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-rw-r--r--sys/kern/init_main.c4
-rw-r--r--sys/kern/vfs_init.c70
-rw-r--r--sys/kern/vfs_lookup.c83
-rw-r--r--sys/kern/vfs_subr.c122
4 files changed, 279 insertions, 0 deletions
diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 6018dfe..09b8d2d 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -30,6 +30,7 @@
#include <sys/reboot.h>
#include <sys/syslog.h>
#include <sys/sched.h>
+#include <sys/mount.h>
#include <dev/cons/cons.h>
#include <dev/acpi/acpi.h>
#include <machine/cpu.h>
@@ -52,6 +53,9 @@ main(void)
/* Startup the BSP */
cpu_startup(&g_bsp_ci);
+ /* Init the virtual file system */
+ vfs_init();
+
/* Start scheduler and bootstrap APs */
sched_init();
mp_bootstrap_aps(&g_bsp_ci);
diff --git a/sys/kern/vfs_init.c b/sys/kern/vfs_init.c
new file mode 100644
index 0000000..aafbc00
--- /dev/null
+++ b/sys/kern/vfs_init.c
@@ -0,0 +1,70 @@
+/*
+ * 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/param.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/panic.h>
+#include <string.h>
+
+struct vnode *g_root_vnode = NULL;
+static struct fs_info fs_list[] = {
+ {MOUNT_RAMFS, &g_initramfs_vfsops, 0, 0},
+};
+
+void
+vfs_init(void)
+{
+ struct fs_info *fs;
+ const struct vfsops *vfsops;
+
+ TAILQ_INIT(&g_mountlist);
+
+ for (size_t i= 0; i < NELEM(fs_list); ++i) {
+ fs = &fs_list[i];
+ vfsops = fs->vfsops;
+
+ /* Try to initialize the filesystem */
+ if (vfsops->init != NULL) {
+ vfsops->init(fs);
+ }
+ }
+}
+
+struct fs_info *
+vfs_byname(const char *name)
+{
+ for (int i = 0; i < NELEM(fs_list); ++i) {
+ if (strcmp(fs_list[i].name, name) == 0) {
+ return &fs_list[i];
+ }
+ }
+
+ return NULL;
+}
diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c
new file mode 100644
index 0000000..83924c6
--- /dev/null
+++ b/sys/kern/vfs_lookup.c
@@ -0,0 +1,83 @@
+/*
+ * 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;
+}
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
new file mode 100644
index 0000000..04d64e3
--- /dev/null
+++ b/sys/kern/vfs_subr.c
@@ -0,0 +1,122 @@
+/*
+ * 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/vnode.h>
+#include <sys/errno.h>
+#include <sys/mount.h>
+#include <vm/dynalloc.h>
+#include <string.h>
+
+mountlist_t g_mountlist;
+
+int
+vfs_alloc_vnode(struct vnode **res, int type)
+{
+ struct vnode *vp = dynalloc(sizeof(struct vnode));
+
+ if (vp == NULL) {
+ return -ENOMEM;
+ }
+
+ memset(vp, 0, sizeof(*vp));
+ vp->type = type;
+ *res = vp;
+ return 0;
+}
+
+/*
+ * Allocate a mount structure.
+ *
+ * @vp: Vnode this mount structure covers.
+ * @fip: File system information.
+ */
+struct mount *
+vfs_alloc_mount(struct vnode *vp, struct fs_info *fip)
+{
+ struct mount *mp;
+
+ mp = dynalloc(sizeof(*mp));
+
+ if (mp == NULL) {
+ return NULL;
+ }
+
+ memset(mp, 0, sizeof(*mp));
+ mp->vp = vp;
+ mp->mnt_ops = fip->vfsops;
+ return mp;
+}
+
+/*
+ * Release a vnode and its resources from
+ * memory.
+ */
+int
+vfs_release_vnode(struct vnode *vp)
+{
+ const struct vops *vops = vp->vops;
+ int status = 0;
+
+ if (vp == NULL) {
+ return -EINVAL;
+ }
+
+ if (vops->reclaim != NULL) {
+ status = vops->reclaim(vp);
+ }
+
+ dynfree(vp);
+ return status;
+}
+
+int
+vfs_vop_lookup(struct vnode *vp, struct vop_lookup_args *args)
+{
+ const struct vops *vops = vp->vops;
+
+ if (vops == NULL)
+ return -EIO;
+ if (vops->lookup == NULL)
+ return -EIO;
+
+ return vops->lookup(args);
+}
+
+int
+vfs_vop_read(struct vnode *vp, struct sio_txn *sio)
+{
+ const struct vops *vops = vp->vops;
+
+ if (vops == NULL)
+ return -EIO;
+ if (vops->read == NULL)
+ return -EIO;
+
+ return vops->read(vp, sio);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 02:01:19 +0000