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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7e06b7f9e9
We're trying to read and write from a struct file that we may not hold a reference to any more (since a close could be processed as soon as we drop the state lock). Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1003 lines
28 KiB
C
1003 lines
28 KiB
C
/*
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* fs/nfsd/nfs4proc.c
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*
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* Server-side procedures for NFSv4.
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*
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* Copyright (c) 2002 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Kendrick Smith <kmsmith@umich.edu>
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Note: some routines in this file are just trivial wrappers
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* (e.g. nfsd4_lookup()) defined solely for the sake of consistent
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* naming. Since all such routines have been declared "inline",
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* there shouldn't be any associated overhead. At some point in
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* the future, I might inline these "by hand" to clean up a
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* little.
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*/
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#include <linux/param.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/cache.h>
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#include <linux/nfs4.h>
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#include <linux/nfsd/state.h>
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#include <linux/nfsd/xdr4.h>
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#include <linux/nfs4_acl.h>
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#define NFSDDBG_FACILITY NFSDDBG_PROC
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static inline void
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fh_dup2(struct svc_fh *dst, struct svc_fh *src)
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{
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fh_put(dst);
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dget(src->fh_dentry);
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if (src->fh_export)
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cache_get(&src->fh_export->h);
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*dst = *src;
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}
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static int
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do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
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{
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int accmode, status;
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if (open->op_truncate &&
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!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
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return nfserr_inval;
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accmode = MAY_NOP;
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if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
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accmode = MAY_READ;
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if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
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accmode |= (MAY_WRITE | MAY_TRUNC);
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accmode |= MAY_OWNER_OVERRIDE;
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status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
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return status;
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}
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static int
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do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
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{
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struct svc_fh resfh;
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int status;
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fh_init(&resfh, NFS4_FHSIZE);
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open->op_truncate = 0;
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if (open->op_create) {
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/*
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* Note: create modes (UNCHECKED,GUARDED...) are the same
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* in NFSv4 as in v3.
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*/
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status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
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open->op_fname.len, &open->op_iattr,
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&resfh, open->op_createmode,
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(u32 *)open->op_verf.data, &open->op_truncate);
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}
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else {
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status = nfsd_lookup(rqstp, current_fh,
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open->op_fname.data, open->op_fname.len, &resfh);
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fh_unlock(current_fh);
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}
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if (!status) {
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set_change_info(&open->op_cinfo, current_fh);
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/* set reply cache */
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fh_dup2(current_fh, &resfh);
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open->op_stateowner->so_replay.rp_openfh_len =
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resfh.fh_handle.fh_size;
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memcpy(open->op_stateowner->so_replay.rp_openfh,
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&resfh.fh_handle.fh_base,
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resfh.fh_handle.fh_size);
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status = do_open_permission(rqstp, current_fh, open);
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}
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fh_put(&resfh);
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return status;
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}
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static int
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do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
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{
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int status;
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/* Only reclaims from previously confirmed clients are valid */
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if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
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return status;
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/* We don't know the target directory, and therefore can not
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* set the change info
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*/
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memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
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/* set replay cache */
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open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
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memcpy(open->op_stateowner->so_replay.rp_openfh,
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¤t_fh->fh_handle.fh_base,
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current_fh->fh_handle.fh_size);
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open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
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(open->op_iattr.ia_size == 0);
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status = do_open_permission(rqstp, current_fh, open);
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return status;
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}
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static inline int
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nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
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{
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int status;
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dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
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(int)open->op_fname.len, open->op_fname.data,
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open->op_stateowner);
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if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
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return nfserr_grace;
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if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
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return nfserr_no_grace;
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/* This check required by spec. */
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if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
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return nfserr_inval;
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nfs4_lock_state();
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/* check seqid for replay. set nfs4_owner */
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status = nfsd4_process_open1(open);
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if (status == NFSERR_REPLAY_ME) {
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struct nfs4_replay *rp = &open->op_stateowner->so_replay;
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fh_put(current_fh);
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current_fh->fh_handle.fh_size = rp->rp_openfh_len;
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memcpy(¤t_fh->fh_handle.fh_base, rp->rp_openfh,
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rp->rp_openfh_len);
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status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
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if (status)
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dprintk("nfsd4_open: replay failed"
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" restoring previous filehandle\n");
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else
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status = NFSERR_REPLAY_ME;
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}
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if (status)
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goto out;
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switch (open->op_claim_type) {
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case NFS4_OPEN_CLAIM_DELEGATE_CUR:
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status = nfserr_inval;
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if (open->op_create)
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goto out;
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/* fall through */
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case NFS4_OPEN_CLAIM_NULL:
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/*
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* (1) set CURRENT_FH to the file being opened,
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* creating it if necessary, (2) set open->op_cinfo,
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* (3) set open->op_truncate if the file is to be
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* truncated after opening, (4) do permission checking.
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*/
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status = do_open_lookup(rqstp, current_fh, open);
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if (status)
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goto out;
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break;
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case NFS4_OPEN_CLAIM_PREVIOUS:
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/*
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* The CURRENT_FH is already set to the file being
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* opened. (1) set open->op_cinfo, (2) set
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* open->op_truncate if the file is to be truncated
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* after opening, (3) do permission checking.
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*/
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status = do_open_fhandle(rqstp, current_fh, open);
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if (status)
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goto out;
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break;
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case NFS4_OPEN_CLAIM_DELEGATE_PREV:
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printk("NFSD: unsupported OPEN claim type %d\n",
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open->op_claim_type);
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status = nfserr_notsupp;
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goto out;
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default:
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printk("NFSD: Invalid OPEN claim type %d\n",
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open->op_claim_type);
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status = nfserr_inval;
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goto out;
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}
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/*
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* nfsd4_process_open2() does the actual opening of the file. If
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* successful, it (1) truncates the file if open->op_truncate was
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* set, (2) sets open->op_stateid, (3) sets open->op_delegation.
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*/
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status = nfsd4_process_open2(rqstp, current_fh, open);
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out:
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if (open->op_stateowner)
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nfs4_get_stateowner(open->op_stateowner);
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nfs4_unlock_state();
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return status;
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}
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/*
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* filehandle-manipulating ops.
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*/
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static inline int
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nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
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{
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if (!current_fh->fh_dentry)
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return nfserr_nofilehandle;
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*getfh = current_fh;
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return nfs_ok;
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}
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static inline int
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nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
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{
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fh_put(current_fh);
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current_fh->fh_handle.fh_size = putfh->pf_fhlen;
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memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
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return fh_verify(rqstp, current_fh, 0, MAY_NOP);
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}
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static inline int
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nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
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{
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int status;
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fh_put(current_fh);
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status = exp_pseudoroot(rqstp->rq_client, current_fh,
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&rqstp->rq_chandle);
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if (!status)
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status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
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return status;
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}
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static inline int
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nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
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{
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if (!save_fh->fh_dentry)
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return nfserr_restorefh;
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fh_dup2(current_fh, save_fh);
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return nfs_ok;
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}
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static inline int
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nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
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{
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if (!current_fh->fh_dentry)
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return nfserr_nofilehandle;
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fh_dup2(save_fh, current_fh);
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return nfs_ok;
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}
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/*
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* misc nfsv4 ops
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*/
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static inline int
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nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
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{
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if (access->ac_req_access & ~NFS3_ACCESS_FULL)
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return nfserr_inval;
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access->ac_resp_access = access->ac_req_access;
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return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
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}
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static inline int
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nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
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{
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int status;
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u32 *p = (u32 *)commit->co_verf.data;
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*p++ = nfssvc_boot.tv_sec;
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*p++ = nfssvc_boot.tv_usec;
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status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
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if (status == nfserr_symlink)
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status = nfserr_inval;
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return status;
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}
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static int
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nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
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{
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struct svc_fh resfh;
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int status;
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dev_t rdev;
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fh_init(&resfh, NFS4_FHSIZE);
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status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
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if (status == nfserr_symlink)
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status = nfserr_notdir;
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if (status)
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return status;
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switch (create->cr_type) {
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case NF4LNK:
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/* ugh! we have to null-terminate the linktext, or
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* vfs_symlink() will choke. it is always safe to
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* null-terminate by brute force, since at worst we
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* will overwrite the first byte of the create namelen
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* in the XDR buffer, which has already been extracted
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* during XDR decode.
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*/
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create->cr_linkname[create->cr_linklen] = 0;
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status = nfsd_symlink(rqstp, current_fh, create->cr_name,
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create->cr_namelen, create->cr_linkname,
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create->cr_linklen, &resfh, &create->cr_iattr);
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break;
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case NF4BLK:
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rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
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if (MAJOR(rdev) != create->cr_specdata1 ||
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MINOR(rdev) != create->cr_specdata2)
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return nfserr_inval;
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status = nfsd_create(rqstp, current_fh, create->cr_name,
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create->cr_namelen, &create->cr_iattr,
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S_IFBLK, rdev, &resfh);
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break;
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|
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case NF4CHR:
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rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
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if (MAJOR(rdev) != create->cr_specdata1 ||
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MINOR(rdev) != create->cr_specdata2)
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return nfserr_inval;
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status = nfsd_create(rqstp, current_fh, create->cr_name,
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create->cr_namelen, &create->cr_iattr,
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S_IFCHR, rdev, &resfh);
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break;
|
|
|
|
case NF4SOCK:
|
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status = nfsd_create(rqstp, current_fh, create->cr_name,
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create->cr_namelen, &create->cr_iattr,
|
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S_IFSOCK, 0, &resfh);
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break;
|
|
|
|
case NF4FIFO:
|
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status = nfsd_create(rqstp, current_fh, create->cr_name,
|
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create->cr_namelen, &create->cr_iattr,
|
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S_IFIFO, 0, &resfh);
|
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break;
|
|
|
|
case NF4DIR:
|
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create->cr_iattr.ia_valid &= ~ATTR_SIZE;
|
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status = nfsd_create(rqstp, current_fh, create->cr_name,
|
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create->cr_namelen, &create->cr_iattr,
|
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S_IFDIR, 0, &resfh);
|
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break;
|
|
|
|
default:
|
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status = nfserr_badtype;
|
|
}
|
|
|
|
if (!status) {
|
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fh_unlock(current_fh);
|
|
set_change_info(&create->cr_cinfo, current_fh);
|
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fh_dup2(current_fh, &resfh);
|
|
}
|
|
|
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fh_put(&resfh);
|
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return status;
|
|
}
|
|
|
|
static inline int
|
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nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
|
|
{
|
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int status;
|
|
|
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status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
if (status)
|
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return status;
|
|
|
|
if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
|
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return nfserr_inval;
|
|
|
|
getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
|
|
getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
|
|
|
|
getattr->ga_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
|
|
struct svc_fh *save_fh, struct nfsd4_link *link)
|
|
{
|
|
int status = nfserr_nofilehandle;
|
|
|
|
if (!save_fh->fh_dentry)
|
|
return status;
|
|
status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
|
|
if (!status)
|
|
set_change_info(&link->li_cinfo, current_fh);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
|
|
{
|
|
struct svc_fh tmp_fh;
|
|
int ret;
|
|
|
|
fh_init(&tmp_fh, NFS4_FHSIZE);
|
|
if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
|
|
&rqstp->rq_chandle)) != 0)
|
|
return ret;
|
|
if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
|
|
fh_put(&tmp_fh);
|
|
return nfserr_noent;
|
|
}
|
|
fh_put(&tmp_fh);
|
|
return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
|
|
{
|
|
return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
|
|
{
|
|
int status;
|
|
|
|
/* no need to check permission - this will be done in nfsd_read() */
|
|
|
|
read->rd_filp = NULL;
|
|
if (read->rd_offset >= OFFSET_MAX)
|
|
return nfserr_inval;
|
|
|
|
nfs4_lock_state();
|
|
/* check stateid */
|
|
if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
|
|
CHECK_FH | RD_STATE, &read->rd_filp))) {
|
|
dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
|
|
goto out;
|
|
}
|
|
if (read->rd_filp)
|
|
get_file(read->rd_filp);
|
|
status = nfs_ok;
|
|
out:
|
|
nfs4_unlock_state();
|
|
read->rd_rqstp = rqstp;
|
|
read->rd_fhp = current_fh;
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
|
|
{
|
|
u64 cookie = readdir->rd_cookie;
|
|
static const nfs4_verifier zeroverf;
|
|
|
|
/* no need to check permission - this will be done in nfsd_readdir() */
|
|
|
|
if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
|
|
return nfserr_inval;
|
|
|
|
readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
|
|
readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
|
|
|
|
if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
|
|
(cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
|
|
return nfserr_bad_cookie;
|
|
|
|
readdir->rd_rqstp = rqstp;
|
|
readdir->rd_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
|
|
{
|
|
readlink->rl_rqstp = rqstp;
|
|
readlink->rl_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
|
|
{
|
|
int status;
|
|
|
|
if (nfs4_in_grace())
|
|
return nfserr_grace;
|
|
status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
|
|
if (status == nfserr_symlink)
|
|
return nfserr_notdir;
|
|
if (!status) {
|
|
fh_unlock(current_fh);
|
|
set_change_info(&remove->rm_cinfo, current_fh);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
|
|
struct svc_fh *save_fh, struct nfsd4_rename *rename)
|
|
{
|
|
int status = nfserr_nofilehandle;
|
|
|
|
if (!save_fh->fh_dentry)
|
|
return status;
|
|
if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags
|
|
& NFSEXP_NOSUBTREECHECK))
|
|
return nfserr_grace;
|
|
status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
|
|
rename->rn_snamelen, current_fh,
|
|
rename->rn_tname, rename->rn_tnamelen);
|
|
|
|
/* the underlying filesystem returns different error's than required
|
|
* by NFSv4. both save_fh and current_fh have been verified.. */
|
|
if (status == nfserr_isdir)
|
|
status = nfserr_exist;
|
|
else if ((status == nfserr_notdir) &&
|
|
(S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
|
|
S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
|
|
status = nfserr_exist;
|
|
else if (status == nfserr_symlink)
|
|
status = nfserr_notdir;
|
|
|
|
if (!status) {
|
|
set_change_info(&rename->rn_sinfo, current_fh);
|
|
set_change_info(&rename->rn_tinfo, save_fh);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
|
|
{
|
|
int status = nfs_ok;
|
|
|
|
if (!current_fh->fh_dentry)
|
|
return nfserr_nofilehandle;
|
|
|
|
status = nfs_ok;
|
|
if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
|
|
nfs4_lock_state();
|
|
if ((status = nfs4_preprocess_stateid_op(current_fh,
|
|
&setattr->sa_stateid,
|
|
CHECK_FH | WR_STATE, NULL))) {
|
|
dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
|
|
goto out_unlock;
|
|
}
|
|
nfs4_unlock_state();
|
|
}
|
|
status = nfs_ok;
|
|
if (setattr->sa_acl != NULL)
|
|
status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
|
|
if (status)
|
|
goto out;
|
|
status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
|
|
0, (time_t)0);
|
|
out:
|
|
return status;
|
|
out_unlock:
|
|
nfs4_unlock_state();
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
|
|
{
|
|
stateid_t *stateid = &write->wr_stateid;
|
|
struct file *filp = NULL;
|
|
u32 *p;
|
|
int status = nfs_ok;
|
|
|
|
/* no need to check permission - this will be done in nfsd_write() */
|
|
|
|
if (write->wr_offset >= OFFSET_MAX)
|
|
return nfserr_inval;
|
|
|
|
nfs4_lock_state();
|
|
if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
|
|
CHECK_FH | WR_STATE, &filp))) {
|
|
dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
|
|
goto out;
|
|
}
|
|
if (filp)
|
|
get_file(filp);
|
|
nfs4_unlock_state();
|
|
|
|
write->wr_bytes_written = write->wr_buflen;
|
|
write->wr_how_written = write->wr_stable_how;
|
|
p = (u32 *)write->wr_verifier.data;
|
|
*p++ = nfssvc_boot.tv_sec;
|
|
*p++ = nfssvc_boot.tv_usec;
|
|
|
|
status = nfsd_write(rqstp, current_fh, filp, write->wr_offset,
|
|
write->wr_vec, write->wr_vlen, write->wr_buflen,
|
|
&write->wr_how_written);
|
|
if (filp)
|
|
fput(filp);
|
|
|
|
if (status == nfserr_symlink)
|
|
status = nfserr_inval;
|
|
return status;
|
|
out:
|
|
nfs4_unlock_state();
|
|
return status;
|
|
}
|
|
|
|
/* This routine never returns NFS_OK! If there are no other errors, it
|
|
* will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
|
|
* attributes matched. VERIFY is implemented by mapping NFSERR_SAME
|
|
* to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
|
|
*/
|
|
static int
|
|
nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
|
|
{
|
|
u32 *buf, *p;
|
|
int count;
|
|
int status;
|
|
|
|
status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
if (status)
|
|
return status;
|
|
|
|
if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
|
|
|| (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
|
|
return nfserr_attrnotsupp;
|
|
if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
|
|
|| (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
|
|
return nfserr_inval;
|
|
if (verify->ve_attrlen & 3)
|
|
return nfserr_inval;
|
|
|
|
/* count in words:
|
|
* bitmap_len(1) + bitmap(2) + attr_len(1) = 4
|
|
*/
|
|
count = 4 + (verify->ve_attrlen >> 2);
|
|
buf = kmalloc(count << 2, GFP_KERNEL);
|
|
if (!buf)
|
|
return nfserr_resource;
|
|
|
|
status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
|
|
current_fh->fh_dentry, buf,
|
|
&count, verify->ve_bmval,
|
|
rqstp);
|
|
|
|
/* this means that nfsd4_encode_fattr() ran out of space */
|
|
if (status == nfserr_resource && count == 0)
|
|
status = nfserr_not_same;
|
|
if (status)
|
|
goto out_kfree;
|
|
|
|
p = buf + 3;
|
|
status = nfserr_not_same;
|
|
if (ntohl(*p++) != verify->ve_attrlen)
|
|
goto out_kfree;
|
|
if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
|
|
status = nfserr_same;
|
|
|
|
out_kfree:
|
|
kfree(buf);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* NULL call.
|
|
*/
|
|
static int
|
|
nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
|
|
{
|
|
return nfs_ok;
|
|
}
|
|
|
|
|
|
/*
|
|
* COMPOUND call.
|
|
*/
|
|
static int
|
|
nfsd4_proc_compound(struct svc_rqst *rqstp,
|
|
struct nfsd4_compoundargs *args,
|
|
struct nfsd4_compoundres *resp)
|
|
{
|
|
struct nfsd4_op *op;
|
|
struct svc_fh *current_fh = NULL;
|
|
struct svc_fh *save_fh = NULL;
|
|
struct nfs4_stateowner *replay_owner = NULL;
|
|
int slack_space; /* in words, not bytes! */
|
|
int status;
|
|
|
|
status = nfserr_resource;
|
|
current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
|
|
if (current_fh == NULL)
|
|
goto out;
|
|
fh_init(current_fh, NFS4_FHSIZE);
|
|
save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
|
|
if (save_fh == NULL)
|
|
goto out;
|
|
fh_init(save_fh, NFS4_FHSIZE);
|
|
|
|
resp->xbuf = &rqstp->rq_res;
|
|
resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
|
|
resp->tagp = resp->p;
|
|
/* reserve space for: taglen, tag, and opcnt */
|
|
resp->p += 2 + XDR_QUADLEN(args->taglen);
|
|
resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
|
|
resp->taglen = args->taglen;
|
|
resp->tag = args->tag;
|
|
resp->opcnt = 0;
|
|
resp->rqstp = rqstp;
|
|
|
|
/*
|
|
* According to RFC3010, this takes precedence over all other errors.
|
|
*/
|
|
status = nfserr_minor_vers_mismatch;
|
|
if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
|
|
goto out;
|
|
|
|
status = nfs_ok;
|
|
while (!status && resp->opcnt < args->opcnt) {
|
|
op = &args->ops[resp->opcnt++];
|
|
|
|
/*
|
|
* The XDR decode routines may have pre-set op->status;
|
|
* for example, if there is a miscellaneous XDR error
|
|
* it will be set to nfserr_bad_xdr.
|
|
*/
|
|
if (op->status)
|
|
goto encode_op;
|
|
|
|
/* We must be able to encode a successful response to
|
|
* this operation, with enough room left over to encode a
|
|
* failed response to the next operation. If we don't
|
|
* have enough room, fail with ERR_RESOURCE.
|
|
*/
|
|
/* FIXME - is slack_space *really* words, or bytes??? - neilb */
|
|
slack_space = (char *)resp->end - (char *)resp->p;
|
|
if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
|
|
BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
|
|
op->status = nfserr_resource;
|
|
goto encode_op;
|
|
}
|
|
|
|
/* All operations except RENEW, SETCLIENTID, RESTOREFH
|
|
* SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
|
|
* require a valid current filehandle
|
|
*
|
|
* SETATTR NOFILEHANDLE error handled in nfsd4_setattr
|
|
* due to required returned bitmap argument
|
|
*/
|
|
if ((!current_fh->fh_dentry) &&
|
|
!((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
|
|
(op->opnum == OP_SETCLIENTID) ||
|
|
(op->opnum == OP_SETCLIENTID_CONFIRM) ||
|
|
(op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
|
|
(op->opnum == OP_RELEASE_LOCKOWNER) ||
|
|
(op->opnum == OP_SETATTR))) {
|
|
op->status = nfserr_nofilehandle;
|
|
goto encode_op;
|
|
}
|
|
switch (op->opnum) {
|
|
case OP_ACCESS:
|
|
op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
|
|
break;
|
|
case OP_CLOSE:
|
|
op->status = nfsd4_close(rqstp, current_fh, &op->u.close);
|
|
replay_owner = op->u.close.cl_stateowner;
|
|
break;
|
|
case OP_COMMIT:
|
|
op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
|
|
break;
|
|
case OP_CREATE:
|
|
op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
|
|
break;
|
|
case OP_DELEGRETURN:
|
|
op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
|
|
break;
|
|
case OP_GETATTR:
|
|
op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
|
|
break;
|
|
case OP_GETFH:
|
|
op->status = nfsd4_getfh(current_fh, &op->u.getfh);
|
|
break;
|
|
case OP_LINK:
|
|
op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
|
|
break;
|
|
case OP_LOCK:
|
|
op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock);
|
|
replay_owner = op->u.lock.lk_stateowner;
|
|
break;
|
|
case OP_LOCKT:
|
|
op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
|
|
break;
|
|
case OP_LOCKU:
|
|
op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku);
|
|
replay_owner = op->u.locku.lu_stateowner;
|
|
break;
|
|
case OP_LOOKUP:
|
|
op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
|
|
break;
|
|
case OP_LOOKUPP:
|
|
op->status = nfsd4_lookupp(rqstp, current_fh);
|
|
break;
|
|
case OP_NVERIFY:
|
|
op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
|
|
if (op->status == nfserr_not_same)
|
|
op->status = nfs_ok;
|
|
break;
|
|
case OP_OPEN:
|
|
op->status = nfsd4_open(rqstp, current_fh, &op->u.open);
|
|
replay_owner = op->u.open.op_stateowner;
|
|
break;
|
|
case OP_OPEN_CONFIRM:
|
|
op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm);
|
|
replay_owner = op->u.open_confirm.oc_stateowner;
|
|
break;
|
|
case OP_OPEN_DOWNGRADE:
|
|
op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade);
|
|
replay_owner = op->u.open_downgrade.od_stateowner;
|
|
break;
|
|
case OP_PUTFH:
|
|
op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
|
|
break;
|
|
case OP_PUTROOTFH:
|
|
op->status = nfsd4_putrootfh(rqstp, current_fh);
|
|
break;
|
|
case OP_READ:
|
|
op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
|
|
break;
|
|
case OP_READDIR:
|
|
op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
|
|
break;
|
|
case OP_READLINK:
|
|
op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
|
|
break;
|
|
case OP_REMOVE:
|
|
op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
|
|
break;
|
|
case OP_RENAME:
|
|
op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
|
|
break;
|
|
case OP_RENEW:
|
|
op->status = nfsd4_renew(&op->u.renew);
|
|
break;
|
|
case OP_RESTOREFH:
|
|
op->status = nfsd4_restorefh(current_fh, save_fh);
|
|
break;
|
|
case OP_SAVEFH:
|
|
op->status = nfsd4_savefh(current_fh, save_fh);
|
|
break;
|
|
case OP_SETATTR:
|
|
op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
|
|
break;
|
|
case OP_SETCLIENTID:
|
|
op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
|
|
break;
|
|
case OP_SETCLIENTID_CONFIRM:
|
|
op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
|
|
break;
|
|
case OP_VERIFY:
|
|
op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
|
|
if (op->status == nfserr_same)
|
|
op->status = nfs_ok;
|
|
break;
|
|
case OP_WRITE:
|
|
op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
|
|
break;
|
|
case OP_RELEASE_LOCKOWNER:
|
|
op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
|
|
break;
|
|
default:
|
|
BUG_ON(op->status == nfs_ok);
|
|
break;
|
|
}
|
|
|
|
encode_op:
|
|
if (op->status == NFSERR_REPLAY_ME) {
|
|
op->replay = &replay_owner->so_replay;
|
|
nfsd4_encode_replay(resp, op);
|
|
status = op->status = op->replay->rp_status;
|
|
} else {
|
|
nfsd4_encode_operation(resp, op);
|
|
status = op->status;
|
|
}
|
|
if (replay_owner && (replay_owner != (void *)(-1))) {
|
|
nfs4_put_stateowner(replay_owner);
|
|
replay_owner = NULL;
|
|
}
|
|
/* XXX Ugh, we need to get rid of this kind of special case: */
|
|
if (op->opnum == OP_READ && op->u.read.rd_filp)
|
|
fput(op->u.read.rd_filp);
|
|
}
|
|
|
|
out:
|
|
nfsd4_release_compoundargs(args);
|
|
if (current_fh)
|
|
fh_put(current_fh);
|
|
kfree(current_fh);
|
|
if (save_fh)
|
|
fh_put(save_fh);
|
|
kfree(save_fh);
|
|
return status;
|
|
}
|
|
|
|
#define nfs4svc_decode_voidargs NULL
|
|
#define nfs4svc_release_void NULL
|
|
#define nfsd4_voidres nfsd4_voidargs
|
|
#define nfs4svc_release_compound NULL
|
|
struct nfsd4_voidargs { int dummy; };
|
|
|
|
#define PROC(name, argt, rest, relt, cache, respsize) \
|
|
{ (svc_procfunc) nfsd4_proc_##name, \
|
|
(kxdrproc_t) nfs4svc_decode_##argt##args, \
|
|
(kxdrproc_t) nfs4svc_encode_##rest##res, \
|
|
(kxdrproc_t) nfs4svc_release_##relt, \
|
|
sizeof(struct nfsd4_##argt##args), \
|
|
sizeof(struct nfsd4_##rest##res), \
|
|
0, \
|
|
cache, \
|
|
respsize, \
|
|
}
|
|
|
|
/*
|
|
* TODO: At the present time, the NFSv4 server does not do XID caching
|
|
* of requests. Implementing XID caching would not be a serious problem,
|
|
* although it would require a mild change in interfaces since one
|
|
* doesn't know whether an NFSv4 request is idempotent until after the
|
|
* XDR decode. However, XID caching totally confuses pynfs (Peter
|
|
* Astrand's regression testsuite for NFSv4 servers), which reuses
|
|
* XID's liberally, so I've left it unimplemented until pynfs generates
|
|
* better XID's.
|
|
*/
|
|
static struct svc_procedure nfsd_procedures4[2] = {
|
|
PROC(null, void, void, void, RC_NOCACHE, 1),
|
|
PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
|
|
};
|
|
|
|
struct svc_version nfsd_version4 = {
|
|
.vs_vers = 4,
|
|
.vs_nproc = 2,
|
|
.vs_proc = nfsd_procedures4,
|
|
.vs_dispatch = nfsd_dispatch,
|
|
.vs_xdrsize = NFS4_SVC_XDRSIZE,
|
|
};
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|