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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. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
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> |
b3b94faa DT |
17 | #include <asm/semaphore.h> |
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" | |
35 | #include "unlinked.h" | |
5c676f6d | 36 | #include "util.h" |
b3b94faa DT |
37 | |
38 | /** | |
39 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
40 | * @gt: tune | |
41 | * | |
42 | */ | |
43 | ||
44 | void gfs2_tune_init(struct gfs2_tune *gt) | |
45 | { | |
46 | spin_lock_init(>->gt_spin); | |
47 | ||
48 | gt->gt_ilimit = 100; | |
49 | gt->gt_ilimit_tries = 3; | |
50 | gt->gt_ilimit_min = 1; | |
51 | gt->gt_demote_secs = 300; | |
52 | gt->gt_incore_log_blocks = 1024; | |
53 | gt->gt_log_flush_secs = 60; | |
54 | gt->gt_jindex_refresh_secs = 60; | |
55 | gt->gt_scand_secs = 15; | |
56 | gt->gt_recoverd_secs = 60; | |
57 | gt->gt_logd_secs = 1; | |
58 | gt->gt_quotad_secs = 5; | |
59 | gt->gt_inoded_secs = 15; | |
60 | gt->gt_quota_simul_sync = 64; | |
61 | gt->gt_quota_warn_period = 10; | |
62 | gt->gt_quota_scale_num = 1; | |
63 | gt->gt_quota_scale_den = 1; | |
64 | gt->gt_quota_cache_secs = 300; | |
65 | gt->gt_quota_quantum = 60; | |
66 | gt->gt_atime_quantum = 3600; | |
67 | gt->gt_new_files_jdata = 0; | |
68 | gt->gt_new_files_directio = 0; | |
69 | gt->gt_max_atomic_write = 4 << 20; | |
70 | gt->gt_max_readahead = 1 << 18; | |
71 | gt->gt_lockdump_size = 131072; | |
72 | gt->gt_stall_secs = 600; | |
73 | gt->gt_complain_secs = 10; | |
74 | gt->gt_reclaim_limit = 5000; | |
75 | gt->gt_entries_per_readdir = 32; | |
76 | gt->gt_prefetch_secs = 10; | |
77 | gt->gt_greedy_default = HZ / 10; | |
78 | gt->gt_greedy_quantum = HZ / 40; | |
79 | gt->gt_greedy_max = HZ / 4; | |
80 | gt->gt_statfs_quantum = 30; | |
81 | gt->gt_statfs_slow = 0; | |
82 | } | |
83 | ||
84 | /** | |
85 | * gfs2_check_sb - Check superblock | |
86 | * @sdp: the filesystem | |
87 | * @sb: The superblock | |
88 | * @silent: Don't print a message if the check fails | |
89 | * | |
90 | * Checks the version code of the FS is one that we understand how to | |
91 | * read and that the sizes of the various on-disk structures have not | |
92 | * changed. | |
93 | */ | |
94 | ||
95 | int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb *sb, int silent) | |
96 | { | |
97 | unsigned int x; | |
98 | ||
99 | if (sb->sb_header.mh_magic != GFS2_MAGIC || | |
100 | sb->sb_header.mh_type != GFS2_METATYPE_SB) { | |
101 | if (!silent) | |
d92a8d48 | 102 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); |
b3b94faa DT |
103 | return -EINVAL; |
104 | } | |
105 | ||
106 | /* If format numbers match exactly, we're done. */ | |
107 | ||
108 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
109 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
110 | return 0; | |
111 | ||
112 | if (sb->sb_fs_format != GFS2_FORMAT_FS) { | |
113 | for (x = 0; gfs2_old_fs_formats[x]; x++) | |
114 | if (gfs2_old_fs_formats[x] == sb->sb_fs_format) | |
115 | break; | |
116 | ||
117 | if (!gfs2_old_fs_formats[x]) { | |
568f4c96 SW |
118 | printk(KERN_WARNING |
119 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
120 | "with ondisk format (%u, %u)\n", |
121 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
122 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
123 | printk(KERN_WARNING |
124 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
125 | return -EINVAL; |
126 | } | |
127 | } | |
128 | ||
129 | if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) { | |
130 | for (x = 0; gfs2_old_multihost_formats[x]; x++) | |
568f4c96 SW |
131 | if (gfs2_old_multihost_formats[x] == |
132 | sb->sb_multihost_format) | |
b3b94faa DT |
133 | break; |
134 | ||
135 | if (!gfs2_old_multihost_formats[x]) { | |
568f4c96 SW |
136 | printk(KERN_WARNING |
137 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
138 | "with ondisk format (%u, %u)\n", |
139 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
140 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
141 | printk(KERN_WARNING |
142 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
143 | return -EINVAL; |
144 | } | |
145 | } | |
146 | ||
147 | if (!sdp->sd_args.ar_upgrade) { | |
568f4c96 SW |
148 | printk(KERN_WARNING |
149 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
150 | "with ondisk format (%u, %u)\n", |
151 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
152 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
153 | printk(KERN_INFO |
154 | "GFS2: Use the \"upgrade\" mount option to upgrade " | |
b3b94faa | 155 | "the FS\n"); |
d92a8d48 | 156 | printk(KERN_INFO "GFS2: See the manual for more details\n"); |
b3b94faa DT |
157 | return -EINVAL; |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | /** | |
164 | * gfs2_read_sb - Read super block | |
165 | * @sdp: The GFS2 superblock | |
166 | * @gl: the glock for the superblock (assumed to be held) | |
167 | * @silent: Don't print message if mount fails | |
168 | * | |
169 | */ | |
170 | ||
171 | int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent) | |
172 | { | |
173 | struct buffer_head *bh; | |
174 | uint32_t hash_blocks, ind_blocks, leaf_blocks; | |
175 | uint32_t tmp_blocks; | |
176 | unsigned int x; | |
177 | int error; | |
178 | ||
179 | error = gfs2_meta_read(gl, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, | |
180 | DIO_FORCE | DIO_START | DIO_WAIT, &bh); | |
181 | if (error) { | |
182 | if (!silent) | |
183 | fs_err(sdp, "can't read superblock\n"); | |
184 | return error; | |
185 | } | |
186 | ||
187 | gfs2_assert(sdp, sizeof(struct gfs2_sb) <= bh->b_size); | |
188 | gfs2_sb_in(&sdp->sd_sb, bh->b_data); | |
189 | brelse(bh); | |
190 | ||
191 | error = gfs2_check_sb(sdp, &sdp->sd_sb, silent); | |
192 | if (error) | |
193 | return error; | |
194 | ||
195 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
196 | GFS2_BASIC_BLOCK_SHIFT; | |
197 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
198 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
199 | sizeof(struct gfs2_dinode)) / sizeof(uint64_t); | |
200 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
201 | sizeof(struct gfs2_meta_header)) / sizeof(uint64_t); | |
202 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
203 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
204 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
205 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(uint64_t); | |
206 | sdp->sd_ut_per_block = (sdp->sd_sb.sb_bsize - | |
207 | sizeof(struct gfs2_meta_header)) / | |
208 | sizeof(struct gfs2_unlinked_tag); | |
209 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - | |
210 | sizeof(struct gfs2_meta_header)) / | |
211 | sizeof(struct gfs2_quota_change); | |
212 | ||
213 | /* Compute maximum reservation required to add a entry to a directory */ | |
214 | ||
5c676f6d | 215 | hash_blocks = DIV_ROUND_UP(sizeof(uint64_t) * (1 << GFS2_DIR_MAX_DEPTH), |
b3b94faa DT |
216 | sdp->sd_jbsize); |
217 | ||
218 | ind_blocks = 0; | |
219 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
5c676f6d | 220 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); |
b3b94faa DT |
221 | ind_blocks += tmp_blocks; |
222 | } | |
223 | ||
224 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
225 | ||
226 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
227 | ||
228 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
229 | sizeof(struct gfs2_dinode); | |
230 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
231 | for (x = 2;; x++) { | |
232 | uint64_t space, d; | |
233 | uint32_t m; | |
234 | ||
235 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
236 | d = space; | |
237 | m = do_div(d, sdp->sd_inptrs); | |
238 | ||
239 | if (d != sdp->sd_heightsize[x - 1] || m) | |
240 | break; | |
241 | sdp->sd_heightsize[x] = space; | |
242 | } | |
243 | sdp->sd_max_height = x; | |
244 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
245 | ||
246 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
247 | sizeof(struct gfs2_dinode); | |
248 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
249 | for (x = 2;; x++) { | |
250 | uint64_t space, d; | |
251 | uint32_t m; | |
252 | ||
253 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
254 | d = space; | |
255 | m = do_div(d, sdp->sd_inptrs); | |
256 | ||
257 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
258 | break; | |
259 | sdp->sd_jheightsize[x] = space; | |
260 | } | |
261 | sdp->sd_max_jheight = x; | |
262 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | int gfs2_do_upgrade(struct gfs2_sbd *sdp, struct gfs2_glock *sb_gl) | |
268 | { | |
269 | return 0; | |
270 | } | |
271 | ||
272 | /** | |
273 | * gfs2_jindex_hold - Grab a lock on the jindex | |
274 | * @sdp: The GFS2 superblock | |
275 | * @ji_gh: the holder for the jindex glock | |
276 | * | |
277 | * This is very similar to the gfs2_rindex_hold() function, except that | |
278 | * in general we hold the jindex lock for longer periods of time and | |
279 | * we grab it far less frequently (in general) then the rgrp lock. | |
280 | * | |
281 | * Returns: errno | |
282 | */ | |
283 | ||
284 | int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
285 | { | |
5c676f6d | 286 | struct gfs2_inode *dip = sdp->sd_jindex->u.generic_ip; |
b3b94faa DT |
287 | struct qstr name; |
288 | char buf[20]; | |
289 | struct gfs2_jdesc *jd; | |
290 | int error; | |
291 | ||
292 | name.name = buf; | |
293 | ||
f55ab26a | 294 | mutex_lock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
295 | |
296 | for (;;) { | |
297 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, | |
298 | GL_LOCAL_EXCL, ji_gh); | |
299 | if (error) | |
300 | break; | |
301 | ||
302 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
c752666c | 303 | name.hash = gfs2_disk_hash(name.name, name.len); |
b3b94faa | 304 | |
c752666c | 305 | error = gfs2_dir_search(sdp->sd_jindex, |
568f4c96 | 306 | &name, NULL, NULL); |
b3b94faa DT |
307 | if (error == -ENOENT) { |
308 | error = 0; | |
309 | break; | |
310 | } | |
311 | ||
312 | gfs2_glock_dq_uninit(ji_gh); | |
313 | ||
314 | if (error) | |
315 | break; | |
316 | ||
317 | error = -ENOMEM; | |
318 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
319 | if (!jd) | |
320 | break; | |
321 | ||
c752666c SW |
322 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL); |
323 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
324 | if (!jd->jd_inode) | |
325 | error = -ENOENT; | |
326 | else | |
327 | error = PTR_ERR(jd->jd_inode); | |
b3b94faa DT |
328 | kfree(jd); |
329 | break; | |
330 | } | |
331 | ||
332 | spin_lock(&sdp->sd_jindex_spin); | |
333 | jd->jd_jid = sdp->sd_journals++; | |
334 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
335 | spin_unlock(&sdp->sd_jindex_spin); | |
336 | } | |
337 | ||
f55ab26a | 338 | mutex_unlock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
339 | |
340 | return error; | |
341 | } | |
342 | ||
343 | /** | |
344 | * gfs2_jindex_free - Clear all the journal index information | |
345 | * @sdp: The GFS2 superblock | |
346 | * | |
347 | */ | |
348 | ||
349 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
350 | { | |
351 | struct list_head list; | |
352 | struct gfs2_jdesc *jd; | |
353 | ||
354 | spin_lock(&sdp->sd_jindex_spin); | |
355 | list_add(&list, &sdp->sd_jindex_list); | |
356 | list_del_init(&sdp->sd_jindex_list); | |
357 | sdp->sd_journals = 0; | |
358 | spin_unlock(&sdp->sd_jindex_spin); | |
359 | ||
360 | while (!list_empty(&list)) { | |
361 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
362 | list_del(&jd->jd_list); | |
7359a19c | 363 | iput(jd->jd_inode); |
b3b94faa DT |
364 | kfree(jd); |
365 | } | |
366 | } | |
367 | ||
368 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) | |
369 | { | |
370 | struct gfs2_jdesc *jd; | |
371 | int found = 0; | |
372 | ||
373 | list_for_each_entry(jd, head, jd_list) { | |
374 | if (jd->jd_jid == jid) { | |
375 | found = 1; | |
376 | break; | |
377 | } | |
378 | } | |
379 | ||
380 | if (!found) | |
381 | jd = NULL; | |
382 | ||
383 | return jd; | |
384 | } | |
385 | ||
386 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
387 | { | |
388 | struct gfs2_jdesc *jd; | |
389 | ||
390 | spin_lock(&sdp->sd_jindex_spin); | |
391 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
392 | spin_unlock(&sdp->sd_jindex_spin); | |
393 | ||
394 | return jd; | |
395 | } | |
396 | ||
397 | void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid) | |
398 | { | |
399 | struct gfs2_jdesc *jd; | |
400 | ||
401 | spin_lock(&sdp->sd_jindex_spin); | |
402 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
403 | if (jd) | |
404 | jd->jd_dirty = 1; | |
405 | spin_unlock(&sdp->sd_jindex_spin); | |
406 | } | |
407 | ||
408 | struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp) | |
409 | { | |
410 | struct gfs2_jdesc *jd; | |
411 | int found = 0; | |
412 | ||
413 | spin_lock(&sdp->sd_jindex_spin); | |
414 | ||
415 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
416 | if (jd->jd_dirty) { | |
417 | jd->jd_dirty = 0; | |
418 | found = 1; | |
419 | break; | |
420 | } | |
421 | } | |
422 | spin_unlock(&sdp->sd_jindex_spin); | |
423 | ||
424 | if (!found) | |
425 | jd = NULL; | |
426 | ||
427 | return jd; | |
428 | } | |
429 | ||
430 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) | |
431 | { | |
5c676f6d | 432 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
b3b94faa DT |
433 | struct gfs2_sbd *sdp = ip->i_sbd; |
434 | int ar; | |
435 | int error; | |
436 | ||
437 | if (ip->i_di.di_size < (8 << 20) || | |
438 | ip->i_di.di_size > (1 << 30) || | |
439 | (ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1))) { | |
440 | gfs2_consist_inode(ip); | |
441 | return -EIO; | |
442 | } | |
443 | jd->jd_blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; | |
444 | ||
445 | error = gfs2_write_alloc_required(ip, | |
446 | 0, ip->i_di.di_size, | |
447 | &ar); | |
448 | if (!error && ar) { | |
449 | gfs2_consist_inode(ip); | |
450 | error = -EIO; | |
451 | } | |
452 | ||
453 | return error; | |
454 | } | |
455 | ||
b3b94faa DT |
456 | /** |
457 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
458 | * @sdp: the filesystem | |
459 | * | |
460 | * Returns: errno | |
461 | */ | |
462 | ||
463 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
464 | { | |
5c676f6d SW |
465 | struct gfs2_inode *ip = sdp->sd_jdesc->jd_inode->u.generic_ip; |
466 | struct gfs2_glock *j_gl = ip->i_gl; | |
b3b94faa DT |
467 | struct gfs2_holder t_gh; |
468 | struct gfs2_log_header head; | |
469 | int error; | |
470 | ||
471 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, | |
579b78a4 | 472 | GL_LOCAL_EXCL, &t_gh); |
b3b94faa DT |
473 | if (error) |
474 | return error; | |
475 | ||
5c676f6d | 476 | gfs2_meta_cache_flush(ip); |
b3b94faa DT |
477 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA); |
478 | ||
479 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
480 | if (error) | |
481 | goto fail; | |
482 | ||
483 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
484 | gfs2_consist(sdp); | |
485 | error = -EIO; | |
486 | goto fail; | |
487 | } | |
488 | ||
489 | /* Initialize some head of the log stuff */ | |
490 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
491 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
492 | ||
493 | error = gfs2_unlinked_init(sdp); | |
494 | if (error) | |
495 | goto fail; | |
496 | error = gfs2_quota_init(sdp); | |
497 | if (error) | |
498 | goto fail_unlinked; | |
499 | ||
500 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
501 | ||
502 | gfs2_glock_dq_uninit(&t_gh); | |
503 | ||
504 | return 0; | |
505 | ||
506 | fail_unlinked: | |
507 | gfs2_unlinked_cleanup(sdp); | |
508 | ||
509 | fail: | |
510 | t_gh.gh_flags |= GL_NOCACHE; | |
511 | gfs2_glock_dq_uninit(&t_gh); | |
512 | ||
513 | return error; | |
514 | } | |
515 | ||
516 | /** | |
517 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
518 | * @sdp: the filesystem | |
519 | * | |
520 | * Returns: errno | |
521 | */ | |
522 | ||
523 | int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
524 | { | |
525 | struct gfs2_holder t_gh; | |
526 | int error; | |
527 | ||
528 | gfs2_unlinked_dealloc(sdp); | |
529 | gfs2_quota_sync(sdp); | |
530 | gfs2_statfs_sync(sdp); | |
531 | ||
532 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, | |
579b78a4 | 533 | GL_LOCAL_EXCL | GL_NOCACHE, |
b3b94faa DT |
534 | &t_gh); |
535 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
536 | return error; | |
537 | ||
538 | gfs2_meta_syncfs(sdp); | |
539 | gfs2_log_shutdown(sdp); | |
540 | ||
541 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
542 | ||
543 | if (t_gh.gh_gl) | |
544 | gfs2_glock_dq_uninit(&t_gh); | |
545 | ||
546 | gfs2_unlinked_cleanup(sdp); | |
547 | gfs2_quota_cleanup(sdp); | |
548 | ||
549 | return error; | |
550 | } | |
551 | ||
552 | int gfs2_statfs_init(struct gfs2_sbd *sdp) | |
553 | { | |
5c676f6d | 554 | struct gfs2_inode *m_ip = sdp->sd_statfs_inode->u.generic_ip; |
b3b94faa | 555 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; |
5c676f6d | 556 | struct gfs2_inode *l_ip = sdp->sd_sc_inode->u.generic_ip; |
b3b94faa DT |
557 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; |
558 | struct buffer_head *m_bh, *l_bh; | |
559 | struct gfs2_holder gh; | |
560 | int error; | |
561 | ||
562 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
563 | &gh); | |
564 | if (error) | |
565 | return error; | |
566 | ||
567 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
568 | if (error) | |
569 | goto out; | |
570 | ||
571 | if (sdp->sd_args.ar_spectator) { | |
572 | spin_lock(&sdp->sd_statfs_spin); | |
573 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
574 | sizeof(struct gfs2_dinode)); | |
575 | spin_unlock(&sdp->sd_statfs_spin); | |
576 | } else { | |
577 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
578 | if (error) | |
579 | goto out_m_bh; | |
580 | ||
581 | spin_lock(&sdp->sd_statfs_spin); | |
582 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
583 | sizeof(struct gfs2_dinode)); | |
584 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
585 | sizeof(struct gfs2_dinode)); | |
586 | spin_unlock(&sdp->sd_statfs_spin); | |
587 | ||
588 | brelse(l_bh); | |
589 | } | |
590 | ||
591 | out_m_bh: | |
592 | brelse(m_bh); | |
593 | ||
594 | out: | |
595 | gfs2_glock_dq_uninit(&gh); | |
596 | ||
597 | return 0; | |
598 | } | |
599 | ||
600 | void gfs2_statfs_change(struct gfs2_sbd *sdp, int64_t total, int64_t free, | |
601 | int64_t dinodes) | |
602 | { | |
5c676f6d | 603 | struct gfs2_inode *l_ip = sdp->sd_sc_inode->u.generic_ip; |
b3b94faa DT |
604 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; |
605 | struct buffer_head *l_bh; | |
606 | int error; | |
607 | ||
608 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
609 | if (error) | |
610 | return; | |
611 | ||
f55ab26a | 612 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 613 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 614 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
615 | |
616 | spin_lock(&sdp->sd_statfs_spin); | |
617 | l_sc->sc_total += total; | |
618 | l_sc->sc_free += free; | |
619 | l_sc->sc_dinodes += dinodes; | |
620 | gfs2_statfs_change_out(l_sc, l_bh->b_data + | |
621 | sizeof(struct gfs2_dinode)); | |
622 | spin_unlock(&sdp->sd_statfs_spin); | |
623 | ||
624 | brelse(l_bh); | |
625 | } | |
626 | ||
627 | int gfs2_statfs_sync(struct gfs2_sbd *sdp) | |
628 | { | |
5c676f6d SW |
629 | struct gfs2_inode *m_ip = sdp->sd_statfs_inode->u.generic_ip; |
630 | struct gfs2_inode *l_ip = sdp->sd_sc_inode->u.generic_ip; | |
b3b94faa DT |
631 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; |
632 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; | |
633 | struct gfs2_holder gh; | |
634 | struct buffer_head *m_bh, *l_bh; | |
635 | int error; | |
636 | ||
637 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
638 | &gh); | |
639 | if (error) | |
640 | return error; | |
641 | ||
642 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
643 | if (error) | |
644 | goto out; | |
645 | ||
646 | spin_lock(&sdp->sd_statfs_spin); | |
647 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
648 | sizeof(struct gfs2_dinode)); | |
649 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { | |
650 | spin_unlock(&sdp->sd_statfs_spin); | |
651 | goto out_bh; | |
652 | } | |
653 | spin_unlock(&sdp->sd_statfs_spin); | |
654 | ||
655 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
656 | if (error) | |
657 | goto out_bh; | |
658 | ||
659 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
660 | if (error) | |
661 | goto out_bh2; | |
662 | ||
f55ab26a | 663 | mutex_lock(&sdp->sd_statfs_mutex); |
d4e9c4c3 | 664 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
f55ab26a | 665 | mutex_unlock(&sdp->sd_statfs_mutex); |
b3b94faa DT |
666 | |
667 | spin_lock(&sdp->sd_statfs_spin); | |
668 | m_sc->sc_total += l_sc->sc_total; | |
669 | m_sc->sc_free += l_sc->sc_free; | |
670 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
671 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
672 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
673 | 0, sizeof(struct gfs2_statfs_change)); | |
674 | spin_unlock(&sdp->sd_statfs_spin); | |
675 | ||
d4e9c4c3 | 676 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b3b94faa DT |
677 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
678 | ||
679 | gfs2_trans_end(sdp); | |
680 | ||
681 | out_bh2: | |
682 | brelse(l_bh); | |
683 | ||
684 | out_bh: | |
685 | brelse(m_bh); | |
686 | ||
687 | out: | |
688 | gfs2_glock_dq_uninit(&gh); | |
689 | ||
690 | return error; | |
691 | } | |
692 | ||
693 | /** | |
694 | * gfs2_statfs_i - Do a statfs | |
695 | * @sdp: the filesystem | |
696 | * @sg: the sg structure | |
697 | * | |
698 | * Returns: errno | |
699 | */ | |
700 | ||
701 | int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc) | |
702 | { | |
703 | struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master; | |
704 | struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local; | |
705 | ||
706 | spin_lock(&sdp->sd_statfs_spin); | |
707 | ||
708 | *sc = *m_sc; | |
709 | sc->sc_total += l_sc->sc_total; | |
710 | sc->sc_free += l_sc->sc_free; | |
711 | sc->sc_dinodes += l_sc->sc_dinodes; | |
712 | ||
713 | spin_unlock(&sdp->sd_statfs_spin); | |
714 | ||
715 | if (sc->sc_free < 0) | |
716 | sc->sc_free = 0; | |
717 | if (sc->sc_free > sc->sc_total) | |
718 | sc->sc_free = sc->sc_total; | |
719 | if (sc->sc_dinodes < 0) | |
720 | sc->sc_dinodes = 0; | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | /** | |
726 | * statfs_fill - fill in the sg for a given RG | |
727 | * @rgd: the RG | |
728 | * @sc: the sc structure | |
729 | * | |
730 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
731 | */ | |
732 | ||
733 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
734 | struct gfs2_statfs_change *sc) | |
735 | { | |
736 | gfs2_rgrp_verify(rgd); | |
737 | sc->sc_total += rgd->rd_ri.ri_data; | |
738 | sc->sc_free += rgd->rd_rg.rg_free; | |
739 | sc->sc_dinodes += rgd->rd_rg.rg_dinodes; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | /** | |
744 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
745 | * @sdp: the filesystem | |
746 | * @sc: the sc info that will be returned | |
747 | * | |
748 | * Any error (other than a signal) will cause this routine to fall back | |
749 | * to the synchronous version. | |
750 | * | |
751 | * FIXME: This really shouldn't busy wait like this. | |
752 | * | |
753 | * Returns: errno | |
754 | */ | |
755 | ||
756 | int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc) | |
757 | { | |
758 | struct gfs2_holder ri_gh; | |
759 | struct gfs2_rgrpd *rgd_next; | |
760 | struct gfs2_holder *gha, *gh; | |
761 | unsigned int slots = 64; | |
762 | unsigned int x; | |
763 | int done; | |
764 | int error = 0, err; | |
765 | ||
766 | memset(sc, 0, sizeof(struct gfs2_statfs_change)); | |
767 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
768 | if (!gha) | |
769 | return -ENOMEM; | |
770 | ||
771 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
772 | if (error) | |
773 | goto out; | |
774 | ||
775 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
776 | ||
777 | for (;;) { | |
778 | done = 1; | |
779 | ||
780 | for (x = 0; x < slots; x++) { | |
781 | gh = gha + x; | |
782 | ||
783 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
784 | err = gfs2_glock_wait(gh); | |
785 | if (err) { | |
786 | gfs2_holder_uninit(gh); | |
787 | error = err; | |
788 | } else { | |
789 | if (!error) | |
5c676f6d SW |
790 | error = statfs_slow_fill( |
791 | gh->gh_gl->gl_object, sc); | |
b3b94faa DT |
792 | gfs2_glock_dq_uninit(gh); |
793 | } | |
794 | } | |
795 | ||
796 | if (gh->gh_gl) | |
797 | done = 0; | |
798 | else if (rgd_next && !error) { | |
799 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
800 | LM_ST_SHARED, | |
801 | GL_ASYNC, | |
802 | gh); | |
803 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
804 | done = 0; | |
805 | } | |
806 | ||
807 | if (signal_pending(current)) | |
808 | error = -ERESTARTSYS; | |
809 | } | |
810 | ||
811 | if (done) | |
812 | break; | |
813 | ||
814 | yield(); | |
815 | } | |
816 | ||
817 | gfs2_glock_dq_uninit(&ri_gh); | |
818 | ||
819 | out: | |
820 | kfree(gha); | |
821 | ||
822 | return error; | |
823 | } | |
824 | ||
825 | struct lfcc { | |
826 | struct list_head list; | |
827 | struct gfs2_holder gh; | |
828 | }; | |
829 | ||
830 | /** | |
831 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
832 | * journals are clean | |
833 | * @sdp: the file system | |
834 | * @state: the state to put the transaction lock into | |
835 | * @t_gh: the hold on the transaction lock | |
836 | * | |
837 | * Returns: errno | |
838 | */ | |
839 | ||
840 | int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, struct gfs2_holder *t_gh) | |
841 | { | |
5c676f6d | 842 | struct gfs2_inode *ip; |
b3b94faa DT |
843 | struct gfs2_holder ji_gh; |
844 | struct gfs2_jdesc *jd; | |
845 | struct lfcc *lfcc; | |
846 | LIST_HEAD(list); | |
847 | struct gfs2_log_header lh; | |
848 | int error; | |
849 | ||
850 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
851 | if (error) | |
852 | return error; | |
853 | ||
854 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
855 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
856 | if (!lfcc) { | |
857 | error = -ENOMEM; | |
858 | goto out; | |
859 | } | |
5c676f6d SW |
860 | ip = jd->jd_inode->u.generic_ip; |
861 | error = gfs2_glock_nq_init(ip->i_gl, | |
568f4c96 | 862 | LM_ST_SHARED, 0, |
b3b94faa DT |
863 | &lfcc->gh); |
864 | if (error) { | |
865 | kfree(lfcc); | |
866 | goto out; | |
867 | } | |
868 | list_add(&lfcc->list, &list); | |
869 | } | |
870 | ||
871 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, | |
579b78a4 | 872 | LM_FLAG_PRIORITY | GL_NOCACHE, |
b3b94faa DT |
873 | t_gh); |
874 | ||
875 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
876 | error = gfs2_jdesc_check(jd); | |
877 | if (error) | |
878 | break; | |
879 | error = gfs2_find_jhead(jd, &lh); | |
880 | if (error) | |
881 | break; | |
882 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
883 | error = -EBUSY; | |
884 | break; | |
885 | } | |
886 | } | |
887 | ||
888 | if (error) | |
889 | gfs2_glock_dq_uninit(t_gh); | |
890 | ||
891 | out: | |
892 | while (!list_empty(&list)) { | |
893 | lfcc = list_entry(list.next, struct lfcc, list); | |
894 | list_del(&lfcc->list); | |
895 | gfs2_glock_dq_uninit(&lfcc->gh); | |
896 | kfree(lfcc); | |
897 | } | |
898 | gfs2_glock_dq_uninit(&ji_gh); | |
899 | ||
900 | return error; | |
901 | } | |
902 | ||
903 | /** | |
904 | * gfs2_freeze_fs - freezes the file system | |
905 | * @sdp: the file system | |
906 | * | |
907 | * This function flushes data and meta data for all machines by | |
908 | * aquiring the transaction log exclusively. All journals are | |
909 | * ensured to be in a clean state as well. | |
910 | * | |
911 | * Returns: errno | |
912 | */ | |
913 | ||
914 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
915 | { | |
916 | int error = 0; | |
917 | ||
f55ab26a | 918 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
919 | |
920 | if (!sdp->sd_freeze_count++) { | |
921 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
922 | if (error) | |
923 | sdp->sd_freeze_count--; | |
924 | } | |
925 | ||
f55ab26a | 926 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
927 | |
928 | return error; | |
929 | } | |
930 | ||
931 | /** | |
932 | * gfs2_unfreeze_fs - unfreezes the file system | |
933 | * @sdp: the file system | |
934 | * | |
935 | * This function allows the file system to proceed by unlocking | |
936 | * the exclusively held transaction lock. Other GFS2 nodes are | |
937 | * now free to acquire the lock shared and go on with their lives. | |
938 | * | |
939 | */ | |
940 | ||
941 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
942 | { | |
f55ab26a | 943 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
944 | |
945 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
946 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
947 | ||
f55ab26a | 948 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
949 | } |
950 |