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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 | 756 | int ret = 0; |
adbc3ddf | 757 | bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip)); |
ab9bbda0 | 758 | |
adbc3ddf | 759 | if (flush_all) |
24972557 | 760 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH); |
a88a341a | 761 | if (bdi->wb.dirty_exceeded) |
4667a0ec | 762 | gfs2_ail1_flush(sdp, wbc); |
1d4ec642 SW |
763 | else |
764 | filemap_fdatawrite(metamapping); | |
adbc3ddf | 765 | if (flush_all) |
1027efaa SW |
766 | ret = filemap_fdatawait(metamapping); |
767 | if (ret) | |
768 | mark_inode_dirty_sync(inode); | |
9e6e0a12 SW |
769 | return ret; |
770 | } | |
771 | ||
ab9bbda0 SW |
772 | /** |
773 | * gfs2_dirty_inode - check for atime updates | |
774 | * @inode: The inode in question | |
775 | * @flags: The type of dirty | |
776 | * | |
777 | * Unfortunately it can be called under any combination of inode | |
778 | * glock and transaction lock, so we have to check carefully. | |
779 | * | |
780 | * At the moment this deals only with atime - it should be possible | |
781 | * to expand that role in future, once a review of the locking has | |
782 | * been carried out. | |
783 | */ | |
784 | ||
785 | static void gfs2_dirty_inode(struct inode *inode, int flags) | |
786 | { | |
787 | struct gfs2_inode *ip = GFS2_I(inode); | |
788 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
789 | struct buffer_head *bh; | |
790 | struct gfs2_holder gh; | |
791 | int need_unlock = 0; | |
792 | int need_endtrans = 0; | |
793 | int ret; | |
794 | ||
795 | if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC))) | |
796 | return; | |
0d1c7ae9 BP |
797 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
798 | return; | |
ab9bbda0 SW |
799 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
800 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
801 | if (ret) { | |
802 | fs_err(sdp, "dirty_inode: glock %d\n", ret); | |
803 | return; | |
804 | } | |
805 | need_unlock = 1; | |
3d162688 BM |
806 | } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) |
807 | return; | |
ab9bbda0 SW |
808 | |
809 | if (current->journal_info == NULL) { | |
810 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
811 | if (ret) { | |
812 | fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); | |
813 | goto out; | |
814 | } | |
815 | need_endtrans = 1; | |
816 | } | |
817 | ||
818 | ret = gfs2_meta_inode_buffer(ip, &bh); | |
819 | if (ret == 0) { | |
350a9b0a | 820 | gfs2_trans_add_meta(ip->i_gl, bh); |
ab9bbda0 SW |
821 | gfs2_dinode_out(ip, bh->b_data); |
822 | brelse(bh); | |
823 | } | |
824 | ||
825 | if (need_endtrans) | |
826 | gfs2_trans_end(sdp); | |
827 | out: | |
828 | if (need_unlock) | |
829 | gfs2_glock_dq_uninit(&gh); | |
830 | } | |
831 | ||
9e6e0a12 SW |
832 | /** |
833 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
834 | * @sdp: the filesystem | |
835 | * | |
836 | * Returns: errno | |
837 | */ | |
838 | ||
839 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
840 | { | |
2e60d768 | 841 | struct gfs2_holder freeze_gh; |
9e6e0a12 SW |
842 | int error; |
843 | ||
24972557 | 844 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, |
2e60d768 | 845 | &freeze_gh); |
24972557 BM |
846 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
847 | return error; | |
848 | ||
8ad151c2 SW |
849 | kthread_stop(sdp->sd_quotad_process); |
850 | kthread_stop(sdp->sd_logd_process); | |
851 | ||
b94a170e | 852 | flush_workqueue(gfs2_delete_workqueue); |
ceed1723 | 853 | gfs2_quota_sync(sdp->sd_vfs, 0); |
8c42d637 | 854 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
9e6e0a12 | 855 | |
24972557 | 856 | gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH); |
2e60d768 | 857 | wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0); |
24972557 | 858 | gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); |
9e6e0a12 | 859 | |
6df9f9a2 | 860 | if (gfs2_holder_initialized(&freeze_gh)) |
2e60d768 | 861 | gfs2_glock_dq_uninit(&freeze_gh); |
9e6e0a12 SW |
862 | |
863 | gfs2_quota_cleanup(sdp); | |
864 | ||
865 | return error; | |
866 | } | |
867 | ||
9e6e0a12 SW |
868 | /** |
869 | * gfs2_put_super - Unmount the filesystem | |
870 | * @sb: The VFS superblock | |
871 | * | |
872 | */ | |
873 | ||
874 | static void gfs2_put_super(struct super_block *sb) | |
875 | { | |
876 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
877 | int error; | |
878 | struct gfs2_jdesc *jd; | |
879 | ||
9e6e0a12 SW |
880 | /* No more recovery requests */ |
881 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); | |
882 | smp_mb(); | |
883 | ||
884 | /* Wait on outstanding recovery */ | |
885 | restart: | |
886 | spin_lock(&sdp->sd_jindex_spin); | |
887 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
888 | if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) | |
889 | continue; | |
890 | spin_unlock(&sdp->sd_jindex_spin); | |
891 | wait_on_bit(&jd->jd_flags, JDF_RECOVERY, | |
74316201 | 892 | TASK_UNINTERRUPTIBLE); |
9e6e0a12 SW |
893 | goto restart; |
894 | } | |
895 | spin_unlock(&sdp->sd_jindex_spin); | |
896 | ||
bc98a42c | 897 | if (!sb_rdonly(sb)) { |
9e6e0a12 SW |
898 | error = gfs2_make_fs_ro(sdp); |
899 | if (error) | |
900 | gfs2_io_error(sdp); | |
901 | } | |
902 | /* At this point, we're through modifying the disk */ | |
903 | ||
904 | /* Release stuff */ | |
905 | ||
906 | iput(sdp->sd_jindex); | |
9e6e0a12 SW |
907 | iput(sdp->sd_statfs_inode); |
908 | iput(sdp->sd_rindex); | |
909 | iput(sdp->sd_quota_inode); | |
910 | ||
911 | gfs2_glock_put(sdp->sd_rename_gl); | |
24972557 | 912 | gfs2_glock_put(sdp->sd_freeze_gl); |
9e6e0a12 SW |
913 | |
914 | if (!sdp->sd_args.ar_spectator) { | |
915 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
916 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
9e6e0a12 SW |
917 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
918 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | |
9e6e0a12 SW |
919 | iput(sdp->sd_sc_inode); |
920 | iput(sdp->sd_qc_inode); | |
921 | } | |
922 | ||
923 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | |
924 | gfs2_clear_rgrpd(sdp); | |
925 | gfs2_jindex_free(sdp); | |
926 | /* Take apart glock structures and buffer lists */ | |
927 | gfs2_gl_hash_clear(sdp); | |
b2fb7dab | 928 | gfs2_delete_debugfs_file(sdp); |
9e6e0a12 SW |
929 | /* Unmount the locking protocol */ |
930 | gfs2_lm_unmount(sdp); | |
931 | ||
932 | /* At this point, we're through participating in the lockspace */ | |
933 | gfs2_sys_fs_del(sdp); | |
934 | } | |
935 | ||
9e6e0a12 SW |
936 | /** |
937 | * gfs2_sync_fs - sync the filesystem | |
938 | * @sb: the superblock | |
939 | * | |
940 | * Flushes the log to disk. | |
941 | */ | |
942 | ||
943 | static int gfs2_sync_fs(struct super_block *sb, int wait) | |
944 | { | |
1027efaa | 945 | struct gfs2_sbd *sdp = sb->s_fs_info; |
a1177825 JK |
946 | |
947 | gfs2_quota_sync(sb, -1); | |
942b0cdd | 948 | if (wait) |
24972557 | 949 | gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); |
942b0cdd | 950 | return sdp->sd_log_error; |
9e6e0a12 SW |
951 | } |
952 | ||
2e60d768 BM |
953 | void gfs2_freeze_func(struct work_struct *work) |
954 | { | |
955 | int error; | |
956 | struct gfs2_holder freeze_gh; | |
957 | struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); | |
958 | struct super_block *sb = sdp->sd_vfs; | |
959 | ||
960 | atomic_inc(&sb->s_active); | |
961 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, | |
962 | &freeze_gh); | |
963 | if (error) { | |
964 | printk(KERN_INFO "GFS2: couln't get freeze lock : %d\n", error); | |
965 | gfs2_assert_withdraw(sdp, 0); | |
966 | } | |
967 | else { | |
968 | atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); | |
969 | error = thaw_super(sb); | |
970 | if (error) { | |
971 | printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n", | |
972 | error); | |
973 | gfs2_assert_withdraw(sdp, 0); | |
974 | } | |
975 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) | |
976 | freeze_gh.gh_flags |= GL_NOCACHE; | |
977 | gfs2_glock_dq_uninit(&freeze_gh); | |
978 | } | |
979 | deactivate_super(sb); | |
980 | return; | |
981 | } | |
982 | ||
9e6e0a12 SW |
983 | /** |
984 | * gfs2_freeze - prevent further writes to the filesystem | |
985 | * @sb: the VFS structure for the filesystem | |
986 | * | |
987 | */ | |
988 | ||
989 | static int gfs2_freeze(struct super_block *sb) | |
990 | { | |
991 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
2e60d768 | 992 | int error = 0; |
9e6e0a12 | 993 | |
2e60d768 BM |
994 | mutex_lock(&sdp->sd_freeze_mutex); |
995 | if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) | |
996 | goto out; | |
997 | ||
998 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { | |
999 | error = -EINVAL; | |
1000 | goto out; | |
1001 | } | |
9e6e0a12 SW |
1002 | |
1003 | for (;;) { | |
d564053f | 1004 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); |
9e6e0a12 SW |
1005 | if (!error) |
1006 | break; | |
1007 | ||
1008 | switch (error) { | |
1009 | case -EBUSY: | |
1010 | fs_err(sdp, "waiting for recovery before freeze\n"); | |
1011 | break; | |
1012 | ||
1013 | default: | |
1014 | fs_err(sdp, "error freezing FS: %d\n", error); | |
1015 | break; | |
1016 | } | |
1017 | ||
1018 | fs_err(sdp, "retrying...\n"); | |
1019 | msleep(1000); | |
1020 | } | |
2e60d768 BM |
1021 | error = 0; |
1022 | out: | |
1023 | mutex_unlock(&sdp->sd_freeze_mutex); | |
1024 | return error; | |
9e6e0a12 SW |
1025 | } |
1026 | ||
1027 | /** | |
1028 | * gfs2_unfreeze - reallow writes to the filesystem | |
1029 | * @sb: the VFS structure for the filesystem | |
1030 | * | |
1031 | */ | |
1032 | ||
1033 | static int gfs2_unfreeze(struct super_block *sb) | |
1034 | { | |
d564053f SW |
1035 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1036 | ||
2e60d768 BM |
1037 | mutex_lock(&sdp->sd_freeze_mutex); |
1038 | if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || | |
6df9f9a2 | 1039 | !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { |
2e60d768 BM |
1040 | mutex_unlock(&sdp->sd_freeze_mutex); |
1041 | return 0; | |
1042 | } | |
1043 | ||
d564053f | 1044 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); |
2e60d768 | 1045 | mutex_unlock(&sdp->sd_freeze_mutex); |
9e6e0a12 SW |
1046 | return 0; |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * statfs_fill - fill in the sg for a given RG | |
1051 | * @rgd: the RG | |
1052 | * @sc: the sc structure | |
1053 | * | |
1054 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
1055 | */ | |
1056 | ||
1057 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
1058 | struct gfs2_statfs_change_host *sc) | |
1059 | { | |
1060 | gfs2_rgrp_verify(rgd); | |
1061 | sc->sc_total += rgd->rd_data; | |
1062 | sc->sc_free += rgd->rd_free; | |
1063 | sc->sc_dinodes += rgd->rd_dinodes; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | /** | |
1068 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
1069 | * @sdp: the filesystem | |
1070 | * @sc: the sc info that will be returned | |
1071 | * | |
1072 | * Any error (other than a signal) will cause this routine to fall back | |
1073 | * to the synchronous version. | |
1074 | * | |
1075 | * FIXME: This really shouldn't busy wait like this. | |
1076 | * | |
1077 | * Returns: errno | |
1078 | */ | |
1079 | ||
1080 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1081 | { | |
9e6e0a12 SW |
1082 | struct gfs2_rgrpd *rgd_next; |
1083 | struct gfs2_holder *gha, *gh; | |
1084 | unsigned int slots = 64; | |
1085 | unsigned int x; | |
1086 | int done; | |
1087 | int error = 0, err; | |
1088 | ||
1089 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
6df9f9a2 | 1090 | gha = kmalloc(slots * sizeof(struct gfs2_holder), GFP_KERNEL); |
9e6e0a12 SW |
1091 | if (!gha) |
1092 | return -ENOMEM; | |
6df9f9a2 AG |
1093 | for (x = 0; x < slots; x++) |
1094 | gfs2_holder_mark_uninitialized(gha + x); | |
9e6e0a12 | 1095 | |
9e6e0a12 SW |
1096 | rgd_next = gfs2_rgrpd_get_first(sdp); |
1097 | ||
1098 | for (;;) { | |
1099 | done = 1; | |
1100 | ||
1101 | for (x = 0; x < slots; x++) { | |
1102 | gh = gha + x; | |
1103 | ||
6df9f9a2 | 1104 | if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) { |
9e6e0a12 SW |
1105 | err = gfs2_glock_wait(gh); |
1106 | if (err) { | |
1107 | gfs2_holder_uninit(gh); | |
1108 | error = err; | |
1109 | } else { | |
6f6597ba AG |
1110 | if (!error) { |
1111 | struct gfs2_rgrpd *rgd = | |
1112 | gfs2_glock2rgrp(gh->gh_gl); | |
1113 | ||
1114 | error = statfs_slow_fill(rgd, sc); | |
1115 | } | |
9e6e0a12 SW |
1116 | gfs2_glock_dq_uninit(gh); |
1117 | } | |
1118 | } | |
1119 | ||
6df9f9a2 | 1120 | if (gfs2_holder_initialized(gh)) |
9e6e0a12 SW |
1121 | done = 0; |
1122 | else if (rgd_next && !error) { | |
1123 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
1124 | LM_ST_SHARED, | |
1125 | GL_ASYNC, | |
1126 | gh); | |
1127 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
1128 | done = 0; | |
1129 | } | |
1130 | ||
1131 | if (signal_pending(current)) | |
1132 | error = -ERESTARTSYS; | |
1133 | } | |
1134 | ||
1135 | if (done) | |
1136 | break; | |
1137 | ||
1138 | yield(); | |
1139 | } | |
1140 | ||
9e6e0a12 SW |
1141 | kfree(gha); |
1142 | return error; | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * gfs2_statfs_i - Do a statfs | |
1147 | * @sdp: the filesystem | |
1148 | * @sg: the sg structure | |
1149 | * | |
1150 | * Returns: errno | |
1151 | */ | |
1152 | ||
1153 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1154 | { | |
1155 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
1156 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
1157 | ||
1158 | spin_lock(&sdp->sd_statfs_spin); | |
1159 | ||
1160 | *sc = *m_sc; | |
1161 | sc->sc_total += l_sc->sc_total; | |
1162 | sc->sc_free += l_sc->sc_free; | |
1163 | sc->sc_dinodes += l_sc->sc_dinodes; | |
1164 | ||
1165 | spin_unlock(&sdp->sd_statfs_spin); | |
1166 | ||
1167 | if (sc->sc_free < 0) | |
1168 | sc->sc_free = 0; | |
1169 | if (sc->sc_free > sc->sc_total) | |
1170 | sc->sc_free = sc->sc_total; | |
1171 | if (sc->sc_dinodes < 0) | |
1172 | sc->sc_dinodes = 0; | |
1173 | ||
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | /** | |
1178 | * gfs2_statfs - Gather and return stats about the filesystem | |
1179 | * @sb: The superblock | |
1180 | * @statfsbuf: The buffer | |
1181 | * | |
1182 | * Returns: 0 on success or error code | |
1183 | */ | |
1184 | ||
1185 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | |
1186 | { | |
fc64005c | 1187 | struct super_block *sb = dentry->d_sb; |
9e6e0a12 SW |
1188 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1189 | struct gfs2_statfs_change_host sc; | |
1190 | int error; | |
1191 | ||
8339ee54 SW |
1192 | error = gfs2_rindex_update(sdp); |
1193 | if (error) | |
1194 | return error; | |
1195 | ||
9e6e0a12 SW |
1196 | if (gfs2_tune_get(sdp, gt_statfs_slow)) |
1197 | error = gfs2_statfs_slow(sdp, &sc); | |
1198 | else | |
1199 | error = gfs2_statfs_i(sdp, &sc); | |
1200 | ||
1201 | if (error) | |
1202 | return error; | |
1203 | ||
1204 | buf->f_type = GFS2_MAGIC; | |
1205 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
1206 | buf->f_blocks = sc.sc_total; | |
1207 | buf->f_bfree = sc.sc_free; | |
1208 | buf->f_bavail = sc.sc_free; | |
1209 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
1210 | buf->f_ffree = sc.sc_free; | |
1211 | buf->f_namelen = GFS2_FNAMESIZE; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * gfs2_remount_fs - called when the FS is remounted | |
1218 | * @sb: the filesystem | |
1219 | * @flags: the remount flags | |
1220 | * @data: extra data passed in (not used right now) | |
1221 | * | |
1222 | * Returns: errno | |
1223 | */ | |
1224 | ||
1225 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
1226 | { | |
1227 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1228 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | |
1229 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1230 | int error; | |
1231 | ||
02b9984d TT |
1232 | sync_filesystem(sb); |
1233 | ||
9e6e0a12 | 1234 | spin_lock(>->gt_spin); |
5e687eac | 1235 | args.ar_commit = gt->gt_logd_secs; |
3d3c10f2 BM |
1236 | args.ar_quota_quantum = gt->gt_quota_quantum; |
1237 | if (gt->gt_statfs_slow) | |
1238 | args.ar_statfs_quantum = 0; | |
1239 | else | |
1240 | args.ar_statfs_quantum = gt->gt_statfs_quantum; | |
9e6e0a12 | 1241 | spin_unlock(>->gt_spin); |
f55073ff | 1242 | error = gfs2_mount_args(&args, data); |
9e6e0a12 SW |
1243 | if (error) |
1244 | return error; | |
1245 | ||
1246 | /* Not allowed to change locking details */ | |
1247 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | |
1248 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | |
1249 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | |
1250 | return -EINVAL; | |
1251 | ||
1252 | /* Some flags must not be changed */ | |
1253 | if (args_neq(&args, &sdp->sd_args, spectator) || | |
9e6e0a12 | 1254 | args_neq(&args, &sdp->sd_args, localflocks) || |
9e6e0a12 SW |
1255 | args_neq(&args, &sdp->sd_args, meta)) |
1256 | return -EINVAL; | |
1257 | ||
1258 | if (sdp->sd_args.ar_spectator) | |
1751e8a6 | 1259 | *flags |= SB_RDONLY; |
9e6e0a12 | 1260 | |
1751e8a6 LT |
1261 | if ((sb->s_flags ^ *flags) & SB_RDONLY) { |
1262 | if (*flags & SB_RDONLY) | |
9e6e0a12 SW |
1263 | error = gfs2_make_fs_ro(sdp); |
1264 | else | |
1265 | error = gfs2_make_fs_rw(sdp); | |
1266 | if (error) | |
1267 | return error; | |
1268 | } | |
1269 | ||
1270 | sdp->sd_args = args; | |
1271 | if (sdp->sd_args.ar_posix_acl) | |
1751e8a6 | 1272 | sb->s_flags |= SB_POSIXACL; |
9e6e0a12 | 1273 | else |
1751e8a6 | 1274 | sb->s_flags &= ~SB_POSIXACL; |
f25934c5 CH |
1275 | if (sdp->sd_args.ar_nobarrier) |
1276 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
1277 | else | |
1278 | clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
9e6e0a12 | 1279 | spin_lock(>->gt_spin); |
5e687eac | 1280 | gt->gt_logd_secs = args.ar_commit; |
3d3c10f2 BM |
1281 | gt->gt_quota_quantum = args.ar_quota_quantum; |
1282 | if (args.ar_statfs_quantum) { | |
1283 | gt->gt_statfs_slow = 0; | |
1284 | gt->gt_statfs_quantum = args.ar_statfs_quantum; | |
1285 | } | |
1286 | else { | |
1287 | gt->gt_statfs_slow = 1; | |
1288 | gt->gt_statfs_quantum = 30; | |
1289 | } | |
9e6e0a12 SW |
1290 | spin_unlock(>->gt_spin); |
1291 | ||
8633ecfa | 1292 | gfs2_online_uevent(sdp); |
9e6e0a12 SW |
1293 | return 0; |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
1298 | * @inode: The inode to drop | |
1299 | * | |
61b91cfd | 1300 | * If we've received a callback on an iopen lock then it's because a |
9e6e0a12 SW |
1301 | * remote node tried to deallocate the inode but failed due to this node |
1302 | * still having the inode open. Here we mark the link count zero | |
1303 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
1304 | * is set on the iopen glock. If we didn't do a disk read since the | |
1305 | * remote node removed the final link then we might otherwise miss | |
1306 | * this event. This check ensures that this node will deallocate the | |
1307 | * inode's blocks, or alternatively pass the baton on to another | |
1308 | * node for later deallocation. | |
1309 | */ | |
1310 | ||
45321ac5 | 1311 | static int gfs2_drop_inode(struct inode *inode) |
9e6e0a12 SW |
1312 | { |
1313 | struct gfs2_inode *ip = GFS2_I(inode); | |
1314 | ||
6df9f9a2 AG |
1315 | if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && |
1316 | inode->i_nlink && | |
1317 | gfs2_holder_initialized(&ip->i_iopen_gh)) { | |
9e6e0a12 | 1318 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
6df9f9a2 | 1319 | if (test_bit(GLF_DEMOTE, &gl->gl_flags)) |
9e6e0a12 SW |
1320 | clear_nlink(inode); |
1321 | } | |
6a1c8f6d AG |
1322 | |
1323 | /* | |
1324 | * When under memory pressure when an inode's link count has dropped to | |
1325 | * zero, defer deleting the inode to the delete workqueue. This avoids | |
1326 | * calling into DLM under memory pressure, which can deadlock. | |
1327 | */ | |
1328 | if (!inode->i_nlink && | |
1329 | unlikely(current->flags & PF_MEMALLOC) && | |
1330 | gfs2_holder_initialized(&ip->i_iopen_gh)) { | |
1331 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; | |
1332 | ||
1333 | gfs2_glock_hold(gl); | |
1334 | if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) | |
1335 | gfs2_glock_queue_put(gl); | |
1336 | return false; | |
1337 | } | |
1338 | ||
45321ac5 | 1339 | return generic_drop_inode(inode); |
9e6e0a12 SW |
1340 | } |
1341 | ||
1342 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | |
1343 | { | |
1344 | do { | |
1345 | if (d1 == d2) | |
1346 | return 1; | |
1347 | d1 = d1->d_parent; | |
1348 | } while (!IS_ROOT(d1)); | |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * gfs2_show_options - Show mount options for /proc/mounts | |
1354 | * @s: seq_file structure | |
34c80b1d | 1355 | * @root: root of this (sub)tree |
9e6e0a12 SW |
1356 | * |
1357 | * Returns: 0 on success or error code | |
1358 | */ | |
1359 | ||
34c80b1d | 1360 | static int gfs2_show_options(struct seq_file *s, struct dentry *root) |
9e6e0a12 | 1361 | { |
34c80b1d | 1362 | struct gfs2_sbd *sdp = root->d_sb->s_fs_info; |
9e6e0a12 | 1363 | struct gfs2_args *args = &sdp->sd_args; |
3d3c10f2 | 1364 | int val; |
9e6e0a12 | 1365 | |
34c80b1d | 1366 | if (is_ancestor(root, sdp->sd_master_dir)) |
eaebdedc | 1367 | seq_puts(s, ",meta"); |
9e6e0a12 | 1368 | if (args->ar_lockproto[0]) |
a068acf2 | 1369 | seq_show_option(s, "lockproto", args->ar_lockproto); |
9e6e0a12 | 1370 | if (args->ar_locktable[0]) |
a068acf2 | 1371 | seq_show_option(s, "locktable", args->ar_locktable); |
9e6e0a12 | 1372 | if (args->ar_hostdata[0]) |
a068acf2 | 1373 | seq_show_option(s, "hostdata", args->ar_hostdata); |
9e6e0a12 | 1374 | if (args->ar_spectator) |
eaebdedc | 1375 | seq_puts(s, ",spectator"); |
9e6e0a12 | 1376 | if (args->ar_localflocks) |
eaebdedc | 1377 | seq_puts(s, ",localflocks"); |
9e6e0a12 | 1378 | if (args->ar_debug) |
eaebdedc | 1379 | seq_puts(s, ",debug"); |
9e6e0a12 | 1380 | if (args->ar_posix_acl) |
eaebdedc | 1381 | seq_puts(s, ",acl"); |
9e6e0a12 SW |
1382 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { |
1383 | char *state; | |
1384 | switch (args->ar_quota) { | |
1385 | case GFS2_QUOTA_OFF: | |
1386 | state = "off"; | |
1387 | break; | |
1388 | case GFS2_QUOTA_ACCOUNT: | |
1389 | state = "account"; | |
1390 | break; | |
1391 | case GFS2_QUOTA_ON: | |
1392 | state = "on"; | |
1393 | break; | |
1394 | default: | |
1395 | state = "unknown"; | |
1396 | break; | |
1397 | } | |
1398 | seq_printf(s, ",quota=%s", state); | |
1399 | } | |
1400 | if (args->ar_suiddir) | |
eaebdedc | 1401 | seq_puts(s, ",suiddir"); |
9e6e0a12 SW |
1402 | if (args->ar_data != GFS2_DATA_DEFAULT) { |
1403 | char *state; | |
1404 | switch (args->ar_data) { | |
1405 | case GFS2_DATA_WRITEBACK: | |
1406 | state = "writeback"; | |
1407 | break; | |
1408 | case GFS2_DATA_ORDERED: | |
1409 | state = "ordered"; | |
1410 | break; | |
1411 | default: | |
1412 | state = "unknown"; | |
1413 | break; | |
1414 | } | |
1415 | seq_printf(s, ",data=%s", state); | |
1416 | } | |
1417 | if (args->ar_discard) | |
eaebdedc | 1418 | seq_puts(s, ",discard"); |
5e687eac BM |
1419 | val = sdp->sd_tune.gt_logd_secs; |
1420 | if (val != 30) | |
3d3c10f2 BM |
1421 | seq_printf(s, ",commit=%d", val); |
1422 | val = sdp->sd_tune.gt_statfs_quantum; | |
1423 | if (val != 30) | |
1424 | seq_printf(s, ",statfs_quantum=%d", val); | |
2b9731e8 SW |
1425 | else if (sdp->sd_tune.gt_statfs_slow) |
1426 | seq_puts(s, ",statfs_quantum=0"); | |
3d3c10f2 BM |
1427 | val = sdp->sd_tune.gt_quota_quantum; |
1428 | if (val != 60) | |
1429 | seq_printf(s, ",quota_quantum=%d", val); | |
1430 | if (args->ar_statfs_percent) | |
1431 | seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); | |
d34843d0 BP |
1432 | if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
1433 | const char *state; | |
1434 | ||
1435 | switch (args->ar_errors) { | |
1436 | case GFS2_ERRORS_WITHDRAW: | |
1437 | state = "withdraw"; | |
1438 | break; | |
1439 | case GFS2_ERRORS_PANIC: | |
1440 | state = "panic"; | |
1441 | break; | |
1442 | default: | |
1443 | state = "unknown"; | |
1444 | break; | |
1445 | } | |
1446 | seq_printf(s, ",errors=%s", state); | |
1447 | } | |
cdcfde62 | 1448 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) |
eaebdedc | 1449 | seq_puts(s, ",nobarrier"); |
913a71d2 | 1450 | if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) |
eaebdedc | 1451 | seq_puts(s, ",demote_interface_used"); |
90306c41 | 1452 | if (args->ar_rgrplvb) |
eaebdedc | 1453 | seq_puts(s, ",rgrplvb"); |
471f3db2 BM |
1454 | if (args->ar_loccookie) |
1455 | seq_puts(s, ",loccookie"); | |
9e6e0a12 SW |
1456 | return 0; |
1457 | } | |
1458 | ||
f42ab085 SW |
1459 | static void gfs2_final_release_pages(struct gfs2_inode *ip) |
1460 | { | |
1461 | struct inode *inode = &ip->i_inode; | |
1462 | struct gfs2_glock *gl = ip->i_gl; | |
1463 | ||
1464 | truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); | |
1465 | truncate_inode_pages(&inode->i_data, 0); | |
1466 | ||
1467 | if (atomic_read(&gl->gl_revokes) == 0) { | |
1468 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
1469 | clear_bit(GLF_DIRTY, &gl->gl_flags); | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | static int gfs2_dinode_dealloc(struct gfs2_inode *ip) | |
1474 | { | |
1475 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
f42ab085 | 1476 | struct gfs2_rgrpd *rgd; |
564e12b1 | 1477 | struct gfs2_holder gh; |
f42ab085 SW |
1478 | int error; |
1479 | ||
1480 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { | |
94fb763b | 1481 | gfs2_consist_inode(ip); |
f42ab085 SW |
1482 | return -EIO; |
1483 | } | |
1484 | ||
8e2e0047 BP |
1485 | error = gfs2_rindex_update(sdp); |
1486 | if (error) | |
1487 | return error; | |
f42ab085 | 1488 | |
f4108a60 | 1489 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
f42ab085 | 1490 | if (error) |
5407e242 | 1491 | return error; |
f42ab085 | 1492 | |
66fc061b | 1493 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
f42ab085 SW |
1494 | if (!rgd) { |
1495 | gfs2_consist_inode(ip); | |
1496 | error = -EIO; | |
8339ee54 | 1497 | goto out_qs; |
f42ab085 SW |
1498 | } |
1499 | ||
564e12b1 | 1500 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
f42ab085 | 1501 | if (error) |
8339ee54 | 1502 | goto out_qs; |
f42ab085 | 1503 | |
4667a0ec SW |
1504 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, |
1505 | sdp->sd_jdesc->jd_blocks); | |
f42ab085 SW |
1506 | if (error) |
1507 | goto out_rg_gunlock; | |
1508 | ||
1509 | gfs2_free_di(rgd, ip); | |
1510 | ||
1511 | gfs2_final_release_pages(ip); | |
1512 | ||
1513 | gfs2_trans_end(sdp); | |
1514 | ||
1515 | out_rg_gunlock: | |
564e12b1 | 1516 | gfs2_glock_dq_uninit(&gh); |
f42ab085 SW |
1517 | out_qs: |
1518 | gfs2_quota_unhold(ip); | |
f42ab085 SW |
1519 | return error; |
1520 | } | |
1521 | ||
71c1b213 AG |
1522 | /** |
1523 | * gfs2_glock_put_eventually | |
1524 | * @gl: The glock to put | |
1525 | * | |
1526 | * When under memory pressure, trigger a deferred glock put to make sure we | |
1527 | * won't call into DLM and deadlock. Otherwise, put the glock directly. | |
1528 | */ | |
1529 | ||
1530 | static void gfs2_glock_put_eventually(struct gfs2_glock *gl) | |
1531 | { | |
1532 | if (current->flags & PF_MEMALLOC) | |
1533 | gfs2_glock_queue_put(gl); | |
1534 | else | |
1535 | gfs2_glock_put(gl); | |
1536 | } | |
1537 | ||
380f7c65 SW |
1538 | /** |
1539 | * gfs2_evict_inode - Remove an inode from cache | |
1540 | * @inode: The inode to evict | |
1541 | * | |
1542 | * There are three cases to consider: | |
1543 | * 1. i_nlink == 0, we are final opener (and must deallocate) | |
1544 | * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) | |
1545 | * 3. i_nlink > 0 | |
1546 | * | |
1547 | * If the fs is read only, then we have to treat all cases as per #3 | |
1548 | * since we are unable to do any deallocation. The inode will be | |
1549 | * deallocated by the next read/write node to attempt an allocation | |
1550 | * in the same resource group | |
1551 | * | |
9e6e0a12 SW |
1552 | * We have to (at the moment) hold the inodes main lock to cover |
1553 | * the gap between unlocking the shared lock on the iopen lock and | |
1554 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
1555 | * conversion on the iopen lock, but we can change that later. This | |
1556 | * is safe, just less efficient. | |
1557 | */ | |
1558 | ||
d5c1515c | 1559 | static void gfs2_evict_inode(struct inode *inode) |
9e6e0a12 | 1560 | { |
001e8e8d SW |
1561 | struct super_block *sb = inode->i_sb; |
1562 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
9e6e0a12 SW |
1563 | struct gfs2_inode *ip = GFS2_I(inode); |
1564 | struct gfs2_holder gh; | |
ee530bea | 1565 | struct address_space *metamapping; |
9e6e0a12 SW |
1566 | int error; |
1567 | ||
05978803 AD |
1568 | if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { |
1569 | clear_inode(inode); | |
1570 | return; | |
1571 | } | |
1572 | ||
bc98a42c | 1573 | if (inode->i_nlink || sb_rdonly(sb)) |
d5c1515c AV |
1574 | goto out; |
1575 | ||
e0b62e21 AG |
1576 | if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { |
1577 | BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl)); | |
1578 | gfs2_holder_mark_uninitialized(&gh); | |
1579 | goto alloc_failed; | |
1580 | } | |
1581 | ||
6a1c8f6d AG |
1582 | /* Deletes should never happen under memory pressure anymore. */ |
1583 | if (WARN_ON_ONCE(current->flags & PF_MEMALLOC)) | |
1584 | goto out; | |
1585 | ||
44ad37d6 BP |
1586 | /* Must not read inode block until block type has been verified */ |
1587 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); | |
9e6e0a12 | 1588 | if (unlikely(error)) { |
240c6235 | 1589 | glock_clear_object(ip->i_iopen_gh.gh_gl, ip); |
a6a4d98b | 1590 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
d4da3198 | 1591 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
9e6e0a12 SW |
1592 | goto out; |
1593 | } | |
1594 | ||
e0b62e21 AG |
1595 | error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); |
1596 | if (error) | |
1597 | goto out_truncate; | |
acf7e244 | 1598 | |
44ad37d6 BP |
1599 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
1600 | error = gfs2_inode_refresh(ip); | |
1601 | if (error) | |
1602 | goto out_truncate; | |
1603 | } | |
1604 | ||
71c1b213 AG |
1605 | /* |
1606 | * The inode may have been recreated in the meantime. | |
1607 | */ | |
1608 | if (inode->i_nlink) | |
1609 | goto out_truncate; | |
1610 | ||
e0b62e21 | 1611 | alloc_failed: |
6df9f9a2 | 1612 | if (gfs2_holder_initialized(&ip->i_iopen_gh) && |
7508abc4 BP |
1613 | test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
1614 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; | |
1615 | gfs2_glock_dq_wait(&ip->i_iopen_gh); | |
1616 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, | |
1617 | &ip->i_iopen_gh); | |
1618 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
1619 | if (error) | |
1620 | goto out_truncate; | |
1621 | } | |
9e6e0a12 | 1622 | |
380f7c65 SW |
1623 | /* Case 1 starts here */ |
1624 | ||
9e6e0a12 SW |
1625 | if (S_ISDIR(inode->i_mode) && |
1626 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | |
1627 | error = gfs2_dir_exhash_dealloc(ip); | |
1628 | if (error) | |
1629 | goto out_unlock; | |
1630 | } | |
1631 | ||
1632 | if (ip->i_eattr) { | |
1633 | error = gfs2_ea_dealloc(ip); | |
1634 | if (error) | |
1635 | goto out_unlock; | |
1636 | } | |
1637 | ||
1638 | if (!gfs2_is_stuffed(ip)) { | |
1639 | error = gfs2_file_dealloc(ip); | |
1640 | if (error) | |
1641 | goto out_unlock; | |
1642 | } | |
1643 | ||
240c6235 BP |
1644 | /* We're about to clear the bitmap for the dinode, but as soon as we |
1645 | do, gfs2_create_inode can create another inode at the same block | |
1646 | location and try to set gl_object again. We clear gl_object here so | |
1647 | that subsequent inode creates don't see an old gl_object. */ | |
1648 | glock_clear_object(ip->i_gl, ip); | |
9e6e0a12 | 1649 | error = gfs2_dinode_dealloc(ip); |
f42ab085 | 1650 | goto out_unlock; |
9e6e0a12 SW |
1651 | |
1652 | out_truncate: | |
24972557 | 1653 | gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH); |
ee530bea | 1654 | metamapping = gfs2_glock2aspace(ip->i_gl); |
2216db70 | 1655 | if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { |
2216db70 BM |
1656 | filemap_fdatawrite(metamapping); |
1657 | filemap_fdatawait(metamapping); | |
1658 | } | |
40ac218f | 1659 | write_inode_now(inode, 1); |
b5b24d7a | 1660 | gfs2_ail_flush(ip->i_gl, 0); |
40ac218f | 1661 | |
380f7c65 | 1662 | /* Case 2 starts here */ |
9e6e0a12 SW |
1663 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
1664 | if (error) | |
1665 | goto out_unlock; | |
380f7c65 SW |
1666 | /* Needs to be done before glock release & also in a transaction */ |
1667 | truncate_inode_pages(&inode->i_data, 0); | |
ee530bea | 1668 | truncate_inode_pages(metamapping, 0); |
9e6e0a12 SW |
1669 | gfs2_trans_end(sdp); |
1670 | ||
1671 | out_unlock: | |
380f7c65 | 1672 | /* Error path for case 1 */ |
a097dc7e BP |
1673 | if (gfs2_rs_active(&ip->i_res)) |
1674 | gfs2_rs_deltree(&ip->i_res); | |
8e2e0047 | 1675 | |
6df9f9a2 | 1676 | if (gfs2_holder_initialized(&ip->i_iopen_gh)) { |
240c6235 | 1677 | glock_clear_object(ip->i_iopen_gh.gh_gl, ip); |
7508abc4 BP |
1678 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
1679 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; | |
d4da3198 | 1680 | gfs2_glock_dq(&ip->i_iopen_gh); |
7508abc4 BP |
1681 | } |
1682 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
a6a4d98b | 1683 | } |
240c6235 BP |
1684 | if (gfs2_holder_initialized(&gh)) { |
1685 | glock_clear_object(ip->i_gl, ip); | |
e0b62e21 | 1686 | gfs2_glock_dq_uninit(&gh); |
240c6235 | 1687 | } |
9e6e0a12 | 1688 | if (error && error != GLR_TRYFAILED && error != -EROFS) |
d5c1515c | 1689 | fs_warn(sdp, "gfs2_evict_inode: %d\n", error); |
9e6e0a12 | 1690 | out: |
380f7c65 | 1691 | /* Case 3 starts here */ |
91b0abe3 | 1692 | truncate_inode_pages_final(&inode->i_data); |
b54e9a0b | 1693 | gfs2_rsqa_delete(ip, NULL); |
45138990 | 1694 | gfs2_ordered_del_inode(ip); |
dbd5768f | 1695 | clear_inode(inode); |
17d539f0 | 1696 | gfs2_dir_hash_inval(ip); |
df3d87bd | 1697 | glock_clear_object(ip->i_gl, ip); |
4fd1a579 | 1698 | wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE); |
29687a2a | 1699 | gfs2_glock_add_to_lru(ip->i_gl); |
71c1b213 | 1700 | gfs2_glock_put_eventually(ip->i_gl); |
d5c1515c | 1701 | ip->i_gl = NULL; |
6df9f9a2 | 1702 | if (gfs2_holder_initialized(&ip->i_iopen_gh)) { |
71c1b213 AG |
1703 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
1704 | ||
1705 | glock_clear_object(gl, ip); | |
a6a4d98b | 1706 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
71c1b213 | 1707 | gfs2_glock_hold(gl); |
d4da3198 | 1708 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
71c1b213 | 1709 | gfs2_glock_put_eventually(gl); |
d5c1515c | 1710 | } |
9e6e0a12 SW |
1711 | } |
1712 | ||
1713 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | |
1714 | { | |
1715 | struct gfs2_inode *ip; | |
1716 | ||
1717 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
1718 | if (ip) { | |
1719 | ip->i_flags = 0; | |
1720 | ip->i_gl = NULL; | |
54335b1f | 1721 | ip->i_rgd = NULL; |
a097dc7e BP |
1722 | memset(&ip->i_res, 0, sizeof(ip->i_res)); |
1723 | RB_CLEAR_NODE(&ip->i_res.rs_node); | |
c8d57703 | 1724 | ip->i_rahead = 0; |
9e6e0a12 SW |
1725 | } |
1726 | return &ip->i_inode; | |
1727 | } | |
1728 | ||
fa0d7e3d | 1729 | static void gfs2_i_callback(struct rcu_head *head) |
9e6e0a12 | 1730 | { |
fa0d7e3d | 1731 | struct inode *inode = container_of(head, struct inode, i_rcu); |
9e6e0a12 SW |
1732 | kmem_cache_free(gfs2_inode_cachep, inode); |
1733 | } | |
1734 | ||
fa0d7e3d NP |
1735 | static void gfs2_destroy_inode(struct inode *inode) |
1736 | { | |
1737 | call_rcu(&inode->i_rcu, gfs2_i_callback); | |
1738 | } | |
1739 | ||
9e6e0a12 SW |
1740 | const struct super_operations gfs2_super_ops = { |
1741 | .alloc_inode = gfs2_alloc_inode, | |
1742 | .destroy_inode = gfs2_destroy_inode, | |
1743 | .write_inode = gfs2_write_inode, | |
ab9bbda0 | 1744 | .dirty_inode = gfs2_dirty_inode, |
d5c1515c | 1745 | .evict_inode = gfs2_evict_inode, |
9e6e0a12 | 1746 | .put_super = gfs2_put_super, |
9e6e0a12 | 1747 | .sync_fs = gfs2_sync_fs, |
2e60d768 BM |
1748 | .freeze_super = gfs2_freeze, |
1749 | .thaw_super = gfs2_unfreeze, | |
9e6e0a12 SW |
1750 | .statfs = gfs2_statfs, |
1751 | .remount_fs = gfs2_remount_fs, | |
9e6e0a12 SW |
1752 | .drop_inode = gfs2_drop_inode, |
1753 | .show_options = gfs2_show_options, | |
1754 | }; | |
1755 |