mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 03:26:50 +07:00
3ae5080f4c
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (37 commits) fs: avoid I_NEW inodes Merge code for single and multiple-instance mounts Remove get_init_pts_sb() Move common mknod_ptmx() calls into caller Parse mount options just once and copy them to super block Unroll essentials of do_remount_sb() into devpts vfs: simple_set_mnt() should return void fs: move bdev code out of buffer.c constify dentry_operations: rest constify dentry_operations: configfs constify dentry_operations: sysfs constify dentry_operations: JFS constify dentry_operations: OCFS2 constify dentry_operations: GFS2 constify dentry_operations: FAT constify dentry_operations: FUSE constify dentry_operations: procfs constify dentry_operations: ecryptfs constify dentry_operations: CIFS constify dentry_operations: AFS ...
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/crc32.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "dir.h"
|
|
#include "glock.h"
|
|
#include "super.h"
|
|
#include "util.h"
|
|
#include "inode.h"
|
|
|
|
/**
|
|
* gfs2_drevalidate - Check directory lookup consistency
|
|
* @dentry: the mapping to check
|
|
* @nd:
|
|
*
|
|
* Check to make sure the lookup necessary to arrive at this inode from its
|
|
* parent is still good.
|
|
*
|
|
* Returns: 1 if the dentry is ok, 0 if it isn't
|
|
*/
|
|
|
|
static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
|
|
{
|
|
struct dentry *parent = dget_parent(dentry);
|
|
struct gfs2_sbd *sdp = GFS2_SB(parent->d_inode);
|
|
struct gfs2_inode *dip = GFS2_I(parent->d_inode);
|
|
struct inode *inode = dentry->d_inode;
|
|
struct gfs2_holder d_gh;
|
|
struct gfs2_inode *ip = NULL;
|
|
int error;
|
|
int had_lock = 0;
|
|
|
|
if (inode) {
|
|
if (is_bad_inode(inode))
|
|
goto invalid;
|
|
ip = GFS2_I(inode);
|
|
}
|
|
|
|
if (sdp->sd_args.ar_localcaching)
|
|
goto valid;
|
|
|
|
had_lock = (gfs2_glock_is_locked_by_me(dip->i_gl) != NULL);
|
|
if (!had_lock) {
|
|
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
error = gfs2_dir_check(parent->d_inode, &dentry->d_name, ip);
|
|
switch (error) {
|
|
case 0:
|
|
if (!inode)
|
|
goto invalid_gunlock;
|
|
break;
|
|
case -ENOENT:
|
|
if (!inode)
|
|
goto valid_gunlock;
|
|
goto invalid_gunlock;
|
|
default:
|
|
goto fail_gunlock;
|
|
}
|
|
|
|
valid_gunlock:
|
|
if (!had_lock)
|
|
gfs2_glock_dq_uninit(&d_gh);
|
|
valid:
|
|
dput(parent);
|
|
return 1;
|
|
|
|
invalid_gunlock:
|
|
if (!had_lock)
|
|
gfs2_glock_dq_uninit(&d_gh);
|
|
invalid:
|
|
if (inode && S_ISDIR(inode->i_mode)) {
|
|
if (have_submounts(dentry))
|
|
goto valid;
|
|
shrink_dcache_parent(dentry);
|
|
}
|
|
d_drop(dentry);
|
|
dput(parent);
|
|
return 0;
|
|
|
|
fail_gunlock:
|
|
gfs2_glock_dq_uninit(&d_gh);
|
|
fail:
|
|
dput(parent);
|
|
return 0;
|
|
}
|
|
|
|
static int gfs2_dhash(struct dentry *dentry, struct qstr *str)
|
|
{
|
|
str->hash = gfs2_disk_hash(str->name, str->len);
|
|
return 0;
|
|
}
|
|
|
|
const struct dentry_operations gfs2_dops = {
|
|
.d_revalidate = gfs2_drevalidate,
|
|
.d_hash = gfs2_dhash,
|
|
};
|
|
|