+ vfs_getnewfsid(mp);
+ nmp->nm_mountp = mp;
+ vfs_setauthopaque(mp);
+
+ nfs_nhinit_finish();
+
+ nmp->nm_args = xdrbuf;
+
+ /* set up defaults */
+ nmp->nm_ref = 0;
+ nmp->nm_vers = 0;
+ nmp->nm_min_vers = DEFAULT_NFS_MIN_VERS;
+ nmp->nm_max_vers = DEFAULT_NFS_MAX_VERS;
+ nmp->nm_timeo = NFS_TIMEO;
+ nmp->nm_retry = NFS_RETRANS;
+ nmp->nm_sotype = 0;
+ nmp->nm_sofamily = 0;
+ nmp->nm_nfsport = 0;
+ nmp->nm_wsize = NFS_WSIZE;
+ nmp->nm_rsize = NFS_RSIZE;
+ nmp->nm_readdirsize = NFS_READDIRSIZE;
+ nmp->nm_numgrps = NFS_MAXGRPS;
+ nmp->nm_readahead = NFS_DEFRAHEAD;
+ nmp->nm_tprintf_delay = nfs_tprintf_delay;
+ if (nmp->nm_tprintf_delay < 0)
+ nmp->nm_tprintf_delay = 0;
+ nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
+ if (nmp->nm_tprintf_initial_delay < 0)
+ nmp->nm_tprintf_initial_delay = 0;
+ nmp->nm_acregmin = NFS_MINATTRTIMO;
+ nmp->nm_acregmax = NFS_MAXATTRTIMO;
+ nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
+ nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
+ nmp->nm_auth = RPCAUTH_SYS;
+ nmp->nm_iodlink.tqe_next = NFSNOLIST;
+ nmp->nm_deadtimeout = 0;
+ nmp->nm_curdeadtimeout = 0;
+ NFS_BITMAP_SET(nmp->nm_flags, NFS_MFLAG_NOACL);
+ nmp->nm_realm = NULL;
+ nmp->nm_principal = NULL;
+ nmp->nm_sprinc = NULL;
+ }
+
+ mattrs = nmp->nm_mattrs;
+ mflags = nmp->nm_mflags;
+ mflags_mask = nmp->nm_mflags_mask;
+
+ /* set up NFS mount with args */
+ xb_init_buffer(&xb, xdrbuf, 2*XDRWORD);
+ xb_get_32(error, &xb, val); /* version */
+ xb_get_32(error, &xb, argslength); /* args length */
+ nfsmerr_if(error);
+ xb_init_buffer(&xb, xdrbuf, argslength); /* restart parsing with actual buffer length */
+ xb_get_32(error, &xb, val); /* version */
+ xb_get_32(error, &xb, argslength); /* args length */
+ xb_get_32(error, &xb, val); /* XDR args version */
+ if (val != NFS_XDRARGS_VERSION_0)
+ error = EINVAL;
+ len = NFS_MATTR_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, mattrs, len); /* mount attribute bitmap */
+ attrslength = 0;
+ xb_get_32(error, &xb, attrslength); /* attrs length */
+ if (!error && (attrslength > (argslength - ((4+NFS_MATTR_BITMAP_LEN+1)*XDRWORD))))
+ error = EINVAL;
+ nfsmerr_if(error);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FLAGS)) {
+ len = NFS_MFLAG_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, mflags_mask, len); /* mount flag mask */
+ len = NFS_MFLAG_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, mflags, len); /* mount flag values */
+ if (!error) {
+ /* clear all mask bits and OR in all the ones that are set */
+ nmp->nm_flags[0] &= ~mflags_mask[0];
+ nmp->nm_flags[0] |= (mflags_mask[0] & mflags[0]);
+ }
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION)) {
+ /* Can't specify a single version and a range */
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION_RANGE))
+ error = EINVAL;
+ xb_get_32(error, &xb, nmp->nm_vers);
+ if (nmp->nm_vers > NFS_MAX_SUPPORTED_VERSION ||
+ nmp->nm_vers < NFS_VER2)
+ error = EINVAL;
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_MINOR_VERSION))
+ xb_get_32(error, &xb, nmp->nm_minor_vers);
+ else
+ nmp->nm_minor_vers = maxminorverstab[nmp->nm_vers];
+ if (nmp->nm_minor_vers > maxminorverstab[nmp->nm_vers])
+ error = EINVAL;
+ nmp->nm_max_vers = nmp->nm_min_vers =
+ VER2PVER(nmp->nm_vers, nmp->nm_minor_vers);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_MINOR_VERSION)) {
+ /* should have also gotten NFS version (and already gotten minor version) */
+ if (!NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION))
+ error = EINVAL;
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION_RANGE)) {
+ xb_get_32(error, &xb, nmp->nm_min_vers);
+ xb_get_32(error, &xb, nmp->nm_max_vers);
+ if ((nmp->nm_min_vers > nmp->nm_max_vers) ||
+ (PVER2MAJOR(nmp->nm_max_vers) > NFS_MAX_SUPPORTED_VERSION) ||
+ (PVER2MINOR(nmp->nm_min_vers) > maxminorverstab[PVER2MAJOR(nmp->nm_min_vers)]) ||
+ (PVER2MINOR(nmp->nm_max_vers) > maxminorverstab[PVER2MAJOR(nmp->nm_max_vers)]))
+ error = EINVAL;
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READ_SIZE))
+ xb_get_32(error, &xb, nmp->nm_rsize);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_WRITE_SIZE))
+ xb_get_32(error, &xb, nmp->nm_wsize);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READDIR_SIZE))
+ xb_get_32(error, &xb, nmp->nm_readdirsize);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READAHEAD))
+ xb_get_32(error, &xb, nmp->nm_readahead);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_REG_MIN)) {
+ xb_get_32(error, &xb, nmp->nm_acregmin);
+ xb_skip(error, &xb, XDRWORD);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_REG_MAX)) {
+ xb_get_32(error, &xb, nmp->nm_acregmax);
+ xb_skip(error, &xb, XDRWORD);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_DIR_MIN)) {
+ xb_get_32(error, &xb, nmp->nm_acdirmin);
+ xb_skip(error, &xb, XDRWORD);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_DIR_MAX)) {
+ xb_get_32(error, &xb, nmp->nm_acdirmax);
+ xb_skip(error, &xb, XDRWORD);
+ }
+ nfsmerr_if(error);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_LOCK_MODE)) {
+ xb_get_32(error, &xb, val);
+ switch (val) {
+ case NFS_LOCK_MODE_DISABLED:
+ case NFS_LOCK_MODE_LOCAL:
+ if (nmp->nm_vers >= NFS_VER4) {
+ /* disabled/local lock mode only allowed on v2/v3 */
+ error = EINVAL;
+ break;
+ }
+ /* FALLTHROUGH */
+ case NFS_LOCK_MODE_ENABLED:
+ nmp->nm_lockmode = val;
+ break;
+ default:
+ error = EINVAL;
+ }
+ }
+ nfsmerr_if(error);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SECURITY)) {
+ uint32_t seccnt;
+ xb_get_32(error, &xb, seccnt);
+ if (!error && ((seccnt < 1) || (seccnt > NX_MAX_SEC_FLAVORS)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ nmp->nm_sec.count = seccnt;
+ for (i=0; i < seccnt; i++) {
+ xb_get_32(error, &xb, nmp->nm_sec.flavors[i]);
+ /* Check for valid security flavor */
+ switch (nmp->nm_sec.flavors[i]) {
+ case RPCAUTH_NONE:
+ case RPCAUTH_SYS:
+ case RPCAUTH_KRB5:
+ case RPCAUTH_KRB5I:
+ case RPCAUTH_KRB5P:
+ break;
+ default:
+ error = EINVAL;
+ }
+ }
+ /* start with the first flavor */
+ nmp->nm_auth = nmp->nm_sec.flavors[0];
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MAX_GROUP_LIST))
+ xb_get_32(error, &xb, nmp->nm_numgrps);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SOCKET_TYPE)) {
+ char sotype[6];
+
+ xb_get_32(error, &xb, val);
+ if (!error && ((val < 3) || (val > 5)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, sotype, val, 0);
+ nfsmerr_if(error);
+ sotype[val] = '\0';
+ if (!strcmp(sotype, "tcp")) {
+ nmp->nm_sotype = SOCK_STREAM;
+ } else if (!strcmp(sotype, "udp")) {
+ nmp->nm_sotype = SOCK_DGRAM;
+ } else if (!strcmp(sotype, "tcp4")) {
+ nmp->nm_sotype = SOCK_STREAM;
+ nmp->nm_sofamily = AF_INET;
+ } else if (!strcmp(sotype, "udp4")) {
+ nmp->nm_sotype = SOCK_DGRAM;
+ nmp->nm_sofamily = AF_INET;
+ } else if (!strcmp(sotype, "tcp6")) {
+ nmp->nm_sotype = SOCK_STREAM;
+ nmp->nm_sofamily = AF_INET6;
+ } else if (!strcmp(sotype, "udp6")) {
+ nmp->nm_sotype = SOCK_DGRAM;
+ nmp->nm_sofamily = AF_INET6;
+ } else if (!strcmp(sotype, "inet4")) {
+ nmp->nm_sofamily = AF_INET;
+ } else if (!strcmp(sotype, "inet6")) {
+ nmp->nm_sofamily = AF_INET6;
+ } else if (!strcmp(sotype, "inet")) {
+ nmp->nm_sofamily = 0; /* ok */
+ } else {
+ error = EINVAL;
+ }
+ if (!error && (nmp->nm_vers >= NFS_VER4) && nmp->nm_sotype &&
+ (nmp->nm_sotype != SOCK_STREAM))
+ error = EINVAL; /* NFSv4 is only allowed over TCP. */
+ nfsmerr_if(error);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_PORT))
+ xb_get_32(error, &xb, nmp->nm_nfsport);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MOUNT_PORT))
+ xb_get_32(error, &xb, nmp->nm_mountport);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_REQUEST_TIMEOUT)) {
+ /* convert from time to 0.1s units */
+ xb_get_32(error, &xb, nmp->nm_timeo);
+ xb_get_32(error, &xb, val);
+ nfsmerr_if(error);
+ if (val >= 1000000000)
+ error = EINVAL;
+ nfsmerr_if(error);
+ nmp->nm_timeo *= 10;
+ nmp->nm_timeo += (val+100000000-1)/100000000;
+ /* now convert to ticks */
+ nmp->nm_timeo = (nmp->nm_timeo * NFS_HZ + 5) / 10;
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SOFT_RETRY_COUNT)) {
+ xb_get_32(error, &xb, val);
+ if (!error && (val > 1))
+ nmp->nm_retry = val;
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_DEAD_TIMEOUT)) {
+ xb_get_32(error, &xb, nmp->nm_deadtimeout);
+ xb_skip(error, &xb, XDRWORD);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FH)) {
+ nfsmerr_if(error);
+ MALLOC(nmp->nm_fh, fhandle_t *, sizeof(fhandle_t), M_TEMP, M_WAITOK|M_ZERO);
+ if (!nmp->nm_fh)
+ error = ENOMEM;
+ xb_get_32(error, &xb, nmp->nm_fh->fh_len);
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, (char*)&nmp->nm_fh->fh_data[0], nmp->nm_fh->fh_len, 0);
+ }
+ nfsmerr_if(error);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FS_LOCATIONS)) {
+ uint32_t loc, serv, addr, comp;
+ struct nfs_fs_location *fsl;
+ struct nfs_fs_server *fss;
+ struct nfs_fs_path *fsp;
+
+ xb_get_32(error, &xb, nmp->nm_locations.nl_numlocs); /* fs location count */
+ /* sanity check location count */
+ if (!error && ((nmp->nm_locations.nl_numlocs < 1) || (nmp->nm_locations.nl_numlocs > 256)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ MALLOC(nmp->nm_locations.nl_locations, struct nfs_fs_location **, nmp->nm_locations.nl_numlocs * sizeof(struct nfs_fs_location*), M_TEMP, M_WAITOK|M_ZERO);
+ if (!nmp->nm_locations.nl_locations)
+ error = ENOMEM;
+ for (loc = 0; loc < nmp->nm_locations.nl_numlocs; loc++) {
+ nfsmerr_if(error);
+ MALLOC(fsl, struct nfs_fs_location *, sizeof(struct nfs_fs_location), M_TEMP, M_WAITOK|M_ZERO);
+ if (!fsl)
+ error = ENOMEM;
+ nmp->nm_locations.nl_locations[loc] = fsl;
+ xb_get_32(error, &xb, fsl->nl_servcount); /* server count */
+ /* sanity check server count */
+ if (!error && ((fsl->nl_servcount < 1) || (fsl->nl_servcount > 256)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ MALLOC(fsl->nl_servers, struct nfs_fs_server **, fsl->nl_servcount * sizeof(struct nfs_fs_server*), M_TEMP, M_WAITOK|M_ZERO);
+ if (!fsl->nl_servers)
+ error = ENOMEM;
+ for (serv = 0; serv < fsl->nl_servcount; serv++) {
+ nfsmerr_if(error);
+ MALLOC(fss, struct nfs_fs_server *, sizeof(struct nfs_fs_server), M_TEMP, M_WAITOK|M_ZERO);
+ if (!fss)
+ error = ENOMEM;
+ fsl->nl_servers[serv] = fss;
+ xb_get_32(error, &xb, val); /* server name length */
+ /* sanity check server name length */
+ if (!error && ((val < 1) || (val > MAXPATHLEN)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ MALLOC(fss->ns_name, char *, val+1, M_TEMP, M_WAITOK|M_ZERO);
+ if (!fss->ns_name)
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, fss->ns_name, val, 0); /* server name */
+ xb_get_32(error, &xb, fss->ns_addrcount); /* address count */
+ /* sanity check address count (OK to be zero) */
+ if (!error && (fss->ns_addrcount > 256))
+ error = EINVAL;
+ nfsmerr_if(error);
+ if (fss->ns_addrcount > 0) {
+ MALLOC(fss->ns_addresses, char **, fss->ns_addrcount * sizeof(char *), M_TEMP, M_WAITOK|M_ZERO);
+ if (!fss->ns_addresses)
+ error = ENOMEM;
+ for (addr = 0; addr < fss->ns_addrcount; addr++) {
+ xb_get_32(error, &xb, val); /* address length */
+ /* sanity check address length */
+ if (!error && ((val < 1) || (val > 128)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ MALLOC(fss->ns_addresses[addr], char *, val+1, M_TEMP, M_WAITOK|M_ZERO);
+ if (!fss->ns_addresses[addr])
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, fss->ns_addresses[addr], val, 0); /* address */
+ }
+ }
+ xb_get_32(error, &xb, val); /* server info length */
+ xb_skip(error, &xb, val); /* skip server info */
+ }
+ /* get pathname */
+ fsp = &fsl->nl_path;
+ xb_get_32(error, &xb, fsp->np_compcount); /* component count */
+ /* sanity check component count */
+ if (!error && (fsp->np_compcount > MAXPATHLEN))
+ error = EINVAL;
+ nfsmerr_if(error);
+ if (fsp->np_compcount) {
+ MALLOC(fsp->np_components, char **, fsp->np_compcount * sizeof(char*), M_TEMP, M_WAITOK|M_ZERO);
+ if (!fsp->np_components)
+ error = ENOMEM;
+ }
+ for (comp = 0; comp < fsp->np_compcount; comp++) {
+ xb_get_32(error, &xb, val); /* component length */
+ /* sanity check component length */
+ if (!error && (val == 0)) {
+ /*
+ * Apparently some people think a path with zero components should
+ * be encoded with one zero-length component. So, just ignore any
+ * zero length components.
+ */
+ comp--;
+ fsp->np_compcount--;
+ if (fsp->np_compcount == 0) {
+ FREE(fsp->np_components, M_TEMP);
+ fsp->np_components = NULL;
+ }
+ continue;
+ }
+ if (!error && ((val < 1) || (val > MAXPATHLEN)))
+ error = EINVAL;
+ nfsmerr_if(error);
+ MALLOC(fsp->np_components[comp], char *, val+1, M_TEMP, M_WAITOK|M_ZERO);
+ if (!fsp->np_components[comp])
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, fsp->np_components[comp], val, 0); /* component */
+ }
+ xb_get_32(error, &xb, val); /* fs location info length */
+ xb_skip(error, &xb, val); /* skip fs location info */
+ }
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MNTFLAGS))
+ xb_skip(error, &xb, XDRWORD);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MNTFROM)) {
+ xb_get_32(error, &xb, len);
+ nfsmerr_if(error);
+ val = len;
+ if (val >= sizeof(vfs_statfs(mp)->f_mntfromname))
+ val = sizeof(vfs_statfs(mp)->f_mntfromname) - 1;
+ error = xb_get_bytes(&xb, vfs_statfs(mp)->f_mntfromname, val, 0);
+ if ((len - val) > 0)
+ xb_skip(error, &xb, len - val);
+ nfsmerr_if(error);
+ vfs_statfs(mp)->f_mntfromname[val] = '\0';
+ }
+ nfsmerr_if(error);
+
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_REALM)) {
+ xb_get_32(error, &xb, len);
+ if (!error && ((len < 1) || (len > MAXPATHLEN)))
+ error=EINVAL;
+ nfsmerr_if(error);
+ /* allocate an extra byte for a leading '@' if its not already prepended to the realm */
+ MALLOC(nmp->nm_realm, char *, len+2, M_TEMP, M_WAITOK|M_ZERO);
+ if (!nmp->nm_realm)
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, nmp->nm_realm, len, 0);
+ if (error == 0 && *nmp->nm_realm != '@') {
+ bcopy(nmp->nm_realm, &nmp->nm_realm[1], len);
+ nmp->nm_realm[0] = '@';
+ }
+ }
+ nfsmerr_if(error);
+
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_PRINCIPAL)) {
+ xb_get_32(error, &xb, len);
+ if (!error && ((len < 1) || (len > MAXPATHLEN)))
+ error=EINVAL;
+ nfsmerr_if(error);
+ MALLOC(nmp->nm_principal, char *, len+1, M_TEMP, M_WAITOK|M_ZERO);
+ if (!nmp->nm_principal)
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, nmp->nm_principal, len, 0);
+ }
+ nfsmerr_if(error);
+
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SVCPRINCIPAL)) {
+ xb_get_32(error, &xb, len);
+ if (!error && ((len < 1) || (len > MAXPATHLEN)))
+ error=EINVAL;
+ nfsmerr_if(error);
+ MALLOC(nmp->nm_sprinc, char *, len+1, M_TEMP, M_WAITOK|M_ZERO);
+ if (!nmp->nm_sprinc)
+ error = ENOMEM;
+ nfsmerr_if(error);
+ error = xb_get_bytes(&xb, nmp->nm_sprinc, len, 0);
+ }
+ nfsmerr_if(error);
+
+ /*
+ * Sanity check/finalize settings.
+ */
+
+ if (nmp->nm_timeo < NFS_MINTIMEO)
+ nmp->nm_timeo = NFS_MINTIMEO;
+ else if (nmp->nm_timeo > NFS_MAXTIMEO)
+ nmp->nm_timeo = NFS_MAXTIMEO;
+ if (nmp->nm_retry > NFS_MAXREXMIT)
+ nmp->nm_retry = NFS_MAXREXMIT;
+
+ if (nmp->nm_numgrps > NFS_MAXGRPS)
+ nmp->nm_numgrps = NFS_MAXGRPS;
+ if (nmp->nm_readahead > NFS_MAXRAHEAD)
+ nmp->nm_readahead = NFS_MAXRAHEAD;
+ if (nmp->nm_acregmin > nmp->nm_acregmax)
+ nmp->nm_acregmin = nmp->nm_acregmax;
+ if (nmp->nm_acdirmin > nmp->nm_acdirmax)
+ nmp->nm_acdirmin = nmp->nm_acdirmax;
+
+ /* need at least one fs location */
+ if (nmp->nm_locations.nl_numlocs < 1)
+ error = EINVAL;
+ nfsmerr_if(error);
+
+ /* init mount's mntfromname to first location */
+ if (!NM_OMATTR_GIVEN(nmp, MNTFROM))
+ nfs_location_mntfromname(&nmp->nm_locations, firstloc,
+ vfs_statfs(mp)->f_mntfromname, sizeof(vfs_statfs(mp)->f_mntfromname), 0);
+
+ /* Need to save the mounting credential for v4. */
+ nmp->nm_mcred = vfs_context_ucred(ctx);
+ if (IS_VALID_CRED(nmp->nm_mcred))
+ kauth_cred_ref(nmp->nm_mcred);
+
+ /*
+ * If a reserved port is required, check for that privilege.
+ * (Note that mirror mounts are exempt because the privilege was
+ * already checked for the original mount.)
+ */
+ if (NMFLAG(nmp, RESVPORT) && !vfs_iskernelmount(mp))
+ error = priv_check_cred(nmp->nm_mcred, PRIV_NETINET_RESERVEDPORT, 0);
+ nfsmerr_if(error);
+
+ /* do mount's initial socket connection */
+ error = nfs_mount_connect(nmp);
+ nfsmerr_if(error);
+
+ /* set up the version-specific function tables */
+ if (nmp->nm_vers < NFS_VER4)
+ nmp->nm_funcs = &nfs3_funcs;
+ else
+ nmp->nm_funcs = &nfs4_funcs;
+
+ /* sanity check settings now that version/connection is set */
+ if (nmp->nm_vers == NFS_VER2) /* ignore RDIRPLUS on NFSv2 */
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_RDIRPLUS);
+ if (nmp->nm_vers >= NFS_VER4) {
+ if (NFS_BITMAP_ISSET(nmp->nm_flags, NFS_MFLAG_ACLONLY)) /* aclonly trumps noacl */
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_NOACL);
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_CALLUMNT);
+ if (nmp->nm_lockmode != NFS_LOCK_MODE_ENABLED)
+ error = EINVAL; /* disabled/local lock mode only allowed on v2/v3 */
+ } else {
+ /* ignore these if not v4 */
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_NOCALLBACK);
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_NONAMEDATTR);
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_NOACL);
+ NFS_BITMAP_CLR(nmp->nm_flags, NFS_MFLAG_ACLONLY);
+ }
+ nfsmerr_if(error);
+
+ if (nmp->nm_sotype == SOCK_DGRAM) {
+ /* I/O size defaults for UDP are different */
+ if (!NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READ_SIZE))
+ nmp->nm_rsize = NFS_DGRAM_RSIZE;
+ if (!NFS_BITMAP_ISSET(mattrs, NFS_MATTR_WRITE_SIZE))
+ nmp->nm_wsize = NFS_DGRAM_WSIZE;
+ }
+
+ /* round down I/O sizes to multiple of NFS_FABLKSIZE */
+ nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
+ if (nmp->nm_rsize <= 0)
+ nmp->nm_rsize = NFS_FABLKSIZE;
+ nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
+ if (nmp->nm_wsize <= 0)
+ nmp->nm_wsize = NFS_FABLKSIZE;
+
+ /* and limit I/O sizes to maximum allowed */
+ maxio = (nmp->nm_vers == NFS_VER2) ? NFS_V2MAXDATA :
+ (nmp->nm_sotype == SOCK_DGRAM) ? NFS_MAXDGRAMDATA : NFS_MAXDATA;
+ if (maxio > NFS_MAXBSIZE)
+ maxio = NFS_MAXBSIZE;
+ if (nmp->nm_rsize > maxio)
+ nmp->nm_rsize = maxio;
+ if (nmp->nm_wsize > maxio)
+ nmp->nm_wsize = maxio;
+
+ if (nmp->nm_readdirsize > maxio)
+ nmp->nm_readdirsize = maxio;
+ if (nmp->nm_readdirsize > nmp->nm_rsize)
+ nmp->nm_readdirsize = nmp->nm_rsize;
+
+ /* Set up the sockets and related info */
+ if (nmp->nm_sotype == SOCK_DGRAM)
+ TAILQ_INIT(&nmp->nm_cwndq);
+
+ /*
+ * Get the root node/attributes from the NFS server and
+ * do any basic, version-specific setup.
+ */
+ error = nmp->nm_funcs->nf_mount(nmp, ctx, &np);
+ nfsmerr_if(error);
+
+ /*
+ * A reference count is needed on the node representing the
+ * remote root. If this object is not persistent, then backward
+ * traversals of the mount point (i.e. "..") will not work if
+ * the node gets flushed out of the cache.
+ */
+ nmp->nm_dnp = np;
+ *vpp = NFSTOV(np);
+ /* get usecount and drop iocount */
+ error = vnode_ref(*vpp);
+ vnode_put(*vpp);
+ if (error) {
+ vnode_recycle(*vpp);
+ goto nfsmerr;
+ }
+
+ /*
+ * Do statfs to ensure static info gets set to reasonable values.
+ */
+ if ((error = nmp->nm_funcs->nf_update_statfs(nmp, ctx))) {
+ int error2 = vnode_getwithref(*vpp);
+ vnode_rele(*vpp);
+ if (!error2)
+ vnode_put(*vpp);
+ vnode_recycle(*vpp);
+ goto nfsmerr;
+ }
+ sbp = vfs_statfs(mp);
+ sbp->f_bsize = nmp->nm_fsattr.nfsa_bsize;
+ sbp->f_blocks = nmp->nm_fsattr.nfsa_space_total / sbp->f_bsize;
+ sbp->f_bfree = nmp->nm_fsattr.nfsa_space_free / sbp->f_bsize;
+ sbp->f_bavail = nmp->nm_fsattr.nfsa_space_avail / sbp->f_bsize;
+ sbp->f_bused = (nmp->nm_fsattr.nfsa_space_total / sbp->f_bsize) -
+ (nmp->nm_fsattr.nfsa_space_free / sbp->f_bsize);
+ sbp->f_files = nmp->nm_fsattr.nfsa_files_total;
+ sbp->f_ffree = nmp->nm_fsattr.nfsa_files_free;
+ sbp->f_iosize = nfs_iosize;
+
+ /*
+ * Calculate the size used for I/O buffers. Use the larger
+ * of the two sizes to minimise NFS requests but make sure
+ * that it is at least one VM page to avoid wasting buffer
+ * space and to allow easy mmapping of I/O buffers.
+ * The read/write RPC calls handle the splitting up of
+ * buffers into multiple requests if the buffer size is
+ * larger than the I/O size.
+ */
+ iosize = max(nmp->nm_rsize, nmp->nm_wsize);
+ if (iosize < PAGE_SIZE)
+ iosize = PAGE_SIZE;
+ nmp->nm_biosize = trunc_page_32(iosize);
+
+ /* For NFSv3 and greater, there is a (relatively) reliable ACCESS call. */
+ if (nmp->nm_vers > NFS_VER2)
+ vfs_setauthopaqueaccess(mp);
+
+ switch (nmp->nm_lockmode) {
+ case NFS_LOCK_MODE_DISABLED:
+ break;
+ case NFS_LOCK_MODE_LOCAL:
+ vfs_setlocklocal(nmp->nm_mountp);
+ break;
+ case NFS_LOCK_MODE_ENABLED:
+ default:
+ if (nmp->nm_vers <= NFS_VER3)
+ nfs_lockd_mount_register(nmp);
+ break;
+ }
+
+ /* success! */
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_state |= NFSSTA_MOUNTED;
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (0);
+nfsmerr:
+ nfs_mount_cleanup(nmp);
+ return (error);
+}
+
+#if CONFIG_TRIGGERS
+
+/*
+ * We've detected a file system boundary on the server and
+ * need to mount a new file system so that our file systems
+ * MIRROR the file systems on the server.
+ *
+ * Build the mount arguments for the new mount and call kernel_mount().
+ */
+int
+nfs_mirror_mount_domount(vnode_t dvp, vnode_t vp, vfs_context_t ctx)
+{
+ nfsnode_t np = VTONFS(vp);
+ nfsnode_t dnp = VTONFS(dvp);
+ struct nfsmount *nmp = NFSTONMP(np);
+ char fstype[MFSTYPENAMELEN], *mntfromname = NULL, *path = NULL, *relpath, *p, *cp;
+ int error = 0, pathbuflen = MAXPATHLEN, i, mntflags = 0, referral, skipcopy = 0;
+ size_t nlen;
+ struct xdrbuf xb, xbnew;
+ uint32_t mattrs[NFS_MATTR_BITMAP_LEN];
+ uint32_t newmattrs[NFS_MATTR_BITMAP_LEN];
+ uint32_t newmflags[NFS_MFLAG_BITMAP_LEN];
+ uint32_t newmflags_mask[NFS_MFLAG_BITMAP_LEN];
+ uint32_t argslength = 0, val, count, mlen, mlen2, rlen, relpathcomps;
+ uint32_t argslength_offset, attrslength_offset, end_offset;
+ uint32_t numlocs, loc, numserv, serv, numaddr, addr, numcomp, comp;
+ char buf[XDRWORD];
+ struct nfs_fs_locations nfsls;
+
+ referral = (np->n_vattr.nva_flags & NFS_FFLAG_TRIGGER_REFERRAL);
+ if (referral)
+ bzero(&nfsls, sizeof(nfsls));
+
+ xb_init(&xbnew, 0);
+
+ if (!nmp || (nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD)))
+ return (ENXIO);
+
+ /* allocate a couple path buffers we need */
+ MALLOC_ZONE(mntfromname, char *, pathbuflen, M_NAMEI, M_WAITOK);
+ if (!mntfromname) {
+ error = ENOMEM;
+ goto nfsmerr;
+ }
+ MALLOC_ZONE(path, char *, pathbuflen, M_NAMEI, M_WAITOK);
+ if (!path) {
+ error = ENOMEM;
+ goto nfsmerr;
+ }
+
+ /* get the path for the directory being mounted on */
+ error = vn_getpath(vp, path, &pathbuflen);
+ if (error) {
+ error = ENOMEM;
+ goto nfsmerr;
+ }
+
+ /*
+ * Set up the mntfromname for the new mount based on the
+ * current mount's mntfromname and the directory's path
+ * relative to the current mount's mntonname.
+ * Set up relpath to point at the relative path on the current mount.
+ * Also, count the number of components in relpath.
+ * We'll be adding those to each fs location path in the new args.
+ */
+ nlen = strlcpy(mntfromname, vfs_statfs(nmp->nm_mountp)->f_mntfromname, MAXPATHLEN);
+ if ((nlen > 0) && (mntfromname[nlen-1] == '/')) { /* avoid double '/' in new name */
+ mntfromname[nlen-1] = '\0';
+ nlen--;
+ }
+ relpath = mntfromname + nlen;
+ nlen = strlcat(mntfromname, path + strlen(vfs_statfs(nmp->nm_mountp)->f_mntonname), MAXPATHLEN);
+ if (nlen >= MAXPATHLEN) {
+ error = ENAMETOOLONG;
+ goto nfsmerr;
+ }
+ /* count the number of components in relpath */
+ p = relpath;
+ while (*p && (*p == '/'))
+ p++;
+ relpathcomps = 0;
+ while (*p) {
+ relpathcomps++;
+ while (*p && (*p != '/'))
+ p++;
+ while (*p && (*p == '/'))
+ p++;
+ }
+
+ /* grab a copy of the file system type */
+ vfs_name(vnode_mount(vp), fstype);
+
+ /* for referrals, fetch the fs locations */
+ if (referral) {
+ const char *vname = vnode_getname(NFSTOV(np));
+ if (!vname) {
+ error = ENOENT;
+ } else {
+ error = nfs4_get_fs_locations(nmp, dnp, NULL, 0, vname, ctx, &nfsls);
+ vnode_putname(vname);
+ if (!error && (nfsls.nl_numlocs < 1))
+ error = ENOENT;
+ }
+ nfsmerr_if(error);
+ }
+
+ /* set up NFS mount args based on current mount args */
+
+#define xb_copy_32(E, XBSRC, XBDST, V) \
+ do { \
+ if (E) break; \
+ xb_get_32((E), (XBSRC), (V)); \
+ if (skipcopy) break; \
+ xb_add_32((E), (XBDST), (V)); \
+ } while (0)
+#define xb_copy_opaque(E, XBSRC, XBDST) \
+ do { \
+ uint32_t __count, __val; \
+ xb_copy_32((E), (XBSRC), (XBDST), __count); \
+ if (E) break; \
+ __count = nfsm_rndup(__count); \
+ __count /= XDRWORD; \
+ while (__count-- > 0) \
+ xb_copy_32((E), (XBSRC), (XBDST), __val); \
+ } while (0)
+
+ xb_init_buffer(&xb, nmp->nm_args, 2*XDRWORD);
+ xb_get_32(error, &xb, val); /* version */
+ xb_get_32(error, &xb, argslength); /* args length */
+ xb_init_buffer(&xb, nmp->nm_args, argslength);
+
+ xb_init_buffer(&xbnew, NULL, 0);
+ xb_copy_32(error, &xb, &xbnew, val); /* version */
+ argslength_offset = xb_offset(&xbnew);
+ xb_copy_32(error, &xb, &xbnew, val); /* args length */
+ xb_copy_32(error, &xb, &xbnew, val); /* XDR args version */
+ count = NFS_MATTR_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, mattrs, count); /* mount attribute bitmap */
+ nfsmerr_if(error);
+ for (i = 0; i < NFS_MATTR_BITMAP_LEN; i++)
+ newmattrs[i] = mattrs[i];
+ if (referral)
+ NFS_BITMAP_SET(newmattrs, NFS_MATTR_FS_LOCATIONS);
+ else
+ NFS_BITMAP_SET(newmattrs, NFS_MATTR_FH);
+ NFS_BITMAP_SET(newmattrs, NFS_MATTR_FLAGS);
+ NFS_BITMAP_SET(newmattrs, NFS_MATTR_MNTFLAGS);
+ NFS_BITMAP_CLR(newmattrs, NFS_MATTR_MNTFROM);
+ xb_add_bitmap(error, &xbnew, newmattrs, NFS_MATTR_BITMAP_LEN);
+ attrslength_offset = xb_offset(&xbnew);
+ xb_copy_32(error, &xb, &xbnew, val); /* attrs length */
+ NFS_BITMAP_ZERO(newmflags_mask, NFS_MFLAG_BITMAP_LEN);
+ NFS_BITMAP_ZERO(newmflags, NFS_MFLAG_BITMAP_LEN);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FLAGS)) {
+ count = NFS_MFLAG_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, newmflags_mask, count); /* mount flag mask bitmap */
+ count = NFS_MFLAG_BITMAP_LEN;
+ xb_get_bitmap(error, &xb, newmflags, count); /* mount flag bitmap */
+ }
+ NFS_BITMAP_SET(newmflags_mask, NFS_MFLAG_EPHEMERAL);
+ NFS_BITMAP_SET(newmflags, NFS_MFLAG_EPHEMERAL);
+ xb_add_bitmap(error, &xbnew, newmflags_mask, NFS_MFLAG_BITMAP_LEN);
+ xb_add_bitmap(error, &xbnew, newmflags, NFS_MFLAG_BITMAP_LEN);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_MINOR_VERSION))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_VERSION_RANGE)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READ_SIZE))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_WRITE_SIZE))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READDIR_SIZE))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_READAHEAD))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_REG_MIN)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_REG_MAX)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_DIR_MIN)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_ATTRCACHE_DIR_MAX)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_LOCK_MODE))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SECURITY)) {
+ xb_copy_32(error, &xb, &xbnew, count);
+ while (!error && (count-- > 0))
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MAX_GROUP_LIST))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SOCKET_TYPE))
+ xb_copy_opaque(error, &xb, &xbnew);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_NFS_PORT))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MOUNT_PORT))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_REQUEST_TIMEOUT)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_SOFT_RETRY_COUNT))
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_DEAD_TIMEOUT)) {
+ xb_copy_32(error, &xb, &xbnew, val);
+ xb_copy_32(error, &xb, &xbnew, val);
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FH)) {
+ xb_get_32(error, &xb, count);
+ xb_skip(error, &xb, count);
+ }
+ if (!referral) {
+ /* set the initial file handle to the directory's file handle */
+ xb_add_fh(error, &xbnew, np->n_fhp, np->n_fhsize);
+ }
+ /* copy/extend/skip fs locations */
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_FS_LOCATIONS)) {
+ numlocs = numserv = numaddr = numcomp = 0;
+ if (referral) /* don't copy the fs locations for a referral */
+ skipcopy = 1;
+ xb_copy_32(error, &xb, &xbnew, numlocs); /* location count */
+ for (loc = 0; !error && (loc < numlocs); loc++) {
+ xb_copy_32(error, &xb, &xbnew, numserv); /* server count */
+ for (serv = 0; !error && (serv < numserv); serv++) {
+ xb_copy_opaque(error, &xb, &xbnew); /* server name */
+ xb_copy_32(error, &xb, &xbnew, numaddr); /* address count */
+ for (addr = 0; !error && (addr < numaddr); addr++)
+ xb_copy_opaque(error, &xb, &xbnew); /* address */
+ xb_copy_opaque(error, &xb, &xbnew); /* server info */
+ }
+ /* pathname */
+ xb_get_32(error, &xb, numcomp); /* component count */
+ if (!skipcopy)
+ xb_add_32(error, &xbnew, numcomp+relpathcomps); /* new component count */
+ for (comp = 0; !error && (comp < numcomp); comp++)
+ xb_copy_opaque(error, &xb, &xbnew); /* component */
+ /* add additional components */
+ for (comp = 0; !skipcopy && !error && (comp < relpathcomps); comp++) {
+ p = relpath;
+ while (*p && (*p == '/'))
+ p++;
+ while (*p && !error) {
+ cp = p;
+ while (*p && (*p != '/'))
+ p++;
+ xb_add_string(error, &xbnew, cp, (p - cp)); /* component */
+ while (*p && (*p == '/'))
+ p++;
+ }
+ }
+ xb_copy_opaque(error, &xb, &xbnew); /* fs location info */
+ }
+ if (referral)
+ skipcopy = 0;
+ }
+ if (referral) {
+ /* add referral's fs locations */
+ xb_add_32(error, &xbnew, nfsls.nl_numlocs); /* FS_LOCATIONS */
+ for (loc = 0; !error && (loc < nfsls.nl_numlocs); loc++) {
+ xb_add_32(error, &xbnew, nfsls.nl_locations[loc]->nl_servcount);
+ for (serv = 0; !error && (serv < nfsls.nl_locations[loc]->nl_servcount); serv++) {
+ xb_add_string(error, &xbnew, nfsls.nl_locations[loc]->nl_servers[serv]->ns_name,
+ strlen(nfsls.nl_locations[loc]->nl_servers[serv]->ns_name));
+ xb_add_32(error, &xbnew, nfsls.nl_locations[loc]->nl_servers[serv]->ns_addrcount);
+ for (addr = 0; !error && (addr < nfsls.nl_locations[loc]->nl_servers[serv]->ns_addrcount); addr++)
+ xb_add_string(error, &xbnew, nfsls.nl_locations[loc]->nl_servers[serv]->ns_addresses[addr],
+ strlen(nfsls.nl_locations[loc]->nl_servers[serv]->ns_addresses[addr]));
+ xb_add_32(error, &xbnew, 0); /* empty server info */
+ }
+ xb_add_32(error, &xbnew, nfsls.nl_locations[loc]->nl_path.np_compcount);
+ for (comp = 0; !error && (comp < nfsls.nl_locations[loc]->nl_path.np_compcount); comp++)
+ xb_add_string(error, &xbnew, nfsls.nl_locations[loc]->nl_path.np_components[comp],
+ strlen(nfsls.nl_locations[loc]->nl_path.np_components[comp]));
+ xb_add_32(error, &xbnew, 0); /* empty fs location info */
+ }
+ }
+ if (NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MNTFLAGS))
+ xb_get_32(error, &xb, mntflags);
+ /*
+ * We add the following mount flags to the ones for the mounted-on mount:
+ * MNT_DONTBROWSE - to keep the mount from showing up as a separate volume
+ * MNT_AUTOMOUNTED - to keep DiskArb from retriggering the mount after
+ * an unmount (looking for /.autodiskmounted)
+ */
+ mntflags |= (MNT_AUTOMOUNTED | MNT_DONTBROWSE);
+ xb_add_32(error, &xbnew, mntflags);
+ if (!referral && NFS_BITMAP_ISSET(mattrs, NFS_MATTR_MNTFROM)) {
+ /* copy mntfrom string and add relpath */
+ rlen = strlen(relpath);
+ xb_get_32(error, &xb, mlen);
+ nfsmerr_if(error);
+ mlen2 = mlen + ((relpath[0] != '/') ? 1 : 0) + rlen;
+ xb_add_32(error, &xbnew, mlen2);
+ count = mlen/XDRWORD;
+ /* copy the original string */
+ while (count-- > 0)
+ xb_copy_32(error, &xb, &xbnew, val);
+ if (!error && (mlen % XDRWORD)) {
+ error = xb_get_bytes(&xb, buf, mlen%XDRWORD, 0);
+ if (!error)
+ error = xb_add_bytes(&xbnew, buf, mlen%XDRWORD, 1);
+ }
+ /* insert a '/' if the relative path doesn't start with one */
+ if (!error && (relpath[0] != '/')) {
+ buf[0] = '/';
+ error = xb_add_bytes(&xbnew, buf, 1, 1);
+ }
+ /* add the additional relative path */
+ if (!error)
+ error = xb_add_bytes(&xbnew, relpath, rlen, 1);
+ /* make sure the resulting string has the right number of pad bytes */
+ if (!error && (mlen2 != nfsm_rndup(mlen2))) {
+ bzero(buf, sizeof(buf));
+ count = nfsm_rndup(mlen2) - mlen2;
+ error = xb_add_bytes(&xbnew, buf, count, 1);
+ }
+ }
+ xb_build_done(error, &xbnew);
+
+ /* update opaque counts */
+ end_offset = xb_offset(&xbnew);
+ if (!error) {
+ error = xb_seek(&xbnew, argslength_offset);
+ argslength = end_offset - argslength_offset + XDRWORD/*version*/;
+ xb_add_32(error, &xbnew, argslength);
+ }
+ if (!error) {
+ error = xb_seek(&xbnew, attrslength_offset);
+ xb_add_32(error, &xbnew, end_offset - attrslength_offset - XDRWORD/*don't include length field*/);
+ }
+ nfsmerr_if(error);
+
+ /*
+ * For kernel_mount() call, use the existing mount flags (instead of the
+ * original flags) because flags like MNT_NOSUID and MNT_NODEV may have
+ * been silently enforced.
+ */
+ mntflags = vnode_vfsvisflags(vp);
+ mntflags |= (MNT_AUTOMOUNTED | MNT_DONTBROWSE);
+
+ /* do the mount */
+ error = kernel_mount(fstype, dvp, vp, path, xb_buffer_base(&xbnew), argslength,
+ mntflags, KERNEL_MOUNT_PERMIT_UNMOUNT | KERNEL_MOUNT_NOAUTH, ctx);
+
+nfsmerr:
+ if (error)
+ printf("nfs: mirror mount of %s on %s failed (%d)\n",
+ mntfromname, path, error);
+ /* clean up */
+ xb_cleanup(&xbnew);
+ if (referral)
+ nfs_fs_locations_cleanup(&nfsls);
+ if (path)
+ FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
+ if (mntfromname)
+ FREE_ZONE(mntfromname, MAXPATHLEN, M_NAMEI);
+ if (!error)
+ nfs_ephemeral_mount_harvester_start();
+ return (error);
+}
+
+/*
+ * trigger vnode functions
+ */
+
+resolver_result_t
+nfs_mirror_mount_trigger_resolve(
+ vnode_t vp,
+ const struct componentname *cnp,
+ enum path_operation pop,
+ __unused int flags,
+ __unused void *data,
+ vfs_context_t ctx)
+{
+ nfsnode_t np = VTONFS(vp);
+ vnode_t pvp = NULLVP;
+ int error = 0;
+ resolver_result_t result;
+
+ /*
+ * We have a trigger node that doesn't have anything mounted on it yet.
+ * We'll do the mount if either:
+ * (a) this isn't the last component of the path OR
+ * (b) this is an op that looks like it should trigger the mount.
+ */
+ if (cnp->cn_flags & ISLASTCN) {
+ switch (pop) {
+ case OP_MOUNT:
+ case OP_UNMOUNT:
+ case OP_STATFS:
+ case OP_LINK:
+ case OP_UNLINK:
+ case OP_RENAME:
+ case OP_MKNOD:
+ case OP_MKFIFO:
+ case OP_SYMLINK:
+ case OP_ACCESS:
+ case OP_GETATTR:
+ case OP_MKDIR:
+ case OP_RMDIR:
+ case OP_REVOKE:
+ case OP_GETXATTR:
+ case OP_LISTXATTR:
+ /* don't perform the mount for these operations */
+ result = vfs_resolver_result(np->n_trigseq, RESOLVER_NOCHANGE, 0);
+#ifdef NFS_TRIGGER_DEBUG
+ NP(np, "nfs trigger RESOLVE: no change, last %d nameiop %d, seq %d",
+ (cnp->cn_flags & ISLASTCN) ? 1 : 0, cnp->cn_nameiop, np->n_trigseq);
+#endif
+ return (result);
+ case OP_OPEN:
+ case OP_CHDIR:
+ case OP_CHROOT:
+ case OP_TRUNCATE:
+ case OP_COPYFILE:
+ case OP_PATHCONF:
+ case OP_READLINK:
+ case OP_SETATTR:
+ case OP_EXCHANGEDATA:
+ case OP_SEARCHFS:
+ case OP_FSCTL:
+ case OP_SETXATTR:
+ case OP_REMOVEXATTR:
+ default:
+ /* go ahead and do the mount */
+ break;
+ }
+ }
+
+ if (vnode_mountedhere(vp) != NULL) {
+ /*
+ * Um... there's already something mounted.
+ * Been there. Done that. Let's just say it succeeded.
+ */
+ error = 0;
+ goto skipmount;
+ }
+
+ if ((error = nfs_node_set_busy(np, vfs_context_thread(ctx)))) {
+ result = vfs_resolver_result(np->n_trigseq, RESOLVER_ERROR, error);
+#ifdef NFS_TRIGGER_DEBUG
+ NP(np, "nfs trigger RESOLVE: busy error %d, last %d nameiop %d, seq %d",
+ error, (cnp->cn_flags & ISLASTCN) ? 1 : 0, cnp->cn_nameiop, np->n_trigseq);
+#endif
+ return (result);
+ }
+
+ pvp = vnode_getparent(vp);
+ if (pvp == NULLVP)
+ error = EINVAL;
+ if (!error)
+ error = nfs_mirror_mount_domount(pvp, vp, ctx);
+skipmount:
+ if (!error)
+ np->n_trigseq++;
+ result = vfs_resolver_result(np->n_trigseq, error ? RESOLVER_ERROR : RESOLVER_RESOLVED, error);
+#ifdef NFS_TRIGGER_DEBUG
+ NP(np, "nfs trigger RESOLVE: %s %d, last %d nameiop %d, seq %d",
+ error ? "error" : "resolved", error,
+ (cnp->cn_flags & ISLASTCN) ? 1 : 0, cnp->cn_nameiop, np->n_trigseq);
+#endif
+
+ if (pvp != NULLVP)
+ vnode_put(pvp);
+ nfs_node_clear_busy(np);
+ return (result);
+}
projects / apple / xnu.git / blobdiff