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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * 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/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 | CTLFLAG_MPSAFE, 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_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 | CTLFLAG_MPSAFE,
- NULL, 0, smb_sysctl_treedump, "S,treedump",
- "Requester tree");
- int
- smb_sm_init(void)
- {
- smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
- sx_xlock(&smb_vclist.co_interlock);
- smb_co_unlock(&smb_vclist);
- sx_unlock(&smb_vclist.co_interlock);
- 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;
- }
- smb_co_done(&smb_vclist);
- return 0;
- }
- static int
- smb_sm_lockvclist(void)
- {
- int error;
- sx_xlock(&smb_vclist.co_interlock);
- error = smb_co_lock(&smb_vclist);
- sx_unlock(&smb_vclist.co_interlock);
- return error;
- }
- static void
- smb_sm_unlockvclist(void)
- {
- sx_xlock(&smb_vclist.co_interlock);
- smb_co_unlock(&smb_vclist);
- sx_unlock(&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 *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);
- 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);
- }
- 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();
- 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);
- 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);
- sx_init_flags(&cp->co_interlock, ilockname, SX_RECURSE);
- cv_init(&cp->co_lock, "smblock");
- cp->co_lockcnt = 0;
- cp->co_locker = NULL;
- cp->co_level = level;
- cp->co_usecount = 1;
- sx_xlock(&cp->co_interlock);
- smb_co_lock(cp);
- sx_unlock(&cp->co_interlock);
- }
- static void
- smb_co_done(struct smb_connobj *cp)
- {
- sx_destroy(&cp->co_interlock);
- cv_destroy(&cp->co_lock);
- cp->co_locker = NULL;
- cp->co_flags = 0;
- cp->co_lockcnt = 0;
- }
- 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) {
- sx_xlock(&parent->co_interlock);
- smb_co_lock(parent);
- sx_unlock(&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)
- {
- sx_xlock(&cp->co_interlock);
- cp->co_usecount++;
- sx_unlock(&cp->co_interlock);
- }
- void
- smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
- {
- sx_xlock(&cp->co_interlock);
- smb_co_unlock(cp);
- if (cp->co_usecount > 1) {
- cp->co_usecount--;
- sx_unlock(&cp->co_interlock);
- return;
- }
- if (cp->co_usecount == 0) {
- SMBERROR("negative use_count for object %d", cp->co_level);
- sx_unlock(&cp->co_interlock);
- return;
- }
- cp->co_usecount--;
- cp->co_flags |= SMBO_GONE;
- sx_unlock(&cp->co_interlock);
- smb_co_gone(cp, scred);
- }
- int
- smb_co_get(struct smb_connobj *cp, struct smb_cred *scred)
- {
- int error;
- MPASS(sx_xholder(&cp->co_interlock) == curthread);
- 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)
- {
- sx_xlock(&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;
- } else {
- SMBERROR("negative usecount");
- }
- smb_co_unlock(cp);
- sx_unlock(&cp->co_interlock);
- if ((cp->co_flags & SMBO_GONE) == 0)
- return;
- smb_co_gone(cp, scred);
- }
- int
- smb_co_lock(struct smb_connobj *cp)
- {
- MPASS(sx_xholder(&cp->co_interlock) == curthread);
- for (;;) {
- if (cp->co_flags & SMBO_GONE)
- return EINVAL;
- if (cp->co_locker == NULL) {
- cp->co_locker = curthread;
- return 0;
- }
- if (cp->co_locker == curthread) {
- cp->co_lockcnt++;
- return 0;
- }
- cv_wait(&cp->co_lock, &cp->co_interlock);
- }
- }
- void
- smb_co_unlock(struct smb_connobj *cp)
- {
- MPASS(sx_xholder(&cp->co_interlock) == curthread);
- MPASS(cp->co_locker == curthread);
- 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;
- 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.
- */
- 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;
- int error;
- cp = VCTOCP(vcp);
- sx_xlock(&cp->co_interlock);
- error = smb_co_get(cp, scred);
- sx_unlock(&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;
- int error;
- cp = VCTOCP(vcp);
- sx_xlock(&cp->co_interlock);
- error = smb_co_lock(cp);
- sx_unlock(&cp->co_interlock);
- return error;
- }
- void
- smb_vc_unlock(struct smb_vc *vcp)
- {
- struct smb_connobj *cp;
- cp = VCTOCP(vcp);
- sx_xlock(&cp->co_interlock);
- smb_co_unlock(cp);
- sx_unlock(&cp->co_interlock);
- }
- 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);
- 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)
- {
- if (vcp->vc_iod != NULL)
- 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;
- sx_xlock(&vcp->obj.co_interlock);
- r = vcp->vc_mid++;
- sx_unlock(&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;
- 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, struct smb_cred *scred)
- {
- struct smb_connobj *cp = SSTOCP(ssp);
- int error;
- sx_xlock(&cp->co_interlock);
- error = smb_co_get(cp, scred);
- sx_unlock(&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;
- int error;
- cp = SSTOCP(ssp);
- sx_xlock(&cp->co_interlock);
- error = smb_co_lock(cp);
- sx_unlock(&cp->co_interlock);
- return error;
- }
- void
- smb_share_unlock(struct smb_share *ssp)
- {
- struct smb_connobj *cp;
- cp = SSTOCP(ssp);
- sx_xlock(&cp->co_interlock);
- smb_co_unlock(cp);
- sx_unlock(&cp->co_interlock);
- }
- 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();
- if (error)
- return error;
- SMBCO_FOREACH(scp1, &smb_vclist) {
- vcp = (struct smb_vc *)scp1;
- error = smb_vc_lock(vcp);
- if (error)
- continue;
- smb_vc_getinfo(vcp, &vci);
- error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
- if (error) {
- smb_vc_unlock(vcp);
- break;
- }
- SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
- ssp = (struct smb_share *)scp2;
- error = smb_share_lock(ssp);
- if (error) {
- error = 0;
- continue;
- }
- smb_share_getinfo(ssp, &ssi);
- smb_share_unlock(ssp);
- error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
- if (error)
- break;
- }
- smb_vc_unlock(vcp);
- 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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