Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * Copyright (c) 2000-2006 Silicon Graphics, Inc.
4 : * All Rights Reserved.
5 : */
6 :
7 : #include "xfs.h"
8 : #include "xfs_shared.h"
9 : #include "xfs_format.h"
10 : #include "xfs_log_format.h"
11 : #include "xfs_trans_resv.h"
12 : #include "xfs_sb.h"
13 : #include "xfs_mount.h"
14 : #include "xfs_inode.h"
15 : #include "xfs_btree.h"
16 : #include "xfs_bmap.h"
17 : #include "xfs_alloc.h"
18 : #include "xfs_fsops.h"
19 : #include "xfs_trans.h"
20 : #include "xfs_buf_item.h"
21 : #include "xfs_log.h"
22 : #include "xfs_log_priv.h"
23 : #include "xfs_dir2.h"
24 : #include "xfs_extfree_item.h"
25 : #include "xfs_mru_cache.h"
26 : #include "xfs_inode_item.h"
27 : #include "xfs_icache.h"
28 : #include "xfs_trace.h"
29 : #include "xfs_icreate_item.h"
30 : #include "xfs_filestream.h"
31 : #include "xfs_quota.h"
32 : #include "xfs_sysfs.h"
33 : #include "xfs_ondisk.h"
34 : #include "xfs_rmap_item.h"
35 : #include "xfs_refcount_item.h"
36 : #include "xfs_bmap_item.h"
37 : #include "xfs_reflink.h"
38 : #include "xfs_pwork.h"
39 : #include "xfs_ag.h"
40 : #include "xfs_defer.h"
41 : #include "xfs_attr_item.h"
42 : #include "xfs_xattr.h"
43 : #include "xfs_iunlink_item.h"
44 : #include "xfs_dahash_test.h"
45 :
46 : #include <linux/magic.h>
47 : #include <linux/fs_context.h>
48 : #include <linux/fs_parser.h>
49 :
50 : static const struct super_operations xfs_super_operations;
51 :
52 : static struct kset *xfs_kset; /* top-level xfs sysfs dir */
53 : #ifdef DEBUG
54 : static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
55 : #endif
56 :
57 : #ifdef CONFIG_HOTPLUG_CPU
58 : static LIST_HEAD(xfs_mount_list);
59 : static DEFINE_SPINLOCK(xfs_mount_list_lock);
60 :
61 22534 : static inline void xfs_mount_list_add(struct xfs_mount *mp)
62 : {
63 22534 : spin_lock(&xfs_mount_list_lock);
64 22534 : list_add(&mp->m_mount_list, &xfs_mount_list);
65 22534 : spin_unlock(&xfs_mount_list_lock);
66 22534 : }
67 :
68 22537 : static inline void xfs_mount_list_del(struct xfs_mount *mp)
69 : {
70 22537 : spin_lock(&xfs_mount_list_lock);
71 22537 : list_del(&mp->m_mount_list);
72 22537 : spin_unlock(&xfs_mount_list_lock);
73 22537 : }
74 : #else /* !CONFIG_HOTPLUG_CPU */
75 : static inline void xfs_mount_list_add(struct xfs_mount *mp) {}
76 : static inline void xfs_mount_list_del(struct xfs_mount *mp) {}
77 : #endif
78 :
79 : enum xfs_dax_mode {
80 : XFS_DAX_INODE = 0,
81 : XFS_DAX_ALWAYS = 1,
82 : XFS_DAX_NEVER = 2,
83 : };
84 :
85 : static void
86 : xfs_mount_set_dax_mode(
87 : struct xfs_mount *mp,
88 : enum xfs_dax_mode mode)
89 : {
90 0 : switch (mode) {
91 : case XFS_DAX_INODE:
92 : mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
93 : break;
94 : case XFS_DAX_ALWAYS:
95 : mp->m_features |= XFS_FEAT_DAX_ALWAYS;
96 : mp->m_features &= ~XFS_FEAT_DAX_NEVER;
97 : break;
98 : case XFS_DAX_NEVER:
99 0 : mp->m_features |= XFS_FEAT_DAX_NEVER;
100 0 : mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
101 0 : break;
102 : }
103 : }
104 :
105 : static const struct constant_table dax_param_enums[] = {
106 : {"inode", XFS_DAX_INODE },
107 : {"always", XFS_DAX_ALWAYS },
108 : {"never", XFS_DAX_NEVER },
109 : {}
110 : };
111 :
112 : /*
113 : * Table driven mount option parser.
114 : */
115 : enum {
116 : Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
117 : Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
118 : Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
119 : Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
120 : Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
121 : Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
122 : Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
123 : Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
124 : Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,
125 : };
126 :
127 : static const struct fs_parameter_spec xfs_fs_parameters[] = {
128 : fsparam_u32("logbufs", Opt_logbufs),
129 : fsparam_string("logbsize", Opt_logbsize),
130 : fsparam_string("logdev", Opt_logdev),
131 : fsparam_string("rtdev", Opt_rtdev),
132 : fsparam_flag("wsync", Opt_wsync),
133 : fsparam_flag("noalign", Opt_noalign),
134 : fsparam_flag("swalloc", Opt_swalloc),
135 : fsparam_u32("sunit", Opt_sunit),
136 : fsparam_u32("swidth", Opt_swidth),
137 : fsparam_flag("nouuid", Opt_nouuid),
138 : fsparam_flag("grpid", Opt_grpid),
139 : fsparam_flag("nogrpid", Opt_nogrpid),
140 : fsparam_flag("bsdgroups", Opt_bsdgroups),
141 : fsparam_flag("sysvgroups", Opt_sysvgroups),
142 : fsparam_string("allocsize", Opt_allocsize),
143 : fsparam_flag("norecovery", Opt_norecovery),
144 : fsparam_flag("inode64", Opt_inode64),
145 : fsparam_flag("inode32", Opt_inode32),
146 : fsparam_flag("ikeep", Opt_ikeep),
147 : fsparam_flag("noikeep", Opt_noikeep),
148 : fsparam_flag("largeio", Opt_largeio),
149 : fsparam_flag("nolargeio", Opt_nolargeio),
150 : fsparam_flag("attr2", Opt_attr2),
151 : fsparam_flag("noattr2", Opt_noattr2),
152 : fsparam_flag("filestreams", Opt_filestreams),
153 : fsparam_flag("quota", Opt_quota),
154 : fsparam_flag("noquota", Opt_noquota),
155 : fsparam_flag("usrquota", Opt_usrquota),
156 : fsparam_flag("grpquota", Opt_grpquota),
157 : fsparam_flag("prjquota", Opt_prjquota),
158 : fsparam_flag("uquota", Opt_uquota),
159 : fsparam_flag("gquota", Opt_gquota),
160 : fsparam_flag("pquota", Opt_pquota),
161 : fsparam_flag("uqnoenforce", Opt_uqnoenforce),
162 : fsparam_flag("gqnoenforce", Opt_gqnoenforce),
163 : fsparam_flag("pqnoenforce", Opt_pqnoenforce),
164 : fsparam_flag("qnoenforce", Opt_qnoenforce),
165 : fsparam_flag("discard", Opt_discard),
166 : fsparam_flag("nodiscard", Opt_nodiscard),
167 : fsparam_flag("dax", Opt_dax),
168 : fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
169 : {}
170 : };
171 :
172 : struct proc_xfs_info {
173 : uint64_t flag;
174 : char *str;
175 : };
176 :
177 : static int
178 4362185 : xfs_fs_show_options(
179 : struct seq_file *m,
180 : struct dentry *root)
181 : {
182 4362185 : static struct proc_xfs_info xfs_info_set[] = {
183 : /* the few simple ones we can get from the mount struct */
184 : { XFS_FEAT_IKEEP, ",ikeep" },
185 : { XFS_FEAT_WSYNC, ",wsync" },
186 : { XFS_FEAT_NOALIGN, ",noalign" },
187 : { XFS_FEAT_SWALLOC, ",swalloc" },
188 : { XFS_FEAT_NOUUID, ",nouuid" },
189 : { XFS_FEAT_NORECOVERY, ",norecovery" },
190 : { XFS_FEAT_ATTR2, ",attr2" },
191 : { XFS_FEAT_FILESTREAMS, ",filestreams" },
192 : { XFS_FEAT_GRPID, ",grpid" },
193 : { XFS_FEAT_DISCARD, ",discard" },
194 : { XFS_FEAT_LARGE_IOSIZE, ",largeio" },
195 : { XFS_FEAT_DAX_ALWAYS, ",dax=always" },
196 : { XFS_FEAT_DAX_NEVER, ",dax=never" },
197 : { 0, NULL }
198 : };
199 4362185 : struct xfs_mount *mp = XFS_M(root->d_sb);
200 4362185 : struct proc_xfs_info *xfs_infop;
201 :
202 61024077 : for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
203 56661916 : if (mp->m_features & xfs_infop->flag)
204 4370695 : seq_puts(m, xfs_infop->str);
205 : }
206 :
207 8723367 : seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64);
208 :
209 4360650 : if (xfs_has_allocsize(mp))
210 80 : seq_printf(m, ",allocsize=%dk",
211 40 : (1 << mp->m_allocsize_log) >> 10);
212 :
213 4362420 : if (mp->m_logbufs > 0)
214 4360476 : seq_printf(m, ",logbufs=%d", mp->m_logbufs);
215 4362173 : if (mp->m_logbsize > 0)
216 4360208 : seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
217 :
218 4361128 : if (mp->m_logname)
219 4 : seq_show_option(m, "logdev", mp->m_logname);
220 4359613 : if (mp->m_rtname)
221 779834 : seq_show_option(m, "rtdev", mp->m_rtname);
222 :
223 4359556 : if (mp->m_dalign > 0)
224 2244 : seq_printf(m, ",sunit=%d",
225 1122 : (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
226 4361433 : if (mp->m_swidth > 0)
227 2242 : seq_printf(m, ",swidth=%d",
228 1121 : (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
229 :
230 4361126 : if (mp->m_qflags & XFS_UQUOTA_ENFD)
231 3556139 : seq_puts(m, ",usrquota");
232 804987 : else if (mp->m_qflags & XFS_UQUOTA_ACCT)
233 382 : seq_puts(m, ",uqnoenforce");
234 :
235 4360879 : if (mp->m_qflags & XFS_PQUOTA_ENFD)
236 3553211 : seq_puts(m, ",prjquota");
237 807668 : else if (mp->m_qflags & XFS_PQUOTA_ACCT)
238 356 : seq_puts(m, ",pqnoenforce");
239 :
240 4361485 : if (mp->m_qflags & XFS_GQUOTA_ENFD)
241 3554015 : seq_puts(m, ",grpquota");
242 807471 : else if (mp->m_qflags & XFS_GQUOTA_ACCT)
243 394 : seq_puts(m, ",gqnoenforce");
244 :
245 4362934 : if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
246 802508 : seq_puts(m, ",noquota");
247 :
248 4362940 : return 0;
249 : }
250 :
251 : static bool
252 168654 : xfs_set_inode_alloc_perag(
253 : struct xfs_perag *pag,
254 : xfs_ino_t ino,
255 : xfs_agnumber_t max_metadata)
256 : {
257 337308 : if (!xfs_is_inode32(pag->pag_mount)) {
258 168654 : set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
259 168654 : clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
260 168654 : return false;
261 : }
262 :
263 0 : if (ino > XFS_MAXINUMBER_32) {
264 0 : clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
265 0 : clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
266 0 : return false;
267 : }
268 :
269 0 : set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
270 0 : if (pag->pag_agno < max_metadata)
271 0 : set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
272 : else
273 0 : clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
274 : return true;
275 : }
276 :
277 : /*
278 : * Set parameters for inode allocation heuristics, taking into account
279 : * filesystem size and inode32/inode64 mount options; i.e. specifically
280 : * whether or not XFS_FEAT_SMALL_INUMS is set.
281 : *
282 : * Inode allocation patterns are altered only if inode32 is requested
283 : * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
284 : * If altered, XFS_OPSTATE_INODE32 is set as well.
285 : *
286 : * An agcount independent of that in the mount structure is provided
287 : * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
288 : * to the potentially higher ag count.
289 : *
290 : * Returns the maximum AG index which may contain inodes.
291 : */
292 : xfs_agnumber_t
293 32871 : xfs_set_inode_alloc(
294 : struct xfs_mount *mp,
295 : xfs_agnumber_t agcount)
296 : {
297 32871 : xfs_agnumber_t index;
298 32871 : xfs_agnumber_t maxagi = 0;
299 32871 : xfs_sb_t *sbp = &mp->m_sb;
300 32871 : xfs_agnumber_t max_metadata;
301 32871 : xfs_agino_t agino;
302 32871 : xfs_ino_t ino;
303 :
304 : /*
305 : * Calculate how much should be reserved for inodes to meet
306 : * the max inode percentage. Used only for inode32.
307 : */
308 32871 : if (M_IGEO(mp)->maxicount) {
309 32871 : uint64_t icount;
310 :
311 32871 : icount = sbp->sb_dblocks * sbp->sb_imax_pct;
312 32871 : do_div(icount, 100);
313 32871 : icount += sbp->sb_agblocks - 1;
314 32871 : do_div(icount, sbp->sb_agblocks);
315 32871 : max_metadata = icount;
316 : } else {
317 : max_metadata = agcount;
318 : }
319 :
320 : /* Get the last possible inode in the filesystem */
321 32871 : agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
322 32871 : ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
323 :
324 : /*
325 : * If user asked for no more than 32-bit inodes, and the fs is
326 : * sufficiently large, set XFS_OPSTATE_INODE32 if we must alter
327 : * the allocator to accommodate the request.
328 : */
329 32871 : if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
330 0 : set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
331 : else
332 32871 : clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
333 :
334 201525 : for (index = 0; index < agcount; index++) {
335 168654 : struct xfs_perag *pag;
336 :
337 168654 : ino = XFS_AGINO_TO_INO(mp, index, agino);
338 :
339 168654 : pag = xfs_perag_get(mp, index);
340 168654 : if (xfs_set_inode_alloc_perag(pag, ino, max_metadata))
341 0 : maxagi++;
342 168654 : xfs_perag_put(pag);
343 : }
344 :
345 65742 : return xfs_is_inode32(mp) ? maxagi : agcount;
346 : }
347 :
348 : static int
349 0 : xfs_setup_dax_always(
350 : struct xfs_mount *mp)
351 : {
352 0 : if (!mp->m_ddev_targp->bt_daxdev &&
353 0 : (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) {
354 0 : xfs_alert(mp,
355 : "DAX unsupported by block device. Turning off DAX.");
356 0 : goto disable_dax;
357 : }
358 :
359 0 : if (mp->m_super->s_blocksize != PAGE_SIZE) {
360 0 : xfs_alert(mp,
361 : "DAX not supported for blocksize. Turning off DAX.");
362 0 : goto disable_dax;
363 : }
364 :
365 0 : if (xfs_has_reflink(mp) &&
366 0 : bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
367 0 : xfs_alert(mp,
368 : "DAX and reflink cannot work with multi-partitions!");
369 0 : return -EINVAL;
370 : }
371 :
372 0 : xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
373 0 : return 0;
374 :
375 0 : disable_dax:
376 0 : xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
377 0 : return 0;
378 : }
379 :
380 : static void
381 0 : xfs_bdev_mark_dead(
382 : struct block_device *bdev)
383 : {
384 0 : xfs_force_shutdown(bdev->bd_holder, SHUTDOWN_DEVICE_REMOVED);
385 0 : }
386 :
387 : static const struct blk_holder_ops xfs_holder_ops = {
388 : .mark_dead = xfs_bdev_mark_dead,
389 : };
390 :
391 : STATIC int
392 170 : xfs_blkdev_get(
393 : xfs_mount_t *mp,
394 : const char *name,
395 : struct block_device **bdevp)
396 : {
397 170 : int error = 0;
398 :
399 170 : *bdevp = blkdev_get_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE, mp,
400 : &xfs_holder_ops);
401 170 : if (IS_ERR(*bdevp)) {
402 0 : error = PTR_ERR(*bdevp);
403 0 : xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
404 : }
405 :
406 170 : return error;
407 : }
408 :
409 : STATIC void
410 170 : xfs_blkdev_put(
411 : struct xfs_mount *mp,
412 : struct block_device *bdev)
413 : {
414 170 : if (bdev)
415 170 : blkdev_put(bdev, mp);
416 170 : }
417 :
418 : STATIC void
419 22537 : xfs_close_devices(
420 : struct xfs_mount *mp)
421 : {
422 22537 : if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
423 4 : struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
424 :
425 4 : xfs_free_buftarg(mp->m_logdev_targp);
426 4 : xfs_blkdev_put(mp, logdev);
427 : }
428 22537 : if (mp->m_rtdev_targp) {
429 166 : struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
430 :
431 166 : xfs_free_buftarg(mp->m_rtdev_targp);
432 166 : xfs_blkdev_put(mp, rtdev);
433 : }
434 22537 : xfs_free_buftarg(mp->m_ddev_targp);
435 22537 : }
436 :
437 : /*
438 : * The file system configurations are:
439 : * (1) device (partition) with data and internal log
440 : * (2) logical volume with data and log subvolumes.
441 : * (3) logical volume with data, log, and realtime subvolumes.
442 : *
443 : * We only have to handle opening the log and realtime volumes here if
444 : * they are present. The data subvolume has already been opened by
445 : * get_sb_bdev() and is stored in sb->s_bdev.
446 : */
447 : STATIC int
448 22534 : xfs_open_devices(
449 : struct xfs_mount *mp)
450 : {
451 22534 : struct block_device *ddev = mp->m_super->s_bdev;
452 22534 : struct block_device *logdev = NULL, *rtdev = NULL;
453 22534 : int error;
454 :
455 : /*
456 : * Open real time and log devices - order is important.
457 : */
458 22534 : if (mp->m_logname) {
459 4 : error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
460 4 : if (error)
461 : return error;
462 : }
463 :
464 22534 : if (mp->m_rtname) {
465 166 : error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
466 166 : if (error)
467 0 : goto out_close_logdev;
468 :
469 166 : if (rtdev == ddev || rtdev == logdev) {
470 0 : xfs_warn(mp,
471 : "Cannot mount filesystem with identical rtdev and ddev/logdev.");
472 0 : error = -EINVAL;
473 0 : goto out_close_rtdev;
474 : }
475 : }
476 :
477 : /*
478 : * Setup xfs_mount buffer target pointers
479 : */
480 22534 : error = -ENOMEM;
481 22534 : mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
482 22534 : if (!mp->m_ddev_targp)
483 0 : goto out_close_rtdev;
484 :
485 22534 : if (rtdev) {
486 166 : mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
487 166 : if (!mp->m_rtdev_targp)
488 0 : goto out_free_ddev_targ;
489 : }
490 :
491 22534 : if (logdev && logdev != ddev) {
492 4 : mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
493 4 : if (!mp->m_logdev_targp)
494 0 : goto out_free_rtdev_targ;
495 : } else {
496 22530 : mp->m_logdev_targp = mp->m_ddev_targp;
497 : }
498 :
499 : return 0;
500 :
501 : out_free_rtdev_targ:
502 0 : if (mp->m_rtdev_targp)
503 0 : xfs_free_buftarg(mp->m_rtdev_targp);
504 0 : out_free_ddev_targ:
505 0 : xfs_free_buftarg(mp->m_ddev_targp);
506 0 : out_close_rtdev:
507 0 : xfs_blkdev_put(mp, rtdev);
508 0 : out_close_logdev:
509 0 : if (logdev && logdev != ddev)
510 0 : xfs_blkdev_put(mp, logdev);
511 : return error;
512 : }
513 :
514 : /*
515 : * Setup xfs_mount buffer target pointers based on superblock
516 : */
517 : STATIC int
518 22505 : xfs_setup_devices(
519 : struct xfs_mount *mp)
520 : {
521 22505 : int error;
522 :
523 22505 : error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
524 22505 : if (error)
525 : return error;
526 :
527 22505 : if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
528 2 : unsigned int log_sector_size = BBSIZE;
529 :
530 2 : if (xfs_has_sector(mp))
531 0 : log_sector_size = mp->m_sb.sb_logsectsize;
532 2 : error = xfs_setsize_buftarg(mp->m_logdev_targp,
533 : log_sector_size);
534 2 : if (error)
535 : return error;
536 : }
537 22505 : if (mp->m_rtdev_targp) {
538 165 : error = xfs_setsize_buftarg(mp->m_rtdev_targp,
539 165 : mp->m_sb.sb_sectsize);
540 165 : if (error)
541 0 : return error;
542 : }
543 :
544 : return 0;
545 : }
546 :
547 : STATIC int
548 22534 : xfs_init_mount_workqueues(
549 : struct xfs_mount *mp)
550 : {
551 45068 : mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
552 : XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
553 22534 : 1, mp->m_super->s_id);
554 22534 : if (!mp->m_buf_workqueue)
555 0 : goto out;
556 :
557 45068 : mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
558 : XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
559 22534 : 0, mp->m_super->s_id);
560 22534 : if (!mp->m_unwritten_workqueue)
561 0 : goto out_destroy_buf;
562 :
563 45068 : mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
564 : XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
565 22534 : 0, mp->m_super->s_id);
566 22534 : if (!mp->m_reclaim_workqueue)
567 0 : goto out_destroy_unwritten;
568 :
569 45068 : mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s",
570 : XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM),
571 22534 : 0, mp->m_super->s_id);
572 22534 : if (!mp->m_blockgc_wq)
573 0 : goto out_destroy_reclaim;
574 :
575 45068 : mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s",
576 : XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
577 22534 : 1, mp->m_super->s_id);
578 22534 : if (!mp->m_inodegc_wq)
579 0 : goto out_destroy_blockgc;
580 :
581 45068 : mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s",
582 22534 : XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id);
583 22534 : if (!mp->m_sync_workqueue)
584 0 : goto out_destroy_inodegc;
585 :
586 : return 0;
587 :
588 : out_destroy_inodegc:
589 0 : destroy_workqueue(mp->m_inodegc_wq);
590 0 : out_destroy_blockgc:
591 0 : destroy_workqueue(mp->m_blockgc_wq);
592 0 : out_destroy_reclaim:
593 0 : destroy_workqueue(mp->m_reclaim_workqueue);
594 0 : out_destroy_unwritten:
595 0 : destroy_workqueue(mp->m_unwritten_workqueue);
596 0 : out_destroy_buf:
597 0 : destroy_workqueue(mp->m_buf_workqueue);
598 : out:
599 : return -ENOMEM;
600 : }
601 :
602 : STATIC void
603 22537 : xfs_destroy_mount_workqueues(
604 : struct xfs_mount *mp)
605 : {
606 22537 : destroy_workqueue(mp->m_sync_workqueue);
607 22537 : destroy_workqueue(mp->m_blockgc_wq);
608 22537 : destroy_workqueue(mp->m_inodegc_wq);
609 22537 : destroy_workqueue(mp->m_reclaim_workqueue);
610 22537 : destroy_workqueue(mp->m_unwritten_workqueue);
611 22537 : destroy_workqueue(mp->m_buf_workqueue);
612 22537 : }
613 :
614 : static void
615 349936 : xfs_flush_inodes_worker(
616 : struct work_struct *work)
617 : {
618 349936 : struct xfs_mount *mp = container_of(work, struct xfs_mount,
619 : m_flush_inodes_work);
620 349936 : struct super_block *sb = mp->m_super;
621 :
622 349936 : if (down_read_trylock(&sb->s_umount)) {
623 349936 : sync_inodes_sb(sb);
624 349936 : up_read(&sb->s_umount);
625 : }
626 349936 : }
627 :
628 : /*
629 : * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
630 : * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
631 : * for IO to complete so that we effectively throttle multiple callers to the
632 : * rate at which IO is completing.
633 : */
634 : void
635 694932 : xfs_flush_inodes(
636 : struct xfs_mount *mp)
637 : {
638 : /*
639 : * If flush_work() returns true then that means we waited for a flush
640 : * which was already in progress. Don't bother running another scan.
641 : */
642 694932 : if (flush_work(&mp->m_flush_inodes_work))
643 : return;
644 :
645 350120 : queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
646 350122 : flush_work(&mp->m_flush_inodes_work);
647 : }
648 :
649 : /* Catch misguided souls that try to use this interface on XFS */
650 : STATIC struct inode *
651 0 : xfs_fs_alloc_inode(
652 : struct super_block *sb)
653 : {
654 0 : BUG();
655 : return NULL;
656 : }
657 :
658 : /*
659 : * Now that the generic code is guaranteed not to be accessing
660 : * the linux inode, we can inactivate and reclaim the inode.
661 : */
662 : STATIC void
663 988776844 : xfs_fs_destroy_inode(
664 : struct inode *inode)
665 : {
666 988776844 : struct xfs_inode *ip = XFS_I(inode);
667 :
668 988776844 : trace_xfs_destroy_inode(ip);
669 :
670 988836076 : ASSERT(!rwsem_is_locked(&inode->i_rwsem));
671 988836076 : XFS_STATS_INC(ip->i_mount, vn_rele);
672 988825874 : XFS_STATS_INC(ip->i_mount, vn_remove);
673 988851153 : xfs_inode_mark_reclaimable(ip);
674 988811190 : }
675 :
676 : static void
677 976343 : xfs_fs_dirty_inode(
678 : struct inode *inode,
679 : int flags)
680 : {
681 976343 : struct xfs_inode *ip = XFS_I(inode);
682 976343 : struct xfs_mount *mp = ip->i_mount;
683 976343 : struct xfs_trans *tp;
684 :
685 976343 : if (!(inode->i_sb->s_flags & SB_LAZYTIME))
686 976323 : return;
687 :
688 : /*
689 : * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC)
690 : * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed
691 : * in flags possibly together with I_DIRTY_SYNC.
692 : */
693 20 : if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME))
694 : return;
695 :
696 20 : if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
697 : return;
698 20 : xfs_ilock(ip, XFS_ILOCK_EXCL);
699 20 : xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
700 20 : xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
701 20 : xfs_trans_commit(tp);
702 : }
703 :
704 : /*
705 : * Slab object creation initialisation for the XFS inode.
706 : * This covers only the idempotent fields in the XFS inode;
707 : * all other fields need to be initialised on allocation
708 : * from the slab. This avoids the need to repeatedly initialise
709 : * fields in the xfs inode that left in the initialise state
710 : * when freeing the inode.
711 : */
712 : STATIC void
713 281798784 : xfs_fs_inode_init_once(
714 : void *inode)
715 : {
716 281798784 : struct xfs_inode *ip = inode;
717 :
718 281798784 : memset(ip, 0, sizeof(struct xfs_inode));
719 :
720 : /* vfs inode */
721 281798784 : inode_init_once(VFS_I(ip));
722 :
723 : /* xfs inode */
724 281798440 : atomic_set(&ip->i_pincount, 0);
725 281798440 : spin_lock_init(&ip->i_flags_lock);
726 :
727 281798405 : mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
728 : "xfsino", ip->i_ino);
729 281799068 : }
730 :
731 : /*
732 : * We do an unlocked check for XFS_IDONTCACHE here because we are already
733 : * serialised against cache hits here via the inode->i_lock and igrab() in
734 : * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
735 : * racing with us, and it avoids needing to grab a spinlock here for every inode
736 : * we drop the final reference on.
737 : */
738 : STATIC int
739 32894838573 : xfs_fs_drop_inode(
740 : struct inode *inode)
741 : {
742 32894838573 : struct xfs_inode *ip = XFS_I(inode);
743 :
744 : /*
745 : * If this unlinked inode is in the middle of recovery, don't
746 : * drop the inode just yet; log recovery will take care of
747 : * that. See the comment for this inode flag.
748 : */
749 32894838573 : if (ip->i_flags & XFS_IRECOVERY) {
750 12 : ASSERT(xlog_recovery_needed(ip->i_mount->m_log));
751 6 : return 0;
752 : }
753 :
754 32894838567 : return generic_drop_inode(inode);
755 : }
756 :
757 : static void
758 25081 : xfs_mount_free(
759 : struct xfs_mount *mp)
760 : {
761 25081 : kfree(mp->m_rtname);
762 25081 : kfree(mp->m_logname);
763 25081 : kmem_free(mp);
764 25081 : }
765 :
766 : STATIC int
767 3957918 : xfs_fs_sync_fs(
768 : struct super_block *sb,
769 : int wait)
770 : {
771 3957918 : struct xfs_mount *mp = XFS_M(sb);
772 3957918 : int error;
773 :
774 3957918 : trace_xfs_fs_sync_fs(mp, __return_address);
775 :
776 : /*
777 : * Doing anything during the async pass would be counterproductive.
778 : */
779 3957986 : if (!wait)
780 : return 0;
781 :
782 1979005 : error = xfs_log_force(mp, XFS_LOG_SYNC);
783 1978816 : if (error)
784 : return error;
785 :
786 1961072 : if (laptop_mode) {
787 : /*
788 : * The disk must be active because we're syncing.
789 : * We schedule log work now (now that the disk is
790 : * active) instead of later (when it might not be).
791 : */
792 0 : flush_delayed_work(&mp->m_log->l_work);
793 : }
794 :
795 : /*
796 : * If we are called with page faults frozen out, it means we are about
797 : * to freeze the transaction subsystem. Take the opportunity to shut
798 : * down inodegc because once SB_FREEZE_FS is set it's too late to
799 : * prevent inactivation races with freeze. The fs doesn't get called
800 : * again by the freezing process until after SB_FREEZE_FS has been set,
801 : * so it's now or never. Same logic applies to speculative allocation
802 : * garbage collection.
803 : *
804 : * We don't care if this is a normal syncfs call that does this or
805 : * freeze that does this - we can run this multiple times without issue
806 : * and we won't race with a restart because a restart can only occur
807 : * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE.
808 : */
809 1961072 : if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) {
810 46045 : xfs_inodegc_stop(mp);
811 46045 : xfs_blockgc_stop(mp);
812 : }
813 :
814 : return 0;
815 : }
816 :
817 : STATIC int
818 7859266 : xfs_fs_statfs(
819 : struct dentry *dentry,
820 : struct kstatfs *statp)
821 : {
822 7859266 : struct xfs_mount *mp = XFS_M(dentry->d_sb);
823 7859266 : xfs_sb_t *sbp = &mp->m_sb;
824 7859266 : struct xfs_inode *ip = XFS_I(d_inode(dentry));
825 7859266 : uint64_t fakeinos, id;
826 7859266 : uint64_t icount;
827 7859266 : uint64_t ifree;
828 7859266 : uint64_t fdblocks;
829 7859266 : xfs_extlen_t lsize;
830 7859266 : int64_t ffree;
831 :
832 : /*
833 : * Expedite background inodegc but don't wait. We do not want to block
834 : * here waiting hours for a billion extent file to be truncated.
835 : */
836 7859266 : xfs_inodegc_push(mp);
837 :
838 7856406 : statp->f_type = XFS_SUPER_MAGIC;
839 7856406 : statp->f_namelen = MAXNAMELEN - 1;
840 :
841 7856406 : id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
842 7856406 : statp->f_fsid = u64_to_fsid(id);
843 :
844 7856406 : icount = percpu_counter_sum(&mp->m_icount);
845 7859986 : ifree = percpu_counter_sum(&mp->m_ifree);
846 7860163 : fdblocks = percpu_counter_sum(&mp->m_fdblocks);
847 :
848 7860049 : spin_lock(&mp->m_sb_lock);
849 7860259 : statp->f_bsize = sbp->sb_blocksize;
850 7860259 : lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
851 7860259 : statp->f_blocks = sbp->sb_dblocks - lsize;
852 7860259 : spin_unlock(&mp->m_sb_lock);
853 :
854 : /* make sure statp->f_bfree does not underflow */
855 7860058 : statp->f_bfree = max_t(int64_t, 0,
856 : fdblocks - xfs_fdblocks_unavailable(mp));
857 7860058 : statp->f_bavail = statp->f_bfree;
858 :
859 7860058 : fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
860 7860058 : statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
861 7860058 : if (M_IGEO(mp)->maxicount)
862 7860063 : statp->f_files = min_t(typeof(statp->f_files),
863 : statp->f_files,
864 : M_IGEO(mp)->maxicount);
865 :
866 : /* If sb_icount overshot maxicount, report actual allocation */
867 7860058 : statp->f_files = max_t(typeof(statp->f_files),
868 : statp->f_files,
869 : sbp->sb_icount);
870 :
871 : /* make sure statp->f_ffree does not underflow */
872 7860058 : ffree = statp->f_files - (icount - ifree);
873 7860058 : statp->f_ffree = max_t(int64_t, ffree, 0);
874 :
875 :
876 7860058 : if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
877 836 : ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
878 : (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
879 608 : xfs_qm_statvfs(ip, statp);
880 :
881 7860058 : if (XFS_IS_REALTIME_MOUNT(mp) &&
882 1379498 : (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
883 1379252 : s64 freertx;
884 :
885 1379252 : statp->f_blocks = sbp->sb_rblocks;
886 1379252 : freertx = percpu_counter_sum_positive(&mp->m_frextents);
887 1379252 : statp->f_bavail = statp->f_bfree = freertx * sbp->sb_rextsize;
888 : }
889 :
890 7860058 : return 0;
891 : }
892 :
893 : STATIC void
894 46484 : xfs_save_resvblks(struct xfs_mount *mp)
895 : {
896 46484 : uint64_t resblks = 0;
897 :
898 46484 : mp->m_resblks_save = mp->m_resblks;
899 46484 : xfs_reserve_blocks(mp, &resblks, NULL);
900 46484 : }
901 :
902 : STATIC void
903 46474 : xfs_restore_resvblks(struct xfs_mount *mp)
904 : {
905 46474 : uint64_t resblks;
906 :
907 46474 : if (mp->m_resblks_save) {
908 46470 : resblks = mp->m_resblks_save;
909 46470 : mp->m_resblks_save = 0;
910 : } else
911 4 : resblks = xfs_default_resblks(mp);
912 :
913 46474 : xfs_reserve_blocks(mp, &resblks, NULL);
914 46474 : }
915 :
916 : /*
917 : * Second stage of a freeze. The data is already frozen so we only
918 : * need to take care of the metadata. Once that's done sync the superblock
919 : * to the log to dirty it in case of a crash while frozen. This ensures that we
920 : * will recover the unlinked inode lists on the next mount.
921 : */
922 : STATIC int
923 46045 : xfs_fs_freeze(
924 : struct super_block *sb)
925 : {
926 46045 : struct xfs_mount *mp = XFS_M(sb);
927 46045 : unsigned int flags;
928 46045 : int ret;
929 :
930 : /*
931 : * The filesystem is now frozen far enough that memory reclaim
932 : * cannot safely operate on the filesystem. Hence we need to
933 : * set a GFP_NOFS context here to avoid recursion deadlocks.
934 : */
935 46045 : flags = memalloc_nofs_save();
936 46045 : xfs_save_resvblks(mp);
937 46045 : ret = xfs_log_quiesce(mp);
938 46045 : memalloc_nofs_restore(flags);
939 :
940 : /*
941 : * For read-write filesystems, we need to restart the inodegc on error
942 : * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not
943 : * going to be run to restart it now. We are at SB_FREEZE_FS level
944 : * here, so we can restart safely without racing with a stop in
945 : * xfs_fs_sync_fs().
946 : */
947 46045 : if (ret && !xfs_is_readonly(mp)) {
948 0 : xfs_blockgc_start(mp);
949 0 : xfs_inodegc_start(mp);
950 : }
951 :
952 46045 : return ret;
953 : }
954 :
955 : STATIC int
956 46045 : xfs_fs_unfreeze(
957 : struct super_block *sb)
958 : {
959 46045 : struct xfs_mount *mp = XFS_M(sb);
960 :
961 46045 : xfs_restore_resvblks(mp);
962 46045 : xfs_log_work_queue(mp);
963 :
964 : /*
965 : * Don't reactivate the inodegc worker on a readonly filesystem because
966 : * inodes are sent directly to reclaim. Don't reactivate the blockgc
967 : * worker because there are no speculative preallocations on a readonly
968 : * filesystem.
969 : */
970 92090 : if (!xfs_is_readonly(mp)) {
971 46045 : xfs_blockgc_start(mp);
972 46045 : xfs_inodegc_start(mp);
973 : }
974 :
975 46045 : return 0;
976 : }
977 :
978 : /*
979 : * This function fills in xfs_mount_t fields based on mount args.
980 : * Note: the superblock _has_ now been read in.
981 : */
982 : STATIC int
983 22517 : xfs_finish_flags(
984 : struct xfs_mount *mp)
985 : {
986 : /* Fail a mount where the logbuf is smaller than the log stripe */
987 22517 : if (xfs_has_logv2(mp)) {
988 22507 : if (mp->m_logbsize <= 0 &&
989 22359 : mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
990 58 : mp->m_logbsize = mp->m_sb.sb_logsunit;
991 22449 : } else if (mp->m_logbsize > 0 &&
992 148 : mp->m_logbsize < mp->m_sb.sb_logsunit) {
993 0 : xfs_warn(mp,
994 : "logbuf size must be greater than or equal to log stripe size");
995 0 : return -EINVAL;
996 : }
997 : } else {
998 : /* Fail a mount if the logbuf is larger than 32K */
999 10 : if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1000 4 : xfs_warn(mp,
1001 : "logbuf size for version 1 logs must be 16K or 32K");
1002 4 : return -EINVAL;
1003 : }
1004 : }
1005 :
1006 : /*
1007 : * V5 filesystems always use attr2 format for attributes.
1008 : */
1009 22513 : if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) {
1010 4 : xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
1011 : "attr2 is always enabled for V5 filesystems.");
1012 4 : return -EINVAL;
1013 : }
1014 :
1015 : /*
1016 : * prohibit r/w mounts of read-only filesystems
1017 : */
1018 22509 : if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) {
1019 0 : xfs_warn(mp,
1020 : "cannot mount a read-only filesystem as read-write");
1021 0 : return -EROFS;
1022 : }
1023 :
1024 22509 : if ((mp->m_qflags & XFS_GQUOTA_ACCT) &&
1025 19987 : (mp->m_qflags & XFS_PQUOTA_ACCT) &&
1026 : !xfs_has_pquotino(mp)) {
1027 4 : xfs_warn(mp,
1028 : "Super block does not support project and group quota together");
1029 4 : return -EINVAL;
1030 : }
1031 :
1032 : return 0;
1033 : }
1034 :
1035 : static int
1036 22534 : xfs_init_percpu_counters(
1037 : struct xfs_mount *mp)
1038 : {
1039 22534 : int error;
1040 :
1041 22534 : error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1042 22534 : if (error)
1043 : return -ENOMEM;
1044 :
1045 22534 : error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1046 22534 : if (error)
1047 0 : goto free_icount;
1048 :
1049 22534 : error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1050 22534 : if (error)
1051 0 : goto free_ifree;
1052 :
1053 22534 : error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
1054 22534 : if (error)
1055 0 : goto free_fdblocks;
1056 :
1057 22534 : error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
1058 22534 : if (error)
1059 0 : goto free_delalloc;
1060 :
1061 : return 0;
1062 :
1063 : free_delalloc:
1064 0 : percpu_counter_destroy(&mp->m_delalloc_blks);
1065 0 : free_fdblocks:
1066 0 : percpu_counter_destroy(&mp->m_fdblocks);
1067 0 : free_ifree:
1068 0 : percpu_counter_destroy(&mp->m_ifree);
1069 0 : free_icount:
1070 0 : percpu_counter_destroy(&mp->m_icount);
1071 0 : return -ENOMEM;
1072 : }
1073 :
1074 : void
1075 43119 : xfs_reinit_percpu_counters(
1076 : struct xfs_mount *mp)
1077 : {
1078 43119 : percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1079 43119 : percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1080 43119 : percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1081 43119 : percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents);
1082 43119 : }
1083 :
1084 : static void
1085 22537 : xfs_destroy_percpu_counters(
1086 : struct xfs_mount *mp)
1087 : {
1088 22537 : percpu_counter_destroy(&mp->m_icount);
1089 22537 : percpu_counter_destroy(&mp->m_ifree);
1090 22537 : percpu_counter_destroy(&mp->m_fdblocks);
1091 45074 : ASSERT(xfs_is_shutdown(mp) ||
1092 : percpu_counter_sum(&mp->m_delalloc_blks) == 0);
1093 22537 : percpu_counter_destroy(&mp->m_delalloc_blks);
1094 22537 : percpu_counter_destroy(&mp->m_frextents);
1095 22537 : }
1096 :
1097 : static int
1098 22534 : xfs_inodegc_init_percpu(
1099 : struct xfs_mount *mp)
1100 : {
1101 22534 : struct xfs_inodegc *gc;
1102 22534 : int cpu;
1103 :
1104 22534 : mp->m_inodegc = alloc_percpu(struct xfs_inodegc);
1105 22534 : if (!mp->m_inodegc)
1106 : return -ENOMEM;
1107 :
1108 67602 : for_each_possible_cpu(cpu) {
1109 45068 : gc = per_cpu_ptr(mp->m_inodegc, cpu);
1110 : #if defined(DEBUG) || defined(XFS_WARN)
1111 45068 : gc->cpu = cpu;
1112 : #endif
1113 45068 : init_llist_head(&gc->list);
1114 45068 : gc->items = 0;
1115 45068 : gc->error = 0;
1116 45068 : INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker);
1117 : }
1118 : return 0;
1119 : }
1120 :
1121 : static void
1122 : xfs_inodegc_free_percpu(
1123 : struct xfs_mount *mp)
1124 : {
1125 22537 : if (!mp->m_inodegc)
1126 : return;
1127 22537 : free_percpu(mp->m_inodegc);
1128 : }
1129 :
1130 : static void
1131 22452 : xfs_fs_put_super(
1132 : struct super_block *sb)
1133 : {
1134 22452 : struct xfs_mount *mp = XFS_M(sb);
1135 :
1136 : /* if ->fill_super failed, we have no mount to tear down */
1137 22452 : if (!sb->s_fs_info)
1138 : return;
1139 :
1140 22452 : xfs_notice(mp, "Unmounting Filesystem %pU", &mp->m_sb.sb_uuid);
1141 22452 : xfs_filestream_unmount(mp);
1142 22452 : xfs_unmountfs(mp);
1143 :
1144 22452 : xfs_freesb(mp);
1145 22452 : free_percpu(mp->m_stats.xs_stats);
1146 22452 : xfs_mount_list_del(mp);
1147 22452 : xfs_inodegc_free_percpu(mp);
1148 22452 : xfs_destroy_percpu_counters(mp);
1149 22452 : xfs_destroy_mount_workqueues(mp);
1150 22452 : xfs_close_devices(mp);
1151 :
1152 22452 : sb->s_fs_info = NULL;
1153 22452 : xfs_mount_free(mp);
1154 : }
1155 :
1156 : static long
1157 545651 : xfs_fs_nr_cached_objects(
1158 : struct super_block *sb,
1159 : struct shrink_control *sc)
1160 : {
1161 : /* Paranoia: catch incorrect calls during mount setup or teardown */
1162 545651 : if (WARN_ON_ONCE(!sb->s_fs_info))
1163 : return 0;
1164 545651 : return xfs_reclaim_inodes_count(XFS_M(sb));
1165 : }
1166 :
1167 : static long
1168 279699 : xfs_fs_free_cached_objects(
1169 : struct super_block *sb,
1170 : struct shrink_control *sc)
1171 : {
1172 279699 : return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1173 : }
1174 :
1175 : static void
1176 0 : xfs_fs_shutdown(
1177 : struct super_block *sb)
1178 : {
1179 0 : xfs_force_shutdown(XFS_M(sb), SHUTDOWN_DEVICE_REMOVED);
1180 0 : }
1181 :
1182 : static const struct super_operations xfs_super_operations = {
1183 : .alloc_inode = xfs_fs_alloc_inode,
1184 : .destroy_inode = xfs_fs_destroy_inode,
1185 : .dirty_inode = xfs_fs_dirty_inode,
1186 : .drop_inode = xfs_fs_drop_inode,
1187 : .put_super = xfs_fs_put_super,
1188 : .sync_fs = xfs_fs_sync_fs,
1189 : .freeze_fs = xfs_fs_freeze,
1190 : .unfreeze_fs = xfs_fs_unfreeze,
1191 : .statfs = xfs_fs_statfs,
1192 : .show_options = xfs_fs_show_options,
1193 : .nr_cached_objects = xfs_fs_nr_cached_objects,
1194 : .free_cached_objects = xfs_fs_free_cached_objects,
1195 : .shutdown = xfs_fs_shutdown,
1196 : };
1197 :
1198 : static int
1199 178 : suffix_kstrtoint(
1200 : const char *s,
1201 : unsigned int base,
1202 : int *res)
1203 : {
1204 178 : int last, shift_left_factor = 0, _res;
1205 178 : char *value;
1206 178 : int ret = 0;
1207 :
1208 178 : value = kstrdup(s, GFP_KERNEL);
1209 178 : if (!value)
1210 : return -ENOMEM;
1211 :
1212 178 : last = strlen(value) - 1;
1213 178 : if (value[last] == 'K' || value[last] == 'k') {
1214 170 : shift_left_factor = 10;
1215 170 : value[last] = '\0';
1216 : }
1217 178 : if (value[last] == 'M' || value[last] == 'm') {
1218 0 : shift_left_factor = 20;
1219 0 : value[last] = '\0';
1220 : }
1221 178 : if (value[last] == 'G' || value[last] == 'g') {
1222 2 : shift_left_factor = 30;
1223 2 : value[last] = '\0';
1224 : }
1225 :
1226 178 : if (kstrtoint(value, base, &_res))
1227 0 : ret = -EINVAL;
1228 178 : kfree(value);
1229 178 : *res = _res << shift_left_factor;
1230 178 : return ret;
1231 : }
1232 :
1233 : static inline void
1234 26 : xfs_fs_warn_deprecated(
1235 : struct fs_context *fc,
1236 : struct fs_parameter *param,
1237 : uint64_t flag,
1238 : bool value)
1239 : {
1240 : /* Don't print the warning if reconfiguring and current mount point
1241 : * already had the flag set
1242 : */
1243 26 : if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
1244 10 : !!(XFS_M(fc->root->d_sb)->m_features & flag) == value)
1245 : return;
1246 20 : xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
1247 : }
1248 :
1249 : /*
1250 : * Set mount state from a mount option.
1251 : *
1252 : * NOTE: mp->m_super is NULL here!
1253 : */
1254 : static int
1255 92672 : xfs_fs_parse_param(
1256 : struct fs_context *fc,
1257 : struct fs_parameter *param)
1258 : {
1259 92672 : struct xfs_mount *parsing_mp = fc->s_fs_info;
1260 92672 : struct fs_parse_result result;
1261 92672 : int size = 0;
1262 92672 : int opt;
1263 :
1264 92672 : opt = fs_parse(fc, xfs_fs_parameters, param, &result);
1265 92672 : if (opt < 0)
1266 : return opt;
1267 :
1268 69481 : switch (opt) {
1269 10 : case Opt_logbufs:
1270 10 : parsing_mp->m_logbufs = result.uint_32;
1271 10 : return 0;
1272 168 : case Opt_logbsize:
1273 168 : if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize))
1274 0 : return -EINVAL;
1275 : return 0;
1276 4 : case Opt_logdev:
1277 4 : kfree(parsing_mp->m_logname);
1278 4 : parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL);
1279 4 : if (!parsing_mp->m_logname)
1280 0 : return -ENOMEM;
1281 : return 0;
1282 650 : case Opt_rtdev:
1283 650 : kfree(parsing_mp->m_rtname);
1284 650 : parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
1285 650 : if (!parsing_mp->m_rtname)
1286 0 : return -ENOMEM;
1287 : return 0;
1288 10 : case Opt_allocsize:
1289 10 : if (suffix_kstrtoint(param->string, 10, &size))
1290 : return -EINVAL;
1291 10 : parsing_mp->m_allocsize_log = ffs(size) - 1;
1292 10 : parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE;
1293 10 : return 0;
1294 4 : case Opt_grpid:
1295 : case Opt_bsdgroups:
1296 4 : parsing_mp->m_features |= XFS_FEAT_GRPID;
1297 4 : return 0;
1298 4 : case Opt_nogrpid:
1299 : case Opt_sysvgroups:
1300 4 : parsing_mp->m_features &= ~XFS_FEAT_GRPID;
1301 4 : return 0;
1302 8 : case Opt_wsync:
1303 8 : parsing_mp->m_features |= XFS_FEAT_WSYNC;
1304 8 : return 0;
1305 14 : case Opt_norecovery:
1306 14 : parsing_mp->m_features |= XFS_FEAT_NORECOVERY;
1307 14 : return 0;
1308 2 : case Opt_noalign:
1309 2 : parsing_mp->m_features |= XFS_FEAT_NOALIGN;
1310 2 : return 0;
1311 2 : case Opt_swalloc:
1312 2 : parsing_mp->m_features |= XFS_FEAT_SWALLOC;
1313 2 : return 0;
1314 30 : case Opt_sunit:
1315 30 : parsing_mp->m_dalign = result.uint_32;
1316 30 : return 0;
1317 30 : case Opt_swidth:
1318 30 : parsing_mp->m_swidth = result.uint_32;
1319 30 : return 0;
1320 2 : case Opt_inode32:
1321 2 : parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS;
1322 2 : return 0;
1323 6 : case Opt_inode64:
1324 6 : parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
1325 6 : return 0;
1326 4 : case Opt_nouuid:
1327 4 : parsing_mp->m_features |= XFS_FEAT_NOUUID;
1328 4 : return 0;
1329 2 : case Opt_largeio:
1330 2 : parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE;
1331 2 : return 0;
1332 2 : case Opt_nolargeio:
1333 2 : parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE;
1334 2 : return 0;
1335 18 : case Opt_filestreams:
1336 18 : parsing_mp->m_features |= XFS_FEAT_FILESTREAMS;
1337 18 : return 0;
1338 450 : case Opt_noquota:
1339 450 : parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
1340 450 : parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
1341 450 : return 0;
1342 22365 : case Opt_quota:
1343 : case Opt_uquota:
1344 : case Opt_usrquota:
1345 22365 : parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD);
1346 22365 : return 0;
1347 462 : case Opt_qnoenforce:
1348 : case Opt_uqnoenforce:
1349 462 : parsing_mp->m_qflags |= XFS_UQUOTA_ACCT;
1350 462 : parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
1351 462 : return 0;
1352 22107 : case Opt_pquota:
1353 : case Opt_prjquota:
1354 22107 : parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD);
1355 22107 : return 0;
1356 430 : case Opt_pqnoenforce:
1357 430 : parsing_mp->m_qflags |= XFS_PQUOTA_ACCT;
1358 430 : parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
1359 430 : return 0;
1360 22163 : case Opt_gquota:
1361 : case Opt_grpquota:
1362 22163 : parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD);
1363 22163 : return 0;
1364 480 : case Opt_gqnoenforce:
1365 480 : parsing_mp->m_qflags |= XFS_GQUOTA_ACCT;
1366 480 : parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
1367 480 : return 0;
1368 4 : case Opt_discard:
1369 4 : parsing_mp->m_features |= XFS_FEAT_DISCARD;
1370 4 : return 0;
1371 2 : case Opt_nodiscard:
1372 2 : parsing_mp->m_features &= ~XFS_FEAT_DISCARD;
1373 2 : return 0;
1374 : #ifdef CONFIG_FS_DAX
1375 : case Opt_dax:
1376 : xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS);
1377 : return 0;
1378 : case Opt_dax_enum:
1379 : xfs_mount_set_dax_mode(parsing_mp, result.uint_32);
1380 : return 0;
1381 : #endif
1382 : /* Following mount options will be removed in September 2025 */
1383 4 : case Opt_ikeep:
1384 4 : xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true);
1385 4 : parsing_mp->m_features |= XFS_FEAT_IKEEP;
1386 4 : return 0;
1387 4 : case Opt_noikeep:
1388 4 : xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false);
1389 4 : parsing_mp->m_features &= ~XFS_FEAT_IKEEP;
1390 4 : return 0;
1391 10 : case Opt_attr2:
1392 10 : xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true);
1393 10 : parsing_mp->m_features |= XFS_FEAT_ATTR2;
1394 10 : return 0;
1395 8 : case Opt_noattr2:
1396 8 : xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true);
1397 8 : parsing_mp->m_features |= XFS_FEAT_NOATTR2;
1398 8 : return 0;
1399 22 : default:
1400 22 : xfs_warn(parsing_mp, "unknown mount option [%s].", param->key);
1401 22 : return -EINVAL;
1402 : }
1403 :
1404 : return 0;
1405 : }
1406 :
1407 : static int
1408 23447 : xfs_fs_validate_params(
1409 : struct xfs_mount *mp)
1410 : {
1411 : /* No recovery flag requires a read-only mount */
1412 23459 : if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) {
1413 2 : xfs_warn(mp, "no-recovery mounts must be read-only.");
1414 2 : return -EINVAL;
1415 : }
1416 :
1417 : /*
1418 : * We have not read the superblock at this point, so only the attr2
1419 : * mount option can set the attr2 feature by this stage.
1420 : */
1421 23445 : if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) {
1422 0 : xfs_warn(mp, "attr2 and noattr2 cannot both be specified.");
1423 0 : return -EINVAL;
1424 : }
1425 :
1426 :
1427 23445 : if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) {
1428 0 : xfs_warn(mp,
1429 : "sunit and swidth options incompatible with the noalign option");
1430 0 : return -EINVAL;
1431 : }
1432 :
1433 23445 : if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
1434 : xfs_warn(mp, "quota support not available in this kernel.");
1435 : return -EINVAL;
1436 : }
1437 :
1438 23445 : if ((mp->m_dalign && !mp->m_swidth) ||
1439 23423 : (!mp->m_dalign && mp->m_swidth)) {
1440 0 : xfs_warn(mp, "sunit and swidth must be specified together");
1441 0 : return -EINVAL;
1442 : }
1443 :
1444 23445 : if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
1445 0 : xfs_warn(mp,
1446 : "stripe width (%d) must be a multiple of the stripe unit (%d)",
1447 : mp->m_swidth, mp->m_dalign);
1448 0 : return -EINVAL;
1449 : }
1450 :
1451 23445 : if (mp->m_logbufs != -1 &&
1452 10 : mp->m_logbufs != 0 &&
1453 10 : (mp->m_logbufs < XLOG_MIN_ICLOGS ||
1454 : mp->m_logbufs > XLOG_MAX_ICLOGS)) {
1455 4 : xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
1456 : mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
1457 4 : return -EINVAL;
1458 : }
1459 :
1460 23441 : if (mp->m_logbsize != -1 &&
1461 164 : mp->m_logbsize != 0 &&
1462 164 : (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
1463 160 : mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
1464 160 : !is_power_of_2(mp->m_logbsize))) {
1465 4 : xfs_warn(mp,
1466 : "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
1467 : mp->m_logbsize);
1468 4 : return -EINVAL;
1469 : }
1470 :
1471 23437 : if (xfs_has_allocsize(mp) &&
1472 10 : (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
1473 : mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
1474 4 : xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
1475 : mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
1476 4 : return -EINVAL;
1477 : }
1478 :
1479 : return 0;
1480 : }
1481 :
1482 : static int
1483 22548 : xfs_fs_fill_super(
1484 : struct super_block *sb,
1485 : struct fs_context *fc)
1486 : {
1487 22548 : struct xfs_mount *mp = sb->s_fs_info;
1488 22548 : struct inode *root;
1489 22548 : int flags = 0, error;
1490 :
1491 22548 : mp->m_super = sb;
1492 :
1493 22548 : error = xfs_fs_validate_params(mp);
1494 22548 : if (error)
1495 14 : goto out_free_names;
1496 :
1497 22534 : sb_min_blocksize(sb, BBSIZE);
1498 22534 : sb->s_xattr = xfs_xattr_handlers;
1499 22534 : sb->s_export_op = &xfs_export_operations;
1500 : #ifdef CONFIG_XFS_QUOTA
1501 22534 : sb->s_qcop = &xfs_quotactl_operations;
1502 22534 : sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1503 : #endif
1504 22534 : sb->s_op = &xfs_super_operations;
1505 :
1506 : /*
1507 : * Delay mount work if the debug hook is set. This is debug
1508 : * instrumention to coordinate simulation of xfs mount failures with
1509 : * VFS superblock operations
1510 : */
1511 22534 : if (xfs_globals.mount_delay) {
1512 2 : xfs_notice(mp, "Delaying mount for %d seconds.",
1513 : xfs_globals.mount_delay);
1514 2 : msleep(xfs_globals.mount_delay * 1000);
1515 : }
1516 :
1517 22534 : if (fc->sb_flags & SB_SILENT)
1518 0 : flags |= XFS_MFSI_QUIET;
1519 :
1520 22534 : error = xfs_open_devices(mp);
1521 22534 : if (error)
1522 0 : goto out_free_names;
1523 :
1524 22534 : error = xfs_init_mount_workqueues(mp);
1525 22534 : if (error)
1526 0 : goto out_close_devices;
1527 :
1528 22534 : error = xfs_init_percpu_counters(mp);
1529 22534 : if (error)
1530 0 : goto out_destroy_workqueues;
1531 :
1532 22534 : error = xfs_inodegc_init_percpu(mp);
1533 22534 : if (error)
1534 0 : goto out_destroy_counters;
1535 :
1536 : /*
1537 : * All percpu data structures requiring cleanup when a cpu goes offline
1538 : * must be allocated before adding this @mp to the cpu-dead handler's
1539 : * mount list.
1540 : */
1541 22534 : xfs_mount_list_add(mp);
1542 :
1543 : /* Allocate stats memory before we do operations that might use it */
1544 22534 : mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1545 22534 : if (!mp->m_stats.xs_stats) {
1546 0 : error = -ENOMEM;
1547 0 : goto out_destroy_inodegc;
1548 : }
1549 :
1550 22534 : error = xfs_readsb(mp, flags);
1551 22534 : if (error)
1552 17 : goto out_free_stats;
1553 :
1554 22517 : error = xfs_finish_flags(mp);
1555 22517 : if (error)
1556 12 : goto out_free_sb;
1557 :
1558 22505 : error = xfs_setup_devices(mp);
1559 22505 : if (error)
1560 0 : goto out_free_sb;
1561 :
1562 : /* V4 support is undergoing deprecation. */
1563 22505 : if (!xfs_has_crc(mp)) {
1564 : #ifdef CONFIG_XFS_SUPPORT_V4
1565 44 : xfs_warn_once(mp,
1566 : "Deprecated V4 format (crc=0) will not be supported after September 2030.");
1567 : #else
1568 : xfs_warn(mp,
1569 : "Deprecated V4 format (crc=0) not supported by kernel.");
1570 : error = -EINVAL;
1571 : goto out_free_sb;
1572 : #endif
1573 : }
1574 :
1575 : /* ASCII case insensitivity is undergoing deprecation. */
1576 22505 : if (xfs_has_asciici(mp)) {
1577 : #ifdef CONFIG_XFS_SUPPORT_ASCII_CI
1578 26 : xfs_warn_once(mp,
1579 : "Deprecated ASCII case-insensitivity feature (ascii-ci=1) will not be supported after September 2030.");
1580 : #else
1581 : xfs_warn(mp,
1582 : "Deprecated ASCII case-insensitivity feature (ascii-ci=1) not supported by kernel.");
1583 : error = -EINVAL;
1584 : goto out_free_sb;
1585 : #endif
1586 : }
1587 :
1588 : /* Filesystem claims it needs repair, so refuse the mount. */
1589 22505 : if (xfs_has_needsrepair(mp)) {
1590 4 : xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair.");
1591 4 : error = -EFSCORRUPTED;
1592 4 : goto out_free_sb;
1593 : }
1594 :
1595 : /*
1596 : * Don't touch the filesystem if a user tool thinks it owns the primary
1597 : * superblock. mkfs doesn't clear the flag from secondary supers, so
1598 : * we don't check them at all.
1599 : */
1600 22501 : if (mp->m_sb.sb_inprogress) {
1601 0 : xfs_warn(mp, "Offline file system operation in progress!");
1602 0 : error = -EFSCORRUPTED;
1603 0 : goto out_free_sb;
1604 : }
1605 :
1606 : /*
1607 : * Until this is fixed only page-sized or smaller data blocks work.
1608 : */
1609 22501 : if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
1610 0 : xfs_warn(mp,
1611 : "File system with blocksize %d bytes. "
1612 : "Only pagesize (%ld) or less will currently work.",
1613 : mp->m_sb.sb_blocksize, PAGE_SIZE);
1614 0 : error = -ENOSYS;
1615 0 : goto out_free_sb;
1616 : }
1617 :
1618 : /* Ensure this filesystem fits in the page cache limits */
1619 45002 : if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) ||
1620 22501 : xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) {
1621 0 : xfs_warn(mp,
1622 : "file system too large to be mounted on this system.");
1623 0 : error = -EFBIG;
1624 0 : goto out_free_sb;
1625 : }
1626 :
1627 : /*
1628 : * XFS block mappings use 54 bits to store the logical block offset.
1629 : * This should suffice to handle the maximum file size that the VFS
1630 : * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
1631 : * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
1632 : * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
1633 : * to check this assertion.
1634 : *
1635 : * Avoid integer overflow by comparing the maximum bmbt offset to the
1636 : * maximum pagecache offset in units of fs blocks.
1637 : */
1638 22501 : if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
1639 0 : xfs_warn(mp,
1640 : "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
1641 : XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
1642 : XFS_MAX_FILEOFF);
1643 0 : error = -EINVAL;
1644 0 : goto out_free_sb;
1645 : }
1646 :
1647 22501 : error = xfs_filestream_mount(mp);
1648 22501 : if (error)
1649 0 : goto out_free_sb;
1650 :
1651 : /*
1652 : * we must configure the block size in the superblock before we run the
1653 : * full mount process as the mount process can lookup and cache inodes.
1654 : */
1655 22501 : sb->s_magic = XFS_SUPER_MAGIC;
1656 22501 : sb->s_blocksize = mp->m_sb.sb_blocksize;
1657 22501 : sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1658 22501 : sb->s_maxbytes = MAX_LFS_FILESIZE;
1659 22501 : sb->s_max_links = XFS_MAXLINK;
1660 22501 : sb->s_time_gran = 1;
1661 22501 : if (xfs_has_bigtime(mp)) {
1662 22443 : sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
1663 22443 : sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
1664 : } else {
1665 58 : sb->s_time_min = XFS_LEGACY_TIME_MIN;
1666 58 : sb->s_time_max = XFS_LEGACY_TIME_MAX;
1667 : }
1668 22501 : trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);
1669 22501 : sb->s_iflags |= SB_I_CGROUPWB;
1670 :
1671 22501 : set_posix_acl_flag(sb);
1672 :
1673 : /* version 5 superblocks support inode version counters. */
1674 22501 : if (xfs_has_crc(mp))
1675 22457 : sb->s_flags |= SB_I_VERSION;
1676 :
1677 22501 : if (xfs_has_dax_always(mp)) {
1678 0 : error = xfs_setup_dax_always(mp);
1679 0 : if (error)
1680 0 : goto out_filestream_unmount;
1681 : }
1682 :
1683 22501 : if (xfs_has_discard(mp) && !bdev_max_discard_sectors(sb->s_bdev)) {
1684 0 : xfs_warn(mp,
1685 : "mounting with \"discard\" option, but the device does not support discard");
1686 0 : mp->m_features &= ~XFS_FEAT_DISCARD;
1687 : }
1688 :
1689 22501 : if (xfs_has_reflink(mp)) {
1690 22274 : if (mp->m_sb.sb_rblocks) {
1691 0 : xfs_alert(mp,
1692 : "reflink not compatible with realtime device!");
1693 0 : error = -EINVAL;
1694 0 : goto out_filestream_unmount;
1695 : }
1696 :
1697 22274 : if (xfs_globals.always_cow) {
1698 0 : xfs_info(mp, "using DEBUG-only always_cow mode.");
1699 0 : mp->m_always_cow = true;
1700 : }
1701 : }
1702 :
1703 22501 : if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) {
1704 0 : xfs_alert(mp,
1705 : "reverse mapping btree not compatible with realtime device!");
1706 0 : error = -EINVAL;
1707 0 : goto out_filestream_unmount;
1708 : }
1709 :
1710 22501 : error = xfs_mountfs(mp);
1711 22501 : if (error)
1712 52 : goto out_filestream_unmount;
1713 :
1714 22449 : root = igrab(VFS_I(mp->m_rootip));
1715 22449 : if (!root) {
1716 0 : error = -ENOENT;
1717 0 : goto out_unmount;
1718 : }
1719 22449 : sb->s_root = d_make_root(root);
1720 22449 : if (!sb->s_root) {
1721 0 : error = -ENOMEM;
1722 0 : goto out_unmount;
1723 : }
1724 :
1725 : return 0;
1726 :
1727 52 : out_filestream_unmount:
1728 52 : xfs_filestream_unmount(mp);
1729 68 : out_free_sb:
1730 68 : xfs_freesb(mp);
1731 85 : out_free_stats:
1732 85 : free_percpu(mp->m_stats.xs_stats);
1733 85 : out_destroy_inodegc:
1734 85 : xfs_mount_list_del(mp);
1735 85 : xfs_inodegc_free_percpu(mp);
1736 85 : out_destroy_counters:
1737 85 : xfs_destroy_percpu_counters(mp);
1738 85 : out_destroy_workqueues:
1739 85 : xfs_destroy_mount_workqueues(mp);
1740 85 : out_close_devices:
1741 85 : xfs_close_devices(mp);
1742 99 : out_free_names:
1743 99 : sb->s_fs_info = NULL;
1744 99 : xfs_mount_free(mp);
1745 99 : return error;
1746 :
1747 0 : out_unmount:
1748 0 : xfs_filestream_unmount(mp);
1749 0 : xfs_unmountfs(mp);
1750 0 : goto out_free_sb;
1751 : }
1752 :
1753 : static int
1754 23155 : xfs_fs_get_tree(
1755 : struct fs_context *fc)
1756 : {
1757 23155 : return get_tree_bdev(fc, xfs_fs_fill_super);
1758 : }
1759 :
1760 : static int
1761 433 : xfs_remount_rw(
1762 : struct xfs_mount *mp)
1763 : {
1764 433 : struct xfs_sb *sbp = &mp->m_sb;
1765 433 : int error;
1766 :
1767 433 : if (xfs_has_norecovery(mp)) {
1768 2 : xfs_warn(mp,
1769 : "ro->rw transition prohibited on norecovery mount");
1770 2 : return -EINVAL;
1771 : }
1772 :
1773 431 : if (xfs_sb_is_v5(sbp) &&
1774 : xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1775 2 : xfs_warn(mp,
1776 : "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1777 : (sbp->sb_features_ro_compat &
1778 : XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1779 2 : return -EINVAL;
1780 : }
1781 :
1782 429 : clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1783 :
1784 : /*
1785 : * If this is the first remount to writeable state we might have some
1786 : * superblock changes to update.
1787 : */
1788 429 : if (mp->m_update_sb) {
1789 2 : error = xfs_sync_sb(mp, false);
1790 2 : if (error) {
1791 0 : xfs_warn(mp, "failed to write sb changes");
1792 0 : return error;
1793 : }
1794 2 : mp->m_update_sb = false;
1795 : }
1796 :
1797 : /*
1798 : * Fill out the reserve pool if it is empty. Use the stashed value if
1799 : * it is non-zero, otherwise go with the default.
1800 : */
1801 429 : xfs_restore_resvblks(mp);
1802 429 : xfs_log_work_queue(mp);
1803 429 : xfs_blockgc_start(mp);
1804 :
1805 : /* Create the per-AG metadata reservation pool .*/
1806 429 : error = xfs_fs_reserve_ag_blocks(mp);
1807 429 : if (error && error != -ENOSPC)
1808 : return error;
1809 :
1810 : /* Re-enable the background inode inactivation worker. */
1811 429 : xfs_inodegc_start(mp);
1812 :
1813 429 : return 0;
1814 : }
1815 :
1816 : static int
1817 439 : xfs_remount_ro(
1818 : struct xfs_mount *mp)
1819 : {
1820 439 : struct xfs_icwalk icw = {
1821 : .icw_flags = XFS_ICWALK_FLAG_SYNC,
1822 : };
1823 439 : int error;
1824 :
1825 : /* Flush all the dirty data to disk. */
1826 439 : error = sync_filesystem(mp->m_super);
1827 439 : if (error)
1828 : return error;
1829 :
1830 : /*
1831 : * Cancel background eofb scanning so it cannot race with the final
1832 : * log force+buftarg wait and deadlock the remount.
1833 : */
1834 439 : xfs_blockgc_stop(mp);
1835 :
1836 : /*
1837 : * Clear out all remaining COW staging extents and speculative post-EOF
1838 : * preallocations so that we don't leave inodes requiring inactivation
1839 : * cleanups during reclaim on a read-only mount. We must process every
1840 : * cached inode, so this requires a synchronous cache scan.
1841 : */
1842 439 : error = xfs_blockgc_free_space(mp, &icw);
1843 439 : if (error) {
1844 0 : xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1845 0 : return error;
1846 : }
1847 :
1848 : /*
1849 : * Stop the inodegc background worker. xfs_fs_reconfigure already
1850 : * flushed all pending inodegc work when it sync'd the filesystem.
1851 : * The VFS holds s_umount, so we know that inodes cannot enter
1852 : * xfs_fs_destroy_inode during a remount operation. In readonly mode
1853 : * we send inodes straight to reclaim, so no inodes will be queued.
1854 : */
1855 439 : xfs_inodegc_stop(mp);
1856 :
1857 : /* Free the per-AG metadata reservation pool. */
1858 439 : error = xfs_fs_unreserve_ag_blocks(mp);
1859 439 : if (error) {
1860 0 : xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1861 0 : return error;
1862 : }
1863 :
1864 : /*
1865 : * Before we sync the metadata, we need to free up the reserve block
1866 : * pool so that the used block count in the superblock on disk is
1867 : * correct at the end of the remount. Stash the current* reserve pool
1868 : * size so that if we get remounted rw, we can return it to the same
1869 : * size.
1870 : */
1871 439 : xfs_save_resvblks(mp);
1872 :
1873 439 : xfs_log_clean(mp);
1874 439 : set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1875 :
1876 : return 0;
1877 : }
1878 :
1879 : /*
1880 : * Logically we would return an error here to prevent users from believing
1881 : * they might have changed mount options using remount which can't be changed.
1882 : *
1883 : * But unfortunately mount(8) adds all options from mtab and fstab to the mount
1884 : * arguments in some cases so we can't blindly reject options, but have to
1885 : * check for each specified option if it actually differs from the currently
1886 : * set option and only reject it if that's the case.
1887 : *
1888 : * Until that is implemented we return success for every remount request, and
1889 : * silently ignore all options that we can't actually change.
1890 : */
1891 : static int
1892 899 : xfs_fs_reconfigure(
1893 : struct fs_context *fc)
1894 : {
1895 899 : struct xfs_mount *mp = XFS_M(fc->root->d_sb);
1896 899 : struct xfs_mount *new_mp = fc->s_fs_info;
1897 899 : int flags = fc->sb_flags;
1898 899 : int error;
1899 :
1900 : /* version 5 superblocks always support version counters. */
1901 899 : if (xfs_has_crc(mp))
1902 897 : fc->sb_flags |= SB_I_VERSION;
1903 :
1904 899 : error = xfs_fs_validate_params(new_mp);
1905 899 : if (error)
1906 : return error;
1907 :
1908 : /* inode32 -> inode64 */
1909 899 : if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) {
1910 0 : mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
1911 0 : mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
1912 : }
1913 :
1914 : /* inode64 -> inode32 */
1915 899 : if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) {
1916 0 : mp->m_features |= XFS_FEAT_SMALL_INUMS;
1917 0 : mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
1918 : }
1919 :
1920 : /* ro -> rw */
1921 1798 : if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) {
1922 433 : error = xfs_remount_rw(mp);
1923 433 : if (error)
1924 : return error;
1925 : }
1926 :
1927 : /* rw -> ro */
1928 1790 : if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) {
1929 439 : error = xfs_remount_ro(mp);
1930 439 : if (error)
1931 0 : return error;
1932 : }
1933 :
1934 : return 0;
1935 : }
1936 :
1937 25078 : static void xfs_fs_free(
1938 : struct fs_context *fc)
1939 : {
1940 25078 : struct xfs_mount *mp = fc->s_fs_info;
1941 :
1942 : /*
1943 : * mp is stored in the fs_context when it is initialized.
1944 : * mp is transferred to the superblock on a successful mount,
1945 : * but if an error occurs before the transfer we have to free
1946 : * it here.
1947 : */
1948 25078 : if (mp)
1949 2530 : xfs_mount_free(mp);
1950 25078 : }
1951 :
1952 : static const struct fs_context_operations xfs_context_ops = {
1953 : .parse_param = xfs_fs_parse_param,
1954 : .get_tree = xfs_fs_get_tree,
1955 : .reconfigure = xfs_fs_reconfigure,
1956 : .free = xfs_fs_free,
1957 : };
1958 :
1959 25078 : static int xfs_init_fs_context(
1960 : struct fs_context *fc)
1961 : {
1962 25078 : struct xfs_mount *mp;
1963 :
1964 25078 : mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
1965 25078 : if (!mp)
1966 : return -ENOMEM;
1967 :
1968 25078 : spin_lock_init(&mp->m_sb_lock);
1969 25078 : INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1970 25078 : spin_lock_init(&mp->m_perag_lock);
1971 25078 : mutex_init(&mp->m_growlock);
1972 25078 : INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);
1973 25078 : INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1974 25078 : mp->m_kobj.kobject.kset = xfs_kset;
1975 : /*
1976 : * We don't create the finobt per-ag space reservation until after log
1977 : * recovery, so we must set this to true so that an ifree transaction
1978 : * started during log recovery will not depend on space reservations
1979 : * for finobt expansion.
1980 : */
1981 25078 : mp->m_finobt_nores = true;
1982 :
1983 : /*
1984 : * These can be overridden by the mount option parsing.
1985 : */
1986 25078 : mp->m_logbufs = -1;
1987 25078 : mp->m_logbsize = -1;
1988 25078 : mp->m_allocsize_log = 16; /* 64k */
1989 :
1990 : /*
1991 : * Copy binary VFS mount flags we are interested in.
1992 : */
1993 25078 : if (fc->sb_flags & SB_RDONLY)
1994 3483 : set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1995 25078 : if (fc->sb_flags & SB_DIRSYNC)
1996 0 : mp->m_features |= XFS_FEAT_DIRSYNC;
1997 25078 : if (fc->sb_flags & SB_SYNCHRONOUS)
1998 64 : mp->m_features |= XFS_FEAT_WSYNC;
1999 :
2000 25078 : fc->s_fs_info = mp;
2001 25078 : fc->ops = &xfs_context_ops;
2002 :
2003 25078 : return 0;
2004 : }
2005 :
2006 : static struct file_system_type xfs_fs_type = {
2007 : .owner = THIS_MODULE,
2008 : .name = "xfs",
2009 : .init_fs_context = xfs_init_fs_context,
2010 : .parameters = xfs_fs_parameters,
2011 : .kill_sb = kill_block_super,
2012 : .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
2013 : };
2014 : MODULE_ALIAS_FS("xfs");
2015 :
2016 : STATIC int __init
2017 12 : xfs_init_caches(void)
2018 : {
2019 12 : int error;
2020 :
2021 12 : xfs_buf_cache = kmem_cache_create("xfs_buf", sizeof(struct xfs_buf), 0,
2022 : SLAB_HWCACHE_ALIGN |
2023 : SLAB_RECLAIM_ACCOUNT |
2024 : SLAB_MEM_SPREAD,
2025 : NULL);
2026 12 : if (!xfs_buf_cache)
2027 0 : goto out;
2028 :
2029 12 : xfs_log_ticket_cache = kmem_cache_create("xfs_log_ticket",
2030 : sizeof(struct xlog_ticket),
2031 : 0, 0, NULL);
2032 12 : if (!xfs_log_ticket_cache)
2033 0 : goto out_destroy_buf_cache;
2034 :
2035 12 : error = xfs_btree_init_cur_caches();
2036 12 : if (error)
2037 0 : goto out_destroy_log_ticket_cache;
2038 :
2039 12 : error = xfs_defer_init_item_caches();
2040 12 : if (error)
2041 0 : goto out_destroy_btree_cur_cache;
2042 :
2043 12 : xfs_da_state_cache = kmem_cache_create("xfs_da_state",
2044 : sizeof(struct xfs_da_state),
2045 : 0, 0, NULL);
2046 12 : if (!xfs_da_state_cache)
2047 0 : goto out_destroy_defer_item_cache;
2048 :
2049 12 : xfs_ifork_cache = kmem_cache_create("xfs_ifork",
2050 : sizeof(struct xfs_ifork),
2051 : 0, 0, NULL);
2052 12 : if (!xfs_ifork_cache)
2053 0 : goto out_destroy_da_state_cache;
2054 :
2055 12 : xfs_trans_cache = kmem_cache_create("xfs_trans",
2056 : sizeof(struct xfs_trans),
2057 : 0, 0, NULL);
2058 12 : if (!xfs_trans_cache)
2059 0 : goto out_destroy_ifork_cache;
2060 :
2061 :
2062 : /*
2063 : * The size of the cache-allocated buf log item is the maximum
2064 : * size possible under XFS. This wastes a little bit of memory,
2065 : * but it is much faster.
2066 : */
2067 12 : xfs_buf_item_cache = kmem_cache_create("xfs_buf_item",
2068 : sizeof(struct xfs_buf_log_item),
2069 : 0, 0, NULL);
2070 12 : if (!xfs_buf_item_cache)
2071 0 : goto out_destroy_trans_cache;
2072 :
2073 12 : xfs_efd_cache = kmem_cache_create("xfs_efd_item",
2074 : xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS),
2075 : 0, 0, NULL);
2076 12 : if (!xfs_efd_cache)
2077 0 : goto out_destroy_buf_item_cache;
2078 :
2079 12 : xfs_efi_cache = kmem_cache_create("xfs_efi_item",
2080 : xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS),
2081 : 0, 0, NULL);
2082 12 : if (!xfs_efi_cache)
2083 0 : goto out_destroy_efd_cache;
2084 :
2085 12 : xfs_inode_cache = kmem_cache_create("xfs_inode",
2086 : sizeof(struct xfs_inode), 0,
2087 : (SLAB_HWCACHE_ALIGN |
2088 : SLAB_RECLAIM_ACCOUNT |
2089 : SLAB_MEM_SPREAD | SLAB_ACCOUNT),
2090 : xfs_fs_inode_init_once);
2091 12 : if (!xfs_inode_cache)
2092 0 : goto out_destroy_efi_cache;
2093 :
2094 12 : xfs_ili_cache = kmem_cache_create("xfs_ili",
2095 : sizeof(struct xfs_inode_log_item), 0,
2096 : SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
2097 : NULL);
2098 12 : if (!xfs_ili_cache)
2099 0 : goto out_destroy_inode_cache;
2100 :
2101 12 : xfs_icreate_cache = kmem_cache_create("xfs_icr",
2102 : sizeof(struct xfs_icreate_item),
2103 : 0, 0, NULL);
2104 12 : if (!xfs_icreate_cache)
2105 0 : goto out_destroy_ili_cache;
2106 :
2107 12 : xfs_rud_cache = kmem_cache_create("xfs_rud_item",
2108 : sizeof(struct xfs_rud_log_item),
2109 : 0, 0, NULL);
2110 12 : if (!xfs_rud_cache)
2111 0 : goto out_destroy_icreate_cache;
2112 :
2113 12 : xfs_rui_cache = kmem_cache_create("xfs_rui_item",
2114 : xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
2115 : 0, 0, NULL);
2116 12 : if (!xfs_rui_cache)
2117 0 : goto out_destroy_rud_cache;
2118 :
2119 12 : xfs_cud_cache = kmem_cache_create("xfs_cud_item",
2120 : sizeof(struct xfs_cud_log_item),
2121 : 0, 0, NULL);
2122 12 : if (!xfs_cud_cache)
2123 0 : goto out_destroy_rui_cache;
2124 :
2125 12 : xfs_cui_cache = kmem_cache_create("xfs_cui_item",
2126 : xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
2127 : 0, 0, NULL);
2128 12 : if (!xfs_cui_cache)
2129 0 : goto out_destroy_cud_cache;
2130 :
2131 12 : xfs_bud_cache = kmem_cache_create("xfs_bud_item",
2132 : sizeof(struct xfs_bud_log_item),
2133 : 0, 0, NULL);
2134 12 : if (!xfs_bud_cache)
2135 0 : goto out_destroy_cui_cache;
2136 :
2137 12 : xfs_bui_cache = kmem_cache_create("xfs_bui_item",
2138 : xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
2139 : 0, 0, NULL);
2140 12 : if (!xfs_bui_cache)
2141 0 : goto out_destroy_bud_cache;
2142 :
2143 12 : xfs_attrd_cache = kmem_cache_create("xfs_attrd_item",
2144 : sizeof(struct xfs_attrd_log_item),
2145 : 0, 0, NULL);
2146 12 : if (!xfs_attrd_cache)
2147 0 : goto out_destroy_bui_cache;
2148 :
2149 12 : xfs_attri_cache = kmem_cache_create("xfs_attri_item",
2150 : sizeof(struct xfs_attri_log_item),
2151 : 0, 0, NULL);
2152 12 : if (!xfs_attri_cache)
2153 0 : goto out_destroy_attrd_cache;
2154 :
2155 12 : xfs_iunlink_cache = kmem_cache_create("xfs_iul_item",
2156 : sizeof(struct xfs_iunlink_item),
2157 : 0, 0, NULL);
2158 12 : if (!xfs_iunlink_cache)
2159 0 : goto out_destroy_attri_cache;
2160 :
2161 : return 0;
2162 :
2163 : out_destroy_attri_cache:
2164 0 : kmem_cache_destroy(xfs_attri_cache);
2165 0 : out_destroy_attrd_cache:
2166 0 : kmem_cache_destroy(xfs_attrd_cache);
2167 0 : out_destroy_bui_cache:
2168 0 : kmem_cache_destroy(xfs_bui_cache);
2169 0 : out_destroy_bud_cache:
2170 0 : kmem_cache_destroy(xfs_bud_cache);
2171 0 : out_destroy_cui_cache:
2172 0 : kmem_cache_destroy(xfs_cui_cache);
2173 0 : out_destroy_cud_cache:
2174 0 : kmem_cache_destroy(xfs_cud_cache);
2175 0 : out_destroy_rui_cache:
2176 0 : kmem_cache_destroy(xfs_rui_cache);
2177 0 : out_destroy_rud_cache:
2178 0 : kmem_cache_destroy(xfs_rud_cache);
2179 0 : out_destroy_icreate_cache:
2180 0 : kmem_cache_destroy(xfs_icreate_cache);
2181 0 : out_destroy_ili_cache:
2182 0 : kmem_cache_destroy(xfs_ili_cache);
2183 0 : out_destroy_inode_cache:
2184 0 : kmem_cache_destroy(xfs_inode_cache);
2185 0 : out_destroy_efi_cache:
2186 0 : kmem_cache_destroy(xfs_efi_cache);
2187 0 : out_destroy_efd_cache:
2188 0 : kmem_cache_destroy(xfs_efd_cache);
2189 0 : out_destroy_buf_item_cache:
2190 0 : kmem_cache_destroy(xfs_buf_item_cache);
2191 0 : out_destroy_trans_cache:
2192 0 : kmem_cache_destroy(xfs_trans_cache);
2193 0 : out_destroy_ifork_cache:
2194 0 : kmem_cache_destroy(xfs_ifork_cache);
2195 0 : out_destroy_da_state_cache:
2196 0 : kmem_cache_destroy(xfs_da_state_cache);
2197 0 : out_destroy_defer_item_cache:
2198 0 : xfs_defer_destroy_item_caches();
2199 0 : out_destroy_btree_cur_cache:
2200 0 : xfs_btree_destroy_cur_caches();
2201 0 : out_destroy_log_ticket_cache:
2202 0 : kmem_cache_destroy(xfs_log_ticket_cache);
2203 0 : out_destroy_buf_cache:
2204 0 : kmem_cache_destroy(xfs_buf_cache);
2205 : out:
2206 : return -ENOMEM;
2207 : }
2208 :
2209 : STATIC void
2210 12 : xfs_destroy_caches(void)
2211 : {
2212 : /*
2213 : * Make sure all delayed rcu free are flushed before we
2214 : * destroy caches.
2215 : */
2216 12 : rcu_barrier();
2217 12 : kmem_cache_destroy(xfs_iunlink_cache);
2218 12 : kmem_cache_destroy(xfs_attri_cache);
2219 12 : kmem_cache_destroy(xfs_attrd_cache);
2220 12 : kmem_cache_destroy(xfs_bui_cache);
2221 12 : kmem_cache_destroy(xfs_bud_cache);
2222 12 : kmem_cache_destroy(xfs_cui_cache);
2223 12 : kmem_cache_destroy(xfs_cud_cache);
2224 12 : kmem_cache_destroy(xfs_rui_cache);
2225 12 : kmem_cache_destroy(xfs_rud_cache);
2226 12 : kmem_cache_destroy(xfs_icreate_cache);
2227 12 : kmem_cache_destroy(xfs_ili_cache);
2228 12 : kmem_cache_destroy(xfs_inode_cache);
2229 12 : kmem_cache_destroy(xfs_efi_cache);
2230 12 : kmem_cache_destroy(xfs_efd_cache);
2231 12 : kmem_cache_destroy(xfs_buf_item_cache);
2232 12 : kmem_cache_destroy(xfs_trans_cache);
2233 12 : kmem_cache_destroy(xfs_ifork_cache);
2234 12 : kmem_cache_destroy(xfs_da_state_cache);
2235 12 : xfs_defer_destroy_item_caches();
2236 12 : xfs_btree_destroy_cur_caches();
2237 12 : kmem_cache_destroy(xfs_log_ticket_cache);
2238 12 : kmem_cache_destroy(xfs_buf_cache);
2239 12 : }
2240 :
2241 : STATIC int __init
2242 12 : xfs_init_workqueues(void)
2243 : {
2244 : /*
2245 : * The allocation workqueue can be used in memory reclaim situations
2246 : * (writepage path), and parallelism is only limited by the number of
2247 : * AGs in all the filesystems mounted. Hence use the default large
2248 : * max_active value for this workqueue.
2249 : */
2250 12 : xfs_alloc_wq = alloc_workqueue("xfsalloc",
2251 : XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0);
2252 12 : if (!xfs_alloc_wq)
2253 : return -ENOMEM;
2254 :
2255 12 : xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND),
2256 : 0);
2257 12 : if (!xfs_discard_wq)
2258 0 : goto out_free_alloc_wq;
2259 :
2260 : return 0;
2261 : out_free_alloc_wq:
2262 0 : destroy_workqueue(xfs_alloc_wq);
2263 0 : return -ENOMEM;
2264 : }
2265 :
2266 : STATIC void
2267 12 : xfs_destroy_workqueues(void)
2268 : {
2269 12 : destroy_workqueue(xfs_discard_wq);
2270 12 : destroy_workqueue(xfs_alloc_wq);
2271 12 : }
2272 :
2273 : #ifdef CONFIG_HOTPLUG_CPU
2274 : static int
2275 15 : xfs_cpu_dead(
2276 : unsigned int cpu)
2277 : {
2278 15 : struct xfs_mount *mp, *n;
2279 :
2280 15 : spin_lock(&xfs_mount_list_lock);
2281 30 : list_for_each_entry_safe(mp, n, &xfs_mount_list, m_mount_list) {
2282 15 : spin_unlock(&xfs_mount_list_lock);
2283 15 : xfs_inodegc_cpu_dead(mp, cpu);
2284 15 : xlog_cil_pcp_dead(mp->m_log, cpu);
2285 15 : spin_lock(&xfs_mount_list_lock);
2286 : }
2287 15 : spin_unlock(&xfs_mount_list_lock);
2288 15 : return 0;
2289 : }
2290 :
2291 : static int __init
2292 12 : xfs_cpu_hotplug_init(void)
2293 : {
2294 12 : int error;
2295 :
2296 12 : error = cpuhp_setup_state_nocalls(CPUHP_XFS_DEAD, "xfs:dead", NULL,
2297 : xfs_cpu_dead);
2298 12 : if (error < 0)
2299 0 : xfs_alert(NULL,
2300 : "Failed to initialise CPU hotplug, error %d. XFS is non-functional.",
2301 : error);
2302 12 : return error;
2303 : }
2304 :
2305 : static void
2306 : xfs_cpu_hotplug_destroy(void)
2307 : {
2308 12 : cpuhp_remove_state_nocalls(CPUHP_XFS_DEAD);
2309 0 : }
2310 :
2311 : #else /* !CONFIG_HOTPLUG_CPU */
2312 : static inline int xfs_cpu_hotplug_init(void) { return 0; }
2313 : static inline void xfs_cpu_hotplug_destroy(void) {}
2314 : #endif
2315 :
2316 : STATIC int __init
2317 12 : init_xfs_fs(void)
2318 : {
2319 12 : int error;
2320 :
2321 12 : xfs_check_ondisk_structs();
2322 :
2323 12 : error = xfs_dahash_test();
2324 12 : if (error)
2325 : return error;
2326 :
2327 12 : printk(KERN_INFO XFS_VERSION_STRING " with "
2328 : XFS_BUILD_OPTIONS " enabled\n");
2329 :
2330 12 : xfs_dir_startup();
2331 :
2332 12 : error = xfs_cpu_hotplug_init();
2333 12 : if (error)
2334 0 : goto out;
2335 :
2336 12 : error = xfs_init_caches();
2337 12 : if (error)
2338 0 : goto out_destroy_hp;
2339 :
2340 12 : error = xfs_init_workqueues();
2341 12 : if (error)
2342 0 : goto out_destroy_caches;
2343 :
2344 12 : error = xfs_mru_cache_init();
2345 12 : if (error)
2346 0 : goto out_destroy_wq;
2347 :
2348 12 : error = xfs_init_procfs();
2349 12 : if (error)
2350 0 : goto out_mru_cache_uninit;
2351 :
2352 12 : error = xfs_sysctl_register();
2353 12 : if (error)
2354 0 : goto out_cleanup_procfs;
2355 :
2356 12 : xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2357 12 : if (!xfs_kset) {
2358 0 : error = -ENOMEM;
2359 0 : goto out_sysctl_unregister;
2360 : }
2361 :
2362 12 : xfsstats.xs_kobj.kobject.kset = xfs_kset;
2363 :
2364 12 : xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2365 12 : if (!xfsstats.xs_stats) {
2366 0 : error = -ENOMEM;
2367 0 : goto out_kset_unregister;
2368 : }
2369 :
2370 12 : error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2371 : "stats");
2372 12 : if (error)
2373 0 : goto out_free_stats;
2374 :
2375 : #ifdef DEBUG
2376 12 : xfs_dbg_kobj.kobject.kset = xfs_kset;
2377 12 : error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2378 12 : if (error)
2379 0 : goto out_remove_stats_kobj;
2380 : #endif
2381 :
2382 12 : error = xfs_qm_init();
2383 12 : if (error)
2384 0 : goto out_remove_dbg_kobj;
2385 :
2386 12 : error = register_filesystem(&xfs_fs_type);
2387 12 : if (error)
2388 0 : goto out_qm_exit;
2389 : return 0;
2390 :
2391 : out_qm_exit:
2392 0 : xfs_qm_exit();
2393 0 : out_remove_dbg_kobj:
2394 : #ifdef DEBUG
2395 0 : xfs_sysfs_del(&xfs_dbg_kobj);
2396 0 : out_remove_stats_kobj:
2397 : #endif
2398 0 : xfs_sysfs_del(&xfsstats.xs_kobj);
2399 0 : out_free_stats:
2400 0 : free_percpu(xfsstats.xs_stats);
2401 0 : out_kset_unregister:
2402 0 : kset_unregister(xfs_kset);
2403 0 : out_sysctl_unregister:
2404 0 : xfs_sysctl_unregister();
2405 0 : out_cleanup_procfs:
2406 0 : xfs_cleanup_procfs();
2407 0 : out_mru_cache_uninit:
2408 0 : xfs_mru_cache_uninit();
2409 0 : out_destroy_wq:
2410 0 : xfs_destroy_workqueues();
2411 0 : out_destroy_caches:
2412 0 : xfs_destroy_caches();
2413 0 : out_destroy_hp:
2414 0 : xfs_cpu_hotplug_destroy();
2415 : out:
2416 : return error;
2417 : }
2418 :
2419 : STATIC void __exit
2420 12 : exit_xfs_fs(void)
2421 : {
2422 12 : xfs_qm_exit();
2423 12 : unregister_filesystem(&xfs_fs_type);
2424 : #ifdef DEBUG
2425 12 : xfs_sysfs_del(&xfs_dbg_kobj);
2426 : #endif
2427 12 : xfs_sysfs_del(&xfsstats.xs_kobj);
2428 12 : free_percpu(xfsstats.xs_stats);
2429 12 : kset_unregister(xfs_kset);
2430 12 : xfs_sysctl_unregister();
2431 12 : xfs_cleanup_procfs();
2432 12 : xfs_mru_cache_uninit();
2433 12 : xfs_destroy_workqueues();
2434 12 : xfs_destroy_caches();
2435 12 : xfs_uuid_table_free();
2436 12 : xfs_cpu_hotplug_destroy();
2437 12 : }
2438 :
2439 : module_init(init_xfs_fs);
2440 : module_exit(exit_xfs_fs);
2441 :
2442 : MODULE_AUTHOR("Silicon Graphics, Inc.");
2443 : MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2444 : MODULE_LICENSE("GPL");
|
