/* * linux/fs/nfs/nfs3xdr.c * * XDR functions to encode/decode NFSv3 RPC arguments and results. * * Copyright (C) 1996, 1997 Olaf Kirch */ #include <linux/param.h> #include <linux/time.h> #include <linux/mm.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/nfs3.h> #include <linux/nfs_fs.h> #include <linux/nfsacl.h> #include "internal.h" #define NFSDBG_FACILITY NFSDBG_XDR /* Mapping from NFS error code to "errno" error code. */ #define errno_NFSERR_IO EIO /* * Declare the space requirements for NFS arguments and replies as * number of 32bit-words */ #define NFS3_fhandle_sz (1+16) #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ #define NFS3_sattr_sz (15) #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) #define NFS3_fattr_sz (21) #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) #define NFS3_wcc_attr_sz (6) #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_getattrargs_sz (NFS3_fh_sz) #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_accessargs_sz (NFS3_fh_sz+1) #define NFS3_readlinkargs_sz (NFS3_fh_sz) #define NFS3_readargs_sz (NFS3_fh_sz+3) #define NFS3_writeargs_sz (NFS3_fh_sz+5) #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) #define NFS3_commitargs_sz (NFS3_fh_sz+3) #define NFS3_getattrres_sz (1+NFS3_fattr_sz) #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) #define NFS3_removeres_sz (NFS3_setattrres_sz) #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) #define ACL3_getaclargs_sz (NFS3_fh_sz+1) #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) /* * Map file type to S_IFMT bits */ static const umode_t nfs_type2fmt[] = { [NF3BAD] = 0, [NF3REG] = S_IFREG, [NF3DIR] = S_IFDIR, [NF3BLK] = S_IFBLK, [NF3CHR] = S_IFCHR, [NF3LNK] = S_IFLNK, [NF3SOCK] = S_IFSOCK, [NF3FIFO] = S_IFIFO, }; /* * While encoding arguments, set up the reply buffer in advance to * receive reply data directly into the page cache. */ static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, unsigned int base, unsigned int len, unsigned int bufsize) { struct rpc_auth *auth = req->rq_cred->cr_auth; unsigned int replen; replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); } /* * Handle decode buffer overflows out-of-line. */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { dprintk("NFS: %s prematurely hit the end of our receive buffer. " "Remaining buffer length is %tu words.\n", func, xdr->end - xdr->p); } /* * Encode/decode NFSv3 basic data types * * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: * "NFS Version 3 Protocol Specification". * * Not all basic data types have their own encoding and decoding * functions. For run-time efficiency, some data types are encoded * or decoded inline. */ static void encode_uint32(struct xdr_stream *xdr, u32 value) { __be32 *p = xdr_reserve_space(xdr, 4); *p = cpu_to_be32(value); } static int decode_uint32(struct xdr_stream *xdr, u32 *value) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; *value = be32_to_cpup(p); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_uint64(struct xdr_stream *xdr, u64 *value) { __be32 *p; p = xdr_inline_decode(xdr, 8); if (unlikely(p == NULL)) goto out_overflow; xdr_decode_hyper(p, value); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * fileid3 * * typedef uint64 fileid3; */ static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) { return xdr_decode_hyper(p, fileid); } static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) { return decode_uint64(xdr, fileid); } /* * filename3 * * typedef string filename3<>; */ static void encode_filename3(struct xdr_stream *xdr, const char *name, u32 length) { __be32 *p; BUG_ON(length > NFS3_MAXNAMLEN); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } static int decode_inline_filename3(struct xdr_stream *xdr, const char **name, u32 *length) { __be32 *p; u32 count; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; count = be32_to_cpup(p); if (count > NFS3_MAXNAMLEN) goto out_nametoolong; p = xdr_inline_decode(xdr, count); if (unlikely(p == NULL)) goto out_overflow; *name = (const char *)p; *length = count; return 0; out_nametoolong: dprintk("NFS: returned filename too long: %u\n", count); return -ENAMETOOLONG; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * nfspath3 * * typedef string nfspath3<>; */ static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, const u32 length) { BUG_ON(length > NFS3_MAXPATHLEN); encode_uint32(xdr, length); xdr_write_pages(xdr, pages, 0, length); } static int decode_nfspath3(struct xdr_stream *xdr) { u32 recvd, count; size_t hdrlen; __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; count = be32_to_cpup(p); if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) goto out_nametoolong; hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; recvd = xdr->buf->len - hdrlen; if (unlikely(count > recvd)) goto out_cheating; xdr_read_pages(xdr, count); xdr_terminate_string(xdr->buf, count); return 0; out_nametoolong: dprintk("NFS: returned pathname too long: %u\n", count); return -ENAMETOOLONG; out_cheating: dprintk("NFS: server cheating in pathname result: " "count %u > recvd %u\n", count, recvd); return -EIO; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * cookie3 * * typedef uint64 cookie3 */ static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) { return xdr_encode_hyper(p, cookie); } static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) { return decode_uint64(xdr, cookie); } /* * cookieverf3 * * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; */ static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) { memcpy(p, verifier, NFS3_COOKIEVERFSIZE); return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); } static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) { __be32 *p; p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); if (unlikely(p == NULL)) goto out_overflow; memcpy(verifier, p, NFS3_COOKIEVERFSIZE); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * createverf3 * * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; */ static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) { __be32 *p; p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); memcpy(p, verifier, NFS3_CREATEVERFSIZE); } static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) { __be32 *p; p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); if (unlikely(p == NULL)) goto out_overflow; memcpy(verifier, p, NFS3_WRITEVERFSIZE); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * size3 * * typedef uint64 size3; */ static __be32 *xdr_decode_size3(__be32 *p, u64 *size) { return xdr_decode_hyper(p, size); } /* * nfsstat3 * * enum nfsstat3 { * NFS3_OK = 0, * ... * } */ #define NFS3_OK NFS_OK static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; *status = be32_to_cpup(p); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * ftype3 * * enum ftype3 { * NF3REG = 1, * NF3DIR = 2, * NF3BLK = 3, * NF3CHR = 4, * NF3LNK = 5, * NF3SOCK = 6, * NF3FIFO = 7 * }; */ static void encode_ftype3(struct xdr_stream *xdr, const u32 type) { BUG_ON(type > NF3FIFO); encode_uint32(xdr, type); } static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) { u32 type; type = be32_to_cpup(p++); if (type > NF3FIFO) type = NF3NON; *mode = nfs_type2fmt[type]; return p; } /* * specdata3 * * struct specdata3 { * uint32 specdata1; * uint32 specdata2; * }; */ static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) { __be32 *p; p = xdr_reserve_space(xdr, 8); *p++ = cpu_to_be32(MAJOR(rdev)); *p = cpu_to_be32(MINOR(rdev)); } static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) { unsigned int major, minor; major = be32_to_cpup(p++); minor = be32_to_cpup(p++); *rdev = MKDEV(major, minor); if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) *rdev = 0; return p; } /* * nfs_fh3 * * struct nfs_fh3 { * opaque data<NFS3_FHSIZE>; * }; */ static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) { __be32 *p; BUG_ON(fh->size > NFS3_FHSIZE); p = xdr_reserve_space(xdr, 4 + fh->size); xdr_encode_opaque(p, fh->data, fh->size); } static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) { u32 length; __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; length = be32_to_cpup(p++); if (unlikely(length > NFS3_FHSIZE)) goto out_toobig; p = xdr_inline_decode(xdr, length); if (unlikely(p == NULL)) goto out_overflow; fh->size = length; memcpy(fh->data, p, length); return 0; out_toobig: dprintk("NFS: file handle size (%u) too big\n", length); return -E2BIG; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static void zero_nfs_fh3(struct nfs_fh *fh) { memset(fh, 0, sizeof(*fh)); } /* * nfstime3 * * struct nfstime3 { * uint32 seconds; * uint32 nseconds; * }; */ static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) { *p++ = cpu_to_be32(timep->tv_sec); *p++ = cpu_to_be32(timep->tv_nsec); return p; } static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) { timep->tv_sec = be32_to_cpup(p++); timep->tv_nsec = be32_to_cpup(p++); return p; } /* * sattr3 * * enum time_how { * DONT_CHANGE = 0, * SET_TO_SERVER_TIME = 1, * SET_TO_CLIENT_TIME = 2 * }; * * union set_mode3 switch (bool set_it) { * case TRUE: * mode3 mode; * default: * void; * }; * * union set_uid3 switch (bool set_it) { * case TRUE: * uid3 uid; * default: * void; * }; * * union set_gid3 switch (bool set_it) { * case TRUE: * gid3 gid; * default: * void; * }; * * union set_size3 switch (bool set_it) { * case TRUE: * size3 size; * default: * void; * }; * * union set_atime switch (time_how set_it) { * case SET_TO_CLIENT_TIME: * nfstime3 atime; * default: * void; * }; * * union set_mtime switch (time_how set_it) { * case SET_TO_CLIENT_TIME: * nfstime3 mtime; * default: * void; * }; * * struct sattr3 { * set_mode3 mode; * set_uid3 uid; * set_gid3 gid; * set_size3 size; * set_atime atime; * set_mtime mtime; * }; */ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) { u32 nbytes; __be32 *p; /* * In order to make only a single xdr_reserve_space() call, * pre-compute the total number of bytes to be reserved. * Six boolean values, one for each set_foo field, are always * present in the encoded result, so start there. */ nbytes = 6 * 4; if (attr->ia_valid & ATTR_MODE) nbytes += 4; if (attr->ia_valid & ATTR_UID) nbytes += 4; if (attr->ia_valid & ATTR_GID) nbytes += 4; if (attr->ia_valid & ATTR_SIZE) nbytes += 8; if (attr->ia_valid & ATTR_ATIME_SET) nbytes += 8; if (attr->ia_valid & ATTR_MTIME_SET) nbytes += 8; p = xdr_reserve_space(xdr, nbytes); if (attr->ia_valid & ATTR_MODE) { *p++ = xdr_one; *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); } else *p++ = xdr_zero; if (attr->ia_valid & ATTR_UID) { *p++ = xdr_one; *p++ = cpu_to_be32(attr->ia_uid); } else *p++ = xdr_zero; if (attr->ia_valid & ATTR_GID) { *p++ = xdr_one; *p++ = cpu_to_be32(attr->ia_gid); } else *p++ = xdr_zero; if (attr->ia_valid & ATTR_SIZE) { *p++ = xdr_one; p = xdr_encode_hyper(p, (u64)attr->ia_size); } else *p++ = xdr_zero; if (attr->ia_valid & ATTR_ATIME_SET) { *p++ = xdr_two; p = xdr_encode_nfstime3(p, &attr->ia_atime); } else if (attr->ia_valid & ATTR_ATIME) { *p++ = xdr_one; } else *p++ = xdr_zero; if (attr->ia_valid & ATTR_MTIME_SET) { *p++ = xdr_two; xdr_encode_nfstime3(p, &attr->ia_mtime); } else if (attr->ia_valid & ATTR_MTIME) { *p = xdr_one; } else *p = xdr_zero; } /* * fattr3 * * struct fattr3 { * ftype3 type; * mode3 mode; * uint32 nlink; * uid3 uid; * gid3 gid; * size3 size; * size3 used; * specdata3 rdev; * uint64 fsid; * fileid3 fileid; * nfstime3 atime; * nfstime3 mtime; * nfstime3 ctime; * }; */ static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) { umode_t fmode; __be32 *p; p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); if (unlikely(p == NULL)) goto out_overflow; p = xdr_decode_ftype3(p, &fmode); fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; fattr->nlink = be32_to_cpup(p++); fattr->uid = be32_to_cpup(p++); fattr->gid = be32_to_cpup(p++); p = xdr_decode_size3(p, &fattr->size); p = xdr_decode_size3(p, &fattr->du.nfs3.used); p = xdr_decode_specdata3(p, &fattr->rdev); p = xdr_decode_hyper(p, &fattr->fsid.major); fattr->fsid.minor = 0; p = xdr_decode_fileid3(p, &fattr->fileid); p = xdr_decode_nfstime3(p, &fattr->atime); p = xdr_decode_nfstime3(p, &fattr->mtime); xdr_decode_nfstime3(p, &fattr->ctime); fattr->valid |= NFS_ATTR_FATTR_V3; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * post_op_attr * * union post_op_attr switch (bool attributes_follow) { * case TRUE: * fattr3 attributes; * case FALSE: * void; * }; */ static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p != xdr_zero) return decode_fattr3(xdr, fattr); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * wcc_attr * struct wcc_attr { * size3 size; * nfstime3 mtime; * nfstime3 ctime; * }; */ static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { __be32 *p; p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); if (unlikely(p == NULL)) goto out_overflow; fattr->valid |= NFS_ATTR_FATTR_PRESIZE | NFS_ATTR_FATTR_PREMTIME | NFS_ATTR_FATTR_PRECTIME; p = xdr_decode_size3(p, &fattr->pre_size); p = xdr_decode_nfstime3(p, &fattr->pre_mtime); xdr_decode_nfstime3(p, &fattr->pre_ctime); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * pre_op_attr * union pre_op_attr switch (bool attributes_follow) { * case TRUE: * wcc_attr attributes; * case FALSE: * void; * }; * * wcc_data * * struct wcc_data { * pre_op_attr before; * post_op_attr after; * }; */ static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p != xdr_zero) return decode_wcc_attr(xdr, fattr); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) { int error; error = decode_pre_op_attr(xdr, fattr); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, fattr); out: return error; } /* * post_op_fh3 * * union post_op_fh3 switch (bool handle_follows) { * case TRUE: * nfs_fh3 handle; * case FALSE: * void; * }; */ static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) { __be32 *p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p != xdr_zero) return decode_nfs_fh3(xdr, fh); zero_nfs_fh3(fh); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* * diropargs3 * * struct diropargs3 { * nfs_fh3 dir; * filename3 name; * }; */ static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, const char *name, u32 length) { encode_nfs_fh3(xdr, fh); encode_filename3(xdr, name, length); } /* * NFSv3 XDR encode functions * * NFSv3 argument types are defined in section 3.3 of RFC 1813: * "NFS Version 3 Protocol Specification". */ /* * 3.3.1 GETATTR3args * * struct GETATTR3args { * nfs_fh3 object; * }; */ static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_fh *fh) { encode_nfs_fh3(xdr, fh); } /* * 3.3.2 SETATTR3args * * union sattrguard3 switch (bool check) { * case TRUE: * nfstime3 obj_ctime; * case FALSE: * void; * }; * * struct SETATTR3args { * nfs_fh3 object; * sattr3 new_attributes; * sattrguard3 guard; * }; */ static void encode_sattrguard3(struct xdr_stream *xdr, const struct nfs3_sattrargs *args) { __be32 *p; if (args->guard) { p = xdr_reserve_space(xdr, 4 + 8); *p++ = xdr_one; xdr_encode_nfstime3(p, &args->guardtime); } else { p = xdr_reserve_space(xdr, 4); *p = xdr_zero; } } static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_sattrargs *args) { encode_nfs_fh3(xdr, args->fh); encode_sattr3(xdr, args->sattr); encode_sattrguard3(xdr, args); } /* * 3.3.3 LOOKUP3args * * struct LOOKUP3args { * diropargs3 what; * }; */ static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_diropargs *args) { encode_diropargs3(xdr, args->fh, args->name, args->len); } /* * 3.3.4 ACCESS3args * * struct ACCESS3args { * nfs_fh3 object; * uint32 access; * }; */ static void encode_access3args(struct xdr_stream *xdr, const struct nfs3_accessargs *args) { encode_nfs_fh3(xdr, args->fh); encode_uint32(xdr, args->access); } static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_accessargs *args) { encode_access3args(xdr, args); } /* * 3.3.5 READLINK3args * * struct READLINK3args { * nfs_fh3 symlink; * }; */ static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_readlinkargs *args) { encode_nfs_fh3(xdr, args->fh); prepare_reply_buffer(req, args->pages, args->pgbase, args->pglen, NFS3_readlinkres_sz); } /* * 3.3.6 READ3args * * struct READ3args { * nfs_fh3 file; * offset3 offset; * count3 count; * }; */ static void encode_read3args(struct xdr_stream *xdr, const struct nfs_readargs *args) { __be32 *p; encode_nfs_fh3(xdr, args->fh); p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); } static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_readargs *args) { encode_read3args(xdr, args); prepare_reply_buffer(req, args->pages, args->pgbase, args->count, NFS3_readres_sz); req->rq_rcv_buf.flags |= XDRBUF_READ; } /* * 3.3.7 WRITE3args * * enum stable_how { * UNSTABLE = 0, * DATA_SYNC = 1, * FILE_SYNC = 2 * }; * * struct WRITE3args { * nfs_fh3 file; * offset3 offset; * count3 count; * stable_how stable; * opaque data<>; * }; */ static void encode_write3args(struct xdr_stream *xdr, const struct nfs_writeargs *args) { __be32 *p; encode_nfs_fh3(xdr, args->fh); p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); p = xdr_encode_hyper(p, args->offset); *p++ = cpu_to_be32(args->count); *p++ = cpu_to_be32(args->stable); *p = cpu_to_be32(args->count); xdr_write_pages(xdr, args->pages, args->pgbase, args->count); } static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_writeargs *args) { encode_write3args(xdr, args); xdr->buf->flags |= XDRBUF_WRITE; } /* * 3.3.8 CREATE3args * * enum createmode3 { * UNCHECKED = 0, * GUARDED = 1, * EXCLUSIVE = 2 * }; * * union createhow3 switch (createmode3 mode) { * case UNCHECKED: * case GUARDED: * sattr3 obj_attributes; * case EXCLUSIVE: * createverf3 verf; * }; * * struct CREATE3args { * diropargs3 where; * createhow3 how; * }; */ static void encode_createhow3(struct xdr_stream *xdr, const struct nfs3_createargs *args) { encode_uint32(xdr, args->createmode); switch (args->createmode) { case NFS3_CREATE_UNCHECKED: case NFS3_CREATE_GUARDED: encode_sattr3(xdr, args->sattr); break; case NFS3_CREATE_EXCLUSIVE: encode_createverf3(xdr, args->verifier); break; default: BUG(); } } static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_createargs *args) { encode_diropargs3(xdr, args->fh, args->name, args->len); encode_createhow3(xdr, args); } /* * 3.3.9 MKDIR3args * * struct MKDIR3args { * diropargs3 where; * sattr3 attributes; * }; */ static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_mkdirargs *args) { encode_diropargs3(xdr, args->fh, args->name, args->len); encode_sattr3(xdr, args->sattr); } /* * 3.3.10 SYMLINK3args * * struct symlinkdata3 { * sattr3 symlink_attributes; * nfspath3 symlink_data; * }; * * struct SYMLINK3args { * diropargs3 where; * symlinkdata3 symlink; * }; */ static void encode_symlinkdata3(struct xdr_stream *xdr, const struct nfs3_symlinkargs *args) { encode_sattr3(xdr, args->sattr); encode_nfspath3(xdr, args->pages, args->pathlen); } static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_symlinkargs *args) { encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); encode_symlinkdata3(xdr, args); } /* * 3.3.11 MKNOD3args * * struct devicedata3 { * sattr3 dev_attributes; * specdata3 spec; * }; * * union mknoddata3 switch (ftype3 type) { * case NF3CHR: * case NF3BLK: * devicedata3 device; * case NF3SOCK: * case NF3FIFO: * sattr3 pipe_attributes; * default: * void; * }; * * struct MKNOD3args { * diropargs3 where; * mknoddata3 what; * }; */ static void encode_devicedata3(struct xdr_stream *xdr, const struct nfs3_mknodargs *args) { encode_sattr3(xdr, args->sattr); encode_specdata3(xdr, args->rdev); } static void encode_mknoddata3(struct xdr_stream *xdr, const struct nfs3_mknodargs *args) { encode_ftype3(xdr, args->type); switch (args->type) { case NF3CHR: case NF3BLK: encode_devicedata3(xdr, args); break; case NF3SOCK: case NF3FIFO: encode_sattr3(xdr, args->sattr); break; case NF3REG: case NF3DIR: break; default: BUG(); } } static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_mknodargs *args) { encode_diropargs3(xdr, args->fh, args->name, args->len); encode_mknoddata3(xdr, args); } /* * 3.3.12 REMOVE3args * * struct REMOVE3args { * diropargs3 object; * }; */ static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_removeargs *args) { encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); } /* * 3.3.14 RENAME3args * * struct RENAME3args { * diropargs3 from; * diropargs3 to; * }; */ static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_renameargs *args) { const struct qstr *old = args->old_name; const struct qstr *new = args->new_name; encode_diropargs3(xdr, args->old_dir, old->name, old->len); encode_diropargs3(xdr, args->new_dir, new->name, new->len); } /* * 3.3.15 LINK3args * * struct LINK3args { * nfs_fh3 file; * diropargs3 link; * }; */ static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_linkargs *args) { encode_nfs_fh3(xdr, args->fromfh); encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); } /* * 3.3.16 READDIR3args * * struct READDIR3args { * nfs_fh3 dir; * cookie3 cookie; * cookieverf3 cookieverf; * count3 count; * }; */ static void encode_readdir3args(struct xdr_stream *xdr, const struct nfs3_readdirargs *args) { __be32 *p; encode_nfs_fh3(xdr, args->fh); p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); p = xdr_encode_cookie3(p, args->cookie); p = xdr_encode_cookieverf3(p, args->verf); *p = cpu_to_be32(args->count); } static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_readdirargs *args) { encode_readdir3args(xdr, args); prepare_reply_buffer(req, args->pages, 0, args->count, NFS3_readdirres_sz); } /* * 3.3.17 READDIRPLUS3args * * struct READDIRPLUS3args { * nfs_fh3 dir; * cookie3 cookie; * cookieverf3 cookieverf; * count3 dircount; * count3 maxcount; * }; */ static void encode_readdirplus3args(struct xdr_stream *xdr, const struct nfs3_readdirargs *args) { __be32 *p; encode_nfs_fh3(xdr, args->fh); p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); p = xdr_encode_cookie3(p, args->cookie); p = xdr_encode_cookieverf3(p, args->verf); /* * readdirplus: need dircount + buffer size. * We just make sure we make dircount big enough */ *p++ = cpu_to_be32(args->count >> 3); *p = cpu_to_be32(args->count); } static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_readdirargs *args) { encode_readdirplus3args(xdr, args); prepare_reply_buffer(req, args->pages, 0, args->count, NFS3_readdirres_sz); } /* * 3.3.21 COMMIT3args * * struct COMMIT3args { * nfs_fh3 file; * offset3 offset; * count3 count; * }; */ static void encode_commit3args(struct xdr_stream *xdr, const struct nfs_writeargs *args) { __be32 *p; encode_nfs_fh3(xdr, args->fh); p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); } static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs_writeargs *args) { encode_commit3args(xdr, args); } #ifdef CONFIG_NFS_V3_ACL static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_getaclargs *args) { encode_nfs_fh3(xdr, args->fh); encode_uint32(xdr, args->mask); if (args->mask & (NFS_ACL | NFS_DFACL)) prepare_reply_buffer(req, args->pages, 0, NFSACL_MAXPAGES << PAGE_SHIFT, ACL3_getaclres_sz); } static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, struct xdr_stream *xdr, const struct nfs3_setaclargs *args) { unsigned int base; int error; encode_nfs_fh3(xdr, NFS_FH(args->inode)); encode_uint32(xdr, args->mask); if (args->npages != 0) xdr_write_pages(xdr, args->pages, 0, args->len); base = req->rq_slen; error = nfsacl_encode(xdr->buf, base, args->inode, (args->mask & NFS_ACL) ? args->acl_access : NULL, 1, 0); BUG_ON(error < 0); error = nfsacl_encode(xdr->buf, base + error, args->inode, (args->mask & NFS_DFACL) ? args->acl_default : NULL, 1, NFS_ACL_DEFAULT); BUG_ON(error < 0); } #endif /* CONFIG_NFS_V3_ACL */ /* * NFSv3 XDR decode functions * * NFSv3 result types are defined in section 3.3 of RFC 1813: * "NFS Version 3 Protocol Specification". */ /* * 3.3.1 GETATTR3res * * struct GETATTR3resok { * fattr3 obj_attributes; * }; * * union GETATTR3res switch (nfsstat3 status) { * case NFS3_OK: * GETATTR3resok resok; * default: * void; * }; */ static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fattr *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_fattr3(xdr, result); out: return error; out_default: return nfs_stat_to_errno(status); } /* * 3.3.2 SETATTR3res * * struct SETATTR3resok { * wcc_data obj_wcc; * }; * * struct SETATTR3resfail { * wcc_data obj_wcc; * }; * * union SETATTR3res switch (nfsstat3 status) { * case NFS3_OK: * SETATTR3resok resok; * default: * SETATTR3resfail resfail; * }; */ static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fattr *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.3 LOOKUP3res * * struct LOOKUP3resok { * nfs_fh3 object; * post_op_attr obj_attributes; * post_op_attr dir_attributes; * }; * * struct LOOKUP3resfail { * post_op_attr dir_attributes; * }; * * union LOOKUP3res switch (nfsstat3 status) { * case NFS3_OK: * LOOKUP3resok resok; * default: * LOOKUP3resfail resfail; * }; */ static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_diropres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_nfs_fh3(xdr, result->fh); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->dir_attr); out: return error; out_default: error = decode_post_op_attr(xdr, result->dir_attr); if (unlikely(error)) goto out; return nfs_stat_to_errno(status); } /* * 3.3.4 ACCESS3res * * struct ACCESS3resok { * post_op_attr obj_attributes; * uint32 access; * }; * * struct ACCESS3resfail { * post_op_attr obj_attributes; * }; * * union ACCESS3res switch (nfsstat3 status) { * case NFS3_OK: * ACCESS3resok resok; * default: * ACCESS3resfail resfail; * }; */ static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_accessres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_uint32(xdr, &result->access); out: return error; out_default: return nfs_stat_to_errno(status); } /* * 3.3.5 READLINK3res * * struct READLINK3resok { * post_op_attr symlink_attributes; * nfspath3 data; * }; * * struct READLINK3resfail { * post_op_attr symlink_attributes; * }; * * union READLINK3res switch (nfsstat3 status) { * case NFS3_OK: * READLINK3resok resok; * default: * READLINK3resfail resfail; * }; */ static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fattr *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_nfspath3(xdr); out: return error; out_default: return nfs_stat_to_errno(status); } /* * 3.3.6 READ3res * * struct READ3resok { * post_op_attr file_attributes; * count3 count; * bool eof; * opaque data<>; * }; * * struct READ3resfail { * post_op_attr file_attributes; * }; * * union READ3res switch (nfsstat3 status) { * case NFS3_OK: * READ3resok resok; * default: * READ3resfail resfail; * }; */ static int decode_read3resok(struct xdr_stream *xdr, struct nfs_readres *result) { u32 eof, count, ocount, recvd; size_t hdrlen; __be32 *p; p = xdr_inline_decode(xdr, 4 + 4 + 4); if (unlikely(p == NULL)) goto out_overflow; count = be32_to_cpup(p++); eof = be32_to_cpup(p++); ocount = be32_to_cpup(p++); if (unlikely(ocount != count)) goto out_mismatch; hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; recvd = xdr->buf->len - hdrlen; if (unlikely(count > recvd)) goto out_cheating; out: xdr_read_pages(xdr, count); result->eof = eof; result->count = count; return count; out_mismatch: dprintk("NFS: READ count doesn't match length of opaque: " "count %u != ocount %u\n", count, ocount); return -EIO; out_cheating: dprintk("NFS: server cheating in read result: " "count %u > recvd %u\n", count, recvd); count = recvd; eof = 0; goto out; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_readres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_read3resok(xdr, result); out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.7 WRITE3res * * enum stable_how { * UNSTABLE = 0, * DATA_SYNC = 1, * FILE_SYNC = 2 * }; * * struct WRITE3resok { * wcc_data file_wcc; * count3 count; * stable_how committed; * writeverf3 verf; * }; * * struct WRITE3resfail { * wcc_data file_wcc; * }; * * union WRITE3res switch (nfsstat3 status) { * case NFS3_OK: * WRITE3resok resok; * default: * WRITE3resfail resfail; * }; */ static int decode_write3resok(struct xdr_stream *xdr, struct nfs_writeres *result) { __be32 *p; p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); if (unlikely(p == NULL)) goto out_overflow; result->count = be32_to_cpup(p++); result->verf->committed = be32_to_cpup(p++); if (unlikely(result->verf->committed > NFS_FILE_SYNC)) goto out_badvalue; memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); return result->count; out_badvalue: dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); return -EIO; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_writeres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_write3resok(xdr, result); out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.8 CREATE3res * * struct CREATE3resok { * post_op_fh3 obj; * post_op_attr obj_attributes; * wcc_data dir_wcc; * }; * * struct CREATE3resfail { * wcc_data dir_wcc; * }; * * union CREATE3res switch (nfsstat3 status) { * case NFS3_OK: * CREATE3resok resok; * default: * CREATE3resfail resfail; * }; */ static int decode_create3resok(struct xdr_stream *xdr, struct nfs3_diropres *result) { int error; error = decode_post_op_fh3(xdr, result->fh); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; /* The server isn't required to return a file handle. * If it didn't, force the client to perform a LOOKUP * to determine the correct file handle and attribute * values for the new object. */ if (result->fh->size == 0) result->fattr->valid = 0; error = decode_wcc_data(xdr, result->dir_attr); out: return error; } static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_diropres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_create3resok(xdr, result); out: return error; out_default: error = decode_wcc_data(xdr, result->dir_attr); if (unlikely(error)) goto out; return nfs_stat_to_errno(status); } /* * 3.3.12 REMOVE3res * * struct REMOVE3resok { * wcc_data dir_wcc; * }; * * struct REMOVE3resfail { * wcc_data dir_wcc; * }; * * union REMOVE3res switch (nfsstat3 status) { * case NFS3_OK: * REMOVE3resok resok; * default: * REMOVE3resfail resfail; * }; */ static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_removeres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->dir_attr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.14 RENAME3res * * struct RENAME3resok { * wcc_data fromdir_wcc; * wcc_data todir_wcc; * }; * * struct RENAME3resfail { * wcc_data fromdir_wcc; * wcc_data todir_wcc; * }; * * union RENAME3res switch (nfsstat3 status) { * case NFS3_OK: * RENAME3resok resok; * default: * RENAME3resfail resfail; * }; */ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_renameres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->old_fattr); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->new_fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.15 LINK3res * * struct LINK3resok { * post_op_attr file_attributes; * wcc_data linkdir_wcc; * }; * * struct LINK3resfail { * post_op_attr file_attributes; * wcc_data linkdir_wcc; * }; * * union LINK3res switch (nfsstat3 status) { * case NFS3_OK: * LINK3resok resok; * default: * LINK3resfail resfail; * }; */ static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_linkres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->dir_attr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; out: return error; out_status: return nfs_stat_to_errno(status); } /** * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in * the local page cache * @xdr: XDR stream where entry resides * @entry: buffer to fill in with entry data * @plus: boolean indicating whether this should be a readdirplus entry * * Returns zero if successful, otherwise a negative errno value is * returned. * * This function is not invoked during READDIR reply decoding, but * rather whenever an application invokes the getdents(2) system call * on a directory already in our cache. * * 3.3.16 entry3 * * struct entry3 { * fileid3 fileid; * filename3 name; * cookie3 cookie; * fhandle3 filehandle; * post_op_attr3 attributes; * entry3 *nextentry; * }; * * 3.3.17 entryplus3 * struct entryplus3 { * fileid3 fileid; * filename3 name; * cookie3 cookie; * post_op_attr name_attributes; * post_op_fh3 name_handle; * entryplus3 *nextentry; * }; */ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, int plus) { struct nfs_entry old = *entry; __be32 *p; int error; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p == xdr_zero) { p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p == xdr_zero) return -EAGAIN; entry->eof = 1; return -EBADCOOKIE; } error = decode_fileid3(xdr, &entry->ino); if (unlikely(error)) return error; error = decode_inline_filename3(xdr, &entry->name, &entry->len); if (unlikely(error)) return error; entry->prev_cookie = entry->cookie; error = decode_cookie3(xdr, &entry->cookie); if (unlikely(error)) return error; entry->d_type = DT_UNKNOWN; if (plus) { entry->fattr->valid = 0; error = decode_post_op_attr(xdr, entry->fattr); if (unlikely(error)) return error; if (entry->fattr->valid & NFS_ATTR_FATTR_V3) entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); /* In fact, a post_op_fh3: */ p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; if (*p != xdr_zero) { error = decode_nfs_fh3(xdr, entry->fh); if (unlikely(error)) { if (error == -E2BIG) goto out_truncated; return error; } } else zero_nfs_fh3(entry->fh); } return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EAGAIN; out_truncated: dprintk("NFS: directory entry contains invalid file handle\n"); *entry = old; return -EAGAIN; } /* * 3.3.16 READDIR3res * * struct dirlist3 { * entry3 *entries; * bool eof; * }; * * struct READDIR3resok { * post_op_attr dir_attributes; * cookieverf3 cookieverf; * dirlist3 reply; * }; * * struct READDIR3resfail { * post_op_attr dir_attributes; * }; * * union READDIR3res switch (nfsstat3 status) { * case NFS3_OK: * READDIR3resok resok; * default: * READDIR3resfail resfail; * }; * * Read the directory contents into the page cache, but otherwise * don't touch them. The actual decoding is done by nfs3_decode_entry() * during subsequent nfs_readdir() calls. */ static int decode_dirlist3(struct xdr_stream *xdr) { u32 recvd, pglen; size_t hdrlen; pglen = xdr->buf->page_len; hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; recvd = xdr->buf->len - hdrlen; if (unlikely(pglen > recvd)) goto out_cheating; out: xdr_read_pages(xdr, pglen); return pglen; out_cheating: dprintk("NFS: server cheating in readdir result: " "pglen %u > recvd %u\n", pglen, recvd); pglen = recvd; goto out; } static int decode_readdir3resok(struct xdr_stream *xdr, struct nfs3_readdirres *result) { int error; error = decode_post_op_attr(xdr, result->dir_attr); if (unlikely(error)) goto out; /* XXX: do we need to check if result->verf != NULL ? */ error = decode_cookieverf3(xdr, result->verf); if (unlikely(error)) goto out; error = decode_dirlist3(xdr); out: return error; } static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_readdirres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_readdir3resok(xdr, result); out: return error; out_default: error = decode_post_op_attr(xdr, result->dir_attr); if (unlikely(error)) goto out; return nfs_stat_to_errno(status); } /* * 3.3.18 FSSTAT3res * * struct FSSTAT3resok { * post_op_attr obj_attributes; * size3 tbytes; * size3 fbytes; * size3 abytes; * size3 tfiles; * size3 ffiles; * size3 afiles; * uint32 invarsec; * }; * * struct FSSTAT3resfail { * post_op_attr obj_attributes; * }; * * union FSSTAT3res switch (nfsstat3 status) { * case NFS3_OK: * FSSTAT3resok resok; * default: * FSSTAT3resfail resfail; * }; */ static int decode_fsstat3resok(struct xdr_stream *xdr, struct nfs_fsstat *result) { __be32 *p; p = xdr_inline_decode(xdr, 8 * 6 + 4); if (unlikely(p == NULL)) goto out_overflow; p = xdr_decode_size3(p, &result->tbytes); p = xdr_decode_size3(p, &result->fbytes); p = xdr_decode_size3(p, &result->abytes); p = xdr_decode_size3(p, &result->tfiles); p = xdr_decode_size3(p, &result->ffiles); xdr_decode_size3(p, &result->afiles); /* ignore invarsec */ return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fsstat *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_fsstat3resok(xdr, result); out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.19 FSINFO3res * * struct FSINFO3resok { * post_op_attr obj_attributes; * uint32 rtmax; * uint32 rtpref; * uint32 rtmult; * uint32 wtmax; * uint32 wtpref; * uint32 wtmult; * uint32 dtpref; * size3 maxfilesize; * nfstime3 time_delta; * uint32 properties; * }; * * struct FSINFO3resfail { * post_op_attr obj_attributes; * }; * * union FSINFO3res switch (nfsstat3 status) { * case NFS3_OK: * FSINFO3resok resok; * default: * FSINFO3resfail resfail; * }; */ static int decode_fsinfo3resok(struct xdr_stream *xdr, struct nfs_fsinfo *result) { __be32 *p; p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); if (unlikely(p == NULL)) goto out_overflow; result->rtmax = be32_to_cpup(p++); result->rtpref = be32_to_cpup(p++); result->rtmult = be32_to_cpup(p++); result->wtmax = be32_to_cpup(p++); result->wtpref = be32_to_cpup(p++); result->wtmult = be32_to_cpup(p++); result->dtpref = be32_to_cpup(p++); p = xdr_decode_size3(p, &result->maxfilesize); xdr_decode_nfstime3(p, &result->time_delta); /* ignore properties */ result->lease_time = 0; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fsinfo *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_fsinfo3resok(xdr, result); out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.20 PATHCONF3res * * struct PATHCONF3resok { * post_op_attr obj_attributes; * uint32 linkmax; * uint32 name_max; * bool no_trunc; * bool chown_restricted; * bool case_insensitive; * bool case_preserving; * }; * * struct PATHCONF3resfail { * post_op_attr obj_attributes; * }; * * union PATHCONF3res switch (nfsstat3 status) { * case NFS3_OK: * PATHCONF3resok resok; * default: * PATHCONF3resfail resfail; * }; */ static int decode_pathconf3resok(struct xdr_stream *xdr, struct nfs_pathconf *result) { __be32 *p; p = xdr_inline_decode(xdr, 4 * 6); if (unlikely(p == NULL)) goto out_overflow; result->max_link = be32_to_cpup(p++); result->max_namelen = be32_to_cpup(p); /* ignore remaining fields */ return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_pathconf *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_pathconf3resok(xdr, result); out: return error; out_status: return nfs_stat_to_errno(status); } /* * 3.3.21 COMMIT3res * * struct COMMIT3resok { * wcc_data file_wcc; * writeverf3 verf; * }; * * struct COMMIT3resfail { * wcc_data file_wcc; * }; * * union COMMIT3res switch (nfsstat3 status) { * case NFS3_OK: * COMMIT3resok resok; * default: * COMMIT3resfail resfail; * }; */ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_writeres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; error = decode_wcc_data(xdr, result->fattr); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_status; error = decode_writeverf3(xdr, result->verf->verifier); out: return error; out_status: return nfs_stat_to_errno(status); } #ifdef CONFIG_NFS_V3_ACL static inline int decode_getacl3resok(struct xdr_stream *xdr, struct nfs3_getaclres *result) { struct posix_acl **acl; unsigned int *aclcnt; size_t hdrlen; int error; error = decode_post_op_attr(xdr, result->fattr); if (unlikely(error)) goto out; error = decode_uint32(xdr, &result->mask); if (unlikely(error)) goto out; error = -EINVAL; if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) goto out; hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; acl = NULL; if (result->mask & NFS_ACL) acl = &result->acl_access; aclcnt = NULL; if (result->mask & NFS_ACLCNT) aclcnt = &result->acl_access_count; error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); if (unlikely(error <= 0)) goto out; acl = NULL; if (result->mask & NFS_DFACL) acl = &result->acl_default; aclcnt = NULL; if (result->mask & NFS_DFACLCNT) aclcnt = &result->acl_default_count; error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); if (unlikely(error <= 0)) return error; error = 0; out: return error; } static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs3_getaclres *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_getacl3resok(xdr, result); out: return error; out_default: return nfs_stat_to_errno(status); } static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs_fattr *result) { enum nfs_stat status; int error; error = decode_nfsstat3(xdr, &status); if (unlikely(error)) goto out; if (status != NFS3_OK) goto out_default; error = decode_post_op_attr(xdr, result); out: return error; out_default: return nfs_stat_to_errno(status); } #endif /* CONFIG_NFS_V3_ACL */ #define PROC(proc, argtype, restype, timer) \ [NFS3PROC_##proc] = { \ .p_proc = NFS3PROC_##proc, \ .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \ .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \ .p_arglen = NFS3_##argtype##args_sz, \ .p_replen = NFS3_##restype##res_sz, \ .p_timer = timer, \ .p_statidx = NFS3PROC_##proc, \ .p_name = #proc, \ } struct rpc_procinfo nfs3_procedures[] = { PROC(GETATTR, getattr, getattr, 1), PROC(SETATTR, setattr, setattr, 0), PROC(LOOKUP, lookup, lookup, 2), PROC(ACCESS, access, access, 1), PROC(READLINK, readlink, readlink, 3), PROC(READ, read, read, 3), PROC(WRITE, write, write, 4), PROC(CREATE, create, create, 0), PROC(MKDIR, mkdir, create, 0), PROC(SYMLINK, symlink, create, 0), PROC(MKNOD, mknod, create, 0), PROC(REMOVE, remove, remove, 0), PROC(RMDIR, lookup, setattr, 0), PROC(RENAME, rename, rename, 0), PROC(LINK, link, link, 0), PROC(READDIR, readdir, readdir, 3), PROC(READDIRPLUS, readdirplus, readdir, 3), PROC(FSSTAT, getattr, fsstat, 0), PROC(FSINFO, getattr, fsinfo, 0), PROC(PATHCONF, getattr, pathconf, 0), PROC(COMMIT, commit, commit, 5), }; struct rpc_version nfs_version3 = { .number = 3, .nrprocs = ARRAY_SIZE(nfs3_procedures), .procs = nfs3_procedures }; #ifdef CONFIG_NFS_V3_ACL static struct rpc_procinfo nfs3_acl_procedures[] = { [ACLPROC3_GETACL] = { .p_proc = ACLPROC3_GETACL, .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args, .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res, .p_arglen = ACL3_getaclargs_sz, .p_replen = ACL3_getaclres_sz, .p_timer = 1, .p_name = "GETACL", }, [ACLPROC3_SETACL] = { .p_proc = ACLPROC3_SETACL, .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args, .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res, .p_arglen = ACL3_setaclargs_sz, .p_replen = ACL3_setaclres_sz, .p_timer = 0, .p_name = "SETACL", }, }; struct rpc_version nfsacl_version3 = { .number = 3, .nrprocs = sizeof(nfs3_acl_procedures)/ sizeof(nfs3_acl_procedures[0]), .procs = nfs3_acl_procedures, }; #endif /* CONFIG_NFS_V3_ACL */