Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 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> |
b3b94faa DT |
16 | |
17 | #include "gfs2.h" | |
5c676f6d | 18 | #include "incore.h" |
b3b94faa DT |
19 | #include "bmap.h" |
20 | #include "glock.h" | |
21 | #include "glops.h" | |
22 | #include "inode.h" | |
23 | #include "log.h" | |
24 | #include "meta_io.h" | |
b3b94faa DT |
25 | #include "recovery.h" |
26 | #include "rgrp.h" | |
5c676f6d | 27 | #include "util.h" |
ddacfaf7 | 28 | #include "trans.h" |
b3b94faa | 29 | |
ddacfaf7 SW |
30 | /** |
31 | * ail_empty_gl - remove all buffers for a given lock from the AIL | |
32 | * @gl: the glock | |
33 | * | |
34 | * None of the buffers should be dirty, locked, or pinned. | |
35 | */ | |
36 | ||
37 | static void gfs2_ail_empty_gl(struct gfs2_glock *gl) | |
38 | { | |
39 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
40 | unsigned int blocks; | |
41 | struct list_head *head = &gl->gl_ail_list; | |
42 | struct gfs2_bufdata *bd; | |
43 | struct buffer_head *bh; | |
ddacfaf7 SW |
44 | int error; |
45 | ||
46 | blocks = atomic_read(&gl->gl_ail_count); | |
47 | if (!blocks) | |
48 | return; | |
49 | ||
50 | error = gfs2_trans_begin(sdp, 0, blocks); | |
51 | if (gfs2_assert_withdraw(sdp, !error)) | |
52 | return; | |
53 | ||
54 | gfs2_log_lock(sdp); | |
55 | while (!list_empty(head)) { | |
56 | bd = list_entry(head->next, struct gfs2_bufdata, | |
57 | bd_ail_gl_list); | |
58 | bh = bd->bd_bh; | |
f91a0d3e | 59 | gfs2_remove_from_ail(bd); |
1ad38c43 SW |
60 | bd->bd_bh = NULL; |
61 | bh->b_private = NULL; | |
62 | bd->bd_blkno = bh->b_blocknr; | |
63 | gfs2_assert_withdraw(sdp, !buffer_busy(bh)); | |
64 | gfs2_trans_add_revoke(sdp, bd); | |
ddacfaf7 SW |
65 | } |
66 | gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count)); | |
67 | gfs2_log_unlock(sdp); | |
68 | ||
69 | gfs2_trans_end(sdp); | |
70 | gfs2_log_flush(sdp, NULL); | |
71 | } | |
ba7f7290 SW |
72 | |
73 | /** | |
74 | * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock | |
75 | * @gl: the glock | |
76 | * | |
77 | */ | |
78 | ||
79 | static void gfs2_pte_inval(struct gfs2_glock *gl) | |
80 | { | |
81 | struct gfs2_inode *ip; | |
82 | struct inode *inode; | |
83 | ||
84 | ip = gl->gl_object; | |
85 | inode = &ip->i_inode; | |
b60623c2 | 86 | if (!ip || !S_ISREG(inode->i_mode)) |
ba7f7290 SW |
87 | return; |
88 | ||
ba7f7290 | 89 | unmap_shared_mapping_range(inode->i_mapping, 0, 0); |
ba7f7290 SW |
90 | if (test_bit(GIF_SW_PAGED, &ip->i_flags)) |
91 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
92 | ||
ba7f7290 SW |
93 | } |
94 | ||
b3b94faa DT |
95 | /** |
96 | * meta_go_sync - sync out the metadata for this glock | |
97 | * @gl: the glock | |
b3b94faa DT |
98 | * |
99 | * Called when demoting or unlocking an EX glock. We must flush | |
100 | * to disk all dirty buffers/pages relating to this glock, and must not | |
101 | * not return to caller to demote/unlock the glock until I/O is complete. | |
102 | */ | |
103 | ||
1a14d3a6 | 104 | static void meta_go_sync(struct gfs2_glock *gl) |
b3b94faa | 105 | { |
b5d32bea SW |
106 | if (gl->gl_state != LM_ST_EXCLUSIVE) |
107 | return; | |
108 | ||
b3b94faa | 109 | if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) { |
b09e593d | 110 | gfs2_log_flush(gl->gl_sbd, gl); |
7276b3b0 | 111 | gfs2_meta_sync(gl); |
1a14d3a6 | 112 | gfs2_ail_empty_gl(gl); |
b3b94faa | 113 | } |
b3b94faa DT |
114 | } |
115 | ||
116 | /** | |
117 | * meta_go_inval - invalidate the metadata for this glock | |
118 | * @gl: the glock | |
119 | * @flags: | |
120 | * | |
121 | */ | |
122 | ||
123 | static void meta_go_inval(struct gfs2_glock *gl, int flags) | |
124 | { | |
125 | if (!(flags & DIO_METADATA)) | |
126 | return; | |
127 | ||
128 | gfs2_meta_inval(gl); | |
129 | gl->gl_vn++; | |
130 | } | |
131 | ||
b5d32bea SW |
132 | /** |
133 | * inode_go_sync - Sync the dirty data and/or metadata for an inode glock | |
134 | * @gl: the glock protecting the inode | |
135 | * | |
136 | */ | |
137 | ||
138 | static void inode_go_sync(struct gfs2_glock *gl) | |
139 | { | |
140 | struct gfs2_inode *ip = gl->gl_object; | |
3042a2cc SW |
141 | struct address_space *metamapping = gl->gl_aspace->i_mapping; |
142 | int error; | |
143 | ||
144 | if (gl->gl_state != LM_ST_UNLOCKED) | |
145 | gfs2_pte_inval(gl); | |
146 | if (gl->gl_state != LM_ST_EXCLUSIVE) | |
147 | return; | |
b5d32bea SW |
148 | |
149 | if (ip && !S_ISREG(ip->i_inode.i_mode)) | |
150 | ip = NULL; | |
151 | ||
152 | if (test_bit(GLF_DIRTY, &gl->gl_flags)) { | |
b524fe64 | 153 | gfs2_log_flush(gl->gl_sbd, gl); |
3042a2cc | 154 | filemap_fdatawrite(metamapping); |
b5d32bea SW |
155 | if (ip) { |
156 | struct address_space *mapping = ip->i_inode.i_mapping; | |
3042a2cc SW |
157 | filemap_fdatawrite(mapping); |
158 | error = filemap_fdatawait(mapping); | |
3e9f45bd | 159 | mapping_set_error(mapping, error); |
b5d32bea | 160 | } |
3042a2cc SW |
161 | error = filemap_fdatawait(metamapping); |
162 | mapping_set_error(metamapping, error); | |
b5d32bea SW |
163 | clear_bit(GLF_DIRTY, &gl->gl_flags); |
164 | gfs2_ail_empty_gl(gl); | |
165 | } | |
166 | } | |
167 | ||
b3b94faa DT |
168 | /** |
169 | * inode_go_xmote_bh - After promoting/demoting a glock | |
170 | * @gl: the glock | |
171 | * | |
172 | */ | |
173 | ||
174 | static void inode_go_xmote_bh(struct gfs2_glock *gl) | |
175 | { | |
176 | struct gfs2_holder *gh = gl->gl_req_gh; | |
177 | struct buffer_head *bh; | |
178 | int error; | |
179 | ||
180 | if (gl->gl_state != LM_ST_UNLOCKED && | |
181 | (!gh || !(gh->gh_flags & GL_SKIP))) { | |
7276b3b0 | 182 | error = gfs2_meta_read(gl, gl->gl_name.ln_number, 0, &bh); |
b3b94faa DT |
183 | if (!error) |
184 | brelse(bh); | |
185 | } | |
186 | } | |
187 | ||
b3b94faa DT |
188 | /** |
189 | * inode_go_inval - prepare a inode glock to be released | |
190 | * @gl: the glock | |
191 | * @flags: | |
192 | * | |
193 | */ | |
194 | ||
195 | static void inode_go_inval(struct gfs2_glock *gl, int flags) | |
196 | { | |
b004157a | 197 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa | 198 | int meta = (flags & DIO_METADATA); |
b3b94faa DT |
199 | |
200 | if (meta) { | |
201 | gfs2_meta_inval(gl); | |
b004157a SW |
202 | if (ip) |
203 | set_bit(GIF_INVALID, &ip->i_flags); | |
204 | } | |
205 | ||
3cc3f710 | 206 | if (ip && S_ISREG(ip->i_inode.i_mode)) |
b004157a | 207 | truncate_inode_pages(ip->i_inode.i_mapping, 0); |
b3b94faa DT |
208 | } |
209 | ||
210 | /** | |
211 | * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock | |
212 | * @gl: the glock | |
213 | * | |
214 | * Returns: 1 if it's ok | |
215 | */ | |
216 | ||
217 | static int inode_go_demote_ok(struct gfs2_glock *gl) | |
218 | { | |
219 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
220 | int demote = 0; | |
221 | ||
5c676f6d | 222 | if (!gl->gl_object && !gl->gl_aspace->i_mapping->nrpages) |
b3b94faa DT |
223 | demote = 1; |
224 | else if (!sdp->sd_args.ar_localcaching && | |
225 | time_after_eq(jiffies, gl->gl_stamp + | |
226 | gfs2_tune_get(sdp, gt_demote_secs) * HZ)) | |
227 | demote = 1; | |
228 | ||
229 | return demote; | |
230 | } | |
231 | ||
232 | /** | |
233 | * inode_go_lock - operation done after an inode lock is locked by a process | |
234 | * @gl: the glock | |
235 | * @flags: | |
236 | * | |
237 | * Returns: errno | |
238 | */ | |
239 | ||
240 | static int inode_go_lock(struct gfs2_holder *gh) | |
241 | { | |
242 | struct gfs2_glock *gl = gh->gh_gl; | |
5c676f6d | 243 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa DT |
244 | int error = 0; |
245 | ||
246 | if (!ip) | |
247 | return 0; | |
248 | ||
bfded27b | 249 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
b3b94faa DT |
250 | error = gfs2_inode_refresh(ip); |
251 | if (error) | |
252 | return error; | |
b3b94faa DT |
253 | } |
254 | ||
255 | if ((ip->i_di.di_flags & GFS2_DIF_TRUNC_IN_PROG) && | |
256 | (gl->gl_state == LM_ST_EXCLUSIVE) && | |
1c0f4872 | 257 | (gh->gh_state == LM_ST_EXCLUSIVE)) |
b3b94faa DT |
258 | error = gfs2_truncatei_resume(ip); |
259 | ||
260 | return error; | |
261 | } | |
262 | ||
b3b94faa DT |
263 | /** |
264 | * rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock | |
265 | * @gl: the glock | |
266 | * | |
267 | * Returns: 1 if it's ok | |
268 | */ | |
269 | ||
270 | static int rgrp_go_demote_ok(struct gfs2_glock *gl) | |
271 | { | |
272 | return !gl->gl_aspace->i_mapping->nrpages; | |
273 | } | |
274 | ||
275 | /** | |
276 | * rgrp_go_lock - operation done after an rgrp lock is locked by | |
277 | * a first holder on this node. | |
278 | * @gl: the glock | |
279 | * @flags: | |
280 | * | |
281 | * Returns: errno | |
282 | */ | |
283 | ||
284 | static int rgrp_go_lock(struct gfs2_holder *gh) | |
285 | { | |
5c676f6d | 286 | return gfs2_rgrp_bh_get(gh->gh_gl->gl_object); |
b3b94faa DT |
287 | } |
288 | ||
289 | /** | |
290 | * rgrp_go_unlock - operation done before an rgrp lock is unlocked by | |
291 | * a last holder on this node. | |
292 | * @gl: the glock | |
293 | * @flags: | |
294 | * | |
295 | */ | |
296 | ||
297 | static void rgrp_go_unlock(struct gfs2_holder *gh) | |
298 | { | |
5c676f6d | 299 | gfs2_rgrp_bh_put(gh->gh_gl->gl_object); |
b3b94faa DT |
300 | } |
301 | ||
302 | /** | |
3042a2cc | 303 | * trans_go_sync - promote/demote the transaction glock |
b3b94faa DT |
304 | * @gl: the glock |
305 | * @state: the requested state | |
306 | * @flags: | |
307 | * | |
308 | */ | |
309 | ||
3042a2cc | 310 | static void trans_go_sync(struct gfs2_glock *gl) |
b3b94faa DT |
311 | { |
312 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
313 | ||
314 | if (gl->gl_state != LM_ST_UNLOCKED && | |
315 | test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
316 | gfs2_meta_syncfs(sdp); | |
317 | gfs2_log_shutdown(sdp); | |
318 | } | |
b3b94faa DT |
319 | } |
320 | ||
321 | /** | |
322 | * trans_go_xmote_bh - After promoting/demoting the transaction glock | |
323 | * @gl: the glock | |
324 | * | |
325 | */ | |
326 | ||
327 | static void trans_go_xmote_bh(struct gfs2_glock *gl) | |
328 | { | |
329 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
feaa7bba | 330 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 331 | struct gfs2_glock *j_gl = ip->i_gl; |
55167622 | 332 | struct gfs2_log_header_host head; |
b3b94faa DT |
333 | int error; |
334 | ||
335 | if (gl->gl_state != LM_ST_UNLOCKED && | |
336 | test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
1a14d3a6 | 337 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
338 | |
339 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
340 | if (error) | |
341 | gfs2_consist(sdp); | |
342 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) | |
343 | gfs2_consist(sdp); | |
344 | ||
345 | /* Initialize some head of the log stuff */ | |
346 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { | |
347 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
348 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
b3b94faa DT |
353 | /** |
354 | * quota_go_demote_ok - Check to see if it's ok to unlock a quota glock | |
355 | * @gl: the glock | |
356 | * | |
357 | * Returns: 1 if it's ok | |
358 | */ | |
359 | ||
360 | static int quota_go_demote_ok(struct gfs2_glock *gl) | |
361 | { | |
362 | return !atomic_read(&gl->gl_lvb_count); | |
363 | } | |
364 | ||
8fb4b536 | 365 | const struct gfs2_glock_operations gfs2_meta_glops = { |
b5d32bea | 366 | .go_xmote_th = meta_go_sync, |
ea67eedb | 367 | .go_type = LM_TYPE_META, |
b3b94faa DT |
368 | }; |
369 | ||
8fb4b536 | 370 | const struct gfs2_glock_operations gfs2_inode_glops = { |
3042a2cc | 371 | .go_xmote_th = inode_go_sync, |
b3b94faa | 372 | .go_xmote_bh = inode_go_xmote_bh, |
b3b94faa DT |
373 | .go_inval = inode_go_inval, |
374 | .go_demote_ok = inode_go_demote_ok, | |
375 | .go_lock = inode_go_lock, | |
ea67eedb | 376 | .go_type = LM_TYPE_INODE, |
c4f68a13 | 377 | .go_min_hold_time = HZ / 10, |
b3b94faa DT |
378 | }; |
379 | ||
8fb4b536 | 380 | const struct gfs2_glock_operations gfs2_rgrp_glops = { |
cad5b939 | 381 | .go_xmote_th = meta_go_sync, |
b3b94faa DT |
382 | .go_inval = meta_go_inval, |
383 | .go_demote_ok = rgrp_go_demote_ok, | |
384 | .go_lock = rgrp_go_lock, | |
385 | .go_unlock = rgrp_go_unlock, | |
ea67eedb | 386 | .go_type = LM_TYPE_RGRP, |
c4f68a13 | 387 | .go_min_hold_time = HZ / 10, |
b3b94faa DT |
388 | }; |
389 | ||
8fb4b536 | 390 | const struct gfs2_glock_operations gfs2_trans_glops = { |
3042a2cc | 391 | .go_xmote_th = trans_go_sync, |
b3b94faa | 392 | .go_xmote_bh = trans_go_xmote_bh, |
ea67eedb | 393 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
394 | }; |
395 | ||
8fb4b536 | 396 | const struct gfs2_glock_operations gfs2_iopen_glops = { |
ea67eedb | 397 | .go_type = LM_TYPE_IOPEN, |
b3b94faa DT |
398 | }; |
399 | ||
8fb4b536 | 400 | const struct gfs2_glock_operations gfs2_flock_glops = { |
ea67eedb | 401 | .go_type = LM_TYPE_FLOCK, |
b3b94faa DT |
402 | }; |
403 | ||
8fb4b536 | 404 | const struct gfs2_glock_operations gfs2_nondisk_glops = { |
ea67eedb | 405 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
406 | }; |
407 | ||
8fb4b536 | 408 | const struct gfs2_glock_operations gfs2_quota_glops = { |
b3b94faa | 409 | .go_demote_ok = quota_go_demote_ok, |
ea67eedb | 410 | .go_type = LM_TYPE_QUOTA, |
b3b94faa DT |
411 | }; |
412 | ||
8fb4b536 | 413 | const struct gfs2_glock_operations gfs2_journal_glops = { |
ea67eedb | 414 | .go_type = LM_TYPE_JOURNAL, |
b3b94faa DT |
415 | }; |
416 |