Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
da6dd40d | 3 | * Copyright (C) 2004-2007 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 | ||
9e6e0a12 | 10 | #include <linux/bio.h> |
b3b94faa DT |
11 | #include <linux/sched.h> |
12 | #include <linux/slab.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/completion.h> | |
15 | #include <linux/buffer_head.h> | |
9e6e0a12 SW |
16 | #include <linux/statfs.h> |
17 | #include <linux/seq_file.h> | |
18 | #include <linux/mount.h> | |
19 | #include <linux/kthread.h> | |
20 | #include <linux/delay.h> | |
5c676f6d | 21 | #include <linux/gfs2_ondisk.h> |
9e6e0a12 SW |
22 | #include <linux/crc32.h> |
23 | #include <linux/time.h> | |
e402746a | 24 | #include <linux/wait.h> |
a9185b41 | 25 | #include <linux/writeback.h> |
b3b94faa DT |
26 | |
27 | #include "gfs2.h" | |
5c676f6d | 28 | #include "incore.h" |
b3b94faa DT |
29 | #include "bmap.h" |
30 | #include "dir.h" | |
b3b94faa DT |
31 | #include "glock.h" |
32 | #include "glops.h" | |
33 | #include "inode.h" | |
34 | #include "log.h" | |
35 | #include "meta_io.h" | |
36 | #include "quota.h" | |
37 | #include "recovery.h" | |
38 | #include "rgrp.h" | |
39 | #include "super.h" | |
40 | #include "trans.h" | |
5c676f6d | 41 | #include "util.h" |
9e6e0a12 | 42 | #include "sys.h" |
307cf6e6 | 43 | #include "xattr.h" |
9e6e0a12 SW |
44 | |
45 | #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) | |
46 | ||
47 | enum { | |
48 | Opt_lockproto, | |
49 | Opt_locktable, | |
50 | Opt_hostdata, | |
51 | Opt_spectator, | |
52 | Opt_ignore_local_fs, | |
53 | Opt_localflocks, | |
54 | Opt_localcaching, | |
55 | Opt_debug, | |
56 | Opt_nodebug, | |
57 | Opt_upgrade, | |
58 | Opt_acl, | |
59 | Opt_noacl, | |
60 | Opt_quota_off, | |
61 | Opt_quota_account, | |
62 | Opt_quota_on, | |
63 | Opt_quota, | |
64 | Opt_noquota, | |
65 | Opt_suiddir, | |
66 | Opt_nosuiddir, | |
67 | Opt_data_writeback, | |
68 | Opt_data_ordered, | |
69 | Opt_meta, | |
70 | Opt_discard, | |
71 | Opt_nodiscard, | |
72 | Opt_commit, | |
d34843d0 BP |
73 | Opt_err_withdraw, |
74 | Opt_err_panic, | |
3d3c10f2 BM |
75 | Opt_statfs_quantum, |
76 | Opt_statfs_percent, | |
77 | Opt_quota_quantum, | |
f25934c5 CH |
78 | Opt_barrier, |
79 | Opt_nobarrier, | |
9e6e0a12 SW |
80 | Opt_error, |
81 | }; | |
82 | ||
83 | static const match_table_t tokens = { | |
84 | {Opt_lockproto, "lockproto=%s"}, | |
85 | {Opt_locktable, "locktable=%s"}, | |
86 | {Opt_hostdata, "hostdata=%s"}, | |
87 | {Opt_spectator, "spectator"}, | |
43f74c19 | 88 | {Opt_spectator, "norecovery"}, |
9e6e0a12 SW |
89 | {Opt_ignore_local_fs, "ignore_local_fs"}, |
90 | {Opt_localflocks, "localflocks"}, | |
91 | {Opt_localcaching, "localcaching"}, | |
92 | {Opt_debug, "debug"}, | |
93 | {Opt_nodebug, "nodebug"}, | |
94 | {Opt_upgrade, "upgrade"}, | |
95 | {Opt_acl, "acl"}, | |
96 | {Opt_noacl, "noacl"}, | |
97 | {Opt_quota_off, "quota=off"}, | |
98 | {Opt_quota_account, "quota=account"}, | |
99 | {Opt_quota_on, "quota=on"}, | |
100 | {Opt_quota, "quota"}, | |
101 | {Opt_noquota, "noquota"}, | |
102 | {Opt_suiddir, "suiddir"}, | |
103 | {Opt_nosuiddir, "nosuiddir"}, | |
104 | {Opt_data_writeback, "data=writeback"}, | |
105 | {Opt_data_ordered, "data=ordered"}, | |
106 | {Opt_meta, "meta"}, | |
107 | {Opt_discard, "discard"}, | |
108 | {Opt_nodiscard, "nodiscard"}, | |
109 | {Opt_commit, "commit=%d"}, | |
d34843d0 BP |
110 | {Opt_err_withdraw, "errors=withdraw"}, |
111 | {Opt_err_panic, "errors=panic"}, | |
3d3c10f2 BM |
112 | {Opt_statfs_quantum, "statfs_quantum=%d"}, |
113 | {Opt_statfs_percent, "statfs_percent=%d"}, | |
114 | {Opt_quota_quantum, "quota_quantum=%d"}, | |
f25934c5 CH |
115 | {Opt_barrier, "barrier"}, |
116 | {Opt_nobarrier, "nobarrier"}, | |
9e6e0a12 SW |
117 | {Opt_error, NULL} |
118 | }; | |
119 | ||
120 | /** | |
121 | * gfs2_mount_args - Parse mount options | |
f55073ff SW |
122 | * @args: The structure into which the parsed options will be written |
123 | * @options: The options to parse | |
9e6e0a12 SW |
124 | * |
125 | * Return: errno | |
126 | */ | |
127 | ||
f55073ff | 128 | int gfs2_mount_args(struct gfs2_args *args, char *options) |
9e6e0a12 SW |
129 | { |
130 | char *o; | |
131 | int token; | |
132 | substring_t tmp[MAX_OPT_ARGS]; | |
133 | int rv; | |
134 | ||
135 | /* Split the options into tokens with the "," character and | |
136 | process them */ | |
137 | ||
138 | while (1) { | |
139 | o = strsep(&options, ","); | |
140 | if (o == NULL) | |
141 | break; | |
142 | if (*o == '\0') | |
143 | continue; | |
144 | ||
145 | token = match_token(o, tokens, tmp); | |
146 | switch (token) { | |
147 | case Opt_lockproto: | |
148 | match_strlcpy(args->ar_lockproto, &tmp[0], | |
149 | GFS2_LOCKNAME_LEN); | |
150 | break; | |
151 | case Opt_locktable: | |
152 | match_strlcpy(args->ar_locktable, &tmp[0], | |
153 | GFS2_LOCKNAME_LEN); | |
154 | break; | |
155 | case Opt_hostdata: | |
156 | match_strlcpy(args->ar_hostdata, &tmp[0], | |
157 | GFS2_LOCKNAME_LEN); | |
158 | break; | |
159 | case Opt_spectator: | |
160 | args->ar_spectator = 1; | |
161 | break; | |
162 | case Opt_ignore_local_fs: | |
f57a024e | 163 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
164 | break; |
165 | case Opt_localflocks: | |
166 | args->ar_localflocks = 1; | |
167 | break; | |
168 | case Opt_localcaching: | |
c2048b00 | 169 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
170 | break; |
171 | case Opt_debug: | |
d34843d0 | 172 | if (args->ar_errors == GFS2_ERRORS_PANIC) { |
f55073ff | 173 | printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " |
d34843d0 BP |
174 | "are mutually exclusive.\n"); |
175 | return -EINVAL; | |
176 | } | |
9e6e0a12 SW |
177 | args->ar_debug = 1; |
178 | break; | |
179 | case Opt_nodebug: | |
180 | args->ar_debug = 0; | |
181 | break; | |
182 | case Opt_upgrade: | |
c80dbb58 | 183 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
184 | break; |
185 | case Opt_acl: | |
186 | args->ar_posix_acl = 1; | |
187 | break; | |
188 | case Opt_noacl: | |
189 | args->ar_posix_acl = 0; | |
190 | break; | |
191 | case Opt_quota_off: | |
192 | case Opt_noquota: | |
193 | args->ar_quota = GFS2_QUOTA_OFF; | |
194 | break; | |
195 | case Opt_quota_account: | |
196 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
197 | break; | |
198 | case Opt_quota_on: | |
199 | case Opt_quota: | |
200 | args->ar_quota = GFS2_QUOTA_ON; | |
201 | break; | |
202 | case Opt_suiddir: | |
203 | args->ar_suiddir = 1; | |
204 | break; | |
205 | case Opt_nosuiddir: | |
206 | args->ar_suiddir = 0; | |
207 | break; | |
208 | case Opt_data_writeback: | |
209 | args->ar_data = GFS2_DATA_WRITEBACK; | |
210 | break; | |
211 | case Opt_data_ordered: | |
212 | args->ar_data = GFS2_DATA_ORDERED; | |
213 | break; | |
214 | case Opt_meta: | |
215 | args->ar_meta = 1; | |
216 | break; | |
217 | case Opt_discard: | |
218 | args->ar_discard = 1; | |
219 | break; | |
220 | case Opt_nodiscard: | |
221 | args->ar_discard = 0; | |
222 | break; | |
223 | case Opt_commit: | |
224 | rv = match_int(&tmp[0], &args->ar_commit); | |
225 | if (rv || args->ar_commit <= 0) { | |
f55073ff | 226 | printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); |
9e6e0a12 SW |
227 | return rv ? rv : -EINVAL; |
228 | } | |
229 | break; | |
3d3c10f2 BM |
230 | case Opt_statfs_quantum: |
231 | rv = match_int(&tmp[0], &args->ar_statfs_quantum); | |
232 | if (rv || args->ar_statfs_quantum < 0) { | |
233 | printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); | |
234 | return rv ? rv : -EINVAL; | |
235 | } | |
236 | break; | |
237 | case Opt_quota_quantum: | |
238 | rv = match_int(&tmp[0], &args->ar_quota_quantum); | |
239 | if (rv || args->ar_quota_quantum <= 0) { | |
240 | printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); | |
241 | return rv ? rv : -EINVAL; | |
242 | } | |
243 | break; | |
244 | case Opt_statfs_percent: | |
245 | rv = match_int(&tmp[0], &args->ar_statfs_percent); | |
246 | if (rv || args->ar_statfs_percent < 0 || | |
247 | args->ar_statfs_percent > 100) { | |
248 | printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); | |
249 | return rv ? rv : -EINVAL; | |
250 | } | |
251 | break; | |
d34843d0 BP |
252 | case Opt_err_withdraw: |
253 | args->ar_errors = GFS2_ERRORS_WITHDRAW; | |
254 | break; | |
255 | case Opt_err_panic: | |
256 | if (args->ar_debug) { | |
f55073ff | 257 | printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " |
d34843d0 BP |
258 | "are mutually exclusive.\n"); |
259 | return -EINVAL; | |
260 | } | |
261 | args->ar_errors = GFS2_ERRORS_PANIC; | |
262 | break; | |
f25934c5 CH |
263 | case Opt_barrier: |
264 | args->ar_nobarrier = 0; | |
265 | break; | |
266 | case Opt_nobarrier: | |
267 | args->ar_nobarrier = 1; | |
268 | break; | |
9e6e0a12 SW |
269 | case Opt_error: |
270 | default: | |
f55073ff | 271 | printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); |
9e6e0a12 SW |
272 | return -EINVAL; |
273 | } | |
274 | } | |
275 | ||
276 | return 0; | |
277 | } | |
b3b94faa | 278 | |
fefc03bf SW |
279 | /** |
280 | * gfs2_jindex_free - Clear all the journal index information | |
281 | * @sdp: The GFS2 superblock | |
282 | * | |
283 | */ | |
284 | ||
285 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
286 | { | |
287 | struct list_head list, *head; | |
288 | struct gfs2_jdesc *jd; | |
289 | struct gfs2_journal_extent *jext; | |
290 | ||
291 | spin_lock(&sdp->sd_jindex_spin); | |
292 | list_add(&list, &sdp->sd_jindex_list); | |
293 | list_del_init(&sdp->sd_jindex_list); | |
294 | sdp->sd_journals = 0; | |
295 | spin_unlock(&sdp->sd_jindex_spin); | |
296 | ||
297 | while (!list_empty(&list)) { | |
298 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
299 | head = &jd->extent_list; | |
300 | while (!list_empty(head)) { | |
301 | jext = list_entry(head->next, | |
302 | struct gfs2_journal_extent, | |
303 | extent_list); | |
304 | list_del(&jext->extent_list); | |
305 | kfree(jext); | |
306 | } | |
307 | list_del(&jd->jd_list); | |
308 | iput(jd->jd_inode); | |
309 | kfree(jd); | |
310 | } | |
311 | } | |
312 | ||
b3b94faa DT |
313 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) |
314 | { | |
315 | struct gfs2_jdesc *jd; | |
316 | int found = 0; | |
317 | ||
318 | list_for_each_entry(jd, head, jd_list) { | |
319 | if (jd->jd_jid == jid) { | |
320 | found = 1; | |
321 | break; | |
322 | } | |
323 | } | |
324 | ||
325 | if (!found) | |
326 | jd = NULL; | |
327 | ||
328 | return jd; | |
329 | } | |
330 | ||
331 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
332 | { | |
333 | struct gfs2_jdesc *jd; | |
334 | ||
335 | spin_lock(&sdp->sd_jindex_spin); | |
336 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
337 | spin_unlock(&sdp->sd_jindex_spin); | |
338 | ||
339 | return jd; | |
340 | } | |
341 | ||
b3b94faa DT |
342 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) |
343 | { | |
feaa7bba SW |
344 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
345 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
a2e0f799 | 346 | u64 size = i_size_read(jd->jd_inode); |
b3b94faa | 347 | |
a2e0f799 | 348 | if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, 1 << 30)) |
b3b94faa | 349 | return -EIO; |
b3b94faa | 350 | |
a2e0f799 SW |
351 | jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; |
352 | ||
353 | if (gfs2_write_alloc_required(ip, 0, size)) { | |
b3b94faa | 354 | gfs2_consist_inode(ip); |
461cb419 | 355 | return -EIO; |
b3b94faa DT |
356 | } |
357 | ||
461cb419 | 358 | return 0; |
b3b94faa DT |
359 | } |
360 | ||
b3b94faa DT |
361 | /** |
362 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
363 | * @sdp: the filesystem | |
364 | * | |
365 | * Returns: errno | |
366 | */ | |
367 | ||
368 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
369 | { | |
feaa7bba | 370 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 371 | struct gfs2_glock *j_gl = ip->i_gl; |
b3b94faa | 372 | struct gfs2_holder t_gh; |
55167622 | 373 | struct gfs2_log_header_host head; |
b3b94faa DT |
374 | int error; |
375 | ||
1c0f4872 | 376 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); |
b3b94faa DT |
377 | if (error) |
378 | return error; | |
379 | ||
1a14d3a6 | 380 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
381 | |
382 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
383 | if (error) | |
384 | goto fail; | |
385 | ||
386 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
387 | gfs2_consist(sdp); | |
388 | error = -EIO; | |
389 | goto fail; | |
390 | } | |
391 | ||
392 | /* Initialize some head of the log stuff */ | |
393 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
394 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
395 | ||
b3b94faa DT |
396 | error = gfs2_quota_init(sdp); |
397 | if (error) | |
a91ea69f | 398 | goto fail; |
b3b94faa DT |
399 | |
400 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
401 | ||
402 | gfs2_glock_dq_uninit(&t_gh); | |
403 | ||
404 | return 0; | |
405 | ||
a91ea69f | 406 | fail: |
b3b94faa DT |
407 | t_gh.gh_flags |= GL_NOCACHE; |
408 | gfs2_glock_dq_uninit(&t_gh); | |
409 | ||
410 | return error; | |
411 | } | |
412 | ||
1946f70a | 413 | void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
bb8d8a6f SW |
414 | { |
415 | const struct gfs2_statfs_change *str = buf; | |
416 | ||
417 | sc->sc_total = be64_to_cpu(str->sc_total); | |
418 | sc->sc_free = be64_to_cpu(str->sc_free); | |
419 | sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); | |
420 | } | |
421 | ||
422 | static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) | |
423 | { | |
424 | struct gfs2_statfs_change *str = buf; | |
425 | ||
426 | str->sc_total = cpu_to_be64(sc->sc_total); | |
427 | str->sc_free = cpu_to_be64(sc->sc_free); | |
428 | str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); | |
429 | } | |
430 | ||
b3b94faa DT |
431 | int gfs2_statfs_init(struct gfs2_sbd *sdp) |
432 | { | |
feaa7bba | 433 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 434 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 435 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 436 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
437 | struct buffer_head *m_bh, *l_bh; |
438 | struct gfs2_holder gh; | |
439 | int error; | |
440 | ||
441 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
442 | &gh); | |
443 | if (error) | |
444 | return error; | |
445 | ||
446 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
447 | if (error) | |
448 | goto out; | |
449 | ||
450 | if (sdp->sd_args.ar_spectator) { | |
451 | spin_lock(&sdp->sd_statfs_spin); | |
452 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
453 | sizeof(struct gfs2_dinode)); | |
454 | spin_unlock(&sdp->sd_statfs_spin); | |
455 | } else { | |
456 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
457 | if (error) | |
458 | goto out_m_bh; | |
459 | ||
460 | spin_lock(&sdp->sd_statfs_spin); | |
461 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
462 | sizeof(struct gfs2_dinode)); | |
463 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
464 | sizeof(struct gfs2_dinode)); | |
465 | spin_unlock(&sdp->sd_statfs_spin); | |
466 | ||
467 | brelse(l_bh); | |
468 | } | |
469 | ||
a91ea69f | 470 | out_m_bh: |
b3b94faa | 471 | brelse(m_bh); |
a91ea69f | 472 | out: |
b3b94faa | 473 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
474 | return 0; |
475 | } | |
476 | ||
cd915493 SW |
477 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
478 | s64 dinodes) | |
b3b94faa | 479 | { |
feaa7bba | 480 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 481 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
3d3c10f2 | 482 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
b3b94faa | 483 | struct buffer_head *l_bh; |
c14f5735 BM |
484 | s64 x, y; |
485 | int need_sync = 0; | |
b3b94faa DT |
486 | int error; |
487 | ||
488 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
489 | if (error) | |
490 | return; | |
491 | ||
d4e9c4c3 | 492 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
b3b94faa DT |
493 | |
494 | spin_lock(&sdp->sd_statfs_spin); | |
495 | l_sc->sc_total += total; | |
496 | l_sc->sc_free += free; | |
497 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 498 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
c14f5735 BM |
499 | if (sdp->sd_args.ar_statfs_percent) { |
500 | x = 100 * l_sc->sc_free; | |
501 | y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; | |
502 | if (x >= y || x <= -y) | |
503 | need_sync = 1; | |
504 | } | |
b3b94faa DT |
505 | spin_unlock(&sdp->sd_statfs_spin); |
506 | ||
507 | brelse(l_bh); | |
c14f5735 | 508 | if (need_sync) |
3d3c10f2 | 509 | gfs2_wake_up_statfs(sdp); |
b3b94faa DT |
510 | } |
511 | ||
1946f70a BM |
512 | void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, |
513 | struct buffer_head *l_bh) | |
514 | { | |
515 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); | |
516 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
517 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
518 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
519 | ||
520 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); | |
521 | ||
522 | spin_lock(&sdp->sd_statfs_spin); | |
523 | m_sc->sc_total += l_sc->sc_total; | |
524 | m_sc->sc_free += l_sc->sc_free; | |
525 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
526 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
527 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
528 | 0, sizeof(struct gfs2_statfs_change)); | |
529 | spin_unlock(&sdp->sd_statfs_spin); | |
530 | ||
531 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); | |
532 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); | |
533 | } | |
534 | ||
8c42d637 | 535 | int gfs2_statfs_sync(struct super_block *sb, int type) |
b3b94faa | 536 | { |
8c42d637 | 537 | struct gfs2_sbd *sdp = sb->s_fs_info; |
feaa7bba SW |
538 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
539 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
540 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
541 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
542 | struct gfs2_holder gh; |
543 | struct buffer_head *m_bh, *l_bh; | |
544 | int error; | |
545 | ||
546 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
547 | &gh); | |
548 | if (error) | |
549 | return error; | |
550 | ||
551 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
552 | if (error) | |
553 | goto out; | |
554 | ||
555 | spin_lock(&sdp->sd_statfs_spin); | |
556 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 557 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
558 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
559 | spin_unlock(&sdp->sd_statfs_spin); | |
560 | goto out_bh; | |
561 | } | |
562 | spin_unlock(&sdp->sd_statfs_spin); | |
563 | ||
564 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
565 | if (error) | |
566 | goto out_bh; | |
567 | ||
568 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
569 | if (error) | |
570 | goto out_bh2; | |
571 | ||
1946f70a | 572 | update_statfs(sdp, m_bh, l_bh); |
3d3c10f2 | 573 | sdp->sd_statfs_force_sync = 0; |
b3b94faa DT |
574 | |
575 | gfs2_trans_end(sdp); | |
576 | ||
a91ea69f | 577 | out_bh2: |
b3b94faa | 578 | brelse(l_bh); |
a91ea69f | 579 | out_bh: |
b3b94faa | 580 | brelse(m_bh); |
a91ea69f | 581 | out: |
b3b94faa | 582 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
583 | return error; |
584 | } | |
585 | ||
b3b94faa DT |
586 | struct lfcc { |
587 | struct list_head list; | |
588 | struct gfs2_holder gh; | |
589 | }; | |
590 | ||
591 | /** | |
592 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
593 | * journals are clean | |
594 | * @sdp: the file system | |
595 | * @state: the state to put the transaction lock into | |
596 | * @t_gh: the hold on the transaction lock | |
597 | * | |
598 | * Returns: errno | |
599 | */ | |
600 | ||
08bc2dbc AB |
601 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
602 | struct gfs2_holder *t_gh) | |
b3b94faa | 603 | { |
5c676f6d | 604 | struct gfs2_inode *ip; |
b3b94faa DT |
605 | struct gfs2_jdesc *jd; |
606 | struct lfcc *lfcc; | |
607 | LIST_HEAD(list); | |
55167622 | 608 | struct gfs2_log_header_host lh; |
b3b94faa DT |
609 | int error; |
610 | ||
b3b94faa DT |
611 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
612 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
613 | if (!lfcc) { | |
614 | error = -ENOMEM; | |
615 | goto out; | |
616 | } | |
feaa7bba SW |
617 | ip = GFS2_I(jd->jd_inode); |
618 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
619 | if (error) { |
620 | kfree(lfcc); | |
621 | goto out; | |
622 | } | |
623 | list_add(&lfcc->list, &list); | |
624 | } | |
625 | ||
626 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, | |
6802e340 | 627 | GL_NOCACHE, t_gh); |
b3b94faa DT |
628 | |
629 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
630 | error = gfs2_jdesc_check(jd); | |
631 | if (error) | |
632 | break; | |
633 | error = gfs2_find_jhead(jd, &lh); | |
634 | if (error) | |
635 | break; | |
636 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
637 | error = -EBUSY; | |
638 | break; | |
639 | } | |
640 | } | |
641 | ||
642 | if (error) | |
643 | gfs2_glock_dq_uninit(t_gh); | |
644 | ||
a91ea69f | 645 | out: |
b3b94faa DT |
646 | while (!list_empty(&list)) { |
647 | lfcc = list_entry(list.next, struct lfcc, list); | |
648 | list_del(&lfcc->list); | |
649 | gfs2_glock_dq_uninit(&lfcc->gh); | |
650 | kfree(lfcc); | |
651 | } | |
b3b94faa DT |
652 | return error; |
653 | } | |
654 | ||
655 | /** | |
656 | * gfs2_freeze_fs - freezes the file system | |
657 | * @sdp: the file system | |
658 | * | |
659 | * This function flushes data and meta data for all machines by | |
660 | * aquiring the transaction log exclusively. All journals are | |
661 | * ensured to be in a clean state as well. | |
662 | * | |
663 | * Returns: errno | |
664 | */ | |
665 | ||
666 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
667 | { | |
668 | int error = 0; | |
669 | ||
f55ab26a | 670 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
671 | |
672 | if (!sdp->sd_freeze_count++) { | |
673 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
674 | if (error) | |
675 | sdp->sd_freeze_count--; | |
676 | } | |
677 | ||
f55ab26a | 678 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
679 | |
680 | return error; | |
681 | } | |
682 | ||
683 | /** | |
684 | * gfs2_unfreeze_fs - unfreezes the file system | |
685 | * @sdp: the file system | |
686 | * | |
687 | * This function allows the file system to proceed by unlocking | |
688 | * the exclusively held transaction lock. Other GFS2 nodes are | |
689 | * now free to acquire the lock shared and go on with their lives. | |
690 | * | |
691 | */ | |
692 | ||
693 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
694 | { | |
f55ab26a | 695 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
696 | |
697 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
698 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
699 | ||
f55ab26a | 700 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
701 | } |
702 | ||
9e6e0a12 SW |
703 | |
704 | /** | |
705 | * gfs2_write_inode - Make sure the inode is stable on the disk | |
706 | * @inode: The inode | |
707 | * @sync: synchronous write flag | |
708 | * | |
709 | * Returns: errno | |
710 | */ | |
711 | ||
a9185b41 | 712 | static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) |
9e6e0a12 SW |
713 | { |
714 | struct gfs2_inode *ip = GFS2_I(inode); | |
715 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
716 | struct gfs2_holder gh; | |
717 | struct buffer_head *bh; | |
718 | struct timespec atime; | |
719 | struct gfs2_dinode *di; | |
720 | int ret = 0; | |
721 | ||
722 | /* Check this is a "normal" inode, etc */ | |
009d8518 | 723 | if (current->flags & PF_MEMALLOC) |
9e6e0a12 SW |
724 | return 0; |
725 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
726 | if (ret) | |
727 | goto do_flush; | |
728 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
729 | if (ret) | |
730 | goto do_unlock; | |
731 | ret = gfs2_meta_inode_buffer(ip, &bh); | |
732 | if (ret == 0) { | |
733 | di = (struct gfs2_dinode *)bh->b_data; | |
734 | atime.tv_sec = be64_to_cpu(di->di_atime); | |
735 | atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); | |
736 | if (timespec_compare(&inode->i_atime, &atime) > 0) { | |
737 | gfs2_trans_add_bh(ip->i_gl, bh, 1); | |
738 | gfs2_dinode_out(ip, bh->b_data); | |
739 | } | |
740 | brelse(bh); | |
741 | } | |
742 | gfs2_trans_end(sdp); | |
743 | do_unlock: | |
744 | gfs2_glock_dq_uninit(&gh); | |
745 | do_flush: | |
a9185b41 | 746 | if (wbc->sync_mode == WB_SYNC_ALL) |
9e6e0a12 SW |
747 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl); |
748 | return ret; | |
749 | } | |
750 | ||
751 | /** | |
752 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
753 | * @sdp: the filesystem | |
754 | * | |
755 | * Returns: errno | |
756 | */ | |
757 | ||
758 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
759 | { | |
760 | struct gfs2_holder t_gh; | |
761 | int error; | |
762 | ||
b94a170e | 763 | flush_workqueue(gfs2_delete_workqueue); |
5fb324ad | 764 | gfs2_quota_sync(sdp->sd_vfs, 0, 1); |
8c42d637 | 765 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
9e6e0a12 SW |
766 | |
767 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, | |
768 | &t_gh); | |
769 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
770 | return error; | |
771 | ||
772 | gfs2_meta_syncfs(sdp); | |
773 | gfs2_log_shutdown(sdp); | |
774 | ||
775 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
776 | ||
777 | if (t_gh.gh_gl) | |
778 | gfs2_glock_dq_uninit(&t_gh); | |
779 | ||
780 | gfs2_quota_cleanup(sdp); | |
781 | ||
782 | return error; | |
783 | } | |
784 | ||
785 | static int gfs2_umount_recovery_wait(void *word) | |
786 | { | |
787 | schedule(); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | /** | |
792 | * gfs2_put_super - Unmount the filesystem | |
793 | * @sb: The VFS superblock | |
794 | * | |
795 | */ | |
796 | ||
797 | static void gfs2_put_super(struct super_block *sb) | |
798 | { | |
799 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
800 | int error; | |
801 | struct gfs2_jdesc *jd; | |
802 | ||
803 | /* Unfreeze the filesystem, if we need to */ | |
804 | ||
805 | mutex_lock(&sdp->sd_freeze_lock); | |
806 | if (sdp->sd_freeze_count) | |
807 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
808 | mutex_unlock(&sdp->sd_freeze_lock); | |
809 | ||
810 | /* No more recovery requests */ | |
811 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); | |
812 | smp_mb(); | |
813 | ||
814 | /* Wait on outstanding recovery */ | |
815 | restart: | |
816 | spin_lock(&sdp->sd_jindex_spin); | |
817 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
818 | if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) | |
819 | continue; | |
820 | spin_unlock(&sdp->sd_jindex_spin); | |
821 | wait_on_bit(&jd->jd_flags, JDF_RECOVERY, | |
822 | gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); | |
823 | goto restart; | |
824 | } | |
825 | spin_unlock(&sdp->sd_jindex_spin); | |
826 | ||
827 | kthread_stop(sdp->sd_quotad_process); | |
828 | kthread_stop(sdp->sd_logd_process); | |
829 | ||
830 | if (!(sb->s_flags & MS_RDONLY)) { | |
831 | error = gfs2_make_fs_ro(sdp); | |
832 | if (error) | |
833 | gfs2_io_error(sdp); | |
834 | } | |
835 | /* At this point, we're through modifying the disk */ | |
836 | ||
837 | /* Release stuff */ | |
838 | ||
839 | iput(sdp->sd_jindex); | |
9e6e0a12 SW |
840 | iput(sdp->sd_statfs_inode); |
841 | iput(sdp->sd_rindex); | |
842 | iput(sdp->sd_quota_inode); | |
843 | ||
844 | gfs2_glock_put(sdp->sd_rename_gl); | |
845 | gfs2_glock_put(sdp->sd_trans_gl); | |
846 | ||
847 | if (!sdp->sd_args.ar_spectator) { | |
848 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
849 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
9e6e0a12 SW |
850 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
851 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | |
9e6e0a12 SW |
852 | iput(sdp->sd_sc_inode); |
853 | iput(sdp->sd_qc_inode); | |
854 | } | |
855 | ||
856 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | |
857 | gfs2_clear_rgrpd(sdp); | |
858 | gfs2_jindex_free(sdp); | |
859 | /* Take apart glock structures and buffer lists */ | |
860 | gfs2_gl_hash_clear(sdp); | |
861 | /* Unmount the locking protocol */ | |
862 | gfs2_lm_unmount(sdp); | |
863 | ||
864 | /* At this point, we're through participating in the lockspace */ | |
865 | gfs2_sys_fs_del(sdp); | |
866 | } | |
867 | ||
9e6e0a12 SW |
868 | /** |
869 | * gfs2_sync_fs - sync the filesystem | |
870 | * @sb: the superblock | |
871 | * | |
872 | * Flushes the log to disk. | |
873 | */ | |
874 | ||
875 | static int gfs2_sync_fs(struct super_block *sb, int wait) | |
876 | { | |
9e6e0a12 SW |
877 | if (wait && sb->s_fs_info) |
878 | gfs2_log_flush(sb->s_fs_info, NULL); | |
879 | return 0; | |
880 | } | |
881 | ||
882 | /** | |
883 | * gfs2_freeze - prevent further writes to the filesystem | |
884 | * @sb: the VFS structure for the filesystem | |
885 | * | |
886 | */ | |
887 | ||
888 | static int gfs2_freeze(struct super_block *sb) | |
889 | { | |
890 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
891 | int error; | |
892 | ||
893 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
894 | return -EINVAL; | |
895 | ||
896 | for (;;) { | |
897 | error = gfs2_freeze_fs(sdp); | |
898 | if (!error) | |
899 | break; | |
900 | ||
901 | switch (error) { | |
902 | case -EBUSY: | |
903 | fs_err(sdp, "waiting for recovery before freeze\n"); | |
904 | break; | |
905 | ||
906 | default: | |
907 | fs_err(sdp, "error freezing FS: %d\n", error); | |
908 | break; | |
909 | } | |
910 | ||
911 | fs_err(sdp, "retrying...\n"); | |
912 | msleep(1000); | |
913 | } | |
914 | return 0; | |
915 | } | |
916 | ||
917 | /** | |
918 | * gfs2_unfreeze - reallow writes to the filesystem | |
919 | * @sb: the VFS structure for the filesystem | |
920 | * | |
921 | */ | |
922 | ||
923 | static int gfs2_unfreeze(struct super_block *sb) | |
924 | { | |
925 | gfs2_unfreeze_fs(sb->s_fs_info); | |
926 | return 0; | |
927 | } | |
928 | ||
929 | /** | |
930 | * statfs_fill - fill in the sg for a given RG | |
931 | * @rgd: the RG | |
932 | * @sc: the sc structure | |
933 | * | |
934 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
935 | */ | |
936 | ||
937 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
938 | struct gfs2_statfs_change_host *sc) | |
939 | { | |
940 | gfs2_rgrp_verify(rgd); | |
941 | sc->sc_total += rgd->rd_data; | |
942 | sc->sc_free += rgd->rd_free; | |
943 | sc->sc_dinodes += rgd->rd_dinodes; | |
944 | return 0; | |
945 | } | |
946 | ||
947 | /** | |
948 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
949 | * @sdp: the filesystem | |
950 | * @sc: the sc info that will be returned | |
951 | * | |
952 | * Any error (other than a signal) will cause this routine to fall back | |
953 | * to the synchronous version. | |
954 | * | |
955 | * FIXME: This really shouldn't busy wait like this. | |
956 | * | |
957 | * Returns: errno | |
958 | */ | |
959 | ||
960 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
961 | { | |
962 | struct gfs2_holder ri_gh; | |
963 | struct gfs2_rgrpd *rgd_next; | |
964 | struct gfs2_holder *gha, *gh; | |
965 | unsigned int slots = 64; | |
966 | unsigned int x; | |
967 | int done; | |
968 | int error = 0, err; | |
969 | ||
970 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
971 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
972 | if (!gha) | |
973 | return -ENOMEM; | |
974 | ||
975 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
976 | if (error) | |
977 | goto out; | |
978 | ||
979 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
980 | ||
981 | for (;;) { | |
982 | done = 1; | |
983 | ||
984 | for (x = 0; x < slots; x++) { | |
985 | gh = gha + x; | |
986 | ||
987 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
988 | err = gfs2_glock_wait(gh); | |
989 | if (err) { | |
990 | gfs2_holder_uninit(gh); | |
991 | error = err; | |
992 | } else { | |
993 | if (!error) | |
994 | error = statfs_slow_fill( | |
995 | gh->gh_gl->gl_object, sc); | |
996 | gfs2_glock_dq_uninit(gh); | |
997 | } | |
998 | } | |
999 | ||
1000 | if (gh->gh_gl) | |
1001 | done = 0; | |
1002 | else if (rgd_next && !error) { | |
1003 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
1004 | LM_ST_SHARED, | |
1005 | GL_ASYNC, | |
1006 | gh); | |
1007 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
1008 | done = 0; | |
1009 | } | |
1010 | ||
1011 | if (signal_pending(current)) | |
1012 | error = -ERESTARTSYS; | |
1013 | } | |
1014 | ||
1015 | if (done) | |
1016 | break; | |
1017 | ||
1018 | yield(); | |
1019 | } | |
1020 | ||
1021 | gfs2_glock_dq_uninit(&ri_gh); | |
1022 | ||
1023 | out: | |
1024 | kfree(gha); | |
1025 | return error; | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * gfs2_statfs_i - Do a statfs | |
1030 | * @sdp: the filesystem | |
1031 | * @sg: the sg structure | |
1032 | * | |
1033 | * Returns: errno | |
1034 | */ | |
1035 | ||
1036 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1037 | { | |
1038 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
1039 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
1040 | ||
1041 | spin_lock(&sdp->sd_statfs_spin); | |
1042 | ||
1043 | *sc = *m_sc; | |
1044 | sc->sc_total += l_sc->sc_total; | |
1045 | sc->sc_free += l_sc->sc_free; | |
1046 | sc->sc_dinodes += l_sc->sc_dinodes; | |
1047 | ||
1048 | spin_unlock(&sdp->sd_statfs_spin); | |
1049 | ||
1050 | if (sc->sc_free < 0) | |
1051 | sc->sc_free = 0; | |
1052 | if (sc->sc_free > sc->sc_total) | |
1053 | sc->sc_free = sc->sc_total; | |
1054 | if (sc->sc_dinodes < 0) | |
1055 | sc->sc_dinodes = 0; | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * gfs2_statfs - Gather and return stats about the filesystem | |
1062 | * @sb: The superblock | |
1063 | * @statfsbuf: The buffer | |
1064 | * | |
1065 | * Returns: 0 on success or error code | |
1066 | */ | |
1067 | ||
1068 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | |
1069 | { | |
1070 | struct super_block *sb = dentry->d_inode->i_sb; | |
1071 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1072 | struct gfs2_statfs_change_host sc; | |
1073 | int error; | |
1074 | ||
1075 | if (gfs2_tune_get(sdp, gt_statfs_slow)) | |
1076 | error = gfs2_statfs_slow(sdp, &sc); | |
1077 | else | |
1078 | error = gfs2_statfs_i(sdp, &sc); | |
1079 | ||
1080 | if (error) | |
1081 | return error; | |
1082 | ||
1083 | buf->f_type = GFS2_MAGIC; | |
1084 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
1085 | buf->f_blocks = sc.sc_total; | |
1086 | buf->f_bfree = sc.sc_free; | |
1087 | buf->f_bavail = sc.sc_free; | |
1088 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
1089 | buf->f_ffree = sc.sc_free; | |
1090 | buf->f_namelen = GFS2_FNAMESIZE; | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | /** | |
1096 | * gfs2_remount_fs - called when the FS is remounted | |
1097 | * @sb: the filesystem | |
1098 | * @flags: the remount flags | |
1099 | * @data: extra data passed in (not used right now) | |
1100 | * | |
1101 | * Returns: errno | |
1102 | */ | |
1103 | ||
1104 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
1105 | { | |
1106 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1107 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | |
1108 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1109 | int error; | |
1110 | ||
1111 | spin_lock(>->gt_spin); | |
5e687eac | 1112 | args.ar_commit = gt->gt_logd_secs; |
3d3c10f2 BM |
1113 | args.ar_quota_quantum = gt->gt_quota_quantum; |
1114 | if (gt->gt_statfs_slow) | |
1115 | args.ar_statfs_quantum = 0; | |
1116 | else | |
1117 | args.ar_statfs_quantum = gt->gt_statfs_quantum; | |
9e6e0a12 | 1118 | spin_unlock(>->gt_spin); |
f55073ff | 1119 | error = gfs2_mount_args(&args, data); |
9e6e0a12 SW |
1120 | if (error) |
1121 | return error; | |
1122 | ||
1123 | /* Not allowed to change locking details */ | |
1124 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | |
1125 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | |
1126 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | /* Some flags must not be changed */ | |
1130 | if (args_neq(&args, &sdp->sd_args, spectator) || | |
9e6e0a12 | 1131 | args_neq(&args, &sdp->sd_args, localflocks) || |
9e6e0a12 SW |
1132 | args_neq(&args, &sdp->sd_args, meta)) |
1133 | return -EINVAL; | |
1134 | ||
1135 | if (sdp->sd_args.ar_spectator) | |
1136 | *flags |= MS_RDONLY; | |
1137 | ||
1138 | if ((sb->s_flags ^ *flags) & MS_RDONLY) { | |
1139 | if (*flags & MS_RDONLY) | |
1140 | error = gfs2_make_fs_ro(sdp); | |
1141 | else | |
1142 | error = gfs2_make_fs_rw(sdp); | |
1143 | if (error) | |
1144 | return error; | |
1145 | } | |
1146 | ||
1147 | sdp->sd_args = args; | |
1148 | if (sdp->sd_args.ar_posix_acl) | |
1149 | sb->s_flags |= MS_POSIXACL; | |
1150 | else | |
1151 | sb->s_flags &= ~MS_POSIXACL; | |
f25934c5 CH |
1152 | if (sdp->sd_args.ar_nobarrier) |
1153 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
1154 | else | |
1155 | clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
9e6e0a12 | 1156 | spin_lock(>->gt_spin); |
5e687eac | 1157 | gt->gt_logd_secs = args.ar_commit; |
3d3c10f2 BM |
1158 | gt->gt_quota_quantum = args.ar_quota_quantum; |
1159 | if (args.ar_statfs_quantum) { | |
1160 | gt->gt_statfs_slow = 0; | |
1161 | gt->gt_statfs_quantum = args.ar_statfs_quantum; | |
1162 | } | |
1163 | else { | |
1164 | gt->gt_statfs_slow = 1; | |
1165 | gt->gt_statfs_quantum = 30; | |
1166 | } | |
9e6e0a12 SW |
1167 | spin_unlock(>->gt_spin); |
1168 | ||
8633ecfa | 1169 | gfs2_online_uevent(sdp); |
9e6e0a12 SW |
1170 | return 0; |
1171 | } | |
1172 | ||
1173 | /** | |
1174 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
1175 | * @inode: The inode to drop | |
1176 | * | |
1177 | * If we've received a callback on an iopen lock then its because a | |
1178 | * remote node tried to deallocate the inode but failed due to this node | |
1179 | * still having the inode open. Here we mark the link count zero | |
1180 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
1181 | * is set on the iopen glock. If we didn't do a disk read since the | |
1182 | * remote node removed the final link then we might otherwise miss | |
1183 | * this event. This check ensures that this node will deallocate the | |
1184 | * inode's blocks, or alternatively pass the baton on to another | |
1185 | * node for later deallocation. | |
1186 | */ | |
1187 | ||
45321ac5 | 1188 | static int gfs2_drop_inode(struct inode *inode) |
9e6e0a12 SW |
1189 | { |
1190 | struct gfs2_inode *ip = GFS2_I(inode); | |
1191 | ||
009d8518 | 1192 | if (inode->i_nlink) { |
9e6e0a12 SW |
1193 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
1194 | if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) | |
1195 | clear_nlink(inode); | |
1196 | } | |
45321ac5 | 1197 | return generic_drop_inode(inode); |
9e6e0a12 SW |
1198 | } |
1199 | ||
1200 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | |
1201 | { | |
1202 | do { | |
1203 | if (d1 == d2) | |
1204 | return 1; | |
1205 | d1 = d1->d_parent; | |
1206 | } while (!IS_ROOT(d1)); | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /** | |
1211 | * gfs2_show_options - Show mount options for /proc/mounts | |
1212 | * @s: seq_file structure | |
1213 | * @mnt: vfsmount | |
1214 | * | |
1215 | * Returns: 0 on success or error code | |
1216 | */ | |
1217 | ||
1218 | static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) | |
1219 | { | |
1220 | struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; | |
1221 | struct gfs2_args *args = &sdp->sd_args; | |
3d3c10f2 | 1222 | int val; |
9e6e0a12 SW |
1223 | |
1224 | if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) | |
1225 | seq_printf(s, ",meta"); | |
1226 | if (args->ar_lockproto[0]) | |
1227 | seq_printf(s, ",lockproto=%s", args->ar_lockproto); | |
1228 | if (args->ar_locktable[0]) | |
1229 | seq_printf(s, ",locktable=%s", args->ar_locktable); | |
1230 | if (args->ar_hostdata[0]) | |
1231 | seq_printf(s, ",hostdata=%s", args->ar_hostdata); | |
1232 | if (args->ar_spectator) | |
1233 | seq_printf(s, ",spectator"); | |
9e6e0a12 SW |
1234 | if (args->ar_localflocks) |
1235 | seq_printf(s, ",localflocks"); | |
9e6e0a12 SW |
1236 | if (args->ar_debug) |
1237 | seq_printf(s, ",debug"); | |
9e6e0a12 SW |
1238 | if (args->ar_posix_acl) |
1239 | seq_printf(s, ",acl"); | |
1240 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { | |
1241 | char *state; | |
1242 | switch (args->ar_quota) { | |
1243 | case GFS2_QUOTA_OFF: | |
1244 | state = "off"; | |
1245 | break; | |
1246 | case GFS2_QUOTA_ACCOUNT: | |
1247 | state = "account"; | |
1248 | break; | |
1249 | case GFS2_QUOTA_ON: | |
1250 | state = "on"; | |
1251 | break; | |
1252 | default: | |
1253 | state = "unknown"; | |
1254 | break; | |
1255 | } | |
1256 | seq_printf(s, ",quota=%s", state); | |
1257 | } | |
1258 | if (args->ar_suiddir) | |
1259 | seq_printf(s, ",suiddir"); | |
1260 | if (args->ar_data != GFS2_DATA_DEFAULT) { | |
1261 | char *state; | |
1262 | switch (args->ar_data) { | |
1263 | case GFS2_DATA_WRITEBACK: | |
1264 | state = "writeback"; | |
1265 | break; | |
1266 | case GFS2_DATA_ORDERED: | |
1267 | state = "ordered"; | |
1268 | break; | |
1269 | default: | |
1270 | state = "unknown"; | |
1271 | break; | |
1272 | } | |
1273 | seq_printf(s, ",data=%s", state); | |
1274 | } | |
1275 | if (args->ar_discard) | |
1276 | seq_printf(s, ",discard"); | |
5e687eac BM |
1277 | val = sdp->sd_tune.gt_logd_secs; |
1278 | if (val != 30) | |
3d3c10f2 BM |
1279 | seq_printf(s, ",commit=%d", val); |
1280 | val = sdp->sd_tune.gt_statfs_quantum; | |
1281 | if (val != 30) | |
1282 | seq_printf(s, ",statfs_quantum=%d", val); | |
1283 | val = sdp->sd_tune.gt_quota_quantum; | |
1284 | if (val != 60) | |
1285 | seq_printf(s, ",quota_quantum=%d", val); | |
1286 | if (args->ar_statfs_percent) | |
1287 | seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); | |
d34843d0 BP |
1288 | if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
1289 | const char *state; | |
1290 | ||
1291 | switch (args->ar_errors) { | |
1292 | case GFS2_ERRORS_WITHDRAW: | |
1293 | state = "withdraw"; | |
1294 | break; | |
1295 | case GFS2_ERRORS_PANIC: | |
1296 | state = "panic"; | |
1297 | break; | |
1298 | default: | |
1299 | state = "unknown"; | |
1300 | break; | |
1301 | } | |
1302 | seq_printf(s, ",errors=%s", state); | |
1303 | } | |
cdcfde62 SW |
1304 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) |
1305 | seq_printf(s, ",nobarrier"); | |
913a71d2 SW |
1306 | if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) |
1307 | seq_printf(s, ",demote_interface_used"); | |
9e6e0a12 SW |
1308 | return 0; |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * We have to (at the moment) hold the inodes main lock to cover | |
1313 | * the gap between unlocking the shared lock on the iopen lock and | |
1314 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
1315 | * conversion on the iopen lock, but we can change that later. This | |
1316 | * is safe, just less efficient. | |
1317 | */ | |
1318 | ||
d5c1515c | 1319 | static void gfs2_evict_inode(struct inode *inode) |
9e6e0a12 SW |
1320 | { |
1321 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; | |
1322 | struct gfs2_inode *ip = GFS2_I(inode); | |
1323 | struct gfs2_holder gh; | |
1324 | int error; | |
1325 | ||
d5c1515c AV |
1326 | if (inode->i_nlink) |
1327 | goto out; | |
1328 | ||
9e6e0a12 SW |
1329 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1330 | if (unlikely(error)) { | |
1331 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
1332 | goto out; | |
1333 | } | |
1334 | ||
acf7e244 SW |
1335 | error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); |
1336 | if (error) | |
1337 | goto out_truncate; | |
1338 | ||
9e6e0a12 SW |
1339 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
1340 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); | |
1341 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
1342 | if (error) | |
1343 | goto out_truncate; | |
1344 | ||
1345 | if (S_ISDIR(inode->i_mode) && | |
1346 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | |
1347 | error = gfs2_dir_exhash_dealloc(ip); | |
1348 | if (error) | |
1349 | goto out_unlock; | |
1350 | } | |
1351 | ||
1352 | if (ip->i_eattr) { | |
1353 | error = gfs2_ea_dealloc(ip); | |
1354 | if (error) | |
1355 | goto out_unlock; | |
1356 | } | |
1357 | ||
1358 | if (!gfs2_is_stuffed(ip)) { | |
1359 | error = gfs2_file_dealloc(ip); | |
1360 | if (error) | |
1361 | goto out_unlock; | |
1362 | } | |
1363 | ||
1364 | error = gfs2_dinode_dealloc(ip); | |
1365 | if (error) | |
1366 | goto out_unlock; | |
1367 | ||
1368 | out_truncate: | |
1369 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); | |
1370 | if (error) | |
1371 | goto out_unlock; | |
1372 | /* Needs to be done before glock release & also in a transaction */ | |
1373 | truncate_inode_pages(&inode->i_data, 0); | |
1374 | gfs2_trans_end(sdp); | |
1375 | ||
1376 | out_unlock: | |
1377 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) | |
1378 | gfs2_glock_dq(&ip->i_iopen_gh); | |
1379 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
1380 | gfs2_glock_dq_uninit(&gh); | |
1381 | if (error && error != GLR_TRYFAILED && error != -EROFS) | |
d5c1515c | 1382 | fs_warn(sdp, "gfs2_evict_inode: %d\n", error); |
9e6e0a12 SW |
1383 | out: |
1384 | truncate_inode_pages(&inode->i_data, 0); | |
d5c1515c AV |
1385 | end_writeback(inode); |
1386 | ||
1387 | ip->i_gl->gl_object = NULL; | |
1388 | gfs2_glock_put(ip->i_gl); | |
1389 | ip->i_gl = NULL; | |
1390 | if (ip->i_iopen_gh.gh_gl) { | |
1391 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
1392 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
1393 | } | |
9e6e0a12 SW |
1394 | } |
1395 | ||
1396 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | |
1397 | { | |
1398 | struct gfs2_inode *ip; | |
1399 | ||
1400 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
1401 | if (ip) { | |
1402 | ip->i_flags = 0; | |
1403 | ip->i_gl = NULL; | |
1404 | } | |
1405 | return &ip->i_inode; | |
1406 | } | |
1407 | ||
fa0d7e3d | 1408 | static void gfs2_i_callback(struct rcu_head *head) |
9e6e0a12 | 1409 | { |
fa0d7e3d NP |
1410 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1411 | INIT_LIST_HEAD(&inode->i_dentry); | |
9e6e0a12 SW |
1412 | kmem_cache_free(gfs2_inode_cachep, inode); |
1413 | } | |
1414 | ||
fa0d7e3d NP |
1415 | static void gfs2_destroy_inode(struct inode *inode) |
1416 | { | |
1417 | call_rcu(&inode->i_rcu, gfs2_i_callback); | |
1418 | } | |
1419 | ||
9e6e0a12 SW |
1420 | const struct super_operations gfs2_super_ops = { |
1421 | .alloc_inode = gfs2_alloc_inode, | |
1422 | .destroy_inode = gfs2_destroy_inode, | |
1423 | .write_inode = gfs2_write_inode, | |
d5c1515c | 1424 | .evict_inode = gfs2_evict_inode, |
9e6e0a12 | 1425 | .put_super = gfs2_put_super, |
9e6e0a12 SW |
1426 | .sync_fs = gfs2_sync_fs, |
1427 | .freeze_fs = gfs2_freeze, | |
1428 | .unfreeze_fs = gfs2_unfreeze, | |
1429 | .statfs = gfs2_statfs, | |
1430 | .remount_fs = gfs2_remount_fs, | |
9e6e0a12 SW |
1431 | .drop_inode = gfs2_drop_inode, |
1432 | .show_options = gfs2_show_options, | |
1433 | }; | |
1434 |