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freebsd-skq/sys/netsmb/smb_conn.c
davide 793cdde76e Fix panic due to page faults while in kernel mode, under conditions of 
VM pressure. The reason is that in some codepaths pointers to stack
variables were passed from one thread to another.

In collaboration with:	pho
Reported by:	pho's stress2 suite
Sponsored by:	iXsystems inc.
2012-10-31 03:34:07 +00:00

919 lines
21 KiB
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/*-
* 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.
*
* 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.
*/
/*
* Connection engine.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/sysctl.h>
#include <sys/socketvar.h>
#include <sys/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 */
SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
static MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection");
static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname,
char *lockname);
static void smb_co_done(struct smb_connobj *cp);
static int smb_co_lockstatus(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_sysctl_treedump(SYSCTL_HANDLER_ARGS);
SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
int
smb_sm_init(void)
{
smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
smb_co_unlock(&smb_vclist, 0);
return 0;
}
int
smb_sm_done(void)
{
/* XXX: hold the mutex */
if (smb_vclist.co_usecount > 1) {
SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
return EBUSY;
}
lockmgr(&smb_vclist.co_lock, LK_DRAIN, NULL);
smb_co_done(&smb_vclist);
return 0;
}
static int
smb_sm_lockvclist(int flags)
{
return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE);
}
static void
smb_sm_unlockvclist(void)
{
smb_co_unlock(&smb_vclist, LK_RELEASE);
}
static int
smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
struct smb_cred *scred, struct smb_vc **vcpp)
{
struct smb_connobj *scp;
struct smb_vc *vcp;
int exact = 1;
int error;
vcspec->shspec = shspec;
error = ENOENT;
vcp = NULL;
SMBCO_FOREACH(scp, &smb_vclist) {
vcp = (struct smb_vc *)scp;
error = smb_vc_lock(vcp, LK_EXCLUSIVE);
if (error)
continue;
if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
!CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
strcmp(vcp->vc_username, vcspec->username) != 0)
goto err1;
if (vcspec->owner != SMBM_ANY_OWNER) {
if (vcp->vc_uid != vcspec->owner)
goto err1;
} else
exact = 0;
if (vcspec->group != SMBM_ANY_GROUP) {
if (vcp->vc_grp != vcspec->group)
goto err1;
} else
exact = 0;
if (vcspec->mode & SMBM_EXACT) {
if (!exact || (vcspec->mode & SMBM_MASK) !=
vcp->vc_mode)
goto err1;
}
if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
goto err1;
vcspec->ssp = NULL;
if (shspec) {
error = (int)smb_vc_lookupshare(vcp, shspec, scred,
&vcspec->ssp);
if (error)
goto fail;
}
error = 0;
break;
err1:
error = 1;
fail:
smb_vc_unlock(vcp, 0);
}
if (vcp) {
smb_vc_ref(vcp);
*vcpp = vcp;
}
return (error);
}
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 error;
*vcpp = vcp = NULL;
error = smb_sm_lockvclist(LK_EXCLUSIVE);
if (error)
return error;
error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
smb_sm_unlockvclist();
return error;
}
error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
if (error) {
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_lock(vcp, LK_EXCLUSIVE);
smb_vc_put(vcp, scred);
}
return error;
}
/*
* Common code for connection object
*/
static void
smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname)
{
SLIST_INIT(&cp->co_children);
smb_sl_init(&cp->co_interlock, ilockname);
lockinit(&cp->co_lock, PZERO, lockname, 0, 0);
cp->co_level = level;
cp->co_usecount = 1;
if (smb_co_lock(cp, LK_EXCLUSIVE) != 0)
panic("smb_co_init: lock failed");
}
static void
smb_co_done(struct smb_connobj *cp)
{
smb_sl_destroy(&cp->co_interlock);
lockmgr(&cp->co_lock, LK_RELEASE, NULL);
lockdestroy(&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) {
smb_co_lock(parent, LK_EXCLUSIVE);
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)
{
SMB_CO_LOCK(cp);
cp->co_usecount++;
SMB_CO_UNLOCK(cp);
}
void
smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
{
SMB_CO_LOCK(cp);
if (cp->co_usecount > 1) {
cp->co_usecount--;
SMB_CO_UNLOCK(cp);
return;
}
if (cp->co_usecount == 0) {
SMBERROR("negative use_count for object %d", cp->co_level);
SMB_CO_UNLOCK(cp);
return;
}
cp->co_usecount--;
cp->co_flags |= SMBO_GONE;
lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock);
smb_co_gone(cp, scred);
}
int
smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred)
{
int error;
if ((flags & LK_INTERLOCK) == 0)
SMB_CO_LOCK(cp);
cp->co_usecount++;
error = smb_co_lock(cp, flags | LK_INTERLOCK);
if (error) {
SMB_CO_LOCK(cp);
cp->co_usecount--;
SMB_CO_UNLOCK(cp);
return error;
}
return 0;
}
void
smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
{
SMB_CO_LOCK(cp);
if (cp->co_usecount > 1) {
cp->co_usecount--;
} else if (cp->co_usecount == 1) {
cp->co_usecount--;
cp->co_flags |= SMBO_GONE;
} else {
SMBERROR("negative usecount");
}
lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock);
if ((cp->co_flags & SMBO_GONE) == 0)
return;
lockmgr(&cp->co_lock, LK_DRAIN, NULL);
smb_co_gone(cp, scred);
}
int
smb_co_lockstatus(struct smb_connobj *cp)
{
return lockstatus(&cp->co_lock);
}
int
smb_co_lock(struct smb_connobj *cp, int flags)
{
if (cp->co_flags & SMBO_GONE)
return EINVAL;
if ((flags & LK_TYPE_MASK) == 0)
flags |= LK_EXCLUSIVE;
if (smb_co_lockstatus(cp) == LK_EXCLUSIVE &&
(flags & LK_CANRECURSE) == 0) {
SMBERROR("recursive lock for object %d\n", cp->co_level);
return 0;
}
return lockmgr(&cp->co_lock, flags, &cp->co_interlock);
}
void
smb_co_unlock(struct smb_connobj *cp, int flags)
{
(void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock);
}
static void
smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
{
KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE,
("smb_co_addchild: parent not locked"));
KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE,
("smb_co_addchild: child not locked"));
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;
struct ucred *cred = scred->scr_cred;
uid_t uid = vcspec->owner;
gid_t gid = vcspec->group;
uid_t realuid = cred->cr_uid;
char *domain = vcspec->domain;
int error, isroot;
isroot = smb_suser(cred) == 0;
/*
* Only superuser can create VCs with different uid and gid
*/
if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
return EPERM;
if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
return EPERM;
vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc");
vcp->obj.co_free = smb_vc_free;
vcp->obj.co_gone = smb_vc_gone;
vcp->vc_number = smb_vcnext++;
vcp->vc_timo = SMB_DEFRQTIMO;
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;
vcp->vc_seqno = 0;
vcp->vc_mackey = NULL;
vcp->vc_mackeylen = 0;
if (uid == SMBM_ANY_OWNER)
uid = realuid;
if (gid == SMBM_ANY_GROUP)
gid = cred->cr_groups[0];
vcp->vc_uid = uid;
vcp->vc_grp = gid;
smb_sl_init(&vcp->vc_stlock, "vcstlock");
error = ENOMEM;
vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
if (vcp->vc_paddr == NULL)
goto fail;
vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
if (vcp->vc_laddr == NULL)
goto fail;
vcp->vc_pass = smb_strdup(vcspec->pass);
if (vcp->vc_pass == NULL)
goto fail;
vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
"NODOMAIN");
if (vcp->vc_domain == NULL)
goto fail;
vcp->vc_srvname = smb_strdup(vcspec->srvname);
if (vcp->vc_srvname == NULL)
goto fail;
vcp->vc_username = smb_strdup(vcspec->username);
if (vcp->vc_username == NULL)
goto fail;
error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
if (error)
goto fail;
error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
if (error)
goto fail;
if (vcspec->servercs[0]) {
error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
&vcp->vc_cp_toserver);
if (error)
goto fail;
error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
&vcp->vc_cp_tolocal);
if (error)
goto fail;
vcp->vc_toserver = vcp->vc_cp_toserver;
vcp->vc_tolocal = vcp->vc_cp_tolocal;
iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME);
iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE);
error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs,
&vcp->vc_ucs_toserver);
if (!error) {
error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME,
&vcp->vc_ucs_tolocal);
}
if (error) {
if (vcp->vc_ucs_toserver)
iconv_close(vcp->vc_ucs_toserver);
vcp->vc_ucs_toserver = NULL;
vcp->vc_ucs_tolocal = NULL;
}
}
error = (int)smb_iod_create(vcp);
if (error)
goto fail;
*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_mackey)
free(vcp->vc_mackey, M_SMBTEMP);
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)
vcp->vc_tolocal = NULL;
if (vcp->vc_toserver)
vcp->vc_toserver = NULL;
if (vcp->vc_cp_tolocal)
iconv_close(vcp->vc_cp_tolocal);
if (vcp->vc_cp_toserver)
iconv_close(vcp->vc_cp_toserver);
if (vcp->vc_ucs_tolocal)
iconv_close(vcp->vc_ucs_tolocal);
if (vcp->vc_ucs_toserver)
iconv_close(vcp->vc_ucs_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, int flags, struct smb_cred *scred)
{
return smb_co_get(VCTOCP(vcp), flags, scred);
}
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, int flags)
{
return smb_co_lock(VCTOCP(vcp), flags);
}
void
smb_vc_unlock(struct smb_vc *vcp, int flags)
{
smb_co_unlock(VCTOCP(vcp), flags);
}
int
smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
{
struct ucred *cred = scred->scr_cred;
if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
return 0;
mode >>= 3;
if (!groupmember(vcp->vc_grp, cred))
mode >>= 3;
return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
}
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 *scp = NULL;
struct smb_share *ssp = NULL;
int error;
*sspp = NULL;
dp->scred = scred;
SMBCO_FOREACH(scp, VCTOCP(vcp)) {
ssp = (struct smb_share *)scp;
error = smb_share_lock(ssp, LK_EXCLUSIVE);
if (error)
continue;
if (smb_vc_cmpshare(ssp, dp) == 0)
break;
smb_share_unlock(ssp, 0);
}
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 char smb_emptypass[] = "";
const char *
smb_vc_getpass(struct smb_vc *vcp)
{
if (vcp->vc_pass)
return vcp->vc_pass;
return smb_emptypass;
}
static int
smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
{
bzero(vip, sizeof(struct smb_vc_info));
vip->itype = SMB_INFO_VC;
vip->usecount = vcp->obj.co_usecount;
vip->uid = vcp->vc_uid;
vip->gid = vcp->vc_grp;
vip->mode = vcp->vc_mode;
vip->flags = vcp->obj.co_flags;
vip->sopt = vcp->vc_sopt;
vip->iodstate = vcp->vc_iod->iod_state;
bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
return 0;
}
u_short
smb_vc_nextmid(struct smb_vc *vcp)
{
u_short r;
SMB_CO_LOCK(&vcp->obj);
r = vcp->vc_mid++;
SMB_CO_UNLOCK(&vcp->obj);
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;
struct ucred *cred = scred->scr_cred;
uid_t realuid = cred->cr_uid;
uid_t uid = shspec->owner;
gid_t gid = shspec->group;
int error, isroot;
isroot = smb_suser(cred) == 0;
/*
* Only superuser can create shares with different uid and gid
*/
if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
return EPERM;
if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
return EPERM;
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 = cred->cr_groups[0];
ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "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, int flags, struct smb_cred *scred)
{
return smb_co_get(SSTOCP(ssp), flags, scred);
}
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, int flags)
{
return smb_co_lock(SSTOCP(ssp), flags);
}
void
smb_share_unlock(struct smb_share *ssp, int flags)
{
smb_co_unlock(SSTOCP(ssp), flags);
}
int
smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
{
struct ucred *cred = scred->scr_cred;
if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
return 0;
mode >>= 3;
if (!groupmember(ssp->ss_grp, cred))
mode >>= 3;
return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
}
void
smb_share_invalidate(struct smb_share *ssp)
{
ssp->ss_tid = SMB_TID_UNKNOWN;
}
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;
}
static int
smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
{
bzero(sip, sizeof(struct smb_share_info));
sip->itype = SMB_INFO_SHARE;
sip->usecount = ssp->obj.co_usecount;
sip->tid = ssp->ss_tid;
sip->type= ssp->ss_type;
sip->uid = ssp->ss_uid;
sip->gid = ssp->ss_grp;
sip->mode= ssp->ss_mode;
sip->flags = ssp->obj.co_flags;
snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
return 0;
}
/*
* Dump an entire tree into sysctl call
*/
static int
smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
{
struct smb_connobj *scp1, *scp2;
struct smb_vc *vcp;
struct smb_share *ssp;
struct smb_vc_info vci;
struct smb_share_info ssi;
int error, itype;
error = sysctl_wire_old_buffer(req, 0);
if (error)
return (error);
error = smb_sm_lockvclist(LK_SHARED);
if (error)
return error;
SMBCO_FOREACH(scp1, &smb_vclist) {
vcp = (struct smb_vc *)scp1;
error = smb_vc_lock(vcp, LK_SHARED);
if (error)
continue;
smb_vc_getinfo(vcp, &vci);
error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
if (error) {
smb_vc_unlock(vcp, 0);
break;
}
SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
ssp = (struct smb_share *)scp2;
error = smb_share_lock(ssp, LK_SHARED);
if (error) {
error = 0;
continue;
}
smb_share_getinfo(ssp, &ssi);
smb_share_unlock(ssp, 0);
error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
if (error)
break;
}
smb_vc_unlock(vcp, 0);
if (error)
break;
}
if (!error) {
itype = SMB_INFO_NONE;
error = SYSCTL_OUT(req, &itype, sizeof(itype));
}
smb_sm_unlockvclist();
return error;
}
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