aboutsummaryrefslogtreecommitdiff
path: root/sys/kern/vfs_mount.c
diff options
context:
space:
mode:
authorIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
committerIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
commit236963e7563be3e3f8220dac7bb4af446928e194 (patch)
treee521ea226db0345bbb3679fffe09d96254b7dc73 /sys/kern/vfs_mount.c
parent214eadc62b5578f76c98a38a28f8b3d80ac4d6ad (diff)
Clean out for expt
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/kern/vfs_mount.c')
-rw-r--r--sys/kern/vfs_mount.c217
1 files changed, 0 insertions, 217 deletions
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
deleted file mode 100644
index 27d0ec3..0000000
--- a/sys/kern/vfs_mount.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * 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/types.h>
-#include <sys/queue.h>
-#include <sys/mount.h>
-#include <sys/vfs.h>
-#include <sys/errno.h>
-#include <vm/dynalloc.h>
-#include <assert.h>
-#include <string.h>
-
-/* TODO: Make this more flexible */
-#define MOUNTLIST_SIZE 8
-
-/* Mountlist entry */
-struct mountlist_entry {
- TAILQ_HEAD(, mount) buckets;
-};
-
-static struct mountlist_entry *mountlist = NULL;
-
-static int
-vfs_create_mp(const char *path, int mntflags, struct mount **mp_out)
-{
- struct mount *mp;
-
- mp = dynalloc(sizeof(struct mount));
- if (mp == NULL) {
- return -ENOMEM;
- }
-
- mp->flags = mntflags;
- *mp_out = mp;
- return 0;
-}
-
-static int
-mount(const char *source, const char *target, const char *filesystemtype,
- unsigned long mountflags, const void *data)
-{
- struct vnode *source_vnode;
- struct fs_info *info;
- int status;
-
- if (source == NULL || target == NULL || filesystemtype == NULL)
- return -EFAULT;
-
- /*
- * Check mount flags.
- *
- * XXX: No flags implemented yet.
- */
- if (mountflags != 0)
- return -EINVAL;
-
- /* Locate source, if any */
- if (strcmp(source, "none") == 0) {
- source_vnode = NULL;
- } else {
- status = vfs_path_to_node(source, &source_vnode);
- if (status != 0)
- return status;
- }
-
- /* Locate filesystem */
- info = vfs_byname(filesystemtype);
- if (info == NULL)
- return -ENODEV;
-
- /* Create mount point */
- status = vfs_mount(target, 0, info);
- if (status != 0)
- return status;
-
- /* Initialize filesystem if needed */
- if (info->vfsops->init != NULL)
- return info->vfsops->init(info, source_vnode);
-
- return 0;
-}
-
-/*
- * Mount a mountpoint
- *
- * @path: Path this mountpoint belongs to
- * @mntflags: Flags to mount with
- * @fs: Filesystem to mount
- *
- * If this mount entry already exists, -EEXIST
- * will be returned.
- */
-int
-vfs_mount(const char *path, int mntflags, struct fs_info *fs)
-{
- size_t hash;
- int status;
- struct mountlist_entry *entry;
- struct mount *mp;
-
- /* Exclude leading slash */
- if (*path == '/') {
- ++path;
- }
-
- hash = vfs_hash_path(path);
-
- if ((status = vfs_create_mp(path, mntflags, &mp)) != 0) {
- return status;
- }
-
- if (hash == -1) {
- /* Something is wrong with the path */
- return -EINVAL;
- }
-
- if (vfs_get_mp(path, NULL) == 0) {
- /* mount hit, do not duplicate this entry */
- return -EEXIST;
- }
-
- if ((status = vfs_alloc_vnode(&fs->vnode, mp, VDIR)) != 0) {
- return status;
- }
-
- mp->phash = hash;
- mp->fs = fs;
- fs->vnode->vops = fs->vops;
-
- entry = &mountlist[hash % MOUNTLIST_SIZE];
- TAILQ_INSERT_TAIL(&entry->buckets, mp, link);
- return 0;
-}
-
-/*
- * Fetch mountpoint
- *
- * @path: Path of target mountpoint
- * @mp: Pointer of variable where mountpoint fetched will
- * be stored
- *
- * Returns 0 upon a mplist hit, on a mplist miss this
- * function returns -ENOENT.
- */
-int
-vfs_get_mp(const char *path, struct mount **mp)
-{
- size_t hash;
- struct mountlist_entry *entry;
- struct mount *mount_iter;
-
- /* Exclude leading slash */
- if (*path == '/') {
- ++path;
- }
-
- hash = vfs_hash_path(path);
-
- if (hash == 0) {
- /* Something is wrong with the path */
- return -EINVAL;
- }
-
- entry = &mountlist[hash % MOUNTLIST_SIZE];
- TAILQ_FOREACH(mount_iter, &entry->buckets, link) {
- if (mount_iter->phash == hash) {
- if (mp != NULL) *mp = mount_iter;
- return 0;
- }
- }
-
- return -ENOENT;
-}
-
-void
-vfs_mount_init(void)
-{
- mountlist = dynalloc(sizeof(struct mountlist_entry) * MOUNTLIST_SIZE);
- __assert(mountlist != NULL);
-
- for (size_t i = 0; i < MOUNTLIST_SIZE; ++i) {
- TAILQ_INIT(&mountlist[i].buckets);
- }
-}
-
-uint64_t
-sys_mount(struct syscall_args *args)
-{
- return mount((void *)args->arg0, (void *)args->arg1, (void *)args->arg2,
- (unsigned long)args->arg3, (void *)args->arg4);
-}