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) 221da177e4SLinus Torvalds #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) 231da177e4SLinus Torvalds #define CB_OP_GETATTR_BITMAP_MAXSZ (4) 241da177e4SLinus Torvalds #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 251da177e4SLinus Torvalds CB_OP_GETATTR_BITMAP_MAXSZ + \ 261da177e4SLinus Torvalds 2 + 2 + 3 + 3) 271da177e4SLinus Torvalds #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 281da177e4SLinus Torvalds 294aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 30f2a62561SFred Isaman #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 311be5683bSMarc Eshel #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 324aece6a1SBenny Halevy #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 334aece6a1SBenny Halevy 4 + 1 + 3) 3431f09607SAlexandros Batsakis #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 35b9efa1b2SAndy Adamson #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 364aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 374aece6a1SBenny Halevy 381da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_CALLBACK 391da177e4SLinus Torvalds 4031d2b435SAndy Adamson /* Internal error code */ 4131d2b435SAndy Adamson #define NFS4ERR_RESOURCE_HDR 11050 4231d2b435SAndy Adamson 43c36fca52SAndy Adamson typedef __be32 (*callback_process_op_t)(void *, void *, 44c36fca52SAndy Adamson struct cb_process_state *); 45e6f684f6SAl Viro typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); 46e6f684f6SAl Viro typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds struct callback_op { 501da177e4SLinus Torvalds callback_process_op_t process_op; 511da177e4SLinus Torvalds callback_decode_arg_t decode_args; 521da177e4SLinus Torvalds callback_encode_res_t encode_res; 531da177e4SLinus Torvalds long res_maxsize; 541da177e4SLinus Torvalds }; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct callback_op callback_ops[]; 571da177e4SLinus Torvalds 587111c66eSAl Viro static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds return htonl(NFS4_OK); 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds 635704fdebSAl Viro static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 641da177e4SLinus Torvalds { 651da177e4SLinus Torvalds return xdr_argsize_check(rqstp, p); 661da177e4SLinus Torvalds } 671da177e4SLinus Torvalds 685704fdebSAl Viro static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 691da177e4SLinus Torvalds { 701da177e4SLinus Torvalds return xdr_ressize_check(rqstp, p); 711da177e4SLinus Torvalds } 721da177e4SLinus Torvalds 735704fdebSAl Viro static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) 741da177e4SLinus Torvalds { 755704fdebSAl Viro __be32 *p; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds p = xdr_inline_decode(xdr, nbytes); 781da177e4SLinus Torvalds if (unlikely(p == NULL)) 79a030889aSWeston Andros Adamson printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); 801da177e4SLinus Torvalds return p; 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds 83e6f684f6SAl Viro static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) 841da177e4SLinus Torvalds { 855704fdebSAl Viro __be32 *p; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds p = read_buf(xdr, 4); 881da177e4SLinus Torvalds if (unlikely(p == NULL)) 891da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 901da177e4SLinus Torvalds *len = ntohl(*p); 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds if (*len != 0) { 931da177e4SLinus Torvalds p = read_buf(xdr, *len); 941da177e4SLinus Torvalds if (unlikely(p == NULL)) 951da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 961da177e4SLinus Torvalds *str = (const char *)p; 971da177e4SLinus Torvalds } else 981da177e4SLinus Torvalds *str = NULL; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds return 0; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 103e6f684f6SAl Viro static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) 1041da177e4SLinus Torvalds { 1055704fdebSAl Viro __be32 *p; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds p = read_buf(xdr, 4); 1081da177e4SLinus Torvalds if (unlikely(p == NULL)) 1091da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1101da177e4SLinus Torvalds fh->size = ntohl(*p); 1111da177e4SLinus Torvalds if (fh->size > NFS4_FHSIZE) 1121da177e4SLinus Torvalds return htonl(NFS4ERR_BADHANDLE); 1131da177e4SLinus Torvalds p = read_buf(xdr, fh->size); 1141da177e4SLinus Torvalds if (unlikely(p == NULL)) 1151da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1161da177e4SLinus Torvalds memcpy(&fh->data[0], p, fh->size); 1171da177e4SLinus Torvalds memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); 1181da177e4SLinus Torvalds return 0; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 121e6f684f6SAl Viro static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) 1221da177e4SLinus Torvalds { 1235704fdebSAl Viro __be32 *p; 1241da177e4SLinus Torvalds unsigned int attrlen; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds p = read_buf(xdr, 4); 1271da177e4SLinus Torvalds if (unlikely(p == NULL)) 1281da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1291da177e4SLinus Torvalds attrlen = ntohl(*p); 1301da177e4SLinus Torvalds p = read_buf(xdr, attrlen << 2); 1311da177e4SLinus Torvalds if (unlikely(p == NULL)) 1321da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1331da177e4SLinus Torvalds if (likely(attrlen > 0)) 1341da177e4SLinus Torvalds bitmap[0] = ntohl(*p++); 1351da177e4SLinus Torvalds if (attrlen > 1) 1361da177e4SLinus Torvalds bitmap[1] = ntohl(*p); 1371da177e4SLinus Torvalds return 0; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 140e6f684f6SAl Viro static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 1411da177e4SLinus Torvalds { 1425704fdebSAl Viro __be32 *p; 1431da177e4SLinus Torvalds 1442d2f24adSTrond Myklebust p = read_buf(xdr, NFS4_STATEID_SIZE); 1451da177e4SLinus Torvalds if (unlikely(p == NULL)) 1461da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1472d2f24adSTrond Myklebust memcpy(stateid, p, NFS4_STATEID_SIZE); 1481da177e4SLinus Torvalds return 0; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 151e6f684f6SAl Viro static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) 1521da177e4SLinus Torvalds { 1535704fdebSAl Viro __be32 *p; 154e6f684f6SAl Viro __be32 status; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds status = decode_string(xdr, &hdr->taglen, &hdr->tag); 1571da177e4SLinus Torvalds if (unlikely(status != 0)) 1581da177e4SLinus Torvalds return status; 1591da177e4SLinus Torvalds /* We do not like overly long tags! */ 1605cce428dSChuck Lever if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { 161a030889aSWeston Andros Adamson printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n", 1623110ff80SHarvey Harrison __func__, hdr->taglen); 1631da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds p = read_buf(xdr, 12); 1661da177e4SLinus Torvalds if (unlikely(p == NULL)) 1671da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 168b8f2ef84SBenny Halevy hdr->minorversion = ntohl(*p++); 169459de2edSBryan Schumaker /* Check for minor version support */ 170459de2edSBryan Schumaker if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { 17142c2c424SSteve Dickson hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ 17248a9e2d2SBenny Halevy } else { 1739a3ba432STrond Myklebust pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " 174b8f2ef84SBenny Halevy "illegal minor version %u!\n", 175b8f2ef84SBenny Halevy __func__, hdr->minorversion); 1761da177e4SLinus Torvalds return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds hdr->nops = ntohl(*p); 179b8f2ef84SBenny Halevy dprintk("%s: minorversion %d nops %d\n", __func__, 180b8f2ef84SBenny Halevy hdr->minorversion, hdr->nops); 1811da177e4SLinus Torvalds return 0; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds 184e6f684f6SAl Viro static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) 1851da177e4SLinus Torvalds { 1865704fdebSAl Viro __be32 *p; 1871da177e4SLinus Torvalds p = read_buf(xdr, 4); 1881da177e4SLinus Torvalds if (unlikely(p == NULL)) 18931d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 1901da177e4SLinus Torvalds *op = ntohl(*p); 1911da177e4SLinus Torvalds return 0; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 194e6f684f6SAl Viro static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) 1951da177e4SLinus Torvalds { 196e6f684f6SAl Viro __be32 status; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 1991da177e4SLinus Torvalds if (unlikely(status != 0)) 2001da177e4SLinus Torvalds goto out; 2011da177e4SLinus Torvalds status = decode_bitmap(xdr, args->bitmap); 2021da177e4SLinus Torvalds out: 2033110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2041da177e4SLinus Torvalds return status; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 207e6f684f6SAl Viro static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) 2081da177e4SLinus Torvalds { 2095704fdebSAl Viro __be32 *p; 210e6f684f6SAl Viro __be32 status; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds status = decode_stateid(xdr, &args->stateid); 2131da177e4SLinus Torvalds if (unlikely(status != 0)) 2141da177e4SLinus Torvalds goto out; 2151da177e4SLinus Torvalds p = read_buf(xdr, 4); 2161da177e4SLinus Torvalds if (unlikely(p == NULL)) { 2171da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 2181da177e4SLinus Torvalds goto out; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds args->truncate = ntohl(*p); 2211da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 2221da177e4SLinus Torvalds out: 2233110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2243873bc50SAlexey Dobriyan return status; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 2274aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 2284aece6a1SBenny Halevy 229f2a62561SFred Isaman static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, 230f2a62561SFred Isaman struct xdr_stream *xdr, 231f2a62561SFred Isaman struct cb_layoutrecallargs *args) 232f2a62561SFred Isaman { 233f2a62561SFred Isaman __be32 *p; 234f2a62561SFred Isaman __be32 status = 0; 235f2a62561SFred Isaman uint32_t iomode; 236f2a62561SFred Isaman 237f2a62561SFred Isaman p = read_buf(xdr, 4 * sizeof(uint32_t)); 238f2a62561SFred Isaman if (unlikely(p == NULL)) { 239f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 240f2a62561SFred Isaman goto out; 241f2a62561SFred Isaman } 242f2a62561SFred Isaman 243f2a62561SFred Isaman args->cbl_layout_type = ntohl(*p++); 244f2a62561SFred Isaman /* Depite the spec's xdr, iomode really belongs in the FILE switch, 24525985edcSLucas De Marchi * as it is unusable and ignored with the other types. 246f2a62561SFred Isaman */ 247f2a62561SFred Isaman iomode = ntohl(*p++); 248f2a62561SFred Isaman args->cbl_layoutchanged = ntohl(*p++); 249f2a62561SFred Isaman args->cbl_recall_type = ntohl(*p++); 250f2a62561SFred Isaman 251f2a62561SFred Isaman if (args->cbl_recall_type == RETURN_FILE) { 252f2a62561SFred Isaman args->cbl_range.iomode = iomode; 253f2a62561SFred Isaman status = decode_fh(xdr, &args->cbl_fh); 254f2a62561SFred Isaman if (unlikely(status != 0)) 255f2a62561SFred Isaman goto out; 256f2a62561SFred Isaman 257f2a62561SFred Isaman p = read_buf(xdr, 2 * sizeof(uint64_t)); 258f2a62561SFred Isaman if (unlikely(p == NULL)) { 259f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 260f2a62561SFred Isaman goto out; 261f2a62561SFred Isaman } 262f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_range.offset); 263f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_range.length); 264f2a62561SFred Isaman status = decode_stateid(xdr, &args->cbl_stateid); 265f2a62561SFred Isaman if (unlikely(status != 0)) 266f2a62561SFred Isaman goto out; 267f2a62561SFred Isaman } else if (args->cbl_recall_type == RETURN_FSID) { 268f2a62561SFred Isaman p = read_buf(xdr, 2 * sizeof(uint64_t)); 269f2a62561SFred Isaman if (unlikely(p == NULL)) { 270f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 271f2a62561SFred Isaman goto out; 272f2a62561SFred Isaman } 273f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_fsid.major); 274f2a62561SFred Isaman p = xdr_decode_hyper(p, &args->cbl_fsid.minor); 275f2a62561SFred Isaman } else if (args->cbl_recall_type != RETURN_ALL) { 276f2a62561SFred Isaman status = htonl(NFS4ERR_BADXDR); 277f2a62561SFred Isaman goto out; 278f2a62561SFred Isaman } 279f2a62561SFred Isaman dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", 280f2a62561SFred Isaman __func__, 281f2a62561SFred Isaman args->cbl_layout_type, iomode, 282f2a62561SFred Isaman args->cbl_layoutchanged, args->cbl_recall_type); 283f2a62561SFred Isaman out: 284f2a62561SFred Isaman dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 285f2a62561SFred Isaman return status; 286f2a62561SFred Isaman } 287f2a62561SFred Isaman 2881be5683bSMarc Eshel static 2891be5683bSMarc Eshel __be32 decode_devicenotify_args(struct svc_rqst *rqstp, 2901be5683bSMarc Eshel struct xdr_stream *xdr, 2911be5683bSMarc Eshel struct cb_devicenotifyargs *args) 2921be5683bSMarc Eshel { 2931be5683bSMarc Eshel __be32 *p; 2941be5683bSMarc Eshel __be32 status = 0; 2951be5683bSMarc Eshel u32 tmp; 2961be5683bSMarc Eshel int n, i; 2971be5683bSMarc Eshel args->ndevs = 0; 2981be5683bSMarc Eshel 2991be5683bSMarc Eshel /* Num of device notifications */ 3001be5683bSMarc Eshel p = read_buf(xdr, sizeof(uint32_t)); 3011be5683bSMarc Eshel if (unlikely(p == NULL)) { 3021be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3031be5683bSMarc Eshel goto out; 3041be5683bSMarc Eshel } 3051be5683bSMarc Eshel n = ntohl(*p++); 3061be5683bSMarc Eshel if (n <= 0) 3071be5683bSMarc Eshel goto out; 308363e0df0SDan Carpenter if (n > ULONG_MAX / sizeof(*args->devs)) { 309363e0df0SDan Carpenter status = htonl(NFS4ERR_BADXDR); 310363e0df0SDan Carpenter goto out; 311363e0df0SDan Carpenter } 3121be5683bSMarc Eshel 313a4f743a6STrond Myklebust args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); 3141be5683bSMarc Eshel if (!args->devs) { 3151be5683bSMarc Eshel status = htonl(NFS4ERR_DELAY); 3161be5683bSMarc Eshel goto out; 3171be5683bSMarc Eshel } 3181be5683bSMarc Eshel 3191be5683bSMarc Eshel /* Decode each dev notification */ 3201be5683bSMarc Eshel for (i = 0; i < n; i++) { 3211be5683bSMarc Eshel struct cb_devicenotifyitem *dev = &args->devs[i]; 3221be5683bSMarc Eshel 3231be5683bSMarc Eshel p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); 3241be5683bSMarc Eshel if (unlikely(p == NULL)) { 3251be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3261be5683bSMarc Eshel goto err; 3271be5683bSMarc Eshel } 3281be5683bSMarc Eshel 3291be5683bSMarc Eshel tmp = ntohl(*p++); /* bitmap size */ 3301be5683bSMarc Eshel if (tmp != 1) { 3311be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3321be5683bSMarc Eshel goto err; 3331be5683bSMarc Eshel } 3341be5683bSMarc Eshel dev->cbd_notify_type = ntohl(*p++); 3351be5683bSMarc Eshel if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && 3361be5683bSMarc Eshel dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { 3371be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3381be5683bSMarc Eshel goto err; 3391be5683bSMarc Eshel } 3401be5683bSMarc Eshel 3411be5683bSMarc Eshel tmp = ntohl(*p++); /* opaque size */ 3421be5683bSMarc Eshel if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && 3431be5683bSMarc Eshel (tmp != NFS4_DEVICEID4_SIZE + 8)) || 3441be5683bSMarc Eshel ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && 3451be5683bSMarc Eshel (tmp != NFS4_DEVICEID4_SIZE + 4))) { 3461be5683bSMarc Eshel status = htonl(NFS4ERR_INVAL); 3471be5683bSMarc Eshel goto err; 3481be5683bSMarc Eshel } 3491be5683bSMarc Eshel dev->cbd_layout_type = ntohl(*p++); 3501be5683bSMarc Eshel memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); 3511be5683bSMarc Eshel p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); 3521be5683bSMarc Eshel 3531be5683bSMarc Eshel if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { 3541be5683bSMarc Eshel p = read_buf(xdr, sizeof(uint32_t)); 3551be5683bSMarc Eshel if (unlikely(p == NULL)) { 3561be5683bSMarc Eshel status = htonl(NFS4ERR_BADXDR); 3571be5683bSMarc Eshel goto err; 3581be5683bSMarc Eshel } 3591be5683bSMarc Eshel dev->cbd_immediate = ntohl(*p++); 3601be5683bSMarc Eshel } else { 3611be5683bSMarc Eshel dev->cbd_immediate = 0; 3621be5683bSMarc Eshel } 3631be5683bSMarc Eshel 3641be5683bSMarc Eshel args->ndevs++; 3651be5683bSMarc Eshel 3661be5683bSMarc Eshel dprintk("%s: type %d layout 0x%x immediate %d\n", 3671be5683bSMarc Eshel __func__, dev->cbd_notify_type, dev->cbd_layout_type, 3681be5683bSMarc Eshel dev->cbd_immediate); 3691be5683bSMarc Eshel } 3701be5683bSMarc Eshel out: 3711be5683bSMarc Eshel dprintk("%s: status %d ndevs %d\n", 3721be5683bSMarc Eshel __func__, ntohl(status), args->ndevs); 3731be5683bSMarc Eshel return status; 3741be5683bSMarc Eshel err: 3751be5683bSMarc Eshel kfree(args->devs); 3761be5683bSMarc Eshel goto out; 3771be5683bSMarc Eshel } 3781be5683bSMarc Eshel 3799733f0d9SAndy Adamson static __be32 decode_sessionid(struct xdr_stream *xdr, 3804aece6a1SBenny Halevy struct nfs4_sessionid *sid) 3814aece6a1SBenny Halevy { 3829733f0d9SAndy Adamson __be32 *p; 3834aece6a1SBenny Halevy 384590184a6SKinglong Mee p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); 3854aece6a1SBenny Halevy if (unlikely(p == NULL)) 386a419aef8SJoe Perches return htonl(NFS4ERR_RESOURCE); 3874aece6a1SBenny Halevy 388590184a6SKinglong Mee memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); 3894aece6a1SBenny Halevy return 0; 3904aece6a1SBenny Halevy } 3914aece6a1SBenny Halevy 3929733f0d9SAndy Adamson static __be32 decode_rc_list(struct xdr_stream *xdr, 3934aece6a1SBenny Halevy struct referring_call_list *rc_list) 3944aece6a1SBenny Halevy { 3959733f0d9SAndy Adamson __be32 *p; 3964aece6a1SBenny Halevy int i; 3979733f0d9SAndy Adamson __be32 status; 3984aece6a1SBenny Halevy 3994aece6a1SBenny Halevy status = decode_sessionid(xdr, &rc_list->rcl_sessionid); 4004aece6a1SBenny Halevy if (status) 4014aece6a1SBenny Halevy goto out; 4024aece6a1SBenny Halevy 4034aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4044aece6a1SBenny Halevy p = read_buf(xdr, sizeof(uint32_t)); 4054aece6a1SBenny Halevy if (unlikely(p == NULL)) 4064aece6a1SBenny Halevy goto out; 4074aece6a1SBenny Halevy 4084aece6a1SBenny Halevy rc_list->rcl_nrefcalls = ntohl(*p++); 4094aece6a1SBenny Halevy if (rc_list->rcl_nrefcalls) { 4104aece6a1SBenny Halevy p = read_buf(xdr, 4114aece6a1SBenny Halevy rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); 4124aece6a1SBenny Halevy if (unlikely(p == NULL)) 4134aece6a1SBenny Halevy goto out; 414a4f743a6STrond Myklebust rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, 4154aece6a1SBenny Halevy sizeof(*rc_list->rcl_refcalls), 4164aece6a1SBenny Halevy GFP_KERNEL); 4174aece6a1SBenny Halevy if (unlikely(rc_list->rcl_refcalls == NULL)) 4184aece6a1SBenny Halevy goto out; 4194aece6a1SBenny Halevy for (i = 0; i < rc_list->rcl_nrefcalls; i++) { 4204aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); 4214aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); 4224aece6a1SBenny Halevy } 4234aece6a1SBenny Halevy } 4244aece6a1SBenny Halevy status = 0; 4254aece6a1SBenny Halevy 4264aece6a1SBenny Halevy out: 4274aece6a1SBenny Halevy return status; 4284aece6a1SBenny Halevy } 4294aece6a1SBenny Halevy 4309733f0d9SAndy Adamson static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, 4314aece6a1SBenny Halevy struct xdr_stream *xdr, 4324aece6a1SBenny Halevy struct cb_sequenceargs *args) 4334aece6a1SBenny Halevy { 4349733f0d9SAndy Adamson __be32 *p; 4354aece6a1SBenny Halevy int i; 4369733f0d9SAndy Adamson __be32 status; 4374aece6a1SBenny Halevy 4384aece6a1SBenny Halevy status = decode_sessionid(xdr, &args->csa_sessionid); 4394aece6a1SBenny Halevy if (status) 4404aece6a1SBenny Halevy goto out; 4414aece6a1SBenny Halevy 4424aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4434aece6a1SBenny Halevy p = read_buf(xdr, 5 * sizeof(uint32_t)); 4444aece6a1SBenny Halevy if (unlikely(p == NULL)) 4454aece6a1SBenny Halevy goto out; 4464aece6a1SBenny Halevy 44765fc64e5SRicardo Labiaga args->csa_addr = svc_addr(rqstp); 4484aece6a1SBenny Halevy args->csa_sequenceid = ntohl(*p++); 4494aece6a1SBenny Halevy args->csa_slotid = ntohl(*p++); 4504aece6a1SBenny Halevy args->csa_highestslotid = ntohl(*p++); 4514aece6a1SBenny Halevy args->csa_cachethis = ntohl(*p++); 4524aece6a1SBenny Halevy args->csa_nrclists = ntohl(*p++); 4534aece6a1SBenny Halevy args->csa_rclists = NULL; 4544aece6a1SBenny Halevy if (args->csa_nrclists) { 4550439f31cSDan Carpenter args->csa_rclists = kmalloc_array(args->csa_nrclists, 4564aece6a1SBenny Halevy sizeof(*args->csa_rclists), 4574aece6a1SBenny Halevy GFP_KERNEL); 4584aece6a1SBenny Halevy if (unlikely(args->csa_rclists == NULL)) 4594aece6a1SBenny Halevy goto out; 4604aece6a1SBenny Halevy 4614aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) { 4624aece6a1SBenny Halevy status = decode_rc_list(xdr, &args->csa_rclists[i]); 463d8ba1f97STrond Myklebust if (status) { 464d8ba1f97STrond Myklebust args->csa_nrclists = i; 4654aece6a1SBenny Halevy goto out_free; 4664aece6a1SBenny Halevy } 4674aece6a1SBenny Halevy } 468d8ba1f97STrond Myklebust } 4694aece6a1SBenny Halevy status = 0; 4704aece6a1SBenny Halevy 4714aece6a1SBenny Halevy dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " 4724aece6a1SBenny Halevy "highestslotid %u cachethis %d nrclists %u\n", 4734aece6a1SBenny Halevy __func__, 4744aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[0], 4754aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[1], 4764aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[2], 4774aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[3], 4784aece6a1SBenny Halevy args->csa_sequenceid, args->csa_slotid, 4794aece6a1SBenny Halevy args->csa_highestslotid, args->csa_cachethis, 4804aece6a1SBenny Halevy args->csa_nrclists); 4814aece6a1SBenny Halevy out: 4824aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 4834aece6a1SBenny Halevy return status; 4844aece6a1SBenny Halevy 4854aece6a1SBenny Halevy out_free: 4864aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) 4874aece6a1SBenny Halevy kfree(args->csa_rclists[i].rcl_refcalls); 4884aece6a1SBenny Halevy kfree(args->csa_rclists); 4894aece6a1SBenny Halevy goto out; 4904aece6a1SBenny Halevy } 4914aece6a1SBenny Halevy 4929733f0d9SAndy Adamson static __be32 decode_recallany_args(struct svc_rqst *rqstp, 49331f09607SAlexandros Batsakis struct xdr_stream *xdr, 49431f09607SAlexandros Batsakis struct cb_recallanyargs *args) 49531f09607SAlexandros Batsakis { 496d743c3c9SPeng Tao uint32_t bitmap[2]; 497d743c3c9SPeng Tao __be32 *p, status; 49831f09607SAlexandros Batsakis 49931f09607SAlexandros Batsakis p = read_buf(xdr, 4); 50031f09607SAlexandros Batsakis if (unlikely(p == NULL)) 50131f09607SAlexandros Batsakis return htonl(NFS4ERR_BADXDR); 50231f09607SAlexandros Batsakis args->craa_objs_to_keep = ntohl(*p++); 503d743c3c9SPeng Tao status = decode_bitmap(xdr, bitmap); 504d743c3c9SPeng Tao if (unlikely(status)) 505d743c3c9SPeng Tao return status; 506d743c3c9SPeng Tao args->craa_type_mask = bitmap[0]; 50731f09607SAlexandros Batsakis 50831f09607SAlexandros Batsakis return 0; 50931f09607SAlexandros Batsakis } 51031f09607SAlexandros Batsakis 5119733f0d9SAndy Adamson static __be32 decode_recallslot_args(struct svc_rqst *rqstp, 512b9efa1b2SAndy Adamson struct xdr_stream *xdr, 513b9efa1b2SAndy Adamson struct cb_recallslotargs *args) 514b9efa1b2SAndy Adamson { 515b9efa1b2SAndy Adamson __be32 *p; 516b9efa1b2SAndy Adamson 517b9efa1b2SAndy Adamson p = read_buf(xdr, 4); 518b9efa1b2SAndy Adamson if (unlikely(p == NULL)) 519b9efa1b2SAndy Adamson return htonl(NFS4ERR_BADXDR); 520d5fb4ce3STrond Myklebust args->crsa_target_highest_slotid = ntohl(*p++); 521b9efa1b2SAndy Adamson return 0; 522b9efa1b2SAndy Adamson } 523b9efa1b2SAndy Adamson 5244aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 5254aece6a1SBenny Halevy 526e6f684f6SAl Viro static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) 5271da177e4SLinus Torvalds { 5285704fdebSAl Viro __be32 *p; 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 4 + len); 5311da177e4SLinus Torvalds if (unlikely(p == NULL)) 5321da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5331da177e4SLinus Torvalds xdr_encode_opaque(p, str, len); 5341da177e4SLinus Torvalds return 0; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) 5381da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) 5395704fdebSAl Viro static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) 5401da177e4SLinus Torvalds { 5415704fdebSAl Viro __be32 bm[2]; 5425704fdebSAl Viro __be32 *p; 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); 5451da177e4SLinus Torvalds bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); 5461da177e4SLinus Torvalds if (bm[1] != 0) { 5471da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 16); 5481da177e4SLinus Torvalds if (unlikely(p == NULL)) 5491da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5501da177e4SLinus Torvalds *p++ = htonl(2); 5511da177e4SLinus Torvalds *p++ = bm[0]; 5521da177e4SLinus Torvalds *p++ = bm[1]; 5531da177e4SLinus Torvalds } else if (bm[0] != 0) { 5541da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 5551da177e4SLinus Torvalds if (unlikely(p == NULL)) 5561da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5571da177e4SLinus Torvalds *p++ = htonl(1); 5581da177e4SLinus Torvalds *p++ = bm[0]; 5591da177e4SLinus Torvalds } else { 5601da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 5611da177e4SLinus Torvalds if (unlikely(p == NULL)) 5621da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5631da177e4SLinus Torvalds *p++ = htonl(0); 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds *savep = p; 5661da177e4SLinus Torvalds return 0; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds 569e6f684f6SAl Viro static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) 5701da177e4SLinus Torvalds { 5715704fdebSAl Viro __be32 *p; 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) 5741da177e4SLinus Torvalds return 0; 5751da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 57690dc7d27SHarvey Harrison if (unlikely(!p)) 5771da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5781da177e4SLinus Torvalds p = xdr_encode_hyper(p, change); 5791da177e4SLinus Torvalds return 0; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 582e6f684f6SAl Viro static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) 5831da177e4SLinus Torvalds { 5845704fdebSAl Viro __be32 *p; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_SIZE)) 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, size); 5921da177e4SLinus Torvalds return 0; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 595e6f684f6SAl Viro static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) 5961da177e4SLinus Torvalds { 5975704fdebSAl Viro __be32 *p; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 60090dc7d27SHarvey Harrison if (unlikely(!p)) 6011da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6021da177e4SLinus Torvalds p = xdr_encode_hyper(p, time->tv_sec); 6031da177e4SLinus Torvalds *p = htonl(time->tv_nsec); 6041da177e4SLinus Torvalds return 0; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds 607e6f684f6SAl Viro static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6081da177e4SLinus Torvalds { 6091da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) 6101da177e4SLinus Torvalds return 0; 6111da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds 614e6f684f6SAl Viro static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6151da177e4SLinus Torvalds { 6161da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) 6171da177e4SLinus Torvalds return 0; 6181da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 621e6f684f6SAl Viro static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) 6221da177e4SLinus Torvalds { 623e6f684f6SAl Viro __be32 status; 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds hdr->status = xdr_reserve_space(xdr, 4); 6261da177e4SLinus Torvalds if (unlikely(hdr->status == NULL)) 6271da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6281da177e4SLinus Torvalds status = encode_string(xdr, hdr->taglen, hdr->tag); 6291da177e4SLinus Torvalds if (unlikely(status != 0)) 6301da177e4SLinus Torvalds return status; 6311da177e4SLinus Torvalds hdr->nops = xdr_reserve_space(xdr, 4); 6321da177e4SLinus Torvalds if (unlikely(hdr->nops == NULL)) 6331da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6341da177e4SLinus Torvalds return 0; 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds 637e6f684f6SAl Viro static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) 6381da177e4SLinus Torvalds { 6395704fdebSAl Viro __be32 *p; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 6421da177e4SLinus Torvalds if (unlikely(p == NULL)) 64331d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 6441da177e4SLinus Torvalds *p++ = htonl(op); 6451da177e4SLinus Torvalds *p = res; 6461da177e4SLinus Torvalds return 0; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 649e6f684f6SAl Viro static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) 6501da177e4SLinus Torvalds { 6515704fdebSAl Viro __be32 *savep = NULL; 652e6f684f6SAl Viro __be32 status = res->status; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds if (unlikely(status != 0)) 6551da177e4SLinus Torvalds goto out; 6561da177e4SLinus Torvalds status = encode_attr_bitmap(xdr, res->bitmap, &savep); 6571da177e4SLinus Torvalds if (unlikely(status != 0)) 6581da177e4SLinus Torvalds goto out; 6591da177e4SLinus Torvalds status = encode_attr_change(xdr, res->bitmap, res->change_attr); 6601da177e4SLinus Torvalds if (unlikely(status != 0)) 6611da177e4SLinus Torvalds goto out; 6621da177e4SLinus Torvalds status = encode_attr_size(xdr, res->bitmap, res->size); 6631da177e4SLinus Torvalds if (unlikely(status != 0)) 6641da177e4SLinus Torvalds goto out; 6651da177e4SLinus Torvalds status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); 6661da177e4SLinus Torvalds if (unlikely(status != 0)) 6671da177e4SLinus Torvalds goto out; 6681da177e4SLinus Torvalds status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); 6691da177e4SLinus Torvalds *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); 6701da177e4SLinus Torvalds out: 6713110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 6721da177e4SLinus Torvalds return status; 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 67534bc47c9SBenny Halevy #if defined(CONFIG_NFS_V4_1) 67634bc47c9SBenny Halevy 6779733f0d9SAndy Adamson static __be32 encode_sessionid(struct xdr_stream *xdr, 6784aece6a1SBenny Halevy const struct nfs4_sessionid *sid) 6794aece6a1SBenny Halevy { 6809733f0d9SAndy Adamson __be32 *p; 6814aece6a1SBenny Halevy 682590184a6SKinglong Mee p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); 6834aece6a1SBenny Halevy if (unlikely(p == NULL)) 6844aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 6854aece6a1SBenny Halevy 686590184a6SKinglong Mee memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); 6874aece6a1SBenny Halevy return 0; 6884aece6a1SBenny Halevy } 6894aece6a1SBenny Halevy 6909733f0d9SAndy Adamson static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, 6914aece6a1SBenny Halevy struct xdr_stream *xdr, 6924aece6a1SBenny Halevy const struct cb_sequenceres *res) 6934aece6a1SBenny Halevy { 6949733f0d9SAndy Adamson __be32 *p; 695e216c8c7SDan Carpenter __be32 status = res->csr_status; 6964aece6a1SBenny Halevy 6974aece6a1SBenny Halevy if (unlikely(status != 0)) 6984aece6a1SBenny Halevy goto out; 6994aece6a1SBenny Halevy 7004aece6a1SBenny Halevy encode_sessionid(xdr, &res->csr_sessionid); 7014aece6a1SBenny Halevy 7024aece6a1SBenny Halevy p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); 7034aece6a1SBenny Halevy if (unlikely(p == NULL)) 7044aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 7054aece6a1SBenny Halevy 7064aece6a1SBenny Halevy *p++ = htonl(res->csr_sequenceid); 7074aece6a1SBenny Halevy *p++ = htonl(res->csr_slotid); 7084aece6a1SBenny Halevy *p++ = htonl(res->csr_highestslotid); 7094aece6a1SBenny Halevy *p++ = htonl(res->csr_target_highestslotid); 7104aece6a1SBenny Halevy out: 7114aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 7124aece6a1SBenny Halevy return status; 7134aece6a1SBenny Halevy } 7144aece6a1SBenny Halevy 71534bc47c9SBenny Halevy static __be32 71634bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 71734bc47c9SBenny Halevy { 718281fe15dSBenny Halevy if (op_nr == OP_CB_SEQUENCE) { 719281fe15dSBenny Halevy if (nop != 0) 720281fe15dSBenny Halevy return htonl(NFS4ERR_SEQUENCE_POS); 721281fe15dSBenny Halevy } else { 722281fe15dSBenny Halevy if (nop == 0) 723281fe15dSBenny Halevy return htonl(NFS4ERR_OP_NOT_IN_SESSION); 724281fe15dSBenny Halevy } 725281fe15dSBenny Halevy 72634bc47c9SBenny Halevy switch (op_nr) { 72734bc47c9SBenny Halevy case OP_CB_GETATTR: 72834bc47c9SBenny Halevy case OP_CB_RECALL: 7294aece6a1SBenny Halevy case OP_CB_SEQUENCE: 73031f09607SAlexandros Batsakis case OP_CB_RECALL_ANY: 731b9efa1b2SAndy Adamson case OP_CB_RECALL_SLOT: 732f2a62561SFred Isaman case OP_CB_LAYOUTRECALL: 7331be5683bSMarc Eshel case OP_CB_NOTIFY_DEVICEID: 73434bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 73534bc47c9SBenny Halevy break; 73634bc47c9SBenny Halevy 73734bc47c9SBenny Halevy case OP_CB_NOTIFY: 73834bc47c9SBenny Halevy case OP_CB_PUSH_DELEG: 73934bc47c9SBenny Halevy case OP_CB_RECALLABLE_OBJ_AVAIL: 74034bc47c9SBenny Halevy case OP_CB_WANTS_CANCELLED: 74134bc47c9SBenny Halevy case OP_CB_NOTIFY_LOCK: 74234bc47c9SBenny Halevy return htonl(NFS4ERR_NOTSUPP); 74334bc47c9SBenny Halevy 74434bc47c9SBenny Halevy default: 74534bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 74634bc47c9SBenny Halevy } 74734bc47c9SBenny Halevy 74834bc47c9SBenny Halevy return htonl(NFS_OK); 74934bc47c9SBenny Halevy } 75034bc47c9SBenny Halevy 75142acd021SAndy Adamson static void nfs4_callback_free_slot(struct nfs4_session *session) 75242acd021SAndy Adamson { 75342acd021SAndy Adamson struct nfs4_slot_table *tbl = &session->bc_slot_table; 75442acd021SAndy Adamson 75542acd021SAndy Adamson spin_lock(&tbl->slot_tbl_lock); 75642acd021SAndy Adamson /* 75742acd021SAndy Adamson * Let the state manager know callback processing done. 75842acd021SAndy Adamson * A single slot, so highest used slotid is either 0 or -1 75942acd021SAndy Adamson */ 76045d43c29STrond Myklebust tbl->highest_used_slotid = NFS4_NO_SLOT; 761774d5f14SAndy Adamson nfs4_slot_tbl_drain_complete(tbl); 76242acd021SAndy Adamson spin_unlock(&tbl->slot_tbl_lock); 76342acd021SAndy Adamson } 76442acd021SAndy Adamson 76555a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 76642acd021SAndy Adamson { 76745d43c29STrond Myklebust if (cps->slotid != NFS4_NO_SLOT) 76855a67399STrond Myklebust nfs4_callback_free_slot(cps->clp->cl_session); 76942acd021SAndy Adamson } 77042acd021SAndy Adamson 77134bc47c9SBenny Halevy #else /* CONFIG_NFS_V4_1 */ 77234bc47c9SBenny Halevy 77334bc47c9SBenny Halevy static __be32 77434bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 77534bc47c9SBenny Halevy { 77634bc47c9SBenny Halevy return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 77734bc47c9SBenny Halevy } 77834bc47c9SBenny Halevy 77955a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 78042acd021SAndy Adamson { 78142acd021SAndy Adamson } 78234bc47c9SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 78334bc47c9SBenny Halevy 7846b140b85SBryan Schumaker #ifdef CONFIG_NFS_V4_2 7856b140b85SBryan Schumaker static __be32 7866b140b85SBryan Schumaker preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) 7876b140b85SBryan Schumaker { 7886b140b85SBryan Schumaker __be32 status = preprocess_nfs41_op(nop, op_nr, op); 7896b140b85SBryan Schumaker if (status != htonl(NFS4ERR_OP_ILLEGAL)) 7906b140b85SBryan Schumaker return status; 7916b140b85SBryan Schumaker 7926b140b85SBryan Schumaker if (op_nr == OP_CB_OFFLOAD) 7936b140b85SBryan Schumaker return htonl(NFS4ERR_NOTSUPP); 7946b140b85SBryan Schumaker return htonl(NFS4ERR_OP_ILLEGAL); 7956b140b85SBryan Schumaker } 7966b140b85SBryan Schumaker #else /* CONFIG_NFS_V4_2 */ 7976b140b85SBryan Schumaker static __be32 7986b140b85SBryan Schumaker preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) 7996b140b85SBryan Schumaker { 8006b140b85SBryan Schumaker return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 8016b140b85SBryan Schumaker } 8026b140b85SBryan Schumaker #endif /* CONFIG_NFS_V4_2 */ 8036b140b85SBryan Schumaker 80434bc47c9SBenny Halevy static __be32 80534bc47c9SBenny Halevy preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) 80634bc47c9SBenny Halevy { 80734bc47c9SBenny Halevy switch (op_nr) { 80834bc47c9SBenny Halevy case OP_CB_GETATTR: 80934bc47c9SBenny Halevy case OP_CB_RECALL: 81034bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 81134bc47c9SBenny Halevy break; 81234bc47c9SBenny Halevy default: 81334bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 81434bc47c9SBenny Halevy } 81534bc47c9SBenny Halevy 81634bc47c9SBenny Halevy return htonl(NFS_OK); 81734bc47c9SBenny Halevy } 81834bc47c9SBenny Halevy 819459de2edSBryan Schumaker static __be32 process_op(int nop, struct svc_rqst *rqstp, 8201da177e4SLinus Torvalds struct xdr_stream *xdr_in, void *argp, 821c36fca52SAndy Adamson struct xdr_stream *xdr_out, void *resp, 822c36fca52SAndy Adamson struct cb_process_state *cps) 8231da177e4SLinus Torvalds { 824a162a6b8STrond Myklebust struct callback_op *op = &callback_ops[0]; 82531d2b435SAndy Adamson unsigned int op_nr; 82634bc47c9SBenny Halevy __be32 status; 8271da177e4SLinus Torvalds long maxlen; 828e6f684f6SAl Viro __be32 res; 8291da177e4SLinus Torvalds 8303110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 8311da177e4SLinus Torvalds status = decode_op_hdr(xdr_in, &op_nr); 83231d2b435SAndy Adamson if (unlikely(status)) 83331d2b435SAndy Adamson return status; 8341da177e4SLinus Torvalds 83534bc47c9SBenny Halevy dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", 836459de2edSBryan Schumaker __func__, cps->minorversion, nop, op_nr); 83734bc47c9SBenny Halevy 8386b140b85SBryan Schumaker switch (cps->minorversion) { 8396b140b85SBryan Schumaker case 0: 8406b140b85SBryan Schumaker status = preprocess_nfs4_op(op_nr, &op); 8416b140b85SBryan Schumaker break; 8426b140b85SBryan Schumaker case 1: 8436b140b85SBryan Schumaker status = preprocess_nfs41_op(nop, op_nr, &op); 8446b140b85SBryan Schumaker break; 8456b140b85SBryan Schumaker case 2: 8466b140b85SBryan Schumaker status = preprocess_nfs42_op(nop, op_nr, &op); 8476b140b85SBryan Schumaker break; 8486b140b85SBryan Schumaker default: 8496b140b85SBryan Schumaker status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); 8506b140b85SBryan Schumaker } 8516b140b85SBryan Schumaker 85234bc47c9SBenny Halevy if (status == htonl(NFS4ERR_OP_ILLEGAL)) 85334bc47c9SBenny Halevy op_nr = OP_CB_ILLEGAL; 854b92b3019SAndy Adamson if (status) 855b92b3019SAndy Adamson goto encode_hdr; 85631d2b435SAndy Adamson 857c36fca52SAndy Adamson if (cps->drc_status) { 858c36fca52SAndy Adamson status = cps->drc_status; 8594911096fSAndy Adamson goto encode_hdr; 8604911096fSAndy Adamson } 8614911096fSAndy Adamson 8621da177e4SLinus Torvalds maxlen = xdr_out->end - xdr_out->p; 8631da177e4SLinus Torvalds if (maxlen > 0 && maxlen < PAGE_SIZE) { 8641da177e4SLinus Torvalds status = op->decode_args(rqstp, xdr_in, argp); 865e95e60daSAndy Adamson if (likely(status == 0)) 866c36fca52SAndy Adamson status = op->process_op(argp, resp, cps); 8671da177e4SLinus Torvalds } else 8681da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 8691da177e4SLinus Torvalds 870b92b3019SAndy Adamson encode_hdr: 8711da177e4SLinus Torvalds res = encode_op_hdr(xdr_out, op_nr, status); 87231d2b435SAndy Adamson if (unlikely(res)) 87331d2b435SAndy Adamson return res; 8741da177e4SLinus Torvalds if (op->encode_res != NULL && status == 0) 8751da177e4SLinus Torvalds status = op->encode_res(rqstp, xdr_out, resp); 8763110ff80SHarvey Harrison dprintk("%s: done, status = %d\n", __func__, ntohl(status)); 8771da177e4SLinus Torvalds return status; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds /* 8811da177e4SLinus Torvalds * Decode, process and encode a COMPOUND 8821da177e4SLinus Torvalds */ 8837111c66eSAl Viro static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) 8841da177e4SLinus Torvalds { 8853a6258e1STrond Myklebust struct cb_compound_hdr_arg hdr_arg = { 0 }; 8863a6258e1STrond Myklebust struct cb_compound_hdr_res hdr_res = { NULL }; 8871da177e4SLinus Torvalds struct xdr_stream xdr_in, xdr_out; 888c36fca52SAndy Adamson __be32 *p, status; 889c36fca52SAndy Adamson struct cb_process_state cps = { 890c36fca52SAndy Adamson .drc_status = 0, 891c36fca52SAndy Adamson .clp = NULL, 89245d43c29STrond Myklebust .slotid = NFS4_NO_SLOT, 8939695c705SStanislav Kinsbursky .net = SVC_NET(rqstp), 894c36fca52SAndy Adamson }; 8953a6258e1STrond Myklebust unsigned int nops = 0; 8961da177e4SLinus Torvalds 8973110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); 9001da177e4SLinus Torvalds 9015704fdebSAl Viro p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); 9021da177e4SLinus Torvalds xdr_init_encode(&xdr_out, &rqstp->rq_res, p); 9031da177e4SLinus Torvalds 9043a6258e1STrond Myklebust status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); 9054ed0d83dSVaishali Thakkar if (status == htonl(NFS4ERR_RESOURCE)) 9063a6258e1STrond Myklebust return rpc_garbage_args; 9073a6258e1STrond Myklebust 908c36fca52SAndy Adamson if (hdr_arg.minorversion == 0) { 9099695c705SStanislav Kinsbursky cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); 910778be232SAndy Adamson if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) 911c36fca52SAndy Adamson return rpc_drop_reply; 912778be232SAndy Adamson } 913c36fca52SAndy Adamson 914459de2edSBryan Schumaker cps.minorversion = hdr_arg.minorversion; 9151da177e4SLinus Torvalds hdr_res.taglen = hdr_arg.taglen; 9161da177e4SLinus Torvalds hdr_res.tag = hdr_arg.tag; 9173a6258e1STrond Myklebust if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) 9183a6258e1STrond Myklebust return rpc_system_err; 9191da177e4SLinus Torvalds 9203a6258e1STrond Myklebust while (status == 0 && nops != hdr_arg.nops) { 921459de2edSBryan Schumaker status = process_op(nops, rqstp, &xdr_in, 922459de2edSBryan Schumaker argp, &xdr_out, resp, &cps); 9231da177e4SLinus Torvalds nops++; 9241da177e4SLinus Torvalds } 9253a6258e1STrond Myklebust 92631d2b435SAndy Adamson /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return 92731d2b435SAndy Adamson * resource error in cb_compound status without returning op */ 92831d2b435SAndy Adamson if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { 92931d2b435SAndy Adamson status = htonl(NFS4ERR_RESOURCE); 93031d2b435SAndy Adamson nops--; 93131d2b435SAndy Adamson } 93231d2b435SAndy Adamson 9331da177e4SLinus Torvalds *hdr_res.status = status; 9341da177e4SLinus Torvalds *hdr_res.nops = htonl(nops); 93555a67399STrond Myklebust nfs4_cb_free_slot(&cps); 936c36fca52SAndy Adamson nfs_put_client(cps.clp); 9373110ff80SHarvey Harrison dprintk("%s: done, status = %u\n", __func__, ntohl(status)); 9381da177e4SLinus Torvalds return rpc_success; 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds /* 9421da177e4SLinus Torvalds * Define NFS4 callback COMPOUND ops. 9431da177e4SLinus Torvalds */ 9441da177e4SLinus Torvalds static struct callback_op callback_ops[] = { 9451da177e4SLinus Torvalds [0] = { 9461da177e4SLinus Torvalds .res_maxsize = CB_OP_HDR_RES_MAXSZ, 9471da177e4SLinus Torvalds }, 9481da177e4SLinus Torvalds [OP_CB_GETATTR] = { 9491da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_getattr, 9501da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_getattr_args, 9511da177e4SLinus Torvalds .encode_res = (callback_encode_res_t)encode_getattr_res, 9521da177e4SLinus Torvalds .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, 9531da177e4SLinus Torvalds }, 9541da177e4SLinus Torvalds [OP_CB_RECALL] = { 9551da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_recall, 9561da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_recall_args, 9571da177e4SLinus Torvalds .res_maxsize = CB_OP_RECALL_RES_MAXSZ, 9584aece6a1SBenny Halevy }, 9594aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 960f2a62561SFred Isaman [OP_CB_LAYOUTRECALL] = { 961f2a62561SFred Isaman .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, 962f2a62561SFred Isaman .decode_args = 963f2a62561SFred Isaman (callback_decode_arg_t)decode_layoutrecall_args, 964f2a62561SFred Isaman .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, 965f2a62561SFred Isaman }, 9661be5683bSMarc Eshel [OP_CB_NOTIFY_DEVICEID] = { 9671be5683bSMarc Eshel .process_op = (callback_process_op_t)nfs4_callback_devicenotify, 9681be5683bSMarc Eshel .decode_args = 9691be5683bSMarc Eshel (callback_decode_arg_t)decode_devicenotify_args, 9701be5683bSMarc Eshel .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, 9711be5683bSMarc Eshel }, 9724aece6a1SBenny Halevy [OP_CB_SEQUENCE] = { 9734aece6a1SBenny Halevy .process_op = (callback_process_op_t)nfs4_callback_sequence, 9744aece6a1SBenny Halevy .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, 9754aece6a1SBenny Halevy .encode_res = (callback_encode_res_t)encode_cb_sequence_res, 9764aece6a1SBenny Halevy .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, 9774aece6a1SBenny Halevy }, 97831f09607SAlexandros Batsakis [OP_CB_RECALL_ANY] = { 97931f09607SAlexandros Batsakis .process_op = (callback_process_op_t)nfs4_callback_recallany, 98031f09607SAlexandros Batsakis .decode_args = (callback_decode_arg_t)decode_recallany_args, 98131f09607SAlexandros Batsakis .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, 98231f09607SAlexandros Batsakis }, 983b9efa1b2SAndy Adamson [OP_CB_RECALL_SLOT] = { 984b9efa1b2SAndy Adamson .process_op = (callback_process_op_t)nfs4_callback_recallslot, 985b9efa1b2SAndy Adamson .decode_args = (callback_decode_arg_t)decode_recallslot_args, 986b9efa1b2SAndy Adamson .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, 987b9efa1b2SAndy Adamson }, 9884aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 9891da177e4SLinus Torvalds }; 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds /* 9921da177e4SLinus Torvalds * Define NFS4 callback procedures 9931da177e4SLinus Torvalds */ 9941da177e4SLinus Torvalds static struct svc_procedure nfs4_callback_procedures1[] = { 9951da177e4SLinus Torvalds [CB_NULL] = { 9961da177e4SLinus Torvalds .pc_func = nfs4_callback_null, 9971da177e4SLinus Torvalds .pc_decode = (kxdrproc_t)nfs4_decode_void, 9981da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 9991da177e4SLinus Torvalds .pc_xdrressize = 1, 10001da177e4SLinus Torvalds }, 10011da177e4SLinus Torvalds [CB_COMPOUND] = { 10021da177e4SLinus Torvalds .pc_func = nfs4_callback_compound, 10031da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 10041da177e4SLinus Torvalds .pc_argsize = 256, 10051da177e4SLinus Torvalds .pc_ressize = 256, 10061da177e4SLinus Torvalds .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds }; 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds struct svc_version nfs4_callback_version1 = { 10111da177e4SLinus Torvalds .vs_vers = 1, 10121da177e4SLinus Torvalds .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 10131da177e4SLinus Torvalds .vs_proc = nfs4_callback_procedures1, 10141da177e4SLinus Torvalds .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 10151da177e4SLinus Torvalds .vs_dispatch = NULL, 101649697ee7SSteve Dickson .vs_hidden = 1, 10171da177e4SLinus Torvalds }; 10181da177e4SLinus Torvalds 101907bccc2dSAlexandros Batsakis struct svc_version nfs4_callback_version4 = { 102007bccc2dSAlexandros Batsakis .vs_vers = 4, 102107bccc2dSAlexandros Batsakis .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 102207bccc2dSAlexandros Batsakis .vs_proc = nfs4_callback_procedures1, 102307bccc2dSAlexandros Batsakis .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 102407bccc2dSAlexandros Batsakis .vs_dispatch = NULL, 10256070295eSJeff Layton .vs_hidden = 1, 102607bccc2dSAlexandros Batsakis }; 1027