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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. | |
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> | |
b3b94faa DT |
24 | |
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
b3b94faa DT |
27 | #include "bmap.h" |
28 | #include "dir.h" | |
b3b94faa DT |
29 | #include "glock.h" |
30 | #include "glops.h" | |
31 | #include "inode.h" | |
32 | #include "log.h" | |
33 | #include "meta_io.h" | |
34 | #include "quota.h" | |
35 | #include "recovery.h" | |
36 | #include "rgrp.h" | |
37 | #include "super.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
9e6e0a12 | 40 | #include "sys.h" |
307cf6e6 | 41 | #include "xattr.h" |
9e6e0a12 SW |
42 | |
43 | #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) | |
44 | ||
45 | enum { | |
46 | Opt_lockproto, | |
47 | Opt_locktable, | |
48 | Opt_hostdata, | |
49 | Opt_spectator, | |
50 | Opt_ignore_local_fs, | |
51 | Opt_localflocks, | |
52 | Opt_localcaching, | |
53 | Opt_debug, | |
54 | Opt_nodebug, | |
55 | Opt_upgrade, | |
56 | Opt_acl, | |
57 | Opt_noacl, | |
58 | Opt_quota_off, | |
59 | Opt_quota_account, | |
60 | Opt_quota_on, | |
61 | Opt_quota, | |
62 | Opt_noquota, | |
63 | Opt_suiddir, | |
64 | Opt_nosuiddir, | |
65 | Opt_data_writeback, | |
66 | Opt_data_ordered, | |
67 | Opt_meta, | |
68 | Opt_discard, | |
69 | Opt_nodiscard, | |
70 | Opt_commit, | |
d34843d0 BP |
71 | Opt_err_withdraw, |
72 | Opt_err_panic, | |
3d3c10f2 BM |
73 | Opt_statfs_quantum, |
74 | Opt_statfs_percent, | |
75 | Opt_quota_quantum, | |
9e6e0a12 SW |
76 | Opt_error, |
77 | }; | |
78 | ||
79 | static const match_table_t tokens = { | |
80 | {Opt_lockproto, "lockproto=%s"}, | |
81 | {Opt_locktable, "locktable=%s"}, | |
82 | {Opt_hostdata, "hostdata=%s"}, | |
83 | {Opt_spectator, "spectator"}, | |
84 | {Opt_ignore_local_fs, "ignore_local_fs"}, | |
85 | {Opt_localflocks, "localflocks"}, | |
86 | {Opt_localcaching, "localcaching"}, | |
87 | {Opt_debug, "debug"}, | |
88 | {Opt_nodebug, "nodebug"}, | |
89 | {Opt_upgrade, "upgrade"}, | |
90 | {Opt_acl, "acl"}, | |
91 | {Opt_noacl, "noacl"}, | |
92 | {Opt_quota_off, "quota=off"}, | |
93 | {Opt_quota_account, "quota=account"}, | |
94 | {Opt_quota_on, "quota=on"}, | |
95 | {Opt_quota, "quota"}, | |
96 | {Opt_noquota, "noquota"}, | |
97 | {Opt_suiddir, "suiddir"}, | |
98 | {Opt_nosuiddir, "nosuiddir"}, | |
99 | {Opt_data_writeback, "data=writeback"}, | |
100 | {Opt_data_ordered, "data=ordered"}, | |
101 | {Opt_meta, "meta"}, | |
102 | {Opt_discard, "discard"}, | |
103 | {Opt_nodiscard, "nodiscard"}, | |
104 | {Opt_commit, "commit=%d"}, | |
d34843d0 BP |
105 | {Opt_err_withdraw, "errors=withdraw"}, |
106 | {Opt_err_panic, "errors=panic"}, | |
3d3c10f2 BM |
107 | {Opt_statfs_quantum, "statfs_quantum=%d"}, |
108 | {Opt_statfs_percent, "statfs_percent=%d"}, | |
109 | {Opt_quota_quantum, "quota_quantum=%d"}, | |
9e6e0a12 SW |
110 | {Opt_error, NULL} |
111 | }; | |
112 | ||
113 | /** | |
114 | * gfs2_mount_args - Parse mount options | |
f55073ff SW |
115 | * @args: The structure into which the parsed options will be written |
116 | * @options: The options to parse | |
9e6e0a12 SW |
117 | * |
118 | * Return: errno | |
119 | */ | |
120 | ||
f55073ff | 121 | int gfs2_mount_args(struct gfs2_args *args, char *options) |
9e6e0a12 SW |
122 | { |
123 | char *o; | |
124 | int token; | |
125 | substring_t tmp[MAX_OPT_ARGS]; | |
126 | int rv; | |
127 | ||
128 | /* Split the options into tokens with the "," character and | |
129 | process them */ | |
130 | ||
131 | while (1) { | |
132 | o = strsep(&options, ","); | |
133 | if (o == NULL) | |
134 | break; | |
135 | if (*o == '\0') | |
136 | continue; | |
137 | ||
138 | token = match_token(o, tokens, tmp); | |
139 | switch (token) { | |
140 | case Opt_lockproto: | |
141 | match_strlcpy(args->ar_lockproto, &tmp[0], | |
142 | GFS2_LOCKNAME_LEN); | |
143 | break; | |
144 | case Opt_locktable: | |
145 | match_strlcpy(args->ar_locktable, &tmp[0], | |
146 | GFS2_LOCKNAME_LEN); | |
147 | break; | |
148 | case Opt_hostdata: | |
149 | match_strlcpy(args->ar_hostdata, &tmp[0], | |
150 | GFS2_LOCKNAME_LEN); | |
151 | break; | |
152 | case Opt_spectator: | |
153 | args->ar_spectator = 1; | |
154 | break; | |
155 | case Opt_ignore_local_fs: | |
156 | args->ar_ignore_local_fs = 1; | |
157 | break; | |
158 | case Opt_localflocks: | |
159 | args->ar_localflocks = 1; | |
160 | break; | |
161 | case Opt_localcaching: | |
162 | args->ar_localcaching = 1; | |
163 | break; | |
164 | case Opt_debug: | |
d34843d0 | 165 | if (args->ar_errors == GFS2_ERRORS_PANIC) { |
f55073ff | 166 | printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " |
d34843d0 BP |
167 | "are mutually exclusive.\n"); |
168 | return -EINVAL; | |
169 | } | |
9e6e0a12 SW |
170 | args->ar_debug = 1; |
171 | break; | |
172 | case Opt_nodebug: | |
173 | args->ar_debug = 0; | |
174 | break; | |
175 | case Opt_upgrade: | |
176 | args->ar_upgrade = 1; | |
177 | break; | |
178 | case Opt_acl: | |
179 | args->ar_posix_acl = 1; | |
180 | break; | |
181 | case Opt_noacl: | |
182 | args->ar_posix_acl = 0; | |
183 | break; | |
184 | case Opt_quota_off: | |
185 | case Opt_noquota: | |
186 | args->ar_quota = GFS2_QUOTA_OFF; | |
187 | break; | |
188 | case Opt_quota_account: | |
189 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
190 | break; | |
191 | case Opt_quota_on: | |
192 | case Opt_quota: | |
193 | args->ar_quota = GFS2_QUOTA_ON; | |
194 | break; | |
195 | case Opt_suiddir: | |
196 | args->ar_suiddir = 1; | |
197 | break; | |
198 | case Opt_nosuiddir: | |
199 | args->ar_suiddir = 0; | |
200 | break; | |
201 | case Opt_data_writeback: | |
202 | args->ar_data = GFS2_DATA_WRITEBACK; | |
203 | break; | |
204 | case Opt_data_ordered: | |
205 | args->ar_data = GFS2_DATA_ORDERED; | |
206 | break; | |
207 | case Opt_meta: | |
208 | args->ar_meta = 1; | |
209 | break; | |
210 | case Opt_discard: | |
211 | args->ar_discard = 1; | |
212 | break; | |
213 | case Opt_nodiscard: | |
214 | args->ar_discard = 0; | |
215 | break; | |
216 | case Opt_commit: | |
217 | rv = match_int(&tmp[0], &args->ar_commit); | |
218 | if (rv || args->ar_commit <= 0) { | |
f55073ff | 219 | printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); |
9e6e0a12 SW |
220 | return rv ? rv : -EINVAL; |
221 | } | |
222 | break; | |
3d3c10f2 BM |
223 | case Opt_statfs_quantum: |
224 | rv = match_int(&tmp[0], &args->ar_statfs_quantum); | |
225 | if (rv || args->ar_statfs_quantum < 0) { | |
226 | printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); | |
227 | return rv ? rv : -EINVAL; | |
228 | } | |
229 | break; | |
230 | case Opt_quota_quantum: | |
231 | rv = match_int(&tmp[0], &args->ar_quota_quantum); | |
232 | if (rv || args->ar_quota_quantum <= 0) { | |
233 | printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); | |
234 | return rv ? rv : -EINVAL; | |
235 | } | |
236 | break; | |
237 | case Opt_statfs_percent: | |
238 | rv = match_int(&tmp[0], &args->ar_statfs_percent); | |
239 | if (rv || args->ar_statfs_percent < 0 || | |
240 | args->ar_statfs_percent > 100) { | |
241 | printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); | |
242 | return rv ? rv : -EINVAL; | |
243 | } | |
244 | break; | |
d34843d0 BP |
245 | case Opt_err_withdraw: |
246 | args->ar_errors = GFS2_ERRORS_WITHDRAW; | |
247 | break; | |
248 | case Opt_err_panic: | |
249 | if (args->ar_debug) { | |
f55073ff | 250 | printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " |
d34843d0 BP |
251 | "are mutually exclusive.\n"); |
252 | return -EINVAL; | |
253 | } | |
254 | args->ar_errors = GFS2_ERRORS_PANIC; | |
255 | break; | |
9e6e0a12 SW |
256 | case Opt_error: |
257 | default: | |
f55073ff | 258 | printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); |
9e6e0a12 SW |
259 | return -EINVAL; |
260 | } | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
b3b94faa | 265 | |
fefc03bf SW |
266 | /** |
267 | * gfs2_jindex_free - Clear all the journal index information | |
268 | * @sdp: The GFS2 superblock | |
269 | * | |
270 | */ | |
271 | ||
272 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
273 | { | |
274 | struct list_head list, *head; | |
275 | struct gfs2_jdesc *jd; | |
276 | struct gfs2_journal_extent *jext; | |
277 | ||
278 | spin_lock(&sdp->sd_jindex_spin); | |
279 | list_add(&list, &sdp->sd_jindex_list); | |
280 | list_del_init(&sdp->sd_jindex_list); | |
281 | sdp->sd_journals = 0; | |
282 | spin_unlock(&sdp->sd_jindex_spin); | |
283 | ||
284 | while (!list_empty(&list)) { | |
285 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
286 | head = &jd->extent_list; | |
287 | while (!list_empty(head)) { | |
288 | jext = list_entry(head->next, | |
289 | struct gfs2_journal_extent, | |
290 | extent_list); | |
291 | list_del(&jext->extent_list); | |
292 | kfree(jext); | |
293 | } | |
294 | list_del(&jd->jd_list); | |
295 | iput(jd->jd_inode); | |
296 | kfree(jd); | |
297 | } | |
298 | } | |
299 | ||
b3b94faa DT |
300 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) |
301 | { | |
302 | struct gfs2_jdesc *jd; | |
303 | int found = 0; | |
304 | ||
305 | list_for_each_entry(jd, head, jd_list) { | |
306 | if (jd->jd_jid == jid) { | |
307 | found = 1; | |
308 | break; | |
309 | } | |
310 | } | |
311 | ||
312 | if (!found) | |
313 | jd = NULL; | |
314 | ||
315 | return jd; | |
316 | } | |
317 | ||
318 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
319 | { | |
320 | struct gfs2_jdesc *jd; | |
321 | ||
322 | spin_lock(&sdp->sd_jindex_spin); | |
323 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
324 | spin_unlock(&sdp->sd_jindex_spin); | |
325 | ||
326 | return jd; | |
327 | } | |
328 | ||
b3b94faa DT |
329 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) |
330 | { | |
feaa7bba SW |
331 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
332 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
333 | int ar; |
334 | int error; | |
335 | ||
c9e98886 SW |
336 | if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) || |
337 | (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) { | |
b3b94faa DT |
338 | gfs2_consist_inode(ip); |
339 | return -EIO; | |
340 | } | |
c9e98886 | 341 | jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; |
b3b94faa | 342 | |
c9e98886 | 343 | error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar); |
b3b94faa DT |
344 | if (!error && ar) { |
345 | gfs2_consist_inode(ip); | |
346 | error = -EIO; | |
347 | } | |
348 | ||
349 | return error; | |
350 | } | |
351 | ||
b3b94faa DT |
352 | /** |
353 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
354 | * @sdp: the filesystem | |
355 | * | |
356 | * Returns: errno | |
357 | */ | |
358 | ||
359 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
360 | { | |
feaa7bba | 361 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 362 | struct gfs2_glock *j_gl = ip->i_gl; |
b3b94faa | 363 | struct gfs2_holder t_gh; |
55167622 | 364 | struct gfs2_log_header_host head; |
b3b94faa DT |
365 | int error; |
366 | ||
1c0f4872 | 367 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); |
b3b94faa DT |
368 | if (error) |
369 | return error; | |
370 | ||
1a14d3a6 | 371 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
372 | |
373 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
374 | if (error) | |
375 | goto fail; | |
376 | ||
377 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
378 | gfs2_consist(sdp); | |
379 | error = -EIO; | |
380 | goto fail; | |
381 | } | |
382 | ||
383 | /* Initialize some head of the log stuff */ | |
384 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
385 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
386 | ||
b3b94faa DT |
387 | error = gfs2_quota_init(sdp); |
388 | if (error) | |
a91ea69f | 389 | goto fail; |
b3b94faa DT |
390 | |
391 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
392 | ||
393 | gfs2_glock_dq_uninit(&t_gh); | |
394 | ||
395 | return 0; | |
396 | ||
a91ea69f | 397 | fail: |
b3b94faa DT |
398 | t_gh.gh_flags |= GL_NOCACHE; |
399 | gfs2_glock_dq_uninit(&t_gh); | |
400 | ||
401 | return error; | |
402 | } | |
403 | ||
1946f70a | 404 | void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
bb8d8a6f SW |
405 | { |
406 | const struct gfs2_statfs_change *str = buf; | |
407 | ||
408 | sc->sc_total = be64_to_cpu(str->sc_total); | |
409 | sc->sc_free = be64_to_cpu(str->sc_free); | |
410 | sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); | |
411 | } | |
412 | ||
413 | static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) | |
414 | { | |
415 | struct gfs2_statfs_change *str = buf; | |
416 | ||
417 | str->sc_total = cpu_to_be64(sc->sc_total); | |
418 | str->sc_free = cpu_to_be64(sc->sc_free); | |
419 | str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); | |
420 | } | |
421 | ||
b3b94faa DT |
422 | int gfs2_statfs_init(struct gfs2_sbd *sdp) |
423 | { | |
feaa7bba | 424 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 425 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 426 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 427 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
428 | struct buffer_head *m_bh, *l_bh; |
429 | struct gfs2_holder gh; | |
430 | int error; | |
431 | ||
432 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
433 | &gh); | |
434 | if (error) | |
435 | return error; | |
436 | ||
437 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
438 | if (error) | |
439 | goto out; | |
440 | ||
441 | if (sdp->sd_args.ar_spectator) { | |
442 | spin_lock(&sdp->sd_statfs_spin); | |
443 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
444 | sizeof(struct gfs2_dinode)); | |
445 | spin_unlock(&sdp->sd_statfs_spin); | |
446 | } else { | |
447 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
448 | if (error) | |
449 | goto out_m_bh; | |
450 | ||
451 | spin_lock(&sdp->sd_statfs_spin); | |
452 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
453 | sizeof(struct gfs2_dinode)); | |
454 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
455 | sizeof(struct gfs2_dinode)); | |
456 | spin_unlock(&sdp->sd_statfs_spin); | |
457 | ||
458 | brelse(l_bh); | |
459 | } | |
460 | ||
a91ea69f | 461 | out_m_bh: |
b3b94faa | 462 | brelse(m_bh); |
a91ea69f | 463 | out: |
b3b94faa | 464 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
465 | return 0; |
466 | } | |
467 | ||
cd915493 SW |
468 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
469 | s64 dinodes) | |
b3b94faa | 470 | { |
feaa7bba | 471 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 472 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
3d3c10f2 | 473 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
b3b94faa | 474 | struct buffer_head *l_bh; |
c14f5735 BM |
475 | s64 x, y; |
476 | int need_sync = 0; | |
b3b94faa DT |
477 | int error; |
478 | ||
479 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
480 | if (error) | |
481 | return; | |
482 | ||
d4e9c4c3 | 483 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
b3b94faa DT |
484 | |
485 | spin_lock(&sdp->sd_statfs_spin); | |
486 | l_sc->sc_total += total; | |
487 | l_sc->sc_free += free; | |
488 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 489 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
c14f5735 BM |
490 | if (sdp->sd_args.ar_statfs_percent) { |
491 | x = 100 * l_sc->sc_free; | |
492 | y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; | |
493 | if (x >= y || x <= -y) | |
494 | need_sync = 1; | |
495 | } | |
b3b94faa DT |
496 | spin_unlock(&sdp->sd_statfs_spin); |
497 | ||
498 | brelse(l_bh); | |
c14f5735 | 499 | if (need_sync) |
3d3c10f2 | 500 | gfs2_wake_up_statfs(sdp); |
b3b94faa DT |
501 | } |
502 | ||
1946f70a BM |
503 | void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, |
504 | struct buffer_head *l_bh) | |
505 | { | |
506 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); | |
507 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
508 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
509 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
510 | ||
511 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); | |
512 | ||
513 | spin_lock(&sdp->sd_statfs_spin); | |
514 | m_sc->sc_total += l_sc->sc_total; | |
515 | m_sc->sc_free += l_sc->sc_free; | |
516 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
517 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
518 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
519 | 0, sizeof(struct gfs2_statfs_change)); | |
520 | spin_unlock(&sdp->sd_statfs_spin); | |
521 | ||
522 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); | |
523 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); | |
524 | } | |
525 | ||
8c42d637 | 526 | int gfs2_statfs_sync(struct super_block *sb, int type) |
b3b94faa | 527 | { |
8c42d637 | 528 | struct gfs2_sbd *sdp = sb->s_fs_info; |
feaa7bba SW |
529 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
530 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
531 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
532 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
533 | struct gfs2_holder gh; |
534 | struct buffer_head *m_bh, *l_bh; | |
535 | int error; | |
536 | ||
537 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
538 | &gh); | |
539 | if (error) | |
540 | return error; | |
541 | ||
542 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
543 | if (error) | |
544 | goto out; | |
545 | ||
546 | spin_lock(&sdp->sd_statfs_spin); | |
547 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 548 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
549 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
550 | spin_unlock(&sdp->sd_statfs_spin); | |
551 | goto out_bh; | |
552 | } | |
553 | spin_unlock(&sdp->sd_statfs_spin); | |
554 | ||
555 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
556 | if (error) | |
557 | goto out_bh; | |
558 | ||
559 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
560 | if (error) | |
561 | goto out_bh2; | |
562 | ||
1946f70a | 563 | update_statfs(sdp, m_bh, l_bh); |
3d3c10f2 | 564 | sdp->sd_statfs_force_sync = 0; |
b3b94faa DT |
565 | |
566 | gfs2_trans_end(sdp); | |
567 | ||
a91ea69f | 568 | out_bh2: |
b3b94faa | 569 | brelse(l_bh); |
a91ea69f | 570 | out_bh: |
b3b94faa | 571 | brelse(m_bh); |
a91ea69f | 572 | out: |
b3b94faa | 573 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
574 | return error; |
575 | } | |
576 | ||
b3b94faa DT |
577 | struct lfcc { |
578 | struct list_head list; | |
579 | struct gfs2_holder gh; | |
580 | }; | |
581 | ||
582 | /** | |
583 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
584 | * journals are clean | |
585 | * @sdp: the file system | |
586 | * @state: the state to put the transaction lock into | |
587 | * @t_gh: the hold on the transaction lock | |
588 | * | |
589 | * Returns: errno | |
590 | */ | |
591 | ||
08bc2dbc AB |
592 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
593 | struct gfs2_holder *t_gh) | |
b3b94faa | 594 | { |
5c676f6d | 595 | struct gfs2_inode *ip; |
b3b94faa DT |
596 | struct gfs2_jdesc *jd; |
597 | struct lfcc *lfcc; | |
598 | LIST_HEAD(list); | |
55167622 | 599 | struct gfs2_log_header_host lh; |
b3b94faa DT |
600 | int error; |
601 | ||
b3b94faa DT |
602 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
603 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
604 | if (!lfcc) { | |
605 | error = -ENOMEM; | |
606 | goto out; | |
607 | } | |
feaa7bba SW |
608 | ip = GFS2_I(jd->jd_inode); |
609 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
610 | if (error) { |
611 | kfree(lfcc); | |
612 | goto out; | |
613 | } | |
614 | list_add(&lfcc->list, &list); | |
615 | } | |
616 | ||
617 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, | |
6802e340 | 618 | GL_NOCACHE, t_gh); |
b3b94faa DT |
619 | |
620 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
621 | error = gfs2_jdesc_check(jd); | |
622 | if (error) | |
623 | break; | |
624 | error = gfs2_find_jhead(jd, &lh); | |
625 | if (error) | |
626 | break; | |
627 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
628 | error = -EBUSY; | |
629 | break; | |
630 | } | |
631 | } | |
632 | ||
633 | if (error) | |
634 | gfs2_glock_dq_uninit(t_gh); | |
635 | ||
a91ea69f | 636 | out: |
b3b94faa DT |
637 | while (!list_empty(&list)) { |
638 | lfcc = list_entry(list.next, struct lfcc, list); | |
639 | list_del(&lfcc->list); | |
640 | gfs2_glock_dq_uninit(&lfcc->gh); | |
641 | kfree(lfcc); | |
642 | } | |
b3b94faa DT |
643 | return error; |
644 | } | |
645 | ||
646 | /** | |
647 | * gfs2_freeze_fs - freezes the file system | |
648 | * @sdp: the file system | |
649 | * | |
650 | * This function flushes data and meta data for all machines by | |
651 | * aquiring the transaction log exclusively. All journals are | |
652 | * ensured to be in a clean state as well. | |
653 | * | |
654 | * Returns: errno | |
655 | */ | |
656 | ||
657 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
658 | { | |
659 | int error = 0; | |
660 | ||
f55ab26a | 661 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
662 | |
663 | if (!sdp->sd_freeze_count++) { | |
664 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
665 | if (error) | |
666 | sdp->sd_freeze_count--; | |
667 | } | |
668 | ||
f55ab26a | 669 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
670 | |
671 | return error; | |
672 | } | |
673 | ||
674 | /** | |
675 | * gfs2_unfreeze_fs - unfreezes the file system | |
676 | * @sdp: the file system | |
677 | * | |
678 | * This function allows the file system to proceed by unlocking | |
679 | * the exclusively held transaction lock. Other GFS2 nodes are | |
680 | * now free to acquire the lock shared and go on with their lives. | |
681 | * | |
682 | */ | |
683 | ||
684 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
685 | { | |
f55ab26a | 686 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
687 | |
688 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
689 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
690 | ||
f55ab26a | 691 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
692 | } |
693 | ||
9e6e0a12 SW |
694 | |
695 | /** | |
696 | * gfs2_write_inode - Make sure the inode is stable on the disk | |
697 | * @inode: The inode | |
698 | * @sync: synchronous write flag | |
699 | * | |
700 | * Returns: errno | |
701 | */ | |
702 | ||
703 | static int gfs2_write_inode(struct inode *inode, int sync) | |
704 | { | |
705 | struct gfs2_inode *ip = GFS2_I(inode); | |
706 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
707 | struct gfs2_holder gh; | |
708 | struct buffer_head *bh; | |
709 | struct timespec atime; | |
710 | struct gfs2_dinode *di; | |
711 | int ret = 0; | |
712 | ||
713 | /* Check this is a "normal" inode, etc */ | |
714 | if (!test_bit(GIF_USER, &ip->i_flags) || | |
715 | (current->flags & PF_MEMALLOC)) | |
716 | return 0; | |
717 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
718 | if (ret) | |
719 | goto do_flush; | |
720 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
721 | if (ret) | |
722 | goto do_unlock; | |
723 | ret = gfs2_meta_inode_buffer(ip, &bh); | |
724 | if (ret == 0) { | |
725 | di = (struct gfs2_dinode *)bh->b_data; | |
726 | atime.tv_sec = be64_to_cpu(di->di_atime); | |
727 | atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); | |
728 | if (timespec_compare(&inode->i_atime, &atime) > 0) { | |
729 | gfs2_trans_add_bh(ip->i_gl, bh, 1); | |
730 | gfs2_dinode_out(ip, bh->b_data); | |
731 | } | |
732 | brelse(bh); | |
733 | } | |
734 | gfs2_trans_end(sdp); | |
735 | do_unlock: | |
736 | gfs2_glock_dq_uninit(&gh); | |
737 | do_flush: | |
738 | if (sync != 0) | |
739 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl); | |
740 | return ret; | |
741 | } | |
742 | ||
743 | /** | |
744 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
745 | * @sdp: the filesystem | |
746 | * | |
747 | * Returns: errno | |
748 | */ | |
749 | ||
750 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
751 | { | |
752 | struct gfs2_holder t_gh; | |
753 | int error; | |
754 | ||
b94a170e | 755 | flush_workqueue(gfs2_delete_workqueue); |
8c42d637 SW |
756 | gfs2_quota_sync(sdp->sd_vfs, 0); |
757 | gfs2_statfs_sync(sdp->sd_vfs, 0); | |
9e6e0a12 SW |
758 | |
759 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, | |
760 | &t_gh); | |
761 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
762 | return error; | |
763 | ||
764 | gfs2_meta_syncfs(sdp); | |
765 | gfs2_log_shutdown(sdp); | |
766 | ||
767 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
768 | ||
769 | if (t_gh.gh_gl) | |
770 | gfs2_glock_dq_uninit(&t_gh); | |
771 | ||
772 | gfs2_quota_cleanup(sdp); | |
773 | ||
774 | return error; | |
775 | } | |
776 | ||
777 | static int gfs2_umount_recovery_wait(void *word) | |
778 | { | |
779 | schedule(); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | /** | |
784 | * gfs2_put_super - Unmount the filesystem | |
785 | * @sb: The VFS superblock | |
786 | * | |
787 | */ | |
788 | ||
789 | static void gfs2_put_super(struct super_block *sb) | |
790 | { | |
791 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
792 | int error; | |
793 | struct gfs2_jdesc *jd; | |
794 | ||
795 | /* Unfreeze the filesystem, if we need to */ | |
796 | ||
797 | mutex_lock(&sdp->sd_freeze_lock); | |
798 | if (sdp->sd_freeze_count) | |
799 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
800 | mutex_unlock(&sdp->sd_freeze_lock); | |
801 | ||
802 | /* No more recovery requests */ | |
803 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); | |
804 | smp_mb(); | |
805 | ||
806 | /* Wait on outstanding recovery */ | |
807 | restart: | |
808 | spin_lock(&sdp->sd_jindex_spin); | |
809 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
810 | if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) | |
811 | continue; | |
812 | spin_unlock(&sdp->sd_jindex_spin); | |
813 | wait_on_bit(&jd->jd_flags, JDF_RECOVERY, | |
814 | gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); | |
815 | goto restart; | |
816 | } | |
817 | spin_unlock(&sdp->sd_jindex_spin); | |
818 | ||
819 | kthread_stop(sdp->sd_quotad_process); | |
820 | kthread_stop(sdp->sd_logd_process); | |
821 | ||
822 | if (!(sb->s_flags & MS_RDONLY)) { | |
823 | error = gfs2_make_fs_ro(sdp); | |
824 | if (error) | |
825 | gfs2_io_error(sdp); | |
826 | } | |
827 | /* At this point, we're through modifying the disk */ | |
828 | ||
829 | /* Release stuff */ | |
830 | ||
831 | iput(sdp->sd_jindex); | |
9e6e0a12 SW |
832 | iput(sdp->sd_statfs_inode); |
833 | iput(sdp->sd_rindex); | |
834 | iput(sdp->sd_quota_inode); | |
835 | ||
836 | gfs2_glock_put(sdp->sd_rename_gl); | |
837 | gfs2_glock_put(sdp->sd_trans_gl); | |
838 | ||
839 | if (!sdp->sd_args.ar_spectator) { | |
840 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
841 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
9e6e0a12 SW |
842 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
843 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | |
9e6e0a12 SW |
844 | iput(sdp->sd_sc_inode); |
845 | iput(sdp->sd_qc_inode); | |
846 | } | |
847 | ||
848 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | |
849 | gfs2_clear_rgrpd(sdp); | |
850 | gfs2_jindex_free(sdp); | |
851 | /* Take apart glock structures and buffer lists */ | |
852 | gfs2_gl_hash_clear(sdp); | |
853 | /* Unmount the locking protocol */ | |
854 | gfs2_lm_unmount(sdp); | |
855 | ||
856 | /* At this point, we're through participating in the lockspace */ | |
857 | gfs2_sys_fs_del(sdp); | |
858 | } | |
859 | ||
9e6e0a12 SW |
860 | /** |
861 | * gfs2_sync_fs - sync the filesystem | |
862 | * @sb: the superblock | |
863 | * | |
864 | * Flushes the log to disk. | |
865 | */ | |
866 | ||
867 | static int gfs2_sync_fs(struct super_block *sb, int wait) | |
868 | { | |
9e6e0a12 SW |
869 | if (wait && sb->s_fs_info) |
870 | gfs2_log_flush(sb->s_fs_info, NULL); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | /** | |
875 | * gfs2_freeze - prevent further writes to the filesystem | |
876 | * @sb: the VFS structure for the filesystem | |
877 | * | |
878 | */ | |
879 | ||
880 | static int gfs2_freeze(struct super_block *sb) | |
881 | { | |
882 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
883 | int error; | |
884 | ||
885 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
886 | return -EINVAL; | |
887 | ||
888 | for (;;) { | |
889 | error = gfs2_freeze_fs(sdp); | |
890 | if (!error) | |
891 | break; | |
892 | ||
893 | switch (error) { | |
894 | case -EBUSY: | |
895 | fs_err(sdp, "waiting for recovery before freeze\n"); | |
896 | break; | |
897 | ||
898 | default: | |
899 | fs_err(sdp, "error freezing FS: %d\n", error); | |
900 | break; | |
901 | } | |
902 | ||
903 | fs_err(sdp, "retrying...\n"); | |
904 | msleep(1000); | |
905 | } | |
906 | return 0; | |
907 | } | |
908 | ||
909 | /** | |
910 | * gfs2_unfreeze - reallow writes to the filesystem | |
911 | * @sb: the VFS structure for the filesystem | |
912 | * | |
913 | */ | |
914 | ||
915 | static int gfs2_unfreeze(struct super_block *sb) | |
916 | { | |
917 | gfs2_unfreeze_fs(sb->s_fs_info); | |
918 | return 0; | |
919 | } | |
920 | ||
921 | /** | |
922 | * statfs_fill - fill in the sg for a given RG | |
923 | * @rgd: the RG | |
924 | * @sc: the sc structure | |
925 | * | |
926 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
927 | */ | |
928 | ||
929 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
930 | struct gfs2_statfs_change_host *sc) | |
931 | { | |
932 | gfs2_rgrp_verify(rgd); | |
933 | sc->sc_total += rgd->rd_data; | |
934 | sc->sc_free += rgd->rd_free; | |
935 | sc->sc_dinodes += rgd->rd_dinodes; | |
936 | return 0; | |
937 | } | |
938 | ||
939 | /** | |
940 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
941 | * @sdp: the filesystem | |
942 | * @sc: the sc info that will be returned | |
943 | * | |
944 | * Any error (other than a signal) will cause this routine to fall back | |
945 | * to the synchronous version. | |
946 | * | |
947 | * FIXME: This really shouldn't busy wait like this. | |
948 | * | |
949 | * Returns: errno | |
950 | */ | |
951 | ||
952 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
953 | { | |
954 | struct gfs2_holder ri_gh; | |
955 | struct gfs2_rgrpd *rgd_next; | |
956 | struct gfs2_holder *gha, *gh; | |
957 | unsigned int slots = 64; | |
958 | unsigned int x; | |
959 | int done; | |
960 | int error = 0, err; | |
961 | ||
962 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
963 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
964 | if (!gha) | |
965 | return -ENOMEM; | |
966 | ||
967 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
968 | if (error) | |
969 | goto out; | |
970 | ||
971 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
972 | ||
973 | for (;;) { | |
974 | done = 1; | |
975 | ||
976 | for (x = 0; x < slots; x++) { | |
977 | gh = gha + x; | |
978 | ||
979 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
980 | err = gfs2_glock_wait(gh); | |
981 | if (err) { | |
982 | gfs2_holder_uninit(gh); | |
983 | error = err; | |
984 | } else { | |
985 | if (!error) | |
986 | error = statfs_slow_fill( | |
987 | gh->gh_gl->gl_object, sc); | |
988 | gfs2_glock_dq_uninit(gh); | |
989 | } | |
990 | } | |
991 | ||
992 | if (gh->gh_gl) | |
993 | done = 0; | |
994 | else if (rgd_next && !error) { | |
995 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
996 | LM_ST_SHARED, | |
997 | GL_ASYNC, | |
998 | gh); | |
999 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
1000 | done = 0; | |
1001 | } | |
1002 | ||
1003 | if (signal_pending(current)) | |
1004 | error = -ERESTARTSYS; | |
1005 | } | |
1006 | ||
1007 | if (done) | |
1008 | break; | |
1009 | ||
1010 | yield(); | |
1011 | } | |
1012 | ||
1013 | gfs2_glock_dq_uninit(&ri_gh); | |
1014 | ||
1015 | out: | |
1016 | kfree(gha); | |
1017 | return error; | |
1018 | } | |
1019 | ||
1020 | /** | |
1021 | * gfs2_statfs_i - Do a statfs | |
1022 | * @sdp: the filesystem | |
1023 | * @sg: the sg structure | |
1024 | * | |
1025 | * Returns: errno | |
1026 | */ | |
1027 | ||
1028 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1029 | { | |
1030 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
1031 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
1032 | ||
1033 | spin_lock(&sdp->sd_statfs_spin); | |
1034 | ||
1035 | *sc = *m_sc; | |
1036 | sc->sc_total += l_sc->sc_total; | |
1037 | sc->sc_free += l_sc->sc_free; | |
1038 | sc->sc_dinodes += l_sc->sc_dinodes; | |
1039 | ||
1040 | spin_unlock(&sdp->sd_statfs_spin); | |
1041 | ||
1042 | if (sc->sc_free < 0) | |
1043 | sc->sc_free = 0; | |
1044 | if (sc->sc_free > sc->sc_total) | |
1045 | sc->sc_free = sc->sc_total; | |
1046 | if (sc->sc_dinodes < 0) | |
1047 | sc->sc_dinodes = 0; | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * gfs2_statfs - Gather and return stats about the filesystem | |
1054 | * @sb: The superblock | |
1055 | * @statfsbuf: The buffer | |
1056 | * | |
1057 | * Returns: 0 on success or error code | |
1058 | */ | |
1059 | ||
1060 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | |
1061 | { | |
1062 | struct super_block *sb = dentry->d_inode->i_sb; | |
1063 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1064 | struct gfs2_statfs_change_host sc; | |
1065 | int error; | |
1066 | ||
1067 | if (gfs2_tune_get(sdp, gt_statfs_slow)) | |
1068 | error = gfs2_statfs_slow(sdp, &sc); | |
1069 | else | |
1070 | error = gfs2_statfs_i(sdp, &sc); | |
1071 | ||
1072 | if (error) | |
1073 | return error; | |
1074 | ||
1075 | buf->f_type = GFS2_MAGIC; | |
1076 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
1077 | buf->f_blocks = sc.sc_total; | |
1078 | buf->f_bfree = sc.sc_free; | |
1079 | buf->f_bavail = sc.sc_free; | |
1080 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
1081 | buf->f_ffree = sc.sc_free; | |
1082 | buf->f_namelen = GFS2_FNAMESIZE; | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /** | |
1088 | * gfs2_remount_fs - called when the FS is remounted | |
1089 | * @sb: the filesystem | |
1090 | * @flags: the remount flags | |
1091 | * @data: extra data passed in (not used right now) | |
1092 | * | |
1093 | * Returns: errno | |
1094 | */ | |
1095 | ||
1096 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
1097 | { | |
1098 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1099 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | |
1100 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1101 | int error; | |
1102 | ||
1103 | spin_lock(>->gt_spin); | |
1104 | args.ar_commit = gt->gt_log_flush_secs; | |
3d3c10f2 BM |
1105 | args.ar_quota_quantum = gt->gt_quota_quantum; |
1106 | if (gt->gt_statfs_slow) | |
1107 | args.ar_statfs_quantum = 0; | |
1108 | else | |
1109 | args.ar_statfs_quantum = gt->gt_statfs_quantum; | |
9e6e0a12 | 1110 | spin_unlock(>->gt_spin); |
f55073ff | 1111 | error = gfs2_mount_args(&args, data); |
9e6e0a12 SW |
1112 | if (error) |
1113 | return error; | |
1114 | ||
1115 | /* Not allowed to change locking details */ | |
1116 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | |
1117 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | |
1118 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | |
1119 | return -EINVAL; | |
1120 | ||
1121 | /* Some flags must not be changed */ | |
1122 | if (args_neq(&args, &sdp->sd_args, spectator) || | |
1123 | args_neq(&args, &sdp->sd_args, ignore_local_fs) || | |
1124 | args_neq(&args, &sdp->sd_args, localflocks) || | |
1125 | args_neq(&args, &sdp->sd_args, localcaching) || | |
1126 | args_neq(&args, &sdp->sd_args, meta)) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | if (sdp->sd_args.ar_spectator) | |
1130 | *flags |= MS_RDONLY; | |
1131 | ||
1132 | if ((sb->s_flags ^ *flags) & MS_RDONLY) { | |
1133 | if (*flags & MS_RDONLY) | |
1134 | error = gfs2_make_fs_ro(sdp); | |
1135 | else | |
1136 | error = gfs2_make_fs_rw(sdp); | |
1137 | if (error) | |
1138 | return error; | |
1139 | } | |
1140 | ||
1141 | sdp->sd_args = args; | |
1142 | if (sdp->sd_args.ar_posix_acl) | |
1143 | sb->s_flags |= MS_POSIXACL; | |
1144 | else | |
1145 | sb->s_flags &= ~MS_POSIXACL; | |
1146 | spin_lock(>->gt_spin); | |
1147 | gt->gt_log_flush_secs = args.ar_commit; | |
3d3c10f2 BM |
1148 | gt->gt_quota_quantum = args.ar_quota_quantum; |
1149 | if (args.ar_statfs_quantum) { | |
1150 | gt->gt_statfs_slow = 0; | |
1151 | gt->gt_statfs_quantum = args.ar_statfs_quantum; | |
1152 | } | |
1153 | else { | |
1154 | gt->gt_statfs_slow = 1; | |
1155 | gt->gt_statfs_quantum = 30; | |
1156 | } | |
9e6e0a12 SW |
1157 | spin_unlock(>->gt_spin); |
1158 | ||
8633ecfa | 1159 | gfs2_online_uevent(sdp); |
9e6e0a12 SW |
1160 | return 0; |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
1165 | * @inode: The inode to drop | |
1166 | * | |
1167 | * If we've received a callback on an iopen lock then its because a | |
1168 | * remote node tried to deallocate the inode but failed due to this node | |
1169 | * still having the inode open. Here we mark the link count zero | |
1170 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
1171 | * is set on the iopen glock. If we didn't do a disk read since the | |
1172 | * remote node removed the final link then we might otherwise miss | |
1173 | * this event. This check ensures that this node will deallocate the | |
1174 | * inode's blocks, or alternatively pass the baton on to another | |
1175 | * node for later deallocation. | |
1176 | */ | |
1177 | ||
1178 | static void gfs2_drop_inode(struct inode *inode) | |
1179 | { | |
1180 | struct gfs2_inode *ip = GFS2_I(inode); | |
1181 | ||
1182 | if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { | |
1183 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; | |
1184 | if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) | |
1185 | clear_nlink(inode); | |
1186 | } | |
1187 | generic_drop_inode(inode); | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * gfs2_clear_inode - Deallocate an inode when VFS is done with it | |
1192 | * @inode: The VFS inode | |
1193 | * | |
1194 | */ | |
1195 | ||
1196 | static void gfs2_clear_inode(struct inode *inode) | |
1197 | { | |
1198 | struct gfs2_inode *ip = GFS2_I(inode); | |
1199 | ||
1200 | /* This tells us its a "real" inode and not one which only | |
1201 | * serves to contain an address space (see rgrp.c, meta_io.c) | |
1202 | * which therefore doesn't have its own glocks. | |
1203 | */ | |
1204 | if (test_bit(GIF_USER, &ip->i_flags)) { | |
1205 | ip->i_gl->gl_object = NULL; | |
1206 | gfs2_glock_put(ip->i_gl); | |
1207 | ip->i_gl = NULL; | |
1208 | if (ip->i_iopen_gh.gh_gl) { | |
1209 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
1210 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
1211 | } | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | |
1216 | { | |
1217 | do { | |
1218 | if (d1 == d2) | |
1219 | return 1; | |
1220 | d1 = d1->d_parent; | |
1221 | } while (!IS_ROOT(d1)); | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * gfs2_show_options - Show mount options for /proc/mounts | |
1227 | * @s: seq_file structure | |
1228 | * @mnt: vfsmount | |
1229 | * | |
1230 | * Returns: 0 on success or error code | |
1231 | */ | |
1232 | ||
1233 | static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) | |
1234 | { | |
1235 | struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; | |
1236 | struct gfs2_args *args = &sdp->sd_args; | |
3d3c10f2 | 1237 | int val; |
9e6e0a12 SW |
1238 | |
1239 | if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) | |
1240 | seq_printf(s, ",meta"); | |
1241 | if (args->ar_lockproto[0]) | |
1242 | seq_printf(s, ",lockproto=%s", args->ar_lockproto); | |
1243 | if (args->ar_locktable[0]) | |
1244 | seq_printf(s, ",locktable=%s", args->ar_locktable); | |
1245 | if (args->ar_hostdata[0]) | |
1246 | seq_printf(s, ",hostdata=%s", args->ar_hostdata); | |
1247 | if (args->ar_spectator) | |
1248 | seq_printf(s, ",spectator"); | |
1249 | if (args->ar_ignore_local_fs) | |
1250 | seq_printf(s, ",ignore_local_fs"); | |
1251 | if (args->ar_localflocks) | |
1252 | seq_printf(s, ",localflocks"); | |
1253 | if (args->ar_localcaching) | |
1254 | seq_printf(s, ",localcaching"); | |
1255 | if (args->ar_debug) | |
1256 | seq_printf(s, ",debug"); | |
1257 | if (args->ar_upgrade) | |
1258 | seq_printf(s, ",upgrade"); | |
1259 | if (args->ar_posix_acl) | |
1260 | seq_printf(s, ",acl"); | |
1261 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { | |
1262 | char *state; | |
1263 | switch (args->ar_quota) { | |
1264 | case GFS2_QUOTA_OFF: | |
1265 | state = "off"; | |
1266 | break; | |
1267 | case GFS2_QUOTA_ACCOUNT: | |
1268 | state = "account"; | |
1269 | break; | |
1270 | case GFS2_QUOTA_ON: | |
1271 | state = "on"; | |
1272 | break; | |
1273 | default: | |
1274 | state = "unknown"; | |
1275 | break; | |
1276 | } | |
1277 | seq_printf(s, ",quota=%s", state); | |
1278 | } | |
1279 | if (args->ar_suiddir) | |
1280 | seq_printf(s, ",suiddir"); | |
1281 | if (args->ar_data != GFS2_DATA_DEFAULT) { | |
1282 | char *state; | |
1283 | switch (args->ar_data) { | |
1284 | case GFS2_DATA_WRITEBACK: | |
1285 | state = "writeback"; | |
1286 | break; | |
1287 | case GFS2_DATA_ORDERED: | |
1288 | state = "ordered"; | |
1289 | break; | |
1290 | default: | |
1291 | state = "unknown"; | |
1292 | break; | |
1293 | } | |
1294 | seq_printf(s, ",data=%s", state); | |
1295 | } | |
1296 | if (args->ar_discard) | |
1297 | seq_printf(s, ",discard"); | |
3d3c10f2 BM |
1298 | val = sdp->sd_tune.gt_log_flush_secs; |
1299 | if (val != 60) | |
1300 | seq_printf(s, ",commit=%d", val); | |
1301 | val = sdp->sd_tune.gt_statfs_quantum; | |
1302 | if (val != 30) | |
1303 | seq_printf(s, ",statfs_quantum=%d", val); | |
1304 | val = sdp->sd_tune.gt_quota_quantum; | |
1305 | if (val != 60) | |
1306 | seq_printf(s, ",quota_quantum=%d", val); | |
1307 | if (args->ar_statfs_percent) | |
1308 | seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); | |
d34843d0 BP |
1309 | if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
1310 | const char *state; | |
1311 | ||
1312 | switch (args->ar_errors) { | |
1313 | case GFS2_ERRORS_WITHDRAW: | |
1314 | state = "withdraw"; | |
1315 | break; | |
1316 | case GFS2_ERRORS_PANIC: | |
1317 | state = "panic"; | |
1318 | break; | |
1319 | default: | |
1320 | state = "unknown"; | |
1321 | break; | |
1322 | } | |
1323 | seq_printf(s, ",errors=%s", state); | |
1324 | } | |
9e6e0a12 SW |
1325 | return 0; |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * We have to (at the moment) hold the inodes main lock to cover | |
1330 | * the gap between unlocking the shared lock on the iopen lock and | |
1331 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
1332 | * conversion on the iopen lock, but we can change that later. This | |
1333 | * is safe, just less efficient. | |
1334 | */ | |
1335 | ||
1336 | static void gfs2_delete_inode(struct inode *inode) | |
1337 | { | |
1338 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; | |
1339 | struct gfs2_inode *ip = GFS2_I(inode); | |
1340 | struct gfs2_holder gh; | |
1341 | int error; | |
1342 | ||
1343 | if (!test_bit(GIF_USER, &ip->i_flags)) | |
1344 | goto out; | |
1345 | ||
1346 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
1347 | if (unlikely(error)) { | |
1348 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
1349 | goto out; | |
1350 | } | |
1351 | ||
acf7e244 SW |
1352 | error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); |
1353 | if (error) | |
1354 | goto out_truncate; | |
1355 | ||
9e6e0a12 SW |
1356 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
1357 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); | |
1358 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
1359 | if (error) | |
1360 | goto out_truncate; | |
1361 | ||
1362 | if (S_ISDIR(inode->i_mode) && | |
1363 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | |
1364 | error = gfs2_dir_exhash_dealloc(ip); | |
1365 | if (error) | |
1366 | goto out_unlock; | |
1367 | } | |
1368 | ||
1369 | if (ip->i_eattr) { | |
1370 | error = gfs2_ea_dealloc(ip); | |
1371 | if (error) | |
1372 | goto out_unlock; | |
1373 | } | |
1374 | ||
1375 | if (!gfs2_is_stuffed(ip)) { | |
1376 | error = gfs2_file_dealloc(ip); | |
1377 | if (error) | |
1378 | goto out_unlock; | |
1379 | } | |
1380 | ||
1381 | error = gfs2_dinode_dealloc(ip); | |
1382 | if (error) | |
1383 | goto out_unlock; | |
1384 | ||
1385 | out_truncate: | |
1386 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); | |
1387 | if (error) | |
1388 | goto out_unlock; | |
1389 | /* Needs to be done before glock release & also in a transaction */ | |
1390 | truncate_inode_pages(&inode->i_data, 0); | |
1391 | gfs2_trans_end(sdp); | |
1392 | ||
1393 | out_unlock: | |
1394 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) | |
1395 | gfs2_glock_dq(&ip->i_iopen_gh); | |
1396 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
1397 | gfs2_glock_dq_uninit(&gh); | |
1398 | if (error && error != GLR_TRYFAILED && error != -EROFS) | |
1399 | fs_warn(sdp, "gfs2_delete_inode: %d\n", error); | |
1400 | out: | |
1401 | truncate_inode_pages(&inode->i_data, 0); | |
1402 | clear_inode(inode); | |
1403 | } | |
1404 | ||
1405 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | |
1406 | { | |
1407 | struct gfs2_inode *ip; | |
1408 | ||
1409 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
1410 | if (ip) { | |
1411 | ip->i_flags = 0; | |
1412 | ip->i_gl = NULL; | |
1413 | } | |
1414 | return &ip->i_inode; | |
1415 | } | |
1416 | ||
1417 | static void gfs2_destroy_inode(struct inode *inode) | |
1418 | { | |
1419 | kmem_cache_free(gfs2_inode_cachep, inode); | |
1420 | } | |
1421 | ||
1422 | const struct super_operations gfs2_super_ops = { | |
1423 | .alloc_inode = gfs2_alloc_inode, | |
1424 | .destroy_inode = gfs2_destroy_inode, | |
1425 | .write_inode = gfs2_write_inode, | |
1426 | .delete_inode = gfs2_delete_inode, | |
1427 | .put_super = gfs2_put_super, | |
9e6e0a12 SW |
1428 | .sync_fs = gfs2_sync_fs, |
1429 | .freeze_fs = gfs2_freeze, | |
1430 | .unfreeze_fs = gfs2_unfreeze, | |
1431 | .statfs = gfs2_statfs, | |
1432 | .remount_fs = gfs2_remount_fs, | |
1433 | .clear_inode = gfs2_clear_inode, | |
1434 | .drop_inode = gfs2_drop_inode, | |
1435 | .show_options = gfs2_show_options, | |
1436 | }; | |
1437 |