/* Create a new directory given a path */
int vmfs_dir_mkdir_at(vmfs_dir_t *d,const char *path,mode_t mode)
{
char *dir_name,*base_name;
vmfs_dir_t *dir;
vmfs_inode_t *new_inode = NULL;
int res;
dir_name = m_dirname(path);
base_name = m_basename(path);
if (!dir_name || !base_name) {
res = -EFAULT;
goto done;
}
if (!(dir = vmfs_dir_open_at(d,dir_name))) {
res = -ENOENT;
goto done;
}
res = vmfs_dir_create(dir,base_name,mode,&new_inode);
if (new_inode)
vmfs_inode_release(new_inode);
vmfs_dir_close(dir);
done:
free(dir_name);
free(base_name);
return(res);
}
/* Delete a directory */
int vmfs_dir_delete(vmfs_dir_t *d,const char *name)
{
vmfs_fs_t *fs = (vmfs_fs_t *)vmfs_dir_get_fs(d);
vmfs_dirent_t *entry;
vmfs_dir_t *sub;
off_t pos;
if (!vmfs_fs_readwrite(fs))
return(-EROFS);
if (!(entry = (vmfs_dirent_t *)vmfs_dir_lookup(d,name)))
return(-ENOENT);
if (entry->type != VMFS_FILE_TYPE_DIR)
return(-ENOTDIR);
if (!(sub = vmfs_dir_open_from_blkid(fs,entry->block_id)))
return(-ENOENT);
/* The directory must be empty (excepted for . and ..) */
if (vmfs_file_get_size(sub->dir) != (2 * VMFS_DIRENT_SIZE)) {
vmfs_dir_close(sub);
return(-ENOTEMPTY);
}
d->dir->inode->nlink--;
sub->dir->inode->nlink = 1;
sub->dir->inode->update_flags |= VMFS_INODE_SYNC_META;
/* Update the parent directory */
pos = (d->pos - 1) * VMFS_DIRENT_SIZE;
vmfs_dir_unlink_inode(d,pos,entry);
vmfs_dir_close(sub);
return(0);
}
/// open device
static void fs_open(char* device){
#ifndef VMFS5_ZLA_BASE
vmfs_lvm_t *lvm;
#endif
vmfs_flags_t flags;
char *mdev[] = {device, NULL};
vmfs_host_init();
flags.packed = 0;
flags.allow_missing_extents = 1;
log_mesg(3, 0, 0, fs_opt.debug, "%s: device %s\n", __FILE__, device);
#ifdef VMFS5_ZLA_BASE
if (!(fs=vmfs_fs_open(mdev, flags))) {
#else
if (!(lvm = vmfs_lvm_create(flags))) {
log_mesg(0, 1, 1, fs_opt.debug, "%s: Unable to create LVM structure\n", __FILE__);
}
if (vmfs_lvm_add_extent(lvm, vmfs_vol_open(device, flags)) == -1) {
log_mesg(0, 1, 1, fs_opt.debug, "%s: Unable to open device/file \"%s\".\n", __FILE__, device);
}
if (!(fs = vmfs_fs_create(lvm))) {
log_mesg(0, 1, 1, fs_opt.debug, "%s: Unable to open filesystem\n", __FILE__);
}
if (vmfs_fs_open(fs) == -1) {
#endif
log_mesg(0, 1, 1, fs_opt.debug, "%s: Unable to open volume.\n", __FILE__);
}
if (!(root_dir = vmfs_dir_open_from_blkid(fs,VMFS_BLK_FD_BUILD(0,0,0)))) {
log_mesg(0, 1, 1, fs_opt.debug, "%s: Unable to open root directory\n", __FILE__);
}
}
/// close device
static void fs_close(){
vmfs_dir_close(root_dir);
vmfs_fs_close(fs);
}
/* Resolve a path name to a block id */
uint32_t vmfs_dir_resolve_path(vmfs_dir_t *base_dir,const char *path,
int follow_symlink)
{
vmfs_dir_t *cur_dir,*sub_dir;
const vmfs_dirent_t *rec;
char *nam, *ptr,*sl,*symlink;
int close_dir = 0;
const vmfs_fs_t *fs = vmfs_dir_get_fs(base_dir);
uint32_t ret = 0;
cur_dir = base_dir;
if (*path == '/') {
if (!(cur_dir = vmfs_dir_open_from_blkid(fs,VMFS_BLK_FD_BUILD(0, 0, 0))))
return(0);
path++;
close_dir = 1;
}
if (!(rec = vmfs_dir_lookup(cur_dir,".")))
return(0);
ret = rec->block_id;
nam = ptr = strdup(path);
while(*ptr != 0) {
sl = strchr(ptr,'/');
if (sl != NULL)
*sl = 0;
if (*ptr == 0) {
ptr = sl + 1;
continue;
}
if (!(rec = vmfs_dir_lookup(cur_dir,ptr))) {
ret = 0;
break;
}
ret = rec->block_id;
if ((sl == NULL) && !follow_symlink)
break;
/* follow the symlink if we have an entry of this type */
if (rec->type == VMFS_FILE_TYPE_SYMLINK) {
if (!(symlink = vmfs_dirent_read_symlink(fs,rec))) {
ret = 0;
break;
}
ret = vmfs_dir_resolve_path(cur_dir,symlink,1);
free(symlink);
if (!ret)
break;
}
/* last token */
if (sl == NULL)
break;
/* we must have a directory here */
if (!(sub_dir = vmfs_dir_open_from_blkid(fs,ret)))
{
ret = 0;
break;
}
if (close_dir)
vmfs_dir_close(cur_dir);
cur_dir = sub_dir;
close_dir = 1;
ptr = sl + 1;
}
free(nam);
if (close_dir)
vmfs_dir_close(cur_dir);
return(ret);
}