diff options
Diffstat (limited to 'fs/gfs2/ops_super.c')
-rw-r--r-- | fs/gfs2/ops_super.c | 723 |
1 files changed, 0 insertions, 723 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c deleted file mode 100644 index 458019569dcb..000000000000 --- a/fs/gfs2/ops_super.c +++ /dev/null | |||
@@ -1,723 +0,0 @@ | |||
1 | /* | ||
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | ||
3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. | ||
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 | ||
7 | * of the GNU General Public License version 2. | ||
8 | */ | ||
9 | |||
10 | #include <linux/sched.h> | ||
11 | #include <linux/slab.h> | ||
12 | #include <linux/spinlock.h> | ||
13 | #include <linux/completion.h> | ||
14 | #include <linux/buffer_head.h> | ||
15 | #include <linux/statfs.h> | ||
16 | #include <linux/seq_file.h> | ||
17 | #include <linux/mount.h> | ||
18 | #include <linux/kthread.h> | ||
19 | #include <linux/delay.h> | ||
20 | #include <linux/gfs2_ondisk.h> | ||
21 | #include <linux/crc32.h> | ||
22 | #include <linux/time.h> | ||
23 | |||
24 | #include "gfs2.h" | ||
25 | #include "incore.h" | ||
26 | #include "glock.h" | ||
27 | #include "inode.h" | ||
28 | #include "log.h" | ||
29 | #include "quota.h" | ||
30 | #include "recovery.h" | ||
31 | #include "rgrp.h" | ||
32 | #include "super.h" | ||
33 | #include "sys.h" | ||
34 | #include "util.h" | ||
35 | #include "trans.h" | ||
36 | #include "dir.h" | ||
37 | #include "eattr.h" | ||
38 | #include "bmap.h" | ||
39 | #include "meta_io.h" | ||
40 | |||
41 | #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) | ||
42 | |||
43 | /** | ||
44 | * gfs2_write_inode - Make sure the inode is stable on the disk | ||
45 | * @inode: The inode | ||
46 | * @sync: synchronous write flag | ||
47 | * | ||
48 | * Returns: errno | ||
49 | */ | ||
50 | |||
51 | static int gfs2_write_inode(struct inode *inode, int sync) | ||
52 | { | ||
53 | struct gfs2_inode *ip = GFS2_I(inode); | ||
54 | struct gfs2_sbd *sdp = GFS2_SB(inode); | ||
55 | struct gfs2_holder gh; | ||
56 | struct buffer_head *bh; | ||
57 | struct timespec atime; | ||
58 | struct gfs2_dinode *di; | ||
59 | int ret = 0; | ||
60 | |||
61 | /* Check this is a "normal" inode, etc */ | ||
62 | if (!test_bit(GIF_USER, &ip->i_flags) || | ||
63 | (current->flags & PF_MEMALLOC)) | ||
64 | return 0; | ||
65 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | ||
66 | if (ret) | ||
67 | goto do_flush; | ||
68 | ret = gfs2_trans_begin(sdp, RES_DINODE, 0); | ||
69 | if (ret) | ||
70 | goto do_unlock; | ||
71 | ret = gfs2_meta_inode_buffer(ip, &bh); | ||
72 | if (ret == 0) { | ||
73 | di = (struct gfs2_dinode *)bh->b_data; | ||
74 | atime.tv_sec = be64_to_cpu(di->di_atime); | ||
75 | atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); | ||
76 | if (timespec_compare(&inode->i_atime, &atime) > 0) { | ||
77 | gfs2_trans_add_bh(ip->i_gl, bh, 1); | ||
78 | gfs2_dinode_out(ip, bh->b_data); | ||
79 | } | ||
80 | brelse(bh); | ||
81 | } | ||
82 | gfs2_trans_end(sdp); | ||
83 | do_unlock: | ||
84 | gfs2_glock_dq_uninit(&gh); | ||
85 | do_flush: | ||
86 | if (sync != 0) | ||
87 | gfs2_log_flush(GFS2_SB(inode), ip->i_gl); | ||
88 | return ret; | ||
89 | } | ||
90 | |||
91 | /** | ||
92 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | ||
93 | * @sdp: the filesystem | ||
94 | * | ||
95 | * Returns: errno | ||
96 | */ | ||
97 | |||
98 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | ||
99 | { | ||
100 | struct gfs2_holder t_gh; | ||
101 | int error; | ||
102 | |||
103 | gfs2_quota_sync(sdp); | ||
104 | gfs2_statfs_sync(sdp); | ||
105 | |||
106 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, | ||
107 | &t_gh); | ||
108 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | ||
109 | return error; | ||
110 | |||
111 | gfs2_meta_syncfs(sdp); | ||
112 | gfs2_log_shutdown(sdp); | ||
113 | |||
114 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | ||
115 | |||
116 | if (t_gh.gh_gl) | ||
117 | gfs2_glock_dq_uninit(&t_gh); | ||
118 | |||
119 | gfs2_quota_cleanup(sdp); | ||
120 | |||
121 | return error; | ||
122 | } | ||
123 | |||
124 | /** | ||
125 | * gfs2_put_super - Unmount the filesystem | ||
126 | * @sb: The VFS superblock | ||
127 | * | ||
128 | */ | ||
129 | |||
130 | static void gfs2_put_super(struct super_block *sb) | ||
131 | { | ||
132 | struct gfs2_sbd *sdp = sb->s_fs_info; | ||
133 | int error; | ||
134 | |||
135 | /* Unfreeze the filesystem, if we need to */ | ||
136 | |||
137 | mutex_lock(&sdp->sd_freeze_lock); | ||
138 | if (sdp->sd_freeze_count) | ||
139 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | ||
140 | mutex_unlock(&sdp->sd_freeze_lock); | ||
141 | |||
142 | kthread_stop(sdp->sd_quotad_process); | ||
143 | kthread_stop(sdp->sd_logd_process); | ||
144 | kthread_stop(sdp->sd_recoverd_process); | ||
145 | |||
146 | if (!(sb->s_flags & MS_RDONLY)) { | ||
147 | error = gfs2_make_fs_ro(sdp); | ||
148 | if (error) | ||
149 | gfs2_io_error(sdp); | ||
150 | } | ||
151 | /* At this point, we're through modifying the disk */ | ||
152 | |||
153 | /* Release stuff */ | ||
154 | |||
155 | iput(sdp->sd_jindex); | ||
156 | iput(sdp->sd_inum_inode); | ||
157 | iput(sdp->sd_statfs_inode); | ||
158 | iput(sdp->sd_rindex); | ||
159 | iput(sdp->sd_quota_inode); | ||
160 | |||
161 | gfs2_glock_put(sdp->sd_rename_gl); | ||
162 | gfs2_glock_put(sdp->sd_trans_gl); | ||
163 | |||
164 | if (!sdp->sd_args.ar_spectator) { | ||
165 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | ||
166 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | ||
167 | gfs2_glock_dq_uninit(&sdp->sd_ir_gh); | ||
168 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); | ||
169 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); | ||
170 | iput(sdp->sd_ir_inode); | ||
171 | iput(sdp->sd_sc_inode); | ||
172 | iput(sdp->sd_qc_inode); | ||
173 | } | ||
174 | |||
175 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); | ||
176 | gfs2_clear_rgrpd(sdp); | ||
177 | gfs2_jindex_free(sdp); | ||
178 | /* Take apart glock structures and buffer lists */ | ||
179 | gfs2_gl_hash_clear(sdp); | ||
180 | /* Unmount the locking protocol */ | ||
181 | gfs2_lm_unmount(sdp); | ||
182 | |||
183 | /* At this point, we're through participating in the lockspace */ | ||
184 | gfs2_sys_fs_del(sdp); | ||
185 | } | ||
186 | |||
187 | /** | ||
188 | * gfs2_write_super | ||
189 | * @sb: the superblock | ||
190 | * | ||
191 | */ | ||
192 | |||
193 | static void gfs2_write_super(struct super_block *sb) | ||
194 | { | ||
195 | sb->s_dirt = 0; | ||
196 | } | ||
197 | |||
198 | /** | ||
199 | * gfs2_sync_fs - sync the filesystem | ||
200 | * @sb: the superblock | ||
201 | * | ||
202 | * Flushes the log to disk. | ||
203 | */ | ||
204 | |||
205 | static int gfs2_sync_fs(struct super_block *sb, int wait) | ||
206 | { | ||
207 | sb->s_dirt = 0; | ||
208 | if (wait && sb->s_fs_info) | ||
209 | gfs2_log_flush(sb->s_fs_info, NULL); | ||
210 | return 0; | ||
211 | } | ||
212 | |||
213 | /** | ||
214 | * gfs2_freeze - prevent further writes to the filesystem | ||
215 | * @sb: the VFS structure for the filesystem | ||
216 | * | ||
217 | */ | ||
218 | |||
219 | static int gfs2_freeze(struct super_block *sb) | ||
220 | { | ||
221 | struct gfs2_sbd *sdp = sb->s_fs_info; | ||
222 | int error; | ||
223 | |||
224 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | ||
225 | return -EINVAL; | ||
226 | |||
227 | for (;;) { | ||
228 | error = gfs2_freeze_fs(sdp); | ||
229 | if (!error) | ||
230 | break; | ||
231 | |||
232 | switch (error) { | ||
233 | case -EBUSY: | ||
234 | fs_err(sdp, "waiting for recovery before freeze\n"); | ||
235 | break; | ||
236 | |||
237 | default: | ||
238 | fs_err(sdp, "error freezing FS: %d\n", error); | ||
239 | break; | ||
240 | } | ||
241 | |||
242 | fs_err(sdp, "retrying...\n"); | ||
243 | msleep(1000); | ||
244 | } | ||
245 | return 0; | ||
246 | } | ||
247 | |||
248 | /** | ||
249 | * gfs2_unfreeze - reallow writes to the filesystem | ||
250 | * @sb: the VFS structure for the filesystem | ||
251 | * | ||
252 | */ | ||
253 | |||
254 | static int gfs2_unfreeze(struct super_block *sb) | ||
255 | { | ||
256 | gfs2_unfreeze_fs(sb->s_fs_info); | ||
257 | return 0; | ||
258 | } | ||
259 | |||
260 | /** | ||
261 | * statfs_fill - fill in the sg for a given RG | ||
262 | * @rgd: the RG | ||
263 | * @sc: the sc structure | ||
264 | * | ||
265 | * Returns: 0 on success, -ESTALE if the LVB is invalid | ||
266 | */ | ||
267 | |||
268 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | ||
269 | struct gfs2_statfs_change_host *sc) | ||
270 | { | ||
271 | gfs2_rgrp_verify(rgd); | ||
272 | sc->sc_total += rgd->rd_data; | ||
273 | sc->sc_free += rgd->rd_free; | ||
274 | sc->sc_dinodes += rgd->rd_dinodes; | ||
275 | return 0; | ||
276 | } | ||
277 | |||
278 | /** | ||
279 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | ||
280 | * @sdp: the filesystem | ||
281 | * @sc: the sc info that will be returned | ||
282 | * | ||
283 | * Any error (other than a signal) will cause this routine to fall back | ||
284 | * to the synchronous version. | ||
285 | * | ||
286 | * FIXME: This really shouldn't busy wait like this. | ||
287 | * | ||
288 | * Returns: errno | ||
289 | */ | ||
290 | |||
291 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | ||
292 | { | ||
293 | struct gfs2_holder ri_gh; | ||
294 | struct gfs2_rgrpd *rgd_next; | ||
295 | struct gfs2_holder *gha, *gh; | ||
296 | unsigned int slots = 64; | ||
297 | unsigned int x; | ||
298 | int done; | ||
299 | int error = 0, err; | ||
300 | |||
301 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | ||
302 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | ||
303 | if (!gha) | ||
304 | return -ENOMEM; | ||
305 | |||
306 | error = gfs2_rindex_hold(sdp, &ri_gh); | ||
307 | if (error) | ||
308 | goto out; | ||
309 | |||
310 | rgd_next = gfs2_rgrpd_get_first(sdp); | ||
311 | |||
312 | for (;;) { | ||
313 | done = 1; | ||
314 | |||
315 | for (x = 0; x < slots; x++) { | ||
316 | gh = gha + x; | ||
317 | |||
318 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | ||
319 | err = gfs2_glock_wait(gh); | ||
320 | if (err) { | ||
321 | gfs2_holder_uninit(gh); | ||
322 | error = err; | ||
323 | } else { | ||
324 | if (!error) | ||
325 | error = statfs_slow_fill( | ||
326 | gh->gh_gl->gl_object, sc); | ||
327 | gfs2_glock_dq_uninit(gh); | ||
328 | } | ||
329 | } | ||
330 | |||
331 | if (gh->gh_gl) | ||
332 | done = 0; | ||
333 | else if (rgd_next && !error) { | ||
334 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | ||
335 | LM_ST_SHARED, | ||
336 | GL_ASYNC, | ||
337 | gh); | ||
338 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | ||
339 | done = 0; | ||
340 | } | ||
341 | |||
342 | if (signal_pending(current)) | ||
343 | error = -ERESTARTSYS; | ||
344 | } | ||
345 | |||
346 | if (done) | ||
347 | break; | ||
348 | |||
349 | yield(); | ||
350 | } | ||
351 | |||
352 | gfs2_glock_dq_uninit(&ri_gh); | ||
353 | |||
354 | out: | ||
355 | kfree(gha); | ||
356 | return error; | ||
357 | } | ||
358 | |||
359 | /** | ||
360 | * gfs2_statfs_i - Do a statfs | ||
361 | * @sdp: the filesystem | ||
362 | * @sg: the sg structure | ||
363 | * | ||
364 | * Returns: errno | ||
365 | */ | ||
366 | |||
367 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | ||
368 | { | ||
369 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | ||
370 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | ||
371 | |||
372 | spin_lock(&sdp->sd_statfs_spin); | ||
373 | |||
374 | *sc = *m_sc; | ||
375 | sc->sc_total += l_sc->sc_total; | ||
376 | sc->sc_free += l_sc->sc_free; | ||
377 | sc->sc_dinodes += l_sc->sc_dinodes; | ||
378 | |||
379 | spin_unlock(&sdp->sd_statfs_spin); | ||
380 | |||
381 | if (sc->sc_free < 0) | ||
382 | sc->sc_free = 0; | ||
383 | if (sc->sc_free > sc->sc_total) | ||
384 | sc->sc_free = sc->sc_total; | ||
385 | if (sc->sc_dinodes < 0) | ||
386 | sc->sc_dinodes = 0; | ||
387 | |||
388 | return 0; | ||
389 | } | ||
390 | |||
391 | /** | ||
392 | * gfs2_statfs - Gather and return stats about the filesystem | ||
393 | * @sb: The superblock | ||
394 | * @statfsbuf: The buffer | ||
395 | * | ||
396 | * Returns: 0 on success or error code | ||
397 | */ | ||
398 | |||
399 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) | ||
400 | { | ||
401 | struct super_block *sb = dentry->d_inode->i_sb; | ||
402 | struct gfs2_sbd *sdp = sb->s_fs_info; | ||
403 | struct gfs2_statfs_change_host sc; | ||
404 | int error; | ||
405 | |||
406 | if (gfs2_tune_get(sdp, gt_statfs_slow)) | ||
407 | error = gfs2_statfs_slow(sdp, &sc); | ||
408 | else | ||
409 | error = gfs2_statfs_i(sdp, &sc); | ||
410 | |||
411 | if (error) | ||
412 | return error; | ||
413 | |||
414 | buf->f_type = GFS2_MAGIC; | ||
415 | buf->f_bsize = sdp->sd_sb.sb_bsize; | ||
416 | buf->f_blocks = sc.sc_total; | ||
417 | buf->f_bfree = sc.sc_free; | ||
418 | buf->f_bavail = sc.sc_free; | ||
419 | buf->f_files = sc.sc_dinodes + sc.sc_free; | ||
420 | buf->f_ffree = sc.sc_free; | ||
421 | buf->f_namelen = GFS2_FNAMESIZE; | ||
422 | |||
423 | return 0; | ||
424 | } | ||
425 | |||
426 | /** | ||
427 | * gfs2_remount_fs - called when the FS is remounted | ||
428 | * @sb: the filesystem | ||
429 | * @flags: the remount flags | ||
430 | * @data: extra data passed in (not used right now) | ||
431 | * | ||
432 | * Returns: errno | ||
433 | */ | ||
434 | |||
435 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | ||
436 | { | ||
437 | struct gfs2_sbd *sdp = sb->s_fs_info; | ||
438 | struct gfs2_args args = sdp->sd_args; /* Default to current settings */ | ||
439 | int error; | ||
440 | |||
441 | error = gfs2_mount_args(sdp, &args, data); | ||
442 | if (error) | ||
443 | return error; | ||
444 | |||
445 | /* Not allowed to change locking details */ | ||
446 | if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || | ||
447 | strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || | ||
448 | strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) | ||
449 | return -EINVAL; | ||
450 | |||
451 | /* Some flags must not be changed */ | ||
452 | if (args_neq(&args, &sdp->sd_args, spectator) || | ||
453 | args_neq(&args, &sdp->sd_args, ignore_local_fs) || | ||
454 | args_neq(&args, &sdp->sd_args, localflocks) || | ||
455 | args_neq(&args, &sdp->sd_args, localcaching) || | ||
456 | args_neq(&args, &sdp->sd_args, meta)) | ||
457 | return -EINVAL; | ||
458 | |||
459 | if (sdp->sd_args.ar_spectator) | ||
460 | *flags |= MS_RDONLY; | ||
461 | |||
462 | if ((sb->s_flags ^ *flags) & MS_RDONLY) { | ||
463 | if (*flags & MS_RDONLY) | ||
464 | error = gfs2_make_fs_ro(sdp); | ||
465 | else | ||
466 | error = gfs2_make_fs_rw(sdp); | ||
467 | if (error) | ||
468 | return error; | ||
469 | } | ||
470 | |||
471 | sdp->sd_args = args; | ||
472 | if (sdp->sd_args.ar_posix_acl) | ||
473 | sb->s_flags |= MS_POSIXACL; | ||
474 | else | ||
475 | sb->s_flags &= ~MS_POSIXACL; | ||
476 | return 0; | ||
477 | } | ||
478 | |||
479 | /** | ||
480 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | ||
481 | * @inode: The inode to drop | ||
482 | * | ||
483 | * If we've received a callback on an iopen lock then its because a | ||
484 | * remote node tried to deallocate the inode but failed due to this node | ||
485 | * still having the inode open. Here we mark the link count zero | ||
486 | * since we know that it must have reached zero if the GLF_DEMOTE flag | ||
487 | * is set on the iopen glock. If we didn't do a disk read since the | ||
488 | * remote node removed the final link then we might otherwise miss | ||
489 | * this event. This check ensures that this node will deallocate the | ||
490 | * inode's blocks, or alternatively pass the baton on to another | ||
491 | * node for later deallocation. | ||
492 | */ | ||
493 | |||
494 | static void gfs2_drop_inode(struct inode *inode) | ||
495 | { | ||
496 | struct gfs2_inode *ip = GFS2_I(inode); | ||
497 | |||
498 | if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { | ||
499 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; | ||
500 | if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) | ||
501 | clear_nlink(inode); | ||
502 | } | ||
503 | generic_drop_inode(inode); | ||
504 | } | ||
505 | |||
506 | /** | ||
507 | * gfs2_clear_inode - Deallocate an inode when VFS is done with it | ||
508 | * @inode: The VFS inode | ||
509 | * | ||
510 | */ | ||
511 | |||
512 | static void gfs2_clear_inode(struct inode *inode) | ||
513 | { | ||
514 | struct gfs2_inode *ip = GFS2_I(inode); | ||
515 | |||
516 | /* This tells us its a "real" inode and not one which only | ||
517 | * serves to contain an address space (see rgrp.c, meta_io.c) | ||
518 | * which therefore doesn't have its own glocks. | ||
519 | */ | ||
520 | if (test_bit(GIF_USER, &ip->i_flags)) { | ||
521 | ip->i_gl->gl_object = NULL; | ||
522 | gfs2_glock_put(ip->i_gl); | ||
523 | ip->i_gl = NULL; | ||
524 | if (ip->i_iopen_gh.gh_gl) { | ||
525 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | ||
526 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | ||
527 | } | ||
528 | } | ||
529 | } | ||
530 | |||
531 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) | ||
532 | { | ||
533 | do { | ||
534 | if (d1 == d2) | ||
535 | return 1; | ||
536 | d1 = d1->d_parent; | ||
537 | } while (!IS_ROOT(d1)); | ||
538 | return 0; | ||
539 | } | ||
540 | |||
541 | /** | ||
542 | * gfs2_show_options - Show mount options for /proc/mounts | ||
543 | * @s: seq_file structure | ||
544 | * @mnt: vfsmount | ||
545 | * | ||
546 | * Returns: 0 on success or error code | ||
547 | */ | ||
548 | |||
549 | static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) | ||
550 | { | ||
551 | struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; | ||
552 | struct gfs2_args *args = &sdp->sd_args; | ||
553 | |||
554 | if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) | ||
555 | seq_printf(s, ",meta"); | ||
556 | if (args->ar_lockproto[0]) | ||
557 | seq_printf(s, ",lockproto=%s", args->ar_lockproto); | ||
558 | if (args->ar_locktable[0]) | ||
559 | seq_printf(s, ",locktable=%s", args->ar_locktable); | ||
560 | if (args->ar_hostdata[0]) | ||
561 | seq_printf(s, ",hostdata=%s", args->ar_hostdata); | ||
562 | if (args->ar_spectator) | ||
563 | seq_printf(s, ",spectator"); | ||
564 | if (args->ar_ignore_local_fs) | ||
565 | seq_printf(s, ",ignore_local_fs"); | ||
566 | if (args->ar_localflocks) | ||
567 | seq_printf(s, ",localflocks"); | ||
568 | if (args->ar_localcaching) | ||
569 | seq_printf(s, ",localcaching"); | ||
570 | if (args->ar_debug) | ||
571 | seq_printf(s, ",debug"); | ||
572 | if (args->ar_upgrade) | ||
573 | seq_printf(s, ",upgrade"); | ||
574 | if (args->ar_posix_acl) | ||
575 | seq_printf(s, ",acl"); | ||
576 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { | ||
577 | char *state; | ||
578 | switch (args->ar_quota) { | ||
579 | case GFS2_QUOTA_OFF: | ||
580 | state = "off"; | ||
581 | break; | ||
582 | case GFS2_QUOTA_ACCOUNT: | ||
583 | state = "account"; | ||
584 | break; | ||
585 | case GFS2_QUOTA_ON: | ||
586 | state = "on"; | ||
587 | break; | ||
588 | default: | ||
589 | state = "unknown"; | ||
590 | break; | ||
591 | } | ||
592 | seq_printf(s, ",quota=%s", state); | ||
593 | } | ||
594 | if (args->ar_suiddir) | ||
595 | seq_printf(s, ",suiddir"); | ||
596 | if (args->ar_data != GFS2_DATA_DEFAULT) { | ||
597 | char *state; | ||
598 | switch (args->ar_data) { | ||
599 | case GFS2_DATA_WRITEBACK: | ||
600 | state = "writeback"; | ||
601 | break; | ||
602 | case GFS2_DATA_ORDERED: | ||
603 | state = "ordered"; | ||
604 | break; | ||
605 | default: | ||
606 | state = "unknown"; | ||
607 | break; | ||
608 | } | ||
609 | seq_printf(s, ",data=%s", state); | ||
610 | } | ||
611 | if (args->ar_discard) | ||
612 | seq_printf(s, ",discard"); | ||
613 | |||
614 | return 0; | ||
615 | } | ||
616 | |||
617 | /* | ||
618 | * We have to (at the moment) hold the inodes main lock to cover | ||
619 | * the gap between unlocking the shared lock on the iopen lock and | ||
620 | * taking the exclusive lock. I'd rather do a shared -> exclusive | ||
621 | * conversion on the iopen lock, but we can change that later. This | ||
622 | * is safe, just less efficient. | ||
623 | */ | ||
624 | |||
625 | static void gfs2_delete_inode(struct inode *inode) | ||
626 | { | ||
627 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; | ||
628 | struct gfs2_inode *ip = GFS2_I(inode); | ||
629 | struct gfs2_holder gh; | ||
630 | int error; | ||
631 | |||
632 | if (!test_bit(GIF_USER, &ip->i_flags)) | ||
633 | goto out; | ||
634 | |||
635 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | ||
636 | if (unlikely(error)) { | ||
637 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | ||
638 | goto out; | ||
639 | } | ||
640 | |||
641 | gfs2_glock_dq_wait(&ip->i_iopen_gh); | ||
642 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); | ||
643 | error = gfs2_glock_nq(&ip->i_iopen_gh); | ||
644 | if (error) | ||
645 | goto out_truncate; | ||
646 | |||
647 | if (S_ISDIR(inode->i_mode) && | ||
648 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { | ||
649 | error = gfs2_dir_exhash_dealloc(ip); | ||
650 | if (error) | ||
651 | goto out_unlock; | ||
652 | } | ||
653 | |||
654 | if (ip->i_eattr) { | ||
655 | error = gfs2_ea_dealloc(ip); | ||
656 | if (error) | ||
657 | goto out_unlock; | ||
658 | } | ||
659 | |||
660 | if (!gfs2_is_stuffed(ip)) { | ||
661 | error = gfs2_file_dealloc(ip); | ||
662 | if (error) | ||
663 | goto out_unlock; | ||
664 | } | ||
665 | |||
666 | error = gfs2_dinode_dealloc(ip); | ||
667 | if (error) | ||
668 | goto out_unlock; | ||
669 | |||
670 | out_truncate: | ||
671 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); | ||
672 | if (error) | ||
673 | goto out_unlock; | ||
674 | /* Needs to be done before glock release & also in a transaction */ | ||
675 | truncate_inode_pages(&inode->i_data, 0); | ||
676 | gfs2_trans_end(sdp); | ||
677 | |||
678 | out_unlock: | ||
679 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) | ||
680 | gfs2_glock_dq(&ip->i_iopen_gh); | ||
681 | gfs2_holder_uninit(&ip->i_iopen_gh); | ||
682 | gfs2_glock_dq_uninit(&gh); | ||
683 | if (error && error != GLR_TRYFAILED) | ||
684 | fs_warn(sdp, "gfs2_delete_inode: %d\n", error); | ||
685 | out: | ||
686 | truncate_inode_pages(&inode->i_data, 0); | ||
687 | clear_inode(inode); | ||
688 | } | ||
689 | |||
690 | static struct inode *gfs2_alloc_inode(struct super_block *sb) | ||
691 | { | ||
692 | struct gfs2_inode *ip; | ||
693 | |||
694 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | ||
695 | if (ip) { | ||
696 | ip->i_flags = 0; | ||
697 | ip->i_gl = NULL; | ||
698 | } | ||
699 | return &ip->i_inode; | ||
700 | } | ||
701 | |||
702 | static void gfs2_destroy_inode(struct inode *inode) | ||
703 | { | ||
704 | kmem_cache_free(gfs2_inode_cachep, inode); | ||
705 | } | ||
706 | |||
707 | const struct super_operations gfs2_super_ops = { | ||
708 | .alloc_inode = gfs2_alloc_inode, | ||
709 | .destroy_inode = gfs2_destroy_inode, | ||
710 | .write_inode = gfs2_write_inode, | ||
711 | .delete_inode = gfs2_delete_inode, | ||
712 | .put_super = gfs2_put_super, | ||
713 | .write_super = gfs2_write_super, | ||
714 | .sync_fs = gfs2_sync_fs, | ||
715 | .freeze_fs = gfs2_freeze, | ||
716 | .unfreeze_fs = gfs2_unfreeze, | ||
717 | .statfs = gfs2_statfs, | ||
718 | .remount_fs = gfs2_remount_fs, | ||
719 | .clear_inode = gfs2_clear_inode, | ||
720 | .drop_inode = gfs2_drop_inode, | ||
721 | .show_options = gfs2_show_options, | ||
722 | }; | ||
723 | |||