cregit-Linux how code gets into the kernel

Release 4.11 fs/gfs2/incore.h

Directory: fs/gfs2
/*
 * 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;
	
u32 lh_hash;
};

/*
 * 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


struct gfs2_bitmap {
	
struct buffer_head *bi_bh;
	
char *bi_clone;
	
unsigned long bi_flags;
	
u32 bi_offset;
	
u32 bi_start;
	
u32 bi_len;
	
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;
}


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static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
{
	return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
		rbm->offset;
}


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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);
}


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enum gfs2_state_bits {
	
BH_Pinned = BH_PrivateStart,
	
BH_Escaped = BH_PrivateStart + 1,
	
BH_Zeronew = BH_PrivateStart + 2,
};


BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
BUFFER_FNS(Escaped, escaped)
TAS_BUFFER_FNS(Escaped, escaped)
BUFFER_FNS(Zeronew, zeronew)
TAS_BUFFER_FNS(Zeronew, zeronew)

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,
};


struct lm_lockname {
	
struct gfs2_sbd *ln_sbd;
	
u64 ln_number;
	
unsigned int ln_type;
} __packed __aligned(sizeof(int));


#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 {
	/* components used during write (step 1): */
	
atomic_t rs_sizehint;         /* hint of the write size */

	
struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
	
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 */
	
u64 rs_inum;                  /* Inode number for reservation */
};

/*
 * 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 {
	
struct hlist_bl_node gl_list;
	
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 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,
};


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_blkreserv i_res; /* rgrp multi-block reservation */
	
struct gfs2_rgrpd *i_rgd;
	
u64 i_goal;	/* goal block for allocations */
	
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);
}


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static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
{
	return inode->i_sb->s_fs_info;
}


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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,
};


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_jheight; /* Max height of journaled file's meta tree */
	
u64 sd_jheightsize[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;
	
u64 sd_log_flush_wrapped;

	
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];
	
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]++;
}


Contributors
PersonTokensPropCommitsCommitProp
Steven Whitehouse25100.00%1100.00%


Total25100.00%1100.00%






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();
}


Contributors
PersonTokensPropCommitsCommitProp
Steven Whitehouse5394.64%150.00%


Robert S Peterson35.36%150.00%


Total56100.00%2100.00%



#endif /* __INCORE_DOT_H__ */


Overall Contributors
PersonTokensPropCommitsCommitProp
David Teigland117542.99%74.55%


Steven Whitehouse103337.80%8454.55%


Robert S Peterson30411.12%2918.83%


Benjamin Marzinski1565.71%127.79%


Abhijith Das210.77%63.90%


Andreas Gruenbacher120.44%31.95%


Christoph Hellwig70.26%10.65%


Jan Kara50.18%10.65%


Al Viro40.15%31.95%


Pavel Emelyanov30.11%10.65%


Alexey Dobriyan30.11%10.65%


S. Wendy Cheng30.11%10.65%


Dave Chinner30.11%10.65%


Eric W. Biedermann10.04%10.65%


Tejun Heo10.04%10.65%


David Woodhouse10.04%10.65%


Ben Hutchings10.04%10.65%


Total2733100.00%154100.00%


Directory: fs/gfs2



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