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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 05:56:39 +07:00
d50e61361c
A struct svc_fh is 320 bytes on x86_64, it'd be better not to have these on the stack. kmalloc'ing them probably isn't ideal either, but this is the simplest thing to do. If it turns out to be a problem in the readdir case then we could add a svc_fh to nfsd4_readdir and pass that in. Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
3747 lines
91 KiB
C
3747 lines
91 KiB
C
/*
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* Server-side XDR 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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* TODO: Neil Brown made the following observation: We currently
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* initially reserve NFSD_BUFSIZE space on the transmit queue and
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* never release any of that until the request is complete.
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* It would be good to calculate a new maximum response size while
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* decoding the COMPOUND, and call svc_reserve with this number
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* at the end of nfs4svc_decode_compoundargs.
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*/
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#include <linux/slab.h>
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#include <linux/namei.h>
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#include <linux/statfs.h>
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#include <linux/utsname.h>
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#include <linux/pagemap.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#include "idmap.h"
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#include "acl.h"
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#include "xdr4.h"
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#include "vfs.h"
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#include "state.h"
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#include "cache.h"
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#include "netns.h"
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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
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#include <linux/security.h>
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#endif
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#define NFSDDBG_FACILITY NFSDDBG_XDR
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/*
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* As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
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* directory in order to indicate to the client that a filesystem boundary is present
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* We use a fixed fsid for a referral
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*/
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#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
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#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
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static __be32
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check_filename(char *str, int len)
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{
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int i;
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if (len == 0)
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return nfserr_inval;
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if (isdotent(str, len))
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return nfserr_badname;
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for (i = 0; i < len; i++)
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if (str[i] == '/')
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return nfserr_badname;
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return 0;
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}
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#define DECODE_HEAD \
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__be32 *p; \
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__be32 status
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#define DECODE_TAIL \
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status = 0; \
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out: \
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return status; \
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xdr_error: \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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status = nfserr_bad_xdr; \
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goto out
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#define READ32(x) (x) = ntohl(*p++)
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#define READ64(x) do { \
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(x) = (u64)ntohl(*p++) << 32; \
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(x) |= ntohl(*p++); \
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} while (0)
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#define READMEM(x,nbytes) do { \
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x = (char *)p; \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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#define SAVEMEM(x,nbytes) do { \
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if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
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savemem(argp, p, nbytes) : \
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(char *)p)) { \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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goto xdr_error; \
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} \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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#define COPYMEM(x,nbytes) do { \
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memcpy((x), p, nbytes); \
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p += XDR_QUADLEN(nbytes); \
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} while (0)
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/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
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#define READ_BUF(nbytes) do { \
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if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
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p = argp->p; \
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argp->p += XDR_QUADLEN(nbytes); \
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} else if (!(p = read_buf(argp, nbytes))) { \
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dprintk("NFSD: xdr error (%s:%d)\n", \
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__FILE__, __LINE__); \
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goto xdr_error; \
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} \
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} while (0)
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static void next_decode_page(struct nfsd4_compoundargs *argp)
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{
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argp->p = page_address(argp->pagelist[0]);
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argp->pagelist++;
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if (argp->pagelen < PAGE_SIZE) {
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argp->end = argp->p + (argp->pagelen>>2);
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argp->pagelen = 0;
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} else {
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argp->end = argp->p + (PAGE_SIZE>>2);
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argp->pagelen -= PAGE_SIZE;
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}
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}
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static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
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{
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/* We want more bytes than seem to be available.
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* Maybe we need a new page, maybe we have just run out
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*/
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unsigned int avail = (char *)argp->end - (char *)argp->p;
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__be32 *p;
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if (avail + argp->pagelen < nbytes)
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return NULL;
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if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
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return NULL;
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/* ok, we can do it with the current plus the next page */
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if (nbytes <= sizeof(argp->tmp))
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p = argp->tmp;
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else {
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kfree(argp->tmpp);
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p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
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if (!p)
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return NULL;
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}
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/*
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* The following memcpy is safe because read_buf is always
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* called with nbytes > avail, and the two cases above both
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* guarantee p points to at least nbytes bytes.
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*/
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memcpy(p, argp->p, avail);
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next_decode_page(argp);
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memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
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argp->p += XDR_QUADLEN(nbytes - avail);
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return p;
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}
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static int zero_clientid(clientid_t *clid)
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{
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return (clid->cl_boot == 0) && (clid->cl_id == 0);
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}
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/**
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* defer_free - mark an allocation as deferred freed
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* @argp: NFSv4 compound argument structure to be freed with
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* @release: release callback to free @p, typically kfree()
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* @p: pointer to be freed
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*
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* Marks @p to be freed when processing the compound operation
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* described in @argp finishes.
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*/
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static int
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defer_free(struct nfsd4_compoundargs *argp,
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void (*release)(const void *), void *p)
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{
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struct tmpbuf *tb;
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tb = kmalloc(sizeof(*tb), GFP_KERNEL);
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if (!tb)
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return -ENOMEM;
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tb->buf = p;
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tb->release = release;
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tb->next = argp->to_free;
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argp->to_free = tb;
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return 0;
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}
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/**
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* savemem - duplicate a chunk of memory for later processing
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* @argp: NFSv4 compound argument structure to be freed with
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* @p: pointer to be duplicated
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* @nbytes: length to be duplicated
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*
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* Returns a pointer to a copy of @nbytes bytes of memory at @p
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* that are preserved until processing of the NFSv4 compound
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* operation described by @argp finishes.
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*/
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static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
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{
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if (p == argp->tmp) {
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p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
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if (!p)
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return NULL;
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} else {
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BUG_ON(p != argp->tmpp);
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argp->tmpp = NULL;
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}
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if (defer_free(argp, kfree, p)) {
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kfree(p);
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return NULL;
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} else
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return (char *)p;
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}
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static __be32
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nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
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{
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u32 bmlen;
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DECODE_HEAD;
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bmval[0] = 0;
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bmval[1] = 0;
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bmval[2] = 0;
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READ_BUF(4);
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READ32(bmlen);
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if (bmlen > 1000)
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goto xdr_error;
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READ_BUF(bmlen << 2);
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if (bmlen > 0)
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READ32(bmval[0]);
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if (bmlen > 1)
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READ32(bmval[1]);
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if (bmlen > 2)
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READ32(bmval[2]);
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DECODE_TAIL;
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}
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static __be32
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nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
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struct iattr *iattr, struct nfs4_acl **acl,
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struct xdr_netobj *label)
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{
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int expected_len, len = 0;
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u32 dummy32;
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char *buf;
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DECODE_HEAD;
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iattr->ia_valid = 0;
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if ((status = nfsd4_decode_bitmap(argp, bmval)))
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return status;
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READ_BUF(4);
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READ32(expected_len);
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if (bmval[0] & FATTR4_WORD0_SIZE) {
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READ_BUF(8);
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len += 8;
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READ64(iattr->ia_size);
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iattr->ia_valid |= ATTR_SIZE;
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}
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if (bmval[0] & FATTR4_WORD0_ACL) {
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u32 nace;
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struct nfs4_ace *ace;
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READ_BUF(4); len += 4;
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READ32(nace);
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if (nace > NFS4_ACL_MAX)
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return nfserr_resource;
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*acl = nfs4_acl_new(nace);
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if (*acl == NULL)
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return nfserr_jukebox;
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defer_free(argp, kfree, *acl);
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(*acl)->naces = nace;
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for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
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READ_BUF(16); len += 16;
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READ32(ace->type);
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READ32(ace->flag);
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READ32(ace->access_mask);
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READ32(dummy32);
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READ_BUF(dummy32);
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len += XDR_QUADLEN(dummy32) << 2;
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READMEM(buf, dummy32);
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ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
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status = nfs_ok;
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if (ace->whotype != NFS4_ACL_WHO_NAMED)
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;
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else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
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status = nfsd_map_name_to_gid(argp->rqstp,
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buf, dummy32, &ace->who_gid);
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else
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status = nfsd_map_name_to_uid(argp->rqstp,
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buf, dummy32, &ace->who_uid);
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if (status)
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return status;
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}
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} else
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*acl = NULL;
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if (bmval[1] & FATTR4_WORD1_MODE) {
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READ_BUF(4);
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len += 4;
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READ32(iattr->ia_mode);
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iattr->ia_mode &= (S_IFMT | S_IALLUGO);
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iattr->ia_valid |= ATTR_MODE;
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}
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if (bmval[1] & FATTR4_WORD1_OWNER) {
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READ_BUF(4);
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len += 4;
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READ32(dummy32);
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READ_BUF(dummy32);
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len += (XDR_QUADLEN(dummy32) << 2);
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READMEM(buf, dummy32);
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if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
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return status;
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iattr->ia_valid |= ATTR_UID;
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}
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if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
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READ_BUF(4);
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len += 4;
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READ32(dummy32);
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READ_BUF(dummy32);
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len += (XDR_QUADLEN(dummy32) << 2);
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READMEM(buf, dummy32);
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if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
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return status;
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iattr->ia_valid |= ATTR_GID;
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}
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if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
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READ_BUF(4);
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len += 4;
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READ32(dummy32);
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switch (dummy32) {
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case NFS4_SET_TO_CLIENT_TIME:
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/* We require the high 32 bits of 'seconds' to be 0, and we ignore
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all 32 bits of 'nseconds'. */
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READ_BUF(12);
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len += 12;
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READ64(iattr->ia_atime.tv_sec);
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READ32(iattr->ia_atime.tv_nsec);
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if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
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return nfserr_inval;
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iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
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break;
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case NFS4_SET_TO_SERVER_TIME:
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iattr->ia_valid |= ATTR_ATIME;
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break;
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default:
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goto xdr_error;
|
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}
|
|
}
|
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if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
|
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READ_BUF(4);
|
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len += 4;
|
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READ32(dummy32);
|
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switch (dummy32) {
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case NFS4_SET_TO_CLIENT_TIME:
|
|
/* We require the high 32 bits of 'seconds' to be 0, and we ignore
|
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all 32 bits of 'nseconds'. */
|
|
READ_BUF(12);
|
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len += 12;
|
|
READ64(iattr->ia_mtime.tv_sec);
|
|
READ32(iattr->ia_mtime.tv_nsec);
|
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if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
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|
return nfserr_inval;
|
|
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
|
|
break;
|
|
case NFS4_SET_TO_SERVER_TIME:
|
|
iattr->ia_valid |= ATTR_MTIME;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
}
|
|
|
|
label->len = 0;
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
|
|
READ_BUF(4);
|
|
len += 4;
|
|
READ32(dummy32); /* lfs: we don't use it */
|
|
READ_BUF(4);
|
|
len += 4;
|
|
READ32(dummy32); /* pi: we don't use it either */
|
|
READ_BUF(4);
|
|
len += 4;
|
|
READ32(dummy32);
|
|
READ_BUF(dummy32);
|
|
if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
|
|
return nfserr_badlabel;
|
|
len += (XDR_QUADLEN(dummy32) << 2);
|
|
READMEM(buf, dummy32);
|
|
label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
|
|
if (!label->data)
|
|
return nfserr_jukebox;
|
|
label->len = dummy32;
|
|
defer_free(argp, kfree, label->data);
|
|
memcpy(label->data, buf, dummy32);
|
|
}
|
|
#endif
|
|
|
|
if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
|
|
|| bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
|
|
|| bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
|
|
READ_BUF(expected_len - len);
|
|
else if (len != expected_len)
|
|
goto xdr_error;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(sizeof(stateid_t));
|
|
READ32(sid->si_generation);
|
|
COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(access->ac_req_access);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 dummy, uid, gid;
|
|
char *machine_name;
|
|
int i;
|
|
int nr_secflavs;
|
|
|
|
/* callback_sec_params4 */
|
|
READ_BUF(4);
|
|
READ32(nr_secflavs);
|
|
if (nr_secflavs)
|
|
cbs->flavor = (u32)(-1);
|
|
else
|
|
/* Is this legal? Be generous, take it to mean AUTH_NONE: */
|
|
cbs->flavor = 0;
|
|
for (i = 0; i < nr_secflavs; ++i) {
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
switch (dummy) {
|
|
case RPC_AUTH_NULL:
|
|
/* Nothing to read */
|
|
if (cbs->flavor == (u32)(-1))
|
|
cbs->flavor = RPC_AUTH_NULL;
|
|
break;
|
|
case RPC_AUTH_UNIX:
|
|
READ_BUF(8);
|
|
/* stamp */
|
|
READ32(dummy);
|
|
|
|
/* machine name */
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
SAVEMEM(machine_name, dummy);
|
|
|
|
/* uid, gid */
|
|
READ_BUF(8);
|
|
READ32(uid);
|
|
READ32(gid);
|
|
|
|
/* more gids */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy * 4);
|
|
if (cbs->flavor == (u32)(-1)) {
|
|
kuid_t kuid = make_kuid(&init_user_ns, uid);
|
|
kgid_t kgid = make_kgid(&init_user_ns, gid);
|
|
if (uid_valid(kuid) && gid_valid(kgid)) {
|
|
cbs->uid = kuid;
|
|
cbs->gid = kgid;
|
|
cbs->flavor = RPC_AUTH_UNIX;
|
|
} else {
|
|
dprintk("RPC_AUTH_UNIX with invalid"
|
|
"uid or gid ignoring!\n");
|
|
}
|
|
}
|
|
break;
|
|
case RPC_AUTH_GSS:
|
|
dprintk("RPC_AUTH_GSS callback secflavor "
|
|
"not supported!\n");
|
|
READ_BUF(8);
|
|
/* gcbp_service */
|
|
READ32(dummy);
|
|
/* gcbp_handle_from_server */
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
/* gcbp_handle_from_client */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
break;
|
|
default:
|
|
dprintk("Illegal callback secflavor\n");
|
|
return nfserr_inval;
|
|
}
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(bc->bc_cb_program);
|
|
nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
|
|
COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
READ32(bcts->dir);
|
|
/* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
|
|
* could help us figure out we should be using it. */
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(close->cl_seqid);
|
|
return nfsd4_decode_stateid(argp, &close->cl_stateid);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(12);
|
|
READ64(commit->co_offset);
|
|
READ32(commit->co_count);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(create->cr_type);
|
|
switch (create->cr_type) {
|
|
case NF4LNK:
|
|
READ_BUF(4);
|
|
READ32(create->cr_linklen);
|
|
READ_BUF(create->cr_linklen);
|
|
SAVEMEM(create->cr_linkname, create->cr_linklen);
|
|
break;
|
|
case NF4BLK:
|
|
case NF4CHR:
|
|
READ_BUF(8);
|
|
READ32(create->cr_specdata1);
|
|
READ32(create->cr_specdata2);
|
|
break;
|
|
case NF4SOCK:
|
|
case NF4FIFO:
|
|
case NF4DIR:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
READ_BUF(4);
|
|
READ32(create->cr_namelen);
|
|
READ_BUF(create->cr_namelen);
|
|
SAVEMEM(create->cr_name, create->cr_namelen);
|
|
if ((status = check_filename(create->cr_name, create->cr_namelen)))
|
|
return status;
|
|
|
|
status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
|
|
&create->cr_acl, &create->cr_label);
|
|
if (status)
|
|
goto out;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
|
|
{
|
|
return nfsd4_decode_stateid(argp, &dr->dr_stateid);
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
|
|
{
|
|
return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(link->li_namelen);
|
|
READ_BUF(link->li_namelen);
|
|
SAVEMEM(link->li_name, link->li_namelen);
|
|
if ((status = check_filename(link->li_name, link->li_namelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
/*
|
|
* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
|
|
*/
|
|
READ_BUF(28);
|
|
READ32(lock->lk_type);
|
|
if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
READ32(lock->lk_reclaim);
|
|
READ64(lock->lk_offset);
|
|
READ64(lock->lk_length);
|
|
READ32(lock->lk_is_new);
|
|
|
|
if (lock->lk_is_new) {
|
|
READ_BUF(4);
|
|
READ32(lock->lk_new_open_seqid);
|
|
status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(8 + sizeof(clientid_t));
|
|
READ32(lock->lk_new_lock_seqid);
|
|
COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
|
|
READ32(lock->lk_new_owner.len);
|
|
READ_BUF(lock->lk_new_owner.len);
|
|
READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
|
|
} else {
|
|
status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
READ32(lock->lk_old_lock_seqid);
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(32);
|
|
READ32(lockt->lt_type);
|
|
if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
READ64(lockt->lt_offset);
|
|
READ64(lockt->lt_length);
|
|
COPYMEM(&lockt->lt_clientid, 8);
|
|
READ32(lockt->lt_owner.len);
|
|
READ_BUF(lockt->lt_owner.len);
|
|
READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(8);
|
|
READ32(locku->lu_type);
|
|
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
|
|
goto xdr_error;
|
|
READ32(locku->lu_seqid);
|
|
status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(16);
|
|
READ64(locku->lu_offset);
|
|
READ64(locku->lu_length);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(lookup->lo_len);
|
|
READ_BUF(lookup->lo_len);
|
|
SAVEMEM(lookup->lo_name, lookup->lo_len);
|
|
if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
|
|
{
|
|
__be32 *p;
|
|
u32 w;
|
|
|
|
READ_BUF(4);
|
|
READ32(w);
|
|
*share_access = w & NFS4_SHARE_ACCESS_MASK;
|
|
*deleg_want = w & NFS4_SHARE_WANT_MASK;
|
|
if (deleg_when)
|
|
*deleg_when = w & NFS4_SHARE_WHEN_MASK;
|
|
|
|
switch (w & NFS4_SHARE_ACCESS_MASK) {
|
|
case NFS4_SHARE_ACCESS_READ:
|
|
case NFS4_SHARE_ACCESS_WRITE:
|
|
case NFS4_SHARE_ACCESS_BOTH:
|
|
break;
|
|
default:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
w &= ~NFS4_SHARE_ACCESS_MASK;
|
|
if (!w)
|
|
return nfs_ok;
|
|
if (!argp->minorversion)
|
|
return nfserr_bad_xdr;
|
|
switch (w & NFS4_SHARE_WANT_MASK) {
|
|
case NFS4_SHARE_WANT_NO_PREFERENCE:
|
|
case NFS4_SHARE_WANT_READ_DELEG:
|
|
case NFS4_SHARE_WANT_WRITE_DELEG:
|
|
case NFS4_SHARE_WANT_ANY_DELEG:
|
|
case NFS4_SHARE_WANT_NO_DELEG:
|
|
case NFS4_SHARE_WANT_CANCEL:
|
|
break;
|
|
default:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
w &= ~NFS4_SHARE_WANT_MASK;
|
|
if (!w)
|
|
return nfs_ok;
|
|
|
|
if (!deleg_when) /* open_downgrade */
|
|
return nfserr_inval;
|
|
switch (w) {
|
|
case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
|
|
case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
|
|
case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
|
|
NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
|
|
return nfs_ok;
|
|
}
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
|
|
{
|
|
__be32 *p;
|
|
|
|
READ_BUF(4);
|
|
READ32(*x);
|
|
/* Note: unlinke access bits, deny bits may be zero. */
|
|
if (*x & ~NFS4_SHARE_DENY_BOTH)
|
|
return nfserr_bad_xdr;
|
|
return nfs_ok;
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
|
|
{
|
|
__be32 *p;
|
|
|
|
READ_BUF(4);
|
|
READ32(o->len);
|
|
|
|
if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
|
|
return nfserr_bad_xdr;
|
|
|
|
READ_BUF(o->len);
|
|
SAVEMEM(o->data, o->len);
|
|
return nfs_ok;
|
|
xdr_error:
|
|
return nfserr_bad_xdr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 dummy;
|
|
|
|
memset(open->op_bmval, 0, sizeof(open->op_bmval));
|
|
open->op_iattr.ia_valid = 0;
|
|
open->op_openowner = NULL;
|
|
|
|
open->op_xdr_error = 0;
|
|
/* seqid, share_access, share_deny, clientid, ownerlen */
|
|
READ_BUF(4);
|
|
READ32(open->op_seqid);
|
|
/* decode, yet ignore deleg_when until supported */
|
|
status = nfsd4_decode_share_access(argp, &open->op_share_access,
|
|
&open->op_deleg_want, &dummy);
|
|
if (status)
|
|
goto xdr_error;
|
|
status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
|
|
if (status)
|
|
goto xdr_error;
|
|
READ_BUF(sizeof(clientid_t));
|
|
COPYMEM(&open->op_clientid, sizeof(clientid_t));
|
|
status = nfsd4_decode_opaque(argp, &open->op_owner);
|
|
if (status)
|
|
goto xdr_error;
|
|
READ_BUF(4);
|
|
READ32(open->op_create);
|
|
switch (open->op_create) {
|
|
case NFS4_OPEN_NOCREATE:
|
|
break;
|
|
case NFS4_OPEN_CREATE:
|
|
READ_BUF(4);
|
|
READ32(open->op_createmode);
|
|
switch (open->op_createmode) {
|
|
case NFS4_CREATE_UNCHECKED:
|
|
case NFS4_CREATE_GUARDED:
|
|
status = nfsd4_decode_fattr(argp, open->op_bmval,
|
|
&open->op_iattr, &open->op_acl, &open->op_label);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
case NFS4_CREATE_EXCLUSIVE:
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
|
|
break;
|
|
case NFS4_CREATE_EXCLUSIVE4_1:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
|
|
status = nfsd4_decode_fattr(argp, open->op_bmval,
|
|
&open->op_iattr, &open->op_acl, &open->op_label);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
/* open_claim */
|
|
READ_BUF(4);
|
|
READ32(open->op_claim_type);
|
|
switch (open->op_claim_type) {
|
|
case NFS4_OPEN_CLAIM_NULL:
|
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
|
|
READ_BUF(4);
|
|
READ32(open->op_fname.len);
|
|
READ_BUF(open->op_fname.len);
|
|
SAVEMEM(open->op_fname.data, open->op_fname.len);
|
|
if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
|
|
return status;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_PREVIOUS:
|
|
READ_BUF(4);
|
|
READ32(open->op_delegate_type);
|
|
break;
|
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
|
|
status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
READ32(open->op_fname.len);
|
|
READ_BUF(open->op_fname.len);
|
|
SAVEMEM(open->op_fname.data, open->op_fname.len);
|
|
if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
|
|
return status;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_FH:
|
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
/* void */
|
|
break;
|
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
|
|
if (argp->minorversion < 1)
|
|
goto xdr_error;
|
|
status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
|
|
if (status)
|
|
return status;
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
READ32(open_conf->oc_seqid);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(4);
|
|
READ32(open_down->od_seqid);
|
|
status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
|
|
&open_down->od_deleg_want, NULL);
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
|
|
if (status)
|
|
return status;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(putfh->pf_fhlen);
|
|
if (putfh->pf_fhlen > NFS4_FHSIZE)
|
|
goto xdr_error;
|
|
READ_BUF(putfh->pf_fhlen);
|
|
SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
if (argp->minorversion == 0)
|
|
return nfs_ok;
|
|
return nfserr_notsupp;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &read->rd_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(12);
|
|
READ64(read->rd_offset);
|
|
READ32(read->rd_length);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(24);
|
|
READ64(readdir->rd_cookie);
|
|
COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
|
|
READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
|
|
READ32(readdir->rd_maxcount);
|
|
if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
|
|
goto out;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(remove->rm_namelen);
|
|
READ_BUF(remove->rm_namelen);
|
|
SAVEMEM(remove->rm_name, remove->rm_namelen);
|
|
if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(rename->rn_snamelen);
|
|
READ_BUF(rename->rn_snamelen + 4);
|
|
SAVEMEM(rename->rn_sname, rename->rn_snamelen);
|
|
READ32(rename->rn_tnamelen);
|
|
READ_BUF(rename->rn_tnamelen);
|
|
SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
|
|
if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
|
|
return status;
|
|
if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
|
|
return status;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(sizeof(clientid_t));
|
|
COPYMEM(clientid, sizeof(clientid_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_secinfo *secinfo)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(secinfo->si_namelen);
|
|
READ_BUF(secinfo->si_namelen);
|
|
SAVEMEM(secinfo->si_name, secinfo->si_namelen);
|
|
status = check_filename(secinfo->si_name, secinfo->si_namelen);
|
|
if (status)
|
|
return status;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_secinfo_no_name *sin)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(sin->sin_style);
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
|
|
{
|
|
__be32 status;
|
|
|
|
status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
|
|
if (status)
|
|
return status;
|
|
return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
|
|
&setattr->sa_acl, &setattr->sa_label);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
|
|
|
|
status = nfsd4_decode_opaque(argp, &setclientid->se_name);
|
|
if (status)
|
|
return nfserr_bad_xdr;
|
|
READ_BUF(8);
|
|
READ32(setclientid->se_callback_prog);
|
|
READ32(setclientid->se_callback_netid_len);
|
|
|
|
READ_BUF(setclientid->se_callback_netid_len + 4);
|
|
SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
|
|
READ32(setclientid->se_callback_addr_len);
|
|
|
|
READ_BUF(setclientid->se_callback_addr_len + 4);
|
|
SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
|
|
READ32(setclientid->se_callback_ident);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(8 + NFS4_VERIFIER_SIZE);
|
|
COPYMEM(&scd_c->sc_clientid, 8);
|
|
COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
/* Also used for NVERIFY */
|
|
static __be32
|
|
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
|
|
goto out;
|
|
|
|
/* For convenience's sake, we compare raw xdr'd attributes in
|
|
* nfsd4_proc_verify */
|
|
|
|
READ_BUF(4);
|
|
READ32(verify->ve_attrlen);
|
|
READ_BUF(verify->ve_attrlen);
|
|
SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
|
|
{
|
|
int avail;
|
|
int len;
|
|
DECODE_HEAD;
|
|
|
|
status = nfsd4_decode_stateid(argp, &write->wr_stateid);
|
|
if (status)
|
|
return status;
|
|
READ_BUF(16);
|
|
READ64(write->wr_offset);
|
|
READ32(write->wr_stable_how);
|
|
if (write->wr_stable_how > 2)
|
|
goto xdr_error;
|
|
READ32(write->wr_buflen);
|
|
|
|
/* Sorry .. no magic macros for this.. *
|
|
* READ_BUF(write->wr_buflen);
|
|
* SAVEMEM(write->wr_buf, write->wr_buflen);
|
|
*/
|
|
avail = (char*)argp->end - (char*)argp->p;
|
|
if (avail + argp->pagelen < write->wr_buflen) {
|
|
dprintk("NFSD: xdr error (%s:%d)\n",
|
|
__FILE__, __LINE__);
|
|
goto xdr_error;
|
|
}
|
|
write->wr_head.iov_base = p;
|
|
write->wr_head.iov_len = avail;
|
|
WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
|
|
write->wr_pagelist = argp->pagelist;
|
|
|
|
len = XDR_QUADLEN(write->wr_buflen) << 2;
|
|
if (len >= avail) {
|
|
int pages;
|
|
|
|
len -= avail;
|
|
|
|
pages = len >> PAGE_SHIFT;
|
|
argp->pagelist += pages;
|
|
argp->pagelen -= pages * PAGE_SIZE;
|
|
len -= pages * PAGE_SIZE;
|
|
|
|
argp->p = (__be32 *)page_address(argp->pagelist[0]);
|
|
argp->pagelist++;
|
|
argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
|
|
}
|
|
argp->p += XDR_QUADLEN(len);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
if (argp->minorversion >= 1)
|
|
return nfserr_notsupp;
|
|
|
|
READ_BUF(12);
|
|
COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
|
|
READ32(rlockowner->rl_owner.len);
|
|
READ_BUF(rlockowner->rl_owner.len);
|
|
READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
|
|
|
|
if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
|
|
return nfserr_inval;
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_exchange_id *exid)
|
|
{
|
|
int dummy, tmp;
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_VERIFIER_SIZE);
|
|
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
|
|
|
|
status = nfsd4_decode_opaque(argp, &exid->clname);
|
|
if (status)
|
|
return nfserr_bad_xdr;
|
|
|
|
READ_BUF(4);
|
|
READ32(exid->flags);
|
|
|
|
/* Ignore state_protect4_a */
|
|
READ_BUF(4);
|
|
READ32(exid->spa_how);
|
|
switch (exid->spa_how) {
|
|
case SP4_NONE:
|
|
break;
|
|
case SP4_MACH_CRED:
|
|
/* spo_must_enforce */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
|
|
/* spo_must_allow */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
break;
|
|
case SP4_SSV:
|
|
/* ssp_ops */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy * 4);
|
|
p += dummy;
|
|
|
|
/* ssp_hash_algs<> */
|
|
READ_BUF(4);
|
|
READ32(tmp);
|
|
while (tmp--) {
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
}
|
|
|
|
/* ssp_encr_algs<> */
|
|
READ_BUF(4);
|
|
READ32(tmp);
|
|
while (tmp--) {
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
}
|
|
|
|
/* ssp_window and ssp_num_gss_handles */
|
|
READ_BUF(8);
|
|
READ32(dummy);
|
|
READ32(dummy);
|
|
break;
|
|
default:
|
|
goto xdr_error;
|
|
}
|
|
|
|
/* Ignore Implementation ID */
|
|
READ_BUF(4); /* nfs_impl_id4 array length */
|
|
READ32(dummy);
|
|
|
|
if (dummy > 1)
|
|
goto xdr_error;
|
|
|
|
if (dummy == 1) {
|
|
/* nii_domain */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
|
|
/* nii_name */
|
|
READ_BUF(4);
|
|
READ32(dummy);
|
|
READ_BUF(dummy);
|
|
p += XDR_QUADLEN(dummy);
|
|
|
|
/* nii_date */
|
|
READ_BUF(12);
|
|
p += 3;
|
|
}
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_create_session *sess)
|
|
{
|
|
DECODE_HEAD;
|
|
u32 dummy;
|
|
|
|
READ_BUF(16);
|
|
COPYMEM(&sess->clientid, 8);
|
|
READ32(sess->seqid);
|
|
READ32(sess->flags);
|
|
|
|
/* Fore channel attrs */
|
|
READ_BUF(28);
|
|
READ32(dummy); /* headerpadsz is always 0 */
|
|
READ32(sess->fore_channel.maxreq_sz);
|
|
READ32(sess->fore_channel.maxresp_sz);
|
|
READ32(sess->fore_channel.maxresp_cached);
|
|
READ32(sess->fore_channel.maxops);
|
|
READ32(sess->fore_channel.maxreqs);
|
|
READ32(sess->fore_channel.nr_rdma_attrs);
|
|
if (sess->fore_channel.nr_rdma_attrs == 1) {
|
|
READ_BUF(4);
|
|
READ32(sess->fore_channel.rdma_attrs);
|
|
} else if (sess->fore_channel.nr_rdma_attrs > 1) {
|
|
dprintk("Too many fore channel attr bitmaps!\n");
|
|
goto xdr_error;
|
|
}
|
|
|
|
/* Back channel attrs */
|
|
READ_BUF(28);
|
|
READ32(dummy); /* headerpadsz is always 0 */
|
|
READ32(sess->back_channel.maxreq_sz);
|
|
READ32(sess->back_channel.maxresp_sz);
|
|
READ32(sess->back_channel.maxresp_cached);
|
|
READ32(sess->back_channel.maxops);
|
|
READ32(sess->back_channel.maxreqs);
|
|
READ32(sess->back_channel.nr_rdma_attrs);
|
|
if (sess->back_channel.nr_rdma_attrs == 1) {
|
|
READ_BUF(4);
|
|
READ32(sess->back_channel.rdma_attrs);
|
|
} else if (sess->back_channel.nr_rdma_attrs > 1) {
|
|
dprintk("Too many back channel attr bitmaps!\n");
|
|
goto xdr_error;
|
|
}
|
|
|
|
READ_BUF(4);
|
|
READ32(sess->callback_prog);
|
|
nfsd4_decode_cb_sec(argp, &sess->cb_sec);
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_destroy_session *destroy_session)
|
|
{
|
|
DECODE_HEAD;
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN);
|
|
COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_free_stateid *free_stateid)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(sizeof(stateid_t));
|
|
READ32(free_stateid->fr_stateid.si_generation);
|
|
COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
|
|
struct nfsd4_sequence *seq)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
|
|
COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
READ32(seq->seqid);
|
|
READ32(seq->slotid);
|
|
READ32(seq->maxslots);
|
|
READ32(seq->cachethis);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
|
|
{
|
|
int i;
|
|
__be32 *p, status;
|
|
struct nfsd4_test_stateid_id *stateid;
|
|
|
|
READ_BUF(4);
|
|
test_stateid->ts_num_ids = ntohl(*p++);
|
|
|
|
INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
|
|
|
|
for (i = 0; i < test_stateid->ts_num_ids; i++) {
|
|
stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
|
|
if (!stateid) {
|
|
status = nfserrno(-ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
defer_free(argp, kfree, stateid);
|
|
INIT_LIST_HEAD(&stateid->ts_id_list);
|
|
list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
|
|
|
|
status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
status = 0;
|
|
out:
|
|
return status;
|
|
xdr_error:
|
|
dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
|
|
status = nfserr_bad_xdr;
|
|
goto out;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(8);
|
|
COPYMEM(&dc->clientid, 8);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
|
|
{
|
|
DECODE_HEAD;
|
|
|
|
READ_BUF(4);
|
|
READ32(rc->rca_one_fs);
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
return nfs_ok;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
|
|
{
|
|
return nfserr_notsupp;
|
|
}
|
|
|
|
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
|
|
|
|
static nfsd4_dec nfsd4_dec_ops[] = {
|
|
[OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
|
|
[OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
|
|
[OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
|
|
[OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
|
|
[OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
|
|
[OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
|
|
[OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
|
|
[OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
|
|
[OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
|
|
[OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
|
|
[OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
|
|
[OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
|
|
[OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
|
|
[OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
|
|
[OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
|
|
[OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
|
|
[OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
|
|
[OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_READ] = (nfsd4_dec)nfsd4_decode_read,
|
|
[OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
|
|
[OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
|
|
[OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
|
|
[OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
|
|
[OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
|
|
[OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
|
|
[OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
|
|
[OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
|
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
|
|
[OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
|
|
[OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
|
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
|
|
|
|
/* new operations for NFSv4.1 */
|
|
[OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
|
|
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
|
|
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
|
|
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
|
|
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
|
|
[OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
|
|
[OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
|
|
[OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
|
|
[OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
|
|
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
|
|
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
|
|
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
|
|
};
|
|
|
|
static inline bool
|
|
nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
|
|
{
|
|
if (op->opnum < FIRST_NFS4_OP)
|
|
return false;
|
|
else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
|
|
return false;
|
|
else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
|
|
return false;
|
|
else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Return a rough estimate of the maximum possible reply size. Note the
|
|
* estimate includes rpc headers so is meant to be passed to
|
|
* svc_reserve, not svc_reserve_auth.
|
|
*
|
|
* Also note the current compound encoding permits only one operation to
|
|
* use pages beyond the first one, so the maximum possible length is the
|
|
* maximum over these values, not the sum.
|
|
*/
|
|
static int nfsd4_max_reply(u32 opnum)
|
|
{
|
|
switch (opnum) {
|
|
case OP_READLINK:
|
|
case OP_READDIR:
|
|
/*
|
|
* Both of these ops take a single page for data and put
|
|
* the head and tail in another page:
|
|
*/
|
|
return 2 * PAGE_SIZE;
|
|
case OP_READ:
|
|
return INT_MAX;
|
|
default:
|
|
return PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
|
|
{
|
|
DECODE_HEAD;
|
|
struct nfsd4_op *op;
|
|
bool cachethis = false;
|
|
int max_reply = PAGE_SIZE;
|
|
int i;
|
|
|
|
READ_BUF(4);
|
|
READ32(argp->taglen);
|
|
READ_BUF(argp->taglen + 8);
|
|
SAVEMEM(argp->tag, argp->taglen);
|
|
READ32(argp->minorversion);
|
|
READ32(argp->opcnt);
|
|
|
|
if (argp->taglen > NFSD4_MAX_TAGLEN)
|
|
goto xdr_error;
|
|
if (argp->opcnt > 100)
|
|
goto xdr_error;
|
|
|
|
if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
|
|
argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
|
|
if (!argp->ops) {
|
|
argp->ops = argp->iops;
|
|
dprintk("nfsd: couldn't allocate room for COMPOUND\n");
|
|
goto xdr_error;
|
|
}
|
|
}
|
|
|
|
if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
|
|
argp->opcnt = 0;
|
|
|
|
for (i = 0; i < argp->opcnt; i++) {
|
|
op = &argp->ops[i];
|
|
op->replay = NULL;
|
|
|
|
READ_BUF(4);
|
|
READ32(op->opnum);
|
|
|
|
if (nfsd4_opnum_in_range(argp, op))
|
|
op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
|
|
else {
|
|
op->opnum = OP_ILLEGAL;
|
|
op->status = nfserr_op_illegal;
|
|
}
|
|
|
|
if (op->status) {
|
|
argp->opcnt = i+1;
|
|
break;
|
|
}
|
|
/*
|
|
* We'll try to cache the result in the DRC if any one
|
|
* op in the compound wants to be cached:
|
|
*/
|
|
cachethis |= nfsd4_cache_this_op(op);
|
|
|
|
max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
|
|
}
|
|
/* Sessions make the DRC unnecessary: */
|
|
if (argp->minorversion)
|
|
cachethis = false;
|
|
if (max_reply != INT_MAX)
|
|
svc_reserve(argp->rqstp, max_reply);
|
|
argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
|
|
|
|
DECODE_TAIL;
|
|
}
|
|
|
|
#define WRITE32(n) *p++ = htonl(n)
|
|
#define WRITE64(n) do { \
|
|
*p++ = htonl((u32)((n) >> 32)); \
|
|
*p++ = htonl((u32)(n)); \
|
|
} while (0)
|
|
#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
|
|
*(p + XDR_QUADLEN(nbytes) -1) = 0; \
|
|
memcpy(p, ptr, nbytes); \
|
|
p += XDR_QUADLEN(nbytes); \
|
|
}} while (0)
|
|
|
|
static void write32(__be32 **p, u32 n)
|
|
{
|
|
*(*p)++ = htonl(n);
|
|
}
|
|
|
|
static void write64(__be32 **p, u64 n)
|
|
{
|
|
write32(p, (n >> 32));
|
|
write32(p, (u32)n);
|
|
}
|
|
|
|
static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
|
|
{
|
|
if (IS_I_VERSION(inode)) {
|
|
write64(p, inode->i_version);
|
|
} else {
|
|
write32(p, stat->ctime.tv_sec);
|
|
write32(p, stat->ctime.tv_nsec);
|
|
}
|
|
}
|
|
|
|
static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
|
|
{
|
|
write32(p, c->atomic);
|
|
if (c->change_supported) {
|
|
write64(p, c->before_change);
|
|
write64(p, c->after_change);
|
|
} else {
|
|
write32(p, c->before_ctime_sec);
|
|
write32(p, c->before_ctime_nsec);
|
|
write32(p, c->after_ctime_sec);
|
|
write32(p, c->after_ctime_nsec);
|
|
}
|
|
}
|
|
|
|
#define RESERVE_SPACE(nbytes) do { \
|
|
p = resp->p; \
|
|
BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
|
|
} while (0)
|
|
#define ADJUST_ARGS() resp->p = p
|
|
|
|
/* Encode as an array of strings the string given with components
|
|
* separated @sep, escaped with esc_enter and esc_exit.
|
|
*/
|
|
static __be32 nfsd4_encode_components_esc(char sep, char *components,
|
|
__be32 **pp, int *buflen,
|
|
char esc_enter, char esc_exit)
|
|
{
|
|
__be32 *p = *pp;
|
|
__be32 *countp = p;
|
|
int strlen, count=0;
|
|
char *str, *end, *next;
|
|
|
|
dprintk("nfsd4_encode_components(%s)\n", components);
|
|
if ((*buflen -= 4) < 0)
|
|
return nfserr_resource;
|
|
WRITE32(0); /* We will fill this in with @count later */
|
|
end = str = components;
|
|
while (*end) {
|
|
bool found_esc = false;
|
|
|
|
/* try to parse as esc_start, ..., esc_end, sep */
|
|
if (*str == esc_enter) {
|
|
for (; *end && (*end != esc_exit); end++)
|
|
/* find esc_exit or end of string */;
|
|
next = end + 1;
|
|
if (*end && (!*next || *next == sep)) {
|
|
str++;
|
|
found_esc = true;
|
|
}
|
|
}
|
|
|
|
if (!found_esc)
|
|
for (; *end && (*end != sep); end++)
|
|
/* find sep or end of string */;
|
|
|
|
strlen = end - str;
|
|
if (strlen) {
|
|
if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
|
|
return nfserr_resource;
|
|
WRITE32(strlen);
|
|
WRITEMEM(str, strlen);
|
|
count++;
|
|
}
|
|
else
|
|
end++;
|
|
str = end;
|
|
}
|
|
*pp = p;
|
|
p = countp;
|
|
WRITE32(count);
|
|
return 0;
|
|
}
|
|
|
|
/* Encode as an array of strings the string given with components
|
|
* separated @sep.
|
|
*/
|
|
static __be32 nfsd4_encode_components(char sep, char *components,
|
|
__be32 **pp, int *buflen)
|
|
{
|
|
return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* encode a location element of a fs_locations structure
|
|
*/
|
|
static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
|
|
__be32 **pp, int *buflen)
|
|
{
|
|
__be32 status;
|
|
__be32 *p = *pp;
|
|
|
|
status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
|
|
'[', ']');
|
|
if (status)
|
|
return status;
|
|
status = nfsd4_encode_components('/', location->path, &p, buflen);
|
|
if (status)
|
|
return status;
|
|
*pp = p;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Encode a path in RFC3530 'pathname4' format
|
|
*/
|
|
static __be32 nfsd4_encode_path(const struct path *root,
|
|
const struct path *path, __be32 **pp, int *buflen)
|
|
{
|
|
struct path cur = *path;
|
|
__be32 *p = *pp;
|
|
struct dentry **components = NULL;
|
|
unsigned int ncomponents = 0;
|
|
__be32 err = nfserr_jukebox;
|
|
|
|
dprintk("nfsd4_encode_components(");
|
|
|
|
path_get(&cur);
|
|
/* First walk the path up to the nfsd root, and store the
|
|
* dentries/path components in an array.
|
|
*/
|
|
for (;;) {
|
|
if (cur.dentry == root->dentry && cur.mnt == root->mnt)
|
|
break;
|
|
if (cur.dentry == cur.mnt->mnt_root) {
|
|
if (follow_up(&cur))
|
|
continue;
|
|
goto out_free;
|
|
}
|
|
if ((ncomponents & 15) == 0) {
|
|
struct dentry **new;
|
|
new = krealloc(components,
|
|
sizeof(*new) * (ncomponents + 16),
|
|
GFP_KERNEL);
|
|
if (!new)
|
|
goto out_free;
|
|
components = new;
|
|
}
|
|
components[ncomponents++] = cur.dentry;
|
|
cur.dentry = dget_parent(cur.dentry);
|
|
}
|
|
|
|
*buflen -= 4;
|
|
if (*buflen < 0)
|
|
goto out_free;
|
|
WRITE32(ncomponents);
|
|
|
|
while (ncomponents) {
|
|
struct dentry *dentry = components[ncomponents - 1];
|
|
unsigned int len;
|
|
|
|
spin_lock(&dentry->d_lock);
|
|
len = dentry->d_name.len;
|
|
*buflen -= 4 + (XDR_QUADLEN(len) << 2);
|
|
if (*buflen < 0) {
|
|
spin_unlock(&dentry->d_lock);
|
|
goto out_free;
|
|
}
|
|
WRITE32(len);
|
|
WRITEMEM(dentry->d_name.name, len);
|
|
dprintk("/%s", dentry->d_name.name);
|
|
spin_unlock(&dentry->d_lock);
|
|
dput(dentry);
|
|
ncomponents--;
|
|
}
|
|
|
|
*pp = p;
|
|
err = 0;
|
|
out_free:
|
|
dprintk(")\n");
|
|
while (ncomponents)
|
|
dput(components[--ncomponents]);
|
|
kfree(components);
|
|
path_put(&cur);
|
|
return err;
|
|
}
|
|
|
|
static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
|
|
const struct path *path, __be32 **pp, int *buflen)
|
|
{
|
|
struct svc_export *exp_ps;
|
|
__be32 res;
|
|
|
|
exp_ps = rqst_find_fsidzero_export(rqstp);
|
|
if (IS_ERR(exp_ps))
|
|
return nfserrno(PTR_ERR(exp_ps));
|
|
res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
|
|
exp_put(exp_ps);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* encode a fs_locations structure
|
|
*/
|
|
static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
|
|
struct svc_export *exp,
|
|
__be32 **pp, int *buflen)
|
|
{
|
|
__be32 status;
|
|
int i;
|
|
__be32 *p = *pp;
|
|
struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
|
|
|
|
status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
|
|
if (status)
|
|
return status;
|
|
if ((*buflen -= 4) < 0)
|
|
return nfserr_resource;
|
|
WRITE32(fslocs->locations_count);
|
|
for (i=0; i<fslocs->locations_count; i++) {
|
|
status = nfsd4_encode_fs_location4(&fslocs->locations[i],
|
|
&p, buflen);
|
|
if (status)
|
|
return status;
|
|
}
|
|
*pp = p;
|
|
return 0;
|
|
}
|
|
|
|
static u32 nfs4_file_type(umode_t mode)
|
|
{
|
|
switch (mode & S_IFMT) {
|
|
case S_IFIFO: return NF4FIFO;
|
|
case S_IFCHR: return NF4CHR;
|
|
case S_IFDIR: return NF4DIR;
|
|
case S_IFBLK: return NF4BLK;
|
|
case S_IFLNK: return NF4LNK;
|
|
case S_IFREG: return NF4REG;
|
|
case S_IFSOCK: return NF4SOCK;
|
|
default: return NF4BAD;
|
|
};
|
|
}
|
|
|
|
static inline __be32
|
|
nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
|
|
__be32 **p, int *buflen)
|
|
{
|
|
if (ace->whotype != NFS4_ACL_WHO_NAMED)
|
|
return nfs4_acl_write_who(ace->whotype, p, buflen);
|
|
else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
|
|
return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen);
|
|
else
|
|
return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen);
|
|
}
|
|
|
|
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
|
|
FATTR4_WORD0_RDATTR_ERROR)
|
|
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
|
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
static inline __be32
|
|
nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
|
|
{
|
|
__be32 *p = *pp;
|
|
|
|
if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
|
|
return nfserr_resource;
|
|
|
|
/*
|
|
* For now we use a 0 here to indicate the null translation; in
|
|
* the future we may place a call to translation code here.
|
|
*/
|
|
if ((*buflen -= 8) < 0)
|
|
return nfserr_resource;
|
|
|
|
WRITE32(0); /* lfs */
|
|
WRITE32(0); /* pi */
|
|
p = xdr_encode_opaque(p, context, len);
|
|
*buflen -= (XDR_QUADLEN(len) << 2) + 4;
|
|
|
|
*pp = p;
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline __be32
|
|
nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
|
|
{ return 0; }
|
|
#endif
|
|
|
|
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
|
|
{
|
|
/* As per referral draft: */
|
|
if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
|
|
*bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
|
|
if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
|
|
*bmval0 & FATTR4_WORD0_FS_LOCATIONS)
|
|
*rdattr_err = NFSERR_MOVED;
|
|
else
|
|
return nfserr_moved;
|
|
}
|
|
*bmval0 &= WORD0_ABSENT_FS_ATTRS;
|
|
*bmval1 &= WORD1_ABSENT_FS_ATTRS;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
|
|
{
|
|
struct path path = exp->ex_path;
|
|
int err;
|
|
|
|
path_get(&path);
|
|
while (follow_up(&path)) {
|
|
if (path.dentry != path.mnt->mnt_root)
|
|
break;
|
|
}
|
|
err = vfs_getattr(&path, stat);
|
|
path_put(&path);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle
|
|
* ourselves.
|
|
*
|
|
* countp is the buffer size in _words_
|
|
*/
|
|
__be32
|
|
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
|
|
struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
|
|
struct svc_rqst *rqstp, int ignore_crossmnt)
|
|
{
|
|
u32 bmval0 = bmval[0];
|
|
u32 bmval1 = bmval[1];
|
|
u32 bmval2 = bmval[2];
|
|
struct kstat stat;
|
|
struct svc_fh *tempfh = NULL;
|
|
struct kstatfs statfs;
|
|
int buflen = count << 2;
|
|
__be32 *attrlenp;
|
|
u32 dummy;
|
|
u64 dummy64;
|
|
u32 rdattr_err = 0;
|
|
__be32 *p = *buffer;
|
|
__be32 status;
|
|
int err;
|
|
int aclsupport = 0;
|
|
struct nfs4_acl *acl = NULL;
|
|
void *context = NULL;
|
|
int contextlen;
|
|
bool contextsupport = false;
|
|
struct nfsd4_compoundres *resp = rqstp->rq_resp;
|
|
u32 minorversion = resp->cstate.minorversion;
|
|
struct path path = {
|
|
.mnt = exp->ex_path.mnt,
|
|
.dentry = dentry,
|
|
};
|
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
|
|
|
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
|
|
BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
|
|
BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
|
|
BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
|
|
|
|
if (exp->ex_fslocs.migrated) {
|
|
BUG_ON(bmval[2]);
|
|
status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
err = vfs_getattr(&path, &stat);
|
|
if (err)
|
|
goto out_nfserr;
|
|
if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
|
|
FATTR4_WORD0_MAXNAME)) ||
|
|
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
|
|
FATTR4_WORD1_SPACE_TOTAL))) {
|
|
err = vfs_statfs(&path, &statfs);
|
|
if (err)
|
|
goto out_nfserr;
|
|
}
|
|
if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
|
|
tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
|
|
status = nfserr_jukebox;
|
|
if (!tempfh)
|
|
goto out;
|
|
fh_init(tempfh, NFS4_FHSIZE);
|
|
status = fh_compose(tempfh, exp, dentry, NULL);
|
|
if (status)
|
|
goto out;
|
|
fhp = tempfh;
|
|
}
|
|
if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
|
|
| FATTR4_WORD0_SUPPORTED_ATTRS)) {
|
|
err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
|
|
aclsupport = (err == 0);
|
|
if (bmval0 & FATTR4_WORD0_ACL) {
|
|
if (err == -EOPNOTSUPP)
|
|
bmval0 &= ~FATTR4_WORD0_ACL;
|
|
else if (err == -EINVAL) {
|
|
status = nfserr_attrnotsupp;
|
|
goto out;
|
|
} else if (err != 0)
|
|
goto out_nfserr;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
|
|
bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
|
|
err = security_inode_getsecctx(dentry->d_inode,
|
|
&context, &contextlen);
|
|
contextsupport = (err == 0);
|
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
|
|
if (err == -EOPNOTSUPP)
|
|
bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
|
|
else if (err)
|
|
goto out_nfserr;
|
|
}
|
|
}
|
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
|
|
|
|
if (bmval2) {
|
|
if ((buflen -= 16) < 0)
|
|
goto out_resource;
|
|
WRITE32(3);
|
|
WRITE32(bmval0);
|
|
WRITE32(bmval1);
|
|
WRITE32(bmval2);
|
|
} else if (bmval1) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE32(2);
|
|
WRITE32(bmval0);
|
|
WRITE32(bmval1);
|
|
} else {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
WRITE32(bmval0);
|
|
}
|
|
attrlenp = p++; /* to be backfilled later */
|
|
|
|
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
|
|
u32 word0 = nfsd_suppattrs0(minorversion);
|
|
u32 word1 = nfsd_suppattrs1(minorversion);
|
|
u32 word2 = nfsd_suppattrs2(minorversion);
|
|
|
|
if (!aclsupport)
|
|
word0 &= ~FATTR4_WORD0_ACL;
|
|
if (!contextsupport)
|
|
word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
|
|
if (!word2) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE32(2);
|
|
WRITE32(word0);
|
|
WRITE32(word1);
|
|
} else {
|
|
if ((buflen -= 16) < 0)
|
|
goto out_resource;
|
|
WRITE32(3);
|
|
WRITE32(word0);
|
|
WRITE32(word1);
|
|
WRITE32(word2);
|
|
}
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_TYPE) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
dummy = nfs4_file_type(stat.mode);
|
|
if (dummy == NF4BAD) {
|
|
status = nfserr_serverfault;
|
|
goto out;
|
|
}
|
|
WRITE32(dummy);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
|
|
WRITE32(NFS4_FH_PERSISTENT);
|
|
else
|
|
WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CHANGE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
write_change(&p, &stat, dentry->d_inode);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_SIZE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64(stat.size);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FSID) {
|
|
if ((buflen -= 16) < 0)
|
|
goto out_resource;
|
|
if (exp->ex_fslocs.migrated) {
|
|
WRITE64(NFS4_REFERRAL_FSID_MAJOR);
|
|
WRITE64(NFS4_REFERRAL_FSID_MINOR);
|
|
} else switch(fsid_source(fhp)) {
|
|
case FSIDSOURCE_FSID:
|
|
WRITE64((u64)exp->ex_fsid);
|
|
WRITE64((u64)0);
|
|
break;
|
|
case FSIDSOURCE_DEV:
|
|
WRITE32(0);
|
|
WRITE32(MAJOR(stat.dev));
|
|
WRITE32(0);
|
|
WRITE32(MINOR(stat.dev));
|
|
break;
|
|
case FSIDSOURCE_UUID:
|
|
WRITEMEM(exp->ex_uuid, 16);
|
|
break;
|
|
}
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(nn->nfsd4_lease);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(rdattr_err);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_ACL) {
|
|
struct nfs4_ace *ace;
|
|
|
|
if (acl == NULL) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
|
|
WRITE32(0);
|
|
goto out_acl;
|
|
}
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(acl->naces);
|
|
|
|
for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
|
|
if ((buflen -= 4*3) < 0)
|
|
goto out_resource;
|
|
WRITE32(ace->type);
|
|
WRITE32(ace->flag);
|
|
WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
|
|
status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
}
|
|
out_acl:
|
|
if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(aclsupport ?
|
|
ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CANSETTIME) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(0);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
|
|
buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
|
|
if (buflen < 0)
|
|
goto out_resource;
|
|
WRITE32(fhp->fh_handle.fh_size);
|
|
WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILEID) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64(stat.ino);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64((u64) statfs.f_ffree);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_FREE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64((u64) statfs.f_ffree);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64((u64) statfs.f_files);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
|
|
status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXLINK) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(255);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXNAME) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(statfs.f_namelen);
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXREAD) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64((u64) svc_max_payload(rqstp));
|
|
}
|
|
if (bmval0 & FATTR4_WORD0_MAXWRITE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE64((u64) svc_max_payload(rqstp));
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_MODE) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(stat.mode & S_IALLUGO);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(1);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_NUMLINKS) {
|
|
if ((buflen -= 4) < 0)
|
|
goto out_resource;
|
|
WRITE32(stat.nlink);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_OWNER) {
|
|
status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
|
|
status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_RAWDEV) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
WRITE32((u32) MAJOR(stat.rdev));
|
|
WRITE32((u32) MINOR(stat.rdev));
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
|
|
WRITE64(dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
|
|
WRITE64(dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
|
|
WRITE64(dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_SPACE_USED) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
dummy64 = (u64)stat.blocks << 9;
|
|
WRITE64(dummy64);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE64((s64)stat.atime.tv_sec);
|
|
WRITE32(stat.atime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE32(0);
|
|
WRITE32(1);
|
|
WRITE32(0);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE64((s64)stat.ctime.tv_sec);
|
|
WRITE32(stat.ctime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
|
|
if ((buflen -= 12) < 0)
|
|
goto out_resource;
|
|
WRITE64((s64)stat.mtime.tv_sec);
|
|
WRITE32(stat.mtime.tv_nsec);
|
|
}
|
|
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
|
|
if ((buflen -= 8) < 0)
|
|
goto out_resource;
|
|
/*
|
|
* Get parent's attributes if not ignoring crossmount
|
|
* and this is the root of a cross-mounted filesystem.
|
|
*/
|
|
if (ignore_crossmnt == 0 &&
|
|
dentry == exp->ex_path.mnt->mnt_root)
|
|
get_parent_attributes(exp, &stat);
|
|
WRITE64(stat.ino);
|
|
}
|
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
|
|
status = nfsd4_encode_security_label(rqstp, context,
|
|
contextlen, &p, &buflen);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
|
|
WRITE32(3);
|
|
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
|
|
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
|
|
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
|
|
}
|
|
|
|
*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
|
|
*buffer = p;
|
|
status = nfs_ok;
|
|
|
|
out:
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
|
|
if (context)
|
|
security_release_secctx(context, contextlen);
|
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
|
|
kfree(acl);
|
|
if (tempfh)
|
|
fh_put(tempfh);
|
|
return status;
|
|
out_nfserr:
|
|
status = nfserrno(err);
|
|
goto out;
|
|
out_resource:
|
|
status = nfserr_resource;
|
|
goto out;
|
|
}
|
|
|
|
static inline int attributes_need_mount(u32 *bmval)
|
|
{
|
|
if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
|
|
return 1;
|
|
if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
|
|
const char *name, int namlen, __be32 **p, int buflen)
|
|
{
|
|
struct svc_export *exp = cd->rd_fhp->fh_export;
|
|
struct dentry *dentry;
|
|
__be32 nfserr;
|
|
int ignore_crossmnt = 0;
|
|
|
|
dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
|
|
if (IS_ERR(dentry))
|
|
return nfserrno(PTR_ERR(dentry));
|
|
if (!dentry->d_inode) {
|
|
/*
|
|
* nfsd_buffered_readdir drops the i_mutex between
|
|
* readdir and calling this callback, leaving a window
|
|
* where this directory entry could have gone away.
|
|
*/
|
|
dput(dentry);
|
|
return nfserr_noent;
|
|
}
|
|
|
|
exp_get(exp);
|
|
/*
|
|
* In the case of a mountpoint, the client may be asking for
|
|
* attributes that are only properties of the underlying filesystem
|
|
* as opposed to the cross-mounted file system. In such a case,
|
|
* we will not follow the cross mount and will fill the attribtutes
|
|
* directly from the mountpoint dentry.
|
|
*/
|
|
if (nfsd_mountpoint(dentry, exp)) {
|
|
int err;
|
|
|
|
if (!(exp->ex_flags & NFSEXP_V4ROOT)
|
|
&& !attributes_need_mount(cd->rd_bmval)) {
|
|
ignore_crossmnt = 1;
|
|
goto out_encode;
|
|
}
|
|
/*
|
|
* Why the heck aren't we just using nfsd_lookup??
|
|
* Different "."/".." handling? Something else?
|
|
* At least, add a comment here to explain....
|
|
*/
|
|
err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
|
|
if (err) {
|
|
nfserr = nfserrno(err);
|
|
goto out_put;
|
|
}
|
|
nfserr = check_nfsd_access(exp, cd->rd_rqstp);
|
|
if (nfserr)
|
|
goto out_put;
|
|
|
|
}
|
|
out_encode:
|
|
nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
|
|
cd->rd_rqstp, ignore_crossmnt);
|
|
out_put:
|
|
dput(dentry);
|
|
exp_put(exp);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32 *
|
|
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
|
|
{
|
|
if (buflen < 6)
|
|
return NULL;
|
|
*p++ = htonl(2);
|
|
*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
|
|
*p++ = htonl(0); /* bmval1 */
|
|
|
|
*p++ = htonl(4); /* attribute length */
|
|
*p++ = nfserr; /* no htonl */
|
|
return p;
|
|
}
|
|
|
|
static int
|
|
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct readdir_cd *ccd = ccdv;
|
|
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
|
|
int buflen;
|
|
__be32 *p = cd->buffer;
|
|
__be32 *cookiep;
|
|
__be32 nfserr = nfserr_toosmall;
|
|
|
|
/* In nfsv4, "." and ".." never make it onto the wire.. */
|
|
if (name && isdotent(name, namlen)) {
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
}
|
|
|
|
if (cd->offset)
|
|
xdr_encode_hyper(cd->offset, (u64) offset);
|
|
|
|
buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
|
|
if (buflen < 0)
|
|
goto fail;
|
|
|
|
*p++ = xdr_one; /* mark entry present */
|
|
cookiep = p;
|
|
p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
|
|
p = xdr_encode_array(p, name, namlen); /* name length & name */
|
|
|
|
nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
|
|
switch (nfserr) {
|
|
case nfs_ok:
|
|
break;
|
|
case nfserr_resource:
|
|
nfserr = nfserr_toosmall;
|
|
goto fail;
|
|
case nfserr_noent:
|
|
goto skip_entry;
|
|
default:
|
|
/*
|
|
* If the client requested the RDATTR_ERROR attribute,
|
|
* we stuff the error code into this attribute
|
|
* and continue. If this attribute was not requested,
|
|
* then in accordance with the spec, we fail the
|
|
* entire READDIR operation(!)
|
|
*/
|
|
if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
|
|
goto fail;
|
|
p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
|
|
if (p == NULL) {
|
|
nfserr = nfserr_toosmall;
|
|
goto fail;
|
|
}
|
|
}
|
|
cd->buflen -= (p - cd->buffer);
|
|
cd->buffer = p;
|
|
cd->offset = cookiep;
|
|
skip_entry:
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
fail:
|
|
cd->common.err = nfserr;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void
|
|
nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
|
|
{
|
|
__be32 *p;
|
|
|
|
RESERVE_SPACE(sizeof(stateid_t));
|
|
WRITE32(sid->si_generation);
|
|
WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
|
|
ADJUST_ARGS();
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(8);
|
|
WRITE32(access->ac_supported);
|
|
WRITE32(access->ac_resp_access);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
|
|
WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
WRITE32(bcts->dir);
|
|
/* Sorry, we do not yet support RDMA over 4.1: */
|
|
WRITE32(0);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
|
|
{
|
|
if (!nfserr)
|
|
nfsd4_encode_stateid(resp, &close->cl_stateid);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(NFS4_VERIFIER_SIZE);
|
|
WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(32);
|
|
write_cinfo(&p, &create->cr_cinfo);
|
|
WRITE32(2);
|
|
WRITE32(create->cr_bmval[0]);
|
|
WRITE32(create->cr_bmval[1]);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
|
|
{
|
|
struct svc_fh *fhp = getattr->ga_fhp;
|
|
int buflen;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
|
|
nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
|
|
&resp->p, buflen, getattr->ga_bmval,
|
|
resp->rqstp, 0);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
|
|
{
|
|
struct svc_fh *fhp = *fhpp;
|
|
unsigned int len;
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
len = fhp->fh_handle.fh_size;
|
|
RESERVE_SPACE(len + 4);
|
|
WRITE32(len);
|
|
WRITEMEM(&fhp->fh_handle.fh_base, len);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
/*
|
|
* Including all fields other than the name, a LOCK4denied structure requires
|
|
* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
|
|
*/
|
|
static void
|
|
nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
|
|
{
|
|
struct xdr_netobj *conf = &ld->ld_owner;
|
|
__be32 *p;
|
|
|
|
RESERVE_SPACE(32 + XDR_LEN(conf->len));
|
|
WRITE64(ld->ld_start);
|
|
WRITE64(ld->ld_length);
|
|
WRITE32(ld->ld_type);
|
|
if (conf->len) {
|
|
WRITEMEM(&ld->ld_clientid, 8);
|
|
WRITE32(conf->len);
|
|
WRITEMEM(conf->data, conf->len);
|
|
kfree(conf->data);
|
|
} else { /* non - nfsv4 lock in conflict, no clientid nor owner */
|
|
WRITE64((u64)0); /* clientid */
|
|
WRITE32(0); /* length of owner name */
|
|
}
|
|
ADJUST_ARGS();
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
|
|
{
|
|
if (!nfserr)
|
|
nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
|
|
else if (nfserr == nfserr_denied)
|
|
nfsd4_encode_lock_denied(resp, &lock->lk_denied);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
|
|
{
|
|
if (nfserr == nfserr_denied)
|
|
nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
|
|
{
|
|
if (!nfserr)
|
|
nfsd4_encode_stateid(resp, &locku->lu_stateid);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(20);
|
|
write_cinfo(&p, &link->li_cinfo);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
|
|
static __be32
|
|
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
goto out;
|
|
|
|
nfsd4_encode_stateid(resp, &open->op_stateid);
|
|
RESERVE_SPACE(40);
|
|
write_cinfo(&p, &open->op_cinfo);
|
|
WRITE32(open->op_rflags);
|
|
WRITE32(2);
|
|
WRITE32(open->op_bmval[0]);
|
|
WRITE32(open->op_bmval[1]);
|
|
WRITE32(open->op_delegate_type);
|
|
ADJUST_ARGS();
|
|
|
|
switch (open->op_delegate_type) {
|
|
case NFS4_OPEN_DELEGATE_NONE:
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_READ:
|
|
nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
|
|
RESERVE_SPACE(20);
|
|
WRITE32(open->op_recall);
|
|
|
|
/*
|
|
* TODO: ACE's in delegations
|
|
*/
|
|
WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
WRITE32(0); /* XXX: is NULL principal ok? */
|
|
ADJUST_ARGS();
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_WRITE:
|
|
nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
|
|
RESERVE_SPACE(32);
|
|
WRITE32(0);
|
|
|
|
/*
|
|
* TODO: space_limit's in delegations
|
|
*/
|
|
WRITE32(NFS4_LIMIT_SIZE);
|
|
WRITE32(~(u32)0);
|
|
WRITE32(~(u32)0);
|
|
|
|
/*
|
|
* TODO: ACE's in delegations
|
|
*/
|
|
WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
WRITE32(0); /* XXX: is NULL principal ok? */
|
|
ADJUST_ARGS();
|
|
break;
|
|
case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
|
|
switch (open->op_why_no_deleg) {
|
|
case WND4_CONTENTION:
|
|
case WND4_RESOURCE:
|
|
RESERVE_SPACE(8);
|
|
WRITE32(open->op_why_no_deleg);
|
|
WRITE32(0); /* deleg signaling not supported yet */
|
|
break;
|
|
default:
|
|
RESERVE_SPACE(4);
|
|
WRITE32(open->op_why_no_deleg);
|
|
}
|
|
ADJUST_ARGS();
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
/* XXX save filehandle here */
|
|
out:
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
|
|
{
|
|
if (!nfserr)
|
|
nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
|
|
{
|
|
if (!nfserr)
|
|
nfsd4_encode_stateid(resp, &od->od_stateid);
|
|
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_read *read)
|
|
{
|
|
u32 eof;
|
|
int v;
|
|
struct page *page;
|
|
unsigned long maxcount;
|
|
long len;
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
if (resp->xbuf->page_len)
|
|
return nfserr_resource;
|
|
|
|
RESERVE_SPACE(8); /* eof flag and byte count */
|
|
|
|
maxcount = svc_max_payload(resp->rqstp);
|
|
if (maxcount > read->rd_length)
|
|
maxcount = read->rd_length;
|
|
|
|
len = maxcount;
|
|
v = 0;
|
|
while (len > 0) {
|
|
page = *(resp->rqstp->rq_next_page);
|
|
if (!page) { /* ran out of pages */
|
|
maxcount -= len;
|
|
break;
|
|
}
|
|
resp->rqstp->rq_vec[v].iov_base = page_address(page);
|
|
resp->rqstp->rq_vec[v].iov_len =
|
|
len < PAGE_SIZE ? len : PAGE_SIZE;
|
|
resp->rqstp->rq_next_page++;
|
|
v++;
|
|
len -= PAGE_SIZE;
|
|
}
|
|
read->rd_vlen = v;
|
|
|
|
nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
|
|
read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
|
|
&maxcount);
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
eof = (read->rd_offset + maxcount >=
|
|
read->rd_fhp->fh_dentry->d_inode->i_size);
|
|
|
|
WRITE32(eof);
|
|
WRITE32(maxcount);
|
|
ADJUST_ARGS();
|
|
resp->xbuf->head[0].iov_len = (char*)p
|
|
- (char*)resp->xbuf->head[0].iov_base;
|
|
resp->xbuf->page_len = maxcount;
|
|
|
|
/* Use rest of head for padding and remaining ops: */
|
|
resp->xbuf->tail[0].iov_base = p;
|
|
resp->xbuf->tail[0].iov_len = 0;
|
|
if (maxcount&3) {
|
|
RESERVE_SPACE(4);
|
|
WRITE32(0);
|
|
resp->xbuf->tail[0].iov_base += maxcount&3;
|
|
resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
|
|
ADJUST_ARGS();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
|
|
{
|
|
int maxcount;
|
|
char *page;
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
if (resp->xbuf->page_len)
|
|
return nfserr_resource;
|
|
if (!*resp->rqstp->rq_next_page)
|
|
return nfserr_resource;
|
|
|
|
page = page_address(*(resp->rqstp->rq_next_page++));
|
|
|
|
maxcount = PAGE_SIZE;
|
|
RESERVE_SPACE(4);
|
|
|
|
/*
|
|
* XXX: By default, the ->readlink() VFS op will truncate symlinks
|
|
* if they would overflow the buffer. Is this kosher in NFSv4? If
|
|
* not, one easy fix is: if ->readlink() precisely fills the buffer,
|
|
* assume that truncation occurred, and return NFS4ERR_RESOURCE.
|
|
*/
|
|
nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
|
|
if (nfserr == nfserr_isdir)
|
|
return nfserr_inval;
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
WRITE32(maxcount);
|
|
ADJUST_ARGS();
|
|
resp->xbuf->head[0].iov_len = (char*)p
|
|
- (char*)resp->xbuf->head[0].iov_base;
|
|
resp->xbuf->page_len = maxcount;
|
|
|
|
/* Use rest of head for padding and remaining ops: */
|
|
resp->xbuf->tail[0].iov_base = p;
|
|
resp->xbuf->tail[0].iov_len = 0;
|
|
if (maxcount&3) {
|
|
RESERVE_SPACE(4);
|
|
WRITE32(0);
|
|
resp->xbuf->tail[0].iov_base += maxcount&3;
|
|
resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
|
|
ADJUST_ARGS();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
|
|
{
|
|
int maxcount;
|
|
loff_t offset;
|
|
__be32 *page, *savep, *tailbase;
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
if (resp->xbuf->page_len)
|
|
return nfserr_resource;
|
|
if (!*resp->rqstp->rq_next_page)
|
|
return nfserr_resource;
|
|
|
|
RESERVE_SPACE(NFS4_VERIFIER_SIZE);
|
|
savep = p;
|
|
|
|
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
ADJUST_ARGS();
|
|
resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
|
|
tailbase = p;
|
|
|
|
maxcount = PAGE_SIZE;
|
|
if (maxcount > readdir->rd_maxcount)
|
|
maxcount = readdir->rd_maxcount;
|
|
|
|
/*
|
|
* Convert from bytes to words, account for the two words already
|
|
* written, make sure to leave two words at the end for the next
|
|
* pointer and eof field.
|
|
*/
|
|
maxcount = (maxcount >> 2) - 4;
|
|
if (maxcount < 0) {
|
|
nfserr = nfserr_toosmall;
|
|
goto err_no_verf;
|
|
}
|
|
|
|
page = page_address(*(resp->rqstp->rq_next_page++));
|
|
readdir->common.err = 0;
|
|
readdir->buflen = maxcount;
|
|
readdir->buffer = page;
|
|
readdir->offset = NULL;
|
|
|
|
offset = readdir->rd_cookie;
|
|
nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
|
|
&offset,
|
|
&readdir->common, nfsd4_encode_dirent);
|
|
if (nfserr == nfs_ok &&
|
|
readdir->common.err == nfserr_toosmall &&
|
|
readdir->buffer == page)
|
|
nfserr = nfserr_toosmall;
|
|
if (nfserr)
|
|
goto err_no_verf;
|
|
|
|
if (readdir->offset)
|
|
xdr_encode_hyper(readdir->offset, offset);
|
|
|
|
p = readdir->buffer;
|
|
*p++ = 0; /* no more entries */
|
|
*p++ = htonl(readdir->common.err == nfserr_eof);
|
|
resp->xbuf->page_len = ((char*)p) -
|
|
(char*)page_address(*(resp->rqstp->rq_next_page-1));
|
|
|
|
/* Use rest of head for padding and remaining ops: */
|
|
resp->xbuf->tail[0].iov_base = tailbase;
|
|
resp->xbuf->tail[0].iov_len = 0;
|
|
resp->p = resp->xbuf->tail[0].iov_base;
|
|
resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
|
|
|
|
return 0;
|
|
err_no_verf:
|
|
p = savep;
|
|
ADJUST_ARGS();
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(20);
|
|
write_cinfo(&p, &remove->rm_cinfo);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(40);
|
|
write_cinfo(&p, &rename->rn_sinfo);
|
|
write_cinfo(&p, &rename->rn_tinfo);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
|
|
__be32 nfserr, struct svc_export *exp)
|
|
{
|
|
u32 i, nflavs, supported;
|
|
struct exp_flavor_info *flavs;
|
|
struct exp_flavor_info def_flavs[2];
|
|
__be32 *p, *flavorsp;
|
|
static bool report = true;
|
|
|
|
if (nfserr)
|
|
goto out;
|
|
if (exp->ex_nflavors) {
|
|
flavs = exp->ex_flavors;
|
|
nflavs = exp->ex_nflavors;
|
|
} else { /* Handling of some defaults in absence of real secinfo: */
|
|
flavs = def_flavs;
|
|
if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
|
|
nflavs = 2;
|
|
flavs[0].pseudoflavor = RPC_AUTH_UNIX;
|
|
flavs[1].pseudoflavor = RPC_AUTH_NULL;
|
|
} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
|
|
nflavs = 1;
|
|
flavs[0].pseudoflavor
|
|
= svcauth_gss_flavor(exp->ex_client);
|
|
} else {
|
|
nflavs = 1;
|
|
flavs[0].pseudoflavor
|
|
= exp->ex_client->flavour->flavour;
|
|
}
|
|
}
|
|
|
|
supported = 0;
|
|
RESERVE_SPACE(4);
|
|
flavorsp = p++; /* to be backfilled later */
|
|
ADJUST_ARGS();
|
|
|
|
for (i = 0; i < nflavs; i++) {
|
|
rpc_authflavor_t pf = flavs[i].pseudoflavor;
|
|
struct rpcsec_gss_info info;
|
|
|
|
if (rpcauth_get_gssinfo(pf, &info) == 0) {
|
|
supported++;
|
|
RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
|
|
WRITE32(RPC_AUTH_GSS);
|
|
WRITE32(info.oid.len);
|
|
WRITEMEM(info.oid.data, info.oid.len);
|
|
WRITE32(info.qop);
|
|
WRITE32(info.service);
|
|
ADJUST_ARGS();
|
|
} else if (pf < RPC_AUTH_MAXFLAVOR) {
|
|
supported++;
|
|
RESERVE_SPACE(4);
|
|
WRITE32(pf);
|
|
ADJUST_ARGS();
|
|
} else {
|
|
if (report)
|
|
pr_warn("NFS: SECINFO: security flavor %u "
|
|
"is not supported\n", pf);
|
|
}
|
|
}
|
|
|
|
if (nflavs != supported)
|
|
report = false;
|
|
*flavorsp = htonl(supported);
|
|
|
|
out:
|
|
if (exp)
|
|
exp_put(exp);
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_secinfo *secinfo)
|
|
{
|
|
return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_secinfo_no_name *secinfo)
|
|
{
|
|
return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
|
|
}
|
|
|
|
/*
|
|
* The SETATTR encode routine is special -- it always encodes a bitmap,
|
|
* regardless of the error status.
|
|
*/
|
|
static __be32
|
|
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
|
|
{
|
|
__be32 *p;
|
|
|
|
RESERVE_SPACE(16);
|
|
if (nfserr) {
|
|
WRITE32(3);
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
}
|
|
else {
|
|
WRITE32(3);
|
|
WRITE32(setattr->sa_bmval[0]);
|
|
WRITE32(setattr->sa_bmval[1]);
|
|
WRITE32(setattr->sa_bmval[2]);
|
|
}
|
|
ADJUST_ARGS();
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
|
|
WRITEMEM(&scd->se_clientid, 8);
|
|
WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
|
|
ADJUST_ARGS();
|
|
}
|
|
else if (nfserr == nfserr_clid_inuse) {
|
|
RESERVE_SPACE(8);
|
|
WRITE32(0);
|
|
WRITE32(0);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!nfserr) {
|
|
RESERVE_SPACE(16);
|
|
WRITE32(write->wr_bytes_written);
|
|
WRITE32(write->wr_how_written);
|
|
WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
|
|
ADJUST_ARGS();
|
|
}
|
|
return nfserr;
|
|
}
|
|
|
|
static const u32 nfs4_minimal_spo_must_enforce[2] = {
|
|
[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
|
|
1 << (OP_EXCHANGE_ID - 32) |
|
|
1 << (OP_CREATE_SESSION - 32) |
|
|
1 << (OP_DESTROY_SESSION - 32) |
|
|
1 << (OP_DESTROY_CLIENTID - 32)
|
|
};
|
|
|
|
static __be32
|
|
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_exchange_id *exid)
|
|
{
|
|
__be32 *p;
|
|
char *major_id;
|
|
char *server_scope;
|
|
int major_id_sz;
|
|
int server_scope_sz;
|
|
uint64_t minor_id = 0;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
major_id = utsname()->nodename;
|
|
major_id_sz = strlen(major_id);
|
|
server_scope = utsname()->nodename;
|
|
server_scope_sz = strlen(server_scope);
|
|
|
|
RESERVE_SPACE(
|
|
8 /* eir_clientid */ +
|
|
4 /* eir_sequenceid */ +
|
|
4 /* eir_flags */ +
|
|
4 /* spr_how */);
|
|
|
|
WRITEMEM(&exid->clientid, 8);
|
|
WRITE32(exid->seqid);
|
|
WRITE32(exid->flags);
|
|
|
|
WRITE32(exid->spa_how);
|
|
ADJUST_ARGS();
|
|
|
|
switch (exid->spa_how) {
|
|
case SP4_NONE:
|
|
break;
|
|
case SP4_MACH_CRED:
|
|
/* spo_must_enforce, spo_must_allow */
|
|
RESERVE_SPACE(16);
|
|
|
|
/* spo_must_enforce bitmap: */
|
|
WRITE32(2);
|
|
WRITE32(nfs4_minimal_spo_must_enforce[0]);
|
|
WRITE32(nfs4_minimal_spo_must_enforce[1]);
|
|
/* empty spo_must_allow bitmap: */
|
|
WRITE32(0);
|
|
|
|
ADJUST_ARGS();
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
RESERVE_SPACE(
|
|
8 /* so_minor_id */ +
|
|
4 /* so_major_id.len */ +
|
|
(XDR_QUADLEN(major_id_sz) * 4) +
|
|
4 /* eir_server_scope.len */ +
|
|
(XDR_QUADLEN(server_scope_sz) * 4) +
|
|
4 /* eir_server_impl_id.count (0) */);
|
|
|
|
/* The server_owner struct */
|
|
WRITE64(minor_id); /* Minor id */
|
|
/* major id */
|
|
WRITE32(major_id_sz);
|
|
WRITEMEM(major_id, major_id_sz);
|
|
|
|
/* Server scope */
|
|
WRITE32(server_scope_sz);
|
|
WRITEMEM(server_scope, server_scope_sz);
|
|
|
|
/* Implementation id */
|
|
WRITE32(0); /* zero length nfs_impl_id4 array */
|
|
ADJUST_ARGS();
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_create_session *sess)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
RESERVE_SPACE(24);
|
|
WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
WRITE32(sess->seqid);
|
|
WRITE32(sess->flags);
|
|
ADJUST_ARGS();
|
|
|
|
RESERVE_SPACE(28);
|
|
WRITE32(0); /* headerpadsz */
|
|
WRITE32(sess->fore_channel.maxreq_sz);
|
|
WRITE32(sess->fore_channel.maxresp_sz);
|
|
WRITE32(sess->fore_channel.maxresp_cached);
|
|
WRITE32(sess->fore_channel.maxops);
|
|
WRITE32(sess->fore_channel.maxreqs);
|
|
WRITE32(sess->fore_channel.nr_rdma_attrs);
|
|
ADJUST_ARGS();
|
|
|
|
if (sess->fore_channel.nr_rdma_attrs) {
|
|
RESERVE_SPACE(4);
|
|
WRITE32(sess->fore_channel.rdma_attrs);
|
|
ADJUST_ARGS();
|
|
}
|
|
|
|
RESERVE_SPACE(28);
|
|
WRITE32(0); /* headerpadsz */
|
|
WRITE32(sess->back_channel.maxreq_sz);
|
|
WRITE32(sess->back_channel.maxresp_sz);
|
|
WRITE32(sess->back_channel.maxresp_cached);
|
|
WRITE32(sess->back_channel.maxops);
|
|
WRITE32(sess->back_channel.maxreqs);
|
|
WRITE32(sess->back_channel.nr_rdma_attrs);
|
|
ADJUST_ARGS();
|
|
|
|
if (sess->back_channel.nr_rdma_attrs) {
|
|
RESERVE_SPACE(4);
|
|
WRITE32(sess->back_channel.rdma_attrs);
|
|
ADJUST_ARGS();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_sequence *seq)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (nfserr)
|
|
return nfserr;
|
|
|
|
RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
|
|
WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
|
|
WRITE32(seq->seqid);
|
|
WRITE32(seq->slotid);
|
|
/* Note slotid's are numbered from zero: */
|
|
WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
|
|
WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
|
|
WRITE32(seq->status_flags);
|
|
|
|
ADJUST_ARGS();
|
|
resp->cstate.datap = p; /* DRC cache data pointer */
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
|
|
struct nfsd4_test_stateid *test_stateid)
|
|
{
|
|
struct nfsd4_test_stateid_id *stateid, *next;
|
|
__be32 *p;
|
|
|
|
RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
|
|
*p++ = htonl(test_stateid->ts_num_ids);
|
|
|
|
list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
|
|
*p++ = stateid->ts_id_status;
|
|
}
|
|
|
|
ADJUST_ARGS();
|
|
return nfserr;
|
|
}
|
|
|
|
static __be32
|
|
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
|
|
{
|
|
return nfserr;
|
|
}
|
|
|
|
typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
|
|
|
|
/*
|
|
* Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
|
|
* since we don't need to filter out obsolete ops as this is
|
|
* done in the decoding phase.
|
|
*/
|
|
static nfsd4_enc nfsd4_enc_ops[] = {
|
|
[OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
|
|
[OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
|
|
[OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
|
|
[OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
|
|
[OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
|
|
[OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
|
|
[OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
|
|
[OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
|
|
[OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
|
|
[OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
|
|
[OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
|
|
[OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
|
|
[OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
|
|
[OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_READ] = (nfsd4_enc)nfsd4_encode_read,
|
|
[OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
|
|
[OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
|
|
[OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
|
|
[OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
|
|
[OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
|
|
[OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
|
|
[OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
|
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
|
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
|
|
|
|
/* NFSv4.1 operations */
|
|
[OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
|
|
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
|
|
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
|
|
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
|
|
[OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
|
|
[OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
|
|
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
|
|
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
|
|
};
|
|
|
|
/*
|
|
* Calculate the total amount of memory that the compound response has taken
|
|
* after encoding the current operation with pad.
|
|
*
|
|
* pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
|
|
* which was specified at nfsd4_operation, else pad is zero.
|
|
*
|
|
* Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
|
|
*
|
|
* Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
|
|
* will be at least a page and will therefore hold the xdr_buf head.
|
|
*/
|
|
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
|
|
{
|
|
struct xdr_buf *xb = &resp->rqstp->rq_res;
|
|
struct nfsd4_session *session = NULL;
|
|
struct nfsd4_slot *slot = resp->cstate.slot;
|
|
u32 length, tlen = 0;
|
|
|
|
if (!nfsd4_has_session(&resp->cstate))
|
|
return 0;
|
|
|
|
session = resp->cstate.session;
|
|
if (session == NULL)
|
|
return 0;
|
|
|
|
if (xb->page_len == 0) {
|
|
length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
|
|
} else {
|
|
if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
|
|
tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
|
|
|
|
length = xb->head[0].iov_len + xb->page_len + tlen + pad;
|
|
}
|
|
dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
|
|
length, xb->page_len, tlen, pad);
|
|
|
|
if (length > session->se_fchannel.maxresp_sz)
|
|
return nfserr_rep_too_big;
|
|
|
|
if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
|
|
length > session->se_fchannel.maxresp_cached)
|
|
return nfserr_rep_too_big_to_cache;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
|
|
{
|
|
struct nfs4_stateowner *so = resp->cstate.replay_owner;
|
|
__be32 *statp;
|
|
__be32 *p;
|
|
|
|
RESERVE_SPACE(8);
|
|
WRITE32(op->opnum);
|
|
statp = p++; /* to be backfilled at the end */
|
|
ADJUST_ARGS();
|
|
|
|
if (op->opnum == OP_ILLEGAL)
|
|
goto status;
|
|
BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
|
|
!nfsd4_enc_ops[op->opnum]);
|
|
op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
|
|
/* nfsd4_check_drc_limit guarantees enough room for error status */
|
|
if (!op->status)
|
|
op->status = nfsd4_check_resp_size(resp, 0);
|
|
if (so) {
|
|
so->so_replay.rp_status = op->status;
|
|
so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
|
|
memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
|
|
}
|
|
status:
|
|
/*
|
|
* Note: We write the status directly, instead of using WRITE32(),
|
|
* since it is already in network byte order.
|
|
*/
|
|
*statp = op->status;
|
|
}
|
|
|
|
/*
|
|
* Encode the reply stored in the stateowner reply cache
|
|
*
|
|
* XDR note: do not encode rp->rp_buflen: the buffer contains the
|
|
* previously sent already encoded operation.
|
|
*
|
|
* called with nfs4_lock_state() held
|
|
*/
|
|
void
|
|
nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
|
|
{
|
|
__be32 *p;
|
|
struct nfs4_replay *rp = op->replay;
|
|
|
|
BUG_ON(!rp);
|
|
|
|
RESERVE_SPACE(8);
|
|
WRITE32(op->opnum);
|
|
*p++ = rp->rp_status; /* already xdr'ed */
|
|
ADJUST_ARGS();
|
|
|
|
RESERVE_SPACE(rp->rp_buflen);
|
|
WRITEMEM(rp->rp_buf, rp->rp_buflen);
|
|
ADJUST_ARGS();
|
|
}
|
|
|
|
int
|
|
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
|
|
{
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
|
|
{
|
|
struct svc_rqst *rqstp = rq;
|
|
struct nfsd4_compoundargs *args = rqstp->rq_argp;
|
|
|
|
if (args->ops != args->iops) {
|
|
kfree(args->ops);
|
|
args->ops = args->iops;
|
|
}
|
|
kfree(args->tmpp);
|
|
args->tmpp = NULL;
|
|
while (args->to_free) {
|
|
struct tmpbuf *tb = args->to_free;
|
|
args->to_free = tb->next;
|
|
tb->release(tb->buf);
|
|
kfree(tb);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
|
|
{
|
|
args->p = p;
|
|
args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
|
|
args->pagelist = rqstp->rq_arg.pages;
|
|
args->pagelen = rqstp->rq_arg.page_len;
|
|
args->tmpp = NULL;
|
|
args->to_free = NULL;
|
|
args->ops = args->iops;
|
|
args->rqstp = rqstp;
|
|
|
|
return !nfsd4_decode_compound(args);
|
|
}
|
|
|
|
int
|
|
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
|
|
{
|
|
/*
|
|
* All that remains is to write the tag and operation count...
|
|
*/
|
|
struct nfsd4_compound_state *cs = &resp->cstate;
|
|
struct kvec *iov;
|
|
p = resp->tagp;
|
|
*p++ = htonl(resp->taglen);
|
|
memcpy(p, resp->tag, resp->taglen);
|
|
p += XDR_QUADLEN(resp->taglen);
|
|
*p++ = htonl(resp->opcnt);
|
|
|
|
if (rqstp->rq_res.page_len)
|
|
iov = &rqstp->rq_res.tail[0];
|
|
else
|
|
iov = &rqstp->rq_res.head[0];
|
|
iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
|
|
BUG_ON(iov->iov_len > PAGE_SIZE);
|
|
if (nfsd4_has_session(cs)) {
|
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
|
struct nfs4_client *clp = cs->session->se_client;
|
|
if (cs->status != nfserr_replay_cache) {
|
|
nfsd4_store_cache_entry(resp);
|
|
cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
|
|
}
|
|
/* Renew the clientid on success and on replay */
|
|
spin_lock(&nn->client_lock);
|
|
nfsd4_put_session(cs->session);
|
|
spin_unlock(&nn->client_lock);
|
|
put_client_renew(clp);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|