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TOMOYO Linux Cross Reference
Linux/fs/gfs2/incore.h

Version: ~ [ linux-5.19-rc3 ] ~ [ linux-5.18.5 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.48 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.123 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.199 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.248 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.284 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.319 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
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  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 #include <linux/lockref.h>
 25 #include <linux/rhashtable.h>
 26 
 27 #define DIO_WAIT        0x00000010
 28 #define DIO_METADATA    0x00000020
 29 
 30 struct gfs2_log_operations;
 31 struct gfs2_bufdata;
 32 struct gfs2_holder;
 33 struct gfs2_glock;
 34 struct gfs2_quota_data;
 35 struct gfs2_trans;
 36 struct gfs2_jdesc;
 37 struct gfs2_sbd;
 38 struct lm_lockops;
 39 
 40 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
 41 
 42 struct gfs2_log_header_host {
 43         u64 lh_sequence;        /* Sequence number of this transaction */
 44         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
 45         u32 lh_tail;            /* Block number of log tail */
 46         u32 lh_blkno;
 47         u32 lh_hash;
 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 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         u32 bi_blocks;
 77 };
 78 
 79 struct gfs2_rgrpd {
 80         struct rb_node rd_node;         /* Link with superblock */
 81         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
 82         u64 rd_addr;                    /* grp block disk address */
 83         u64 rd_data0;                   /* first data location */
 84         u32 rd_length;                  /* length of rgrp header in fs blocks */
 85         u32 rd_data;                    /* num of data blocks in rgrp */
 86         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
 87         u32 rd_free;
 88         u32 rd_reserved;                /* number of blocks reserved */
 89         u32 rd_free_clone;
 90         u32 rd_dinodes;
 91         u64 rd_igeneration;
 92         struct gfs2_bitmap *rd_bits;
 93         struct gfs2_sbd *rd_sbd;
 94         struct gfs2_rgrp_lvb *rd_rgl;
 95         u32 rd_last_alloc;
 96         u32 rd_flags;
 97         u32 rd_extfail_pt;              /* extent failure point */
 98 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
 99 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
100 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
101 #define GFS2_RDF_PREFERRED      0x80000000 /* This rgrp is preferred */
102 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
103         spinlock_t rd_rsspin;           /* protects reservation related vars */
104         struct rb_root rd_rstree;       /* multi-block reservation tree */
105 };
106 
107 struct gfs2_rbm {
108         struct gfs2_rgrpd *rgd;
109         u32 offset;             /* The offset is bitmap relative */
110         int bii;                /* Bitmap index */
111 };
112 
113 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
114 {
115         return rbm->rgd->rd_bits + rbm->bii;
116 }
117 
118 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
119 {
120         return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
121                 rbm->offset;
122 }
123 
124 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
125                                const struct gfs2_rbm *rbm2)
126 {
127         return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
128                (rbm1->offset == rbm2->offset);
129 }
130 
131 enum gfs2_state_bits {
132         BH_Pinned = BH_PrivateStart,
133         BH_Escaped = BH_PrivateStart + 1,
134         BH_Zeronew = BH_PrivateStart + 2,
135 };
136 
137 BUFFER_FNS(Pinned, pinned)
138 TAS_BUFFER_FNS(Pinned, pinned)
139 BUFFER_FNS(Escaped, escaped)
140 TAS_BUFFER_FNS(Escaped, escaped)
141 BUFFER_FNS(Zeronew, zeronew)
142 TAS_BUFFER_FNS(Zeronew, zeronew)
143 
144 struct gfs2_bufdata {
145         struct buffer_head *bd_bh;
146         struct gfs2_glock *bd_gl;
147         u64 bd_blkno;
148 
149         struct list_head bd_list;
150         const struct gfs2_log_operations *bd_ops;
151 
152         struct gfs2_trans *bd_tr;
153         struct list_head bd_ail_st_list;
154         struct list_head bd_ail_gl_list;
155 };
156 
157 /*
158  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
159  * prefix of lock_dlm_ gets awkward.
160  */
161 
162 #define GDLM_STRNAME_BYTES      25
163 #define GDLM_LVB_SIZE           32
164 
165 /*
166  * ls_recover_flags:
167  *
168  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
169  * held by failed nodes whose journals need recovery.  Those locks should
170  * only be used for journal recovery until the journal recovery is done.
171  * This is set by the dlm recover_prep callback and cleared by the
172  * gfs2_control thread when journal recovery is complete.  To avoid
173  * races between recover_prep setting and gfs2_control clearing, recover_spin
174  * is held while changing this bit and reading/writing recover_block
175  * and recover_start.
176  *
177  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
178  *
179  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
180  * recovery of all journals before allowing other nodes to mount the fs.
181  * This is cleared when FIRST_MOUNT_DONE is set.
182  *
183  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
184  * recovery of all journals, and now allows other nodes to mount the fs.
185  *
186  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
187  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
188  * control clearing BLOCK_LOCKS for further recoveries.
189  *
190  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
191  *
192  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
193  * and recover_done(), i.e. set while recover_block == recover_start.
194  */
195 
196 enum {
197         DFL_BLOCK_LOCKS         = 0,
198         DFL_NO_DLM_OPS          = 1,
199         DFL_FIRST_MOUNT         = 2,
200         DFL_FIRST_MOUNT_DONE    = 3,
201         DFL_MOUNT_DONE          = 4,
202         DFL_UNMOUNT             = 5,
203         DFL_DLM_RECOVERY        = 6,
204 };
205 
206 /*
207  * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
208  * the struct; padding at the end is fine.
209  */
210 struct lm_lockname {
211         u64 ln_number;
212         struct gfs2_sbd *ln_sbd;
213         unsigned int ln_type;
214 };
215 
216 #define lm_name_equal(name1, name2) \
217         (((name1)->ln_number == (name2)->ln_number) &&  \
218          ((name1)->ln_type == (name2)->ln_type) &&      \
219          ((name1)->ln_sbd == (name2)->ln_sbd))
220 
221 
222 struct gfs2_glock_operations {
223         void (*go_sync) (struct gfs2_glock *gl);
224         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
225         void (*go_inval) (struct gfs2_glock *gl, int flags);
226         int (*go_demote_ok) (const struct gfs2_glock *gl);
227         int (*go_lock) (struct gfs2_holder *gh);
228         void (*go_unlock) (struct gfs2_holder *gh);
229         void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
230         void (*go_callback)(struct gfs2_glock *gl, bool remote);
231         const int go_type;
232         const unsigned long go_flags;
233 #define GLOF_ASPACE 1
234 #define GLOF_LVB    2
235 #define GLOF_LRU    4
236 };
237 
238 enum {
239         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
240         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
241         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
242         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
243         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
244         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
245         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
246         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
247         GFS2_NR_LKSTATS
248 };
249 
250 struct gfs2_lkstats {
251         u64 stats[GFS2_NR_LKSTATS];
252 };
253 
254 enum {
255         /* States */
256         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
257         HIF_FIRST               = 7,
258         HIF_WAIT                = 10,
259 };
260 
261 struct gfs2_holder {
262         struct list_head gh_list;
263 
264         struct gfs2_glock *gh_gl;
265         struct pid *gh_owner_pid;
266         u16 gh_flags;
267         u16 gh_state;
268 
269         int gh_error;
270         unsigned long gh_iflags; /* HIF_... */
271         unsigned long gh_ip;
272 };
273 
274 /* Number of quota types we support */
275 #define GFS2_MAXQUOTAS 2
276 
277 struct gfs2_qadata { /* quota allocation data */
278         /* Quota stuff */
279         struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
280         struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
281         unsigned int qa_qd_num;
282 };
283 
284 /* Resource group multi-block reservation, in order of appearance:
285 
286    Step 1. Function prepares to write, allocates a mb, sets the size hint.
287    Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
288    Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
289    Step 4. Bits are assigned from the rgrp based on either the reservation
290            or wherever it can.
291 */
292 
293 struct gfs2_blkreserv {
294         /* components used during write (step 1): */
295         atomic_t rs_sizehint;         /* hint of the write size */
296 
297         struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
298         struct rb_node rs_node;       /* link to other block reservations */
299         struct gfs2_rbm rs_rbm;       /* Start of reservation */
300         u32 rs_free;                  /* how many blocks are still free */
301         u64 rs_inum;                  /* Inode number for reservation */
302 };
303 
304 /*
305  * Allocation parameters
306  * @target: The number of blocks we'd ideally like to allocate
307  * @aflags: The flags (e.g. Orlov flag)
308  *
309  * The intent is to gradually expand this structure over time in
310  * order to give more information, e.g. alignment, min extent size
311  * to the allocation code.
312  */
313 struct gfs2_alloc_parms {
314         u64 target;
315         u32 min_target;
316         u32 aflags;
317         u64 allowed;
318 };
319 
320 enum {
321         GLF_LOCK                        = 1,
322         GLF_DEMOTE                      = 3,
323         GLF_PENDING_DEMOTE              = 4,
324         GLF_DEMOTE_IN_PROGRESS          = 5,
325         GLF_DIRTY                       = 6,
326         GLF_LFLUSH                      = 7,
327         GLF_INVALIDATE_IN_PROGRESS      = 8,
328         GLF_REPLY_PENDING               = 9,
329         GLF_INITIAL                     = 10,
330         GLF_FROZEN                      = 11,
331         GLF_QUEUED                      = 12,
332         GLF_LRU                         = 13,
333         GLF_OBJECT                      = 14, /* Used only for tracing */
334         GLF_BLOCKING                    = 15,
335         GLF_INODE_CREATING              = 16, /* Inode creation occurring */
336 };
337 
338 struct gfs2_glock {
339         struct hlist_bl_node gl_list;
340         unsigned long gl_flags;         /* GLF_... */
341         struct lm_lockname gl_name;
342 
343         struct lockref gl_lockref;
344 
345         /* State fields protected by gl_lockref.lock */
346         unsigned int gl_state:2,        /* Current state */
347                      gl_target:2,       /* Target state */
348                      gl_demote_state:2, /* State requested by remote node */
349                      gl_req:2,          /* State in last dlm request */
350                      gl_reply:8;        /* Last reply from the dlm */
351 
352         unsigned long gl_demote_time; /* time of first demote request */
353         long gl_hold_time;
354         struct list_head gl_holders;
355 
356         const struct gfs2_glock_operations *gl_ops;
357         ktime_t gl_dstamp;
358         struct gfs2_lkstats gl_stats;
359         struct dlm_lksb gl_lksb;
360         unsigned long gl_tchange;
361         void *gl_object;
362 
363         struct list_head gl_lru;
364         struct list_head gl_ail_list;
365         atomic_t gl_ail_count;
366         atomic_t gl_revokes;
367         struct delayed_work gl_work;
368         union {
369                 /* For inode and iopen glocks only */
370                 struct work_struct gl_delete;
371                 /* For rgrp glocks only */
372                 struct {
373                         loff_t start;
374                         loff_t end;
375                 } gl_vm;
376         };
377         struct rcu_head gl_rcu;
378         struct rhash_head gl_node;
379 };
380 
381 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
382 
383 enum {
384         GIF_INVALID             = 0,
385         GIF_QD_LOCKED           = 1,
386         GIF_ALLOC_FAILED        = 2,
387         GIF_SW_PAGED            = 3,
388         GIF_ORDERED             = 4,
389         GIF_FREE_VFS_INODE      = 5,
390 };
391 
392 struct gfs2_inode {
393         struct inode i_inode;
394         u64 i_no_addr;
395         u64 i_no_formal_ino;
396         u64 i_generation;
397         u64 i_eattr;
398         unsigned long i_flags;          /* GIF_... */
399         struct gfs2_glock *i_gl; /* Move into i_gh? */
400         struct gfs2_holder i_iopen_gh;
401         struct gfs2_holder i_gh; /* for prepare/commit_write only */
402         struct gfs2_qadata *i_qadata; /* quota allocation data */
403         struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
404         struct gfs2_rgrpd *i_rgd;
405         u64 i_goal;     /* goal block for allocations */
406         struct rw_semaphore i_rw_mutex;
407         struct list_head i_ordered;
408         struct list_head i_trunc_list;
409         __be64 *i_hash_cache;
410         u32 i_entries;
411         u32 i_diskflags;
412         u8 i_height;
413         u8 i_depth;
414         u16 i_rahead;
415 };
416 
417 /*
418  * Since i_inode is the first element of struct gfs2_inode,
419  * this is effectively a cast.
420  */
421 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
422 {
423         return container_of(inode, struct gfs2_inode, i_inode);
424 }
425 
426 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
427 {
428         return inode->i_sb->s_fs_info;
429 }
430 
431 struct gfs2_file {
432         struct mutex f_fl_mutex;
433         struct gfs2_holder f_fl_gh;
434 };
435 
436 struct gfs2_revoke_replay {
437         struct list_head rr_list;
438         u64 rr_blkno;
439         unsigned int rr_where;
440 };
441 
442 enum {
443         QDF_CHANGE              = 1,
444         QDF_LOCKED              = 2,
445         QDF_REFRESH             = 3,
446         QDF_QMSG_QUIET          = 4,
447 };
448 
449 struct gfs2_quota_data {
450         struct hlist_bl_node qd_hlist;
451         struct list_head qd_list;
452         struct kqid qd_id;
453         struct gfs2_sbd *qd_sbd;
454         struct lockref qd_lockref;
455         struct list_head qd_lru;
456         unsigned qd_hash;
457 
458         unsigned long qd_flags;         /* QDF_... */
459 
460         s64 qd_change;
461         s64 qd_change_sync;
462 
463         unsigned int qd_slot;
464         unsigned int qd_slot_count;
465 
466         struct buffer_head *qd_bh;
467         struct gfs2_quota_change *qd_bh_qc;
468         unsigned int qd_bh_count;
469 
470         struct gfs2_glock *qd_gl;
471         struct gfs2_quota_lvb qd_qb;
472 
473         u64 qd_sync_gen;
474         unsigned long qd_last_warn;
475         struct rcu_head qd_rcu;
476 };
477 
478 enum {
479         TR_TOUCHED = 1,
480         TR_ATTACHED = 2,
481         TR_ALLOCED = 3,
482 };
483 
484 struct gfs2_trans {
485         unsigned long tr_ip;
486 
487         unsigned int tr_blocks;
488         unsigned int tr_revokes;
489         unsigned int tr_reserved;
490         unsigned long tr_flags;
491 
492         unsigned int tr_num_buf_new;
493         unsigned int tr_num_databuf_new;
494         unsigned int tr_num_buf_rm;
495         unsigned int tr_num_databuf_rm;
496         unsigned int tr_num_revoke;
497         unsigned int tr_num_revoke_rm;
498 
499         struct list_head tr_list;
500         struct list_head tr_databuf;
501         struct list_head tr_buf;
502 
503         unsigned int tr_first;
504         struct list_head tr_ail1_list;
505         struct list_head tr_ail2_list;
506 };
507 
508 struct gfs2_journal_extent {
509         struct list_head list;
510 
511         unsigned int lblock; /* First logical block */
512         u64 dblock; /* First disk block */
513         u64 blocks;
514 };
515 
516 struct gfs2_jdesc {
517         struct list_head jd_list;
518         struct list_head extent_list;
519         unsigned int nr_extents;
520         struct work_struct jd_work;
521         struct inode *jd_inode;
522         unsigned long jd_flags;
523 #define JDF_RECOVERY 1
524         unsigned int jd_jid;
525         unsigned int jd_blocks;
526         int jd_recover_error;
527         /* Replay stuff */
528 
529         unsigned int jd_found_blocks;
530         unsigned int jd_found_revokes;
531         unsigned int jd_replayed_blocks;
532 
533         struct list_head jd_revoke_list;
534         unsigned int jd_replay_tail;
535 
536 };
537 
538 struct gfs2_statfs_change_host {
539         s64 sc_total;
540         s64 sc_free;
541         s64 sc_dinodes;
542 };
543 
544 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
545 #define GFS2_QUOTA_OFF          0
546 #define GFS2_QUOTA_ACCOUNT      1
547 #define GFS2_QUOTA_ON           2
548 
549 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
550 #define GFS2_DATA_WRITEBACK     1
551 #define GFS2_DATA_ORDERED       2
552 
553 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
554 #define GFS2_ERRORS_WITHDRAW    0
555 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
556 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
557 #define GFS2_ERRORS_PANIC       3
558 
559 struct gfs2_args {
560         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
561         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
562         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
563         unsigned int ar_spectator:1;            /* Don't get a journal */
564         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
565         unsigned int ar_debug:1;                /* Oops on errors */
566         unsigned int ar_posix_acl:1;            /* Enable posix acls */
567         unsigned int ar_quota:2;                /* off/account/on */
568         unsigned int ar_suiddir:1;              /* suiddir support */
569         unsigned int ar_data:2;                 /* ordered/writeback */
570         unsigned int ar_meta:1;                 /* mount metafs */
571         unsigned int ar_discard:1;              /* discard requests */
572         unsigned int ar_errors:2;               /* errors=withdraw | panic */
573         unsigned int ar_nobarrier:1;            /* do not send barriers */
574         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
575         unsigned int ar_loccookie:1;            /* use location based readdir
576                                                    cookies */
577         int ar_commit;                          /* Commit interval */
578         int ar_statfs_quantum;                  /* The fast statfs interval */
579         int ar_quota_quantum;                   /* The quota interval */
580         int ar_statfs_percent;                  /* The % change to force sync */
581 };
582 
583 struct gfs2_tune {
584         spinlock_t gt_spin;
585 
586         unsigned int gt_logd_secs;
587 
588         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
589         unsigned int gt_quota_scale_num; /* Numerator */
590         unsigned int gt_quota_scale_den; /* Denominator */
591         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
592         unsigned int gt_new_files_jdata;
593         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
594         unsigned int gt_complain_secs;
595         unsigned int gt_statfs_quantum;
596         unsigned int gt_statfs_slow;
597 };
598 
599 enum {
600         SDF_JOURNAL_CHECKED     = 0,
601         SDF_JOURNAL_LIVE        = 1,
602         SDF_SHUTDOWN            = 2,
603         SDF_NOBARRIERS          = 3,
604         SDF_NORECOVERY          = 4,
605         SDF_DEMOTE              = 5,
606         SDF_NOJOURNALID         = 6,
607         SDF_RORECOVERY          = 7, /* read only recovery */
608         SDF_SKIP_DLM_UNLOCK     = 8,
609 };
610 
611 enum gfs2_freeze_state {
612         SFS_UNFROZEN            = 0,
613         SFS_STARTING_FREEZE     = 1,
614         SFS_FROZEN              = 2,
615 };
616 
617 #define GFS2_FSNAME_LEN         256
618 
619 struct gfs2_inum_host {
620         u64 no_formal_ino;
621         u64 no_addr;
622 };
623 
624 struct gfs2_sb_host {
625         u32 sb_magic;
626         u32 sb_type;
627         u32 sb_format;
628 
629         u32 sb_fs_format;
630         u32 sb_multihost_format;
631         u32 sb_bsize;
632         u32 sb_bsize_shift;
633 
634         struct gfs2_inum_host sb_master_dir;
635         struct gfs2_inum_host sb_root_dir;
636 
637         char sb_lockproto[GFS2_LOCKNAME_LEN];
638         char sb_locktable[GFS2_LOCKNAME_LEN];
639 };
640 
641 /*
642  * lm_mount() return values
643  *
644  * ls_jid - the journal ID this node should use
645  * ls_first - this node is the first to mount the file system
646  * ls_lockspace - lock module's context for this file system
647  * ls_ops - lock module's functions
648  */
649 
650 struct lm_lockstruct {
651         int ls_jid;
652         unsigned int ls_first;
653         const struct lm_lockops *ls_ops;
654         dlm_lockspace_t *ls_dlm;
655 
656         int ls_recover_jid_done;   /* These two are deprecated, */
657         int ls_recover_jid_status; /* used previously by gfs_controld */
658 
659         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
660         struct dlm_lksb ls_control_lksb; /* control_lock */
661         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
662         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
663         char *ls_lvb_bits;
664 
665         spinlock_t ls_recover_spin; /* protects following fields */
666         unsigned long ls_recover_flags; /* DFL_ */
667         uint32_t ls_recover_mount; /* gen in first recover_done cb */
668         uint32_t ls_recover_start; /* gen in last recover_done cb */
669         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
670         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
671         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
672         uint32_t *ls_recover_result; /* result of last jid recovery */
673 };
674 
675 struct gfs2_pcpu_lkstats {
676         /* One struct for each glock type */
677         struct gfs2_lkstats lkstats[10];
678 };
679 
680 struct gfs2_sbd {
681         struct super_block *sd_vfs;
682         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
683         struct kobject sd_kobj;
684         unsigned long sd_flags; /* SDF_... */
685         struct gfs2_sb_host sd_sb;
686 
687         /* Constants computed on mount */
688 
689         u32 sd_fsb2bb;
690         u32 sd_fsb2bb_shift;
691         u32 sd_diptrs;  /* Number of pointers in a dinode */
692         u32 sd_inptrs;  /* Number of pointers in a indirect block */
693         u32 sd_jbsize;  /* Size of a journaled data block */
694         u32 sd_hash_bsize;      /* sizeof(exhash block) */
695         u32 sd_hash_bsize_shift;
696         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
697         u32 sd_qc_per_block;
698         u32 sd_blocks_per_bitmap;
699         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
700         u32 sd_max_height;      /* Max height of a file's metadata tree */
701         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
702         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
703         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
704         u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
705 
706         struct gfs2_args sd_args;       /* Mount arguments */
707         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
708 
709         /* Lock Stuff */
710 
711         struct lm_lockstruct sd_lockstruct;
712         struct gfs2_holder sd_live_gh;
713         struct gfs2_glock *sd_rename_gl;
714         struct gfs2_glock *sd_freeze_gl;
715         struct work_struct sd_freeze_work;
716         wait_queue_head_t sd_glock_wait;
717         atomic_t sd_glock_disposal;
718         struct completion sd_locking_init;
719         struct completion sd_wdack;
720         struct delayed_work sd_control_work;
721 
722         /* Inode Stuff */
723 
724         struct dentry *sd_master_dir;
725         struct dentry *sd_root_dir;
726 
727         struct inode *sd_jindex;
728         struct inode *sd_statfs_inode;
729         struct inode *sd_sc_inode;
730         struct inode *sd_qc_inode;
731         struct inode *sd_rindex;
732         struct inode *sd_quota_inode;
733 
734         /* StatFS stuff */
735 
736         spinlock_t sd_statfs_spin;
737         struct gfs2_statfs_change_host sd_statfs_master;
738         struct gfs2_statfs_change_host sd_statfs_local;
739         int sd_statfs_force_sync;
740 
741         /* Resource group stuff */
742 
743         int sd_rindex_uptodate;
744         spinlock_t sd_rindex_spin;
745         struct rb_root sd_rindex_tree;
746         unsigned int sd_rgrps;
747         unsigned int sd_max_rg_data;
748 
749         /* Journal index stuff */
750 
751         struct list_head sd_jindex_list;
752         spinlock_t sd_jindex_spin;
753         struct mutex sd_jindex_mutex;
754         unsigned int sd_journals;
755 
756         struct gfs2_jdesc *sd_jdesc;
757         struct gfs2_holder sd_journal_gh;
758         struct gfs2_holder sd_jinode_gh;
759 
760         struct gfs2_holder sd_sc_gh;
761         struct gfs2_holder sd_qc_gh;
762 
763         struct completion sd_journal_ready;
764 
765         /* Daemon stuff */
766 
767         struct task_struct *sd_logd_process;
768         struct task_struct *sd_quotad_process;
769 
770         /* Quota stuff */
771 
772         struct list_head sd_quota_list;
773         atomic_t sd_quota_count;
774         struct mutex sd_quota_mutex;
775         struct mutex sd_quota_sync_mutex;
776         wait_queue_head_t sd_quota_wait;
777         struct list_head sd_trunc_list;
778         spinlock_t sd_trunc_lock;
779 
780         unsigned int sd_quota_slots;
781         unsigned long *sd_quota_bitmap;
782         spinlock_t sd_bitmap_lock;
783 
784         u64 sd_quota_sync_gen;
785 
786         /* Log stuff */
787 
788         struct address_space sd_aspace;
789 
790         spinlock_t sd_log_lock;
791 
792         struct gfs2_trans *sd_log_tr;
793         unsigned int sd_log_blks_reserved;
794         int sd_log_commited_revoke;
795 
796         atomic_t sd_log_pinned;
797         unsigned int sd_log_num_revoke;
798 
799         struct list_head sd_log_le_revoke;
800         struct list_head sd_log_le_ordered;
801         spinlock_t sd_ordered_lock;
802 
803         atomic_t sd_log_thresh1;
804         atomic_t sd_log_thresh2;
805         atomic_t sd_log_blks_free;
806         atomic_t sd_log_blks_needed;
807         wait_queue_head_t sd_log_waitq;
808         wait_queue_head_t sd_logd_waitq;
809 
810         u64 sd_log_sequence;
811         unsigned int sd_log_head;
812         unsigned int sd_log_tail;
813         int sd_log_idle;
814 
815         struct rw_semaphore sd_log_flush_lock;
816         atomic_t sd_log_in_flight;
817         struct bio *sd_log_bio;
818         wait_queue_head_t sd_log_flush_wait;
819         int sd_log_error;
820 
821         atomic_t sd_reserving_log;
822         wait_queue_head_t sd_reserving_log_wait;
823 
824         unsigned int sd_log_flush_head;
825         u64 sd_log_flush_wrapped;
826 
827         spinlock_t sd_ail_lock;
828         struct list_head sd_ail1_list;
829         struct list_head sd_ail2_list;
830 
831         /* For quiescing the filesystem */
832         struct gfs2_holder sd_freeze_gh;
833         atomic_t sd_freeze_state;
834         struct mutex sd_freeze_mutex;
835 
836         char sd_fsname[GFS2_FSNAME_LEN];
837         char sd_table_name[GFS2_FSNAME_LEN];
838         char sd_proto_name[GFS2_FSNAME_LEN];
839 
840         /* Debugging crud */
841 
842         unsigned long sd_last_warning;
843         struct dentry *debugfs_dir;    /* debugfs directory */
844         struct dentry *debugfs_dentry_glocks;
845         struct dentry *debugfs_dentry_glstats;
846         struct dentry *debugfs_dentry_sbstats;
847 };
848 
849 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
850 {
851         gl->gl_stats.stats[which]++;
852 }
853 
854 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
855 {
856         const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
857         preempt_disable();
858         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
859         preempt_enable();
860 }
861 
862 #endif /* __INCORE_DOT_H__ */
863 
864 

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