+++ /dev/null
-/*
- * Copyright (c) 2000-2006 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "xfs.h"
-#include "xfs_bit.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_dir2.h"
-#include "xfs_alloc.h"
-#include "xfs_quota.h"
-#include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_bmap.h"
-#include "xfs_rtalloc.h"
-#include "xfs_error.h"
-#include "xfs_itable.h"
-#include "xfs_fsops.h"
-#include "xfs_attr.h"
-#include "xfs_buf_item.h"
-#include "xfs_utils.h"
-#include "xfs_vnodeops.h"
-#include "xfs_log_priv.h"
-#include "xfs_trans_priv.h"
-#include "xfs_filestream.h"
-#include "xfs_da_btree.h"
-#include "xfs_extfree_item.h"
-#include "xfs_mru_cache.h"
-#include "xfs_inode_item.h"
-#include "xfs_sync.h"
-#include "xfs_trace.h"
-
-#include <linux/namei.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/mount.h>
-#include <linux/mempool.h>
-#include <linux/writeback.h>
-#include <linux/kthread.h>
-#include <linux/freezer.h>
-#include <linux/parser.h>
-
-static const struct super_operations xfs_super_operations;
-static kmem_zone_t *xfs_ioend_zone;
-mempool_t *xfs_ioend_pool;
-
-#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
-#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
-#define MNTOPT_LOGDEV "logdev" /* log device */
-#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
-#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
-#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
-#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
-#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
-#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
-#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
-#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
-#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
-#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
-#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
-#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
-#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
-#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
-#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
-#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
- * unwritten extent conversion */
-#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
-#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
-#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
-#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
-#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
-#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
- * in stat(). */
-#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
-#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
-#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
-#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
-#define MNTOPT_NOQUOTA "noquota" /* no quotas */
-#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
-#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
-#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
-#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
-#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
-#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
-#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
-#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
-#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
-#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
-#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
-#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
-#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
-#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
-
-/*
- * Table driven mount option parser.
- *
- * Currently only used for remount, but it will be used for mount
- * in the future, too.
- */
-enum {
- Opt_barrier, Opt_nobarrier, Opt_err
-};
-
-static const match_table_t tokens = {
- {Opt_barrier, "barrier"},
- {Opt_nobarrier, "nobarrier"},
- {Opt_err, NULL}
-};
-
-
-STATIC unsigned long
-suffix_strtoul(char *s, char **endp, unsigned int base)
-{
- int last, shift_left_factor = 0;
- char *value = s;
-
- last = strlen(value) - 1;
- if (value[last] == 'K' || value[last] == 'k') {
- shift_left_factor = 10;
- value[last] = '\0';
- }
- if (value[last] == 'M' || value[last] == 'm') {
- shift_left_factor = 20;
- value[last] = '\0';
- }
- if (value[last] == 'G' || value[last] == 'g') {
- shift_left_factor = 30;
- value[last] = '\0';
- }
-
- return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
-}
-
-/*
- * This function fills in xfs_mount_t fields based on mount args.
- * Note: the superblock has _not_ yet been read in.
- *
- * Note that this function leaks the various device name allocations on
- * failure. The caller takes care of them.
- */
-STATIC int
-xfs_parseargs(
- struct xfs_mount *mp,
- char *options)
-{
- struct super_block *sb = mp->m_super;
- char *this_char, *value, *eov;
- int dsunit = 0;
- int dswidth = 0;
- int iosize = 0;
- __uint8_t iosizelog = 0;
-
- /*
- * set up the mount name first so all the errors will refer to the
- * correct device.
- */
- mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
- if (!mp->m_fsname)
- return ENOMEM;
- mp->m_fsname_len = strlen(mp->m_fsname) + 1;
-
- /*
- * Copy binary VFS mount flags we are interested in.
- */
- if (sb->s_flags & MS_RDONLY)
- mp->m_flags |= XFS_MOUNT_RDONLY;
- if (sb->s_flags & MS_DIRSYNC)
- mp->m_flags |= XFS_MOUNT_DIRSYNC;
- if (sb->s_flags & MS_SYNCHRONOUS)
- mp->m_flags |= XFS_MOUNT_WSYNC;
-
- /*
- * Set some default flags that could be cleared by the mount option
- * parsing.
- */
- mp->m_flags |= XFS_MOUNT_BARRIER;
- mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
- mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
- mp->m_flags |= XFS_MOUNT_DELAYLOG;
-
- /*
- * These can be overridden by the mount option parsing.
- */
- mp->m_logbufs = -1;
- mp->m_logbsize = -1;
-
- if (!options)
- goto done;
-
- while ((this_char = strsep(&options, ",")) != NULL) {
- if (!*this_char)
- continue;
- if ((value = strchr(this_char, '=')) != NULL)
- *value++ = 0;
-
- if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- mp->m_logbufs = simple_strtoul(value, &eov, 10);
- } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- mp->m_logbsize = suffix_strtoul(value, &eov, 10);
- } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
- if (!mp->m_logname)
- return ENOMEM;
- } else if (!strcmp(this_char, MNTOPT_MTPT)) {
- xfs_warn(mp, "%s option not allowed on this system",
- this_char);
- return EINVAL;
- } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
- if (!mp->m_rtname)
- return ENOMEM;
- } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- iosize = simple_strtoul(value, &eov, 10);
- iosizelog = ffs(iosize) - 1;
- } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- iosize = suffix_strtoul(value, &eov, 10);
- iosizelog = ffs(iosize) - 1;
- } else if (!strcmp(this_char, MNTOPT_GRPID) ||
- !strcmp(this_char, MNTOPT_BSDGROUPS)) {
- mp->m_flags |= XFS_MOUNT_GRPID;
- } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
- !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
- mp->m_flags &= ~XFS_MOUNT_GRPID;
- } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
- mp->m_flags |= XFS_MOUNT_WSYNC;
- } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
- mp->m_flags |= XFS_MOUNT_NORECOVERY;
- } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
- mp->m_flags |= XFS_MOUNT_NOALIGN;
- } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
- mp->m_flags |= XFS_MOUNT_SWALLOC;
- } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- dsunit = simple_strtoul(value, &eov, 10);
- } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
- if (!value || !*value) {
- xfs_warn(mp, "%s option requires an argument",
- this_char);
- return EINVAL;
- }
- dswidth = simple_strtoul(value, &eov, 10);
- } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
- mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
-#if !XFS_BIG_INUMS
- xfs_warn(mp, "%s option not allowed on this system",
- this_char);
- return EINVAL;
-#endif
- } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
- mp->m_flags |= XFS_MOUNT_NOUUID;
- } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
- mp->m_flags |= XFS_MOUNT_BARRIER;
- } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
- mp->m_flags &= ~XFS_MOUNT_BARRIER;
- } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
- mp->m_flags |= XFS_MOUNT_IKEEP;
- } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
- mp->m_flags &= ~XFS_MOUNT_IKEEP;
- } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
- mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
- } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
- mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
- } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
- mp->m_flags |= XFS_MOUNT_ATTR2;
- } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
- mp->m_flags &= ~XFS_MOUNT_ATTR2;
- mp->m_flags |= XFS_MOUNT_NOATTR2;
- } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
- mp->m_flags |= XFS_MOUNT_FILESTREAMS;
- } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
- mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
- XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
- XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
- XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
- } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
- !strcmp(this_char, MNTOPT_UQUOTA) ||
- !strcmp(this_char, MNTOPT_USRQUOTA)) {
- mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
- XFS_UQUOTA_ENFD);
- } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
- !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
- mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_UQUOTA_ENFD;
- } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
- !strcmp(this_char, MNTOPT_PRJQUOTA)) {
- mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
- XFS_OQUOTA_ENFD);
- } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
- mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_OQUOTA_ENFD;
- } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
- !strcmp(this_char, MNTOPT_GRPQUOTA)) {
- mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
- XFS_OQUOTA_ENFD);
- } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
- mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_OQUOTA_ENFD;
- } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
- mp->m_flags |= XFS_MOUNT_DELAYLOG;
- } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
- mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
- } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
- mp->m_flags |= XFS_MOUNT_DISCARD;
- } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
- mp->m_flags &= ~XFS_MOUNT_DISCARD;
- } else if (!strcmp(this_char, "ihashsize")) {
- xfs_warn(mp,
- "ihashsize no longer used, option is deprecated.");
- } else if (!strcmp(this_char, "osyncisdsync")) {
- xfs_warn(mp,
- "osyncisdsync has no effect, option is deprecated.");
- } else if (!strcmp(this_char, "osyncisosync")) {
- xfs_warn(mp,
- "osyncisosync has no effect, option is deprecated.");
- } else if (!strcmp(this_char, "irixsgid")) {
- xfs_warn(mp,
- "irixsgid is now a sysctl(2) variable, option is deprecated.");
- } else {
- xfs_warn(mp, "unknown mount option [%s].", this_char);
- return EINVAL;
- }
- }
-
- /*
- * no recovery flag requires a read-only mount
- */
- if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
- !(mp->m_flags & XFS_MOUNT_RDONLY)) {
- xfs_warn(mp, "no-recovery mounts must be read-only.");
- return EINVAL;
- }
-
- if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
- xfs_warn(mp,
- "sunit and swidth options incompatible with the noalign option");
- return EINVAL;
- }
-
- if ((mp->m_flags & XFS_MOUNT_DISCARD) &&
- !(mp->m_flags & XFS_MOUNT_DELAYLOG)) {
- xfs_warn(mp,
- "the discard option is incompatible with the nodelaylog option");
- return EINVAL;
- }
-
-#ifndef CONFIG_XFS_QUOTA
- if (XFS_IS_QUOTA_RUNNING(mp)) {
- xfs_warn(mp, "quota support not available in this kernel.");
- return EINVAL;
- }
-#endif
-
- if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
- (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
- xfs_warn(mp, "cannot mount with both project and group quota");
- return EINVAL;
- }
-
- if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
- xfs_warn(mp, "sunit and swidth must be specified together");
- return EINVAL;
- }
-
- if (dsunit && (dswidth % dsunit != 0)) {
- xfs_warn(mp,
- "stripe width (%d) must be a multiple of the stripe unit (%d)",
- dswidth, dsunit);
- return EINVAL;
- }
-
-done:
- if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
- /*
- * At this point the superblock has not been read
- * in, therefore we do not know the block size.
- * Before the mount call ends we will convert
- * these to FSBs.
- */
- if (dsunit) {
- mp->m_dalign = dsunit;
- mp->m_flags |= XFS_MOUNT_RETERR;
- }
-
- if (dswidth)
- mp->m_swidth = dswidth;
- }
-
- if (mp->m_logbufs != -1 &&
- mp->m_logbufs != 0 &&
- (mp->m_logbufs < XLOG_MIN_ICLOGS ||
- mp->m_logbufs > XLOG_MAX_ICLOGS)) {
- xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
- mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
- return XFS_ERROR(EINVAL);
- }
- if (mp->m_logbsize != -1 &&
- mp->m_logbsize != 0 &&
- (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
- mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
- !is_power_of_2(mp->m_logbsize))) {
- xfs_warn(mp,
- "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
- mp->m_logbsize);
- return XFS_ERROR(EINVAL);
- }
-
- if (iosizelog) {
- if (iosizelog > XFS_MAX_IO_LOG ||
- iosizelog < XFS_MIN_IO_LOG) {
- xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
- iosizelog, XFS_MIN_IO_LOG,
- XFS_MAX_IO_LOG);
- return XFS_ERROR(EINVAL);
- }
-
- mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
- mp->m_readio_log = iosizelog;
- mp->m_writeio_log = iosizelog;
- }
-
- return 0;
-}
-
-struct proc_xfs_info {
- int flag;
- char *str;
-};
-
-STATIC int
-xfs_showargs(
- struct xfs_mount *mp,
- struct seq_file *m)
-{
- static struct proc_xfs_info xfs_info_set[] = {
- /* the few simple ones we can get from the mount struct */
- { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
- { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
- { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
- { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
- { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
- { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
- { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
- { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
- { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
- { XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
- { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
- { 0, NULL }
- };
- static struct proc_xfs_info xfs_info_unset[] = {
- /* the few simple ones we can get from the mount struct */
- { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
- { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
- { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
- { 0, NULL }
- };
- struct proc_xfs_info *xfs_infop;
-
- for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
- if (mp->m_flags & xfs_infop->flag)
- seq_puts(m, xfs_infop->str);
- }
- for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
- if (!(mp->m_flags & xfs_infop->flag))
- seq_puts(m, xfs_infop->str);
- }
-
- if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
- seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
- (int)(1 << mp->m_writeio_log) >> 10);
-
- if (mp->m_logbufs > 0)
- seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
- if (mp->m_logbsize > 0)
- seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
-
- if (mp->m_logname)
- seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
- if (mp->m_rtname)
- seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
-
- if (mp->m_dalign > 0)
- seq_printf(m, "," MNTOPT_SUNIT "=%d",
- (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
- if (mp->m_swidth > 0)
- seq_printf(m, "," MNTOPT_SWIDTH "=%d",
- (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
-
- if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
- seq_puts(m, "," MNTOPT_USRQUOTA);
- else if (mp->m_qflags & XFS_UQUOTA_ACCT)
- seq_puts(m, "," MNTOPT_UQUOTANOENF);
-
- /* Either project or group quotas can be active, not both */
-
- if (mp->m_qflags & XFS_PQUOTA_ACCT) {
- if (mp->m_qflags & XFS_OQUOTA_ENFD)
- seq_puts(m, "," MNTOPT_PRJQUOTA);
- else
- seq_puts(m, "," MNTOPT_PQUOTANOENF);
- } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
- if (mp->m_qflags & XFS_OQUOTA_ENFD)
- seq_puts(m, "," MNTOPT_GRPQUOTA);
- else
- seq_puts(m, "," MNTOPT_GQUOTANOENF);
- }
-
- if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
- seq_puts(m, "," MNTOPT_NOQUOTA);
-
- return 0;
-}
-__uint64_t
-xfs_max_file_offset(
- unsigned int blockshift)
-{
- unsigned int pagefactor = 1;
- unsigned int bitshift = BITS_PER_LONG - 1;
-
- /* Figure out maximum filesize, on Linux this can depend on
- * the filesystem blocksize (on 32 bit platforms).
- * __block_write_begin does this in an [unsigned] long...
- * page->index << (PAGE_CACHE_SHIFT - bbits)
- * So, for page sized blocks (4K on 32 bit platforms),
- * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
- * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
- * but for smaller blocksizes it is less (bbits = log2 bsize).
- * Note1: get_block_t takes a long (implicit cast from above)
- * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
- * can optionally convert the [unsigned] long from above into
- * an [unsigned] long long.
- */
-
-#if BITS_PER_LONG == 32
-# if defined(CONFIG_LBDAF)
- ASSERT(sizeof(sector_t) == 8);
- pagefactor = PAGE_CACHE_SIZE;
- bitshift = BITS_PER_LONG;
-# else
- pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
-# endif
-#endif
-
- return (((__uint64_t)pagefactor) << bitshift) - 1;
-}
-
-STATIC int
-xfs_blkdev_get(
- xfs_mount_t *mp,
- const char *name,
- struct block_device **bdevp)
-{
- int error = 0;
-
- *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
- mp);
- if (IS_ERR(*bdevp)) {
- error = PTR_ERR(*bdevp);
- xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
- }
-
- return -error;
-}
-
-STATIC void
-xfs_blkdev_put(
- struct block_device *bdev)
-{
- if (bdev)
- blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-}
-
-void
-xfs_blkdev_issue_flush(
- xfs_buftarg_t *buftarg)
-{
- blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
-}
-
-STATIC void
-xfs_close_devices(
- struct xfs_mount *mp)
-{
- if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
- struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
- xfs_free_buftarg(mp, mp->m_logdev_targp);
- xfs_blkdev_put(logdev);
- }
- if (mp->m_rtdev_targp) {
- struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
- xfs_free_buftarg(mp, mp->m_rtdev_targp);
- xfs_blkdev_put(rtdev);
- }
- xfs_free_buftarg(mp, mp->m_ddev_targp);
-}
-
-/*
- * The file system configurations are:
- * (1) device (partition) with data and internal log
- * (2) logical volume with data and log subvolumes.
- * (3) logical volume with data, log, and realtime subvolumes.
- *
- * We only have to handle opening the log and realtime volumes here if
- * they are present. The data subvolume has already been opened by
- * get_sb_bdev() and is stored in sb->s_bdev.
- */
-STATIC int
-xfs_open_devices(
- struct xfs_mount *mp)
-{
- struct block_device *ddev = mp->m_super->s_bdev;
- struct block_device *logdev = NULL, *rtdev = NULL;
- int error;
-
- /*
- * Open real time and log devices - order is important.
- */
- if (mp->m_logname) {
- error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
- if (error)
- goto out;
- }
-
- if (mp->m_rtname) {
- error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
- if (error)
- goto out_close_logdev;
-
- if (rtdev == ddev || rtdev == logdev) {
- xfs_warn(mp,
- "Cannot mount filesystem with identical rtdev and ddev/logdev.");
- error = EINVAL;
- goto out_close_rtdev;
- }
- }
-
- /*
- * Setup xfs_mount buffer target pointers
- */
- error = ENOMEM;
- mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
- if (!mp->m_ddev_targp)
- goto out_close_rtdev;
-
- if (rtdev) {
- mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
- mp->m_fsname);
- if (!mp->m_rtdev_targp)
- goto out_free_ddev_targ;
- }
-
- if (logdev && logdev != ddev) {
- mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
- mp->m_fsname);
- if (!mp->m_logdev_targp)
- goto out_free_rtdev_targ;
- } else {
- mp->m_logdev_targp = mp->m_ddev_targp;
- }
-
- return 0;
-
- out_free_rtdev_targ:
- if (mp->m_rtdev_targp)
- xfs_free_buftarg(mp, mp->m_rtdev_targp);
- out_free_ddev_targ:
- xfs_free_buftarg(mp, mp->m_ddev_targp);
- out_close_rtdev:
- if (rtdev)
- xfs_blkdev_put(rtdev);
- out_close_logdev:
- if (logdev && logdev != ddev)
- xfs_blkdev_put(logdev);
- out:
- return error;
-}
-
-/*
- * Setup xfs_mount buffer target pointers based on superblock
- */
-STATIC int
-xfs_setup_devices(
- struct xfs_mount *mp)
-{
- int error;
-
- error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
- mp->m_sb.sb_sectsize);
- if (error)
- return error;
-
- if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
- unsigned int log_sector_size = BBSIZE;
-
- if (xfs_sb_version_hassector(&mp->m_sb))
- log_sector_size = mp->m_sb.sb_logsectsize;
- error = xfs_setsize_buftarg(mp->m_logdev_targp,
- mp->m_sb.sb_blocksize,
- log_sector_size);
- if (error)
- return error;
- }
- if (mp->m_rtdev_targp) {
- error = xfs_setsize_buftarg(mp->m_rtdev_targp,
- mp->m_sb.sb_blocksize,
- mp->m_sb.sb_sectsize);
- if (error)
- return error;
- }
-
- return 0;
-}
-
-/* Catch misguided souls that try to use this interface on XFS */
-STATIC struct inode *
-xfs_fs_alloc_inode(
- struct super_block *sb)
-{
- BUG();
- return NULL;
-}
-
-/*
- * Now that the generic code is guaranteed not to be accessing
- * the linux inode, we can reclaim the inode.
- */
-STATIC void
-xfs_fs_destroy_inode(
- struct inode *inode)
-{
- struct xfs_inode *ip = XFS_I(inode);
-
- trace_xfs_destroy_inode(ip);
-
- XFS_STATS_INC(vn_reclaim);
-
- /* bad inode, get out here ASAP */
- if (is_bad_inode(inode))
- goto out_reclaim;
-
- xfs_ioend_wait(ip);
-
- ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
-
- /*
- * We should never get here with one of the reclaim flags already set.
- */
- ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
- ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
-
- /*
- * We always use background reclaim here because even if the
- * inode is clean, it still may be under IO and hence we have
- * to take the flush lock. The background reclaim path handles
- * this more efficiently than we can here, so simply let background
- * reclaim tear down all inodes.
- */
-out_reclaim:
- xfs_inode_set_reclaim_tag(ip);
-}
-
-/*
- * Slab object creation initialisation for the XFS inode.
- * This covers only the idempotent fields in the XFS inode;
- * all other fields need to be initialised on allocation
- * from the slab. This avoids the need to repeatedly initialise
- * fields in the xfs inode that left in the initialise state
- * when freeing the inode.
- */
-STATIC void
-xfs_fs_inode_init_once(
- void *inode)
-{
- struct xfs_inode *ip = inode;
-
- memset(ip, 0, sizeof(struct xfs_inode));
-
- /* vfs inode */
- inode_init_once(VFS_I(ip));
-
- /* xfs inode */
- atomic_set(&ip->i_iocount, 0);
- atomic_set(&ip->i_pincount, 0);
- spin_lock_init(&ip->i_flags_lock);
- init_waitqueue_head(&ip->i_ipin_wait);
- /*
- * Because we want to use a counting completion, complete
- * the flush completion once to allow a single access to
- * the flush completion without blocking.
- */
- init_completion(&ip->i_flush);
- complete(&ip->i_flush);
-
- mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
- "xfsino", ip->i_ino);
-}
-
-/*
- * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
- * we catch unlogged VFS level updates to the inode.
- *
- * We need the barrier() to maintain correct ordering between unlogged
- * updates and the transaction commit code that clears the i_update_core
- * field. This requires all updates to be completed before marking the
- * inode dirty.
- */
-STATIC void
-xfs_fs_dirty_inode(
- struct inode *inode,
- int flags)
-{
- barrier();
- XFS_I(inode)->i_update_core = 1;
-}
-
-STATIC int
-xfs_log_inode(
- struct xfs_inode *ip)
-{
- struct xfs_mount *mp = ip->i_mount;
- struct xfs_trans *tp;
- int error;
-
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
- error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
-
- if (error) {
- xfs_trans_cancel(tp, 0);
- /* we need to return with the lock hold shared */
- xfs_ilock(ip, XFS_ILOCK_SHARED);
- return error;
- }
-
- xfs_ilock(ip, XFS_ILOCK_EXCL);
-
- /*
- * Note - it's possible that we might have pushed ourselves out of the
- * way during trans_reserve which would flush the inode. But there's
- * no guarantee that the inode buffer has actually gone out yet (it's
- * delwri). Plus the buffer could be pinned anyway if it's part of
- * an inode in another recent transaction. So we play it safe and
- * fire off the transaction anyway.
- */
- xfs_trans_ijoin(tp, ip);
- xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- error = xfs_trans_commit(tp, 0);
- xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
-
- return error;
-}
-
-STATIC int
-xfs_fs_write_inode(
- struct inode *inode,
- struct writeback_control *wbc)
-{
- struct xfs_inode *ip = XFS_I(inode);
- struct xfs_mount *mp = ip->i_mount;
- int error = EAGAIN;
-
- trace_xfs_write_inode(ip);
-
- if (XFS_FORCED_SHUTDOWN(mp))
- return XFS_ERROR(EIO);
-
- if (wbc->sync_mode == WB_SYNC_ALL) {
- /*
- * Make sure the inode has made it it into the log. Instead
- * of forcing it all the way to stable storage using a
- * synchronous transaction we let the log force inside the
- * ->sync_fs call do that for thus, which reduces the number
- * of synchronous log foces dramatically.
- */
- xfs_ioend_wait(ip);
- xfs_ilock(ip, XFS_ILOCK_SHARED);
- if (ip->i_update_core) {
- error = xfs_log_inode(ip);
- if (error)
- goto out_unlock;
- }
- } else {
- /*
- * We make this non-blocking if the inode is contended, return
- * EAGAIN to indicate to the caller that they did not succeed.
- * This prevents the flush path from blocking on inodes inside
- * another operation right now, they get caught later by
- * xfs_sync.
- */
- if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
- goto out;
-
- if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
- goto out_unlock;
-
- /*
- * Now we have the flush lock and the inode is not pinned, we
- * can check if the inode is really clean as we know that
- * there are no pending transaction completions, it is not
- * waiting on the delayed write queue and there is no IO in
- * progress.
- */
- if (xfs_inode_clean(ip)) {
- xfs_ifunlock(ip);
- error = 0;
- goto out_unlock;
- }
- error = xfs_iflush(ip, SYNC_TRYLOCK);
- }
-
- out_unlock:
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- out:
- /*
- * if we failed to write out the inode then mark
- * it dirty again so we'll try again later.
- */
- if (error)
- xfs_mark_inode_dirty_sync(ip);
- return -error;
-}
-
-STATIC void
-xfs_fs_evict_inode(
- struct inode *inode)
-{
- xfs_inode_t *ip = XFS_I(inode);
-
- trace_xfs_evict_inode(ip);
-
- truncate_inode_pages(&inode->i_data, 0);
- end_writeback(inode);
- XFS_STATS_INC(vn_rele);
- XFS_STATS_INC(vn_remove);
- XFS_STATS_DEC(vn_active);
-
- /*
- * The iolock is used by the file system to coordinate reads,
- * writes, and block truncates. Up to this point the lock
- * protected concurrent accesses by users of the inode. But
- * from here forward we're doing some final processing of the
- * inode because we're done with it, and although we reuse the
- * iolock for protection it is really a distinct lock class
- * (in the lockdep sense) from before. To keep lockdep happy
- * (and basically indicate what we are doing), we explicitly
- * re-init the iolock here.
- */
- ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
- mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
- lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
- &xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
-
- xfs_inactive(ip);
-}
-
-STATIC void
-xfs_free_fsname(
- struct xfs_mount *mp)
-{
- kfree(mp->m_fsname);
- kfree(mp->m_rtname);
- kfree(mp->m_logname);
-}
-
-STATIC void
-xfs_fs_put_super(
- struct super_block *sb)
-{
- struct xfs_mount *mp = XFS_M(sb);
-
- xfs_syncd_stop(mp);
-
- /*
- * Blow away any referenced inode in the filestreams cache.
- * This can and will cause log traffic as inodes go inactive
- * here.
- */
- xfs_filestream_unmount(mp);
-
- XFS_bflush(mp->m_ddev_targp);
-
- xfs_unmountfs(mp);
- xfs_freesb(mp);
- xfs_icsb_destroy_counters(mp);
- xfs_close_devices(mp);
- xfs_free_fsname(mp);
- kfree(mp);
-}
-
-STATIC int
-xfs_fs_sync_fs(
- struct super_block *sb,
- int wait)
-{
- struct xfs_mount *mp = XFS_M(sb);
- int error;
-
- /*
- * Not much we can do for the first async pass. Writing out the
- * superblock would be counter-productive as we are going to redirty
- * when writing out other data and metadata (and writing out a single
- * block is quite fast anyway).
- *
- * Try to asynchronously kick off quota syncing at least.
- */
- if (!wait) {
- xfs_qm_sync(mp, SYNC_TRYLOCK);
- return 0;
- }
-
- error = xfs_quiesce_data(mp);
- if (error)
- return -error;
-
- if (laptop_mode) {
- /*
- * The disk must be active because we're syncing.
- * We schedule xfssyncd now (now that the disk is
- * active) instead of later (when it might not be).
- */
- flush_delayed_work_sync(&mp->m_sync_work);
- }
-
- return 0;
-}
-
-STATIC int
-xfs_fs_statfs(
- struct dentry *dentry,
- struct kstatfs *statp)
-{
- struct xfs_mount *mp = XFS_M(dentry->d_sb);
- xfs_sb_t *sbp = &mp->m_sb;
- struct xfs_inode *ip = XFS_I(dentry->d_inode);
- __uint64_t fakeinos, id;
- xfs_extlen_t lsize;
- __int64_t ffree;
-
- statp->f_type = XFS_SB_MAGIC;
- statp->f_namelen = MAXNAMELEN - 1;
-
- id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
- statp->f_fsid.val[0] = (u32)id;
- statp->f_fsid.val[1] = (u32)(id >> 32);
-
- xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
-
- spin_lock(&mp->m_sb_lock);
- statp->f_bsize = sbp->sb_blocksize;
- lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
- statp->f_blocks = sbp->sb_dblocks - lsize;
- statp->f_bfree = statp->f_bavail =
- sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
- fakeinos = statp->f_bfree << sbp->sb_inopblog;
- statp->f_files =
- MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
- if (mp->m_maxicount)
- statp->f_files = min_t(typeof(statp->f_files),
- statp->f_files,
- mp->m_maxicount);
-
- /* make sure statp->f_ffree does not underflow */
- ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
- statp->f_ffree = max_t(__int64_t, ffree, 0);
-
- spin_unlock(&mp->m_sb_lock);
-
- if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
- ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
- (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
- xfs_qm_statvfs(ip, statp);
- return 0;
-}
-
-STATIC void
-xfs_save_resvblks(struct xfs_mount *mp)
-{
- __uint64_t resblks = 0;
-
- mp->m_resblks_save = mp->m_resblks;
- xfs_reserve_blocks(mp, &resblks, NULL);
-}
-
-STATIC void
-xfs_restore_resvblks(struct xfs_mount *mp)
-{
- __uint64_t resblks;
-
- if (mp->m_resblks_save) {
- resblks = mp->m_resblks_save;
- mp->m_resblks_save = 0;
- } else
- resblks = xfs_default_resblks(mp);
-
- xfs_reserve_blocks(mp, &resblks, NULL);
-}
-
-STATIC int
-xfs_fs_remount(
- struct super_block *sb,
- int *flags,
- char *options)
-{
- struct xfs_mount *mp = XFS_M(sb);
- substring_t args[MAX_OPT_ARGS];
- char *p;
- int error;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_barrier:
- mp->m_flags |= XFS_MOUNT_BARRIER;
- break;
- case Opt_nobarrier:
- mp->m_flags &= ~XFS_MOUNT_BARRIER;
- break;
- default:
- /*
- * Logically we would return an error here to prevent
- * users from believing they might have changed
- * mount options using remount which can't be changed.
- *
- * But unfortunately mount(8) adds all options from
- * mtab and fstab to the mount arguments in some cases
- * so we can't blindly reject options, but have to
- * check for each specified option if it actually
- * differs from the currently set option and only
- * reject it if that's the case.
- *
- * Until that is implemented we return success for
- * every remount request, and silently ignore all
- * options that we can't actually change.
- */
-#if 0
- xfs_info(mp,
- "mount option \"%s\" not supported for remount\n", p);
- return -EINVAL;
-#else
- break;
-#endif
- }
- }
-
- /* ro -> rw */
- if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
- mp->m_flags &= ~XFS_MOUNT_RDONLY;
-
- /*
- * If this is the first remount to writeable state we
- * might have some superblock changes to update.
- */
- if (mp->m_update_flags) {
- error = xfs_mount_log_sb(mp, mp->m_update_flags);
- if (error) {
- xfs_warn(mp, "failed to write sb changes");
- return error;
- }
- mp->m_update_flags = 0;
- }
-
- /*
- * Fill out the reserve pool if it is empty. Use the stashed
- * value if it is non-zero, otherwise go with the default.
- */
- xfs_restore_resvblks(mp);
- }
-
- /* rw -> ro */
- if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
- /*
- * After we have synced the data but before we sync the
- * metadata, we need to free up the reserve block pool so that
- * the used block count in the superblock on disk is correct at
- * the end of the remount. Stash the current reserve pool size
- * so that if we get remounted rw, we can return it to the same
- * size.
- */
-
- xfs_quiesce_data(mp);
- xfs_save_resvblks(mp);
- xfs_quiesce_attr(mp);
- mp->m_flags |= XFS_MOUNT_RDONLY;
- }
-
- return 0;
-}
-
-/*
- * Second stage of a freeze. The data is already frozen so we only
- * need to take care of the metadata. Once that's done write a dummy
- * record to dirty the log in case of a crash while frozen.
- */
-STATIC int
-xfs_fs_freeze(
- struct super_block *sb)
-{
- struct xfs_mount *mp = XFS_M(sb);
-
- xfs_save_resvblks(mp);
- xfs_quiesce_attr(mp);
- return -xfs_fs_log_dummy(mp);
-}
-
-STATIC int
-xfs_fs_unfreeze(
- struct super_block *sb)
-{
- struct xfs_mount *mp = XFS_M(sb);
-
- xfs_restore_resvblks(mp);
- return 0;
-}
-
-STATIC int
-xfs_fs_show_options(
- struct seq_file *m,
- struct vfsmount *mnt)
-{
- return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
-}
-
-/*
- * This function fills in xfs_mount_t fields based on mount args.
- * Note: the superblock _has_ now been read in.
- */
-STATIC int
-xfs_finish_flags(
- struct xfs_mount *mp)
-{
- int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
-
- /* Fail a mount where the logbuf is smaller than the log stripe */
- if (xfs_sb_version_haslogv2(&mp->m_sb)) {
- if (mp->m_logbsize <= 0 &&
- mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
- mp->m_logbsize = mp->m_sb.sb_logsunit;
- } else if (mp->m_logbsize > 0 &&
- mp->m_logbsize < mp->m_sb.sb_logsunit) {
- xfs_warn(mp,
- "logbuf size must be greater than or equal to log stripe size");
- return XFS_ERROR(EINVAL);
- }
- } else {
- /* Fail a mount if the logbuf is larger than 32K */
- if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
- xfs_warn(mp,
- "logbuf size for version 1 logs must be 16K or 32K");
- return XFS_ERROR(EINVAL);
- }
- }
-
- /*
- * mkfs'ed attr2 will turn on attr2 mount unless explicitly
- * told by noattr2 to turn it off
- */
- if (xfs_sb_version_hasattr2(&mp->m_sb) &&
- !(mp->m_flags & XFS_MOUNT_NOATTR2))
- mp->m_flags |= XFS_MOUNT_ATTR2;
-
- /*
- * prohibit r/w mounts of read-only filesystems
- */
- if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
- xfs_warn(mp,
- "cannot mount a read-only filesystem as read-write");
- return XFS_ERROR(EROFS);
- }
-
- return 0;
-}
-
-STATIC int
-xfs_fs_fill_super(
- struct super_block *sb,
- void *data,
- int silent)
-{
- struct inode *root;
- struct xfs_mount *mp = NULL;
- int flags = 0, error = ENOMEM;
-
- mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
- if (!mp)
- goto out;
-
- spin_lock_init(&mp->m_sb_lock);
- mutex_init(&mp->m_growlock);
- atomic_set(&mp->m_active_trans, 0);
-
- mp->m_super = sb;
- sb->s_fs_info = mp;
-
- error = xfs_parseargs(mp, (char *)data);
- if (error)
- goto out_free_fsname;
-
- sb_min_blocksize(sb, BBSIZE);
- sb->s_xattr = xfs_xattr_handlers;
- sb->s_export_op = &xfs_export_operations;
-#ifdef CONFIG_XFS_QUOTA
- sb->s_qcop = &xfs_quotactl_operations;
-#endif
- sb->s_op = &xfs_super_operations;
-
- if (silent)
- flags |= XFS_MFSI_QUIET;
-
- error = xfs_open_devices(mp);
- if (error)
- goto out_free_fsname;
-
- error = xfs_icsb_init_counters(mp);
- if (error)
- goto out_close_devices;
-
- error = xfs_readsb(mp, flags);
- if (error)
- goto out_destroy_counters;
-
- error = xfs_finish_flags(mp);
- if (error)
- goto out_free_sb;
-
- error = xfs_setup_devices(mp);
- if (error)
- goto out_free_sb;
-
- error = xfs_filestream_mount(mp);
- if (error)
- goto out_free_sb;
-
- /*
- * we must configure the block size in the superblock before we run the
- * full mount process as the mount process can lookup and cache inodes.
- * For the same reason we must also initialise the syncd and register
- * the inode cache shrinker so that inodes can be reclaimed during
- * operations like a quotacheck that iterate all inodes in the
- * filesystem.
- */
- sb->s_magic = XFS_SB_MAGIC;
- sb->s_blocksize = mp->m_sb.sb_blocksize;
- sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
- sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
- sb->s_time_gran = 1;
- set_posix_acl_flag(sb);
-
- error = xfs_mountfs(mp);
- if (error)
- goto out_filestream_unmount;
-
- error = xfs_syncd_init(mp);
- if (error)
- goto out_unmount;
-
- root = igrab(VFS_I(mp->m_rootip));
- if (!root) {
- error = ENOENT;
- goto out_syncd_stop;
- }
- if (is_bad_inode(root)) {
- error = EINVAL;
- goto out_syncd_stop;
- }
- sb->s_root = d_alloc_root(root);
- if (!sb->s_root) {
- error = ENOMEM;
- goto out_iput;
- }
-
- return 0;
-
- out_filestream_unmount:
- xfs_filestream_unmount(mp);
- out_free_sb:
- xfs_freesb(mp);
- out_destroy_counters:
- xfs_icsb_destroy_counters(mp);
- out_close_devices:
- xfs_close_devices(mp);
- out_free_fsname:
- xfs_free_fsname(mp);
- kfree(mp);
- out:
- return -error;
-
- out_iput:
- iput(root);
- out_syncd_stop:
- xfs_syncd_stop(mp);
- out_unmount:
- /*
- * Blow away any referenced inode in the filestreams cache.
- * This can and will cause log traffic as inodes go inactive
- * here.
- */
- xfs_filestream_unmount(mp);
-
- XFS_bflush(mp->m_ddev_targp);
-
- xfs_unmountfs(mp);
- goto out_free_sb;
-}
-
-STATIC struct dentry *
-xfs_fs_mount(
- struct file_system_type *fs_type,
- int flags,
- const char *dev_name,
- void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
-}
-
-static int
-xfs_fs_nr_cached_objects(
- struct super_block *sb)
-{
- return xfs_reclaim_inodes_count(XFS_M(sb));
-}
-
-static void
-xfs_fs_free_cached_objects(
- struct super_block *sb,
- int nr_to_scan)
-{
- xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
-}
-
-static const struct super_operations xfs_super_operations = {
- .alloc_inode = xfs_fs_alloc_inode,
- .destroy_inode = xfs_fs_destroy_inode,
- .dirty_inode = xfs_fs_dirty_inode,
- .write_inode = xfs_fs_write_inode,
- .evict_inode = xfs_fs_evict_inode,
- .put_super = xfs_fs_put_super,
- .sync_fs = xfs_fs_sync_fs,
- .freeze_fs = xfs_fs_freeze,
- .unfreeze_fs = xfs_fs_unfreeze,
- .statfs = xfs_fs_statfs,
- .remount_fs = xfs_fs_remount,
- .show_options = xfs_fs_show_options,
- .nr_cached_objects = xfs_fs_nr_cached_objects,
- .free_cached_objects = xfs_fs_free_cached_objects,
-};
-
-static struct file_system_type xfs_fs_type = {
- .owner = THIS_MODULE,
- .name = "xfs",
- .mount = xfs_fs_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-
-STATIC int __init
-xfs_init_zones(void)
-{
-
- xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
- if (!xfs_ioend_zone)
- goto out;
-
- xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
- xfs_ioend_zone);
- if (!xfs_ioend_pool)
- goto out_destroy_ioend_zone;
-
- xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
- "xfs_log_ticket");
- if (!xfs_log_ticket_zone)
- goto out_destroy_ioend_pool;
-
- xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
- "xfs_bmap_free_item");
- if (!xfs_bmap_free_item_zone)
- goto out_destroy_log_ticket_zone;
-
- xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
- "xfs_btree_cur");
- if (!xfs_btree_cur_zone)
- goto out_destroy_bmap_free_item_zone;
-
- xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
- "xfs_da_state");
- if (!xfs_da_state_zone)
- goto out_destroy_btree_cur_zone;
-
- xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
- if (!xfs_dabuf_zone)
- goto out_destroy_da_state_zone;
-
- xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
- if (!xfs_ifork_zone)
- goto out_destroy_dabuf_zone;
-
- xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
- if (!xfs_trans_zone)
- goto out_destroy_ifork_zone;
-
- xfs_log_item_desc_zone =
- kmem_zone_init(sizeof(struct xfs_log_item_desc),
- "xfs_log_item_desc");
- if (!xfs_log_item_desc_zone)
- goto out_destroy_trans_zone;
-
- /*
- * The size of the zone allocated buf log item is the maximum
- * size possible under XFS. This wastes a little bit of memory,
- * but it is much faster.
- */
- xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
- (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
- NBWORD) * sizeof(int))), "xfs_buf_item");
- if (!xfs_buf_item_zone)
- goto out_destroy_log_item_desc_zone;
-
- xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
- ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
- sizeof(xfs_extent_t))), "xfs_efd_item");
- if (!xfs_efd_zone)
- goto out_destroy_buf_item_zone;
-
- xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
- ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
- sizeof(xfs_extent_t))), "xfs_efi_item");
- if (!xfs_efi_zone)
- goto out_destroy_efd_zone;
-
- xfs_inode_zone =
- kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
- KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
- xfs_fs_inode_init_once);
- if (!xfs_inode_zone)
- goto out_destroy_efi_zone;
-
- xfs_ili_zone =
- kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
- KM_ZONE_SPREAD, NULL);
- if (!xfs_ili_zone)
- goto out_destroy_inode_zone;
-
- return 0;
-
- out_destroy_inode_zone:
- kmem_zone_destroy(xfs_inode_zone);
- out_destroy_efi_zone:
- kmem_zone_destroy(xfs_efi_zone);
- out_destroy_efd_zone:
- kmem_zone_destroy(xfs_efd_zone);
- out_destroy_buf_item_zone:
- kmem_zone_destroy(xfs_buf_item_zone);
- out_destroy_log_item_desc_zone:
- kmem_zone_destroy(xfs_log_item_desc_zone);
- out_destroy_trans_zone:
- kmem_zone_destroy(xfs_trans_zone);
- out_destroy_ifork_zone:
- kmem_zone_destroy(xfs_ifork_zone);
- out_destroy_dabuf_zone:
- kmem_zone_destroy(xfs_dabuf_zone);
- out_destroy_da_state_zone:
- kmem_zone_destroy(xfs_da_state_zone);
- out_destroy_btree_cur_zone:
- kmem_zone_destroy(xfs_btree_cur_zone);
- out_destroy_bmap_free_item_zone:
- kmem_zone_destroy(xfs_bmap_free_item_zone);
- out_destroy_log_ticket_zone:
- kmem_zone_destroy(xfs_log_ticket_zone);
- out_destroy_ioend_pool:
- mempool_destroy(xfs_ioend_pool);
- out_destroy_ioend_zone:
- kmem_zone_destroy(xfs_ioend_zone);
- out:
- return -ENOMEM;
-}
-
-STATIC void
-xfs_destroy_zones(void)
-{
- kmem_zone_destroy(xfs_ili_zone);
- kmem_zone_destroy(xfs_inode_zone);
- kmem_zone_destroy(xfs_efi_zone);
- kmem_zone_destroy(xfs_efd_zone);
- kmem_zone_destroy(xfs_buf_item_zone);
- kmem_zone_destroy(xfs_log_item_desc_zone);
- kmem_zone_destroy(xfs_trans_zone);
- kmem_zone_destroy(xfs_ifork_zone);
- kmem_zone_destroy(xfs_dabuf_zone);
- kmem_zone_destroy(xfs_da_state_zone);
- kmem_zone_destroy(xfs_btree_cur_zone);
- kmem_zone_destroy(xfs_bmap_free_item_zone);
- kmem_zone_destroy(xfs_log_ticket_zone);
- mempool_destroy(xfs_ioend_pool);
- kmem_zone_destroy(xfs_ioend_zone);
-
-}
-
-STATIC int __init
-xfs_init_workqueues(void)
-{
- /*
- * max_active is set to 8 to give enough concurency to allow
- * multiple work operations on each CPU to run. This allows multiple
- * filesystems to be running sync work concurrently, and scales with
- * the number of CPUs in the system.
- */
- xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
- if (!xfs_syncd_wq)
- goto out;
-
- xfs_ail_wq = alloc_workqueue("xfsail", WQ_CPU_INTENSIVE, 8);
- if (!xfs_ail_wq)
- goto out_destroy_syncd;
-
- return 0;
-
-out_destroy_syncd:
- destroy_workqueue(xfs_syncd_wq);
-out:
- return -ENOMEM;
-}
-
-STATIC void
-xfs_destroy_workqueues(void)
-{
- destroy_workqueue(xfs_ail_wq);
- destroy_workqueue(xfs_syncd_wq);
-}
-
-STATIC int __init
-init_xfs_fs(void)
-{
- int error;
-
- printk(KERN_INFO XFS_VERSION_STRING " with "
- XFS_BUILD_OPTIONS " enabled\n");
-
- xfs_ioend_init();
- xfs_dir_startup();
-
- error = xfs_init_zones();
- if (error)
- goto out;
-
- error = xfs_init_workqueues();
- if (error)
- goto out_destroy_zones;
-
- error = xfs_mru_cache_init();
- if (error)
- goto out_destroy_wq;
-
- error = xfs_filestream_init();
- if (error)
- goto out_mru_cache_uninit;
-
- error = xfs_buf_init();
- if (error)
- goto out_filestream_uninit;
-
- error = xfs_init_procfs();
- if (error)
- goto out_buf_terminate;
-
- error = xfs_sysctl_register();
- if (error)
- goto out_cleanup_procfs;
-
- vfs_initquota();
-
- error = register_filesystem(&xfs_fs_type);
- if (error)
- goto out_sysctl_unregister;
- return 0;
-
- out_sysctl_unregister:
- xfs_sysctl_unregister();
- out_cleanup_procfs:
- xfs_cleanup_procfs();
- out_buf_terminate:
- xfs_buf_terminate();
- out_filestream_uninit:
- xfs_filestream_uninit();
- out_mru_cache_uninit:
- xfs_mru_cache_uninit();
- out_destroy_wq:
- xfs_destroy_workqueues();
- out_destroy_zones:
- xfs_destroy_zones();
- out:
- return error;
-}
-
-STATIC void __exit
-exit_xfs_fs(void)
-{
- vfs_exitquota();
- unregister_filesystem(&xfs_fs_type);
- xfs_sysctl_unregister();
- xfs_cleanup_procfs();
- xfs_buf_terminate();
- xfs_filestream_uninit();
- xfs_mru_cache_uninit();
- xfs_destroy_workqueues();
- xfs_destroy_zones();
-}
-
-module_init(init_xfs_fs);
-module_exit(exit_xfs_fs);
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
-MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / blobdiff