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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/fs/nfsd/nfs4proc.c

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54 KiB
C
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/*
* 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.
*/
#include <linux/file.h>
#include <linux/slab.h>
#include "idmap.h"
#include "cache.h"
#include "xdr4.h"
#include "vfs.h"
#include "current_stateid.h"
#include "netns.h"
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
static inline void
nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
{
struct inode *inode = resfh->fh_dentry->d_inode;
int status;
mutex_lock(&inode->i_mutex);
status = security_inode_setsecctx(resfh->fh_dentry,
label->data, label->len);
mutex_unlock(&inode->i_mutex);
if (status)
/*
* XXX: We should really fail the whole open, but we may
* already have created a new file, so it may be too
* late. For now this seems the least of evils:
*/
bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
return;
}
#else
static inline void
nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
{ }
#endif
#define NFSDDBG_FACILITY NFSDDBG_PROC
static u32 nfsd_attrmask[] = {
NFSD_WRITEABLE_ATTRS_WORD0,
NFSD_WRITEABLE_ATTRS_WORD1,
NFSD_WRITEABLE_ATTRS_WORD2
};
static u32 nfsd41_ex_attrmask[] = {
NFSD_SUPPATTR_EXCLCREAT_WORD0,
NFSD_SUPPATTR_EXCLCREAT_WORD1,
NFSD_SUPPATTR_EXCLCREAT_WORD2
};
static __be32
check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
u32 *bmval, u32 *writable)
{
struct dentry *dentry = cstate->current_fh.fh_dentry;
/*
* Check about attributes are supported by the NFSv4 server or not.
* According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
*/
if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
(bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
(bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
return nfserr_attrnotsupp;
/*
* Check FATTR4_WORD0_ACL can be supported
* in current environment or not.
*/
if (bmval[0] & FATTR4_WORD0_ACL) {
if (!IS_POSIXACL(dentry->d_inode))
return nfserr_attrnotsupp;
}
/*
* According to spec, read-only attributes return ERR_INVAL.
*/
if (writable) {
if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
(bmval[2] & ~writable[2]))
return nfserr_inval;
}
return nfs_ok;
}
static __be32
nfsd4_check_open_attributes(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
{
__be32 status = nfs_ok;
if (open->op_create == NFS4_OPEN_CREATE) {
if (open->op_createmode == NFS4_CREATE_UNCHECKED
|| open->op_createmode == NFS4_CREATE_GUARDED)
status = check_attr_support(rqstp, cstate,
open->op_bmval, nfsd_attrmask);
else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
status = check_attr_support(rqstp, cstate,
open->op_bmval, nfsd41_ex_attrmask);
}
return status;
}
static int
is_create_with_attrs(struct nfsd4_open *open)
{
return open->op_create == NFS4_OPEN_CREATE
&& (open->op_createmode == NFS4_CREATE_UNCHECKED
|| open->op_createmode == NFS4_CREATE_GUARDED
|| open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
}
/*
* if error occurs when setting the acl, just clear the acl bit
* in the returned attr bitmap.
*/
static void
do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct nfs4_acl *acl, u32 *bmval)
{
__be32 status;
status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
if (status)
/*
* We should probably fail the whole open at this point,
* but we've already created the file, so it's too late;
* So this seems the least of evils:
*/
bmval[0] &= ~FATTR4_WORD0_ACL;
}
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 __be32
do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
{
__be32 status;
if (open->op_truncate &&
!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
return nfserr_inval;
accmode |= NFSD_MAY_READ_IF_EXEC;
if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
accmode |= NFSD_MAY_READ;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
if (open->op_share_deny & NFS4_SHARE_DENY_READ)
accmode |= NFSD_MAY_WRITE;
status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
return status;
}
static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
{
umode_t mode = fh->fh_dentry->d_inode->i_mode;
if (S_ISREG(mode))
return nfs_ok;
if (S_ISDIR(mode))
return nfserr_isdir;
/*
* Using err_symlink as our catch-all case may look odd; but
* there's no other obvious error for this case in 4.0, and we
* happen to know that it will cause the linux v4 client to do
* the right thing on attempts to open something other than a
* regular file.
*/
return nfserr_symlink;
}
static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
{
if (nfsd4_has_session(cstate))
return;
fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
&resfh->fh_handle);
}
static __be32
do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
{
struct svc_fh *current_fh = &cstate->current_fh;
struct svc_fh *resfh;
int accmode;
__be32 status;
resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
if (!resfh)
return nfserr_jukebox;
fh_init(resfh, NFS4_FHSIZE);
open->op_truncate = 0;
if (open->op_create) {
/* FIXME: check session persistence and pnfs flags.
* The nfsv4.1 spec requires the following semantics:
*
* Persistent | pNFS | Server REQUIRED | Client Allowed
* Reply Cache | server | |
* -------------+--------+-----------------+--------------------
* no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
* | | | (SHOULD)
* | | and EXCLUSIVE4 | or EXCLUSIVE4
* | | | (SHOULD NOT)
* no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
* yes | no | GUARDED4 | GUARDED4
* yes | yes | GUARDED4 | GUARDED4
*/
/*
* Note: create modes (UNCHECKED,GUARDED...) are the same
* in NFSv4 as in v3 except EXCLUSIVE4_1.
*/
status = do_nfsd_create(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, &open->op_created);
if (!status && open->op_label.len)
nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval);
/*
* Following rfc 3530 14.2.16, use the returned bitmask
* to indicate which attributes we used to store the
* verifier:
*/
if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
FATTR4_WORD1_TIME_MODIFY);
} else {
status = nfsd_lookup(rqstp, current_fh,
open->op_fname.data, open->op_fname.len, resfh);
fh_unlock(current_fh);
}
if (status)
goto out;
status = nfsd_check_obj_isreg(resfh);
if (status)
goto out;
if (is_create_with_attrs(open) && open->op_acl != NULL)
do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
accmode = NFSD_MAY_NOP;
if (open->op_created ||
open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
accmode |= NFSD_MAY_OWNER_OVERRIDE;
status = do_open_permission(rqstp, resfh, open, accmode);
set_change_info(&open->op_cinfo, current_fh);
fh_dup2(current_fh, resfh);
out:
fh_put(resfh);
kfree(resfh);
return status;
}
static __be32
do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
{
struct svc_fh *current_fh = &cstate->current_fh;
__be32 status;
int accmode = 0;
/* 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));
nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
(open->op_iattr.ia_size == 0);
/*
* In the delegation case, the client is telling us about an
* open that it *already* performed locally, some time ago. We
* should let it succeed now if possible.
*
* In the case of a CLAIM_FH open, on the other hand, the client
* may be counting on us to enforce permissions (the Linux 4.1
* client uses this for normal opens, for example).
*/
if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
accmode = NFSD_MAY_OWNER_OVERRIDE;
status = do_open_permission(rqstp, current_fh, open, accmode);
return status;
}
static void
copy_clientid(clientid_t *clid, struct nfsd4_session *session)
{
struct nfsd4_sessionid *sid =
(struct nfsd4_sessionid *)session->se_sessionid.data;
clid->cl_boot = sid->clientid.cl_boot;
clid->cl_id = sid->clientid.cl_id;
}
static __be32
nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_open *open)
{
__be32 status;
struct nfsd4_compoundres *resp;
struct net *net = SVC_NET(rqstp);
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
(int)open->op_fname.len, open->op_fname.data,
open->op_openowner);
/* This check required by spec. */
if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
return nfserr_inval;
open->op_created = 0;
/*
* RFC5661 18.51.3
* Before RECLAIM_COMPLETE done, server should deny new lock
*/
if (nfsd4_has_session(cstate) &&
!test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
&cstate->session->se_client->cl_flags) &&
open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
return nfserr_grace;
if (nfsd4_has_session(cstate))
copy_clientid(&open->op_clientid, cstate->session);
nfs4_lock_state();
/* check seqid for replay. set nfs4_owner */
resp = rqstp->rq_resp;
status = nfsd4_process_open1(&resp->cstate, open, nn);
if (status == nfserr_replay_me) {
struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
fh_put(&cstate->current_fh);
fh_copy_shallow(&cstate->current_fh.fh_handle,
&rp->rp_openfh);
status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
if (status)
dprintk("nfsd4_open: replay failed"
" restoring previous filehandle\n");
else
status = nfserr_replay_me;
}
if (status)
goto out;
if (open->op_xdr_error) {
status = open->op_xdr_error;
goto out;
}
status = nfsd4_check_open_attributes(rqstp, cstate, open);
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 (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
goto out;
status = nfserr_no_grace;
if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
goto out;
switch (open->op_claim_type) {
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
case NFS4_OPEN_CLAIM_NULL:
status = do_open_lookup(rqstp, cstate, open);
if (status)
goto out;
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
status = nfs4_check_open_reclaim(&open->op_clientid,
cstate->minorversion,
nn);
if (status)
goto out;
case NFS4_OPEN_CLAIM_FH:
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
status = do_open_fhandle(rqstp, cstate, open);
if (status)
goto out;
break;
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
dprintk("NFSD: unsupported OPEN claim type %d\n",
open->op_claim_type);
status = nfserr_notsupp;
goto out;
default:
dprintk("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, &cstate->current_fh, open);
WARN_ON(status && open->op_created);
out:
nfsd4_cleanup_open_state(open, status);
if (open->op_openowner && !nfsd4_has_session(cstate))
cstate->replay_owner = &open->op_openowner->oo_owner;
nfsd4_bump_seqid(cstate, status);
if (!cstate->replay_owner)
nfs4_unlock_state();
return status;
}
/*
* OPEN is the only seqid-mutating operation whose decoding can fail
* with a seqid-mutating error (specifically, decoding of user names in
* the attributes). Therefore we have to do some processing to look up
* the stateowner so that we can bump the seqid.
*/
static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
{
struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
if (!seqid_mutating_err(ntohl(op->status)))
return op->status;
if (nfsd4_has_session(cstate))
return op->status;
open->op_xdr_error = op->status;
return nfsd4_open(rqstp, cstate, open);
}
/*
* filehandle-manipulating ops.
*/
static __be32
nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct svc_fh **getfh)
{
if (!cstate->current_fh.fh_dentry)
return nfserr_nofilehandle;
*getfh = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_putfh *putfh)
{
fh_put(&cstate->current_fh);
cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
putfh->pf_fhlen);
return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
}
static __be32
nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
void *arg)
{
__be32 status;
fh_put(&cstate->current_fh);
status = exp_pseudoroot(rqstp, &cstate->current_fh);
return status;
}
static __be32
nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
void *arg)
{
if (!cstate->save_fh.fh_dentry)
return nfserr_restorefh;
fh_dup2(&cstate->current_fh, &cstate->save_fh);
if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
}
return nfs_ok;
}
static __be32
nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
void *arg)
{
if (!cstate->current_fh.fh_dentry)
return nfserr_nofilehandle;
fh_dup2(&cstate->save_fh, &cstate->current_fh);
if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
}
return nfs_ok;
}
/*
* misc nfsv4 ops
*/
static __be32
nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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, &cstate->current_fh, &access->ac_resp_access,
&access->ac_supported);
}
static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
{
__be32 verf[2];
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
memcpy(verifier->data, verf, sizeof(verifier->data));
}
static __be32
nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_commit *commit)
{
gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
commit->co_count);
}
static __be32
nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_create *create)
{
struct svc_fh resfh;
__be32 status;
dev_t rdev;
fh_init(&resfh, NFS4_FHSIZE);
status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
NFSD_MAY_CREATE);
if (status)
return status;
status = check_attr_support(rqstp, cstate, create->cr_bmval,
nfsd_attrmask);
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, &cstate->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, &cstate->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, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&create->cr_iattr,S_IFCHR, rdev, &resfh);
break;
case NF4SOCK:
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&create->cr_iattr, S_IFSOCK, 0, &resfh);
break;
case NF4FIFO:
status = nfsd_create(rqstp, &cstate->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, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&create->cr_iattr, S_IFDIR, 0, &resfh);
break;
default:
status = nfserr_badtype;
}
if (status)
goto out;
if (create->cr_label.len)
nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
if (create->cr_acl != NULL)
do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
create->cr_bmval);
fh_unlock(&cstate->current_fh);
set_change_info(&create->cr_cinfo, &cstate->current_fh);
fh_dup2(&cstate->current_fh, &resfh);
out:
fh_put(&resfh);
return status;
}
static __be32
nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_getattr *getattr)
{
__be32 status;
status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
if (status)
return status;
if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
return nfserr_inval;
getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
getattr->ga_fhp = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_link *link)
{
__be32 status = nfserr_nofilehandle;
if (!cstate->save_fh.fh_dentry)
return status;
status = nfsd_link(rqstp, &cstate->current_fh,
link->li_name, link->li_namelen, &cstate->save_fh);
if (!status)
set_change_info(&link->li_cinfo, &cstate->current_fh);
return status;
}
static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
{
struct svc_fh tmp_fh;
__be32 ret;
fh_init(&tmp_fh, NFS4_FHSIZE);
ret = exp_pseudoroot(rqstp, &tmp_fh);
if (ret)
return ret;
if (tmp_fh.fh_dentry == fh->fh_dentry) {
fh_put(&tmp_fh);
return nfserr_noent;
}
fh_put(&tmp_fh);
return nfsd_lookup(rqstp, fh, "..", 2, fh);
}
static __be32
nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
void *arg)
{
return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
}
static __be32
nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_lookup *lookup)
{
return nfsd_lookup(rqstp, &cstate->current_fh,
lookup->lo_name, lookup->lo_len,
&cstate->current_fh);
}
static __be32
nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_read *read)
{
__be32 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;
/*
* If we do a zero copy read, then a client will see read data
* that reflects the state of the file *after* performing the
* following compound.
*
* To ensure proper ordering, we therefore turn off zero copy if
* the client wants us to do more in this compound:
*/
if (!nfsd4_last_compound_op(rqstp))
rqstp->rq_splice_ok = false;
nfs4_lock_state();
/* check stateid */
if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
cstate, &read->rd_stateid,
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 = &cstate->current_fh;
return status;
}
static __be32
nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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_suppattrs0(cstate->minorversion);
readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
if ((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 = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_readlink *readlink)
{
readlink->rl_rqstp = rqstp;
readlink->rl_fhp = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_remove *remove)
{
__be32 status;
if (locks_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
remove->rm_name, remove->rm_namelen);
if (!status) {
fh_unlock(&cstate->current_fh);
set_change_info(&remove->rm_cinfo, &cstate->current_fh);
}
return status;
}
static __be32
nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_rename *rename)
{
__be32 status = nfserr_nofilehandle;
if (!cstate->save_fh.fh_dentry)
return status;
if (locks_in_grace(SVC_NET(rqstp)) &&
!(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
return nfserr_grace;
status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
rename->rn_snamelen, &cstate->current_fh,
rename->rn_tname, rename->rn_tnamelen);
if (status)
return status;
set_change_info(&rename->rn_sinfo, &cstate->current_fh);
set_change_info(&rename->rn_tinfo, &cstate->save_fh);
return nfs_ok;
}
static __be32
nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_secinfo *secinfo)
{
struct svc_fh resfh;
struct svc_export *exp;
struct dentry *dentry;
__be32 err;
fh_init(&resfh, NFS4_FHSIZE);
err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
if (err)
return err;
err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
secinfo->si_name, secinfo->si_namelen,
&exp, &dentry);
if (err)
return err;
if (dentry->d_inode == NULL) {
exp_put(exp);
err = nfserr_noent;
} else
secinfo->si_exp = exp;
dput(dentry);
if (cstate->minorversion)
/* See rfc 5661 section 2.6.3.1.1.8 */
fh_put(&cstate->current_fh);
return err;
}
static __be32
nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_secinfo_no_name *sin)
{
__be32 err;
switch (sin->sin_style) {
case NFS4_SECINFO_STYLE4_CURRENT_FH:
break;
case NFS4_SECINFO_STYLE4_PARENT:
err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
if (err)
return err;
break;
default:
return nfserr_inval;
}
exp_get(cstate->current_fh.fh_export);
sin->sin_exp = cstate->current_fh.fh_export;
fh_put(&cstate->current_fh);
return nfs_ok;
}
static __be32
nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setattr *setattr)
{
__be32 status = nfs_ok;
int err;
if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
nfs4_lock_state();
status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
&setattr->sa_stateid, WR_STATE, NULL);
nfs4_unlock_state();
if (status) {
dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
return status;
}
}
err = fh_want_write(&cstate->current_fh);
if (err)
return nfserrno(err);
status = nfs_ok;
status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
nfsd_attrmask);
if (status)
goto out;
if (setattr->sa_acl != NULL)
status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
setattr->sa_acl);
if (status)
goto out;
if (setattr->sa_label.len)
status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
&setattr->sa_label);
if (status)
goto out;
status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
0, (time_t)0);
out:
fh_drop_write(&cstate->current_fh);
return status;
}
static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
{
int i = 1;
int buflen = write->wr_buflen;
vec[0].iov_base = write->wr_head.iov_base;
vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
buflen -= vec[0].iov_len;
while (buflen) {
vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
buflen -= vec[i].iov_len;
i++;
}
return i;
}
static __be32
nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_write *write)
{
stateid_t *stateid = &write->wr_stateid;
struct file *filp = NULL;
__be32 status = nfs_ok;
unsigned long cnt;
int nvecs;
/* 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(SVC_NET(rqstp),
cstate, stateid, WR_STATE, &filp);
if (status) {
nfs4_unlock_state();
dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
return status;
}
if (filp)
get_file(filp);
nfs4_unlock_state();
cnt = write->wr_buflen;
write->wr_how_written = write->wr_stable_how;
gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
nvecs = fill_in_write_vector(rqstp->rq_vec, write);
WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
status = nfsd_write(rqstp, &cstate->current_fh, filp,
write->wr_offset, rqstp->rq_vec, nvecs,
&cnt, &write->wr_how_written);
if (filp)
fput(filp);
write->wr_bytes_written = cnt;
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 __be32
_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_verify *verify)
{
__be32 *buf, *p;
int count;
__be32 status;
status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
if (status)
return status;
status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
if (status)
return status;
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_jukebox;
p = buf;
status = nfsd4_encode_fattr(&cstate->current_fh,
cstate->current_fh.fh_export,
cstate->current_fh.fh_dentry, &p,
count, verify->ve_bmval,
rqstp, 0);
/* this means that nfsd4_encode_fattr() ran out of space */
if (status == nfserr_resource)
status = nfserr_not_same;
if (status)
goto out_kfree;
/* skip bitmap */
p = buf + 1 + ntohl(buf[0]);
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;
}
static __be32
nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_verify *verify)
{
__be32 status;
status = _nfsd4_verify(rqstp, cstate, verify);
return status == nfserr_not_same ? nfs_ok : status;
}
static __be32
nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_verify *verify)
{
__be32 status;
status = _nfsd4_verify(rqstp, cstate, verify);
return status == nfserr_same ? nfs_ok : status;
}
/*
* NULL call.
*/
static __be32
nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
{
return nfs_ok;
}
static inline void nfsd4_increment_op_stats(u32 opnum)
{
if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
nfsdstats.nfs4_opcount[opnum]++;
}
typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
void *);
typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
enum nfsd4_op_flags {
ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
/* For rfc 5661 section 2.6.3.1.1: */
OP_HANDLES_WRONGSEC = 1 << 3,
OP_IS_PUTFH_LIKE = 1 << 4,
/*
* These are the ops whose result size we estimate before
* encoding, to avoid performing an op then not being able to
* respond or cache a response. This includes writes and setattrs
* as well as the operations usually called "nonidempotent":
*/
OP_MODIFIES_SOMETHING = 1 << 5,
/*
* Cache compounds containing these ops in the xid-based drc:
* We use the DRC for compounds containing non-idempotent
* operations, *except* those that are 4.1-specific (since
* sessions provide their own EOS), and except for stateful
* operations other than setclientid and setclientid_confirm
* (since sequence numbers provide EOS for open, lock, etc in
* the v4.0 case).
*/
OP_CACHEME = 1 << 6,
/*
* These are ops which clear current state id.
*/
OP_CLEAR_STATEID = 1 << 7,
};
struct nfsd4_operation {
nfsd4op_func op_func;
u32 op_flags;
char *op_name;
/* Try to get response size before operation */
nfsd4op_rsize op_rsize_bop;
stateid_getter op_get_currentstateid;
stateid_setter op_set_currentstateid;
};
static struct nfsd4_operation nfsd4_ops[];
#ifdef NFSD_DEBUG
static const char *nfsd4_op_name(unsigned opnum);
#endif
/*
* Enforce NFSv4.1 COMPOUND ordering rules:
*
* Also note, enforced elsewhere:
* - SEQUENCE other than as first op results in
* NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
* - BIND_CONN_TO_SESSION must be the only op in its compound.
* (Enforced in nfsd4_bind_conn_to_session().)
* - DESTROY_SESSION must be the final operation in a compound, if
* sessionid's in SEQUENCE and DESTROY_SESSION are the same.
* (Enforced in nfsd4_destroy_session().)
*/
static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
{
struct nfsd4_op *op = &args->ops[0];
/* These ordering requirements don't apply to NFSv4.0: */
if (args->minorversion == 0)
return nfs_ok;
/* This is weird, but OK, not our problem: */
if (args->opcnt == 0)
return nfs_ok;
if (op->status == nfserr_op_illegal)
return nfs_ok;
if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
return nfserr_op_not_in_session;
if (op->opnum == OP_SEQUENCE)
return nfs_ok;
if (args->opcnt != 1)
return nfserr_not_only_op;
return nfs_ok;
}
static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
{
return &nfsd4_ops[op->opnum];
}
bool nfsd4_cache_this_op(struct nfsd4_op *op)
{
return OPDESC(op)->op_flags & OP_CACHEME;
}
static bool need_wrongsec_check(struct svc_rqst *rqstp)
{
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfsd4_compoundargs *argp = rqstp->rq_argp;
struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
struct nfsd4_op *next = &argp->ops[resp->opcnt];
struct nfsd4_operation *thisd;
struct nfsd4_operation *nextd;
thisd = OPDESC(this);
/*
* Most ops check wronsec on our own; only the putfh-like ops
* have special rules.
*/
if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
return false;
/*
* rfc 5661 2.6.3.1.1.6: don't bother erroring out a
* put-filehandle operation if we're not going to use the
* result:
*/
if (argp->opcnt == resp->opcnt)
return false;
nextd = OPDESC(next);
/*
* Rest of 2.6.3.1.1: certain operations will return WRONGSEC
* errors themselves as necessary; others should check for them
* now:
*/
return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
}
/*
* COMPOUND call.
*/
static __be32
nfsd4_proc_compound(struct svc_rqst *rqstp,
struct nfsd4_compoundargs *args,
struct nfsd4_compoundres *resp)
{
struct nfsd4_op *op;
struct nfsd4_operation *opdesc;
struct nfsd4_compound_state *cstate = &resp->cstate;
int slack_bytes;
u32 plen = 0;
__be32 status;
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;
resp->cstate.minorversion = args->minorversion;
resp->cstate.replay_owner = NULL;
resp->cstate.session = NULL;
fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
/*
* Don't use the deferral mechanism for NFSv4; compounds make it
* too hard to avoid non-idempotency problems.
*/
rqstp->rq_usedeferral = 0;
/*
* According to RFC3010, this takes precedence over all other errors.
*/
status = nfserr_minor_vers_mismatch;
if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
goto out;
status = nfs41_check_op_ordering(args);
if (status) {
op = &args->ops[0];
op->status = status;
goto encode_op;
}
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
resp->opcnt, args->opcnt, op->opnum,
nfsd4_op_name(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) {
if (op->opnum == OP_OPEN)
op->status = nfsd4_open_omfg(rqstp, cstate, op);
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.
*/
slack_bytes = (char *)resp->end - (char *)resp->p;
if (slack_bytes < COMPOUND_SLACK_SPACE
+ COMPOUND_ERR_SLACK_SPACE) {
BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
op->status = nfserr_resource;
goto encode_op;
}
opdesc = OPDESC(op);
if (!cstate->current_fh.fh_dentry) {
if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
op->status = nfserr_nofilehandle;
goto encode_op;
}
} else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
!(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
op->status = nfserr_moved;
goto encode_op;
}
/* If op is non-idempotent */
if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
plen = opdesc->op_rsize_bop(rqstp, op);
op->status = nfsd4_check_resp_size(resp, plen);
}
if (op->status)
goto encode_op;
if (opdesc->op_get_currentstateid)
opdesc->op_get_currentstateid(cstate, &op->u);
op->status = opdesc->op_func(rqstp, cstate, &op->u);
if (!op->status) {
if (opdesc->op_set_currentstateid)
opdesc->op_set_currentstateid(cstate, &op->u);
if (opdesc->op_flags & OP_CLEAR_STATEID)
clear_current_stateid(cstate);
if (need_wrongsec_check(rqstp))
op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
}
encode_op:
/* Only from SEQUENCE */
if (resp->cstate.status == nfserr_replay_cache) {
dprintk("%s NFS4.1 replay from cache\n", __func__);
status = op->status;
goto out;
}
if (op->status == nfserr_replay_me) {
op->replay = &cstate->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;
}
dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
args->ops, args->opcnt, resp->opcnt, op->opnum,
be32_to_cpu(status));
if (cstate->replay_owner) {
nfs4_unlock_state();
cstate->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);
nfsd4_increment_op_stats(op->opnum);
}
resp->cstate.status = status;
fh_put(&resp->cstate.current_fh);
fh_put(&resp->cstate.save_fh);
BUG_ON(resp->cstate.replay_owner);
out:
/* Reset deferral mechanism for RPC deferrals */
rqstp->rq_usedeferral = 1;
dprintk("nfsv4 compound returned %d\n", ntohl(status));
return status;
}
#define op_encode_hdr_size (2)
#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define op_encode_change_info_maxsz (5)
#define nfs4_fattr_bitmap_maxsz (4)
#define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
op_encode_ace_maxsz)
#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size) * sizeof(__be32);
}
static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
}
static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
* sizeof(__be32);
}
static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_stateid_maxsz
+ op_encode_change_info_maxsz + 1
+ nfs4_fattr_bitmap_maxsz
+ op_encode_delegation_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 maxcount = 0, rlen = 0;
maxcount = svc_max_payload(rqstp);
rlen = op->u.read.rd_length;
if (rlen > maxcount)
rlen = maxcount;
return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
}
static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 rlen = op->u.readdir.rd_maxcount;
if (rlen > PAGE_SIZE)
rlen = PAGE_SIZE;
return (op_encode_hdr_size + op_encode_verifier_maxsz)
* sizeof(__be32) + rlen;
}
static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ op_encode_change_info_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
}
static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
}
static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
2 + /*eir_server_owner.so_minor_id */\
/* eir_server_owner.so_major_id<> */\
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
/* eir_server_scope<> */\
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1 + /* eir_server_impl_id array length */\
0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
}
static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
}
static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2 + /* csr_sequence, csr_flags */\
op_encode_channel_attrs_maxsz + \
op_encode_channel_attrs_maxsz) * sizeof(__be32);
}
static struct nfsd4_operation nfsd4_ops[] = {
[OP_ACCESS] = {
.op_func = (nfsd4op_func)nfsd4_access,
.op_name = "OP_ACCESS",
},
[OP_CLOSE] = {
.op_func = (nfsd4op_func)nfsd4_close,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_CLOSE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
.op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
},
[OP_COMMIT] = {
.op_func = (nfsd4op_func)nfsd4_commit,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_COMMIT",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
},
[OP_CREATE] = {
.op_func = (nfsd4op_func)nfsd4_create,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
.op_name = "OP_CREATE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
},
[OP_DELEGRETURN] = {
.op_func = (nfsd4op_func)nfsd4_delegreturn,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_DELEGRETURN",
.op_rsize_bop = nfsd4_only_status_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
},
[OP_GETATTR] = {
.op_func = (nfsd4op_func)nfsd4_getattr,
.op_flags = ALLOWED_ON_ABSENT_FS,
.op_name = "OP_GETATTR",
},
[OP_GETFH] = {
.op_func = (nfsd4op_func)nfsd4_getfh,
.op_name = "OP_GETFH",
},
[OP_LINK] = {
.op_func = (nfsd4op_func)nfsd4_link,
.op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
| OP_CACHEME,
.op_name = "OP_LINK",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
},
[OP_LOCK] = {
.op_func = (nfsd4op_func)nfsd4_lock,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LOCK",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
.op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
},
[OP_LOCKT] = {
.op_func = (nfsd4op_func)nfsd4_lockt,
.op_name = "OP_LOCKT",
},
[OP_LOCKU] = {
.op_func = (nfsd4op_func)nfsd4_locku,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LOCKU",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
},
[OP_LOOKUP] = {
.op_func = (nfsd4op_func)nfsd4_lookup,
.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
.op_name = "OP_LOOKUP",
},
[OP_LOOKUPP] = {
.op_func = (nfsd4op_func)nfsd4_lookupp,
.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
.op_name = "OP_LOOKUPP",
},
[OP_NVERIFY] = {
.op_func = (nfsd4op_func)nfsd4_nverify,
.op_name = "OP_NVERIFY",
},
[OP_OPEN] = {
.op_func = (nfsd4op_func)nfsd4_open,
.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
.op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
},
[OP_OPEN_CONFIRM] = {
.op_func = (nfsd4op_func)nfsd4_open_confirm,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN_CONFIRM",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
},
[OP_OPEN_DOWNGRADE] = {
.op_func = (nfsd4op_func)nfsd4_open_downgrade,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN_DOWNGRADE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
.op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
},
[OP_PUTFH] = {
.op_func = (nfsd4op_func)nfsd4_putfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
| OP_CLEAR_STATEID,
.op_name = "OP_PUTFH",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_PUTPUBFH] = {
.op_func = (nfsd4op_func)nfsd4_putrootfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
| OP_CLEAR_STATEID,
.op_name = "OP_PUTPUBFH",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_PUTROOTFH] = {
.op_func = (nfsd4op_func)nfsd4_putrootfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
| OP_CLEAR_STATEID,
.op_name = "OP_PUTROOTFH",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_READ] = {
.op_func = (nfsd4op_func)nfsd4_read,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_READ",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
},
[OP_READDIR] = {
.op_func = (nfsd4op_func)nfsd4_readdir,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_READDIR",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
},
[OP_READLINK] = {
.op_func = (nfsd4op_func)nfsd4_readlink,
.op_name = "OP_READLINK",
},
[OP_REMOVE] = {
.op_func = (nfsd4op_func)nfsd4_remove,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_REMOVE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
},
[OP_RENAME] = {
.op_func = (nfsd4op_func)nfsd4_rename,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_RENAME",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
},
[OP_RENEW] = {
.op_func = (nfsd4op_func)nfsd4_renew,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING,
.op_name = "OP_RENEW",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_RESTOREFH] = {
.op_func = (nfsd4op_func)nfsd4_restorefh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
.op_name = "OP_RESTOREFH",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_SAVEFH] = {
.op_func = (nfsd4op_func)nfsd4_savefh,
.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
.op_name = "OP_SAVEFH",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_SECINFO] = {
.op_func = (nfsd4op_func)nfsd4_secinfo,
.op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO",
},
[OP_SETATTR] = {
.op_func = (nfsd4op_func)nfsd4_setattr,
.op_name = "OP_SETATTR",
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
},
[OP_SETCLIENTID] = {
.op_func = (nfsd4op_func)nfsd4_setclientid,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_SETCLIENTID",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
},
[OP_SETCLIENTID_CONFIRM] = {
.op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_SETCLIENTID_CONFIRM",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_VERIFY] = {
.op_func = (nfsd4op_func)nfsd4_verify,
.op_name = "OP_VERIFY",
},
[OP_WRITE] = {
.op_func = (nfsd4op_func)nfsd4_write,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_WRITE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
.op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
},
[OP_RELEASE_LOCKOWNER] = {
.op_func = (nfsd4op_func)nfsd4_release_lockowner,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING,
.op_name = "OP_RELEASE_LOCKOWNER",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
/* NFSv4.1 operations */
[OP_EXCHANGE_ID] = {
.op_func = (nfsd4op_func)nfsd4_exchange_id,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_EXCHANGE_ID",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
},
[OP_BACKCHANNEL_CTL] = {
.op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_BACKCHANNEL_CTL",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_BIND_CONN_TO_SESSION] = {
.op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_BIND_CONN_TO_SESSION",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
},
[OP_CREATE_SESSION] = {
.op_func = (nfsd4op_func)nfsd4_create_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_CREATE_SESSION",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
},
[OP_DESTROY_SESSION] = {
.op_func = (nfsd4op_func)nfsd4_destroy_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_DESTROY_SESSION",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_SEQUENCE] = {
.op_func = (nfsd4op_func)nfsd4_sequence,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
.op_name = "OP_SEQUENCE",
},
[OP_DESTROY_CLIENTID] = {
.op_func = (nfsd4op_func)nfsd4_destroy_clientid,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_DESTROY_CLIENTID",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_RECLAIM_COMPLETE] = {
.op_func = (nfsd4op_func)nfsd4_reclaim_complete,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_RECLAIM_COMPLETE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_SECINFO_NO_NAME] = {
.op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
.op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO_NO_NAME",
},
[OP_TEST_STATEID] = {
.op_func = (nfsd4op_func)nfsd4_test_stateid,
.op_flags = ALLOWED_WITHOUT_FH,
.op_name = "OP_TEST_STATEID",
},
[OP_FREE_STATEID] = {
.op_func = (nfsd4op_func)nfsd4_free_stateid,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_FREE_STATEID",
.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
};
#ifdef NFSD_DEBUG
static const char *nfsd4_op_name(unsigned opnum)
{
if (opnum < ARRAY_SIZE(nfsd4_ops))
return nfsd4_ops[opnum].op_name;
return "unknown_operation";
}
#endif
#define nfsd4_voidres nfsd4_voidargs
struct nfsd4_voidargs { int dummy; };
static struct svc_procedure nfsd_procedures4[2] = {
[NFSPROC4_NULL] = {
.pc_func = (svc_procfunc) nfsd4_proc_null,
.pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
.pc_argsize = sizeof(struct nfsd4_voidargs),
.pc_ressize = sizeof(struct nfsd4_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 1,
},
[NFSPROC4_COMPOUND] = {
.pc_func = (svc_procfunc) nfsd4_proc_compound,
.pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
.pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
.pc_argsize = sizeof(struct nfsd4_compoundargs),
.pc_ressize = sizeof(struct nfsd4_compoundres),
.pc_release = nfsd4_release_compoundargs,
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = NFSD_BUFSIZE/4,
},
};
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:
*/
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