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