Release 4.10 fs/gfs2/dentry.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/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
#include <linux/namei.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
* @flags: lookup flags
*
* 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, unsigned int flags)
{
struct dentry *parent;
struct gfs2_sbd *sdp;
struct gfs2_inode *dip;
struct inode *inode;
struct gfs2_holder d_gh;
struct gfs2_inode *ip = NULL;
int error;
int had_lock = 0;
if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
sdp = GFS2_SB(d_inode(parent));
dip = GFS2_I(d_inode(parent));
inode = d_inode(dentry);
if (inode) {
if (is_bad_inode(inode))
goto invalid;
ip = GFS2_I(inode);
}
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
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(d_inode(parent), &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:
dput(parent);
return 0;
fail_gunlock:
gfs2_glock_dq_uninit(&d_gh);
fail:
dput(parent);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david teigland | david teigland | 175 | 58.92% | 1 | 11.11% |
| steven whitehouse | steven whitehouse | 41 | 13.80% | 4 | 44.44% |
| nick piggin | nick piggin | 35 | 11.78% | 1 | 11.11% |
| wendy cheng | wendy cheng | 31 | 10.44% | 1 | 11.11% |
| david howells | david howells | 12 | 4.04% | 1 | 11.11% |
| al viro | al viro | 3 | 1.01% | 1 | 11.11% |
| Total | 297 | 100.00% | 9 | 100.00% |
static int gfs2_dhash(const struct dentry *dentry, struct qstr *str)
{
str->hash = gfs2_disk_hash(str->name, str->len);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 34 | 97.14% | 1 | 50.00% |
| nick piggin | nick piggin | 1 | 2.86% | 1 | 50.00% |
| Total | 35 | 100.00% | 2 | 100.00% |
static int gfs2_dentry_delete(const struct dentry *dentry)
{
struct gfs2_inode *ginode;
if (d_really_is_negative(dentry))
return 0;
ginode = GFS2_I(d_inode(dentry));
if (!gfs2_holder_initialized(&ginode->i_iopen_gh))
return 0;
if (test_bit(GLF_DEMOTE, &ginode->i_iopen_gh.gh_gl->gl_flags))
return 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| wengang wang | wengang wang | 62 | 84.93% | 1 | 25.00% |
| david howells | david howells | 6 | 8.22% | 1 | 25.00% |
| andreas gruenbacher | andreas gruenbacher | 4 | 5.48% | 1 | 25.00% |
| nick piggin | nick piggin | 1 | 1.37% | 1 | 25.00% |
| Total | 73 | 100.00% | 4 | 100.00% |
const struct dentry_operations gfs2_dops = {
.d_revalidate = gfs2_drevalidate,
.d_hash = gfs2_dhash,
.d_delete = gfs2_dentry_delete,
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david teigland | david teigland | 203 | 43.38% | 1 | 5.26% |
| steven whitehouse | steven whitehouse | 99 | 21.15% | 8 | 42.11% |
| wengang wang | wengang wang | 67 | 14.32% | 1 | 5.26% |
| nick piggin | nick piggin | 40 | 8.55% | 3 | 15.79% |
| wendy cheng | wendy cheng | 31 | 6.62% | 1 | 5.26% |
| david howells | david howells | 18 | 3.85% | 1 | 5.26% |
| al viro | al viro | 5 | 1.07% | 2 | 10.53% |
| andreas gruenbacher | andreas gruenbacher | 4 | 0.85% | 1 | 5.26% |
| fabio massimo di nitto | fabio massimo di nitto | 1 | 0.21% | 1 | 5.26% |
| Total | 468 | 100.00% | 19 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.