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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scotta805bad2006-06-19 08:40:27 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000018
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110022#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_trans.h"
24#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110025#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_dir2.h"
27#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_quota.h"
29#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110031#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_dinode.h"
34#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110035#include "xfs_btree.h"
Christoph Hellwig8c4ed632008-10-30 16:55:13 +110036#include "xfs_btree_trace.h"
Nathan Scotta844f452005-11-02 14:38:42 +110037#include "xfs_ialloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "xfs_rtalloc.h"
40#include "xfs_error.h"
41#include "xfs_itable.h"
Christoph Hellwig9909c4a2007-10-11 18:11:14 +100042#include "xfs_fsops.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include "xfs_attr.h"
44#include "xfs_buf_item.h"
45#include "xfs_utils.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100046#include "xfs_vnodeops.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include "xfs_version.h"
David Chinnera67d7c52007-11-23 16:29:32 +110048#include "xfs_log_priv.h"
David Chinner249a8c12008-02-05 12:13:32 +110049#include "xfs_trans_priv.h"
Christoph Hellwig48b62a12008-05-20 11:30:39 +100050#include "xfs_filestream.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100051#include "xfs_da_btree.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100052#include "xfs_extfree_item.h"
53#include "xfs_mru_cache.h"
54#include "xfs_inode_item.h"
David Chinnerfe4fa4b2008-10-30 17:06:08 +110055#include "xfs_sync.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000056#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58#include <linux/namei.h>
59#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090060#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/mount.h>
Christoph Hellwig0829c362005-09-02 16:58:49 +100062#include <linux/mempool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <linux/writeback.h>
Christoph Hellwig4df08c52005-09-05 08:34:18 +100064#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080065#include <linux/freezer.h>
Christoph Hellwig62a877e2008-07-18 17:12:36 +100066#include <linux/parser.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Alexey Dobriyanb87221d2009-09-21 17:01:09 -070068static const struct super_operations xfs_super_operations;
David Chinner7989cb82007-02-10 18:34:56 +110069static kmem_zone_t *xfs_ioend_zone;
Christoph Hellwig0829c362005-09-02 16:58:49 +100070mempool_t *xfs_ioend_pool;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
David Chinnera67d7c52007-11-23 16:29:32 +110072#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
73#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
74#define MNTOPT_LOGDEV "logdev" /* log device */
75#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
76#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
77#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
David Chinnera67d7c52007-11-23 16:29:32 +110078#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
79#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
80#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
81#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
82#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
83#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
84#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
85#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
86#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
87#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
88#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
89#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
90#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
91 * unwritten extent conversion */
92#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
93#define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
94#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
95#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
96#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
97#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
98#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
99 * in stat(). */
100#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
101#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
102#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
103#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
104#define MNTOPT_NOQUOTA "noquota" /* no quotas */
105#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
106#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
107#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
108#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
109#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
110#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
111#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
112#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
113#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
114#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
Dave Chinner71e330b2010-05-21 14:37:18 +1000115#define MNTOPT_DELAYLOG "delaylog" /* Delayed loging enabled */
116#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed loging disabled */
David Chinnera67d7c52007-11-23 16:29:32 +1100117
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000118/*
119 * Table driven mount option parser.
120 *
121 * Currently only used for remount, but it will be used for mount
122 * in the future, too.
123 */
124enum {
125 Opt_barrier, Opt_nobarrier, Opt_err
126};
127
Steven Whitehousea447c092008-10-13 10:46:57 +0100128static const match_table_t tokens = {
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000129 {Opt_barrier, "barrier"},
130 {Opt_nobarrier, "nobarrier"},
131 {Opt_err, NULL}
132};
133
134
David Chinnera67d7c52007-11-23 16:29:32 +1100135STATIC unsigned long
136suffix_strtoul(char *s, char **endp, unsigned int base)
137{
138 int last, shift_left_factor = 0;
139 char *value = s;
140
141 last = strlen(value) - 1;
142 if (value[last] == 'K' || value[last] == 'k') {
143 shift_left_factor = 10;
144 value[last] = '\0';
145 }
146 if (value[last] == 'M' || value[last] == 'm') {
147 shift_left_factor = 20;
148 value[last] = '\0';
149 }
150 if (value[last] == 'G' || value[last] == 'g') {
151 shift_left_factor = 30;
152 value[last] = '\0';
153 }
154
155 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
156}
157
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100158/*
159 * This function fills in xfs_mount_t fields based on mount args.
160 * Note: the superblock has _not_ yet been read in.
161 *
162 * Note that this function leaks the various device name allocations on
163 * failure. The caller takes care of them.
164 */
David Chinnera67d7c52007-11-23 16:29:32 +1100165STATIC int
166xfs_parseargs(
167 struct xfs_mount *mp,
Christoph Hellwig288699f2010-06-23 18:11:15 +1000168 char *options)
David Chinnera67d7c52007-11-23 16:29:32 +1100169{
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100170 struct super_block *sb = mp->m_super;
David Chinnera67d7c52007-11-23 16:29:32 +1100171 char *this_char, *value, *eov;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100172 int dsunit = 0;
173 int dswidth = 0;
174 int iosize = 0;
Christoph Hellwiga5687782009-02-09 08:37:39 +0100175 __uint8_t iosizelog = 0;
David Chinnera67d7c52007-11-23 16:29:32 +1100176
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100177 /*
178 * Copy binary VFS mount flags we are interested in.
179 */
180 if (sb->s_flags & MS_RDONLY)
181 mp->m_flags |= XFS_MOUNT_RDONLY;
182 if (sb->s_flags & MS_DIRSYNC)
183 mp->m_flags |= XFS_MOUNT_DIRSYNC;
184 if (sb->s_flags & MS_SYNCHRONOUS)
185 mp->m_flags |= XFS_MOUNT_WSYNC;
186
187 /*
188 * Set some default flags that could be cleared by the mount option
189 * parsing.
190 */
191 mp->m_flags |= XFS_MOUNT_BARRIER;
192 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
193 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
194
195 /*
196 * These can be overridden by the mount option parsing.
197 */
198 mp->m_logbufs = -1;
199 mp->m_logbsize = -1;
David Chinnera67d7c52007-11-23 16:29:32 +1100200
201 if (!options)
202 goto done;
203
David Chinnera67d7c52007-11-23 16:29:32 +1100204 while ((this_char = strsep(&options, ",")) != NULL) {
205 if (!*this_char)
206 continue;
207 if ((value = strchr(this_char, '=')) != NULL)
208 *value++ = 0;
209
210 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
211 if (!value || !*value) {
212 cmn_err(CE_WARN,
213 "XFS: %s option requires an argument",
214 this_char);
215 return EINVAL;
216 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100217 mp->m_logbufs = simple_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100218 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
219 if (!value || !*value) {
220 cmn_err(CE_WARN,
221 "XFS: %s option requires an argument",
222 this_char);
223 return EINVAL;
224 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100225 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100226 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
227 if (!value || !*value) {
228 cmn_err(CE_WARN,
229 "XFS: %s option requires an argument",
230 this_char);
231 return EINVAL;
232 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100233 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
234 if (!mp->m_logname)
235 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100236 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
Christoph Hellwig288699f2010-06-23 18:11:15 +1000237 cmn_err(CE_WARN,
238 "XFS: %s option not allowed on this system",
239 this_char);
240 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100241 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
242 if (!value || !*value) {
243 cmn_err(CE_WARN,
244 "XFS: %s option requires an argument",
245 this_char);
246 return EINVAL;
247 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100248 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 if (!mp->m_rtname)
250 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100251 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
252 if (!value || !*value) {
253 cmn_err(CE_WARN,
254 "XFS: %s option requires an argument",
255 this_char);
256 return EINVAL;
257 }
258 iosize = simple_strtoul(value, &eov, 10);
Christoph Hellwig1ec79442008-10-30 17:55:08 +1100259 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100260 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
261 if (!value || !*value) {
262 cmn_err(CE_WARN,
263 "XFS: %s option requires an argument",
264 this_char);
265 return EINVAL;
266 }
267 iosize = suffix_strtoul(value, &eov, 10);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100268 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100269 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
270 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
271 mp->m_flags |= XFS_MOUNT_GRPID;
272 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
273 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
274 mp->m_flags &= ~XFS_MOUNT_GRPID;
275 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100276 mp->m_flags |= XFS_MOUNT_WSYNC;
David Chinnera67d7c52007-11-23 16:29:32 +1100277 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100278 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
David Chinnera67d7c52007-11-23 16:29:32 +1100279 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100280 mp->m_flags |= XFS_MOUNT_NORECOVERY;
David Chinnera67d7c52007-11-23 16:29:32 +1100281 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100282 mp->m_flags |= XFS_MOUNT_NOALIGN;
David Chinnera67d7c52007-11-23 16:29:32 +1100283 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100284 mp->m_flags |= XFS_MOUNT_SWALLOC;
David Chinnera67d7c52007-11-23 16:29:32 +1100285 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
286 if (!value || !*value) {
287 cmn_err(CE_WARN,
288 "XFS: %s option requires an argument",
289 this_char);
290 return EINVAL;
291 }
292 dsunit = simple_strtoul(value, &eov, 10);
293 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
294 if (!value || !*value) {
295 cmn_err(CE_WARN,
296 "XFS: %s option requires an argument",
297 this_char);
298 return EINVAL;
299 }
300 dswidth = simple_strtoul(value, &eov, 10);
301 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100302 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100303#if !XFS_BIG_INUMS
304 cmn_err(CE_WARN,
305 "XFS: %s option not allowed on this system",
306 this_char);
307 return EINVAL;
308#endif
309 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100310 mp->m_flags |= XFS_MOUNT_NOUUID;
David Chinnera67d7c52007-11-23 16:29:32 +1100311 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100312 mp->m_flags |= XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100313 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100314 mp->m_flags &= ~XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100315 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100316 mp->m_flags |= XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100317 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100318 mp->m_flags &= ~XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100319 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100320 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100321 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100322 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100323 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100324 mp->m_flags |= XFS_MOUNT_ATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100325 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100326 mp->m_flags &= ~XFS_MOUNT_ATTR2;
327 mp->m_flags |= XFS_MOUNT_NOATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100328 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100329 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100330 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100331 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
332 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
Christoph Hellwig469fc232008-10-30 17:54:57 +1100333 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100334 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100335 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
336 !strcmp(this_char, MNTOPT_UQUOTA) ||
337 !strcmp(this_char, MNTOPT_USRQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100338 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
339 XFS_UQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100340 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
341 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100342 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
343 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100344 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
345 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100346 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
347 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100348 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100349 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
350 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100351 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
352 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100353 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
354 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100355 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100356 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
357 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
Dave Chinner71e330b2010-05-21 14:37:18 +1000358 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
359 mp->m_flags |= XFS_MOUNT_DELAYLOG;
360 cmn_err(CE_WARN,
361 "Enabling EXPERIMENTAL delayed logging feature "
362 "- use at your own risk.\n");
363 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
364 mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
David Chinnera67d7c52007-11-23 16:29:32 +1100365 } else if (!strcmp(this_char, "ihashsize")) {
366 cmn_err(CE_WARN,
367 "XFS: ihashsize no longer used, option is deprecated.");
368 } else if (!strcmp(this_char, "osyncisdsync")) {
369 /* no-op, this is now the default */
370 cmn_err(CE_WARN,
371 "XFS: osyncisdsync is now the default, option is deprecated.");
372 } else if (!strcmp(this_char, "irixsgid")) {
373 cmn_err(CE_WARN,
374 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
375 } else {
376 cmn_err(CE_WARN,
377 "XFS: unknown mount option [%s].", this_char);
378 return EINVAL;
379 }
380 }
381
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100382 /*
383 * no recovery flag requires a read-only mount
384 */
385 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
386 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
387 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
388 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100389 }
390
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100391 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
David Chinnera67d7c52007-11-23 16:29:32 +1100392 cmn_err(CE_WARN,
393 "XFS: sunit and swidth options incompatible with the noalign option");
394 return EINVAL;
395 }
396
Christoph Hellwig7d095252009-06-08 15:33:32 +0200397#ifndef CONFIG_XFS_QUOTA
398 if (XFS_IS_QUOTA_RUNNING(mp)) {
399 cmn_err(CE_WARN,
400 "XFS: quota support not available in this kernel.");
401 return EINVAL;
402 }
403#endif
404
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100405 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
406 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
David Chinnera67d7c52007-11-23 16:29:32 +1100407 cmn_err(CE_WARN,
408 "XFS: cannot mount with both project and group quota");
409 return EINVAL;
410 }
411
David Chinnera67d7c52007-11-23 16:29:32 +1100412 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
413 cmn_err(CE_WARN,
414 "XFS: sunit and swidth must be specified together");
415 return EINVAL;
416 }
417
418 if (dsunit && (dswidth % dsunit != 0)) {
419 cmn_err(CE_WARN,
420 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
421 dswidth, dsunit);
422 return EINVAL;
423 }
424
David Chinnera67d7c52007-11-23 16:29:32 +1100425done:
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100426 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
427 /*
428 * At this point the superblock has not been read
429 * in, therefore we do not know the block size.
430 * Before the mount call ends we will convert
431 * these to FSBs.
432 */
433 if (dsunit) {
434 mp->m_dalign = dsunit;
435 mp->m_flags |= XFS_MOUNT_RETERR;
436 }
437
438 if (dswidth)
439 mp->m_swidth = dswidth;
440 }
441
442 if (mp->m_logbufs != -1 &&
443 mp->m_logbufs != 0 &&
444 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
445 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
446 cmn_err(CE_WARN,
447 "XFS: invalid logbufs value: %d [not %d-%d]",
448 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
449 return XFS_ERROR(EINVAL);
450 }
451 if (mp->m_logbsize != -1 &&
452 mp->m_logbsize != 0 &&
453 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
454 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
455 !is_power_of_2(mp->m_logbsize))) {
456 cmn_err(CE_WARN,
457 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
458 mp->m_logbsize);
459 return XFS_ERROR(EINVAL);
460 }
461
462 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
463 if (!mp->m_fsname)
464 return ENOMEM;
465 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
466
467 if (iosizelog) {
468 if (iosizelog > XFS_MAX_IO_LOG ||
469 iosizelog < XFS_MIN_IO_LOG) {
470 cmn_err(CE_WARN,
471 "XFS: invalid log iosize: %d [not %d-%d]",
472 iosizelog, XFS_MIN_IO_LOG,
473 XFS_MAX_IO_LOG);
474 return XFS_ERROR(EINVAL);
475 }
476
477 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
478 mp->m_readio_log = iosizelog;
479 mp->m_writeio_log = iosizelog;
480 }
481
David Chinnera67d7c52007-11-23 16:29:32 +1100482 return 0;
483}
484
485struct proc_xfs_info {
486 int flag;
487 char *str;
488};
489
490STATIC int
491xfs_showargs(
492 struct xfs_mount *mp,
493 struct seq_file *m)
494{
495 static struct proc_xfs_info xfs_info_set[] = {
496 /* the few simple ones we can get from the mount struct */
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100497 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
David Chinnera67d7c52007-11-23 16:29:32 +1100498 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
David Chinnera67d7c52007-11-23 16:29:32 +1100499 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
500 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
501 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
502 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
503 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
504 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
505 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
David Chinnera67d7c52007-11-23 16:29:32 +1100506 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
Dave Chinner71e330b2010-05-21 14:37:18 +1000507 { XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
David Chinnera67d7c52007-11-23 16:29:32 +1100508 { 0, NULL }
509 };
510 static struct proc_xfs_info xfs_info_unset[] = {
511 /* the few simple ones we can get from the mount struct */
David Chinnera67d7c52007-11-23 16:29:32 +1100512 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
513 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
514 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
515 { 0, NULL }
516 };
517 struct proc_xfs_info *xfs_infop;
518
519 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
520 if (mp->m_flags & xfs_infop->flag)
521 seq_puts(m, xfs_infop->str);
522 }
523 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
524 if (!(mp->m_flags & xfs_infop->flag))
525 seq_puts(m, xfs_infop->str);
526 }
527
528 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
529 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
530 (int)(1 << mp->m_writeio_log) >> 10);
531
532 if (mp->m_logbufs > 0)
533 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
534 if (mp->m_logbsize > 0)
535 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
536
537 if (mp->m_logname)
538 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
539 if (mp->m_rtname)
540 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
541
542 if (mp->m_dalign > 0)
543 seq_printf(m, "," MNTOPT_SUNIT "=%d",
544 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
545 if (mp->m_swidth > 0)
546 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
547 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
548
549 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
550 seq_puts(m, "," MNTOPT_USRQUOTA);
551 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
552 seq_puts(m, "," MNTOPT_UQUOTANOENF);
553
Alex Elder988abe42009-09-02 17:02:24 -0500554 /* Either project or group quotas can be active, not both */
David Chinnera67d7c52007-11-23 16:29:32 +1100555
Alex Elder988abe42009-09-02 17:02:24 -0500556 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
557 if (mp->m_qflags & XFS_OQUOTA_ENFD)
558 seq_puts(m, "," MNTOPT_PRJQUOTA);
559 else
560 seq_puts(m, "," MNTOPT_PQUOTANOENF);
561 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
562 if (mp->m_qflags & XFS_OQUOTA_ENFD)
563 seq_puts(m, "," MNTOPT_GRPQUOTA);
564 else
565 seq_puts(m, "," MNTOPT_GQUOTANOENF);
566 }
David Chinnera67d7c52007-11-23 16:29:32 +1100567
568 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
569 seq_puts(m, "," MNTOPT_NOQUOTA);
570
571 return 0;
572}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573__uint64_t
574xfs_max_file_offset(
575 unsigned int blockshift)
576{
577 unsigned int pagefactor = 1;
578 unsigned int bitshift = BITS_PER_LONG - 1;
579
580 /* Figure out maximum filesize, on Linux this can depend on
581 * the filesystem blocksize (on 32 bit platforms).
582 * __block_prepare_write does this in an [unsigned] long...
583 * page->index << (PAGE_CACHE_SHIFT - bbits)
584 * So, for page sized blocks (4K on 32 bit platforms),
585 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
586 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
587 * but for smaller blocksizes it is less (bbits = log2 bsize).
588 * Note1: get_block_t takes a long (implicit cast from above)
589 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
590 * can optionally convert the [unsigned] long from above into
591 * an [unsigned] long long.
592 */
593
594#if BITS_PER_LONG == 32
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +0200595# if defined(CONFIG_LBDAF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 ASSERT(sizeof(sector_t) == 8);
597 pagefactor = PAGE_CACHE_SIZE;
598 bitshift = BITS_PER_LONG;
599# else
600 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
601# endif
602#endif
603
604 return (((__uint64_t)pagefactor) << bitshift) - 1;
605}
606
Hannes Eder3180e662009-03-04 19:34:10 +0100607STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608xfs_blkdev_get(
609 xfs_mount_t *mp,
610 const char *name,
611 struct block_device **bdevp)
612{
613 int error = 0;
614
Al Viro30c40d22008-02-22 19:50:45 -0500615 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 if (IS_ERR(*bdevp)) {
617 error = PTR_ERR(*bdevp);
618 printk("XFS: Invalid device [%s], error=%d\n", name, error);
619 }
620
621 return -error;
622}
623
Hannes Eder3180e662009-03-04 19:34:10 +0100624STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625xfs_blkdev_put(
626 struct block_device *bdev)
627{
628 if (bdev)
Al Viro30c40d22008-02-22 19:50:45 -0500629 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630}
631
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100632/*
633 * Try to write out the superblock using barriers.
634 */
635STATIC int
636xfs_barrier_test(
637 xfs_mount_t *mp)
638{
639 xfs_buf_t *sbp = xfs_getsb(mp, 0);
640 int error;
641
642 XFS_BUF_UNDONE(sbp);
643 XFS_BUF_UNREAD(sbp);
644 XFS_BUF_UNDELAYWRITE(sbp);
645 XFS_BUF_WRITE(sbp);
646 XFS_BUF_UNASYNC(sbp);
647 XFS_BUF_ORDERED(sbp);
648
649 xfsbdstrat(mp, sbp);
650 error = xfs_iowait(sbp);
651
652 /*
653 * Clear all the flags we set and possible error state in the
654 * buffer. We only did the write to try out whether barriers
655 * worked and shouldn't leave any traces in the superblock
656 * buffer.
657 */
658 XFS_BUF_DONE(sbp);
659 XFS_BUF_ERROR(sbp, 0);
660 XFS_BUF_UNORDERED(sbp);
661
662 xfs_buf_relse(sbp);
663 return error;
664}
665
Eric Sandeend96f8f82009-07-02 00:09:33 -0500666STATIC void
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100667xfs_mountfs_check_barriers(xfs_mount_t *mp)
668{
669 int error;
670
671 if (mp->m_logdev_targp != mp->m_ddev_targp) {
672 xfs_fs_cmn_err(CE_NOTE, mp,
673 "Disabling barriers, not supported with external log device");
674 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig4ef19dd2006-01-11 15:27:18 +1100675 return;
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100676 }
677
Nathan Scottb2ea4012006-07-28 17:05:13 +1000678 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
679 xfs_fs_cmn_err(CE_NOTE, mp,
680 "Disabling barriers, underlying device is readonly");
681 mp->m_flags &= ~XFS_MOUNT_BARRIER;
682 return;
683 }
684
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100685 error = xfs_barrier_test(mp);
686 if (error) {
687 xfs_fs_cmn_err(CE_NOTE, mp,
688 "Disabling barriers, trial barrier write failed");
689 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig4ef19dd2006-01-11 15:27:18 +1100690 return;
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100691 }
692}
693
694void
695xfs_blkdev_issue_flush(
696 xfs_buftarg_t *buftarg)
697{
Dmitry Monakhovfbd9b092010-04-28 17:55:06 +0400698 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL,
699 BLKDEV_IFL_WAIT);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100700}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000702STATIC void
703xfs_close_devices(
704 struct xfs_mount *mp)
705{
706 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000707 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500708 xfs_free_buftarg(mp, mp->m_logdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000709 xfs_blkdev_put(logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000710 }
711 if (mp->m_rtdev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000712 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500713 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000714 xfs_blkdev_put(rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000715 }
Christoph Hellwigb7963132009-03-03 14:48:37 -0500716 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000717}
718
719/*
720 * The file system configurations are:
721 * (1) device (partition) with data and internal log
722 * (2) logical volume with data and log subvolumes.
723 * (3) logical volume with data, log, and realtime subvolumes.
724 *
725 * We only have to handle opening the log and realtime volumes here if
726 * they are present. The data subvolume has already been opened by
727 * get_sb_bdev() and is stored in sb->s_bdev.
728 */
729STATIC int
730xfs_open_devices(
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100731 struct xfs_mount *mp)
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000732{
733 struct block_device *ddev = mp->m_super->s_bdev;
734 struct block_device *logdev = NULL, *rtdev = NULL;
735 int error;
736
737 /*
738 * Open real time and log devices - order is important.
739 */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100740 if (mp->m_logname) {
741 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000742 if (error)
743 goto out;
744 }
745
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100746 if (mp->m_rtname) {
747 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000748 if (error)
749 goto out_close_logdev;
750
751 if (rtdev == ddev || rtdev == logdev) {
752 cmn_err(CE_WARN,
753 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
754 error = EINVAL;
755 goto out_close_rtdev;
756 }
757 }
758
759 /*
760 * Setup xfs_mount buffer target pointers
761 */
762 error = ENOMEM;
Jan Engelhardte2a07812010-03-23 09:52:55 +1100763 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000764 if (!mp->m_ddev_targp)
765 goto out_close_rtdev;
766
767 if (rtdev) {
Jan Engelhardte2a07812010-03-23 09:52:55 +1100768 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000769 if (!mp->m_rtdev_targp)
770 goto out_free_ddev_targ;
771 }
772
773 if (logdev && logdev != ddev) {
Jan Engelhardte2a07812010-03-23 09:52:55 +1100774 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000775 if (!mp->m_logdev_targp)
776 goto out_free_rtdev_targ;
777 } else {
778 mp->m_logdev_targp = mp->m_ddev_targp;
779 }
780
781 return 0;
782
783 out_free_rtdev_targ:
784 if (mp->m_rtdev_targp)
Christoph Hellwigb7963132009-03-03 14:48:37 -0500785 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000786 out_free_ddev_targ:
Christoph Hellwigb7963132009-03-03 14:48:37 -0500787 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000788 out_close_rtdev:
789 if (rtdev)
790 xfs_blkdev_put(rtdev);
791 out_close_logdev:
792 if (logdev && logdev != ddev)
793 xfs_blkdev_put(logdev);
794 out:
795 return error;
796}
797
Christoph Hellwige34b5622008-05-20 15:10:36 +1000798/*
799 * Setup xfs_mount buffer target pointers based on superblock
800 */
801STATIC int
802xfs_setup_devices(
803 struct xfs_mount *mp)
804{
805 int error;
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000806
Christoph Hellwige34b5622008-05-20 15:10:36 +1000807 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
808 mp->m_sb.sb_sectsize);
809 if (error)
810 return error;
811
812 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
813 unsigned int log_sector_size = BBSIZE;
814
815 if (xfs_sb_version_hassector(&mp->m_sb))
816 log_sector_size = mp->m_sb.sb_logsectsize;
817 error = xfs_setsize_buftarg(mp->m_logdev_targp,
818 mp->m_sb.sb_blocksize,
819 log_sector_size);
820 if (error)
821 return error;
822 }
823 if (mp->m_rtdev_targp) {
824 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
825 mp->m_sb.sb_blocksize,
826 mp->m_sb.sb_sectsize);
827 if (error)
828 return error;
829 }
830
831 return 0;
832}
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000833
David Chinner249a8c12008-02-05 12:13:32 +1100834/*
835 * XFS AIL push thread support
836 */
837void
838xfsaild_wakeup(
David Chinner82fa9012008-10-30 17:38:26 +1100839 struct xfs_ail *ailp,
David Chinner249a8c12008-02-05 12:13:32 +1100840 xfs_lsn_t threshold_lsn)
841{
David Chinner82fa9012008-10-30 17:38:26 +1100842 ailp->xa_target = threshold_lsn;
843 wake_up_process(ailp->xa_task);
David Chinner249a8c12008-02-05 12:13:32 +1100844}
845
Hannes Eder3180e662009-03-04 19:34:10 +0100846STATIC int
David Chinner249a8c12008-02-05 12:13:32 +1100847xfsaild(
848 void *data)
849{
David Chinner82fa9012008-10-30 17:38:26 +1100850 struct xfs_ail *ailp = data;
David Chinner249a8c12008-02-05 12:13:32 +1100851 xfs_lsn_t last_pushed_lsn = 0;
Dave Chinner453eac82010-01-11 11:49:58 +0000852 long tout = 0; /* milliseconds */
David Chinner249a8c12008-02-05 12:13:32 +1100853
854 while (!kthread_should_stop()) {
Dave Chinner453eac82010-01-11 11:49:58 +0000855 schedule_timeout_interruptible(tout ?
856 msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
David Chinner249a8c12008-02-05 12:13:32 +1100857
858 /* swsusp */
859 try_to_freeze();
860
David Chinner82fa9012008-10-30 17:38:26 +1100861 ASSERT(ailp->xa_mount->m_log);
862 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
David Chinner249a8c12008-02-05 12:13:32 +1100863 continue;
864
David Chinner82fa9012008-10-30 17:38:26 +1100865 tout = xfsaild_push(ailp, &last_pushed_lsn);
David Chinner249a8c12008-02-05 12:13:32 +1100866 }
867
868 return 0;
869} /* xfsaild */
870
871int
872xfsaild_start(
David Chinner82fa9012008-10-30 17:38:26 +1100873 struct xfs_ail *ailp)
David Chinner249a8c12008-02-05 12:13:32 +1100874{
David Chinner82fa9012008-10-30 17:38:26 +1100875 ailp->xa_target = 0;
Jan Engelhardte2a07812010-03-23 09:52:55 +1100876 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
877 ailp->xa_mount->m_fsname);
David Chinner82fa9012008-10-30 17:38:26 +1100878 if (IS_ERR(ailp->xa_task))
879 return -PTR_ERR(ailp->xa_task);
David Chinner249a8c12008-02-05 12:13:32 +1100880 return 0;
881}
882
883void
884xfsaild_stop(
David Chinner82fa9012008-10-30 17:38:26 +1100885 struct xfs_ail *ailp)
David Chinner249a8c12008-02-05 12:13:32 +1100886{
David Chinner82fa9012008-10-30 17:38:26 +1100887 kthread_stop(ailp->xa_task);
David Chinner249a8c12008-02-05 12:13:32 +1100888}
889
890
David Chinnerbf904242008-10-30 17:36:14 +1100891/* Catch misguided souls that try to use this interface on XFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892STATIC struct inode *
Nathan Scotta50cd262006-03-14 14:06:18 +1100893xfs_fs_alloc_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 struct super_block *sb)
895{
David Chinnerbf904242008-10-30 17:36:14 +1100896 BUG();
Lachlan McIlroy493dca62008-10-30 17:36:52 +1100897 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898}
899
David Chinnerbf904242008-10-30 17:36:14 +1100900/*
David Chinner99fa8cb2008-10-30 17:36:40 +1100901 * Now that the generic code is guaranteed not to be accessing
902 * the linux inode, we can reclaim the inode.
David Chinnerbf904242008-10-30 17:36:14 +1100903 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100905xfs_fs_destroy_inode(
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000906 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907{
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000908 struct xfs_inode *ip = XFS_I(inode);
909
910 xfs_itrace_entry(ip);
David Chinner99fa8cb2008-10-30 17:36:40 +1100911
912 XFS_STATS_INC(vn_reclaim);
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000913
914 /* bad inode, get out here ASAP */
915 if (is_bad_inode(inode))
916 goto out_reclaim;
917
918 xfs_ioend_wait(ip);
919
920 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
921
922 /*
923 * We should never get here with one of the reclaim flags already set.
924 */
925 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
926 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
927
928 /*
Dave Chinner57817c62010-01-10 23:51:47 +0000929 * We always use background reclaim here because even if the
930 * inode is clean, it still may be under IO and hence we have
931 * to take the flush lock. The background reclaim path handles
932 * this more efficiently than we can here, so simply let background
933 * reclaim tear down all inodes.
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000934 */
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000935out_reclaim:
Dave Chinner57817c62010-01-10 23:51:47 +0000936 xfs_inode_set_reclaim_tag(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937}
938
David Chinner07c8f672008-10-30 16:11:59 +1100939/*
940 * Slab object creation initialisation for the XFS inode.
941 * This covers only the idempotent fields in the XFS inode;
942 * all other fields need to be initialised on allocation
943 * from the slab. This avoids the need to repeatedly intialise
944 * fields in the xfs inode that left in the initialise state
945 * when freeing the inode.
946 */
David Chinnerbf904242008-10-30 17:36:14 +1100947STATIC void
948xfs_fs_inode_init_once(
David Chinner07c8f672008-10-30 16:11:59 +1100949 void *inode)
950{
951 struct xfs_inode *ip = inode;
952
953 memset(ip, 0, sizeof(struct xfs_inode));
David Chinnerbf904242008-10-30 17:36:14 +1100954
955 /* vfs inode */
956 inode_init_once(VFS_I(ip));
957
958 /* xfs inode */
David Chinner07c8f672008-10-30 16:11:59 +1100959 atomic_set(&ip->i_iocount, 0);
960 atomic_set(&ip->i_pincount, 0);
961 spin_lock_init(&ip->i_flags_lock);
David Chinner07c8f672008-10-30 16:11:59 +1100962 init_waitqueue_head(&ip->i_ipin_wait);
963 /*
964 * Because we want to use a counting completion, complete
965 * the flush completion once to allow a single access to
966 * the flush completion without blocking.
967 */
968 init_completion(&ip->i_flush);
969 complete(&ip->i_flush);
970
971 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
972 "xfsino", ip->i_ino);
David Chinner07c8f672008-10-30 16:11:59 +1100973}
974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975/*
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000976 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
977 * we catch unlogged VFS level updates to the inode. Care must be taken
978 * here - the transaction code calls mark_inode_dirty_sync() to mark the
979 * VFS inode dirty in a transaction and clears the i_update_core field;
980 * it must clear the field after calling mark_inode_dirty_sync() to
981 * correctly indicate that the dirty state has been propagated into the
982 * inode log item.
983 *
984 * We need the barrier() to maintain correct ordering between unlogged
985 * updates and the transaction commit code that clears the i_update_core
986 * field. This requires all updates to be completed before marking the
987 * inode dirty.
988 */
989STATIC void
990xfs_fs_dirty_inode(
991 struct inode *inode)
992{
993 barrier();
994 XFS_I(inode)->i_update_core = 1;
995}
996
Christoph Hellwig07fec732010-02-09 11:43:49 +1100997STATIC int
998xfs_log_inode(
999 struct xfs_inode *ip)
1000{
1001 struct xfs_mount *mp = ip->i_mount;
1002 struct xfs_trans *tp;
1003 int error;
1004
1005 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1006 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
1007 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
1008
1009 if (error) {
1010 xfs_trans_cancel(tp, 0);
1011 /* we need to return with the lock hold shared */
1012 xfs_ilock(ip, XFS_ILOCK_SHARED);
1013 return error;
1014 }
1015
1016 xfs_ilock(ip, XFS_ILOCK_EXCL);
1017
1018 /*
1019 * Note - it's possible that we might have pushed ourselves out of the
1020 * way during trans_reserve which would flush the inode. But there's
1021 * no guarantee that the inode buffer has actually gone out yet (it's
1022 * delwri). Plus the buffer could be pinned anyway if it's part of
1023 * an inode in another recent transaction. So we play it safe and
1024 * fire off the transaction anyway.
1025 */
Christoph Hellwig898621d2010-06-24 11:36:58 +10001026 xfs_trans_ijoin(tp, ip);
Christoph Hellwig07fec732010-02-09 11:43:49 +11001027 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1028 xfs_trans_set_sync(tp);
1029 error = xfs_trans_commit(tp, 0);
1030 xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
1031
1032 return error;
1033}
1034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001036xfs_fs_write_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 struct inode *inode,
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001038 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039{
Dave Chinner2e656092008-11-28 14:23:33 +11001040 struct xfs_inode *ip = XFS_I(inode);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001041 struct xfs_mount *mp = ip->i_mount;
Christoph Hellwig07fec732010-02-09 11:43:49 +11001042 int error = EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
Dave Chinner2e656092008-11-28 14:23:33 +11001044 xfs_itrace_entry(ip);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001045
1046 if (XFS_FORCED_SHUTDOWN(mp))
1047 return XFS_ERROR(EIO);
1048
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001049 if (wbc->sync_mode == WB_SYNC_ALL) {
Christoph Hellwig07fec732010-02-09 11:43:49 +11001050 /*
1051 * Make sure the inode has hit stable storage. By using the
1052 * log and the fsync transactions we reduce the IOs we have
1053 * to do here from two (log and inode) to just the log.
1054 *
1055 * Note: We still need to do a delwri write of the inode after
1056 * this to flush it to the backing buffer so that bulkstat
1057 * works properly if this is the first time the inode has been
1058 * written. Because we hold the ilock atomically over the
1059 * transaction commit and the inode flush we are guaranteed
1060 * that the inode is not pinned when it returns. If the flush
1061 * lock is already held, then the inode has already been
1062 * flushed once and we don't need to flush it again. Hence
1063 * the code will only flush the inode if it isn't already
1064 * being flushed.
1065 */
Christoph Hellwig37bc5742010-04-20 17:00:59 +10001066 xfs_ioend_wait(ip);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001067 xfs_ilock(ip, XFS_ILOCK_SHARED);
Christoph Hellwig07fec732010-02-09 11:43:49 +11001068 if (ip->i_update_core) {
1069 error = xfs_log_inode(ip);
1070 if (error)
1071 goto out_unlock;
1072 }
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001073 } else {
Christoph Hellwig07fec732010-02-09 11:43:49 +11001074 /*
1075 * We make this non-blocking if the inode is contended, return
1076 * EAGAIN to indicate to the caller that they did not succeed.
1077 * This prevents the flush path from blocking on inodes inside
1078 * another operation right now, they get caught later by xfs_sync.
1079 */
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001080 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1081 goto out;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001082 }
1083
Christoph Hellwig07fec732010-02-09 11:43:49 +11001084 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1085 goto out_unlock;
1086
1087 /*
1088 * Now we have the flush lock and the inode is not pinned, we can check
1089 * if the inode is really clean as we know that there are no pending
1090 * transaction completions, it is not waiting on the delayed write
1091 * queue and there is no IO in progress.
1092 */
1093 if (xfs_inode_clean(ip)) {
1094 xfs_ifunlock(ip);
1095 error = 0;
1096 goto out_unlock;
1097 }
1098 error = xfs_iflush(ip, 0);
1099
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +01001100 out_unlock:
1101 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1102 out:
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001103 /*
1104 * if we failed to write out the inode then mark
1105 * it dirty again so we'll try again later.
1106 */
1107 if (error)
Dave Chinner2e656092008-11-28 14:23:33 +11001108 xfs_mark_inode_dirty_sync(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 return -error;
1110}
1111
1112STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +11001113xfs_fs_clear_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 struct inode *inode)
1115{
Christoph Hellwig1543d792007-08-29 11:46:47 +10001116 xfs_inode_t *ip = XFS_I(inode);
Christoph Hellwig56d433e2005-09-05 08:23:54 +10001117
David Chinner99fa8cb2008-10-30 17:36:40 +11001118 xfs_itrace_entry(ip);
1119 XFS_STATS_INC(vn_rele);
1120 XFS_STATS_INC(vn_remove);
1121 XFS_STATS_DEC(vn_active);
Christoph Hellwig56d433e2005-09-05 08:23:54 +10001122
Christoph Hellwig033da482009-10-19 04:05:26 +00001123 /*
1124 * The iolock is used by the file system to coordinate reads,
1125 * writes, and block truncates. Up to this point the lock
1126 * protected concurrent accesses by users of the inode. But
1127 * from here forward we're doing some final processing of the
1128 * inode because we're done with it, and although we reuse the
1129 * iolock for protection it is really a distinct lock class
1130 * (in the lockdep sense) from before. To keep lockdep happy
1131 * (and basically indicate what we are doing), we explicitly
1132 * re-init the iolock here.
1133 */
1134 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1135 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
1136
David Chinner99fa8cb2008-10-30 17:36:40 +11001137 xfs_inactive(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138}
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140STATIC void
Christoph Hellwiga7381592008-08-13 16:04:05 +10001141xfs_free_fsname(
1142 struct xfs_mount *mp)
1143{
1144 kfree(mp->m_fsname);
1145 kfree(mp->m_rtname);
1146 kfree(mp->m_logname);
1147}
1148
1149STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +11001150xfs_fs_put_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 struct super_block *sb)
1152{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001153 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
David Chinnera167b172008-10-30 17:06:18 +11001155 xfs_syncd_stop(mp);
Christoph Hellwig075fe102009-06-08 15:35:48 +02001156
1157 if (!(sb->s_flags & MS_RDONLY)) {
1158 /*
1159 * XXX(hch): this should be SYNC_WAIT.
1160 *
1161 * Or more likely not needed at all because the VFS is already
1162 * calling ->sync_fs after shutting down all filestem
1163 * operations and just before calling ->put_super.
1164 */
1165 xfs_sync_data(mp, 0);
1166 xfs_sync_attr(mp, 0);
1167 }
Christoph Hellwige48ad312008-05-20 11:30:52 +10001168
Christoph Hellwige48ad312008-05-20 11:30:52 +10001169 /*
1170 * Blow away any referenced inode in the filestreams cache.
1171 * This can and will cause log traffic as inodes go inactive
1172 * here.
1173 */
1174 xfs_filestream_unmount(mp);
1175
1176 XFS_bflush(mp->m_ddev_targp);
Christoph Hellwige48ad312008-05-20 11:30:52 +10001177
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001178 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001179 xfs_freesb(mp);
Dave Chinner9bf729c2010-04-29 09:55:50 +10001180 xfs_inode_shrinker_unregister(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001181 xfs_icsb_destroy_counters(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001182 xfs_close_devices(mp);
Christoph Hellwiga7381592008-08-13 16:04:05 +10001183 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001184 kfree(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185}
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187STATIC int
Christoph Hellwig69961a22009-10-06 20:29:28 +00001188xfs_fs_sync_fs(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 struct super_block *sb,
1190 int wait)
1191{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001192 struct xfs_mount *mp = XFS_M(sb);
Nathan Scottb83bd132006-06-09 16:48:30 +10001193 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001195 /*
Christoph Hellwig69961a22009-10-06 20:29:28 +00001196 * Not much we can do for the first async pass. Writing out the
1197 * superblock would be counter-productive as we are going to redirty
1198 * when writing out other data and metadata (and writing out a single
1199 * block is quite fast anyway).
1200 *
1201 * Try to asynchronously kick off quota syncing at least.
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001202 */
Christoph Hellwig69961a22009-10-06 20:29:28 +00001203 if (!wait) {
1204 xfs_qm_sync(mp, SYNC_TRYLOCK);
1205 return 0;
1206 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Christoph Hellwig69961a22009-10-06 20:29:28 +00001208 error = xfs_quiesce_data(mp);
1209 if (error)
1210 return -error;
1211
1212 if (laptop_mode) {
Christoph Hellwig74394492007-08-30 17:21:22 +10001213 int prev_sync_seq = mp->m_sync_seq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214
1215 /*
1216 * The disk must be active because we're syncing.
1217 * We schedule xfssyncd now (now that the disk is
1218 * active) instead of later (when it might not be).
1219 */
Christoph Hellwig74394492007-08-30 17:21:22 +10001220 wake_up_process(mp->m_sync_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 /*
1222 * We have to wait for the sync iteration to complete.
1223 * If we don't, the disk activity caused by the sync
1224 * will come after the sync is completed, and that
1225 * triggers another sync from laptop mode.
1226 */
Christoph Hellwig74394492007-08-30 17:21:22 +10001227 wait_event(mp->m_wait_single_sync_task,
1228 mp->m_sync_seq != prev_sync_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 }
1230
Christoph Hellwig69961a22009-10-06 20:29:28 +00001231 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232}
1233
1234STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001235xfs_fs_statfs(
David Howells726c3342006-06-23 02:02:58 -07001236 struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 struct kstatfs *statp)
1238{
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001239 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1240 xfs_sb_t *sbp = &mp->m_sb;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001241 struct xfs_inode *ip = XFS_I(dentry->d_inode);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001242 __uint64_t fakeinos, id;
1243 xfs_extlen_t lsize;
1244
1245 statp->f_type = XFS_SB_MAGIC;
1246 statp->f_namelen = MAXNAMELEN - 1;
1247
1248 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1249 statp->f_fsid.val[0] = (u32)id;
1250 statp->f_fsid.val[1] = (u32)(id >> 32);
1251
Christoph Hellwigd4d90b52008-04-22 17:34:37 +10001252 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001253
1254 spin_lock(&mp->m_sb_lock);
1255 statp->f_bsize = sbp->sb_blocksize;
1256 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1257 statp->f_blocks = sbp->sb_dblocks - lsize;
1258 statp->f_bfree = statp->f_bavail =
1259 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1260 fakeinos = statp->f_bfree << sbp->sb_inopblog;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001261 statp->f_files =
1262 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1263 if (mp->m_maxicount)
Christoph Hellwiga19d9f82009-03-29 09:51:08 +02001264 statp->f_files = min_t(typeof(statp->f_files),
1265 statp->f_files,
1266 mp->m_maxicount);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001267 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1268 spin_unlock(&mp->m_sb_lock);
1269
Christoph Hellwig7d095252009-06-08 15:33:32 +02001270 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1271 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1272 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1273 xfs_qm_statvfs(ip, statp);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001274 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275}
1276
Eric Sandeend5db0f92010-02-05 22:59:53 +00001277STATIC void
1278xfs_save_resvblks(struct xfs_mount *mp)
1279{
1280 __uint64_t resblks = 0;
1281
1282 mp->m_resblks_save = mp->m_resblks;
1283 xfs_reserve_blocks(mp, &resblks, NULL);
1284}
1285
1286STATIC void
1287xfs_restore_resvblks(struct xfs_mount *mp)
1288{
1289 __uint64_t resblks;
1290
1291 if (mp->m_resblks_save) {
1292 resblks = mp->m_resblks_save;
1293 mp->m_resblks_save = 0;
1294 } else
1295 resblks = xfs_default_resblks(mp);
1296
1297 xfs_reserve_blocks(mp, &resblks, NULL);
1298}
1299
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001301xfs_fs_remount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 struct super_block *sb,
1303 int *flags,
1304 char *options)
1305{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001306 struct xfs_mount *mp = XFS_M(sb);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001307 substring_t args[MAX_OPT_ARGS];
1308 char *p;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001309 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001311 while ((p = strsep(&options, ",")) != NULL) {
1312 int token;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001313
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001314 if (!*p)
1315 continue;
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001316
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001317 token = match_token(p, tokens, args);
1318 switch (token) {
1319 case Opt_barrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001320 mp->m_flags |= XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001321
1322 /*
1323 * Test if barriers are actually working if we can,
1324 * else delay this check until the filesystem is
1325 * marked writeable.
1326 */
1327 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1328 xfs_mountfs_check_barriers(mp);
1329 break;
1330 case Opt_nobarrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001331 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001332 break;
1333 default:
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001334 /*
1335 * Logically we would return an error here to prevent
1336 * users from believing they might have changed
1337 * mount options using remount which can't be changed.
1338 *
1339 * But unfortunately mount(8) adds all options from
1340 * mtab and fstab to the mount arguments in some cases
1341 * so we can't blindly reject options, but have to
1342 * check for each specified option if it actually
1343 * differs from the currently set option and only
1344 * reject it if that's the case.
1345 *
1346 * Until that is implemented we return success for
1347 * every remount request, and silently ignore all
1348 * options that we can't actually change.
1349 */
1350#if 0
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001351 printk(KERN_INFO
1352 "XFS: mount option \"%s\" not supported for remount\n", p);
1353 return -EINVAL;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001354#else
Christoph Hellwig6c5e51d2008-10-12 14:30:44 +02001355 break;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001356#endif
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001357 }
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001358 }
1359
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001360 /* ro -> rw */
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001361 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1362 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1363 if (mp->m_flags & XFS_MOUNT_BARRIER)
1364 xfs_mountfs_check_barriers(mp);
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001365
1366 /*
1367 * If this is the first remount to writeable state we
1368 * might have some superblock changes to update.
1369 */
1370 if (mp->m_update_flags) {
1371 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1372 if (error) {
1373 cmn_err(CE_WARN,
1374 "XFS: failed to write sb changes");
1375 return error;
1376 }
1377 mp->m_update_flags = 0;
1378 }
Dave Chinnercbe132a2010-01-26 15:08:49 +11001379
1380 /*
1381 * Fill out the reserve pool if it is empty. Use the stashed
1382 * value if it is non-zero, otherwise go with the default.
1383 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001384 xfs_restore_resvblks(mp);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001385 }
1386
1387 /* rw -> ro */
1388 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
Dave Chinnercbe132a2010-01-26 15:08:49 +11001389 /*
1390 * After we have synced the data but before we sync the
1391 * metadata, we need to free up the reserve block pool so that
1392 * the used block count in the superblock on disk is correct at
1393 * the end of the remount. Stash the current reserve pool size
1394 * so that if we get remounted rw, we can return it to the same
1395 * size.
1396 */
Dave Chinnercbe132a2010-01-26 15:08:49 +11001397
David Chinnere9f1c6e2008-10-30 17:15:50 +11001398 xfs_quiesce_data(mp);
Eric Sandeend5db0f92010-02-05 22:59:53 +00001399 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001400 xfs_quiesce_attr(mp);
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001401 mp->m_flags |= XFS_MOUNT_RDONLY;
1402 }
1403
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001404 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001407/*
1408 * Second stage of a freeze. The data is already frozen so we only
David Chinner76bf1052008-10-30 17:16:21 +11001409 * need to take care of the metadata. Once that's done write a dummy
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001410 * record to dirty the log in case of a crash while frozen.
1411 */
Takashi Satoc4be0c12009-01-09 16:40:58 -08001412STATIC int
1413xfs_fs_freeze(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 struct super_block *sb)
1415{
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001416 struct xfs_mount *mp = XFS_M(sb);
1417
Eric Sandeend5db0f92010-02-05 22:59:53 +00001418 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001419 xfs_quiesce_attr(mp);
Takashi Satoc4be0c12009-01-09 16:40:58 -08001420 return -xfs_fs_log_dummy(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421}
1422
1423STATIC int
Eric Sandeend5db0f92010-02-05 22:59:53 +00001424xfs_fs_unfreeze(
1425 struct super_block *sb)
1426{
1427 struct xfs_mount *mp = XFS_M(sb);
1428
1429 xfs_restore_resvblks(mp);
1430 return 0;
1431}
1432
1433STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001434xfs_fs_show_options(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 struct seq_file *m,
1436 struct vfsmount *mnt)
1437{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001438 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439}
1440
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001441/*
1442 * This function fills in xfs_mount_t fields based on mount args.
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001443 * Note: the superblock _has_ now been read in.
1444 */
1445STATIC int
1446xfs_finish_flags(
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001447 struct xfs_mount *mp)
1448{
1449 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1450
Frederik Schwarzer025dfda2008-10-16 19:02:37 +02001451 /* Fail a mount where the logbuf is smaller than the log stripe */
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001452 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001453 if (mp->m_logbsize <= 0 &&
1454 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001455 mp->m_logbsize = mp->m_sb.sb_logsunit;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001456 } else if (mp->m_logbsize > 0 &&
1457 mp->m_logbsize < mp->m_sb.sb_logsunit) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001458 cmn_err(CE_WARN,
1459 "XFS: logbuf size must be greater than or equal to log stripe size");
1460 return XFS_ERROR(EINVAL);
1461 }
1462 } else {
1463 /* Fail a mount if the logbuf is larger than 32K */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001464 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001465 cmn_err(CE_WARN,
1466 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1467 return XFS_ERROR(EINVAL);
1468 }
1469 }
1470
1471 /*
1472 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1473 * told by noattr2 to turn it off
1474 */
1475 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001476 !(mp->m_flags & XFS_MOUNT_NOATTR2))
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001477 mp->m_flags |= XFS_MOUNT_ATTR2;
1478
1479 /*
1480 * prohibit r/w mounts of read-only filesystems
1481 */
1482 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1483 cmn_err(CE_WARN,
1484 "XFS: cannot mount a read-only filesystem as read-write");
1485 return XFS_ERROR(EROFS);
1486 }
1487
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001488 return 0;
1489}
1490
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001492xfs_fs_fill_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 struct super_block *sb,
1494 void *data,
1495 int silent)
1496{
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001497 struct inode *root;
Christoph Hellwig745f6912007-08-30 17:20:39 +10001498 struct xfs_mount *mp = NULL;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001499 int flags = 0, error = ENOMEM;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001500
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001501 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1502 if (!mp)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001503 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001505 spin_lock_init(&mp->m_sb_lock);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001506 mutex_init(&mp->m_growlock);
1507 atomic_set(&mp->m_active_trans, 0);
Christoph Hellwig74394492007-08-30 17:21:22 +10001508 INIT_LIST_HEAD(&mp->m_sync_list);
1509 spin_lock_init(&mp->m_sync_lock);
1510 init_waitqueue_head(&mp->m_wait_single_sync_task);
1511
Christoph Hellwigb267ce92007-08-30 17:21:30 +10001512 mp->m_super = sb;
1513 sb->s_fs_info = mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514
Christoph Hellwig288699f2010-06-23 18:11:15 +10001515 error = xfs_parseargs(mp, (char *)data);
Christoph Hellwig745f6912007-08-30 17:20:39 +10001516 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001517 goto out_free_fsname;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
1519 sb_min_blocksize(sb, BBSIZE);
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001520 sb->s_xattr = xfs_xattr_handlers;
Nathan Scotta50cd262006-03-14 14:06:18 +11001521 sb->s_export_op = &xfs_export_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001522#ifdef CONFIG_XFS_QUOTA
Nathan Scotta50cd262006-03-14 14:06:18 +11001523 sb->s_qcop = &xfs_quotactl_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001524#endif
Nathan Scotta50cd262006-03-14 14:06:18 +11001525 sb->s_op = &xfs_super_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001527 if (silent)
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001528 flags |= XFS_MFSI_QUIET;
1529
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001530 error = xfs_open_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001531 if (error)
Christoph Hellwig288699f2010-06-23 18:11:15 +10001532 goto out_free_fsname;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001533
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001534 if (xfs_icsb_init_counters(mp))
1535 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1536
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001537 error = xfs_readsb(mp, flags);
1538 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001539 goto out_destroy_counters;
1540
1541 error = xfs_finish_flags(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001542 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001543 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001544
Christoph Hellwige34b5622008-05-20 15:10:36 +10001545 error = xfs_setup_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001546 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001547 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001548
1549 if (mp->m_flags & XFS_MOUNT_BARRIER)
1550 xfs_mountfs_check_barriers(mp);
1551
1552 error = xfs_filestream_mount(mp);
1553 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001554 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001555
Christoph Hellwig42490232008-08-13 16:49:32 +10001556 error = xfs_mountfs(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001557 if (error)
Christoph Hellwig120226c2008-05-20 15:11:11 +10001558 goto out_filestream_unmount;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001559
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001560 sb->s_magic = XFS_SB_MAGIC;
1561 sb->s_blocksize = mp->m_sb.sb_blocksize;
1562 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1564 sb->s_time_gran = 1;
1565 set_posix_acl_flag(sb);
1566
David Chinner01651642008-08-13 15:45:15 +10001567 root = igrab(VFS_I(mp->m_rootip));
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001568 if (!root) {
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001569 error = ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 goto fail_unmount;
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001571 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001572 if (is_bad_inode(root)) {
1573 error = EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 goto fail_vnrele;
1575 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001576 sb->s_root = d_alloc_root(root);
1577 if (!sb->s_root) {
1578 error = ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 goto fail_vnrele;
1580 }
Christoph Hellwig74394492007-08-30 17:21:22 +10001581
David Chinnera167b172008-10-30 17:06:18 +11001582 error = xfs_syncd_init(mp);
1583 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 goto fail_vnrele;
Christoph Hellwig74394492007-08-30 17:21:22 +10001585
Dave Chinner9bf729c2010-04-29 09:55:50 +10001586 xfs_inode_shrinker_register(mp);
1587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 return 0;
1589
Christoph Hellwig120226c2008-05-20 15:11:11 +10001590 out_filestream_unmount:
1591 xfs_filestream_unmount(mp);
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001592 out_free_sb:
1593 xfs_freesb(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001594 out_destroy_counters:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001595 xfs_icsb_destroy_counters(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001596 xfs_close_devices(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001597 out_free_fsname:
1598 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001599 kfree(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001600 out:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001601 return -error;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001602
1603 fail_vnrele:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 if (sb->s_root) {
1605 dput(sb->s_root);
1606 sb->s_root = NULL;
1607 } else {
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001608 iput(root);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609 }
1610
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001611 fail_unmount:
Christoph Hellwige48ad312008-05-20 11:30:52 +10001612 /*
1613 * Blow away any referenced inode in the filestreams cache.
1614 * This can and will cause log traffic as inodes go inactive
1615 * here.
1616 */
1617 xfs_filestream_unmount(mp);
1618
1619 XFS_bflush(mp->m_ddev_targp);
Christoph Hellwige48ad312008-05-20 11:30:52 +10001620
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001621 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001622 goto out_free_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623}
1624
David Howells454e2392006-06-23 02:02:57 -07001625STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001626xfs_fs_get_sb(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 struct file_system_type *fs_type,
1628 int flags,
1629 const char *dev_name,
David Howells454e2392006-06-23 02:02:57 -07001630 void *data,
1631 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632{
David Howells454e2392006-06-23 02:02:57 -07001633 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1634 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635}
1636
Alexey Dobriyanb87221d2009-09-21 17:01:09 -07001637static const struct super_operations xfs_super_operations = {
Nathan Scotta50cd262006-03-14 14:06:18 +11001638 .alloc_inode = xfs_fs_alloc_inode,
1639 .destroy_inode = xfs_fs_destroy_inode,
Christoph Hellwigf9581b12009-10-06 20:29:26 +00001640 .dirty_inode = xfs_fs_dirty_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001641 .write_inode = xfs_fs_write_inode,
1642 .clear_inode = xfs_fs_clear_inode,
1643 .put_super = xfs_fs_put_super,
Christoph Hellwig69961a22009-10-06 20:29:28 +00001644 .sync_fs = xfs_fs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -08001645 .freeze_fs = xfs_fs_freeze,
Eric Sandeend5db0f92010-02-05 22:59:53 +00001646 .unfreeze_fs = xfs_fs_unfreeze,
Nathan Scotta50cd262006-03-14 14:06:18 +11001647 .statfs = xfs_fs_statfs,
1648 .remount_fs = xfs_fs_remount,
1649 .show_options = xfs_fs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650};
1651
Andrew Morton5085b602007-02-20 13:57:47 -08001652static struct file_system_type xfs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 .owner = THIS_MODULE,
1654 .name = "xfs",
Nathan Scotta50cd262006-03-14 14:06:18 +11001655 .get_sb = xfs_fs_get_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 .kill_sb = kill_block_super,
1657 .fs_flags = FS_REQUIRES_DEV,
1658};
1659
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001660STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001661xfs_init_zones(void)
1662{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001663
1664 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1665 if (!xfs_ioend_zone)
David Chinnerbf904242008-10-30 17:36:14 +11001666 goto out;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001667
1668 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1669 xfs_ioend_zone);
1670 if (!xfs_ioend_pool)
1671 goto out_destroy_ioend_zone;
1672
1673 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1674 "xfs_log_ticket");
1675 if (!xfs_log_ticket_zone)
1676 goto out_destroy_ioend_pool;
1677
1678 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1679 "xfs_bmap_free_item");
1680 if (!xfs_bmap_free_item_zone)
1681 goto out_destroy_log_ticket_zone;
David Chinnerbf904242008-10-30 17:36:14 +11001682
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001683 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1684 "xfs_btree_cur");
1685 if (!xfs_btree_cur_zone)
1686 goto out_destroy_bmap_free_item_zone;
1687
1688 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1689 "xfs_da_state");
1690 if (!xfs_da_state_zone)
1691 goto out_destroy_btree_cur_zone;
1692
1693 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1694 if (!xfs_dabuf_zone)
1695 goto out_destroy_da_state_zone;
1696
1697 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1698 if (!xfs_ifork_zone)
1699 goto out_destroy_dabuf_zone;
1700
1701 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1702 if (!xfs_trans_zone)
1703 goto out_destroy_ifork_zone;
1704
Christoph Hellwige98c4142010-06-23 18:11:15 +10001705 xfs_log_item_desc_zone =
1706 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1707 "xfs_log_item_desc");
1708 if (!xfs_log_item_desc_zone)
1709 goto out_destroy_trans_zone;
1710
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001711 /*
1712 * The size of the zone allocated buf log item is the maximum
1713 * size possible under XFS. This wastes a little bit of memory,
1714 * but it is much faster.
1715 */
1716 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
Dave Chinnerc1155412010-05-07 11:05:19 +10001717 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001718 NBWORD) * sizeof(int))), "xfs_buf_item");
1719 if (!xfs_buf_item_zone)
Christoph Hellwige98c4142010-06-23 18:11:15 +10001720 goto out_destroy_log_item_desc_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001721
1722 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1723 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1724 sizeof(xfs_extent_t))), "xfs_efd_item");
1725 if (!xfs_efd_zone)
1726 goto out_destroy_buf_item_zone;
1727
1728 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1729 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1730 sizeof(xfs_extent_t))), "xfs_efi_item");
1731 if (!xfs_efi_zone)
1732 goto out_destroy_efd_zone;
1733
1734 xfs_inode_zone =
1735 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
David Chinnerbf904242008-10-30 17:36:14 +11001736 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1737 xfs_fs_inode_init_once);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001738 if (!xfs_inode_zone)
1739 goto out_destroy_efi_zone;
1740
1741 xfs_ili_zone =
1742 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1743 KM_ZONE_SPREAD, NULL);
1744 if (!xfs_ili_zone)
1745 goto out_destroy_inode_zone;
1746
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001747 return 0;
1748
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001749 out_destroy_inode_zone:
1750 kmem_zone_destroy(xfs_inode_zone);
1751 out_destroy_efi_zone:
1752 kmem_zone_destroy(xfs_efi_zone);
1753 out_destroy_efd_zone:
1754 kmem_zone_destroy(xfs_efd_zone);
1755 out_destroy_buf_item_zone:
1756 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001757 out_destroy_log_item_desc_zone:
1758 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001759 out_destroy_trans_zone:
1760 kmem_zone_destroy(xfs_trans_zone);
1761 out_destroy_ifork_zone:
1762 kmem_zone_destroy(xfs_ifork_zone);
1763 out_destroy_dabuf_zone:
1764 kmem_zone_destroy(xfs_dabuf_zone);
1765 out_destroy_da_state_zone:
1766 kmem_zone_destroy(xfs_da_state_zone);
1767 out_destroy_btree_cur_zone:
1768 kmem_zone_destroy(xfs_btree_cur_zone);
1769 out_destroy_bmap_free_item_zone:
1770 kmem_zone_destroy(xfs_bmap_free_item_zone);
1771 out_destroy_log_ticket_zone:
1772 kmem_zone_destroy(xfs_log_ticket_zone);
1773 out_destroy_ioend_pool:
1774 mempool_destroy(xfs_ioend_pool);
1775 out_destroy_ioend_zone:
1776 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001777 out:
1778 return -ENOMEM;
1779}
1780
1781STATIC void
1782xfs_destroy_zones(void)
1783{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001784 kmem_zone_destroy(xfs_ili_zone);
1785 kmem_zone_destroy(xfs_inode_zone);
1786 kmem_zone_destroy(xfs_efi_zone);
1787 kmem_zone_destroy(xfs_efd_zone);
1788 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001789 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001790 kmem_zone_destroy(xfs_trans_zone);
1791 kmem_zone_destroy(xfs_ifork_zone);
1792 kmem_zone_destroy(xfs_dabuf_zone);
1793 kmem_zone_destroy(xfs_da_state_zone);
1794 kmem_zone_destroy(xfs_btree_cur_zone);
1795 kmem_zone_destroy(xfs_bmap_free_item_zone);
1796 kmem_zone_destroy(xfs_log_ticket_zone);
1797 mempool_destroy(xfs_ioend_pool);
1798 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001799
1800}
1801
1802STATIC int __init
1803init_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804{
1805 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806
Christoph Hellwig65795912008-11-28 14:23:33 +11001807 printk(KERN_INFO XFS_VERSION_STRING " with "
1808 XFS_BUILD_OPTIONS " enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809
Christoph Hellwig25e41b32008-12-03 12:20:39 +01001810 xfs_ioend_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001811 xfs_dir_startup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812
Nathan Scott87582802006-03-14 13:18:19 +11001813 error = xfs_init_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001814 if (error)
1815 goto out;
1816
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001817 error = xfs_mru_cache_init();
1818 if (error)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001819 goto out_destroy_zones;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001820
1821 error = xfs_filestream_init();
1822 if (error)
1823 goto out_mru_cache_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824
Nathan Scottce8e9222006-01-11 15:39:08 +11001825 error = xfs_buf_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001826 if (error)
1827 goto out_filestream_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001829 error = xfs_init_procfs();
1830 if (error)
1831 goto out_buf_terminate;
1832
1833 error = xfs_sysctl_register();
1834 if (error)
1835 goto out_cleanup_procfs;
1836
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 vfs_initquota();
1838
1839 error = register_filesystem(&xfs_fs_type);
1840 if (error)
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001841 goto out_sysctl_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 return 0;
1843
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001844 out_sysctl_unregister:
1845 xfs_sysctl_unregister();
1846 out_cleanup_procfs:
1847 xfs_cleanup_procfs();
1848 out_buf_terminate:
Nathan Scottce8e9222006-01-11 15:39:08 +11001849 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001850 out_filestream_uninit:
1851 xfs_filestream_uninit();
1852 out_mru_cache_uninit:
1853 xfs_mru_cache_uninit();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001854 out_destroy_zones:
Nathan Scott87582802006-03-14 13:18:19 +11001855 xfs_destroy_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001856 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 return error;
1858}
1859
1860STATIC void __exit
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001861exit_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862{
1863 vfs_exitquota();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 unregister_filesystem(&xfs_fs_type);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001865 xfs_sysctl_unregister();
1866 xfs_cleanup_procfs();
Nathan Scottce8e9222006-01-11 15:39:08 +11001867 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001868 xfs_filestream_uninit();
1869 xfs_mru_cache_uninit();
Nathan Scott87582802006-03-14 13:18:19 +11001870 xfs_destroy_zones();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871}
1872
1873module_init(init_xfs_fs);
1874module_exit(exit_xfs_fs);
1875
1876MODULE_AUTHOR("Silicon Graphics, Inc.");
1877MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1878MODULE_LICENSE("GPL");