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
struct list_head sd_reclaim_list;
spinlock_t sd_reclaim_lock;
wait_queue_head_t sd_reclaim_wq;
atomic_t sd_reclaim_count;
struct gfs2_holder sd_live_gh;
struct gfs2_glock *sd_rename_gl;
struct gfs2_glock *sd_trans_gl;
struct semaphore sd_invalidate_inodes_mutex;
/* Inode Stuff */
struct gfs2_inode *sd_master_dir;
struct gfs2_inode *sd_jindex;
struct gfs2_inode *sd_inum_inode;
struct gfs2_inode *sd_statfs_inode;
struct gfs2_inode *sd_ir_inode;
struct gfs2_inode *sd_sc_inode;
struct gfs2_inode *sd_ut_inode;
struct gfs2_inode *sd_qc_inode;
struct gfs2_inode *sd_rindex;
struct gfs2_inode *sd_quota_inode;
struct gfs2_inode *sd_root_dir;
/* Inum stuff */
struct semaphore sd_inum_mutex;
/* StatFS stuff */
spinlock_t sd_statfs_spin;
struct semaphore sd_statfs_mutex;
struct gfs2_statfs_change sd_statfs_master;
struct gfs2_statfs_change sd_statfs_local;
unsigned long sd_statfs_sync_time;
/* Resource group stuff */
uint64_t sd_rindex_vn;
spinlock_t sd_rindex_spin;
struct semaphore sd_rindex_mutex;
struct list_head sd_rindex_list;
struct list_head sd_rindex_mru_list;
struct list_head sd_rindex_recent_list;
struct gfs2_rgrpd *sd_rindex_forward;
unsigned int sd_rgrps;
/* Journal index stuff */
struct list_head sd_jindex_list;
spinlock_t sd_jindex_spin;
struct semaphore sd_jindex_mutex;
unsigned int sd_journals;
unsigned long sd_jindex_refresh_time;
struct gfs2_jdesc *sd_jdesc;
struct gfs2_holder sd_journal_gh;
struct gfs2_holder sd_jinode_gh;
struct gfs2_holder sd_ir_gh;
struct gfs2_holder sd_sc_gh;
struct gfs2_holder sd_ut_gh;
struct gfs2_holder sd_qc_gh;
/* Daemon stuff */
struct task_struct *sd_scand_process;
struct task_struct *sd_recoverd_process;
struct task_struct *sd_logd_process;
struct task_struct *sd_quotad_process;
struct task_struct *sd_inoded_process;
struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
unsigned int sd_glockd_num;
/* Unlinked inode stuff */
struct list_head sd_unlinked_list;
atomic_t sd_unlinked_count;
spinlock_t sd_unlinked_spin;
struct semaphore sd_unlinked_mutex;
unsigned int sd_unlinked_slots;
unsigned int sd_unlinked_chunks;
unsigned char **sd_unlinked_bitmap;
/* Quota stuff */
struct list_head sd_quota_list;
atomic_t sd_quota_count;
spinlock_t sd_quota_spin;
struct semaphore sd_quota_mutex;
unsigned int sd_quota_slots;
unsigned int sd_quota_chunks;
unsigned char **sd_quota_bitmap;
uint64_t sd_quota_sync_gen;
unsigned long sd_quota_sync_time;
/* Log stuff */
spinlock_t sd_log_lock;
atomic_t sd_log_trans_count;
wait_queue_head_t sd_log_trans_wq;
atomic_t sd_log_flush_count;
wait_queue_head_t sd_log_flush_wq;
unsigned int sd_log_blks_reserved;
unsigned int sd_log_commited_buf;
unsigned int sd_log_commited_revoke;
unsigned int sd_log_num_gl;
unsigned int sd_log_num_buf;
unsigned int sd_log_num_revoke;
unsigned int sd_log_num_rg;
unsigned int sd_log_num_databuf;
struct list_head sd_log_le_gl;
struct list_head sd_log_le_buf;
struct list_head sd_log_le_revoke;
struct list_head sd_log_le_rg;
struct list_head sd_log_le_databuf;
unsigned int sd_log_blks_free;
struct list_head sd_log_blks_list;
wait_queue_head_t sd_log_blks_wait;
uint64_t sd_log_sequence;
unsigned int sd_log_head;
unsigned int sd_log_tail;
uint64_t sd_log_wraps;
int sd_log_idle;
unsigned long sd_log_flush_time;
struct semaphore sd_log_flush_lock;
struct list_head sd_log_flush_list;
unsigned int sd_log_flush_head;
uint64_t sd_log_flush_wrapped;
struct list_head sd_ail1_list;
struct list_head sd_ail2_list;
uint64_t sd_ail_sync_gen;
/* Replay stuff */
struct list_head sd_revoke_list;
unsigned int sd_replay_tail;
unsigned int sd_found_blocks;
unsigned int sd_found_revokes;
unsigned int sd_replayed_blocks;
/* For quiescing the filesystem */
struct gfs2_holder sd_freeze_gh;
struct semaphore sd_freeze_lock;
unsigned int sd_freeze_count;
/* Counters */
atomic_t sd_glock_count;
atomic_t sd_glock_held_count;
atomic_t sd_inode_count;
atomic_t sd_bufdata_count;
atomic_t sd_fh2dentry_misses;
atomic_t sd_reclaimed;
atomic_t sd_log_flush_incore;
atomic_t sd_log_flush_ondisk;
atomic_t sd_glock_nq_calls;
atomic_t sd_glock_dq_calls;
atomic_t sd_glock_prefetch_calls;
atomic_t sd_lm_lock_calls;
atomic_t sd_lm_unlock_calls;
atomic_t sd_lm_callbacks;
atomic_t sd_ops_address;
atomic_t sd_ops_dentry;
atomic_t sd_ops_export;
atomic_t sd_ops_file;
atomic_t sd_ops_inode;
atomic_t sd_ops_super;
atomic_t sd_ops_vm;
char sd_fsname[GFS2_FSNAME_LEN];
char sd_table_name[GFS2_FSNAME_LEN];
char sd_proto_name[GFS2_FSNAME_LEN];
/* Debugging crud */
unsigned long sd_last_warning;
};
#endif /* __INCORE_DOT_H__ */
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