From ac93c35a842936a4f722b85ea3b4d3ff872123f9 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 18 Sep 2025 18:25:34 -0400 Subject: kern: vfs: Add vnode allocation / release routines Introduce routines to allocate (create) and deallocate (destroy) virtual file nodes. Signed-off-by: Ian Moffett --- src/sys/os/vfs_subr.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 src/sys/os/vfs_subr.c (limited to 'src/sys/os/vfs_subr.c') diff --git a/src/sys/os/vfs_subr.c b/src/sys/os/vfs_subr.c new file mode 100644 index 0000000..d950b53 --- /dev/null +++ b/src/sys/os/vfs_subr.c @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * 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 the project 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 +#include +#include +#include +#include + +/* + * Allocate a new vnode + */ +int +vfs_valloc(struct vnode **resp, vtype_t type, int flags) +{ + struct vnode *vp; + + if (resp == NULL) { + return -EINVAL; + } + + /* Attempt to allocate a vnode */ + vp = kalloc(sizeof(*vp)); + if (vp == NULL) { + return -ENOMEM; + } + + memset(vp, 0, sizeof(*vp)); + vp->type = type; + *resp = vp; + return 0; +} + +int +vfs_vrel(struct vnode *vp, int flags) +{ + if (vp == NULL) { + return -EINVAL; + } + + kfree(vp); + return 0; +} -- cgit v1.2.3