/* * 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 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T. * All rights reserved. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define EXPTABLESIZE 16 struct exportinfo *exptable[EXPTABLESIZE]; static int unexport(fsid_t *, fid_t *, vnode_t *); static void exportfree(struct exportinfo *); static int loadindex(struct exportdata *); extern void nfsauth_cache_free(struct exportinfo *); extern int sec_svc_loadrootnames(int, int, caddr_t **, model_t); extern void sec_svc_freerootnames(int, int, caddr_t *); #ifdef VOLATILE_FH_TEST static struct ex_vol_rename *find_volrnm_fh(struct exportinfo *, nfs_fh4 *); static uint32_t find_volrnm_fh_id(struct exportinfo *, nfs_fh4 *); static void free_volrnm_list(struct exportinfo *); #endif /* VOLATILE_FH_TEST */ /* * exported_lock Read/Write lock that protects the exportinfo list. * This lock must be held when searching or modifiying * the exportinfo list. */ krwlock_t exported_lock; /* * "public" and default (root) location for public filehandle */ struct exportinfo *exi_public, *exi_root; fid_t exi_rootfid; /* for checking the default public file handle */ fhandle_t nullfh2; /* for comparing V2 filehandles */ #define exptablehash(fsid, fid) (nfs_fhhash((fsid), (fid)) & (EXPTABLESIZE - 1)) /* * File handle hash function, good for producing hash values 16 bits wide. */ int nfs_fhhash(fsid_t *fsid, fid_t *fid) { short *data; int i, len; short h; ASSERT(fid != NULL); data = (short *)fid->fid_data; /* fid_data must be aligned on a short */ ASSERT((((uintptr_t)data) & (sizeof (short) - 1)) == 0); if (fid->fid_len == 10) { /* * probably ufs: hash on bytes 4,5 and 8,9 */ return (fsid->val[0] ^ data[2] ^ data[4]); } if (fid->fid_len == 6) { /* * probably hsfs: hash on bytes 0,1 and 4,5 */ return ((fsid->val[0] ^ data[0] ^ data[2])); } /* * Some other file system. Assume that every byte is * worth hashing. */ h = (short)fsid->val[0]; /* * Sanity check the length before using it * blindly in case the client trashed it. */ if (fid->fid_len > NFS_FHMAXDATA) len = 0; else len = fid->fid_len / sizeof (short); /* * This will ignore one byte if len is not a multiple of * of sizeof (short). No big deal since we at least get some * variation with fsid->val[0]; */ for (i = 0; i < len; i++) h ^= data[i]; return ((int)h); } /* * Free the memory allocated within a secinfo entry. */ void srv_secinfo_entry_free(struct secinfo *secp) { if (secp->s_rootcnt > 0 && secp->s_rootnames != NULL) { sec_svc_freerootnames(secp->s_secinfo.sc_rpcnum, secp->s_rootcnt, secp->s_rootnames); secp->s_rootcnt = 0; } if ((secp->s_secinfo.sc_rpcnum == RPCSEC_GSS) && (secp->s_secinfo.sc_gss_mech_type)) { kmem_free(secp->s_secinfo.sc_gss_mech_type->elements, secp->s_secinfo.sc_gss_mech_type->length); kmem_free(secp->s_secinfo.sc_gss_mech_type, sizeof (rpc_gss_OID_desc)); secp->s_secinfo.sc_gss_mech_type = NULL; } } /* * Free a list of secinfo allocated in the exportdata structure. */ void srv_secinfo_list_free(struct secinfo *secinfo, int cnt) { int i; if (cnt == 0) return; for (i = 0; i < cnt; i++) srv_secinfo_entry_free(&secinfo[i]); kmem_free(secinfo, cnt * sizeof (struct secinfo)); } /* * Allocate and copy a secinfo data from "from" to "to". * * This routine is used by srv_secinfo_add() to add a new flavor to an * ancestor's export node. The rootnames are not copied because the * allowable rootname access only applies to the explicit exported node, * not its ancestor's. * * "to" should have already been allocated and zeroed before calling * this routine. * * This routine is used under the protection of exported_lock (RW_WRITER). */ void srv_secinfo_copy(struct secinfo *from, struct secinfo *to) { to->s_secinfo.sc_nfsnum = from->s_secinfo.sc_nfsnum; to->s_secinfo.sc_rpcnum = from->s_secinfo.sc_rpcnum; if (from->s_secinfo.sc_rpcnum == RPCSEC_GSS) { to->s_secinfo.sc_service = from->s_secinfo.sc_service; bcopy(from->s_secinfo.sc_name, to->s_secinfo.sc_name, strlen(from->s_secinfo.sc_name)); bcopy(from->s_secinfo.sc_gss_mech, to->s_secinfo.sc_gss_mech, strlen(from->s_secinfo.sc_gss_mech)); /* copy mechanism oid */ to->s_secinfo.sc_gss_mech_type = kmem_alloc(sizeof (rpc_gss_OID_desc), KM_SLEEP); to->s_secinfo.sc_gss_mech_type->length = from->s_secinfo.sc_gss_mech_type->length; to->s_secinfo.sc_gss_mech_type->elements = kmem_alloc(from->s_secinfo.sc_gss_mech_type->length, KM_SLEEP); bcopy(from->s_secinfo.sc_gss_mech_type->elements, to->s_secinfo.sc_gss_mech_type->elements, from->s_secinfo.sc_gss_mech_type->length); } to->s_refcnt = from->s_refcnt; to->s_window = from->s_window; /* no need to copy the mode bits - s_flags */ } /* * Create an secinfo array without duplicates to facilitate * flavor merging. */ int32_t build_seclist_nodups(struct exportdata *data, struct secinfo *nsec) { int i, j, dup; /* counters */ int tcnt; /* total sec count */ int32_t ncnt; tcnt = data->ex_seccnt; /* Populate exportdata structure only with non duplicate flavors */ for (i = 0, ncnt = 0; i < tcnt; i++) { /* see if previous dup copied */ for (j = 0, dup = 0; j < i; j++) { if (data->ex_secinfo[i].s_secinfo.sc_nfsnum == data->ex_secinfo[j].s_secinfo.sc_nfsnum) { dup = 1; break; } } if (dup == 0) { bcopy(&data->ex_secinfo[i], &nsec[ncnt], sizeof (struct secinfo)); ncnt++; } } return (ncnt); } /* * Add the new security flavors from newdata to the current list, curdata. * Upon return, curdata has the newly merged secinfo list. * * There should be at least 1 secinfo entry in newdata. * * This routine is used under the protection of exported_lock (RW_WRITER). */ void srv_secinfo_add(struct exportdata *curdata, struct secinfo *newsecinfo, int ncnt) { int ccnt, c; /* sec count in current data - curdata */ int n; /* sec count in new data - newsecinfo */ int tcnt, mcnt; /* total sec count after merge */ struct secinfo *msec; /* merged secinfo list */ ccnt = curdata->ex_seccnt; ASSERT(ncnt > 0); tcnt = ccnt + ncnt; for (n = 0; n < ncnt; n++) { for (c = 0; c < ccnt; c++) { if (newsecinfo[n].s_secinfo.sc_nfsnum == curdata->ex_secinfo[c].s_secinfo.sc_nfsnum) { /* * add the reference count of the newsecinfo * to the curdata for this nfs flavor. */ curdata->ex_secinfo[c].s_refcnt += newsecinfo[n].s_refcnt; tcnt--; break; } } } if (tcnt == ccnt) return; /* no change; no new flavors */ msec = kmem_zalloc(tcnt * sizeof (struct secinfo), KM_SLEEP); /* move current secinfo list data to the new list */ for (c = 0; c < ccnt; c++) { bcopy(&curdata->ex_secinfo[c], &msec[c], sizeof (struct secinfo)); } /* Add the flavor that's not in the current data */ mcnt = ccnt; for (n = 0; n < ncnt; n++) { for (c = 0; c < ccnt; c++) { if (newsecinfo[n].s_secinfo.sc_nfsnum == curdata->ex_secinfo[c].s_secinfo.sc_nfsnum) break; } /* This is the one. Add it. */ if (c == ccnt) { srv_secinfo_copy(&newsecinfo[n], &msec[mcnt]); if (curdata->ex_flags & EX_PSEUDO) msec[mcnt].s_flags = M_RO; mcnt++; } } ASSERT(mcnt == tcnt); /* * Done. Update curdata. * Free up the existing secinfo list in curdata and * set the new value. */ if (ccnt > 0) kmem_free(curdata->ex_secinfo, ccnt * sizeof (struct secinfo)); curdata->ex_seccnt = tcnt; curdata->ex_secinfo = msec; } /* * For NFS V4. * Remove the security data of the unexported node from its ancestors. * Assume there is at least one flavor entry in the current data, curdata. * * This routine is used under the protection of exported_lock (RW_WRITER). */ void srv_secinfo_remove(struct exportdata *curdata, struct secinfo *remsecinfo, int rcnt) { int ccnt, c; /* sec count in current data - curdata */ int r; /* sec count in removal data - remsecinfo */ int tcnt, mcnt; /* total sec count after removing */ struct secinfo *msec; /* final secinfo list after removing */ ASSERT(curdata->ex_seccnt > 0); ccnt = curdata->ex_seccnt; tcnt = ccnt; for (r = 0; r < rcnt; r++) { if (SEC_REF_EXPORTED(&remsecinfo[r])) { /* * Remove a flavor only if the flavor was a shared flavor for * the remsecinfo exported node that's being unshared. * Otherwise, this flavor is for the children of remsecinfo, * need to keep it. */ for (c = 0; c < ccnt; c++) { if (remsecinfo[r].s_secinfo.sc_nfsnum == curdata->ex_secinfo[c].s_secinfo.sc_nfsnum) { /* * Decrement secinfo reference count by 1. * If this entry is invalid after decrementing * the count (i.e. count < 1), this entry will * be removed. */ curdata->ex_secinfo[c].s_refcnt--; ASSERT(curdata->ex_secinfo[c].s_refcnt >= 0); if (SEC_REF_INVALID(&curdata->ex_secinfo[c])) tcnt--; break; } } } } ASSERT(tcnt >= 0); if (tcnt == ccnt) return; /* no change; no flavors to remove */ if (tcnt == 0) { srv_secinfo_list_free(curdata->ex_secinfo, ccnt); curdata->ex_seccnt = 0; curdata->ex_secinfo = NULL; return; } msec = kmem_zalloc(tcnt * sizeof (struct secinfo), KM_SLEEP); /* walk thru the given secinfo list to remove the flavors */ mcnt = 0; for (c = 0; c < ccnt; c++) { if (SEC_REF_INVALID(&curdata->ex_secinfo[c])) { srv_secinfo_entry_free(&curdata->ex_secinfo[c]); } else { bcopy(&curdata->ex_secinfo[c], &msec[mcnt], sizeof (struct secinfo)); mcnt++; } } ASSERT(mcnt == tcnt); /* * Done. Update curdata. * Free the existing secinfo list in curdata. All pointers * within the list have either been moved to msec or freed * if it's invalid. */ kmem_free(curdata->ex_secinfo, ccnt * sizeof (struct secinfo)); curdata->ex_seccnt = tcnt; curdata->ex_secinfo = msec; } /* * Upon re-sharing an export node, if there is more than 1 export reference * to an old flavor (i.e. some of its children shared with this flavor), this * flavor information needs to be transfered to the new shared node. * * Expect at least 1 secinfo entry in the old shared node - olddata. * Expect both curdata and olddata are not pseudo nodes. * * This routine is used under the protection of exported_lock (RW_WRITER). */ void srv_secinfo_exp2exp(struct exportdata *curdata, struct secinfo *oldsecinfo, int ocnt) { int ccnt, c; /* sec count in current data - curdata */ int o; /* sec count in old data - oldsecinfo */ int tcnt, mcnt; /* total sec count after the transfer */ struct secinfo *msec; /* merged secinfo list */ ccnt = curdata->ex_seccnt; ASSERT(ocnt > 0); ASSERT(!(curdata->ex_flags & EX_PSEUDO)); /* * If the oldsecinfo has flavors with more than 1 reference count, * transfer the information to the curdata. */ tcnt = ccnt + ocnt; for (o = 0; o < ocnt; o++) { if (SEC_REF_SELF(&oldsecinfo[o])) { tcnt--; } else { for (c = 0; c < ccnt; c++) { if (oldsecinfo[o].s_secinfo.sc_nfsnum == curdata->ex_secinfo[c].s_secinfo.sc_nfsnum) { /* add old reference to the current secinfo count */ curdata->ex_secinfo[c].s_refcnt += oldsecinfo[o].s_refcnt; /* delete the old export flavor reference */ if (SEC_REF_EXPORTED(&oldsecinfo[o])) curdata->ex_secinfo[c].s_refcnt--; ASSERT(curdata->ex_secinfo[c].s_refcnt >= 0); tcnt--; break; } } } } if (tcnt == ccnt) return; /* no more transfer to do */ /* * oldsecinfo has flavors refered by its children that are not * in the current (new) export flavor list. Add these flavors. */ msec = kmem_zalloc(tcnt * sizeof (struct secinfo), KM_SLEEP); /* move current secinfo list data to the new list */ for (c = 0; c < ccnt; c++) { bcopy(&curdata->ex_secinfo[c], &msec[c], sizeof (struct secinfo)); } /* * Add the flavor that's not in the new export, but still * referred by its children. */ mcnt = ccnt; for (o = 0; o < ocnt; o++) { if (! SEC_REF_SELF(&oldsecinfo[o])) { for (c = 0; c < ccnt; c++) { if (oldsecinfo[o].s_secinfo.sc_nfsnum == curdata->ex_secinfo[c].s_secinfo.sc_nfsnum) break; } /* * This is the one. Add it. Decrement the reference count * by 1 if the flavor is an explicitly shared flavor for * the oldsecinfo export node. */ if (c == ccnt) { srv_secinfo_copy(&oldsecinfo[o], &msec[mcnt]); if (SEC_REF_EXPORTED(&oldsecinfo[o])) msec[mcnt].s_refcnt--; ASSERT(msec[mcnt].s_refcnt >= 0); mcnt++; } } } ASSERT(mcnt == tcnt); /* * Done. Update curdata. * Free up the existing secinfo list in curdata and * set the new value. */ if (ccnt > 0) kmem_free(curdata->ex_secinfo, ccnt * sizeof (struct secinfo)); curdata->ex_seccnt = tcnt; curdata->ex_secinfo = msec; } /* * When unsharing an old export node and the old node becomes a pseudo node, * if there is more than 1 export reference to an old flavor (i.e. some of * its children shared with this flavor), this flavor information needs to * be transfered to the new shared node. * * This routine is used under the protection of exported_lock (RW_WRITER). */ void srv_secinfo_exp2pseu(struct exportdata *curdata, struct exportdata *olddata) { int ocnt, o; /* sec count in transfer data - trandata */ int tcnt, mcnt; /* total sec count after transfer */ struct secinfo *msec; /* merged secinfo list */ ASSERT(curdata->ex_flags & EX_PSEUDO); ASSERT(curdata->ex_seccnt == 0); ocnt = olddata->ex_seccnt; /* * If the olddata has flavors with more than 1 reference count, * transfer the information to the curdata. */ tcnt = ocnt; for (o = 0; o < ocnt; o++) { if (SEC_REF_SELF(&olddata->ex_secinfo[o])) tcnt--; } if (tcnt == 0) return; /* no transfer to do */ msec = kmem_zalloc(tcnt * sizeof (struct secinfo), KM_SLEEP); mcnt = 0; for (o = 0; o < ocnt; o++) { if (! SEC_REF_SELF(&olddata->ex_secinfo[o])) { /* * Decrement the reference count by 1 if the flavor is * an explicitly shared flavor for the olddata export node. */ srv_secinfo_copy(&olddata->ex_secinfo[o], &msec[mcnt]); msec[mcnt].s_flags = M_RO; /* for a pseudo node */ if (SEC_REF_EXPORTED(&olddata->ex_secinfo[o])) msec[mcnt].s_refcnt--; ASSERT(msec[mcnt].s_refcnt >= 0); mcnt++; } } ASSERT(mcnt == tcnt); /* * Done. Update curdata. * Free up the existing secinfo list in curdata and * set the new value. */ curdata->ex_seccnt = tcnt; curdata->ex_secinfo = msec; } /* * For NFS V4. * Add or remove the newly exported or unexported security flavors of the * given exportinfo from its ancestors upto the system root. */ int srv_secinfo_treeclimb(struct exportinfo *exip, bool_t isadd, struct secinfo *exsecinfo, int exseccnt) { vnode_t *dvp, *vp; fid_t fid; int error = 0; int exportdir; struct exportinfo *exi; ASSERT(RW_WRITE_HELD(&exported_lock)); if (exseccnt == 0) return (0); vp = exip->exi_vp; VN_HOLD(vp); exportdir = 1; for (;;) { bzero(&fid, sizeof (fid)); fid.fid_len = MAXFIDSZ; error = vop_fid_pseudo(vp, &fid); if (error) break; if (! exportdir) { exi = checkexport4(&vp->v_vfsp->vfs_fsid, &fid, vp); if (exi != NULL) { if (isadd) { /* * Add the new security flavors to the * export entry of the current directory. */ srv_secinfo_add(&exi->exi_export, exsecinfo, exseccnt); } else { /* * Remove the unexported secinfo entries. */ srv_secinfo_remove(&exi->exi_export, exsecinfo, exseccnt); } } } /* * If at the root of the filesystem, need * to traverse across the mountpoint * and continue the climb on the mounted-on * filesystem. */ if (vp->v_flag & VROOT) { if (VN_CMP(vp, rootdir)) { /* at system root */ break; } vp = untraverse(vp); exportdir = 0; continue; } /* * Now, do a ".." to find parent dir of vp. */ error = VOP_LOOKUP(vp, "..", &dvp, NULL, 0, NULL, CRED()); if (error == ENOTDIR && exportdir) { dvp = exip->exi_dvp; ASSERT(dvp != NULL); VN_HOLD(dvp); error = 0; } if (error) break; exportdir = 0; VN_RELE(vp); vp = dvp; } VN_RELE(vp); return (error); } void export_link(struct exportinfo *exi) { int exporthash; exporthash = exptablehash(&exi->exi_fsid, &exi->exi_fid); exi->exi_hash = exptable[exporthash]; exptable[exporthash] = exi; } /* * Initialization routine for export routines. Should only be called once. */ int nfs_exportinit(void) { int error; rw_init(&exported_lock, NULL, RW_DEFAULT, NULL); /* * Allocate the place holder for the public file handle, which * is all zeroes. It is initially set to the root filesystem. */ exi_root = kmem_zalloc(sizeof (*exi_root), KM_SLEEP); exi_public = exi_root; exi_root->exi_export.ex_flags = EX_PUBLIC; exi_root->exi_export.ex_pathlen = 2; /* length of "/" */ exi_root->exi_export.ex_path = kmem_alloc(exi_root->exi_export.ex_pathlen, KM_SLEEP); exi_root->exi_export.ex_path[0] = '/'; exi_root->exi_export.ex_path[1] = '\0'; exi_root->exi_count = 1; mutex_init(&exi_root->exi_lock, NULL, MUTEX_DEFAULT, NULL); exi_root->exi_vp = rootdir; exi_rootfid.fid_len = MAXFIDSZ; error = vop_fid_pseudo(exi_root->exi_vp, &exi_rootfid); if (error) { mutex_destroy(&exi_root->exi_lock); kmem_free(exi_root, sizeof (*exi_root)); return (error); } /* setup the fhandle template */ exi_root->exi_fh.fh_fsid = rootdir->v_vfsp->vfs_fsid; exi_root->exi_fh.fh_xlen = exi_rootfid.fid_len; bcopy(exi_rootfid.fid_data, exi_root->exi_fh.fh_xdata, exi_rootfid.fid_len); exi_root->exi_fh.fh_len = sizeof (exi_root->exi_fh.fh_data); /* * Publish the exportinfo in the hash table */ export_link(exi_root); nfslog_init(); return (0); } /* * Finalization routine for export routines. Called to cleanup previoulsy * initializtion work when the NFS server module could not be loaded correctly. */ void nfs_exportfini(void) { /* * Deallocate the place holder for the public file handle. */ srv_secinfo_list_free(exi_root->exi_export.ex_secinfo, exi_root->exi_export.ex_seccnt); mutex_destroy(&exi_root->exi_lock); kmem_free(exi_root, sizeof (*exi_root)); rw_destroy(&exported_lock); } /* * Check if 2 gss mechanism identifiers are the same. * * return FALSE if not the same. * return TRUE if the same. */ static bool_t nfs_mech_equal(rpc_gss_OID mech1, rpc_gss_OID mech2) { if ((mech1->length == 0) && (mech2->length == 0)) return (TRUE); if (mech1->length != mech2->length) return (FALSE); return (bcmp(mech1->elements, mech2->elements, mech1->length) == 0); } /* * This routine is used by rpc to map rpc security number * to nfs specific security flavor number. * * The gss callback prototype is * callback(struct svc_req *, gss_cred_id_t *, gss_ctx_id_t *, * rpc_gss_lock_t *, void **), * since nfs does not use the gss_cred_id_t/gss_ctx_id_t arguments * we cast them to void. */ /*ARGSUSED*/ bool_t rfs_gsscallback(struct svc_req *req, gss_cred_id_t deleg, void *gss_context, rpc_gss_lock_t *lock, void **cookie) { int i, j; rpc_gss_rawcred_t *raw_cred; struct exportinfo *exi; /* * We don't deal with delegated credentials. */ if (deleg != GSS_C_NO_CREDENTIAL) return (FALSE); raw_cred = lock->raw_cred; *cookie = NULL; rw_enter(&exported_lock, RW_READER); for (i = 0; i < EXPTABLESIZE; i++) { exi = exptable[i]; while (exi) { if (exi->exi_export.ex_seccnt > 0) { struct secinfo *secp; secp = exi->exi_export.ex_secinfo; for (j = 0; j < exi->exi_export.ex_seccnt; j++) { /* * If there is a map of the triplet * (mechanism, service, qop) between raw_cred and * the exported flavor, get the psudo flavor number. * Also qop should not be NULL, it should be "default" * or something else. */ if ((secp[j].s_secinfo.sc_rpcnum == RPCSEC_GSS) && (nfs_mech_equal(secp[j].s_secinfo.sc_gss_mech_type, raw_cred->mechanism)) && (secp[j].s_secinfo.sc_service == raw_cred->service) && (raw_cred->qop == secp[j].s_secinfo.sc_qop)) { *cookie = (void *)(uintptr_t) secp[j].s_secinfo.sc_nfsnum; goto done; } } } exi = exi->exi_hash; } } done: rw_exit(&exported_lock); /* * If no nfs pseudo number mapping can be found in the export * table, assign the nfsflavor to NFS_FLAVOR_NOMAP. In V4, we may * recover the flavor mismatch from NFS layer (NFS4ERR_WRONGSEC). * * For example: * server first shares with krb5i; * client mounts with krb5i; * server re-shares with krb5p; * client tries with krb5i, but no mapping can be found; * rpcsec_gss module calls this routine to do the mapping, * if this routine fails, request is rejected from * the rpc layer. * What we need is to let the nfs layer rejects the request. * For V4, we can reject with NFS4ERR_WRONGSEC and the client * may recover from it by getting the new flavor via SECINFO. * * nfs pseudo number for RPCSEC_GSS mapping (see nfssec.conf) * is owned by IANA (see RFC 2623). * * XXX NFS_FLAVOR_NOMAP is defined in Solaris to work around * the implementation issue. This number should not overlap with * any new IANA defined pseudo flavor numbers. */ if (*cookie == NULL) *cookie = (void *)NFS_FLAVOR_NOMAP; lock->locked = TRUE; return (TRUE); } /* * Exportfs system call; credentials should be checked before * calling this function. */ int exportfs(struct exportfs_args *args, model_t model, cred_t *cr) { vnode_t *vp; vnode_t *dvp; struct exportdata *kex; /* kernel space exportdata */ struct exportinfo *exi; struct exportinfo *ex, *prev; fid_t fid; fsid_t fsid; int error; size_t allocsize; struct secinfo *sp; struct secinfo *exs; rpc_gss_callback_t cb; char *pathbuf; char *log_buffer; char *tagbuf; int callback; int allocd_seccnt; STRUCT_HANDLE(exportfs_args, uap); STRUCT_DECL(exportdata, uexi); struct secinfo suniq[MAX_FLAVORS]; /* no duplicate flavors */ int32_t suniqcnt; /* ex_seccnt for suniq */ struct secinfo suniqex[MAX_FLAVORS]; /* no duplicate flavors */ int32_t suniqcntex; /* ex_seccnt for suniq */ int i; STRUCT_SET_HANDLE(uap, model, args); error = lookupname(STRUCT_FGETP(uap, dname), UIO_USERSPACE, FOLLOW, &dvp, &vp); if (error == EINVAL) { /* * if fname resolves to / we get EINVAL error * since we wanted the parent vnode. Try again * with NULL dvp. */ error = lookupname(STRUCT_FGETP(uap, dname), UIO_USERSPACE, FOLLOW, NULL, &vp); dvp = NULL; } if (!error && vp == NULL) { /* * Last component of fname not found */ if (dvp != NULL) { VN_RELE(dvp); } error = ENOENT; } if (error) return (error); /* * 'vp' may be an AUTOFS node, so we perform a * VOP_ACCESS() to trigger the mount of the * intended filesystem, so we can share the intended * filesystem instead of the AUTOFS filesystem. */ (void) VOP_ACCESS(vp, 0, 0, cr); /* * We're interested in the top most filesystem. * This is specially important when uap->dname is a trigger * AUTOFS node, since we're really interested in sharing the * filesystem AUTOFS mounted as result of the VOP_ACCESS() * call not the AUTOFS node itself. */ if (vn_mountedvfs(vp) != NULL) { if (error = traverse(&vp)) { VN_RELE(vp); if (dvp != NULL) VN_RELE(dvp); return (error); } } /* * Get the vfs id */ bzero(&fid, sizeof (fid)); fid.fid_len = MAXFIDSZ; error = VOP_FID(vp, &fid); fsid = vp->v_vfsp->vfs_fsid; if (error) { VN_RELE(vp); if (dvp != NULL) VN_RELE(dvp); /* * If VOP_FID returns ENOSPC then the fid supplied * is too small. For now we simply return EREMOTE. */ if (error == ENOSPC) error = EREMOTE; return (error); } if (STRUCT_FGETP(uap, uex) == NULL) { error = unexport(&fsid, &fid, vp); VN_RELE(vp); if (dvp != NULL) VN_RELE(dvp); return (error); } exi = kmem_zalloc(sizeof (*exi), KM_SLEEP); exi->exi_fsid = fsid; exi->exi_fid = fid; exi->exi_vp = vp; exi->exi_count = 1; exi->exi_volatile_dev = (vfssw[vp->v_vfsp->vfs_fstype].vsw_flag & VSW_VOLATILEDEV) ? 1 : 0; mutex_init(&exi->exi_lock, NULL, MUTEX_DEFAULT, NULL); exi->exi_dvp = dvp; /* * Initialize auth cache lock */ rw_init(&exi->exi_cache_lock, NULL, RW_DEFAULT, NULL); /* * Build up the template fhandle */ exi->exi_fh.fh_fsid = fsid; if (exi->exi_fid.fid_len > sizeof (exi->exi_fh.fh_xdata)) { error = EREMOTE; goto out1; } exi->exi_fh.fh_xlen = exi->exi_fid.fid_len; bcopy(exi->exi_fid.fid_data, exi->exi_fh.fh_xdata, exi->exi_fid.fid_len); exi->exi_fh.fh_len = sizeof (exi->exi_fh.fh_data); kex = &exi->exi_export; /* * Load in everything, and do sanity checking */ STRUCT_INIT(uexi, model); if (copyin(STRUCT_FGETP(uap, uex), STRUCT_BUF(uexi), STRUCT_SIZE(uexi))) { error = EFAULT; goto out1; } kex->ex_version = STRUCT_FGET(uexi, ex_version); if (kex->ex_version != EX_CURRENT_VERSION) { error = EINVAL; cmn_err(CE_WARN, "NFS: exportfs requires export struct version 2 - got %d\n", kex->ex_version); goto out1; } /* * Must have at least one security entry */ kex->ex_seccnt = STRUCT_FGET(uexi, ex_seccnt); if (kex->ex_seccnt < 1) { error = EINVAL; goto out1; } kex->ex_path = STRUCT_FGETP(uexi, ex_path); kex->ex_pathlen = STRUCT_FGET(uexi, ex_pathlen); kex->ex_flags = STRUCT_FGET(uexi, ex_flags); kex->ex_anon = STRUCT_FGET(uexi, ex_anon); kex->ex_secinfo = STRUCT_FGETP(uexi, ex_secinfo); kex->ex_index = STRUCT_FGETP(uexi, ex_index); kex->ex_log_buffer = STRUCT_FGETP(uexi, ex_log_buffer); kex->ex_log_bufferlen = STRUCT_FGET(uexi, ex_log_bufferlen); kex->ex_tag = STRUCT_FGETP(uexi, ex_tag); kex->ex_taglen = STRUCT_FGET(uexi, ex_taglen); /* * Copy the exported pathname into * an appropriately sized buffer. */ pathbuf = kmem_alloc(MAXPATHLEN, KM_SLEEP); if (copyinstr(kex->ex_path, pathbuf, MAXPATHLEN, &kex->ex_pathlen)) { kmem_free(pathbuf, MAXPATHLEN); error = EFAULT; goto out1; } kex->ex_path = kmem_alloc(kex->ex_pathlen + 1, KM_SLEEP); bcopy(pathbuf, kex->ex_path, kex->ex_pathlen); kex->ex_path[kex->ex_pathlen] = '\0'; kmem_free(pathbuf, MAXPATHLEN); /* * Get the path to the logging buffer and the tag */ if (kex->ex_flags & EX_LOG) { log_buffer = kmem_alloc(MAXPATHLEN, KM_SLEEP); if (copyinstr(kex->ex_log_buffer, log_buffer, MAXPATHLEN, &kex->ex_log_bufferlen)) { kmem_free(log_buffer, MAXPATHLEN); error = EFAULT; goto out2; } kex->ex_log_buffer = kmem_alloc(kex->ex_log_bufferlen + 1, KM_SLEEP); bcopy(log_buffer, kex->ex_log_buffer, kex->ex_log_bufferlen); kex->ex_log_buffer[kex->ex_log_bufferlen] = '\0'; kmem_free(log_buffer, MAXPATHLEN); tagbuf = kmem_alloc(MAXPATHLEN, KM_SLEEP); if (copyinstr(kex->ex_tag, tagbuf, MAXPATHLEN, &kex->ex_taglen)) { kmem_free(tagbuf, MAXPATHLEN); error = EFAULT; goto out3; } kex->ex_tag = kmem_alloc(kex->ex_taglen + 1, KM_SLEEP); bcopy(tagbuf, kex->ex_tag, kex->ex_taglen); kex->ex_tag[kex->ex_taglen] = '\0'; kmem_free(tagbuf, MAXPATHLEN); } /* * Load the security information for each flavor */ allocsize = kex->ex_seccnt * SIZEOF_STRUCT(secinfo, model); sp = kmem_zalloc(allocsize, KM_SLEEP); if (copyin(kex->ex_secinfo, sp, allocsize)) { kmem_free(sp, allocsize); error = EFAULT; goto out4; } /* * All of these nested structures need to be converted to * the kernel native format. */ if (model != DATAMODEL_NATIVE) { size_t allocsize2; struct secinfo *sp2; allocsize2 = kex->ex_seccnt * sizeof (struct secinfo); sp2 = kmem_zalloc(allocsize2, KM_SLEEP); for (i = 0; i < kex->ex_seccnt; i++) { STRUCT_HANDLE(secinfo, usi); STRUCT_SET_HANDLE(usi, model, (struct secinfo *)((caddr_t)sp + (i * SIZEOF_STRUCT(secinfo, model)))); bcopy(STRUCT_FGET(usi, s_secinfo.sc_name), sp2[i].s_secinfo.sc_name, MAX_NAME_LEN); sp2[i].s_secinfo.sc_nfsnum = STRUCT_FGET(usi, s_secinfo.sc_nfsnum); sp2[i].s_secinfo.sc_rpcnum = STRUCT_FGET(usi, s_secinfo.sc_rpcnum); bcopy(STRUCT_FGET(usi, s_secinfo.sc_gss_mech), sp2[i].s_secinfo.sc_gss_mech, MAX_NAME_LEN); sp2[i].s_secinfo.sc_gss_mech_type = STRUCT_FGETP(usi, s_secinfo.sc_gss_mech_type); sp2[i].s_secinfo.sc_qop = STRUCT_FGET(usi, s_secinfo.sc_qop); sp2[i].s_secinfo.sc_service = STRUCT_FGET(usi, s_secinfo.sc_service); sp2[i].s_flags = STRUCT_FGET(usi, s_flags); sp2[i].s_window = STRUCT_FGET(usi, s_window); sp2[i].s_rootcnt = STRUCT_FGET(usi, s_rootcnt); sp2[i].s_rootnames = STRUCT_FGETP(usi, s_rootnames); } kmem_free(sp, allocsize); sp = sp2; allocsize = allocsize2; } kex->ex_secinfo = sp; /* * And now copy rootnames for each individual secinfo. */ callback = 0; allocd_seccnt = 0; while (allocd_seccnt < kex->ex_seccnt) { exs = &sp[allocd_seccnt]; if (exs->s_rootcnt > 0) { if (!sec_svc_loadrootnames(exs->s_secinfo.sc_rpcnum, exs->s_rootcnt, &exs->s_rootnames, model)) { error = EFAULT; goto out5; } } if (exs->s_secinfo.sc_rpcnum == RPCSEC_GSS) { rpc_gss_OID mech_tmp; STRUCT_DECL(rpc_gss_OID_s, umech_tmp); caddr_t elements_tmp; /* Copyin mechanism type */ STRUCT_INIT(umech_tmp, model); mech_tmp = kmem_alloc(sizeof (*mech_tmp), KM_SLEEP); if (copyin(exs->s_secinfo.sc_gss_mech_type, STRUCT_BUF(umech_tmp), STRUCT_SIZE(umech_tmp))) { kmem_free(mech_tmp, sizeof (*mech_tmp)); error = EFAULT; goto out5; } mech_tmp->length = STRUCT_FGET(umech_tmp, length); mech_tmp->elements = STRUCT_FGETP(umech_tmp, elements); elements_tmp = kmem_alloc(mech_tmp->length, KM_SLEEP); if (copyin(mech_tmp->elements, elements_tmp, mech_tmp->length)) { kmem_free(elements_tmp, mech_tmp->length); kmem_free(mech_tmp, sizeof (*mech_tmp)); error = EFAULT; goto out5; } mech_tmp->elements = elements_tmp; exs->s_secinfo.sc_gss_mech_type = mech_tmp; allocd_seccnt++; callback = 1; } else allocd_seccnt++; } /* * Init the secinfo reference count and mark these flavors * explicitly exported flavors. */ for (i = 0; i < kex->ex_seccnt; i++) { kex->ex_secinfo[i].s_flags |= M_4SEC_EXPORTED; kex->ex_secinfo[i].s_refcnt++; /* 1 reference count */ } /* * Set up rpcsec_gss callback routine entry if any. */ if (callback) { cb.callback = rfs_gsscallback; cb.program = NFS_ACL_PROGRAM; for (cb.version = NFS_ACL_VERSMIN; cb.version <= NFS_ACL_VERSMAX; cb.version++) { (void) sec_svc_control(RPC_SVC_SET_GSS_CALLBACK, (void *)&cb); } cb.program = NFS_PROGRAM; for (cb.version = NFS_VERSMIN; cb.version <= NFS_VERSMAX; cb.version++) { (void) sec_svc_control(RPC_SVC_SET_GSS_CALLBACK, (void *)&cb); } } /* * Check the index flag. Do this here to avoid holding the * lock while dealing with the index option (as we do with * the public option). */ if (kex->ex_flags & EX_INDEX) { if (!kex->ex_index) { /* sanity check */ error = EINVAL; goto out5; } if (error = loadindex(kex)) goto out5; } if (kex->ex_flags & EX_LOG) { if (error = nfslog_setup(exi)) goto out6; } /* * Insert the new entry at the front of the export list */ rw_enter(&exported_lock, RW_WRITER); export_link(exi); /* * Check the rest of the list for an old entry for the fs. * If one is found then unlink it, wait until this is the * only reference and then free it. */ prev = exi; for (ex = prev->exi_hash; ex != NULL; prev = ex, ex = ex->exi_hash) { if (ex != exi_root && VN_CMP(ex->exi_vp, vp)) { prev->exi_hash = ex->exi_hash; break; } } /* * If the public filehandle is pointing at the * old entry, then point it back at the root. */ if (ex != NULL && ex == exi_public) exi_public = exi_root; /* * If the public flag is on, make the global exi_public * point to this entry and turn off the public bit so that * we can distinguish it from the place holder export. */ if (kex->ex_flags & EX_PUBLIC) { exi_public = exi; kex->ex_flags &= ~EX_PUBLIC; } #ifdef VOLATILE_FH_TEST /* * Set up the volatile_id value if volatile on share. * The list of volatile renamed filehandles is always destroyed, * if the fs was reshared. */ if (kex->ex_flags & EX_VOLFH) exi->exi_volatile_id = gethrestime_sec(); mutex_init(&exi->exi_vol_rename_lock, NULL, MUTEX_DEFAULT, NULL); #endif /* VOLATILE_FH_TEST */ /* * If this is a new export, then climb up * the tree and check if any pseudo exports * need to be created to provide a path for * NFS v4 clients. */ if (ex == NULL) error = treeclimb_export(exi); /* * By this time all the kernel memory is allocated and we can * build a unique flavor list. */ suniqcnt = build_seclist_nodups(&exi->exi_export, suniq); if (!error) error = srv_secinfo_treeclimb(exi, TRUE, suniq, suniqcnt); /* * If re-sharing an old export entry, update the secinfo data * depending on if the old entry is a pseudo node or not. */ if (!error && ex != NULL) { suniqcntex = build_seclist_nodups(&ex->exi_export, suniqex); if (PSEUDO(ex)) { srv_secinfo_add(&exi->exi_export, suniqex, suniqcntex); } else { srv_secinfo_exp2exp(&exi->exi_export, suniqex, suniqcntex); error = srv_secinfo_treeclimb(ex, FALSE, suniqex, suniqcntex); } } if (error) goto out7; /* * If it's a re-export and the old entry has a visible list, * then transfer its visible list to the new export. * Note: only VROOT node may have a visible list either * it is a PSEUDO node or a real export node. */ if (ex != NULL && (ex->exi_visible != NULL)) { exi->exi_visible = ex->exi_visible; ex->exi_visible = NULL; } rw_exit(&exported_lock); if (exi_public == exi || kex->ex_flags & EX_LOG) { /* * Log share operation to this buffer only. */ nfslog_share_record(exi, cr); } if (ex != NULL) exi_rele(ex); return (0); out7: /* * Cleaning up the tree. Assuming *treeclimb* routines * will fail at the same place in the tree. */ (void) treeclimb_unexport(exi); (void) srv_secinfo_treeclimb(exi, FALSE, suniq, suniqcnt); /* * Unlink and re-link the new and old export in exptable. */ (void) export_unlink(&exi->exi_fsid, &exi->exi_fid, exi->exi_vp, NULL); if (ex != NULL) export_link(ex); rw_exit(&exported_lock); out6: if (kex->ex_flags & EX_INDEX) kmem_free(kex->ex_index, strlen(kex->ex_index) + 1); out5: /* free partially completed allocation */ while (--allocd_seccnt >= 0) { exs = &kex->ex_secinfo[allocd_seccnt]; srv_secinfo_entry_free(exs); } if (kex->ex_secinfo) { kmem_free(kex->ex_secinfo, kex->ex_seccnt * sizeof (struct secinfo)); } out4: if ((kex->ex_flags & EX_LOG) && kex->ex_tag != NULL) kmem_free(kex->ex_tag, kex->ex_taglen + 1); out3: if ((kex->ex_flags & EX_LOG) && kex->ex_log_buffer != NULL) kmem_free(kex->ex_log_buffer, kex->ex_log_bufferlen + 1); out2: kmem_free(kex->ex_path, kex->ex_pathlen + 1); out1: VN_RELE(vp); if (dvp != NULL) VN_RELE(dvp); mutex_destroy(&exi->exi_lock); rw_destroy(&exi->exi_cache_lock); kmem_free(exi, sizeof (*exi)); return (error); } /* * Remove the exportinfo from the export list */ int export_unlink(fsid_t *fsid, fid_t *fid, vnode_t *vp, struct exportinfo **exip) { struct exportinfo **tail; ASSERT(RW_WRITE_HELD(&exported_lock)); tail = &exptable[exptablehash(fsid, fid)]; while (*tail != NULL) { if (exportmatch(*tail, fsid, fid)) { /* * If vp is given, check if vp is the * same vnode as the exported node. * * Since VOP_FID of a lofs node returns the * fid of its real node (ufs), the exported * node for lofs and (pseudo) ufs may have * the same fsid and fid. */ if (vp == NULL || vp == (*tail)->exi_vp) { if (exip != NULL) *exip = *tail; *tail = (*tail)->exi_hash; return (0); } } tail = &(*tail)->exi_hash; } return (EINVAL); } /* * Unexport an exported filesystem */ int unexport(fsid_t *fsid, fid_t *fid, vnode_t *vp) { struct exportinfo *exi = NULL; int error; struct secinfo suniq[MAX_FLAVORS]; int32_t suniqcnt; rw_enter(&exported_lock, RW_WRITER); error = export_unlink(fsid, fid, vp, &exi); if (error) { rw_exit(&exported_lock); return (error); } /* pseudo node is not a real exported filesystem */ if (PSEUDO(exi)) { /* * Put the pseudo node back into the export table * before erroring out. */ export_link(exi); rw_exit(&exported_lock); return (EINVAL); } /* * If there's a visible list, then need to leave * a pseudo export here to retain the visible list * for paths to exports below. */ if (exi->exi_visible) { error = pseudo_exportfs(exi->exi_vp, exi->exi_visible, &exi->exi_export); if (error) goto done; exi->exi_visible = NULL; } else { error = treeclimb_unexport(exi); if (error) goto done; } suniqcnt = build_seclist_nodups(&exi->exi_export, suniq); error = srv_secinfo_treeclimb(exi, FALSE, suniq, suniqcnt); if (error) goto done; rw_exit(&exported_lock); /* * Need to call into the NFSv4 server and release all data * held on this particular export. This is important since * the v4 server may be holding file locks or vnodes under * this export. */ rfs4_clean_state_exi(exi); /* * Notify the lock manager that the filesystem is being * unexported. */ lm_unexport(exi); /* * If this was a public export, restore * the public filehandle to the root. */ if (exi == exi_public) { exi_public = exi_root; nfslog_share_record(exi_public, CRED()); } if (exi->exi_export.ex_flags & EX_LOG) { nfslog_unshare_record(exi, CRED()); } exi_rele(exi); return (error); done: rw_exit(&exported_lock); exi_rele(exi); return (error); } /* * Get file handle system call. * Takes file name and returns a file handle for it. * Credentials must be verified before calling. */ int nfs_getfh(struct nfs_getfh_args *args, model_t model, cred_t *cr) { nfs_fh3 fh; char buf[NFS3_MAXFHSIZE]; char *logptr, logbuf[NFS3_MAXFHSIZE]; int l = NFS3_MAXFHSIZE; vnode_t *vp; vnode_t *dvp; struct exportinfo *exi; int error; int vers; STRUCT_HANDLE(nfs_getfh_args, uap); #ifdef lint model = model; /* STRUCT macros don't always use it */ #endif STRUCT_SET_HANDLE(uap, model, args); error = lookupname(STRUCT_FGETP(uap, fname), UIO_USERSPACE, FOLLOW, &dvp, &vp); if (error == EINVAL) { /* * if fname resolves to / we get EINVAL error * since we wanted the parent vnode. Try again * with NULL dvp. */ error = lookupname(STRUCT_FGETP(uap, fname), UIO_USERSPACE, FOLLOW, NULL, &vp); dvp = NULL; } if (!error && vp == NULL) { /* * Last component of fname not found */ if (dvp != NULL) { VN_RELE(dvp); } error = ENOENT; } if (error) return (error); /* * 'vp' may be an AUTOFS node, so we perform a * VOP_ACCESS() to trigger the mount of the * intended filesystem, so we can share the intended * filesystem instead of the AUTOFS filesystem. */ (void) VOP_ACCESS(vp, 0, 0, cr); /* * We're interested in the top most filesystem. * This is specially important when uap->dname is a trigger * AUTOFS node, since we're really interested in sharing the * filesystem AUTOFS mounted as result of the VOP_ACCESS() * call not the AUTOFS node itself. */ if (vn_mountedvfs(vp) != NULL) { if (error = traverse(&vp)) { VN_RELE(vp); if (dvp != NULL) VN_RELE(dvp); return (error); } } vers = STRUCT_FGET(uap, vers); exi = nfs_vptoexi(dvp, vp, cr, NULL, &error, FALSE); if (!error) { if (vers == NFS_VERSION) { error = makefh((fhandle_t *)buf, vp, exi); l = NFS_FHSIZE; logptr = buf; } else if (vers == NFS_V3) { int i, sz; error = makefh3(&fh, vp, exi); l = fh.fh3_length; logptr = logbuf; if (!error) { i = 0; sz = sizeof (fsid_t); bcopy(&fh.fh3_fsid, &buf[i], sz); i += sz; sz = sizeof (ushort_t); bcopy(&fh.fh3_len, &buf[i], sz); i += sz; sz = fh.fh3_len; bcopy(fh.fh3_data, &buf[i], sz); i += sz; sz = sizeof (ushort_t); bcopy(&fh.fh3_xlen, &buf[i], sz); i += sz; sz = fh.fh3_xlen; bcopy(fh.fh3_xdata, &buf[i], sz); i += sz; } /* * If we need to do NFS logging, the filehandle * must be downsized to 32 bytes. */ if (!error && exi->exi_export.ex_flags & EX_LOG) { i = 0; sz = sizeof (fsid_t); bcopy(&fh.fh3_fsid, &logbuf[i], sz); i += sz; sz = sizeof (ushort_t); bcopy(&fh.fh3_len, &logbuf[i], sz); i += sz; sz = NFS_FHMAXDATA; bcopy(fh.fh3_data, &logbuf[i], sz); i += sz; sz = sizeof (ushort_t); bcopy(&fh.fh3_xlen, &logbuf[i], sz); i += sz; sz = NFS_FHMAXDATA; bcopy(fh.fh3_xdata, &logbuf[i], sz); i += sz; } } if (!error && exi->exi_export.ex_flags & EX_LOG) { nfslog_getfh(exi, (fhandle_t *)logptr, STRUCT_FGETP(uap, fname), UIO_USERSPACE, cr); } exi_rele(exi); if (!error) { if (copyout(&l, STRUCT_FGETP(uap, lenp), sizeof (int))) error = EFAULT; if (copyout(buf, STRUCT_FGETP(uap, fhp), l)) error = EFAULT; } } VN_RELE(vp); if (dvp != NULL) { VN_RELE(dvp); } return (error); } /* * Strategy: if vp is in the export list, then * return the associated file handle. Otherwise, ".." * once up the vp and try again, until the root of the * filesystem is reached. */ struct exportinfo * nfs_vptoexi(vnode_t *dvp, vnode_t *vp, cred_t *cr, int *walk, int *err, bool_t v4srv) { fid_t fid; int error; struct exportinfo *exi; ASSERT(vp); VN_HOLD(vp); if (dvp != NULL) { VN_HOLD(dvp); } if (walk != NULL) *walk = 0; for (;;) { bzero(&fid, sizeof (fid)); fid.fid_len = MAXFIDSZ; error = vop_fid_pseudo(vp, &fid); if (error) { /* * If vop_fid_pseudo returns ENOSPC then the fid * supplied is too small. For now we simply * return EREMOTE. */ if (error == ENOSPC) error = EREMOTE; break; } if (v4srv) exi = checkexport4(&vp->v_vfsp->vfs_fsid, &fid, vp); else exi = checkexport(&vp->v_vfsp->vfs_fsid, &fid); if (exi != NULL) { /* * Found the export info */ break; } /* * We have just failed finding a matching export. * If we're at the root of this filesystem, then * it's time to stop (with failure). */ if (vp->v_flag & VROOT) { error = EINVAL; break; } if (walk != NULL) (*walk)++; /* * Now, do a ".." up vp. If dvp is supplied, use it, * otherwise, look it up. */ if (dvp == NULL) { error = VOP_LOOKUP(vp, "..", &dvp, NULL, 0, NULL, cr); if (error) break; } VN_RELE(vp); vp = dvp; dvp = NULL; } VN_RELE(vp); if (dvp != NULL) { VN_RELE(dvp); } if (error != 0) { if (err != NULL) *err = error; return (NULL); } return (exi); } bool_t chk_clnt_sec(struct exportinfo *exi, struct svc_req *req) { int i, nfsflavor; struct secinfo *sp; bool_t sec_found = FALSE; /* * Get the nfs flavor number from xprt. */ nfsflavor = (int)(uintptr_t)req->rq_xprt->xp_cookie; sp = exi->exi_export.ex_secinfo; for (i = 0; i < exi->exi_export.ex_seccnt; i++) { if (nfsflavor == sp[i].s_secinfo.sc_nfsnum) { sec_found = TRUE; break; } } return (sec_found); } /* * Make an fhandle from a vnode */ int makefh(fhandle_t *fh, vnode_t *vp, struct exportinfo *exi) { int error; *fh = exi->exi_fh; /* struct copy */ error = VOP_FID(vp, (fid_t *)&fh->fh_len); if (error) { /* * Should be something other than EREMOTE */ return (EREMOTE); } return (0); } /* * This routine makes an overloaded V2 fhandle which contains * sec modes. * * Note that the first four octets contain the length octet, * the status octet, and two padded octets to make them XDR * four-octet aligned. * * 1 2 3 4 32 * +---+---+---+---+---+---+---+---+ +---+---+---+---+ +---+ * | l | s | | | sec_1 |...| sec_n |...| | * +---+---+---+---+---+---+---+---+ +---+---+---+---+ +---+ * * where * * the status octet s indicates whether there are more security * flavors (1 means yes, 0 means no) that require the client to * perform another 0x81 LOOKUP to get them, * * the length octet l is the length describing the number of * valid octets that follow. (l = 4 * n, where n is the number * of security flavors sent in the current overloaded filehandle.) */ int makefh_ol(fhandle_t *fh, struct exportinfo *exi, uint_t sec_index) { static int max_cnt = (NFS_FHSIZE/sizeof (int)) - 1; int totalcnt, i, *ipt, cnt; char *c; if (fh == (fhandle_t *)NULL || exi == (struct exportinfo *)NULL || sec_index > exi->exi_export.ex_seccnt || sec_index < 1) return (EREMOTE); totalcnt = exi->exi_export.ex_seccnt-sec_index+1; cnt = totalcnt > max_cnt? max_cnt : totalcnt; c = (char *)fh; /* * Encode the length octet representing the number of * security flavors (in bytes) in this overloaded fh. */ *c = cnt * sizeof (int); /* * Encode the status octet that indicates whether there * are more security flavors the client needs to get. */ *(c+1) = totalcnt > max_cnt; /* * put security flavors in the overloaded fh */ ipt = (int *)(c + sizeof (int32_t)); for (i = 0; i < cnt; i++) { *ipt++ = htonl(exi->exi_export.ex_secinfo[i+sec_index-1]. s_secinfo.sc_nfsnum); } return (0); } /* * Make an nfs_fh3 from a vnode */ int makefh3(nfs_fh3 *fh, vnode_t *vp, struct exportinfo *exi) { int error; fid_t fid; bzero(&fid, sizeof (fid)); fid.fid_len = MAXFIDSZ; error = VOP_FID(vp, &fid); if (error) return (EREMOTE); bzero(fh, sizeof (nfs_fh3)); fh->fh3_fsid = exi->exi_fsid; fh->fh3_len = fid.fid_len; bcopy(fid.fid_data, fh->fh3_data, fh->fh3_len); fh->fh3_xlen = exi->exi_fid.fid_len; bcopy(exi->exi_fid.fid_data, fh->fh3_xdata, fh->fh3_xlen); fh->fh3_length = sizeof (fsid_t) + sizeof (ushort_t) + fh->fh3_len + sizeof (ushort_t) + fh->fh3_xlen; fh->fh3_flags = 0; return (0); } /* * This routine makes an overloaded V3 fhandle which contains * sec modes. * * 1 4 * +--+--+--+--+ * | len | * +--+--+--+--+ * up to 64 * +--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+--+--+ * |s | | | | sec_1 | sec_2 | ... | sec_n | * +--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+--+--+ * * len = 4 * (n+1), where n is the number of security flavors * sent in the current overloaded filehandle. * * the status octet s indicates whether there are more security * mechanisms (1 means yes, 0 means no) that require the client * to perform another 0x81 LOOKUP to get them. * * Three octets are padded after the status octet. */ int makefh3_ol(nfs_fh3 *fh, struct exportinfo *exi, uint_t sec_index) { static int max_cnt = NFS3_FHSIZE/sizeof (int) - 1; int totalcnt, cnt, *ipt, i; char *c; if (fh == (nfs_fh3 *)NULL || exi == (struct exportinfo *)NULL || sec_index > exi->exi_export.ex_seccnt || sec_index < 1) { return (EREMOTE); } totalcnt = exi->exi_export.ex_seccnt-sec_index+1; cnt = totalcnt > max_cnt? max_cnt : totalcnt; /* * Place the length in fh3_length representing the number * of security flavors (in bytes) in this overloaded fh. */ fh->fh3_flags = FH_WEBNFS; fh->fh3_length = (cnt+1) * sizeof (int32_t); c = (char *)&fh->fh3_u.nfs_fh3_i.fh3_i; /* * Encode the status octet that indicates whether there * are more security flavors the client needs to get. */ *c = totalcnt > max_cnt; /* * put security flavors in the overloaded fh */ ipt = (int *)(c + sizeof (int32_t)); for (i = 0; i < cnt; i++) { *(ipt+i) = htonl( exi->exi_export.ex_secinfo[i+sec_index-1].s_secinfo.sc_nfsnum); } return (0); } /* * Make an nfs_fh4 from a vnode */ int makefh4(nfs_fh4 *fh, vnode_t *vp, struct exportinfo *exi) { int error; nfs_fh4_fmt_t *fh_fmtp = (nfs_fh4_fmt_t *)fh->nfs_fh4_val; fid_t fid; bzero(&fid, sizeof (fid)); fid.fid_len = MAXFIDSZ; /* * vop_fid_pseudo() is used to set up NFSv4 namespace, so * use vop_fid_pseudo() here to get the fid instead of VOP_FID. */ error = vop_fid_pseudo(vp, &fid); if (error) return (error); fh->nfs_fh4_len = NFS_FH4_LEN; fh_fmtp->fh4_i.fhx_fsid = exi->exi_fh.fh_fsid; fh_fmtp->fh4_i.fhx_xlen = exi->exi_fh.fh_xlen; bzero(fh_fmtp->fh4_i.fhx_data, sizeof (fh_fmtp->fh4_i.fhx_data)); bzero(fh_fmtp->fh4_i.fhx_xdata, sizeof (fh_fmtp->fh4_i.fhx_xdata)); bcopy(exi->exi_fh.fh_xdata, fh_fmtp->fh4_i.fhx_xdata, exi->exi_fh.fh_xlen); fh_fmtp->fh4_len = fid.fid_len; ASSERT(fid.fid_len <= sizeof (fh_fmtp->fh4_data)); bcopy(fid.fid_data, fh_fmtp->fh4_data, fid.fid_len); fh_fmtp->fh4_flag = 0; #ifdef VOLATILE_FH_TEST /* * XXX (temporary?) * Use the rnode volatile_id value to add volatility to the fh. * * For testing purposes there are currently two scenarios, based * on whether the filesystem was shared with "volatile_fh" * or "expire_on_rename". In the first case, use the value of * export struct share_time as the volatile_id. In the second * case use the vnode volatile_id value (which is set to the * time in which the file was renamed). * * Note that the above are temporary constructs for testing only * XXX */ if (exi->exi_export.ex_flags & EX_VOLRNM) { fh_fmtp->fh4_volatile_id = find_volrnm_fh_id(exi, fh); } else if (exi->exi_export.ex_flags & EX_VOLFH) { fh_fmtp->fh4_volatile_id = exi->exi_volatile_id; } else { fh_fmtp->fh4_volatile_id = 0; } #endif /* VOLATILE_FH_TEST */ return (0); } /* * Convert an fhandle into a vnode. * Uses the file id (fh_len + fh_data) in the fhandle to get the vnode. * WARNING: users of this routine must do a VN_RELE on the vnode when they * are done with it. */ vnode_t * nfs_fhtovp(fhandle_t *fh, struct exportinfo *exi) { vfs_t *vfsp; vnode_t *vp; int error; fid_t *fidp; TRACE_0(TR_FAC_NFS, TR_FHTOVP_START, "fhtovp_start"); if (exi == NULL) { TRACE_1(TR_FAC_NFS, TR_FHTOVP_END, "fhtovp_end:(%S)", "exi NULL"); return (NULL); /* not exported */ } ASSERT(exi->exi_vp != NULL); if (PUBLIC_FH2(fh)) { if (exi->exi_export.ex_flags & EX_PUBLIC) { TRACE_1(TR_FAC_NFS, TR_FHTOVP_END, "fhtovp_end:(%S)", "root not exported"); return (NULL); } vp = exi->exi_vp; VN_HOLD(vp); return (vp); } vfsp = exi->exi_vp->v_vfsp; ASSERT(vfsp != NULL); fidp = (fid_t *)&fh->fh_len; error = VFS_VGET(vfsp, &vp, fidp); if (error || vp == NULL) { TRACE_1(TR_FAC_NFS, TR_FHTOVP_END, "fhtovp_end:(%S)", "VFS_GET failed or vp NULL"); return (NULL); } TRACE_1(TR_FAC_NFS, TR_FHTOVP_END, "fhtovp_end:(%S)", "end"); return (vp); } /* * Convert an fhandle into a vnode. * Uses the file id (fh_len + fh_data) in the fhandle to get the vnode. * WARNING: users of this routine must do a VN_RELE on the vnode when they * are done with it. * This is just like nfs_fhtovp() but without the exportinfo argument. */ vnode_t * lm_fhtovp(fhandle_t *fh) { register vfs_t *vfsp; vnode_t *vp; int error; vfsp = getvfs(&fh->fh_fsid); if (vfsp == NULL) return (NULL); error = VFS_VGET(vfsp, &vp, (fid_t *)&(fh->fh_len)); VFS_RELE(vfsp); if (error || vp == NULL) return (NULL); return (vp); } /* * Convert an nfs_fh3 into a vnode. * Uses the file id (fh_len + fh_data) in the file handle to get the vnode. * WARNING: users of this routine must do a VN_RELE on the vnode when they * are done with it. */ vnode_t * nfs3_fhtovp(nfs_fh3 *fh, struct exportinfo *exi) { vfs_t *vfsp; vnode_t *vp; int error; fid_t *fidp; if (exi == NULL) return (NULL); /* not exported */ ASSERT(exi->exi_vp != NULL); if (PUBLIC_FH3(fh)) { if (exi->exi_export.ex_flags & EX_PUBLIC) return (NULL); vp = exi->exi_vp; VN_HOLD(vp); return (vp); } if (fh->fh3_length < NFS3_OLDFHSIZE || fh->fh3_length > NFS3_MAXFHSIZE) return (NULL); vfsp = exi->exi_vp->v_vfsp; ASSERT(vfsp != NULL); fidp = FH3TOFIDP(fh); error = VFS_VGET(vfsp, &vp, fidp); if (error || vp == NULL) return (NULL); return (vp); } /* * Convert an nfs_fh3 into a vnode. * Uses the file id (fh_len + fh_data) in the file handle to get the vnode. * WARNING: users of this routine must do a VN_RELE on the vnode when they * are done with it. * BTW: This is just like nfs3_fhtovp() but without the exportinfo arg. * Also, vfsp is accessed through getvfs() rather using exportinfo !! */ vnode_t * lm_nfs3_fhtovp(nfs_fh3 *fh) { vfs_t *vfsp; vnode_t *vp; int error; fid_t *fidp; if (fh->fh3_length < NFS3_OLDFHSIZE || fh->fh3_length > NFS3_MAXFHSIZE) return (NULL); vfsp = getvfs(&fh->fh3_fsid); if (vfsp == NULL) return (NULL); fidp = FH3TOFIDP(fh); error = VFS_VGET(vfsp, &vp, fidp); VFS_RELE(vfsp); if (error || vp == NULL) return (NULL); return (vp); } /* * Convert an nfs_fh4 into a vnode. * Uses the file id (fh_len + fh_data) in the file handle to get the vnode. * WARNING: users of this routine must do a VN_RELE on the vnode when they * are done with it. */ vnode_t * nfs4_fhtovp(nfs_fh4 *fh, struct exportinfo *exi, nfsstat4 *statp) { vfs_t *vfsp; vnode_t *vp = NULL; int error; fid_t *fidp; nfs_fh4_fmt_t *fh_fmtp; #ifdef VOLATILE_FH_TEST uint32_t volatile_id = 0; #endif /* VOLATILE_FH_TEST */ if (exi == NULL) { *statp = NFS4ERR_STALE; return (NULL); /* not exported */ } ASSERT(exi->exi_vp != NULL); /* caller should have checked this */ ASSERT(fh->nfs_fh4_len >= NFS_FH4_LEN); fh_fmtp = (nfs_fh4_fmt_t *)fh->nfs_fh4_val; vfsp = exi->exi_vp->v_vfsp; ASSERT(vfsp != NULL); fidp = (fid_t *)&fh_fmtp->fh4_len; #ifdef VOLATILE_FH_TEST /* XXX check if volatile - should be changed later */ if (exi->exi_export.ex_flags & (EX_VOLRNM | EX_VOLFH)) { /* * Filesystem is shared with volatile filehandles */ if (exi->exi_export.ex_flags & EX_VOLRNM) volatile_id = find_volrnm_fh_id(exi, fh); else volatile_id = exi->exi_volatile_id; if (fh_fmtp->fh4_volatile_id != volatile_id) { *statp = NFS4ERR_FHEXPIRED; return (NULL); } } /* * XXX even if test_volatile_fh false, the fh may contain a * volatile id if obtained when the test was set. */ fh_fmtp->fh4_volatile_id = (uchar_t)0; #endif /* VOLATILE_FH_TEST */ error = VFS_VGET(vfsp, &vp, fidp); /* * If we can not get vp from VFS_VGET, perhaps this is * an nfs v2/v3/v4 node in an nfsv4 pseudo filesystem. * Check it out. */ if (error && PSEUDO(exi)) error = nfs4_vget_pseudo(exi, &vp, fidp); if (error || vp == NULL) { *statp = NFS4ERR_STALE; return (NULL); } /* XXX - disgusting hack */ if (vp->v_type == VNON && vp->v_flag & V_XATTRDIR) vp->v_type = VDIR; *statp = NFS4_OK; return (vp); } /* * Find the export structure associated with the given filesystem. * If found, then increment the ref count (exi_count). */ struct exportinfo * checkexport(fsid_t *fsid, fid_t *fid) { struct exportinfo *exi; rw_enter(&exported_lock, RW_READER); for (exi = exptable[exptablehash(fsid, fid)]; exi != NULL; exi = exi->exi_hash) { if (exportmatch(exi, fsid, fid)) { /* * If this is the place holder for the * public file handle, then return the * real export entry for the public file * handle. */ if (exi->exi_export.ex_flags & EX_PUBLIC) { exi = exi_public; } mutex_enter(&exi->exi_lock); exi->exi_count++; mutex_exit(&exi->exi_lock); rw_exit(&exported_lock); return (exi); } } rw_exit(&exported_lock); return (NULL); } /* * "old school" version of checkexport() for NFS4. NFS4 * rfs4_compound holds exported_lock for duration of compound * processing. This version doesn't manipulate exi_count * since NFS4 breaks fundamental assumptions in the exi_count * design. */ struct exportinfo * checkexport4(fsid_t *fsid, fid_t *fid, vnode_t *vp) { struct exportinfo *exi; ASSERT(RW_LOCK_HELD(&exported_lock)); for (exi = exptable[exptablehash(fsid, fid)]; exi != NULL; exi = exi->exi_hash) { if (exportmatch(exi, fsid, fid)) { /* * If this is the place holder for the * public file handle, then return the * real export entry for the public file * handle. */ if (exi->exi_export.ex_flags & EX_PUBLIC) { exi = exi_public; } /* * If vp is given, check if vp is the * same vnode as the exported node. * * Since VOP_FID of a lofs node returns the * fid of its real node (ufs), the exported * node for lofs and (pseudo) ufs may have * the same fsid and fid. */ if (vp == NULL || vp == exi->exi_vp) return (exi); } } return (NULL); } /* * Free an entire export list node */ void exportfree(struct exportinfo *exi) { struct exportdata *ex; ex = &exi->exi_export; ASSERT(exi->exi_vp != NULL && !(exi->exi_export.ex_flags & EX_PUBLIC)); VN_RELE(exi->exi_vp); if (exi->exi_dvp != NULL) VN_RELE(exi->exi_dvp); if (ex->ex_flags & EX_INDEX) kmem_free(ex->ex_index, strlen(ex->ex_index) + 1); kmem_free(ex->ex_path, ex->ex_pathlen + 1); nfsauth_cache_free(exi); if (exi->exi_logbuffer != NULL) nfslog_disable(exi); if (ex->ex_flags & EX_LOG) { kmem_free(ex->ex_log_buffer, ex->ex_log_bufferlen + 1); kmem_free(ex->ex_tag, ex->ex_taglen + 1); } if (exi->exi_visible) free_visible(exi->exi_visible); srv_secinfo_list_free(ex->ex_secinfo, ex->ex_seccnt); #ifdef VOLATILE_FH_TEST free_volrnm_list(exi); mutex_destroy(&exi->exi_vol_rename_lock); #endif /* VOLATILE_FH_TEST */ mutex_destroy(&exi->exi_lock); rw_destroy(&exi->exi_cache_lock); kmem_free(exi, sizeof (*exi)); } /* * load the index file from user space into kernel space. */ static int loadindex(struct exportdata *kex) { int error; char index[MAXNAMELEN+1]; size_t len; /* * copyinstr copies the complete string including the NULL and * returns the len with the NULL byte included in the calculation * as long as the max length is not exceeded. */ if (error = copyinstr(kex->ex_index, index, sizeof (index), &len)) return (error); kex->ex_index = kmem_alloc(len, KM_SLEEP); bcopy(index, kex->ex_index, len); return (0); } /* * When a thread completes using exi, it should call exi_rele(). * exi_rele() decrements exi_count. It releases exi if exi_count == 0, i.e. * if this is the last user of exi and exi is not on exportinfo list anymore */ void exi_rele(struct exportinfo *exi) { mutex_enter(&exi->exi_lock); exi->exi_count--; if (exi->exi_count == 0) { mutex_exit(&exi->exi_lock); exportfree(exi); } else mutex_exit(&exi->exi_lock); } #ifdef VOLATILE_FH_TEST /* * Test for volatile fh's - add file handle to list and set its volatile id * to time it was renamed. If EX_VOLFH is also on and the fs is reshared, * the vol_rename queue is purged. * * XXX This code is for unit testing purposes only... To correctly use it, it * needs to tie a rename list to the export struct and (more * important), protect access to the exi rename list using a write lock. */ /* * get the fh vol record if it's in the volatile on rename list. Don't check * volatile_id in the file handle - compare only the file handles. */ static struct ex_vol_rename * find_volrnm_fh(struct exportinfo *exi, nfs_fh4 *fh4p) { struct ex_vol_rename *p = NULL; fhandle4_t *fhp; /* XXX shouldn't we assert &exported_lock held? */ ASSERT(MUTEX_HELD(&exi->exi_vol_rename_lock)); if (fh4p->nfs_fh4_len != NFS_FH4_LEN) { return (NULL); } fhp = &((nfs_fh4_fmt_t *)fh4p->nfs_fh4_val)->fh4_i; for (p = exi->exi_vol_rename; p != NULL; p = p->vrn_next) { if (bcmp(fhp, &p->vrn_fh_fmt.fh4_i, sizeof (fhandle4_t)) == 0) break; } return (p); } /* * get the volatile id for the fh (if there is - else return 0). Ignore the * volatile_id in the file handle - compare only the file handles. */ static uint32_t find_volrnm_fh_id(struct exportinfo *exi, nfs_fh4 *fh4p) { struct ex_vol_rename *p; uint32_t volatile_id; mutex_enter(&exi->exi_vol_rename_lock); p = find_volrnm_fh(exi, fh4p); volatile_id = (p ? p->vrn_fh_fmt.fh4_volatile_id : exi->exi_volatile_id); mutex_exit(&exi->exi_vol_rename_lock); return (volatile_id); } /* * Free the volatile on rename list - will be called if a filesystem is * unshared or reshared without EX_VOLRNM */ static void free_volrnm_list(struct exportinfo *exi) { struct ex_vol_rename *p, *pnext; /* no need to hold mutex lock - this one is called from exportfree */ for (p = exi->exi_vol_rename; p != NULL; p = pnext) { pnext = p->vrn_next; kmem_free(p, sizeof (*p)); } exi->exi_vol_rename = NULL; } /* * Add a file handle to the volatile on rename list. */ void add_volrnm_fh(struct exportinfo *exi, vnode_t *vp) { struct ex_vol_rename *p; char fhbuf[NFS4_FHSIZE]; nfs_fh4 fh4; int error; fh4.nfs_fh4_val = fhbuf; error = makefh4(&fh4, vp, exi); if ((error) || (fh4.nfs_fh4_len != sizeof (p->vrn_fh_fmt))) { return; } mutex_enter(&exi->exi_vol_rename_lock); p = find_volrnm_fh(exi, &fh4); if (p == NULL) { p = kmem_alloc(sizeof (*p), KM_SLEEP); bcopy(fh4.nfs_fh4_val, &p->vrn_fh_fmt, sizeof (p->vrn_fh_fmt)); p->vrn_next = exi->exi_vol_rename; exi->exi_vol_rename = p; } p->vrn_fh_fmt.fh4_volatile_id = gethrestime_sec(); mutex_exit(&exi->exi_vol_rename_lock); } #endif /* VOLATILE_FH_TEST */