/*
* If a hold on the specified VFS has already been taken
* then only increment the reference count of the corresponding
* smb_vfs_t structure. If no smb_vfs_t structure has been created
* yet for the specified VFS then create one and take a hold on
* the VFS.
*/
int
smb_vfs_hold(smb_export_t *se, vfs_t *vfsp)
{
smb_vfs_t *smb_vfs;
vnode_t *rootvp;
int rc;
if (se == NULL || vfsp == NULL)
return (EINVAL);
smb_llist_enter(&se->e_vfs_list, RW_WRITER);
if ((smb_vfs = smb_vfs_find(se, vfsp)) != NULL) {
smb_vfs->sv_refcnt++;
DTRACE_PROBE1(smb_vfs_hold_hit, smb_vfs_t *, smb_vfs);
smb_llist_exit(&se->e_vfs_list);
return (0);
}
if ((rc = VFS_ROOT(vfsp, &rootvp)) != 0) {
smb_llist_exit(&se->e_vfs_list);
return (rc);
}
smb_vfs = kmem_cache_alloc(smb_kshare_cache_vfs, KM_SLEEP);
bzero(smb_vfs, sizeof (smb_vfs_t));
smb_vfs->sv_magic = SMB_VFS_MAGIC;
smb_vfs->sv_refcnt = 1;
smb_vfs->sv_vfsp = vfsp;
/*
* We have a hold on the root vnode of the file system
* from the VFS_ROOT call above.
*/
smb_vfs->sv_rootvp = rootvp;
smb_llist_insert_head(&se->e_vfs_list, smb_vfs);
DTRACE_PROBE1(smb_vfs_hold_miss, smb_vfs_t *, smb_vfs);
smb_llist_exit(&se->e_vfs_list);
return (0);
}
/*
* Allocate a tree.
*/
static smb_tree_t *
smb_tree_alloc(
smb_user_t *user,
const smb_share_t *si,
int32_t stype,
smb_node_t *snode,
uint32_t access)
{
smb_tree_t *tree;
uint16_t tid;
if (smb_idpool_alloc(&user->u_tid_pool, &tid))
return (NULL);
tree = kmem_cache_alloc(user->u_server->si_cache_tree, KM_SLEEP);
bzero(tree, sizeof (smb_tree_t));
if (STYPE_ISDSK(stype)) {
if (smb_tree_getattr(si, snode, tree) != 0) {
smb_idpool_free(&user->u_tid_pool, tid);
kmem_cache_free(user->u_server->si_cache_tree, tree);
return (NULL);
}
}
if (smb_idpool_constructor(&tree->t_fid_pool)) {
smb_idpool_free(&user->u_tid_pool, tid);
kmem_cache_free(user->u_server->si_cache_tree, tree);
return (NULL);
}
if (smb_idpool_constructor(&tree->t_odid_pool)) {
smb_idpool_destructor(&tree->t_fid_pool);
smb_idpool_free(&user->u_tid_pool, tid);
kmem_cache_free(user->u_server->si_cache_tree, tree);
return (NULL);
}
smb_llist_constructor(&tree->t_ofile_list, sizeof (smb_ofile_t),
offsetof(smb_ofile_t, f_lnd));
smb_llist_constructor(&tree->t_odir_list, sizeof (smb_odir_t),
offsetof(smb_odir_t, d_lnd));
(void) strlcpy(tree->t_sharename, si->shr_name,
sizeof (tree->t_sharename));
(void) strlcpy(tree->t_resource, si->shr_path,
sizeof (tree->t_resource));
mutex_init(&tree->t_mutex, NULL, MUTEX_DEFAULT, NULL);
tree->t_user = user;
tree->t_session = user->u_session;
tree->t_server = user->u_server;
tree->t_refcnt = 1;
tree->t_tid = tid;
tree->t_res_type = stype;
tree->t_state = SMB_TREE_STATE_CONNECTED;
tree->t_magic = SMB_TREE_MAGIC;
tree->t_access = access;
tree->t_connect_time = gethrestime_sec();
/* if FS is readonly, enforce that here */
if (tree->t_flags & SMB_TREE_READONLY)
tree->t_access &= ~ACE_ALL_WRITE_PERMS;
if (STYPE_ISDSK(stype)) {
smb_node_ref(snode);
tree->t_snode = snode;
tree->t_acltype = smb_fsop_acltype(snode);
}
smb_llist_enter(&user->u_tree_list, RW_WRITER);
smb_llist_insert_head(&user->u_tree_list, tree);
smb_llist_exit(&user->u_tree_list);
atomic_inc_32(&user->u_session->s_tree_cnt);
atomic_inc_32(&user->u_server->sv_open_trees);
return (tree);
}