Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
cf45b752 | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
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 | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
5c676f6d | 14 | #include <linux/gfs2_ondisk.h> |
7d308590 | 15 | #include <linux/lm_interface.h> |
6802e340 | 16 | #include <linux/bio.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
20 | #include "bmap.h" |
21 | #include "glock.h" | |
22 | #include "glops.h" | |
23 | #include "inode.h" | |
24 | #include "log.h" | |
25 | #include "meta_io.h" | |
b3b94faa DT |
26 | #include "recovery.h" |
27 | #include "rgrp.h" | |
5c676f6d | 28 | #include "util.h" |
ddacfaf7 | 29 | #include "trans.h" |
b3b94faa | 30 | |
ddacfaf7 SW |
31 | /** |
32 | * ail_empty_gl - remove all buffers for a given lock from the AIL | |
33 | * @gl: the glock | |
34 | * | |
35 | * None of the buffers should be dirty, locked, or pinned. | |
36 | */ | |
37 | ||
38 | static void gfs2_ail_empty_gl(struct gfs2_glock *gl) | |
39 | { | |
40 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
41 | unsigned int blocks; | |
42 | struct list_head *head = &gl->gl_ail_list; | |
43 | struct gfs2_bufdata *bd; | |
44 | struct buffer_head *bh; | |
ddacfaf7 SW |
45 | int error; |
46 | ||
47 | blocks = atomic_read(&gl->gl_ail_count); | |
48 | if (!blocks) | |
49 | return; | |
50 | ||
51 | error = gfs2_trans_begin(sdp, 0, blocks); | |
52 | if (gfs2_assert_withdraw(sdp, !error)) | |
53 | return; | |
54 | ||
55 | gfs2_log_lock(sdp); | |
56 | while (!list_empty(head)) { | |
57 | bd = list_entry(head->next, struct gfs2_bufdata, | |
58 | bd_ail_gl_list); | |
59 | bh = bd->bd_bh; | |
f91a0d3e | 60 | gfs2_remove_from_ail(bd); |
1ad38c43 SW |
61 | bd->bd_bh = NULL; |
62 | bh->b_private = NULL; | |
63 | bd->bd_blkno = bh->b_blocknr; | |
64 | gfs2_assert_withdraw(sdp, !buffer_busy(bh)); | |
65 | gfs2_trans_add_revoke(sdp, bd); | |
ddacfaf7 SW |
66 | } |
67 | gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count)); | |
68 | gfs2_log_unlock(sdp); | |
69 | ||
70 | gfs2_trans_end(sdp); | |
71 | gfs2_log_flush(sdp, NULL); | |
72 | } | |
ba7f7290 SW |
73 | |
74 | /** | |
75 | * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock | |
76 | * @gl: the glock | |
77 | * | |
78 | */ | |
79 | ||
80 | static void gfs2_pte_inval(struct gfs2_glock *gl) | |
81 | { | |
82 | struct gfs2_inode *ip; | |
83 | struct inode *inode; | |
84 | ||
85 | ip = gl->gl_object; | |
86 | inode = &ip->i_inode; | |
b60623c2 | 87 | if (!ip || !S_ISREG(inode->i_mode)) |
ba7f7290 SW |
88 | return; |
89 | ||
ba7f7290 | 90 | unmap_shared_mapping_range(inode->i_mapping, 0, 0); |
ba7f7290 SW |
91 | if (test_bit(GIF_SW_PAGED, &ip->i_flags)) |
92 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
93 | ||
ba7f7290 SW |
94 | } |
95 | ||
b3b94faa DT |
96 | /** |
97 | * meta_go_sync - sync out the metadata for this glock | |
98 | * @gl: the glock | |
b3b94faa DT |
99 | * |
100 | * Called when demoting or unlocking an EX glock. We must flush | |
101 | * to disk all dirty buffers/pages relating to this glock, and must not | |
102 | * not return to caller to demote/unlock the glock until I/O is complete. | |
103 | */ | |
104 | ||
1a14d3a6 | 105 | static void meta_go_sync(struct gfs2_glock *gl) |
b3b94faa | 106 | { |
b5d32bea SW |
107 | if (gl->gl_state != LM_ST_EXCLUSIVE) |
108 | return; | |
109 | ||
b3b94faa | 110 | if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) { |
b09e593d | 111 | gfs2_log_flush(gl->gl_sbd, gl); |
7276b3b0 | 112 | gfs2_meta_sync(gl); |
1a14d3a6 | 113 | gfs2_ail_empty_gl(gl); |
b3b94faa | 114 | } |
b3b94faa DT |
115 | } |
116 | ||
117 | /** | |
118 | * meta_go_inval - invalidate the metadata for this glock | |
119 | * @gl: the glock | |
120 | * @flags: | |
121 | * | |
122 | */ | |
123 | ||
124 | static void meta_go_inval(struct gfs2_glock *gl, int flags) | |
125 | { | |
126 | if (!(flags & DIO_METADATA)) | |
127 | return; | |
128 | ||
129 | gfs2_meta_inval(gl); | |
cf45b752 BP |
130 | if (gl->gl_object == GFS2_I(gl->gl_sbd->sd_rindex)) |
131 | gl->gl_sbd->sd_rindex_uptodate = 0; | |
132 | else if (gl->gl_ops == &gfs2_rgrp_glops && gl->gl_object) { | |
133 | struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object; | |
134 | ||
135 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; | |
136 | } | |
b3b94faa DT |
137 | } |
138 | ||
b5d32bea SW |
139 | /** |
140 | * inode_go_sync - Sync the dirty data and/or metadata for an inode glock | |
141 | * @gl: the glock protecting the inode | |
142 | * | |
143 | */ | |
144 | ||
145 | static void inode_go_sync(struct gfs2_glock *gl) | |
146 | { | |
147 | struct gfs2_inode *ip = gl->gl_object; | |
3042a2cc SW |
148 | struct address_space *metamapping = gl->gl_aspace->i_mapping; |
149 | int error; | |
150 | ||
151 | if (gl->gl_state != LM_ST_UNLOCKED) | |
152 | gfs2_pte_inval(gl); | |
153 | if (gl->gl_state != LM_ST_EXCLUSIVE) | |
154 | return; | |
b5d32bea SW |
155 | |
156 | if (ip && !S_ISREG(ip->i_inode.i_mode)) | |
157 | ip = NULL; | |
158 | ||
159 | if (test_bit(GLF_DIRTY, &gl->gl_flags)) { | |
b524fe64 | 160 | gfs2_log_flush(gl->gl_sbd, gl); |
3042a2cc | 161 | filemap_fdatawrite(metamapping); |
b5d32bea SW |
162 | if (ip) { |
163 | struct address_space *mapping = ip->i_inode.i_mapping; | |
3042a2cc SW |
164 | filemap_fdatawrite(mapping); |
165 | error = filemap_fdatawait(mapping); | |
3e9f45bd | 166 | mapping_set_error(mapping, error); |
b5d32bea | 167 | } |
3042a2cc SW |
168 | error = filemap_fdatawait(metamapping); |
169 | mapping_set_error(metamapping, error); | |
b5d32bea SW |
170 | clear_bit(GLF_DIRTY, &gl->gl_flags); |
171 | gfs2_ail_empty_gl(gl); | |
172 | } | |
173 | } | |
174 | ||
b3b94faa DT |
175 | /** |
176 | * inode_go_inval - prepare a inode glock to be released | |
177 | * @gl: the glock | |
178 | * @flags: | |
179 | * | |
180 | */ | |
181 | ||
182 | static void inode_go_inval(struct gfs2_glock *gl, int flags) | |
183 | { | |
b004157a | 184 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa | 185 | int meta = (flags & DIO_METADATA); |
b3b94faa DT |
186 | |
187 | if (meta) { | |
188 | gfs2_meta_inval(gl); | |
b004157a SW |
189 | if (ip) |
190 | set_bit(GIF_INVALID, &ip->i_flags); | |
191 | } | |
192 | ||
3cc3f710 | 193 | if (ip && S_ISREG(ip->i_inode.i_mode)) |
b004157a | 194 | truncate_inode_pages(ip->i_inode.i_mapping, 0); |
b3b94faa DT |
195 | } |
196 | ||
197 | /** | |
198 | * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock | |
199 | * @gl: the glock | |
200 | * | |
201 | * Returns: 1 if it's ok | |
202 | */ | |
203 | ||
204 | static int inode_go_demote_ok(struct gfs2_glock *gl) | |
205 | { | |
206 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
207 | int demote = 0; | |
208 | ||
5c676f6d | 209 | if (!gl->gl_object && !gl->gl_aspace->i_mapping->nrpages) |
b3b94faa DT |
210 | demote = 1; |
211 | else if (!sdp->sd_args.ar_localcaching && | |
212 | time_after_eq(jiffies, gl->gl_stamp + | |
213 | gfs2_tune_get(sdp, gt_demote_secs) * HZ)) | |
214 | demote = 1; | |
215 | ||
216 | return demote; | |
217 | } | |
218 | ||
219 | /** | |
220 | * inode_go_lock - operation done after an inode lock is locked by a process | |
221 | * @gl: the glock | |
222 | * @flags: | |
223 | * | |
224 | * Returns: errno | |
225 | */ | |
226 | ||
227 | static int inode_go_lock(struct gfs2_holder *gh) | |
228 | { | |
229 | struct gfs2_glock *gl = gh->gh_gl; | |
5c676f6d | 230 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa DT |
231 | int error = 0; |
232 | ||
091806ed | 233 | if (!ip || (gh->gh_flags & GL_SKIP)) |
b3b94faa DT |
234 | return 0; |
235 | ||
bfded27b | 236 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
b3b94faa DT |
237 | error = gfs2_inode_refresh(ip); |
238 | if (error) | |
239 | return error; | |
b3b94faa DT |
240 | } |
241 | ||
242 | if ((ip->i_di.di_flags & GFS2_DIF_TRUNC_IN_PROG) && | |
243 | (gl->gl_state == LM_ST_EXCLUSIVE) && | |
1c0f4872 | 244 | (gh->gh_state == LM_ST_EXCLUSIVE)) |
b3b94faa DT |
245 | error = gfs2_truncatei_resume(ip); |
246 | ||
247 | return error; | |
248 | } | |
249 | ||
6802e340 SW |
250 | /** |
251 | * inode_go_dump - print information about an inode | |
252 | * @seq: The iterator | |
253 | * @ip: the inode | |
254 | * | |
255 | * Returns: 0 on success, -ENOBUFS when we run out of space | |
256 | */ | |
257 | ||
258 | static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl) | |
259 | { | |
260 | const struct gfs2_inode *ip = gl->gl_object; | |
261 | if (ip == NULL) | |
262 | return 0; | |
263 | gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%08lx\n", | |
264 | (unsigned long long)ip->i_no_formal_ino, | |
265 | (unsigned long long)ip->i_no_addr, | |
266 | IF2DT(ip->i_inode.i_mode), ip->i_flags); | |
267 | return 0; | |
268 | } | |
269 | ||
b3b94faa DT |
270 | /** |
271 | * rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock | |
272 | * @gl: the glock | |
273 | * | |
274 | * Returns: 1 if it's ok | |
275 | */ | |
276 | ||
277 | static int rgrp_go_demote_ok(struct gfs2_glock *gl) | |
278 | { | |
279 | return !gl->gl_aspace->i_mapping->nrpages; | |
280 | } | |
281 | ||
282 | /** | |
283 | * rgrp_go_lock - operation done after an rgrp lock is locked by | |
284 | * a first holder on this node. | |
285 | * @gl: the glock | |
286 | * @flags: | |
287 | * | |
288 | * Returns: errno | |
289 | */ | |
290 | ||
291 | static int rgrp_go_lock(struct gfs2_holder *gh) | |
292 | { | |
5c676f6d | 293 | return gfs2_rgrp_bh_get(gh->gh_gl->gl_object); |
b3b94faa DT |
294 | } |
295 | ||
296 | /** | |
297 | * rgrp_go_unlock - operation done before an rgrp lock is unlocked by | |
298 | * a last holder on this node. | |
299 | * @gl: the glock | |
300 | * @flags: | |
301 | * | |
302 | */ | |
303 | ||
304 | static void rgrp_go_unlock(struct gfs2_holder *gh) | |
305 | { | |
5c676f6d | 306 | gfs2_rgrp_bh_put(gh->gh_gl->gl_object); |
b3b94faa DT |
307 | } |
308 | ||
6802e340 SW |
309 | /** |
310 | * rgrp_go_dump - print out an rgrp | |
311 | * @seq: The iterator | |
312 | * @gl: The glock in question | |
313 | * | |
314 | */ | |
315 | ||
316 | static int rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl) | |
317 | { | |
318 | const struct gfs2_rgrpd *rgd = gl->gl_object; | |
319 | if (rgd == NULL) | |
320 | return 0; | |
321 | gfs2_print_dbg(seq, " R: n:%llu\n", (unsigned long long)rgd->rd_addr); | |
322 | return 0; | |
323 | } | |
324 | ||
b3b94faa | 325 | /** |
3042a2cc | 326 | * trans_go_sync - promote/demote the transaction glock |
b3b94faa DT |
327 | * @gl: the glock |
328 | * @state: the requested state | |
329 | * @flags: | |
330 | * | |
331 | */ | |
332 | ||
3042a2cc | 333 | static void trans_go_sync(struct gfs2_glock *gl) |
b3b94faa DT |
334 | { |
335 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
336 | ||
337 | if (gl->gl_state != LM_ST_UNLOCKED && | |
338 | test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
339 | gfs2_meta_syncfs(sdp); | |
340 | gfs2_log_shutdown(sdp); | |
341 | } | |
b3b94faa DT |
342 | } |
343 | ||
344 | /** | |
345 | * trans_go_xmote_bh - After promoting/demoting the transaction glock | |
346 | * @gl: the glock | |
347 | * | |
348 | */ | |
349 | ||
6802e340 | 350 | static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh) |
b3b94faa DT |
351 | { |
352 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
feaa7bba | 353 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 354 | struct gfs2_glock *j_gl = ip->i_gl; |
55167622 | 355 | struct gfs2_log_header_host head; |
b3b94faa DT |
356 | int error; |
357 | ||
6802e340 | 358 | if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { |
1a14d3a6 | 359 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
360 | |
361 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
362 | if (error) | |
363 | gfs2_consist(sdp); | |
364 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) | |
365 | gfs2_consist(sdp); | |
366 | ||
367 | /* Initialize some head of the log stuff */ | |
368 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { | |
369 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
370 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
371 | } | |
372 | } | |
6802e340 | 373 | return 0; |
b3b94faa DT |
374 | } |
375 | ||
b3b94faa DT |
376 | /** |
377 | * quota_go_demote_ok - Check to see if it's ok to unlock a quota glock | |
378 | * @gl: the glock | |
379 | * | |
380 | * Returns: 1 if it's ok | |
381 | */ | |
382 | ||
383 | static int quota_go_demote_ok(struct gfs2_glock *gl) | |
384 | { | |
385 | return !atomic_read(&gl->gl_lvb_count); | |
386 | } | |
387 | ||
8fb4b536 | 388 | const struct gfs2_glock_operations gfs2_meta_glops = { |
b5d32bea | 389 | .go_xmote_th = meta_go_sync, |
ea67eedb | 390 | .go_type = LM_TYPE_META, |
b3b94faa DT |
391 | }; |
392 | ||
8fb4b536 | 393 | const struct gfs2_glock_operations gfs2_inode_glops = { |
3042a2cc | 394 | .go_xmote_th = inode_go_sync, |
b3b94faa DT |
395 | .go_inval = inode_go_inval, |
396 | .go_demote_ok = inode_go_demote_ok, | |
397 | .go_lock = inode_go_lock, | |
6802e340 | 398 | .go_dump = inode_go_dump, |
ea67eedb | 399 | .go_type = LM_TYPE_INODE, |
6802e340 | 400 | .go_min_hold_time = HZ / 5, |
b3b94faa DT |
401 | }; |
402 | ||
8fb4b536 | 403 | const struct gfs2_glock_operations gfs2_rgrp_glops = { |
cad5b939 | 404 | .go_xmote_th = meta_go_sync, |
b3b94faa DT |
405 | .go_inval = meta_go_inval, |
406 | .go_demote_ok = rgrp_go_demote_ok, | |
407 | .go_lock = rgrp_go_lock, | |
408 | .go_unlock = rgrp_go_unlock, | |
6802e340 | 409 | .go_dump = rgrp_go_dump, |
ea67eedb | 410 | .go_type = LM_TYPE_RGRP, |
6802e340 | 411 | .go_min_hold_time = HZ / 5, |
b3b94faa DT |
412 | }; |
413 | ||
8fb4b536 | 414 | const struct gfs2_glock_operations gfs2_trans_glops = { |
3042a2cc | 415 | .go_xmote_th = trans_go_sync, |
b3b94faa | 416 | .go_xmote_bh = trans_go_xmote_bh, |
ea67eedb | 417 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
418 | }; |
419 | ||
8fb4b536 | 420 | const struct gfs2_glock_operations gfs2_iopen_glops = { |
ea67eedb | 421 | .go_type = LM_TYPE_IOPEN, |
b3b94faa DT |
422 | }; |
423 | ||
8fb4b536 | 424 | const struct gfs2_glock_operations gfs2_flock_glops = { |
ea67eedb | 425 | .go_type = LM_TYPE_FLOCK, |
b3b94faa DT |
426 | }; |
427 | ||
8fb4b536 | 428 | const struct gfs2_glock_operations gfs2_nondisk_glops = { |
ea67eedb | 429 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
430 | }; |
431 | ||
8fb4b536 | 432 | const struct gfs2_glock_operations gfs2_quota_glops = { |
b3b94faa | 433 | .go_demote_ok = quota_go_demote_ok, |
ea67eedb | 434 | .go_type = LM_TYPE_QUOTA, |
b3b94faa DT |
435 | }; |
436 | ||
8fb4b536 | 437 | const struct gfs2_glock_operations gfs2_journal_glops = { |
ea67eedb | 438 | .go_type = LM_TYPE_JOURNAL, |
b3b94faa DT |
439 | }; |
440 |