blob: dab9a5f6dfd68345646849f6ca391fa3849839bb [file] [log] [blame]
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)) {
Chandra Seetharaman4177af32012-01-23 17:31:43 +0000327 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
328 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
329 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
David Chinnera67d7c52007-11-23 16:29:32 +1100330 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
331 !strcmp(this_char, MNTOPT_UQUOTA) ||
332 !strcmp(this_char, MNTOPT_USRQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100333 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
334 XFS_UQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100335 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
336 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100337 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
338 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100339 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
340 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100341 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
342 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100343 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100344 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
345 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100346 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
347 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100348 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
349 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100350 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100351 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
352 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
Dave Chinner71e330b2010-05-21 14:37:18 +1000353 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
Christoph Hellwig242d6212011-08-24 05:57:51 +0000354 xfs_warn(mp,
Christoph Hellwig93b8a582011-12-06 21:58:07 +0000355 "delaylog is the default now, option is deprecated.");
356 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
357 xfs_warn(mp,
358 "nodelaylog support has been removed, option is deprecated.");
Christoph Hellwige84661a2011-05-20 13:45:32 +0000359 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
360 mp->m_flags |= XFS_MOUNT_DISCARD;
361 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
362 mp->m_flags &= ~XFS_MOUNT_DISCARD;
David Chinnera67d7c52007-11-23 16:29:32 +1100363 } else if (!strcmp(this_char, "ihashsize")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100364 xfs_warn(mp,
365 "ihashsize no longer used, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100366 } else if (!strcmp(this_char, "osyncisdsync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100367 xfs_warn(mp,
368 "osyncisdsync has no effect, option is deprecated.");
Christoph Hellwiga64afb02010-07-20 17:50:52 +1000369 } else if (!strcmp(this_char, "osyncisosync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100370 xfs_warn(mp,
371 "osyncisosync has no effect, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100372 } else if (!strcmp(this_char, "irixsgid")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100373 xfs_warn(mp,
374 "irixsgid is now a sysctl(2) variable, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100375 } else {
Dave Chinner4f107002011-03-07 10:00:35 +1100376 xfs_warn(mp, "unknown mount option [%s].", this_char);
David Chinnera67d7c52007-11-23 16:29:32 +1100377 return EINVAL;
378 }
379 }
380
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100381 /*
382 * no recovery flag requires a read-only mount
383 */
384 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
385 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100386 xfs_warn(mp, "no-recovery mounts must be read-only.");
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100387 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100388 }
389
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100390 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100391 xfs_warn(mp,
392 "sunit and swidth options incompatible with the noalign option");
David Chinnera67d7c52007-11-23 16:29:32 +1100393 return EINVAL;
394 }
395
Christoph Hellwig7d095252009-06-08 15:33:32 +0200396#ifndef CONFIG_XFS_QUOTA
397 if (XFS_IS_QUOTA_RUNNING(mp)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100398 xfs_warn(mp, "quota support not available in this kernel.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200399 return EINVAL;
400 }
401#endif
402
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100403 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
404 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100405 xfs_warn(mp, "cannot mount with both project and group quota");
David Chinnera67d7c52007-11-23 16:29:32 +1100406 return EINVAL;
407 }
408
David Chinnera67d7c52007-11-23 16:29:32 +1100409 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100410 xfs_warn(mp, "sunit and swidth must be specified together");
David Chinnera67d7c52007-11-23 16:29:32 +1100411 return EINVAL;
412 }
413
414 if (dsunit && (dswidth % dsunit != 0)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100415 xfs_warn(mp,
416 "stripe width (%d) must be a multiple of the stripe unit (%d)",
David Chinnera67d7c52007-11-23 16:29:32 +1100417 dswidth, dsunit);
418 return EINVAL;
419 }
420
David Chinnera67d7c52007-11-23 16:29:32 +1100421done:
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100422 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
423 /*
424 * At this point the superblock has not been read
425 * in, therefore we do not know the block size.
426 * Before the mount call ends we will convert
427 * these to FSBs.
428 */
429 if (dsunit) {
430 mp->m_dalign = dsunit;
431 mp->m_flags |= XFS_MOUNT_RETERR;
432 }
433
434 if (dswidth)
435 mp->m_swidth = dswidth;
436 }
437
438 if (mp->m_logbufs != -1 &&
439 mp->m_logbufs != 0 &&
440 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
441 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100442 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100443 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
444 return XFS_ERROR(EINVAL);
445 }
446 if (mp->m_logbsize != -1 &&
447 mp->m_logbsize != 0 &&
448 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
449 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
450 !is_power_of_2(mp->m_logbsize))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100451 xfs_warn(mp,
452 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100453 mp->m_logbsize);
454 return XFS_ERROR(EINVAL);
455 }
456
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100457 if (iosizelog) {
458 if (iosizelog > XFS_MAX_IO_LOG ||
459 iosizelog < XFS_MIN_IO_LOG) {
Dave Chinner4f107002011-03-07 10:00:35 +1100460 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100461 iosizelog, XFS_MIN_IO_LOG,
462 XFS_MAX_IO_LOG);
463 return XFS_ERROR(EINVAL);
464 }
465
466 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
467 mp->m_readio_log = iosizelog;
468 mp->m_writeio_log = iosizelog;
469 }
470
David Chinnera67d7c52007-11-23 16:29:32 +1100471 return 0;
472}
473
474struct proc_xfs_info {
475 int flag;
476 char *str;
477};
478
479STATIC int
480xfs_showargs(
481 struct xfs_mount *mp,
482 struct seq_file *m)
483{
484 static struct proc_xfs_info xfs_info_set[] = {
485 /* the few simple ones we can get from the mount struct */
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100486 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
David Chinnera67d7c52007-11-23 16:29:32 +1100487 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
David Chinnera67d7c52007-11-23 16:29:32 +1100488 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
489 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
490 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
491 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
David Chinnera67d7c52007-11-23 16:29:32 +1100492 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
493 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
David Chinnera67d7c52007-11-23 16:29:32 +1100494 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
Christoph Hellwige84661a2011-05-20 13:45:32 +0000495 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
David Chinnera67d7c52007-11-23 16:29:32 +1100496 { 0, NULL }
497 };
498 static struct proc_xfs_info xfs_info_unset[] = {
499 /* the few simple ones we can get from the mount struct */
David Chinnera67d7c52007-11-23 16:29:32 +1100500 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
501 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
502 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
503 { 0, NULL }
504 };
505 struct proc_xfs_info *xfs_infop;
506
507 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
508 if (mp->m_flags & xfs_infop->flag)
509 seq_puts(m, xfs_infop->str);
510 }
511 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
512 if (!(mp->m_flags & xfs_infop->flag))
513 seq_puts(m, xfs_infop->str);
514 }
515
516 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
517 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
518 (int)(1 << mp->m_writeio_log) >> 10);
519
520 if (mp->m_logbufs > 0)
521 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
522 if (mp->m_logbsize > 0)
523 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
524
525 if (mp->m_logname)
526 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
527 if (mp->m_rtname)
528 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
529
530 if (mp->m_dalign > 0)
531 seq_printf(m, "," MNTOPT_SUNIT "=%d",
532 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
533 if (mp->m_swidth > 0)
534 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
535 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
536
537 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
538 seq_puts(m, "," MNTOPT_USRQUOTA);
539 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
540 seq_puts(m, "," MNTOPT_UQUOTANOENF);
541
Alex Elder988abe42009-09-02 17:02:24 -0500542 /* Either project or group quotas can be active, not both */
David Chinnera67d7c52007-11-23 16:29:32 +1100543
Alex Elder988abe42009-09-02 17:02:24 -0500544 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
545 if (mp->m_qflags & XFS_OQUOTA_ENFD)
546 seq_puts(m, "," MNTOPT_PRJQUOTA);
547 else
548 seq_puts(m, "," MNTOPT_PQUOTANOENF);
549 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
550 if (mp->m_qflags & XFS_OQUOTA_ENFD)
551 seq_puts(m, "," MNTOPT_GRPQUOTA);
552 else
553 seq_puts(m, "," MNTOPT_GQUOTANOENF);
554 }
David Chinnera67d7c52007-11-23 16:29:32 +1100555
556 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
557 seq_puts(m, "," MNTOPT_NOQUOTA);
558
559 return 0;
560}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561__uint64_t
562xfs_max_file_offset(
563 unsigned int blockshift)
564{
565 unsigned int pagefactor = 1;
566 unsigned int bitshift = BITS_PER_LONG - 1;
567
568 /* Figure out maximum filesize, on Linux this can depend on
569 * the filesystem blocksize (on 32 bit platforms).
Christoph Hellwigebdec242010-10-06 10:47:23 +0200570 * __block_write_begin does this in an [unsigned] long...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 * page->index << (PAGE_CACHE_SHIFT - bbits)
572 * So, for page sized blocks (4K on 32 bit platforms),
573 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
574 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
575 * but for smaller blocksizes it is less (bbits = log2 bsize).
576 * Note1: get_block_t takes a long (implicit cast from above)
577 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
578 * can optionally convert the [unsigned] long from above into
579 * an [unsigned] long long.
580 */
581
582#if BITS_PER_LONG == 32
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +0200583# if defined(CONFIG_LBDAF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 ASSERT(sizeof(sector_t) == 8);
585 pagefactor = PAGE_CACHE_SIZE;
586 bitshift = BITS_PER_LONG;
587# else
588 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
589# endif
590#endif
591
592 return (((__uint64_t)pagefactor) << bitshift) - 1;
593}
594
Hannes Eder3180e662009-03-04 19:34:10 +0100595STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596xfs_blkdev_get(
597 xfs_mount_t *mp,
598 const char *name,
599 struct block_device **bdevp)
600{
601 int error = 0;
602
Tejun Heod4d77622010-11-13 11:55:18 +0100603 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
604 mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 if (IS_ERR(*bdevp)) {
606 error = PTR_ERR(*bdevp);
Dave Chinner4f107002011-03-07 10:00:35 +1100607 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 }
609
610 return -error;
611}
612
Hannes Eder3180e662009-03-04 19:34:10 +0100613STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614xfs_blkdev_put(
615 struct block_device *bdev)
616{
617 if (bdev)
Tejun Heoe525fd82010-11-13 11:55:17 +0100618 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619}
620
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100621void
622xfs_blkdev_issue_flush(
623 xfs_buftarg_t *buftarg)
624{
Christoph Hellwigdd3932e2010-09-16 20:51:46 +0200625 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100626}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000628STATIC void
629xfs_close_devices(
630 struct xfs_mount *mp)
631{
632 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000633 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500634 xfs_free_buftarg(mp, mp->m_logdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000635 xfs_blkdev_put(logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000636 }
637 if (mp->m_rtdev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000638 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500639 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000640 xfs_blkdev_put(rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000641 }
Christoph Hellwigb7963132009-03-03 14:48:37 -0500642 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000643}
644
645/*
646 * The file system configurations are:
647 * (1) device (partition) with data and internal log
648 * (2) logical volume with data and log subvolumes.
649 * (3) logical volume with data, log, and realtime subvolumes.
650 *
651 * We only have to handle opening the log and realtime volumes here if
652 * they are present. The data subvolume has already been opened by
653 * get_sb_bdev() and is stored in sb->s_bdev.
654 */
655STATIC int
656xfs_open_devices(
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100657 struct xfs_mount *mp)
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000658{
659 struct block_device *ddev = mp->m_super->s_bdev;
660 struct block_device *logdev = NULL, *rtdev = NULL;
661 int error;
662
663 /*
664 * Open real time and log devices - order is important.
665 */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100666 if (mp->m_logname) {
667 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000668 if (error)
669 goto out;
670 }
671
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100672 if (mp->m_rtname) {
673 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000674 if (error)
675 goto out_close_logdev;
676
677 if (rtdev == ddev || rtdev == logdev) {
Dave Chinner4f107002011-03-07 10:00:35 +1100678 xfs_warn(mp,
679 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000680 error = EINVAL;
681 goto out_close_rtdev;
682 }
683 }
684
685 /*
686 * Setup xfs_mount buffer target pointers
687 */
688 error = ENOMEM;
Dave Chinnerebad8612010-09-22 10:47:20 +1000689 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000690 if (!mp->m_ddev_targp)
691 goto out_close_rtdev;
692
693 if (rtdev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000694 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
695 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000696 if (!mp->m_rtdev_targp)
697 goto out_free_ddev_targ;
698 }
699
700 if (logdev && logdev != ddev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000701 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
702 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000703 if (!mp->m_logdev_targp)
704 goto out_free_rtdev_targ;
705 } else {
706 mp->m_logdev_targp = mp->m_ddev_targp;
707 }
708
709 return 0;
710
711 out_free_rtdev_targ:
712 if (mp->m_rtdev_targp)
Christoph Hellwigb7963132009-03-03 14:48:37 -0500713 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000714 out_free_ddev_targ:
Christoph Hellwigb7963132009-03-03 14:48:37 -0500715 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000716 out_close_rtdev:
717 if (rtdev)
718 xfs_blkdev_put(rtdev);
719 out_close_logdev:
720 if (logdev && logdev != ddev)
721 xfs_blkdev_put(logdev);
722 out:
723 return error;
724}
725
Christoph Hellwige34b5622008-05-20 15:10:36 +1000726/*
727 * Setup xfs_mount buffer target pointers based on superblock
728 */
729STATIC int
730xfs_setup_devices(
731 struct xfs_mount *mp)
732{
733 int error;
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000734
Christoph Hellwige34b5622008-05-20 15:10:36 +1000735 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
736 mp->m_sb.sb_sectsize);
737 if (error)
738 return error;
739
740 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
741 unsigned int log_sector_size = BBSIZE;
742
743 if (xfs_sb_version_hassector(&mp->m_sb))
744 log_sector_size = mp->m_sb.sb_logsectsize;
745 error = xfs_setsize_buftarg(mp->m_logdev_targp,
746 mp->m_sb.sb_blocksize,
747 log_sector_size);
748 if (error)
749 return error;
750 }
751 if (mp->m_rtdev_targp) {
752 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
753 mp->m_sb.sb_blocksize,
754 mp->m_sb.sb_sectsize);
755 if (error)
756 return error;
757 }
758
759 return 0;
760}
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000761
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000762STATIC int
763xfs_init_mount_workqueues(
764 struct xfs_mount *mp)
765{
766 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
767 WQ_MEM_RECLAIM, 0, mp->m_fsname);
768 if (!mp->m_data_workqueue)
769 goto out;
770
771 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
772 WQ_MEM_RECLAIM, 0, mp->m_fsname);
773 if (!mp->m_unwritten_workqueue)
774 goto out_destroy_data_iodone_queue;
775
776 return 0;
777
778out_destroy_data_iodone_queue:
779 destroy_workqueue(mp->m_data_workqueue);
780out:
781 return -ENOMEM;
782}
783
784STATIC void
785xfs_destroy_mount_workqueues(
786 struct xfs_mount *mp)
787{
788 destroy_workqueue(mp->m_data_workqueue);
789 destroy_workqueue(mp->m_unwritten_workqueue);
790}
791
David Chinnerbf904242008-10-30 17:36:14 +1100792/* Catch misguided souls that try to use this interface on XFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793STATIC struct inode *
Nathan Scotta50cd262006-03-14 14:06:18 +1100794xfs_fs_alloc_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 struct super_block *sb)
796{
David Chinnerbf904242008-10-30 17:36:14 +1100797 BUG();
Lachlan McIlroy493dca62008-10-30 17:36:52 +1100798 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799}
800
David Chinnerbf904242008-10-30 17:36:14 +1100801/*
David Chinner99fa8cb2008-10-30 17:36:40 +1100802 * Now that the generic code is guaranteed not to be accessing
803 * the linux inode, we can reclaim the inode.
David Chinnerbf904242008-10-30 17:36:14 +1100804 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100806xfs_fs_destroy_inode(
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000807 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808{
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000809 struct xfs_inode *ip = XFS_I(inode);
810
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000811 trace_xfs_destroy_inode(ip);
David Chinner99fa8cb2008-10-30 17:36:40 +1100812
813 XFS_STATS_INC(vn_reclaim);
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000814
815 /* bad inode, get out here ASAP */
816 if (is_bad_inode(inode))
817 goto out_reclaim;
818
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000819 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
820
821 /*
822 * We should never get here with one of the reclaim flags already set.
823 */
824 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
825 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
826
827 /*
Dave Chinner57817c62010-01-10 23:51:47 +0000828 * We always use background reclaim here because even if the
829 * inode is clean, it still may be under IO and hence we have
830 * to take the flush lock. The background reclaim path handles
831 * this more efficiently than we can here, so simply let background
832 * reclaim tear down all inodes.
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000833 */
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000834out_reclaim:
Dave Chinner57817c62010-01-10 23:51:47 +0000835 xfs_inode_set_reclaim_tag(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836}
837
David Chinner07c8f672008-10-30 16:11:59 +1100838/*
839 * Slab object creation initialisation for the XFS inode.
840 * This covers only the idempotent fields in the XFS inode;
841 * all other fields need to be initialised on allocation
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400842 * from the slab. This avoids the need to repeatedly initialise
David Chinner07c8f672008-10-30 16:11:59 +1100843 * fields in the xfs inode that left in the initialise state
844 * when freeing the inode.
845 */
David Chinnerbf904242008-10-30 17:36:14 +1100846STATIC void
847xfs_fs_inode_init_once(
David Chinner07c8f672008-10-30 16:11:59 +1100848 void *inode)
849{
850 struct xfs_inode *ip = inode;
851
852 memset(ip, 0, sizeof(struct xfs_inode));
David Chinnerbf904242008-10-30 17:36:14 +1100853
854 /* vfs inode */
855 inode_init_once(VFS_I(ip));
856
857 /* xfs inode */
David Chinner07c8f672008-10-30 16:11:59 +1100858 atomic_set(&ip->i_pincount, 0);
859 spin_lock_init(&ip->i_flags_lock);
David Chinner07c8f672008-10-30 16:11:59 +1100860
861 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
862 "xfsino", ip->i_ino);
David Chinner07c8f672008-10-30 16:11:59 +1100863}
864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865/*
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000866 * This is called by the VFS when dirtying inode metadata. This can happen
867 * for a few reasons, but we only care about timestamp updates, given that
868 * we handled the rest ourselves. In theory no other calls should happen,
869 * but for example generic_write_end() keeps dirtying the inode after
870 * updating i_size. Thus we check that the flags are exactly I_DIRTY_SYNC,
871 * and skip this call otherwise.
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000872 *
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000873 * We'll hopefull get a different method just for updating timestamps soon,
874 * at which point this hack can go away, and maybe we'll also get real
875 * error handling here.
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000876 */
877STATIC void
878xfs_fs_dirty_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 struct inode *inode,
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000880 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881{
Dave Chinner2e656092008-11-28 14:23:33 +1100882 struct xfs_inode *ip = XFS_I(inode);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100883 struct xfs_mount *mp = ip->i_mount;
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000884 struct xfs_trans *tp;
885 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000887 if (flags != I_DIRTY_SYNC)
888 return;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100889
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000890 trace_xfs_dirty_inode(ip);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100891
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000892 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
893 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
894 if (error) {
895 xfs_trans_cancel(tp, 0);
896 goto trouble;
Christoph Hellwig07fec732010-02-09 11:43:49 +1100897 }
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000898 xfs_ilock(ip, XFS_ILOCK_EXCL);
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000899 /*
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000900 * Grab all the latest timestamps from the Linux inode.
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000901 */
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000902 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
903 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
904 ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
905 ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
906 ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
907 ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
908
909 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
Christoph Hellwig8f639dd2012-02-29 09:53:55 +0000910 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000911 error = xfs_trans_commit(tp, 0);
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000912 if (error)
Christoph Hellwig8a9c9982012-02-29 09:53:52 +0000913 goto trouble;
914 return;
915
916trouble:
917 xfs_warn(mp, "failed to update timestamps for inode 0x%llx", ip->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918}
919
920STATIC void
Al Virob57922d2010-06-07 14:34:48 -0400921xfs_fs_evict_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 struct inode *inode)
923{
Christoph Hellwig1543d792007-08-29 11:46:47 +1000924 xfs_inode_t *ip = XFS_I(inode);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000925
Al Virob57922d2010-06-07 14:34:48 -0400926 trace_xfs_evict_inode(ip);
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000927
Al Virob57922d2010-06-07 14:34:48 -0400928 truncate_inode_pages(&inode->i_data, 0);
929 end_writeback(inode);
David Chinner99fa8cb2008-10-30 17:36:40 +1100930 XFS_STATS_INC(vn_rele);
931 XFS_STATS_INC(vn_remove);
932 XFS_STATS_DEC(vn_active);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000933
Christoph Hellwig033da482009-10-19 04:05:26 +0000934 /*
935 * The iolock is used by the file system to coordinate reads,
936 * writes, and block truncates. Up to this point the lock
937 * protected concurrent accesses by users of the inode. But
938 * from here forward we're doing some final processing of the
939 * inode because we're done with it, and although we reuse the
940 * iolock for protection it is really a distinct lock class
941 * (in the lockdep sense) from before. To keep lockdep happy
942 * (and basically indicate what we are doing), we explicitly
943 * re-init the iolock here.
944 */
945 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
946 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
Dave Chinnerdcfcf202010-12-23 11:57:13 +1100947 lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
948 &xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
Christoph Hellwig033da482009-10-19 04:05:26 +0000949
David Chinner99fa8cb2008-10-30 17:36:40 +1100950 xfs_inactive(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951}
952
Dave Chinner5132ba82012-03-22 05:15:10 +0000953/*
954 * We do an unlocked check for XFS_IDONTCACHE here because we are already
955 * serialised against cache hits here via the inode->i_lock and igrab() in
956 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
957 * racing with us, and it avoids needing to grab a spinlock here for every inode
958 * we drop the final reference on.
959 */
960STATIC int
961xfs_fs_drop_inode(
962 struct inode *inode)
963{
964 struct xfs_inode *ip = XFS_I(inode);
965
966 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
967}
968
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969STATIC void
Christoph Hellwiga7381592008-08-13 16:04:05 +1000970xfs_free_fsname(
971 struct xfs_mount *mp)
972{
973 kfree(mp->m_fsname);
974 kfree(mp->m_rtname);
975 kfree(mp->m_logname);
976}
977
978STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100979xfs_fs_put_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 struct super_block *sb)
981{
Christoph Hellwig745f6912007-08-30 17:20:39 +1000982 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
David Chinnera167b172008-10-30 17:06:18 +1100984 xfs_syncd_stop(mp);
Christoph Hellwig075fe102009-06-08 15:35:48 +0200985
Christoph Hellwige48ad312008-05-20 11:30:52 +1000986 /*
987 * Blow away any referenced inode in the filestreams cache.
988 * This can and will cause log traffic as inodes go inactive
989 * here.
990 */
991 xfs_filestream_unmount(mp);
992
Christoph Hellwiga9add832011-10-10 16:52:52 +0000993 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad312008-05-20 11:30:52 +1000994
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000995 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +1000996 xfs_freesb(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +1000997 xfs_icsb_destroy_counters(mp);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000998 xfs_destroy_mount_workqueues(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000999 xfs_close_devices(mp);
Christoph Hellwiga7381592008-08-13 16:04:05 +10001000 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001001 kfree(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002}
1003
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004STATIC int
Christoph Hellwig69961a22009-10-06 20:29:28 +00001005xfs_fs_sync_fs(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 struct super_block *sb,
1007 int wait)
1008{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001009 struct xfs_mount *mp = XFS_M(sb);
Nathan Scottb83bd132006-06-09 16:48:30 +10001010 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001012 /*
Christoph Hellwig34625c62011-12-06 21:58:12 +00001013 * Doing anything during the async pass would be counterproductive.
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001014 */
Christoph Hellwig34625c62011-12-06 21:58:12 +00001015 if (!wait)
Christoph Hellwig69961a22009-10-06 20:29:28 +00001016 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
Christoph Hellwig69961a22009-10-06 20:29:28 +00001018 error = xfs_quiesce_data(mp);
1019 if (error)
1020 return -error;
1021
1022 if (laptop_mode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 /*
1024 * The disk must be active because we're syncing.
1025 * We schedule xfssyncd now (now that the disk is
1026 * active) instead of later (when it might not be).
1027 */
Dave Chinnerc6d09b62011-04-08 12:45:07 +10001028 flush_delayed_work_sync(&mp->m_sync_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 }
1030
Christoph Hellwig69961a22009-10-06 20:29:28 +00001031 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032}
1033
1034STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001035xfs_fs_statfs(
David Howells726c3342006-06-23 02:02:58 -07001036 struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 struct kstatfs *statp)
1038{
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001039 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1040 xfs_sb_t *sbp = &mp->m_sb;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001041 struct xfs_inode *ip = XFS_I(dentry->d_inode);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001042 __uint64_t fakeinos, id;
1043 xfs_extlen_t lsize;
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001044 __int64_t ffree;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001045
1046 statp->f_type = XFS_SB_MAGIC;
1047 statp->f_namelen = MAXNAMELEN - 1;
1048
1049 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1050 statp->f_fsid.val[0] = (u32)id;
1051 statp->f_fsid.val[1] = (u32)(id >> 32);
1052
Christoph Hellwigd4d90b52008-04-22 17:34:37 +10001053 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001054
1055 spin_lock(&mp->m_sb_lock);
1056 statp->f_bsize = sbp->sb_blocksize;
1057 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1058 statp->f_blocks = sbp->sb_dblocks - lsize;
1059 statp->f_bfree = statp->f_bavail =
1060 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1061 fakeinos = statp->f_bfree << sbp->sb_inopblog;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001062 statp->f_files =
1063 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1064 if (mp->m_maxicount)
Christoph Hellwiga19d9f82009-03-29 09:51:08 +02001065 statp->f_files = min_t(typeof(statp->f_files),
1066 statp->f_files,
1067 mp->m_maxicount);
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001068
1069 /* make sure statp->f_ffree does not underflow */
1070 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1071 statp->f_ffree = max_t(__int64_t, ffree, 0);
1072
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001073 spin_unlock(&mp->m_sb_lock);
1074
Christoph Hellwig7d095252009-06-08 15:33:32 +02001075 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1076 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1077 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1078 xfs_qm_statvfs(ip, statp);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001079 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080}
1081
Eric Sandeend5db0f92010-02-05 22:59:53 +00001082STATIC void
1083xfs_save_resvblks(struct xfs_mount *mp)
1084{
1085 __uint64_t resblks = 0;
1086
1087 mp->m_resblks_save = mp->m_resblks;
1088 xfs_reserve_blocks(mp, &resblks, NULL);
1089}
1090
1091STATIC void
1092xfs_restore_resvblks(struct xfs_mount *mp)
1093{
1094 __uint64_t resblks;
1095
1096 if (mp->m_resblks_save) {
1097 resblks = mp->m_resblks_save;
1098 mp->m_resblks_save = 0;
1099 } else
1100 resblks = xfs_default_resblks(mp);
1101
1102 xfs_reserve_blocks(mp, &resblks, NULL);
1103}
1104
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001106xfs_fs_remount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 struct super_block *sb,
1108 int *flags,
1109 char *options)
1110{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001111 struct xfs_mount *mp = XFS_M(sb);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001112 substring_t args[MAX_OPT_ARGS];
1113 char *p;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001114 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001116 while ((p = strsep(&options, ",")) != NULL) {
1117 int token;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001118
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001119 if (!*p)
1120 continue;
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001121
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001122 token = match_token(p, tokens, args);
1123 switch (token) {
1124 case Opt_barrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001125 mp->m_flags |= XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001126 break;
1127 case Opt_nobarrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001128 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001129 break;
1130 default:
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001131 /*
1132 * Logically we would return an error here to prevent
1133 * users from believing they might have changed
1134 * mount options using remount which can't be changed.
1135 *
1136 * But unfortunately mount(8) adds all options from
1137 * mtab and fstab to the mount arguments in some cases
1138 * so we can't blindly reject options, but have to
1139 * check for each specified option if it actually
1140 * differs from the currently set option and only
1141 * reject it if that's the case.
1142 *
1143 * Until that is implemented we return success for
1144 * every remount request, and silently ignore all
1145 * options that we can't actually change.
1146 */
1147#if 0
Dave Chinner4f107002011-03-07 10:00:35 +11001148 xfs_info(mp,
1149 "mount option \"%s\" not supported for remount\n", p);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001150 return -EINVAL;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001151#else
Christoph Hellwig6c5e51d2008-10-12 14:30:44 +02001152 break;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001153#endif
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001154 }
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001155 }
1156
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001157 /* ro -> rw */
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001158 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1159 mp->m_flags &= ~XFS_MOUNT_RDONLY;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001160
1161 /*
1162 * If this is the first remount to writeable state we
1163 * might have some superblock changes to update.
1164 */
1165 if (mp->m_update_flags) {
1166 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1167 if (error) {
Dave Chinner4f107002011-03-07 10:00:35 +11001168 xfs_warn(mp, "failed to write sb changes");
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001169 return error;
1170 }
1171 mp->m_update_flags = 0;
1172 }
Dave Chinnercbe132a2010-01-26 15:08:49 +11001173
1174 /*
1175 * Fill out the reserve pool if it is empty. Use the stashed
1176 * value if it is non-zero, otherwise go with the default.
1177 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001178 xfs_restore_resvblks(mp);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001179 }
1180
1181 /* rw -> ro */
1182 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
Dave Chinnercbe132a2010-01-26 15:08:49 +11001183 /*
1184 * After we have synced the data but before we sync the
1185 * metadata, we need to free up the reserve block pool so that
1186 * the used block count in the superblock on disk is correct at
1187 * the end of the remount. Stash the current reserve pool size
1188 * so that if we get remounted rw, we can return it to the same
1189 * size.
1190 */
Dave Chinnercbe132a2010-01-26 15:08:49 +11001191
David Chinnere9f1c6e2008-10-30 17:15:50 +11001192 xfs_quiesce_data(mp);
Eric Sandeend5db0f92010-02-05 22:59:53 +00001193 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001194 xfs_quiesce_attr(mp);
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001195 mp->m_flags |= XFS_MOUNT_RDONLY;
1196 }
1197
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001198 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199}
1200
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001201/*
1202 * Second stage of a freeze. The data is already frozen so we only
David Chinner76bf1052008-10-30 17:16:21 +11001203 * need to take care of the metadata. Once that's done write a dummy
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001204 * record to dirty the log in case of a crash while frozen.
1205 */
Takashi Satoc4be0c12009-01-09 16:40:58 -08001206STATIC int
1207xfs_fs_freeze(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 struct super_block *sb)
1209{
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001210 struct xfs_mount *mp = XFS_M(sb);
1211
Eric Sandeend5db0f92010-02-05 22:59:53 +00001212 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001213 xfs_quiesce_attr(mp);
Dave Chinnerc58efdb2011-01-04 04:49:29 +00001214 return -xfs_fs_log_dummy(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215}
1216
1217STATIC int
Eric Sandeend5db0f92010-02-05 22:59:53 +00001218xfs_fs_unfreeze(
1219 struct super_block *sb)
1220{
1221 struct xfs_mount *mp = XFS_M(sb);
1222
1223 xfs_restore_resvblks(mp);
1224 return 0;
1225}
1226
1227STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001228xfs_fs_show_options(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 struct seq_file *m,
Al Viro34c80b12011-12-08 21:32:45 -05001230 struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231{
Al Viro34c80b12011-12-08 21:32:45 -05001232 return -xfs_showargs(XFS_M(root->d_sb), m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233}
1234
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001235/*
1236 * This function fills in xfs_mount_t fields based on mount args.
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001237 * Note: the superblock _has_ now been read in.
1238 */
1239STATIC int
1240xfs_finish_flags(
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001241 struct xfs_mount *mp)
1242{
1243 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1244
Frederik Schwarzer025dfda2008-10-16 19:02:37 +02001245 /* Fail a mount where the logbuf is smaller than the log stripe */
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001246 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001247 if (mp->m_logbsize <= 0 &&
1248 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001249 mp->m_logbsize = mp->m_sb.sb_logsunit;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001250 } else if (mp->m_logbsize > 0 &&
1251 mp->m_logbsize < mp->m_sb.sb_logsunit) {
Dave Chinner4f107002011-03-07 10:00:35 +11001252 xfs_warn(mp,
1253 "logbuf size must be greater than or equal to log stripe size");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001254 return XFS_ERROR(EINVAL);
1255 }
1256 } else {
1257 /* Fail a mount if the logbuf is larger than 32K */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001258 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
Dave Chinner4f107002011-03-07 10:00:35 +11001259 xfs_warn(mp,
1260 "logbuf size for version 1 logs must be 16K or 32K");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001261 return XFS_ERROR(EINVAL);
1262 }
1263 }
1264
1265 /*
1266 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1267 * told by noattr2 to turn it off
1268 */
1269 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001270 !(mp->m_flags & XFS_MOUNT_NOATTR2))
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001271 mp->m_flags |= XFS_MOUNT_ATTR2;
1272
1273 /*
1274 * prohibit r/w mounts of read-only filesystems
1275 */
1276 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
Dave Chinner4f107002011-03-07 10:00:35 +11001277 xfs_warn(mp,
1278 "cannot mount a read-only filesystem as read-write");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001279 return XFS_ERROR(EROFS);
1280 }
1281
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001282 return 0;
1283}
1284
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001286xfs_fs_fill_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 struct super_block *sb,
1288 void *data,
1289 int silent)
1290{
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001291 struct inode *root;
Christoph Hellwig745f6912007-08-30 17:20:39 +10001292 struct xfs_mount *mp = NULL;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001293 int flags = 0, error = ENOMEM;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001294
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001295 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1296 if (!mp)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001297 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001299 spin_lock_init(&mp->m_sb_lock);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001300 mutex_init(&mp->m_growlock);
1301 atomic_set(&mp->m_active_trans, 0);
Christoph Hellwig74394492007-08-30 17:21:22 +10001302
Christoph Hellwigb267ce92007-08-30 17:21:30 +10001303 mp->m_super = sb;
1304 sb->s_fs_info = mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305
Christoph Hellwig288699f2010-06-23 18:11:15 +10001306 error = xfs_parseargs(mp, (char *)data);
Christoph Hellwig745f6912007-08-30 17:20:39 +10001307 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001308 goto out_free_fsname;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
1310 sb_min_blocksize(sb, BBSIZE);
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001311 sb->s_xattr = xfs_xattr_handlers;
Nathan Scotta50cd262006-03-14 14:06:18 +11001312 sb->s_export_op = &xfs_export_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001313#ifdef CONFIG_XFS_QUOTA
Nathan Scotta50cd262006-03-14 14:06:18 +11001314 sb->s_qcop = &xfs_quotactl_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001315#endif
Nathan Scotta50cd262006-03-14 14:06:18 +11001316 sb->s_op = &xfs_super_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001318 if (silent)
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001319 flags |= XFS_MFSI_QUIET;
1320
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001321 error = xfs_open_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001322 if (error)
Christoph Hellwig288699f2010-06-23 18:11:15 +10001323 goto out_free_fsname;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001324
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001325 error = xfs_init_mount_workqueues(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001326 if (error)
1327 goto out_close_devices;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001328
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001329 error = xfs_icsb_init_counters(mp);
1330 if (error)
1331 goto out_destroy_workqueues;
1332
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001333 error = xfs_readsb(mp, flags);
1334 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001335 goto out_destroy_counters;
1336
1337 error = xfs_finish_flags(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001338 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001339 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001340
Christoph Hellwige34b5622008-05-20 15:10:36 +10001341 error = xfs_setup_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001342 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001343 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001344
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001345 error = xfs_filestream_mount(mp);
1346 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001347 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001348
Dave Chinner704b2902011-03-26 09:14:57 +11001349 /*
1350 * we must configure the block size in the superblock before we run the
1351 * full mount process as the mount process can lookup and cache inodes.
1352 * For the same reason we must also initialise the syncd and register
1353 * the inode cache shrinker so that inodes can be reclaimed during
1354 * operations like a quotacheck that iterate all inodes in the
1355 * filesystem.
1356 */
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001357 sb->s_magic = XFS_SB_MAGIC;
1358 sb->s_blocksize = mp->m_sb.sb_blocksize;
1359 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
Al Viro8de52772012-02-06 12:45:27 -05001361 sb->s_max_links = XFS_MAXLINK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 sb->s_time_gran = 1;
1363 set_posix_acl_flag(sb);
1364
Dave Chinner704b2902011-03-26 09:14:57 +11001365 error = xfs_mountfs(mp);
1366 if (error)
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001367 goto out_filestream_unmount;
1368
1369 error = xfs_syncd_init(mp);
1370 if (error)
1371 goto out_unmount;
Dave Chinner704b2902011-03-26 09:14:57 +11001372
David Chinner01651642008-08-13 15:45:15 +10001373 root = igrab(VFS_I(mp->m_rootip));
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001374 if (!root) {
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001375 error = ENOENT;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001376 goto out_syncd_stop;
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001377 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001378 if (is_bad_inode(root)) {
1379 error = EINVAL;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001380 goto out_syncd_stop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 }
Al Viro48fde702012-01-08 22:15:13 -05001382 sb->s_root = d_make_root(root);
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001383 if (!sb->s_root) {
1384 error = ENOMEM;
Al Viro48fde702012-01-08 22:15:13 -05001385 goto out_syncd_stop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 }
Christoph Hellwig74394492007-08-30 17:21:22 +10001387
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 return 0;
1389
Christoph Hellwig120226c2008-05-20 15:11:11 +10001390 out_filestream_unmount:
1391 xfs_filestream_unmount(mp);
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001392 out_free_sb:
1393 xfs_freesb(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001394 out_destroy_counters:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001395 xfs_icsb_destroy_counters(mp);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001396out_destroy_workqueues:
1397 xfs_destroy_mount_workqueues(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001398 out_close_devices:
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001399 xfs_close_devices(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001400 out_free_fsname:
1401 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001402 kfree(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001403 out:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001404 return -error;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001405
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001406 out_syncd_stop:
Dave Chinner704b2902011-03-26 09:14:57 +11001407 xfs_syncd_stop(mp);
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001408 out_unmount:
Christoph Hellwige48ad312008-05-20 11:30:52 +10001409 /*
1410 * Blow away any referenced inode in the filestreams cache.
1411 * This can and will cause log traffic as inodes go inactive
1412 * here.
1413 */
1414 xfs_filestream_unmount(mp);
1415
Christoph Hellwiga9add832011-10-10 16:52:52 +00001416 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad312008-05-20 11:30:52 +10001417
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001418 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001419 goto out_free_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
Al Viro152a0832010-07-25 00:46:55 +04001422STATIC struct dentry *
1423xfs_fs_mount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 struct file_system_type *fs_type,
1425 int flags,
1426 const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04001427 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428{
Al Viro152a0832010-07-25 00:46:55 +04001429 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430}
1431
Dave Chinner8daaa832011-07-08 14:14:46 +10001432static int
1433xfs_fs_nr_cached_objects(
1434 struct super_block *sb)
1435{
1436 return xfs_reclaim_inodes_count(XFS_M(sb));
1437}
1438
1439static void
1440xfs_fs_free_cached_objects(
1441 struct super_block *sb,
1442 int nr_to_scan)
1443{
1444 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1445}
1446
Alexey Dobriyanb87221d2009-09-21 17:01:09 -07001447static const struct super_operations xfs_super_operations = {
Nathan Scotta50cd262006-03-14 14:06:18 +11001448 .alloc_inode = xfs_fs_alloc_inode,
1449 .destroy_inode = xfs_fs_destroy_inode,
Christoph Hellwigf9581b12009-10-06 20:29:26 +00001450 .dirty_inode = xfs_fs_dirty_inode,
Al Virob57922d2010-06-07 14:34:48 -04001451 .evict_inode = xfs_fs_evict_inode,
Dave Chinner5132ba82012-03-22 05:15:10 +00001452 .drop_inode = xfs_fs_drop_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001453 .put_super = xfs_fs_put_super,
Christoph Hellwig69961a22009-10-06 20:29:28 +00001454 .sync_fs = xfs_fs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -08001455 .freeze_fs = xfs_fs_freeze,
Eric Sandeend5db0f92010-02-05 22:59:53 +00001456 .unfreeze_fs = xfs_fs_unfreeze,
Nathan Scotta50cd262006-03-14 14:06:18 +11001457 .statfs = xfs_fs_statfs,
1458 .remount_fs = xfs_fs_remount,
1459 .show_options = xfs_fs_show_options,
Dave Chinner8daaa832011-07-08 14:14:46 +10001460 .nr_cached_objects = xfs_fs_nr_cached_objects,
1461 .free_cached_objects = xfs_fs_free_cached_objects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462};
1463
Andrew Morton5085b602007-02-20 13:57:47 -08001464static struct file_system_type xfs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465 .owner = THIS_MODULE,
1466 .name = "xfs",
Al Viro152a0832010-07-25 00:46:55 +04001467 .mount = xfs_fs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 .kill_sb = kill_block_super,
1469 .fs_flags = FS_REQUIRES_DEV,
1470};
1471
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001472STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001473xfs_init_zones(void)
1474{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001475
1476 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1477 if (!xfs_ioend_zone)
David Chinnerbf904242008-10-30 17:36:14 +11001478 goto out;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001479
1480 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1481 xfs_ioend_zone);
1482 if (!xfs_ioend_pool)
1483 goto out_destroy_ioend_zone;
1484
1485 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1486 "xfs_log_ticket");
1487 if (!xfs_log_ticket_zone)
1488 goto out_destroy_ioend_pool;
1489
1490 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1491 "xfs_bmap_free_item");
1492 if (!xfs_bmap_free_item_zone)
1493 goto out_destroy_log_ticket_zone;
David Chinnerbf904242008-10-30 17:36:14 +11001494
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001495 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1496 "xfs_btree_cur");
1497 if (!xfs_btree_cur_zone)
1498 goto out_destroy_bmap_free_item_zone;
1499
1500 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1501 "xfs_da_state");
1502 if (!xfs_da_state_zone)
1503 goto out_destroy_btree_cur_zone;
1504
1505 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1506 if (!xfs_dabuf_zone)
1507 goto out_destroy_da_state_zone;
1508
1509 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1510 if (!xfs_ifork_zone)
1511 goto out_destroy_dabuf_zone;
1512
1513 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1514 if (!xfs_trans_zone)
1515 goto out_destroy_ifork_zone;
1516
Christoph Hellwige98c4142010-06-23 18:11:15 +10001517 xfs_log_item_desc_zone =
1518 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1519 "xfs_log_item_desc");
1520 if (!xfs_log_item_desc_zone)
1521 goto out_destroy_trans_zone;
1522
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001523 /*
1524 * The size of the zone allocated buf log item is the maximum
1525 * size possible under XFS. This wastes a little bit of memory,
1526 * but it is much faster.
1527 */
1528 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
Dave Chinnerc1155412010-05-07 11:05:19 +10001529 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001530 NBWORD) * sizeof(int))), "xfs_buf_item");
1531 if (!xfs_buf_item_zone)
Christoph Hellwige98c4142010-06-23 18:11:15 +10001532 goto out_destroy_log_item_desc_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001533
1534 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1535 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1536 sizeof(xfs_extent_t))), "xfs_efd_item");
1537 if (!xfs_efd_zone)
1538 goto out_destroy_buf_item_zone;
1539
1540 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1541 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1542 sizeof(xfs_extent_t))), "xfs_efi_item");
1543 if (!xfs_efi_zone)
1544 goto out_destroy_efd_zone;
1545
1546 xfs_inode_zone =
1547 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
David Chinnerbf904242008-10-30 17:36:14 +11001548 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1549 xfs_fs_inode_init_once);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001550 if (!xfs_inode_zone)
1551 goto out_destroy_efi_zone;
1552
1553 xfs_ili_zone =
1554 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1555 KM_ZONE_SPREAD, NULL);
1556 if (!xfs_ili_zone)
1557 goto out_destroy_inode_zone;
1558
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001559 return 0;
1560
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001561 out_destroy_inode_zone:
1562 kmem_zone_destroy(xfs_inode_zone);
1563 out_destroy_efi_zone:
1564 kmem_zone_destroy(xfs_efi_zone);
1565 out_destroy_efd_zone:
1566 kmem_zone_destroy(xfs_efd_zone);
1567 out_destroy_buf_item_zone:
1568 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001569 out_destroy_log_item_desc_zone:
1570 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001571 out_destroy_trans_zone:
1572 kmem_zone_destroy(xfs_trans_zone);
1573 out_destroy_ifork_zone:
1574 kmem_zone_destroy(xfs_ifork_zone);
1575 out_destroy_dabuf_zone:
1576 kmem_zone_destroy(xfs_dabuf_zone);
1577 out_destroy_da_state_zone:
1578 kmem_zone_destroy(xfs_da_state_zone);
1579 out_destroy_btree_cur_zone:
1580 kmem_zone_destroy(xfs_btree_cur_zone);
1581 out_destroy_bmap_free_item_zone:
1582 kmem_zone_destroy(xfs_bmap_free_item_zone);
1583 out_destroy_log_ticket_zone:
1584 kmem_zone_destroy(xfs_log_ticket_zone);
1585 out_destroy_ioend_pool:
1586 mempool_destroy(xfs_ioend_pool);
1587 out_destroy_ioend_zone:
1588 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001589 out:
1590 return -ENOMEM;
1591}
1592
1593STATIC void
1594xfs_destroy_zones(void)
1595{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001596 kmem_zone_destroy(xfs_ili_zone);
1597 kmem_zone_destroy(xfs_inode_zone);
1598 kmem_zone_destroy(xfs_efi_zone);
1599 kmem_zone_destroy(xfs_efd_zone);
1600 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001601 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001602 kmem_zone_destroy(xfs_trans_zone);
1603 kmem_zone_destroy(xfs_ifork_zone);
1604 kmem_zone_destroy(xfs_dabuf_zone);
1605 kmem_zone_destroy(xfs_da_state_zone);
1606 kmem_zone_destroy(xfs_btree_cur_zone);
1607 kmem_zone_destroy(xfs_bmap_free_item_zone);
1608 kmem_zone_destroy(xfs_log_ticket_zone);
1609 mempool_destroy(xfs_ioend_pool);
1610 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001611
1612}
1613
1614STATIC int __init
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001615xfs_init_workqueues(void)
1616{
1617 /*
Christoph Hellwig40d344e2011-12-05 08:53:21 +00001618 * We never want to the same work item to run twice, reclaiming inodes
1619 * or idling the log is not going to get any faster by multiple CPUs
1620 * competing for ressources. Use the default large max_active value
1621 * so that even lots of filesystems can perform these task in parallel.
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001622 */
Christoph Hellwig40d344e2011-12-05 08:53:21 +00001623 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0);
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001624 if (!xfs_syncd_wq)
Christoph Hellwig00308072011-10-11 11:14:10 -04001625 return -ENOMEM;
Dave Chinnerc999a222012-03-22 05:15:07 +00001626
1627 /*
1628 * The allocation workqueue can be used in memory reclaim situations
1629 * (writepage path), and parallelism is only limited by the number of
1630 * AGs in all the filesystems mounted. Hence use the default large
1631 * max_active value for this workqueue.
1632 */
1633 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
1634 if (!xfs_alloc_wq)
1635 goto out_destroy_syncd;
1636
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001637 return 0;
Dave Chinnerc999a222012-03-22 05:15:07 +00001638
1639out_destroy_syncd:
1640 destroy_workqueue(xfs_syncd_wq);
1641 return -ENOMEM;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001642}
1643
Luck, Tony39411f82011-04-11 12:06:12 -07001644STATIC void
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001645xfs_destroy_workqueues(void)
1646{
Dave Chinnerc999a222012-03-22 05:15:07 +00001647 destroy_workqueue(xfs_alloc_wq);
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001648 destroy_workqueue(xfs_syncd_wq);
1649}
1650
1651STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001652init_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653{
1654 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655
Christoph Hellwig65795912008-11-28 14:23:33 +11001656 printk(KERN_INFO XFS_VERSION_STRING " with "
1657 XFS_BUILD_OPTIONS " enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001659 xfs_dir_startup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Nathan Scott87582802006-03-14 13:18:19 +11001661 error = xfs_init_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001662 if (error)
1663 goto out;
1664
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001665 error = xfs_init_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001666 if (error)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001667 goto out_destroy_zones;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001668
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001669 error = xfs_mru_cache_init();
1670 if (error)
1671 goto out_destroy_wq;
1672
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001673 error = xfs_filestream_init();
1674 if (error)
1675 goto out_mru_cache_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
Nathan Scottce8e9222006-01-11 15:39:08 +11001677 error = xfs_buf_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001678 if (error)
1679 goto out_filestream_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001681 error = xfs_init_procfs();
1682 if (error)
1683 goto out_buf_terminate;
1684
1685 error = xfs_sysctl_register();
1686 if (error)
1687 goto out_cleanup_procfs;
1688
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001689 error = xfs_qm_init();
1690 if (error)
1691 goto out_sysctl_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692
1693 error = register_filesystem(&xfs_fs_type);
1694 if (error)
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001695 goto out_qm_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 return 0;
1697
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001698 out_qm_exit:
1699 xfs_qm_exit();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001700 out_sysctl_unregister:
1701 xfs_sysctl_unregister();
1702 out_cleanup_procfs:
1703 xfs_cleanup_procfs();
1704 out_buf_terminate:
Nathan Scottce8e9222006-01-11 15:39:08 +11001705 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001706 out_filestream_uninit:
1707 xfs_filestream_uninit();
1708 out_mru_cache_uninit:
1709 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001710 out_destroy_wq:
1711 xfs_destroy_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001712 out_destroy_zones:
Nathan Scott87582802006-03-14 13:18:19 +11001713 xfs_destroy_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001714 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 return error;
1716}
1717
1718STATIC void __exit
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001719exit_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720{
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001721 xfs_qm_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 unregister_filesystem(&xfs_fs_type);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001723 xfs_sysctl_unregister();
1724 xfs_cleanup_procfs();
Nathan Scottce8e9222006-01-11 15:39:08 +11001725 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001726 xfs_filestream_uninit();
1727 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001728 xfs_destroy_workqueues();
Nathan Scott87582802006-03-14 13:18:19 +11001729 xfs_destroy_zones();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730}
1731
1732module_init(init_xfs_fs);
1733module_exit(exit_xfs_fs);
1734
1735MODULE_AUTHOR("Silicon Graphics, Inc.");
1736MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1737MODULE_LICENSE("GPL");