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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 | ||
d77d1b58 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
9e6e0a12 | 12 | #include <linux/bio.h> |
174cd4b1 | 13 | #include <linux/sched/signal.h> |
b3b94faa DT |
14 | #include <linux/slab.h> |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/buffer_head.h> | |
9e6e0a12 SW |
18 | #include <linux/statfs.h> |
19 | #include <linux/seq_file.h> | |
20 | #include <linux/mount.h> | |
21 | #include <linux/kthread.h> | |
22 | #include <linux/delay.h> | |
5c676f6d | 23 | #include <linux/gfs2_ondisk.h> |
9e6e0a12 SW |
24 | #include <linux/crc32.h> |
25 | #include <linux/time.h> | |
e402746a | 26 | #include <linux/wait.h> |
a9185b41 | 27 | #include <linux/writeback.h> |
4667a0ec | 28 | #include <linux/backing-dev.h> |
2e60d768 | 29 | #include <linux/kernel.h> |
b3b94faa DT |
30 | |
31 | #include "gfs2.h" | |
5c676f6d | 32 | #include "incore.h" |
b3b94faa DT |
33 | #include "bmap.h" |
34 | #include "dir.h" | |
b3b94faa DT |
35 | #include "glock.h" |
36 | #include "glops.h" | |
37 | #include "inode.h" | |
38 | #include "log.h" | |
39 | #include "meta_io.h" | |
40 | #include "quota.h" | |
41 | #include "recovery.h" | |
42 | #include "rgrp.h" | |
43 | #include "super.h" | |
44 | #include "trans.h" | |
5c676f6d | 45 | #include "util.h" |
9e6e0a12 | 46 | #include "sys.h" |
307cf6e6 | 47 | #include "xattr.h" |
9e6e0a12 SW |
48 | |
49 | #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) | |
50 | ||
51 | enum { | |
52 | Opt_lockproto, | |
53 | Opt_locktable, | |
54 | Opt_hostdata, | |
55 | Opt_spectator, | |
56 | Opt_ignore_local_fs, | |
57 | Opt_localflocks, | |
58 | Opt_localcaching, | |
59 | Opt_debug, | |
60 | Opt_nodebug, | |
61 | Opt_upgrade, | |
62 | Opt_acl, | |
63 | Opt_noacl, | |
64 | Opt_quota_off, | |
65 | Opt_quota_account, | |
66 | Opt_quota_on, | |
67 | Opt_quota, | |
68 | Opt_noquota, | |
69 | Opt_suiddir, | |
70 | Opt_nosuiddir, | |
71 | Opt_data_writeback, | |
72 | Opt_data_ordered, | |
73 | Opt_meta, | |
74 | Opt_discard, | |
75 | Opt_nodiscard, | |
76 | Opt_commit, | |
d34843d0 BP |
77 | Opt_err_withdraw, |
78 | Opt_err_panic, | |
3d3c10f2 BM |
79 | Opt_statfs_quantum, |
80 | Opt_statfs_percent, | |
81 | Opt_quota_quantum, | |
f25934c5 CH |
82 | Opt_barrier, |
83 | Opt_nobarrier, | |
90306c41 BM |
84 | Opt_rgrplvb, |
85 | Opt_norgrplvb, | |
471f3db2 BM |
86 | Opt_loccookie, |
87 | Opt_noloccookie, | |
9e6e0a12 SW |
88 | Opt_error, |
89 | }; | |
90 | ||
91 | static const match_table_t tokens = { | |
92 | {Opt_lockproto, "lockproto=%s"}, | |
93 | {Opt_locktable, "locktable=%s"}, | |
94 | {Opt_hostdata, "hostdata=%s"}, | |
95 | {Opt_spectator, "spectator"}, | |
43f74c19 | 96 | {Opt_spectator, "norecovery"}, |
9e6e0a12 SW |
97 | {Opt_ignore_local_fs, "ignore_local_fs"}, |
98 | {Opt_localflocks, "localflocks"}, | |
99 | {Opt_localcaching, "localcaching"}, | |
100 | {Opt_debug, "debug"}, | |
101 | {Opt_nodebug, "nodebug"}, | |
102 | {Opt_upgrade, "upgrade"}, | |
103 | {Opt_acl, "acl"}, | |
104 | {Opt_noacl, "noacl"}, | |
105 | {Opt_quota_off, "quota=off"}, | |
106 | {Opt_quota_account, "quota=account"}, | |
107 | {Opt_quota_on, "quota=on"}, | |
108 | {Opt_quota, "quota"}, | |
109 | {Opt_noquota, "noquota"}, | |
110 | {Opt_suiddir, "suiddir"}, | |
111 | {Opt_nosuiddir, "nosuiddir"}, | |
112 | {Opt_data_writeback, "data=writeback"}, | |
113 | {Opt_data_ordered, "data=ordered"}, | |
114 | {Opt_meta, "meta"}, | |
115 | {Opt_discard, "discard"}, | |
116 | {Opt_nodiscard, "nodiscard"}, | |
117 | {Opt_commit, "commit=%d"}, | |
d34843d0 BP |
118 | {Opt_err_withdraw, "errors=withdraw"}, |
119 | {Opt_err_panic, "errors=panic"}, | |
3d3c10f2 BM |
120 | {Opt_statfs_quantum, "statfs_quantum=%d"}, |
121 | {Opt_statfs_percent, "statfs_percent=%d"}, | |
122 | {Opt_quota_quantum, "quota_quantum=%d"}, | |
f25934c5 CH |
123 | {Opt_barrier, "barrier"}, |
124 | {Opt_nobarrier, "nobarrier"}, | |
90306c41 BM |
125 | {Opt_rgrplvb, "rgrplvb"}, |
126 | {Opt_norgrplvb, "norgrplvb"}, | |
471f3db2 BM |
127 | {Opt_loccookie, "loccookie"}, |
128 | {Opt_noloccookie, "noloccookie"}, | |
9e6e0a12 SW |
129 | {Opt_error, NULL} |
130 | }; | |
131 | ||
132 | /** | |
133 | * gfs2_mount_args - Parse mount options | |
f55073ff SW |
134 | * @args: The structure into which the parsed options will be written |
135 | * @options: The options to parse | |
9e6e0a12 SW |
136 | * |
137 | * Return: errno | |
138 | */ | |
139 | ||
f55073ff | 140 | int gfs2_mount_args(struct gfs2_args *args, char *options) |
9e6e0a12 SW |
141 | { |
142 | char *o; | |
143 | int token; | |
144 | substring_t tmp[MAX_OPT_ARGS]; | |
145 | int rv; | |
146 | ||
147 | /* Split the options into tokens with the "," character and | |
148 | process them */ | |
149 | ||
150 | while (1) { | |
151 | o = strsep(&options, ","); | |
152 | if (o == NULL) | |
153 | break; | |
154 | if (*o == '\0') | |
155 | continue; | |
156 | ||
157 | token = match_token(o, tokens, tmp); | |
158 | switch (token) { | |
159 | case Opt_lockproto: | |
160 | match_strlcpy(args->ar_lockproto, &tmp[0], | |
161 | GFS2_LOCKNAME_LEN); | |
162 | break; | |
163 | case Opt_locktable: | |
164 | match_strlcpy(args->ar_locktable, &tmp[0], | |
165 | GFS2_LOCKNAME_LEN); | |
166 | break; | |
167 | case Opt_hostdata: | |
168 | match_strlcpy(args->ar_hostdata, &tmp[0], | |
169 | GFS2_LOCKNAME_LEN); | |
170 | break; | |
171 | case Opt_spectator: | |
172 | args->ar_spectator = 1; | |
173 | break; | |
174 | case Opt_ignore_local_fs: | |
f57a024e | 175 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
176 | break; |
177 | case Opt_localflocks: | |
178 | args->ar_localflocks = 1; | |
179 | break; | |
180 | case Opt_localcaching: | |
c2048b00 | 181 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
182 | break; |
183 | case Opt_debug: | |
d34843d0 | 184 | if (args->ar_errors == GFS2_ERRORS_PANIC) { |
d77d1b58 | 185 | pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
d34843d0 BP |
186 | return -EINVAL; |
187 | } | |
9e6e0a12 SW |
188 | args->ar_debug = 1; |
189 | break; | |
190 | case Opt_nodebug: | |
191 | args->ar_debug = 0; | |
192 | break; | |
193 | case Opt_upgrade: | |
c80dbb58 | 194 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
195 | break; |
196 | case Opt_acl: | |
197 | args->ar_posix_acl = 1; | |
198 | break; | |
199 | case Opt_noacl: | |
200 | args->ar_posix_acl = 0; | |
201 | break; | |
202 | case Opt_quota_off: | |
203 | case Opt_noquota: | |
204 | args->ar_quota = GFS2_QUOTA_OFF; | |
205 | break; | |
206 | case Opt_quota_account: | |
207 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
208 | break; | |
209 | case Opt_quota_on: | |
210 | case Opt_quota: | |
211 | args->ar_quota = GFS2_QUOTA_ON; | |
212 | break; | |
213 | case Opt_suiddir: | |
214 | args->ar_suiddir = 1; | |
215 | break; | |
216 | case Opt_nosuiddir: | |
217 | args->ar_suiddir = 0; | |
218 | break; | |
219 | case Opt_data_writeback: | |
220 | args->ar_data = GFS2_DATA_WRITEBACK; | |
221 | break; | |
222 | case Opt_data_ordered: | |
223 | args->ar_data = GFS2_DATA_ORDERED; | |
224 | break; | |
225 | case Opt_meta: | |
226 | args->ar_meta = 1; | |
227 | break; | |
228 | case Opt_discard: | |
229 | args->ar_discard = 1; | |
230 | break; | |
231 | case Opt_nodiscard: | |
232 | args->ar_discard = 0; | |
233 | break; | |
234 | case Opt_commit: | |
235 | rv = match_int(&tmp[0], &args->ar_commit); | |
236 | if (rv || args->ar_commit <= 0) { | |
d77d1b58 | 237 | pr_warn("commit mount option requires a positive numeric argument\n"); |
9e6e0a12 SW |
238 | return rv ? rv : -EINVAL; |
239 | } | |
240 | break; | |
3d3c10f2 BM |
241 | case Opt_statfs_quantum: |
242 | rv = match_int(&tmp[0], &args->ar_statfs_quantum); | |
243 | if (rv || args->ar_statfs_quantum < 0) { | |
d77d1b58 | 244 | pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n"); |
3d3c10f2 BM |
245 | return rv ? rv : -EINVAL; |
246 | } | |
247 | break; | |
248 | case Opt_quota_quantum: | |
249 | rv = match_int(&tmp[0], &args->ar_quota_quantum); | |
250 | if (rv || args->ar_quota_quantum <= 0) { | |
d77d1b58 | 251 | pr_warn("quota_quantum mount option requires a positive numeric argument\n"); |
3d3c10f2 BM |
252 | return rv ? rv : -EINVAL; |
253 | } | |
254 | break; | |
255 | case Opt_statfs_percent: | |
256 | rv = match_int(&tmp[0], &args->ar_statfs_percent); | |
257 | if (rv || args->ar_statfs_percent < 0 || | |
258 | args->ar_statfs_percent > 100) { | |
fc554ed3 | 259 | pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n"); |
3d3c10f2 BM |
260 | return rv ? rv : -EINVAL; |
261 | } | |
262 | break; | |
d34843d0 BP |
263 | case Opt_err_withdraw: |
264 | args->ar_errors = GFS2_ERRORS_WITHDRAW; | |
265 | break; | |
266 | case Opt_err_panic: | |
267 | if (args->ar_debug) { | |
d77d1b58 | 268 | pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
d34843d0 BP |
269 | return -EINVAL; |
270 | } | |
271 | args->ar_errors = GFS2_ERRORS_PANIC; | |
272 | break; | |
f25934c5 CH |
273 | case Opt_barrier: |
274 | args->ar_nobarrier = 0; | |
275 | break; | |
276 | case Opt_nobarrier: | |
277 | args->ar_nobarrier = 1; | |
278 | break; | |
90306c41 BM |
279 | case Opt_rgrplvb: |
280 | args->ar_rgrplvb = 1; | |
281 | break; | |
282 | case Opt_norgrplvb: | |
283 | args->ar_rgrplvb = 0; | |
284 | break; | |
471f3db2 BM |
285 | case Opt_loccookie: |
286 | args->ar_loccookie = 1; | |
287 | break; | |
288 | case Opt_noloccookie: | |
289 | args->ar_loccookie = 0; | |
290 | break; | |
9e6e0a12 SW |
291 | case Opt_error: |
292 | default: | |
d77d1b58 | 293 | pr_warn("invalid mount option: %s\n", o); |
9e6e0a12 SW |
294 | return -EINVAL; |
295 | } | |
296 | } | |
297 | ||
298 | return 0; | |
299 | } | |
b3b94faa | 300 | |
fefc03bf SW |
301 | /** |
302 | * gfs2_jindex_free - Clear all the journal index information | |
303 | * @sdp: The GFS2 superblock | |
304 | * | |
305 | */ | |
306 | ||
307 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
308 | { | |
b50f227b | 309 | struct list_head list; |
fefc03bf | 310 | struct gfs2_jdesc *jd; |
fefc03bf SW |
311 | |
312 | spin_lock(&sdp->sd_jindex_spin); | |
313 | list_add(&list, &sdp->sd_jindex_list); | |
314 | list_del_init(&sdp->sd_jindex_list); | |
315 | sdp->sd_journals = 0; | |
316 | spin_unlock(&sdp->sd_jindex_spin); | |
317 | ||
318 | while (!list_empty(&list)) { | |
319 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
b50f227b | 320 | gfs2_free_journal_extents(jd); |
fefc03bf SW |
321 | list_del(&jd->jd_list); |
322 | iput(jd->jd_inode); | |
323 | kfree(jd); | |
324 | } | |
325 | } | |
326 | ||
b3b94faa DT |
327 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) |
328 | { | |
329 | struct gfs2_jdesc *jd; | |
330 | int found = 0; | |
331 | ||
332 | list_for_each_entry(jd, head, jd_list) { | |
333 | if (jd->jd_jid == jid) { | |
334 | found = 1; | |
335 | break; | |
336 | } | |
337 | } | |
338 | ||
339 | if (!found) | |
340 | jd = NULL; | |
341 | ||
342 | return jd; | |
343 | } | |
344 | ||
345 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
346 | { | |
347 | struct gfs2_jdesc *jd; | |
348 | ||
349 | spin_lock(&sdp->sd_jindex_spin); | |
350 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
351 | spin_unlock(&sdp->sd_jindex_spin); | |
352 | ||
353 | return jd; | |
354 | } | |
355 | ||
b3b94faa DT |
356 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) |
357 | { | |
feaa7bba SW |
358 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
359 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
a2e0f799 | 360 | u64 size = i_size_read(jd->jd_inode); |
b3b94faa | 361 | |
47a9a527 | 362 | if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30))) |
b3b94faa | 363 | return -EIO; |
b3b94faa | 364 | |
a2e0f799 SW |
365 | jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; |
366 | ||
367 | if (gfs2_write_alloc_required(ip, 0, size)) { | |
b3b94faa | 368 | gfs2_consist_inode(ip); |
461cb419 | 369 | return -EIO; |
b3b94faa DT |
370 | } |
371 | ||
461cb419 | 372 | return 0; |
b3b94faa DT |
373 | } |
374 | ||
8ad151c2 SW |
375 | static int init_threads(struct gfs2_sbd *sdp) |
376 | { | |
377 | struct task_struct *p; | |
378 | int error = 0; | |
379 | ||
380 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); | |
381 | if (IS_ERR(p)) { | |
382 | error = PTR_ERR(p); | |
383 | fs_err(sdp, "can't start logd thread: %d\n", error); | |
384 | return error; | |
385 | } | |
386 | sdp->sd_logd_process = p; | |
387 | ||
388 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); | |
389 | if (IS_ERR(p)) { | |
390 | error = PTR_ERR(p); | |
391 | fs_err(sdp, "can't start quotad thread: %d\n", error); | |
392 | goto fail; | |
393 | } | |
394 | sdp->sd_quotad_process = p; | |
395 | return 0; | |
396 | ||
397 | fail: | |
398 | kthread_stop(sdp->sd_logd_process); | |
399 | return error; | |
400 | } | |
401 | ||
b3b94faa DT |
402 | /** |
403 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
404 | * @sdp: the filesystem | |
405 | * | |
406 | * Returns: errno | |
407 | */ | |
408 | ||
409 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
410 | { | |
feaa7bba | 411 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 412 | struct gfs2_glock *j_gl = ip->i_gl; |
2e60d768 | 413 | struct gfs2_holder freeze_gh; |
55167622 | 414 | struct gfs2_log_header_host head; |
b3b94faa DT |
415 | int error; |
416 | ||
8ad151c2 | 417 | error = init_threads(sdp); |
b3b94faa DT |
418 | if (error) |
419 | return error; | |
420 | ||
24972557 | 421 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, |
2e60d768 | 422 | &freeze_gh); |
8ad151c2 SW |
423 | if (error) |
424 | goto fail_threads; | |
425 | ||
1a14d3a6 | 426 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
427 | |
428 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
429 | if (error) | |
430 | goto fail; | |
431 | ||
432 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
433 | gfs2_consist(sdp); | |
434 | error = -EIO; | |
435 | goto fail; | |
436 | } | |
437 | ||
438 | /* Initialize some head of the log stuff */ | |
439 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
440 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
441 | ||
b3b94faa DT |
442 | error = gfs2_quota_init(sdp); |
443 | if (error) | |
a91ea69f | 444 | goto fail; |
b3b94faa DT |
445 | |
446 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
447 | ||
2e60d768 | 448 | gfs2_glock_dq_uninit(&freeze_gh); |
b3b94faa DT |
449 | |
450 | return 0; | |
451 | ||
a91ea69f | 452 | fail: |
2e60d768 BM |
453 | freeze_gh.gh_flags |= GL_NOCACHE; |
454 | gfs2_glock_dq_uninit(&freeze_gh); | |
8ad151c2 SW |
455 | fail_threads: |
456 | kthread_stop(sdp->sd_quotad_process); | |
457 | kthread_stop(sdp->sd_logd_process); | |
b3b94faa DT |
458 | return error; |
459 | } | |
460 | ||
1946f70a | 461 | void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
bb8d8a6f SW |
462 | { |
463 | const struct gfs2_statfs_change *str = buf; | |
464 | ||
465 | sc->sc_total = be64_to_cpu(str->sc_total); | |
466 | sc->sc_free = be64_to_cpu(str->sc_free); | |
467 | sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); | |
468 | } | |
469 | ||
470 | static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) | |
471 | { | |
472 | struct gfs2_statfs_change *str = buf; | |
473 | ||
474 | str->sc_total = cpu_to_be64(sc->sc_total); | |
475 | str->sc_free = cpu_to_be64(sc->sc_free); | |
476 | str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); | |
477 | } | |
478 | ||
b3b94faa DT |
479 | int gfs2_statfs_init(struct gfs2_sbd *sdp) |
480 | { | |
feaa7bba | 481 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 482 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 483 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 484 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
485 | struct buffer_head *m_bh, *l_bh; |
486 | struct gfs2_holder gh; | |
487 | int error; | |
488 | ||
489 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
490 | &gh); | |
491 | if (error) | |
492 | return error; | |
493 | ||
494 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
495 | if (error) | |
496 | goto out; | |
497 | ||
498 | if (sdp->sd_args.ar_spectator) { | |
499 | spin_lock(&sdp->sd_statfs_spin); | |
500 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
501 | sizeof(struct gfs2_dinode)); | |
502 | spin_unlock(&sdp->sd_statfs_spin); | |
503 | } else { | |
504 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
505 | if (error) | |
506 | goto out_m_bh; | |
507 | ||
508 | spin_lock(&sdp->sd_statfs_spin); | |
509 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
510 | sizeof(struct gfs2_dinode)); | |
511 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
512 | sizeof(struct gfs2_dinode)); | |
513 | spin_unlock(&sdp->sd_statfs_spin); | |
514 | ||
515 | brelse(l_bh); | |
516 | } | |
517 | ||
a91ea69f | 518 | out_m_bh: |
b3b94faa | 519 | brelse(m_bh); |
a91ea69f | 520 | out: |
b3b94faa | 521 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
522 | return 0; |
523 | } | |
524 | ||
cd915493 SW |
525 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
526 | s64 dinodes) | |
b3b94faa | 527 | { |
feaa7bba | 528 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 529 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
3d3c10f2 | 530 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
b3b94faa | 531 | struct buffer_head *l_bh; |
c14f5735 BM |
532 | s64 x, y; |
533 | int need_sync = 0; | |
b3b94faa DT |
534 | int error; |
535 | ||
536 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
537 | if (error) | |
538 | return; | |
539 | ||
350a9b0a | 540 | gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
b3b94faa DT |
541 | |
542 | spin_lock(&sdp->sd_statfs_spin); | |
543 | l_sc->sc_total += total; | |
544 | l_sc->sc_free += free; | |
545 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 546 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
c14f5735 BM |
547 | if (sdp->sd_args.ar_statfs_percent) { |
548 | x = 100 * l_sc->sc_free; | |
549 | y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; | |
550 | if (x >= y || x <= -y) | |
551 | need_sync = 1; | |
552 | } | |
b3b94faa DT |
553 | spin_unlock(&sdp->sd_statfs_spin); |
554 | ||
555 | brelse(l_bh); | |
c14f5735 | 556 | if (need_sync) |
3d3c10f2 | 557 | gfs2_wake_up_statfs(sdp); |
b3b94faa DT |
558 | } |
559 | ||
1946f70a BM |
560 | void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, |
561 | struct buffer_head *l_bh) | |
562 | { | |
563 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); | |
564 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
565 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
566 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
567 | ||
350a9b0a | 568 | gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
901c6c66 | 569 | gfs2_trans_add_meta(m_ip->i_gl, m_bh); |
1946f70a BM |
570 | |
571 | spin_lock(&sdp->sd_statfs_spin); | |
572 | m_sc->sc_total += l_sc->sc_total; | |
573 | m_sc->sc_free += l_sc->sc_free; | |
574 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
575 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
576 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
577 | 0, sizeof(struct gfs2_statfs_change)); | |
1946f70a | 578 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
901c6c66 | 579 | spin_unlock(&sdp->sd_statfs_spin); |
1946f70a BM |
580 | } |
581 | ||
8c42d637 | 582 | int gfs2_statfs_sync(struct super_block *sb, int type) |
b3b94faa | 583 | { |
8c42d637 | 584 | struct gfs2_sbd *sdp = sb->s_fs_info; |
feaa7bba SW |
585 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
586 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
587 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
588 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
589 | struct gfs2_holder gh; |
590 | struct buffer_head *m_bh, *l_bh; | |
591 | int error; | |
592 | ||
2e60d768 | 593 | sb_start_write(sb); |
b3b94faa DT |
594 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, |
595 | &gh); | |
596 | if (error) | |
2e60d768 | 597 | goto out; |
b3b94faa DT |
598 | |
599 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
600 | if (error) | |
2e60d768 | 601 | goto out_unlock; |
b3b94faa DT |
602 | |
603 | spin_lock(&sdp->sd_statfs_spin); | |
604 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 605 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
606 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
607 | spin_unlock(&sdp->sd_statfs_spin); | |
608 | goto out_bh; | |
609 | } | |
610 | spin_unlock(&sdp->sd_statfs_spin); | |
611 | ||
612 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
613 | if (error) | |
614 | goto out_bh; | |
615 | ||
616 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
617 | if (error) | |
618 | goto out_bh2; | |
619 | ||
1946f70a | 620 | update_statfs(sdp, m_bh, l_bh); |
3d3c10f2 | 621 | sdp->sd_statfs_force_sync = 0; |
b3b94faa DT |
622 | |
623 | gfs2_trans_end(sdp); | |
624 | ||
a91ea69f | 625 | out_bh2: |
b3b94faa | 626 | brelse(l_bh); |
a91ea69f | 627 | out_bh: |
b3b94faa | 628 | brelse(m_bh); |
2e60d768 | 629 | out_unlock: |
b3b94faa | 630 | gfs2_glock_dq_uninit(&gh); |
2e60d768 BM |
631 | out: |
632 | sb_end_write(sb); | |
b3b94faa DT |
633 | return error; |
634 | } | |
635 | ||
b3b94faa DT |
636 | struct lfcc { |
637 | struct list_head list; | |
638 | struct gfs2_holder gh; | |
639 | }; | |
640 | ||
641 | /** | |
642 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
643 | * journals are clean | |
644 | * @sdp: the file system | |
645 | * @state: the state to put the transaction lock into | |
646 | * @t_gh: the hold on the transaction lock | |
647 | * | |
648 | * Returns: errno | |
649 | */ | |
650 | ||
08bc2dbc | 651 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
24972557 | 652 | struct gfs2_holder *freeze_gh) |
b3b94faa | 653 | { |
5c676f6d | 654 | struct gfs2_inode *ip; |
b3b94faa DT |
655 | struct gfs2_jdesc *jd; |
656 | struct lfcc *lfcc; | |
657 | LIST_HEAD(list); | |
55167622 | 658 | struct gfs2_log_header_host lh; |
b3b94faa DT |
659 | int error; |
660 | ||
b3b94faa DT |
661 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
662 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
663 | if (!lfcc) { | |
664 | error = -ENOMEM; | |
665 | goto out; | |
666 | } | |
feaa7bba SW |
667 | ip = GFS2_I(jd->jd_inode); |
668 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
669 | if (error) { |
670 | kfree(lfcc); | |
671 | goto out; | |
672 | } | |
673 | list_add(&lfcc->list, &list); | |
674 | } | |
675 | ||
24972557 BM |
676 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, |
677 | GL_NOCACHE, freeze_gh); | |
b3b94faa DT |
678 | |
679 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
680 | error = gfs2_jdesc_check(jd); | |
681 | if (error) | |
682 | break; | |
683 | error = gfs2_find_jhead(jd, &lh); | |
684 | if (error) | |
685 | break; | |
686 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
687 | error = -EBUSY; | |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
692 | if (error) | |
24972557 | 693 | gfs2_glock_dq_uninit(freeze_gh); |
b3b94faa | 694 | |
a91ea69f | 695 | out: |
b3b94faa DT |
696 | while (!list_empty(&list)) { |
697 | lfcc = list_entry(list.next, struct lfcc, list); | |
698 | list_del(&lfcc->list); | |
699 | gfs2_glock_dq_uninit(&lfcc->gh); | |
700 | kfree(lfcc); | |
701 | } | |
b3b94faa DT |
702 | return error; |
703 | } | |
704 | ||
9eed04cd SW |
705 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
706 | { | |
707 | struct gfs2_dinode *str = buf; | |
708 | ||
709 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
710 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
711 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
712 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
713 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
714 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
d0546426 EB |
715 | str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); |
716 | str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); | |
9eed04cd SW |
717 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); |
718 | str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); | |
719 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); | |
720 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); | |
721 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
722 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
723 | ||
724 | str->di_goal_meta = cpu_to_be64(ip->i_goal); | |
725 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
726 | str->di_generation = cpu_to_be64(ip->i_generation); | |
727 | ||
728 | str->di_flags = cpu_to_be32(ip->i_diskflags); | |
729 | str->di_height = cpu_to_be16(ip->i_height); | |
730 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && | |
731 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? | |
732 | GFS2_FORMAT_DE : 0); | |
733 | str->di_depth = cpu_to_be16(ip->i_depth); | |
734 | str->di_entries = cpu_to_be32(ip->i_entries); | |
735 | ||
736 | str->di_eattr = cpu_to_be64(ip->i_eattr); | |
737 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); | |
738 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
739 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
740 | } | |
9e6e0a12 SW |
741 | |
742 | /** | |
743 | * gfs2_write_inode - Make sure the inode is stable on the disk | |
744 | * @inode: The inode | |
1027efaa | 745 | * @wbc: The writeback control structure |
9e6e0a12 SW |
746 | * |
747 | * Returns: errno | |
748 | */ | |
749 | ||
a9185b41 | 750 | static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) |
9e6e0a12 SW |
751 | { |
752 | struct gfs2_inode *ip = GFS2_I(inode); | |
753 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1027efaa | 754 | struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); |
de1414a6 | 755 | struct backing_dev_info *bdi = inode_to_bdi(metamapping->host); |
ab9bbda0 SW |
756 | int ret = 0; |
757 | ||
a9185b41 | 758 | if (wbc->sync_mode == WB_SYNC_ALL) |
24972557 | 759 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH); |
a88a341a | 760 | if (bdi->wb.dirty_exceeded) |
4667a0ec | 761 | gfs2_ail1_flush(sdp, wbc); |
1d4ec642 SW |
762 | else |
763 | filemap_fdatawrite(metamapping); | |
ab9bbda0 | 764 | if (wbc->sync_mode == WB_SYNC_ALL) |
1027efaa SW |
765 | ret = filemap_fdatawait(metamapping); |
766 | if (ret) | |
767 | mark_inode_dirty_sync(inode); | |
9e6e0a12 SW |
768 | return ret; |
769 | } | |
770 | ||
ab9bbda0 SW |
771 | /** |
772 | * gfs2_dirty_inode - check for atime updates | |
773 | * @inode: The inode in question | |
774 | * @flags: The type of dirty | |
775 | * | |
776 | * Unfortunately it can be called under any combination of inode | |
777 | * glock and transaction lock, so we have to check carefully. | |
778 | * | |
779 | * At the moment this deals only with atime - it should be possible | |
780 | * to expand that role in future, once a review of the locking has | |
781 | * been carried out. | |
782 | */ | |
783 | ||
784 | static void gfs2_dirty_inode(struct inode *inode, int flags) | |
785 | { | |
786 | struct gfs2_inode *ip = GFS2_I(inode); | |
787 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
788 | struct buffer_head *bh; | |
789 | struct gfs2_holder gh; | |
790 | int need_unlock = 0; | |
791 | int need_endtrans = 0; | |
792 | int ret; | |
793 | ||
794 | if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC))) | |
795 | return; | |
796 | ||
797 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { | |
798 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
799 | if (ret) { | |
800 | fs_err(sdp, "dirty_inode: glock %d\n", ret); | |
801 | return; | |
802 | } | |
803 | need_unlock = 1; | |
3d162688 BM |
804 | } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) |
805 | return; | |
ab9bbda0 SW |
806 | |
807 | if (current->journal_info == NULL) { | |
808 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
809 | if (ret) { | |
810 | fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); | |
811 | goto out; | |
812 | } | |
813 | need_endtrans = 1; | |
814 | } | |
815 | ||
816 | ret = gfs2_meta_inode_buffer(ip, &bh); | |
817 | if (ret == 0) { | |
350a9b0a | 818 | gfs2_trans_add_meta(ip->i_gl, bh); |
ab9bbda0 SW |
819 | gfs2_dinode_out(ip, bh->b_data); |
820 | brelse(bh); | |
821 | } | |
822 | ||
823 | if (need_endtrans) | |
824 | gfs2_trans_end(sdp); | |
825 | out: | |
826 | if (need_unlock) | |
827 | gfs2_glock_dq_uninit(&gh); | |
828 | } | |
829 | ||
9e6e0a12 SW |
830 | /** |
831 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
832 | * @sdp: the filesystem | |
833 | * | |
834 | * Returns: errno | |
835 | */ | |
836 | ||
837 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
838 | { | |
2e60d768 | 839 | struct gfs2_holder freeze_gh; |
9e6e0a12 SW |
840 | int error; |
841 | ||
24972557 | 842 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, |
2e60d768 | 843 | &freeze_gh); |
24972557 BM |
844 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
845 | return error; | |
846 | ||
8ad151c2 SW |
847 | kthread_stop(sdp->sd_quotad_process); |
848 | kthread_stop(sdp->sd_logd_process); | |
849 | ||
b94a170e | 850 | flush_workqueue(gfs2_delete_workqueue); |
ceed1723 | 851 | gfs2_quota_sync(sdp->sd_vfs, 0); |
8c42d637 | 852 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
9e6e0a12 | 853 | |
24972557 | 854 | gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH); |
2e60d768 | 855 | wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0); |
24972557 | 856 | gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); |
9e6e0a12 | 857 | |
6df9f9a2 | 858 | if (gfs2_holder_initialized(&freeze_gh)) |
2e60d768 | 859 | gfs2_glock_dq_uninit(&freeze_gh); |
9e6e0a12 SW |
860 | |
861 | gfs2_quota_cleanup(sdp); | |
862 | ||
863 | return error; | |
864 | } | |
865 | ||
9e6e0a12 SW |
866 | /** |
867 | * gfs2_put_super - Unmount the filesystem | |
868 | * @sb: The VFS superblock | |
869 | * | |
870 | */ | |
871 | ||
872 | static void gfs2_put_super(struct super_block *sb) | |
873 | { | |
874 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
875 | int error; | |
876 | struct gfs2_jdesc *jd; | |
877 | ||
9e6e0a12 SW |
878 | /* No more recovery requests */ |
879 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); | |
880 | smp_mb(); | |
881 | ||
882 | /* Wait on outstanding recovery */ | |
883 | restart: | |
884 | spin_lock(&sdp->sd_jindex_spin); | |
885 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
886 | if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) | |
887 | continue; | |
888 | spin_unlock(&sdp->sd_jindex_spin); | |
889 | wait_on_bit(&jd->jd_flags, JDF_RECOVERY, | |
74316201 | 890 | TASK_UNINTERRUPTIBLE); |
9e6e0a12 SW |
891 | goto restart; |
892 | } | |
893 | spin_unlock(&sdp->sd_jindex_spin); | |
894 | ||
9e6e0a12 SW |
895 | if (!(sb->s_flags & MS_RDONLY)) { |
896 | error = gfs2_make_fs_ro(sdp); | |
897 | if (error) | |
898 | gfs2_io_error(sdp); | |
899 | } | |
900 | /* At this point, we're through modifying the disk */ | |
901 | ||
902 | /* Release stuff */ | |
903 | ||
904 | iput(sdp->sd_jindex); | |
9e6e0a12 SW |
905 | iput(sdp->sd_statfs_inode); |
906 | iput(sdp->sd_rindex); | |
907 | iput(sdp->sd_quota_inode); | |
908 | ||
909 | gfs2_glock_put(sdp->sd_rename_gl); | |
24972557 | 910 | gfs2_glock_put(sdp->sd_freeze_gl); |
9e6e0a12 SW |
911 | |
912 | if (!sdp->sd_args.ar_spectator) { | |
913 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
914 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
9e6e0a12 SW |
915 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
916 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | |
9e6e0a12 SW |
917 | iput(sdp->sd_sc_inode); |
918 | iput(sdp->sd_qc_inode); | |
919 | } | |
920 | ||
921 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | |
922 | gfs2_clear_rgrpd(sdp); | |
923 | gfs2_jindex_free(sdp); | |
924 | /* Take apart glock structures and buffer lists */ | |
925 | gfs2_gl_hash_clear(sdp); | |
926 | /* Unmount the locking protocol */ | |
927 | gfs2_lm_unmount(sdp); | |
928 | ||
929 | /* At this point, we're through participating in the lockspace */ | |
930 | gfs2_sys_fs_del(sdp); | |
931 | } | |
932 | ||
9e6e0a12 SW |
933 | /** |
934 | * gfs2_sync_fs - sync the filesystem | |
935 | * @sb: the superblock | |
936 | * | |
937 | * Flushes the log to disk. | |
938 | */ | |
939 | ||
940 | static int gfs2_sync_fs(struct super_block *sb, int wait) | |
941 | { | |
1027efaa | 942 | struct gfs2_sbd *sdp = sb->s_fs_info; |
a1177825 JK |
943 | |
944 | gfs2_quota_sync(sb, -1); | |
2e60d768 | 945 | if (wait && sdp) |
24972557 | 946 | gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); |
9e6e0a12 SW |
947 | return 0; |
948 | } | |
949 | ||
2e60d768 BM |
950 | void gfs2_freeze_func(struct work_struct *work) |
951 | { | |
952 | int error; | |
953 | struct gfs2_holder freeze_gh; | |
954 | struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); | |
955 | struct super_block *sb = sdp->sd_vfs; | |
956 | ||
957 | atomic_inc(&sb->s_active); | |
958 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, | |
959 | &freeze_gh); | |
960 | if (error) { | |
961 | printk(KERN_INFO "GFS2: couln't get freeze lock : %d\n", error); | |
962 | gfs2_assert_withdraw(sdp, 0); | |
963 | } | |
964 | else { | |
965 | atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); | |
966 | error = thaw_super(sb); | |
967 | if (error) { | |
968 | printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n", | |
969 | error); | |
970 | gfs2_assert_withdraw(sdp, 0); | |
971 | } | |
972 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) | |
973 | freeze_gh.gh_flags |= GL_NOCACHE; | |
974 | gfs2_glock_dq_uninit(&freeze_gh); | |
975 | } | |
976 | deactivate_super(sb); | |
977 | return; | |
978 | } | |
979 | ||
9e6e0a12 SW |
980 | /** |
981 | * gfs2_freeze - prevent further writes to the filesystem | |
982 | * @sb: the VFS structure for the filesystem | |
983 | * | |
984 | */ | |
985 | ||
986 | static int gfs2_freeze(struct super_block *sb) | |
987 | { | |
988 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
2e60d768 | 989 | int error = 0; |
9e6e0a12 | 990 | |
2e60d768 BM |
991 | mutex_lock(&sdp->sd_freeze_mutex); |
992 | if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) | |
993 | goto out; | |
994 | ||
995 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { | |
996 | error = -EINVAL; | |
997 | goto out; | |
998 | } | |
9e6e0a12 SW |
999 | |
1000 | for (;;) { | |
d564053f | 1001 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); |
9e6e0a12 SW |
1002 | if (!error) |
1003 | break; | |
1004 | ||
1005 | switch (error) { | |
1006 | case -EBUSY: | |
1007 | fs_err(sdp, "waiting for recovery before freeze\n"); | |
1008 | break; | |
1009 | ||
1010 | default: | |
1011 | fs_err(sdp, "error freezing FS: %d\n", error); | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | fs_err(sdp, "retrying...\n"); | |
1016 | msleep(1000); | |
1017 | } | |
2e60d768 BM |
1018 | error = 0; |
1019 | out: | |
1020 | mutex_unlock(&sdp->sd_freeze_mutex); | |
1021 | return error; | |
9e6e0a12 SW |
1022 | } |
1023 | ||
1024 | /** | |
1025 | * gfs2_unfreeze - reallow writes to the filesystem | |
1026 | * @sb: the VFS structure for the filesystem | |
1027 | * | |
1028 | */ | |
1029 | ||
1030 | static int gfs2_unfreeze(struct super_block *sb) | |
1031 | { | |
d564053f SW |
1032 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1033 | ||
2e60d768 BM |
1034 | mutex_lock(&sdp->sd_freeze_mutex); |
1035 | if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || | |
6df9f9a2 | 1036 | !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { |
2e60d768 BM |
1037 | mutex_unlock(&sdp->sd_freeze_mutex); |
1038 | return 0; | |
1039 | } | |
1040 | ||
d564053f | 1041 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); |
2e60d768 | 1042 | mutex_unlock(&sdp->sd_freeze_mutex); |
9e6e0a12 SW |
1043 | return 0; |
1044 | } | |
1045 | ||
1046 | /** | |
1047 | * statfs_fill - fill in the sg for a given RG | |
1048 | * @rgd: the RG | |
1049 | * @sc: the sc structure | |
1050 | * | |
1051 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
1052 | */ | |
1053 | ||
1054 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
1055 | struct gfs2_statfs_change_host *sc) | |
1056 | { | |
1057 | gfs2_rgrp_verify(rgd); | |
1058 | sc->sc_total += rgd->rd_data; | |
1059 | sc->sc_free += rgd->rd_free; | |
1060 | sc->sc_dinodes += rgd->rd_dinodes; | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
1066 | * @sdp: the filesystem | |
1067 | * @sc: the sc info that will be returned | |
1068 | * | |
1069 | * Any error (other than a signal) will cause this routine to fall back | |
1070 | * to the synchronous version. | |
1071 | * | |
1072 | * FIXME: This really shouldn't busy wait like this. | |
1073 | * | |
1074 | * Returns: errno | |
1075 | */ | |
1076 | ||
1077 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1078 | { | |
9e6e0a12 SW |
1079 | struct gfs2_rgrpd *rgd_next; |
1080 | struct gfs2_holder *gha, *gh; | |
1081 | unsigned int slots = 64; | |
1082 | unsigned int x; | |
1083 | int done; | |
1084 | int error = 0, err; | |
1085 | ||
1086 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
6df9f9a2 | 1087 | gha = kmalloc(slots * sizeof(struct gfs2_holder), GFP_KERNEL); |
9e6e0a12 SW |
1088 | if (!gha) |
1089 | return -ENOMEM; | |
6df9f9a2 AG |
1090 | for (x = 0; x < slots; x++) |
1091 | gfs2_holder_mark_uninitialized(gha + x); | |
9e6e0a12 | 1092 | |
9e6e0a12 SW |
1093 | rgd_next = gfs2_rgrpd_get_first(sdp); |
1094 | ||
1095 | for (;;) { | |
1096 | done = 1; | |
1097 | ||
1098 | for (x = 0; x < slots; x++) { | |
1099 | gh = gha + x; | |
1100 | ||
6df9f9a2 | 1101 | if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) { |
9e6e0a12 SW |
1102 | err = gfs2_glock_wait(gh); |
1103 | if (err) { | |
1104 | gfs2_holder_uninit(gh); | |
1105 | error = err; | |
1106 | } else { | |
1107 | if (!error) | |
1108 | error = statfs_slow_fill( | |
1109 | gh->gh_gl->gl_object, sc); | |
1110 | gfs2_glock_dq_uninit(gh); | |
1111 | } | |
1112 | } | |
1113 | ||
6df9f9a2 | 1114 | if (gfs2_holder_initialized(gh)) |
9e6e0a12 SW |
1115 | done = 0; |
1116 | else if (rgd_next && !error) { | |
1117 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
1118 | LM_ST_SHARED, | |
1119 | GL_ASYNC, | |
1120 | gh); | |
1121 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
1122 | done = 0; | |
1123 | } | |
1124 | ||
1125 | if (signal_pending(current)) | |
1126 | error = -ERESTARTSYS; | |
1127 | } | |
1128 | ||
1129 | if (done) | |
1130 | break; | |
1131 | ||
1132 | yield(); | |
1133 | } | |
1134 | ||
9e6e0a12 SW |
1135 | kfree(gha); |
1136 | return error; | |
1137 | } | |
1138 | ||
1139 | /** | |
1140 | * gfs2_statfs_i - Do a statfs | |
1141 | * @sdp: the filesystem | |
1142 | * @sg: the sg structure | |
1143 | * | |
1144 | * Returns: errno | |
1145 | */ | |
1146 | ||
1147 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1148 | { | |
1149 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
1150 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
1151 | ||
1152 | spin_lock(&sdp->sd_statfs_spin); | |
1153 | ||
1154 | *sc = *m_sc; | |
1155 | sc->sc_total += l_sc->sc_total; | |
1156 | sc->sc_free += l_sc->sc_free; | |
1157 | sc->sc_dinodes += l_sc->sc_dinodes; | |
1158 | ||
1159 | spin_unlock(&sdp->sd_statfs_spin); | |
1160 | ||
1161 | if (sc->sc_free < 0) | |
1162 | sc->sc_free = 0; | |
1163 | if (sc->sc_free > sc->sc_total) | |
1164 | sc->sc_free = sc->sc_total; | |
1165 | if (sc->sc_dinodes < 0) | |
1166 | sc->sc_dinodes = 0; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * gfs2_statfs - Gather and return stats about the filesystem | |
1173 | * @sb: The superblock | |
1174 | * @statfsbuf: The buffer | |
1175 | * | |
1176 | * Returns: 0 on success or error code | |
1177 | */ | |
1178 | ||
1179 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | |
1180 | { | |
fc64005c | 1181 | struct super_block *sb = dentry->d_sb; |
9e6e0a12 SW |
1182 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1183 | struct gfs2_statfs_change_host sc; | |
1184 | int error; | |
1185 | ||
8339ee54 SW |
1186 | error = gfs2_rindex_update(sdp); |
1187 | if (error) | |
1188 | return error; | |
1189 | ||
9e6e0a12 SW |
1190 | if (gfs2_tune_get(sdp, gt_statfs_slow)) |
1191 | error = gfs2_statfs_slow(sdp, &sc); | |
1192 | else | |
1193 | error = gfs2_statfs_i(sdp, &sc); | |
1194 | ||
1195 | if (error) | |
1196 | return error; | |
1197 | ||
1198 | buf->f_type = GFS2_MAGIC; | |
1199 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
1200 | buf->f_blocks = sc.sc_total; | |
1201 | buf->f_bfree = sc.sc_free; | |
1202 | buf->f_bavail = sc.sc_free; | |
1203 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
1204 | buf->f_ffree = sc.sc_free; | |
1205 | buf->f_namelen = GFS2_FNAMESIZE; | |
1206 | ||
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /** | |
1211 | * gfs2_remount_fs - called when the FS is remounted | |
1212 | * @sb: the filesystem | |
1213 | * @flags: the remount flags | |
1214 | * @data: extra data passed in (not used right now) | |
1215 | * | |
1216 | * Returns: errno | |
1217 | */ | |
1218 | ||
1219 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
1220 | { | |
1221 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1222 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | |
1223 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1224 | int error; | |
1225 | ||
02b9984d TT |
1226 | sync_filesystem(sb); |
1227 | ||
9e6e0a12 | 1228 | spin_lock(>->gt_spin); |
5e687eac | 1229 | args.ar_commit = gt->gt_logd_secs; |
3d3c10f2 BM |
1230 | args.ar_quota_quantum = gt->gt_quota_quantum; |
1231 | if (gt->gt_statfs_slow) | |
1232 | args.ar_statfs_quantum = 0; | |
1233 | else | |
1234 | args.ar_statfs_quantum = gt->gt_statfs_quantum; | |
9e6e0a12 | 1235 | spin_unlock(>->gt_spin); |
f55073ff | 1236 | error = gfs2_mount_args(&args, data); |
9e6e0a12 SW |
1237 | if (error) |
1238 | return error; | |
1239 | ||
1240 | /* Not allowed to change locking details */ | |
1241 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | |
1242 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | |
1243 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | |
1244 | return -EINVAL; | |
1245 | ||
1246 | /* Some flags must not be changed */ | |
1247 | if (args_neq(&args, &sdp->sd_args, spectator) || | |
9e6e0a12 | 1248 | args_neq(&args, &sdp->sd_args, localflocks) || |
9e6e0a12 SW |
1249 | args_neq(&args, &sdp->sd_args, meta)) |
1250 | return -EINVAL; | |
1251 | ||
1252 | if (sdp->sd_args.ar_spectator) | |
1253 | *flags |= MS_RDONLY; | |
1254 | ||
1255 | if ((sb->s_flags ^ *flags) & MS_RDONLY) { | |
1256 | if (*flags & MS_RDONLY) | |
1257 | error = gfs2_make_fs_ro(sdp); | |
1258 | else | |
1259 | error = gfs2_make_fs_rw(sdp); | |
1260 | if (error) | |
1261 | return error; | |
1262 | } | |
1263 | ||
1264 | sdp->sd_args = args; | |
1265 | if (sdp->sd_args.ar_posix_acl) | |
1266 | sb->s_flags |= MS_POSIXACL; | |
1267 | else | |
1268 | sb->s_flags &= ~MS_POSIXACL; | |
f25934c5 CH |
1269 | if (sdp->sd_args.ar_nobarrier) |
1270 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
1271 | else | |
1272 | clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
9e6e0a12 | 1273 | spin_lock(>->gt_spin); |
5e687eac | 1274 | gt->gt_logd_secs = args.ar_commit; |
3d3c10f2 BM |
1275 | gt->gt_quota_quantum = args.ar_quota_quantum; |
1276 | if (args.ar_statfs_quantum) { | |
1277 | gt->gt_statfs_slow = 0; | |
1278 | gt->gt_statfs_quantum = args.ar_statfs_quantum; | |
1279 | } | |
1280 | else { | |
1281 | gt->gt_statfs_slow = 1; | |
1282 | gt->gt_statfs_quantum = 30; | |
1283 | } | |
9e6e0a12 SW |
1284 | spin_unlock(>->gt_spin); |
1285 | ||
8633ecfa | 1286 | gfs2_online_uevent(sdp); |
9e6e0a12 SW |
1287 | return 0; |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
1292 | * @inode: The inode to drop | |
1293 | * | |
1294 | * If we've received a callback on an iopen lock then its because a | |
1295 | * remote node tried to deallocate the inode but failed due to this node | |
1296 | * still having the inode open. Here we mark the link count zero | |
1297 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
1298 | * is set on the iopen glock. If we didn't do a disk read since the | |
1299 | * remote node removed the final link then we might otherwise miss | |
1300 | * this event. This check ensures that this node will deallocate the | |
1301 | * inode's blocks, or alternatively pass the baton on to another | |
1302 | * node for later deallocation. | |
1303 | */ | |
1304 | ||
45321ac5 | 1305 | static int gfs2_drop_inode(struct inode *inode) |
9e6e0a12 SW |
1306 | { |
1307 | struct gfs2_inode *ip = GFS2_I(inode); | |
1308 | ||
6df9f9a2 AG |
1309 | if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && |
1310 | inode->i_nlink && | |
1311 | gfs2_holder_initialized(&ip->i_iopen_gh)) { | |
9e6e0a12 | 1312 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
6df9f9a2 | 1313 | if (test_bit(GLF_DEMOTE, &gl->gl_flags)) |
9e6e0a12 SW |
1314 | clear_nlink(inode); |
1315 | } | |
45321ac5 | 1316 | return generic_drop_inode(inode); |
9e6e0a12 SW |
1317 | } |
1318 | ||
1319 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | |
1320 | { | |
1321 | do { | |
1322 | if (d1 == d2) | |
1323 | return 1; | |
1324 | d1 = d1->d_parent; | |
1325 | } while (!IS_ROOT(d1)); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | /** | |
1330 | * gfs2_show_options - Show mount options for /proc/mounts | |
1331 | * @s: seq_file structure | |
34c80b1d | 1332 | * @root: root of this (sub)tree |
9e6e0a12 SW |
1333 | * |
1334 | * Returns: 0 on success or error code | |
1335 | */ | |
1336 | ||
34c80b1d | 1337 | static int gfs2_show_options(struct seq_file *s, struct dentry *root) |
9e6e0a12 | 1338 | { |
34c80b1d | 1339 | struct gfs2_sbd *sdp = root->d_sb->s_fs_info; |
9e6e0a12 | 1340 | struct gfs2_args *args = &sdp->sd_args; |
3d3c10f2 | 1341 | int val; |
9e6e0a12 | 1342 | |
34c80b1d | 1343 | if (is_ancestor(root, sdp->sd_master_dir)) |
eaebdedc | 1344 | seq_puts(s, ",meta"); |
9e6e0a12 | 1345 | if (args->ar_lockproto[0]) |
a068acf2 | 1346 | seq_show_option(s, "lockproto", args->ar_lockproto); |
9e6e0a12 | 1347 | if (args->ar_locktable[0]) |
a068acf2 | 1348 | seq_show_option(s, "locktable", args->ar_locktable); |
9e6e0a12 | 1349 | if (args->ar_hostdata[0]) |
a068acf2 | 1350 | seq_show_option(s, "hostdata", args->ar_hostdata); |
9e6e0a12 | 1351 | if (args->ar_spectator) |
eaebdedc | 1352 | seq_puts(s, ",spectator"); |
9e6e0a12 | 1353 | if (args->ar_localflocks) |
eaebdedc | 1354 | seq_puts(s, ",localflocks"); |
9e6e0a12 | 1355 | if (args->ar_debug) |
eaebdedc | 1356 | seq_puts(s, ",debug"); |
9e6e0a12 | 1357 | if (args->ar_posix_acl) |
eaebdedc | 1358 | seq_puts(s, ",acl"); |
9e6e0a12 SW |
1359 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { |
1360 | char *state; | |
1361 | switch (args->ar_quota) { | |
1362 | case GFS2_QUOTA_OFF: | |
1363 | state = "off"; | |
1364 | break; | |
1365 | case GFS2_QUOTA_ACCOUNT: | |
1366 | state = "account"; | |
1367 | break; | |
1368 | case GFS2_QUOTA_ON: | |
1369 | state = "on"; | |
1370 | break; | |
1371 | default: | |
1372 | state = "unknown"; | |
1373 | break; | |
1374 | } | |
1375 | seq_printf(s, ",quota=%s", state); | |
1376 | } | |
1377 | if (args->ar_suiddir) | |
eaebdedc | 1378 | seq_puts(s, ",suiddir"); |
9e6e0a12 SW |
1379 | if (args->ar_data != GFS2_DATA_DEFAULT) { |
1380 | char *state; | |
1381 | switch (args->ar_data) { | |
1382 | case GFS2_DATA_WRITEBACK: | |
1383 | state = "writeback"; | |
1384 | break; | |
1385 | case GFS2_DATA_ORDERED: | |
1386 | state = "ordered"; | |
1387 | break; | |
1388 | default: | |
1389 | state = "unknown"; | |
1390 | break; | |
1391 | } | |
1392 | seq_printf(s, ",data=%s", state); | |
1393 | } | |
1394 | if (args->ar_discard) | |
eaebdedc | 1395 | seq_puts(s, ",discard"); |
5e687eac BM |
1396 | val = sdp->sd_tune.gt_logd_secs; |
1397 | if (val != 30) | |
3d3c10f2 BM |
1398 | seq_printf(s, ",commit=%d", val); |
1399 | val = sdp->sd_tune.gt_statfs_quantum; | |
1400 | if (val != 30) | |
1401 | seq_printf(s, ",statfs_quantum=%d", val); | |
2b9731e8 SW |
1402 | else if (sdp->sd_tune.gt_statfs_slow) |
1403 | seq_puts(s, ",statfs_quantum=0"); | |
3d3c10f2 BM |
1404 | val = sdp->sd_tune.gt_quota_quantum; |
1405 | if (val != 60) | |
1406 | seq_printf(s, ",quota_quantum=%d", val); | |
1407 | if (args->ar_statfs_percent) | |
1408 | seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); | |
d34843d0 BP |
1409 | if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
1410 | const char *state; | |
1411 | ||
1412 | switch (args->ar_errors) { | |
1413 | case GFS2_ERRORS_WITHDRAW: | |
1414 | state = "withdraw"; | |
1415 | break; | |
1416 | case GFS2_ERRORS_PANIC: | |
1417 | state = "panic"; | |
1418 | break; | |
1419 | default: | |
1420 | state = "unknown"; | |
1421 | break; | |
1422 | } | |
1423 | seq_printf(s, ",errors=%s", state); | |
1424 | } | |
cdcfde62 | 1425 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) |
eaebdedc | 1426 | seq_puts(s, ",nobarrier"); |
913a71d2 | 1427 | if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) |
eaebdedc | 1428 | seq_puts(s, ",demote_interface_used"); |
90306c41 | 1429 | if (args->ar_rgrplvb) |
eaebdedc | 1430 | seq_puts(s, ",rgrplvb"); |
471f3db2 BM |
1431 | if (args->ar_loccookie) |
1432 | seq_puts(s, ",loccookie"); | |
9e6e0a12 SW |
1433 | return 0; |
1434 | } | |
1435 | ||
f42ab085 SW |
1436 | static void gfs2_final_release_pages(struct gfs2_inode *ip) |
1437 | { | |
1438 | struct inode *inode = &ip->i_inode; | |
1439 | struct gfs2_glock *gl = ip->i_gl; | |
1440 | ||
1441 | truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); | |
1442 | truncate_inode_pages(&inode->i_data, 0); | |
1443 | ||
1444 | if (atomic_read(&gl->gl_revokes) == 0) { | |
1445 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
1446 | clear_bit(GLF_DIRTY, &gl->gl_flags); | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | static int gfs2_dinode_dealloc(struct gfs2_inode *ip) | |
1451 | { | |
1452 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
f42ab085 | 1453 | struct gfs2_rgrpd *rgd; |
564e12b1 | 1454 | struct gfs2_holder gh; |
f42ab085 SW |
1455 | int error; |
1456 | ||
1457 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { | |
94fb763b | 1458 | gfs2_consist_inode(ip); |
f42ab085 SW |
1459 | return -EIO; |
1460 | } | |
1461 | ||
8e2e0047 BP |
1462 | error = gfs2_rindex_update(sdp); |
1463 | if (error) | |
1464 | return error; | |
f42ab085 | 1465 | |
f4108a60 | 1466 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
f42ab085 | 1467 | if (error) |
5407e242 | 1468 | return error; |
f42ab085 | 1469 | |
66fc061b | 1470 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
f42ab085 SW |
1471 | if (!rgd) { |
1472 | gfs2_consist_inode(ip); | |
1473 | error = -EIO; | |
8339ee54 | 1474 | goto out_qs; |
f42ab085 SW |
1475 | } |
1476 | ||
564e12b1 | 1477 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
f42ab085 | 1478 | if (error) |
8339ee54 | 1479 | goto out_qs; |
f42ab085 | 1480 | |
4667a0ec SW |
1481 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, |
1482 | sdp->sd_jdesc->jd_blocks); | |
f42ab085 SW |
1483 | if (error) |
1484 | goto out_rg_gunlock; | |
1485 | ||
1486 | gfs2_free_di(rgd, ip); | |
1487 | ||
1488 | gfs2_final_release_pages(ip); | |
1489 | ||
1490 | gfs2_trans_end(sdp); | |
1491 | ||
1492 | out_rg_gunlock: | |
564e12b1 | 1493 | gfs2_glock_dq_uninit(&gh); |
f42ab085 SW |
1494 | out_qs: |
1495 | gfs2_quota_unhold(ip); | |
f42ab085 SW |
1496 | return error; |
1497 | } | |
1498 | ||
380f7c65 SW |
1499 | /** |
1500 | * gfs2_evict_inode - Remove an inode from cache | |
1501 | * @inode: The inode to evict | |
1502 | * | |
1503 | * There are three cases to consider: | |
1504 | * 1. i_nlink == 0, we are final opener (and must deallocate) | |
1505 | * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) | |
1506 | * 3. i_nlink > 0 | |
1507 | * | |
1508 | * If the fs is read only, then we have to treat all cases as per #3 | |
1509 | * since we are unable to do any deallocation. The inode will be | |
1510 | * deallocated by the next read/write node to attempt an allocation | |
1511 | * in the same resource group | |
1512 | * | |
9e6e0a12 SW |
1513 | * We have to (at the moment) hold the inodes main lock to cover |
1514 | * the gap between unlocking the shared lock on the iopen lock and | |
1515 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
1516 | * conversion on the iopen lock, but we can change that later. This | |
1517 | * is safe, just less efficient. | |
1518 | */ | |
1519 | ||
d5c1515c | 1520 | static void gfs2_evict_inode(struct inode *inode) |
9e6e0a12 | 1521 | { |
001e8e8d SW |
1522 | struct super_block *sb = inode->i_sb; |
1523 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
9e6e0a12 SW |
1524 | struct gfs2_inode *ip = GFS2_I(inode); |
1525 | struct gfs2_holder gh; | |
ee530bea | 1526 | struct address_space *metamapping; |
9e6e0a12 SW |
1527 | int error; |
1528 | ||
05978803 AD |
1529 | if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { |
1530 | clear_inode(inode); | |
1531 | return; | |
1532 | } | |
1533 | ||
001e8e8d | 1534 | if (inode->i_nlink || (sb->s_flags & MS_RDONLY)) |
d5c1515c AV |
1535 | goto out; |
1536 | ||
44ad37d6 BP |
1537 | /* Must not read inode block until block type has been verified */ |
1538 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); | |
9e6e0a12 | 1539 | if (unlikely(error)) { |
a6a4d98b | 1540 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
86d067a7 BP |
1541 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
1542 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
9e6e0a12 SW |
1543 | goto out; |
1544 | } | |
1545 | ||
40ac218f SW |
1546 | if (!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { |
1547 | error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); | |
1548 | if (error) | |
1549 | goto out_truncate; | |
1550 | } | |
acf7e244 | 1551 | |
44ad37d6 BP |
1552 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
1553 | error = gfs2_inode_refresh(ip); | |
1554 | if (error) | |
1555 | goto out_truncate; | |
1556 | } | |
1557 | ||
6df9f9a2 | 1558 | if (gfs2_holder_initialized(&ip->i_iopen_gh) && |
7508abc4 BP |
1559 | test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
1560 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; | |
1561 | gfs2_glock_dq_wait(&ip->i_iopen_gh); | |
1562 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, | |
1563 | &ip->i_iopen_gh); | |
1564 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
1565 | if (error) | |
1566 | goto out_truncate; | |
1567 | } | |
9e6e0a12 | 1568 | |
380f7c65 SW |
1569 | /* Case 1 starts here */ |
1570 | ||
9e6e0a12 SW |
1571 | if (S_ISDIR(inode->i_mode) && |
1572 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | |
1573 | error = gfs2_dir_exhash_dealloc(ip); | |
1574 | if (error) | |
1575 | goto out_unlock; | |
1576 | } | |
1577 | ||
1578 | if (ip->i_eattr) { | |
1579 | error = gfs2_ea_dealloc(ip); | |
1580 | if (error) | |
1581 | goto out_unlock; | |
1582 | } | |
1583 | ||
1584 | if (!gfs2_is_stuffed(ip)) { | |
1585 | error = gfs2_file_dealloc(ip); | |
1586 | if (error) | |
1587 | goto out_unlock; | |
1588 | } | |
1589 | ||
1590 | error = gfs2_dinode_dealloc(ip); | |
f42ab085 | 1591 | goto out_unlock; |
9e6e0a12 SW |
1592 | |
1593 | out_truncate: | |
24972557 | 1594 | gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH); |
ee530bea | 1595 | metamapping = gfs2_glock2aspace(ip->i_gl); |
2216db70 | 1596 | if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { |
2216db70 BM |
1597 | filemap_fdatawrite(metamapping); |
1598 | filemap_fdatawait(metamapping); | |
1599 | } | |
40ac218f | 1600 | write_inode_now(inode, 1); |
b5b24d7a | 1601 | gfs2_ail_flush(ip->i_gl, 0); |
40ac218f | 1602 | |
380f7c65 | 1603 | /* Case 2 starts here */ |
9e6e0a12 SW |
1604 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
1605 | if (error) | |
1606 | goto out_unlock; | |
380f7c65 SW |
1607 | /* Needs to be done before glock release & also in a transaction */ |
1608 | truncate_inode_pages(&inode->i_data, 0); | |
ee530bea | 1609 | truncate_inode_pages(metamapping, 0); |
9e6e0a12 SW |
1610 | gfs2_trans_end(sdp); |
1611 | ||
1612 | out_unlock: | |
380f7c65 | 1613 | /* Error path for case 1 */ |
a097dc7e BP |
1614 | if (gfs2_rs_active(&ip->i_res)) |
1615 | gfs2_rs_deltree(&ip->i_res); | |
8e2e0047 | 1616 | |
6df9f9a2 | 1617 | if (gfs2_holder_initialized(&ip->i_iopen_gh)) { |
7508abc4 BP |
1618 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
1619 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; | |
1620 | gfs2_glock_dq_wait(&ip->i_iopen_gh); | |
1621 | } | |
1622 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
a6a4d98b | 1623 | } |
9e6e0a12 SW |
1624 | gfs2_glock_dq_uninit(&gh); |
1625 | if (error && error != GLR_TRYFAILED && error != -EROFS) | |
d5c1515c | 1626 | fs_warn(sdp, "gfs2_evict_inode: %d\n", error); |
9e6e0a12 | 1627 | out: |
380f7c65 | 1628 | /* Case 3 starts here */ |
91b0abe3 | 1629 | truncate_inode_pages_final(&inode->i_data); |
b54e9a0b | 1630 | gfs2_rsqa_delete(ip, NULL); |
45138990 | 1631 | gfs2_ordered_del_inode(ip); |
dbd5768f | 1632 | clear_inode(inode); |
17d539f0 | 1633 | gfs2_dir_hash_inval(ip); |
d5c1515c | 1634 | ip->i_gl->gl_object = NULL; |
43829731 | 1635 | flush_delayed_work(&ip->i_gl->gl_work); |
29687a2a | 1636 | gfs2_glock_add_to_lru(ip->i_gl); |
d5c1515c AV |
1637 | gfs2_glock_put(ip->i_gl); |
1638 | ip->i_gl = NULL; | |
6df9f9a2 | 1639 | if (gfs2_holder_initialized(&ip->i_iopen_gh)) { |
d5c1515c | 1640 | ip->i_iopen_gh.gh_gl->gl_object = NULL; |
a6a4d98b | 1641 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
86d067a7 BP |
1642 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
1643 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
d5c1515c | 1644 | } |
9e6e0a12 SW |
1645 | } |
1646 | ||
1647 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | |
1648 | { | |
1649 | struct gfs2_inode *ip; | |
1650 | ||
1651 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
1652 | if (ip) { | |
1653 | ip->i_flags = 0; | |
1654 | ip->i_gl = NULL; | |
54335b1f | 1655 | ip->i_rgd = NULL; |
a097dc7e BP |
1656 | memset(&ip->i_res, 0, sizeof(ip->i_res)); |
1657 | RB_CLEAR_NODE(&ip->i_res.rs_node); | |
c8d57703 | 1658 | ip->i_rahead = 0; |
9e6e0a12 SW |
1659 | } |
1660 | return &ip->i_inode; | |
1661 | } | |
1662 | ||
fa0d7e3d | 1663 | static void gfs2_i_callback(struct rcu_head *head) |
9e6e0a12 | 1664 | { |
fa0d7e3d | 1665 | struct inode *inode = container_of(head, struct inode, i_rcu); |
9e6e0a12 SW |
1666 | kmem_cache_free(gfs2_inode_cachep, inode); |
1667 | } | |
1668 | ||
fa0d7e3d NP |
1669 | static void gfs2_destroy_inode(struct inode *inode) |
1670 | { | |
1671 | call_rcu(&inode->i_rcu, gfs2_i_callback); | |
1672 | } | |
1673 | ||
9e6e0a12 SW |
1674 | const struct super_operations gfs2_super_ops = { |
1675 | .alloc_inode = gfs2_alloc_inode, | |
1676 | .destroy_inode = gfs2_destroy_inode, | |
1677 | .write_inode = gfs2_write_inode, | |
ab9bbda0 | 1678 | .dirty_inode = gfs2_dirty_inode, |
d5c1515c | 1679 | .evict_inode = gfs2_evict_inode, |
9e6e0a12 | 1680 | .put_super = gfs2_put_super, |
9e6e0a12 | 1681 | .sync_fs = gfs2_sync_fs, |
2e60d768 BM |
1682 | .freeze_super = gfs2_freeze, |
1683 | .thaw_super = gfs2_unfreeze, | |
9e6e0a12 SW |
1684 | .statfs = gfs2_statfs, |
1685 | .remount_fs = gfs2_remount_fs, | |
9e6e0a12 SW |
1686 | .drop_inode = gfs2_drop_inode, |
1687 | .show_options = gfs2_show_options, | |
1688 | }; | |
1689 |