| /* |
| * 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_fsstat_sz |
| #define NFS3_fsinfo_sz |
| #define NFS3_pathconf_sz |
| #define NFS3_entry_sz (NFS3_filename_sz+3) |
| #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_attrstat_sz (1+NFS3_fattr_sz) |
| #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) |
| #define NFS3_removeres_sz (NFS3_wccstat_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, |
| }; |
| |
| static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) |
| { |
| dprintk("nfs: %s: prematurely hit end of receive buffer. " |
| "Remaining buffer length is %tu words.\n", |
| func, xdr->end - xdr->p); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| |
| /* |
| * Common NFS XDR functions as inlines |
| */ |
| static inline __be32 * |
| xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) |
| { |
| if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { |
| memcpy(fh->data, p, fh->size); |
| return p + XDR_QUADLEN(fh->size); |
| } |
| return NULL; |
| } |
| |
| static inline __be32 * |
| xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh) |
| { |
| __be32 *p; |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(!p)) |
| goto out_overflow; |
| fh->size = ntohl(*p++); |
| |
| if (fh->size <= NFS3_FHSIZE) { |
| p = xdr_inline_decode(xdr, fh->size); |
| if (unlikely(!p)) |
| goto out_overflow; |
| memcpy(fh->data, p, fh->size); |
| return p + XDR_QUADLEN(fh->size); |
| } |
| return NULL; |
| |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return ERR_PTR(-EIO); |
| } |
| |
| /* |
| * Encode/decode time. |
| */ |
| static inline __be32 * |
| xdr_decode_time3(__be32 *p, struct timespec *timep) |
| { |
| timep->tv_sec = ntohl(*p++); |
| timep->tv_nsec = ntohl(*p++); |
| return p; |
| } |
| |
| static __be32 * |
| xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) |
| { |
| unsigned int type, major, minor; |
| umode_t fmode; |
| |
| type = ntohl(*p++); |
| if (type > NF3FIFO) |
| type = NF3NON; |
| fmode = nfs_type2fmt[type]; |
| fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; |
| fattr->nlink = ntohl(*p++); |
| fattr->uid = ntohl(*p++); |
| fattr->gid = ntohl(*p++); |
| p = xdr_decode_hyper(p, &fattr->size); |
| p = xdr_decode_hyper(p, &fattr->du.nfs3.used); |
| |
| /* Turn remote device info into Linux-specific dev_t */ |
| major = ntohl(*p++); |
| minor = ntohl(*p++); |
| fattr->rdev = MKDEV(major, minor); |
| if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) |
| fattr->rdev = 0; |
| |
| p = xdr_decode_hyper(p, &fattr->fsid.major); |
| fattr->fsid.minor = 0; |
| p = xdr_decode_hyper(p, &fattr->fileid); |
| p = xdr_decode_time3(p, &fattr->atime); |
| p = xdr_decode_time3(p, &fattr->mtime); |
| p = xdr_decode_time3(p, &fattr->ctime); |
| |
| /* Update the mode bits */ |
| fattr->valid |= NFS_ATTR_FATTR_V3; |
| return p; |
| } |
| |
| static inline __be32 * |
| xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) |
| { |
| p = xdr_decode_hyper(p, &fattr->pre_size); |
| p = xdr_decode_time3(p, &fattr->pre_mtime); |
| p = xdr_decode_time3(p, &fattr->pre_ctime); |
| fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
| | NFS_ATTR_FATTR_PREMTIME |
| | NFS_ATTR_FATTR_PRECTIME; |
| return p; |
| } |
| |
| static inline __be32 * |
| xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) |
| { |
| if (*p++) |
| p = xdr_decode_fattr(p, fattr); |
| return p; |
| } |
| |
| static inline __be32 * |
| xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(!p)) |
| goto out_overflow; |
| if (ntohl(*p++)) { |
| p = xdr_inline_decode(xdr, 84); |
| if (unlikely(!p)) |
| goto out_overflow; |
| p = xdr_decode_fattr(p, fattr); |
| } |
| return p; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return ERR_PTR(-EIO); |
| } |
| |
| static inline __be32 * |
| xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr) |
| { |
| if (*p++) |
| return xdr_decode_wcc_attr(p, fattr); |
| return p; |
| } |
| |
| |
| static inline __be32 * |
| xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr) |
| { |
| p = xdr_decode_pre_op_attr(p, fattr); |
| return xdr_decode_post_op_attr(p, fattr); |
| } |
| |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * cookie3 |
| * |
| * typedef uint64 cookie3 |
| */ |
| static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) |
| { |
| return xdr_encode_hyper(p, 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); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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)); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_fh *fh) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, fh); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_sattrargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fh); |
| encode_sattr3(&xdr, args->sattr); |
| encode_sattrguard3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.3 LOOKUP3args |
| * |
| * struct LOOKUP3args { |
| * diropargs3 what; |
| * }; |
| */ |
| static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_diropargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_accessargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_access3args(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.5 READLINK3args |
| * |
| * struct READLINK3args { |
| * nfs_fh3 symlink; |
| * }; |
| */ |
| static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readlinkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fh); |
| prepare_reply_buffer(req, args->pages, args->pgbase, |
| args->pglen, NFS3_readlinkres_sz); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_readargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_read3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, args->pgbase, |
| args->count, NFS3_readres_sz); |
| req->rq_rcv_buf.flags |= XDRBUF_READ; |
| return 0; |
| } |
| |
| /* |
| * 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); |
| |
| BUG_ON(args->stable > NFS_FILE_SYNC); |
| *p++ = cpu_to_be32(args->stable); |
| |
| *p = cpu_to_be32(args->count); |
| xdr_write_pages(xdr, args->pages, args->pgbase, args->count); |
| } |
| |
| static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_writeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_write3args(&xdr, args); |
| xdr.buf->flags |= XDRBUF_WRITE; |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_createargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_createhow3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.9 MKDIR3args |
| * |
| * struct MKDIR3args { |
| * diropargs3 where; |
| * sattr3 attributes; |
| * }; |
| */ |
| static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_mkdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_sattr3(&xdr, args->sattr); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_symlinkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen); |
| encode_symlinkdata3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_mknodargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_mknoddata3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.12 REMOVE3args |
| * |
| * struct REMOVE3args { |
| * diropargs3 object; |
| * }; |
| */ |
| static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_removeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len); |
| return 0; |
| } |
| |
| /* |
| * 3.3.14 RENAME3args |
| * |
| * struct RENAME3args { |
| * diropargs3 from; |
| * diropargs3 to; |
| * }; |
| */ |
| static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_renameargs *args) |
| { |
| const struct qstr *old = args->old_name; |
| const struct qstr *new = args->new_name; |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->old_dir, old->name, old->len); |
| encode_diropargs3(&xdr, args->new_dir, new->name, new->len); |
| return 0; |
| } |
| |
| /* |
| * 3.3.15 LINK3args |
| * |
| * struct LINK3args { |
| * nfs_fh3 file; |
| * diropargs3 link; |
| * }; |
| */ |
| static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_linkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fromfh); |
| encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_readdir3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, 0, |
| args->count, NFS3_readdirres_sz); |
| return 0; |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_readdirplus3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, 0, |
| args->count, NFS3_readdirres_sz); |
| return 0; |
| } |
| |
| /* |
| * Decode the result of a readdir call. |
| * We just check for syntactical correctness. |
| */ |
| static int |
| nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) |
| { |
| struct xdr_buf *rcvbuf = &req->rq_rcv_buf; |
| struct kvec *iov = rcvbuf->head; |
| struct page **page; |
| size_t hdrlen; |
| u32 recvd, pglen; |
| int status; |
| |
| status = ntohl(*p++); |
| /* Decode post_op_attrs */ |
| p = xdr_decode_post_op_attr(p, res->dir_attr); |
| if (status) |
| return nfs_stat_to_errno(status); |
| /* Decode verifier cookie */ |
| if (res->verf) { |
| res->verf[0] = *p++; |
| res->verf[1] = *p++; |
| } else { |
| p += 2; |
| } |
| |
| hdrlen = (u8 *) p - (u8 *) iov->iov_base; |
| if (iov->iov_len < hdrlen) { |
| dprintk("NFS: READDIR reply header overflowed:" |
| "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
| return -errno_NFSERR_IO; |
| } 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); |
| } |
| |
| pglen = rcvbuf->page_len; |
| recvd = rcvbuf->len - hdrlen; |
| if (pglen > recvd) |
| pglen = recvd; |
| page = rcvbuf->pages; |
| |
| return pglen; |
| } |
| |
| __be32 * |
| nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) |
| { |
| __be32 *p; |
| struct nfs_entry old = *entry; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(!p)) |
| goto out_overflow; |
| if (!ntohl(*p++)) { |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(!p)) |
| goto out_overflow; |
| if (!ntohl(*p++)) |
| return ERR_PTR(-EAGAIN); |
| entry->eof = 1; |
| return ERR_PTR(-EBADCOOKIE); |
| } |
| |
| p = xdr_inline_decode(xdr, 12); |
| if (unlikely(!p)) |
| goto out_overflow; |
| p = xdr_decode_hyper(p, &entry->ino); |
| entry->len = ntohl(*p++); |
| |
| p = xdr_inline_decode(xdr, entry->len + 8); |
| if (unlikely(!p)) |
| goto out_overflow; |
| entry->name = (const char *) p; |
| p += XDR_QUADLEN(entry->len); |
| entry->prev_cookie = entry->cookie; |
| p = xdr_decode_hyper(p, &entry->cookie); |
| |
| entry->d_type = DT_UNKNOWN; |
| if (plus) { |
| entry->fattr->valid = 0; |
| p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); |
| if (IS_ERR(p)) |
| goto out_overflow_exit; |
| 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)) |
| goto out_overflow; |
| if (*p++) { |
| p = xdr_decode_fhandle_stream(xdr, entry->fh); |
| if (IS_ERR(p)) |
| goto out_overflow_exit; |
| /* Ugh -- server reply was truncated */ |
| if (p == NULL) { |
| dprintk("NFS: FH truncated\n"); |
| *entry = old; |
| return ERR_PTR(-EAGAIN); |
| } |
| } else |
| memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); |
| } |
| |
| p = xdr_inline_peek(xdr, 8); |
| if (p != NULL) |
| entry->eof = !p[0] && p[1]; |
| else |
| entry->eof = 0; |
| |
| return p; |
| |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| out_overflow_exit: |
| return ERR_PTR(-EAGAIN); |
| } |
| |
| /* |
| * 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 int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_writeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_commit3args(&xdr, args); |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFS_V3_ACL |
| |
| static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_getaclargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| 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); |
| return 0; |
| } |
| |
| static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_setaclargs *args) |
| { |
| struct xdr_stream xdr; |
| unsigned int base; |
| int error; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| 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); |
| return 0; |
| } |
| |
| #endif /* CONFIG_NFS_V3_ACL */ |
| |
| /* |
| * NFS XDR decode functions |
| */ |
| |
| /* |
| * Decode attrstat reply. |
| */ |
| static int |
| nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
| { |
| int status; |
| |
| if ((status = ntohl(*p++))) |
| return nfs_stat_to_errno(status); |
| xdr_decode_fattr(p, fattr); |
| return 0; |
| } |
| |
| /* |
| * Decode status+wcc_data reply |
| * SATTR, REMOVE, RMDIR |
| */ |
| static int |
| nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
| { |
| int status; |
| |
| if ((status = ntohl(*p++))) |
| status = nfs_stat_to_errno(status); |
| xdr_decode_wcc_data(p, fattr); |
| return status; |
| } |
| |
| static int |
| nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) |
| { |
| return nfs3_xdr_wccstat(req, p, res->dir_attr); |
| } |
| |
| /* |
| * Decode LOOKUP reply |
| */ |
| static int |
| nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
| { |
| int status; |
| |
| if ((status = ntohl(*p++))) { |
| status = nfs_stat_to_errno(status); |
| } else { |
| if (!(p = xdr_decode_fhandle(p, res->fh))) |
| return -errno_NFSERR_IO; |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| } |
| xdr_decode_post_op_attr(p, res->dir_attr); |
| return status; |
| } |
| |
| /* |
| * Decode ACCESS reply |
| */ |
| static int |
| nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) |
| { |
| int status = ntohl(*p++); |
| |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| if (status) |
| return nfs_stat_to_errno(status); |
| res->access = ntohl(*p++); |
| return 0; |
| } |
| |
| /* |
| * Decode READLINK reply |
| */ |
| static int |
| nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
| { |
| struct xdr_buf *rcvbuf = &req->rq_rcv_buf; |
| struct kvec *iov = rcvbuf->head; |
| size_t hdrlen; |
| u32 len, recvd; |
| int status; |
| |
| status = ntohl(*p++); |
| p = xdr_decode_post_op_attr(p, fattr); |
| |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| /* Convert length of symlink */ |
| len = ntohl(*p++); |
| if (len >= rcvbuf->page_len) { |
| dprintk("nfs: server returned giant symlink!\n"); |
| return -ENAMETOOLONG; |
| } |
| |
| hdrlen = (u8 *) p - (u8 *) iov->iov_base; |
| if (iov->iov_len < hdrlen) { |
| dprintk("NFS: READLINK reply header overflowed:" |
| "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
| return -errno_NFSERR_IO; |
| } else if (iov->iov_len != hdrlen) { |
| dprintk("NFS: READLINK header is short. " |
| "iovec will be shifted.\n"); |
| xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); |
| } |
| recvd = req->rq_rcv_buf.len - hdrlen; |
| if (recvd < len) { |
| dprintk("NFS: server cheating in readlink reply: " |
| "count %u > recvd %u\n", len, recvd); |
| return -EIO; |
| } |
| |
| xdr_terminate_string(rcvbuf, len); |
| return 0; |
| } |
| |
| /* |
| * Decode READ reply |
| */ |
| static int |
| nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) |
| { |
| struct kvec *iov = req->rq_rcv_buf.head; |
| size_t hdrlen; |
| u32 count, ocount, recvd; |
| int status; |
| |
| status = ntohl(*p++); |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| /* Decode reply count and EOF flag. NFSv3 is somewhat redundant |
| * in that it puts the count both in the res struct and in the |
| * opaque data count. */ |
| count = ntohl(*p++); |
| res->eof = ntohl(*p++); |
| ocount = ntohl(*p++); |
| |
| if (ocount != count) { |
| dprintk("NFS: READ count doesn't match RPC opaque count.\n"); |
| return -errno_NFSERR_IO; |
| } |
| |
| hdrlen = (u8 *) p - (u8 *) iov->iov_base; |
| if (iov->iov_len < hdrlen) { |
| dprintk("NFS: READ reply header overflowed:" |
| "length %Zu > %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_rcv_buf.len - hdrlen; |
| if (count > recvd) { |
| dprintk("NFS: server cheating in read reply: " |
| "count %u > recvd %u\n", count, recvd); |
| count = recvd; |
| res->eof = 0; |
| } |
| |
| if (count < res->count) |
| res->count = count; |
| |
| return count; |
| } |
| |
| /* |
| * Decode WRITE response |
| */ |
| static int |
| nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| p = xdr_decode_wcc_data(p, res->fattr); |
| |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| res->count = ntohl(*p++); |
| res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); |
| res->verf->verifier[0] = *p++; |
| res->verf->verifier[1] = *p++; |
| |
| return res->count; |
| } |
| |
| /* |
| * Decode a CREATE response |
| */ |
| static int |
| nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| if (status == 0) { |
| if (*p++) { |
| if (!(p = xdr_decode_fhandle(p, res->fh))) |
| return -errno_NFSERR_IO; |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| } else { |
| memset(res->fh, 0, sizeof(*res->fh)); |
| /* Do decode post_op_attr but set it to NULL */ |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| res->fattr->valid = 0; |
| } |
| } else { |
| status = nfs_stat_to_errno(status); |
| } |
| p = xdr_decode_wcc_data(p, res->dir_attr); |
| return status; |
| } |
| |
| /* |
| * Decode RENAME reply |
| */ |
| static int |
| nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) |
| { |
| int status; |
| |
| if ((status = ntohl(*p++)) != 0) |
| status = nfs_stat_to_errno(status); |
| p = xdr_decode_wcc_data(p, res->old_fattr); |
| p = xdr_decode_wcc_data(p, res->new_fattr); |
| return status; |
| } |
| |
| /* |
| * Decode LINK reply |
| */ |
| static int |
| nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) |
| { |
| int status; |
| |
| if ((status = ntohl(*p++)) != 0) |
| status = nfs_stat_to_errno(status); |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| p = xdr_decode_wcc_data(p, res->dir_attr); |
| return status; |
| } |
| |
| /* |
| * Decode FSSTAT reply |
| */ |
| static int |
| nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| p = xdr_decode_hyper(p, &res->tbytes); |
| p = xdr_decode_hyper(p, &res->fbytes); |
| p = xdr_decode_hyper(p, &res->abytes); |
| p = xdr_decode_hyper(p, &res->tfiles); |
| p = xdr_decode_hyper(p, &res->ffiles); |
| p = xdr_decode_hyper(p, &res->afiles); |
| |
| /* ignore invarsec */ |
| return 0; |
| } |
| |
| /* |
| * Decode FSINFO reply |
| */ |
| static int |
| nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| res->rtmax = ntohl(*p++); |
| res->rtpref = ntohl(*p++); |
| res->rtmult = ntohl(*p++); |
| res->wtmax = ntohl(*p++); |
| res->wtpref = ntohl(*p++); |
| res->wtmult = ntohl(*p++); |
| res->dtpref = ntohl(*p++); |
| p = xdr_decode_hyper(p, &res->maxfilesize); |
| p = xdr_decode_time3(p, &res->time_delta); |
| |
| /* ignore properties */ |
| res->lease_time = 0; |
| return 0; |
| } |
| |
| /* |
| * Decode PATHCONF reply |
| */ |
| static int |
| nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| res->max_link = ntohl(*p++); |
| res->max_namelen = ntohl(*p++); |
| |
| /* ignore remaining fields */ |
| return 0; |
| } |
| |
| /* |
| * Decode COMMIT reply |
| */ |
| static int |
| nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
| { |
| int status; |
| |
| status = ntohl(*p++); |
| p = xdr_decode_wcc_data(p, res->fattr); |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| |
| res->verf->verifier[0] = *p++; |
| res->verf->verifier[1] = *p++; |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFS_V3_ACL |
| /* |
| * Decode GETACL reply |
| */ |
| static int |
| nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_getaclres *res) |
| { |
| struct xdr_buf *buf = &req->rq_rcv_buf; |
| int status = ntohl(*p++); |
| struct posix_acl **acl; |
| unsigned int *aclcnt; |
| int err, base; |
| |
| if (status != 0) |
| return nfs_stat_to_errno(status); |
| p = xdr_decode_post_op_attr(p, res->fattr); |
| res->mask = ntohl(*p++); |
| if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) |
| return -EINVAL; |
| base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base; |
| |
| acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; |
| aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; |
| err = nfsacl_decode(buf, base, aclcnt, acl); |
| |
| acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; |
| aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; |
| if (err > 0) |
| err = nfsacl_decode(buf, base + err, aclcnt, acl); |
| return (err > 0) ? 0 : err; |
| } |
| |
| /* |
| * Decode setacl reply. |
| */ |
| static int |
| nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
| { |
| int status = ntohl(*p++); |
| |
| if (status) |
| return nfs_stat_to_errno(status); |
| xdr_decode_post_op_attr(p, fattr); |
| return 0; |
| } |
| #endif /* CONFIG_NFS_V3_ACL */ |
| |
| #define PROC(proc, argtype, restype, timer) \ |
| [NFS3PROC_##proc] = { \ |
| .p_proc = NFS3PROC_##proc, \ |
| .p_encode = (kxdrproc_t)nfs3_xdr_enc_##argtype##3args, \ |
| .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ |
| .p_arglen = NFS3_##argtype##args_sz, \ |
| .p_replen = NFS3_##restype##_sz, \ |
| .p_timer = timer, \ |
| .p_statidx = NFS3PROC_##proc, \ |
| .p_name = #proc, \ |
| } |
| |
| struct rpc_procinfo nfs3_procedures[] = { |
| PROC(GETATTR, getattr, attrstat, 1), |
| PROC(SETATTR, setattr, wccstat, 0), |
| PROC(LOOKUP, lookup, lookupres, 2), |
| PROC(ACCESS, access, accessres, 1), |
| PROC(READLINK, readlink, readlinkres, 3), |
| PROC(READ, read, readres, 3), |
| PROC(WRITE, write, writeres, 4), |
| PROC(CREATE, create, createres, 0), |
| PROC(MKDIR, mkdir, createres, 0), |
| PROC(SYMLINK, symlink, createres, 0), |
| PROC(MKNOD, mknod, createres, 0), |
| PROC(REMOVE, remove, removeres, 0), |
| PROC(RMDIR, lookup, wccstat, 0), |
| PROC(RENAME, rename, renameres, 0), |
| PROC(LINK, link, linkres, 0), |
| PROC(READDIR, readdir, readdirres, 3), |
| PROC(READDIRPLUS, readdirplus, readdirres, 3), |
| PROC(FSSTAT, getattr, fsstatres, 0), |
| PROC(FSINFO, getattr, fsinfores, 0), |
| PROC(PATHCONF, getattr, pathconfres, 0), |
| PROC(COMMIT, commit, commitres, 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 = (kxdrproc_t)nfs3_xdr_enc_getacl3args, |
| .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, |
| .p_arglen = ACL3_getaclargs_sz, |
| .p_replen = ACL3_getaclres_sz, |
| .p_timer = 1, |
| .p_name = "GETACL", |
| }, |
| [ACLPROC3_SETACL] = { |
| .p_proc = ACLPROC3_SETACL, |
| .p_encode = (kxdrproc_t)nfs3_xdr_enc_setacl3args, |
| .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, |
| .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 */ |