static int
ramfs_mknod(struct vnode *dir, const char *name, size_t name_len, int mode, devid_t devid)
{
vnode_t *vn;
off_t i;
ramfs_dirent_t *entry;
KASSERT(0 != ramfs_lookup(dir, name, name_len, &vn));
/* Look for space in the directory */
entry = VNODE_TO_DIRENT(dir);
for (i = 0; i < RAMFS_MAX_DIRENT; i++, entry++) {
if (!entry->rd_name[0])
break;
}
if (i == RAMFS_MAX_DIRENT) {
return -ENOSPC;
}
int ino;
if (S_ISCHR(mode)) {
if (0 > (ino = ramfs_alloc_inode(dir->vn_fs, RAMFS_TYPE_CHR, devid))) {
return ino;
}
} else if (S_ISBLK(mode)) {
if (0 > (ino = ramfs_alloc_inode(dir->vn_fs, RAMFS_TYPE_BLK, devid))) {
return ino;
}
} else {
panic("Invalid mode!\n");
}
/* Set entry in directory */
entry->rd_ino = ino;
strncpy(entry->rd_name, name, MIN(name_len, NAME_LEN - 1));
entry->rd_name[MIN(name_len, NAME_LEN - 1)] = '\0';
VNODE_TO_RAMFSINODE(dir)->rf_size += sizeof(ramfs_dirent_t);
return 0;
}
static int
ramfs_mkdir(vnode_t *dir, const char *name, size_t name_len)
{
vnode_t *vn;
off_t i;
ramfs_dirent_t *entry;
dbg(DBG_INIT,"RAMFS_MKDIR before KASSERT %s\n",name);
KASSERT(0 != ramfs_lookup(dir, name, name_len, &vn));
/* Look for space in the directory */
entry = VNODE_TO_DIRENT(dir);
for (i = 0; i < RAMFS_MAX_DIRENT; i++, entry++) {
if (!entry->rd_name[0])
break;
}
if (i == RAMFS_MAX_DIRENT) {
return -ENOSPC;
}
/* Allocate an inode */
int ino;
if (0 > (ino = ramfs_alloc_inode(dir->vn_fs, RAMFS_TYPE_DIR, 0))) {
return ino;
}
/* Set entry in parent */
entry->rd_ino = ino;
strncpy(entry->rd_name, name, MIN(name_len, NAME_LEN - 1));
entry->rd_name[MIN(name_len, NAME_LEN - 1)] = '\0';
VNODE_TO_RAMFSINODE(dir)->rf_size += sizeof(ramfs_dirent_t);
/* Set up '.' and '..' in the directory */
entry = (ramfs_dirent_t *) VNODE_TO_RAMFS(dir)->rfs_inodes[ino]->rf_mem;
entry->rd_ino = ino;
strcpy(entry->rd_name, ".");
entry++;
entry->rd_ino = dir->vn_vno;
strcpy(entry->rd_name, "..");
/* Increase inode size accordingly */
VNODE_TO_RAMFS(dir)->rfs_inodes[ino]->rf_size = 2 * sizeof(ramfs_dirent_t);
return 0;
}
int
ramfs_mount(struct fs *fs)
{
/* Allocate filesystem */
ramfs_t *rfs = kmalloc(sizeof(ramfs_t));
if (NULL == rfs)
return -ENOMEM;
memset(rfs->rfs_inodes, 0, sizeof(rfs->rfs_inodes));
fs->fs_i = rfs;
fs->fs_op = &ramfs_ops;
/* Set up root inode */
int root_ino;
if (0 > (root_ino = ramfs_alloc_inode(fs, RAMFS_TYPE_DIR, 0))) {
return root_ino;
}
KASSERT(0 == root_ino);
ramfs_inode_t *root = rfs->rfs_inodes[root_ino];
/* Set up '.' and '..' in the root directory */
ramfs_dirent_t *rootdent = (ramfs_dirent_t *) root->rf_mem;
rootdent->rd_ino = 0;
strcpy(rootdent->rd_name, ".");
rootdent++;
rootdent->rd_ino = 0;
strcpy(rootdent->rd_name, "..");
/* Increase root inode size accordingly */
root->rf_size = 2 * sizeof(ramfs_dirent_t);
/* Put the root in the inode table */
rfs->rfs_inodes[0] = root;
/* And vget the root vnode */
fs->fs_root = vget(fs, 0);
return 0;
}
static int
ramfs_create(vnode_t *dir, const char *name, size_t name_len, vnode_t **result)
{
vnode_t *vn;
off_t i;
ramfs_dirent_t *entry;
KASSERT(0 != ramfs_lookup(dir, name, name_len, &vn));
/* Look for space in the directory */
entry = VNODE_TO_DIRENT(dir);
for (i = 0; i < RAMFS_MAX_DIRENT; i++, entry++) {
if (!entry->rd_name[0])
break;
}
if (i == RAMFS_MAX_DIRENT) {
return -ENOSPC;
}
/* Allocate an inode */
int ino;
if (0 > (ino = ramfs_alloc_inode(dir->vn_fs, RAMFS_TYPE_DATA, 0))) {
return ino;
}
/* Get a vnode, set entry in directory */
vn = vget(dir->vn_fs, (ino_t) ino);
entry->rd_ino = vn->vn_vno;
strncpy(entry->rd_name, name, MIN(name_len, NAME_LEN - 1));
entry->rd_name[MIN(name_len, NAME_LEN - 1)] = '\0';
VNODE_TO_RAMFSINODE(dir)->rf_size += sizeof(ramfs_dirent_t);
*result = vn;
return 0;
}