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"
25 #include "xfs_mount.h"
26 #include "xfs_da_format.h"
27 #include "xfs_inode.h"
28 #include "xfs_btree.h"
30 #include "xfs_alloc.h"
31 #include "xfs_error.h"
32 #include "xfs_fsops.h"
33 #include "xfs_trans.h"
34 #include "xfs_buf_item.h"
36 #include "xfs_log_priv.h"
37 #include "xfs_da_btree.h"
39 #include "xfs_extfree_item.h"
40 #include "xfs_mru_cache.h"
41 #include "xfs_inode_item.h"
42 #include "xfs_icache.h"
43 #include "xfs_trace.h"
44 #include "xfs_icreate_item.h"
45 #include "xfs_filestream.h"
46 #include "xfs_quota.h"
47 #include "xfs_sysfs.h"
49 #include <linux/namei.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/mount.h>
53 #include <linux/mempool.h>
54 #include <linux/writeback.h>
55 #include <linux/kthread.h>
56 #include <linux/freezer.h>
57 #include <linux/parser.h>
59 static const struct super_operations xfs_super_operations;
60 static kmem_zone_t *xfs_ioend_zone;
61 mempool_t *xfs_ioend_pool;
63 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
65 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
68 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
69 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
70 #define MNTOPT_LOGDEV "logdev" /* log device */
71 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
72 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
73 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
74 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
75 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
76 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
77 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
78 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
79 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
80 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
81 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
82 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
83 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
84 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
85 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
86 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
87 * unwritten extent conversion */
88 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
89 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
90 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
91 * XFS_MAXINUMBER_32 */
92 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
93 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
94 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
95 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
97 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
98 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
99 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
100 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
101 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
102 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
103 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
104 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
105 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
106 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
107 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
108 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
109 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
110 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
111 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
112 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
113 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
115 #define MNTOPT_DAX "dax" /* Enable direct access to bdev pages */
118 * Table driven mount option parser.
120 * Currently only used for remount, but it will be used for mount
121 * in the future, too.
131 static const match_table_t tokens = {
132 {Opt_barrier, "barrier"},
133 {Opt_nobarrier, "nobarrier"},
134 {Opt_inode64, "inode64"},
135 {Opt_inode32, "inode32"},
141 suffix_kstrtoint(char *s, unsigned int base, int *res)
143 int last, shift_left_factor = 0, _res;
146 last = strlen(value) - 1;
147 if (value[last] == 'K' || value[last] == 'k') {
148 shift_left_factor = 10;
151 if (value[last] == 'M' || value[last] == 'm') {
152 shift_left_factor = 20;
155 if (value[last] == 'G' || value[last] == 'g') {
156 shift_left_factor = 30;
160 if (kstrtoint(s, base, &_res))
162 *res = _res << shift_left_factor;
167 * This function fills in xfs_mount_t fields based on mount args.
168 * Note: the superblock has _not_ yet been read in.
170 * Note that this function leaks the various device name allocations on
171 * failure. The caller takes care of them.
175 struct xfs_mount *mp,
178 struct super_block *sb = mp->m_super;
179 char *this_char, *value;
183 __uint8_t iosizelog = 0;
186 * set up the mount name first so all the errors will refer to the
189 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
192 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
195 * Copy binary VFS mount flags we are interested in.
197 if (sb->s_flags & MS_RDONLY)
198 mp->m_flags |= XFS_MOUNT_RDONLY;
199 if (sb->s_flags & MS_DIRSYNC)
200 mp->m_flags |= XFS_MOUNT_DIRSYNC;
201 if (sb->s_flags & MS_SYNCHRONOUS)
202 mp->m_flags |= XFS_MOUNT_WSYNC;
205 * Set some default flags that could be cleared by the mount option
208 mp->m_flags |= XFS_MOUNT_BARRIER;
209 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
212 * These can be overridden by the mount option parsing.
220 while ((this_char = strsep(&options, ",")) != NULL) {
223 if ((value = strchr(this_char, '=')) != NULL)
226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
227 if (!value || !*value) {
228 xfs_warn(mp, "%s option requires an argument",
232 if (kstrtoint(value, 10, &mp->m_logbufs))
234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
235 if (!value || !*value) {
236 xfs_warn(mp, "%s option requires an argument",
240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
243 if (!value || !*value) {
244 xfs_warn(mp, "%s option requires an argument",
248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
251 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
252 xfs_warn(mp, "%s option not allowed on this system",
255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
256 if (!value || !*value) {
257 xfs_warn(mp, "%s option requires an argument",
261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
264 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE) ||
265 !strcmp(this_char, MNTOPT_BIOSIZE)) {
266 if (!value || !*value) {
267 xfs_warn(mp, "%s option requires an argument",
271 if (suffix_kstrtoint(value, 10, &iosize))
273 iosizelog = ffs(iosize) - 1;
274 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
275 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
276 mp->m_flags |= XFS_MOUNT_GRPID;
277 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
278 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
279 mp->m_flags &= ~XFS_MOUNT_GRPID;
280 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
281 mp->m_flags |= XFS_MOUNT_WSYNC;
282 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
283 mp->m_flags |= XFS_MOUNT_NORECOVERY;
284 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
285 mp->m_flags |= XFS_MOUNT_NOALIGN;
286 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
287 mp->m_flags |= XFS_MOUNT_SWALLOC;
288 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
289 if (!value || !*value) {
290 xfs_warn(mp, "%s option requires an argument",
294 if (kstrtoint(value, 10, &dsunit))
296 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
297 if (!value || !*value) {
298 xfs_warn(mp, "%s option requires an argument",
302 if (kstrtoint(value, 10, &dswidth))
304 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
305 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
306 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
307 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
308 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
309 mp->m_flags |= XFS_MOUNT_NOUUID;
310 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
311 mp->m_flags |= XFS_MOUNT_BARRIER;
312 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
313 mp->m_flags &= ~XFS_MOUNT_BARRIER;
314 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
315 mp->m_flags |= XFS_MOUNT_IKEEP;
316 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
317 mp->m_flags &= ~XFS_MOUNT_IKEEP;
318 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
319 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
320 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
321 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
322 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
323 mp->m_flags |= XFS_MOUNT_ATTR2;
324 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
325 mp->m_flags &= ~XFS_MOUNT_ATTR2;
326 mp->m_flags |= XFS_MOUNT_NOATTR2;
327 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
328 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
329 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
330 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
331 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
332 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
333 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
334 !strcmp(this_char, MNTOPT_UQUOTA) ||
335 !strcmp(this_char, MNTOPT_USRQUOTA)) {
336 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
338 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
339 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
340 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
341 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
342 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
343 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
344 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
346 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
347 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
348 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
349 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
350 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
351 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
353 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
354 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
355 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
356 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
357 mp->m_flags |= XFS_MOUNT_DISCARD;
358 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
359 mp->m_flags &= ~XFS_MOUNT_DISCARD;
361 } else if (!strcmp(this_char, MNTOPT_DAX)) {
362 mp->m_flags |= XFS_MOUNT_DAX;
365 xfs_warn(mp, "unknown mount option [%s].", this_char);
371 * no recovery flag requires a read-only mount
373 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
374 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
375 xfs_warn(mp, "no-recovery mounts must be read-only.");
379 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
381 "sunit and swidth options incompatible with the noalign option");
385 #ifndef CONFIG_XFS_QUOTA
386 if (XFS_IS_QUOTA_RUNNING(mp)) {
387 xfs_warn(mp, "quota support not available in this kernel.");
392 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
393 xfs_warn(mp, "sunit and swidth must be specified together");
397 if (dsunit && (dswidth % dsunit != 0)) {
399 "stripe width (%d) must be a multiple of the stripe unit (%d)",
405 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
407 * At this point the superblock has not been read
408 * in, therefore we do not know the block size.
409 * Before the mount call ends we will convert
412 mp->m_dalign = dsunit;
413 mp->m_swidth = dswidth;
416 if (mp->m_logbufs != -1 &&
417 mp->m_logbufs != 0 &&
418 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
419 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
420 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
421 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
424 if (mp->m_logbsize != -1 &&
425 mp->m_logbsize != 0 &&
426 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
427 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
428 !is_power_of_2(mp->m_logbsize))) {
430 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
436 if (iosizelog > XFS_MAX_IO_LOG ||
437 iosizelog < XFS_MIN_IO_LOG) {
438 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
439 iosizelog, XFS_MIN_IO_LOG,
444 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
445 mp->m_readio_log = iosizelog;
446 mp->m_writeio_log = iosizelog;
452 struct proc_xfs_info {
459 struct xfs_mount *mp,
462 static struct proc_xfs_info xfs_info_set[] = {
463 /* the few simple ones we can get from the mount struct */
464 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
465 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
466 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
467 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
468 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
469 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
470 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
471 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
472 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
473 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
474 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
475 { XFS_MOUNT_DAX, "," MNTOPT_DAX },
478 static struct proc_xfs_info xfs_info_unset[] = {
479 /* the few simple ones we can get from the mount struct */
480 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
481 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
482 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
485 struct proc_xfs_info *xfs_infop;
487 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
488 if (mp->m_flags & xfs_infop->flag)
489 seq_puts(m, xfs_infop->str);
491 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
492 if (!(mp->m_flags & xfs_infop->flag))
493 seq_puts(m, xfs_infop->str);
496 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
497 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
498 (int)(1 << mp->m_writeio_log) >> 10);
500 if (mp->m_logbufs > 0)
501 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
502 if (mp->m_logbsize > 0)
503 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
506 seq_show_option(m, MNTOPT_LOGDEV, mp->m_logname);
508 seq_show_option(m, MNTOPT_RTDEV, mp->m_rtname);
510 if (mp->m_dalign > 0)
511 seq_printf(m, "," MNTOPT_SUNIT "=%d",
512 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
513 if (mp->m_swidth > 0)
514 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
515 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
517 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
518 seq_puts(m, "," MNTOPT_USRQUOTA);
519 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
520 seq_puts(m, "," MNTOPT_UQUOTANOENF);
522 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
523 if (mp->m_qflags & XFS_PQUOTA_ENFD)
524 seq_puts(m, "," MNTOPT_PRJQUOTA);
526 seq_puts(m, "," MNTOPT_PQUOTANOENF);
528 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
529 if (mp->m_qflags & XFS_GQUOTA_ENFD)
530 seq_puts(m, "," MNTOPT_GRPQUOTA);
532 seq_puts(m, "," MNTOPT_GQUOTANOENF);
535 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
536 seq_puts(m, "," MNTOPT_NOQUOTA);
542 unsigned int blockshift)
544 unsigned int pagefactor = 1;
545 unsigned int bitshift = BITS_PER_LONG - 1;
547 /* Figure out maximum filesize, on Linux this can depend on
548 * the filesystem blocksize (on 32 bit platforms).
549 * __block_write_begin does this in an [unsigned] long...
550 * page->index << (PAGE_CACHE_SHIFT - bbits)
551 * So, for page sized blocks (4K on 32 bit platforms),
552 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
553 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
554 * but for smaller blocksizes it is less (bbits = log2 bsize).
555 * Note1: get_block_t takes a long (implicit cast from above)
556 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
557 * can optionally convert the [unsigned] long from above into
558 * an [unsigned] long long.
561 #if BITS_PER_LONG == 32
562 # if defined(CONFIG_LBDAF)
563 ASSERT(sizeof(sector_t) == 8);
564 pagefactor = PAGE_CACHE_SIZE;
565 bitshift = BITS_PER_LONG;
567 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
571 return (((__uint64_t)pagefactor) << bitshift) - 1;
575 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount
576 * because in the growfs case, mp->m_sb.sb_agcount is not updated
577 * yet to the potentially higher ag count.
580 xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount)
582 xfs_agnumber_t index = 0;
583 xfs_agnumber_t maxagi = 0;
584 xfs_sb_t *sbp = &mp->m_sb;
585 xfs_agnumber_t max_metadata;
590 /* Calculate how much should be reserved for inodes to meet
591 * the max inode percentage.
593 if (mp->m_maxicount) {
596 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
598 icount += sbp->sb_agblocks - 1;
599 do_div(icount, sbp->sb_agblocks);
600 max_metadata = icount;
602 max_metadata = agcount;
605 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
607 for (index = 0; index < agcount; index++) {
608 ino = XFS_AGINO_TO_INO(mp, index, agino);
610 if (ino > XFS_MAXINUMBER_32) {
611 pag = xfs_perag_get(mp, index);
612 pag->pagi_inodeok = 0;
613 pag->pagf_metadata = 0;
618 pag = xfs_perag_get(mp, index);
619 pag->pagi_inodeok = 1;
621 if (index < max_metadata)
622 pag->pagf_metadata = 1;
625 mp->m_flags |= (XFS_MOUNT_32BITINODES |
626 XFS_MOUNT_SMALL_INUMS);
632 xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount)
634 xfs_agnumber_t index = 0;
636 for (index = 0; index < agcount; index++) {
637 struct xfs_perag *pag;
639 pag = xfs_perag_get(mp, index);
640 pag->pagi_inodeok = 1;
641 pag->pagf_metadata = 0;
645 /* There is no need for lock protection on m_flags,
646 * the rw_semaphore of the VFS superblock is locked
647 * during mount/umount/remount operations, so this is
648 * enough to avoid concurency on the m_flags field
650 mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
651 XFS_MOUNT_SMALL_INUMS);
659 struct block_device **bdevp)
663 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
665 if (IS_ERR(*bdevp)) {
666 error = PTR_ERR(*bdevp);
667 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
675 struct block_device *bdev)
678 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
682 xfs_blkdev_issue_flush(
683 xfs_buftarg_t *buftarg)
685 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
690 struct xfs_mount *mp)
692 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
693 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
694 xfs_free_buftarg(mp, mp->m_logdev_targp);
695 xfs_blkdev_put(logdev);
697 if (mp->m_rtdev_targp) {
698 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
699 xfs_free_buftarg(mp, mp->m_rtdev_targp);
700 xfs_blkdev_put(rtdev);
702 xfs_free_buftarg(mp, mp->m_ddev_targp);
706 * The file system configurations are:
707 * (1) device (partition) with data and internal log
708 * (2) logical volume with data and log subvolumes.
709 * (3) logical volume with data, log, and realtime subvolumes.
711 * We only have to handle opening the log and realtime volumes here if
712 * they are present. The data subvolume has already been opened by
713 * get_sb_bdev() and is stored in sb->s_bdev.
717 struct xfs_mount *mp)
719 struct block_device *ddev = mp->m_super->s_bdev;
720 struct block_device *logdev = NULL, *rtdev = NULL;
724 * Open real time and log devices - order is important.
727 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
733 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
735 goto out_close_logdev;
737 if (rtdev == ddev || rtdev == logdev) {
739 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
741 goto out_close_rtdev;
746 * Setup xfs_mount buffer target pointers
749 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
750 if (!mp->m_ddev_targp)
751 goto out_close_rtdev;
754 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
755 if (!mp->m_rtdev_targp)
756 goto out_free_ddev_targ;
759 if (logdev && logdev != ddev) {
760 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
761 if (!mp->m_logdev_targp)
762 goto out_free_rtdev_targ;
764 mp->m_logdev_targp = mp->m_ddev_targp;
770 if (mp->m_rtdev_targp)
771 xfs_free_buftarg(mp, mp->m_rtdev_targp);
773 xfs_free_buftarg(mp, mp->m_ddev_targp);
775 xfs_blkdev_put(rtdev);
777 if (logdev && logdev != ddev)
778 xfs_blkdev_put(logdev);
784 * Setup xfs_mount buffer target pointers based on superblock
788 struct xfs_mount *mp)
792 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
796 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
797 unsigned int log_sector_size = BBSIZE;
799 if (xfs_sb_version_hassector(&mp->m_sb))
800 log_sector_size = mp->m_sb.sb_logsectsize;
801 error = xfs_setsize_buftarg(mp->m_logdev_targp,
806 if (mp->m_rtdev_targp) {
807 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
808 mp->m_sb.sb_sectsize);
817 xfs_init_mount_workqueues(
818 struct xfs_mount *mp)
820 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
821 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
822 if (!mp->m_buf_workqueue)
825 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
826 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
827 if (!mp->m_data_workqueue)
828 goto out_destroy_buf;
830 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
831 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
832 if (!mp->m_unwritten_workqueue)
833 goto out_destroy_data_iodone_queue;
835 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
836 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
837 if (!mp->m_cil_workqueue)
838 goto out_destroy_unwritten;
840 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
841 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
842 if (!mp->m_reclaim_workqueue)
843 goto out_destroy_cil;
845 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
846 WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
848 if (!mp->m_log_workqueue)
849 goto out_destroy_reclaim;
851 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
852 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
853 if (!mp->m_eofblocks_workqueue)
854 goto out_destroy_log;
859 destroy_workqueue(mp->m_log_workqueue);
861 destroy_workqueue(mp->m_reclaim_workqueue);
863 destroy_workqueue(mp->m_cil_workqueue);
864 out_destroy_unwritten:
865 destroy_workqueue(mp->m_unwritten_workqueue);
866 out_destroy_data_iodone_queue:
867 destroy_workqueue(mp->m_data_workqueue);
869 destroy_workqueue(mp->m_buf_workqueue);
875 xfs_destroy_mount_workqueues(
876 struct xfs_mount *mp)
878 destroy_workqueue(mp->m_eofblocks_workqueue);
879 destroy_workqueue(mp->m_log_workqueue);
880 destroy_workqueue(mp->m_reclaim_workqueue);
881 destroy_workqueue(mp->m_cil_workqueue);
882 destroy_workqueue(mp->m_data_workqueue);
883 destroy_workqueue(mp->m_unwritten_workqueue);
884 destroy_workqueue(mp->m_buf_workqueue);
888 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
889 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
890 * for IO to complete so that we effectively throttle multiple callers to the
891 * rate at which IO is completing.
895 struct xfs_mount *mp)
897 struct super_block *sb = mp->m_super;
899 if (down_read_trylock(&sb->s_umount)) {
901 up_read(&sb->s_umount);
905 /* Catch misguided souls that try to use this interface on XFS */
906 STATIC struct inode *
908 struct super_block *sb)
915 * Now that the generic code is guaranteed not to be accessing
916 * the linux inode, we can reclaim the inode.
919 xfs_fs_destroy_inode(
922 struct xfs_inode *ip = XFS_I(inode);
924 trace_xfs_destroy_inode(ip);
926 XFS_STATS_INC(ip->i_mount, vn_reclaim);
928 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
931 * We should never get here with one of the reclaim flags already set.
933 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
934 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
937 * We always use background reclaim here because even if the
938 * inode is clean, it still may be under IO and hence we have
939 * to take the flush lock. The background reclaim path handles
940 * this more efficiently than we can here, so simply let background
941 * reclaim tear down all inodes.
943 xfs_inode_set_reclaim_tag(ip);
947 * Slab object creation initialisation for the XFS inode.
948 * This covers only the idempotent fields in the XFS inode;
949 * all other fields need to be initialised on allocation
950 * from the slab. This avoids the need to repeatedly initialise
951 * fields in the xfs inode that left in the initialise state
952 * when freeing the inode.
955 xfs_fs_inode_init_once(
958 struct xfs_inode *ip = inode;
960 memset(ip, 0, sizeof(struct xfs_inode));
963 inode_init_once(VFS_I(ip));
966 atomic_set(&ip->i_pincount, 0);
967 spin_lock_init(&ip->i_flags_lock);
969 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
970 "xfsino", ip->i_ino);
971 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
972 "xfsino", ip->i_ino);
979 xfs_inode_t *ip = XFS_I(inode);
981 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
983 trace_xfs_evict_inode(ip);
985 truncate_inode_pages_final(&inode->i_data);
987 XFS_STATS_INC(ip->i_mount, vn_rele);
988 XFS_STATS_INC(ip->i_mount, vn_remove);
994 * We do an unlocked check for XFS_IDONTCACHE here because we are already
995 * serialised against cache hits here via the inode->i_lock and igrab() in
996 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
997 * racing with us, and it avoids needing to grab a spinlock here for every inode
998 * we drop the final reference on.
1002 struct inode *inode)
1004 struct xfs_inode *ip = XFS_I(inode);
1006 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1011 struct xfs_mount *mp)
1013 kfree(mp->m_fsname);
1014 kfree(mp->m_rtname);
1015 kfree(mp->m_logname);
1020 struct super_block *sb,
1023 struct xfs_mount *mp = XFS_M(sb);
1026 * Doing anything during the async pass would be counterproductive.
1031 xfs_log_force(mp, XFS_LOG_SYNC);
1034 * The disk must be active because we're syncing.
1035 * We schedule log work now (now that the disk is
1036 * active) instead of later (when it might not be).
1038 flush_delayed_work(&mp->m_log->l_work);
1046 struct dentry *dentry,
1047 struct kstatfs *statp)
1049 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1050 xfs_sb_t *sbp = &mp->m_sb;
1051 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1052 __uint64_t fakeinos, id;
1055 __uint64_t fdblocks;
1059 statp->f_type = XFS_SB_MAGIC;
1060 statp->f_namelen = MAXNAMELEN - 1;
1062 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1063 statp->f_fsid.val[0] = (u32)id;
1064 statp->f_fsid.val[1] = (u32)(id >> 32);
1066 icount = percpu_counter_sum(&mp->m_icount);
1067 ifree = percpu_counter_sum(&mp->m_ifree);
1068 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
1070 spin_lock(&mp->m_sb_lock);
1071 statp->f_bsize = sbp->sb_blocksize;
1072 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1073 statp->f_blocks = sbp->sb_dblocks - lsize;
1074 spin_unlock(&mp->m_sb_lock);
1076 statp->f_bfree = fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1077 statp->f_bavail = statp->f_bfree;
1079 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1080 statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1081 if (mp->m_maxicount)
1082 statp->f_files = min_t(typeof(statp->f_files),
1086 /* If sb_icount overshot maxicount, report actual allocation */
1087 statp->f_files = max_t(typeof(statp->f_files),
1091 /* make sure statp->f_ffree does not underflow */
1092 ffree = statp->f_files - (icount - ifree);
1093 statp->f_ffree = max_t(__int64_t, ffree, 0);
1096 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1097 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1098 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1099 xfs_qm_statvfs(ip, statp);
1104 xfs_save_resvblks(struct xfs_mount *mp)
1106 __uint64_t resblks = 0;
1108 mp->m_resblks_save = mp->m_resblks;
1109 xfs_reserve_blocks(mp, &resblks, NULL);
1113 xfs_restore_resvblks(struct xfs_mount *mp)
1117 if (mp->m_resblks_save) {
1118 resblks = mp->m_resblks_save;
1119 mp->m_resblks_save = 0;
1121 resblks = xfs_default_resblks(mp);
1123 xfs_reserve_blocks(mp, &resblks, NULL);
1127 * Trigger writeback of all the dirty metadata in the file system.
1129 * This ensures that the metadata is written to their location on disk rather
1130 * than just existing in transactions in the log. This means after a quiesce
1131 * there is no log replay required to write the inodes to disk - this is the
1132 * primary difference between a sync and a quiesce.
1134 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1135 * it is started again when appropriate.
1139 struct xfs_mount *mp)
1143 /* wait for all modifications to complete */
1144 while (atomic_read(&mp->m_active_trans) > 0)
1147 /* force the log to unpin objects from the now complete transactions */
1148 xfs_log_force(mp, XFS_LOG_SYNC);
1150 /* reclaim inodes to do any IO before the freeze completes */
1151 xfs_reclaim_inodes(mp, 0);
1152 xfs_reclaim_inodes(mp, SYNC_WAIT);
1154 /* Push the superblock and write an unmount record */
1155 error = xfs_log_sbcount(mp);
1157 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1158 "Frozen image may not be consistent.");
1160 * Just warn here till VFS can correctly support
1161 * read-only remount without racing.
1163 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1165 xfs_log_quiesce(mp);
1170 struct super_block *sb,
1174 struct xfs_mount *mp = XFS_M(sb);
1175 xfs_sb_t *sbp = &mp->m_sb;
1176 substring_t args[MAX_OPT_ARGS];
1180 sync_filesystem(sb);
1181 while ((p = strsep(&options, ",")) != NULL) {
1187 token = match_token(p, tokens, args);
1190 mp->m_flags |= XFS_MOUNT_BARRIER;
1193 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1196 mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount);
1199 mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount);
1203 * Logically we would return an error here to prevent
1204 * users from believing they might have changed
1205 * mount options using remount which can't be changed.
1207 * But unfortunately mount(8) adds all options from
1208 * mtab and fstab to the mount arguments in some cases
1209 * so we can't blindly reject options, but have to
1210 * check for each specified option if it actually
1211 * differs from the currently set option and only
1212 * reject it if that's the case.
1214 * Until that is implemented we return success for
1215 * every remount request, and silently ignore all
1216 * options that we can't actually change.
1220 "mount option \"%s\" not supported for remount", p);
1229 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1230 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1232 "ro->rw transition prohibited on norecovery mount");
1236 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1239 * If this is the first remount to writeable state we
1240 * might have some superblock changes to update.
1242 if (mp->m_update_sb) {
1243 error = xfs_sync_sb(mp, false);
1245 xfs_warn(mp, "failed to write sb changes");
1248 mp->m_update_sb = false;
1252 * Fill out the reserve pool if it is empty. Use the stashed
1253 * value if it is non-zero, otherwise go with the default.
1255 xfs_restore_resvblks(mp);
1256 xfs_log_work_queue(mp);
1260 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1262 * Before we sync the metadata, we need to free up the reserve
1263 * block pool so that the used block count in the superblock on
1264 * disk is correct at the end of the remount. Stash the current
1265 * reserve pool size so that if we get remounted rw, we can
1266 * return it to the same size.
1268 xfs_save_resvblks(mp);
1269 xfs_quiesce_attr(mp);
1270 mp->m_flags |= XFS_MOUNT_RDONLY;
1277 * Second stage of a freeze. The data is already frozen so we only
1278 * need to take care of the metadata. Once that's done sync the superblock
1279 * to the log to dirty it in case of a crash while frozen. This ensures that we
1280 * will recover the unlinked inode lists on the next mount.
1284 struct super_block *sb)
1286 struct xfs_mount *mp = XFS_M(sb);
1288 xfs_save_resvblks(mp);
1289 xfs_quiesce_attr(mp);
1290 return xfs_sync_sb(mp, true);
1295 struct super_block *sb)
1297 struct xfs_mount *mp = XFS_M(sb);
1299 xfs_restore_resvblks(mp);
1300 xfs_log_work_queue(mp);
1305 xfs_fs_show_options(
1307 struct dentry *root)
1309 return xfs_showargs(XFS_M(root->d_sb), m);
1313 * This function fills in xfs_mount_t fields based on mount args.
1314 * Note: the superblock _has_ now been read in.
1318 struct xfs_mount *mp)
1320 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1322 /* Fail a mount where the logbuf is smaller than the log stripe */
1323 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1324 if (mp->m_logbsize <= 0 &&
1325 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1326 mp->m_logbsize = mp->m_sb.sb_logsunit;
1327 } else if (mp->m_logbsize > 0 &&
1328 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1330 "logbuf size must be greater than or equal to log stripe size");
1334 /* Fail a mount if the logbuf is larger than 32K */
1335 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1337 "logbuf size for version 1 logs must be 16K or 32K");
1343 * V5 filesystems always use attr2 format for attributes.
1345 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1346 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1348 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1349 MNTOPT_NOATTR2, MNTOPT_ATTR2);
1354 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1355 * told by noattr2 to turn it off
1357 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1358 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1359 mp->m_flags |= XFS_MOUNT_ATTR2;
1362 * prohibit r/w mounts of read-only filesystems
1364 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1366 "cannot mount a read-only filesystem as read-write");
1370 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1371 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1372 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1374 "Super block does not support project and group quota together");
1382 xfs_init_percpu_counters(
1383 struct xfs_mount *mp)
1387 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1391 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1395 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1402 percpu_counter_destroy(&mp->m_ifree);
1404 percpu_counter_destroy(&mp->m_icount);
1409 xfs_reinit_percpu_counters(
1410 struct xfs_mount *mp)
1412 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1413 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1414 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1418 xfs_destroy_percpu_counters(
1419 struct xfs_mount *mp)
1421 percpu_counter_destroy(&mp->m_icount);
1422 percpu_counter_destroy(&mp->m_ifree);
1423 percpu_counter_destroy(&mp->m_fdblocks);
1428 struct super_block *sb,
1433 struct xfs_mount *mp = NULL;
1434 int flags = 0, error = -ENOMEM;
1436 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1440 spin_lock_init(&mp->m_sb_lock);
1441 mutex_init(&mp->m_growlock);
1442 atomic_set(&mp->m_active_trans, 0);
1443 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1444 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1445 mp->m_kobj.kobject.kset = xfs_kset;
1450 error = xfs_parseargs(mp, (char *)data);
1452 goto out_free_fsname;
1454 sb_min_blocksize(sb, BBSIZE);
1455 sb->s_xattr = xfs_xattr_handlers;
1456 sb->s_export_op = &xfs_export_operations;
1457 #ifdef CONFIG_XFS_QUOTA
1458 sb->s_qcop = &xfs_quotactl_operations;
1459 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1461 sb->s_op = &xfs_super_operations;
1464 flags |= XFS_MFSI_QUIET;
1466 error = xfs_open_devices(mp);
1468 goto out_free_fsname;
1470 error = xfs_init_mount_workqueues(mp);
1472 goto out_close_devices;
1474 error = xfs_init_percpu_counters(mp);
1476 goto out_destroy_workqueues;
1478 /* Allocate stats memory before we do operations that might use it */
1479 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1480 if (!mp->m_stats.xs_stats) {
1482 goto out_destroy_counters;
1485 error = xfs_readsb(mp, flags);
1487 goto out_free_stats;
1489 error = xfs_finish_flags(mp);
1493 error = xfs_setup_devices(mp);
1497 error = xfs_filestream_mount(mp);
1502 * we must configure the block size in the superblock before we run the
1503 * full mount process as the mount process can lookup and cache inodes.
1505 sb->s_magic = XFS_SB_MAGIC;
1506 sb->s_blocksize = mp->m_sb.sb_blocksize;
1507 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1508 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1509 sb->s_max_links = XFS_MAXLINK;
1510 sb->s_time_gran = 1;
1511 set_posix_acl_flag(sb);
1513 /* version 5 superblocks support inode version counters. */
1514 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1515 sb->s_flags |= MS_I_VERSION;
1517 if (mp->m_flags & XFS_MOUNT_DAX) {
1519 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1520 if (sb->s_blocksize != PAGE_SIZE) {
1522 "Filesystem block size invalid for DAX Turning DAX off.");
1523 mp->m_flags &= ~XFS_MOUNT_DAX;
1524 } else if (!sb->s_bdev->bd_disk->fops->direct_access) {
1526 "Block device does not support DAX Turning DAX off.");
1527 mp->m_flags &= ~XFS_MOUNT_DAX;
1531 if (xfs_sb_version_hassparseinodes(&mp->m_sb))
1533 "EXPERIMENTAL sparse inode feature enabled. Use at your own risk!");
1535 error = xfs_mountfs(mp);
1537 goto out_filestream_unmount;
1539 root = igrab(VFS_I(mp->m_rootip));
1544 sb->s_root = d_make_root(root);
1552 out_filestream_unmount:
1553 xfs_filestream_unmount(mp);
1557 free_percpu(mp->m_stats.xs_stats);
1558 out_destroy_counters:
1559 xfs_destroy_percpu_counters(mp);
1560 out_destroy_workqueues:
1561 xfs_destroy_mount_workqueues(mp);
1563 xfs_close_devices(mp);
1565 xfs_free_fsname(mp);
1571 xfs_filestream_unmount(mp);
1578 struct super_block *sb)
1580 struct xfs_mount *mp = XFS_M(sb);
1582 xfs_notice(mp, "Unmounting Filesystem");
1583 xfs_filestream_unmount(mp);
1587 free_percpu(mp->m_stats.xs_stats);
1588 xfs_destroy_percpu_counters(mp);
1589 xfs_destroy_mount_workqueues(mp);
1590 xfs_close_devices(mp);
1591 xfs_free_fsname(mp);
1595 STATIC struct dentry *
1597 struct file_system_type *fs_type,
1599 const char *dev_name,
1602 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1606 xfs_fs_nr_cached_objects(
1607 struct super_block *sb,
1608 struct shrink_control *sc)
1610 return xfs_reclaim_inodes_count(XFS_M(sb));
1614 xfs_fs_free_cached_objects(
1615 struct super_block *sb,
1616 struct shrink_control *sc)
1618 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1621 static const struct super_operations xfs_super_operations = {
1622 .alloc_inode = xfs_fs_alloc_inode,
1623 .destroy_inode = xfs_fs_destroy_inode,
1624 .evict_inode = xfs_fs_evict_inode,
1625 .drop_inode = xfs_fs_drop_inode,
1626 .put_super = xfs_fs_put_super,
1627 .sync_fs = xfs_fs_sync_fs,
1628 .freeze_fs = xfs_fs_freeze,
1629 .unfreeze_fs = xfs_fs_unfreeze,
1630 .statfs = xfs_fs_statfs,
1631 .remount_fs = xfs_fs_remount,
1632 .show_options = xfs_fs_show_options,
1633 .nr_cached_objects = xfs_fs_nr_cached_objects,
1634 .free_cached_objects = xfs_fs_free_cached_objects,
1637 static struct file_system_type xfs_fs_type = {
1638 .owner = THIS_MODULE,
1640 .mount = xfs_fs_mount,
1641 .kill_sb = kill_block_super,
1642 .fs_flags = FS_REQUIRES_DEV,
1644 MODULE_ALIAS_FS("xfs");
1647 xfs_init_zones(void)
1650 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1651 if (!xfs_ioend_zone)
1654 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1656 if (!xfs_ioend_pool)
1657 goto out_destroy_ioend_zone;
1659 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1661 if (!xfs_log_ticket_zone)
1662 goto out_destroy_ioend_pool;
1664 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1665 "xfs_bmap_free_item");
1666 if (!xfs_bmap_free_item_zone)
1667 goto out_destroy_log_ticket_zone;
1669 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1671 if (!xfs_btree_cur_zone)
1672 goto out_destroy_bmap_free_item_zone;
1674 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1676 if (!xfs_da_state_zone)
1677 goto out_destroy_btree_cur_zone;
1679 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1680 if (!xfs_ifork_zone)
1681 goto out_destroy_da_state_zone;
1683 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1684 if (!xfs_trans_zone)
1685 goto out_destroy_ifork_zone;
1687 xfs_log_item_desc_zone =
1688 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1689 "xfs_log_item_desc");
1690 if (!xfs_log_item_desc_zone)
1691 goto out_destroy_trans_zone;
1694 * The size of the zone allocated buf log item is the maximum
1695 * size possible under XFS. This wastes a little bit of memory,
1696 * but it is much faster.
1698 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1700 if (!xfs_buf_item_zone)
1701 goto out_destroy_log_item_desc_zone;
1703 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1704 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1705 sizeof(xfs_extent_t))), "xfs_efd_item");
1707 goto out_destroy_buf_item_zone;
1709 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1710 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1711 sizeof(xfs_extent_t))), "xfs_efi_item");
1713 goto out_destroy_efd_zone;
1716 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1717 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1718 xfs_fs_inode_init_once);
1719 if (!xfs_inode_zone)
1720 goto out_destroy_efi_zone;
1723 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1724 KM_ZONE_SPREAD, NULL);
1726 goto out_destroy_inode_zone;
1727 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1729 if (!xfs_icreate_zone)
1730 goto out_destroy_ili_zone;
1734 out_destroy_ili_zone:
1735 kmem_zone_destroy(xfs_ili_zone);
1736 out_destroy_inode_zone:
1737 kmem_zone_destroy(xfs_inode_zone);
1738 out_destroy_efi_zone:
1739 kmem_zone_destroy(xfs_efi_zone);
1740 out_destroy_efd_zone:
1741 kmem_zone_destroy(xfs_efd_zone);
1742 out_destroy_buf_item_zone:
1743 kmem_zone_destroy(xfs_buf_item_zone);
1744 out_destroy_log_item_desc_zone:
1745 kmem_zone_destroy(xfs_log_item_desc_zone);
1746 out_destroy_trans_zone:
1747 kmem_zone_destroy(xfs_trans_zone);
1748 out_destroy_ifork_zone:
1749 kmem_zone_destroy(xfs_ifork_zone);
1750 out_destroy_da_state_zone:
1751 kmem_zone_destroy(xfs_da_state_zone);
1752 out_destroy_btree_cur_zone:
1753 kmem_zone_destroy(xfs_btree_cur_zone);
1754 out_destroy_bmap_free_item_zone:
1755 kmem_zone_destroy(xfs_bmap_free_item_zone);
1756 out_destroy_log_ticket_zone:
1757 kmem_zone_destroy(xfs_log_ticket_zone);
1758 out_destroy_ioend_pool:
1759 mempool_destroy(xfs_ioend_pool);
1760 out_destroy_ioend_zone:
1761 kmem_zone_destroy(xfs_ioend_zone);
1767 xfs_destroy_zones(void)
1770 * Make sure all delayed rcu free are flushed before we
1774 kmem_zone_destroy(xfs_icreate_zone);
1775 kmem_zone_destroy(xfs_ili_zone);
1776 kmem_zone_destroy(xfs_inode_zone);
1777 kmem_zone_destroy(xfs_efi_zone);
1778 kmem_zone_destroy(xfs_efd_zone);
1779 kmem_zone_destroy(xfs_buf_item_zone);
1780 kmem_zone_destroy(xfs_log_item_desc_zone);
1781 kmem_zone_destroy(xfs_trans_zone);
1782 kmem_zone_destroy(xfs_ifork_zone);
1783 kmem_zone_destroy(xfs_da_state_zone);
1784 kmem_zone_destroy(xfs_btree_cur_zone);
1785 kmem_zone_destroy(xfs_bmap_free_item_zone);
1786 kmem_zone_destroy(xfs_log_ticket_zone);
1787 mempool_destroy(xfs_ioend_pool);
1788 kmem_zone_destroy(xfs_ioend_zone);
1793 xfs_init_workqueues(void)
1796 * The allocation workqueue can be used in memory reclaim situations
1797 * (writepage path), and parallelism is only limited by the number of
1798 * AGs in all the filesystems mounted. Hence use the default large
1799 * max_active value for this workqueue.
1801 xfs_alloc_wq = alloc_workqueue("xfsalloc",
1802 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
1810 xfs_destroy_workqueues(void)
1812 destroy_workqueue(xfs_alloc_wq);
1820 printk(KERN_INFO XFS_VERSION_STRING " with "
1821 XFS_BUILD_OPTIONS " enabled\n");
1825 error = xfs_init_zones();
1829 error = xfs_init_workqueues();
1831 goto out_destroy_zones;
1833 error = xfs_mru_cache_init();
1835 goto out_destroy_wq;
1837 error = xfs_buf_init();
1839 goto out_mru_cache_uninit;
1841 error = xfs_init_procfs();
1843 goto out_buf_terminate;
1845 error = xfs_sysctl_register();
1847 goto out_cleanup_procfs;
1849 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
1852 goto out_sysctl_unregister;
1855 xfsstats.xs_kobj.kobject.kset = xfs_kset;
1857 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
1858 if (!xfsstats.xs_stats) {
1860 goto out_kset_unregister;
1863 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
1866 goto out_free_stats;
1869 xfs_dbg_kobj.kobject.kset = xfs_kset;
1870 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
1872 goto out_remove_stats_kobj;
1875 error = xfs_qm_init();
1877 goto out_remove_dbg_kobj;
1879 error = register_filesystem(&xfs_fs_type);
1886 out_remove_dbg_kobj:
1888 xfs_sysfs_del(&xfs_dbg_kobj);
1889 out_remove_stats_kobj:
1891 xfs_sysfs_del(&xfsstats.xs_kobj);
1893 free_percpu(xfsstats.xs_stats);
1894 out_kset_unregister:
1895 kset_unregister(xfs_kset);
1896 out_sysctl_unregister:
1897 xfs_sysctl_unregister();
1899 xfs_cleanup_procfs();
1901 xfs_buf_terminate();
1902 out_mru_cache_uninit:
1903 xfs_mru_cache_uninit();
1905 xfs_destroy_workqueues();
1907 xfs_destroy_zones();
1916 unregister_filesystem(&xfs_fs_type);
1918 xfs_sysfs_del(&xfs_dbg_kobj);
1920 xfs_sysfs_del(&xfsstats.xs_kobj);
1921 free_percpu(xfsstats.xs_stats);
1922 kset_unregister(xfs_kset);
1923 xfs_sysctl_unregister();
1924 xfs_cleanup_procfs();
1925 xfs_buf_terminate();
1926 xfs_mru_cache_uninit();
1927 xfs_destroy_workqueues();
1928 xfs_destroy_zones();
1929 xfs_uuid_table_free();
1932 module_init(init_xfs_fs);
1933 module_exit(exit_xfs_fs);
1935 MODULE_AUTHOR("Silicon Graphics, Inc.");
1936 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1937 MODULE_LICENSE("GPL");