blob: 7b7669507ee38f5e64db218bad4769635286325e [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;
Christoph Hellwig20ad9ea2011-02-13 12:06:34 +0000202 mp->m_flags |= XFS_MOUNT_DELAYLOG;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100203
204 /*
205 * These can be overridden by the mount option parsing.
206 */
207 mp->m_logbufs = -1;
208 mp->m_logbsize = -1;
David Chinnera67d7c52007-11-23 16:29:32 +1100209
210 if (!options)
211 goto done;
212
David Chinnera67d7c52007-11-23 16:29:32 +1100213 while ((this_char = strsep(&options, ",")) != NULL) {
214 if (!*this_char)
215 continue;
216 if ((value = strchr(this_char, '=')) != NULL)
217 *value++ = 0;
218
219 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
220 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100221 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100222 this_char);
223 return EINVAL;
224 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100225 mp->m_logbufs = simple_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100226 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
227 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100228 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100229 this_char);
230 return EINVAL;
231 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100232 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
David Chinnera67d7c52007-11-23 16:29:32 +1100233 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
234 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100235 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100236 this_char);
237 return EINVAL;
238 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100239 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
240 if (!mp->m_logname)
241 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100242 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100243 xfs_warn(mp, "%s option not allowed on this system",
Christoph Hellwig288699f2010-06-23 18:11:15 +1000244 this_char);
245 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100246 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
247 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100248 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100249 this_char);
250 return EINVAL;
251 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100252 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
253 if (!mp->m_rtname)
254 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100255 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
256 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100257 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100258 this_char);
259 return EINVAL;
260 }
261 iosize = simple_strtoul(value, &eov, 10);
Christoph Hellwig1ec79442008-10-30 17:55:08 +1100262 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100263 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
264 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100265 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100266 this_char);
267 return EINVAL;
268 }
269 iosize = suffix_strtoul(value, &eov, 10);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100270 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100271 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
272 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
273 mp->m_flags |= XFS_MOUNT_GRPID;
274 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
275 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
276 mp->m_flags &= ~XFS_MOUNT_GRPID;
277 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100278 mp->m_flags |= XFS_MOUNT_WSYNC;
David Chinnera67d7c52007-11-23 16:29:32 +1100279 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100280 mp->m_flags |= XFS_MOUNT_NORECOVERY;
David Chinnera67d7c52007-11-23 16:29:32 +1100281 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100282 mp->m_flags |= XFS_MOUNT_NOALIGN;
David Chinnera67d7c52007-11-23 16:29:32 +1100283 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100284 mp->m_flags |= XFS_MOUNT_SWALLOC;
David Chinnera67d7c52007-11-23 16:29:32 +1100285 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
286 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100287 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100288 this_char);
289 return EINVAL;
290 }
291 dsunit = simple_strtoul(value, &eov, 10);
292 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
293 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100294 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100295 this_char);
296 return EINVAL;
297 }
298 dswidth = simple_strtoul(value, &eov, 10);
299 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100300 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100301#if !XFS_BIG_INUMS
Dave Chinner4f107002011-03-07 10:00:35 +1100302 xfs_warn(mp, "%s option not allowed on this system",
David Chinnera67d7c52007-11-23 16:29:32 +1100303 this_char);
304 return EINVAL;
305#endif
306 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100307 mp->m_flags |= XFS_MOUNT_NOUUID;
David Chinnera67d7c52007-11-23 16:29:32 +1100308 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100309 mp->m_flags |= XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100310 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100311 mp->m_flags &= ~XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100312 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100313 mp->m_flags |= XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100314 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100315 mp->m_flags &= ~XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100316 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100317 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100318 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100319 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100320 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100321 mp->m_flags |= XFS_MOUNT_ATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100322 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100323 mp->m_flags &= ~XFS_MOUNT_ATTR2;
324 mp->m_flags |= XFS_MOUNT_NOATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100325 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100326 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100327 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100328 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
329 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
Christoph Hellwig469fc232008-10-30 17:54:57 +1100330 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100331 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100332 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
333 !strcmp(this_char, MNTOPT_UQUOTA) ||
334 !strcmp(this_char, MNTOPT_USRQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100335 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
336 XFS_UQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100337 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
338 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100339 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
340 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100341 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
342 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100343 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
344 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100345 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100346 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
347 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100348 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
349 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100350 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
351 XFS_OQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100352 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100353 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
354 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
Dave Chinner71e330b2010-05-21 14:37:18 +1000355 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
356 mp->m_flags |= XFS_MOUNT_DELAYLOG;
Dave Chinner71e330b2010-05-21 14:37:18 +1000357 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
358 mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
Christoph Hellwig242d6212011-08-24 05:57:51 +0000359 xfs_warn(mp,
360 "nodelaylog is deprecated and will be removed in Linux 3.3");
Christoph Hellwige84661a2011-05-20 13:45:32 +0000361 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
362 mp->m_flags |= XFS_MOUNT_DISCARD;
363 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
364 mp->m_flags &= ~XFS_MOUNT_DISCARD;
David Chinnera67d7c52007-11-23 16:29:32 +1100365 } else if (!strcmp(this_char, "ihashsize")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100366 xfs_warn(mp,
367 "ihashsize no longer used, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100368 } else if (!strcmp(this_char, "osyncisdsync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100369 xfs_warn(mp,
370 "osyncisdsync has no effect, option is deprecated.");
Christoph Hellwiga64afb02010-07-20 17:50:52 +1000371 } else if (!strcmp(this_char, "osyncisosync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100372 xfs_warn(mp,
373 "osyncisosync has no effect, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100374 } else if (!strcmp(this_char, "irixsgid")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100375 xfs_warn(mp,
376 "irixsgid is now a sysctl(2) variable, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100377 } else {
Dave Chinner4f107002011-03-07 10:00:35 +1100378 xfs_warn(mp, "unknown mount option [%s].", this_char);
David Chinnera67d7c52007-11-23 16:29:32 +1100379 return EINVAL;
380 }
381 }
382
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100383 /*
384 * no recovery flag requires a read-only mount
385 */
386 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
387 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100388 xfs_warn(mp, "no-recovery mounts must be read-only.");
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100389 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100390 }
391
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100392 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100393 xfs_warn(mp,
394 "sunit and swidth options incompatible with the noalign option");
David Chinnera67d7c52007-11-23 16:29:32 +1100395 return EINVAL;
396 }
397
Christoph Hellwige84661a2011-05-20 13:45:32 +0000398 if ((mp->m_flags & XFS_MOUNT_DISCARD) &&
399 !(mp->m_flags & XFS_MOUNT_DELAYLOG)) {
400 xfs_warn(mp,
401 "the discard option is incompatible with the nodelaylog option");
402 return EINVAL;
403 }
404
Christoph Hellwig7d095252009-06-08 15:33:32 +0200405#ifndef CONFIG_XFS_QUOTA
406 if (XFS_IS_QUOTA_RUNNING(mp)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100407 xfs_warn(mp, "quota support not available in this kernel.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200408 return EINVAL;
409 }
410#endif
411
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100412 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
413 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100414 xfs_warn(mp, "cannot mount with both project and group quota");
David Chinnera67d7c52007-11-23 16:29:32 +1100415 return EINVAL;
416 }
417
David Chinnera67d7c52007-11-23 16:29:32 +1100418 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100419 xfs_warn(mp, "sunit and swidth must be specified together");
David Chinnera67d7c52007-11-23 16:29:32 +1100420 return EINVAL;
421 }
422
423 if (dsunit && (dswidth % dsunit != 0)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100424 xfs_warn(mp,
425 "stripe width (%d) must be a multiple of the stripe unit (%d)",
David Chinnera67d7c52007-11-23 16:29:32 +1100426 dswidth, dsunit);
427 return EINVAL;
428 }
429
David Chinnera67d7c52007-11-23 16:29:32 +1100430done:
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100431 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
432 /*
433 * At this point the superblock has not been read
434 * in, therefore we do not know the block size.
435 * Before the mount call ends we will convert
436 * these to FSBs.
437 */
438 if (dsunit) {
439 mp->m_dalign = dsunit;
440 mp->m_flags |= XFS_MOUNT_RETERR;
441 }
442
443 if (dswidth)
444 mp->m_swidth = dswidth;
445 }
446
447 if (mp->m_logbufs != -1 &&
448 mp->m_logbufs != 0 &&
449 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
450 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100451 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100452 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
453 return XFS_ERROR(EINVAL);
454 }
455 if (mp->m_logbsize != -1 &&
456 mp->m_logbsize != 0 &&
457 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
458 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
459 !is_power_of_2(mp->m_logbsize))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100460 xfs_warn(mp,
461 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100462 mp->m_logbsize);
463 return XFS_ERROR(EINVAL);
464 }
465
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100466 if (iosizelog) {
467 if (iosizelog > XFS_MAX_IO_LOG ||
468 iosizelog < XFS_MIN_IO_LOG) {
Dave Chinner4f107002011-03-07 10:00:35 +1100469 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100470 iosizelog, XFS_MIN_IO_LOG,
471 XFS_MAX_IO_LOG);
472 return XFS_ERROR(EINVAL);
473 }
474
475 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
476 mp->m_readio_log = iosizelog;
477 mp->m_writeio_log = iosizelog;
478 }
479
David Chinnera67d7c52007-11-23 16:29:32 +1100480 return 0;
481}
482
483struct proc_xfs_info {
484 int flag;
485 char *str;
486};
487
488STATIC int
489xfs_showargs(
490 struct xfs_mount *mp,
491 struct seq_file *m)
492{
493 static struct proc_xfs_info xfs_info_set[] = {
494 /* the few simple ones we can get from the mount struct */
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100495 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
David Chinnera67d7c52007-11-23 16:29:32 +1100496 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
David Chinnera67d7c52007-11-23 16:29:32 +1100497 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
498 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
499 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
500 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
David Chinnera67d7c52007-11-23 16:29:32 +1100501 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
502 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
David Chinnera67d7c52007-11-23 16:29:32 +1100503 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
Dave Chinner71e330b2010-05-21 14:37:18 +1000504 { XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
Christoph Hellwige84661a2011-05-20 13:45:32 +0000505 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
David Chinnera67d7c52007-11-23 16:29:32 +1100506 { 0, NULL }
507 };
508 static struct proc_xfs_info xfs_info_unset[] = {
509 /* the few simple ones we can get from the mount struct */
David Chinnera67d7c52007-11-23 16:29:32 +1100510 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
511 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
512 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
513 { 0, NULL }
514 };
515 struct proc_xfs_info *xfs_infop;
516
517 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
518 if (mp->m_flags & xfs_infop->flag)
519 seq_puts(m, xfs_infop->str);
520 }
521 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
522 if (!(mp->m_flags & xfs_infop->flag))
523 seq_puts(m, xfs_infop->str);
524 }
525
526 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
527 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
528 (int)(1 << mp->m_writeio_log) >> 10);
529
530 if (mp->m_logbufs > 0)
531 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
532 if (mp->m_logbsize > 0)
533 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
534
535 if (mp->m_logname)
536 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
537 if (mp->m_rtname)
538 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
539
540 if (mp->m_dalign > 0)
541 seq_printf(m, "," MNTOPT_SUNIT "=%d",
542 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
543 if (mp->m_swidth > 0)
544 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
545 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
546
547 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
548 seq_puts(m, "," MNTOPT_USRQUOTA);
549 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
550 seq_puts(m, "," MNTOPT_UQUOTANOENF);
551
Alex Elder988abe42009-09-02 17:02:24 -0500552 /* Either project or group quotas can be active, not both */
David Chinnera67d7c52007-11-23 16:29:32 +1100553
Alex Elder988abe42009-09-02 17:02:24 -0500554 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
555 if (mp->m_qflags & XFS_OQUOTA_ENFD)
556 seq_puts(m, "," MNTOPT_PRJQUOTA);
557 else
558 seq_puts(m, "," MNTOPT_PQUOTANOENF);
559 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
560 if (mp->m_qflags & XFS_OQUOTA_ENFD)
561 seq_puts(m, "," MNTOPT_GRPQUOTA);
562 else
563 seq_puts(m, "," MNTOPT_GQUOTANOENF);
564 }
David Chinnera67d7c52007-11-23 16:29:32 +1100565
566 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
567 seq_puts(m, "," MNTOPT_NOQUOTA);
568
569 return 0;
570}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571__uint64_t
572xfs_max_file_offset(
573 unsigned int blockshift)
574{
575 unsigned int pagefactor = 1;
576 unsigned int bitshift = BITS_PER_LONG - 1;
577
578 /* Figure out maximum filesize, on Linux this can depend on
579 * the filesystem blocksize (on 32 bit platforms).
Christoph Hellwigebdec242010-10-06 10:47:23 +0200580 * __block_write_begin does this in an [unsigned] long...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 * page->index << (PAGE_CACHE_SHIFT - bbits)
582 * So, for page sized blocks (4K on 32 bit platforms),
583 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
584 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
585 * but for smaller blocksizes it is less (bbits = log2 bsize).
586 * Note1: get_block_t takes a long (implicit cast from above)
587 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
588 * can optionally convert the [unsigned] long from above into
589 * an [unsigned] long long.
590 */
591
592#if BITS_PER_LONG == 32
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +0200593# if defined(CONFIG_LBDAF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 ASSERT(sizeof(sector_t) == 8);
595 pagefactor = PAGE_CACHE_SIZE;
596 bitshift = BITS_PER_LONG;
597# else
598 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
599# endif
600#endif
601
602 return (((__uint64_t)pagefactor) << bitshift) - 1;
603}
604
Hannes Eder3180e662009-03-04 19:34:10 +0100605STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606xfs_blkdev_get(
607 xfs_mount_t *mp,
608 const char *name,
609 struct block_device **bdevp)
610{
611 int error = 0;
612
Tejun Heod4d77622010-11-13 11:55:18 +0100613 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
614 mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (IS_ERR(*bdevp)) {
616 error = PTR_ERR(*bdevp);
Dave Chinner4f107002011-03-07 10:00:35 +1100617 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 }
619
620 return -error;
621}
622
Hannes Eder3180e662009-03-04 19:34:10 +0100623STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624xfs_blkdev_put(
625 struct block_device *bdev)
626{
627 if (bdev)
Tejun Heoe525fd82010-11-13 11:55:17 +0100628 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
630
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100631void
632xfs_blkdev_issue_flush(
633 xfs_buftarg_t *buftarg)
634{
Christoph Hellwigdd3932e2010-09-16 20:51:46 +0200635 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100636}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000638STATIC void
639xfs_close_devices(
640 struct xfs_mount *mp)
641{
642 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000643 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500644 xfs_free_buftarg(mp, mp->m_logdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000645 xfs_blkdev_put(logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000646 }
647 if (mp->m_rtdev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000648 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500649 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000650 xfs_blkdev_put(rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000651 }
Christoph Hellwigb7963132009-03-03 14:48:37 -0500652 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000653}
654
655/*
656 * The file system configurations are:
657 * (1) device (partition) with data and internal log
658 * (2) logical volume with data and log subvolumes.
659 * (3) logical volume with data, log, and realtime subvolumes.
660 *
661 * We only have to handle opening the log and realtime volumes here if
662 * they are present. The data subvolume has already been opened by
663 * get_sb_bdev() and is stored in sb->s_bdev.
664 */
665STATIC int
666xfs_open_devices(
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100667 struct xfs_mount *mp)
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000668{
669 struct block_device *ddev = mp->m_super->s_bdev;
670 struct block_device *logdev = NULL, *rtdev = NULL;
671 int error;
672
673 /*
674 * Open real time and log devices - order is important.
675 */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100676 if (mp->m_logname) {
677 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000678 if (error)
679 goto out;
680 }
681
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100682 if (mp->m_rtname) {
683 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000684 if (error)
685 goto out_close_logdev;
686
687 if (rtdev == ddev || rtdev == logdev) {
Dave Chinner4f107002011-03-07 10:00:35 +1100688 xfs_warn(mp,
689 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000690 error = EINVAL;
691 goto out_close_rtdev;
692 }
693 }
694
695 /*
696 * Setup xfs_mount buffer target pointers
697 */
698 error = ENOMEM;
Dave Chinnerebad8612010-09-22 10:47:20 +1000699 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000700 if (!mp->m_ddev_targp)
701 goto out_close_rtdev;
702
703 if (rtdev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000704 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
705 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000706 if (!mp->m_rtdev_targp)
707 goto out_free_ddev_targ;
708 }
709
710 if (logdev && logdev != ddev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000711 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
712 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000713 if (!mp->m_logdev_targp)
714 goto out_free_rtdev_targ;
715 } else {
716 mp->m_logdev_targp = mp->m_ddev_targp;
717 }
718
719 return 0;
720
721 out_free_rtdev_targ:
722 if (mp->m_rtdev_targp)
Christoph Hellwigb7963132009-03-03 14:48:37 -0500723 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000724 out_free_ddev_targ:
Christoph Hellwigb7963132009-03-03 14:48:37 -0500725 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000726 out_close_rtdev:
727 if (rtdev)
728 xfs_blkdev_put(rtdev);
729 out_close_logdev:
730 if (logdev && logdev != ddev)
731 xfs_blkdev_put(logdev);
732 out:
733 return error;
734}
735
Christoph Hellwige34b5622008-05-20 15:10:36 +1000736/*
737 * Setup xfs_mount buffer target pointers based on superblock
738 */
739STATIC int
740xfs_setup_devices(
741 struct xfs_mount *mp)
742{
743 int error;
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000744
Christoph Hellwige34b5622008-05-20 15:10:36 +1000745 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
746 mp->m_sb.sb_sectsize);
747 if (error)
748 return error;
749
750 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
751 unsigned int log_sector_size = BBSIZE;
752
753 if (xfs_sb_version_hassector(&mp->m_sb))
754 log_sector_size = mp->m_sb.sb_logsectsize;
755 error = xfs_setsize_buftarg(mp->m_logdev_targp,
756 mp->m_sb.sb_blocksize,
757 log_sector_size);
758 if (error)
759 return error;
760 }
761 if (mp->m_rtdev_targp) {
762 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
763 mp->m_sb.sb_blocksize,
764 mp->m_sb.sb_sectsize);
765 if (error)
766 return error;
767 }
768
769 return 0;
770}
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000771
David Chinnerbf904242008-10-30 17:36:14 +1100772/* Catch misguided souls that try to use this interface on XFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773STATIC struct inode *
Nathan Scotta50cd262006-03-14 14:06:18 +1100774xfs_fs_alloc_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 struct super_block *sb)
776{
David Chinnerbf904242008-10-30 17:36:14 +1100777 BUG();
Lachlan McIlroy493dca62008-10-30 17:36:52 +1100778 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779}
780
David Chinnerbf904242008-10-30 17:36:14 +1100781/*
David Chinner99fa8cb2008-10-30 17:36:40 +1100782 * Now that the generic code is guaranteed not to be accessing
783 * the linux inode, we can reclaim the inode.
David Chinnerbf904242008-10-30 17:36:14 +1100784 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100786xfs_fs_destroy_inode(
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000787 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788{
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000789 struct xfs_inode *ip = XFS_I(inode);
790
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000791 trace_xfs_destroy_inode(ip);
David Chinner99fa8cb2008-10-30 17:36:40 +1100792
793 XFS_STATS_INC(vn_reclaim);
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000794
795 /* bad inode, get out here ASAP */
796 if (is_bad_inode(inode))
797 goto out_reclaim;
798
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000799 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
800
801 /*
802 * We should never get here with one of the reclaim flags already set.
803 */
804 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
805 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
806
807 /*
Dave Chinner57817c62010-01-10 23:51:47 +0000808 * We always use background reclaim here because even if the
809 * inode is clean, it still may be under IO and hence we have
810 * to take the flush lock. The background reclaim path handles
811 * this more efficiently than we can here, so simply let background
812 * reclaim tear down all inodes.
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000813 */
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000814out_reclaim:
Dave Chinner57817c62010-01-10 23:51:47 +0000815 xfs_inode_set_reclaim_tag(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816}
817
David Chinner07c8f672008-10-30 16:11:59 +1100818/*
819 * Slab object creation initialisation for the XFS inode.
820 * This covers only the idempotent fields in the XFS inode;
821 * all other fields need to be initialised on allocation
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400822 * from the slab. This avoids the need to repeatedly initialise
David Chinner07c8f672008-10-30 16:11:59 +1100823 * fields in the xfs inode that left in the initialise state
824 * when freeing the inode.
825 */
David Chinnerbf904242008-10-30 17:36:14 +1100826STATIC void
827xfs_fs_inode_init_once(
David Chinner07c8f672008-10-30 16:11:59 +1100828 void *inode)
829{
830 struct xfs_inode *ip = inode;
831
832 memset(ip, 0, sizeof(struct xfs_inode));
David Chinnerbf904242008-10-30 17:36:14 +1100833
834 /* vfs inode */
835 inode_init_once(VFS_I(ip));
836
837 /* xfs inode */
David Chinner07c8f672008-10-30 16:11:59 +1100838 atomic_set(&ip->i_pincount, 0);
839 spin_lock_init(&ip->i_flags_lock);
David Chinner07c8f672008-10-30 16:11:59 +1100840 init_waitqueue_head(&ip->i_ipin_wait);
841 /*
842 * Because we want to use a counting completion, complete
843 * the flush completion once to allow a single access to
844 * the flush completion without blocking.
845 */
846 init_completion(&ip->i_flush);
847 complete(&ip->i_flush);
848
849 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
850 "xfsino", ip->i_ino);
David Chinner07c8f672008-10-30 16:11:59 +1100851}
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853/*
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000854 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
Dave Chinnerdcd79a12010-09-28 12:27:25 +1000855 * we catch unlogged VFS level updates to the inode.
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000856 *
857 * We need the barrier() to maintain correct ordering between unlogged
858 * updates and the transaction commit code that clears the i_update_core
859 * field. This requires all updates to be completed before marking the
860 * inode dirty.
861 */
862STATIC void
863xfs_fs_dirty_inode(
Christoph Hellwigaa385722011-05-27 06:53:02 -0400864 struct inode *inode,
865 int flags)
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000866{
867 barrier();
868 XFS_I(inode)->i_update_core = 1;
869}
870
Christoph Hellwig07fec732010-02-09 11:43:49 +1100871STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +1100872xfs_fs_write_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 struct inode *inode,
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100874 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
Dave Chinner2e656092008-11-28 14:23:33 +1100876 struct xfs_inode *ip = XFS_I(inode);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100877 struct xfs_mount *mp = ip->i_mount;
Christoph Hellwig07fec732010-02-09 11:43:49 +1100878 int error = EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000880 trace_xfs_write_inode(ip);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100881
882 if (XFS_FORCED_SHUTDOWN(mp))
Christoph Hellwig58d84c42011-08-27 05:57:55 +0000883 return -XFS_ERROR(EIO);
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100884
Christoph Hellwig0b8fd302011-12-18 15:49:55 +0000885 if (wbc->sync_mode == WB_SYNC_ALL || wbc->for_kupdate) {
Christoph Hellwig07fec732010-02-09 11:43:49 +1100886 /*
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000887 * Make sure the inode has made it it into the log. Instead
888 * of forcing it all the way to stable storage using a
889 * synchronous transaction we let the log force inside the
890 * ->sync_fs call do that for thus, which reduces the number
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000891 * of synchronous log forces dramatically.
Christoph Hellwig07fec732010-02-09 11:43:49 +1100892 */
Christoph Hellwigbe4f1ac82011-12-20 20:08:41 +0000893 error = xfs_log_dirty_inode(ip, NULL, 0);
Christoph Hellwig58d84c42011-08-27 05:57:55 +0000894 if (error)
895 goto out;
896 return 0;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100897 } else {
Christoph Hellwigbe4f1ac82011-12-20 20:08:41 +0000898 if (!ip->i_update_core)
899 return 0;
900
Christoph Hellwig07fec732010-02-09 11:43:49 +1100901 /*
902 * We make this non-blocking if the inode is contended, return
903 * EAGAIN to indicate to the caller that they did not succeed.
904 * This prevents the flush path from blocking on inodes inside
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000905 * another operation right now, they get caught later by
906 * xfs_sync.
Christoph Hellwig07fec732010-02-09 11:43:49 +1100907 */
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100908 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
909 goto out;
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100910
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000911 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
912 goto out_unlock;
Christoph Hellwig07fec732010-02-09 11:43:49 +1100913
Christoph Hellwig7a36c8a2010-06-24 11:39:25 +1000914 /*
915 * Now we have the flush lock and the inode is not pinned, we
916 * can check if the inode is really clean as we know that
917 * there are no pending transaction completions, it is not
918 * waiting on the delayed write queue and there is no IO in
919 * progress.
920 */
921 if (xfs_inode_clean(ip)) {
922 xfs_ifunlock(ip);
923 error = 0;
924 goto out_unlock;
925 }
Dave Chinner1bfd8d02011-03-26 09:13:55 +1100926 error = xfs_iflush(ip, SYNC_TRYLOCK);
Christoph Hellwig07fec732010-02-09 11:43:49 +1100927 }
Christoph Hellwig07fec732010-02-09 11:43:49 +1100928
Christoph Hellwigd4bb6d02009-02-04 09:36:19 +0100929 out_unlock:
930 xfs_iunlock(ip, XFS_ILOCK_SHARED);
931 out:
Lachlan McIlroye893bff2007-10-12 11:13:35 +1000932 /*
933 * if we failed to write out the inode then mark
934 * it dirty again so we'll try again later.
935 */
936 if (error)
Dave Chinner2e656092008-11-28 14:23:33 +1100937 xfs_mark_inode_dirty_sync(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 return -error;
939}
940
941STATIC void
Al Virob57922d2010-06-07 14:34:48 -0400942xfs_fs_evict_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 struct inode *inode)
944{
Christoph Hellwig1543d792007-08-29 11:46:47 +1000945 xfs_inode_t *ip = XFS_I(inode);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000946
Al Virob57922d2010-06-07 14:34:48 -0400947 trace_xfs_evict_inode(ip);
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000948
Al Virob57922d2010-06-07 14:34:48 -0400949 truncate_inode_pages(&inode->i_data, 0);
950 end_writeback(inode);
David Chinner99fa8cb2008-10-30 17:36:40 +1100951 XFS_STATS_INC(vn_rele);
952 XFS_STATS_INC(vn_remove);
953 XFS_STATS_DEC(vn_active);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000954
Christoph Hellwig033da482009-10-19 04:05:26 +0000955 /*
956 * The iolock is used by the file system to coordinate reads,
957 * writes, and block truncates. Up to this point the lock
958 * protected concurrent accesses by users of the inode. But
959 * from here forward we're doing some final processing of the
960 * inode because we're done with it, and although we reuse the
961 * iolock for protection it is really a distinct lock class
962 * (in the lockdep sense) from before. To keep lockdep happy
963 * (and basically indicate what we are doing), we explicitly
964 * re-init the iolock here.
965 */
966 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
967 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
Dave Chinnerdcfcf202010-12-23 11:57:13 +1100968 lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
969 &xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
Christoph Hellwig033da482009-10-19 04:05:26 +0000970
David Chinner99fa8cb2008-10-30 17:36:40 +1100971 xfs_inactive(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972}
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974STATIC void
Christoph Hellwiga7381592008-08-13 16:04:05 +1000975xfs_free_fsname(
976 struct xfs_mount *mp)
977{
978 kfree(mp->m_fsname);
979 kfree(mp->m_rtname);
980 kfree(mp->m_logname);
981}
982
983STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100984xfs_fs_put_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 struct super_block *sb)
986{
Christoph Hellwig745f6912007-08-30 17:20:39 +1000987 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
David Chinnera167b172008-10-30 17:06:18 +1100989 xfs_syncd_stop(mp);
Christoph Hellwig075fe102009-06-08 15:35:48 +0200990
Christoph Hellwige48ad3162008-05-20 11:30:52 +1000991 /*
992 * Blow away any referenced inode in the filestreams cache.
993 * This can and will cause log traffic as inodes go inactive
994 * here.
995 */
996 xfs_filestream_unmount(mp);
997
Christoph Hellwiga9add832011-10-10 16:52:52 +0000998 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad3162008-05-20 11:30:52 +1000999
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001000 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001001 xfs_freesb(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001002 xfs_icsb_destroy_counters(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001003 xfs_close_devices(mp);
Christoph Hellwiga7381592008-08-13 16:04:05 +10001004 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001005 kfree(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006}
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008STATIC int
Christoph Hellwig69961a22009-10-06 20:29:28 +00001009xfs_fs_sync_fs(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 struct super_block *sb,
1011 int wait)
1012{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001013 struct xfs_mount *mp = XFS_M(sb);
Nathan Scottb83bd132006-06-09 16:48:30 +10001014 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001016 /*
Christoph Hellwig69961a22009-10-06 20:29:28 +00001017 * Not much we can do for the first async pass. Writing out the
1018 * superblock would be counter-productive as we are going to redirty
1019 * when writing out other data and metadata (and writing out a single
1020 * block is quite fast anyway).
1021 *
1022 * Try to asynchronously kick off quota syncing at least.
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001023 */
Christoph Hellwig69961a22009-10-06 20:29:28 +00001024 if (!wait) {
1025 xfs_qm_sync(mp, SYNC_TRYLOCK);
1026 return 0;
1027 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
Christoph Hellwig69961a22009-10-06 20:29:28 +00001029 error = xfs_quiesce_data(mp);
1030 if (error)
1031 return -error;
1032
1033 if (laptop_mode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 /*
1035 * The disk must be active because we're syncing.
1036 * We schedule xfssyncd now (now that the disk is
1037 * active) instead of later (when it might not be).
1038 */
Dave Chinnerc6d09b62011-04-08 12:45:07 +10001039 flush_delayed_work_sync(&mp->m_sync_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 }
1041
Christoph Hellwig69961a22009-10-06 20:29:28 +00001042 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043}
1044
1045STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001046xfs_fs_statfs(
David Howells726c3342006-06-23 02:02:58 -07001047 struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 struct kstatfs *statp)
1049{
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001050 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1051 xfs_sb_t *sbp = &mp->m_sb;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001052 struct xfs_inode *ip = XFS_I(dentry->d_inode);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001053 __uint64_t fakeinos, id;
1054 xfs_extlen_t lsize;
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001055 __int64_t ffree;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001056
1057 statp->f_type = XFS_SB_MAGIC;
1058 statp->f_namelen = MAXNAMELEN - 1;
1059
1060 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1061 statp->f_fsid.val[0] = (u32)id;
1062 statp->f_fsid.val[1] = (u32)(id >> 32);
1063
Christoph Hellwigd4d90b52008-04-22 17:34:37 +10001064 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001065
1066 spin_lock(&mp->m_sb_lock);
1067 statp->f_bsize = sbp->sb_blocksize;
1068 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1069 statp->f_blocks = sbp->sb_dblocks - lsize;
1070 statp->f_bfree = statp->f_bavail =
1071 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1072 fakeinos = statp->f_bfree << sbp->sb_inopblog;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001073 statp->f_files =
1074 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1075 if (mp->m_maxicount)
Christoph Hellwiga19d9f82009-03-29 09:51:08 +02001076 statp->f_files = min_t(typeof(statp->f_files),
1077 statp->f_files,
1078 mp->m_maxicount);
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001079
1080 /* make sure statp->f_ffree does not underflow */
1081 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1082 statp->f_ffree = max_t(__int64_t, ffree, 0);
1083
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001084 spin_unlock(&mp->m_sb_lock);
1085
Christoph Hellwig7d095252009-06-08 15:33:32 +02001086 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1087 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1088 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1089 xfs_qm_statvfs(ip, statp);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001090 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091}
1092
Eric Sandeend5db0f92010-02-05 22:59:53 +00001093STATIC void
1094xfs_save_resvblks(struct xfs_mount *mp)
1095{
1096 __uint64_t resblks = 0;
1097
1098 mp->m_resblks_save = mp->m_resblks;
1099 xfs_reserve_blocks(mp, &resblks, NULL);
1100}
1101
1102STATIC void
1103xfs_restore_resvblks(struct xfs_mount *mp)
1104{
1105 __uint64_t resblks;
1106
1107 if (mp->m_resblks_save) {
1108 resblks = mp->m_resblks_save;
1109 mp->m_resblks_save = 0;
1110 } else
1111 resblks = xfs_default_resblks(mp);
1112
1113 xfs_reserve_blocks(mp, &resblks, NULL);
1114}
1115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001117xfs_fs_remount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 struct super_block *sb,
1119 int *flags,
1120 char *options)
1121{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001122 struct xfs_mount *mp = XFS_M(sb);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001123 substring_t args[MAX_OPT_ARGS];
1124 char *p;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001125 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001127 while ((p = strsep(&options, ",")) != NULL) {
1128 int token;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001129
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001130 if (!*p)
1131 continue;
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001132
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001133 token = match_token(p, tokens, args);
1134 switch (token) {
1135 case Opt_barrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001136 mp->m_flags |= XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001137 break;
1138 case Opt_nobarrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001139 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001140 break;
1141 default:
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001142 /*
1143 * Logically we would return an error here to prevent
1144 * users from believing they might have changed
1145 * mount options using remount which can't be changed.
1146 *
1147 * But unfortunately mount(8) adds all options from
1148 * mtab and fstab to the mount arguments in some cases
1149 * so we can't blindly reject options, but have to
1150 * check for each specified option if it actually
1151 * differs from the currently set option and only
1152 * reject it if that's the case.
1153 *
1154 * Until that is implemented we return success for
1155 * every remount request, and silently ignore all
1156 * options that we can't actually change.
1157 */
1158#if 0
Dave Chinner4f107002011-03-07 10:00:35 +11001159 xfs_info(mp,
1160 "mount option \"%s\" not supported for remount\n", p);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001161 return -EINVAL;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001162#else
Christoph Hellwig6c5e51d2008-10-12 14:30:44 +02001163 break;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001164#endif
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001165 }
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001166 }
1167
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001168 /* ro -> rw */
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001169 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1170 mp->m_flags &= ~XFS_MOUNT_RDONLY;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001171
1172 /*
1173 * If this is the first remount to writeable state we
1174 * might have some superblock changes to update.
1175 */
1176 if (mp->m_update_flags) {
1177 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1178 if (error) {
Dave Chinner4f107002011-03-07 10:00:35 +11001179 xfs_warn(mp, "failed to write sb changes");
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001180 return error;
1181 }
1182 mp->m_update_flags = 0;
1183 }
Dave Chinnercbe132a2010-01-26 15:08:49 +11001184
1185 /*
1186 * Fill out the reserve pool if it is empty. Use the stashed
1187 * value if it is non-zero, otherwise go with the default.
1188 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001189 xfs_restore_resvblks(mp);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001190 }
1191
1192 /* rw -> ro */
1193 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
Dave Chinnercbe132a2010-01-26 15:08:49 +11001194 /*
1195 * After we have synced the data but before we sync the
1196 * metadata, we need to free up the reserve block pool so that
1197 * the used block count in the superblock on disk is correct at
1198 * the end of the remount. Stash the current reserve pool size
1199 * so that if we get remounted rw, we can return it to the same
1200 * size.
1201 */
Dave Chinnercbe132a2010-01-26 15:08:49 +11001202
David Chinnere9f1c6e2008-10-30 17:15:50 +11001203 xfs_quiesce_data(mp);
Eric Sandeend5db0f92010-02-05 22:59:53 +00001204 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001205 xfs_quiesce_attr(mp);
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001206 mp->m_flags |= XFS_MOUNT_RDONLY;
1207 }
1208
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001209 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210}
1211
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001212/*
1213 * Second stage of a freeze. The data is already frozen so we only
David Chinner76bf1052008-10-30 17:16:21 +11001214 * need to take care of the metadata. Once that's done write a dummy
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001215 * record to dirty the log in case of a crash while frozen.
1216 */
Takashi Satoc4be0c12009-01-09 16:40:58 -08001217STATIC int
1218xfs_fs_freeze(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 struct super_block *sb)
1220{
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001221 struct xfs_mount *mp = XFS_M(sb);
1222
Eric Sandeend5db0f92010-02-05 22:59:53 +00001223 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001224 xfs_quiesce_attr(mp);
Dave Chinnerc58efdb2011-01-04 04:49:29 +00001225 return -xfs_fs_log_dummy(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226}
1227
1228STATIC int
Eric Sandeend5db0f92010-02-05 22:59:53 +00001229xfs_fs_unfreeze(
1230 struct super_block *sb)
1231{
1232 struct xfs_mount *mp = XFS_M(sb);
1233
1234 xfs_restore_resvblks(mp);
1235 return 0;
1236}
1237
1238STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001239xfs_fs_show_options(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 struct seq_file *m,
Al Viro34c80b12011-12-08 21:32:45 -05001241 struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242{
Al Viro34c80b12011-12-08 21:32:45 -05001243 return -xfs_showargs(XFS_M(root->d_sb), m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244}
1245
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001246/*
1247 * This function fills in xfs_mount_t fields based on mount args.
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001248 * Note: the superblock _has_ now been read in.
1249 */
1250STATIC int
1251xfs_finish_flags(
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001252 struct xfs_mount *mp)
1253{
1254 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1255
Frederik Schwarzer025dfda2008-10-16 19:02:37 +02001256 /* Fail a mount where the logbuf is smaller than the log stripe */
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001257 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001258 if (mp->m_logbsize <= 0 &&
1259 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001260 mp->m_logbsize = mp->m_sb.sb_logsunit;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001261 } else if (mp->m_logbsize > 0 &&
1262 mp->m_logbsize < mp->m_sb.sb_logsunit) {
Dave Chinner4f107002011-03-07 10:00:35 +11001263 xfs_warn(mp,
1264 "logbuf size must be greater than or equal to log stripe size");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001265 return XFS_ERROR(EINVAL);
1266 }
1267 } else {
1268 /* Fail a mount if the logbuf is larger than 32K */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001269 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
Dave Chinner4f107002011-03-07 10:00:35 +11001270 xfs_warn(mp,
1271 "logbuf size for version 1 logs must be 16K or 32K");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001272 return XFS_ERROR(EINVAL);
1273 }
1274 }
1275
1276 /*
1277 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1278 * told by noattr2 to turn it off
1279 */
1280 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001281 !(mp->m_flags & XFS_MOUNT_NOATTR2))
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001282 mp->m_flags |= XFS_MOUNT_ATTR2;
1283
1284 /*
1285 * prohibit r/w mounts of read-only filesystems
1286 */
1287 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
Dave Chinner4f107002011-03-07 10:00:35 +11001288 xfs_warn(mp,
1289 "cannot mount a read-only filesystem as read-write");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001290 return XFS_ERROR(EROFS);
1291 }
1292
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001293 return 0;
1294}
1295
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001297xfs_fs_fill_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 struct super_block *sb,
1299 void *data,
1300 int silent)
1301{
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001302 struct inode *root;
Christoph Hellwig745f6912007-08-30 17:20:39 +10001303 struct xfs_mount *mp = NULL;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001304 int flags = 0, error = ENOMEM;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001305
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001306 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1307 if (!mp)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001308 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001310 spin_lock_init(&mp->m_sb_lock);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001311 mutex_init(&mp->m_growlock);
1312 atomic_set(&mp->m_active_trans, 0);
Christoph Hellwig74394492007-08-30 17:21:22 +10001313
Christoph Hellwigb267ce92007-08-30 17:21:30 +10001314 mp->m_super = sb;
1315 sb->s_fs_info = mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
Christoph Hellwig288699f2010-06-23 18:11:15 +10001317 error = xfs_parseargs(mp, (char *)data);
Christoph Hellwig745f6912007-08-30 17:20:39 +10001318 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001319 goto out_free_fsname;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
1321 sb_min_blocksize(sb, BBSIZE);
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001322 sb->s_xattr = xfs_xattr_handlers;
Nathan Scotta50cd262006-03-14 14:06:18 +11001323 sb->s_export_op = &xfs_export_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001324#ifdef CONFIG_XFS_QUOTA
Nathan Scotta50cd262006-03-14 14:06:18 +11001325 sb->s_qcop = &xfs_quotactl_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001326#endif
Nathan Scotta50cd262006-03-14 14:06:18 +11001327 sb->s_op = &xfs_super_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001329 if (silent)
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001330 flags |= XFS_MFSI_QUIET;
1331
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001332 error = xfs_open_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001333 if (error)
Christoph Hellwig288699f2010-06-23 18:11:15 +10001334 goto out_free_fsname;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001335
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001336 error = xfs_icsb_init_counters(mp);
1337 if (error)
1338 goto out_close_devices;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001339
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001340 error = xfs_readsb(mp, flags);
1341 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001342 goto out_destroy_counters;
1343
1344 error = xfs_finish_flags(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001345 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001346 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001347
Christoph Hellwige34b5622008-05-20 15:10:36 +10001348 error = xfs_setup_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001349 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001350 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001351
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001352 error = xfs_filestream_mount(mp);
1353 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001354 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001355
Dave Chinner704b2902011-03-26 09:14:57 +11001356 /*
1357 * we must configure the block size in the superblock before we run the
1358 * full mount process as the mount process can lookup and cache inodes.
1359 * For the same reason we must also initialise the syncd and register
1360 * the inode cache shrinker so that inodes can be reclaimed during
1361 * operations like a quotacheck that iterate all inodes in the
1362 * filesystem.
1363 */
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001364 sb->s_magic = XFS_SB_MAGIC;
1365 sb->s_blocksize = mp->m_sb.sb_blocksize;
1366 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1368 sb->s_time_gran = 1;
1369 set_posix_acl_flag(sb);
1370
Dave Chinner704b2902011-03-26 09:14:57 +11001371 error = xfs_mountfs(mp);
1372 if (error)
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001373 goto out_filestream_unmount;
1374
1375 error = xfs_syncd_init(mp);
1376 if (error)
1377 goto out_unmount;
Dave Chinner704b2902011-03-26 09:14:57 +11001378
David Chinner01651642008-08-13 15:45:15 +10001379 root = igrab(VFS_I(mp->m_rootip));
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001380 if (!root) {
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001381 error = ENOENT;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001382 goto out_syncd_stop;
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001383 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001384 if (is_bad_inode(root)) {
1385 error = EINVAL;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001386 goto out_syncd_stop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 }
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001388 sb->s_root = d_alloc_root(root);
1389 if (!sb->s_root) {
1390 error = ENOMEM;
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001391 goto out_iput;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 }
Christoph Hellwig74394492007-08-30 17:21:22 +10001393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 return 0;
1395
Christoph Hellwig120226c2008-05-20 15:11:11 +10001396 out_filestream_unmount:
1397 xfs_filestream_unmount(mp);
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001398 out_free_sb:
1399 xfs_freesb(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001400 out_destroy_counters:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001401 xfs_icsb_destroy_counters(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001402 out_close_devices:
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001403 xfs_close_devices(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001404 out_free_fsname:
1405 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001406 kfree(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001407 out:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001408 return -error;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001409
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001410 out_iput:
1411 iput(root);
1412 out_syncd_stop:
Dave Chinner704b2902011-03-26 09:14:57 +11001413 xfs_syncd_stop(mp);
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001414 out_unmount:
Christoph Hellwige48ad3162008-05-20 11:30:52 +10001415 /*
1416 * Blow away any referenced inode in the filestreams cache.
1417 * This can and will cause log traffic as inodes go inactive
1418 * here.
1419 */
1420 xfs_filestream_unmount(mp);
1421
Christoph Hellwiga9add832011-10-10 16:52:52 +00001422 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Christoph Hellwige48ad3162008-05-20 11:30:52 +10001423
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001424 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001425 goto out_free_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426}
1427
Al Viro152a0832010-07-25 00:46:55 +04001428STATIC struct dentry *
1429xfs_fs_mount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 struct file_system_type *fs_type,
1431 int flags,
1432 const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04001433 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434{
Al Viro152a0832010-07-25 00:46:55 +04001435 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436}
1437
Dave Chinner8daaa832011-07-08 14:14:46 +10001438static int
1439xfs_fs_nr_cached_objects(
1440 struct super_block *sb)
1441{
1442 return xfs_reclaim_inodes_count(XFS_M(sb));
1443}
1444
1445static void
1446xfs_fs_free_cached_objects(
1447 struct super_block *sb,
1448 int nr_to_scan)
1449{
1450 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1451}
1452
Alexey Dobriyanb87221d2009-09-21 17:01:09 -07001453static const struct super_operations xfs_super_operations = {
Nathan Scotta50cd262006-03-14 14:06:18 +11001454 .alloc_inode = xfs_fs_alloc_inode,
1455 .destroy_inode = xfs_fs_destroy_inode,
Christoph Hellwigf9581b12009-10-06 20:29:26 +00001456 .dirty_inode = xfs_fs_dirty_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001457 .write_inode = xfs_fs_write_inode,
Al Virob57922d2010-06-07 14:34:48 -04001458 .evict_inode = xfs_fs_evict_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001459 .put_super = xfs_fs_put_super,
Christoph Hellwig69961a22009-10-06 20:29:28 +00001460 .sync_fs = xfs_fs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -08001461 .freeze_fs = xfs_fs_freeze,
Eric Sandeend5db0f92010-02-05 22:59:53 +00001462 .unfreeze_fs = xfs_fs_unfreeze,
Nathan Scotta50cd262006-03-14 14:06:18 +11001463 .statfs = xfs_fs_statfs,
1464 .remount_fs = xfs_fs_remount,
1465 .show_options = xfs_fs_show_options,
Dave Chinner8daaa832011-07-08 14:14:46 +10001466 .nr_cached_objects = xfs_fs_nr_cached_objects,
1467 .free_cached_objects = xfs_fs_free_cached_objects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468};
1469
Andrew Morton5085b602007-02-20 13:57:47 -08001470static struct file_system_type xfs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 .owner = THIS_MODULE,
1472 .name = "xfs",
Al Viro152a0832010-07-25 00:46:55 +04001473 .mount = xfs_fs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 .kill_sb = kill_block_super,
1475 .fs_flags = FS_REQUIRES_DEV,
1476};
1477
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001478STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001479xfs_init_zones(void)
1480{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001481
1482 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1483 if (!xfs_ioend_zone)
David Chinnerbf904242008-10-30 17:36:14 +11001484 goto out;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001485
1486 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1487 xfs_ioend_zone);
1488 if (!xfs_ioend_pool)
1489 goto out_destroy_ioend_zone;
1490
1491 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1492 "xfs_log_ticket");
1493 if (!xfs_log_ticket_zone)
1494 goto out_destroy_ioend_pool;
1495
1496 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1497 "xfs_bmap_free_item");
1498 if (!xfs_bmap_free_item_zone)
1499 goto out_destroy_log_ticket_zone;
David Chinnerbf904242008-10-30 17:36:14 +11001500
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001501 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1502 "xfs_btree_cur");
1503 if (!xfs_btree_cur_zone)
1504 goto out_destroy_bmap_free_item_zone;
1505
1506 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1507 "xfs_da_state");
1508 if (!xfs_da_state_zone)
1509 goto out_destroy_btree_cur_zone;
1510
1511 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1512 if (!xfs_dabuf_zone)
1513 goto out_destroy_da_state_zone;
1514
1515 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1516 if (!xfs_ifork_zone)
1517 goto out_destroy_dabuf_zone;
1518
1519 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1520 if (!xfs_trans_zone)
1521 goto out_destroy_ifork_zone;
1522
Christoph Hellwige98c4142010-06-23 18:11:15 +10001523 xfs_log_item_desc_zone =
1524 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1525 "xfs_log_item_desc");
1526 if (!xfs_log_item_desc_zone)
1527 goto out_destroy_trans_zone;
1528
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001529 /*
1530 * The size of the zone allocated buf log item is the maximum
1531 * size possible under XFS. This wastes a little bit of memory,
1532 * but it is much faster.
1533 */
1534 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
Dave Chinnerc1155412010-05-07 11:05:19 +10001535 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001536 NBWORD) * sizeof(int))), "xfs_buf_item");
1537 if (!xfs_buf_item_zone)
Christoph Hellwige98c4142010-06-23 18:11:15 +10001538 goto out_destroy_log_item_desc_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001539
1540 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1541 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1542 sizeof(xfs_extent_t))), "xfs_efd_item");
1543 if (!xfs_efd_zone)
1544 goto out_destroy_buf_item_zone;
1545
1546 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1547 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1548 sizeof(xfs_extent_t))), "xfs_efi_item");
1549 if (!xfs_efi_zone)
1550 goto out_destroy_efd_zone;
1551
1552 xfs_inode_zone =
1553 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
David Chinnerbf904242008-10-30 17:36:14 +11001554 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1555 xfs_fs_inode_init_once);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001556 if (!xfs_inode_zone)
1557 goto out_destroy_efi_zone;
1558
1559 xfs_ili_zone =
1560 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1561 KM_ZONE_SPREAD, NULL);
1562 if (!xfs_ili_zone)
1563 goto out_destroy_inode_zone;
1564
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001565 return 0;
1566
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001567 out_destroy_inode_zone:
1568 kmem_zone_destroy(xfs_inode_zone);
1569 out_destroy_efi_zone:
1570 kmem_zone_destroy(xfs_efi_zone);
1571 out_destroy_efd_zone:
1572 kmem_zone_destroy(xfs_efd_zone);
1573 out_destroy_buf_item_zone:
1574 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001575 out_destroy_log_item_desc_zone:
1576 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001577 out_destroy_trans_zone:
1578 kmem_zone_destroy(xfs_trans_zone);
1579 out_destroy_ifork_zone:
1580 kmem_zone_destroy(xfs_ifork_zone);
1581 out_destroy_dabuf_zone:
1582 kmem_zone_destroy(xfs_dabuf_zone);
1583 out_destroy_da_state_zone:
1584 kmem_zone_destroy(xfs_da_state_zone);
1585 out_destroy_btree_cur_zone:
1586 kmem_zone_destroy(xfs_btree_cur_zone);
1587 out_destroy_bmap_free_item_zone:
1588 kmem_zone_destroy(xfs_bmap_free_item_zone);
1589 out_destroy_log_ticket_zone:
1590 kmem_zone_destroy(xfs_log_ticket_zone);
1591 out_destroy_ioend_pool:
1592 mempool_destroy(xfs_ioend_pool);
1593 out_destroy_ioend_zone:
1594 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001595 out:
1596 return -ENOMEM;
1597}
1598
1599STATIC void
1600xfs_destroy_zones(void)
1601{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001602 kmem_zone_destroy(xfs_ili_zone);
1603 kmem_zone_destroy(xfs_inode_zone);
1604 kmem_zone_destroy(xfs_efi_zone);
1605 kmem_zone_destroy(xfs_efd_zone);
1606 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001607 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001608 kmem_zone_destroy(xfs_trans_zone);
1609 kmem_zone_destroy(xfs_ifork_zone);
1610 kmem_zone_destroy(xfs_dabuf_zone);
1611 kmem_zone_destroy(xfs_da_state_zone);
1612 kmem_zone_destroy(xfs_btree_cur_zone);
1613 kmem_zone_destroy(xfs_bmap_free_item_zone);
1614 kmem_zone_destroy(xfs_log_ticket_zone);
1615 mempool_destroy(xfs_ioend_pool);
1616 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001617
1618}
1619
1620STATIC int __init
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001621xfs_init_workqueues(void)
1622{
1623 /*
1624 * max_active is set to 8 to give enough concurency to allow
1625 * multiple work operations on each CPU to run. This allows multiple
1626 * filesystems to be running sync work concurrently, and scales with
1627 * the number of CPUs in the system.
1628 */
1629 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
1630 if (!xfs_syncd_wq)
Christoph Hellwig00308072011-10-11 11:14:10 -04001631 return -ENOMEM;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001632 return 0;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001633}
1634
Luck, Tony39411f82011-04-11 12:06:12 -07001635STATIC void
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001636xfs_destroy_workqueues(void)
1637{
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001638 destroy_workqueue(xfs_syncd_wq);
1639}
1640
1641STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001642init_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643{
1644 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
Christoph Hellwig65795912008-11-28 14:23:33 +11001646 printk(KERN_INFO XFS_VERSION_STRING " with "
1647 XFS_BUILD_OPTIONS " enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001649 xfs_dir_startup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650
Nathan Scott87582802006-03-14 13:18:19 +11001651 error = xfs_init_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001652 if (error)
1653 goto out;
1654
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001655 error = xfs_init_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001656 if (error)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001657 goto out_destroy_zones;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001658
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001659 error = xfs_mru_cache_init();
1660 if (error)
1661 goto out_destroy_wq;
1662
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001663 error = xfs_filestream_init();
1664 if (error)
1665 goto out_mru_cache_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Nathan Scottce8e9222006-01-11 15:39:08 +11001667 error = xfs_buf_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001668 if (error)
1669 goto out_filestream_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001671 error = xfs_init_procfs();
1672 if (error)
1673 goto out_buf_terminate;
1674
1675 error = xfs_sysctl_register();
1676 if (error)
1677 goto out_cleanup_procfs;
1678
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 vfs_initquota();
1680
1681 error = register_filesystem(&xfs_fs_type);
1682 if (error)
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001683 goto out_sysctl_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 return 0;
1685
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001686 out_sysctl_unregister:
1687 xfs_sysctl_unregister();
1688 out_cleanup_procfs:
1689 xfs_cleanup_procfs();
1690 out_buf_terminate:
Nathan Scottce8e9222006-01-11 15:39:08 +11001691 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001692 out_filestream_uninit:
1693 xfs_filestream_uninit();
1694 out_mru_cache_uninit:
1695 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001696 out_destroy_wq:
1697 xfs_destroy_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001698 out_destroy_zones:
Nathan Scott87582802006-03-14 13:18:19 +11001699 xfs_destroy_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001700 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 return error;
1702}
1703
1704STATIC void __exit
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001705exit_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706{
1707 vfs_exitquota();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 unregister_filesystem(&xfs_fs_type);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001709 xfs_sysctl_unregister();
1710 xfs_cleanup_procfs();
Nathan Scottce8e9222006-01-11 15:39:08 +11001711 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001712 xfs_filestream_uninit();
1713 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001714 xfs_destroy_workqueues();
Nathan Scott87582802006-03-14 13:18:19 +11001715 xfs_destroy_zones();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716}
1717
1718module_init(init_xfs_fs);
1719module_exit(exit_xfs_fs);
1720
1721MODULE_AUTHOR("Silicon Graphics, Inc.");
1722MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1723MODULE_LICENSE("GPL");