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

Version: ~ [ linux-5.5-rc1 ] ~ [ linux-5.4.2 ] ~ [ linux-5.3.15 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.88 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.158 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.206 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.206 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.78 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 struct lm_lockname {
207         struct gfs2_sbd *ln_sbd;
208         u64 ln_number;
209         unsigned int ln_type;
210 };
211 
212 #define lm_name_equal(name1, name2) \
213         (((name1)->ln_number == (name2)->ln_number) &&  \
214          ((name1)->ln_type == (name2)->ln_type) &&      \
215          ((name1)->ln_sbd == (name2)->ln_sbd))
216 
217 
218 struct gfs2_glock_operations {
219         void (*go_sync) (struct gfs2_glock *gl);
220         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
221         void (*go_inval) (struct gfs2_glock *gl, int flags);
222         int (*go_demote_ok) (const struct gfs2_glock *gl);
223         int (*go_lock) (struct gfs2_holder *gh);
224         void (*go_unlock) (struct gfs2_holder *gh);
225         void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
226         void (*go_callback)(struct gfs2_glock *gl, bool remote);
227         const int go_type;
228         const unsigned long go_flags;
229 #define GLOF_ASPACE 1
230 #define GLOF_LVB    2
231 #define GLOF_LRU    4
232 };
233 
234 enum {
235         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
236         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
237         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
238         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
239         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
240         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
241         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
242         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
243         GFS2_NR_LKSTATS
244 };
245 
246 struct gfs2_lkstats {
247         u64 stats[GFS2_NR_LKSTATS];
248 };
249 
250 enum {
251         /* States */
252         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
253         HIF_FIRST               = 7,
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 };
279 
280 /* Resource group multi-block reservation, in order of appearance:
281 
282    Step 1. Function prepares to write, allocates a mb, sets the size hint.
283    Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
284    Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
285    Step 4. Bits are assigned from the rgrp based on either the reservation
286            or wherever it can.
287 */
288 
289 struct gfs2_blkreserv {
290         /* components used during write (step 1): */
291         atomic_t rs_sizehint;         /* hint of the write size */
292 
293         struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
294         struct rb_node rs_node;       /* link to other block reservations */
295         struct gfs2_rbm rs_rbm;       /* Start of reservation */
296         u32 rs_free;                  /* how many blocks are still free */
297         u64 rs_inum;                  /* Inode number for reservation */
298 };
299 
300 /*
301  * Allocation parameters
302  * @target: The number of blocks we'd ideally like to allocate
303  * @aflags: The flags (e.g. Orlov flag)
304  *
305  * The intent is to gradually expand this structure over time in
306  * order to give more information, e.g. alignment, min extent size
307  * to the allocation code.
308  */
309 struct gfs2_alloc_parms {
310         u64 target;
311         u32 min_target;
312         u32 aflags;
313         u64 allowed;
314 };
315 
316 enum {
317         GLF_LOCK                        = 1,
318         GLF_DEMOTE                      = 3,
319         GLF_PENDING_DEMOTE              = 4,
320         GLF_DEMOTE_IN_PROGRESS          = 5,
321         GLF_DIRTY                       = 6,
322         GLF_LFLUSH                      = 7,
323         GLF_INVALIDATE_IN_PROGRESS      = 8,
324         GLF_REPLY_PENDING               = 9,
325         GLF_INITIAL                     = 10,
326         GLF_FROZEN                      = 11,
327         GLF_QUEUED                      = 12,
328         GLF_LRU                         = 13,
329         GLF_OBJECT                      = 14, /* Used only for tracing */
330         GLF_BLOCKING                    = 15,
331         GLF_INODE_CREATING              = 16, /* Inode creation occurring */
332 };
333 
334 struct gfs2_glock {
335         struct hlist_bl_node gl_list;
336         unsigned long gl_flags;         /* GLF_... */
337         struct lm_lockname gl_name;
338 
339         struct lockref gl_lockref;
340 
341         /* State fields protected by gl_lockref.lock */
342         unsigned int gl_state:2,        /* Current state */
343                      gl_target:2,       /* Target state */
344                      gl_demote_state:2, /* State requested by remote node */
345                      gl_req:2,          /* State in last dlm request */
346                      gl_reply:8;        /* Last reply from the dlm */
347 
348         unsigned long gl_demote_time; /* time of first demote request */
349         long gl_hold_time;
350         struct list_head gl_holders;
351 
352         const struct gfs2_glock_operations *gl_ops;
353         ktime_t gl_dstamp;
354         struct gfs2_lkstats gl_stats;
355         struct dlm_lksb gl_lksb;
356         unsigned long gl_tchange;
357         void *gl_object;
358 
359         struct list_head gl_lru;
360         struct list_head gl_ail_list;
361         atomic_t gl_ail_count;
362         atomic_t gl_revokes;
363         struct delayed_work gl_work;
364         union {
365                 /* For inode and iopen glocks only */
366                 struct work_struct gl_delete;
367                 /* For rgrp glocks only */
368                 struct {
369                         loff_t start;
370                         loff_t end;
371                 } gl_vm;
372         };
373         struct rhash_head gl_node;
374 };
375 
376 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
377 
378 enum {
379         GIF_INVALID             = 0,
380         GIF_QD_LOCKED           = 1,
381         GIF_ALLOC_FAILED        = 2,
382         GIF_SW_PAGED            = 3,
383         GIF_ORDERED             = 4,
384         GIF_FREE_VFS_INODE      = 5,
385 };
386 
387 struct gfs2_inode {
388         struct inode i_inode;
389         u64 i_no_addr;
390         u64 i_no_formal_ino;
391         u64 i_generation;
392         u64 i_eattr;
393         unsigned long i_flags;          /* GIF_... */
394         struct gfs2_glock *i_gl; /* Move into i_gh? */
395         struct gfs2_holder i_iopen_gh;
396         struct gfs2_holder i_gh; /* for prepare/commit_write only */
397         struct gfs2_qadata *i_qadata; /* quota allocation data */
398         struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
399         struct gfs2_rgrpd *i_rgd;
400         u64 i_goal;     /* goal block for allocations */
401         struct rw_semaphore i_rw_mutex;
402         struct list_head i_ordered;
403         struct list_head i_trunc_list;
404         __be64 *i_hash_cache;
405         u32 i_entries;
406         u32 i_diskflags;
407         u8 i_height;
408         u8 i_depth;
409         u16 i_rahead;
410 };
411 
412 /*
413  * Since i_inode is the first element of struct gfs2_inode,
414  * this is effectively a cast.
415  */
416 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
417 {
418         return container_of(inode, struct gfs2_inode, i_inode);
419 }
420 
421 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
422 {
423         return inode->i_sb->s_fs_info;
424 }
425 
426 struct gfs2_file {
427         struct mutex f_fl_mutex;
428         struct gfs2_holder f_fl_gh;
429 };
430 
431 struct gfs2_revoke_replay {
432         struct list_head rr_list;
433         u64 rr_blkno;
434         unsigned int rr_where;
435 };
436 
437 enum {
438         QDF_CHANGE              = 1,
439         QDF_LOCKED              = 2,
440         QDF_REFRESH             = 3,
441         QDF_QMSG_QUIET          = 4,
442 };
443 
444 struct gfs2_quota_data {
445         struct hlist_bl_node qd_hlist;
446         struct list_head qd_list;
447         struct kqid qd_id;
448         struct gfs2_sbd *qd_sbd;
449         struct lockref qd_lockref;
450         struct list_head qd_lru;
451         unsigned qd_hash;
452 
453         unsigned long qd_flags;         /* QDF_... */
454 
455         s64 qd_change;
456         s64 qd_change_sync;
457 
458         unsigned int qd_slot;
459         unsigned int qd_slot_count;
460 
461         struct buffer_head *qd_bh;
462         struct gfs2_quota_change *qd_bh_qc;
463         unsigned int qd_bh_count;
464 
465         struct gfs2_glock *qd_gl;
466         struct gfs2_quota_lvb qd_qb;
467 
468         u64 qd_sync_gen;
469         unsigned long qd_last_warn;
470         struct rcu_head qd_rcu;
471 };
472 
473 struct gfs2_trans {
474         unsigned long tr_ip;
475 
476         unsigned int tr_blocks;
477         unsigned int tr_revokes;
478         unsigned int tr_reserved;
479         unsigned int tr_touched:1;
480         unsigned int tr_attached:1;
481         unsigned int tr_alloced:1;
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         unsigned int tr_num_revoke_rm;
489 
490         struct list_head tr_list;
491         struct list_head tr_databuf;
492         struct list_head tr_buf;
493 
494         unsigned int tr_first;
495         struct list_head tr_ail1_list;
496         struct list_head tr_ail2_list;
497 };
498 
499 struct gfs2_journal_extent {
500         struct list_head list;
501 
502         unsigned int lblock; /* First logical block */
503         u64 dblock; /* First disk block */
504         u64 blocks;
505 };
506 
507 struct gfs2_jdesc {
508         struct list_head jd_list;
509         struct list_head extent_list;
510         unsigned int nr_extents;
511         struct work_struct jd_work;
512         struct inode *jd_inode;
513         unsigned long jd_flags;
514 #define JDF_RECOVERY 1
515         unsigned int jd_jid;
516         unsigned int 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 };
528 
529 struct gfs2_statfs_change_host {
530         s64 sc_total;
531         s64 sc_free;
532         s64 sc_dinodes;
533 };
534 
535 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
536 #define GFS2_QUOTA_OFF          0
537 #define GFS2_QUOTA_ACCOUNT      1
538 #define GFS2_QUOTA_ON           2
539 
540 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
541 #define GFS2_DATA_WRITEBACK     1
542 #define GFS2_DATA_ORDERED       2
543 
544 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
545 #define GFS2_ERRORS_WITHDRAW    0
546 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
547 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
548 #define GFS2_ERRORS_PANIC       3
549 
550 struct gfs2_args {
551         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
552         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
553         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
554         unsigned int ar_spectator:1;            /* Don't get a journal */
555         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
556         unsigned int ar_debug:1;                /* Oops on errors */
557         unsigned int ar_posix_acl:1;            /* Enable posix acls */
558         unsigned int ar_quota:2;                /* off/account/on */
559         unsigned int ar_suiddir:1;              /* suiddir support */
560         unsigned int ar_data:2;                 /* ordered/writeback */
561         unsigned int ar_meta:1;                 /* mount metafs */
562         unsigned int ar_discard:1;              /* discard requests */
563         unsigned int ar_errors:2;               /* errors=withdraw | panic */
564         unsigned int ar_nobarrier:1;            /* do not send barriers */
565         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
566         unsigned int ar_loccookie:1;            /* use location based readdir
567                                                    cookies */
568         int ar_commit;                          /* Commit interval */
569         int ar_statfs_quantum;                  /* The fast statfs interval */
570         int ar_quota_quantum;                   /* The quota interval */
571         int ar_statfs_percent;                  /* The % change to force sync */
572 };
573 
574 struct gfs2_tune {
575         spinlock_t gt_spin;
576 
577         unsigned int gt_logd_secs;
578 
579         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
580         unsigned int gt_quota_scale_num; /* Numerator */
581         unsigned int gt_quota_scale_den; /* Denominator */
582         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
583         unsigned int gt_new_files_jdata;
584         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
585         unsigned int gt_complain_secs;
586         unsigned int gt_statfs_quantum;
587         unsigned int gt_statfs_slow;
588 };
589 
590 enum {
591         SDF_JOURNAL_CHECKED     = 0,
592         SDF_JOURNAL_LIVE        = 1,
593         SDF_SHUTDOWN            = 2,
594         SDF_NOBARRIERS          = 3,
595         SDF_NORECOVERY          = 4,
596         SDF_DEMOTE              = 5,
597         SDF_NOJOURNALID         = 6,
598         SDF_RORECOVERY          = 7, /* read only recovery */
599         SDF_SKIP_DLM_UNLOCK     = 8,
600 };
601 
602 enum gfs2_freeze_state {
603         SFS_UNFROZEN            = 0,
604         SFS_STARTING_FREEZE     = 1,
605         SFS_FROZEN              = 2,
606 };
607 
608 #define GFS2_FSNAME_LEN         256
609 
610 struct gfs2_inum_host {
611         u64 no_formal_ino;
612         u64 no_addr;
613 };
614 
615 struct gfs2_sb_host {
616         u32 sb_magic;
617         u32 sb_type;
618         u32 sb_format;
619 
620         u32 sb_fs_format;
621         u32 sb_multihost_format;
622         u32 sb_bsize;
623         u32 sb_bsize_shift;
624 
625         struct gfs2_inum_host sb_master_dir;
626         struct gfs2_inum_host sb_root_dir;
627 
628         char sb_lockproto[GFS2_LOCKNAME_LEN];
629         char sb_locktable[GFS2_LOCKNAME_LEN];
630 };
631 
632 /*
633  * lm_mount() return values
634  *
635  * ls_jid - the journal ID this node should use
636  * ls_first - this node is the first to mount the file system
637  * ls_lockspace - lock module's context for this file system
638  * ls_ops - lock module's functions
639  */
640 
641 struct lm_lockstruct {
642         int ls_jid;
643         unsigned int ls_first;
644         const struct lm_lockops *ls_ops;
645         dlm_lockspace_t *ls_dlm;
646 
647         int ls_recover_jid_done;   /* These two are deprecated, */
648         int ls_recover_jid_status; /* used previously by gfs_controld */
649 
650         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
651         struct dlm_lksb ls_control_lksb; /* control_lock */
652         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
653         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
654         char *ls_lvb_bits;
655 
656         spinlock_t ls_recover_spin; /* protects following fields */
657         unsigned long ls_recover_flags; /* DFL_ */
658         uint32_t ls_recover_mount; /* gen in first recover_done cb */
659         uint32_t ls_recover_start; /* gen in last recover_done cb */
660         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
661         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
662         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
663         uint32_t *ls_recover_result; /* result of last jid recovery */
664 };
665 
666 struct gfs2_pcpu_lkstats {
667         /* One struct for each glock type */
668         struct gfs2_lkstats lkstats[10];
669 };
670 
671 struct gfs2_sbd {
672         struct super_block *sd_vfs;
673         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
674         struct kobject sd_kobj;
675         unsigned long sd_flags; /* SDF_... */
676         struct gfs2_sb_host sd_sb;
677 
678         /* Constants computed on mount */
679 
680         u32 sd_fsb2bb;
681         u32 sd_fsb2bb_shift;
682         u32 sd_diptrs;  /* Number of pointers in a dinode */
683         u32 sd_inptrs;  /* Number of pointers in a indirect block */
684         u32 sd_jbsize;  /* Size of a journaled data block */
685         u32 sd_hash_bsize;      /* sizeof(exhash block) */
686         u32 sd_hash_bsize_shift;
687         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
688         u32 sd_qc_per_block;
689         u32 sd_blocks_per_bitmap;
690         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
691         u32 sd_max_height;      /* Max height of a file's metadata tree */
692         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
693         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
694         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
695         u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
696 
697         struct gfs2_args sd_args;       /* Mount arguments */
698         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
699 
700         /* Lock Stuff */
701 
702         struct lm_lockstruct sd_lockstruct;
703         struct gfs2_holder sd_live_gh;
704         struct gfs2_glock *sd_rename_gl;
705         struct gfs2_glock *sd_freeze_gl;
706         struct work_struct sd_freeze_work;
707         wait_queue_head_t sd_glock_wait;
708         atomic_t sd_glock_disposal;
709         struct completion sd_locking_init;
710         struct completion sd_wdack;
711         struct delayed_work sd_control_work;
712 
713         /* Inode Stuff */
714 
715         struct dentry *sd_master_dir;
716         struct dentry *sd_root_dir;
717 
718         struct inode *sd_jindex;
719         struct inode *sd_statfs_inode;
720         struct inode *sd_sc_inode;
721         struct inode *sd_qc_inode;
722         struct inode *sd_rindex;
723         struct inode *sd_quota_inode;
724 
725         /* StatFS stuff */
726 
727         spinlock_t sd_statfs_spin;
728         struct gfs2_statfs_change_host sd_statfs_master;
729         struct gfs2_statfs_change_host sd_statfs_local;
730         int sd_statfs_force_sync;
731 
732         /* Resource group stuff */
733 
734         int sd_rindex_uptodate;
735         spinlock_t sd_rindex_spin;
736         struct rb_root sd_rindex_tree;
737         unsigned int sd_rgrps;
738         unsigned int sd_max_rg_data;
739 
740         /* Journal index stuff */
741 
742         struct list_head sd_jindex_list;
743         spinlock_t sd_jindex_spin;
744         struct mutex sd_jindex_mutex;
745         unsigned int sd_journals;
746 
747         struct gfs2_jdesc *sd_jdesc;
748         struct gfs2_holder sd_journal_gh;
749         struct gfs2_holder sd_jinode_gh;
750 
751         struct gfs2_holder sd_sc_gh;
752         struct gfs2_holder sd_qc_gh;
753 
754         struct completion sd_journal_ready;
755 
756         /* Daemon stuff */
757 
758         struct task_struct *sd_logd_process;
759         struct task_struct *sd_quotad_process;
760 
761         /* Quota stuff */
762 
763         struct list_head sd_quota_list;
764         atomic_t sd_quota_count;
765         struct mutex sd_quota_mutex;
766         struct mutex sd_quota_sync_mutex;
767         wait_queue_head_t sd_quota_wait;
768         struct list_head sd_trunc_list;
769         spinlock_t sd_trunc_lock;
770 
771         unsigned int sd_quota_slots;
772         unsigned long *sd_quota_bitmap;
773         spinlock_t sd_bitmap_lock;
774 
775         u64 sd_quota_sync_gen;
776 
777         /* Log stuff */
778 
779         struct address_space sd_aspace;
780 
781         spinlock_t sd_log_lock;
782 
783         struct gfs2_trans *sd_log_tr;
784         unsigned int sd_log_blks_reserved;
785         int sd_log_commited_revoke;
786 
787         atomic_t sd_log_pinned;
788         unsigned int sd_log_num_revoke;
789 
790         struct list_head sd_log_le_revoke;
791         struct list_head sd_log_le_ordered;
792         spinlock_t sd_ordered_lock;
793 
794         atomic_t sd_log_thresh1;
795         atomic_t sd_log_thresh2;
796         atomic_t sd_log_blks_free;
797         wait_queue_head_t sd_log_waitq;
798         wait_queue_head_t sd_logd_waitq;
799 
800         u64 sd_log_sequence;
801         unsigned int sd_log_head;
802         unsigned int sd_log_tail;
803         int sd_log_idle;
804 
805         struct rw_semaphore sd_log_flush_lock;
806         atomic_t sd_log_in_flight;
807         struct bio *sd_log_bio;
808         wait_queue_head_t sd_log_flush_wait;
809         int sd_log_error;
810 
811         atomic_t sd_reserving_log;
812         wait_queue_head_t sd_reserving_log_wait;
813 
814         unsigned int sd_log_flush_head;
815         u64 sd_log_flush_wrapped;
816 
817         spinlock_t sd_ail_lock;
818         struct list_head sd_ail1_list;
819         struct list_head sd_ail2_list;
820 
821         /* For quiescing the filesystem */
822         struct gfs2_holder sd_freeze_gh;
823         atomic_t sd_freeze_state;
824         struct mutex sd_freeze_mutex;
825 
826         char sd_fsname[GFS2_FSNAME_LEN];
827         char sd_table_name[GFS2_FSNAME_LEN];
828         char sd_proto_name[GFS2_FSNAME_LEN];
829 
830         /* Debugging crud */
831 
832         unsigned long sd_last_warning;
833         struct dentry *debugfs_dir;    /* debugfs directory */
834         struct dentry *debugfs_dentry_glocks;
835         struct dentry *debugfs_dentry_glstats;
836         struct dentry *debugfs_dentry_sbstats;
837 };
838 
839 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
840 {
841         gl->gl_stats.stats[which]++;
842 }
843 
844 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
845 {
846         const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
847         preempt_disable();
848         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
849         preempt_enable();
850 }
851 
852 #endif /* __INCORE_DOT_H__ */
853 
854 

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