![Trond Myklebust](/assets/img/avatar_default.png)
Allow nfs_refresh_inode() also to update attributes on the inode if the RPC call was sent after the last call to nfs_update_inode(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
711 lines
18 KiB
C
711 lines
18 KiB
C
/*
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* linux/fs/nfs/nfs2xdr.c
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*
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* XDR functions to encode/decode NFS RPC arguments and results.
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*
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* Copyright (C) 1992, 1993, 1994 Rick Sladkey
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* Copyright (C) 1996 Olaf Kirch
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* 04 Aug 1998 Ion Badulescu <ionut@cs.columbia.edu>
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* FIFO's need special handling in NFSv2
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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/slab.h>
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#include <linux/utsname.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/sunrpc/clnt.h>
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#include <linux/nfs.h>
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#include <linux/nfs2.h>
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#include <linux/nfs_fs.h>
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#define NFSDBG_FACILITY NFSDBG_XDR
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/* #define NFS_PARANOIA 1 */
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extern int nfs_stat_to_errno(int stat);
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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 NFS_fhandle_sz (8)
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#define NFS_sattr_sz (8)
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#define NFS_filename_sz (1+(NFS2_MAXNAMLEN>>2))
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#define NFS_path_sz (1+(NFS2_MAXPATHLEN>>2))
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#define NFS_fattr_sz (17)
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#define NFS_info_sz (5)
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#define NFS_entry_sz (NFS_filename_sz+3)
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#define NFS_diropargs_sz (NFS_fhandle_sz+NFS_filename_sz)
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#define NFS_sattrargs_sz (NFS_fhandle_sz+NFS_sattr_sz)
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#define NFS_readlinkargs_sz (NFS_fhandle_sz)
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#define NFS_readargs_sz (NFS_fhandle_sz+3)
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#define NFS_writeargs_sz (NFS_fhandle_sz+4)
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#define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz)
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#define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz)
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#define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz)
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#define NFS_symlinkargs_sz (NFS_diropargs_sz+NFS_path_sz+NFS_sattr_sz)
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#define NFS_readdirargs_sz (NFS_fhandle_sz+2)
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#define NFS_attrstat_sz (1+NFS_fattr_sz)
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#define NFS_diropres_sz (1+NFS_fhandle_sz+NFS_fattr_sz)
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#define NFS_readlinkres_sz (2)
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#define NFS_readres_sz (1+NFS_fattr_sz+1)
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#define NFS_writeres_sz (NFS_attrstat_sz)
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#define NFS_stat_sz (1)
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#define NFS_readdirres_sz (1)
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#define NFS_statfsres_sz (1+NFS_info_sz)
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/*
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* Common NFS XDR functions as inlines
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*/
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static inline u32 *
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xdr_encode_fhandle(u32 *p, struct nfs_fh *fhandle)
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{
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memcpy(p, fhandle->data, NFS2_FHSIZE);
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return p + XDR_QUADLEN(NFS2_FHSIZE);
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}
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static inline u32 *
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xdr_decode_fhandle(u32 *p, struct nfs_fh *fhandle)
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{
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/* NFSv2 handles have a fixed length */
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fhandle->size = NFS2_FHSIZE;
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memcpy(fhandle->data, p, NFS2_FHSIZE);
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return p + XDR_QUADLEN(NFS2_FHSIZE);
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}
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static inline u32*
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xdr_encode_time(u32 *p, struct timespec *timep)
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{
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*p++ = htonl(timep->tv_sec);
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/* Convert nanoseconds into microseconds */
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*p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0);
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return p;
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}
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static inline u32*
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xdr_encode_current_server_time(u32 *p, struct timespec *timep)
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{
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/*
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* Passing the invalid value useconds=1000000 is a
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* Sun convention for "set to current server time".
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* It's needed to make permissions checks for the
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* "touch" program across v2 mounts to Solaris and
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* Irix boxes work correctly. See description of
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* sattr in section 6.1 of "NFS Illustrated" by
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* Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
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*/
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*p++ = htonl(timep->tv_sec);
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*p++ = htonl(1000000);
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return p;
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}
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static inline u32*
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xdr_decode_time(u32 *p, struct timespec *timep)
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{
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timep->tv_sec = ntohl(*p++);
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/* Convert microseconds into nanoseconds */
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timep->tv_nsec = ntohl(*p++) * 1000;
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return p;
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}
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static u32 *
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xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr)
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{
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u32 rdev;
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fattr->type = (enum nfs_ftype) ntohl(*p++);
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fattr->mode = ntohl(*p++);
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fattr->nlink = ntohl(*p++);
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fattr->uid = ntohl(*p++);
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fattr->gid = ntohl(*p++);
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fattr->size = ntohl(*p++);
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fattr->du.nfs2.blocksize = ntohl(*p++);
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rdev = ntohl(*p++);
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fattr->du.nfs2.blocks = ntohl(*p++);
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fattr->fsid_u.nfs3 = ntohl(*p++);
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fattr->fileid = ntohl(*p++);
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p = xdr_decode_time(p, &fattr->atime);
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p = xdr_decode_time(p, &fattr->mtime);
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p = xdr_decode_time(p, &fattr->ctime);
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fattr->valid |= NFS_ATTR_FATTR;
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fattr->rdev = new_decode_dev(rdev);
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if (fattr->type == NFCHR && rdev == NFS2_FIFO_DEV) {
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fattr->type = NFFIFO;
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fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO;
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fattr->rdev = 0;
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}
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return p;
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}
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#define SATTR(p, attr, flag, field) \
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*p++ = (attr->ia_valid & flag) ? htonl(attr->field) : ~(u32) 0
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static inline u32 *
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xdr_encode_sattr(u32 *p, struct iattr *attr)
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{
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SATTR(p, attr, ATTR_MODE, ia_mode);
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SATTR(p, attr, ATTR_UID, ia_uid);
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SATTR(p, attr, ATTR_GID, ia_gid);
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SATTR(p, attr, ATTR_SIZE, ia_size);
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if (attr->ia_valid & ATTR_ATIME_SET) {
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p = xdr_encode_time(p, &attr->ia_atime);
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} else if (attr->ia_valid & ATTR_ATIME) {
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p = xdr_encode_current_server_time(p, &attr->ia_atime);
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} else {
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*p++ = ~(u32) 0;
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*p++ = ~(u32) 0;
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}
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if (attr->ia_valid & ATTR_MTIME_SET) {
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p = xdr_encode_time(p, &attr->ia_mtime);
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} else if (attr->ia_valid & ATTR_MTIME) {
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p = xdr_encode_current_server_time(p, &attr->ia_mtime);
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} else {
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*p++ = ~(u32) 0;
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*p++ = ~(u32) 0;
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}
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return p;
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}
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#undef SATTR
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/*
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* NFS encode functions
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*/
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/*
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* Encode file handle argument
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* GETATTR, READLINK, STATFS
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*/
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static int
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nfs_xdr_fhandle(struct rpc_rqst *req, u32 *p, struct nfs_fh *fh)
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{
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p = xdr_encode_fhandle(p, fh);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode SETATTR arguments
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*/
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static int
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nfs_xdr_sattrargs(struct rpc_rqst *req, u32 *p, struct nfs_sattrargs *args)
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{
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p = xdr_encode_fhandle(p, args->fh);
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p = xdr_encode_sattr(p, args->sattr);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode directory ops argument
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* LOOKUP, REMOVE, RMDIR
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*/
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static int
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nfs_xdr_diropargs(struct rpc_rqst *req, u32 *p, struct nfs_diropargs *args)
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{
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p = xdr_encode_fhandle(p, args->fh);
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p = xdr_encode_array(p, args->name, args->len);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Arguments to a READ call. Since we read data directly into the page
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* cache, we also set up the reply iovec here so that iov[1] points
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* exactly to the page we want to fetch.
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*/
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static int
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nfs_xdr_readargs(struct rpc_rqst *req, u32 *p, struct nfs_readargs *args)
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{
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struct rpc_auth *auth = req->rq_task->tk_auth;
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unsigned int replen;
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u32 offset = (u32)args->offset;
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u32 count = args->count;
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p = xdr_encode_fhandle(p, args->fh);
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*p++ = htonl(offset);
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*p++ = htonl(count);
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*p++ = htonl(count);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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/* Inline the page array */
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replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
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xdr_inline_pages(&req->rq_rcv_buf, replen,
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args->pages, args->pgbase, count);
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return 0;
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}
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/*
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* Decode READ reply
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*/
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static int
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nfs_xdr_readres(struct rpc_rqst *req, u32 *p, struct nfs_readres *res)
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{
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struct kvec *iov = req->rq_rcv_buf.head;
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int status, count, recvd, hdrlen;
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if ((status = ntohl(*p++)))
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return -nfs_stat_to_errno(status);
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p = xdr_decode_fattr(p, res->fattr);
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count = ntohl(*p++);
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res->eof = 0;
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hdrlen = (u8 *) p - (u8 *) iov->iov_base;
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if (iov->iov_len < hdrlen) {
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printk(KERN_WARNING "NFS: READ reply header overflowed:"
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"length %d > %Zu\n", hdrlen, iov->iov_len);
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return -errno_NFSERR_IO;
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} else if (iov->iov_len != hdrlen) {
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dprintk("NFS: READ header is short. iovec will be shifted.\n");
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xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
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}
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recvd = req->rq_rcv_buf.len - hdrlen;
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if (count > recvd) {
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printk(KERN_WARNING "NFS: server cheating in read reply: "
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"count %d > recvd %d\n", count, recvd);
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count = recvd;
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}
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dprintk("RPC: readres OK count %d\n", count);
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if (count < res->count)
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res->count = count;
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return count;
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}
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/*
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* Write arguments. Splice the buffer to be written into the iovec.
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*/
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static int
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nfs_xdr_writeargs(struct rpc_rqst *req, u32 *p, struct nfs_writeargs *args)
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{
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struct xdr_buf *sndbuf = &req->rq_snd_buf;
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u32 offset = (u32)args->offset;
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u32 count = args->count;
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p = xdr_encode_fhandle(p, args->fh);
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*p++ = htonl(offset);
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*p++ = htonl(offset);
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*p++ = htonl(count);
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*p++ = htonl(count);
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sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
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/* Copy the page array */
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xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
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return 0;
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}
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/*
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* Encode create arguments
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* CREATE, MKDIR
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*/
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static int
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nfs_xdr_createargs(struct rpc_rqst *req, u32 *p, struct nfs_createargs *args)
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{
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p = xdr_encode_fhandle(p, args->fh);
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p = xdr_encode_array(p, args->name, args->len);
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p = xdr_encode_sattr(p, args->sattr);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode RENAME arguments
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*/
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static int
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nfs_xdr_renameargs(struct rpc_rqst *req, u32 *p, struct nfs_renameargs *args)
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{
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p = xdr_encode_fhandle(p, args->fromfh);
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p = xdr_encode_array(p, args->fromname, args->fromlen);
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p = xdr_encode_fhandle(p, args->tofh);
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p = xdr_encode_array(p, args->toname, args->tolen);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode LINK arguments
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*/
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static int
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nfs_xdr_linkargs(struct rpc_rqst *req, u32 *p, struct nfs_linkargs *args)
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{
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p = xdr_encode_fhandle(p, args->fromfh);
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p = xdr_encode_fhandle(p, args->tofh);
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p = xdr_encode_array(p, args->toname, args->tolen);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode SYMLINK arguments
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*/
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static int
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nfs_xdr_symlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_symlinkargs *args)
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{
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p = xdr_encode_fhandle(p, args->fromfh);
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p = xdr_encode_array(p, args->fromname, args->fromlen);
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p = xdr_encode_array(p, args->topath, args->tolen);
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p = xdr_encode_sattr(p, args->sattr);
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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return 0;
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}
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/*
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* Encode arguments to readdir call
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*/
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static int
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nfs_xdr_readdirargs(struct rpc_rqst *req, u32 *p, struct nfs_readdirargs *args)
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{
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struct rpc_task *task = req->rq_task;
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struct rpc_auth *auth = task->tk_auth;
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unsigned int replen;
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u32 count = args->count;
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p = xdr_encode_fhandle(p, args->fh);
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*p++ = htonl(args->cookie);
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*p++ = htonl(count); /* see above */
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req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
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/* Inline the page array */
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replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2;
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xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
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return 0;
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}
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/*
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* Decode the result of a readdir call.
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* We're not really decoding anymore, we just leave the buffer untouched
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* and only check that it is syntactically correct.
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* The real decoding happens in nfs_decode_entry below, called directly
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* from nfs_readdir for each entry.
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*/
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static int
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nfs_xdr_readdirres(struct rpc_rqst *req, u32 *p, void *dummy)
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{
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struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
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struct kvec *iov = rcvbuf->head;
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struct page **page;
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int hdrlen, recvd;
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int status, nr;
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unsigned int len, pglen;
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u32 *end, *entry, *kaddr;
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if ((status = ntohl(*p++)))
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return -nfs_stat_to_errno(status);
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hdrlen = (u8 *) p - (u8 *) iov->iov_base;
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if (iov->iov_len < hdrlen) {
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printk(KERN_WARNING "NFS: READDIR reply header overflowed:"
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"length %d > %Zu\n", hdrlen, iov->iov_len);
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return -errno_NFSERR_IO;
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} else if (iov->iov_len != hdrlen) {
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dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
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xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
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}
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pglen = rcvbuf->page_len;
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recvd = rcvbuf->len - hdrlen;
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if (pglen > recvd)
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pglen = recvd;
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page = rcvbuf->pages;
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kaddr = p = (u32 *)kmap_atomic(*page, KM_USER0);
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end = (u32 *)((char *)p + pglen);
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entry = p;
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for (nr = 0; *p++; nr++) {
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if (p + 2 > end)
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goto short_pkt;
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p++; /* fileid */
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len = ntohl(*p++);
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p += XDR_QUADLEN(len) + 1; /* name plus cookie */
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if (len > NFS2_MAXNAMLEN) {
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printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)!\n",
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len);
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goto err_unmap;
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}
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if (p + 2 > end)
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goto short_pkt;
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entry = p;
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}
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if (!nr && (entry[0] != 0 || entry[1] == 0))
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goto short_pkt;
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out:
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kunmap_atomic(kaddr, KM_USER0);
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return nr;
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short_pkt:
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entry[0] = entry[1] = 0;
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/* truncate listing ? */
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if (!nr) {
|
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printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
|
|
entry[1] = 1;
|
|
}
|
|
goto out;
|
|
err_unmap:
|
|
nr = -errno_NFSERR_IO;
|
|
goto out;
|
|
}
|
|
|
|
u32 *
|
|
nfs_decode_dirent(u32 *p, struct nfs_entry *entry, int plus)
|
|
{
|
|
if (!*p++) {
|
|
if (!*p)
|
|
return ERR_PTR(-EAGAIN);
|
|
entry->eof = 1;
|
|
return ERR_PTR(-EBADCOOKIE);
|
|
}
|
|
|
|
entry->ino = ntohl(*p++);
|
|
entry->len = ntohl(*p++);
|
|
entry->name = (const char *) p;
|
|
p += XDR_QUADLEN(entry->len);
|
|
entry->prev_cookie = entry->cookie;
|
|
entry->cookie = ntohl(*p++);
|
|
entry->eof = !p[0] && p[1];
|
|
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* NFS XDR decode functions
|
|
*/
|
|
/*
|
|
* Decode simple status reply
|
|
*/
|
|
static int
|
|
nfs_xdr_stat(struct rpc_rqst *req, u32 *p, void *dummy)
|
|
{
|
|
int status;
|
|
|
|
if ((status = ntohl(*p++)) != 0)
|
|
status = -nfs_stat_to_errno(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode attrstat reply
|
|
* GETATTR, SETATTR, WRITE
|
|
*/
|
|
static int
|
|
nfs_xdr_attrstat(struct rpc_rqst *req, u32 *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 diropres reply
|
|
* LOOKUP, CREATE, MKDIR
|
|
*/
|
|
static int
|
|
nfs_xdr_diropres(struct rpc_rqst *req, u32 *p, struct nfs_diropok *res)
|
|
{
|
|
int status;
|
|
|
|
if ((status = ntohl(*p++)))
|
|
return -nfs_stat_to_errno(status);
|
|
p = xdr_decode_fhandle(p, res->fh);
|
|
xdr_decode_fattr(p, res->fattr);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Encode READLINK args
|
|
*/
|
|
static int
|
|
nfs_xdr_readlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_readlinkargs *args)
|
|
{
|
|
struct rpc_auth *auth = req->rq_task->tk_auth;
|
|
unsigned int replen;
|
|
|
|
p = xdr_encode_fhandle(p, args->fh);
|
|
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
|
|
|
/* Inline the page array */
|
|
replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2;
|
|
xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Decode READLINK reply
|
|
*/
|
|
static int
|
|
nfs_xdr_readlinkres(struct rpc_rqst *req, u32 *p, void *dummy)
|
|
{
|
|
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
|
|
struct kvec *iov = rcvbuf->head;
|
|
int hdrlen, len, recvd;
|
|
char *kaddr;
|
|
int status;
|
|
|
|
if ((status = ntohl(*p++)))
|
|
return -nfs_stat_to_errno(status);
|
|
/* Convert length of symlink */
|
|
len = ntohl(*p++);
|
|
if (len >= rcvbuf->page_len || len <= 0) {
|
|
dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
|
|
return -ENAMETOOLONG;
|
|
}
|
|
hdrlen = (u8 *) p - (u8 *) iov->iov_base;
|
|
if (iov->iov_len < hdrlen) {
|
|
printk(KERN_WARNING "NFS: READLINK reply header overflowed:"
|
|
"length %d > %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) {
|
|
printk(KERN_WARNING "NFS: server cheating in readlink reply: "
|
|
"count %u > recvd %u\n", len, recvd);
|
|
return -EIO;
|
|
}
|
|
|
|
/* NULL terminate the string we got */
|
|
kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
|
|
kaddr[len+rcvbuf->page_base] = '\0';
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Decode WRITE reply
|
|
*/
|
|
static int
|
|
nfs_xdr_writeres(struct rpc_rqst *req, u32 *p, struct nfs_writeres *res)
|
|
{
|
|
res->verf->committed = NFS_FILE_SYNC;
|
|
return nfs_xdr_attrstat(req, p, res->fattr);
|
|
}
|
|
|
|
/*
|
|
* Decode STATFS reply
|
|
*/
|
|
static int
|
|
nfs_xdr_statfsres(struct rpc_rqst *req, u32 *p, struct nfs2_fsstat *res)
|
|
{
|
|
int status;
|
|
|
|
if ((status = ntohl(*p++)))
|
|
return -nfs_stat_to_errno(status);
|
|
|
|
res->tsize = ntohl(*p++);
|
|
res->bsize = ntohl(*p++);
|
|
res->blocks = ntohl(*p++);
|
|
res->bfree = ntohl(*p++);
|
|
res->bavail = ntohl(*p++);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We need to translate between nfs status return values and
|
|
* the local errno values which may not be the same.
|
|
*/
|
|
static 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, ESERVERFAULT },
|
|
{ NFSERR_BADTYPE, EBADTYPE },
|
|
{ NFSERR_JUKEBOX, EJUKEBOX },
|
|
{ -1, EIO }
|
|
};
|
|
|
|
/*
|
|
* Convert an NFS error code to a local one.
|
|
* This one is used jointly by NFSv2 and NFSv3.
|
|
*/
|
|
int
|
|
nfs_stat_to_errno(int stat)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
|
if (nfs_errtbl[i].stat == stat)
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
printk(KERN_ERR "nfs_stat_to_errno: bad nfs status return value: %d\n", stat);
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
|
|
#ifndef MAX
|
|
# define MAX(a, b) (((a) > (b))? (a) : (b))
|
|
#endif
|
|
|
|
#define PROC(proc, argtype, restype, timer) \
|
|
[NFSPROC_##proc] = { \
|
|
.p_proc = NFSPROC_##proc, \
|
|
.p_encode = (kxdrproc_t) nfs_xdr_##argtype, \
|
|
.p_decode = (kxdrproc_t) nfs_xdr_##restype, \
|
|
.p_bufsiz = MAX(NFS_##argtype##_sz,NFS_##restype##_sz) << 2, \
|
|
.p_timer = timer \
|
|
}
|
|
struct rpc_procinfo nfs_procedures[] = {
|
|
PROC(GETATTR, fhandle, attrstat, 1),
|
|
PROC(SETATTR, sattrargs, attrstat, 0),
|
|
PROC(LOOKUP, diropargs, diropres, 2),
|
|
PROC(READLINK, readlinkargs, readlinkres, 3),
|
|
PROC(READ, readargs, readres, 3),
|
|
PROC(WRITE, writeargs, writeres, 4),
|
|
PROC(CREATE, createargs, diropres, 0),
|
|
PROC(REMOVE, diropargs, stat, 0),
|
|
PROC(RENAME, renameargs, stat, 0),
|
|
PROC(LINK, linkargs, stat, 0),
|
|
PROC(SYMLINK, symlinkargs, stat, 0),
|
|
PROC(MKDIR, createargs, diropres, 0),
|
|
PROC(RMDIR, diropargs, stat, 0),
|
|
PROC(READDIR, readdirargs, readdirres, 3),
|
|
PROC(STATFS, fhandle, statfsres, 0),
|
|
};
|
|
|
|
struct rpc_version nfs_version2 = {
|
|
.number = 2,
|
|
.nrprocs = sizeof(nfs_procedures)/sizeof(nfs_procedures[0]),
|
|
.procs = nfs_procedures
|
|
};
|