11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfs/nfs3xdr.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * XDR functions to encode/decode NFSv3 RPC arguments and results. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (C) 1996, 1997 Olaf Kirch 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #include <linux/param.h> 101da177e4SLinus Torvalds #include <linux/time.h> 111da177e4SLinus Torvalds #include <linux/mm.h> 121da177e4SLinus Torvalds #include <linux/slab.h> 131da177e4SLinus Torvalds #include <linux/utsname.h> 141da177e4SLinus Torvalds #include <linux/errno.h> 151da177e4SLinus Torvalds #include <linux/string.h> 161da177e4SLinus Torvalds #include <linux/in.h> 171da177e4SLinus Torvalds #include <linux/pagemap.h> 181da177e4SLinus Torvalds #include <linux/proc_fs.h> 191da177e4SLinus Torvalds #include <linux/kdev_t.h> 201da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 211da177e4SLinus Torvalds #include <linux/nfs.h> 221da177e4SLinus Torvalds #include <linux/nfs3.h> 231da177e4SLinus Torvalds #include <linux/nfs_fs.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_XDR 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds /* Mapping from NFS error code to "errno" error code. */ 281da177e4SLinus Torvalds #define errno_NFSERR_IO EIO 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds extern int nfs_stat_to_errno(int); 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* 331da177e4SLinus Torvalds * Declare the space requirements for NFS arguments and replies as 341da177e4SLinus Torvalds * number of 32bit-words 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds #define NFS3_fhandle_sz (1+16) 371da177e4SLinus Torvalds #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ 381da177e4SLinus Torvalds #define NFS3_sattr_sz (15) 391da177e4SLinus Torvalds #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) 401da177e4SLinus Torvalds #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) 411da177e4SLinus Torvalds #define NFS3_fattr_sz (21) 421da177e4SLinus Torvalds #define NFS3_wcc_attr_sz (6) 431da177e4SLinus Torvalds #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) 441da177e4SLinus Torvalds #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) 451da177e4SLinus Torvalds #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) 461da177e4SLinus Torvalds #define NFS3_fsstat_sz 471da177e4SLinus Torvalds #define NFS3_fsinfo_sz 481da177e4SLinus Torvalds #define NFS3_pathconf_sz 491da177e4SLinus Torvalds #define NFS3_entry_sz (NFS3_filename_sz+3) 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds #define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) 521da177e4SLinus Torvalds #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) 531da177e4SLinus Torvalds #define NFS3_accessargs_sz (NFS3_fh_sz+1) 541da177e4SLinus Torvalds #define NFS3_readlinkargs_sz (NFS3_fh_sz) 551da177e4SLinus Torvalds #define NFS3_readargs_sz (NFS3_fh_sz+3) 561da177e4SLinus Torvalds #define NFS3_writeargs_sz (NFS3_fh_sz+5) 571da177e4SLinus Torvalds #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) 581da177e4SLinus Torvalds #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) 591da177e4SLinus Torvalds #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+NFS3_path_sz+NFS3_sattr_sz) 601da177e4SLinus Torvalds #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) 611da177e4SLinus Torvalds #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) 621da177e4SLinus Torvalds #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) 631da177e4SLinus Torvalds #define NFS3_readdirargs_sz (NFS3_fh_sz+2) 641da177e4SLinus Torvalds #define NFS3_commitargs_sz (NFS3_fh_sz+3) 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds #define NFS3_attrstat_sz (1+NFS3_fattr_sz) 671da177e4SLinus Torvalds #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) 681da177e4SLinus Torvalds #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) 691da177e4SLinus Torvalds #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) 701da177e4SLinus Torvalds #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) 711da177e4SLinus Torvalds #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) 721da177e4SLinus Torvalds #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) 731da177e4SLinus Torvalds #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) 741da177e4SLinus Torvalds #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) 751da177e4SLinus Torvalds #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) 761da177e4SLinus Torvalds #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) 771da177e4SLinus Torvalds #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) 781da177e4SLinus Torvalds #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) 791da177e4SLinus Torvalds #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) 801da177e4SLinus Torvalds #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds /* 831da177e4SLinus Torvalds * Map file type to S_IFMT bits 841da177e4SLinus Torvalds */ 851da177e4SLinus Torvalds static struct { 861da177e4SLinus Torvalds unsigned int mode; 871da177e4SLinus Torvalds unsigned int nfs2type; 881da177e4SLinus Torvalds } nfs_type2fmt[] = { 891da177e4SLinus Torvalds { 0, NFNON }, 901da177e4SLinus Torvalds { S_IFREG, NFREG }, 911da177e4SLinus Torvalds { S_IFDIR, NFDIR }, 921da177e4SLinus Torvalds { S_IFBLK, NFBLK }, 931da177e4SLinus Torvalds { S_IFCHR, NFCHR }, 941da177e4SLinus Torvalds { S_IFLNK, NFLNK }, 951da177e4SLinus Torvalds { S_IFSOCK, NFSOCK }, 961da177e4SLinus Torvalds { S_IFIFO, NFFIFO }, 971da177e4SLinus Torvalds { 0, NFBAD } 981da177e4SLinus Torvalds }; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds /* 1011da177e4SLinus Torvalds * Common NFS XDR functions as inlines 1021da177e4SLinus Torvalds */ 1031da177e4SLinus Torvalds static inline u32 * 1041da177e4SLinus Torvalds xdr_encode_fhandle(u32 *p, struct nfs_fh *fh) 1051da177e4SLinus Torvalds { 1061da177e4SLinus Torvalds return xdr_encode_array(p, fh->data, fh->size); 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static inline u32 * 1101da177e4SLinus Torvalds xdr_decode_fhandle(u32 *p, struct nfs_fh *fh) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { 1131da177e4SLinus Torvalds memcpy(fh->data, p, fh->size); 1141da177e4SLinus Torvalds return p + XDR_QUADLEN(fh->size); 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds return NULL; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* 1201da177e4SLinus Torvalds * Encode/decode time. 1211da177e4SLinus Torvalds */ 1221da177e4SLinus Torvalds static inline u32 * 1231da177e4SLinus Torvalds xdr_encode_time3(u32 *p, struct timespec *timep) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds *p++ = htonl(timep->tv_sec); 1261da177e4SLinus Torvalds *p++ = htonl(timep->tv_nsec); 1271da177e4SLinus Torvalds return p; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds static inline u32 * 1311da177e4SLinus Torvalds xdr_decode_time3(u32 *p, struct timespec *timep) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds timep->tv_sec = ntohl(*p++); 1341da177e4SLinus Torvalds timep->tv_nsec = ntohl(*p++); 1351da177e4SLinus Torvalds return p; 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds static u32 * 1391da177e4SLinus Torvalds xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr) 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds unsigned int type, major, minor; 1421da177e4SLinus Torvalds int fmode; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds type = ntohl(*p++); 1451da177e4SLinus Torvalds if (type >= NF3BAD) 1461da177e4SLinus Torvalds type = NF3BAD; 1471da177e4SLinus Torvalds fmode = nfs_type2fmt[type].mode; 1481da177e4SLinus Torvalds fattr->type = nfs_type2fmt[type].nfs2type; 1491da177e4SLinus Torvalds fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; 1501da177e4SLinus Torvalds fattr->nlink = ntohl(*p++); 1511da177e4SLinus Torvalds fattr->uid = ntohl(*p++); 1521da177e4SLinus Torvalds fattr->gid = ntohl(*p++); 1531da177e4SLinus Torvalds p = xdr_decode_hyper(p, &fattr->size); 1541da177e4SLinus Torvalds p = xdr_decode_hyper(p, &fattr->du.nfs3.used); 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds /* Turn remote device info into Linux-specific dev_t */ 1571da177e4SLinus Torvalds major = ntohl(*p++); 1581da177e4SLinus Torvalds minor = ntohl(*p++); 1591da177e4SLinus Torvalds fattr->rdev = MKDEV(major, minor); 1601da177e4SLinus Torvalds if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) 1611da177e4SLinus Torvalds fattr->rdev = 0; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds p = xdr_decode_hyper(p, &fattr->fsid_u.nfs3); 1641da177e4SLinus Torvalds p = xdr_decode_hyper(p, &fattr->fileid); 1651da177e4SLinus Torvalds p = xdr_decode_time3(p, &fattr->atime); 1661da177e4SLinus Torvalds p = xdr_decode_time3(p, &fattr->mtime); 1671da177e4SLinus Torvalds p = xdr_decode_time3(p, &fattr->ctime); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Update the mode bits */ 1701da177e4SLinus Torvalds fattr->valid |= (NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3); 1711da177e4SLinus Torvalds fattr->timestamp = jiffies; 1721da177e4SLinus Torvalds return p; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static inline u32 * 1761da177e4SLinus Torvalds xdr_encode_sattr(u32 *p, struct iattr *attr) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds if (attr->ia_valid & ATTR_MODE) { 1791da177e4SLinus Torvalds *p++ = xdr_one; 1801da177e4SLinus Torvalds *p++ = htonl(attr->ia_mode); 1811da177e4SLinus Torvalds } else { 1821da177e4SLinus Torvalds *p++ = xdr_zero; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds if (attr->ia_valid & ATTR_UID) { 1851da177e4SLinus Torvalds *p++ = xdr_one; 1861da177e4SLinus Torvalds *p++ = htonl(attr->ia_uid); 1871da177e4SLinus Torvalds } else { 1881da177e4SLinus Torvalds *p++ = xdr_zero; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds if (attr->ia_valid & ATTR_GID) { 1911da177e4SLinus Torvalds *p++ = xdr_one; 1921da177e4SLinus Torvalds *p++ = htonl(attr->ia_gid); 1931da177e4SLinus Torvalds } else { 1941da177e4SLinus Torvalds *p++ = xdr_zero; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds if (attr->ia_valid & ATTR_SIZE) { 1971da177e4SLinus Torvalds *p++ = xdr_one; 1981da177e4SLinus Torvalds p = xdr_encode_hyper(p, (__u64) attr->ia_size); 1991da177e4SLinus Torvalds } else { 2001da177e4SLinus Torvalds *p++ = xdr_zero; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds if (attr->ia_valid & ATTR_ATIME_SET) { 2031da177e4SLinus Torvalds *p++ = xdr_two; 2041da177e4SLinus Torvalds p = xdr_encode_time3(p, &attr->ia_atime); 2051da177e4SLinus Torvalds } else if (attr->ia_valid & ATTR_ATIME) { 2061da177e4SLinus Torvalds *p++ = xdr_one; 2071da177e4SLinus Torvalds } else { 2081da177e4SLinus Torvalds *p++ = xdr_zero; 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds if (attr->ia_valid & ATTR_MTIME_SET) { 2111da177e4SLinus Torvalds *p++ = xdr_two; 2121da177e4SLinus Torvalds p = xdr_encode_time3(p, &attr->ia_mtime); 2131da177e4SLinus Torvalds } else if (attr->ia_valid & ATTR_MTIME) { 2141da177e4SLinus Torvalds *p++ = xdr_one; 2151da177e4SLinus Torvalds } else { 2161da177e4SLinus Torvalds *p++ = xdr_zero; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds return p; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static inline u32 * 2221da177e4SLinus Torvalds xdr_decode_wcc_attr(u32 *p, struct nfs_fattr *fattr) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds p = xdr_decode_hyper(p, &fattr->pre_size); 2251da177e4SLinus Torvalds p = xdr_decode_time3(p, &fattr->pre_mtime); 2261da177e4SLinus Torvalds p = xdr_decode_time3(p, &fattr->pre_ctime); 2271da177e4SLinus Torvalds fattr->valid |= NFS_ATTR_WCC; 2281da177e4SLinus Torvalds return p; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds static inline u32 * 2321da177e4SLinus Torvalds xdr_decode_post_op_attr(u32 *p, struct nfs_fattr *fattr) 2331da177e4SLinus Torvalds { 2341da177e4SLinus Torvalds if (*p++) 2351da177e4SLinus Torvalds p = xdr_decode_fattr(p, fattr); 2361da177e4SLinus Torvalds return p; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds static inline u32 * 2401da177e4SLinus Torvalds xdr_decode_pre_op_attr(u32 *p, struct nfs_fattr *fattr) 2411da177e4SLinus Torvalds { 2421da177e4SLinus Torvalds if (*p++) 2431da177e4SLinus Torvalds return xdr_decode_wcc_attr(p, fattr); 2441da177e4SLinus Torvalds return p; 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds static inline u32 * 2491da177e4SLinus Torvalds xdr_decode_wcc_data(u32 *p, struct nfs_fattr *fattr) 2501da177e4SLinus Torvalds { 2511da177e4SLinus Torvalds p = xdr_decode_pre_op_attr(p, fattr); 2521da177e4SLinus Torvalds return xdr_decode_post_op_attr(p, fattr); 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds /* 2561da177e4SLinus Torvalds * NFS encode functions 2571da177e4SLinus Torvalds */ 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds /* 2601da177e4SLinus Torvalds * Encode file handle argument 2611da177e4SLinus Torvalds */ 2621da177e4SLinus Torvalds static int 2631da177e4SLinus Torvalds nfs3_xdr_fhandle(struct rpc_rqst *req, u32 *p, struct nfs_fh *fh) 2641da177e4SLinus Torvalds { 2651da177e4SLinus Torvalds p = xdr_encode_fhandle(p, fh); 2661da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 2671da177e4SLinus Torvalds return 0; 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds /* 2711da177e4SLinus Torvalds * Encode SETATTR arguments 2721da177e4SLinus Torvalds */ 2731da177e4SLinus Torvalds static int 2741da177e4SLinus Torvalds nfs3_xdr_sattrargs(struct rpc_rqst *req, u32 *p, struct nfs3_sattrargs *args) 2751da177e4SLinus Torvalds { 2761da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 2771da177e4SLinus Torvalds p = xdr_encode_sattr(p, args->sattr); 2781da177e4SLinus Torvalds *p++ = htonl(args->guard); 2791da177e4SLinus Torvalds if (args->guard) 2801da177e4SLinus Torvalds p = xdr_encode_time3(p, &args->guardtime); 2811da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 2821da177e4SLinus Torvalds return 0; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* 2861da177e4SLinus Torvalds * Encode directory ops argument 2871da177e4SLinus Torvalds */ 2881da177e4SLinus Torvalds static int 2891da177e4SLinus Torvalds nfs3_xdr_diropargs(struct rpc_rqst *req, u32 *p, struct nfs3_diropargs *args) 2901da177e4SLinus Torvalds { 2911da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 2921da177e4SLinus Torvalds p = xdr_encode_array(p, args->name, args->len); 2931da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 2941da177e4SLinus Torvalds return 0; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds /* 2981da177e4SLinus Torvalds * Encode access() argument 2991da177e4SLinus Torvalds */ 3001da177e4SLinus Torvalds static int 3011da177e4SLinus Torvalds nfs3_xdr_accessargs(struct rpc_rqst *req, u32 *p, struct nfs3_accessargs *args) 3021da177e4SLinus Torvalds { 3031da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 3041da177e4SLinus Torvalds *p++ = htonl(args->access); 3051da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 3061da177e4SLinus Torvalds return 0; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds /* 3101da177e4SLinus Torvalds * Arguments to a READ call. Since we read data directly into the page 3111da177e4SLinus Torvalds * cache, we also set up the reply iovec here so that iov[1] points 3121da177e4SLinus Torvalds * exactly to the page we want to fetch. 3131da177e4SLinus Torvalds */ 3141da177e4SLinus Torvalds static int 3151da177e4SLinus Torvalds nfs3_xdr_readargs(struct rpc_rqst *req, u32 *p, struct nfs_readargs *args) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds struct rpc_auth *auth = req->rq_task->tk_auth; 3181da177e4SLinus Torvalds unsigned int replen; 3191da177e4SLinus Torvalds u32 count = args->count; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 3221da177e4SLinus Torvalds p = xdr_encode_hyper(p, args->offset); 3231da177e4SLinus Torvalds *p++ = htonl(count); 3241da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* Inline the page array */ 3271da177e4SLinus Torvalds replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2; 3281da177e4SLinus Torvalds xdr_inline_pages(&req->rq_rcv_buf, replen, 3291da177e4SLinus Torvalds args->pages, args->pgbase, count); 3301da177e4SLinus Torvalds return 0; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds /* 3341da177e4SLinus Torvalds * Write arguments. Splice the buffer to be written into the iovec. 3351da177e4SLinus Torvalds */ 3361da177e4SLinus Torvalds static int 3371da177e4SLinus Torvalds nfs3_xdr_writeargs(struct rpc_rqst *req, u32 *p, struct nfs_writeargs *args) 3381da177e4SLinus Torvalds { 3391da177e4SLinus Torvalds struct xdr_buf *sndbuf = &req->rq_snd_buf; 3401da177e4SLinus Torvalds u32 count = args->count; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 3431da177e4SLinus Torvalds p = xdr_encode_hyper(p, args->offset); 3441da177e4SLinus Torvalds *p++ = htonl(count); 3451da177e4SLinus Torvalds *p++ = htonl(args->stable); 3461da177e4SLinus Torvalds *p++ = htonl(count); 3471da177e4SLinus Torvalds sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds /* Copy the page array */ 3501da177e4SLinus Torvalds xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); 3511da177e4SLinus Torvalds return 0; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* 3551da177e4SLinus Torvalds * Encode CREATE arguments 3561da177e4SLinus Torvalds */ 3571da177e4SLinus Torvalds static int 3581da177e4SLinus Torvalds nfs3_xdr_createargs(struct rpc_rqst *req, u32 *p, struct nfs3_createargs *args) 3591da177e4SLinus Torvalds { 3601da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 3611da177e4SLinus Torvalds p = xdr_encode_array(p, args->name, args->len); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds *p++ = htonl(args->createmode); 3641da177e4SLinus Torvalds if (args->createmode == NFS3_CREATE_EXCLUSIVE) { 3651da177e4SLinus Torvalds *p++ = args->verifier[0]; 3661da177e4SLinus Torvalds *p++ = args->verifier[1]; 3671da177e4SLinus Torvalds } else 3681da177e4SLinus Torvalds p = xdr_encode_sattr(p, args->sattr); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 3711da177e4SLinus Torvalds return 0; 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds /* 3751da177e4SLinus Torvalds * Encode MKDIR arguments 3761da177e4SLinus Torvalds */ 3771da177e4SLinus Torvalds static int 3781da177e4SLinus Torvalds nfs3_xdr_mkdirargs(struct rpc_rqst *req, u32 *p, struct nfs3_mkdirargs *args) 3791da177e4SLinus Torvalds { 3801da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 3811da177e4SLinus Torvalds p = xdr_encode_array(p, args->name, args->len); 3821da177e4SLinus Torvalds p = xdr_encode_sattr(p, args->sattr); 3831da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 3841da177e4SLinus Torvalds return 0; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* 3881da177e4SLinus Torvalds * Encode SYMLINK arguments 3891da177e4SLinus Torvalds */ 3901da177e4SLinus Torvalds static int 3911da177e4SLinus Torvalds nfs3_xdr_symlinkargs(struct rpc_rqst *req, u32 *p, struct nfs3_symlinkargs *args) 3921da177e4SLinus Torvalds { 3931da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fromfh); 3941da177e4SLinus Torvalds p = xdr_encode_array(p, args->fromname, args->fromlen); 3951da177e4SLinus Torvalds p = xdr_encode_sattr(p, args->sattr); 3961da177e4SLinus Torvalds p = xdr_encode_array(p, args->topath, args->tolen); 3971da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 3981da177e4SLinus Torvalds return 0; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* 4021da177e4SLinus Torvalds * Encode MKNOD arguments 4031da177e4SLinus Torvalds */ 4041da177e4SLinus Torvalds static int 4051da177e4SLinus Torvalds nfs3_xdr_mknodargs(struct rpc_rqst *req, u32 *p, struct nfs3_mknodargs *args) 4061da177e4SLinus Torvalds { 4071da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 4081da177e4SLinus Torvalds p = xdr_encode_array(p, args->name, args->len); 4091da177e4SLinus Torvalds *p++ = htonl(args->type); 4101da177e4SLinus Torvalds p = xdr_encode_sattr(p, args->sattr); 4111da177e4SLinus Torvalds if (args->type == NF3CHR || args->type == NF3BLK) { 4121da177e4SLinus Torvalds *p++ = htonl(MAJOR(args->rdev)); 4131da177e4SLinus Torvalds *p++ = htonl(MINOR(args->rdev)); 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 4171da177e4SLinus Torvalds return 0; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* 4211da177e4SLinus Torvalds * Encode RENAME arguments 4221da177e4SLinus Torvalds */ 4231da177e4SLinus Torvalds static int 4241da177e4SLinus Torvalds nfs3_xdr_renameargs(struct rpc_rqst *req, u32 *p, struct nfs3_renameargs *args) 4251da177e4SLinus Torvalds { 4261da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fromfh); 4271da177e4SLinus Torvalds p = xdr_encode_array(p, args->fromname, args->fromlen); 4281da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->tofh); 4291da177e4SLinus Torvalds p = xdr_encode_array(p, args->toname, args->tolen); 4301da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 4311da177e4SLinus Torvalds return 0; 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds /* 4351da177e4SLinus Torvalds * Encode LINK arguments 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds static int 4381da177e4SLinus Torvalds nfs3_xdr_linkargs(struct rpc_rqst *req, u32 *p, struct nfs3_linkargs *args) 4391da177e4SLinus Torvalds { 4401da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fromfh); 4411da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->tofh); 4421da177e4SLinus Torvalds p = xdr_encode_array(p, args->toname, args->tolen); 4431da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 4441da177e4SLinus Torvalds return 0; 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds /* 4481da177e4SLinus Torvalds * Encode arguments to readdir call 4491da177e4SLinus Torvalds */ 4501da177e4SLinus Torvalds static int 4511da177e4SLinus Torvalds nfs3_xdr_readdirargs(struct rpc_rqst *req, u32 *p, struct nfs3_readdirargs *args) 4521da177e4SLinus Torvalds { 4531da177e4SLinus Torvalds struct rpc_auth *auth = req->rq_task->tk_auth; 4541da177e4SLinus Torvalds unsigned int replen; 4551da177e4SLinus Torvalds u32 count = args->count; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 4581da177e4SLinus Torvalds p = xdr_encode_hyper(p, args->cookie); 4591da177e4SLinus Torvalds *p++ = args->verf[0]; 4601da177e4SLinus Torvalds *p++ = args->verf[1]; 4611da177e4SLinus Torvalds if (args->plus) { 4621da177e4SLinus Torvalds /* readdirplus: need dircount + buffer size. 4631da177e4SLinus Torvalds * We just make sure we make dircount big enough */ 4641da177e4SLinus Torvalds *p++ = htonl(count >> 3); 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds *p++ = htonl(count); 4671da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds /* Inline the page array */ 4701da177e4SLinus Torvalds replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2; 4711da177e4SLinus Torvalds xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); 4721da177e4SLinus Torvalds return 0; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds /* 4761da177e4SLinus Torvalds * Decode the result of a readdir call. 4771da177e4SLinus Torvalds * We just check for syntactical correctness. 4781da177e4SLinus Torvalds */ 4791da177e4SLinus Torvalds static int 4801da177e4SLinus Torvalds nfs3_xdr_readdirres(struct rpc_rqst *req, u32 *p, struct nfs3_readdirres *res) 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 4831da177e4SLinus Torvalds struct kvec *iov = rcvbuf->head; 4841da177e4SLinus Torvalds struct page **page; 4851da177e4SLinus Torvalds int hdrlen, recvd; 4861da177e4SLinus Torvalds int status, nr; 4871da177e4SLinus Torvalds unsigned int len, pglen; 4881da177e4SLinus Torvalds u32 *entry, *end, *kaddr; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds status = ntohl(*p++); 4911da177e4SLinus Torvalds /* Decode post_op_attrs */ 4921da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->dir_attr); 4931da177e4SLinus Torvalds if (status) 4941da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 4951da177e4SLinus Torvalds /* Decode verifier cookie */ 4961da177e4SLinus Torvalds if (res->verf) { 4971da177e4SLinus Torvalds res->verf[0] = *p++; 4981da177e4SLinus Torvalds res->verf[1] = *p++; 4991da177e4SLinus Torvalds } else { 5001da177e4SLinus Torvalds p += 2; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds hdrlen = (u8 *) p - (u8 *) iov->iov_base; 5041da177e4SLinus Torvalds if (iov->iov_len < hdrlen) { 5051da177e4SLinus Torvalds printk(KERN_WARNING "NFS: READDIR reply header overflowed:" 5061da177e4SLinus Torvalds "length %d > %Zu\n", hdrlen, iov->iov_len); 5071da177e4SLinus Torvalds return -errno_NFSERR_IO; 5081da177e4SLinus Torvalds } else if (iov->iov_len != hdrlen) { 5091da177e4SLinus Torvalds dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); 5101da177e4SLinus Torvalds xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds pglen = rcvbuf->page_len; 5141da177e4SLinus Torvalds recvd = rcvbuf->len - hdrlen; 5151da177e4SLinus Torvalds if (pglen > recvd) 5161da177e4SLinus Torvalds pglen = recvd; 5171da177e4SLinus Torvalds page = rcvbuf->pages; 5181da177e4SLinus Torvalds kaddr = p = (u32 *)kmap_atomic(*page, KM_USER0); 5191da177e4SLinus Torvalds end = (u32 *)((char *)p + pglen); 5201da177e4SLinus Torvalds entry = p; 5211da177e4SLinus Torvalds for (nr = 0; *p++; nr++) { 5221da177e4SLinus Torvalds if (p + 3 > end) 5231da177e4SLinus Torvalds goto short_pkt; 5241da177e4SLinus Torvalds p += 2; /* inode # */ 5251da177e4SLinus Torvalds len = ntohl(*p++); /* string length */ 5261da177e4SLinus Torvalds p += XDR_QUADLEN(len) + 2; /* name + cookie */ 5271da177e4SLinus Torvalds if (len > NFS3_MAXNAMLEN) { 5281da177e4SLinus Torvalds printk(KERN_WARNING "NFS: giant filename in readdir (len %x)!\n", 5291da177e4SLinus Torvalds len); 5301da177e4SLinus Torvalds goto err_unmap; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds if (res->plus) { 5341da177e4SLinus Torvalds /* post_op_attr */ 5351da177e4SLinus Torvalds if (p + 2 > end) 5361da177e4SLinus Torvalds goto short_pkt; 5371da177e4SLinus Torvalds if (*p++) { 5381da177e4SLinus Torvalds p += 21; 5391da177e4SLinus Torvalds if (p + 1 > end) 5401da177e4SLinus Torvalds goto short_pkt; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds /* post_op_fh3 */ 5431da177e4SLinus Torvalds if (*p++) { 5441da177e4SLinus Torvalds if (p + 1 > end) 5451da177e4SLinus Torvalds goto short_pkt; 5461da177e4SLinus Torvalds len = ntohl(*p++); 5471da177e4SLinus Torvalds if (len > NFS3_FHSIZE) { 5481da177e4SLinus Torvalds printk(KERN_WARNING "NFS: giant filehandle in " 5491da177e4SLinus Torvalds "readdir (len %x)!\n", len); 5501da177e4SLinus Torvalds goto err_unmap; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds p += XDR_QUADLEN(len); 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds if (p + 2 > end) 5571da177e4SLinus Torvalds goto short_pkt; 5581da177e4SLinus Torvalds entry = p; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds if (!nr && (entry[0] != 0 || entry[1] == 0)) 5611da177e4SLinus Torvalds goto short_pkt; 5621da177e4SLinus Torvalds out: 5631da177e4SLinus Torvalds kunmap_atomic(kaddr, KM_USER0); 5641da177e4SLinus Torvalds return nr; 5651da177e4SLinus Torvalds short_pkt: 5661da177e4SLinus Torvalds entry[0] = entry[1] = 0; 5671da177e4SLinus Torvalds /* truncate listing ? */ 5681da177e4SLinus Torvalds if (!nr) { 5691da177e4SLinus Torvalds printk(KERN_NOTICE "NFS: readdir reply truncated!\n"); 5701da177e4SLinus Torvalds entry[1] = 1; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds goto out; 5731da177e4SLinus Torvalds err_unmap: 5741da177e4SLinus Torvalds nr = -errno_NFSERR_IO; 5751da177e4SLinus Torvalds goto out; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds u32 * 5791da177e4SLinus Torvalds nfs3_decode_dirent(u32 *p, struct nfs_entry *entry, int plus) 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds struct nfs_entry old = *entry; 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds if (!*p++) { 5841da177e4SLinus Torvalds if (!*p) 5851da177e4SLinus Torvalds return ERR_PTR(-EAGAIN); 5861da177e4SLinus Torvalds entry->eof = 1; 5871da177e4SLinus Torvalds return ERR_PTR(-EBADCOOKIE); 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds p = xdr_decode_hyper(p, &entry->ino); 5911da177e4SLinus Torvalds entry->len = ntohl(*p++); 5921da177e4SLinus Torvalds entry->name = (const char *) p; 5931da177e4SLinus Torvalds p += XDR_QUADLEN(entry->len); 5941da177e4SLinus Torvalds entry->prev_cookie = entry->cookie; 5951da177e4SLinus Torvalds p = xdr_decode_hyper(p, &entry->cookie); 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds if (plus) { 5981da177e4SLinus Torvalds entry->fattr->valid = 0; 5991da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, entry->fattr); 6001da177e4SLinus Torvalds /* In fact, a post_op_fh3: */ 6011da177e4SLinus Torvalds if (*p++) { 6021da177e4SLinus Torvalds p = xdr_decode_fhandle(p, entry->fh); 6031da177e4SLinus Torvalds /* Ugh -- server reply was truncated */ 6041da177e4SLinus Torvalds if (p == NULL) { 6051da177e4SLinus Torvalds dprintk("NFS: FH truncated\n"); 6061da177e4SLinus Torvalds *entry = old; 6071da177e4SLinus Torvalds return ERR_PTR(-EAGAIN); 6081da177e4SLinus Torvalds } 6091da177e4SLinus Torvalds } else 6101da177e4SLinus Torvalds memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds entry->eof = !p[0] && p[1]; 6141da177e4SLinus Torvalds return p; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds /* 6181da177e4SLinus Torvalds * Encode COMMIT arguments 6191da177e4SLinus Torvalds */ 6201da177e4SLinus Torvalds static int 6211da177e4SLinus Torvalds nfs3_xdr_commitargs(struct rpc_rqst *req, u32 *p, struct nfs_writeargs *args) 6221da177e4SLinus Torvalds { 6231da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 6241da177e4SLinus Torvalds p = xdr_encode_hyper(p, args->offset); 6251da177e4SLinus Torvalds *p++ = htonl(args->count); 6261da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 6271da177e4SLinus Torvalds return 0; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* 6311da177e4SLinus Torvalds * NFS XDR decode functions 6321da177e4SLinus Torvalds */ 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds /* 6351da177e4SLinus Torvalds * Decode attrstat reply. 6361da177e4SLinus Torvalds */ 6371da177e4SLinus Torvalds static int 6381da177e4SLinus Torvalds nfs3_xdr_attrstat(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr) 6391da177e4SLinus Torvalds { 6401da177e4SLinus Torvalds int status; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds if ((status = ntohl(*p++))) 6431da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 6441da177e4SLinus Torvalds xdr_decode_fattr(p, fattr); 6451da177e4SLinus Torvalds return 0; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds /* 6491da177e4SLinus Torvalds * Decode status+wcc_data reply 6501da177e4SLinus Torvalds * SATTR, REMOVE, RMDIR 6511da177e4SLinus Torvalds */ 6521da177e4SLinus Torvalds static int 6531da177e4SLinus Torvalds nfs3_xdr_wccstat(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr) 6541da177e4SLinus Torvalds { 6551da177e4SLinus Torvalds int status; 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds if ((status = ntohl(*p++))) 6581da177e4SLinus Torvalds status = -nfs_stat_to_errno(status); 6591da177e4SLinus Torvalds xdr_decode_wcc_data(p, fattr); 6601da177e4SLinus Torvalds return status; 6611da177e4SLinus Torvalds } 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds /* 6641da177e4SLinus Torvalds * Decode LOOKUP reply 6651da177e4SLinus Torvalds */ 6661da177e4SLinus Torvalds static int 6671da177e4SLinus Torvalds nfs3_xdr_lookupres(struct rpc_rqst *req, u32 *p, struct nfs3_diropres *res) 6681da177e4SLinus Torvalds { 6691da177e4SLinus Torvalds int status; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds if ((status = ntohl(*p++))) { 6721da177e4SLinus Torvalds status = -nfs_stat_to_errno(status); 6731da177e4SLinus Torvalds } else { 6741da177e4SLinus Torvalds if (!(p = xdr_decode_fhandle(p, res->fh))) 6751da177e4SLinus Torvalds return -errno_NFSERR_IO; 6761da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds xdr_decode_post_op_attr(p, res->dir_attr); 6791da177e4SLinus Torvalds return status; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /* 6831da177e4SLinus Torvalds * Decode ACCESS reply 6841da177e4SLinus Torvalds */ 6851da177e4SLinus Torvalds static int 6861da177e4SLinus Torvalds nfs3_xdr_accessres(struct rpc_rqst *req, u32 *p, struct nfs3_accessres *res) 6871da177e4SLinus Torvalds { 6881da177e4SLinus Torvalds int status = ntohl(*p++); 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 6911da177e4SLinus Torvalds if (status) 6921da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 6931da177e4SLinus Torvalds res->access = ntohl(*p++); 6941da177e4SLinus Torvalds return 0; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds static int 6981da177e4SLinus Torvalds nfs3_xdr_readlinkargs(struct rpc_rqst *req, u32 *p, struct nfs3_readlinkargs *args) 6991da177e4SLinus Torvalds { 7001da177e4SLinus Torvalds struct rpc_auth *auth = req->rq_task->tk_auth; 7011da177e4SLinus Torvalds unsigned int replen; 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds p = xdr_encode_fhandle(p, args->fh); 7041da177e4SLinus Torvalds req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds /* Inline the page array */ 7071da177e4SLinus Torvalds replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2; 7081da177e4SLinus Torvalds xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); 7091da177e4SLinus Torvalds return 0; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds /* 7131da177e4SLinus Torvalds * Decode READLINK reply 7141da177e4SLinus Torvalds */ 7151da177e4SLinus Torvalds static int 7161da177e4SLinus Torvalds nfs3_xdr_readlinkres(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr) 7171da177e4SLinus Torvalds { 7181da177e4SLinus Torvalds struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 7191da177e4SLinus Torvalds struct kvec *iov = rcvbuf->head; 7201da177e4SLinus Torvalds int hdrlen, len, recvd; 7211da177e4SLinus Torvalds char *kaddr; 7221da177e4SLinus Torvalds int status; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds status = ntohl(*p++); 7251da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, fattr); 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds if (status != 0) 7281da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds /* Convert length of symlink */ 7311da177e4SLinus Torvalds len = ntohl(*p++); 7321da177e4SLinus Torvalds if (len >= rcvbuf->page_len || len <= 0) { 7331da177e4SLinus Torvalds dprintk(KERN_WARNING "nfs: server returned giant symlink!\n"); 7341da177e4SLinus Torvalds return -ENAMETOOLONG; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds hdrlen = (u8 *) p - (u8 *) iov->iov_base; 7381da177e4SLinus Torvalds if (iov->iov_len < hdrlen) { 7391da177e4SLinus Torvalds printk(KERN_WARNING "NFS: READLINK reply header overflowed:" 7401da177e4SLinus Torvalds "length %d > %Zu\n", hdrlen, iov->iov_len); 7411da177e4SLinus Torvalds return -errno_NFSERR_IO; 7421da177e4SLinus Torvalds } else if (iov->iov_len != hdrlen) { 7431da177e4SLinus Torvalds dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); 7441da177e4SLinus Torvalds xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); 7451da177e4SLinus Torvalds } 7461da177e4SLinus Torvalds recvd = req->rq_rcv_buf.len - hdrlen; 7471da177e4SLinus Torvalds if (recvd < len) { 7481da177e4SLinus Torvalds printk(KERN_WARNING "NFS: server cheating in readlink reply: " 7491da177e4SLinus Torvalds "count %u > recvd %u\n", len, recvd); 7501da177e4SLinus Torvalds return -EIO; 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds /* NULL terminate the string we got */ 7541da177e4SLinus Torvalds kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0); 7551da177e4SLinus Torvalds kaddr[len+rcvbuf->page_base] = '\0'; 7561da177e4SLinus Torvalds kunmap_atomic(kaddr, KM_USER0); 7571da177e4SLinus Torvalds return 0; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds /* 7611da177e4SLinus Torvalds * Decode READ reply 7621da177e4SLinus Torvalds */ 7631da177e4SLinus Torvalds static int 7641da177e4SLinus Torvalds nfs3_xdr_readres(struct rpc_rqst *req, u32 *p, struct nfs_readres *res) 7651da177e4SLinus Torvalds { 7661da177e4SLinus Torvalds struct kvec *iov = req->rq_rcv_buf.head; 7671da177e4SLinus Torvalds int status, count, ocount, recvd, hdrlen; 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds status = ntohl(*p++); 7701da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds if (status != 0) 7731da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds /* Decode reply could and EOF flag. NFSv3 is somewhat redundant 7761da177e4SLinus Torvalds * in that it puts the count both in the res struct and in the 7771da177e4SLinus Torvalds * opaque data count. */ 7781da177e4SLinus Torvalds count = ntohl(*p++); 7791da177e4SLinus Torvalds res->eof = ntohl(*p++); 7801da177e4SLinus Torvalds ocount = ntohl(*p++); 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds if (ocount != count) { 7831da177e4SLinus Torvalds printk(KERN_WARNING "NFS: READ count doesn't match RPC opaque count.\n"); 7841da177e4SLinus Torvalds return -errno_NFSERR_IO; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds hdrlen = (u8 *) p - (u8 *) iov->iov_base; 7881da177e4SLinus Torvalds if (iov->iov_len < hdrlen) { 7891da177e4SLinus Torvalds printk(KERN_WARNING "NFS: READ reply header overflowed:" 7901da177e4SLinus Torvalds "length %d > %Zu\n", hdrlen, iov->iov_len); 7911da177e4SLinus Torvalds return -errno_NFSERR_IO; 7921da177e4SLinus Torvalds } else if (iov->iov_len != hdrlen) { 7931da177e4SLinus Torvalds dprintk("NFS: READ header is short. iovec will be shifted.\n"); 7941da177e4SLinus Torvalds xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds recvd = req->rq_rcv_buf.len - hdrlen; 7981da177e4SLinus Torvalds if (count > recvd) { 7991da177e4SLinus Torvalds printk(KERN_WARNING "NFS: server cheating in read reply: " 8001da177e4SLinus Torvalds "count %d > recvd %d\n", count, recvd); 8011da177e4SLinus Torvalds count = recvd; 8021da177e4SLinus Torvalds res->eof = 0; 8031da177e4SLinus Torvalds } 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds if (count < res->count) 8061da177e4SLinus Torvalds res->count = count; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds return count; 8091da177e4SLinus Torvalds } 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds /* 8121da177e4SLinus Torvalds * Decode WRITE response 8131da177e4SLinus Torvalds */ 8141da177e4SLinus Torvalds static int 8151da177e4SLinus Torvalds nfs3_xdr_writeres(struct rpc_rqst *req, u32 *p, struct nfs_writeres *res) 8161da177e4SLinus Torvalds { 8171da177e4SLinus Torvalds int status; 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds status = ntohl(*p++); 8201da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->fattr); 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds if (status != 0) 8231da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds res->count = ntohl(*p++); 8261da177e4SLinus Torvalds res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); 8271da177e4SLinus Torvalds res->verf->verifier[0] = *p++; 8281da177e4SLinus Torvalds res->verf->verifier[1] = *p++; 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds return res->count; 8311da177e4SLinus Torvalds } 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds /* 8341da177e4SLinus Torvalds * Decode a CREATE response 8351da177e4SLinus Torvalds */ 8361da177e4SLinus Torvalds static int 8371da177e4SLinus Torvalds nfs3_xdr_createres(struct rpc_rqst *req, u32 *p, struct nfs3_diropres *res) 8381da177e4SLinus Torvalds { 8391da177e4SLinus Torvalds int status; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds status = ntohl(*p++); 8421da177e4SLinus Torvalds if (status == 0) { 8431da177e4SLinus Torvalds if (*p++) { 8441da177e4SLinus Torvalds if (!(p = xdr_decode_fhandle(p, res->fh))) 8451da177e4SLinus Torvalds return -errno_NFSERR_IO; 8461da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 8471da177e4SLinus Torvalds } else { 8481da177e4SLinus Torvalds memset(res->fh, 0, sizeof(*res->fh)); 8491da177e4SLinus Torvalds /* Do decode post_op_attr but set it to NULL */ 8501da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 8511da177e4SLinus Torvalds res->fattr->valid = 0; 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds } else { 8541da177e4SLinus Torvalds status = -nfs_stat_to_errno(status); 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->dir_attr); 8571da177e4SLinus Torvalds return status; 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds /* 8611da177e4SLinus Torvalds * Decode RENAME reply 8621da177e4SLinus Torvalds */ 8631da177e4SLinus Torvalds static int 8641da177e4SLinus Torvalds nfs3_xdr_renameres(struct rpc_rqst *req, u32 *p, struct nfs3_renameres *res) 8651da177e4SLinus Torvalds { 8661da177e4SLinus Torvalds int status; 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds if ((status = ntohl(*p++)) != 0) 8691da177e4SLinus Torvalds status = -nfs_stat_to_errno(status); 8701da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->fromattr); 8711da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->toattr); 8721da177e4SLinus Torvalds return status; 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds /* 8761da177e4SLinus Torvalds * Decode LINK reply 8771da177e4SLinus Torvalds */ 8781da177e4SLinus Torvalds static int 8791da177e4SLinus Torvalds nfs3_xdr_linkres(struct rpc_rqst *req, u32 *p, struct nfs3_linkres *res) 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds int status; 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds if ((status = ntohl(*p++)) != 0) 8841da177e4SLinus Torvalds status = -nfs_stat_to_errno(status); 8851da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 8861da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->dir_attr); 8871da177e4SLinus Torvalds return status; 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds /* 8911da177e4SLinus Torvalds * Decode FSSTAT reply 8921da177e4SLinus Torvalds */ 8931da177e4SLinus Torvalds static int 8941da177e4SLinus Torvalds nfs3_xdr_fsstatres(struct rpc_rqst *req, u32 *p, struct nfs_fsstat *res) 8951da177e4SLinus Torvalds { 8961da177e4SLinus Torvalds int status; 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds status = ntohl(*p++); 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 9011da177e4SLinus Torvalds if (status != 0) 9021da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->tbytes); 9051da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->fbytes); 9061da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->abytes); 9071da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->tfiles); 9081da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->ffiles); 9091da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->afiles); 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds /* ignore invarsec */ 9121da177e4SLinus Torvalds return 0; 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds /* 9161da177e4SLinus Torvalds * Decode FSINFO reply 9171da177e4SLinus Torvalds */ 9181da177e4SLinus Torvalds static int 9191da177e4SLinus Torvalds nfs3_xdr_fsinfores(struct rpc_rqst *req, u32 *p, struct nfs_fsinfo *res) 9201da177e4SLinus Torvalds { 9211da177e4SLinus Torvalds int status; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds status = ntohl(*p++); 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 9261da177e4SLinus Torvalds if (status != 0) 9271da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds res->rtmax = ntohl(*p++); 9301da177e4SLinus Torvalds res->rtpref = ntohl(*p++); 9311da177e4SLinus Torvalds res->rtmult = ntohl(*p++); 9321da177e4SLinus Torvalds res->wtmax = ntohl(*p++); 9331da177e4SLinus Torvalds res->wtpref = ntohl(*p++); 9341da177e4SLinus Torvalds res->wtmult = ntohl(*p++); 9351da177e4SLinus Torvalds res->dtpref = ntohl(*p++); 9361da177e4SLinus Torvalds p = xdr_decode_hyper(p, &res->maxfilesize); 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds /* ignore time_delta and properties */ 9391da177e4SLinus Torvalds res->lease_time = 0; 9401da177e4SLinus Torvalds return 0; 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds /* 9441da177e4SLinus Torvalds * Decode PATHCONF reply 9451da177e4SLinus Torvalds */ 9461da177e4SLinus Torvalds static int 9471da177e4SLinus Torvalds nfs3_xdr_pathconfres(struct rpc_rqst *req, u32 *p, struct nfs_pathconf *res) 9481da177e4SLinus Torvalds { 9491da177e4SLinus Torvalds int status; 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds status = ntohl(*p++); 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds p = xdr_decode_post_op_attr(p, res->fattr); 9541da177e4SLinus Torvalds if (status != 0) 9551da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 9561da177e4SLinus Torvalds res->max_link = ntohl(*p++); 9571da177e4SLinus Torvalds res->max_namelen = ntohl(*p++); 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds /* ignore remaining fields */ 9601da177e4SLinus Torvalds return 0; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds /* 9641da177e4SLinus Torvalds * Decode COMMIT reply 9651da177e4SLinus Torvalds */ 9661da177e4SLinus Torvalds static int 9671da177e4SLinus Torvalds nfs3_xdr_commitres(struct rpc_rqst *req, u32 *p, struct nfs_writeres *res) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds int status; 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds status = ntohl(*p++); 9721da177e4SLinus Torvalds p = xdr_decode_wcc_data(p, res->fattr); 9731da177e4SLinus Torvalds if (status != 0) 9741da177e4SLinus Torvalds return -nfs_stat_to_errno(status); 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds res->verf->verifier[0] = *p++; 9771da177e4SLinus Torvalds res->verf->verifier[1] = *p++; 9781da177e4SLinus Torvalds return 0; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds #ifndef MAX 9821da177e4SLinus Torvalds # define MAX(a, b) (((a) > (b))? (a) : (b)) 9831da177e4SLinus Torvalds #endif 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds #define PROC(proc, argtype, restype, timer) \ 9861da177e4SLinus Torvalds [NFS3PROC_##proc] = { \ 9871da177e4SLinus Torvalds .p_proc = NFS3PROC_##proc, \ 9881da177e4SLinus Torvalds .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ 9891da177e4SLinus Torvalds .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ 9901da177e4SLinus Torvalds .p_bufsiz = MAX(NFS3_##argtype##_sz,NFS3_##restype##_sz) << 2, \ 9911da177e4SLinus Torvalds .p_timer = timer \ 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds struct rpc_procinfo nfs3_procedures[] = { 9951da177e4SLinus Torvalds PROC(GETATTR, fhandle, attrstat, 1), 9961da177e4SLinus Torvalds PROC(SETATTR, sattrargs, wccstat, 0), 9971da177e4SLinus Torvalds PROC(LOOKUP, diropargs, lookupres, 2), 9981da177e4SLinus Torvalds PROC(ACCESS, accessargs, accessres, 1), 9991da177e4SLinus Torvalds PROC(READLINK, readlinkargs, readlinkres, 3), 10001da177e4SLinus Torvalds PROC(READ, readargs, readres, 3), 10011da177e4SLinus Torvalds PROC(WRITE, writeargs, writeres, 4), 10021da177e4SLinus Torvalds PROC(CREATE, createargs, createres, 0), 10031da177e4SLinus Torvalds PROC(MKDIR, mkdirargs, createres, 0), 10041da177e4SLinus Torvalds PROC(SYMLINK, symlinkargs, createres, 0), 10051da177e4SLinus Torvalds PROC(MKNOD, mknodargs, createres, 0), 10061da177e4SLinus Torvalds PROC(REMOVE, diropargs, wccstat, 0), 10071da177e4SLinus Torvalds PROC(RMDIR, diropargs, wccstat, 0), 10081da177e4SLinus Torvalds PROC(RENAME, renameargs, renameres, 0), 10091da177e4SLinus Torvalds PROC(LINK, linkargs, linkres, 0), 10101da177e4SLinus Torvalds PROC(READDIR, readdirargs, readdirres, 3), 10111da177e4SLinus Torvalds PROC(READDIRPLUS, readdirargs, readdirres, 3), 10121da177e4SLinus Torvalds PROC(FSSTAT, fhandle, fsstatres, 0), 10131da177e4SLinus Torvalds PROC(FSINFO, fhandle, fsinfores, 0), 10141da177e4SLinus Torvalds PROC(PATHCONF, fhandle, pathconfres, 0), 10151da177e4SLinus Torvalds PROC(COMMIT, commitargs, commitres, 5), 10161da177e4SLinus Torvalds }; 10171da177e4SLinus Torvalds 10181da177e4SLinus Torvalds struct rpc_version nfs_version3 = { 10191da177e4SLinus Torvalds .number = 3, 10201da177e4SLinus Torvalds .nrprocs = sizeof(nfs3_procedures)/sizeof(nfs3_procedures[0]), 10211da177e4SLinus Torvalds .procs = nfs3_procedures 10221da177e4SLinus Torvalds }; 10231da177e4SLinus Torvalds 1024