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_log_element;
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_log_element *le);
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 struct gfs2_log_element {
68 	struct list_head le_list;
69 	const struct gfs2_log_operations *le_ops;
70 };
71 
72 #define GBF_FULL 1
73 
74 struct gfs2_bitmap {
75 	struct buffer_head *bi_bh;
76 	char *bi_clone;
77 	unsigned long bi_flags;
78 	u32 bi_offset;
79 	u32 bi_start;
80 	u32 bi_len;
81 };
82 
83 struct gfs2_rgrpd {
84 	struct rb_node rd_node;		/* Link with superblock */
85 	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
86 	u64 rd_addr;			/* grp block disk address */
87 	u64 rd_data0;			/* first data location */
88 	u32 rd_length;			/* length of rgrp header in fs blocks */
89 	u32 rd_data;			/* num of data blocks in rgrp */
90 	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
91 	u32 rd_free;
92 	u32 rd_free_clone;
93 	u32 rd_dinodes;
94 	u64 rd_igeneration;
95 	struct gfs2_bitmap *rd_bits;
96 	struct gfs2_sbd *rd_sbd;
97 	u32 rd_last_alloc;
98 	u32 rd_flags;
99 #define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
100 #define GFS2_RDF_UPTODATE	0x20000000 /* rg is up to date */
101 #define GFS2_RDF_ERROR		0x40000000 /* error in rg */
102 #define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */
103 };
104 
105 enum gfs2_state_bits {
106 	BH_Pinned = BH_PrivateStart,
107 	BH_Escaped = BH_PrivateStart + 1,
108 	BH_Zeronew = BH_PrivateStart + 2,
109 };
110 
111 BUFFER_FNS(Pinned, pinned)
112 TAS_BUFFER_FNS(Pinned, pinned)
113 BUFFER_FNS(Escaped, escaped)
114 TAS_BUFFER_FNS(Escaped, escaped)
115 BUFFER_FNS(Zeronew, zeronew)
116 TAS_BUFFER_FNS(Zeronew, zeronew)
117 
118 struct gfs2_bufdata {
119 	struct buffer_head *bd_bh;
120 	struct gfs2_glock *bd_gl;
121 
122 	union {
123 		struct list_head list_tr;
124 		u64 blkno;
125 	} u;
126 #define bd_list_tr u.list_tr
127 #define bd_blkno u.blkno
128 
129 	struct gfs2_log_element bd_le;
130 
131 	struct gfs2_ail *bd_ail;
132 	struct list_head bd_ail_st_list;
133 	struct list_head bd_ail_gl_list;
134 };
135 
136 /*
137  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
138  * prefix of lock_dlm_ gets awkward.
139  */
140 
141 #define GDLM_STRNAME_BYTES	25
142 #define GDLM_LVB_SIZE		32
143 
144 /*
145  * ls_recover_flags:
146  *
147  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
148  * held by failed nodes whose journals need recovery.  Those locks should
149  * only be used for journal recovery until the journal recovery is done.
150  * This is set by the dlm recover_prep callback and cleared by the
151  * gfs2_control thread when journal recovery is complete.  To avoid
152  * races between recover_prep setting and gfs2_control clearing, recover_spin
153  * is held while changing this bit and reading/writing recover_block
154  * and recover_start.
155  *
156  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
157  *
158  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
159  * recovery of all journals before allowing other nodes to mount the fs.
160  * This is cleared when FIRST_MOUNT_DONE is set.
161  *
162  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
163  * recovery of all journals, and now allows other nodes to mount the fs.
164  *
165  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
166  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
167  * control clearing BLOCK_LOCKS for further recoveries.
168  *
169  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
170  *
171  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
172  * and recover_done(), i.e. set while recover_block == recover_start.
173  */
174 
175 enum {
176 	DFL_BLOCK_LOCKS		= 0,
177 	DFL_NO_DLM_OPS		= 1,
178 	DFL_FIRST_MOUNT		= 2,
179 	DFL_FIRST_MOUNT_DONE	= 3,
180 	DFL_MOUNT_DONE		= 4,
181 	DFL_UNMOUNT		= 5,
182 	DFL_DLM_RECOVERY	= 6,
183 };
184 
185 struct lm_lockname {
186 	u64 ln_number;
187 	unsigned int ln_type;
188 };
189 
190 #define lm_name_equal(name1, name2) \
191         (((name1)->ln_number == (name2)->ln_number) && \
192          ((name1)->ln_type == (name2)->ln_type))
193 
194 
195 struct gfs2_glock_operations {
196 	void (*go_xmote_th) (struct gfs2_glock *gl);
197 	int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
198 	void (*go_inval) (struct gfs2_glock *gl, int flags);
199 	int (*go_demote_ok) (const struct gfs2_glock *gl);
200 	int (*go_lock) (struct gfs2_holder *gh);
201 	void (*go_unlock) (struct gfs2_holder *gh);
202 	int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
203 	void (*go_callback) (struct gfs2_glock *gl);
204 	const int go_type;
205 	const unsigned long go_flags;
206 #define GLOF_ASPACE 1
207 };
208 
209 enum {
210 	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
211 	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
212 	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
213 	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
214 	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
215 	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
216 	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
217 	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
218 	GFS2_NR_LKSTATS
219 };
220 
221 struct gfs2_lkstats {
222 	s64 stats[GFS2_NR_LKSTATS];
223 };
224 
225 enum {
226 	/* States */
227 	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
228 	HIF_FIRST		= 7,
229 	HIF_WAIT		= 10,
230 };
231 
232 struct gfs2_holder {
233 	struct list_head gh_list;
234 
235 	struct gfs2_glock *gh_gl;
236 	struct pid *gh_owner_pid;
237 	unsigned int gh_state;
238 	unsigned gh_flags;
239 
240 	int gh_error;
241 	unsigned long gh_iflags; /* HIF_... */
242 	unsigned long gh_ip;
243 };
244 
245 enum {
246 	GLF_LOCK			= 1,
247 	GLF_DEMOTE			= 3,
248 	GLF_PENDING_DEMOTE		= 4,
249 	GLF_DEMOTE_IN_PROGRESS		= 5,
250 	GLF_DIRTY			= 6,
251 	GLF_LFLUSH			= 7,
252 	GLF_INVALIDATE_IN_PROGRESS	= 8,
253 	GLF_REPLY_PENDING		= 9,
254 	GLF_INITIAL			= 10,
255 	GLF_FROZEN			= 11,
256 	GLF_QUEUED			= 12,
257 	GLF_LRU				= 13,
258 	GLF_OBJECT			= 14, /* Used only for tracing */
259 	GLF_BLOCKING			= 15,
260 };
261 
262 struct gfs2_glock {
263 	struct hlist_bl_node gl_list;
264 	struct gfs2_sbd *gl_sbd;
265 	unsigned long gl_flags;		/* GLF_... */
266 	struct lm_lockname gl_name;
267 	atomic_t gl_ref;
268 
269 	spinlock_t gl_spin;
270 
271 	/* State fields protected by gl_spin */
272 	unsigned int gl_state:2,	/* Current state */
273 		     gl_target:2,	/* Target state */
274 		     gl_demote_state:2,	/* State requested by remote node */
275 		     gl_req:2,		/* State in last dlm request */
276 		     gl_reply:8;	/* Last reply from the dlm */
277 
278 	unsigned int gl_hash;
279 	unsigned long gl_demote_time; /* time of first demote request */
280 	long gl_hold_time;
281 	struct list_head gl_holders;
282 
283 	const struct gfs2_glock_operations *gl_ops;
284 	ktime_t gl_dstamp;
285 	struct gfs2_lkstats gl_stats;
286 	struct dlm_lksb gl_lksb;
287 	char gl_lvb[32];
288 	unsigned long gl_tchange;
289 	void *gl_object;
290 
291 	struct list_head gl_lru;
292 	struct list_head gl_ail_list;
293 	atomic_t gl_ail_count;
294 	atomic_t gl_revokes;
295 	struct delayed_work gl_work;
296 	struct work_struct gl_delete;
297 	struct rcu_head gl_rcu;
298 };
299 
300 #define GFS2_MIN_LVB_SIZE 32	/* Min size of LVB that gfs2 supports */
301 
302 struct gfs2_qadata { /* quota allocation data */
303 	/* Quota stuff */
304 	struct gfs2_quota_data *qa_qd[2*MAXQUOTAS];
305 	struct gfs2_holder qa_qd_ghs[2*MAXQUOTAS];
306 	unsigned int qa_qd_num;
307 };
308 
309 struct gfs2_blkreserv {
310 	u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
311 	struct gfs2_holder rs_rgd_gh; /* Filled in by gfs2_inplace_reserve() */
312 };
313 
314 enum {
315 	GIF_INVALID		= 0,
316 	GIF_QD_LOCKED		= 1,
317 	GIF_ALLOC_FAILED	= 2,
318 	GIF_SW_PAGED		= 3,
319 };
320 
321 
322 struct gfs2_inode {
323 	struct inode i_inode;
324 	u64 i_no_addr;
325 	u64 i_no_formal_ino;
326 	u64 i_generation;
327 	u64 i_eattr;
328 	unsigned long i_flags;		/* GIF_... */
329 	struct gfs2_glock *i_gl; /* Move into i_gh? */
330 	struct gfs2_holder i_iopen_gh;
331 	struct gfs2_holder i_gh; /* for prepare/commit_write only */
332 	struct gfs2_qadata *i_qadata; /* quota allocation data */
333 	struct gfs2_blkreserv *i_res; /* resource group block reservation */
334 	struct gfs2_rgrpd *i_rgd;
335 	u64 i_goal;	/* goal block for allocations */
336 	struct rw_semaphore i_rw_mutex;
337 	struct list_head i_trunc_list;
338 	__be64 *i_hash_cache;
339 	u32 i_entries;
340 	u32 i_diskflags;
341 	u8 i_height;
342 	u8 i_depth;
343 };
344 
345 /*
346  * Since i_inode is the first element of struct gfs2_inode,
347  * this is effectively a cast.
348  */
GFS2_I(struct inode * inode)349 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
350 {
351 	return container_of(inode, struct gfs2_inode, i_inode);
352 }
353 
GFS2_SB(const struct inode * inode)354 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
355 {
356 	return inode->i_sb->s_fs_info;
357 }
358 
359 struct gfs2_file {
360 	struct mutex f_fl_mutex;
361 	struct gfs2_holder f_fl_gh;
362 };
363 
364 struct gfs2_revoke_replay {
365 	struct list_head rr_list;
366 	u64 rr_blkno;
367 	unsigned int rr_where;
368 };
369 
370 enum {
371 	QDF_USER		= 0,
372 	QDF_CHANGE		= 1,
373 	QDF_LOCKED		= 2,
374 	QDF_REFRESH		= 3,
375 };
376 
377 struct gfs2_quota_data {
378 	struct list_head qd_list;
379 	struct list_head qd_reclaim;
380 
381 	atomic_t qd_count;
382 
383 	u32 qd_id;
384 	unsigned long qd_flags;		/* QDF_... */
385 
386 	s64 qd_change;
387 	s64 qd_change_sync;
388 
389 	unsigned int qd_slot;
390 	unsigned int qd_slot_count;
391 
392 	struct buffer_head *qd_bh;
393 	struct gfs2_quota_change *qd_bh_qc;
394 	unsigned int qd_bh_count;
395 
396 	struct gfs2_glock *qd_gl;
397 	struct gfs2_quota_lvb qd_qb;
398 
399 	u64 qd_sync_gen;
400 	unsigned long qd_last_warn;
401 };
402 
403 struct gfs2_trans {
404 	unsigned long tr_ip;
405 
406 	unsigned int tr_blocks;
407 	unsigned int tr_revokes;
408 	unsigned int tr_reserved;
409 
410 	struct gfs2_holder tr_t_gh;
411 
412 	int tr_touched;
413 
414 	unsigned int tr_num_buf;
415 	unsigned int tr_num_buf_new;
416 	unsigned int tr_num_databuf_new;
417 	unsigned int tr_num_buf_rm;
418 	unsigned int tr_num_databuf_rm;
419 	struct list_head tr_list_buf;
420 
421 	unsigned int tr_num_revoke;
422 	unsigned int tr_num_revoke_rm;
423 };
424 
425 struct gfs2_ail {
426 	struct list_head ai_list;
427 
428 	unsigned int ai_first;
429 	struct list_head ai_ail1_list;
430 	struct list_head ai_ail2_list;
431 };
432 
433 struct gfs2_journal_extent {
434 	struct list_head extent_list;
435 
436 	unsigned int lblock; /* First logical block */
437 	u64 dblock; /* First disk block */
438 	u64 blocks;
439 };
440 
441 struct gfs2_jdesc {
442 	struct list_head jd_list;
443 	struct list_head extent_list;
444 	struct work_struct jd_work;
445 	struct inode *jd_inode;
446 	unsigned long jd_flags;
447 #define JDF_RECOVERY 1
448 	unsigned int jd_jid;
449 	unsigned int jd_blocks;
450 	int jd_recover_error;
451 };
452 
453 struct gfs2_statfs_change_host {
454 	s64 sc_total;
455 	s64 sc_free;
456 	s64 sc_dinodes;
457 };
458 
459 #define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
460 #define GFS2_QUOTA_OFF		0
461 #define GFS2_QUOTA_ACCOUNT	1
462 #define GFS2_QUOTA_ON		2
463 
464 #define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
465 #define GFS2_DATA_WRITEBACK	1
466 #define GFS2_DATA_ORDERED	2
467 
468 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
469 #define GFS2_ERRORS_WITHDRAW    0
470 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
471 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
472 #define GFS2_ERRORS_PANIC       3
473 
474 struct gfs2_args {
475 	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
476 	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
477 	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
478 	unsigned int ar_spectator:1;		/* Don't get a journal */
479 	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
480 	unsigned int ar_debug:1;		/* Oops on errors */
481 	unsigned int ar_posix_acl:1;		/* Enable posix acls */
482 	unsigned int ar_quota:2;		/* off/account/on */
483 	unsigned int ar_suiddir:1;		/* suiddir support */
484 	unsigned int ar_data:2;			/* ordered/writeback */
485 	unsigned int ar_meta:1;			/* mount metafs */
486 	unsigned int ar_discard:1;		/* discard requests */
487 	unsigned int ar_errors:2;               /* errors=withdraw | panic */
488 	unsigned int ar_nobarrier:1;            /* do not send barriers */
489 	int ar_commit;				/* Commit interval */
490 	int ar_statfs_quantum;			/* The fast statfs interval */
491 	int ar_quota_quantum;			/* The quota interval */
492 	int ar_statfs_percent;			/* The % change to force sync */
493 };
494 
495 struct gfs2_tune {
496 	spinlock_t gt_spin;
497 
498 	unsigned int gt_logd_secs;
499 
500 	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
501 	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
502 	unsigned int gt_quota_scale_num; /* Numerator */
503 	unsigned int gt_quota_scale_den; /* Denominator */
504 	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
505 	unsigned int gt_new_files_jdata;
506 	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
507 	unsigned int gt_complain_secs;
508 	unsigned int gt_statfs_quantum;
509 	unsigned int gt_statfs_slow;
510 };
511 
512 enum {
513 	SDF_JOURNAL_CHECKED	= 0,
514 	SDF_JOURNAL_LIVE	= 1,
515 	SDF_SHUTDOWN		= 2,
516 	SDF_NOBARRIERS		= 3,
517 	SDF_NORECOVERY		= 4,
518 	SDF_DEMOTE		= 5,
519 	SDF_NOJOURNALID		= 6,
520 	SDF_RORECOVERY		= 7, /* read only recovery */
521 };
522 
523 #define GFS2_FSNAME_LEN		256
524 
525 struct gfs2_inum_host {
526 	u64 no_formal_ino;
527 	u64 no_addr;
528 };
529 
530 struct gfs2_sb_host {
531 	u32 sb_magic;
532 	u32 sb_type;
533 	u32 sb_format;
534 
535 	u32 sb_fs_format;
536 	u32 sb_multihost_format;
537 	u32 sb_bsize;
538 	u32 sb_bsize_shift;
539 
540 	struct gfs2_inum_host sb_master_dir;
541 	struct gfs2_inum_host sb_root_dir;
542 
543 	char sb_lockproto[GFS2_LOCKNAME_LEN];
544 	char sb_locktable[GFS2_LOCKNAME_LEN];
545 };
546 
547 /*
548  * lm_mount() return values
549  *
550  * ls_jid - the journal ID this node should use
551  * ls_first - this node is the first to mount the file system
552  * ls_lockspace - lock module's context for this file system
553  * ls_ops - lock module's functions
554  */
555 
556 struct lm_lockstruct {
557 	int ls_jid;
558 	unsigned int ls_first;
559 	unsigned int ls_nodir;
560 	const struct lm_lockops *ls_ops;
561 	dlm_lockspace_t *ls_dlm;
562 
563 	int ls_recover_jid_done;   /* These two are deprecated, */
564 	int ls_recover_jid_status; /* used previously by gfs_controld */
565 
566 	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
567 	struct dlm_lksb ls_control_lksb; /* control_lock */
568 	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
569 	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
570 
571 	spinlock_t ls_recover_spin; /* protects following fields */
572 	unsigned long ls_recover_flags; /* DFL_ */
573 	uint32_t ls_recover_mount; /* gen in first recover_done cb */
574 	uint32_t ls_recover_start; /* gen in last recover_done cb */
575 	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
576 	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
577 	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
578 	uint32_t *ls_recover_result; /* result of last jid recovery */
579 };
580 
581 struct gfs2_pcpu_lkstats {
582 	/* One struct for each glock type */
583 	struct gfs2_lkstats lkstats[10];
584 };
585 
586 struct gfs2_sbd {
587 	struct super_block *sd_vfs;
588 	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
589 	struct kobject sd_kobj;
590 	unsigned long sd_flags;	/* SDF_... */
591 	struct gfs2_sb_host sd_sb;
592 
593 	/* Constants computed on mount */
594 
595 	u32 sd_fsb2bb;
596 	u32 sd_fsb2bb_shift;
597 	u32 sd_diptrs;	/* Number of pointers in a dinode */
598 	u32 sd_inptrs;	/* Number of pointers in a indirect block */
599 	u32 sd_jbsize;	/* Size of a journaled data block */
600 	u32 sd_hash_bsize;	/* sizeof(exhash block) */
601 	u32 sd_hash_bsize_shift;
602 	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
603 	u32 sd_qc_per_block;
604 	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
605 	u32 sd_max_height;	/* Max height of a file's metadata tree */
606 	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
607 	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
608 	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
609 
610 	struct gfs2_args sd_args;	/* Mount arguments */
611 	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
612 
613 	/* Lock Stuff */
614 
615 	struct lm_lockstruct sd_lockstruct;
616 	struct gfs2_holder sd_live_gh;
617 	struct gfs2_glock *sd_rename_gl;
618 	struct gfs2_glock *sd_trans_gl;
619 	wait_queue_head_t sd_glock_wait;
620 	atomic_t sd_glock_disposal;
621 	struct completion sd_locking_init;
622 	struct delayed_work sd_control_work;
623 
624 	/* Inode Stuff */
625 
626 	struct dentry *sd_master_dir;
627 	struct dentry *sd_root_dir;
628 
629 	struct inode *sd_jindex;
630 	struct inode *sd_statfs_inode;
631 	struct inode *sd_sc_inode;
632 	struct inode *sd_qc_inode;
633 	struct inode *sd_rindex;
634 	struct inode *sd_quota_inode;
635 
636 	/* StatFS stuff */
637 
638 	spinlock_t sd_statfs_spin;
639 	struct gfs2_statfs_change_host sd_statfs_master;
640 	struct gfs2_statfs_change_host sd_statfs_local;
641 	int sd_statfs_force_sync;
642 
643 	/* Resource group stuff */
644 
645 	int sd_rindex_uptodate;
646 	spinlock_t sd_rindex_spin;
647 	struct rb_root sd_rindex_tree;
648 	unsigned int sd_rgrps;
649 	unsigned int sd_max_rg_data;
650 
651 	/* Journal index stuff */
652 
653 	struct list_head sd_jindex_list;
654 	spinlock_t sd_jindex_spin;
655 	struct mutex sd_jindex_mutex;
656 	unsigned int sd_journals;
657 
658 	struct gfs2_jdesc *sd_jdesc;
659 	struct gfs2_holder sd_journal_gh;
660 	struct gfs2_holder sd_jinode_gh;
661 
662 	struct gfs2_holder sd_sc_gh;
663 	struct gfs2_holder sd_qc_gh;
664 
665 	/* Daemon stuff */
666 
667 	struct task_struct *sd_logd_process;
668 	struct task_struct *sd_quotad_process;
669 
670 	/* Quota stuff */
671 
672 	struct list_head sd_quota_list;
673 	atomic_t sd_quota_count;
674 	struct mutex sd_quota_mutex;
675 	wait_queue_head_t sd_quota_wait;
676 	struct list_head sd_trunc_list;
677 	spinlock_t sd_trunc_lock;
678 
679 	unsigned int sd_quota_slots;
680 	unsigned int sd_quota_chunks;
681 	unsigned char **sd_quota_bitmap;
682 
683 	u64 sd_quota_sync_gen;
684 
685 	/* Log stuff */
686 
687 	spinlock_t sd_log_lock;
688 
689 	unsigned int sd_log_blks_reserved;
690 	unsigned int sd_log_commited_buf;
691 	unsigned int sd_log_commited_databuf;
692 	int sd_log_commited_revoke;
693 
694 	atomic_t sd_log_pinned;
695 	unsigned int sd_log_num_buf;
696 	unsigned int sd_log_num_revoke;
697 	unsigned int sd_log_num_rg;
698 	unsigned int sd_log_num_databuf;
699 
700 	struct list_head sd_log_le_buf;
701 	struct list_head sd_log_le_revoke;
702 	struct list_head sd_log_le_rg;
703 	struct list_head sd_log_le_databuf;
704 	struct list_head sd_log_le_ordered;
705 
706 	atomic_t sd_log_thresh1;
707 	atomic_t sd_log_thresh2;
708 	atomic_t sd_log_blks_free;
709 	wait_queue_head_t sd_log_waitq;
710 	wait_queue_head_t sd_logd_waitq;
711 
712 	u64 sd_log_sequence;
713 	unsigned int sd_log_head;
714 	unsigned int sd_log_tail;
715 	int sd_log_idle;
716 
717 	struct rw_semaphore sd_log_flush_lock;
718 	atomic_t sd_log_in_flight;
719 	wait_queue_head_t sd_log_flush_wait;
720 
721 	unsigned int sd_log_flush_head;
722 	u64 sd_log_flush_wrapped;
723 
724 	spinlock_t sd_ail_lock;
725 	struct list_head sd_ail1_list;
726 	struct list_head sd_ail2_list;
727 
728 	/* Replay stuff */
729 
730 	struct list_head sd_revoke_list;
731 	unsigned int sd_replay_tail;
732 
733 	unsigned int sd_found_blocks;
734 	unsigned int sd_found_revokes;
735 	unsigned int sd_replayed_blocks;
736 
737 	/* For quiescing the filesystem */
738 
739 	struct gfs2_holder sd_freeze_gh;
740 	struct mutex sd_freeze_lock;
741 	unsigned int sd_freeze_count;
742 
743 	char sd_fsname[GFS2_FSNAME_LEN];
744 	char sd_table_name[GFS2_FSNAME_LEN];
745 	char sd_proto_name[GFS2_FSNAME_LEN];
746 
747 	/* Debugging crud */
748 
749 	unsigned long sd_last_warning;
750 	struct dentry *debugfs_dir;    /* debugfs directory */
751 	struct dentry *debugfs_dentry_glocks;
752 	struct dentry *debugfs_dentry_glstats;
753 	struct dentry *debugfs_dentry_sbstats;
754 };
755 
gfs2_glstats_inc(struct gfs2_glock * gl,int which)756 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
757 {
758 	gl->gl_stats.stats[which]++;
759 }
760 
gfs2_sbstats_inc(const struct gfs2_glock * gl,int which)761 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
762 {
763 	const struct gfs2_sbd *sdp = gl->gl_sbd;
764 	preempt_disable();
765 	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
766 	preempt_enable();
767 }
768 
769 #endif /* __INCORE_DOT_H__ */
770 
771