1355 lines
31 KiB
C
1355 lines
31 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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/*
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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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* time_delta. {1, 0} means the server is accurate only
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* to the nearest second.
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*/
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static const struct timespec64 nfs3svc_time_delta = {
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.tv_sec = 1,
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.tv_nsec = 0,
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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_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_raw, p, size);
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return true;
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}
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/**
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* svcxdr_encode_nfsstat3 - Encode an NFSv3 status code
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* @xdr: XDR stream
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* @status: status value to encode
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*
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* Return values:
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* %false: Send buffer space was exhausted
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* %true: Success
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*/
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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_raw, 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 bool
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svcxdr_encode_cookieverf3(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_COOKIEVERFSIZE);
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if (!p)
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return false;
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memcpy(p, verf, NFS3_COOKIEVERFSIZE);
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return true;
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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 = newsize;
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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 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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/**
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* svcxdr_encode_post_op_attr - Encode NFSv3 post-op attributes
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* @rqstp: Context of a completed RPC transaction
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* @xdr: XDR stream
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* @fhp: File handle to encode
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*
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* Return values:
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* %false: Send buffer space was exhausted
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* %true: Success
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*/
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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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/*
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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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|
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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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|
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return true;
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|
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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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/*
|
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* Encode weak cache consistency data
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*/
|
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static bool
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svcxdr_encode_wcc_data(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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|
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if (!dentry || !d_really_is_positive(dentry) || !fhp->fh_post_saved)
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goto neither;
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|
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/* before */
|
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if (!svcxdr_encode_pre_op_attr(xdr, fhp))
|
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return false;
|
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|
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/* after */
|
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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_fattr3(rqstp, xdr, fhp, &fhp->fh_post_attr))
|
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return false;
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|
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return true;
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neither:
|
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if (xdr_stream_encode_item_absent(xdr) < 0)
|
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return false;
|
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if (!svcxdr_encode_post_op_attr(rqstp, xdr, fhp))
|
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return false;
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|
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return true;
|
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}
|
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|
|
/*
|
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* XDR decode functions
|
|
*/
|
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|
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bool
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nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd_fhandle *args = rqstp->rq_argp;
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|
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return svcxdr_decode_nfs_fh3(xdr, &args->fh);
|
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}
|
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|
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bool
|
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nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_sattrargs *args = rqstp->rq_argp;
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|
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return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
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svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
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svcxdr_decode_sattrguard3(xdr, args);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_diropargs *args = rqstp->rq_argp;
|
|
|
|
return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_accessargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->access) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_writeargs *args = rqstp->rq_argp;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->stable) < 0)
|
|
return false;
|
|
|
|
/* opaque data */
|
|
if (xdr_stream_decode_u32(xdr, &args->len) < 0)
|
|
return false;
|
|
|
|
/* request sanity */
|
|
if (args->count != args->len)
|
|
return false;
|
|
if (args->count > max_blocksize) {
|
|
args->count = max_blocksize;
|
|
args->len = max_blocksize;
|
|
}
|
|
|
|
return xdr_stream_subsegment(xdr, &args->payload, args->count);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_createargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
|
|
return false;
|
|
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 false;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
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);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_symlinkargs *args = rqstp->rq_argp;
|
|
struct kvec *head = rqstp->rq_arg.head;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
|
|
return false;
|
|
if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
|
|
return false;
|
|
|
|
/* symlink_data */
|
|
args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
|
|
args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
|
|
return args->first.iov_base != NULL;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_mknodargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
|
|
return false;
|
|
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 false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
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);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
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);
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readdirargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
|
|
return false;
|
|
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
|
|
if (!args->verf)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readdirargs *args = rqstp->rq_argp;
|
|
u32 dircount;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
|
|
return false;
|
|
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
|
|
if (!args->verf)
|
|
return false;
|
|
/* dircount is ignored */
|
|
if (xdr_stream_decode_u32(xdr, &dircount) < 0)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_commitargs *args = rqstp->rq_argp;
|
|
|
|
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
|
|
return false;
|
|
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
|
|
return false;
|
|
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* XDR encode functions
|
|
*/
|
|
|
|
/* GETATTR */
|
|
bool
|
|
nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
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 false;
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* SETATTR, REMOVE, RMDIR */
|
|
bool
|
|
nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
|
|
svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
|
|
}
|
|
|
|
/* LOOKUP */
|
|
bool
|
|
nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_diropres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* ACCESS */
|
|
bool
|
|
nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_accessres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->access) < 0)
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* READLINK */
|
|
bool
|
|
nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
|
|
struct kvec *head = rqstp->rq_res.head;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->len) < 0)
|
|
return false;
|
|
xdr_write_pages(xdr, resp->pages, 0, resp->len);
|
|
if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* READ */
|
|
bool
|
|
nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readres *resp = rqstp->rq_resp;
|
|
struct kvec *head = rqstp->rq_res.head;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return false;
|
|
if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return false;
|
|
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 false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* WRITE */
|
|
bool
|
|
nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_writeres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
|
|
return false;
|
|
if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
|
|
return false;
|
|
if (!svcxdr_encode_writeverf3(xdr, resp->verf))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* CREATE, MKDIR, SYMLINK, MKNOD */
|
|
bool
|
|
nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_diropres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* RENAME */
|
|
bool
|
|
nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
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 */
|
|
bool
|
|
nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
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 */
|
|
bool
|
|
nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_readdirres *resp = rqstp->rq_resp;
|
|
struct xdr_buf *dirlist = &resp->dirlist;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_cookieverf3(xdr, resp->verf))
|
|
return false;
|
|
xdr_write_pages(xdr, dirlist->pages, 0, dirlist->len);
|
|
/* no more entries */
|
|
if (xdr_stream_encode_item_absent(xdr) < 0)
|
|
return false;
|
|
if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* nfs3svc_encode_cookie3 - Encode a directory offset cookie
|
|
* @resp: readdir result context
|
|
* @offset: offset cookie to encode
|
|
*
|
|
* The buffer space for the offset cookie has already been reserved
|
|
* by svcxdr_encode_entry3_common().
|
|
*/
|
|
void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset)
|
|
{
|
|
__be64 cookie = cpu_to_be64(offset);
|
|
|
|
if (!resp->cookie_offset)
|
|
return;
|
|
write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
|
|
sizeof(cookie));
|
|
resp->cookie_offset = 0;
|
|
}
|
|
|
|
static bool
|
|
svcxdr_encode_entry3_common(struct nfsd3_readdirres *resp, const char *name,
|
|
int namlen, loff_t offset, u64 ino)
|
|
{
|
|
struct xdr_buf *dirlist = &resp->dirlist;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
if (xdr_stream_encode_item_present(xdr) < 0)
|
|
return false;
|
|
/* fileid */
|
|
if (xdr_stream_encode_u64(xdr, ino) < 0)
|
|
return false;
|
|
/* name */
|
|
if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS3_MAXNAMLEN)) < 0)
|
|
return false;
|
|
/* cookie */
|
|
resp->cookie_offset = dirlist->len;
|
|
if (xdr_stream_encode_u64(xdr, OFFSET_MAX) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* nfs3svc_encode_entry3 - encode one NFSv3 READDIR entry
|
|
* @data: directory context
|
|
* @name: name of the object to be encoded
|
|
* @namlen: length of that name, in bytes
|
|
* @offset: the offset of the previous entry
|
|
* @ino: the fileid of this entry
|
|
* @d_type: unused
|
|
*
|
|
* Return values:
|
|
* %0: Entry was successfully encoded.
|
|
* %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
|
|
*
|
|
* On exit, the following fields are updated:
|
|
* - resp->xdr
|
|
* - resp->common.err
|
|
* - resp->cookie_offset
|
|
*/
|
|
int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct readdir_cd *ccd = data;
|
|
struct nfsd3_readdirres *resp = container_of(ccd,
|
|
struct nfsd3_readdirres,
|
|
common);
|
|
unsigned int starting_length = resp->dirlist.len;
|
|
|
|
/* The offset cookie for the previous entry */
|
|
nfs3svc_encode_cookie3(resp, offset);
|
|
|
|
if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
|
|
goto out_toosmall;
|
|
|
|
xdr_commit_encode(&resp->xdr);
|
|
resp->common.err = nfs_ok;
|
|
return 0;
|
|
|
|
out_toosmall:
|
|
resp->cookie_offset = 0;
|
|
resp->common.err = nfserr_toosmall;
|
|
resp->dirlist.len = starting_length;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static bool
|
|
svcxdr_encode_entry3_plus(struct nfsd3_readdirres *resp, const char *name,
|
|
int namlen, u64 ino)
|
|
{
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
struct svc_fh *fhp = &resp->scratch;
|
|
bool result;
|
|
|
|
result = false;
|
|
fh_init(fhp, NFS3_FHSIZE);
|
|
if (compose_entry_fh(resp, fhp, name, namlen, ino) != nfs_ok)
|
|
goto out_noattrs;
|
|
|
|
if (!svcxdr_encode_post_op_attr(resp->rqstp, xdr, fhp))
|
|
goto out;
|
|
if (!svcxdr_encode_post_op_fh3(xdr, fhp))
|
|
goto out;
|
|
result = true;
|
|
|
|
out:
|
|
fh_put(fhp);
|
|
return result;
|
|
|
|
out_noattrs:
|
|
if (xdr_stream_encode_item_absent(xdr) < 0)
|
|
return false;
|
|
if (xdr_stream_encode_item_absent(xdr) < 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* nfs3svc_encode_entryplus3 - encode one NFSv3 READDIRPLUS entry
|
|
* @data: directory context
|
|
* @name: name of the object to be encoded
|
|
* @namlen: length of that name, in bytes
|
|
* @offset: the offset of the previous entry
|
|
* @ino: the fileid of this entry
|
|
* @d_type: unused
|
|
*
|
|
* Return values:
|
|
* %0: Entry was successfully encoded.
|
|
* %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
|
|
*
|
|
* On exit, the following fields are updated:
|
|
* - resp->xdr
|
|
* - resp->common.err
|
|
* - resp->cookie_offset
|
|
*/
|
|
int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct readdir_cd *ccd = data;
|
|
struct nfsd3_readdirres *resp = container_of(ccd,
|
|
struct nfsd3_readdirres,
|
|
common);
|
|
unsigned int starting_length = resp->dirlist.len;
|
|
|
|
/* The offset cookie for the previous entry */
|
|
nfs3svc_encode_cookie3(resp, offset);
|
|
|
|
if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
|
|
goto out_toosmall;
|
|
if (!svcxdr_encode_entry3_plus(resp, name, namlen, ino))
|
|
goto out_toosmall;
|
|
|
|
xdr_commit_encode(&resp->xdr);
|
|
resp->common.err = nfs_ok;
|
|
return 0;
|
|
|
|
out_toosmall:
|
|
resp->cookie_offset = 0;
|
|
resp->common.err = nfserr_toosmall;
|
|
resp->dirlist.len = starting_length;
|
|
return -EINVAL;
|
|
}
|
|
|
|
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 */
|
|
bool
|
|
nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_fsstatres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
if (!svcxdr_encode_fsstat3resok(xdr, resp))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
|
|
const struct nfsd3_fsinfores *resp)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, XDR_UNIT * 12);
|
|
if (!p)
|
|
return false;
|
|
*p++ = cpu_to_be32(resp->f_rtmax);
|
|
*p++ = cpu_to_be32(resp->f_rtpref);
|
|
*p++ = cpu_to_be32(resp->f_rtmult);
|
|
*p++ = cpu_to_be32(resp->f_wtmax);
|
|
*p++ = cpu_to_be32(resp->f_wtpref);
|
|
*p++ = cpu_to_be32(resp->f_wtmult);
|
|
*p++ = cpu_to_be32(resp->f_dtpref);
|
|
p = xdr_encode_hyper(p, resp->f_maxfilesize);
|
|
p = encode_nfstime3(p, &nfs3svc_time_delta);
|
|
*p = cpu_to_be32(resp->f_properties);
|
|
|
|
return true;
|
|
}
|
|
|
|
/* FSINFO */
|
|
bool
|
|
nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
if (!svcxdr_encode_fsinfo3resok(xdr, resp))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
|
|
const struct nfsd3_pathconfres *resp)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, XDR_UNIT * 6);
|
|
if (!p)
|
|
return false;
|
|
*p++ = cpu_to_be32(resp->p_link_max);
|
|
*p++ = cpu_to_be32(resp->p_name_max);
|
|
p = xdr_encode_bool(p, resp->p_no_trunc);
|
|
p = xdr_encode_bool(p, resp->p_chown_restricted);
|
|
p = xdr_encode_bool(p, resp->p_case_insensitive);
|
|
xdr_encode_bool(p, resp->p_case_preserving);
|
|
|
|
return true;
|
|
}
|
|
|
|
/* PATHCONF */
|
|
bool
|
|
nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_pathconfres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
if (!svcxdr_encode_pathconf3resok(xdr, resp))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* COMMIT */
|
|
bool
|
|
nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
|
|
{
|
|
struct nfsd3_commitres *resp = rqstp->rq_resp;
|
|
|
|
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
|
|
return false;
|
|
switch (resp->status) {
|
|
case nfs_ok:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
if (!svcxdr_encode_writeverf3(xdr, resp->verf))
|
|
return false;
|
|
break;
|
|
default:
|
|
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|