xref: /openbmc/linux/fs/gfs2/incore.h (revision 05bcf503)
1  /*
2   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3   * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
4   *
5   * This copyrighted material is made available to anyone wishing to use,
6   * modify, copy, or redistribute it subject to the terms and conditions
7   * of the GNU General Public License version 2.
8   */
9  
10  #ifndef __INCORE_DOT_H__
11  #define __INCORE_DOT_H__
12  
13  #include <linux/fs.h>
14  #include <linux/kobject.h>
15  #include <linux/workqueue.h>
16  #include <linux/dlm.h>
17  #include <linux/buffer_head.h>
18  #include <linux/rcupdate.h>
19  #include <linux/rculist_bl.h>
20  #include <linux/completion.h>
21  #include <linux/rbtree.h>
22  #include <linux/ktime.h>
23  #include <linux/percpu.h>
24  
25  #define DIO_WAIT	0x00000010
26  #define DIO_METADATA	0x00000020
27  
28  struct gfs2_log_operations;
29  struct gfs2_bufdata;
30  struct gfs2_holder;
31  struct gfs2_glock;
32  struct gfs2_quota_data;
33  struct gfs2_trans;
34  struct gfs2_ail;
35  struct gfs2_jdesc;
36  struct gfs2_sbd;
37  struct lm_lockops;
38  
39  typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
40  
41  struct gfs2_log_header_host {
42  	u64 lh_sequence;	/* Sequence number of this transaction */
43  	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
44  	u32 lh_tail;		/* Block number of log tail */
45  	u32 lh_blkno;
46  	u32 lh_hash;
47  };
48  
49  /*
50   * Structure of operations that are associated with each
51   * type of element in the log.
52   */
53  
54  struct gfs2_log_operations {
55  	void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
56  	void (*lo_before_commit) (struct gfs2_sbd *sdp);
57  	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
58  	void (*lo_before_scan) (struct gfs2_jdesc *jd,
59  				struct gfs2_log_header_host *head, int pass);
60  	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
61  				 struct gfs2_log_descriptor *ld, __be64 *ptr,
62  				 int pass);
63  	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
64  	const char *lo_name;
65  };
66  
67  #define GBF_FULL 1
68  
69  struct gfs2_bitmap {
70  	struct buffer_head *bi_bh;
71  	char *bi_clone;
72  	unsigned long bi_flags;
73  	u32 bi_offset;
74  	u32 bi_start;
75  	u32 bi_len;
76  };
77  
78  struct gfs2_rgrpd {
79  	struct rb_node rd_node;		/* Link with superblock */
80  	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
81  	u64 rd_addr;			/* grp block disk address */
82  	u64 rd_data0;			/* first data location */
83  	u32 rd_length;			/* length of rgrp header in fs blocks */
84  	u32 rd_data;			/* num of data blocks in rgrp */
85  	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
86  	u32 rd_free;
87  	u32 rd_reserved;                /* number of blocks reserved */
88  	u32 rd_free_clone;
89  	u32 rd_dinodes;
90  	u64 rd_igeneration;
91  	struct gfs2_bitmap *rd_bits;
92  	struct gfs2_sbd *rd_sbd;
93  	struct gfs2_rgrp_lvb *rd_rgl;
94  	u32 rd_last_alloc;
95  	u32 rd_flags;
96  #define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
97  #define GFS2_RDF_UPTODATE	0x20000000 /* rg is up to date */
98  #define GFS2_RDF_ERROR		0x40000000 /* error in rg */
99  #define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */
100  	spinlock_t rd_rsspin;           /* protects reservation related vars */
101  	struct rb_root rd_rstree;       /* multi-block reservation tree */
102  };
103  
104  struct gfs2_rbm {
105  	struct gfs2_rgrpd *rgd;
106  	struct gfs2_bitmap *bi;	/* Bitmap must belong to the rgd */
107  	u32 offset;		/* The offset is bitmap relative */
108  };
109  
110  static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
111  {
112  	return rbm->rgd->rd_data0 + (rbm->bi->bi_start * GFS2_NBBY) + rbm->offset;
113  }
114  
115  static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
116  			       const struct gfs2_rbm *rbm2)
117  {
118  	return (rbm1->rgd == rbm2->rgd) && (rbm1->bi == rbm2->bi) &&
119  	       (rbm1->offset == rbm2->offset);
120  }
121  
122  enum gfs2_state_bits {
123  	BH_Pinned = BH_PrivateStart,
124  	BH_Escaped = BH_PrivateStart + 1,
125  	BH_Zeronew = BH_PrivateStart + 2,
126  };
127  
128  BUFFER_FNS(Pinned, pinned)
129  TAS_BUFFER_FNS(Pinned, pinned)
130  BUFFER_FNS(Escaped, escaped)
131  TAS_BUFFER_FNS(Escaped, escaped)
132  BUFFER_FNS(Zeronew, zeronew)
133  TAS_BUFFER_FNS(Zeronew, zeronew)
134  
135  struct gfs2_bufdata {
136  	struct buffer_head *bd_bh;
137  	struct gfs2_glock *bd_gl;
138  	u64 bd_blkno;
139  
140  	struct list_head bd_list;
141  	const struct gfs2_log_operations *bd_ops;
142  
143  	struct gfs2_ail *bd_ail;
144  	struct list_head bd_ail_st_list;
145  	struct list_head bd_ail_gl_list;
146  };
147  
148  /*
149   * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
150   * prefix of lock_dlm_ gets awkward.
151   */
152  
153  #define GDLM_STRNAME_BYTES	25
154  #define GDLM_LVB_SIZE		32
155  
156  /*
157   * ls_recover_flags:
158   *
159   * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
160   * held by failed nodes whose journals need recovery.  Those locks should
161   * only be used for journal recovery until the journal recovery is done.
162   * This is set by the dlm recover_prep callback and cleared by the
163   * gfs2_control thread when journal recovery is complete.  To avoid
164   * races between recover_prep setting and gfs2_control clearing, recover_spin
165   * is held while changing this bit and reading/writing recover_block
166   * and recover_start.
167   *
168   * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
169   *
170   * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
171   * recovery of all journals before allowing other nodes to mount the fs.
172   * This is cleared when FIRST_MOUNT_DONE is set.
173   *
174   * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
175   * recovery of all journals, and now allows other nodes to mount the fs.
176   *
177   * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
178   * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
179   * control clearing BLOCK_LOCKS for further recoveries.
180   *
181   * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
182   *
183   * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
184   * and recover_done(), i.e. set while recover_block == recover_start.
185   */
186  
187  enum {
188  	DFL_BLOCK_LOCKS		= 0,
189  	DFL_NO_DLM_OPS		= 1,
190  	DFL_FIRST_MOUNT		= 2,
191  	DFL_FIRST_MOUNT_DONE	= 3,
192  	DFL_MOUNT_DONE		= 4,
193  	DFL_UNMOUNT		= 5,
194  	DFL_DLM_RECOVERY	= 6,
195  };
196  
197  struct lm_lockname {
198  	u64 ln_number;
199  	unsigned int ln_type;
200  };
201  
202  #define lm_name_equal(name1, name2) \
203          (((name1)->ln_number == (name2)->ln_number) && \
204           ((name1)->ln_type == (name2)->ln_type))
205  
206  
207  struct gfs2_glock_operations {
208  	void (*go_xmote_th) (struct gfs2_glock *gl);
209  	int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
210  	void (*go_inval) (struct gfs2_glock *gl, int flags);
211  	int (*go_demote_ok) (const struct gfs2_glock *gl);
212  	int (*go_lock) (struct gfs2_holder *gh);
213  	void (*go_unlock) (struct gfs2_holder *gh);
214  	int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
215  	void (*go_callback) (struct gfs2_glock *gl);
216  	const int go_type;
217  	const unsigned long go_flags;
218  #define GLOF_ASPACE 1
219  };
220  
221  enum {
222  	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
223  	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
224  	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
225  	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
226  	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
227  	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
228  	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
229  	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
230  	GFS2_NR_LKSTATS
231  };
232  
233  struct gfs2_lkstats {
234  	s64 stats[GFS2_NR_LKSTATS];
235  };
236  
237  enum {
238  	/* States */
239  	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
240  	HIF_FIRST		= 7,
241  	HIF_WAIT		= 10,
242  };
243  
244  struct gfs2_holder {
245  	struct list_head gh_list;
246  
247  	struct gfs2_glock *gh_gl;
248  	struct pid *gh_owner_pid;
249  	unsigned int gh_state;
250  	unsigned gh_flags;
251  
252  	int gh_error;
253  	unsigned long gh_iflags; /* HIF_... */
254  	unsigned long gh_ip;
255  };
256  
257  /* Resource group multi-block reservation, in order of appearance:
258  
259     Step 1. Function prepares to write, allocates a mb, sets the size hint.
260     Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
261     Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
262     Step 4. Bits are assigned from the rgrp based on either the reservation
263             or wherever it can.
264  */
265  
266  struct gfs2_blkreserv {
267  	/* components used during write (step 1): */
268  	atomic_t rs_sizehint;         /* hint of the write size */
269  
270  	struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
271  	struct rb_node rs_node;       /* link to other block reservations */
272  	struct gfs2_rbm rs_rbm;       /* Start of reservation */
273  	u32 rs_free;                  /* how many blocks are still free */
274  	u64 rs_inum;                  /* Inode number for reservation */
275  
276  	/* ancillary quota stuff */
277  	struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
278  	struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
279  	unsigned int rs_qa_qd_num;
280  };
281  
282  enum {
283  	GLF_LOCK			= 1,
284  	GLF_DEMOTE			= 3,
285  	GLF_PENDING_DEMOTE		= 4,
286  	GLF_DEMOTE_IN_PROGRESS		= 5,
287  	GLF_DIRTY			= 6,
288  	GLF_LFLUSH			= 7,
289  	GLF_INVALIDATE_IN_PROGRESS	= 8,
290  	GLF_REPLY_PENDING		= 9,
291  	GLF_INITIAL			= 10,
292  	GLF_FROZEN			= 11,
293  	GLF_QUEUED			= 12,
294  	GLF_LRU				= 13,
295  	GLF_OBJECT			= 14, /* Used only for tracing */
296  	GLF_BLOCKING			= 15,
297  };
298  
299  struct gfs2_glock {
300  	struct hlist_bl_node gl_list;
301  	struct gfs2_sbd *gl_sbd;
302  	unsigned long gl_flags;		/* GLF_... */
303  	struct lm_lockname gl_name;
304  	atomic_t gl_ref;
305  
306  	spinlock_t gl_spin;
307  
308  	/* State fields protected by gl_spin */
309  	unsigned int gl_state:2,	/* Current state */
310  		     gl_target:2,	/* Target state */
311  		     gl_demote_state:2,	/* State requested by remote node */
312  		     gl_req:2,		/* State in last dlm request */
313  		     gl_reply:8;	/* Last reply from the dlm */
314  
315  	unsigned int gl_hash;
316  	unsigned long gl_demote_time; /* time of first demote request */
317  	long gl_hold_time;
318  	struct list_head gl_holders;
319  
320  	const struct gfs2_glock_operations *gl_ops;
321  	ktime_t gl_dstamp;
322  	struct gfs2_lkstats gl_stats;
323  	struct dlm_lksb gl_lksb;
324  	char gl_lvb[32];
325  	unsigned long gl_tchange;
326  	void *gl_object;
327  
328  	struct list_head gl_lru;
329  	struct list_head gl_ail_list;
330  	atomic_t gl_ail_count;
331  	atomic_t gl_revokes;
332  	struct delayed_work gl_work;
333  	struct work_struct gl_delete;
334  	struct rcu_head gl_rcu;
335  };
336  
337  #define GFS2_MIN_LVB_SIZE 32	/* Min size of LVB that gfs2 supports */
338  
339  enum {
340  	GIF_INVALID		= 0,
341  	GIF_QD_LOCKED		= 1,
342  	GIF_ALLOC_FAILED	= 2,
343  	GIF_SW_PAGED		= 3,
344  };
345  
346  struct gfs2_inode {
347  	struct inode i_inode;
348  	u64 i_no_addr;
349  	u64 i_no_formal_ino;
350  	u64 i_generation;
351  	u64 i_eattr;
352  	unsigned long i_flags;		/* GIF_... */
353  	struct gfs2_glock *i_gl; /* Move into i_gh? */
354  	struct gfs2_holder i_iopen_gh;
355  	struct gfs2_holder i_gh; /* for prepare/commit_write only */
356  	struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
357  	struct gfs2_rgrpd *i_rgd;
358  	u64 i_goal;	/* goal block for allocations */
359  	struct rw_semaphore i_rw_mutex;
360  	struct list_head i_trunc_list;
361  	__be64 *i_hash_cache;
362  	u32 i_entries;
363  	u32 i_diskflags;
364  	u8 i_height;
365  	u8 i_depth;
366  };
367  
368  /*
369   * Since i_inode is the first element of struct gfs2_inode,
370   * this is effectively a cast.
371   */
372  static inline struct gfs2_inode *GFS2_I(struct inode *inode)
373  {
374  	return container_of(inode, struct gfs2_inode, i_inode);
375  }
376  
377  static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
378  {
379  	return inode->i_sb->s_fs_info;
380  }
381  
382  struct gfs2_file {
383  	struct mutex f_fl_mutex;
384  	struct gfs2_holder f_fl_gh;
385  };
386  
387  struct gfs2_revoke_replay {
388  	struct list_head rr_list;
389  	u64 rr_blkno;
390  	unsigned int rr_where;
391  };
392  
393  enum {
394  	QDF_USER		= 0,
395  	QDF_CHANGE		= 1,
396  	QDF_LOCKED		= 2,
397  	QDF_REFRESH		= 3,
398  };
399  
400  struct gfs2_quota_data {
401  	struct list_head qd_list;
402  	struct list_head qd_reclaim;
403  
404  	atomic_t qd_count;
405  
406  	u32 qd_id;
407  	unsigned long qd_flags;		/* QDF_... */
408  
409  	s64 qd_change;
410  	s64 qd_change_sync;
411  
412  	unsigned int qd_slot;
413  	unsigned int qd_slot_count;
414  
415  	struct buffer_head *qd_bh;
416  	struct gfs2_quota_change *qd_bh_qc;
417  	unsigned int qd_bh_count;
418  
419  	struct gfs2_glock *qd_gl;
420  	struct gfs2_quota_lvb qd_qb;
421  
422  	u64 qd_sync_gen;
423  	unsigned long qd_last_warn;
424  };
425  
426  struct gfs2_trans {
427  	unsigned long tr_ip;
428  
429  	unsigned int tr_blocks;
430  	unsigned int tr_revokes;
431  	unsigned int tr_reserved;
432  
433  	struct gfs2_holder tr_t_gh;
434  
435  	int tr_touched;
436  
437  	unsigned int tr_num_buf_new;
438  	unsigned int tr_num_databuf_new;
439  	unsigned int tr_num_buf_rm;
440  	unsigned int tr_num_databuf_rm;
441  	unsigned int tr_num_revoke;
442  	unsigned int tr_num_revoke_rm;
443  };
444  
445  struct gfs2_ail {
446  	struct list_head ai_list;
447  
448  	unsigned int ai_first;
449  	struct list_head ai_ail1_list;
450  	struct list_head ai_ail2_list;
451  };
452  
453  struct gfs2_journal_extent {
454  	struct list_head extent_list;
455  
456  	unsigned int lblock; /* First logical block */
457  	u64 dblock; /* First disk block */
458  	u64 blocks;
459  };
460  
461  struct gfs2_jdesc {
462  	struct list_head jd_list;
463  	struct list_head extent_list;
464  	struct work_struct jd_work;
465  	struct inode *jd_inode;
466  	unsigned long jd_flags;
467  #define JDF_RECOVERY 1
468  	unsigned int jd_jid;
469  	unsigned int jd_blocks;
470  	int jd_recover_error;
471  };
472  
473  struct gfs2_statfs_change_host {
474  	s64 sc_total;
475  	s64 sc_free;
476  	s64 sc_dinodes;
477  };
478  
479  #define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
480  #define GFS2_QUOTA_OFF		0
481  #define GFS2_QUOTA_ACCOUNT	1
482  #define GFS2_QUOTA_ON		2
483  
484  #define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
485  #define GFS2_DATA_WRITEBACK	1
486  #define GFS2_DATA_ORDERED	2
487  
488  #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
489  #define GFS2_ERRORS_WITHDRAW    0
490  #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
491  #define GFS2_ERRORS_RO          2 /* place holder for future feature */
492  #define GFS2_ERRORS_PANIC       3
493  
494  struct gfs2_args {
495  	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
496  	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
497  	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
498  	unsigned int ar_spectator:1;		/* Don't get a journal */
499  	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
500  	unsigned int ar_debug:1;		/* Oops on errors */
501  	unsigned int ar_posix_acl:1;		/* Enable posix acls */
502  	unsigned int ar_quota:2;		/* off/account/on */
503  	unsigned int ar_suiddir:1;		/* suiddir support */
504  	unsigned int ar_data:2;			/* ordered/writeback */
505  	unsigned int ar_meta:1;			/* mount metafs */
506  	unsigned int ar_discard:1;		/* discard requests */
507  	unsigned int ar_errors:2;               /* errors=withdraw | panic */
508  	unsigned int ar_nobarrier:1;            /* do not send barriers */
509  	unsigned int ar_rgrplvb:1;		/* use lvbs for rgrp info */
510  	int ar_commit;				/* Commit interval */
511  	int ar_statfs_quantum;			/* The fast statfs interval */
512  	int ar_quota_quantum;			/* The quota interval */
513  	int ar_statfs_percent;			/* The % change to force sync */
514  };
515  
516  struct gfs2_tune {
517  	spinlock_t gt_spin;
518  
519  	unsigned int gt_logd_secs;
520  
521  	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
522  	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
523  	unsigned int gt_quota_scale_num; /* Numerator */
524  	unsigned int gt_quota_scale_den; /* Denominator */
525  	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
526  	unsigned int gt_new_files_jdata;
527  	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
528  	unsigned int gt_complain_secs;
529  	unsigned int gt_statfs_quantum;
530  	unsigned int gt_statfs_slow;
531  };
532  
533  enum {
534  	SDF_JOURNAL_CHECKED	= 0,
535  	SDF_JOURNAL_LIVE	= 1,
536  	SDF_SHUTDOWN		= 2,
537  	SDF_NOBARRIERS		= 3,
538  	SDF_NORECOVERY		= 4,
539  	SDF_DEMOTE		= 5,
540  	SDF_NOJOURNALID		= 6,
541  	SDF_RORECOVERY		= 7, /* read only recovery */
542  };
543  
544  #define GFS2_FSNAME_LEN		256
545  
546  struct gfs2_inum_host {
547  	u64 no_formal_ino;
548  	u64 no_addr;
549  };
550  
551  struct gfs2_sb_host {
552  	u32 sb_magic;
553  	u32 sb_type;
554  	u32 sb_format;
555  
556  	u32 sb_fs_format;
557  	u32 sb_multihost_format;
558  	u32 sb_bsize;
559  	u32 sb_bsize_shift;
560  
561  	struct gfs2_inum_host sb_master_dir;
562  	struct gfs2_inum_host sb_root_dir;
563  
564  	char sb_lockproto[GFS2_LOCKNAME_LEN];
565  	char sb_locktable[GFS2_LOCKNAME_LEN];
566  };
567  
568  /*
569   * lm_mount() return values
570   *
571   * ls_jid - the journal ID this node should use
572   * ls_first - this node is the first to mount the file system
573   * ls_lockspace - lock module's context for this file system
574   * ls_ops - lock module's functions
575   */
576  
577  struct lm_lockstruct {
578  	int ls_jid;
579  	unsigned int ls_first;
580  	const struct lm_lockops *ls_ops;
581  	dlm_lockspace_t *ls_dlm;
582  
583  	int ls_recover_jid_done;   /* These two are deprecated, */
584  	int ls_recover_jid_status; /* used previously by gfs_controld */
585  
586  	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
587  	struct dlm_lksb ls_control_lksb; /* control_lock */
588  	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
589  	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
590  
591  	spinlock_t ls_recover_spin; /* protects following fields */
592  	unsigned long ls_recover_flags; /* DFL_ */
593  	uint32_t ls_recover_mount; /* gen in first recover_done cb */
594  	uint32_t ls_recover_start; /* gen in last recover_done cb */
595  	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
596  	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
597  	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
598  	uint32_t *ls_recover_result; /* result of last jid recovery */
599  };
600  
601  struct gfs2_pcpu_lkstats {
602  	/* One struct for each glock type */
603  	struct gfs2_lkstats lkstats[10];
604  };
605  
606  struct gfs2_sbd {
607  	struct super_block *sd_vfs;
608  	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
609  	struct kobject sd_kobj;
610  	unsigned long sd_flags;	/* SDF_... */
611  	struct gfs2_sb_host sd_sb;
612  
613  	/* Constants computed on mount */
614  
615  	u32 sd_fsb2bb;
616  	u32 sd_fsb2bb_shift;
617  	u32 sd_diptrs;	/* Number of pointers in a dinode */
618  	u32 sd_inptrs;	/* Number of pointers in a indirect block */
619  	u32 sd_jbsize;	/* Size of a journaled data block */
620  	u32 sd_hash_bsize;	/* sizeof(exhash block) */
621  	u32 sd_hash_bsize_shift;
622  	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
623  	u32 sd_qc_per_block;
624  	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
625  	u32 sd_max_height;	/* Max height of a file's metadata tree */
626  	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
627  	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
628  	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
629  
630  	struct gfs2_args sd_args;	/* Mount arguments */
631  	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
632  
633  	/* Lock Stuff */
634  
635  	struct lm_lockstruct sd_lockstruct;
636  	struct gfs2_holder sd_live_gh;
637  	struct gfs2_glock *sd_rename_gl;
638  	struct gfs2_glock *sd_trans_gl;
639  	wait_queue_head_t sd_glock_wait;
640  	atomic_t sd_glock_disposal;
641  	struct completion sd_locking_init;
642  	struct delayed_work sd_control_work;
643  
644  	/* Inode Stuff */
645  
646  	struct dentry *sd_master_dir;
647  	struct dentry *sd_root_dir;
648  
649  	struct inode *sd_jindex;
650  	struct inode *sd_statfs_inode;
651  	struct inode *sd_sc_inode;
652  	struct inode *sd_qc_inode;
653  	struct inode *sd_rindex;
654  	struct inode *sd_quota_inode;
655  
656  	/* StatFS stuff */
657  
658  	spinlock_t sd_statfs_spin;
659  	struct gfs2_statfs_change_host sd_statfs_master;
660  	struct gfs2_statfs_change_host sd_statfs_local;
661  	int sd_statfs_force_sync;
662  
663  	/* Resource group stuff */
664  
665  	int sd_rindex_uptodate;
666  	spinlock_t sd_rindex_spin;
667  	struct rb_root sd_rindex_tree;
668  	unsigned int sd_rgrps;
669  	unsigned int sd_max_rg_data;
670  
671  	/* Journal index stuff */
672  
673  	struct list_head sd_jindex_list;
674  	spinlock_t sd_jindex_spin;
675  	struct mutex sd_jindex_mutex;
676  	unsigned int sd_journals;
677  
678  	struct gfs2_jdesc *sd_jdesc;
679  	struct gfs2_holder sd_journal_gh;
680  	struct gfs2_holder sd_jinode_gh;
681  
682  	struct gfs2_holder sd_sc_gh;
683  	struct gfs2_holder sd_qc_gh;
684  
685  	/* Daemon stuff */
686  
687  	struct task_struct *sd_logd_process;
688  	struct task_struct *sd_quotad_process;
689  
690  	/* Quota stuff */
691  
692  	struct list_head sd_quota_list;
693  	atomic_t sd_quota_count;
694  	struct mutex sd_quota_mutex;
695  	wait_queue_head_t sd_quota_wait;
696  	struct list_head sd_trunc_list;
697  	spinlock_t sd_trunc_lock;
698  
699  	unsigned int sd_quota_slots;
700  	unsigned int sd_quota_chunks;
701  	unsigned char **sd_quota_bitmap;
702  
703  	u64 sd_quota_sync_gen;
704  
705  	/* Log stuff */
706  
707  	spinlock_t sd_log_lock;
708  
709  	unsigned int sd_log_blks_reserved;
710  	unsigned int sd_log_commited_buf;
711  	unsigned int sd_log_commited_databuf;
712  	int sd_log_commited_revoke;
713  
714  	atomic_t sd_log_pinned;
715  	unsigned int sd_log_num_buf;
716  	unsigned int sd_log_num_revoke;
717  	unsigned int sd_log_num_rg;
718  	unsigned int sd_log_num_databuf;
719  
720  	struct list_head sd_log_le_buf;
721  	struct list_head sd_log_le_revoke;
722  	struct list_head sd_log_le_databuf;
723  	struct list_head sd_log_le_ordered;
724  
725  	atomic_t sd_log_thresh1;
726  	atomic_t sd_log_thresh2;
727  	atomic_t sd_log_blks_free;
728  	wait_queue_head_t sd_log_waitq;
729  	wait_queue_head_t sd_logd_waitq;
730  
731  	u64 sd_log_sequence;
732  	unsigned int sd_log_head;
733  	unsigned int sd_log_tail;
734  	int sd_log_idle;
735  
736  	struct rw_semaphore sd_log_flush_lock;
737  	atomic_t sd_log_in_flight;
738  	struct bio *sd_log_bio;
739  	wait_queue_head_t sd_log_flush_wait;
740  	int sd_log_error;
741  
742  	unsigned int sd_log_flush_head;
743  	u64 sd_log_flush_wrapped;
744  
745  	spinlock_t sd_ail_lock;
746  	struct list_head sd_ail1_list;
747  	struct list_head sd_ail2_list;
748  
749  	/* Replay stuff */
750  
751  	struct list_head sd_revoke_list;
752  	unsigned int sd_replay_tail;
753  
754  	unsigned int sd_found_blocks;
755  	unsigned int sd_found_revokes;
756  	unsigned int sd_replayed_blocks;
757  
758  	/* For quiescing the filesystem */
759  
760  	struct gfs2_holder sd_freeze_gh;
761  	struct mutex sd_freeze_lock;
762  	unsigned int sd_freeze_count;
763  
764  	char sd_fsname[GFS2_FSNAME_LEN];
765  	char sd_table_name[GFS2_FSNAME_LEN];
766  	char sd_proto_name[GFS2_FSNAME_LEN];
767  
768  	/* Debugging crud */
769  
770  	unsigned long sd_last_warning;
771  	struct dentry *debugfs_dir;    /* debugfs directory */
772  	struct dentry *debugfs_dentry_glocks;
773  	struct dentry *debugfs_dentry_glstats;
774  	struct dentry *debugfs_dentry_sbstats;
775  };
776  
777  static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
778  {
779  	gl->gl_stats.stats[which]++;
780  }
781  
782  static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
783  {
784  	const struct gfs2_sbd *sdp = gl->gl_sbd;
785  	preempt_disable();
786  	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
787  	preempt_enable();
788  }
789  
790  #endif /* __INCORE_DOT_H__ */
791  
792