/* * fs/nfs/nfs4xdr.c * * Client-side XDR for NFSv4. * * Copyright (c) 2002 The Regents of the University of Michigan. * All rights reserved. * * Kendrick Smith <kmsmith@umich.edu> * Andy Adamson <andros@umich.edu> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <linux/param.h> #include <linux/time.h> #include <linux/mm.h> #include <linux/slab.h> #include <linux/utsname.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/in.h> #include <linux/pagemap.h> #include <linux/proc_fs.h> #include <linux/kdev_t.h> #include <linux/sunrpc/clnt.h> #include <linux/nfs.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> /* Emperically, it seems that the NFS client gets confused if * cookies larger than this are returned -- presumably a * signedness issue? */ #define COOKIE_MAX 0x7fffffff #define NFSDBG_FACILITY NFSDBG_XDR /* Mapping from NFS error code to "errno" error code. */ #define errno_NFSERR_IO EIO extern int nfs_stat_to_errno(int); #define NFS4_enc_compound_sz 1024 /* XXX: large enough? */ #define NFS4_dec_compound_sz 1024 /* XXX: large enough? */ static struct { unsigned int mode; unsigned int nfs2type; } nfs_type2fmt[] = { { 0, NFNON }, { S_IFREG, NFREG }, { S_IFDIR, NFDIR }, { S_IFBLK, NFBLK }, { S_IFCHR, NFCHR }, { S_IFLNK, NFLNK }, { S_IFSOCK, NFSOCK }, { S_IFIFO, NFFIFO }, { 0, NFNON }, { 0, NFNON }, }; struct compound_hdr { int32_t status; uint32_t nops; uint32_t taglen; char * tag; }; /* * START OF "GENERIC" ENCODE ROUTINES. * These may look a little ugly since they are imported from a "generic" * set of XDR encode/decode routines which are intended to be shared by * all of our NFSv4 implementations (OpenBSD, MacOS X...). * * If the pain of reading these is too great, it should be a straightforward * task to translate them into Linux-specific versions which are more * consistent with the style used in NFSv2/v3... */ #define WRITE32(n) *p++ = htonl(n) #define WRITE64(n) do { \ *p++ = htonl((uint32_t)((n) >> 32)); \ *p++ = htonl((uint32_t)(n)); \ } while (0) #define WRITEMEM(ptr,nbytes) do { \ p = xdr_writemem(p, ptr, nbytes); \ } while (0) #define RESERVE_SPACE(nbytes) do { \ p = xdr_reserve_space(xdr, nbytes); \ BUG_ON(!p); \ } while (0) static inline uint32_t *xdr_writemem(uint32_t *p, const void *ptr, int nbytes) { int tmp = XDR_QUADLEN(nbytes); if (!tmp) return p; p[tmp-1] = 0; memcpy(p, ptr, nbytes); return p + tmp; } static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) { uint32_t *p; dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag); RESERVE_SPACE(12+XDR_QUADLEN(hdr->taglen)); WRITE32(hdr->taglen); WRITEMEM(hdr->tag, hdr->taglen); WRITE32(NFS4_MINOR_VERSION); WRITE32(hdr->nops); return 0; } /* * FIXME: The following dummy entries will be replaced once the userland * upcall gets in... */ static int encode_uid(char *p, uid_t uid) { strcpy(p, "nobody"); return 6; } /* * FIXME: The following dummy entries will be replaced once the userland * upcall gets in... */ static int encode_gid(char *p, gid_t gid) { strcpy(p, "nobody"); return 6; } static int encode_attrs(struct xdr_stream *xdr, struct iattr *iap) { char owner_name[256]; char owner_group[256]; int owner_namelen = 0; int owner_grouplen = 0; uint32_t *p; uint32_t *q; int len; uint32_t bmval0 = 0; uint32_t bmval1 = 0; int status; /* * We reserve enough space to write the entire attribute buffer at once. * In the worst-case, this would be * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime) * = 36 bytes, plus any contribution from variable-length fields * such as owner/group/acl's. */ len = 16; /* Sigh */ if (iap->ia_valid & ATTR_SIZE) len += 8; if (iap->ia_valid & ATTR_MODE) len += 4; if (iap->ia_valid & ATTR_UID) { status = owner_namelen = encode_uid(owner_name, iap->ia_uid); if (status < 0) { printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n", iap->ia_uid); goto out; } len += 4 + (XDR_QUADLEN(owner_namelen) << 2); } if (iap->ia_valid & ATTR_GID) { status = owner_grouplen = encode_gid(owner_group, iap->ia_gid); if (status < 0) { printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n", iap->ia_gid); goto out; } len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); } if (iap->ia_valid & ATTR_ATIME_SET) len += 16; else if (iap->ia_valid & ATTR_ATIME) len += 4; if (iap->ia_valid & ATTR_MTIME_SET) len += 16; else if (iap->ia_valid & ATTR_MTIME) len += 4; RESERVE_SPACE(len); /* * We write the bitmap length now, but leave the bitmap and the attribute * buffer length to be backfilled at the end of this routine. */ WRITE32(2); q = p; p += 3; if (iap->ia_valid & ATTR_SIZE) { bmval0 |= FATTR4_WORD0_SIZE; WRITE64(iap->ia_size); } if (iap->ia_valid & ATTR_MODE) { bmval1 |= FATTR4_WORD1_MODE; WRITE32(iap->ia_mode); } if (iap->ia_valid & ATTR_UID) { bmval1 |= FATTR4_WORD1_OWNER; WRITE32(owner_namelen); WRITEMEM(owner_name, owner_namelen); } if (iap->ia_valid & ATTR_GID) { bmval1 |= FATTR4_WORD1_OWNER_GROUP; WRITE32(owner_grouplen); WRITEMEM(owner_group, owner_grouplen); } if (iap->ia_valid & ATTR_ATIME_SET) { bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; WRITE32(NFS4_SET_TO_CLIENT_TIME); WRITE32(0); WRITE32(iap->ia_mtime.tv_sec); WRITE32(iap->ia_mtime.tv_nsec); } else if (iap->ia_valid & ATTR_ATIME) { bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; WRITE32(NFS4_SET_TO_SERVER_TIME); } if (iap->ia_valid & ATTR_MTIME_SET) { bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; WRITE32(NFS4_SET_TO_CLIENT_TIME); WRITE32(0); WRITE32(iap->ia_mtime.tv_sec); WRITE32(iap->ia_mtime.tv_nsec); } else if (iap->ia_valid & ATTR_MTIME) { bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; WRITE32(NFS4_SET_TO_SERVER_TIME); } /* * Now we backfill the bitmap and the attribute buffer length. */ if (len != ((char *)p - (char *)q) + 4) { printk ("encode_attr: Attr length calculation error! %u != %u\n", len, ((char *)p - (char *)q) + 4); BUG(); } len = (char *)p - (char *)q - 12; *q++ = htonl(bmval0); *q++ = htonl(bmval1); *q++ = htonl(len); status = 0; out: return status; } static int encode_access(struct xdr_stream *xdr, struct nfs4_access *access) { uint32_t *p; RESERVE_SPACE(8); WRITE32(OP_ACCESS); WRITE32(access->ac_req_access); return 0; } static int encode_close(struct xdr_stream *xdr, struct nfs4_close *close) { uint32_t *p; RESERVE_SPACE(8+sizeof(nfs4_stateid)); WRITE32(OP_CLOSE); WRITE32(close->cl_seqid); WRITEMEM(close->cl_stateid, sizeof(nfs4_stateid)); return 0; } static int encode_commit(struct xdr_stream *xdr, struct nfs4_commit *commit) { uint32_t *p; RESERVE_SPACE(16); WRITE32(OP_COMMIT); WRITE64(commit->co_start); WRITE32(commit->co_len); return 0; } static int encode_create(struct xdr_stream *xdr, struct nfs4_create *create) { uint32_t *p; RESERVE_SPACE(8); WRITE32(OP_CREATE); WRITE32(create->cr_ftype); switch (create->cr_ftype) { case NF4LNK: RESERVE_SPACE(4 + create->cr_textlen); WRITE32(create->cr_textlen); WRITEMEM(create->cr_text, create->cr_textlen); break; case NF4BLK: case NF4CHR: RESERVE_SPACE(8); WRITE32(create->cr_specdata1); WRITE32(create->cr_specdata2); break; default: break; } RESERVE_SPACE(4 + create->cr_namelen); WRITE32(create->cr_namelen); WRITEMEM(create->cr_name, create->cr_namelen); return encode_attrs(xdr, create->cr_attrs); } static int encode_getattr(struct xdr_stream *xdr, struct nfs4_getattr *getattr) { uint32_t *p; RESERVE_SPACE(16); WRITE32(OP_GETATTR); WRITE32(2); WRITE32(getattr->gt_bmval[0]); WRITE32(getattr->gt_bmval[1]); return 0; } static int encode_getfh(struct xdr_stream *xdr) { uint32_t *p; RESERVE_SPACE(4); WRITE32(OP_GETFH); return 0; } static int encode_link(struct xdr_stream *xdr, struct nfs4_link *link) { uint32_t *p; RESERVE_SPACE(8 + link->ln_namelen); WRITE32(OP_LINK); WRITE32(link->ln_namelen); WRITEMEM(link->ln_name, link->ln_namelen); return 0; } static int encode_lookup(struct xdr_stream *xdr, struct nfs4_lookup *lookup) { int len = lookup->lo_name->len; uint32_t *p; RESERVE_SPACE(8 + len); WRITE32(OP_LOOKUP); WRITE32(len); WRITEMEM(lookup->lo_name->name, len); return 0; } static int encode_open(struct xdr_stream *xdr, struct nfs4_open *open) { static int global_id = 0; int id = global_id++; int status; uint32_t *p; /* seqid, share_access, share_deny, clientid, ownerlen, owner, opentype */ RESERVE_SPACE(36); WRITE32(OP_OPEN); WRITE32(0); /* seqid */ WRITE32(open->op_share_access); WRITE32(0); /* for us, share_deny== 0 always */ WRITE64(open->op_client_state->cl_clientid); WRITE32(4); WRITE32(id); WRITE32(open->op_opentype); if (open->op_opentype == NFS4_OPEN_CREATE) { if (open->op_createmode == NFS4_CREATE_EXCLUSIVE) { RESERVE_SPACE(4+sizeof(nfs4_verifier)); WRITE32(open->op_createmode); WRITEMEM(open->op_verifier, sizeof(nfs4_verifier)); } else if (open->op_attrs) { RESERVE_SPACE(4); WRITE32(open->op_createmode); if ((status = encode_attrs(xdr, open->op_attrs))) return status; } else { RESERVE_SPACE(12); WRITE32(open->op_createmode); WRITE32(0); WRITE32(0); } } RESERVE_SPACE(8 + open->op_name->len); WRITE32(NFS4_OPEN_CLAIM_NULL); WRITE32(open->op_name->len); WRITEMEM(open->op_name->name, open->op_name->len); return 0; } static int encode_open_confirm(struct xdr_stream *xdr, struct nfs4_open_confirm *open_confirm) { uint32_t *p; /* * Note: In this "stateless" implementation, the OPEN_CONFIRM * seqid is always equal to 1. */ RESERVE_SPACE(8+sizeof(nfs4_stateid)); WRITE32(OP_OPEN_CONFIRM); WRITEMEM(open_confirm->oc_stateid, sizeof(nfs4_stateid)); WRITE32(1); return 0; } static int encode_putfh(struct xdr_stream *xdr, struct nfs4_putfh *putfh) { int len = putfh->pf_fhandle->size; uint32_t *p; RESERVE_SPACE(8 + len); WRITE32(OP_PUTFH); WRITE32(len); WRITEMEM(putfh->pf_fhandle->data, len); return 0; } static int encode_putrootfh(struct xdr_stream *xdr) { uint32_t *p; RESERVE_SPACE(4); WRITE32(OP_PUTROOTFH); return 0; } static int encode_read(struct xdr_stream *xdr, struct nfs4_read *read, struct rpc_rqst *req) { struct rpc_auth *auth = req->rq_task->tk_auth; int replen; uint32_t *p; RESERVE_SPACE(32); WRITE32(OP_READ); WRITE32(0); /* all-zero stateid! */ WRITE32(0); WRITE32(0); WRITE32(0); WRITE64(read->rd_offset); WRITE32(read->rd_length); /* set up reply iovec * toplevel status + taglen + rescount + OP_PUTFH + status * + OP_READ + status + eof + datalen = 9 */ replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2; xdr_inline_pages(&req->rq_rcv_buf, replen, read->rd_pages, read->rd_pgbase, read->rd_length); return 0; } static int encode_readdir(struct xdr_stream *xdr, struct nfs4_readdir *readdir, struct rpc_rqst *req) { struct rpc_auth *auth = req->rq_task->tk_auth; int replen; uint32_t *p; RESERVE_SPACE(32+sizeof(nfs4_verifier)); WRITE32(OP_READDIR); WRITE64(readdir->rd_cookie); WRITEMEM(readdir->rd_req_verifier, sizeof(nfs4_verifier)); WRITE32(readdir->rd_count >> 5); /* meaningless "dircount" field */ WRITE32(readdir->rd_count); WRITE32(2); WRITE32(readdir->rd_bmval[0]); WRITE32(readdir->rd_bmval[1]); /* set up reply iovec * toplevel_status + taglen + rescount + OP_PUTFH + status * + OP_READDIR + status + verifer(2) = 9 */ replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2; xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->rd_pages, readdir->rd_pgbase, readdir->rd_count); return 0; } static int encode_readlink(struct xdr_stream *xdr, struct nfs4_readlink *readlink, struct rpc_rqst *req) { struct rpc_auth *auth = req->rq_task->tk_auth; int replen; uint32_t *p; RESERVE_SPACE(4); WRITE32(OP_READLINK); /* set up reply iovec * toplevel_status + taglen + rescount + OP_PUTFH + status * + OP_READLINK + status = 7 */ replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2; xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->rl_pages, 0, readlink->rl_count); return 0; } static int encode_remove(struct xdr_stream *xdr, struct nfs4_remove *remove) { uint32_t *p; RESERVE_SPACE(8 + remove->rm_namelen); WRITE32(OP_REMOVE); WRITE32(remove->rm_namelen); WRITEMEM(remove->rm_name, remove->rm_namelen); return 0; } static int encode_rename(struct xdr_stream *xdr, struct nfs4_rename *rename) { uint32_t *p; RESERVE_SPACE(8 + rename->rn_oldnamelen); WRITE32(OP_RENAME); WRITE32(rename->rn_oldnamelen); WRITEMEM(rename->rn_oldname, rename->rn_oldnamelen); RESERVE_SPACE(4 + rename->rn_newnamelen); WRITE32(rename->rn_newnamelen); WRITEMEM(rename->rn_newname, rename->rn_newnamelen); return 0; } static int encode_renew(struct xdr_stream *xdr, struct nfs4_client *client_stateid) { uint32_t *p; RESERVE_SPACE(12); WRITE32(OP_RENEW); WRITE64(client_stateid->cl_clientid); return 0; } static int encode_restorefh(struct xdr_stream *xdr) { uint32_t *p; RESERVE_SPACE(4); WRITE32(OP_RESTOREFH); return 0; } static int encode_savefh(struct xdr_stream *xdr) { uint32_t *p; RESERVE_SPACE(4); WRITE32(OP_SAVEFH); return 0; } static int encode_setattr(struct xdr_stream *xdr, struct nfs4_setattr *setattr) { int status; uint32_t *p; RESERVE_SPACE(4+sizeof(nfs4_stateid)); WRITE32(OP_SETATTR); WRITEMEM(setattr->st_stateid, sizeof(nfs4_stateid)); if ((status = encode_attrs(xdr, setattr->st_iap))) return status; return 0; } static int encode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid *setclientid) { uint32_t total_len; uint32_t len1, len2, len3; uint32_t *p; len1 = strlen(setclientid->sc_name); len2 = strlen(setclientid->sc_netid); len3 = strlen(setclientid->sc_uaddr); total_len = XDR_QUADLEN(len1) + XDR_QUADLEN(len2) + XDR_QUADLEN(len3); total_len = (total_len << 2) + 24 + sizeof(nfs4_verifier); RESERVE_SPACE(total_len); WRITE32(OP_SETCLIENTID); WRITEMEM(setclientid->sc_verifier, sizeof(nfs4_verifier)); WRITE32(len1); WRITEMEM(setclientid->sc_name, len1); WRITE32(setclientid->sc_prog); WRITE32(len2); WRITEMEM(setclientid->sc_netid, len2); WRITE32(len3); WRITEMEM(setclientid->sc_uaddr, len3); WRITE32(setclientid->sc_cb_ident); return 0; } static int encode_setclientid_confirm(struct xdr_stream *xdr, struct nfs4_client *client_state) { uint32_t *p; RESERVE_SPACE(12 + sizeof(nfs4_verifier)); WRITE32(OP_SETCLIENTID_CONFIRM); WRITE64(client_state->cl_clientid); WRITEMEM(client_state->cl_confirm,sizeof(nfs4_verifier)); return 0; } static int encode_write(struct xdr_stream *xdr, struct nfs4_write *write, struct rpc_rqst *req) { struct xdr_buf *sndbuf = &req->rq_snd_buf; uint32_t *p; RESERVE_SPACE(36); WRITE32(OP_WRITE); WRITE32(0xffffffff); /* magic stateid -1 */ WRITE32(0xffffffff); WRITE32(0xffffffff); WRITE32(0xffffffff); WRITE64(write->wr_offset); WRITE32(write->wr_stable_how); WRITE32(write->wr_len); xdr_encode_pages(sndbuf, write->wr_pages, write->wr_pgbase, write->wr_len); return 0; } /* FIXME: this sucks */ static int encode_compound(struct xdr_stream *xdr, struct nfs4_compound *cp, struct rpc_rqst *req) { struct compound_hdr hdr = { .taglen = cp->taglen, .tag = cp->tag, .nops = cp->req_nops, }; int i, status = 0; encode_compound_hdr(xdr, &hdr); for (i = 0; i < cp->req_nops; i++) { switch (cp->ops[i].opnum) { case OP_ACCESS: status = encode_access(xdr, &cp->ops[i].u.access); break; case OP_CLOSE: status = encode_close(xdr, &cp->ops[i].u.close); break; case OP_COMMIT: status = encode_commit(xdr, &cp->ops[i].u.commit); break; case OP_CREATE: status = encode_create(xdr, &cp->ops[i].u.create); break; case OP_GETATTR: status = encode_getattr(xdr, &cp->ops[i].u.getattr); break; case OP_GETFH: status = encode_getfh(xdr); break; case OP_LINK: status = encode_link(xdr, &cp->ops[i].u.link); break; case OP_LOOKUP: status = encode_lookup(xdr, &cp->ops[i].u.lookup); break; case OP_OPEN: status = encode_open(xdr, &cp->ops[i].u.open); break; case OP_OPEN_CONFIRM: status = encode_open_confirm(xdr, &cp->ops[i].u.open_confirm); break; case OP_PUTFH: status = encode_putfh(xdr, &cp->ops[i].u.putfh); break; case OP_PUTROOTFH: status = encode_putrootfh(xdr); break; case OP_READ: status = encode_read(xdr, &cp->ops[i].u.read, req); break; case OP_READDIR: status = encode_readdir(xdr, &cp->ops[i].u.readdir, req); break; case OP_READLINK: status = encode_readlink(xdr, &cp->ops[i].u.readlink, req); break; case OP_REMOVE: status = encode_remove(xdr, &cp->ops[i].u.remove); break; case OP_RENAME: status = encode_rename(xdr, &cp->ops[i].u.rename); break; case OP_RENEW: status = encode_renew(xdr, cp->ops[i].u.renew); break; case OP_RESTOREFH: status = encode_restorefh(xdr); break; case OP_SAVEFH: status = encode_savefh(xdr); break; case OP_SETATTR: status = encode_setattr(xdr, &cp->ops[i].u.setattr); break; case OP_SETCLIENTID: status = encode_setclientid(xdr, &cp->ops[i].u.setclientid); break; case OP_SETCLIENTID_CONFIRM: status = encode_setclientid_confirm(xdr, cp->ops[i].u.setclientid_confirm); break; case OP_WRITE: status = encode_write(xdr, &cp->ops[i].u.write, req); break; default: BUG(); } if (status) return status; } return 0; } /* * END OF "GENERIC" ENCODE ROUTINES. */ /* * Encode COMPOUND argument */ static int nfs4_xdr_enc_compound(struct rpc_rqst *req, uint32_t *p, struct nfs4_compound *cp) { struct xdr_stream xdr; int status; xdr_init_encode(&xdr, &req->rq_snd_buf, p); status = encode_compound(&xdr, cp, req); cp->timestamp = jiffies; return status; } /* * START OF "GENERIC" DECODE ROUTINES. * These may look a little ugly since they are imported from a "generic" * set of XDR encode/decode routines which are intended to be shared by * all of our NFSv4 implementations (OpenBSD, MacOS X...). * * If the pain of reading these is too great, it should be a straightforward * task to translate them into Linux-specific versions which are more * consistent with the style used in NFSv2/v3... */ #define DECODE_TAIL \ status = 0; \ out: \ return status; \ xdr_error: \ printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ status = -EIO; \ goto out #define READ32(x) (x) = ntohl(*p++) #define READ64(x) do { \ (x) = (u64)ntohl(*p++) << 32; \ (x) |= ntohl(*p++); \ } while (0) #define READTIME(x) do { \ p++; \ (x.tv_sec) = ntohl(*p++); \ (x.tv_nsec) = ntohl(*p++); \ } while (0) #define COPYMEM(x,nbytes) do { \ memcpy((x), p, nbytes); \ p += XDR_QUADLEN(nbytes); \ } while (0) #define READ_BUF(nbytes) do { \ p = xdr_inline_decode(xdr, nbytes); \ if (!p) { \ printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \ __FUNCTION__, __LINE__); \ return -EIO; \ } \ } while (0) /* * FIXME: The following dummy entry will be replaced once the userland * upcall gets in... */ static int decode_uid(char *p, uint32_t len, uid_t *uid) { *uid = -2; return 0; } /* * FIXME: The following dummy entry will be replaced once the userland * upcall gets in... */ static int decode_gid(char *p, uint32_t len, gid_t *gid) { *gid = -2; return 0; } static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) { uint32_t *p; READ_BUF(8); READ32(hdr->status); READ32(hdr->taglen); READ_BUF(hdr->taglen + 4); hdr->tag = (char *)p; p += XDR_QUADLEN(hdr->taglen); READ32(hdr->nops); return 0; } static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) { uint32_t *p; uint32_t opnum; int32_t nfserr; READ_BUF(8); READ32(opnum); if (opnum != expected) { printk(KERN_NOTICE "nfs4_decode_op_hdr: Server returned operation" " %d but we issued a request for %d\n", opnum, expected); return -EIO; } READ32(nfserr); if (nfserr != NFS_OK) return -nfs_stat_to_errno(nfserr); return 0; } static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) { uint32_t *p; READ_BUF(20); READ32(cinfo->atomic); READ64(cinfo->before); READ64(cinfo->after); return 0; } static int decode_access(struct xdr_stream *xdr, struct nfs4_access *access) { uint32_t *p; uint32_t supp, acc; int status; status = decode_op_hdr(xdr, OP_ACCESS); if (status) return status; READ_BUF(8); READ32(supp); READ32(acc); if ((supp & ~access->ac_req_access) || (acc & ~supp)) { printk(KERN_NOTICE "NFS: server returned bad bits in access call!\n"); return -EIO; } *access->ac_resp_supported = supp; *access->ac_resp_access = acc; return 0; } static int decode_close(struct xdr_stream *xdr, struct nfs4_close *close) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_CLOSE); if (status) return status; READ_BUF(sizeof(nfs4_stateid)); COPYMEM(close->cl_stateid, sizeof(nfs4_stateid)); return 0; } static int decode_commit(struct xdr_stream *xdr, struct nfs4_commit *commit) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_COMMIT); if (status) return status; READ_BUF(8); COPYMEM(commit->co_verifier->verifier, 8); return 0; } static int decode_create(struct xdr_stream *xdr, struct nfs4_create *create) { uint32_t *p; uint32_t bmlen; int status; status = decode_op_hdr(xdr, OP_CREATE); if (status) return status; if ((status = decode_change_info(xdr, create->cr_cinfo))) return status; READ_BUF(4); READ32(bmlen); READ_BUF(bmlen << 2); return 0; } extern uint32_t nfs4_fattr_bitmap[2]; extern uint32_t nfs4_fsinfo_bitmap[2]; extern uint32_t nfs4_fsstat_bitmap[2]; extern uint32_t nfs4_pathconf_bitmap[2]; static int decode_getattr(struct xdr_stream *xdr, struct nfs4_getattr *getattr) { struct nfs_fattr *nfp = getattr->gt_attrs; struct nfs_fsstat *fsstat = getattr->gt_fsstat; struct nfs_fsinfo *fsinfo = getattr->gt_fsinfo; struct nfs_pathconf *pathconf = getattr->gt_pathconf; uint32_t attrlen, dummy32, bmlen, bmval0 = 0, bmval1 = 0, len = 0; uint32_t *p; unsigned int type; int fmode = 0; int status; status = decode_op_hdr(xdr, OP_GETATTR); if (status) return status; READ_BUF(4); READ32(bmlen); if (bmlen > 2) goto xdr_error; READ_BUF((bmlen << 2) + 4); if (bmlen > 0) READ32(bmval0); if (bmlen > 1) READ32(bmval1); READ32(attrlen); if ((bmval0 & ~getattr->gt_bmval[0]) || (bmval1 & ~getattr->gt_bmval[1])) { dprintk("read_attrs: server returned bad attributes!\n"); goto xdr_error; } getattr->gt_bmres[0] = bmval0; getattr->gt_bmres[1] = bmval1; /* * In case the server doesn't return some attributes, * we initialize them here to some nominal values.. */ if (nfp) { nfp->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4; nfp->nlink = 1; nfp->timestamp = jiffies; } if (fsinfo) { fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */ fsinfo->lease_time = 60; } if (bmval0 & FATTR4_WORD0_TYPE) { READ_BUF(4); len += 4; READ32(type); if (type < NF4REG || type > NF4NAMEDATTR) { dprintk("read_attrs: bad type %d\n", type); goto xdr_error; } nfp->type = nfs_type2fmt[type].nfs2type; fmode = nfs_type2fmt[type].mode; dprintk("read_attrs: type=%d\n", (uint32_t)nfp->type); } if (bmval0 & FATTR4_WORD0_CHANGE) { READ_BUF(8); len += 8; READ64(nfp->change_attr); dprintk("read_attrs: changeid=%Ld\n", (long long)nfp->change_attr); } if (bmval0 & FATTR4_WORD0_SIZE) { READ_BUF(8); len += 8; READ64(nfp->size); dprintk("read_attrs: size=%Ld\n", (long long)nfp->size); } if (bmval0 & FATTR4_WORD0_FSID) { READ_BUF(16); len += 16; READ64(nfp->fsid_u.nfs4.major); READ64(nfp->fsid_u.nfs4.minor); dprintk("read_attrs: fsid=0x%Lx/0x%Lx\n", (long long)nfp->fsid_u.nfs4.major, (long long)nfp->fsid_u.nfs4.minor); } if (bmval0 & FATTR4_WORD0_LEASE_TIME) { READ_BUF(4); len += 4; READ32(fsinfo->lease_time); dprintk("read_attrs: lease_time=%d\n", fsinfo->lease_time); } if (bmval0 & FATTR4_WORD0_FILEID) { READ_BUF(8); len += 8; READ64(nfp->fileid); dprintk("read_attrs: fileid=%Ld\n", (long long) nfp->fileid); } if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { READ_BUF(8); len += 8; READ64(fsstat->afiles); dprintk("read_attrs: files_avail=0x%Lx\n", (long long) fsstat->afiles); } if (bmval0 & FATTR4_WORD0_FILES_FREE) { READ_BUF(8); len += 8; READ64(fsstat->ffiles); dprintk("read_attrs: files_free=0x%Lx\n", (long long) fsstat->ffiles); } if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { READ_BUF(8); len += 8; READ64(fsstat->tfiles); dprintk("read_attrs: files_tot=0x%Lx\n", (long long) fsstat->tfiles); } if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { READ_BUF(8); len += 8; READ64(fsinfo->maxfilesize); dprintk("read_attrs: maxfilesize=0x%Lx\n", (long long) fsinfo->maxfilesize); } if (bmval0 & FATTR4_WORD0_MAXLINK) { READ_BUF(4); len += 4; READ32(pathconf->max_link); dprintk("read_attrs: maxlink=%d\n", pathconf->max_link); } if (bmval0 & FATTR4_WORD0_MAXNAME) { READ_BUF(4); len += 4; READ32(pathconf->max_namelen); dprintk("read_attrs: maxname=%d\n", pathconf->max_namelen); } if (bmval0 & FATTR4_WORD0_MAXREAD) { READ_BUF(8); len += 8; READ64(fsinfo->rtmax); fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax; dprintk("read_attrs: maxread=%d\n", fsinfo->rtmax); } if (bmval0 & FATTR4_WORD0_MAXWRITE) { READ_BUF(8); len += 8; READ64(fsinfo->wtmax); fsinfo->wtpref = fsinfo->wtmax; dprintk("read_attrs: maxwrite=%d\n", fsinfo->wtmax); } if (bmval1 & FATTR4_WORD1_MODE) { READ_BUF(4); len += 4; READ32(dummy32); nfp->mode = (dummy32 & ~S_IFMT) | fmode; dprintk("read_attrs: mode=0%o\n", nfp->mode); } if (bmval1 & FATTR4_WORD1_NUMLINKS) { READ_BUF(4); len += 4; READ32(nfp->nlink); dprintk("read_attrs: nlinks=0%o\n", nfp->nlink); } if (bmval1 & FATTR4_WORD1_OWNER) { READ_BUF(4); len += 4; READ32(dummy32); /* name length */ if (dummy32 > XDR_MAX_NETOBJ) { dprintk("read_attrs: name too long!\n"); goto xdr_error; } READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); if ((status = decode_uid((char *)p, dummy32, &nfp->uid))) { dprintk("read_attrs: gss_get_num failed!\n"); goto out; } dprintk("read_attrs: uid=%d\n", (int)nfp->uid); } if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { READ_BUF(4); len += 4; READ32(dummy32); if (dummy32 > XDR_MAX_NETOBJ) { dprintk("read_attrs: name too long!\n"); goto xdr_error; } READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); if ((status = decode_gid((char *)p, dummy32, &nfp->gid))) { dprintk("read_attrs: gss_get_num failed!\n"); goto out; } dprintk("read_attrs: gid=%d\n", (int)nfp->gid); } if (bmval1 & FATTR4_WORD1_RAWDEV) { READ_BUF(8); len += 8; READ32(dummy32); nfp->rdev = (dummy32 << MINORBITS); READ32(dummy32); nfp->rdev |= (dummy32 & MINORMASK); dprintk("read_attrs: rdev=%d\n", nfp->rdev); } if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { READ_BUF(8); len += 8; READ64(fsstat->abytes); dprintk("read_attrs: savail=0x%Lx\n", (long long) fsstat->abytes); } if (bmval1 & FATTR4_WORD1_SPACE_FREE) { READ_BUF(8); len += 8; READ64(fsstat->fbytes); dprintk("read_attrs: sfree=0x%Lx\n", (long long) fsstat->fbytes); } if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { READ_BUF(8); len += 8; READ64(fsstat->tbytes); dprintk("read_attrs: stotal=0x%Lx\n", (long long) fsstat->tbytes); } if (bmval1 & FATTR4_WORD1_SPACE_USED) { READ_BUF(8); len += 8; READ64(nfp->du.nfs3.used); dprintk("read_attrs: sused=0x%Lx\n", (long long) nfp->du.nfs3.used); } if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { READ_BUF(12); len += 12; READTIME(nfp->atime); dprintk("read_attrs: atime=%ld\n", (long)nfp->atime.tv_sec); } if (bmval1 & FATTR4_WORD1_TIME_METADATA) { READ_BUF(12); len += 12; READTIME(nfp->ctime); dprintk("read_attrs: ctime=%ld\n", (long)nfp->ctime.tv_sec); } if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { READ_BUF(12); len += 12; READTIME(nfp->mtime); dprintk("read_attrs: mtime=%ld\n", (long)nfp->mtime.tv_sec); } if (len != attrlen) goto xdr_error; DECODE_TAIL; } static int decode_getfh(struct xdr_stream *xdr, struct nfs4_getfh *getfh) { struct nfs_fh *fh = getfh->gf_fhandle; uint32_t *p; uint32_t len; int status; status = decode_op_hdr(xdr, OP_GETFH); if (status) return status; /* Zero handle first to allow comparisons */ memset(fh, 0, sizeof(*fh)); READ_BUF(4); READ32(len); if (len > NFS_MAXFHSIZE) return -EIO; fh->size = len; READ_BUF(len); COPYMEM(fh->data, len); return 0; } static int decode_link(struct xdr_stream *xdr, struct nfs4_link *link) { int status; status = decode_op_hdr(xdr, OP_LINK); if (status) return status; return decode_change_info(xdr, link->ln_cinfo); } static int decode_lookup(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_LOOKUP); } static int decode_open(struct xdr_stream *xdr, struct nfs4_open *open) { uint32_t *p; uint32_t bmlen, delegation_type; int status; status = decode_op_hdr(xdr, OP_OPEN); if (status) return status; READ_BUF(sizeof(nfs4_stateid)); COPYMEM(open->op_stateid, sizeof(nfs4_stateid)); decode_change_info(xdr, open->op_cinfo); READ_BUF(8); READ32(*open->op_rflags); READ32(bmlen); if (bmlen > 10) goto xdr_error; READ_BUF((bmlen << 2) + 4); p += bmlen; READ32(delegation_type); if (delegation_type != NFS4_OPEN_DELEGATE_NONE) goto xdr_error; DECODE_TAIL; } static int decode_open_confirm(struct xdr_stream *xdr, struct nfs4_open_confirm *open_confirm) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_OPEN_CONFIRM); if (status) return status; READ_BUF(sizeof(nfs4_stateid)); COPYMEM(open_confirm->oc_stateid, sizeof(nfs4_stateid)); return 0; } static int decode_putfh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_PUTFH); } static int decode_putrootfh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_PUTROOTFH); } static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_read *read) { struct iovec *iov = req->rq_rvec; uint32_t *p; uint32_t count, eof, recvd, hdrlen; int status; status = decode_op_hdr(xdr, OP_READ); if (status) return status; READ_BUF(8); READ32(eof); READ32(count); hdrlen = (u8 *) p - (u8 *) iov->iov_base; if (iov->iov_len < hdrlen) { printk(KERN_WARNING "NFS: READ reply header overflowed:" "length %u > %Zu\n", hdrlen, iov->iov_len); return -errno_NFSERR_IO; } else if (iov->iov_len != hdrlen) { dprintk("NFS: READ header is short. iovec will be shifted.\n"); xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); } recvd = req->rq_received - hdrlen; if (count > recvd) { printk(KERN_WARNING "NFS: server cheating in read reply: " "count %u > recvd %u\n", count, recvd); count = recvd; eof = 0; } if (read->rd_eof) *read->rd_eof = eof; *read->rd_bytes_read = count; return 0; } static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir *readdir) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct page *page = *rcvbuf->pages; struct iovec *iov = rcvbuf->head; unsigned int nr, pglen = rcvbuf->page_len; uint32_t *end, *entry, *p; uint32_t len, attrlen, word; int i, hdrlen, recvd, status; status = decode_op_hdr(xdr, OP_READDIR); if (status) return status; READ_BUF(8); COPYMEM(readdir->rd_resp_verifier, 8); hdrlen = (char *) p - (char *) iov->iov_base; if (iov->iov_len < hdrlen) { printk(KERN_WARNING "NFS: READDIR reply header overflowed:" "length %d > %Zu\n", hdrlen, iov->iov_len); return -EIO; } else if (iov->iov_len != hdrlen) { dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); } recvd = req->rq_received - hdrlen; if (pglen > recvd) pglen = recvd; BUG_ON(pglen + readdir->rd_pgbase > PAGE_CACHE_SIZE); p = (uint32_t *) kmap(page); end = (uint32_t *) ((char *)p + pglen + readdir->rd_pgbase); entry = p; for (nr = 0; *p++; nr++) { if (p + 3 > end) goto short_pkt; p += 2; /* cookie */ len = ntohl(*p++); /* filename length */ if (len > NFS4_MAXNAMLEN) { printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len); goto err_unmap; } p += XDR_QUADLEN(len); if (p + 1 > end) goto short_pkt; len = ntohl(*p++); /* bitmap length */ if (len > 10) { printk(KERN_WARNING "NFS: giant bitmap in readdir (len 0x%x)\n", len); goto err_unmap; } if (p + len + 1 > end) goto short_pkt; attrlen = 0; for (i = 0; i < len; i++) { word = ntohl(*p++); if (!word) continue; else if (i == 0 && word == FATTR4_WORD0_FILEID) { attrlen = 8; continue; } printk(KERN_WARNING "NFS: unexpected bitmap word in readdir (0x%x)\n", word); goto err_unmap; } if (ntohl(*p++) != attrlen) { printk(KERN_WARNING "NFS: unexpected attrlen in readdir\n"); goto err_unmap; } p += XDR_QUADLEN(attrlen); if (p + 1 > end) goto short_pkt; } if (!nr && (entry[0] != 0 || entry[1] == 0)) goto short_pkt; out: kunmap(page); return 0; short_pkt: entry[0] = entry[1] = 0; /* truncate listing ? */ if (!nr) { printk(KERN_NOTICE "NFS: readdir reply truncated!\n"); entry[1] = 1; } goto out; err_unmap: kunmap(page); return -errno_NFSERR_IO; } static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readlink *readlink) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct iovec *iov = rcvbuf->head; uint32_t *strlen; unsigned int hdrlen, len; char *string; int status; status = decode_op_hdr(xdr, OP_READLINK); if (status) return status; hdrlen = (char *) xdr->p - (char *) iov->iov_base; if (iov->iov_len > hdrlen) { dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); } /* * The XDR encode routine has set things up so that * the link text will be copied directly into the * buffer. We just have to do overflow-checking, * and and null-terminate the text (the VFS expects * null-termination). */ strlen = (uint32_t *) kmap(rcvbuf->pages[0]); len = ntohl(*strlen); if (len > PAGE_CACHE_SIZE - 5) { printk(KERN_WARNING "nfs: server returned giant symlink!\n"); kunmap(rcvbuf->pages[0]); return -EIO; } *strlen = len; string = (char *)(strlen + 1); string[len] = '\0'; kunmap(rcvbuf->pages[0]); return 0; } static int decode_restorefh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_RESTOREFH); } static int decode_remove(struct xdr_stream *xdr, struct nfs4_remove *remove) { int status; status = decode_op_hdr(xdr, OP_REMOVE); if (status) goto out; status = decode_change_info(xdr, remove->rm_cinfo); out: return status; } static int decode_rename(struct xdr_stream *xdr, struct nfs4_rename *rename) { int status; status = decode_op_hdr(xdr, OP_RENAME); if (status) goto out; if ((status = decode_change_info(xdr, rename->rn_src_cinfo))) goto out; if ((status = decode_change_info(xdr, rename->rn_dst_cinfo))) goto out; out: return status; } static int decode_renew(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_RENEW); } static int decode_savefh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_SAVEFH); } static int decode_setattr(struct xdr_stream *xdr) { uint32_t *p; uint32_t bmlen; int status; status = decode_op_hdr(xdr, OP_SETATTR); if (status) return status; READ_BUF(4); READ32(bmlen); READ_BUF(bmlen << 2); return 0; } static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid *setclientid) { uint32_t *p; uint32_t opnum; int32_t nfserr; READ_BUF(8); READ32(opnum); if (opnum != OP_SETCLIENTID) { printk(KERN_NOTICE "nfs4_decode_setclientid: Server returned operation" " %d\n", opnum); return -EIO; } READ32(nfserr); if (nfserr == NFS_OK) { READ_BUF(8 + sizeof(nfs4_verifier)); READ64(setclientid->sc_state->cl_clientid); COPYMEM(setclientid->sc_state->cl_confirm, sizeof(nfs4_verifier)); } else if (nfserr == NFSERR_CLID_INUSE) { uint32_t len; /* skip netid string */ READ_BUF(4); READ32(len); READ_BUF(len); /* skip uaddr string */ READ_BUF(4); READ32(len); READ_BUF(len); return -EEXIST; } else return -nfs_stat_to_errno(nfserr); return 0; } static int decode_setclientid_confirm(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM); } static int decode_write(struct xdr_stream *xdr, struct nfs4_write *write) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_WRITE); if (status) return status; READ_BUF(16); READ32(*write->wr_bytes_written); if (*write->wr_bytes_written > write->wr_len) return -EIO; READ32(write->wr_verf->committed); COPYMEM(write->wr_verf->verifier, 8); return 0; } /* FIXME: this sucks */ static int decode_compound(struct xdr_stream *xdr, struct nfs4_compound *cp, struct rpc_rqst *req) { struct compound_hdr hdr; struct nfs4_op *op; int status; status = decode_compound_hdr(xdr, &hdr); if (status) goto out; cp->toplevel_status = hdr.status; /* * We need this if our zero-copy I/O is going to work. Rumor has * it that the spec will soon mandate it... */ if (hdr.taglen != cp->taglen) dprintk("nfs4: non-conforming server returns tag length mismatch!\n"); cp->resp_nops = hdr.nops; if (hdr.nops > cp->req_nops) { dprintk("nfs4: resp_nops > req_nops!\n"); goto xdr_error; } op = &cp->ops[0]; for (cp->nops = 0; cp->nops < cp->resp_nops; cp->nops++, op++) { switch (op->opnum) { case OP_ACCESS: status = decode_access(xdr, &op->u.access); break; case OP_CLOSE: status = decode_close(xdr, &op->u.close); break; case OP_COMMIT: status = decode_commit(xdr, &op->u.commit); break; case OP_CREATE: status = decode_create(xdr, &op->u.create); break; case OP_GETATTR: status = decode_getattr(xdr, &op->u.getattr); break; case OP_GETFH: status = decode_getfh(xdr, &op->u.getfh); break; case OP_LINK: status = decode_link(xdr, &op->u.link); break; case OP_LOOKUP: status = decode_lookup(xdr); break; case OP_OPEN: status = decode_open(xdr, &op->u.open); break; case OP_OPEN_CONFIRM: status = decode_open_confirm(xdr, &op->u.open_confirm); break; case OP_PUTFH: status = decode_putfh(xdr); break; case OP_PUTROOTFH: status = decode_putrootfh(xdr); break; case OP_READ: status = decode_read(xdr, req, &op->u.read); break; case OP_READDIR: status = decode_readdir(xdr, req, &op->u.readdir); break; case OP_READLINK: status = decode_readlink(xdr, req, &op->u.readlink); break; case OP_RESTOREFH: status = decode_restorefh(xdr); break; case OP_REMOVE: status = decode_remove(xdr, &op->u.remove); break; case OP_RENAME: status = decode_rename(xdr, &op->u.rename); break; case OP_RENEW: status = decode_renew(xdr); break; case OP_SAVEFH: status = decode_savefh(xdr); break; case OP_SETATTR: status = decode_setattr(xdr); break; case OP_SETCLIENTID: status = decode_setclientid(xdr, &op->u.setclientid); break; case OP_SETCLIENTID_CONFIRM: status = decode_setclientid_confirm(xdr); break; case OP_WRITE: status = decode_write(xdr, &op->u.write); break; default: BUG(); return -EIO; } if (status) break; } DECODE_TAIL; } /* * END OF "GENERIC" DECODE ROUTINES. */ /* * Decode COMPOUND response */ static int nfs4_xdr_dec_compound(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_compound *cp) { struct xdr_stream xdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); if ((status = decode_compound(&xdr, cp, rqstp))) goto out; status = 0; if (cp->toplevel_status) status = -nfs_stat_to_errno(cp->toplevel_status); out: return status; } uint32_t * nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus) { uint32_t len; if (!*p++) { if (!*p) return ERR_PTR(-EAGAIN); entry->eof = 1; return ERR_PTR(-EBADCOOKIE); } entry->prev_cookie = entry->cookie; p = xdr_decode_hyper(p, &entry->cookie); entry->len = ntohl(*p++); entry->name = (const char *) p; p += XDR_QUADLEN(entry->len); if (entry->cookie > COOKIE_MAX) entry->cookie = COOKIE_MAX; /* * In case the server doesn't return an inode number, * we fake one here. (We don't use inode number 0, * since glibc seems to choke on it...) */ entry->ino = 1; len = ntohl(*p++); /* bitmap length */ p += len; len = ntohl(*p++); /* attribute buffer length */ if (len) p = xdr_decode_hyper(p, &entry->ino); entry->eof = !p[0] && p[1]; return p; } #ifndef MAX # define MAX(a, b) (((a) > (b))? (a) : (b)) #endif #define PROC(proc, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_COMPOUND, \ .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \ } struct rpc_procinfo nfs4_procedures[] = { PROC(COMPOUND, enc_compound, dec_compound), }; struct rpc_version nfs_version4 = { .number = 4, .nrprocs = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]), .procs = nfs4_procedures }; /* * Local variables: * c-basic-offset: 8 * End: */