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linux/fs/nfsd/nfs4proc.c
NeilBrown debf16f0c6 NFSD: use explicit lock/unlock for directory ops 
When creating or unlinking a name in a directory use explicit
inode_lock_nested() instead of fh_lock(), and explicit calls to
fh_fill_pre_attrs() and fh_fill_post_attrs().  This is already done
for renames, with lock_rename() as the explicit locking.

Also move the 'fill' calls closer to the operation that might change the
attributes.  This way they are avoided on some error paths.

For the v2-only code in nfsproc.c, the fill calls are not replaced as
they aren't needed.

Making the locking explicit will simplify proposed future changes to
locking for directories.  It also makes it easily visible exactly where
pre/post attributes are used - not all callers of fh_lock() actually
need the pre/post attributes.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2022-08-04 10:28:20 -04:00

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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/fs_struct.h>
#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/namei.h>
#include <linux/sunrpc/addr.h>
#include <linux/nfs_ssc.h>
#include "idmap.h"
#include "cache.h"
#include "xdr4.h"
#include "vfs.h"
#include "current_stateid.h"
#include "netns.h"
#include "acl.h"
#include "pnfs.h"
#include "trace.h"
static bool inter_copy_offload_enable;
module_param(inter_copy_offload_enable, bool, 0644);
MODULE_PARM_DESC(inter_copy_offload_enable,
"Enable inter server to server copy offload. Default: false");
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
module_param(nfsd4_ssc_umount_timeout, int, 0644);
MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
"idle msecs before unmount export from source server");
#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;
struct svc_export *exp = cstate->current_fh.fh_export;
if (!nfsd_attrs_supported(cstate->minorversion, bmval))
return nfserr_attrnotsupp;
if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
return nfserr_attrnotsupp;
if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
!(exp->ex_flags & NFSEXP_SECURITY_LABEL))
return nfserr_attrnotsupp;
if (writable && !bmval_is_subset(bmval, writable))
return nfserr_inval;
if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
(bmval[1] & FATTR4_WORD1_MODE))
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);
}
static inline void
fh_dup2(struct svc_fh *dst, struct svc_fh *src)
{
fh_put(dst);
dget(src->fh_dentry);
if (src->fh_export)
exp_get(src->fh_export);
*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 = d_inode(fh->fh_dentry)->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 inline bool nfsd4_create_is_exclusive(int createmode)
{
return createmode == NFS4_CREATE_EXCLUSIVE ||
createmode == NFS4_CREATE_EXCLUSIVE4_1;
}
static __be32
nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child,
struct nfsd4_open *open)
{
struct file *filp;
struct path path;
int oflags;
oflags = O_CREAT | O_LARGEFILE;
switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) {
case NFS4_SHARE_ACCESS_WRITE:
oflags |= O_WRONLY;
break;
case NFS4_SHARE_ACCESS_BOTH:
oflags |= O_RDWR;
break;
default:
oflags |= O_RDONLY;
}
path.mnt = fhp->fh_export->ex_path.mnt;
path.dentry = child;
filp = dentry_create(&path, oflags, open->op_iattr.ia_mode,
current_cred());
if (IS_ERR(filp))
return nfserrno(PTR_ERR(filp));
open->op_filp = filp;
return nfs_ok;
}
/*
* Implement NFSv4's unchecked, guarded, and exclusive create
* semantics for regular files. Open state for this new file is
* subsequently fabricated in nfsd4_process_open2().
*
* Upon return, caller must release @fhp and @resfhp.
*/
static __be32
nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct svc_fh *resfhp, struct nfsd4_open *open)
{
struct iattr *iap = &open->op_iattr;
struct nfsd_attrs attrs = {
.na_iattr = iap,
.na_seclabel = &open->op_label,
};
struct dentry *parent, *child;
__u32 v_mtime, v_atime;
struct inode *inode;
__be32 status;
int host_err;
if (isdotent(open->op_fname, open->op_fnamelen))
return nfserr_exist;
if (!(iap->ia_valid & ATTR_MODE))
iap->ia_mode = 0;
status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
if (status != nfs_ok)
return status;
parent = fhp->fh_dentry;
inode = d_inode(parent);
host_err = fh_want_write(fhp);
if (host_err)
return nfserrno(host_err);
if (is_create_with_attrs(open))
nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
inode_lock_nested(inode, I_MUTEX_PARENT);
child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
if (IS_ERR(child)) {
status = nfserrno(PTR_ERR(child));
goto out;
}
if (d_really_is_negative(child)) {
status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
if (status != nfs_ok)
goto out;
}
status = fh_compose(resfhp, fhp->fh_export, child, fhp);
if (status != nfs_ok)
goto out;
v_mtime = 0;
v_atime = 0;
if (nfsd4_create_is_exclusive(open->op_createmode)) {
u32 *verifier = (u32 *)open->op_verf.data;
/*
* Solaris 7 gets confused (bugid 4218508) if these have
* the high bit set, as do xfs filesystems without the
* "bigtime" feature. So just clear the high bits. If this
* is ever changed to use different attrs for storing the
* verifier, then do_open_lookup() will also need to be
* fixed accordingly.
*/
v_mtime = verifier[0] & 0x7fffffff;
v_atime = verifier[1] & 0x7fffffff;
}
if (d_really_is_positive(child)) {
status = nfs_ok;
/* NFSv4 protocol requires change attributes even though
* no change happened.
*/
fh_fill_both_attrs(fhp);
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
if (!d_is_reg(child))
break;
/*
* In NFSv4, we don't want to truncate the file
* now. This would be wrong if the OPEN fails for
* some other reason. Furthermore, if the size is
* nonzero, we should ignore it according to spec!
*/
open->op_truncate = (iap->ia_valid & ATTR_SIZE) &&
!iap->ia_size;
break;
case NFS4_CREATE_GUARDED:
status = nfserr_exist;
break;
case NFS4_CREATE_EXCLUSIVE:
if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
d_inode(child)->i_atime.tv_sec == v_atime &&
d_inode(child)->i_size == 0) {
open->op_created = true;
break; /* subtle */
}
status = nfserr_exist;
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
d_inode(child)->i_atime.tv_sec == v_atime &&
d_inode(child)->i_size == 0) {
open->op_created = true;
goto set_attr; /* subtle */
}
status = nfserr_exist;
}
goto out;
}
if (!IS_POSIXACL(inode))
iap->ia_mode &= ~current_umask();
fh_fill_pre_attrs(fhp);
status = nfsd4_vfs_create(fhp, child, open);
if (status != nfs_ok)
goto out;
open->op_created = true;
fh_fill_post_attrs(fhp);
/* A newly created file already has a file size of zero. */
if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
iap->ia_valid &= ~ATTR_SIZE;
if (nfsd4_create_is_exclusive(open->op_createmode)) {
iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
ATTR_MTIME_SET|ATTR_ATIME_SET;
iap->ia_mtime.tv_sec = v_mtime;
iap->ia_atime.tv_sec = v_atime;
iap->ia_mtime.tv_nsec = 0;
iap->ia_atime.tv_nsec = 0;
}
set_attr:
status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
if (attrs.na_labelerr)
open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
if (attrs.na_aclerr)
open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
out:
inode_unlock(inode);
nfsd_attrs_free(&attrs);
if (child && !IS_ERR(child))
dput(child);
fh_drop_write(fhp);
return status;
}
static __be32
do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
{
struct svc_fh *current_fh = &cstate->current_fh;
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 = false;
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
*/
current->fs->umask = open->op_umask;
status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
current->fs->umask = 0;
/*
* Following rfc 3530 14.2.16, and rfc 5661 18.16.4
* use the returned bitmask to indicate which attributes
* we used to store the verifier:
*/
if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0)
open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
FATTR4_WORD1_TIME_MODIFY);
} else {
status = nfsd_lookup(rqstp, current_fh,
open->op_fname, open->op_fnamelen, *resfh);
if (!status)
/* NFSv4 protocol requires change attributes even though
* no change happened.
*/
fh_fill_both_attrs(current_fh);
}
if (status)
goto out;
status = nfsd_check_obj_isreg(*resfh);
if (status)
goto out;
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);
out:
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,
union nfsd4_op_u *u)
{
struct nfsd4_open *open = &u->open;
__be32 status;
struct svc_fh *resfh = NULL;
struct net *net = SVC_NET(rqstp);
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
bool reclaim = false;
dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
(int)open->op_fnamelen, open->op_fname,
open->op_openowner);
open->op_filp = NULL;
open->op_rqstp = rqstp;
/* This check required by spec. */
if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
return nfserr_inval;
open->op_created = false;
/*
* 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->clp->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);
/* check seqid for replay. set nfs4_owner */
status = nfsd4_process_open1(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 (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
goto out;
status = nfserr_no_grace;
if (!opens_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, &resfh);
if (status)
goto out;
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
status = nfs4_check_open_reclaim(cstate->clp);
if (status)
goto out;
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
reclaim = true;
fallthrough;
case NFS4_OPEN_CLAIM_FH:
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
status = do_open_fhandle(rqstp, cstate, open);
if (status)
goto out;
resfh = &cstate->current_fh;
break;
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
status = nfserr_notsupp;
goto out;
default:
status = nfserr_inval;
goto out;
}
status = nfsd4_process_open2(rqstp, resfh, open);
if (status && open->op_created)
pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n",
be32_to_cpu(status));
if (reclaim && !status)
nn->somebody_reclaimed = true;
out:
if (open->op_filp) {
fput(open->op_filp);
open->op_filp = NULL;
}
if (resfh && resfh != &cstate->current_fh) {
fh_dup2(&cstate->current_fh, resfh);
fh_put(resfh);
kfree(resfh);
}
nfsd4_cleanup_open_state(cstate, open);
nfsd4_bump_seqid(cstate, status);
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 = &op->u.open;
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, &op->u);
}
/*
* filehandle-manipulating ops.
*/
static __be32
nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
u->getfh = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_putfh *putfh = &u->putfh;
__be32 ret;
fh_put(&cstate->current_fh);
cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
putfh->pf_fhlen);
ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
if (ret == nfserr_stale && putfh->no_verify) {
SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
ret = 0;
}
#endif
return ret;
}
static __be32
nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
__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,
union nfsd4_op_u *u)
{
if (!cstate->save_fh.fh_dentry)
return nfserr_restorefh;
fh_dup2(&cstate->current_fh, &cstate->save_fh);
if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
}
return nfs_ok;
}
static __be32
nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
fh_dup2(&cstate->save_fh, &cstate->current_fh);
if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
}
return nfs_ok;
}
/*
* misc nfsv4 ops
*/
static __be32
nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_access *access = &u->access;
u32 access_full;
access_full = NFS3_ACCESS_FULL;
if (cstate->minorversion >= 2)
access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
NFS4_ACCESS_XAWRITE;
if (access->ac_req_access & ~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 = (__be32 *)verifier->data;
BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id));
}
static __be32
nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_commit *commit = &u->commit;
return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
commit->co_count,
(__be32 *)commit->co_verf.data);
}
static __be32
nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_create *create = &u->create;
struct nfsd_attrs attrs = {
.na_iattr = &create->cr_iattr,
.na_seclabel = &create->cr_label,
};
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_NOP);
if (status)
return status;
status = check_attr_support(rqstp, cstate, create->cr_bmval,
nfsd_attrmask);
if (status)
return status;
status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
current->fs->umask = create->cr_umask;
switch (create->cr_type) {
case NF4LNK:
status = nfsd_symlink(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
create->cr_data, &attrs, &resfh);
break;
case NF4BLK:
status = nfserr_inval;
rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
if (MAJOR(rdev) != create->cr_specdata1 ||
MINOR(rdev) != create->cr_specdata2)
goto out_umask;
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&attrs, S_IFBLK, rdev, &resfh);
break;
case NF4CHR:
status = nfserr_inval;
rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
if (MAJOR(rdev) != create->cr_specdata1 ||
MINOR(rdev) != create->cr_specdata2)
goto out_umask;
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&attrs, S_IFCHR, rdev, &resfh);
break;
case NF4SOCK:
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&attrs, S_IFSOCK, 0, &resfh);
break;
case NF4FIFO:
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
&attrs, 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,
&attrs, S_IFDIR, 0, &resfh);
break;
default:
status = nfserr_badtype;
}
if (status)
goto out;
if (attrs.na_labelerr)
create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
if (attrs.na_aclerr)
create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
set_change_info(&create->cr_cinfo, &cstate->current_fh);
fh_dup2(&cstate->current_fh, &resfh);
out:
fh_put(&resfh);
out_umask:
current->fs->umask = 0;
nfsd_attrs_free(&attrs);
return status;
}
static __be32
nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_getattr *getattr = &u->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_suppattrs[cstate->minorversion][0];
getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
getattr->ga_fhp = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_link *link = &u->link;
__be32 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,
union nfsd4_op_u *u)
{
return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
}
static __be32
nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
return nfsd_lookup(rqstp, &cstate->current_fh,
u->lookup.lo_name, u->lookup.lo_len,
&cstate->current_fh);
}
static __be32
nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_read *read = &u->read;
__be32 status;
read->rd_nf = NULL;
trace_nfsd_read_start(rqstp, &cstate->current_fh,
read->rd_offset, read->rd_length);
read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp));
if (read->rd_offset > (u64)OFFSET_MAX)
read->rd_offset = (u64)OFFSET_MAX;
if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX)
read->rd_length = (u64)OFFSET_MAX - read->rd_offset;
/*
* 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))
__clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
/* check stateid */
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&read->rd_stateid, RD_STATE,
&read->rd_nf, NULL);
if (status) {
dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
goto out;
}
status = nfs_ok;
out:
read->rd_rqstp = rqstp;
read->rd_fhp = &cstate->current_fh;
return status;
}
static void
nfsd4_read_release(union nfsd4_op_u *u)
{
if (u->read.rd_nf)
nfsd_file_put(u->read.rd_nf);
trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
u->read.rd_offset, u->read.rd_length);
}
static __be32
nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_readdir *readdir = &u->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_suppattrs[cstate->minorversion][0];
readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
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,
union nfsd4_op_u *u)
{
u->readlink.rl_rqstp = rqstp;
u->readlink.rl_fhp = &cstate->current_fh;
return nfs_ok;
}
static __be32
nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_remove *remove = &u->remove;
__be32 status;
if (opens_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
remove->rm_name, remove->rm_namelen);
if (!status)
set_change_info(&remove->rm_cinfo, &cstate->current_fh);
return status;
}
static __be32
nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_rename *rename = &u->rename;
__be32 status;
if (opens_in_grace(SVC_NET(rqstp)))
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,
union nfsd4_op_u *u)
{
struct nfsd4_secinfo *secinfo = &u->secinfo;
struct svc_export *exp;
struct dentry *dentry;
__be32 err;
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 (d_really_is_negative(dentry)) {
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,
union nfsd4_op_u *u)
{
__be32 err;
switch (u->secinfo_no_name.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;
}
u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
fh_put(&cstate->current_fh);
return nfs_ok;
}
static void
nfsd4_secinfo_release(union nfsd4_op_u *u)
{
if (u->secinfo.si_exp)
exp_put(u->secinfo.si_exp);
}
static void
nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
{
if (u->secinfo_no_name.sin_exp)
exp_put(u->secinfo_no_name.sin_exp);
}
static __be32
nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_setattr *setattr = &u->setattr;
struct nfsd_attrs attrs = {
.na_iattr = &setattr->sa_iattr,
.na_seclabel = &setattr->sa_label,
};
struct inode *inode;
__be32 status = nfs_ok;
int err;
if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
status = nfs4_preprocess_stateid_op(rqstp, cstate,
&cstate->current_fh, &setattr->sa_stateid,
WR_STATE, NULL, NULL);
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;
inode = cstate->current_fh.fh_dentry->d_inode;
status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
setattr->sa_acl, &attrs);
if (status)
goto out;
status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
0, (time64_t)0);
if (!status)
status = nfserrno(attrs.na_labelerr);
out:
nfsd_attrs_free(&attrs);
fh_drop_write(&cstate->current_fh);
return status;
}
static __be32
nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_write *write = &u->write;
stateid_t *stateid = &write->wr_stateid;
struct nfsd_file *nf = NULL;
__be32 status = nfs_ok;
unsigned long cnt;
int nvecs;
if (write->wr_offset > (u64)OFFSET_MAX ||
write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
return nfserr_fbig;
cnt = write->wr_buflen;
trace_nfsd_write_start(rqstp, &cstate->current_fh,
write->wr_offset, cnt);
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
stateid, WR_STATE, &nf, NULL);
if (status) {
dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
return status;
}
write->wr_how_written = write->wr_stable_how;
nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
write->wr_how_written,
(__be32 *)write->wr_verifier.data);
nfsd_file_put(nf);
write->wr_bytes_written = cnt;
trace_nfsd_write_done(rqstp, &cstate->current_fh,
write->wr_offset, cnt);
return status;
}
static __be32
nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
stateid_t *src_stateid, struct nfsd_file **src,
stateid_t *dst_stateid, struct nfsd_file **dst)
{
__be32 status;
if (!cstate->save_fh.fh_dentry)
return nfserr_nofilehandle;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
src_stateid, RD_STATE, src, NULL);
if (status) {
dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
goto out;
}
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
dst_stateid, WR_STATE, dst, NULL);
if (status) {
dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
goto out_put_src;
}
/* fix up for NFS-specific error code */
if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
!S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
status = nfserr_wrong_type;
goto out_put_dst;
}
out:
return status;
out_put_dst:
nfsd_file_put(*dst);
out_put_src:
nfsd_file_put(*src);
goto out;
}
static __be32
nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_clone *clone = &u->clone;
struct nfsd_file *src, *dst;
__be32 status;
status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
&clone->cl_dst_stateid, &dst);
if (status)
goto out;
status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos,
dst, clone->cl_dst_pos, clone->cl_count,
EX_ISSYNC(cstate->current_fh.fh_export));
nfsd_file_put(dst);
nfsd_file_put(src);
out:
return status;
}
static void nfs4_put_copy(struct nfsd4_copy *copy)
{
if (!refcount_dec_and_test(&copy->refcount))
return;
kfree(copy->cp_src);
kfree(copy);
}
static void nfsd4_stop_copy(struct nfsd4_copy *copy)
{
if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, &copy->cp_flags))
kthread_stop(copy->copy_task);
nfs4_put_copy(copy);
}
static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
{
struct nfsd4_copy *copy = NULL;
spin_lock(&clp->async_lock);
if (!list_empty(&clp->async_copies)) {
copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
copies);
refcount_inc(&copy->refcount);
}
spin_unlock(&clp->async_lock);
return copy;
}
void nfsd4_shutdown_copy(struct nfs4_client *clp)
{
struct nfsd4_copy *copy;
while ((copy = nfsd4_get_copy(clp)) != NULL)
nfsd4_stop_copy(copy);
}
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
struct nfs_fh *src_fh,
nfs4_stateid *stateid);
extern void nfs42_ssc_close(struct file *filep);
extern void nfs_sb_deactive(struct super_block *sb);
#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
/*
* setup a work entry in the ssc delayed unmount list.
*/
static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
struct nfsd4_ssc_umount_item **retwork, struct vfsmount **ss_mnt)
{
struct nfsd4_ssc_umount_item *ni = NULL;
struct nfsd4_ssc_umount_item *work = NULL;
struct nfsd4_ssc_umount_item *tmp;
DEFINE_WAIT(wait);
*ss_mnt = NULL;
*retwork = NULL;
work = kzalloc(sizeof(*work), GFP_KERNEL);
try_again:
spin_lock(&nn->nfsd_ssc_lock);
list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
continue;
/* found a match */
if (ni->nsui_busy) {
/* wait - and try again */
prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
TASK_INTERRUPTIBLE);
spin_unlock(&nn->nfsd_ssc_lock);
/* allow 20secs for mount/unmount for now - revisit */
if (signal_pending(current) ||
(schedule_timeout(20*HZ) == 0)) {
kfree(work);
return nfserr_eagain;
}
finish_wait(&nn->nfsd_ssc_waitq, &wait);
goto try_again;
}
*ss_mnt = ni->nsui_vfsmount;
refcount_inc(&ni->nsui_refcnt);
spin_unlock(&nn->nfsd_ssc_lock);
kfree(work);
/* return vfsmount in ss_mnt */
return 0;
}
if (work) {
strlcpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
refcount_set(&work->nsui_refcnt, 2);
work->nsui_busy = true;
list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
*retwork = work;
}
spin_unlock(&nn->nfsd_ssc_lock);
return 0;
}
static void nfsd4_ssc_update_dul_work(struct nfsd_net *nn,
struct nfsd4_ssc_umount_item *work, struct vfsmount *ss_mnt)
{
/* set nsui_vfsmount, clear busy flag and wakeup waiters */
spin_lock(&nn->nfsd_ssc_lock);
work->nsui_vfsmount = ss_mnt;
work->nsui_busy = false;
wake_up_all(&nn->nfsd_ssc_waitq);
spin_unlock(&nn->nfsd_ssc_lock);
}
static void nfsd4_ssc_cancel_dul_work(struct nfsd_net *nn,
struct nfsd4_ssc_umount_item *work)
{
spin_lock(&nn->nfsd_ssc_lock);
list_del(&work->nsui_list);
wake_up_all(&nn->nfsd_ssc_waitq);
spin_unlock(&nn->nfsd_ssc_lock);
kfree(work);
}
/*
* Support one copy source server for now.
*/
static __be32
nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
struct vfsmount **mount)
{
struct file_system_type *type;
struct vfsmount *ss_mnt;
struct nfs42_netaddr *naddr;
struct sockaddr_storage tmp_addr;
size_t tmp_addrlen, match_netid_len = 3;
char *startsep = "", *endsep = "", *match_netid = "tcp";
char *ipaddr, *dev_name, *raw_data;
int len, raw_len;
__be32 status = nfserr_inval;
struct nfsd4_ssc_umount_item *work = NULL;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
naddr = &nss->u.nl4_addr;
tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
naddr->addr_len,
(struct sockaddr *)&tmp_addr,
sizeof(tmp_addr));
if (tmp_addrlen == 0)
goto out_err;
if (tmp_addr.ss_family == AF_INET6) {
startsep = "[";
endsep = "]";
match_netid = "tcp6";
match_netid_len = 4;
}
if (naddr->netid_len != match_netid_len ||
strncmp(naddr->netid, match_netid, naddr->netid_len))
goto out_err;
/* Construct the raw data for the vfs_kern_mount call */
len = RPC_MAX_ADDRBUFLEN + 1;
ipaddr = kzalloc(len, GFP_KERNEL);
if (!ipaddr)
goto out_err;
rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
/* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
raw_data = kzalloc(raw_len, GFP_KERNEL);
if (!raw_data)
goto out_free_ipaddr;
snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
status = nfserr_nodev;
type = get_fs_type("nfs");
if (!type)
goto out_free_rawdata;
/* Set the server:<export> for the vfs_kern_mount call */
dev_name = kzalloc(len + 5, GFP_KERNEL);
if (!dev_name)
goto out_free_rawdata;
snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
status = nfsd4_ssc_setup_dul(nn, ipaddr, &work, &ss_mnt);
if (status)
goto out_free_devname;
if (ss_mnt)
goto out_done;
/* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
module_put(type->owner);
if (IS_ERR(ss_mnt)) {
status = nfserr_nodev;
if (work)
nfsd4_ssc_cancel_dul_work(nn, work);
goto out_free_devname;
}
if (work)
nfsd4_ssc_update_dul_work(nn, work, ss_mnt);
out_done:
status = 0;
*mount = ss_mnt;
out_free_devname:
kfree(dev_name);
out_free_rawdata:
kfree(raw_data);
out_free_ipaddr:
kfree(ipaddr);
out_err:
return status;
}
static void
nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
{
nfs_do_sb_deactive(ss_mnt->mnt_sb);
mntput(ss_mnt);
}
/*
* Verify COPY destination stateid.
*
* Connect to the source server with NFSv4.1.
* Create the source struct file for nfsd_copy_range.
* Called with COPY cstate:
* SAVED_FH: source filehandle
* CURRENT_FH: destination filehandle
*/
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy, struct vfsmount **mount)
{
struct svc_fh *s_fh = NULL;
stateid_t *s_stid = &copy->cp_src_stateid;
__be32 status = nfserr_inval;
/* Verify the destination stateid and set dst struct file*/
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&copy->cp_dst_stateid,
WR_STATE, &copy->nf_dst, NULL);
if (status)
goto out;
status = nfsd4_interssc_connect(copy->cp_src, rqstp, mount);
if (status)
goto out;
s_fh = &cstate->save_fh;
copy->c_fh.size = s_fh->fh_handle.fh_size;
memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
sizeof(stateid_opaque_t));
status = 0;
out:
return status;
}
static void
nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *filp,
struct nfsd_file *dst)
{
bool found = false;
long timeout;
struct nfsd4_ssc_umount_item *tmp;
struct nfsd4_ssc_umount_item *ni = NULL;
struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
nfs42_ssc_close(filp);
nfsd_file_put(dst);
fput(filp);
if (!nn) {
mntput(ss_mnt);
return;
}
spin_lock(&nn->nfsd_ssc_lock);
timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
if (ni->nsui_vfsmount->mnt_sb == ss_mnt->mnt_sb) {
list_del(&ni->nsui_list);
/*
* vfsmount can be shared by multiple exports,
* decrement refcnt. If the count drops to 1 it
* will be unmounted when nsui_expire expires.
*/
refcount_dec(&ni->nsui_refcnt);
ni->nsui_expire = jiffies + timeout;
list_add_tail(&ni->nsui_list, &nn->nfsd_ssc_mount_list);
found = true;
break;
}
}
spin_unlock(&nn->nfsd_ssc_lock);
if (!found) {
mntput(ss_mnt);
return;
}
}
#else /* CONFIG_NFSD_V4_2_INTER_SSC */
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy,
struct vfsmount **mount)
{
*mount = NULL;
return nfserr_inval;
}
static void
nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *filp,
struct nfsd_file *dst)
{
}
static void
nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
{
}
static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
struct nfs_fh *src_fh,
nfs4_stateid *stateid)
{
return NULL;
}
#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
static __be32
nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy)
{
return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
&copy->nf_src, &copy->cp_dst_stateid,
&copy->nf_dst);
}
static void
nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
{
nfsd_file_put(src);
nfsd_file_put(dst);
}
static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
{
struct nfsd4_cb_offload *cbo =
container_of(cb, struct nfsd4_cb_offload, co_cb);
kfree(cbo);
}
static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
struct rpc_task *task)
{
return 1;
}
static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
.release = nfsd4_cb_offload_release,
.done = nfsd4_cb_offload_done
};
static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
{
copy->cp_res.wr_stable_how =
test_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags) ?
NFS_FILE_SYNC : NFS_UNSTABLE;
nfsd4_copy_set_sync(copy, sync);
gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
}
static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
struct file *dst,
struct file *src)
{
errseq_t since;
ssize_t bytes_copied = 0;
u64 bytes_total = copy->cp_count;
u64 src_pos = copy->cp_src_pos;
u64 dst_pos = copy->cp_dst_pos;
int status;
/* See RFC 7862 p.67: */
if (bytes_total == 0)
bytes_total = ULLONG_MAX;
do {
if (kthread_should_stop())
break;
bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos,
bytes_total);
if (bytes_copied <= 0)
break;
bytes_total -= bytes_copied;
copy->cp_res.wr_bytes_written += bytes_copied;
src_pos += bytes_copied;
dst_pos += bytes_copied;
} while (bytes_total > 0 && nfsd4_copy_is_async(copy));
/* for a non-zero asynchronous copy do a commit of data */
if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
since = READ_ONCE(dst->f_wb_err);
status = vfs_fsync_range(dst, copy->cp_dst_pos,
copy->cp_res.wr_bytes_written, 0);
if (!status)
status = filemap_check_wb_err(dst->f_mapping, since);
if (!status)
set_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags);
}
return bytes_copied;
}
static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
struct file *src, struct file *dst,
bool sync)
{
__be32 status;
ssize_t bytes;
bytes = _nfsd_copy_file_range(copy, dst, src);
/* for async copy, we ignore the error, client can always retry
* to get the error
*/
if (bytes < 0 && !copy->cp_res.wr_bytes_written)
status = nfserrno(bytes);
else {
nfsd4_init_copy_res(copy, sync);
status = nfs_ok;
}
return status;
}
static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
{
dst->cp_src_pos = src->cp_src_pos;
dst->cp_dst_pos = src->cp_dst_pos;
dst->cp_count = src->cp_count;
dst->cp_flags = src->cp_flags;
memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
memcpy(&dst->fh, &src->fh, sizeof(src->fh));
dst->cp_clp = src->cp_clp;
dst->nf_dst = nfsd_file_get(src->nf_dst);
/* for inter, nf_src doesn't exist yet */
if (!nfsd4_ssc_is_inter(src))
dst->nf_src = nfsd_file_get(src->nf_src);
memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
dst->ss_mnt = src->ss_mnt;
}
static void cleanup_async_copy(struct nfsd4_copy *copy)
{
nfs4_free_copy_state(copy);
nfsd_file_put(copy->nf_dst);
if (!nfsd4_ssc_is_inter(copy))
nfsd_file_put(copy->nf_src);
spin_lock(&copy->cp_clp->async_lock);
list_del(&copy->copies);
spin_unlock(&copy->cp_clp->async_lock);
nfs4_put_copy(copy);
}
static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr)
{
struct nfsd4_cb_offload *cbo;
cbo = kzalloc(sizeof(*cbo), GFP_KERNEL);
if (!cbo)
return;
memcpy(&cbo->co_res, &copy->cp_res, sizeof(copy->cp_res));
memcpy(&cbo->co_fh, &copy->fh, sizeof(copy->fh));
cbo->co_nfserr = nfserr;
nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops,
NFSPROC4_CLNT_CB_OFFLOAD);
trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid,
&cbo->co_fh, copy->cp_count, nfserr);
nfsd4_run_cb(&cbo->co_cb);
}
/**
* nfsd4_do_async_copy - kthread function for background server-side COPY
* @data: arguments for COPY operation
*
* Return values:
* %0: Copy operation is done.
*/
static int nfsd4_do_async_copy(void *data)
{
struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
__be32 nfserr;
if (nfsd4_ssc_is_inter(copy)) {
struct file *filp;
filp = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
&copy->stateid);
if (IS_ERR(filp)) {
nfserr = nfserr_offload_denied;
nfsd4_interssc_disconnect(copy->ss_mnt);
goto do_callback;
}
nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
false);
nfsd4_cleanup_inter_ssc(copy->ss_mnt, filp, copy->nf_dst);
} else {
nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
copy->nf_dst->nf_file, false);
nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
}
do_callback:
nfsd4_send_cb_offload(copy, nfserr);
cleanup_async_copy(copy);
return 0;
}
static __be32
nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_copy *copy = &u->copy;
__be32 status;
struct nfsd4_copy *async_copy = NULL;
if (nfsd4_ssc_is_inter(copy)) {
if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
status = nfserr_notsupp;
goto out;
}
status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
&copy->ss_mnt);
if (status)
return nfserr_offload_denied;
} else {
status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
if (status)
return status;
}
copy->cp_clp = cstate->clp;
memcpy(&copy->fh, &cstate->current_fh.fh_handle,
sizeof(struct knfsd_fh));
if (nfsd4_copy_is_async(copy)) {
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
status = nfserrno(-ENOMEM);
async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
if (!async_copy)
goto out_err;
async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
if (!async_copy->cp_src)
goto out_err;
if (!nfs4_init_copy_state(nn, copy))
goto out_err;
refcount_set(&async_copy->refcount, 1);
memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.stid,
sizeof(copy->cp_res.cb_stateid));
dup_copy_fields(copy, async_copy);
async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
async_copy, "%s", "copy thread");
if (IS_ERR(async_copy->copy_task))
goto out_err;
spin_lock(&async_copy->cp_clp->async_lock);
list_add(&async_copy->copies,
&async_copy->cp_clp->async_copies);
spin_unlock(&async_copy->cp_clp->async_lock);
wake_up_process(async_copy->copy_task);
status = nfs_ok;
} else {
status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
copy->nf_dst->nf_file, true);
nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
}
out:
return status;
out_err:
if (async_copy)
cleanup_async_copy(async_copy);
status = nfserrno(-ENOMEM);
if (nfsd4_ssc_is_inter(copy))
nfsd4_interssc_disconnect(copy->ss_mnt);
goto out;
}
struct nfsd4_copy *
find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
{
struct nfsd4_copy *copy;
spin_lock(&clp->async_lock);
list_for_each_entry(copy, &clp->async_copies, copies) {
if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
continue;
refcount_inc(&copy->refcount);
spin_unlock(&clp->async_lock);
return copy;
}
spin_unlock(&clp->async_lock);
return NULL;
}
static __be32
nfsd4_offload_cancel(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_offload_status *os = &u->offload_status;
struct nfsd4_copy *copy;
struct nfs4_client *clp = cstate->clp;
copy = find_async_copy(clp, &os->stateid);
if (!copy) {
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
return manage_cpntf_state(nn, &os->stateid, clp, NULL);
} else
nfsd4_stop_copy(copy);
return nfs_ok;
}
static __be32
nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_copy_notify *cn = &u->copy_notify;
__be32 status;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct nfs4_stid *stid;
struct nfs4_cpntf_state *cps;
struct nfs4_client *clp = cstate->clp;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&cn->cpn_src_stateid, RD_STATE, NULL,
&stid);
if (status)
return status;
cn->cpn_sec = nn->nfsd4_lease;
cn->cpn_nsec = 0;
status = nfserrno(-ENOMEM);
cps = nfs4_alloc_init_cpntf_state(nn, stid);
if (!cps)
goto out;
memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
/* For now, only return one server address in cpn_src, the
* address used by the client to connect to this server.
*/
cn->cpn_src->nl4_type = NL4_NETADDR;
status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
&cn->cpn_src->u.nl4_addr);
WARN_ON_ONCE(status);
if (status) {
nfs4_put_cpntf_state(nn, cps);
goto out;
}
out:
nfs4_put_stid(stid);
return status;
}
static __be32
nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate, int flags)
{
__be32 status;
struct nfsd_file *nf;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&fallocate->falloc_stateid,
WR_STATE, &nf, NULL);
if (status != nfs_ok) {
dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
return status;
}
status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
fallocate->falloc_offset,
fallocate->falloc_length,
flags);
nfsd_file_put(nf);
return status;
}
static __be32
nfsd4_offload_status(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_offload_status *os = &u->offload_status;
__be32 status = 0;
struct nfsd4_copy *copy;
struct nfs4_client *clp = cstate->clp;
copy = find_async_copy(clp, &os->stateid);
if (copy) {
os->count = copy->cp_res.wr_bytes_written;
nfs4_put_copy(copy);
} else
status = nfserr_bad_stateid;
return status;
}
static __be32
nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
}
static __be32
nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
}
static __be32
nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_seek *seek = &u->seek;
int whence;
__be32 status;
struct nfsd_file *nf;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&seek->seek_stateid,
RD_STATE, &nf, NULL);
if (status) {
dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
return status;
}
switch (seek->seek_whence) {
case NFS4_CONTENT_DATA:
whence = SEEK_DATA;
break;
case NFS4_CONTENT_HOLE:
whence = SEEK_HOLE;
break;
default:
status = nfserr_union_notsupp;
goto out;
}
/*
* Note: This call does change file->f_pos, but nothing in NFSD
* should ever file->f_pos.
*/
seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
if (seek->seek_pos < 0)
status = nfserrno(seek->seek_pos);
else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
seek->seek_eof = true;
out:
nfsd_file_put(nf);
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_to_buf(&p, count, &cstate->current_fh,
cstate->current_fh.fh_export,
cstate->current_fh.fh_dentry,
verify->ve_bmval,
rqstp, 0);
/*
* If nfsd4_encode_fattr() ran out of space, assume that's because
* the attributes are longer (hence different) than those given:
*/
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,
union nfsd4_op_u *u)
{
__be32 status;
status = _nfsd4_verify(rqstp, cstate, &u->verify);
return status == nfserr_not_same ? nfs_ok : status;
}
static __be32
nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
__be32 status;
status = _nfsd4_verify(rqstp, cstate, &u->nverify);
return status == nfserr_same ? nfs_ok : status;
}
#ifdef CONFIG_NFSD_PNFS
static const struct nfsd4_layout_ops *
nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
{
if (!exp->ex_layout_types) {
dprintk("%s: export does not support pNFS\n", __func__);
return NULL;
}
if (layout_type >= LAYOUT_TYPE_MAX ||
!(exp->ex_layout_types & (1 << layout_type))) {
dprintk("%s: layout type %d not supported\n",
__func__, layout_type);
return NULL;
}
return nfsd4_layout_ops[layout_type];
}
static __be32
nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
{
struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
const struct nfsd4_layout_ops *ops;
struct nfsd4_deviceid_map *map;
struct svc_export *exp;
__be32 nfserr;
dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
__func__,
gdp->gd_layout_type,
gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
gdp->gd_maxcount);
map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
if (!map) {
dprintk("%s: couldn't find device ID to export mapping!\n",
__func__);
return nfserr_noent;
}
exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
if (IS_ERR(exp)) {
dprintk("%s: could not find device id\n", __func__);
return nfserr_noent;
}
nfserr = nfserr_layoutunavailable;
ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
if (!ops)
goto out;
nfserr = nfs_ok;
if (gdp->gd_maxcount != 0) {
nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
rqstp, cstate->clp, gdp);
}
gdp->gd_notify_types &= ops->notify_types;
out:
exp_put(exp);
return nfserr;
}
static void
nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
{
kfree(u->getdeviceinfo.gd_device);
}
static __be32
nfsd4_layoutget(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
{
struct nfsd4_layoutget *lgp = &u->layoutget;
struct svc_fh *current_fh = &cstate->current_fh;
const struct nfsd4_layout_ops *ops;
struct nfs4_layout_stateid *ls;
__be32 nfserr;
int accmode = NFSD_MAY_READ_IF_EXEC;
switch (lgp->lg_seg.iomode) {
case IOMODE_READ:
accmode |= NFSD_MAY_READ;
break;
case IOMODE_RW:
accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
break;
default:
dprintk("%s: invalid iomode %d\n",
__func__, lgp->lg_seg.iomode);
nfserr = nfserr_badiomode;
goto out;
}
nfserr = fh_verify(rqstp, current_fh, 0, accmode);
if (nfserr)
goto out;
nfserr = nfserr_layoutunavailable;
ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
if (!ops)
goto out;
/*
* Verify minlength and range as per RFC5661:
* o If loga_length is less than loga_minlength,
* the metadata server MUST return NFS4ERR_INVAL.
* o If the sum of loga_offset and loga_minlength exceeds
* NFS4_UINT64_MAX, and loga_minlength is not
* NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
* o If the sum of loga_offset and loga_length exceeds
* NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
* the error NFS4ERR_INVAL MUST result.
*/
nfserr = nfserr_inval;
if (lgp->lg_seg.length < lgp->lg_minlength ||
(lgp->lg_minlength != NFS4_MAX_UINT64 &&
lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
(lgp->lg_seg.length != NFS4_MAX_UINT64 &&
lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
goto out;
if (lgp->lg_seg.length == 0)
goto out;
nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
true, lgp->lg_layout_type, &ls);
if (nfserr) {
trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
goto out;
}
nfserr = nfserr_recallconflict;
if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
goto out_put_stid;
nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
current_fh, lgp);
if (nfserr)
goto out_put_stid;
nfserr = nfsd4_insert_layout(lgp, ls);
out_put_stid:
mutex_unlock(&ls->ls_mutex);
nfs4_put_stid(&ls->ls_stid);
out:
return nfserr;
}
static void
nfsd4_layoutget_release(union nfsd4_op_u *u)
{
kfree(u->layoutget.lg_content);
}
static __be32
nfsd4_layoutcommit(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
{
struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
struct svc_fh *current_fh = &cstate->current_fh;
const struct nfsd4_layout_ops *ops;
loff_t new_size = lcp->lc_last_wr + 1;
struct inode *inode;
struct nfs4_layout_stateid *ls;
__be32 nfserr;
nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
if (nfserr)
goto out;
nfserr = nfserr_layoutunavailable;
ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
if (!ops)
goto out;
inode = d_inode(current_fh->fh_dentry);
nfserr = nfserr_inval;
if (new_size <= seg->offset) {
dprintk("pnfsd: last write before layout segment\n");
goto out;
}
if (new_size > seg->offset + seg->length) {
dprintk("pnfsd: last write beyond layout segment\n");
goto out;
}
if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
dprintk("pnfsd: layoutcommit beyond EOF\n");
goto out;
}
nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
false, lcp->lc_layout_type,
&ls);
if (nfserr) {
trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
/* fixup error code as per RFC5661 */
if (nfserr == nfserr_bad_stateid)
nfserr = nfserr_badlayout;
goto out;
}
/* LAYOUTCOMMIT does not require any serialization */
mutex_unlock(&ls->ls_mutex);
if (new_size > i_size_read(inode)) {
lcp->lc_size_chg = 1;
lcp->lc_newsize = new_size;
} else {
lcp->lc_size_chg = 0;
}
nfserr = ops->proc_layoutcommit(inode, lcp);
nfs4_put_stid(&ls->ls_stid);
out:
return nfserr;
}
static __be32
nfsd4_layoutreturn(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
{
struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
struct svc_fh *current_fh = &cstate->current_fh;
__be32 nfserr;
nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
if (nfserr)
goto out;
nfserr = nfserr_layoutunavailable;
if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
goto out;
switch (lrp->lr_seg.iomode) {
case IOMODE_READ:
case IOMODE_RW:
case IOMODE_ANY:
break;
default:
dprintk("%s: invalid iomode %d\n", __func__,
lrp->lr_seg.iomode);
nfserr = nfserr_inval;
goto out;
}
switch (lrp->lr_return_type) {
case RETURN_FILE:
nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
break;
case RETURN_FSID:
case RETURN_ALL:
nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
break;
default:
dprintk("%s: invalid return_type %d\n", __func__,
lrp->lr_return_type);
nfserr = nfserr_inval;
break;
}
out:
return nfserr;
}
#endif /* CONFIG_NFSD_PNFS */
static __be32
nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_getxattr *getxattr = &u->getxattr;
return nfsd_getxattr(rqstp, &cstate->current_fh,
getxattr->getxa_name, &getxattr->getxa_buf,
&getxattr->getxa_len);
}
static __be32
nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_setxattr *setxattr = &u->setxattr;
__be32 ret;
if (opens_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
setxattr->setxa_buf, setxattr->setxa_len,
setxattr->setxa_flags);
if (!ret)
set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
return ret;
}
static __be32
nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
/*
* Get the entire list, then copy out only the user attributes
* in the encode function.
*/
return nfsd_listxattr(rqstp, &cstate->current_fh,
&u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
}
static __be32
nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_removexattr *removexattr = &u->removexattr;
__be32 ret;
if (opens_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
ret = nfsd_removexattr(rqstp, &cstate->current_fh,
removexattr->rmxa_name);
if (!ret)
set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
return ret;
}
/*
* NULL call.
*/
static __be32
nfsd4_proc_null(struct svc_rqst *rqstp)
{
return rpc_success;
}
static inline void nfsd4_increment_op_stats(u32 opnum)
{
if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
}
static const struct nfsd4_operation nfsd4_ops[];
static const char *nfsd4_op_name(unsigned opnum);
/*
* 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 *first_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 (first_op->status == nfserr_op_illegal)
return nfs_ok;
if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
return nfserr_op_not_in_session;
if (first_op->opnum == OP_SEQUENCE)
return nfs_ok;
/*
* So first_op is something allowed outside a session, like
* EXCHANGE_ID; but then it has to be the only op in the
* compound:
*/
if (args->opcnt != 1)
return nfserr_not_only_op;
return nfs_ok;
}
const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
{
return &nfsd4_ops[op->opnum];
}
bool nfsd4_cache_this_op(struct nfsd4_op *op)
{
if (op->opnum == OP_ILLEGAL)
return false;
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];
const struct nfsd4_operation *thisd = OPDESC(this);
const struct nfsd4_operation *nextd;
/*
* 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;
if (next->opnum == OP_ILLEGAL)
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);
}
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
static void
check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
{
struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
struct nfsd4_copy *copy;
struct nfsd4_putfh *putfh;
int i;
/* traverse all operation and if it's a COPY compound, mark the
* source filehandle to skip verification
*/
for (i = 0; i < args->opcnt; i++) {
op = &args->ops[i];
if (op->opnum == OP_PUTFH)
current_op = op;
else if (op->opnum == OP_SAVEFH)
saved_op = current_op;
else if (op->opnum == OP_RESTOREFH)
current_op = saved_op;
else if (op->opnum == OP_COPY) {
copy = (struct nfsd4_copy *)&op->u;
if (!saved_op) {
op->status = nfserr_nofilehandle;
return;
}
putfh = (struct nfsd4_putfh *)&saved_op->u;
if (nfsd4_ssc_is_inter(copy))
putfh->no_verify = true;
}
}
}
#else
static void
check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
{
}
#endif
/*
* COMPOUND call.
*/
static __be32
nfsd4_proc_compound(struct svc_rqst *rqstp)
{
struct nfsd4_compoundargs *args = rqstp->rq_argp;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfsd4_op *op;
struct nfsd4_compound_state *cstate = &resp->cstate;
struct svc_fh *current_fh = &cstate->current_fh;
struct svc_fh *save_fh = &cstate->save_fh;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
__be32 status;
resp->xdr = &rqstp->rq_res_stream;
resp->statusp = resp->xdr->p;
/* reserve space for: NFS status code */
xdr_reserve_space(resp->xdr, XDR_UNIT);
/* reserve space for: taglen, tag, and opcnt */
xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
resp->taglen = args->taglen;
resp->tag = args->tag;
resp->rqstp = rqstp;
cstate->minorversion = args->minorversion;
fh_init(current_fh, NFS4_FHSIZE);
fh_init(save_fh, NFS4_FHSIZE);
/*
* Don't use the deferral mechanism for NFSv4; compounds make it
* too hard to avoid non-idempotency problems.
*/
__clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
/*
* According to RFC3010, this takes precedence over all other errors.
*/
status = nfserr_minor_vers_mismatch;
if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
goto out;
status = nfserr_resource;
if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
goto out;
status = nfs41_check_op_ordering(args);
if (status) {
op = &args->ops[0];
op->status = status;
resp->opcnt = 1;
goto encode_op;
}
check_if_stalefh_allowed(args);
rqstp->rq_lease_breaker = (void **)&cstate->clp;
trace_nfsd_compound(rqstp, args->opcnt);
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
/*
* The XDR decode routines may have pre-set op->status;
* for example, if there is a miscellaneous XDR error
* it will be set to nfserr_bad_xdr.
*/
if (op->status) {
if (op->opnum == OP_OPEN)
op->status = nfsd4_open_omfg(rqstp, cstate, op);
goto encode_op;
}
if (!current_fh->fh_dentry &&
!HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
op->status = nfserr_nofilehandle;
goto encode_op;
}
} else if (current_fh->fh_export &&
current_fh->fh_export->ex_fslocs.migrated &&
!(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
op->status = nfserr_moved;
goto encode_op;
}
fh_clear_pre_post_attrs(current_fh);
/* If op is non-idempotent */
if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
/*
* Don't execute this op if we couldn't encode a
* successful reply:
*/
u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
/*
* Plus if there's another operation, make sure
* we'll have space to at least encode an error:
*/
if (resp->opcnt < args->opcnt)
plen += COMPOUND_ERR_SLACK_SPACE;
op->status = nfsd4_check_resp_size(resp, plen);
}
if (op->status)
goto encode_op;
if (op->opdesc->op_get_currentstateid)
op->opdesc->op_get_currentstateid(cstate, &op->u);
op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
/* Only from SEQUENCE */
if (cstate->status == nfserr_replay_cache) {
dprintk("%s NFS4.1 replay from cache\n", __func__);
status = op->status;
goto out;
}
if (!op->status) {
if (op->opdesc->op_set_currentstateid)
op->opdesc->op_set_currentstateid(cstate, &op->u);
if (op->opdesc->op_flags & OP_CLEAR_STATEID)
clear_current_stateid(cstate);
if (current_fh->fh_export &&
need_wrongsec_check(rqstp))
op->status = check_nfsd_access(current_fh->fh_export, rqstp);
}
encode_op:
if (op->status == nfserr_replay_me) {
op->replay = &cstate->replay_owner->so_replay;
nfsd4_encode_replay(resp->xdr, op);
status = op->status = op->replay->rp_status;
} else {
nfsd4_encode_operation(resp, op);
status = op->status;
}
trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
nfsd4_op_name(op->opnum));
nfsd4_cstate_clear_replay(cstate);
nfsd4_increment_op_stats(op->opnum);
}
fh_put(current_fh);
fh_put(save_fh);
BUG_ON(cstate->replay_owner);
out:
cstate->status = status;
/* Reset deferral mechanism for RPC deferrals */
__set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
return rpc_success;
}
#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)
/* We'll fall back on returning no lockowner if run out of space: */
#define op_encode_lockowner_maxsz (0)
#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_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
/* ac_supported, ac_resp_access */
return (op_encode_hdr_size + 2)* 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);
}
/*
* Note since this is an idempotent operation we won't insist on failing
* the op prematurely if the estimate is too large. We may turn off splice
* reads unnecessarily.
*/
static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
u32 *bmap = op->u.getattr.ga_bmval;
u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
u32 ret = 0;
if (bmap0 & FATTR4_WORD0_ACL)
return svc_max_payload(rqstp);
if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
return svc_max_payload(rqstp);
if (bmap1 & FATTR4_WORD1_OWNER) {
ret += IDMAP_NAMESZ + 4;
bmap1 &= ~FATTR4_WORD1_OWNER;
}
if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
ret += IDMAP_NAMESZ + 4;
bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
}
if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
ret += NFS4_FHSIZE + 4;
bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
}
if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
ret += NFS4_MAXLABELLEN + 12;
bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
}
/*
* Largest of remaining attributes are 16 bytes (e.g.,
* supported_attributes)
*/
ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
/* bitmask, length */
ret += 20;
return ret;
}
static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
}
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 = min(op->u.read.rd_length, maxcount);
return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 maxcount = svc_max_payload(rqstp);
u32 rlen = min(op->u.read.rd_length, maxcount);
/*
* If we detect that the file changed during hole encoding, then we
* recover by encoding the remaining reply as data. This means we need
* to set aside enough room to encode two data segments.
*/
u32 seg_len = 2 * (1 + 2 + 1);
return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 maxcount = 0, rlen = 0;
maxcount = svc_max_payload(rqstp);
rlen = min(op->u.readdir.rd_maxcount, maxcount);
return (op_encode_hdr_size + op_encode_verifier_maxsz +
XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
}
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_sequence_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
return (op_encode_hdr_size
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
}
static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
* 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_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
(4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
}
static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
sizeof(__be32);
}
static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + 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 + /* eir_flags, spr_how */\
4 + /* spo_must_enforce & _allow with bitmap */\
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 inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* wr_callback */ +
op_encode_stateid_maxsz /* wr_callback */ +
2 /* wr_count */ +
1 /* wr_committed */ +
op_encode_verifier_maxsz +
1 /* cr_consecutive */ +
1 /* cr_synchronous */) * sizeof(__be32);
}
static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
return (op_encode_hdr_size +
2 /* osr_count */ +
1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
}
static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
return (op_encode_hdr_size +
3 /* cnr_lease_time */ +
1 /* We support one cnr_source_server */ +
1 /* cnr_stateid seq */ +
op_encode_stateid_maxsz /* cnr_stateid */ +
1 /* num cnr_source_server*/ +
1 /* nl4_type */ +
1 /* nl4 size */ +
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
* sizeof(__be32);
}
#ifdef CONFIG_NFSD_PNFS
static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 maxcount = 0, rlen = 0;
maxcount = svc_max_payload(rqstp);
rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
return (op_encode_hdr_size +
1 /* gd_layout_type*/ +
XDR_QUADLEN(rlen) +
2 /* gd_notify_types */) * sizeof(__be32);
}
/*
* At this stage we don't really know what layout driver will handle the request,
* so we need to define an arbitrary upper bound here.
*/
#define MAX_LAYOUT_SIZE 128
static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* logr_return_on_close */ +
op_encode_stateid_maxsz +
1 /* nr of layouts */ +
MAX_LAYOUT_SIZE) * sizeof(__be32);
}
static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* locr_newsize */ +
2 /* ns_size */) * sizeof(__be32);
}
static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* lrs_stateid */ +
op_encode_stateid_maxsz) * sizeof(__be32);
}
#endif /* CONFIG_NFSD_PNFS */
static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
return (op_encode_hdr_size + 3) * sizeof(__be32);
}
static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
u32 maxcount, rlen;
maxcount = svc_max_payload(rqstp);
rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_setxattr_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_listxattrs_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
u32 maxcount, rlen;
maxcount = svc_max_payload(rqstp);
rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static const struct nfsd4_operation nfsd4_ops[] = {
[OP_ACCESS] = {
.op_func = nfsd4_access,
.op_name = "OP_ACCESS",
.op_rsize_bop = nfsd4_access_rsize,
},
[OP_CLOSE] = {
.op_func = nfsd4_close,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_CLOSE",
.op_rsize_bop = nfsd4_status_stateid_rsize,
.op_get_currentstateid = nfsd4_get_closestateid,
.op_set_currentstateid = nfsd4_set_closestateid,
},
[OP_COMMIT] = {
.op_func = nfsd4_commit,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_COMMIT",
.op_rsize_bop = nfsd4_commit_rsize,
},
[OP_CREATE] = {
.op_func = nfsd4_create,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
.op_name = "OP_CREATE",
.op_rsize_bop = nfsd4_create_rsize,
},
[OP_DELEGRETURN] = {
.op_func = nfsd4_delegreturn,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_DELEGRETURN",
.op_rsize_bop = nfsd4_only_status_rsize,
.op_get_currentstateid = nfsd4_get_delegreturnstateid,
},
[OP_GETATTR] = {
.op_func = nfsd4_getattr,
.op_flags = ALLOWED_ON_ABSENT_FS,
.op_rsize_bop = nfsd4_getattr_rsize,
.op_name = "OP_GETATTR",
},
[OP_GETFH] = {
.op_func = nfsd4_getfh,
.op_name = "OP_GETFH",
.op_rsize_bop = nfsd4_getfh_rsize,
},
[OP_LINK] = {
.op_func = nfsd4_link,
.op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
| OP_CACHEME,
.op_name = "OP_LINK",
.op_rsize_bop = nfsd4_link_rsize,
},
[OP_LOCK] = {
.op_func = nfsd4_lock,
.op_flags = OP_MODIFIES_SOMETHING |
OP_NONTRIVIAL_ERROR_ENCODE,
.op_name = "OP_LOCK",
.op_rsize_bop = nfsd4_lock_rsize,
.op_set_currentstateid = nfsd4_set_lockstateid,
},
[OP_LOCKT] = {
.op_func = nfsd4_lockt,
.op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
.op_name = "OP_LOCKT",
.op_rsize_bop = nfsd4_lock_rsize,
},
[OP_LOCKU] = {
.op_func = nfsd4_locku,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LOCKU",
.op_rsize_bop = nfsd4_status_stateid_rsize,
.op_get_currentstateid = nfsd4_get_lockustateid,
},
[OP_LOOKUP] = {
.op_func = nfsd4_lookup,
.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
.op_name = "OP_LOOKUP",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_LOOKUPP] = {
.op_func = nfsd4_lookupp,
.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
.op_name = "OP_LOOKUPP",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_NVERIFY] = {
.op_func = nfsd4_nverify,
.op_name = "OP_NVERIFY",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_OPEN] = {
.op_func = nfsd4_open,
.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN",
.op_rsize_bop = nfsd4_open_rsize,
.op_set_currentstateid = nfsd4_set_openstateid,
},
[OP_OPEN_CONFIRM] = {
.op_func = nfsd4_open_confirm,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN_CONFIRM",
.op_rsize_bop = nfsd4_status_stateid_rsize,
},
[OP_OPEN_DOWNGRADE] = {
.op_func = nfsd4_open_downgrade,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_OPEN_DOWNGRADE",
.op_rsize_bop = nfsd4_status_stateid_rsize,
.op_get_currentstateid = nfsd4_get_opendowngradestateid,
.op_set_currentstateid = nfsd4_set_opendowngradestateid,
},
[OP_PUTFH] = {
.op_func = nfsd4_putfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
.op_name = "OP_PUTFH",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_PUTPUBFH] = {
.op_func = nfsd4_putrootfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
.op_name = "OP_PUTPUBFH",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_PUTROOTFH] = {
.op_func = nfsd4_putrootfh,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
.op_name = "OP_PUTROOTFH",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_READ] = {
.op_func = nfsd4_read,
.op_release = nfsd4_read_release,
.op_name = "OP_READ",
.op_rsize_bop = nfsd4_read_rsize,
.op_get_currentstateid = nfsd4_get_readstateid,
},
[OP_READDIR] = {
.op_func = nfsd4_readdir,
.op_name = "OP_READDIR",
.op_rsize_bop = nfsd4_readdir_rsize,
},
[OP_READLINK] = {
.op_func = nfsd4_readlink,
.op_name = "OP_READLINK",
.op_rsize_bop = nfsd4_readlink_rsize,
},
[OP_REMOVE] = {
.op_func = nfsd4_remove,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_REMOVE",
.op_rsize_bop = nfsd4_remove_rsize,
},
[OP_RENAME] = {
.op_func = nfsd4_rename,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_RENAME",
.op_rsize_bop = nfsd4_rename_rsize,
},
[OP_RENEW] = {
.op_func = nfsd4_renew,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING,
.op_name = "OP_RENEW",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_RESTOREFH] = {
.op_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 = nfsd4_only_status_rsize,
},
[OP_SAVEFH] = {
.op_func = nfsd4_savefh,
.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
.op_name = "OP_SAVEFH",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_SECINFO] = {
.op_func = nfsd4_secinfo,
.op_release = nfsd4_secinfo_release,
.op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO",
.op_rsize_bop = nfsd4_secinfo_rsize,
},
[OP_SETATTR] = {
.op_func = nfsd4_setattr,
.op_name = "OP_SETATTR",
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
| OP_NONTRIVIAL_ERROR_ENCODE,
.op_rsize_bop = nfsd4_setattr_rsize,
.op_get_currentstateid = nfsd4_get_setattrstateid,
},
[OP_SETCLIENTID] = {
.op_func = nfsd4_setclientid,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING | OP_CACHEME
| OP_NONTRIVIAL_ERROR_ENCODE,
.op_name = "OP_SETCLIENTID",
.op_rsize_bop = nfsd4_setclientid_rsize,
},
[OP_SETCLIENTID_CONFIRM] = {
.op_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 = nfsd4_only_status_rsize,
},
[OP_VERIFY] = {
.op_func = nfsd4_verify,
.op_name = "OP_VERIFY",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_WRITE] = {
.op_func = nfsd4_write,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_WRITE",
.op_rsize_bop = nfsd4_write_rsize,
.op_get_currentstateid = nfsd4_get_writestateid,
},
[OP_RELEASE_LOCKOWNER] = {
.op_func = nfsd4_release_lockowner,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING,
.op_name = "OP_RELEASE_LOCKOWNER",
.op_rsize_bop = nfsd4_only_status_rsize,
},
/* NFSv4.1 operations */
[OP_EXCHANGE_ID] = {
.op_func = nfsd4_exchange_id,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_EXCHANGE_ID",
.op_rsize_bop = nfsd4_exchange_id_rsize,
},
[OP_BACKCHANNEL_CTL] = {
.op_func = nfsd4_backchannel_ctl,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_BACKCHANNEL_CTL",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_BIND_CONN_TO_SESSION] = {
.op_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 = nfsd4_bind_conn_to_session_rsize,
},
[OP_CREATE_SESSION] = {
.op_func = nfsd4_create_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_CREATE_SESSION",
.op_rsize_bop = nfsd4_create_session_rsize,
},
[OP_DESTROY_SESSION] = {
.op_func = nfsd4_destroy_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_DESTROY_SESSION",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_SEQUENCE] = {
.op_func = nfsd4_sequence,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
.op_name = "OP_SEQUENCE",
.op_rsize_bop = nfsd4_sequence_rsize,
},
[OP_DESTROY_CLIENTID] = {
.op_func = nfsd4_destroy_clientid,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
| OP_MODIFIES_SOMETHING,
.op_name = "OP_DESTROY_CLIENTID",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_RECLAIM_COMPLETE] = {
.op_func = nfsd4_reclaim_complete,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_RECLAIM_COMPLETE",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_SECINFO_NO_NAME] = {
.op_func = nfsd4_secinfo_no_name,
.op_release = nfsd4_secinfo_no_name_release,
.op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO_NO_NAME",
.op_rsize_bop = nfsd4_secinfo_rsize,
},
[OP_TEST_STATEID] = {
.op_func = nfsd4_test_stateid,
.op_flags = ALLOWED_WITHOUT_FH,
.op_name = "OP_TEST_STATEID",
.op_rsize_bop = nfsd4_test_stateid_rsize,
},
[OP_FREE_STATEID] = {
.op_func = nfsd4_free_stateid,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_FREE_STATEID",
.op_get_currentstateid = nfsd4_get_freestateid,
.op_rsize_bop = nfsd4_only_status_rsize,
},
#ifdef CONFIG_NFSD_PNFS
[OP_GETDEVICEINFO] = {
.op_func = nfsd4_getdeviceinfo,
.op_release = nfsd4_getdeviceinfo_release,
.op_flags = ALLOWED_WITHOUT_FH,
.op_name = "OP_GETDEVICEINFO",
.op_rsize_bop = nfsd4_getdeviceinfo_rsize,
},
[OP_LAYOUTGET] = {
.op_func = nfsd4_layoutget,
.op_release = nfsd4_layoutget_release,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LAYOUTGET",
.op_rsize_bop = nfsd4_layoutget_rsize,
},
[OP_LAYOUTCOMMIT] = {
.op_func = nfsd4_layoutcommit,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LAYOUTCOMMIT",
.op_rsize_bop = nfsd4_layoutcommit_rsize,
},
[OP_LAYOUTRETURN] = {
.op_func = nfsd4_layoutreturn,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_LAYOUTRETURN",
.op_rsize_bop = nfsd4_layoutreturn_rsize,
},
#endif /* CONFIG_NFSD_PNFS */
/* NFSv4.2 operations */
[OP_ALLOCATE] = {
.op_func = nfsd4_allocate,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_ALLOCATE",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_DEALLOCATE] = {
.op_func = nfsd4_deallocate,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_DEALLOCATE",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_CLONE] = {
.op_func = nfsd4_clone,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_CLONE",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_COPY] = {
.op_func = nfsd4_copy,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_COPY",
.op_rsize_bop = nfsd4_copy_rsize,
},
[OP_READ_PLUS] = {
.op_func = nfsd4_read,
.op_release = nfsd4_read_release,
.op_name = "OP_READ_PLUS",
.op_rsize_bop = nfsd4_read_plus_rsize,
.op_get_currentstateid = nfsd4_get_readstateid,
},
[OP_SEEK] = {
.op_func = nfsd4_seek,
.op_name = "OP_SEEK",
.op_rsize_bop = nfsd4_seek_rsize,
},
[OP_OFFLOAD_STATUS] = {
.op_func = nfsd4_offload_status,
.op_name = "OP_OFFLOAD_STATUS",
.op_rsize_bop = nfsd4_offload_status_rsize,
},
[OP_OFFLOAD_CANCEL] = {
.op_func = nfsd4_offload_cancel,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_OFFLOAD_CANCEL",
.op_rsize_bop = nfsd4_only_status_rsize,
},
[OP_COPY_NOTIFY] = {
.op_func = nfsd4_copy_notify,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_COPY_NOTIFY",
.op_rsize_bop = nfsd4_copy_notify_rsize,
},
[OP_GETXATTR] = {
.op_func = nfsd4_getxattr,
.op_name = "OP_GETXATTR",
.op_rsize_bop = nfsd4_getxattr_rsize,
},
[OP_SETXATTR] = {
.op_func = nfsd4_setxattr,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_SETXATTR",
.op_rsize_bop = nfsd4_setxattr_rsize,
},
[OP_LISTXATTRS] = {
.op_func = nfsd4_listxattrs,
.op_name = "OP_LISTXATTRS",
.op_rsize_bop = nfsd4_listxattrs_rsize,
},
[OP_REMOVEXATTR] = {
.op_func = nfsd4_removexattr,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_REMOVEXATTR",
.op_rsize_bop = nfsd4_removexattr_rsize,
},
};
/**
* nfsd4_spo_must_allow - Determine if the compound op contains an
* operation that is allowed to be sent with machine credentials
*
* @rqstp: a pointer to the struct svc_rqst
*
* Checks to see if the compound contains a spo_must_allow op
* and confirms that it was sent with the proper machine creds.
*/
bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
{
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfsd4_compoundargs *argp = rqstp->rq_argp;
struct nfsd4_op *this;
struct nfsd4_compound_state *cstate = &resp->cstate;
struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
u32 opiter;
if (!cstate->minorversion)
return false;
if (cstate->spo_must_allowed)
return true;
opiter = resp->opcnt;
while (opiter < argp->opcnt) {
this = &argp->ops[opiter++];
if (test_bit(this->opnum, allow->u.longs) &&
cstate->clp->cl_mach_cred &&
nfsd4_mach_creds_match(cstate->clp, rqstp)) {
cstate->spo_must_allowed = true;
return true;
}
}
cstate->spo_must_allowed = false;
return false;
}
int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
return op_encode_hdr_size * sizeof(__be32);
BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
return OPDESC(op)->op_rsize_bop(rqstp, op);
}
void warn_on_nonidempotent_op(struct nfsd4_op *op)
{
if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
op->opnum, nfsd4_op_name(op->opnum));
WARN_ON_ONCE(1);
}
}
static const char *nfsd4_op_name(unsigned opnum)
{
if (opnum < ARRAY_SIZE(nfsd4_ops))
return nfsd4_ops[opnum].op_name;
return "unknown_operation";
}
static const struct svc_procedure nfsd_procedures4[2] = {
[NFSPROC4_NULL] = {
.pc_func = nfsd4_proc_null,
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 1,
.pc_name = "NULL",
},
[NFSPROC4_COMPOUND] = {
.pc_func = nfsd4_proc_compound,
.pc_decode = nfs4svc_decode_compoundargs,
.pc_encode = 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,
.pc_name = "COMPOUND",
},
};
static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
const struct svc_version nfsd_version4 = {
.vs_vers = 4,
.vs_nproc = 2,
.vs_proc = nfsd_procedures4,
.vs_count = nfsd_count3,
.vs_dispatch = nfsd_dispatch,
.vs_xdrsize = NFS4_SVC_XDRSIZE,
.vs_rpcb_optnl = true,
.vs_need_cong_ctrl = true,
};
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