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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"
36#include "xfs_ialloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_rtalloc.h"
39#include "xfs_error.h"
40#include "xfs_itable.h"
Christoph Hellwig9909c4a2007-10-11 18:11:14 +100041#include "xfs_fsops.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include "xfs_attr.h"
43#include "xfs_buf_item.h"
44#include "xfs_utils.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100045#include "xfs_vnodeops.h"
David Chinnera67d7c52007-11-23 16:29:32 +110046#include "xfs_log_priv.h"
David Chinner249a8c12008-02-05 12:13:32 +110047#include "xfs_trans_priv.h"
Christoph Hellwig48b62a12008-05-20 11:30:39 +100048#include "xfs_filestream.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100049#include "xfs_da_btree.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100050#include "xfs_extfree_item.h"
51#include "xfs_mru_cache.h"
52#include "xfs_inode_item.h"
David Chinnerfe4fa4b2008-10-30 17:06:08 +110053#include "xfs_sync.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000054#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#include <linux/namei.h>
57#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090058#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/mount.h>
Christoph Hellwig0829c362005-09-02 16:58:49 +100060#include <linux/mempool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/writeback.h>
Christoph Hellwig4df08c52005-09-05 08:34:18 +100062#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080063#include <linux/freezer.h>
Christoph Hellwig62a877e2008-07-18 17:12:36 +100064#include <linux/parser.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Alexey Dobriyanb87221d2009-09-21 17:01:09 -070066static const struct super_operations xfs_super_operations;
David Chinner7989cb82007-02-10 18:34:56 +110067static kmem_zone_t *xfs_ioend_zone;
Christoph Hellwig0829c362005-09-02 16:58:49 +100068mempool_t *xfs_ioend_pool;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
David Chinnera67d7c52007-11-23 16:29:32 +110070#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
71#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
72#define MNTOPT_LOGDEV "logdev" /* log device */
73#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
74#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
75#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
David Chinnera67d7c52007-11-23 16:29:32 +110076#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
77#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
78#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
79#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
80#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
81#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
82#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
83#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
84#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
85#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
86#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
87#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
88#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
89 * unwritten extent conversion */
90#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
David Chinnera67d7c52007-11-23 16:29:32 +110091#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
92#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
93#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
94#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
95#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
96 * in stat(). */
97#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
98#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
99#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
100#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
101#define MNTOPT_NOQUOTA "noquota" /* no quotas */
102#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
103#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
104#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
105#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
106#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
107#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
108#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
109#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
110#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
111#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000112#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
113#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
114#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
115#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
David Chinnera67d7c52007-11-23 16:29:32 +1100116
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000117/*
118 * Table driven mount option parser.
119 *
120 * Currently only used for remount, but it will be used for mount
121 * in the future, too.
122 */
123enum {
124 Opt_barrier, Opt_nobarrier, Opt_err
125};
126
Steven Whitehousea447c092008-10-13 10:46:57 +0100127static const match_table_t tokens = {
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000128 {Opt_barrier, "barrier"},
129 {Opt_nobarrier, "nobarrier"},
130 {Opt_err, NULL}
131};
132
133
David Chinnera67d7c52007-11-23 16:29:32 +1100134STATIC unsigned long
135suffix_strtoul(char *s, char **endp, unsigned int base)
136{
137 int last, shift_left_factor = 0;
138 char *value = s;
139
140 last = strlen(value) - 1;
141 if (value[last] == 'K' || value[last] == 'k') {
142 shift_left_factor = 10;
143 value[last] = '\0';
144 }
145 if (value[last] == 'M' || value[last] == 'm') {
146 shift_left_factor = 20;
147 value[last] = '\0';
148 }
149 if (value[last] == 'G' || value[last] == 'g') {
150 shift_left_factor = 30;
151 value[last] = '\0';
152 }
153
154 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
155}
156
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100157/*
158 * This function fills in xfs_mount_t fields based on mount args.
159 * Note: the superblock has _not_ yet been read in.
160 *
161 * Note that this function leaks the various device name allocations on
162 * failure. The caller takes care of them.
163 */
David Chinnera67d7c52007-11-23 16:29:32 +1100164STATIC int
165xfs_parseargs(
166 struct xfs_mount *mp,
Christoph Hellwig288699f2010-06-23 18:11:15 +1000167 char *options)
David Chinnera67d7c52007-11-23 16:29:32 +1100168{
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100169 struct super_block *sb = mp->m_super;
David Chinnera67d7c52007-11-23 16:29:32 +1100170 char *this_char, *value, *eov;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100171 int dsunit = 0;
172 int dswidth = 0;
173 int iosize = 0;
Christoph Hellwiga5687782009-02-09 08:37:39 +0100174 __uint8_t iosizelog = 0;
David Chinnera67d7c52007-11-23 16:29:32 +1100175
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100176 /*
Dave Chinner4f107002011-03-07 10:00:35 +1100177 * set up the mount name first so all the errors will refer to the
178 * correct device.
179 */
180 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
181 if (!mp->m_fsname)
182 return ENOMEM;
183 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
184
185 /*
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100186 * 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;
David Chinnera67d7c52007-11-23 16:29:32 +1100208
209 if (!options)
210 goto done;
211
David Chinnera67d7c52007-11-23 16:29:32 +1100212 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) {
Dave Chinner4f107002011-03-07 10:00:35 +1100220 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100221 this_char);
222 return EINVAL;
223 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100224 mp->m_logbufs = simple_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100225 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
226 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100227 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100228 this_char);
229 return EINVAL;
230 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100231 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100232 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
233 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100234 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100235 this_char);
236 return EINVAL;
237 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100238 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
239 if (!mp->m_logname)
240 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100241 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100242 xfs_warn(mp, "%s option not allowed on this system",
Christoph Hellwig288699f2010-06-23 18:11:15 +1000243 this_char);
244 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100245 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
246 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100247 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100248 this_char);
249 return EINVAL;
250 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100251 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
252 if (!mp->m_rtname)
253 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100254 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
255 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100256 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100257 this_char);
258 return EINVAL;
259 }
260 iosize = simple_strtoul(value, &eov, 10);
Christoph Hellwig1ec79442008-10-30 17:55:08 +1100261 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100262 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
263 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100264 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100265 this_char);
266 return EINVAL;
267 }
268 iosize = suffix_strtoul(value, &eov, 10);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100269 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100270 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
271 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
272 mp->m_flags |= XFS_MOUNT_GRPID;
273 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
274 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
275 mp->m_flags &= ~XFS_MOUNT_GRPID;
276 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100277 mp->m_flags |= XFS_MOUNT_WSYNC;
David Chinnera67d7c52007-11-23 16:29:32 +1100278 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100279 mp->m_flags |= XFS_MOUNT_NORECOVERY;
David Chinnera67d7c52007-11-23 16:29:32 +1100280 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100281 mp->m_flags |= XFS_MOUNT_NOALIGN;
David Chinnera67d7c52007-11-23 16:29:32 +1100282 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100283 mp->m_flags |= XFS_MOUNT_SWALLOC;
David Chinnera67d7c52007-11-23 16:29:32 +1100284 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
285 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100286 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100287 this_char);
288 return EINVAL;
289 }
290 dsunit = simple_strtoul(value, &eov, 10);
291 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
292 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100293 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100294 this_char);
295 return EINVAL;
296 }
297 dswidth = simple_strtoul(value, &eov, 10);
298 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100299 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100300#if !XFS_BIG_INUMS
Dave Chinner4f107002011-03-07 10:00:35 +1100301 xfs_warn(mp, "%s option not allowed on this system",
David Chinnera67d7c52007-11-23 16:29:32 +1100302 this_char);
303 return EINVAL;
304#endif
305 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100306 mp->m_flags |= XFS_MOUNT_NOUUID;
David Chinnera67d7c52007-11-23 16:29:32 +1100307 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100308 mp->m_flags |= XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100309 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100310 mp->m_flags &= ~XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100311 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100312 mp->m_flags |= XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100313 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100314 mp->m_flags &= ~XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100315 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100316 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100317 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100318 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100319 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100320 mp->m_flags |= XFS_MOUNT_ATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100321 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100322 mp->m_flags &= ~XFS_MOUNT_ATTR2;
323 mp->m_flags |= XFS_MOUNT_NOATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100324 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100325 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100326 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100327 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
328 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
Christoph Hellwig469fc232008-10-30 17:54:57 +1100329 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100330 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100331 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
332 !strcmp(this_char, MNTOPT_UQUOTA) ||
333 !strcmp(this_char, MNTOPT_USRQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100334 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
335 XFS_UQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100336 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
337 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100338 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
339 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100340 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
341 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100342 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
343 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100344 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100345 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
346 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100347 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
348 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100349 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
350 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100351 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100352 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
353 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
Dave Chinner71e330b2010-05-21 14:37:18 +1000354 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
Christoph Hellwig242d6212011-08-24 05:57:51 +0000355 xfs_warn(mp,
Christoph Hellwig93b8a582011-12-06 21:58:07 +0000356 "delaylog is the default now, option is deprecated.");
357 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
358 xfs_warn(mp,
359 "nodelaylog support has been removed, option is deprecated.");
Christoph Hellwige84661a2011-05-20 13:45:32 +0000360 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
361 mp->m_flags |= XFS_MOUNT_DISCARD;
362 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
363 mp->m_flags &= ~XFS_MOUNT_DISCARD;
David Chinnera67d7c52007-11-23 16:29:32 +1100364 } else if (!strcmp(this_char, "ihashsize")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100365 xfs_warn(mp,
366 "ihashsize no longer used, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100367 } else if (!strcmp(this_char, "osyncisdsync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100368 xfs_warn(mp,
369 "osyncisdsync has no effect, option is deprecated.");
Christoph Hellwiga64afb02010-07-20 17:50:52 +1000370 } else if (!strcmp(this_char, "osyncisosync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100371 xfs_warn(mp,
372 "osyncisosync has no effect, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100373 } else if (!strcmp(this_char, "irixsgid")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100374 xfs_warn(mp,
375 "irixsgid is now a sysctl(2) variable, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100376 } else {
Dave Chinner4f107002011-03-07 10:00:35 +1100377 xfs_warn(mp, "unknown mount option [%s].", this_char);
David Chinnera67d7c52007-11-23 16:29:32 +1100378 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)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100387 xfs_warn(mp, "no-recovery mounts must be read-only.");
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100388 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)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100392 xfs_warn(mp,
393 "sunit and swidth options incompatible with the noalign option");
David Chinnera67d7c52007-11-23 16:29:32 +1100394 return EINVAL;
395 }
396
Christoph Hellwig7d095252009-06-08 15:33:32 +0200397#ifndef CONFIG_XFS_QUOTA
398 if (XFS_IS_QUOTA_RUNNING(mp)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100399 xfs_warn(mp, "quota support not available in this kernel.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200400 return EINVAL;
401 }
402#endif
403
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100404 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
405 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100406 xfs_warn(mp, "cannot mount with both project and group quota");
David Chinnera67d7c52007-11-23 16:29:32 +1100407 return EINVAL;
408 }
409
David Chinnera67d7c52007-11-23 16:29:32 +1100410 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100411 xfs_warn(mp, "sunit and swidth must be specified together");
David Chinnera67d7c52007-11-23 16:29:32 +1100412 return EINVAL;
413 }
414
415 if (dsunit && (dswidth % dsunit != 0)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100416 xfs_warn(mp,
417 "stripe width (%d) must be a multiple of the stripe unit (%d)",
David Chinnera67d7c52007-11-23 16:29:32 +1100418 dswidth, dsunit);
419 return EINVAL;
420 }
421
David Chinnera67d7c52007-11-23 16:29:32 +1100422done:
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100423 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
424 /*
425 * At this point the superblock has not been read
426 * in, therefore we do not know the block size.
427 * Before the mount call ends we will convert
428 * these to FSBs.
429 */
430 if (dsunit) {
431 mp->m_dalign = dsunit;
432 mp->m_flags |= XFS_MOUNT_RETERR;
433 }
434
435 if (dswidth)
436 mp->m_swidth = dswidth;
437 }
438
439 if (mp->m_logbufs != -1 &&
440 mp->m_logbufs != 0 &&
441 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
442 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100443 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100444 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
445 return XFS_ERROR(EINVAL);
446 }
447 if (mp->m_logbsize != -1 &&
448 mp->m_logbsize != 0 &&
449 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
450 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
451 !is_power_of_2(mp->m_logbsize))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100452 xfs_warn(mp,
453 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100454 mp->m_logbsize);
455 return XFS_ERROR(EINVAL);
456 }
457
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100458 if (iosizelog) {
459 if (iosizelog > XFS_MAX_IO_LOG ||
460 iosizelog < XFS_MIN_IO_LOG) {
Dave Chinner4f107002011-03-07 10:00:35 +1100461 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100462 iosizelog, XFS_MIN_IO_LOG,
463 XFS_MAX_IO_LOG);
464 return XFS_ERROR(EINVAL);
465 }
466
467 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
468 mp->m_readio_log = iosizelog;
469 mp->m_writeio_log = iosizelog;
470 }
471
David Chinnera67d7c52007-11-23 16:29:32 +1100472 return 0;
473}
474
475struct proc_xfs_info {
476 int flag;
477 char *str;
478};
479
480STATIC int
481xfs_showargs(
482 struct xfs_mount *mp,
483 struct seq_file *m)
484{
485 static struct proc_xfs_info xfs_info_set[] = {
486 /* the few simple ones we can get from the mount struct */
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100487 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
David Chinnera67d7c52007-11-23 16:29:32 +1100488 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
David Chinnera67d7c52007-11-23 16:29:32 +1100489 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
490 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
491 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
492 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
David Chinnera67d7c52007-11-23 16:29:32 +1100493 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
494 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
David Chinnera67d7c52007-11-23 16:29:32 +1100495 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
Christoph Hellwige84661a2011-05-20 13:45:32 +0000496 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
David Chinnera67d7c52007-11-23 16:29:32 +1100497 { 0, NULL }
498 };
499 static struct proc_xfs_info xfs_info_unset[] = {
500 /* the few simple ones we can get from the mount struct */
David Chinnera67d7c52007-11-23 16:29:32 +1100501 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
502 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
503 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
504 { 0, NULL }
505 };
506 struct proc_xfs_info *xfs_infop;
507
508 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
509 if (mp->m_flags & xfs_infop->flag)
510 seq_puts(m, xfs_infop->str);
511 }
512 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
513 if (!(mp->m_flags & xfs_infop->flag))
514 seq_puts(m, xfs_infop->str);
515 }
516
517 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
518 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
519 (int)(1 << mp->m_writeio_log) >> 10);
520
521 if (mp->m_logbufs > 0)
522 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
523 if (mp->m_logbsize > 0)
524 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
525
526 if (mp->m_logname)
527 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
528 if (mp->m_rtname)
529 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
530
531 if (mp->m_dalign > 0)
532 seq_printf(m, "," MNTOPT_SUNIT "=%d",
533 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
534 if (mp->m_swidth > 0)
535 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
536 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
537
538 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
539 seq_puts(m, "," MNTOPT_USRQUOTA);
540 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
541 seq_puts(m, "," MNTOPT_UQUOTANOENF);
542
Alex Elder988abe42009-09-02 17:02:24 -0500543 /* Either project or group quotas can be active, not both */
David Chinnera67d7c52007-11-23 16:29:32 +1100544
Alex Elder988abe42009-09-02 17:02:24 -0500545 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
546 if (mp->m_qflags & XFS_OQUOTA_ENFD)
547 seq_puts(m, "," MNTOPT_PRJQUOTA);
548 else
549 seq_puts(m, "," MNTOPT_PQUOTANOENF);
550 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
551 if (mp->m_qflags & XFS_OQUOTA_ENFD)
552 seq_puts(m, "," MNTOPT_GRPQUOTA);
553 else
554 seq_puts(m, "," MNTOPT_GQUOTANOENF);
555 }
David Chinnera67d7c52007-11-23 16:29:32 +1100556
557 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
558 seq_puts(m, "," MNTOPT_NOQUOTA);
559
560 return 0;
561}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562__uint64_t
563xfs_max_file_offset(
564 unsigned int blockshift)
565{
566 unsigned int pagefactor = 1;
567 unsigned int bitshift = BITS_PER_LONG - 1;
568
569 /* Figure out maximum filesize, on Linux this can depend on
570 * the filesystem blocksize (on 32 bit platforms).
Christoph Hellwigebdec242010-10-06 10:47:23 +0200571 * __block_write_begin does this in an [unsigned] long...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 * page->index << (PAGE_CACHE_SHIFT - bbits)
573 * So, for page sized blocks (4K on 32 bit platforms),
574 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
575 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
576 * but for smaller blocksizes it is less (bbits = log2 bsize).
577 * Note1: get_block_t takes a long (implicit cast from above)
578 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
579 * can optionally convert the [unsigned] long from above into
580 * an [unsigned] long long.
581 */
582
583#if BITS_PER_LONG == 32
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +0200584# if defined(CONFIG_LBDAF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 ASSERT(sizeof(sector_t) == 8);
586 pagefactor = PAGE_CACHE_SIZE;
587 bitshift = BITS_PER_LONG;
588# else
589 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
590# endif
591#endif
592
593 return (((__uint64_t)pagefactor) << bitshift) - 1;
594}
595
Hannes Eder3180e662009-03-04 19:34:10 +0100596STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597xfs_blkdev_get(
598 xfs_mount_t *mp,
599 const char *name,
600 struct block_device **bdevp)
601{
602 int error = 0;
603
Tejun Heod4d77622010-11-13 11:55:18 +0100604 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
605 mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 if (IS_ERR(*bdevp)) {
607 error = PTR_ERR(*bdevp);
Dave Chinner4f107002011-03-07 10:00:35 +1100608 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 }
610
611 return -error;
612}
613
Hannes Eder3180e662009-03-04 19:34:10 +0100614STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615xfs_blkdev_put(
616 struct block_device *bdev)
617{
618 if (bdev)
Tejun Heoe525fd82010-11-13 11:55:17 +0100619 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620}
621
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100622void
623xfs_blkdev_issue_flush(
624 xfs_buftarg_t *buftarg)
625{
Christoph Hellwigdd3932e2010-09-16 20:51:46 +0200626 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100627}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000629STATIC void
630xfs_close_devices(
631 struct xfs_mount *mp)
632{
633 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000634 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500635 xfs_free_buftarg(mp, mp->m_logdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000636 xfs_blkdev_put(logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000637 }
638 if (mp->m_rtdev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000639 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500640 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000641 xfs_blkdev_put(rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000642 }
Christoph Hellwigb7963132009-03-03 14:48:37 -0500643 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000644}
645
646/*
647 * The file system configurations are:
648 * (1) device (partition) with data and internal log
649 * (2) logical volume with data and log subvolumes.
650 * (3) logical volume with data, log, and realtime subvolumes.
651 *
652 * We only have to handle opening the log and realtime volumes here if
653 * they are present. The data subvolume has already been opened by
654 * get_sb_bdev() and is stored in sb->s_bdev.
655 */
656STATIC int
657xfs_open_devices(
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100658 struct xfs_mount *mp)
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000659{
660 struct block_device *ddev = mp->m_super->s_bdev;
661 struct block_device *logdev = NULL, *rtdev = NULL;
662 int error;
663
664 /*
665 * Open real time and log devices - order is important.
666 */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100667 if (mp->m_logname) {
668 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000669 if (error)
670 goto out;
671 }
672
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100673 if (mp->m_rtname) {
674 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000675 if (error)
676 goto out_close_logdev;
677
678 if (rtdev == ddev || rtdev == logdev) {
Dave Chinner4f107002011-03-07 10:00:35 +1100679 xfs_warn(mp,
680 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000681 error = EINVAL;
682 goto out_close_rtdev;
683 }
684 }
685
686 /*
687 * Setup xfs_mount buffer target pointers
688 */
689 error = ENOMEM;
Dave Chinnerebad8612010-09-22 10:47:20 +1000690 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000691 if (!mp->m_ddev_targp)
692 goto out_close_rtdev;
693
694 if (rtdev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000695 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
696 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000697 if (!mp->m_rtdev_targp)
698 goto out_free_ddev_targ;
699 }
700
701 if (logdev && logdev != ddev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000702 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
703 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000704 if (!mp->m_logdev_targp)
705 goto out_free_rtdev_targ;
706 } else {
707 mp->m_logdev_targp = mp->m_ddev_targp;
708 }
709
710 return 0;
711
712 out_free_rtdev_targ:
713 if (mp->m_rtdev_targp)
Christoph Hellwigb7963132009-03-03 14:48:37 -0500714 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000715 out_free_ddev_targ:
Christoph Hellwigb7963132009-03-03 14:48:37 -0500716 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000717 out_close_rtdev:
718 if (rtdev)
719 xfs_blkdev_put(rtdev);
720 out_close_logdev:
721 if (logdev && logdev != ddev)
722 xfs_blkdev_put(logdev);
723 out:
724 return error;
725}
726
Christoph Hellwige34b5622008-05-20 15:10:36 +1000727/*
728 * Setup xfs_mount buffer target pointers based on superblock
729 */
730STATIC int
731xfs_setup_devices(
732 struct xfs_mount *mp)
733{
734 int error;
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000735
Christoph Hellwige34b5622008-05-20 15:10:36 +1000736 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
737 mp->m_sb.sb_sectsize);
738 if (error)
739 return error;
740
741 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
742 unsigned int log_sector_size = BBSIZE;
743
744 if (xfs_sb_version_hassector(&mp->m_sb))
745 log_sector_size = mp->m_sb.sb_logsectsize;
746 error = xfs_setsize_buftarg(mp->m_logdev_targp,
747 mp->m_sb.sb_blocksize,
748 log_sector_size);
749 if (error)
750 return error;
751 }
752 if (mp->m_rtdev_targp) {
753 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
754 mp->m_sb.sb_blocksize,
755 mp->m_sb.sb_sectsize);
756 if (error)
757 return error;
758 }
759
760 return 0;
761}
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000762
David Chinnerbf904242008-10-30 17:36:14 +1100763/* Catch misguided souls that try to use this interface on XFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764STATIC struct inode *
Nathan Scotta50cd262006-03-14 14:06:18 +1100765xfs_fs_alloc_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 struct super_block *sb)
767{
David Chinnerbf904242008-10-30 17:36:14 +1100768 BUG();
Lachlan McIlroy493dca62008-10-30 17:36:52 +1100769 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770}
771
David Chinnerbf904242008-10-30 17:36:14 +1100772/*
David Chinner99fa8cb2008-10-30 17:36:40 +1100773 * Now that the generic code is guaranteed not to be accessing
774 * the linux inode, we can reclaim the inode.
David Chinnerbf904242008-10-30 17:36:14 +1100775 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100777xfs_fs_destroy_inode(
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000778 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000780 struct xfs_inode *ip = XFS_I(inode);
781
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000782 trace_xfs_destroy_inode(ip);
David Chinner99fa8cb2008-10-30 17:36:40 +1100783
784 XFS_STATS_INC(vn_reclaim);
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000785
786 /* bad inode, get out here ASAP */
787 if (is_bad_inode(inode))
788 goto out_reclaim;
789
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000790 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
791
792 /*
793 * We should never get here with one of the reclaim flags already set.
794 */
795 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
796 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
797
798 /*
Dave Chinner57817c62010-01-10 23:51:47 +0000799 * We always use background reclaim here because even if the
800 * inode is clean, it still may be under IO and hence we have
801 * to take the flush lock. The background reclaim path handles
802 * this more efficiently than we can here, so simply let background
803 * reclaim tear down all inodes.
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000804 */
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000805out_reclaim:
Dave Chinner57817c62010-01-10 23:51:47 +0000806 xfs_inode_set_reclaim_tag(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807}
808
David Chinner07c8f672008-10-30 16:11:59 +1100809/*
810 * Slab object creation initialisation for the XFS inode.
811 * This covers only the idempotent fields in the XFS inode;
812 * all other fields need to be initialised on allocation
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400813 * from the slab. This avoids the need to repeatedly initialise
David Chinner07c8f672008-10-30 16:11:59 +1100814 * fields in the xfs inode that left in the initialise state
815 * when freeing the inode.
816 */
David Chinnerbf904242008-10-30 17:36:14 +1100817STATIC void
818xfs_fs_inode_init_once(
David Chinner07c8f672008-10-30 16:11:59 +1100819 void *inode)
820{
821 struct xfs_inode *ip = inode;
822
823 memset(ip, 0, sizeof(struct xfs_inode));
David Chinnerbf904242008-10-30 17:36:14 +1100824
825 /* vfs inode */
826 inode_init_once(VFS_I(ip));
827
828 /* xfs inode */
David Chinner07c8f672008-10-30 16:11:59 +1100829 atomic_set(&ip->i_pincount, 0);
830 spin_lock_init(&ip->i_flags_lock);
David Chinner07c8f672008-10-30 16:11:59 +1100831
832 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
833 "xfsino", ip->i_ino);
David Chinner07c8f672008-10-30 16:11:59 +1100834}
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836/*
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000837 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
Dave Chinnerdcd79a12010-09-28 12:27:25 +1000838 * we catch unlogged VFS level updates to the inode.
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000839 *
840 * We need the barrier() to maintain correct ordering between unlogged
841 * updates and the transaction commit code that clears the i_update_core
842 * field. This requires all updates to be completed before marking the
843 * inode dirty.
844 */
845STATIC void
846xfs_fs_dirty_inode(
Christoph Hellwigaa385722011-05-27 06:53:02 -0400847 struct inode *inode,
848 int flags)
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000849{
850 barrier();
851 XFS_I(inode)->i_update_core = 1;
852}
853
Christoph Hellwig07fec732010-02-09 11:43:49 +1100854STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +1100855xfs_fs_write_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 struct inode *inode,
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100857 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
Dave Chinner2e656092008-11-28 14:23:33 +1100859 struct xfs_inode *ip = XFS_I(inode);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100860 struct xfs_mount *mp = ip->i_mount;
Christoph Hellwig07fec732010-02-09 11:43:49 +1100861 int error = EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000863 trace_xfs_write_inode(ip);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100864
865 if (XFS_FORCED_SHUTDOWN(mp))
Christoph Hellwig58d84c42011-08-27 05:57:55 +0000866 return -XFS_ERROR(EIO);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100867
Christoph Hellwig0b8fd302011-12-18 15:49:55 +0000868 if (wbc->sync_mode == WB_SYNC_ALL || wbc->for_kupdate) {
Christoph Hellwig07fec732010-02-09 11:43:49 +1100869 /*
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000870 * Make sure the inode has made it it into the log. Instead
871 * of forcing it all the way to stable storage using a
872 * synchronous transaction we let the log force inside the
873 * ->sync_fs call do that for thus, which reduces the number
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000874 * of synchronous log forces dramatically.
Christoph Hellwig07fec732010-02-09 11:43:49 +1100875 */
Christoph Hellwigbe4f1ac2011-12-20 20:08:41 +0000876 error = xfs_log_dirty_inode(ip, NULL, 0);
Christoph Hellwig58d84c42011-08-27 05:57:55 +0000877 if (error)
878 goto out;
879 return 0;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100880 } else {
Christoph Hellwigbe4f1ac2011-12-20 20:08:41 +0000881 if (!ip->i_update_core)
882 return 0;
883
Christoph Hellwig07fec732010-02-09 11:43:49 +1100884 /*
885 * We make this non-blocking if the inode is contended, return
886 * EAGAIN to indicate to the caller that they did not succeed.
887 * This prevents the flush path from blocking on inodes inside
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000888 * another operation right now, they get caught later by
889 * xfs_sync.
Christoph Hellwig07fec732010-02-09 11:43:49 +1100890 */
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100891 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
892 goto out;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100893
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000894 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
895 goto out_unlock;
Christoph Hellwig07fec732010-02-09 11:43:49 +1100896
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000897 /*
898 * Now we have the flush lock and the inode is not pinned, we
899 * can check if the inode is really clean as we know that
900 * there are no pending transaction completions, it is not
901 * waiting on the delayed write queue and there is no IO in
902 * progress.
903 */
904 if (xfs_inode_clean(ip)) {
905 xfs_ifunlock(ip);
906 error = 0;
907 goto out_unlock;
908 }
Dave Chinner1bfd8d02011-03-26 09:13:55 +1100909 error = xfs_iflush(ip, SYNC_TRYLOCK);
Christoph Hellwig07fec732010-02-09 11:43:49 +1100910 }
Christoph Hellwig07fec732010-02-09 11:43:49 +1100911
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100912 out_unlock:
913 xfs_iunlock(ip, XFS_ILOCK_SHARED);
914 out:
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000915 /*
916 * if we failed to write out the inode then mark
917 * it dirty again so we'll try again later.
918 */
919 if (error)
Dave Chinner2e656092008-11-28 14:23:33 +1100920 xfs_mark_inode_dirty_sync(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 return -error;
922}
923
924STATIC void
Al Virob57922d2010-06-07 14:34:48 -0400925xfs_fs_evict_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 struct inode *inode)
927{
Christoph Hellwig1543d792007-08-29 11:46:47 +1000928 xfs_inode_t *ip = XFS_I(inode);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000929
Al Virob57922d2010-06-07 14:34:48 -0400930 trace_xfs_evict_inode(ip);
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000931
Al Virob57922d2010-06-07 14:34:48 -0400932 truncate_inode_pages(&inode->i_data, 0);
933 end_writeback(inode);
David Chinner99fa8cb2008-10-30 17:36:40 +1100934 XFS_STATS_INC(vn_rele);
935 XFS_STATS_INC(vn_remove);
936 XFS_STATS_DEC(vn_active);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000937
Christoph Hellwig033da482009-10-19 04:05:26 +0000938 /*
939 * The iolock is used by the file system to coordinate reads,
940 * writes, and block truncates. Up to this point the lock
941 * protected concurrent accesses by users of the inode. But
942 * from here forward we're doing some final processing of the
943 * inode because we're done with it, and although we reuse the
944 * iolock for protection it is really a distinct lock class
945 * (in the lockdep sense) from before. To keep lockdep happy
946 * (and basically indicate what we are doing), we explicitly
947 * re-init the iolock here.
948 */
949 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
950 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
Dave Chinnerdcfcf202010-12-23 11:57:13 +1100951 lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
952 &xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
Christoph Hellwig033da482009-10-19 04:05:26 +0000953
David Chinner99fa8cb2008-10-30 17:36:40 +1100954 xfs_inactive(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955}
956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957STATIC void
Christoph Hellwiga7381592008-08-13 16:04:05 +1000958xfs_free_fsname(
959 struct xfs_mount *mp)
960{
961 kfree(mp->m_fsname);
962 kfree(mp->m_rtname);
963 kfree(mp->m_logname);
964}
965
966STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100967xfs_fs_put_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 struct super_block *sb)
969{
Christoph Hellwig745f6912007-08-30 17:20:39 +1000970 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
David Chinnera167b172008-10-30 17:06:18 +1100972 xfs_syncd_stop(mp);
Christoph Hellwig075fe102009-06-08 15:35:48 +0200973
Christoph Hellwige48ad312008-05-20 11:30:52 +1000974 /*
975 * Blow away any referenced inode in the filestreams cache.
976 * This can and will cause log traffic as inodes go inactive
977 * here.
978 */
979 xfs_filestream_unmount(mp);
980
Christoph Hellwiga9add832011-10-10 16:52:52 +0000981 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad312008-05-20 11:30:52 +1000982
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000983 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +1000984 xfs_freesb(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +1000985 xfs_icsb_destroy_counters(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000986 xfs_close_devices(mp);
Christoph Hellwiga7381592008-08-13 16:04:05 +1000987 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +1000988 kfree(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989}
990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991STATIC int
Christoph Hellwig69961a22009-10-06 20:29:28 +0000992xfs_fs_sync_fs(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 struct super_block *sb,
994 int wait)
995{
Christoph Hellwig745f6912007-08-30 17:20:39 +1000996 struct xfs_mount *mp = XFS_M(sb);
Nathan Scottb83bd132006-06-09 16:48:30 +1000997 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000999 /*
Christoph Hellwig34625c62011-12-06 21:58:12 +00001000 * Doing anything during the async pass would be counterproductive.
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001001 */
Christoph Hellwig34625c62011-12-06 21:58:12 +00001002 if (!wait)
Christoph Hellwig69961a22009-10-06 20:29:28 +00001003 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
Christoph Hellwig69961a22009-10-06 20:29:28 +00001005 error = xfs_quiesce_data(mp);
1006 if (error)
1007 return -error;
1008
1009 if (laptop_mode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 /*
1011 * The disk must be active because we're syncing.
1012 * We schedule xfssyncd now (now that the disk is
1013 * active) instead of later (when it might not be).
1014 */
Dave Chinnerc6d09b62011-04-08 12:45:07 +10001015 flush_delayed_work_sync(&mp->m_sync_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 }
1017
Christoph Hellwig69961a22009-10-06 20:29:28 +00001018 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019}
1020
1021STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001022xfs_fs_statfs(
David Howells726c3342006-06-23 02:02:58 -07001023 struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 struct kstatfs *statp)
1025{
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001026 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1027 xfs_sb_t *sbp = &mp->m_sb;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001028 struct xfs_inode *ip = XFS_I(dentry->d_inode);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001029 __uint64_t fakeinos, id;
1030 xfs_extlen_t lsize;
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001031 __int64_t ffree;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001032
1033 statp->f_type = XFS_SB_MAGIC;
1034 statp->f_namelen = MAXNAMELEN - 1;
1035
1036 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1037 statp->f_fsid.val[0] = (u32)id;
1038 statp->f_fsid.val[1] = (u32)(id >> 32);
1039
Christoph Hellwigd4d90b52008-04-22 17:34:37 +10001040 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001041
1042 spin_lock(&mp->m_sb_lock);
1043 statp->f_bsize = sbp->sb_blocksize;
1044 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1045 statp->f_blocks = sbp->sb_dblocks - lsize;
1046 statp->f_bfree = statp->f_bavail =
1047 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1048 fakeinos = statp->f_bfree << sbp->sb_inopblog;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001049 statp->f_files =
1050 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1051 if (mp->m_maxicount)
Christoph Hellwiga19d9f82009-03-29 09:51:08 +02001052 statp->f_files = min_t(typeof(statp->f_files),
1053 statp->f_files,
1054 mp->m_maxicount);
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001055
1056 /* make sure statp->f_ffree does not underflow */
1057 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1058 statp->f_ffree = max_t(__int64_t, ffree, 0);
1059
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001060 spin_unlock(&mp->m_sb_lock);
1061
Christoph Hellwig7d095252009-06-08 15:33:32 +02001062 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1063 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1064 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1065 xfs_qm_statvfs(ip, statp);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001066 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067}
1068
Eric Sandeend5db0f92010-02-05 22:59:53 +00001069STATIC void
1070xfs_save_resvblks(struct xfs_mount *mp)
1071{
1072 __uint64_t resblks = 0;
1073
1074 mp->m_resblks_save = mp->m_resblks;
1075 xfs_reserve_blocks(mp, &resblks, NULL);
1076}
1077
1078STATIC void
1079xfs_restore_resvblks(struct xfs_mount *mp)
1080{
1081 __uint64_t resblks;
1082
1083 if (mp->m_resblks_save) {
1084 resblks = mp->m_resblks_save;
1085 mp->m_resblks_save = 0;
1086 } else
1087 resblks = xfs_default_resblks(mp);
1088
1089 xfs_reserve_blocks(mp, &resblks, NULL);
1090}
1091
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001093xfs_fs_remount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 struct super_block *sb,
1095 int *flags,
1096 char *options)
1097{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001098 struct xfs_mount *mp = XFS_M(sb);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001099 substring_t args[MAX_OPT_ARGS];
1100 char *p;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001101 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001103 while ((p = strsep(&options, ",")) != NULL) {
1104 int token;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001105
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001106 if (!*p)
1107 continue;
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001108
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001109 token = match_token(p, tokens, args);
1110 switch (token) {
1111 case Opt_barrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001112 mp->m_flags |= XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001113 break;
1114 case Opt_nobarrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001115 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001116 break;
1117 default:
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001118 /*
1119 * Logically we would return an error here to prevent
1120 * users from believing they might have changed
1121 * mount options using remount which can't be changed.
1122 *
1123 * But unfortunately mount(8) adds all options from
1124 * mtab and fstab to the mount arguments in some cases
1125 * so we can't blindly reject options, but have to
1126 * check for each specified option if it actually
1127 * differs from the currently set option and only
1128 * reject it if that's the case.
1129 *
1130 * Until that is implemented we return success for
1131 * every remount request, and silently ignore all
1132 * options that we can't actually change.
1133 */
1134#if 0
Dave Chinner4f107002011-03-07 10:00:35 +11001135 xfs_info(mp,
1136 "mount option \"%s\" not supported for remount\n", p);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001137 return -EINVAL;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001138#else
Christoph Hellwig6c5e51d2008-10-12 14:30:44 +02001139 break;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001140#endif
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001141 }
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001142 }
1143
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001144 /* ro -> rw */
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001145 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1146 mp->m_flags &= ~XFS_MOUNT_RDONLY;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001147
1148 /*
1149 * If this is the first remount to writeable state we
1150 * might have some superblock changes to update.
1151 */
1152 if (mp->m_update_flags) {
1153 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1154 if (error) {
Dave Chinner4f107002011-03-07 10:00:35 +11001155 xfs_warn(mp, "failed to write sb changes");
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001156 return error;
1157 }
1158 mp->m_update_flags = 0;
1159 }
Dave Chinnercbe132a2010-01-26 15:08:49 +11001160
1161 /*
1162 * Fill out the reserve pool if it is empty. Use the stashed
1163 * value if it is non-zero, otherwise go with the default.
1164 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001165 xfs_restore_resvblks(mp);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001166 }
1167
1168 /* rw -> ro */
1169 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
Dave Chinnercbe132a2010-01-26 15:08:49 +11001170 /*
1171 * After we have synced the data but before we sync the
1172 * metadata, we need to free up the reserve block pool so that
1173 * the used block count in the superblock on disk is correct at
1174 * the end of the remount. Stash the current reserve pool size
1175 * so that if we get remounted rw, we can return it to the same
1176 * size.
1177 */
Dave Chinnercbe132a2010-01-26 15:08:49 +11001178
David Chinnere9f1c6e2008-10-30 17:15:50 +11001179 xfs_quiesce_data(mp);
Eric Sandeend5db0f92010-02-05 22:59:53 +00001180 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001181 xfs_quiesce_attr(mp);
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001182 mp->m_flags |= XFS_MOUNT_RDONLY;
1183 }
1184
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001185 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186}
1187
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001188/*
1189 * Second stage of a freeze. The data is already frozen so we only
David Chinner76bf1052008-10-30 17:16:21 +11001190 * need to take care of the metadata. Once that's done write a dummy
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001191 * record to dirty the log in case of a crash while frozen.
1192 */
Takashi Satoc4be0c12009-01-09 16:40:58 -08001193STATIC int
1194xfs_fs_freeze(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 struct super_block *sb)
1196{
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001197 struct xfs_mount *mp = XFS_M(sb);
1198
Eric Sandeend5db0f92010-02-05 22:59:53 +00001199 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001200 xfs_quiesce_attr(mp);
Dave Chinnerc58efdb2011-01-04 04:49:29 +00001201 return -xfs_fs_log_dummy(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202}
1203
1204STATIC int
Eric Sandeend5db0f92010-02-05 22:59:53 +00001205xfs_fs_unfreeze(
1206 struct super_block *sb)
1207{
1208 struct xfs_mount *mp = XFS_M(sb);
1209
1210 xfs_restore_resvblks(mp);
1211 return 0;
1212}
1213
1214STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001215xfs_fs_show_options(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 struct seq_file *m,
Al Viro34c80b12011-12-08 21:32:45 -05001217 struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218{
Al Viro34c80b12011-12-08 21:32:45 -05001219 return -xfs_showargs(XFS_M(root->d_sb), m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220}
1221
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001222/*
1223 * This function fills in xfs_mount_t fields based on mount args.
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001224 * Note: the superblock _has_ now been read in.
1225 */
1226STATIC int
1227xfs_finish_flags(
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001228 struct xfs_mount *mp)
1229{
1230 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1231
Frederik Schwarzer025dfda2008-10-16 19:02:37 +02001232 /* Fail a mount where the logbuf is smaller than the log stripe */
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001233 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001234 if (mp->m_logbsize <= 0 &&
1235 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001236 mp->m_logbsize = mp->m_sb.sb_logsunit;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001237 } else if (mp->m_logbsize > 0 &&
1238 mp->m_logbsize < mp->m_sb.sb_logsunit) {
Dave Chinner4f107002011-03-07 10:00:35 +11001239 xfs_warn(mp,
1240 "logbuf size must be greater than or equal to log stripe size");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001241 return XFS_ERROR(EINVAL);
1242 }
1243 } else {
1244 /* Fail a mount if the logbuf is larger than 32K */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001245 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
Dave Chinner4f107002011-03-07 10:00:35 +11001246 xfs_warn(mp,
1247 "logbuf size for version 1 logs must be 16K or 32K");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001248 return XFS_ERROR(EINVAL);
1249 }
1250 }
1251
1252 /*
1253 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1254 * told by noattr2 to turn it off
1255 */
1256 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001257 !(mp->m_flags & XFS_MOUNT_NOATTR2))
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001258 mp->m_flags |= XFS_MOUNT_ATTR2;
1259
1260 /*
1261 * prohibit r/w mounts of read-only filesystems
1262 */
1263 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
Dave Chinner4f107002011-03-07 10:00:35 +11001264 xfs_warn(mp,
1265 "cannot mount a read-only filesystem as read-write");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001266 return XFS_ERROR(EROFS);
1267 }
1268
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001269 return 0;
1270}
1271
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001273xfs_fs_fill_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 struct super_block *sb,
1275 void *data,
1276 int silent)
1277{
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001278 struct inode *root;
Christoph Hellwig745f6912007-08-30 17:20:39 +10001279 struct xfs_mount *mp = NULL;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001280 int flags = 0, error = ENOMEM;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001281
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001282 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1283 if (!mp)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001284 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001286 spin_lock_init(&mp->m_sb_lock);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001287 mutex_init(&mp->m_growlock);
1288 atomic_set(&mp->m_active_trans, 0);
Christoph Hellwig74394492007-08-30 17:21:22 +10001289
Christoph Hellwigb267ce92007-08-30 17:21:30 +10001290 mp->m_super = sb;
1291 sb->s_fs_info = mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
Christoph Hellwig288699f2010-06-23 18:11:15 +10001293 error = xfs_parseargs(mp, (char *)data);
Christoph Hellwig745f6912007-08-30 17:20:39 +10001294 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001295 goto out_free_fsname;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296
1297 sb_min_blocksize(sb, BBSIZE);
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001298 sb->s_xattr = xfs_xattr_handlers;
Nathan Scotta50cd262006-03-14 14:06:18 +11001299 sb->s_export_op = &xfs_export_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001300#ifdef CONFIG_XFS_QUOTA
Nathan Scotta50cd262006-03-14 14:06:18 +11001301 sb->s_qcop = &xfs_quotactl_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001302#endif
Nathan Scotta50cd262006-03-14 14:06:18 +11001303 sb->s_op = &xfs_super_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001305 if (silent)
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001306 flags |= XFS_MFSI_QUIET;
1307
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001308 error = xfs_open_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001309 if (error)
Christoph Hellwig288699f2010-06-23 18:11:15 +10001310 goto out_free_fsname;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001311
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001312 error = xfs_icsb_init_counters(mp);
1313 if (error)
1314 goto out_close_devices;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001315
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001316 error = xfs_readsb(mp, flags);
1317 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001318 goto out_destroy_counters;
1319
1320 error = xfs_finish_flags(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001321 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001322 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001323
Christoph Hellwige34b5622008-05-20 15:10:36 +10001324 error = xfs_setup_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001325 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001326 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001327
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001328 error = xfs_filestream_mount(mp);
1329 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001330 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001331
Dave Chinner704b2902011-03-26 09:14:57 +11001332 /*
1333 * we must configure the block size in the superblock before we run the
1334 * full mount process as the mount process can lookup and cache inodes.
1335 * For the same reason we must also initialise the syncd and register
1336 * the inode cache shrinker so that inodes can be reclaimed during
1337 * operations like a quotacheck that iterate all inodes in the
1338 * filesystem.
1339 */
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001340 sb->s_magic = XFS_SB_MAGIC;
1341 sb->s_blocksize = mp->m_sb.sb_blocksize;
1342 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1344 sb->s_time_gran = 1;
1345 set_posix_acl_flag(sb);
1346
Dave Chinner704b2902011-03-26 09:14:57 +11001347 error = xfs_mountfs(mp);
1348 if (error)
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001349 goto out_filestream_unmount;
1350
1351 error = xfs_syncd_init(mp);
1352 if (error)
1353 goto out_unmount;
Dave Chinner704b2902011-03-26 09:14:57 +11001354
David Chinner01651642008-08-13 15:45:15 +10001355 root = igrab(VFS_I(mp->m_rootip));
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001356 if (!root) {
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001357 error = ENOENT;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001358 goto out_syncd_stop;
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001359 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001360 if (is_bad_inode(root)) {
1361 error = EINVAL;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001362 goto out_syncd_stop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001364 sb->s_root = d_alloc_root(root);
1365 if (!sb->s_root) {
1366 error = ENOMEM;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001367 goto out_iput;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 }
Christoph Hellwig74394492007-08-30 17:21:22 +10001369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 return 0;
1371
Christoph Hellwig120226c2008-05-20 15:11:11 +10001372 out_filestream_unmount:
1373 xfs_filestream_unmount(mp);
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001374 out_free_sb:
1375 xfs_freesb(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001376 out_destroy_counters:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001377 xfs_icsb_destroy_counters(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001378 out_close_devices:
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001379 xfs_close_devices(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001380 out_free_fsname:
1381 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001382 kfree(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001383 out:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001384 return -error;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001385
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001386 out_iput:
1387 iput(root);
1388 out_syncd_stop:
Dave Chinner704b2902011-03-26 09:14:57 +11001389 xfs_syncd_stop(mp);
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001390 out_unmount:
Christoph Hellwige48ad312008-05-20 11:30:52 +10001391 /*
1392 * Blow away any referenced inode in the filestreams cache.
1393 * This can and will cause log traffic as inodes go inactive
1394 * here.
1395 */
1396 xfs_filestream_unmount(mp);
1397
Christoph Hellwiga9add832011-10-10 16:52:52 +00001398 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad312008-05-20 11:30:52 +10001399
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001400 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001401 goto out_free_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402}
1403
Al Viro152a0832010-07-25 00:46:55 +04001404STATIC struct dentry *
1405xfs_fs_mount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 struct file_system_type *fs_type,
1407 int flags,
1408 const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04001409 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410{
Al Viro152a0832010-07-25 00:46:55 +04001411 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412}
1413
Dave Chinner8daaa832011-07-08 14:14:46 +10001414static int
1415xfs_fs_nr_cached_objects(
1416 struct super_block *sb)
1417{
1418 return xfs_reclaim_inodes_count(XFS_M(sb));
1419}
1420
1421static void
1422xfs_fs_free_cached_objects(
1423 struct super_block *sb,
1424 int nr_to_scan)
1425{
1426 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1427}
1428
Alexey Dobriyanb87221d2009-09-21 17:01:09 -07001429static const struct super_operations xfs_super_operations = {
Nathan Scotta50cd262006-03-14 14:06:18 +11001430 .alloc_inode = xfs_fs_alloc_inode,
1431 .destroy_inode = xfs_fs_destroy_inode,
Christoph Hellwigf9581b12009-10-06 20:29:26 +00001432 .dirty_inode = xfs_fs_dirty_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001433 .write_inode = xfs_fs_write_inode,
Al Virob57922d2010-06-07 14:34:48 -04001434 .evict_inode = xfs_fs_evict_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001435 .put_super = xfs_fs_put_super,
Christoph Hellwig69961a22009-10-06 20:29:28 +00001436 .sync_fs = xfs_fs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -08001437 .freeze_fs = xfs_fs_freeze,
Eric Sandeend5db0f92010-02-05 22:59:53 +00001438 .unfreeze_fs = xfs_fs_unfreeze,
Nathan Scotta50cd262006-03-14 14:06:18 +11001439 .statfs = xfs_fs_statfs,
1440 .remount_fs = xfs_fs_remount,
1441 .show_options = xfs_fs_show_options,
Dave Chinner8daaa832011-07-08 14:14:46 +10001442 .nr_cached_objects = xfs_fs_nr_cached_objects,
1443 .free_cached_objects = xfs_fs_free_cached_objects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444};
1445
Andrew Morton5085b602007-02-20 13:57:47 -08001446static struct file_system_type xfs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 .owner = THIS_MODULE,
1448 .name = "xfs",
Al Viro152a0832010-07-25 00:46:55 +04001449 .mount = xfs_fs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 .kill_sb = kill_block_super,
1451 .fs_flags = FS_REQUIRES_DEV,
1452};
1453
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001454STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001455xfs_init_zones(void)
1456{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001457
1458 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1459 if (!xfs_ioend_zone)
David Chinnerbf904242008-10-30 17:36:14 +11001460 goto out;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001461
1462 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1463 xfs_ioend_zone);
1464 if (!xfs_ioend_pool)
1465 goto out_destroy_ioend_zone;
1466
1467 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1468 "xfs_log_ticket");
1469 if (!xfs_log_ticket_zone)
1470 goto out_destroy_ioend_pool;
1471
1472 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1473 "xfs_bmap_free_item");
1474 if (!xfs_bmap_free_item_zone)
1475 goto out_destroy_log_ticket_zone;
David Chinnerbf904242008-10-30 17:36:14 +11001476
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001477 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1478 "xfs_btree_cur");
1479 if (!xfs_btree_cur_zone)
1480 goto out_destroy_bmap_free_item_zone;
1481
1482 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1483 "xfs_da_state");
1484 if (!xfs_da_state_zone)
1485 goto out_destroy_btree_cur_zone;
1486
1487 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1488 if (!xfs_dabuf_zone)
1489 goto out_destroy_da_state_zone;
1490
1491 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1492 if (!xfs_ifork_zone)
1493 goto out_destroy_dabuf_zone;
1494
1495 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1496 if (!xfs_trans_zone)
1497 goto out_destroy_ifork_zone;
1498
Christoph Hellwige98c4142010-06-23 18:11:15 +10001499 xfs_log_item_desc_zone =
1500 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1501 "xfs_log_item_desc");
1502 if (!xfs_log_item_desc_zone)
1503 goto out_destroy_trans_zone;
1504
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001505 /*
1506 * The size of the zone allocated buf log item is the maximum
1507 * size possible under XFS. This wastes a little bit of memory,
1508 * but it is much faster.
1509 */
1510 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
Dave Chinnerc1155412010-05-07 11:05:19 +10001511 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001512 NBWORD) * sizeof(int))), "xfs_buf_item");
1513 if (!xfs_buf_item_zone)
Christoph Hellwige98c4142010-06-23 18:11:15 +10001514 goto out_destroy_log_item_desc_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001515
1516 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1517 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1518 sizeof(xfs_extent_t))), "xfs_efd_item");
1519 if (!xfs_efd_zone)
1520 goto out_destroy_buf_item_zone;
1521
1522 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1523 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1524 sizeof(xfs_extent_t))), "xfs_efi_item");
1525 if (!xfs_efi_zone)
1526 goto out_destroy_efd_zone;
1527
1528 xfs_inode_zone =
1529 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
David Chinnerbf904242008-10-30 17:36:14 +11001530 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1531 xfs_fs_inode_init_once);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001532 if (!xfs_inode_zone)
1533 goto out_destroy_efi_zone;
1534
1535 xfs_ili_zone =
1536 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1537 KM_ZONE_SPREAD, NULL);
1538 if (!xfs_ili_zone)
1539 goto out_destroy_inode_zone;
1540
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001541 return 0;
1542
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001543 out_destroy_inode_zone:
1544 kmem_zone_destroy(xfs_inode_zone);
1545 out_destroy_efi_zone:
1546 kmem_zone_destroy(xfs_efi_zone);
1547 out_destroy_efd_zone:
1548 kmem_zone_destroy(xfs_efd_zone);
1549 out_destroy_buf_item_zone:
1550 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001551 out_destroy_log_item_desc_zone:
1552 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001553 out_destroy_trans_zone:
1554 kmem_zone_destroy(xfs_trans_zone);
1555 out_destroy_ifork_zone:
1556 kmem_zone_destroy(xfs_ifork_zone);
1557 out_destroy_dabuf_zone:
1558 kmem_zone_destroy(xfs_dabuf_zone);
1559 out_destroy_da_state_zone:
1560 kmem_zone_destroy(xfs_da_state_zone);
1561 out_destroy_btree_cur_zone:
1562 kmem_zone_destroy(xfs_btree_cur_zone);
1563 out_destroy_bmap_free_item_zone:
1564 kmem_zone_destroy(xfs_bmap_free_item_zone);
1565 out_destroy_log_ticket_zone:
1566 kmem_zone_destroy(xfs_log_ticket_zone);
1567 out_destroy_ioend_pool:
1568 mempool_destroy(xfs_ioend_pool);
1569 out_destroy_ioend_zone:
1570 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001571 out:
1572 return -ENOMEM;
1573}
1574
1575STATIC void
1576xfs_destroy_zones(void)
1577{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001578 kmem_zone_destroy(xfs_ili_zone);
1579 kmem_zone_destroy(xfs_inode_zone);
1580 kmem_zone_destroy(xfs_efi_zone);
1581 kmem_zone_destroy(xfs_efd_zone);
1582 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001583 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001584 kmem_zone_destroy(xfs_trans_zone);
1585 kmem_zone_destroy(xfs_ifork_zone);
1586 kmem_zone_destroy(xfs_dabuf_zone);
1587 kmem_zone_destroy(xfs_da_state_zone);
1588 kmem_zone_destroy(xfs_btree_cur_zone);
1589 kmem_zone_destroy(xfs_bmap_free_item_zone);
1590 kmem_zone_destroy(xfs_log_ticket_zone);
1591 mempool_destroy(xfs_ioend_pool);
1592 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001593
1594}
1595
1596STATIC int __init
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001597xfs_init_workqueues(void)
1598{
1599 /*
Christoph Hellwig40d344e2011-12-05 08:53:21 +00001600 * We never want to the same work item to run twice, reclaiming inodes
1601 * or idling the log is not going to get any faster by multiple CPUs
1602 * competing for ressources. Use the default large max_active value
1603 * so that even lots of filesystems can perform these task in parallel.
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001604 */
Christoph Hellwig40d344e2011-12-05 08:53:21 +00001605 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0);
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001606 if (!xfs_syncd_wq)
Christoph Hellwig00308072011-10-11 11:14:10 -04001607 return -ENOMEM;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001608 return 0;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001609}
1610
Luck, Tony39411f82011-04-11 12:06:12 -07001611STATIC void
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001612xfs_destroy_workqueues(void)
1613{
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001614 destroy_workqueue(xfs_syncd_wq);
1615}
1616
1617STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001618init_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619{
1620 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
Christoph Hellwig65795912008-11-28 14:23:33 +11001622 printk(KERN_INFO XFS_VERSION_STRING " with "
1623 XFS_BUILD_OPTIONS " enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001625 xfs_dir_startup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626
Nathan Scott87582802006-03-14 13:18:19 +11001627 error = xfs_init_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001628 if (error)
1629 goto out;
1630
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001631 error = xfs_init_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001632 if (error)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001633 goto out_destroy_zones;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001634
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001635 error = xfs_mru_cache_init();
1636 if (error)
1637 goto out_destroy_wq;
1638
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001639 error = xfs_filestream_init();
1640 if (error)
1641 goto out_mru_cache_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642
Nathan Scottce8e9222006-01-11 15:39:08 +11001643 error = xfs_buf_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001644 if (error)
1645 goto out_filestream_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001647 error = xfs_init_procfs();
1648 if (error)
1649 goto out_buf_terminate;
1650
1651 error = xfs_sysctl_register();
1652 if (error)
1653 goto out_cleanup_procfs;
1654
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 vfs_initquota();
1656
1657 error = register_filesystem(&xfs_fs_type);
1658 if (error)
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001659 goto out_sysctl_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 return 0;
1661
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001662 out_sysctl_unregister:
1663 xfs_sysctl_unregister();
1664 out_cleanup_procfs:
1665 xfs_cleanup_procfs();
1666 out_buf_terminate:
Nathan Scottce8e9222006-01-11 15:39:08 +11001667 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001668 out_filestream_uninit:
1669 xfs_filestream_uninit();
1670 out_mru_cache_uninit:
1671 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001672 out_destroy_wq:
1673 xfs_destroy_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001674 out_destroy_zones:
Nathan Scott87582802006-03-14 13:18:19 +11001675 xfs_destroy_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001676 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 return error;
1678}
1679
1680STATIC void __exit
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001681exit_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682{
1683 vfs_exitquota();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 unregister_filesystem(&xfs_fs_type);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001685 xfs_sysctl_unregister();
1686 xfs_cleanup_procfs();
Nathan Scottce8e9222006-01-11 15:39:08 +11001687 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001688 xfs_filestream_uninit();
1689 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001690 xfs_destroy_workqueues();
Nathan Scott87582802006-03-14 13:18:19 +11001691 xfs_destroy_zones();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692}
1693
1694module_init(init_xfs_fs);
1695module_exit(exit_xfs_fs);
1696
1697MODULE_AUTHOR("Silicon Graphics, Inc.");
1698MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1699MODULE_LICENSE("GPL");