mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCYCegywAKCRCRxhvAZXjc
ouJ6AQDlf+7jCQlQdeKKoN9QDFfMzG1ooemat36EpRRTONaGuAD8D9A4sUsG4+5f
4IU5Lj9oY4DEmF8HenbWK2ZHsesL2Qg=
=yPaw
-----END PGP SIGNATURE-----
Merge tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull idmapped mounts from Christian Brauner:
"This introduces idmapped mounts which has been in the making for some
time. Simply put, different mounts can expose the same file or
directory with different ownership. This initial implementation comes
with ports for fat, ext4 and with Christoph's port for xfs with more
filesystems being actively worked on by independent people and
maintainers.
Idmapping mounts handle a wide range of long standing use-cases. Here
are just a few:
- Idmapped mounts make it possible to easily share files between
multiple users or multiple machines especially in complex
scenarios. For example, idmapped mounts will be used in the
implementation of portable home directories in
systemd-homed.service(8) where they allow users to move their home
directory to an external storage device and use it on multiple
computers where they are assigned different uids and gids. This
effectively makes it possible to assign random uids and gids at
login time.
- It is possible to share files from the host with unprivileged
containers without having to change ownership permanently through
chown(2).
- It is possible to idmap a container's rootfs and without having to
mangle every file. For example, Chromebooks use it to share the
user's Download folder with their unprivileged containers in their
Linux subsystem.
- It is possible to share files between containers with
non-overlapping idmappings.
- Filesystem that lack a proper concept of ownership such as fat can
use idmapped mounts to implement discretionary access (DAC)
permission checking.
- They allow users to efficiently changing ownership on a per-mount
basis without having to (recursively) chown(2) all files. In
contrast to chown (2) changing ownership of large sets of files is
instantenous with idmapped mounts. This is especially useful when
ownership of a whole root filesystem of a virtual machine or
container is changed. With idmapped mounts a single syscall
mount_setattr syscall will be sufficient to change the ownership of
all files.
- Idmapped mounts always take the current ownership into account as
idmappings specify what a given uid or gid is supposed to be mapped
to. This contrasts with the chown(2) syscall which cannot by itself
take the current ownership of the files it changes into account. It
simply changes the ownership to the specified uid and gid. This is
especially problematic when recursively chown(2)ing a large set of
files which is commong with the aforementioned portable home
directory and container and vm scenario.
- Idmapped mounts allow to change ownership locally, restricting it
to specific mounts, and temporarily as the ownership changes only
apply as long as the mount exists.
Several userspace projects have either already put up patches and
pull-requests for this feature or will do so should you decide to pull
this:
- systemd: In a wide variety of scenarios but especially right away
in their implementation of portable home directories.
https://systemd.io/HOME_DIRECTORY/
- container runtimes: containerd, runC, LXD:To share data between
host and unprivileged containers, unprivileged and privileged
containers, etc. The pull request for idmapped mounts support in
containerd, the default Kubernetes runtime is already up for quite
a while now: https://github.com/containerd/containerd/pull/4734
- The virtio-fs developers and several users have expressed interest
in using this feature with virtual machines once virtio-fs is
ported.
- ChromeOS: Sharing host-directories with unprivileged containers.
I've tightly synced with all those projects and all of those listed
here have also expressed their need/desire for this feature on the
mailing list. For more info on how people use this there's a bunch of
talks about this too. Here's just two recent ones:
https://www.cncf.io/wp-content/uploads/2020/12/Rootless-Containers-in-Gitpod.pdf
https://fosdem.org/2021/schedule/event/containers_idmap/
This comes with an extensive xfstests suite covering both ext4 and
xfs:
https://git.kernel.org/brauner/xfstests-dev/h/idmapped_mounts
It covers truncation, creation, opening, xattrs, vfscaps, setid
execution, setgid inheritance and more both with idmapped and
non-idmapped mounts. It already helped to discover an unrelated xfs
setgid inheritance bug which has since been fixed in mainline. It will
be sent for inclusion with the xfstests project should you decide to
merge this.
In order to support per-mount idmappings vfsmounts are marked with
user namespaces. The idmapping of the user namespace will be used to
map the ids of vfs objects when they are accessed through that mount.
By default all vfsmounts are marked with the initial user namespace.
The initial user namespace is used to indicate that a mount is not
idmapped. All operations behave as before and this is verified in the
testsuite.
Based on prior discussions we want to attach the whole user namespace
and not just a dedicated idmapping struct. This allows us to reuse all
the helpers that already exist for dealing with idmappings instead of
introducing a whole new range of helpers. In addition, if we decide in
the future that we are confident enough to enable unprivileged users
to setup idmapped mounts the permission checking can take into account
whether the caller is privileged in the user namespace the mount is
currently marked with.
The user namespace the mount will be marked with can be specified by
passing a file descriptor refering to the user namespace as an
argument to the new mount_setattr() syscall together with the new
MOUNT_ATTR_IDMAP flag. The system call follows the openat2() pattern
of extensibility.
The following conditions must be met in order to create an idmapped
mount:
- The caller must currently have the CAP_SYS_ADMIN capability in the
user namespace the underlying filesystem has been mounted in.
- The underlying filesystem must support idmapped mounts.
- The mount must not already be idmapped. This also implies that the
idmapping of a mount cannot be altered once it has been idmapped.
- The mount must be a detached/anonymous mount, i.e. it must have
been created by calling open_tree() with the OPEN_TREE_CLONE flag
and it must not already have been visible in the filesystem.
The last two points guarantee easier semantics for userspace and the
kernel and make the implementation significantly simpler.
By default vfsmounts are marked with the initial user namespace and no
behavioral or performance changes are observed.
The manpage with a detailed description can be found here:
1d7b902e28
In order to support idmapped mounts, filesystems need to be changed
and mark themselves with the FS_ALLOW_IDMAP flag in fs_flags. The
patches to convert individual filesystem are not very large or
complicated overall as can be seen from the included fat, ext4, and
xfs ports. Patches for other filesystems are actively worked on and
will be sent out separately. The xfstestsuite can be used to verify
that port has been done correctly.
The mount_setattr() syscall is motivated independent of the idmapped
mounts patches and it's been around since July 2019. One of the most
valuable features of the new mount api is the ability to perform
mounts based on file descriptors only.
Together with the lookup restrictions available in the openat2()
RESOLVE_* flag namespace which we added in v5.6 this is the first time
we are close to hardened and race-free (e.g. symlinks) mounting and
path resolution.
While userspace has started porting to the new mount api to mount
proper filesystems and create new bind-mounts it is currently not
possible to change mount options of an already existing bind mount in
the new mount api since the mount_setattr() syscall is missing.
With the addition of the mount_setattr() syscall we remove this last
restriction and userspace can now fully port to the new mount api,
covering every use-case the old mount api could. We also add the
crucial ability to recursively change mount options for a whole mount
tree, both removing and adding mount options at the same time. This
syscall has been requested multiple times by various people and
projects.
There is a simple tool available at
https://github.com/brauner/mount-idmapped
that allows to create idmapped mounts so people can play with this
patch series. I'll add support for the regular mount binary should you
decide to pull this in the following weeks:
Here's an example to a simple idmapped mount of another user's home
directory:
u1001@f2-vm:/$ sudo ./mount --idmap both:1000:1001:1 /home/ubuntu/ /mnt
u1001@f2-vm:/$ ls -al /home/ubuntu/
total 28
drwxr-xr-x 2 ubuntu ubuntu 4096 Oct 28 22:07 .
drwxr-xr-x 4 root root 4096 Oct 28 04:00 ..
-rw------- 1 ubuntu ubuntu 3154 Oct 28 22:12 .bash_history
-rw-r--r-- 1 ubuntu ubuntu 220 Feb 25 2020 .bash_logout
-rw-r--r-- 1 ubuntu ubuntu 3771 Feb 25 2020 .bashrc
-rw-r--r-- 1 ubuntu ubuntu 807 Feb 25 2020 .profile
-rw-r--r-- 1 ubuntu ubuntu 0 Oct 16 16:11 .sudo_as_admin_successful
-rw------- 1 ubuntu ubuntu 1144 Oct 28 00:43 .viminfo
u1001@f2-vm:/$ ls -al /mnt/
total 28
drwxr-xr-x 2 u1001 u1001 4096 Oct 28 22:07 .
drwxr-xr-x 29 root root 4096 Oct 28 22:01 ..
-rw------- 1 u1001 u1001 3154 Oct 28 22:12 .bash_history
-rw-r--r-- 1 u1001 u1001 220 Feb 25 2020 .bash_logout
-rw-r--r-- 1 u1001 u1001 3771 Feb 25 2020 .bashrc
-rw-r--r-- 1 u1001 u1001 807 Feb 25 2020 .profile
-rw-r--r-- 1 u1001 u1001 0 Oct 16 16:11 .sudo_as_admin_successful
-rw------- 1 u1001 u1001 1144 Oct 28 00:43 .viminfo
u1001@f2-vm:/$ touch /mnt/my-file
u1001@f2-vm:/$ setfacl -m u:1001:rwx /mnt/my-file
u1001@f2-vm:/$ sudo setcap -n 1001 cap_net_raw+ep /mnt/my-file
u1001@f2-vm:/$ ls -al /mnt/my-file
-rw-rwxr--+ 1 u1001 u1001 0 Oct 28 22:14 /mnt/my-file
u1001@f2-vm:/$ ls -al /home/ubuntu/my-file
-rw-rwxr--+ 1 ubuntu ubuntu 0 Oct 28 22:14 /home/ubuntu/my-file
u1001@f2-vm:/$ getfacl /mnt/my-file
getfacl: Removing leading '/' from absolute path names
# file: mnt/my-file
# owner: u1001
# group: u1001
user::rw-
user:u1001:rwx
group::rw-
mask::rwx
other::r--
u1001@f2-vm:/$ getfacl /home/ubuntu/my-file
getfacl: Removing leading '/' from absolute path names
# file: home/ubuntu/my-file
# owner: ubuntu
# group: ubuntu
user::rw-
user:ubuntu:rwx
group::rw-
mask::rwx
other::r--"
* tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: (41 commits)
xfs: remove the possibly unused mp variable in xfs_file_compat_ioctl
xfs: support idmapped mounts
ext4: support idmapped mounts
fat: handle idmapped mounts
tests: add mount_setattr() selftests
fs: introduce MOUNT_ATTR_IDMAP
fs: add mount_setattr()
fs: add attr_flags_to_mnt_flags helper
fs: split out functions to hold writers
namespace: only take read lock in do_reconfigure_mnt()
mount: make {lock,unlock}_mount_hash() static
namespace: take lock_mount_hash() directly when changing flags
nfs: do not export idmapped mounts
overlayfs: do not mount on top of idmapped mounts
ecryptfs: do not mount on top of idmapped mounts
ima: handle idmapped mounts
apparmor: handle idmapped mounts
fs: make helpers idmap mount aware
exec: handle idmapped mounts
would_dump: handle idmapped mounts
...
2237 lines
56 KiB
C
2237 lines
56 KiB
C
// 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 <linux/magic.h>
|
|
#include <linux/fs_context.h>
|
|
#include <linux/fs_parser.h>
|
|
|
|
static const struct super_operations xfs_super_operations;
|
|
|
|
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,
|
|
};
|
|
|
|
static void
|
|
xfs_mount_set_dax_mode(
|
|
struct xfs_mount *mp,
|
|
enum xfs_dax_mode mode)
|
|
{
|
|
switch (mode) {
|
|
case XFS_DAX_INODE:
|
|
mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER);
|
|
break;
|
|
case XFS_DAX_ALWAYS:
|
|
mp->m_flags |= XFS_MOUNT_DAX_ALWAYS;
|
|
mp->m_flags &= ~XFS_MOUNT_DAX_NEVER;
|
|
break;
|
|
case XFS_DAX_NEVER:
|
|
mp->m_flags |= XFS_MOUNT_DAX_NEVER;
|
|
mp->m_flags &= ~XFS_MOUNT_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_ikeep,
|
|
Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
|
|
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,
|
|
};
|
|
|
|
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("ikeep", Opt_ikeep),
|
|
fsparam_flag("noikeep", Opt_noikeep),
|
|
fsparam_flag("largeio", Opt_largeio),
|
|
fsparam_flag("nolargeio", Opt_nolargeio),
|
|
fsparam_flag("attr2", Opt_attr2),
|
|
fsparam_flag("noattr2", Opt_noattr2),
|
|
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),
|
|
{}
|
|
};
|
|
|
|
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_MOUNT_IKEEP, ",ikeep" },
|
|
{ XFS_MOUNT_WSYNC, ",wsync" },
|
|
{ XFS_MOUNT_NOALIGN, ",noalign" },
|
|
{ XFS_MOUNT_SWALLOC, ",swalloc" },
|
|
{ XFS_MOUNT_NOUUID, ",nouuid" },
|
|
{ XFS_MOUNT_NORECOVERY, ",norecovery" },
|
|
{ XFS_MOUNT_ATTR2, ",attr2" },
|
|
{ XFS_MOUNT_FILESTREAMS, ",filestreams" },
|
|
{ XFS_MOUNT_GRPID, ",grpid" },
|
|
{ XFS_MOUNT_DISCARD, ",discard" },
|
|
{ XFS_MOUNT_LARGEIO, ",largeio" },
|
|
{ XFS_MOUNT_DAX_ALWAYS, ",dax=always" },
|
|
{ XFS_MOUNT_DAX_NEVER, ",dax=never" },
|
|
{ 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_flags & xfs_infop->flag)
|
|
seq_puts(m, xfs_infop->str);
|
|
}
|
|
|
|
seq_printf(m, ",inode%d",
|
|
(mp->m_flags & XFS_MOUNT_SMALL_INUMS) ? 32 : 64);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
|
|
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_ACCT) {
|
|
if (mp->m_qflags & XFS_UQUOTA_ENFD)
|
|
seq_puts(m, ",usrquota");
|
|
else
|
|
seq_puts(m, ",uqnoenforce");
|
|
}
|
|
|
|
if (mp->m_qflags & XFS_PQUOTA_ACCT) {
|
|
if (mp->m_qflags & XFS_PQUOTA_ENFD)
|
|
seq_puts(m, ",prjquota");
|
|
else
|
|
seq_puts(m, ",pqnoenforce");
|
|
}
|
|
if (mp->m_qflags & XFS_GQUOTA_ACCT) {
|
|
if (mp->m_qflags & XFS_GQUOTA_ENFD)
|
|
seq_puts(m, ",grpquota");
|
|
else
|
|
seq_puts(m, ",gqnoenforce");
|
|
}
|
|
|
|
if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
|
|
seq_puts(m, ",noquota");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set parameters for inode allocation heuristics, taking into account
|
|
* filesystem size and inode32/inode64 mount options; i.e. specifically
|
|
* whether or not XFS_MOUNT_SMALL_INUMS is set.
|
|
*
|
|
* Inode allocation patterns are altered only if inode32 is requested
|
|
* (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
|
|
* If altered, XFS_MOUNT_32BITINODES 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_MOUNT_32BITINODES if we must alter
|
|
* the allocator to accommodate the request.
|
|
*/
|
|
if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
|
|
mp->m_flags |= XFS_MOUNT_32BITINODES;
|
|
else
|
|
mp->m_flags &= ~XFS_MOUNT_32BITINODES;
|
|
|
|
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 (mp->m_flags & XFS_MOUNT_32BITINODES) {
|
|
if (ino > XFS_MAXINUMBER_32) {
|
|
pag->pagi_inodeok = 0;
|
|
pag->pagf_metadata = 0;
|
|
} else {
|
|
pag->pagi_inodeok = 1;
|
|
maxagi++;
|
|
if (index < max_metadata)
|
|
pag->pagf_metadata = 1;
|
|
else
|
|
pag->pagf_metadata = 0;
|
|
}
|
|
} else {
|
|
pag->pagi_inodeok = 1;
|
|
pag->pagf_metadata = 0;
|
|
}
|
|
|
|
xfs_perag_put(pag);
|
|
}
|
|
|
|
return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_blkdev_get(
|
|
xfs_mount_t *mp,
|
|
const char *name,
|
|
struct block_device **bdevp)
|
|
{
|
|
int error = 0;
|
|
|
|
*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
|
|
mp);
|
|
if (IS_ERR(*bdevp)) {
|
|
error = PTR_ERR(*bdevp);
|
|
xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_blkdev_put(
|
|
struct block_device *bdev)
|
|
{
|
|
if (bdev)
|
|
blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
|
|
}
|
|
|
|
void
|
|
xfs_blkdev_issue_flush(
|
|
xfs_buftarg_t *buftarg)
|
|
{
|
|
blkdev_issue_flush(buftarg->bt_bdev);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_close_devices(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;
|
|
|
|
if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
|
|
struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
|
|
struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;
|
|
|
|
xfs_free_buftarg(mp->m_logdev_targp);
|
|
xfs_blkdev_put(logdev);
|
|
fs_put_dax(dax_logdev);
|
|
}
|
|
if (mp->m_rtdev_targp) {
|
|
struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
|
|
struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;
|
|
|
|
xfs_free_buftarg(mp->m_rtdev_targp);
|
|
xfs_blkdev_put(rtdev);
|
|
fs_put_dax(dax_rtdev);
|
|
}
|
|
xfs_free_buftarg(mp->m_ddev_targp);
|
|
fs_put_dax(dax_ddev);
|
|
}
|
|
|
|
/*
|
|
* 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 dax_device *dax_ddev = fs_dax_get_by_bdev(ddev);
|
|
struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL;
|
|
struct block_device *logdev = NULL, *rtdev = NULL;
|
|
int error;
|
|
|
|
/*
|
|
* Open real time and log devices - order is important.
|
|
*/
|
|
if (mp->m_logname) {
|
|
error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
|
|
if (error)
|
|
goto out;
|
|
dax_logdev = fs_dax_get_by_bdev(logdev);
|
|
}
|
|
|
|
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;
|
|
}
|
|
dax_rtdev = fs_dax_get_by_bdev(rtdev);
|
|
}
|
|
|
|
/*
|
|
* Setup xfs_mount buffer target pointers
|
|
*/
|
|
error = -ENOMEM;
|
|
mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);
|
|
if (!mp->m_ddev_targp)
|
|
goto out_close_rtdev;
|
|
|
|
if (rtdev) {
|
|
mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);
|
|
if (!mp->m_rtdev_targp)
|
|
goto out_free_ddev_targ;
|
|
}
|
|
|
|
if (logdev && logdev != ddev) {
|
|
mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_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);
|
|
fs_put_dax(dax_rtdev);
|
|
out_close_logdev:
|
|
if (logdev && logdev != ddev) {
|
|
xfs_blkdev_put(logdev);
|
|
fs_put_dax(dax_logdev);
|
|
}
|
|
out:
|
|
fs_put_dax(dax_ddev);
|
|
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_sb_version_hassector(&mp->m_sb))
|
|
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_cil_workqueue = alloc_workqueue("xfs-cil/%s",
|
|
XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND),
|
|
0, mp->m_super->s_id);
|
|
if (!mp->m_cil_workqueue)
|
|
goto out_destroy_unwritten;
|
|
|
|
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_cil;
|
|
|
|
mp->m_blockgc_workqueue = alloc_workqueue("xfs-blockgc/%s",
|
|
WQ_SYSFS | WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM,
|
|
0, mp->m_super->s_id);
|
|
if (!mp->m_blockgc_workqueue)
|
|
goto out_destroy_reclaim;
|
|
|
|
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_eofb;
|
|
|
|
return 0;
|
|
|
|
out_destroy_eofb:
|
|
destroy_workqueue(mp->m_blockgc_workqueue);
|
|
out_destroy_reclaim:
|
|
destroy_workqueue(mp->m_reclaim_workqueue);
|
|
out_destroy_cil:
|
|
destroy_workqueue(mp->m_cil_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_workqueue);
|
|
destroy_workqueue(mp->m_reclaim_workqueue);
|
|
destroy_workqueue(mp->m_cil_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;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
xfs_check_delalloc(
|
|
struct xfs_inode *ip,
|
|
int whichfork)
|
|
{
|
|
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
struct xfs_bmbt_irec got;
|
|
struct xfs_iext_cursor icur;
|
|
|
|
if (!ifp || !xfs_iext_lookup_extent(ip, ifp, 0, &icur, &got))
|
|
return;
|
|
do {
|
|
if (isnullstartblock(got.br_startblock)) {
|
|
xfs_warn(ip->i_mount,
|
|
"ino %llx %s fork has delalloc extent at [0x%llx:0x%llx]",
|
|
ip->i_ino,
|
|
whichfork == XFS_DATA_FORK ? "data" : "cow",
|
|
got.br_startoff, got.br_blockcount);
|
|
}
|
|
} while (xfs_iext_next_extent(ifp, &icur, &got));
|
|
}
|
|
#else
|
|
#define xfs_check_delalloc(ip, whichfork) do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* 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_inactive(ip);
|
|
|
|
if (!XFS_FORCED_SHUTDOWN(ip->i_mount) && ip->i_delayed_blks) {
|
|
xfs_check_delalloc(ip, XFS_DATA_FORK);
|
|
xfs_check_delalloc(ip, XFS_COW_FORK);
|
|
ASSERT(0);
|
|
}
|
|
|
|
XFS_STATS_INC(ip->i_mount, vn_reclaim);
|
|
|
|
/*
|
|
* We should never get here with one of the reclaim flags already set.
|
|
*/
|
|
ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
|
|
ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
|
|
|
|
/*
|
|
* We always use background reclaim here because even if the inode is
|
|
* clean, it still may be under IO and hence we have wait for IO
|
|
* completion to occur before we can reclaim the inode. The background
|
|
* reclaim path handles this more efficiently than we can here, so
|
|
* simply let background reclaim tear down all inodes.
|
|
*/
|
|
xfs_inode_set_reclaim_tag(ip);
|
|
}
|
|
|
|
static void
|
|
xfs_fs_dirty_inode(
|
|
struct inode *inode,
|
|
int flag)
|
|
{
|
|
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;
|
|
if (flag != I_DIRTY_SYNC || !(inode->i_state & 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_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
|
|
"xfsino", ip->i_ino);
|
|
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(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
|
|
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);
|
|
|
|
/*
|
|
* Doing anything during the async pass would be counterproductive.
|
|
*/
|
|
if (!wait)
|
|
return 0;
|
|
|
|
xfs_log_force(mp, XFS_LOG_SYNC);
|
|
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);
|
|
}
|
|
|
|
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;
|
|
|
|
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, fdblocks - mp->m_alloc_set_aside, 0);
|
|
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_d.di_flags & 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_d.di_flags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
|
|
statp->f_blocks = sbp->sb_rblocks;
|
|
statp->f_bavail = statp->f_bfree =
|
|
sbp->sb_frextents * 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_blockgc_stop(mp);
|
|
xfs_save_resvblks(mp);
|
|
ret = xfs_log_quiesce(mp);
|
|
memalloc_nofs_restore(flags);
|
|
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);
|
|
xfs_blockgc_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)
|
|
{
|
|
int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
|
|
|
|
/* Fail a mount where the logbuf is smaller than the log stripe */
|
|
if (xfs_sb_version_haslogv2(&mp->m_sb)) {
|
|
if (mp->m_logbsize <= 0 &&
|
|
mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
|
|
mp->m_logbsize = mp->m_sb.sb_logsunit;
|
|
} else if (mp->m_logbsize > 0 &&
|
|
mp->m_logbsize < mp->m_sb.sb_logsunit) {
|
|
xfs_warn(mp,
|
|
"logbuf size must be greater than or equal to log stripe size");
|
|
return -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_sb_version_hascrc(&mp->m_sb) &&
|
|
(mp->m_flags & XFS_MOUNT_NOATTR2)) {
|
|
xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
|
|
"attr2 is always enabled for V5 filesystems.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* mkfs'ed attr2 will turn on attr2 mount unless explicitly
|
|
* told by noattr2 to turn it off
|
|
*/
|
|
if (xfs_sb_version_hasattr2(&mp->m_sb) &&
|
|
!(mp->m_flags & XFS_MOUNT_NOATTR2))
|
|
mp->m_flags |= XFS_MOUNT_ATTR2;
|
|
|
|
/*
|
|
* prohibit r/w mounts of read-only filesystems
|
|
*/
|
|
if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
|
|
xfs_warn(mp,
|
|
"cannot mount a read-only filesystem as read-write");
|
|
return -EROFS;
|
|
}
|
|
|
|
if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
|
|
(mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
|
|
!xfs_sb_version_has_pquotino(&mp->m_sb)) {
|
|
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;
|
|
|
|
return 0;
|
|
|
|
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);
|
|
}
|
|
|
|
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_FORCED_SHUTDOWN(mp) ||
|
|
percpu_counter_sum(&mp->m_delalloc_blks) == 0);
|
|
percpu_counter_destroy(&mp->m_delalloc_blks);
|
|
}
|
|
|
|
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");
|
|
xfs_filestream_unmount(mp);
|
|
xfs_unmountfs(mp);
|
|
|
|
xfs_freesb(mp);
|
|
free_percpu(mp->m_stats.xs_stats);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 *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:
|
|
mp->m_logbufs = result.uint_32;
|
|
return 0;
|
|
case Opt_logbsize:
|
|
if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize))
|
|
return -EINVAL;
|
|
return 0;
|
|
case Opt_logdev:
|
|
kfree(mp->m_logname);
|
|
mp->m_logname = kstrdup(param->string, GFP_KERNEL);
|
|
if (!mp->m_logname)
|
|
return -ENOMEM;
|
|
return 0;
|
|
case Opt_rtdev:
|
|
kfree(mp->m_rtname);
|
|
mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
|
|
if (!mp->m_rtname)
|
|
return -ENOMEM;
|
|
return 0;
|
|
case Opt_allocsize:
|
|
if (suffix_kstrtoint(param->string, 10, &size))
|
|
return -EINVAL;
|
|
mp->m_allocsize_log = ffs(size) - 1;
|
|
mp->m_flags |= XFS_MOUNT_ALLOCSIZE;
|
|
return 0;
|
|
case Opt_grpid:
|
|
case Opt_bsdgroups:
|
|
mp->m_flags |= XFS_MOUNT_GRPID;
|
|
return 0;
|
|
case Opt_nogrpid:
|
|
case Opt_sysvgroups:
|
|
mp->m_flags &= ~XFS_MOUNT_GRPID;
|
|
return 0;
|
|
case Opt_wsync:
|
|
mp->m_flags |= XFS_MOUNT_WSYNC;
|
|
return 0;
|
|
case Opt_norecovery:
|
|
mp->m_flags |= XFS_MOUNT_NORECOVERY;
|
|
return 0;
|
|
case Opt_noalign:
|
|
mp->m_flags |= XFS_MOUNT_NOALIGN;
|
|
return 0;
|
|
case Opt_swalloc:
|
|
mp->m_flags |= XFS_MOUNT_SWALLOC;
|
|
return 0;
|
|
case Opt_sunit:
|
|
mp->m_dalign = result.uint_32;
|
|
return 0;
|
|
case Opt_swidth:
|
|
mp->m_swidth = result.uint_32;
|
|
return 0;
|
|
case Opt_inode32:
|
|
mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
|
|
return 0;
|
|
case Opt_inode64:
|
|
mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
|
|
return 0;
|
|
case Opt_nouuid:
|
|
mp->m_flags |= XFS_MOUNT_NOUUID;
|
|
return 0;
|
|
case Opt_largeio:
|
|
mp->m_flags |= XFS_MOUNT_LARGEIO;
|
|
return 0;
|
|
case Opt_nolargeio:
|
|
mp->m_flags &= ~XFS_MOUNT_LARGEIO;
|
|
return 0;
|
|
case Opt_filestreams:
|
|
mp->m_flags |= XFS_MOUNT_FILESTREAMS;
|
|
return 0;
|
|
case Opt_noquota:
|
|
mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
|
|
mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
|
|
mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
|
|
return 0;
|
|
case Opt_quota:
|
|
case Opt_uquota:
|
|
case Opt_usrquota:
|
|
mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
|
|
XFS_UQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_qnoenforce:
|
|
case Opt_uqnoenforce:
|
|
mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
|
|
mp->m_qflags &= ~XFS_UQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_pquota:
|
|
case Opt_prjquota:
|
|
mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
|
|
XFS_PQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_pqnoenforce:
|
|
mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
|
|
mp->m_qflags &= ~XFS_PQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_gquota:
|
|
case Opt_grpquota:
|
|
mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
|
|
XFS_GQUOTA_ENFD);
|
|
return 0;
|
|
case Opt_gqnoenforce:
|
|
mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
|
|
mp->m_qflags &= ~XFS_GQUOTA_ENFD;
|
|
return 0;
|
|
case Opt_discard:
|
|
mp->m_flags |= XFS_MOUNT_DISCARD;
|
|
return 0;
|
|
case Opt_nodiscard:
|
|
mp->m_flags &= ~XFS_MOUNT_DISCARD;
|
|
return 0;
|
|
#ifdef CONFIG_FS_DAX
|
|
case Opt_dax:
|
|
xfs_mount_set_dax_mode(mp, XFS_DAX_ALWAYS);
|
|
return 0;
|
|
case Opt_dax_enum:
|
|
xfs_mount_set_dax_mode(mp, result.uint_32);
|
|
return 0;
|
|
#endif
|
|
/* Following mount options will be removed in September 2025 */
|
|
case Opt_ikeep:
|
|
xfs_warn(mp, "%s mount option is deprecated.", param->key);
|
|
mp->m_flags |= XFS_MOUNT_IKEEP;
|
|
return 0;
|
|
case Opt_noikeep:
|
|
xfs_warn(mp, "%s mount option is deprecated.", param->key);
|
|
mp->m_flags &= ~XFS_MOUNT_IKEEP;
|
|
return 0;
|
|
case Opt_attr2:
|
|
xfs_warn(mp, "%s mount option is deprecated.", param->key);
|
|
mp->m_flags |= XFS_MOUNT_ATTR2;
|
|
return 0;
|
|
case Opt_noattr2:
|
|
xfs_warn(mp, "%s mount option is deprecated.", param->key);
|
|
mp->m_flags &= ~XFS_MOUNT_ATTR2;
|
|
mp->m_flags |= XFS_MOUNT_NOATTR2;
|
|
return 0;
|
|
default:
|
|
xfs_warn(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 ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
|
|
!(mp->m_flags & XFS_MOUNT_RDONLY)) {
|
|
xfs_warn(mp, "no-recovery mounts must be read-only.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
|
|
(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 ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) &&
|
|
(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;
|
|
|
|
/* 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_counters;
|
|
}
|
|
|
|
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_sb_version_hascrc(&mp->m_sb)) {
|
|
#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_sb_version_needsrepair(&mp->m_sb)) {
|
|
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_sb_version_hasbigtime(&mp->m_sb)) {
|
|
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_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
|
|
sb->s_flags |= SB_I_VERSION;
|
|
|
|
if (xfs_sb_version_hasbigtime(&mp->m_sb))
|
|
xfs_warn(mp,
|
|
"EXPERIMENTAL big timestamp feature in use. Use at your own risk!");
|
|
|
|
if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) {
|
|
bool rtdev_is_dax = false, datadev_is_dax;
|
|
|
|
xfs_warn(mp,
|
|
"DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
|
|
|
|
datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev,
|
|
sb->s_blocksize);
|
|
if (mp->m_rtdev_targp)
|
|
rtdev_is_dax = bdev_dax_supported(
|
|
mp->m_rtdev_targp->bt_bdev, sb->s_blocksize);
|
|
if (!rtdev_is_dax && !datadev_is_dax) {
|
|
xfs_alert(mp,
|
|
"DAX unsupported by block device. Turning off DAX.");
|
|
xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
|
|
}
|
|
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
|
|
xfs_alert(mp,
|
|
"DAX and reflink cannot be used together!");
|
|
error = -EINVAL;
|
|
goto out_filestream_unmount;
|
|
}
|
|
}
|
|
|
|
if (mp->m_flags & XFS_MOUNT_DISCARD) {
|
|
struct request_queue *q = bdev_get_queue(sb->s_bdev);
|
|
|
|
if (!blk_queue_discard(q)) {
|
|
xfs_warn(mp, "mounting with \"discard\" option, but "
|
|
"the device does not support discard");
|
|
mp->m_flags &= ~XFS_MOUNT_DISCARD;
|
|
}
|
|
}
|
|
|
|
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
|
|
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_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
|
|
xfs_alert(mp,
|
|
"reverse mapping btree not compatible with realtime device!");
|
|
error = -EINVAL;
|
|
goto out_filestream_unmount;
|
|
}
|
|
|
|
if (xfs_sb_version_hasinobtcounts(&mp->m_sb))
|
|
xfs_warn(mp,
|
|
"EXPERIMENTAL inode btree counters 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_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 (mp->m_flags & XFS_MOUNT_NORECOVERY) {
|
|
xfs_warn(mp,
|
|
"ro->rw transition prohibited on norecovery mount");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
|
|
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;
|
|
}
|
|
|
|
mp->m_flags &= ~XFS_MOUNT_RDONLY;
|
|
|
|
/*
|
|
* If this is the first remount to writeable state we might have some
|
|
* superblock changes to update.
|
|
*/
|
|
if (mp->m_update_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);
|
|
|
|
/* Recover any CoW blocks that never got remapped. */
|
|
error = xfs_reflink_recover_cow(mp);
|
|
if (error) {
|
|
xfs_err(mp,
|
|
"Error %d recovering leftover CoW allocations.", error);
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
return error;
|
|
}
|
|
xfs_blockgc_start(mp);
|
|
|
|
/* Create the per-AG metadata reservation pool .*/
|
|
error = xfs_fs_reserve_ag_blocks(mp);
|
|
if (error && error != -ENOSPC)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_remount_ro(
|
|
struct xfs_mount *mp)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Cancel background eofb scanning so it cannot race with the final
|
|
* log force+buftarg wait and deadlock the remount.
|
|
*/
|
|
xfs_blockgc_stop(mp);
|
|
|
|
/* Get rid of any leftover CoW reservations... */
|
|
error = xfs_blockgc_free_space(mp, NULL);
|
|
if (error) {
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
return error;
|
|
}
|
|
|
|
/* 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);
|
|
mp->m_flags |= XFS_MOUNT_RDONLY;
|
|
|
|
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;
|
|
xfs_sb_t *sbp = &mp->m_sb;
|
|
int flags = fc->sb_flags;
|
|
int error;
|
|
|
|
/* version 5 superblocks always support version counters. */
|
|
if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
|
|
fc->sb_flags |= SB_I_VERSION;
|
|
|
|
error = xfs_fs_validate_params(new_mp);
|
|
if (error)
|
|
return error;
|
|
|
|
sync_filesystem(mp->m_super);
|
|
|
|
/* inode32 -> inode64 */
|
|
if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
|
|
!(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
|
|
mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
|
|
mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
|
|
}
|
|
|
|
/* inode64 -> inode32 */
|
|
if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
|
|
(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
|
|
mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
|
|
mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
|
|
}
|
|
|
|
/* ro -> rw */
|
|
if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) {
|
|
error = xfs_remount_rw(mp);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* rw -> ro */
|
|
if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (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);
|
|
spin_lock_init(&mp->m_agirotor_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)
|
|
mp->m_flags |= XFS_MOUNT_RDONLY;
|
|
if (fc->sb_flags & SB_DIRSYNC)
|
|
mp->m_flags |= XFS_MOUNT_DIRSYNC;
|
|
if (fc->sb_flags & SB_SYNCHRONOUS)
|
|
mp->m_flags |= XFS_MOUNT_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_zones(void)
|
|
{
|
|
xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket",
|
|
sizeof(struct xlog_ticket),
|
|
0, 0, NULL);
|
|
if (!xfs_log_ticket_zone)
|
|
goto out;
|
|
|
|
xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item",
|
|
sizeof(struct xfs_extent_free_item),
|
|
0, 0, NULL);
|
|
if (!xfs_bmap_free_item_zone)
|
|
goto out_destroy_log_ticket_zone;
|
|
|
|
xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur",
|
|
sizeof(struct xfs_btree_cur),
|
|
0, 0, NULL);
|
|
if (!xfs_btree_cur_zone)
|
|
goto out_destroy_bmap_free_item_zone;
|
|
|
|
xfs_da_state_zone = kmem_cache_create("xfs_da_state",
|
|
sizeof(struct xfs_da_state),
|
|
0, 0, NULL);
|
|
if (!xfs_da_state_zone)
|
|
goto out_destroy_btree_cur_zone;
|
|
|
|
xfs_ifork_zone = kmem_cache_create("xfs_ifork",
|
|
sizeof(struct xfs_ifork),
|
|
0, 0, NULL);
|
|
if (!xfs_ifork_zone)
|
|
goto out_destroy_da_state_zone;
|
|
|
|
xfs_trans_zone = kmem_cache_create("xf_trans",
|
|
sizeof(struct xfs_trans),
|
|
0, 0, NULL);
|
|
if (!xfs_trans_zone)
|
|
goto out_destroy_ifork_zone;
|
|
|
|
|
|
/*
|
|
* The size of the zone allocated buf log item is the maximum
|
|
* size possible under XFS. This wastes a little bit of memory,
|
|
* but it is much faster.
|
|
*/
|
|
xfs_buf_item_zone = kmem_cache_create("xfs_buf_item",
|
|
sizeof(struct xfs_buf_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_buf_item_zone)
|
|
goto out_destroy_trans_zone;
|
|
|
|
xfs_efd_zone = kmem_cache_create("xfs_efd_item",
|
|
(sizeof(struct xfs_efd_log_item) +
|
|
(XFS_EFD_MAX_FAST_EXTENTS - 1) *
|
|
sizeof(struct xfs_extent)),
|
|
0, 0, NULL);
|
|
if (!xfs_efd_zone)
|
|
goto out_destroy_buf_item_zone;
|
|
|
|
xfs_efi_zone = kmem_cache_create("xfs_efi_item",
|
|
(sizeof(struct xfs_efi_log_item) +
|
|
(XFS_EFI_MAX_FAST_EXTENTS - 1) *
|
|
sizeof(struct xfs_extent)),
|
|
0, 0, NULL);
|
|
if (!xfs_efi_zone)
|
|
goto out_destroy_efd_zone;
|
|
|
|
xfs_inode_zone = 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_zone)
|
|
goto out_destroy_efi_zone;
|
|
|
|
xfs_ili_zone = kmem_cache_create("xfs_ili",
|
|
sizeof(struct xfs_inode_log_item), 0,
|
|
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
|
|
NULL);
|
|
if (!xfs_ili_zone)
|
|
goto out_destroy_inode_zone;
|
|
|
|
xfs_icreate_zone = kmem_cache_create("xfs_icr",
|
|
sizeof(struct xfs_icreate_item),
|
|
0, 0, NULL);
|
|
if (!xfs_icreate_zone)
|
|
goto out_destroy_ili_zone;
|
|
|
|
xfs_rud_zone = kmem_cache_create("xfs_rud_item",
|
|
sizeof(struct xfs_rud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_rud_zone)
|
|
goto out_destroy_icreate_zone;
|
|
|
|
xfs_rui_zone = kmem_cache_create("xfs_rui_item",
|
|
xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_rui_zone)
|
|
goto out_destroy_rud_zone;
|
|
|
|
xfs_cud_zone = kmem_cache_create("xfs_cud_item",
|
|
sizeof(struct xfs_cud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_cud_zone)
|
|
goto out_destroy_rui_zone;
|
|
|
|
xfs_cui_zone = kmem_cache_create("xfs_cui_item",
|
|
xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_cui_zone)
|
|
goto out_destroy_cud_zone;
|
|
|
|
xfs_bud_zone = kmem_cache_create("xfs_bud_item",
|
|
sizeof(struct xfs_bud_log_item),
|
|
0, 0, NULL);
|
|
if (!xfs_bud_zone)
|
|
goto out_destroy_cui_zone;
|
|
|
|
xfs_bui_zone = kmem_cache_create("xfs_bui_item",
|
|
xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
|
|
0, 0, NULL);
|
|
if (!xfs_bui_zone)
|
|
goto out_destroy_bud_zone;
|
|
|
|
return 0;
|
|
|
|
out_destroy_bud_zone:
|
|
kmem_cache_destroy(xfs_bud_zone);
|
|
out_destroy_cui_zone:
|
|
kmem_cache_destroy(xfs_cui_zone);
|
|
out_destroy_cud_zone:
|
|
kmem_cache_destroy(xfs_cud_zone);
|
|
out_destroy_rui_zone:
|
|
kmem_cache_destroy(xfs_rui_zone);
|
|
out_destroy_rud_zone:
|
|
kmem_cache_destroy(xfs_rud_zone);
|
|
out_destroy_icreate_zone:
|
|
kmem_cache_destroy(xfs_icreate_zone);
|
|
out_destroy_ili_zone:
|
|
kmem_cache_destroy(xfs_ili_zone);
|
|
out_destroy_inode_zone:
|
|
kmem_cache_destroy(xfs_inode_zone);
|
|
out_destroy_efi_zone:
|
|
kmem_cache_destroy(xfs_efi_zone);
|
|
out_destroy_efd_zone:
|
|
kmem_cache_destroy(xfs_efd_zone);
|
|
out_destroy_buf_item_zone:
|
|
kmem_cache_destroy(xfs_buf_item_zone);
|
|
out_destroy_trans_zone:
|
|
kmem_cache_destroy(xfs_trans_zone);
|
|
out_destroy_ifork_zone:
|
|
kmem_cache_destroy(xfs_ifork_zone);
|
|
out_destroy_da_state_zone:
|
|
kmem_cache_destroy(xfs_da_state_zone);
|
|
out_destroy_btree_cur_zone:
|
|
kmem_cache_destroy(xfs_btree_cur_zone);
|
|
out_destroy_bmap_free_item_zone:
|
|
kmem_cache_destroy(xfs_bmap_free_item_zone);
|
|
out_destroy_log_ticket_zone:
|
|
kmem_cache_destroy(xfs_log_ticket_zone);
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_destroy_zones(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free are flushed before we
|
|
* destroy caches.
|
|
*/
|
|
rcu_barrier();
|
|
kmem_cache_destroy(xfs_bui_zone);
|
|
kmem_cache_destroy(xfs_bud_zone);
|
|
kmem_cache_destroy(xfs_cui_zone);
|
|
kmem_cache_destroy(xfs_cud_zone);
|
|
kmem_cache_destroy(xfs_rui_zone);
|
|
kmem_cache_destroy(xfs_rud_zone);
|
|
kmem_cache_destroy(xfs_icreate_zone);
|
|
kmem_cache_destroy(xfs_ili_zone);
|
|
kmem_cache_destroy(xfs_inode_zone);
|
|
kmem_cache_destroy(xfs_efi_zone);
|
|
kmem_cache_destroy(xfs_efd_zone);
|
|
kmem_cache_destroy(xfs_buf_item_zone);
|
|
kmem_cache_destroy(xfs_trans_zone);
|
|
kmem_cache_destroy(xfs_ifork_zone);
|
|
kmem_cache_destroy(xfs_da_state_zone);
|
|
kmem_cache_destroy(xfs_btree_cur_zone);
|
|
kmem_cache_destroy(xfs_bmap_free_item_zone);
|
|
kmem_cache_destroy(xfs_log_ticket_zone);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
STATIC int __init
|
|
init_xfs_fs(void)
|
|
{
|
|
int error;
|
|
|
|
xfs_check_ondisk_structs();
|
|
|
|
printk(KERN_INFO XFS_VERSION_STRING " with "
|
|
XFS_BUILD_OPTIONS " enabled\n");
|
|
|
|
xfs_dir_startup();
|
|
|
|
error = xfs_init_zones();
|
|
if (error)
|
|
goto out;
|
|
|
|
error = xfs_init_workqueues();
|
|
if (error)
|
|
goto out_destroy_zones;
|
|
|
|
error = xfs_mru_cache_init();
|
|
if (error)
|
|
goto out_destroy_wq;
|
|
|
|
error = xfs_buf_init();
|
|
if (error)
|
|
goto out_mru_cache_uninit;
|
|
|
|
error = xfs_init_procfs();
|
|
if (error)
|
|
goto out_buf_terminate;
|
|
|
|
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_buf_terminate:
|
|
xfs_buf_terminate();
|
|
out_mru_cache_uninit:
|
|
xfs_mru_cache_uninit();
|
|
out_destroy_wq:
|
|
xfs_destroy_workqueues();
|
|
out_destroy_zones:
|
|
xfs_destroy_zones();
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
STATIC void __exit
|
|
exit_xfs_fs(void)
|
|
{
|
|
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_buf_terminate();
|
|
xfs_mru_cache_uninit();
|
|
xfs_destroy_workqueues();
|
|
xfs_destroy_zones();
|
|
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");
|