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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 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
71b86f56 | 15 | #include <linux/crc32.h> |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
f45b7ddd | 17 | #include <linux/bio.h> |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d SW |
20 | #include "lm_interface.h" |
21 | #include "incore.h" | |
b3b94faa DT |
22 | #include "bmap.h" |
23 | #include "dir.h" | |
b3b94faa DT |
24 | #include "glock.h" |
25 | #include "glops.h" | |
26 | #include "inode.h" | |
27 | #include "log.h" | |
28 | #include "meta_io.h" | |
29 | #include "quota.h" | |
30 | #include "recovery.h" | |
31 | #include "rgrp.h" | |
32 | #include "super.h" | |
33 | #include "trans.h" | |
5c676f6d | 34 | #include "util.h" |
b3b94faa | 35 | |
75d3b817 SW |
36 | static const uint32_t gfs2_old_fs_formats[] = { |
37 | 0 | |
38 | }; | |
39 | ||
40 | static const uint32_t gfs2_old_multihost_formats[] = { | |
41 | 0 | |
42 | }; | |
43 | ||
b3b94faa DT |
44 | /** |
45 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
46 | * @gt: tune | |
47 | * | |
48 | */ | |
49 | ||
50 | void gfs2_tune_init(struct gfs2_tune *gt) | |
51 | { | |
52 | spin_lock_init(>->gt_spin); | |
53 | ||
54 | gt->gt_ilimit = 100; | |
55 | gt->gt_ilimit_tries = 3; | |
56 | gt->gt_ilimit_min = 1; | |
57 | gt->gt_demote_secs = 300; | |
58 | gt->gt_incore_log_blocks = 1024; | |
59 | gt->gt_log_flush_secs = 60; | |
60 | gt->gt_jindex_refresh_secs = 60; | |
61 | gt->gt_scand_secs = 15; | |
62 | gt->gt_recoverd_secs = 60; | |
63 | gt->gt_logd_secs = 1; | |
64 | gt->gt_quotad_secs = 5; | |
b3b94faa DT |
65 | gt->gt_quota_simul_sync = 64; |
66 | gt->gt_quota_warn_period = 10; | |
67 | gt->gt_quota_scale_num = 1; | |
68 | gt->gt_quota_scale_den = 1; | |
69 | gt->gt_quota_cache_secs = 300; | |
70 | gt->gt_quota_quantum = 60; | |
71 | gt->gt_atime_quantum = 3600; | |
72 | gt->gt_new_files_jdata = 0; | |
73 | gt->gt_new_files_directio = 0; | |
74 | gt->gt_max_atomic_write = 4 << 20; | |
75 | gt->gt_max_readahead = 1 << 18; | |
76 | gt->gt_lockdump_size = 131072; | |
77 | gt->gt_stall_secs = 600; | |
78 | gt->gt_complain_secs = 10; | |
79 | gt->gt_reclaim_limit = 5000; | |
80 | gt->gt_entries_per_readdir = 32; | |
81 | gt->gt_prefetch_secs = 10; | |
82 | gt->gt_greedy_default = HZ / 10; | |
83 | gt->gt_greedy_quantum = HZ / 40; | |
84 | gt->gt_greedy_max = HZ / 4; | |
85 | gt->gt_statfs_quantum = 30; | |
86 | gt->gt_statfs_slow = 0; | |
87 | } | |
88 | ||
89 | /** | |
90 | * gfs2_check_sb - Check superblock | |
91 | * @sdp: the filesystem | |
92 | * @sb: The superblock | |
93 | * @silent: Don't print a message if the check fails | |
94 | * | |
95 | * Checks the version code of the FS is one that we understand how to | |
96 | * read and that the sizes of the various on-disk structures have not | |
97 | * changed. | |
98 | */ | |
99 | ||
100 | int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb *sb, int silent) | |
101 | { | |
102 | unsigned int x; | |
103 | ||
104 | if (sb->sb_header.mh_magic != GFS2_MAGIC || | |
105 | sb->sb_header.mh_type != GFS2_METATYPE_SB) { | |
106 | if (!silent) | |
d92a8d48 | 107 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); |
b3b94faa DT |
108 | return -EINVAL; |
109 | } | |
110 | ||
111 | /* If format numbers match exactly, we're done. */ | |
112 | ||
113 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
114 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
115 | return 0; | |
116 | ||
117 | if (sb->sb_fs_format != GFS2_FORMAT_FS) { | |
118 | for (x = 0; gfs2_old_fs_formats[x]; x++) | |
119 | if (gfs2_old_fs_formats[x] == sb->sb_fs_format) | |
120 | break; | |
121 | ||
122 | if (!gfs2_old_fs_formats[x]) { | |
568f4c96 SW |
123 | printk(KERN_WARNING |
124 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
125 | "with ondisk format (%u, %u)\n", |
126 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
127 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
128 | printk(KERN_WARNING |
129 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
130 | return -EINVAL; |
131 | } | |
132 | } | |
133 | ||
134 | if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) { | |
135 | for (x = 0; gfs2_old_multihost_formats[x]; x++) | |
568f4c96 SW |
136 | if (gfs2_old_multihost_formats[x] == |
137 | sb->sb_multihost_format) | |
b3b94faa DT |
138 | break; |
139 | ||
140 | if (!gfs2_old_multihost_formats[x]) { | |
568f4c96 SW |
141 | printk(KERN_WARNING |
142 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
143 | "with ondisk format (%u, %u)\n", |
144 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
145 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
146 | printk(KERN_WARNING |
147 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
148 | return -EINVAL; |
149 | } | |
150 | } | |
151 | ||
152 | if (!sdp->sd_args.ar_upgrade) { | |
568f4c96 SW |
153 | printk(KERN_WARNING |
154 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
155 | "with ondisk format (%u, %u)\n", |
156 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
157 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
158 | printk(KERN_INFO |
159 | "GFS2: Use the \"upgrade\" mount option to upgrade " | |
b3b94faa | 160 | "the FS\n"); |
d92a8d48 | 161 | printk(KERN_INFO "GFS2: See the manual for more details\n"); |
b3b94faa DT |
162 | return -EINVAL; |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
f45b7ddd SW |
168 | |
169 | static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error) | |
170 | { | |
171 | struct page *page = bio->bi_private; | |
172 | if (bio->bi_size) | |
173 | return 1; | |
174 | ||
175 | if (!error) | |
176 | SetPageUptodate(page); | |
2b98a54f SW |
177 | else |
178 | printk(KERN_WARNING "gfs2: error %d reading superblock\n", error); | |
f45b7ddd SW |
179 | unlock_page(page); |
180 | return 0; | |
181 | } | |
182 | ||
183 | static struct page *gfs2_read_super(struct super_block *sb, sector_t sector) | |
184 | { | |
185 | struct page *page; | |
186 | struct bio *bio; | |
187 | ||
188 | page = alloc_page(GFP_KERNEL); | |
189 | if (unlikely(!page)) | |
190 | return NULL; | |
191 | ||
192 | ClearPageUptodate(page); | |
193 | ClearPageDirty(page); | |
194 | lock_page(page); | |
195 | ||
196 | bio = bio_alloc(GFP_KERNEL, 1); | |
197 | if (unlikely(!bio)) { | |
198 | __free_page(page); | |
199 | return NULL; | |
200 | } | |
201 | ||
202 | bio->bi_sector = sector; | |
203 | bio->bi_bdev = sb->s_bdev; | |
204 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
205 | ||
206 | bio->bi_end_io = end_bio_io_page; | |
207 | bio->bi_private = page; | |
2b98a54f | 208 | submit_bio(READ_SYNC, bio); |
f45b7ddd SW |
209 | wait_on_page_locked(page); |
210 | bio_put(bio); | |
211 | if (!PageUptodate(page)) { | |
212 | __free_page(page); | |
213 | return NULL; | |
214 | } | |
215 | return page; | |
216 | } | |
217 | ||
b3b94faa DT |
218 | /** |
219 | * gfs2_read_sb - Read super block | |
220 | * @sdp: The GFS2 superblock | |
221 | * @gl: the glock for the superblock (assumed to be held) | |
222 | * @silent: Don't print message if mount fails | |
223 | * | |
224 | */ | |
225 | ||
226 | int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent) | |
227 | { | |
b3b94faa DT |
228 | uint32_t hash_blocks, ind_blocks, leaf_blocks; |
229 | uint32_t tmp_blocks; | |
230 | unsigned int x; | |
231 | int error; | |
f45b7ddd SW |
232 | struct page *page; |
233 | char *sb; | |
b3b94faa | 234 | |
f45b7ddd SW |
235 | page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift); |
236 | if (!page) { | |
b3b94faa DT |
237 | if (!silent) |
238 | fs_err(sdp, "can't read superblock\n"); | |
f45b7ddd | 239 | return -EIO; |
b3b94faa | 240 | } |
f45b7ddd SW |
241 | sb = kmap(page); |
242 | gfs2_sb_in(&sdp->sd_sb, sb); | |
243 | kunmap(page); | |
244 | __free_page(page); | |
b3b94faa DT |
245 | |
246 | error = gfs2_check_sb(sdp, &sdp->sd_sb, silent); | |
247 | if (error) | |
248 | return error; | |
249 | ||
250 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
251 | GFS2_BASIC_BLOCK_SHIFT; | |
252 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
253 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
254 | sizeof(struct gfs2_dinode)) / sizeof(uint64_t); | |
255 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
256 | sizeof(struct gfs2_meta_header)) / sizeof(uint64_t); | |
257 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
258 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
259 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
260 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(uint64_t); | |
b3b94faa DT |
261 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - |
262 | sizeof(struct gfs2_meta_header)) / | |
f45b7ddd | 263 | sizeof(struct gfs2_quota_change); |
b3b94faa DT |
264 | |
265 | /* Compute maximum reservation required to add a entry to a directory */ | |
266 | ||
5c676f6d | 267 | hash_blocks = DIV_ROUND_UP(sizeof(uint64_t) * (1 << GFS2_DIR_MAX_DEPTH), |
b3b94faa DT |
268 | sdp->sd_jbsize); |
269 | ||
270 | ind_blocks = 0; | |
271 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
5c676f6d | 272 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); |
b3b94faa DT |
273 | ind_blocks += tmp_blocks; |
274 | } | |
275 | ||
276 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
277 | ||
278 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
279 | ||
280 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
281 | sizeof(struct gfs2_dinode); | |
282 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
283 | for (x = 2;; x++) { | |
284 | uint64_t space, d; | |
285 | uint32_t m; | |
286 | ||
287 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
288 | d = space; | |
289 | m = do_div(d, sdp->sd_inptrs); | |
290 | ||
291 | if (d != sdp->sd_heightsize[x - 1] || m) | |
292 | break; | |
293 | sdp->sd_heightsize[x] = space; | |
294 | } | |
295 | sdp->sd_max_height = x; | |
296 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
297 | ||
298 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
299 | sizeof(struct gfs2_dinode); | |
300 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
301 | for (x = 2;; x++) { | |
302 | uint64_t space, d; | |
303 | uint32_t m; | |
304 | ||
305 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
306 | d = space; | |
307 | m = do_div(d, sdp->sd_inptrs); | |
308 | ||
309 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
310 | break; | |
311 | sdp->sd_jheightsize[x] = space; | |
312 | } | |
313 | sdp->sd_max_jheight = x; | |
314 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
b3b94faa DT |
319 | /** |
320 | * gfs2_jindex_hold - Grab a lock on the jindex | |
321 | * @sdp: The GFS2 superblock | |
322 | * @ji_gh: the holder for the jindex glock | |
323 | * | |
324 | * This is very similar to the gfs2_rindex_hold() function, except that | |
325 | * in general we hold the jindex lock for longer periods of time and | |
326 | * we grab it far less frequently (in general) then the rgrp lock. | |
327 | * | |
328 | * Returns: errno | |
329 | */ | |
330 | ||
331 | int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
332 | { | |
feaa7bba | 333 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); |
b3b94faa DT |
334 | struct qstr name; |
335 | char buf[20]; | |
336 | struct gfs2_jdesc *jd; | |
337 | int error; | |
338 | ||
339 | name.name = buf; | |
340 | ||
f55ab26a | 341 | mutex_lock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
342 | |
343 | for (;;) { | |
344 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, | |
345 | GL_LOCAL_EXCL, ji_gh); | |
346 | if (error) | |
347 | break; | |
348 | ||
349 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
c752666c | 350 | name.hash = gfs2_disk_hash(name.name, name.len); |
b3b94faa | 351 | |
feaa7bba | 352 | error = gfs2_dir_search(sdp->sd_jindex, &name, NULL, NULL); |
b3b94faa DT |
353 | if (error == -ENOENT) { |
354 | error = 0; | |
355 | break; | |
356 | } | |
357 | ||
358 | gfs2_glock_dq_uninit(ji_gh); | |
359 | ||
360 | if (error) | |
361 | break; | |
362 | ||
363 | error = -ENOMEM; | |
364 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
365 | if (!jd) | |
366 | break; | |
367 | ||
c752666c SW |
368 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL); |
369 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
370 | if (!jd->jd_inode) | |
371 | error = -ENOENT; | |
372 | else | |
373 | error = PTR_ERR(jd->jd_inode); | |
b3b94faa DT |
374 | kfree(jd); |
375 | break; | |
376 | } | |
377 | ||
378 | spin_lock(&sdp->sd_jindex_spin); | |
379 | jd->jd_jid = sdp->sd_journals++; | |
380 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
381 | spin_unlock(&sdp->sd_jindex_spin); | |
382 | } | |
383 | ||
f55ab26a | 384 | mutex_unlock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
385 | |
386 | return error; | |
387 | } | |
388 | ||
389 | /** | |
390 | * gfs2_jindex_free - Clear all the journal index information | |
391 | * @sdp: The GFS2 superblock | |
392 | * | |
393 | */ | |
394 | ||
395 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
396 | { | |
397 | struct list_head list; | |
398 | struct gfs2_jdesc *jd; | |
399 | ||
400 | spin_lock(&sdp->sd_jindex_spin); | |
401 | list_add(&list, &sdp->sd_jindex_list); | |
402 | list_del_init(&sdp->sd_jindex_list); | |
403 | sdp->sd_journals = 0; | |
404 | spin_unlock(&sdp->sd_jindex_spin); | |
405 | ||
406 | while (!list_empty(&list)) { | |
407 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
408 | list_del(&jd->jd_list); | |
7359a19c | 409 | iput(jd->jd_inode); |
b3b94faa DT |
410 | kfree(jd); |
411 | } | |
412 | } | |
413 | ||
414 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) | |
415 | { | |
416 | struct gfs2_jdesc *jd; | |
417 | int found = 0; | |
418 | ||
419 | list_for_each_entry(jd, head, jd_list) { | |
420 | if (jd->jd_jid == jid) { | |
421 | found = 1; | |
422 | break; | |
423 | } | |
424 | } | |
425 | ||
426 | if (!found) | |
427 | jd = NULL; | |
428 | ||
429 | return jd; | |
430 | } | |
431 | ||
432 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
433 | { | |
434 | struct gfs2_jdesc *jd; | |
435 | ||
436 | spin_lock(&sdp->sd_jindex_spin); | |
437 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
438 | spin_unlock(&sdp->sd_jindex_spin); | |
439 | ||
440 | return jd; | |
441 | } | |
442 | ||
443 | void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid) | |
444 | { | |
445 | struct gfs2_jdesc *jd; | |
446 | ||
447 | spin_lock(&sdp->sd_jindex_spin); | |
448 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
449 | if (jd) | |
450 | jd->jd_dirty = 1; | |
451 | spin_unlock(&sdp->sd_jindex_spin); | |
452 | } | |
453 | ||
454 | struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp) | |
455 | { | |
456 | struct gfs2_jdesc *jd; | |
457 | int found = 0; | |
458 | ||
459 | spin_lock(&sdp->sd_jindex_spin); | |
460 | ||
461 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
462 | if (jd->jd_dirty) { | |
463 | jd->jd_dirty = 0; | |
464 | found = 1; | |
465 | break; | |
466 | } | |
467 | } | |
468 | spin_unlock(&sdp->sd_jindex_spin); | |
469 | ||
470 | if (!found) | |
471 | jd = NULL; | |
472 | ||
473 | return jd; | |
474 | } | |
475 | ||
476 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) | |
477 | { | |
feaa7bba SW |
478 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
479 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
480 | int ar; |
481 | int error; | |
482 | ||
feaa7bba | 483 | if (ip->i_di.di_size < (8 << 20) || ip->i_di.di_size > (1 << 30) || |
b3b94faa DT |
484 | (ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1))) { |
485 | gfs2_consist_inode(ip); | |
486 | return -EIO; | |
487 | } | |
488 | jd->jd_blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; | |
489 | ||
feaa7bba | 490 | error = gfs2_write_alloc_required(ip, 0, ip->i_di.di_size, &ar); |
b3b94faa DT |
491 | if (!error && ar) { |
492 | gfs2_consist_inode(ip); | |
493 | error = -EIO; | |
494 | } | |
495 | ||
496 | return error; | |
497 | } | |
498 | ||
b3b94faa DT |
499 | /** |
500 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
501 | * @sdp: the filesystem | |
502 | * | |
503 | * Returns: errno | |
504 | */ | |
505 | ||
506 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
507 | { | |
feaa7bba | 508 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 509 | struct gfs2_glock *j_gl = ip->i_gl; |
b3b94faa DT |
510 | struct gfs2_holder t_gh; |
511 | struct gfs2_log_header head; | |
512 | int error; | |
513 | ||
514 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, | |
579b78a4 | 515 | GL_LOCAL_EXCL, &t_gh); |
b3b94faa DT |
516 | if (error) |
517 | return error; | |
518 | ||
5c676f6d | 519 | gfs2_meta_cache_flush(ip); |
b3b94faa DT |
520 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA); |
521 | ||
522 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
523 | if (error) | |
524 | goto fail; | |
525 | ||
526 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
527 | gfs2_consist(sdp); | |
528 | error = -EIO; | |
529 | goto fail; | |
530 | } | |
531 | ||
532 | /* Initialize some head of the log stuff */ | |
533 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
534 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
535 | ||
b3b94faa DT |
536 | error = gfs2_quota_init(sdp); |
537 | if (error) | |
538 | goto fail_unlinked; | |
539 | ||
540 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
541 | ||
542 | gfs2_glock_dq_uninit(&t_gh); | |
543 | ||
544 | return 0; | |
545 | ||
546 | fail_unlinked: | |
b3b94faa DT |
547 | |
548 | fail: | |
549 | t_gh.gh_flags |= GL_NOCACHE; | |
550 | gfs2_glock_dq_uninit(&t_gh); | |
551 | ||
552 | return error; | |
553 | } | |
554 | ||
555 | /** | |
556 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
557 | * @sdp: the filesystem | |
558 | * | |
559 | * Returns: errno | |
560 | */ | |
561 | ||
562 | int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
563 | { | |
564 | struct gfs2_holder t_gh; | |
565 | int error; | |
566 | ||
b3b94faa DT |
567 | gfs2_quota_sync(sdp); |
568 | gfs2_statfs_sync(sdp); | |
569 | ||
570 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, | |
579b78a4 | 571 | GL_LOCAL_EXCL | GL_NOCACHE, |
b3b94faa DT |
572 | &t_gh); |
573 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
574 | return error; | |
575 | ||
576 | gfs2_meta_syncfs(sdp); | |
577 | gfs2_log_shutdown(sdp); | |
578 | ||
579 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
580 | ||
581 | if (t_gh.gh_gl) | |
582 | gfs2_glock_dq_uninit(&t_gh); | |
583 | ||
b3b94faa DT |
584 | gfs2_quota_cleanup(sdp); |
585 | ||
586 | return error; | |
587 | } | |
588 | ||
589 | int gfs2_statfs_init(struct gfs2_sbd *sdp) | |
590 | { | |
feaa7bba | 591 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
b3b94faa | 592 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 593 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
b3b94faa DT |
594 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; |
595 | struct buffer_head *m_bh, *l_bh; | |
596 | struct gfs2_holder gh; | |
597 | int error; | |
598 | ||
599 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
600 | &gh); | |
601 | if (error) | |
602 | return error; | |
603 | ||
604 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
605 | if (error) | |
606 | goto out; | |
607 | ||
608 | if (sdp->sd_args.ar_spectator) { | |
609 | spin_lock(&sdp->sd_statfs_spin); | |
610 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
611 | sizeof(struct gfs2_dinode)); | |
612 | spin_unlock(&sdp->sd_statfs_spin); | |
613 | } else { | |
614 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
615 | if (error) | |
616 | goto out_m_bh; | |
617 | ||
618 | spin_lock(&sdp->sd_statfs_spin); | |
619 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
620 | sizeof(struct gfs2_dinode)); | |
621 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
622 | sizeof(struct gfs2_dinode)); | |
623 | spin_unlock(&sdp->sd_statfs_spin); | |
624 | ||
625 | brelse(l_bh); | |
626 | } | |
627 | ||
628 | out_m_bh: | |
629 | brelse(m_bh); | |
630 | ||
631 | out: | |
632 | gfs2_glock_dq_uninit(&gh); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | void gfs2_statfs_change(struct gfs2_sbd *sdp, int64_t total, int64_t free, | |
638 | int64_t dinodes) | |
639 | { | |
feaa7bba | 640 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
b3b94faa DT |
641 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; |
642 | struct buffer_head *l_bh; | |
643 | int error; | |
644 | ||
645 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
646 | if (error) | |
647 | return; | |
648 | ||
f55ab26a | 649 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 650 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 651 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
652 | |
653 | spin_lock(&sdp->sd_statfs_spin); | |
654 | l_sc->sc_total += total; | |
655 | l_sc->sc_free += free; | |
656 | l_sc->sc_dinodes += dinodes; | |
657 | gfs2_statfs_change_out(l_sc, l_bh->b_data + | |
658 | sizeof(struct gfs2_dinode)); | |
659 | spin_unlock(&sdp->sd_statfs_spin); | |
660 | ||
661 | brelse(l_bh); | |
662 | } | |
663 | ||
664 | int gfs2_statfs_sync(struct gfs2_sbd *sdp) | |
665 | { | |
feaa7bba SW |
666 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
667 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
b3b94faa DT |
668 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; |
669 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; | |
670 | struct gfs2_holder gh; | |
671 | struct buffer_head *m_bh, *l_bh; | |
672 | int error; | |
673 | ||
674 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
675 | &gh); | |
676 | if (error) | |
677 | return error; | |
678 | ||
679 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
680 | if (error) | |
681 | goto out; | |
682 | ||
683 | spin_lock(&sdp->sd_statfs_spin); | |
684 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
685 | sizeof(struct gfs2_dinode)); | |
686 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { | |
687 | spin_unlock(&sdp->sd_statfs_spin); | |
688 | goto out_bh; | |
689 | } | |
690 | spin_unlock(&sdp->sd_statfs_spin); | |
691 | ||
692 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
693 | if (error) | |
694 | goto out_bh; | |
695 | ||
696 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
697 | if (error) | |
698 | goto out_bh2; | |
699 | ||
f55ab26a | 700 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 701 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 702 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
703 | |
704 | spin_lock(&sdp->sd_statfs_spin); | |
705 | m_sc->sc_total += l_sc->sc_total; | |
706 | m_sc->sc_free += l_sc->sc_free; | |
707 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
708 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
709 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
710 | 0, sizeof(struct gfs2_statfs_change)); | |
711 | spin_unlock(&sdp->sd_statfs_spin); | |
712 | ||
d4e9c4c3 | 713 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b3b94faa DT |
714 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
715 | ||
716 | gfs2_trans_end(sdp); | |
717 | ||
718 | out_bh2: | |
719 | brelse(l_bh); | |
720 | ||
721 | out_bh: | |
722 | brelse(m_bh); | |
723 | ||
724 | out: | |
725 | gfs2_glock_dq_uninit(&gh); | |
726 | ||
727 | return error; | |
728 | } | |
729 | ||
730 | /** | |
731 | * gfs2_statfs_i - Do a statfs | |
732 | * @sdp: the filesystem | |
733 | * @sg: the sg structure | |
734 | * | |
735 | * Returns: errno | |
736 | */ | |
737 | ||
738 | int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc) | |
739 | { | |
740 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; | |
741 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; | |
742 | ||
743 | spin_lock(&sdp->sd_statfs_spin); | |
744 | ||
745 | *sc = *m_sc; | |
746 | sc->sc_total += l_sc->sc_total; | |
747 | sc->sc_free += l_sc->sc_free; | |
748 | sc->sc_dinodes += l_sc->sc_dinodes; | |
749 | ||
750 | spin_unlock(&sdp->sd_statfs_spin); | |
751 | ||
752 | if (sc->sc_free < 0) | |
753 | sc->sc_free = 0; | |
754 | if (sc->sc_free > sc->sc_total) | |
755 | sc->sc_free = sc->sc_total; | |
756 | if (sc->sc_dinodes < 0) | |
757 | sc->sc_dinodes = 0; | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | /** | |
763 | * statfs_fill - fill in the sg for a given RG | |
764 | * @rgd: the RG | |
765 | * @sc: the sc structure | |
766 | * | |
767 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
768 | */ | |
769 | ||
770 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
771 | struct gfs2_statfs_change *sc) | |
772 | { | |
773 | gfs2_rgrp_verify(rgd); | |
774 | sc->sc_total += rgd->rd_ri.ri_data; | |
775 | sc->sc_free += rgd->rd_rg.rg_free; | |
776 | sc->sc_dinodes += rgd->rd_rg.rg_dinodes; | |
777 | return 0; | |
778 | } | |
779 | ||
780 | /** | |
781 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
782 | * @sdp: the filesystem | |
783 | * @sc: the sc info that will be returned | |
784 | * | |
785 | * Any error (other than a signal) will cause this routine to fall back | |
786 | * to the synchronous version. | |
787 | * | |
788 | * FIXME: This really shouldn't busy wait like this. | |
789 | * | |
790 | * Returns: errno | |
791 | */ | |
792 | ||
793 | int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc) | |
794 | { | |
795 | struct gfs2_holder ri_gh; | |
796 | struct gfs2_rgrpd *rgd_next; | |
797 | struct gfs2_holder *gha, *gh; | |
798 | unsigned int slots = 64; | |
799 | unsigned int x; | |
800 | int done; | |
801 | int error = 0, err; | |
802 | ||
803 | memset(sc, 0, sizeof(struct gfs2_statfs_change)); | |
804 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
805 | if (!gha) | |
806 | return -ENOMEM; | |
807 | ||
808 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
809 | if (error) | |
810 | goto out; | |
811 | ||
812 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
813 | ||
814 | for (;;) { | |
815 | done = 1; | |
816 | ||
817 | for (x = 0; x < slots; x++) { | |
818 | gh = gha + x; | |
819 | ||
820 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
821 | err = gfs2_glock_wait(gh); | |
822 | if (err) { | |
823 | gfs2_holder_uninit(gh); | |
824 | error = err; | |
825 | } else { | |
826 | if (!error) | |
5c676f6d SW |
827 | error = statfs_slow_fill( |
828 | gh->gh_gl->gl_object, sc); | |
b3b94faa DT |
829 | gfs2_glock_dq_uninit(gh); |
830 | } | |
831 | } | |
832 | ||
833 | if (gh->gh_gl) | |
834 | done = 0; | |
835 | else if (rgd_next && !error) { | |
836 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
837 | LM_ST_SHARED, | |
838 | GL_ASYNC, | |
839 | gh); | |
840 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
841 | done = 0; | |
842 | } | |
843 | ||
844 | if (signal_pending(current)) | |
845 | error = -ERESTARTSYS; | |
846 | } | |
847 | ||
848 | if (done) | |
849 | break; | |
850 | ||
851 | yield(); | |
852 | } | |
853 | ||
854 | gfs2_glock_dq_uninit(&ri_gh); | |
855 | ||
856 | out: | |
857 | kfree(gha); | |
858 | ||
859 | return error; | |
860 | } | |
861 | ||
862 | struct lfcc { | |
863 | struct list_head list; | |
864 | struct gfs2_holder gh; | |
865 | }; | |
866 | ||
867 | /** | |
868 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
869 | * journals are clean | |
870 | * @sdp: the file system | |
871 | * @state: the state to put the transaction lock into | |
872 | * @t_gh: the hold on the transaction lock | |
873 | * | |
874 | * Returns: errno | |
875 | */ | |
876 | ||
08bc2dbc AB |
877 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
878 | struct gfs2_holder *t_gh) | |
b3b94faa | 879 | { |
5c676f6d | 880 | struct gfs2_inode *ip; |
b3b94faa DT |
881 | struct gfs2_holder ji_gh; |
882 | struct gfs2_jdesc *jd; | |
883 | struct lfcc *lfcc; | |
884 | LIST_HEAD(list); | |
885 | struct gfs2_log_header lh; | |
886 | int error; | |
887 | ||
888 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
889 | if (error) | |
890 | return error; | |
891 | ||
892 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
893 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
894 | if (!lfcc) { | |
895 | error = -ENOMEM; | |
896 | goto out; | |
897 | } | |
feaa7bba SW |
898 | ip = GFS2_I(jd->jd_inode); |
899 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
900 | if (error) { |
901 | kfree(lfcc); | |
902 | goto out; | |
903 | } | |
904 | list_add(&lfcc->list, &list); | |
905 | } | |
906 | ||
907 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, | |
579b78a4 | 908 | LM_FLAG_PRIORITY | GL_NOCACHE, |
b3b94faa DT |
909 | t_gh); |
910 | ||
911 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
912 | error = gfs2_jdesc_check(jd); | |
913 | if (error) | |
914 | break; | |
915 | error = gfs2_find_jhead(jd, &lh); | |
916 | if (error) | |
917 | break; | |
918 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
919 | error = -EBUSY; | |
920 | break; | |
921 | } | |
922 | } | |
923 | ||
924 | if (error) | |
925 | gfs2_glock_dq_uninit(t_gh); | |
926 | ||
927 | out: | |
928 | while (!list_empty(&list)) { | |
929 | lfcc = list_entry(list.next, struct lfcc, list); | |
930 | list_del(&lfcc->list); | |
931 | gfs2_glock_dq_uninit(&lfcc->gh); | |
932 | kfree(lfcc); | |
933 | } | |
934 | gfs2_glock_dq_uninit(&ji_gh); | |
935 | ||
936 | return error; | |
937 | } | |
938 | ||
939 | /** | |
940 | * gfs2_freeze_fs - freezes the file system | |
941 | * @sdp: the file system | |
942 | * | |
943 | * This function flushes data and meta data for all machines by | |
944 | * aquiring the transaction log exclusively. All journals are | |
945 | * ensured to be in a clean state as well. | |
946 | * | |
947 | * Returns: errno | |
948 | */ | |
949 | ||
950 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
951 | { | |
952 | int error = 0; | |
953 | ||
f55ab26a | 954 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
955 | |
956 | if (!sdp->sd_freeze_count++) { | |
957 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
958 | if (error) | |
959 | sdp->sd_freeze_count--; | |
960 | } | |
961 | ||
f55ab26a | 962 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
963 | |
964 | return error; | |
965 | } | |
966 | ||
967 | /** | |
968 | * gfs2_unfreeze_fs - unfreezes the file system | |
969 | * @sdp: the file system | |
970 | * | |
971 | * This function allows the file system to proceed by unlocking | |
972 | * the exclusively held transaction lock. Other GFS2 nodes are | |
973 | * now free to acquire the lock shared and go on with their lives. | |
974 | * | |
975 | */ | |
976 | ||
977 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
978 | { | |
f55ab26a | 979 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
980 | |
981 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
982 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
983 | ||
f55ab26a | 984 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
985 | } |
986 |