/*
* Deallocate a tree: release all resources associated with a tree and
* remove the tree from the user's tree list.
*
* The tree being destroyed must be in the "destroying" state and the
* reference count must be zero. This function assumes it's single threaded
* i.e. only one thread will attempt to destroy a specific tree, which
* should be the case if the tree is in disconnected and has a reference
* count of zero.
*/
static void
smb_tree_dealloc(smb_tree_t *tree)
{
ASSERT(tree);
ASSERT(tree->t_magic == SMB_TREE_MAGIC);
ASSERT(tree->t_state == SMB_TREE_STATE_DISCONNECTED);
ASSERT(tree->t_refcnt == 0);
/*
* Remove the tree from the user's tree list. This must be done
* before any resources associated with the tree are released.
*/
smb_llist_enter(&tree->t_user->u_tree_list, RW_WRITER);
smb_llist_remove(&tree->t_user->u_tree_list, tree);
smb_llist_exit(&tree->t_user->u_tree_list);
tree->t_magic = (uint32_t)~SMB_TREE_MAGIC;
smb_idpool_free(&tree->t_user->u_tid_pool, tree->t_tid);
atomic_dec_32(&tree->t_session->s_tree_cnt);
if (tree->t_snode)
smb_node_release(tree->t_snode);
mutex_destroy(&tree->t_mutex);
/*
* The list of open files and open directories should be empty.
*/
smb_llist_destructor(&tree->t_ofile_list);
smb_llist_destructor(&tree->t_odir_list);
smb_idpool_destructor(&tree->t_fid_pool);
smb_idpool_destructor(&tree->t_odid_pool);
kmem_cache_free(tree->t_server->si_cache_tree, tree);
}
/*
* Delete an odir.
*
* Remove the odir from the tree list before freeing resources
* associated with the odir.
*/
void
smb_odir_delete(void *arg)
{
smb_tree_t *tree;
smb_odir_t *od = (smb_odir_t *)arg;
SMB_ODIR_VALID(od);
ASSERT(od->d_refcnt == 0);
ASSERT(od->d_state == SMB_ODIR_STATE_CLOSED);
tree = od->d_tree;
smb_llist_enter(&tree->t_odir_list, RW_WRITER);
smb_llist_remove(&tree->t_odir_list, od);
smb_idpool_free(&tree->t_odid_pool, od->d_odid);
atomic_dec_32(&tree->t_session->s_dir_cnt);
smb_llist_exit(&tree->t_odir_list);
mutex_enter(&od->d_mutex);
mutex_exit(&od->d_mutex);
od->d_magic = 0;
smb_node_release(od->d_dnode);
smb_user_release(od->d_user);
mutex_destroy(&od->d_mutex);
kmem_cache_free(smb_cache_odir, od);
}
/*
* Delete an ofile.
*
* Remove the ofile from the tree list before freeing resources
* associated with the ofile.
*/
void
smb_ofile_delete(void *arg)
{
smb_tree_t *tree;
smb_ofile_t *of = (smb_ofile_t *)arg;
SMB_OFILE_VALID(of);
ASSERT(of->f_refcnt == 0);
ASSERT(of->f_state == SMB_OFILE_STATE_CLOSED);
ASSERT(!SMB_OFILE_OPLOCK_GRANTED(of));
tree = of->f_tree;
smb_llist_enter(&tree->t_ofile_list, RW_WRITER);
smb_llist_remove(&tree->t_ofile_list, of);
smb_idpool_free(&tree->t_fid_pool, of->f_fid);
atomic_dec_32(&tree->t_session->s_file_cnt);
smb_llist_exit(&tree->t_ofile_list);
mutex_enter(&of->f_mutex);
mutex_exit(&of->f_mutex);
switch (of->f_ftype) {
case SMB_FTYPE_BYTE_PIPE:
case SMB_FTYPE_MESG_PIPE:
smb_opipe_dealloc(of->f_pipe);
of->f_pipe = NULL;
break;
case SMB_FTYPE_DISK:
if (of->f_odir != NULL)
smb_odir_release(of->f_odir);
smb_node_rem_ofile(of->f_node, of);
smb_node_release(of->f_node);
break;
default:
ASSERT(!"f_ftype");
break;
}
of->f_magic = (uint32_t)~SMB_OFILE_MAGIC;
mutex_destroy(&of->f_mutex);
crfree(of->f_cr);
smb_user_release(of->f_user);
kmem_cache_free(smb_cache_ofile, of);
}
/*
* smb_ofile_open
*/
smb_ofile_t *
smb_ofile_open(
smb_tree_t *tree,
smb_node_t *node,
uint16_t pid,
struct open_param *op,
uint16_t ftype,
uint32_t uniqid,
smb_error_t *err)
{
smb_ofile_t *of;
uint16_t fid;
smb_attr_t attr;
int rc;
if (smb_idpool_alloc(&tree->t_fid_pool, &fid)) {
err->status = NT_STATUS_TOO_MANY_OPENED_FILES;
err->errcls = ERRDOS;
err->errcode = ERROR_TOO_MANY_OPEN_FILES;
return (NULL);
}
of = kmem_cache_alloc(tree->t_server->si_cache_ofile, KM_SLEEP);
bzero(of, sizeof (smb_ofile_t));
of->f_magic = SMB_OFILE_MAGIC;
of->f_refcnt = 1;
of->f_fid = fid;
of->f_uniqid = uniqid;
of->f_opened_by_pid = pid;
of->f_granted_access = op->desired_access;
of->f_share_access = op->share_access;
of->f_create_options = op->create_options;
of->f_cr = (op->create_options & FILE_OPEN_FOR_BACKUP_INTENT) ?
smb_user_getprivcred(tree->t_user) : tree->t_user->u_cred;
crhold(of->f_cr);
of->f_ftype = ftype;
of->f_server = tree->t_server;
of->f_session = tree->t_user->u_session;
of->f_user = tree->t_user;
of->f_tree = tree;
of->f_node = node;
mutex_init(&of->f_mutex, NULL, MUTEX_DEFAULT, NULL);
of->f_state = SMB_OFILE_STATE_OPEN;
if (ftype == SMB_FTYPE_MESG_PIPE) {
of->f_pipe = smb_opipe_alloc(tree->t_server);
smb_server_inc_pipes(of->f_server);
} else {
ASSERT(ftype == SMB_FTYPE_DISK); /* Regular file, not a pipe */
ASSERT(node);
if (of->f_granted_access == FILE_EXECUTE)
of->f_flags |= SMB_OFLAGS_EXECONLY;
bzero(&attr, sizeof (smb_attr_t));
attr.sa_mask = SMB_AT_UID | SMB_AT_DOSATTR;
rc = smb_node_getattr(NULL, node, of->f_cr, NULL, &attr);
if (rc != 0) {
of->f_magic = 0;
mutex_destroy(&of->f_mutex);
crfree(of->f_cr);
smb_idpool_free(&tree->t_fid_pool, of->f_fid);
kmem_cache_free(tree->t_server->si_cache_ofile, of);
err->status = NT_STATUS_INTERNAL_ERROR;
err->errcls = ERRDOS;
err->errcode = ERROR_INTERNAL_ERROR;
return (NULL);
}
if (crgetuid(of->f_cr) == attr.sa_vattr.va_uid) {
/*
* Add this bit for the file's owner even if it's not
* specified in the request (Windows behavior).
*/
of->f_granted_access |= FILE_READ_ATTRIBUTES;
}
if (smb_node_is_file(node)) {
of->f_mode =
smb_fsop_amask_to_omode(of->f_granted_access);
if (smb_fsop_open(node, of->f_mode, of->f_cr) != 0) {
of->f_magic = 0;
mutex_destroy(&of->f_mutex);
crfree(of->f_cr);
smb_idpool_free(&tree->t_fid_pool, of->f_fid);
kmem_cache_free(tree->t_server->si_cache_ofile,
of);
err->status = NT_STATUS_ACCESS_DENIED;
err->errcls = ERRDOS;
err->errcode = ERROR_ACCESS_DENIED;
return (NULL);
}
}
if (tree->t_flags & SMB_TREE_READONLY)
of->f_flags |= SMB_OFLAGS_READONLY;
/*
* Note that if we created_readonly, that
* will _not_ yet show in attr.sa_dosattr
* so creating a readonly file gives the
* caller a writable handle as it should.
*/
if (attr.sa_dosattr & FILE_ATTRIBUTE_READONLY)
of->f_flags |= SMB_OFLAGS_READONLY;
smb_node_inc_open_ofiles(node);
smb_node_add_ofile(node, of);
smb_node_ref(node);
smb_server_inc_files(of->f_server);
}
smb_llist_enter(&tree->t_ofile_list, RW_WRITER);
smb_llist_insert_tail(&tree->t_ofile_list, of);
smb_llist_exit(&tree->t_ofile_list);
atomic_inc_32(&tree->t_open_files);
atomic_inc_32(&of->f_session->s_file_cnt);
return (of);
}
/*
* smb_ofile_open
*/
smb_ofile_t *
smb_ofile_open(
smb_request_t *sr,
smb_node_t *node,
struct open_param *op,
uint16_t ftype,
uint32_t uniqid,
smb_error_t *err)
{
smb_tree_t *tree = sr->tid_tree;
smb_ofile_t *of;
uint16_t fid;
smb_attr_t attr;
int rc;
enum errstates { EMPTY, FIDALLOC, CRHELD, MUTEXINIT };
enum errstates state = EMPTY;
if (smb_idpool_alloc(&tree->t_fid_pool, &fid)) {
err->status = NT_STATUS_TOO_MANY_OPENED_FILES;
err->errcls = ERRDOS;
err->errcode = ERROR_TOO_MANY_OPEN_FILES;
return (NULL);
}
state = FIDALLOC;
of = kmem_cache_alloc(smb_cache_ofile, KM_SLEEP);
bzero(of, sizeof (smb_ofile_t));
of->f_magic = SMB_OFILE_MAGIC;
of->f_refcnt = 1;
of->f_fid = fid;
of->f_uniqid = uniqid;
of->f_opened_by_pid = sr->smb_pid;
of->f_granted_access = op->desired_access;
of->f_share_access = op->share_access;
of->f_create_options = op->create_options;
of->f_cr = (op->create_options & FILE_OPEN_FOR_BACKUP_INTENT) ?
smb_user_getprivcred(sr->uid_user) : sr->uid_user->u_cred;
crhold(of->f_cr);
state = CRHELD;
of->f_ftype = ftype;
of->f_server = tree->t_server;
of->f_session = tree->t_session;
/*
* grab a ref for of->f_user
* released in smb_ofile_delete()
*/
smb_user_hold_internal(sr->uid_user);
of->f_user = sr->uid_user;
of->f_tree = tree;
of->f_node = node;
mutex_init(&of->f_mutex, NULL, MUTEX_DEFAULT, NULL);
state = MUTEXINIT;
of->f_state = SMB_OFILE_STATE_OPEN;
if (ftype == SMB_FTYPE_MESG_PIPE) {
/* See smb_opipe_open. */
of->f_pipe = op->pipe;
smb_server_inc_pipes(of->f_server);
} else {
ASSERT(ftype == SMB_FTYPE_DISK); /* Regular file, not a pipe */
ASSERT(node);
/*
* Note that the common open path often adds bits like
* READ_CONTROL, so the logic "is this open exec-only"
* needs to look at only the FILE_DATA_ALL bits.
*/
if ((of->f_granted_access & FILE_DATA_ALL) == FILE_EXECUTE)
of->f_flags |= SMB_OFLAGS_EXECONLY;
bzero(&attr, sizeof (smb_attr_t));
attr.sa_mask = SMB_AT_UID | SMB_AT_DOSATTR;
rc = smb_node_getattr(NULL, node, of->f_cr, NULL, &attr);
if (rc != 0) {
err->status = NT_STATUS_INTERNAL_ERROR;
err->errcls = ERRDOS;
err->errcode = ERROR_INTERNAL_ERROR;
goto errout;
}
if (crgetuid(of->f_cr) == attr.sa_vattr.va_uid) {
/*
* Add this bit for the file's owner even if it's not
* specified in the request (Windows behavior).
*/
of->f_granted_access |= FILE_READ_ATTRIBUTES;
}
if (smb_node_is_file(node)) {
of->f_mode =
smb_fsop_amask_to_omode(of->f_granted_access);
if (smb_fsop_open(node, of->f_mode, of->f_cr) != 0) {
err->status = NT_STATUS_ACCESS_DENIED;
err->errcls = ERRDOS;
err->errcode = ERROR_ACCESS_DENIED;
goto errout;
}
}
if (tree->t_flags & SMB_TREE_READONLY)
of->f_flags |= SMB_OFLAGS_READONLY;
/*
* Note that if we created_readonly, that
* will _not_ yet show in attr.sa_dosattr
* so creating a readonly file gives the
* caller a writable handle as it should.
*/
if (attr.sa_dosattr & FILE_ATTRIBUTE_READONLY)
of->f_flags |= SMB_OFLAGS_READONLY;
smb_node_inc_open_ofiles(node);
smb_node_add_ofile(node, of);
smb_node_ref(node);
smb_server_inc_files(of->f_server);
}
smb_llist_enter(&tree->t_ofile_list, RW_WRITER);
smb_llist_insert_tail(&tree->t_ofile_list, of);
smb_llist_exit(&tree->t_ofile_list);
atomic_inc_32(&tree->t_open_files);
atomic_inc_32(&of->f_session->s_file_cnt);
return (of);
errout:
switch (state) {
case MUTEXINIT:
mutex_destroy(&of->f_mutex);
smb_user_release(of->f_user);
/*FALLTHROUGH*/
case CRHELD:
crfree(of->f_cr);
of->f_magic = 0;
kmem_cache_free(smb_cache_ofile, of);
/*FALLTHROUGH*/
case FIDALLOC:
smb_idpool_free(&tree->t_fid_pool, fid);
/*FALLTHROUGH*/
case EMPTY:
break;
}
return (NULL);
}
/*
* 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);
}
