diff options
Diffstat (limited to 'rtemsbsd/rtems/rtems-bsd-mountroot.c')
| -rw-r--r-- | rtemsbsd/rtems/rtems-bsd-mountroot.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/rtemsbsd/rtems/rtems-bsd-mountroot.c b/rtemsbsd/rtems/rtems-bsd-mountroot.c new file mode 100644 index 00000000..132a08ff --- /dev/null +++ b/rtemsbsd/rtems/rtems-bsd-mountroot.c @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup FileSystems + * + * @brief Mount a root file system. + */ + +/* + * Copyright (C) 2020 Chris Johns <chris@contemporary.software> + * + * 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. + * + * 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 <machine/rtems-bsd-kernel-space.h> + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/filedesc.h> +#include <sys/kernel.h> +#include <sys/mount.h> +#include <sys/resourcevar.h> +#include <sys/vnode.h> + +#include <vm/vm_extern.h> + +struct vnode *rootvnode; + +MALLOC_DECLARE(M_MOUNT); + +static void +set_rootvnode(struct mount *mp) +{ + struct proc *p; + int error; + + error = VFS_ROOT(mp, LK_EXCLUSIVE, &rootvnode); + if (error != 0) + panic("Cannot find root vnode"); + + VOP_UNLOCK(rootvnode, 0); + + p = curthread->td_proc; + FILEDESC_XLOCK(p->p_fd); + + if (p->p_fd->fd_cdir != NULL) + vrele(p->p_fd->fd_cdir); + p->p_fd->fd_cdir = rootvnode; + VREF(rootvnode); + + if (p->p_fd->fd_rdir != NULL) + vrele(p->p_fd->fd_rdir); + p->p_fd->fd_rdir = rootvnode; + VREF(rootvnode); + + FILEDESC_XUNLOCK(p->p_fd); +} + +static void +bsd_mountroot(const char *fstype) +{ + struct vfsoptlist *opts; + struct vfsconf *vfsp; + struct mount *mp; + struct ucred *cred; + int error; + + cred = crget(); + cred->cr_uidinfo = uifind(0); + cred->cr_ruidinfo = uifind(0); + + vfsp = vfs_byname(fstype); + if (vfsp != NULL) { + mp = vfs_mount_alloc(NULLVP, vfsp, "/", cred); + + crfree(cred); + + error = VFS_MOUNT(mp); + if (error != 0) + panic("Cannot mount root file system: %d", error); + + error = VFS_STATFS(mp, &mp->mnt_stat); + if (error != 0) + panic("Cannot stat root file system: %d", error); + + opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK); + TAILQ_INIT(opts); + mp->mnt_opt = opts; + + mtx_lock(&mountlist_mtx); + TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list); + mtx_unlock(&mountlist_mtx); + + set_rootvnode(mp); + } +} + +static void +bsd_rootfs_init(const void *dummy) +{ + bsd_mountroot("rootfs"); +} +SYSINIT(bsdroot, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, bsd_rootfs_init, NULL); |