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1/*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "xfs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_inum.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
27#include "xfs_mount.h"
28#include "xfs_da_format.h"
29#include "xfs_inode.h"
30#include "xfs_btree.h"
31#include "xfs_bmap.h"
32#include "xfs_alloc.h"
33#include "xfs_error.h"
34#include "xfs_fsops.h"
35#include "xfs_trans.h"
36#include "xfs_buf_item.h"
37#include "xfs_log.h"
38#include "xfs_log_priv.h"
39#include "xfs_da_btree.h"
40#include "xfs_dir2.h"
41#include "xfs_extfree_item.h"
42#include "xfs_mru_cache.h"
43#include "xfs_inode_item.h"
44#include "xfs_icache.h"
45#include "xfs_trace.h"
46#include "xfs_icreate_item.h"
47#include "xfs_dinode.h"
48#include "xfs_filestream.h"
49#include "xfs_quota.h"
50
51#include <linux/namei.h>
52#include <linux/init.h>
53#include <linux/slab.h>
54#include <linux/mount.h>
55#include <linux/mempool.h>
56#include <linux/writeback.h>
57#include <linux/kthread.h>
58#include <linux/freezer.h>
59#include <linux/parser.h>
60
61static const struct super_operations xfs_super_operations;
62static kmem_zone_t *xfs_ioend_zone;
63mempool_t *xfs_ioend_pool;
64
65#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
66#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
67#define MNTOPT_LOGDEV "logdev" /* log device */
68#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
69#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
70#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
71#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
72#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
73#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
74#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
75#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
76#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
77#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
78#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
79#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
80#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
81#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
82#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
83#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
84 * unwritten extent conversion */
85#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
86#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
87#define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
88 * XFS_MAXINUMBER_32 */
89#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
90#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
91#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
92#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
93 * in stat(). */
94#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
95#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
96#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
97#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
98#define MNTOPT_NOQUOTA "noquota" /* no quotas */
99#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
100#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
101#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
102#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
103#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
104#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
105#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
106#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
107#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
108#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
109#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
110#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
111#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
112#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
113
114/*
115 * Table driven mount option parser.
116 *
117 * Currently only used for remount, but it will be used for mount
118 * in the future, too.
119 */
120enum {
121 Opt_barrier,
122 Opt_nobarrier,
123 Opt_inode64,
124 Opt_inode32,
125 Opt_err
126};
127
128static const match_table_t tokens = {
129 {Opt_barrier, "barrier"},
130 {Opt_nobarrier, "nobarrier"},
131 {Opt_inode64, "inode64"},
132 {Opt_inode32, "inode32"},
133 {Opt_err, NULL}
134};
135
136
137STATIC unsigned long
138suffix_kstrtoint(char *s, unsigned int base, int *res)
139{
140 int last, shift_left_factor = 0, _res;
141 char *value = s;
142
143 last = strlen(value) - 1;
144 if (value[last] == 'K' || value[last] == 'k') {
145 shift_left_factor = 10;
146 value[last] = '\0';
147 }
148 if (value[last] == 'M' || value[last] == 'm') {
149 shift_left_factor = 20;
150 value[last] = '\0';
151 }
152 if (value[last] == 'G' || value[last] == 'g') {
153 shift_left_factor = 30;
154 value[last] = '\0';
155 }
156
157 if (kstrtoint(s, base, &_res))
158 return -EINVAL;
159 *res = _res << shift_left_factor;
160 return 0;
161}
162
163/*
164 * This function fills in xfs_mount_t fields based on mount args.
165 * Note: the superblock has _not_ yet been read in.
166 *
167 * Note that this function leaks the various device name allocations on
168 * failure. The caller takes care of them.
169 */
170STATIC int
171xfs_parseargs(
172 struct xfs_mount *mp,
173 char *options)
174{
175 struct super_block *sb = mp->m_super;
176 char *this_char, *value;
177 int dsunit = 0;
178 int dswidth = 0;
179 int iosize = 0;
180 __uint8_t iosizelog = 0;
181
182 /*
183 * set up the mount name first so all the errors will refer to the
184 * correct device.
185 */
186 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
187 if (!mp->m_fsname)
188 return ENOMEM;
189 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
190
191 /*
192 * Copy binary VFS mount flags we are interested in.
193 */
194 if (sb->s_flags & MS_RDONLY)
195 mp->m_flags |= XFS_MOUNT_RDONLY;
196 if (sb->s_flags & MS_DIRSYNC)
197 mp->m_flags |= XFS_MOUNT_DIRSYNC;
198 if (sb->s_flags & MS_SYNCHRONOUS)
199 mp->m_flags |= XFS_MOUNT_WSYNC;
200
201 /*
202 * Set some default flags that could be cleared by the mount option
203 * parsing.
204 */
205 mp->m_flags |= XFS_MOUNT_BARRIER;
206 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
207#if !XFS_BIG_INUMS
208 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
209#endif
210
211 /*
212 * These can be overridden by the mount option parsing.
213 */
214 mp->m_logbufs = -1;
215 mp->m_logbsize = -1;
216
217 if (!options)
218 goto done;
219
220 while ((this_char = strsep(&options, ",")) != NULL) {
221 if (!*this_char)
222 continue;
223 if ((value = strchr(this_char, '=')) != NULL)
224 *value++ = 0;
225
226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
227 if (!value || !*value) {
228 xfs_warn(mp, "%s option requires an argument",
229 this_char);
230 return EINVAL;
231 }
232 if (kstrtoint(value, 10, &mp->m_logbufs))
233 return EINVAL;
234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
235 if (!value || !*value) {
236 xfs_warn(mp, "%s option requires an argument",
237 this_char);
238 return EINVAL;
239 }
240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
241 return EINVAL;
242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
243 if (!value || !*value) {
244 xfs_warn(mp, "%s option requires an argument",
245 this_char);
246 return EINVAL;
247 }
248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 if (!mp->m_logname)
250 return ENOMEM;
251 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
252 xfs_warn(mp, "%s option not allowed on this system",
253 this_char);
254 return EINVAL;
255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
256 if (!value || !*value) {
257 xfs_warn(mp, "%s option requires an argument",
258 this_char);
259 return EINVAL;
260 }
261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
262 if (!mp->m_rtname)
263 return ENOMEM;
264 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
265 if (!value || !*value) {
266 xfs_warn(mp, "%s option requires an argument",
267 this_char);
268 return EINVAL;
269 }
270 if (kstrtoint(value, 10, &iosize))
271 return EINVAL;
272 iosizelog = ffs(iosize) - 1;
273 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
274 if (!value || !*value) {
275 xfs_warn(mp, "%s option requires an argument",
276 this_char);
277 return EINVAL;
278 }
279 if (suffix_kstrtoint(value, 10, &iosize))
280 return EINVAL;
281 iosizelog = ffs(iosize) - 1;
282 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
283 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
284 mp->m_flags |= XFS_MOUNT_GRPID;
285 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
286 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
287 mp->m_flags &= ~XFS_MOUNT_GRPID;
288 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
289 mp->m_flags |= XFS_MOUNT_WSYNC;
290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
291 mp->m_flags |= XFS_MOUNT_NORECOVERY;
292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
293 mp->m_flags |= XFS_MOUNT_NOALIGN;
294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
295 mp->m_flags |= XFS_MOUNT_SWALLOC;
296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
297 if (!value || !*value) {
298 xfs_warn(mp, "%s option requires an argument",
299 this_char);
300 return EINVAL;
301 }
302 if (kstrtoint(value, 10, &dsunit))
303 return EINVAL;
304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
305 if (!value || !*value) {
306 xfs_warn(mp, "%s option requires an argument",
307 this_char);
308 return EINVAL;
309 }
310 if (kstrtoint(value, 10, &dswidth))
311 return EINVAL;
312 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
313 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
314 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
315 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
316#if !XFS_BIG_INUMS
317 xfs_warn(mp, "%s option not allowed on this system",
318 this_char);
319 return EINVAL;
320#endif
321 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
322 mp->m_flags |= XFS_MOUNT_NOUUID;
323 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
324 mp->m_flags |= XFS_MOUNT_BARRIER;
325 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
326 mp->m_flags &= ~XFS_MOUNT_BARRIER;
327 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
328 mp->m_flags |= XFS_MOUNT_IKEEP;
329 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
330 mp->m_flags &= ~XFS_MOUNT_IKEEP;
331 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
332 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
333 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
334 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
335 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
336 mp->m_flags |= XFS_MOUNT_ATTR2;
337 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
338 mp->m_flags &= ~XFS_MOUNT_ATTR2;
339 mp->m_flags |= XFS_MOUNT_NOATTR2;
340 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
341 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
342 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
343 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
344 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
345 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
346 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
347 !strcmp(this_char, MNTOPT_UQUOTA) ||
348 !strcmp(this_char, MNTOPT_USRQUOTA)) {
349 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
350 XFS_UQUOTA_ENFD);
351 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
352 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
354 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
355 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
356 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
357 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
358 XFS_PQUOTA_ENFD);
359 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
360 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
361 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
362 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
363 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
364 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
365 XFS_GQUOTA_ENFD);
366 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
367 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
368 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
369 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
370 xfs_warn(mp,
371 "delaylog is the default now, option is deprecated.");
372 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
373 xfs_warn(mp,
374 "nodelaylog support has been removed, option is deprecated.");
375 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
376 mp->m_flags |= XFS_MOUNT_DISCARD;
377 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
378 mp->m_flags &= ~XFS_MOUNT_DISCARD;
379 } else if (!strcmp(this_char, "ihashsize")) {
380 xfs_warn(mp,
381 "ihashsize no longer used, option is deprecated.");
382 } else if (!strcmp(this_char, "osyncisdsync")) {
383 xfs_warn(mp,
384 "osyncisdsync has no effect, option is deprecated.");
385 } else if (!strcmp(this_char, "osyncisosync")) {
386 xfs_warn(mp,
387 "osyncisosync has no effect, option is deprecated.");
388 } else if (!strcmp(this_char, "irixsgid")) {
389 xfs_warn(mp,
390 "irixsgid is now a sysctl(2) variable, option is deprecated.");
391 } else {
392 xfs_warn(mp, "unknown mount option [%s].", this_char);
393 return EINVAL;
394 }
395 }
396
397 /*
398 * no recovery flag requires a read-only mount
399 */
400 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
401 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
402 xfs_warn(mp, "no-recovery mounts must be read-only.");
403 return EINVAL;
404 }
405
406 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
407 xfs_warn(mp,
408 "sunit and swidth options incompatible with the noalign option");
409 return EINVAL;
410 }
411
412#ifndef CONFIG_XFS_QUOTA
413 if (XFS_IS_QUOTA_RUNNING(mp)) {
414 xfs_warn(mp, "quota support not available in this kernel.");
415 return EINVAL;
416 }
417#endif
418
419 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
420 xfs_warn(mp, "sunit and swidth must be specified together");
421 return EINVAL;
422 }
423
424 if (dsunit && (dswidth % dsunit != 0)) {
425 xfs_warn(mp,
426 "stripe width (%d) must be a multiple of the stripe unit (%d)",
427 dswidth, dsunit);
428 return EINVAL;
429 }
430
431done:
432 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
433 /*
434 * At this point the superblock has not been read
435 * in, therefore we do not know the block size.
436 * Before the mount call ends we will convert
437 * these to FSBs.
438 */
439 mp->m_dalign = dsunit;
440 mp->m_swidth = dswidth;
441 }
442
443 if (mp->m_logbufs != -1 &&
444 mp->m_logbufs != 0 &&
445 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
446 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
447 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
448 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
449 return XFS_ERROR(EINVAL);
450 }
451 if (mp->m_logbsize != -1 &&
452 mp->m_logbsize != 0 &&
453 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
454 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
455 !is_power_of_2(mp->m_logbsize))) {
456 xfs_warn(mp,
457 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
458 mp->m_logbsize);
459 return XFS_ERROR(EINVAL);
460 }
461
462 if (iosizelog) {
463 if (iosizelog > XFS_MAX_IO_LOG ||
464 iosizelog < XFS_MIN_IO_LOG) {
465 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
466 iosizelog, XFS_MIN_IO_LOG,
467 XFS_MAX_IO_LOG);
468 return XFS_ERROR(EINVAL);
469 }
470
471 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
472 mp->m_readio_log = iosizelog;
473 mp->m_writeio_log = iosizelog;
474 }
475
476 return 0;
477}
478
479struct proc_xfs_info {
480 int flag;
481 char *str;
482};
483
484STATIC int
485xfs_showargs(
486 struct xfs_mount *mp,
487 struct seq_file *m)
488{
489 static struct proc_xfs_info xfs_info_set[] = {
490 /* the few simple ones we can get from the mount struct */
491 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
492 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
493 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
494 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
495 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
496 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
497 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
498 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
499 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
500 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
501 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
502 { 0, NULL }
503 };
504 static struct proc_xfs_info xfs_info_unset[] = {
505 /* the few simple ones we can get from the mount struct */
506 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
507 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
508 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
509 { 0, NULL }
510 };
511 struct proc_xfs_info *xfs_infop;
512
513 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
514 if (mp->m_flags & xfs_infop->flag)
515 seq_puts(m, xfs_infop->str);
516 }
517 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
518 if (!(mp->m_flags & xfs_infop->flag))
519 seq_puts(m, xfs_infop->str);
520 }
521
522 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
523 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
524 (int)(1 << mp->m_writeio_log) >> 10);
525
526 if (mp->m_logbufs > 0)
527 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
528 if (mp->m_logbsize > 0)
529 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
530
531 if (mp->m_logname)
532 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
533 if (mp->m_rtname)
534 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
535
536 if (mp->m_dalign > 0)
537 seq_printf(m, "," MNTOPT_SUNIT "=%d",
538 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
539 if (mp->m_swidth > 0)
540 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
541 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
542
543 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
544 seq_puts(m, "," MNTOPT_USRQUOTA);
545 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
546 seq_puts(m, "," MNTOPT_UQUOTANOENF);
547
548 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
549 if (mp->m_qflags & XFS_PQUOTA_ENFD)
550 seq_puts(m, "," MNTOPT_PRJQUOTA);
551 else
552 seq_puts(m, "," MNTOPT_PQUOTANOENF);
553 }
554 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
555 if (mp->m_qflags & XFS_GQUOTA_ENFD)
556 seq_puts(m, "," MNTOPT_GRPQUOTA);
557 else
558 seq_puts(m, "," MNTOPT_GQUOTANOENF);
559 }
560
561 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
562 seq_puts(m, "," MNTOPT_NOQUOTA);
563
564 return 0;
565}
566__uint64_t
567xfs_max_file_offset(
568 unsigned int blockshift)
569{
570 unsigned int pagefactor = 1;
571 unsigned int bitshift = BITS_PER_LONG - 1;
572
573 /* Figure out maximum filesize, on Linux this can depend on
574 * the filesystem blocksize (on 32 bit platforms).
575 * __block_write_begin does this in an [unsigned] long...
576 * page->index << (PAGE_CACHE_SHIFT - bbits)
577 * So, for page sized blocks (4K on 32 bit platforms),
578 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
579 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
580 * but for smaller blocksizes it is less (bbits = log2 bsize).
581 * Note1: get_block_t takes a long (implicit cast from above)
582 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
583 * can optionally convert the [unsigned] long from above into
584 * an [unsigned] long long.
585 */
586
587#if BITS_PER_LONG == 32
588# if defined(CONFIG_LBDAF)
589 ASSERT(sizeof(sector_t) == 8);
590 pagefactor = PAGE_CACHE_SIZE;
591 bitshift = BITS_PER_LONG;
592# else
593 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
594# endif
595#endif
596
597 return (((__uint64_t)pagefactor) << bitshift) - 1;
598}
599
600xfs_agnumber_t
601xfs_set_inode32(struct xfs_mount *mp)
602{
603 xfs_agnumber_t index = 0;
604 xfs_agnumber_t maxagi = 0;
605 xfs_sb_t *sbp = &mp->m_sb;
606 xfs_agnumber_t max_metadata;
607 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0);
608 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino);
609 xfs_perag_t *pag;
610
611 /* Calculate how much should be reserved for inodes to meet
612 * the max inode percentage.
613 */
614 if (mp->m_maxicount) {
615 __uint64_t icount;
616
617 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
618 do_div(icount, 100);
619 icount += sbp->sb_agblocks - 1;
620 do_div(icount, sbp->sb_agblocks);
621 max_metadata = icount;
622 } else {
623 max_metadata = sbp->sb_agcount;
624 }
625
626 for (index = 0; index < sbp->sb_agcount; index++) {
627 ino = XFS_AGINO_TO_INO(mp, index, agino);
628
629 if (ino > XFS_MAXINUMBER_32) {
630 pag = xfs_perag_get(mp, index);
631 pag->pagi_inodeok = 0;
632 pag->pagf_metadata = 0;
633 xfs_perag_put(pag);
634 continue;
635 }
636
637 pag = xfs_perag_get(mp, index);
638 pag->pagi_inodeok = 1;
639 maxagi++;
640 if (index < max_metadata)
641 pag->pagf_metadata = 1;
642 xfs_perag_put(pag);
643 }
644 mp->m_flags |= (XFS_MOUNT_32BITINODES |
645 XFS_MOUNT_SMALL_INUMS);
646
647 return maxagi;
648}
649
650xfs_agnumber_t
651xfs_set_inode64(struct xfs_mount *mp)
652{
653 xfs_agnumber_t index = 0;
654
655 for (index = 0; index < mp->m_sb.sb_agcount; index++) {
656 struct xfs_perag *pag;
657
658 pag = xfs_perag_get(mp, index);
659 pag->pagi_inodeok = 1;
660 pag->pagf_metadata = 0;
661 xfs_perag_put(pag);
662 }
663
664 /* There is no need for lock protection on m_flags,
665 * the rw_semaphore of the VFS superblock is locked
666 * during mount/umount/remount operations, so this is
667 * enough to avoid concurency on the m_flags field
668 */
669 mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
670 XFS_MOUNT_SMALL_INUMS);
671 return index;
672}
673
674STATIC int
675xfs_blkdev_get(
676 xfs_mount_t *mp,
677 const char *name,
678 struct block_device **bdevp)
679{
680 int error = 0;
681
682 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
683 mp);
684 if (IS_ERR(*bdevp)) {
685 error = PTR_ERR(*bdevp);
686 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
687 }
688
689 return -error;
690}
691
692STATIC void
693xfs_blkdev_put(
694 struct block_device *bdev)
695{
696 if (bdev)
697 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
698}
699
700void
701xfs_blkdev_issue_flush(
702 xfs_buftarg_t *buftarg)
703{
704 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
705}
706
707STATIC void
708xfs_close_devices(
709 struct xfs_mount *mp)
710{
711 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
712 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
713 xfs_free_buftarg(mp, mp->m_logdev_targp);
714 xfs_blkdev_put(logdev);
715 }
716 if (mp->m_rtdev_targp) {
717 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
718 xfs_free_buftarg(mp, mp->m_rtdev_targp);
719 xfs_blkdev_put(rtdev);
720 }
721 xfs_free_buftarg(mp, mp->m_ddev_targp);
722}
723
724/*
725 * The file system configurations are:
726 * (1) device (partition) with data and internal log
727 * (2) logical volume with data and log subvolumes.
728 * (3) logical volume with data, log, and realtime subvolumes.
729 *
730 * We only have to handle opening the log and realtime volumes here if
731 * they are present. The data subvolume has already been opened by
732 * get_sb_bdev() and is stored in sb->s_bdev.
733 */
734STATIC int
735xfs_open_devices(
736 struct xfs_mount *mp)
737{
738 struct block_device *ddev = mp->m_super->s_bdev;
739 struct block_device *logdev = NULL, *rtdev = NULL;
740 int error;
741
742 /*
743 * Open real time and log devices - order is important.
744 */
745 if (mp->m_logname) {
746 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
747 if (error)
748 goto out;
749 }
750
751 if (mp->m_rtname) {
752 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
753 if (error)
754 goto out_close_logdev;
755
756 if (rtdev == ddev || rtdev == logdev) {
757 xfs_warn(mp,
758 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
759 error = EINVAL;
760 goto out_close_rtdev;
761 }
762 }
763
764 /*
765 * Setup xfs_mount buffer target pointers
766 */
767 error = ENOMEM;
768 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
769 if (!mp->m_ddev_targp)
770 goto out_close_rtdev;
771
772 if (rtdev) {
773 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
774 mp->m_fsname);
775 if (!mp->m_rtdev_targp)
776 goto out_free_ddev_targ;
777 }
778
779 if (logdev && logdev != ddev) {
780 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
781 mp->m_fsname);
782 if (!mp->m_logdev_targp)
783 goto out_free_rtdev_targ;
784 } else {
785 mp->m_logdev_targp = mp->m_ddev_targp;
786 }
787
788 return 0;
789
790 out_free_rtdev_targ:
791 if (mp->m_rtdev_targp)
792 xfs_free_buftarg(mp, mp->m_rtdev_targp);
793 out_free_ddev_targ:
794 xfs_free_buftarg(mp, mp->m_ddev_targp);
795 out_close_rtdev:
796 if (rtdev)
797 xfs_blkdev_put(rtdev);
798 out_close_logdev:
799 if (logdev && logdev != ddev)
800 xfs_blkdev_put(logdev);
801 out:
802 return error;
803}
804
805/*
806 * Setup xfs_mount buffer target pointers based on superblock
807 */
808STATIC int
809xfs_setup_devices(
810 struct xfs_mount *mp)
811{
812 int error;
813
814 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
815 mp->m_sb.sb_sectsize);
816 if (error)
817 return error;
818
819 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
820 unsigned int log_sector_size = BBSIZE;
821
822 if (xfs_sb_version_hassector(&mp->m_sb))
823 log_sector_size = mp->m_sb.sb_logsectsize;
824 error = xfs_setsize_buftarg(mp->m_logdev_targp,
825 mp->m_sb.sb_blocksize,
826 log_sector_size);
827 if (error)
828 return error;
829 }
830 if (mp->m_rtdev_targp) {
831 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
832 mp->m_sb.sb_blocksize,
833 mp->m_sb.sb_sectsize);
834 if (error)
835 return error;
836 }
837
838 return 0;
839}
840
841STATIC int
842xfs_init_mount_workqueues(
843 struct xfs_mount *mp)
844{
845 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
846 WQ_MEM_RECLAIM, 0, mp->m_fsname);
847 if (!mp->m_data_workqueue)
848 goto out;
849
850 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
851 WQ_MEM_RECLAIM, 0, mp->m_fsname);
852 if (!mp->m_unwritten_workqueue)
853 goto out_destroy_data_iodone_queue;
854
855 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
856 WQ_MEM_RECLAIM, 0, mp->m_fsname);
857 if (!mp->m_cil_workqueue)
858 goto out_destroy_unwritten;
859
860 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
861 0, 0, mp->m_fsname);
862 if (!mp->m_reclaim_workqueue)
863 goto out_destroy_cil;
864
865 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
866 0, 0, mp->m_fsname);
867 if (!mp->m_log_workqueue)
868 goto out_destroy_reclaim;
869
870 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
871 0, 0, mp->m_fsname);
872 if (!mp->m_eofblocks_workqueue)
873 goto out_destroy_log;
874
875 return 0;
876
877out_destroy_log:
878 destroy_workqueue(mp->m_log_workqueue);
879out_destroy_reclaim:
880 destroy_workqueue(mp->m_reclaim_workqueue);
881out_destroy_cil:
882 destroy_workqueue(mp->m_cil_workqueue);
883out_destroy_unwritten:
884 destroy_workqueue(mp->m_unwritten_workqueue);
885out_destroy_data_iodone_queue:
886 destroy_workqueue(mp->m_data_workqueue);
887out:
888 return -ENOMEM;
889}
890
891STATIC void
892xfs_destroy_mount_workqueues(
893 struct xfs_mount *mp)
894{
895 destroy_workqueue(mp->m_eofblocks_workqueue);
896 destroy_workqueue(mp->m_log_workqueue);
897 destroy_workqueue(mp->m_reclaim_workqueue);
898 destroy_workqueue(mp->m_cil_workqueue);
899 destroy_workqueue(mp->m_data_workqueue);
900 destroy_workqueue(mp->m_unwritten_workqueue);
901}
902
903/*
904 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
905 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
906 * for IO to complete so that we effectively throttle multiple callers to the
907 * rate at which IO is completing.
908 */
909void
910xfs_flush_inodes(
911 struct xfs_mount *mp)
912{
913 struct super_block *sb = mp->m_super;
914
915 if (down_read_trylock(&sb->s_umount)) {
916 sync_inodes_sb(sb);
917 up_read(&sb->s_umount);
918 }
919}
920
921/* Catch misguided souls that try to use this interface on XFS */
922STATIC struct inode *
923xfs_fs_alloc_inode(
924 struct super_block *sb)
925{
926 BUG();
927 return NULL;
928}
929
930/*
931 * Now that the generic code is guaranteed not to be accessing
932 * the linux inode, we can reclaim the inode.
933 */
934STATIC void
935xfs_fs_destroy_inode(
936 struct inode *inode)
937{
938 struct xfs_inode *ip = XFS_I(inode);
939
940 trace_xfs_destroy_inode(ip);
941
942 XFS_STATS_INC(vn_reclaim);
943
944 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
945
946 /*
947 * We should never get here with one of the reclaim flags already set.
948 */
949 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
950 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
951
952 /*
953 * We always use background reclaim here because even if the
954 * inode is clean, it still may be under IO and hence we have
955 * to take the flush lock. The background reclaim path handles
956 * this more efficiently than we can here, so simply let background
957 * reclaim tear down all inodes.
958 */
959 xfs_inode_set_reclaim_tag(ip);
960}
961
962/*
963 * Slab object creation initialisation for the XFS inode.
964 * This covers only the idempotent fields in the XFS inode;
965 * all other fields need to be initialised on allocation
966 * from the slab. This avoids the need to repeatedly initialise
967 * fields in the xfs inode that left in the initialise state
968 * when freeing the inode.
969 */
970STATIC void
971xfs_fs_inode_init_once(
972 void *inode)
973{
974 struct xfs_inode *ip = inode;
975
976 memset(ip, 0, sizeof(struct xfs_inode));
977
978 /* vfs inode */
979 inode_init_once(VFS_I(ip));
980
981 /* xfs inode */
982 atomic_set(&ip->i_pincount, 0);
983 spin_lock_init(&ip->i_flags_lock);
984
985 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
986 "xfsino", ip->i_ino);
987}
988
989STATIC void
990xfs_fs_evict_inode(
991 struct inode *inode)
992{
993 xfs_inode_t *ip = XFS_I(inode);
994
995 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
996
997 trace_xfs_evict_inode(ip);
998
999 truncate_inode_pages_final(&inode->i_data);
1000 clear_inode(inode);
1001 XFS_STATS_INC(vn_rele);
1002 XFS_STATS_INC(vn_remove);
1003 XFS_STATS_DEC(vn_active);
1004
1005 xfs_inactive(ip);
1006}
1007
1008/*
1009 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1010 * serialised against cache hits here via the inode->i_lock and igrab() in
1011 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1012 * racing with us, and it avoids needing to grab a spinlock here for every inode
1013 * we drop the final reference on.
1014 */
1015STATIC int
1016xfs_fs_drop_inode(
1017 struct inode *inode)
1018{
1019 struct xfs_inode *ip = XFS_I(inode);
1020
1021 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1022}
1023
1024STATIC void
1025xfs_free_fsname(
1026 struct xfs_mount *mp)
1027{
1028 kfree(mp->m_fsname);
1029 kfree(mp->m_rtname);
1030 kfree(mp->m_logname);
1031}
1032
1033STATIC void
1034xfs_fs_put_super(
1035 struct super_block *sb)
1036{
1037 struct xfs_mount *mp = XFS_M(sb);
1038
1039 xfs_filestream_unmount(mp);
1040 xfs_unmountfs(mp);
1041
1042 xfs_freesb(mp);
1043 xfs_icsb_destroy_counters(mp);
1044 xfs_destroy_mount_workqueues(mp);
1045 xfs_close_devices(mp);
1046 xfs_free_fsname(mp);
1047 kfree(mp);
1048}
1049
1050STATIC int
1051xfs_fs_sync_fs(
1052 struct super_block *sb,
1053 int wait)
1054{
1055 struct xfs_mount *mp = XFS_M(sb);
1056
1057 /*
1058 * Doing anything during the async pass would be counterproductive.
1059 */
1060 if (!wait)
1061 return 0;
1062
1063 xfs_log_force(mp, XFS_LOG_SYNC);
1064 if (laptop_mode) {
1065 /*
1066 * The disk must be active because we're syncing.
1067 * We schedule log work now (now that the disk is
1068 * active) instead of later (when it might not be).
1069 */
1070 flush_delayed_work(&mp->m_log->l_work);
1071 }
1072
1073 return 0;
1074}
1075
1076STATIC int
1077xfs_fs_statfs(
1078 struct dentry *dentry,
1079 struct kstatfs *statp)
1080{
1081 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1082 xfs_sb_t *sbp = &mp->m_sb;
1083 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1084 __uint64_t fakeinos, id;
1085 xfs_extlen_t lsize;
1086 __int64_t ffree;
1087
1088 statp->f_type = XFS_SB_MAGIC;
1089 statp->f_namelen = MAXNAMELEN - 1;
1090
1091 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1092 statp->f_fsid.val[0] = (u32)id;
1093 statp->f_fsid.val[1] = (u32)(id >> 32);
1094
1095 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1096
1097 spin_lock(&mp->m_sb_lock);
1098 statp->f_bsize = sbp->sb_blocksize;
1099 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1100 statp->f_blocks = sbp->sb_dblocks - lsize;
1101 statp->f_bfree = statp->f_bavail =
1102 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1103 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1104 statp->f_files =
1105 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1106 if (mp->m_maxicount)
1107 statp->f_files = min_t(typeof(statp->f_files),
1108 statp->f_files,
1109 mp->m_maxicount);
1110
1111 /* make sure statp->f_ffree does not underflow */
1112 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1113 statp->f_ffree = max_t(__int64_t, ffree, 0);
1114
1115 spin_unlock(&mp->m_sb_lock);
1116
1117 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1118 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1119 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1120 xfs_qm_statvfs(ip, statp);
1121 return 0;
1122}
1123
1124STATIC void
1125xfs_save_resvblks(struct xfs_mount *mp)
1126{
1127 __uint64_t resblks = 0;
1128
1129 mp->m_resblks_save = mp->m_resblks;
1130 xfs_reserve_blocks(mp, &resblks, NULL);
1131}
1132
1133STATIC void
1134xfs_restore_resvblks(struct xfs_mount *mp)
1135{
1136 __uint64_t resblks;
1137
1138 if (mp->m_resblks_save) {
1139 resblks = mp->m_resblks_save;
1140 mp->m_resblks_save = 0;
1141 } else
1142 resblks = xfs_default_resblks(mp);
1143
1144 xfs_reserve_blocks(mp, &resblks, NULL);
1145}
1146
1147/*
1148 * Trigger writeback of all the dirty metadata in the file system.
1149 *
1150 * This ensures that the metadata is written to their location on disk rather
1151 * than just existing in transactions in the log. This means after a quiesce
1152 * there is no log replay required to write the inodes to disk - this is the
1153 * primary difference between a sync and a quiesce.
1154 *
1155 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1156 * it is started again when appropriate.
1157 */
1158static void
1159xfs_quiesce_attr(
1160 struct xfs_mount *mp)
1161{
1162 int error = 0;
1163
1164 /* wait for all modifications to complete */
1165 while (atomic_read(&mp->m_active_trans) > 0)
1166 delay(100);
1167
1168 /* force the log to unpin objects from the now complete transactions */
1169 xfs_log_force(mp, XFS_LOG_SYNC);
1170
1171 /* reclaim inodes to do any IO before the freeze completes */
1172 xfs_reclaim_inodes(mp, 0);
1173 xfs_reclaim_inodes(mp, SYNC_WAIT);
1174
1175 /* Push the superblock and write an unmount record */
1176 error = xfs_log_sbcount(mp);
1177 if (error)
1178 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1179 "Frozen image may not be consistent.");
1180 /*
1181 * Just warn here till VFS can correctly support
1182 * read-only remount without racing.
1183 */
1184 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1185
1186 xfs_log_quiesce(mp);
1187}
1188
1189STATIC int
1190xfs_fs_remount(
1191 struct super_block *sb,
1192 int *flags,
1193 char *options)
1194{
1195 struct xfs_mount *mp = XFS_M(sb);
1196 substring_t args[MAX_OPT_ARGS];
1197 char *p;
1198 int error;
1199
1200 sync_filesystem(sb);
1201 while ((p = strsep(&options, ",")) != NULL) {
1202 int token;
1203
1204 if (!*p)
1205 continue;
1206
1207 token = match_token(p, tokens, args);
1208 switch (token) {
1209 case Opt_barrier:
1210 mp->m_flags |= XFS_MOUNT_BARRIER;
1211 break;
1212 case Opt_nobarrier:
1213 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1214 break;
1215 case Opt_inode64:
1216 mp->m_maxagi = xfs_set_inode64(mp);
1217 break;
1218 case Opt_inode32:
1219 mp->m_maxagi = xfs_set_inode32(mp);
1220 break;
1221 default:
1222 /*
1223 * Logically we would return an error here to prevent
1224 * users from believing they might have changed
1225 * mount options using remount which can't be changed.
1226 *
1227 * But unfortunately mount(8) adds all options from
1228 * mtab and fstab to the mount arguments in some cases
1229 * so we can't blindly reject options, but have to
1230 * check for each specified option if it actually
1231 * differs from the currently set option and only
1232 * reject it if that's the case.
1233 *
1234 * Until that is implemented we return success for
1235 * every remount request, and silently ignore all
1236 * options that we can't actually change.
1237 */
1238#if 0
1239 xfs_info(mp,
1240 "mount option \"%s\" not supported for remount", p);
1241 return -EINVAL;
1242#else
1243 break;
1244#endif
1245 }
1246 }
1247
1248 /* ro -> rw */
1249 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1250 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1251
1252 /*
1253 * If this is the first remount to writeable state we
1254 * might have some superblock changes to update.
1255 */
1256 if (mp->m_update_flags) {
1257 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1258 if (error) {
1259 xfs_warn(mp, "failed to write sb changes");
1260 return error;
1261 }
1262 mp->m_update_flags = 0;
1263 }
1264
1265 /*
1266 * Fill out the reserve pool if it is empty. Use the stashed
1267 * value if it is non-zero, otherwise go with the default.
1268 */
1269 xfs_restore_resvblks(mp);
1270 xfs_log_work_queue(mp);
1271 }
1272
1273 /* rw -> ro */
1274 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1275 /*
1276 * Before we sync the metadata, we need to free up the reserve
1277 * block pool so that the used block count in the superblock on
1278 * disk is correct at the end of the remount. Stash the current
1279 * reserve pool size so that if we get remounted rw, we can
1280 * return it to the same size.
1281 */
1282 xfs_save_resvblks(mp);
1283 xfs_quiesce_attr(mp);
1284 mp->m_flags |= XFS_MOUNT_RDONLY;
1285 }
1286
1287 return 0;
1288}
1289
1290/*
1291 * Second stage of a freeze. The data is already frozen so we only
1292 * need to take care of the metadata. Once that's done write a dummy
1293 * record to dirty the log in case of a crash while frozen.
1294 */
1295STATIC int
1296xfs_fs_freeze(
1297 struct super_block *sb)
1298{
1299 struct xfs_mount *mp = XFS_M(sb);
1300
1301 xfs_save_resvblks(mp);
1302 xfs_quiesce_attr(mp);
1303 return -xfs_fs_log_dummy(mp);
1304}
1305
1306STATIC int
1307xfs_fs_unfreeze(
1308 struct super_block *sb)
1309{
1310 struct xfs_mount *mp = XFS_M(sb);
1311
1312 xfs_restore_resvblks(mp);
1313 xfs_log_work_queue(mp);
1314 return 0;
1315}
1316
1317STATIC int
1318xfs_fs_show_options(
1319 struct seq_file *m,
1320 struct dentry *root)
1321{
1322 return -xfs_showargs(XFS_M(root->d_sb), m);
1323}
1324
1325/*
1326 * This function fills in xfs_mount_t fields based on mount args.
1327 * Note: the superblock _has_ now been read in.
1328 */
1329STATIC int
1330xfs_finish_flags(
1331 struct xfs_mount *mp)
1332{
1333 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1334
1335 /* Fail a mount where the logbuf is smaller than the log stripe */
1336 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1337 if (mp->m_logbsize <= 0 &&
1338 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1339 mp->m_logbsize = mp->m_sb.sb_logsunit;
1340 } else if (mp->m_logbsize > 0 &&
1341 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1342 xfs_warn(mp,
1343 "logbuf size must be greater than or equal to log stripe size");
1344 return XFS_ERROR(EINVAL);
1345 }
1346 } else {
1347 /* Fail a mount if the logbuf is larger than 32K */
1348 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1349 xfs_warn(mp,
1350 "logbuf size for version 1 logs must be 16K or 32K");
1351 return XFS_ERROR(EINVAL);
1352 }
1353 }
1354
1355 /*
1356 * V5 filesystems always use attr2 format for attributes.
1357 */
1358 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1359 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1360 xfs_warn(mp,
1361"Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1362 MNTOPT_NOATTR2, MNTOPT_ATTR2);
1363 return XFS_ERROR(EINVAL);
1364 }
1365
1366 /*
1367 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1368 * told by noattr2 to turn it off
1369 */
1370 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1371 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1372 mp->m_flags |= XFS_MOUNT_ATTR2;
1373
1374 /*
1375 * prohibit r/w mounts of read-only filesystems
1376 */
1377 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1378 xfs_warn(mp,
1379 "cannot mount a read-only filesystem as read-write");
1380 return XFS_ERROR(EROFS);
1381 }
1382
1383 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1384 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1385 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1386 xfs_warn(mp,
1387 "Super block does not support project and group quota together");
1388 return XFS_ERROR(EINVAL);
1389 }
1390
1391 return 0;
1392}
1393
1394STATIC int
1395xfs_fs_fill_super(
1396 struct super_block *sb,
1397 void *data,
1398 int silent)
1399{
1400 struct inode *root;
1401 struct xfs_mount *mp = NULL;
1402 int flags = 0, error = ENOMEM;
1403
1404 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1405 if (!mp)
1406 goto out;
1407
1408 spin_lock_init(&mp->m_sb_lock);
1409 mutex_init(&mp->m_growlock);
1410 atomic_set(&mp->m_active_trans, 0);
1411 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1412 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1413
1414 mp->m_super = sb;
1415 sb->s_fs_info = mp;
1416
1417 error = xfs_parseargs(mp, (char *)data);
1418 if (error)
1419 goto out_free_fsname;
1420
1421 sb_min_blocksize(sb, BBSIZE);
1422 sb->s_xattr = xfs_xattr_handlers;
1423 sb->s_export_op = &xfs_export_operations;
1424#ifdef CONFIG_XFS_QUOTA
1425 sb->s_qcop = &xfs_quotactl_operations;
1426#endif
1427 sb->s_op = &xfs_super_operations;
1428
1429 if (silent)
1430 flags |= XFS_MFSI_QUIET;
1431
1432 error = xfs_open_devices(mp);
1433 if (error)
1434 goto out_free_fsname;
1435
1436 error = -xfs_init_mount_workqueues(mp);
1437 if (error)
1438 goto out_close_devices;
1439
1440 error = -xfs_icsb_init_counters(mp);
1441 if (error)
1442 goto out_destroy_workqueues;
1443
1444 error = xfs_readsb(mp, flags);
1445 if (error)
1446 goto out_destroy_counters;
1447
1448 error = xfs_finish_flags(mp);
1449 if (error)
1450 goto out_free_sb;
1451
1452 error = xfs_setup_devices(mp);
1453 if (error)
1454 goto out_free_sb;
1455
1456 error = xfs_filestream_mount(mp);
1457 if (error)
1458 goto out_free_sb;
1459
1460 /*
1461 * we must configure the block size in the superblock before we run the
1462 * full mount process as the mount process can lookup and cache inodes.
1463 */
1464 sb->s_magic = XFS_SB_MAGIC;
1465 sb->s_blocksize = mp->m_sb.sb_blocksize;
1466 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1467 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1468 sb->s_max_links = XFS_MAXLINK;
1469 sb->s_time_gran = 1;
1470 set_posix_acl_flag(sb);
1471
1472 /* version 5 superblocks support inode version counters. */
1473 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1474 sb->s_flags |= MS_I_VERSION;
1475
1476 error = xfs_mountfs(mp);
1477 if (error)
1478 goto out_filestream_unmount;
1479
1480 root = igrab(VFS_I(mp->m_rootip));
1481 if (!root) {
1482 error = ENOENT;
1483 goto out_unmount;
1484 }
1485 sb->s_root = d_make_root(root);
1486 if (!sb->s_root) {
1487 error = ENOMEM;
1488 goto out_unmount;
1489 }
1490
1491 return 0;
1492
1493 out_filestream_unmount:
1494 xfs_filestream_unmount(mp);
1495 out_free_sb:
1496 xfs_freesb(mp);
1497 out_destroy_counters:
1498 xfs_icsb_destroy_counters(mp);
1499out_destroy_workqueues:
1500 xfs_destroy_mount_workqueues(mp);
1501 out_close_devices:
1502 xfs_close_devices(mp);
1503 out_free_fsname:
1504 xfs_free_fsname(mp);
1505 kfree(mp);
1506 out:
1507 return -error;
1508
1509 out_unmount:
1510 xfs_filestream_unmount(mp);
1511 xfs_unmountfs(mp);
1512 goto out_free_sb;
1513}
1514
1515STATIC struct dentry *
1516xfs_fs_mount(
1517 struct file_system_type *fs_type,
1518 int flags,
1519 const char *dev_name,
1520 void *data)
1521{
1522 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1523}
1524
1525static long
1526xfs_fs_nr_cached_objects(
1527 struct super_block *sb,
1528 int nid)
1529{
1530 return xfs_reclaim_inodes_count(XFS_M(sb));
1531}
1532
1533static long
1534xfs_fs_free_cached_objects(
1535 struct super_block *sb,
1536 long nr_to_scan,
1537 int nid)
1538{
1539 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1540}
1541
1542static const struct super_operations xfs_super_operations = {
1543 .alloc_inode = xfs_fs_alloc_inode,
1544 .destroy_inode = xfs_fs_destroy_inode,
1545 .evict_inode = xfs_fs_evict_inode,
1546 .drop_inode = xfs_fs_drop_inode,
1547 .put_super = xfs_fs_put_super,
1548 .sync_fs = xfs_fs_sync_fs,
1549 .freeze_fs = xfs_fs_freeze,
1550 .unfreeze_fs = xfs_fs_unfreeze,
1551 .statfs = xfs_fs_statfs,
1552 .remount_fs = xfs_fs_remount,
1553 .show_options = xfs_fs_show_options,
1554 .nr_cached_objects = xfs_fs_nr_cached_objects,
1555 .free_cached_objects = xfs_fs_free_cached_objects,
1556};
1557
1558static struct file_system_type xfs_fs_type = {
1559 .owner = THIS_MODULE,
1560 .name = "xfs",
1561 .mount = xfs_fs_mount,
1562 .kill_sb = kill_block_super,
1563 .fs_flags = FS_REQUIRES_DEV,
1564};
1565MODULE_ALIAS_FS("xfs");
1566
1567STATIC int __init
1568xfs_init_zones(void)
1569{
1570
1571 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1572 if (!xfs_ioend_zone)
1573 goto out;
1574
1575 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1576 xfs_ioend_zone);
1577 if (!xfs_ioend_pool)
1578 goto out_destroy_ioend_zone;
1579
1580 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1581 "xfs_log_ticket");
1582 if (!xfs_log_ticket_zone)
1583 goto out_destroy_ioend_pool;
1584
1585 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1586 "xfs_bmap_free_item");
1587 if (!xfs_bmap_free_item_zone)
1588 goto out_destroy_log_ticket_zone;
1589
1590 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1591 "xfs_btree_cur");
1592 if (!xfs_btree_cur_zone)
1593 goto out_destroy_bmap_free_item_zone;
1594
1595 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1596 "xfs_da_state");
1597 if (!xfs_da_state_zone)
1598 goto out_destroy_btree_cur_zone;
1599
1600 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1601 if (!xfs_ifork_zone)
1602 goto out_destroy_da_state_zone;
1603
1604 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1605 if (!xfs_trans_zone)
1606 goto out_destroy_ifork_zone;
1607
1608 xfs_log_item_desc_zone =
1609 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1610 "xfs_log_item_desc");
1611 if (!xfs_log_item_desc_zone)
1612 goto out_destroy_trans_zone;
1613
1614 /*
1615 * The size of the zone allocated buf log item is the maximum
1616 * size possible under XFS. This wastes a little bit of memory,
1617 * but it is much faster.
1618 */
1619 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1620 "xfs_buf_item");
1621 if (!xfs_buf_item_zone)
1622 goto out_destroy_log_item_desc_zone;
1623
1624 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1625 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1626 sizeof(xfs_extent_t))), "xfs_efd_item");
1627 if (!xfs_efd_zone)
1628 goto out_destroy_buf_item_zone;
1629
1630 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1631 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1632 sizeof(xfs_extent_t))), "xfs_efi_item");
1633 if (!xfs_efi_zone)
1634 goto out_destroy_efd_zone;
1635
1636 xfs_inode_zone =
1637 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1638 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1639 xfs_fs_inode_init_once);
1640 if (!xfs_inode_zone)
1641 goto out_destroy_efi_zone;
1642
1643 xfs_ili_zone =
1644 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1645 KM_ZONE_SPREAD, NULL);
1646 if (!xfs_ili_zone)
1647 goto out_destroy_inode_zone;
1648 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1649 "xfs_icr");
1650 if (!xfs_icreate_zone)
1651 goto out_destroy_ili_zone;
1652
1653 return 0;
1654
1655 out_destroy_ili_zone:
1656 kmem_zone_destroy(xfs_ili_zone);
1657 out_destroy_inode_zone:
1658 kmem_zone_destroy(xfs_inode_zone);
1659 out_destroy_efi_zone:
1660 kmem_zone_destroy(xfs_efi_zone);
1661 out_destroy_efd_zone:
1662 kmem_zone_destroy(xfs_efd_zone);
1663 out_destroy_buf_item_zone:
1664 kmem_zone_destroy(xfs_buf_item_zone);
1665 out_destroy_log_item_desc_zone:
1666 kmem_zone_destroy(xfs_log_item_desc_zone);
1667 out_destroy_trans_zone:
1668 kmem_zone_destroy(xfs_trans_zone);
1669 out_destroy_ifork_zone:
1670 kmem_zone_destroy(xfs_ifork_zone);
1671 out_destroy_da_state_zone:
1672 kmem_zone_destroy(xfs_da_state_zone);
1673 out_destroy_btree_cur_zone:
1674 kmem_zone_destroy(xfs_btree_cur_zone);
1675 out_destroy_bmap_free_item_zone:
1676 kmem_zone_destroy(xfs_bmap_free_item_zone);
1677 out_destroy_log_ticket_zone:
1678 kmem_zone_destroy(xfs_log_ticket_zone);
1679 out_destroy_ioend_pool:
1680 mempool_destroy(xfs_ioend_pool);
1681 out_destroy_ioend_zone:
1682 kmem_zone_destroy(xfs_ioend_zone);
1683 out:
1684 return -ENOMEM;
1685}
1686
1687STATIC void
1688xfs_destroy_zones(void)
1689{
1690 /*
1691 * Make sure all delayed rcu free are flushed before we
1692 * destroy caches.
1693 */
1694 rcu_barrier();
1695 kmem_zone_destroy(xfs_icreate_zone);
1696 kmem_zone_destroy(xfs_ili_zone);
1697 kmem_zone_destroy(xfs_inode_zone);
1698 kmem_zone_destroy(xfs_efi_zone);
1699 kmem_zone_destroy(xfs_efd_zone);
1700 kmem_zone_destroy(xfs_buf_item_zone);
1701 kmem_zone_destroy(xfs_log_item_desc_zone);
1702 kmem_zone_destroy(xfs_trans_zone);
1703 kmem_zone_destroy(xfs_ifork_zone);
1704 kmem_zone_destroy(xfs_da_state_zone);
1705 kmem_zone_destroy(xfs_btree_cur_zone);
1706 kmem_zone_destroy(xfs_bmap_free_item_zone);
1707 kmem_zone_destroy(xfs_log_ticket_zone);
1708 mempool_destroy(xfs_ioend_pool);
1709 kmem_zone_destroy(xfs_ioend_zone);
1710
1711}
1712
1713STATIC int __init
1714xfs_init_workqueues(void)
1715{
1716 /*
1717 * The allocation workqueue can be used in memory reclaim situations
1718 * (writepage path), and parallelism is only limited by the number of
1719 * AGs in all the filesystems mounted. Hence use the default large
1720 * max_active value for this workqueue.
1721 */
1722 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
1723 if (!xfs_alloc_wq)
1724 return -ENOMEM;
1725
1726 return 0;
1727}
1728
1729STATIC void
1730xfs_destroy_workqueues(void)
1731{
1732 destroy_workqueue(xfs_alloc_wq);
1733}
1734
1735STATIC int __init
1736init_xfs_fs(void)
1737{
1738 int error;
1739
1740 printk(KERN_INFO XFS_VERSION_STRING " with "
1741 XFS_BUILD_OPTIONS " enabled\n");
1742
1743 xfs_dir_startup();
1744
1745 error = xfs_init_zones();
1746 if (error)
1747 goto out;
1748
1749 error = xfs_init_workqueues();
1750 if (error)
1751 goto out_destroy_zones;
1752
1753 error = xfs_mru_cache_init();
1754 if (error)
1755 goto out_destroy_wq;
1756
1757 error = xfs_filestream_init();
1758 if (error)
1759 goto out_mru_cache_uninit;
1760
1761 error = xfs_buf_init();
1762 if (error)
1763 goto out_filestream_uninit;
1764
1765 error = xfs_init_procfs();
1766 if (error)
1767 goto out_buf_terminate;
1768
1769 error = xfs_sysctl_register();
1770 if (error)
1771 goto out_cleanup_procfs;
1772
1773 error = xfs_qm_init();
1774 if (error)
1775 goto out_sysctl_unregister;
1776
1777 error = register_filesystem(&xfs_fs_type);
1778 if (error)
1779 goto out_qm_exit;
1780 return 0;
1781
1782 out_qm_exit:
1783 xfs_qm_exit();
1784 out_sysctl_unregister:
1785 xfs_sysctl_unregister();
1786 out_cleanup_procfs:
1787 xfs_cleanup_procfs();
1788 out_buf_terminate:
1789 xfs_buf_terminate();
1790 out_filestream_uninit:
1791 xfs_filestream_uninit();
1792 out_mru_cache_uninit:
1793 xfs_mru_cache_uninit();
1794 out_destroy_wq:
1795 xfs_destroy_workqueues();
1796 out_destroy_zones:
1797 xfs_destroy_zones();
1798 out:
1799 return error;
1800}
1801
1802STATIC void __exit
1803exit_xfs_fs(void)
1804{
1805 xfs_qm_exit();
1806 unregister_filesystem(&xfs_fs_type);
1807 xfs_sysctl_unregister();
1808 xfs_cleanup_procfs();
1809 xfs_buf_terminate();
1810 xfs_filestream_uninit();
1811 xfs_mru_cache_uninit();
1812 xfs_destroy_workqueues();
1813 xfs_destroy_zones();
1814}
1815
1816module_init(init_xfs_fs);
1817module_exit(exit_xfs_fs);
1818
1819MODULE_AUTHOR("Silicon Graphics, Inc.");
1820MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1821MODULE_LICENSE("GPL");
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
41#include <linux/magic.h>
42#include <linux/fs_context.h>
43#include <linux/fs_parser.h>
44
45static const struct super_operations xfs_super_operations;
46
47static struct kset *xfs_kset; /* top-level xfs sysfs dir */
48#ifdef DEBUG
49static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
50#endif
51
52enum xfs_dax_mode {
53 XFS_DAX_INODE = 0,
54 XFS_DAX_ALWAYS = 1,
55 XFS_DAX_NEVER = 2,
56};
57
58static void
59xfs_mount_set_dax_mode(
60 struct xfs_mount *mp,
61 enum xfs_dax_mode mode)
62{
63 switch (mode) {
64 case XFS_DAX_INODE:
65 mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER);
66 break;
67 case XFS_DAX_ALWAYS:
68 mp->m_flags |= XFS_MOUNT_DAX_ALWAYS;
69 mp->m_flags &= ~XFS_MOUNT_DAX_NEVER;
70 break;
71 case XFS_DAX_NEVER:
72 mp->m_flags |= XFS_MOUNT_DAX_NEVER;
73 mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS;
74 break;
75 }
76}
77
78static const struct constant_table dax_param_enums[] = {
79 {"inode", XFS_DAX_INODE },
80 {"always", XFS_DAX_ALWAYS },
81 {"never", XFS_DAX_NEVER },
82 {}
83};
84
85/*
86 * Table driven mount option parser.
87 */
88enum {
89 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
90 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
91 Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
92 Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
93 Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
94 Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
95 Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
96 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
97 Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,
98};
99
100static const struct fs_parameter_spec xfs_fs_parameters[] = {
101 fsparam_u32("logbufs", Opt_logbufs),
102 fsparam_string("logbsize", Opt_logbsize),
103 fsparam_string("logdev", Opt_logdev),
104 fsparam_string("rtdev", Opt_rtdev),
105 fsparam_flag("wsync", Opt_wsync),
106 fsparam_flag("noalign", Opt_noalign),
107 fsparam_flag("swalloc", Opt_swalloc),
108 fsparam_u32("sunit", Opt_sunit),
109 fsparam_u32("swidth", Opt_swidth),
110 fsparam_flag("nouuid", Opt_nouuid),
111 fsparam_flag("grpid", Opt_grpid),
112 fsparam_flag("nogrpid", Opt_nogrpid),
113 fsparam_flag("bsdgroups", Opt_bsdgroups),
114 fsparam_flag("sysvgroups", Opt_sysvgroups),
115 fsparam_string("allocsize", Opt_allocsize),
116 fsparam_flag("norecovery", Opt_norecovery),
117 fsparam_flag("inode64", Opt_inode64),
118 fsparam_flag("inode32", Opt_inode32),
119 fsparam_flag("ikeep", Opt_ikeep),
120 fsparam_flag("noikeep", Opt_noikeep),
121 fsparam_flag("largeio", Opt_largeio),
122 fsparam_flag("nolargeio", Opt_nolargeio),
123 fsparam_flag("attr2", Opt_attr2),
124 fsparam_flag("noattr2", Opt_noattr2),
125 fsparam_flag("filestreams", Opt_filestreams),
126 fsparam_flag("quota", Opt_quota),
127 fsparam_flag("noquota", Opt_noquota),
128 fsparam_flag("usrquota", Opt_usrquota),
129 fsparam_flag("grpquota", Opt_grpquota),
130 fsparam_flag("prjquota", Opt_prjquota),
131 fsparam_flag("uquota", Opt_uquota),
132 fsparam_flag("gquota", Opt_gquota),
133 fsparam_flag("pquota", Opt_pquota),
134 fsparam_flag("uqnoenforce", Opt_uqnoenforce),
135 fsparam_flag("gqnoenforce", Opt_gqnoenforce),
136 fsparam_flag("pqnoenforce", Opt_pqnoenforce),
137 fsparam_flag("qnoenforce", Opt_qnoenforce),
138 fsparam_flag("discard", Opt_discard),
139 fsparam_flag("nodiscard", Opt_nodiscard),
140 fsparam_flag("dax", Opt_dax),
141 fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
142 {}
143};
144
145struct proc_xfs_info {
146 uint64_t flag;
147 char *str;
148};
149
150static int
151xfs_fs_show_options(
152 struct seq_file *m,
153 struct dentry *root)
154{
155 static struct proc_xfs_info xfs_info_set[] = {
156 /* the few simple ones we can get from the mount struct */
157 { XFS_MOUNT_IKEEP, ",ikeep" },
158 { XFS_MOUNT_WSYNC, ",wsync" },
159 { XFS_MOUNT_NOALIGN, ",noalign" },
160 { XFS_MOUNT_SWALLOC, ",swalloc" },
161 { XFS_MOUNT_NOUUID, ",nouuid" },
162 { XFS_MOUNT_NORECOVERY, ",norecovery" },
163 { XFS_MOUNT_ATTR2, ",attr2" },
164 { XFS_MOUNT_FILESTREAMS, ",filestreams" },
165 { XFS_MOUNT_GRPID, ",grpid" },
166 { XFS_MOUNT_DISCARD, ",discard" },
167 { XFS_MOUNT_LARGEIO, ",largeio" },
168 { XFS_MOUNT_DAX_ALWAYS, ",dax=always" },
169 { XFS_MOUNT_DAX_NEVER, ",dax=never" },
170 { 0, NULL }
171 };
172 struct xfs_mount *mp = XFS_M(root->d_sb);
173 struct proc_xfs_info *xfs_infop;
174
175 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
176 if (mp->m_flags & xfs_infop->flag)
177 seq_puts(m, xfs_infop->str);
178 }
179
180 seq_printf(m, ",inode%d",
181 (mp->m_flags & XFS_MOUNT_SMALL_INUMS) ? 32 : 64);
182
183 if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
184 seq_printf(m, ",allocsize=%dk",
185 (1 << mp->m_allocsize_log) >> 10);
186
187 if (mp->m_logbufs > 0)
188 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
189 if (mp->m_logbsize > 0)
190 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
191
192 if (mp->m_logname)
193 seq_show_option(m, "logdev", mp->m_logname);
194 if (mp->m_rtname)
195 seq_show_option(m, "rtdev", mp->m_rtname);
196
197 if (mp->m_dalign > 0)
198 seq_printf(m, ",sunit=%d",
199 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
200 if (mp->m_swidth > 0)
201 seq_printf(m, ",swidth=%d",
202 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
203
204 if (mp->m_qflags & XFS_UQUOTA_ACCT) {
205 if (mp->m_qflags & XFS_UQUOTA_ENFD)
206 seq_puts(m, ",usrquota");
207 else
208 seq_puts(m, ",uqnoenforce");
209 }
210
211 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
212 if (mp->m_qflags & XFS_PQUOTA_ENFD)
213 seq_puts(m, ",prjquota");
214 else
215 seq_puts(m, ",pqnoenforce");
216 }
217 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
218 if (mp->m_qflags & XFS_GQUOTA_ENFD)
219 seq_puts(m, ",grpquota");
220 else
221 seq_puts(m, ",gqnoenforce");
222 }
223
224 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
225 seq_puts(m, ",noquota");
226
227 return 0;
228}
229
230/*
231 * Set parameters for inode allocation heuristics, taking into account
232 * filesystem size and inode32/inode64 mount options; i.e. specifically
233 * whether or not XFS_MOUNT_SMALL_INUMS is set.
234 *
235 * Inode allocation patterns are altered only if inode32 is requested
236 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
237 * If altered, XFS_MOUNT_32BITINODES is set as well.
238 *
239 * An agcount independent of that in the mount structure is provided
240 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
241 * to the potentially higher ag count.
242 *
243 * Returns the maximum AG index which may contain inodes.
244 */
245xfs_agnumber_t
246xfs_set_inode_alloc(
247 struct xfs_mount *mp,
248 xfs_agnumber_t agcount)
249{
250 xfs_agnumber_t index;
251 xfs_agnumber_t maxagi = 0;
252 xfs_sb_t *sbp = &mp->m_sb;
253 xfs_agnumber_t max_metadata;
254 xfs_agino_t agino;
255 xfs_ino_t ino;
256
257 /*
258 * Calculate how much should be reserved for inodes to meet
259 * the max inode percentage. Used only for inode32.
260 */
261 if (M_IGEO(mp)->maxicount) {
262 uint64_t icount;
263
264 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
265 do_div(icount, 100);
266 icount += sbp->sb_agblocks - 1;
267 do_div(icount, sbp->sb_agblocks);
268 max_metadata = icount;
269 } else {
270 max_metadata = agcount;
271 }
272
273 /* Get the last possible inode in the filesystem */
274 agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
275 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
276
277 /*
278 * If user asked for no more than 32-bit inodes, and the fs is
279 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
280 * the allocator to accommodate the request.
281 */
282 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
283 mp->m_flags |= XFS_MOUNT_32BITINODES;
284 else
285 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
286
287 for (index = 0; index < agcount; index++) {
288 struct xfs_perag *pag;
289
290 ino = XFS_AGINO_TO_INO(mp, index, agino);
291
292 pag = xfs_perag_get(mp, index);
293
294 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
295 if (ino > XFS_MAXINUMBER_32) {
296 pag->pagi_inodeok = 0;
297 pag->pagf_metadata = 0;
298 } else {
299 pag->pagi_inodeok = 1;
300 maxagi++;
301 if (index < max_metadata)
302 pag->pagf_metadata = 1;
303 else
304 pag->pagf_metadata = 0;
305 }
306 } else {
307 pag->pagi_inodeok = 1;
308 pag->pagf_metadata = 0;
309 }
310
311 xfs_perag_put(pag);
312 }
313
314 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
315}
316
317STATIC int
318xfs_blkdev_get(
319 xfs_mount_t *mp,
320 const char *name,
321 struct block_device **bdevp)
322{
323 int error = 0;
324
325 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
326 mp);
327 if (IS_ERR(*bdevp)) {
328 error = PTR_ERR(*bdevp);
329 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
330 }
331
332 return error;
333}
334
335STATIC void
336xfs_blkdev_put(
337 struct block_device *bdev)
338{
339 if (bdev)
340 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
341}
342
343STATIC void
344xfs_close_devices(
345 struct xfs_mount *mp)
346{
347 struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;
348
349 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
350 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
351 struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;
352
353 xfs_free_buftarg(mp->m_logdev_targp);
354 xfs_blkdev_put(logdev);
355 fs_put_dax(dax_logdev);
356 }
357 if (mp->m_rtdev_targp) {
358 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
359 struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;
360
361 xfs_free_buftarg(mp->m_rtdev_targp);
362 xfs_blkdev_put(rtdev);
363 fs_put_dax(dax_rtdev);
364 }
365 xfs_free_buftarg(mp->m_ddev_targp);
366 fs_put_dax(dax_ddev);
367}
368
369/*
370 * The file system configurations are:
371 * (1) device (partition) with data and internal log
372 * (2) logical volume with data and log subvolumes.
373 * (3) logical volume with data, log, and realtime subvolumes.
374 *
375 * We only have to handle opening the log and realtime volumes here if
376 * they are present. The data subvolume has already been opened by
377 * get_sb_bdev() and is stored in sb->s_bdev.
378 */
379STATIC int
380xfs_open_devices(
381 struct xfs_mount *mp)
382{
383 struct block_device *ddev = mp->m_super->s_bdev;
384 struct dax_device *dax_ddev = fs_dax_get_by_bdev(ddev);
385 struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL;
386 struct block_device *logdev = NULL, *rtdev = NULL;
387 int error;
388
389 /*
390 * Open real time and log devices - order is important.
391 */
392 if (mp->m_logname) {
393 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
394 if (error)
395 goto out;
396 dax_logdev = fs_dax_get_by_bdev(logdev);
397 }
398
399 if (mp->m_rtname) {
400 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
401 if (error)
402 goto out_close_logdev;
403
404 if (rtdev == ddev || rtdev == logdev) {
405 xfs_warn(mp,
406 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
407 error = -EINVAL;
408 goto out_close_rtdev;
409 }
410 dax_rtdev = fs_dax_get_by_bdev(rtdev);
411 }
412
413 /*
414 * Setup xfs_mount buffer target pointers
415 */
416 error = -ENOMEM;
417 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);
418 if (!mp->m_ddev_targp)
419 goto out_close_rtdev;
420
421 if (rtdev) {
422 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);
423 if (!mp->m_rtdev_targp)
424 goto out_free_ddev_targ;
425 }
426
427 if (logdev && logdev != ddev) {
428 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev);
429 if (!mp->m_logdev_targp)
430 goto out_free_rtdev_targ;
431 } else {
432 mp->m_logdev_targp = mp->m_ddev_targp;
433 }
434
435 return 0;
436
437 out_free_rtdev_targ:
438 if (mp->m_rtdev_targp)
439 xfs_free_buftarg(mp->m_rtdev_targp);
440 out_free_ddev_targ:
441 xfs_free_buftarg(mp->m_ddev_targp);
442 out_close_rtdev:
443 xfs_blkdev_put(rtdev);
444 fs_put_dax(dax_rtdev);
445 out_close_logdev:
446 if (logdev && logdev != ddev) {
447 xfs_blkdev_put(logdev);
448 fs_put_dax(dax_logdev);
449 }
450 out:
451 fs_put_dax(dax_ddev);
452 return error;
453}
454
455/*
456 * Setup xfs_mount buffer target pointers based on superblock
457 */
458STATIC int
459xfs_setup_devices(
460 struct xfs_mount *mp)
461{
462 int error;
463
464 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
465 if (error)
466 return error;
467
468 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
469 unsigned int log_sector_size = BBSIZE;
470
471 if (xfs_sb_version_hassector(&mp->m_sb))
472 log_sector_size = mp->m_sb.sb_logsectsize;
473 error = xfs_setsize_buftarg(mp->m_logdev_targp,
474 log_sector_size);
475 if (error)
476 return error;
477 }
478 if (mp->m_rtdev_targp) {
479 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
480 mp->m_sb.sb_sectsize);
481 if (error)
482 return error;
483 }
484
485 return 0;
486}
487
488STATIC int
489xfs_init_mount_workqueues(
490 struct xfs_mount *mp)
491{
492 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
493 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
494 1, mp->m_super->s_id);
495 if (!mp->m_buf_workqueue)
496 goto out;
497
498 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
499 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
500 0, mp->m_super->s_id);
501 if (!mp->m_unwritten_workqueue)
502 goto out_destroy_buf;
503
504 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
505 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND),
506 0, mp->m_super->s_id);
507 if (!mp->m_cil_workqueue)
508 goto out_destroy_unwritten;
509
510 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
511 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
512 0, mp->m_super->s_id);
513 if (!mp->m_reclaim_workqueue)
514 goto out_destroy_cil;
515
516 mp->m_gc_workqueue = alloc_workqueue("xfs-gc/%s",
517 WQ_SYSFS | WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM,
518 0, mp->m_super->s_id);
519 if (!mp->m_gc_workqueue)
520 goto out_destroy_reclaim;
521
522 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s",
523 XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id);
524 if (!mp->m_sync_workqueue)
525 goto out_destroy_eofb;
526
527 return 0;
528
529out_destroy_eofb:
530 destroy_workqueue(mp->m_gc_workqueue);
531out_destroy_reclaim:
532 destroy_workqueue(mp->m_reclaim_workqueue);
533out_destroy_cil:
534 destroy_workqueue(mp->m_cil_workqueue);
535out_destroy_unwritten:
536 destroy_workqueue(mp->m_unwritten_workqueue);
537out_destroy_buf:
538 destroy_workqueue(mp->m_buf_workqueue);
539out:
540 return -ENOMEM;
541}
542
543STATIC void
544xfs_destroy_mount_workqueues(
545 struct xfs_mount *mp)
546{
547 destroy_workqueue(mp->m_sync_workqueue);
548 destroy_workqueue(mp->m_gc_workqueue);
549 destroy_workqueue(mp->m_reclaim_workqueue);
550 destroy_workqueue(mp->m_cil_workqueue);
551 destroy_workqueue(mp->m_unwritten_workqueue);
552 destroy_workqueue(mp->m_buf_workqueue);
553}
554
555static void
556xfs_flush_inodes_worker(
557 struct work_struct *work)
558{
559 struct xfs_mount *mp = container_of(work, struct xfs_mount,
560 m_flush_inodes_work);
561 struct super_block *sb = mp->m_super;
562
563 if (down_read_trylock(&sb->s_umount)) {
564 sync_inodes_sb(sb);
565 up_read(&sb->s_umount);
566 }
567}
568
569/*
570 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
571 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
572 * for IO to complete so that we effectively throttle multiple callers to the
573 * rate at which IO is completing.
574 */
575void
576xfs_flush_inodes(
577 struct xfs_mount *mp)
578{
579 /*
580 * If flush_work() returns true then that means we waited for a flush
581 * which was already in progress. Don't bother running another scan.
582 */
583 if (flush_work(&mp->m_flush_inodes_work))
584 return;
585
586 queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
587 flush_work(&mp->m_flush_inodes_work);
588}
589
590/* Catch misguided souls that try to use this interface on XFS */
591STATIC struct inode *
592xfs_fs_alloc_inode(
593 struct super_block *sb)
594{
595 BUG();
596 return NULL;
597}
598
599#ifdef DEBUG
600static void
601xfs_check_delalloc(
602 struct xfs_inode *ip,
603 int whichfork)
604{
605 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
606 struct xfs_bmbt_irec got;
607 struct xfs_iext_cursor icur;
608
609 if (!ifp || !xfs_iext_lookup_extent(ip, ifp, 0, &icur, &got))
610 return;
611 do {
612 if (isnullstartblock(got.br_startblock)) {
613 xfs_warn(ip->i_mount,
614 "ino %llx %s fork has delalloc extent at [0x%llx:0x%llx]",
615 ip->i_ino,
616 whichfork == XFS_DATA_FORK ? "data" : "cow",
617 got.br_startoff, got.br_blockcount);
618 }
619 } while (xfs_iext_next_extent(ifp, &icur, &got));
620}
621#else
622#define xfs_check_delalloc(ip, whichfork) do { } while (0)
623#endif
624
625/*
626 * Now that the generic code is guaranteed not to be accessing
627 * the linux inode, we can inactivate and reclaim the inode.
628 */
629STATIC void
630xfs_fs_destroy_inode(
631 struct inode *inode)
632{
633 struct xfs_inode *ip = XFS_I(inode);
634
635 trace_xfs_destroy_inode(ip);
636
637 ASSERT(!rwsem_is_locked(&inode->i_rwsem));
638 XFS_STATS_INC(ip->i_mount, vn_rele);
639 XFS_STATS_INC(ip->i_mount, vn_remove);
640
641 xfs_inactive(ip);
642
643 if (!XFS_FORCED_SHUTDOWN(ip->i_mount) && ip->i_delayed_blks) {
644 xfs_check_delalloc(ip, XFS_DATA_FORK);
645 xfs_check_delalloc(ip, XFS_COW_FORK);
646 ASSERT(0);
647 }
648
649 XFS_STATS_INC(ip->i_mount, vn_reclaim);
650
651 /*
652 * We should never get here with one of the reclaim flags already set.
653 */
654 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
655 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
656
657 /*
658 * We always use background reclaim here because even if the inode is
659 * clean, it still may be under IO and hence we have wait for IO
660 * completion to occur before we can reclaim the inode. The background
661 * reclaim path handles this more efficiently than we can here, so
662 * simply let background reclaim tear down all inodes.
663 */
664 xfs_inode_mark_reclaimable(ip);
665}
666
667static void
668xfs_fs_dirty_inode(
669 struct inode *inode,
670 int flag)
671{
672 struct xfs_inode *ip = XFS_I(inode);
673 struct xfs_mount *mp = ip->i_mount;
674 struct xfs_trans *tp;
675
676 if (!(inode->i_sb->s_flags & SB_LAZYTIME))
677 return;
678 if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME))
679 return;
680
681 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
682 return;
683 xfs_ilock(ip, XFS_ILOCK_EXCL);
684 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
685 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
686 xfs_trans_commit(tp);
687}
688
689/*
690 * Slab object creation initialisation for the XFS inode.
691 * This covers only the idempotent fields in the XFS inode;
692 * all other fields need to be initialised on allocation
693 * from the slab. This avoids the need to repeatedly initialise
694 * fields in the xfs inode that left in the initialise state
695 * when freeing the inode.
696 */
697STATIC void
698xfs_fs_inode_init_once(
699 void *inode)
700{
701 struct xfs_inode *ip = inode;
702
703 memset(ip, 0, sizeof(struct xfs_inode));
704
705 /* vfs inode */
706 inode_init_once(VFS_I(ip));
707
708 /* xfs inode */
709 atomic_set(&ip->i_pincount, 0);
710 spin_lock_init(&ip->i_flags_lock);
711
712 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
713 "xfsino", ip->i_ino);
714 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
715 "xfsino", ip->i_ino);
716}
717
718/*
719 * We do an unlocked check for XFS_IDONTCACHE here because we are already
720 * serialised against cache hits here via the inode->i_lock and igrab() in
721 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
722 * racing with us, and it avoids needing to grab a spinlock here for every inode
723 * we drop the final reference on.
724 */
725STATIC int
726xfs_fs_drop_inode(
727 struct inode *inode)
728{
729 struct xfs_inode *ip = XFS_I(inode);
730
731 /*
732 * If this unlinked inode is in the middle of recovery, don't
733 * drop the inode just yet; log recovery will take care of
734 * that. See the comment for this inode flag.
735 */
736 if (ip->i_flags & XFS_IRECOVERY) {
737 ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
738 return 0;
739 }
740
741 return generic_drop_inode(inode);
742}
743
744static void
745xfs_mount_free(
746 struct xfs_mount *mp)
747{
748 kfree(mp->m_rtname);
749 kfree(mp->m_logname);
750 kmem_free(mp);
751}
752
753STATIC int
754xfs_fs_sync_fs(
755 struct super_block *sb,
756 int wait)
757{
758 struct xfs_mount *mp = XFS_M(sb);
759
760 /*
761 * Doing anything during the async pass would be counterproductive.
762 */
763 if (!wait)
764 return 0;
765
766 xfs_log_force(mp, XFS_LOG_SYNC);
767 if (laptop_mode) {
768 /*
769 * The disk must be active because we're syncing.
770 * We schedule log work now (now that the disk is
771 * active) instead of later (when it might not be).
772 */
773 flush_delayed_work(&mp->m_log->l_work);
774 }
775
776 return 0;
777}
778
779STATIC int
780xfs_fs_statfs(
781 struct dentry *dentry,
782 struct kstatfs *statp)
783{
784 struct xfs_mount *mp = XFS_M(dentry->d_sb);
785 xfs_sb_t *sbp = &mp->m_sb;
786 struct xfs_inode *ip = XFS_I(d_inode(dentry));
787 uint64_t fakeinos, id;
788 uint64_t icount;
789 uint64_t ifree;
790 uint64_t fdblocks;
791 xfs_extlen_t lsize;
792 int64_t ffree;
793
794 statp->f_type = XFS_SUPER_MAGIC;
795 statp->f_namelen = MAXNAMELEN - 1;
796
797 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
798 statp->f_fsid = u64_to_fsid(id);
799
800 icount = percpu_counter_sum(&mp->m_icount);
801 ifree = percpu_counter_sum(&mp->m_ifree);
802 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
803
804 spin_lock(&mp->m_sb_lock);
805 statp->f_bsize = sbp->sb_blocksize;
806 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
807 statp->f_blocks = sbp->sb_dblocks - lsize;
808 spin_unlock(&mp->m_sb_lock);
809
810 /* make sure statp->f_bfree does not underflow */
811 statp->f_bfree = max_t(int64_t, fdblocks - mp->m_alloc_set_aside, 0);
812 statp->f_bavail = statp->f_bfree;
813
814 fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
815 statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
816 if (M_IGEO(mp)->maxicount)
817 statp->f_files = min_t(typeof(statp->f_files),
818 statp->f_files,
819 M_IGEO(mp)->maxicount);
820
821 /* If sb_icount overshot maxicount, report actual allocation */
822 statp->f_files = max_t(typeof(statp->f_files),
823 statp->f_files,
824 sbp->sb_icount);
825
826 /* make sure statp->f_ffree does not underflow */
827 ffree = statp->f_files - (icount - ifree);
828 statp->f_ffree = max_t(int64_t, ffree, 0);
829
830
831 if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
832 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
833 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
834 xfs_qm_statvfs(ip, statp);
835
836 if (XFS_IS_REALTIME_MOUNT(mp) &&
837 (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
838 statp->f_blocks = sbp->sb_rblocks;
839 statp->f_bavail = statp->f_bfree =
840 sbp->sb_frextents * sbp->sb_rextsize;
841 }
842
843 return 0;
844}
845
846STATIC void
847xfs_save_resvblks(struct xfs_mount *mp)
848{
849 uint64_t resblks = 0;
850
851 mp->m_resblks_save = mp->m_resblks;
852 xfs_reserve_blocks(mp, &resblks, NULL);
853}
854
855STATIC void
856xfs_restore_resvblks(struct xfs_mount *mp)
857{
858 uint64_t resblks;
859
860 if (mp->m_resblks_save) {
861 resblks = mp->m_resblks_save;
862 mp->m_resblks_save = 0;
863 } else
864 resblks = xfs_default_resblks(mp);
865
866 xfs_reserve_blocks(mp, &resblks, NULL);
867}
868
869/*
870 * Second stage of a freeze. The data is already frozen so we only
871 * need to take care of the metadata. Once that's done sync the superblock
872 * to the log to dirty it in case of a crash while frozen. This ensures that we
873 * will recover the unlinked inode lists on the next mount.
874 */
875STATIC int
876xfs_fs_freeze(
877 struct super_block *sb)
878{
879 struct xfs_mount *mp = XFS_M(sb);
880 unsigned int flags;
881 int ret;
882
883 /*
884 * The filesystem is now frozen far enough that memory reclaim
885 * cannot safely operate on the filesystem. Hence we need to
886 * set a GFP_NOFS context here to avoid recursion deadlocks.
887 */
888 flags = memalloc_nofs_save();
889 xfs_blockgc_stop(mp);
890 xfs_save_resvblks(mp);
891 ret = xfs_log_quiesce(mp);
892 memalloc_nofs_restore(flags);
893 return ret;
894}
895
896STATIC int
897xfs_fs_unfreeze(
898 struct super_block *sb)
899{
900 struct xfs_mount *mp = XFS_M(sb);
901
902 xfs_restore_resvblks(mp);
903 xfs_log_work_queue(mp);
904 xfs_blockgc_start(mp);
905 return 0;
906}
907
908/*
909 * This function fills in xfs_mount_t fields based on mount args.
910 * Note: the superblock _has_ now been read in.
911 */
912STATIC int
913xfs_finish_flags(
914 struct xfs_mount *mp)
915{
916 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
917
918 /* Fail a mount where the logbuf is smaller than the log stripe */
919 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
920 if (mp->m_logbsize <= 0 &&
921 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
922 mp->m_logbsize = mp->m_sb.sb_logsunit;
923 } else if (mp->m_logbsize > 0 &&
924 mp->m_logbsize < mp->m_sb.sb_logsunit) {
925 xfs_warn(mp,
926 "logbuf size must be greater than or equal to log stripe size");
927 return -EINVAL;
928 }
929 } else {
930 /* Fail a mount if the logbuf is larger than 32K */
931 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
932 xfs_warn(mp,
933 "logbuf size for version 1 logs must be 16K or 32K");
934 return -EINVAL;
935 }
936 }
937
938 /*
939 * V5 filesystems always use attr2 format for attributes.
940 */
941 if (xfs_sb_version_hascrc(&mp->m_sb) &&
942 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
943 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
944 "attr2 is always enabled for V5 filesystems.");
945 return -EINVAL;
946 }
947
948 /*
949 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
950 * told by noattr2 to turn it off
951 */
952 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
953 !(mp->m_flags & XFS_MOUNT_NOATTR2))
954 mp->m_flags |= XFS_MOUNT_ATTR2;
955
956 /*
957 * prohibit r/w mounts of read-only filesystems
958 */
959 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
960 xfs_warn(mp,
961 "cannot mount a read-only filesystem as read-write");
962 return -EROFS;
963 }
964
965 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
966 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
967 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
968 xfs_warn(mp,
969 "Super block does not support project and group quota together");
970 return -EINVAL;
971 }
972
973 return 0;
974}
975
976static int
977xfs_init_percpu_counters(
978 struct xfs_mount *mp)
979{
980 int error;
981
982 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
983 if (error)
984 return -ENOMEM;
985
986 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
987 if (error)
988 goto free_icount;
989
990 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
991 if (error)
992 goto free_ifree;
993
994 error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
995 if (error)
996 goto free_fdblocks;
997
998 return 0;
999
1000free_fdblocks:
1001 percpu_counter_destroy(&mp->m_fdblocks);
1002free_ifree:
1003 percpu_counter_destroy(&mp->m_ifree);
1004free_icount:
1005 percpu_counter_destroy(&mp->m_icount);
1006 return -ENOMEM;
1007}
1008
1009void
1010xfs_reinit_percpu_counters(
1011 struct xfs_mount *mp)
1012{
1013 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1014 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1015 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1016}
1017
1018static void
1019xfs_destroy_percpu_counters(
1020 struct xfs_mount *mp)
1021{
1022 percpu_counter_destroy(&mp->m_icount);
1023 percpu_counter_destroy(&mp->m_ifree);
1024 percpu_counter_destroy(&mp->m_fdblocks);
1025 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
1026 percpu_counter_sum(&mp->m_delalloc_blks) == 0);
1027 percpu_counter_destroy(&mp->m_delalloc_blks);
1028}
1029
1030static void
1031xfs_fs_put_super(
1032 struct super_block *sb)
1033{
1034 struct xfs_mount *mp = XFS_M(sb);
1035
1036 /* if ->fill_super failed, we have no mount to tear down */
1037 if (!sb->s_fs_info)
1038 return;
1039
1040 xfs_notice(mp, "Unmounting Filesystem");
1041 xfs_filestream_unmount(mp);
1042 xfs_unmountfs(mp);
1043
1044 xfs_freesb(mp);
1045 free_percpu(mp->m_stats.xs_stats);
1046 xfs_destroy_percpu_counters(mp);
1047 xfs_destroy_mount_workqueues(mp);
1048 xfs_close_devices(mp);
1049
1050 sb->s_fs_info = NULL;
1051 xfs_mount_free(mp);
1052}
1053
1054static long
1055xfs_fs_nr_cached_objects(
1056 struct super_block *sb,
1057 struct shrink_control *sc)
1058{
1059 /* Paranoia: catch incorrect calls during mount setup or teardown */
1060 if (WARN_ON_ONCE(!sb->s_fs_info))
1061 return 0;
1062 return xfs_reclaim_inodes_count(XFS_M(sb));
1063}
1064
1065static long
1066xfs_fs_free_cached_objects(
1067 struct super_block *sb,
1068 struct shrink_control *sc)
1069{
1070 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1071}
1072
1073static const struct super_operations xfs_super_operations = {
1074 .alloc_inode = xfs_fs_alloc_inode,
1075 .destroy_inode = xfs_fs_destroy_inode,
1076 .dirty_inode = xfs_fs_dirty_inode,
1077 .drop_inode = xfs_fs_drop_inode,
1078 .put_super = xfs_fs_put_super,
1079 .sync_fs = xfs_fs_sync_fs,
1080 .freeze_fs = xfs_fs_freeze,
1081 .unfreeze_fs = xfs_fs_unfreeze,
1082 .statfs = xfs_fs_statfs,
1083 .show_options = xfs_fs_show_options,
1084 .nr_cached_objects = xfs_fs_nr_cached_objects,
1085 .free_cached_objects = xfs_fs_free_cached_objects,
1086};
1087
1088static int
1089suffix_kstrtoint(
1090 const char *s,
1091 unsigned int base,
1092 int *res)
1093{
1094 int last, shift_left_factor = 0, _res;
1095 char *value;
1096 int ret = 0;
1097
1098 value = kstrdup(s, GFP_KERNEL);
1099 if (!value)
1100 return -ENOMEM;
1101
1102 last = strlen(value) - 1;
1103 if (value[last] == 'K' || value[last] == 'k') {
1104 shift_left_factor = 10;
1105 value[last] = '\0';
1106 }
1107 if (value[last] == 'M' || value[last] == 'm') {
1108 shift_left_factor = 20;
1109 value[last] = '\0';
1110 }
1111 if (value[last] == 'G' || value[last] == 'g') {
1112 shift_left_factor = 30;
1113 value[last] = '\0';
1114 }
1115
1116 if (kstrtoint(value, base, &_res))
1117 ret = -EINVAL;
1118 kfree(value);
1119 *res = _res << shift_left_factor;
1120 return ret;
1121}
1122
1123static inline void
1124xfs_fs_warn_deprecated(
1125 struct fs_context *fc,
1126 struct fs_parameter *param,
1127 uint64_t flag,
1128 bool value)
1129{
1130 /* Don't print the warning if reconfiguring and current mount point
1131 * already had the flag set
1132 */
1133 if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
1134 !!(XFS_M(fc->root->d_sb)->m_flags & flag) == value)
1135 return;
1136 xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
1137}
1138
1139/*
1140 * Set mount state from a mount option.
1141 *
1142 * NOTE: mp->m_super is NULL here!
1143 */
1144static int
1145xfs_fs_parse_param(
1146 struct fs_context *fc,
1147 struct fs_parameter *param)
1148{
1149 struct xfs_mount *parsing_mp = fc->s_fs_info;
1150 struct fs_parse_result result;
1151 int size = 0;
1152 int opt;
1153
1154 opt = fs_parse(fc, xfs_fs_parameters, param, &result);
1155 if (opt < 0)
1156 return opt;
1157
1158 switch (opt) {
1159 case Opt_logbufs:
1160 parsing_mp->m_logbufs = result.uint_32;
1161 return 0;
1162 case Opt_logbsize:
1163 if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize))
1164 return -EINVAL;
1165 return 0;
1166 case Opt_logdev:
1167 kfree(parsing_mp->m_logname);
1168 parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL);
1169 if (!parsing_mp->m_logname)
1170 return -ENOMEM;
1171 return 0;
1172 case Opt_rtdev:
1173 kfree(parsing_mp->m_rtname);
1174 parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
1175 if (!parsing_mp->m_rtname)
1176 return -ENOMEM;
1177 return 0;
1178 case Opt_allocsize:
1179 if (suffix_kstrtoint(param->string, 10, &size))
1180 return -EINVAL;
1181 parsing_mp->m_allocsize_log = ffs(size) - 1;
1182 parsing_mp->m_flags |= XFS_MOUNT_ALLOCSIZE;
1183 return 0;
1184 case Opt_grpid:
1185 case Opt_bsdgroups:
1186 parsing_mp->m_flags |= XFS_MOUNT_GRPID;
1187 return 0;
1188 case Opt_nogrpid:
1189 case Opt_sysvgroups:
1190 parsing_mp->m_flags &= ~XFS_MOUNT_GRPID;
1191 return 0;
1192 case Opt_wsync:
1193 parsing_mp->m_flags |= XFS_MOUNT_WSYNC;
1194 return 0;
1195 case Opt_norecovery:
1196 parsing_mp->m_flags |= XFS_MOUNT_NORECOVERY;
1197 return 0;
1198 case Opt_noalign:
1199 parsing_mp->m_flags |= XFS_MOUNT_NOALIGN;
1200 return 0;
1201 case Opt_swalloc:
1202 parsing_mp->m_flags |= XFS_MOUNT_SWALLOC;
1203 return 0;
1204 case Opt_sunit:
1205 parsing_mp->m_dalign = result.uint_32;
1206 return 0;
1207 case Opt_swidth:
1208 parsing_mp->m_swidth = result.uint_32;
1209 return 0;
1210 case Opt_inode32:
1211 parsing_mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1212 return 0;
1213 case Opt_inode64:
1214 parsing_mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1215 return 0;
1216 case Opt_nouuid:
1217 parsing_mp->m_flags |= XFS_MOUNT_NOUUID;
1218 return 0;
1219 case Opt_largeio:
1220 parsing_mp->m_flags |= XFS_MOUNT_LARGEIO;
1221 return 0;
1222 case Opt_nolargeio:
1223 parsing_mp->m_flags &= ~XFS_MOUNT_LARGEIO;
1224 return 0;
1225 case Opt_filestreams:
1226 parsing_mp->m_flags |= XFS_MOUNT_FILESTREAMS;
1227 return 0;
1228 case Opt_noquota:
1229 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
1230 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
1231 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
1232 return 0;
1233 case Opt_quota:
1234 case Opt_uquota:
1235 case Opt_usrquota:
1236 parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
1237 XFS_UQUOTA_ENFD);
1238 return 0;
1239 case Opt_qnoenforce:
1240 case Opt_uqnoenforce:
1241 parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
1242 parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
1243 return 0;
1244 case Opt_pquota:
1245 case Opt_prjquota:
1246 parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
1247 XFS_PQUOTA_ENFD);
1248 return 0;
1249 case Opt_pqnoenforce:
1250 parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
1251 parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
1252 return 0;
1253 case Opt_gquota:
1254 case Opt_grpquota:
1255 parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
1256 XFS_GQUOTA_ENFD);
1257 return 0;
1258 case Opt_gqnoenforce:
1259 parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
1260 parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
1261 return 0;
1262 case Opt_discard:
1263 parsing_mp->m_flags |= XFS_MOUNT_DISCARD;
1264 return 0;
1265 case Opt_nodiscard:
1266 parsing_mp->m_flags &= ~XFS_MOUNT_DISCARD;
1267 return 0;
1268#ifdef CONFIG_FS_DAX
1269 case Opt_dax:
1270 xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS);
1271 return 0;
1272 case Opt_dax_enum:
1273 xfs_mount_set_dax_mode(parsing_mp, result.uint_32);
1274 return 0;
1275#endif
1276 /* Following mount options will be removed in September 2025 */
1277 case Opt_ikeep:
1278 xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_IKEEP, true);
1279 parsing_mp->m_flags |= XFS_MOUNT_IKEEP;
1280 return 0;
1281 case Opt_noikeep:
1282 xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_IKEEP, false);
1283 parsing_mp->m_flags &= ~XFS_MOUNT_IKEEP;
1284 return 0;
1285 case Opt_attr2:
1286 xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_ATTR2, true);
1287 parsing_mp->m_flags |= XFS_MOUNT_ATTR2;
1288 return 0;
1289 case Opt_noattr2:
1290 xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_NOATTR2, true);
1291 parsing_mp->m_flags &= ~XFS_MOUNT_ATTR2;
1292 parsing_mp->m_flags |= XFS_MOUNT_NOATTR2;
1293 return 0;
1294 default:
1295 xfs_warn(parsing_mp, "unknown mount option [%s].", param->key);
1296 return -EINVAL;
1297 }
1298
1299 return 0;
1300}
1301
1302static int
1303xfs_fs_validate_params(
1304 struct xfs_mount *mp)
1305{
1306 /*
1307 * no recovery flag requires a read-only mount
1308 */
1309 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
1310 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
1311 xfs_warn(mp, "no-recovery mounts must be read-only.");
1312 return -EINVAL;
1313 }
1314
1315 if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
1316 (mp->m_dalign || mp->m_swidth)) {
1317 xfs_warn(mp,
1318 "sunit and swidth options incompatible with the noalign option");
1319 return -EINVAL;
1320 }
1321
1322 if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
1323 xfs_warn(mp, "quota support not available in this kernel.");
1324 return -EINVAL;
1325 }
1326
1327 if ((mp->m_dalign && !mp->m_swidth) ||
1328 (!mp->m_dalign && mp->m_swidth)) {
1329 xfs_warn(mp, "sunit and swidth must be specified together");
1330 return -EINVAL;
1331 }
1332
1333 if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
1334 xfs_warn(mp,
1335 "stripe width (%d) must be a multiple of the stripe unit (%d)",
1336 mp->m_swidth, mp->m_dalign);
1337 return -EINVAL;
1338 }
1339
1340 if (mp->m_logbufs != -1 &&
1341 mp->m_logbufs != 0 &&
1342 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
1343 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
1344 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
1345 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
1346 return -EINVAL;
1347 }
1348
1349 if (mp->m_logbsize != -1 &&
1350 mp->m_logbsize != 0 &&
1351 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
1352 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
1353 !is_power_of_2(mp->m_logbsize))) {
1354 xfs_warn(mp,
1355 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
1356 mp->m_logbsize);
1357 return -EINVAL;
1358 }
1359
1360 if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) &&
1361 (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
1362 mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
1363 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
1364 mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
1365 return -EINVAL;
1366 }
1367
1368 return 0;
1369}
1370
1371static int
1372xfs_fs_fill_super(
1373 struct super_block *sb,
1374 struct fs_context *fc)
1375{
1376 struct xfs_mount *mp = sb->s_fs_info;
1377 struct inode *root;
1378 int flags = 0, error;
1379
1380 mp->m_super = sb;
1381
1382 error = xfs_fs_validate_params(mp);
1383 if (error)
1384 goto out_free_names;
1385
1386 sb_min_blocksize(sb, BBSIZE);
1387 sb->s_xattr = xfs_xattr_handlers;
1388 sb->s_export_op = &xfs_export_operations;
1389#ifdef CONFIG_XFS_QUOTA
1390 sb->s_qcop = &xfs_quotactl_operations;
1391 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1392#endif
1393 sb->s_op = &xfs_super_operations;
1394
1395 /*
1396 * Delay mount work if the debug hook is set. This is debug
1397 * instrumention to coordinate simulation of xfs mount failures with
1398 * VFS superblock operations
1399 */
1400 if (xfs_globals.mount_delay) {
1401 xfs_notice(mp, "Delaying mount for %d seconds.",
1402 xfs_globals.mount_delay);
1403 msleep(xfs_globals.mount_delay * 1000);
1404 }
1405
1406 if (fc->sb_flags & SB_SILENT)
1407 flags |= XFS_MFSI_QUIET;
1408
1409 error = xfs_open_devices(mp);
1410 if (error)
1411 goto out_free_names;
1412
1413 error = xfs_init_mount_workqueues(mp);
1414 if (error)
1415 goto out_close_devices;
1416
1417 error = xfs_init_percpu_counters(mp);
1418 if (error)
1419 goto out_destroy_workqueues;
1420
1421 /* Allocate stats memory before we do operations that might use it */
1422 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1423 if (!mp->m_stats.xs_stats) {
1424 error = -ENOMEM;
1425 goto out_destroy_counters;
1426 }
1427
1428 error = xfs_readsb(mp, flags);
1429 if (error)
1430 goto out_free_stats;
1431
1432 error = xfs_finish_flags(mp);
1433 if (error)
1434 goto out_free_sb;
1435
1436 error = xfs_setup_devices(mp);
1437 if (error)
1438 goto out_free_sb;
1439
1440 /* V4 support is undergoing deprecation. */
1441 if (!xfs_sb_version_hascrc(&mp->m_sb)) {
1442#ifdef CONFIG_XFS_SUPPORT_V4
1443 xfs_warn_once(mp,
1444 "Deprecated V4 format (crc=0) will not be supported after September 2030.");
1445#else
1446 xfs_warn(mp,
1447 "Deprecated V4 format (crc=0) not supported by kernel.");
1448 error = -EINVAL;
1449 goto out_free_sb;
1450#endif
1451 }
1452
1453 /* Filesystem claims it needs repair, so refuse the mount. */
1454 if (xfs_sb_version_needsrepair(&mp->m_sb)) {
1455 xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair.");
1456 error = -EFSCORRUPTED;
1457 goto out_free_sb;
1458 }
1459
1460 /*
1461 * Don't touch the filesystem if a user tool thinks it owns the primary
1462 * superblock. mkfs doesn't clear the flag from secondary supers, so
1463 * we don't check them at all.
1464 */
1465 if (mp->m_sb.sb_inprogress) {
1466 xfs_warn(mp, "Offline file system operation in progress!");
1467 error = -EFSCORRUPTED;
1468 goto out_free_sb;
1469 }
1470
1471 /*
1472 * Until this is fixed only page-sized or smaller data blocks work.
1473 */
1474 if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
1475 xfs_warn(mp,
1476 "File system with blocksize %d bytes. "
1477 "Only pagesize (%ld) or less will currently work.",
1478 mp->m_sb.sb_blocksize, PAGE_SIZE);
1479 error = -ENOSYS;
1480 goto out_free_sb;
1481 }
1482
1483 /* Ensure this filesystem fits in the page cache limits */
1484 if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) ||
1485 xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) {
1486 xfs_warn(mp,
1487 "file system too large to be mounted on this system.");
1488 error = -EFBIG;
1489 goto out_free_sb;
1490 }
1491
1492 /*
1493 * XFS block mappings use 54 bits to store the logical block offset.
1494 * This should suffice to handle the maximum file size that the VFS
1495 * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
1496 * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
1497 * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
1498 * to check this assertion.
1499 *
1500 * Avoid integer overflow by comparing the maximum bmbt offset to the
1501 * maximum pagecache offset in units of fs blocks.
1502 */
1503 if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
1504 xfs_warn(mp,
1505"MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
1506 XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
1507 XFS_MAX_FILEOFF);
1508 error = -EINVAL;
1509 goto out_free_sb;
1510 }
1511
1512 error = xfs_filestream_mount(mp);
1513 if (error)
1514 goto out_free_sb;
1515
1516 /*
1517 * we must configure the block size in the superblock before we run the
1518 * full mount process as the mount process can lookup and cache inodes.
1519 */
1520 sb->s_magic = XFS_SUPER_MAGIC;
1521 sb->s_blocksize = mp->m_sb.sb_blocksize;
1522 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1523 sb->s_maxbytes = MAX_LFS_FILESIZE;
1524 sb->s_max_links = XFS_MAXLINK;
1525 sb->s_time_gran = 1;
1526 if (xfs_sb_version_hasbigtime(&mp->m_sb)) {
1527 sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
1528 sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
1529 } else {
1530 sb->s_time_min = XFS_LEGACY_TIME_MIN;
1531 sb->s_time_max = XFS_LEGACY_TIME_MAX;
1532 }
1533 trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);
1534 sb->s_iflags |= SB_I_CGROUPWB;
1535
1536 set_posix_acl_flag(sb);
1537
1538 /* version 5 superblocks support inode version counters. */
1539 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1540 sb->s_flags |= SB_I_VERSION;
1541
1542 if (xfs_sb_version_hasbigtime(&mp->m_sb))
1543 xfs_warn(mp,
1544 "EXPERIMENTAL big timestamp feature in use. Use at your own risk!");
1545
1546 if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) {
1547 bool rtdev_is_dax = false, datadev_is_dax;
1548
1549 xfs_warn(mp,
1550 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1551
1552 datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev,
1553 sb->s_blocksize);
1554 if (mp->m_rtdev_targp)
1555 rtdev_is_dax = bdev_dax_supported(
1556 mp->m_rtdev_targp->bt_bdev, sb->s_blocksize);
1557 if (!rtdev_is_dax && !datadev_is_dax) {
1558 xfs_alert(mp,
1559 "DAX unsupported by block device. Turning off DAX.");
1560 xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
1561 }
1562 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
1563 xfs_alert(mp,
1564 "DAX and reflink cannot be used together!");
1565 error = -EINVAL;
1566 goto out_filestream_unmount;
1567 }
1568 }
1569
1570 if (mp->m_flags & XFS_MOUNT_DISCARD) {
1571 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1572
1573 if (!blk_queue_discard(q)) {
1574 xfs_warn(mp, "mounting with \"discard\" option, but "
1575 "the device does not support discard");
1576 mp->m_flags &= ~XFS_MOUNT_DISCARD;
1577 }
1578 }
1579
1580 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
1581 if (mp->m_sb.sb_rblocks) {
1582 xfs_alert(mp,
1583 "reflink not compatible with realtime device!");
1584 error = -EINVAL;
1585 goto out_filestream_unmount;
1586 }
1587
1588 if (xfs_globals.always_cow) {
1589 xfs_info(mp, "using DEBUG-only always_cow mode.");
1590 mp->m_always_cow = true;
1591 }
1592 }
1593
1594 if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
1595 xfs_alert(mp,
1596 "reverse mapping btree not compatible with realtime device!");
1597 error = -EINVAL;
1598 goto out_filestream_unmount;
1599 }
1600
1601 if (xfs_sb_version_hasinobtcounts(&mp->m_sb))
1602 xfs_warn(mp,
1603 "EXPERIMENTAL inode btree counters feature in use. Use at your own risk!");
1604
1605 error = xfs_mountfs(mp);
1606 if (error)
1607 goto out_filestream_unmount;
1608
1609 root = igrab(VFS_I(mp->m_rootip));
1610 if (!root) {
1611 error = -ENOENT;
1612 goto out_unmount;
1613 }
1614 sb->s_root = d_make_root(root);
1615 if (!sb->s_root) {
1616 error = -ENOMEM;
1617 goto out_unmount;
1618 }
1619
1620 return 0;
1621
1622 out_filestream_unmount:
1623 xfs_filestream_unmount(mp);
1624 out_free_sb:
1625 xfs_freesb(mp);
1626 out_free_stats:
1627 free_percpu(mp->m_stats.xs_stats);
1628 out_destroy_counters:
1629 xfs_destroy_percpu_counters(mp);
1630 out_destroy_workqueues:
1631 xfs_destroy_mount_workqueues(mp);
1632 out_close_devices:
1633 xfs_close_devices(mp);
1634 out_free_names:
1635 sb->s_fs_info = NULL;
1636 xfs_mount_free(mp);
1637 return error;
1638
1639 out_unmount:
1640 xfs_filestream_unmount(mp);
1641 xfs_unmountfs(mp);
1642 goto out_free_sb;
1643}
1644
1645static int
1646xfs_fs_get_tree(
1647 struct fs_context *fc)
1648{
1649 return get_tree_bdev(fc, xfs_fs_fill_super);
1650}
1651
1652static int
1653xfs_remount_rw(
1654 struct xfs_mount *mp)
1655{
1656 struct xfs_sb *sbp = &mp->m_sb;
1657 int error;
1658
1659 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1660 xfs_warn(mp,
1661 "ro->rw transition prohibited on norecovery mount");
1662 return -EINVAL;
1663 }
1664
1665 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
1666 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1667 xfs_warn(mp,
1668 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1669 (sbp->sb_features_ro_compat &
1670 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1671 return -EINVAL;
1672 }
1673
1674 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1675
1676 /*
1677 * If this is the first remount to writeable state we might have some
1678 * superblock changes to update.
1679 */
1680 if (mp->m_update_sb) {
1681 error = xfs_sync_sb(mp, false);
1682 if (error) {
1683 xfs_warn(mp, "failed to write sb changes");
1684 return error;
1685 }
1686 mp->m_update_sb = false;
1687 }
1688
1689 /*
1690 * Fill out the reserve pool if it is empty. Use the stashed value if
1691 * it is non-zero, otherwise go with the default.
1692 */
1693 xfs_restore_resvblks(mp);
1694 xfs_log_work_queue(mp);
1695
1696 /* Recover any CoW blocks that never got remapped. */
1697 error = xfs_reflink_recover_cow(mp);
1698 if (error) {
1699 xfs_err(mp,
1700 "Error %d recovering leftover CoW allocations.", error);
1701 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1702 return error;
1703 }
1704 xfs_blockgc_start(mp);
1705
1706 /* Create the per-AG metadata reservation pool .*/
1707 error = xfs_fs_reserve_ag_blocks(mp);
1708 if (error && error != -ENOSPC)
1709 return error;
1710
1711 return 0;
1712}
1713
1714static int
1715xfs_remount_ro(
1716 struct xfs_mount *mp)
1717{
1718 int error;
1719
1720 /*
1721 * Cancel background eofb scanning so it cannot race with the final
1722 * log force+buftarg wait and deadlock the remount.
1723 */
1724 xfs_blockgc_stop(mp);
1725
1726 /* Get rid of any leftover CoW reservations... */
1727 error = xfs_blockgc_free_space(mp, NULL);
1728 if (error) {
1729 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1730 return error;
1731 }
1732
1733 /* Free the per-AG metadata reservation pool. */
1734 error = xfs_fs_unreserve_ag_blocks(mp);
1735 if (error) {
1736 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1737 return error;
1738 }
1739
1740 /*
1741 * Before we sync the metadata, we need to free up the reserve block
1742 * pool so that the used block count in the superblock on disk is
1743 * correct at the end of the remount. Stash the current* reserve pool
1744 * size so that if we get remounted rw, we can return it to the same
1745 * size.
1746 */
1747 xfs_save_resvblks(mp);
1748
1749 xfs_log_clean(mp);
1750 mp->m_flags |= XFS_MOUNT_RDONLY;
1751
1752 return 0;
1753}
1754
1755/*
1756 * Logically we would return an error here to prevent users from believing
1757 * they might have changed mount options using remount which can't be changed.
1758 *
1759 * But unfortunately mount(8) adds all options from mtab and fstab to the mount
1760 * arguments in some cases so we can't blindly reject options, but have to
1761 * check for each specified option if it actually differs from the currently
1762 * set option and only reject it if that's the case.
1763 *
1764 * Until that is implemented we return success for every remount request, and
1765 * silently ignore all options that we can't actually change.
1766 */
1767static int
1768xfs_fs_reconfigure(
1769 struct fs_context *fc)
1770{
1771 struct xfs_mount *mp = XFS_M(fc->root->d_sb);
1772 struct xfs_mount *new_mp = fc->s_fs_info;
1773 xfs_sb_t *sbp = &mp->m_sb;
1774 int flags = fc->sb_flags;
1775 int error;
1776
1777 /* version 5 superblocks always support version counters. */
1778 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1779 fc->sb_flags |= SB_I_VERSION;
1780
1781 error = xfs_fs_validate_params(new_mp);
1782 if (error)
1783 return error;
1784
1785 sync_filesystem(mp->m_super);
1786
1787 /* inode32 -> inode64 */
1788 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
1789 !(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
1790 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1791 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1792 }
1793
1794 /* inode64 -> inode32 */
1795 if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
1796 (new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
1797 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1798 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1799 }
1800
1801 /* ro -> rw */
1802 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) {
1803 error = xfs_remount_rw(mp);
1804 if (error)
1805 return error;
1806 }
1807
1808 /* rw -> ro */
1809 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (flags & SB_RDONLY)) {
1810 error = xfs_remount_ro(mp);
1811 if (error)
1812 return error;
1813 }
1814
1815 return 0;
1816}
1817
1818static void xfs_fs_free(
1819 struct fs_context *fc)
1820{
1821 struct xfs_mount *mp = fc->s_fs_info;
1822
1823 /*
1824 * mp is stored in the fs_context when it is initialized.
1825 * mp is transferred to the superblock on a successful mount,
1826 * but if an error occurs before the transfer we have to free
1827 * it here.
1828 */
1829 if (mp)
1830 xfs_mount_free(mp);
1831}
1832
1833static const struct fs_context_operations xfs_context_ops = {
1834 .parse_param = xfs_fs_parse_param,
1835 .get_tree = xfs_fs_get_tree,
1836 .reconfigure = xfs_fs_reconfigure,
1837 .free = xfs_fs_free,
1838};
1839
1840static int xfs_init_fs_context(
1841 struct fs_context *fc)
1842{
1843 struct xfs_mount *mp;
1844
1845 mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
1846 if (!mp)
1847 return -ENOMEM;
1848
1849 spin_lock_init(&mp->m_sb_lock);
1850 spin_lock_init(&mp->m_agirotor_lock);
1851 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1852 spin_lock_init(&mp->m_perag_lock);
1853 mutex_init(&mp->m_growlock);
1854 INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);
1855 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1856 mp->m_kobj.kobject.kset = xfs_kset;
1857 /*
1858 * We don't create the finobt per-ag space reservation until after log
1859 * recovery, so we must set this to true so that an ifree transaction
1860 * started during log recovery will not depend on space reservations
1861 * for finobt expansion.
1862 */
1863 mp->m_finobt_nores = true;
1864
1865 /*
1866 * These can be overridden by the mount option parsing.
1867 */
1868 mp->m_logbufs = -1;
1869 mp->m_logbsize = -1;
1870 mp->m_allocsize_log = 16; /* 64k */
1871
1872 /*
1873 * Copy binary VFS mount flags we are interested in.
1874 */
1875 if (fc->sb_flags & SB_RDONLY)
1876 mp->m_flags |= XFS_MOUNT_RDONLY;
1877 if (fc->sb_flags & SB_DIRSYNC)
1878 mp->m_flags |= XFS_MOUNT_DIRSYNC;
1879 if (fc->sb_flags & SB_SYNCHRONOUS)
1880 mp->m_flags |= XFS_MOUNT_WSYNC;
1881
1882 fc->s_fs_info = mp;
1883 fc->ops = &xfs_context_ops;
1884
1885 return 0;
1886}
1887
1888static struct file_system_type xfs_fs_type = {
1889 .owner = THIS_MODULE,
1890 .name = "xfs",
1891 .init_fs_context = xfs_init_fs_context,
1892 .parameters = xfs_fs_parameters,
1893 .kill_sb = kill_block_super,
1894 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1895};
1896MODULE_ALIAS_FS("xfs");
1897
1898STATIC int __init
1899xfs_init_zones(void)
1900{
1901 xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket",
1902 sizeof(struct xlog_ticket),
1903 0, 0, NULL);
1904 if (!xfs_log_ticket_zone)
1905 goto out;
1906
1907 xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item",
1908 sizeof(struct xfs_extent_free_item),
1909 0, 0, NULL);
1910 if (!xfs_bmap_free_item_zone)
1911 goto out_destroy_log_ticket_zone;
1912
1913 xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur",
1914 sizeof(struct xfs_btree_cur),
1915 0, 0, NULL);
1916 if (!xfs_btree_cur_zone)
1917 goto out_destroy_bmap_free_item_zone;
1918
1919 xfs_da_state_zone = kmem_cache_create("xfs_da_state",
1920 sizeof(struct xfs_da_state),
1921 0, 0, NULL);
1922 if (!xfs_da_state_zone)
1923 goto out_destroy_btree_cur_zone;
1924
1925 xfs_ifork_zone = kmem_cache_create("xfs_ifork",
1926 sizeof(struct xfs_ifork),
1927 0, 0, NULL);
1928 if (!xfs_ifork_zone)
1929 goto out_destroy_da_state_zone;
1930
1931 xfs_trans_zone = kmem_cache_create("xfs_trans",
1932 sizeof(struct xfs_trans),
1933 0, 0, NULL);
1934 if (!xfs_trans_zone)
1935 goto out_destroy_ifork_zone;
1936
1937
1938 /*
1939 * The size of the zone allocated buf log item is the maximum
1940 * size possible under XFS. This wastes a little bit of memory,
1941 * but it is much faster.
1942 */
1943 xfs_buf_item_zone = kmem_cache_create("xfs_buf_item",
1944 sizeof(struct xfs_buf_log_item),
1945 0, 0, NULL);
1946 if (!xfs_buf_item_zone)
1947 goto out_destroy_trans_zone;
1948
1949 xfs_efd_zone = kmem_cache_create("xfs_efd_item",
1950 (sizeof(struct xfs_efd_log_item) +
1951 (XFS_EFD_MAX_FAST_EXTENTS - 1) *
1952 sizeof(struct xfs_extent)),
1953 0, 0, NULL);
1954 if (!xfs_efd_zone)
1955 goto out_destroy_buf_item_zone;
1956
1957 xfs_efi_zone = kmem_cache_create("xfs_efi_item",
1958 (sizeof(struct xfs_efi_log_item) +
1959 (XFS_EFI_MAX_FAST_EXTENTS - 1) *
1960 sizeof(struct xfs_extent)),
1961 0, 0, NULL);
1962 if (!xfs_efi_zone)
1963 goto out_destroy_efd_zone;
1964
1965 xfs_inode_zone = kmem_cache_create("xfs_inode",
1966 sizeof(struct xfs_inode), 0,
1967 (SLAB_HWCACHE_ALIGN |
1968 SLAB_RECLAIM_ACCOUNT |
1969 SLAB_MEM_SPREAD | SLAB_ACCOUNT),
1970 xfs_fs_inode_init_once);
1971 if (!xfs_inode_zone)
1972 goto out_destroy_efi_zone;
1973
1974 xfs_ili_zone = kmem_cache_create("xfs_ili",
1975 sizeof(struct xfs_inode_log_item), 0,
1976 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
1977 NULL);
1978 if (!xfs_ili_zone)
1979 goto out_destroy_inode_zone;
1980
1981 xfs_icreate_zone = kmem_cache_create("xfs_icr",
1982 sizeof(struct xfs_icreate_item),
1983 0, 0, NULL);
1984 if (!xfs_icreate_zone)
1985 goto out_destroy_ili_zone;
1986
1987 xfs_rud_zone = kmem_cache_create("xfs_rud_item",
1988 sizeof(struct xfs_rud_log_item),
1989 0, 0, NULL);
1990 if (!xfs_rud_zone)
1991 goto out_destroy_icreate_zone;
1992
1993 xfs_rui_zone = kmem_cache_create("xfs_rui_item",
1994 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
1995 0, 0, NULL);
1996 if (!xfs_rui_zone)
1997 goto out_destroy_rud_zone;
1998
1999 xfs_cud_zone = kmem_cache_create("xfs_cud_item",
2000 sizeof(struct xfs_cud_log_item),
2001 0, 0, NULL);
2002 if (!xfs_cud_zone)
2003 goto out_destroy_rui_zone;
2004
2005 xfs_cui_zone = kmem_cache_create("xfs_cui_item",
2006 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
2007 0, 0, NULL);
2008 if (!xfs_cui_zone)
2009 goto out_destroy_cud_zone;
2010
2011 xfs_bud_zone = kmem_cache_create("xfs_bud_item",
2012 sizeof(struct xfs_bud_log_item),
2013 0, 0, NULL);
2014 if (!xfs_bud_zone)
2015 goto out_destroy_cui_zone;
2016
2017 xfs_bui_zone = kmem_cache_create("xfs_bui_item",
2018 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
2019 0, 0, NULL);
2020 if (!xfs_bui_zone)
2021 goto out_destroy_bud_zone;
2022
2023 return 0;
2024
2025 out_destroy_bud_zone:
2026 kmem_cache_destroy(xfs_bud_zone);
2027 out_destroy_cui_zone:
2028 kmem_cache_destroy(xfs_cui_zone);
2029 out_destroy_cud_zone:
2030 kmem_cache_destroy(xfs_cud_zone);
2031 out_destroy_rui_zone:
2032 kmem_cache_destroy(xfs_rui_zone);
2033 out_destroy_rud_zone:
2034 kmem_cache_destroy(xfs_rud_zone);
2035 out_destroy_icreate_zone:
2036 kmem_cache_destroy(xfs_icreate_zone);
2037 out_destroy_ili_zone:
2038 kmem_cache_destroy(xfs_ili_zone);
2039 out_destroy_inode_zone:
2040 kmem_cache_destroy(xfs_inode_zone);
2041 out_destroy_efi_zone:
2042 kmem_cache_destroy(xfs_efi_zone);
2043 out_destroy_efd_zone:
2044 kmem_cache_destroy(xfs_efd_zone);
2045 out_destroy_buf_item_zone:
2046 kmem_cache_destroy(xfs_buf_item_zone);
2047 out_destroy_trans_zone:
2048 kmem_cache_destroy(xfs_trans_zone);
2049 out_destroy_ifork_zone:
2050 kmem_cache_destroy(xfs_ifork_zone);
2051 out_destroy_da_state_zone:
2052 kmem_cache_destroy(xfs_da_state_zone);
2053 out_destroy_btree_cur_zone:
2054 kmem_cache_destroy(xfs_btree_cur_zone);
2055 out_destroy_bmap_free_item_zone:
2056 kmem_cache_destroy(xfs_bmap_free_item_zone);
2057 out_destroy_log_ticket_zone:
2058 kmem_cache_destroy(xfs_log_ticket_zone);
2059 out:
2060 return -ENOMEM;
2061}
2062
2063STATIC void
2064xfs_destroy_zones(void)
2065{
2066 /*
2067 * Make sure all delayed rcu free are flushed before we
2068 * destroy caches.
2069 */
2070 rcu_barrier();
2071 kmem_cache_destroy(xfs_bui_zone);
2072 kmem_cache_destroy(xfs_bud_zone);
2073 kmem_cache_destroy(xfs_cui_zone);
2074 kmem_cache_destroy(xfs_cud_zone);
2075 kmem_cache_destroy(xfs_rui_zone);
2076 kmem_cache_destroy(xfs_rud_zone);
2077 kmem_cache_destroy(xfs_icreate_zone);
2078 kmem_cache_destroy(xfs_ili_zone);
2079 kmem_cache_destroy(xfs_inode_zone);
2080 kmem_cache_destroy(xfs_efi_zone);
2081 kmem_cache_destroy(xfs_efd_zone);
2082 kmem_cache_destroy(xfs_buf_item_zone);
2083 kmem_cache_destroy(xfs_trans_zone);
2084 kmem_cache_destroy(xfs_ifork_zone);
2085 kmem_cache_destroy(xfs_da_state_zone);
2086 kmem_cache_destroy(xfs_btree_cur_zone);
2087 kmem_cache_destroy(xfs_bmap_free_item_zone);
2088 kmem_cache_destroy(xfs_log_ticket_zone);
2089}
2090
2091STATIC int __init
2092xfs_init_workqueues(void)
2093{
2094 /*
2095 * The allocation workqueue can be used in memory reclaim situations
2096 * (writepage path), and parallelism is only limited by the number of
2097 * AGs in all the filesystems mounted. Hence use the default large
2098 * max_active value for this workqueue.
2099 */
2100 xfs_alloc_wq = alloc_workqueue("xfsalloc",
2101 XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0);
2102 if (!xfs_alloc_wq)
2103 return -ENOMEM;
2104
2105 xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND),
2106 0);
2107 if (!xfs_discard_wq)
2108 goto out_free_alloc_wq;
2109
2110 return 0;
2111out_free_alloc_wq:
2112 destroy_workqueue(xfs_alloc_wq);
2113 return -ENOMEM;
2114}
2115
2116STATIC void
2117xfs_destroy_workqueues(void)
2118{
2119 destroy_workqueue(xfs_discard_wq);
2120 destroy_workqueue(xfs_alloc_wq);
2121}
2122
2123STATIC int __init
2124init_xfs_fs(void)
2125{
2126 int error;
2127
2128 xfs_check_ondisk_structs();
2129
2130 printk(KERN_INFO XFS_VERSION_STRING " with "
2131 XFS_BUILD_OPTIONS " enabled\n");
2132
2133 xfs_dir_startup();
2134
2135 error = xfs_init_zones();
2136 if (error)
2137 goto out;
2138
2139 error = xfs_init_workqueues();
2140 if (error)
2141 goto out_destroy_zones;
2142
2143 error = xfs_mru_cache_init();
2144 if (error)
2145 goto out_destroy_wq;
2146
2147 error = xfs_buf_init();
2148 if (error)
2149 goto out_mru_cache_uninit;
2150
2151 error = xfs_init_procfs();
2152 if (error)
2153 goto out_buf_terminate;
2154
2155 error = xfs_sysctl_register();
2156 if (error)
2157 goto out_cleanup_procfs;
2158
2159 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2160 if (!xfs_kset) {
2161 error = -ENOMEM;
2162 goto out_sysctl_unregister;
2163 }
2164
2165 xfsstats.xs_kobj.kobject.kset = xfs_kset;
2166
2167 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2168 if (!xfsstats.xs_stats) {
2169 error = -ENOMEM;
2170 goto out_kset_unregister;
2171 }
2172
2173 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2174 "stats");
2175 if (error)
2176 goto out_free_stats;
2177
2178#ifdef DEBUG
2179 xfs_dbg_kobj.kobject.kset = xfs_kset;
2180 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2181 if (error)
2182 goto out_remove_stats_kobj;
2183#endif
2184
2185 error = xfs_qm_init();
2186 if (error)
2187 goto out_remove_dbg_kobj;
2188
2189 error = register_filesystem(&xfs_fs_type);
2190 if (error)
2191 goto out_qm_exit;
2192 return 0;
2193
2194 out_qm_exit:
2195 xfs_qm_exit();
2196 out_remove_dbg_kobj:
2197#ifdef DEBUG
2198 xfs_sysfs_del(&xfs_dbg_kobj);
2199 out_remove_stats_kobj:
2200#endif
2201 xfs_sysfs_del(&xfsstats.xs_kobj);
2202 out_free_stats:
2203 free_percpu(xfsstats.xs_stats);
2204 out_kset_unregister:
2205 kset_unregister(xfs_kset);
2206 out_sysctl_unregister:
2207 xfs_sysctl_unregister();
2208 out_cleanup_procfs:
2209 xfs_cleanup_procfs();
2210 out_buf_terminate:
2211 xfs_buf_terminate();
2212 out_mru_cache_uninit:
2213 xfs_mru_cache_uninit();
2214 out_destroy_wq:
2215 xfs_destroy_workqueues();
2216 out_destroy_zones:
2217 xfs_destroy_zones();
2218 out:
2219 return error;
2220}
2221
2222STATIC void __exit
2223exit_xfs_fs(void)
2224{
2225 xfs_qm_exit();
2226 unregister_filesystem(&xfs_fs_type);
2227#ifdef DEBUG
2228 xfs_sysfs_del(&xfs_dbg_kobj);
2229#endif
2230 xfs_sysfs_del(&xfsstats.xs_kobj);
2231 free_percpu(xfsstats.xs_stats);
2232 kset_unregister(xfs_kset);
2233 xfs_sysctl_unregister();
2234 xfs_cleanup_procfs();
2235 xfs_buf_terminate();
2236 xfs_mru_cache_uninit();
2237 xfs_destroy_workqueues();
2238 xfs_destroy_zones();
2239 xfs_uuid_table_free();
2240}
2241
2242module_init(init_xfs_fs);
2243module_exit(exit_xfs_fs);
2244
2245MODULE_AUTHOR("Silicon Graphics, Inc.");
2246MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2247MODULE_LICENSE("GPL");