Merge commit 'v2.6.29-rc1' into x86/urgent
[linux-2.6] / fs / xfs / linux-2.6 / xfs_super.c
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 #include "xfs.h"
19 #include "xfs_bit.h"
20 #include "xfs_log.h"
21 #include "xfs_inum.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_dir2.h"
26 #include "xfs_alloc.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_btree_trace.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_bmap.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
44 #include "xfs_fsops.h"
45 #include "xfs_rw.h"
46 #include "xfs_acl.h"
47 #include "xfs_attr.h"
48 #include "xfs_buf_item.h"
49 #include "xfs_utils.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_version.h"
52 #include "xfs_log_priv.h"
53 #include "xfs_trans_priv.h"
54 #include "xfs_filestream.h"
55 #include "xfs_da_btree.h"
56 #include "xfs_dir2_trace.h"
57 #include "xfs_extfree_item.h"
58 #include "xfs_mru_cache.h"
59 #include "xfs_inode_item.h"
60 #include "xfs_sync.h"
61
62 #include <linux/namei.h>
63 #include <linux/init.h>
64 #include <linux/mount.h>
65 #include <linux/mempool.h>
66 #include <linux/writeback.h>
67 #include <linux/kthread.h>
68 #include <linux/freezer.h>
69 #include <linux/parser.h>
70
71 static struct quotactl_ops xfs_quotactl_operations;
72 static struct super_operations xfs_super_operations;
73 static kmem_zone_t *xfs_ioend_zone;
74 mempool_t *xfs_ioend_pool;
75
76 #define MNTOPT_LOGBUFS  "logbufs"       /* number of XFS log buffers */
77 #define MNTOPT_LOGBSIZE "logbsize"      /* size of XFS log buffers */
78 #define MNTOPT_LOGDEV   "logdev"        /* log device */
79 #define MNTOPT_RTDEV    "rtdev"         /* realtime I/O device */
80 #define MNTOPT_BIOSIZE  "biosize"       /* log2 of preferred buffered io size */
81 #define MNTOPT_WSYNC    "wsync"         /* safe-mode nfs compatible mount */
82 #define MNTOPT_INO64    "ino64"         /* force inodes into 64-bit range */
83 #define MNTOPT_NOALIGN  "noalign"       /* turn off stripe alignment */
84 #define MNTOPT_SWALLOC  "swalloc"       /* turn on stripe width allocation */
85 #define MNTOPT_SUNIT    "sunit"         /* data volume stripe unit */
86 #define MNTOPT_SWIDTH   "swidth"        /* data volume stripe width */
87 #define MNTOPT_NOUUID   "nouuid"        /* ignore filesystem UUID */
88 #define MNTOPT_MTPT     "mtpt"          /* filesystem mount point */
89 #define MNTOPT_GRPID    "grpid"         /* group-ID from parent directory */
90 #define MNTOPT_NOGRPID  "nogrpid"       /* group-ID from current process */
91 #define MNTOPT_BSDGROUPS    "bsdgroups"    /* group-ID from parent directory */
92 #define MNTOPT_SYSVGROUPS   "sysvgroups"   /* group-ID from current process */
93 #define MNTOPT_ALLOCSIZE    "allocsize"    /* preferred allocation size */
94 #define MNTOPT_NORECOVERY   "norecovery"   /* don't run XFS recovery */
95 #define MNTOPT_BARRIER  "barrier"       /* use writer barriers for log write and
96                                          * unwritten extent conversion */
97 #define MNTOPT_NOBARRIER "nobarrier"    /* .. disable */
98 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
99 #define MNTOPT_64BITINODE   "inode64"   /* inodes can be allocated anywhere */
100 #define MNTOPT_IKEEP    "ikeep"         /* do not free empty inode clusters */
101 #define MNTOPT_NOIKEEP  "noikeep"       /* free empty inode clusters */
102 #define MNTOPT_LARGEIO     "largeio"    /* report large I/O sizes in stat() */
103 #define MNTOPT_NOLARGEIO   "nolargeio"  /* do not report large I/O sizes
104                                          * in stat(). */
105 #define MNTOPT_ATTR2    "attr2"         /* do use attr2 attribute format */
106 #define MNTOPT_NOATTR2  "noattr2"       /* do not use attr2 attribute format */
107 #define MNTOPT_FILESTREAM  "filestreams" /* use filestreams allocator */
108 #define MNTOPT_QUOTA    "quota"         /* disk quotas (user) */
109 #define MNTOPT_NOQUOTA  "noquota"       /* no quotas */
110 #define MNTOPT_USRQUOTA "usrquota"      /* user quota enabled */
111 #define MNTOPT_GRPQUOTA "grpquota"      /* group quota enabled */
112 #define MNTOPT_PRJQUOTA "prjquota"      /* project quota enabled */
113 #define MNTOPT_UQUOTA   "uquota"        /* user quota (IRIX variant) */
114 #define MNTOPT_GQUOTA   "gquota"        /* group quota (IRIX variant) */
115 #define MNTOPT_PQUOTA   "pquota"        /* project quota (IRIX variant) */
116 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
117 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
118 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
119 #define MNTOPT_QUOTANOENF  "qnoenforce" /* same as uqnoenforce */
120 #define MNTOPT_DMAPI    "dmapi"         /* DMI enabled (DMAPI / XDSM) */
121 #define MNTOPT_XDSM     "xdsm"          /* DMI enabled (DMAPI / XDSM) */
122 #define MNTOPT_DMI      "dmi"           /* DMI enabled (DMAPI / XDSM) */
123
124 /*
125  * Table driven mount option parser.
126  *
127  * Currently only used for remount, but it will be used for mount
128  * in the future, too.
129  */
130 enum {
131         Opt_barrier, Opt_nobarrier, Opt_err
132 };
133
134 static const match_table_t tokens = {
135         {Opt_barrier, "barrier"},
136         {Opt_nobarrier, "nobarrier"},
137         {Opt_err, NULL}
138 };
139
140
141 STATIC unsigned long
142 suffix_strtoul(char *s, char **endp, unsigned int base)
143 {
144         int     last, shift_left_factor = 0;
145         char    *value = s;
146
147         last = strlen(value) - 1;
148         if (value[last] == 'K' || value[last] == 'k') {
149                 shift_left_factor = 10;
150                 value[last] = '\0';
151         }
152         if (value[last] == 'M' || value[last] == 'm') {
153                 shift_left_factor = 20;
154                 value[last] = '\0';
155         }
156         if (value[last] == 'G' || value[last] == 'g') {
157                 shift_left_factor = 30;
158                 value[last] = '\0';
159         }
160
161         return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
162 }
163
164 /*
165  * This function fills in xfs_mount_t fields based on mount args.
166  * Note: the superblock has _not_ yet been read in.
167  *
168  * Note that this function leaks the various device name allocations on
169  * failure.  The caller takes care of them.
170  */
171 STATIC int
172 xfs_parseargs(
173         struct xfs_mount        *mp,
174         char                    *options,
175         char                    **mtpt)
176 {
177         struct super_block      *sb = mp->m_super;
178         char                    *this_char, *value, *eov;
179         int                     dsunit = 0;
180         int                     dswidth = 0;
181         int                     iosize = 0;
182         int                     dmapi_implies_ikeep = 1;
183         uchar_t                 iosizelog = 0;
184
185         /*
186          * Copy binary VFS mount flags we are interested in.
187          */
188         if (sb->s_flags & MS_RDONLY)
189                 mp->m_flags |= XFS_MOUNT_RDONLY;
190         if (sb->s_flags & MS_DIRSYNC)
191                 mp->m_flags |= XFS_MOUNT_DIRSYNC;
192         if (sb->s_flags & MS_SYNCHRONOUS)
193                 mp->m_flags |= XFS_MOUNT_WSYNC;
194
195         /*
196          * Set some default flags that could be cleared by the mount option
197          * parsing.
198          */
199         mp->m_flags |= XFS_MOUNT_BARRIER;
200         mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
201         mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
202
203         /*
204          * These can be overridden by the mount option parsing.
205          */
206         mp->m_logbufs = -1;
207         mp->m_logbsize = -1;
208
209         if (!options)
210                 goto done;
211
212         while ((this_char = strsep(&options, ",")) != NULL) {
213                 if (!*this_char)
214                         continue;
215                 if ((value = strchr(this_char, '=')) != NULL)
216                         *value++ = 0;
217
218                 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
219                         if (!value || !*value) {
220                                 cmn_err(CE_WARN,
221                                         "XFS: %s option requires an argument",
222                                         this_char);
223                                 return EINVAL;
224                         }
225                         mp->m_logbufs = simple_strtoul(value, &eov, 10);
226                 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
227                         if (!value || !*value) {
228                                 cmn_err(CE_WARN,
229                                         "XFS: %s option requires an argument",
230                                         this_char);
231                                 return EINVAL;
232                         }
233                         mp->m_logbsize = suffix_strtoul(value, &eov, 10);
234                 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
235                         if (!value || !*value) {
236                                 cmn_err(CE_WARN,
237                                         "XFS: %s option requires an argument",
238                                         this_char);
239                                 return EINVAL;
240                         }
241                         mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
242                         if (!mp->m_logname)
243                                 return ENOMEM;
244                 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
245                         if (!value || !*value) {
246                                 cmn_err(CE_WARN,
247                                         "XFS: %s option requires an argument",
248                                         this_char);
249                                 return EINVAL;
250                         }
251                         *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
252                         if (!*mtpt)
253                                 return ENOMEM;
254                 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
255                         if (!value || !*value) {
256                                 cmn_err(CE_WARN,
257                                         "XFS: %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                                 cmn_err(CE_WARN,
267                                         "XFS: %s option requires an argument",
268                                         this_char);
269                                 return EINVAL;
270                         }
271                         iosize = simple_strtoul(value, &eov, 10);
272                         iosizelog = ffs(iosize) - 1;
273                 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
274                         if (!value || !*value) {
275                                 cmn_err(CE_WARN,
276                                         "XFS: %s option requires an argument",
277                                         this_char);
278                                 return EINVAL;
279                         }
280                         iosize = suffix_strtoul(value, &eov, 10);
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_OSYNCISOSYNC)) {
291                         mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
292                 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
293                         mp->m_flags |= XFS_MOUNT_NORECOVERY;
294                 } else if (!strcmp(this_char, MNTOPT_INO64)) {
295 #if XFS_BIG_INUMS
296                         mp->m_flags |= XFS_MOUNT_INO64;
297                         mp->m_inoadd = XFS_INO64_OFFSET;
298 #else
299                         cmn_err(CE_WARN,
300                                 "XFS: %s option not allowed on this system",
301                                 this_char);
302                         return EINVAL;
303 #endif
304                 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
305                         mp->m_flags |= XFS_MOUNT_NOALIGN;
306                 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
307                         mp->m_flags |= XFS_MOUNT_SWALLOC;
308                 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
309                         if (!value || !*value) {
310                                 cmn_err(CE_WARN,
311                                         "XFS: %s option requires an argument",
312                                         this_char);
313                                 return EINVAL;
314                         }
315                         dsunit = simple_strtoul(value, &eov, 10);
316                 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
317                         if (!value || !*value) {
318                                 cmn_err(CE_WARN,
319                                         "XFS: %s option requires an argument",
320                                         this_char);
321                                 return EINVAL;
322                         }
323                         dswidth = simple_strtoul(value, &eov, 10);
324                 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
325                         mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
326 #if !XFS_BIG_INUMS
327                         cmn_err(CE_WARN,
328                                 "XFS: %s option not allowed on this system",
329                                 this_char);
330                         return EINVAL;
331 #endif
332                 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
333                         mp->m_flags |= XFS_MOUNT_NOUUID;
334                 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
335                         mp->m_flags |= XFS_MOUNT_BARRIER;
336                 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
337                         mp->m_flags &= ~XFS_MOUNT_BARRIER;
338                 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
339                         mp->m_flags |= XFS_MOUNT_IKEEP;
340                 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
341                         dmapi_implies_ikeep = 0;
342                         mp->m_flags &= ~XFS_MOUNT_IKEEP;
343                 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
344                         mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
345                 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
346                         mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
347                 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
348                         mp->m_flags |= XFS_MOUNT_ATTR2;
349                 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
350                         mp->m_flags &= ~XFS_MOUNT_ATTR2;
351                         mp->m_flags |= XFS_MOUNT_NOATTR2;
352                 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
353                         mp->m_flags |= XFS_MOUNT_FILESTREAMS;
354                 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
355                         mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
356                                           XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
357                                           XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
358                                           XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
359                 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
360                            !strcmp(this_char, MNTOPT_UQUOTA) ||
361                            !strcmp(this_char, MNTOPT_USRQUOTA)) {
362                         mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
363                                          XFS_UQUOTA_ENFD);
364                 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
365                            !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
366                         mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
367                         mp->m_qflags &= ~XFS_UQUOTA_ENFD;
368                 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
369                            !strcmp(this_char, MNTOPT_PRJQUOTA)) {
370                         mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
371                                          XFS_OQUOTA_ENFD);
372                 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
373                         mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
374                         mp->m_qflags &= ~XFS_OQUOTA_ENFD;
375                 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
376                            !strcmp(this_char, MNTOPT_GRPQUOTA)) {
377                         mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
378                                          XFS_OQUOTA_ENFD);
379                 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
380                         mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
381                         mp->m_qflags &= ~XFS_OQUOTA_ENFD;
382                 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
383                         mp->m_flags |= XFS_MOUNT_DMAPI;
384                 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
385                         mp->m_flags |= XFS_MOUNT_DMAPI;
386                 } else if (!strcmp(this_char, MNTOPT_DMI)) {
387                         mp->m_flags |= XFS_MOUNT_DMAPI;
388                 } else if (!strcmp(this_char, "ihashsize")) {
389                         cmn_err(CE_WARN,
390         "XFS: ihashsize no longer used, option is deprecated.");
391                 } else if (!strcmp(this_char, "osyncisdsync")) {
392                         /* no-op, this is now the default */
393                         cmn_err(CE_WARN,
394         "XFS: osyncisdsync is now the default, option is deprecated.");
395                 } else if (!strcmp(this_char, "irixsgid")) {
396                         cmn_err(CE_WARN,
397         "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
398                 } else {
399                         cmn_err(CE_WARN,
400                                 "XFS: unknown mount option [%s].", this_char);
401                         return EINVAL;
402                 }
403         }
404
405         /*
406          * no recovery flag requires a read-only mount
407          */
408         if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
409             !(mp->m_flags & XFS_MOUNT_RDONLY)) {
410                 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
411                 return EINVAL;
412         }
413
414         if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
415                 cmn_err(CE_WARN,
416         "XFS: sunit and swidth options incompatible with the noalign option");
417                 return EINVAL;
418         }
419
420         if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
421             (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
422                 cmn_err(CE_WARN,
423                         "XFS: cannot mount with both project and group quota");
424                 return EINVAL;
425         }
426
427         if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
428                 printk("XFS: %s option needs the mount point option as well\n",
429                         MNTOPT_DMAPI);
430                 return EINVAL;
431         }
432
433         if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
434                 cmn_err(CE_WARN,
435                         "XFS: sunit and swidth must be specified together");
436                 return EINVAL;
437         }
438
439         if (dsunit && (dswidth % dsunit != 0)) {
440                 cmn_err(CE_WARN,
441         "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
442                         dswidth, dsunit);
443                 return EINVAL;
444         }
445
446         /*
447          * Applications using DMI filesystems often expect the
448          * inode generation number to be monotonically increasing.
449          * If we delete inode chunks we break this assumption, so
450          * keep unused inode chunks on disk for DMI filesystems
451          * until we come up with a better solution.
452          * Note that if "ikeep" or "noikeep" mount options are
453          * supplied, then they are honored.
454          */
455         if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
456                 mp->m_flags |= XFS_MOUNT_IKEEP;
457
458 done:
459         if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
460                 /*
461                  * At this point the superblock has not been read
462                  * in, therefore we do not know the block size.
463                  * Before the mount call ends we will convert
464                  * these to FSBs.
465                  */
466                 if (dsunit) {
467                         mp->m_dalign = dsunit;
468                         mp->m_flags |= XFS_MOUNT_RETERR;
469                 }
470
471                 if (dswidth)
472                         mp->m_swidth = dswidth;
473         }
474
475         if (mp->m_logbufs != -1 &&
476             mp->m_logbufs != 0 &&
477             (mp->m_logbufs < XLOG_MIN_ICLOGS ||
478              mp->m_logbufs > XLOG_MAX_ICLOGS)) {
479                 cmn_err(CE_WARN,
480                         "XFS: invalid logbufs value: %d [not %d-%d]",
481                         mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
482                 return XFS_ERROR(EINVAL);
483         }
484         if (mp->m_logbsize != -1 &&
485             mp->m_logbsize !=  0 &&
486             (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
487              mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
488              !is_power_of_2(mp->m_logbsize))) {
489                 cmn_err(CE_WARN,
490         "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
491                         mp->m_logbsize);
492                 return XFS_ERROR(EINVAL);
493         }
494
495         mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
496         if (!mp->m_fsname)
497                 return ENOMEM;
498         mp->m_fsname_len = strlen(mp->m_fsname) + 1;
499
500         if (iosizelog) {
501                 if (iosizelog > XFS_MAX_IO_LOG ||
502                     iosizelog < XFS_MIN_IO_LOG) {
503                         cmn_err(CE_WARN,
504                 "XFS: invalid log iosize: %d [not %d-%d]",
505                                 iosizelog, XFS_MIN_IO_LOG,
506                                 XFS_MAX_IO_LOG);
507                         return XFS_ERROR(EINVAL);
508                 }
509
510                 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
511                 mp->m_readio_log = iosizelog;
512                 mp->m_writeio_log = iosizelog;
513         }
514
515         return 0;
516 }
517
518 struct proc_xfs_info {
519         int     flag;
520         char    *str;
521 };
522
523 STATIC int
524 xfs_showargs(
525         struct xfs_mount        *mp,
526         struct seq_file         *m)
527 {
528         static struct proc_xfs_info xfs_info_set[] = {
529                 /* the few simple ones we can get from the mount struct */
530                 { XFS_MOUNT_IKEEP,              "," MNTOPT_IKEEP },
531                 { XFS_MOUNT_WSYNC,              "," MNTOPT_WSYNC },
532                 { XFS_MOUNT_INO64,              "," MNTOPT_INO64 },
533                 { XFS_MOUNT_NOALIGN,            "," MNTOPT_NOALIGN },
534                 { XFS_MOUNT_SWALLOC,            "," MNTOPT_SWALLOC },
535                 { XFS_MOUNT_NOUUID,             "," MNTOPT_NOUUID },
536                 { XFS_MOUNT_NORECOVERY,         "," MNTOPT_NORECOVERY },
537                 { XFS_MOUNT_OSYNCISOSYNC,       "," MNTOPT_OSYNCISOSYNC },
538                 { XFS_MOUNT_ATTR2,              "," MNTOPT_ATTR2 },
539                 { XFS_MOUNT_FILESTREAMS,        "," MNTOPT_FILESTREAM },
540                 { XFS_MOUNT_DMAPI,              "," MNTOPT_DMAPI },
541                 { XFS_MOUNT_GRPID,              "," MNTOPT_GRPID },
542                 { 0, NULL }
543         };
544         static struct proc_xfs_info xfs_info_unset[] = {
545                 /* the few simple ones we can get from the mount struct */
546                 { XFS_MOUNT_COMPAT_IOSIZE,      "," MNTOPT_LARGEIO },
547                 { XFS_MOUNT_BARRIER,            "," MNTOPT_NOBARRIER },
548                 { XFS_MOUNT_SMALL_INUMS,        "," MNTOPT_64BITINODE },
549                 { 0, NULL }
550         };
551         struct proc_xfs_info    *xfs_infop;
552
553         for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
554                 if (mp->m_flags & xfs_infop->flag)
555                         seq_puts(m, xfs_infop->str);
556         }
557         for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
558                 if (!(mp->m_flags & xfs_infop->flag))
559                         seq_puts(m, xfs_infop->str);
560         }
561
562         if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
563                 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
564                                 (int)(1 << mp->m_writeio_log) >> 10);
565
566         if (mp->m_logbufs > 0)
567                 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
568         if (mp->m_logbsize > 0)
569                 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
570
571         if (mp->m_logname)
572                 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
573         if (mp->m_rtname)
574                 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
575
576         if (mp->m_dalign > 0)
577                 seq_printf(m, "," MNTOPT_SUNIT "=%d",
578                                 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
579         if (mp->m_swidth > 0)
580                 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
581                                 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
582
583         if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
584                 seq_puts(m, "," MNTOPT_USRQUOTA);
585         else if (mp->m_qflags & XFS_UQUOTA_ACCT)
586                 seq_puts(m, "," MNTOPT_UQUOTANOENF);
587
588         if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
589                 seq_puts(m, "," MNTOPT_PRJQUOTA);
590         else if (mp->m_qflags & XFS_PQUOTA_ACCT)
591                 seq_puts(m, "," MNTOPT_PQUOTANOENF);
592
593         if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
594                 seq_puts(m, "," MNTOPT_GRPQUOTA);
595         else if (mp->m_qflags & XFS_GQUOTA_ACCT)
596                 seq_puts(m, "," MNTOPT_GQUOTANOENF);
597
598         if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
599                 seq_puts(m, "," MNTOPT_NOQUOTA);
600
601         return 0;
602 }
603 __uint64_t
604 xfs_max_file_offset(
605         unsigned int            blockshift)
606 {
607         unsigned int            pagefactor = 1;
608         unsigned int            bitshift = BITS_PER_LONG - 1;
609
610         /* Figure out maximum filesize, on Linux this can depend on
611          * the filesystem blocksize (on 32 bit platforms).
612          * __block_prepare_write does this in an [unsigned] long...
613          *      page->index << (PAGE_CACHE_SHIFT - bbits)
614          * So, for page sized blocks (4K on 32 bit platforms),
615          * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
616          *      (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
617          * but for smaller blocksizes it is less (bbits = log2 bsize).
618          * Note1: get_block_t takes a long (implicit cast from above)
619          * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
620          * can optionally convert the [unsigned] long from above into
621          * an [unsigned] long long.
622          */
623
624 #if BITS_PER_LONG == 32
625 # if defined(CONFIG_LBD)
626         ASSERT(sizeof(sector_t) == 8);
627         pagefactor = PAGE_CACHE_SIZE;
628         bitshift = BITS_PER_LONG;
629 # else
630         pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
631 # endif
632 #endif
633
634         return (((__uint64_t)pagefactor) << bitshift) - 1;
635 }
636
637 int
638 xfs_blkdev_get(
639         xfs_mount_t             *mp,
640         const char              *name,
641         struct block_device     **bdevp)
642 {
643         int                     error = 0;
644
645         *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
646         if (IS_ERR(*bdevp)) {
647                 error = PTR_ERR(*bdevp);
648                 printk("XFS: Invalid device [%s], error=%d\n", name, error);
649         }
650
651         return -error;
652 }
653
654 void
655 xfs_blkdev_put(
656         struct block_device     *bdev)
657 {
658         if (bdev)
659                 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
660 }
661
662 /*
663  * Try to write out the superblock using barriers.
664  */
665 STATIC int
666 xfs_barrier_test(
667         xfs_mount_t     *mp)
668 {
669         xfs_buf_t       *sbp = xfs_getsb(mp, 0);
670         int             error;
671
672         XFS_BUF_UNDONE(sbp);
673         XFS_BUF_UNREAD(sbp);
674         XFS_BUF_UNDELAYWRITE(sbp);
675         XFS_BUF_WRITE(sbp);
676         XFS_BUF_UNASYNC(sbp);
677         XFS_BUF_ORDERED(sbp);
678
679         xfsbdstrat(mp, sbp);
680         error = xfs_iowait(sbp);
681
682         /*
683          * Clear all the flags we set and possible error state in the
684          * buffer.  We only did the write to try out whether barriers
685          * worked and shouldn't leave any traces in the superblock
686          * buffer.
687          */
688         XFS_BUF_DONE(sbp);
689         XFS_BUF_ERROR(sbp, 0);
690         XFS_BUF_UNORDERED(sbp);
691
692         xfs_buf_relse(sbp);
693         return error;
694 }
695
696 void
697 xfs_mountfs_check_barriers(xfs_mount_t *mp)
698 {
699         int error;
700
701         if (mp->m_logdev_targp != mp->m_ddev_targp) {
702                 xfs_fs_cmn_err(CE_NOTE, mp,
703                   "Disabling barriers, not supported with external log device");
704                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
705                 return;
706         }
707
708         if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
709                 xfs_fs_cmn_err(CE_NOTE, mp,
710                   "Disabling barriers, underlying device is readonly");
711                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
712                 return;
713         }
714
715         error = xfs_barrier_test(mp);
716         if (error) {
717                 xfs_fs_cmn_err(CE_NOTE, mp,
718                   "Disabling barriers, trial barrier write failed");
719                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
720                 return;
721         }
722 }
723
724 void
725 xfs_blkdev_issue_flush(
726         xfs_buftarg_t           *buftarg)
727 {
728         blkdev_issue_flush(buftarg->bt_bdev, NULL);
729 }
730
731 STATIC void
732 xfs_close_devices(
733         struct xfs_mount        *mp)
734 {
735         if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
736                 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
737                 xfs_free_buftarg(mp->m_logdev_targp);
738                 xfs_blkdev_put(logdev);
739         }
740         if (mp->m_rtdev_targp) {
741                 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
742                 xfs_free_buftarg(mp->m_rtdev_targp);
743                 xfs_blkdev_put(rtdev);
744         }
745         xfs_free_buftarg(mp->m_ddev_targp);
746 }
747
748 /*
749  * The file system configurations are:
750  *      (1) device (partition) with data and internal log
751  *      (2) logical volume with data and log subvolumes.
752  *      (3) logical volume with data, log, and realtime subvolumes.
753  *
754  * We only have to handle opening the log and realtime volumes here if
755  * they are present.  The data subvolume has already been opened by
756  * get_sb_bdev() and is stored in sb->s_bdev.
757  */
758 STATIC int
759 xfs_open_devices(
760         struct xfs_mount        *mp)
761 {
762         struct block_device     *ddev = mp->m_super->s_bdev;
763         struct block_device     *logdev = NULL, *rtdev = NULL;
764         int                     error;
765
766         /*
767          * Open real time and log devices - order is important.
768          */
769         if (mp->m_logname) {
770                 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
771                 if (error)
772                         goto out;
773         }
774
775         if (mp->m_rtname) {
776                 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
777                 if (error)
778                         goto out_close_logdev;
779
780                 if (rtdev == ddev || rtdev == logdev) {
781                         cmn_err(CE_WARN,
782         "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
783                         error = EINVAL;
784                         goto out_close_rtdev;
785                 }
786         }
787
788         /*
789          * Setup xfs_mount buffer target pointers
790          */
791         error = ENOMEM;
792         mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
793         if (!mp->m_ddev_targp)
794                 goto out_close_rtdev;
795
796         if (rtdev) {
797                 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
798                 if (!mp->m_rtdev_targp)
799                         goto out_free_ddev_targ;
800         }
801
802         if (logdev && logdev != ddev) {
803                 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
804                 if (!mp->m_logdev_targp)
805                         goto out_free_rtdev_targ;
806         } else {
807                 mp->m_logdev_targp = mp->m_ddev_targp;
808         }
809
810         return 0;
811
812  out_free_rtdev_targ:
813         if (mp->m_rtdev_targp)
814                 xfs_free_buftarg(mp->m_rtdev_targp);
815  out_free_ddev_targ:
816         xfs_free_buftarg(mp->m_ddev_targp);
817  out_close_rtdev:
818         if (rtdev)
819                 xfs_blkdev_put(rtdev);
820  out_close_logdev:
821         if (logdev && logdev != ddev)
822                 xfs_blkdev_put(logdev);
823  out:
824         return error;
825 }
826
827 /*
828  * Setup xfs_mount buffer target pointers based on superblock
829  */
830 STATIC int
831 xfs_setup_devices(
832         struct xfs_mount        *mp)
833 {
834         int                     error;
835
836         error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
837                                     mp->m_sb.sb_sectsize);
838         if (error)
839                 return error;
840
841         if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
842                 unsigned int    log_sector_size = BBSIZE;
843
844                 if (xfs_sb_version_hassector(&mp->m_sb))
845                         log_sector_size = mp->m_sb.sb_logsectsize;
846                 error = xfs_setsize_buftarg(mp->m_logdev_targp,
847                                             mp->m_sb.sb_blocksize,
848                                             log_sector_size);
849                 if (error)
850                         return error;
851         }
852         if (mp->m_rtdev_targp) {
853                 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
854                                             mp->m_sb.sb_blocksize,
855                                             mp->m_sb.sb_sectsize);
856                 if (error)
857                         return error;
858         }
859
860         return 0;
861 }
862
863 /*
864  * XFS AIL push thread support
865  */
866 void
867 xfsaild_wakeup(
868         struct xfs_ail          *ailp,
869         xfs_lsn_t               threshold_lsn)
870 {
871         ailp->xa_target = threshold_lsn;
872         wake_up_process(ailp->xa_task);
873 }
874
875 int
876 xfsaild(
877         void    *data)
878 {
879         struct xfs_ail  *ailp = data;
880         xfs_lsn_t       last_pushed_lsn = 0;
881         long            tout = 0;
882
883         while (!kthread_should_stop()) {
884                 if (tout)
885                         schedule_timeout_interruptible(msecs_to_jiffies(tout));
886                 tout = 1000;
887
888                 /* swsusp */
889                 try_to_freeze();
890
891                 ASSERT(ailp->xa_mount->m_log);
892                 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
893                         continue;
894
895                 tout = xfsaild_push(ailp, &last_pushed_lsn);
896         }
897
898         return 0;
899 }       /* xfsaild */
900
901 int
902 xfsaild_start(
903         struct xfs_ail  *ailp)
904 {
905         ailp->xa_target = 0;
906         ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
907         if (IS_ERR(ailp->xa_task))
908                 return -PTR_ERR(ailp->xa_task);
909         return 0;
910 }
911
912 void
913 xfsaild_stop(
914         struct xfs_ail  *ailp)
915 {
916         kthread_stop(ailp->xa_task);
917 }
918
919
920 /* Catch misguided souls that try to use this interface on XFS */
921 STATIC struct inode *
922 xfs_fs_alloc_inode(
923         struct super_block      *sb)
924 {
925         BUG();
926         return NULL;
927 }
928
929 /*
930  * Now that the generic code is guaranteed not to be accessing
931  * the linux inode, we can reclaim the inode.
932  */
933 STATIC void
934 xfs_fs_destroy_inode(
935         struct inode    *inode)
936 {
937         xfs_inode_t             *ip = XFS_I(inode);
938
939         XFS_STATS_INC(vn_reclaim);
940         if (xfs_reclaim(ip))
941                 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
942 }
943
944 /*
945  * Slab object creation initialisation for the XFS inode.
946  * This covers only the idempotent fields in the XFS inode;
947  * all other fields need to be initialised on allocation
948  * from the slab. This avoids the need to repeatedly intialise
949  * fields in the xfs inode that left in the initialise state
950  * when freeing the inode.
951  */
952 STATIC void
953 xfs_fs_inode_init_once(
954         void                    *inode)
955 {
956         struct xfs_inode        *ip = inode;
957
958         memset(ip, 0, sizeof(struct xfs_inode));
959
960         /* vfs inode */
961         inode_init_once(VFS_I(ip));
962
963         /* xfs inode */
964         atomic_set(&ip->i_iocount, 0);
965         atomic_set(&ip->i_pincount, 0);
966         spin_lock_init(&ip->i_flags_lock);
967         init_waitqueue_head(&ip->i_ipin_wait);
968         /*
969          * Because we want to use a counting completion, complete
970          * the flush completion once to allow a single access to
971          * the flush completion without blocking.
972          */
973         init_completion(&ip->i_flush);
974         complete(&ip->i_flush);
975
976         mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
977                      "xfsino", ip->i_ino);
978         mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
979 }
980
981 /*
982  * Attempt to flush the inode, this will actually fail
983  * if the inode is pinned, but we dirty the inode again
984  * at the point when it is unpinned after a log write,
985  * since this is when the inode itself becomes flushable.
986  */
987 STATIC int
988 xfs_fs_write_inode(
989         struct inode            *inode,
990         int                     sync)
991 {
992         struct xfs_inode        *ip = XFS_I(inode);
993         int                     error = 0;
994         int                     flags = 0;
995
996         xfs_itrace_entry(ip);
997         if (sync) {
998                 error = xfs_wait_on_pages(ip, 0, -1);
999                 if (error)
1000                         goto out_error;
1001                 flags |= FLUSH_SYNC;
1002         }
1003         error = xfs_inode_flush(ip, flags);
1004
1005 out_error:
1006         /*
1007          * if we failed to write out the inode then mark
1008          * it dirty again so we'll try again later.
1009          */
1010         if (error)
1011                 xfs_mark_inode_dirty_sync(ip);
1012
1013         return -error;
1014 }
1015
1016 STATIC void
1017 xfs_fs_clear_inode(
1018         struct inode            *inode)
1019 {
1020         xfs_inode_t             *ip = XFS_I(inode);
1021
1022         xfs_itrace_entry(ip);
1023         XFS_STATS_INC(vn_rele);
1024         XFS_STATS_INC(vn_remove);
1025         XFS_STATS_DEC(vn_active);
1026
1027         xfs_inactive(ip);
1028 }
1029
1030 STATIC void
1031 xfs_free_fsname(
1032         struct xfs_mount        *mp)
1033 {
1034         kfree(mp->m_fsname);
1035         kfree(mp->m_rtname);
1036         kfree(mp->m_logname);
1037 }
1038
1039 STATIC void
1040 xfs_fs_put_super(
1041         struct super_block      *sb)
1042 {
1043         struct xfs_mount        *mp = XFS_M(sb);
1044         struct xfs_inode        *rip = mp->m_rootip;
1045         int                     unmount_event_flags = 0;
1046
1047         xfs_syncd_stop(mp);
1048         xfs_sync_inodes(mp, SYNC_ATTR|SYNC_DELWRI);
1049
1050 #ifdef HAVE_DMAPI
1051         if (mp->m_flags & XFS_MOUNT_DMAPI) {
1052                 unmount_event_flags =
1053                         (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1054                                 0 : DM_FLAGS_UNWANTED;
1055                 /*
1056                  * Ignore error from dmapi here, first unmount is not allowed
1057                  * to fail anyway, and second we wouldn't want to fail a
1058                  * unmount because of dmapi.
1059                  */
1060                 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1061                                 NULL, NULL, 0, 0, unmount_event_flags);
1062         }
1063 #endif
1064
1065         /*
1066          * Blow away any referenced inode in the filestreams cache.
1067          * This can and will cause log traffic as inodes go inactive
1068          * here.
1069          */
1070         xfs_filestream_unmount(mp);
1071
1072         XFS_bflush(mp->m_ddev_targp);
1073
1074         if (mp->m_flags & XFS_MOUNT_DMAPI) {
1075                 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1076                                 unmount_event_flags);
1077         }
1078
1079         xfs_unmountfs(mp);
1080         xfs_freesb(mp);
1081         xfs_icsb_destroy_counters(mp);
1082         xfs_close_devices(mp);
1083         xfs_qmops_put(mp);
1084         xfs_dmops_put(mp);
1085         xfs_free_fsname(mp);
1086         kfree(mp);
1087 }
1088
1089 STATIC void
1090 xfs_fs_write_super(
1091         struct super_block      *sb)
1092 {
1093         if (!(sb->s_flags & MS_RDONLY))
1094                 xfs_sync_fsdata(XFS_M(sb), 0);
1095         sb->s_dirt = 0;
1096 }
1097
1098 STATIC int
1099 xfs_fs_sync_super(
1100         struct super_block      *sb,
1101         int                     wait)
1102 {
1103         struct xfs_mount        *mp = XFS_M(sb);
1104         int                     error;
1105
1106         /*
1107          * Treat a sync operation like a freeze.  This is to work
1108          * around a race in sync_inodes() which works in two phases
1109          * - an asynchronous flush, which can write out an inode
1110          * without waiting for file size updates to complete, and a
1111          * synchronous flush, which wont do anything because the
1112          * async flush removed the inode's dirty flag.  Also
1113          * sync_inodes() will not see any files that just have
1114          * outstanding transactions to be flushed because we don't
1115          * dirty the Linux inode until after the transaction I/O
1116          * completes.
1117          */
1118         if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
1119                 error = xfs_quiesce_data(mp);
1120         else
1121                 error = xfs_sync_fsdata(mp, 0);
1122         sb->s_dirt = 0;
1123
1124         if (unlikely(laptop_mode)) {
1125                 int     prev_sync_seq = mp->m_sync_seq;
1126
1127                 /*
1128                  * The disk must be active because we're syncing.
1129                  * We schedule xfssyncd now (now that the disk is
1130                  * active) instead of later (when it might not be).
1131                  */
1132                 wake_up_process(mp->m_sync_task);
1133                 /*
1134                  * We have to wait for the sync iteration to complete.
1135                  * If we don't, the disk activity caused by the sync
1136                  * will come after the sync is completed, and that
1137                  * triggers another sync from laptop mode.
1138                  */
1139                 wait_event(mp->m_wait_single_sync_task,
1140                                 mp->m_sync_seq != prev_sync_seq);
1141         }
1142
1143         return -error;
1144 }
1145
1146 STATIC int
1147 xfs_fs_statfs(
1148         struct dentry           *dentry,
1149         struct kstatfs          *statp)
1150 {
1151         struct xfs_mount        *mp = XFS_M(dentry->d_sb);
1152         xfs_sb_t                *sbp = &mp->m_sb;
1153         __uint64_t              fakeinos, id;
1154         xfs_extlen_t            lsize;
1155
1156         statp->f_type = XFS_SB_MAGIC;
1157         statp->f_namelen = MAXNAMELEN - 1;
1158
1159         id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1160         statp->f_fsid.val[0] = (u32)id;
1161         statp->f_fsid.val[1] = (u32)(id >> 32);
1162
1163         xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1164
1165         spin_lock(&mp->m_sb_lock);
1166         statp->f_bsize = sbp->sb_blocksize;
1167         lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1168         statp->f_blocks = sbp->sb_dblocks - lsize;
1169         statp->f_bfree = statp->f_bavail =
1170                                 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1171         fakeinos = statp->f_bfree << sbp->sb_inopblog;
1172 #if XFS_BIG_INUMS
1173         fakeinos += mp->m_inoadd;
1174 #endif
1175         statp->f_files =
1176             MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1177         if (mp->m_maxicount)
1178 #if XFS_BIG_INUMS
1179                 if (!mp->m_inoadd)
1180 #endif
1181                         statp->f_files = min_t(typeof(statp->f_files),
1182                                                 statp->f_files,
1183                                                 mp->m_maxicount);
1184         statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1185         spin_unlock(&mp->m_sb_lock);
1186
1187         XFS_QM_DQSTATVFS(XFS_I(dentry->d_inode), statp);
1188         return 0;
1189 }
1190
1191 STATIC int
1192 xfs_fs_remount(
1193         struct super_block      *sb,
1194         int                     *flags,
1195         char                    *options)
1196 {
1197         struct xfs_mount        *mp = XFS_M(sb);
1198         substring_t             args[MAX_OPT_ARGS];
1199         char                    *p;
1200
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
1212                         /*
1213                          * Test if barriers are actually working if we can,
1214                          * else delay this check until the filesystem is
1215                          * marked writeable.
1216                          */
1217                         if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1218                                 xfs_mountfs_check_barriers(mp);
1219                         break;
1220                 case Opt_nobarrier:
1221                         mp->m_flags &= ~XFS_MOUNT_BARRIER;
1222                         break;
1223                 default:
1224                         /*
1225                          * Logically we would return an error here to prevent
1226                          * users from believing they might have changed
1227                          * mount options using remount which can't be changed.
1228                          *
1229                          * But unfortunately mount(8) adds all options from
1230                          * mtab and fstab to the mount arguments in some cases
1231                          * so we can't blindly reject options, but have to
1232                          * check for each specified option if it actually
1233                          * differs from the currently set option and only
1234                          * reject it if that's the case.
1235                          *
1236                          * Until that is implemented we return success for
1237                          * every remount request, and silently ignore all
1238                          * options that we can't actually change.
1239                          */
1240 #if 0
1241                         printk(KERN_INFO
1242         "XFS: mount option \"%s\" not supported for remount\n", p);
1243                         return -EINVAL;
1244 #else
1245                         break;
1246 #endif
1247                 }
1248         }
1249
1250         /* rw/ro -> rw */
1251         if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1252                 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1253                 if (mp->m_flags & XFS_MOUNT_BARRIER)
1254                         xfs_mountfs_check_barriers(mp);
1255         }
1256
1257         /* rw -> ro */
1258         if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1259                 xfs_quiesce_data(mp);
1260                 xfs_quiesce_attr(mp);
1261                 mp->m_flags |= XFS_MOUNT_RDONLY;
1262         }
1263
1264         return 0;
1265 }
1266
1267 /*
1268  * Second stage of a freeze. The data is already frozen so we only
1269  * need to take care of the metadata. Once that's done write a dummy
1270  * record to dirty the log in case of a crash while frozen.
1271  */
1272 STATIC int
1273 xfs_fs_freeze(
1274         struct super_block      *sb)
1275 {
1276         struct xfs_mount        *mp = XFS_M(sb);
1277
1278         xfs_quiesce_attr(mp);
1279         return -xfs_fs_log_dummy(mp);
1280 }
1281
1282 STATIC int
1283 xfs_fs_show_options(
1284         struct seq_file         *m,
1285         struct vfsmount         *mnt)
1286 {
1287         return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1288 }
1289
1290 STATIC int
1291 xfs_fs_quotasync(
1292         struct super_block      *sb,
1293         int                     type)
1294 {
1295         return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XQUOTASYNC, 0, NULL);
1296 }
1297
1298 STATIC int
1299 xfs_fs_getxstate(
1300         struct super_block      *sb,
1301         struct fs_quota_stat    *fqs)
1302 {
1303         return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
1304 }
1305
1306 STATIC int
1307 xfs_fs_setxstate(
1308         struct super_block      *sb,
1309         unsigned int            flags,
1310         int                     op)
1311 {
1312         return -XFS_QM_QUOTACTL(XFS_M(sb), op, 0, (caddr_t)&flags);
1313 }
1314
1315 STATIC int
1316 xfs_fs_getxquota(
1317         struct super_block      *sb,
1318         int                     type,
1319         qid_t                   id,
1320         struct fs_disk_quota    *fdq)
1321 {
1322         return -XFS_QM_QUOTACTL(XFS_M(sb),
1323                                  (type == USRQUOTA) ? Q_XGETQUOTA :
1324                                   ((type == GRPQUOTA) ? Q_XGETGQUOTA :
1325                                    Q_XGETPQUOTA), id, (caddr_t)fdq);
1326 }
1327
1328 STATIC int
1329 xfs_fs_setxquota(
1330         struct super_block      *sb,
1331         int                     type,
1332         qid_t                   id,
1333         struct fs_disk_quota    *fdq)
1334 {
1335         return -XFS_QM_QUOTACTL(XFS_M(sb),
1336                                  (type == USRQUOTA) ? Q_XSETQLIM :
1337                                   ((type == GRPQUOTA) ? Q_XSETGQLIM :
1338                                    Q_XSETPQLIM), id, (caddr_t)fdq);
1339 }
1340
1341 /*
1342  * This function fills in xfs_mount_t fields based on mount args.
1343  * Note: the superblock _has_ now been read in.
1344  */
1345 STATIC int
1346 xfs_finish_flags(
1347         struct xfs_mount        *mp)
1348 {
1349         int                     ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1350
1351         /* Fail a mount where the logbuf is smaller than the log stripe */
1352         if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1353                 if (mp->m_logbsize <= 0 &&
1354                     mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1355                         mp->m_logbsize = mp->m_sb.sb_logsunit;
1356                 } else if (mp->m_logbsize > 0 &&
1357                            mp->m_logbsize < mp->m_sb.sb_logsunit) {
1358                         cmn_err(CE_WARN,
1359         "XFS: logbuf size must be greater than or equal to log stripe size");
1360                         return XFS_ERROR(EINVAL);
1361                 }
1362         } else {
1363                 /* Fail a mount if the logbuf is larger than 32K */
1364                 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1365                         cmn_err(CE_WARN,
1366         "XFS: logbuf size for version 1 logs must be 16K or 32K");
1367                         return XFS_ERROR(EINVAL);
1368                 }
1369         }
1370
1371         /*
1372          * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1373          * told by noattr2 to turn it off
1374          */
1375         if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1376             !(mp->m_flags & XFS_MOUNT_NOATTR2))
1377                 mp->m_flags |= XFS_MOUNT_ATTR2;
1378
1379         /*
1380          * prohibit r/w mounts of read-only filesystems
1381          */
1382         if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1383                 cmn_err(CE_WARN,
1384         "XFS: cannot mount a read-only filesystem as read-write");
1385                 return XFS_ERROR(EROFS);
1386         }
1387
1388         return 0;
1389 }
1390
1391 STATIC int
1392 xfs_fs_fill_super(
1393         struct super_block      *sb,
1394         void                    *data,
1395         int                     silent)
1396 {
1397         struct inode            *root;
1398         struct xfs_mount        *mp = NULL;
1399         int                     flags = 0, error = ENOMEM;
1400         char                    *mtpt = NULL;
1401
1402         mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1403         if (!mp)
1404                 goto out;
1405
1406         spin_lock_init(&mp->m_sb_lock);
1407         mutex_init(&mp->m_growlock);
1408         atomic_set(&mp->m_active_trans, 0);
1409         INIT_LIST_HEAD(&mp->m_sync_list);
1410         spin_lock_init(&mp->m_sync_lock);
1411         init_waitqueue_head(&mp->m_wait_single_sync_task);
1412
1413         mp->m_super = sb;
1414         sb->s_fs_info = mp;
1415
1416         error = xfs_parseargs(mp, (char *)data, &mtpt);
1417         if (error)
1418                 goto out_free_fsname;
1419
1420         sb_min_blocksize(sb, BBSIZE);
1421         sb->s_xattr = xfs_xattr_handlers;
1422         sb->s_export_op = &xfs_export_operations;
1423         sb->s_qcop = &xfs_quotactl_operations;
1424         sb->s_op = &xfs_super_operations;
1425
1426         error = xfs_dmops_get(mp);
1427         if (error)
1428                 goto out_free_fsname;
1429         error = xfs_qmops_get(mp);
1430         if (error)
1431                 goto out_put_dmops;
1432
1433         if (silent)
1434                 flags |= XFS_MFSI_QUIET;
1435
1436         error = xfs_open_devices(mp);
1437         if (error)
1438                 goto out_put_qmops;
1439
1440         if (xfs_icsb_init_counters(mp))
1441                 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1442
1443         error = xfs_readsb(mp, flags);
1444         if (error)
1445                 goto out_destroy_counters;
1446
1447         error = xfs_finish_flags(mp);
1448         if (error)
1449                 goto out_free_sb;
1450
1451         error = xfs_setup_devices(mp);
1452         if (error)
1453                 goto out_free_sb;
1454
1455         if (mp->m_flags & XFS_MOUNT_BARRIER)
1456                 xfs_mountfs_check_barriers(mp);
1457
1458         error = xfs_filestream_mount(mp);
1459         if (error)
1460                 goto out_free_sb;
1461
1462         error = xfs_mountfs(mp);
1463         if (error)
1464                 goto out_filestream_unmount;
1465
1466         XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1467
1468         sb->s_dirt = 1;
1469         sb->s_magic = XFS_SB_MAGIC;
1470         sb->s_blocksize = mp->m_sb.sb_blocksize;
1471         sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1472         sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1473         sb->s_time_gran = 1;
1474         set_posix_acl_flag(sb);
1475
1476         root = igrab(VFS_I(mp->m_rootip));
1477         if (!root) {
1478                 error = ENOENT;
1479                 goto fail_unmount;
1480         }
1481         if (is_bad_inode(root)) {
1482                 error = EINVAL;
1483                 goto fail_vnrele;
1484         }
1485         sb->s_root = d_alloc_root(root);
1486         if (!sb->s_root) {
1487                 error = ENOMEM;
1488                 goto fail_vnrele;
1489         }
1490
1491         error = xfs_syncd_init(mp);
1492         if (error)
1493                 goto fail_vnrele;
1494
1495         kfree(mtpt);
1496
1497         xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1498         return 0;
1499
1500  out_filestream_unmount:
1501         xfs_filestream_unmount(mp);
1502  out_free_sb:
1503         xfs_freesb(mp);
1504  out_destroy_counters:
1505         xfs_icsb_destroy_counters(mp);
1506         xfs_close_devices(mp);
1507  out_put_qmops:
1508         xfs_qmops_put(mp);
1509  out_put_dmops:
1510         xfs_dmops_put(mp);
1511  out_free_fsname:
1512         xfs_free_fsname(mp);
1513         kfree(mtpt);
1514         kfree(mp);
1515  out:
1516         return -error;
1517
1518  fail_vnrele:
1519         if (sb->s_root) {
1520                 dput(sb->s_root);
1521                 sb->s_root = NULL;
1522         } else {
1523                 iput(root);
1524         }
1525
1526  fail_unmount:
1527         /*
1528          * Blow away any referenced inode in the filestreams cache.
1529          * This can and will cause log traffic as inodes go inactive
1530          * here.
1531          */
1532         xfs_filestream_unmount(mp);
1533
1534         XFS_bflush(mp->m_ddev_targp);
1535
1536         xfs_unmountfs(mp);
1537         goto out_free_sb;
1538 }
1539
1540 STATIC int
1541 xfs_fs_get_sb(
1542         struct file_system_type *fs_type,
1543         int                     flags,
1544         const char              *dev_name,
1545         void                    *data,
1546         struct vfsmount         *mnt)
1547 {
1548         return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1549                            mnt);
1550 }
1551
1552 static struct super_operations xfs_super_operations = {
1553         .alloc_inode            = xfs_fs_alloc_inode,
1554         .destroy_inode          = xfs_fs_destroy_inode,
1555         .write_inode            = xfs_fs_write_inode,
1556         .clear_inode            = xfs_fs_clear_inode,
1557         .put_super              = xfs_fs_put_super,
1558         .write_super            = xfs_fs_write_super,
1559         .sync_fs                = xfs_fs_sync_super,
1560         .freeze_fs              = xfs_fs_freeze,
1561         .statfs                 = xfs_fs_statfs,
1562         .remount_fs             = xfs_fs_remount,
1563         .show_options           = xfs_fs_show_options,
1564 };
1565
1566 static struct quotactl_ops xfs_quotactl_operations = {
1567         .quota_sync             = xfs_fs_quotasync,
1568         .get_xstate             = xfs_fs_getxstate,
1569         .set_xstate             = xfs_fs_setxstate,
1570         .get_xquota             = xfs_fs_getxquota,
1571         .set_xquota             = xfs_fs_setxquota,
1572 };
1573
1574 static struct file_system_type xfs_fs_type = {
1575         .owner                  = THIS_MODULE,
1576         .name                   = "xfs",
1577         .get_sb                 = xfs_fs_get_sb,
1578         .kill_sb                = kill_block_super,
1579         .fs_flags               = FS_REQUIRES_DEV,
1580 };
1581
1582 STATIC int __init
1583 xfs_alloc_trace_bufs(void)
1584 {
1585 #ifdef XFS_ALLOC_TRACE
1586         xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1587         if (!xfs_alloc_trace_buf)
1588                 goto out;
1589 #endif
1590 #ifdef XFS_BMAP_TRACE
1591         xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1592         if (!xfs_bmap_trace_buf)
1593                 goto out_free_alloc_trace;
1594 #endif
1595 #ifdef XFS_BTREE_TRACE
1596         xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1597                                              KM_MAYFAIL);
1598         if (!xfs_allocbt_trace_buf)
1599                 goto out_free_bmap_trace;
1600
1601         xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1602         if (!xfs_inobt_trace_buf)
1603                 goto out_free_allocbt_trace;
1604
1605         xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1606         if (!xfs_bmbt_trace_buf)
1607                 goto out_free_inobt_trace;
1608 #endif
1609 #ifdef XFS_ATTR_TRACE
1610         xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1611         if (!xfs_attr_trace_buf)
1612                 goto out_free_bmbt_trace;
1613 #endif
1614 #ifdef XFS_DIR2_TRACE
1615         xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1616         if (!xfs_dir2_trace_buf)
1617                 goto out_free_attr_trace;
1618 #endif
1619
1620         return 0;
1621
1622 #ifdef XFS_DIR2_TRACE
1623  out_free_attr_trace:
1624 #endif
1625 #ifdef XFS_ATTR_TRACE
1626         ktrace_free(xfs_attr_trace_buf);
1627  out_free_bmbt_trace:
1628 #endif
1629 #ifdef XFS_BTREE_TRACE
1630         ktrace_free(xfs_bmbt_trace_buf);
1631  out_free_inobt_trace:
1632         ktrace_free(xfs_inobt_trace_buf);
1633  out_free_allocbt_trace:
1634         ktrace_free(xfs_allocbt_trace_buf);
1635  out_free_bmap_trace:
1636 #endif
1637 #ifdef XFS_BMAP_TRACE
1638         ktrace_free(xfs_bmap_trace_buf);
1639  out_free_alloc_trace:
1640 #endif
1641 #ifdef XFS_ALLOC_TRACE
1642         ktrace_free(xfs_alloc_trace_buf);
1643  out:
1644 #endif
1645         return -ENOMEM;
1646 }
1647
1648 STATIC void
1649 xfs_free_trace_bufs(void)
1650 {
1651 #ifdef XFS_DIR2_TRACE
1652         ktrace_free(xfs_dir2_trace_buf);
1653 #endif
1654 #ifdef XFS_ATTR_TRACE
1655         ktrace_free(xfs_attr_trace_buf);
1656 #endif
1657 #ifdef XFS_BTREE_TRACE
1658         ktrace_free(xfs_bmbt_trace_buf);
1659         ktrace_free(xfs_inobt_trace_buf);
1660         ktrace_free(xfs_allocbt_trace_buf);
1661 #endif
1662 #ifdef XFS_BMAP_TRACE
1663         ktrace_free(xfs_bmap_trace_buf);
1664 #endif
1665 #ifdef XFS_ALLOC_TRACE
1666         ktrace_free(xfs_alloc_trace_buf);
1667 #endif
1668 }
1669
1670 STATIC int __init
1671 xfs_init_zones(void)
1672 {
1673
1674         xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1675         if (!xfs_ioend_zone)
1676                 goto out;
1677
1678         xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1679                                                   xfs_ioend_zone);
1680         if (!xfs_ioend_pool)
1681                 goto out_destroy_ioend_zone;
1682
1683         xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1684                                                 "xfs_log_ticket");
1685         if (!xfs_log_ticket_zone)
1686                 goto out_destroy_ioend_pool;
1687
1688         xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1689                                                 "xfs_bmap_free_item");
1690         if (!xfs_bmap_free_item_zone)
1691                 goto out_destroy_log_ticket_zone;
1692
1693         xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1694                                                 "xfs_btree_cur");
1695         if (!xfs_btree_cur_zone)
1696                 goto out_destroy_bmap_free_item_zone;
1697
1698         xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1699                                                 "xfs_da_state");
1700         if (!xfs_da_state_zone)
1701                 goto out_destroy_btree_cur_zone;
1702
1703         xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1704         if (!xfs_dabuf_zone)
1705                 goto out_destroy_da_state_zone;
1706
1707         xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1708         if (!xfs_ifork_zone)
1709                 goto out_destroy_dabuf_zone;
1710
1711         xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1712         if (!xfs_trans_zone)
1713                 goto out_destroy_ifork_zone;
1714
1715         /*
1716          * The size of the zone allocated buf log item is the maximum
1717          * size possible under XFS.  This wastes a little bit of memory,
1718          * but it is much faster.
1719          */
1720         xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1721                                 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1722                                   NBWORD) * sizeof(int))), "xfs_buf_item");
1723         if (!xfs_buf_item_zone)
1724                 goto out_destroy_trans_zone;
1725
1726         xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1727                         ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1728                                  sizeof(xfs_extent_t))), "xfs_efd_item");
1729         if (!xfs_efd_zone)
1730                 goto out_destroy_buf_item_zone;
1731
1732         xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1733                         ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1734                                 sizeof(xfs_extent_t))), "xfs_efi_item");
1735         if (!xfs_efi_zone)
1736                 goto out_destroy_efd_zone;
1737
1738         xfs_inode_zone =
1739                 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1740                         KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1741                         xfs_fs_inode_init_once);
1742         if (!xfs_inode_zone)
1743                 goto out_destroy_efi_zone;
1744
1745         xfs_ili_zone =
1746                 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1747                                         KM_ZONE_SPREAD, NULL);
1748         if (!xfs_ili_zone)
1749                 goto out_destroy_inode_zone;
1750
1751 #ifdef CONFIG_XFS_POSIX_ACL
1752         xfs_acl_zone = kmem_zone_init(sizeof(xfs_acl_t), "xfs_acl");
1753         if (!xfs_acl_zone)
1754                 goto out_destroy_ili_zone;
1755 #endif
1756
1757         return 0;
1758
1759 #ifdef CONFIG_XFS_POSIX_ACL
1760  out_destroy_ili_zone:
1761 #endif
1762         kmem_zone_destroy(xfs_ili_zone);
1763  out_destroy_inode_zone:
1764         kmem_zone_destroy(xfs_inode_zone);
1765  out_destroy_efi_zone:
1766         kmem_zone_destroy(xfs_efi_zone);
1767  out_destroy_efd_zone:
1768         kmem_zone_destroy(xfs_efd_zone);
1769  out_destroy_buf_item_zone:
1770         kmem_zone_destroy(xfs_buf_item_zone);
1771  out_destroy_trans_zone:
1772         kmem_zone_destroy(xfs_trans_zone);
1773  out_destroy_ifork_zone:
1774         kmem_zone_destroy(xfs_ifork_zone);
1775  out_destroy_dabuf_zone:
1776         kmem_zone_destroy(xfs_dabuf_zone);
1777  out_destroy_da_state_zone:
1778         kmem_zone_destroy(xfs_da_state_zone);
1779  out_destroy_btree_cur_zone:
1780         kmem_zone_destroy(xfs_btree_cur_zone);
1781  out_destroy_bmap_free_item_zone:
1782         kmem_zone_destroy(xfs_bmap_free_item_zone);
1783  out_destroy_log_ticket_zone:
1784         kmem_zone_destroy(xfs_log_ticket_zone);
1785  out_destroy_ioend_pool:
1786         mempool_destroy(xfs_ioend_pool);
1787  out_destroy_ioend_zone:
1788         kmem_zone_destroy(xfs_ioend_zone);
1789  out:
1790         return -ENOMEM;
1791 }
1792
1793 STATIC void
1794 xfs_destroy_zones(void)
1795 {
1796 #ifdef CONFIG_XFS_POSIX_ACL
1797         kmem_zone_destroy(xfs_acl_zone);
1798 #endif
1799         kmem_zone_destroy(xfs_ili_zone);
1800         kmem_zone_destroy(xfs_inode_zone);
1801         kmem_zone_destroy(xfs_efi_zone);
1802         kmem_zone_destroy(xfs_efd_zone);
1803         kmem_zone_destroy(xfs_buf_item_zone);
1804         kmem_zone_destroy(xfs_trans_zone);
1805         kmem_zone_destroy(xfs_ifork_zone);
1806         kmem_zone_destroy(xfs_dabuf_zone);
1807         kmem_zone_destroy(xfs_da_state_zone);
1808         kmem_zone_destroy(xfs_btree_cur_zone);
1809         kmem_zone_destroy(xfs_bmap_free_item_zone);
1810         kmem_zone_destroy(xfs_log_ticket_zone);
1811         mempool_destroy(xfs_ioend_pool);
1812         kmem_zone_destroy(xfs_ioend_zone);
1813
1814 }
1815
1816 STATIC int __init
1817 init_xfs_fs(void)
1818 {
1819         int                     error;
1820
1821         printk(KERN_INFO XFS_VERSION_STRING " with "
1822                          XFS_BUILD_OPTIONS " enabled\n");
1823
1824         ktrace_init(64);
1825         xfs_ioend_init();
1826         xfs_dir_startup();
1827
1828         error = xfs_init_zones();
1829         if (error)
1830                 goto out;
1831
1832         error = xfs_alloc_trace_bufs();
1833         if (error)
1834                 goto out_destroy_zones;
1835
1836         error = xfs_mru_cache_init();
1837         if (error)
1838                 goto out_free_trace_buffers;
1839
1840         error = xfs_filestream_init();
1841         if (error)
1842                 goto out_mru_cache_uninit;
1843
1844         error = xfs_buf_init();
1845         if (error)
1846                 goto out_filestream_uninit;
1847
1848         error = xfs_init_procfs();
1849         if (error)
1850                 goto out_buf_terminate;
1851
1852         error = xfs_sysctl_register();
1853         if (error)
1854                 goto out_cleanup_procfs;
1855
1856         vfs_initquota();
1857
1858         error = register_filesystem(&xfs_fs_type);
1859         if (error)
1860                 goto out_sysctl_unregister;
1861         return 0;
1862
1863  out_sysctl_unregister:
1864         xfs_sysctl_unregister();
1865  out_cleanup_procfs:
1866         xfs_cleanup_procfs();
1867  out_buf_terminate:
1868         xfs_buf_terminate();
1869  out_filestream_uninit:
1870         xfs_filestream_uninit();
1871  out_mru_cache_uninit:
1872         xfs_mru_cache_uninit();
1873  out_free_trace_buffers:
1874         xfs_free_trace_bufs();
1875  out_destroy_zones:
1876         xfs_destroy_zones();
1877  out:
1878         return error;
1879 }
1880
1881 STATIC void __exit
1882 exit_xfs_fs(void)
1883 {
1884         vfs_exitquota();
1885         unregister_filesystem(&xfs_fs_type);
1886         xfs_sysctl_unregister();
1887         xfs_cleanup_procfs();
1888         xfs_buf_terminate();
1889         xfs_filestream_uninit();
1890         xfs_mru_cache_uninit();
1891         xfs_free_trace_bufs();
1892         xfs_destroy_zones();
1893         ktrace_uninit();
1894 }
1895
1896 module_init(init_xfs_fs);
1897 module_exit(exit_xfs_fs);
1898
1899 MODULE_AUTHOR("Silicon Graphics, Inc.");
1900 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1901 MODULE_LICENSE("GPL");