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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/errno.h>
#include <vm/dynalloc.h>
#include <string.h>
/*
* Convert a path to a vnode.
*
* @ndp: Nameidata containing the path and resulting
* vnode.
*
* TODO: Add support for lookups with individual
* path components
*/
int
namei(struct nameidata *ndp)
{
struct vnode *vp;
struct vop_lookup_args lookup_args;
const char *path = ndp->path;
int status;
if (path == NULL) {
return -EINVAL;
}
/* Path must start with "/" */
if (*path != '/') {
return -EINVAL;
}
/* Just return the root vnode if we can */
if (strcmp(path, "/") == 0) {
ndp->vp = g_root_vnode;
return 0;
}
/*
* Some filesystems (like initramfs) may only understand
* full paths, so try passing it through.
*/
lookup_args.name = path;
lookup_args.dirvp = g_root_vnode;
lookup_args.vpp = &vp;
status = vfs_vop_lookup(lookup_args.dirvp, &lookup_args);
if (status != 0) {
return status;
}
ndp->vp = vp;
return 0;
}
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