Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
da6dd40d | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
d77d1b58 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
9e6e0a12 | 12 | #include <linux/bio.h> |
b3b94faa DT |
13 | #include <linux/sched.h> |
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> |
b3b94faa DT |
29 | |
30 | #include "gfs2.h" | |
5c676f6d | 31 | #include "incore.h" |
b3b94faa DT |
32 | #include "bmap.h" |
33 | #include "dir.h" | |
b3b94faa DT |
34 | #include "glock.h" |
35 | #include "glops.h" | |
36 | #include "inode.h" | |
37 | #include "log.h" | |
38 | #include "meta_io.h" | |
39 | #include "quota.h" | |
40 | #include "recovery.h" | |
41 | #include "rgrp.h" | |
42 | #include "super.h" | |
43 | #include "trans.h" | |
5c676f6d | 44 | #include "util.h" |
9e6e0a12 | 45 | #include "sys.h" |
307cf6e6 | 46 | #include "xattr.h" |
9e6e0a12 SW |
47 | |
48 | #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) | |
49 | ||
50 | enum { | |
51 | Opt_lockproto, | |
52 | Opt_locktable, | |
53 | Opt_hostdata, | |
54 | Opt_spectator, | |
55 | Opt_ignore_local_fs, | |
56 | Opt_localflocks, | |
57 | Opt_localcaching, | |
58 | Opt_debug, | |
59 | Opt_nodebug, | |
60 | Opt_upgrade, | |
61 | Opt_acl, | |
62 | Opt_noacl, | |
63 | Opt_quota_off, | |
64 | Opt_quota_account, | |
65 | Opt_quota_on, | |
66 | Opt_quota, | |
67 | Opt_noquota, | |
68 | Opt_suiddir, | |
69 | Opt_nosuiddir, | |
70 | Opt_data_writeback, | |
71 | Opt_data_ordered, | |
72 | Opt_meta, | |
73 | Opt_discard, | |
74 | Opt_nodiscard, | |
75 | Opt_commit, | |
d34843d0 BP |
76 | Opt_err_withdraw, |
77 | Opt_err_panic, | |
3d3c10f2 BM |
78 | Opt_statfs_quantum, |
79 | Opt_statfs_percent, | |
80 | Opt_quota_quantum, | |
f25934c5 CH |
81 | Opt_barrier, |
82 | Opt_nobarrier, | |
90306c41 BM |
83 | Opt_rgrplvb, |
84 | Opt_norgrplvb, | |
9e6e0a12 SW |
85 | Opt_error, |
86 | }; | |
87 | ||
88 | static const match_table_t tokens = { | |
89 | {Opt_lockproto, "lockproto=%s"}, | |
90 | {Opt_locktable, "locktable=%s"}, | |
91 | {Opt_hostdata, "hostdata=%s"}, | |
92 | {Opt_spectator, "spectator"}, | |
43f74c19 | 93 | {Opt_spectator, "norecovery"}, |
9e6e0a12 SW |
94 | {Opt_ignore_local_fs, "ignore_local_fs"}, |
95 | {Opt_localflocks, "localflocks"}, | |
96 | {Opt_localcaching, "localcaching"}, | |
97 | {Opt_debug, "debug"}, | |
98 | {Opt_nodebug, "nodebug"}, | |
99 | {Opt_upgrade, "upgrade"}, | |
100 | {Opt_acl, "acl"}, | |
101 | {Opt_noacl, "noacl"}, | |
102 | {Opt_quota_off, "quota=off"}, | |
103 | {Opt_quota_account, "quota=account"}, | |
104 | {Opt_quota_on, "quota=on"}, | |
105 | {Opt_quota, "quota"}, | |
106 | {Opt_noquota, "noquota"}, | |
107 | {Opt_suiddir, "suiddir"}, | |
108 | {Opt_nosuiddir, "nosuiddir"}, | |
109 | {Opt_data_writeback, "data=writeback"}, | |
110 | {Opt_data_ordered, "data=ordered"}, | |
111 | {Opt_meta, "meta"}, | |
112 | {Opt_discard, "discard"}, | |
113 | {Opt_nodiscard, "nodiscard"}, | |
114 | {Opt_commit, "commit=%d"}, | |
d34843d0 BP |
115 | {Opt_err_withdraw, "errors=withdraw"}, |
116 | {Opt_err_panic, "errors=panic"}, | |
3d3c10f2 BM |
117 | {Opt_statfs_quantum, "statfs_quantum=%d"}, |
118 | {Opt_statfs_percent, "statfs_percent=%d"}, | |
119 | {Opt_quota_quantum, "quota_quantum=%d"}, | |
f25934c5 CH |
120 | {Opt_barrier, "barrier"}, |
121 | {Opt_nobarrier, "nobarrier"}, | |
90306c41 BM |
122 | {Opt_rgrplvb, "rgrplvb"}, |
123 | {Opt_norgrplvb, "norgrplvb"}, | |
9e6e0a12 SW |
124 | {Opt_error, NULL} |
125 | }; | |
126 | ||
127 | /** | |
128 | * gfs2_mount_args - Parse mount options | |
f55073ff SW |
129 | * @args: The structure into which the parsed options will be written |
130 | * @options: The options to parse | |
9e6e0a12 SW |
131 | * |
132 | * Return: errno | |
133 | */ | |
134 | ||
f55073ff | 135 | int gfs2_mount_args(struct gfs2_args *args, char *options) |
9e6e0a12 SW |
136 | { |
137 | char *o; | |
138 | int token; | |
139 | substring_t tmp[MAX_OPT_ARGS]; | |
140 | int rv; | |
141 | ||
142 | /* Split the options into tokens with the "," character and | |
143 | process them */ | |
144 | ||
145 | while (1) { | |
146 | o = strsep(&options, ","); | |
147 | if (o == NULL) | |
148 | break; | |
149 | if (*o == '\0') | |
150 | continue; | |
151 | ||
152 | token = match_token(o, tokens, tmp); | |
153 | switch (token) { | |
154 | case Opt_lockproto: | |
155 | match_strlcpy(args->ar_lockproto, &tmp[0], | |
156 | GFS2_LOCKNAME_LEN); | |
157 | break; | |
158 | case Opt_locktable: | |
159 | match_strlcpy(args->ar_locktable, &tmp[0], | |
160 | GFS2_LOCKNAME_LEN); | |
161 | break; | |
162 | case Opt_hostdata: | |
163 | match_strlcpy(args->ar_hostdata, &tmp[0], | |
164 | GFS2_LOCKNAME_LEN); | |
165 | break; | |
166 | case Opt_spectator: | |
167 | args->ar_spectator = 1; | |
168 | break; | |
169 | case Opt_ignore_local_fs: | |
f57a024e | 170 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
171 | break; |
172 | case Opt_localflocks: | |
173 | args->ar_localflocks = 1; | |
174 | break; | |
175 | case Opt_localcaching: | |
c2048b00 | 176 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
177 | break; |
178 | case Opt_debug: | |
d34843d0 | 179 | if (args->ar_errors == GFS2_ERRORS_PANIC) { |
d77d1b58 | 180 | pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
d34843d0 BP |
181 | return -EINVAL; |
182 | } | |
9e6e0a12 SW |
183 | args->ar_debug = 1; |
184 | break; | |
185 | case Opt_nodebug: | |
186 | args->ar_debug = 0; | |
187 | break; | |
188 | case Opt_upgrade: | |
c80dbb58 | 189 | /* Retained for backwards compat only */ |
9e6e0a12 SW |
190 | break; |
191 | case Opt_acl: | |
192 | args->ar_posix_acl = 1; | |
193 | break; | |
194 | case Opt_noacl: | |
195 | args->ar_posix_acl = 0; | |
196 | break; | |
197 | case Opt_quota_off: | |
198 | case Opt_noquota: | |
199 | args->ar_quota = GFS2_QUOTA_OFF; | |
200 | break; | |
201 | case Opt_quota_account: | |
202 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
203 | break; | |
204 | case Opt_quota_on: | |
205 | case Opt_quota: | |
206 | args->ar_quota = GFS2_QUOTA_ON; | |
207 | break; | |
208 | case Opt_suiddir: | |
209 | args->ar_suiddir = 1; | |
210 | break; | |
211 | case Opt_nosuiddir: | |
212 | args->ar_suiddir = 0; | |
213 | break; | |
214 | case Opt_data_writeback: | |
215 | args->ar_data = GFS2_DATA_WRITEBACK; | |
216 | break; | |
217 | case Opt_data_ordered: | |
218 | args->ar_data = GFS2_DATA_ORDERED; | |
219 | break; | |
220 | case Opt_meta: | |
221 | args->ar_meta = 1; | |
222 | break; | |
223 | case Opt_discard: | |
224 | args->ar_discard = 1; | |
225 | break; | |
226 | case Opt_nodiscard: | |
227 | args->ar_discard = 0; | |
228 | break; | |
229 | case Opt_commit: | |
230 | rv = match_int(&tmp[0], &args->ar_commit); | |
231 | if (rv || args->ar_commit <= 0) { | |
d77d1b58 | 232 | pr_warn("commit mount option requires a positive numeric argument\n"); |
9e6e0a12 SW |
233 | return rv ? rv : -EINVAL; |
234 | } | |
235 | break; | |
3d3c10f2 BM |
236 | case Opt_statfs_quantum: |
237 | rv = match_int(&tmp[0], &args->ar_statfs_quantum); | |
238 | if (rv || args->ar_statfs_quantum < 0) { | |
d77d1b58 | 239 | pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n"); |
3d3c10f2 BM |
240 | return rv ? rv : -EINVAL; |
241 | } | |
242 | break; | |
243 | case Opt_quota_quantum: | |
244 | rv = match_int(&tmp[0], &args->ar_quota_quantum); | |
245 | if (rv || args->ar_quota_quantum <= 0) { | |
d77d1b58 | 246 | pr_warn("quota_quantum mount option requires a positive numeric argument\n"); |
3d3c10f2 BM |
247 | return rv ? rv : -EINVAL; |
248 | } | |
249 | break; | |
250 | case Opt_statfs_percent: | |
251 | rv = match_int(&tmp[0], &args->ar_statfs_percent); | |
252 | if (rv || args->ar_statfs_percent < 0 || | |
253 | args->ar_statfs_percent > 100) { | |
fc554ed3 | 254 | pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n"); |
3d3c10f2 BM |
255 | return rv ? rv : -EINVAL; |
256 | } | |
257 | break; | |
d34843d0 BP |
258 | case Opt_err_withdraw: |
259 | args->ar_errors = GFS2_ERRORS_WITHDRAW; | |
260 | break; | |
261 | case Opt_err_panic: | |
262 | if (args->ar_debug) { | |
d77d1b58 | 263 | pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
d34843d0 BP |
264 | return -EINVAL; |
265 | } | |
266 | args->ar_errors = GFS2_ERRORS_PANIC; | |
267 | break; | |
f25934c5 CH |
268 | case Opt_barrier: |
269 | args->ar_nobarrier = 0; | |
270 | break; | |
271 | case Opt_nobarrier: | |
272 | args->ar_nobarrier = 1; | |
273 | break; | |
90306c41 BM |
274 | case Opt_rgrplvb: |
275 | args->ar_rgrplvb = 1; | |
276 | break; | |
277 | case Opt_norgrplvb: | |
278 | args->ar_rgrplvb = 0; | |
279 | break; | |
9e6e0a12 SW |
280 | case Opt_error: |
281 | default: | |
d77d1b58 | 282 | pr_warn("invalid mount option: %s\n", o); |
9e6e0a12 SW |
283 | return -EINVAL; |
284 | } | |
285 | } | |
286 | ||
287 | return 0; | |
288 | } | |
b3b94faa | 289 | |
fefc03bf SW |
290 | /** |
291 | * gfs2_jindex_free - Clear all the journal index information | |
292 | * @sdp: The GFS2 superblock | |
293 | * | |
294 | */ | |
295 | ||
296 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
297 | { | |
b50f227b | 298 | struct list_head list; |
fefc03bf | 299 | struct gfs2_jdesc *jd; |
fefc03bf SW |
300 | |
301 | spin_lock(&sdp->sd_jindex_spin); | |
302 | list_add(&list, &sdp->sd_jindex_list); | |
303 | list_del_init(&sdp->sd_jindex_list); | |
304 | sdp->sd_journals = 0; | |
305 | spin_unlock(&sdp->sd_jindex_spin); | |
306 | ||
307 | while (!list_empty(&list)) { | |
308 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
b50f227b | 309 | gfs2_free_journal_extents(jd); |
fefc03bf SW |
310 | list_del(&jd->jd_list); |
311 | iput(jd->jd_inode); | |
312 | kfree(jd); | |
313 | } | |
314 | } | |
315 | ||
b3b94faa DT |
316 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) |
317 | { | |
318 | struct gfs2_jdesc *jd; | |
319 | int found = 0; | |
320 | ||
321 | list_for_each_entry(jd, head, jd_list) { | |
322 | if (jd->jd_jid == jid) { | |
323 | found = 1; | |
324 | break; | |
325 | } | |
326 | } | |
327 | ||
328 | if (!found) | |
329 | jd = NULL; | |
330 | ||
331 | return jd; | |
332 | } | |
333 | ||
334 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
335 | { | |
336 | struct gfs2_jdesc *jd; | |
337 | ||
338 | spin_lock(&sdp->sd_jindex_spin); | |
339 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
340 | spin_unlock(&sdp->sd_jindex_spin); | |
341 | ||
342 | return jd; | |
343 | } | |
344 | ||
b3b94faa DT |
345 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) |
346 | { | |
feaa7bba SW |
347 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
348 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
a2e0f799 | 349 | u64 size = i_size_read(jd->jd_inode); |
b3b94faa | 350 | |
a2e0f799 | 351 | if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, 1 << 30)) |
b3b94faa | 352 | return -EIO; |
b3b94faa | 353 | |
a2e0f799 SW |
354 | jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; |
355 | ||
356 | if (gfs2_write_alloc_required(ip, 0, size)) { | |
b3b94faa | 357 | gfs2_consist_inode(ip); |
461cb419 | 358 | return -EIO; |
b3b94faa DT |
359 | } |
360 | ||
461cb419 | 361 | return 0; |
b3b94faa DT |
362 | } |
363 | ||
8ad151c2 SW |
364 | static int init_threads(struct gfs2_sbd *sdp) |
365 | { | |
366 | struct task_struct *p; | |
367 | int error = 0; | |
368 | ||
369 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); | |
370 | if (IS_ERR(p)) { | |
371 | error = PTR_ERR(p); | |
372 | fs_err(sdp, "can't start logd thread: %d\n", error); | |
373 | return error; | |
374 | } | |
375 | sdp->sd_logd_process = p; | |
376 | ||
377 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); | |
378 | if (IS_ERR(p)) { | |
379 | error = PTR_ERR(p); | |
380 | fs_err(sdp, "can't start quotad thread: %d\n", error); | |
381 | goto fail; | |
382 | } | |
383 | sdp->sd_quotad_process = p; | |
384 | return 0; | |
385 | ||
386 | fail: | |
387 | kthread_stop(sdp->sd_logd_process); | |
388 | return error; | |
389 | } | |
390 | ||
b3b94faa DT |
391 | /** |
392 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
393 | * @sdp: the filesystem | |
394 | * | |
395 | * Returns: errno | |
396 | */ | |
397 | ||
398 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
399 | { | |
feaa7bba | 400 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 401 | struct gfs2_glock *j_gl = ip->i_gl; |
24972557 | 402 | struct gfs2_holder thaw_gh; |
55167622 | 403 | struct gfs2_log_header_host head; |
b3b94faa DT |
404 | int error; |
405 | ||
8ad151c2 | 406 | error = init_threads(sdp); |
b3b94faa DT |
407 | if (error) |
408 | return error; | |
409 | ||
24972557 BM |
410 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, |
411 | &thaw_gh); | |
8ad151c2 SW |
412 | if (error) |
413 | goto fail_threads; | |
414 | ||
1a14d3a6 | 415 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
416 | |
417 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
418 | if (error) | |
419 | goto fail; | |
420 | ||
421 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
422 | gfs2_consist(sdp); | |
423 | error = -EIO; | |
424 | goto fail; | |
425 | } | |
426 | ||
427 | /* Initialize some head of the log stuff */ | |
428 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
429 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
430 | ||
b3b94faa DT |
431 | error = gfs2_quota_init(sdp); |
432 | if (error) | |
a91ea69f | 433 | goto fail; |
b3b94faa DT |
434 | |
435 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
436 | ||
24972557 | 437 | gfs2_glock_dq_uninit(&thaw_gh); |
b3b94faa DT |
438 | |
439 | return 0; | |
440 | ||
a91ea69f | 441 | fail: |
24972557 BM |
442 | thaw_gh.gh_flags |= GL_NOCACHE; |
443 | gfs2_glock_dq_uninit(&thaw_gh); | |
8ad151c2 SW |
444 | fail_threads: |
445 | kthread_stop(sdp->sd_quotad_process); | |
446 | kthread_stop(sdp->sd_logd_process); | |
b3b94faa DT |
447 | return error; |
448 | } | |
449 | ||
1946f70a | 450 | void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
bb8d8a6f SW |
451 | { |
452 | const struct gfs2_statfs_change *str = buf; | |
453 | ||
454 | sc->sc_total = be64_to_cpu(str->sc_total); | |
455 | sc->sc_free = be64_to_cpu(str->sc_free); | |
456 | sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); | |
457 | } | |
458 | ||
459 | static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) | |
460 | { | |
461 | struct gfs2_statfs_change *str = buf; | |
462 | ||
463 | str->sc_total = cpu_to_be64(sc->sc_total); | |
464 | str->sc_free = cpu_to_be64(sc->sc_free); | |
465 | str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); | |
466 | } | |
467 | ||
b3b94faa DT |
468 | int gfs2_statfs_init(struct gfs2_sbd *sdp) |
469 | { | |
feaa7bba | 470 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 471 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 472 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 473 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
474 | struct buffer_head *m_bh, *l_bh; |
475 | struct gfs2_holder gh; | |
476 | int error; | |
477 | ||
478 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
479 | &gh); | |
480 | if (error) | |
481 | return error; | |
482 | ||
483 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
484 | if (error) | |
485 | goto out; | |
486 | ||
487 | if (sdp->sd_args.ar_spectator) { | |
488 | spin_lock(&sdp->sd_statfs_spin); | |
489 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
490 | sizeof(struct gfs2_dinode)); | |
491 | spin_unlock(&sdp->sd_statfs_spin); | |
492 | } else { | |
493 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
494 | if (error) | |
495 | goto out_m_bh; | |
496 | ||
497 | spin_lock(&sdp->sd_statfs_spin); | |
498 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
499 | sizeof(struct gfs2_dinode)); | |
500 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
501 | sizeof(struct gfs2_dinode)); | |
502 | spin_unlock(&sdp->sd_statfs_spin); | |
503 | ||
504 | brelse(l_bh); | |
505 | } | |
506 | ||
a91ea69f | 507 | out_m_bh: |
b3b94faa | 508 | brelse(m_bh); |
a91ea69f | 509 | out: |
b3b94faa | 510 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
511 | return 0; |
512 | } | |
513 | ||
cd915493 SW |
514 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
515 | s64 dinodes) | |
b3b94faa | 516 | { |
feaa7bba | 517 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 518 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
3d3c10f2 | 519 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
b3b94faa | 520 | struct buffer_head *l_bh; |
c14f5735 BM |
521 | s64 x, y; |
522 | int need_sync = 0; | |
b3b94faa DT |
523 | int error; |
524 | ||
525 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
526 | if (error) | |
527 | return; | |
528 | ||
350a9b0a | 529 | gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
b3b94faa DT |
530 | |
531 | spin_lock(&sdp->sd_statfs_spin); | |
532 | l_sc->sc_total += total; | |
533 | l_sc->sc_free += free; | |
534 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 535 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
c14f5735 BM |
536 | if (sdp->sd_args.ar_statfs_percent) { |
537 | x = 100 * l_sc->sc_free; | |
538 | y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; | |
539 | if (x >= y || x <= -y) | |
540 | need_sync = 1; | |
541 | } | |
b3b94faa DT |
542 | spin_unlock(&sdp->sd_statfs_spin); |
543 | ||
544 | brelse(l_bh); | |
c14f5735 | 545 | if (need_sync) |
3d3c10f2 | 546 | gfs2_wake_up_statfs(sdp); |
b3b94faa DT |
547 | } |
548 | ||
1946f70a BM |
549 | void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, |
550 | struct buffer_head *l_bh) | |
551 | { | |
552 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); | |
553 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
554 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
555 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
556 | ||
350a9b0a | 557 | gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
1946f70a BM |
558 | |
559 | spin_lock(&sdp->sd_statfs_spin); | |
560 | m_sc->sc_total += l_sc->sc_total; | |
561 | m_sc->sc_free += l_sc->sc_free; | |
562 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
563 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
564 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
565 | 0, sizeof(struct gfs2_statfs_change)); | |
566 | spin_unlock(&sdp->sd_statfs_spin); | |
567 | ||
350a9b0a | 568 | gfs2_trans_add_meta(m_ip->i_gl, m_bh); |
1946f70a BM |
569 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
570 | } | |
571 | ||
8c42d637 | 572 | int gfs2_statfs_sync(struct super_block *sb, int type) |
b3b94faa | 573 | { |
8c42d637 | 574 | struct gfs2_sbd *sdp = sb->s_fs_info; |
feaa7bba SW |
575 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
576 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
577 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
578 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
579 | struct gfs2_holder gh; |
580 | struct buffer_head *m_bh, *l_bh; | |
581 | int error; | |
582 | ||
583 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
584 | &gh); | |
585 | if (error) | |
586 | return error; | |
587 | ||
588 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
589 | if (error) | |
590 | goto out; | |
591 | ||
592 | spin_lock(&sdp->sd_statfs_spin); | |
593 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 594 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
595 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
596 | spin_unlock(&sdp->sd_statfs_spin); | |
597 | goto out_bh; | |
598 | } | |
599 | spin_unlock(&sdp->sd_statfs_spin); | |
600 | ||
601 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
602 | if (error) | |
603 | goto out_bh; | |
604 | ||
605 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
606 | if (error) | |
607 | goto out_bh2; | |
608 | ||
1946f70a | 609 | update_statfs(sdp, m_bh, l_bh); |
3d3c10f2 | 610 | sdp->sd_statfs_force_sync = 0; |
b3b94faa DT |
611 | |
612 | gfs2_trans_end(sdp); | |
613 | ||
a91ea69f | 614 | out_bh2: |
b3b94faa | 615 | brelse(l_bh); |
a91ea69f | 616 | out_bh: |
b3b94faa | 617 | brelse(m_bh); |
a91ea69f | 618 | out: |
b3b94faa | 619 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
620 | return error; |
621 | } | |
622 | ||
b3b94faa DT |
623 | struct lfcc { |
624 | struct list_head list; | |
625 | struct gfs2_holder gh; | |
626 | }; | |
627 | ||
628 | /** | |
629 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
630 | * journals are clean | |
631 | * @sdp: the file system | |
632 | * @state: the state to put the transaction lock into | |
633 | * @t_gh: the hold on the transaction lock | |
634 | * | |
635 | * Returns: errno | |
636 | */ | |
637 | ||
08bc2dbc | 638 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
24972557 | 639 | struct gfs2_holder *freeze_gh) |
b3b94faa | 640 | { |
5c676f6d | 641 | struct gfs2_inode *ip; |
b3b94faa DT |
642 | struct gfs2_jdesc *jd; |
643 | struct lfcc *lfcc; | |
644 | LIST_HEAD(list); | |
55167622 | 645 | struct gfs2_log_header_host lh; |
24972557 | 646 | struct gfs2_inode *dip = GFS2_I(sdp->sd_root_dir->d_inode); |
b3b94faa DT |
647 | int error; |
648 | ||
24972557 BM |
649 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, |
650 | &sdp->sd_freeze_root_gh); | |
651 | if (error) | |
652 | return error; | |
653 | atomic_set(&sdp->sd_frozen_root, 1); | |
b3b94faa DT |
654 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
655 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
656 | if (!lfcc) { | |
657 | error = -ENOMEM; | |
658 | goto out; | |
659 | } | |
feaa7bba SW |
660 | ip = GFS2_I(jd->jd_inode); |
661 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
662 | if (error) { |
663 | kfree(lfcc); | |
664 | goto out; | |
665 | } | |
666 | list_add(&lfcc->list, &list); | |
667 | } | |
668 | ||
24972557 BM |
669 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, |
670 | GL_NOCACHE, freeze_gh); | |
b3b94faa DT |
671 | |
672 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
673 | error = gfs2_jdesc_check(jd); | |
674 | if (error) | |
675 | break; | |
676 | error = gfs2_find_jhead(jd, &lh); | |
677 | if (error) | |
678 | break; | |
679 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
680 | error = -EBUSY; | |
681 | break; | |
682 | } | |
683 | } | |
684 | ||
685 | if (error) | |
24972557 | 686 | gfs2_glock_dq_uninit(freeze_gh); |
b3b94faa | 687 | |
a91ea69f | 688 | out: |
b3b94faa DT |
689 | while (!list_empty(&list)) { |
690 | lfcc = list_entry(list.next, struct lfcc, list); | |
691 | list_del(&lfcc->list); | |
692 | gfs2_glock_dq_uninit(&lfcc->gh); | |
693 | kfree(lfcc); | |
694 | } | |
24972557 BM |
695 | if (error) { |
696 | atomic_dec(&sdp->sd_frozen_root); | |
697 | wait_event(sdp->sd_frozen_root_wait, atomic_read(&sdp->sd_frozen_root) == 0); | |
698 | gfs2_glock_dq_uninit(&sdp->sd_freeze_root_gh); | |
699 | } | |
b3b94faa DT |
700 | return error; |
701 | } | |
702 | ||
9eed04cd SW |
703 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
704 | { | |
705 | struct gfs2_dinode *str = buf; | |
706 | ||
707 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
708 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
709 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
710 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
711 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
712 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
d0546426 EB |
713 | str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); |
714 | str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); | |
9eed04cd SW |
715 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); |
716 | str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); | |
717 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); | |
718 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); | |
719 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
720 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
721 | ||
722 | str->di_goal_meta = cpu_to_be64(ip->i_goal); | |
723 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
724 | str->di_generation = cpu_to_be64(ip->i_generation); | |
725 | ||
726 | str->di_flags = cpu_to_be32(ip->i_diskflags); | |
727 | str->di_height = cpu_to_be16(ip->i_height); | |
728 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && | |
729 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? | |
730 | GFS2_FORMAT_DE : 0); | |
731 | str->di_depth = cpu_to_be16(ip->i_depth); | |
732 | str->di_entries = cpu_to_be32(ip->i_entries); | |
733 | ||
734 | str->di_eattr = cpu_to_be64(ip->i_eattr); | |
735 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); | |
736 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
737 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
738 | } | |
9e6e0a12 SW |
739 | |
740 | /** | |
741 | * gfs2_write_inode - Make sure the inode is stable on the disk | |
742 | * @inode: The inode | |
1027efaa | 743 | * @wbc: The writeback control structure |
9e6e0a12 SW |
744 | * |
745 | * Returns: errno | |
746 | */ | |
747 | ||
a9185b41 | 748 | static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) |
9e6e0a12 SW |
749 | { |
750 | struct gfs2_inode *ip = GFS2_I(inode); | |
751 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1027efaa | 752 | struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); |
4667a0ec | 753 | struct backing_dev_info *bdi = metamapping->backing_dev_info; |
ab9bbda0 SW |
754 | int ret = 0; |
755 | ||
a9185b41 | 756 | if (wbc->sync_mode == WB_SYNC_ALL) |
24972557 | 757 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH); |
4667a0ec SW |
758 | if (bdi->dirty_exceeded) |
759 | gfs2_ail1_flush(sdp, wbc); | |
1d4ec642 SW |
760 | else |
761 | filemap_fdatawrite(metamapping); | |
ab9bbda0 | 762 | if (wbc->sync_mode == WB_SYNC_ALL) |
1027efaa SW |
763 | ret = filemap_fdatawait(metamapping); |
764 | if (ret) | |
765 | mark_inode_dirty_sync(inode); | |
9e6e0a12 SW |
766 | return ret; |
767 | } | |
768 | ||
ab9bbda0 SW |
769 | /** |
770 | * gfs2_dirty_inode - check for atime updates | |
771 | * @inode: The inode in question | |
772 | * @flags: The type of dirty | |
773 | * | |
774 | * Unfortunately it can be called under any combination of inode | |
775 | * glock and transaction lock, so we have to check carefully. | |
776 | * | |
777 | * At the moment this deals only with atime - it should be possible | |
778 | * to expand that role in future, once a review of the locking has | |
779 | * been carried out. | |
780 | */ | |
781 | ||
782 | static void gfs2_dirty_inode(struct inode *inode, int flags) | |
783 | { | |
784 | struct gfs2_inode *ip = GFS2_I(inode); | |
785 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
786 | struct buffer_head *bh; | |
787 | struct gfs2_holder gh; | |
788 | int need_unlock = 0; | |
789 | int need_endtrans = 0; | |
790 | int ret; | |
791 | ||
792 | if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC))) | |
793 | return; | |
794 | ||
795 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { | |
796 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
797 | if (ret) { | |
798 | fs_err(sdp, "dirty_inode: glock %d\n", ret); | |
799 | return; | |
800 | } | |
801 | need_unlock = 1; | |
3d162688 BM |
802 | } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) |
803 | return; | |
ab9bbda0 SW |
804 | |
805 | if (current->journal_info == NULL) { | |
806 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
807 | if (ret) { | |
808 | fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); | |
809 | goto out; | |
810 | } | |
811 | need_endtrans = 1; | |
812 | } | |
813 | ||
814 | ret = gfs2_meta_inode_buffer(ip, &bh); | |
815 | if (ret == 0) { | |
350a9b0a | 816 | gfs2_trans_add_meta(ip->i_gl, bh); |
ab9bbda0 SW |
817 | gfs2_dinode_out(ip, bh->b_data); |
818 | brelse(bh); | |
819 | } | |
820 | ||
821 | if (need_endtrans) | |
822 | gfs2_trans_end(sdp); | |
823 | out: | |
824 | if (need_unlock) | |
825 | gfs2_glock_dq_uninit(&gh); | |
826 | } | |
827 | ||
9e6e0a12 SW |
828 | /** |
829 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
830 | * @sdp: the filesystem | |
831 | * | |
832 | * Returns: errno | |
833 | */ | |
834 | ||
835 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
836 | { | |
24972557 | 837 | struct gfs2_holder thaw_gh; |
9e6e0a12 SW |
838 | int error; |
839 | ||
24972557 BM |
840 | error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, |
841 | &thaw_gh); | |
842 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
843 | return error; | |
844 | ||
845 | down_write(&sdp->sd_log_flush_lock); | |
846 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
847 | up_write(&sdp->sd_log_flush_lock); | |
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 BM |
856 | gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH); |
857 | gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); | |
9e6e0a12 | 858 | |
24972557 BM |
859 | if (thaw_gh.gh_gl) |
860 | gfs2_glock_dq_uninit(&thaw_gh); | |
9e6e0a12 SW |
861 | |
862 | gfs2_quota_cleanup(sdp); | |
863 | ||
864 | return error; | |
865 | } | |
866 | ||
867 | static int gfs2_umount_recovery_wait(void *word) | |
868 | { | |
869 | schedule(); | |
870 | return 0; | |
871 | } | |
872 | ||
873 | /** | |
874 | * gfs2_put_super - Unmount the filesystem | |
875 | * @sb: The VFS superblock | |
876 | * | |
877 | */ | |
878 | ||
879 | static void gfs2_put_super(struct super_block *sb) | |
880 | { | |
881 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
882 | int error; | |
883 | struct gfs2_jdesc *jd; | |
884 | ||
9e6e0a12 SW |
885 | /* No more recovery requests */ |
886 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); | |
887 | smp_mb(); | |
888 | ||
889 | /* Wait on outstanding recovery */ | |
890 | restart: | |
891 | spin_lock(&sdp->sd_jindex_spin); | |
892 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
893 | if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) | |
894 | continue; | |
895 | spin_unlock(&sdp->sd_jindex_spin); | |
896 | wait_on_bit(&jd->jd_flags, JDF_RECOVERY, | |
897 | gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); | |
898 | goto restart; | |
899 | } | |
900 | spin_unlock(&sdp->sd_jindex_spin); | |
901 | ||
9e6e0a12 SW |
902 | if (!(sb->s_flags & MS_RDONLY)) { |
903 | error = gfs2_make_fs_ro(sdp); | |
904 | if (error) | |
905 | gfs2_io_error(sdp); | |
906 | } | |
907 | /* At this point, we're through modifying the disk */ | |
908 | ||
909 | /* Release stuff */ | |
910 | ||
911 | iput(sdp->sd_jindex); | |
9e6e0a12 SW |
912 | iput(sdp->sd_statfs_inode); |
913 | iput(sdp->sd_rindex); | |
914 | iput(sdp->sd_quota_inode); | |
915 | ||
916 | gfs2_glock_put(sdp->sd_rename_gl); | |
24972557 | 917 | gfs2_glock_put(sdp->sd_freeze_gl); |
9e6e0a12 SW |
918 | |
919 | if (!sdp->sd_args.ar_spectator) { | |
920 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
921 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
9e6e0a12 SW |
922 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
923 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | |
9e6e0a12 SW |
924 | iput(sdp->sd_sc_inode); |
925 | iput(sdp->sd_qc_inode); | |
926 | } | |
927 | ||
928 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | |
929 | gfs2_clear_rgrpd(sdp); | |
930 | gfs2_jindex_free(sdp); | |
931 | /* Take apart glock structures and buffer lists */ | |
932 | gfs2_gl_hash_clear(sdp); | |
933 | /* Unmount the locking protocol */ | |
934 | gfs2_lm_unmount(sdp); | |
935 | ||
936 | /* At this point, we're through participating in the lockspace */ | |
937 | gfs2_sys_fs_del(sdp); | |
938 | } | |
939 | ||
9e6e0a12 SW |
940 | /** |
941 | * gfs2_sync_fs - sync the filesystem | |
942 | * @sb: the superblock | |
943 | * | |
944 | * Flushes the log to disk. | |
945 | */ | |
946 | ||
947 | static int gfs2_sync_fs(struct super_block *sb, int wait) | |
948 | { | |
1027efaa | 949 | struct gfs2_sbd *sdp = sb->s_fs_info; |
a1177825 JK |
950 | |
951 | gfs2_quota_sync(sb, -1); | |
24972557 BM |
952 | if (wait && sdp && !atomic_read(&sdp->sd_log_freeze)) |
953 | gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); | |
9e6e0a12 SW |
954 | return 0; |
955 | } | |
956 | ||
957 | /** | |
958 | * gfs2_freeze - prevent further writes to the filesystem | |
959 | * @sb: the VFS structure for the filesystem | |
960 | * | |
961 | */ | |
962 | ||
963 | static int gfs2_freeze(struct super_block *sb) | |
964 | { | |
965 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
966 | int error; | |
967 | ||
968 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
969 | return -EINVAL; | |
970 | ||
971 | for (;;) { | |
d564053f | 972 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); |
9e6e0a12 SW |
973 | if (!error) |
974 | break; | |
975 | ||
976 | switch (error) { | |
977 | case -EBUSY: | |
978 | fs_err(sdp, "waiting for recovery before freeze\n"); | |
979 | break; | |
980 | ||
981 | default: | |
982 | fs_err(sdp, "error freezing FS: %d\n", error); | |
983 | break; | |
984 | } | |
985 | ||
986 | fs_err(sdp, "retrying...\n"); | |
987 | msleep(1000); | |
988 | } | |
989 | return 0; | |
990 | } | |
991 | ||
992 | /** | |
993 | * gfs2_unfreeze - reallow writes to the filesystem | |
994 | * @sb: the VFS structure for the filesystem | |
995 | * | |
996 | */ | |
997 | ||
998 | static int gfs2_unfreeze(struct super_block *sb) | |
999 | { | |
d564053f SW |
1000 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1001 | ||
1002 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
24972557 BM |
1003 | atomic_dec(&sdp->sd_frozen_root); |
1004 | wait_event(sdp->sd_frozen_root_wait, atomic_read(&sdp->sd_frozen_root) == 0); | |
1005 | gfs2_glock_dq_uninit(&sdp->sd_freeze_root_gh); | |
9e6e0a12 SW |
1006 | return 0; |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * statfs_fill - fill in the sg for a given RG | |
1011 | * @rgd: the RG | |
1012 | * @sc: the sc structure | |
1013 | * | |
1014 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
1015 | */ | |
1016 | ||
1017 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
1018 | struct gfs2_statfs_change_host *sc) | |
1019 | { | |
1020 | gfs2_rgrp_verify(rgd); | |
1021 | sc->sc_total += rgd->rd_data; | |
1022 | sc->sc_free += rgd->rd_free; | |
1023 | sc->sc_dinodes += rgd->rd_dinodes; | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
1029 | * @sdp: the filesystem | |
1030 | * @sc: the sc info that will be returned | |
1031 | * | |
1032 | * Any error (other than a signal) will cause this routine to fall back | |
1033 | * to the synchronous version. | |
1034 | * | |
1035 | * FIXME: This really shouldn't busy wait like this. | |
1036 | * | |
1037 | * Returns: errno | |
1038 | */ | |
1039 | ||
1040 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1041 | { | |
9e6e0a12 SW |
1042 | struct gfs2_rgrpd *rgd_next; |
1043 | struct gfs2_holder *gha, *gh; | |
1044 | unsigned int slots = 64; | |
1045 | unsigned int x; | |
1046 | int done; | |
1047 | int error = 0, err; | |
1048 | ||
1049 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
1050 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
1051 | if (!gha) | |
1052 | return -ENOMEM; | |
1053 | ||
9e6e0a12 SW |
1054 | rgd_next = gfs2_rgrpd_get_first(sdp); |
1055 | ||
1056 | for (;;) { | |
1057 | done = 1; | |
1058 | ||
1059 | for (x = 0; x < slots; x++) { | |
1060 | gh = gha + x; | |
1061 | ||
1062 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
1063 | err = gfs2_glock_wait(gh); | |
1064 | if (err) { | |
1065 | gfs2_holder_uninit(gh); | |
1066 | error = err; | |
1067 | } else { | |
1068 | if (!error) | |
1069 | error = statfs_slow_fill( | |
1070 | gh->gh_gl->gl_object, sc); | |
1071 | gfs2_glock_dq_uninit(gh); | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (gh->gh_gl) | |
1076 | done = 0; | |
1077 | else if (rgd_next && !error) { | |
1078 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
1079 | LM_ST_SHARED, | |
1080 | GL_ASYNC, | |
1081 | gh); | |
1082 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
1083 | done = 0; | |
1084 | } | |
1085 | ||
1086 | if (signal_pending(current)) | |
1087 | error = -ERESTARTSYS; | |
1088 | } | |
1089 | ||
1090 | if (done) | |
1091 | break; | |
1092 | ||
1093 | yield(); | |
1094 | } | |
1095 | ||
9e6e0a12 SW |
1096 | kfree(gha); |
1097 | return error; | |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * gfs2_statfs_i - Do a statfs | |
1102 | * @sdp: the filesystem | |
1103 | * @sg: the sg structure | |
1104 | * | |
1105 | * Returns: errno | |
1106 | */ | |
1107 | ||
1108 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
1109 | { | |
1110 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
1111 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
1112 | ||
1113 | spin_lock(&sdp->sd_statfs_spin); | |
1114 | ||
1115 | *sc = *m_sc; | |
1116 | sc->sc_total += l_sc->sc_total; | |
1117 | sc->sc_free += l_sc->sc_free; | |
1118 | sc->sc_dinodes += l_sc->sc_dinodes; | |
1119 | ||
1120 | spin_unlock(&sdp->sd_statfs_spin); | |
1121 | ||
1122 | if (sc->sc_free < 0) | |
1123 | sc->sc_free = 0; | |
1124 | if (sc->sc_free > sc->sc_total) | |
1125 | sc->sc_free = sc->sc_total; | |
1126 | if (sc->sc_dinodes < 0) | |
1127 | sc->sc_dinodes = 0; | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | /** | |
1133 | * gfs2_statfs - Gather and return stats about the filesystem | |
1134 | * @sb: The superblock | |
1135 | * @statfsbuf: The buffer | |
1136 | * | |
1137 | * Returns: 0 on success or error code | |
1138 | */ | |
1139 | ||
1140 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | |
1141 | { | |
1142 | struct super_block *sb = dentry->d_inode->i_sb; | |
1143 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1144 | struct gfs2_statfs_change_host sc; | |
1145 | int error; | |
1146 | ||
8339ee54 SW |
1147 | error = gfs2_rindex_update(sdp); |
1148 | if (error) | |
1149 | return error; | |
1150 | ||
9e6e0a12 SW |
1151 | if (gfs2_tune_get(sdp, gt_statfs_slow)) |
1152 | error = gfs2_statfs_slow(sdp, &sc); | |
1153 | else | |
1154 | error = gfs2_statfs_i(sdp, &sc); | |
1155 | ||
1156 | if (error) | |
1157 | return error; | |
1158 | ||
1159 | buf->f_type = GFS2_MAGIC; | |
1160 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
1161 | buf->f_blocks = sc.sc_total; | |
1162 | buf->f_bfree = sc.sc_free; | |
1163 | buf->f_bavail = sc.sc_free; | |
1164 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
1165 | buf->f_ffree = sc.sc_free; | |
1166 | buf->f_namelen = GFS2_FNAMESIZE; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * gfs2_remount_fs - called when the FS is remounted | |
1173 | * @sb: the filesystem | |
1174 | * @flags: the remount flags | |
1175 | * @data: extra data passed in (not used right now) | |
1176 | * | |
1177 | * Returns: errno | |
1178 | */ | |
1179 | ||
1180 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
1181 | { | |
1182 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1183 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | |
1184 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1185 | int error; | |
1186 | ||
02b9984d TT |
1187 | sync_filesystem(sb); |
1188 | ||
9e6e0a12 | 1189 | spin_lock(>->gt_spin); |
5e687eac | 1190 | args.ar_commit = gt->gt_logd_secs; |
3d3c10f2 BM |
1191 | args.ar_quota_quantum = gt->gt_quota_quantum; |
1192 | if (gt->gt_statfs_slow) | |
1193 | args.ar_statfs_quantum = 0; | |
1194 | else | |
1195 | args.ar_statfs_quantum = gt->gt_statfs_quantum; | |
9e6e0a12 | 1196 | spin_unlock(>->gt_spin); |
f55073ff | 1197 | error = gfs2_mount_args(&args, data); |
9e6e0a12 SW |
1198 | if (error) |
1199 | return error; | |
1200 | ||
1201 | /* Not allowed to change locking details */ | |
1202 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | |
1203 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | |
1204 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | |
1205 | return -EINVAL; | |
1206 | ||
1207 | /* Some flags must not be changed */ | |
1208 | if (args_neq(&args, &sdp->sd_args, spectator) || | |
9e6e0a12 | 1209 | args_neq(&args, &sdp->sd_args, localflocks) || |
9e6e0a12 SW |
1210 | args_neq(&args, &sdp->sd_args, meta)) |
1211 | return -EINVAL; | |
1212 | ||
1213 | if (sdp->sd_args.ar_spectator) | |
1214 | *flags |= MS_RDONLY; | |
1215 | ||
1216 | if ((sb->s_flags ^ *flags) & MS_RDONLY) { | |
1217 | if (*flags & MS_RDONLY) | |
1218 | error = gfs2_make_fs_ro(sdp); | |
1219 | else | |
1220 | error = gfs2_make_fs_rw(sdp); | |
1221 | if (error) | |
1222 | return error; | |
1223 | } | |
1224 | ||
1225 | sdp->sd_args = args; | |
1226 | if (sdp->sd_args.ar_posix_acl) | |
1227 | sb->s_flags |= MS_POSIXACL; | |
1228 | else | |
1229 | sb->s_flags &= ~MS_POSIXACL; | |
f25934c5 CH |
1230 | if (sdp->sd_args.ar_nobarrier) |
1231 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
1232 | else | |
1233 | clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
9e6e0a12 | 1234 | spin_lock(>->gt_spin); |
5e687eac | 1235 | gt->gt_logd_secs = args.ar_commit; |
3d3c10f2 BM |
1236 | gt->gt_quota_quantum = args.ar_quota_quantum; |
1237 | if (args.ar_statfs_quantum) { | |
1238 | gt->gt_statfs_slow = 0; | |
1239 | gt->gt_statfs_quantum = args.ar_statfs_quantum; | |
1240 | } | |
1241 | else { | |
1242 | gt->gt_statfs_slow = 1; | |
1243 | gt->gt_statfs_quantum = 30; | |
1244 | } | |
9e6e0a12 SW |
1245 | spin_unlock(>->gt_spin); |
1246 | ||
8633ecfa | 1247 | gfs2_online_uevent(sdp); |
9e6e0a12 SW |
1248 | return 0; |
1249 | } | |
1250 | ||
1251 | /** | |
1252 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
1253 | * @inode: The inode to drop | |
1254 | * | |
1255 | * If we've received a callback on an iopen lock then its because a | |
1256 | * remote node tried to deallocate the inode but failed due to this node | |
1257 | * still having the inode open. Here we mark the link count zero | |
1258 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
1259 | * is set on the iopen glock. If we didn't do a disk read since the | |
1260 | * remote node removed the final link then we might otherwise miss | |
1261 | * this event. This check ensures that this node will deallocate the | |
1262 | * inode's blocks, or alternatively pass the baton on to another | |
1263 | * node for later deallocation. | |
1264 | */ | |
1265 | ||
45321ac5 | 1266 | static int gfs2_drop_inode(struct inode *inode) |
9e6e0a12 SW |
1267 | { |
1268 | struct gfs2_inode *ip = GFS2_I(inode); | |
1269 | ||
05978803 | 1270 | if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && inode->i_nlink) { |
9e6e0a12 SW |
1271 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
1272 | if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) | |
1273 | clear_nlink(inode); | |
1274 | } | |
45321ac5 | 1275 | return generic_drop_inode(inode); |
9e6e0a12 SW |
1276 | } |
1277 | ||
1278 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | |
1279 | { | |
1280 | do { | |
1281 | if (d1 == d2) | |
1282 | return 1; | |
1283 | d1 = d1->d_parent; | |
1284 | } while (!IS_ROOT(d1)); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | /** | |
1289 | * gfs2_show_options - Show mount options for /proc/mounts | |
1290 | * @s: seq_file structure | |
34c80b1d | 1291 | * @root: root of this (sub)tree |
9e6e0a12 SW |
1292 | * |
1293 | * Returns: 0 on success or error code | |
1294 | */ | |
1295 | ||
34c80b1d | 1296 | static int gfs2_show_options(struct seq_file *s, struct dentry *root) |
9e6e0a12 | 1297 | { |
34c80b1d | 1298 | struct gfs2_sbd *sdp = root->d_sb->s_fs_info; |
9e6e0a12 | 1299 | struct gfs2_args *args = &sdp->sd_args; |
3d3c10f2 | 1300 | int val; |
9e6e0a12 | 1301 | |
34c80b1d | 1302 | if (is_ancestor(root, sdp->sd_master_dir)) |
9e6e0a12 SW |
1303 | seq_printf(s, ",meta"); |
1304 | if (args->ar_lockproto[0]) | |
1305 | seq_printf(s, ",lockproto=%s", args->ar_lockproto); | |
1306 | if (args->ar_locktable[0]) | |
1307 | seq_printf(s, ",locktable=%s", args->ar_locktable); | |
1308 | if (args->ar_hostdata[0]) | |
1309 | seq_printf(s, ",hostdata=%s", args->ar_hostdata); | |
1310 | if (args->ar_spectator) | |
1311 | seq_printf(s, ",spectator"); | |
9e6e0a12 SW |
1312 | if (args->ar_localflocks) |
1313 | seq_printf(s, ",localflocks"); | |
9e6e0a12 SW |
1314 | if (args->ar_debug) |
1315 | seq_printf(s, ",debug"); | |
9e6e0a12 SW |
1316 | if (args->ar_posix_acl) |
1317 | seq_printf(s, ",acl"); | |
1318 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { | |
1319 | char *state; | |
1320 | switch (args->ar_quota) { | |
1321 | case GFS2_QUOTA_OFF: | |
1322 | state = "off"; | |
1323 | break; | |
1324 | case GFS2_QUOTA_ACCOUNT: | |
1325 | state = "account"; | |
1326 | break; | |
1327 | case GFS2_QUOTA_ON: | |
1328 | state = "on"; | |
1329 | break; | |
1330 | default: | |
1331 | state = "unknown"; | |
1332 | break; | |
1333 | } | |
1334 | seq_printf(s, ",quota=%s", state); | |
1335 | } | |
1336 | if (args->ar_suiddir) | |
1337 | seq_printf(s, ",suiddir"); | |
1338 | if (args->ar_data != GFS2_DATA_DEFAULT) { | |
1339 | char *state; | |
1340 | switch (args->ar_data) { | |
1341 | case GFS2_DATA_WRITEBACK: | |
1342 | state = "writeback"; | |
1343 | break; | |
1344 | case GFS2_DATA_ORDERED: | |
1345 | state = "ordered"; | |
1346 | break; | |
1347 | default: | |
1348 | state = "unknown"; | |
1349 | break; | |
1350 | } | |
1351 | seq_printf(s, ",data=%s", state); | |
1352 | } | |
1353 | if (args->ar_discard) | |
1354 | seq_printf(s, ",discard"); | |
5e687eac BM |
1355 | val = sdp->sd_tune.gt_logd_secs; |
1356 | if (val != 30) | |
3d3c10f2 BM |
1357 | seq_printf(s, ",commit=%d", val); |
1358 | val = sdp->sd_tune.gt_statfs_quantum; | |
1359 | if (val != 30) | |
1360 | seq_printf(s, ",statfs_quantum=%d", val); | |
2b9731e8 SW |
1361 | else if (sdp->sd_tune.gt_statfs_slow) |
1362 | seq_puts(s, ",statfs_quantum=0"); | |
3d3c10f2 BM |
1363 | val = sdp->sd_tune.gt_quota_quantum; |
1364 | if (val != 60) | |
1365 | seq_printf(s, ",quota_quantum=%d", val); | |
1366 | if (args->ar_statfs_percent) | |
1367 | seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); | |
d34843d0 BP |
1368 | if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
1369 | const char *state; | |
1370 | ||
1371 | switch (args->ar_errors) { | |
1372 | case GFS2_ERRORS_WITHDRAW: | |
1373 | state = "withdraw"; | |
1374 | break; | |
1375 | case GFS2_ERRORS_PANIC: | |
1376 | state = "panic"; | |
1377 | break; | |
1378 | default: | |
1379 | state = "unknown"; | |
1380 | break; | |
1381 | } | |
1382 | seq_printf(s, ",errors=%s", state); | |
1383 | } | |
cdcfde62 SW |
1384 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) |
1385 | seq_printf(s, ",nobarrier"); | |
913a71d2 SW |
1386 | if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) |
1387 | seq_printf(s, ",demote_interface_used"); | |
90306c41 BM |
1388 | if (args->ar_rgrplvb) |
1389 | seq_printf(s, ",rgrplvb"); | |
9e6e0a12 SW |
1390 | return 0; |
1391 | } | |
1392 | ||
f42ab085 SW |
1393 | static void gfs2_final_release_pages(struct gfs2_inode *ip) |
1394 | { | |
1395 | struct inode *inode = &ip->i_inode; | |
1396 | struct gfs2_glock *gl = ip->i_gl; | |
1397 | ||
1398 | truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); | |
1399 | truncate_inode_pages(&inode->i_data, 0); | |
1400 | ||
1401 | if (atomic_read(&gl->gl_revokes) == 0) { | |
1402 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
1403 | clear_bit(GLF_DIRTY, &gl->gl_flags); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | static int gfs2_dinode_dealloc(struct gfs2_inode *ip) | |
1408 | { | |
1409 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
f42ab085 | 1410 | struct gfs2_rgrpd *rgd; |
564e12b1 | 1411 | struct gfs2_holder gh; |
f42ab085 SW |
1412 | int error; |
1413 | ||
1414 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { | |
94fb763b | 1415 | gfs2_consist_inode(ip); |
f42ab085 SW |
1416 | return -EIO; |
1417 | } | |
1418 | ||
8e2e0047 BP |
1419 | error = gfs2_rindex_update(sdp); |
1420 | if (error) | |
1421 | return error; | |
f42ab085 | 1422 | |
f4108a60 | 1423 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
f42ab085 | 1424 | if (error) |
5407e242 | 1425 | return error; |
f42ab085 | 1426 | |
66fc061b | 1427 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
f42ab085 SW |
1428 | if (!rgd) { |
1429 | gfs2_consist_inode(ip); | |
1430 | error = -EIO; | |
8339ee54 | 1431 | goto out_qs; |
f42ab085 SW |
1432 | } |
1433 | ||
564e12b1 | 1434 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
f42ab085 | 1435 | if (error) |
8339ee54 | 1436 | goto out_qs; |
f42ab085 | 1437 | |
4667a0ec SW |
1438 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, |
1439 | sdp->sd_jdesc->jd_blocks); | |
f42ab085 SW |
1440 | if (error) |
1441 | goto out_rg_gunlock; | |
1442 | ||
1443 | gfs2_free_di(rgd, ip); | |
1444 | ||
1445 | gfs2_final_release_pages(ip); | |
1446 | ||
1447 | gfs2_trans_end(sdp); | |
1448 | ||
1449 | out_rg_gunlock: | |
564e12b1 | 1450 | gfs2_glock_dq_uninit(&gh); |
f42ab085 SW |
1451 | out_qs: |
1452 | gfs2_quota_unhold(ip); | |
f42ab085 SW |
1453 | return error; |
1454 | } | |
1455 | ||
380f7c65 SW |
1456 | /** |
1457 | * gfs2_evict_inode - Remove an inode from cache | |
1458 | * @inode: The inode to evict | |
1459 | * | |
1460 | * There are three cases to consider: | |
1461 | * 1. i_nlink == 0, we are final opener (and must deallocate) | |
1462 | * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) | |
1463 | * 3. i_nlink > 0 | |
1464 | * | |
1465 | * If the fs is read only, then we have to treat all cases as per #3 | |
1466 | * since we are unable to do any deallocation. The inode will be | |
1467 | * deallocated by the next read/write node to attempt an allocation | |
1468 | * in the same resource group | |
1469 | * | |
9e6e0a12 SW |
1470 | * We have to (at the moment) hold the inodes main lock to cover |
1471 | * the gap between unlocking the shared lock on the iopen lock and | |
1472 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
1473 | * conversion on the iopen lock, but we can change that later. This | |
1474 | * is safe, just less efficient. | |
1475 | */ | |
1476 | ||
d5c1515c | 1477 | static void gfs2_evict_inode(struct inode *inode) |
9e6e0a12 | 1478 | { |
001e8e8d SW |
1479 | struct super_block *sb = inode->i_sb; |
1480 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
9e6e0a12 SW |
1481 | struct gfs2_inode *ip = GFS2_I(inode); |
1482 | struct gfs2_holder gh; | |
1483 | int error; | |
1484 | ||
05978803 AD |
1485 | if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { |
1486 | clear_inode(inode); | |
1487 | return; | |
1488 | } | |
1489 | ||
001e8e8d | 1490 | if (inode->i_nlink || (sb->s_flags & MS_RDONLY)) |
d5c1515c AV |
1491 | goto out; |
1492 | ||
44ad37d6 BP |
1493 | /* Must not read inode block until block type has been verified */ |
1494 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); | |
9e6e0a12 | 1495 | if (unlikely(error)) { |
a6a4d98b | 1496 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
9e6e0a12 SW |
1497 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
1498 | goto out; | |
1499 | } | |
1500 | ||
40ac218f SW |
1501 | if (!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { |
1502 | error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); | |
1503 | if (error) | |
1504 | goto out_truncate; | |
1505 | } | |
acf7e244 | 1506 | |
44ad37d6 BP |
1507 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
1508 | error = gfs2_inode_refresh(ip); | |
1509 | if (error) | |
1510 | goto out_truncate; | |
1511 | } | |
1512 | ||
23c30108 | 1513 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
9e6e0a12 SW |
1514 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
1515 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); | |
1516 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
1517 | if (error) | |
1518 | goto out_truncate; | |
1519 | ||
380f7c65 SW |
1520 | /* Case 1 starts here */ |
1521 | ||
9e6e0a12 SW |
1522 | if (S_ISDIR(inode->i_mode) && |
1523 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | |
1524 | error = gfs2_dir_exhash_dealloc(ip); | |
1525 | if (error) | |
1526 | goto out_unlock; | |
1527 | } | |
1528 | ||
1529 | if (ip->i_eattr) { | |
1530 | error = gfs2_ea_dealloc(ip); | |
1531 | if (error) | |
1532 | goto out_unlock; | |
1533 | } | |
1534 | ||
1535 | if (!gfs2_is_stuffed(ip)) { | |
1536 | error = gfs2_file_dealloc(ip); | |
1537 | if (error) | |
1538 | goto out_unlock; | |
1539 | } | |
1540 | ||
1541 | error = gfs2_dinode_dealloc(ip); | |
f42ab085 | 1542 | goto out_unlock; |
9e6e0a12 SW |
1543 | |
1544 | out_truncate: | |
24972557 | 1545 | gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH); |
2216db70 BM |
1546 | if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { |
1547 | struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); | |
1548 | filemap_fdatawrite(metamapping); | |
1549 | filemap_fdatawait(metamapping); | |
1550 | } | |
40ac218f | 1551 | write_inode_now(inode, 1); |
b5b24d7a | 1552 | gfs2_ail_flush(ip->i_gl, 0); |
40ac218f | 1553 | |
380f7c65 | 1554 | /* Case 2 starts here */ |
9e6e0a12 SW |
1555 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
1556 | if (error) | |
1557 | goto out_unlock; | |
380f7c65 SW |
1558 | /* Needs to be done before glock release & also in a transaction */ |
1559 | truncate_inode_pages(&inode->i_data, 0); | |
9e6e0a12 SW |
1560 | gfs2_trans_end(sdp); |
1561 | ||
1562 | out_unlock: | |
380f7c65 | 1563 | /* Error path for case 1 */ |
8e2e0047 | 1564 | if (gfs2_rs_active(ip->i_res)) |
20095218 | 1565 | gfs2_rs_deltree(ip->i_res); |
8e2e0047 | 1566 | |
a6a4d98b BP |
1567 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
1568 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; | |
9e6e0a12 | 1569 | gfs2_glock_dq(&ip->i_iopen_gh); |
a6a4d98b | 1570 | } |
9e6e0a12 SW |
1571 | gfs2_holder_uninit(&ip->i_iopen_gh); |
1572 | gfs2_glock_dq_uninit(&gh); | |
1573 | if (error && error != GLR_TRYFAILED && error != -EROFS) | |
d5c1515c | 1574 | fs_warn(sdp, "gfs2_evict_inode: %d\n", error); |
9e6e0a12 | 1575 | out: |
380f7c65 | 1576 | /* Case 3 starts here */ |
91b0abe3 | 1577 | truncate_inode_pages_final(&inode->i_data); |
af5c2697 | 1578 | gfs2_rs_delete(ip, NULL); |
45138990 | 1579 | gfs2_ordered_del_inode(ip); |
dbd5768f | 1580 | clear_inode(inode); |
17d539f0 | 1581 | gfs2_dir_hash_inval(ip); |
d5c1515c | 1582 | ip->i_gl->gl_object = NULL; |
43829731 | 1583 | flush_delayed_work(&ip->i_gl->gl_work); |
29687a2a | 1584 | gfs2_glock_add_to_lru(ip->i_gl); |
d5c1515c AV |
1585 | gfs2_glock_put(ip->i_gl); |
1586 | ip->i_gl = NULL; | |
1587 | if (ip->i_iopen_gh.gh_gl) { | |
1588 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
a6a4d98b | 1589 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
d5c1515c AV |
1590 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
1591 | } | |
9e6e0a12 SW |
1592 | } |
1593 | ||
1594 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | |
1595 | { | |
1596 | struct gfs2_inode *ip; | |
1597 | ||
1598 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
1599 | if (ip) { | |
1600 | ip->i_flags = 0; | |
1601 | ip->i_gl = NULL; | |
54335b1f | 1602 | ip->i_rgd = NULL; |
0a305e49 | 1603 | ip->i_res = NULL; |
9e6e0a12 SW |
1604 | } |
1605 | return &ip->i_inode; | |
1606 | } | |
1607 | ||
fa0d7e3d | 1608 | static void gfs2_i_callback(struct rcu_head *head) |
9e6e0a12 | 1609 | { |
fa0d7e3d | 1610 | struct inode *inode = container_of(head, struct inode, i_rcu); |
9e6e0a12 SW |
1611 | kmem_cache_free(gfs2_inode_cachep, inode); |
1612 | } | |
1613 | ||
fa0d7e3d NP |
1614 | static void gfs2_destroy_inode(struct inode *inode) |
1615 | { | |
1616 | call_rcu(&inode->i_rcu, gfs2_i_callback); | |
1617 | } | |
1618 | ||
9e6e0a12 SW |
1619 | const struct super_operations gfs2_super_ops = { |
1620 | .alloc_inode = gfs2_alloc_inode, | |
1621 | .destroy_inode = gfs2_destroy_inode, | |
1622 | .write_inode = gfs2_write_inode, | |
ab9bbda0 | 1623 | .dirty_inode = gfs2_dirty_inode, |
d5c1515c | 1624 | .evict_inode = gfs2_evict_inode, |
9e6e0a12 | 1625 | .put_super = gfs2_put_super, |
9e6e0a12 SW |
1626 | .sync_fs = gfs2_sync_fs, |
1627 | .freeze_fs = gfs2_freeze, | |
1628 | .unfreeze_fs = gfs2_unfreeze, | |
1629 | .statfs = gfs2_statfs, | |
1630 | .remount_fs = gfs2_remount_fs, | |
9e6e0a12 SW |
1631 | .drop_inode = gfs2_drop_inode, |
1632 | .show_options = gfs2_show_options, | |
1633 | }; | |
1634 |