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![Darrick J. Wong](/assets/img/avatar_default.png)
Back in the 6.2-rc1 days, Eric Whitney reported a fstests regression in ext4 against generic/454. The cause of this test failure was the unfortunate combination of setting an xattr name containing UTF8 encoded emoji, an xattr hash function that accepted a char pointer with no explicit signedness, signed type extension of those chars to an int, and the 6.2 build tools maintainers deciding to mandate -funsigned-char across the board. As a result, the ondisk extended attribute structure written out by 6.1 and 6.2 were not the same. This discrepancy, in fact, had been noticeable if a filesystem with such an xattr were moved between any two architectures that don't employ the same signedness of a raw "char" declaration. The only reason anyone noticed is that x86 gcc defaults to signed, and no such -funsigned-char update was made to e2fsprogs, so e2fsck immediately started reporting data corruption. After a day and a half of discussing how to handle this use case (xattrs with bit 7 set anywhere in the name) without breaking existing users, Linus merged his own patch and didn't tell the maintainer. None of the ext4 developers realized this until AUTOSEL announced that the commit had been backported to stable. In the end, this problem could have been detected much earlier if there had been any useful tests of hash function(s) in use inside ext4 to make sure that they always produce the same outputs given the same inputs. The XFS dirent/xattr name hash takes a uint8_t*, so I don't think it's vulnerable to this problem. However, let's avoid all this drama by adding our own self test to check that the da hash produces the same outputs for a static pile of inputs on various platforms. This enables us to fix any breakage that may result in a controlled fashion. The buffer and test data are identical to the patches submitted to xfsprogs. Link: https://lore.kernel.org/linux-ext4/Y8bpkm3jA3bDm3eL@debian-BULLSEYE-live-builder-AMD64/ Link: https://lore.kernel.org/linux-xfs/ZBUKCRR7xvIqPrpX@destitution/T/#md38272cc684e2c0d61494435ccbb91f022e8dee4 Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2411 lines
60 KiB
C
2411 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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#include "xfs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_sb.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_bmap.h"
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#include "xfs_alloc.h"
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#include "xfs_fsops.h"
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#include "xfs_trans.h"
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#include "xfs_buf_item.h"
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#include "xfs_log.h"
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#include "xfs_log_priv.h"
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#include "xfs_dir2.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_icache.h"
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#include "xfs_trace.h"
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#include "xfs_icreate_item.h"
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#include "xfs_filestream.h"
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#include "xfs_quota.h"
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#include "xfs_sysfs.h"
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#include "xfs_ondisk.h"
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#include "xfs_rmap_item.h"
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#include "xfs_refcount_item.h"
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#include "xfs_bmap_item.h"
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#include "xfs_reflink.h"
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#include "xfs_pwork.h"
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#include "xfs_ag.h"
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#include "xfs_defer.h"
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#include "xfs_attr_item.h"
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#include "xfs_xattr.h"
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#include "xfs_iunlink_item.h"
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#include "xfs_dahash_test.h"
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#include <linux/magic.h>
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#include <linux/fs_context.h>
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#include <linux/fs_parser.h>
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static const struct super_operations xfs_super_operations;
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static struct kset *xfs_kset; /* top-level xfs sysfs dir */
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#ifdef DEBUG
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static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
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#endif
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#ifdef CONFIG_HOTPLUG_CPU
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static LIST_HEAD(xfs_mount_list);
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static DEFINE_SPINLOCK(xfs_mount_list_lock);
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static inline void xfs_mount_list_add(struct xfs_mount *mp)
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{
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spin_lock(&xfs_mount_list_lock);
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list_add(&mp->m_mount_list, &xfs_mount_list);
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spin_unlock(&xfs_mount_list_lock);
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}
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static inline void xfs_mount_list_del(struct xfs_mount *mp)
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{
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spin_lock(&xfs_mount_list_lock);
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list_del(&mp->m_mount_list);
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spin_unlock(&xfs_mount_list_lock);
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}
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#else /* !CONFIG_HOTPLUG_CPU */
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static inline void xfs_mount_list_add(struct xfs_mount *mp) {}
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static inline void xfs_mount_list_del(struct xfs_mount *mp) {}
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#endif
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enum xfs_dax_mode {
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XFS_DAX_INODE = 0,
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XFS_DAX_ALWAYS = 1,
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XFS_DAX_NEVER = 2,
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};
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static void
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xfs_mount_set_dax_mode(
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struct xfs_mount *mp,
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enum xfs_dax_mode mode)
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{
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switch (mode) {
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case XFS_DAX_INODE:
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mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
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break;
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case XFS_DAX_ALWAYS:
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mp->m_features |= XFS_FEAT_DAX_ALWAYS;
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mp->m_features &= ~XFS_FEAT_DAX_NEVER;
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break;
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case XFS_DAX_NEVER:
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mp->m_features |= XFS_FEAT_DAX_NEVER;
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mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
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break;
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}
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}
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static const struct constant_table dax_param_enums[] = {
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{"inode", XFS_DAX_INODE },
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{"always", XFS_DAX_ALWAYS },
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{"never", XFS_DAX_NEVER },
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{}
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};
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/*
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* Table driven mount option parser.
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*/
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enum {
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Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
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Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
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Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
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Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
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Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
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Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
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Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
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Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
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Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,
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};
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static const struct fs_parameter_spec xfs_fs_parameters[] = {
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fsparam_u32("logbufs", Opt_logbufs),
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fsparam_string("logbsize", Opt_logbsize),
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fsparam_string("logdev", Opt_logdev),
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fsparam_string("rtdev", Opt_rtdev),
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fsparam_flag("wsync", Opt_wsync),
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fsparam_flag("noalign", Opt_noalign),
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fsparam_flag("swalloc", Opt_swalloc),
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fsparam_u32("sunit", Opt_sunit),
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fsparam_u32("swidth", Opt_swidth),
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fsparam_flag("nouuid", Opt_nouuid),
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fsparam_flag("grpid", Opt_grpid),
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fsparam_flag("nogrpid", Opt_nogrpid),
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fsparam_flag("bsdgroups", Opt_bsdgroups),
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fsparam_flag("sysvgroups", Opt_sysvgroups),
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fsparam_string("allocsize", Opt_allocsize),
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fsparam_flag("norecovery", Opt_norecovery),
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fsparam_flag("inode64", Opt_inode64),
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fsparam_flag("inode32", Opt_inode32),
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fsparam_flag("ikeep", Opt_ikeep),
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fsparam_flag("noikeep", Opt_noikeep),
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fsparam_flag("largeio", Opt_largeio),
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fsparam_flag("nolargeio", Opt_nolargeio),
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fsparam_flag("attr2", Opt_attr2),
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fsparam_flag("noattr2", Opt_noattr2),
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fsparam_flag("filestreams", Opt_filestreams),
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fsparam_flag("quota", Opt_quota),
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fsparam_flag("noquota", Opt_noquota),
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fsparam_flag("usrquota", Opt_usrquota),
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fsparam_flag("grpquota", Opt_grpquota),
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fsparam_flag("prjquota", Opt_prjquota),
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fsparam_flag("uquota", Opt_uquota),
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fsparam_flag("gquota", Opt_gquota),
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fsparam_flag("pquota", Opt_pquota),
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fsparam_flag("uqnoenforce", Opt_uqnoenforce),
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fsparam_flag("gqnoenforce", Opt_gqnoenforce),
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fsparam_flag("pqnoenforce", Opt_pqnoenforce),
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fsparam_flag("qnoenforce", Opt_qnoenforce),
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fsparam_flag("discard", Opt_discard),
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fsparam_flag("nodiscard", Opt_nodiscard),
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fsparam_flag("dax", Opt_dax),
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fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
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{}
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};
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struct proc_xfs_info {
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uint64_t flag;
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char *str;
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};
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static int
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xfs_fs_show_options(
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struct seq_file *m,
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struct dentry *root)
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{
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static struct proc_xfs_info xfs_info_set[] = {
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/* the few simple ones we can get from the mount struct */
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{ XFS_FEAT_IKEEP, ",ikeep" },
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{ XFS_FEAT_WSYNC, ",wsync" },
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{ XFS_FEAT_NOALIGN, ",noalign" },
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{ XFS_FEAT_SWALLOC, ",swalloc" },
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{ XFS_FEAT_NOUUID, ",nouuid" },
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{ XFS_FEAT_NORECOVERY, ",norecovery" },
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{ XFS_FEAT_ATTR2, ",attr2" },
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{ XFS_FEAT_FILESTREAMS, ",filestreams" },
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{ XFS_FEAT_GRPID, ",grpid" },
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{ XFS_FEAT_DISCARD, ",discard" },
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{ XFS_FEAT_LARGE_IOSIZE, ",largeio" },
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{ XFS_FEAT_DAX_ALWAYS, ",dax=always" },
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{ XFS_FEAT_DAX_NEVER, ",dax=never" },
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{ 0, NULL }
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};
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struct xfs_mount *mp = XFS_M(root->d_sb);
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struct proc_xfs_info *xfs_infop;
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for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
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if (mp->m_features & xfs_infop->flag)
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seq_puts(m, xfs_infop->str);
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}
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seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64);
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if (xfs_has_allocsize(mp))
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seq_printf(m, ",allocsize=%dk",
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(1 << mp->m_allocsize_log) >> 10);
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if (mp->m_logbufs > 0)
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seq_printf(m, ",logbufs=%d", mp->m_logbufs);
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if (mp->m_logbsize > 0)
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seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
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if (mp->m_logname)
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seq_show_option(m, "logdev", mp->m_logname);
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if (mp->m_rtname)
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seq_show_option(m, "rtdev", mp->m_rtname);
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if (mp->m_dalign > 0)
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seq_printf(m, ",sunit=%d",
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(int)XFS_FSB_TO_BB(mp, mp->m_dalign));
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if (mp->m_swidth > 0)
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seq_printf(m, ",swidth=%d",
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(int)XFS_FSB_TO_BB(mp, mp->m_swidth));
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if (mp->m_qflags & XFS_UQUOTA_ENFD)
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seq_puts(m, ",usrquota");
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else if (mp->m_qflags & XFS_UQUOTA_ACCT)
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seq_puts(m, ",uqnoenforce");
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if (mp->m_qflags & XFS_PQUOTA_ENFD)
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seq_puts(m, ",prjquota");
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else if (mp->m_qflags & XFS_PQUOTA_ACCT)
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seq_puts(m, ",pqnoenforce");
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if (mp->m_qflags & XFS_GQUOTA_ENFD)
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seq_puts(m, ",grpquota");
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else if (mp->m_qflags & XFS_GQUOTA_ACCT)
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seq_puts(m, ",gqnoenforce");
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if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
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seq_puts(m, ",noquota");
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return 0;
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}
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static bool
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xfs_set_inode_alloc_perag(
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struct xfs_perag *pag,
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xfs_ino_t ino,
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xfs_agnumber_t max_metadata)
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{
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if (!xfs_is_inode32(pag->pag_mount)) {
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set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
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clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
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return false;
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}
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if (ino > XFS_MAXINUMBER_32) {
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clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
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clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
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return false;
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}
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set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
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if (pag->pag_agno < max_metadata)
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set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
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else
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clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
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return true;
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}
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/*
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* Set parameters for inode allocation heuristics, taking into account
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* filesystem size and inode32/inode64 mount options; i.e. specifically
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* whether or not XFS_FEAT_SMALL_INUMS is set.
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*
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* Inode allocation patterns are altered only if inode32 is requested
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* (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
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* If altered, XFS_OPSTATE_INODE32 is set as well.
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*
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* An agcount independent of that in the mount structure is provided
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* because in the growfs case, mp->m_sb.sb_agcount is not yet updated
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* to the potentially higher ag count.
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*
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* Returns the maximum AG index which may contain inodes.
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*/
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xfs_agnumber_t
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xfs_set_inode_alloc(
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struct xfs_mount *mp,
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xfs_agnumber_t agcount)
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{
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xfs_agnumber_t index;
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xfs_agnumber_t maxagi = 0;
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xfs_sb_t *sbp = &mp->m_sb;
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xfs_agnumber_t max_metadata;
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xfs_agino_t agino;
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xfs_ino_t ino;
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/*
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* Calculate how much should be reserved for inodes to meet
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* the max inode percentage. Used only for inode32.
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*/
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if (M_IGEO(mp)->maxicount) {
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uint64_t icount;
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icount = sbp->sb_dblocks * sbp->sb_imax_pct;
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do_div(icount, 100);
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icount += sbp->sb_agblocks - 1;
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do_div(icount, sbp->sb_agblocks);
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max_metadata = icount;
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} else {
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max_metadata = agcount;
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}
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/* Get the last possible inode in the filesystem */
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agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
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ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
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/*
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* If user asked for no more than 32-bit inodes, and the fs is
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* sufficiently large, set XFS_OPSTATE_INODE32 if we must alter
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* the allocator to accommodate the request.
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*/
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if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
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set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
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else
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clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
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for (index = 0; index < agcount; index++) {
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struct xfs_perag *pag;
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ino = XFS_AGINO_TO_INO(mp, index, agino);
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pag = xfs_perag_get(mp, index);
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if (xfs_set_inode_alloc_perag(pag, ino, max_metadata))
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maxagi++;
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xfs_perag_put(pag);
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}
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return xfs_is_inode32(mp) ? maxagi : agcount;
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}
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static int
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xfs_setup_dax_always(
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struct xfs_mount *mp)
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{
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if (!mp->m_ddev_targp->bt_daxdev &&
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(!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) {
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xfs_alert(mp,
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"DAX unsupported by block device. Turning off DAX.");
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goto disable_dax;
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}
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if (mp->m_super->s_blocksize != PAGE_SIZE) {
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xfs_alert(mp,
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"DAX not supported for blocksize. Turning off DAX.");
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goto disable_dax;
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}
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if (xfs_has_reflink(mp) &&
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bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
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xfs_alert(mp,
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"DAX and reflink cannot work with multi-partitions!");
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return -EINVAL;
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}
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xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
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return 0;
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disable_dax:
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xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
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return 0;
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}
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|
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STATIC int
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xfs_blkdev_get(
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xfs_mount_t *mp,
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const char *name,
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struct block_device **bdevp)
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{
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int error = 0;
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*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
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mp);
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if (IS_ERR(*bdevp)) {
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error = PTR_ERR(*bdevp);
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xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
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}
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return error;
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}
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|
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STATIC void
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xfs_blkdev_put(
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struct block_device *bdev)
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|
{
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if (bdev)
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blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
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}
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|
|
STATIC void
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|
xfs_close_devices(
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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->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->m_rtdev_targp);
|
|
xfs_blkdev_put(rtdev);
|
|
}
|
|
xfs_free_buftarg(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)
|
|
return error;
|
|
}
|
|
|
|
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);
|
|
if (!mp->m_ddev_targp)
|
|
goto out_close_rtdev;
|
|
|
|
if (rtdev) {
|
|
mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
|
|
if (!mp->m_rtdev_targp)
|
|
goto out_free_ddev_targ;
|
|
}
|
|
|
|
if (logdev && logdev != ddev) {
|
|
mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
|
|
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->m_rtdev_targp);
|
|
out_free_ddev_targ:
|
|
xfs_free_buftarg(mp->m_ddev_targp);
|
|
out_close_rtdev:
|
|
xfs_blkdev_put(rtdev);
|
|
out_close_logdev:
|
|
if (logdev && logdev != ddev)
|
|
xfs_blkdev_put(logdev);
|
|
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_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_has_sector(mp))
|
|
log_sector_size = mp->m_sb.sb_logsectsize;
|
|
error = xfs_setsize_buftarg(mp->m_logdev_targp,
|
|
log_sector_size);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (mp->m_rtdev_targp) {
|
|
error = xfs_setsize_buftarg(mp->m_rtdev_targp,
|
|
mp->m_sb.sb_sectsize);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_init_mount_workqueues(
|
|
struct xfs_mount *mp)
|
|
{
|
|
mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
|
|
1, mp->m_super->s_id);
|
|
if (!mp->m_buf_workqueue)
|
|
goto out;
|
|
|
|
mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
|
|
0, mp->m_super->s_id);
|
|
if (!mp->m_unwritten_workqueue)
|
|
goto out_destroy_buf;
|
|
|
|
mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
|
|
0, mp->m_super->s_id);
|
|
if (!mp->m_reclaim_workqueue)
|
|
goto out_destroy_unwritten;
|
|
|
|
mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s",
|
|
XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM),
|
|
0, mp->m_super->s_id);
|
|
if (!mp->m_blockgc_wq)
|
|
goto out_destroy_reclaim;
|
|
|
|
mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
|
|
1, mp->m_super->s_id);
|
|
if (!mp->m_inodegc_wq)
|
|
goto out_destroy_blockgc;
|
|
|
|
mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id);
|
|
if (!mp->m_sync_workqueue)
|
|
goto out_destroy_inodegc;
|
|
|
|
return 0;
|
|
|
|
out_destroy_inodegc:
|
|
destroy_workqueue(mp->m_inodegc_wq);
|
|
out_destroy_blockgc:
|
|
destroy_workqueue(mp->m_blockgc_wq);
|
|
out_destroy_reclaim:
|
|
destroy_workqueue(mp->m_reclaim_workqueue);
|
|
out_destroy_unwritten:
|
|
destroy_workqueue(mp->m_unwritten_workqueue);
|
|
out_destroy_buf:
|
|
destroy_workqueue(mp->m_buf_workqueue);
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_mount_workqueues(
|
|
struct xfs_mount *mp)
|
|
{
|
|
destroy_workqueue(mp->m_sync_workqueue);
|
|
destroy_workqueue(mp->m_blockgc_wq);
|
|
destroy_workqueue(mp->m_inodegc_wq);
|
|
destroy_workqueue(mp->m_reclaim_workqueue);
|
|
destroy_workqueue(mp->m_unwritten_workqueue);
|
|
destroy_workqueue(mp->m_buf_workqueue);
|
|
}
|
|
|
|
static void
|
|
xfs_flush_inodes_worker(
|
|
struct work_struct *work)
|
|
{
|
|
struct xfs_mount *mp = container_of(work, struct xfs_mount,
|
|
m_flush_inodes_work);
|
|
struct super_block *sb = mp->m_super;
|
|
|
|
if (down_read_trylock(&sb->s_umount)) {
|
|
sync_inodes_sb(sb);
|
|
up_read(&sb->s_umount);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
|
|
* or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
|
|
* for IO to complete so that we effectively throttle multiple callers to the
|
|
* rate at which IO is completing.
|
|
*/
|
|
void
|
|
xfs_flush_inodes(
|
|
struct xfs_mount *mp)
|
|
{
|
|
/*
|
|
* If flush_work() returns true then that means we waited for a flush
|
|
* which was already in progress. Don't bother running another scan.
|
|
*/
|
|
if (flush_work(&mp->m_flush_inodes_work))
|
|
return;
|
|
|
|
queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
|
|
flush_work(&mp->m_flush_inodes_work);
|
|
}
|
|
|
|
/* 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 inactivate and reclaim the inode.
|
|
*/
|
|
STATIC void
|
|
xfs_fs_destroy_inode(
|
|
struct inode *inode)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
|
|
trace_xfs_destroy_inode(ip);
|
|
|
|
ASSERT(!rwsem_is_locked(&inode->i_rwsem));
|
|
XFS_STATS_INC(ip->i_mount, vn_rele);
|
|
XFS_STATS_INC(ip->i_mount, vn_remove);
|
|
xfs_inode_mark_reclaimable(ip);
|
|
}
|
|
|
|
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;
|
|
|
|
if (!(inode->i_sb->s_flags & SB_LAZYTIME))
|
|
return;
|
|
|
|
/*
|
|
* Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC)
|
|
* and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed
|
|
* in flags possibly together with I_DIRTY_SYNC.
|
|
*/
|
|
if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME))
|
|
return;
|
|
|
|
if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
|
|
return;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
|
|
xfs_trans_commit(tp);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* We do an unlocked check for XFS_IDONTCACHE here because we are already
|
|
* serialised against cache hits here via the inode->i_lock and igrab() in
|
|
* xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
|
|
* racing with us, and it avoids needing to grab a spinlock here for every inode
|
|
* we drop the final reference on.
|
|
*/
|
|
STATIC int
|
|
xfs_fs_drop_inode(
|
|
struct inode *inode)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
|
|
/*
|
|
* If this unlinked inode is in the middle of recovery, don't
|
|
* drop the inode just yet; log recovery will take care of
|
|
* that. See the comment for this inode flag.
|
|
*/
|
|
if (ip->i_flags & XFS_IRECOVERY) {
|
|
ASSERT(xlog_recovery_needed(ip->i_mount->m_log));
|
|
return 0;
|
|
}
|
|
|
|
return generic_drop_inode(inode);
|
|
}
|
|
|
|
static void
|
|
xfs_mount_free(
|
|
struct xfs_mount *mp)
|
|
{
|
|
kfree(mp->m_rtname);
|
|
kfree(mp->m_logname);
|
|
kmem_free(mp);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_fs_sync_fs(
|
|
struct super_block *sb,
|
|
int wait)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(sb);
|
|
int error;
|
|
|
|
trace_xfs_fs_sync_fs(mp, __return_address);
|
|
|
|
/*
|
|
* Doing anything during the async pass would be counterproductive.
|
|
*/
|
|
if (!wait)
|
|
return 0;
|
|
|
|
error = xfs_log_force(mp, XFS_LOG_SYNC);
|
|
if (error)
|
|
return error;
|
|
|
|
if (laptop_mode) {
|
|
/*
|
|
* The disk must be active because we're syncing.
|
|
* We schedule log work now (now that the disk is
|
|
* active) instead of later (when it might not be).
|
|
*/
|
|
flush_delayed_work(&mp->m_log->l_work);
|
|
}
|
|
|
|
/*
|
|
* If we are called with page faults frozen out, it means we are about
|
|
* to freeze the transaction subsystem. Take the opportunity to shut
|
|
* down inodegc because once SB_FREEZE_FS is set it's too late to
|
|
* prevent inactivation races with freeze. The fs doesn't get called
|
|
* again by the freezing process until after SB_FREEZE_FS has been set,
|
|
* so it's now or never. Same logic applies to speculative allocation
|
|
* garbage collection.
|
|
*
|
|
* We don't care if this is a normal syncfs call that does this or
|
|
* freeze that does this - we can run this multiple times without issue
|
|
* and we won't race with a restart because a restart can only occur
|
|
* when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE.
|
|
*/
|
|
if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) {
|
|
xfs_inodegc_stop(mp);
|
|
xfs_blockgc_stop(mp);
|
|
}
|
|
|
|
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(d_inode(dentry));
|
|
uint64_t fakeinos, id;
|
|
uint64_t icount;
|
|
uint64_t ifree;
|
|
uint64_t fdblocks;
|
|
xfs_extlen_t lsize;
|
|
int64_t ffree;
|
|
|
|
/*
|
|
* Expedite background inodegc but don't wait. We do not want to block
|
|
* here waiting hours for a billion extent file to be truncated.
|
|
*/
|
|
xfs_inodegc_push(mp);
|
|
|
|
statp->f_type = XFS_SUPER_MAGIC;
|
|
statp->f_namelen = MAXNAMELEN - 1;
|
|
|
|
id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
|
|
statp->f_fsid = u64_to_fsid(id);
|
|
|
|
icount = percpu_counter_sum(&mp->m_icount);
|
|
ifree = percpu_counter_sum(&mp->m_ifree);
|
|
fdblocks = percpu_counter_sum(&mp->m_fdblocks);
|
|
|
|
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;
|
|
spin_unlock(&mp->m_sb_lock);
|
|
|
|
/* make sure statp->f_bfree does not underflow */
|
|
statp->f_bfree = max_t(int64_t, 0,
|
|
fdblocks - xfs_fdblocks_unavailable(mp));
|
|
statp->f_bavail = statp->f_bfree;
|
|
|
|
fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
|
|
statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
|
|
if (M_IGEO(mp)->maxicount)
|
|
statp->f_files = min_t(typeof(statp->f_files),
|
|
statp->f_files,
|
|
M_IGEO(mp)->maxicount);
|
|
|
|
/* If sb_icount overshot maxicount, report actual allocation */
|
|
statp->f_files = max_t(typeof(statp->f_files),
|
|
statp->f_files,
|
|
sbp->sb_icount);
|
|
|
|
/* make sure statp->f_ffree does not underflow */
|
|
ffree = statp->f_files - (icount - ifree);
|
|
statp->f_ffree = max_t(int64_t, ffree, 0);
|
|
|
|
|
|
if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
|
|
((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
|
|
(XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
|
|
xfs_qm_statvfs(ip, statp);
|
|
|
|
if (XFS_IS_REALTIME_MOUNT(mp) &&
|
|
(ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
|
|
s64 freertx;
|
|
|
|
statp->f_blocks = sbp->sb_rblocks;
|
|
freertx = percpu_counter_sum_positive(&mp->m_frextents);
|
|
statp->f_bavail = statp->f_bfree = freertx * sbp->sb_rextsize;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Second stage of a freeze. The data is already frozen so we only
|
|
* need to take care of the metadata. Once that's done sync the superblock
|
|
* to the log to dirty it in case of a crash while frozen. This ensures that we
|
|
* will recover the unlinked inode lists on the next mount.
|
|
*/
|
|
STATIC int
|
|
xfs_fs_freeze(
|
|
struct super_block *sb)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(sb);
|
|
unsigned int flags;
|
|
int ret;
|
|
|
|
/*
|
|
* The filesystem is now frozen far enough that memory reclaim
|
|
* cannot safely operate on the filesystem. Hence we need to
|
|
* set a GFP_NOFS context here to avoid recursion deadlocks.
|
|
*/
|
|
flags = memalloc_nofs_save();
|
|
xfs_save_resvblks(mp);
|
|
ret = xfs_log_quiesce(mp);
|
|
memalloc_nofs_restore(flags);
|
|
|
|
/*
|
|
* For read-write filesystems, we need to restart the inodegc on error
|
|
* because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not
|
|
* going to be run to restart it now. We are at SB_FREEZE_FS level
|
|
* here, so we can restart safely without racing with a stop in
|
|
* xfs_fs_sync_fs().
|
|
*/
|
|
if (ret && !xfs_is_readonly(mp)) {
|
|
xfs_blockgc_start(mp);
|
|
xfs_inodegc_start(mp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_fs_unfreeze(
|
|
struct super_block *sb)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(sb);
|
|
|
|
xfs_restore_resvblks(mp);
|
|
xfs_log_work_queue(mp);
|
|
|
|
/*
|
|
* Don't reactivate the inodegc worker on a readonly filesystem because
|
|
* inodes are sent directly to reclaim. Don't reactivate the blockgc
|
|
* worker because there are no speculative preallocations on a readonly
|
|
* filesystem.
|
|
*/
|
|
if (!xfs_is_readonly(mp)) {
|
|
xfs_blockgc_start(mp);
|
|
xfs_inodegc_start(mp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/* Fail a mount where the logbuf is smaller than the log stripe */
|
|
if (xfs_has_logv2(mp)) {
|
|
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 -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 -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* V5 filesystems always use attr2 format for attributes.
|
|
*/
|
|
if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) {
|
|
xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
|
|
"attr2 is always enabled for V5 filesystems.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* prohibit r/w mounts of read-only filesystems
|
|
*/
|
|
if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) {
|
|
xfs_warn(mp,
|
|
"cannot mount a read-only filesystem as read-write");
|
|
return -EROFS;
|
|
}
|
|
|
|
if ((mp->m_qflags & XFS_GQUOTA_ACCT) &&
|
|
(mp->m_qflags & XFS_PQUOTA_ACCT) &&
|
|
!xfs_has_pquotino(mp)) {
|
|
xfs_warn(mp,
|
|
"Super block does not support project and group quota together");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_init_percpu_counters(
|
|
struct xfs_mount *mp)
|
|
{
|
|
int error;
|
|
|
|
error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
|
|
if (error)
|
|
return -ENOMEM;
|
|
|
|
error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
|
|
if (error)
|
|
goto free_icount;
|
|
|
|
error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
|
|
if (error)
|
|
goto free_ifree;
|
|
|
|
error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
|
|
if (error)
|
|
goto free_fdblocks;
|
|
|
|
error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
|
|
if (error)
|
|
goto free_delalloc;
|
|
|
|
return 0;
|
|
|
|
free_delalloc:
|
|
percpu_counter_destroy(&mp->m_delalloc_blks);
|
|
free_fdblocks:
|
|
percpu_counter_destroy(&mp->m_fdblocks);
|
|
free_ifree:
|
|
percpu_counter_destroy(&mp->m_ifree);
|
|
free_icount:
|
|
percpu_counter_destroy(&mp->m_icount);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void
|
|
xfs_reinit_percpu_counters(
|
|
struct xfs_mount *mp)
|
|
{
|
|
percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
|
|
percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
|
|
percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
|
|
percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents);
|
|
}
|
|
|
|
static void
|
|
xfs_destroy_percpu_counters(
|
|
struct xfs_mount *mp)
|
|
{
|
|
percpu_counter_destroy(&mp->m_icount);
|
|
percpu_counter_destroy(&mp->m_ifree);
|
|
percpu_counter_destroy(&mp->m_fdblocks);
|
|
ASSERT(xfs_is_shutdown(mp) ||
|
|
percpu_counter_sum(&mp->m_delalloc_blks) == 0);
|
|
percpu_counter_destroy(&mp->m_delalloc_blks);
|
|
percpu_counter_destroy(&mp->m_frextents);
|
|
}
|
|
|
|
static int
|
|
xfs_inodegc_init_percpu(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_inodegc *gc;
|
|
int cpu;
|
|
|
|
mp->m_inodegc = alloc_percpu(struct xfs_inodegc);
|
|
if (!mp->m_inodegc)
|
|
return -ENOMEM;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
gc = per_cpu_ptr(mp->m_inodegc, cpu);
|
|
init_llist_head(&gc->list);
|
|
gc->items = 0;
|
|
INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
xfs_inodegc_free_percpu(
|
|
struct xfs_mount *mp)
|
|
{
|
|
if (!mp->m_inodegc)
|
|
return;
|
|
free_percpu(mp->m_inodegc);
|
|
}
|
|
|
|
static void
|
|
xfs_fs_put_super(
|
|
struct super_block *sb)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(sb);
|
|
|
|
/* if ->fill_super failed, we have no mount to tear down */
|
|
if (!sb->s_fs_info)
|
|
return;
|
|
|
|
xfs_notice(mp, "Unmounting Filesystem %pU", &mp->m_sb.sb_uuid);
|
|
xfs_filestream_unmount(mp);
|
|
xfs_unmountfs(mp);
|
|
|
|
xfs_freesb(mp);
|
|
free_percpu(mp->m_stats.xs_stats);
|
|
xfs_mount_list_del(mp);
|
|
xfs_inodegc_free_percpu(mp);
|
|
xfs_destroy_percpu_counters(mp);
|
|
xfs_destroy_mount_workqueues(mp);
|
|
xfs_close_devices(mp);
|
|
|
|
sb->s_fs_info = NULL;
|
|
xfs_mount_free(mp);
|
|
}
|
|
|
|
static long
|
|
xfs_fs_nr_cached_objects(
|
|
struct super_block *sb,
|
|
struct shrink_control *sc)
|
|
{
|
|
/* Paranoia: catch incorrect calls during mount setup or teardown */
|
|
if (WARN_ON_ONCE(!sb->s_fs_info))
|
|
return 0;
|
|
return xfs_reclaim_inodes_count(XFS_M(sb));
|
|
}
|
|
|
|
static long
|
|
xfs_fs_free_cached_objects(
|
|
struct super_block *sb,
|
|
struct shrink_control *sc)
|
|
{
|
|
return xfs_reclaim_inodes_nr(XFS_M(sb), sc->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,
|
|
.drop_inode = xfs_fs_drop_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,
|
|
.show_options = xfs_fs_show_options,
|
|
.nr_cached_objects = xfs_fs_nr_cached_objects,
|
|
.free_cached_objects = xfs_fs_free_cached_objects,
|
|
};
|
|
|
|
static int
|
|
suffix_kstrtoint(
|
|
const char *s,
|
|
unsigned int base,
|
|
int *res)
|
|
{
|
|
int last, shift_left_factor = 0, _res;
|
|
char *value;
|
|
int ret = 0;
|
|
|
|
value = kstrdup(s, GFP_KERNEL);
|
|
if (!value)
|
|
return -ENOMEM;
|
|
|
|
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';
|
|
}
|
|
|
|
if (kstrtoint(value, base, &_res))
|
|
ret = -EINVAL;
|
|
kfree(value);
|
|
*res = _res << shift_left_factor;
|
|
return ret;
|
|
}
|
|
|
|
static inline void
|
|
xfs_fs_warn_deprecated(
|
|
struct fs_context *fc,
|
|
struct fs_parameter *param,
|
|
uint64_t flag,
|
|
bool value)
|
|
{
|
|
/* Don't print the warning if reconfiguring and current mount point
|
|
* already had the flag set
|
|
*/
|
|
if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
|
|
!!(XFS_M(fc->root->d_sb)->m_features & flag) == value)
|
|
return;
|
|
xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
|
|
}
|
|
|
|
/*
|
|
* Set mount state from a mount option.
|
|
*
|
|
* NOTE: mp->m_super is NULL here!
|
|
*/
|
|
static int
|
|
xfs_fs_parse_param(
|
|
struct fs_context *fc,
|
|
struct fs_parameter *param)
|
|
{
|
|
struct xfs_mount *parsing_mp = fc->s_fs_info;
|
|
struct fs_parse_result result;
|
|
int size = 0;
|
|
int opt;
|
|
|
|
opt = fs_parse(fc, xfs_fs_parameters, param, &result);
|
|
if (opt < 0)
|
|
return opt;
|
|
|
|
switch (opt) {
|
|
case Opt_logbufs:
|
|
parsing_mp->m_logbufs = result.uint_32;
|
|
return 0;
|
|
case Opt_logbsize:
|
|
if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize))
|
|
return -EINVAL;
|
|
return 0;
|
|
case Opt_logdev:
|
|
kfree(parsing_mp->m_logname);
|
|
parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL);
|
|
if (!parsing_mp->m_logname)
|
|
return -ENOMEM;
|
|
return 0;
|
|
case Opt_rtdev:
|
|
kfree(parsing_mp->m_rtname);
|
|
parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
|
|
if (!parsing_mp->m_rtname)
|
|
return -ENOMEM;
|
|
return 0;
|
|
case Opt_allocsize:
|
|
if (suffix_kstrtoint(param->string, 10, &size))
|
|
return -EINVAL;
|
|
parsing_mp->m_allocsize_log = ffs(size) - 1;
|
|
parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE;
|
|
return 0;
|
|
case Opt_grpid:
|
|
case Opt_bsdgroups:
|
|
parsing_mp->m_features |= XFS_FEAT_GRPID;
|
|
return 0;
|
|
case Opt_nogrpid:
|
|
case Opt_sysvgroups:
|
|
parsing_mp->m_features &= ~XFS_FEAT_GRPID;
|
|
return 0;
|
|
case Opt_wsync:
|
|
parsing_mp->m_features |= XFS_FEAT_WSYNC;
|
|
return 0;
|
|
case Opt_norecovery:
|
|
parsing_mp->m_features |= XFS_FEAT_NORECOVERY;
|
|
return 0;
|
|
case Opt_noalign:
|
|
parsing_mp->m_features |= XFS_FEAT_NOALIGN;
|
|
return 0;
|
|
case Opt_swalloc:
|
|
parsing_mp->m_features |= XFS_FEAT_SWALLOC;
|
|
return 0;
|
|
case Opt_sunit:
|
|
parsing_mp->m_dalign = result.uint_32;
|
|
return 0;
|
|
case Opt_swidth:
|
|
parsing_mp->m_swidth = result.uint_32;
|
|
return 0;
|
|
case Opt_inode32:
|
|
parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS;
|
|
return 0;
|
|
case Opt_inode64:
|
|
parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
|
|
return 0;
|
|
case Opt_nouuid:
|
|
parsing_mp->m_features |= XFS_FEAT_NOUUID;
|
|
return 0;
|
|
case Opt_largeio:
|
|
parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE;
|
|
return 0;
|
|
case Opt_nolargeio:
|
|
parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE;
|
|
return 0;
|
|
case Opt_filestreams:
|
|
parsing_mp->m_features |= XFS_FEAT_FILESTREAMS;
|
|
return 0;
|
|
case Opt_noquota:
|
|
parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
|
|
parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
|
|
return 0;
|
|
case Opt_quota:
|
|
case Opt_uquota:
|
|
case Opt_usrquota:
|
|
parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_qnoenforce:
|
|
case Opt_uqnoenforce:
|
|
parsing_mp->m_qflags |= XFS_UQUOTA_ACCT;
|
|
parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_pquota:
|
|
case Opt_prjquota:
|
|
parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_pqnoenforce:
|
|
parsing_mp->m_qflags |= XFS_PQUOTA_ACCT;
|
|
parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_gquota:
|
|
case Opt_grpquota:
|
|
parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_gqnoenforce:
|
|
parsing_mp->m_qflags |= XFS_GQUOTA_ACCT;
|
|
parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_discard:
|
|
parsing_mp->m_features |= XFS_FEAT_DISCARD;
|
|
return 0;
|
|
case Opt_nodiscard:
|
|
parsing_mp->m_features &= ~XFS_FEAT_DISCARD;
|
|
return 0;
|
|
#ifdef CONFIG_FS_DAX
|
|
case Opt_dax:
|
|
xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS);
|
|
return 0;
|
|
case Opt_dax_enum:
|
|
xfs_mount_set_dax_mode(parsing_mp, result.uint_32);
|
|
return 0;
|
|
#endif
|
|
/* Following mount options will be removed in September 2025 */
|
|
case Opt_ikeep:
|
|
xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true);
|
|
parsing_mp->m_features |= XFS_FEAT_IKEEP;
|
|
return 0;
|
|
case Opt_noikeep:
|
|
xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false);
|
|
parsing_mp->m_features &= ~XFS_FEAT_IKEEP;
|
|
return 0;
|
|
case Opt_attr2:
|
|
xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true);
|
|
parsing_mp->m_features |= XFS_FEAT_ATTR2;
|
|
return 0;
|
|
case Opt_noattr2:
|
|
xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true);
|
|
parsing_mp->m_features |= XFS_FEAT_NOATTR2;
|
|
return 0;
|
|
default:
|
|
xfs_warn(parsing_mp, "unknown mount option [%s].", param->key);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_fs_validate_params(
|
|
struct xfs_mount *mp)
|
|
{
|
|
/* No recovery flag requires a read-only mount */
|
|
if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) {
|
|
xfs_warn(mp, "no-recovery mounts must be read-only.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* We have not read the superblock at this point, so only the attr2
|
|
* mount option can set the attr2 feature by this stage.
|
|
*/
|
|
if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) {
|
|
xfs_warn(mp, "attr2 and noattr2 cannot both be specified.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) {
|
|
xfs_warn(mp,
|
|
"sunit and swidth options incompatible with the noalign option");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
|
|
xfs_warn(mp, "quota support not available in this kernel.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((mp->m_dalign && !mp->m_swidth) ||
|
|
(!mp->m_dalign && mp->m_swidth)) {
|
|
xfs_warn(mp, "sunit and swidth must be specified together");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
|
|
xfs_warn(mp,
|
|
"stripe width (%d) must be a multiple of the stripe unit (%d)",
|
|
mp->m_swidth, mp->m_dalign);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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 -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 -EINVAL;
|
|
}
|
|
|
|
if (xfs_has_allocsize(mp) &&
|
|
(mp->m_allocsize_log > XFS_MAX_IO_LOG ||
|
|
mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
|
|
xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
|
|
mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_fs_fill_super(
|
|
struct super_block *sb,
|
|
struct fs_context *fc)
|
|
{
|
|
struct xfs_mount *mp = sb->s_fs_info;
|
|
struct inode *root;
|
|
int flags = 0, error;
|
|
|
|
mp->m_super = sb;
|
|
|
|
error = xfs_fs_validate_params(mp);
|
|
if (error)
|
|
goto out_free_names;
|
|
|
|
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;
|
|
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
|
|
#endif
|
|
sb->s_op = &xfs_super_operations;
|
|
|
|
/*
|
|
* Delay mount work if the debug hook is set. This is debug
|
|
* instrumention to coordinate simulation of xfs mount failures with
|
|
* VFS superblock operations
|
|
*/
|
|
if (xfs_globals.mount_delay) {
|
|
xfs_notice(mp, "Delaying mount for %d seconds.",
|
|
xfs_globals.mount_delay);
|
|
msleep(xfs_globals.mount_delay * 1000);
|
|
}
|
|
|
|
if (fc->sb_flags & SB_SILENT)
|
|
flags |= XFS_MFSI_QUIET;
|
|
|
|
error = xfs_open_devices(mp);
|
|
if (error)
|
|
goto out_free_names;
|
|
|
|
error = xfs_init_mount_workqueues(mp);
|
|
if (error)
|
|
goto out_close_devices;
|
|
|
|
error = xfs_init_percpu_counters(mp);
|
|
if (error)
|
|
goto out_destroy_workqueues;
|
|
|
|
error = xfs_inodegc_init_percpu(mp);
|
|
if (error)
|
|
goto out_destroy_counters;
|
|
|
|
/*
|
|
* All percpu data structures requiring cleanup when a cpu goes offline
|
|
* must be allocated before adding this @mp to the cpu-dead handler's
|
|
* mount list.
|
|
*/
|
|
xfs_mount_list_add(mp);
|
|
|
|
/* Allocate stats memory before we do operations that might use it */
|
|
mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
|
|
if (!mp->m_stats.xs_stats) {
|
|
error = -ENOMEM;
|
|
goto out_destroy_inodegc;
|
|
}
|
|
|
|
error = xfs_readsb(mp, flags);
|
|
if (error)
|
|
goto out_free_stats;
|
|
|
|
error = xfs_finish_flags(mp);
|
|
if (error)
|
|
goto out_free_sb;
|
|
|
|
error = xfs_setup_devices(mp);
|
|
if (error)
|
|
goto out_free_sb;
|
|
|
|
/* V4 support is undergoing deprecation. */
|
|
if (!xfs_has_crc(mp)) {
|
|
#ifdef CONFIG_XFS_SUPPORT_V4
|
|
xfs_warn_once(mp,
|
|
"Deprecated V4 format (crc=0) will not be supported after September 2030.");
|
|
#else
|
|
xfs_warn(mp,
|
|
"Deprecated V4 format (crc=0) not supported by kernel.");
|
|
error = -EINVAL;
|
|
goto out_free_sb;
|
|
#endif
|
|
}
|
|
|
|
/* Filesystem claims it needs repair, so refuse the mount. */
|
|
if (xfs_has_needsrepair(mp)) {
|
|
xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair.");
|
|
error = -EFSCORRUPTED;
|
|
goto out_free_sb;
|
|
}
|
|
|
|
/*
|
|
* Don't touch the filesystem if a user tool thinks it owns the primary
|
|
* superblock. mkfs doesn't clear the flag from secondary supers, so
|
|
* we don't check them at all.
|
|
*/
|
|
if (mp->m_sb.sb_inprogress) {
|
|
xfs_warn(mp, "Offline file system operation in progress!");
|
|
error = -EFSCORRUPTED;
|
|
goto out_free_sb;
|
|
}
|
|
|
|
/*
|
|
* Until this is fixed only page-sized or smaller data blocks work.
|
|
*/
|
|
if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
|
|
xfs_warn(mp,
|
|
"File system with blocksize %d bytes. "
|
|
"Only pagesize (%ld) or less will currently work.",
|
|
mp->m_sb.sb_blocksize, PAGE_SIZE);
|
|
error = -ENOSYS;
|
|
goto out_free_sb;
|
|
}
|
|
|
|
/* Ensure this filesystem fits in the page cache limits */
|
|
if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) ||
|
|
xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) {
|
|
xfs_warn(mp,
|
|
"file system too large to be mounted on this system.");
|
|
error = -EFBIG;
|
|
goto out_free_sb;
|
|
}
|
|
|
|
/*
|
|
* XFS block mappings use 54 bits to store the logical block offset.
|
|
* This should suffice to handle the maximum file size that the VFS
|
|
* supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
|
|
* bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
|
|
* calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
|
|
* to check this assertion.
|
|
*
|
|
* Avoid integer overflow by comparing the maximum bmbt offset to the
|
|
* maximum pagecache offset in units of fs blocks.
|
|
*/
|
|
if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
|
|
xfs_warn(mp,
|
|
"MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
|
|
XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
|
|
XFS_MAX_FILEOFF);
|
|
error = -EINVAL;
|
|
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.
|
|
*/
|
|
sb->s_magic = XFS_SUPER_MAGIC;
|
|
sb->s_blocksize = mp->m_sb.sb_blocksize;
|
|
sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
sb->s_max_links = XFS_MAXLINK;
|
|
sb->s_time_gran = 1;
|
|
if (xfs_has_bigtime(mp)) {
|
|
sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
|
|
sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
|
|
} else {
|
|
sb->s_time_min = XFS_LEGACY_TIME_MIN;
|
|
sb->s_time_max = XFS_LEGACY_TIME_MAX;
|
|
}
|
|
trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);
|
|
sb->s_iflags |= SB_I_CGROUPWB;
|
|
|
|
set_posix_acl_flag(sb);
|
|
|
|
/* version 5 superblocks support inode version counters. */
|
|
if (xfs_has_crc(mp))
|
|
sb->s_flags |= SB_I_VERSION;
|
|
|
|
if (xfs_has_dax_always(mp)) {
|
|
error = xfs_setup_dax_always(mp);
|
|
if (error)
|
|
goto out_filestream_unmount;
|
|
}
|
|
|
|
if (xfs_has_discard(mp) && !bdev_max_discard_sectors(sb->s_bdev)) {
|
|
xfs_warn(mp,
|
|
"mounting with \"discard\" option, but the device does not support discard");
|
|
mp->m_features &= ~XFS_FEAT_DISCARD;
|
|
}
|
|
|
|
if (xfs_has_reflink(mp)) {
|
|
if (mp->m_sb.sb_rblocks) {
|
|
xfs_alert(mp,
|
|
"reflink not compatible with realtime device!");
|
|
error = -EINVAL;
|
|
goto out_filestream_unmount;
|
|
}
|
|
|
|
if (xfs_globals.always_cow) {
|
|
xfs_info(mp, "using DEBUG-only always_cow mode.");
|
|
mp->m_always_cow = true;
|
|
}
|
|
}
|
|
|
|
if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) {
|
|
xfs_alert(mp,
|
|
"reverse mapping btree not compatible with realtime device!");
|
|
error = -EINVAL;
|
|
goto out_filestream_unmount;
|
|
}
|
|
|
|
if (xfs_has_large_extent_counts(mp))
|
|
xfs_warn(mp,
|
|
"EXPERIMENTAL Large extent counts feature in use. Use at your own risk!");
|
|
|
|
error = xfs_mountfs(mp);
|
|
if (error)
|
|
goto out_filestream_unmount;
|
|
|
|
root = igrab(VFS_I(mp->m_rootip));
|
|
if (!root) {
|
|
error = -ENOENT;
|
|
goto out_unmount;
|
|
}
|
|
sb->s_root = d_make_root(root);
|
|
if (!sb->s_root) {
|
|
error = -ENOMEM;
|
|
goto out_unmount;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_filestream_unmount:
|
|
xfs_filestream_unmount(mp);
|
|
out_free_sb:
|
|
xfs_freesb(mp);
|
|
out_free_stats:
|
|
free_percpu(mp->m_stats.xs_stats);
|
|
out_destroy_inodegc:
|
|
xfs_mount_list_del(mp);
|
|
xfs_inodegc_free_percpu(mp);
|
|
out_destroy_counters:
|
|
xfs_destroy_percpu_counters(mp);
|
|
out_destroy_workqueues:
|
|
xfs_destroy_mount_workqueues(mp);
|
|
out_close_devices:
|
|
xfs_close_devices(mp);
|
|
out_free_names:
|
|
sb->s_fs_info = NULL;
|
|
xfs_mount_free(mp);
|
|
return error;
|
|
|
|
out_unmount:
|
|
xfs_filestream_unmount(mp);
|
|
xfs_unmountfs(mp);
|
|
goto out_free_sb;
|
|
}
|
|
|
|
static int
|
|
xfs_fs_get_tree(
|
|
struct fs_context *fc)
|
|
{
|
|
return get_tree_bdev(fc, xfs_fs_fill_super);
|
|
}
|
|
|
|
static int
|
|
xfs_remount_rw(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_sb *sbp = &mp->m_sb;
|
|
int error;
|
|
|
|
if (xfs_has_norecovery(mp)) {
|
|
xfs_warn(mp,
|
|
"ro->rw transition prohibited on norecovery mount");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (xfs_sb_is_v5(sbp) &&
|
|
xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
|
|
xfs_warn(mp,
|
|
"ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
|
|
(sbp->sb_features_ro_compat &
|
|
XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
|
|
return -EINVAL;
|
|
}
|
|
|
|
clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
|
|
|
|
/*
|
|
* If this is the first remount to writeable state we might have some
|
|
* superblock changes to update.
|
|
*/
|
|
if (mp->m_update_sb) {
|
|
error = xfs_sync_sb(mp, false);
|
|
if (error) {
|
|
xfs_warn(mp, "failed to write sb changes");
|
|
return error;
|
|
}
|
|
mp->m_update_sb = false;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
xfs_log_work_queue(mp);
|
|
xfs_blockgc_start(mp);
|
|
|
|
/* Create the per-AG metadata reservation pool .*/
|
|
error = xfs_fs_reserve_ag_blocks(mp);
|
|
if (error && error != -ENOSPC)
|
|
return error;
|
|
|
|
/* Re-enable the background inode inactivation worker. */
|
|
xfs_inodegc_start(mp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_remount_ro(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_icwalk icw = {
|
|
.icw_flags = XFS_ICWALK_FLAG_SYNC,
|
|
};
|
|
int error;
|
|
|
|
/* Flush all the dirty data to disk. */
|
|
error = sync_filesystem(mp->m_super);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Cancel background eofb scanning so it cannot race with the final
|
|
* log force+buftarg wait and deadlock the remount.
|
|
*/
|
|
xfs_blockgc_stop(mp);
|
|
|
|
/*
|
|
* Clear out all remaining COW staging extents and speculative post-EOF
|
|
* preallocations so that we don't leave inodes requiring inactivation
|
|
* cleanups during reclaim on a read-only mount. We must process every
|
|
* cached inode, so this requires a synchronous cache scan.
|
|
*/
|
|
error = xfs_blockgc_free_space(mp, &icw);
|
|
if (error) {
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Stop the inodegc background worker. xfs_fs_reconfigure already
|
|
* flushed all pending inodegc work when it sync'd the filesystem.
|
|
* The VFS holds s_umount, so we know that inodes cannot enter
|
|
* xfs_fs_destroy_inode during a remount operation. In readonly mode
|
|
* we send inodes straight to reclaim, so no inodes will be queued.
|
|
*/
|
|
xfs_inodegc_stop(mp);
|
|
|
|
/* Free the per-AG metadata reservation pool. */
|
|
error = xfs_fs_unreserve_ag_blocks(mp);
|
|
if (error) {
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* 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_save_resvblks(mp);
|
|
|
|
xfs_log_clean(mp);
|
|
set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
static int
|
|
xfs_fs_reconfigure(
|
|
struct fs_context *fc)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(fc->root->d_sb);
|
|
struct xfs_mount *new_mp = fc->s_fs_info;
|
|
int flags = fc->sb_flags;
|
|
int error;
|
|
|
|
/* version 5 superblocks always support version counters. */
|
|
if (xfs_has_crc(mp))
|
|
fc->sb_flags |= SB_I_VERSION;
|
|
|
|
error = xfs_fs_validate_params(new_mp);
|
|
if (error)
|
|
return error;
|
|
|
|
/* inode32 -> inode64 */
|
|
if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) {
|
|
mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
|
|
mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
|
|
}
|
|
|
|
/* inode64 -> inode32 */
|
|
if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) {
|
|
mp->m_features |= XFS_FEAT_SMALL_INUMS;
|
|
mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
|
|
}
|
|
|
|
/* ro -> rw */
|
|
if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) {
|
|
error = xfs_remount_rw(mp);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* rw -> ro */
|
|
if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) {
|
|
error = xfs_remount_ro(mp);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xfs_fs_free(
|
|
struct fs_context *fc)
|
|
{
|
|
struct xfs_mount *mp = fc->s_fs_info;
|
|
|
|
/*
|
|
* mp is stored in the fs_context when it is initialized.
|
|
* mp is transferred to the superblock on a successful mount,
|
|
* but if an error occurs before the transfer we have to free
|
|
* it here.
|
|
*/
|
|
if (mp)
|
|
xfs_mount_free(mp);
|
|
}
|
|
|
|
static const struct fs_context_operations xfs_context_ops = {
|
|
.parse_param = xfs_fs_parse_param,
|
|
.get_tree = xfs_fs_get_tree,
|
|
.reconfigure = xfs_fs_reconfigure,
|
|
.free = xfs_fs_free,
|
|
};
|
|
|
|
static int xfs_init_fs_context(
|
|
struct fs_context *fc)
|
|
{
|
|
struct xfs_mount *mp;
|
|
|
|
mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
|
|
if (!mp)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&mp->m_sb_lock);
|
|
INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
|
|
spin_lock_init(&mp->m_perag_lock);
|
|
mutex_init(&mp->m_growlock);
|
|
INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);
|
|
INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
|
|
mp->m_kobj.kobject.kset = xfs_kset;
|
|
/*
|
|
* We don't create the finobt per-ag space reservation until after log
|
|
* recovery, so we must set this to true so that an ifree transaction
|
|
* started during log recovery will not depend on space reservations
|
|
* for finobt expansion.
|
|
*/
|
|
mp->m_finobt_nores = true;
|
|
|
|
/*
|
|
* These can be overridden by the mount option parsing.
|
|
*/
|
|
mp->m_logbufs = -1;
|
|
mp->m_logbsize = -1;
|
|
mp->m_allocsize_log = 16; /* 64k */
|
|
|
|
/*
|
|
* Copy binary VFS mount flags we are interested in.
|
|
*/
|
|
if (fc->sb_flags & SB_RDONLY)
|
|
set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
|
|
if (fc->sb_flags & SB_DIRSYNC)
|
|
mp->m_features |= XFS_FEAT_DIRSYNC;
|
|
if (fc->sb_flags & SB_SYNCHRONOUS)
|
|
mp->m_features |= XFS_FEAT_WSYNC;
|
|
|
|
fc->s_fs_info = mp;
|
|
fc->ops = &xfs_context_ops;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct file_system_type xfs_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "xfs",
|
|
.init_fs_context = xfs_init_fs_context,
|
|
.parameters = xfs_fs_parameters,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
|
|
};
|
|
MODULE_ALIAS_FS("xfs");
|
|
|
|
STATIC int __init
|
|
xfs_init_caches(void)
|
|
{
|
|
int error;
|
|
|
|
xfs_buf_cache = kmem_cache_create("xfs_buf", sizeof(struct xfs_buf), 0,
|
|
SLAB_HWCACHE_ALIGN |
|
|
SLAB_RECLAIM_ACCOUNT |
|
|
SLAB_MEM_SPREAD,
|
|
NULL);
|
|
if (!xfs_buf_cache)
|
|
goto out;
|
|
|
|
xfs_log_ticket_cache = kmem_cache_create("xfs_log_ticket",
|
|
sizeof(struct xlog_ticket),
|
|
0, 0, NULL);
|
|
if (!xfs_log_ticket_cache)
|
|
goto out_destroy_buf_cache;
|
|
|
|
error = xfs_btree_init_cur_caches();
|
|
if (error)
|
|
goto out_destroy_log_ticket_cache;
|
|
|
|
error = xfs_defer_init_item_caches();
|
|
if (error)
|
|
goto out_destroy_btree_cur_cache;
|
|
|
|
xfs_da_state_cache = kmem_cache_create("xfs_da_state",
|
|
sizeof(struct xfs_da_state),
|
|
0, 0, NULL);
|
|
if (!xfs_da_state_cache)
|
|
goto out_destroy_defer_item_cache;
|
|
|
|
xfs_ifork_cache = kmem_cache_create("xfs_ifork",
|
|
sizeof(struct xfs_ifork),
|
|
0, 0, NULL);
|
|
if (!xfs_ifork_cache)
|
|
goto out_destroy_da_state_cache;
|
|
|
|
xfs_trans_cache = kmem_cache_create("xfs_trans",
|
|
sizeof(struct xfs_trans),
|
|
0, 0, NULL);
|
|
if (!xfs_trans_cache)
|
|
goto out_destroy_ifork_cache;
|
|
|
|
|
|
/*
|
|
* The size of the cache-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_cache = kmem_cache_create("xfs_buf_item",
|
|
sizeof(struct xfs_buf_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_buf_item_cache)
|
|
goto out_destroy_trans_cache;
|
|
|
|
xfs_efd_cache = kmem_cache_create("xfs_efd_item",
|
|
xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_efd_cache)
|
|
goto out_destroy_buf_item_cache;
|
|
|
|
xfs_efi_cache = kmem_cache_create("xfs_efi_item",
|
|
xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_efi_cache)
|
|
goto out_destroy_efd_cache;
|
|
|
|
xfs_inode_cache = kmem_cache_create("xfs_inode",
|
|
sizeof(struct xfs_inode), 0,
|
|
(SLAB_HWCACHE_ALIGN |
|
|
SLAB_RECLAIM_ACCOUNT |
|
|
SLAB_MEM_SPREAD | SLAB_ACCOUNT),
|
|
xfs_fs_inode_init_once);
|
|
if (!xfs_inode_cache)
|
|
goto out_destroy_efi_cache;
|
|
|
|
xfs_ili_cache = kmem_cache_create("xfs_ili",
|
|
sizeof(struct xfs_inode_log_item), 0,
|
|
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
|
|
NULL);
|
|
if (!xfs_ili_cache)
|
|
goto out_destroy_inode_cache;
|
|
|
|
xfs_icreate_cache = kmem_cache_create("xfs_icr",
|
|
sizeof(struct xfs_icreate_item),
|
|
0, 0, NULL);
|
|
if (!xfs_icreate_cache)
|
|
goto out_destroy_ili_cache;
|
|
|
|
xfs_rud_cache = kmem_cache_create("xfs_rud_item",
|
|
sizeof(struct xfs_rud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_rud_cache)
|
|
goto out_destroy_icreate_cache;
|
|
|
|
xfs_rui_cache = kmem_cache_create("xfs_rui_item",
|
|
xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_rui_cache)
|
|
goto out_destroy_rud_cache;
|
|
|
|
xfs_cud_cache = kmem_cache_create("xfs_cud_item",
|
|
sizeof(struct xfs_cud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_cud_cache)
|
|
goto out_destroy_rui_cache;
|
|
|
|
xfs_cui_cache = kmem_cache_create("xfs_cui_item",
|
|
xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_cui_cache)
|
|
goto out_destroy_cud_cache;
|
|
|
|
xfs_bud_cache = kmem_cache_create("xfs_bud_item",
|
|
sizeof(struct xfs_bud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_bud_cache)
|
|
goto out_destroy_cui_cache;
|
|
|
|
xfs_bui_cache = kmem_cache_create("xfs_bui_item",
|
|
xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_bui_cache)
|
|
goto out_destroy_bud_cache;
|
|
|
|
xfs_attrd_cache = kmem_cache_create("xfs_attrd_item",
|
|
sizeof(struct xfs_attrd_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_attrd_cache)
|
|
goto out_destroy_bui_cache;
|
|
|
|
xfs_attri_cache = kmem_cache_create("xfs_attri_item",
|
|
sizeof(struct xfs_attri_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_attri_cache)
|
|
goto out_destroy_attrd_cache;
|
|
|
|
xfs_iunlink_cache = kmem_cache_create("xfs_iul_item",
|
|
sizeof(struct xfs_iunlink_item),
|
|
0, 0, NULL);
|
|
if (!xfs_iunlink_cache)
|
|
goto out_destroy_attri_cache;
|
|
|
|
return 0;
|
|
|
|
out_destroy_attri_cache:
|
|
kmem_cache_destroy(xfs_attri_cache);
|
|
out_destroy_attrd_cache:
|
|
kmem_cache_destroy(xfs_attrd_cache);
|
|
out_destroy_bui_cache:
|
|
kmem_cache_destroy(xfs_bui_cache);
|
|
out_destroy_bud_cache:
|
|
kmem_cache_destroy(xfs_bud_cache);
|
|
out_destroy_cui_cache:
|
|
kmem_cache_destroy(xfs_cui_cache);
|
|
out_destroy_cud_cache:
|
|
kmem_cache_destroy(xfs_cud_cache);
|
|
out_destroy_rui_cache:
|
|
kmem_cache_destroy(xfs_rui_cache);
|
|
out_destroy_rud_cache:
|
|
kmem_cache_destroy(xfs_rud_cache);
|
|
out_destroy_icreate_cache:
|
|
kmem_cache_destroy(xfs_icreate_cache);
|
|
out_destroy_ili_cache:
|
|
kmem_cache_destroy(xfs_ili_cache);
|
|
out_destroy_inode_cache:
|
|
kmem_cache_destroy(xfs_inode_cache);
|
|
out_destroy_efi_cache:
|
|
kmem_cache_destroy(xfs_efi_cache);
|
|
out_destroy_efd_cache:
|
|
kmem_cache_destroy(xfs_efd_cache);
|
|
out_destroy_buf_item_cache:
|
|
kmem_cache_destroy(xfs_buf_item_cache);
|
|
out_destroy_trans_cache:
|
|
kmem_cache_destroy(xfs_trans_cache);
|
|
out_destroy_ifork_cache:
|
|
kmem_cache_destroy(xfs_ifork_cache);
|
|
out_destroy_da_state_cache:
|
|
kmem_cache_destroy(xfs_da_state_cache);
|
|
out_destroy_defer_item_cache:
|
|
xfs_defer_destroy_item_caches();
|
|
out_destroy_btree_cur_cache:
|
|
xfs_btree_destroy_cur_caches();
|
|
out_destroy_log_ticket_cache:
|
|
kmem_cache_destroy(xfs_log_ticket_cache);
|
|
out_destroy_buf_cache:
|
|
kmem_cache_destroy(xfs_buf_cache);
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_caches(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free are flushed before we
|
|
* destroy caches.
|
|
*/
|
|
rcu_barrier();
|
|
kmem_cache_destroy(xfs_iunlink_cache);
|
|
kmem_cache_destroy(xfs_attri_cache);
|
|
kmem_cache_destroy(xfs_attrd_cache);
|
|
kmem_cache_destroy(xfs_bui_cache);
|
|
kmem_cache_destroy(xfs_bud_cache);
|
|
kmem_cache_destroy(xfs_cui_cache);
|
|
kmem_cache_destroy(xfs_cud_cache);
|
|
kmem_cache_destroy(xfs_rui_cache);
|
|
kmem_cache_destroy(xfs_rud_cache);
|
|
kmem_cache_destroy(xfs_icreate_cache);
|
|
kmem_cache_destroy(xfs_ili_cache);
|
|
kmem_cache_destroy(xfs_inode_cache);
|
|
kmem_cache_destroy(xfs_efi_cache);
|
|
kmem_cache_destroy(xfs_efd_cache);
|
|
kmem_cache_destroy(xfs_buf_item_cache);
|
|
kmem_cache_destroy(xfs_trans_cache);
|
|
kmem_cache_destroy(xfs_ifork_cache);
|
|
kmem_cache_destroy(xfs_da_state_cache);
|
|
xfs_defer_destroy_item_caches();
|
|
xfs_btree_destroy_cur_caches();
|
|
kmem_cache_destroy(xfs_log_ticket_cache);
|
|
kmem_cache_destroy(xfs_buf_cache);
|
|
}
|
|
|
|
STATIC int __init
|
|
xfs_init_workqueues(void)
|
|
{
|
|
/*
|
|
* The allocation workqueue can be used in memory reclaim situations
|
|
* (writepage path), and parallelism is only limited by the number of
|
|
* AGs in all the filesystems mounted. Hence use the default large
|
|
* max_active value for this workqueue.
|
|
*/
|
|
xfs_alloc_wq = alloc_workqueue("xfsalloc",
|
|
XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0);
|
|
if (!xfs_alloc_wq)
|
|
return -ENOMEM;
|
|
|
|
xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND),
|
|
0);
|
|
if (!xfs_discard_wq)
|
|
goto out_free_alloc_wq;
|
|
|
|
return 0;
|
|
out_free_alloc_wq:
|
|
destroy_workqueue(xfs_alloc_wq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_workqueues(void)
|
|
{
|
|
destroy_workqueue(xfs_discard_wq);
|
|
destroy_workqueue(xfs_alloc_wq);
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static int
|
|
xfs_cpu_dead(
|
|
unsigned int cpu)
|
|
{
|
|
struct xfs_mount *mp, *n;
|
|
|
|
spin_lock(&xfs_mount_list_lock);
|
|
list_for_each_entry_safe(mp, n, &xfs_mount_list, m_mount_list) {
|
|
spin_unlock(&xfs_mount_list_lock);
|
|
xfs_inodegc_cpu_dead(mp, cpu);
|
|
xlog_cil_pcp_dead(mp->m_log, cpu);
|
|
spin_lock(&xfs_mount_list_lock);
|
|
}
|
|
spin_unlock(&xfs_mount_list_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
xfs_cpu_hotplug_init(void)
|
|
{
|
|
int error;
|
|
|
|
error = cpuhp_setup_state_nocalls(CPUHP_XFS_DEAD, "xfs:dead", NULL,
|
|
xfs_cpu_dead);
|
|
if (error < 0)
|
|
xfs_alert(NULL,
|
|
"Failed to initialise CPU hotplug, error %d. XFS is non-functional.",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
static void
|
|
xfs_cpu_hotplug_destroy(void)
|
|
{
|
|
cpuhp_remove_state_nocalls(CPUHP_XFS_DEAD);
|
|
}
|
|
|
|
#else /* !CONFIG_HOTPLUG_CPU */
|
|
static inline int xfs_cpu_hotplug_init(void) { return 0; }
|
|
static inline void xfs_cpu_hotplug_destroy(void) {}
|
|
#endif
|
|
|
|
STATIC int __init
|
|
init_xfs_fs(void)
|
|
{
|
|
int error;
|
|
|
|
xfs_check_ondisk_structs();
|
|
|
|
error = xfs_dahash_test();
|
|
if (error)
|
|
return error;
|
|
|
|
printk(KERN_INFO XFS_VERSION_STRING " with "
|
|
XFS_BUILD_OPTIONS " enabled\n");
|
|
|
|
xfs_dir_startup();
|
|
|
|
error = xfs_cpu_hotplug_init();
|
|
if (error)
|
|
goto out;
|
|
|
|
error = xfs_init_caches();
|
|
if (error)
|
|
goto out_destroy_hp;
|
|
|
|
error = xfs_init_workqueues();
|
|
if (error)
|
|
goto out_destroy_caches;
|
|
|
|
error = xfs_mru_cache_init();
|
|
if (error)
|
|
goto out_destroy_wq;
|
|
|
|
error = xfs_init_procfs();
|
|
if (error)
|
|
goto out_mru_cache_uninit;
|
|
|
|
error = xfs_sysctl_register();
|
|
if (error)
|
|
goto out_cleanup_procfs;
|
|
|
|
xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
|
|
if (!xfs_kset) {
|
|
error = -ENOMEM;
|
|
goto out_sysctl_unregister;
|
|
}
|
|
|
|
xfsstats.xs_kobj.kobject.kset = xfs_kset;
|
|
|
|
xfsstats.xs_stats = alloc_percpu(struct xfsstats);
|
|
if (!xfsstats.xs_stats) {
|
|
error = -ENOMEM;
|
|
goto out_kset_unregister;
|
|
}
|
|
|
|
error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
|
|
"stats");
|
|
if (error)
|
|
goto out_free_stats;
|
|
|
|
#ifdef DEBUG
|
|
xfs_dbg_kobj.kobject.kset = xfs_kset;
|
|
error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
|
|
if (error)
|
|
goto out_remove_stats_kobj;
|
|
#endif
|
|
|
|
error = xfs_qm_init();
|
|
if (error)
|
|
goto out_remove_dbg_kobj;
|
|
|
|
error = register_filesystem(&xfs_fs_type);
|
|
if (error)
|
|
goto out_qm_exit;
|
|
return 0;
|
|
|
|
out_qm_exit:
|
|
xfs_qm_exit();
|
|
out_remove_dbg_kobj:
|
|
#ifdef DEBUG
|
|
xfs_sysfs_del(&xfs_dbg_kobj);
|
|
out_remove_stats_kobj:
|
|
#endif
|
|
xfs_sysfs_del(&xfsstats.xs_kobj);
|
|
out_free_stats:
|
|
free_percpu(xfsstats.xs_stats);
|
|
out_kset_unregister:
|
|
kset_unregister(xfs_kset);
|
|
out_sysctl_unregister:
|
|
xfs_sysctl_unregister();
|
|
out_cleanup_procfs:
|
|
xfs_cleanup_procfs();
|
|
out_mru_cache_uninit:
|
|
xfs_mru_cache_uninit();
|
|
out_destroy_wq:
|
|
xfs_destroy_workqueues();
|
|
out_destroy_caches:
|
|
xfs_destroy_caches();
|
|
out_destroy_hp:
|
|
xfs_cpu_hotplug_destroy();
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
STATIC void __exit
|
|
exit_xfs_fs(void)
|
|
{
|
|
xfs_qm_exit();
|
|
unregister_filesystem(&xfs_fs_type);
|
|
#ifdef DEBUG
|
|
xfs_sysfs_del(&xfs_dbg_kobj);
|
|
#endif
|
|
xfs_sysfs_del(&xfsstats.xs_kobj);
|
|
free_percpu(xfsstats.xs_stats);
|
|
kset_unregister(xfs_kset);
|
|
xfs_sysctl_unregister();
|
|
xfs_cleanup_procfs();
|
|
xfs_mru_cache_uninit();
|
|
xfs_destroy_workqueues();
|
|
xfs_destroy_caches();
|
|
xfs_uuid_table_free();
|
|
xfs_cpu_hotplug_destroy();
|
|
}
|
|
|
|
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");
|