![Linus Torvalds](/assets/img/avatar_default.png)
* A rework of the filesytem-dax implementation provides for detection of
unmap operations (truncate / hole punch) colliding with in-progress
device-DMA. A fix for these collisions remains a work-in-progress
pending resolution of truncate latency and starvation regressions.
* The of_pmem driver expands the users of libnvdimm outside of x86 and
ACPI to describe an implementation of persistent memory on PowerPC with
Open Firmware / Device tree.
* Address Range Scrub (ARS) handling is completely rewritten to account for
the fact that ARS may run for 100s of seconds and there is no platform
defined way to cancel it. ARS will now no longer block namespace
initialization.
* The NVDIMM Namespace Label implementation is updated to handle label
areas as small as 1K, down from 128K.
* Miscellaneous cleanups and updates to unit test infrastructure.
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Merge tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"This cycle was was not something I ever want to repeat as there were
several late changes that have only now just settled.
Half of the branch up to commit d2c997c0f1
("fs, dax: use
page->mapping to warn...") have been in -next for several releases.
The of_pmem driver and the address range scrub rework were late
arrivals, and the dax work was scaled back at the last moment.
The of_pmem driver missed a previous merge window due to an oversight.
A sense of obligation to rectify that miss is why it is included for
4.17. It has acks from PowerPC folks. Stephen reported a build failure
that only occurs when merging it with your latest tree, for now I have
fixed that up by disabling modular builds of of_pmem. A test merge
with your tree has received a build success report from the 0day robot
over 156 configs.
An initial version of the ARS rework was submitted before the merge
window. It is self contained to libnvdimm, a net code reduction, and
passing all unit tests.
The filesystem-dax changes are based on the wait_var_event()
functionality from tip/sched/core. However, late review feedback
showed that those changes regressed truncate performance to a large
degree. The branch was rewound to drop the truncate behavior change
and now only includes preparation patches and cleanups (with full acks
and reviews). The finalization of this dax-dma-vs-trnucate work will
need to wait for 4.18.
Summary:
- A rework of the filesytem-dax implementation provides for detection
of unmap operations (truncate / hole punch) colliding with
in-progress device-DMA. A fix for these collisions remains a
work-in-progress pending resolution of truncate latency and
starvation regressions.
- The of_pmem driver expands the users of libnvdimm outside of x86
and ACPI to describe an implementation of persistent memory on
PowerPC with Open Firmware / Device tree.
- Address Range Scrub (ARS) handling is completely rewritten to
account for the fact that ARS may run for 100s of seconds and there
is no platform defined way to cancel it. ARS will now no longer
block namespace initialization.
- The NVDIMM Namespace Label implementation is updated to handle
label areas as small as 1K, down from 128K.
- Miscellaneous cleanups and updates to unit test infrastructure"
* tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
libnvdimm, of_pmem: workaround OF_NUMA=n build error
nfit, address-range-scrub: add module option to skip initial ars
nfit, address-range-scrub: rework and simplify ARS state machine
nfit, address-range-scrub: determine one platform max_ars value
powerpc/powernv: Create platform devs for nvdimm buses
doc/devicetree: Persistent memory region bindings
libnvdimm: Add device-tree based driver
libnvdimm: Add of_node to region and bus descriptors
libnvdimm, region: quiet region probe
libnvdimm, namespace: use a safe lookup for dimm device name
libnvdimm, dimm: fix dpa reservation vs uninitialized label area
libnvdimm, testing: update the default smart ctrl_temperature
libnvdimm, testing: Add emulation for smart injection commands
nfit, address-range-scrub: introduce nfit_spa->ars_state
libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
nfit, address-range-scrub: fix scrub in-progress reporting
dax, dm: allow device-mapper to operate without dax support
dax: introduce CONFIG_DAX_DRIVER
fs, dax: use page->mapping to warn if truncate collides with a busy page
ext2, dax: introduce ext2_dax_aops
...
1312 lines
32 KiB
C
1312 lines
32 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
|
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#include "xfs_fs.h"
|
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#include "xfs_shared.h"
|
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#include "xfs_format.h"
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#include "xfs_log_format.h"
|
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#include "xfs_trans_resv.h"
|
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#include "xfs_mount.h"
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#include "xfs_da_format.h"
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#include "xfs_inode.h"
|
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_acl.h"
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#include "xfs_quota.h"
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#include "xfs_error.h"
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#include "xfs_attr.h"
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#include "xfs_trans.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_symlink.h"
|
|
#include "xfs_da_btree.h"
|
|
#include "xfs_dir2.h"
|
|
#include "xfs_trans_space.h"
|
|
#include "xfs_pnfs.h"
|
|
#include "xfs_iomap.h"
|
|
|
|
#include <linux/capability.h>
|
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#include <linux/xattr.h>
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#include <linux/posix_acl.h>
|
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#include <linux/security.h>
|
|
#include <linux/iomap.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/iversion.h>
|
|
|
|
/*
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|
* Directories have different lock order w.r.t. mmap_sem compared to regular
|
|
* files. This is due to readdir potentially triggering page faults on a user
|
|
* buffer inside filldir(), and this happens with the ilock on the directory
|
|
* held. For regular files, the lock order is the other way around - the
|
|
* mmap_sem is taken during the page fault, and then we lock the ilock to do
|
|
* block mapping. Hence we need a different class for the directory ilock so
|
|
* that lockdep can tell them apart.
|
|
*/
|
|
static struct lock_class_key xfs_nondir_ilock_class;
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static struct lock_class_key xfs_dir_ilock_class;
|
|
|
|
static int
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|
xfs_initxattrs(
|
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struct inode *inode,
|
|
const struct xattr *xattr_array,
|
|
void *fs_info)
|
|
{
|
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const struct xattr *xattr;
|
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struct xfs_inode *ip = XFS_I(inode);
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int error = 0;
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|
|
|
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
|
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error = xfs_attr_set(ip, xattr->name, xattr->value,
|
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xattr->value_len, ATTR_SECURE);
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if (error < 0)
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break;
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|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Hook in SELinux. This is not quite correct yet, what we really need
|
|
* here (as we do for default ACLs) is a mechanism by which creation of
|
|
* these attrs can be journalled at inode creation time (along with the
|
|
* inode, of course, such that log replay can't cause these to be lost).
|
|
*/
|
|
|
|
STATIC int
|
|
xfs_init_security(
|
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struct inode *inode,
|
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struct inode *dir,
|
|
const struct qstr *qstr)
|
|
{
|
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return security_inode_init_security(inode, dir, qstr,
|
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&xfs_initxattrs, NULL);
|
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}
|
|
|
|
static void
|
|
xfs_dentry_to_name(
|
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struct xfs_name *namep,
|
|
struct dentry *dentry)
|
|
{
|
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namep->name = dentry->d_name.name;
|
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namep->len = dentry->d_name.len;
|
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namep->type = XFS_DIR3_FT_UNKNOWN;
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}
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|
|
|
static int
|
|
xfs_dentry_mode_to_name(
|
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struct xfs_name *namep,
|
|
struct dentry *dentry,
|
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int mode)
|
|
{
|
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namep->name = dentry->d_name.name;
|
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namep->len = dentry->d_name.len;
|
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namep->type = xfs_mode_to_ftype(mode);
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|
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if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
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return -EFSCORRUPTED;
|
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|
|
return 0;
|
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}
|
|
|
|
STATIC void
|
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xfs_cleanup_inode(
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struct inode *dir,
|
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struct inode *inode,
|
|
struct dentry *dentry)
|
|
{
|
|
struct xfs_name teardown;
|
|
|
|
/* Oh, the horror.
|
|
* If we can't add the ACL or we fail in
|
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* xfs_init_security we must back out.
|
|
* ENOSPC can hit here, among other things.
|
|
*/
|
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xfs_dentry_to_name(&teardown, dentry);
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xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
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}
|
|
|
|
STATIC int
|
|
xfs_generic_create(
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struct inode *dir,
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struct dentry *dentry,
|
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umode_t mode,
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|
dev_t rdev,
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bool tmpfile) /* unnamed file */
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{
|
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struct inode *inode;
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struct xfs_inode *ip = NULL;
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struct posix_acl *default_acl, *acl;
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struct xfs_name name;
|
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int error;
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|
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/*
|
|
* Irix uses Missed'em'V split, but doesn't want to see
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* the upper 5 bits of (14bit) major.
|
|
*/
|
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if (S_ISCHR(mode) || S_ISBLK(mode)) {
|
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if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
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return -EINVAL;
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} else {
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rdev = 0;
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}
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error = posix_acl_create(dir, &mode, &default_acl, &acl);
|
|
if (error)
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return error;
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|
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/* Verify mode is valid also for tmpfile case */
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error = xfs_dentry_mode_to_name(&name, dentry, mode);
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if (unlikely(error))
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goto out_free_acl;
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if (!tmpfile) {
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error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
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} else {
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error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
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}
|
|
if (unlikely(error))
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goto out_free_acl;
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|
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inode = VFS_I(ip);
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error = xfs_init_security(inode, dir, &dentry->d_name);
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|
if (unlikely(error))
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goto out_cleanup_inode;
|
|
|
|
#ifdef CONFIG_XFS_POSIX_ACL
|
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if (default_acl) {
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error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
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|
if (error)
|
|
goto out_cleanup_inode;
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|
}
|
|
if (acl) {
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|
error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
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|
if (error)
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|
goto out_cleanup_inode;
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|
}
|
|
#endif
|
|
|
|
xfs_setup_iops(ip);
|
|
|
|
if (tmpfile)
|
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d_tmpfile(dentry, inode);
|
|
else
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|
d_instantiate(dentry, inode);
|
|
|
|
xfs_finish_inode_setup(ip);
|
|
|
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out_free_acl:
|
|
if (default_acl)
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posix_acl_release(default_acl);
|
|
if (acl)
|
|
posix_acl_release(acl);
|
|
return error;
|
|
|
|
out_cleanup_inode:
|
|
xfs_finish_inode_setup(ip);
|
|
if (!tmpfile)
|
|
xfs_cleanup_inode(dir, inode, dentry);
|
|
iput(inode);
|
|
goto out_free_acl;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_mknod(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode,
|
|
dev_t rdev)
|
|
{
|
|
return xfs_generic_create(dir, dentry, mode, rdev, false);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_create(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode,
|
|
bool flags)
|
|
{
|
|
return xfs_vn_mknod(dir, dentry, mode, 0);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_mkdir(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode)
|
|
{
|
|
return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
|
|
}
|
|
|
|
STATIC struct dentry *
|
|
xfs_vn_lookup(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
struct xfs_inode *cip;
|
|
struct xfs_name name;
|
|
int error;
|
|
|
|
if (dentry->d_name.len >= MAXNAMELEN)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
xfs_dentry_to_name(&name, dentry);
|
|
error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
|
|
if (unlikely(error)) {
|
|
if (unlikely(error != -ENOENT))
|
|
return ERR_PTR(error);
|
|
d_add(dentry, NULL);
|
|
return NULL;
|
|
}
|
|
|
|
return d_splice_alias(VFS_I(cip), dentry);
|
|
}
|
|
|
|
STATIC struct dentry *
|
|
xfs_vn_ci_lookup(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
struct xfs_inode *ip;
|
|
struct xfs_name xname;
|
|
struct xfs_name ci_name;
|
|
struct qstr dname;
|
|
int error;
|
|
|
|
if (dentry->d_name.len >= MAXNAMELEN)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
xfs_dentry_to_name(&xname, dentry);
|
|
error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
|
|
if (unlikely(error)) {
|
|
if (unlikely(error != -ENOENT))
|
|
return ERR_PTR(error);
|
|
/*
|
|
* call d_add(dentry, NULL) here when d_drop_negative_children
|
|
* is called in xfs_vn_mknod (ie. allow negative dentries
|
|
* with CI filesystems).
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
/* if exact match, just splice and exit */
|
|
if (!ci_name.name)
|
|
return d_splice_alias(VFS_I(ip), dentry);
|
|
|
|
/* else case-insensitive match... */
|
|
dname.name = ci_name.name;
|
|
dname.len = ci_name.len;
|
|
dentry = d_add_ci(dentry, VFS_I(ip), &dname);
|
|
kmem_free(ci_name.name);
|
|
return dentry;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_link(
|
|
struct dentry *old_dentry,
|
|
struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct inode *inode = d_inode(old_dentry);
|
|
struct xfs_name name;
|
|
int error;
|
|
|
|
error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
|
|
if (unlikely(error))
|
|
return error;
|
|
|
|
error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
|
|
if (unlikely(error))
|
|
return error;
|
|
|
|
ihold(inode);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_unlink(
|
|
struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct xfs_name name;
|
|
int error;
|
|
|
|
xfs_dentry_to_name(&name, dentry);
|
|
|
|
error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* With unlink, the VFS makes the dentry "negative": no inode,
|
|
* but still hashed. This is incompatible with case-insensitive
|
|
* mode, so invalidate (unhash) the dentry in CI-mode.
|
|
*/
|
|
if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
|
|
d_invalidate(dentry);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_symlink(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
struct inode *inode;
|
|
struct xfs_inode *cip = NULL;
|
|
struct xfs_name name;
|
|
int error;
|
|
umode_t mode;
|
|
|
|
mode = S_IFLNK |
|
|
(irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
|
|
error = xfs_dentry_mode_to_name(&name, dentry, mode);
|
|
if (unlikely(error))
|
|
goto out;
|
|
|
|
error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
|
|
if (unlikely(error))
|
|
goto out;
|
|
|
|
inode = VFS_I(cip);
|
|
|
|
error = xfs_init_security(inode, dir, &dentry->d_name);
|
|
if (unlikely(error))
|
|
goto out_cleanup_inode;
|
|
|
|
xfs_setup_iops(cip);
|
|
|
|
d_instantiate(dentry, inode);
|
|
xfs_finish_inode_setup(cip);
|
|
return 0;
|
|
|
|
out_cleanup_inode:
|
|
xfs_finish_inode_setup(cip);
|
|
xfs_cleanup_inode(dir, inode, dentry);
|
|
iput(inode);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_rename(
|
|
struct inode *odir,
|
|
struct dentry *odentry,
|
|
struct inode *ndir,
|
|
struct dentry *ndentry,
|
|
unsigned int flags)
|
|
{
|
|
struct inode *new_inode = d_inode(ndentry);
|
|
int omode = 0;
|
|
int error;
|
|
struct xfs_name oname;
|
|
struct xfs_name nname;
|
|
|
|
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
|
|
return -EINVAL;
|
|
|
|
/* if we are exchanging files, we need to set i_mode of both files */
|
|
if (flags & RENAME_EXCHANGE)
|
|
omode = d_inode(ndentry)->i_mode;
|
|
|
|
error = xfs_dentry_mode_to_name(&oname, odentry, omode);
|
|
if (omode && unlikely(error))
|
|
return error;
|
|
|
|
error = xfs_dentry_mode_to_name(&nname, ndentry,
|
|
d_inode(odentry)->i_mode);
|
|
if (unlikely(error))
|
|
return error;
|
|
|
|
return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
|
|
XFS_I(ndir), &nname,
|
|
new_inode ? XFS_I(new_inode) : NULL, flags);
|
|
}
|
|
|
|
/*
|
|
* careful here - this function can get called recursively, so
|
|
* we need to be very careful about how much stack we use.
|
|
* uio is kmalloced for this reason...
|
|
*/
|
|
STATIC const char *
|
|
xfs_vn_get_link(
|
|
struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
char *link;
|
|
int error = -ENOMEM;
|
|
|
|
if (!dentry)
|
|
return ERR_PTR(-ECHILD);
|
|
|
|
link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
|
|
if (!link)
|
|
goto out_err;
|
|
|
|
error = xfs_readlink(XFS_I(d_inode(dentry)), link);
|
|
if (unlikely(error))
|
|
goto out_kfree;
|
|
|
|
set_delayed_call(done, kfree_link, link);
|
|
return link;
|
|
|
|
out_kfree:
|
|
kfree(link);
|
|
out_err:
|
|
return ERR_PTR(error);
|
|
}
|
|
|
|
STATIC const char *
|
|
xfs_vn_get_link_inline(
|
|
struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE);
|
|
return XFS_I(inode)->i_df.if_u1.if_data;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_getattr(
|
|
const struct path *path,
|
|
struct kstat *stat,
|
|
u32 request_mask,
|
|
unsigned int query_flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
trace_xfs_getattr(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
stat->size = XFS_ISIZE(ip);
|
|
stat->dev = inode->i_sb->s_dev;
|
|
stat->mode = inode->i_mode;
|
|
stat->nlink = inode->i_nlink;
|
|
stat->uid = inode->i_uid;
|
|
stat->gid = inode->i_gid;
|
|
stat->ino = ip->i_ino;
|
|
stat->atime = inode->i_atime;
|
|
stat->mtime = inode->i_mtime;
|
|
stat->ctime = inode->i_ctime;
|
|
stat->blocks =
|
|
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
|
|
|
|
if (ip->i_d.di_version == 3) {
|
|
if (request_mask & STATX_BTIME) {
|
|
stat->result_mask |= STATX_BTIME;
|
|
stat->btime.tv_sec = ip->i_d.di_crtime.t_sec;
|
|
stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec;
|
|
}
|
|
}
|
|
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
|
|
stat->attributes |= STATX_ATTR_IMMUTABLE;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
|
|
stat->attributes |= STATX_ATTR_APPEND;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
|
|
stat->attributes |= STATX_ATTR_NODUMP;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
stat->blksize = BLKDEV_IOSIZE;
|
|
stat->rdev = inode->i_rdev;
|
|
break;
|
|
default:
|
|
if (XFS_IS_REALTIME_INODE(ip)) {
|
|
/*
|
|
* If the file blocks are being allocated from a
|
|
* realtime volume, then return the inode's realtime
|
|
* extent size or the realtime volume's extent size.
|
|
*/
|
|
stat->blksize =
|
|
xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
|
|
} else
|
|
stat->blksize = xfs_preferred_iosize(mp);
|
|
stat->rdev = 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
xfs_setattr_mode(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
umode_t mode = iattr->ia_mode;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
inode->i_mode &= S_IFMT;
|
|
inode->i_mode |= mode & ~S_IFMT;
|
|
}
|
|
|
|
void
|
|
xfs_setattr_time(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
if (iattr->ia_valid & ATTR_ATIME)
|
|
inode->i_atime = iattr->ia_atime;
|
|
if (iattr->ia_valid & ATTR_CTIME)
|
|
inode->i_ctime = iattr->ia_ctime;
|
|
if (iattr->ia_valid & ATTR_MTIME)
|
|
inode->i_mtime = iattr->ia_mtime;
|
|
}
|
|
|
|
static int
|
|
xfs_vn_change_ok(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
return setattr_prepare(dentry, iattr);
|
|
}
|
|
|
|
/*
|
|
* Set non-size attributes of an inode.
|
|
*
|
|
* Caution: The caller of this function is responsible for calling
|
|
* setattr_prepare() or otherwise verifying the change is fine.
|
|
*/
|
|
int
|
|
xfs_setattr_nonsize(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr,
|
|
int flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
int mask = iattr->ia_valid;
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
|
|
kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
|
|
struct xfs_dquot *udqp = NULL, *gdqp = NULL;
|
|
struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
|
|
|
|
ASSERT((mask & ATTR_SIZE) == 0);
|
|
|
|
/*
|
|
* If disk quotas is on, we make sure that the dquots do exist on disk,
|
|
* before we start any other transactions. Trying to do this later
|
|
* is messy. We don't care to take a readlock to look at the ids
|
|
* in inode here, because we can't hold it across the trans_reserve.
|
|
* If the IDs do change before we take the ilock, we're covered
|
|
* because the i_*dquot fields will get updated anyway.
|
|
*/
|
|
if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
|
|
uint qflags = 0;
|
|
|
|
if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
|
|
uid = iattr->ia_uid;
|
|
qflags |= XFS_QMOPT_UQUOTA;
|
|
} else {
|
|
uid = inode->i_uid;
|
|
}
|
|
if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
|
|
gid = iattr->ia_gid;
|
|
qflags |= XFS_QMOPT_GQUOTA;
|
|
} else {
|
|
gid = inode->i_gid;
|
|
}
|
|
|
|
/*
|
|
* We take a reference when we initialize udqp and gdqp,
|
|
* so it is important that we never blindly double trip on
|
|
* the same variable. See xfs_create() for an example.
|
|
*/
|
|
ASSERT(udqp == NULL);
|
|
ASSERT(gdqp == NULL);
|
|
error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
|
|
xfs_kgid_to_gid(gid),
|
|
xfs_get_projid(ip),
|
|
qflags, &udqp, &gdqp, NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
|
|
if (error)
|
|
goto out_dqrele;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
*/
|
|
if (mask & (ATTR_UID|ATTR_GID)) {
|
|
/*
|
|
* These IDs could have changed since we last looked at them.
|
|
* But, we're assured that if the ownership did change
|
|
* while we didn't have the inode locked, inode's dquot(s)
|
|
* would have changed also.
|
|
*/
|
|
iuid = inode->i_uid;
|
|
igid = inode->i_gid;
|
|
gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
|
|
uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
|
|
|
|
/*
|
|
* Do a quota reservation only if uid/gid is actually
|
|
* going to change.
|
|
*/
|
|
if (XFS_IS_QUOTA_RUNNING(mp) &&
|
|
((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
|
|
(XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
|
|
ASSERT(tp);
|
|
error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
|
|
NULL, capable(CAP_FOWNER) ?
|
|
XFS_QMOPT_FORCE_RES : 0);
|
|
if (error) /* out of quota */
|
|
goto out_cancel;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
*/
|
|
if (mask & (ATTR_UID|ATTR_GID)) {
|
|
/*
|
|
* CAP_FSETID overrides the following restrictions:
|
|
*
|
|
* The set-user-ID and set-group-ID bits of a file will be
|
|
* cleared upon successful return from chown()
|
|
*/
|
|
if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
|
|
!capable(CAP_FSETID))
|
|
inode->i_mode &= ~(S_ISUID|S_ISGID);
|
|
|
|
/*
|
|
* Change the ownerships and register quota modifications
|
|
* in the transaction.
|
|
*/
|
|
if (!uid_eq(iuid, uid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
|
|
ASSERT(mask & ATTR_UID);
|
|
ASSERT(udqp);
|
|
olddquot1 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_udquot, udqp);
|
|
}
|
|
ip->i_d.di_uid = xfs_kuid_to_uid(uid);
|
|
inode->i_uid = uid;
|
|
}
|
|
if (!gid_eq(igid, gid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
|
|
ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
|
|
!XFS_IS_PQUOTA_ON(mp));
|
|
ASSERT(mask & ATTR_GID);
|
|
ASSERT(gdqp);
|
|
olddquot2 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_gdquot, gdqp);
|
|
}
|
|
ip->i_d.di_gid = xfs_kgid_to_gid(gid);
|
|
inode->i_gid = gid;
|
|
}
|
|
}
|
|
|
|
if (mask & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(mp, xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
error = xfs_trans_commit(tp);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Release any dquot(s) the inode had kept before chown.
|
|
*/
|
|
xfs_qm_dqrele(olddquot1);
|
|
xfs_qm_dqrele(olddquot2);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* XXX(hch): Updating the ACL entries is not atomic vs the i_mode
|
|
* update. We could avoid this with linked transactions
|
|
* and passing down the transaction pointer all the way
|
|
* to attr_set. No previous user of the generic
|
|
* Posix ACL code seems to care about this issue either.
|
|
*/
|
|
if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
|
|
error = posix_acl_chmod(inode, inode->i_mode);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_cancel:
|
|
xfs_trans_cancel(tp);
|
|
out_dqrele:
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_vn_setattr_nonsize(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(d_inode(dentry));
|
|
int error;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
error = xfs_vn_change_ok(dentry, iattr);
|
|
if (error)
|
|
return error;
|
|
return xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
/*
|
|
* Truncate file. Must have write permission and not be a directory.
|
|
*
|
|
* Caution: The caller of this function is responsible for calling
|
|
* setattr_prepare() or otherwise verifying the change is fine.
|
|
*/
|
|
STATIC int
|
|
xfs_setattr_size(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
xfs_off_t oldsize, newsize;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
uint lock_flags = 0;
|
|
bool did_zeroing = false;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
|
|
ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
|
|
ASSERT(S_ISREG(inode->i_mode));
|
|
ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
|
|
ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
|
|
|
|
oldsize = inode->i_size;
|
|
newsize = iattr->ia_size;
|
|
|
|
/*
|
|
* Short circuit the truncate case for zero length files.
|
|
*/
|
|
if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
|
|
if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
|
|
return 0;
|
|
|
|
/*
|
|
* Use the regular setattr path to update the timestamps.
|
|
*/
|
|
iattr->ia_valid &= ~ATTR_SIZE;
|
|
return xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the dquots are attached to the inode.
|
|
*/
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Wait for all direct I/O to complete.
|
|
*/
|
|
inode_dio_wait(inode);
|
|
|
|
/*
|
|
* File data changes must be complete before we start the transaction to
|
|
* modify the inode. This needs to be done before joining the inode to
|
|
* the transaction because the inode cannot be unlocked once it is a
|
|
* part of the transaction.
|
|
*
|
|
* Start with zeroing any data beyond EOF that we may expose on file
|
|
* extension, or zeroing out the rest of the block on a downward
|
|
* truncate.
|
|
*/
|
|
if (newsize > oldsize) {
|
|
trace_xfs_zero_eof(ip, oldsize, newsize - oldsize);
|
|
error = iomap_zero_range(inode, oldsize, newsize - oldsize,
|
|
&did_zeroing, &xfs_iomap_ops);
|
|
} else {
|
|
error = iomap_truncate_page(inode, newsize, &did_zeroing,
|
|
&xfs_iomap_ops);
|
|
}
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* We've already locked out new page faults, so now we can safely remove
|
|
* pages from the page cache knowing they won't get refaulted until we
|
|
* drop the XFS_MMAP_EXCL lock after the extent manipulations are
|
|
* complete. The truncate_setsize() call also cleans partial EOF page
|
|
* PTEs on extending truncates and hence ensures sub-page block size
|
|
* filesystems are correctly handled, too.
|
|
*
|
|
* We have to do all the page cache truncate work outside the
|
|
* transaction context as the "lock" order is page lock->log space
|
|
* reservation as defined by extent allocation in the writeback path.
|
|
* Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
|
|
* having already truncated the in-memory version of the file (i.e. made
|
|
* user visible changes). There's not much we can do about this, except
|
|
* to hope that the caller sees ENOMEM and retries the truncate
|
|
* operation.
|
|
*
|
|
* And we update in-core i_size and truncate page cache beyond newsize
|
|
* before writeback the [di_size, newsize] range, so we're guaranteed
|
|
* not to write stale data past the new EOF on truncate down.
|
|
*/
|
|
truncate_setsize(inode, newsize);
|
|
|
|
/*
|
|
* We are going to log the inode size change in this transaction so
|
|
* any previous writes that are beyond the on disk EOF and the new
|
|
* EOF that have not been written out need to be written here. If we
|
|
* do not write the data out, we expose ourselves to the null files
|
|
* problem. Note that this includes any block zeroing we did above;
|
|
* otherwise those blocks may not be zeroed after a crash.
|
|
*/
|
|
if (did_zeroing ||
|
|
(newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
|
|
error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
|
|
ip->i_d.di_size, newsize - 1);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
|
|
lock_flags |= XFS_ILOCK_EXCL;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Only change the c/mtime if we are changing the size or we are
|
|
* explicitly asked to change it. This handles the semantic difference
|
|
* between truncate() and ftruncate() as implemented in the VFS.
|
|
*
|
|
* The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
|
|
* special case where we need to update the times despite not having
|
|
* these flags set. For all other operations the VFS set these flags
|
|
* explicitly if it wants a timestamp update.
|
|
*/
|
|
if (newsize != oldsize &&
|
|
!(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
|
|
iattr->ia_ctime = iattr->ia_mtime =
|
|
current_time(inode);
|
|
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
|
|
}
|
|
|
|
/*
|
|
* The first thing we do is set the size to new_size permanently on
|
|
* disk. This way we don't have to worry about anyone ever being able
|
|
* to look at the data being freed even in the face of a crash.
|
|
* What we're getting around here is the case where we free a block, it
|
|
* is allocated to another file, it is written to, and then we crash.
|
|
* If the new data gets written to the file but the log buffers
|
|
* containing the free and reallocation don't, then we'd end up with
|
|
* garbage in the blocks being freed. As long as we make the new size
|
|
* permanent before actually freeing any blocks it doesn't matter if
|
|
* they get written to.
|
|
*/
|
|
ip->i_d.di_size = newsize;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
if (newsize <= oldsize) {
|
|
error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
|
|
/*
|
|
* Truncated "down", so we're removing references to old data
|
|
* here - if we delay flushing for a long time, we expose
|
|
* ourselves unduly to the notorious NULL files problem. So,
|
|
* we mark this inode and flush it when the file is closed,
|
|
* and do not wait the usual (long) time for writeout.
|
|
*/
|
|
xfs_iflags_set(ip, XFS_ITRUNCATED);
|
|
|
|
/* A truncate down always removes post-EOF blocks. */
|
|
xfs_inode_clear_eofblocks_tag(ip);
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(mp, xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
error = xfs_trans_commit(tp);
|
|
out_unlock:
|
|
if (lock_flags)
|
|
xfs_iunlock(ip, lock_flags);
|
|
return error;
|
|
|
|
out_trans_cancel:
|
|
xfs_trans_cancel(tp);
|
|
goto out_unlock;
|
|
}
|
|
|
|
int
|
|
xfs_vn_setattr_size(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(d_inode(dentry));
|
|
int error;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
error = xfs_vn_change_ok(dentry, iattr);
|
|
if (error)
|
|
return error;
|
|
return xfs_setattr_size(ip, iattr);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_setattr(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
int error;
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE) {
|
|
struct xfs_inode *ip = XFS_I(d_inode(dentry));
|
|
uint iolock = XFS_IOLOCK_EXCL;
|
|
|
|
error = xfs_break_layouts(d_inode(dentry), &iolock);
|
|
if (error)
|
|
return error;
|
|
|
|
xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
|
|
error = xfs_vn_setattr_size(dentry, iattr);
|
|
xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
|
|
} else {
|
|
error = xfs_vn_setattr_nonsize(dentry, iattr);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_update_time(
|
|
struct inode *inode,
|
|
struct timespec *now,
|
|
int flags)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
int log_flags = XFS_ILOG_TIMESTAMP;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
|
|
trace_xfs_update_time(ip);
|
|
|
|
if (inode->i_sb->s_flags & SB_LAZYTIME) {
|
|
if (!((flags & S_VERSION) &&
|
|
inode_maybe_inc_iversion(inode, false)))
|
|
return generic_update_time(inode, now, flags);
|
|
|
|
/* Capture the iversion update that just occurred */
|
|
log_flags |= XFS_ILOG_CORE;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
if (flags & S_CTIME)
|
|
inode->i_ctime = *now;
|
|
if (flags & S_MTIME)
|
|
inode->i_mtime = *now;
|
|
if (flags & S_ATIME)
|
|
inode->i_atime = *now;
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, log_flags);
|
|
return xfs_trans_commit(tp);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_fiemap(
|
|
struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo,
|
|
u64 start,
|
|
u64 length)
|
|
{
|
|
int error;
|
|
|
|
xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
|
|
if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
|
|
fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
|
|
error = iomap_fiemap(inode, fieinfo, start, length,
|
|
&xfs_xattr_iomap_ops);
|
|
} else {
|
|
error = iomap_fiemap(inode, fieinfo, start, length,
|
|
&xfs_iomap_ops);
|
|
}
|
|
xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_tmpfile(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode)
|
|
{
|
|
return xfs_generic_create(dir, dentry, mode, 0, true);
|
|
}
|
|
|
|
static const struct inode_operations xfs_inode_operations = {
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.fiemap = xfs_vn_fiemap,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_ci_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_ci_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_symlink_inode_operations = {
|
|
.get_link = xfs_vn_get_link,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
static const struct inode_operations xfs_inline_symlink_inode_operations = {
|
|
.get_link = xfs_vn_get_link_inline,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
STATIC void
|
|
xfs_diflags_to_iflags(
|
|
struct inode *inode,
|
|
struct xfs_inode *ip)
|
|
{
|
|
uint16_t flags = ip->i_d.di_flags;
|
|
|
|
inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
|
|
S_NOATIME | S_DAX);
|
|
|
|
if (flags & XFS_DIFLAG_IMMUTABLE)
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
if (flags & XFS_DIFLAG_APPEND)
|
|
inode->i_flags |= S_APPEND;
|
|
if (flags & XFS_DIFLAG_SYNC)
|
|
inode->i_flags |= S_SYNC;
|
|
if (flags & XFS_DIFLAG_NOATIME)
|
|
inode->i_flags |= S_NOATIME;
|
|
if (S_ISREG(inode->i_mode) &&
|
|
ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE &&
|
|
!xfs_is_reflink_inode(ip) &&
|
|
(ip->i_mount->m_flags & XFS_MOUNT_DAX ||
|
|
ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
|
|
inode->i_flags |= S_DAX;
|
|
}
|
|
|
|
/*
|
|
* Initialize the Linux inode.
|
|
*
|
|
* When reading existing inodes from disk this is called directly from xfs_iget,
|
|
* when creating a new inode it is called from xfs_ialloc after setting up the
|
|
* inode. These callers have different criteria for clearing XFS_INEW, so leave
|
|
* it up to the caller to deal with unlocking the inode appropriately.
|
|
*/
|
|
void
|
|
xfs_setup_inode(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_vnode;
|
|
gfp_t gfp_mask;
|
|
|
|
inode->i_ino = ip->i_ino;
|
|
inode->i_state = I_NEW;
|
|
|
|
inode_sb_list_add(inode);
|
|
/* make the inode look hashed for the writeback code */
|
|
hlist_add_fake(&inode->i_hash);
|
|
|
|
inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
|
|
inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
|
|
|
|
i_size_write(inode, ip->i_d.di_size);
|
|
xfs_diflags_to_iflags(inode, ip);
|
|
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
|
|
ip->d_ops = ip->i_mount->m_dir_inode_ops;
|
|
} else {
|
|
ip->d_ops = ip->i_mount->m_nondir_inode_ops;
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
|
|
}
|
|
|
|
/*
|
|
* Ensure all page cache allocations are done from GFP_NOFS context to
|
|
* prevent direct reclaim recursion back into the filesystem and blowing
|
|
* stacks or deadlocking.
|
|
*/
|
|
gfp_mask = mapping_gfp_mask(inode->i_mapping);
|
|
mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
|
|
|
|
/*
|
|
* If there is no attribute fork no ACL can exist on this inode,
|
|
* and it can't have any file capabilities attached to it either.
|
|
*/
|
|
if (!XFS_IFORK_Q(ip)) {
|
|
inode_has_no_xattr(inode);
|
|
cache_no_acl(inode);
|
|
}
|
|
}
|
|
|
|
void
|
|
xfs_setup_iops(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_vnode;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_op = &xfs_inode_operations;
|
|
inode->i_fop = &xfs_file_operations;
|
|
if (IS_DAX(inode))
|
|
inode->i_mapping->a_ops = &xfs_dax_aops;
|
|
else
|
|
inode->i_mapping->a_ops = &xfs_address_space_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
|
|
inode->i_op = &xfs_dir_ci_inode_operations;
|
|
else
|
|
inode->i_op = &xfs_dir_inode_operations;
|
|
inode->i_fop = &xfs_dir_file_operations;
|
|
break;
|
|
case S_IFLNK:
|
|
if (ip->i_df.if_flags & XFS_IFINLINE)
|
|
inode->i_op = &xfs_inline_symlink_inode_operations;
|
|
else
|
|
inode->i_op = &xfs_symlink_inode_operations;
|
|
break;
|
|
default:
|
|
inode->i_op = &xfs_inode_operations;
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
break;
|
|
}
|
|
}
|