void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
{
struct vfs_fsp_data *head;
head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
if (head != NULL) {
return EXT_DATA_AREA(head);
}
return NULL;
}
void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
{
struct vfs_fsp_data *head;
for (head = fsp->vfs_extension; head; head = head->next) {
if (head->owner == handle) {
return EXT_DATA_AREA(head);
}
}
return NULL;
}
void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle, files_struct *fsp, size_t ext_size)
{
struct vfs_fsp_data *ext;
void * ext_data;
/* Prevent VFS modules adding multiple extensions. */
if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
return ext_data;
}
ext = (struct vfs_fsp_data *)TALLOC_ZERO(
handle->conn->mem_ctx, sizeof(struct vfs_fsp_data) + ext_size);
if (ext == NULL) {
return NULL;
}
ext->owner = handle;
ext->next = fsp->vfs_extension;
fsp->vfs_extension = ext;
return EXT_DATA_AREA(ext);
}
void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
{
struct vfs_fsp_data *curr;
struct vfs_fsp_data *prev;
for (curr = fsp->vfs_extension, prev = NULL;
curr;
prev = curr, curr = curr->next) {
if (curr->owner == handle) {
if (prev) {
prev->next = curr->next;
} else {
fsp->vfs_extension = curr->next;
}
if (curr->destroy) {
curr->destroy(EXT_DATA_AREA(curr));
}
TALLOC_FREE(curr);
return;
}
}
}