[PATCH 01/16] GFS2: Core header files
From: Steven Whitehouse
Date: Fri Apr 21 2006 - 12:00:25 EST
[PATCH 01/16] GFS2: Core header files
The header files for the core of GFS2.
Signed-off-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>
Signed-off-by: David Teigland <teigland@xxxxxxxxxx>
fs/gfs2/gfs2.h | 31 ++
fs/gfs2/incore.h | 680 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/gfs2_ondisk.h | 472 ++++++++++++++++++++++++++++++
3 files changed, 1183 insertions(+)
--- /dev/null
+++ b/fs/gfs2/gfs2.h
@@ -0,0 +1,31 @@
+/*
+ * 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 __GFS2_DOT_H__
+#define __GFS2_DOT_H__
+
+enum {
+ NO_CREATE = 0,
+ CREATE = 1,
+};
+
+enum {
+ NO_WAIT = 0,
+ WAIT = 1,
+};
+
+enum {
+ NO_FORCE = 0,
+ FORCE = 1,
+};
+
+#define GFS2_FAST_NAME_SIZE 8
+
+#endif /* __GFS2_DOT_H__ */
+
--- /dev/null
+++ b/fs/gfs2/incore.h
@@ -0,0 +1,680 @@
+/*
+ * 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);
+ 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_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;
+ 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__ */
+
--- /dev/null
+++ b/include/linux/gfs2_ondisk.h
@@ -0,0 +1,472 @@
+/*
+* 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 __GFS2_ONDISK_DOT_H__
+#define __GFS2_ONDISK_DOT_H__
+
+#define GFS2_MAGIC 0x01161970
+#define GFS2_BASIC_BLOCK 512
+#define GFS2_BASIC_BLOCK_SHIFT 9
+
+/* Lock numbers of the LM_TYPE_NONDISK type */
+
+#define GFS2_MOUNT_LOCK 0
+#define GFS2_LIVE_LOCK 1
+#define GFS2_TRANS_LOCK 2
+#define GFS2_RENAME_LOCK 3
+
+/* Format numbers for various metadata types */
+
+#define GFS2_FORMAT_NONE 0
+#define GFS2_FORMAT_SB 100
+#define GFS2_FORMAT_RG 200
+#define GFS2_FORMAT_RB 300
+#define GFS2_FORMAT_DI 400
+#define GFS2_FORMAT_IN 500
+#define GFS2_FORMAT_LF 600
+#define GFS2_FORMAT_JD 700
+#define GFS2_FORMAT_LH 800
+#define GFS2_FORMAT_LD 900
+#define GFS2_FORMAT_LB 1000
+#define GFS2_FORMAT_EA 1600
+#define GFS2_FORMAT_ED 1700
+#define GFS2_FORMAT_UT 1300
+#define GFS2_FORMAT_QC 1400
+/* These are format numbers for entities contained in files */
+#define GFS2_FORMAT_RI 1100
+#define GFS2_FORMAT_DE 1200
+#define GFS2_FORMAT_QU 1500
+/* These are part of the superblock */
+#define GFS2_FORMAT_FS 1801
+#define GFS2_FORMAT_MULTI 1900
+
+/*
+ * An on-disk inode number
+ */
+
+struct gfs2_inum {
+ __be64 no_formal_ino;
+ __be64 no_addr;
+};
+
+static inline int gfs2_inum_equal(const struct gfs2_inum *ino1,
+ const struct gfs2_inum *ino2)
+{
+ return ino1->no_formal_ino == ino2->no_formal_ino &&
+ ino1->no_addr == ino2->no_addr;
+}
+
+/*
+ * Generic metadata head structure
+ * Every inplace buffer logged in the journal must start with this.
+ */
+
+#define GFS2_METATYPE_NONE 0
+#define GFS2_METATYPE_SB 1
+#define GFS2_METATYPE_RG 2
+#define GFS2_METATYPE_RB 3
+#define GFS2_METATYPE_DI 4
+#define GFS2_METATYPE_IN 5
+#define GFS2_METATYPE_LF 6
+#define GFS2_METATYPE_JD 7
+#define GFS2_METATYPE_LH 8
+#define GFS2_METATYPE_LD 9
+#define GFS2_METATYPE_LB 12
+#define GFS2_METATYPE_EA 10
+#define GFS2_METATYPE_ED 11
+#define GFS2_METATYPE_UT 13
+#define GFS2_METATYPE_QC 14
+
+struct gfs2_meta_header {
+ __be32 mh_magic;
+ __be32 mh_type;
+ __be64 __pad0; /* Was generation number in gfs1 */
+ __be32 mh_format;
+ __be32 __pad1; /* Was incarnation number in gfs1 */
+};
+
+/*
+ * super-block structure
+ *
+ * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
+ *
+ * Order is important, need to be able to read old superblocks to do on-disk
+ * version upgrades.
+ */
+
+/* Address of superblock in GFS2 basic blocks */
+#define GFS2_SB_ADDR 128
+
+/* The lock number for the superblock (must be zero) */
+#define GFS2_SB_LOCK 0
+
+/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
+ Includes: the fencing zero at the end */
+#define GFS2_LOCKNAME_LEN 64
+
+struct gfs2_sb {
+ struct gfs2_meta_header sb_header;
+
+ __be32 sb_fs_format;
+ __be32 sb_multihost_format;
+ __u32 __pad0; /* Was superblock flags in gfs1 */
+
+ __be32 sb_bsize;
+ __be32 sb_bsize_shift;
+ __u32 __pad1; /* Was journal segment size in gfs1 */
+
+ struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
+ struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
+ struct gfs2_inum sb_root_dir;
+
+ char sb_lockproto[GFS2_LOCKNAME_LEN];
+ char sb_locktable[GFS2_LOCKNAME_LEN];
+ /* In gfs1, quota and license dinodes followed */
+};
+
+/*
+ * resource index structure
+ */
+
+struct gfs2_rindex {
+ __be64 ri_addr; /* grp block disk address */
+ __be32 ri_length; /* length of rgrp header in fs blocks */
+ __u32 __pad;
+
+ __be64 ri_data0; /* first data location */
+ __be32 ri_data; /* num of data blocks in rgrp */
+
+ __be32 ri_bitbytes; /* number of bytes in data bitmaps */
+
+ __u8 ri_reserved[64];
+};
+
+/*
+ * resource group header structure
+ */
+
+/* Number of blocks per byte in rgrp */
+#define GFS2_NBBY 4
+#define GFS2_BIT_SIZE 2
+#define GFS2_BIT_MASK 0x00000003
+
+#define GFS2_BLKST_FREE 0
+#define GFS2_BLKST_USED 1
+#define GFS2_BLKST_INVALID 2
+#define GFS2_BLKST_DINODE 3
+
+#define GFS2_RGF_JOURNAL 0x00000001
+#define GFS2_RGF_METAONLY 0x00000002
+#define GFS2_RGF_DATAONLY 0x00000004
+#define GFS2_RGF_NOALLOC 0x00000008
+
+struct gfs2_rgrp {
+ struct gfs2_meta_header rg_header;
+
+ __be32 rg_flags;
+ __be32 rg_free;
+ __be32 rg_dinodes;
+
+ __u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */
+};
+
+/*
+ * quota structure
+ */
+
+struct gfs2_quota {
+ __be64 qu_limit;
+ __be64 qu_warn;
+ __be64 qu_value;
+ __u8 qu_reserved[64];
+};
+
+/*
+ * dinode structure
+ */
+
+#define GFS2_MAX_META_HEIGHT 10
+#define GFS2_DIR_MAX_DEPTH 17
+
+#define DT2IF(dt) (((dt) << 12) & S_IFMT)
+#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
+
+enum {
+ gfs2fl_Jdata = 0,
+ gfs2fl_ExHash = 1,
+ gfs2fl_Unused = 2,
+ gfs2fl_EaIndirect = 3,
+ gfs2fl_Directio = 4,
+ gfs2fl_Immutable = 5,
+ gfs2fl_AppendOnly = 6,
+ gfs2fl_NoAtime = 7,
+ gfs2fl_Sync = 8,
+ gfs2fl_System = 9,
+ gfs2fl_TruncInProg = 29,
+ gfs2fl_InheritDirectio = 30,
+ gfs2fl_InheritJdata = 31,
+};
+
+/* Dinode flags */
+#define GFS2_DIF_JDATA 0x00000001
+#define GFS2_DIF_EXHASH 0x00000002
+#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
+#define GFS2_DIF_EA_INDIRECT 0x00000008
+#define GFS2_DIF_DIRECTIO 0x00000010
+#define GFS2_DIF_IMMUTABLE 0x00000020
+#define GFS2_DIF_APPENDONLY 0x00000040
+#define GFS2_DIF_NOATIME 0x00000080
+#define GFS2_DIF_SYNC 0x00000100
+#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
+#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
+#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
+#define GFS2_DIF_INHERIT_JDATA 0x80000000
+
+struct gfs2_dinode {
+ struct gfs2_meta_header di_header;
+
+ struct gfs2_inum di_num;
+
+ __be32 di_mode; /* mode of file */
+ __be32 di_uid; /* owner's user id */
+ __be32 di_gid; /* owner's group id */
+ __be32 di_nlink; /* number of links to this file */
+ __be64 di_size; /* number of bytes in file */
+ __be64 di_blocks; /* number of blocks in file */
+ __be64 di_atime; /* time last accessed */
+ __be64 di_mtime; /* time last modified */
+ __be64 di_ctime; /* time last changed */
+ __be32 di_major; /* device major number */
+ __be32 di_minor; /* device minor number */
+
+ /* This section varies from gfs1. Padding added to align with
+ * remainder of dinode
+ */
+ __be64 di_goal_meta; /* rgrp to alloc from next */
+ __be64 di_goal_data; /* data block goal */
+ __u32 __pad[2];
+
+ __be32 di_flags; /* GFS2_DIF_... */
+ __be32 di_payload_format; /* GFS2_FORMAT_... */
+ __u16 __pad1; /* Was ditype in gfs1 */
+ __be16 di_height; /* height of metadata */
+ __u32 __pad2; /* Unused incarnation number from gfs1 */
+
+ /* These only apply to directories */
+ __u16 __pad3; /* Padding */
+ __be16 di_depth; /* Number of bits in the table */
+ __be32 di_entries; /* The number of entries in the directory */
+
+ struct gfs2_inum __pad4; /* Unused even in current gfs1 */
+
+ __be64 di_eattr; /* extended attribute block number */
+
+ __u8 di_reserved[56];
+};
+
+/*
+ * directory structure - many of these per directory file
+ */
+
+#define GFS2_FNAMESIZE 255
+#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
+
+struct gfs2_dirent {
+ struct gfs2_inum de_inum;
+ __be32 de_hash;
+ __be16 de_rec_len;
+ __be16 de_name_len;
+ __be16 de_type;
+ __u8 __pad[14];
+};
+
+/*
+ * Header of leaf directory nodes
+ */
+
+struct gfs2_leaf {
+ struct gfs2_meta_header lf_header;
+
+ __be16 lf_depth; /* Depth of leaf */
+ __be16 lf_entries; /* Number of dirents in leaf */
+ __be32 lf_dirent_format; /* Format of the dirents */
+ __be64 lf_next; /* Next leaf, if overflow */
+
+ __u8 lf_reserved[64];
+};
+
+/*
+ * Extended attribute header format
+ */
+
+#define GFS2_EA_MAX_NAME_LEN 255
+#define GFS2_EA_MAX_DATA_LEN 65536
+
+#define GFS2_EATYPE_UNUSED 0
+#define GFS2_EATYPE_USR 1
+#define GFS2_EATYPE_SYS 2
+
+#define GFS2_EATYPE_LAST 2
+#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
+
+#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
+
+struct gfs2_ea_header {
+ __be32 ea_rec_len;
+ __be32 ea_data_len;
+ __u8 ea_name_len; /* no NULL pointer after the string */
+ __u8 ea_type; /* GFS2_EATYPE_... */
+ __u8 ea_flags; /* GFS2_EAFLAG_... */
+ __u8 ea_num_ptrs;
+ __u32 __pad;
+};
+
+/*
+ * Log header structure
+ */
+
+#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
+
+struct gfs2_log_header {
+ struct gfs2_meta_header lh_header;
+
+ __be64 lh_sequence; /* Sequence number of this transaction */
+ __be32 lh_flags; /* GFS2_LOG_HEAD_... */
+ __be32 lh_tail; /* Block number of log tail */
+ __be32 lh_blkno;
+ __be32 lh_hash;
+};
+
+/*
+ * Log type descriptor
+ */
+
+#define GFS2_LOG_DESC_METADATA 300
+/* ld_data1 is the number of metadata blocks in the descriptor.
+ ld_data2 is unused. */
+
+#define GFS2_LOG_DESC_REVOKE 301
+/* ld_data1 is the number of revoke blocks in the descriptor.
+ ld_data2 is unused. */
+
+#define GFS2_LOG_DESC_JDATA 302
+/* ld_data1 is the number of data blocks in the descriptor.
+ ld_data2 is unused. */
+
+struct gfs2_log_descriptor {
+ struct gfs2_meta_header ld_header;
+
+ __be32 ld_type; /* GFS2_LOG_DESC_... */
+ __be32 ld_length; /* Number of buffers in this chunk */
+ __be32 ld_data1; /* descriptor-specific field */
+ __be32 ld_data2; /* descriptor-specific field */
+
+ __u8 ld_reserved[32];
+};
+
+/*
+ * Inum Range
+ * Describe a range of formal inode numbers allocated to
+ * one machine to assign to inodes.
+ */
+
+#define GFS2_INUM_QUANTUM 1048576
+
+struct gfs2_inum_range {
+ __be64 ir_start;
+ __be64 ir_length;
+};
+
+/*
+ * Statfs change
+ * Describes an change to the pool of free and allocated
+ * blocks.
+ */
+
+struct gfs2_statfs_change {
+ __be64 sc_total;
+ __be64 sc_free;
+ __be64 sc_dinodes;
+};
+
+/*
+ * Unlinked Tag
+ * Describes an allocated inode that isn't linked into
+ * the directory tree and might need to be deallocated.
+ */
+
+#define GFS2_UTF_UNINIT 0x00000001
+
+struct gfs2_unlinked_tag {
+ struct gfs2_inum ut_inum;
+ __be32 ut_flags; /* GFS2_UTF_... */
+ __u32 __pad;
+};
+
+/*
+ * Quota change
+ * Describes an allocation change for a particular
+ * user or group.
+ */
+
+#define GFS2_QCF_USER 0x00000001
+
+struct gfs2_quota_change {
+ __be64 qc_change;
+ __be32 qc_flags; /* GFS2_QCF_... */
+ __be32 qc_id;
+};
+
+#ifdef __KERNEL__
+/* Translation functions */
+
+extern void gfs2_inum_in(struct gfs2_inum *no, char *buf);
+extern void gfs2_inum_out(const struct gfs2_inum *no, char *buf);
+extern void gfs2_sb_in(struct gfs2_sb *sb, char *buf);
+extern void gfs2_rindex_in(struct gfs2_rindex *ri, char *buf);
+extern void gfs2_rindex_out(struct gfs2_rindex *ri, char *buf);
+extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, char *buf);
+extern void gfs2_rgrp_out(struct gfs2_rgrp *rg, char *buf);
+extern void gfs2_quota_in(struct gfs2_quota *qu, char *buf);
+extern void gfs2_quota_out(struct gfs2_quota *qu, char *buf);
+extern void gfs2_dinode_in(struct gfs2_dinode *di, char *buf);
+extern void gfs2_dinode_out(struct gfs2_dinode *di, char *buf);
+extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, char *buf);
+extern void gfs2_ea_header_out(struct gfs2_ea_header *ea, char *buf);
+extern void gfs2_log_header_in(struct gfs2_log_header *lh, char *buf);
+extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, char *buf);
+extern void gfs2_inum_range_out(struct gfs2_inum_range *ir, char *buf);
+extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, char *buf);
+extern void gfs2_statfs_change_out(struct gfs2_statfs_change *sc, char *buf);
+extern void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag *ut, char *buf);
+extern void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag *ut, char *buf);
+extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, char *buf);
+
+/* Printing functions */
+
+extern void gfs2_inum_print(struct gfs2_inum *no);
+extern void gfs2_meta_header_print(struct gfs2_meta_header *mh);
+extern void gfs2_sb_print(struct gfs2_sb *sb);
+extern void gfs2_rindex_print(struct gfs2_rindex *ri);
+extern void gfs2_rgrp_print(struct gfs2_rgrp *rg);
+extern void gfs2_quota_print(struct gfs2_quota *qu);
+extern void gfs2_dinode_print(struct gfs2_dinode *di);
+extern void gfs2_dirent_print(struct gfs2_dirent *de, char *name);
+extern void gfs2_leaf_print(struct gfs2_leaf *lf);
+extern void gfs2_ea_header_print(struct gfs2_ea_header *ea, char *name);
+extern void gfs2_log_header_print(struct gfs2_log_header *lh);
+extern void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld);
+extern void gfs2_inum_range_print(struct gfs2_inum_range *ir);
+extern void gfs2_statfs_change_print(struct gfs2_statfs_change *sc);
+extern void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut);
+extern void gfs2_quota_change_print(struct gfs2_quota_change *qc);
+
+#endif /* __KERNEL__ */
+
+#endif /* __GFS2_ONDISK_DOT_H__ */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/