Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
091806ed | 3 | * Copyright (C) 2004-2008 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 | ||
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> | |
b3b94faa DT |
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> | |
5c676f6d | 20 | #include <linux/gfs2_ondisk.h> |
feaa7bba | 21 | #include <linux/crc32.h> |
7d308590 | 22 | #include <linux/lm_interface.h> |
719ee344 | 23 | #include <linux/time.h> |
b3b94faa DT |
24 | |
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
b3b94faa DT |
27 | #include "glock.h" |
28 | #include "inode.h" | |
b3b94faa DT |
29 | #include "log.h" |
30 | #include "mount.h" | |
b3b94faa DT |
31 | #include "quota.h" |
32 | #include "recovery.h" | |
33 | #include "rgrp.h" | |
34 | #include "super.h" | |
35 | #include "sys.h" | |
5c676f6d | 36 | #include "util.h" |
feaa7bba SW |
37 | #include "trans.h" |
38 | #include "dir.h" | |
39 | #include "eattr.h" | |
40 | #include "bmap.h" | |
719ee344 | 41 | #include "meta_io.h" |
b3b94faa DT |
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 | { | |
feaa7bba | 53 | struct gfs2_inode *ip = GFS2_I(inode); |
719ee344 SW |
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); | |
feaa7bba | 81 | } |
719ee344 SW |
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; | |
b3b94faa DT |
89 | } |
90 | ||
9b8df98f SW |
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 | ||
fefc03bf | 98 | static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) |
9b8df98f SW |
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 | ||
fefc03bf SW |
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); | |
fefc03bf SW |
185 | } |
186 | ||
b3b94faa | 187 | /** |
4a221953 SW |
188 | * gfs2_write_super |
189 | * @sb: the superblock | |
b3b94faa | 190 | * |
b3b94faa DT |
191 | */ |
192 | ||
193 | static void gfs2_write_super(struct super_block *sb) | |
194 | { | |
4a221953 SW |
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 | */ | |
9b8df98f | 204 | |
4a221953 SW |
205 | static int gfs2_sync_fs(struct super_block *sb, int wait) |
206 | { | |
207 | sb->s_dirt = 0; | |
9171f5a9 | 208 | if (wait && sb->s_fs_info) |
b004157a | 209 | gfs2_log_flush(sb->s_fs_info, NULL); |
4a221953 | 210 | return 0; |
b3b94faa DT |
211 | } |
212 | ||
213 | /** | |
214 | * gfs2_write_super_lockfs - prevent further writes to the filesystem | |
215 | * @sb: the VFS structure for the filesystem | |
216 | * | |
217 | */ | |
218 | ||
219 | static void gfs2_write_super_lockfs(struct super_block *sb) | |
220 | { | |
5c676f6d | 221 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
222 | int error; |
223 | ||
c3780511 DT |
224 | if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
225 | return; | |
226 | ||
b3b94faa DT |
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 | } | |
246 | ||
247 | /** | |
248 | * gfs2_unlockfs - reallow writes to the filesystem | |
249 | * @sb: the VFS structure for the filesystem | |
250 | * | |
251 | */ | |
252 | ||
253 | static void gfs2_unlockfs(struct super_block *sb) | |
254 | { | |
2bdbc5d7 | 255 | gfs2_unfreeze_fs(sb->s_fs_info); |
b3b94faa DT |
256 | } |
257 | ||
2bfb6449 SW |
258 | /** |
259 | * statfs_fill - fill in the sg for a given RG | |
260 | * @rgd: the RG | |
261 | * @sc: the sc structure | |
262 | * | |
263 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
264 | */ | |
265 | ||
266 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
267 | struct gfs2_statfs_change_host *sc) | |
268 | { | |
269 | gfs2_rgrp_verify(rgd); | |
270 | sc->sc_total += rgd->rd_data; | |
271 | sc->sc_free += rgd->rd_free; | |
272 | sc->sc_dinodes += rgd->rd_dinodes; | |
273 | return 0; | |
274 | } | |
275 | ||
276 | /** | |
277 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
278 | * @sdp: the filesystem | |
279 | * @sc: the sc info that will be returned | |
280 | * | |
281 | * Any error (other than a signal) will cause this routine to fall back | |
282 | * to the synchronous version. | |
283 | * | |
284 | * FIXME: This really shouldn't busy wait like this. | |
285 | * | |
286 | * Returns: errno | |
287 | */ | |
288 | ||
289 | static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
290 | { | |
291 | struct gfs2_holder ri_gh; | |
292 | struct gfs2_rgrpd *rgd_next; | |
293 | struct gfs2_holder *gha, *gh; | |
294 | unsigned int slots = 64; | |
295 | unsigned int x; | |
296 | int done; | |
297 | int error = 0, err; | |
298 | ||
299 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); | |
300 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); | |
301 | if (!gha) | |
302 | return -ENOMEM; | |
303 | ||
304 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
305 | if (error) | |
306 | goto out; | |
307 | ||
308 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
309 | ||
310 | for (;;) { | |
311 | done = 1; | |
312 | ||
313 | for (x = 0; x < slots; x++) { | |
314 | gh = gha + x; | |
315 | ||
316 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
317 | err = gfs2_glock_wait(gh); | |
318 | if (err) { | |
319 | gfs2_holder_uninit(gh); | |
320 | error = err; | |
321 | } else { | |
322 | if (!error) | |
323 | error = statfs_slow_fill( | |
324 | gh->gh_gl->gl_object, sc); | |
325 | gfs2_glock_dq_uninit(gh); | |
326 | } | |
327 | } | |
328 | ||
329 | if (gh->gh_gl) | |
330 | done = 0; | |
331 | else if (rgd_next && !error) { | |
332 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
333 | LM_ST_SHARED, | |
334 | GL_ASYNC, | |
335 | gh); | |
336 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
337 | done = 0; | |
338 | } | |
339 | ||
340 | if (signal_pending(current)) | |
341 | error = -ERESTARTSYS; | |
342 | } | |
343 | ||
344 | if (done) | |
345 | break; | |
346 | ||
347 | yield(); | |
348 | } | |
349 | ||
350 | gfs2_glock_dq_uninit(&ri_gh); | |
351 | ||
352 | out: | |
353 | kfree(gha); | |
354 | return error; | |
355 | } | |
356 | ||
357 | /** | |
358 | * gfs2_statfs_i - Do a statfs | |
359 | * @sdp: the filesystem | |
360 | * @sg: the sg structure | |
361 | * | |
362 | * Returns: errno | |
363 | */ | |
364 | ||
365 | static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) | |
366 | { | |
367 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; | |
368 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
369 | ||
370 | spin_lock(&sdp->sd_statfs_spin); | |
371 | ||
372 | *sc = *m_sc; | |
373 | sc->sc_total += l_sc->sc_total; | |
374 | sc->sc_free += l_sc->sc_free; | |
375 | sc->sc_dinodes += l_sc->sc_dinodes; | |
376 | ||
377 | spin_unlock(&sdp->sd_statfs_spin); | |
378 | ||
379 | if (sc->sc_free < 0) | |
380 | sc->sc_free = 0; | |
381 | if (sc->sc_free > sc->sc_total) | |
382 | sc->sc_free = sc->sc_total; | |
383 | if (sc->sc_dinodes < 0) | |
384 | sc->sc_dinodes = 0; | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
b3b94faa DT |
389 | /** |
390 | * gfs2_statfs - Gather and return stats about the filesystem | |
391 | * @sb: The superblock | |
392 | * @statfsbuf: The buffer | |
393 | * | |
394 | * Returns: 0 on success or error code | |
395 | */ | |
396 | ||
0c0834a3 | 397 | static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) |
b3b94faa | 398 | { |
0c0834a3 | 399 | struct super_block *sb = dentry->d_inode->i_sb; |
5c676f6d | 400 | struct gfs2_sbd *sdp = sb->s_fs_info; |
bd209cc0 | 401 | struct gfs2_statfs_change_host sc; |
b3b94faa DT |
402 | int error; |
403 | ||
b3b94faa DT |
404 | if (gfs2_tune_get(sdp, gt_statfs_slow)) |
405 | error = gfs2_statfs_slow(sdp, &sc); | |
406 | else | |
407 | error = gfs2_statfs_i(sdp, &sc); | |
408 | ||
409 | if (error) | |
410 | return error; | |
411 | ||
b3b94faa DT |
412 | buf->f_type = GFS2_MAGIC; |
413 | buf->f_bsize = sdp->sd_sb.sb_bsize; | |
414 | buf->f_blocks = sc.sc_total; | |
415 | buf->f_bfree = sc.sc_free; | |
416 | buf->f_bavail = sc.sc_free; | |
417 | buf->f_files = sc.sc_dinodes + sc.sc_free; | |
418 | buf->f_ffree = sc.sc_free; | |
419 | buf->f_namelen = GFS2_FNAMESIZE; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /** | |
425 | * gfs2_remount_fs - called when the FS is remounted | |
426 | * @sb: the filesystem | |
427 | * @flags: the remount flags | |
428 | * @data: extra data passed in (not used right now) | |
429 | * | |
430 | * Returns: errno | |
431 | */ | |
432 | ||
433 | static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) | |
434 | { | |
5c676f6d | 435 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
436 | int error; |
437 | ||
b3b94faa DT |
438 | error = gfs2_mount_args(sdp, data, 1); |
439 | if (error) | |
440 | return error; | |
441 | ||
442 | if (sdp->sd_args.ar_spectator) | |
443 | *flags |= MS_RDONLY; | |
444 | else { | |
445 | if (*flags & MS_RDONLY) { | |
446 | if (!(sb->s_flags & MS_RDONLY)) | |
447 | error = gfs2_make_fs_ro(sdp); | |
448 | } else if (!(*flags & MS_RDONLY) && | |
449 | (sb->s_flags & MS_RDONLY)) { | |
450 | error = gfs2_make_fs_rw(sdp); | |
451 | } | |
452 | } | |
453 | ||
b3b94faa DT |
454 | return error; |
455 | } | |
456 | ||
3b8249f6 SW |
457 | /** |
458 | * gfs2_drop_inode - Drop an inode (test for remote unlink) | |
459 | * @inode: The inode to drop | |
460 | * | |
461 | * If we've received a callback on an iopen lock then its because a | |
462 | * remote node tried to deallocate the inode but failed due to this node | |
463 | * still having the inode open. Here we mark the link count zero | |
464 | * since we know that it must have reached zero if the GLF_DEMOTE flag | |
465 | * is set on the iopen glock. If we didn't do a disk read since the | |
466 | * remote node removed the final link then we might otherwise miss | |
467 | * this event. This check ensures that this node will deallocate the | |
468 | * inode's blocks, or alternatively pass the baton on to another | |
469 | * node for later deallocation. | |
470 | */ | |
9b8df98f | 471 | |
3b8249f6 SW |
472 | static void gfs2_drop_inode(struct inode *inode) |
473 | { | |
091806ed BP |
474 | struct gfs2_inode *ip = GFS2_I(inode); |
475 | ||
476 | if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { | |
3b8249f6 SW |
477 | struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
478 | if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) | |
479 | clear_nlink(inode); | |
480 | } | |
481 | generic_drop_inode(inode); | |
482 | } | |
483 | ||
b3b94faa DT |
484 | /** |
485 | * gfs2_clear_inode - Deallocate an inode when VFS is done with it | |
486 | * @inode: The VFS inode | |
487 | * | |
488 | */ | |
489 | ||
490 | static void gfs2_clear_inode(struct inode *inode) | |
491 | { | |
091806ed BP |
492 | struct gfs2_inode *ip = GFS2_I(inode); |
493 | ||
feaa7bba SW |
494 | /* This tells us its a "real" inode and not one which only |
495 | * serves to contain an address space (see rgrp.c, meta_io.c) | |
496 | * which therefore doesn't have its own glocks. | |
497 | */ | |
091806ed | 498 | if (test_bit(GIF_USER, &ip->i_flags)) { |
feaa7bba | 499 | ip->i_gl->gl_object = NULL; |
feaa7bba SW |
500 | gfs2_glock_put(ip->i_gl); |
501 | ip->i_gl = NULL; | |
d93cfa98 AD |
502 | if (ip->i_iopen_gh.gh_gl) { |
503 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
feaa7bba | 504 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
d93cfa98 | 505 | } |
b3b94faa DT |
506 | } |
507 | } | |
508 | ||
9b8df98f SW |
509 | static int is_ancestor(const struct dentry *d1, const struct dentry *d2) |
510 | { | |
511 | do { | |
512 | if (d1 == d2) | |
513 | return 1; | |
514 | d1 = d1->d_parent; | |
515 | } while (!IS_ROOT(d1)); | |
516 | return 0; | |
517 | } | |
518 | ||
b3b94faa DT |
519 | /** |
520 | * gfs2_show_options - Show mount options for /proc/mounts | |
521 | * @s: seq_file structure | |
522 | * @mnt: vfsmount | |
523 | * | |
524 | * Returns: 0 on success or error code | |
525 | */ | |
526 | ||
527 | static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) | |
528 | { | |
5c676f6d | 529 | struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; |
b3b94faa DT |
530 | struct gfs2_args *args = &sdp->sd_args; |
531 | ||
9b8df98f SW |
532 | if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) |
533 | seq_printf(s, ",meta"); | |
b3b94faa DT |
534 | if (args->ar_lockproto[0]) |
535 | seq_printf(s, ",lockproto=%s", args->ar_lockproto); | |
536 | if (args->ar_locktable[0]) | |
537 | seq_printf(s, ",locktable=%s", args->ar_locktable); | |
538 | if (args->ar_hostdata[0]) | |
539 | seq_printf(s, ",hostdata=%s", args->ar_hostdata); | |
540 | if (args->ar_spectator) | |
541 | seq_printf(s, ",spectator"); | |
542 | if (args->ar_ignore_local_fs) | |
543 | seq_printf(s, ",ignore_local_fs"); | |
544 | if (args->ar_localflocks) | |
545 | seq_printf(s, ",localflocks"); | |
546 | if (args->ar_localcaching) | |
547 | seq_printf(s, ",localcaching"); | |
548 | if (args->ar_debug) | |
549 | seq_printf(s, ",debug"); | |
550 | if (args->ar_upgrade) | |
551 | seq_printf(s, ",upgrade"); | |
b3b94faa DT |
552 | if (args->ar_posix_acl) |
553 | seq_printf(s, ",acl"); | |
554 | if (args->ar_quota != GFS2_QUOTA_DEFAULT) { | |
555 | char *state; | |
556 | switch (args->ar_quota) { | |
557 | case GFS2_QUOTA_OFF: | |
558 | state = "off"; | |
559 | break; | |
560 | case GFS2_QUOTA_ACCOUNT: | |
561 | state = "account"; | |
562 | break; | |
563 | case GFS2_QUOTA_ON: | |
564 | state = "on"; | |
565 | break; | |
566 | default: | |
567 | state = "unknown"; | |
568 | break; | |
569 | } | |
570 | seq_printf(s, ",quota=%s", state); | |
571 | } | |
572 | if (args->ar_suiddir) | |
573 | seq_printf(s, ",suiddir"); | |
574 | if (args->ar_data != GFS2_DATA_DEFAULT) { | |
575 | char *state; | |
576 | switch (args->ar_data) { | |
577 | case GFS2_DATA_WRITEBACK: | |
578 | state = "writeback"; | |
579 | break; | |
580 | case GFS2_DATA_ORDERED: | |
581 | state = "ordered"; | |
582 | break; | |
583 | default: | |
584 | state = "unknown"; | |
585 | break; | |
586 | } | |
587 | seq_printf(s, ",data=%s", state); | |
588 | } | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
907b9bce | 593 | /* |
feaa7bba SW |
594 | * We have to (at the moment) hold the inodes main lock to cover |
595 | * the gap between unlocking the shared lock on the iopen lock and | |
596 | * taking the exclusive lock. I'd rather do a shared -> exclusive | |
597 | * conversion on the iopen lock, but we can change that later. This | |
598 | * is safe, just less efficient. | |
599 | */ | |
9b8df98f | 600 | |
feaa7bba SW |
601 | static void gfs2_delete_inode(struct inode *inode) |
602 | { | |
603 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; | |
604 | struct gfs2_inode *ip = GFS2_I(inode); | |
605 | struct gfs2_holder gh; | |
606 | int error; | |
607 | ||
091806ed | 608 | if (!test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba SW |
609 | goto out; |
610 | ||
d93cfa98 | 611 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
feaa7bba SW |
612 | if (unlikely(error)) { |
613 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
614 | goto out; | |
615 | } | |
616 | ||
d93cfa98 | 617 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
feaa7bba SW |
618 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); |
619 | error = gfs2_glock_nq(&ip->i_iopen_gh); | |
620 | if (error) | |
1bb7322f | 621 | goto out_truncate; |
feaa7bba | 622 | |
b60623c2 | 623 | if (S_ISDIR(inode->i_mode) && |
383f01fb | 624 | (ip->i_diskflags & GFS2_DIF_EXHASH)) { |
feaa7bba SW |
625 | error = gfs2_dir_exhash_dealloc(ip); |
626 | if (error) | |
627 | goto out_unlock; | |
628 | } | |
629 | ||
3767ac21 | 630 | if (ip->i_eattr) { |
feaa7bba SW |
631 | error = gfs2_ea_dealloc(ip); |
632 | if (error) | |
633 | goto out_unlock; | |
634 | } | |
635 | ||
636 | if (!gfs2_is_stuffed(ip)) { | |
637 | error = gfs2_file_dealloc(ip); | |
638 | if (error) | |
639 | goto out_unlock; | |
640 | } | |
641 | ||
642 | error = gfs2_dinode_dealloc(ip); | |
16615be1 SW |
643 | if (error) |
644 | goto out_unlock; | |
645 | ||
1bb7322f | 646 | out_truncate: |
16615be1 SW |
647 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
648 | if (error) | |
649 | goto out_unlock; | |
650 | /* Needs to be done before glock release & also in a transaction */ | |
49686f71 | 651 | truncate_inode_pages(&inode->i_data, 0); |
16615be1 | 652 | gfs2_trans_end(sdp); |
feaa7bba SW |
653 | |
654 | out_unlock: | |
1bb7322f SW |
655 | if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) |
656 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
657 | gfs2_holder_uninit(&ip->i_iopen_gh); |
658 | gfs2_glock_dq_uninit(&gh); | |
3b8249f6 | 659 | if (error && error != GLR_TRYFAILED) |
feaa7bba SW |
660 | fs_warn(sdp, "gfs2_delete_inode: %d\n", error); |
661 | out: | |
662 | truncate_inode_pages(&inode->i_data, 0); | |
663 | clear_inode(inode); | |
664 | } | |
665 | ||
320dd101 SW |
666 | static struct inode *gfs2_alloc_inode(struct super_block *sb) |
667 | { | |
320dd101 SW |
668 | struct gfs2_inode *ip; |
669 | ||
670 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
671 | if (ip) { | |
672 | ip->i_flags = 0; | |
673 | ip->i_gl = NULL; | |
320dd101 SW |
674 | } |
675 | return &ip->i_inode; | |
676 | } | |
677 | ||
678 | static void gfs2_destroy_inode(struct inode *inode) | |
679 | { | |
680 | kmem_cache_free(gfs2_inode_cachep, inode); | |
681 | } | |
682 | ||
ee9b6d61 | 683 | const struct super_operations gfs2_super_ops = { |
4a221953 SW |
684 | .alloc_inode = gfs2_alloc_inode, |
685 | .destroy_inode = gfs2_destroy_inode, | |
686 | .write_inode = gfs2_write_inode, | |
687 | .delete_inode = gfs2_delete_inode, | |
fefc03bf | 688 | .put_super = gfs2_put_super, |
4a221953 SW |
689 | .write_super = gfs2_write_super, |
690 | .sync_fs = gfs2_sync_fs, | |
691 | .write_super_lockfs = gfs2_write_super_lockfs, | |
692 | .unlockfs = gfs2_unlockfs, | |
693 | .statfs = gfs2_statfs, | |
694 | .remount_fs = gfs2_remount_fs, | |
695 | .clear_inode = gfs2_clear_inode, | |
3b8249f6 | 696 | .drop_inode = gfs2_drop_inode, |
4a221953 | 697 | .show_options = gfs2_show_options, |
b3b94faa DT |
698 | }; |
699 |