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