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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scotta805bad2006-06-19 08:40:27 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000018
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "xfs.h"
Dave Chinner70a9883c2013-10-23 10:36:05 +110020#include "xfs_shared.h"
Dave Chinner6ca1c902013-08-12 20:49:26 +100021#include "xfs_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110022#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Dave Chinner57062782013-10-15 09:17:51 +110028#include "xfs_da_format.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110030#include "xfs_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_bmap.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110032#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_error.h"
Christoph Hellwig9909c4a2007-10-11 18:11:14 +100034#include "xfs_fsops.h"
Dave Chinner239880e2013-10-23 10:50:10 +110035#include "xfs_trans.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include "xfs_buf_item.h"
Dave Chinner239880e2013-10-23 10:50:10 +110037#include "xfs_log.h"
David Chinnera67d7c52007-11-23 16:29:32 +110038#include "xfs_log_priv.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100039#include "xfs_da_btree.h"
Dave Chinner2b9ab5a2013-08-12 20:49:37 +100040#include "xfs_dir2.h"
Christoph Hellwig9f8868f2008-07-18 17:11:46 +100041#include "xfs_extfree_item.h"
42#include "xfs_mru_cache.h"
43#include "xfs_inode_item.h"
Dave Chinner6d8b79c2012-10-08 21:56:09 +110044#include "xfs_icache.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000045#include "xfs_trace.h"
Dave Chinner3ebe7d22013-06-27 16:04:53 +100046#include "xfs_icreate_item.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110047#include "xfs_dinode.h"
48#include "xfs_filestream.h"
49#include "xfs_quota.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#include <linux/namei.h>
52#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090053#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/mount.h>
Christoph Hellwig0829c362005-09-02 16:58:49 +100055#include <linux/mempool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#include <linux/writeback.h>
Christoph Hellwig4df08c52005-09-05 08:34:18 +100057#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080058#include <linux/freezer.h>
Christoph Hellwig62a877e2008-07-18 17:12:36 +100059#include <linux/parser.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Alexey Dobriyanb87221d2009-09-21 17:01:09 -070061static const struct super_operations xfs_super_operations;
David Chinner7989cb82007-02-10 18:34:56 +110062static kmem_zone_t *xfs_ioend_zone;
Christoph Hellwig0829c362005-09-02 16:58:49 +100063mempool_t *xfs_ioend_pool;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
David Chinnera67d7c52007-11-23 16:29:32 +110065#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
66#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
67#define MNTOPT_LOGDEV "logdev" /* log device */
68#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
69#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
70#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
David Chinnera67d7c52007-11-23 16:29:32 +110071#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
72#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
73#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
74#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
75#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
76#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
77#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
78#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
79#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
80#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
81#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
82#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
83#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
84 * unwritten extent conversion */
85#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
David Chinnera67d7c52007-11-23 16:29:32 +110086#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
Carlos Maiolino08bf5402012-09-20 10:32:37 -030087#define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
88 * XFS_MAXINUMBER_32 */
David Chinnera67d7c52007-11-23 16:29:32 +110089#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
90#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
91#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
92#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
93 * in stat(). */
94#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
95#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
96#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
97#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
98#define MNTOPT_NOQUOTA "noquota" /* no quotas */
99#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
100#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
101#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
102#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
103#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
104#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
105#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
106#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
107#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
108#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000109#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
110#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
111#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
112#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
David Chinnera67d7c52007-11-23 16:29:32 +1100113
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000114/*
115 * Table driven mount option parser.
116 *
117 * Currently only used for remount, but it will be used for mount
118 * in the future, too.
119 */
120enum {
Carlos Maiolino2ea03922012-09-20 10:32:41 -0300121 Opt_barrier,
122 Opt_nobarrier,
123 Opt_inode64,
124 Opt_inode32,
125 Opt_err
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000126};
127
Steven Whitehousea447c092008-10-13 10:46:57 +0100128static const match_table_t tokens = {
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000129 {Opt_barrier, "barrier"},
130 {Opt_nobarrier, "nobarrier"},
Carlos Maiolinoc3a58fe2012-08-17 18:19:38 -0300131 {Opt_inode64, "inode64"},
Carlos Maiolino2ea03922012-09-20 10:32:41 -0300132 {Opt_inode32, "inode32"},
Christoph Hellwig62a877e2008-07-18 17:12:36 +1000133 {Opt_err, NULL}
134};
135
136
David Chinnera67d7c52007-11-23 16:29:32 +1100137STATIC unsigned long
Abhijit Pawara17164e2013-01-09 19:34:42 +0530138suffix_kstrtoint(char *s, unsigned int base, int *res)
David Chinnera67d7c52007-11-23 16:29:32 +1100139{
Abhijit Pawara17164e2013-01-09 19:34:42 +0530140 int last, shift_left_factor = 0, _res;
David Chinnera67d7c52007-11-23 16:29:32 +1100141 char *value = s;
142
143 last = strlen(value) - 1;
144 if (value[last] == 'K' || value[last] == 'k') {
145 shift_left_factor = 10;
146 value[last] = '\0';
147 }
148 if (value[last] == 'M' || value[last] == 'm') {
149 shift_left_factor = 20;
150 value[last] = '\0';
151 }
152 if (value[last] == 'G' || value[last] == 'g') {
153 shift_left_factor = 30;
154 value[last] = '\0';
155 }
156
Abhijit Pawara17164e2013-01-09 19:34:42 +0530157 if (kstrtoint(s, base, &_res))
158 return -EINVAL;
159 *res = _res << shift_left_factor;
160 return 0;
David Chinnera67d7c52007-11-23 16:29:32 +1100161}
162
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100163/*
164 * This function fills in xfs_mount_t fields based on mount args.
165 * Note: the superblock has _not_ yet been read in.
166 *
167 * Note that this function leaks the various device name allocations on
168 * failure. The caller takes care of them.
169 */
David Chinnera67d7c52007-11-23 16:29:32 +1100170STATIC int
171xfs_parseargs(
172 struct xfs_mount *mp,
Christoph Hellwig288699f2010-06-23 18:11:15 +1000173 char *options)
David Chinnera67d7c52007-11-23 16:29:32 +1100174{
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100175 struct super_block *sb = mp->m_super;
Abhijit Pawara17164e2013-01-09 19:34:42 +0530176 char *this_char, *value;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100177 int dsunit = 0;
178 int dswidth = 0;
179 int iosize = 0;
Christoph Hellwiga5687782009-02-09 08:37:39 +0100180 __uint8_t iosizelog = 0;
David Chinnera67d7c52007-11-23 16:29:32 +1100181
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100182 /*
Dave Chinner4f107002011-03-07 10:00:35 +1100183 * set up the mount name first so all the errors will refer to the
184 * correct device.
185 */
186 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
187 if (!mp->m_fsname)
188 return ENOMEM;
189 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
190
191 /*
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100192 * Copy binary VFS mount flags we are interested in.
193 */
194 if (sb->s_flags & MS_RDONLY)
195 mp->m_flags |= XFS_MOUNT_RDONLY;
196 if (sb->s_flags & MS_DIRSYNC)
197 mp->m_flags |= XFS_MOUNT_DIRSYNC;
198 if (sb->s_flags & MS_SYNCHRONOUS)
199 mp->m_flags |= XFS_MOUNT_WSYNC;
200
201 /*
202 * Set some default flags that could be cleared by the mount option
203 * parsing.
204 */
205 mp->m_flags |= XFS_MOUNT_BARRIER;
206 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
Carlos Maiolino08bf5402012-09-20 10:32:37 -0300207#if !XFS_BIG_INUMS
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100208 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
Carlos Maiolino08bf5402012-09-20 10:32:37 -0300209#endif
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100210
211 /*
212 * These can be overridden by the mount option parsing.
213 */
214 mp->m_logbufs = -1;
215 mp->m_logbsize = -1;
David Chinnera67d7c52007-11-23 16:29:32 +1100216
217 if (!options)
218 goto done;
219
David Chinnera67d7c52007-11-23 16:29:32 +1100220 while ((this_char = strsep(&options, ",")) != NULL) {
221 if (!*this_char)
222 continue;
223 if ((value = strchr(this_char, '=')) != NULL)
224 *value++ = 0;
225
226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
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 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530232 if (kstrtoint(value, 10, &mp->m_logbufs))
233 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
235 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100236 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100237 this_char);
238 return EINVAL;
239 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
241 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
243 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100244 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100245 this_char);
246 return EINVAL;
247 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 if (!mp->m_logname)
250 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100251 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100252 xfs_warn(mp, "%s option not allowed on this system",
Christoph Hellwig288699f2010-06-23 18:11:15 +1000253 this_char);
254 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
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 }
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
262 if (!mp->m_rtname)
263 return ENOMEM;
David Chinnera67d7c52007-11-23 16:29:32 +1100264 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
265 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100266 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100267 this_char);
268 return EINVAL;
269 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530270 if (kstrtoint(value, 10, &iosize))
271 return EINVAL;
Christoph Hellwig1ec79442008-10-30 17:55:08 +1100272 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100273 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
274 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100275 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100276 this_char);
277 return EINVAL;
278 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530279 if (suffix_kstrtoint(value, 10, &iosize))
280 return EINVAL;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100281 iosizelog = ffs(iosize) - 1;
David Chinnera67d7c52007-11-23 16:29:32 +1100282 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
283 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
284 mp->m_flags |= XFS_MOUNT_GRPID;
285 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
286 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
287 mp->m_flags &= ~XFS_MOUNT_GRPID;
288 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100289 mp->m_flags |= XFS_MOUNT_WSYNC;
David Chinnera67d7c52007-11-23 16:29:32 +1100290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100291 mp->m_flags |= XFS_MOUNT_NORECOVERY;
David Chinnera67d7c52007-11-23 16:29:32 +1100292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100293 mp->m_flags |= XFS_MOUNT_NOALIGN;
David Chinnera67d7c52007-11-23 16:29:32 +1100294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100295 mp->m_flags |= XFS_MOUNT_SWALLOC;
David Chinnera67d7c52007-11-23 16:29:32 +1100296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
297 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100298 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100299 this_char);
300 return EINVAL;
301 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530302 if (kstrtoint(value, 10, &dsunit))
303 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
305 if (!value || !*value) {
Dave Chinner4f107002011-03-07 10:00:35 +1100306 xfs_warn(mp, "%s option requires an argument",
David Chinnera67d7c52007-11-23 16:29:32 +1100307 this_char);
308 return EINVAL;
309 }
Abhijit Pawara17164e2013-01-09 19:34:42 +0530310 if (kstrtoint(value, 10, &dswidth))
311 return EINVAL;
Carlos Maiolino08bf5402012-09-20 10:32:37 -0300312 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
313 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100314 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100315 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100316#if !XFS_BIG_INUMS
Dave Chinner4f107002011-03-07 10:00:35 +1100317 xfs_warn(mp, "%s option not allowed on this system",
David Chinnera67d7c52007-11-23 16:29:32 +1100318 this_char);
319 return EINVAL;
320#endif
321 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100322 mp->m_flags |= XFS_MOUNT_NOUUID;
David Chinnera67d7c52007-11-23 16:29:32 +1100323 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100324 mp->m_flags |= XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100325 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100326 mp->m_flags &= ~XFS_MOUNT_BARRIER;
David Chinnera67d7c52007-11-23 16:29:32 +1100327 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100328 mp->m_flags |= XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100329 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100330 mp->m_flags &= ~XFS_MOUNT_IKEEP;
David Chinnera67d7c52007-11-23 16:29:32 +1100331 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100332 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100333 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100334 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
David Chinnera67d7c52007-11-23 16:29:32 +1100335 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100336 mp->m_flags |= XFS_MOUNT_ATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100337 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100338 mp->m_flags &= ~XFS_MOUNT_ATTR2;
339 mp->m_flags |= XFS_MOUNT_NOATTR2;
David Chinnera67d7c52007-11-23 16:29:32 +1100340 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100341 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
David Chinnera67d7c52007-11-23 16:29:32 +1100342 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
Chandra Seetharaman4177af32012-01-23 17:31:43 +0000343 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
344 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
345 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
David Chinnera67d7c52007-11-23 16:29:32 +1100346 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
347 !strcmp(this_char, MNTOPT_UQUOTA) ||
348 !strcmp(this_char, MNTOPT_USRQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100349 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
350 XFS_UQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100351 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
352 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
354 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100355 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
356 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100357 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500358 XFS_PQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100359 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100360 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500361 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
David Chinnera67d7c52007-11-23 16:29:32 +1100362 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
363 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100364 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500365 XFS_GQUOTA_ENFD);
David Chinnera67d7c52007-11-23 16:29:32 +1100366 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100367 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500368 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
Dave Chinner71e330b2010-05-21 14:37:18 +1000369 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
Christoph Hellwig242d6212011-08-24 05:57:51 +0000370 xfs_warn(mp,
Christoph Hellwig93b8a582011-12-06 21:58:07 +0000371 "delaylog is the default now, option is deprecated.");
372 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
373 xfs_warn(mp,
374 "nodelaylog support has been removed, option is deprecated.");
Christoph Hellwige84661a2011-05-20 13:45:32 +0000375 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
376 mp->m_flags |= XFS_MOUNT_DISCARD;
377 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
378 mp->m_flags &= ~XFS_MOUNT_DISCARD;
David Chinnera67d7c52007-11-23 16:29:32 +1100379 } else if (!strcmp(this_char, "ihashsize")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100380 xfs_warn(mp,
381 "ihashsize no longer used, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100382 } else if (!strcmp(this_char, "osyncisdsync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100383 xfs_warn(mp,
384 "osyncisdsync has no effect, option is deprecated.");
Christoph Hellwiga64afb02010-07-20 17:50:52 +1000385 } else if (!strcmp(this_char, "osyncisosync")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100386 xfs_warn(mp,
387 "osyncisosync has no effect, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100388 } else if (!strcmp(this_char, "irixsgid")) {
Dave Chinner4f107002011-03-07 10:00:35 +1100389 xfs_warn(mp,
390 "irixsgid is now a sysctl(2) variable, option is deprecated.");
David Chinnera67d7c52007-11-23 16:29:32 +1100391 } else {
Dave Chinner4f107002011-03-07 10:00:35 +1100392 xfs_warn(mp, "unknown mount option [%s].", this_char);
David Chinnera67d7c52007-11-23 16:29:32 +1100393 return EINVAL;
394 }
395 }
396
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100397 /*
398 * no recovery flag requires a read-only mount
399 */
400 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
401 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100402 xfs_warn(mp, "no-recovery mounts must be read-only.");
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100403 return EINVAL;
David Chinnera67d7c52007-11-23 16:29:32 +1100404 }
405
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100406 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100407 xfs_warn(mp,
408 "sunit and swidth options incompatible with the noalign option");
David Chinnera67d7c52007-11-23 16:29:32 +1100409 return EINVAL;
410 }
411
Christoph Hellwig7d095252009-06-08 15:33:32 +0200412#ifndef CONFIG_XFS_QUOTA
413 if (XFS_IS_QUOTA_RUNNING(mp)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100414 xfs_warn(mp, "quota support not available in this kernel.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200415 return EINVAL;
416 }
417#endif
418
David Chinnera67d7c52007-11-23 16:29:32 +1100419 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100420 xfs_warn(mp, "sunit and swidth must be specified together");
David Chinnera67d7c52007-11-23 16:29:32 +1100421 return EINVAL;
422 }
423
424 if (dsunit && (dswidth % dsunit != 0)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100425 xfs_warn(mp,
426 "stripe width (%d) must be a multiple of the stripe unit (%d)",
David Chinnera67d7c52007-11-23 16:29:32 +1100427 dswidth, dsunit);
428 return EINVAL;
429 }
430
David Chinnera67d7c52007-11-23 16:29:32 +1100431done:
Jie Liu39a45d82013-05-02 19:27:47 +0800432 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100433 /*
434 * At this point the superblock has not been read
435 * in, therefore we do not know the block size.
436 * Before the mount call ends we will convert
437 * these to FSBs.
438 */
Jie Liu39a45d82013-05-02 19:27:47 +0800439 mp->m_dalign = dsunit;
440 mp->m_swidth = dswidth;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100441 }
442
443 if (mp->m_logbufs != -1 &&
444 mp->m_logbufs != 0 &&
445 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
446 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
Dave Chinner4f107002011-03-07 10:00:35 +1100447 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100448 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
449 return XFS_ERROR(EINVAL);
450 }
451 if (mp->m_logbsize != -1 &&
452 mp->m_logbsize != 0 &&
453 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
454 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
455 !is_power_of_2(mp->m_logbsize))) {
Dave Chinner4f107002011-03-07 10:00:35 +1100456 xfs_warn(mp,
457 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100458 mp->m_logbsize);
459 return XFS_ERROR(EINVAL);
460 }
461
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100462 if (iosizelog) {
463 if (iosizelog > XFS_MAX_IO_LOG ||
464 iosizelog < XFS_MIN_IO_LOG) {
Dave Chinner4f107002011-03-07 10:00:35 +1100465 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100466 iosizelog, XFS_MIN_IO_LOG,
467 XFS_MAX_IO_LOG);
468 return XFS_ERROR(EINVAL);
469 }
470
471 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
472 mp->m_readio_log = iosizelog;
473 mp->m_writeio_log = iosizelog;
474 }
475
David Chinnera67d7c52007-11-23 16:29:32 +1100476 return 0;
477}
478
479struct proc_xfs_info {
480 int flag;
481 char *str;
482};
483
484STATIC int
485xfs_showargs(
486 struct xfs_mount *mp,
487 struct seq_file *m)
488{
489 static struct proc_xfs_info xfs_info_set[] = {
490 /* the few simple ones we can get from the mount struct */
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100491 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
David Chinnera67d7c52007-11-23 16:29:32 +1100492 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
David Chinnera67d7c52007-11-23 16:29:32 +1100493 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
494 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
495 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
496 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
David Chinnera67d7c52007-11-23 16:29:32 +1100497 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
498 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
David Chinnera67d7c52007-11-23 16:29:32 +1100499 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
Christoph Hellwige84661a2011-05-20 13:45:32 +0000500 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
Carlos Maiolino08bf5402012-09-20 10:32:37 -0300501 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
David Chinnera67d7c52007-11-23 16:29:32 +1100502 { 0, NULL }
503 };
504 static struct proc_xfs_info xfs_info_unset[] = {
505 /* the few simple ones we can get from the mount struct */
David Chinnera67d7c52007-11-23 16:29:32 +1100506 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
507 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
508 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
509 { 0, NULL }
510 };
511 struct proc_xfs_info *xfs_infop;
512
513 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
514 if (mp->m_flags & xfs_infop->flag)
515 seq_puts(m, xfs_infop->str);
516 }
517 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
518 if (!(mp->m_flags & xfs_infop->flag))
519 seq_puts(m, xfs_infop->str);
520 }
521
522 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
523 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
524 (int)(1 << mp->m_writeio_log) >> 10);
525
526 if (mp->m_logbufs > 0)
527 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
528 if (mp->m_logbsize > 0)
529 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
530
531 if (mp->m_logname)
532 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
533 if (mp->m_rtname)
534 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
535
536 if (mp->m_dalign > 0)
537 seq_printf(m, "," MNTOPT_SUNIT "=%d",
538 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
539 if (mp->m_swidth > 0)
540 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
541 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
542
543 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
544 seq_puts(m, "," MNTOPT_USRQUOTA);
545 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
546 seq_puts(m, "," MNTOPT_UQUOTANOENF);
547
Alex Elder988abe42009-09-02 17:02:24 -0500548 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500549 if (mp->m_qflags & XFS_PQUOTA_ENFD)
Alex Elder988abe42009-09-02 17:02:24 -0500550 seq_puts(m, "," MNTOPT_PRJQUOTA);
551 else
552 seq_puts(m, "," MNTOPT_PQUOTANOENF);
Chandra Seetharamand892d582013-07-19 17:36:02 -0500553 }
554 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
Chandra Seetharaman83e782e2013-06-27 17:25:10 -0500555 if (mp->m_qflags & XFS_GQUOTA_ENFD)
Alex Elder988abe42009-09-02 17:02:24 -0500556 seq_puts(m, "," MNTOPT_GRPQUOTA);
557 else
558 seq_puts(m, "," MNTOPT_GQUOTANOENF);
559 }
David Chinnera67d7c52007-11-23 16:29:32 +1100560
561 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
562 seq_puts(m, "," MNTOPT_NOQUOTA);
563
564 return 0;
565}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566__uint64_t
567xfs_max_file_offset(
568 unsigned int blockshift)
569{
570 unsigned int pagefactor = 1;
571 unsigned int bitshift = BITS_PER_LONG - 1;
572
573 /* Figure out maximum filesize, on Linux this can depend on
574 * the filesystem blocksize (on 32 bit platforms).
Christoph Hellwigebdec242010-10-06 10:47:23 +0200575 * __block_write_begin does this in an [unsigned] long...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 * page->index << (PAGE_CACHE_SHIFT - bbits)
577 * So, for page sized blocks (4K on 32 bit platforms),
578 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
579 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
580 * but for smaller blocksizes it is less (bbits = log2 bsize).
581 * Note1: get_block_t takes a long (implicit cast from above)
582 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
583 * can optionally convert the [unsigned] long from above into
584 * an [unsigned] long long.
585 */
586
587#if BITS_PER_LONG == 32
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +0200588# if defined(CONFIG_LBDAF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 ASSERT(sizeof(sector_t) == 8);
590 pagefactor = PAGE_CACHE_SIZE;
591 bitshift = BITS_PER_LONG;
592# else
593 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
594# endif
595#endif
596
597 return (((__uint64_t)pagefactor) << bitshift) - 1;
598}
599
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300600xfs_agnumber_t
601xfs_set_inode32(struct xfs_mount *mp)
602{
603 xfs_agnumber_t index = 0;
Carlos Maiolino4056c1d2012-09-20 10:32:40 -0300604 xfs_agnumber_t maxagi = 0;
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300605 xfs_sb_t *sbp = &mp->m_sb;
606 xfs_agnumber_t max_metadata;
607 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0);
608 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino);
609 xfs_perag_t *pag;
610
611 /* Calculate how much should be reserved for inodes to meet
612 * the max inode percentage.
613 */
614 if (mp->m_maxicount) {
615 __uint64_t icount;
616
617 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
618 do_div(icount, 100);
619 icount += sbp->sb_agblocks - 1;
620 do_div(icount, sbp->sb_agblocks);
621 max_metadata = icount;
622 } else {
623 max_metadata = sbp->sb_agcount;
624 }
625
626 for (index = 0; index < sbp->sb_agcount; index++) {
627 ino = XFS_AGINO_TO_INO(mp, index, agino);
Carlos Maiolino4056c1d2012-09-20 10:32:40 -0300628
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300629 if (ino > XFS_MAXINUMBER_32) {
Carlos Maiolino4056c1d2012-09-20 10:32:40 -0300630 pag = xfs_perag_get(mp, index);
631 pag->pagi_inodeok = 0;
632 pag->pagf_metadata = 0;
633 xfs_perag_put(pag);
634 continue;
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300635 }
636
637 pag = xfs_perag_get(mp, index);
638 pag->pagi_inodeok = 1;
Carlos Maiolino4056c1d2012-09-20 10:32:40 -0300639 maxagi++;
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300640 if (index < max_metadata)
641 pag->pagf_metadata = 1;
642 xfs_perag_put(pag);
643 }
Carlos Maiolino4056c1d2012-09-20 10:32:40 -0300644 mp->m_flags |= (XFS_MOUNT_32BITINODES |
645 XFS_MOUNT_SMALL_INUMS);
646
647 return maxagi;
Carlos Maiolino2d2194f2012-09-20 10:32:38 -0300648}
649
650xfs_agnumber_t
651xfs_set_inode64(struct xfs_mount *mp)
652{
653 xfs_agnumber_t index = 0;
654
655 for (index = 0; index < mp->m_sb.sb_agcount; index++) {
656 struct xfs_perag *pag;
657
658 pag = xfs_perag_get(mp, index);
659 pag->pagi_inodeok = 1;
660 pag->pagf_metadata = 0;
661 xfs_perag_put(pag);
662 }
663
664 /* There is no need for lock protection on m_flags,
665 * the rw_semaphore of the VFS superblock is locked
666 * during mount/umount/remount operations, so this is
667 * enough to avoid concurency on the m_flags field
668 */
669 mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
670 XFS_MOUNT_SMALL_INUMS);
671 return index;
672}
673
Hannes Eder3180e662009-03-04 19:34:10 +0100674STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675xfs_blkdev_get(
676 xfs_mount_t *mp,
677 const char *name,
678 struct block_device **bdevp)
679{
680 int error = 0;
681
Tejun Heod4d77622010-11-13 11:55:18 +0100682 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
683 mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 if (IS_ERR(*bdevp)) {
685 error = PTR_ERR(*bdevp);
Dave Chinner4f107002011-03-07 10:00:35 +1100686 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 }
688
689 return -error;
690}
691
Hannes Eder3180e662009-03-04 19:34:10 +0100692STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693xfs_blkdev_put(
694 struct block_device *bdev)
695{
696 if (bdev)
Tejun Heoe525fd82010-11-13 11:55:17 +0100697 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698}
699
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100700void
701xfs_blkdev_issue_flush(
702 xfs_buftarg_t *buftarg)
703{
Shaohua Li7582df52012-04-24 21:23:46 +0800704 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100705}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000707STATIC void
708xfs_close_devices(
709 struct xfs_mount *mp)
710{
711 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000712 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500713 xfs_free_buftarg(mp, mp->m_logdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000714 xfs_blkdev_put(logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000715 }
716 if (mp->m_rtdev_targp) {
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000717 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
Christoph Hellwigb7963132009-03-03 14:48:37 -0500718 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Lachlan McIlroyc032bfc2008-07-18 17:13:12 +1000719 xfs_blkdev_put(rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000720 }
Christoph Hellwigb7963132009-03-03 14:48:37 -0500721 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000722}
723
724/*
725 * The file system configurations are:
726 * (1) device (partition) with data and internal log
727 * (2) logical volume with data and log subvolumes.
728 * (3) logical volume with data, log, and realtime subvolumes.
729 *
730 * We only have to handle opening the log and realtime volumes here if
731 * they are present. The data subvolume has already been opened by
732 * get_sb_bdev() and is stored in sb->s_bdev.
733 */
734STATIC int
735xfs_open_devices(
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100736 struct xfs_mount *mp)
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000737{
738 struct block_device *ddev = mp->m_super->s_bdev;
739 struct block_device *logdev = NULL, *rtdev = NULL;
740 int error;
741
742 /*
743 * Open real time and log devices - order is important.
744 */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100745 if (mp->m_logname) {
746 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000747 if (error)
748 goto out;
749 }
750
Christoph Hellwig9d565ff2008-10-30 17:53:24 +1100751 if (mp->m_rtname) {
752 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000753 if (error)
754 goto out_close_logdev;
755
756 if (rtdev == ddev || rtdev == logdev) {
Dave Chinner4f107002011-03-07 10:00:35 +1100757 xfs_warn(mp,
758 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000759 error = EINVAL;
760 goto out_close_rtdev;
761 }
762 }
763
764 /*
765 * Setup xfs_mount buffer target pointers
766 */
767 error = ENOMEM;
Dave Chinnerebad8612010-09-22 10:47:20 +1000768 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000769 if (!mp->m_ddev_targp)
770 goto out_close_rtdev;
771
772 if (rtdev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000773 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
774 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000775 if (!mp->m_rtdev_targp)
776 goto out_free_ddev_targ;
777 }
778
779 if (logdev && logdev != ddev) {
Dave Chinnerebad8612010-09-22 10:47:20 +1000780 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
781 mp->m_fsname);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000782 if (!mp->m_logdev_targp)
783 goto out_free_rtdev_targ;
784 } else {
785 mp->m_logdev_targp = mp->m_ddev_targp;
786 }
787
788 return 0;
789
790 out_free_rtdev_targ:
791 if (mp->m_rtdev_targp)
Christoph Hellwigb7963132009-03-03 14:48:37 -0500792 xfs_free_buftarg(mp, mp->m_rtdev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000793 out_free_ddev_targ:
Christoph Hellwigb7963132009-03-03 14:48:37 -0500794 xfs_free_buftarg(mp, mp->m_ddev_targp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000795 out_close_rtdev:
796 if (rtdev)
797 xfs_blkdev_put(rtdev);
798 out_close_logdev:
799 if (logdev && logdev != ddev)
800 xfs_blkdev_put(logdev);
801 out:
802 return error;
803}
804
Christoph Hellwige34b5622008-05-20 15:10:36 +1000805/*
806 * Setup xfs_mount buffer target pointers based on superblock
807 */
808STATIC int
809xfs_setup_devices(
810 struct xfs_mount *mp)
811{
812 int error;
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000813
Christoph Hellwige34b5622008-05-20 15:10:36 +1000814 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
815 mp->m_sb.sb_sectsize);
816 if (error)
817 return error;
818
819 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
820 unsigned int log_sector_size = BBSIZE;
821
822 if (xfs_sb_version_hassector(&mp->m_sb))
823 log_sector_size = mp->m_sb.sb_logsectsize;
824 error = xfs_setsize_buftarg(mp->m_logdev_targp,
825 mp->m_sb.sb_blocksize,
826 log_sector_size);
827 if (error)
828 return error;
829 }
830 if (mp->m_rtdev_targp) {
831 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
832 mp->m_sb.sb_blocksize,
833 mp->m_sb.sb_sectsize);
834 if (error)
835 return error;
836 }
837
838 return 0;
839}
Christoph Hellwig19f354d2008-05-20 11:31:13 +1000840
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000841STATIC int
842xfs_init_mount_workqueues(
843 struct xfs_mount *mp)
844{
845 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
846 WQ_MEM_RECLAIM, 0, mp->m_fsname);
847 if (!mp->m_data_workqueue)
848 goto out;
849
850 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
851 WQ_MEM_RECLAIM, 0, mp->m_fsname);
852 if (!mp->m_unwritten_workqueue)
853 goto out_destroy_data_iodone_queue;
854
Dave Chinner4c2d5422012-04-23 17:54:32 +1000855 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
856 WQ_MEM_RECLAIM, 0, mp->m_fsname);
857 if (!mp->m_cil_workqueue)
858 goto out_destroy_unwritten;
Dave Chinner58896082012-10-08 21:56:05 +1100859
860 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
Tejun Heo7a378c92013-07-30 08:40:26 -0400861 0, 0, mp->m_fsname);
Dave Chinner58896082012-10-08 21:56:05 +1100862 if (!mp->m_reclaim_workqueue)
863 goto out_destroy_cil;
864
865 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
Tejun Heo7a378c92013-07-30 08:40:26 -0400866 0, 0, mp->m_fsname);
Dave Chinner58896082012-10-08 21:56:05 +1100867 if (!mp->m_log_workqueue)
868 goto out_destroy_reclaim;
869
Brian Foster579b62f2012-11-06 09:50:47 -0500870 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
Tejun Heo7a378c92013-07-30 08:40:26 -0400871 0, 0, mp->m_fsname);
Brian Foster579b62f2012-11-06 09:50:47 -0500872 if (!mp->m_eofblocks_workqueue)
873 goto out_destroy_log;
874
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000875 return 0;
876
Brian Foster579b62f2012-11-06 09:50:47 -0500877out_destroy_log:
878 destroy_workqueue(mp->m_log_workqueue);
Dave Chinner58896082012-10-08 21:56:05 +1100879out_destroy_reclaim:
880 destroy_workqueue(mp->m_reclaim_workqueue);
881out_destroy_cil:
882 destroy_workqueue(mp->m_cil_workqueue);
Dave Chinner4c2d5422012-04-23 17:54:32 +1000883out_destroy_unwritten:
884 destroy_workqueue(mp->m_unwritten_workqueue);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000885out_destroy_data_iodone_queue:
886 destroy_workqueue(mp->m_data_workqueue);
887out:
888 return -ENOMEM;
889}
890
891STATIC void
892xfs_destroy_mount_workqueues(
893 struct xfs_mount *mp)
894{
Brian Foster579b62f2012-11-06 09:50:47 -0500895 destroy_workqueue(mp->m_eofblocks_workqueue);
Dave Chinner58896082012-10-08 21:56:05 +1100896 destroy_workqueue(mp->m_log_workqueue);
897 destroy_workqueue(mp->m_reclaim_workqueue);
Dave Chinner4c2d5422012-04-23 17:54:32 +1000898 destroy_workqueue(mp->m_cil_workqueue);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000899 destroy_workqueue(mp->m_data_workqueue);
900 destroy_workqueue(mp->m_unwritten_workqueue);
901}
902
Dave Chinner9aa05002012-10-08 21:56:04 +1100903/*
904 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
905 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
906 * for IO to complete so that we effectively throttle multiple callers to the
907 * rate at which IO is completing.
908 */
909void
910xfs_flush_inodes(
911 struct xfs_mount *mp)
912{
913 struct super_block *sb = mp->m_super;
914
915 if (down_read_trylock(&sb->s_umount)) {
Jan Kara0dc83bd2014-02-21 11:19:04 +0100916 sync_inodes_sb(sb);
Dave Chinner9aa05002012-10-08 21:56:04 +1100917 up_read(&sb->s_umount);
918 }
919}
920
David Chinnerbf904242008-10-30 17:36:14 +1100921/* Catch misguided souls that try to use this interface on XFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922STATIC struct inode *
Nathan Scotta50cd262006-03-14 14:06:18 +1100923xfs_fs_alloc_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 struct super_block *sb)
925{
David Chinnerbf904242008-10-30 17:36:14 +1100926 BUG();
Lachlan McIlroy493dca62008-10-30 17:36:52 +1100927 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928}
929
David Chinnerbf904242008-10-30 17:36:14 +1100930/*
David Chinner99fa8cb2008-10-30 17:36:40 +1100931 * Now that the generic code is guaranteed not to be accessing
932 * the linux inode, we can reclaim the inode.
David Chinnerbf904242008-10-30 17:36:14 +1100933 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +1100935xfs_fs_destroy_inode(
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000936 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000938 struct xfs_inode *ip = XFS_I(inode);
939
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000940 trace_xfs_destroy_inode(ip);
David Chinner99fa8cb2008-10-30 17:36:40 +1100941
942 XFS_STATS_INC(vn_reclaim);
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000943
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000944 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
945
946 /*
947 * We should never get here with one of the reclaim flags already set.
948 */
949 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
950 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
951
952 /*
Dave Chinner57817c62010-01-10 23:51:47 +0000953 * We always use background reclaim here because even if the
954 * inode is clean, it still may be under IO and hence we have
955 * to take the flush lock. The background reclaim path handles
956 * this more efficiently than we can here, so simply let background
957 * reclaim tear down all inodes.
Christoph Hellwig848ce8f2009-09-29 13:48:56 +0000958 */
Dave Chinner57817c62010-01-10 23:51:47 +0000959 xfs_inode_set_reclaim_tag(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960}
961
David Chinner07c8f672008-10-30 16:11:59 +1100962/*
963 * Slab object creation initialisation for the XFS inode.
964 * This covers only the idempotent fields in the XFS inode;
965 * all other fields need to be initialised on allocation
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400966 * from the slab. This avoids the need to repeatedly initialise
David Chinner07c8f672008-10-30 16:11:59 +1100967 * fields in the xfs inode that left in the initialise state
968 * when freeing the inode.
969 */
David Chinnerbf904242008-10-30 17:36:14 +1100970STATIC void
971xfs_fs_inode_init_once(
David Chinner07c8f672008-10-30 16:11:59 +1100972 void *inode)
973{
974 struct xfs_inode *ip = inode;
975
976 memset(ip, 0, sizeof(struct xfs_inode));
David Chinnerbf904242008-10-30 17:36:14 +1100977
978 /* vfs inode */
979 inode_init_once(VFS_I(ip));
980
981 /* xfs inode */
David Chinner07c8f672008-10-30 16:11:59 +1100982 atomic_set(&ip->i_pincount, 0);
983 spin_lock_init(&ip->i_flags_lock);
David Chinner07c8f672008-10-30 16:11:59 +1100984
985 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
986 "xfsino", ip->i_ino);
David Chinner07c8f672008-10-30 16:11:59 +1100987}
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989STATIC void
Al Virob57922d2010-06-07 14:34:48 -0400990xfs_fs_evict_inode(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 struct inode *inode)
992{
Christoph Hellwig1543d792007-08-29 11:46:47 +1000993 xfs_inode_t *ip = XFS_I(inode);
Christoph Hellwig56d433e2005-09-05 08:23:54 +1000994
Christoph Hellwig4f59af72012-07-04 11:13:33 -0400995 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
996
Al Virob57922d2010-06-07 14:34:48 -0400997 trace_xfs_evict_inode(ip);
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000998
Al Virob57922d2010-06-07 14:34:48 -0400999 truncate_inode_pages(&inode->i_data, 0);
Jan Karadbd57682012-05-03 14:48:02 +02001000 clear_inode(inode);
David Chinner99fa8cb2008-10-30 17:36:40 +11001001 XFS_STATS_INC(vn_rele);
1002 XFS_STATS_INC(vn_remove);
1003 XFS_STATS_DEC(vn_active);
Christoph Hellwig56d433e2005-09-05 08:23:54 +10001004
David Chinner99fa8cb2008-10-30 17:36:40 +11001005 xfs_inactive(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006}
1007
Dave Chinner5132ba82012-03-22 05:15:10 +00001008/*
1009 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1010 * serialised against cache hits here via the inode->i_lock and igrab() in
1011 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1012 * racing with us, and it avoids needing to grab a spinlock here for every inode
1013 * we drop the final reference on.
1014 */
1015STATIC int
1016xfs_fs_drop_inode(
1017 struct inode *inode)
1018{
1019 struct xfs_inode *ip = XFS_I(inode);
1020
1021 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1022}
1023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024STATIC void
Christoph Hellwiga7381592008-08-13 16:04:05 +10001025xfs_free_fsname(
1026 struct xfs_mount *mp)
1027{
1028 kfree(mp->m_fsname);
1029 kfree(mp->m_rtname);
1030 kfree(mp->m_logname);
1031}
1032
1033STATIC void
Nathan Scotta50cd262006-03-14 14:06:18 +11001034xfs_fs_put_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 struct super_block *sb)
1036{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001037 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
Dave Chinner7e185302012-10-08 21:56:00 +11001039 xfs_filestream_unmount(mp);
1040 xfs_unmountfs(mp);
1041
Christoph Hellwig62033002008-08-13 16:50:21 +10001042 xfs_freesb(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001043 xfs_icsb_destroy_counters(mp);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001044 xfs_destroy_mount_workqueues(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001045 xfs_close_devices(mp);
Christoph Hellwiga7381592008-08-13 16:04:05 +10001046 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001047 kfree(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050STATIC int
Christoph Hellwig69961a22009-10-06 20:29:28 +00001051xfs_fs_sync_fs(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 struct super_block *sb,
1053 int wait)
1054{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001055 struct xfs_mount *mp = XFS_M(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001057 /*
Christoph Hellwig34625c62011-12-06 21:58:12 +00001058 * Doing anything during the async pass would be counterproductive.
Lachlan McIlroye893bff2007-10-12 11:13:35 +10001059 */
Christoph Hellwig34625c62011-12-06 21:58:12 +00001060 if (!wait)
Christoph Hellwig69961a22009-10-06 20:29:28 +00001061 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Dave Chinner34061f52012-10-08 21:56:06 +11001063 xfs_log_force(mp, XFS_LOG_SYNC);
Christoph Hellwig69961a22009-10-06 20:29:28 +00001064 if (laptop_mode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 /*
1066 * The disk must be active because we're syncing.
Dave Chinnerf661f1e2012-10-08 21:56:02 +11001067 * We schedule log work now (now that the disk is
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 * active) instead of later (when it might not be).
1069 */
Dave Chinnerf661f1e2012-10-08 21:56:02 +11001070 flush_delayed_work(&mp->m_log->l_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 }
1072
Christoph Hellwig69961a22009-10-06 20:29:28 +00001073 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074}
1075
1076STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001077xfs_fs_statfs(
David Howells726c3342006-06-23 02:02:58 -07001078 struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 struct kstatfs *statp)
1080{
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001081 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1082 xfs_sb_t *sbp = &mp->m_sb;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001083 struct xfs_inode *ip = XFS_I(dentry->d_inode);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001084 __uint64_t fakeinos, id;
1085 xfs_extlen_t lsize;
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001086 __int64_t ffree;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001087
1088 statp->f_type = XFS_SB_MAGIC;
1089 statp->f_namelen = MAXNAMELEN - 1;
1090
1091 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1092 statp->f_fsid.val[0] = (u32)id;
1093 statp->f_fsid.val[1] = (u32)(id >> 32);
1094
Christoph Hellwigd4d90b52008-04-22 17:34:37 +10001095 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001096
1097 spin_lock(&mp->m_sb_lock);
1098 statp->f_bsize = sbp->sb_blocksize;
1099 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1100 statp->f_blocks = sbp->sb_dblocks - lsize;
1101 statp->f_bfree = statp->f_bavail =
1102 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1103 fakeinos = statp->f_bfree << sbp->sb_inopblog;
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001104 statp->f_files =
1105 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1106 if (mp->m_maxicount)
Christoph Hellwiga19d9f82009-03-29 09:51:08 +02001107 statp->f_files = min_t(typeof(statp->f_files),
1108 statp->f_files,
1109 mp->m_maxicount);
Stuart Brodsky2fe33662010-08-24 11:46:05 +10001110
1111 /* make sure statp->f_ffree does not underflow */
1112 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1113 statp->f_ffree = max_t(__int64_t, ffree, 0);
1114
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001115 spin_unlock(&mp->m_sb_lock);
1116
Jie Liuda5bf952012-04-12 03:59:57 +00001117 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
Chandra Seetharaman83e782e2013-06-27 17:25:10 -05001118 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1119 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
Christoph Hellwig7d095252009-06-08 15:33:32 +02001120 xfs_qm_statvfs(ip, statp);
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001121 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122}
1123
Eric Sandeend5db0f92010-02-05 22:59:53 +00001124STATIC void
1125xfs_save_resvblks(struct xfs_mount *mp)
1126{
1127 __uint64_t resblks = 0;
1128
1129 mp->m_resblks_save = mp->m_resblks;
1130 xfs_reserve_blocks(mp, &resblks, NULL);
1131}
1132
1133STATIC void
1134xfs_restore_resvblks(struct xfs_mount *mp)
1135{
1136 __uint64_t resblks;
1137
1138 if (mp->m_resblks_save) {
1139 resblks = mp->m_resblks_save;
1140 mp->m_resblks_save = 0;
1141 } else
1142 resblks = xfs_default_resblks(mp);
1143
1144 xfs_reserve_blocks(mp, &resblks, NULL);
1145}
1146
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001147/*
1148 * Trigger writeback of all the dirty metadata in the file system.
1149 *
1150 * This ensures that the metadata is written to their location on disk rather
1151 * than just existing in transactions in the log. This means after a quiesce
Dave Chinnerc75921a2012-10-08 21:56:08 +11001152 * there is no log replay required to write the inodes to disk - this is the
1153 * primary difference between a sync and a quiesce.
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001154 *
Dave Chinnerc75921a2012-10-08 21:56:08 +11001155 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1156 * it is started again when appropriate.
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001157 */
Dave Chinner632b89e2013-10-29 22:11:58 +11001158static void
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001159xfs_quiesce_attr(
1160 struct xfs_mount *mp)
1161{
1162 int error = 0;
1163
1164 /* wait for all modifications to complete */
1165 while (atomic_read(&mp->m_active_trans) > 0)
1166 delay(100);
1167
1168 /* force the log to unpin objects from the now complete transactions */
1169 xfs_log_force(mp, XFS_LOG_SYNC);
1170
1171 /* reclaim inodes to do any IO before the freeze completes */
1172 xfs_reclaim_inodes(mp, 0);
1173 xfs_reclaim_inodes(mp, SYNC_WAIT);
1174
Dave Chinnerc75921a2012-10-08 21:56:08 +11001175 /* Push the superblock and write an unmount record */
1176 error = xfs_log_sbcount(mp);
1177 if (error)
1178 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1179 "Frozen image may not be consistent.");
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001180 /*
1181 * Just warn here till VFS can correctly support
1182 * read-only remount without racing.
1183 */
1184 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1185
Dave Chinnerc75921a2012-10-08 21:56:08 +11001186 xfs_log_quiesce(mp);
Dave Chinnerc7eea6f2012-10-08 21:56:07 +11001187}
1188
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001190xfs_fs_remount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 struct super_block *sb,
1192 int *flags,
1193 char *options)
1194{
Christoph Hellwig745f6912007-08-30 17:20:39 +10001195 struct xfs_mount *mp = XFS_M(sb);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001196 substring_t args[MAX_OPT_ARGS];
1197 char *p;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001198 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001200 while ((p = strsep(&options, ",")) != NULL) {
1201 int token;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001202
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001203 if (!*p)
1204 continue;
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001205
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001206 token = match_token(p, tokens, args);
1207 switch (token) {
1208 case Opt_barrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001209 mp->m_flags |= XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001210 break;
1211 case Opt_nobarrier:
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001212 mp->m_flags &= ~XFS_MOUNT_BARRIER;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001213 break;
Carlos Maiolinoc3a58fe2012-08-17 18:19:38 -03001214 case Opt_inode64:
Carlos Maiolino4c083722012-09-20 10:32:39 -03001215 mp->m_maxagi = xfs_set_inode64(mp);
Carlos Maiolinoc3a58fe2012-08-17 18:19:38 -03001216 break;
Carlos Maiolino2ea03922012-09-20 10:32:41 -03001217 case Opt_inode32:
1218 mp->m_maxagi = xfs_set_inode32(mp);
1219 break;
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001220 default:
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001221 /*
1222 * Logically we would return an error here to prevent
1223 * users from believing they might have changed
1224 * mount options using remount which can't be changed.
1225 *
1226 * But unfortunately mount(8) adds all options from
1227 * mtab and fstab to the mount arguments in some cases
1228 * so we can't blindly reject options, but have to
1229 * check for each specified option if it actually
1230 * differs from the currently set option and only
1231 * reject it if that's the case.
1232 *
1233 * Until that is implemented we return success for
1234 * every remount request, and silently ignore all
1235 * options that we can't actually change.
1236 */
1237#if 0
Dave Chinner4f107002011-03-07 10:00:35 +11001238 xfs_info(mp,
Eric Sandeen08e96e12013-10-11 20:59:05 -05001239 "mount option \"%s\" not supported for remount", p);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001240 return -EINVAL;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001241#else
Christoph Hellwig6c5e51d2008-10-12 14:30:44 +02001242 break;
Christoph Hellwig6efdf282008-09-17 16:49:33 +10001243#endif
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001244 }
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001245 }
1246
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001247 /* ro -> rw */
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001248 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1249 mp->m_flags &= ~XFS_MOUNT_RDONLY;
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001250
1251 /*
1252 * If this is the first remount to writeable state we
1253 * might have some superblock changes to update.
1254 */
1255 if (mp->m_update_flags) {
1256 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1257 if (error) {
Dave Chinner4f107002011-03-07 10:00:35 +11001258 xfs_warn(mp, "failed to write sb changes");
Christoph Hellwig7884bc82009-01-19 02:04:07 +01001259 return error;
1260 }
1261 mp->m_update_flags = 0;
1262 }
Dave Chinnercbe132a2010-01-26 15:08:49 +11001263
1264 /*
1265 * Fill out the reserve pool if it is empty. Use the stashed
1266 * value if it is non-zero, otherwise go with the default.
1267 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001268 xfs_restore_resvblks(mp);
Dave Chinnerf661f1e2012-10-08 21:56:02 +11001269 xfs_log_work_queue(mp);
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001270 }
1271
1272 /* rw -> ro */
1273 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
Dave Chinnercbe132a2010-01-26 15:08:49 +11001274 /*
Dave Chinner34061f52012-10-08 21:56:06 +11001275 * Before we sync the metadata, we need to free up the reserve
1276 * block pool so that the used block count in the superblock on
1277 * disk is correct at the end of the remount. Stash the current
1278 * reserve pool size so that if we get remounted rw, we can
1279 * return it to the same size.
Dave Chinnercbe132a2010-01-26 15:08:49 +11001280 */
Eric Sandeend5db0f92010-02-05 22:59:53 +00001281 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001282 xfs_quiesce_attr(mp);
Christoph Hellwig48b62a12008-05-20 11:30:39 +10001283 mp->m_flags |= XFS_MOUNT_RDONLY;
1284 }
1285
Christoph Hellwig62a877e2008-07-18 17:12:36 +10001286 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287}
1288
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001289/*
1290 * Second stage of a freeze. The data is already frozen so we only
David Chinner76bf1052008-10-30 17:16:21 +11001291 * need to take care of the metadata. Once that's done write a dummy
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001292 * record to dirty the log in case of a crash while frozen.
1293 */
Takashi Satoc4be0c12009-01-09 16:40:58 -08001294STATIC int
1295xfs_fs_freeze(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 struct super_block *sb)
1297{
Christoph Hellwig9909c4a2007-10-11 18:11:14 +10001298 struct xfs_mount *mp = XFS_M(sb);
1299
Eric Sandeend5db0f92010-02-05 22:59:53 +00001300 xfs_save_resvblks(mp);
David Chinner76bf1052008-10-30 17:16:21 +11001301 xfs_quiesce_attr(mp);
Dave Chinnerc58efdb2011-01-04 04:49:29 +00001302 return -xfs_fs_log_dummy(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303}
1304
1305STATIC int
Eric Sandeend5db0f92010-02-05 22:59:53 +00001306xfs_fs_unfreeze(
1307 struct super_block *sb)
1308{
1309 struct xfs_mount *mp = XFS_M(sb);
1310
1311 xfs_restore_resvblks(mp);
Dave Chinnerf661f1e2012-10-08 21:56:02 +11001312 xfs_log_work_queue(mp);
Eric Sandeend5db0f92010-02-05 22:59:53 +00001313 return 0;
1314}
1315
1316STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001317xfs_fs_show_options(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 struct seq_file *m,
Al Viro34c80b12011-12-08 21:32:45 -05001319 struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320{
Al Viro34c80b12011-12-08 21:32:45 -05001321 return -xfs_showargs(XFS_M(root->d_sb), m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322}
1323
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001324/*
1325 * This function fills in xfs_mount_t fields based on mount args.
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001326 * Note: the superblock _has_ now been read in.
1327 */
1328STATIC int
1329xfs_finish_flags(
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001330 struct xfs_mount *mp)
1331{
1332 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1333
Frederik Schwarzer025dfda2008-10-16 19:02:37 +02001334 /* Fail a mount where the logbuf is smaller than the log stripe */
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001335 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001336 if (mp->m_logbsize <= 0 &&
1337 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001338 mp->m_logbsize = mp->m_sb.sb_logsunit;
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001339 } else if (mp->m_logbsize > 0 &&
1340 mp->m_logbsize < mp->m_sb.sb_logsunit) {
Dave Chinner4f107002011-03-07 10:00:35 +11001341 xfs_warn(mp,
1342 "logbuf size must be greater than or equal to log stripe size");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001343 return XFS_ERROR(EINVAL);
1344 }
1345 } else {
1346 /* Fail a mount if the logbuf is larger than 32K */
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001347 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
Dave Chinner4f107002011-03-07 10:00:35 +11001348 xfs_warn(mp,
1349 "logbuf size for version 1 logs must be 16K or 32K");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001350 return XFS_ERROR(EINVAL);
1351 }
1352 }
1353
1354 /*
Dave Chinnerd3eaace2013-06-05 12:09:09 +10001355 * V5 filesystems always use attr2 format for attributes.
1356 */
1357 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1358 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1359 xfs_warn(mp,
1360"Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1361 MNTOPT_NOATTR2, MNTOPT_ATTR2);
1362 return XFS_ERROR(EINVAL);
1363 }
1364
1365 /*
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001366 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1367 * told by noattr2 to turn it off
1368 */
1369 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001370 !(mp->m_flags & XFS_MOUNT_NOATTR2))
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001371 mp->m_flags |= XFS_MOUNT_ATTR2;
1372
1373 /*
1374 * prohibit r/w mounts of read-only filesystems
1375 */
1376 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
Dave Chinner4f107002011-03-07 10:00:35 +11001377 xfs_warn(mp,
1378 "cannot mount a read-only filesystem as read-write");
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001379 return XFS_ERROR(EROFS);
1380 }
1381
Chandra Seetharamand892d582013-07-19 17:36:02 -05001382 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1383 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1384 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1385 xfs_warn(mp,
1386 "Super block does not support project and group quota together");
1387 return XFS_ERROR(EINVAL);
1388 }
1389
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001390 return 0;
1391}
1392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393STATIC int
Nathan Scotta50cd262006-03-14 14:06:18 +11001394xfs_fs_fill_super(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 struct super_block *sb,
1396 void *data,
1397 int silent)
1398{
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001399 struct inode *root;
Christoph Hellwig745f6912007-08-30 17:20:39 +10001400 struct xfs_mount *mp = NULL;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001401 int flags = 0, error = ENOMEM;
Christoph Hellwigbdd907b2008-05-20 15:10:44 +10001402
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001403 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1404 if (!mp)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001405 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001407 spin_lock_init(&mp->m_sb_lock);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001408 mutex_init(&mp->m_growlock);
1409 atomic_set(&mp->m_active_trans, 0);
Dave Chinner7e185302012-10-08 21:56:00 +11001410 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
Brian Foster579b62f2012-11-06 09:50:47 -05001411 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
Christoph Hellwig74394492007-08-30 17:21:22 +10001412
Christoph Hellwigb267ce92007-08-30 17:21:30 +10001413 mp->m_super = sb;
1414 sb->s_fs_info = mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Christoph Hellwig288699f2010-06-23 18:11:15 +10001416 error = xfs_parseargs(mp, (char *)data);
Christoph Hellwig745f6912007-08-30 17:20:39 +10001417 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001418 goto out_free_fsname;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
1420 sb_min_blocksize(sb, BBSIZE);
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001421 sb->s_xattr = xfs_xattr_handlers;
Nathan Scotta50cd262006-03-14 14:06:18 +11001422 sb->s_export_op = &xfs_export_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001423#ifdef CONFIG_XFS_QUOTA
Nathan Scotta50cd262006-03-14 14:06:18 +11001424 sb->s_qcop = &xfs_quotactl_operations;
Christoph Hellwigfcafb712009-02-09 08:47:34 +01001425#endif
Nathan Scotta50cd262006-03-14 14:06:18 +11001426 sb->s_op = &xfs_super_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001428 if (silent)
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001429 flags |= XFS_MFSI_QUIET;
1430
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001431 error = xfs_open_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001432 if (error)
Christoph Hellwig288699f2010-06-23 18:11:15 +10001433 goto out_free_fsname;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001434
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001435 error = xfs_init_mount_workqueues(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001436 if (error)
1437 goto out_close_devices;
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001438
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001439 error = xfs_icsb_init_counters(mp);
1440 if (error)
1441 goto out_destroy_workqueues;
1442
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001443 error = xfs_readsb(mp, flags);
1444 if (error)
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001445 goto out_destroy_counters;
1446
1447 error = xfs_finish_flags(mp);
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001448 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001449 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001450
Christoph Hellwige34b5622008-05-20 15:10:36 +10001451 error = xfs_setup_devices(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001452 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001453 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001454
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001455 error = xfs_filestream_mount(mp);
1456 if (error)
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001457 goto out_free_sb;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001458
Dave Chinner704b2902011-03-26 09:14:57 +11001459 /*
1460 * we must configure the block size in the superblock before we run the
1461 * full mount process as the mount process can lookup and cache inodes.
Dave Chinner704b2902011-03-26 09:14:57 +11001462 */
Christoph Hellwig4ca488e2007-10-11 18:09:40 +10001463 sb->s_magic = XFS_SB_MAGIC;
1464 sb->s_blocksize = mp->m_sb.sb_blocksize;
1465 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
Al Viro8de52772012-02-06 12:45:27 -05001467 sb->s_max_links = XFS_MAXLINK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 sb->s_time_gran = 1;
1469 set_posix_acl_flag(sb);
1470
Dave Chinnerdc037ad2013-06-27 16:04:59 +10001471 /* version 5 superblocks support inode version counters. */
1472 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1473 sb->s_flags |= MS_I_VERSION;
1474
Dave Chinner8a00ebe2012-04-13 12:10:44 +00001475 error = xfs_mountfs(mp);
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001476 if (error)
Dave Chinner7e185302012-10-08 21:56:00 +11001477 goto out_filestream_unmount;
Dave Chinner704b2902011-03-26 09:14:57 +11001478
David Chinner01651642008-08-13 15:45:15 +10001479 root = igrab(VFS_I(mp->m_rootip));
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001480 if (!root) {
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001481 error = ENOENT;
Dave Chinner8a00ebe2012-04-13 12:10:44 +00001482 goto out_unmount;
Christoph Hellwigcbc89dc2008-02-05 12:14:01 +11001483 }
Al Viro48fde702012-01-08 22:15:13 -05001484 sb->s_root = d_make_root(root);
Christoph Hellwigf3dcc132008-03-27 18:00:54 +11001485 if (!sb->s_root) {
1486 error = ENOMEM;
Dave Chinner8a00ebe2012-04-13 12:10:44 +00001487 goto out_unmount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
Christoph Hellwig74394492007-08-30 17:21:22 +10001489
Dave Chinner7e185302012-10-08 21:56:00 +11001490 return 0;
1491
1492 out_filestream_unmount:
Christoph Hellwig120226c2008-05-20 15:11:11 +10001493 xfs_filestream_unmount(mp);
Christoph Hellwigeffa2ed2008-05-20 15:11:05 +10001494 out_free_sb:
1495 xfs_freesb(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001496 out_destroy_counters:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001497 xfs_icsb_destroy_counters(mp);
Christoph Hellwigaa6bf012012-02-29 09:53:48 +00001498out_destroy_workqueues:
1499 xfs_destroy_mount_workqueues(mp);
Christoph Hellwig61ba35d2010-09-30 02:25:54 +00001500 out_close_devices:
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001501 xfs_close_devices(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001502 out_free_fsname:
1503 xfs_free_fsname(mp);
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001504 kfree(mp);
Christoph Hellwig9d565ff2008-10-30 17:53:24 +11001505 out:
Christoph Hellwigc962fb72008-05-20 15:10:52 +10001506 return -error;
Christoph Hellwigf8f15e42008-05-20 11:30:59 +10001507
Christoph Hellwig2bcf6e92011-07-13 13:43:48 +02001508 out_unmount:
Christoph Hellwige48ad312008-05-20 11:30:52 +10001509 xfs_filestream_unmount(mp);
Christoph Hellwig19f354d2008-05-20 11:31:13 +10001510 xfs_unmountfs(mp);
Christoph Hellwig62033002008-08-13 16:50:21 +10001511 goto out_free_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512}
1513
Al Viro152a0832010-07-25 00:46:55 +04001514STATIC struct dentry *
1515xfs_fs_mount(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 struct file_system_type *fs_type,
1517 int flags,
1518 const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04001519 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520{
Al Viro152a0832010-07-25 00:46:55 +04001521 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522}
1523
Dave Chinner0a234c62013-08-28 10:17:57 +10001524static long
Dave Chinner8daaa832011-07-08 14:14:46 +10001525xfs_fs_nr_cached_objects(
Dave Chinner9b17c622013-08-28 10:18:05 +10001526 struct super_block *sb,
1527 int nid)
Dave Chinner8daaa832011-07-08 14:14:46 +10001528{
1529 return xfs_reclaim_inodes_count(XFS_M(sb));
1530}
1531
Dave Chinner0a234c62013-08-28 10:17:57 +10001532static long
Dave Chinner8daaa832011-07-08 14:14:46 +10001533xfs_fs_free_cached_objects(
1534 struct super_block *sb,
Dave Chinner9b17c622013-08-28 10:18:05 +10001535 long nr_to_scan,
1536 int nid)
Dave Chinner8daaa832011-07-08 14:14:46 +10001537{
Dave Chinner0a234c62013-08-28 10:17:57 +10001538 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
Dave Chinner8daaa832011-07-08 14:14:46 +10001539}
1540
Alexey Dobriyanb87221d2009-09-21 17:01:09 -07001541static const struct super_operations xfs_super_operations = {
Nathan Scotta50cd262006-03-14 14:06:18 +11001542 .alloc_inode = xfs_fs_alloc_inode,
1543 .destroy_inode = xfs_fs_destroy_inode,
Al Virob57922d2010-06-07 14:34:48 -04001544 .evict_inode = xfs_fs_evict_inode,
Dave Chinner5132ba82012-03-22 05:15:10 +00001545 .drop_inode = xfs_fs_drop_inode,
Nathan Scotta50cd262006-03-14 14:06:18 +11001546 .put_super = xfs_fs_put_super,
Christoph Hellwig69961a22009-10-06 20:29:28 +00001547 .sync_fs = xfs_fs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -08001548 .freeze_fs = xfs_fs_freeze,
Eric Sandeend5db0f92010-02-05 22:59:53 +00001549 .unfreeze_fs = xfs_fs_unfreeze,
Nathan Scotta50cd262006-03-14 14:06:18 +11001550 .statfs = xfs_fs_statfs,
1551 .remount_fs = xfs_fs_remount,
1552 .show_options = xfs_fs_show_options,
Dave Chinner8daaa832011-07-08 14:14:46 +10001553 .nr_cached_objects = xfs_fs_nr_cached_objects,
1554 .free_cached_objects = xfs_fs_free_cached_objects,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555};
1556
Andrew Morton5085b602007-02-20 13:57:47 -08001557static struct file_system_type xfs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 .owner = THIS_MODULE,
1559 .name = "xfs",
Al Viro152a0832010-07-25 00:46:55 +04001560 .mount = xfs_fs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 .kill_sb = kill_block_super,
1562 .fs_flags = FS_REQUIRES_DEV,
1563};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001564MODULE_ALIAS_FS("xfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001566STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001567xfs_init_zones(void)
1568{
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001569
1570 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1571 if (!xfs_ioend_zone)
David Chinnerbf904242008-10-30 17:36:14 +11001572 goto out;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001573
1574 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1575 xfs_ioend_zone);
1576 if (!xfs_ioend_pool)
1577 goto out_destroy_ioend_zone;
1578
1579 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1580 "xfs_log_ticket");
1581 if (!xfs_log_ticket_zone)
1582 goto out_destroy_ioend_pool;
1583
1584 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1585 "xfs_bmap_free_item");
1586 if (!xfs_bmap_free_item_zone)
1587 goto out_destroy_log_ticket_zone;
David Chinnerbf904242008-10-30 17:36:14 +11001588
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001589 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1590 "xfs_btree_cur");
1591 if (!xfs_btree_cur_zone)
1592 goto out_destroy_bmap_free_item_zone;
1593
1594 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1595 "xfs_da_state");
1596 if (!xfs_da_state_zone)
1597 goto out_destroy_btree_cur_zone;
1598
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001599 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1600 if (!xfs_ifork_zone)
Dave Chinner1d9025e2012-06-22 18:50:14 +10001601 goto out_destroy_da_state_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001602
1603 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1604 if (!xfs_trans_zone)
1605 goto out_destroy_ifork_zone;
1606
Christoph Hellwige98c4142010-06-23 18:11:15 +10001607 xfs_log_item_desc_zone =
1608 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1609 "xfs_log_item_desc");
1610 if (!xfs_log_item_desc_zone)
1611 goto out_destroy_trans_zone;
1612
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001613 /*
1614 * The size of the zone allocated buf log item is the maximum
1615 * size possible under XFS. This wastes a little bit of memory,
1616 * but it is much faster.
1617 */
Dave Chinner77c1a082012-06-22 18:50:07 +10001618 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1619 "xfs_buf_item");
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001620 if (!xfs_buf_item_zone)
Christoph Hellwige98c4142010-06-23 18:11:15 +10001621 goto out_destroy_log_item_desc_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001622
1623 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1624 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1625 sizeof(xfs_extent_t))), "xfs_efd_item");
1626 if (!xfs_efd_zone)
1627 goto out_destroy_buf_item_zone;
1628
1629 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1630 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1631 sizeof(xfs_extent_t))), "xfs_efi_item");
1632 if (!xfs_efi_zone)
1633 goto out_destroy_efd_zone;
1634
1635 xfs_inode_zone =
1636 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
David Chinnerbf904242008-10-30 17:36:14 +11001637 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1638 xfs_fs_inode_init_once);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001639 if (!xfs_inode_zone)
1640 goto out_destroy_efi_zone;
1641
1642 xfs_ili_zone =
1643 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1644 KM_ZONE_SPREAD, NULL);
1645 if (!xfs_ili_zone)
1646 goto out_destroy_inode_zone;
Dave Chinner3ebe7d22013-06-27 16:04:53 +10001647 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1648 "xfs_icr");
1649 if (!xfs_icreate_zone)
1650 goto out_destroy_ili_zone;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001651
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001652 return 0;
1653
Dave Chinner3ebe7d22013-06-27 16:04:53 +10001654 out_destroy_ili_zone:
1655 kmem_zone_destroy(xfs_ili_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001656 out_destroy_inode_zone:
1657 kmem_zone_destroy(xfs_inode_zone);
1658 out_destroy_efi_zone:
1659 kmem_zone_destroy(xfs_efi_zone);
1660 out_destroy_efd_zone:
1661 kmem_zone_destroy(xfs_efd_zone);
1662 out_destroy_buf_item_zone:
1663 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001664 out_destroy_log_item_desc_zone:
1665 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001666 out_destroy_trans_zone:
1667 kmem_zone_destroy(xfs_trans_zone);
1668 out_destroy_ifork_zone:
1669 kmem_zone_destroy(xfs_ifork_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001670 out_destroy_da_state_zone:
1671 kmem_zone_destroy(xfs_da_state_zone);
1672 out_destroy_btree_cur_zone:
1673 kmem_zone_destroy(xfs_btree_cur_zone);
1674 out_destroy_bmap_free_item_zone:
1675 kmem_zone_destroy(xfs_bmap_free_item_zone);
1676 out_destroy_log_ticket_zone:
1677 kmem_zone_destroy(xfs_log_ticket_zone);
1678 out_destroy_ioend_pool:
1679 mempool_destroy(xfs_ioend_pool);
1680 out_destroy_ioend_zone:
1681 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001682 out:
1683 return -ENOMEM;
1684}
1685
1686STATIC void
1687xfs_destroy_zones(void)
1688{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001689 /*
1690 * Make sure all delayed rcu free are flushed before we
1691 * destroy caches.
1692 */
1693 rcu_barrier();
Dave Chinner3ebe7d22013-06-27 16:04:53 +10001694 kmem_zone_destroy(xfs_icreate_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001695 kmem_zone_destroy(xfs_ili_zone);
1696 kmem_zone_destroy(xfs_inode_zone);
1697 kmem_zone_destroy(xfs_efi_zone);
1698 kmem_zone_destroy(xfs_efd_zone);
1699 kmem_zone_destroy(xfs_buf_item_zone);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001700 kmem_zone_destroy(xfs_log_item_desc_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001701 kmem_zone_destroy(xfs_trans_zone);
1702 kmem_zone_destroy(xfs_ifork_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001703 kmem_zone_destroy(xfs_da_state_zone);
1704 kmem_zone_destroy(xfs_btree_cur_zone);
1705 kmem_zone_destroy(xfs_bmap_free_item_zone);
1706 kmem_zone_destroy(xfs_log_ticket_zone);
1707 mempool_destroy(xfs_ioend_pool);
1708 kmem_zone_destroy(xfs_ioend_zone);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001709
1710}
1711
1712STATIC int __init
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001713xfs_init_workqueues(void)
1714{
1715 /*
Dave Chinnerc999a222012-03-22 05:15:07 +00001716 * The allocation workqueue can be used in memory reclaim situations
1717 * (writepage path), and parallelism is only limited by the number of
1718 * AGs in all the filesystems mounted. Hence use the default large
1719 * max_active value for this workqueue.
1720 */
1721 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
1722 if (!xfs_alloc_wq)
Dave Chinner58896082012-10-08 21:56:05 +11001723 return -ENOMEM;
Dave Chinnerc999a222012-03-22 05:15:07 +00001724
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001725 return 0;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001726}
1727
Luck, Tony39411f82011-04-11 12:06:12 -07001728STATIC void
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001729xfs_destroy_workqueues(void)
1730{
Dave Chinnerc999a222012-03-22 05:15:07 +00001731 destroy_workqueue(xfs_alloc_wq);
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001732}
1733
1734STATIC int __init
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001735init_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736{
1737 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738
Christoph Hellwig65795912008-11-28 14:23:33 +11001739 printk(KERN_INFO XFS_VERSION_STRING " with "
1740 XFS_BUILD_OPTIONS " enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001742 xfs_dir_startup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743
Nathan Scott87582802006-03-14 13:18:19 +11001744 error = xfs_init_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001745 if (error)
1746 goto out;
1747
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001748 error = xfs_init_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001749 if (error)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001750 goto out_destroy_zones;
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001751
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001752 error = xfs_mru_cache_init();
1753 if (error)
1754 goto out_destroy_wq;
1755
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001756 error = xfs_filestream_init();
1757 if (error)
1758 goto out_mru_cache_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759
Nathan Scottce8e9222006-01-11 15:39:08 +11001760 error = xfs_buf_init();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001761 if (error)
1762 goto out_filestream_uninit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001764 error = xfs_init_procfs();
1765 if (error)
1766 goto out_buf_terminate;
1767
1768 error = xfs_sysctl_register();
1769 if (error)
1770 goto out_cleanup_procfs;
1771
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001772 error = xfs_qm_init();
1773 if (error)
1774 goto out_sysctl_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
1776 error = register_filesystem(&xfs_fs_type);
1777 if (error)
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001778 goto out_qm_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 return 0;
1780
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001781 out_qm_exit:
1782 xfs_qm_exit();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001783 out_sysctl_unregister:
1784 xfs_sysctl_unregister();
1785 out_cleanup_procfs:
1786 xfs_cleanup_procfs();
1787 out_buf_terminate:
Nathan Scottce8e9222006-01-11 15:39:08 +11001788 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001789 out_filestream_uninit:
1790 xfs_filestream_uninit();
1791 out_mru_cache_uninit:
1792 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001793 out_destroy_wq:
1794 xfs_destroy_workqueues();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001795 out_destroy_zones:
Nathan Scott87582802006-03-14 13:18:19 +11001796 xfs_destroy_zones();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001797 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 return error;
1799}
1800
1801STATIC void __exit
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001802exit_xfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803{
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001804 xfs_qm_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 unregister_filesystem(&xfs_fs_type);
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001806 xfs_sysctl_unregister();
1807 xfs_cleanup_procfs();
Nathan Scottce8e9222006-01-11 15:39:08 +11001808 xfs_buf_terminate();
Christoph Hellwig9f8868f2008-07-18 17:11:46 +10001809 xfs_filestream_uninit();
1810 xfs_mru_cache_uninit();
Dave Chinner0bf6a5b2011-04-08 12:45:07 +10001811 xfs_destroy_workqueues();
Nathan Scott87582802006-03-14 13:18:19 +11001812 xfs_destroy_zones();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813}
1814
1815module_init(init_xfs_fs);
1816module_exit(exit_xfs_fs);
1817
1818MODULE_AUTHOR("Silicon Graphics, Inc.");
1819MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1820MODULE_LICENSE("GPL");