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1530 lines
36 KiB
C
1530 lines
36 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* XDR support for nfsd/protocol version 3.
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*
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
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*
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* 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
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*/
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#include <linux/namei.h>
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#include <linux/sunrpc/svc_xprt.h>
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#include "xdr3.h"
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#include "auth.h"
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#include "netns.h"
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#include "vfs.h"
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#define NFSDDBG_FACILITY NFSDDBG_XDR
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/*
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* Force construction of an empty post-op attr
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*/
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static const struct svc_fh nfs3svc_null_fh = {
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.fh_no_wcc = true,
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};
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/*
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* Mapping of S_IF* types to NFS file types
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*/
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static const u32 nfs3_ftypes[] = {
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NF3NON, NF3FIFO, NF3CHR, NF3BAD,
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NF3DIR, NF3BAD, NF3BLK, NF3BAD,
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NF3REG, NF3BAD, NF3LNK, NF3BAD,
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NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
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};
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/*
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* Basic NFSv3 data types (RFC 1813 Sections 2.5 and 2.6)
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*/
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static __be32 *
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encode_time3(__be32 *p, struct timespec64 *time)
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{
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*p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
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return p;
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}
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static __be32 *
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encode_nfstime3(__be32 *p, const struct timespec64 *time)
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{
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*p++ = cpu_to_be32((u32)time->tv_sec);
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*p++ = cpu_to_be32(time->tv_nsec);
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return p;
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}
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static bool
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svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, XDR_UNIT * 2);
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if (!p)
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return false;
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timep->tv_sec = be32_to_cpup(p++);
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timep->tv_nsec = be32_to_cpup(p);
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return true;
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}
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/**
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* svcxdr_decode_nfs_fh3 - Decode an NFSv3 file handle
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* @xdr: XDR stream positioned at an undecoded NFSv3 FH
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* @fhp: OUT: filled-in server file handle
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*
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* Return values:
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* %false: The encoded file handle was not valid
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* %true: @fhp has been initialized
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*/
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bool
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svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp)
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{
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__be32 *p;
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u32 size;
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if (xdr_stream_decode_u32(xdr, &size) < 0)
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return false;
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if (size == 0 || size > NFS3_FHSIZE)
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return false;
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p = xdr_inline_decode(xdr, size);
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if (!p)
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return false;
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fh_init(fhp, NFS3_FHSIZE);
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fhp->fh_handle.fh_size = size;
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memcpy(&fhp->fh_handle.fh_base, p, size);
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return true;
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}
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static bool
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svcxdr_encode_nfsstat3(struct xdr_stream *xdr, __be32 status)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, sizeof(status));
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if (!p)
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return false;
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*p = status;
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return true;
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}
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static bool
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svcxdr_encode_nfs_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
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{
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u32 size = fhp->fh_handle.fh_size;
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__be32 *p;
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p = xdr_reserve_space(xdr, XDR_UNIT + size);
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if (!p)
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return false;
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*p++ = cpu_to_be32(size);
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if (size)
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p[XDR_QUADLEN(size) - 1] = 0;
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memcpy(p, &fhp->fh_handle.fh_base, size);
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return true;
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}
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static bool
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svcxdr_encode_post_op_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
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{
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if (xdr_stream_encode_item_present(xdr) < 0)
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return false;
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if (!svcxdr_encode_nfs_fh3(xdr, fhp))
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return false;
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return true;
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}
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static __be32 *
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encode_fh(__be32 *p, struct svc_fh *fhp)
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{
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unsigned int size = fhp->fh_handle.fh_size;
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*p++ = htonl(size);
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if (size) p[XDR_QUADLEN(size)-1]=0;
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memcpy(p, &fhp->fh_handle.fh_base, size);
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return p + XDR_QUADLEN(size);
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}
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static bool
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svcxdr_encode_writeverf3(struct xdr_stream *xdr, const __be32 *verf)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, NFS3_WRITEVERFSIZE);
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if (!p)
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return false;
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memcpy(p, verf, NFS3_WRITEVERFSIZE);
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return true;
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}
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static bool
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svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len)
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{
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u32 size, i;
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__be32 *p;
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char *c;
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if (xdr_stream_decode_u32(xdr, &size) < 0)
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return false;
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if (size == 0 || size > NFS3_MAXNAMLEN)
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return false;
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p = xdr_inline_decode(xdr, size);
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if (!p)
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return false;
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*len = size;
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*name = (char *)p;
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for (i = 0, c = *name; i < size; i++, c++) {
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if (*c == '\0' || *c == '/')
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return false;
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}
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return true;
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}
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static bool
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svcxdr_decode_diropargs3(struct xdr_stream *xdr, struct svc_fh *fhp,
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char **name, unsigned int *len)
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{
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return svcxdr_decode_nfs_fh3(xdr, fhp) &&
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svcxdr_decode_filename3(xdr, name, len);
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}
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static bool
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svcxdr_decode_sattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
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struct iattr *iap)
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{
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u32 set_it;
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iap->ia_valid = 0;
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if (xdr_stream_decode_bool(xdr, &set_it) < 0)
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return false;
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if (set_it) {
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u32 mode;
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if (xdr_stream_decode_u32(xdr, &mode) < 0)
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return false;
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iap->ia_valid |= ATTR_MODE;
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iap->ia_mode = mode;
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}
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if (xdr_stream_decode_bool(xdr, &set_it) < 0)
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return false;
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if (set_it) {
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u32 uid;
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if (xdr_stream_decode_u32(xdr, &uid) < 0)
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return false;
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iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), uid);
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if (uid_valid(iap->ia_uid))
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iap->ia_valid |= ATTR_UID;
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}
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if (xdr_stream_decode_bool(xdr, &set_it) < 0)
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return false;
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if (set_it) {
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u32 gid;
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if (xdr_stream_decode_u32(xdr, &gid) < 0)
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return false;
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iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), gid);
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if (gid_valid(iap->ia_gid))
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iap->ia_valid |= ATTR_GID;
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}
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if (xdr_stream_decode_bool(xdr, &set_it) < 0)
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return false;
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if (set_it) {
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u64 newsize;
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if (xdr_stream_decode_u64(xdr, &newsize) < 0)
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return false;
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iap->ia_valid |= ATTR_SIZE;
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iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
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}
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if (xdr_stream_decode_u32(xdr, &set_it) < 0)
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return false;
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switch (set_it) {
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case DONT_CHANGE:
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break;
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case SET_TO_SERVER_TIME:
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iap->ia_valid |= ATTR_ATIME;
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break;
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case SET_TO_CLIENT_TIME:
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if (!svcxdr_decode_nfstime3(xdr, &iap->ia_atime))
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return false;
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iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
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break;
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default:
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return false;
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}
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if (xdr_stream_decode_u32(xdr, &set_it) < 0)
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return false;
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switch (set_it) {
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case DONT_CHANGE:
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break;
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case SET_TO_SERVER_TIME:
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iap->ia_valid |= ATTR_MTIME;
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break;
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case SET_TO_CLIENT_TIME:
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if (!svcxdr_decode_nfstime3(xdr, &iap->ia_mtime))
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return false;
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iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
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break;
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default:
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return false;
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}
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return true;
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}
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static bool
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svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args)
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{
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__be32 *p;
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u32 check;
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if (xdr_stream_decode_bool(xdr, &check) < 0)
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return false;
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if (check) {
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p = xdr_inline_decode(xdr, XDR_UNIT * 2);
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if (!p)
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return false;
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args->check_guard = 1;
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args->guardtime = be32_to_cpup(p);
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} else
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args->check_guard = 0;
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return true;
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}
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static bool
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svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, XDR_UNIT * 2);
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if (!p)
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return false;
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args->major = be32_to_cpup(p++);
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args->minor = be32_to_cpup(p);
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return true;
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}
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static bool
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svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
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struct nfsd3_mknodargs *args)
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{
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return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
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svcxdr_decode_specdata3(xdr, args);
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}
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static bool
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svcxdr_encode_fattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
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const struct svc_fh *fhp, const struct kstat *stat)
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{
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struct user_namespace *userns = nfsd_user_namespace(rqstp);
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__be32 *p;
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u64 fsid;
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p = xdr_reserve_space(xdr, XDR_UNIT * 21);
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if (!p)
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return false;
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*p++ = cpu_to_be32(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
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*p++ = cpu_to_be32((u32)(stat->mode & S_IALLUGO));
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*p++ = cpu_to_be32((u32)stat->nlink);
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*p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
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*p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
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if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN)
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p = xdr_encode_hyper(p, (u64)NFS3_MAXPATHLEN);
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else
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p = xdr_encode_hyper(p, (u64)stat->size);
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/* used */
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p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
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/* rdev */
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*p++ = cpu_to_be32((u32)MAJOR(stat->rdev));
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*p++ = cpu_to_be32((u32)MINOR(stat->rdev));
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switch(fsid_source(fhp)) {
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case FSIDSOURCE_FSID:
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fsid = (u64)fhp->fh_export->ex_fsid;
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break;
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case FSIDSOURCE_UUID:
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fsid = ((u64 *)fhp->fh_export->ex_uuid)[0];
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fsid ^= ((u64 *)fhp->fh_export->ex_uuid)[1];
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break;
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default:
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fsid = (u64)huge_encode_dev(fhp->fh_dentry->d_sb->s_dev);
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}
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p = xdr_encode_hyper(p, fsid);
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/* fileid */
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p = xdr_encode_hyper(p, stat->ino);
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p = encode_nfstime3(p, &stat->atime);
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p = encode_nfstime3(p, &stat->mtime);
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encode_nfstime3(p, &stat->ctime);
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return true;
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}
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static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
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{
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u64 f;
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switch(fsid_source(fhp)) {
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default:
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case FSIDSOURCE_DEV:
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p = xdr_encode_hyper(p, (u64)huge_encode_dev
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(fhp->fh_dentry->d_sb->s_dev));
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break;
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case FSIDSOURCE_FSID:
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p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
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break;
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case FSIDSOURCE_UUID:
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f = ((u64*)fhp->fh_export->ex_uuid)[0];
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f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
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p = xdr_encode_hyper(p, f);
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break;
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}
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return p;
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}
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static __be32 *
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encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
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struct kstat *stat)
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{
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struct user_namespace *userns = nfsd_user_namespace(rqstp);
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*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
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*p++ = htonl((u32) (stat->mode & S_IALLUGO));
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*p++ = htonl((u32) stat->nlink);
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*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
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*p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
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if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
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p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
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} else {
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p = xdr_encode_hyper(p, (u64) stat->size);
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}
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p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
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*p++ = htonl((u32) MAJOR(stat->rdev));
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*p++ = htonl((u32) MINOR(stat->rdev));
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p = encode_fsid(p, fhp);
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p = xdr_encode_hyper(p, stat->ino);
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p = encode_time3(p, &stat->atime);
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p = encode_time3(p, &stat->mtime);
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p = encode_time3(p, &stat->ctime);
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return p;
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}
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static __be32 *
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encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
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{
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/* Attributes to follow */
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*p++ = xdr_one;
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return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
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}
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static bool
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svcxdr_encode_wcc_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, XDR_UNIT * 6);
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if (!p)
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return false;
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p = xdr_encode_hyper(p, (u64)fhp->fh_pre_size);
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p = encode_nfstime3(p, &fhp->fh_pre_mtime);
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encode_nfstime3(p, &fhp->fh_pre_ctime);
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return true;
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}
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static bool
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svcxdr_encode_pre_op_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
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{
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if (!fhp->fh_pre_saved) {
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if (xdr_stream_encode_item_absent(xdr) < 0)
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return false;
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return true;
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}
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if (xdr_stream_encode_item_present(xdr) < 0)
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return false;
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return svcxdr_encode_wcc_attr(xdr, fhp);
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}
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static bool
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svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
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const struct svc_fh *fhp)
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{
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struct dentry *dentry = fhp->fh_dentry;
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struct kstat stat;
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/*
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* The inode may be NULL if the call failed because of a
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* stale file handle. In this case, no attributes are
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* returned.
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*/
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if (fhp->fh_no_wcc || !dentry || !d_really_is_positive(dentry))
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goto no_post_op_attrs;
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if (fh_getattr(fhp, &stat) != nfs_ok)
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goto no_post_op_attrs;
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if (xdr_stream_encode_item_present(xdr) < 0)
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return false;
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lease_get_mtime(d_inode(dentry), &stat.mtime);
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if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &stat))
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return false;
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return true;
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no_post_op_attrs:
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return xdr_stream_encode_item_absent(xdr) > 0;
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}
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|
|
/*
|
|
* Encode post-operation attributes.
|
|
* The inode may be NULL if the call failed because of a stale file
|
|
* handle. In this case, no attributes are returned.
|
|
*/
|
|
static __be32 *
|
|
encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
struct dentry *dentry = fhp->fh_dentry;
|
|
if (!fhp->fh_no_wcc && dentry && d_really_is_positive(dentry)) {
|
|
__be32 err;
|
|
struct kstat stat;
|
|
|
|
err = fh_getattr(fhp, &stat);
|
|
if (!err) {
|
|
*p++ = xdr_one; /* attributes follow */
|
|
lease_get_mtime(d_inode(dentry), &stat.mtime);
|
|
return encode_fattr3(rqstp, p, fhp, &stat);
|
|
}
|
|
}
|
|
*p++ = xdr_zero;
|
|
return p;
|
|
}
|
|
|
|
/* Helper for NFSv3 ACLs */
|
|
__be32 *
|
|
nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
return encode_post_op_attr(rqstp, p, fhp);
|
|
}
|
|
|
|
/*
|
|
* Encode weak cache consistency data
|
|
*/
|
|
static bool
|
|
svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
|
|
const struct svc_fh *fhp)
|
|
{
|
|
struct dentry *dentry = fhp->fh_dentry;
|
|
|
|
if (!dentry || !d_really_is_positive(dentry) || !fhp->fh_post_saved)
|
|
goto neither;
|
|
|
|
/* before */
|
|
if (!svcxdr_encode_pre_op_attr(xdr, fhp))
|
|
return false;
|
|
|
|
/* after */
|
|
if (xdr_stream_encode_item_present(xdr) < 0)
|
|
return false;
|
|
if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &fhp->fh_post_attr))
|
|
return false;
|
|
|
|
return true;
|
|
|
|
neither:
|
|
if (xdr_stream_encode_item_absent(xdr) < 0)
|
|
return false;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, fhp))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Enocde weak cache consistency data
|
|
*/
|
|
static __be32 *
|
|
encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
struct dentry *dentry = fhp->fh_dentry;
|
|
|
|
if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) {
|
|
if (fhp->fh_pre_saved) {
|
|
*p++ = xdr_one;
|
|
p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
|
|
p = encode_time3(p, &fhp->fh_pre_mtime);
|
|
p = encode_time3(p, &fhp->fh_pre_ctime);
|
|
} else {
|
|
*p++ = xdr_zero;
|
|
}
|
|
return encode_saved_post_attr(rqstp, p, fhp);
|
|
}
|
|
/* no pre- or post-attrs */
|
|
*p++ = xdr_zero;
|
|
return encode_post_op_attr(rqstp, p, fhp);
|
|
}
|
|
|
|
static bool fs_supports_change_attribute(struct super_block *sb)
|
|
{
|
|
return sb->s_flags & SB_I_VERSION || sb->s_export_op->fetch_iversion;
|
|
}
|
|
|
|
/*
|
|
* Fill in the pre_op attr for the wcc data
|
|
*/
|
|
void fill_pre_wcc(struct svc_fh *fhp)
|
|
{
|
|
struct inode *inode;
|
|
struct kstat stat;
|
|
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
|
|
|
|
if (fhp->fh_no_wcc || fhp->fh_pre_saved)
|
|
return;
|
|
inode = d_inode(fhp->fh_dentry);
|
|
if (fs_supports_change_attribute(inode->i_sb) || !v4) {
|
|
__be32 err = fh_getattr(fhp, &stat);
|
|
|
|
if (err) {
|
|
/* Grab the times from inode anyway */
|
|
stat.mtime = inode->i_mtime;
|
|
stat.ctime = inode->i_ctime;
|
|
stat.size = inode->i_size;
|
|
}
|
|
fhp->fh_pre_mtime = stat.mtime;
|
|
fhp->fh_pre_ctime = stat.ctime;
|
|
fhp->fh_pre_size = stat.size;
|
|
}
|
|
if (v4)
|
|
fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
|
|
|
|
fhp->fh_pre_saved = true;
|
|
}
|
|
|
|
/*
|
|
* Fill in the post_op attr for the wcc data
|
|
*/
|
|
void fill_post_wcc(struct svc_fh *fhp)
|
|
{
|
|
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
|
|
struct inode *inode = d_inode(fhp->fh_dentry);
|
|
|
|
if (fhp->fh_no_wcc)
|
|
return;
|
|
|
|
if (fhp->fh_post_saved)
|
|
printk("nfsd: inode locked twice during operation.\n");
|
|
|
|
fhp->fh_post_saved = true;
|
|
|
|
if (fs_supports_change_attribute(inode->i_sb) || !v4) {
|
|
__be32 err = fh_getattr(fhp, &fhp->fh_post_attr);
|
|
|
|
if (err) {
|
|
fhp->fh_post_saved = false;
|
|
fhp->fh_post_attr.ctime = inode->i_ctime;
|
|
}
|
|
}
|
|
if (v4)
|
|
fhp->fh_post_change =
|
|
nfsd4_change_attribute(&fhp->fh_post_attr, inode);
|
|
}
|
|
|
|
/*
|
|
* XDR decode functions
|
|
*/
|
|
|
|
int
|
|
nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd_fhandle *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_nfs_fh3(xdr, &args->fh);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_sattrargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
|
|
svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
|
|
svcxdr_decode_sattrguard3(xdr, args);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_diropargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_accessargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->access) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_readargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_writeargs *args = rqstp->rq_argp;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
struct kvec *head = rqstp->rq_arg.head;
|
|
struct kvec *tail = rqstp->rq_arg.tail;
|
|
size_t remaining;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->stable) < 0)
|
|
return 0;
|
|
|
|
/* opaque data */
|
|
if (xdr_stream_decode_u32(xdr, &args->len) < 0)
|
|
return 0;
|
|
|
|
/* request sanity */
|
|
if (args->count != args->len)
|
|
return 0;
|
|
remaining = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len;
|
|
remaining -= xdr_stream_pos(xdr);
|
|
if (remaining < xdr_align_size(args->len))
|
|
return 0;
|
|
if (args->count > max_blocksize) {
|
|
args->count = max_blocksize;
|
|
args->len = max_blocksize;
|
|
}
|
|
|
|
args->first.iov_base = xdr->p;
|
|
args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_createargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
|
|
return 0;
|
|
switch (args->createmode) {
|
|
case NFS3_CREATE_UNCHECKED:
|
|
case NFS3_CREATE_GUARDED:
|
|
return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
|
|
case NFS3_CREATE_EXCLUSIVE:
|
|
args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
|
|
if (!args->verf)
|
|
return 0;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_createargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_diropargs3(xdr, &args->fh,
|
|
&args->name, &args->len) &&
|
|
svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_symlinkargs *args = rqstp->rq_argp;
|
|
struct kvec *head = rqstp->rq_arg.head;
|
|
struct kvec *tail = rqstp->rq_arg.tail;
|
|
size_t remaining;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
|
|
return 0;
|
|
if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
|
|
return 0;
|
|
|
|
/* request sanity */
|
|
remaining = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len;
|
|
remaining -= xdr_stream_pos(xdr);
|
|
if (remaining < xdr_align_size(args->tlen))
|
|
return 0;
|
|
|
|
args->first.iov_base = xdr->p;
|
|
args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_mknodargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
|
|
return 0;
|
|
switch (args->ftype) {
|
|
case NF3CHR:
|
|
case NF3BLK:
|
|
return svcxdr_decode_devicedata3(rqstp, xdr, args);
|
|
case NF3SOCK:
|
|
case NF3FIFO:
|
|
return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
|
|
case NF3REG:
|
|
case NF3DIR:
|
|
case NF3LNK:
|
|
/* Valid XDR but illegal file types */
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_renameargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_diropargs3(xdr, &args->ffh,
|
|
&args->fname, &args->flen) &&
|
|
svcxdr_decode_diropargs3(xdr, &args->tfh,
|
|
&args->tname, &args->tlen);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_linkargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
|
|
svcxdr_decode_diropargs3(xdr, &args->tfh,
|
|
&args->tname, &args->tlen);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_readdirargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
|
|
return 0;
|
|
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
|
|
if (!args->verf)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_readdirargs *args = rqstp->rq_argp;
|
|
u32 dircount;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
|
|
return 0;
|
|
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
|
|
if (!args->verf)
|
|
return 0;
|
|
/* dircount is ignored */
|
|
if (xdr_stream_decode_u32(xdr, &dircount) < 0)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct nfsd3_commitargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return 0;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return 0;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* XDR encode functions
|
|
*/
|
|
|
|
/* GETATTR */
|
|
int
|
|
nfs3svc_encode_getattrres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
lease_get_mtime(d_inode(resp->fh.fh_dentry), &resp->stat.mtime);
|
|
if (!svcxdr_encode_fattr3(rqstp, xdr, &resp->fh, &resp->stat))
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* SETATTR, REMOVE, RMDIR */
|
|
int
|
|
nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
|
|
svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
|
|
}
|
|
|
|
/* LOOKUP */
|
|
int nfs3svc_encode_lookupres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_diropres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
|
|
return 0;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* ACCESS */
|
|
int
|
|
nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_accessres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->access) < 0)
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* READLINK */
|
|
int
|
|
nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
|
|
struct kvec *head = rqstp->rq_res.head;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->len) < 0)
|
|
return 0;
|
|
xdr_write_pages(xdr, resp->pages, 0, resp->len);
|
|
if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* READ */
|
|
int
|
|
nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_readres *resp = rqstp->rq_resp;
|
|
struct kvec *head = rqstp->rq_res.head;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return 0;
|
|
if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return 0;
|
|
xdr_write_pages(xdr, resp->pages, rqstp->rq_res.page_base,
|
|
resp->count);
|
|
if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* WRITE */
|
|
int
|
|
nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_writeres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return 0;
|
|
if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
|
|
return 0;
|
|
if (!svcxdr_encode_writeverf3(xdr, resp->verf))
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* CREATE, MKDIR, SYMLINK, MKNOD */
|
|
int
|
|
nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_diropres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
|
|
return 0;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return 0;
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* RENAME */
|
|
int
|
|
nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_renameres *resp = rqstp->rq_resp;
|
|
|
|
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
|
|
svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
|
|
svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
|
|
}
|
|
|
|
/* LINK */
|
|
int
|
|
nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_linkres *resp = rqstp->rq_resp;
|
|
|
|
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
|
|
svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh) &&
|
|
svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
|
|
}
|
|
|
|
/* READDIR */
|
|
int
|
|
nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct nfsd3_readdirres *resp = rqstp->rq_resp;
|
|
|
|
*p++ = resp->status;
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
|
|
if (resp->status == 0) {
|
|
/* stupid readdir cookie */
|
|
memcpy(p, resp->verf, 8); p += 2;
|
|
xdr_ressize_check(rqstp, p);
|
|
if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
|
|
return 1; /*No room for trailer */
|
|
rqstp->rq_res.page_len = (resp->count) << 2;
|
|
|
|
/* add the 'tail' to the end of the 'head' page - page 0. */
|
|
rqstp->rq_res.tail[0].iov_base = p;
|
|
*p++ = 0; /* no more entries */
|
|
*p++ = htonl(resp->common.err == nfserr_eof);
|
|
rqstp->rq_res.tail[0].iov_len = 2<<2;
|
|
return 1;
|
|
} else
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
static __be32 *
|
|
encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
|
|
int namlen, u64 ino)
|
|
{
|
|
*p++ = xdr_one; /* mark entry present */
|
|
p = xdr_encode_hyper(p, ino); /* file id */
|
|
p = xdr_encode_array(p, name, namlen);/* name length & name */
|
|
|
|
cd->offset = p; /* remember pointer */
|
|
p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
|
|
|
|
return p;
|
|
}
|
|
|
|
static __be32
|
|
compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
|
|
const char *name, int namlen, u64 ino)
|
|
{
|
|
struct svc_export *exp;
|
|
struct dentry *dparent, *dchild;
|
|
__be32 rv = nfserr_noent;
|
|
|
|
dparent = cd->fh.fh_dentry;
|
|
exp = cd->fh.fh_export;
|
|
|
|
if (isdotent(name, namlen)) {
|
|
if (namlen == 2) {
|
|
dchild = dget_parent(dparent);
|
|
/*
|
|
* Don't return filehandle for ".." if we're at
|
|
* the filesystem or export root:
|
|
*/
|
|
if (dchild == dparent)
|
|
goto out;
|
|
if (dparent == exp->ex_path.dentry)
|
|
goto out;
|
|
} else
|
|
dchild = dget(dparent);
|
|
} else
|
|
dchild = lookup_positive_unlocked(name, dparent, namlen);
|
|
if (IS_ERR(dchild))
|
|
return rv;
|
|
if (d_mountpoint(dchild))
|
|
goto out;
|
|
if (dchild->d_inode->i_ino != ino)
|
|
goto out;
|
|
rv = fh_compose(fhp, exp, dchild, &cd->fh);
|
|
out:
|
|
dput(dchild);
|
|
return rv;
|
|
}
|
|
|
|
static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
|
|
{
|
|
struct svc_fh *fh = &cd->scratch;
|
|
__be32 err;
|
|
|
|
fh_init(fh, NFS3_FHSIZE);
|
|
err = compose_entry_fh(cd, fh, name, namlen, ino);
|
|
if (err) {
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
goto out;
|
|
}
|
|
p = encode_post_op_attr(cd->rqstp, p, fh);
|
|
*p++ = xdr_one; /* yes, a file handle follows */
|
|
p = encode_fh(p, fh);
|
|
out:
|
|
fh_put(fh);
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* Encode a directory entry. This one works for both normal readdir
|
|
* and readdirplus.
|
|
* The normal readdir reply requires 2 (fileid) + 1 (stringlen)
|
|
* + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
|
|
*
|
|
* The readdirplus baggage is 1+21 words for post_op_attr, plus the
|
|
* file handle.
|
|
*/
|
|
|
|
#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
|
|
#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
|
|
static int
|
|
encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type, int plus)
|
|
{
|
|
struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
|
|
common);
|
|
__be32 *p = cd->buffer;
|
|
caddr_t curr_page_addr = NULL;
|
|
struct page ** page;
|
|
int slen; /* string (name) length */
|
|
int elen; /* estimated entry length in words */
|
|
int num_entry_words = 0; /* actual number of words */
|
|
|
|
if (cd->offset) {
|
|
u64 offset64 = offset;
|
|
|
|
if (unlikely(cd->offset1)) {
|
|
/* we ended up with offset on a page boundary */
|
|
*cd->offset = htonl(offset64 >> 32);
|
|
*cd->offset1 = htonl(offset64 & 0xffffffff);
|
|
cd->offset1 = NULL;
|
|
} else {
|
|
xdr_encode_hyper(cd->offset, offset64);
|
|
}
|
|
cd->offset = NULL;
|
|
}
|
|
|
|
/*
|
|
dprintk("encode_entry(%.*s @%ld%s)\n",
|
|
namlen, name, (long) offset, plus? " plus" : "");
|
|
*/
|
|
|
|
/* truncate filename if too long */
|
|
namlen = min(namlen, NFS3_MAXNAMLEN);
|
|
|
|
slen = XDR_QUADLEN(namlen);
|
|
elen = slen + NFS3_ENTRY_BAGGAGE
|
|
+ (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
|
|
|
|
if (cd->buflen < elen) {
|
|
cd->common.err = nfserr_toosmall;
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* determine which page in rq_respages[] we are currently filling */
|
|
for (page = cd->rqstp->rq_respages + 1;
|
|
page < cd->rqstp->rq_next_page; page++) {
|
|
curr_page_addr = page_address(*page);
|
|
|
|
if (((caddr_t)cd->buffer >= curr_page_addr) &&
|
|
((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
|
|
break;
|
|
}
|
|
|
|
if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
|
|
/* encode entry in current page */
|
|
|
|
p = encode_entry_baggage(cd, p, name, namlen, ino);
|
|
|
|
if (plus)
|
|
p = encode_entryplus_baggage(cd, p, name, namlen, ino);
|
|
num_entry_words = p - cd->buffer;
|
|
} else if (*(page+1) != NULL) {
|
|
/* temporarily encode entry into next page, then move back to
|
|
* current and next page in rq_respages[] */
|
|
__be32 *p1, *tmp;
|
|
int len1, len2;
|
|
|
|
/* grab next page for temporary storage of entry */
|
|
p1 = tmp = page_address(*(page+1));
|
|
|
|
p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
|
|
|
|
if (plus)
|
|
p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
|
|
|
|
/* determine entry word length and lengths to go in pages */
|
|
num_entry_words = p1 - tmp;
|
|
len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
|
|
if ((num_entry_words << 2) < len1) {
|
|
/* the actual number of words in the entry is less
|
|
* than elen and can still fit in the current page
|
|
*/
|
|
memmove(p, tmp, num_entry_words << 2);
|
|
p += num_entry_words;
|
|
|
|
/* update offset */
|
|
cd->offset = cd->buffer + (cd->offset - tmp);
|
|
} else {
|
|
unsigned int offset_r = (cd->offset - tmp) << 2;
|
|
|
|
/* update pointer to offset location.
|
|
* This is a 64bit quantity, so we need to
|
|
* deal with 3 cases:
|
|
* - entirely in first page
|
|
* - entirely in second page
|
|
* - 4 bytes in each page
|
|
*/
|
|
if (offset_r + 8 <= len1) {
|
|
cd->offset = p + (cd->offset - tmp);
|
|
} else if (offset_r >= len1) {
|
|
cd->offset -= len1 >> 2;
|
|
} else {
|
|
/* sitting on the fence */
|
|
BUG_ON(offset_r != len1 - 4);
|
|
cd->offset = p + (cd->offset - tmp);
|
|
cd->offset1 = tmp;
|
|
}
|
|
|
|
len2 = (num_entry_words << 2) - len1;
|
|
|
|
/* move from temp page to current and next pages */
|
|
memmove(p, tmp, len1);
|
|
memmove(tmp, (caddr_t)tmp+len1, len2);
|
|
|
|
p = tmp + (len2 >> 2);
|
|
}
|
|
}
|
|
else {
|
|
cd->common.err = nfserr_toosmall;
|
|
return -EINVAL;
|
|
}
|
|
|
|
cd->buflen -= num_entry_words;
|
|
cd->buffer = p;
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
|
|
}
|
|
|
|
int
|
|
nfs3svc_encode_entry(void *cd, const char *name,
|
|
int namlen, loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
|
|
}
|
|
|
|
int
|
|
nfs3svc_encode_entry_plus(void *cd, const char *name,
|
|
int namlen, loff_t offset, u64 ino,
|
|
unsigned int d_type)
|
|
{
|
|
return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
|
|
}
|
|
|
|
static bool
|
|
svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
|
|
const struct nfsd3_fsstatres *resp)
|
|
{
|
|
const struct kstatfs *s = &resp->stats;
|
|
u64 bs = s->f_bsize;
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, XDR_UNIT * 13);
|
|
if (!p)
|
|
return false;
|
|
p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
|
|
p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
|
|
p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
|
|
p = xdr_encode_hyper(p, s->f_files); /* total inodes */
|
|
p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
|
|
p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
|
|
*p = cpu_to_be32(resp->invarsec); /* mean unchanged time */
|
|
|
|
return true;
|
|
}
|
|
|
|
/* FSSTAT */
|
|
int
|
|
nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_res_stream;
|
|
struct nfsd3_fsstatres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return 0;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return 0;
|
|
if (!svcxdr_encode_fsstat3resok(xdr, resp))
|
|
return 0;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* FSINFO */
|
|
int
|
|
nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
|
|
|
|
*p++ = resp->status;
|
|
*p++ = xdr_zero; /* no post_op_attr */
|
|
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->f_rtmax);
|
|
*p++ = htonl(resp->f_rtpref);
|
|
*p++ = htonl(resp->f_rtmult);
|
|
*p++ = htonl(resp->f_wtmax);
|
|
*p++ = htonl(resp->f_wtpref);
|
|
*p++ = htonl(resp->f_wtmult);
|
|
*p++ = htonl(resp->f_dtpref);
|
|
p = xdr_encode_hyper(p, resp->f_maxfilesize);
|
|
*p++ = xdr_one;
|
|
*p++ = xdr_zero;
|
|
*p++ = htonl(resp->f_properties);
|
|
}
|
|
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* PATHCONF */
|
|
int
|
|
nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct nfsd3_pathconfres *resp = rqstp->rq_resp;
|
|
|
|
*p++ = resp->status;
|
|
*p++ = xdr_zero; /* no post_op_attr */
|
|
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->p_link_max);
|
|
*p++ = htonl(resp->p_name_max);
|
|
*p++ = htonl(resp->p_no_trunc);
|
|
*p++ = htonl(resp->p_chown_restricted);
|
|
*p++ = htonl(resp->p_case_insensitive);
|
|
*p++ = htonl(resp->p_case_preserving);
|
|
}
|
|
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* COMMIT */
|
|
int
|
|
nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p)
|
|
{
|
|
struct nfsd3_commitres *resp = rqstp->rq_resp;
|
|
|
|
*p++ = resp->status;
|
|
p = encode_wcc_data(rqstp, p, &resp->fh);
|
|
/* Write verifier */
|
|
if (resp->status == 0) {
|
|
*p++ = resp->verf[0];
|
|
*p++ = resp->verf[1];
|
|
}
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/*
|
|
* XDR release functions
|
|
*/
|
|
void
|
|
nfs3svc_release_fhandle(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
fh_put(&resp->fh);
|
|
}
|
|
|
|
void
|
|
nfs3svc_release_fhandle2(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_fhandle_pair *resp = rqstp->rq_resp;
|
|
|
|
fh_put(&resp->fh1);
|
|
fh_put(&resp->fh2);
|
|
}
|