2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
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.
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.
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
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_da_format.h"
29 #include "xfs_inode.h"
30 #include "xfs_btree.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"
38 #include "xfs_log_priv.h"
39 #include "xfs_da_btree.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"
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>
61 static const struct super_operations xfs_super_operations;
62 static kmem_zone_t *xfs_ioend_zone;
63 mempool_t *xfs_ioend_pool;
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
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 */
115 * Table driven mount option parser.
117 * Currently only used for remount, but it will be used for mount
118 * in the future, too.
128 static const match_table_t tokens = {
129 {Opt_barrier, "barrier"},
130 {Opt_nobarrier, "nobarrier"},
131 {Opt_inode64, "inode64"},
132 {Opt_inode32, "inode32"},
138 suffix_kstrtoint(char *s, unsigned int base, int *res)
140 int last, shift_left_factor = 0, _res;
143 last = strlen(value) - 1;
144 if (value[last] == 'K' || value[last] == 'k') {
145 shift_left_factor = 10;
148 if (value[last] == 'M' || value[last] == 'm') {
149 shift_left_factor = 20;
152 if (value[last] == 'G' || value[last] == 'g') {
153 shift_left_factor = 30;
157 if (kstrtoint(s, base, &_res))
159 *res = _res << shift_left_factor;
164 * This function fills in xfs_mount_t fields based on mount args.
165 * Note: the superblock has _not_ yet been read in.
167 * Note that this function leaks the various device name allocations on
168 * failure. The caller takes care of them.
172 struct xfs_mount *mp,
175 struct super_block *sb = mp->m_super;
176 char *this_char, *value;
180 __uint8_t iosizelog = 0;
183 * set up the mount name first so all the errors will refer to the
186 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
189 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
192 * Copy binary VFS mount flags we are interested in.
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;
202 * Set some default flags that could be cleared by the mount option
205 mp->m_flags |= XFS_MOUNT_BARRIER;
206 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
209 * These can be overridden by the mount option parsing.
217 while ((this_char = strsep(&options, ",")) != NULL) {
220 if ((value = strchr(this_char, '=')) != NULL)
223 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
224 if (!value || !*value) {
225 xfs_warn(mp, "%s option requires an argument",
229 if (kstrtoint(value, 10, &mp->m_logbufs))
231 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
232 if (!value || !*value) {
233 xfs_warn(mp, "%s option requires an argument",
237 if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
239 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
240 if (!value || !*value) {
241 xfs_warn(mp, "%s option requires an argument",
245 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
248 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
249 xfs_warn(mp, "%s option not allowed on this system",
252 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
253 if (!value || !*value) {
254 xfs_warn(mp, "%s option requires an argument",
258 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
261 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
262 if (!value || !*value) {
263 xfs_warn(mp, "%s option requires an argument",
267 if (kstrtoint(value, 10, &iosize))
269 iosizelog = ffs(iosize) - 1;
270 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
271 if (!value || !*value) {
272 xfs_warn(mp, "%s option requires an argument",
276 if (suffix_kstrtoint(value, 10, &iosize))
278 iosizelog = ffs(iosize) - 1;
279 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
280 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
281 mp->m_flags |= XFS_MOUNT_GRPID;
282 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
283 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
284 mp->m_flags &= ~XFS_MOUNT_GRPID;
285 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
286 mp->m_flags |= XFS_MOUNT_WSYNC;
287 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
288 mp->m_flags |= XFS_MOUNT_NORECOVERY;
289 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
290 mp->m_flags |= XFS_MOUNT_NOALIGN;
291 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
292 mp->m_flags |= XFS_MOUNT_SWALLOC;
293 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
294 if (!value || !*value) {
295 xfs_warn(mp, "%s option requires an argument",
299 if (kstrtoint(value, 10, &dsunit))
301 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
302 if (!value || !*value) {
303 xfs_warn(mp, "%s option requires an argument",
307 if (kstrtoint(value, 10, &dswidth))
309 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
310 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
311 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
312 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
313 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
314 mp->m_flags |= XFS_MOUNT_NOUUID;
315 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
316 mp->m_flags |= XFS_MOUNT_BARRIER;
317 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
318 mp->m_flags &= ~XFS_MOUNT_BARRIER;
319 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
320 mp->m_flags |= XFS_MOUNT_IKEEP;
321 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
322 mp->m_flags &= ~XFS_MOUNT_IKEEP;
323 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
324 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
325 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
326 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
327 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
328 mp->m_flags |= XFS_MOUNT_ATTR2;
329 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
330 mp->m_flags &= ~XFS_MOUNT_ATTR2;
331 mp->m_flags |= XFS_MOUNT_NOATTR2;
332 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
333 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
334 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
335 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
336 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
337 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
338 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
339 !strcmp(this_char, MNTOPT_UQUOTA) ||
340 !strcmp(this_char, MNTOPT_USRQUOTA)) {
341 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
343 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
344 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
345 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
346 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
347 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
348 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
349 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
351 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
352 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
353 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
354 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
355 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
356 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
358 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
360 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
361 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
363 "delaylog is the default now, option is deprecated.");
364 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
366 "nodelaylog support has been removed, option is deprecated.");
367 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
368 mp->m_flags |= XFS_MOUNT_DISCARD;
369 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
370 mp->m_flags &= ~XFS_MOUNT_DISCARD;
371 } else if (!strcmp(this_char, "ihashsize")) {
373 "ihashsize no longer used, option is deprecated.");
374 } else if (!strcmp(this_char, "osyncisdsync")) {
376 "osyncisdsync has no effect, option is deprecated.");
377 } else if (!strcmp(this_char, "osyncisosync")) {
379 "osyncisosync has no effect, option is deprecated.");
380 } else if (!strcmp(this_char, "irixsgid")) {
382 "irixsgid is now a sysctl(2) variable, option is deprecated.");
384 xfs_warn(mp, "unknown mount option [%s].", this_char);
390 * no recovery flag requires a read-only mount
392 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
393 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
394 xfs_warn(mp, "no-recovery mounts must be read-only.");
398 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
400 "sunit and swidth options incompatible with the noalign option");
404 #ifndef CONFIG_XFS_QUOTA
405 if (XFS_IS_QUOTA_RUNNING(mp)) {
406 xfs_warn(mp, "quota support not available in this kernel.");
411 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
412 xfs_warn(mp, "sunit and swidth must be specified together");
416 if (dsunit && (dswidth % dsunit != 0)) {
418 "stripe width (%d) must be a multiple of the stripe unit (%d)",
424 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
426 * At this point the superblock has not been read
427 * in, therefore we do not know the block size.
428 * Before the mount call ends we will convert
431 mp->m_dalign = dsunit;
432 mp->m_swidth = dswidth;
435 if (mp->m_logbufs != -1 &&
436 mp->m_logbufs != 0 &&
437 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
438 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
439 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
440 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
443 if (mp->m_logbsize != -1 &&
444 mp->m_logbsize != 0 &&
445 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
446 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
447 !is_power_of_2(mp->m_logbsize))) {
449 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
455 if (iosizelog > XFS_MAX_IO_LOG ||
456 iosizelog < XFS_MIN_IO_LOG) {
457 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
458 iosizelog, XFS_MIN_IO_LOG,
463 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
464 mp->m_readio_log = iosizelog;
465 mp->m_writeio_log = iosizelog;
471 struct proc_xfs_info {
478 struct xfs_mount *mp,
481 static struct proc_xfs_info xfs_info_set[] = {
482 /* the few simple ones we can get from the mount struct */
483 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
484 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
485 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
486 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
487 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
488 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
489 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
490 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
491 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
492 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
493 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
496 static struct proc_xfs_info xfs_info_unset[] = {
497 /* the few simple ones we can get from the mount struct */
498 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
499 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
500 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
503 struct proc_xfs_info *xfs_infop;
505 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
506 if (mp->m_flags & xfs_infop->flag)
507 seq_puts(m, xfs_infop->str);
509 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
510 if (!(mp->m_flags & xfs_infop->flag))
511 seq_puts(m, xfs_infop->str);
514 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
515 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
516 (int)(1 << mp->m_writeio_log) >> 10);
518 if (mp->m_logbufs > 0)
519 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
520 if (mp->m_logbsize > 0)
521 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
524 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
526 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
528 if (mp->m_dalign > 0)
529 seq_printf(m, "," MNTOPT_SUNIT "=%d",
530 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
531 if (mp->m_swidth > 0)
532 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
533 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
535 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
536 seq_puts(m, "," MNTOPT_USRQUOTA);
537 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
538 seq_puts(m, "," MNTOPT_UQUOTANOENF);
540 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
541 if (mp->m_qflags & XFS_PQUOTA_ENFD)
542 seq_puts(m, "," MNTOPT_PRJQUOTA);
544 seq_puts(m, "," MNTOPT_PQUOTANOENF);
546 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
547 if (mp->m_qflags & XFS_GQUOTA_ENFD)
548 seq_puts(m, "," MNTOPT_GRPQUOTA);
550 seq_puts(m, "," MNTOPT_GQUOTANOENF);
553 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
554 seq_puts(m, "," MNTOPT_NOQUOTA);
560 unsigned int blockshift)
562 unsigned int pagefactor = 1;
563 unsigned int bitshift = BITS_PER_LONG - 1;
565 /* Figure out maximum filesize, on Linux this can depend on
566 * the filesystem blocksize (on 32 bit platforms).
567 * __block_write_begin does this in an [unsigned] long...
568 * page->index << (PAGE_CACHE_SHIFT - bbits)
569 * So, for page sized blocks (4K on 32 bit platforms),
570 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
571 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
572 * but for smaller blocksizes it is less (bbits = log2 bsize).
573 * Note1: get_block_t takes a long (implicit cast from above)
574 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
575 * can optionally convert the [unsigned] long from above into
576 * an [unsigned] long long.
579 #if BITS_PER_LONG == 32
580 # if defined(CONFIG_LBDAF)
581 ASSERT(sizeof(sector_t) == 8);
582 pagefactor = PAGE_CACHE_SIZE;
583 bitshift = BITS_PER_LONG;
585 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
589 return (((__uint64_t)pagefactor) << bitshift) - 1;
593 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount
594 * because in the growfs case, mp->m_sb.sb_agcount is not updated
595 * yet to the potentially higher ag count.
598 xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount)
600 xfs_agnumber_t index = 0;
601 xfs_agnumber_t maxagi = 0;
602 xfs_sb_t *sbp = &mp->m_sb;
603 xfs_agnumber_t max_metadata;
608 /* Calculate how much should be reserved for inodes to meet
609 * the max inode percentage.
611 if (mp->m_maxicount) {
614 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
616 icount += sbp->sb_agblocks - 1;
617 do_div(icount, sbp->sb_agblocks);
618 max_metadata = icount;
620 max_metadata = agcount;
623 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
625 for (index = 0; index < agcount; index++) {
626 ino = XFS_AGINO_TO_INO(mp, index, agino);
628 if (ino > XFS_MAXINUMBER_32) {
629 pag = xfs_perag_get(mp, index);
630 pag->pagi_inodeok = 0;
631 pag->pagf_metadata = 0;
636 pag = xfs_perag_get(mp, index);
637 pag->pagi_inodeok = 1;
639 if (index < max_metadata)
640 pag->pagf_metadata = 1;
643 mp->m_flags |= (XFS_MOUNT_32BITINODES |
644 XFS_MOUNT_SMALL_INUMS);
650 xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount)
652 xfs_agnumber_t index = 0;
654 for (index = 0; index < agcount; index++) {
655 struct xfs_perag *pag;
657 pag = xfs_perag_get(mp, index);
658 pag->pagi_inodeok = 1;
659 pag->pagf_metadata = 0;
663 /* There is no need for lock protection on m_flags,
664 * the rw_semaphore of the VFS superblock is locked
665 * during mount/umount/remount operations, so this is
666 * enough to avoid concurency on the m_flags field
668 mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
669 XFS_MOUNT_SMALL_INUMS);
677 struct block_device **bdevp)
681 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
683 if (IS_ERR(*bdevp)) {
684 error = PTR_ERR(*bdevp);
685 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
693 struct block_device *bdev)
696 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
700 xfs_blkdev_issue_flush(
701 xfs_buftarg_t *buftarg)
703 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
708 struct xfs_mount *mp)
710 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
711 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
712 xfs_free_buftarg(mp, mp->m_logdev_targp);
713 xfs_blkdev_put(logdev);
715 if (mp->m_rtdev_targp) {
716 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
717 xfs_free_buftarg(mp, mp->m_rtdev_targp);
718 xfs_blkdev_put(rtdev);
720 xfs_free_buftarg(mp, mp->m_ddev_targp);
724 * The file system configurations are:
725 * (1) device (partition) with data and internal log
726 * (2) logical volume with data and log subvolumes.
727 * (3) logical volume with data, log, and realtime subvolumes.
729 * We only have to handle opening the log and realtime volumes here if
730 * they are present. The data subvolume has already been opened by
731 * get_sb_bdev() and is stored in sb->s_bdev.
735 struct xfs_mount *mp)
737 struct block_device *ddev = mp->m_super->s_bdev;
738 struct block_device *logdev = NULL, *rtdev = NULL;
742 * Open real time and log devices - order is important.
745 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
751 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
753 goto out_close_logdev;
755 if (rtdev == ddev || rtdev == logdev) {
757 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
759 goto out_close_rtdev;
764 * Setup xfs_mount buffer target pointers
767 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
768 if (!mp->m_ddev_targp)
769 goto out_close_rtdev;
772 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
773 if (!mp->m_rtdev_targp)
774 goto out_free_ddev_targ;
777 if (logdev && logdev != ddev) {
778 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
779 if (!mp->m_logdev_targp)
780 goto out_free_rtdev_targ;
782 mp->m_logdev_targp = mp->m_ddev_targp;
788 if (mp->m_rtdev_targp)
789 xfs_free_buftarg(mp, mp->m_rtdev_targp);
791 xfs_free_buftarg(mp, mp->m_ddev_targp);
794 xfs_blkdev_put(rtdev);
796 if (logdev && logdev != ddev)
797 xfs_blkdev_put(logdev);
803 * Setup xfs_mount buffer target pointers based on superblock
807 struct xfs_mount *mp)
811 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
815 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
816 unsigned int log_sector_size = BBSIZE;
818 if (xfs_sb_version_hassector(&mp->m_sb))
819 log_sector_size = mp->m_sb.sb_logsectsize;
820 error = xfs_setsize_buftarg(mp->m_logdev_targp,
825 if (mp->m_rtdev_targp) {
826 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
827 mp->m_sb.sb_sectsize);
836 xfs_init_mount_workqueues(
837 struct xfs_mount *mp)
839 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
840 WQ_MEM_RECLAIM, 0, mp->m_fsname);
841 if (!mp->m_data_workqueue)
844 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
845 WQ_MEM_RECLAIM, 0, mp->m_fsname);
846 if (!mp->m_unwritten_workqueue)
847 goto out_destroy_data_iodone_queue;
849 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
850 WQ_MEM_RECLAIM, 0, mp->m_fsname);
851 if (!mp->m_cil_workqueue)
852 goto out_destroy_unwritten;
854 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
856 if (!mp->m_reclaim_workqueue)
857 goto out_destroy_cil;
859 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
861 if (!mp->m_log_workqueue)
862 goto out_destroy_reclaim;
864 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
866 if (!mp->m_eofblocks_workqueue)
867 goto out_destroy_log;
872 destroy_workqueue(mp->m_log_workqueue);
874 destroy_workqueue(mp->m_reclaim_workqueue);
876 destroy_workqueue(mp->m_cil_workqueue);
877 out_destroy_unwritten:
878 destroy_workqueue(mp->m_unwritten_workqueue);
879 out_destroy_data_iodone_queue:
880 destroy_workqueue(mp->m_data_workqueue);
886 xfs_destroy_mount_workqueues(
887 struct xfs_mount *mp)
889 destroy_workqueue(mp->m_eofblocks_workqueue);
890 destroy_workqueue(mp->m_log_workqueue);
891 destroy_workqueue(mp->m_reclaim_workqueue);
892 destroy_workqueue(mp->m_cil_workqueue);
893 destroy_workqueue(mp->m_data_workqueue);
894 destroy_workqueue(mp->m_unwritten_workqueue);
898 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
899 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
900 * for IO to complete so that we effectively throttle multiple callers to the
901 * rate at which IO is completing.
905 struct xfs_mount *mp)
907 struct super_block *sb = mp->m_super;
909 if (down_read_trylock(&sb->s_umount)) {
911 up_read(&sb->s_umount);
915 /* Catch misguided souls that try to use this interface on XFS */
916 STATIC struct inode *
918 struct super_block *sb)
925 * Now that the generic code is guaranteed not to be accessing
926 * the linux inode, we can reclaim the inode.
929 xfs_fs_destroy_inode(
932 struct xfs_inode *ip = XFS_I(inode);
934 trace_xfs_destroy_inode(ip);
936 XFS_STATS_INC(vn_reclaim);
938 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
941 * We should never get here with one of the reclaim flags already set.
943 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
944 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
947 * We always use background reclaim here because even if the
948 * inode is clean, it still may be under IO and hence we have
949 * to take the flush lock. The background reclaim path handles
950 * this more efficiently than we can here, so simply let background
951 * reclaim tear down all inodes.
953 xfs_inode_set_reclaim_tag(ip);
957 * Slab object creation initialisation for the XFS inode.
958 * This covers only the idempotent fields in the XFS inode;
959 * all other fields need to be initialised on allocation
960 * from the slab. This avoids the need to repeatedly initialise
961 * fields in the xfs inode that left in the initialise state
962 * when freeing the inode.
965 xfs_fs_inode_init_once(
968 struct xfs_inode *ip = inode;
970 memset(ip, 0, sizeof(struct xfs_inode));
973 inode_init_once(VFS_I(ip));
976 atomic_set(&ip->i_pincount, 0);
977 spin_lock_init(&ip->i_flags_lock);
979 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
980 "xfsino", ip->i_ino);
987 xfs_inode_t *ip = XFS_I(inode);
989 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
991 trace_xfs_evict_inode(ip);
993 truncate_inode_pages_final(&inode->i_data);
995 XFS_STATS_INC(vn_rele);
996 XFS_STATS_INC(vn_remove);
997 XFS_STATS_DEC(vn_active);
1003 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1004 * serialised against cache hits here via the inode->i_lock and igrab() in
1005 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1006 * racing with us, and it avoids needing to grab a spinlock here for every inode
1007 * we drop the final reference on.
1011 struct inode *inode)
1013 struct xfs_inode *ip = XFS_I(inode);
1015 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1020 struct xfs_mount *mp)
1022 kfree(mp->m_fsname);
1023 kfree(mp->m_rtname);
1024 kfree(mp->m_logname);
1029 struct super_block *sb)
1031 struct xfs_mount *mp = XFS_M(sb);
1033 xfs_filestream_unmount(mp);
1037 xfs_icsb_destroy_counters(mp);
1038 xfs_destroy_mount_workqueues(mp);
1039 xfs_close_devices(mp);
1040 xfs_free_fsname(mp);
1046 struct super_block *sb,
1049 struct xfs_mount *mp = XFS_M(sb);
1052 * Doing anything during the async pass would be counterproductive.
1057 xfs_log_force(mp, XFS_LOG_SYNC);
1060 * The disk must be active because we're syncing.
1061 * We schedule log work now (now that the disk is
1062 * active) instead of later (when it might not be).
1064 flush_delayed_work(&mp->m_log->l_work);
1072 struct dentry *dentry,
1073 struct kstatfs *statp)
1075 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1076 xfs_sb_t *sbp = &mp->m_sb;
1077 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1078 __uint64_t fakeinos, id;
1082 statp->f_type = XFS_SB_MAGIC;
1083 statp->f_namelen = MAXNAMELEN - 1;
1085 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1086 statp->f_fsid.val[0] = (u32)id;
1087 statp->f_fsid.val[1] = (u32)(id >> 32);
1089 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1091 spin_lock(&mp->m_sb_lock);
1092 statp->f_bsize = sbp->sb_blocksize;
1093 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1094 statp->f_blocks = sbp->sb_dblocks - lsize;
1095 statp->f_bfree = statp->f_bavail =
1096 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1097 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1099 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1100 if (mp->m_maxicount)
1101 statp->f_files = min_t(typeof(statp->f_files),
1105 /* make sure statp->f_ffree does not underflow */
1106 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1107 statp->f_ffree = max_t(__int64_t, ffree, 0);
1109 spin_unlock(&mp->m_sb_lock);
1111 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1112 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1113 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1114 xfs_qm_statvfs(ip, statp);
1119 xfs_save_resvblks(struct xfs_mount *mp)
1121 __uint64_t resblks = 0;
1123 mp->m_resblks_save = mp->m_resblks;
1124 xfs_reserve_blocks(mp, &resblks, NULL);
1128 xfs_restore_resvblks(struct xfs_mount *mp)
1132 if (mp->m_resblks_save) {
1133 resblks = mp->m_resblks_save;
1134 mp->m_resblks_save = 0;
1136 resblks = xfs_default_resblks(mp);
1138 xfs_reserve_blocks(mp, &resblks, NULL);
1142 * Trigger writeback of all the dirty metadata in the file system.
1144 * This ensures that the metadata is written to their location on disk rather
1145 * than just existing in transactions in the log. This means after a quiesce
1146 * there is no log replay required to write the inodes to disk - this is the
1147 * primary difference between a sync and a quiesce.
1149 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1150 * it is started again when appropriate.
1154 struct xfs_mount *mp)
1158 /* wait for all modifications to complete */
1159 while (atomic_read(&mp->m_active_trans) > 0)
1162 /* force the log to unpin objects from the now complete transactions */
1163 xfs_log_force(mp, XFS_LOG_SYNC);
1165 /* reclaim inodes to do any IO before the freeze completes */
1166 xfs_reclaim_inodes(mp, 0);
1167 xfs_reclaim_inodes(mp, SYNC_WAIT);
1169 /* Push the superblock and write an unmount record */
1170 error = xfs_log_sbcount(mp);
1172 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1173 "Frozen image may not be consistent.");
1175 * Just warn here till VFS can correctly support
1176 * read-only remount without racing.
1178 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1180 xfs_log_quiesce(mp);
1185 struct super_block *sb,
1189 struct xfs_mount *mp = XFS_M(sb);
1190 xfs_sb_t *sbp = &mp->m_sb;
1191 substring_t args[MAX_OPT_ARGS];
1195 sync_filesystem(sb);
1196 while ((p = strsep(&options, ",")) != NULL) {
1202 token = match_token(p, tokens, args);
1205 mp->m_flags |= XFS_MOUNT_BARRIER;
1208 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1211 mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount);
1214 mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount);
1218 * Logically we would return an error here to prevent
1219 * users from believing they might have changed
1220 * mount options using remount which can't be changed.
1222 * But unfortunately mount(8) adds all options from
1223 * mtab and fstab to the mount arguments in some cases
1224 * so we can't blindly reject options, but have to
1225 * check for each specified option if it actually
1226 * differs from the currently set option and only
1227 * reject it if that's the case.
1229 * Until that is implemented we return success for
1230 * every remount request, and silently ignore all
1231 * options that we can't actually change.
1235 "mount option \"%s\" not supported for remount", p);
1244 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1245 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1248 * If this is the first remount to writeable state we
1249 * might have some superblock changes to update.
1251 if (mp->m_update_flags) {
1252 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1254 xfs_warn(mp, "failed to write sb changes");
1257 mp->m_update_flags = 0;
1261 * Fill out the reserve pool if it is empty. Use the stashed
1262 * value if it is non-zero, otherwise go with the default.
1264 xfs_restore_resvblks(mp);
1265 xfs_log_work_queue(mp);
1269 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1271 * Before we sync the metadata, we need to free up the reserve
1272 * block pool so that the used block count in the superblock on
1273 * disk is correct at the end of the remount. Stash the current
1274 * reserve pool size so that if we get remounted rw, we can
1275 * return it to the same size.
1277 xfs_save_resvblks(mp);
1278 xfs_quiesce_attr(mp);
1279 mp->m_flags |= XFS_MOUNT_RDONLY;
1286 * Second stage of a freeze. The data is already frozen so we only
1287 * need to take care of the metadata. Once that's done write a dummy
1288 * record to dirty the log in case of a crash while frozen.
1292 struct super_block *sb)
1294 struct xfs_mount *mp = XFS_M(sb);
1296 xfs_save_resvblks(mp);
1297 xfs_quiesce_attr(mp);
1298 return xfs_fs_log_dummy(mp);
1303 struct super_block *sb)
1305 struct xfs_mount *mp = XFS_M(sb);
1307 xfs_restore_resvblks(mp);
1308 xfs_log_work_queue(mp);
1313 xfs_fs_show_options(
1315 struct dentry *root)
1317 return xfs_showargs(XFS_M(root->d_sb), m);
1321 * This function fills in xfs_mount_t fields based on mount args.
1322 * Note: the superblock _has_ now been read in.
1326 struct xfs_mount *mp)
1328 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1330 /* Fail a mount where the logbuf is smaller than the log stripe */
1331 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1332 if (mp->m_logbsize <= 0 &&
1333 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1334 mp->m_logbsize = mp->m_sb.sb_logsunit;
1335 } else if (mp->m_logbsize > 0 &&
1336 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1338 "logbuf size must be greater than or equal to log stripe size");
1342 /* Fail a mount if the logbuf is larger than 32K */
1343 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1345 "logbuf size for version 1 logs must be 16K or 32K");
1351 * V5 filesystems always use attr2 format for attributes.
1353 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1354 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1356 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1357 MNTOPT_NOATTR2, MNTOPT_ATTR2);
1362 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1363 * told by noattr2 to turn it off
1365 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1366 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1367 mp->m_flags |= XFS_MOUNT_ATTR2;
1370 * prohibit r/w mounts of read-only filesystems
1372 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1374 "cannot mount a read-only filesystem as read-write");
1378 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1379 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1380 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1382 "Super block does not support project and group quota together");
1391 struct super_block *sb,
1396 struct xfs_mount *mp = NULL;
1397 int flags = 0, error = -ENOMEM;
1399 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1403 spin_lock_init(&mp->m_sb_lock);
1404 mutex_init(&mp->m_growlock);
1405 atomic_set(&mp->m_active_trans, 0);
1406 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1407 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1412 error = xfs_parseargs(mp, (char *)data);
1414 goto out_free_fsname;
1416 sb_min_blocksize(sb, BBSIZE);
1417 sb->s_xattr = xfs_xattr_handlers;
1418 sb->s_export_op = &xfs_export_operations;
1419 #ifdef CONFIG_XFS_QUOTA
1420 sb->s_qcop = &xfs_quotactl_operations;
1422 sb->s_op = &xfs_super_operations;
1425 flags |= XFS_MFSI_QUIET;
1427 error = xfs_open_devices(mp);
1429 goto out_free_fsname;
1431 error = xfs_init_mount_workqueues(mp);
1433 goto out_close_devices;
1435 error = xfs_icsb_init_counters(mp);
1437 goto out_destroy_workqueues;
1439 error = xfs_readsb(mp, flags);
1441 goto out_destroy_counters;
1443 error = xfs_finish_flags(mp);
1447 error = xfs_setup_devices(mp);
1451 error = xfs_filestream_mount(mp);
1456 * we must configure the block size in the superblock before we run the
1457 * full mount process as the mount process can lookup and cache inodes.
1459 sb->s_magic = XFS_SB_MAGIC;
1460 sb->s_blocksize = mp->m_sb.sb_blocksize;
1461 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1462 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1463 sb->s_max_links = XFS_MAXLINK;
1464 sb->s_time_gran = 1;
1465 set_posix_acl_flag(sb);
1467 /* version 5 superblocks support inode version counters. */
1468 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1469 sb->s_flags |= MS_I_VERSION;
1471 error = xfs_mountfs(mp);
1473 goto out_filestream_unmount;
1475 root = igrab(VFS_I(mp->m_rootip));
1480 sb->s_root = d_make_root(root);
1488 out_filestream_unmount:
1489 xfs_filestream_unmount(mp);
1492 out_destroy_counters:
1493 xfs_icsb_destroy_counters(mp);
1494 out_destroy_workqueues:
1495 xfs_destroy_mount_workqueues(mp);
1497 xfs_close_devices(mp);
1499 xfs_free_fsname(mp);
1505 xfs_filestream_unmount(mp);
1510 STATIC struct dentry *
1512 struct file_system_type *fs_type,
1514 const char *dev_name,
1517 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1521 xfs_fs_nr_cached_objects(
1522 struct super_block *sb,
1525 return xfs_reclaim_inodes_count(XFS_M(sb));
1529 xfs_fs_free_cached_objects(
1530 struct super_block *sb,
1534 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1537 static const struct super_operations xfs_super_operations = {
1538 .alloc_inode = xfs_fs_alloc_inode,
1539 .destroy_inode = xfs_fs_destroy_inode,
1540 .evict_inode = xfs_fs_evict_inode,
1541 .drop_inode = xfs_fs_drop_inode,
1542 .put_super = xfs_fs_put_super,
1543 .sync_fs = xfs_fs_sync_fs,
1544 .freeze_fs = xfs_fs_freeze,
1545 .unfreeze_fs = xfs_fs_unfreeze,
1546 .statfs = xfs_fs_statfs,
1547 .remount_fs = xfs_fs_remount,
1548 .show_options = xfs_fs_show_options,
1549 .nr_cached_objects = xfs_fs_nr_cached_objects,
1550 .free_cached_objects = xfs_fs_free_cached_objects,
1553 static struct file_system_type xfs_fs_type = {
1554 .owner = THIS_MODULE,
1556 .mount = xfs_fs_mount,
1557 .kill_sb = kill_block_super,
1558 .fs_flags = FS_REQUIRES_DEV,
1560 MODULE_ALIAS_FS("xfs");
1563 xfs_init_zones(void)
1566 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1567 if (!xfs_ioend_zone)
1570 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1572 if (!xfs_ioend_pool)
1573 goto out_destroy_ioend_zone;
1575 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1577 if (!xfs_log_ticket_zone)
1578 goto out_destroy_ioend_pool;
1580 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1581 "xfs_bmap_free_item");
1582 if (!xfs_bmap_free_item_zone)
1583 goto out_destroy_log_ticket_zone;
1585 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1587 if (!xfs_btree_cur_zone)
1588 goto out_destroy_bmap_free_item_zone;
1590 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1592 if (!xfs_da_state_zone)
1593 goto out_destroy_btree_cur_zone;
1595 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1596 if (!xfs_ifork_zone)
1597 goto out_destroy_da_state_zone;
1599 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1600 if (!xfs_trans_zone)
1601 goto out_destroy_ifork_zone;
1603 xfs_log_item_desc_zone =
1604 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1605 "xfs_log_item_desc");
1606 if (!xfs_log_item_desc_zone)
1607 goto out_destroy_trans_zone;
1610 * The size of the zone allocated buf log item is the maximum
1611 * size possible under XFS. This wastes a little bit of memory,
1612 * but it is much faster.
1614 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1616 if (!xfs_buf_item_zone)
1617 goto out_destroy_log_item_desc_zone;
1619 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1620 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1621 sizeof(xfs_extent_t))), "xfs_efd_item");
1623 goto out_destroy_buf_item_zone;
1625 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1626 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1627 sizeof(xfs_extent_t))), "xfs_efi_item");
1629 goto out_destroy_efd_zone;
1632 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1633 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1634 xfs_fs_inode_init_once);
1635 if (!xfs_inode_zone)
1636 goto out_destroy_efi_zone;
1639 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1640 KM_ZONE_SPREAD, NULL);
1642 goto out_destroy_inode_zone;
1643 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1645 if (!xfs_icreate_zone)
1646 goto out_destroy_ili_zone;
1650 out_destroy_ili_zone:
1651 kmem_zone_destroy(xfs_ili_zone);
1652 out_destroy_inode_zone:
1653 kmem_zone_destroy(xfs_inode_zone);
1654 out_destroy_efi_zone:
1655 kmem_zone_destroy(xfs_efi_zone);
1656 out_destroy_efd_zone:
1657 kmem_zone_destroy(xfs_efd_zone);
1658 out_destroy_buf_item_zone:
1659 kmem_zone_destroy(xfs_buf_item_zone);
1660 out_destroy_log_item_desc_zone:
1661 kmem_zone_destroy(xfs_log_item_desc_zone);
1662 out_destroy_trans_zone:
1663 kmem_zone_destroy(xfs_trans_zone);
1664 out_destroy_ifork_zone:
1665 kmem_zone_destroy(xfs_ifork_zone);
1666 out_destroy_da_state_zone:
1667 kmem_zone_destroy(xfs_da_state_zone);
1668 out_destroy_btree_cur_zone:
1669 kmem_zone_destroy(xfs_btree_cur_zone);
1670 out_destroy_bmap_free_item_zone:
1671 kmem_zone_destroy(xfs_bmap_free_item_zone);
1672 out_destroy_log_ticket_zone:
1673 kmem_zone_destroy(xfs_log_ticket_zone);
1674 out_destroy_ioend_pool:
1675 mempool_destroy(xfs_ioend_pool);
1676 out_destroy_ioend_zone:
1677 kmem_zone_destroy(xfs_ioend_zone);
1683 xfs_destroy_zones(void)
1686 * Make sure all delayed rcu free are flushed before we
1690 kmem_zone_destroy(xfs_icreate_zone);
1691 kmem_zone_destroy(xfs_ili_zone);
1692 kmem_zone_destroy(xfs_inode_zone);
1693 kmem_zone_destroy(xfs_efi_zone);
1694 kmem_zone_destroy(xfs_efd_zone);
1695 kmem_zone_destroy(xfs_buf_item_zone);
1696 kmem_zone_destroy(xfs_log_item_desc_zone);
1697 kmem_zone_destroy(xfs_trans_zone);
1698 kmem_zone_destroy(xfs_ifork_zone);
1699 kmem_zone_destroy(xfs_da_state_zone);
1700 kmem_zone_destroy(xfs_btree_cur_zone);
1701 kmem_zone_destroy(xfs_bmap_free_item_zone);
1702 kmem_zone_destroy(xfs_log_ticket_zone);
1703 mempool_destroy(xfs_ioend_pool);
1704 kmem_zone_destroy(xfs_ioend_zone);
1709 xfs_init_workqueues(void)
1712 * The allocation workqueue can be used in memory reclaim situations
1713 * (writepage path), and parallelism is only limited by the number of
1714 * AGs in all the filesystems mounted. Hence use the default large
1715 * max_active value for this workqueue.
1717 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
1725 xfs_destroy_workqueues(void)
1727 destroy_workqueue(xfs_alloc_wq);
1735 printk(KERN_INFO XFS_VERSION_STRING " with "
1736 XFS_BUILD_OPTIONS " enabled\n");
1740 error = xfs_init_zones();
1744 error = xfs_init_workqueues();
1746 goto out_destroy_zones;
1748 error = xfs_mru_cache_init();
1750 goto out_destroy_wq;
1752 error = xfs_buf_init();
1754 goto out_mru_cache_uninit;
1756 error = xfs_init_procfs();
1758 goto out_buf_terminate;
1760 error = xfs_sysctl_register();
1762 goto out_cleanup_procfs;
1764 error = xfs_qm_init();
1766 goto out_sysctl_unregister;
1768 error = register_filesystem(&xfs_fs_type);
1775 out_sysctl_unregister:
1776 xfs_sysctl_unregister();
1778 xfs_cleanup_procfs();
1780 xfs_buf_terminate();
1781 out_mru_cache_uninit:
1782 xfs_mru_cache_uninit();
1784 xfs_destroy_workqueues();
1786 xfs_destroy_zones();
1795 unregister_filesystem(&xfs_fs_type);
1796 xfs_sysctl_unregister();
1797 xfs_cleanup_procfs();
1798 xfs_buf_terminate();
1799 xfs_mru_cache_uninit();
1800 xfs_destroy_workqueues();
1801 xfs_destroy_zones();
1804 module_init(init_xfs_fs);
1805 module_exit(exit_xfs_fs);
1807 MODULE_AUTHOR("Silicon Graphics, Inc.");
1808 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1809 MODULE_LICENSE("GPL");