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NetBSD/sys/netsmb/smb_conn.c

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/* $NetBSD: smb_conn.c,v 1.31 2020/02/21 00:26:23 joerg Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2000-2001 Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* FreeBSD: src/sys/netsmb/smb_conn.c,v 1.3 2001/12/02 08:47:29 bp Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smb_conn.c,v 1.31 2020/02/21 00:26:23 joerg Exp $");
/*
* Connection engine.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h> /* for M_SONAME */
#include <sys/kauth.h>
#include <netsmb/iconv.h>
#include <netsmb/smb.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_tran.h>
#include <netsmb/smb_trantcp.h>
static struct smb_connobj smb_vclist;
static int smb_vcnext = 1; /* next unique id for VC */
static kauth_listener_t smb_listener;
MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection");
MALLOC_DECLARE(M_SMBCONN);
static void smb_co_init(struct smb_connobj *cp, int level, const char *objname);
static void smb_co_done(struct smb_connobj *cp);
static int smb_vc_disconnect(struct smb_vc *vcp);
static void smb_vc_free(struct smb_connobj *cp);
static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
static smb_co_free_t smb_share_free;
static smb_co_gone_t smb_share_gone;
static int
smb_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie,
void *arg0, void *arg1, void *arg2, void *arg3)
{
int result, ismember = 0;
enum kauth_network_req req;
if (action != KAUTH_NETWORK_SMB)
return KAUTH_RESULT_DEFER;
result = KAUTH_RESULT_DEFER;
req = (enum kauth_network_req)(uintptr_t)arg0;
switch (req) {
case KAUTH_REQ_NETWORK_SMB_SHARE_ACCESS: {
struct smb_share *ssp = arg1;
mode_t mode = (mode_t)(uintptr_t)arg2;
/* Owner can access. */
if (kauth_cred_geteuid(cred) == ssp->ss_uid) {
result = KAUTH_RESULT_ALLOW;
break;
}
/* Try group permissions if member or other if not. */
mode >>= 3;
if (kauth_cred_ismember_gid(cred, ssp->ss_grp, &ismember) != 0 ||
!ismember)
mode >>= 3;
if ((ssp->ss_mode & mode) == mode)
result = KAUTH_RESULT_ALLOW;
break;
}
case KAUTH_REQ_NETWORK_SMB_SHARE_CREATE: {
struct smb_sharespec *shspec = arg1;
/*
* Only superuser can create shares with different uid and gid
*/
if (shspec->owner != SMBM_ANY_OWNER &&
shspec->owner != kauth_cred_geteuid(cred))
break;
if (shspec->group != SMBM_ANY_GROUP &&
(kauth_cred_ismember_gid(cred, shspec->group, &ismember) != 0 || !ismember))
break;
result = KAUTH_RESULT_ALLOW;
break;
}
case KAUTH_REQ_NETWORK_SMB_VC_ACCESS: {
struct smb_vc *vcp = arg1;
mode_t mode = (mode_t)(uintptr_t)arg2;
/* Owner can access. */
if (kauth_cred_geteuid(cred) == vcp->vc_uid) {
result = KAUTH_RESULT_ALLOW;
break;
}
/* Try group permissions if member or other if not. */
mode >>= 3;
if (kauth_cred_ismember_gid(cred, vcp->vc_grp, &ismember) != 0 ||
!ismember)
mode >>= 3;
if ((vcp->vc_mode & mode) == mode)
result = KAUTH_RESULT_ALLOW;
break;
}
case KAUTH_REQ_NETWORK_SMB_VC_CREATE: {
struct smb_vcspec *vcspec = arg1;
/*
* Only superuser can create VCs with different uid and gid
*/
if (vcspec->owner != SMBM_ANY_OWNER &&
vcspec->owner != kauth_cred_geteuid(cred))
break;
if (vcspec->group != SMBM_ANY_GROUP &&
(kauth_cred_ismember_gid(cred, vcspec->group, &ismember) != 0 || !ismember))
break;
result = KAUTH_RESULT_ALLOW;
break;
}
default:
break;
}
return result;
}
int
smb_sm_init(void)
{
smb_co_init(&smb_vclist, SMBL_SM, "smbsm");
mutex_enter(&smb_vclist.co_interlock);
smb_co_unlock(&smb_vclist);
mutex_exit(&smb_vclist.co_interlock);
smb_listener = kauth_listen_scope(KAUTH_SCOPE_NETWORK,
smb_listener_cb, NULL);
return 0;
}
int
smb_sm_done(void)
{
/* XXX: hold the mutex */
#ifdef DIAGNOSTIC
if (smb_vclist.co_usecount > 1)
panic("%d connections still active", smb_vclist.co_usecount - 1);
#endif
smb_co_done(&smb_vclist);
kauth_unlisten_scope(smb_listener);
return 0;
}
static int
smb_sm_lockvclist(void)
{
int error;
mutex_enter(&smb_vclist.co_interlock);
error = smb_co_lock(&smb_vclist);
mutex_exit(&smb_vclist.co_interlock);
return error;
}
static void
smb_sm_unlockvclist(void)
{
mutex_enter(&smb_vclist.co_interlock);
smb_co_unlock(&smb_vclist);
mutex_exit(&smb_vclist.co_interlock);
}
static int
smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
struct smb_cred *scred, struct smb_vc **vcpp)
{
struct smb_connobj *ocp;
int exact = 1;
int fail = 1;
vcspec->shspec = shspec;
SMBCO_FOREACH(ocp, &smb_vclist) {
struct smb_vc *vcp = (struct smb_vc *)ocp;
if (smb_vc_lock(vcp) != 0)
continue;
do {
if ((ocp->co_flags & SMBV_PRIVATE) ||
!CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
strcmp(vcp->vc_username, vcspec->username) != 0)
break;
if (vcspec->owner != SMBM_ANY_OWNER) {
if (vcp->vc_uid != vcspec->owner)
break;
} else
exact = 0;
if (vcspec->group != SMBM_ANY_GROUP) {
if (vcp->vc_grp != vcspec->group)
break;
} else
exact = 0;
if (vcspec->mode & SMBM_EXACT) {
if (!exact ||
(vcspec->mode & SMBM_MASK) != vcp->vc_mode)
break;
}
if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
break;
vcspec->ssp = NULL;
if (shspec
&&smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp) != 0)
break;
/* if we get here, all checks succeeded */
smb_vc_ref(vcp);
*vcpp = vcp;
fail = 0;
goto out;
} while(0);
smb_vc_unlock(vcp);
}
out:
return fail;
}
int
smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
struct smb_cred *scred, struct smb_vc **vcpp)
{
struct smb_vc *vcp;
struct smb_share *ssp = NULL;
int fail, error;
*vcpp = vcp = NULL;
error = smb_sm_lockvclist();
if (error)
return error;
fail = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
if (!fail || (vcspec->flags & SMBV_CREATE) == 0) {
smb_sm_unlockvclist();
return 0;
}
fail = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
if (fail) {
error = smb_vc_create(vcspec, scred, &vcp);
if (error)
goto out;
error = smb_vc_connect(vcp, scred);
if (error)
goto out;
}
if (shspec == NULL)
goto out;
error = smb_share_create(vcp, shspec, scred, &ssp);
if (error)
goto out;
error = smb_smb_treeconnect(ssp, scred);
if (error == 0)
vcspec->ssp = ssp;
else
smb_share_put(ssp, scred);
out:
smb_sm_unlockvclist();
if (error == 0)
*vcpp = vcp;
else if (vcp)
smb_vc_put(vcp, scred);
return error;
}
/*
* Common code for connection object
*/
static void
smb_co_init(struct smb_connobj *cp, int level, const char *objname)
{
SLIST_INIT(&cp->co_children);
smb_sl_init(&cp->co_interlock, objname);
cv_init(&cp->co_lock, "smblock");
cp->co_lockcnt = 0;
cp->co_locker = NULL;
cp->co_level = level;
cp->co_usecount = 1;
mutex_enter(&cp->co_interlock);
smb_co_lock(cp);
mutex_exit(&cp->co_interlock);
}
static void
smb_co_done(struct smb_connobj *cp)
{
smb_sl_destroy(&cp->co_interlock);
cv_destroy(&cp->co_lock);
}
static void
smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
{
struct smb_connobj *parent;
if (cp->co_gone)
cp->co_gone(cp, scred);
parent = cp->co_parent;
if (parent) {
mutex_enter(&parent->co_interlock);
smb_co_lock(parent);
mutex_exit(&parent->co_interlock);
SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
smb_co_put(parent, scred);
}
if (cp->co_free)
cp->co_free(cp);
}
void
smb_co_ref(struct smb_connobj *cp)
{
mutex_enter(&cp->co_interlock);
cp->co_usecount++;
mutex_exit(&cp->co_interlock);
}
void
smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
{
mutex_enter(&cp->co_interlock);
smb_co_unlock(cp);
if (cp->co_usecount > 1) {
cp->co_usecount--;
mutex_exit(&cp->co_interlock);
return;
}
#ifdef DIAGNOSTIC
if (cp->co_usecount == 0)
panic("negative use_count for object %d", cp->co_level);
#endif
cp->co_usecount--;
cp->co_flags |= SMBO_GONE;
mutex_exit(&cp->co_interlock);
smb_co_gone(cp, scred);
}
int
smb_co_get(struct smb_connobj *cp, struct smb_cred *scred)
{
int error;
KASSERT(mutex_owned(&cp->co_interlock));
cp->co_usecount++;
error = smb_co_lock(cp);
if (error)
cp->co_usecount--;
return error;
}
void
smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
{
mutex_enter(&cp->co_interlock);
if (cp->co_usecount > 1) {
cp->co_usecount--;
} else if (cp->co_usecount == 1) {
cp->co_usecount--;
cp->co_flags |= SMBO_GONE;
}
#ifdef DIAGNOSTIC
else
panic("smb_co_put: negative usecount");
#endif
smb_co_unlock(cp);
mutex_exit(&cp->co_interlock);
if ((cp->co_flags & SMBO_GONE) == 0)
return;
smb_co_gone(cp, scred);
}
int
smb_co_lock(struct smb_connobj *cp)
{
KASSERT(mutex_owned(&cp->co_interlock));
for (;;) {
if (cp->co_flags & SMBO_GONE)
return EINVAL;
if (cp->co_locker == NULL) {
cp->co_locker = curlwp;
return 0;
}
if (cp->co_locker == curlwp) {
cp->co_lockcnt++;
return 0;
}
cv_wait(&cp->co_lock, &cp->co_interlock);
}
}
void
smb_co_unlock(struct smb_connobj *cp)
{
KASSERT(mutex_owned(&cp->co_interlock));
KASSERT(cp->co_locker == curlwp);
if (cp->co_lockcnt != 0) {
cp->co_lockcnt--;
return;
}
cp->co_locker = NULL;
cv_signal(&cp->co_lock);
}
static void
smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
{
smb_co_ref(parent);
SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
child->co_parent = parent;
}
/*
* Session implementation
*/
int
smb_vc_create(struct smb_vcspec *vcspec,
struct smb_cred *scred, struct smb_vc **vcpp)
{
struct smb_vc *vcp;
kauth_cred_t cred = scred->scr_cred;
uid_t uid = vcspec->owner;
gid_t gid = vcspec->group;
uid_t realuid;
char *domain = vcspec->domain;
int error;
error = kauth_authorize_network(cred, KAUTH_NETWORK_SMB,
KAUTH_REQ_NETWORK_SMB_VC_CREATE, vcspec, NULL, NULL);
if (error)
return EPERM;
realuid = kauth_cred_geteuid(cred);
vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc");
vcp->obj.co_free = smb_vc_free;
vcp->obj.co_gone = smb_vc_gone;
vcp->vc_number = smb_vcnext++;
vcp->vc_smbuid = SMB_UID_UNKNOWN;
vcp->vc_mode = vcspec->rights & SMBM_MASK;
vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
vcp->vc_tdesc = &smb_tran_nbtcp_desc;
if (uid == SMBM_ANY_OWNER)
uid = realuid;
if (gid == SMBM_ANY_GROUP)
gid = kauth_cred_group(cred, 0);
vcp->vc_uid = uid;
vcp->vc_grp = gid;
smb_sl_init(&vcp->vc_stlock, "vcstlock");
error = ENOMEM;
if ((vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1)) == NULL)
goto fail;
if (vcspec->lap &&
(vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1)) == NULL)
goto fail;
if ((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL)
goto fail;
vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN");
if (vcp->vc_domain == NULL)
goto fail;
if ((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL)
goto fail;
if ((vcp->vc_username = smb_strdup(vcspec->username)) == NULL)
goto fail;
#define ithrow(cmd) \
if ((error = cmd)) \
goto fail
ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower));
ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper));
if (vcspec->servercs[0]) {
ithrow(iconv_open(vcspec->servercs, vcspec->localcs,
&vcp->vc_toserver));
ithrow(iconv_open(vcspec->localcs, vcspec->servercs,
&vcp->vc_tolocal));
}
ithrow(smb_iod_create(vcp));
#undef ithrow
/* all is well, return success */
*vcpp = vcp;
smb_co_addchild(&smb_vclist, VCTOCP(vcp));
return 0;
fail:
smb_vc_put(vcp, scred);
return (error);
}
static void
smb_vc_free(struct smb_connobj *cp)
{
struct smb_vc *vcp = CPTOVC(cp);
if (vcp->vc_iod)
smb_iod_destroy(vcp->vc_iod);
SMB_STRFREE(vcp->vc_username);
SMB_STRFREE(vcp->vc_srvname);
SMB_STRFREE(vcp->vc_pass);
SMB_STRFREE(vcp->vc_domain);
if (vcp->vc_paddr)
free(vcp->vc_paddr, M_SONAME);
if (vcp->vc_laddr)
free(vcp->vc_laddr, M_SONAME);
if (vcp->vc_tolower)
iconv_close(vcp->vc_tolower);
if (vcp->vc_toupper)
iconv_close(vcp->vc_toupper);
if (vcp->vc_tolocal)
iconv_close(vcp->vc_tolocal);
if (vcp->vc_toserver)
iconv_close(vcp->vc_toserver);
smb_co_done(VCTOCP(vcp));
smb_sl_destroy(&vcp->vc_stlock);
free(vcp, M_SMBCONN);
}
/*
* Called when use count of VC dropped to zero.
* VC should be locked on enter with LK_DRAIN.
*/
static void
smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
{
struct smb_vc *vcp = CPTOVC(cp);
smb_vc_disconnect(vcp);
}
void
smb_vc_ref(struct smb_vc *vcp)
{
smb_co_ref(VCTOCP(vcp));
}
void
smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
{
smb_co_rele(VCTOCP(vcp), scred);
}
int
smb_vc_get(struct smb_vc *vcp, struct smb_cred *scred)
{
struct smb_connobj *cp = VCTOCP(vcp);
int error;
mutex_enter(&cp->co_interlock);
error = smb_co_get(cp, scred);
mutex_exit(&cp->co_interlock);
return error;
}
void
smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
{
smb_co_put(VCTOCP(vcp), scred);
}
int
smb_vc_lock(struct smb_vc *vcp)
{
struct smb_connobj *cp = VCTOCP(vcp);
int error;
mutex_enter(&cp->co_interlock);
error = smb_co_lock(cp);
mutex_exit(&cp->co_interlock);
return error;
}
void
smb_vc_unlock(struct smb_vc *vcp)
{
struct smb_connobj *cp = VCTOCP(vcp);
mutex_enter(&cp->co_interlock);
smb_co_unlock(cp);
mutex_exit(&cp->co_interlock);
}
int
smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
{
kauth_cred_t cred = scred->scr_cred;
int error;
error = kauth_authorize_network(cred, KAUTH_NETWORK_SMB,
KAUTH_REQ_NETWORK_SMB_VC_ACCESS, vcp, KAUTH_ARG(mode), NULL);
if (error)
return EACCES;
return 0;
}
static int
smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
{
int exact = 1;
if (strcmp(ssp->ss_name, dp->name) != 0)
return 1;
if (dp->owner != SMBM_ANY_OWNER) {
if (ssp->ss_uid != dp->owner)
return 1;
} else
exact = 0;
if (dp->group != SMBM_ANY_GROUP) {
if (ssp->ss_grp != dp->group)
return 1;
} else
exact = 0;
if (dp->mode & SMBM_EXACT) {
if (!exact)
return 1;
return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
}
if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
return 1;
return 0;
}
/*
* Lookup share in the given VC. Share referenced and locked on return.
* VC expected to be locked on entry and will be left locked on exit.
*/
int
smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
struct smb_cred *scred, struct smb_share **sspp)
{
struct smb_connobj *osp;
struct smb_share *ssp = NULL;
int error;
*sspp = NULL;
dp->scred = scred;
SMBCO_FOREACH(osp, VCTOCP(vcp)) {
ssp = (struct smb_share *)osp;
error = smb_share_lock(ssp);
if (error)
continue;
if (smb_vc_cmpshare(ssp, dp) == 0)
break;
smb_share_unlock(ssp);
}
if (ssp) {
smb_share_ref(ssp);
*sspp = ssp;
error = 0;
} else
error = ENOENT;
return error;
}
int
smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
{
return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
}
/*
* Destroy VC to server, invalidate shares linked with it.
* Transport should be locked on entry.
*/
int
smb_vc_disconnect(struct smb_vc *vcp)
{
smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL);
return 0;
}
static const char * const smb_emptypass = "";
const char *
smb_vc_getpass(struct smb_vc *vcp)
{
if (vcp->vc_pass)
return vcp->vc_pass;
return smb_emptypass;
}
u_short
smb_vc_nextmid(struct smb_vc *vcp)
{
u_short r;
mutex_enter(&vcp->obj.co_interlock);
r = vcp->vc_mid++;
mutex_exit(&vcp->obj.co_interlock);
return r;
}
/*
* Share implementation
*/
/*
* Allocate share structure and attach it to the given VC
* Connection expected to be locked on entry. Share will be returned
* in locked state.
*/
int
smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
struct smb_cred *scred, struct smb_share **sspp)
{
struct smb_share *ssp;
kauth_cred_t cred = scred->scr_cred;
uid_t realuid;
uid_t uid = shspec->owner;
gid_t gid = shspec->group;
int error;
error = kauth_authorize_network(cred, KAUTH_NETWORK_SMB,
KAUTH_REQ_NETWORK_SMB_SHARE_CREATE, shspec, NULL, NULL);
if (error)
return EPERM;
realuid = kauth_cred_geteuid(cred);
error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
if (!error) {
smb_share_put(ssp, scred);
return EEXIST;
}
if (uid == SMBM_ANY_OWNER)
uid = realuid;
if (gid == SMBM_ANY_GROUP)
gid = kauth_cred_group(cred, 0);
ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss");
ssp->obj.co_free = smb_share_free;
ssp->obj.co_gone = smb_share_gone;
smb_sl_init(&ssp->ss_stlock, "ssstlock");
ssp->ss_name = smb_strdup(shspec->name);
if (shspec->pass && shspec->pass[0])
ssp->ss_pass = smb_strdup(shspec->pass);
ssp->ss_type = shspec->stype;
ssp->ss_tid = SMB_TID_UNKNOWN;
ssp->ss_uid = uid;
ssp->ss_grp = gid;
ssp->ss_mode = shspec->rights & SMBM_MASK;
smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
*sspp = ssp;
return 0;
}
static void
smb_share_free(struct smb_connobj *cp)
{
struct smb_share *ssp = CPTOSS(cp);
SMB_STRFREE(ssp->ss_name);
SMB_STRFREE(ssp->ss_pass);
smb_sl_destroy(&ssp->ss_stlock);
smb_co_done(SSTOCP(ssp));
free(ssp, M_SMBCONN);
}
static void
smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
{
struct smb_share *ssp = CPTOSS(cp);
smb_smb_treedisconnect(ssp, scred);
}
void
smb_share_ref(struct smb_share *ssp)
{
smb_co_ref(SSTOCP(ssp));
}
void
smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
{
smb_co_rele(SSTOCP(ssp), scred);
}
int
smb_share_get(struct smb_share *ssp, struct smb_cred *scred)
{
struct smb_connobj *cp = SSTOCP(ssp);
int error;
mutex_enter(&cp->co_interlock);
error = smb_co_get(cp, scred);
mutex_exit(&cp->co_interlock);
return error;
}
void
smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
{
smb_co_put(SSTOCP(ssp), scred);
}
int
smb_share_lock(struct smb_share *ssp)
{
struct smb_connobj *cp = SSTOCP(ssp);
int error;
mutex_enter(&cp->co_interlock);
error = smb_co_lock(cp);
mutex_exit(&cp->co_interlock);
return error;
}
void
smb_share_unlock(struct smb_share *ssp)
{
struct smb_connobj *cp = SSTOCP(ssp);
mutex_enter(&cp->co_interlock);
smb_co_unlock(cp);
mutex_exit(&cp->co_interlock);
}
int
smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
{
kauth_cred_t cred = scred->scr_cred;
int error;
error = kauth_authorize_network(cred, KAUTH_NETWORK_SMB,
KAUTH_REQ_NETWORK_SMB_SHARE_ACCESS, ssp, KAUTH_ARG(mode), NULL);
if (error)
return EACCES;
return 0;
}
int
smb_share_valid(struct smb_share *ssp)
{
return ssp->ss_tid != SMB_TID_UNKNOWN &&
ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
}
const char*
smb_share_getpass(struct smb_share *ssp)
{
struct smb_vc *vcp;
if (ssp->ss_pass)
return ssp->ss_pass;
vcp = SSTOVC(ssp);
if (vcp->vc_pass)
return vcp->vc_pass;
return smb_emptypass;
}
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