mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
cbd0d51a33
I just noticed that my patch "don't create on open that fails due to
ERR_GRACE" (recently commited as fb553c0f17
)
had an obvious problem that causes a deadlock on reboot recovery. Sending
in this now since it seems like a clear 2.6.16 candidate.--b.
We're returning with a lock held in some error cases.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
993 lines
28 KiB
C
993 lines
28 KiB
C
/*
|
|
* fs/nfsd/nfs4proc.c
|
|
*
|
|
* Server-side procedures for NFSv4.
|
|
*
|
|
* Copyright (c) 2002 The Regents of the University of Michigan.
|
|
* All rights reserved.
|
|
*
|
|
* Kendrick Smith <kmsmith@umich.edu>
|
|
* Andy Adamson <andros@umich.edu>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Note: some routines in this file are just trivial wrappers
|
|
* (e.g. nfsd4_lookup()) defined solely for the sake of consistent
|
|
* naming. Since all such routines have been declared "inline",
|
|
* there shouldn't be any associated overhead. At some point in
|
|
* the future, I might inline these "by hand" to clean up a
|
|
* little.
|
|
*/
|
|
|
|
#include <linux/param.h>
|
|
#include <linux/major.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/file.h>
|
|
|
|
#include <linux/sunrpc/svc.h>
|
|
#include <linux/nfsd/nfsd.h>
|
|
#include <linux/nfsd/cache.h>
|
|
#include <linux/nfs4.h>
|
|
#include <linux/nfsd/state.h>
|
|
#include <linux/nfsd/xdr4.h>
|
|
#include <linux/nfs4_acl.h>
|
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_PROC
|
|
|
|
static inline void
|
|
fh_dup2(struct svc_fh *dst, struct svc_fh *src)
|
|
{
|
|
fh_put(dst);
|
|
dget(src->fh_dentry);
|
|
if (src->fh_export)
|
|
cache_get(&src->fh_export->h);
|
|
*dst = *src;
|
|
}
|
|
|
|
static int
|
|
do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
|
|
{
|
|
int accmode, status;
|
|
|
|
if (open->op_truncate &&
|
|
!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
|
|
return nfserr_inval;
|
|
|
|
accmode = MAY_NOP;
|
|
if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
|
|
accmode = MAY_READ;
|
|
if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
|
|
accmode |= (MAY_WRITE | MAY_TRUNC);
|
|
accmode |= MAY_OWNER_OVERRIDE;
|
|
|
|
status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
|
|
{
|
|
struct svc_fh resfh;
|
|
int status;
|
|
|
|
fh_init(&resfh, NFS4_FHSIZE);
|
|
open->op_truncate = 0;
|
|
|
|
if (open->op_create) {
|
|
/*
|
|
* Note: create modes (UNCHECKED,GUARDED...) are the same
|
|
* in NFSv4 as in v3.
|
|
*/
|
|
status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
|
|
open->op_fname.len, &open->op_iattr,
|
|
&resfh, open->op_createmode,
|
|
(u32 *)open->op_verf.data, &open->op_truncate);
|
|
}
|
|
else {
|
|
status = nfsd_lookup(rqstp, current_fh,
|
|
open->op_fname.data, open->op_fname.len, &resfh);
|
|
fh_unlock(current_fh);
|
|
}
|
|
|
|
if (!status) {
|
|
set_change_info(&open->op_cinfo, current_fh);
|
|
|
|
/* set reply cache */
|
|
fh_dup2(current_fh, &resfh);
|
|
open->op_stateowner->so_replay.rp_openfh_len =
|
|
resfh.fh_handle.fh_size;
|
|
memcpy(open->op_stateowner->so_replay.rp_openfh,
|
|
&resfh.fh_handle.fh_base,
|
|
resfh.fh_handle.fh_size);
|
|
|
|
status = do_open_permission(rqstp, current_fh, open);
|
|
}
|
|
|
|
fh_put(&resfh);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
|
|
{
|
|
int status;
|
|
|
|
/* Only reclaims from previously confirmed clients are valid */
|
|
if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
|
|
return status;
|
|
|
|
/* We don't know the target directory, and therefore can not
|
|
* set the change info
|
|
*/
|
|
|
|
memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
|
|
|
|
/* set replay cache */
|
|
open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
|
|
memcpy(open->op_stateowner->so_replay.rp_openfh,
|
|
¤t_fh->fh_handle.fh_base,
|
|
current_fh->fh_handle.fh_size);
|
|
|
|
open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
|
|
(open->op_iattr.ia_size == 0);
|
|
|
|
status = do_open_permission(rqstp, current_fh, open);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
static inline int
|
|
nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, struct nfs4_stateowner **replay_owner)
|
|
{
|
|
int status;
|
|
dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
|
|
(int)open->op_fname.len, open->op_fname.data,
|
|
open->op_stateowner);
|
|
|
|
/* This check required by spec. */
|
|
if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
|
|
return nfserr_inval;
|
|
|
|
nfs4_lock_state();
|
|
|
|
/* check seqid for replay. set nfs4_owner */
|
|
status = nfsd4_process_open1(open);
|
|
if (status == NFSERR_REPLAY_ME) {
|
|
struct nfs4_replay *rp = &open->op_stateowner->so_replay;
|
|
fh_put(current_fh);
|
|
current_fh->fh_handle.fh_size = rp->rp_openfh_len;
|
|
memcpy(¤t_fh->fh_handle.fh_base, rp->rp_openfh,
|
|
rp->rp_openfh_len);
|
|
status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
if (status)
|
|
dprintk("nfsd4_open: replay failed"
|
|
" restoring previous filehandle\n");
|
|
else
|
|
status = NFSERR_REPLAY_ME;
|
|
}
|
|
if (status)
|
|
goto out;
|
|
|
|
/* Openowner is now set, so sequence id will get bumped. Now we need
|
|
* these checks before we do any creates: */
|
|
status = nfserr_grace;
|
|
if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
|
|
goto out;
|
|
status = nfserr_no_grace;
|
|
if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
|
|
goto out;
|
|
|
|
switch (open->op_claim_type) {
|
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
|
|
status = nfserr_inval;
|
|
if (open->op_create)
|
|
goto out;
|
|
/* fall through */
|
|
case NFS4_OPEN_CLAIM_NULL:
|
|
/*
|
|
* (1) set CURRENT_FH to the file being opened,
|
|
* creating it if necessary, (2) set open->op_cinfo,
|
|
* (3) set open->op_truncate if the file is to be
|
|
* truncated after opening, (4) do permission checking.
|
|
*/
|
|
status = do_open_lookup(rqstp, current_fh, open);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_PREVIOUS:
|
|
open->op_stateowner->so_confirmed = 1;
|
|
/*
|
|
* The CURRENT_FH is already set to the file being
|
|
* opened. (1) set open->op_cinfo, (2) set
|
|
* open->op_truncate if the file is to be truncated
|
|
* after opening, (3) do permission checking.
|
|
*/
|
|
status = do_open_fhandle(rqstp, current_fh, open);
|
|
if (status)
|
|
goto out;
|
|
break;
|
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
|
|
open->op_stateowner->so_confirmed = 1;
|
|
printk("NFSD: unsupported OPEN claim type %d\n",
|
|
open->op_claim_type);
|
|
status = nfserr_notsupp;
|
|
goto out;
|
|
default:
|
|
printk("NFSD: Invalid OPEN claim type %d\n",
|
|
open->op_claim_type);
|
|
status = nfserr_inval;
|
|
goto out;
|
|
}
|
|
/*
|
|
* nfsd4_process_open2() does the actual opening of the file. If
|
|
* successful, it (1) truncates the file if open->op_truncate was
|
|
* set, (2) sets open->op_stateid, (3) sets open->op_delegation.
|
|
*/
|
|
status = nfsd4_process_open2(rqstp, current_fh, open);
|
|
out:
|
|
if (open->op_stateowner) {
|
|
nfs4_get_stateowner(open->op_stateowner);
|
|
*replay_owner = open->op_stateowner;
|
|
}
|
|
nfs4_unlock_state();
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* filehandle-manipulating ops.
|
|
*/
|
|
static inline int
|
|
nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
|
|
{
|
|
if (!current_fh->fh_dentry)
|
|
return nfserr_nofilehandle;
|
|
|
|
*getfh = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
|
|
{
|
|
fh_put(current_fh);
|
|
current_fh->fh_handle.fh_size = putfh->pf_fhlen;
|
|
memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
|
|
return fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
|
|
{
|
|
int status;
|
|
|
|
fh_put(current_fh);
|
|
status = exp_pseudoroot(rqstp->rq_client, current_fh,
|
|
&rqstp->rq_chandle);
|
|
if (!status)
|
|
status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
|
|
{
|
|
if (!save_fh->fh_dentry)
|
|
return nfserr_restorefh;
|
|
|
|
fh_dup2(current_fh, save_fh);
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
|
|
{
|
|
if (!current_fh->fh_dentry)
|
|
return nfserr_nofilehandle;
|
|
|
|
fh_dup2(save_fh, current_fh);
|
|
return nfs_ok;
|
|
}
|
|
|
|
/*
|
|
* misc nfsv4 ops
|
|
*/
|
|
static inline int
|
|
nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
|
|
{
|
|
if (access->ac_req_access & ~NFS3_ACCESS_FULL)
|
|
return nfserr_inval;
|
|
|
|
access->ac_resp_access = access->ac_req_access;
|
|
return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
|
|
{
|
|
int status;
|
|
|
|
u32 *p = (u32 *)commit->co_verf.data;
|
|
*p++ = nfssvc_boot.tv_sec;
|
|
*p++ = nfssvc_boot.tv_usec;
|
|
|
|
status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
|
|
if (status == nfserr_symlink)
|
|
status = nfserr_inval;
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
|
|
{
|
|
struct svc_fh resfh;
|
|
int status;
|
|
dev_t rdev;
|
|
|
|
fh_init(&resfh, NFS4_FHSIZE);
|
|
|
|
status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
|
|
if (status == nfserr_symlink)
|
|
status = nfserr_notdir;
|
|
if (status)
|
|
return status;
|
|
|
|
switch (create->cr_type) {
|
|
case NF4LNK:
|
|
/* ugh! we have to null-terminate the linktext, or
|
|
* vfs_symlink() will choke. it is always safe to
|
|
* null-terminate by brute force, since at worst we
|
|
* will overwrite the first byte of the create namelen
|
|
* in the XDR buffer, which has already been extracted
|
|
* during XDR decode.
|
|
*/
|
|
create->cr_linkname[create->cr_linklen] = 0;
|
|
|
|
status = nfsd_symlink(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, create->cr_linkname,
|
|
create->cr_linklen, &resfh, &create->cr_iattr);
|
|
break;
|
|
|
|
case NF4BLK:
|
|
rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
|
|
if (MAJOR(rdev) != create->cr_specdata1 ||
|
|
MINOR(rdev) != create->cr_specdata2)
|
|
return nfserr_inval;
|
|
status = nfsd_create(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, &create->cr_iattr,
|
|
S_IFBLK, rdev, &resfh);
|
|
break;
|
|
|
|
case NF4CHR:
|
|
rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
|
|
if (MAJOR(rdev) != create->cr_specdata1 ||
|
|
MINOR(rdev) != create->cr_specdata2)
|
|
return nfserr_inval;
|
|
status = nfsd_create(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, &create->cr_iattr,
|
|
S_IFCHR, rdev, &resfh);
|
|
break;
|
|
|
|
case NF4SOCK:
|
|
status = nfsd_create(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, &create->cr_iattr,
|
|
S_IFSOCK, 0, &resfh);
|
|
break;
|
|
|
|
case NF4FIFO:
|
|
status = nfsd_create(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, &create->cr_iattr,
|
|
S_IFIFO, 0, &resfh);
|
|
break;
|
|
|
|
case NF4DIR:
|
|
create->cr_iattr.ia_valid &= ~ATTR_SIZE;
|
|
status = nfsd_create(rqstp, current_fh, create->cr_name,
|
|
create->cr_namelen, &create->cr_iattr,
|
|
S_IFDIR, 0, &resfh);
|
|
break;
|
|
|
|
default:
|
|
status = nfserr_badtype;
|
|
}
|
|
|
|
if (!status) {
|
|
fh_unlock(current_fh);
|
|
set_change_info(&create->cr_cinfo, current_fh);
|
|
fh_dup2(current_fh, &resfh);
|
|
}
|
|
|
|
fh_put(&resfh);
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
|
|
{
|
|
int status;
|
|
|
|
status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
if (status)
|
|
return status;
|
|
|
|
if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
|
|
return nfserr_inval;
|
|
|
|
getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
|
|
getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
|
|
|
|
getattr->ga_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
|
|
struct svc_fh *save_fh, struct nfsd4_link *link)
|
|
{
|
|
int status = nfserr_nofilehandle;
|
|
|
|
if (!save_fh->fh_dentry)
|
|
return status;
|
|
status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
|
|
if (!status)
|
|
set_change_info(&link->li_cinfo, current_fh);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
|
|
{
|
|
struct svc_fh tmp_fh;
|
|
int ret;
|
|
|
|
fh_init(&tmp_fh, NFS4_FHSIZE);
|
|
if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
|
|
&rqstp->rq_chandle)) != 0)
|
|
return ret;
|
|
if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
|
|
fh_put(&tmp_fh);
|
|
return nfserr_noent;
|
|
}
|
|
fh_put(&tmp_fh);
|
|
return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
|
|
{
|
|
return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
|
|
{
|
|
int status;
|
|
|
|
/* no need to check permission - this will be done in nfsd_read() */
|
|
|
|
read->rd_filp = NULL;
|
|
if (read->rd_offset >= OFFSET_MAX)
|
|
return nfserr_inval;
|
|
|
|
nfs4_lock_state();
|
|
/* check stateid */
|
|
if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
|
|
CHECK_FH | RD_STATE, &read->rd_filp))) {
|
|
dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
|
|
goto out;
|
|
}
|
|
if (read->rd_filp)
|
|
get_file(read->rd_filp);
|
|
status = nfs_ok;
|
|
out:
|
|
nfs4_unlock_state();
|
|
read->rd_rqstp = rqstp;
|
|
read->rd_fhp = current_fh;
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
|
|
{
|
|
u64 cookie = readdir->rd_cookie;
|
|
static const nfs4_verifier zeroverf;
|
|
|
|
/* no need to check permission - this will be done in nfsd_readdir() */
|
|
|
|
if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
|
|
return nfserr_inval;
|
|
|
|
readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
|
|
readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
|
|
|
|
if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
|
|
(cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
|
|
return nfserr_bad_cookie;
|
|
|
|
readdir->rd_rqstp = rqstp;
|
|
readdir->rd_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
|
|
{
|
|
readlink->rl_rqstp = rqstp;
|
|
readlink->rl_fhp = current_fh;
|
|
return nfs_ok;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
|
|
{
|
|
int status;
|
|
|
|
if (nfs4_in_grace())
|
|
return nfserr_grace;
|
|
status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
|
|
if (status == nfserr_symlink)
|
|
return nfserr_notdir;
|
|
if (!status) {
|
|
fh_unlock(current_fh);
|
|
set_change_info(&remove->rm_cinfo, current_fh);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
|
|
struct svc_fh *save_fh, struct nfsd4_rename *rename)
|
|
{
|
|
int status = nfserr_nofilehandle;
|
|
|
|
if (!save_fh->fh_dentry)
|
|
return status;
|
|
if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags
|
|
& NFSEXP_NOSUBTREECHECK))
|
|
return nfserr_grace;
|
|
status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
|
|
rename->rn_snamelen, current_fh,
|
|
rename->rn_tname, rename->rn_tnamelen);
|
|
|
|
/* the underlying filesystem returns different error's than required
|
|
* by NFSv4. both save_fh and current_fh have been verified.. */
|
|
if (status == nfserr_isdir)
|
|
status = nfserr_exist;
|
|
else if ((status == nfserr_notdir) &&
|
|
(S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
|
|
S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
|
|
status = nfserr_exist;
|
|
else if (status == nfserr_symlink)
|
|
status = nfserr_notdir;
|
|
|
|
if (!status) {
|
|
set_change_info(&rename->rn_sinfo, current_fh);
|
|
set_change_info(&rename->rn_tinfo, save_fh);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
|
|
{
|
|
int status = nfs_ok;
|
|
|
|
if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
|
|
nfs4_lock_state();
|
|
status = nfs4_preprocess_stateid_op(current_fh,
|
|
&setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
|
|
nfs4_unlock_state();
|
|
if (status) {
|
|
dprintk("NFSD: nfsd4_setattr: couldn't process stateid!");
|
|
return status;
|
|
}
|
|
}
|
|
status = nfs_ok;
|
|
if (setattr->sa_acl != NULL)
|
|
status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
|
|
if (status)
|
|
return status;
|
|
status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
|
|
0, (time_t)0);
|
|
return status;
|
|
}
|
|
|
|
static inline int
|
|
nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
|
|
{
|
|
stateid_t *stateid = &write->wr_stateid;
|
|
struct file *filp = NULL;
|
|
u32 *p;
|
|
int status = nfs_ok;
|
|
|
|
/* no need to check permission - this will be done in nfsd_write() */
|
|
|
|
if (write->wr_offset >= OFFSET_MAX)
|
|
return nfserr_inval;
|
|
|
|
nfs4_lock_state();
|
|
status = nfs4_preprocess_stateid_op(current_fh, stateid,
|
|
CHECK_FH | WR_STATE, &filp);
|
|
if (filp)
|
|
get_file(filp);
|
|
nfs4_unlock_state();
|
|
|
|
if (status) {
|
|
dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
|
|
return status;
|
|
}
|
|
|
|
write->wr_bytes_written = write->wr_buflen;
|
|
write->wr_how_written = write->wr_stable_how;
|
|
p = (u32 *)write->wr_verifier.data;
|
|
*p++ = nfssvc_boot.tv_sec;
|
|
*p++ = nfssvc_boot.tv_usec;
|
|
|
|
status = nfsd_write(rqstp, current_fh, filp, write->wr_offset,
|
|
write->wr_vec, write->wr_vlen, write->wr_buflen,
|
|
&write->wr_how_written);
|
|
if (filp)
|
|
fput(filp);
|
|
|
|
if (status == nfserr_symlink)
|
|
status = nfserr_inval;
|
|
return status;
|
|
}
|
|
|
|
/* This routine never returns NFS_OK! If there are no other errors, it
|
|
* will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
|
|
* attributes matched. VERIFY is implemented by mapping NFSERR_SAME
|
|
* to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
|
|
*/
|
|
static int
|
|
nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
|
|
{
|
|
u32 *buf, *p;
|
|
int count;
|
|
int status;
|
|
|
|
status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
|
|
if (status)
|
|
return status;
|
|
|
|
if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
|
|
|| (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
|
|
return nfserr_attrnotsupp;
|
|
if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
|
|
|| (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
|
|
return nfserr_inval;
|
|
if (verify->ve_attrlen & 3)
|
|
return nfserr_inval;
|
|
|
|
/* count in words:
|
|
* bitmap_len(1) + bitmap(2) + attr_len(1) = 4
|
|
*/
|
|
count = 4 + (verify->ve_attrlen >> 2);
|
|
buf = kmalloc(count << 2, GFP_KERNEL);
|
|
if (!buf)
|
|
return nfserr_resource;
|
|
|
|
status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
|
|
current_fh->fh_dentry, buf,
|
|
&count, verify->ve_bmval,
|
|
rqstp);
|
|
|
|
/* this means that nfsd4_encode_fattr() ran out of space */
|
|
if (status == nfserr_resource && count == 0)
|
|
status = nfserr_not_same;
|
|
if (status)
|
|
goto out_kfree;
|
|
|
|
p = buf + 3;
|
|
status = nfserr_not_same;
|
|
if (ntohl(*p++) != verify->ve_attrlen)
|
|
goto out_kfree;
|
|
if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
|
|
status = nfserr_same;
|
|
|
|
out_kfree:
|
|
kfree(buf);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* NULL call.
|
|
*/
|
|
static int
|
|
nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
|
|
{
|
|
return nfs_ok;
|
|
}
|
|
|
|
|
|
/*
|
|
* COMPOUND call.
|
|
*/
|
|
static int
|
|
nfsd4_proc_compound(struct svc_rqst *rqstp,
|
|
struct nfsd4_compoundargs *args,
|
|
struct nfsd4_compoundres *resp)
|
|
{
|
|
struct nfsd4_op *op;
|
|
struct svc_fh *current_fh = NULL;
|
|
struct svc_fh *save_fh = NULL;
|
|
struct nfs4_stateowner *replay_owner = NULL;
|
|
int slack_space; /* in words, not bytes! */
|
|
int status;
|
|
|
|
status = nfserr_resource;
|
|
current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
|
|
if (current_fh == NULL)
|
|
goto out;
|
|
fh_init(current_fh, NFS4_FHSIZE);
|
|
save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
|
|
if (save_fh == NULL)
|
|
goto out;
|
|
fh_init(save_fh, NFS4_FHSIZE);
|
|
|
|
resp->xbuf = &rqstp->rq_res;
|
|
resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
|
|
resp->tagp = resp->p;
|
|
/* reserve space for: taglen, tag, and opcnt */
|
|
resp->p += 2 + XDR_QUADLEN(args->taglen);
|
|
resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
|
|
resp->taglen = args->taglen;
|
|
resp->tag = args->tag;
|
|
resp->opcnt = 0;
|
|
resp->rqstp = rqstp;
|
|
|
|
/*
|
|
* According to RFC3010, this takes precedence over all other errors.
|
|
*/
|
|
status = nfserr_minor_vers_mismatch;
|
|
if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
|
|
goto out;
|
|
|
|
status = nfs_ok;
|
|
while (!status && resp->opcnt < args->opcnt) {
|
|
op = &args->ops[resp->opcnt++];
|
|
|
|
dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum);
|
|
|
|
/*
|
|
* The XDR decode routines may have pre-set op->status;
|
|
* for example, if there is a miscellaneous XDR error
|
|
* it will be set to nfserr_bad_xdr.
|
|
*/
|
|
if (op->status)
|
|
goto encode_op;
|
|
|
|
/* We must be able to encode a successful response to
|
|
* this operation, with enough room left over to encode a
|
|
* failed response to the next operation. If we don't
|
|
* have enough room, fail with ERR_RESOURCE.
|
|
*/
|
|
/* FIXME - is slack_space *really* words, or bytes??? - neilb */
|
|
slack_space = (char *)resp->end - (char *)resp->p;
|
|
if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
|
|
BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
|
|
op->status = nfserr_resource;
|
|
goto encode_op;
|
|
}
|
|
|
|
/* All operations except RENEW, SETCLIENTID, RESTOREFH
|
|
* SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
|
|
* require a valid current filehandle
|
|
*/
|
|
if ((!current_fh->fh_dentry) &&
|
|
!((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
|
|
(op->opnum == OP_SETCLIENTID) ||
|
|
(op->opnum == OP_SETCLIENTID_CONFIRM) ||
|
|
(op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
|
|
(op->opnum == OP_RELEASE_LOCKOWNER))) {
|
|
op->status = nfserr_nofilehandle;
|
|
goto encode_op;
|
|
}
|
|
switch (op->opnum) {
|
|
case OP_ACCESS:
|
|
op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
|
|
break;
|
|
case OP_CLOSE:
|
|
op->status = nfsd4_close(rqstp, current_fh, &op->u.close, &replay_owner);
|
|
break;
|
|
case OP_COMMIT:
|
|
op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
|
|
break;
|
|
case OP_CREATE:
|
|
op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
|
|
break;
|
|
case OP_DELEGRETURN:
|
|
op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
|
|
break;
|
|
case OP_GETATTR:
|
|
op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
|
|
break;
|
|
case OP_GETFH:
|
|
op->status = nfsd4_getfh(current_fh, &op->u.getfh);
|
|
break;
|
|
case OP_LINK:
|
|
op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
|
|
break;
|
|
case OP_LOCK:
|
|
op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock, &replay_owner);
|
|
break;
|
|
case OP_LOCKT:
|
|
op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
|
|
break;
|
|
case OP_LOCKU:
|
|
op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku, &replay_owner);
|
|
break;
|
|
case OP_LOOKUP:
|
|
op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
|
|
break;
|
|
case OP_LOOKUPP:
|
|
op->status = nfsd4_lookupp(rqstp, current_fh);
|
|
break;
|
|
case OP_NVERIFY:
|
|
op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
|
|
if (op->status == nfserr_not_same)
|
|
op->status = nfs_ok;
|
|
break;
|
|
case OP_OPEN:
|
|
op->status = nfsd4_open(rqstp, current_fh, &op->u.open, &replay_owner);
|
|
break;
|
|
case OP_OPEN_CONFIRM:
|
|
op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm, &replay_owner);
|
|
break;
|
|
case OP_OPEN_DOWNGRADE:
|
|
op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade, &replay_owner);
|
|
break;
|
|
case OP_PUTFH:
|
|
op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
|
|
break;
|
|
case OP_PUTROOTFH:
|
|
op->status = nfsd4_putrootfh(rqstp, current_fh);
|
|
break;
|
|
case OP_READ:
|
|
op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
|
|
break;
|
|
case OP_READDIR:
|
|
op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
|
|
break;
|
|
case OP_READLINK:
|
|
op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
|
|
break;
|
|
case OP_REMOVE:
|
|
op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
|
|
break;
|
|
case OP_RENAME:
|
|
op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
|
|
break;
|
|
case OP_RENEW:
|
|
op->status = nfsd4_renew(&op->u.renew);
|
|
break;
|
|
case OP_RESTOREFH:
|
|
op->status = nfsd4_restorefh(current_fh, save_fh);
|
|
break;
|
|
case OP_SAVEFH:
|
|
op->status = nfsd4_savefh(current_fh, save_fh);
|
|
break;
|
|
case OP_SETATTR:
|
|
op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
|
|
break;
|
|
case OP_SETCLIENTID:
|
|
op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
|
|
break;
|
|
case OP_SETCLIENTID_CONFIRM:
|
|
op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
|
|
break;
|
|
case OP_VERIFY:
|
|
op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
|
|
if (op->status == nfserr_same)
|
|
op->status = nfs_ok;
|
|
break;
|
|
case OP_WRITE:
|
|
op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
|
|
break;
|
|
case OP_RELEASE_LOCKOWNER:
|
|
op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
|
|
break;
|
|
default:
|
|
BUG_ON(op->status == nfs_ok);
|
|
break;
|
|
}
|
|
|
|
encode_op:
|
|
if (op->status == NFSERR_REPLAY_ME) {
|
|
op->replay = &replay_owner->so_replay;
|
|
nfsd4_encode_replay(resp, op);
|
|
status = op->status = op->replay->rp_status;
|
|
} else {
|
|
nfsd4_encode_operation(resp, op);
|
|
status = op->status;
|
|
}
|
|
if (replay_owner && (replay_owner != (void *)(-1))) {
|
|
nfs4_put_stateowner(replay_owner);
|
|
replay_owner = NULL;
|
|
}
|
|
/* XXX Ugh, we need to get rid of this kind of special case: */
|
|
if (op->opnum == OP_READ && op->u.read.rd_filp)
|
|
fput(op->u.read.rd_filp);
|
|
}
|
|
|
|
out:
|
|
nfsd4_release_compoundargs(args);
|
|
if (current_fh)
|
|
fh_put(current_fh);
|
|
kfree(current_fh);
|
|
if (save_fh)
|
|
fh_put(save_fh);
|
|
kfree(save_fh);
|
|
return status;
|
|
}
|
|
|
|
#define nfs4svc_decode_voidargs NULL
|
|
#define nfs4svc_release_void NULL
|
|
#define nfsd4_voidres nfsd4_voidargs
|
|
#define nfs4svc_release_compound NULL
|
|
struct nfsd4_voidargs { int dummy; };
|
|
|
|
#define PROC(name, argt, rest, relt, cache, respsize) \
|
|
{ (svc_procfunc) nfsd4_proc_##name, \
|
|
(kxdrproc_t) nfs4svc_decode_##argt##args, \
|
|
(kxdrproc_t) nfs4svc_encode_##rest##res, \
|
|
(kxdrproc_t) nfs4svc_release_##relt, \
|
|
sizeof(struct nfsd4_##argt##args), \
|
|
sizeof(struct nfsd4_##rest##res), \
|
|
0, \
|
|
cache, \
|
|
respsize, \
|
|
}
|
|
|
|
/*
|
|
* TODO: At the present time, the NFSv4 server does not do XID caching
|
|
* of requests. Implementing XID caching would not be a serious problem,
|
|
* although it would require a mild change in interfaces since one
|
|
* doesn't know whether an NFSv4 request is idempotent until after the
|
|
* XDR decode. However, XID caching totally confuses pynfs (Peter
|
|
* Astrand's regression testsuite for NFSv4 servers), which reuses
|
|
* XID's liberally, so I've left it unimplemented until pynfs generates
|
|
* better XID's.
|
|
*/
|
|
static struct svc_procedure nfsd_procedures4[2] = {
|
|
PROC(null, void, void, void, RC_NOCACHE, 1),
|
|
PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
|
|
};
|
|
|
|
struct svc_version nfsd_version4 = {
|
|
.vs_vers = 4,
|
|
.vs_nproc = 2,
|
|
.vs_proc = nfsd_procedures4,
|
|
.vs_dispatch = nfsd_dispatch,
|
|
.vs_xdrsize = NFS4_SVC_XDRSIZE,
|
|
};
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|