blob: 888b62cfd6d1a8366c7837f9b37d51d4118e275f [file] [log] [blame]
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2008 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>
#include <linux/kobject.h>
#include <linux/workqueue.h>
#include <linux/dlm.h>
#include <linux/buffer_head.h>
#include <linux/rcupdate.h>
#include <linux/rculist_bl.h>
#include <linux/completion.h>
#include <linux/rbtree.h>
#include <linux/ktime.h>
#include <linux/percpu.h>
#include <linux/lockref.h>
#include <linux/rhashtable.h>
#define DIO_WAIT 0x00000010
#define DIO_METADATA 0x00000020
struct gfs2_log_operations;
struct gfs2_bufdata;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_quota_data;
struct gfs2_trans;
struct gfs2_jdesc;
struct gfs2_sbd;
struct lm_lockops;
typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
struct gfs2_log_header_host {
u64 lh_sequence; /* Sequence number of this transaction */
u32 lh_flags; /* GFS2_LOG_HEAD_... */
u32 lh_tail; /* Block number of log tail */
u32 lh_blkno;
};
/*
* Structure of operations that are associated with each
* type of element in the log.
*/
struct gfs2_log_operations {
void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
void (*lo_before_scan) (struct gfs2_jdesc *jd,
struct gfs2_log_header_host *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;
};
#define GBF_FULL 1
/**
* Clone bitmaps (bi_clone):
*
* - When a block is freed, we remember the previous state of the block in the
* clone bitmap, and only mark the block as free in the real bitmap.
*
* - When looking for a block to allocate, we check for a free block in the
* clone bitmap, and if no clone bitmap exists, in the real bitmap.
*
* - For allocating a block, we mark it as allocated in the real bitmap, and if
* a clone bitmap exists, also in the clone bitmap.
*
* - At the end of a log_flush, we copy the real bitmap into the clone bitmap
* to make the clone bitmap reflect the current allocation state.
* (Alternatively, we could remove the clone bitmap.)
*
* The clone bitmaps are in-core only, and is never written to disk.
*
* These steps ensure that blocks which have been freed in a transaction cannot
* be reallocated in that same transaction.
*/
struct gfs2_bitmap {
struct buffer_head *bi_bh;
char *bi_clone;
unsigned long bi_flags;
u32 bi_offset;
u32 bi_start;
u32 bi_bytes;
u32 bi_blocks;
};
struct gfs2_rgrpd {
struct rb_node rd_node; /* Link with superblock */
struct gfs2_glock *rd_gl; /* Glock for this rgrp */
u64 rd_addr; /* grp block disk address */
u64 rd_data0; /* first data location */
u32 rd_length; /* length of rgrp header in fs blocks */
u32 rd_data; /* num of data blocks in rgrp */
u32 rd_bitbytes; /* number of bytes in data bitmaps */
u32 rd_free;
u32 rd_reserved; /* number of blocks reserved */
u32 rd_free_clone;
u32 rd_dinodes;
u64 rd_igeneration;
struct gfs2_bitmap *rd_bits;
struct gfs2_sbd *rd_sbd;
struct gfs2_rgrp_lvb *rd_rgl;
u32 rd_last_alloc;
u32 rd_flags;
u32 rd_extfail_pt; /* extent failure point */
#define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
#define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
#define GFS2_RDF_ERROR 0x40000000 /* error in rg */
#define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */
#define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
spinlock_t rd_rsspin; /* protects reservation related vars */
struct rb_root rd_rstree; /* multi-block reservation tree */
};
struct gfs2_rbm {
struct gfs2_rgrpd *rgd;
u32 offset; /* The offset is bitmap relative */
int bii; /* Bitmap index */
};
static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
{
return rbm->rgd->rd_bits + rbm->bii;
}
static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
{
BUG_ON(rbm->offset >= rbm->rgd->rd_data);
return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
rbm->offset;
}
static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
const struct gfs2_rbm *rbm2)
{
return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
(rbm1->offset == rbm2->offset);
}
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;
u64 bd_blkno;
struct list_head bd_list;
const struct gfs2_log_operations *bd_ops;
struct gfs2_trans *bd_tr;
struct list_head bd_ail_st_list;
struct list_head bd_ail_gl_list;
};
/*
* Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
* prefix of lock_dlm_ gets awkward.
*/
#define GDLM_STRNAME_BYTES 25
#define GDLM_LVB_SIZE 32
/*
* ls_recover_flags:
*
* DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
* held by failed nodes whose journals need recovery. Those locks should
* only be used for journal recovery until the journal recovery is done.
* This is set by the dlm recover_prep callback and cleared by the
* gfs2_control thread when journal recovery is complete. To avoid
* races between recover_prep setting and gfs2_control clearing, recover_spin
* is held while changing this bit and reading/writing recover_block
* and recover_start.
*
* DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
*
* DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
* recovery of all journals before allowing other nodes to mount the fs.
* This is cleared when FIRST_MOUNT_DONE is set.
*
* DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
* recovery of all journals, and now allows other nodes to mount the fs.
*
* DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
* BLOCK_LOCKS for the first time. The gfs2_control thread should now
* control clearing BLOCK_LOCKS for further recoveries.
*
* DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
*
* DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
* and recover_done(), i.e. set while recover_block == recover_start.
*/
enum {
DFL_BLOCK_LOCKS = 0,
DFL_NO_DLM_OPS = 1,
DFL_FIRST_MOUNT = 2,
DFL_FIRST_MOUNT_DONE = 3,
DFL_MOUNT_DONE = 4,
DFL_UNMOUNT = 5,
DFL_DLM_RECOVERY = 6,
};
/*
* We are using struct lm_lockname as an rhashtable key. Avoid holes within
* the struct; padding at the end is fine.
*/
struct lm_lockname {
u64 ln_number;
struct gfs2_sbd *ln_sbd;
unsigned int ln_type;
};
#define lm_name_equal(name1, name2) \
(((name1)->ln_number == (name2)->ln_number) && \
((name1)->ln_type == (name2)->ln_type) && \
((name1)->ln_sbd == (name2)->ln_sbd))
struct gfs2_glock_operations {
void (*go_sync) (struct gfs2_glock *gl);
int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
void (*go_inval) (struct gfs2_glock *gl, int flags);
int (*go_demote_ok) (const struct gfs2_glock *gl);
int (*go_lock) (struct gfs2_holder *gh);
void (*go_unlock) (struct gfs2_holder *gh);
void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
void (*go_callback)(struct gfs2_glock *gl, bool remote);
const int go_type;
const unsigned long go_flags;
#define GLOF_ASPACE 1
#define GLOF_LVB 2
#define GLOF_LRU 4
};
enum {
GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
GFS2_NR_LKSTATS
};
struct gfs2_lkstats {
u64 stats[GFS2_NR_LKSTATS];
};
enum {
/* States */
HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
HIF_FIRST = 7,
HIF_WAIT = 10,
};
struct gfs2_holder {
struct list_head gh_list;
struct gfs2_glock *gh_gl;
struct pid *gh_owner_pid;
u16 gh_flags;
u16 gh_state;
int gh_error;
unsigned long gh_iflags; /* HIF_... */
unsigned long gh_ip;
};
/* Number of quota types we support */
#define GFS2_MAXQUOTAS 2
struct gfs2_qadata { /* quota allocation data */
/* Quota stuff */
struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
unsigned int qa_qd_num;
};
/* Resource group multi-block reservation, in order of appearance:
Step 1. Function prepares to write, allocates a mb, sets the size hint.
Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
Step 4. Bits are assigned from the rgrp based on either the reservation
or wherever it can.
*/
struct gfs2_blkreserv {
struct rb_node rs_node; /* link to other block reservations */
struct gfs2_rbm rs_rbm; /* Start of reservation */
u32 rs_free; /* how many blocks are still free */
};
/*
* Allocation parameters
* @target: The number of blocks we'd ideally like to allocate
* @aflags: The flags (e.g. Orlov flag)
*
* The intent is to gradually expand this structure over time in
* order to give more information, e.g. alignment, min extent size
* to the allocation code.
*/
struct gfs2_alloc_parms {
u64 target;
u32 min_target;
u32 aflags;
u64 allowed;
};
enum {
GLF_LOCK = 1,
GLF_DEMOTE = 3,
GLF_PENDING_DEMOTE = 4,
GLF_DEMOTE_IN_PROGRESS = 5,
GLF_DIRTY = 6,
GLF_LFLUSH = 7,
GLF_INVALIDATE_IN_PROGRESS = 8,
GLF_REPLY_PENDING = 9,
GLF_INITIAL = 10,
GLF_FROZEN = 11,
GLF_QUEUED = 12,
GLF_LRU = 13,
GLF_OBJECT = 14, /* Used only for tracing */
GLF_BLOCKING = 15,
GLF_INODE_CREATING = 16, /* Inode creation occurring */
};
struct gfs2_glock {
unsigned long gl_flags; /* GLF_... */
struct lm_lockname gl_name;
struct lockref gl_lockref;
/* State fields protected by gl_lockref.lock */
unsigned int gl_state:2, /* Current state */
gl_target:2, /* Target state */
gl_demote_state:2, /* State requested by remote node */
gl_req:2, /* State in last dlm request */
gl_reply:8; /* Last reply from the dlm */
unsigned long gl_demote_time; /* time of first demote request */
long gl_hold_time;
struct list_head gl_holders;
const struct gfs2_glock_operations *gl_ops;
ktime_t gl_dstamp;
struct gfs2_lkstats gl_stats;
struct dlm_lksb gl_lksb;
unsigned long gl_tchange;
void *gl_object;
struct list_head gl_lru;
struct list_head gl_ail_list;
atomic_t gl_ail_count;
atomic_t gl_revokes;
struct delayed_work gl_work;
union {
/* For inode and iopen glocks only */
struct work_struct gl_delete;
/* For rgrp glocks only */
struct {
loff_t start;
loff_t end;
} gl_vm;
};
struct rcu_head gl_rcu;
struct rhash_head gl_node;
};
#define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
enum {
GIF_INVALID = 0,
GIF_QD_LOCKED = 1,
GIF_ALLOC_FAILED = 2,
GIF_SW_PAGED = 3,
GIF_ORDERED = 4,
GIF_FREE_VFS_INODE = 5,
GIF_GLOP_PENDING = 6,
};
struct gfs2_inode {
struct inode i_inode;
u64 i_no_addr;
u64 i_no_formal_ino;
u64 i_generation;
u64 i_eattr;
unsigned long i_flags; /* GIF_... */
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_qadata *i_qadata; /* quota allocation data */
struct gfs2_holder i_rgd_gh;
struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
u64 i_goal; /* goal block for allocations */
atomic_t i_sizehint; /* hint of the write size */
struct rw_semaphore i_rw_mutex;
struct list_head i_ordered;
struct list_head i_trunc_list;
__be64 *i_hash_cache;
u32 i_entries;
u32 i_diskflags;
u8 i_height;
u8 i_depth;
u16 i_rahead;
};
/*
* 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);
}
static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
{
return inode->i_sb->s_fs_info;
}
struct gfs2_file {
struct mutex f_fl_mutex;
struct gfs2_holder f_fl_gh;
};
struct gfs2_revoke_replay {
struct list_head rr_list;
u64 rr_blkno;
unsigned int rr_where;
};
enum {
QDF_CHANGE = 1,
QDF_LOCKED = 2,
QDF_REFRESH = 3,
QDF_QMSG_QUIET = 4,
};
struct gfs2_quota_data {
struct hlist_bl_node qd_hlist;
struct list_head qd_list;
struct kqid qd_id;
struct gfs2_sbd *qd_sbd;
struct lockref qd_lockref;
struct list_head qd_lru;
unsigned qd_hash;
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;
struct rcu_head qd_rcu;
};
enum {
TR_TOUCHED = 1,
TR_ATTACHED = 2,
TR_ALLOCED = 3,
};
struct gfs2_trans {
unsigned long tr_ip;
unsigned int tr_blocks;
unsigned int tr_revokes;
unsigned int tr_reserved;
unsigned long tr_flags;
unsigned int tr_num_buf_new;
unsigned int tr_num_databuf_new;
unsigned int tr_num_buf_rm;
unsigned int tr_num_databuf_rm;
unsigned int tr_num_revoke;
unsigned int tr_num_revoke_rm;
struct list_head tr_list;
struct list_head tr_databuf;
struct list_head tr_buf;
unsigned int tr_first;
struct list_head tr_ail1_list;
struct list_head tr_ail2_list;
};
struct gfs2_journal_extent {
struct list_head list;
unsigned int lblock; /* First logical block */
u64 dblock; /* First disk block */
u64 blocks;
};
struct gfs2_jdesc {
struct list_head jd_list;
struct list_head extent_list;
unsigned int nr_extents;
struct work_struct jd_work;
struct inode *jd_inode;
unsigned long jd_flags;
#define JDF_RECOVERY 1
unsigned int jd_jid;
unsigned int jd_blocks;
int jd_recover_error;
/* Replay stuff */
unsigned int jd_found_blocks;
unsigned int jd_found_revokes;
unsigned int jd_replayed_blocks;
struct list_head jd_revoke_list;
unsigned int jd_replay_tail;
};
struct gfs2_statfs_change_host {
s64 sc_total;
s64 sc_free;
s64 sc_dinodes;
};
#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
#define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
#define GFS2_ERRORS_WITHDRAW 0
#define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
#define GFS2_ERRORS_RO 2 /* place holder for future feature */
#define GFS2_ERRORS_PANIC 3
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 */
unsigned int ar_spectator:1; /* Don't get a journal */
unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
unsigned int ar_debug:1; /* Oops on errors */
unsigned int ar_posix_acl:1; /* Enable posix acls */
unsigned int ar_quota:2; /* off/account/on */
unsigned int ar_suiddir:1; /* suiddir support */
unsigned int ar_data:2; /* ordered/writeback */
unsigned int ar_meta:1; /* mount metafs */
unsigned int ar_discard:1; /* discard requests */
unsigned int ar_errors:2; /* errors=withdraw | panic */
unsigned int ar_nobarrier:1; /* do not send barriers */
unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
unsigned int ar_loccookie:1; /* use location based readdir
cookies */
int ar_commit; /* Commit interval */
int ar_statfs_quantum; /* The fast statfs interval */
int ar_quota_quantum; /* The quota interval */
int ar_statfs_percent; /* The % change to force sync */
};
struct gfs2_tune {
spinlock_t gt_spin;
unsigned int gt_logd_secs;
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_quantum; /* Secs between syncs to quota file */
unsigned int gt_new_files_jdata;
unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
unsigned int gt_complain_secs;
unsigned int gt_statfs_quantum;
unsigned int gt_statfs_slow;
};
enum {
SDF_JOURNAL_CHECKED = 0,
SDF_JOURNAL_LIVE = 1,
SDF_SHUTDOWN = 2,
SDF_NOBARRIERS = 3,
SDF_NORECOVERY = 4,
SDF_DEMOTE = 5,
SDF_NOJOURNALID = 6,
SDF_RORECOVERY = 7, /* read only recovery */
SDF_SKIP_DLM_UNLOCK = 8,
SDF_FORCE_AIL_FLUSH = 9,
SDF_AIL1_IO_ERROR = 10,
};
enum gfs2_freeze_state {
SFS_UNFROZEN = 0,
SFS_STARTING_FREEZE = 1,
SFS_FROZEN = 2,
};
#define GFS2_FSNAME_LEN 256
struct gfs2_inum_host {
u64 no_formal_ino;
u64 no_addr;
};
struct gfs2_sb_host {
u32 sb_magic;
u32 sb_type;
u32 sb_format;
u32 sb_fs_format;
u32 sb_multihost_format;
u32 sb_bsize;
u32 sb_bsize_shift;
struct gfs2_inum_host sb_master_dir;
struct gfs2_inum_host sb_root_dir;
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
};
/*
* lm_mount() return values
*
* ls_jid - the journal ID this node should use
* ls_first - this node is the first to mount the file system
* ls_lockspace - lock module's context for this file system
* ls_ops - lock module's functions
*/
struct lm_lockstruct {
int ls_jid;
unsigned int ls_first;
const struct lm_lockops *ls_ops;
dlm_lockspace_t *ls_dlm;
int ls_recover_jid_done; /* These two are deprecated, */
int ls_recover_jid_status; /* used previously by gfs_controld */
struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
struct dlm_lksb ls_control_lksb; /* control_lock */
char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
char *ls_lvb_bits;
spinlock_t ls_recover_spin; /* protects following fields */
unsigned long ls_recover_flags; /* DFL_ */
uint32_t ls_recover_mount; /* gen in first recover_done cb */
uint32_t ls_recover_start; /* gen in last recover_done cb */
uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
uint32_t ls_recover_size; /* size of recover_submit, recover_result */
uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
uint32_t *ls_recover_result; /* result of last jid recovery */
};
struct gfs2_pcpu_lkstats {
/* One struct for each glock type */
struct gfs2_lkstats lkstats[10];
};
struct gfs2_sbd {
struct super_block *sd_vfs;
struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
struct kobject sd_kobj;
unsigned long sd_flags; /* SDF_... */
struct gfs2_sb_host 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_blocks_per_bitmap;
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 + 1];
u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
struct gfs2_args sd_args; /* Mount arguments */
struct gfs2_tune sd_tune; /* Filesystem tuning structure */
/* Lock Stuff */
struct lm_lockstruct sd_lockstruct;
struct gfs2_holder sd_live_gh;
struct gfs2_glock *sd_rename_gl;
struct gfs2_glock *sd_freeze_gl;
struct work_struct sd_freeze_work;
wait_queue_head_t sd_glock_wait;
atomic_t sd_glock_disposal;
struct completion sd_locking_init;
struct completion sd_wdack;
struct delayed_work sd_control_work;
/* Inode Stuff */
struct dentry *sd_master_dir;
struct dentry *sd_root_dir;
struct inode *sd_jindex;
struct inode *sd_statfs_inode;
struct inode *sd_sc_inode;
struct inode *sd_qc_inode;
struct inode *sd_rindex;
struct inode *sd_quota_inode;
/* StatFS stuff */
spinlock_t sd_statfs_spin;
struct gfs2_statfs_change_host sd_statfs_master;
struct gfs2_statfs_change_host sd_statfs_local;
int sd_statfs_force_sync;
/* Resource group stuff */
int sd_rindex_uptodate;
spinlock_t sd_rindex_spin;
struct rb_root sd_rindex_tree;
unsigned int sd_rgrps;
unsigned int sd_max_rg_data;
/* Journal index stuff */
struct list_head sd_jindex_list;
spinlock_t sd_jindex_spin;
struct mutex sd_jindex_mutex;
unsigned int sd_journals;
struct gfs2_jdesc *sd_jdesc;
struct gfs2_holder sd_journal_gh;
struct gfs2_holder sd_jinode_gh;
struct gfs2_holder sd_sc_gh;
struct gfs2_holder sd_qc_gh;
struct completion sd_journal_ready;
/* Daemon stuff */
struct task_struct *sd_logd_process;
struct task_struct *sd_quotad_process;
/* Quota stuff */
struct list_head sd_quota_list;
atomic_t sd_quota_count;
struct mutex sd_quota_mutex;
struct mutex sd_quota_sync_mutex;
wait_queue_head_t sd_quota_wait;
struct list_head sd_trunc_list;
spinlock_t sd_trunc_lock;
unsigned int sd_quota_slots;
unsigned long *sd_quota_bitmap;
spinlock_t sd_bitmap_lock;
u64 sd_quota_sync_gen;
/* Log stuff */
struct address_space sd_aspace;
spinlock_t sd_log_lock;
struct gfs2_trans *sd_log_tr;
unsigned int sd_log_blks_reserved;
int sd_log_commited_revoke;
atomic_t sd_log_pinned;
unsigned int sd_log_num_revoke;
struct list_head sd_log_le_revoke;
struct list_head sd_log_le_ordered;
spinlock_t sd_ordered_lock;
atomic_t sd_log_thresh1;
atomic_t sd_log_thresh2;
atomic_t sd_log_blks_free;
atomic_t sd_log_blks_needed;
wait_queue_head_t sd_log_waitq;
wait_queue_head_t sd_logd_waitq;
u64 sd_log_sequence;
unsigned int sd_log_head;
unsigned int sd_log_tail;
int sd_log_idle;
struct rw_semaphore sd_log_flush_lock;
atomic_t sd_log_in_flight;
struct bio *sd_log_bio;
wait_queue_head_t sd_log_flush_wait;
int sd_log_error;
atomic_t sd_reserving_log;
wait_queue_head_t sd_reserving_log_wait;
unsigned int sd_log_flush_head;
spinlock_t sd_ail_lock;
struct list_head sd_ail1_list;
struct list_head sd_ail2_list;
/* For quiescing the filesystem */
struct gfs2_holder sd_freeze_gh;
atomic_t sd_freeze_state;
struct mutex sd_freeze_mutex;
char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
char sd_table_name[GFS2_FSNAME_LEN];
char sd_proto_name[GFS2_FSNAME_LEN];
/* Debugging crud */
unsigned long sd_last_warning;
struct dentry *debugfs_dir; /* debugfs directory */
struct dentry *debugfs_dentry_glocks;
struct dentry *debugfs_dentry_glstats;
struct dentry *debugfs_dentry_sbstats;
};
static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
{
gl->gl_stats.stats[which]++;
}
static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
{
const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
preempt_disable();
this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
preempt_enable();
}
extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
{
return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
}
#endif /* __INCORE_DOT_H__ */