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linux / linux / kernel / git / torvalds / linux.git / e56ebe27a00dee1e083621b67ec23310d8e0319a / . / fs / xfs / xfs_super.c
blob: e85a156dc17d162decc7c010a74496cb44d38d36 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_sb.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_alloc.h"
#include "xfs_fsops.h"
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_dir2.h"
#include "xfs_extfree_item.h"
#include "xfs_mru_cache.h"
#include "xfs_inode_item.h"
#include "xfs_icache.h"
#include "xfs_trace.h"
#include "xfs_icreate_item.h"
#include "xfs_filestream.h"
#include "xfs_quota.h"
#include "xfs_sysfs.h"
#include "xfs_ondisk.h"
#include "xfs_rmap_item.h"
#include "xfs_refcount_item.h"
#include "xfs_bmap_item.h"
#include "xfs_reflink.h"
#include "xfs_pwork.h"
#include "xfs_ag.h"
#include "xfs_defer.h"
#include "xfs_attr_item.h"
#include "xfs_xattr.h"
#include "xfs_iunlink_item.h"
#include "xfs_dahash_test.h"
#include "xfs_rtbitmap.h"
#include "xfs_exchmaps_item.h"
#include "xfs_parent.h"
#include "xfs_rtalloc.h"
#include "xfs_zone_alloc.h"
#include "scrub/stats.h"
#include "scrub/rcbag_btree.h"
#include <linux/magic.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
static const struct super_operations xfs_super_operations;
static struct dentry *xfs_debugfs; /* top-level xfs debugfs dir */
static struct kset *xfs_kset; /* top-level xfs sysfs dir */
#ifdef DEBUG
static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
#endif
enum xfs_dax_mode {
XFS_DAX_INODE = 0,
XFS_DAX_ALWAYS = 1,
XFS_DAX_NEVER = 2,
};
/* Were quota mount options provided? Must use the upper 16 bits of qflags. */
#define XFS_QFLAGS_MNTOPTS (1U << 31)
static void
xfs_mount_set_dax_mode(
struct xfs_mount *mp,
enum xfs_dax_mode mode)
{
switch (mode) {
case XFS_DAX_INODE:
mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
break;
case XFS_DAX_ALWAYS:
mp->m_features |= XFS_FEAT_DAX_ALWAYS;
mp->m_features &= ~XFS_FEAT_DAX_NEVER;
break;
case XFS_DAX_NEVER:
mp->m_features |= XFS_FEAT_DAX_NEVER;
mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
break;
}
}
static const struct constant_table dax_param_enums[] = {
{"inode", XFS_DAX_INODE },
{"always", XFS_DAX_ALWAYS },
{"never", XFS_DAX_NEVER },
{}
};
/*
* Table driven mount option parser.
*/
enum {
Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32,
Opt_largeio, Opt_nolargeio,
Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, Opt_max_open_zones,
Opt_lifetime, Opt_nolifetime, Opt_max_atomic_write,
};
static const struct fs_parameter_spec xfs_fs_parameters[] = {
fsparam_u32("logbufs", Opt_logbufs),
fsparam_string("logbsize", Opt_logbsize),
fsparam_string("logdev", Opt_logdev),
fsparam_string("rtdev", Opt_rtdev),
fsparam_flag("wsync", Opt_wsync),
fsparam_flag("noalign", Opt_noalign),
fsparam_flag("swalloc", Opt_swalloc),
fsparam_u32("sunit", Opt_sunit),
fsparam_u32("swidth", Opt_swidth),
fsparam_flag("nouuid", Opt_nouuid),
fsparam_flag("grpid", Opt_grpid),
fsparam_flag("nogrpid", Opt_nogrpid),
fsparam_flag("bsdgroups", Opt_bsdgroups),
fsparam_flag("sysvgroups", Opt_sysvgroups),
fsparam_string("allocsize", Opt_allocsize),
fsparam_flag("norecovery", Opt_norecovery),
fsparam_flag("inode64", Opt_inode64),
fsparam_flag("inode32", Opt_inode32),
fsparam_flag("largeio", Opt_largeio),
fsparam_flag("nolargeio", Opt_nolargeio),
fsparam_flag("filestreams", Opt_filestreams),
fsparam_flag("quota", Opt_quota),
fsparam_flag("noquota", Opt_noquota),
fsparam_flag("usrquota", Opt_usrquota),
fsparam_flag("grpquota", Opt_grpquota),
fsparam_flag("prjquota", Opt_prjquota),
fsparam_flag("uquota", Opt_uquota),
fsparam_flag("gquota", Opt_gquota),
fsparam_flag("pquota", Opt_pquota),
fsparam_flag("uqnoenforce", Opt_uqnoenforce),
fsparam_flag("gqnoenforce", Opt_gqnoenforce),
fsparam_flag("pqnoenforce", Opt_pqnoenforce),
fsparam_flag("qnoenforce", Opt_qnoenforce),
fsparam_flag("discard", Opt_discard),
fsparam_flag("nodiscard", Opt_nodiscard),
fsparam_flag("dax", Opt_dax),
fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
fsparam_u32("max_open_zones", Opt_max_open_zones),
fsparam_flag("lifetime", Opt_lifetime),
fsparam_flag("nolifetime", Opt_nolifetime),
fsparam_string("max_atomic_write", Opt_max_atomic_write),
{}
};
struct proc_xfs_info {
uint64_t flag;
char *str;
};
static int
xfs_fs_show_options(
struct seq_file *m,
struct dentry *root)
{
static struct proc_xfs_info xfs_info_set[] = {
/* the few simple ones we can get from the mount struct */
{ XFS_FEAT_WSYNC, ",wsync" },
{ XFS_FEAT_NOALIGN, ",noalign" },
{ XFS_FEAT_SWALLOC, ",swalloc" },
{ XFS_FEAT_NOUUID, ",nouuid" },
{ XFS_FEAT_NORECOVERY, ",norecovery" },
{ XFS_FEAT_FILESTREAMS, ",filestreams" },
{ XFS_FEAT_GRPID, ",grpid" },
{ XFS_FEAT_DISCARD, ",discard" },
{ XFS_FEAT_LARGE_IOSIZE, ",largeio" },
{ XFS_FEAT_DAX_ALWAYS, ",dax=always" },
{ XFS_FEAT_DAX_NEVER, ",dax=never" },
{ XFS_FEAT_NOLIFETIME, ",nolifetime" },
{ 0, NULL }
};
struct xfs_mount *mp = XFS_M(root->d_sb);
struct proc_xfs_info *xfs_infop;
for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
if (mp->m_features & xfs_infop->flag)
seq_puts(m, xfs_infop->str);
}
seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64);
if (xfs_has_allocsize(mp))
seq_printf(m, ",allocsize=%dk",
(1 << mp->m_allocsize_log) >> 10);
if (mp->m_logbufs > 0)
seq_printf(m, ",logbufs=%d", mp->m_logbufs);
if (mp->m_logbsize > 0)
seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
if (mp->m_logname)
seq_show_option(m, "logdev", mp->m_logname);
if (mp->m_rtname)
seq_show_option(m, "rtdev", mp->m_rtname);
if (mp->m_dalign > 0)
seq_printf(m, ",sunit=%d",
(int)XFS_FSB_TO_BB(mp, mp->m_dalign));
if (mp->m_swidth > 0)
seq_printf(m, ",swidth=%d",
(int)XFS_FSB_TO_BB(mp, mp->m_swidth));
if (mp->m_qflags & XFS_UQUOTA_ENFD)
seq_puts(m, ",usrquota");
else if (mp->m_qflags & XFS_UQUOTA_ACCT)
seq_puts(m, ",uqnoenforce");
if (mp->m_qflags & XFS_PQUOTA_ENFD)
seq_puts(m, ",prjquota");
else if (mp->m_qflags & XFS_PQUOTA_ACCT)
seq_puts(m, ",pqnoenforce");
if (mp->m_qflags & XFS_GQUOTA_ENFD)
seq_puts(m, ",grpquota");
else if (mp->m_qflags & XFS_GQUOTA_ACCT)
seq_puts(m, ",gqnoenforce");
if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
seq_puts(m, ",noquota");
if (mp->m_max_open_zones)
seq_printf(m, ",max_open_zones=%u", mp->m_max_open_zones);
if (mp->m_awu_max_bytes)
seq_printf(m, ",max_atomic_write=%lluk",
mp->m_awu_max_bytes >> 10);
return 0;
}
static bool
xfs_set_inode_alloc_perag(
struct xfs_perag *pag,
xfs_ino_t ino,
xfs_agnumber_t max_metadata)
{
if (!xfs_is_inode32(pag_mount(pag))) {
set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
return false;
}
if (ino > XFS_MAXINUMBER_32) {
clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
return false;
}
set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
if (pag_agno(pag) < max_metadata)
set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
else
clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
return true;
}
/*
* Set parameters for inode allocation heuristics, taking into account
* filesystem size and inode32/inode64 mount options; i.e. specifically
* whether or not XFS_FEAT_SMALL_INUMS is set.
*
* Inode allocation patterns are altered only if inode32 is requested
* (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
* If altered, XFS_OPSTATE_INODE32 is set as well.
*
* An agcount independent of that in the mount structure is provided
* because in the growfs case, mp->m_sb.sb_agcount is not yet updated
* to the potentially higher ag count.
*
* Returns the maximum AG index which may contain inodes.
*/
xfs_agnumber_t
xfs_set_inode_alloc(
struct xfs_mount *mp,
xfs_agnumber_t agcount)
{
xfs_agnumber_t index;
xfs_agnumber_t maxagi = 0;
xfs_sb_t *sbp = &mp->m_sb;
xfs_agnumber_t max_metadata;
xfs_agino_t agino;
xfs_ino_t ino;
/*
* Calculate how much should be reserved for inodes to meet
* the max inode percentage. Used only for inode32.
*/
if (M_IGEO(mp)->maxicount) {
uint64_t icount;
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
icount += sbp->sb_agblocks - 1;
do_div(icount, sbp->sb_agblocks);
max_metadata = icount;
} else {
max_metadata = agcount;
}
/* Get the last possible inode in the filesystem */
agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
/*
* If user asked for no more than 32-bit inodes, and the fs is
* sufficiently large, set XFS_OPSTATE_INODE32 if we must alter
* the allocator to accommodate the request.
*/
if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
xfs_set_inode32(mp);
else
xfs_clear_inode32(mp);
for (index = 0; index < agcount; index++) {
struct xfs_perag *pag;
ino = XFS_AGINO_TO_INO(mp, index, agino);
pag = xfs_perag_get(mp, index);
if (xfs_set_inode_alloc_perag(pag, ino, max_metadata))
maxagi++;
xfs_perag_put(pag);
}
return xfs_is_inode32(mp) ? maxagi : agcount;
}
static int
xfs_setup_dax_always(
struct xfs_mount *mp)
{
if (!mp->m_ddev_targp->bt_daxdev &&
(!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) {
xfs_alert(mp,
"DAX unsupported by block device. Turning off DAX.");
goto disable_dax;
}
if (mp->m_super->s_blocksize != PAGE_SIZE) {
xfs_alert(mp,
"DAX not supported for blocksize. Turning off DAX.");
goto disable_dax;
}
if (xfs_has_reflink(mp) &&
bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
xfs_alert(mp,
"DAX and reflink cannot work with multi-partitions!");
return -EINVAL;
}
return 0;
disable_dax:
xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
return 0;
}
STATIC int
xfs_blkdev_get(
xfs_mount_t *mp,
const char *name,
struct file **bdev_filep)
{
int error = 0;
blk_mode_t mode;
mode = sb_open_mode(mp->m_super->s_flags);
*bdev_filep = bdev_file_open_by_path(name, mode,
mp->m_super, &fs_holder_ops);
if (IS_ERR(*bdev_filep)) {
error = PTR_ERR(*bdev_filep);
*bdev_filep = NULL;
xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
}
return error;
}
STATIC void
xfs_shutdown_devices(
struct xfs_mount *mp)
{
/*
* Udev is triggered whenever anyone closes a block device or unmounts
* a file systemm on a block device.
* The default udev rules invoke blkid to read the fs super and create
* symlinks to the bdev under /dev/disk. For this, it uses buffered
* reads through the page cache.
*
* xfs_db also uses buffered reads to examine metadata. There is no
* coordination between xfs_db and udev, which means that they can run
* concurrently. Note there is no coordination between the kernel and
* blkid either.
*
* On a system with 64k pages, the page cache can cache the superblock
* and the root inode (and hence the root directory) with the same 64k
* page. If udev spawns blkid after the mkfs and the system is busy
* enough that it is still running when xfs_db starts up, they'll both
* read from the same page in the pagecache.
*
* The unmount writes updated inode metadata to disk directly. The XFS
* buffer cache does not use the bdev pagecache, so it needs to
* invalidate that pagecache on unmount. If the above scenario occurs,
* the pagecache no longer reflects what's on disk, xfs_db reads the
* stale metadata, and fails to find /a. Most of the time this succeeds
* because closing a bdev invalidates the page cache, but when processes
* race, everyone loses.
*/
if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
blkdev_issue_flush(mp->m_logdev_targp->bt_bdev);
invalidate_bdev(mp->m_logdev_targp->bt_bdev);
}
if (mp->m_rtdev_targp) {
blkdev_issue_flush(mp->m_rtdev_targp->bt_bdev);
invalidate_bdev(mp->m_rtdev_targp->bt_bdev);
}
blkdev_issue_flush(mp->m_ddev_targp->bt_bdev);
invalidate_bdev(mp->m_ddev_targp->bt_bdev);
}
/*
* 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 super_block *sb = mp->m_super;
struct block_device *ddev = sb->s_bdev;
struct file *logdev_file = NULL, *rtdev_file = 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_file);
if (error)
return error;
}
if (mp->m_rtname) {
error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev_file);
if (error)
goto out_close_logdev;
if (file_bdev(rtdev_file) == ddev ||
(logdev_file &&
file_bdev(rtdev_file) == file_bdev(logdev_file))) {
xfs_warn(mp,
"Cannot mount filesystem with identical rtdev and ddev/logdev.");
error = -EINVAL;
goto out_close_rtdev;
}
}
/*
* Setup xfs_mount buffer target pointers
*/
mp->m_ddev_targp = xfs_alloc_buftarg(mp, sb->s_bdev_file);
if (IS_ERR(mp->m_ddev_targp)) {
error = PTR_ERR(mp->m_ddev_targp);
mp->m_ddev_targp = NULL;
goto out_close_rtdev;
}
if (rtdev_file) {
mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev_file);
if (IS_ERR(mp->m_rtdev_targp)) {
error = PTR_ERR(mp->m_rtdev_targp);
mp->m_rtdev_targp = NULL;
goto out_free_ddev_targ;
}
}
if (logdev_file && file_bdev(logdev_file) != ddev) {
mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev_file);
if (IS_ERR(mp->m_logdev_targp)) {
error = PTR_ERR(mp->m_logdev_targp);
mp->m_logdev_targp = NULL;
goto out_free_rtdev_targ;
}
} else {
mp->m_logdev_targp = mp->m_ddev_targp;
/* Handle won't be used, drop it */
if (logdev_file)
bdev_fput(logdev_file);
}
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:
if (rtdev_file)
bdev_fput(rtdev_file);
out_close_logdev:
if (logdev_file)
bdev_fput(logdev_file);
return error;
}
/*
* Setup xfs_mount buffer target pointers based on superblock
*/
STATIC int
xfs_setup_devices(
struct xfs_mount *mp)
{
int error;
error = xfs_configure_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize,
mp->m_sb.sb_dblocks);
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_configure_buftarg(mp->m_logdev_targp,
log_sector_size, mp->m_sb.sb_logblocks);
if (error)
return error;
}
if (mp->m_sb.sb_rtstart) {
if (mp->m_rtdev_targp) {
xfs_warn(mp,
"can't use internal and external rtdev at the same time");
return -EINVAL;
}
mp->m_rtdev_targp = mp->m_ddev_targp;
} else if (mp->m_rtname) {
error = xfs_configure_buftarg(mp->m_rtdev_targp,
mp->m_sb.sb_sectsize, mp->m_sb.sb_rblocks);
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 | WQ_PERCPU),
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 | WQ_PERCPU),
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 | WQ_PERCPU),
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 | WQ_PERCPU),
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 | WQ_PERCPU), 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);
init_rwsem(&ip->i_lock);
}
/*
* 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 inode_generic_drop(inode);
}
STATIC void
xfs_fs_evict_inode(
struct inode *inode)
{
if (IS_DAX(inode))
dax_break_layout_final(inode);
truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
}
static void
xfs_mount_free(
struct xfs_mount *mp)
{
if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
xfs_free_buftarg(mp->m_logdev_targp);
if (mp->m_rtdev_targp && mp->m_rtdev_targp != mp->m_ddev_targp)
xfs_free_buftarg(mp->m_rtdev_targp);
if (mp->m_ddev_targp)
xfs_free_buftarg(mp->m_ddev_targp);
debugfs_remove(mp->m_debugfs);
kfree(mp->m_rtname);
kfree(mp->m_logname);
kfree(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);
xfs_zone_gc_stop(mp);
}
return 0;
}
static xfs_extlen_t
xfs_internal_log_size(
struct xfs_mount *mp)
{
if (!mp->m_sb.sb_logstart)
return 0;
return mp->m_sb.sb_logblocks;
}
static void
xfs_statfs_data(
struct xfs_mount *mp,
struct kstatfs *st)
{
int64_t fdblocks =
xfs_sum_freecounter(mp, XC_FREE_BLOCKS);
/* make sure st->f_bfree does not underflow */
st->f_bfree = max(0LL,
fdblocks - xfs_freecounter_unavailable(mp, XC_FREE_BLOCKS));
/*
* sb_dblocks can change during growfs, but nothing cares about reporting
* the old or new value during growfs.
*/
st->f_blocks = mp->m_sb.sb_dblocks - xfs_internal_log_size(mp);
}
/*
* When stat(v)fs is called on a file with the realtime bit set or a directory
* with the rtinherit bit, report freespace information for the RT device
* instead of the main data device.
*/
static void
xfs_statfs_rt(
struct xfs_mount *mp,
struct kstatfs *st)
{
st->f_bfree = xfs_rtbxlen_to_blen(mp,
xfs_sum_freecounter(mp, XC_FREE_RTEXTENTS));
st->f_blocks = mp->m_sb.sb_rblocks - xfs_rtbxlen_to_blen(mp,
mp->m_free[XC_FREE_RTEXTENTS].res_total);
}
static void
xfs_statfs_inodes(
struct xfs_mount *mp,
struct kstatfs *st)
{
uint64_t icount = percpu_counter_sum(&mp->m_icount);
uint64_t ifree = percpu_counter_sum(&mp->m_ifree);
uint64_t fakeinos = XFS_FSB_TO_INO(mp, st->f_bfree);
st->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
if (M_IGEO(mp)->maxicount)
st->f_files = min_t(typeof(st->f_files), st->f_files,
M_IGEO(mp)->maxicount);
/* If sb_icount overshot maxicount, report actual allocation */
st->f_files = max_t(typeof(st->f_files), st->f_files,
mp->m_sb.sb_icount);
/* Make sure st->f_ffree does not underflow */
st->f_ffree = max_t(int64_t, 0, st->f_files - (icount - ifree));
}
STATIC int
xfs_fs_statfs(
struct dentry *dentry,
struct kstatfs *st)
{
struct xfs_mount *mp = XFS_M(dentry->d_sb);
struct xfs_inode *ip = XFS_I(d_inode(dentry));
/*
* 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);
st->f_type = XFS_SUPER_MAGIC;
st->f_namelen = MAXNAMELEN - 1;
st->f_bsize = mp->m_sb.sb_blocksize;
st->f_fsid = u64_to_fsid(huge_encode_dev(mp->m_ddev_targp->bt_dev));
xfs_statfs_data(mp, st);
xfs_statfs_inodes(mp, st);
if (XFS_IS_REALTIME_MOUNT(mp) &&
(ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME)))
xfs_statfs_rt(mp, st);
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, st);
/*
* XFS does not distinguish between blocks available to privileged and
* unprivileged users.
*/
st->f_bavail = st->f_bfree;
return 0;
}
STATIC void
xfs_save_resvblks(
struct xfs_mount *mp)
{
enum xfs_free_counter i;
for (i = 0; i < XC_FREE_NR; i++) {
mp->m_free[i].res_saved = mp->m_free[i].res_total;
xfs_reserve_blocks(mp, i, 0);
}
}
STATIC void
xfs_restore_resvblks(
struct xfs_mount *mp)
{
uint64_t resblks;
enum xfs_free_counter i;
for (i = 0; i < XC_FREE_NR; i++) {
if (mp->m_free[i].res_saved) {
resblks = mp->m_free[i].res_saved;
mp->m_free[i].res_saved = 0;
} else
resblks = xfs_default_resblks(mp, i);
xfs_reserve_blocks(mp, i, resblks);
}
}
/*
* 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);
xfs_zone_gc_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_zone_gc_start(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;
}
}
/*
* 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;
}
if (!xfs_has_zoned(mp)) {
if (mp->m_max_open_zones) {
xfs_warn(mp,
"max_open_zones mount option only supported on zoned file systems.");
return -EINVAL;
}
if (mp->m_features & XFS_FEAT_NOLIFETIME) {
xfs_warn(mp,
"nolifetime mount option only supported on zoned file systems.");
return -EINVAL;
}
}
return 0;
}
static int
xfs_init_percpu_counters(
struct xfs_mount *mp)
{
int error;
int i;
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_delalloc_blks, 0, GFP_KERNEL);
if (error)
goto free_ifree;
error = percpu_counter_init(&mp->m_delalloc_rtextents, 0, GFP_KERNEL);
if (error)
goto free_delalloc;
for (i = 0; i < XC_FREE_NR; i++) {
error = percpu_counter_init(&mp->m_free[i].count, 0,
GFP_KERNEL);
if (error)
goto free_freecounters;
}
return 0;
free_freecounters:
while (--i >= 0)
percpu_counter_destroy(&mp->m_free[i].count);
percpu_counter_destroy(&mp->m_delalloc_rtextents);
free_delalloc:
percpu_counter_destroy(&mp->m_delalloc_blks);
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);
xfs_set_freecounter(mp, XC_FREE_BLOCKS, mp->m_sb.sb_fdblocks);
if (!xfs_has_zoned(mp))
xfs_set_freecounter(mp, XC_FREE_RTEXTENTS,
mp->m_sb.sb_frextents);
}
static void
xfs_destroy_percpu_counters(
struct xfs_mount *mp)
{
enum xfs_free_counter i;
for (i = 0; i < XC_FREE_NR; i++)
percpu_counter_destroy(&mp->m_free[i].count);
percpu_counter_destroy(&mp->m_icount);
percpu_counter_destroy(&mp->m_ifree);
ASSERT(xfs_is_shutdown(mp) ||
percpu_counter_sum(&mp->m_delalloc_rtextents) == 0);
percpu_counter_destroy(&mp->m_delalloc_rtextents);
ASSERT(xfs_is_shutdown(mp) ||
percpu_counter_sum(&mp->m_delalloc_blks) == 0);
percpu_counter_destroy(&mp->m_delalloc_blks);
}
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);
gc->cpu = cpu;
gc->mp = mp;
init_llist_head(&gc->list);
gc->items = 0;
gc->error = 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);
xfs_notice(mp, "Unmounting Filesystem %pU", &mp->m_sb.sb_uuid);
xfs_filestream_unmount(mp);
xfs_unmountfs(mp);
xfs_rtmount_freesb(mp);
xfs_freesb(mp);
xchk_mount_stats_free(mp);
free_percpu(mp->m_stats.xs_stats);
xfs_inodegc_free_percpu(mp);
xfs_destroy_percpu_counters(mp);
xfs_destroy_mount_workqueues(mp);
xfs_shutdown_devices(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 void
xfs_fs_shutdown(
struct super_block *sb)
{
xfs_force_shutdown(XFS_M(sb), SHUTDOWN_DEVICE_REMOVED);
}
static int
xfs_fs_show_stats(
struct seq_file *m,
struct dentry *root)
{
struct xfs_mount *mp = XFS_M(root->d_sb);
if (xfs_has_zoned(mp) && IS_ENABLED(CONFIG_XFS_RT))
xfs_zoned_show_stats(m, mp);
return 0;
}
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,
.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,
.show_options = xfs_fs_show_options,
.nr_cached_objects = xfs_fs_nr_cached_objects,
.free_cached_objects = xfs_fs_free_cached_objects,
.shutdown = xfs_fs_shutdown,
.show_stats = xfs_fs_show_stats,
};
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 int
suffix_kstrtoull(
const char *s,
unsigned int base,
unsigned long long *res)
{
int last, shift_left_factor = 0;
unsigned long long _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 (kstrtoull(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;
BUILD_BUG_ON(XFS_QFLAGS_MNTOPTS & XFS_MOUNT_QUOTA_ALL);
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;
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_quota:
case Opt_uquota:
case Opt_usrquota:
parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD);
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_qnoenforce:
case Opt_uqnoenforce:
parsing_mp->m_qflags |= XFS_UQUOTA_ACCT;
parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_pquota:
case Opt_prjquota:
parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD);
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_pqnoenforce:
parsing_mp->m_qflags |= XFS_PQUOTA_ACCT;
parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_gquota:
case Opt_grpquota:
parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD);
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
return 0;
case Opt_gqnoenforce:
parsing_mp->m_qflags |= XFS_GQUOTA_ACCT;
parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
parsing_mp->m_qflags |= XFS_QFLAGS_MNTOPTS;
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_max_open_zones:
parsing_mp->m_max_open_zones = result.uint_32;
return 0;
case Opt_lifetime:
parsing_mp->m_features &= ~XFS_FEAT_NOLIFETIME;
return 0;
case Opt_nolifetime:
parsing_mp->m_features |= XFS_FEAT_NOLIFETIME;
return 0;
case Opt_max_atomic_write:
if (suffix_kstrtoull(param->string, 10,
&parsing_mp->m_awu_max_bytes)) {
xfs_warn(parsing_mp,
"max atomic write size must be positive integer");
return -EINVAL;
}
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;
}
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 & ~XFS_QFLAGS_MNTOPTS)) {
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;
}
struct dentry *
xfs_debugfs_mkdir(
const char *name,
struct dentry *parent)
{
struct dentry *child;
/* Apparently we're expected to ignore error returns?? */
child = debugfs_create_dir(name, parent);
if (IS_ERR(child))
return NULL;
return child;
}
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;
/*
* Copy VFS mount flags from the context now that all parameter parsing
* is guaranteed to have been completed by either the old mount API or
* the newer fsopen/fsconfig API.
*/
if (fc->sb_flags & SB_RDONLY)
xfs_set_readonly(mp);
if (fc->sb_flags & SB_DIRSYNC)
mp->m_features |= XFS_FEAT_DIRSYNC;
if (fc->sb_flags & SB_SYNCHRONOUS)
mp->m_features |= XFS_FEAT_WSYNC;
error = xfs_fs_validate_params(mp);
if (error)
return error;
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)
return error;
if (xfs_debugfs) {
mp->m_debugfs = xfs_debugfs_mkdir(mp->m_super->s_id,
xfs_debugfs);
} else {
mp->m_debugfs = NULL;
}
error = xfs_init_mount_workqueues(mp);
if (error)
goto out_shutdown_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;
/* 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 = xchk_mount_stats_alloc(mp);
if (error)
goto out_free_stats;
error = xfs_readsb(mp, flags);
if (error)
goto out_free_scrub_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.
*
* Note: this has to use an open coded m_features check as xfs_has_crc
* always returns false for !CONFIG_XFS_SUPPORT_V4.
*/
if (!(mp->m_features & XFS_FEAT_CRC)) {
if (!IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) {
xfs_warn(mp,
"Deprecated V4 format (crc=0) not supported by kernel.");
error = -EINVAL;
goto out_free_sb;
}
xfs_warn_once(mp,
"Deprecated V4 format (crc=0) will not be supported after September 2030.");
}
/* ASCII case insensitivity is undergoing deprecation. */
if (xfs_has_asciici(mp)) {
#ifdef CONFIG_XFS_SUPPORT_ASCII_CI
xfs_warn_once(mp,
"Deprecated ASCII case-insensitivity feature (ascii-ci=1) will not be supported after September 2030.");
#else
xfs_warn(mp,
"Deprecated ASCII case-insensitivity feature (ascii-ci=1) not supported by kernel.");
error = -EINVAL;
goto out_free_sb;
#endif
}
/*
* Filesystem claims it needs repair, so refuse the mount unless
* norecovery is also specified, in which case the filesystem can
* be mounted with no risk of further damage.
*/
if (xfs_has_needsrepair(mp) && !xfs_has_norecovery(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;
}
if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
size_t max_folio_size = mapping_max_folio_size_supported();
if (!xfs_has_crc(mp)) {
xfs_warn(mp,
"V4 Filesystem with blocksize %d bytes. Only pagesize (%ld) or less is supported.",
mp->m_sb.sb_blocksize, PAGE_SIZE);
error = -ENOSYS;
goto out_free_sb;
}
if (mp->m_sb.sb_blocksize > max_folio_size) {
xfs_warn(mp,
"block size (%u bytes) not supported; Only block size (%zu) or less is supported",
mp->m_sb.sb_blocksize, max_folio_size);
error = -ENOSYS;
goto out_free_sb;
}
xfs_warn_experimental(mp, XFS_EXPERIMENTAL_LBS);
}
/* 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_rtmount_readsb(mp);
if (error)
goto out_free_sb;
error = xfs_filestream_mount(mp);
if (error)
goto out_free_rtsb;
/*
* 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 | SB_I_ALLOW_HSM;
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_zoned(mp)) {
if (!xfs_has_metadir(mp)) {
xfs_alert(mp,
"metadir feature required for zoned realtime devices.");
error = -EINVAL;
goto out_filestream_unmount;
}
xfs_warn_experimental(mp, XFS_EXPERIMENTAL_ZONED);
} else if (xfs_has_metadir(mp)) {
xfs_warn_experimental(mp, XFS_EXPERIMENTAL_METADIR);
}
if (xfs_has_reflink(mp)) {
if (xfs_has_realtime(mp) &&
!xfs_reflink_supports_rextsize(mp, mp->m_sb.sb_rextsize)) {
xfs_alert(mp,
"reflink not compatible with realtime extent size %u!",
mp->m_sb.sb_rextsize);
error = -EINVAL;
goto out_filestream_unmount;
}
if (xfs_has_zoned(mp)) {
xfs_alert(mp,
"reflink not compatible with zoned RT 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 no quota mount options were provided, maybe we'll try to pick
* up the quota accounting and enforcement flags from the ondisk sb.
*/
if (!(mp->m_qflags & XFS_QFLAGS_MNTOPTS))
xfs_set_resuming_quotaon(mp);
mp->m_qflags &= ~XFS_QFLAGS_MNTOPTS;
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_rtsb:
xfs_rtmount_freesb(mp);
out_free_sb:
xfs_freesb(mp);
out_free_scrub_stats:
xchk_mount_stats_free(mp);
out_free_stats:
free_percpu(mp->m_stats.xs_stats);
out_destroy_inodegc:
xfs_inodegc_free_percpu(mp);
out_destroy_counters:
xfs_destroy_percpu_counters(mp);
out_destroy_workqueues:
xfs_destroy_mount_workqueues(mp);
out_shutdown_devices:
xfs_shutdown_devices(mp);
return error;
out_unmount:
xfs_filestream_unmount(mp);
xfs_unmountfs(mp);
goto out_free_rtsb;
}
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 (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp &&
xfs_readonly_buftarg(mp->m_logdev_targp)) {
xfs_warn(mp,
"ro->rw transition prohibited by read-only logdev");
return -EACCES;
}
if (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp)) {
xfs_warn(mp,
"ro->rw transition prohibited by read-only rtdev");
return -EACCES;
}
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;
}
xfs_clear_readonly(mp);
/*
* 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);
/* Restart zone reclaim */
xfs_zone_gc_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);
/* Stop zone reclaim */
xfs_zone_gc_stop(mp);
/* Free the per-AG metadata reservation pool. */
xfs_fs_unreserve_ag_blocks(mp);
/*
* 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);
xfs_set_readonly(mp);
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;
new_mp->m_qflags &= ~XFS_QFLAGS_MNTOPTS;
/* 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;
/* Validate new max_atomic_write option before making other changes */
if (mp->m_awu_max_bytes != new_mp->m_awu_max_bytes) {
error = xfs_set_max_atomic_write_opt(mp,
new_mp->m_awu_max_bytes);
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);
}
/*
* Now that mp has been modified according to the remount options, we
* do a final option validation with xfs_finish_flags() just like it is
* just like it is done during mount. We cannot use
* done during mount. We cannot use xfs_finish_flags() on new_mp as it
* contains only the user given options.
*/
error = xfs_finish_flags(mp);
if (error)
return error;
/* 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,
};
/*
* WARNING: do not initialise any parameters in this function that depend on
* mount option parsing having already been performed as this can be called from
* fsopen() before any parameters have been set.
*/
static int
xfs_init_fs_context(
struct fs_context *fc)
{
struct xfs_mount *mp;
int i;
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL | __GFP_NOFAIL);
if (!mp)
return -ENOMEM;
spin_lock_init(&mp->m_sb_lock);
for (i = 0; i < XG_TYPE_MAX; i++)
xa_init(&mp->m_groups[i].xa);
mutex_init(&mp->m_growlock);
mutex_init(&mp->m_metafile_resv_lock);
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 */
xfs_hooks_init(&mp->m_dir_update_hooks);
fc->s_fs_info = mp;
fc->ops = &xfs_context_ops;
return 0;
}
static void
xfs_kill_sb(
struct super_block *sb)
{
kill_block_super(sb);
xfs_mount_free(XFS_M(sb));
}
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 = xfs_kill_sb,
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_MGTIME |
FS_LBS,
};
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,
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 = rcbagbt_init_cur_cache();
if (error)
goto out_destroy_btree_cur_cache;
error = xfs_defer_init_item_caches();
if (error)
goto out_destroy_rcbagbt_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_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,
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;
xfs_xmd_cache = kmem_cache_create("xfs_xmd_item",
sizeof(struct xfs_xmd_log_item),
0, 0, NULL);
if (!xfs_xmd_cache)
goto out_destroy_iul_cache;
xfs_xmi_cache = kmem_cache_create("xfs_xmi_item",
sizeof(struct xfs_xmi_log_item),
0, 0, NULL);
if (!xfs_xmi_cache)
goto out_destroy_xmd_cache;
xfs_parent_args_cache = kmem_cache_create("xfs_parent_args",
sizeof(struct xfs_parent_args),
0, 0, NULL);
if (!xfs_parent_args_cache)
goto out_destroy_xmi_cache;
return 0;
out_destroy_xmi_cache:
kmem_cache_destroy(xfs_xmi_cache);
out_destroy_xmd_cache:
kmem_cache_destroy(xfs_xmd_cache);
out_destroy_iul_cache:
kmem_cache_destroy(xfs_iunlink_cache);
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_rcbagbt_cur_cache:
rcbagbt_destroy_cur_cache();
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_parent_args_cache);
kmem_cache_destroy(xfs_xmd_cache);
kmem_cache_destroy(xfs_xmi_cache);
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();
rcbagbt_destroy_cur_cache();
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 | WQ_PERCPU),
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);
}
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_init_caches();
if (error)
goto out;
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_debugfs = xfs_debugfs_mkdir("xfs", NULL);
xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
if (!xfs_kset) {
error = -ENOMEM;
goto out_debugfs_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;
error = xchk_global_stats_setup(xfs_debugfs);
if (error)
goto out_remove_stats_kobj;
#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_scrub_stats;
#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_scrub_stats:
#endif
xchk_global_stats_teardown();
out_remove_stats_kobj:
xfs_sysfs_del(&xfsstats.xs_kobj);
out_free_stats:
free_percpu(xfsstats.xs_stats);
out_kset_unregister:
kset_unregister(xfs_kset);
out_debugfs_unregister:
debugfs_remove(xfs_debugfs);
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:
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
xchk_global_stats_teardown();
xfs_sysfs_del(&xfsstats.xs_kobj);
free_percpu(xfsstats.xs_stats);
kset_unregister(xfs_kset);
debugfs_remove(xfs_debugfs);
xfs_sysctl_unregister();
xfs_cleanup_procfs();
xfs_mru_cache_uninit();
xfs_destroy_workqueues();
xfs_destroy_caches();
xfs_uuid_table_free();
}
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");