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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 | |
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> |
7d308590 | 18 | #include <linux/lm_interface.h> |
b3b94faa DT |
19 | |
20 | #include "gfs2.h" | |
5c676f6d | 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 | |
cd915493 | 36 | static const u32 gfs2_old_fs_formats[] = { |
75d3b817 SW |
37 | 0 |
38 | }; | |
39 | ||
cd915493 | 40 | static const u32 gfs2_old_multihost_formats[] = { |
75d3b817 SW |
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; | |
b3b94faa DT |
74 | gt->gt_max_readahead = 1 << 18; |
75 | gt->gt_lockdump_size = 131072; | |
76 | gt->gt_stall_secs = 600; | |
77 | gt->gt_complain_secs = 10; | |
78 | gt->gt_reclaim_limit = 5000; | |
b3b94faa DT |
79 | gt->gt_statfs_quantum = 30; |
80 | gt->gt_statfs_slow = 0; | |
81 | } | |
82 | ||
83 | /** | |
84 | * gfs2_check_sb - Check superblock | |
85 | * @sdp: the filesystem | |
86 | * @sb: The superblock | |
87 | * @silent: Don't print a message if the check fails | |
88 | * | |
89 | * Checks the version code of the FS is one that we understand how to | |
90 | * read and that the sizes of the various on-disk structures have not | |
91 | * changed. | |
92 | */ | |
93 | ||
f50dfaf7 | 94 | int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent) |
b3b94faa DT |
95 | { |
96 | unsigned int x; | |
97 | ||
98 | if (sb->sb_header.mh_magic != GFS2_MAGIC || | |
99 | sb->sb_header.mh_type != GFS2_METATYPE_SB) { | |
100 | if (!silent) | |
d92a8d48 | 101 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); |
b3b94faa DT |
102 | return -EINVAL; |
103 | } | |
104 | ||
105 | /* If format numbers match exactly, we're done. */ | |
106 | ||
107 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
108 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
109 | return 0; | |
110 | ||
111 | if (sb->sb_fs_format != GFS2_FORMAT_FS) { | |
112 | for (x = 0; gfs2_old_fs_formats[x]; x++) | |
113 | if (gfs2_old_fs_formats[x] == sb->sb_fs_format) | |
114 | break; | |
115 | ||
116 | if (!gfs2_old_fs_formats[x]) { | |
568f4c96 SW |
117 | printk(KERN_WARNING |
118 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
119 | "with ondisk format (%u, %u)\n", |
120 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
121 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
122 | printk(KERN_WARNING |
123 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
124 | return -EINVAL; |
125 | } | |
126 | } | |
127 | ||
128 | if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) { | |
129 | for (x = 0; gfs2_old_multihost_formats[x]; x++) | |
568f4c96 SW |
130 | if (gfs2_old_multihost_formats[x] == |
131 | sb->sb_multihost_format) | |
b3b94faa DT |
132 | break; |
133 | ||
134 | if (!gfs2_old_multihost_formats[x]) { | |
568f4c96 SW |
135 | printk(KERN_WARNING |
136 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
137 | "with ondisk format (%u, %u)\n", |
138 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
139 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
140 | printk(KERN_WARNING |
141 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
142 | return -EINVAL; |
143 | } | |
144 | } | |
145 | ||
146 | if (!sdp->sd_args.ar_upgrade) { | |
568f4c96 SW |
147 | printk(KERN_WARNING |
148 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
149 | "with ondisk format (%u, %u)\n", |
150 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
151 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
152 | printk(KERN_INFO |
153 | "GFS2: Use the \"upgrade\" mount option to upgrade " | |
b3b94faa | 154 | "the FS\n"); |
d92a8d48 | 155 | printk(KERN_INFO "GFS2: See the manual for more details\n"); |
b3b94faa DT |
156 | return -EINVAL; |
157 | } | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
f45b7ddd SW |
162 | |
163 | static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error) | |
164 | { | |
165 | struct page *page = bio->bi_private; | |
166 | if (bio->bi_size) | |
167 | return 1; | |
168 | ||
169 | if (!error) | |
170 | SetPageUptodate(page); | |
2b98a54f SW |
171 | else |
172 | printk(KERN_WARNING "gfs2: error %d reading superblock\n", error); | |
f45b7ddd SW |
173 | unlock_page(page); |
174 | return 0; | |
175 | } | |
176 | ||
aac1a3c7 SW |
177 | /** |
178 | * gfs2_read_super - Read the gfs2 super block from disk | |
179 | * @sb: The VFS super block | |
180 | * @sector: The location of the super block | |
181 | * | |
182 | * This uses the bio functions to read the super block from disk | |
183 | * because we want to be 100% sure that we never read cached data. | |
184 | * A super block is read twice only during each GFS2 mount and is | |
185 | * never written to by the filesystem. The first time its read no | |
186 | * locks are held, and the only details which are looked at are those | |
187 | * relating to the locking protocol. Once locking is up and working, | |
188 | * the sb is read again under the lock to establish the location of | |
189 | * the master directory (contains pointers to journals etc) and the | |
190 | * root directory. | |
191 | * | |
192 | * Returns: A page containing the sb or NULL | |
193 | */ | |
194 | ||
3cf1e7be | 195 | struct page *gfs2_read_super(struct super_block *sb, sector_t sector) |
f45b7ddd SW |
196 | { |
197 | struct page *page; | |
198 | struct bio *bio; | |
199 | ||
200 | page = alloc_page(GFP_KERNEL); | |
201 | if (unlikely(!page)) | |
202 | return NULL; | |
203 | ||
204 | ClearPageUptodate(page); | |
205 | ClearPageDirty(page); | |
206 | lock_page(page); | |
207 | ||
208 | bio = bio_alloc(GFP_KERNEL, 1); | |
209 | if (unlikely(!bio)) { | |
210 | __free_page(page); | |
211 | return NULL; | |
212 | } | |
213 | ||
0da3585e | 214 | bio->bi_sector = sector * (sb->s_blocksize >> 9); |
f45b7ddd SW |
215 | bio->bi_bdev = sb->s_bdev; |
216 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
217 | ||
218 | bio->bi_end_io = end_bio_io_page; | |
219 | bio->bi_private = page; | |
3cf1e7be | 220 | submit_bio(READ_SYNC | (1 << BIO_RW_META), bio); |
f45b7ddd SW |
221 | wait_on_page_locked(page); |
222 | bio_put(bio); | |
223 | if (!PageUptodate(page)) { | |
224 | __free_page(page); | |
225 | return NULL; | |
226 | } | |
227 | return page; | |
228 | } | |
229 | ||
b3b94faa DT |
230 | /** |
231 | * gfs2_read_sb - Read super block | |
232 | * @sdp: The GFS2 superblock | |
233 | * @gl: the glock for the superblock (assumed to be held) | |
234 | * @silent: Don't print message if mount fails | |
235 | * | |
236 | */ | |
237 | ||
238 | int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent) | |
239 | { | |
cd915493 SW |
240 | u32 hash_blocks, ind_blocks, leaf_blocks; |
241 | u32 tmp_blocks; | |
b3b94faa DT |
242 | unsigned int x; |
243 | int error; | |
f45b7ddd SW |
244 | struct page *page; |
245 | char *sb; | |
b3b94faa | 246 | |
f45b7ddd SW |
247 | page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift); |
248 | if (!page) { | |
b3b94faa DT |
249 | if (!silent) |
250 | fs_err(sdp, "can't read superblock\n"); | |
f45b7ddd | 251 | return -EIO; |
b3b94faa | 252 | } |
f45b7ddd SW |
253 | sb = kmap(page); |
254 | gfs2_sb_in(&sdp->sd_sb, sb); | |
255 | kunmap(page); | |
256 | __free_page(page); | |
b3b94faa DT |
257 | |
258 | error = gfs2_check_sb(sdp, &sdp->sd_sb, silent); | |
259 | if (error) | |
260 | return error; | |
261 | ||
262 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
263 | GFS2_BASIC_BLOCK_SHIFT; | |
264 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
265 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
cd915493 | 266 | sizeof(struct gfs2_dinode)) / sizeof(u64); |
b3b94faa | 267 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - |
cd915493 | 268 | sizeof(struct gfs2_meta_header)) / sizeof(u64); |
b3b94faa DT |
269 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); |
270 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
271 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
cd915493 | 272 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); |
b3b94faa DT |
273 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - |
274 | sizeof(struct gfs2_meta_header)) / | |
f45b7ddd | 275 | sizeof(struct gfs2_quota_change); |
b3b94faa DT |
276 | |
277 | /* Compute maximum reservation required to add a entry to a directory */ | |
278 | ||
cd915493 | 279 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), |
b3b94faa DT |
280 | sdp->sd_jbsize); |
281 | ||
282 | ind_blocks = 0; | |
283 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
5c676f6d | 284 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); |
b3b94faa DT |
285 | ind_blocks += tmp_blocks; |
286 | } | |
287 | ||
288 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
289 | ||
290 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
291 | ||
292 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
293 | sizeof(struct gfs2_dinode); | |
294 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
295 | for (x = 2;; x++) { | |
cd915493 SW |
296 | u64 space, d; |
297 | u32 m; | |
b3b94faa DT |
298 | |
299 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
300 | d = space; | |
301 | m = do_div(d, sdp->sd_inptrs); | |
302 | ||
303 | if (d != sdp->sd_heightsize[x - 1] || m) | |
304 | break; | |
305 | sdp->sd_heightsize[x] = space; | |
306 | } | |
307 | sdp->sd_max_height = x; | |
308 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
309 | ||
310 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
311 | sizeof(struct gfs2_dinode); | |
312 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
313 | for (x = 2;; x++) { | |
cd915493 SW |
314 | u64 space, d; |
315 | u32 m; | |
b3b94faa DT |
316 | |
317 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
318 | d = space; | |
319 | m = do_div(d, sdp->sd_inptrs); | |
320 | ||
321 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
322 | break; | |
323 | sdp->sd_jheightsize[x] = space; | |
324 | } | |
325 | sdp->sd_max_jheight = x; | |
326 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
b3b94faa DT |
331 | /** |
332 | * gfs2_jindex_hold - Grab a lock on the jindex | |
333 | * @sdp: The GFS2 superblock | |
334 | * @ji_gh: the holder for the jindex glock | |
335 | * | |
336 | * This is very similar to the gfs2_rindex_hold() function, except that | |
337 | * in general we hold the jindex lock for longer periods of time and | |
338 | * we grab it far less frequently (in general) then the rgrp lock. | |
339 | * | |
340 | * Returns: errno | |
341 | */ | |
342 | ||
343 | int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
344 | { | |
feaa7bba | 345 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); |
b3b94faa DT |
346 | struct qstr name; |
347 | char buf[20]; | |
348 | struct gfs2_jdesc *jd; | |
349 | int error; | |
350 | ||
351 | name.name = buf; | |
352 | ||
f55ab26a | 353 | mutex_lock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
354 | |
355 | for (;;) { | |
1c0f4872 | 356 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); |
b3b94faa DT |
357 | if (error) |
358 | break; | |
359 | ||
360 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
c752666c | 361 | name.hash = gfs2_disk_hash(name.name, name.len); |
b3b94faa | 362 | |
dbb7cae2 | 363 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); |
b3b94faa DT |
364 | if (error == -ENOENT) { |
365 | error = 0; | |
366 | break; | |
367 | } | |
368 | ||
369 | gfs2_glock_dq_uninit(ji_gh); | |
370 | ||
371 | if (error) | |
372 | break; | |
373 | ||
374 | error = -ENOMEM; | |
375 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
376 | if (!jd) | |
377 | break; | |
378 | ||
c752666c SW |
379 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL); |
380 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
381 | if (!jd->jd_inode) | |
382 | error = -ENOENT; | |
383 | else | |
384 | error = PTR_ERR(jd->jd_inode); | |
b3b94faa DT |
385 | kfree(jd); |
386 | break; | |
387 | } | |
388 | ||
389 | spin_lock(&sdp->sd_jindex_spin); | |
390 | jd->jd_jid = sdp->sd_journals++; | |
391 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
392 | spin_unlock(&sdp->sd_jindex_spin); | |
393 | } | |
394 | ||
f55ab26a | 395 | mutex_unlock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
396 | |
397 | return error; | |
398 | } | |
399 | ||
400 | /** | |
401 | * gfs2_jindex_free - Clear all the journal index information | |
402 | * @sdp: The GFS2 superblock | |
403 | * | |
404 | */ | |
405 | ||
406 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
407 | { | |
408 | struct list_head list; | |
409 | struct gfs2_jdesc *jd; | |
410 | ||
411 | spin_lock(&sdp->sd_jindex_spin); | |
412 | list_add(&list, &sdp->sd_jindex_list); | |
413 | list_del_init(&sdp->sd_jindex_list); | |
414 | sdp->sd_journals = 0; | |
415 | spin_unlock(&sdp->sd_jindex_spin); | |
416 | ||
417 | while (!list_empty(&list)) { | |
418 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
419 | list_del(&jd->jd_list); | |
7359a19c | 420 | iput(jd->jd_inode); |
b3b94faa DT |
421 | kfree(jd); |
422 | } | |
423 | } | |
424 | ||
425 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) | |
426 | { | |
427 | struct gfs2_jdesc *jd; | |
428 | int found = 0; | |
429 | ||
430 | list_for_each_entry(jd, head, jd_list) { | |
431 | if (jd->jd_jid == jid) { | |
432 | found = 1; | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | if (!found) | |
438 | jd = NULL; | |
439 | ||
440 | return jd; | |
441 | } | |
442 | ||
443 | struct gfs2_jdesc *gfs2_jdesc_find(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 | spin_unlock(&sdp->sd_jindex_spin); | |
450 | ||
451 | return jd; | |
452 | } | |
453 | ||
454 | void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid) | |
455 | { | |
456 | struct gfs2_jdesc *jd; | |
457 | ||
458 | spin_lock(&sdp->sd_jindex_spin); | |
459 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
460 | if (jd) | |
461 | jd->jd_dirty = 1; | |
462 | spin_unlock(&sdp->sd_jindex_spin); | |
463 | } | |
464 | ||
465 | struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp) | |
466 | { | |
467 | struct gfs2_jdesc *jd; | |
468 | int found = 0; | |
469 | ||
470 | spin_lock(&sdp->sd_jindex_spin); | |
471 | ||
472 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
473 | if (jd->jd_dirty) { | |
474 | jd->jd_dirty = 0; | |
475 | found = 1; | |
476 | break; | |
477 | } | |
478 | } | |
479 | spin_unlock(&sdp->sd_jindex_spin); | |
480 | ||
481 | if (!found) | |
482 | jd = NULL; | |
483 | ||
484 | return jd; | |
485 | } | |
486 | ||
487 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) | |
488 | { | |
feaa7bba SW |
489 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
490 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
491 | int ar; |
492 | int error; | |
493 | ||
feaa7bba | 494 | if (ip->i_di.di_size < (8 << 20) || ip->i_di.di_size > (1 << 30) || |
b3b94faa DT |
495 | (ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1))) { |
496 | gfs2_consist_inode(ip); | |
497 | return -EIO; | |
498 | } | |
499 | jd->jd_blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; | |
500 | ||
feaa7bba | 501 | error = gfs2_write_alloc_required(ip, 0, ip->i_di.di_size, &ar); |
b3b94faa DT |
502 | if (!error && ar) { |
503 | gfs2_consist_inode(ip); | |
504 | error = -EIO; | |
505 | } | |
506 | ||
507 | return error; | |
508 | } | |
509 | ||
b3b94faa DT |
510 | /** |
511 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
512 | * @sdp: the filesystem | |
513 | * | |
514 | * Returns: errno | |
515 | */ | |
516 | ||
517 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
518 | { | |
feaa7bba | 519 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 520 | struct gfs2_glock *j_gl = ip->i_gl; |
b3b94faa | 521 | struct gfs2_holder t_gh; |
55167622 | 522 | struct gfs2_log_header_host head; |
b3b94faa DT |
523 | int error; |
524 | ||
1c0f4872 | 525 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); |
b3b94faa DT |
526 | if (error) |
527 | return error; | |
528 | ||
5c676f6d | 529 | gfs2_meta_cache_flush(ip); |
1a14d3a6 | 530 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
531 | |
532 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
533 | if (error) | |
534 | goto fail; | |
535 | ||
536 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
537 | gfs2_consist(sdp); | |
538 | error = -EIO; | |
539 | goto fail; | |
540 | } | |
541 | ||
542 | /* Initialize some head of the log stuff */ | |
543 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
544 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
545 | ||
b3b94faa DT |
546 | error = gfs2_quota_init(sdp); |
547 | if (error) | |
a91ea69f | 548 | goto fail; |
b3b94faa DT |
549 | |
550 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
551 | ||
552 | gfs2_glock_dq_uninit(&t_gh); | |
553 | ||
554 | return 0; | |
555 | ||
a91ea69f | 556 | fail: |
b3b94faa DT |
557 | t_gh.gh_flags |= GL_NOCACHE; |
558 | gfs2_glock_dq_uninit(&t_gh); | |
559 | ||
560 | return error; | |
561 | } | |
562 | ||
563 | /** | |
564 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
565 | * @sdp: the filesystem | |
566 | * | |
567 | * Returns: errno | |
568 | */ | |
569 | ||
570 | int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
571 | { | |
572 | struct gfs2_holder t_gh; | |
573 | int error; | |
574 | ||
b3b94faa DT |
575 | gfs2_quota_sync(sdp); |
576 | gfs2_statfs_sync(sdp); | |
577 | ||
1c0f4872 SW |
578 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, |
579 | &t_gh); | |
b3b94faa DT |
580 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
581 | return error; | |
582 | ||
583 | gfs2_meta_syncfs(sdp); | |
584 | gfs2_log_shutdown(sdp); | |
585 | ||
586 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
587 | ||
588 | if (t_gh.gh_gl) | |
589 | gfs2_glock_dq_uninit(&t_gh); | |
590 | ||
b3b94faa DT |
591 | gfs2_quota_cleanup(sdp); |
592 | ||
593 | return error; | |
594 | } | |
595 | ||
596 | int gfs2_statfs_init(struct gfs2_sbd *sdp) | |
597 | { | |
feaa7bba | 598 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 599 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 600 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 601 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
602 | struct buffer_head *m_bh, *l_bh; |
603 | struct gfs2_holder gh; | |
604 | int error; | |
605 | ||
606 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
607 | &gh); | |
608 | if (error) | |
609 | return error; | |
610 | ||
611 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
612 | if (error) | |
613 | goto out; | |
614 | ||
615 | if (sdp->sd_args.ar_spectator) { | |
616 | spin_lock(&sdp->sd_statfs_spin); | |
617 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
618 | sizeof(struct gfs2_dinode)); | |
619 | spin_unlock(&sdp->sd_statfs_spin); | |
620 | } else { | |
621 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
622 | if (error) | |
623 | goto out_m_bh; | |
624 | ||
625 | spin_lock(&sdp->sd_statfs_spin); | |
626 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
627 | sizeof(struct gfs2_dinode)); | |
628 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
629 | sizeof(struct gfs2_dinode)); | |
630 | spin_unlock(&sdp->sd_statfs_spin); | |
631 | ||
632 | brelse(l_bh); | |
633 | } | |
634 | ||
a91ea69f | 635 | out_m_bh: |
b3b94faa | 636 | brelse(m_bh); |
a91ea69f | 637 | out: |
b3b94faa | 638 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
639 | return 0; |
640 | } | |
641 | ||
cd915493 SW |
642 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
643 | s64 dinodes) | |
b3b94faa | 644 | { |
feaa7bba | 645 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 646 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
647 | struct buffer_head *l_bh; |
648 | int error; | |
649 | ||
650 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
651 | if (error) | |
652 | return; | |
653 | ||
f55ab26a | 654 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 655 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 656 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
657 | |
658 | spin_lock(&sdp->sd_statfs_spin); | |
659 | l_sc->sc_total += total; | |
660 | l_sc->sc_free += free; | |
661 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 662 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
b3b94faa DT |
663 | spin_unlock(&sdp->sd_statfs_spin); |
664 | ||
665 | brelse(l_bh); | |
666 | } | |
667 | ||
668 | int gfs2_statfs_sync(struct gfs2_sbd *sdp) | |
669 | { | |
feaa7bba SW |
670 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
671 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
672 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
673 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
674 | struct gfs2_holder gh; |
675 | struct buffer_head *m_bh, *l_bh; | |
676 | int error; | |
677 | ||
678 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
679 | &gh); | |
680 | if (error) | |
681 | return error; | |
682 | ||
683 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
684 | if (error) | |
685 | goto out; | |
686 | ||
687 | spin_lock(&sdp->sd_statfs_spin); | |
688 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 689 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
690 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
691 | spin_unlock(&sdp->sd_statfs_spin); | |
692 | goto out_bh; | |
693 | } | |
694 | spin_unlock(&sdp->sd_statfs_spin); | |
695 | ||
696 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
697 | if (error) | |
698 | goto out_bh; | |
699 | ||
700 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
701 | if (error) | |
702 | goto out_bh2; | |
703 | ||
f55ab26a | 704 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 705 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 706 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
707 | |
708 | spin_lock(&sdp->sd_statfs_spin); | |
709 | m_sc->sc_total += l_sc->sc_total; | |
710 | m_sc->sc_free += l_sc->sc_free; | |
711 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
712 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
713 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
714 | 0, sizeof(struct gfs2_statfs_change)); | |
715 | spin_unlock(&sdp->sd_statfs_spin); | |
716 | ||
d4e9c4c3 | 717 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b3b94faa DT |
718 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
719 | ||
720 | gfs2_trans_end(sdp); | |
721 | ||
a91ea69f | 722 | out_bh2: |
b3b94faa | 723 | brelse(l_bh); |
a91ea69f | 724 | out_bh: |
b3b94faa | 725 | brelse(m_bh); |
a91ea69f | 726 | out: |
b3b94faa | 727 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
728 | return error; |
729 | } | |
730 | ||
731 | /** | |
732 | * gfs2_statfs_i - Do a statfs | |
733 | * @sdp: the filesystem | |
734 | * @sg: the sg structure | |
735 | * | |
736 | * Returns: errno | |
737 | */ | |
738 | ||
bd209cc0 | 739 | int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
b3b94faa | 740 | { |
bd209cc0 AV |
741 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
742 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
743 | |
744 | spin_lock(&sdp->sd_statfs_spin); | |
745 | ||
746 | *sc = *m_sc; | |
747 | sc->sc_total += l_sc->sc_total; | |
748 | sc->sc_free += l_sc->sc_free; | |
749 | sc->sc_dinodes += l_sc->sc_dinodes; | |
750 | ||
751 | spin_unlock(&sdp->sd_statfs_spin); | |
752 | ||
753 | if (sc->sc_free < 0) | |
754 | sc->sc_free = 0; | |
755 | if (sc->sc_free > sc->sc_total) | |
756 | sc->sc_free = sc->sc_total; | |
757 | if (sc->sc_dinodes < 0) | |
758 | sc->sc_dinodes = 0; | |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | /** | |
764 | * statfs_fill - fill in the sg for a given RG | |
765 | * @rgd: the RG | |
766 | * @sc: the sc structure | |
767 | * | |
768 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
769 | */ | |
770 | ||
771 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
bd209cc0 | 772 | struct gfs2_statfs_change_host *sc) |
b3b94faa DT |
773 | { |
774 | gfs2_rgrp_verify(rgd); | |
775 | sc->sc_total += rgd->rd_ri.ri_data; | |
776 | sc->sc_free += rgd->rd_rg.rg_free; | |
777 | sc->sc_dinodes += rgd->rd_rg.rg_dinodes; | |
778 | return 0; | |
779 | } | |
780 | ||
781 | /** | |
782 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
783 | * @sdp: the filesystem | |
784 | * @sc: the sc info that will be returned | |
785 | * | |
786 | * Any error (other than a signal) will cause this routine to fall back | |
787 | * to the synchronous version. | |
788 | * | |
789 | * FIXME: This really shouldn't busy wait like this. | |
790 | * | |
791 | * Returns: errno | |
792 | */ | |
793 | ||
bd209cc0 | 794 | int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
b3b94faa DT |
795 | { |
796 | struct gfs2_holder ri_gh; | |
797 | struct gfs2_rgrpd *rgd_next; | |
798 | struct gfs2_holder *gha, *gh; | |
799 | unsigned int slots = 64; | |
800 | unsigned int x; | |
801 | int done; | |
802 | int error = 0, err; | |
803 | ||
bd209cc0 | 804 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); |
b3b94faa DT |
805 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); |
806 | if (!gha) | |
807 | return -ENOMEM; | |
808 | ||
809 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
810 | if (error) | |
811 | goto out; | |
812 | ||
813 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
814 | ||
815 | for (;;) { | |
816 | done = 1; | |
817 | ||
818 | for (x = 0; x < slots; x++) { | |
819 | gh = gha + x; | |
820 | ||
821 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
822 | err = gfs2_glock_wait(gh); | |
823 | if (err) { | |
824 | gfs2_holder_uninit(gh); | |
825 | error = err; | |
826 | } else { | |
827 | if (!error) | |
5c676f6d SW |
828 | error = statfs_slow_fill( |
829 | gh->gh_gl->gl_object, sc); | |
b3b94faa DT |
830 | gfs2_glock_dq_uninit(gh); |
831 | } | |
832 | } | |
833 | ||
834 | if (gh->gh_gl) | |
835 | done = 0; | |
836 | else if (rgd_next && !error) { | |
837 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
838 | LM_ST_SHARED, | |
839 | GL_ASYNC, | |
840 | gh); | |
841 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
842 | done = 0; | |
843 | } | |
844 | ||
845 | if (signal_pending(current)) | |
846 | error = -ERESTARTSYS; | |
847 | } | |
848 | ||
849 | if (done) | |
850 | break; | |
851 | ||
852 | yield(); | |
853 | } | |
854 | ||
855 | gfs2_glock_dq_uninit(&ri_gh); | |
856 | ||
a91ea69f | 857 | out: |
b3b94faa | 858 | kfree(gha); |
b3b94faa DT |
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); | |
55167622 | 885 | struct gfs2_log_header_host lh; |
b3b94faa DT |
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 | ||
a91ea69f | 927 | out: |
b3b94faa DT |
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); | |
b3b94faa DT |
935 | return error; |
936 | } | |
937 | ||
938 | /** | |
939 | * gfs2_freeze_fs - freezes the file system | |
940 | * @sdp: the file system | |
941 | * | |
942 | * This function flushes data and meta data for all machines by | |
943 | * aquiring the transaction log exclusively. All journals are | |
944 | * ensured to be in a clean state as well. | |
945 | * | |
946 | * Returns: errno | |
947 | */ | |
948 | ||
949 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
950 | { | |
951 | int error = 0; | |
952 | ||
f55ab26a | 953 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
954 | |
955 | if (!sdp->sd_freeze_count++) { | |
956 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
957 | if (error) | |
958 | sdp->sd_freeze_count--; | |
959 | } | |
960 | ||
f55ab26a | 961 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
962 | |
963 | return error; | |
964 | } | |
965 | ||
966 | /** | |
967 | * gfs2_unfreeze_fs - unfreezes the file system | |
968 | * @sdp: the file system | |
969 | * | |
970 | * This function allows the file system to proceed by unlocking | |
971 | * the exclusively held transaction lock. Other GFS2 nodes are | |
972 | * now free to acquire the lock shared and go on with their lives. | |
973 | * | |
974 | */ | |
975 | ||
976 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
977 | { | |
f55ab26a | 978 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
979 | |
980 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
981 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
982 | ||
f55ab26a | 983 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
984 | } |
985 |