diff options
Diffstat (limited to 'sys/kern/vfs_mount.c')
| -rw-r--r-- | sys/kern/vfs_mount.c | 217 |
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); -} |