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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 | 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 |