forked from luck/tmp_suning_uos_patched
8f639ddea0
Add an in-memory only flag to say we logged timestamps only, and use it to check if fdatasync can optimize away the log force. Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
1702 lines
45 KiB
C
1702 lines
45 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_fsops.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_utils.h"
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#include "xfs_vnodeops.h"
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#include "xfs_log_priv.h"
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#include "xfs_trans_priv.h"
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#include "xfs_filestream.h"
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#include "xfs_da_btree.h"
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#include "xfs_extfree_item.h"
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#include "xfs_mru_cache.h"
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#include "xfs_inode_item.h"
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#include "xfs_sync.h"
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#include "xfs_trace.h"
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#include <linux/namei.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/mount.h>
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#include <linux/mempool.h>
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#include <linux/writeback.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/parser.h>
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static const struct super_operations xfs_super_operations;
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static kmem_zone_t *xfs_ioend_zone;
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mempool_t *xfs_ioend_pool;
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#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
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#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
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#define MNTOPT_LOGDEV "logdev" /* log device */
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#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
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#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
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#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
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#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
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#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
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#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
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#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
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#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
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#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
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#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
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#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
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#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
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#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
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#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
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#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
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#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
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* unwritten extent conversion */
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#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
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#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
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#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
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#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
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#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
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#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
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* in stat(). */
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#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
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#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
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#define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
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#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
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#define MNTOPT_NOQUOTA "noquota" /* no quotas */
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#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
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#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
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#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
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#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
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#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
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#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
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#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
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#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
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#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
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#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
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#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
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#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
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#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
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#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
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/*
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* Table driven mount option parser.
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*
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* Currently only used for remount, but it will be used for mount
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* in the future, too.
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*/
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enum {
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Opt_barrier, Opt_nobarrier, Opt_err
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};
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static const match_table_t tokens = {
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{Opt_barrier, "barrier"},
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{Opt_nobarrier, "nobarrier"},
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{Opt_err, NULL}
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};
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STATIC unsigned long
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suffix_strtoul(char *s, char **endp, unsigned int base)
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{
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int last, shift_left_factor = 0;
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char *value = s;
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last = strlen(value) - 1;
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if (value[last] == 'K' || value[last] == 'k') {
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shift_left_factor = 10;
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value[last] = '\0';
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}
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if (value[last] == 'M' || value[last] == 'm') {
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shift_left_factor = 20;
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value[last] = '\0';
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}
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if (value[last] == 'G' || value[last] == 'g') {
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shift_left_factor = 30;
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value[last] = '\0';
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}
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return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
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}
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/*
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* This function fills in xfs_mount_t fields based on mount args.
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* Note: the superblock has _not_ yet been read in.
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*
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* Note that this function leaks the various device name allocations on
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* failure. The caller takes care of them.
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*/
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STATIC int
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xfs_parseargs(
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struct xfs_mount *mp,
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char *options)
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{
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struct super_block *sb = mp->m_super;
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char *this_char, *value, *eov;
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int dsunit = 0;
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int dswidth = 0;
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int iosize = 0;
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__uint8_t iosizelog = 0;
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/*
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* set up the mount name first so all the errors will refer to the
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* correct device.
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*/
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mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
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if (!mp->m_fsname)
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return ENOMEM;
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mp->m_fsname_len = strlen(mp->m_fsname) + 1;
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/*
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* Copy binary VFS mount flags we are interested in.
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*/
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if (sb->s_flags & MS_RDONLY)
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mp->m_flags |= XFS_MOUNT_RDONLY;
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if (sb->s_flags & MS_DIRSYNC)
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mp->m_flags |= XFS_MOUNT_DIRSYNC;
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if (sb->s_flags & MS_SYNCHRONOUS)
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mp->m_flags |= XFS_MOUNT_WSYNC;
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/*
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* Set some default flags that could be cleared by the mount option
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* parsing.
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*/
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mp->m_flags |= XFS_MOUNT_BARRIER;
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mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
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mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
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/*
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* These can be overridden by the mount option parsing.
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*/
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mp->m_logbufs = -1;
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mp->m_logbsize = -1;
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if (!options)
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goto done;
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while ((this_char = strsep(&options, ",")) != NULL) {
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if (!*this_char)
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continue;
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if ((value = strchr(this_char, '=')) != NULL)
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*value++ = 0;
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if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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mp->m_logbufs = simple_strtoul(value, &eov, 10);
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} else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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mp->m_logbsize = suffix_strtoul(value, &eov, 10);
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} else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
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if (!mp->m_logname)
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return ENOMEM;
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} else if (!strcmp(this_char, MNTOPT_MTPT)) {
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xfs_warn(mp, "%s option not allowed on this system",
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this_char);
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return EINVAL;
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} else if (!strcmp(this_char, MNTOPT_RTDEV)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
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if (!mp->m_rtname)
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return ENOMEM;
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} else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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iosize = simple_strtoul(value, &eov, 10);
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iosizelog = ffs(iosize) - 1;
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} else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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iosize = suffix_strtoul(value, &eov, 10);
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iosizelog = ffs(iosize) - 1;
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} else if (!strcmp(this_char, MNTOPT_GRPID) ||
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!strcmp(this_char, MNTOPT_BSDGROUPS)) {
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mp->m_flags |= XFS_MOUNT_GRPID;
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} else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
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!strcmp(this_char, MNTOPT_SYSVGROUPS)) {
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mp->m_flags &= ~XFS_MOUNT_GRPID;
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} else if (!strcmp(this_char, MNTOPT_WSYNC)) {
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mp->m_flags |= XFS_MOUNT_WSYNC;
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} else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
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mp->m_flags |= XFS_MOUNT_NORECOVERY;
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} else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
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mp->m_flags |= XFS_MOUNT_NOALIGN;
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} else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
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mp->m_flags |= XFS_MOUNT_SWALLOC;
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} else if (!strcmp(this_char, MNTOPT_SUNIT)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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dsunit = simple_strtoul(value, &eov, 10);
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} else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
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if (!value || !*value) {
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xfs_warn(mp, "%s option requires an argument",
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this_char);
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return EINVAL;
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}
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dswidth = simple_strtoul(value, &eov, 10);
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} else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
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mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
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#if !XFS_BIG_INUMS
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xfs_warn(mp, "%s option not allowed on this system",
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this_char);
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return EINVAL;
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#endif
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} else if (!strcmp(this_char, MNTOPT_NOUUID)) {
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mp->m_flags |= XFS_MOUNT_NOUUID;
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} else if (!strcmp(this_char, MNTOPT_BARRIER)) {
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mp->m_flags |= XFS_MOUNT_BARRIER;
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} else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
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mp->m_flags &= ~XFS_MOUNT_BARRIER;
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} else if (!strcmp(this_char, MNTOPT_IKEEP)) {
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mp->m_flags |= XFS_MOUNT_IKEEP;
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} else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
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mp->m_flags &= ~XFS_MOUNT_IKEEP;
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} else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
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mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
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} else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
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mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
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} else if (!strcmp(this_char, MNTOPT_ATTR2)) {
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mp->m_flags |= XFS_MOUNT_ATTR2;
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} else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
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mp->m_flags &= ~XFS_MOUNT_ATTR2;
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mp->m_flags |= XFS_MOUNT_NOATTR2;
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} else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
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mp->m_flags |= XFS_MOUNT_FILESTREAMS;
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} else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
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mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
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mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
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mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
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} else if (!strcmp(this_char, MNTOPT_QUOTA) ||
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!strcmp(this_char, MNTOPT_UQUOTA) ||
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!strcmp(this_char, MNTOPT_USRQUOTA)) {
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mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
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XFS_UQUOTA_ENFD);
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} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
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!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
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mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
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mp->m_qflags &= ~XFS_UQUOTA_ENFD;
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} else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
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!strcmp(this_char, MNTOPT_PRJQUOTA)) {
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mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
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XFS_OQUOTA_ENFD);
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} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
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mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
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mp->m_qflags &= ~XFS_OQUOTA_ENFD;
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} else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
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!strcmp(this_char, MNTOPT_GRPQUOTA)) {
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mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
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XFS_OQUOTA_ENFD);
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} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
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mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
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mp->m_qflags &= ~XFS_OQUOTA_ENFD;
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} else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
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xfs_warn(mp,
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"delaylog is the default now, option is deprecated.");
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} else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
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xfs_warn(mp,
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"nodelaylog support has been removed, option is deprecated.");
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} else if (!strcmp(this_char, MNTOPT_DISCARD)) {
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mp->m_flags |= XFS_MOUNT_DISCARD;
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} else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
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mp->m_flags &= ~XFS_MOUNT_DISCARD;
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} else if (!strcmp(this_char, "ihashsize")) {
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xfs_warn(mp,
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"ihashsize no longer used, option is deprecated.");
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} else if (!strcmp(this_char, "osyncisdsync")) {
|
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xfs_warn(mp,
|
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"osyncisdsync has no effect, option is deprecated.");
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} else if (!strcmp(this_char, "osyncisosync")) {
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xfs_warn(mp,
|
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"osyncisosync has no effect, option is deprecated.");
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} else if (!strcmp(this_char, "irixsgid")) {
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xfs_warn(mp,
|
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"irixsgid is now a sysctl(2) variable, option is deprecated.");
|
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} else {
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xfs_warn(mp, "unknown mount option [%s].", this_char);
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return EINVAL;
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}
|
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}
|
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|
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/*
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* no recovery flag requires a read-only mount
|
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*/
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if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
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!(mp->m_flags & XFS_MOUNT_RDONLY)) {
|
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xfs_warn(mp, "no-recovery mounts must be read-only.");
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return EINVAL;
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}
|
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|
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if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
|
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xfs_warn(mp,
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"sunit and swidth options incompatible with the noalign option");
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return EINVAL;
|
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}
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|
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#ifndef CONFIG_XFS_QUOTA
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if (XFS_IS_QUOTA_RUNNING(mp)) {
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xfs_warn(mp, "quota support not available in this kernel.");
|
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return EINVAL;
|
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}
|
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#endif
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|
|
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_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;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_init_mount_workqueues(
|
|
struct xfs_mount *mp)
|
|
{
|
|
mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
|
|
WQ_MEM_RECLAIM, 0, mp->m_fsname);
|
|
if (!mp->m_data_workqueue)
|
|
goto out;
|
|
|
|
mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
|
|
WQ_MEM_RECLAIM, 0, mp->m_fsname);
|
|
if (!mp->m_unwritten_workqueue)
|
|
goto out_destroy_data_iodone_queue;
|
|
|
|
return 0;
|
|
|
|
out_destroy_data_iodone_queue:
|
|
destroy_workqueue(mp->m_data_workqueue);
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_mount_workqueues(
|
|
struct xfs_mount *mp)
|
|
{
|
|
destroy_workqueue(mp->m_data_workqueue);
|
|
destroy_workqueue(mp->m_unwritten_workqueue);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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_pincount, 0);
|
|
spin_lock_init(&ip->i_flags_lock);
|
|
|
|
mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
|
|
"xfsino", ip->i_ino);
|
|
}
|
|
|
|
/*
|
|
* This is called by the VFS when dirtying inode metadata. This can happen
|
|
* for a few reasons, but we only care about timestamp updates, given that
|
|
* we handled the rest ourselves. In theory no other calls should happen,
|
|
* but for example generic_write_end() keeps dirtying the inode after
|
|
* updating i_size. Thus we check that the flags are exactly I_DIRTY_SYNC,
|
|
* and skip this call otherwise.
|
|
*
|
|
* We'll hopefull get a different method just for updating timestamps soon,
|
|
* at which point this hack can go away, and maybe we'll also get real
|
|
* error handling here.
|
|
*/
|
|
STATIC void
|
|
xfs_fs_dirty_inode(
|
|
struct inode *inode,
|
|
int flags)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
|
|
if (flags != I_DIRTY_SYNC)
|
|
return;
|
|
|
|
trace_xfs_dirty_inode(ip);
|
|
|
|
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);
|
|
goto trouble;
|
|
}
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
/*
|
|
* Grab all the latest timestamps from the Linux inode.
|
|
*/
|
|
ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
|
|
ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
|
|
ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
|
|
ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
|
|
ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
|
|
ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
|
|
error = xfs_trans_commit(tp, 0);
|
|
if (error)
|
|
goto trouble;
|
|
return;
|
|
|
|
trouble:
|
|
xfs_warn(mp, "failed to update timestamps for inode 0x%llx", ip->i_ino);
|
|
}
|
|
|
|
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_flush_buftarg(mp->m_ddev_targp, 1);
|
|
|
|
xfs_unmountfs(mp);
|
|
xfs_freesb(mp);
|
|
xfs_icsb_destroy_counters(mp);
|
|
xfs_destroy_mount_workqueues(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;
|
|
|
|
/*
|
|
* Doing anything during the async pass would be counterproductive.
|
|
*/
|
|
if (!wait)
|
|
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 dentry *root)
|
|
{
|
|
return -xfs_showargs(XFS_M(root->d_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_init_mount_workqueues(mp);
|
|
if (error)
|
|
goto out_close_devices;
|
|
|
|
error = xfs_icsb_init_counters(mp);
|
|
if (error)
|
|
goto out_destroy_workqueues;
|
|
|
|
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_destroy_workqueues:
|
|
xfs_destroy_mount_workqueues(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_flush_buftarg(mp->m_ddev_targp, 1);
|
|
|
|
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,
|
|
.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)
|
|
{
|
|
/*
|
|
* We never want to the same work item to run twice, reclaiming inodes
|
|
* or idling the log is not going to get any faster by multiple CPUs
|
|
* competing for ressources. Use the default large max_active value
|
|
* so that even lots of filesystems can perform these task in parallel.
|
|
*/
|
|
xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0);
|
|
if (!xfs_syncd_wq)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_workqueues(void)
|
|
{
|
|
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_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");
|