11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfs/callback_xdr.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2004 Trond Myklebust 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * NFSv4 callback encode/decode procedures 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds #include <linux/kernel.h> 91da177e4SLinus Torvalds #include <linux/sunrpc/svc.h> 101da177e4SLinus Torvalds #include <linux/nfs4.h> 111da177e4SLinus Torvalds #include <linux/nfs_fs.h> 129a3ba432STrond Myklebust #include <linux/ratelimit.h> 139a3ba432STrond Myklebust #include <linux/printk.h> 145a0e3ad6STejun Heo #include <linux/slab.h> 15c36fca52SAndy Adamson #include <linux/sunrpc/bc_xprt.h> 164ce79717STrond Myklebust #include "nfs4_fs.h" 171da177e4SLinus Torvalds #include "callback.h" 18c36fca52SAndy Adamson #include "internal.h" 1976e697baSTrond Myklebust #include "nfs4session.h" 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #define CB_OP_TAGLEN_MAXSZ (512) 2245724e8aSKinglong Mee #define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status 2345724e8aSKinglong Mee #define CB_OP_GETATTR_BITMAP_MAXSZ (4 * 4) // bitmap length, 3 bitmaps 241da177e4SLinus Torvalds #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 251da177e4SLinus Torvalds CB_OP_GETATTR_BITMAP_MAXSZ + \ 2645724e8aSKinglong Mee /* change, size, ctime, mtime */\ 2745724e8aSKinglong Mee (2 + 2 + 3 + 3) * 4) 281da177e4SLinus Torvalds #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 291da177e4SLinus Torvalds 304aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 31f2a62561SFred Isaman #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 321be5683bSMarc Eshel #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 334aece6a1SBenny Halevy #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 3445724e8aSKinglong Mee NFS4_MAX_SESSIONID_LEN + \ 3545724e8aSKinglong Mee (1 + 3) * 4) // seqid, 3 slotids 3631f09607SAlexandros Batsakis #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 37b9efa1b2SAndy Adamson #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 384aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 394aece6a1SBenny Halevy 401da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_CALLBACK 411da177e4SLinus Torvalds 4231d2b435SAndy Adamson /* Internal error code */ 4331d2b435SAndy Adamson #define NFS4ERR_RESOURCE_HDR 11050 4431d2b435SAndy Adamson 45c36fca52SAndy Adamson typedef __be32 (*callback_process_op_t)(void *, void *, 46c36fca52SAndy Adamson struct cb_process_state *); 47e6f684f6SAl Viro typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); 48e6f684f6SAl Viro typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds struct callback_op { 521da177e4SLinus Torvalds callback_process_op_t process_op; 531da177e4SLinus Torvalds callback_decode_arg_t decode_args; 541da177e4SLinus Torvalds callback_encode_res_t encode_res; 551da177e4SLinus Torvalds long res_maxsize; 561da177e4SLinus Torvalds }; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds static struct callback_op callback_ops[]; 591da177e4SLinus Torvalds 607111c66eSAl Viro static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds return htonl(NFS4_OK); 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds 655704fdebSAl Viro static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds return xdr_argsize_check(rqstp, p); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds 705704fdebSAl Viro static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 711da177e4SLinus Torvalds { 721da177e4SLinus Torvalds return xdr_ressize_check(rqstp, p); 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds 75b60475c9SJeff Layton static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes) 761da177e4SLinus Torvalds { 775704fdebSAl Viro __be32 *p; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds p = xdr_inline_decode(xdr, nbytes); 801da177e4SLinus Torvalds if (unlikely(p == NULL)) 81756b9b37STrond Myklebust printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); 821da177e4SLinus Torvalds return p; 831da177e4SLinus Torvalds } 841da177e4SLinus Torvalds 85e6f684f6SAl Viro static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) 861da177e4SLinus Torvalds { 875704fdebSAl Viro __be32 *p; 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds p = read_buf(xdr, 4); 901da177e4SLinus Torvalds if (unlikely(p == NULL)) 911da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 921da177e4SLinus Torvalds *len = ntohl(*p); 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds if (*len != 0) { 951da177e4SLinus Torvalds p = read_buf(xdr, *len); 961da177e4SLinus Torvalds if (unlikely(p == NULL)) 971da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 981da177e4SLinus Torvalds *str = (const char *)p; 991da177e4SLinus Torvalds } else 1001da177e4SLinus Torvalds *str = NULL; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds return 0; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 105e6f684f6SAl Viro static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) 1061da177e4SLinus Torvalds { 1075704fdebSAl Viro __be32 *p; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds p = read_buf(xdr, 4); 1101da177e4SLinus Torvalds if (unlikely(p == NULL)) 1111da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1121da177e4SLinus Torvalds fh->size = ntohl(*p); 1131da177e4SLinus Torvalds if (fh->size > NFS4_FHSIZE) 1141da177e4SLinus Torvalds return htonl(NFS4ERR_BADHANDLE); 1151da177e4SLinus Torvalds p = read_buf(xdr, fh->size); 1161da177e4SLinus Torvalds if (unlikely(p == NULL)) 1171da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1181da177e4SLinus Torvalds memcpy(&fh->data[0], p, fh->size); 1191da177e4SLinus Torvalds memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); 1201da177e4SLinus Torvalds return 0; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 123e6f684f6SAl Viro static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) 1241da177e4SLinus Torvalds { 1255704fdebSAl Viro __be32 *p; 1261da177e4SLinus Torvalds unsigned int attrlen; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds p = read_buf(xdr, 4); 1291da177e4SLinus Torvalds if (unlikely(p == NULL)) 1301da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1311da177e4SLinus Torvalds attrlen = ntohl(*p); 1321da177e4SLinus Torvalds p = read_buf(xdr, attrlen << 2); 1331da177e4SLinus Torvalds if (unlikely(p == NULL)) 1341da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1351da177e4SLinus Torvalds if (likely(attrlen > 0)) 1361da177e4SLinus Torvalds bitmap[0] = ntohl(*p++); 1371da177e4SLinus Torvalds if (attrlen > 1) 1381da177e4SLinus Torvalds bitmap[1] = ntohl(*p); 1391da177e4SLinus Torvalds return 0; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 142e6f684f6SAl Viro static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 1431da177e4SLinus Torvalds { 1445704fdebSAl Viro __be32 *p; 1451da177e4SLinus Torvalds 1462d2f24adSTrond Myklebust p = read_buf(xdr, NFS4_STATEID_SIZE); 1471da177e4SLinus Torvalds if (unlikely(p == NULL)) 1481da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 14993b717fdSTrond Myklebust memcpy(stateid->data, p, NFS4_STATEID_SIZE); 1501da177e4SLinus Torvalds return 0; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 15393b717fdSTrond Myklebust static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 15493b717fdSTrond Myklebust { 15593b717fdSTrond Myklebust stateid->type = NFS4_DELEGATION_STATEID_TYPE; 15693b717fdSTrond Myklebust return decode_stateid(xdr, stateid); 15793b717fdSTrond Myklebust } 15893b717fdSTrond Myklebust 159e6f684f6SAl Viro static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) 1601da177e4SLinus Torvalds { 1615704fdebSAl Viro __be32 *p; 162e6f684f6SAl Viro __be32 status; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds status = decode_string(xdr, &hdr->taglen, &hdr->tag); 1651da177e4SLinus Torvalds if (unlikely(status != 0)) 1661da177e4SLinus Torvalds return status; 1671da177e4SLinus Torvalds /* We do not like overly long tags! */ 168403889c0SKinglong Mee if (hdr->taglen > CB_OP_TAGLEN_MAXSZ) { 169a030889aSWeston Andros Adamson printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n", 1703110ff80SHarvey Harrison __func__, hdr->taglen); 1711da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds p = read_buf(xdr, 12); 1741da177e4SLinus Torvalds if (unlikely(p == NULL)) 1751da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 176b8f2ef84SBenny Halevy hdr->minorversion = ntohl(*p++); 177459de2edSBryan Schumaker /* Check for minor version support */ 178459de2edSBryan Schumaker if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { 17942c2c424SSteve Dickson hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ 18048a9e2d2SBenny Halevy } else { 1819a3ba432STrond Myklebust pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " 182b8f2ef84SBenny Halevy "illegal minor version %u!\n", 183b8f2ef84SBenny Halevy __func__, hdr->minorversion); 1841da177e4SLinus Torvalds return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds hdr->nops = ntohl(*p); 187b8f2ef84SBenny Halevy dprintk("%s: minorversion %d nops %d\n", __func__, 188b8f2ef84SBenny Halevy hdr->minorversion, hdr->nops); 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 192e6f684f6SAl Viro static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) 1931da177e4SLinus Torvalds { 1945704fdebSAl Viro __be32 *p; 1951da177e4SLinus Torvalds p = read_buf(xdr, 4); 1961da177e4SLinus Torvalds if (unlikely(p == NULL)) 19731d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 1981da177e4SLinus Torvalds *op = ntohl(*p); 1991da177e4SLinus Torvalds return 0; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 202e6f684f6SAl Viro static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) 2031da177e4SLinus Torvalds { 204e6f684f6SAl Viro __be32 status; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 2071da177e4SLinus Torvalds if (unlikely(status != 0)) 2081da177e4SLinus Torvalds goto out; 2091da177e4SLinus Torvalds status = decode_bitmap(xdr, args->bitmap); 2101da177e4SLinus Torvalds out: 2113110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2121da177e4SLinus Torvalds return status; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 215e6f684f6SAl Viro static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) 2161da177e4SLinus Torvalds { 2175704fdebSAl Viro __be32 *p; 218e6f684f6SAl Viro __be32 status; 2191da177e4SLinus Torvalds 22093b717fdSTrond Myklebust status = decode_delegation_stateid(xdr, &args->stateid); 2211da177e4SLinus Torvalds if (unlikely(status != 0)) 2221da177e4SLinus Torvalds goto out; 2231da177e4SLinus Torvalds p = read_buf(xdr, 4); 2241da177e4SLinus Torvalds if (unlikely(p == NULL)) { 2251da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 2261da177e4SLinus Torvalds goto out; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds args->truncate = ntohl(*p); 2291da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 2301da177e4SLinus Torvalds out: 2313110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2323873bc50SAlexey Dobriyan return status; 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds 2354aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 23693b717fdSTrond Myklebust static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 23793b717fdSTrond Myklebust { 23893b717fdSTrond Myklebust stateid->type = NFS4_LAYOUT_STATEID_TYPE; 23993b717fdSTrond Myklebust return decode_stateid(xdr, stateid); 24093b717fdSTrond Myklebust } 2414aece6a1SBenny Halevy 242f2a62561SFred Isaman static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, 243f2a62561SFred Isaman struct xdr_stream *xdr, 244f2a62561SFred Isaman struct cb_layoutrecallargs *args) 245f2a62561SFred Isaman { 246f2a62561SFred Isaman __be32 *p; 247f2a62561SFred Isaman __be32 status = 0; 248f2a62561SFred Isaman uint32_t iomode; 249f2a62561SFred Isaman 250f2a62561SFred Isaman p = read_buf(xdr, 4 * sizeof(uint32_t)); 251f2a62561SFred Isaman if (unlikely(p == NULL)) { 252f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 253f2a62561SFred Isaman goto out; 254f2a62561SFred Isaman } 255f2a62561SFred Isaman 256f2a62561SFred Isaman args->cbl_layout_type = ntohl(*p++); 257f2a62561SFred Isaman /* Depite the spec's xdr, iomode really belongs in the FILE switch, 25825985edcSLucas De Marchi * as it is unusable and ignored with the other types. 259f2a62561SFred Isaman */ 260f2a62561SFred Isaman iomode = ntohl(*p++); 261f2a62561SFred Isaman args->cbl_layoutchanged = ntohl(*p++); 262f2a62561SFred Isaman args->cbl_recall_type = ntohl(*p++); 263f2a62561SFred Isaman 264f2a62561SFred Isaman if (args->cbl_recall_type == RETURN_FILE) { 265f2a62561SFred Isaman args->cbl_range.iomode = iomode; 266f2a62561SFred Isaman status = decode_fh(xdr, &args->cbl_fh); 267f2a62561SFred Isaman if (unlikely(status != 0)) 268f2a62561SFred Isaman goto out; 269f2a62561SFred Isaman 270f2a62561SFred Isaman p = read_buf(xdr, 2 * sizeof(uint64_t)); 271f2a62561SFred Isaman if (unlikely(p == NULL)) { 272f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 273f2a62561SFred Isaman goto out; 274f2a62561SFred Isaman } 275f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_range.offset); 276f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_range.length); 27793b717fdSTrond Myklebust status = decode_layout_stateid(xdr, &args->cbl_stateid); 278f2a62561SFred Isaman if (unlikely(status != 0)) 279f2a62561SFred Isaman goto out; 280f2a62561SFred Isaman } else if (args->cbl_recall_type == RETURN_FSID) { 281f2a62561SFred Isaman p = read_buf(xdr, 2 * sizeof(uint64_t)); 282f2a62561SFred Isaman if (unlikely(p == NULL)) { 283f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 284f2a62561SFred Isaman goto out; 285f2a62561SFred Isaman } 286f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_fsid.major); 287f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_fsid.minor); 288f2a62561SFred Isaman } else if (args->cbl_recall_type != RETURN_ALL) { 289f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 290f2a62561SFred Isaman goto out; 291f2a62561SFred Isaman } 292f2a62561SFred Isaman dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", 293f2a62561SFred Isaman __func__, 294f2a62561SFred Isaman args->cbl_layout_type, iomode, 295f2a62561SFred Isaman args->cbl_layoutchanged, args->cbl_recall_type); 296f2a62561SFred Isaman out: 297f2a62561SFred Isaman dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 298f2a62561SFred Isaman return status; 299f2a62561SFred Isaman } 300f2a62561SFred Isaman 3011be5683bSMarc Eshel static 3021be5683bSMarc Eshel __be32 decode_devicenotify_args(struct svc_rqst *rqstp, 3031be5683bSMarc Eshel struct xdr_stream *xdr, 3041be5683bSMarc Eshel struct cb_devicenotifyargs *args) 3051be5683bSMarc Eshel { 3061be5683bSMarc Eshel __be32 *p; 3071be5683bSMarc Eshel __be32 status = 0; 3081be5683bSMarc Eshel u32 tmp; 3091be5683bSMarc Eshel int n, i; 3101be5683bSMarc Eshel args->ndevs = 0; 3111be5683bSMarc Eshel 3121be5683bSMarc Eshel /* Num of device notifications */ 3131be5683bSMarc Eshel p = read_buf(xdr, sizeof(uint32_t)); 3141be5683bSMarc Eshel if (unlikely(p == NULL)) { 3151be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3161be5683bSMarc Eshel goto out; 3171be5683bSMarc Eshel } 3181be5683bSMarc Eshel n = ntohl(*p++); 3191be5683bSMarc Eshel if (n <= 0) 3201be5683bSMarc Eshel goto out; 321363e0df0SDan Carpenter if (n > ULONG_MAX / sizeof(*args->devs)) { 322363e0df0SDan Carpenter status = htonl(NFS4ERR_BADXDR); 323363e0df0SDan Carpenter goto out; 324363e0df0SDan Carpenter } 3251be5683bSMarc Eshel 326a4f743a6STrond Myklebust args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); 3271be5683bSMarc Eshel if (!args->devs) { 3281be5683bSMarc Eshel status = htonl(NFS4ERR_DELAY); 3291be5683bSMarc Eshel goto out; 3301be5683bSMarc Eshel } 3311be5683bSMarc Eshel 3321be5683bSMarc Eshel /* Decode each dev notification */ 3331be5683bSMarc Eshel for (i = 0; i < n; i++) { 3341be5683bSMarc Eshel struct cb_devicenotifyitem *dev = &args->devs[i]; 3351be5683bSMarc Eshel 3361be5683bSMarc Eshel p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); 3371be5683bSMarc Eshel if (unlikely(p == NULL)) { 3381be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3391be5683bSMarc Eshel goto err; 3401be5683bSMarc Eshel } 3411be5683bSMarc Eshel 3421be5683bSMarc Eshel tmp = ntohl(*p++); /* bitmap size */ 3431be5683bSMarc Eshel if (tmp != 1) { 3441be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3451be5683bSMarc Eshel goto err; 3461be5683bSMarc Eshel } 3471be5683bSMarc Eshel dev->cbd_notify_type = ntohl(*p++); 3481be5683bSMarc Eshel if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && 3491be5683bSMarc Eshel dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { 3501be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3511be5683bSMarc Eshel goto err; 3521be5683bSMarc Eshel } 3531be5683bSMarc Eshel 3541be5683bSMarc Eshel tmp = ntohl(*p++); /* opaque size */ 3551be5683bSMarc Eshel if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && 3561be5683bSMarc Eshel (tmp != NFS4_DEVICEID4_SIZE + 8)) || 3571be5683bSMarc Eshel ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && 3581be5683bSMarc Eshel (tmp != NFS4_DEVICEID4_SIZE + 4))) { 3591be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3601be5683bSMarc Eshel goto err; 3611be5683bSMarc Eshel } 3621be5683bSMarc Eshel dev->cbd_layout_type = ntohl(*p++); 3631be5683bSMarc Eshel memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); 3641be5683bSMarc Eshel p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); 3651be5683bSMarc Eshel 3661be5683bSMarc Eshel if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { 3671be5683bSMarc Eshel p = read_buf(xdr, sizeof(uint32_t)); 3681be5683bSMarc Eshel if (unlikely(p == NULL)) { 3691be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3701be5683bSMarc Eshel goto err; 3711be5683bSMarc Eshel } 3721be5683bSMarc Eshel dev->cbd_immediate = ntohl(*p++); 3731be5683bSMarc Eshel } else { 3741be5683bSMarc Eshel dev->cbd_immediate = 0; 3751be5683bSMarc Eshel } 3761be5683bSMarc Eshel 3771be5683bSMarc Eshel args->ndevs++; 3781be5683bSMarc Eshel 3791be5683bSMarc Eshel dprintk("%s: type %d layout 0x%x immediate %d\n", 3801be5683bSMarc Eshel __func__, dev->cbd_notify_type, dev->cbd_layout_type, 3811be5683bSMarc Eshel dev->cbd_immediate); 3821be5683bSMarc Eshel } 3831be5683bSMarc Eshel out: 3841be5683bSMarc Eshel dprintk("%s: status %d ndevs %d\n", 3851be5683bSMarc Eshel __func__, ntohl(status), args->ndevs); 3861be5683bSMarc Eshel return status; 3871be5683bSMarc Eshel err: 3881be5683bSMarc Eshel kfree(args->devs); 3891be5683bSMarc Eshel goto out; 3901be5683bSMarc Eshel } 3911be5683bSMarc Eshel 3929733f0d9SAndy Adamson static __be32 decode_sessionid(struct xdr_stream *xdr, 3934aece6a1SBenny Halevy struct nfs4_sessionid *sid) 3944aece6a1SBenny Halevy { 3959733f0d9SAndy Adamson __be32 *p; 3964aece6a1SBenny Halevy 397590184a6SKinglong Mee p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); 3984aece6a1SBenny Halevy if (unlikely(p == NULL)) 399a419aef8SJoe Perches return htonl(NFS4ERR_RESOURCE); 4004aece6a1SBenny Halevy 401590184a6SKinglong Mee memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); 4024aece6a1SBenny Halevy return 0; 4034aece6a1SBenny Halevy } 4044aece6a1SBenny Halevy 4059733f0d9SAndy Adamson static __be32 decode_rc_list(struct xdr_stream *xdr, 4064aece6a1SBenny Halevy struct referring_call_list *rc_list) 4074aece6a1SBenny Halevy { 4089733f0d9SAndy Adamson __be32 *p; 4094aece6a1SBenny Halevy int i; 4109733f0d9SAndy Adamson __be32 status; 4114aece6a1SBenny Halevy 4124aece6a1SBenny Halevy status = decode_sessionid(xdr, &rc_list->rcl_sessionid); 4134aece6a1SBenny Halevy if (status) 4144aece6a1SBenny Halevy goto out; 4154aece6a1SBenny Halevy 4164aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4174aece6a1SBenny Halevy p = read_buf(xdr, sizeof(uint32_t)); 4184aece6a1SBenny Halevy if (unlikely(p == NULL)) 4194aece6a1SBenny Halevy goto out; 4204aece6a1SBenny Halevy 4214aece6a1SBenny Halevy rc_list->rcl_nrefcalls = ntohl(*p++); 4224aece6a1SBenny Halevy if (rc_list->rcl_nrefcalls) { 4234aece6a1SBenny Halevy p = read_buf(xdr, 4244aece6a1SBenny Halevy rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); 4254aece6a1SBenny Halevy if (unlikely(p == NULL)) 4264aece6a1SBenny Halevy goto out; 427a4f743a6STrond Myklebust rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, 4284aece6a1SBenny Halevy sizeof(*rc_list->rcl_refcalls), 4294aece6a1SBenny Halevy GFP_KERNEL); 4304aece6a1SBenny Halevy if (unlikely(rc_list->rcl_refcalls == NULL)) 4314aece6a1SBenny Halevy goto out; 4324aece6a1SBenny Halevy for (i = 0; i < rc_list->rcl_nrefcalls; i++) { 4334aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); 4344aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); 4354aece6a1SBenny Halevy } 4364aece6a1SBenny Halevy } 4374aece6a1SBenny Halevy status = 0; 4384aece6a1SBenny Halevy 4394aece6a1SBenny Halevy out: 4404aece6a1SBenny Halevy return status; 4414aece6a1SBenny Halevy } 4424aece6a1SBenny Halevy 4439733f0d9SAndy Adamson static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, 4444aece6a1SBenny Halevy struct xdr_stream *xdr, 4454aece6a1SBenny Halevy struct cb_sequenceargs *args) 4464aece6a1SBenny Halevy { 4479733f0d9SAndy Adamson __be32 *p; 4484aece6a1SBenny Halevy int i; 4499733f0d9SAndy Adamson __be32 status; 4504aece6a1SBenny Halevy 4514aece6a1SBenny Halevy status = decode_sessionid(xdr, &args->csa_sessionid); 4524aece6a1SBenny Halevy if (status) 4534aece6a1SBenny Halevy goto out; 4544aece6a1SBenny Halevy 4554aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4564aece6a1SBenny Halevy p = read_buf(xdr, 5 * sizeof(uint32_t)); 4574aece6a1SBenny Halevy if (unlikely(p == NULL)) 4584aece6a1SBenny Halevy goto out; 4594aece6a1SBenny Halevy 46065fc64e5SRicardo Labiaga args->csa_addr = svc_addr(rqstp); 4614aece6a1SBenny Halevy args->csa_sequenceid = ntohl(*p++); 4624aece6a1SBenny Halevy args->csa_slotid = ntohl(*p++); 4634aece6a1SBenny Halevy args->csa_highestslotid = ntohl(*p++); 4644aece6a1SBenny Halevy args->csa_cachethis = ntohl(*p++); 4654aece6a1SBenny Halevy args->csa_nrclists = ntohl(*p++); 4664aece6a1SBenny Halevy args->csa_rclists = NULL; 4674aece6a1SBenny Halevy if (args->csa_nrclists) { 4680439f31cSDan Carpenter args->csa_rclists = kmalloc_array(args->csa_nrclists, 4694aece6a1SBenny Halevy sizeof(*args->csa_rclists), 4704aece6a1SBenny Halevy GFP_KERNEL); 4714aece6a1SBenny Halevy if (unlikely(args->csa_rclists == NULL)) 4724aece6a1SBenny Halevy goto out; 4734aece6a1SBenny Halevy 4744aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) { 4754aece6a1SBenny Halevy status = decode_rc_list(xdr, &args->csa_rclists[i]); 476d8ba1f97STrond Myklebust if (status) { 477d8ba1f97STrond Myklebust args->csa_nrclists = i; 4784aece6a1SBenny Halevy goto out_free; 4794aece6a1SBenny Halevy } 4804aece6a1SBenny Halevy } 481d8ba1f97STrond Myklebust } 4824aece6a1SBenny Halevy status = 0; 4834aece6a1SBenny Halevy 4844aece6a1SBenny Halevy dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " 4854aece6a1SBenny Halevy "highestslotid %u cachethis %d nrclists %u\n", 4864aece6a1SBenny Halevy __func__, 4874aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[0], 4884aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[1], 4894aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[2], 4904aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[3], 4914aece6a1SBenny Halevy args->csa_sequenceid, args->csa_slotid, 4924aece6a1SBenny Halevy args->csa_highestslotid, args->csa_cachethis, 4934aece6a1SBenny Halevy args->csa_nrclists); 4944aece6a1SBenny Halevy out: 4954aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 4964aece6a1SBenny Halevy return status; 4974aece6a1SBenny Halevy 4984aece6a1SBenny Halevy out_free: 4994aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) 5004aece6a1SBenny Halevy kfree(args->csa_rclists[i].rcl_refcalls); 5014aece6a1SBenny Halevy kfree(args->csa_rclists); 5024aece6a1SBenny Halevy goto out; 5034aece6a1SBenny Halevy } 5044aece6a1SBenny Halevy 5059733f0d9SAndy Adamson static __be32 decode_recallany_args(struct svc_rqst *rqstp, 50631f09607SAlexandros Batsakis struct xdr_stream *xdr, 50731f09607SAlexandros Batsakis struct cb_recallanyargs *args) 50831f09607SAlexandros Batsakis { 509d743c3c9SPeng Tao uint32_t bitmap[2]; 510d743c3c9SPeng Tao __be32 *p, status; 51131f09607SAlexandros Batsakis 51231f09607SAlexandros Batsakis p = read_buf(xdr, 4); 51331f09607SAlexandros Batsakis if (unlikely(p == NULL)) 51431f09607SAlexandros Batsakis return htonl(NFS4ERR_BADXDR); 51531f09607SAlexandros Batsakis args->craa_objs_to_keep = ntohl(*p++); 516d743c3c9SPeng Tao status = decode_bitmap(xdr, bitmap); 517d743c3c9SPeng Tao if (unlikely(status)) 518d743c3c9SPeng Tao return status; 519d743c3c9SPeng Tao args->craa_type_mask = bitmap[0]; 52031f09607SAlexandros Batsakis 52131f09607SAlexandros Batsakis return 0; 52231f09607SAlexandros Batsakis } 52331f09607SAlexandros Batsakis 5249733f0d9SAndy Adamson static __be32 decode_recallslot_args(struct svc_rqst *rqstp, 525b9efa1b2SAndy Adamson struct xdr_stream *xdr, 526b9efa1b2SAndy Adamson struct cb_recallslotargs *args) 527b9efa1b2SAndy Adamson { 528b9efa1b2SAndy Adamson __be32 *p; 529b9efa1b2SAndy Adamson 530b9efa1b2SAndy Adamson p = read_buf(xdr, 4); 531b9efa1b2SAndy Adamson if (unlikely(p == NULL)) 532b9efa1b2SAndy Adamson return htonl(NFS4ERR_BADXDR); 533d5fb4ce3STrond Myklebust args->crsa_target_highest_slotid = ntohl(*p++); 534b9efa1b2SAndy Adamson return 0; 535b9efa1b2SAndy Adamson } 536b9efa1b2SAndy Adamson 5374aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 5384aece6a1SBenny Halevy 539e6f684f6SAl Viro static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) 5401da177e4SLinus Torvalds { 5415704fdebSAl Viro __be32 *p; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 4 + len); 5441da177e4SLinus Torvalds if (unlikely(p == NULL)) 5451da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5461da177e4SLinus Torvalds xdr_encode_opaque(p, str, len); 5471da177e4SLinus Torvalds return 0; 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) 5511da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) 5525704fdebSAl Viro static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) 5531da177e4SLinus Torvalds { 5545704fdebSAl Viro __be32 bm[2]; 5555704fdebSAl Viro __be32 *p; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); 5581da177e4SLinus Torvalds bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); 5591da177e4SLinus Torvalds if (bm[1] != 0) { 5601da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 16); 5611da177e4SLinus Torvalds if (unlikely(p == NULL)) 5621da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5631da177e4SLinus Torvalds *p++ = htonl(2); 5641da177e4SLinus Torvalds *p++ = bm[0]; 5651da177e4SLinus Torvalds *p++ = bm[1]; 5661da177e4SLinus Torvalds } else if (bm[0] != 0) { 5671da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 5681da177e4SLinus Torvalds if (unlikely(p == NULL)) 5691da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5701da177e4SLinus Torvalds *p++ = htonl(1); 5711da177e4SLinus Torvalds *p++ = bm[0]; 5721da177e4SLinus Torvalds } else { 5731da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 5741da177e4SLinus Torvalds if (unlikely(p == NULL)) 5751da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5761da177e4SLinus Torvalds *p++ = htonl(0); 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds *savep = p; 5791da177e4SLinus Torvalds return 0; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 582e6f684f6SAl Viro static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) 5831da177e4SLinus Torvalds { 5845704fdebSAl Viro __be32 *p; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) 5871da177e4SLinus Torvalds return 0; 5881da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 58990dc7d27SHarvey Harrison if (unlikely(!p)) 5901da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5911da177e4SLinus Torvalds p = xdr_encode_hyper(p, change); 5921da177e4SLinus Torvalds return 0; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 595e6f684f6SAl Viro static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) 5961da177e4SLinus Torvalds { 5975704fdebSAl Viro __be32 *p; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_SIZE)) 6001da177e4SLinus Torvalds return 0; 6011da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 60290dc7d27SHarvey Harrison if (unlikely(!p)) 6031da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6041da177e4SLinus Torvalds p = xdr_encode_hyper(p, size); 6051da177e4SLinus Torvalds return 0; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 608e6f684f6SAl Viro static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) 6091da177e4SLinus Torvalds { 6105704fdebSAl Viro __be32 *p; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 61390dc7d27SHarvey Harrison if (unlikely(!p)) 6141da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6151da177e4SLinus Torvalds p = xdr_encode_hyper(p, time->tv_sec); 6161da177e4SLinus Torvalds *p = htonl(time->tv_nsec); 6171da177e4SLinus Torvalds return 0; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 620e6f684f6SAl Viro static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6211da177e4SLinus Torvalds { 6221da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) 6231da177e4SLinus Torvalds return 0; 6241da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 627e6f684f6SAl Viro static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6281da177e4SLinus Torvalds { 6291da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) 6301da177e4SLinus Torvalds return 0; 6311da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 634e6f684f6SAl Viro static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) 6351da177e4SLinus Torvalds { 636e6f684f6SAl Viro __be32 status; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds hdr->status = xdr_reserve_space(xdr, 4); 6391da177e4SLinus Torvalds if (unlikely(hdr->status == NULL)) 6401da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6411da177e4SLinus Torvalds status = encode_string(xdr, hdr->taglen, hdr->tag); 6421da177e4SLinus Torvalds if (unlikely(status != 0)) 6431da177e4SLinus Torvalds return status; 6441da177e4SLinus Torvalds hdr->nops = xdr_reserve_space(xdr, 4); 6451da177e4SLinus Torvalds if (unlikely(hdr->nops == NULL)) 6461da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6471da177e4SLinus Torvalds return 0; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 650e6f684f6SAl Viro static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) 6511da177e4SLinus Torvalds { 6525704fdebSAl Viro __be32 *p; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 6551da177e4SLinus Torvalds if (unlikely(p == NULL)) 65631d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 6571da177e4SLinus Torvalds *p++ = htonl(op); 6581da177e4SLinus Torvalds *p = res; 6591da177e4SLinus Torvalds return 0; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 662e6f684f6SAl Viro static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) 6631da177e4SLinus Torvalds { 6645704fdebSAl Viro __be32 *savep = NULL; 665e6f684f6SAl Viro __be32 status = res->status; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds if (unlikely(status != 0)) 6681da177e4SLinus Torvalds goto out; 6691da177e4SLinus Torvalds status = encode_attr_bitmap(xdr, res->bitmap, &savep); 6701da177e4SLinus Torvalds if (unlikely(status != 0)) 6711da177e4SLinus Torvalds goto out; 6721da177e4SLinus Torvalds status = encode_attr_change(xdr, res->bitmap, res->change_attr); 6731da177e4SLinus Torvalds if (unlikely(status != 0)) 6741da177e4SLinus Torvalds goto out; 6751da177e4SLinus Torvalds status = encode_attr_size(xdr, res->bitmap, res->size); 6761da177e4SLinus Torvalds if (unlikely(status != 0)) 6771da177e4SLinus Torvalds goto out; 6781da177e4SLinus Torvalds status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); 6791da177e4SLinus Torvalds if (unlikely(status != 0)) 6801da177e4SLinus Torvalds goto out; 6811da177e4SLinus Torvalds status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); 6821da177e4SLinus Torvalds *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); 6831da177e4SLinus Torvalds out: 6843110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 6851da177e4SLinus Torvalds return status; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 68834bc47c9SBenny Halevy #if defined(CONFIG_NFS_V4_1) 68934bc47c9SBenny Halevy 6909733f0d9SAndy Adamson static __be32 encode_sessionid(struct xdr_stream *xdr, 6914aece6a1SBenny Halevy const struct nfs4_sessionid *sid) 6924aece6a1SBenny Halevy { 6939733f0d9SAndy Adamson __be32 *p; 6944aece6a1SBenny Halevy 695590184a6SKinglong Mee p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); 6964aece6a1SBenny Halevy if (unlikely(p == NULL)) 6974aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 6984aece6a1SBenny Halevy 699590184a6SKinglong Mee memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); 7004aece6a1SBenny Halevy return 0; 7014aece6a1SBenny Halevy } 7024aece6a1SBenny Halevy 7039733f0d9SAndy Adamson static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, 7044aece6a1SBenny Halevy struct xdr_stream *xdr, 7054aece6a1SBenny Halevy const struct cb_sequenceres *res) 7064aece6a1SBenny Halevy { 7079733f0d9SAndy Adamson __be32 *p; 708e216c8c7SDan Carpenter __be32 status = res->csr_status; 7094aece6a1SBenny Halevy 7104aece6a1SBenny Halevy if (unlikely(status != 0)) 7114aece6a1SBenny Halevy goto out; 7124aece6a1SBenny Halevy 713e0a63c0bSKinglong Mee status = encode_sessionid(xdr, &res->csr_sessionid); 714e0a63c0bSKinglong Mee if (status) 715e0a63c0bSKinglong Mee goto out; 7164aece6a1SBenny Halevy 7174aece6a1SBenny Halevy p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); 7184aece6a1SBenny Halevy if (unlikely(p == NULL)) 7194aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 7204aece6a1SBenny Halevy 7214aece6a1SBenny Halevy *p++ = htonl(res->csr_sequenceid); 7224aece6a1SBenny Halevy *p++ = htonl(res->csr_slotid); 7234aece6a1SBenny Halevy *p++ = htonl(res->csr_highestslotid); 7244aece6a1SBenny Halevy *p++ = htonl(res->csr_target_highestslotid); 7254aece6a1SBenny Halevy out: 7264aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 7274aece6a1SBenny Halevy return status; 7284aece6a1SBenny Halevy } 7294aece6a1SBenny Halevy 73034bc47c9SBenny Halevy static __be32 73134bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 73234bc47c9SBenny Halevy { 733281fe15dSBenny Halevy if (op_nr == OP_CB_SEQUENCE) { 734281fe15dSBenny Halevy if (nop != 0) 735281fe15dSBenny Halevy return htonl(NFS4ERR_SEQUENCE_POS); 736281fe15dSBenny Halevy } else { 737281fe15dSBenny Halevy if (nop == 0) 738281fe15dSBenny Halevy return htonl(NFS4ERR_OP_NOT_IN_SESSION); 739281fe15dSBenny Halevy } 740281fe15dSBenny Halevy 74134bc47c9SBenny Halevy switch (op_nr) { 74234bc47c9SBenny Halevy case OP_CB_GETATTR: 74334bc47c9SBenny Halevy case OP_CB_RECALL: 7444aece6a1SBenny Halevy case OP_CB_SEQUENCE: 74531f09607SAlexandros Batsakis case OP_CB_RECALL_ANY: 746b9efa1b2SAndy Adamson case OP_CB_RECALL_SLOT: 747f2a62561SFred Isaman case OP_CB_LAYOUTRECALL: 7481be5683bSMarc Eshel case OP_CB_NOTIFY_DEVICEID: 74934bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 75034bc47c9SBenny Halevy break; 75134bc47c9SBenny Halevy 75234bc47c9SBenny Halevy case OP_CB_NOTIFY: 75334bc47c9SBenny Halevy case OP_CB_PUSH_DELEG: 75434bc47c9SBenny Halevy case OP_CB_RECALLABLE_OBJ_AVAIL: 75534bc47c9SBenny Halevy case OP_CB_WANTS_CANCELLED: 75634bc47c9SBenny Halevy case OP_CB_NOTIFY_LOCK: 75734bc47c9SBenny Halevy return htonl(NFS4ERR_NOTSUPP); 75834bc47c9SBenny Halevy 75934bc47c9SBenny Halevy default: 76034bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 76134bc47c9SBenny Halevy } 76234bc47c9SBenny Halevy 76334bc47c9SBenny Halevy return htonl(NFS_OK); 76434bc47c9SBenny Halevy } 76534bc47c9SBenny Halevy 766810d82e6STrond Myklebust static void nfs4_callback_free_slot(struct nfs4_session *session, 767810d82e6STrond Myklebust struct nfs4_slot *slot) 76842acd021SAndy Adamson { 76942acd021SAndy Adamson struct nfs4_slot_table *tbl = &session->bc_slot_table; 77042acd021SAndy Adamson 77142acd021SAndy Adamson spin_lock(&tbl->slot_tbl_lock); 77242acd021SAndy Adamson /* 77342acd021SAndy Adamson * Let the state manager know callback processing done. 77442acd021SAndy Adamson * A single slot, so highest used slotid is either 0 or -1 77542acd021SAndy Adamson */ 776810d82e6STrond Myklebust nfs4_free_slot(tbl, slot); 777774d5f14SAndy Adamson nfs4_slot_tbl_drain_complete(tbl); 77842acd021SAndy Adamson spin_unlock(&tbl->slot_tbl_lock); 77942acd021SAndy Adamson } 78042acd021SAndy Adamson 78155a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 78242acd021SAndy Adamson { 783810d82e6STrond Myklebust if (cps->slot) { 784810d82e6STrond Myklebust nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); 785810d82e6STrond Myklebust cps->slot = NULL; 786810d82e6STrond Myklebust } 78742acd021SAndy Adamson } 78842acd021SAndy Adamson 78934bc47c9SBenny Halevy #else /* CONFIG_NFS_V4_1 */ 79034bc47c9SBenny Halevy 79134bc47c9SBenny Halevy static __be32 79234bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 79334bc47c9SBenny Halevy { 79434bc47c9SBenny Halevy return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 79534bc47c9SBenny Halevy } 79634bc47c9SBenny Halevy 79755a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 79842acd021SAndy Adamson { 79942acd021SAndy Adamson } 80034bc47c9SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 80134bc47c9SBenny Halevy 8026b140b85SBryan Schumaker #ifdef CONFIG_NFS_V4_2 8036b140b85SBryan Schumaker static __be32 8046b140b85SBryan Schumaker preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) 8056b140b85SBryan Schumaker { 8066b140b85SBryan Schumaker __be32 status = preprocess_nfs41_op(nop, op_nr, op); 8076b140b85SBryan Schumaker if (status != htonl(NFS4ERR_OP_ILLEGAL)) 8086b140b85SBryan Schumaker return status; 8096b140b85SBryan Schumaker 8106b140b85SBryan Schumaker if (op_nr == OP_CB_OFFLOAD) 8116b140b85SBryan Schumaker return htonl(NFS4ERR_NOTSUPP); 8126b140b85SBryan Schumaker return htonl(NFS4ERR_OP_ILLEGAL); 8136b140b85SBryan Schumaker } 8146b140b85SBryan Schumaker #else /* CONFIG_NFS_V4_2 */ 8156b140b85SBryan Schumaker static __be32 8166b140b85SBryan Schumaker preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) 8176b140b85SBryan Schumaker { 8186b140b85SBryan Schumaker return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 8196b140b85SBryan Schumaker } 8206b140b85SBryan Schumaker #endif /* CONFIG_NFS_V4_2 */ 8216b140b85SBryan Schumaker 82234bc47c9SBenny Halevy static __be32 82334bc47c9SBenny Halevy preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) 82434bc47c9SBenny Halevy { 82534bc47c9SBenny Halevy switch (op_nr) { 82634bc47c9SBenny Halevy case OP_CB_GETATTR: 82734bc47c9SBenny Halevy case OP_CB_RECALL: 82834bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 82934bc47c9SBenny Halevy break; 83034bc47c9SBenny Halevy default: 83134bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 83234bc47c9SBenny Halevy } 83334bc47c9SBenny Halevy 83434bc47c9SBenny Halevy return htonl(NFS_OK); 83534bc47c9SBenny Halevy } 83634bc47c9SBenny Halevy 837459de2edSBryan Schumaker static __be32 process_op(int nop, struct svc_rqst *rqstp, 8381da177e4SLinus Torvalds struct xdr_stream *xdr_in, void *argp, 839c36fca52SAndy Adamson struct xdr_stream *xdr_out, void *resp, 840c36fca52SAndy Adamson struct cb_process_state *cps) 8411da177e4SLinus Torvalds { 842a162a6b8STrond Myklebust struct callback_op *op = &callback_ops[0]; 84331d2b435SAndy Adamson unsigned int op_nr; 84434bc47c9SBenny Halevy __be32 status; 8451da177e4SLinus Torvalds long maxlen; 846e6f684f6SAl Viro __be32 res; 8471da177e4SLinus Torvalds 8483110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 8491da177e4SLinus Torvalds status = decode_op_hdr(xdr_in, &op_nr); 85031d2b435SAndy Adamson if (unlikely(status)) 85131d2b435SAndy Adamson return status; 8521da177e4SLinus Torvalds 85334bc47c9SBenny Halevy dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", 854459de2edSBryan Schumaker __func__, cps->minorversion, nop, op_nr); 85534bc47c9SBenny Halevy 8566b140b85SBryan Schumaker switch (cps->minorversion) { 8576b140b85SBryan Schumaker case 0: 8586b140b85SBryan Schumaker status = preprocess_nfs4_op(op_nr, &op); 8596b140b85SBryan Schumaker break; 8606b140b85SBryan Schumaker case 1: 8616b140b85SBryan Schumaker status = preprocess_nfs41_op(nop, op_nr, &op); 8626b140b85SBryan Schumaker break; 8636b140b85SBryan Schumaker case 2: 8646b140b85SBryan Schumaker status = preprocess_nfs42_op(nop, op_nr, &op); 8656b140b85SBryan Schumaker break; 8666b140b85SBryan Schumaker default: 8676b140b85SBryan Schumaker status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); 8686b140b85SBryan Schumaker } 8696b140b85SBryan Schumaker 87034bc47c9SBenny Halevy if (status == htonl(NFS4ERR_OP_ILLEGAL)) 87134bc47c9SBenny Halevy op_nr = OP_CB_ILLEGAL; 872b92b3019SAndy Adamson if (status) 873b92b3019SAndy Adamson goto encode_hdr; 87431d2b435SAndy Adamson 875c36fca52SAndy Adamson if (cps->drc_status) { 876c36fca52SAndy Adamson status = cps->drc_status; 8774911096fSAndy Adamson goto encode_hdr; 8784911096fSAndy Adamson } 8794911096fSAndy Adamson 8801da177e4SLinus Torvalds maxlen = xdr_out->end - xdr_out->p; 8811da177e4SLinus Torvalds if (maxlen > 0 && maxlen < PAGE_SIZE) { 8821da177e4SLinus Torvalds status = op->decode_args(rqstp, xdr_in, argp); 883e95e60daSAndy Adamson if (likely(status == 0)) 884c36fca52SAndy Adamson status = op->process_op(argp, resp, cps); 8851da177e4SLinus Torvalds } else 8861da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 8871da177e4SLinus Torvalds 888b92b3019SAndy Adamson encode_hdr: 8891da177e4SLinus Torvalds res = encode_op_hdr(xdr_out, op_nr, status); 89031d2b435SAndy Adamson if (unlikely(res)) 89131d2b435SAndy Adamson return res; 8921da177e4SLinus Torvalds if (op->encode_res != NULL && status == 0) 8931da177e4SLinus Torvalds status = op->encode_res(rqstp, xdr_out, resp); 8943110ff80SHarvey Harrison dprintk("%s: done, status = %d\n", __func__, ntohl(status)); 8951da177e4SLinus Torvalds return status; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds /* 8991da177e4SLinus Torvalds * Decode, process and encode a COMPOUND 9001da177e4SLinus Torvalds */ 9017111c66eSAl Viro static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) 9021da177e4SLinus Torvalds { 9033a6258e1STrond Myklebust struct cb_compound_hdr_arg hdr_arg = { 0 }; 9043a6258e1STrond Myklebust struct cb_compound_hdr_res hdr_res = { NULL }; 9051da177e4SLinus Torvalds struct xdr_stream xdr_in, xdr_out; 906c36fca52SAndy Adamson __be32 *p, status; 907c36fca52SAndy Adamson struct cb_process_state cps = { 908c36fca52SAndy Adamson .drc_status = 0, 909c36fca52SAndy Adamson .clp = NULL, 9109695c705SStanislav Kinsbursky .net = SVC_NET(rqstp), 911c36fca52SAndy Adamson }; 9123a6258e1STrond Myklebust unsigned int nops = 0; 9131da177e4SLinus Torvalds 9143110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 9151da177e4SLinus Torvalds 916756b9b37STrond Myklebust xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); 9171da177e4SLinus Torvalds 9185704fdebSAl Viro p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); 9191da177e4SLinus Torvalds xdr_init_encode(&xdr_out, &rqstp->rq_res, p); 9201da177e4SLinus Torvalds 9213a6258e1STrond Myklebust status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); 9224ed0d83dSVaishali Thakkar if (status == htonl(NFS4ERR_RESOURCE)) 9233a6258e1STrond Myklebust return rpc_garbage_args; 9243a6258e1STrond Myklebust 925c36fca52SAndy Adamson if (hdr_arg.minorversion == 0) { 9269695c705SStanislav Kinsbursky cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); 927778be232SAndy Adamson if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) 928a4e187d8SChuck Lever goto out_invalidcred; 929778be232SAndy Adamson } 930c36fca52SAndy Adamson 931459de2edSBryan Schumaker cps.minorversion = hdr_arg.minorversion; 9321da177e4SLinus Torvalds hdr_res.taglen = hdr_arg.taglen; 9331da177e4SLinus Torvalds hdr_res.tag = hdr_arg.tag; 9343a6258e1STrond Myklebust if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) 9353a6258e1STrond Myklebust return rpc_system_err; 9361da177e4SLinus Torvalds 9373a6258e1STrond Myklebust while (status == 0 && nops != hdr_arg.nops) { 938459de2edSBryan Schumaker status = process_op(nops, rqstp, &xdr_in, 939459de2edSBryan Schumaker argp, &xdr_out, resp, &cps); 9401da177e4SLinus Torvalds nops++; 9411da177e4SLinus Torvalds } 9423a6258e1STrond Myklebust 94331d2b435SAndy Adamson /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return 94431d2b435SAndy Adamson * resource error in cb_compound status without returning op */ 94531d2b435SAndy Adamson if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { 94631d2b435SAndy Adamson status = htonl(NFS4ERR_RESOURCE); 94731d2b435SAndy Adamson nops--; 94831d2b435SAndy Adamson } 94931d2b435SAndy Adamson 9501da177e4SLinus Torvalds *hdr_res.status = status; 9511da177e4SLinus Torvalds *hdr_res.nops = htonl(nops); 95255a67399STrond Myklebust nfs4_cb_free_slot(&cps); 953c36fca52SAndy Adamson nfs_put_client(cps.clp); 9543110ff80SHarvey Harrison dprintk("%s: done, status = %u\n", __func__, ntohl(status)); 9551da177e4SLinus Torvalds return rpc_success; 956a4e187d8SChuck Lever 957a4e187d8SChuck Lever out_invalidcred: 958a4e187d8SChuck Lever pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); 959a4e187d8SChuck Lever return rpc_autherr_badcred; 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds /* 9631da177e4SLinus Torvalds * Define NFS4 callback COMPOUND ops. 9641da177e4SLinus Torvalds */ 9651da177e4SLinus Torvalds static struct callback_op callback_ops[] = { 9661da177e4SLinus Torvalds [0] = { 9671da177e4SLinus Torvalds .res_maxsize = CB_OP_HDR_RES_MAXSZ, 9681da177e4SLinus Torvalds }, 9691da177e4SLinus Torvalds [OP_CB_GETATTR] = { 9701da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_getattr, 9711da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_getattr_args, 9721da177e4SLinus Torvalds .encode_res = (callback_encode_res_t)encode_getattr_res, 9731da177e4SLinus Torvalds .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, 9741da177e4SLinus Torvalds }, 9751da177e4SLinus Torvalds [OP_CB_RECALL] = { 9761da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_recall, 9771da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_recall_args, 9781da177e4SLinus Torvalds .res_maxsize = CB_OP_RECALL_RES_MAXSZ, 9794aece6a1SBenny Halevy }, 9804aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 981f2a62561SFred Isaman [OP_CB_LAYOUTRECALL] = { 982f2a62561SFred Isaman .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, 983f2a62561SFred Isaman .decode_args = 984f2a62561SFred Isaman (callback_decode_arg_t)decode_layoutrecall_args, 985f2a62561SFred Isaman .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, 986f2a62561SFred Isaman }, 9871be5683bSMarc Eshel [OP_CB_NOTIFY_DEVICEID] = { 9881be5683bSMarc Eshel .process_op = (callback_process_op_t)nfs4_callback_devicenotify, 9891be5683bSMarc Eshel .decode_args = 9901be5683bSMarc Eshel (callback_decode_arg_t)decode_devicenotify_args, 9911be5683bSMarc Eshel .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, 9921be5683bSMarc Eshel }, 9934aece6a1SBenny Halevy [OP_CB_SEQUENCE] = { 9944aece6a1SBenny Halevy .process_op = (callback_process_op_t)nfs4_callback_sequence, 9954aece6a1SBenny Halevy .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, 9964aece6a1SBenny Halevy .encode_res = (callback_encode_res_t)encode_cb_sequence_res, 9974aece6a1SBenny Halevy .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, 9984aece6a1SBenny Halevy }, 99931f09607SAlexandros Batsakis [OP_CB_RECALL_ANY] = { 100031f09607SAlexandros Batsakis .process_op = (callback_process_op_t)nfs4_callback_recallany, 100131f09607SAlexandros Batsakis .decode_args = (callback_decode_arg_t)decode_recallany_args, 100231f09607SAlexandros Batsakis .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, 100331f09607SAlexandros Batsakis }, 1004b9efa1b2SAndy Adamson [OP_CB_RECALL_SLOT] = { 1005b9efa1b2SAndy Adamson .process_op = (callback_process_op_t)nfs4_callback_recallslot, 1006b9efa1b2SAndy Adamson .decode_args = (callback_decode_arg_t)decode_recallslot_args, 1007b9efa1b2SAndy Adamson .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, 1008b9efa1b2SAndy Adamson }, 10094aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 10101da177e4SLinus Torvalds }; 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds /* 10131da177e4SLinus Torvalds * Define NFS4 callback procedures 10141da177e4SLinus Torvalds */ 10151da177e4SLinus Torvalds static struct svc_procedure nfs4_callback_procedures1[] = { 10161da177e4SLinus Torvalds [CB_NULL] = { 10171da177e4SLinus Torvalds .pc_func = nfs4_callback_null, 10181da177e4SLinus Torvalds .pc_decode = (kxdrproc_t)nfs4_decode_void, 10191da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 10201da177e4SLinus Torvalds .pc_xdrressize = 1, 10211da177e4SLinus Torvalds }, 10221da177e4SLinus Torvalds [CB_COMPOUND] = { 10231da177e4SLinus Torvalds .pc_func = nfs4_callback_compound, 10241da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 10251da177e4SLinus Torvalds .pc_argsize = 256, 10261da177e4SLinus Torvalds .pc_ressize = 256, 10271da177e4SLinus Torvalds .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds }; 10301da177e4SLinus Torvalds 10311da177e4SLinus Torvalds struct svc_version nfs4_callback_version1 = { 10321da177e4SLinus Torvalds .vs_vers = 1, 10331da177e4SLinus Torvalds .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 10341da177e4SLinus Torvalds .vs_proc = nfs4_callback_procedures1, 10351da177e4SLinus Torvalds .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 10361da177e4SLinus Torvalds .vs_dispatch = NULL, 103749697ee7SSteve Dickson .vs_hidden = 1, 10381da177e4SLinus Torvalds }; 10391da177e4SLinus Torvalds 104007bccc2dSAlexandros Batsakis struct svc_version nfs4_callback_version4 = { 104107bccc2dSAlexandros Batsakis .vs_vers = 4, 104207bccc2dSAlexandros Batsakis .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 104307bccc2dSAlexandros Batsakis .vs_proc = nfs4_callback_procedures1, 104407bccc2dSAlexandros Batsakis .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 104507bccc2dSAlexandros Batsakis .vs_dispatch = NULL, 10466070295eSJeff Layton .vs_hidden = 1, 104707bccc2dSAlexandros Batsakis }; 1048