blob: fc4a983e3c8936eb84a639a4dd6a9ec8ef74087f [file] [log] [blame]
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 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);
const char *lo_name;
};
struct gfs2_log_element {
struct list_head le_list;
const 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 mutex 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,
BH_Escaped = BH_PrivateStart + 1,
};
BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
BUFFER_FNS(Escaped, escaped)
TAS_BUFFER_FNS(Escaped, escaped)
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_ABORTED = 9,
};
struct gfs2_holder {
struct list_head gh_list;
struct gfs2_glock *gh_gl;
struct task_struct *gh_owner;
unsigned int gh_state;
unsigned gh_flags;
int gh_error;
unsigned long gh_iflags;
struct completion gh_wait;
unsigned long gh_ip;
};
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_holder i_gh; /* for prepare/commit_write only */
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 mutex f_fl_mutex;
struct gfs2_holder f_fl_gh;
};
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_lvb {
uint32_t qb_magic;
uint32_t __pad;
uint64_t qb_limit; /* Hard limit of # blocks to alloc */
uint64_t qb_warn; /* Warn user when alloc is above this # */
int64_t qb_value; /* Current # blocks allocated */
};
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 {
unsigned long tr_ip;
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 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 mutex sd_invalidate_inodes_mutex;
/* Inode Stuff */
struct inode *sd_master_dir;
struct inode *sd_jindex;
struct inode *sd_inum_inode;
struct inode *sd_statfs_inode;
struct inode *sd_ir_inode;
struct inode *sd_sc_inode;
struct inode *sd_ut_inode;
struct inode *sd_qc_inode;
struct inode *sd_rindex;
struct inode *sd_quota_inode;
/* Inum stuff */
struct mutex sd_inum_mutex;
/* StatFS stuff */
spinlock_t sd_statfs_spin;
struct mutex 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 mutex 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 mutex 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 mutex 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 mutex 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;
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;
unsigned int sd_log_num_jdata;
unsigned int sd_log_num_hdrs;
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 mutex sd_log_reserve_mutex;
uint64_t sd_log_sequence;
unsigned int sd_log_head;
unsigned int sd_log_tail;
int sd_log_idle;
unsigned long sd_log_flush_time;
struct rw_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 mutex 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_reclaimed;
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__ */