xref: /linux/fs/gfs2/incore.h (revision ef479de65a700437159d59c00ee5cad6cfc2a89d)
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  #include <linux/mutex.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_jdesc;
35  struct gfs2_sbd;
36  struct lm_lockops;
37  
38  typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
39  
40  struct gfs2_log_header_host {
41  	u64 lh_sequence;	/* Sequence number of this transaction */
42  	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
43  	u32 lh_tail;		/* Block number of log tail */
44  	u32 lh_blkno;
45  
46  	s64 lh_local_total;
47  	s64 lh_local_free;
48  	s64 lh_local_dinodes;
49  };
50  
51  /*
52   * Structure of operations that are associated with each
53   * type of element in the log.
54   */
55  
56  struct gfs2_log_operations {
57  	void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
58  	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
59  	void (*lo_before_scan) (struct gfs2_jdesc *jd,
60  				struct gfs2_log_header_host *head, int pass);
61  	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
62  				 struct gfs2_log_descriptor *ld, __be64 *ptr,
63  				 int pass);
64  	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
65  	const char *lo_name;
66  };
67  
68  #define GBF_FULL 1
69  
70  /**
71   * Clone bitmaps (bi_clone):
72   *
73   * - When a block is freed, we remember the previous state of the block in the
74   *   clone bitmap, and only mark the block as free in the real bitmap.
75   *
76   * - When looking for a block to allocate, we check for a free block in the
77   *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
78   *
79   * - For allocating a block, we mark it as allocated in the real bitmap, and if
80   *   a clone bitmap exists, also in the clone bitmap.
81   *
82   * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
83   *   to make the clone bitmap reflect the current allocation state.
84   *   (Alternatively, we could remove the clone bitmap.)
85   *
86   * The clone bitmaps are in-core only, and is never written to disk.
87   *
88   * These steps ensure that blocks which have been freed in a transaction cannot
89   * be reallocated in that same transaction.
90   */
91  struct gfs2_bitmap {
92  	struct buffer_head *bi_bh;
93  	char *bi_clone;
94  	unsigned long bi_flags;
95  	u32 bi_offset;
96  	u32 bi_start;
97  	u32 bi_bytes;
98  	u32 bi_blocks;
99  };
100  
101  struct gfs2_rgrpd {
102  	struct rb_node rd_node;		/* Link with superblock */
103  	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
104  	u64 rd_addr;			/* grp block disk address */
105  	u64 rd_data0;			/* first data location */
106  	u32 rd_length;			/* length of rgrp header in fs blocks */
107  	u32 rd_data;			/* num of data blocks in rgrp */
108  	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
109  	u32 rd_free;
110  	u32 rd_requested;		/* number of blocks in rd_rstree */
111  	u32 rd_reserved;		/* number of reserved blocks */
112  	u32 rd_free_clone;
113  	u32 rd_dinodes;
114  	u64 rd_igeneration;
115  	struct gfs2_bitmap *rd_bits;
116  	struct gfs2_sbd *rd_sbd;
117  	struct gfs2_rgrp_lvb *rd_rgl;
118  	u32 rd_last_alloc;
119  	u32 rd_flags;
120  	u32 rd_extfail_pt;		/* extent failure point */
121  #define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
122  #define GFS2_RDF_ERROR		0x40000000 /* error in rg */
123  #define GFS2_RDF_PREFERRED	0x80000000 /* This rgrp is preferred */
124  #define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */
125  	spinlock_t rd_rsspin;           /* protects reservation related vars */
126  	struct mutex rd_mutex;
127  	struct rb_root rd_rstree;       /* multi-block reservation tree */
128  };
129  
130  enum gfs2_state_bits {
131  	BH_Pinned = BH_PrivateStart,
132  	BH_Escaped = BH_PrivateStart + 1,
133  };
134  
135  BUFFER_FNS(Pinned, pinned)
136  TAS_BUFFER_FNS(Pinned, pinned)
137  BUFFER_FNS(Escaped, escaped)
138  TAS_BUFFER_FNS(Escaped, escaped)
139  
140  struct gfs2_bufdata {
141  	struct buffer_head *bd_bh;
142  	struct gfs2_glock *bd_gl;
143  	u64 bd_blkno;
144  
145  	struct list_head bd_list;
146  
147  	struct gfs2_trans *bd_tr;
148  	struct list_head bd_ail_st_list;
149  	struct list_head bd_ail_gl_list;
150  };
151  
152  /*
153   * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
154   * prefix of lock_dlm_ gets awkward.
155   */
156  
157  #define GDLM_STRNAME_BYTES	25
158  #define GDLM_LVB_SIZE		32
159  
160  /*
161   * ls_recover_flags:
162   *
163   * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
164   * held by failed nodes whose journals need recovery.  Those locks should
165   * only be used for journal recovery until the journal recovery is done.
166   * This is set by the dlm recover_prep callback and cleared by the
167   * gfs2_control thread when journal recovery is complete.  To avoid
168   * races between recover_prep setting and gfs2_control clearing, recover_spin
169   * is held while changing this bit and reading/writing recover_block
170   * and recover_start.
171   *
172   * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
173   *
174   * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
175   * recovery of all journals before allowing other nodes to mount the fs.
176   * This is cleared when FIRST_MOUNT_DONE is set.
177   *
178   * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
179   * recovery of all journals, and now allows other nodes to mount the fs.
180   *
181   * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
182   * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
183   * control clearing BLOCK_LOCKS for further recoveries.
184   *
185   * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
186   *
187   * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
188   * and recover_done(), i.e. set while recover_block == recover_start.
189   */
190  
191  enum {
192  	DFL_BLOCK_LOCKS		= 0,
193  	DFL_NO_DLM_OPS		= 1,
194  	DFL_FIRST_MOUNT		= 2,
195  	DFL_FIRST_MOUNT_DONE	= 3,
196  	DFL_MOUNT_DONE		= 4,
197  	DFL_UNMOUNT		= 5,
198  	DFL_DLM_RECOVERY	= 6,
199  };
200  
201  /*
202   * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
203   * the struct; padding at the end is fine.
204   */
205  struct lm_lockname {
206  	u64 ln_number;
207  	struct gfs2_sbd *ln_sbd;
208  	unsigned int ln_type;
209  };
210  
211  #define lm_name_equal(name1, name2) \
212          (((name1)->ln_number == (name2)->ln_number) &&	\
213  	 ((name1)->ln_type == (name2)->ln_type) &&	\
214  	 ((name1)->ln_sbd == (name2)->ln_sbd))
215  
216  
217  struct gfs2_glock_operations {
218  	int (*go_sync) (struct gfs2_glock *gl);
219  	int (*go_xmote_bh)(struct gfs2_glock *gl);
220  	void (*go_inval) (struct gfs2_glock *gl, int flags);
221  	int (*go_instantiate) (struct gfs2_glock *gl);
222  	int (*go_held)(struct gfs2_holder *gh);
223  	void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl,
224  			const char *fs_id_buf);
225  	void (*go_callback)(struct gfs2_glock *gl, bool remote);
226  	void (*go_unlocked)(struct gfs2_glock *gl);
227  	const int go_subclass;
228  	const int go_type;
229  	const unsigned long go_flags;
230  #define GLOF_ASPACE 1 /* address space attached */
231  #define GLOF_LVB    2 /* Lock Value Block attached */
232  #define GLOF_NONDISK   8 /* not I/O related */
233  };
234  
235  enum {
236  	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
237  	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
238  	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
239  	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
240  	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
241  	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
242  	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
243  	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
244  	GFS2_NR_LKSTATS
245  };
246  
247  struct gfs2_lkstats {
248  	u64 stats[GFS2_NR_LKSTATS];
249  };
250  
251  enum {
252  	/* States */
253  	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
254  	HIF_WAIT		= 10,
255  };
256  
257  struct gfs2_holder {
258  	struct list_head gh_list;
259  
260  	struct gfs2_glock *gh_gl;
261  	struct pid *gh_owner_pid;
262  	u16 gh_flags;
263  	u16 gh_state;
264  
265  	int gh_error;
266  	unsigned long gh_iflags; /* HIF_... */
267  	unsigned long gh_ip;
268  };
269  
270  /* Number of quota types we support */
271  #define GFS2_MAXQUOTAS 2
272  
273  struct gfs2_qadata { /* quota allocation data */
274  	/* Quota stuff */
275  	struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
276  	struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
277  	unsigned int qa_qd_num;
278  	int qa_ref;
279  };
280  
281  /* Resource group multi-block reservation, in order of appearance:
282  
283     Step 1. Function prepares to write, allocates a mb, sets the size hint.
284     Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
285     Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
286     Step 4. Bits are assigned from the rgrp based on either the reservation
287             or wherever it can.
288  */
289  
290  struct gfs2_blkreserv {
291  	struct rb_node rs_node;       /* node within rd_rstree */
292  	struct gfs2_rgrpd *rs_rgd;
293  	u64 rs_start;
294  	u32 rs_requested;
295  	u32 rs_reserved;              /* number of reserved blocks */
296  };
297  
298  /*
299   * Allocation parameters
300   * @target: The number of blocks we'd ideally like to allocate
301   * @aflags: The flags (e.g. Orlov flag)
302   *
303   * The intent is to gradually expand this structure over time in
304   * order to give more information, e.g. alignment, min extent size
305   * to the allocation code.
306   */
307  struct gfs2_alloc_parms {
308  	u64 target;
309  	u32 min_target;
310  	u32 aflags;
311  	u64 allowed;
312  };
313  
314  enum {
315  	GLF_LOCK			= 1,
316  	GLF_INSTANTIATE_NEEDED		= 2, /* needs instantiate */
317  	GLF_DEMOTE			= 3,
318  	GLF_PENDING_DEMOTE		= 4,
319  	GLF_DEMOTE_IN_PROGRESS		= 5,
320  	GLF_DIRTY			= 6,
321  	GLF_LFLUSH			= 7,
322  	GLF_INVALIDATE_IN_PROGRESS	= 8,
323  	GLF_HAVE_REPLY			= 9,
324  	GLF_INITIAL			= 10,
325  	GLF_HAVE_FROZEN_REPLY		= 11,
326  	GLF_INSTANTIATE_IN_PROG		= 12, /* instantiate happening now */
327  	GLF_LRU				= 13,
328  	GLF_OBJECT			= 14, /* Used only for tracing */
329  	GLF_BLOCKING			= 15,
330  	GLF_UNLOCKED			= 16, /* Wait for glock to be unlocked */
331  	GLF_TRY_TO_EVICT		= 17, /* iopen glocks only */
332  	GLF_VERIFY_DELETE		= 18, /* iopen glocks only */
333  	GLF_PENDING_REPLY		= 19,
334  	GLF_DEFER_DELETE		= 20, /* iopen glocks only */
335  	GLF_CANCELING			= 21,
336  };
337  
338  struct gfs2_glock {
339  	unsigned long gl_flags;		/* GLF_... */
340  	struct lm_lockname gl_name;
341  
342  	struct lockref gl_lockref;
343  
344  	/* State fields protected by gl_lockref.lock */
345  	unsigned int gl_state:2,	/* Current state */
346  		     gl_target:2,	/* Target state */
347  		     gl_demote_state:2,	/* State requested by remote node */
348  		     gl_req:2,		/* State in last dlm request */
349  		     gl_reply:8;	/* Last reply from the dlm */
350  
351  	unsigned long gl_demote_time; /* time of first demote request */
352  	long gl_hold_time;
353  	struct list_head gl_holders;
354  
355  	const struct gfs2_glock_operations *gl_ops;
356  	ktime_t gl_dstamp;
357  	struct gfs2_lkstats gl_stats;
358  	struct dlm_lksb gl_lksb;
359  	unsigned long gl_tchange;
360  	void *gl_object;
361  
362  	struct list_head gl_lru;
363  	struct list_head gl_ail_list;
364  	atomic_t gl_ail_count;
365  	atomic_t gl_revokes;
366  	struct delayed_work gl_work;
367  	/* For iopen glocks only */
368  	struct {
369  		struct delayed_work gl_delete;
370  		u64 gl_no_formal_ino;
371  	};
372  	struct rcu_head gl_rcu;
373  	struct rhash_head gl_node;
374  };
375  
376  enum {
377  	GIF_QD_LOCKED		= 1,
378  	GIF_ALLOC_FAILED	= 2,
379  	GIF_SW_PAGED		= 3,
380  	GIF_FREE_VFS_INODE      = 5,
381  	GIF_GLOP_PENDING	= 6,
382  };
383  
384  struct gfs2_inode {
385  	struct inode i_inode;
386  	u64 i_no_addr;
387  	u64 i_no_formal_ino;
388  	u64 i_generation;
389  	u64 i_eattr;
390  	unsigned long i_flags;		/* GIF_... */
391  	struct gfs2_glock *i_gl;
392  	struct gfs2_holder i_iopen_gh;
393  	struct gfs2_qadata *i_qadata; /* quota allocation data */
394  	struct gfs2_holder i_rgd_gh;
395  	struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
396  	u64 i_goal;	/* goal block for allocations */
397  	atomic_t i_sizehint;  /* hint of the write size */
398  	struct rw_semaphore i_rw_mutex;
399  	struct list_head i_ordered;
400  	__be64 *i_hash_cache;
401  	u32 i_entries;
402  	u32 i_diskflags;
403  	u8 i_height;
404  	u8 i_depth;
405  	u16 i_rahead;
406  };
407  
408  /*
409   * Since i_inode is the first element of struct gfs2_inode,
410   * this is effectively a cast.
411   */
GFS2_I(struct inode * inode)412  static inline struct gfs2_inode *GFS2_I(struct inode *inode)
413  {
414  	return container_of(inode, struct gfs2_inode, i_inode);
415  }
416  
GFS2_SB(const struct inode * inode)417  static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
418  {
419  	return inode->i_sb->s_fs_info;
420  }
421  
422  struct gfs2_file {
423  	struct mutex f_fl_mutex;
424  	struct gfs2_holder f_fl_gh;
425  };
426  
427  struct gfs2_revoke_replay {
428  	struct list_head rr_list;
429  	u64 rr_blkno;
430  	unsigned int rr_where;
431  };
432  
433  enum {
434  	QDF_CHANGE		= 1,
435  	QDF_LOCKED		= 2,
436  	QDF_REFRESH		= 3,
437  	QDF_QMSG_QUIET          = 4,
438  };
439  
440  struct gfs2_quota_data {
441  	struct hlist_bl_node qd_hlist;
442  	struct list_head qd_list;
443  	struct kqid qd_id;
444  	struct gfs2_sbd *qd_sbd;
445  	struct lockref qd_lockref;
446  	struct list_head qd_lru;
447  	unsigned qd_hash;
448  
449  	unsigned long qd_flags;		/* QDF_... */
450  
451  	s64 qd_change;
452  	s64 qd_change_sync;
453  
454  	unsigned int qd_slot;
455  	unsigned int qd_slot_ref;
456  
457  	struct buffer_head *qd_bh;
458  	struct gfs2_quota_change *qd_bh_qc;
459  	unsigned int qd_bh_count;
460  
461  	struct gfs2_glock *qd_gl;
462  	struct gfs2_quota_lvb qd_qb;
463  
464  	u64 qd_sync_gen;
465  	unsigned long qd_last_warn;
466  	struct rcu_head qd_rcu;
467  };
468  
469  enum {
470  	TR_TOUCHED = 1,
471  	TR_ATTACHED = 2,
472  	TR_ONSTACK = 3,
473  };
474  
475  struct gfs2_trans {
476  	unsigned long tr_ip;
477  
478  	unsigned int tr_blocks;
479  	unsigned int tr_revokes;
480  	unsigned int tr_reserved;
481  	unsigned long tr_flags;
482  
483  	unsigned int tr_num_buf_new;
484  	unsigned int tr_num_databuf_new;
485  	unsigned int tr_num_buf_rm;
486  	unsigned int tr_num_databuf_rm;
487  	unsigned int tr_num_revoke;
488  
489  	struct list_head tr_list;
490  	struct list_head tr_databuf;
491  	struct list_head tr_buf;
492  
493  	unsigned int tr_first;
494  	struct list_head tr_ail1_list;
495  	struct list_head tr_ail2_list;
496  };
497  
498  struct gfs2_journal_extent {
499  	struct list_head list;
500  
501  	unsigned int lblock; /* First logical block */
502  	u64 dblock; /* First disk block */
503  	u64 blocks;
504  };
505  
506  struct gfs2_jdesc {
507  	struct list_head jd_list;
508  	struct list_head extent_list;
509  	unsigned int nr_extents;
510  	struct work_struct jd_work;
511  	struct inode *jd_inode;
512  	struct bio *jd_log_bio;
513  	unsigned long jd_flags;
514  #define JDF_RECOVERY 1
515  	unsigned int jd_jid;
516  	u32 jd_blocks;
517  	int jd_recover_error;
518  	/* Replay stuff */
519  
520  	unsigned int jd_found_blocks;
521  	unsigned int jd_found_revokes;
522  	unsigned int jd_replayed_blocks;
523  
524  	struct list_head jd_revoke_list;
525  	unsigned int jd_replay_tail;
526  
527  	u64 jd_no_addr;
528  };
529  
530  struct gfs2_statfs_change_host {
531  	s64 sc_total;
532  	s64 sc_free;
533  	s64 sc_dinodes;
534  };
535  
536  #define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
537  #define GFS2_QUOTA_OFF		0
538  #define GFS2_QUOTA_ACCOUNT	1
539  #define GFS2_QUOTA_ON		2
540  #define GFS2_QUOTA_QUIET	3 /* on but not complaining */
541  
542  #define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
543  #define GFS2_DATA_WRITEBACK	1
544  #define GFS2_DATA_ORDERED	2
545  
546  #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
547  #define GFS2_ERRORS_WITHDRAW    0
548  #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
549  #define GFS2_ERRORS_RO          2 /* place holder for future feature */
550  #define GFS2_ERRORS_PANIC       3
551  
552  struct gfs2_args {
553  	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
554  	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
555  	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
556  	unsigned int ar_spectator:1;		/* Don't get a journal */
557  	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
558  	unsigned int ar_debug:1;		/* Oops on errors */
559  	unsigned int ar_posix_acl:1;		/* Enable posix acls */
560  	unsigned int ar_quota:2;		/* off/account/on */
561  	unsigned int ar_suiddir:1;		/* suiddir support */
562  	unsigned int ar_data:2;			/* ordered/writeback */
563  	unsigned int ar_meta:1;			/* mount metafs */
564  	unsigned int ar_discard:1;		/* discard requests */
565  	unsigned int ar_errors:2;               /* errors=withdraw | panic */
566  	unsigned int ar_nobarrier:1;            /* do not send barriers */
567  	unsigned int ar_rgrplvb:1;		/* use lvbs for rgrp info */
568  	unsigned int ar_got_rgrplvb:1;		/* Was the rgrplvb opt given? */
569  	unsigned int ar_loccookie:1;		/* use location based readdir
570  						   cookies */
571  	s32 ar_commit;				/* Commit interval */
572  	s32 ar_statfs_quantum;			/* The fast statfs interval */
573  	s32 ar_quota_quantum;			/* The quota interval */
574  	s32 ar_statfs_percent;			/* The % change to force sync */
575  };
576  
577  struct gfs2_tune {
578  	spinlock_t gt_spin;
579  
580  	unsigned int gt_logd_secs;
581  
582  	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
583  	unsigned int gt_quota_scale_num; /* Numerator */
584  	unsigned int gt_quota_scale_den; /* Denominator */
585  	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
586  	unsigned int gt_new_files_jdata;
587  	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
588  	unsigned int gt_complain_secs;
589  	unsigned int gt_statfs_quantum;
590  	unsigned int gt_statfs_slow;
591  };
592  
593  enum {
594  	SDF_JOURNAL_CHECKED	= 0,
595  	SDF_JOURNAL_LIVE	= 1,
596  	SDF_WITHDRAWN		= 2,
597  	SDF_NOBARRIERS		= 3,
598  	SDF_NORECOVERY		= 4,
599  	SDF_DEMOTE		= 5,
600  	SDF_NOJOURNALID		= 6,
601  	SDF_RORECOVERY		= 7, /* read only recovery */
602  	SDF_SKIP_DLM_UNLOCK	= 8,
603  	SDF_FORCE_AIL_FLUSH     = 9,
604  	SDF_FREEZE_INITIATOR	= 10,
605  	SDF_WITHDRAWING		= 11, /* Will withdraw eventually */
606  	SDF_WITHDRAW_IN_PROG	= 12, /* Withdraw is in progress */
607  	SDF_REMOTE_WITHDRAW	= 13, /* Performing remote recovery */
608  	SDF_WITHDRAW_RECOVERY	= 14, /* Wait for journal recovery when we are
609  					 withdrawing */
610  	SDF_KILL		= 15,
611  	SDF_EVICTING		= 16,
612  	SDF_FROZEN		= 17,
613  };
614  
615  #define GFS2_FSNAME_LEN		256
616  
617  struct gfs2_inum_host {
618  	u64 no_formal_ino;
619  	u64 no_addr;
620  };
621  
622  struct gfs2_sb_host {
623  	u32 sb_magic;
624  	u32 sb_type;
625  
626  	u32 sb_fs_format;
627  	u32 sb_multihost_format;
628  	u32 sb_bsize;
629  	u32 sb_bsize_shift;
630  
631  	struct gfs2_inum_host sb_master_dir;
632  	struct gfs2_inum_host sb_root_dir;
633  
634  	char sb_lockproto[GFS2_LOCKNAME_LEN];
635  	char sb_locktable[GFS2_LOCKNAME_LEN];
636  };
637  
638  /*
639   * lm_mount() return values
640   *
641   * ls_jid - the journal ID this node should use
642   * ls_first - this node is the first to mount the file system
643   * ls_lockspace - lock module's context for this file system
644   * ls_ops - lock module's functions
645   */
646  
647  struct lm_lockstruct {
648  	int ls_jid;
649  	unsigned int ls_first;
650  	const struct lm_lockops *ls_ops;
651  	dlm_lockspace_t *ls_dlm;
652  
653  	int ls_recover_jid_done;   /* These two are deprecated, */
654  	int ls_recover_jid_status; /* used previously by gfs_controld */
655  
656  	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
657  	struct dlm_lksb ls_control_lksb; /* control_lock */
658  	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
659  	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
660  	char *ls_lvb_bits;
661  
662  	spinlock_t ls_recover_spin; /* protects following fields */
663  	unsigned long ls_recover_flags; /* DFL_ */
664  	uint32_t ls_recover_mount; /* gen in first recover_done cb */
665  	uint32_t ls_recover_start; /* gen in last recover_done cb */
666  	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
667  	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
668  	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
669  	uint32_t *ls_recover_result; /* result of last jid recovery */
670  };
671  
672  struct gfs2_pcpu_lkstats {
673  	/* One struct for each glock type */
674  	struct gfs2_lkstats lkstats[10];
675  };
676  
677  /* List of local (per node) statfs inodes */
678  struct local_statfs_inode {
679  	struct list_head si_list;
680  	struct inode *si_sc_inode;
681  	unsigned int si_jid; /* journal id this statfs inode corresponds to */
682  };
683  
684  struct gfs2_sbd {
685  	struct super_block *sd_vfs;
686  	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
687  	struct kobject sd_kobj;
688  	struct completion sd_kobj_unregister;
689  	unsigned long sd_flags;	/* SDF_... */
690  	struct gfs2_sb_host sd_sb;
691  
692  	/* Constants computed on mount */
693  
694  	u32 sd_fsb2bb;
695  	u32 sd_fsb2bb_shift;
696  	u32 sd_diptrs;	/* Number of pointers in a dinode */
697  	u32 sd_inptrs;	/* Number of pointers in a indirect block */
698  	u32 sd_ldptrs;  /* Number of pointers in a log descriptor block */
699  	u32 sd_jbsize;	/* Size of a journaled data block */
700  	u32 sd_hash_bsize;	/* sizeof(exhash block) */
701  	u32 sd_hash_bsize_shift;
702  	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
703  	u32 sd_qc_per_block;
704  	u32 sd_blocks_per_bitmap;
705  	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
706  	u32 sd_max_height;	/* Max height of a file's metadata tree */
707  	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
708  	u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
709  
710  	struct gfs2_args sd_args;	/* Mount arguments */
711  	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
712  
713  	/* Lock Stuff */
714  
715  	struct lm_lockstruct sd_lockstruct;
716  	struct gfs2_holder sd_live_gh;
717  	struct gfs2_glock *sd_rename_gl;
718  	struct gfs2_glock *sd_freeze_gl;
719  	struct work_struct sd_freeze_work;
720  	wait_queue_head_t sd_kill_wait;
721  	wait_queue_head_t sd_async_glock_wait;
722  	atomic_t sd_glock_disposal;
723  	struct completion sd_locking_init;
724  	struct completion sd_wdack;
725  	struct delayed_work sd_control_work;
726  
727  	/* Inode Stuff */
728  
729  	struct dentry *sd_master_dir;
730  	struct dentry *sd_root_dir;
731  
732  	struct inode *sd_jindex;
733  	struct inode *sd_statfs_inode;
734  	struct inode *sd_sc_inode;
735  	struct list_head sd_sc_inodes_list;
736  	struct inode *sd_qc_inode;
737  	struct inode *sd_rindex;
738  	struct inode *sd_quota_inode;
739  
740  	/* StatFS stuff */
741  
742  	spinlock_t sd_statfs_spin;
743  	struct gfs2_statfs_change_host sd_statfs_master;
744  	struct gfs2_statfs_change_host sd_statfs_local;
745  	int sd_statfs_force_sync;
746  
747  	/* Resource group stuff */
748  
749  	int sd_rindex_uptodate;
750  	spinlock_t sd_rindex_spin;
751  	struct rb_root sd_rindex_tree;
752  	unsigned int sd_rgrps;
753  	unsigned int sd_max_rg_data;
754  
755  	/* Journal index stuff */
756  
757  	struct list_head sd_jindex_list;
758  	spinlock_t sd_jindex_spin;
759  	struct mutex sd_jindex_mutex;
760  	unsigned int sd_journals;
761  
762  	struct gfs2_jdesc *sd_jdesc;
763  	struct gfs2_holder sd_journal_gh;
764  	struct gfs2_holder sd_jinode_gh;
765  	struct gfs2_glock *sd_jinode_gl;
766  
767  	struct gfs2_holder sd_sc_gh;
768  	struct buffer_head *sd_sc_bh;
769  	struct gfs2_holder sd_qc_gh;
770  
771  	struct completion sd_journal_ready;
772  
773  	/* Workqueue stuff */
774  
775  	struct workqueue_struct *sd_glock_wq;
776  	struct workqueue_struct *sd_delete_wq;
777  
778  	/* Daemon stuff */
779  
780  	struct task_struct *sd_logd_process;
781  	struct task_struct *sd_quotad_process;
782  
783  	/* Quota stuff */
784  
785  	struct list_head sd_quota_list;
786  	atomic_t sd_quota_count;
787  	struct mutex sd_quota_sync_mutex;
788  	wait_queue_head_t sd_quota_wait;
789  
790  	unsigned int sd_quota_slots;
791  	unsigned long *sd_quota_bitmap;
792  	spinlock_t sd_bitmap_lock;
793  
794  	u64 sd_quota_sync_gen;
795  
796  	/* Log stuff */
797  
798  	struct address_space sd_aspace;
799  
800  	spinlock_t sd_log_lock;
801  
802  	struct gfs2_trans *sd_log_tr;
803  	unsigned int sd_log_blks_reserved;
804  
805  	atomic_t sd_log_pinned;
806  	unsigned int sd_log_num_revoke;
807  
808  	struct list_head sd_log_revokes;
809  	struct list_head sd_log_ordered;
810  	spinlock_t sd_ordered_lock;
811  
812  	atomic_t sd_log_thresh1;
813  	atomic_t sd_log_thresh2;
814  	atomic_t sd_log_blks_free;
815  	atomic_t sd_log_blks_needed;
816  	atomic_t sd_log_revokes_available;
817  	wait_queue_head_t sd_log_waitq;
818  	wait_queue_head_t sd_logd_waitq;
819  
820  	u64 sd_log_sequence;
821  	int sd_log_idle;
822  
823  	struct rw_semaphore sd_log_flush_lock;
824  	atomic_t sd_log_in_flight;
825  	wait_queue_head_t sd_log_flush_wait;
826  	int sd_log_error; /* First log error */
827  	wait_queue_head_t sd_withdraw_wait;
828  
829  	unsigned int sd_log_tail;
830  	unsigned int sd_log_flush_tail;
831  	unsigned int sd_log_head;
832  	unsigned int sd_log_flush_head;
833  
834  	spinlock_t sd_ail_lock;
835  	struct list_head sd_ail1_list;
836  	struct list_head sd_ail2_list;
837  
838  	/* For quiescing the filesystem */
839  	struct gfs2_holder sd_freeze_gh;
840  	struct mutex sd_freeze_mutex;
841  	struct list_head sd_dead_glocks;
842  
843  	char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
844  	char sd_table_name[GFS2_FSNAME_LEN];
845  	char sd_proto_name[GFS2_FSNAME_LEN];
846  
847  	/* Debugging crud */
848  
849  	unsigned long sd_last_warning;
850  	struct dentry *debugfs_dir;    /* debugfs directory */
851  	unsigned long sd_glock_dqs_held;
852  };
853  
gfs2_glstats_inc(struct gfs2_glock * gl,int which)854  static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
855  {
856  	gl->gl_stats.stats[which]++;
857  }
858  
gfs2_sbstats_inc(const struct gfs2_glock * gl,int which)859  static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
860  {
861  	const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
862  	preempt_disable();
863  	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
864  	preempt_enable();
865  }
866  
867  struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
868  
gfs2_max_stuffed_size(const struct gfs2_inode * ip)869  static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
870  {
871  	return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
872  }
873  
874  #endif /* __INCORE_DOT_H__ */
875  
876