From c2056f5a365c85780dd2d2835547723f6f60c192 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 19 Jun 2024 22:18:16 -0400 Subject: kernel: Add initramfs and initial VFS code Signed-off-by: Ian Moffett --- sys/include/fs/initramfs.h | 37 ++++++++++++++++++++ sys/include/sys/mount.h | 84 ++++++++++++++++++++++++++++++++++++++++++++++ sys/include/sys/namei.h | 44 ++++++++++++++++++++++++ sys/include/sys/vnode.h | 74 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 239 insertions(+) create mode 100644 sys/include/fs/initramfs.h create mode 100644 sys/include/sys/mount.h create mode 100644 sys/include/sys/namei.h create mode 100644 sys/include/sys/vnode.h (limited to 'sys/include') diff --git a/sys/include/fs/initramfs.h b/sys/include/fs/initramfs.h new file mode 100644 index 0000000..897079c --- /dev/null +++ b/sys/include/fs/initramfs.h @@ -0,0 +1,37 @@ +/* + * 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. + */ + +#ifndef _INITRAMFS_H_ +#define _INITRAMFS_H_ + +#include + +extern const struct vops g_initramfs_vops; + +#endif /* _INITRAMFS_H_ */ diff --git a/sys/include/sys/mount.h b/sys/include/sys/mount.h new file mode 100644 index 0000000..e46cda9 --- /dev/null +++ b/sys/include/sys/mount.h @@ -0,0 +1,84 @@ +/* + * 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. + */ + +#ifndef _SYS_MOUNT_H_ +#define _SYS_MOUNT_H_ + +#include +#include +#include +#include +#include + +#if defined(_KERNEL) + +#define FS_NAME_MAX 16 /* Length of fs name including nul */ + +/* + * Filesystem types. + */ +#define MOUNT_RAMFS "initramfs" + +struct vfsops; +struct mount; + +/* Mount list */ +typedef TAILQ_HEAD(, mount) mountlist_t; +extern mountlist_t g_mountlist; + +/* Filesystem operations */ +extern const struct vfsops g_initramfs_vfsops; + +struct mount { + struct spinlock lock; + struct vnode *vp; + const struct vfsops *mnt_ops; + void *data; + TAILQ_ENTRY(mount) mnt_list; +}; + +struct fs_info { + char name[FS_NAME_MAX]; /* FS Type name */ + const struct vfsops *vfsops; /* Operations vector */ + int flags; /* Flags for this filesystem */ + int refcount; /* Mount count of this type */ +}; + +struct vfsops { + int(*init)(struct fs_info *fip); + int(*mount)(struct mount *mp, const char *path, void *data, + struct nameidata *ndp); +}; + +void vfs_init(void); +struct mount *vfs_alloc_mount(struct vnode *vp, struct fs_info *fip); +struct fs_info *vfs_byname(const char *name); + +#endif /* _KERNEL */ +#endif /* _SYS_MOUNT_H_ */ diff --git a/sys/include/sys/namei.h b/sys/include/sys/namei.h new file mode 100644 index 0000000..bd3c0db --- /dev/null +++ b/sys/include/sys/namei.h @@ -0,0 +1,44 @@ +/* + * 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. + */ + +#ifndef _SYS_NAMEI_H_ +#define _SYS_NAMEI_H_ + +#include +#include + +struct nameidata { + const char *path; /* Pathname */ + uint32_t flags; + struct vnode *vp; /* Vnode result */ +}; + +int namei(struct nameidata *ndp); + +#endif /* !_SYS_NAMEI_H_ */ diff --git a/sys/include/sys/vnode.h b/sys/include/sys/vnode.h new file mode 100644 index 0000000..1caf2cb --- /dev/null +++ b/sys/include/sys/vnode.h @@ -0,0 +1,74 @@ +/* + * 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. + */ + +#ifndef _SYS_VNODE_H_ +#define _SYS_VNODE_H_ + +#include + +#if defined(_KERNEL) + +struct vops; + +struct vnode { + int type; + int flags; + void *data; + const struct vops *vops; +}; + +/* Vnode type flags */ +#define VNON 0x00 /* Uninitialized */ +#define VREG 0x01 /* Regular file */ +#define VDIR 0x02 /* Directory */ +#define VCHR 0x03 /* Character device */ +#define VBLK 0x04 /* Block device */ + +struct vop_lookup_args { + const char *name; /* Current path component */ + struct vnode *dirvp; /* Directory vnode */ + struct vnode **vpp; /* Result vnode */ +}; + +struct vops { + int(*lookup)(struct vop_lookup_args *args); + int(*read)(struct vnode *vp, struct sio_txn *sio); + int(*reclaim)(struct vnode *vp); +}; + +extern struct vnode *g_root_vnode; + +int vfs_alloc_vnode(struct vnode **res, int type); +int vfs_release_vnode(struct vnode *vp); + +int vfs_vop_lookup(struct vnode *vp, struct vop_lookup_args *args); +int vfs_vop_read(struct vnode *vp, struct sio_txn *sio); + +#endif /* _KERNEL */ +#endif /* !_SYS_VNODE_H_ */ -- cgit v1.2.3