1/*
   2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * 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.
  13 *
  14 * 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
  17 */
  18
  19#include "xfs.h"
  20#include "xfs_bit.h"
  21#include "xfs_log.h"
 
 
  22#include "xfs_inum.h"
  23#include "xfs_trans.h"
  24#include "xfs_sb.h"
  25#include "xfs_ag.h"
  26#include "xfs_dir2.h"
  27#include "xfs_alloc.h"
  28#include "xfs_quota.h"
  29#include "xfs_mount.h"
  30#include "xfs_bmap_btree.h"
  31#include "xfs_alloc_btree.h"
  32#include "xfs_ialloc_btree.h"
  33#include "xfs_dinode.h"
  34#include "xfs_inode.h"
  35#include "xfs_btree.h"
  36#include "xfs_ialloc.h"
  37#include "xfs_bmap.h"
  38#include "xfs_rtalloc.h"
  39#include "xfs_error.h"
  40#include "xfs_itable.h"
  41#include "xfs_fsops.h"
  42#include "xfs_attr.h"
  43#include "xfs_buf_item.h"
  44#include "xfs_utils.h"
  45#include "xfs_vnodeops.h"
  46#include "xfs_log_priv.h"
  47#include "xfs_trans_priv.h"
  48#include "xfs_filestream.h"
  49#include "xfs_da_btree.h"
 
  50#include "xfs_extfree_item.h"
  51#include "xfs_mru_cache.h"
  52#include "xfs_inode_item.h"
  53#include "xfs_sync.h"
  54#include "xfs_trace.h"
 
 
 
 
  55
  56#include <linux/namei.h>
  57#include <linux/init.h>
  58#include <linux/slab.h>
  59#include <linux/mount.h>
  60#include <linux/mempool.h>
  61#include <linux/writeback.h>
  62#include <linux/kthread.h>
  63#include <linux/freezer.h>
  64#include <linux/parser.h>
  65
  66static const struct super_operations xfs_super_operations;
  67static kmem_zone_t *xfs_ioend_zone;
  68mempool_t *xfs_ioend_pool;
  69
  70#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 */
  76#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 */
  91#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 */
 112#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 */
 116
 117/*
 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
 127static const match_table_t tokens = {
 128	{Opt_barrier, "barrier"},
 129	{Opt_nobarrier, "nobarrier"},
 
 
 130	{Opt_err, NULL}
 131};
 132
 133
 134STATIC 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
 157/*
 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 */
 164STATIC int
 165xfs_parseargs(
 166	struct xfs_mount	*mp,
 167	char			*options)
 168{
 169	struct super_block	*sb = mp->m_super;
 170	char			*this_char, *value, *eov;
 171	int			dsunit = 0;
 172	int			dswidth = 0;
 173	int			iosize = 0;
 174	__uint8_t		iosizelog = 0;
 175
 176	/*
 177	 * 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	/*
 186	 * Copy binary VFS mount flags we are interested in.
 187	 */
 188	if (sb->s_flags & MS_RDONLY)
 189		mp->m_flags |= XFS_MOUNT_RDONLY;
 190	if (sb->s_flags & MS_DIRSYNC)
 191		mp->m_flags |= XFS_MOUNT_DIRSYNC;
 192	if (sb->s_flags & MS_SYNCHRONOUS)
 193		mp->m_flags |= XFS_MOUNT_WSYNC;
 194
 195	/*
 196	 * Set some default flags that could be cleared by the mount option
 197	 * parsing.
 198	 */
 199	mp->m_flags |= XFS_MOUNT_BARRIER;
 200	mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
 
 201	mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
 202	mp->m_flags |= XFS_MOUNT_DELAYLOG;
 203
 204	/*
 205	 * These can be overridden by the mount option parsing.
 206	 */
 207	mp->m_logbufs = -1;
 208	mp->m_logbsize = -1;
 209
 210	if (!options)
 211		goto done;
 212
 213	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) {
 221				xfs_warn(mp, "%s option requires an argument",
 222					this_char);
 223				return EINVAL;
 224			}
 225			mp->m_logbufs = simple_strtoul(value, &eov, 10);
 
 226		} else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
 227			if (!value || !*value) {
 228				xfs_warn(mp, "%s option requires an argument",
 229					this_char);
 230				return EINVAL;
 231			}
 232			mp->m_logbsize = suffix_strtoul(value, &eov, 10);
 
 233		} else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
 234			if (!value || !*value) {
 235				xfs_warn(mp, "%s option requires an argument",
 236					this_char);
 237				return EINVAL;
 238			}
 239			mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 240			if (!mp->m_logname)
 241				return ENOMEM;
 242		} else if (!strcmp(this_char, MNTOPT_MTPT)) {
 243			xfs_warn(mp, "%s option not allowed on this system",
 244				this_char);
 245			return EINVAL;
 246		} else if (!strcmp(this_char, MNTOPT_RTDEV)) {
 247			if (!value || !*value) {
 248				xfs_warn(mp, "%s option requires an argument",
 249					this_char);
 250				return EINVAL;
 251			}
 252			mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 253			if (!mp->m_rtname)
 254				return ENOMEM;
 255		} else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
 256			if (!value || !*value) {
 257				xfs_warn(mp, "%s option requires an argument",
 258					this_char);
 259				return EINVAL;
 260			}
 261			iosize = simple_strtoul(value, &eov, 10);
 
 262			iosizelog = ffs(iosize) - 1;
 263		} else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
 264			if (!value || !*value) {
 265				xfs_warn(mp, "%s option requires an argument",
 266					this_char);
 267				return EINVAL;
 268			}
 269			iosize = suffix_strtoul(value, &eov, 10);
 
 270			iosizelog = ffs(iosize) - 1;
 271		} 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)) {
 278			mp->m_flags |= XFS_MOUNT_WSYNC;
 279		} else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
 280			mp->m_flags |= XFS_MOUNT_NORECOVERY;
 281		} else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
 282			mp->m_flags |= XFS_MOUNT_NOALIGN;
 283		} else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
 284			mp->m_flags |= XFS_MOUNT_SWALLOC;
 285		} else if (!strcmp(this_char, MNTOPT_SUNIT)) {
 286			if (!value || !*value) {
 287				xfs_warn(mp, "%s option requires an argument",
 288					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) {
 294				xfs_warn(mp, "%s option requires an argument",
 295					this_char);
 296				return EINVAL;
 297			}
 298			dswidth = simple_strtoul(value, &eov, 10);
 
 
 
 299		} else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
 300			mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
 301#if !XFS_BIG_INUMS
 302			xfs_warn(mp, "%s option not allowed on this system",
 303				this_char);
 304			return EINVAL;
 305#endif
 306		} else if (!strcmp(this_char, MNTOPT_NOUUID)) {
 307			mp->m_flags |= XFS_MOUNT_NOUUID;
 308		} else if (!strcmp(this_char, MNTOPT_BARRIER)) {
 309			mp->m_flags |= XFS_MOUNT_BARRIER;
 310		} else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
 311			mp->m_flags &= ~XFS_MOUNT_BARRIER;
 312		} else if (!strcmp(this_char, MNTOPT_IKEEP)) {
 313			mp->m_flags |= XFS_MOUNT_IKEEP;
 314		} else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
 315			mp->m_flags &= ~XFS_MOUNT_IKEEP;
 316		} else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
 317			mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
 318		} else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
 319			mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
 320		} else if (!strcmp(this_char, MNTOPT_ATTR2)) {
 321			mp->m_flags |= XFS_MOUNT_ATTR2;
 322		} else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
 323			mp->m_flags &= ~XFS_MOUNT_ATTR2;
 324			mp->m_flags |= XFS_MOUNT_NOATTR2;
 325		} else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
 326			mp->m_flags |= XFS_MOUNT_FILESTREAMS;
 327		} else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
 328			mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
 329					  XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
 330					  XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
 331					  XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
 332		} else if (!strcmp(this_char, MNTOPT_QUOTA) ||
 333			   !strcmp(this_char, MNTOPT_UQUOTA) ||
 334			   !strcmp(this_char, MNTOPT_USRQUOTA)) {
 335			mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
 336					 XFS_UQUOTA_ENFD);
 337		} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
 338			   !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
 339			mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
 340			mp->m_qflags &= ~XFS_UQUOTA_ENFD;
 341		} else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
 342			   !strcmp(this_char, MNTOPT_PRJQUOTA)) {
 343			mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
 344					 XFS_OQUOTA_ENFD);
 345		} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
 346			mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
 347			mp->m_qflags &= ~XFS_OQUOTA_ENFD;
 348		} else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
 349			   !strcmp(this_char, MNTOPT_GRPQUOTA)) {
 350			mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
 351					 XFS_OQUOTA_ENFD);
 352		} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
 353			mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
 354			mp->m_qflags &= ~XFS_OQUOTA_ENFD;
 355		} else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
 356			mp->m_flags |= XFS_MOUNT_DELAYLOG;
 
 357		} else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
 358			mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
 359			xfs_warn(mp,
 360	"nodelaylog is deprecated and will be removed in Linux 3.3");
 361		} 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;
 365		} else if (!strcmp(this_char, "ihashsize")) {
 366			xfs_warn(mp,
 367	"ihashsize no longer used, option is deprecated.");
 368		} else if (!strcmp(this_char, "osyncisdsync")) {
 369			xfs_warn(mp,
 370	"osyncisdsync has no effect, option is deprecated.");
 371		} else if (!strcmp(this_char, "osyncisosync")) {
 372			xfs_warn(mp,
 373	"osyncisosync has no effect, option is deprecated.");
 374		} else if (!strcmp(this_char, "irixsgid")) {
 375			xfs_warn(mp,
 376	"irixsgid is now a sysctl(2) variable, option is deprecated.");
 377		} else {
 378			xfs_warn(mp, "unknown mount option [%s].", this_char);
 379			return EINVAL;
 380		}
 381	}
 382
 383	/*
 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)) {
 388		xfs_warn(mp, "no-recovery mounts must be read-only.");
 389		return EINVAL;
 390	}
 391
 392	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
 393		xfs_warn(mp,
 394	"sunit and swidth options incompatible with the noalign option");
 395		return EINVAL;
 396	}
 397
 398	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
 405#ifndef CONFIG_XFS_QUOTA
 406	if (XFS_IS_QUOTA_RUNNING(mp)) {
 407		xfs_warn(mp, "quota support not available in this kernel.");
 408		return EINVAL;
 409	}
 410#endif
 411
 412	if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
 413	    (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
 414		xfs_warn(mp, "cannot mount with both project and group quota");
 415		return EINVAL;
 416	}
 417
 418	if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
 419		xfs_warn(mp, "sunit and swidth must be specified together");
 420		return EINVAL;
 421	}
 422
 423	if (dsunit && (dswidth % dsunit != 0)) {
 424		xfs_warn(mp,
 425	"stripe width (%d) must be a multiple of the stripe unit (%d)",
 426			dswidth, dsunit);
 427		return EINVAL;
 428	}
 429
 430done:
 431	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)) {
 451		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
 452			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))) {
 460		xfs_warn(mp,
 461			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
 462			mp->m_logbsize);
 463		return XFS_ERROR(EINVAL);
 464	}
 465
 466	if (iosizelog) {
 467		if (iosizelog > XFS_MAX_IO_LOG ||
 468		    iosizelog < XFS_MIN_IO_LOG) {
 469			xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
 470				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
 480	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 */
 495		{ XFS_MOUNT_IKEEP,		"," MNTOPT_IKEEP },
 496		{ XFS_MOUNT_WSYNC,		"," MNTOPT_WSYNC },
 497		{ XFS_MOUNT_NOALIGN,		"," MNTOPT_NOALIGN },
 498		{ XFS_MOUNT_SWALLOC,		"," MNTOPT_SWALLOC },
 499		{ XFS_MOUNT_NOUUID,		"," MNTOPT_NOUUID },
 500		{ XFS_MOUNT_NORECOVERY,		"," MNTOPT_NORECOVERY },
 501		{ XFS_MOUNT_ATTR2,		"," MNTOPT_ATTR2 },
 502		{ XFS_MOUNT_FILESTREAMS,	"," MNTOPT_FILESTREAM },
 503		{ XFS_MOUNT_GRPID,		"," MNTOPT_GRPID },
 504		{ XFS_MOUNT_DELAYLOG,		"," MNTOPT_DELAYLOG },
 505		{ XFS_MOUNT_DISCARD,		"," MNTOPT_DISCARD },
 
 506		{ 0, NULL }
 507	};
 508	static struct proc_xfs_info xfs_info_unset[] = {
 509		/* the few simple ones we can get from the mount struct */
 510		{ 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
 552	/* Either project or group quotas can be active, not both */
 553
 554	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	}
 565
 566	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
 567		seq_puts(m, "," MNTOPT_NOQUOTA);
 568
 569	return 0;
 570}
 571__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).
 580	 * __block_write_begin does this in an [unsigned] long...
 581	 *      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
 593# if defined(CONFIG_LBDAF)
 594	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
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 605STATIC int
 606xfs_blkdev_get(
 607	xfs_mount_t		*mp,
 608	const char		*name,
 609	struct block_device	**bdevp)
 610{
 611	int			error = 0;
 612
 613	*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
 614				    mp);
 615	if (IS_ERR(*bdevp)) {
 616		error = PTR_ERR(*bdevp);
 617		xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
 618	}
 619
 620	return -error;
 621}
 622
 623STATIC void
 624xfs_blkdev_put(
 625	struct block_device	*bdev)
 626{
 627	if (bdev)
 628		blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
 629}
 630
 631void
 632xfs_blkdev_issue_flush(
 633	xfs_buftarg_t		*buftarg)
 634{
 635	blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
 636}
 637
 638STATIC void
 639xfs_close_devices(
 640	struct xfs_mount	*mp)
 641{
 642	if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
 643		struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
 644		xfs_free_buftarg(mp, mp->m_logdev_targp);
 645		xfs_blkdev_put(logdev);
 646	}
 647	if (mp->m_rtdev_targp) {
 648		struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
 649		xfs_free_buftarg(mp, mp->m_rtdev_targp);
 650		xfs_blkdev_put(rtdev);
 651	}
 652	xfs_free_buftarg(mp, mp->m_ddev_targp);
 653}
 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(
 667	struct xfs_mount	*mp)
 668{
 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	 */
 676	if (mp->m_logname) {
 677		error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
 678		if (error)
 679			goto out;
 680	}
 681
 682	if (mp->m_rtname) {
 683		error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
 684		if (error)
 685			goto out_close_logdev;
 686
 687		if (rtdev == ddev || rtdev == logdev) {
 688			xfs_warn(mp,
 689	"Cannot mount filesystem with identical rtdev and ddev/logdev.");
 690			error = EINVAL;
 691			goto out_close_rtdev;
 692		}
 693	}
 694
 695	/*
 696	 * Setup xfs_mount buffer target pointers
 697	 */
 698	error = ENOMEM;
 699	mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
 700	if (!mp->m_ddev_targp)
 701		goto out_close_rtdev;
 702
 703	if (rtdev) {
 704		mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
 705							mp->m_fsname);
 706		if (!mp->m_rtdev_targp)
 707			goto out_free_ddev_targ;
 708	}
 709
 710	if (logdev && logdev != ddev) {
 711		mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
 712							mp->m_fsname);
 713		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)
 723		xfs_free_buftarg(mp, mp->m_rtdev_targp);
 724 out_free_ddev_targ:
 725	xfs_free_buftarg(mp, mp->m_ddev_targp);
 726 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
 736/*
 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;
 744
 745	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}
 771
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 772/* Catch misguided souls that try to use this interface on XFS */
 773STATIC struct inode *
 774xfs_fs_alloc_inode(
 775	struct super_block	*sb)
 776{
 777	BUG();
 778	return NULL;
 779}
 780
 781/*
 782 * Now that the generic code is guaranteed not to be accessing
 783 * the linux inode, we can reclaim the inode.
 784 */
 785STATIC void
 786xfs_fs_destroy_inode(
 787	struct inode		*inode)
 788{
 789	struct xfs_inode	*ip = XFS_I(inode);
 790
 791	trace_xfs_destroy_inode(ip);
 792
 793	XFS_STATS_INC(vn_reclaim);
 794
 795	/* bad inode, get out here ASAP */
 796	if (is_bad_inode(inode))
 797		goto out_reclaim;
 798
 799	xfs_ioend_wait(ip);
 800
 801	ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
 802
 803	/*
 804	 * We should never get here with one of the reclaim flags already set.
 805	 */
 806	ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
 807	ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
 808
 809	/*
 810	 * We always use background reclaim here because even if the
 811	 * inode is clean, it still may be under IO and hence we have
 812	 * to take the flush lock. The background reclaim path handles
 813	 * this more efficiently than we can here, so simply let background
 814	 * reclaim tear down all inodes.
 815	 */
 816out_reclaim:
 817	xfs_inode_set_reclaim_tag(ip);
 818}
 819
 820/*
 821 * Slab object creation initialisation for the XFS inode.
 822 * This covers only the idempotent fields in the XFS inode;
 823 * all other fields need to be initialised on allocation
 824 * from the slab. This avoids the need to repeatedly initialise
 825 * fields in the xfs inode that left in the initialise state
 826 * when freeing the inode.
 827 */
 828STATIC void
 829xfs_fs_inode_init_once(
 830	void			*inode)
 831{
 832	struct xfs_inode	*ip = inode;
 833
 834	memset(ip, 0, sizeof(struct xfs_inode));
 835
 836	/* vfs inode */
 837	inode_init_once(VFS_I(ip));
 838
 839	/* xfs inode */
 840	atomic_set(&ip->i_iocount, 0);
 841	atomic_set(&ip->i_pincount, 0);
 842	spin_lock_init(&ip->i_flags_lock);
 843	init_waitqueue_head(&ip->i_ipin_wait);
 844	/*
 845	 * Because we want to use a counting completion, complete
 846	 * the flush completion once to allow a single access to
 847	 * the flush completion without blocking.
 848	 */
 849	init_completion(&ip->i_flush);
 850	complete(&ip->i_flush);
 851
 852	mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
 853		     "xfsino", ip->i_ino);
 854}
 855
 856/*
 857 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
 858 * we catch unlogged VFS level updates to the inode.
 859 *
 860 * We need the barrier() to maintain correct ordering between unlogged
 861 * updates and the transaction commit code that clears the i_update_core
 862 * field. This requires all updates to be completed before marking the
 863 * inode dirty.
 864 */
 865STATIC void
 866xfs_fs_dirty_inode(
 867	struct inode	*inode,
 868	int		flags)
 869{
 870	barrier();
 871	XFS_I(inode)->i_update_core = 1;
 872}
 873
 874STATIC int
 875xfs_log_inode(
 876	struct xfs_inode	*ip)
 877{
 878	struct xfs_mount	*mp = ip->i_mount;
 879	struct xfs_trans	*tp;
 880	int			error;
 881
 882	tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
 883	error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
 884	if (error) {
 885		xfs_trans_cancel(tp, 0);
 886		return error;
 887	}
 888
 889	xfs_ilock(ip, XFS_ILOCK_EXCL);
 890	xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL);
 891	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 892	return xfs_trans_commit(tp, 0);
 893}
 894
 895STATIC int
 896xfs_fs_write_inode(
 897	struct inode		*inode,
 898	struct writeback_control *wbc)
 899{
 900	struct xfs_inode	*ip = XFS_I(inode);
 901	struct xfs_mount	*mp = ip->i_mount;
 902	int			error = EAGAIN;
 903
 904	trace_xfs_write_inode(ip);
 905
 906	if (XFS_FORCED_SHUTDOWN(mp))
 907		return -XFS_ERROR(EIO);
 908	if (!ip->i_update_core)
 909		return 0;
 910
 911	if (wbc->sync_mode == WB_SYNC_ALL) {
 912		/*
 913		 * Make sure the inode has made it it into the log.  Instead
 914		 * of forcing it all the way to stable storage using a
 915		 * synchronous transaction we let the log force inside the
 916		 * ->sync_fs call do that for thus, which reduces the number
 917		 * of synchronous log foces dramatically.
 918		 */
 919		xfs_ioend_wait(ip);
 920		error = xfs_log_inode(ip);
 921		if (error)
 922			goto out;
 923		return 0;
 924	} else {
 925		/*
 926		 * We make this non-blocking if the inode is contended, return
 927		 * EAGAIN to indicate to the caller that they did not succeed.
 928		 * This prevents the flush path from blocking on inodes inside
 929		 * another operation right now, they get caught later by
 930		 * xfs_sync.
 931		 */
 932		if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
 933			goto out;
 934
 935		if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
 936			goto out_unlock;
 937
 938		/*
 939		 * Now we have the flush lock and the inode is not pinned, we
 940		 * can check if the inode is really clean as we know that
 941		 * there are no pending transaction completions, it is not
 942		 * waiting on the delayed write queue and there is no IO in
 943		 * progress.
 944		 */
 945		if (xfs_inode_clean(ip)) {
 946			xfs_ifunlock(ip);
 947			error = 0;
 948			goto out_unlock;
 949		}
 950		error = xfs_iflush(ip, SYNC_TRYLOCK);
 951	}
 952
 953 out_unlock:
 954	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 955 out:
 956	/*
 957	 * if we failed to write out the inode then mark
 958	 * it dirty again so we'll try again later.
 959	 */
 960	if (error)
 961		xfs_mark_inode_dirty_sync(ip);
 962	return -error;
 963}
 964
 965STATIC void
 966xfs_fs_evict_inode(
 967	struct inode		*inode)
 968{
 969	xfs_inode_t		*ip = XFS_I(inode);
 970
 
 
 971	trace_xfs_evict_inode(ip);
 972
 973	truncate_inode_pages(&inode->i_data, 0);
 974	end_writeback(inode);
 975	XFS_STATS_INC(vn_rele);
 976	XFS_STATS_INC(vn_remove);
 977	XFS_STATS_DEC(vn_active);
 978
 979	/*
 980	 * The iolock is used by the file system to coordinate reads,
 981	 * writes, and block truncates.  Up to this point the lock
 982	 * protected concurrent accesses by users of the inode.  But
 983	 * from here forward we're doing some final processing of the
 984	 * inode because we're done with it, and although we reuse the
 985	 * iolock for protection it is really a distinct lock class
 986	 * (in the lockdep sense) from before.  To keep lockdep happy
 987	 * (and basically indicate what we are doing), we explicitly
 988	 * re-init the iolock here.
 989	 */
 990	ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
 991	mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
 992	lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
 993			&xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
 994
 995	xfs_inactive(ip);
 996}
 997
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 998STATIC void
 999xfs_free_fsname(
1000	struct xfs_mount	*mp)
1001{
1002	kfree(mp->m_fsname);
1003	kfree(mp->m_rtname);
1004	kfree(mp->m_logname);
1005}
1006
1007STATIC void
1008xfs_fs_put_super(
1009	struct super_block	*sb)
1010{
1011	struct xfs_mount	*mp = XFS_M(sb);
1012
1013	xfs_syncd_stop(mp);
1014
1015	/*
1016	 * Blow away any referenced inode in the filestreams cache.
1017	 * This can and will cause log traffic as inodes go inactive
1018	 * here.
1019	 */
1020	xfs_filestream_unmount(mp);
1021
1022	XFS_bflush(mp->m_ddev_targp);
1023
1024	xfs_unmountfs(mp);
 
1025	xfs_freesb(mp);
1026	xfs_icsb_destroy_counters(mp);
 
1027	xfs_close_devices(mp);
1028	xfs_free_fsname(mp);
1029	kfree(mp);
1030}
1031
1032STATIC int
1033xfs_fs_sync_fs(
1034	struct super_block	*sb,
1035	int			wait)
1036{
1037	struct xfs_mount	*mp = XFS_M(sb);
1038	int			error;
1039
1040	/*
1041	 * Not much we can do for the first async pass.  Writing out the
1042	 * superblock would be counter-productive as we are going to redirty
1043	 * when writing out other data and metadata (and writing out a single
1044	 * block is quite fast anyway).
1045	 *
1046	 * Try to asynchronously kick off quota syncing at least.
1047	 */
1048	if (!wait) {
1049		xfs_qm_sync(mp, SYNC_TRYLOCK);
1050		return 0;
1051	}
1052
1053	error = xfs_quiesce_data(mp);
1054	if (error)
1055		return -error;
1056
 
1057	if (laptop_mode) {
1058		/*
1059		 * The disk must be active because we're syncing.
1060		 * We schedule xfssyncd now (now that the disk is
1061		 * active) instead of later (when it might not be).
1062		 */
1063		flush_delayed_work_sync(&mp->m_sync_work);
1064	}
1065
1066	return 0;
1067}
1068
1069STATIC int
1070xfs_fs_statfs(
1071	struct dentry		*dentry,
1072	struct kstatfs		*statp)
1073{
1074	struct xfs_mount	*mp = XFS_M(dentry->d_sb);
1075	xfs_sb_t		*sbp = &mp->m_sb;
1076	struct xfs_inode	*ip = XFS_I(dentry->d_inode);
1077	__uint64_t		fakeinos, id;
1078	xfs_extlen_t		lsize;
1079	__int64_t		ffree;
1080
1081	statp->f_type = XFS_SB_MAGIC;
1082	statp->f_namelen = MAXNAMELEN - 1;
1083
1084	id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1085	statp->f_fsid.val[0] = (u32)id;
1086	statp->f_fsid.val[1] = (u32)(id >> 32);
1087
1088	xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1089
1090	spin_lock(&mp->m_sb_lock);
1091	statp->f_bsize = sbp->sb_blocksize;
1092	lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1093	statp->f_blocks = sbp->sb_dblocks - lsize;
1094	statp->f_bfree = statp->f_bavail =
1095				sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1096	fakeinos = statp->f_bfree << sbp->sb_inopblog;
1097	statp->f_files =
1098	    MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1099	if (mp->m_maxicount)
1100		statp->f_files = min_t(typeof(statp->f_files),
1101					statp->f_files,
1102					mp->m_maxicount);
1103
1104	/* make sure statp->f_ffree does not underflow */
1105	ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1106	statp->f_ffree = max_t(__int64_t, ffree, 0);
1107
1108	spin_unlock(&mp->m_sb_lock);
1109
1110	if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1111	    ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1112			      (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1113		xfs_qm_statvfs(ip, statp);
1114	return 0;
1115}
1116
1117STATIC void
1118xfs_save_resvblks(struct xfs_mount *mp)
1119{
1120	__uint64_t resblks = 0;
1121
1122	mp->m_resblks_save = mp->m_resblks;
1123	xfs_reserve_blocks(mp, &resblks, NULL);
1124}
1125
1126STATIC void
1127xfs_restore_resvblks(struct xfs_mount *mp)
1128{
1129	__uint64_t resblks;
1130
1131	if (mp->m_resblks_save) {
1132		resblks = mp->m_resblks_save;
1133		mp->m_resblks_save = 0;
1134	} else
1135		resblks = xfs_default_resblks(mp);
1136
1137	xfs_reserve_blocks(mp, &resblks, NULL);
1138}
1139
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1140STATIC int
1141xfs_fs_remount(
1142	struct super_block	*sb,
1143	int			*flags,
1144	char			*options)
1145{
1146	struct xfs_mount	*mp = XFS_M(sb);
1147	substring_t		args[MAX_OPT_ARGS];
1148	char			*p;
1149	int			error;
1150
 
1151	while ((p = strsep(&options, ",")) != NULL) {
1152		int token;
1153
1154		if (!*p)
1155			continue;
1156
1157		token = match_token(p, tokens, args);
1158		switch (token) {
1159		case Opt_barrier:
1160			mp->m_flags |= XFS_MOUNT_BARRIER;
1161			break;
1162		case Opt_nobarrier:
1163			mp->m_flags &= ~XFS_MOUNT_BARRIER;
1164			break;
 
 
 
 
 
 
1165		default:
1166			/*
1167			 * Logically we would return an error here to prevent
1168			 * users from believing they might have changed
1169			 * mount options using remount which can't be changed.
1170			 *
1171			 * But unfortunately mount(8) adds all options from
1172			 * mtab and fstab to the mount arguments in some cases
1173			 * so we can't blindly reject options, but have to
1174			 * check for each specified option if it actually
1175			 * differs from the currently set option and only
1176			 * reject it if that's the case.
1177			 *
1178			 * Until that is implemented we return success for
1179			 * every remount request, and silently ignore all
1180			 * options that we can't actually change.
1181			 */
1182#if 0
1183			xfs_info(mp,
1184		"mount option \"%s\" not supported for remount\n", p);
1185			return -EINVAL;
1186#else
1187			break;
1188#endif
1189		}
1190	}
1191
1192	/* ro -> rw */
1193	if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1194		mp->m_flags &= ~XFS_MOUNT_RDONLY;
1195
1196		/*
1197		 * If this is the first remount to writeable state we
1198		 * might have some superblock changes to update.
1199		 */
1200		if (mp->m_update_flags) {
1201			error = xfs_mount_log_sb(mp, mp->m_update_flags);
1202			if (error) {
1203				xfs_warn(mp, "failed to write sb changes");
1204				return error;
1205			}
1206			mp->m_update_flags = 0;
1207		}
1208
1209		/*
1210		 * Fill out the reserve pool if it is empty. Use the stashed
1211		 * value if it is non-zero, otherwise go with the default.
1212		 */
1213		xfs_restore_resvblks(mp);
 
1214	}
1215
1216	/* rw -> ro */
1217	if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1218		/*
1219		 * After we have synced the data but before we sync the
1220		 * metadata, we need to free up the reserve block pool so that
1221		 * the used block count in the superblock on disk is correct at
1222		 * the end of the remount. Stash the current reserve pool size
1223		 * so that if we get remounted rw, we can return it to the same
1224		 * size.
1225		 */
1226
1227		xfs_quiesce_data(mp);
1228		xfs_save_resvblks(mp);
1229		xfs_quiesce_attr(mp);
1230		mp->m_flags |= XFS_MOUNT_RDONLY;
1231	}
1232
1233	return 0;
1234}
1235
1236/*
1237 * Second stage of a freeze. The data is already frozen so we only
1238 * need to take care of the metadata. Once that's done write a dummy
1239 * record to dirty the log in case of a crash while frozen.
1240 */
1241STATIC int
1242xfs_fs_freeze(
1243	struct super_block	*sb)
1244{
1245	struct xfs_mount	*mp = XFS_M(sb);
1246
1247	xfs_save_resvblks(mp);
1248	xfs_quiesce_attr(mp);
1249	return -xfs_fs_log_dummy(mp);
1250}
1251
1252STATIC int
1253xfs_fs_unfreeze(
1254	struct super_block	*sb)
1255{
1256	struct xfs_mount	*mp = XFS_M(sb);
1257
1258	xfs_restore_resvblks(mp);
 
1259	return 0;
1260}
1261
1262STATIC int
1263xfs_fs_show_options(
1264	struct seq_file		*m,
1265	struct vfsmount		*mnt)
1266{
1267	return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1268}
1269
1270/*
1271 * This function fills in xfs_mount_t fields based on mount args.
1272 * Note: the superblock _has_ now been read in.
1273 */
1274STATIC int
1275xfs_finish_flags(
1276	struct xfs_mount	*mp)
1277{
1278	int			ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1279
1280	/* Fail a mount where the logbuf is smaller than the log stripe */
1281	if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1282		if (mp->m_logbsize <= 0 &&
1283		    mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1284			mp->m_logbsize = mp->m_sb.sb_logsunit;
1285		} else if (mp->m_logbsize > 0 &&
1286			   mp->m_logbsize < mp->m_sb.sb_logsunit) {
1287			xfs_warn(mp,
1288		"logbuf size must be greater than or equal to log stripe size");
1289			return XFS_ERROR(EINVAL);
1290		}
1291	} else {
1292		/* Fail a mount if the logbuf is larger than 32K */
1293		if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1294			xfs_warn(mp,
1295		"logbuf size for version 1 logs must be 16K or 32K");
1296			return XFS_ERROR(EINVAL);
1297		}
1298	}
1299
1300	/*
 
 
 
 
 
 
 
 
 
 
 
1301	 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1302	 * told by noattr2 to turn it off
1303	 */
1304	if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1305	    !(mp->m_flags & XFS_MOUNT_NOATTR2))
1306		mp->m_flags |= XFS_MOUNT_ATTR2;
1307
1308	/*
1309	 * prohibit r/w mounts of read-only filesystems
1310	 */
1311	if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1312		xfs_warn(mp,
1313			"cannot mount a read-only filesystem as read-write");
1314		return XFS_ERROR(EROFS);
1315	}
1316
 
 
 
 
 
 
 
 
1317	return 0;
1318}
1319
1320STATIC int
1321xfs_fs_fill_super(
1322	struct super_block	*sb,
1323	void			*data,
1324	int			silent)
1325{
1326	struct inode		*root;
1327	struct xfs_mount	*mp = NULL;
1328	int			flags = 0, error = ENOMEM;
1329
1330	mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1331	if (!mp)
1332		goto out;
1333
1334	spin_lock_init(&mp->m_sb_lock);
1335	mutex_init(&mp->m_growlock);
1336	atomic_set(&mp->m_active_trans, 0);
 
 
1337
1338	mp->m_super = sb;
1339	sb->s_fs_info = mp;
1340
1341	error = xfs_parseargs(mp, (char *)data);
1342	if (error)
1343		goto out_free_fsname;
1344
1345	sb_min_blocksize(sb, BBSIZE);
1346	sb->s_xattr = xfs_xattr_handlers;
1347	sb->s_export_op = &xfs_export_operations;
1348#ifdef CONFIG_XFS_QUOTA
1349	sb->s_qcop = &xfs_quotactl_operations;
1350#endif
1351	sb->s_op = &xfs_super_operations;
1352
1353	if (silent)
1354		flags |= XFS_MFSI_QUIET;
1355
1356	error = xfs_open_devices(mp);
1357	if (error)
1358		goto out_free_fsname;
1359
1360	error = xfs_icsb_init_counters(mp);
1361	if (error)
1362		goto out_close_devices;
1363
 
 
 
 
1364	error = xfs_readsb(mp, flags);
1365	if (error)
1366		goto out_destroy_counters;
1367
1368	error = xfs_finish_flags(mp);
1369	if (error)
1370		goto out_free_sb;
1371
1372	error = xfs_setup_devices(mp);
1373	if (error)
1374		goto out_free_sb;
1375
1376	error = xfs_filestream_mount(mp);
1377	if (error)
1378		goto out_free_sb;
1379
1380	/*
1381	 * we must configure the block size in the superblock before we run the
1382	 * full mount process as the mount process can lookup and cache inodes.
1383	 * For the same reason we must also initialise the syncd and register
1384	 * the inode cache shrinker so that inodes can be reclaimed during
1385	 * operations like a quotacheck that iterate all inodes in the
1386	 * filesystem.
1387	 */
1388	sb->s_magic = XFS_SB_MAGIC;
1389	sb->s_blocksize = mp->m_sb.sb_blocksize;
1390	sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1391	sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
 
1392	sb->s_time_gran = 1;
1393	set_posix_acl_flag(sb);
1394
 
 
 
 
1395	error = xfs_mountfs(mp);
1396	if (error)
1397		goto out_filestream_unmount;
1398
1399	error = xfs_syncd_init(mp);
1400	if (error)
1401		goto out_unmount;
1402
1403	root = igrab(VFS_I(mp->m_rootip));
1404	if (!root) {
1405		error = ENOENT;
1406		goto out_syncd_stop;
1407	}
1408	if (is_bad_inode(root)) {
1409		error = EINVAL;
1410		goto out_syncd_stop;
1411	}
1412	sb->s_root = d_alloc_root(root);
1413	if (!sb->s_root) {
1414		error = ENOMEM;
1415		goto out_iput;
1416	}
1417
1418	return 0;
1419
1420 out_filestream_unmount:
1421	xfs_filestream_unmount(mp);
1422 out_free_sb:
1423	xfs_freesb(mp);
1424 out_destroy_counters:
1425	xfs_icsb_destroy_counters(mp);
 
 
1426 out_close_devices:
1427	xfs_close_devices(mp);
1428 out_free_fsname:
1429	xfs_free_fsname(mp);
1430	kfree(mp);
1431 out:
1432	return -error;
1433
1434 out_iput:
1435	iput(root);
1436 out_syncd_stop:
1437	xfs_syncd_stop(mp);
1438 out_unmount:
1439	/*
1440	 * Blow away any referenced inode in the filestreams cache.
1441	 * This can and will cause log traffic as inodes go inactive
1442	 * here.
1443	 */
1444	xfs_filestream_unmount(mp);
1445
1446	XFS_bflush(mp->m_ddev_targp);
1447
1448	xfs_unmountfs(mp);
1449	goto out_free_sb;
1450}
1451
1452STATIC struct dentry *
1453xfs_fs_mount(
1454	struct file_system_type	*fs_type,
1455	int			flags,
1456	const char		*dev_name,
1457	void			*data)
1458{
1459	return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1460}
1461
1462static int
1463xfs_fs_nr_cached_objects(
1464	struct super_block	*sb)
 
1465{
1466	return xfs_reclaim_inodes_count(XFS_M(sb));
1467}
1468
1469static void
1470xfs_fs_free_cached_objects(
1471	struct super_block	*sb,
1472	int			nr_to_scan)
 
1473{
1474	xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1475}
1476
1477static const struct super_operations xfs_super_operations = {
1478	.alloc_inode		= xfs_fs_alloc_inode,
1479	.destroy_inode		= xfs_fs_destroy_inode,
1480	.dirty_inode		= xfs_fs_dirty_inode,
1481	.write_inode		= xfs_fs_write_inode,
1482	.evict_inode		= xfs_fs_evict_inode,
 
1483	.put_super		= xfs_fs_put_super,
1484	.sync_fs		= xfs_fs_sync_fs,
1485	.freeze_fs		= xfs_fs_freeze,
1486	.unfreeze_fs		= xfs_fs_unfreeze,
1487	.statfs			= xfs_fs_statfs,
1488	.remount_fs		= xfs_fs_remount,
1489	.show_options		= xfs_fs_show_options,
1490	.nr_cached_objects	= xfs_fs_nr_cached_objects,
1491	.free_cached_objects	= xfs_fs_free_cached_objects,
1492};
1493
1494static struct file_system_type xfs_fs_type = {
1495	.owner			= THIS_MODULE,
1496	.name			= "xfs",
1497	.mount			= xfs_fs_mount,
1498	.kill_sb		= kill_block_super,
1499	.fs_flags		= FS_REQUIRES_DEV,
1500};
 
1501
1502STATIC int __init
1503xfs_init_zones(void)
1504{
1505
1506	xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1507	if (!xfs_ioend_zone)
1508		goto out;
1509
1510	xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1511						  xfs_ioend_zone);
1512	if (!xfs_ioend_pool)
1513		goto out_destroy_ioend_zone;
1514
1515	xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1516						"xfs_log_ticket");
1517	if (!xfs_log_ticket_zone)
1518		goto out_destroy_ioend_pool;
1519
1520	xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1521						"xfs_bmap_free_item");
1522	if (!xfs_bmap_free_item_zone)
1523		goto out_destroy_log_ticket_zone;
1524
1525	xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1526						"xfs_btree_cur");
1527	if (!xfs_btree_cur_zone)
1528		goto out_destroy_bmap_free_item_zone;
1529
1530	xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1531						"xfs_da_state");
1532	if (!xfs_da_state_zone)
1533		goto out_destroy_btree_cur_zone;
1534
1535	xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1536	if (!xfs_dabuf_zone)
1537		goto out_destroy_da_state_zone;
1538
1539	xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1540	if (!xfs_ifork_zone)
1541		goto out_destroy_dabuf_zone;
1542
1543	xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1544	if (!xfs_trans_zone)
1545		goto out_destroy_ifork_zone;
1546
1547	xfs_log_item_desc_zone =
1548		kmem_zone_init(sizeof(struct xfs_log_item_desc),
1549			       "xfs_log_item_desc");
1550	if (!xfs_log_item_desc_zone)
1551		goto out_destroy_trans_zone;
1552
1553	/*
1554	 * The size of the zone allocated buf log item is the maximum
1555	 * size possible under XFS.  This wastes a little bit of memory,
1556	 * but it is much faster.
1557	 */
1558	xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1559				(((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
1560				  NBWORD) * sizeof(int))), "xfs_buf_item");
1561	if (!xfs_buf_item_zone)
1562		goto out_destroy_log_item_desc_zone;
1563
1564	xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1565			((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1566				 sizeof(xfs_extent_t))), "xfs_efd_item");
1567	if (!xfs_efd_zone)
1568		goto out_destroy_buf_item_zone;
1569
1570	xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1571			((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1572				sizeof(xfs_extent_t))), "xfs_efi_item");
1573	if (!xfs_efi_zone)
1574		goto out_destroy_efd_zone;
1575
1576	xfs_inode_zone =
1577		kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1578			KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1579			xfs_fs_inode_init_once);
1580	if (!xfs_inode_zone)
1581		goto out_destroy_efi_zone;
1582
1583	xfs_ili_zone =
1584		kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1585					KM_ZONE_SPREAD, NULL);
1586	if (!xfs_ili_zone)
1587		goto out_destroy_inode_zone;
 
 
 
 
1588
1589	return 0;
1590
 
 
1591 out_destroy_inode_zone:
1592	kmem_zone_destroy(xfs_inode_zone);
1593 out_destroy_efi_zone:
1594	kmem_zone_destroy(xfs_efi_zone);
1595 out_destroy_efd_zone:
1596	kmem_zone_destroy(xfs_efd_zone);
1597 out_destroy_buf_item_zone:
1598	kmem_zone_destroy(xfs_buf_item_zone);
1599 out_destroy_log_item_desc_zone:
1600	kmem_zone_destroy(xfs_log_item_desc_zone);
1601 out_destroy_trans_zone:
1602	kmem_zone_destroy(xfs_trans_zone);
1603 out_destroy_ifork_zone:
1604	kmem_zone_destroy(xfs_ifork_zone);
1605 out_destroy_dabuf_zone:
1606	kmem_zone_destroy(xfs_dabuf_zone);
1607 out_destroy_da_state_zone:
1608	kmem_zone_destroy(xfs_da_state_zone);
1609 out_destroy_btree_cur_zone:
1610	kmem_zone_destroy(xfs_btree_cur_zone);
1611 out_destroy_bmap_free_item_zone:
1612	kmem_zone_destroy(xfs_bmap_free_item_zone);
1613 out_destroy_log_ticket_zone:
1614	kmem_zone_destroy(xfs_log_ticket_zone);
1615 out_destroy_ioend_pool:
1616	mempool_destroy(xfs_ioend_pool);
1617 out_destroy_ioend_zone:
1618	kmem_zone_destroy(xfs_ioend_zone);
1619 out:
1620	return -ENOMEM;
1621}
1622
1623STATIC void
1624xfs_destroy_zones(void)
1625{
 
 
 
 
 
 
1626	kmem_zone_destroy(xfs_ili_zone);
1627	kmem_zone_destroy(xfs_inode_zone);
1628	kmem_zone_destroy(xfs_efi_zone);
1629	kmem_zone_destroy(xfs_efd_zone);
1630	kmem_zone_destroy(xfs_buf_item_zone);
1631	kmem_zone_destroy(xfs_log_item_desc_zone);
1632	kmem_zone_destroy(xfs_trans_zone);
1633	kmem_zone_destroy(xfs_ifork_zone);
1634	kmem_zone_destroy(xfs_dabuf_zone);
1635	kmem_zone_destroy(xfs_da_state_zone);
1636	kmem_zone_destroy(xfs_btree_cur_zone);
1637	kmem_zone_destroy(xfs_bmap_free_item_zone);
1638	kmem_zone_destroy(xfs_log_ticket_zone);
1639	mempool_destroy(xfs_ioend_pool);
1640	kmem_zone_destroy(xfs_ioend_zone);
1641
1642}
1643
1644STATIC int __init
1645xfs_init_workqueues(void)
1646{
1647	/*
1648	 * max_active is set to 8 to give enough concurency to allow
1649	 * multiple work operations on each CPU to run. This allows multiple
1650	 * filesystems to be running sync work concurrently, and scales with
1651	 * the number of CPUs in the system.
1652	 */
1653	xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
1654	if (!xfs_syncd_wq)
1655		return -ENOMEM;
 
1656	return 0;
1657}
1658
1659STATIC void
1660xfs_destroy_workqueues(void)
1661{
1662	destroy_workqueue(xfs_syncd_wq);
1663}
1664
1665STATIC int __init
1666init_xfs_fs(void)
1667{
1668	int			error;
1669
1670	printk(KERN_INFO XFS_VERSION_STRING " with "
1671			 XFS_BUILD_OPTIONS " enabled\n");
1672
1673	xfs_ioend_init();
1674	xfs_dir_startup();
1675
1676	error = xfs_init_zones();
1677	if (error)
1678		goto out;
1679
1680	error = xfs_init_workqueues();
1681	if (error)
1682		goto out_destroy_zones;
1683
1684	error = xfs_mru_cache_init();
1685	if (error)
1686		goto out_destroy_wq;
1687
1688	error = xfs_filestream_init();
1689	if (error)
1690		goto out_mru_cache_uninit;
1691
1692	error = xfs_buf_init();
1693	if (error)
1694		goto out_filestream_uninit;
1695
1696	error = xfs_init_procfs();
1697	if (error)
1698		goto out_buf_terminate;
1699
1700	error = xfs_sysctl_register();
1701	if (error)
1702		goto out_cleanup_procfs;
1703
1704	vfs_initquota();
 
 
1705
1706	error = register_filesystem(&xfs_fs_type);
1707	if (error)
1708		goto out_sysctl_unregister;
1709	return 0;
1710
 
 
1711 out_sysctl_unregister:
1712	xfs_sysctl_unregister();
1713 out_cleanup_procfs:
1714	xfs_cleanup_procfs();
1715 out_buf_terminate:
1716	xfs_buf_terminate();
1717 out_filestream_uninit:
1718	xfs_filestream_uninit();
1719 out_mru_cache_uninit:
1720	xfs_mru_cache_uninit();
1721 out_destroy_wq:
1722	xfs_destroy_workqueues();
1723 out_destroy_zones:
1724	xfs_destroy_zones();
1725 out:
1726	return error;
1727}
1728
1729STATIC void __exit
1730exit_xfs_fs(void)
1731{
1732	vfs_exitquota();
1733	unregister_filesystem(&xfs_fs_type);
1734	xfs_sysctl_unregister();
1735	xfs_cleanup_procfs();
1736	xfs_buf_terminate();
1737	xfs_filestream_uninit();
1738	xfs_mru_cache_uninit();
1739	xfs_destroy_workqueues();
1740	xfs_destroy_zones();
1741}
1742
1743module_init(init_xfs_fs);
1744module_exit(exit_xfs_fs);
1745
1746MODULE_AUTHOR("Silicon Graphics, Inc.");
1747MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1748MODULE_LICENSE("GPL");