diff options
Diffstat (limited to 'fs/gfs2/incore.h')
| -rw-r--r-- | fs/gfs2/incore.h | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h new file mode 100644 index 000000000000..118dc693d111 --- /dev/null +++ b/fs/gfs2/incore.h @@ -0,0 +1,634 @@ +/* + * 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 version 2. + */ + +#ifndef __INCORE_DOT_H__ +#define __INCORE_DOT_H__ + +#include <linux/fs.h> + +#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_holder; +struct gfs2_glock; +struct gfs2_quota_data; +struct gfs2_trans; +struct gfs2_ail; +struct gfs2_jdesc; +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; + u32 bi_offset; + u32 bi_start; + u32 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; + u64 rd_rg_vn; + struct gfs2_bitmap *rd_bits; + unsigned int rd_bh_count; + struct mutex rd_mutex; + u32 rd_free_clone; + struct gfs2_log_element rd_le; + u32 rd_last_alloc_data; + u32 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); + const 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_LOCK = 1, + GLF_STICKY = 2, + GLF_PREFETCH = 3, + GLF_DIRTY = 5, + GLF_SKIP_WAITERS2 = 6, + GLF_GREEDY = 7, +}; + +struct gfs2_glock { + struct hlist_node gl_list; + unsigned long gl_flags; /* GLF_... */ + struct lm_lockname gl_name; + atomic_t gl_ref; + + spinlock_t gl_spin; + + unsigned int gl_state; + unsigned int gl_hash; + struct task_struct *gl_owner; + unsigned long gl_ip; + 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 */ + + const struct gfs2_glock_operations *gl_ops; + + struct gfs2_holder *gl_req_gh; + gfs2_glop_bh_t gl_req_bh; + + void *gl_lock; + char *gl_lvb; + atomic_t gl_lvb_count; + + u64 gl_vn; + unsigned long gl_stamp; + void *gl_object; + + 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 */ + + struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; + struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; + unsigned int al_qd_num; + + u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ + u32 al_alloced; /* Filled in by gfs2_alloc_*() */ + + /* Filled in by gfs2_inplace_reserve() */ + + unsigned int al_line; + char *al_file; + struct gfs2_holder al_ri_gh; + struct gfs2_holder al_rgd_gh; + struct gfs2_rgrpd *al_rgd; + +}; + +enum { + GIF_QD_LOCKED = 1, + GIF_PAGED = 2, + GIF_SW_PAGED = 3, +}; + +struct gfs2_inode { + struct inode i_inode; + struct gfs2_inum i_num; + + unsigned long i_flags; /* GIF_... */ + + u64 i_vn; + struct gfs2_dinode i_di; /* To be replaced by ref to block */ + + struct gfs2_glock *i_gl; /* Move into i_gh? */ + struct gfs2_holder i_iopen_gh; + struct gfs2_holder i_gh; /* for prepare/commit_write only */ + struct gfs2_alloc i_alloc; + u64 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]; +}; + +/* + * Since i_inode is the first element of struct gfs2_inode, + * this is effectively a cast. + */ +static inline struct gfs2_inode *GFS2_I(struct inode *inode) +{ + return container_of(inode, struct gfs2_inode, i_inode); +} + +/* To be removed? */ +static inline struct gfs2_sbd *GFS2_SB(struct inode *inode) +{ + return inode->i_sb->s_fs_info; +} + +enum { + GFF_DID_DIRECT_ALLOC = 0, + GFF_EXLOCK = 1, +}; + +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; + u64 rv_blkno; +}; + +struct gfs2_revoke_replay { + struct list_head rr_list; + u64 rr_blkno; + unsigned int rr_where; +}; + +enum { + QDF_USER = 0, + QDF_CHANGE = 1, + QDF_LOCKED = 2, +}; + +struct gfs2_quota_lvb { + __be32 qb_magic; + u32 __pad; + __be64 qb_limit; /* Hard limit of # blocks to alloc */ + __be64 qb_warn; /* Warn user when alloc is above this # */ + __be64 qb_value; /* Current # blocks allocated */ +}; + +struct gfs2_quota_data { + struct list_head qd_list; + unsigned int qd_count; + + u32 qd_id; + unsigned long qd_flags; /* QDF_... */ + + s64 qd_change; + s64 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; + + u64 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; + + u64 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_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; +}; + +enum { + SDF_JOURNAL_CHECKED = 0, + SDF_JOURNAL_LIVE = 1, + SDF_SHUTDOWN = 2, + SDF_NOATIME = 3, +}; + +#define GFS2_FSNAME_LEN 256 + +struct gfs2_sbd { + struct super_block *sd_vfs; + struct super_block *sd_vfs_meta; + struct kobject sd_kobj; + unsigned long sd_flags; /* SDF_... */ + struct gfs2_sb sd_sb; + + /* Constants computed on mount */ + + u32 sd_fsb2bb; + u32 sd_fsb2bb_shift; + u32 sd_diptrs; /* Number of pointers in a dinode */ + u32 sd_inptrs; /* Number of pointers in a indirect block */ + u32 sd_jbsize; /* Size of a journaled data block */ + u32 sd_hash_bsize; /* sizeof(exhash block) */ + u32 sd_hash_bsize_shift; + u32 sd_hash_ptrs; /* Number of pointers in a hash block */ + u32 sd_qc_per_block; + u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ + u32 sd_max_height; /* Max height of a file's metadata tree */ + u64 sd_heightsize[GFS2_MAX_META_HEIGHT]; + u32 sd_max_jheight; /* Max height of journaled file's meta tree */ + u64 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 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; + + /* 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_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 */ + + u64 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_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_glockd_process[GFS2_GLOCKD_MAX]; + unsigned int sd_glockd_num; + + /* 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; + + u64 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; + + u64 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; + u64 sd_log_flush_wrapped; + + struct list_head sd_ail1_list; + struct list_head sd_ail2_list; + u64 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; + struct vfsmount *sd_gfs2mnt; +}; + +#endif /* __INCORE_DOT_H__ */ + |