fbcb7599e4
This patch removes the v9fs_fid_lookup_remove which is no longer used. Based on original patch from Adrian Bunk <bunk@stusta.de> which used #if 0 to isolate the code. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
|
|
* V9FS FID Management
|
|
*
|
|
* Copyright (C) 2005, 2006 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to:
|
|
* Free Software Foundation
|
|
* 51 Franklin Street, Fifth Floor
|
|
* Boston, MA 02111-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/idr.h>
|
|
#include <asm/semaphore.h>
|
|
#include <net/9p/9p.h>
|
|
#include <net/9p/client.h>
|
|
|
|
#include "v9fs.h"
|
|
#include "v9fs_vfs.h"
|
|
#include "fid.h"
|
|
|
|
/**
|
|
* v9fs_fid_insert - add a fid to a dentry
|
|
* @fid: fid to add
|
|
* @dentry: dentry that it is being added to
|
|
*
|
|
*/
|
|
|
|
int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
|
|
{
|
|
struct v9fs_dentry *dent;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n",
|
|
fid->fid, dentry->d_iname);
|
|
|
|
dent = dentry->d_fsdata;
|
|
if (!dent) {
|
|
dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
|
|
if (!dent)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&dent->lock);
|
|
INIT_LIST_HEAD(&dent->fidlist);
|
|
dentry->d_fsdata = dent;
|
|
}
|
|
|
|
spin_lock(&dent->lock);
|
|
list_add(&fid->dlist, &dent->fidlist);
|
|
spin_unlock(&dent->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* v9fs_fid_lookup - return a locked fid from a dentry
|
|
* @dentry: dentry to look for fid in
|
|
*
|
|
* find a fid in the dentry, obtain its semaphore and return a reference to it.
|
|
* code calling lookup is responsible for releasing lock
|
|
*
|
|
* TODO: only match fids that have the same uid as current user
|
|
*
|
|
*/
|
|
|
|
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
|
|
{
|
|
struct v9fs_dentry *dent;
|
|
struct p9_fid *fid;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
|
|
dent = dentry->d_fsdata;
|
|
if (dent)
|
|
fid = list_entry(dent->fidlist.next, struct p9_fid, dlist);
|
|
else
|
|
fid = ERR_PTR(-EBADF);
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid);
|
|
return fid;
|
|
}
|
|
|
|
/**
|
|
* v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
|
|
* release it
|
|
* @dentry: dentry to look for fid in
|
|
*
|
|
* find a fid in the dentry and then clone to a new private fid
|
|
*
|
|
* TODO: only match fids that have the same uid as current user
|
|
*
|
|
*/
|
|
|
|
struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
|
|
{
|
|
struct p9_fid *ofid, *fid;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
|
|
ofid = v9fs_fid_lookup(dentry);
|
|
if (IS_ERR(ofid))
|
|
return ofid;
|
|
|
|
fid = p9_client_walk(ofid, 0, NULL, 1);
|
|
return fid;
|
|
}
|