xref: /openbmc/linux/fs/gfs2/incore.h (revision aa6159ab)
1  /* SPDX-License-Identifier: GPL-2.0-only */
2  /*
3   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
4   * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
5   */
6  
7  #ifndef __INCORE_DOT_H__
8  #define __INCORE_DOT_H__
9  
10  #include <linux/fs.h>
11  #include <linux/kobject.h>
12  #include <linux/workqueue.h>
13  #include <linux/dlm.h>
14  #include <linux/buffer_head.h>
15  #include <linux/rcupdate.h>
16  #include <linux/rculist_bl.h>
17  #include <linux/completion.h>
18  #include <linux/rbtree.h>
19  #include <linux/ktime.h>
20  #include <linux/percpu.h>
21  #include <linux/lockref.h>
22  #include <linux/rhashtable.h>
23  
24  #define DIO_WAIT	0x00000010
25  #define DIO_METADATA	0x00000020
26  
27  struct gfs2_log_operations;
28  struct gfs2_bufdata;
29  struct gfs2_holder;
30  struct gfs2_glock;
31  struct gfs2_quota_data;
32  struct gfs2_trans;
33  struct gfs2_jdesc;
34  struct gfs2_sbd;
35  struct lm_lockops;
36  
37  typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
38  
39  struct gfs2_log_header_host {
40  	u64 lh_sequence;	/* Sequence number of this transaction */
41  	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
42  	u32 lh_tail;		/* Block number of log tail */
43  	u32 lh_blkno;
44  
45  	s64 lh_local_total;
46  	s64 lh_local_free;
47  	s64 lh_local_dinodes;
48  };
49  
50  /*
51   * Structure of operations that are associated with each
52   * type of element in the log.
53   */
54  
55  struct gfs2_log_operations {
56  	void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
57  	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
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  /**
70   * Clone bitmaps (bi_clone):
71   *
72   * - When a block is freed, we remember the previous state of the block in the
73   *   clone bitmap, and only mark the block as free in the real bitmap.
74   *
75   * - When looking for a block to allocate, we check for a free block in the
76   *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
77   *
78   * - For allocating a block, we mark it as allocated in the real bitmap, and if
79   *   a clone bitmap exists, also in the clone bitmap.
80   *
81   * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
82   *   to make the clone bitmap reflect the current allocation state.
83   *   (Alternatively, we could remove the clone bitmap.)
84   *
85   * The clone bitmaps are in-core only, and is never written to disk.
86   *
87   * These steps ensure that blocks which have been freed in a transaction cannot
88   * be reallocated in that same transaction.
89   */
90  struct gfs2_bitmap {
91  	struct buffer_head *bi_bh;
92  	char *bi_clone;
93  	unsigned long bi_flags;
94  	u32 bi_offset;
95  	u32 bi_start;
96  	u32 bi_bytes;
97  	u32 bi_blocks;
98  };
99  
100  struct gfs2_rgrpd {
101  	struct rb_node rd_node;		/* Link with superblock */
102  	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
103  	u64 rd_addr;			/* grp block disk address */
104  	u64 rd_data0;			/* first data location */
105  	u32 rd_length;			/* length of rgrp header in fs blocks */
106  	u32 rd_data;			/* num of data blocks in rgrp */
107  	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
108  	u32 rd_free;
109  	u32 rd_reserved;                /* number of blocks reserved */
110  	u32 rd_free_clone;
111  	u32 rd_dinodes;
112  	u64 rd_igeneration;
113  	struct gfs2_bitmap *rd_bits;
114  	struct gfs2_sbd *rd_sbd;
115  	struct gfs2_rgrp_lvb *rd_rgl;
116  	u32 rd_last_alloc;
117  	u32 rd_flags;
118  	u32 rd_extfail_pt;		/* extent failure point */
119  #define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
120  #define GFS2_RDF_UPTODATE	0x20000000 /* rg is up to date */
121  #define GFS2_RDF_ERROR		0x40000000 /* error in rg */
122  #define GFS2_RDF_PREFERRED	0x80000000 /* This rgrp is preferred */
123  #define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */
124  	spinlock_t rd_rsspin;           /* protects reservation related vars */
125  	struct rb_root rd_rstree;       /* multi-block reservation tree */
126  };
127  
128  struct gfs2_rbm {
129  	struct gfs2_rgrpd *rgd;
130  	u32 offset;		/* The offset is bitmap relative */
131  	int bii;		/* Bitmap index */
132  };
133  
134  static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
135  {
136  	return rbm->rgd->rd_bits + rbm->bii;
137  }
138  
139  static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
140  {
141  	BUG_ON(rbm->offset >= rbm->rgd->rd_data);
142  	return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
143  		rbm->offset;
144  }
145  
146  static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
147  			       const struct gfs2_rbm *rbm2)
148  {
149  	return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
150  	       (rbm1->offset == rbm2->offset);
151  }
152  
153  enum gfs2_state_bits {
154  	BH_Pinned = BH_PrivateStart,
155  	BH_Escaped = BH_PrivateStart + 1,
156  };
157  
158  BUFFER_FNS(Pinned, pinned)
159  TAS_BUFFER_FNS(Pinned, pinned)
160  BUFFER_FNS(Escaped, escaped)
161  TAS_BUFFER_FNS(Escaped, escaped)
162  
163  struct gfs2_bufdata {
164  	struct buffer_head *bd_bh;
165  	struct gfs2_glock *bd_gl;
166  	u64 bd_blkno;
167  
168  	struct list_head bd_list;
169  
170  	struct gfs2_trans *bd_tr;
171  	struct list_head bd_ail_st_list;
172  	struct list_head bd_ail_gl_list;
173  };
174  
175  /*
176   * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
177   * prefix of lock_dlm_ gets awkward.
178   */
179  
180  #define GDLM_STRNAME_BYTES	25
181  #define GDLM_LVB_SIZE		32
182  
183  /*
184   * ls_recover_flags:
185   *
186   * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
187   * held by failed nodes whose journals need recovery.  Those locks should
188   * only be used for journal recovery until the journal recovery is done.
189   * This is set by the dlm recover_prep callback and cleared by the
190   * gfs2_control thread when journal recovery is complete.  To avoid
191   * races between recover_prep setting and gfs2_control clearing, recover_spin
192   * is held while changing this bit and reading/writing recover_block
193   * and recover_start.
194   *
195   * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
196   *
197   * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
198   * recovery of all journals before allowing other nodes to mount the fs.
199   * This is cleared when FIRST_MOUNT_DONE is set.
200   *
201   * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
202   * recovery of all journals, and now allows other nodes to mount the fs.
203   *
204   * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
205   * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
206   * control clearing BLOCK_LOCKS for further recoveries.
207   *
208   * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
209   *
210   * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
211   * and recover_done(), i.e. set while recover_block == recover_start.
212   */
213  
214  enum {
215  	DFL_BLOCK_LOCKS		= 0,
216  	DFL_NO_DLM_OPS		= 1,
217  	DFL_FIRST_MOUNT		= 2,
218  	DFL_FIRST_MOUNT_DONE	= 3,
219  	DFL_MOUNT_DONE		= 4,
220  	DFL_UNMOUNT		= 5,
221  	DFL_DLM_RECOVERY	= 6,
222  };
223  
224  /*
225   * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
226   * the struct; padding at the end is fine.
227   */
228  struct lm_lockname {
229  	u64 ln_number;
230  	struct gfs2_sbd *ln_sbd;
231  	unsigned int ln_type;
232  };
233  
234  #define lm_name_equal(name1, name2) \
235          (((name1)->ln_number == (name2)->ln_number) &&	\
236  	 ((name1)->ln_type == (name2)->ln_type) &&	\
237  	 ((name1)->ln_sbd == (name2)->ln_sbd))
238  
239  
240  struct gfs2_glock_operations {
241  	int (*go_sync) (struct gfs2_glock *gl);
242  	int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
243  	void (*go_inval) (struct gfs2_glock *gl, int flags);
244  	int (*go_demote_ok) (const struct gfs2_glock *gl);
245  	int (*go_lock) (struct gfs2_holder *gh);
246  	void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl,
247  			const char *fs_id_buf);
248  	void (*go_callback)(struct gfs2_glock *gl, bool remote);
249  	void (*go_free)(struct gfs2_glock *gl);
250  	const int go_subclass;
251  	const int go_type;
252  	const unsigned long go_flags;
253  #define GLOF_ASPACE 1 /* address space attached */
254  #define GLOF_LVB    2 /* Lock Value Block attached */
255  #define GLOF_LRU    4 /* LRU managed */
256  #define GLOF_NONDISK   8 /* not I/O related */
257  };
258  
259  enum {
260  	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
261  	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
262  	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
263  	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
264  	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
265  	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
266  	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
267  	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
268  	GFS2_NR_LKSTATS
269  };
270  
271  struct gfs2_lkstats {
272  	u64 stats[GFS2_NR_LKSTATS];
273  };
274  
275  enum {
276  	/* States */
277  	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
278  	HIF_FIRST		= 7,
279  	HIF_WAIT		= 10,
280  };
281  
282  struct gfs2_holder {
283  	struct list_head gh_list;
284  
285  	struct gfs2_glock *gh_gl;
286  	struct pid *gh_owner_pid;
287  	u16 gh_flags;
288  	u16 gh_state;
289  
290  	int gh_error;
291  	unsigned long gh_iflags; /* HIF_... */
292  	unsigned long gh_ip;
293  };
294  
295  /* Number of quota types we support */
296  #define GFS2_MAXQUOTAS 2
297  
298  struct gfs2_qadata { /* quota allocation data */
299  	/* Quota stuff */
300  	struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
301  	struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
302  	unsigned int qa_qd_num;
303  	int qa_ref;
304  };
305  
306  /* Resource group multi-block reservation, in order of appearance:
307  
308     Step 1. Function prepares to write, allocates a mb, sets the size hint.
309     Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
310     Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
311     Step 4. Bits are assigned from the rgrp based on either the reservation
312             or wherever it can.
313  */
314  
315  struct gfs2_blkreserv {
316  	struct rb_node rs_node;       /* link to other block reservations */
317  	struct gfs2_rbm rs_rbm;       /* Start of reservation */
318  	u32 rs_free;                  /* how many blocks are still free */
319  };
320  
321  /*
322   * Allocation parameters
323   * @target: The number of blocks we'd ideally like to allocate
324   * @aflags: The flags (e.g. Orlov flag)
325   *
326   * The intent is to gradually expand this structure over time in
327   * order to give more information, e.g. alignment, min extent size
328   * to the allocation code.
329   */
330  struct gfs2_alloc_parms {
331  	u64 target;
332  	u32 min_target;
333  	u32 aflags;
334  	u64 allowed;
335  };
336  
337  enum {
338  	GLF_LOCK			= 1,
339  	GLF_DEMOTE			= 3,
340  	GLF_PENDING_DEMOTE		= 4,
341  	GLF_DEMOTE_IN_PROGRESS		= 5,
342  	GLF_DIRTY			= 6,
343  	GLF_LFLUSH			= 7,
344  	GLF_INVALIDATE_IN_PROGRESS	= 8,
345  	GLF_REPLY_PENDING		= 9,
346  	GLF_INITIAL			= 10,
347  	GLF_FROZEN			= 11,
348  	GLF_LRU				= 13,
349  	GLF_OBJECT			= 14, /* Used only for tracing */
350  	GLF_BLOCKING			= 15,
351  	GLF_INODE_CREATING		= 16, /* Inode creation occurring */
352  	GLF_PENDING_DELETE		= 17,
353  	GLF_FREEING			= 18, /* Wait for glock to be freed */
354  };
355  
356  struct gfs2_glock {
357  	unsigned long gl_flags;		/* GLF_... */
358  	struct lm_lockname gl_name;
359  
360  	struct lockref gl_lockref;
361  
362  	/* State fields protected by gl_lockref.lock */
363  	unsigned int gl_state:2,	/* Current state */
364  		     gl_target:2,	/* Target state */
365  		     gl_demote_state:2,	/* State requested by remote node */
366  		     gl_req:2,		/* State in last dlm request */
367  		     gl_reply:8;	/* Last reply from the dlm */
368  
369  	unsigned long gl_demote_time; /* time of first demote request */
370  	long gl_hold_time;
371  	struct list_head gl_holders;
372  
373  	const struct gfs2_glock_operations *gl_ops;
374  	ktime_t gl_dstamp;
375  	struct gfs2_lkstats gl_stats;
376  	struct dlm_lksb gl_lksb;
377  	unsigned long gl_tchange;
378  	void *gl_object;
379  
380  	struct list_head gl_lru;
381  	struct list_head gl_ail_list;
382  	atomic_t gl_ail_count;
383  	atomic_t gl_revokes;
384  	struct delayed_work gl_work;
385  	/* For iopen glocks only */
386  	struct {
387  		struct delayed_work gl_delete;
388  		u64 gl_no_formal_ino;
389  	};
390  	struct rcu_head gl_rcu;
391  	struct rhash_head gl_node;
392  };
393  
394  enum {
395  	GIF_INVALID		= 0,
396  	GIF_QD_LOCKED		= 1,
397  	GIF_ALLOC_FAILED	= 2,
398  	GIF_SW_PAGED		= 3,
399  	GIF_FREE_VFS_INODE      = 5,
400  	GIF_GLOP_PENDING	= 6,
401  	GIF_DEFERRED_DELETE	= 7,
402  };
403  
404  struct gfs2_inode {
405  	struct inode i_inode;
406  	u64 i_no_addr;
407  	u64 i_no_formal_ino;
408  	u64 i_generation;
409  	u64 i_eattr;
410  	unsigned long i_flags;		/* GIF_... */
411  	struct gfs2_glock *i_gl; /* Move into i_gh? */
412  	struct gfs2_holder i_iopen_gh;
413  	struct gfs2_holder i_gh; /* for prepare/commit_write only */
414  	struct gfs2_qadata *i_qadata; /* quota allocation data */
415  	struct gfs2_holder i_rgd_gh;
416  	struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
417  	u64 i_goal;	/* goal block for allocations */
418  	atomic_t i_sizehint;  /* hint of the write size */
419  	struct rw_semaphore i_rw_mutex;
420  	struct list_head i_ordered;
421  	struct list_head i_trunc_list;
422  	__be64 *i_hash_cache;
423  	u32 i_entries;
424  	u32 i_diskflags;
425  	u8 i_height;
426  	u8 i_depth;
427  	u16 i_rahead;
428  };
429  
430  /*
431   * Since i_inode is the first element of struct gfs2_inode,
432   * this is effectively a cast.
433   */
434  static inline struct gfs2_inode *GFS2_I(struct inode *inode)
435  {
436  	return container_of(inode, struct gfs2_inode, i_inode);
437  }
438  
439  static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
440  {
441  	return inode->i_sb->s_fs_info;
442  }
443  
444  struct gfs2_file {
445  	struct mutex f_fl_mutex;
446  	struct gfs2_holder f_fl_gh;
447  };
448  
449  struct gfs2_revoke_replay {
450  	struct list_head rr_list;
451  	u64 rr_blkno;
452  	unsigned int rr_where;
453  };
454  
455  enum {
456  	QDF_CHANGE		= 1,
457  	QDF_LOCKED		= 2,
458  	QDF_REFRESH		= 3,
459  	QDF_QMSG_QUIET          = 4,
460  };
461  
462  struct gfs2_quota_data {
463  	struct hlist_bl_node qd_hlist;
464  	struct list_head qd_list;
465  	struct kqid qd_id;
466  	struct gfs2_sbd *qd_sbd;
467  	struct lockref qd_lockref;
468  	struct list_head qd_lru;
469  	unsigned qd_hash;
470  
471  	unsigned long qd_flags;		/* QDF_... */
472  
473  	s64 qd_change;
474  	s64 qd_change_sync;
475  
476  	unsigned int qd_slot;
477  	unsigned int qd_slot_count;
478  
479  	struct buffer_head *qd_bh;
480  	struct gfs2_quota_change *qd_bh_qc;
481  	unsigned int qd_bh_count;
482  
483  	struct gfs2_glock *qd_gl;
484  	struct gfs2_quota_lvb qd_qb;
485  
486  	u64 qd_sync_gen;
487  	unsigned long qd_last_warn;
488  	struct rcu_head qd_rcu;
489  };
490  
491  enum {
492  	TR_TOUCHED = 1,
493  	TR_ATTACHED = 2,
494  	TR_ALLOCED = 3,
495  };
496  
497  struct gfs2_trans {
498  	unsigned long tr_ip;
499  
500  	unsigned int tr_blocks;
501  	unsigned int tr_revokes;
502  	unsigned int tr_reserved;
503  	unsigned long tr_flags;
504  
505  	unsigned int tr_num_buf_new;
506  	unsigned int tr_num_databuf_new;
507  	unsigned int tr_num_buf_rm;
508  	unsigned int tr_num_databuf_rm;
509  	unsigned int tr_num_revoke;
510  	unsigned int tr_num_revoke_rm;
511  
512  	struct list_head tr_list;
513  	struct list_head tr_databuf;
514  	struct list_head tr_buf;
515  
516  	unsigned int tr_first;
517  	struct list_head tr_ail1_list;
518  	struct list_head tr_ail2_list;
519  };
520  
521  struct gfs2_journal_extent {
522  	struct list_head list;
523  
524  	unsigned int lblock; /* First logical block */
525  	u64 dblock; /* First disk block */
526  	u64 blocks;
527  };
528  
529  struct gfs2_jdesc {
530  	struct list_head jd_list;
531  	struct list_head extent_list;
532  	unsigned int nr_extents;
533  	struct work_struct jd_work;
534  	struct inode *jd_inode;
535  	unsigned long jd_flags;
536  #define JDF_RECOVERY 1
537  	unsigned int jd_jid;
538  	u32 jd_blocks;
539  	int jd_recover_error;
540  	/* Replay stuff */
541  
542  	unsigned int jd_found_blocks;
543  	unsigned int jd_found_revokes;
544  	unsigned int jd_replayed_blocks;
545  
546  	struct list_head jd_revoke_list;
547  	unsigned int jd_replay_tail;
548  
549  	u64 jd_no_addr;
550  };
551  
552  struct gfs2_statfs_change_host {
553  	s64 sc_total;
554  	s64 sc_free;
555  	s64 sc_dinodes;
556  };
557  
558  #define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
559  #define GFS2_QUOTA_OFF		0
560  #define GFS2_QUOTA_ACCOUNT	1
561  #define GFS2_QUOTA_ON		2
562  
563  #define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
564  #define GFS2_DATA_WRITEBACK	1
565  #define GFS2_DATA_ORDERED	2
566  
567  #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
568  #define GFS2_ERRORS_WITHDRAW    0
569  #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
570  #define GFS2_ERRORS_RO          2 /* place holder for future feature */
571  #define GFS2_ERRORS_PANIC       3
572  
573  struct gfs2_args {
574  	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
575  	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
576  	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
577  	unsigned int ar_spectator:1;		/* Don't get a journal */
578  	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
579  	unsigned int ar_debug:1;		/* Oops on errors */
580  	unsigned int ar_posix_acl:1;		/* Enable posix acls */
581  	unsigned int ar_quota:2;		/* off/account/on */
582  	unsigned int ar_suiddir:1;		/* suiddir support */
583  	unsigned int ar_data:2;			/* ordered/writeback */
584  	unsigned int ar_meta:1;			/* mount metafs */
585  	unsigned int ar_discard:1;		/* discard requests */
586  	unsigned int ar_errors:2;               /* errors=withdraw | panic */
587  	unsigned int ar_nobarrier:1;            /* do not send barriers */
588  	unsigned int ar_rgrplvb:1;		/* use lvbs for rgrp info */
589  	unsigned int ar_loccookie:1;		/* use location based readdir
590  						   cookies */
591  	s32 ar_commit;				/* Commit interval */
592  	s32 ar_statfs_quantum;			/* The fast statfs interval */
593  	s32 ar_quota_quantum;			/* The quota interval */
594  	s32 ar_statfs_percent;			/* The % change to force sync */
595  };
596  
597  struct gfs2_tune {
598  	spinlock_t gt_spin;
599  
600  	unsigned int gt_logd_secs;
601  
602  	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
603  	unsigned int gt_quota_scale_num; /* Numerator */
604  	unsigned int gt_quota_scale_den; /* Denominator */
605  	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
606  	unsigned int gt_new_files_jdata;
607  	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
608  	unsigned int gt_complain_secs;
609  	unsigned int gt_statfs_quantum;
610  	unsigned int gt_statfs_slow;
611  };
612  
613  enum {
614  	SDF_JOURNAL_CHECKED	= 0,
615  	SDF_JOURNAL_LIVE	= 1,
616  	SDF_WITHDRAWN		= 2,
617  	SDF_NOBARRIERS		= 3,
618  	SDF_NORECOVERY		= 4,
619  	SDF_DEMOTE		= 5,
620  	SDF_NOJOURNALID		= 6,
621  	SDF_RORECOVERY		= 7, /* read only recovery */
622  	SDF_SKIP_DLM_UNLOCK	= 8,
623  	SDF_FORCE_AIL_FLUSH     = 9,
624  	SDF_FS_FROZEN           = 10,
625  	SDF_WITHDRAWING		= 11, /* Will withdraw eventually */
626  	SDF_WITHDRAW_IN_PROG	= 12, /* Withdraw is in progress */
627  	SDF_REMOTE_WITHDRAW	= 13, /* Performing remote recovery */
628  	SDF_WITHDRAW_RECOVERY	= 14, /* Wait for journal recovery when we are
629  					 withdrawing */
630  };
631  
632  enum gfs2_freeze_state {
633  	SFS_UNFROZEN		= 0,
634  	SFS_STARTING_FREEZE	= 1,
635  	SFS_FROZEN		= 2,
636  };
637  
638  #define GFS2_FSNAME_LEN		256
639  
640  struct gfs2_inum_host {
641  	u64 no_formal_ino;
642  	u64 no_addr;
643  };
644  
645  struct gfs2_sb_host {
646  	u32 sb_magic;
647  	u32 sb_type;
648  	u32 sb_format;
649  
650  	u32 sb_fs_format;
651  	u32 sb_multihost_format;
652  	u32 sb_bsize;
653  	u32 sb_bsize_shift;
654  
655  	struct gfs2_inum_host sb_master_dir;
656  	struct gfs2_inum_host sb_root_dir;
657  
658  	char sb_lockproto[GFS2_LOCKNAME_LEN];
659  	char sb_locktable[GFS2_LOCKNAME_LEN];
660  };
661  
662  /*
663   * lm_mount() return values
664   *
665   * ls_jid - the journal ID this node should use
666   * ls_first - this node is the first to mount the file system
667   * ls_lockspace - lock module's context for this file system
668   * ls_ops - lock module's functions
669   */
670  
671  struct lm_lockstruct {
672  	int ls_jid;
673  	unsigned int ls_first;
674  	const struct lm_lockops *ls_ops;
675  	dlm_lockspace_t *ls_dlm;
676  
677  	int ls_recover_jid_done;   /* These two are deprecated, */
678  	int ls_recover_jid_status; /* used previously by gfs_controld */
679  
680  	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
681  	struct dlm_lksb ls_control_lksb; /* control_lock */
682  	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
683  	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
684  	char *ls_lvb_bits;
685  
686  	spinlock_t ls_recover_spin; /* protects following fields */
687  	unsigned long ls_recover_flags; /* DFL_ */
688  	uint32_t ls_recover_mount; /* gen in first recover_done cb */
689  	uint32_t ls_recover_start; /* gen in last recover_done cb */
690  	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
691  	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
692  	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
693  	uint32_t *ls_recover_result; /* result of last jid recovery */
694  };
695  
696  struct gfs2_pcpu_lkstats {
697  	/* One struct for each glock type */
698  	struct gfs2_lkstats lkstats[10];
699  };
700  
701  /* List of local (per node) statfs inodes */
702  struct local_statfs_inode {
703  	struct list_head si_list;
704  	struct inode *si_sc_inode;
705  	unsigned int si_jid; /* journal id this statfs inode corresponds to */
706  };
707  
708  struct gfs2_sbd {
709  	struct super_block *sd_vfs;
710  	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
711  	struct kobject sd_kobj;
712  	struct completion sd_kobj_unregister;
713  	unsigned long sd_flags;	/* SDF_... */
714  	struct gfs2_sb_host sd_sb;
715  
716  	/* Constants computed on mount */
717  
718  	u32 sd_fsb2bb;
719  	u32 sd_fsb2bb_shift;
720  	u32 sd_diptrs;	/* Number of pointers in a dinode */
721  	u32 sd_inptrs;	/* Number of pointers in a indirect block */
722  	u32 sd_ldptrs;  /* Number of pointers in a log descriptor block */
723  	u32 sd_jbsize;	/* Size of a journaled data block */
724  	u32 sd_hash_bsize;	/* sizeof(exhash block) */
725  	u32 sd_hash_bsize_shift;
726  	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
727  	u32 sd_qc_per_block;
728  	u32 sd_blocks_per_bitmap;
729  	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
730  	u32 sd_max_height;	/* Max height of a file's metadata tree */
731  	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
732  	u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
733  
734  	struct gfs2_args sd_args;	/* Mount arguments */
735  	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
736  
737  	/* Lock Stuff */
738  
739  	struct lm_lockstruct sd_lockstruct;
740  	struct gfs2_holder sd_live_gh;
741  	struct gfs2_glock *sd_rename_gl;
742  	struct gfs2_glock *sd_freeze_gl;
743  	struct work_struct sd_freeze_work;
744  	wait_queue_head_t sd_glock_wait;
745  	wait_queue_head_t sd_async_glock_wait;
746  	atomic_t sd_glock_disposal;
747  	struct completion sd_locking_init;
748  	struct completion sd_wdack;
749  	struct delayed_work sd_control_work;
750  
751  	/* Inode Stuff */
752  
753  	struct dentry *sd_master_dir;
754  	struct dentry *sd_root_dir;
755  
756  	struct inode *sd_jindex;
757  	struct inode *sd_statfs_inode;
758  	struct inode *sd_sc_inode;
759  	struct list_head sd_sc_inodes_list;
760  	struct inode *sd_qc_inode;
761  	struct inode *sd_rindex;
762  	struct inode *sd_quota_inode;
763  
764  	/* StatFS stuff */
765  
766  	spinlock_t sd_statfs_spin;
767  	struct gfs2_statfs_change_host sd_statfs_master;
768  	struct gfs2_statfs_change_host sd_statfs_local;
769  	int sd_statfs_force_sync;
770  
771  	/* Resource group stuff */
772  
773  	int sd_rindex_uptodate;
774  	spinlock_t sd_rindex_spin;
775  	struct rb_root sd_rindex_tree;
776  	unsigned int sd_rgrps;
777  	unsigned int sd_max_rg_data;
778  
779  	/* Journal index stuff */
780  
781  	struct list_head sd_jindex_list;
782  	spinlock_t sd_jindex_spin;
783  	struct mutex sd_jindex_mutex;
784  	unsigned int sd_journals;
785  
786  	struct gfs2_jdesc *sd_jdesc;
787  	struct gfs2_holder sd_journal_gh;
788  	struct gfs2_holder sd_jinode_gh;
789  	struct gfs2_glock *sd_jinode_gl;
790  
791  	struct gfs2_holder sd_sc_gh;
792  	struct gfs2_holder sd_qc_gh;
793  
794  	struct completion sd_journal_ready;
795  
796  	/* Daemon stuff */
797  
798  	struct task_struct *sd_logd_process;
799  	struct task_struct *sd_quotad_process;
800  
801  	/* Quota stuff */
802  
803  	struct list_head sd_quota_list;
804  	atomic_t sd_quota_count;
805  	struct mutex sd_quota_mutex;
806  	struct mutex sd_quota_sync_mutex;
807  	wait_queue_head_t sd_quota_wait;
808  	struct list_head sd_trunc_list;
809  	spinlock_t sd_trunc_lock;
810  
811  	unsigned int sd_quota_slots;
812  	unsigned long *sd_quota_bitmap;
813  	spinlock_t sd_bitmap_lock;
814  
815  	u64 sd_quota_sync_gen;
816  
817  	/* Log stuff */
818  
819  	struct address_space sd_aspace;
820  
821  	spinlock_t sd_log_lock;
822  
823  	struct gfs2_trans *sd_log_tr;
824  	unsigned int sd_log_blks_reserved;
825  	int sd_log_committed_revoke;
826  
827  	atomic_t sd_log_pinned;
828  	unsigned int sd_log_num_revoke;
829  
830  	struct list_head sd_log_revokes;
831  	struct list_head sd_log_ordered;
832  	spinlock_t sd_ordered_lock;
833  
834  	atomic_t sd_log_thresh1;
835  	atomic_t sd_log_thresh2;
836  	atomic_t sd_log_blks_free;
837  	atomic_t sd_log_blks_needed;
838  	wait_queue_head_t sd_log_waitq;
839  	wait_queue_head_t sd_logd_waitq;
840  
841  	u64 sd_log_sequence;
842  	unsigned int sd_log_head;
843  	unsigned int sd_log_tail;
844  	int sd_log_idle;
845  
846  	struct rw_semaphore sd_log_flush_lock;
847  	atomic_t sd_log_in_flight;
848  	struct bio *sd_log_bio;
849  	wait_queue_head_t sd_log_flush_wait;
850  	int sd_log_error; /* First log error */
851  	wait_queue_head_t sd_withdraw_wait;
852  
853  	atomic_t sd_reserving_log;
854  	wait_queue_head_t sd_reserving_log_wait;
855  
856  	unsigned int sd_log_flush_head;
857  
858  	spinlock_t sd_ail_lock;
859  	struct list_head sd_ail1_list;
860  	struct list_head sd_ail2_list;
861  
862  	/* For quiescing the filesystem */
863  	struct gfs2_holder sd_freeze_gh;
864  	atomic_t sd_freeze_state;
865  	struct mutex sd_freeze_mutex;
866  
867  	char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
868  	char sd_table_name[GFS2_FSNAME_LEN];
869  	char sd_proto_name[GFS2_FSNAME_LEN];
870  
871  	/* Debugging crud */
872  
873  	unsigned long sd_last_warning;
874  	struct dentry *debugfs_dir;    /* debugfs directory */
875  	unsigned long sd_glock_dqs_held;
876  };
877  
878  static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
879  {
880  	gl->gl_stats.stats[which]++;
881  }
882  
883  static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
884  {
885  	const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
886  	preempt_disable();
887  	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
888  	preempt_enable();
889  }
890  
891  extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
892  
893  static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
894  {
895  	return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
896  }
897  
898  #endif /* __INCORE_DOT_H__ */
899  
900