#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");
static void cleanup_async_copy(struct nfsd4_copy *copy);
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
static int nfsd4_ssc_umount_timeout = 900000;
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 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_POSIX_DEFAULT_ACL |
FATTR4_WORD2_POSIX_ACCESS_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 nfsd4_compound_state *cstate,
struct nfsd4_open *open)
{
__be32 status = nfs_ok;
if (open->op_create != NFS4_OPEN_CREATE)
return status;
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
case NFS4_CREATE_GUARDED:
status = check_attr_support(cstate, open->op_bmval,
nfsd_attrmask);
break;
case NFS4_CREATE_EXCLUSIVE4_1:
status = check_attr_support(cstate, open->op_bmval,
nfsd41_ex_attrmask);
break;
}
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)
{
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;
return fh_verify(rqstp, current_fh, S_IFREG, accmode);
}
static __be32 nfsd_check_obj_isreg(struct svc_fh *fh, u32 minor_version)
{
umode_t mode = d_inode(fh->fh_dentry)->i_mode;
if (S_ISREG(mode))
return nfs_ok;
if (S_ISDIR(mode))
return nfserr_isdir;
if (S_ISLNK(mode))
return nfserr_symlink;
if (minor_version == 0)
return nfserr_symlink;
else
return nfserr_wrong_type;
}
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;
if (nfsd4_create_is_exclusive(open->op_createmode))
oflags |= O_EXCL;
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());
*child = path.dentry;
if (IS_ERR(filp))
return nfserrno(PTR_ERR(filp));
open->op_filp = filp;
return nfs_ok;
}
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 (open->op_acl) {
if (open->op_dpacl || open->op_pacl) {
status = nfserr_inval;
goto out_write;
}
if (is_create_with_attrs(open))
nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
} else if (is_create_with_attrs(open)) {
attrs.na_dpacl = open->op_dpacl;
attrs.na_pacl = open->op_pacl;
open->op_dpacl = NULL;
open->op_pacl = NULL;
}
child = start_creating(&nop_mnt_idmap, parent,
&QSTR_LEN(open->op_fname, open->op_fnamelen));
if (IS_ERR(child)) {
status = nfserrno(PTR_ERR(child));
goto out_write;
}
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;
v_mtime = verifier[0] & 0x7fffffff;
v_atime = verifier[1] & 0x7fffffff;
}
if (d_really_is_positive(child)) {
status = fh_fill_both_attrs(fhp);
if (status != nfs_ok)
goto out;
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
if (!d_is_reg(child))
break;
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 (inode_get_mtime_sec(d_inode(child)) == v_mtime &&
inode_get_atime_sec(d_inode(child)) == v_atime &&
d_inode(child)->i_size == 0) {
open->op_created = true;
break;
}
status = nfserr_exist;
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (inode_get_mtime_sec(d_inode(child)) == v_mtime &&
inode_get_atime_sec(d_inode(child)) == v_atime &&
d_inode(child)->i_size == 0) {
open->op_created = true;
goto set_attr;
}
status = nfserr_exist;
}
goto out;
}
if (!IS_POSIXACL(inode))
iap->ia_mode &= ~current_umask();
status = fh_fill_pre_attrs(fhp);
if (status != nfs_ok)
goto out;
status = nfsd4_vfs_create(fhp, &child, open);
if (status != nfs_ok)
goto out;
open->op_created = true;
fh_fill_post_attrs(fhp);
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_paclerr || attrs.na_dpaclerr)
open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
if (attrs.na_dpaclerr)
open->op_bmval[2] &= ~FATTR4_WORD2_POSIX_DEFAULT_ACL;
if (attrs.na_paclerr)
open->op_bmval[2] &= ~FATTR4_WORD2_POSIX_ACCESS_ACL;
out:
end_creating(child);
nfsd_attrs_free(&attrs);
out_write:
fh_drop_write(fhp);
return status;
}
static void
set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
{
cinfo->atomic = (u32)(fhp->fh_pre_saved && fhp->fh_post_saved && !fhp->fh_no_atomic_attr);
cinfo->before_change = fhp->fh_pre_change;
cinfo->after_change = fhp->fh_post_change;
if (WARN_ON_ONCE(!fhp->fh_pre_saved))
cinfo->before_change = 0;
if (!fhp->fh_post_saved)
cinfo->after_change = cinfo->before_change + 1;
}
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_obj(struct svc_fh);
if (!*resfh)
return nfserr_jukebox;
fh_init(*resfh, NFS4_FHSIZE);
open->op_truncate = false;
if (open->op_create) {
current->fs->umask = open->op_umask;
status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
current->fs->umask = 0;
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 == nfs_ok)
status = fh_fill_both_attrs(current_fh);
}
if (status)
goto out;
status = nfsd_check_obj_isreg(*resfh, cstate->minorversion);
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;
int accmode = 0;
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);
if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
accmode = NFSD_MAY_OWNER_OVERRIDE;
return do_open_permission(rqstp, current_fh, open, accmode);
}
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;
if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) {
status = nfserr_inval;
goto out_err;
}
open->op_created = false;
if (nfsd4_has_session(cstate) &&
!test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) {
status = nfserr_grace;
goto out_err;
}
if (nfsd4_has_session(cstate))
copy_clientid(&open->op_clientid, cstate->session);
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(cstate, open);
if (status)
goto out;
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);
out_err:
posix_acl_release(open->op_dpacl);
posix_acl_release(open->op_pacl);
return status;
}
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);
}
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)
{
fh_put(&cstate->current_fh);
return exp_pseudoroot(rqstp, &cstate->current_fh);
}
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;
}
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 __be32
nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_commit *commit = &u->commit;
struct nfsd_file *nf;
__be32 status;
status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE |
NFSD_MAY_NOT_BREAK_LEASE, &nf);
if (status != nfs_ok)
return status;
status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset,
commit->co_count,
(__be32 *)commit->co_verf.data);
nfsd_file_put(nf);
return status;
}
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,
.na_dpacl = create->cr_dpacl,
.na_pacl = create->cr_pacl,
};
struct svc_fh resfh;
__be32 status;
dev_t rdev;
create->cr_dpacl = NULL;
create->cr_pacl = NULL;
fh_init(&resfh, NFS4_FHSIZE);
status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
if (status)
goto out_aftermask;
status = check_attr_support(cstate, create->cr_bmval, nfsd_attrmask);
if (status)
goto out_aftermask;
if (create->cr_acl) {
if (create->cr_dpacl || create->cr_pacl) {
status = nfserr_inval;
goto out_aftermask;
}
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_paclerr || attrs.na_dpaclerr)
create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
if (attrs.na_dpaclerr)
create->cr_bmval[2] &= ~FATTR4_WORD2_POSIX_DEFAULT_ACL;
if (attrs.na_paclerr)
create->cr_bmval[2] &= ~FATTR4_WORD2_POSIX_ACCESS_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;
out_aftermask:
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;
trace_nfsd_vfs_getattr(rqstp, &cstate->current_fh);
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 (!nfsd4_last_compound_op(rqstp)) {
struct nfsd4_compoundargs *argp = rqstp->rq_argp;
argp->splice_ok = false;
}
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&read->rd_stateid, RD_STATE,
&read->rd_nf, NULL);
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) {
trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
u->read.rd_offset, u->read.rd_length);
nfsd_file_put(u->read.rd_nf);
}
}
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;
trace_nfsd_vfs_readdir(rqstp, &cstate->current_fh,
readdir->rd_maxcount, readdir->rd_cookie);
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->save_fh);
set_change_info(&rename->rn_tinfo, &cstate->current_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)
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 void
vet_deleg_attrs(struct nfsd4_setattr *setattr, struct nfs4_delegation *dp)
{
struct timespec64 now = current_time(dp->dl_stid.sc_file->fi_inode);
struct iattr *iattr = &setattr->sa_iattr;
if ((setattr->sa_bmval[2] & FATTR4_WORD2_TIME_DELEG_ACCESS) &&
!nfsd4_vet_deleg_time(&iattr->ia_atime, &dp->dl_atime, &now))
iattr->ia_valid &= ~(ATTR_ATIME | ATTR_ATIME_SET);
if (setattr->sa_bmval[2] & FATTR4_WORD2_TIME_DELEG_MODIFY) {
if (nfsd4_vet_deleg_time(&iattr->ia_mtime, &dp->dl_mtime, &now)) {
iattr->ia_ctime = iattr->ia_mtime;
if (nfsd4_vet_deleg_time(&iattr->ia_ctime, &dp->dl_ctime, &now))
dp->dl_setattr = true;
else
iattr->ia_valid &= ~(ATTR_CTIME | ATTR_CTIME_SET);
} else {
iattr->ia_valid &= ~(ATTR_CTIME | ATTR_CTIME_SET |
ATTR_MTIME | ATTR_MTIME_SET);
}
}
}
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,
.na_pacl = setattr->sa_pacl,
.na_dpacl = setattr->sa_dpacl,
};
bool save_no_wcc, deleg_attrs;
struct nfs4_stid *st = NULL;
struct inode *inode;
__be32 status = nfs_ok;
int err;
setattr->sa_pacl = NULL;
setattr->sa_dpacl = NULL;
deleg_attrs = setattr->sa_bmval[2] & (FATTR4_WORD2_TIME_DELEG_ACCESS |
FATTR4_WORD2_TIME_DELEG_MODIFY);
if (deleg_attrs || (setattr->sa_iattr.ia_valid & ATTR_SIZE)) {
int flags = WR_STATE;
if (setattr->sa_bmval[2] & FATTR4_WORD2_TIME_DELEG_ACCESS)
flags |= RD_STATE;
status = nfs4_preprocess_stateid_op(rqstp, cstate,
&cstate->current_fh, &setattr->sa_stateid,
flags, NULL, &st);
if (status)
goto out_err;
}
if (deleg_attrs) {
status = nfserr_bad_stateid;
if (st->sc_type & SC_TYPE_DELEG) {
struct nfs4_delegation *dp = delegstateid(st);
if (deleg_attrs_deleg(dp->dl_type)) {
vet_deleg_attrs(setattr, dp);
status = nfs_ok;
}
}
}
if (st)
nfs4_put_stid(st);
if (status)
goto out_err;
err = fh_want_write(&cstate->current_fh);
if (err) {
status = nfserrno(err);
goto out_err;
}
status = nfs_ok;
status = check_attr_support(cstate, setattr->sa_bmval, nfsd_attrmask);
if (status)
goto out;
if (setattr->sa_acl && (attrs.na_dpacl || attrs.na_pacl)) {
status = nfserr_inval;
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;
save_no_wcc = cstate->current_fh.fh_no_wcc;
cstate->current_fh.fh_no_wcc = true;
status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs, NULL);
cstate->current_fh.fh_no_wcc = save_no_wcc;
if (!status)
status = nfserrno(attrs.na_labelerr);
if (!status)
status = nfserrno(attrs.na_dpaclerr);
if (!status)
status = nfserrno(attrs.na_paclerr);
out:
fh_drop_write(&cstate->current_fh);
out_err:
nfsd_attrs_free(&attrs);
return status;
}
static void nfsd4_file_mark_deleg_written(struct nfs4_file *fi)
{
spin_lock(&fi->fi_lock);
if (!list_empty(&fi->fi_delegations)) {
struct nfs4_delegation *dp = list_first_entry(&fi->fi_delegations,
struct nfs4_delegation, dl_perfile);
if (dp->dl_type == OPEN_DELEGATE_WRITE_ATTRS_DELEG)
dp->dl_written = true;
}
spin_unlock(&fi->fi_lock);
}
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 nfs4_stid *stid = NULL;
struct nfsd_file *nf = NULL;
__be32 status = nfs_ok;
unsigned long cnt;
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, &stid);
if (status)
return status;
if (stid) {
nfsd4_file_mark_deleg_written(stid->sc_file);
nfs4_put_stid(stid);
}
write->wr_how_written = write->wr_stable_how;
status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
write->wr_offset, &write->wr_payload,
&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)
goto out;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
dst_stateid, WR_STATE, dst, NULL);
if (status)
goto out_put_src;
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);
*dst = NULL;
out_put_src:
nfsd_file_put(*src);
*src = NULL;
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;
}
bool nfsd4_has_active_async_copies(struct nfs4_client *clp)
{
struct nfsd4_copy *copy;
bool result = false;
spin_lock(&clp->async_lock);
list_for_each_entry(copy, &clp->async_copies, copies) {
if (!test_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags) &&
!test_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags)) {
result = true;
break;
}
}
spin_unlock(&clp->async_lock);
return result;
}
void nfsd4_async_copy_reaper(struct nfsd_net *nn)
{
struct nfs4_client *clp;
struct nfsd4_copy *copy;
LIST_HEAD(reaplist);
spin_lock(&nn->client_lock);
list_for_each_entry(clp, &nn->client_lru, cl_lru) {
struct list_head *pos, *next;
spin_lock(&clp->async_lock);
list_for_each_safe(pos, next, &clp->async_copies) {
copy = list_entry(pos, struct nfsd4_copy, copies);
if (test_bit(NFSD4_COPY_F_OFFLOAD_DONE, ©->cp_flags)) {
if (--copy->cp_ttl) {
list_del_init(©->copies);
list_add(©->copies, &reaplist);
}
}
}
spin_unlock(&clp->async_lock);
}
spin_unlock(&nn->client_lock);
while (!list_empty(&reaplist)) {
copy = list_first_entry(&reaplist, struct nfsd4_copy, copies);
list_del_init(©->copies);
cleanup_async_copy(copy);
}
}
static void nfs4_put_copy(struct nfsd4_copy *copy)
{
if (!refcount_dec_and_test(©->refcount))
return;
kfree(copy->cp_src);
kfree(copy);
}
static void release_copy_files(struct nfsd4_copy *copy);
static void nfsd4_stop_copy(struct nfsd4_copy *copy)
{
trace_nfsd_copy_async_cancel(copy);
if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags)) {
kthread_stop(copy->copy_task);
if (!test_bit(NFSD4_COPY_F_CB_ERROR, ©->cp_flags))
copy->nfserr = nfs_ok;
set_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags);
}
release_copy_files(copy);
nfs4_put_copy(copy);
}
static struct nfsd4_copy *nfsd4_unhash_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(©->refcount);
copy->cp_clp = NULL;
if (!list_empty(©->copies))
list_del_init(©->copies);
}
spin_unlock(&clp->async_lock);
return copy;
}
void nfsd4_shutdown_copy(struct nfs4_client *clp)
{
struct nfsd4_copy *copy;
while ((copy = nfsd4_unhash_copy(clp)) != NULL)
nfsd4_stop_copy(copy);
}
static bool nfsd4_copy_on_sb(const struct nfsd4_copy *copy,
const struct super_block *sb)
{
if (copy->nf_src &&
file_inode(copy->nf_src->nf_file)->i_sb == sb)
return true;
if (copy->nf_dst &&
file_inode(copy->nf_dst->nf_file)->i_sb == sb)
return true;
return false;
}
void nfsd4_cancel_copy_by_sb(struct net *net, struct super_block *sb)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
struct nfsd4_copy *copy, *tmp;
struct nfs4_client *clp;
unsigned int idhashval;
LIST_HEAD(to_cancel);
spin_lock(&nn->client_lock);
for (idhashval = 0; idhashval < CLIENT_HASH_SIZE; idhashval++) {
struct list_head *head = &nn->conf_id_hashtbl[idhashval];
list_for_each_entry(clp, head, cl_idhash) {
spin_lock(&clp->async_lock);
list_for_each_entry_safe(copy, tmp,
&clp->async_copies, copies) {
if (nfsd4_copy_on_sb(copy, sb)) {
refcount_inc(©->refcount);
kref_get(&clp->cl_nfsdfs.cl_ref);
copy->nfserr = nfserr_admin_revoked;
set_bit(NFSD4_COPY_F_CB_ERROR,
©->cp_flags);
list_move(©->copies, &to_cancel);
}
}
spin_unlock(&clp->async_lock);
}
}
spin_unlock(&nn->client_lock);
list_for_each_entry_safe(copy, tmp, &to_cancel, copies) {
struct nfs4_client *clp = copy->cp_clp;
list_del_init(©->copies);
nfsd4_stop_copy(copy);
nfsd4_put_client(clp);
}
}
#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"
static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
struct nfsd4_ssc_umount_item **nsui,
struct svc_rqst *rqstp)
{
struct nfsd4_ssc_umount_item *ni = NULL;
struct nfsd4_ssc_umount_item *work = NULL;
struct nfsd4_ssc_umount_item *tmp;
DEFINE_WAIT(wait);
__be32 status = 0;
*nsui = NULL;
work = kzalloc_obj(*work);
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;
if (ni->nsui_busy) {
prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, TASK_IDLE);
spin_unlock(&nn->nfsd_ssc_lock);
if (svc_thread_should_stop(rqstp) ||
(schedule_timeout(20*HZ) == 0)) {
finish_wait(&nn->nfsd_ssc_waitq, &wait);
kfree(work);
return nfserr_jukebox;
}
finish_wait(&nn->nfsd_ssc_waitq, &wait);
goto try_again;
}
*nsui = ni;
refcount_inc(&ni->nsui_refcnt);
spin_unlock(&nn->nfsd_ssc_lock);
kfree(work);
return 0;
}
if (work) {
strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr));
refcount_set(&work->nsui_refcnt, 2);
work->nsui_busy = true;
list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
*nsui = work;
} else
status = nfserr_resource;
spin_unlock(&nn->nfsd_ssc_lock);
return status;
}
static void nfsd4_ssc_update_dul(struct nfsd_net *nn,
struct nfsd4_ssc_umount_item *nsui,
struct vfsmount *ss_mnt)
{
spin_lock(&nn->nfsd_ssc_lock);
nsui->nsui_vfsmount = ss_mnt;
nsui->nsui_busy = false;
wake_up_all(&nn->nfsd_ssc_waitq);
spin_unlock(&nn->nfsd_ssc_lock);
}
static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn,
struct nfsd4_ssc_umount_item *nsui)
{
spin_lock(&nn->nfsd_ssc_lock);
list_del(&nsui->nsui_list);
wake_up_all(&nn->nfsd_ssc_waitq);
spin_unlock(&nn->nfsd_ssc_lock);
kfree(nsui);
}
static __be32
nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
struct nfsd4_ssc_umount_item **nsui)
{
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 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));
*nsui = NULL;
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;
len = RPC_MAX_ADDRBUFLEN + 1;
ipaddr = kzalloc(len, GFP_KERNEL);
if (!ipaddr)
goto out_err;
rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
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;
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, nsui, rqstp);
if (status)
goto out_free_devname;
if ((*nsui)->nsui_vfsmount)
goto out_done;
ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
module_put(type->owner);
if (IS_ERR(ss_mnt)) {
status = nfserr_nodev;
nfsd4_ssc_cancel_dul(nn, *nsui);
goto out_free_devname;
}
nfsd4_ssc_update_dul(nn, *nsui, ss_mnt);
out_done:
status = 0;
out_free_devname:
kfree(dev_name);
out_free_rawdata:
kfree(raw_data);
out_free_ipaddr:
kfree(ipaddr);
out_err:
return status;
}
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy)
{
struct svc_fh *s_fh = NULL;
stateid_t *s_stid = ©->cp_src_stateid;
__be32 status = nfserr_inval;
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
©->cp_dst_stateid,
WR_STATE, ©->nf_dst, NULL);
if (status)
goto out;
status = nfsd4_interssc_connect(copy->cp_src, rqstp, ©->ss_nsui);
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 nfsd4_ssc_umount_item *nsui, struct file *filp,
struct nfsd_file *dst)
{
struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
long timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
nfs42_ssc_close(filp);
fput(filp);
spin_lock(&nn->nfsd_ssc_lock);
list_del(&nsui->nsui_list);
refcount_dec(&nsui->nsui_refcnt);
nsui->nsui_expire = jiffies + timeout;
list_add_tail(&nsui->nsui_list, &nn->nfsd_ssc_mount_list);
spin_unlock(&nn->nfsd_ssc_lock);
}
#else
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy)
{
return nfserr_inval;
}
static void
nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
struct nfsd_file *dst)
{
}
static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
struct nfs_fh *src_fh,
nfs4_stateid *stateid)
{
return NULL;
}
#endif
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, ©->cp_src_stateid,
©->nf_src, ©->cp_dst_stateid,
©->nf_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);
struct nfsd4_copy *copy =
container_of(cbo, struct nfsd4_copy, cp_cb_offload);
set_bit(NFSD4_COPY_F_OFFLOAD_DONE, ©->cp_flags);
nfsd4_put_client(cb->cb_clp);
}
static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
struct rpc_task *task)
{
struct nfsd4_cb_offload *cbo =
container_of(cb, struct nfsd4_cb_offload, co_cb);
trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
switch (task->tk_status) {
case -NFS4ERR_DELAY:
if (cbo->co_retries--) {
rpc_delay(task, HZ / 5);
return 0;
}
}
nfsd41_cb_destroy_referring_call_list(cb);
return 1;
}
static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
.release = nfsd4_cb_offload_release,
.done = nfsd4_cb_offload_done,
.opcode = OP_CB_OFFLOAD,
};
static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
{
copy->cp_res.wr_stable_how =
test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ?
NFS_FILE_SYNC : NFS_UNSTABLE;
nfsd4_copy_set_sync(copy, sync);
}
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;
loff_t end;
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));
if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
since = READ_ONCE(dst->f_wb_err);
end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1;
status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0);
if (!status)
status = filemap_check_wb_err(dst->f_mapping, since);
if (!status)
set_bit(NFSD4_COPY_F_COMMITTED, ©->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);
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);
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_nsui = src->ss_nsui;
}
static void release_copy_files(struct nfsd4_copy *copy)
{
if (copy->nf_src) {
nfsd_file_put(copy->nf_src);
copy->nf_src = NULL;
}
if (copy->nf_dst) {
nfsd_file_put(copy->nf_dst);
copy->nf_dst = NULL;
}
}
static void cleanup_async_copy(struct nfsd4_copy *copy)
{
nfs4_free_copy_state(copy);
release_copy_files(copy);
if (copy->cp_clp) {
spin_lock(©->cp_clp->async_lock);
if (!list_empty(©->copies))
list_del_init(©->copies);
spin_unlock(©->cp_clp->async_lock);
}
nfs4_put_copy(copy);
}
static void nfsd4_send_cb_offload(struct nfsd4_copy *copy)
{
struct nfsd4_cb_offload *cbo = ©->cp_cb_offload;
struct nfs4_client *clp = copy->cp_clp;
if (!clp) {
set_bit(NFSD4_COPY_F_OFFLOAD_DONE, ©->cp_flags);
return;
}
memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res));
memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh));
cbo->co_nfserr = copy->nfserr;
cbo->co_retries = 5;
kref_get(&clp->cl_nfsdfs.cl_ref);
nfsd4_init_cb(&cbo->co_cb, clp, &nfsd4_cb_offload_ops,
NFSPROC4_CLNT_CB_OFFLOAD);
nfsd41_cb_referring_call(&cbo->co_cb, &cbo->co_referring_sessionid,
cbo->co_referring_slotid,
cbo->co_referring_seqno);
trace_nfsd_cb_offload(clp, &cbo->co_res.cb_stateid,
&cbo->co_fh, copy->cp_count, copy->nfserr);
nfsd4_try_run_cb(&cbo->co_cb);
}
static int nfsd4_do_async_copy(void *data)
{
struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
__be32 nfserr = nfs_ok;
trace_nfsd_copy_async(copy);
if (nfsd4_ssc_is_inter(copy)) {
struct file *filp;
filp = nfs42_ssc_open(copy->ss_nsui->nsui_vfsmount,
©->c_fh, ©->stateid);
if (IS_ERR(filp)) {
switch (PTR_ERR(filp)) {
case -EBADF:
nfserr = nfserr_wrong_type;
break;
default:
nfserr = nfserr_offload_denied;
}
goto do_callback;
}
nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
false);
nfsd4_cleanup_inter_ssc(copy->ss_nsui, filp, copy->nf_dst);
} else {
nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
copy->nf_dst->nf_file, false);
}
do_callback:
if (!test_bit(NFSD4_COPY_F_CB_ERROR, ©->cp_flags))
copy->nfserr = nfserr;
set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags);
set_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags);
trace_nfsd_copy_async_done(copy);
nfsd4_send_cb_offload(copy);
atomic_dec(©->cp_nn->pending_async_copies);
return 0;
}
static __be32
nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct nfsd4_copy *async_copy = NULL;
struct nfsd4_copy *copy = &u->copy;
struct nfsd42_write_res *result;
__be32 status;
result = ©->cp_res;
nfsd_copy_write_verifier((__be32 *)&result->wr_verifier.data, nn);
copy->cp_clp = cstate->clp;
if (nfsd4_ssc_is_inter(copy)) {
trace_nfsd_copy_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);
if (status) {
trace_nfsd_copy_done(copy, status);
return nfserr_offload_denied;
}
} else {
trace_nfsd_copy_intra(copy);
status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
if (status) {
trace_nfsd_copy_done(copy, status);
return status;
}
}
memcpy(©->fh, &cstate->current_fh.fh_handle,
sizeof(struct knfsd_fh));
if (nfsd4_copy_is_async(copy)) {
async_copy = kzalloc_obj(struct nfsd4_copy);
if (!async_copy)
goto out_err;
async_copy->cp_nn = nn;
INIT_LIST_HEAD(&async_copy->copies);
refcount_set(&async_copy->refcount, 1);
async_copy->cp_ttl = NFSD_COPY_INITIAL_TTL;
if (atomic_inc_return(&nn->pending_async_copies) >
(int)rqstp->rq_pool->sp_nrthreads)
goto out_dec_async_copy_err;
async_copy->cp_src = kmalloc_obj(*async_copy->cp_src);
if (!async_copy->cp_src)
goto out_dec_async_copy_err;
if (!nfs4_init_copy_state(nn, copy))
goto out_dec_async_copy_err;
memcpy(&result->cb_stateid, ©->cp_stateid.cs_stid,
sizeof(result->cb_stateid));
dup_copy_fields(copy, async_copy);
memcpy(async_copy->cp_cb_offload.co_referring_sessionid.data,
cstate->session->se_sessionid.data,
NFS4_MAX_SESSIONID_LEN);
async_copy->cp_cb_offload.co_referring_slotid = cstate->slot->sl_index;
async_copy->cp_cb_offload.co_referring_seqno = cstate->slot->sl_seqid;
async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
async_copy, "%s", "copy thread");
if (IS_ERR(async_copy->copy_task))
goto out_dec_async_copy_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);
}
out:
trace_nfsd_copy_done(copy, status);
release_copy_files(copy);
return status;
out_dec_async_copy_err:
if (async_copy)
atomic_dec(&nn->pending_async_copies);
out_err:
if (nfsd4_ssc_is_inter(copy)) {
refcount_dec(©->ss_nsui->nsui_refcnt);
}
if (async_copy)
cleanup_async_copy(async_copy);
status = nfserr_jukebox;
goto out;
}
static struct nfsd4_copy *
find_async_copy_locked(struct nfs4_client *clp, stateid_t *stateid)
{
struct nfsd4_copy *copy;
lockdep_assert_held(&clp->async_lock);
list_for_each_entry(copy, &clp->async_copies, copies) {
if (memcmp(©->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
continue;
return copy;
}
return NULL;
}
static struct nfsd4_copy *
find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
{
struct nfsd4_copy *copy;
spin_lock(&clp->async_lock);
copy = find_async_copy_locked(clp, stateid);
if (copy)
refcount_inc(©->refcount);
spin_unlock(&clp->async_lock);
return copy;
}
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 = NULL;
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;
if (!stid)
return nfserr_bad_stateid;
cn->cpn_lease_time.tv_sec = nn->nfsd4_lease;
cn->cpn_lease_time.tv_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.cs_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));
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)
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 = nfs_ok;
struct nfsd4_copy *copy;
struct nfs4_client *clp = cstate->clp;
os->completed = false;
spin_lock(&clp->async_lock);
copy = find_async_copy_locked(clp, &os->stateid);
if (copy) {
os->count = copy->cp_res.wr_bytes_written;
if (test_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags)) {
os->completed = true;
os->status = copy->nfserr;
}
} else
status = nfserr_bad_stateid;
spin_unlock(&clp->async_lock);
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)
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;
}
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;
}
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(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;
if (verify->ve_bmval[2] & (FATTR4_WORD2_POSIX_DEFAULT_ACL |
FATTR4_WORD2_POSIX_ACCESS_ACL))
return nfserr_inval;
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 (status == nfserr_resource)
status = nfserr_not_same;
if (status)
goto out_kfree;
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;
}
static __be32
nfsd4_get_dir_delegation(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_get_dir_delegation *gdd = &u->get_dir_delegation;
struct nfs4_delegation *dd;
struct nfsd_file *nf;
__be32 status;
status = nfsd_file_acquire_dir(rqstp, &cstate->current_fh, &nf);
if (status != nfs_ok)
return status;
dd = nfsd_get_dir_deleg(cstate, gdd, nf);
nfsd_file_put(nf);
if (IS_ERR(dd)) {
int err = PTR_ERR(dd);
if (err != -EAGAIN)
return nfserrno(err);
gdd->gddrnf_status = GDD4_UNAVAIL;
return nfs_ok;
}
gdd->gddrnf_status = GDD4_OK;
memcpy(&gdd->gddr_stateid, &dd->dl_stid.sc_stateid, sizeof(gdd->gddr_stateid));
nfs4_put_stid(&dd->dl_stid);
return nfs_ok;
}
#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->rq_chandle, SVC_NET(rqstp),
rqstp->rq_client, rqstp->rq_gssclient,
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 | NFSD_MAY_OWNER_OVERRIDE;
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;
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(rqstp, 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 net *net = SVC_NET(rqstp);
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;
struct inode *inode;
struct nfs4_layout_stateid *ls;
__be32 nfserr;
nfserr = fh_verify(rqstp, current_fh, 0,
NFSD_MAY_WRITE | NFSD_MAY_OWNER_OVERRIDE);
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);
lcp->lc_size_chg = false;
if (lcp->lc_newoffset) {
loff_t new_size = lcp->lc_last_wr + 1;
nfserr = nfserr_inval;
if (new_size <= seg->offset)
goto out;
if (new_size > seg->offset + seg->length)
goto out;
if (new_size > i_size_read(inode)) {
lcp->lc_size_chg = true;
lcp->lc_newsize = new_size;
}
}
nfserr = nfserr_grace;
if (locks_in_grace(net) && !lcp->lc_reclaim)
goto out;
nfserr = nfserr_no_grace;
if (!locks_in_grace(net) && lcp->lc_reclaim)
goto out;
if (!lcp->lc_reclaim) {
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);
if (nfserr == nfserr_bad_stateid)
nfserr = nfserr_badlayout;
goto out;
}
mutex_unlock(&ls->ls_mutex);
}
nfserr = ops->proc_layoutcommit(inode, rqstp, lcp);
if (!lcp->lc_reclaim) {
nfsd4_file_mark_deleg_written(ls->ls_stid.sc_file);
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
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)
{
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;
}
static __be32
nfsd4_proc_null(struct svc_rqst *rqstp)
{
return rpc_success;
}
static inline void nfsd4_increment_op_stats(struct nfsd_net *nn, u32 opnum)
{
if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
percpu_counter_inc(&nn->counter[NFSD_STATS_NFS4_OP(opnum)]);
}
static const struct nfsd4_operation nfsd4_ops[];
static const char *nfsd4_op_name(unsigned opnum);
static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
{
struct nfsd4_op *first_op = &args->ops[0];
if (args->minorversion == 0)
return nfs_ok;
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;
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;
if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
return false;
if (argp->opcnt == resp->opcnt)
return false;
if (next->opnum == OP_ILLEGAL)
return false;
nextd = OPDESC(next);
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;
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
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;
xdr_reserve_space(resp->xdr, XDR_UNIT);
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);
clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
status = nfserr_minor_vers_mismatch;
if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
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->tag, args->taglen, args->client_opcnt);
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
if (cstate->minorversion == 0 &&
args->client_opcnt > resp->opcnt) {
op->status = nfserr_resource;
goto encode_op;
}
}
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->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
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);
trace_nfsd_compound_op_err(rqstp, op->opnum, op->status);
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, false);
}
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->client_opcnt, resp->opcnt,
status, nfsd4_op_name(op->opnum));
nfsd4_cstate_clear_replay(cstate);
nfsd4_increment_op_stats(nn, op->opnum);
}
fh_put(current_fh);
fh_put(save_fh);
BUG_ON(cstate->replay_owner);
out:
cstate->status = status;
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)
#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 u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
{
u32 buflen;
buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
buflen -= rqstp->rq_auth_slack;
buflen -= rqstp->rq_res.head[0].iov_len;
return min_t(u32, buflen, svc_max_payload(rqstp));
}
static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size) * sizeof(__be32);
}
static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
}
static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2)* sizeof(__be32);
}
static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
}
static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
}
static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
const 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 nfsd4_max_payload(rqstp);
if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
return nfsd4_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;
}
ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
ret += 20;
return ret;
}
static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
}
static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
* sizeof(__be32);
}
static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
const 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 u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
u32 seg_len = 2 * (1 + 2 + 1);
return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + op_encode_verifier_maxsz +
XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
}
static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ op_encode_change_info_maxsz) * sizeof(__be32);
}
static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
}
static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
* sizeof(__be32);
}
static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
}
static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
(4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
}
static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
sizeof(__be32);
}
static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
}
static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + 1 + \
1 + 1 + \
4 + \
2 + \
\
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
\
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1 + \
0 ) * sizeof(__be32);
}
static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2 ) * sizeof(__be32);
}
static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2 + \
op_encode_channel_attrs_maxsz + \
op_encode_channel_attrs_maxsz) * sizeof(__be32);
}
static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 +
op_encode_stateid_maxsz +
2 +
1 +
op_encode_verifier_maxsz +
1 +
1 ) * sizeof(__be32);
}
static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
2 +
1 ) * sizeof(__be32);
}
static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
3 +
1 +
1 +
op_encode_stateid_maxsz +
1 +
1 +
1 +
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) )
* sizeof(__be32);
}
static u32 nfsd4_get_dir_delegation_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 +
op_encode_verifier_maxsz +
op_encode_stateid_maxsz +
2 +
2 +
2 );
}
#ifdef CONFIG_NFSD_PNFS
static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size +
1 +
XDR_QUADLEN(rlen) +
2 ) * sizeof(__be32);
}
#define MAX_LAYOUT_SIZE 128
static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 +
op_encode_stateid_maxsz +
1 +
MAX_LAYOUT_SIZE) * sizeof(__be32);
}
static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 +
2 ) * sizeof(__be32);
}
static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 +
op_encode_stateid_maxsz) * sizeof(__be32);
}
#endif
static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 3) * sizeof(__be32);
}
static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
const struct nfsd4_op *op)
{
u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
const 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_release = nfsd4_lock_release,
.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_release = nfsd4_lockt_release,
.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,
},
[OP_EXCHANGE_ID] = {
.op_func = nfsd4_exchange_id,
.op_release = nfsd4_exchange_id_release,
.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,
},
[OP_GET_DIR_DELEGATION] = {
.op_func = nfsd4_get_dir_delegation,
.op_flags = OP_MODIFIES_SOMETHING,
.op_name = "OP_GET_DIR_DELEGATION",
.op_rsize_bop = nfsd4_get_dir_delegation_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
[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,
},
};
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 (rqstp->rq_procinfo != &nfsd_version4.vs_proc[NFSPROC4_COMPOUND] ||
cstate->minorversion == 0)
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_argzero = 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_argzero = offsetof(struct nfsd4_compoundargs, iops),
.pc_ressize = sizeof(struct nfsd4_compoundres),
.pc_release = nfsd4_release_compoundargs,
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 3+NFSSVC_MAXBLKSIZE/4,
.pc_name = "COMPOUND",
},
};
static DEFINE_PER_CPU_ALIGNED(unsigned long,
nfsd_count4[ARRAY_SIZE(nfsd_procedures4)]);
const struct svc_version nfsd_version4 = {
.vs_vers = 4,
.vs_nproc = ARRAY_SIZE(nfsd_procedures4),
.vs_proc = nfsd_procedures4,
.vs_count = nfsd_count4,
.vs_dispatch = nfsd_dispatch,
.vs_xdrsize = NFS4_SVC_XDRSIZE,
.vs_rpcb_optnl = true,
.vs_need_cong_ctrl = true,
};
