blob: 7f56792f7d0c99b74aa649644c4637d5c54ede48 [file] [log] [blame]
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2017 by Delphix. All rights reserved.
* Copyright 2019 Nexenta by DDN, Inc. All rights reserved.
* Copyright 2022 RackTop Systems, Inc.
*/
/*
* General Structures Layout
* -------------------------
*
* This is a simplified diagram showing the relationship between most of the
* main structures.
*
* +-------------------+
* | SMB_SERVER |
* +-------------------+
* |
* |
* v
* +-------------------+ +-------------------+ +-------------------+
* | SESSION |<----->| SESSION |......| SESSION |
* +-------------------+ +-------------------+ +-------------------+
* |
* |
* v
* +-------------------+ +-------------------+ +-------------------+
* | USER |<----->| USER |......| USER |
* +-------------------+ +-------------------+ +-------------------+
* |
* |
* v
* +-------------------+ +-------------------+ +-------------------+
* | TREE |<----->| TREE |......| TREE |
* +-------------------+ +-------------------+ +-------------------+
* | |
* | |
* | v
* | +-------+ +-------+ +-------+
* | | OFILE |<----->| OFILE |......| OFILE |
* | +-------+ +-------+ +-------+
* |
* |
* v
* +-------+ +------+ +------+
* | ODIR |<----->| ODIR |......| ODIR |
* +-------+ +------+ +------+
*
*
* Module Interface Overview
* -------------------------
*
*
* +===================================+
* | smbd daemon |
* +===================================+
* | | ^
* | | |
* User | | |
* -----------|--------------|----------------|--------------------------------
* Kernel | | |
* | | |
* | | |
* +=========|==============|================|=================+
* | v v | |
* | +-----------+ +--------------------+ +------------------+ |
* | | IO | | Kernel Door Server | | User Door Servers| |
* | | Interface | | Interface | | Interface | |
* | +-----------+ +--------------------+ +------------------+ |
* | | | ^ ^ |
* | v v | | | +=========+
* | +-----------------------------------+ | | | |
* | + SMB Server Management (this file) |<------------------| ZFS |
* | +-----------------------------------+ | | | |
* | | | | Module |
* | +-----------------------------------+ | | | |
* | + SMB Server Internal Layers |------+ | +=========+
* | +-----------------------------------+ |
* | |
* | |
* +===========================================================+
*
*
* Server State Machine
* --------------------
* |
* | T0
* |
* v
* +-----------------------------+
* | SMB_SERVER_STATE_CREATED |
* +-----------------------------+
* |
* | T1
* |
* v
* +-----------------------------+
* | SMB_SERVER_STATE_CONFIGURED |
* +-----------------------------+
* |
* | T2
* |
* v
* +-----------------------------+
* | SMB_SERVER_STATE_RUNNING / |
* | SMB_SERVER_STATE_STOPPING |
* +-----------------------------+
* |
* | T3
* |
* v
* +-----------------------------+
* | SMB_SERVER_STATE_DELETING |
* +-----------------------------+
* |
* |
* |
* v
*
* States
* ------
*
* SMB_SERVER_STATE_CREATED
*
* This is the state of the server just after creation.
*
* SMB_SERVER_STATE_CONFIGURED
*
* The server has been configured.
*
* SMB_SERVER_STATE_RUNNING
*
* The server has been started. While in this state the threads listening on
* the sockets are started.
*
* When a client establishes a connection the thread listening dispatches
* a task with the new session as an argument. If the dispatch fails the new
* session context is destroyed.
*
* SMB_SERVER_STATE_STOPPING
*
* The threads listening on the NBT and TCP sockets are being terminated.
*
*
* Transitions
* -----------
*
* Transition T0
*
* The daemon smbd triggers its creation by opening the smbsrv device. If
* the zone where the daemon lives doesn't have an smb server yet it is
* created.
*
* smb_drv_open() --> smb_server_create()
*
* Transition T1
*
* This transition occurs in smb_server_configure(). It is triggered by the
* daemon through an Ioctl.
*
* smb_drv_ioctl(SMB_IOC_CONFIG) --> smb_server_configure()
*
* Transition T2
*
* This transition occurs in smb_server_start(). It is triggered by the
* daemon through an Ioctl.
*
* smb_drv_ioctl(SMB_IOC_START) --> smb_server_start()
*
* Transition T3
*
* This transition occurs in smb_server_delete(). It is triggered by the
* daemon when closing the smbsrv device
*
* smb_drv_close() --> smb_server_delete()
*
* Comments
* --------
*
* This files assumes that there will one SMB server per zone. For now the
* smb server works only in global zone. There's nothing in this file preventing
* an smb server from being created in a non global zone. That limitation is
* enforced in user space.
*/
#include <sys/cmn_err.h>
#include <sys/priv.h>
#include <sys/zone.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <smbsrv/smb2_kproto.h>
#include <smbsrv/string.h>
#include <smbsrv/netbios.h>
#include <smbsrv/smb_fsops.h>
#include <smbsrv/smb_share.h>
#include <smbsrv/smb_door.h>
#include <smbsrv/smb_kstat.h>
static void smb_server_kstat_init(smb_server_t *);
static void smb_server_kstat_fini(smb_server_t *);
static void smb_server_timers(smb_thread_t *, void *);
static void smb_server_store_cfg(smb_server_t *, smb_ioc_cfg_t *);
static void smb_server_shutdown(smb_server_t *);
static int smb_server_fsop_start(smb_server_t *);
static void smb_server_fsop_stop(smb_server_t *);
static void smb_event_cancel(smb_server_t *, uint32_t);
static uint32_t smb_event_alloc_txid(void);
static void smb_server_disconnect_share(smb_server_t *, const char *);
static void smb_server_enum_users(smb_server_t *, smb_svcenum_t *);
static void smb_server_enum_trees(smb_server_t *, smb_svcenum_t *);
static int smb_server_session_disconnect(smb_server_t *, const char *,
const char *);
static int smb_server_fclose(smb_server_t *, uint32_t);
static int smb_server_kstat_update(kstat_t *, int);
static int smb_server_legacy_kstat_update(kstat_t *, int);
static void smb_server_listener_init(smb_server_t *, smb_listener_daemon_t *,
char *, in_port_t, int);
static void smb_server_listener_destroy(smb_listener_daemon_t *);
static int smb_server_listener_start(smb_listener_daemon_t *);
static void smb_server_listener_stop(smb_listener_daemon_t *);
static void smb_server_listener(smb_thread_t *, void *);
static void smb_server_receiver(void *);
static void smb_server_create_session(smb_listener_daemon_t *, ksocket_t);
static void smb_server_destroy_session(smb_session_t *);
static uint16_t smb_spool_get_fid(smb_server_t *);
static boolean_t smb_spool_lookup_doc_byfid(smb_server_t *, uint16_t,
smb_kspooldoc_t *);
/*
* How many "buckets" should our hash tables use? On a "real" server,
* make them much larger than the number of CPUs we're likely to have.
* On "fksmbd" make it smaller so dtrace logs are shorter.
* These must be powers of two.
*/
#ifdef _KERNEL
#define DEFAULT_HASH_NBUCKETS 256 /* real server */
#else
#define DEFAULT_HASH_NBUCKETS 16 /* for "fksmbd" */
#endif
uint32_t SMB_OFILE_HASH_NBUCKETS = DEFAULT_HASH_NBUCKETS;
uint32_t SMB_LEASE_HASH_NBUCKETS = DEFAULT_HASH_NBUCKETS;
int smb_event_debug = 0;
static smb_llist_t smb_servers;
/* for smb_server_destroy_session() */
static smb_llist_t smb_server_session_zombies;
kmem_cache_t *smb_cache_request;
kmem_cache_t *smb_cache_session;
kmem_cache_t *smb_cache_user;
kmem_cache_t *smb_cache_tree;
kmem_cache_t *smb_cache_ofile;
kmem_cache_t *smb_cache_odir;
kmem_cache_t *smb_cache_opipe;
kmem_cache_t *smb_cache_event;
kmem_cache_t *smb_cache_lock;
/*
* *****************************************************************************
* **************** Functions called from the device interface *****************
* *****************************************************************************
*
* These functions typically have to determine the relevant smb server
* to which the call applies.
*/
/*
* How many zones have an SMB server active?
*/
int
smb_server_get_count(void)
{
return (smb_llist_get_count(&smb_servers));
}
/*
* smb_server_g_init
*
* This function must be called from smb_drv_attach().
*/
int
smb_server_g_init(void)
{
int rc;
if ((rc = smb_vop_init()) != 0)
goto errout;
if ((rc = smb_fem_init()) != 0)
goto errout;
smb_kshare_g_init();
smb_codepage_init();
smb_mbc_init(); /* smb_mbc_cache */
smb_node_init(); /* smb_node_cache, lists */
smb2_lease_init();
smb_cache_request = kmem_cache_create("smb_request_cache",
sizeof (smb_request_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_session = kmem_cache_create("smb_session_cache",
sizeof (smb_session_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_user = kmem_cache_create("smb_user_cache",
sizeof (smb_user_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_tree = kmem_cache_create("smb_tree_cache",
sizeof (smb_tree_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_ofile = kmem_cache_create("smb_ofile_cache",
sizeof (smb_ofile_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_odir = kmem_cache_create("smb_odir_cache",
sizeof (smb_odir_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_opipe = kmem_cache_create("smb_opipe_cache",
sizeof (smb_opipe_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_event = kmem_cache_create("smb_event_cache",
sizeof (smb_event_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_cache_lock = kmem_cache_create("smb_lock_cache",
sizeof (smb_lock_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
smb_llist_init();
smb_llist_constructor(&smb_servers, sizeof (smb_server_t),
offsetof(smb_server_t, sv_lnd));
smb_llist_constructor(&smb_server_session_zombies,
sizeof (smb_session_t), offsetof(smb_session_t, s_lnd));
return (0);
errout:
smb_fem_fini();
smb_vop_fini();
return (rc);
}
/*
* smb_server_g_fini
*
* This function must called from smb_drv_detach(). It will fail if servers
* still exist.
*/
void
smb_server_g_fini(void)
{
ASSERT(smb_llist_get_count(&smb_servers) == 0);
smb_llist_fini();
kmem_cache_destroy(smb_cache_request);
kmem_cache_destroy(smb_cache_session);
kmem_cache_destroy(smb_cache_user);
kmem_cache_destroy(smb_cache_tree);
kmem_cache_destroy(smb_cache_ofile);
kmem_cache_destroy(smb_cache_odir);
kmem_cache_destroy(smb_cache_opipe);
kmem_cache_destroy(smb_cache_event);
kmem_cache_destroy(smb_cache_lock);
smb2_lease_fini();
smb_node_fini();
smb_mbc_fini();
smb_codepage_fini();
smb_kshare_g_fini();
smb_fem_fini();
smb_vop_fini();
smb_llist_destructor(&smb_servers);
}
/*
* smb_server_create
*
* This function will fail if there's already a server associated with the
* caller's zone.
*/
int
smb_server_create(void)
{
zoneid_t zid;
smb_server_t *sv;
zid = getzoneid();
smb_llist_enter(&smb_servers, RW_WRITER);
sv = smb_llist_head(&smb_servers);
while (sv) {
SMB_SERVER_VALID(sv);
if (sv->sv_zid == zid) {
smb_llist_exit(&smb_servers);
return (EPERM);
}
sv = smb_llist_next(&smb_servers, sv);
}
sv = kmem_zalloc(sizeof (smb_server_t), KM_SLEEP);
sv->sv_magic = SMB_SERVER_MAGIC;
sv->sv_state = SMB_SERVER_STATE_CREATED;
sv->sv_zid = zid;
sv->sv_pid = ddi_get_pid();
mutex_init(&sv->sv_mutex, NULL, MUTEX_DEFAULT, NULL);
cv_init(&sv->sv_cv, NULL, CV_DEFAULT, NULL);
cv_init(&sv->sp_info.sp_cv, NULL, CV_DEFAULT, NULL);
sv->sv_persistid_ht = smb_hash_create(sizeof (smb_ofile_t),
offsetof(smb_ofile_t, f_dh_lnd), SMB_OFILE_HASH_NBUCKETS);
sv->sv_lease_ht = smb_hash_create(sizeof (smb_lease_t),
offsetof(smb_lease_t, ls_lnd), SMB_LEASE_HASH_NBUCKETS);
smb_llist_constructor(&sv->sv_session_list, sizeof (smb_session_t),
offsetof(smb_session_t, s_lnd));
smb_llist_constructor(&sv->sv_event_list, sizeof (smb_event_t),
offsetof(smb_event_t, se_lnd));
smb_llist_constructor(&sv->sp_info.sp_list, sizeof (smb_kspooldoc_t),
offsetof(smb_kspooldoc_t, sd_lnd));
smb_llist_constructor(&sv->sp_info.sp_fidlist,
sizeof (smb_spoolfid_t), offsetof(smb_spoolfid_t, sf_lnd));
sv->sv_disp_stats1 = kmem_zalloc(SMB_COM_NUM *
sizeof (smb_disp_stats_t), KM_SLEEP);
sv->sv_disp_stats2 = kmem_zalloc(SMB2__NCMDS *
sizeof (smb_disp_stats_t), KM_SLEEP);
smb_thread_init(&sv->si_thread_timers, "smb_timers",
smb_server_timers, sv, smbsrv_timer_pri);
smb_srqueue_init(&sv->sv_srqueue);
smb_kdoor_init(sv);
smb_kshare_init(sv);
smb_server_kstat_init(sv);
smb_threshold_init(&sv->sv_ssetup_ct, SMB_SSETUP_CMD,
smb_ssetup_threshold, smb_ssetup_timeout);
smb_threshold_init(&sv->sv_tcon_ct, SMB_TCON_CMD,
smb_tcon_threshold, smb_tcon_timeout);
smb_threshold_init(&sv->sv_opipe_ct, SMB_OPIPE_CMD,
smb_opipe_threshold, smb_opipe_timeout);
smb_llist_insert_tail(&smb_servers, sv);
smb_llist_exit(&smb_servers);
return (0);
}
/*
* smb_server_delete
*
* This function will delete the server passed in. It will make sure that all
* activity associated that server has ceased before destroying it.
*/
int
smb_server_delete(smb_server_t *sv)
{
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_RUNNING:
sv->sv_state = SMB_SERVER_STATE_STOPPING;
mutex_exit(&sv->sv_mutex);
smb_server_shutdown(sv);
mutex_enter(&sv->sv_mutex);
cv_broadcast(&sv->sp_info.sp_cv);
sv->sv_state = SMB_SERVER_STATE_DELETING;
break;
case SMB_SERVER_STATE_STOPPING:
sv->sv_state = SMB_SERVER_STATE_DELETING;
break;
case SMB_SERVER_STATE_CONFIGURED:
case SMB_SERVER_STATE_CREATED:
sv->sv_state = SMB_SERVER_STATE_DELETING;
break;
default:
SMB_SERVER_STATE_VALID(sv->sv_state);
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
return (ENOTTY);
}
ASSERT(sv->sv_state == SMB_SERVER_STATE_DELETING);
sv->sv_refcnt--;
while (sv->sv_refcnt)
cv_wait(&sv->sv_cv, &sv->sv_mutex);
mutex_exit(&sv->sv_mutex);
smb_llist_enter(&smb_servers, RW_WRITER);
smb_llist_remove(&smb_servers, sv);
smb_llist_exit(&smb_servers);
smb_threshold_fini(&sv->sv_ssetup_ct);
smb_threshold_fini(&sv->sv_tcon_ct);
smb_threshold_fini(&sv->sv_opipe_ct);
smb_server_listener_destroy(&sv->sv_nbt_daemon);
smb_server_listener_destroy(&sv->sv_tcp_daemon);
rw_destroy(&sv->sv_cfg_lock);
smb_server_kstat_fini(sv);
smb_kshare_fini(sv);
smb_kdoor_fini(sv);
smb_llist_destructor(&sv->sv_event_list);
smb_llist_destructor(&sv->sv_session_list);
kmem_free(sv->sv_disp_stats1,
SMB_COM_NUM * sizeof (smb_disp_stats_t));
kmem_free(sv->sv_disp_stats2,
SMB2__NCMDS * sizeof (smb_disp_stats_t));
smb_srqueue_destroy(&sv->sv_srqueue);
smb_thread_destroy(&sv->si_thread_timers);
mutex_destroy(&sv->sv_mutex);
smb_hash_destroy(sv->sv_lease_ht);
smb_hash_destroy(sv->sv_persistid_ht);
cv_destroy(&sv->sv_cv);
sv->sv_magic = 0;
kmem_free(sv, sizeof (smb_server_t));
return (0);
}
/*
* smb_server_configure
*/
int
smb_server_configure(smb_ioc_cfg_t *ioc)
{
int rc = 0;
smb_server_t *sv;
/*
* Reality check negotiation token length vs. #define'd maximum.
*/
if (ioc->negtok_len > SMB_PI_MAX_NEGTOK)
return (EINVAL);
rc = smb_server_lookup(&sv);
if (rc)
return (rc);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_CREATED:
smb_server_store_cfg(sv, ioc);
sv->sv_state = SMB_SERVER_STATE_CONFIGURED;
break;
case SMB_SERVER_STATE_CONFIGURED:
smb_server_store_cfg(sv, ioc);
break;
case SMB_SERVER_STATE_RUNNING:
case SMB_SERVER_STATE_STOPPING:
rw_enter(&sv->sv_cfg_lock, RW_WRITER);
smb_server_store_cfg(sv, ioc);
rw_exit(&sv->sv_cfg_lock);
break;
default:
SMB_SERVER_STATE_VALID(sv->sv_state);
rc = EFAULT;
break;
}
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
return (rc);
}
/*
* smb_server_start
*/
int
smb_server_start(smb_ioc_start_t *ioc)
{
int rc = 0;
int family;
smb_server_t *sv;
cred_t *ucr;
rc = smb_server_lookup(&sv);
if (rc)
return (rc);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_CONFIGURED:
if ((rc = smb_server_fsop_start(sv)) != 0)
break;
/*
* Note: smb_kshare_start needs sv_session.
*/
sv->sv_session = smb_session_create(NULL, 0, sv, 0);
if (sv->sv_session == NULL) {
rc = ENOMEM;
break;
}
/*
* Create a logon on the server session,
* used when importing CA shares.
*/
sv->sv_rootuser = smb_user_new(sv->sv_session);
ucr = smb_kcred_create();
rc = smb_user_logon(sv->sv_rootuser, ucr, "", "root",
SMB_USER_FLAG_ADMIN, 0, 0);
crfree(ucr);
ucr = NULL;
if (rc != 0) {
cmn_err(CE_NOTE, "smb_server_start: "
"failed to create root user");
break;
}
if ((rc = smb_kshare_start(sv)) != 0)
break;
/*
* NB: the proc passed here has to be a "system" one.
* Normally that's p0, or the NGZ eqivalent.
*/
sv->sv_worker_pool = taskq_create_proc("smb_workers",
sv->sv_cfg.skc_maxworkers, smbsrv_worker_pri,
sv->sv_cfg.skc_maxworkers, INT_MAX,
curzone->zone_zsched, TASKQ_DYNAMIC);
sv->sv_receiver_pool = taskq_create_proc("smb_receivers",
sv->sv_cfg.skc_maxconnections, smbsrv_receive_pri,
sv->sv_cfg.skc_maxconnections, INT_MAX,
curzone->zone_zsched, TASKQ_DYNAMIC);
if (sv->sv_worker_pool == NULL ||
sv->sv_receiver_pool == NULL) {
rc = ENOMEM;
break;
}
#ifdef _KERNEL
ASSERT(sv->sv_lmshrd == NULL);
sv->sv_lmshrd = smb_kshare_door_init(ioc->lmshrd);
if (sv->sv_lmshrd == NULL)
break;
if ((rc = smb_kdoor_open(sv, ioc->udoor)) != 0) {
cmn_err(CE_WARN, "Cannot open smbd door");
break;
}
#else /* _KERNEL */
/* Fake kernel does not use the kshare_door */
fksmb_kdoor_open(sv, ioc->udoor_func);
#endif /* _KERNEL */
if ((rc = smb_thread_start(&sv->si_thread_timers)) != 0)
break;
family = AF_INET;
smb_server_listener_init(sv, &sv->sv_nbt_daemon,
"smb_nbt_listener", IPPORT_NETBIOS_SSN, family);
if (sv->sv_cfg.skc_ipv6_enable)
family = AF_INET6;
smb_server_listener_init(sv, &sv->sv_tcp_daemon,
"smb_tcp_listener", IPPORT_SMB, family);
rc = smb_server_listener_start(&sv->sv_tcp_daemon);
if (rc != 0)
break;
if (sv->sv_cfg.skc_netbios_enable)
(void) smb_server_listener_start(&sv->sv_nbt_daemon);
sv->sv_state = SMB_SERVER_STATE_RUNNING;
sv->sv_start_time = gethrtime();
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
smb_export_start(sv);
return (0);
default:
SMB_SERVER_STATE_VALID(sv->sv_state);
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
return (ENOTTY);
}
mutex_exit(&sv->sv_mutex);
smb_server_shutdown(sv);
smb_server_release(sv);
return (rc);
}
/*
* An smbd is shutting down.
*/
int
smb_server_stop(void)
{
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)) != 0)
return (rc);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_RUNNING:
sv->sv_state = SMB_SERVER_STATE_STOPPING;
mutex_exit(&sv->sv_mutex);
smb_server_shutdown(sv);
mutex_enter(&sv->sv_mutex);
cv_broadcast(&sv->sp_info.sp_cv);
break;
default:
SMB_SERVER_STATE_VALID(sv->sv_state);
break;
}
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
return (0);
}
boolean_t
smb_server_is_stopping(smb_server_t *sv)
{
boolean_t status;
SMB_SERVER_VALID(sv);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_STOPPING:
case SMB_SERVER_STATE_DELETING:
status = B_TRUE;
break;
default:
status = B_FALSE;
break;
}
mutex_exit(&sv->sv_mutex);
return (status);
}
void
smb_server_cancel_event(smb_server_t *sv, uint32_t txid)
{
smb_event_cancel(sv, txid);
}
int
smb_server_notify_event(smb_ioc_event_t *ioc)
{
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)) == 0) {
smb_event_notify(sv, ioc->txid);
smb_server_release(sv);
}
return (rc);
}
/*
* smb_server_spooldoc
*
* Waits for print file close broadcast.
* Gets the head of the fid list,
* then searches the spooldoc list and returns
* this info via the ioctl to user land.
*
* rc - 0 success
*/
int
smb_server_spooldoc(smb_ioc_spooldoc_t *ioc)
{
smb_server_t *sv;
int rc;
smb_kspooldoc_t *spdoc;
uint16_t fid;
if ((rc = smb_server_lookup(&sv)) != 0)
return (rc);
if (sv->sv_cfg.skc_print_enable == 0) {
rc = ENOTTY;
goto out;
}
mutex_enter(&sv->sv_mutex);
for (;;) {
if (sv->sv_state != SMB_SERVER_STATE_RUNNING) {
rc = ECANCELED;
break;
}
if ((fid = smb_spool_get_fid(sv)) != 0) {
rc = 0;
break;
}
if (cv_wait_sig(&sv->sp_info.sp_cv, &sv->sv_mutex) == 0) {
rc = EINTR;
break;
}
}
mutex_exit(&sv->sv_mutex);
if (rc != 0)
goto out;
spdoc = kmem_zalloc(sizeof (*spdoc), KM_SLEEP);
if (smb_spool_lookup_doc_byfid(sv, fid, spdoc)) {
ioc->spool_num = spdoc->sd_spool_num;
ioc->ipaddr = spdoc->sd_ipaddr;
(void) strlcpy(ioc->path, spdoc->sd_path,
MAXPATHLEN);
(void) strlcpy(ioc->username,
spdoc->sd_username, MAXNAMELEN);
} else {
/* Did not find that print job. */
rc = EAGAIN;
}
kmem_free(spdoc, sizeof (*spdoc));
out:
smb_server_release(sv);
return (rc);
}
int
smb_server_set_gmtoff(smb_ioc_gmt_t *ioc)
{
int rc;
smb_server_t *sv;
if ((rc = smb_server_lookup(&sv)) == 0) {
sv->si_gmtoff = ioc->offset;
smb_server_release(sv);
}
return (rc);
}
int
smb_server_numopen(smb_ioc_opennum_t *ioc)
{
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)) == 0) {
ioc->open_users = sv->sv_users;
ioc->open_trees = sv->sv_trees;
ioc->open_files = sv->sv_files + sv->sv_pipes;
smb_server_release(sv);
}
return (rc);
}
/*
* Enumerate objects within the server. The svcenum provides the
* enumeration context, i.e. what the caller want to get back.
*/
int
smb_server_enum(smb_ioc_svcenum_t *ioc)
{
smb_svcenum_t *svcenum = &ioc->svcenum;
smb_server_t *sv;
int rc;
/*
* Reality check that the buffer-length insize the enum doesn't
* overrun the ioctl's total length.
*/
if (svcenum->se_buflen + sizeof (*ioc) > ioc->hdr.len)
return (EINVAL);
if ((rc = smb_server_lookup(&sv)) != 0)
return (rc);
svcenum->se_bavail = svcenum->se_buflen;
svcenum->se_bused = 0;
svcenum->se_nitems = 0;
switch (svcenum->se_type) {
case SMB_SVCENUM_TYPE_USER:
smb_server_enum_users(sv, svcenum);
break;
case SMB_SVCENUM_TYPE_TREE:
case SMB_SVCENUM_TYPE_FILE:
smb_server_enum_trees(sv, svcenum);
break;
default:
rc = EINVAL;
}
smb_server_release(sv);
return (rc);
}
/*
* Look for sessions to disconnect by client and user name.
*/
int
smb_server_session_close(smb_ioc_session_t *ioc)
{
smb_server_t *sv;
int cnt;
int rc;
if ((rc = smb_server_lookup(&sv)) != 0)
return (rc);
cnt = smb_server_session_disconnect(sv, ioc->client, ioc->username);
smb_server_release(sv);
if (cnt == 0)
return (ENOENT);
return (0);
}
/*
* Close a file by uniqid.
*/
int
smb_server_file_close(smb_ioc_fileid_t *ioc)
{
uint32_t uniqid = ioc->uniqid;
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)) != 0)
return (rc);
rc = smb_server_fclose(sv, uniqid);
smb_server_release(sv);
return (rc);
}
/*
* These functions determine the relevant smb server to which the call apply.
*/
uint32_t
smb_server_get_session_count(smb_server_t *sv)
{
uint32_t counter = 0;
counter = smb_llist_get_count(&sv->sv_session_list);
return (counter);
}
/*
* Gets the smb_node of the specified share path.
* Node is returned held (caller must rele.)
*/
int
smb_server_share_lookup(smb_server_t *sv, const char *shr_path,
smb_node_t **nodepp)
{
smb_request_t *sr;
smb_node_t *fnode = NULL;
smb_node_t *dnode = NULL;
char last_comp[MAXNAMELEN];
int rc = 0;
ASSERT(shr_path);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_RUNNING:
break;
default:
mutex_exit(&sv->sv_mutex);
return (ENOTACTIVE);
}
mutex_exit(&sv->sv_mutex);
if ((sr = smb_request_alloc(sv->sv_session, 0)) == NULL) {
return (ENOTCONN);
}
sr->user_cr = zone_kcred();
rc = smb_pathname_reduce(sr, sr->user_cr, shr_path,
NULL, NULL, &dnode, last_comp);
if (rc == 0) {
rc = smb_fsop_lookup(sr, sr->user_cr, SMB_FOLLOW_LINKS,
sv->si_root_smb_node, dnode, last_comp, &fnode);
smb_node_release(dnode);
}
smb_request_free(sr);
if (rc != 0)
return (rc);
ASSERT(fnode->vp && fnode->vp->v_vfsp);
*nodepp = fnode;
return (0);
}
#ifdef _KERNEL
/*
* This is a special interface that will be utilized by ZFS to cause a share to
* be added/removed.
*
* arg is either a lmshare_info_t or share_name from userspace.
* It will need to be copied into the kernel. It is lmshare_info_t
* for add operations and share_name for delete operations.
*/
int
smb_server_share(void *arg, boolean_t add_share)
{
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)) == 0) {
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_RUNNING:
mutex_exit(&sv->sv_mutex);
(void) smb_kshare_upcall(sv->sv_lmshrd, arg, add_share);
break;
default:
mutex_exit(&sv->sv_mutex);
break;
}
smb_server_release(sv);
}
return (rc);
}
#endif /* _KERNEL */
int
smb_server_unshare(const char *sharename)
{
smb_server_t *sv;
int rc;
if ((rc = smb_server_lookup(&sv)))
return (rc);
mutex_enter(&sv->sv_mutex);
switch (sv->sv_state) {
case SMB_SERVER_STATE_RUNNING:
case SMB_SERVER_STATE_STOPPING:
break;
default:
mutex_exit(&sv->sv_mutex);
smb_server_release(sv);
return (ENOTACTIVE);
}
mutex_exit(&sv->sv_mutex);
smb_server_disconnect_share(sv, sharename);
smb_server_release(sv);
return (0);
}
/*
* Disconnect the specified share.
* Typically called when a share has been removed.
*/
static void
smb_server_disconnect_share(smb_server_t *sv, const char *sharename)
{
smb_llist_t *ll;
smb_session_t *session;
ll = &sv->sv_session_list;
smb_llist_enter(ll, RW_READER);
session = smb_llist_head(ll);
while (session) {
SMB_SESSION_VALID(session);
smb_rwx_rwenter(&session->s_lock, RW_READER);
switch (session->s_state) {
case SMB_SESSION_STATE_NEGOTIATED:
smb_rwx_rwexit(&session->s_lock);
smb_session_disconnect_share(session, sharename);
break;
default:
smb_rwx_rwexit(&session->s_lock);
break;
}
session = smb_llist_next(ll, session);
}
smb_llist_exit(ll);
}
/*
* *****************************************************************************
* **************** Functions called from the internal layers ******************
* *****************************************************************************
*
* These functions are provided the relevant smb server by the caller.
*/
void
smb_server_get_cfg(smb_server_t *sv, smb_kmod_cfg_t *cfg)
{
rw_enter(&sv->sv_cfg_lock, RW_READER);
bcopy(&sv->sv_cfg, cfg, sizeof (*cfg));
rw_exit(&sv->sv_cfg_lock);
}
/*
*
*/
void
smb_server_inc_nbt_sess(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_nbt_sess);
}
void
smb_server_dec_nbt_sess(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_nbt_sess);
}
void
smb_server_inc_tcp_sess(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_tcp_sess);
}
void
smb_server_dec_tcp_sess(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_tcp_sess);
}
void
smb_server_inc_users(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_users);
}
void
smb_server_dec_users(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_users);
}
void
smb_server_inc_trees(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_trees);
}
void
smb_server_dec_trees(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_trees);
}
void
smb_server_inc_files(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_files);
}
void
smb_server_dec_files(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_files);
}
void
smb_server_inc_pipes(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_32(&sv->sv_pipes);
}
void
smb_server_dec_pipes(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_dec_32(&sv->sv_pipes);
}
void
smb_server_add_rxb(smb_server_t *sv, int64_t value)
{
SMB_SERVER_VALID(sv);
atomic_add_64(&sv->sv_rxb, value);
}
void
smb_server_add_txb(smb_server_t *sv, int64_t value)
{
SMB_SERVER_VALID(sv);
atomic_add_64(&sv->sv_txb, value);
}
void
smb_server_inc_req(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
atomic_inc_64(&sv->sv_nreq);
}
/*
* *****************************************************************************
* *************************** Static Functions ********************************
* *****************************************************************************
*/
static void
smb_server_timers(smb_thread_t *thread, void *arg)
{
smb_server_t *sv = (smb_server_t *)arg;
ASSERT(sv != NULL);
/*
* This kills old inactive sessions and expired durable
* handles. The session code expects one call per minute.
*/
while (smb_thread_continue_timedwait(thread, 60 /* Seconds */)) {
if (sv->sv_cfg.skc_keepalive != 0)
smb_session_timers(sv);
smb2_durable_timers(sv);
}
}
/*
* smb_server_kstat_init
*/
static void
smb_server_kstat_init(smb_server_t *sv)
{
sv->sv_ksp = kstat_create_zone(SMBSRV_KSTAT_MODULE, 0,
SMBSRV_KSTAT_STATISTICS, SMBSRV_KSTAT_CLASS, KSTAT_TYPE_RAW,
sizeof (smbsrv_kstats_t), 0, sv->sv_zid);
if (sv->sv_ksp != NULL) {
sv->sv_ksp->ks_update = smb_server_kstat_update;
sv->sv_ksp->ks_private = sv;
((smbsrv_kstats_t *)sv->sv_ksp->ks_data)->ks_start_time =
sv->sv_start_time;
smb_dispatch_stats_init(sv);
smb2_dispatch_stats_init(sv);
kstat_install(sv->sv_ksp);
} else {
cmn_err(CE_WARN, "SMB Server: Statistics unavailable");
}
sv->sv_legacy_ksp = kstat_create_zone(SMBSRV_KSTAT_MODULE, 0,
SMBSRV_KSTAT_NAME, SMBSRV_KSTAT_CLASS, KSTAT_TYPE_NAMED,
sizeof (smb_server_legacy_kstat_t) / sizeof (kstat_named_t),
0, sv->sv_zid);
if (sv->sv_legacy_ksp != NULL) {
smb_server_legacy_kstat_t *ksd;
ksd = sv->sv_legacy_ksp->ks_data;
(void) strlcpy(ksd->ls_files.name, "open_files",
sizeof (ksd->ls_files.name));
ksd->ls_files.data_type = KSTAT_DATA_UINT32;
(void) strlcpy(ksd->ls_trees.name, "connections",
sizeof (ksd->ls_trees.name));
ksd->ls_trees.data_type = KSTAT_DATA_UINT32;
(void) strlcpy(ksd->ls_users.name, "connections",
sizeof (ksd->ls_users.name));
ksd->ls_users.data_type = KSTAT_DATA_UINT32;
mutex_init(&sv->sv_legacy_ksmtx, NULL, MUTEX_DEFAULT, NULL);
sv->sv_legacy_ksp->ks_lock = &sv->sv_legacy_ksmtx;
sv->sv_legacy_ksp->ks_update = smb_server_legacy_kstat_update;
kstat_install(sv->sv_legacy_ksp);
}
}
/*
* smb_server_kstat_fini
*/
static void
smb_server_kstat_fini(smb_server_t *sv)
{
if (sv->sv_legacy_ksp != NULL) {
kstat_delete(sv->sv_legacy_ksp);
mutex_destroy(&sv->sv_legacy_ksmtx);
sv->sv_legacy_ksp = NULL;
}
if (sv->sv_ksp != NULL) {
kstat_delete(sv->sv_ksp);
sv->sv_ksp = NULL;
smb_dispatch_stats_fini(sv);
smb2_dispatch_stats_fini(sv);
}
}
/*
* smb_server_kstat_update
*/
static int
smb_server_kstat_update(kstat_t *ksp, int rw)
{
smb_server_t *sv;
smbsrv_kstats_t *ksd;
if (rw == KSTAT_READ) {
sv = ksp->ks_private;
SMB_SERVER_VALID(sv);
ksd = (smbsrv_kstats_t *)ksp->ks_data;
/*
* Counters
*/
ksd->ks_nbt_sess = sv->sv_nbt_sess;
ksd->ks_tcp_sess = sv->sv_tcp_sess;
ksd->ks_users = sv->sv_users;
ksd->ks_trees = sv->sv_trees;
ksd->ks_files = sv->sv_files;
ksd->ks_pipes = sv->sv_pipes;
/*
* Throughput
*/
ksd->ks_txb = sv->sv_txb;
ksd->ks_rxb = sv->sv_rxb;
ksd->ks_nreq = sv->sv_nreq;
/*
* Busyness
*/
ksd->ks_maxreqs = sv->sv_cfg.skc_maxworkers;
smb_srqueue_update(&sv->sv_srqueue,
&ksd->ks_utilization);
/*
* Latency & Throughput of the requests
*/
smb_dispatch_stats_update(sv, ksd->ks_reqs1, 0, SMB_COM_NUM);
smb2_dispatch_stats_update(sv, ksd->ks_reqs2, 0, SMB2__NCMDS);
return (0);
}
if (rw == KSTAT_WRITE)
return (EACCES);
return (EIO);
}
static int
smb_server_legacy_kstat_update(kstat_t *ksp, int rw)
{
smb_server_t *sv;
smb_server_legacy_kstat_t *ksd;
int rc;
switch (rw) {
case KSTAT_WRITE:
rc = EACCES;
break;
case KSTAT_READ:
if (!smb_server_lookup(&sv)) {
ASSERT(MUTEX_HELD(ksp->ks_lock));
ASSERT(sv->sv_legacy_ksp == ksp);
ksd = (smb_server_legacy_kstat_t *)ksp->ks_data;
ksd->ls_files.value.ui32 = sv->sv_files + sv->sv_pipes;
ksd->ls_trees.value.ui32 = sv->sv_trees;
ksd->ls_users.value.ui32 = sv->sv_users;
smb_server_release(sv);
rc = 0;
break;
}
/* FALLTHROUGH */
default:
rc = EIO;
break;
}
return (rc);
}
/*
* smb_server_shutdown
*/
static void
smb_server_shutdown(smb_server_t *sv)
{
smb_llist_t *sl = &sv->sv_session_list;
smb_session_t *session;
clock_t time;
SMB_SERVER_VALID(sv);
/*
* Stop the listeners first, so we don't get any more
* new work while we're trying to shut down.
*/
smb_server_listener_stop(&sv->sv_nbt_daemon);
smb_server_listener_stop(&sv->sv_tcp_daemon);
smb_thread_stop(&sv->si_thread_timers);
/* Disconnect all of the sessions */
smb_llist_enter(sl, RW_READER);
session = smb_llist_head(sl);
while (session != NULL) {
smb_session_disconnect(session);
session = smb_llist_next(sl, session);
}
smb_llist_exit(sl);
/*
* Wake up any threads we might have blocked.
* Must precede kdoor_close etc. because those will
* wait for such threads to get out.
*/
smb_event_cancel(sv, 0);
smb_threshold_wake_all(&sv->sv_ssetup_ct);
smb_threshold_wake_all(&sv->sv_tcon_ct);
smb_threshold_wake_all(&sv->sv_opipe_ct);
/*
* Wait for the session list to empty.
* (cv_signal in smb_server_destroy_session)
*
* This should not take long, but if there are any leaked
* references to ofiles, trees, or users, there could be a
* session hanging around. If that happens, the ll_count
* never gets to zero and we'll never get the sv_signal.
* Defend against that problem using timed wait, then
* complain if we find sessions left over and continue
* with shutdown in spite of any leaked sessions.
* That's better than a server that won't reboot.
*/
time = SEC_TO_TICK(5) + ddi_get_lbolt();
mutex_enter(&sv->sv_mutex);
while (sv->sv_session_list.ll_count != 0) {
if (cv_timedwait(&sv->sv_cv, &sv->sv_mutex, time) < 0)
break;
}
mutex_exit(&sv->sv_mutex);
#ifdef DEBUG
if (sv->sv_session_list.ll_count != 0) {
cmn_err(CE_NOTE, "shutdown leaked sessions");
debug_enter("shutdown leaked sessions");
}
#endif
/*
* Clean out any durable handles. After this we should
* have no ofiles remaining (and no more oplock breaks).
*/
smb2_dh_shutdown(sv);
smb_kdoor_close(sv);
#ifdef _KERNEL
smb_kshare_door_fini(sv->sv_lmshrd);
#endif /* _KERNEL */
sv->sv_lmshrd = NULL;
smb_export_stop(sv);
smb_kshare_stop(sv);
/*
* Both kshare and the oplock break sub-systems may have
* taskq jobs on the spcial "server" session, until we've
* closed all ofiles and stopped the kshare exporter.
* Now it's safe to destroy the server session, but first
* wait for any requests on it to finish. Note that for
* normal sessions, this happens in smb_session_cancel,
* but that's not called for the server session.
*/
if (sv->sv_rootuser != NULL) {
smb_user_logoff(sv->sv_rootuser);
smb_user_release(sv->sv_rootuser);
sv->sv_rootuser = NULL;
}
if (sv->sv_session != NULL) {
smb_session_cancel_requests(sv->sv_session, NULL, NULL);
smb_slist_wait_for_empty(&sv->sv_session->s_req_list);
/* Just in case import left users and trees */
smb_session_logoff(sv->sv_session);
smb_session_delete(sv->sv_session);
sv->sv_session = NULL;
}
if (sv->sv_receiver_pool != NULL) {
taskq_destroy(sv->sv_receiver_pool);
sv->sv_receiver_pool = NULL;
}
if (sv->sv_worker_pool != NULL) {
taskq_destroy(sv->sv_worker_pool);
sv->sv_worker_pool = NULL;
}
smb_server_fsop_stop(sv);
}
/*
* smb_server_listener_init
*
* Initializes listener contexts.
*/
static void
smb_server_listener_init(
smb_server_t *sv,
smb_listener_daemon_t *ld,
char *name,
in_port_t port,
int family)
{
ASSERT(ld->ld_magic != SMB_LISTENER_MAGIC);
bzero(ld, sizeof (*ld));
ld->ld_sv = sv;
ld->ld_family = family;
ld->ld_port = port;
if (family == AF_INET) {
ld->ld_sin.sin_family = (uint32_t)family;
ld->ld_sin.sin_port = htons(port);
ld->ld_sin.sin_addr.s_addr = htonl(INADDR_ANY);
} else {
ld->ld_sin6.sin6_family = (uint32_t)family;
ld->ld_sin6.sin6_port = htons(port);
(void) memset(&ld->ld_sin6.sin6_addr.s6_addr, 0,
sizeof (ld->ld_sin6.sin6_addr.s6_addr));
}
smb_thread_init(&ld->ld_thread, name, smb_server_listener, ld,
smbsrv_listen_pri);
ld->ld_magic = SMB_LISTENER_MAGIC;
}
/*
* smb_server_listener_destroy
*
* Destroyes listener contexts.
*/
static void
smb_server_listener_destroy(smb_listener_daemon_t *ld)
{
/*
* Note that if startup fails early, we can legitimately
* get here with an all-zeros object.
*/
if (ld->ld_magic == 0)
return;
SMB_LISTENER_VALID(ld);
ASSERT(ld->ld_so == NULL);
smb_thread_destroy(&ld->ld_thread);
ld->ld_magic = 0;
}
/*
* smb_server_listener_start
*
* Starts the listener associated with the context passed in.
*
* Return: 0 Success
* not 0 Failure
*/
static int
smb_server_listener_start(smb_listener_daemon_t *ld)
{
int rc;
uint32_t on;
uint32_t off;
SMB_LISTENER_VALID(ld);
if (ld->ld_so != NULL)
return (EINVAL);
ld->ld_so = smb_socreate(ld->ld_family, SOCK_STREAM, 0);
if (ld->ld_so == NULL) {
cmn_err(CE_WARN, "port %d: socket create failed", ld->ld_port);
return (ENOMEM);
}
off = 0;
(void) ksocket_setsockopt(ld->ld_so, SOL_SOCKET,
SO_MAC_EXEMPT, &off, sizeof (off), CRED());
on = 1;
(void) ksocket_setsockopt(ld->ld_so, SOL_SOCKET,
SO_REUSEADDR, &on, sizeof (on), CRED());
if (ld->ld_family == AF_INET) {
rc = ksocket_bind(ld->ld_so,
(struct sockaddr *)&ld->ld_sin,
sizeof (ld->ld_sin), CRED());
} else {
rc = ksocket_bind(ld->ld_so,
(struct sockaddr *)&ld->ld_sin6,
sizeof (ld->ld_sin6), CRED());
}
if (rc != 0) {
cmn_err(CE_WARN, "port %d: bind failed", ld->ld_port);
return (rc);
}
rc = ksocket_listen(ld->ld_so, 20, CRED());
if (rc < 0) {
cmn_err(CE_WARN, "port %d: listen failed", ld->ld_port);
return (rc);
}
ksocket_hold(ld->ld_so);
rc = smb_thread_start(&ld->ld_thread);
if (rc != 0) {
ksocket_rele(ld->ld_so);
cmn_err(CE_WARN, "port %d: listener failed to start",
ld->ld_port);
return (rc);
}
return (0);
}
/*
* smb_server_listener_stop
*
* Stops the listener associated with the context passed in.
*/
static void
smb_server_listener_stop(smb_listener_daemon_t *ld)
{
SMB_LISTENER_VALID(ld);
if (ld->ld_so != NULL) {
smb_soshutdown(ld->ld_so);
smb_sodestroy(ld->ld_so);
smb_thread_stop(&ld->ld_thread);
ld->ld_so = NULL;
}
}
/*
* smb_server_listener
*
* Entry point of the listeners.
*/
static void
smb_server_listener(smb_thread_t *thread, void *arg)
{
_NOTE(ARGUNUSED(thread))
smb_listener_daemon_t *ld;
ksocket_t s_so;
int on;
int txbuf_size;
ld = (smb_listener_daemon_t *)arg;
SMB_LISTENER_VALID(ld);
DTRACE_PROBE1(so__wait__accept, struct sonode *, ld->ld_so);
for (;;) {
int ret = ksocket_accept(ld->ld_so, NULL, NULL, &s_so, CRED());
switch (ret) {
case 0:
break;
case ECONNABORTED:
continue;
case EINTR:
case EBADF: /* libfakekernel */
goto out;
default:
cmn_err(CE_WARN,
"smb_server_listener: ksocket_accept(%d)",
ret);
goto out;
}
DTRACE_PROBE1(so__accept, struct sonode *, s_so);
on = 1;
(void) ksocket_setsockopt(s_so, IPPROTO_TCP, TCP_NODELAY,
&on, sizeof (on), CRED());
on = 1;
(void) ksocket_setsockopt(s_so, SOL_SOCKET, SO_KEEPALIVE,
&on, sizeof (on), CRED());
txbuf_size = 128*1024;
(void) ksocket_setsockopt(s_so, SOL_SOCKET, SO_SNDBUF,
(const void *)&txbuf_size, sizeof (txbuf_size), CRED());
/*
* Create a session for this connection.
*/
smb_server_create_session(ld, s_so);
}
out:
ksocket_rele(ld->ld_so);
}
/*
* smb_server_receiver
*
* Entry point of the receiver threads.
* Also does cleanup when socket disconnected.
*/
static void
smb_server_receiver(void *arg)
{
smb_session_t *session;
session = (smb_session_t *)arg;
/* We stay in here until socket disconnect. */
smb_session_receiver(session);
smb_server_destroy_session(session);
}
/*
* smb_server_lookup
*
* This function finds the server associated with the zone of the
* caller. Note: requires a fix in the dynamic taskq code:
* 1501 taskq_create_proc ... TQ_DYNAMIC puts tasks in p0
*/
int
smb_server_lookup(smb_server_t **psv)
{
zoneid_t zid;
smb_server_t *sv;
zid = getzoneid();
smb_llist_enter(&smb_servers, RW_READER);
sv = smb_llist_head(&smb_servers);
while (sv) {
SMB_SERVER_VALID(sv);
if (sv->sv_zid == zid) {
mutex_enter(&sv->sv_mutex);
if (sv->sv_state != SMB_SERVER_STATE_DELETING) {
sv->sv_refcnt++;
mutex_exit(&sv->sv_mutex);
smb_llist_exit(&smb_servers);
*psv = sv;
return (0);
}
mutex_exit(&sv->sv_mutex);
break;
}
sv = smb_llist_next(&smb_servers, sv);
}
smb_llist_exit(&smb_servers);
return (EPERM);
}
/*
* smb_server_release
*
* This function decrements the reference count of the server and signals its
* condition variable if the state of the server is SMB_SERVER_STATE_DELETING.
*/
void
smb_server_release(smb_server_t *sv)
{
SMB_SERVER_VALID(sv);
mutex_enter(&sv->sv_mutex);
ASSERT(sv->sv_refcnt);
sv->sv_refcnt--;
if ((sv->sv_refcnt == 0) && (sv->sv_state == SMB_SERVER_STATE_DELETING))
cv_signal(&sv->sv_cv);
mutex_exit(&sv->sv_mutex);
}
/*
* Enumerate the users associated with a session list.
*/
static void
smb_server_enum_users(smb_server_t *sv, smb_svcenum_t *svcenum)
{
smb_llist_t *ll = &sv->sv_session_list;
smb_session_t *sn;
smb_llist_t *ulist;
smb_user_t *user;
int rc = 0;
smb_llist_enter(ll, RW_READER);
sn = smb_llist_head(ll);
while (sn != NULL) {
SMB_SESSION_VALID(sn);
ulist = &sn->s_user_list;
smb_llist_enter(ulist, RW_READER);
user = smb_llist_head(ulist);
while (user != NULL) {
if (smb_user_hold(user)) {
rc = smb_user_enum(user, svcenum);
smb_user_release(user);
if (rc != 0)
break;
}
user = smb_llist_next(ulist, user);
}
smb_llist_exit(ulist);
if (rc != 0)
break;
sn = smb_llist_next(ll, sn);
}
smb_llist_exit(ll);
}
/*
* Enumerate the trees/files associated with a session list.
*/
static void
smb_server_enum_trees(smb_server_t *sv, smb_svcenum_t *svcenum)
{
smb_llist_t *ll = &sv->sv_session_list;
smb_session_t *sn;
smb_llist_t *tlist;
smb_tree_t *tree;
int rc = 0;
smb_llist_enter(ll, RW_READER);
sn = smb_llist_head(ll);
while (sn != NULL) {
SMB_SESSION_VALID(sn);
tlist = &sn->s_tree_list;
smb_llist_enter(tlist, RW_READER);
tree = smb_llist_head(tlist);
while (tree != NULL) {
if (smb_tree_hold(tree)) {
rc = smb_tree_enum(tree, svcenum);
smb_tree_release(tree);
if (rc != 0)
break;
}
tree = smb_llist_next(tlist, tree);
}
smb_llist_exit(tlist);
if (rc != 0)
break;
sn = smb_llist_next(ll, sn);
}
smb_llist_exit(ll);
}
/*
* Disconnect sessions associated with the specified client and username.
* Empty strings are treated as wildcards.
*/
static int
smb_server_session_disconnect(smb_server_t *sv,
const char *client, const char *name)
{
smb_llist_t *ll = &sv->sv_session_list;
smb_session_t *sn;
smb_llist_t *ulist;
smb_user_t *user;
int count = 0;
smb_llist_enter(ll, RW_READER);
for (sn = smb_llist_head(ll);
sn != NULL;
sn = smb_llist_next(ll, sn)) {
SMB_SESSION_VALID(sn);
if (*client != '\0' && !smb_session_isclient(sn, client))
continue;
ulist = &sn->s_user_list;
smb_llist_enter(ulist, RW_READER);
for (user = smb_llist_head(ulist);
user != NULL;
user = smb_llist_next(ulist, user)) {
if (smb_user_hold(user)) {
if (*name == '\0' ||
smb_user_namecmp(user, name)) {
smb_user_logoff(user);
count++;
}
smb_user_release(user);
}
}
smb_llist_exit(ulist);
}
smb_llist_exit(ll);
return (count);
}
/*
* Close a file by its unique id.
*/
static int
smb_server_fclose(smb_server_t *sv, uint32_t uniqid)
{
smb_llist_t *ll;
smb_session_t *sn;
smb_llist_t *tlist;
smb_tree_t *tree;
int rc = ENOENT;
ll = &sv->sv_session_list;
smb_llist_enter(ll, RW_READER);
sn = smb_llist_head(ll);
while ((sn != NULL) && (rc == ENOENT)) {
SMB_SESSION_VALID(sn);
tlist = &sn->s_tree_list;
smb_llist_enter(tlist, RW_READER);
tree = smb_llist_head(tlist);
while ((tree != NULL) && (rc == ENOENT)) {
if (smb_tree_hold(tree)) {
rc = smb_tree_fclose(tree, uniqid);
smb_tree_release(tree);
}
tree = smb_llist_next(tlist, tree);
}
smb_llist_exit(tlist);
sn = smb_llist_next(ll, sn);
}
smb_llist_exit(ll);
return (rc);
}
/*
* This is used by SMB2 session setup to logoff a previous session,
* so it can force a logoff that we haven't noticed yet.
* This is not called frequently, so we just walk the list of
* connections searching for the user.
*
* Note that this must wait for any durable handles (ofiles)
* owned by this user to become "orphaned", so that a reconnect
* that may immediately follow can find and use such ofiles.
*/
void
smb_server_logoff_ssnid(smb_request_t *sr, uint64_t ssnid)
{
smb_server_t *sv = sr->sr_server;
smb_llist_t *sess_list;
smb_session_t *sess;
smb_user_t *user = NULL;
SMB_SERVER_VALID(sv);
if (sv->sv_state != SMB_SERVER_STATE_RUNNING)
return;
sess_list = &sv->sv_session_list;
smb_llist_enter(sess_list, RW_READER);
for (sess = smb_llist_head(sess_list);
sess != NULL;
sess = smb_llist_next(sess_list, sess)) {
SMB_SESSION_VALID(sess);
if (sess->dialect < SMB_VERS_2_BASE)
continue;
switch (sess->s_state) {
case SMB_SESSION_STATE_NEGOTIATED:
case SMB_SESSION_STATE_TERMINATED:
case SMB_SESSION_STATE_DISCONNECTED:
break;
default:
continue;
}
/*
* Normal situation is to find a LOGGED_ON user.
*/
user = smb_session_lookup_uid_st(sess, ssnid, 0,
SMB_USER_STATE_LOGGED_ON);
if (user != NULL) {
if (smb_is_same_user(user->u_cred, sr->user_cr)) {
/* Treat this as if we lost the connection */
user->preserve_opens = SMB2_DH_PRESERVE_SOME;
smb_user_logoff(user);
break;
}
smb_user_release(user);
user = NULL;
}
/*
* If we raced with disconnect, may find LOGGING_OFF,
* in which case we want to just wait for it.
*/
user = smb_session_lookup_uid_st(sess, ssnid, 0,
SMB_USER_STATE_LOGGING_OFF);
if (user != NULL) {
if (smb_is_same_user(user->u_cred, sr->user_cr))
break;
smb_user_release(user);
user = NULL;
}
}
smb_llist_exit(sess_list);
if (user != NULL) {
/*
* Wait for durable handles to be orphaned.
* Note: not holding the sess list rwlock.
*/
smb_user_wait_trees(user);
/*
* Could be doing the last release on a user below,
* which can leave work on the delete queues for
* s_user_list or s_tree_list so flush those.
* Must hold the session list after the user release
* so that the session can't go away while we flush.
*/
smb_llist_enter(sess_list, RW_READER);
sess = user->u_session;
smb_user_release(user);
smb_llist_flush(&sess->s_tree_list);
smb_llist_flush(&sess->s_user_list);
smb_llist_exit(sess_list);
}
}
/* See also: libsmb smb_kmod_setcfg */
static void
smb_server_store_cfg(smb_server_t *sv, smb_ioc_cfg_t *ioc)
{
if (ioc->maxconnections == 0)
ioc->maxconnections = 0xFFFFFFFF;
if (ioc->encrypt == SMB_CONFIG_REQUIRED &&
ioc->max_protocol < SMB_VERS_3_0) {
cmn_err(CE_WARN, "Server set to require encryption; "
"forcing max_protocol to 3.0");
ioc->max_protocol = SMB_VERS_3_0;
}
sv->sv_cfg.skc_maxworkers = ioc->maxworkers;
sv->sv_cfg.skc_maxconnections = ioc->maxconnections;
sv->sv_cfg.skc_keepalive = ioc->keepalive;
sv->sv_cfg.skc_restrict_anon = ioc->restrict_anon;
sv->sv_cfg.skc_signing_enable = ioc->signing_enable;
sv->sv_cfg.skc_signing_required = ioc->signing_required;
sv->sv_cfg.skc_oplock_enable = ioc->oplock_enable;
sv->sv_cfg.skc_sync_enable = ioc->sync_enable;
sv->sv_cfg.skc_secmode = ioc->secmode;
sv->sv_cfg.skc_netbios_enable = ioc->netbios_enable;
sv->sv_cfg.skc_ipv6_enable = ioc->ipv6_enable;
sv->sv_cfg.skc_print_enable = ioc->print_enable;
sv->sv_cfg.skc_traverse_mounts = ioc->traverse_mounts;
sv->sv_cfg.skc_short_names = ioc->short_names;
sv->sv_cfg.skc_max_protocol = ioc->max_protocol;
sv->sv_cfg.skc_min_protocol = ioc->min_protocol;
sv->sv_cfg.skc_encrypt = ioc->encrypt;
sv->sv_cfg.skc_encrypt_cipher = ioc->encrypt_cipher;
sv->sv_cfg.skc_execflags = ioc->exec_flags;
sv->sv_cfg.skc_negtok_len = ioc->negtok_len;
sv->sv_cfg.skc_version = ioc->version;
sv->sv_cfg.skc_initial_credits = ioc->initial_credits;
sv->sv_cfg.skc_maximum_credits = ioc->maximum_credits;
(void) memcpy(sv->sv_cfg.skc_machine_uuid, ioc->machine_uuid,
sizeof (uuid_t));
(void) memcpy(sv->sv_cfg.skc_negtok, ioc->negtok,
sizeof (sv->sv_cfg.skc_negtok));
(void) memcpy(sv->sv_cfg.skc_native_os, ioc->native_os,
sizeof (sv->sv_cfg.skc_native_os));
(void) memcpy(sv->sv_cfg.skc_native_lm, ioc->native_lm,
sizeof (sv->sv_cfg.skc_native_lm));
(void) strlcpy(sv->sv_cfg.skc_nbdomain, ioc->nbdomain,
sizeof (sv->sv_cfg.skc_nbdomain));
(void) strlcpy(sv->sv_cfg.skc_fqdn, ioc->fqdn,
sizeof (sv->sv_cfg.skc_fqdn));
(void) strlcpy(sv->sv_cfg.skc_hostname, ioc->hostname,
sizeof (sv->sv_cfg.skc_hostname));
(void) strlcpy(sv->sv_cfg.skc_system_comment, ioc->system_comment,
sizeof (sv->sv_cfg.skc_system_comment));
}
static int
smb_server_fsop_start(smb_server_t *sv)
{
int error;
error = smb_node_root_init(sv, &sv->si_root_smb_node);
if (error != 0)
sv->si_root_smb_node = NULL;
return (error);
}
static void
smb_server_fsop_stop(smb_server_t *sv)
{
if (sv->si_root_smb_node != NULL) {
smb_node_release(sv->si_root_smb_node);
sv->si_root_smb_node = NULL;
}
}
smb_event_t *
smb_event_create(smb_server_t *sv, int timeout)
{
smb_event_t *event;
if (smb_server_is_stopping(sv))
return (NULL);
event = kmem_cache_alloc(smb_cache_event, KM_SLEEP);
bzero(event, sizeof (smb_event_t));
mutex_init(&event->se_mutex, NULL, MUTEX_DEFAULT, NULL);
cv_init(&event->se_cv, NULL, CV_DEFAULT, NULL);
event->se_magic = SMB_EVENT_MAGIC;
event->se_txid = smb_event_alloc_txid();
event->se_server = sv;
event->se_timeout = timeout;
smb_llist_enter(&sv->sv_event_list, RW_WRITER);
smb_llist_insert_tail(&sv->sv_event_list, event);
smb_llist_exit(&sv->sv_event_list);
return (event);
}
void
smb_event_destroy(smb_event_t *event)
{
smb_server_t *sv;
if (event == NULL)
return;
SMB_EVENT_VALID(event);
ASSERT(event->se_waittime == 0);
sv = event->se_server;
SMB_SERVER_VALID(sv);
smb_llist_enter(&sv->sv_event_list, RW_WRITER);
smb_llist_remove(&sv->sv_event_list, event);
smb_llist_exit(&sv->sv_event_list);
event->se_magic = (uint32_t)~SMB_EVENT_MAGIC;
cv_destroy(&event->se_cv);
mutex_destroy(&event->se_mutex);
kmem_cache_free(smb_cache_event, event);
}
/*
* Get the txid for the specified event.
*/
uint32_t
smb_event_txid(smb_event_t *event)
{
if (event != NULL) {
SMB_EVENT_VALID(event);
return (event->se_txid);
}
cmn_err(CE_NOTE, "smb_event_txid failed");
return ((uint32_t)-1);
}
/*
* Wait for event notification.
*/
int
smb_event_wait(smb_event_t *event)
{
int seconds = 1;
int ticks;
int err;
if (event == NULL)
return (EINVAL);
SMB_EVENT_VALID(event);
mutex_enter(&event->se_mutex);
event->se_waittime = 1;
event->se_errno = 0;
while (!(event->se_notified)) {
if (smb_event_debug && ((event->se_waittime % 30) == 0))
cmn_err(CE_NOTE, "smb_event_wait[%d] (%d sec)",
event->se_txid, event->se_waittime);
if (event->se_errno != 0)
break;
if (event->se_waittime > event->se_timeout) {
event->se_errno = ETIME;
break;
}
ticks = SEC_TO_TICK(seconds);
(void) cv_reltimedwait(&event->se_cv,
&event->se_mutex, (clock_t)ticks, TR_CLOCK_TICK);
++event->se_waittime;
}
err = event->se_errno;
event->se_waittime = 0;
event->se_notified = B_FALSE;
cv_signal(&event->se_cv);
mutex_exit(&event->se_mutex);
return (err);
}
/*
* If txid is non-zero, cancel the specified event.
* Otherwise, cancel all events.
*/
static void
smb_event_cancel(smb_server_t *sv, uint32_t txid)
{
smb_event_t *event;
smb_llist_t *event_list;
SMB_SERVER_VALID(sv);
event_list = &sv->sv_event_list;
smb_llist_enter(event_list, RW_WRITER);
event = smb_llist_head(event_list);
while (event) {
SMB_EVENT_VALID(event);
if (txid == 0 || event->se_txid == txid) {
mutex_enter(&event->se_mutex);
event->se_errno = ECANCELED;
event->se_notified = B_TRUE;
cv_signal(&event->se_cv);
mutex_exit(&event->se_mutex);
if (txid != 0)
break;
}
event = smb_llist_next(event_list, event);
}
smb_llist_exit(event_list);
}
/*
* If txid is non-zero, notify the specified event.
* Otherwise, notify all events.
*/
void
smb_event_notify(smb_server_t *sv, uint32_t txid)
{
smb_event_t *event;
smb_llist_t *event_list;
SMB_SERVER_VALID(sv);
event_list = &sv->sv_event_list;
smb_llist_enter(event_list, RW_READER);
event = smb_llist_head(event_list);
while (event) {
SMB_EVENT_VALID(event);
if (txid == 0 || event->se_txid == txid) {
mutex_enter(&event->se_mutex);
event->se_notified = B_TRUE;
cv_signal(&event->se_cv);
mutex_exit(&event->se_mutex);
if (txid != 0)
break;
}
event = smb_llist_next(event_list, event);
}
smb_llist_exit(event_list);
}
/*
* Allocate a new transaction id (txid).
*
* 0 or -1 are not assigned because they are used to detect invalid
* conditions or to indicate all open id's.
*/
static uint32_t
smb_event_alloc_txid(void)
{
static kmutex_t txmutex;
static uint32_t txid;
uint32_t txid_ret;
mutex_enter(&txmutex);
if (txid == 0)
txid = ddi_get_lbolt() << 11;
do {
++txid;
} while (txid == 0 || txid == (uint32_t)-1);
txid_ret = txid;
mutex_exit(&txmutex);
return (txid_ret);
}
/*
* Called by the ioctl to find the corresponding
* spooldoc node. removes node on success
*
* Return values
* rc
* B_FALSE - not found
* B_TRUE - found
*
*/
static boolean_t
smb_spool_lookup_doc_byfid(smb_server_t *sv, uint16_t fid,
smb_kspooldoc_t *spdoc)
{
smb_kspooldoc_t *sp;
smb_llist_t *splist;
splist = &sv->sp_info.sp_list;
smb_llist_enter(splist, RW_WRITER);
sp = smb_llist_head(splist);
while (sp != NULL) {
/*
* check for a matching fid
*/
if (sp->sd_fid == fid) {
*spdoc = *sp;
smb_llist_remove(splist, sp);
smb_llist_exit(splist);
kmem_free(sp, sizeof (smb_kspooldoc_t));
return (B_TRUE);
}
sp = smb_llist_next(splist, sp);
}
cmn_err(CE_WARN, "smb_spool_lookup_user_byfid: no fid:%d", fid);
smb_llist_exit(splist);
return (B_FALSE);
}
/*
* Adds the spool fid to a linked list to be used
* as a search key in the spooldoc queue
*
* Return values
* rc non-zero error
* rc zero success
*
*/
void
smb_spool_add_fid(smb_server_t *sv, uint16_t fid)
{
smb_llist_t *fidlist;
smb_spoolfid_t *sf;
if (sv->sv_cfg.skc_print_enable == 0)
return;
sf = kmem_zalloc(sizeof (smb_spoolfid_t), KM_SLEEP);
fidlist = &sv->sp_info.sp_fidlist;
smb_llist_enter(fidlist, RW_WRITER);
sf->sf_fid = fid;
smb_llist_insert_tail(fidlist, sf);
smb_llist_exit(fidlist);
cv_broadcast(&sv->sp_info.sp_cv);
}
/*
* Called by the ioctl to get and remove the head of the fid list
*
* Return values
* int fd
* greater than 0 success
* 0 - error
*
*/
static uint16_t
smb_spool_get_fid(smb_server_t *sv)
{
smb_spoolfid_t *spfid;
smb_llist_t *splist;
uint16_t fid;
splist = &sv->sp_info.sp_fidlist;
smb_llist_enter(splist, RW_WRITER);
spfid = smb_llist_head(splist);
if (spfid != NULL) {
fid = spfid->sf_fid;
smb_llist_remove(&sv->sp_info.sp_fidlist, spfid);
kmem_free(spfid, sizeof (smb_spoolfid_t));
} else {
fid = 0;
}
smb_llist_exit(splist);
return (fid);
}
/*
* Adds the spooldoc to the tail of the spooldoc list
*
* Return values
* rc non-zero error
* rc zero success
*/
int
smb_spool_add_doc(smb_tree_t *tree, smb_kspooldoc_t *sp)
{
smb_llist_t *splist;
smb_server_t *sv = tree->t_server;
int rc = 0;
splist = &sv->sp_info.sp_list;
smb_llist_enter(splist, RW_WRITER);
sp->sd_spool_num = atomic_inc_32_nv(&sv->sp_info.sp_cnt);
smb_llist_insert_tail(splist, sp);
smb_llist_exit(splist);
return (rc);
}
/*
* smb_server_create_session
*/
static void
smb_server_create_session(smb_listener_daemon_t *ld, ksocket_t s_so)
{
smb_server_t *sv = ld->ld_sv;
smb_session_t *session;
smb_llist_t *sl;
taskqid_t tqid;
clock_t now;
session = smb_session_create(s_so, ld->ld_port, sv,
ld->ld_family);
if (session == NULL) {
/* This should be rare (create sleeps) */
smb_soshutdown(s_so);
smb_sodestroy(s_so);
cmn_err(CE_WARN, "SMB Session: alloc failed");
return;
}
sl = &sv->sv_session_list;
smb_llist_enter(sl, RW_WRITER);
if (smb_llist_get_count(sl) >= sv->sv_cfg.skc_maxconnections) {
/*
* New session not in sv_session_list, so we can just
* delete it directly.
*/
smb_llist_exit(sl);
DTRACE_PROBE1(maxconn, smb_session_t *, session);
smb_soshutdown(session->sock);
smb_session_delete(session);
goto logmaxconn;
}
smb_llist_insert_tail(sl, session);
smb_llist_exit(sl);
/*
* These taskq entries must run independently of one another,
* so TQ_NOQUEUE. TQ_SLEEP (==0) just for clarity.
*/
tqid = taskq_dispatch(sv->sv_receiver_pool,
smb_server_receiver, session, TQ_NOQUEUE | TQ_SLEEP);
if (tqid == TASKQID_INVALID) {
/*
* We never entered smb_server_receiver()
* so need to do it's return cleanup
*/
DTRACE_PROBE1(maxconn, smb_session_t *, session);
smb_session_disconnect(session);
smb_session_logoff(session);
smb_server_destroy_session(session);
goto logmaxconn;
}
/* Success */
session->s_receiver_tqid = tqid;
return;
logmaxconn:
/*
* If we hit max_connections, log something so an admin
* can find out why new connections are failing, but
* log this no more than once a minute.
*/
now = ddi_get_lbolt();
if (now > ld->ld_quiet) {
ld->ld_quiet = now + SEC_TO_TICK(60);
cmn_err(CE_WARN, "SMB can't create session: "
"Would exceed max_connections.");
}
}
static void
smb_server_destroy_session(smb_session_t *session)
{
smb_server_t *sv;
smb_llist_t *ll;
uint32_t count;
ASSERT(session->s_server != NULL);
sv = session->s_server;
ll = &sv->sv_session_list;
smb_llist_flush(&session->s_tree_list);
smb_llist_flush(&session->s_user_list);
/*
* The user and tree lists should be empty now.
*/
#ifdef DEBUG
if (session->s_user_list.ll_count != 0) {
cmn_err(CE_WARN, "user list not empty?");
debug_enter("s_user_list");
}
if (session->s_tree_list.ll_count != 0) {
cmn_err(CE_WARN, "tree list not empty?");
debug_enter("s_tree_list");
}
#endif
smb_llist_enter(ll, RW_WRITER);
smb_llist_remove(ll, session);
count = ll->ll_count;
smb_llist_exit(ll);
/*
* Normally, the session should have state SHUTDOWN here.
* If the session has any ofiles remaining, eg. due to
* forgotten ofile references or something, the state
* will be _DISCONNECTED or _TERMINATED. Keep such
* sessions in the list of zombies (for debugging).
*/
if (session->s_state == SMB_SESSION_STATE_SHUTDOWN) {
smb_session_delete(session);
} else {
#ifdef DEBUG
cmn_err(CE_NOTE, "Leaked session: 0x%p", (void *)session);
debug_enter("leaked session");
#endif
smb_llist_enter(&smb_server_session_zombies, RW_WRITER);
smb_llist_insert_head(&smb_server_session_zombies, session);
smb_llist_exit(&smb_server_session_zombies);
}
if (count == 0) {
/* See smb_server_shutdown */
cv_signal(&sv->sv_cv);
}
}