2631 lines
56 KiB
C
2631 lines
56 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/nfs/nfs3xdr.c
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*
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* XDR functions to encode/decode NFSv3 RPC arguments and results.
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*
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* Copyright (C) 1996, 1997 Olaf Kirch
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*/
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#include <linux/param.h>
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#include <linux/time.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/in.h>
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#include <linux/pagemap.h>
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#include <linux/proc_fs.h>
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#include <linux/kdev_t.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/nfs.h>
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#include <linux/nfs3.h>
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#include <linux/nfs_fs.h>
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#include <linux/nfsacl.h>
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#include "internal.h"
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#define NFSDBG_FACILITY NFSDBG_XDR
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/* Mapping from NFS error code to "errno" error code. */
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#define errno_NFSERR_IO EIO
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/*
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* Declare the space requirements for NFS arguments and replies as
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* number of 32bit-words
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*/
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#define NFS3_fhandle_sz (1+16)
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#define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
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#define NFS3_post_op_fh_sz (1+NFS3_fh_sz)
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#define NFS3_sattr_sz (15)
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#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
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#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
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#define NFS3_fattr_sz (21)
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#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
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#define NFS3_wcc_attr_sz (6)
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#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
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#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
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#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
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#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
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#define NFS3_getattrargs_sz (NFS3_fh_sz)
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#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
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#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
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#define NFS3_accessargs_sz (NFS3_fh_sz+1)
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#define NFS3_readlinkargs_sz (NFS3_fh_sz)
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#define NFS3_readargs_sz (NFS3_fh_sz+3)
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#define NFS3_writeargs_sz (NFS3_fh_sz+5)
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#define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
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#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
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#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
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#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
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#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
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#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
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#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
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#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
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#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
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#define NFS3_commitargs_sz (NFS3_fh_sz+3)
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#define NFS3_getattrres_sz (1+NFS3_fattr_sz)
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#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
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#define NFS3_removeres_sz (NFS3_setattrres_sz)
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#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
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#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
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#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
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#define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
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#define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
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#define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
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#define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
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#define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
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#define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
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#define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
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#define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
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#define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
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#define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
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#define ACL3_getaclargs_sz (NFS3_fh_sz+1)
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#define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
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XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
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#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
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XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
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#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
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static int nfs3_stat_to_errno(enum nfs_stat);
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/*
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* Map file type to S_IFMT bits
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*/
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static const umode_t nfs_type2fmt[] = {
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[NF3BAD] = 0,
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[NF3REG] = S_IFREG,
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[NF3DIR] = S_IFDIR,
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[NF3BLK] = S_IFBLK,
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[NF3CHR] = S_IFCHR,
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[NF3LNK] = S_IFLNK,
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[NF3SOCK] = S_IFSOCK,
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[NF3FIFO] = S_IFIFO,
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};
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/*
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* While encoding arguments, set up the reply buffer in advance to
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* receive reply data directly into the page cache.
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*/
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static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
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unsigned int base, unsigned int len,
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unsigned int bufsize)
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{
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struct rpc_auth *auth = req->rq_cred->cr_auth;
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unsigned int replen;
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replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
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xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
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}
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/*
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* Handle decode buffer overflows out-of-line.
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*/
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static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
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{
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dprintk("NFS: %s prematurely hit the end of our receive buffer. "
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"Remaining buffer length is %tu words.\n",
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func, xdr->end - xdr->p);
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}
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/*
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* Encode/decode NFSv3 basic data types
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*
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* Basic NFSv3 data types are defined in section 2.5 of RFC 1813:
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* "NFS Version 3 Protocol Specification".
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*
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* Not all basic data types have their own encoding and decoding
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* functions. For run-time efficiency, some data types are encoded
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* or decoded inline.
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*/
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static void encode_uint32(struct xdr_stream *xdr, u32 value)
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{
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__be32 *p = xdr_reserve_space(xdr, 4);
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*p = cpu_to_be32(value);
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}
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static int decode_uint32(struct xdr_stream *xdr, u32 *value)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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*value = be32_to_cpup(p);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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static int decode_uint64(struct xdr_stream *xdr, u64 *value)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, 8);
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if (unlikely(p == NULL))
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goto out_overflow;
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xdr_decode_hyper(p, value);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* fileid3
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*
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* typedef uint64 fileid3;
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*/
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static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
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{
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return xdr_decode_hyper(p, fileid);
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}
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static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
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{
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return decode_uint64(xdr, fileid);
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}
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/*
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* filename3
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*
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* typedef string filename3<>;
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*/
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static void encode_filename3(struct xdr_stream *xdr,
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const char *name, u32 length)
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{
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__be32 *p;
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WARN_ON_ONCE(length > NFS3_MAXNAMLEN);
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p = xdr_reserve_space(xdr, 4 + length);
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xdr_encode_opaque(p, name, length);
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}
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static int decode_inline_filename3(struct xdr_stream *xdr,
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const char **name, u32 *length)
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{
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__be32 *p;
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u32 count;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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count = be32_to_cpup(p);
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if (count > NFS3_MAXNAMLEN)
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goto out_nametoolong;
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p = xdr_inline_decode(xdr, count);
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if (unlikely(p == NULL))
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goto out_overflow;
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*name = (const char *)p;
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*length = count;
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return 0;
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out_nametoolong:
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dprintk("NFS: returned filename too long: %u\n", count);
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return -ENAMETOOLONG;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* nfspath3
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*
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* typedef string nfspath3<>;
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*/
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static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
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const u32 length)
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{
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encode_uint32(xdr, length);
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xdr_write_pages(xdr, pages, 0, length);
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}
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static int decode_nfspath3(struct xdr_stream *xdr)
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{
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u32 recvd, count;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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count = be32_to_cpup(p);
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if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
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goto out_nametoolong;
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recvd = xdr_read_pages(xdr, count);
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if (unlikely(count > recvd))
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goto out_cheating;
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xdr_terminate_string(xdr->buf, count);
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return 0;
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out_nametoolong:
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dprintk("NFS: returned pathname too long: %u\n", count);
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return -ENAMETOOLONG;
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out_cheating:
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dprintk("NFS: server cheating in pathname result: "
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"count %u > recvd %u\n", count, recvd);
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return -EIO;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* cookie3
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*
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* typedef uint64 cookie3
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*/
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static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
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{
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return xdr_encode_hyper(p, cookie);
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}
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static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
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{
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return decode_uint64(xdr, cookie);
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}
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/*
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* cookieverf3
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*
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* typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
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*/
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static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
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{
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memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
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return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
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}
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static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
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if (unlikely(p == NULL))
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goto out_overflow;
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memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* createverf3
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*
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* typedef opaque createverf3[NFS3_CREATEVERFSIZE];
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*/
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static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
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memcpy(p, verifier, NFS3_CREATEVERFSIZE);
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}
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static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
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if (unlikely(p == NULL))
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goto out_overflow;
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memcpy(verifier->data, p, NFS3_WRITEVERFSIZE);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* size3
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*
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* typedef uint64 size3;
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*/
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static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
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{
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return xdr_decode_hyper(p, size);
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}
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/*
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* nfsstat3
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*
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* enum nfsstat3 {
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* NFS3_OK = 0,
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* ...
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* }
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*/
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#define NFS3_OK NFS_OK
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static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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*status = be32_to_cpup(p);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* ftype3
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*
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* enum ftype3 {
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* NF3REG = 1,
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* NF3DIR = 2,
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* NF3BLK = 3,
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* NF3CHR = 4,
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* NF3LNK = 5,
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* NF3SOCK = 6,
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* NF3FIFO = 7
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* };
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*/
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static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
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{
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encode_uint32(xdr, type);
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}
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static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
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{
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u32 type;
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type = be32_to_cpup(p++);
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if (type > NF3FIFO)
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type = NF3NON;
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*mode = nfs_type2fmt[type];
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return p;
|
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}
|
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|
|
/*
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* specdata3
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*
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* struct specdata3 {
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* uint32 specdata1;
|
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* uint32 specdata2;
|
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* };
|
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*/
|
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static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
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{
|
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__be32 *p;
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|
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p = xdr_reserve_space(xdr, 8);
|
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*p++ = cpu_to_be32(MAJOR(rdev));
|
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*p = cpu_to_be32(MINOR(rdev));
|
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}
|
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|
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static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
|
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{
|
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unsigned int major, minor;
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|
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major = be32_to_cpup(p++);
|
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minor = be32_to_cpup(p++);
|
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*rdev = MKDEV(major, minor);
|
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if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
|
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*rdev = 0;
|
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return p;
|
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}
|
|
|
|
/*
|
|
* nfs_fh3
|
|
*
|
|
* struct nfs_fh3 {
|
|
* opaque data<NFS3_FHSIZE>;
|
|
* };
|
|
*/
|
|
static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
|
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{
|
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__be32 *p;
|
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|
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WARN_ON_ONCE(fh->size > NFS3_FHSIZE);
|
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p = xdr_reserve_space(xdr, 4 + fh->size);
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xdr_encode_opaque(p, fh->data, fh->size);
|
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}
|
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|
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static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
|
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{
|
|
u32 length;
|
|
__be32 *p;
|
|
|
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p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
goto out_overflow;
|
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length = be32_to_cpup(p++);
|
|
if (unlikely(length > NFS3_FHSIZE))
|
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goto out_toobig;
|
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p = xdr_inline_decode(xdr, length);
|
|
if (unlikely(p == NULL))
|
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goto out_overflow;
|
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fh->size = length;
|
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memcpy(fh->data, p, length);
|
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return 0;
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out_toobig:
|
|
dprintk("NFS: file handle size (%u) too big\n", length);
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return -E2BIG;
|
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out_overflow:
|
|
print_overflow_msg(__func__, xdr);
|
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return -EIO;
|
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}
|
|
|
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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)
|
|
{
|
|
struct timespec ts;
|
|
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(from_kuid(&init_user_ns, attr->ia_uid));
|
|
} else
|
|
*p++ = xdr_zero;
|
|
|
|
if (attr->ia_valid & ATTR_GID) {
|
|
*p++ = xdr_one;
|
|
*p++ = cpu_to_be32(from_kgid(&init_user_ns, 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) {
|
|
struct timespec ts;
|
|
*p++ = xdr_two;
|
|
ts = timespec64_to_timespec(attr->ia_atime);
|
|
p = xdr_encode_nfstime3(p, &ts);
|
|
} else if (attr->ia_valid & ATTR_ATIME) {
|
|
*p++ = xdr_one;
|
|
} else
|
|
*p++ = xdr_zero;
|
|
|
|
if (attr->ia_valid & ATTR_MTIME_SET) {
|
|
*p++ = xdr_two;
|
|
ts = timespec64_to_timespec(attr->ia_mtime);
|
|
xdr_encode_nfstime3(p, &ts);
|
|
} 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 = make_kuid(&init_user_ns, be32_to_cpup(p++));
|
|
if (!uid_valid(fattr->uid))
|
|
goto out_uid;
|
|
fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
|
|
if (!gid_valid(fattr->gid))
|
|
goto out_gid;
|
|
|
|
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->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
|
|
|
|
fattr->valid |= NFS_ATTR_FATTR_V3;
|
|
return 0;
|
|
out_uid:
|
|
dprintk("NFS: returned invalid uid\n");
|
|
return -EINVAL;
|
|
out_gid:
|
|
dprintk("NFS: returned invalid gid\n");
|
|
return -EINVAL;
|
|
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_PRECHANGE
|
|
| 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);
|
|
fattr->pre_change_attr = nfs_timespec_to_change_attr(&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 void *data)
|
|
{
|
|
const struct nfs_fh *fh = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_sattrargs *args = data;
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_diropargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_accessargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_readlinkargs *args = data;
|
|
|
|
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_pgio_args *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 void *data)
|
|
{
|
|
const struct nfs_pgio_args *args = data;
|
|
|
|
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_pgio_args *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 void *data)
|
|
{
|
|
const struct nfs_pgio_args *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_createargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_mkdirargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_symlinkargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_symlinkargs *args = data;
|
|
|
|
encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
|
|
encode_symlinkdata3(xdr, args);
|
|
xdr->buf->flags |= XDRBUF_WRITE;
|
|
}
|
|
|
|
/*
|
|
* 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 void *data)
|
|
{
|
|
const struct nfs3_mknodargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs_removeargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs_renameargs *args = data;
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_linkargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_readdirargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_readdirargs *args = data;
|
|
|
|
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_commitargs *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 void *data)
|
|
{
|
|
const struct nfs_commitargs *args = data;
|
|
|
|
encode_commit3args(xdr, args);
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
|
|
static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs3_getaclargs *args = data;
|
|
|
|
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 void *data)
|
|
{
|
|
const struct nfs3_setaclargs *args = data;
|
|
unsigned int base;
|
|
int error;
|
|
|
|
encode_nfs_fh3(xdr, NFS_FH(args->inode));
|
|
encode_uint32(xdr, args->mask);
|
|
|
|
base = req->rq_slen;
|
|
if (args->npages != 0)
|
|
xdr_write_pages(xdr, args->pages, 0, args->len);
|
|
else
|
|
xdr_reserve_space(xdr, args->len);
|
|
|
|
error = nfsacl_encode(xdr->buf, base, args->inode,
|
|
(args->mask & NFS_ACL) ?
|
|
args->acl_access : NULL, 1, 0);
|
|
/* FIXME: this is just broken */
|
|
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,
|
|
void *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 nfs3_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,
|
|
void *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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs3_diropres *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs3_accessres *result = data;
|
|
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 nfs3_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,
|
|
void *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 nfs3_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_pgio_res *result)
|
|
{
|
|
u32 eof, count, ocount, recvd;
|
|
__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;
|
|
recvd = xdr_read_pages(xdr, count);
|
|
if (unlikely(count > recvd))
|
|
goto out_cheating;
|
|
out:
|
|
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,
|
|
void *data)
|
|
{
|
|
struct nfs_pgio_res *result = data;
|
|
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;
|
|
result->op_status = status;
|
|
if (status != NFS3_OK)
|
|
goto out_status;
|
|
error = decode_read3resok(xdr, result);
|
|
out:
|
|
return error;
|
|
out_status:
|
|
return nfs3_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_pgio_res *result)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_inline_decode(xdr, 4 + 4);
|
|
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;
|
|
if (decode_writeverf3(xdr, &result->verf->verifier))
|
|
goto out_eio;
|
|
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);
|
|
out_eio:
|
|
return -EIO;
|
|
}
|
|
|
|
static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs_pgio_res *result = data;
|
|
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;
|
|
result->op_status = status;
|
|
if (status != NFS3_OK)
|
|
goto out_status;
|
|
error = decode_write3resok(xdr, result);
|
|
out:
|
|
return error;
|
|
out_status:
|
|
return nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs3_diropres *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_removeres *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_renameres *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs3_linkres *result = data;
|
|
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 nfs3_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,
|
|
bool plus)
|
|
{
|
|
struct nfs_entry old = *entry;
|
|
__be32 *p;
|
|
int error;
|
|
u64 new_cookie;
|
|
|
|
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;
|
|
|
|
error = decode_cookie3(xdr, &new_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);
|
|
|
|
if (entry->fattr->fileid != entry->ino) {
|
|
entry->fattr->mounted_on_fileid = entry->ino;
|
|
entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
entry->prev_cookie = entry->cookie;
|
|
entry->cookie = new_cookie;
|
|
|
|
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)
|
|
{
|
|
return xdr_read_pages(xdr, xdr->buf->page_len);
|
|
}
|
|
|
|
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,
|
|
void *data)
|
|
{
|
|
struct nfs3_readdirres *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_fsstat *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_fsinfo *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_pathconf *result = data;
|
|
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 nfs3_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,
|
|
void *data)
|
|
{
|
|
struct nfs_commitres *result = data;
|
|
struct nfs_writeverf *verf = result->verf;
|
|
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;
|
|
result->op_status = status;
|
|
if (status != NFS3_OK)
|
|
goto out_status;
|
|
error = decode_writeverf3(xdr, &verf->verifier);
|
|
if (!error)
|
|
verf->committed = NFS_FILE_SYNC;
|
|
out:
|
|
return error;
|
|
out_status:
|
|
return nfs3_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 = xdr_stream_pos(xdr);
|
|
|
|
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,
|
|
void *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 nfs3_stat_to_errno(status);
|
|
}
|
|
|
|
static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
void *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 nfs3_stat_to_errno(status);
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V3_ACL */
|
|
|
|
|
|
/*
|
|
* We need to translate between nfs status return values and
|
|
* the local errno values which may not be the same.
|
|
*/
|
|
static const struct {
|
|
int stat;
|
|
int errno;
|
|
} nfs_errtbl[] = {
|
|
{ NFS_OK, 0 },
|
|
{ NFSERR_PERM, -EPERM },
|
|
{ NFSERR_NOENT, -ENOENT },
|
|
{ NFSERR_IO, -errno_NFSERR_IO},
|
|
{ NFSERR_NXIO, -ENXIO },
|
|
/* { NFSERR_EAGAIN, -EAGAIN }, */
|
|
{ NFSERR_ACCES, -EACCES },
|
|
{ NFSERR_EXIST, -EEXIST },
|
|
{ NFSERR_XDEV, -EXDEV },
|
|
{ NFSERR_NODEV, -ENODEV },
|
|
{ NFSERR_NOTDIR, -ENOTDIR },
|
|
{ NFSERR_ISDIR, -EISDIR },
|
|
{ NFSERR_INVAL, -EINVAL },
|
|
{ NFSERR_FBIG, -EFBIG },
|
|
{ NFSERR_NOSPC, -ENOSPC },
|
|
{ NFSERR_ROFS, -EROFS },
|
|
{ NFSERR_MLINK, -EMLINK },
|
|
{ NFSERR_NAMETOOLONG, -ENAMETOOLONG },
|
|
{ NFSERR_NOTEMPTY, -ENOTEMPTY },
|
|
{ NFSERR_DQUOT, -EDQUOT },
|
|
{ NFSERR_STALE, -ESTALE },
|
|
{ NFSERR_REMOTE, -EREMOTE },
|
|
#ifdef EWFLUSH
|
|
{ NFSERR_WFLUSH, -EWFLUSH },
|
|
#endif
|
|
{ NFSERR_BADHANDLE, -EBADHANDLE },
|
|
{ NFSERR_NOT_SYNC, -ENOTSYNC },
|
|
{ NFSERR_BAD_COOKIE, -EBADCOOKIE },
|
|
{ NFSERR_NOTSUPP, -ENOTSUPP },
|
|
{ NFSERR_TOOSMALL, -ETOOSMALL },
|
|
{ NFSERR_SERVERFAULT, -EREMOTEIO },
|
|
{ NFSERR_BADTYPE, -EBADTYPE },
|
|
{ NFSERR_JUKEBOX, -EJUKEBOX },
|
|
{ -1, -EIO }
|
|
};
|
|
|
|
/**
|
|
* nfs3_stat_to_errno - convert an NFS status code to a local errno
|
|
* @status: NFS status code to convert
|
|
*
|
|
* Returns a local errno value, or -EIO if the NFS status code is
|
|
* not recognized. This function is used jointly by NFSv2 and NFSv3.
|
|
*/
|
|
static int nfs3_stat_to_errno(enum nfs_stat status)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
|
if (nfs_errtbl[i].stat == (int)status)
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
dprintk("NFS: Unrecognized nfs status value: %u\n", status);
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
|
|
|
|
#define PROC(proc, argtype, restype, timer) \
|
|
[NFS3PROC_##proc] = { \
|
|
.p_proc = NFS3PROC_##proc, \
|
|
.p_encode = nfs3_xdr_enc_##argtype##3args, \
|
|
.p_decode = 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, \
|
|
}
|
|
|
|
const 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),
|
|
};
|
|
|
|
static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)];
|
|
const struct rpc_version nfs_version3 = {
|
|
.number = 3,
|
|
.nrprocs = ARRAY_SIZE(nfs3_procedures),
|
|
.procs = nfs3_procedures,
|
|
.counts = nfs_version3_counts,
|
|
};
|
|
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
static const struct rpc_procinfo nfs3_acl_procedures[] = {
|
|
[ACLPROC3_GETACL] = {
|
|
.p_proc = ACLPROC3_GETACL,
|
|
.p_encode = nfs3_xdr_enc_getacl3args,
|
|
.p_decode = 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 = nfs3_xdr_enc_setacl3args,
|
|
.p_decode = nfs3_xdr_dec_setacl3res,
|
|
.p_arglen = ACL3_setaclargs_sz,
|
|
.p_replen = ACL3_setaclres_sz,
|
|
.p_timer = 0,
|
|
.p_name = "SETACL",
|
|
},
|
|
};
|
|
|
|
static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)];
|
|
const struct rpc_version nfsacl_version3 = {
|
|
.number = 3,
|
|
.nrprocs = ARRAY_SIZE(nfs3_acl_procedures),
|
|
.procs = nfs3_acl_procedures,
|
|
.counts = nfs3_acl_counts,
|
|
};
|
|
#endif /* CONFIG_NFS_V3_ACL */
|