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> 125a0e3ad6STejun Heo #include <linux/slab.h> 13c36fca52SAndy Adamson #include <linux/sunrpc/bc_xprt.h> 144ce79717STrond Myklebust #include "nfs4_fs.h" 151da177e4SLinus Torvalds #include "callback.h" 16c36fca52SAndy Adamson #include "internal.h" 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds #define CB_OP_TAGLEN_MAXSZ (512) 191da177e4SLinus Torvalds #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) 201da177e4SLinus Torvalds #define CB_OP_GETATTR_BITMAP_MAXSZ (4) 211da177e4SLinus Torvalds #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 221da177e4SLinus Torvalds CB_OP_GETATTR_BITMAP_MAXSZ + \ 231da177e4SLinus Torvalds 2 + 2 + 3 + 3) 241da177e4SLinus Torvalds #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 251da177e4SLinus Torvalds 264aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 27f2a62561SFred Isaman #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 281be5683bSMarc Eshel #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 294aece6a1SBenny Halevy #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 304aece6a1SBenny Halevy 4 + 1 + 3) 3131f09607SAlexandros Batsakis #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 32b9efa1b2SAndy Adamson #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) 334aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 344aece6a1SBenny Halevy 351da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_CALLBACK 361da177e4SLinus Torvalds 3731d2b435SAndy Adamson /* Internal error code */ 3831d2b435SAndy Adamson #define NFS4ERR_RESOURCE_HDR 11050 3931d2b435SAndy Adamson 40c36fca52SAndy Adamson typedef __be32 (*callback_process_op_t)(void *, void *, 41c36fca52SAndy Adamson struct cb_process_state *); 42e6f684f6SAl Viro typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); 43e6f684f6SAl Viro typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds struct callback_op { 471da177e4SLinus Torvalds callback_process_op_t process_op; 481da177e4SLinus Torvalds callback_decode_arg_t decode_args; 491da177e4SLinus Torvalds callback_encode_res_t encode_res; 501da177e4SLinus Torvalds long res_maxsize; 511da177e4SLinus Torvalds }; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static struct callback_op callback_ops[]; 541da177e4SLinus Torvalds 557111c66eSAl Viro static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) 561da177e4SLinus Torvalds { 571da177e4SLinus Torvalds return htonl(NFS4_OK); 581da177e4SLinus Torvalds } 591da177e4SLinus Torvalds 605704fdebSAl Viro static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds return xdr_argsize_check(rqstp, p); 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds 655704fdebSAl Viro static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds return xdr_ressize_check(rqstp, p); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds 705704fdebSAl Viro static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) 711da177e4SLinus Torvalds { 725704fdebSAl Viro __be32 *p; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds p = xdr_inline_decode(xdr, nbytes); 751da177e4SLinus Torvalds if (unlikely(p == NULL)) 761da177e4SLinus Torvalds printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n"); 771da177e4SLinus Torvalds return p; 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds 80e6f684f6SAl Viro static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) 811da177e4SLinus Torvalds { 825704fdebSAl Viro __be32 *p; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds p = read_buf(xdr, 4); 851da177e4SLinus Torvalds if (unlikely(p == NULL)) 861da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 871da177e4SLinus Torvalds *len = ntohl(*p); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds if (*len != 0) { 901da177e4SLinus Torvalds p = read_buf(xdr, *len); 911da177e4SLinus Torvalds if (unlikely(p == NULL)) 921da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 931da177e4SLinus Torvalds *str = (const char *)p; 941da177e4SLinus Torvalds } else 951da177e4SLinus Torvalds *str = NULL; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds return 0; 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 100e6f684f6SAl Viro static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) 1011da177e4SLinus Torvalds { 1025704fdebSAl Viro __be32 *p; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds p = read_buf(xdr, 4); 1051da177e4SLinus Torvalds if (unlikely(p == NULL)) 1061da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1071da177e4SLinus Torvalds fh->size = ntohl(*p); 1081da177e4SLinus Torvalds if (fh->size > NFS4_FHSIZE) 1091da177e4SLinus Torvalds return htonl(NFS4ERR_BADHANDLE); 1101da177e4SLinus Torvalds p = read_buf(xdr, fh->size); 1111da177e4SLinus Torvalds if (unlikely(p == NULL)) 1121da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1131da177e4SLinus Torvalds memcpy(&fh->data[0], p, fh->size); 1141da177e4SLinus Torvalds memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); 1151da177e4SLinus Torvalds return 0; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 118e6f684f6SAl Viro static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) 1191da177e4SLinus Torvalds { 1205704fdebSAl Viro __be32 *p; 1211da177e4SLinus Torvalds unsigned int attrlen; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds p = read_buf(xdr, 4); 1241da177e4SLinus Torvalds if (unlikely(p == NULL)) 1251da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1261da177e4SLinus Torvalds attrlen = ntohl(*p); 1271da177e4SLinus Torvalds p = read_buf(xdr, attrlen << 2); 1281da177e4SLinus Torvalds if (unlikely(p == NULL)) 1291da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1301da177e4SLinus Torvalds if (likely(attrlen > 0)) 1311da177e4SLinus Torvalds bitmap[0] = ntohl(*p++); 1321da177e4SLinus Torvalds if (attrlen > 1) 1331da177e4SLinus Torvalds bitmap[1] = ntohl(*p); 1341da177e4SLinus Torvalds return 0; 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds 137e6f684f6SAl Viro static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 1381da177e4SLinus Torvalds { 1395704fdebSAl Viro __be32 *p; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds p = read_buf(xdr, 16); 1421da177e4SLinus Torvalds if (unlikely(p == NULL)) 1431da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1441da177e4SLinus Torvalds memcpy(stateid->data, p, 16); 1451da177e4SLinus Torvalds return 0; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 148e6f684f6SAl Viro static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) 1491da177e4SLinus Torvalds { 1505704fdebSAl Viro __be32 *p; 151e6f684f6SAl Viro __be32 status; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds status = decode_string(xdr, &hdr->taglen, &hdr->tag); 1541da177e4SLinus Torvalds if (unlikely(status != 0)) 1551da177e4SLinus Torvalds return status; 1561da177e4SLinus Torvalds /* We do not like overly long tags! */ 1575cce428dSChuck Lever if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { 1581da177e4SLinus Torvalds printk("NFSv4 CALLBACK %s: client sent tag of length %u\n", 1593110ff80SHarvey Harrison __func__, hdr->taglen); 1601da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds p = read_buf(xdr, 12); 1631da177e4SLinus Torvalds if (unlikely(p == NULL)) 1641da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 165b8f2ef84SBenny Halevy hdr->minorversion = ntohl(*p++); 16648a9e2d2SBenny Halevy /* Check minor version is zero or one. */ 16748a9e2d2SBenny Halevy if (hdr->minorversion <= 1) { 168c36fca52SAndy Adamson hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */ 16948a9e2d2SBenny Halevy } else { 170b8f2ef84SBenny Halevy printk(KERN_WARNING "%s: NFSv4 server callback with " 171b8f2ef84SBenny Halevy "illegal minor version %u!\n", 172b8f2ef84SBenny Halevy __func__, hdr->minorversion); 1731da177e4SLinus Torvalds return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds hdr->nops = ntohl(*p); 176b8f2ef84SBenny Halevy dprintk("%s: minorversion %d nops %d\n", __func__, 177b8f2ef84SBenny Halevy hdr->minorversion, hdr->nops); 1781da177e4SLinus Torvalds return 0; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 181e6f684f6SAl Viro static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) 1821da177e4SLinus Torvalds { 1835704fdebSAl Viro __be32 *p; 1841da177e4SLinus Torvalds p = read_buf(xdr, 4); 1851da177e4SLinus Torvalds if (unlikely(p == NULL)) 18631d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 1871da177e4SLinus Torvalds *op = ntohl(*p); 1881da177e4SLinus Torvalds return 0; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 191e6f684f6SAl Viro static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) 1921da177e4SLinus Torvalds { 193e6f684f6SAl Viro __be32 status; 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 1961da177e4SLinus Torvalds if (unlikely(status != 0)) 1971da177e4SLinus Torvalds goto out; 198671beed7SChuck Lever args->addr = svc_addr(rqstp); 1991da177e4SLinus Torvalds status = decode_bitmap(xdr, args->bitmap); 2001da177e4SLinus Torvalds out: 2013110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2021da177e4SLinus Torvalds return status; 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds 205e6f684f6SAl Viro static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) 2061da177e4SLinus Torvalds { 2075704fdebSAl Viro __be32 *p; 208e6f684f6SAl Viro __be32 status; 2091da177e4SLinus Torvalds 210c1d35866SChuck Lever args->addr = svc_addr(rqstp); 2111da177e4SLinus Torvalds status = decode_stateid(xdr, &args->stateid); 2121da177e4SLinus Torvalds if (unlikely(status != 0)) 2131da177e4SLinus Torvalds goto out; 2141da177e4SLinus Torvalds p = read_buf(xdr, 4); 2151da177e4SLinus Torvalds if (unlikely(p == NULL)) { 2161da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 2171da177e4SLinus Torvalds goto out; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds args->truncate = ntohl(*p); 2201da177e4SLinus Torvalds status = decode_fh(xdr, &args->fh); 2211da177e4SLinus Torvalds out: 2223110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 2233873bc50SAlexey Dobriyan return status; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 2264aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 2274aece6a1SBenny Halevy 228f2a62561SFred Isaman static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, 229f2a62561SFred Isaman struct xdr_stream *xdr, 230f2a62561SFred Isaman struct cb_layoutrecallargs *args) 231f2a62561SFred Isaman { 232f2a62561SFred Isaman __be32 *p; 233f2a62561SFred Isaman __be32 status = 0; 234f2a62561SFred Isaman uint32_t iomode; 235f2a62561SFred Isaman 236f2a62561SFred Isaman args->cbl_addr = svc_addr(rqstp); 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 3131be5683bSMarc Eshel args->devs = kmalloc(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 int len = NFS4_MAX_SESSIONID_LEN; 3844aece6a1SBenny Halevy 3854aece6a1SBenny Halevy p = read_buf(xdr, len); 3864aece6a1SBenny Halevy if (unlikely(p == NULL)) 387a419aef8SJoe Perches return htonl(NFS4ERR_RESOURCE); 3884aece6a1SBenny Halevy 3894aece6a1SBenny Halevy memcpy(sid->data, p, len); 3904aece6a1SBenny Halevy return 0; 3914aece6a1SBenny Halevy } 3924aece6a1SBenny Halevy 3939733f0d9SAndy Adamson static __be32 decode_rc_list(struct xdr_stream *xdr, 3944aece6a1SBenny Halevy struct referring_call_list *rc_list) 3954aece6a1SBenny Halevy { 3969733f0d9SAndy Adamson __be32 *p; 3974aece6a1SBenny Halevy int i; 3989733f0d9SAndy Adamson __be32 status; 3994aece6a1SBenny Halevy 4004aece6a1SBenny Halevy status = decode_sessionid(xdr, &rc_list->rcl_sessionid); 4014aece6a1SBenny Halevy if (status) 4024aece6a1SBenny Halevy goto out; 4034aece6a1SBenny Halevy 4044aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4054aece6a1SBenny Halevy p = read_buf(xdr, sizeof(uint32_t)); 4064aece6a1SBenny Halevy if (unlikely(p == NULL)) 4074aece6a1SBenny Halevy goto out; 4084aece6a1SBenny Halevy 4094aece6a1SBenny Halevy rc_list->rcl_nrefcalls = ntohl(*p++); 4104aece6a1SBenny Halevy if (rc_list->rcl_nrefcalls) { 4114aece6a1SBenny Halevy p = read_buf(xdr, 4124aece6a1SBenny Halevy rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); 4134aece6a1SBenny Halevy if (unlikely(p == NULL)) 4144aece6a1SBenny Halevy goto out; 4154aece6a1SBenny Halevy rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls * 4164aece6a1SBenny Halevy sizeof(*rc_list->rcl_refcalls), 4174aece6a1SBenny Halevy GFP_KERNEL); 4184aece6a1SBenny Halevy if (unlikely(rc_list->rcl_refcalls == NULL)) 4194aece6a1SBenny Halevy goto out; 4204aece6a1SBenny Halevy for (i = 0; i < rc_list->rcl_nrefcalls; i++) { 4214aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); 4224aece6a1SBenny Halevy rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); 4234aece6a1SBenny Halevy } 4244aece6a1SBenny Halevy } 4254aece6a1SBenny Halevy status = 0; 4264aece6a1SBenny Halevy 4274aece6a1SBenny Halevy out: 4284aece6a1SBenny Halevy return status; 4294aece6a1SBenny Halevy } 4304aece6a1SBenny Halevy 4319733f0d9SAndy Adamson static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, 4324aece6a1SBenny Halevy struct xdr_stream *xdr, 4334aece6a1SBenny Halevy struct cb_sequenceargs *args) 4344aece6a1SBenny Halevy { 4359733f0d9SAndy Adamson __be32 *p; 4364aece6a1SBenny Halevy int i; 4379733f0d9SAndy Adamson __be32 status; 4384aece6a1SBenny Halevy 4394aece6a1SBenny Halevy status = decode_sessionid(xdr, &args->csa_sessionid); 4404aece6a1SBenny Halevy if (status) 4414aece6a1SBenny Halevy goto out; 4424aece6a1SBenny Halevy 4434aece6a1SBenny Halevy status = htonl(NFS4ERR_RESOURCE); 4444aece6a1SBenny Halevy p = read_buf(xdr, 5 * sizeof(uint32_t)); 4454aece6a1SBenny Halevy if (unlikely(p == NULL)) 4464aece6a1SBenny Halevy goto out; 4474aece6a1SBenny Halevy 44865fc64e5SRicardo Labiaga args->csa_addr = svc_addr(rqstp); 4494aece6a1SBenny Halevy args->csa_sequenceid = ntohl(*p++); 4504aece6a1SBenny Halevy args->csa_slotid = ntohl(*p++); 4514aece6a1SBenny Halevy args->csa_highestslotid = ntohl(*p++); 4524aece6a1SBenny Halevy args->csa_cachethis = ntohl(*p++); 4534aece6a1SBenny Halevy args->csa_nrclists = ntohl(*p++); 4544aece6a1SBenny Halevy args->csa_rclists = NULL; 4554aece6a1SBenny Halevy if (args->csa_nrclists) { 4564aece6a1SBenny Halevy args->csa_rclists = kmalloc(args->csa_nrclists * 4574aece6a1SBenny Halevy sizeof(*args->csa_rclists), 4584aece6a1SBenny Halevy GFP_KERNEL); 4594aece6a1SBenny Halevy if (unlikely(args->csa_rclists == NULL)) 4604aece6a1SBenny Halevy goto out; 4614aece6a1SBenny Halevy 4624aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) { 4634aece6a1SBenny Halevy status = decode_rc_list(xdr, &args->csa_rclists[i]); 4644aece6a1SBenny Halevy if (status) 4654aece6a1SBenny Halevy goto out_free; 4664aece6a1SBenny Halevy } 4674aece6a1SBenny Halevy } 4684aece6a1SBenny Halevy status = 0; 4694aece6a1SBenny Halevy 4704aece6a1SBenny Halevy dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " 4714aece6a1SBenny Halevy "highestslotid %u cachethis %d nrclists %u\n", 4724aece6a1SBenny Halevy __func__, 4734aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[0], 4744aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[1], 4754aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[2], 4764aece6a1SBenny Halevy ((u32 *)&args->csa_sessionid)[3], 4774aece6a1SBenny Halevy args->csa_sequenceid, args->csa_slotid, 4784aece6a1SBenny Halevy args->csa_highestslotid, args->csa_cachethis, 4794aece6a1SBenny Halevy args->csa_nrclists); 4804aece6a1SBenny Halevy out: 4814aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 4824aece6a1SBenny Halevy return status; 4834aece6a1SBenny Halevy 4844aece6a1SBenny Halevy out_free: 4854aece6a1SBenny Halevy for (i = 0; i < args->csa_nrclists; i++) 4864aece6a1SBenny Halevy kfree(args->csa_rclists[i].rcl_refcalls); 4874aece6a1SBenny Halevy kfree(args->csa_rclists); 4884aece6a1SBenny Halevy goto out; 4894aece6a1SBenny Halevy } 4904aece6a1SBenny Halevy 4919733f0d9SAndy Adamson static __be32 decode_recallany_args(struct svc_rqst *rqstp, 49231f09607SAlexandros Batsakis struct xdr_stream *xdr, 49331f09607SAlexandros Batsakis struct cb_recallanyargs *args) 49431f09607SAlexandros Batsakis { 495d743c3c9SPeng Tao uint32_t bitmap[2]; 496d743c3c9SPeng Tao __be32 *p, status; 49731f09607SAlexandros Batsakis 49831f09607SAlexandros Batsakis args->craa_addr = svc_addr(rqstp); 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 args->crsa_addr = svc_addr(rqstp); 518b9efa1b2SAndy Adamson p = read_buf(xdr, 4); 519b9efa1b2SAndy Adamson if (unlikely(p == NULL)) 520b9efa1b2SAndy Adamson return htonl(NFS4ERR_BADXDR); 521b9efa1b2SAndy Adamson args->crsa_target_max_slots = ntohl(*p++); 522b9efa1b2SAndy Adamson return 0; 523b9efa1b2SAndy Adamson } 524b9efa1b2SAndy Adamson 5254aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 5264aece6a1SBenny Halevy 527e6f684f6SAl Viro static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) 5281da177e4SLinus Torvalds { 5295704fdebSAl Viro __be32 *p; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 4 + len); 5321da177e4SLinus Torvalds if (unlikely(p == NULL)) 5331da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5341da177e4SLinus Torvalds xdr_encode_opaque(p, str, len); 5351da177e4SLinus Torvalds return 0; 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) 5391da177e4SLinus Torvalds #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) 5405704fdebSAl Viro static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) 5411da177e4SLinus Torvalds { 5425704fdebSAl Viro __be32 bm[2]; 5435704fdebSAl Viro __be32 *p; 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); 5461da177e4SLinus Torvalds bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); 5471da177e4SLinus Torvalds if (bm[1] != 0) { 5481da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 16); 5491da177e4SLinus Torvalds if (unlikely(p == NULL)) 5501da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5511da177e4SLinus Torvalds *p++ = htonl(2); 5521da177e4SLinus Torvalds *p++ = bm[0]; 5531da177e4SLinus Torvalds *p++ = bm[1]; 5541da177e4SLinus Torvalds } else if (bm[0] != 0) { 5551da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 5561da177e4SLinus Torvalds if (unlikely(p == NULL)) 5571da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5581da177e4SLinus Torvalds *p++ = htonl(1); 5591da177e4SLinus Torvalds *p++ = bm[0]; 5601da177e4SLinus Torvalds } else { 5611da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 5621da177e4SLinus Torvalds if (unlikely(p == NULL)) 5631da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5641da177e4SLinus Torvalds *p++ = htonl(0); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds *savep = p; 5671da177e4SLinus Torvalds return 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 570e6f684f6SAl Viro static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) 5711da177e4SLinus Torvalds { 5725704fdebSAl Viro __be32 *p; 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) 5751da177e4SLinus Torvalds return 0; 5761da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 57790dc7d27SHarvey Harrison if (unlikely(!p)) 5781da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5791da177e4SLinus Torvalds p = xdr_encode_hyper(p, change); 5801da177e4SLinus Torvalds return 0; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds 583e6f684f6SAl Viro static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) 5841da177e4SLinus Torvalds { 5855704fdebSAl Viro __be32 *p; 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds if (!(bitmap[0] & FATTR4_WORD0_SIZE)) 5881da177e4SLinus Torvalds return 0; 5891da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 59090dc7d27SHarvey Harrison if (unlikely(!p)) 5911da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 5921da177e4SLinus Torvalds p = xdr_encode_hyper(p, size); 5931da177e4SLinus Torvalds return 0; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds 596e6f684f6SAl Viro static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) 5971da177e4SLinus Torvalds { 5985704fdebSAl Viro __be32 *p; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 12); 60190dc7d27SHarvey Harrison if (unlikely(!p)) 6021da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6031da177e4SLinus Torvalds p = xdr_encode_hyper(p, time->tv_sec); 6041da177e4SLinus Torvalds *p = htonl(time->tv_nsec); 6051da177e4SLinus Torvalds return 0; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 608e6f684f6SAl Viro static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6091da177e4SLinus Torvalds { 6101da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) 6111da177e4SLinus Torvalds return 0; 6121da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds 615e6f684f6SAl Viro static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) 6161da177e4SLinus Torvalds { 6171da177e4SLinus Torvalds if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) 6181da177e4SLinus Torvalds return 0; 6191da177e4SLinus Torvalds return encode_attr_time(xdr,time); 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds 622e6f684f6SAl Viro static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) 6231da177e4SLinus Torvalds { 624e6f684f6SAl Viro __be32 status; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds hdr->status = xdr_reserve_space(xdr, 4); 6271da177e4SLinus Torvalds if (unlikely(hdr->status == NULL)) 6281da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6291da177e4SLinus Torvalds status = encode_string(xdr, hdr->taglen, hdr->tag); 6301da177e4SLinus Torvalds if (unlikely(status != 0)) 6311da177e4SLinus Torvalds return status; 6321da177e4SLinus Torvalds hdr->nops = xdr_reserve_space(xdr, 4); 6331da177e4SLinus Torvalds if (unlikely(hdr->nops == NULL)) 6341da177e4SLinus Torvalds return htonl(NFS4ERR_RESOURCE); 6351da177e4SLinus Torvalds return 0; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 638e6f684f6SAl Viro static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) 6391da177e4SLinus Torvalds { 6405704fdebSAl Viro __be32 *p; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds p = xdr_reserve_space(xdr, 8); 6431da177e4SLinus Torvalds if (unlikely(p == NULL)) 64431d2b435SAndy Adamson return htonl(NFS4ERR_RESOURCE_HDR); 6451da177e4SLinus Torvalds *p++ = htonl(op); 6461da177e4SLinus Torvalds *p = res; 6471da177e4SLinus Torvalds return 0; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 650e6f684f6SAl Viro static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) 6511da177e4SLinus Torvalds { 6525704fdebSAl Viro __be32 *savep = NULL; 653e6f684f6SAl Viro __be32 status = res->status; 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds if (unlikely(status != 0)) 6561da177e4SLinus Torvalds goto out; 6571da177e4SLinus Torvalds status = encode_attr_bitmap(xdr, res->bitmap, &savep); 6581da177e4SLinus Torvalds if (unlikely(status != 0)) 6591da177e4SLinus Torvalds goto out; 6601da177e4SLinus Torvalds status = encode_attr_change(xdr, res->bitmap, res->change_attr); 6611da177e4SLinus Torvalds if (unlikely(status != 0)) 6621da177e4SLinus Torvalds goto out; 6631da177e4SLinus Torvalds status = encode_attr_size(xdr, res->bitmap, res->size); 6641da177e4SLinus Torvalds if (unlikely(status != 0)) 6651da177e4SLinus Torvalds goto out; 6661da177e4SLinus Torvalds status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); 6671da177e4SLinus Torvalds if (unlikely(status != 0)) 6681da177e4SLinus Torvalds goto out; 6691da177e4SLinus Torvalds status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); 6701da177e4SLinus Torvalds *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); 6711da177e4SLinus Torvalds out: 6723110ff80SHarvey Harrison dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 6731da177e4SLinus Torvalds return status; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 67634bc47c9SBenny Halevy #if defined(CONFIG_NFS_V4_1) 67734bc47c9SBenny Halevy 6789733f0d9SAndy Adamson static __be32 encode_sessionid(struct xdr_stream *xdr, 6794aece6a1SBenny Halevy const struct nfs4_sessionid *sid) 6804aece6a1SBenny Halevy { 6819733f0d9SAndy Adamson __be32 *p; 6824aece6a1SBenny Halevy int len = NFS4_MAX_SESSIONID_LEN; 6834aece6a1SBenny Halevy 6844aece6a1SBenny Halevy p = xdr_reserve_space(xdr, len); 6854aece6a1SBenny Halevy if (unlikely(p == NULL)) 6864aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 6874aece6a1SBenny Halevy 6884aece6a1SBenny Halevy memcpy(p, sid, len); 6894aece6a1SBenny Halevy return 0; 6904aece6a1SBenny Halevy } 6914aece6a1SBenny Halevy 6929733f0d9SAndy Adamson static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, 6934aece6a1SBenny Halevy struct xdr_stream *xdr, 6944aece6a1SBenny Halevy const struct cb_sequenceres *res) 6954aece6a1SBenny Halevy { 6969733f0d9SAndy Adamson __be32 *p; 6974aece6a1SBenny Halevy unsigned status = res->csr_status; 6984aece6a1SBenny Halevy 6994aece6a1SBenny Halevy if (unlikely(status != 0)) 7004aece6a1SBenny Halevy goto out; 7014aece6a1SBenny Halevy 7024aece6a1SBenny Halevy encode_sessionid(xdr, &res->csr_sessionid); 7034aece6a1SBenny Halevy 7044aece6a1SBenny Halevy p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); 7054aece6a1SBenny Halevy if (unlikely(p == NULL)) 7064aece6a1SBenny Halevy return htonl(NFS4ERR_RESOURCE); 7074aece6a1SBenny Halevy 7084aece6a1SBenny Halevy *p++ = htonl(res->csr_sequenceid); 7094aece6a1SBenny Halevy *p++ = htonl(res->csr_slotid); 7104aece6a1SBenny Halevy *p++ = htonl(res->csr_highestslotid); 7114aece6a1SBenny Halevy *p++ = htonl(res->csr_target_highestslotid); 7124aece6a1SBenny Halevy out: 7134aece6a1SBenny Halevy dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 7144aece6a1SBenny Halevy return status; 7154aece6a1SBenny Halevy } 7164aece6a1SBenny Halevy 71734bc47c9SBenny Halevy static __be32 71834bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 71934bc47c9SBenny Halevy { 720281fe15dSBenny Halevy if (op_nr == OP_CB_SEQUENCE) { 721281fe15dSBenny Halevy if (nop != 0) 722281fe15dSBenny Halevy return htonl(NFS4ERR_SEQUENCE_POS); 723281fe15dSBenny Halevy } else { 724281fe15dSBenny Halevy if (nop == 0) 725281fe15dSBenny Halevy return htonl(NFS4ERR_OP_NOT_IN_SESSION); 726281fe15dSBenny Halevy } 727281fe15dSBenny Halevy 72834bc47c9SBenny Halevy switch (op_nr) { 72934bc47c9SBenny Halevy case OP_CB_GETATTR: 73034bc47c9SBenny Halevy case OP_CB_RECALL: 7314aece6a1SBenny Halevy case OP_CB_SEQUENCE: 73231f09607SAlexandros Batsakis case OP_CB_RECALL_ANY: 733b9efa1b2SAndy Adamson case OP_CB_RECALL_SLOT: 734f2a62561SFred Isaman case OP_CB_LAYOUTRECALL: 7351be5683bSMarc Eshel case OP_CB_NOTIFY_DEVICEID: 73634bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 73734bc47c9SBenny Halevy break; 73834bc47c9SBenny Halevy 73934bc47c9SBenny Halevy case OP_CB_NOTIFY: 74034bc47c9SBenny Halevy case OP_CB_PUSH_DELEG: 74134bc47c9SBenny Halevy case OP_CB_RECALLABLE_OBJ_AVAIL: 74234bc47c9SBenny Halevy case OP_CB_WANTS_CANCELLED: 74334bc47c9SBenny Halevy case OP_CB_NOTIFY_LOCK: 74434bc47c9SBenny Halevy return htonl(NFS4ERR_NOTSUPP); 74534bc47c9SBenny Halevy 74634bc47c9SBenny Halevy default: 74734bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 74834bc47c9SBenny Halevy } 74934bc47c9SBenny Halevy 75034bc47c9SBenny Halevy return htonl(NFS_OK); 75134bc47c9SBenny Halevy } 75234bc47c9SBenny Halevy 75342acd021SAndy Adamson static void nfs4_callback_free_slot(struct nfs4_session *session) 75442acd021SAndy Adamson { 75542acd021SAndy Adamson struct nfs4_slot_table *tbl = &session->bc_slot_table; 75642acd021SAndy Adamson 75742acd021SAndy Adamson spin_lock(&tbl->slot_tbl_lock); 75842acd021SAndy Adamson /* 75942acd021SAndy Adamson * Let the state manager know callback processing done. 76042acd021SAndy Adamson * A single slot, so highest used slotid is either 0 or -1 76142acd021SAndy Adamson */ 76255a67399STrond Myklebust tbl->highest_used_slotid = -1; 76342acd021SAndy Adamson nfs4_check_drain_bc_complete(session); 76442acd021SAndy Adamson spin_unlock(&tbl->slot_tbl_lock); 76542acd021SAndy Adamson } 76642acd021SAndy Adamson 76755a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 76842acd021SAndy Adamson { 76955a67399STrond Myklebust if (cps->slotid != -1) 77055a67399STrond Myklebust nfs4_callback_free_slot(cps->clp->cl_session); 77142acd021SAndy Adamson } 77242acd021SAndy Adamson 77334bc47c9SBenny Halevy #else /* CONFIG_NFS_V4_1 */ 77434bc47c9SBenny Halevy 77534bc47c9SBenny Halevy static __be32 77634bc47c9SBenny Halevy preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) 77734bc47c9SBenny Halevy { 77834bc47c9SBenny Halevy return htonl(NFS4ERR_MINOR_VERS_MISMATCH); 77934bc47c9SBenny Halevy } 78034bc47c9SBenny Halevy 78155a67399STrond Myklebust static void nfs4_cb_free_slot(struct cb_process_state *cps) 78242acd021SAndy Adamson { 78342acd021SAndy Adamson } 78434bc47c9SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 78534bc47c9SBenny Halevy 78634bc47c9SBenny Halevy static __be32 78734bc47c9SBenny Halevy preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) 78834bc47c9SBenny Halevy { 78934bc47c9SBenny Halevy switch (op_nr) { 79034bc47c9SBenny Halevy case OP_CB_GETATTR: 79134bc47c9SBenny Halevy case OP_CB_RECALL: 79234bc47c9SBenny Halevy *op = &callback_ops[op_nr]; 79334bc47c9SBenny Halevy break; 79434bc47c9SBenny Halevy default: 79534bc47c9SBenny Halevy return htonl(NFS4ERR_OP_ILLEGAL); 79634bc47c9SBenny Halevy } 79734bc47c9SBenny Halevy 79834bc47c9SBenny Halevy return htonl(NFS_OK); 79934bc47c9SBenny Halevy } 80034bc47c9SBenny Halevy 80134bc47c9SBenny Halevy static __be32 process_op(uint32_t minorversion, int nop, 80234bc47c9SBenny Halevy struct svc_rqst *rqstp, 8031da177e4SLinus Torvalds struct xdr_stream *xdr_in, void *argp, 804c36fca52SAndy Adamson struct xdr_stream *xdr_out, void *resp, 805c36fca52SAndy Adamson struct cb_process_state *cps) 8061da177e4SLinus Torvalds { 807a162a6b8STrond Myklebust struct callback_op *op = &callback_ops[0]; 80831d2b435SAndy Adamson unsigned int op_nr; 80934bc47c9SBenny Halevy __be32 status; 8101da177e4SLinus Torvalds long maxlen; 811e6f684f6SAl Viro __be32 res; 8121da177e4SLinus Torvalds 8133110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 8141da177e4SLinus Torvalds status = decode_op_hdr(xdr_in, &op_nr); 81531d2b435SAndy Adamson if (unlikely(status)) 81631d2b435SAndy Adamson return status; 8171da177e4SLinus Torvalds 81834bc47c9SBenny Halevy dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", 81934bc47c9SBenny Halevy __func__, minorversion, nop, op_nr); 82034bc47c9SBenny Halevy 82134bc47c9SBenny Halevy status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) : 82234bc47c9SBenny Halevy preprocess_nfs4_op(op_nr, &op); 82334bc47c9SBenny Halevy if (status == htonl(NFS4ERR_OP_ILLEGAL)) 82434bc47c9SBenny Halevy op_nr = OP_CB_ILLEGAL; 825b92b3019SAndy Adamson if (status) 826b92b3019SAndy Adamson goto encode_hdr; 82731d2b435SAndy Adamson 828c36fca52SAndy Adamson if (cps->drc_status) { 829c36fca52SAndy Adamson status = cps->drc_status; 8304911096fSAndy Adamson goto encode_hdr; 8314911096fSAndy Adamson } 8324911096fSAndy Adamson 8331da177e4SLinus Torvalds maxlen = xdr_out->end - xdr_out->p; 8341da177e4SLinus Torvalds if (maxlen > 0 && maxlen < PAGE_SIZE) { 8351da177e4SLinus Torvalds status = op->decode_args(rqstp, xdr_in, argp); 836e95e60daSAndy Adamson if (likely(status == 0)) 837c36fca52SAndy Adamson status = op->process_op(argp, resp, cps); 8381da177e4SLinus Torvalds } else 8391da177e4SLinus Torvalds status = htonl(NFS4ERR_RESOURCE); 8401da177e4SLinus Torvalds 841b92b3019SAndy Adamson encode_hdr: 8421da177e4SLinus Torvalds res = encode_op_hdr(xdr_out, op_nr, status); 84331d2b435SAndy Adamson if (unlikely(res)) 84431d2b435SAndy Adamson return res; 8451da177e4SLinus Torvalds if (op->encode_res != NULL && status == 0) 8461da177e4SLinus Torvalds status = op->encode_res(rqstp, xdr_out, resp); 8473110ff80SHarvey Harrison dprintk("%s: done, status = %d\n", __func__, ntohl(status)); 8481da177e4SLinus Torvalds return status; 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds /* 8521da177e4SLinus Torvalds * Decode, process and encode a COMPOUND 8531da177e4SLinus Torvalds */ 8547111c66eSAl Viro static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) 8551da177e4SLinus Torvalds { 8563a6258e1STrond Myklebust struct cb_compound_hdr_arg hdr_arg = { 0 }; 8573a6258e1STrond Myklebust struct cb_compound_hdr_res hdr_res = { NULL }; 8581da177e4SLinus Torvalds struct xdr_stream xdr_in, xdr_out; 859c36fca52SAndy Adamson __be32 *p, status; 860c36fca52SAndy Adamson struct cb_process_state cps = { 861c36fca52SAndy Adamson .drc_status = 0, 862c36fca52SAndy Adamson .clp = NULL, 86355a67399STrond Myklebust .slotid = -1, 864c36fca52SAndy Adamson }; 8653a6258e1STrond Myklebust unsigned int nops = 0; 8661da177e4SLinus Torvalds 8673110ff80SHarvey Harrison dprintk("%s: start\n", __func__); 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); 8701da177e4SLinus Torvalds 8715704fdebSAl Viro p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); 8721da177e4SLinus Torvalds xdr_init_encode(&xdr_out, &rqstp->rq_res, p); 8731da177e4SLinus Torvalds 8743a6258e1STrond Myklebust status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); 8753a6258e1STrond Myklebust if (status == __constant_htonl(NFS4ERR_RESOURCE)) 8763a6258e1STrond Myklebust return rpc_garbage_args; 8773a6258e1STrond Myklebust 878c36fca52SAndy Adamson if (hdr_arg.minorversion == 0) { 879c36fca52SAndy Adamson cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident); 880778be232SAndy Adamson if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) 881c36fca52SAndy Adamson return rpc_drop_reply; 882778be232SAndy Adamson } 883c36fca52SAndy Adamson 8841da177e4SLinus Torvalds hdr_res.taglen = hdr_arg.taglen; 8851da177e4SLinus Torvalds hdr_res.tag = hdr_arg.tag; 8863a6258e1STrond Myklebust if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) 8873a6258e1STrond Myklebust return rpc_system_err; 8881da177e4SLinus Torvalds 8893a6258e1STrond Myklebust while (status == 0 && nops != hdr_arg.nops) { 8904911096fSAndy Adamson status = process_op(hdr_arg.minorversion, nops, rqstp, 891c36fca52SAndy Adamson &xdr_in, argp, &xdr_out, resp, &cps); 8921da177e4SLinus Torvalds nops++; 8931da177e4SLinus Torvalds } 8943a6258e1STrond Myklebust 89531d2b435SAndy Adamson /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return 89631d2b435SAndy Adamson * resource error in cb_compound status without returning op */ 89731d2b435SAndy Adamson if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { 89831d2b435SAndy Adamson status = htonl(NFS4ERR_RESOURCE); 89931d2b435SAndy Adamson nops--; 90031d2b435SAndy Adamson } 90131d2b435SAndy Adamson 9021da177e4SLinus Torvalds *hdr_res.status = status; 9031da177e4SLinus Torvalds *hdr_res.nops = htonl(nops); 90455a67399STrond Myklebust nfs4_cb_free_slot(&cps); 905c36fca52SAndy Adamson nfs_put_client(cps.clp); 9063110ff80SHarvey Harrison dprintk("%s: done, status = %u\n", __func__, ntohl(status)); 9071da177e4SLinus Torvalds return rpc_success; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds /* 9111da177e4SLinus Torvalds * Define NFS4 callback COMPOUND ops. 9121da177e4SLinus Torvalds */ 9131da177e4SLinus Torvalds static struct callback_op callback_ops[] = { 9141da177e4SLinus Torvalds [0] = { 9151da177e4SLinus Torvalds .res_maxsize = CB_OP_HDR_RES_MAXSZ, 9161da177e4SLinus Torvalds }, 9171da177e4SLinus Torvalds [OP_CB_GETATTR] = { 9181da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_getattr, 9191da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_getattr_args, 9201da177e4SLinus Torvalds .encode_res = (callback_encode_res_t)encode_getattr_res, 9211da177e4SLinus Torvalds .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, 9221da177e4SLinus Torvalds }, 9231da177e4SLinus Torvalds [OP_CB_RECALL] = { 9241da177e4SLinus Torvalds .process_op = (callback_process_op_t)nfs4_callback_recall, 9251da177e4SLinus Torvalds .decode_args = (callback_decode_arg_t)decode_recall_args, 9261da177e4SLinus Torvalds .res_maxsize = CB_OP_RECALL_RES_MAXSZ, 9274aece6a1SBenny Halevy }, 9284aece6a1SBenny Halevy #if defined(CONFIG_NFS_V4_1) 929f2a62561SFred Isaman [OP_CB_LAYOUTRECALL] = { 930f2a62561SFred Isaman .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, 931f2a62561SFred Isaman .decode_args = 932f2a62561SFred Isaman (callback_decode_arg_t)decode_layoutrecall_args, 933f2a62561SFred Isaman .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, 934f2a62561SFred Isaman }, 9351be5683bSMarc Eshel [OP_CB_NOTIFY_DEVICEID] = { 9361be5683bSMarc Eshel .process_op = (callback_process_op_t)nfs4_callback_devicenotify, 9371be5683bSMarc Eshel .decode_args = 9381be5683bSMarc Eshel (callback_decode_arg_t)decode_devicenotify_args, 9391be5683bSMarc Eshel .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, 9401be5683bSMarc Eshel }, 9414aece6a1SBenny Halevy [OP_CB_SEQUENCE] = { 9424aece6a1SBenny Halevy .process_op = (callback_process_op_t)nfs4_callback_sequence, 9434aece6a1SBenny Halevy .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, 9444aece6a1SBenny Halevy .encode_res = (callback_encode_res_t)encode_cb_sequence_res, 9454aece6a1SBenny Halevy .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, 9464aece6a1SBenny Halevy }, 94731f09607SAlexandros Batsakis [OP_CB_RECALL_ANY] = { 94831f09607SAlexandros Batsakis .process_op = (callback_process_op_t)nfs4_callback_recallany, 94931f09607SAlexandros Batsakis .decode_args = (callback_decode_arg_t)decode_recallany_args, 95031f09607SAlexandros Batsakis .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, 95131f09607SAlexandros Batsakis }, 952b9efa1b2SAndy Adamson [OP_CB_RECALL_SLOT] = { 953b9efa1b2SAndy Adamson .process_op = (callback_process_op_t)nfs4_callback_recallslot, 954b9efa1b2SAndy Adamson .decode_args = (callback_decode_arg_t)decode_recallslot_args, 955b9efa1b2SAndy Adamson .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, 956b9efa1b2SAndy Adamson }, 9574aece6a1SBenny Halevy #endif /* CONFIG_NFS_V4_1 */ 9581da177e4SLinus Torvalds }; 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds /* 9611da177e4SLinus Torvalds * Define NFS4 callback procedures 9621da177e4SLinus Torvalds */ 9631da177e4SLinus Torvalds static struct svc_procedure nfs4_callback_procedures1[] = { 9641da177e4SLinus Torvalds [CB_NULL] = { 9651da177e4SLinus Torvalds .pc_func = nfs4_callback_null, 9661da177e4SLinus Torvalds .pc_decode = (kxdrproc_t)nfs4_decode_void, 9671da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 9681da177e4SLinus Torvalds .pc_xdrressize = 1, 9691da177e4SLinus Torvalds }, 9701da177e4SLinus Torvalds [CB_COMPOUND] = { 9711da177e4SLinus Torvalds .pc_func = nfs4_callback_compound, 9721da177e4SLinus Torvalds .pc_encode = (kxdrproc_t)nfs4_encode_void, 9731da177e4SLinus Torvalds .pc_argsize = 256, 9741da177e4SLinus Torvalds .pc_ressize = 256, 9751da177e4SLinus Torvalds .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds }; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds struct svc_version nfs4_callback_version1 = { 9801da177e4SLinus Torvalds .vs_vers = 1, 9811da177e4SLinus Torvalds .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 9821da177e4SLinus Torvalds .vs_proc = nfs4_callback_procedures1, 9831da177e4SLinus Torvalds .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 9841da177e4SLinus Torvalds .vs_dispatch = NULL, 98549697ee7SSteve Dickson .vs_hidden = 1, 9861da177e4SLinus Torvalds }; 9871da177e4SLinus Torvalds 98807bccc2dSAlexandros Batsakis struct svc_version nfs4_callback_version4 = { 98907bccc2dSAlexandros Batsakis .vs_vers = 4, 99007bccc2dSAlexandros Batsakis .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), 99107bccc2dSAlexandros Batsakis .vs_proc = nfs4_callback_procedures1, 99207bccc2dSAlexandros Batsakis .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, 99307bccc2dSAlexandros Batsakis .vs_dispatch = NULL, 9946070295eSJeff Layton .vs_hidden = 1, 99507bccc2dSAlexandros Batsakis }; 996